From 38507bbb94f974deffa48d6eda7f7f4178ccf43a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=D0=9C=D0=B0=D0=BA=D1=81=D0=B8=D0=BC?= Date: Mon, 20 Jul 2020 14:49:05 +0500 Subject: [PATCH] update react build --- php/react/asset-manifest.json | 16 +++++----- php/react/index.html | 2 +- ...nifest.9a88b51448b0eef5b302b92cf53039e4.js | 30 ------------------- ...nifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js | 30 +++++++++++++++++++ php/react/service-worker.js | 2 +- php/react/static/js/2.3e36c635.chunk.js | 3 ++ ...js.LICENSE => 2.3e36c635.chunk.js.LICENSE} | 18 +++++------ ...1.chunk.js.map => 2.3e36c635.chunk.js.map} | 2 +- php/react/static/js/2.54356701.chunk.js | 3 -- php/react/static/js/main.56e05b03.chunk.js | 2 -- .../static/js/main.56e05b03.chunk.js.map | 1 - php/react/static/js/main.b0b97791.chunk.js | 2 ++ .../static/js/main.b0b97791.chunk.js.map | 1 + spa-react/package.json | 2 +- 14 files changed, 57 insertions(+), 57 deletions(-) delete mode 100644 php/react/precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js create mode 100644 php/react/precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js create mode 100644 php/react/static/js/2.3e36c635.chunk.js rename php/react/static/js/{2.54356701.chunk.js.LICENSE => 2.3e36c635.chunk.js.LICENSE} (100%) rename php/react/static/js/{2.54356701.chunk.js.map => 2.3e36c635.chunk.js.map} (73%) delete mode 100644 php/react/static/js/2.54356701.chunk.js delete mode 100644 php/react/static/js/main.56e05b03.chunk.js delete mode 100644 php/react/static/js/main.56e05b03.chunk.js.map create mode 100644 php/react/static/js/main.b0b97791.chunk.js create mode 100644 php/react/static/js/main.b0b97791.chunk.js.map diff --git a/php/react/asset-manifest.json b/php/react/asset-manifest.json index 4bedf90..207cc6a 100644 --- a/php/react/asset-manifest.json +++ b/php/react/asset-manifest.json @@ -1,25 +1,25 @@ { "files": { "main.css": "./static/css/main.629dc5cc.chunk.css", - "main.js": "./static/js/main.56e05b03.chunk.js", - "main.js.map": "./static/js/main.56e05b03.chunk.js.map", + "main.js": "./static/js/main.b0b97791.chunk.js", + "main.js.map": "./static/js/main.b0b97791.chunk.js.map", "runtime-main.js": "./static/js/runtime-main.f5e9acab.js", "runtime-main.js.map": "./static/js/runtime-main.f5e9acab.js.map", "static/css/2.764ccc25.chunk.css": "./static/css/2.764ccc25.chunk.css", - "static/js/2.54356701.chunk.js": "./static/js/2.54356701.chunk.js", - "static/js/2.54356701.chunk.js.map": "./static/js/2.54356701.chunk.js.map", + "static/js/2.3e36c635.chunk.js": "./static/js/2.3e36c635.chunk.js", + "static/js/2.3e36c635.chunk.js.map": "./static/js/2.3e36c635.chunk.js.map", "index.html": "./index.html", - "precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js": "./precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js", + "precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js": "./precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js", "service-worker.js": "./service-worker.js", "static/css/2.764ccc25.chunk.css.map": "./static/css/2.764ccc25.chunk.css.map", "static/css/main.629dc5cc.chunk.css.map": "./static/css/main.629dc5cc.chunk.css.map", - "static/js/2.54356701.chunk.js.LICENSE": "./static/js/2.54356701.chunk.js.LICENSE" + "static/js/2.3e36c635.chunk.js.LICENSE": "./static/js/2.3e36c635.chunk.js.LICENSE" }, "entrypoints": [ "static/js/runtime-main.f5e9acab.js", "static/css/2.764ccc25.chunk.css", - "static/js/2.54356701.chunk.js", + "static/js/2.3e36c635.chunk.js", "static/css/main.629dc5cc.chunk.css", - "static/js/main.56e05b03.chunk.js" + "static/js/main.b0b97791.chunk.js" ] } \ No newline at end of file diff --git a/php/react/index.html b/php/react/index.html index c31946f..7a1fea7 100644 --- a/php/react/index.html +++ b/php/react/index.html @@ -1 +1 @@ -Tasks
\ No newline at end of file +Tasks
\ No newline at end of file diff --git a/php/react/precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js b/php/react/precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js deleted file mode 100644 index 72ca715..0000000 --- a/php/react/precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js +++ /dev/null @@ -1,30 +0,0 @@ -self.__precacheManifest = (self.__precacheManifest || []).concat([ - { - "revision": "eb7b73a89f3446c26c95250bf982fc0b", - "url": "./index.html" - }, - { - "revision": "9e80264898a7d770f785", - "url": "./static/css/2.764ccc25.chunk.css" - }, - { - "revision": "6046a7118e2b308630b2", - "url": "./static/css/main.629dc5cc.chunk.css" - }, - { - "revision": "9e80264898a7d770f785", - "url": "./static/js/2.54356701.chunk.js" - }, - { - "revision": "07387c8408fbdbfbdecc0797f00eefd9", - "url": "./static/js/2.54356701.chunk.js.LICENSE" - }, - { - "revision": "6046a7118e2b308630b2", - "url": "./static/js/main.56e05b03.chunk.js" - }, - { - "revision": "43ae00e8c71e27ece866", - "url": "./static/js/runtime-main.f5e9acab.js" - } -]); \ No newline at end of file diff --git a/php/react/precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js b/php/react/precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js new file mode 100644 index 0000000..3a63d7f --- /dev/null +++ b/php/react/precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js @@ -0,0 +1,30 @@ +self.__precacheManifest = (self.__precacheManifest || []).concat([ + { + "revision": "5c2658977169e179602cc324c08b96b2", + "url": "./index.html" + }, + { + "revision": "906450e0ab0030bb2740", + "url": "./static/css/2.764ccc25.chunk.css" + }, + { + "revision": "2bbbcea50a10669f56e1", + "url": "./static/css/main.629dc5cc.chunk.css" + }, + { + "revision": "906450e0ab0030bb2740", + "url": "./static/js/2.3e36c635.chunk.js" + }, + { + "revision": "19bcc61eb74197a0e5e9d75bcef2c977", + "url": "./static/js/2.3e36c635.chunk.js.LICENSE" + }, + { + "revision": "2bbbcea50a10669f56e1", + "url": "./static/js/main.b0b97791.chunk.js" + }, + { + "revision": "43ae00e8c71e27ece866", + "url": "./static/js/runtime-main.f5e9acab.js" + } +]); \ No newline at end of file diff --git a/php/react/service-worker.js b/php/react/service-worker.js index c44cac4..723cb90 100644 --- a/php/react/service-worker.js +++ b/php/react/service-worker.js @@ -14,7 +14,7 @@ importScripts("https://storage.googleapis.com/workbox-cdn/releases/4.3.1/workbox-sw.js"); importScripts( - "./precache-manifest.9a88b51448b0eef5b302b92cf53039e4.js" + "./precache-manifest.ad7608aa14a5a0c6a5b8f2f91855b69f.js" ); self.addEventListener('message', (event) => { diff --git a/php/react/static/js/2.3e36c635.chunk.js b/php/react/static/js/2.3e36c635.chunk.js new file mode 100644 index 0000000..471f5d2 --- /dev/null +++ b/php/react/static/js/2.3e36c635.chunk.js @@ -0,0 +1,3 @@ +/*! 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n=m.calendarContainer.parentNode;if(n.lastChild&&n.removeChild(n.lastChild),n.parentNode){for(;n.firstChild;)n.parentNode.insertBefore(n.firstChild,n);n.parentNode.removeChild(n)}}else m.calendarContainer.parentNode.removeChild(m.calendarContainer);m.altInput&&(m.input.type="text",m.altInput.parentNode&&m.altInput.parentNode.removeChild(m.altInput),delete 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n=m.isOpen;m.isOpen=!0,n||(m.calendarContainer.classList.add("open"),m._input.classList.add("active"),pe("onOpen"),se(t)),!0===m.config.enableTime&&!0===m.config.noCalendar&&(0===m.selectedDates.length&&ie(),!1!==m.config.allowInput||void 0!==e&&m.timeContainer.contains(e.relatedTarget)||setTimeout((function(){return m.hourElement.select()}),50))}},m.redraw=le,m.set=function(e,n){if(null!==e&&"object"===typeof e)for(var r in Object.assign(m.config,e),e)void 0!==fe[r]&&fe[r].forEach((function(e){return e()}));else m.config[e]=n,void 0!==fe[e]?fe[e].forEach((function(e){return e()})):t.indexOf(e)>-1&&(m.config[e]=s(n));m.redraw(),be(!1)},m.setDate=function(e,t,n){if(void 0===t&&(t=!1),void 0===n&&(n=m.config.dateFormat),0!==e&&!e||e instanceof Array&&0===e.length)return 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0!==m.config[e]})).forEach((function(e){m.config[e]=s(m.config[e]||[]).map(x)})),m.isMobile=!m.config.disableMobile&&!m.config.inline&&"single"===m.config.mode&&!m.config.disable.length&&!m.config.enable.length&&!m.config.weekNumbers&&/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent),f=0;f<m.config.plugins.length;f++){var h=m.config.plugins[f](m)||{};for(var v in h)t.indexOf(v)>-1?m.config[v]=s(h[v]).map(x).concat(m.config[v]):"undefined"===typeof i[v]&&(m.config[v]=h[v])}pe("onParseConfig")}(),ae(),m.input=m.config.wrap?d.querySelector("[data-input]"):d,m.input?(m.input._type=m.input.type,m.input.type="text",m.input.classList.add("flatpickr-input"),m._input=m.input,m.config.altInput&&(m.altInput=u(m.input.nodeName,m.config.altInputClass),m._input=m.altInput,m.altInput.placeholder=m.input.placeholder,m.altInput.disabled=m.input.disabled,m.altInput.required=m.input.required,m.altInput.tabIndex=m.input.tabIndex,m.altInput.type="text",m.input.setAttribute("type","hidden"),!m.config.static&&m.input.parentNode&&m.input.parentNode.insertBefore(m.altInput,m.input.nextSibling)),m.config.allowInput||m._input.setAttribute("readonly","readonly"),m._positionElement=m.config.positionElement||m._input):m.config.errorHandler(new Error("Invalid input element specified")),function(){m.selectedDates=[],m.now=m.parseDate(m.config.now)||new Date;var e=m.config.defaultDate||("INPUT"!==m.input.nodeName&&"TEXTAREA"!==m.input.nodeName||!m.input.placeholder||m.input.value!==m.input.placeholder?m.input.value:null);e&&de(e,m.config.dateFormat),m._initialDate=m.selectedDates.length>0?m.selectedDates[0]:m.config.minDate&&m.config.minDate.getTime()>m.now.getTime()?m.config.minDate:m.config.maxDate&&m.config.maxDate.getTime()<m.now.getTime()?m.config.maxDate:m.now,m.currentYear=m._initialDate.getFullYear(),m.currentMonth=m._initialDate.getMonth(),m.selectedDates.length>0&&(m.latestSelectedDateObj=m.selectedDates[0]),void 0!==m.config.minTime&&(m.config.minTime=m.parseDate(m.config.minTime,"H:i")),void 0!==m.config.maxTime&&(m.config.maxTime=m.parseDate(m.config.maxTime,"H:i")),m.minDateHasTime=!!m.config.minDate&&(m.config.minDate.getHours()>0||m.config.minDate.getMinutes()>0||m.config.minDate.getSeconds()>0),m.maxDateHasTime=!!m.config.maxDate&&(m.config.maxDate.getHours()>0||m.config.maxDate.getMinutes()>0||m.config.maxDate.getSeconds()>0),Object.defineProperty(m,"showTimeInput",{get:function(){return m._showTimeInput},set:function(e){m._showTimeInput=e,m.calendarContainer&&l(m.calendarContainer,"showTimeInput",e),m.isOpen&&se()}})}(),m.utils={getDaysInMonth:function(e,t){return void 0===e&&(e=m.currentMonth),void 0===t&&(t=m.currentYear),1===e&&(t%4===0&&t%100!==0||t%400===0)?29:m.l10n.daysInMonth[e]}},m.isMobile||function(){var e=window.document.createDocumentFragment();if(m.calendarContainer=u("div","flatpickr-calendar"),m.calendarContainer.tabIndex=-1,!m.config.noCalendar){if(e.appendChild((m.monthNav=u("div","flatpickr-months"),m.yearElements=[],m.monthElements=[],m.prevMonthNav=u("span","flatpickr-prev-month"),m.prevMonthNav.innerHTML=m.config.prevArrow,m.nextMonthNav=u("span","flatpickr-next-month"),m.nextMonthNav.innerHTML=m.config.nextArrow,Y(),Object.defineProperty(m,"_hidePrevMonthArrow",{get:function(){return m.__hidePrevMonthArrow},set:function(e){m.__hidePrevMonthArrow!==e&&(l(m.prevMonthNav,"flatpickr-disabled",e),m.__hidePrevMonthArrow=e)}}),Object.defineProperty(m,"_hideNextMonthArrow",{get:function(){return m.__hideNextMonthArrow},set:function(e){m.__hideNextMonthArrow!==e&&(l(m.nextMonthNav,"flatpickr-disabled",e),m.__hideNextMonthArrow=e)}}),m.currentYearElement=m.yearElements[0],ge(),m.monthNav)),m.innerContainer=u("div","flatpickr-innerContainer"),m.config.weekNumbers){var t=function(){m.calendarContainer.classList.add("hasWeeks");var e=u("div","flatpickr-weekwrapper");e.appendChild(u("span","flatpickr-weekday",m.l10n.weekAbbreviation));var t=u("div","flatpickr-weeks");return e.appendChild(t),{weekWrapper:e,weekNumbers:t}}(),n=t.weekWrapper,r=t.weekNumbers;m.innerContainer.appendChild(n),m.weekNumbers=r,m.weekWrapper=n}m.rContainer=u("div","flatpickr-rContainer"),m.rContainer.appendChild($()),m.daysContainer||(m.daysContainer=u("div","flatpickr-days"),m.daysContainer.tabIndex=-1),H(),m.rContainer.appendChild(m.daysContainer),m.innerContainer.appendChild(m.rContainer),e.appendChild(m.innerContainer)}m.config.enableTime&&e.appendChild(function(){m.calendarContainer.classList.add("hasTime"),m.config.noCalendar&&m.calendarContainer.classList.add("noCalendar"),m.timeContainer=u("div","flatpickr-time"),m.timeContainer.tabIndex=-1;var e=u("span","flatpickr-time-separator",":"),t=f("flatpickr-hour",{"aria-label":m.l10n.hourAriaLabel});m.hourElement=t.getElementsByTagName("input")[0];var n=f("flatpickr-minute",{"aria-label":m.l10n.minuteAriaLabel});if(m.minuteElement=n.getElementsByTagName("input")[0],m.hourElement.tabIndex=m.minuteElement.tabIndex=-1,m.hourElement.value=i(m.latestSelectedDateObj?m.latestSelectedDateObj.getHours():m.config.time_24hr?m.config.defaultHour:function(e){switch(e%24){case 0:case 12:return 12;default:return e%12}}(m.config.defaultHour)),m.minuteElement.value=i(m.latestSelectedDateObj?m.latestSelectedDateObj.getMinutes():m.config.defaultMinute),m.hourElement.setAttribute("step",m.config.hourIncrement.toString()),m.minuteElement.setAttribute("step",m.config.minuteIncrement.toString()),m.hourElement.setAttribute("min",m.config.time_24hr?"0":"1"),m.hourElement.setAttribute("max",m.config.time_24hr?"23":"12"),m.minuteElement.setAttribute("min","0"),m.minuteElement.setAttribute("max","59"),m.timeContainer.appendChild(t),m.timeContainer.appendChild(e),m.timeContainer.appendChild(n),m.config.time_24hr&&m.timeContainer.classList.add("time24hr"),m.config.enableSeconds){m.timeContainer.classList.add("hasSeconds");var 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.ck-media__placeholder__url__text{color:var(--ck-color-media-embed-placeholder-url-text);white-space:nowrap;text-align:center;font-style:italic;text-overflow:ellipsis}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:var(--ck-color-media-embed-placeholder-url-text-hover);cursor:pointer;text-decoration:underline}.ck-media__wrapper[data-oembed-url*="open.spotify.com"]{max-width:300px;max-height:380px}.ck-media__wrapper[data-oembed-url*="google.com/maps"] 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.ck-media__placeholder .ck-media__placeholder__url__text{color:#ffe0fe}.ck-media__wrapper[data-oembed-url*="instagram.com"] .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}.ck-media__wrapper[data-oembed-url*="twitter.com"] .ck.ck-media__placeholder{background:linear-gradient(90deg,#71c6f4,#0d70a5)}.ck-media__wrapper[data-oembed-url*="twitter.com"] .ck.ck-media__placeholder 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a=this.boundaries.start.offset;o=(i=new Jt(e,a,e.data.length-a)).data.length,t=Nn._createBefore(i)}else i=new Jt(e,0,e.data.length),t.offset--;return this.position=t,this._formatReturnValue("text",i,n,t,o)}if("string"==typeof e){var s;if(this.singleCharacters)s=1;else{var l=r===this._boundaryStartParent?this.boundaries.start.offset:0;s=t.offset-l}t.offset-=s;var u=new Jt(r,t.offset,s);return this.position=t,this._formatReturnValue("text",u,n,t,s)}return t=Nn._createBefore(r),this.position=t,this._formatReturnValue("elementStart",r,n,t,1)}},{key:"_formatReturnValue",value:function(e,t,n,r,i){return t instanceof Jt&&(t.offsetInText+t.data.length==t.textNode.data.length&&("forward"!=this.direction||this.boundaries&&this.boundaries.end.isEqual(this.position)?n=Nn._createAfter(t.textNode):(r=Nn._createAfter(t.textNode),this.position=r)),0===t.offsetInText&&("backward"!=this.direction||this.boundaries&&this.boundaries.start.isEqual(this.position)?n=Nn._createBefore(t.textNode):(r=Nn._createBefore(t.textNode),this.position=r))),{done:!1,value:{type:e,item:t,previousPosition:n,nextPosition:r,length:i}}}}]),e}(),Nn=function(){function e(t,n){f(this,e),this.parent=t,this.offset=n}return d(e,[{key:"getShiftedBy",value:function(t){var n=e._createAt(this),r=n.offset+t;return n.offset=r<0?0:r,n}},{key:"getLastMatchingPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t.startPosition=this;var n=new On(t);return n.skip(e),n.position}},{key:"getAncestors",value:function(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}},{key:"getCommonAncestor",value:function(e){for(var t=this.getAncestors(),n=e.getAncestors(),r=0;t[r]==n[r]&&t[r];)r++;return 0===r?null:t[r-1]}},{key:"is",value:function(e){return"position"==e||"view:position"==e}},{key:"isEqual",value:function(e){return this.parent==e.parent&&this.offset==e.offset}},{key:"isBefore",value:function(e){return"before"==this.compareWith(e)}},{key:"isAfter",value:function(e){return"after"==this.compareWith(e)}},{key:"compareWith",value:function(e){if(this.root!==e.root)return"different";if(this.isEqual(e))return"same";var t=this.parent.is("node")?this.parent.getPath():[],n=e.parent.is("node")?e.parent.getPath():[];t.push(this.offset),n.push(e.offset);var r=$t(t,n);switch(r){case"prefix":return"before";case"extension":return"after";default:return t[r]<n[r]?"before":"after"}}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.startPosition=this,new On(e)}},{key:"clone",value:function(){return new e(this.parent,this.offset)}},{key:"nodeAfter",get:function(){return this.parent.is("text")?null:this.parent.getChild(this.offset)||null}},{key:"nodeBefore",get:function(){return this.parent.is("text")?null:this.parent.getChild(this.offset-1)||null}},{key:"isAtStart",get:function(){return 0===this.offset}},{key:"isAtEnd",get:function(){var e=this.parent.is("text")?this.parent.data.length:this.parent.childCount;return this.offset===e}},{key:"root",get:function(){return this.parent.root}},{key:"editableElement",get:function(){for(var e=this.parent;!(e instanceof An);){if(!e.parent)return null;e=e.parent}return e}}],[{key:"_createAt",value:function(t,n){if(t instanceof e)return new this(t.parent,t.offset);var r=t;if("end"==n)n=r.is("text")?r.data.length:r.childCount;else{if("before"==n)return this._createBefore(r);if("after"==n)return this._createAfter(r);if(0!==n&&!n)throw new It.b("view-createPositionAt-offset-required: View#createPositionAt() requires the offset when the first parameter is a view item.",r)}return new e(r,n)}},{key:"_createAfter",value:function(t){if(t.is("textProxy"))return new e(t.textNode,t.offsetInText+t.data.length);if(!t.parent)throw new It.b("view-position-after-root: You can not make position after root.",t,{root:t});return new e(t.parent,t.index+1)}},{key:"_createBefore",value:function(t){if(t.is("textProxy"))return new e(t.textNode,t.offsetInText);if(!t.parent)throw new It.b("view-position-before-root: You can not make position before root.",t,{root:t});return new e(t.parent,t.index)}}]),e}(),In=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null;f(this,e),this.start=t.clone(),this.end=n?n.clone():t.clone()}return d(e,[{key:Symbol.iterator,value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(new On({boundaries:this,ignoreElementEnd:!0}),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"getEnlarged",value:function(){var t=this.start.getLastMatchingPosition(Dn,{direction:"backward"}),n=this.end.getLastMatchingPosition(Dn);return t.parent.is("text")&&t.isAtStart&&(t=Nn._createBefore(t.parent)),n.parent.is("text")&&n.isAtEnd&&(n=Nn._createAfter(n.parent)),new e(t,n)}},{key:"getTrimmed",value:function(){var t=this.start.getLastMatchingPosition(Dn);if(t.isAfter(this.end)||t.isEqual(this.end))return new e(t,t);var n=this.end.getLastMatchingPosition(Dn,{direction:"backward"}),r=t.nodeAfter,i=n.nodeBefore;return r&&r.is("text")&&(t=new Nn(r,0)),i&&i.is("text")&&(n=new Nn(i,i.data.length)),new e(t,n)}},{key:"isEqual",value:function(e){return this==e||this.start.isEqual(e.start)&&this.end.isEqual(e.end)}},{key:"containsPosition",value:function(e){return e.isAfter(this.start)&&e.isBefore(this.end)}},{key:"containsRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e.isCollapsed&&(t=!1);var n=this.containsPosition(e.start)||t&&this.start.isEqual(e.start),r=this.containsPosition(e.end)||t&&this.end.isEqual(e.end);return n&&r}},{key:"getDifference",value:function(t){var n=[];return this.isIntersecting(t)?(this.containsPosition(t.start)&&n.push(new e(this.start,t.start)),this.containsPosition(t.end)&&n.push(new e(t.end,this.end))):n.push(this.clone()),n}},{key:"getIntersection",value:function(t){if(this.isIntersecting(t)){var n=this.start,r=this.end;return this.containsPosition(t.start)&&(n=t.start),this.containsPosition(t.end)&&(r=t.end),new e(n,r)}return null}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.boundaries=this,new On(e)}},{key:"getCommonAncestor",value:function(){return this.start.getCommonAncestor(this.end)}},{key:"clone",value:function(){return new e(this.start,this.end)}},{key:"getItems",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,t.ignoreElementEnd=!0,n=new On(t),r=!0,i=!1,o=void 0,e.prev=6,a=n[Symbol.iterator]();case 8:if(r=(l=a.next()).done){e.next=15;break}return u=l.value,e.next=12,u.item;case 12:r=!0,e.next=8;break;case 15:e.next=21;break;case 17:e.prev=17,e.t0=e.catch(6),i=!0,o=e.t0;case 21:e.prev=21,e.prev=22,r||null==a.return||a.return();case 24:if(e.prev=24,!i){e.next=27;break}throw o;case 27:return e.finish(24);case 28:return e.finish(21);case 29:case"end":return e.stop()}}),e,this,[[6,17,21,29],[22,,24,28]])}))},{key:"getPositions",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,n=new On(t),e.next=5,n.position;case 5:r=!0,i=!1,o=void 0,e.prev=8,a=n[Symbol.iterator]();case 10:if(r=(l=a.next()).done){e.next=17;break}return u=l.value,e.next=14,u.nextPosition;case 14:r=!0,e.next=10;break;case 17:e.next=23;break;case 19:e.prev=19,e.t0=e.catch(8),i=!0,o=e.t0;case 23:e.prev=23,e.prev=24,r||null==a.return||a.return();case 26:if(e.prev=26,!i){e.next=29;break}throw o;case 29:return e.finish(26);case 30:return e.finish(23);case 31:case"end":return e.stop()}}),e,this,[[8,19,23,31],[24,,26,30]])}))},{key:"is",value:function(e){return"range"==e||"view:range"==e}},{key:"isIntersecting",value:function(e){return this.start.isBefore(e.end)&&this.end.isAfter(e.start)}},{key:"isCollapsed",get:function(){return this.start.isEqual(this.end)}},{key:"isFlat",get:function(){return this.start.parent===this.end.parent}},{key:"root",get:function(){return this.start.root}}],[{key:"_createFromParentsAndOffsets",value:function(e,t,n,r){return new this(new Nn(e,t),new Nn(n,r))}},{key:"_createFromPositionAndShift",value:function(e,t){var n=e,r=e.getShiftedBy(t);return t>0?new this(n,r):new this(r,n)}},{key:"_createIn",value:function(e){return this._createFromParentsAndOffsets(e,0,e,e.childCount)}},{key:"_createOn",value:function(e){var t=e.is("textProxy")?e.offsetSize:1;return this._createFromPositionAndShift(Nn._createBefore(e),t)}}]),e}();function Dn(e){return!(!e.item.is("attributeElement")&&!e.item.is("uiElement"))}function Rn(e){var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0)o.value,t++}catch(s){r=!0,i=s}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}var jn=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,n=arguments.length>1?arguments[1]:void 0,r=arguments.length>2?arguments[2]:void 0;f(this,e),this._ranges=[],this._lastRangeBackward=!1,this._isFake=!1,this._fakeSelectionLabel="",this.setTo(t,n,r)}return d(e,[{key:"getRanges",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._ranges[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,a.clone();case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"getFirstRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.start.isBefore(e.start)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?e.clone():null}},{key:"getLastRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.end.isAfter(e.end)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?e.clone():null}},{key:"getFirstPosition",value:function(){var e=this.getFirstRange();return e?e.start.clone():null}},{key:"getLastPosition",value:function(){var e=this.getLastRange();return e?e.end.clone():null}},{key:"isEqual",value:function(e){if(this.isFake!=e.isFake)return!1;if(this.isFake&&this.fakeSelectionLabel!=e.fakeSelectionLabel)return!1;if(this.rangeCount!=e.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(e.anchor)||!this.focus.isEqual(e.focus))return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=!1,l=!0,u=!1,c=void 0;try{for(var f,d=e._ranges[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(a.isEqual(h)){s=!0;break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}if(!s)return!1}}catch(p){n=!0,r=p}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}},{key:"isSimilar",value:function(e){if(this.isBackward!=e.isBackward)return!1;var t=Rn(this.getRanges());if(t!=Rn(e.getRanges()))return!1;if(0==t)return!0;var n=!0,r=!1,i=void 0;try{for(var o,a=this.getRanges()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s=s.getTrimmed();var l=!1,u=!0,c=!1,f=void 0;try{for(var d,h=e.getRanges()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;if(p=p.getTrimmed(),s.start.isEqual(p.start)&&s.end.isEqual(p.end)){l=!0;break}}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}if(!l)return!1}}catch(v){r=!0,i=v}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return!0}},{key:"getSelectedElement",value:function(){if(1!==this.rangeCount)return null;var e=this.getFirstRange(),t=e.start.nodeAfter,n=e.end.nodeBefore;return e.start.parent.is("text")&&e.start.isAtEnd&&e.start.parent.nextSibling&&(t=e.start.parent.nextSibling),e.end.parent.is("text")&&e.end.isAtStart&&e.end.parent.previousSibling&&(n=e.end.parent.previousSibling),t instanceof nn&&t==n?t:null}},{key:"setTo",value:function(t,n,r){if(null===t)this._setRanges([]),this._setFakeOptions(n);else if(t instanceof e||t instanceof Ln)this._setRanges(t.getRanges(),t.isBackward),this._setFakeOptions({fake:t.isFake,label:t.fakeSelectionLabel});else if(t instanceof In)this._setRanges([t],n&&n.backward),this._setFakeOptions(n);else if(t instanceof Nn)this._setRanges([new In(t)]),this._setFakeOptions(n);else if(t instanceof Qt){var i,o=!!r&&!!r.backward;if(void 0===n)throw new It.b("view-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",this);i="in"==n?In._createIn(t):"on"==n?In._createOn(t):new In(Nn._createAt(t,n)),this._setRanges([i],o),this._setFakeOptions(r)}else{if(!Zt(t))throw new It.b("view-selection-setTo-not-selectable: Cannot set selection to given place.",this);this._setRanges(t,n&&n.backward),this._setFakeOptions(n)}this.fire("change")}},{key:"setFocus",value:function(e,t){if(null===this.anchor)throw new It.b("view-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",this);var n=Nn._createAt(e,t);if("same"!=n.compareWith(this.focus)){var r=this.anchor;this._ranges.pop(),"before"==n.compareWith(r)?this._addRange(new In(n,r),!0):this._addRange(new In(r,n)),this.fire("change")}}},{key:"is",value:function(e){return"selection"==e||"view:selection"==e}},{key:"_setRanges",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e=Array.from(e),this._ranges=[];var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._addRange(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._lastRangeBackward=!!t}},{key:"_setFakeOptions",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};this._isFake=!!e.fake,this._fakeSelectionLabel=e.fake&&e.label||""}},{key:"_addRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];if(!(e instanceof In))throw new It.b("view-selection-add-range-not-range: Selection range set to an object that is not an instance of view.Range",this);this._pushRange(e),this._lastRangeBackward=!!t}},{key:"_pushRange",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(e.isIntersecting(a))throw new It.b("view-selection-range-intersects: Trying to add a range that intersects with another range from selection.",this,{addedRange:e,intersectingRange:a})}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._ranges.push(new In(e.start,e.end))}},{key:"isFake",get:function(){return this._isFake}},{key:"fakeSelectionLabel",get:function(){return this._fakeSelectionLabel}},{key:"anchor",get:function(){if(!this._ranges.length)return null;var e=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?e.end:e.start).clone()}},{key:"focus",get:function(){if(!this._ranges.length)return null;var e=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?e.start:e.end).clone()}},{key:"isCollapsed",get:function(){return 1===this.rangeCount&&this._ranges[0].isCollapsed}},{key:"rangeCount",get:function(){return this._ranges.length}},{key:"isBackward",get:function(){return!this.isCollapsed&&this._lastRangeBackward}},{key:"editableElement",get:function(){return this.anchor?this.anchor.editableElement:null}}]),e}();Yt(jn,zt);var Ln=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,n=arguments.length>1?arguments[1]:void 0,r=arguments.length>2?arguments[2]:void 0;f(this,e),this._selection=new jn,this._selection.delegate("change").to(this),this._selection.setTo(t,n,r)}return d(e,[{key:"getRanges",value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(this._selection.getRanges(),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"getFirstRange",value:function(){return this._selection.getFirstRange()}},{key:"getLastRange",value:function(){return this._selection.getLastRange()}},{key:"getFirstPosition",value:function(){return this._selection.getFirstPosition()}},{key:"getLastPosition",value:function(){return this._selection.getLastPosition()}},{key:"getSelectedElement",value:function(){return this._selection.getSelectedElement()}},{key:"isEqual",value:function(e){return this._selection.isEqual(e)}},{key:"isSimilar",value:function(e){return this._selection.isSimilar(e)}},{key:"is",value:function(e){return"selection"==e||"documentSelection"==e||"view:selection"==e||"view:documentSelection"==e}},{key:"_setTo",value:function(e,t,n){this._selection.setTo(e,t,n)}},{key:"_setFocus",value:function(e,t){this._selection.setFocus(e,t)}},{key:"isFake",get:function(){return this._selection.isFake}},{key:"fakeSelectionLabel",get:function(){return this._selection.fakeSelectionLabel}},{key:"anchor",get:function(){return this._selection.anchor}},{key:"focus",get:function(){return this._selection.focus}},{key:"isCollapsed",get:function(){return this._selection.isCollapsed}},{key:"rangeCount",get:function(){return this._selection.rangeCount}},{key:"isBackward",get:function(){return this._selection.isBackward}},{key:"editableElement",get:function(){return this._selection.editableElement}},{key:"_ranges",get:function(){return this._selection._ranges}}]),e}();Yt(Ln,zt);var Fn=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this._items=[],this._itemMap=new Map,this._idProperty=t.idProperty||"id",this._bindToExternalToInternalMap=new WeakMap,this._bindToInternalToExternalMap=new WeakMap,this._skippedIndexesFromExternal=[]}return d(e,[{key:"add",value:function(e,t){var n,r=this._idProperty;if(r in e){if("string"!=typeof(n=e[r]))throw new It.b("collection-add-invalid-id",this);if(this.get(n))throw new It.b("collection-add-item-already-exists",this)}else e[r]=n=Rt();if(void 0===t)t=this._items.length;else if(t>this._items.length||t<0)throw new It.b("collection-add-item-invalid-index",this);return this._items.splice(t,0,e),this._itemMap.set(n,e),this.fire("add",e,t),this}},{key:"get",value:function(e){var t;if("string"==typeof e)t=this._itemMap.get(e);else{if("number"!=typeof e)throw new It.b("collection-get-invalid-arg: Index or id must be given.",this);t=this._items[e]}return t||null}},{key:"has",value:function(e){if("string"==typeof e)return this._itemMap.has(e);var t=e[this._idProperty];return this._itemMap.has(t)}},{key:"getIndex",value:function(e){var t;return t="string"==typeof e?this._itemMap.get(e):e,this._items.indexOf(t)}},{key:"remove",value:function(e){var t,n,r,i=!1,o=this._idProperty;if("string"==typeof e?(n=e,i=!(r=this._itemMap.get(n)),r&&(t=this._items.indexOf(r))):"number"==typeof e?(t=e,i=!(r=this._items[t]),r&&(n=r[o])):(n=(r=e)[o],i=-1==(t=this._items.indexOf(r))||!this._itemMap.get(n)),i)throw new It.b("collection-remove-404: Item not found.",this);this._items.splice(t,1),this._itemMap.delete(n);var a=this._bindToInternalToExternalMap.get(r);return this._bindToInternalToExternalMap.delete(r),this._bindToExternalToInternalMap.delete(a),this.fire("remove",r,t),r}},{key:"map",value:function(e,t){return this._items.map(e,t)}},{key:"find",value:function(e,t){return this._items.find(e,t)}},{key:"filter",value:function(e,t){return this._items.filter(e,t)}},{key:"clear",value:function(){for(this._bindToCollection&&(this.stopListening(this._bindToCollection),this._bindToCollection=null);this.length;)this.remove(0)}},{key:"bindTo",value:function(e){var t=this;if(this._bindToCollection)throw new It.b("collection-bind-to-rebind: The collection cannot be bound more than once.",this);return this._bindToCollection=e,{as:function(e){t._setUpBindToBinding((function(t){return new e(t)}))},using:function(e){"function"==typeof e?t._setUpBindToBinding((function(t){return e(t)})):t._setUpBindToBinding((function(t){return t[e]}))}}}},{key:"_setUpBindToBinding",value:function(e){var t=this,n=this._bindToCollection,r=function(r,i,o){var a=n._bindToCollection==t,s=n._bindToInternalToExternalMap.get(i);if(a&&s)t._bindToExternalToInternalMap.set(i,s),t._bindToInternalToExternalMap.set(s,i);else{var l=e(i);if(!l)return void t._skippedIndexesFromExternal.push(o);var u=o,c=!0,f=!1,d=void 0;try{for(var h,p=t._skippedIndexesFromExternal[Symbol.iterator]();!(c=(h=p.next()).done);c=!0)o>h.value&&u--}catch(w){f=!0,d=w}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}var v=!0,m=!1,g=void 0;try{for(var y,b=n._skippedIndexesFromExternal[Symbol.iterator]();!(v=(y=b.next()).done);v=!0)u>=y.value&&u++}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}t._bindToExternalToInternalMap.set(i,l),t._bindToInternalToExternalMap.set(l,i),t.add(l,u);for(var k=0;k<n._skippedIndexesFromExternal.length;k++)u<=n._skippedIndexesFromExternal[k]&&n._skippedIndexesFromExternal[k]++}},i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r(0,u,n.getIndex(u))}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}this.listenTo(n,"add",r),this.listenTo(n,"remove",(function(e,n,r){var i=t._bindToExternalToInternalMap.get(n);i&&t.remove(i),t._skippedIndexesFromExternal=t._skippedIndexesFromExternal.reduce((function(e,t){return r<t&&e.push(t-1),r>t&&e.push(t),e}),[])}))}},{key:Symbol.iterator,value:function(){return this._items[Symbol.iterator]()}},{key:"length",get:function(){return this._items.length}},{key:"first",get:function(){return this._items[0]||null}},{key:"last",get:function(){return this._items[this.length-1]||null}}]),e}();Yt(Fn,zt);var zn=function(){function e(){f(this,e),this.selection=new Ln,this.roots=new Fn({idProperty:"rootName"}),this.set("isReadOnly",!1),this.set("isFocused",!1),this.set("isComposing",!1),this._postFixers=new Set}return d(e,[{key:"getRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.roots.get(e)}},{key:"registerPostFixer",value:function(e){this._postFixers.add(e)}},{key:"destroy",value:function(){this.roots.map((function(e){return e.destroy()})),this.stopListening()}},{key:"_callPostFixers",value:function(e){var t=!1;do{var n=!0,r=!1,i=void 0;try{for(var o,a=this._postFixers[Symbol.iterator]();!(n=(o=a.next()).done)&&!(t=(0,o.value)(e));n=!0);}catch(s){r=!0,i=s}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}while(t)}}]),e}();Yt(zn,wn);var Vn=10,Bn=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,e,n,r))).getFillerOffset=Un,i._priority=Vn,i._id=null,i._clonesGroup=null,i}return v(t,e),d(t,[{key:"getElementsWithSameId",value:function(){if(null===this.id)throw new It.b("attribute-element-get-elements-with-same-id-no-id: Cannot get elements with the same id for an attribute element without id.",this);return new Set(this._clonesGroup)}},{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e&&e.replace(/^view:/,"");return 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s=o.value;t.setAttribute(s,this.getAttribute(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}}]),t}(nn);function nr(){return null}var rr=function(){function e(t){f(this,e),this._children=[],t&&this._insertChild(0,t)}return d(e,[{key:Symbol.iterator,value:function(){return this._children[Symbol.iterator]()}},{key:"is",value:function(e){return"documentFragment"==e||"view:documentFragment"==e}},{key:"_appendChild",value:function(e){return this._insertChild(this.childCount,e)}},{key:"getChild",value:function(e){return this._children[e]}},{key:"getChildIndex",value:function(e){return this._children.indexOf(e)}},{key:"getChildren",value:function(){return this._children[Symbol.iterator]()}},{key:"_insertChild",value:function(e,t){this._fireChange("children",this);var n=0,r=function(e){return"string"==typeof e?[new Kt(e)]:(Zt(e)||(e=[e]),Array.from(e).map((function(e){return"string"==typeof e?new Kt(e):e instanceof Jt?new Kt(e.data):e})))}(t),i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;null!==u.parent&&u._remove(),u.parent=this,this._children.splice(e,0,u),e++,n++}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return n}},{key:"_removeChildren",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1;this._fireChange("children",this);for(var n=e;n<e+t;n++)this._children[n].parent=null;return this._children.splice(e,t)}},{key:"_fireChange",value:function(e,t){this.fire("change:"+e,t)}},{key:"childCount",get:function(){return this._children.length}},{key:"isEmpty",get:function(){return 0===this.childCount}},{key:"root",get:function(){return this}},{key:"parent",get:function(){return null}}]),e}();Yt(rr,zt);var ir=function(){function e(t){f(this,e),this.document=t,this._cloneGroups=new Map}return d(e,[{key:"setSelection",value:function(e,t,n){this.document.selection._setTo(e,t,n)}},{key:"setSelectionFocus",value:function(e,t){this.document.selection._setFocus(e,t)}},{key:"createText",value:function(e){return new Kt(e)}},{key:"createAttributeElement",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=new Bn(e,t);return n.priority&&(r._priority=n.priority),n.id&&(r._id=n.id),r}},{key:"createContainerElement",value:function(e,t){return new an(e,t)}},{key:"createEditableElement",value:function(e,t){var n=new An(e,t);return n._document=this.document,n}},{key:"createEmptyElement",value:function(e,t){return new qn(e,t)}},{key:"createUIElement",value:function(e,t,n){var r=new tr(e,t);return n&&(r.render=n),r}},{key:"setAttribute",value:function(e,t,n){n._setAttribute(e,t)}},{key:"removeAttribute",value:function(e,t){t._removeAttribute(e)}},{key:"addClass",value:function(e,t){t._addClass(e)}},{key:"removeClass",value:function(e,t){t._removeClass(e)}},{key:"setStyle",value:function(e,t,n){R(e)&&void 0===n&&(n=t),n._setStyle(e,t)}},{key:"removeStyle",value:function(e,t){t._removeStyle(e)}},{key:"setCustomProperty",value:function(e,t,n){n._setCustomProperty(e,t)}},{key:"removeCustomProperty",value:function(e,t){return t._removeCustomProperty(e)}},{key:"breakAttributes",value:function(e){return e instanceof Nn?this._breakAttributes(e):this._breakAttributesRange(e)}},{key:"breakContainer",value:function(e){var t=e.parent;if(!t.is("containerElement"))throw new It.b("view-writer-break-non-container-element: Trying to break an element which is not a container element.",this.document);if(!t.parent)throw new It.b("view-writer-break-root: Trying to break root element.",this.document);if(e.isAtStart)return Nn._createBefore(t);if(!e.isAtEnd){var n=t._clone(!1);this.insert(Nn._createAfter(t),n);var r=new In(e,Nn._createAt(t,"end")),i=new Nn(n,0);this.move(r,i)}return Nn._createAfter(t)}},{key:"mergeAttributes",value:function(e){var t=e.offset,n=e.parent;if(n.is("text"))return e;if(n.is("attributeElement")&&0===n.childCount){var r=n.parent,i=n.index;return n._remove(),this._removeFromClonedElementsGroup(n),this.mergeAttributes(new Nn(r,i))}var o=n.getChild(t-1),a=n.getChild(t);if(!o||!a)return e;if(o.is("text")&&a.is("text"))return ur(o,a);if(o.is("attributeElement")&&a.is("attributeElement")&&o.isSimilar(a)){var s=o.childCount;return o._appendChild(a.getChildren()),a._remove(),this._removeFromClonedElementsGroup(a),this.mergeAttributes(new Nn(o,s))}return e}},{key:"mergeContainers",value:function(e){var t=e.nodeBefore,n=e.nodeAfter;if(!(t&&n&&t.is("containerElement")&&n.is("containerElement")))throw new It.b("view-writer-merge-containers-invalid-position: Element before and after given position cannot be merged.",this.document);var r=t.getChild(t.childCount-1),i=r instanceof Kt?Nn._createAt(r,"end"):Nn._createAt(t,"end");return this.move(In._createIn(n),Nn._createAt(t,"end")),this.remove(In._createOn(n)),i}},{key:"insert",value:function(e,t){!function e(t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=function(){var t=a.value;if(!cr.some((function(e){return t instanceof e})))throw new It.b("view-writer-insert-invalid-node",n);t.is("text")||e(t.getChildren(),n)},l=t[Symbol.iterator]();!(r=(a=l.next()).done);r=!0)s()}catch(u){i=!0,o=u}finally{try{r||null==l.return||l.return()}finally{if(i)throw o}}}(t=Zt(t)?u(t):[t],this.document);var n=or(e);if(!n)throw new It.b("view-writer-invalid-position-container",this.document);var r=this._breakAttributes(e,!0),i=n._insertChild(r.offset,t),o=!0,a=!1,s=void 0;try{for(var l,c=t[Symbol.iterator]();!(o=(l=c.next()).done);o=!0){var 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a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=l.item,c=void 0;if(u.is("element")&&t.isSimilar(u))c=In._createOn(u);else if(!l.nextPosition.isAfter(e.start)&&u.is("textProxy")){var f=u.getAncestors().find((function(e){return e.is("element")&&t.isSimilar(e)}));f&&(c=In._createIn(f))}c&&(c.end.isAfter(e.end)&&(c.end=e.end),c.start.isBefore(e.start)&&(c.start=e.start),this.remove(c))}}catch(d){i=!0,o=d}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}},{key:"move",value:function(e,t){var n;if(t.isAfter(e.end)){var r=(t=this._breakAttributes(t,!0)).parent,i=r.childCount;e=this._breakAttributesRange(e,!0),n=this.remove(e),t.offset+=r.childCount-i}else n=this.remove(e);return this.insert(t,n)}},{key:"wrap",value:function(e,t){if(!(t instanceof Bn))throw new It.b("view-writer-wrap-invalid-attribute",this.document);if(dr(e,this.document),e.isCollapsed){var n=e.start;n.parent.is("element")&&(i=n.parent,!Array.from(i.getChildren()).some((function(e){return!e.is("uiElement")})))&&(n=n.getLastMatchingPosition((function(e){return e.item.is("uiElement")}))),n=this._wrapPosition(n,t);var r=this.document.selection;return r.isCollapsed&&r.getFirstPosition().isEqual(e.start)&&this.setSelection(n),new In(n)}return this._wrapRange(e,t);var i}},{key:"unwrap",value:function(e,t){if(!(t instanceof Bn))throw new It.b("view-writer-unwrap-invalid-attribute",this.document);if(dr(e,this.document),e.isCollapsed)return e;var n=this._breakAttributesRange(e,!0),r=n.start,i=n.end,o=r.parent,a=this._unwrapChildren(o,r.offset,i.offset,t),s=this.mergeAttributes(a.start);s.isEqual(a.start)||a.end.offset--;var l=this.mergeAttributes(a.end);return new In(s,l)}},{key:"rename",value:function(e,t){var n=new an(e,t.getAttributes());return this.insert(Nn._createAfter(t),n),this.move(In._createIn(t),Nn._createAt(n,0)),this.remove(In._createOn(t)),n}},{key:"clearClonedElementsGroup",value:function(e){this._cloneGroups.delete(e)}},{key:"createPositionAt",value:function(e,t){return Nn._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return Nn._createAfter(e)}},{key:"createPositionBefore",value:function(e){return Nn._createBefore(e)}},{key:"createRange",value:function(e,t){return new In(e,t)}},{key:"createRangeOn",value:function(e){return In._createOn(e)}},{key:"createRangeIn",value:function(e){return In._createIn(e)}},{key:"createSelection",value:function(e,t,n){return new jn(e,t,n)}},{key:"_wrapChildren",value:function(e,t,n,r){for(var i=t,o=[];i<n;){var a=e.getChild(i),s=a.is("text"),l=a.is("attributeElement"),u=a.is("emptyElement"),c=a.is("uiElement");if(l&&this._wrapAttributeElement(r,a))o.push(new Nn(e,i));else if(s||u||c||l&&ar(r,a)){var f=r._clone();a._remove(),f._appendChild(a),e._insertChild(i,f),this._addToClonedElementsGroup(f),o.push(new Nn(e,i))}else l&&this._wrapChildren(a,0,a.childCount,r);i++}for(var d=0,h=0,p=o;h<p.length;h++){var v=p[h];v.offset-=d,v.offset!=t&&(this.mergeAttributes(v).isEqual(v)||(d++,n--))}return In._createFromParentsAndOffsets(e,t,e,n)}},{key:"_unwrapChildren",value:function(e,t,n,r){for(var i=t,o=[];i<n;){var a=e.getChild(i);if(a.is("attributeElement"))if(a.isSimilar(r)){var s=a.getChildren(),l=a.childCount;a._remove(),e._insertChild(i,s),this._removeFromClonedElementsGroup(a),o.push(new Nn(e,i),new Nn(e,i+l)),i+=l,n+=l-1}else this._unwrapAttributeElement(r,a)?(o.push(new Nn(e,i),new Nn(e,i+1)),i++):(this._unwrapChildren(a,0,a.childCount,r),i++);else i++}for(var u=0,c=0,f=o;c<f.length;c++){var d=f[c];d.offset-=u,d.offset!=t&&d.offset!=n&&(this.mergeAttributes(d).isEqual(d)||(u++,n--))}return In._createFromParentsAndOffsets(e,t,e,n)}},{key:"_wrapRange",value:function(e,t){var n=this._breakAttributesRange(e,!0),r=n.start,i=n.end,o=r.parent,a=this._wrapChildren(o,r.offset,i.offset,t),s=this.mergeAttributes(a.start);s.isEqual(a.start)||a.end.offset--;var l=this.mergeAttributes(a.end);return new In(s,l)}},{key:"_wrapPosition",value:function(e,t){if(t.isSimilar(e.parent))return sr(e.clone());e.parent.is("text")&&(e=lr(e));var n=this.createAttributeElement();n._priority=Number.POSITIVE_INFINITY,n.isSimilar=function(){return!1},e.parent._insertChild(e.offset,n);var r=new In(e,e.getShiftedBy(1));this.wrap(r,t);var i=new Nn(n.parent,n.index);n._remove();var o=i.nodeBefore,a=i.nodeAfter;return o instanceof Kt&&a instanceof Kt?ur(o,a):sr(i)}},{key:"_wrapAttributeElement",value:function(e,t){if(!hr(e,t))return!1;if(e.name!==t.name||e.priority!==t.priority)return!1;var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if("class"!==s&&"style"!==s&&t.hasAttribute(s)&&t.getAttribute(s)!==e.getAttribute(s))return!1}}catch(N){r=!0,i=N}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}var l=!0,u=!1,c=void 0;try{for(var f,d=e.getStyleNames()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(t.hasStyle(h)&&t.getStyle(h)!==e.getStyle(h))return!1}}catch(N){u=!0,c=N}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}var p=!0,v=!1,m=void 0;try{for(var g,y=e.getAttributeKeys()[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var b=g.value;"class"!==b&&"style"!==b&&(t.hasAttribute(b)||this.setAttribute(b,e.getAttribute(b),t))}}catch(N){v=!0,m=N}finally{try{p||null==y.return||y.return()}finally{if(v)throw m}}var k=!0,w=!1,_=void 0;try{for(var x,T=e.getStyleNames()[Symbol.iterator]();!(k=(x=T.next()).done);k=!0){var C=x.value;t.hasStyle(C)||this.setStyle(C,e.getStyle(C),t)}}catch(N){w=!0,_=N}finally{try{k||null==T.return||T.return()}finally{if(w)throw _}}var S=!0,E=!1,A=void 0;try{for(var P,M=e.getClassNames()[Symbol.iterator]();!(S=(P=M.next()).done);S=!0){var O=P.value;t.hasClass(O)||this.addClass(O,t)}}catch(N){E=!0,A=N}finally{try{S||null==M.return||M.return()}finally{if(E)throw A}}return!0}},{key:"_unwrapAttributeElement",value:function(e,t){if(!hr(e,t))return!1;if(e.name!==t.name||e.priority!==t.priority)return!1;var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if("class"!==s&&"style"!==s&&(!t.hasAttribute(s)||t.getAttribute(s)!==e.getAttribute(s)))return!1}}catch(w){r=!0,i=w}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}if(!t.hasClass.apply(t,u(e.getClassNames())))return!1;var l=!0,c=!1,f=void 0;try{for(var d,h=e.getStyleNames()[Symbol.iterator]();!(l=(d=h.next()).done);l=!0){var p=d.value;if(!t.hasStyle(p)||t.getStyle(p)!==e.getStyle(p))return!1}}catch(w){c=!0,f=w}finally{try{l||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=e.getAttributeKeys()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;"class"!==k&&"style"!==k&&this.removeAttribute(k,t)}}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}return this.removeClass(Array.from(e.getClassNames()),t),this.removeStyle(Array.from(e.getStyleNames()),t),!0}},{key:"_breakAttributesRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.start,r=e.end;if(dr(e,this.document),e.isCollapsed){var i=this._breakAttributes(e.start,t);return new In(i,i)}var o=this._breakAttributes(r,t),a=o.parent.childCount,s=this._breakAttributes(n,t);return o.offset+=o.parent.childCount-a,new In(s,o)}},{key:"_breakAttributes",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.offset,r=e.parent;if(e.parent.is("emptyElement"))throw new It.b("view-writer-cannot-break-empty-element",this.document);if(e.parent.is("uiElement"))throw new It.b("view-writer-cannot-break-ui-element",this.document);if(!t&&r.is("text")&&fr(r.parent))return e.clone();if(fr(r))return e.clone();if(r.is("text"))return this._breakAttributes(lr(e),t);if(n==r.childCount){var i=new Nn(r.parent,r.index+1);return this._breakAttributes(i,t)}if(0===n){var o=new Nn(r.parent,r.index);return this._breakAttributes(o,t)}var a=r.index+1,s=r._clone();r.parent._insertChild(a,s),this._addToClonedElementsGroup(s);var l=r.childCount-n,u=r._removeChildren(n,l);s._appendChild(u);var c=new Nn(r.parent,a);return this._breakAttributes(c,t)}},{key:"_addToClonedElementsGroup",value:function(e){if(e.root.is("rootElement")){if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._addToClonedElementsGroup(a)}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}var s=e.id;if(s){var l=this._cloneGroups.get(s);l||(l=new Set,this._cloneGroups.set(s,l)),l.add(e),e._clonesGroup=l}}}},{key:"_removeFromClonedElementsGroup",value:function(e){if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._removeFromClonedElementsGroup(a)}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}var s=e.id;if(s){var l=this._cloneGroups.get(s);l&&l.delete(e)}}}]),e}();function or(e){for(var t=e.parent;!fr(t);){if(!t)return;t=t.parent}return t}function ar(e,t){return e.priority<t.priority||!(e.priority>t.priority)&&e.getIdentity()<t.getIdentity()}function sr(e){var t=e.nodeBefore;if(t&&t.is("text"))return new Nn(t,t.data.length);var n=e.nodeAfter;return n&&n.is("text")?new Nn(n,0):e}function lr(e){if(e.offset==e.parent.data.length)return new Nn(e.parent.parent,e.parent.index+1);if(0===e.offset)return new Nn(e.parent.parent,e.parent.index);var t=e.parent.data.slice(e.offset);return e.parent._data=e.parent.data.slice(0,e.offset),e.parent.parent._insertChild(e.parent.index+1,new Kt(t)),new Nn(e.parent.parent,e.parent.index+1)}function ur(e,t){var n=e.data.length;return e._data+=t.data,t._remove(),new Nn(e,n)}var cr=[Kt,Bn,an,qn,tr];function fr(e){return e&&(e.is("containerElement")||e.is("documentFragment"))}function dr(e,t){var n=or(e.start),r=or(e.end);if(!n||!r||n!==r)throw new It.b("view-writer-invalid-range-container",t)}function hr(e,t){return null===e.id&&null===t.id}function pr(e){return"[object Text]"==Object.prototype.toString.call(e)}var vr=function(e){return e.createTextNode("\xa0")},mr=function(e){var t=e.createElement("br");return t.dataset.ckeFiller=!0,t},gr=7,yr=function(){for(var e="",t=0;t<gr;t++)e+="\u200b";return e}();function br(e){return pr(e)&&e.data.substr(0,gr)===yr}function kr(e){return e.data.length==gr&&br(e)}function wr(e){return br(e)?e.data.slice(gr):e.data}function _r(e,t){if(t.keyCode==Kn.arrowleft){var n=t.domTarget.ownerDocument.defaultView.getSelection();if(1==n.rangeCount&&n.getRangeAt(0).collapsed){var r=n.getRangeAt(0).startContainer,i=n.getRangeAt(0).startOffset;br(r)&&i<=gr&&n.collapse(r,0)}}}function xr(e,t,n){var r=arguments.length>3&&void 0!==arguments[3]&&arguments[3];n=n||function(e,t){return e===t},Array.isArray(e)||(e=Array.from(e)),Array.isArray(t)||(t=Array.from(t));var i=function(e,t,n){var r=Tr(e,t,n);if(-1===r)return{firstIndex:-1,lastIndexOld:-1,lastIndexNew:-1};var i=Tr(Cr(e,r),Cr(t,r),n);return{firstIndex:r,lastIndexOld:e.length-i,lastIndexNew:t.length-i}}(e,t,n);return r?function(e,t){var n=e.firstIndex,r=e.lastIndexOld,i=e.lastIndexNew;if(-1===n)return Array(t).fill("equal");var o=[];return n>0&&(o=o.concat(Array(n).fill("equal"))),i-n>0&&(o=o.concat(Array(i-n).fill("insert"))),r-n>0&&(o=o.concat(Array(r-n).fill("delete"))),i<t&&(o=o.concat(Array(t-i).fill("equal"))),o}(i,t.length):function(e,t){var n=[],r=t.firstIndex,i=t.lastIndexOld,o=t.lastIndexNew;return o-r>0&&n.push({index:r,type:"insert",values:e.slice(r,o)}),i-r>0&&n.push({index:r+(o-r),type:"delete",howMany:i-r}),n}(t,i)}function Tr(e,t,n){for(var r=0;r<Math.max(e.length,t.length);r++)if(void 0===e[r]||void 0===t[r]||!n(e[r],t[r]))return r;return-1}function Cr(e,t){return e.slice(t).reverse()}function Sr(e,t,n){n=n||function(e,t){return e===t};var r,i,o=e.length,a=t.length;if(o>200||a>200||o+a>300)return Sr.fastDiff(e,t,n,!0);if(a<o){var s=e;e=t,t=s,r="delete",i="insert"}else r="insert",i="delete";var l=e.length,u=t.length,c=u-l,f={},d={};function h(o){var a=(void 0!==d[o-1]?d[o-1]:-1)+1,s=void 0!==d[o+1]?d[o+1]:-1,c=a>s?-1:1;f[o+c]&&(f[o]=f[o+c].slice(0)),f[o]||(f[o]=[]),f[o].push(a>s?r:i);for(var h=Math.max(a,s),p=h-o;p<l&&h<u&&n(e[p],t[h]);)p++,h++,f[o].push("equal");return h}var p,v=0;do{for(p=-v;p<c;p++)d[p]=h(p);for(p=c+v;p>c;p--)d[p]=h(p);d[c]=h(c),v++}while(d[c]!==u);return f[c].slice(1)}function Er(e,t,n){e.insertBefore(n,e.childNodes[t]||null)}function Ar(e){var t=e.parentNode;t&&t.removeChild(e)}function Pr(e){if(e){if(e.defaultView)return e instanceof e.defaultView.Document;if(e.ownerDocument&&e.ownerDocument.defaultView)return e instanceof e.ownerDocument.defaultView.Node}return!1}Sr.fastDiff=xr;var Mr=function(){function e(t,n){f(this,e),this.domDocuments=new Set,this.domConverter=t,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=n,this.isFocused=!1,this._inlineFiller=null,this._fakeSelectionContainer=null}return d(e,[{key:"markToSync",value:function(e,t){if("text"===e)this.domConverter.mapViewToDom(t.parent)&&this.markedTexts.add(t);else{if(!this.domConverter.mapViewToDom(t))return;if("attributes"===e)this.markedAttributes.add(t);else{if("children"!==e)throw new It.b("view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.",this);this.markedChildren.add(t)}}}},{key:"render",value:function(){var e,t=!0,n=!1,r=void 0;try{for(var i,o=this.markedChildren[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._updateChildrenMappings(a)}}catch(E){n=!0,r=E}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?e=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(e=this.selection.getFirstPosition(),this.markedChildren.add(e.parent));var s=!0,l=!1,u=void 0;try{for(var c,f=this.markedAttributes[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;this._updateAttrs(d)}}catch(E){l=!0,u=E}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}var h=!0,p=!1,v=void 0;try{for(var m,g=this.markedChildren[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value;this._updateChildren(y,{inlineFillerPosition:e})}}catch(E){p=!0,v=E}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}var b=!0,k=!1,w=void 0;try{for(var _,x=this.markedTexts[Symbol.iterator]();!(b=(_=x.next()).done);b=!0){var T=_.value;!this.markedChildren.has(T.parent)&&this.domConverter.mapViewToDom(T.parent)&&this._updateText(T,{inlineFillerPosition:e})}}catch(E){k=!0,w=E}finally{try{b||null==x.return||x.return()}finally{if(k)throw w}}if(e){var C=this.domConverter.viewPositionToDom(e),S=C.parent.ownerDocument;br(C.parent)?this._inlineFiller=C.parent:this._inlineFiller=Or(S,C.parent,C.offset)}else this._inlineFiller=null;this._updateSelection(),this._updateFocus(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}},{key:"_updateChildrenMappings",value:function(e){var t=this.domConverter.mapViewToDom(e);if(t){var n=this.domConverter.mapViewToDom(e).childNodes,r=Array.from(this.domConverter.viewChildrenToDom(e,t.ownerDocument,{withChildren:!1})),i=this._diffNodeLists(n,r),o=this._findReplaceActions(i,n,r);if(-1!==o.indexOf("replace")){var a={equal:0,insert:0,delete:0},s=!0,l=!1,u=void 0;try{for(var c,f=o[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;if("replace"===d){var h=a.equal+a.insert,p=a.equal+a.delete,v=e.getChild(h);v&&!v.is("uiElement")&&this._updateElementMappings(v,n[p]),Ar(r[h]),a.equal++}else a[d]++}}catch(m){l=!0,u=m}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}}}}},{key:"_updateElementMappings",value:function(e,t){this.domConverter.unbindDomElement(t),this.domConverter.bindElements(t,e),this.markedChildren.add(e),this.markedAttributes.add(e)}},{key:"_getInlineFillerPosition",value:function(){var e=this.selection.getFirstPosition();return e.parent.is("text")?Nn._createBefore(this.selection.getFirstPosition().parent):e}},{key:"_isSelectionInInlineFiller",value:function(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;var e=this.selection.getFirstPosition(),t=this.domConverter.viewPositionToDom(e);return!!(t&&pr(t.parent)&&br(t.parent))}},{key:"_removeInlineFiller",value:function(){var e=this._inlineFiller;if(!br(e))throw new It.b("view-renderer-filler-was-lost: The inline filler node was lost.",this);kr(e)?e.parentNode.removeChild(e):e.data=e.data.substr(gr),this._inlineFiller=null}},{key:"_needsInlineFillerAtSelection",value:function(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;var e=this.selection.getFirstPosition(),t=e.parent,n=e.offset;if(!this.domConverter.mapViewToDom(t.root))return!1;if(!t.is("element"))return!1;if(!function(e){if("false"==e.getAttribute("contenteditable"))return!1;var t=e.findAncestor((function(e){return e.hasAttribute("contenteditable")}));return!t||"true"==t.getAttribute("contenteditable")}(t))return!1;if(n===t.getFillerOffset())return!1;var r=e.nodeBefore,i=e.nodeAfter;return!(r instanceof Kt||i instanceof Kt)}},{key:"_updateText",value:function(e,t){var n=this.domConverter.findCorrespondingDomText(e),r=this.domConverter.viewToDom(e,n.ownerDocument),i=n.data,o=r.data,a=t.inlineFillerPosition;if(a&&a.parent==e.parent&&a.offset==e.index&&(o=yr+o),i!=o){var s=xr(i,o),l=!0,u=!1,c=void 0;try{for(var f,d=s[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;"insert"===h.type?n.insertData(h.index,h.values.join("")):n.deleteData(h.index,h.howMany)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}},{key:"_updateAttrs",value:function(e){var t=this.domConverter.mapViewToDom(e);if(t){var n=Array.from(t.attributes).map((function(e){return e.name})),r=e.getAttributeKeys(),i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;t.setAttribute(u,e.getAttribute(u))}}catch(m){o=!0,a=m}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var c=!0,f=!1,d=void 0;try{for(var h,p=n[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;e.hasAttribute(v)||t.removeAttribute(v)}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}},{key:"_updateChildren",value:function(e,t){var n=this.domConverter.mapViewToDom(e);if(n){var r=t.inlineFillerPosition,i=this.domConverter.mapViewToDom(e).childNodes,o=Array.from(this.domConverter.viewChildrenToDom(e,n.ownerDocument,{bind:!0,inlineFillerPosition:r}));r&&r.parent===e&&Or(n.ownerDocument,o,r.offset);var a=this._diffNodeLists(i,o),s=0,l=new Set,u=!0,c=!1,f=void 0;try{for(var d,h=a[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;"insert"===p?(Er(n,s,o[s]),s++):"delete"===p?(l.add(i[s]),Ar(i[s])):(this._markDescendantTextToSync(this.domConverter.domToView(o[s])),s++)}}catch(w){c=!0,f=w}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=l[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;k.parentNode||this.domConverter.unbindDomElement(k)}}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}},{key:"_diffNodeLists",value:function(e,t){return Sr(e=function(e,t){var n=Array.from(e);return 0!=n.length&&t?(n[n.length-1]==t&&n.pop(),n):n}(e,this._fakeSelectionContainer),t,Ir.bind(null,this.domConverter))}},{key:"_findReplaceActions",value:function(e,t,n){if(-1===e.indexOf("insert")||-1===e.indexOf("delete"))return e;var r=[],i=[],o=[],a={equal:0,insert:0,delete:0},s=!0,l=!1,u=void 0;try{for(var c,f=e[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;"insert"===d?o.push(n[a.equal+a.insert]):"delete"===d?i.push(t[a.equal+a.delete]):((r=r.concat(Sr(i,o,Nr).map((function(e){return"equal"===e?"replace":e})))).push("equal"),i=[],o=[]),a[d]++}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}return r.concat(Sr(i,o,Nr).map((function(e){return"equal"===e?"replace":e})))}},{key:"_markDescendantTextToSync",value:function(e){if(e)if(e.is("text"))this.markedTexts.add(e);else if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._markDescendantTextToSync(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}}},{key:"_updateSelection",value:function(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();var e=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&e&&(this.selection.isFake?this._updateFakeSelection(e):(this._removeFakeSelection(),this._updateDomSelection(e)))}},{key:"_updateFakeSelection",value:function(e){var t=e.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=function(e){var t=e.createElement("div");return Object.assign(t.style,{position:"fixed",top:0,left:"-9999px",width:"42px"}),t.textContent="\xa0",t}(t));var n=this._fakeSelectionContainer;if(this.domConverter.bindFakeSelection(n,this.selection),this._fakeSelectionNeedsUpdate(e)){n.parentElement&&n.parentElement==e||e.appendChild(n),n.textContent=this.selection.fakeSelectionLabel||"\xa0";var r=t.getSelection(),i=t.createRange();r.removeAllRanges(),i.selectNodeContents(n),r.addRange(i)}}},{key:"_updateDomSelection",value:function(e){var t=e.ownerDocument.defaultView.getSelection();if(this._domSelectionNeedsUpdate(t)){var n=this.domConverter.viewPositionToDom(this.selection.anchor),r=this.domConverter.viewPositionToDom(this.selection.focus);e.focus(),t.collapse(n.parent,n.offset),t.extend(r.parent,r.offset),$n.isGecko&&function(e,t){var n=e.parent;if(n.nodeType==Node.ELEMENT_NODE&&e.offset==n.childNodes.length-1){var r=n.childNodes[e.offset];r&&"BR"==r.tagName&&t.addRange(t.getRangeAt(0))}}(r,t)}}},{key:"_domSelectionNeedsUpdate",value:function(e){if(!this.domConverter.isDomSelectionCorrect(e))return!0;var t=e&&this.domConverter.domSelectionToView(e);return(!t||!this.selection.isEqual(t))&&!(!this.selection.isCollapsed&&this.selection.isSimilar(t))}},{key:"_fakeSelectionNeedsUpdate",value:function(e){var t=this._fakeSelectionContainer,n=e.ownerDocument.getSelection();return!t||t.parentElement!==e||n.anchorNode!==t&&!t.contains(n.anchorNode)||t.textContent!==this.selection.fakeSelectionLabel}},{key:"_removeDomSelection",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.domDocuments[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(o.getSelection().rangeCount){var a=o.activeElement,s=this.domConverter.mapDomToView(a);a&&s&&o.getSelection().removeAllRanges()}}}catch(l){t=!0,n=l}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"_removeFakeSelection",value:function(){var e=this._fakeSelectionContainer;e&&e.remove()}},{key:"_updateFocus",value:function(){if(this.isFocused){var e=this.selection.editableElement;e&&this.domConverter.focus(e)}}}]),e}();function Or(e,t,n){var r=t instanceof Array?t:t.childNodes,i=r[n];if(pr(i))return i.data=yr+i.data,i;var o=e.createTextNode(yr);return Array.isArray(t)?r.splice(n,0,o):Er(t,n,o),o}function Nr(e,t){return Pr(e)&&Pr(t)&&!pr(e)&&!pr(t)&&e.tagName.toLowerCase()===t.tagName.toLowerCase()}function Ir(e,t,n){return t===n||(pr(t)&&pr(n)?t.data===n.data:!(!e.isBlockFiller(t)||!e.isBlockFiller(n)))}Yt(Mr,wn);var Dr={window:window,document:document};function Rr(e){for(var t=0;e.previousSibling;)e=e.previousSibling,t++;return t}function jr(e){for(var t=[];e&&e.nodeType!=Node.DOCUMENT_NODE;)t.unshift(e),e=e.parentNode;return t}var Lr=mr(document),Fr=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this.blockFillerMode=t.blockFillerMode||"br",this.preElements=["pre"],this.blockElements=["p","div","h1","h2","h3","h4","h5","h6","li","dd","dt","figcaption"],this._blockFiller="br"==this.blockFillerMode?mr:vr,this._domToViewMapping=new WeakMap,this._viewToDomMapping=new WeakMap,this._fakeSelectionMapping=new WeakMap}return d(e,[{key:"bindFakeSelection",value:function(e,t){this._fakeSelectionMapping.set(e,new jn(t))}},{key:"fakeSelectionToView",value:function(e){return this._fakeSelectionMapping.get(e)}},{key:"bindElements",value:function(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}},{key:"unbindDomElement",value:function(e){var t=this._domToViewMapping.get(e);if(t){this._domToViewMapping.delete(e),this._viewToDomMapping.delete(t);for(var n=0,r=Array.from(e.childNodes);n<r.length;n++){var i=r[n];this.unbindDomElement(i)}}}},{key:"bindDocumentFragments",value:function(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}},{key:"viewToDom",value:function(e,t){var n,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(e.is("text")){var i=this._processDataFromViewText(e);return t.createTextNode(i)}if(this.mapViewToDom(e))return this.mapViewToDom(e);if(e.is("documentFragment"))n=t.createDocumentFragment(),r.bind&&this.bindDocumentFragments(n,e);else{if(e.is("uiElement"))return n=e.render(t),r.bind&&this.bindElements(n,e),n;n=e.hasAttribute("xmlns")?t.createElementNS(e.getAttribute("xmlns"),e.name):t.createElement(e.name),r.bind&&this.bindElements(n,e);var o=!0,a=!1,s=void 0;try{for(var l,u=e.getAttributeKeys()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;n.setAttribute(c,e.getAttribute(c))}}catch(g){a=!0,s=g}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}if(r.withChildren||void 0===r.withChildren){var f=!0,d=!1,h=void 0;try{for(var p,v=this.viewChildrenToDom(e,t,r)[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;n.appendChild(m)}}catch(g){d=!0,h=g}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}return n}},{key:"viewChildrenToDom",value:s.mark((function e(t,n){var r,i,o,a,l,u,c,f,d,h=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:r=h.length>2&&void 0!==h[2]?h[2]:{},i=t.getFillerOffset&&t.getFillerOffset(),o=0,a=!0,l=!1,u=void 0,e.prev=6,c=t.getChildren()[Symbol.iterator]();case 8:if(a=(f=c.next()).done){e.next=20;break}if(d=f.value,e.t0=i===o,!e.t0){e.next=14;break}return e.next=14,this._blockFiller(n);case 14:return e.next=16,this.viewToDom(d,n,r);case 16:o++;case 17:a=!0,e.next=8;break;case 20:e.next=26;break;case 22:e.prev=22,e.t1=e.catch(6),l=!0,u=e.t1;case 26:e.prev=26,e.prev=27,a||null==c.return||c.return();case 29:if(e.prev=29,!l){e.next=32;break}throw u;case 32:return e.finish(29);case 33:return e.finish(26);case 34:if(e.t2=i===o,!e.t2){e.next=38;break}return e.next=38,this._blockFiller(n);case 38:case"end":return e.stop()}}),e,this,[[6,22,26,34],[27,,29,33]])}))},{key:"viewRangeToDom",value:function(e){var t=this.viewPositionToDom(e.start),n=this.viewPositionToDom(e.end),r=document.createRange();return r.setStart(t.parent,t.offset),r.setEnd(n.parent,n.offset),r}},{key:"viewPositionToDom",value:function(e){var t,n,r,i=e.parent;if(i.is("text")){var o=this.findCorrespondingDomText(i);if(!o)return null;var a=e.offset;return br(o)&&(a+=gr),{parent:o,offset:a}}if(0===e.offset){if(!(t=this.mapViewToDom(i)))return null;r=t.childNodes[0]}else{var s=e.nodeBefore;if(!(n=s.is("text")?this.findCorrespondingDomText(s):this.mapViewToDom(e.nodeBefore)))return null;t=n.parentNode,r=n.nextSibling}return pr(r)&&br(r)?{parent:r,offset:gr}:{parent:t,offset:n?Rr(n)+1:0}}},{key:"domToView",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(this.isBlockFiller(e,this.blockFillerMode))return null;var n,r=this.getParentUIElement(e,this._domToViewMapping);if(r)return r;if(pr(e)){if(kr(e))return null;var i=this._processDataFromDomText(e);return""===i?null:new Kt(i)}if(this.isComment(e))return null;if(this.mapDomToView(e))return this.mapDomToView(e);if(this.isDocumentFragment(e))n=new rr,t.bind&&this.bindDocumentFragments(e,n);else{var o=t.keepOriginalCase?e.tagName:e.tagName.toLowerCase();n=new nn(o),t.bind&&this.bindElements(e,n);for(var a=e.attributes,s=a.length-1;s>=0;s--)n._setAttribute(a[s].name,a[s].value)}if(t.withChildren||void 0===t.withChildren){var l=!0,u=!1,c=void 0;try{for(var f,d=this.domChildrenToView(e,t)[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;n._appendChild(h)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}return n}},{key:"domChildrenToView",value:s.mark((function e(t){var n,r,i,o,a=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=a.length>1&&void 0!==a[1]?a[1]:{},r=0;case 2:if(!(r<t.childNodes.length)){e.next=11;break}if(i=t.childNodes[r],o=this.domToView(i,n),e.t0=null!==o,!e.t0){e.next=8;break}return e.next=8,o;case 8:r++,e.next=2;break;case 11:case"end":return e.stop()}}),e,this)}))},{key:"domSelectionToView",value:function(e){if(1===e.rangeCount){var t=e.getRangeAt(0).startContainer;pr(t)&&(t=t.parentNode);var n=this.fakeSelectionToView(t);if(n)return n}for(var r=this.isDomSelectionBackward(e),i=[],o=0;o<e.rangeCount;o++){var a=e.getRangeAt(o),s=this.domRangeToView(a);s&&i.push(s)}return new jn(i,{backward:r})}},{key:"domRangeToView",value:function(e){var t=this.domPositionToView(e.startContainer,e.startOffset),n=this.domPositionToView(e.endContainer,e.endOffset);return t&&n?new In(t,n):null}},{key:"domPositionToView",value:function(e,t){if(this.isBlockFiller(e,this.blockFillerMode))return this.domPositionToView(e.parentNode,Rr(e));var n=this.mapDomToView(e);if(n&&n.is("uiElement"))return Nn._createBefore(n);if(pr(e)){if(kr(e))return this.domPositionToView(e.parentNode,Rr(e));var r=this.findCorrespondingViewText(e),i=t;return r?(br(e)&&(i=(i-=gr)<0?0:i),new Nn(r,i)):null}if(0===t){var o=this.mapDomToView(e);if(o)return new Nn(o,0)}else{var a=e.childNodes[t-1],s=pr(a)?this.findCorrespondingViewText(a):this.mapDomToView(a);if(s&&s.parent)return new Nn(s.parent,s.index+1)}return null}},{key:"mapDomToView",value:function(e){return this.getParentUIElement(e)||this._domToViewMapping.get(e)}},{key:"findCorrespondingViewText",value:function(e){if(kr(e))return null;var t=this.getParentUIElement(e);if(t)return t;var n=e.previousSibling;if(n){if(!this.isElement(n))return null;var r=this.mapDomToView(n);if(r)return r.nextSibling instanceof Kt?r.nextSibling:null}else{var i=this.mapDomToView(e.parentNode);if(i){var o=i.getChild(0);return o instanceof Kt?o:null}}return null}},{key:"mapViewToDom",value:function(e){return this._viewToDomMapping.get(e)}},{key:"findCorrespondingDomText",value:function(e){var t=e.previousSibling;return t&&this.mapViewToDom(t)?this.mapViewToDom(t).nextSibling:!t&&e.parent&&this.mapViewToDom(e.parent)?this.mapViewToDom(e.parent).childNodes[0]:null}},{key:"focus",value:function(e){var t=this.mapViewToDom(e);if(t&&t.ownerDocument.activeElement!==t){var n=Dr.window,r=n.scrollX,i=n.scrollY,o=[];Vr(t,(function(e){var t=e.scrollLeft,n=e.scrollTop;o.push([t,n])})),t.focus(),Vr(t,(function(e){var t=o.shift(),n=c(t,2),r=n[0],i=n[1];e.scrollLeft=r,e.scrollTop=i})),Dr.window.scrollTo(r,i)}}},{key:"isElement",value:function(e){return e&&e.nodeType==Node.ELEMENT_NODE}},{key:"isDocumentFragment",value:function(e){return e&&e.nodeType==Node.DOCUMENT_FRAGMENT_NODE}},{key:"isComment",value:function(e){return e&&e.nodeType==Node.COMMENT_NODE}},{key:"isBlockFiller",value:function(e){return"br"==this.blockFillerMode?e.isEqualNode(Lr):!("BR"!==e.tagName||!Br(e,this.blockElements)||1!==e.parentNode.childNodes.length)||function(e,t){return pr(e)&&"\xa0"==e.data&&Br(e,t)&&1===e.parentNode.childNodes.length}(e,this.blockElements)}},{key:"isDomSelectionBackward",value:function(e){if(e.isCollapsed)return!1;var t=document.createRange();t.setStart(e.anchorNode,e.anchorOffset),t.setEnd(e.focusNode,e.focusOffset);var n=t.collapsed;return t.detach(),n}},{key:"getParentUIElement",value:function(e){var t=jr(e);for(t.pop();t.length;){var n=t.pop(),r=this._domToViewMapping.get(n);if(r&&r.is("uiElement"))return r}return null}},{key:"isDomSelectionCorrect",value:function(e){return this._isDomSelectionPositionCorrect(e.anchorNode,e.anchorOffset)&&this._isDomSelectionPositionCorrect(e.focusNode,e.focusOffset)}},{key:"_isDomSelectionPositionCorrect",value:function(e,t){if(pr(e)&&br(e)&&t<gr)return!1;if(this.isElement(e)&&br(e.childNodes[t]))return!1;var n=this.mapDomToView(e);return!n||!n.is("uiElement")}},{key:"_processDataFromViewText",value:function(e){var t=this,n=e.data;if(e.getAncestors().some((function(e){return t.preElements.includes(e.name)})))return n;if(" "==n.charAt(0)){var r=this._getTouchingViewTextNode(e,!1);(!r||!this._nodeEndsWithSpace(r))&&r||(n="\xa0"+n.substr(1))}if(" "==n.charAt(n.length-1)){var i=this._getTouchingViewTextNode(e,!0);" "!=n.charAt(n.length-2)&&i&&" "!=i.data.charAt(0)||(n=n.substr(0,n.length-1)+"\xa0")}return n.replace(/ {2}/g," \xa0")}},{key:"_nodeEndsWithSpace",value:function(e){var t=this;if(e.getAncestors().some((function(e){return t.preElements.includes(e.name)})))return!1;var n=this._processDataFromViewText(e);return" 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c=n.viewPositionToDom(u);i?r.collapse(c.parent,c.offset):r.extend(c.parent,c.offset)}}}}(0,n,e.domConverter)}))}(this),this.on("render",(function(){t._render(),t.document.fire("layoutChanged"),t._hasChangedSinceTheLastRendering=!1})),this.listenTo(this.document.selection,"change",(function(){t._hasChangedSinceTheLastRendering=!0}))}return d(e,[{key:"attachDomRoot",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"main",r=this.document.getRoot(n);r._name=e.tagName.toLowerCase();for(var i={},o=0,a=Array.from(e.attributes);o<a.length;o++){var s=a[o],l=s.name,u=s.value;i[l]=u,"class"===l?this._writer.addClass(u.split(" "),r):this._writer.setAttribute(l,u,r)}this._initialDomRootAttributes.set(e,i);var c=function(){t._writer.setAttribute("contenteditable",!r.isReadOnly,r),r.isReadOnly?t._writer.addClass("ck-read-only",r):t._writer.removeClass("ck-read-only",r)};c(),this.domRoots.set(n,e),this.domConverter.bindElements(e,r),this._renderer.markToSync("children",r),this._renderer.markToSync("attributes",r),this._renderer.domDocuments.add(e.ownerDocument),r.on("change:children",(function(e,n){return t._renderer.markToSync("children",n)})),r.on("change:attributes",(function(e,n){return t._renderer.markToSync("attributes",n)})),r.on("change:text",(function(e,n){return t._renderer.markToSync("text",n)})),r.on("change:isReadOnly",(function(){return t.change(c)})),r.on("change",(function(){t._hasChangedSinceTheLastRendering=!0}));var f=!0,d=!1,h=void 0;try{for(var p,v=this._observers.values()[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;m.observe(e,n)}}catch(g){d=!0,h=g}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}},{key:"detachDomRoot",value:function(e){var t=this.domRoots.get(e);Array.from(t.attributes).forEach((function(e){var n=e.name;return t.removeAttribute(n)}));var n=this._initialDomRootAttributes.get(t);for(var r in n)t.setAttribute(r,n[r]);this.domRoots.delete(e),this.domConverter.unbindDomElement(t)}},{key:"getDomRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.domRoots.get(e)}},{key:"addObserver",value:function(e){var t=this._observers.get(e);if(t)return t;t=new e(this),this._observers.set(e,t);var n=!0,r=!1,i=void 0;try{for(var o,a=this.domRoots[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];t.observe(f,u)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t.enable(),t}},{key:"getObserver",value:function(e){return this._observers.get(e)}},{key:"disableObservers",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.disable()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"enableObservers",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.enable()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"scrollToTheSelection",value:function(){var e=this.document.selection.getFirstRange();e&&ji({target:this.domConverter.viewRangeToDom(e),viewportOffset:20})}},{key:"focus",value:function(){if(!this.document.isFocused){var e=this.document.selection.editableElement;e&&(this.domConverter.focus(e),this.forceRender())}}},{key:"change",value:function(e){if(this.isRenderingInProgress||this._postFixersInProgress)throw new It.b("cannot-change-view-tree: Attempting to make changes to the view when it is in an incorrect state: rendering or post-fixers are in progress. This may cause some unexpected behavior and inconsistency between the DOM and the view.",this);try{if(this._ongoingChange)return e(this._writer);this._ongoingChange=!0;var t=e(this._writer);return this._ongoingChange=!1,!this._renderingDisabled&&this._hasChangedSinceTheLastRendering&&(this._postFixersInProgress=!0,this.document._callPostFixers(this._writer),this._postFixersInProgress=!1,this.fire("render")),t}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"forceRender",value:function(){this._hasChangedSinceTheLastRendering=!0,this.change((function(){}))}},{key:"destroy",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.destroy()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this.document.destroy(),this.stopListening()}},{key:"createPositionAt",value:function(e,t){return Nn._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return Nn._createAfter(e)}},{key:"createPositionBefore",value:function(e){return Nn._createBefore(e)}},{key:"createRange",value:function(e,t){return new In(e,t)}},{key:"createRangeOn",value:function(e){return In._createOn(e)}},{key:"createRangeIn",value:function(e){return In._createIn(e)}},{key:"createSelection",value:function(e,t,n){return new jn(e,t,n)}},{key:"_disableRendering",value:function(e){this._renderingDisabled=e,0==e&&this.change((function(){}))}},{key:"_render",value:function(){this.isRenderingInProgress=!0,this.disableObservers(),this._renderer.render(),this.enableObservers(),this.isRenderingInProgress=!1}}]),e}();function $i(e){return R(e)?Xt(e):new Map(e)}Yt(Yi,wn);var Gi=function(){function e(t){f(this,e),this.parent=null,this._attrs=$i(t)}return d(e,[{key:"getPath",value:function(){for(var e=[],t=this;t.parent;)e.unshift(t.startOffset),t=t.parent;return e}},{key:"getAncestors",value:function(){for(var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeSelf:!1,parentFirst:!1},t=[],n=e.includeSelf?this:this.parent;n;)t[e.parentFirst?"push":"unshift"](n),n=n.parent;return t}},{key:"getCommonAncestor",value:function(e){for(var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=this.getAncestors(t),r=e.getAncestors(t),i=0;n[i]==r[i]&&n[i];)i++;return 0===i?null:n[i-1]}},{key:"isBefore",value:function(e){if(this==e)return!1;if(this.root!==e.root)return!1;var t=this.getPath(),n=e.getPath(),r=$t(t,n);switch(r){case"prefix":return!0;case"extension":return!1;default:return t[r]<n[r]}}},{key:"isAfter",value:function(e){return this!=e&&this.root===e.root&&!this.isBefore(e)}},{key:"hasAttribute",value:function(e){return this._attrs.has(e)}},{key:"getAttribute",value:function(e){return this._attrs.get(e)}},{key:"getAttributes",value:function(){return this._attrs.entries()}},{key:"getAttributeKeys",value:function(){return this._attrs.keys()}},{key:"toJSON",value:function(){var e={};return this._attrs.size&&(e.attributes=Array.from(this._attrs).reduce((function(e,t){return e[t[0]]=t[1],e}),{})),e}},{key:"is",value:function(e){return"node"==e||"model:node"==e}},{key:"_clone",value:function(){return new e(this._attrs)}},{key:"_remove",value:function(){this.parent._removeChildren(this.index)}},{key:"_setAttribute",value:function(e,t){this._attrs.set(e,t)}},{key:"_setAttributesTo",value:function(e){this._attrs=$i(e)}},{key:"_removeAttribute",value:function(e){return this._attrs.delete(e)}},{key:"_clearAttributes",value:function(){this._attrs.clear()}},{key:"index",get:function(){var e;if(!this.parent)return null;if(null===(e=this.parent.getChildIndex(this)))throw new It.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return e}},{key:"startOffset",get:function(){var e;if(!this.parent)return null;if(null===(e=this.parent.getChildStartOffset(this)))throw new It.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return e}},{key:"offsetSize",get:function(){return 1}},{key:"endOffset",get:function(){return this.parent?this.startOffset+this.offsetSize:null}},{key:"nextSibling",get:function(){var e=this.index;return null!==e&&this.parent.getChild(e+1)||null}},{key:"previousSibling",get:function(){var e=this.index;return null!==e&&this.parent.getChild(e-1)||null}},{key:"root",get:function(){for(var e=this;e.parent;)e=e.parent;return e}},{key:"document",get:function(){return this.root==this?null:this.root.document||null}}]),e}(),Qi=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,n)))._data=e||"",r}return v(t,e),d(t,[{key:"is",value:function(e){return"text"==e||"model:text"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.data=this.data,e}},{key:"_clone",value:function(){return new t(this.data,this.getAttributes())}},{key:"offsetSize",get:function(){return this.data.length}},{key:"data",get:function(){return this._data}}],[{key:"fromJSON",value:function(e){return new t(e.data,e.attributes)}}]),t}(Gi),Ki=function(){function e(t,n,r){if(f(this,e),this.textNode=t,n<0||n>t.offsetSize)throw new It.b("model-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.",this);if(r<0||n+r>t.offsetSize)throw new It.b("model-textproxy-wrong-length: Given length value is incorrect.",this);this.data=t.data.substring(n,n+r),this.offsetInText=n}return d(e,[{key:"is",value:function(e){return"textProxy"==e||"model:textProxy"==e}},{key:"getPath",value:function(){var e=this.textNode.getPath();return e.length>0&&(e[e.length-1]+=this.offsetInText),e}},{key:"getAncestors",value:function(){for(var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeSelf:!1,parentFirst:!1},t=[],n=e.includeSelf?this:this.parent;n;)t[e.parentFirst?"push":"unshift"](n),n=n.parent;return t}},{key:"hasAttribute",value:function(e){return this.textNode.hasAttribute(e)}},{key:"getAttribute",value:function(e){return this.textNode.getAttribute(e)}},{key:"getAttributes",value:function(){return this.textNode.getAttributes()}},{key:"getAttributeKeys",value:function(){return this.textNode.getAttributeKeys()}},{key:"startOffset",get:function(){return null!==this.textNode.startOffset?this.textNode.startOffset+this.offsetInText:null}},{key:"offsetSize",get:function(){return this.data.length}},{key:"endOffset",get:function(){return null!==this.startOffset?this.startOffset+this.offsetSize:null}},{key:"isPartial",get:function(){return this.offsetSize!==this.textNode.offsetSize}},{key:"parent",get:function(){return this.textNode.parent}},{key:"root",get:function(){return this.textNode.root}},{key:"document",get:function(){return this.textNode.document}}]),e}(),Ji=function(){function e(t){f(this,e),this._nodes=[],t&&this._insertNodes(0,t)}return d(e,[{key:Symbol.iterator,value:function(){return this._nodes[Symbol.iterator]()}},{key:"getNode",value:function(e){return this._nodes[e]||null}},{key:"getNodeIndex",value:function(e){var t=this._nodes.indexOf(e);return-1==t?null:t}},{key:"getNodeStartOffset",value:function(e){var t=this.getNodeIndex(e);return null===t?null:this._nodes.slice(0,t).reduce((function(e,t){return e+t.offsetSize}),0)}},{key:"indexToOffset",value:function(e){if(e==this._nodes.length)return this.maxOffset;var t=this._nodes[e];if(!t)throw new It.b("model-nodelist-index-out-of-bounds: Given index cannot be found in the node list.",this);return this.getNodeStartOffset(t)}},{key:"offsetToIndex",value:function(e){var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=this._nodes[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(e>=t&&e<t+s.offsetSize)return this.getNodeIndex(s);t+=s.offsetSize}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}if(t!=e)throw new It.b("model-nodelist-offset-out-of-bounds: Given offset cannot be found in the node list.",this,{offset:e,nodeList:this});return this.length}},{key:"_insertNodes",value:function(e,t){var n,r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)if(!(a.value instanceof Gi))throw new It.b("model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.",this)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}(n=this._nodes).splice.apply(n,[e,0].concat(u(t)))}},{key:"_removeNodes",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1;return this._nodes.splice(e,t)}},{key:"toJSON",value:function(){return this._nodes.map((function(e){return e.toJSON()}))}},{key:"length",get:function(){return this._nodes.length}},{key:"maxOffset",get:function(){return this._nodes.reduce((function(e,t){return e+t.offsetSize}),0)}}]),e}(),Xi=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,n))).name=e,i._children=new Ji,r&&i._insertChild(0,r),i}return v(t,e),d(t,[{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e.replace(/^model:/,"");return n?"element"==r&&n==this.name:"element"==r||r==this.name||l(p(t.prototype),"is",this).call(this,e)}},{key:"getChild",value:function(e){return this._children.getNode(e)}},{key:"getChildren",value:function(){return this._children[Symbol.iterator]()}},{key:"getChildIndex",value:function(e){return this._children.getNodeIndex(e)}},{key:"getChildStartOffset",value:function(e){return this._children.getNodeStartOffset(e)}},{key:"offsetToIndex",value:function(e){return this._children.offsetToIndex(e)}},{key:"getNodeByPath",value:function(e){var t=this,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t=t.getChild(t.offsetToIndex(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);if(e.name=this.name,this._children.length>0){e.children=[];var n=!0,r=!1,i=void 0;try{for(var o,a=this._children[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.children.push(s.toJSON())}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}return e}},{key:"_clone",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],n=e?Array.from(this._children).map((function(e){return e._clone(!0)})):null;return new t(this.name,this.getAttributes(),n)}},{key:"_appendChild",value:function(e){this._insertChild(this.childCount,e)}},{key:"_insertChild",value:function(e,t){var n=function(e){return"string"==typeof e?[new Qi(e)]:(Zt(e)||(e=[e]),Array.from(e).map((function(e){return"string"==typeof e?new Qi(e):e instanceof Ki?new Qi(e.data,e.getAttributes()):e})))}(t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;null!==l.parent&&l._remove(),l.parent=this}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._children._insertNodes(e,n)}},{key:"_removeChildren",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1,n=this._children._removeNodes(e,t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.parent=null}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"childCount",get:function(){return this._children.length}},{key:"maxOffset",get:function(){return this._children.maxOffset}},{key:"isEmpty",get:function(){return 0===this.childCount}}],[{key:"fromJSON",value:function(e){var n=null;if(e.children){n=[];var r=!0,i=!1,o=void 0;try{for(var a,s=e.children[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.name?n.push(t.fromJSON(l)):n.push(Qi.fromJSON(l))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}return new t(e.name,e.attributes,n)}}]),t}(Gi),Zi=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(f(this,e),!t.boundaries&&!t.startPosition)throw new It.b("model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.",null);var n=t.direction||"forward";if("forward"!=n&&"backward"!=n)throw new It.b("model-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.",t,{direction:n});this.direction=n,this.boundaries=t.boundaries||null,t.startPosition?this.position=t.startPosition.clone():this.position=to._createAt(this.boundaries["backward"==this.direction?"end":"start"]),this.position.stickiness="toNone",this.singleCharacters=!!t.singleCharacters,this.shallow=!!t.shallow,this.ignoreElementEnd=!!t.ignoreElementEnd,this._boundaryStartParent=this.boundaries?this.boundaries.start.parent:null,this._boundaryEndParent=this.boundaries?this.boundaries.end.parent:null,this._visitedParent=this.position.parent}return d(e,[{key:Symbol.iterator,value:function(){return this}},{key:"skip",value:function(e){var t,n,r,i;do{var o;r=this.position,i=this._visitedParent,t=(o=this.next()).done,n=o.value}while(!t&&e(n));t||(this.position=r,this._visitedParent=i)}},{key:"next",value:function(){return"forward"==this.direction?this._next():this._previous()}},{key:"_next",value:function(){var e=this.position,t=this.position.clone(),n=this._visitedParent;if(null===n.parent&&t.offset===n.maxOffset)return{done:!0};if(n===this._boundaryEndParent&&t.offset==this.boundaries.end.offset)return{done:!0};var r=t.textNode?t.textNode:t.nodeAfter;if(r instanceof Xi)return this.shallow?t.offset++:(t.path.push(0),this._visitedParent=r),this.position=t,eo("elementStart",r,e,t,1);if(r instanceof Qi){var i;if(this.singleCharacters)i=1;else{var o=r.endOffset;this._boundaryEndParent==n&&this.boundaries.end.offset<o&&(o=this.boundaries.end.offset),i=o-t.offset}var a=t.offset-r.startOffset,s=new Ki(r,a,i);return t.offset+=i,this.position=t,eo("text",s,e,t,i)}return t.path.pop(),t.offset++,this.position=t,this._visitedParent=n.parent,this.ignoreElementEnd?this._next():eo("elementEnd",n,e,t)}},{key:"_previous",value:function(){var e=this.position,t=this.position.clone(),n=this._visitedParent;if(null===n.parent&&0===t.offset)return{done:!0};if(n==this._boundaryStartParent&&t.offset==this.boundaries.start.offset)return{done:!0};var r=t.textNode?t.textNode:t.nodeBefore;if(r instanceof Xi)return t.offset--,this.shallow?(this.position=t,eo("elementStart",r,e,t,1)):(t.path.push(r.maxOffset),this.position=t,this._visitedParent=r,this.ignoreElementEnd?this._previous():eo("elementEnd",r,e,t));if(r instanceof Qi){var i;if(this.singleCharacters)i=1;else{var o=r.startOffset;this._boundaryStartParent==n&&this.boundaries.start.offset>o&&(o=this.boundaries.start.offset),i=t.offset-o}var a=t.offset-r.startOffset,s=new Ki(r,a-i,i);return t.offset-=i,this.position=t,eo("text",s,e,t,i)}return t.path.pop(),this.position=t,this._visitedParent=n.parent,eo("elementStart",n,e,t,1)}}]),e}();function eo(e,t,n,r,i){return{done:!1,value:{type:e,item:t,previousPosition:n,nextPosition:r,length:i}}}var to=function(){function e(t,n){var r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(f(this,e),!t.is("element")&&!t.is("documentFragment"))throw new It.b("model-position-root-invalid: Position root invalid.",t);if(!(n instanceof Array)||0===n.length)throw new It.b("model-position-path-incorrect-format: Position path must be an array with at least one item.",t,{path:n});n=t.getPath().concat(n),t=t.root,this.root=t,this.path=n,this.stickiness=r}return d(e,[{key:"compareWith",value:function(e){if(this.root!=e.root)return"different";var t=$t(this.path,e.path);switch(t){case"same":return"same";case"prefix":return"before";case"extension":return"after";default:return this.path[t]<e.path[t]?"before":"after"}}},{key:"getLastMatchingPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t.startPosition=this;var n=new Zi(t);return n.skip(e),n.position}},{key:"getParentPath",value:function(){return this.path.slice(0,-1)}},{key:"getAncestors",value:function(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}},{key:"getCommonPath",value:function(e){if(this.root!=e.root)return[];var t=$t(this.path,e.path),n="string"==typeof t?Math.min(this.path.length,e.path.length):t;return this.path.slice(0,n)}},{key:"getCommonAncestor",value:function(e){for(var t=this.getAncestors(),n=e.getAncestors(),r=0;t[r]==n[r]&&t[r];)r++;return 0===r?null:t[r-1]}},{key:"getShiftedBy",value:function(e){var t=this.clone(),n=t.offset+e;return t.offset=n<0?0:n,t}},{key:"isAfter",value:function(e){return"after"==this.compareWith(e)}},{key:"isBefore",value:function(e){return"before"==this.compareWith(e)}},{key:"isEqual",value:function(e){return"same"==this.compareWith(e)}},{key:"isTouching",value:function(t){var n=null,r=null;switch(this.compareWith(t)){case"same":return!0;case"before":n=e._createAt(this),r=e._createAt(t);break;case"after":n=e._createAt(t),r=e._createAt(this);break;default:return!1}for(var i=n.parent;n.path.length+r.path.length;){if(n.isEqual(r))return!0;if(n.path.length>r.path.length){if(n.offset!==i.maxOffset)return!1;n.path=n.path.slice(0,-1),i=i.parent,n.offset++}else{if(0!==r.offset)return!1;r.path=r.path.slice(0,-1)}}}},{key:"is",value:function(e){return"position"==e||"model:position"==e}},{key:"hasSameParentAs",value:function(e){return this.root===e.root&&"same"==$t(this.getParentPath(),e.getParentPath())}},{key:"getTransformedByOperation",value:function(t){var n;switch(t.type){case"insert":n=this._getTransformedByInsertOperation(t);break;case"move":case"remove":case"reinsert":n=this._getTransformedByMoveOperation(t);break;case"split":n=this._getTransformedBySplitOperation(t);break;case"merge":n=this._getTransformedByMergeOperation(t);break;default:n=e._createAt(this)}return n}},{key:"_getTransformedByInsertOperation",value:function(e){return this._getTransformedByInsertion(e.position,e.howMany)}},{key:"_getTransformedByMoveOperation",value:function(e){return this._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany)}},{key:"_getTransformedBySplitOperation",value:function(e){var t=e.movedRange;return t.containsPosition(this)||t.start.isEqual(this)&&"toNext"==this.stickiness?this._getCombined(e.splitPosition,e.moveTargetPosition):e.graveyardPosition?this._getTransformedByMove(e.graveyardPosition,e.insertionPosition,1):this._getTransformedByInsertion(e.insertionPosition,1)}},{key:"_getTransformedByMergeOperation",value:function(t){var n,r=t.movedRange;return r.containsPosition(this)||r.start.isEqual(this)?(n=this._getCombined(t.sourcePosition,t.targetPosition),t.sourcePosition.isBefore(t.targetPosition)&&(n=n._getTransformedByDeletion(t.deletionPosition,1))):n=this.isEqual(t.deletionPosition)?e._createAt(t.deletionPosition):this._getTransformedByMove(t.deletionPosition,t.graveyardPosition,1),n}},{key:"_getTransformedByDeletion",value:function(t,n){var r=e._createAt(this);if(this.root!=t.root)return r;if("same"==$t(t.getParentPath(),this.getParentPath())){if(t.offset<this.offset){if(t.offset+n>this.offset)return null;r.offset-=n}}else if("prefix"==$t(t.getParentPath(),this.getParentPath())){var i=t.path.length-1;if(t.offset<=this.path[i]){if(t.offset+n>this.path[i])return null;r.path[i]-=n}}return r}},{key:"_getTransformedByInsertion",value:function(t,n){var r=e._createAt(this);if(this.root!=t.root)return r;if("same"==$t(t.getParentPath(),this.getParentPath()))(t.offset<this.offset||t.offset==this.offset&&"toPrevious"!=this.stickiness)&&(r.offset+=n);else if("prefix"==$t(t.getParentPath(),this.getParentPath())){var i=t.path.length-1;t.offset<=this.path[i]&&(r.path[i]+=n)}return r}},{key:"_getTransformedByMove",value:function(t,n,r){if(n=n._getTransformedByDeletion(t,r),t.isEqual(n))return e._createAt(this);var i=this._getTransformedByDeletion(t,r);return null===i||t.isEqual(this)&&"toNext"==this.stickiness||t.getShiftedBy(r).isEqual(this)&&"toPrevious"==this.stickiness?this._getCombined(t,n):i._getTransformedByInsertion(n,r)}},{key:"_getCombined",value:function(t,n){var r=t.path.length-1,i=e._createAt(n);return i.stickiness=this.stickiness,i.offset=i.offset+this.path[r]-t.offset,i.path=i.path.concat(this.path.slice(r+1)),i}},{key:"toJSON",value:function(){return{root:this.root.toJSON(),path:Array.from(this.path),stickiness:this.stickiness}}},{key:"clone",value:function(){return new this.constructor(this.root,this.path,this.stickiness)}},{key:"offset",get:function(){return function(e){var t=null==e?0:e.length;return t?e[t-1]:void 0}(this.path)},set:function(e){this.path[this.path.length-1]=e}},{key:"parent",get:function(){for(var e=this.root,t=0;t<this.path.length-1;t++)if(!(e=e.getChild(e.offsetToIndex(this.path[t]))))throw new It.b("model-position-path-incorrect: The position's path is incorrect.",this,{position:this});if(e.is("text"))throw new It.b("model-position-path-incorrect: The position's path is incorrect.",this,{position:this});return e}},{key:"index",get:function(){return this.parent.offsetToIndex(this.offset)}},{key:"textNode",get:function(){var e=this.parent.getChild(this.index);return e instanceof Qi&&e.startOffset<this.offset?e:null}},{key:"nodeAfter",get:function(){return null===this.textNode?this.parent.getChild(this.index):null}},{key:"nodeBefore",get:function(){return null===this.textNode?this.parent.getChild(this.index-1):null}},{key:"isAtStart",get:function(){return 0===this.offset}},{key:"isAtEnd",get:function(){return this.offset==this.parent.maxOffset}}],[{key:"_createAt",value:function(t,n){var r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(t instanceof e)return new e(t.root,t.path,t.stickiness);var i=t;if("end"==n)n=i.maxOffset;else{if("before"==n)return this._createBefore(i,r);if("after"==n)return this._createAfter(i,r);if(0!==n&&!n)throw new It.b("model-createPositionAt-offset-required: Model#createPositionAt() requires the offset when the first parameter is a model item.",[this,t])}if(!i.is("element")&&!i.is("documentFragment"))throw new It.b("model-position-parent-incorrect: Position parent have to be a element or document fragment.",[this,t]);var o=i.getPath();return o.push(n),new this(i.root,o,r)}},{key:"_createAfter",value:function(e,t){if(!e.parent)throw new It.b("model-position-after-root: You cannot make a position after root.",[this,e],{root:e});return this._createAt(e.parent,e.endOffset,t)}},{key:"_createBefore",value:function(e,t){if(!e.parent)throw new It.b("model-position-before-root: You cannot make a position before root.",e,{root:e});return this._createAt(e.parent,e.startOffset,t)}},{key:"fromJSON",value:function(t,n){if("$graveyard"===t.root){var r=new e(n.graveyard,t.path);return r.stickiness=t.stickiness,r}if(!n.getRoot(t.root))throw new It.b("model-position-fromjson-no-root: Cannot create position for document. Root with specified name does not exist.",n,{rootName:t.root});return new e(n.getRoot(t.root),t.path,t.stickiness)}}]),e}(),no=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null;f(this,e),this.start=to._createAt(t),this.end=n?to._createAt(n):to._createAt(t),this.start.stickiness=this.isCollapsed?"toNone":"toNext",this.end.stickiness=this.isCollapsed?"toNone":"toPrevious"}return d(e,[{key:Symbol.iterator,value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(new Zi({boundaries:this,ignoreElementEnd:!0}),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"containsPosition",value:function(e){return e.isAfter(this.start)&&e.isBefore(this.end)}},{key:"containsRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e.isCollapsed&&(t=!1);var n=this.containsPosition(e.start)||t&&this.start.isEqual(e.start),r=this.containsPosition(e.end)||t&&this.end.isEqual(e.end);return n&&r}},{key:"containsItem",value:function(e){var t=to._createBefore(e);return this.containsPosition(t)||this.start.isEqual(t)}},{key:"is",value:function(e){return"range"==e||"model:range"==e}},{key:"isEqual",value:function(e){return this.start.isEqual(e.start)&&this.end.isEqual(e.end)}},{key:"isIntersecting",value:function(e){return this.start.isBefore(e.end)&&this.end.isAfter(e.start)}},{key:"getDifference",value:function(t){var n=[];return this.isIntersecting(t)?(this.containsPosition(t.start)&&n.push(new e(this.start,t.start)),this.containsPosition(t.end)&&n.push(new e(t.end,this.end))):n.push(new e(this.start,this.end)),n}},{key:"getIntersection",value:function(t){if(this.isIntersecting(t)){var n=this.start,r=this.end;return this.containsPosition(t.start)&&(n=t.start),this.containsPosition(t.end)&&(r=t.end),new e(n,r)}return null}},{key:"getMinimalFlatRanges",value:function(){for(var t=[],n=this.start.getCommonPath(this.end).length,r=to._createAt(this.start),i=r.parent;r.path.length>n+1;){var o=i.maxOffset-r.offset;0!==o&&t.push(new e(r,r.getShiftedBy(o))),r.path=r.path.slice(0,-1),r.offset++,i=i.parent}for(;r.path.length<=this.end.path.length;){var a=this.end.path[r.path.length-1],s=a-r.offset;0!==s&&t.push(new e(r,r.getShiftedBy(s))),r.offset=a,r.path.push(0)}return t}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.boundaries=this,new Zi(e)}},{key:"getItems",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,t.ignoreElementEnd=!0,n=new Zi(t),r=!0,i=!1,o=void 0,e.prev=6,a=n[Symbol.iterator]();case 8:if(r=(l=a.next()).done){e.next=15;break}return u=l.value,e.next=12,u.item;case 12:r=!0,e.next=8;break;case 15:e.next=21;break;case 17:e.prev=17,e.t0=e.catch(6),i=!0,o=e.t0;case 21:e.prev=21,e.prev=22,r||null==a.return||a.return();case 24:if(e.prev=24,!i){e.next=27;break}throw o;case 27:return e.finish(24);case 28:return e.finish(21);case 29:case"end":return e.stop()}}),e,this,[[6,17,21,29],[22,,24,28]])}))},{key:"getPositions",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,n=new Zi(t),e.next=5,n.position;case 5:r=!0,i=!1,o=void 0,e.prev=8,a=n[Symbol.iterator]();case 10:if(r=(l=a.next()).done){e.next=17;break}return u=l.value,e.next=14,u.nextPosition;case 14:r=!0,e.next=10;break;case 17:e.next=23;break;case 19:e.prev=19,e.t0=e.catch(8),i=!0,o=e.t0;case 23:e.prev=23,e.prev=24,r||null==a.return||a.return();case 26:if(e.prev=26,!i){e.next=29;break}throw o;case 29:return e.finish(26);case 30:return e.finish(23);case 31:case"end":return e.stop()}}),e,this,[[8,19,23,31],[24,,26,30]])}))},{key:"getTransformedByOperation",value:function(t){switch(t.type){case"insert":return this._getTransformedByInsertOperation(t);case"move":case"remove":case"reinsert":return this._getTransformedByMoveOperation(t);case"split":return[this._getTransformedBySplitOperation(t)];case"merge":return[this._getTransformedByMergeOperation(t)]}return[new e(this.start,this.end)]}},{key:"getTransformedByOperations",value:function(t){var n=[new e(this.start,this.end)],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)for(var l=a.value,c=0;c<n.length;c++){var f=n[c].getTransformedByOperation(l);n.splice.apply(n,[c,1].concat(u(f))),c+=f.length-1}}catch(m){i=!0,o=m}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}for(var d=0;d<n.length;d++)for(var h=n[d],p=d+1;p<n.length;p++){var v=n[p];(h.containsRange(v)||v.containsRange(h)||h.isEqual(v))&&n.splice(p,1)}return n}},{key:"getCommonAncestor",value:function(){return this.start.getCommonAncestor(this.end)}},{key:"toJSON",value:function(){return{start:this.start.toJSON(),end:this.end.toJSON()}}},{key:"clone",value:function(){return new this.constructor(this.start,this.end)}},{key:"_getTransformedByInsertOperation",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];return this._getTransformedByInsertion(e.position,e.howMany,t)}},{key:"_getTransformedByMoveOperation",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.sourcePosition,r=e.howMany,i=e.targetPosition;return this._getTransformedByMove(n,i,r,t)}},{key:"_getTransformedBySplitOperation",value:function(t){var n=this.start._getTransformedBySplitOperation(t),r=this.end._getTransformedBySplitOperation(t);return this.end.isEqual(t.insertionPosition)&&(r=this.end.getShiftedBy(1)),n.root!=r.root&&(r=this.end.getShiftedBy(-1)),new e(n,r)}},{key:"_getTransformedByMergeOperation",value:function(t){if(this.start.isEqual(t.targetPosition)&&this.end.isEqual(t.deletionPosition))return new e(this.start);var n=this.start._getTransformedByMergeOperation(t),r=this.end._getTransformedByMergeOperation(t);return n.root!=r.root&&(r=this.end.getShiftedBy(-1)),n.isAfter(r)?(t.sourcePosition.isBefore(t.targetPosition)?(n=to._createAt(r)).offset=0:(t.deletionPosition.isEqual(n)||(r=t.deletionPosition),n=t.targetPosition),new e(n,r)):new e(n,r)}},{key:"_getTransformedByInsertion",value:function(t,n){var r=arguments.length>2&&void 0!==arguments[2]&&arguments[2];if(r&&this.containsPosition(t))return[new e(this.start,t),new e(t.getShiftedBy(n),this.end._getTransformedByInsertion(t,n))];var i=new e(this.start,this.end);return i.start=i.start._getTransformedByInsertion(t,n),i.end=i.end._getTransformedByInsertion(t,n),[i]}},{key:"_getTransformedByMove",value:function(t,n,r){var i=arguments.length>3&&void 0!==arguments[3]&&arguments[3];if(this.isCollapsed){var o=this.start._getTransformedByMove(t,n,r);return[new e(o)]}var a,s=e._createFromPositionAndShift(t,r),l=n._getTransformedByDeletion(t,r);if(this.containsPosition(n)&&!i&&(s.containsPosition(this.start)||s.containsPosition(this.end))){var u=this.start._getTransformedByMove(t,n,r),c=this.end._getTransformedByMove(t,n,r);return[new e(u,c)]}var f=this.getDifference(s),d=null,h=this.getIntersection(s);if(1==f.length?d=new e(f[0].start._getTransformedByDeletion(t,r),f[0].end._getTransformedByDeletion(t,r)):2==f.length&&(d=new e(this.start,this.end._getTransformedByDeletion(t,r))),a=d?d._getTransformedByInsertion(l,r,null!==h||i):[],h){var p=new e(h.start._getCombined(s.start,l),h.end._getCombined(s.start,l));2==a.length?a.splice(1,0,p):a.push(p)}return a}},{key:"_getTransformedByDeletion",value:function(t,n){var r=this.start._getTransformedByDeletion(t,n),i=this.end._getTransformedByDeletion(t,n);return null==r&&null==i?null:(null==r&&(r=t),null==i&&(i=t),new e(r,i))}},{key:"isCollapsed",get:function(){return this.start.isEqual(this.end)}},{key:"isFlat",get:function(){return"same"==$t(this.start.getParentPath(),this.end.getParentPath())}},{key:"root",get:function(){return this.start.root}}],[{key:"_createFromPositionAndShift",value:function(e,t){var n=e,r=e.getShiftedBy(t);return t>0?new this(n,r):new this(r,n)}},{key:"_createIn",value:function(e){return new this(to._createAt(e,0),to._createAt(e,e.maxOffset))}},{key:"_createOn",value:function(e){return this._createFromPositionAndShift(to._createBefore(e),e.offsetSize)}},{key:"_createFromRanges",value:function(e){if(0===e.length)throw new It.b("range-create-from-ranges-empty-array: At least one range has to be passed.",null);if(1==e.length)return e[0].clone();var t=e[0];e.sort((function(e,t){return e.start.isAfter(t.start)?1:-1}));var n=e.indexOf(t),r=new this(t.start,t.end);if(n>0)for(var i=n-1;e[i].end.isEqual(r.start);i++)r.start=to._createAt(e[i].start);for(var o=n+1;o<e.length&&e[o].start.isEqual(r.end);o++)r.end=to._createAt(e[o].end);return r}},{key:"fromJSON",value:function(e,t){return new this(to.fromJSON(e.start,t),to.fromJSON(e.end,t))}}]),e}(),ro=function(){function e(){var t=this;f(this,e),this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._viewToModelLengthCallbacks=new Map,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set,this.on("modelToViewPosition",(function(e,n){if(!n.viewPosition){var r=t._modelToViewMapping.get(n.modelPosition.parent);n.viewPosition=t._findPositionIn(r,n.modelPosition.offset)}}),{priority:"low"}),this.on("viewToModelPosition",(function(e,n){if(!n.modelPosition){var r=t.findMappedViewAncestor(n.viewPosition),i=t._viewToModelMapping.get(r),o=t._toModelOffset(n.viewPosition.parent,n.viewPosition.offset,r);n.modelPosition=to._createAt(i,o)}}),{priority:"low"})}return d(e,[{key:"bindElements",value:function(e,t){this._modelToViewMapping.set(e,t),this._viewToModelMapping.set(t,e)}},{key:"unbindViewElement",value:function(e){var t=this.toModelElement(e);if(this._viewToModelMapping.delete(e),this._elementToMarkerNames.has(e)){var n=!0,r=!1,i=void 0;try{for(var o,a=this._elementToMarkerNames.get(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._unboundMarkerNames.add(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}this._modelToViewMapping.get(t)==e&&this._modelToViewMapping.delete(t)}},{key:"unbindModelElement",value:function(e){var t=this.toViewElement(e);this._modelToViewMapping.delete(e),this._viewToModelMapping.get(t)==e&&this._viewToModelMapping.delete(t)}},{key:"bindElementToMarker",value:function(e,t){var n=this._markerNameToElements.get(t)||new Set;n.add(e);var r=this._elementToMarkerNames.get(e)||new Set;r.add(t),this._markerNameToElements.set(t,n),this._elementToMarkerNames.set(e,r)}},{key:"unbindElementFromMarkerName",value:function(e,t){var n=this._markerNameToElements.get(t);n&&(n.delete(e),0==n.size&&this._markerNameToElements.delete(t));var r=this._elementToMarkerNames.get(e);r&&(r.delete(t),0==r.size&&this._elementToMarkerNames.delete(e))}},{key:"flushUnboundMarkerNames",value:function(){var e=Array.from(this._unboundMarkerNames);return this._unboundMarkerNames.clear(),e}},{key:"clearBindings",value:function(){this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set}},{key:"toModelElement",value:function(e){return this._viewToModelMapping.get(e)}},{key:"toViewElement",value:function(e){return this._modelToViewMapping.get(e)}},{key:"toModelRange",value:function(e){return new no(this.toModelPosition(e.start),this.toModelPosition(e.end))}},{key:"toViewRange",value:function(e){return new In(this.toViewPosition(e.start),this.toViewPosition(e.end))}},{key:"toModelPosition",value:function(e){var t={viewPosition:e,mapper:this};return this.fire("viewToModelPosition",t),t.modelPosition}},{key:"toViewPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{isPhantom:!1},n={modelPosition:e,mapper:this,isPhantom:t.isPhantom};return this.fire("modelToViewPosition",n),n.viewPosition}},{key:"markerNameToElements",value:function(e){var t=this._markerNameToElements.get(e);if(!t)return null;var n=new Set,r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;if(l.is("attributeElement")){var u=!0,c=!1,f=void 0;try{for(var d,h=l.getElementsWithSameId()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;n.add(p)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}else n.add(l)}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"registerViewToModelLength",value:function(e,t){this._viewToModelLengthCallbacks.set(e,t)}},{key:"findMappedViewAncestor",value:function(e){for(var t=e.parent;!this._viewToModelMapping.has(t);)t=t.parent;return t}},{key:"_toModelOffset",value:function(e,t,n){if(n!=e)return this._toModelOffset(e.parent,e.index,n)+this._toModelOffset(e,t,e);if(e.is("text"))return t;for(var r=0,i=0;i<t;i++)r+=this.getModelLength(e.getChild(i));return r}},{key:"getModelLength",value:function(e){if(this._viewToModelLengthCallbacks.get(e.name))return this._viewToModelLengthCallbacks.get(e.name)(e);if(this._viewToModelMapping.has(e))return 1;if(e.is("text"))return e.data.length;if(e.is("uiElement"))return 0;var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=e.getChildren()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t+=this.getModelLength(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"_findPositionIn",value:function(e,t){var n,r=0,i=0,o=0;if(e.is("text"))return new Nn(e,t);for(;i<t;)n=e.getChild(o),i+=r=this.getModelLength(n),o++;return i==t?this._moveViewPositionToTextNode(new Nn(e,o)):this._findPositionIn(n,t-(i-r))}},{key:"_moveViewPositionToTextNode",value:function(e){var t=e.nodeBefore,n=e.nodeAfter;return t instanceof Kt?new Nn(t,t.data.length):n instanceof Kt?new Nn(n,0):e}}]),e}();Yt(ro,zt);var io=function(){function e(){f(this,e),this._consumable=new Map,this._textProxyRegistry=new Map}return d(e,[{key:"add",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e)),this._consumable.has(e)||this._consumable.set(e,new Map),this._consumable.get(e).set(t,!0)}},{key:"consume",value:function(e,t){return t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e)),!!this.test(e,t)&&(this._consumable.get(e).set(t,!1),!0)}},{key:"test",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e));var n=this._consumable.get(e);if(void 0===n)return null;var r=n.get(t);return void 0===r?null:r}},{key:"revert",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e));var n=this.test(e,t);return!1===n?(this._consumable.get(e).set(t,!0),!0):!0!==n&&null}},{key:"_getSymbolForTextProxy",value:function(e){var t=null,n=this._textProxyRegistry.get(e.startOffset);if(n){var r=n.get(e.endOffset);r&&(t=r.get(e.parent))}return t||(t=this._addSymbolForTextProxy(e.startOffset,e.endOffset,e.parent)),t}},{key:"_addSymbolForTextProxy",value:function(e,t,n){var r,i,o=Symbol("textProxySymbol");return(r=this._textProxyRegistry.get(e))||(r=new Map,this._textProxyRegistry.set(e,r)),(i=r.get(t))||(i=new Map,r.set(t,i)),i.set(n,o),o}}]),e}();function oo(e){var t=e.split(":");return t.length>1?t[0]+":"+t[1]:t[0]}var ao=function(){function e(t){f(this,e),this.conversionApi=mn({dispatcher:this},t)}return d(e,[{key:"convertChanges",value:function(e,t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=e.getMarkersToRemove()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;this.convertMarkerRemove(l.name,l.range,n)}}catch(A){i=!0,o=A}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var u=!0,c=!1,f=void 0;try{for(var d,h=e.getChanges()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;"insert"==p.type?this.convertInsert(no._createFromPositionAndShift(p.position,p.length),n):"remove"==p.type?this.convertRemove(p.position,p.length,p.name,n):this.convertAttribute(p.range,p.attributeKey,p.attributeOldValue,p.attributeNewValue,n)}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=this.conversionApi.mapper.flushUnboundMarkerNames()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value,w=t.get(k).getRange();this.convertMarkerRemove(k,w,n),this.convertMarkerAdd(k,w,n)}}catch(A){m=!0,g=A}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}var _=!0,x=!1,T=void 0;try{for(var C,S=e.getMarkersToAdd()[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;this.convertMarkerAdd(E.name,E.range,n)}}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}}},{key:"convertInsert",value:function(e,t){this.conversionApi.writer=t,this.conversionApi.consumable=this._createInsertConsumable(e);var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=s.item,u={item:l,range:no._createFromPositionAndShift(s.previousPosition,s.length)};this._testAndFire("insert",u);var c=!0,f=!1,d=void 0;try{for(var h,p=l.getAttributeKeys()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;u.attributeKey=v,u.attributeOldValue=null,u.attributeNewValue=l.getAttribute(v),this._testAndFire("attribute:".concat(v),u)}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}catch(m){r=!0,i=m}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._clearConversionApi()}},{key:"convertRemove",value:function(e,t,n,r){this.conversionApi.writer=r,this.fire("remove:"+n,{position:e,length:t},this.conversionApi),this._clearConversionApi()}},{key:"convertAttribute",value:function(e,t,n,r,i){this.conversionApi.writer=i,this.conversionApi.consumable=this._createConsumableForRange(e,"attribute:".concat(t));var o=!0,a=!1,s=void 0;try{for(var l,u=e[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f={item:c.item,range:no._createFromPositionAndShift(c.previousPosition,c.length),attributeKey:t,attributeOldValue:n,attributeNewValue:r};this._testAndFire("attribute:".concat(t),f)}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}this._clearConversionApi()}},{key:"convertSelection",value:function(e,t,n){var r=Array.from(t.getMarkersAtPosition(e.getFirstPosition()));if(this.conversionApi.writer=n,this.conversionApi.consumable=this._createSelectionConsumable(e,r),this.fire("selection",{selection:e},this.conversionApi),e.isCollapsed){var i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=u.getRange();if(so(e.getFirstPosition(),u,this.conversionApi.mapper)){var f={item:e,markerName:u.name,markerRange:c};this.conversionApi.consumable.test(e,"addMarker:"+u.name)&&this.fire("addMarker:"+u.name,f,this.conversionApi)}}}catch(b){o=!0,a=b}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var d=!0,h=!1,p=void 0;try{for(var v,m=e.getAttributeKeys()[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value,y={item:e,range:e.getFirstRange(),attributeKey:g,attributeOldValue:null,attributeNewValue:e.getAttribute(g)};this.conversionApi.consumable.test(e,"attribute:"+y.attributeKey)&&this.fire("attribute:"+y.attributeKey+":$text",y,this.conversionApi)}}catch(b){h=!0,p=b}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}this._clearConversionApi()}}},{key:"convertMarkerAdd",value:function(e,t,n){if(t.root.document&&"$graveyard"!=t.root.rootName){this.conversionApi.writer=n;var r="addMarker:"+e,i=new io;if(i.add(t,r),this.conversionApi.consumable=i,this.fire(r,{markerName:e,markerRange:t},this.conversionApi),i.test(t,r)){this.conversionApi.consumable=this._createConsumableForRange(t,r);var o=!0,a=!1,s=void 0;try{for(var l,u=t.getItems()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if(this.conversionApi.consumable.test(c,r)){var f={item:c,range:no._createOn(c),markerName:e,markerRange:t};this.fire(r,f,this.conversionApi)}}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}this._clearConversionApi()}}}},{key:"convertMarkerRemove",value:function(e,t,n){t.root.document&&"$graveyard"!=t.root.rootName&&(this.conversionApi.writer=n,this.fire("removeMarker:"+e,{markerName:e,markerRange:t},this.conversionApi),this._clearConversionApi())}},{key:"_createInsertConsumable",value:function(e){var t=new io,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value.item;t.add(s,"insert");var l=!0,u=!1,c=void 0;try{for(var f,d=s.getAttributeKeys()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;t.add(s,"attribute:"+h)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}catch(p){r=!0,i=p}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"_createConsumableForRange",value:function(e,t){var n=new io,r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;n.add(l,t)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"_createSelectionConsumable",value:function(e,t){var n=new io;n.add(e,"selection");var r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;n.add(e,"addMarker:"+l.name)}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var u=!0,c=!1,f=void 0;try{for(var d,h=e.getAttributeKeys()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;n.add(e,"attribute:"+p)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}return n}},{key:"_testAndFire",value:function(e,t){if(this.conversionApi.consumable.test(t.item,e)){var n=t.item.name||"$text";this.fire(e+":"+n,t,this.conversionApi)}}},{key:"_clearConversionApi",value:function(){delete this.conversionApi.writer,delete this.conversionApi.consumable}}]),e}();function so(e,t,n){var r=t.getRange(),i=Array.from(e.getAncestors());return i.shift(),i.reverse(),!i.some((function(e){if(r.containsItem(e))return!!n.toViewElement(e).getCustomProperty("addHighlight")}))}Yt(ao,zt);var lo=function(){function e(t,n,r){f(this,e),this._lastRangeBackward=!1,this._ranges=[],this._attrs=new Map,t&&this.setTo(t,n,r)}return d(e,[{key:"isEqual",value:function(e){if(this.rangeCount!=e.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(e.anchor)||!this.focus.isEqual(e.focus))return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=!1,l=!0,u=!1,c=void 0;try{for(var f,d=e._ranges[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(a.isEqual(h)){s=!0;break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}if(!s)return!1}}catch(p){n=!0,r=p}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}},{key:"getRanges",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._ranges[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,new no(a.start,a.end);case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"getFirstRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.start.isBefore(e.start)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?new no(e.start,e.end):null}},{key:"getLastRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.end.isAfter(e.end)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?new no(e.start,e.end):null}},{key:"getFirstPosition",value:function(){var e=this.getFirstRange();return e?e.start.clone():null}},{key:"getLastPosition",value:function(){var e=this.getLastRange();return e?e.end.clone():null}},{key:"setTo",value:function(t,n,r){if(null===t)this._setRanges([]);else if(t instanceof e)this._setRanges(t.getRanges(),t.isBackward);else if(t&&"function"==typeof t.getRanges)this._setRanges(t.getRanges(),t.isBackward);else if(t instanceof no)this._setRanges([t],!!n&&!!n.backward);else if(t instanceof to)this._setRanges([new no(t)]);else if(t instanceof Gi){var i,o=!!r&&!!r.backward;if("in"==n)i=no._createIn(t);else if("on"==n)i=no._createOn(t);else{if(void 0===n)throw new It.b("model-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",[this,t]);i=new no(to._createAt(t,n))}this._setRanges([i],o)}else{if(!Zt(t))throw new It.b("model-selection-setTo-not-selectable: Cannot set the selection to the given place.",[this,t]);this._setRanges(t,n&&!!n.backward)}}},{key:"_setRanges",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]&&arguments[1],r=(e=Array.from(e)).some((function(n){if(!(n instanceof no))throw new It.b("model-selection-set-ranges-not-range: Selection range set to an object that is not an instance of model.Range.",[t,e]);return t._ranges.every((function(e){return!e.isEqual(n)}))}));if(e.length!==this._ranges.length||r){this._removeAllRanges();var i=!0,o=!1,a=void 0;try{for(var s,l=e[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;this._pushRange(u)}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}this._lastRangeBackward=!!n,this.fire("change:range",{directChange:!0})}}},{key:"setFocus",value:function(e,t){if(null===this.anchor)throw new It.b("model-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",[this,e]);var n=to._createAt(e,t);if("same"!=n.compareWith(this.focus)){var r=this.anchor;this._ranges.length&&this._popRange(),"before"==n.compareWith(r)?(this._pushRange(new no(n,r)),this._lastRangeBackward=!0):(this._pushRange(new no(r,n)),this._lastRangeBackward=!1),this.fire("change:range",{directChange:!0})}}},{key:"getAttribute",value:function(e){return this._attrs.get(e)}},{key:"getAttributes",value:function(){return this._attrs.entries()}},{key:"getAttributeKeys",value:function(){return this._attrs.keys()}},{key:"hasAttribute",value:function(e){return this._attrs.has(e)}},{key:"removeAttribute",value:function(e){this.hasAttribute(e)&&(this._attrs.delete(e),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}},{key:"setAttribute",value:function(e,t){this.getAttribute(e)!==t&&(this._attrs.set(e,t),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}},{key:"getSelectedElement",value:function(){if(1!==this.rangeCount)return null;var e=this.getFirstRange(),t=e.start.nodeAfter,n=e.end.nodeBefore;return t instanceof Xi&&t==n?t:null}},{key:"is",value:function(e){return"selection"==e||"model:selection"==e}},{key:"getSelectedBlocks",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c,f,d,h,p,v,m,g;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=new WeakSet,n=!0,r=!1,i=void 0,e.prev=4,o=this.getRanges()[Symbol.iterator]();case 6:if(n=(a=o.next()).done){e.next=50;break}if(l=a.value,u=fo(l.start,t),e.t0=u&&ho(u,l),!e.t0){e.next=13;break}return e.next=13,u;case 13:c=!0,f=!1,d=void 0,e.prev=16,h=l.getWalker()[Symbol.iterator]();case 18:if(c=(p=h.next()).done){e.next=28;break}if(v=p.value,m=v.item,e.t1="elementEnd"==v.type&&co(m,t,l),!e.t1){e.next=25;break}return e.next=25,m;case 25:c=!0,e.next=18;break;case 28:e.next=34;break;case 30:e.prev=30,e.t2=e.catch(16),f=!0,d=e.t2;case 34:e.prev=34,e.prev=35,c||null==h.return||h.return();case 37:if(e.prev=37,!f){e.next=40;break}throw d;case 40:return e.finish(37);case 41:return e.finish(34);case 42:if(g=fo(l.end,t),e.t3=g&&!l.end.isTouching(to._createAt(g,0))&&ho(g,l),!e.t3){e.next=47;break}return e.next=47,g;case 47:n=!0,e.next=6;break;case 50:e.next=56;break;case 52:e.prev=52,e.t4=e.catch(4),r=!0,i=e.t4;case 56:e.prev=56,e.prev=57,n||null==o.return||o.return();case 59:if(e.prev=59,!r){e.next=62;break}throw i;case 62:return e.finish(59);case 63:return e.finish(56);case 64:case"end":return e.stop()}}),e,this,[[4,52,56,64],[16,30,34,42],[35,,37,41],[57,,59,63]])}))},{key:"containsEntireContent",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.anchor.root,t=to._createAt(e,0),n=to._createAt(e,"end");return t.isTouching(this.getFirstPosition())&&n.isTouching(this.getLastPosition())}},{key:"_pushRange",value:function(e){this._checkRange(e),this._ranges.push(new no(e.start,e.end))}},{key:"_checkRange",value:function(e){for(var t=0;t<this._ranges.length;t++)if(e.isIntersecting(this._ranges[t]))throw new It.b("model-selection-range-intersects: Trying to add a range that intersects with another range in the selection.",[this,e],{addedRange:e,intersectingRange:this._ranges[t]})}},{key:"_removeAllRanges",value:function(){for(;this._ranges.length>0;)this._popRange()}},{key:"_popRange",value:function(){this._ranges.pop()}},{key:"anchor",get:function(){if(this._ranges.length>0){var e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.end:e.start}return null}},{key:"focus",get:function(){if(this._ranges.length>0){var e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.start:e.end}return null}},{key:"isCollapsed",get:function(){return 1===this._ranges.length&&this._ranges[0].isCollapsed}},{key:"rangeCount",get:function(){return this._ranges.length}},{key:"isBackward",get:function(){return!this.isCollapsed&&this._lastRangeBackward}}]),e}();function uo(e,t){return!t.has(e)&&(t.add(e),e.document.model.schema.isBlock(e)&&e.parent)}function co(e,t,n){return uo(e,t)&&ho(e,n)}function fo(e,t){var n=e.parent.document.model.schema,r=e.parent.getAncestors({parentFirst:!0,includeSelf:!0}),i=!1,o=r.find((function(e){return!i&&!(i=n.isLimit(e))&&uo(e,t)}));return r.forEach((function(e){return t.add(e)})),o}function ho(e,t){var n=function(e){for(var t=e.document.model.schema,n=e.parent;n;){if(t.isBlock(n))return n;n=n.parent}}(e);return!n||!t.containsRange(no._createOn(n),!0)}Yt(lo,zt);var po=function(e){function t(e,n){var r;return f(this,t),r=h(this,p(t).call(this,e,n)),vo.call(o(r)),r}return v(t,e),d(t,[{key:"detach",value:function(){this.stopListening()}},{key:"is",value:function(e){return"liveRange"==e||"model:liveRange"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toRange",value:function(){return new no(this.start,this.end)}}],[{key:"fromRange",value:function(e){return new t(e.start,e.end)}}]),t}(no);function vo(){var e=this;this.listenTo(this.root.document.model,"applyOperation",(function(t,n){var r=n[0];r.isDocumentOperation&&mo.call(e,r)}),{priority:"low"})}function mo(e){var t=this.getTransformedByOperation(e),n=no._createFromRanges(t),r=!n.isEqual(this),i=function(e,t){switch(t.type){case"insert":return e.containsPosition(t.position);case"move":case"remove":case"reinsert":case"merge":return e.containsPosition(t.sourcePosition)||e.start.isEqual(t.sourcePosition)||e.containsPosition(t.targetPosition);case"split":return e.containsPosition(t.splitPosition)||e.containsPosition(t.insertionPosition)}return!1}(this,e),o=null;if(r){"$graveyard"==n.root.rootName&&(o="remove"==e.type?e.sourcePosition:e.deletionPosition);var a=this.toRange();this.start=n.start,this.end=n.end,this.fire("change:range",a,{deletionPosition:o})}else i&&this.fire("change:content",this.toRange(),{deletionPosition:o})}Yt(po,zt);var go="selection:",yo=function(){function e(t){f(this,e),this._selection=new bo(t),this._selection.delegate("change:range").to(this),this._selection.delegate("change:attribute").to(this)}return d(e,[{key:"getRanges",value:function(){return this._selection.getRanges()}},{key:"getFirstPosition",value:function(){return this._selection.getFirstPosition()}},{key:"getLastPosition",value:function(){return this._selection.getLastPosition()}},{key:"getFirstRange",value:function(){return this._selection.getFirstRange()}},{key:"getLastRange",value:function(){return this._selection.getLastRange()}},{key:"getSelectedBlocks",value:function(){return this._selection.getSelectedBlocks()}},{key:"getSelectedElement",value:function(){return this._selection.getSelectedElement()}},{key:"containsEntireContent",value:function(e){return this._selection.containsEntireContent(e)}},{key:"destroy",value:function(){this._selection.destroy()}},{key:"getAttributeKeys",value:function(){return this._selection.getAttributeKeys()}},{key:"getAttributes",value:function(){return this._selection.getAttributes()}},{key:"getAttribute",value:function(e){return this._selection.getAttribute(e)}},{key:"hasAttribute",value:function(e){return this._selection.hasAttribute(e)}},{key:"refresh",value:function(){this._selection._updateMarkers(),this._selection._updateAttributes(!1)}},{key:"is",value:function(e){return"selection"==e||"model:selection"==e||"documentSelection"==e||"model:documentSelection"==e}},{key:"_setFocus",value:function(e,t){this._selection.setFocus(e,t)}},{key:"_setTo",value:function(e,t,n){this._selection.setTo(e,t,n)}},{key:"_setAttribute",value:function(e,t){this._selection.setAttribute(e,t)}},{key:"_removeAttribute",value:function(e){this._selection.removeAttribute(e)}},{key:"_getStoredAttributes",value:function(){return this._selection._getStoredAttributes()}},{key:"_overrideGravity",value:function(){return this._selection.overrideGravity()}},{key:"_restoreGravity",value:function(e){this._selection.restoreGravity(e)}},{key:"isCollapsed",get:function(){return this._selection.isCollapsed}},{key:"anchor",get:function(){return this._selection.anchor}},{key:"focus",get:function(){return this._selection.focus}},{key:"rangeCount",get:function(){return this._selection.rangeCount}},{key:"hasOwnRange",get:function(){return this._selection.hasOwnRange}},{key:"isBackward",get:function(){return this._selection.isBackward}},{key:"isGravityOverridden",get:function(){return this._selection.isGravityOverridden}},{key:"markers",get:function(){return this._selection.markers}},{key:"_ranges",get:function(){return this._selection._ranges}}],[{key:"_getStoreAttributeKey",value:function(e){return go+e}},{key:"_isStoreAttributeKey",value:function(e){return e.startsWith(go)}}]),e}();Yt(yo,zt);var bo=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this))).markers=new Fn({idProperty:"name"}),n._model=e.model,n._document=e,n._attributePriority=new Map,n._fixGraveyardRangesData=[],n._hasChangedRange=!1,n._overriddenGravityRegister=new Set,n.listenTo(n._model,"applyOperation",(function(e,t){var r=t[0];if(r.isDocumentOperation&&"marker"!=r.type&&"rename"!=r.type&&"noop"!=r.type){for(;n._fixGraveyardRangesData.length;){var i=n._fixGraveyardRangesData.shift(),o=i.liveRange,a=i.sourcePosition;n._fixGraveyardSelection(o,a)}n._hasChangedRange&&(n._hasChangedRange=!1,n.fire("change:range",{directChange:!1}))}}),{priority:"lowest"}),n.on("change:range",(function(){var e=!0,t=!1,r=void 0;try{for(var i,a=n.getRanges()[Symbol.iterator]();!(e=(i=a.next()).done);e=!0){var s=i.value;if(!n._document._validateSelectionRange(s))throw new It.b("document-selection-wrong-position: Range from document selection starts or ends at incorrect position.",o(n),{range:s})}}catch(l){t=!0,r=l}finally{try{e||null==a.return||a.return()}finally{if(t)throw r}}})),n.listenTo(n._model.markers,"update",(function(){return n._updateMarkers()})),n.listenTo(n._document,"change",(function(e,t){!function(e,t){var n=e.document.differ,r=!0,i=!1,o=void 0;try{for(var a,s=function(){var n=a.value;if("insert"!=n.type)return"continue";var r=n.position.parent;n.length===r.maxOffset&&e.enqueueChange(t,(function(e){var t=Array.from(r.getAttributeKeys()).filter((function(e){return e.startsWith(go)})),n=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(n=(a=s.next()).done);n=!0){var l=a.value;e.removeAttribute(l,r)}}catch(u){i=!0,o=u}finally{try{n||null==s.return||s.return()}finally{if(i)throw o}}}))},l=n.getChanges()[Symbol.iterator]();!(r=(a=l.next()).done);r=!0)s()}catch(u){i=!0,o=u}finally{try{r||null==l.return||l.return()}finally{if(i)throw o}}}(n._model,t)})),n}return v(t,e),d(t,[{key:"destroy",value:function(){for(var e=0;e<this._ranges.length;e++)this._ranges[e].detach();this.stopListening()}},{key:"getRanges",value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(!this._ranges.length){e.next=4;break}return e.delegateYield(l(p(t.prototype),"getRanges",this).call(this),"t0",2);case 2:e.next=6;break;case 4:return e.next=6,this._document._getDefaultRange();case 6:case"end":return e.stop()}}),e,this)}))},{key:"getFirstRange",value:function(){return l(p(t.prototype),"getFirstRange",this).call(this)||this._document._getDefaultRange()}},{key:"getLastRange",value:function(){return l(p(t.prototype),"getLastRange",this).call(this)||this._document._getDefaultRange()}},{key:"setTo",value:function(e,n,r){l(p(t.prototype),"setTo",this).call(this,e,n,r),this._updateAttributes(!0)}},{key:"setFocus",value:function(e,n){l(p(t.prototype),"setFocus",this).call(this,e,n),this._updateAttributes(!0)}},{key:"setAttribute",value:function(e,t){if(this._setAttribute(e,t)){var n=[e];this.fire("change:attribute",{attributeKeys:n,directChange:!0})}}},{key:"removeAttribute",value:function(e){if(this._removeAttribute(e)){var t=[e];this.fire("change:attribute",{attributeKeys:t,directChange:!0})}}},{key:"overrideGravity",value:function(){var e=Rt();return this._overriddenGravityRegister.add(e),1===this._overriddenGravityRegister.size&&this._updateAttributes(!0),e}},{key:"restoreGravity",value:function(e){if(!this._overriddenGravityRegister.has(e))throw new It.b("document-selection-gravity-wrong-restore: Attempting to restore the selection gravity for an unknown UID.",this,{uid:e});this._overriddenGravityRegister.delete(e),this.isGravityOverridden||this._updateAttributes(!0)}},{key:"_popRange",value:function(){this._ranges.pop().detach()}},{key:"_pushRange",value:function(e){var t=this._prepareRange(e);t&&this._ranges.push(t)}},{key:"_prepareRange",value:function(e){var t=this;if(this._checkRange(e),e.root!=this._document.graveyard){var n=po.fromRange(e);return n.on("change:range",(function(e,r,i){t._hasChangedRange=!0,n.root==t._document.graveyard&&t._fixGraveyardRangesData.push({liveRange:n,sourcePosition:i.deletionPosition})})),n}}},{key:"_updateMarkers",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._model.markers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.getRange(),l=!0,u=!1,c=void 0;try{for(var f,d=this.getRanges()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;s.containsRange(h,!h.isCollapsed)&&e.push(a)}}catch(k){u=!0,c=k}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}catch(k){n=!0,r=k}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}for(var p=0,v=e;p<v.length;p++){var m=v[p];this.markers.has(m)||this.markers.add(m)}for(var g=0,y=Array.from(this.markers);g<y.length;g++){var b=y[g];e.includes(b)||this.markers.remove(b)}}},{key:"_updateAttributes",value:function(e){var t=$i(this._getSurroundingAttributes()),n=$i(this.getAttributes());if(e)this._attributePriority=new Map,this._attrs=new Map;else{var r=!0,i=!1,o=void 0;try{for(var a,s=this._attributePriority[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=c(l,2),f=u[0];"low"==u[1]&&(this._attrs.delete(f),this._attributePriority.delete(f))}}catch(P){i=!0,o=P}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}this._setAttributesTo(t);var d=[],h=!0,p=!1,v=void 0;try{for(var m,g=this.getAttributes()[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=c(y,2),k=b[0],w=b[1];n.has(k)&&n.get(k)===w||d.push(k)}}catch(P){p=!0,v=P}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}var _=!0,x=!1,T=void 0;try{for(var C,S=n[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value,A=c(E,1)[0];this.hasAttribute(A)||d.push(A)}}catch(P){x=!0,T=P}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}d.length>0&&this.fire("change:attribute",{attributeKeys:d,directChange:!1})}},{key:"_setAttribute",value:function(e,n){var r=!(arguments.length>2&&void 0!==arguments[2])||arguments[2],i=r?"normal":"low";return("low"!=i||"normal"!=this._attributePriority.get(e))&&l(p(t.prototype),"getAttribute",this).call(this,e)!==n&&(this._attrs.set(e,n),this._attributePriority.set(e,i),!0)}},{key:"_removeAttribute",value:function(e){var n=!(arguments.length>1&&void 0!==arguments[1])||arguments[1],r=n?"normal":"low";return("low"!=r||"normal"!=this._attributePriority.get(e))&&(this._attributePriority.set(e,r),!!l(p(t.prototype),"hasAttribute",this).call(this,e)&&(this._attrs.delete(e),!0))}},{key:"_setAttributesTo",value:function(e){var t=new Set,n=!0,r=!1,i=void 0;try{for(var o,a=this.getAttributes()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];e.get(u)!==f&&this._removeAttribute(u,!1)}}catch(w){r=!0,i=w}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}var d=!0,h=!1,p=void 0;try{for(var v,m=e[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value,y=c(g,2),b=y[0],k=y[1];this._setAttribute(b,k,!1)&&t.add(b)}}catch(w){h=!0,p=w}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}return t}},{key:"_getStoredAttributes",value:s.mark((function e(){var t,n,r,i,o,a,l,u;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(t=this.getFirstPosition().parent,!this.isCollapsed||!t.isEmpty){e.next=30;break}n=!0,r=!1,i=void 0,e.prev=5,o=t.getAttributeKeys()[Symbol.iterator]();case 7:if(n=(a=o.next()).done){e.next=16;break}if(!(l=a.value).startsWith(go)){e.next=13;break}return u=l.substr(go.length),e.next=13,[u,t.getAttribute(l)];case 13:n=!0,e.next=7;break;case 16:e.next=22;break;case 18:e.prev=18,e.t0=e.catch(5),r=!0,i=e.t0;case 22:e.prev=22,e.prev=23,n||null==o.return||o.return();case 25:if(e.prev=25,!r){e.next=28;break}throw i;case 28:return e.finish(25);case 29:return e.finish(22);case 30:case"end":return e.stop()}}),e,this,[[5,18,22,30],[23,,25,29]])}))},{key:"_getSurroundingAttributes",value:function(){var e=this.getFirstPosition(),t=this._model.schema,n=null;if(this.isCollapsed){var r=e.textNode?e.textNode:e.nodeBefore,i=e.textNode?e.textNode:e.nodeAfter;if(this.isGravityOverridden||(n=ko(r)),n||(n=ko(i)),!this.isGravityOverridden&&!n)for(var o=r;o&&!n;)n=ko(o=o.previousSibling);if(!n)for(var a=i;a&&!n;)n=ko(a=a.nextSibling);n||(n=this._getStoredAttributes())}else{var s=this.getFirstRange(),l=!0,u=!1,c=void 0;try{for(var f,d=s[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(h.item.is("element")&&t.isObject(h.item))break;if("text"==h.type){n=h.item.getAttributes();break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}return n}},{key:"_fixGraveyardSelection",value:function(e,t){var n=t.clone(),r=this._model.schema.getNearestSelectionRange(n),i=this._ranges.indexOf(e);if(this._ranges.splice(i,1),e.detach(),r){var o=this._prepareRange(r);this._ranges.splice(i,0,o)}}},{key:"isCollapsed",get:function(){return 0===this._ranges.length?this._document._getDefaultRange().isCollapsed:l(p(t.prototype),"isCollapsed",this)}},{key:"anchor",get:function(){return l(p(t.prototype),"anchor",this)||this._document._getDefaultRange().start}},{key:"focus",get:function(){return l(p(t.prototype),"focus",this)||this._document._getDefaultRange().end}},{key:"rangeCount",get:function(){return this._ranges.length?this._ranges.length:1}},{key:"hasOwnRange",get:function(){return this._ranges.length>0}},{key:"isGravityOverridden",get:function(){return!!this._overriddenGravityRegister.size}}]),t}(lo);function ko(e){return e instanceof Ki||e instanceof Qi?e.getAttributes():null}var wo=function(){function e(t){f(this,e),this._dispatchers=t}return d(e,[{key:"add",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._dispatchers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0)e(i.value)}catch(a){n=!0,r=a}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return this}}]),e}(),_o=function(e){return At(e,5)},xo=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"elementToElement",value:function(e){return this.add(function(e){return(e=_o(e)).view=Co(e.view,"container"),function(t){t.on("insert:"+e.model,function(e){return function(t,n,r){var i=e(n.item,r.writer);if(i&&r.consumable.consume(n.item,"insert")){var o=r.mapper.toViewPosition(n.range.start);r.mapper.bindElements(n.item,i),r.writer.insert(o,i)}}}(e.view),{priority:e.converterPriority||"normal"})}}(e))}},{key:"attributeToElement",value:function(e){return this.add(function(e){var t="attribute:"+((e=_o(e)).model.key?e.model.key:e.model);if(e.model.name&&(t+=":"+e.model.name),e.model.values){var n=!0,r=!1,i=void 0;try{for(var o,a=e.model.values[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.view[s]=Co(e.view[s],"attribute")}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}else e.view=Co(e.view,"attribute");var l=So(e);return function(n){n.on(t,function(e){return function(t,n,r){var i=e(n.attributeOldValue,r.writer),o=e(n.attributeNewValue,r.writer);if((i||o)&&r.consumable.consume(n.item,t.name)){var a=r.writer,s=a.document.selection;if(n.item instanceof lo||n.item instanceof yo)a.wrap(s.getFirstRange(),o);else{var l=r.mapper.toViewRange(n.range);null!==n.attributeOldValue&&i&&(l=a.unwrap(l,i)),null!==n.attributeNewValue&&o&&a.wrap(l,o)}}}}(l),{priority:e.converterPriority||"normal"})}}(e))}},{key:"attributeToAttribute",value:function(e){return this.add(function(e){var t="attribute:"+((e=_o(e)).model.key?e.model.key:e.model);if(e.model.name&&(t+=":"+e.model.name),e.model.values){var n=!0,r=!1,i=void 0;try{for(var o,a=e.model.values[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.view[s]=Eo(e.view[s])}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}else e.view=Eo(e.view);var l=So(e);return function(n){n.on(t,function(e){return function(t,n,r){var i=e(n.attributeOldValue,n),o=e(n.attributeNewValue,n);if((i||o)&&r.consumable.consume(n.item,t.name)){var a=r.mapper.toViewElement(n.item),s=r.writer;if(!a)throw new It.b("conversion-attribute-to-attribute-on-text: Trying to convert text node's attribute with attribute-to-attribute converter.",[n,r]);if(null!==n.attributeOldValue&&i)if("class"==i.key){var l=Array.isArray(i.value)?i.value:[i.value],c=!0,f=!1,d=void 0;try{for(var h,p=l[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;s.removeClass(v,a)}}catch(u){f=!0,d=u}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}else if("style"==i.key)for(var m=0,g=Object.keys(i.value);m<g.length;m++){var y=g[m];s.removeStyle(y,a)}else 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s=o.value.inheritAllFrom;s&&(t.allowContentOf.push(s),t.allowWhere.push(s),t.allowAttributesOf.push(s),t.inheritTypesFrom.push(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}(e,n),n}function Wo(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=e[t].allowContentOf[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e[s]&&Xo(e,s).forEach((function(e){e.allowIn.push(t)}))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}delete e[t].allowContentOf}function Yo(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=e[t].allowWhere[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=e[o.value];if(s){var l,c=s.allowIn;(l=e[t].allowIn).push.apply(l,u(c))}}}catch(f){r=!0,i=f}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}delete e[t].allowWhere}function $o(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=e[t].allowAttributesOf[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=e[o.value];if(s){var 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a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l,c=a.value;"string"==typeof c[n]?t[n].push(c[n]):Array.isArray(c[n])&&(l=t[n]).push.apply(l,u(c[n]))}}catch(f){i=!0,o=f}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}function Xo(e,t){var n,r=e[t];return(n=e,Object.keys(n).map((function(e){return n[e]}))).filter((function(e){return e.allowIn.includes(r.name)}))}function Zo(e){return"string"==typeof e?{name:e,getAttributeKeys:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:case"end":return e.stop()}}),e)})),getAttribute:function(){}}:{name:e.is("element")?e.name:"$text",getAttributeKeys:s.mark((function t(){return s.wrap((function(t){for(;;)switch(t.prev=t.next){case 0:return t.delegateYield(e.getAttributeKeys(),"t0",1);case 1:case"end":return t.stop()}}),t)})),getAttribute:function(t){return e.getAttribute(t)}}}function ea(e,t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=t.getAttributeKeys()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;e.checkAttribute(t,l)||n.removeAttribute(l,t)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}var ta=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this._splitParts=new Map,this._modelCursor=null,this.conversionApi=Object.assign({},t),this.conversionApi.convertItem=this._convertItem.bind(this),this.conversionApi.convertChildren=this._convertChildren.bind(this),this.conversionApi.splitToAllowedParent=this._splitToAllowedParent.bind(this),this.conversionApi.getSplitParts=this._getSplitParts.bind(this)}return d(e,[{key:"convert",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:["$root"];this.fire("viewCleanup",e),this._modelCursor=function(e,t){var n,r=!0,i=!1,o=void 0;try{for(var a,s=new Ho(e)[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u={},c=!0,f=!1,d=void 0;try{for(var h,p=l.getAttributeKeys()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;u[v]=l.getAttribute(v)}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}var m=t.createElement(l.name,u);n&&t.append(m,n),n=to._createAt(m,0)}}catch(g){i=!0,o=g}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}(n,t),this.conversionApi.writer=t,this.conversionApi.consumable=Vo.createFrom(e),this.conversionApi.store={};var r=this._convertItem(e,this._modelCursor),i=r.modelRange,o=t.createDocumentFragment();if(i){this._removeEmptyElements();for(var a=0,s=Array.from(this._modelCursor.parent.getChildren());a<s.length;a++){var l=s[a];t.append(l,o)}o.markers=function(e,t){var n=new Set,r=new Map,i=no._createIn(e).getItems(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;"$marker"==c.name&&n.add(c)}}catch(b){a=!0,s=b}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}var f=!0,d=!1,h=void 0;try{for(var p,v=n[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value,g=m.getAttribute("data-name"),y=t.createPositionBefore(m);r.has(g)?r.get(g).end=y.clone():r.set(g,new no(y.clone())),t.remove(m)}}catch(b){d=!0,h=b}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}return r}(o,t)}return this._modelCursor=null,this._splitParts.clear(),this.conversionApi.writer=null,this.conversionApi.store=null,o}},{key:"_convertItem",value:function(e,t){var n=Object.assign({viewItem:e,modelCursor:t,modelRange:null});if(e.is("element")?this.fire("element:"+e.name,n,this.conversionApi):e.is("text")?this.fire("text",n,this.conversionApi):this.fire("documentFragment",n,this.conversionApi),n.modelRange&&!(n.modelRange instanceof no))throw new It.b("view-conversion-dispatcher-incorrect-result: Incorrect conversion result was dropped.",this);return{modelRange:n.modelRange,modelCursor:n.modelCursor}}},{key:"_convertChildren",value:function(e,t){for(var n=new no(t),r=t,i=0,o=Array.from(e.getChildren());i<o.length;i++){var a=o[i],s=this._convertItem(a,r);s.modelRange instanceof no&&(n.end=s.modelRange.end,r=s.modelCursor)}return{modelRange:n,modelCursor:r}}},{key:"_splitToAllowedParent",value:function(e,t){var n=this.conversionApi.schema.findAllowedParent(t,e);if(!n)return null;if(n===t.parent)return{position:t};if(this._modelCursor.parent.getAncestors().includes(n))return null;var r=this.conversionApi.writer.split(t,n),i=[],o=!0,a=!1,s=void 0;try{for(var l,u=r.range.getWalker()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if("elementEnd"==c.type)i.push(c.item);else{var f=i.pop(),d=c.item;this._registerSplitPair(f,d)}}}catch(h){a=!0,s=h}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}return{position:r.position,cursorParent:r.range.end.parent}}},{key:"_registerSplitPair",value:function(e,t){this._splitParts.has(e)||this._splitParts.set(e,[e]);var n=this._splitParts.get(e);this._splitParts.set(t,n),n.push(t)}},{key:"_getSplitParts",value:function(e){return this._splitParts.has(e)?this._splitParts.get(e):[e]}},{key:"_removeEmptyElements",value:function(){var e=!1,t=!0,n=!1,r=void 0;try{for(var i,o=this._splitParts.keys()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;a.isEmpty&&(this.conversionApi.writer.remove(a),this._splitParts.delete(a),e=!0)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}e&&this._removeEmptyElements()}}]),e}();Yt(ta,zt);var na=function(){function e(t,n){var r=this;f(this,e),this.model=t,this.processor=n,this.mapper=new ro,this.downcastDispatcher=new ao({mapper:this.mapper}),this.downcastDispatcher.on("insert:$text",(function(e,t,n){if(n.consumable.consume(t.item,"insert")){var r=n.writer,i=n.mapper.toViewPosition(t.range.start),o=r.createText(t.item.data);r.insert(i,o)}}),{priority:"lowest"}),this.upcastDispatcher=new ta({schema:t.schema}),this.upcastDispatcher.on("text",(function(e,t,n){if(n.schema.checkChild(t.modelCursor,"$text")&&n.consumable.consume(t.viewItem)){var r=n.writer.createText(t.viewItem.data);n.writer.insert(r,t.modelCursor),t.modelRange=no._createFromPositionAndShift(t.modelCursor,r.offsetSize),t.modelCursor=t.modelRange.end}}),{priority:"lowest"}),this.upcastDispatcher.on("element",(function(e,t,n){if(!t.modelRange&&n.consumable.consume(t.viewItem,{name:!0})){var r=n.convertChildren(t.viewItem,t.modelCursor),i=r.modelRange,o=r.modelCursor;t.modelRange=i,t.modelCursor=o}}),{priority:"lowest"}),this.upcastDispatcher.on("documentFragment",(function(e,t,n){if(!t.modelRange&&n.consumable.consume(t.viewItem,{name:!0})){var r=n.convertChildren(t.viewItem,t.modelCursor),i=r.modelRange,o=r.modelCursor;t.modelRange=i,t.modelCursor=o}}),{priority:"lowest"}),this.decorate("init"),this.on("init",(function(){r.fire("ready")}),{priority:"lowest"})}return d(e,[{key:"get",value:function(e){var t=e||{},n=t.rootName,r=void 0===n?"main":n,i=t.trim,o=void 0===i?"empty":i;if(!this._checkIfRootsExists([r]))throw new It.b("datacontroller-get-non-existent-root: Attempting to get data from a non-existing root.",this);var a=this.model.document.getRoot(r);return"empty"!==o||this.model.hasContent(a,{ignoreWhitespaces:!0})?this.stringify(a):""}},{key:"stringify",value:function(e){var t=this.toView(e);return this.processor.toData(t)}},{key:"toView",value:function(e){this.mapper.clearBindings();var t=no._createIn(e),n=new rr,r=new ir(new zn);if(this.mapper.bindElements(e,n),this.downcastDispatcher.convertInsert(t,r),!e.is("documentFragment")){var i=function(e){var t=[],n=e.root.document;if(!n)return[];var r=no._createIn(e),i=!0,o=!1,a=void 0;try{for(var s,l=n.model.markers[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=r.getIntersection(u.getRange());c&&t.push([u.name,c])}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return t}(e),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var f=l.value,d=c(f,2),h=d[0],p=d[1];this.downcastDispatcher.convertMarkerAdd(h,p,r)}}catch(v){a=!0,s=v}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}return n}},{key:"init",value:function(e){var t=this;if(this.model.document.version)throw new It.b("datacontroller-init-document-not-empty: Trying to set initial data to not empty document.",this);var n={};if("string"==typeof e?n.main=e:n=e,!this._checkIfRootsExists(Object.keys(n)))throw new It.b("datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.",this);return this.model.enqueueChange("transparent",(function(e){for(var r=0,i=Object.keys(n);r<i.length;r++){var o=i[r],a=t.model.document.getRoot(o);e.insert(t.parse(n[o],a),a,0)}})),Promise.resolve()}},{key:"set",value:function(e){var t=this,n={};if("string"==typeof e?n.main=e:n=e,!this._checkIfRootsExists(Object.keys(n)))throw new It.b("datacontroller-set-non-existent-root: Attempting to set data on a non-existing root.",this);this.model.enqueueChange("transparent",(function(e){e.setSelection(null),e.removeSelectionAttribute(t.model.document.selection.getAttributeKeys());for(var r=0,i=Object.keys(n);r<i.length;r++){var o=i[r],a=t.model.document.getRoot(o);e.remove(e.createRangeIn(a)),e.insert(t.parse(n[o],a),a,0)}}))}},{key:"parse",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"$root",n=this.processor.toView(e);return this.toModel(n,t)}},{key:"toModel",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"$root";return this.model.change((function(r){return t.upcastDispatcher.convert(e,r,n)}))}},{key:"destroy",value:function(){this.stopListening()}},{key:"_checkIfRootsExists",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(!this.model.document.getRootNames().includes(a))return!1}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}}]),e}();Yt(na,wn);var ra=function(){function e(t,n){f(this,e),this._helpers=new Map,this._downcast=Array.isArray(t)?t:[t],this._createConversionHelpers({name:"downcast",dispatchers:this._downcast,isDowncast:!0}),this._upcast=Array.isArray(n)?n:[n],this._createConversionHelpers({name:"upcast",dispatchers:this._upcast,isDowncast:!1})}return d(e,[{key:"addAlias",value:function(e,t){var n=this._downcast.includes(t);if(!this._upcast.includes(t)&&!n)throw new It.b("conversion-add-alias-dispatcher-not-registered: Trying to register and alias for a dispatcher that nas not been registered.",this);this._createConversionHelpers({name:e,dispatchers:[t],isDowncast:n})}},{key:"for",value:function(e){if(!this._helpers.has(e))throw new It.b("conversion-for-unknown-group: Trying to add a converter to an unknown dispatchers group.",this);return this._helpers.get(e)}},{key:"elementToElement",value:function(e){this.for("downcast").elementToElement(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").elementToElement({model:s,view:l,converterPriority:e.converterPriority})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"attributeToElement",value:function(e){this.for("downcast").attributeToElement(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").elementToAttribute({view:l,model:s,converterPriority:e.converterPriority})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"attributeToAttribute",value:function(e){this.for("downcast").attributeToAttribute(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").attributeToAttribute({view:l,model:s})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"_createConversionHelpers",value:function(e){var t=e.name,n=e.dispatchers,r=e.isDowncast;if(this._helpers.has(t))throw new It.b("conversion-group-exists: Trying to register a group name that has already been registered.",this);var i=r?new xo(n):new Po(n);this._helpers.set(t,i)}}]),e}();function ia(e){var t,n,i,o,a,l,u,c,f;return s.wrap((function(r){for(;;)switch(r.prev=r.next){case 0:if(!e.model.values){r.next=29;break}t=!0,n=!1,i=void 0,r.prev=4,o=e.model.values[Symbol.iterator]();case 6:if(t=(a=o.next()).done){r.next=13;break}return l=a.value,u={key:e.model.key,value:l},c=e.view[l],f=e.upcastAlso?e.upcastAlso[l]:void 0,r.delegateYield(oa(u,c,f),"t0",10);case 10:t=!0,r.next=6;break;case 13:r.next=19;break;case 15:r.prev=15,r.t1=r.catch(4),n=!0,i=r.t1;case 19:r.prev=19,r.prev=20,t||null==o.return||o.return();case 22:if(r.prev=22,!n){r.next=25;break}throw i;case 25:return r.finish(22);case 26:return r.finish(19);case 27:r.next=30;break;case 29:return r.delegateYield(oa(e.model,e.view,e.upcastAlso),"t2",30);case 30:case"end":return r.stop()}}),r,null,[[4,15,19,27],[20,,22,26]])}function oa(e,t,n){var r,i,o,a,l,u;return s.wrap((function(s){for(;;)switch(s.prev=s.next){case 0:return s.next=2,{model:e,view:t};case 2:if(!n){s.next=30;break}n=Array.isArray(n)?n:[n],r=!0,i=!1,o=void 0,s.prev=7,a=n[Symbol.iterator]();case 9:if(r=(l=a.next()).done){s.next=16;break}return u=l.value,s.next=13,{model:e,view:u};case 13:r=!0,s.next=9;break;case 16:s.next=22;break;case 18:s.prev=18,s.t0=s.catch(7),i=!0,o=s.t0;case 22:s.prev=22,s.prev=23,r||null==a.return||a.return();case 25:if(s.prev=25,!i){s.next=28;break}throw o;case 28:return s.finish(25);case 29:return s.finish(22);case 30:case"end":return s.stop()}}),m,null,[[7,18,22,30],[23,,25,29]])}var aa=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"default";f(this,e),this.operations=[],this.type=t}return d(e,[{key:"addOperation",value:function(e){return e.batch=this,this.operations.push(e),e}},{key:"baseVersion",get:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.operations[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(null!==o.baseVersion)return o.baseVersion}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return null}}]),e}(),sa=function(){function e(t){f(this,e),this.baseVersion=t,this.isDocumentOperation=null!==this.baseVersion,this.batch=null}return d(e,[{key:"_validate",value:function(){}},{key:"toJSON",value:function(){var e=Object.assign({},this);return e.__className=this.constructor.className,delete e.batch,delete e.isDocumentOperation,e}}],[{key:"fromJSON",value:function(e){return new this(e.baseVersion)}},{key:"className",get:function(){return"Operation"}}]),e}(),la=function(){function e(t){f(this,e),this.markers=new Map,this._children=new Ji,t&&this._insertChild(0,t)}return d(e,[{key:Symbol.iterator,value:function(){return this.getChildren()}},{key:"is",value:function(e){return"documentFragment"==e||"model:documentFragment"==e}},{key:"getChild",value:function(e){return this._children.getNode(e)}},{key:"getChildren",value:function(){return this._children[Symbol.iterator]()}},{key:"getChildIndex",value:function(e){return this._children.getNodeIndex(e)}},{key:"getChildStartOffset",value:function(e){return this._children.getNodeStartOffset(e)}},{key:"getPath",value:function(){return[]}},{key:"getNodeByPath",value:function(e){var t=this,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t=t.getChild(t.offsetToIndex(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"offsetToIndex",value:function(e){return this._children.offsetToIndex(e)}},{key:"toJSON",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._children[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e.push(a.toJSON())}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"_appendChild",value:function(e){this._insertChild(this.childCount,e)}},{key:"_insertChild",value:function(e,t){var n=function(e){return"string"==typeof e?[new Qi(e)]:(Zt(e)||(e=[e]),Array.from(e).map((function(e){return"string"==typeof e?new Qi(e):e instanceof Ki?new Qi(e.data,e.getAttributes()):e})))}(t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;null!==l.parent&&l._remove(),l.parent=this}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._children._insertNodes(e,n)}},{key:"_removeChildren",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1,n=this._children._removeNodes(e,t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.parent=null}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"childCount",get:function(){return this._children.length}},{key:"maxOffset",get:function(){return this._children.maxOffset}},{key:"isEmpty",get:function(){return 0===this.childCount}},{key:"root",get:function(){return this}},{key:"parent",get:function(){return null}}],[{key:"fromJSON",value:function(t){var n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.name?n.push(Xi.fromJSON(l)):n.push(Qi.fromJSON(l))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return new e(n)}}]),e}();function ua(e,t){var n=(t=da(t)).reduce((function(e,t){return e+t.offsetSize}),0),r=e.parent;pa(e);var i=e.index;return r._insertChild(i,t),ha(r,i+t.length),ha(r,i),new no(e,e.getShiftedBy(n))}function ca(e){if(!e.isFlat)throw new It.b("operation-utils-remove-range-not-flat: Trying to remove a range which starts and ends in different element.",this);var t=e.start.parent;pa(e.start),pa(e.end);var n=t._removeChildren(e.start.index,e.end.index-e.start.index);return ha(t,e.start.index),n}function fa(e,t){if(!e.isFlat)throw new It.b("operation-utils-move-range-not-flat: Trying to move a range which starts and ends in different element.",this);var n=ca(e);return ua(t=t._getTransformedByDeletion(e.start,e.end.offset-e.start.offset),n)}function da(e){var t=[];e instanceof Array||(e=[e]);for(var n=0;n<e.length;n++)if("string"==typeof e[n])t.push(new Qi(e[n]));else if(e[n]instanceof Ki)t.push(new Qi(e[n].data,e[n].getAttributes()));else if(e[n]instanceof la||e[n]instanceof Ji){var r=!0,i=!1,o=void 0;try{for(var a,s=e[n][Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;t.push(l)}}catch(d){i=!0,o=d}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else e[n]instanceof Gi&&t.push(e[n]);for(var u=1;u<t.length;u++){var c=t[u],f=t[u-1];c instanceof Qi&&f instanceof Qi&&va(c,f)&&(t.splice(u-1,2,new Qi(f.data+c.data,f.getAttributes())),u--)}return t}function ha(e,t){var n=e.getChild(t-1),r=e.getChild(t);if(n&&r&&n.is("text")&&r.is("text")&&va(n,r)){var i=new Qi(n.data+r.data,n.getAttributes());e._removeChildren(t-1,2),e._insertChild(t-1,i)}}function pa(e){var t=e.textNode,n=e.parent;if(t){var r=e.offset-t.startOffset,i=t.index;n._removeChildren(i,1);var o=new Qi(t.data.substr(0,r),t.getAttributes()),a=new Qi(t.data.substr(r),t.getAttributes());n._insertChild(i,[o,a])}}function va(e,t){var n=e.getAttributes(),r=t.getAttributes(),i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if(u[1]!==t.getAttribute(u[0]))return!1;r.next()}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return r.next().done}var ma=function(e,t){return li(e,t)},ga=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).range=e.clone(),a.key=n,a.oldValue=void 0===r?null:r,a.newValue=void 0===i?null:i,a}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.range,this.key,this.oldValue,this.newValue,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.range,this.key,this.newValue,this.oldValue,this.baseVersion+1)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.range=this.range.toJSON(),e}},{key:"_validate",value:function(){if(!this.range.isFlat)throw new It.b("attribute-operation-range-not-flat: The range to change is not flat.",this);var e=!0,t=!1,n=void 0;try{for(var r,i=this.range.getItems({shallow:!0})[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(null!==this.oldValue&&!ma(o.getAttribute(this.key),this.oldValue))throw new It.b("attribute-operation-wrong-old-value: Changed node has different attribute value than operation's old attribute value.",this,{item:o,key:this.key,value:this.oldValue});if(null===this.oldValue&&null!==this.newValue&&o.hasAttribute(this.key))throw new It.b("attribute-operation-attribute-exists: The attribute with given key already exists.",this,{node:o,key:this.key})}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"_execute",value:function(){ma(this.oldValue,this.newValue)||function(e,t,n){pa(e.start),pa(e.end);var r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems({shallow:!0})[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=l.is("textProxy")?l.textNode:l;null!==n?u._setAttribute(t,n):u._removeAttribute(t),ha(u.parent,u.index)}}catch(c){i=!0,o=c}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}ha(e.end.parent,e.end.index)}(this.range,this.key,this.newValue)}},{key:"type",get:function(){return null===this.oldValue?"addAttribute":null===this.newValue?"removeAttribute":"changeAttribute"}}],[{key:"fromJSON",value:function(e,n){return new t(no.fromJSON(e.range,n),e.key,e.oldValue,e.newValue,e.baseVersion)}},{key:"className",get:function(){return"AttributeOperation"}}]),t}(sa),ya=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,null))).sourcePosition=e.clone(),r.howMany=n,r}return v(t,e),d(t,[{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=this.sourcePosition.toJSON(),e}},{key:"_validate",value:function(){if(this.sourcePosition.root.document)throw new It.b("detach-operation-on-document-node: Cannot detach document node.",this)}},{key:"_execute",value:function(){ca(no._createFromPositionAndShift(this.sourcePosition,this.howMany))}},{key:"type",get:function(){return"detach"}}],[{key:"className",get:function(){return"DetachOperation"}}]),t}(sa),ba=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).sourcePosition=e.clone(),o.sourcePosition.stickiness="toNext",o.howMany=n,o.targetPosition=r.clone(),o.targetPosition.stickiness="toNone",o}return v(t,e),d(t,[{key:"clone",value:function(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.baseVersion)}},{key:"getMovedRangeStart",value:function(){return this.targetPosition._getTransformedByDeletion(this.sourcePosition,this.howMany)}},{key:"getReversed",value:function(){var e=this.sourcePosition._getTransformedByInsertion(this.targetPosition,this.howMany);return new this.constructor(this.getMovedRangeStart(),this.howMany,e,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.sourcePosition.parent,t=this.targetPosition.parent,n=this.sourcePosition.offset,r=this.targetPosition.offset;if(n+this.howMany>e.maxOffset)throw new It.b("move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.",this);if(e===t&&n<r&&r<n+this.howMany)throw new It.b("move-operation-range-into-itself: Trying to move a range of nodes to the inside of that range.",this);if(this.sourcePosition.root==this.targetPosition.root&&"prefix"==$t(this.sourcePosition.getParentPath(),this.targetPosition.getParentPath())){var i=this.sourcePosition.path.length-1;if(this.targetPosition.path[i]>=n&&this.targetPosition.path[i]<n+this.howMany)throw new It.b("move-operation-node-into-itself: Trying to move a range of nodes into one of nodes from that range.",this)}}},{key:"_execute",value:function(){fa(no._createFromPositionAndShift(this.sourcePosition,this.howMany),this.targetPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=this.sourcePosition.toJSON(),e.targetPosition=this.targetPosition.toJSON(),e}},{key:"type",get:function(){return"$graveyard"==this.targetPosition.root.rootName?"remove":"$graveyard"==this.sourcePosition.root.rootName?"reinsert":"move"}}],[{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.sourcePosition,t),r=to.fromJSON(e.targetPosition,t);return new this(n,e.howMany,r,e.baseVersion)}},{key:"className",get:function(){return"MoveOperation"}}]),t}(sa),ka=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,r))).position=e.clone(),i.position.stickiness="toNone",i.nodes=new Ji(da(n)),i.shouldReceiveAttributes=!1,i}return v(t,e),d(t,[{key:"clone",value:function(){var e=new Ji(u(this.nodes).map((function(e){return e._clone(!0)}))),n=new t(this.position,e,this.baseVersion);return n.shouldReceiveAttributes=this.shouldReceiveAttributes,n}},{key:"getReversed",value:function(){var e=this.position.root.document.graveyard,t=new to(e,[0]);return new ba(this.position,this.nodes.maxOffset,t,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.position.parent;if(!e||e.maxOffset<this.position.offset)throw new It.b("insert-operation-position-invalid: Insertion position is invalid.",this)}},{key:"_execute",value:function(){var e=this.nodes;this.nodes=new Ji(u(e).map((function(e){return e._clone(!0)}))),ua(this.position,e)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.position=this.position.toJSON(),e.nodes=this.nodes.toJSON(),e}},{key:"type",get:function(){return"insert"}},{key:"howMany",get:function(){return this.nodes.maxOffset}}],[{key:"fromJSON",value:function(e,n){var r=[],i=!0,o=!1,a=void 0;try{for(var s,l=e.nodes[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;u.name?r.push(Xi.fromJSON(u)):r.push(Qi.fromJSON(u))}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var c=new t(to.fromJSON(e.position,n),r,e.baseVersion);return c.shouldReceiveAttributes=e.shouldReceiveAttributes,c}},{key:"className",get:function(){return"InsertOperation"}}]),t}(sa),wa=function(e){function t(e,n,r,i,o,a){var s;return f(this,t),(s=h(this,p(t).call(this,a))).name=e,s.oldRange=n?n.clone():null,s.newRange=r?r.clone():null,s.affectsData=o,s._markers=i,s}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.name,this.oldRange,this.newRange,this._markers,this.affectsData,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.name,this.newRange,this.oldRange,this._markers,this.affectsData,this.baseVersion+1)}},{key:"_execute",value:function(){var e=this.newRange?"_set":"_remove";this._markers[e](this.name,this.newRange,!0,this.affectsData)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return this.oldRange&&(e.oldRange=this.oldRange.toJSON()),this.newRange&&(e.newRange=this.newRange.toJSON()),delete e._markers,e}},{key:"type",get:function(){return"marker"}}],[{key:"fromJSON",value:function(e,n){return new t(e.name,e.oldRange?no.fromJSON(e.oldRange,n):null,e.newRange?no.fromJSON(e.newRange,n):null,n.model.markers,e.affectsData,e.baseVersion)}},{key:"className",get:function(){return"MarkerOperation"}}]),t}(sa),_a=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).position=e,o.position.stickiness="toNext",o.oldName=n,o.newName=r,o}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.position.clone(),this.oldName,this.newName,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.position.clone(),this.newName,this.oldName,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.position.nodeAfter;if(!(e instanceof Xi))throw new It.b("rename-operation-wrong-position: Given position is invalid or node after it is not an instance of Element.",this);if(e.name!==this.oldName)throw new It.b("rename-operation-wrong-name: Element to change has different name than operation's old name.",this)}},{key:"_execute",value:function(){this.position.nodeAfter.name=this.newName}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.position=this.position.toJSON(),e}},{key:"type",get:function(){return"rename"}}],[{key:"fromJSON",value:function(e,n){return new t(to.fromJSON(e.position,n),e.oldName,e.newName,e.baseVersion)}},{key:"className",get:function(){return"RenameOperation"}}]),t}(sa),xa=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).root=e,a.key=n,a.oldValue=r,a.newValue=i,a}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.root,this.key,this.oldValue,this.newValue,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.root,this.key,this.newValue,this.oldValue,this.baseVersion+1)}},{key:"_validate",value:function(){if(this.root!=this.root.root||this.root.is("documentFragment"))throw new It.b("rootattribute-operation-not-a-root: The element to change is not a root element.",this,{root:this.root,key:this.key});if(null!==this.oldValue&&this.root.getAttribute(this.key)!==this.oldValue)throw new It.b("rootattribute-operation-wrong-old-value: Changed node has different attribute value than operation's old attribute value.",this,{root:this.root,key:this.key});if(null===this.oldValue&&null!==this.newValue&&this.root.hasAttribute(this.key))throw new It.b("rootattribute-operation-attribute-exists: The attribute with given key already exists.",this,{root:this.root,key:this.key})}},{key:"_execute",value:function(){null!==this.newValue?this.root._setAttribute(this.key,this.newValue):this.root._removeAttribute(this.key)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.root=this.root.toJSON(),e}},{key:"type",get:function(){return null===this.oldValue?"addRootAttribute":null===this.newValue?"removeRootAttribute":"changeRootAttribute"}}],[{key:"fromJSON",value:function(e,n){if(!n.getRoot(e.root))throw new It.b("rootattribute-operation-fromjson-no-root: Cannot create RootAttributeOperation. Root with specified name does not exist.",this,{rootName:e.root});return new t(n.getRoot(e.root),e.key,e.oldValue,e.newValue,e.baseVersion)}},{key:"className",get:function(){return"RootAttributeOperation"}}]),t}(sa),Ta=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).sourcePosition=e.clone(),a.sourcePosition.stickiness="toPrevious",a.howMany=n,a.targetPosition=r.clone(),a.targetPosition.stickiness="toNext",a.graveyardPosition=i.clone(),a}return v(t,e),d(t,[{key:"clone",value:function(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.graveyardPosition,this.baseVersion)}},{key:"getReversed",value:function(){var e=this.targetPosition._getTransformedByMergeOperation(this),t=this.sourcePosition.path.slice(0,-1),n=new to(this.sourcePosition.root,t)._getTransformedByMergeOperation(this),r=new Ca(e,this.howMany,this.graveyardPosition,this.baseVersion+1);return r.insertionPosition=n,r}},{key:"_validate",value:function(){var e=this.sourcePosition.parent,t=this.targetPosition.parent;if(!e.parent)throw new It.b("merge-operation-source-position-invalid: Merge source position is invalid.",this);if(!t.parent)throw new It.b("merge-operation-target-position-invalid: Merge target position is invalid.",this);if(this.howMany!=e.maxOffset)throw new It.b("merge-operation-how-many-invalid: Merge operation specifies wrong number of nodes to move.",this)}},{key:"_execute",value:function(){var e=this.sourcePosition.parent;fa(no._createIn(e),this.targetPosition),fa(no._createOn(e),this.graveyardPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=e.sourcePosition.toJSON(),e.targetPosition=e.targetPosition.toJSON(),e.graveyardPosition=e.graveyardPosition.toJSON(),e}},{key:"type",get:function(){return"merge"}},{key:"deletionPosition",get:function(){return new to(this.sourcePosition.root,this.sourcePosition.path.slice(0,-1))}},{key:"movedRange",get:function(){var e=this.sourcePosition.getShiftedBy(Number.POSITIVE_INFINITY);return new no(this.sourcePosition,e)}}],[{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.sourcePosition,t),r=to.fromJSON(e.targetPosition,t),i=to.fromJSON(e.graveyardPosition,t);return new this(n,e.howMany,r,i,e.baseVersion)}},{key:"className",get:function(){return"MergeOperation"}}]),t}(sa),Ca=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).splitPosition=e.clone(),o.splitPosition.stickiness="toNext",o.howMany=n,o.insertionPosition=t.getInsertionPosition(e),o.insertionPosition.stickiness="toNone",o.graveyardPosition=r?r.clone():null,o.graveyardPosition&&(o.graveyardPosition.stickiness="toNext"),o}return v(t,e),d(t,[{key:"clone",value:function(){var e=new this.constructor(this.splitPosition,this.howMany,this.graveyardPosition,this.baseVersion);return e.insertionPosition=this.insertionPosition,e}},{key:"getReversed",value:function(){var e=this.splitPosition.root.document.graveyard,t=new to(e,[0]);return new Ta(this.moveTargetPosition,this.howMany,this.splitPosition,t,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.splitPosition.parent,t=this.splitPosition.offset;if(!e||e.maxOffset<t)throw new It.b("split-operation-position-invalid: Split position is invalid.",this);if(!e.parent)throw new It.b("split-operation-split-in-root: Cannot split root element.",this);if(this.howMany!=e.maxOffset-this.splitPosition.offset)throw new It.b("split-operation-how-many-invalid: Split operation specifies wrong number of nodes to move.",this);if(this.graveyardPosition&&!this.graveyardPosition.nodeAfter)throw new It.b("split-operation-graveyard-position-invalid: Graveyard position invalid.",this)}},{key:"_execute",value:function(){var e=this.splitPosition.parent;if(this.graveyardPosition)fa(no._createFromPositionAndShift(this.graveyardPosition,1),this.insertionPosition);else{var t=e._clone();ua(this.insertionPosition,t)}fa(new no(to._createAt(e,this.splitPosition.offset),to._createAt(e,e.maxOffset)),this.moveTargetPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.splitPosition=this.splitPosition.toJSON(),e.insertionPosition=this.insertionPosition.toJSON(),this.graveyardPosition&&(e.graveyardPosition=this.graveyardPosition.toJSON()),e}},{key:"type",get:function(){return"split"}},{key:"moveTargetPosition",get:function(){var e=this.insertionPosition.path.slice();return e.push(0),new to(this.insertionPosition.root,e)}},{key:"movedRange",get:function(){var e=this.splitPosition.getShiftedBy(Number.POSITIVE_INFINITY);return new no(this.splitPosition,e)}}],[{key:"getInsertionPosition",value:function(e){var t=e.path.slice(0,-1);return t[t.length-1]++,new to(e.root,t)}},{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.splitPosition,t),r=to.fromJSON(e.insertionPosition,t),i=e.graveyardPosition?to.fromJSON(e.graveyardPosition,t):null,o=new this(n,e.howMany,i,e.baseVersion);return o.insertionPosition=r,o}},{key:"className",get:function(){return"SplitOperation"}}]),t}(sa),Sa=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"main";return f(this,t),(r=h(this,p(t).call(this,n)))._doc=e,r.rootName=i,r}return v(t,e),d(t,[{key:"is",value:function(e,n){var r=e.replace("model:","");return n?"rootElement"==r&&n==this.name||l(p(t.prototype),"is",this).call(this,e,n):"rootElement"==r||l(p(t.prototype),"is",this).call(this,e)}},{key:"toJSON",value:function(){return this.rootName}},{key:"document",get:function(){return this._doc}}]),t}(Xi),Ea=function(){function e(t,n){f(this,e),this.model=t,this.batch=n}return d(e,[{key:"createText",value:function(e,t){return new Qi(e,t)}},{key:"createElement",value:function(e,t){return new Xi(e,t)}},{key:"createDocumentFragment",value:function(){return new la}},{key:"insert",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:0;if(this._assertWriterUsedCorrectly(),!(e instanceof Qi&&""==e.data)){var r=to._createAt(t,n);if(e.parent){if(Na(e.root,r.root))return void this.move(no._createOn(e),r);if(e.root.document)throw new It.b("model-writer-insert-forbidden-move: Cannot move a node from a document to a different tree. It is forbidden to move a node that was already in a document outside of it.",this);this.remove(e)}var i=r.root.document?r.root.document.version:null,o=new ka(r,e,i);if(e instanceof Qi&&(o.shouldReceiveAttributes=!0),this.batch.addOperation(o),this.model.applyOperation(o),e instanceof la){var a=!0,s=!1,l=void 0;try{for(var u,f=e.markers[Symbol.iterator]();!(a=(u=f.next()).done);a=!0){var d=u.value,h=c(d,2),p=h[0],v=h[1],m=to._createAt(v.root,0),g={range:new no(v.start._getCombined(m,r),v.end._getCombined(m,r)),usingOperation:!0,affectsData:!0};this.model.markers.has(p)?this.updateMarker(p,g):this.addMarker(p,g)}}catch(y){s=!0,l=y}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}}}}},{key:"insertText",value:function(e,t,n,r){t instanceof la||t instanceof Xi||t instanceof to?this.insert(this.createText(e),t,n):this.insert(this.createText(e,t),n,r)}},{key:"insertElement",value:function(e,t,n,r){t instanceof la||t instanceof Xi||t instanceof to?this.insert(this.createElement(e),t,n):this.insert(this.createElement(e,t),n,r)}},{key:"append",value:function(e,t){this.insert(e,t,"end")}},{key:"appendText",value:function(e,t,n){t instanceof la||t instanceof Xi?this.insert(this.createText(e),t,"end"):this.insert(this.createText(e,t),n,"end")}},{key:"appendElement",value:function(e,t,n){t instanceof la||t instanceof Xi?this.insert(this.createElement(e),t,"end"):this.insert(this.createElement(e,t),n,"end")}},{key:"setAttribute",value:function(e,t,n){if(this._assertWriterUsedCorrectly(),n instanceof no){var r=n.getMinimalFlatRanges(),i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0)Aa(this,e,t,s.value)}catch(u){o=!0,a=u}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}else Pa(this,e,t,n)}},{key:"setAttributes",value:function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=$i(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];this.setAttribute(u,f,t)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}},{key:"removeAttribute",value:function(e,t){if(this._assertWriterUsedCorrectly(),t instanceof no){var n=t.getMinimalFlatRanges(),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)Aa(this,e,null,a.value)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else Pa(this,e,null,t)}},{key:"clearAttributes",value:function(e){var t=this;this._assertWriterUsedCorrectly();var n=function(e){var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t.removeAttribute(s,e)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}};if(e instanceof no){var r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)n(a.value)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else n(e)}},{key:"move",value:function(e,t,n){if(this._assertWriterUsedCorrectly(),!(e instanceof no))throw new It.b("writer-move-invalid-range: Invalid range to move.",this);if(!e.isFlat)throw new It.b("writer-move-range-not-flat: Range to move is not flat.",this);var r=to._createAt(t,n);if(!r.isEqual(e.start)){if(this._addOperationForAffectedMarkers("move",e),!Na(e.root,r.root))throw new It.b("writer-move-different-document: Range is going to be moved between different documents.",this);var i=e.root.document?e.root.document.version:null,o=new ba(e.start,e.end.offset-e.start.offset,r,i);this.batch.addOperation(o),this.model.applyOperation(o)}}},{key:"remove",value:function(e){this._assertWriterUsedCorrectly();var t=(e instanceof no?e:no._createOn(e)).getMinimalFlatRanges().reverse(),n=!0,r=!1,i=void 0;try{for(var o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._addOperationForAffectedMarkers("move",s),Oa(s.start,s.end.offset-s.start.offset,this.batch,this.model)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}},{key:"merge",value:function(e){this._assertWriterUsedCorrectly();var t=e.nodeBefore,n=e.nodeAfter;if(this._addOperationForAffectedMarkers("merge",e),!(t instanceof Xi))throw new It.b("writer-merge-no-element-before: Node before merge position must be an element.",this);if(!(n instanceof Xi))throw new It.b("writer-merge-no-element-after: Node after merge position must be an element.",this);e.root.document?this._merge(e):this._mergeDetached(e)}},{key:"createPositionFromPath",value:function(e,t,n){return this.model.createPositionFromPath(e,t,n)}},{key:"createPositionAt",value:function(e,t){return this.model.createPositionAt(e,t)}},{key:"createPositionAfter",value:function(e){return this.model.createPositionAfter(e)}},{key:"createPositionBefore",value:function(e){return this.model.createPositionBefore(e)}},{key:"createRange",value:function(e,t){return this.model.createRange(e,t)}},{key:"createRangeIn",value:function(e){return this.model.createRangeIn(e)}},{key:"createRangeOn",value:function(e){return this.model.createRangeOn(e)}},{key:"createSelection",value:function(e,t,n){return this.model.createSelection(e,t,n)}},{key:"_mergeDetached",value:function(e){var t=e.nodeBefore,n=e.nodeAfter;this.move(no._createIn(n),to._createAt(t,"end")),this.remove(n)}},{key:"_merge",value:function(e){var t=to._createAt(e.nodeBefore,"end"),n=to._createAt(e.nodeAfter,0),r=e.root.document.graveyard,i=new to(r,[0]),o=e.root.document.version,a=new Ta(n,e.nodeAfter.maxOffset,t,i,o);this.batch.addOperation(a),this.model.applyOperation(a)}},{key:"rename",value:function(e,t){if(this._assertWriterUsedCorrectly(),!(e instanceof Xi))throw new It.b("writer-rename-not-element-instance: Trying to rename an object which is not an instance of Element.",this);var n=e.root.document?e.root.document.version:null,r=new _a(to._createBefore(e),e.name,t,n);this.batch.addOperation(r),this.model.applyOperation(r)}},{key:"split",value:function(e,t){this._assertWriterUsedCorrectly();var n,r,i=e.parent;if(!i.parent)throw new It.b("writer-split-element-no-parent: Element with no parent can not be split.",this);if(t||(t=i.parent),!e.parent.getAncestors({includeSelf:!0}).includes(t))throw new It.b("writer-split-invalid-limit-element: Limit element is not a position ancestor.",this);do{var o=i.root.document?i.root.document.version:null,a=i.maxOffset-e.offset,s=new Ca(e,a,null,o);this.batch.addOperation(s),this.model.applyOperation(s),n||r||(n=i,r=e.parent.nextSibling),i=(e=this.createPositionAfter(e.parent)).parent}while(i!==t);return{position:e,range:new no(to._createAt(n,"end"),to._createAt(r,0))}}},{key:"wrap",value:function(e,t){if(this._assertWriterUsedCorrectly(),!e.isFlat)throw new It.b("writer-wrap-range-not-flat: Range to wrap is not flat.",this);var n=t instanceof Xi?t:new Xi(t);if(n.childCount>0)throw new It.b("writer-wrap-element-not-empty: Element to wrap with is not empty.",this);if(null!==n.parent)throw new It.b("writer-wrap-element-attached: Element to wrap with is already attached to tree model.",this);this.insert(n,e.start);var r=new no(e.start.getShiftedBy(1),e.end.getShiftedBy(1));this.move(r,to._createAt(n,0))}},{key:"unwrap",value:function(e){if(this._assertWriterUsedCorrectly(),null===e.parent)throw new It.b("writer-unwrap-element-no-parent: Trying to unwrap an element which has no parent.",this);this.move(no._createIn(e),this.createPositionAfter(e)),this.remove(e)}},{key:"addMarker",value:function(e,t){if(this._assertWriterUsedCorrectly(),!t||"boolean"!=typeof t.usingOperation)throw new It.b("writer-addMarker-no-usingOperation: The options.usingOperation parameter is required when adding a new marker.",this);var n=t.usingOperation,r=t.range,i=void 0!==t.affectsData&&t.affectsData;if(this.model.markers.has(e))throw new It.b("writer-addMarker-marker-exists: Marker with provided name already exists.",this);if(!r)throw new It.b("writer-addMarker-no-range: Range parameter is required when adding a new marker.",this);return n?(Ma(this,e,null,r,i),this.model.markers.get(e)):this.model.markers._set(e,r,n,i)}},{key:"updateMarker",value:function(e,t){this._assertWriterUsedCorrectly();var n="string"==typeof e?e:e.name,r=this.model.markers.get(n);if(!r)throw new It.b("writer-updateMarker-marker-not-exists: Marker with provided name does not exists.",this);if(t){var i="boolean"==typeof t.usingOperation,o="boolean"==typeof t.affectsData,a=o?t.affectsData:r.affectsData;if(!i&&!t.range&&!o)throw new It.b("writer-updateMarker-wrong-options: One of the options is required - provide range, usingOperations or affectsData.",this);var s=r.getRange(),l=t.range?t.range:s;i&&t.usingOperation!==r.managedUsingOperations?t.usingOperation?Ma(this,n,null,l,a):(Ma(this,n,s,null,a),this.model.markers._set(n,l,void 0,a)):r.managedUsingOperations?Ma(this,n,s,l,a):this.model.markers._set(n,l,void 0,a)}else this.model.markers._refresh(r)}},{key:"removeMarker",value:function(e){this._assertWriterUsedCorrectly();var t="string"==typeof e?e:e.name;if(!this.model.markers.has(t))throw new It.b("writer-removeMarker-no-marker: Trying to remove marker which does not exist.",this);var n=this.model.markers.get(t);n.managedUsingOperations?Ma(this,t,n.getRange(),null,n.affectsData):this.model.markers._remove(t)}},{key:"setSelection",value:function(e,t,n){this._assertWriterUsedCorrectly(),this.model.document.selection._setTo(e,t,n)}},{key:"setSelectionFocus",value:function(e,t){this._assertWriterUsedCorrectly(),this.model.document.selection._setFocus(e,t)}},{key:"setSelectionAttribute",value:function(e,t){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._setSelectionAttribute(e,t);else{var n=!0,r=!1,i=void 0;try{for(var o,a=$i(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];this._setSelectionAttribute(u,f)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}},{key:"removeSelectionAttribute",value:function(e){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._removeSelectionAttribute(e);else{var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._removeSelectionAttribute(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}}},{key:"overrideSelectionGravity",value:function(){return this.model.document.selection._overrideGravity()}},{key:"restoreSelectionGravity",value:function(e){this.model.document.selection._restoreGravity(e)}},{key:"_setSelectionAttribute",value:function(e,t){var n=this.model.document.selection;if(n.isCollapsed&&n.anchor.parent.isEmpty){var r=yo._getStoreAttributeKey(e);this.setAttribute(r,t,n.anchor.parent)}n._setAttribute(e,t)}},{key:"_removeSelectionAttribute",value:function(e){var t=this.model.document.selection;if(t.isCollapsed&&t.anchor.parent.isEmpty){var n=yo._getStoreAttributeKey(e);this.removeAttribute(n,t.anchor.parent)}t._removeAttribute(e)}},{key:"_assertWriterUsedCorrectly",value:function(){if(this.model._currentWriter!==this)throw new It.b("writer-incorrect-use: Trying to use a writer outside the change() block.",this)}},{key:"_addOperationForAffectedMarkers",value:function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=this.model.markers[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.managedUsingOperations){var l=s.getRange(),u=!1;if("move"==e)u=t.containsPosition(l.start)||t.start.isEqual(l.start)||t.containsPosition(l.end)||t.end.isEqual(l.end);else{var c=t.nodeBefore,f=t.nodeAfter,d=l.start.parent==c&&l.start.isAtEnd,h=l.end.parent==f&&0==l.end.offset,p=l.end.nodeAfter==f,v=l.start.nodeAfter==f;u=d||h||p||v}u&&this.updateMarker(s.name,{range:l})}}}catch(m){r=!0,i=m}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}]),e}();function Aa(e,t,n,r){var i,o,a,s=e.model,l=s.document,u=r.start,c=!0,f=!1,d=void 0;try{for(var h,p=r.getWalker({shallow:!0})[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;a=v.item.getAttribute(t),i&&o!=a&&(o!=n&&m(),u=i),i=v.nextPosition,o=a}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}function m(){var r=new no(u,i),a=r.root.document?l.version:null,c=new ga(r,t,o,n,a);e.batch.addOperation(c),s.applyOperation(c)}i instanceof to&&i!=u&&o!=n&&m()}function Pa(e,t,n,r){var i,o,a=e.model,s=a.document,l=r.getAttribute(t);if(l!=n){if(r.root===r){var u=r.document?s.version:null;o=new xa(r,t,l,n,u)}else{var c=(i=new no(to._createBefore(r),e.createPositionAfter(r))).root.document?s.version:null;o=new ga(i,t,l,n,c)}e.batch.addOperation(o),a.applyOperation(o)}}function Ma(e,t,n,r,i){var o=e.model,a=o.document,s=new wa(t,n,r,o.markers,i,a.version);e.batch.addOperation(s),o.applyOperation(s)}function Oa(e,t,n,r){var i;if(e.root.document){var o=r.document,a=new to(o.graveyard,[0]);i=new ba(e,t,a,o.version)}else i=new ya(e,t);n.addOperation(i),r.applyOperation(i)}function Na(e,t){return e===t||e instanceof Sa&&t instanceof Sa}var Ia=function(){function e(t){f(this,e),this._markerCollection=t,this._changesInElement=new Map,this._elementSnapshots=new Map,this._changedMarkers=new Map,this._changeCount=0,this._cachedChanges=null,this._cachedChangesWithGraveyard=null}return d(e,[{key:"refreshItem",value:function(e){if(!this._isInInsertedElement(e.parent)){this._markRemove(e.parent,e.startOffset,e.offsetSize),this._markInsert(e.parent,e.startOffset,e.offsetSize);var t=no._createOn(e),n=!0,r=!1,i=void 0;try{for(var o,a=this._markerCollection.getMarkersIntersectingRange(t)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=s.getRange();this.bufferMarkerChange(s.name,l,l,s.affectsData)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._cachedChanges=null}}},{key:"bufferOperation",value:function(e){switch(e.type){case"insert":if(this._isInInsertedElement(e.position.parent))return;this._markInsert(e.position.parent,e.position.offset,e.nodes.maxOffset);break;case"addAttribute":case"removeAttribute":case"changeAttribute":var t=!0,n=!1,r=void 0;try{for(var i,o=e.range.getItems({shallow:!0})[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._isInInsertedElement(a.parent)||this._markAttribute(a)}}catch(w){n=!0,r=w}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}break;case"remove":case"move":case"reinsert":if(e.sourcePosition.isEqual(e.targetPosition)||e.sourcePosition.getShiftedBy(e.howMany).isEqual(e.targetPosition))return;var s=this._isInInsertedElement(e.sourcePosition.parent),l=this._isInInsertedElement(e.targetPosition.parent);s||this._markRemove(e.sourcePosition.parent,e.sourcePosition.offset,e.howMany),l||this._markInsert(e.targetPosition.parent,e.getMovedRangeStart().offset,e.howMany);break;case"rename":if(this._isInInsertedElement(e.position.parent))return;this._markRemove(e.position.parent,e.position.offset,1),this._markInsert(e.position.parent,e.position.offset,1);var u=no._createFromPositionAndShift(e.position,1),c=!0,f=!1,d=void 0;try{for(var h,p=this._markerCollection.getMarkersIntersectingRange(u)[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value,m=v.getRange();this.bufferMarkerChange(v.name,m,m,v.affectsData)}}catch(w){f=!0,d=w}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}break;case"split":var g=e.splitPosition.parent;this._isInInsertedElement(g)||this._markRemove(g,e.splitPosition.offset,e.howMany),this._isInInsertedElement(e.insertionPosition.parent)||this._markInsert(e.insertionPosition.parent,e.insertionPosition.offset,1),e.graveyardPosition&&this._markRemove(e.graveyardPosition.parent,e.graveyardPosition.offset,1);break;case"merge":var y=e.sourcePosition.parent;this._isInInsertedElement(y.parent)||this._markRemove(y.parent,y.startOffset,1);var b=e.graveyardPosition.parent;this._markInsert(b,e.graveyardPosition.offset,1);var k=e.targetPosition.parent;this._isInInsertedElement(k)||this._markInsert(k,e.targetPosition.offset,y.maxOffset)}this._cachedChanges=null}},{key:"bufferMarkerChange",value:function(e,t,n,r){var i=this._changedMarkers.get(e);i?(i.newRange=n,i.affectsData=r,null==i.oldRange&&null==i.newRange&&this._changedMarkers.delete(e)):this._changedMarkers.set(e,{oldRange:t,newRange:n,affectsData:r})}},{key:"getMarkersToRemove",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._changedMarkers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=c(a,2),l=s[0],u=s[1];null!=u.oldRange&&e.push({name:l,range:u.oldRange})}}catch(f){n=!0,r=f}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"getMarkersToAdd",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._changedMarkers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=c(a,2),l=s[0],u=s[1];null!=u.newRange&&e.push({name:l,range:u.newRange})}}catch(f){n=!0,r=f}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"getChangedMarkers",value:function(){return Array.from(this._changedMarkers).map((function(e){return{name:e[0],data:{oldRange:e[1].oldRange,newRange:e[1].newRange}}}))}},{key:"hasDataChanges",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._changedMarkers[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(c(o,2)[1].affectsData)return!0}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return this._changesInElement.size>0}},{key:"getChanges",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeChangesInGraveyard:!1};if(this._cachedChanges)return e.includeChangesInGraveyard?this._cachedChangesWithGraveyard.slice():this._cachedChanges.slice();var t=[],n=!0,r=!1,i=void 0;try{for(var o,a=this._changesInElement.keys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=this._changesInElement.get(s).sort((function(e,t){return e.offset===t.offset?e.type!=t.type?"remove"==e.type?-1:1:0:e.offset<t.offset?-1:1})),c=this._elementSnapshots.get(s),f=Da(s.getChildren()),d=Ra(c.length,l),h=0,p=0,v=!0,m=!1,g=void 0;try{for(var y,b=d[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;if("i"===k)t.push(this._getInsertDiff(s,h,f[h].name)),h++;else if("r"===k)t.push(this._getRemoveDiff(s,h,c[p].name)),p++;else if("a"===k){var w=f[h].attributes,_=c[p].attributes,x=void 0;if("$text"==f[h].name)x=new no(to._createAt(s,h),to._createAt(s,h+1));else{var T=s.offsetToIndex(h);x=new no(to._createAt(s,h),to._createAt(s.getChild(T),0))}t.push.apply(t,u(this._getAttributesDiff(x,_,w))),h++,p++}else h++,p++}}catch(D){m=!0,g=D}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}catch(D){r=!0,i=D}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}t.sort((function(e,t){return e.position.root!=t.position.root?e.position.root.rootName<t.position.root.rootName?-1:1:e.position.isEqual(t.position)?e.changeCount-t.changeCount:e.position.isBefore(t.position)?-1:1}));for(var C=1;C<t.length;C++){var S=t[C-1],E=t[C],A="remove"==S.type&&"remove"==E.type&&"$text"==S.name&&"$text"==E.name&&S.position.isEqual(E.position),P="insert"==S.type&&"insert"==E.type&&"$text"==S.name&&"$text"==E.name&&S.position.parent==E.position.parent&&S.position.offset+S.length==E.position.offset,M="attribute"==S.type&&"attribute"==E.type&&S.position.parent==E.position.parent&&S.range.isFlat&&E.range.isFlat&&S.position.offset+S.length==E.position.offset&&S.attributeKey==E.attributeKey&&S.attributeOldValue==E.attributeOldValue&&S.attributeNewValue==E.attributeNewValue;(A||P||M)&&(t[C-1].length++,M&&(t[C-1].range.end=t[C-1].range.end.getShiftedBy(1)),t.splice(C,1),C--)}for(var O=0,N=t;O<N.length;O++){var I=N[O];delete I.changeCount,"attribute"==I.type&&(delete I.position,delete I.length)}return this._changeCount=0,this._cachedChangesWithGraveyard=t.slice(),this._cachedChanges=t.slice().filter(ja),e.includeChangesInGraveyard?this._cachedChangesWithGraveyard:this._cachedChanges}},{key:"reset",value:function(){this._changesInElement.clear(),this._elementSnapshots.clear(),this._changedMarkers.clear(),this._cachedChanges=null}},{key:"_markInsert",value:function(e,t,n){var r={type:"insert",offset:t,howMany:n,count:this._changeCount++};this._markChange(e,r)}},{key:"_markRemove",value:function(e,t,n){var r={type:"remove",offset:t,howMany:n,count:this._changeCount++};this._markChange(e,r),this._removeAllNestedChanges(e,t,n)}},{key:"_markAttribute",value:function(e){var t={type:"attribute",offset:e.startOffset,howMany:e.offsetSize,count:this._changeCount++};this._markChange(e.parent,t)}},{key:"_markChange",value:function(e,t){this._makeSnapshot(e);var n=this._getChangesForElement(e);this._handleChange(t,n),n.push(t);for(var r=0;r<n.length;r++)n[r].howMany<1&&(n.splice(r,1),r--)}},{key:"_getChangesForElement",value:function(e){var t;return this._changesInElement.has(e)?t=this._changesInElement.get(e):(t=[],this._changesInElement.set(e,t)),t}},{key:"_makeSnapshot",value:function(e){this._elementSnapshots.has(e)||this._elementSnapshots.set(e,Da(e.getChildren()))}},{key:"_handleChange",value:function(e,t){e.nodesToHandle=e.howMany;var n=!0,r=!1,i=void 0;try{for(var o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=e.offset+e.howMany,u=s.offset+s.howMany;if("insert"==e.type&&("insert"==s.type&&(e.offset<=s.offset?s.offset+=e.howMany:e.offset<u&&(s.howMany+=e.nodesToHandle,e.nodesToHandle=0)),"remove"==s.type&&e.offset<s.offset&&(s.offset+=e.howMany),"attribute"==s.type))if(e.offset<=s.offset)s.offset+=e.howMany;else if(e.offset<u){var c=s.howMany;s.howMany=e.offset-s.offset,t.unshift({type:"attribute",offset:l,howMany:c-s.howMany,count:this._changeCount++})}if("remove"==e.type){if("insert"==s.type)if(l<=s.offset)s.offset-=e.howMany;else if(l<=u)if(e.offset<s.offset){var f=l-s.offset;s.offset=e.offset,s.howMany-=f,e.nodesToHandle-=f}else s.howMany-=e.nodesToHandle,e.nodesToHandle=0;else if(e.offset<=s.offset)e.nodesToHandle-=s.howMany,s.howMany=0;else if(e.offset<u){var d=u-e.offset;s.howMany-=d,e.nodesToHandle-=d}if("remove"==s.type&&(l<=s.offset?s.offset-=e.howMany:e.offset<s.offset&&(e.nodesToHandle+=s.howMany,s.howMany=0)),"attribute"==s.type)if(l<=s.offset)s.offset-=e.howMany;else if(e.offset<s.offset){var h=l-s.offset;s.offset=e.offset,s.howMany-=h}else if(e.offset<u)if(l<=u){var p=s.howMany;s.howMany=e.offset-s.offset;var v=p-s.howMany-e.nodesToHandle;t.unshift({type:"attribute",offset:e.offset,howMany:v,count:this._changeCount++})}else s.howMany-=u-e.offset}if("attribute"==e.type){if("insert"==s.type)if(e.offset<s.offset&&l>s.offset){if(l>u){var m={type:"attribute",offset:u,howMany:l-u,count:this._changeCount++};this._handleChange(m,t),t.push(m)}e.nodesToHandle=s.offset-e.offset,e.howMany=e.nodesToHandle}else e.offset>=s.offset&&e.offset<u&&(l>u?(e.nodesToHandle=l-u,e.offset=u):e.nodesToHandle=0);if("remove"==s.type&&e.offset<s.offset&&l>s.offset){var g={type:"attribute",offset:s.offset,howMany:l-s.offset,count:this._changeCount++};this._handleChange(g,t),t.push(g),e.nodesToHandle=s.offset-e.offset,e.howMany=e.nodesToHandle}"attribute"==s.type&&(e.offset>=s.offset&&l<=u?(e.nodesToHandle=0,e.howMany=0,e.offset=0):e.offset<=s.offset&&l>=u&&(s.howMany=0))}}}catch(y){r=!0,i=y}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}e.howMany=e.nodesToHandle,delete e.nodesToHandle}},{key:"_getInsertDiff",value:function(e,t,n){return{type:"insert",position:to._createAt(e,t),name:n,length:1,changeCount:this._changeCount++}}},{key:"_getRemoveDiff",value:function(e,t,n){return{type:"remove",position:to._createAt(e,t),name:n,length:1,changeCount:this._changeCount++}}},{key:"_getAttributesDiff",value:function(e,t,n){var r=[];n=new Map(n);var i=!0,o=!1,a=void 0;try{for(var s,l=t[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,f=c(u,2),d=f[0],h=f[1],p=n.has(d)?n.get(d):null;p!==h&&r.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:d,attributeOldValue:h,attributeNewValue:p,changeCount:this._changeCount++}),n.delete(d)}}catch(T){o=!0,a=T}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var v=!0,m=!1,g=void 0;try{for(var y,b=n[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value,w=c(k,2),_=w[0],x=w[1];r.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:_,attributeOldValue:null,attributeNewValue:x,changeCount:this._changeCount++})}}catch(T){m=!0,g=T}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}return r}},{key:"_isInInsertedElement",value:function(e){var t=e.parent;if(!t)return!1;var n=this._changesInElement.get(t),r=e.startOffset;if(n){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if("insert"==u.type&&r>=u.offset&&r<u.offset+u.howMany)return!0}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}return this._isInInsertedElement(t)}},{key:"_removeAllNestedChanges",value:function(e,t,n){var r=new no(to._createAt(e,t),to._createAt(e,t+n)),i=!0,o=!1,a=void 0;try{for(var s,l=r.getItems({shallow:!0})[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;u.is("element")&&(this._elementSnapshots.delete(u),this._changesInElement.delete(u),this._removeAllNestedChanges(u,0,u.maxOffset))}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}},{key:"isEmpty",get:function(){return 0==this._changesInElement.size&&0==this._changedMarkers.size}}]),e}();function Da(e){var t=[],n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.is("text"))for(var l=0;l<s.data.length;l++)t.push({name:"$text",attributes:new Map(s.getAttributes())});else t.push({name:s.name,attributes:new Map(s.getAttributes())})}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}function Ra(e,t){var n=[],r=0,i=0,o=!0,a=!1,s=void 0;try{for(var l,c=t[Symbol.iterator]();!(o=(l=c.next()).done);o=!0){var f=l.value;if(f.offset>r){for(var d=0;d<f.offset-r;d++)n.push("e");i+=f.offset-r}if("insert"==f.type){for(var h=0;h<f.howMany;h++)n.push("i");r=f.offset+f.howMany}else if("remove"==f.type){for(var p=0;p<f.howMany;p++)n.push("r");r=f.offset,i+=f.howMany}else n.push.apply(n,u("a".repeat(f.howMany).split(""))),r=f.offset+f.howMany,i+=f.howMany}}catch(m){a=!0,s=m}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}if(i<e)for(var v=0;v<e-i-r;v++)n.push("e");return n}function ja(e){var t=e.position&&"$graveyard"==e.position.root.rootName,n=e.range&&"$graveyard"==e.range.root.rootName;return!t&&!n}var La=function(){function e(){f(this,e),this._operations=[],this._undoPairs=new Map,this._undoneOperations=new Set}return d(e,[{key:"addOperation",value:function(e){this._operations.includes(e)||this._operations.push(e)}},{key:"getOperations",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0,t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:Number.POSITIVE_INFINITY;return e<0?[]:this._operations.slice(e,t)}},{key:"getOperation",value:function(e){return this._operations[e]}},{key:"setOperationAsUndone",value:function(e,t){this._undoPairs.set(t,e),this._undoneOperations.add(e)}},{key:"isUndoingOperation",value:function(e){return this._undoPairs.has(e)}},{key:"isUndoneOperation",value:function(e){return this._undoneOperations.has(e)}},{key:"getUndoneOperation",value:function(e){return this._undoPairs.get(e)}}]),e}();function Fa(e,t){return!!(n=e.charAt(t-1))&&1==n.length&&/[\ud800-\udbff]/.test(n)&&function(e){return!!e&&1==e.length&&/[\udc00-\udfff]/.test(e)}(e.charAt(t));var n}function za(e,t){return!!(n=e.charAt(t))&&1==n.length&&/[\u0300-\u036f\u1ab0-\u1aff\u1dc0-\u1dff\u20d0-\u20ff\ufe20-\ufe2f]/.test(n);var n}var Va="$graveyard",Ba=function(){function e(t){var n=this;f(this,e),this.model=t,this.version=0,this.history=new La(this),this.selection=new yo(this),this.roots=new Fn({idProperty:"rootName"}),this.differ=new Ia(t.markers),this._postFixers=new Set,this._hasSelectionChangedFromTheLastChangeBlock=!1,this.createRoot("$root",Va),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];if(r.isDocumentOperation&&r.baseVersion!==n.version)throw new It.b("model-document-applyOperation-wrong-version: Only operations with matching versions can be applied.",n,{operation:r})}),{priority:"highest"}),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];r.isDocumentOperation&&n.differ.bufferOperation(r)}),{priority:"high"}),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];r.isDocumentOperation&&(n.version++,n.history.addOperation(r))}),{priority:"low"}),this.listenTo(this.selection,"change",(function(){n._hasSelectionChangedFromTheLastChangeBlock=!0})),this.listenTo(t.markers,"update",(function(e,t,r,i){n.differ.bufferMarkerChange(t.name,r,i,t.affectsData),null===r&&t.on("change",(function(e,r){n.differ.bufferMarkerChange(t.name,r,t.getRange(),t.affectsData)}))}))}return d(e,[{key:"createRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"$root",t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"main";if(this.roots.get(t))throw new It.b("model-document-createRoot-name-exists: Root with specified name already exists.",this,{name:t});var n=new Sa(this,e,t);return this.roots.add(n),n}},{key:"destroy",value:function(){this.selection.destroy(),this.stopListening()}},{key:"getRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.roots.get(e)}},{key:"getRootNames",value:function(){return Array.from(this.roots,(function(e){return e.rootName})).filter((function(e){return e!=Va}))}},{key:"registerPostFixer",value:function(e){this._postFixers.add(e)}},{key:"toJSON",value:function(){var e=Gt(this);return e.selection="[engine.model.DocumentSelection]",e.model="[engine.model.Model]",e}},{key:"_handleChangeBlock",value:function(e){this._hasDocumentChangedFromTheLastChangeBlock()&&(this._callPostFixers(e),this.selection.refresh(),this.differ.hasDataChanges()?this.fire("change:data",e.batch):this.fire("change",e.batch),this.selection.refresh(),this.differ.reset()),this._hasSelectionChangedFromTheLastChangeBlock=!1}},{key:"_hasDocumentChangedFromTheLastChangeBlock",value:function(){return!this.differ.isEmpty||this._hasSelectionChangedFromTheLastChangeBlock}},{key:"_getDefaultRoot",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.roots[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(o!==this.graveyard)return o}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return this.graveyard}},{key:"_getDefaultRange",value:function(){var e=this._getDefaultRoot(),t=this.model,n=t.schema,r=t.createPositionFromPath(e,[0]);return n.getNearestSelectionRange(r)||t.createRange(r)}},{key:"_validateSelectionRange",value:function(e){return Ua(e.start)&&Ua(e.end)}},{key:"_callPostFixers",value:function(e){var t=!1;do{var n=!0,r=!1,i=void 0;try{for(var o,a=this._postFixers[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(this.selection.refresh(),t=s(e))break}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}while(t)}},{key:"graveyard",get:function(){return this.getRoot(Va)}}]),e}();function Ua(e){var t=e.textNode;if(t){var n=t.data,r=e.offset-t.startOffset;return!Fa(n,r)&&!za(n,r)}return!0}Yt(Ba,zt);var Ha=function(){function e(){f(this,e),this._markers=new Map}return d(e,[{key:Symbol.iterator,value:function(){return this._markers.values()}},{key:"has",value:function(e){return this._markers.has(e)}},{key:"get",value:function(e){return this._markers.get(e)||null}},{key:"_set",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]&&arguments[2],r=arguments.length>3&&void 0!==arguments[3]&&arguments[3],i=e instanceof qa?e.name:e,o=this._markers.get(i);if(o){var a=o.getRange(),s=!1;return a.isEqual(t)||(o._attachLiveRange(po.fromRange(t)),s=!0),n!=o.managedUsingOperations&&(o._managedUsingOperations=n,s=!0),"boolean"==typeof r&&r!=o.affectsData&&(o._affectsData=r,s=!0),s&&this.fire("update:"+i,o,a,t),o}var l=po.fromRange(t),u=new qa(i,l,n,r);return this._markers.set(i,u),this.fire("update:"+i,u,null,t),u}},{key:"_remove",value:function(e){var t=e instanceof qa?e.name:e,n=this._markers.get(t);return!!n&&(this._markers.delete(t),this.fire("update:"+t,n,n.getRange(),null),this._destroyMarker(n),!0)}},{key:"_refresh",value:function(e){var t=e instanceof qa?e.name:e,n=this._markers.get(t);if(!n)throw new It.b("markercollection-refresh-marker-not-exists: Marker with provided name does not exists.",this);var r=n.getRange();this.fire("update:"+t,n,r,r,n.managedUsingOperations,n.affectsData)}},{key:"getMarkersAtPosition",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=l.getRange().containsPosition(t),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"getMarkersIntersectingRange",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=null!==l.getRange().getIntersection(t),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"destroy",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._markers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;this._destroyMarker(o)}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this._markers=null,this.stopListening()}},{key:"getMarkersGroup",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this._markers.values()[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=l.name.startsWith(t+":"),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"_destroyMarker",value:function(e){e.stopListening(),e._detachLiveRange()}}]),e}();Yt(Ha,zt);var qa=function(){function e(t,n,r,i){f(this,e),this.name=t,this._liveRange=this._attachLiveRange(n),this._managedUsingOperations=r,this._affectsData=i}return d(e,[{key:"getStart",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.start.clone()}},{key:"getEnd",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.end.clone()}},{key:"getRange",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.toRange()}},{key:"is",value:function(e){return"marker"==e||"model:marker"==e}},{key:"_attachLiveRange",value:function(e){return this._liveRange&&this._detachLiveRange(),e.delegate("change:range").to(this),e.delegate("change:content").to(this),this._liveRange=e,e}},{key:"_detachLiveRange",value:function(){this._liveRange.stopDelegating("change:range",this),this._liveRange.stopDelegating("change:content",this),this._liveRange.detach(),this._liveRange=null}},{key:"managedUsingOperations",get:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._managedUsingOperations}},{key:"affectsData",get:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._affectsData}}]),e}();Yt(qa,zt);var Wa=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(f(this,t),!(r=h(this,p(t).call(this,e,n,i))).root.is("rootElement"))throw new It.b("model-liveposition-root-not-rootelement: LivePosition's root has to be an instance of RootElement.",e);return Ya.call(o(r)),h(r)}return v(t,e),d(t,[{key:"detach",value:function(){this.stopListening()}},{key:"is",value:function(e){return"livePosition"==e||"model:livePosition"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toPosition",value:function(){return new to(this.root,this.path.slice(),this.stickiness)}}],[{key:"fromPosition",value:function(e,t){return new this(e.root,e.path.slice(),t||e.stickiness)}}]),t}(to);function Ya(){var e=this;this.listenTo(this.root.document.model,"applyOperation",(function(t,n){var r=n[0];r.isDocumentOperation&&$a.call(e,r)}),{priority:"low"})}function $a(e){var t=this.getTransformedByOperation(e);if(!this.isEqual(t)){var n=this.toPosition();this.path=t.path,this.root=t.root,this.fire("change",n)}}Yt(Wa,zt);var Ga=function(){function e(t,n,r){f(this,e),this.model=t,this.writer=n,this.position=r,this.canMergeWith=new Set([this.position.parent]),this.schema=t.schema,this._filterAttributesOf=[],this._affectedStart=null,this._affectedEnd=null}return d(e,[{key:"handleNodes",value:function(e,t){e=Array.from(e);for(var n=0;n<e.length;n++){var r=e[n];this._handleNode(r,{isFirst:0===n&&t.isFirst,isLast:n===e.length-1&&t.isLast})}this.schema.removeDisallowedAttributes(this._filterAttributesOf,this.writer),this._filterAttributesOf=[]}},{key:"getSelectionRange",value:function(){return this.nodeToSelect?no._createOn(this.nodeToSelect):this.model.schema.getNearestSelectionRange(this.position)}},{key:"getAffectedRange",value:function(){return this._affectedStart?new no(this._affectedStart,this._affectedEnd):null}},{key:"destroy",value:function(){this._affectedStart&&this._affectedStart.detach(),this._affectedEnd&&this._affectedEnd.detach()}},{key:"_handleNode",value:function(e,t){this.schema.isObject(e)?this._handleObject(e,t):this._checkAndSplitToAllowedPosition(e,t)?(this._insert(e),this._mergeSiblingsOf(e,t)):this._handleDisallowedNode(e,t)}},{key:"_handleObject",value:function(e,t){this._checkAndSplitToAllowedPosition(e)?this._insert(e):this._tryAutoparagraphing(e,t)}},{key:"_handleDisallowedNode",value:function(e,t){e.is("element")?this.handleNodes(e.getChildren(),t):this._tryAutoparagraphing(e,t)}},{key:"_insert",value:function(e){if(!this.schema.checkChild(this.position,e))throw new It.b("insertcontent-wrong-position: Given node cannot be inserted on the given position.",this,{node:e,position:this.position});var t=Wa.fromPosition(this.position,"toNext");this._setAffectedBoundaries(this.position),this.writer.insert(e,this.position),this.position=t.toPosition(),t.detach(),this.schema.isObject(e)&&!this.schema.checkChild(this.position,"$text")?this.nodeToSelect=e:this.nodeToSelect=null,this._filterAttributesOf.push(e)}},{key:"_setAffectedBoundaries",value:function(e){this._affectedStart||(this._affectedStart=Wa.fromPosition(e,"toPrevious")),this._affectedEnd&&!this._affectedEnd.isBefore(e)||(this._affectedEnd&&this._affectedEnd.detach(),this._affectedEnd=Wa.fromPosition(e,"toNext"))}},{key:"_mergeSiblingsOf",value:function(e,t){if(e instanceof Xi){var n=this._canMergeLeft(e,t),r=this._canMergeRight(e,t),i=Wa._createBefore(e);i.stickiness="toNext";var o=Wa._createAfter(e);if(o.stickiness="toNext",n){var a=Wa.fromPosition(this.position);a.stickiness="toNext",this._affectedStart.isEqual(i)&&(this._affectedStart.detach(),this._affectedStart=Wa._createAt(i.nodeBefore,"end","toPrevious")),this.writer.merge(i),i.isEqual(this._affectedEnd)&&t.isLast&&(this._affectedEnd.detach(),this._affectedEnd=Wa._createAt(i.nodeBefore,"end","toNext")),this.position=a.toPosition(),a.detach()}if(r){if(!this.position.isEqual(o))throw new It.b("insertcontent-invalid-insertion-position",this);this.position=to._createAt(o.nodeBefore,"end");var s=Wa.fromPosition(this.position,"toPrevious");this._affectedEnd.isEqual(o)&&(this._affectedEnd.detach(),this._affectedEnd=Wa._createAt(o.nodeBefore,"end","toNext")),this.writer.merge(o),o.getShiftedBy(-1).isEqual(this._affectedStart)&&t.isFirst&&(this._affectedStart.detach(),this._affectedStart=Wa._createAt(o.nodeBefore,0,"toPrevious")),this.position=s.toPosition(),s.detach()}(n||r)&&this._filterAttributesOf.push(this.position.parent),i.detach(),o.detach()}}},{key:"_canMergeLeft",value:function(e,t){var n=e.previousSibling;return t.isFirst&&n instanceof Xi&&this.canMergeWith.has(n)&&this.model.schema.checkMerge(n,e)}},{key:"_canMergeRight",value:function(e,t){var n=e.nextSibling;return t.isLast&&n instanceof Xi&&this.canMergeWith.has(n)&&this.model.schema.checkMerge(e,n)}},{key:"_tryAutoparagraphing",value:function(e,t){var n=this.writer.createElement("paragraph");this._getAllowedIn(n,this.position.parent)&&this.schema.checkChild(n,e)&&(n._appendChild(e),this._handleNode(n,t))}},{key:"_checkAndSplitToAllowedPosition",value:function(e){var t=this._getAllowedIn(e,this.position.parent);if(!t)return!1;for(;t!=this.position.parent;){if(this.schema.isLimit(this.position.parent))return!1;if(this.position.isAtStart){var n=this.position.parent;this.position=this.writer.createPositionBefore(n),n.isEmpty&&n.parent===t&&this.writer.remove(n)}else if(this.position.isAtEnd)this.position=this.writer.createPositionAfter(this.position.parent);else{var r=this.writer.createPositionAfter(this.position.parent);this._setAffectedBoundaries(this.position),this.writer.split(this.position),this.position=r,this.canMergeWith.add(this.position.nodeAfter)}}return!0}},{key:"_getAllowedIn",value:function(e,t){return this.schema.checkChild(t,e)?t:t.parent?this._getAllowedIn(e,t.parent):null}}]),e}();function Qa(e,t,n){var r=e.createElement("paragraph");e.insert(r,t),Ka(e,n,e.createPositionAt(r,0))}function Ka(e,t,n){t instanceof yo?e.setSelection(n):t.setTo(n)}var Ja=' ,.?!:;"-()';function Xa(e,t){if("text"==t.type)return"word"===e.unit?function(e,t){var n=e.position.textNode;if(n)for(var r=e.position.offset-n.startOffset;!es(n.data,r,t)&&!ts(n,r,t);){e.next();var i=t?e.position.nodeAfter:e.position.nodeBefore;if(i&&i.is("text")){var o=i.data.charAt(t?0:i.data.length-1);Ja.includes(o)||(e.next(),n=e.position.textNode)}r=e.position.offset-n.startOffset}return e.position}(e.walker,e.isForward):function(e,t){var n=e.position.textNode;if(n)for(var r=n.data,i=e.position.offset-n.startOffset;Fa(r,i)||"character"==t&&za(r,i);)e.next(),i=e.position.offset-n.startOffset;return e.position}(e.walker,e.unit,e.isForward);if(t.type==(e.isForward?"elementStart":"elementEnd")){if(e.schema.isObject(t.item))return to._createAt(t.item,e.isForward?"after":"before");if(e.schema.checkChild(t.nextPosition,"$text"))return t.nextPosition}else{if(e.schema.isLimit(t.item))return void e.walker.skip((function(){return!0}));if(e.schema.checkChild(t.nextPosition,"$text"))return t.nextPosition}}function Za(e,t){var n=e.root,r=to._createAt(n,t?"end":0);return t?new no(e,r):new no(r,e)}function es(e,t,n){var r=t+(n?0:-1);return Ja.includes(e.charAt(r))}function ts(e,t,n){return t===(n?e.endOffset:0)}function ns(e,t){var n=[];Array.from(e.getItems({direction:"backward"})).map((function(e){return t.createRangeOn(e)})).filter((function(t){return(t.start.isAfter(e.start)||t.start.isEqual(e.start))&&(t.end.isBefore(e.end)||t.end.isEqual(e.end))})).forEach((function(e){n.push(e.start.parent),t.remove(e)})),n.forEach((function(e){for(var n=e;n.parent&&n.isEmpty;){var r=t.createRangeOn(n);n=n.parent,t.remove(r)}}))}function rs(e,t){return e.isCollapsed?function(e,t){var n=e.start,r=t.getNearestSelectionRange(n);if(!r)return null;var i=r.start;return n.isEqual(i)?null:i.nodeAfter&&t.isLimit(i.nodeAfter)?new no(i,to._createAfter(i.nodeAfter)):new no(i)}(e,t):function(e,t){var n=e.start,r=e.end,i=t.checkChild(n,"$text"),o=t.checkChild(r,"$text"),a=t.getLimitElement(n),s=t.getLimitElement(r);if(a===s){if(i&&o)return null;if(function(e,t,n){var r=e.nodeAfter&&!n.isLimit(e.nodeAfter)||n.checkChild(e,"$text"),i=t.nodeBefore&&!n.isLimit(t.nodeBefore)||n.checkChild(t,"$text");return r||i}(n,r,t)){var l=n.nodeAfter&&t.isObject(n.nodeAfter)?null:t.getNearestSelectionRange(n,"forward"),u=r.nodeBefore&&t.isObject(r.nodeBefore)?null:t.getNearestSelectionRange(r,"backward"),c=l?l.start:n,f=u?u.start:r;return new no(c,f)}}var d=a&&!a.is("rootElement"),h=s&&!s.is("rootElement");if(d||h){var p=n.nodeAfter&&r.nodeBefore&&n.nodeAfter.parent===r.nodeBefore.parent,v=d&&(!p||!os(n.nodeAfter,t)),m=h&&(!p||!os(r.nodeBefore,t)),g=n,y=r;return v&&(g=to._createBefore(is(a,t))),m&&(y=to._createAfter(is(s,t))),new no(g,y)}return null}(e,t)}function is(e,t){for(var n=e,r=n;t.isLimit(r)&&r.parent;)n=r,r=r.parent;return n}function os(e,t){return e&&t.isObject(e)}var as=function(){function e(){var t=this;f(this,e),this.markers=new Ha,this.document=new Ba(this),this.schema=new Uo,this._pendingChanges=[],this._currentWriter=null,["insertContent","deleteContent","modifySelection","getSelectedContent","applyOperation"].forEach((function(e){return t.decorate(e)})),this.on("applyOperation",(function(e,t){t[0]._validate()}),{priority:"highest"}),this.schema.register("$root",{isLimit:!0}),this.schema.register("$block",{allowIn:"$root",isBlock:!0}),this.schema.register("$text",{allowIn:"$block",isInline:!0}),this.schema.register("$clipboardHolder",{allowContentOf:"$root",isLimit:!0}),this.schema.extend("$text",{allowIn:"$clipboardHolder"}),this.schema.register("$marker"),this.schema.addChildCheck((function(e,t){if("$marker"===t.name)return!0})),function(e){e.document.registerPostFixer((function(t){return function(e,t){var n=t.document.selection,r=t.schema,i=[],o=!1,a=!0,s=!1,l=void 0;try{for(var u,c=n.getRanges()[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value,d=rs(f,r);d?(i.push(d),o=!0):i.push(f)}}catch(m){s=!0,l=m}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}if(o){var h=i;if(i.length>1){var p=i[0].start,v=i[i.length-1].end;h=[new no(p,v)]}e.setSelection(h,{backward:n.isBackward})}}(t,e)}))}(this)}return d(e,[{key:"change",value:function(e){try{return 0===this._pendingChanges.length?(this._pendingChanges.push({batch:new aa,callback:e}),this._runPendingChanges()[0]):e(this._currentWriter)}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"enqueueChange",value:function(e,t){try{"string"==typeof e?e=new aa(e):"function"==typeof e&&(t=e,e=new aa),this._pendingChanges.push({batch:e,callback:t}),1==this._pendingChanges.length&&this._runPendingChanges()}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"applyOperation",value:function(e){e._execute()}},{key:"insertContent",value:function(e,t,n){return function(e,t,n,r){return e.change((function(i){var o,a=(o=n?n instanceof lo||n instanceof yo?n:i.createSelection(n,r):e.document.selection).getFirstPosition();o.isCollapsed||e.deleteContent(o,{doNotAutoparagraph:!0});var s,l=new Ga(e,i,a);s=t.is("documentFragment")?t.getChildren():[t],l.handleNodes(s,{isFirst:!0,isLast:!0});var u=l.getSelectionRange();u&&(o instanceof yo?i.setSelection(u):o.setTo(u));var c=l.getAffectedRange()||e.createRange(a);return l.destroy(),c}))}(this,e,t,n)}},{key:"deleteContent",value:function(e,t){!function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(!t.isCollapsed){var r=t.getFirstRange();if("$graveyard"!=r.root.rootName){var i=e.schema;e.change((function(e){if(n.doNotResetEntireContent||!function(e,t){var n=e.getLimitElement(t);if(!t.containsEntireContent(n))return!1;var r=t.getFirstRange();return r.start.parent!=r.end.parent&&e.checkChild(n,"paragraph")}(i,t)){var o=r.start,a=Wa.fromPosition(r.end,"toNext");if(r.start.isTouching(r.end)||e.remove(r),n.leaveUnmerged||(function e(t,n,r){var i=n.parent,o=r.parent;if(i!=o&&!t.model.schema.isLimit(i)&&!t.model.schema.isLimit(o)&&function(e,t,n){var r=new no(e,t),i=!0,o=!1,a=void 0;try{for(var s,l=r.getWalker()[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if(n.isLimit(u.item))return!1}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return!0}(n,r,t.model.schema)){for(n=t.createPositionAfter(i),(r=t.createPositionBefore(o)).isEqual(n)||t.insert(o,n),t.merge(n);r.parent.isEmpty;){var a=r.parent;r=t.createPositionBefore(a),t.remove(a)}e(t,n,r)}}(e,o,a),i.removeDisallowedAttributes(o.parent.getChildren(),e)),Ka(e,t,o),function(e,t){var n=e.checkChild(t,"$text"),r=e.checkChild(t,"paragraph");return!n&&r}(i,o)){var s=i.getNearestSelectionRange(o);n.doNotAutoparagraph&&s?Ka(e,t,s):Qa(e,o,t)}a.detach()}else!function(e,t){var n=e.model.schema.getLimitElement(t);e.remove(e.createRangeIn(n)),Qa(e,e.createPositionAt(n,0),t)}(e,t)}))}}}(this,e,t)}},{key:"modifySelection",value:function(e,t){!function(e,t){for(var n,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},i=e.schema,o="backward"!=r.direction,a=r.unit?r.unit:"character",s=t.focus,l=new Zi({boundaries:Za(s,o),singleCharacters:!0,direction:o?"forward":"backward"}),u={walker:l,schema:i,isForward:o,unit:a},c=function(){if(n.done)return{v:void 0};var r=Xa(u,n.value);return r?{v:void(t instanceof yo?e.change((function(e){e.setSelectionFocus(r)})):t.setFocus(r))}:void 0};n=l.next();){var f=c();if("object"===typeof f)return f.v}}(this,e,t)}},{key:"getSelectedContent",value:function(e){return function(e,t){return e.change((function(e){var n=e.createDocumentFragment(),r=t.getFirstRange();if(!r||r.isCollapsed)return n;var i,o=r.start.root,a=r.start.getCommonPath(r.end),s=o.getNodeByPath(a),l=(i=r.start.parent==r.end.parent?r:e.createRange(e.createPositionAt(s,r.start.path[a.length]),e.createPositionAt(s,r.end.path[a.length]+1))).end.offset-i.start.offset,u=!0,c=!1,f=void 0;try{for(var d,h=i.getItems({shallow:!0})[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;p.is("textProxy")?e.appendText(p.data,p.getAttributes(),n):e.append(p._clone(!0),n)}}catch(g){c=!0,f=g}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}if(i!=r){var v=r._getTransformedByMove(i.start,e.createPositionAt(n,0),l)[0],m=e.createRange(e.createPositionAt(n,0),v.start);ns(e.createRange(v.end,e.createPositionAt(n,"end")),e),ns(m,e)}return n}))}(this,e)}},{key:"hasContent",value:function(e,t){var n=e instanceof Xi?no._createIn(e):e;if(n.isCollapsed)return!1;var r=!0,i=!1,o=void 0;try{for(var a,s=this.markers.getMarkersIntersectingRange(n)[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)if(a.value.affectsData)return!0}catch(m){i=!0,o=m}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var l=(t||{}).ignoreWhitespaces,u=void 0!==l&&l,c=!0,f=!1,d=void 0;try{for(var h,p=n.getItems()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;if(v.is("textProxy")){if(!u)return!0;if(-1!==v.data.search(/\S/))return!0}else if(this.schema.isObject(v))return!0}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}return!1}},{key:"createPositionFromPath",value:function(e,t,n){return new to(e,t,n)}},{key:"createPositionAt",value:function(e,t){return to._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return to._createAfter(e)}},{key:"createPositionBefore",value:function(e){return to._createBefore(e)}},{key:"createRange",value:function(e,t){return new no(e,t)}},{key:"createRangeIn",value:function(e){return no._createIn(e)}},{key:"createRangeOn",value:function(e){return no._createOn(e)}},{key:"createSelection",value:function(e,t,n){return new lo(e,t,n)}},{key:"createBatch",value:function(e){return new aa(e)}},{key:"destroy",value:function(){this.document.destroy(),this.stopListening()}},{key:"_runPendingChanges",value:function(){var e=[];for(this.fire("_beforeChanges");this._pendingChanges.length;){var t=this._pendingChanges[0].batch;this._currentWriter=new Ea(this,t);var n=this._pendingChanges[0].callback(this._currentWriter);e.push(n),this.document._handleChangeBlock(this._currentWriter),this._pendingChanges.shift(),this._currentWriter=null}return this.fire("_afterChanges"),e}}]),e}();Yt(as,wn);var ss=function(){function e(){f(this,e),this._listener=Object.create(Hr)}return d(e,[{key:"listenTo",value:function(e){var t=this;this._listener.listenTo(e,"keydown",(function(e,n){t._listener.fire("_keydown:"+Jn(n),n)}))}},{key:"set",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=Xn(e),i=n.priority;this._listener.listenTo(this._listener,"_keydown:"+r,(function(e,n){t(n,(function(){n.preventDefault(),n.stopPropagation(),e.stop()})),e.return=!0}),{priority:i})}},{key:"press",value:function(e){return!!this._listener.fire("_keydown:"+Jn(e),e)}},{key:"destroy",value:function(){this._listener.stopListening()}}]),e}(),ls=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this))).editor=e,n}return v(t,e),d(t,[{key:"set",value:function(e,n){var r=this,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if("string"==typeof n){var o=n;n=function(e,t){r.editor.execute(o),t()}}l(p(t.prototype),"set",this).call(this,e,n,i)}}]),t}(ss),us=function(){function t(e){var n=this;f(this,t);var r=this.constructor.builtinPlugins;this.config=new Ot(e,this.constructor.defaultConfig),this.config.define("plugins",r),this.plugins=new Ro(this,r),this.commands=new jo;var i=this.config.get("language")||{};this.locale=new Fo({uiLanguage:"string"==typeof i?i:i.ui,contentLanguage:this.config.get("language.content")}),this.t=this.locale.t,this.set("state","initializing"),this.once("ready",(function(){return n.state="ready"}),{priority:"high"}),this.once("destroy",(function(){return n.state="destroyed"}),{priority:"high"}),this.set("isReadOnly",!1),this.model=new as,this.data=new na(this.model),this.editing=new Do(this.model),this.editing.view.document.bind("isReadOnly").to(this),this.conversion=new ra([this.editing.downcastDispatcher,this.data.downcastDispatcher],this.data.upcastDispatcher),this.conversion.addAlias("dataDowncast",this.data.downcastDispatcher),this.conversion.addAlias("editingDowncast",this.editing.downcastDispatcher),this.keystrokes=new ls(this),this.keystrokes.listenTo(this.editing.view.document)}return d(t,[{key:"initPlugins",value:function(){var e=this.config,t=e.get("plugins")||[],n=e.get("removePlugins")||[],r=e.get("extraPlugins")||[];return this.plugins.init(t.concat(r),n)}},{key:"destroy",value:function(){var e=this,t=Promise.resolve();return"initializing"==this.state&&(t=new Promise((function(t){return e.once("ready",t)}))),t.then((function(){e.fire("destroy"),e.stopListening(),e.commands.destroy()})).then((function(){return e.plugins.destroy()})).then((function(){e.model.destroy(),e.data.destroy(),e.editing.destroy(),e.keystrokes.destroy()}))}},{key:"execute",value:function(){try{var t;(t=this.commands).execute.apply(t,arguments)}catch(e){It.b.rethrowUnexpectedError(e,this)}}}]),t}();Yt(us,wn);var cs={updateSourceElement:function(){if(!this.sourceElement)throw new It.b("editor-missing-sourceelement: Cannot update the source element of a detached editor.",this);var e,t;e=this.sourceElement,t=this.data.get(),e instanceof HTMLTextAreaElement&&(e.value=t),e.innerHTML=t}},fs=function(){function e(){f(this,e)}return d(e,[{key:"getHtml",value:function(e){var t=document.implementation.createHTMLDocument("").createElement("div");return t.appendChild(e),t.innerHTML}}]),e}(),ds=function(){function e(){f(this,e),this._domParser=new DOMParser,this._domConverter=new Fr({blockFillerMode:"nbsp"}),this._htmlWriter=new fs}return d(e,[{key:"toData",value:function(e){var t=this._domConverter.viewToDom(e,document);return this._htmlWriter.getHtml(t)}},{key:"toView",value:function(e){var t=this._toDom(e);return this._domConverter.domToView(t)}},{key:"_toDom",value:function(e){for(var t=this._domParser.parseFromString(e,"text/html"),n=t.createDocumentFragment(),r=t.body.childNodes;r.length>0;)n.appendChild(r[0]);return n}}]),e}(),hs=function(){function e(t){f(this,e),this.editor=t,this._components=new Map}return d(e,[{key:"names",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._components.values()[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,a.originalName;case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"add",value:function(e,t){if(this.has(e))throw new It.b("componentfactory-item-exists: The item already exists in the component factory.",this,{name:e});this._components.set(ps(e),{callback:t,originalName:e})}},{key:"create",value:function(e){if(!this.has(e))throw new It.b("componentfactory-item-missing: The required component is not registered in the factory.",this,{name:e});return this._components.get(ps(e)).callback(this.editor.locale)}},{key:"has",value:function(e){return this._components.has(ps(e))}}]),e}();function ps(e){return String(e).toLowerCase()}var vs=function(){function e(){f(this,e),this.set("isFocused",!1),this.set("focusedElement",null),this._elements=new Set,this._nextEventLoopTimeout=null}return d(e,[{key:"add",value:function(e){var t=this;if(this._elements.has(e))throw new It.b("focusTracker-add-element-already-exist",this);this.listenTo(e,"focus",(function(){return t._focus(e)}),{useCapture:!0}),this.listenTo(e,"blur",(function(){return t._blur()}),{useCapture:!0}),this._elements.add(e)}},{key:"remove",value:function(e){e===this.focusedElement&&this._blur(e),this._elements.has(e)&&(this.stopListening(e),this._elements.delete(e))}},{key:"destroy",value:function(){this.stopListening()}},{key:"_focus",value:function(e){clearTimeout(this._nextEventLoopTimeout),this.focusedElement=e,this.isFocused=!0}},{key:"_blur",value:function(){var e=this;clearTimeout(this._nextEventLoopTimeout),this._nextEventLoopTimeout=setTimeout((function(){e.focusedElement=null,e.isFocused=!1}),0)}}]),e}();Yt(vs,Hr),Yt(vs,wn);var ms=function(){function e(t){var n=this;f(this,e),this.editor=t,this.componentFactory=new hs(t),this.focusTracker=new vs,this._editableElementsMap=new Map,this.listenTo(t.editing.view.document,"layoutChanged",(function(){return n.update()}))}return d(e,[{key:"update",value:function(){this.fire("update")}},{key:"destroy",value:function(){this.stopListening(),this.focusTracker.destroy();var e=!0,t=!1,n=void 0;try{for(var r,i=this._editableElementsMap.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.ckeditorInstance=null}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this._editableElementsMap=new Map}},{key:"setEditableElement",value:function(e,t){this._editableElementsMap.set(e,t),t.ckeditorInstance||(t.ckeditorInstance=this.editor)}},{key:"getEditableElement",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this._editableElementsMap.get(e)}},{key:"getEditableElementsNames",value:function(){return this._editableElementsMap.keys()}},{key:"element",get:function(){return null}},{key:"_editableElements",get:function(){return console.warn("editor-ui-deprecated-editable-elements: The EditorUI#_editableElements property has been deprecated and will be removed in the near future.",{editorUI:this}),this._editableElementsMap}}]),e}();Yt(ms,zt),n(13);var gs=new WeakMap;function ys(e){var t=e.view,n=e.element,r=e.text,i=e.isDirectHost,o=void 0===i||i,a=t.document;gs.has(a)||(gs.set(a,new Map),a.registerPostFixer((function(e){return bs(a,e)}))),gs.get(a).set(n,{text:r,isDirectHost:o}),t.change((function(e){return bs(a,e)}))}function bs(e,t){var n=gs.get(e),r=!1,i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,f=c(u,2);ks(t,f[0],f[1])&&(r=!0)}}catch(d){o=!0,a=d}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return r}function ks(e,t,n){var r=n.text,i=n.isDirectHost?t:function(e){if(1===e.childCount){var 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e=this.editor,t=this.view,n=e.editing.view;t.stickyPanel.bind("isActive").to(this.focusTracker,"isFocused"),t.stickyPanel.limiterElement=t.element,this._toolbarConfig.viewportTopOffset&&(t.stickyPanel.viewportTopOffset=this._toolbarConfig.viewportTopOffset),t.toolbar.fillFromConfig(this._toolbarConfig.items,this.componentFactory),function(e){var t=e.origin,n=e.originKeystrokeHandler,r=e.originFocusTracker,i=e.toolbar,o=e.beforeFocus,a=e.afterBlur;r.add(i.element),n.set("Alt+F10",(function(e,t){r.isFocused&&!i.focusTracker.isFocused&&(o&&o(),i.focus(),t())})),i.keystrokes.set("Esc",(function(e,n){i.focusTracker.isFocused&&(t.focus(),a&&a(),n())}))}({origin:n,originFocusTracker:this.focusTracker,originKeystrokeHandler:e.keystrokes,toolbar:t.toolbar})}},{key:"_initPlaceholder",value:function(){var e=this.editor,t=e.editing.view,n=t.document.getRoot(),r=e.sourceElement,i=e.config.get("placeholder")||r&&"textarea"===r.tagName.toLowerCase()&&r.getAttribute("placeholder");i&&ys({view:t,element:n,text:i,isDirectHost:!1})}},{key:"element",get:function(){return this.view.element}}]),t}(ms),xs=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,{idProperty:"viewUid"}))).on("add",(function(e,t,r){t.isRendered||t.render(),t.element&&n._parentElement&&n._parentElement.insertBefore(t.element,n._parentElement.children[r])})),n.on("remove",(function(e,t){t.element&&n._parentElement&&t.element.remove()})),n.locale=e,n._parentElement=null,n}return v(t,e),d(t,[{key:"destroy",value:function(){this.map((function(e){return e.destroy()}))}},{key:"setParent",value:function(e){this._parentElement=e}},{key:"delegate",value:function(){for(var e=this,t=arguments.length,n=new Array(t),r=0;r<t;r++)n[r]=arguments[r];if(!n.length||!n.every((function(e){return"string"==typeof e})))throw new It.b("ui-viewcollection-delegate-wrong-events: All event names must be strings.",this);return{to:function(t){var r=!0,i=!1,o=void 0;try{for(var a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=!0,c=!1,f=void 0;try{for(var d,h=n[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;l.delegate(p).to(t)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}e.on("add",(function(e,r){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r.delegate(u).to(t)}}catch(v){o=!0,a=v}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}})),e.on("remove",(function(e,r){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r.stopDelegating(u,t)}}catch(v){o=!0,a=v}finally{try{i||null==l.return||l.return()}finally{if(o)throw 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r;if(n.attributes&&(t.attributes||(t.attributes={}),Ls(t.attributes,n.attributes)),n.eventListeners&&(t.eventListeners||(t.eventListeners={}),Ls(t.eventListeners,n.eventListeners)),n.text&&(r=t.text).push.apply(r,u(n.text)),n.children&&n.children.length){if(t.children.length!=n.children.length)throw new It.b("ui-template-extend-children-mismatch: The number of children in extended definition does not match.",t);var i=0,o=!0,a=!1,s=void 0;try{for(var l,c=n.children[Symbol.iterator]();!(o=(l=c.next()).done);o=!0){var f=l.value;e(t.children[i++],f)}}catch(d){a=!0,s=d}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}}}(e,Ds(Is(t)))}}]),e}();Yt(Ts,zt);var Cs=function(){function e(t){f(this,e),Object.assign(this,t)}return d(e,[{key:"getValue",value:function(e){var t=this.observable[this.attribute];return this.callback?this.callback(t,e):t}},{key:"activateAttributeListener",value:function(e,t,n){var r=this,i=function(){return Ps(e,t,n)};return 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this._getFocusableItem(-1)}},{key:"current",get:function(){var e=this,t=null;return null===this.focusTracker.focusedElement?null:(this.focusables.find((function(n,r){var i=n.element===e.focusTracker.focusedElement;return i&&(t=r),i})),t)}}]),e}();function Xs(e){return!(!e.focus||"none"==Dr.window.getComputedStyle(e.element).display)}var Zs=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).setTemplate({tag:"span",attributes:{class:["ck","ck-toolbar__separator"]}}),n}return v(t,e),t}(Hs),el=function(){function e(t){f(this,e),this._callback=t,this._elements=new Set,this._previousRects=new Map,this._periodicCheckTimeout=null}return d(e,[{key:"observe",value:function(e){this._elements.add(e),1===this._elements.size&&this._startPeriodicCheck()}},{key:"unobserve",value:function(e){this._elements.delete(e),this._previousRects.delete(e),this._elements.size||this._stopPeriodicCheck()}},{key:"disconnect",value:function(){var e=this;this._elements.forEach((function(t){return e.unobserve(t)}))}},{key:"_startPeriodicCheck",value:function(){var e=this;this.listenTo(Dr.window,"resize",(function(){e._checkElementRectsAndExecuteCallback()})),function t(){e._checkElementRectsAndExecuteCallback(),e._periodicCheckTimeout=setTimeout(t,100)}()}},{key:"_stopPeriodicCheck",value:function(){clearTimeout(this._periodicCheckTimeout),this.stopListening(),this._previousRects.clear()}},{key:"_checkElementRectsAndExecuteCallback",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._elements[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._hasRectChanged(a)&&e.push({target:a,contentRect:this._previousRects.get(a)})}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}e.length&&this._callback(e)}},{key:"_hasRectChanged",value:function(e){if(!e.ownerDocument.body.contains(e))return!1;var t=new Ii(e),n=this._previousRects.get(e),r=!n||!n.isEqual(t);return this._previousRects.set(e,t),r}}]),e}();Yt(el,Hr);var tl=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate;return n.set("isVisible",!1),n.set("position","se"),n.children=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-reset","ck-dropdown__panel",r.to("position",(function(e){return"ck-dropdown__panel_".concat(e)})),r.if("isVisible","ck-dropdown__panel-visible")]},children:n.children,on:{selectstart:r.to((function(e){return e.preventDefault()}))}}),n}return v(t,e),d(t,[{key:"focus",value:function(){this.children.length&&this.children.first.focus()}},{key:"focusLast",value:function(){if(this.children.length){var e=this.children.last;"function"==typeof e.focusLast?e.focusLast():e.focus()}}}]),t}(Hs);function nl(e){var t=e.element,n=e.target,r=e.positions,i=e.limiter,o=e.fitInViewport;H(n)&&(n=n()),H(i)&&(i=i());var a,s,l=function(e){for(;e&&"html"!=e.tagName.toLowerCase();){if("static"!=Dr.window.getComputedStyle(e).position)return e;e=e.parentElement}return null}(t.parentElement),u=new Ii(t),f=new Ii(n);if(i||o){var d=function(e,t,n,r,i){var o,a,s=0,l=0,u=n.getArea();return e.some((function(e){var f,d,h=rl(e,t,n),p=c(h,2),v=p[0],m=p[1];if(r)if(i){var g=r.getIntersection(i);f=g?g.getIntersectionArea(m):0}else f=r.getIntersectionArea(m);function y(){l=d,s=f,o=m,a=v}return i&&(d=i.getIntersectionArea(m)),i&&!r?d>l&&y():!i&&r?f>s&&y():d>l&&f>=s?y():d>=l&&f>s&&y(),f===u})),o?[a,o]:null}(r,f,u,i&&new Ii(i).getVisible(),o&&new Ii(Dr.window))||rl(r[0],f,u),h=c(d,2);s=h[0],a=h[1]}else{var p=rl(r[0],f,u),v=c(p,2);s=v[0],a=v[1]}var m=il(a),g=m.left,y=m.top;if(l){var b=il(new Ii(l)),k=Oi(l);g-=b.left,y-=b.top,g+=l.scrollLeft,y+=l.scrollTop,g-=k.left,y-=k.top}return{left:g,top:y,name:s}}function rl(e,t,n){var r=e(t,n),i=r.left,o=r.top;return[r.name,n.clone().moveTo(i,o)]}function il(e){var 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e=this;l(p(t.prototype),"render",this).call(this),this.listenTo(this.buttonView,"open",(function(){e.isOpen=!e.isOpen})),this.panelView.bind("isVisible").to(this,"isOpen"),this.on("change:isOpen",(function(){e.isOpen&&("auto"===e.panelPosition?e.panelView.position=t._getOptimalPosition({element:e.panelView.element,target:e.buttonView.element,fitInViewport:!0,positions:e._panelPositions}).name:e.panelView.position=e.panelPosition)})),this.keystrokes.listenTo(this.element),this.focusTracker.add(this.element);var n=function(t,n){e.isOpen&&(e.buttonView.focus(),e.isOpen=!1,n())};this.keystrokes.set("arrowdown",(function(t,n){e.buttonView.isEnabled&&!e.isOpen&&(e.isOpen=!0,n())})),this.keystrokes.set("arrowright",(function(t,n){e.isOpen&&n()})),this.keystrokes.set("arrowleft",n),this.keystrokes.set("esc",n)}},{key:"focus",value:function(){this.buttonView.focus()}},{key:"_panelPositions",get:function(){var e=t.defaultPanelPositions,n=e.southEast,r=e.southWest,i=e.northEast,o=e.northWest;return"ltr"===this.locale.uiLanguageDirection?[n,r,i,o]:[r,n,o,i]}}]),t}(Hs);ol.defaultPanelPositions={southEast:function(e){return{top:e.bottom,left:e.left,name:"se"}},southWest:function(e,t){return{top:e.bottom,left:e.left-t.width+e.width,name:"sw"}},northEast:function(e,t){return{top:e.top-t.height,left:e.left,name:"ne"}},northWest:function(e,t){return{top:e.bottom-t.height,left:e.left-t.width+e.width,name:"nw"}}},ol._getOptimalPosition=nl,n(25);var al=function(e){function t(){var e;f(this,t);var n=(e=h(this,p(t).call(this))).bindTemplate;return e.set("content",""),e.set("viewBox","0 0 20 20"),e.set("fillColor",""),e.setTemplate({tag:"svg",ns:"http://www.w3.org/2000/svg",attributes:{class:["ck","ck-icon"],viewBox:n.to("viewBox")}}),e}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this),this._updateXMLContent(),this._colorFillPaths(),this.on("change:content",(function(){e._updateXMLContent(),e._colorFillPaths()})),this.on("change:fillColor",(function(){e._colorFillPaths()}))}},{key:"_updateXMLContent",value:function(){if(this.content){var e=(new DOMParser).parseFromString(this.content.trim(),"image/svg+xml").querySelector("svg"),t=e.getAttribute("viewBox");for(t&&(this.viewBox=t),this.element.innerHTML="";e.childNodes.length>0;)this.element.appendChild(e.childNodes[0])}}},{key:"_colorFillPaths",value:function(){var e=this;this.fillColor&&this.element.querySelectorAll(".ck-icon__fill").forEach((function(t){t.style.fill=e.fillColor}))}}]),t}(Hs);n(27);var sl=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("text",""),n.set("position","s");var r=n.bindTemplate;return n.setTemplate({tag:"span",attributes:{class:["ck","ck-tooltip",r.to("position",(function(e){return"ck-tooltip_"+e})),r.if("text","ck-hidden",(function(e){return!e.trim()}))]},children:[{tag:"span",attributes:{class:["ck","ck-tooltip__text"]},children:[{text:r.to("text")}]}]}),n}return v(t,e),t}(Hs);n(29);var ll=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate,i=Rt();return n.set("class"),n.set("labelStyle"),n.set("icon"),n.set("isEnabled",!0),n.set("isOn",!1),n.set("isVisible",!0),n.set("isToggleable",!1),n.set("keystroke"),n.set("label"),n.set("tabindex",-1),n.set("tooltip"),n.set("tooltipPosition","s"),n.set("type","button"),n.set("withText",!1),n.set("withKeystroke",!1),n.children=n.createCollection(),n.tooltipView=n._createTooltipView(),n.labelView=n._createLabelView(i),n.iconView=new 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v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.icon&&(this.iconView.bind("content").to(this,"icon"),this.children.add(this.iconView)),this.children.add(this.tooltipView),this.children.add(this.labelView),this.withKeystroke&&this.children.add(this.keystrokeView)}},{key:"focus",value:function(){this.element.focus()}},{key:"_createTooltipView",value:function(){var e=new sl;return e.bind("text").to(this,"_tooltipString"),e.bind("position").to(this,"tooltipPosition"),e}},{key:"_createLabelView",value:function(e){var t=new Hs,n=this.bindTemplate;return t.setTemplate({tag:"span",attributes:{class:["ck","ck-button__label"],style:n.to("labelStyle"),id:"ck-editor__aria-label_".concat(e)},children:[{text:this.bindTemplate.to("label")}]}),t}},{key:"_createKeystrokeView",value:function(){var e=new Hs;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__keystroke"]},children:[{text:this.bindTemplate.to("keystroke",(function(e){return Zn(e)}))}]}),e}},{key:"_getTooltipString",value:function(e,t,n){return e?"string"==typeof e?e:(n&&(n=Zn(n)),e instanceof Function?e(t,n):"".concat(t).concat(n?" (".concat(n,")"):"")):""}}]),t}(Hs),ul=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).arrowView=n._createArrowView(),n.extendTemplate({attributes:{"aria-haspopup":!0}}),n.delegate("execute").to(o(n),"open"),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.children.add(this.arrowView)}},{key:"_createArrowView",value:function(){var e=new al;return e.content='<svg viewBox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"><path d="M.941 4.523a.75.75 0 1 1 1.06-1.06l3.006 3.005 3.005-3.005a.75.75 0 1 1 1.06 1.06l-3.549 3.55a.75.75 0 0 1-1.168-.136L.941 4.523z"/></svg>',e.extendTemplate({attributes:{class:"ck-dropdown__arrow"}}),e}}]),t}(ll);n(31);var cl=function(e){function t(){var e;return f(this,t),(e=h(this,p(t).call(this))).items=e.createCollection(),e.focusTracker=new vs,e.keystrokes=new ss,e._focusCycler=new Js({focusables:e.items,focusTracker:e.focusTracker,keystrokeHandler:e.keystrokes,actions:{focusPrevious:"arrowup",focusNext:"arrowdown"}}),e.setTemplate({tag:"ul",attributes:{class:["ck","ck-reset","ck-list"]},children:e.items}),e}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=!0,r=!1,i=void 0;try{for(var o,a=this.items[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this.focusTracker.add(s.element)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.items.on("add",(function(t,n){e.focusTracker.add(n.element)})),this.items.on("remove",(function(t,n){e.focusTracker.remove(n.element)})),this.keystrokes.listenTo(this.element)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"focusLast",value:function(){this._focusCycler.focusLast()}}]),t}(Hs),fl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).children=n.createCollection(),n.setTemplate({tag:"li",attributes:{class:["ck","ck-list__item"]},children:n.children}),n}return v(t,e),d(t,[{key:"focus",value:function(){this.children.first.focus()}}]),t}(Hs),dl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).setTemplate({tag:"li",attributes:{class:["ck","ck-list__separator"]}}),n}return v(t,e),t}(Hs);n(33);var hl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).isToggleable=!0,n.toggleSwitchView=n._createToggleView(),n.extendTemplate({attributes:{class:"ck-switchbutton"}}),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.children.add(this.toggleSwitchView)}},{key:"_createToggleView",value:function(){var e=new Hs;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__toggle"]},children:[{tag:"span",attributes:{class:["ck","ck-button__toggle__inner"]}}]}),e}}]),t}(ll);function pl(e){var t=e.emitter,n=e.activator,r=e.callback,i=e.contextElements;t.listenTo(document,"mousedown",(function(e,t){var o=t.target;if(n()){var a=!0,s=!1,l=void 0;try{for(var u,c=i[Symbol.iterator]();!(a=(u=c.next()).done);a=!0)if(u.value.contains(o))return}catch(f){s=!0,l=f}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}r()}}))}function vl(e){var t=new(arguments.length>1&&void 0!==arguments[1]?arguments[1]:ul)(e),n=new tl(e),r=new ol(e,t,n);return t.bind("isEnabled").to(r),t instanceof ul?t.bind("isOn").to(r,"isOpen"):t.arrowView.bind("isOn").to(r,"isOpen"),function(e){(function(e){e.on("render",(function(){pl({emitter:e,activator:function(){return e.isOpen},callback:function(){e.isOpen=!1},contextElements:[e.element]})}))})(e),function(e){e.on("execute",(function(t){t.source instanceof hl||(e.isOpen=!1)}))}(e),function(e){e.keystrokes.set("arrowdown",(function(t,n){e.isOpen&&(e.panelView.focus(),n())})),e.keystrokes.set("arrowup",(function(t,n){e.isOpen&&(e.panelView.focusLast(),n())}))}(e)}(r),r}function ml(e,t){var n=e.locale,r=e.listView=new cl(n);r.items.bindTo(t).using((function(e){var t=e.type,r=e.model;if("separator"===t)return new dl(n);if("button"===t||"switchbutton"===t){var i,o,a=new fl(n);return(i=o="button"===t?new ll(n):new hl(n)).bind.apply(i,u(Object.keys(r))).to(r),o.delegate("execute").to(a),a.children.add(o),a}})),e.panelView.children.add(r),r.items.delegate("execute").to(e)}n(35),n(37),n(39);var gl=function(e){function t(e,n){var r;f(this,t);var i,a=(r=h(this,p(t).call(this,e))).bindTemplate,s=r.t;return r.options=n||{},r.set("ariaLabel",s("bq")),r.items=r.createCollection(),r.focusTracker=new vs,r.keystrokes=new ss,r.set("class"),r.itemsView=new yl(e),r.children=r.createCollection(),r.children.add(r.itemsView),r.focusables=r.createCollection(),r._focusCycler=new Js({focusables:r.focusables,focusTracker:r.focusTracker,keystrokeHandler:r.keystrokes,actions:{focusPrevious:["arrowleft","arrowup"],focusNext:["arrowright","arrowdown"]}}),r.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar",a.to("class")],role:"toolbar","aria-label":a.to("ariaLabel")},children:r.children,on:{mousedown:(i=o(r),i.bindTemplate.to((function(e){e.target===i.element&&e.preventDefault()})))}}),r._behavior=r.options.shouldGroupWhenFull?new kl(o(r)):new bl(o(r)),r}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=!0,r=!1,i=void 0;try{for(var o,a=this.items[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this.focusTracker.add(s.element)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.items.on("add",(function(t,n){e.focusTracker.add(n.element)})),this.items.on("remove",(function(t,n){e.focusTracker.remove(n.element)})),this.keystrokes.listenTo(this.element),this._behavior.render(this)}},{key:"destroy",value:function(){return this._behavior.destroy(),l(p(t.prototype),"destroy",this).call(this)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"focusLast",value:function(){this._focusCycler.focusLast()}},{key:"fillFromConfig",value:function(e,t){var n=this;e.map((function(e){"|"==e?n.items.add(new Zs):t.has(e)?n.items.add(t.create(e)):console.warn(Object(It.a)("toolbarview-item-unavailable: The requested toolbar item is unavailable."),{name:e})}))}}]),t}(Hs),yl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).children=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar__items"]},children:n.children}),n}return v(t,e),t}(Hs),bl=function(){function e(t){f(this,e);var n=t.bindTemplate;t.set("isVertical",!1),t.itemsView.children.bindTo(t.items).using((function(e){return e})),t.focusables.bindTo(t.items).using((function(e){return e})),t.extendTemplate({attributes:{class:[n.if("isVertical","ck-toolbar_vertical")]}})}return d(e,[{key:"render",value:function(){}},{key:"destroy",value:function(){}}]),e}(),kl=function(){function e(t){var n=this;f(this,e),this.viewChildren=t.children,this.viewFocusables=t.focusables,this.viewItemsView=t.itemsView,this.viewFocusTracker=t.focusTracker,this.viewLocale=t.locale,this.ungroupedItems=t.createCollection(),this.groupedItems=t.createCollection(),this.groupedItemsDropdown=this._createGroupedItemsDropdown(),this.resizeObserver=null,this.cachedPadding=null,t.itemsView.children.bindTo(this.ungroupedItems).using((function(e){return e})),this.ungroupedItems.on("add",this._updateFocusCycleableItems.bind(this)),this.ungroupedItems.on("remove",this._updateFocusCycleableItems.bind(this)),t.children.on("add",this._updateFocusCycleableItems.bind(this)),t.children.on("remove",this._updateFocusCycleableItems.bind(this)),t.items.on("add",(function(e,t,r){r>n.ungroupedItems.length?n.groupedItems.add(t,r-n.ungroupedItems.length):n.ungroupedItems.add(t,r),n._updateGrouping()})),t.items.on("remove",(function(e,t,r){r>n.ungroupedItems.length?n.groupedItems.remove(t):n.ungroupedItems.remove(t),n._updateGrouping()})),t.extendTemplate({attributes:{class:["ck-toolbar_grouping"]}})}return d(e,[{key:"render",value:function(e){this.viewElement=e.element,this._enableGroupingOnResize()}},{key:"destroy",value:function(){this.groupedItemsDropdown.destroy(),this.resizeObserver.disconnect()}},{key:"_updateGrouping",value:function(){if(this.viewElement.ownerDocument.body.contains(this.viewElement)){for(var e;this._areItemsOverflowing;)this._groupLastItem(),e=!0;if(!e&&this.groupedItems.length){for(;this.groupedItems.length&&!this._areItemsOverflowing;)this._ungroupFirstItem();this._areItemsOverflowing&&this._groupLastItem()}}}},{key:"_enableGroupingOnResize",value:function(){var e,t,n=this;this.resizeObserver=(t=function(t){var r=c(t,1)[0];e&&e===r.contentRect.width||(n._updateGrouping(),e=r.contentRect.width)},"function"==typeof Dr.window.ResizeObserver?new Dr.window.ResizeObserver(t):new el(t)),this.resizeObserver.observe(this.viewElement),this._updateGrouping()}},{key:"_groupLastItem",value:function(){this.groupedItems.length||(this.viewChildren.add(new Zs),this.viewChildren.add(this.groupedItemsDropdown),this.viewFocusTracker.add(this.groupedItemsDropdown.element)),this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last),0)}},{key:"_ungroupFirstItem",value:function(){this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first)),this.groupedItems.length||(this.viewChildren.remove(this.groupedItemsDropdown),this.viewChildren.remove(this.viewChildren.last),this.viewFocusTracker.remove(this.groupedItemsDropdown.element))}},{key:"_createGroupedItemsDropdown",value:function(){var e=this.viewLocale,t=e.t,n=vl(e);return n.class="ck-toolbar__grouped-dropdown",n.panelPosition="ltr"===e.uiLanguageDirection?"sw":"se",function(e,t){var n=e.locale,r=n.t,i=e.toolbarView=new gl(n);i.set("ariaLabel",r("bm")),e.extendTemplate({attributes:{class:["ck-toolbar-dropdown"]}}),[].map((function(e){return i.items.add(e)})),e.panelView.children.add(i),i.items.delegate("execute").to(e)}(n),n.buttonView.set({label:t("br"),tooltip:!0,icon:'<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="9.5" cy="4.5" r="1.5"/><circle cx="9.5" cy="10.5" r="1.5"/><circle cx="9.5" cy="16.5" r="1.5"/></svg>\n'}),n.toolbarView.items.bindTo(this.groupedItems).using((function(e){return e})),n}},{key:"_updateFocusCycleableItems",value:function(){var e=this;this.viewFocusables.clear(),this.ungroupedItems.map((function(t){e.viewFocusables.add(t)})),this.groupedItems.length&&this.viewFocusables.add(this.groupedItemsDropdown)}},{key:"_areItemsOverflowing",get:function(){if(!this.ungroupedItems.length)return!1;var e=this.viewElement,t=this.viewLocale.uiLanguageDirection,n=new Ii(e.lastChild),r=new Ii(e);if(!this.cachedPadding){var i=Dr.window.getComputedStyle(e),o="ltr"===t?"paddingRight":"paddingLeft";this.cachedPadding=Number.parseInt(i[o])}return"ltr"===t?n.right>r.right-this.cachedPadding:n.left<r.left+this.cachedPadding}}]),e}();n(41);var wl=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};return f(this,t),(r=h(this,p(t).call(this,e))).stickyPanel=new Ks(e),r.toolbar=new gl(e,{shouldGroupWhenFull:i.shouldToolbarGroupWhenFull}),r.editable=new $s(e,n),r}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.stickyPanel.content.add(this.toolbar),this.top.add(this.stickyPanel),this.main.add(this.editable)}}]),t}(Ys),_l=function(e){function t(e,n){var r;f(this,t),r=h(this,p(t).call(this,n)),Mt(e)&&(r.sourceElement=e),r.data.processor=new ds,r.model.document.createRoot();var i=!r.config.get("toolbar.shouldNotGroupWhenFull"),a=new wl(r.locale,r.editing.view,{shouldToolbarGroupWhenFull:i});return r.ui=new 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cannot be used together with initial data passed in Editor.create().",null);var t=n.initialData||function(e){return Mt(e)?(t=e)instanceof HTMLTextAreaElement?t.value:t.innerHTML:e;var t}(e);return i.data.init(t)})).then((function(){return i.fire("ready")})).then((function(){return i})))}))}}]),t}(us);Yt(_l,{setData:function(e){this.data.set(e)},getData:function(e){return this.data.get(e)}}),Yt(_l,cs);var xl=function(){function e(t){f(this,e),this.editor=t}return d(e,[{key:"destroy",value:function(){this.stopListening()}}]),e}();Yt(xl,wn);var Tl=function(){function e(t){f(this,e),this.files=function(e){var t=e.files?Array.from(e.files):[],n=e.items?Array.from(e.items):[];return t.length?t:n.filter((function(e){return"file"===e.kind})).map((function(e){return e.getAsFile()}))}(t),this._native=t}return d(e,[{key:"getData",value:function(e){return this._native.getData(e)}},{key:"setData",value:function(e,t){this._native.setData(e,t)}},{key:"types",get:function(){return this._native.types}}]),e}(),Cl=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).document;function i(e,t){t.preventDefault();var n=t.dropRange?[t.dropRange]:Array.from(r.selection.getRanges()),i=new Dt(r,"clipboardInput");r.fire(i,{dataTransfer:t.dataTransfer,targetRanges:n}),i.stop.called&&t.stopPropagation()}return n.domEventType=["paste","copy","cut","drop","dragover"],n.listenTo(r,"paste",i,{priority:"low"}),n.listenTo(r,"drop",i,{priority:"low"}),n}return v(t,e),d(t,[{key:"onDomEvent",value:function(e){var t={dataTransfer:new Tl(e.clipboardData?e.clipboardData:e.dataTransfer)};"drop"==e.type&&(t.dropRange=function(e,t){var n,r=t.target.ownerDocument,i=t.clientX,o=t.clientY;return r.caretRangeFromPoint&&r.caretRangeFromPoint(i,o)?n=r.caretRangeFromPoint(i,o):t.rangeParent&&((n=r.createRange()).setStart(t.rangeParent,t.rangeOffset),n.collapse(!0)),n?e.domConverter.domRangeToView(n):e.document.selection.getFirstRange()}(this.view,e)),this.fire(e.type,e,t)}}]),t}(di),Sl=["figcaption","li"],El=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.model.document,r=t.editing.view,i=r.document;function o(e,r){var o=r.dataTransfer;r.preventDefault();var a=t.data.toView(t.model.getSelectedContent(n.selection));i.fire("clipboardOutput",{dataTransfer:o,content:a,method:e.name})}this._htmlDataProcessor=new ds,r.addObserver(Cl),this.listenTo(i,"clipboardInput",(function(e){t.isReadOnly&&e.stop()}),{priority:"highest"}),this.listenTo(i,"clipboardInput",(function(t,n){var i=n.dataTransfer,o="";i.getData("text/html")?o=function(e){return e.replace(/<span(?: class="Apple-converted-space"|)>(\s+)<\/span>/g,(function(e,t){return 1==t.length?" ":t}))}(i.getData("text/html")):i.getData("text/plain")&&(o=function(e){return(e=e.replace(/</g,"<").replace(/>/g,">").replace(/\n/g,"</p><p>").replace(/^\s/," ").replace(/\s$/," ").replace(/\s\s/g,"  ")).indexOf("</p><p>")>-1&&(e="<p>".concat(e,"</p>")),e}(i.getData("text/plain"))),o=e._htmlDataProcessor.toView(o),e.fire("inputTransformation",{content:o,dataTransfer:i}),r.scrollToTheSelection()}),{priority:"low"}),this.listenTo(this,"inputTransformation",(function(t,n){if(!n.content.isEmpty){var r=e.editor.data,i=e.editor.model,o=r.toModel(n.content,"$clipboardHolder");if(0==o.childCount)return;i.insertContent(o)}}),{priority:"low"}),this.listenTo(i,"copy",o,{priority:"low"}),this.listenTo(i,"cut",(function(e,n){t.isReadOnly?n.preventDefault():o(e,n)}),{priority:"low"}),this.listenTo(i,"clipboardOutput",(function(r,i){i.content.isEmpty||(i.dataTransfer.setData("text/html",e._htmlDataProcessor.toData(i.content)),i.dataTransfer.setData("text/plain",function e(t){var n="";if(t.is("text")||t.is("textProxy"))n=t.data;else if(t.is("img")&&t.hasAttribute("alt"))n=t.getAttribute("alt");else{var r=null,i=!0,o=!1,a=void 0;try{for(var s,l=t.getChildren()[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=e(u);r&&(r.is("containerElement")||u.is("containerElement"))&&(Sl.includes(r.name)||Sl.includes(u.name)?n+="\n":n+="\n\n"),n+=c,r=u}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}return n}(i.content))),"cut"==i.method&&t.model.deleteContent(n.selection)}),{priority:"low"})}}],[{key:"pluginName",get:function(){return"Clipboard"}}]),t}(xl),Al=function(){function e(t){var n=this;f(this,e),this.editor=t,this.set("value",void 0),this.set("isEnabled",!1),this._disableStack=new Set,this.decorate("execute"),this.listenTo(this.editor.model.document,"change",(function(){n.refresh()})),this.on("execute",(function(e){n.isEnabled||e.stop()}),{priority:"high"}),this.listenTo(t,"change:isReadOnly",(function(e,t,r){r?n.forceDisabled("readOnlyMode"):n.clearForceDisabled("readOnlyMode")}))}return d(e,[{key:"refresh",value:function(){this.isEnabled=!0}},{key:"forceDisabled",value:function(e){this._disableStack.add(e),1==this._disableStack.size&&(this.on("set:isEnabled",Pl,{priority:"highest"}),this.isEnabled=!1)}},{key:"clearForceDisabled",value:function(e){this._disableStack.delete(e),0==this._disableStack.size&&(this.off("set:isEnabled",Pl),this.refresh())}},{key:"execute",value:function(){}},{key:"destroy",value:function(){this.stopListening()}}]),e}();function Pl(e){e.return=!1,e.stop()}function Ml(e,t){var n,r,i,o,a,l;return s.wrap((function(s){for(;;)switch(s.prev=s.next){case 0:n=!0,r=!1,i=void 0,s.prev=3,o=t[Symbol.iterator]();case 5:if(n=(a=o.next()).done){s.next=14;break}if(l=a.value,s.t0=l&&e.getAttributeProperties(l[0]).copyOnEnter,!s.t0){s.next=11;break}return s.next=11,l;case 11:n=!0,s.next=5;break;case 14:s.next=20;break;case 16:s.prev=16,s.t1=s.catch(3),r=!0,i=s.t1;case 20:s.prev=20,s.prev=21,n||null==o.return||o.return();case 23:if(s.prev=23,!r){s.next=26;break}throw i;case 26:return s.finish(23);case 27:return s.finish(20);case 28:case"end":return s.stop()}}),g,null,[[3,16,20,28],[21,,23,27]])}Yt(Al,wn);var Ol=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document;t.change((function(r){!function(e,t,n,r){var i=n.isCollapsed,o=n.getFirstRange(),a=o.start.parent,s=o.end.parent;if(r.isLimit(a)||r.isLimit(s))i||a!=s||e.deleteContent(n);else if(i){var l=Ml(t.model.schema,n.getAttributes());Nl(t,o.start),t.setSelectionAttribute(l)}else{var u=!(o.start.isAtStart&&o.end.isAtEnd),c=a==s;e.deleteContent(n,{leaveUnmerged:u}),u&&(c?Nl(t,n.focus):t.setSelection(s,0))}}(e.editor.model,r,n.selection,t.schema),e.fire("afterExecute",{writer:r})}))}}]),t}(Al);function Nl(e,t){e.split(t),e.setSelection(t.parent.nextSibling,0)}var Il=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).document;return r.on("keydown",(function(e,t){var i;n.isEnabled&&t.keyCode==Kn.enter&&(r.once("enter",(function(e){return i=e}),{priority:"highest"}),r.fire("enter",new fi(r,t.domEvent,{isSoft:t.shiftKey})),i&&i.stop.called&&e.stop())})),n}return v(t,e),d(t,[{key:"observe",value:function(){}}]),t}(Yr),Dl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.editing.view,n=t.document;t.addObserver(Il),e.commands.add("enter",new Ol(e)),this.listenTo(n,"enter",(function(n,r){r.preventDefault(),r.isSoft||(e.execute("enter"),t.scrollToTheSelection())}),{priority:"low"})}}],[{key:"pluginName",get:function(){return"Enter"}}]),t}(xl),Rl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document;t.change((function(r){!function(e,t,n){var r=n.isCollapsed,i=n.getFirstRange(),o=i.start.parent,a=i.end.parent,s=o==a;if(r){var l=Ml(e.schema,n.getAttributes());jl(t,i.end),t.removeSelectionAttribute(n.getAttributeKeys()),t.setSelectionAttribute(l)}else{var u=!(i.start.isAtStart&&i.end.isAtEnd);e.deleteContent(n,{leaveUnmerged:u}),s?jl(t,n.focus):u&&t.setSelection(a,0)}}(t,r,n.selection),e.fire("afterExecute",{writer:r})}))}},{key:"refresh",value:function(){var e=this.editor.model,t=e.document;this.isEnabled=function(e,t){if(t.rangeCount>1)return!1;var n=t.anchor;if(!n||!e.checkChild(n,"softBreak"))return!1;var r=t.getFirstRange(),i=r.start.parent,o=r.end.parent;return!Ll(i,e)&&!Ll(o,e)||i===o}(e.schema,t.selection)}}]),t}(Al);function jl(e,t){var n=e.createElement("softBreak");e.insert(n,t),e.setSelection(n,"after")}function Ll(e,t){return!e.is("rootElement")&&(t.isLimit(e)||Ll(e.parent,t))}for(var Fl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.conversion,r=e.editing.view,i=r.document;t.register("softBreak",{allowWhere:"$text",isInline:!0}),n.for("upcast").elementToElement({model:"softBreak",view:"br"}),n.for("downcast").elementToElement({model:"softBreak",view:function(e,t){return t.createEmptyElement("br")}}),r.addObserver(Il),e.commands.add("shiftEnter",new Rl(e)),this.listenTo(i,"enter",(function(t,n){n.preventDefault(),n.isSoft&&(e.execute("shiftEnter"),r.scrollToTheSelection())}),{priority:"low"})}}],[{key:"pluginName",get:function(){return"ShiftEnter"}}]),t}(xl),zl=function(){function e(t){var n=this,r=arguments.length>1&&void 0!==arguments[1]?arguments[1]:20;f(this,e),this.model=t,this.size=0,this.limit=r,this.isLocked=!1,this._changeCallback=function(e,t){"transparent"!=t.type&&t!==n._batch&&n._reset(!0)},this._selectionChangeCallback=function(){n._reset()},this.model.document.on("change",this._changeCallback),this.model.document.selection.on("change:range",this._selectionChangeCallback),this.model.document.selection.on("change:attribute",this._selectionChangeCallback)}return d(e,[{key:"input",value:function(e){this.size+=e,this.size>=this.limit&&this._reset(!0)}},{key:"lock",value:function(){this.isLocked=!0}},{key:"unlock",value:function(){this.isLocked=!1}},{key:"destroy",value:function(){this.model.document.off("change",this._changeCallback),this.model.document.selection.off("change:range",this._selectionChangeCallback),this.model.document.selection.off("change:attribute",this._selectionChangeCallback)}},{key:"_reset",value:function(e){this.isLocked&&!e||(this._batch=null,this.size=0)}},{key:"batch",get:function(){return this._batch||(this._batch=this.model.createBatch()),this._batch}}]),e}(),Vl=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e)))._buffer=new zl(e.model,n),r._batches=new WeakSet,r}return v(t,e),d(t,[{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this._buffer.destroy()}},{key:"execute",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=this.editor.model,r=n.document,i=t.text||"",o=i.length,a=t.range||r.selection.getFirstRange(),s=t.resultRange;n.enqueueChange(this._buffer.batch,(function(t){var l=a.isCollapsed;e._buffer.lock(),n.deleteContent(n.createSelection(a)),i&&n.insertContent(t.createText(i,r.selection.getAttributes()),a.start),s?t.setSelection(s):l&&t.setSelection(a.start.getShiftedBy(o)),e._buffer.unlock(),e._buffer.input(o),e._batches.add(e._buffer.batch)}))}},{key:"buffer",get:function(){return this._buffer}}]),t}(Al),Bl=[Jn("arrowUp"),Jn("arrowRight"),Jn("arrowDown"),Jn("arrowLeft"),9,16,17,18,19,20,27,33,34,35,36,45,91,93,144,145,173,174,175,176,177,178,179,255],Ul=112;Ul<=135;Ul++)Bl.push(Ul);function Hl(e){if(e.newChildren.length-e.oldChildren.length==1){var t=function(e,t){var n,r=[],i=0;return e.forEach((function(e){"equal"==e?(o(),i++):"insert"==e?(a("insert")?n.values.push(t[i]):(o(),n={type:"insert",index:i,values:[t[i]]}),i++):a("delete")?n.howMany++:(o(),n={type:"delete",index:i,howMany:1})})),o(),r;function o(){n&&(r.push(n),n=null)}function a(e){return n&&n.type==e}}(Sr(e.oldChildren,e.newChildren,ql),e.newChildren);if(!(t.length>1)){var n=t[0];return n.values[0]&&n.values[0].is("text")?n:void 0}}}function ql(e,t){return e&&e.is("text")&&t&&t.is("text")?e.data===t.data:e===t}var Wl=function(){function e(t){f(this,e),this.editor=t,this.editing=this.editor.editing}return d(e,[{key:"handle",value:function(e,t){if(function(e){if(0==e.length)return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if("children"===a.type&&!Hl(a))return!0}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!1}(e))this._handleContainerChildrenMutations(e,t);else{var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._handleTextMutation(s,t),this._handleTextNodeInsertion(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}},{key:"_handleContainerChildrenMutations",value:function(e,t){var n=function(e){var t=e.map((function(e){return e.node})).reduce((function(e,t){return e.getCommonAncestor(t,{includeSelf:!0})}));if(t)return t.getAncestors({includeSelf:!0,parentFirst:!0}).find((function(e){return e.is("containerElement")||e.is("rootElement")}))}(e);if(n){var r=this.editor.editing.view.domConverter.mapViewToDom(n),i=new Fr,o=this.editor.data.toModel(i.domToView(r)).getChild(0),a=this.editor.editing.mapper.toModelElement(n);if(a){var s=Array.from(o.getChildren()),l=Array.from(a.getChildren()),u=s[s.length-1],c=l[l.length-1];u&&u.is("softBreak")&&c&&!c.is("softBreak")&&s.pop();var f=this.editor.model.schema;if(Yl(s,f)&&Yl(l,f)){var d=s.map((function(e){return e.is("text")?e.data:"@"})).join("").replace(/\u00A0/g," "),h=l.map((function(e){return e.is("text")?e.data:"@"})).join("").replace(/\u00A0/g," ");if(h!==d){var p=$l(Sr(h,d)),v=p.firstChangeAt,m=p.insertions,g=p.deletions,y=null;t&&(y=this.editing.mapper.toModelRange(t.getFirstRange()));var b=d.substr(v,m),k=this.editor.model.createRange(this.editor.model.createPositionAt(a,v),this.editor.model.createPositionAt(a,v+g));this.editor.execute("input",{text:b,range:k,resultRange:y})}}}}}},{key:"_handleTextMutation",value:function(e,t){if("text"==e.type){var n=e.newText.replace(/\u00A0/g," "),r=e.oldText.replace(/\u00A0/g," ");if(r!==n){var i=$l(Sr(r,n)),o=i.firstChangeAt,a=i.insertions,s=i.deletions,l=null;t&&(l=this.editing.mapper.toModelRange(t.getFirstRange()));var u=this.editing.view.createPositionAt(e.node,o),c=this.editing.mapper.toModelPosition(u),f=this.editor.model.createRange(c,c.getShiftedBy(s)),d=n.substr(o,a);this.editor.execute("input",{text:d,range:f,resultRange:l})}}}},{key:"_handleTextNodeInsertion",value:function(e){if("children"==e.type){var t=Hl(e),n=this.editing.view.createPositionAt(e.node,t.index),r=this.editing.mapper.toModelPosition(n),i=t.values[0].data;this.editor.execute("input",{text:i.replace(/\u00A0/g," "),range:this.editor.model.createRange(r)})}}}]),e}();function Yl(e,t){return e.every((function(e){return t.isInline(e)}))}function $l(e){for(var t=null,n=null,r=0;r<e.length;r++)"equal"!=e[r]&&(t=null===t?r:t,n=r);for(var i=0,o=0,a=t;a<=n;a++)"insert"!=e[a]&&i++,"delete"!=e[a]&&o++;return{insertions:o,deletions:i,firstChangeAt:t}}var Gl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=new Vl(e,e.config.get("typing.undoStep")||20);e.commands.add("input",t),function(e){var t=null,n=e.model,r=e.editing.view,i=e.commands.get("input");function o(e){var o=n.document,s=r.document.isComposing,l=t&&t.isEqual(o.selection);t=null,i.isEnabled&&(function(e){return!!e.ctrlKey||Bl.includes(e.keyCode)}(e)||o.selection.isCollapsed||s&&229===e.keyCode||!s&&229===e.keyCode&&l||a())}function a(){var e=i.buffer;e.lock(),n.enqueueChange(e.batch,(function(){n.deleteContent(n.document.selection)})),e.unlock()}$n.isAndroid?r.document.on("beforeinput",(function(e,t){return o(t)}),{priority:"lowest"}):r.document.on("keydown",(function(e,t){return o(t)}),{priority:"lowest"}),r.document.on("compositionstart",(function(){var e=n.document,t=1!==e.selection.rangeCount||e.selection.getFirstRange().isFlat;e.selection.isCollapsed||t||a()}),{priority:"lowest"}),r.document.on("compositionend",(function(){t=n.createSelection(n.document.selection)}),{priority:"lowest"})}(e),function(e){e.editing.view.document.on("mutations",(function(t,n,r){new Wl(e).handle(n,r)}))}(e)}},{key:"isInput",value:function(e){return this.editor.commands.get("input")._batches.has(e)}}],[{key:"pluginName",get:function(){return"Input"}}]),t}(xl),Ql=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).direction=n,r._buffer=new zl(e.model,e.config.get("typing.undoStep")),r}return v(t,e),d(t,[{key:"execute",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=this.editor.model,r=n.document;n.enqueueChange(this._buffer.batch,(function(i){e._buffer.lock();var o=i.createSelection(t.selection||r.selection),a=o.isCollapsed;if(o.isCollapsed&&n.modifySelection(o,{direction:e.direction,unit:t.unit}),e._shouldEntireContentBeReplacedWithParagraph(t.sequence||1))e._replaceEntireContentWithParagraph(i);else if(!o.isCollapsed){var s=0;o.getFirstRange().getMinimalFlatRanges().forEach((function(e){s+=Rn(e.getWalker({singleCharacters:!0,ignoreElementEnd:!0,shallow:!0}))})),n.deleteContent(o,{doNotResetEntireContent:a}),e._buffer.input(s),i.setSelection(o),e._buffer.unlock()}}))}},{key:"_shouldEntireContentBeReplacedWithParagraph",value:function(e){if(e>1)return!1;var t=this.editor.model,n=t.document.selection,r=t.schema.getLimitElement(n);if(!n.isCollapsed||!n.containsEntireContent(r))return!1;if(!t.schema.checkChild(r,"paragraph"))return!1;var i=r.getChild(0);return!i||"paragraph"!==i.name}},{key:"_replaceEntireContentWithParagraph",value:function(e){var t=this.editor.model,n=t.document.selection,r=t.schema.getLimitElement(n),i=e.createElement("paragraph");e.remove(e.createRangeIn(r)),e.insert(i,r),e.setSelection(i,0)}},{key:"buffer",get:function(){return this._buffer}}]),t}(Al),Kl=function(e){function t(e){var n;f(this,t),n=h(this,p(t).call(this,e));var r=e.document,i=0;function o(e,t,n){var i;r.once("delete",(function(e){return i=e}),{priority:Number.POSITIVE_INFINITY}),r.fire("delete",new fi(r,t,n)),i&&i.stop.called&&e.stop()}return r.on("keyup",(function(e,t){t.keyCode!=Kn.delete&&t.keyCode!=Kn.backspace||(i=0)})),r.on("keydown",(function(e,t){var n={};if(t.keyCode==Kn.delete)n.direction="forward",n.unit="character";else{if(t.keyCode!=Kn.backspace)return;n.direction="backward",n.unit="codePoint"}var r=$n.isMac?t.altKey:t.ctrlKey;n.unit=r?"word":n.unit,n.sequence=++i,o(e,t.domEvent,n)})),$n.isAndroid&&r.on("beforeinput",(function(t,n){if("deleteContentBackward"==n.domEvent.inputType){var r={unit:"codepoint",direction:"backward",sequence:1},i=n.domTarget.ownerDocument.defaultView.getSelection();i.anchorNode==i.focusNode&&i.anchorOffset+1!=i.focusOffset&&(r.selectionToRemove=e.domConverter.domSelectionToView(i)),o(t,n.domEvent,r)}})),n}return v(t,e),d(t,[{key:"observe",value:function(){}}]),t}(Yr),Jl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.editing.view,n=t.document;if(t.addObserver(Kl),e.commands.add("forwardDelete",new Ql(e,"forward")),e.commands.add("delete",new Ql(e,"backward")),this.listenTo(n,"delete",(function(n,r){var i={unit:r.unit,sequence:r.sequence};if(r.selectionToRemove){var o=e.model.createSelection(),a=[],s=!0,l=!1,u=void 0;try{for(var c,f=r.selectionToRemove.getRanges()[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;a.push(e.editing.mapper.toModelRange(d))}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}o.setTo(a),i.selection=o}e.execute("forward"==r.direction?"forwardDelete":"delete",i),r.preventDefault(),t.scrollToTheSelection()})),$n.isAndroid){var r=null;this.listenTo(n,"delete",(function(e,t){var n=t.domTarget.ownerDocument.defaultView.getSelection();r={anchorNode:n.anchorNode,anchorOffset:n.anchorOffset,focusNode:n.focusNode,focusOffset:n.focusOffset}}),{priority:"lowest"}),this.listenTo(n,"keyup",(function(e,t){if(r){var n=t.domTarget.ownerDocument.defaultView.getSelection();n.collapse(r.anchorNode,r.anchorOffset),n.extend(r.focusNode,r.focusOffset),r=null}}))}}}],[{key:"pluginName",get:function(){return"Delete"}}]),t}(xl),Xl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[Gl,Jl]}},{key:"pluginName",get:function(){return"Typing"}}]),t}(xl),Zl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.baseVersion+1)}},{key:"_execute",value:function(){}},{key:"type",get:function(){return"noop"}}],[{key:"className",get:function(){return"NoOperation"}}]),t}(sa),eu=new Map;function tu(e,t,n){var r=eu.get(e);r||(r=new Map,eu.set(e,r)),r.set(t,n)}function nu(e){return[e]}function ru(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=function(e,t){var n=eu.get(e);return n&&n.has(t)?n.get(t):nu}(e.constructor,t.constructor);try{return r(e=e.clone(),t,n)}catch(e){throw e}}function iu(e,t,n){e=e.slice(),t=t.slice();var r=new ou(n.document,n.useRelations,n.forceWeakRemove);r.setOriginalOperations(e),r.setOriginalOperations(t);var i=r.originalOperations;if(0==e.length||0==t.length)return{operationsA:e,operationsB:t,originalOperations:i};var o=new WeakMap,a=!0,s=!1,l=void 0;try{for(var c,f=e[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var d=c.value;o.set(d,0)}}catch(M){s=!0,l=M}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}for(var h={nextBaseVersionA:e[e.length-1].baseVersion+1,nextBaseVersionB:t[t.length-1].baseVersion+1,originalOperationsACount:e.length,originalOperationsBCount:t.length},p=0;p<e.length;){var v,m,g=e[p],y=o.get(g);if(y!=t.length){var b=t[y],k=ru(g,b,r.getContext(g,b,!0)),w=ru(b,g,r.getContext(b,g,!1));r.updateRelation(g,b),r.setOriginalOperations(k,g),r.setOriginalOperations(w,b);var _=!0,x=!1,T=void 0;try{for(var C,S=k[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;o.set(E,y+w.length)}}catch(M){x=!0,T=M}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}(v=e).splice.apply(v,[p,1].concat(u(k))),(m=t).splice.apply(m,[y,1].concat(u(w)))}else p++}if(n.padWithNoOps){var A=e.length-h.originalOperationsACount,P=t.length-h.originalOperationsBCount;su(e,P-A),su(t,A-P)}return au(e,h.nextBaseVersionB),au(t,h.nextBaseVersionA),{operationsA:e,operationsB:t,originalOperations:i}}var ou=function(){function e(t,n){var r=arguments.length>2&&void 0!==arguments[2]&&arguments[2];f(this,e),this.originalOperations=new Map,this._history=t.history,this._useRelations=n,this._forceWeakRemove=!!r,this._relations=new Map}return d(e,[{key:"setOriginalOperations",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,n=t?this.originalOperations.get(t):null,r=!0,i=!1,o=void 0;try{for(var a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;this.originalOperations.set(l,n||l)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}},{key:"updateRelation",value:function(e,t){switch(e.constructor){case ba:switch(t.constructor){case Ta:e.targetPosition.isEqual(t.sourcePosition)||t.movedRange.containsPosition(e.targetPosition)?this._setRelation(e,t,"insertAtSource"):e.targetPosition.isEqual(t.deletionPosition)?this._setRelation(e,t,"insertBetween"):e.targetPosition.isAfter(t.sourcePosition)&&this._setRelation(e,t,"moveTargetAfter");break;case ba:e.targetPosition.isEqual(t.sourcePosition)||e.targetPosition.isBefore(t.sourcePosition)?this._setRelation(e,t,"insertBefore"):this._setRelation(e,t,"insertAfter")}break;case Ca:switch(t.constructor){case Ta:e.splitPosition.isBefore(t.sourcePosition)&&this._setRelation(e,t,"splitBefore");break;case ba:(e.splitPosition.isEqual(t.sourcePosition)||e.splitPosition.isBefore(t.sourcePosition))&&this._setRelation(e,t,"splitBefore")}break;case Ta:switch(t.constructor){case Ta:e.targetPosition.isEqual(t.sourcePosition)||this._setRelation(e,t,"mergeTargetNotMoved"),e.sourcePosition.isEqual(t.targetPosition)&&this._setRelation(e,t,"mergeSourceNotMoved"),e.sourcePosition.isEqual(t.sourcePosition)&&this._setRelation(e,t,"mergeSameElement");break;case Ca:e.sourcePosition.isEqual(t.splitPosition)&&this._setRelation(e,t,"splitAtSource")}break;case wa:var n=e.newRange;if(!n)return;switch(t.constructor){case ba:var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany),i=r.containsPosition(n.start)||r.start.isEqual(n.start),o=r.containsPosition(n.end)||r.end.isEqual(n.end);!i&&!o||r.containsRange(n)||this._setRelation(e,t,{side:i?"left":"right",path:i?n.start.path.slice():n.end.path.slice()});break;case Ta:var 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r=e.range._getTransformedByMergeOperation(t);return r.isCollapsed||n.push(r),n.map((function(t){return new ga(t,e.key,e.oldValue,e.newValue,e.baseVersion)}))})),tu(ga,ba,(function(e,t){return function(e,t){var n=no._createFromPositionAndShift(t.sourcePosition,t.howMany),r=null,i=[];n.containsRange(e,!0)?r=e:e.start.hasSameParentAs(n.start)?(i=e.getDifference(n),r=e.getIntersection(n)):i=[e];var o=[],a=!0,s=!1,l=void 0;try{for(var c,f=i[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var d=c.value;d=d._getTransformedByDeletion(t.sourcePosition,t.howMany);var h=t.getMovedRangeStart(),p=d.start.hasSameParentAs(h);d=d._getTransformedByInsertion(h,t.howMany,p),o.push.apply(o,u(d))}}catch(v){s=!0,l=v}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}return r&&o.push(r._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany,!1)[0]),o}(e.range,t).map((function(t){return new 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e.position=e.position._getTransformedByMoveOperation(t),[e]})),tu(ka,Ca,(function(e,t){return e.position=e.position._getTransformedBySplitOperation(t),[e]})),tu(ka,Ta,(function(e,t){return e.position=e.position._getTransformedByMergeOperation(t),[e]})),tu(wa,ka,(function(e,t){return e.oldRange&&(e.oldRange=e.oldRange._getTransformedByInsertOperation(t)[0]),e.newRange&&(e.newRange=e.newRange._getTransformedByInsertOperation(t)[0]),[e]})),tu(wa,wa,(function(e,t,n){if(e.name==t.name){if(!n.aIsStrong)return[new Zl(0)];e.oldRange=t.newRange?t.newRange.clone():null}return[e]})),tu(wa,Ta,(function(e,t){return e.oldRange&&(e.oldRange=e.oldRange._getTransformedByMergeOperation(t)),e.newRange&&(e.newRange=e.newRange._getTransformedByMergeOperation(t)),[e]})),tu(wa,ba,(function(e,t,n){if(e.oldRange&&(e.oldRange=no._createFromRanges(e.oldRange._getTransformedByMoveOperation(t))),e.newRange){if(n.abRelation){var r=no._createFromRanges(e.newRange._getTransformedByMoveOperation(t));if("left"==n.abRelation.side&&t.targetPosition.isEqual(e.newRange.start))return e.newRange.start.path=n.abRelation.path,e.newRange.end=r.end,[e];if("right"==n.abRelation.side&&t.targetPosition.isEqual(e.newRange.end))return e.newRange.start=r.start,e.newRange.end.path=n.abRelation.path,[e]}e.newRange=no._createFromRanges(e.newRange._getTransformedByMoveOperation(t))}return[e]})),tu(wa,Ca,(function(e,t,n){if(e.oldRange&&(e.oldRange=e.oldRange._getTransformedBySplitOperation(t)),e.newRange){if(n.abRelation){var r=e.newRange._getTransformedBySplitOperation(t);return e.newRange.start.isEqual(t.splitPosition)&&n.abRelation.wasStartBeforeMergedElement?e.newRange.start=to._createAt(t.insertionPosition):e.newRange.start.isEqual(t.splitPosition)&&!n.abRelation.wasInLeftElement&&(e.newRange.start=to._createAt(t.moveTargetPosition)),e.newRange.end.isEqual(t.splitPosition)&&n.abRelation.wasInRightElement?e.newRange.end=to._createAt(t.moveTargetPosition):e.newRange.end.isEqual(t.splitPosition)&&n.abRelation.wasEndBeforeMergedElement?e.newRange.end=to._createAt(t.insertionPosition):e.newRange.end=r.end,[e]}e.newRange=e.newRange._getTransformedBySplitOperation(t)}return[e]})),tu(Ta,ka,(function(e,t){return e.sourcePosition.hasSameParentAs(t.position)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByInsertOperation(t),e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t),[e]})),tu(Ta,Ta,(function(e,t,n){if(e.sourcePosition.isEqual(t.sourcePosition)&&e.targetPosition.isEqual(t.targetPosition)){if(n.bWasUndone){var r=t.graveyardPosition.path.slice();return r.push(0),e.sourcePosition=new to(t.graveyardPosition.root,r),e.howMany=0,[e]}return[new Zl(0)]}if(e.sourcePosition.isEqual(t.sourcePosition)&&!e.targetPosition.isEqual(t.targetPosition)&&!n.bWasUndone&&"splitAtSource"!=n.abRelation){var i="$graveyard"==e.targetPosition.root.rootName,o="$graveyard"==t.targetPosition.root.rootName;if(o&&!i||(!i||o)&&n.aIsStrong){var a=t.targetPosition._getTransformedByMergeOperation(t),s=e.targetPosition._getTransformedByMergeOperation(t);return[new ba(a,e.howMany,s,0)]}return[new Zl(0)]}return e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMergeOperation(t),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),e.graveyardPosition.isEqual(t.graveyardPosition)&&n.aIsStrong||(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]})),tu(Ta,ba,(function(e,t,n){var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany);return"remove"==t.type&&!n.bWasUndone&&!n.forceWeakRemove&&e.deletionPosition.hasSameParentAs(t.sourcePosition)&&r.containsPosition(e.sourcePosition)?[new Zl(0)]:(e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition.hasSameParentAs(t.sourcePosition)&&(e.howMany-=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMoveOperation(t),e.targetPosition=e.targetPosition._getTransformedByMoveOperation(t),e.graveyardPosition.isEqual(t.targetPosition)||(e.graveyardPosition=e.graveyardPosition._getTransformedByMoveOperation(t)),[e])})),tu(Ta,Ca,(function(e,t,n){if(t.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByDeletion(t.graveyardPosition,1),e.deletionPosition.isEqual(t.graveyardPosition)&&(e.howMany=t.howMany)),e.targetPosition.isEqual(t.splitPosition)){var r=0!=t.howMany,i=t.graveyardPosition&&e.deletionPosition.isEqual(t.graveyardPosition);if(r||i||"mergeTargetNotMoved"==n.abRelation)return e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),[e]}if(e.sourcePosition.isEqual(t.splitPosition)){if("mergeSourceNotMoved"==n.abRelation)return e.howMany=0,e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e];if("mergeSameElement"==n.abRelation||e.sourcePosition.offset>0)return e.sourcePosition=t.moveTargetPosition.clone(),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]}return e.sourcePosition.hasSameParentAs(t.splitPosition)&&(e.howMany=t.splitPosition.offset),e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]})),tu(ba,ka,(function(e,t){var n=no._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByInsertOperation(t,!1)[0];return e.sourcePosition=n.start,e.howMany=n.end.offset-n.start.offset,e.targetPosition.isEqual(t.position)||(e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t)),[e]})),tu(ba,ba,(function(e,t,n){var r,i=no._createFromPositionAndShift(e.sourcePosition,e.howMany),o=no._createFromPositionAndShift(t.sourcePosition,t.howMany),a=n.aIsStrong,s=!n.aIsStrong;if("insertBefore"==n.abRelation||"insertAfter"==n.baRelation?s=!0:"insertAfter"!=n.abRelation&&"insertBefore"!=n.baRelation||(s=!1),r=e.targetPosition.isEqual(t.targetPosition)&&s?e.targetPosition._getTransformedByDeletion(t.sourcePosition,t.howMany):e.targetPosition._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),uu(e,t)&&uu(t,e))return[t.getReversed()];if(i.containsPosition(t.targetPosition)&&i.containsRange(o,!0))return i.start=i.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),i.end=i.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),cu([i],r);if(o.containsPosition(e.targetPosition)&&o.containsRange(i,!0))return i.start=i.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),i.end=i.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),cu([i],r);var l=$t(e.sourcePosition.getParentPath(),t.sourcePosition.getParentPath());if("prefix"==l||"extension"==l)return i.start=i.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),i.end=i.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),cu([i],r);"remove"!=e.type||"remove"==t.type||n.aWasUndone||n.forceWeakRemove?"remove"==e.type||"remove"!=t.type||n.bWasUndone||n.forceWeakRemove||(a=!1):a=!0;var c=[],f=i.getDifference(o),d=!0,h=!1,p=void 0;try{for(var v,m=f[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value;g.start=g.start._getTransformedByDeletion(t.sourcePosition,t.howMany),g.end=g.end._getTransformedByDeletion(t.sourcePosition,t.howMany);var y="same"==$t(g.start.getParentPath(),t.getMovedRangeStart().getParentPath()),b=g._getTransformedByInsertion(t.getMovedRangeStart(),t.howMany,y);c.push.apply(c,u(b))}}catch(w){h=!0,p=w}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}var k=i.getIntersection(o);return null!==k&&a&&(k.start=k.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),k.end=k.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),0===c.length?c.push(k):1==c.length?o.start.isBefore(i.start)||o.start.isEqual(i.start)?c.unshift(k):c.push(k):c.splice(1,0,k)),0===c.length?[new Zl(e.baseVersion)]:cu(c,r)})),tu(ba,Ca,(function(e,t,n){var r=e.targetPosition.clone();e.targetPosition.isEqual(t.insertionPosition)&&t.graveyardPosition&&"moveTargetAfter"!=n.abRelation||(r=e.targetPosition._getTransformedBySplitOperation(t));var i=no._createFromPositionAndShift(e.sourcePosition,e.howMany);if(i.end.isEqual(t.insertionPosition))return t.graveyardPosition||e.howMany++,e.targetPosition=r,[e];if(i.start.hasSameParentAs(t.splitPosition)&&i.containsPosition(t.splitPosition)){var o=new no(t.splitPosition,i.end);return o=o._getTransformedBySplitOperation(t),cu([new no(i.start,t.splitPosition),o],r)}e.targetPosition.isEqual(t.splitPosition)&&"insertAtSource"==n.abRelation&&(r=t.moveTargetPosition),e.targetPosition.isEqual(t.insertionPosition)&&"insertBetween"==n.abRelation&&(r=e.targetPosition);var a=[i._getTransformedBySplitOperation(t)];if(t.graveyardPosition){var s=i.start.isEqual(t.graveyardPosition)||i.containsPosition(t.graveyardPosition);e.howMany>1&&s&&!n.aWasUndone&&a.push(no._createFromPositionAndShift(t.insertionPosition,1))}return cu(a,r)})),tu(ba,Ta,(function(e,t,n){var r=no._createFromPositionAndShift(e.sourcePosition,e.howMany);if(t.deletionPosition.hasSameParentAs(e.sourcePosition)&&r.containsPosition(t.sourcePosition))if("remove"!=e.type||n.forceWeakRemove){if(1==e.howMany)return n.bWasUndone?(e.sourcePosition=t.graveyardPosition.clone(),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]):[new Zl(0)]}else if(!n.aWasUndone){var i=[],o=t.graveyardPosition.clone(),a=t.targetPosition._getTransformedByMergeOperation(t);e.howMany>1&&(i.push(new ba(e.sourcePosition,e.howMany-1,e.targetPosition,0)),o=o._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1),a=a._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1));var s=t.deletionPosition._getCombined(e.sourcePosition,e.targetPosition),l=new ba(o,1,s,0),u=l.getMovedRangeStart().path.slice();u.push(0);var c=new to(l.targetPosition.root,u);a=a._getTransformedByMove(o,s,1);var f=new ba(a,t.howMany,c,0);return i.push(l),i.push(f),i}var d=no._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByMergeOperation(t);return e.sourcePosition=d.start,e.howMany=d.end.offset-d.start.offset,e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]})),tu(_a,ka,(function(e,t){return e.position=e.position._getTransformedByInsertOperation(t),[e]})),tu(_a,Ta,(function(e,t){return e.position.isEqual(t.deletionPosition)?(e.position=t.graveyardPosition.clone(),e.position.stickiness="toNext",[e]):(e.position=e.position._getTransformedByMergeOperation(t),[e])})),tu(_a,ba,(function(e,t){return e.position=e.position._getTransformedByMoveOperation(t),[e]})),tu(_a,_a,(function(e,t,n){if(e.position.isEqual(t.position)){if(!n.aIsStrong)return[new Zl(0)];e.oldName=t.newName}return[e]})),tu(_a,Ca,(function(e,t){if("same"==$t(e.position.path,t.splitPosition.getParentPath())&&!t.graveyardPosition){var n=new _a(e.position.getShiftedBy(1),e.oldName,e.newName,0);return[e,n]}return 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a.insertionPosition=o,e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),e.graveyardPosition=a.insertionPosition.clone(),e.graveyardPosition.stickiness="toNext",[a,e]}return e.splitPosition.hasSameParentAs(t.deletionPosition)&&!e.splitPosition.isAfter(t.deletionPosition)&&e.howMany--,e.splitPosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),e.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]})),tu(Ca,ba,(function(e,t,n){var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany);if(e.graveyardPosition){var i=r.start.isEqual(e.graveyardPosition)||r.containsPosition(e.graveyardPosition);if(!n.bWasUndone&&i){var 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e.howMany-=u,e.splitPosition.hasSameParentAs(t.targetPosition)&&e.splitPosition.offset<t.targetPosition.offset&&(e.howMany+=t.howMany),e.splitPosition=t.sourcePosition.clone(),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]}return!e.splitPosition.isEqual(t.targetPosition)||"insertAtSource"!=n.baRelation&&"splitBefore"!=n.abRelation?(t.sourcePosition.isEqual(t.targetPosition)||(e.splitPosition.hasSameParentAs(t.sourcePosition)&&e.splitPosition.offset<=t.sourcePosition.offset&&(e.howMany-=t.howMany),e.splitPosition.hasSameParentAs(t.targetPosition)&&e.splitPosition.offset<t.targetPosition.offset&&(e.howMany+=t.howMany)),e.splitPosition.stickiness="toNone",e.splitPosition=e.splitPosition._getTransformedByMoveOperation(t),e.splitPosition.stickiness="toNext",e.graveyardPosition?e.insertionPosition=e.insertionPosition._getTransformedByMoveOperation(t):e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]):(e.howMany+=t.howMany,e.splitPosition=e.splitPosition._getTransformedByDeletion(t.sourcePosition,t.howMany),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e])})),tu(Ca,Ca,(function(e,t,n){if(e.splitPosition.isEqual(t.splitPosition)){if(!e.graveyardPosition&&!t.graveyardPosition)return[new 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to(t.insertionPosition.root,a);return[e,new ba(e.insertionPosition,1,s,0)]}return e.splitPosition.hasSameParentAs(t.splitPosition)&&e.splitPosition.offset<t.splitPosition.offset&&(e.howMany-=t.howMany),e.splitPosition=e.splitPosition._getTransformedBySplitOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]}));var fu=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e)))._stack=[],n._createdBatches=new WeakSet,n.refresh(),n}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this._stack.length>0}},{key:"addBatch",value:function(e){var t=this.editor.model.document.selection,n={ranges:t.hasOwnRange?Array.from(t.getRanges()):[],isBackward:t.isBackward};this._stack.push({batch:e,selection:n}),this.refresh()}},{key:"clearStack",value:function(){this._stack=[],this.refresh()}},{key:"_restoreSelection",value:function(e,t,n){var r=this.editor.model,i=r.document,o=[],a=!0,s=!1,l=void 0;try{for(var u,c=e[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=du(u.value,n).find((function(e){return e.start.root!=i.graveyard}));f&&o.push(f)}}catch(d){s=!0,l=d}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}o.length&&r.change((function(e){e.setSelection(o,{backward:t})}))}},{key:"_undo",value:function(e,t){var n=this.editor.model,r=n.document;this._createdBatches.add(t);var i=e.operations.slice().filter((function(e){return e.isDocumentOperation}));i.reverse();var o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f=c.baseVersion+1,d=Array.from(r.history.getOperations(f)),h=iu([c.getReversed()],d,{useRelations:!0,document:this.editor.model.document,padWithNoOps:!1,forceWeakRemove:!0}).operationsA,p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var 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e=0,n=!0,r=!1,i=void 0;try{for(var o,a=t.loaders[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s.uploadTotal&&(e+=s.uploadTotal)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}t.uploadTotal=e})),n}},{key:"destroyLoader",value:function(e){var t=this,n=e instanceof xu?e:this.getLoader(e);n._destroy(),this.loaders.remove(n),this._loadersMap.forEach((function(e,r){e===n&&t._loadersMap.delete(r)}))}},{key:"_updatePendingAction",value:function(){var e=this.editor.plugins.get(ku);if(this.loaders.length){if(!this._pendingAction){var t=this.editor.t,n=function(e){return"".concat(t("ay")," ").concat(parseInt(e),"%.")};this._pendingAction=e.add(n(this.uploadedPercent)),this._pendingAction.bind("message").to(this,"uploadedPercent",n)}}else e.remove(this._pendingAction),this._pendingAction=null}}],[{key:"pluginName",get:function(){return"FileRepository"}},{key:"requires",get:function(){return[ku]}}]),t}(xl);Yt(_u,wn);var xu=function(){function 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this._filePromiseWrapper?this._filePromiseWrapper.promise.then((function(t){return e._filePromiseWrapper?t:null})):Promise.resolve(null)}},{key:"data",get:function(){return this._reader.data}}]),e}();Yt(xu,wn);var Tu="ckCsrfToken",Cu=40,Su="abcdefghijklmnopqrstuvwxyz0123456789",Eu=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor.config.get("ckfinder.uploadUrl");t&&(this.editor.plugins.get(_u).createUploadAdapter=function(n){return new Au(n,t,e.editor.t)})}}],[{key:"requires",get:function(){return[_u]}},{key:"pluginName",get:function(){return"CKFinderUploadAdapter"}}]),t}(xl),Au=function(){function e(t,n,r){f(this,e),this.loader=t,this.url=n,this.t=r}return d(e,[{key:"upload",value:function(){var e=this;return this.loader.file.then((function(t){return new 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o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value.split("=");if(decodeURIComponent(s[0].trim().toLowerCase())===e)return decodeURIComponent(s[1])}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return null}(Tu);return n&&n.length==Cu||(n=function(e){var t="",n=new Uint8Array(e);window.crypto.getRandomValues(n);for(var r=0;r<n.length;r++){var i=Su.charAt(n[r]%Su.length);t+=Math.random()>.5?i.toUpperCase():i}return t}(Cu),e=Tu,t=n,document.cookie=encodeURIComponent(e)+"="+encodeURIComponent(t)+";path=/"),n}()),this.xhr.send(t)}}]),e}(),Pu=function(){function e(t,n,r){f(this,e);var i,o=null;"function"==typeof r?i=r:(o=t.commands.get(r),i=function(){t.execute(r)}),t.model.document.on("change",(function(e,r){if((!o||o.isEnabled)&&"transparent"!=r.type){var a=Array.from(t.model.document.differ.getChanges()),s=a[0];if(1==a.length&&"insert"===s.type&&"$text"==s.name&&1==s.length){var l=s.position.parent;if(l.is("paragraph")&&1===l.childCount){var u=n.exec(l.getChild(0).data);u&&t.model.enqueueChange((function(e){var t=e.createPositionAt(l,0),n=e.createPositionAt(l,u[0].length),r=new po(t,n);!1!==i({match:u})&&e.remove(r),r.detach()}))}}}}))}return d(e,null,[{key:"pluginName",get:function(){return"BlockAutoformatEditing"}}]),e}(),Mu=function(){function e(t,n,r){var i,o,a,s;f(this,e),n instanceof RegExp?i=n:a=n,"string"==typeof r?o=r:s=r,a=a||function(e){for(var t,n=[],r=[];null!==(t=i.exec(e))&&!(t&&t.length<4);){var o=t,a=o.index,s=o[1],l=o[2],u=o[3],c=s+l+u,f=[a+=t[0].length-c.length,a+s.length],d=[a+s.length+l.length,a+s.length+l.length+u.length];n.push(f),n.push(d),r.push([a+s.length,a+s.length+l.length])}return{remove:n,format:r}},s=s||function(e,n){var r=t.model.schema.getValidRanges(n,o),i=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(i=(l=u.next()).done);i=!0){var 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u=s.value;hc(n,t,{src:u})}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}))}}]),t}(Al),mc=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.t,r=e.conversion;e.editing.view.addObserver(Ku),t.register("image",{isObject:!0,isBlock:!0,allowWhere:"$block",allowAttributes:["alt","src","srcset"]}),r.for("dataDowncast").elementToElement({model:"image",view:function(e,t){return gc(t)}}),r.for("editingDowncast").elementToElement({model:"image",view:function(e,t){return function(e,t,n){return t.setCustomProperty("image",!0,e),ac(e,t,{label:function(){var t=e.getChild(0).getAttribute("alt");return t?"".concat(t," ").concat(n):n}})}(gc(t),t,n("i"))}}),r.for("downcast").add(Ju("src")).add(Ju("alt")).add(function(){return function(t){t.on("attribute:srcset:image",e)};function e(e,t,n){if(n.consumable.consume(t.item,e.name)){var r=n.writer,i=n.mapper.toViewElement(t.item).getChild(0);if(null===t.attributeNewValue){var o=t.attributeOldValue;o.data&&(r.removeAttribute("srcset",i),r.removeAttribute("sizes",i),o.width&&r.removeAttribute("width",i))}else{var a=t.attributeNewValue;a.data&&(r.setAttribute("srcset",a.data,i),r.setAttribute("sizes","100vw",i),a.width&&r.setAttribute("width",a.width,i))}}}}()),r.for("upcast").elementToElement({view:{name:"img",attributes:{src:!0}},model:function(e,t){return t.createElement("image",{src:e.getAttribute("src")})}}).attributeToAttribute({view:{name:"img",key:"alt"},model:"alt"}).attributeToAttribute({view:{name:"img",key:"srcset"},model:{key:"srcset",value:function(e){var t={data:e.getAttribute("srcset")};return e.hasAttribute("width")&&(t.width=e.getAttribute("width")),t}}}).add(function(){return function(t){t.on("element:figure",e)};function e(e,t,n){if(n.consumable.test(t.viewItem,{name:!0,classes:"image"})){var r=Array.from(t.viewItem.getChildren()).find((function(e){return e.is("img")}));if(r&&r.hasAttribute("src")&&n.consumable.test(r,{name:!0})){var i=n.convertItem(r,t.modelCursor),o=Uu(i.modelRange.getItems());o&&(n.convertChildren(t.viewItem,n.writer.createPositionAt(o,0)),t.modelRange=i.modelRange,t.modelCursor=i.modelCursor)}}}}()),e.commands.add("imageInsert",new vc(e))}}],[{key:"pluginName",get:function(){return"ImageEditing"}}]),t}(xl);function gc(e){var t=e.createEmptyElement("img"),n=e.createContainerElement("figure",{class:"image"});return e.insert(e.createPositionAt(n,0),t),n}function yc(e,t,n){return n.createRange(bc(e,t,!0,n),bc(e,t,!1,n))}function bc(e,t,n,r){for(var i=e.textNode||(n?e.nodeBefore:e.nodeAfter),o=null;i&&i.getAttribute("linkHref")==t;)o=i,i=n?i.previousSibling:i.nextSibling;return o?r.createPositionAt(o,n?"before":"after"):e}var kc=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).manualDecorators=new Fn,n}return v(t,e),d(t,[{key:"restoreManualDecoratorStates",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.manualDecorators[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;o.value=this._getDecoratorStateFromModel(o.id)}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"refresh",value:function(){var e=this.editor.model,t=e.document;this.value=t.selection.getAttribute("linkHref");var n=!0,r=!1,i=void 0;try{for(var o,a=this.manualDecorators[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s.value=this._getDecoratorStateFromModel(s.id)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.isEnabled=e.schema.checkAttributeInSelection(t.selection,"linkHref")}},{key:"execute",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=this.editor.model,r=n.document.selection,i=[],o=[];for(var a in t)t[a]?i.push(a):o.push(a);n.change((function(t){if(r.isCollapsed){var a=r.getFirstPosition();if(r.hasAttribute("linkHref")){var s=yc(a,r.getAttribute("linkHref"),n);t.setAttribute("linkHref",e,s),i.forEach((function(e){t.setAttribute(e,!0,s)})),o.forEach((function(e){t.removeAttribute(e,s)})),t.setSelection(s)}else if(""!==e){var l=$i(r.getAttributes());l.set("linkHref",e),i.forEach((function(e){l.set(e,!0)}));var u=t.createText(e,l);n.insertContent(u,a),t.setSelection(t.createRangeOn(u))}}else{var c=n.schema.getValidRanges(r.getRanges(),"linkHref"),f=!0,d=!1,h=void 0;try{for(var p,v=function(){var n=p.value;t.setAttribute("linkHref",e,n),i.forEach((function(e){t.setAttribute(e,!0,n)})),o.forEach((function(e){t.removeAttribute(e,n)}))},m=c[Symbol.iterator]();!(f=(p=m.next()).done);f=!0)v()}catch(g){d=!0,h=g}finally{try{f||null==m.return||m.return()}finally{if(d)throw h}}}}))}},{key:"_getDecoratorStateFromModel",value:function(e){return this.editor.model.document.selection.getAttribute(e)||!1}}]),t}(Al),wc=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this.editor.model.document.selection.hasAttribute("linkHref")}},{key:"execute",value:function(){var e=this.editor,t=this.editor.model,n=t.document.selection,r=e.commands.get("link");t.change((function(e){var i=n.isCollapsed?[yc(n.getFirstPosition(),n.getAttribute("linkHref"),t)]:n.getRanges(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if(e.removeAttribute("linkHref",c),r){var f=!0,d=!1,h=void 0;try{for(var p,v=r.manualDecorators[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;e.removeAttribute(m.id,c)}}catch(g){d=!0,h=g}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}}}catch(g){a=!0,s=g}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al),_c=function(e,t,n){var r=e.length;return n=void 0===n?r:n,!t&&n>=r?e:function(e,t,n){var r=-1,i=e.length;t<0&&(t=-t>i?0:i+t),(n=n>i?i:n)<0&&(n+=i),i=t>n?0:n-t>>>0,t>>>=0;for(var o=Array(i);++r<i;)o[r]=e[r+t];return o}(e,t,n)},xc=RegExp("[\\u200d\\ud800-\\udfff\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff\\ufe0e\\ufe0f]"),Tc=function(e){return xc.test(e)},Cc="[\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff]",Sc="\\ud83c[\\udffb-\\udfff]",Ec="[^\\ud800-\\udfff]",Ac="(?:\\ud83c[\\udde6-\\uddff]){2}",Pc="[\\ud800-\\udbff][\\udc00-\\udfff]",Mc="(?:"+Cc+"|"+Sc+")?",Oc="[\\ufe0e\\ufe0f]?"+Mc+"(?:\\u200d(?:"+[Ec,Ac,Pc].join("|")+")[\\ufe0e\\ufe0f]?"+Mc+")*",Nc="(?:"+[Ec+Cc+"?",Cc,Ac,Pc,"[\\ud800-\\udfff]"].join("|")+")",Ic=RegExp(Sc+"(?="+Sc+")|"+Nc+Oc,"g"),Dc=function(e){return Tc(e)?function(e){return e.match(Ic)||[]}(e):function(e){return e.split("")}(e)},Rc=b?b.prototype:void 0,jc=Rc?Rc.toString:void 0,Lc=function e(t){if("string"==typeof t)return t;if(xe(t))return function(e,t){for(var n=-1,r=null==e?0:e.length,i=Array(r);++n<r;)i[n]=t(e[n],n,e);return i}(t,e)+"";if(vi(t))return jc?jc.call(t):"";var n=t+"";return"0"==n&&1/t==-1/0?"-0":n},Fc=function(e){e=function(e){return null==e?"":Lc(e)}(e);var t=Tc(e)?Dc(e):void 0,n=t?t[0]:e.charAt(0),r=t?_c(t,1).join(""):e.slice(1);return n.toUpperCase()+r},zc=/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205f\u3000]/g,Vc=/^(?:(?:https?|ftps?|mailto):|[^a-z]|[a-z+.-]+(?:[^a-z+.:-]|$))/i;function Bc(e,t){var n=t.createAttributeElement("a",{href:e},{priority:5});return t.setCustomProperty("link",!0,n),n}function Uc(e){return function(e){return e.replace(zc,"").match(Vc)}(e=String(e))?e:"#"}var Hc=function(){function e(){f(this,e),this._definitions=new Set}return d(e,[{key:"add",value:function(e){var t=this;Array.isArray(e)?e.forEach((function(e){return t._definitions.add(e)})):this._definitions.add(e)}},{key:"getDispatcher",value:function(){var e=this;return function(t){t.on("attribute:linkHref",(function(t,n,r){if(r.consumable.test(n.item,"attribute:linkHref")){var i=r.writer,o=i.document.selection,a=!0,s=!1,l=void 0;try{for(var u,c=e._definitions[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value,d=i.createAttributeElement("a",f.attributes,{priority:5});i.setCustomProperty("link",!0,d),f.callback(n.attributeNewValue)?n.item.is("selection")?i.wrap(o.getFirstRange(),d):i.wrap(r.mapper.toViewRange(n.range),d):i.unwrap(r.mapper.toViewRange(n.range),d)}}catch(h){s=!0,l=h}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}}),{priority:"high"})}}},{key:"length",get:function(){return this._definitions.size}}]),e}(),qc=function e(t){var n=t.id,r=t.label,i=t.attributes;f(this,e),this.id=n,this.set("value"),this.label=r,this.attributes=i};Yt(qc,wn);var Wc=function(){function e(t,n,r){var i=this;f(this,e),this.model=t,this.attribute=r,this._modelSelection=t.document.selection,this._overrideUid=null,this._isNextGravityRestorationSkipped=!1,n.listenTo(this._modelSelection,"change:range",(function(e,t){i._isNextGravityRestorationSkipped?i._isNextGravityRestorationSkipped=!1:i._isGravityOverridden&&(!t.directChange&&Yc(i._modelSelection.getFirstPosition(),r)||i._restoreGravity())}))}return d(e,[{key:"handleForwardMovement",value:function(e,t){var n=this.attribute;if(!(this._isGravityOverridden||e.isAtStart&&this._hasSelectionAttribute))return Qc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._removeSelectionAttribute(),!0):$c(e,n)?(this._preventCaretMovement(t),this._overrideGravity(),!0):Gc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._overrideGravity(),!0):void 0}},{key:"handleBackwardMovement",value:function(e,t){var n=this.attribute;return this._isGravityOverridden?Qc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._restoreGravity(),this._removeSelectionAttribute(),!0):(this._preventCaretMovement(t),this._restoreGravity(),e.isAtStart&&this._removeSelectionAttribute(),!0):Qc(e,n)&&!this._hasSelectionAttribute?(this._preventCaretMovement(t),this._setSelectionAttributeFromTheNodeBefore(e),!0):e.isAtEnd&&Gc(e,n)?this._hasSelectionAttribute?void(Kc(e,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity())):(this._preventCaretMovement(t),this._setSelectionAttributeFromTheNodeBefore(e),!0):e.isAtStart?this._hasSelectionAttribute?(this._removeSelectionAttribute(),this._preventCaretMovement(t),!0):void 0:void(Kc(e,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity()))}},{key:"_overrideGravity",value:function(){this._overrideUid=this.model.change((function(e){return e.overrideSelectionGravity()}))}},{key:"_restoreGravity",value:function(){var e=this;this.model.change((function(t){t.restoreSelectionGravity(e._overrideUid),e._overrideUid=null}))}},{key:"_preventCaretMovement",value:function(e){e.preventDefault()}},{key:"_removeSelectionAttribute",value:function(){var e=this;this.model.change((function(t){t.removeSelectionAttribute(e.attribute)}))}},{key:"_setSelectionAttributeFromTheNodeBefore",value:function(e){var t=this,n=this.attribute;this.model.change((function(r){r.setSelectionAttribute(t.attribute,e.nodeBefore.getAttribute(n))}))}},{key:"_skipNextAutomaticGravityRestoration",value:function(){this._isNextGravityRestorationSkipped=!0}},{key:"_isGravityOverridden",get:function(){return!!this._overrideUid}},{key:"_hasSelectionAttribute",get:function(){return this._modelSelection.hasAttribute(this.attribute)}}]),e}();function Yc(e,t){return $c(e,t)||Gc(e,t)}function $c(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t);return!!r&&r.hasAttribute(t)&&(!i||n.getAttribute(t)!==r.getAttribute(t))}function Gc(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t),o=!!r&&r.hasAttribute(t);return i&&(!o||n.getAttribute(t)!==r.getAttribute(t))}function Qc(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t);if(r&&r.hasAttribute(t)&&i)return r.getAttribute(t)!==n.getAttribute(t)}function Kc(e,t){return Yc(e.getShiftedBy(-1),t)}n(45);var Jc="ck-link_selected",Xc="automatic",Zc=/^(https?:)?\/\//,ef=function(e){function t(e){var n;return f(this,t),n=h(this,p(t).call(this,e)),e.config.define("link",{addTargetToExternalLinks:!1}),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"LinkEditing"}}]),d(t,[{key:"init",value:function(){var e=this.editor,t=e.locale;e.model.schema.extend("$text",{allowAttributes:"linkHref"}),e.conversion.for("dataDowncast").attributeToElement({model:"linkHref",view:Bc}),e.conversion.for("editingDowncast").attributeToElement({model:"linkHref",view:function(e,t){return Bc(Uc(e),t)}}),e.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:{href:!0}},model:{key:"linkHref",value:function(e){return e.getAttribute("href")}}}),e.commands.add("link",new kc(e)),e.commands.add("unlink",new wc(e));var n=function(e,t){var n={"Open in a new tab":e("az"),Downloadable:e("ba")};return t.forEach((function(e){return e.label&&n[e.label]&&(e.label=n[e.label]),e})),t}(e.t,function(e){var t=[];if(e)for(var n=0,r=Object.entries(e);n<r.length;n++){var i=r[n],o=c(i,2),a=o[0],s=o[1],l=Object.assign({},s,{id:"link".concat(Fc(a))});t.push(l)}return t}(e.config.get("link.decorators")));this._enableAutomaticDecorators(n.filter((function(e){return e.mode===Xc}))),this._enableManualDecorators(n.filter((function(e){return"manual"===e.mode}))),function(e){var t=e.view,n=e.model,r=e.emitter,i=e.locale,o=new Wc(n,r,e.attribute),a=n.document.selection;r.listenTo(t.document,"keydown",(function(e,t){if(a.isCollapsed&&!(t.shiftKey||t.altKey||t.ctrlKey)){var n=t.keyCode==Kn.arrowright,r=t.keyCode==Kn.arrowleft;if(n||r){var s=a.getFirstPosition(),l=i.contentLanguageDirection;("ltr"===l&&n||"rtl"===l&&r?o.handleForwardMovement(s,t):o.handleBackwardMovement(s,t))&&e.stop()}}}),{priority:jt.get("high")+1})}({view:e.editing.view,model:e.model,emitter:this,attribute:"linkHref",locale:t}),this._setupLinkHighlight()}},{key:"_enableAutomaticDecorators",value:function(e){var t=this.editor,n=new Hc;t.config.get("link.addTargetToExternalLinks")&&n.add({id:"linkIsExternal",mode:Xc,callback:function(e){return Zc.test(e)},attributes:{target:"_blank",rel:"noopener noreferrer"}}),n.add(e),n.length&&t.conversion.for("downcast").add(n.getDispatcher())}},{key:"_enableManualDecorators",value:function(e){if(e.length){var t=this.editor,n=t.commands.get("link").manualDecorators;e.forEach((function(e){t.model.schema.extend("$text",{allowAttributes:e.id}),n.add(new qc(e)),t.conversion.for("downcast").attributeToElement({model:e.id,view:function(t,r){if(t){var i=n.get(e.id).attributes,o=r.createAttributeElement("a",i,{priority:5});return r.setCustomProperty("link",!0,o),o}}}),t.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:n.get(e.id).attributes},model:{key:e.id}})}))}}},{key:"_setupLinkHighlight",value:function(){var e=this.editor,t=e.editing.view,n=new Set;t.document.registerPostFixer((function(t){var r=e.model.document.selection,i=!1;if(r.hasAttribute("linkHref")){var o=yc(r.getFirstPosition(),r.getAttribute("linkHref"),e.model),a=e.editing.mapper.toViewRange(o),s=!0,l=!1,u=void 0;try{for(var c,f=a.getItems()[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;d.is("a")&&!d.hasClass(Jc)&&(t.addClass(Jc,d),n.add(d),i=!0)}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}}return i})),e.conversion.for("editingDowncast").add((function(e){function r(){t.change((function(e){var t=!0,r=!1,i=void 0;try{for(var o,a=n.values()[Symbol.iterator]();!(t=(o=a.next()).done);t=!0){var s=o.value;e.removeClass(Jc,s),n.delete(s)}}catch(l){r=!0,i=l}finally{try{t||null==a.return||a.return()}finally{if(r)throw i}}}))}e.on("insert",r,{priority:"highest"}),e.on("remove",r,{priority:"highest"}),e.on("attribute",r,{priority:"highest"}),e.on("selection",r,{priority:"highest"})}))}}]),t}(xl),tf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this.on("show:warning",(function(e,t){window.alert(t.message)}),{priority:"lowest"})}},{key:"showSuccess",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"success",namespace:t.namespace,title:t.title})}},{key:"showInfo",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"info",namespace:t.namespace,title:t.title})}},{key:"showWarning",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"warning",namespace:t.namespace,title:t.title})}},{key:"_showNotification",value:function(e){var t="show:".concat(e.type)+(e.namespace?":".concat(e.namespace):"");this.fire(t,{message:e.message,type:e.type,title:e.title||""})}}],[{key:"pluginName",get:function(){return"Notification"}}]),t}(xl),nf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).stopListening(n.editor.model.document,"change"),n.listenTo(n.editor.model.document,"change",(function(){return n.refresh()}),{priority:"low"}),n}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.commands.get("imageInsert"),t=this.editor.commands.get("link");this.isEnabled=e.isEnabled||t.isEnabled}},{key:"execute",value:function(){var e=this.editor,t=this.editor.config.get("ckfinder.openerMethod")||"modal";if("popup"!=t&&"modal"!=t)throw new It.b('ckfinder-unknown-openerMethod: The openerMethod config option must by "popup" or "modal".',e);var n=this.editor.config.get("ckfinder.options")||{};n.chooseFiles=!0;var r=n.onInit;n.language||(n.language=e.locale.uiLanguage),n.onInit=function(t){r&&r(t),t.on("files:choose",(function(n){var r=n.data.files.toArray(),i=r.filter((function(e){return!e.isImage()})),o=r.filter((function(e){return e.isImage()})),a=!0,s=!1,l=void 0;try{for(var u,c=i[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;e.execute("link",f.getUrl())}}catch(k){s=!0,l=k}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}var d=[],h=!0,p=!1,v=void 0;try{for(var m,g=o[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=y.getUrl();d.push(b||t.request("file:getProxyUrl",{file:y}))}}catch(k){p=!0,v=k}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}d.length&&rf(e,d)})),t.on("file:choose:resizedImage",(function(t){var n=t.data.resizedUrl;if(n)rf(e,[n]);else{var r=e.plugins.get("Notification"),i=e.locale.t;r.showWarning(i("at"),{title:i("au"),namespace:"ckfinder"})}}))},window.CKFinder[t](n)}}]),t}(Al);function rf(e,t){if(e.commands.get("imageInsert").isEnabled)e.execute("imageInsert",{source:t});else{var n=e.plugins.get("Notification"),r=e.locale.t;n.showWarning(r("av"),{title:r("aw"),namespace:"ckfinder"})}}var of=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.commands.add("ckfinder",new nf(e))}}],[{key:"pluginName",get:function(){return"CKFinderEditing"}},{key:"requires",get:function(){return[tf,mc,ef]}}]),t}(xl),af=/^data:(\S*?);base64,/,sf=function(){function e(t,n,r){if(f(this,e),!t)throw new It.b("fileuploader-missing-file: File must be provided as the first argument",null);if(!n)throw new It.b("fileuploader-missing-token: Token must be provided as the second argument.",null);if(!r)throw new It.b("fileuploader-missing-api-address: Api address must be provided as the third argument.",null);this.file=function(e){if("string"!=typeof e)return!1;var t=e.match(af);return!(!t||!t.length)}(t)?function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:512;try{for(var n=e.match(af)[1],r=atob(e.replace(af,"")),i=[],o=0;o<r.length;o+=t){for(var a=r.slice(o,o+t),s=new Array(a.length),l=0;l<a.length;l++)s[l]=a.charCodeAt(l);i.push(new Uint8Array(s))}return new Blob(i,{type:n})}catch(e){throw new It.b("fileuploader-decoding-image-data-error: Problem with decoding Base64 image data.",null)}}(t):t,this._token=n,this._apiAddress=r}return d(e,[{key:"onProgress",value:function(e){return this.on("progress",(function(t,n){return e(n)})),this}},{key:"onError",value:function(e){return this.once("error",(function(t,n){return e(n)})),this}},{key:"abort",value:function(){this.xhr.abort()}},{key:"send",value:function(){return this._prepareRequest(),this._attachXHRListeners(),this._sendRequest()}},{key:"_prepareRequest",value:function(){var e=new XMLHttpRequest;e.open("POST",this._apiAddress),e.setRequestHeader("Authorization",this._token.value),e.responseType="json",this.xhr=e}},{key:"_attachXHRListeners",value:function(){var e=this,t=this,n=this.xhr;function r(e){return function(){return t.fire("error",e)}}n.addEventListener("error",r("Network Error")),n.addEventListener("abort",r("Abort")),n.upload&&n.upload.addEventListener("progress",(function(t){t.lengthComputable&&e.fire("progress",{total:t.total,uploaded:t.loaded})})),n.addEventListener("load",(function(){var t=n.status,r=n.response;if(t<200||t>299)return e.fire("error",r.message||r.error)}))}},{key:"_sendRequest",value:function(){var e=this,t=new FormData,n=this.xhr;return t.append("file",this.file),new Promise((function(r,i){n.addEventListener("load",(function(){var t=n.status,o=n.response;return t<200||t>299?o.message?i(new It.b("fileuploader-uploading-data-failed: Uploading file failed.",e,{message:o.message})):i(o.error):r(o)})),n.addEventListener("error",(function(){return i(new Error("Network Error"))})),n.addEventListener("abort",(function(){return i(new Error("Abort"))})),n.send(t)}))}}]),e}();Yt(sf,zt);var lf={refreshInterval:36e5,autoRefresh:!0},uf=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:lf;if(f(this,e),!t)throw new It.b("token-missing-token-url: A `tokenUrl` must be provided as the first constructor argument.",this);this.set("value",n.initValue),this._refresh="function"==typeof t?t:function(){return function(e){return new Promise((function(t,n){var r=new XMLHttpRequest;r.open("GET",e),r.addEventListener("load",(function(){var e=r.status,i=r.response;return e<200||e>299?n(new It.b("token-cannot-download-new-token: Cannot download new token from the provided url.",null)):t(i)})),r.addEventListener("error",(function(){return n(new Error("Network Error"))})),r.addEventListener("abort",(function(){return n(new Error("Abort"))})),r.send()}))}(t)},this._options=Object.assign({},lf,n)}return d(e,[{key:"init",value:function(){var e=this;return new Promise((function(t,n){e._options.autoRefresh&&e._startRefreshing(),e.value?t(e):e._refreshToken().then(t).catch(n)}))}},{key:"_refreshToken",value:function(){var e=this;return this._refresh().then((function(t){return e.set("value",t)})).then((function(){return e}))}},{key:"destroy",value:function(){this._stopRefreshing()}},{key:"_startRefreshing",value:function(){var e=this;this._refreshInterval=setInterval((function(){return e._refreshToken()}),this._options.refreshInterval)}},{key:"_stopRefreshing",value:function(){clearInterval(this._refreshInterval)}}],[{key:"create",value:function(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:lf;return new e(t,n).init()}}]),e}();Yt(uf,wn);var cf=uf,ff=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor.config.get("cloudServices")||{};for(var n in e)this[n]=e[n];if(this.tokenUrl)return this.token=new t.Token(this.tokenUrl),this.token.init();this.token=null}}],[{key:"pluginName",get:function(){return"CloudServices"}}]),t}(xl);ff.Token=cf;var df=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,n=this.editor,r=n.plugins.get(ff),i=r.token,o=r.uploadUrl;i&&(this._uploadGateway=new t._UploadGateway(i,o),n.plugins.get(_u).createUploadAdapter=function(t){return new hf(e._uploadGateway,t)})}}],[{key:"requires",get:function(){return[_u,ff]}}]),t}(xl),hf=function(){function e(t,n){f(this,e),this.uploadGateway=t,this.loader=n}return d(e,[{key:"upload",value:function(){var e=this;return this.loader.file.then((function(t){return e.fileUploader=e.uploadGateway.upload(t),e.fileUploader.on("progress",(function(t,n){e.loader.uploadTotal=n.total,e.loader.uploaded=n.uploaded})),e.fileUploader.send()}))}},{key:"abort",value:function(){this.fileUploader.abort()}}]),e}();df._UploadGateway=function(){function e(t,n){if(f(this,e),!t)throw new It.b("uploadgateway-missing-token: Token must be provided.",null);if(!n)throw new It.b("uploadgateway-missing-api-address: Api address must be provided.",null);this._token=t,this._apiAddress=n}return d(e,[{key:"upload",value:function(e){return new sf(e,this._token,this._apiAddress)}}]),e}();var pf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).domEventType="mousedown",n}return v(t,e),d(t,[{key:"onDomEvent",value:function(e){this.fire(e.type,e)}}]),t}(di);n(47);var vf=Xn("Ctrl+A"),mf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor.editing.view,n=t.document;this._previouslySelected=new Set,this.editor.editing.downcastDispatcher.on("selection",(function(t,n,r){e._clearPreviouslySelectedWidgets(r.writer);var i=r.writer,o=i.document.selection,a=o.getSelectedElement(),s=null,l=!0,u=!1,c=void 0;try{for(var f,d=o.getRanges()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value,p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var b=g.value.item;oc(b)&&!gf(b,s)&&(i.addClass(ic,b),e._previouslySelected.add(b),s=b,b==a&&i.setSelection(o.getRanges(),{fake:!0,label:sc(a)}))}}catch(k){v=!0,m=k}finally{try{p||null==y.return||y.return()}finally{if(v)throw m}}}}catch(k){u=!0,c=k}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}),{priority:"low"}),t.addObserver(pf),this.listenTo(n,"mousedown",(function(){return e._onMousedown.apply(e,arguments)})),this.listenTo(n,"keydown",(function(){return e._onKeydown.apply(e,arguments)}),{priority:"high"}),this.listenTo(n,"delete",(function(t,n){e._handleDelete("forward"==n.direction)&&(n.preventDefault(),t.stop())}),{priority:"high"})}},{key:"_onMousedown",value:function(e,t){var n=this.editor,r=n.editing.view,i=r.document,o=t.target;if(function(e){for(;e;){if(e.is("editableElement")&&!e.is("rootElement"))return!0;if(oc(e))return!1;e=e.parent}return!1}(o)){if($n.isSafari&&t.domEvent.detail>=3){var a=n.editing.mapper.toModelElement(o);this.editor.model.change((function(e){t.preventDefault(),e.setSelection(a,"in")}))}}else if(oc(o)||(o=o.findAncestor(oc))){t.preventDefault(),i.isFocused||r.focus();var s=n.editing.mapper.toModelElement(o);this._setSelectionOverElement(s)}}},{key:"_onKeydown",value:function(e,t){var n=t.keyCode,r="ltr"===this.editor.locale.contentLanguageDirection,i=n==Kn.arrowdown||n==Kn[r?"arrowright":"arrowleft"],o=!1;!function(e){return e==Kn.arrowright||e==Kn.arrowleft||e==Kn.arrowup||e==Kn.arrowdown}(n)?function(e){return Jn(e)==vf}(t)?o=this._selectAllNestedEditableContent()||this._selectAllContent():n===Kn.enter&&(o=this._handleEnterKey(t.shiftKey)):o=this._handleArrowKeys(i),o&&(t.preventDefault(),e.stop())}},{key:"_handleDelete",value:function(e){var t=this;if(!this.editor.isReadOnly){var n=this.editor.model.document.selection;if(n.isCollapsed){var r=this._getObjectElementNextToSelection(e);return r?(this.editor.model.change((function(e){for(var i=n.anchor.parent;i.isEmpty;){var o=i;i=o.parent,e.remove(o)}t._setSelectionOverElement(r)})),!0):void 0}}}},{key:"_handleArrowKeys",value:function(e){var t=this.editor.model,n=t.schema,r=t.document.selection,i=r.getSelectedElement();if(i&&n.isObject(i)){var o=e?r.getLastPosition():r.getFirstPosition(),a=n.getNearestSelectionRange(o,e?"forward":"backward");return a&&t.change((function(e){e.setSelection(a)})),!0}if(r.isCollapsed){var s=this._getObjectElementNextToSelection(e);return s&&n.isObject(s)?(this._setSelectionOverElement(s),!0):void 0}}},{key:"_handleEnterKey",value:function(e){var t,n,r=this.editor.model,i=r.document.selection.getSelectedElement();if(t=i,n=r.schema,t&&n.isObject(t)&&!n.isInline(t))return r.change((function(t){var n=t.createPositionAt(i,e?"before":"after"),o=t.createElement("paragraph");if(r.schema.isBlock(i.parent)){var a=r.schema.findAllowedParent(n,o);n=t.split(n,a).position}t.insert(o,n),t.setSelection(o,"in")})),!0}},{key:"_selectAllNestedEditableContent",value:function(){var e=this.editor.model,t=e.document.selection,n=e.schema.getLimitElement(t);return t.getFirstRange().root!=n&&(e.change((function(e){e.setSelection(e.createRangeIn(n))})),!0)}},{key:"_selectAllContent",value:function(){var e=this.editor.model,t=this.editor.editing,n=t.view.document.selection.getSelectedElement();if(n&&oc(n)){var r=t.mapper.toModelElement(n.parent);return e.change((function(e){e.setSelection(e.createRangeIn(r))})),!0}return!1}},{key:"_setSelectionOverElement",value:function(e){this.editor.model.change((function(t){t.setSelection(t.createRangeOn(e))}))}},{key:"_getObjectElementNextToSelection",value:function(e){var t=this.editor.model,n=t.schema,r=t.document.selection,i=t.createSelection(r);t.modifySelection(i,{direction:e?"forward":"backward"});var o=e?i.focus.nodeBefore:i.focus.nodeAfter;return o&&n.isObject(o)?o:null}},{key:"_clearPreviouslySelectedWidgets",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._previouslySelected[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e.removeClass(ic,a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._previouslySelected.clear()}}],[{key:"pluginName",get:function(){return"Widget"}}]),t}(xl);function gf(e,t){return!!t&&Array.from(e.getAncestors()).includes(t)}var yf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.model.document.selection.getSelectedElement();this.isEnabled=dc(e),dc(e)&&e.hasAttribute("alt")?this.value=e.getAttribute("alt"):this.value=!1}},{key:"execute",value:function(e){var t=this.editor.model,n=t.document.selection.getSelectedElement();t.change((function(t){t.setAttribute("alt",e.newValue,n)}))}}]),t}(Al),bf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this.editor.commands.add("imageTextAlternative",new yf(this.editor))}}],[{key:"pluginName",get:function(){return"ImageTextAlternativeEditing"}}]),t}(xl);n(49);var kf=function(e){function t(e,n){var r;f(this,t),r=h(this,p(t).call(this,e));var i="ck-input-".concat(Rt()),a="ck-status-".concat(Rt());r.set("label"),r.set("value"),r.set("isReadOnly",!1),r.set("errorText",null),r.set("infoText",null),r.labelView=r._createLabelView(i),r.inputView=r._createInputView(n,i,a),r.statusView=r._createStatusView(a),r.bind("_statusText").to(o(r),"errorText",o(r),"infoText",(function(e,t){return e||t}));var s=r.bindTemplate;return r.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input",s.if("isReadOnly","ck-disabled")]},children:[r.labelView,r.inputView,r.statusView]}),r}return v(t,e),d(t,[{key:"_createLabelView",value:function(e){var t=new Ws(this.locale);return t.for=e,t.bind("text").to(this,"label"),t}},{key:"_createInputView",value:function(e,t,n){var r=this,i=new e(this.locale,n);return i.id=t,i.ariaDescribedById=n,i.bind("value").to(this),i.bind("isReadOnly").to(this),i.bind("hasError").to(this,"errorText",(function(e){return!!e})),i.on("input",(function(){r.errorText=null})),i}},{key:"_createStatusView",value:function(e){var t=new Hs(this.locale),n=this.bindTemplate;return t.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input__status",n.if("errorText","ck-labeled-input__status_error"),n.if("_statusText","ck-hidden",(function(e){return!e}))],id:e,role:n.if("errorText","alert")},children:[{text:n.to("_statusText")}]}),t}},{key:"select",value:function(){this.inputView.select()}},{key:"focus",value:function(){this.inputView.focus()}}]),t}(Hs);n(51);var wf=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("value"),n.set("id"),n.set("placeholder"),n.set("isReadOnly",!1),n.set("hasError",!1),n.set("ariaDescribedById");var r=n.bindTemplate;return n.setTemplate({tag:"input",attributes:{type:"text",class:["ck","ck-input","ck-input-text",r.if("hasError","ck-error")],id:r.to("id"),placeholder:r.to("placeholder"),readonly:r.to("isReadOnly"),"aria-invalid":r.if("hasError",!0),"aria-describedby":r.to("ariaDescribedById")},on:{input:r.to("input")}}),n}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=function(t){e.element.value=t||0===t?t:""};n(this.value),this.on("change:value",(function(e,t,r){n(r)}))}},{key:"select",value:function(){this.element.select()}},{key:"focus",value:function(){this.element.focus()}}]),t}(Hs);function _f(e){var t=e.view;t.listenTo(t.element,"submit",(function(e,n){n.preventDefault(),t.fire("submit")}),{useCapture:!0})}var xf='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M6.972 16.615a.997.997 0 0 1-.744-.292l-4.596-4.596a1 1 0 1 1 1.414-1.414l3.926 3.926 9.937-9.937a1 1 0 0 1 1.414 1.415L7.717 16.323a.997.997 0 0 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tab",focusNext:"tab"}}),n.setTemplate({tag:"form",attributes:{class:["ck","ck-text-alternative-form"],tabindex:"-1"},children:[n.labeledInput,n.saveButtonView,n.cancelButtonView]}),n}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this),this.keystrokes.listenTo(this.element),_f({view:this}),[this.labeledInput,this.saveButtonView,this.cancelButtonView].forEach((function(t){e._focusables.add(t),e.focusTracker.add(t.element)}))}},{key:"_createButton",value:function(e,t,n,r){var i=new ll(this.locale);return i.set({label:e,icon:t,tooltip:!0}),i.extendTemplate({attributes:{class:n}}),r&&i.delegate("execute").to(this,r),i}},{key:"_createLabeledInputView",value:function(){var e=this.locale.t,t=new kf(this.locale,wf);return t.label=e("cd"),t.inputView.placeholder=e("cd"),t}}]),t}(Hs);n(55);var Sf=Gs("px"),Ef=Dr.document.body,Af=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate;return n.set("top",0),n.set("left",0),n.set("position","arrow_nw"),n.set("isVisible",!1),n.set("withArrow",!0),n.set("class"),n.content=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-panel",r.to("position",(function(e){return"ck-balloon-panel_".concat(e)})),r.if("isVisible","ck-balloon-panel_visible"),r.if("withArrow","ck-balloon-panel_with-arrow"),r.to("class")],style:{top:r.to("top",Sf),left:r.to("left",Sf)}},children:n.content}),n}return v(t,e),d(t,[{key:"show",value:function(){this.isVisible=!0}},{key:"hide",value:function(){this.isVisible=!1}},{key:"attachTo",value:function(e){this.show();var n=t.defaultPositions,r=Object.assign({},{element:this.element,positions:[n.southArrowNorth,n.southArrowNorthWest,n.southArrowNorthEast,n.northArrowSouth,n.northArrowSouthWest,n.northArrowSouthEast],limiter:Ef,fitInViewport:!0},e),i=t._getOptimalPosition(r),o=parseInt(i.left),a=parseInt(i.top),s=i.name;Object.assign(this,{top:a,left:o,position:s})}},{key:"pin",value:function(e){var t=this;this.unpin(),this._pinWhenIsVisibleCallback=function(){t.isVisible?t._startPinning(e):t._stopPinning()},this._startPinning(e),this.listenTo(this,"change:isVisible",this._pinWhenIsVisibleCallback)}},{key:"unpin",value:function(){this._pinWhenIsVisibleCallback&&(this._stopPinning(),this.stopListening(this,"change:isVisible",this._pinWhenIsVisibleCallback),this._pinWhenIsVisibleCallback=null,this.hide())}},{key:"_startPinning",value:function(e){var t=this;this.attachTo(e);var n=Pf(e.target),r=e.limiter?Pf(e.limiter):Ef;this.listenTo(Dr.document,"scroll",(function(i,o){var 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Nf='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.463 5.187a.888.888 0 1 1 1.254 1.255L9.16 10l3.557 3.557a.888.888 0 1 1-1.254 1.255L7.26 10.61a.888.888 0 0 1 .16-1.382l4.043-4.042z" /></svg>\n',If='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M8.537 14.813a.888.888 0 1 1-1.254-1.255L10.84 10 7.283 6.442a.888.888 0 1 1 1.254-1.255L12.74 9.39a.888.888 0 0 1-.16 1.382l-4.043 4.042z"/></svg>\n';n(57),n(59);var Df=Gs("px"),Rf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).positionLimiter=function(){var e=n.editor.editing.view,t=e.document.selection.editableElement;return t?e.domConverter.mapViewToDom(t.root):null},n.set("visibleView",null),n.view=new Af(e.locale),e.ui.view.body.add(n.view),e.ui.focusTracker.add(n.view.element),n._viewToStack=new Map,n._idToStack=new Map,n.set("_numberOfStacks",0),n.set("_singleViewMode",!1),n._rotatorView=n._createRotatorView(),n._fakePanelsView=n._createFakePanelsView(),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"ContextualBalloon"}}]),d(t,[{key:"hasView",value:function(e){return Array.from(this._viewToStack.keys()).includes(e)}},{key:"add",value:function(e){if(this.hasView(e.view))throw new It.b("contextualballoon-add-view-exist: Cannot add configuration of the same view twice.",[this,e]);var t=e.stackId||"main";if(!this._idToStack.has(t))return this._idToStack.set(t,new Map([[e.view,e]])),this._viewToStack.set(e.view,this._idToStack.get(t)),this._numberOfStacks=this._idToStack.size,void(this._visibleStack&&!e.singleViewMode||this.showStack(t));var n=this._idToStack.get(t);e.singleViewMode&&this.showStack(t),n.set(e.view,e),this._viewToStack.set(e.view,n),n===this._visibleStack&&this._showView(e)}},{key:"remove",value:function(e){if(!this.hasView(e))throw new It.b("contextualballoon-remove-view-not-exist: Cannot remove the configuration of a non-existent view.",[this,e]);var t=this._viewToStack.get(e);this._singleViewMode&&this.visibleView===e&&(this._singleViewMode=!1),this.visibleView===e&&(1===t.size?this._idToStack.size>1?this._showNextStack():(this.view.hide(),this.visibleView=null,this._rotatorView.hideView()):this._showView(Array.from(t.values())[t.size-2])),1===t.size?(this._idToStack.delete(this._getStackId(t)),this._numberOfStacks=this._idToStack.size):t.delete(e),this._viewToStack.delete(e)}},{key:"updatePosition",value:function(e){e&&(this._visibleStack.get(this.visibleView).position=e),this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition()}},{key:"showStack",value:function(e){this.visibleStack=e;var t=this._idToStack.get(e);if(!t)throw new It.b("contextualballoon-showstack-stack-not-exist: Cannot show a stack that does not exist.",this);this._visibleStack!==t&&this._showView(Array.from(t.values()).pop())}},{key:"_getStackId",value:function(e){return Array.from(this._idToStack.entries()).find((function(t){return t[1]===e}))[0]}},{key:"_showNextStack",value:function(){var e=Array.from(this._idToStack.values()),t=e.indexOf(this._visibleStack)+1;e[t]||(t=0),this.showStack(this._getStackId(e[t]))}},{key:"_showPrevStack",value:function(){var e=Array.from(this._idToStack.values()),t=e.indexOf(this._visibleStack)-1;e[t]||(t=e.length-1),this.showStack(this._getStackId(e[t]))}},{key:"_createRotatorView",value:function(){var e=this,t=new jf(this.editor.locale),n=this.editor.locale.t;return this.view.content.add(t),t.bind("isNavigationVisible").to(this,"_numberOfStacks",this,"_singleViewMode",(function(e,t){return!t&&e>1})),t.on("change:isNavigationVisible",(function(){return e.updatePosition()}),{priority:"low"}),t.bind("counter").to(this,"visibleView",this,"_numberOfStacks",(function(t,r){if(r<2)return"";var i=Array.from(e._idToStack.values()).indexOf(e._visibleStack)+1;return n("bn",[i,r])})),t.buttonNextView.on("execute",(function(){t.focusTracker.isFocused&&e.editor.editing.view.focus(),e._showNextStack()})),t.buttonPrevView.on("execute",(function(){t.focusTracker.isFocused&&e.editor.editing.view.focus(),e._showPrevStack()})),t}},{key:"_createFakePanelsView",value:function(){var e=new Lf(this.editor.locale,this.view);return e.bind("numberOfPanels").to(this,"_numberOfStacks",this,"_singleViewMode",(function(e,t){return!t&&e>=2?Math.min(e-1,2):0})),e.listenTo(this.view,"change:top",(function(){return e.updatePosition()})),e.listenTo(this.view,"change:left",(function(){return e.updatePosition()})),this.editor.ui.view.body.add(e),e}},{key:"_showView",value:function(e){var t=e.view,n=e.balloonClassName,r=void 0===n?"":n,i=e.withArrow,o=void 0===i||i,a=e.singleViewMode,s=void 0!==a&&a;this.view.class=r,this.view.withArrow=o,this._rotatorView.showView(t),this.visibleView=t,this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition(),s&&(this._singleViewMode=!0)}},{key:"_getBalloonPosition",value:function(){var e=Array.from(this._visibleStack.values()).pop().position;return e&&!e.limiter&&(e=Object.assign({},e,{limiter:this.positionLimiter})),e}},{key:"_visibleStack",get:function(){return this._viewToStack.get(this.visibleView)}}]),t}(xl),jf=function(e){function t(e){var n;f(this,t),n=h(this,p(t).call(this,e));var r=e.t,i=n.bindTemplate;return n.set("isNavigationVisible",!0),n.focusTracker=new vs,n.buttonPrevView=n._createButtonView(r("bo"),Nf),n.buttonNextView=n._createButtonView(r("bp"),If),n.content=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-rotator"],"z-index":"-1"},children:[{tag:"div",attributes:{class:["ck-balloon-rotator__navigation",i.to("isNavigationVisible",(function(e){return e?"":"ck-hidden"}))]},children:[n.buttonPrevView,{tag:"span",attributes:{class:["ck-balloon-rotator__counter"]},children:[{text:i.to("counter")}]},n.buttonNextView]},{tag:"div",attributes:{class:"ck-balloon-rotator__content"},children:n.content}]}),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.focusTracker.add(this.element)}},{key:"showView",value:function(e){this.hideView(),this.content.add(e)}},{key:"hideView",value:function(){this.content.clear()}},{key:"_createButtonView",value:function(e,t){var n=new ll(this.locale);return n.set({label:e,icon:t,tooltip:!0}),n}}]),t}(Hs),Lf=function(e){function t(e,n){var r;f(this,t);var i=(r=h(this,p(t).call(this,e))).bindTemplate;return r.set("top",0),r.set("left",0),r.set("height",0),r.set("width",0),r.set("numberOfPanels",0),r.content=r.createCollection(),r._balloonPanelView=n,r.setTemplate({tag:"div",attributes:{class:["ck-fake-panel",i.to("numberOfPanels",(function(e){return 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t=e.editing.view,n=Af.defaultPositions;return{target:t.domConverter.viewToDom(t.document.selection.getSelectedElement()),positions:[n.northArrowSouth,n.northArrowSouthWest,n.northArrowSouthEast,n.southArrowNorth,n.southArrowNorthWest,n.southArrowNorthEast]}}var zf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this._createButton(),this._createForm()}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this._form.destroy()}},{key:"_createButton",value:function(){var e=this,t=this.editor,n=t.t;t.ui.componentFactory.add("imageTextAlternative",(function(r){var i=t.commands.get("imageTextAlternative"),o=new ll(r);return o.set({label:n("bv"),icon:'<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M5.085 6.22L2.943 4.078a.75.75 0 1 1 1.06-1.06l2.592 2.59A11.094 11.094 0 0 1 10 5.068c4.738 0 8.578 3.101 8.578 5.083 0 1.197-1.401 2.803-3.555 3.887l1.714 1.713a.75.75 0 0 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Cf(t.locale),this._form.render(),this.listenTo(this._form,"submit",(function(){t.execute("imageTextAlternative",{newValue:e._form.labeledInput.inputView.element.value}),e._hideForm(!0)})),this.listenTo(this._form,"cancel",(function(){e._hideForm(!0)})),this._form.keystrokes.set("Esc",(function(t,n){e._hideForm(!0),n()})),this.listenTo(t.ui,"update",(function(){fc(n.selection)?e._isVisible&&function(e){var t=e.plugins.get("ContextualBalloon");if(fc(e.editing.view.document.selection)){var n=Ff(e);t.updatePosition(n)}}(t):e._hideForm(!0)})),pl({emitter:this._form,activator:function(){return e._isVisible},contextElements:[this._balloon.view.element],callback:function(){return e._hideForm()}})}},{key:"_showForm",value:function(){if(!this._isVisible){var e=this.editor,t=e.commands.get("imageTextAlternative"),n=this._form.labeledInput;this._isInBalloon||this._balloon.add({view:this._form,position:Ff(e)}),n.value=n.inputView.element.value=t.value||"",this._form.labeledInput.select()}}},{key:"_hideForm",value:function(e){this._isInBalloon&&(this._form.focusTracker.isFocused&&this._form.saveButtonView.focus(),this._balloon.remove(this._form),e&&this.editor.editing.view.focus())}},{key:"_isVisible",get:function(){return this._balloon.visibleView===this._form}},{key:"_isInBalloon",get:function(){return this._balloon.hasView(this._form)}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"ImageTextAlternativeUI"}}]),t}(xl),Vf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[bf,zf]}},{key:"pluginName",get:function(){return"ImageTextAlternative"}}]),t}(xl);n(61);var Bf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[mc,mf,Vf]}},{key:"pluginName",get:function(){return"Image"}}]),t}(xl),Uf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).buttonView=new ll(e),n._fileInputView=new Hf(e),n._fileInputView.bind("acceptedType").to(o(n)),n._fileInputView.bind("allowMultipleFiles").to(o(n)),n._fileInputView.delegate("done").to(o(n)),n.setTemplate({tag:"span",attributes:{class:"ck-file-dialog-button"},children:[n.buttonView,n._fileInputView]}),n.buttonView.on("execute",(function(){n._fileInputView.open()})),n}return v(t,e),d(t,[{key:"focus",value:function(){this.buttonView.focus()}}]),t}(Hs),Hf=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("acceptedType"),n.set("allowMultipleFiles",!1);var r=n.bindTemplate;return n.setTemplate({tag:"input",attributes:{class:["ck-hidden"],type:"file",tabindex:"-1",accept:r.to("acceptedType"),multiple:r.to("allowMultipleFiles")},on:{change:r.to((function(){n.element&&n.element.files&&n.element.files.length&&n.fire("done",n.element.files),n.element.value=""}))}}),n}return v(t,e),d(t,[{key:"open",value:function(){this.element.click()}}]),t}(Hs);function qf(e){var t=e.map((function(e){return e.replace("+","\\+")}));return new RegExp("^image\\/(".concat(t.join("|"),")$"))}function Wf(e){return new Promise((function(t,n){var r=e.getAttribute("src");fetch(r).then((function(e){return e.blob()})).then((function(e){var i=function(e,t){return e.type?e.type:t.match(/data:(image\/\w+);base64/)?t.match(/data:(image\/\w+);base64/)[1].toLowerCase():"image/jpeg"}(e,r),o=function(e,t,n){try{return new File([e],t,{type:n})}catch(e){return null}}(e,"image.".concat(i.replace("image/","")),i);o?t(o):n()})).catch(n)}))}var Yf=function(e){function t(){return 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v(t,e),d(t,null,[{key:"requires",get:function(){return[_u,tf,El]}},{key:"pluginName",get:function(){return"ImageUploadEditing"}}]),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.model.document,r=t.model.schema,i=t.conversion,o=t.plugins.get(_u),a=qf(t.config.get("image.upload.types"));r.extend("image",{allowAttributes:["uploadId","uploadStatus"]}),t.commands.add("imageUpload",new td(t)),i.for("upcast").attributeToAttribute({view:{name:"img",key:"uploadId"},model:"uploadId"}),this.listenTo(t.editing.view.document,"clipboardInput",(function(e,n){if(!function(e){return Array.from(e.types).includes("text/html")&&""!==e.getData("text/html")}(n.dataTransfer)){var r=Array.from(n.dataTransfer.files).filter((function(e){return!!e&&a.test(e.type)})),i=n.targetRanges.map((function(e){return t.editing.mapper.toModelRange(e)}));t.model.change((function(n){n.setSelection(i),r.length&&(e.stop(),t.model.enqueueChange("default",(function(){t.execute("imageUpload",{file:r})})))}))}})),this.listenTo(t.plugins.get(El),"inputTransformation",(function(e,n){var r=Array.from(t.editing.view.createRangeIn(n.content)).filter((function(e){return function(e){return!(!e.is("element","img")||!e.getAttribute("src"))&&(e.getAttribute("src").match(/^data:image\/\w+;base64,/g)||e.getAttribute("src").match(/^blob:/g))}(e.item)&&!e.item.getAttribute("uploadProcessed")})).map((function(e){return{promise:Wf(e.item),imageElement:e.item}}));if(r.length){var i=new ed,a=!0,s=!1,l=void 0;try{for(var u,c=r[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;i.setAttribute("uploadProcessed",!0,f.imageElement);var d=o.createLoader(f.promise);d&&(i.setAttribute("src","",f.imageElement),i.setAttribute("uploadId",d.id,f.imageElement))}}catch(h){s=!0,l=h}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}})),t.editing.view.document.on("dragover",(function(e,t){t.preventDefault()})),n.on("change",(function(){var r=n.differ.getChanges({includeChangesInGraveyard:!0}),i=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(i=(l=u.next()).done);i=!0){var c=l.value;if("insert"==c.type&&"$text"!=c.name){var f=c.position.nodeAfter,d="$graveyard"==c.position.root.rootName,h=!0,p=!1,v=void 0;try{for(var m,g=id(t,f)[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=y.getAttribute("uploadId");if(b){var k=o.loaders.get(b);k&&(d?k.abort():"idle"==k.status&&e._readAndUpload(k,y))}}}catch(w){p=!0,v=w}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}}}}catch(w){a=!0,s=w}finally{try{i||null==u.return||u.return()}finally{if(a)throw s}}}))}},{key:"_readAndUpload",value:function(e,t){var n=this,r=this.editor,i=r.model,o=r.locale.t,a=r.plugins.get(_u),s=r.plugins.get(tf);return i.enqueueChange("transparent",(function(e){e.setAttribute("uploadStatus","reading",t)})),e.read().then((function(){var n=e.upload();if($n.isSafari){var o=r.editing.mapper.toViewElement(t).getChild(0);r.editing.view.once("render",(function(){if(o.parent){var e=r.editing.view.domConverter.mapViewToDom(o.parent);if(e){var t=e.style.display;e.style.display="none",e._ckHack=e.offsetHeight,e.style.display=t}}}))}return i.enqueueChange("transparent",(function(e){e.setAttribute("uploadStatus","uploading",t)})),n})).then((function(e){i.enqueueChange("transparent",(function(r){r.setAttributes({uploadStatus:"complete",src:e.default},t),n._parseAndSetSrcsetAttributeOnImage(e,t,r)})),l()})).catch((function(n){if("error"!==e.status&&"aborted"!==e.status)throw n;"error"==e.status&&n&&s.showWarning(n,{title:o("an"),namespace:"upload"}),l(),i.enqueueChange("transparent",(function(e){e.remove(t)}))}));function l(){i.enqueueChange("transparent",(function(e){e.removeAttribute("uploadId",t),e.removeAttribute("uploadStatus",t)})),a.destroyLoader(e)}}},{key:"_parseAndSetSrcsetAttributeOnImage",value:function(e,t,n){var r=0,i=Object.keys(e).filter((function(e){var t=parseInt(e,10);if(!isNaN(t))return r=Math.max(r,t),!0})).map((function(t){return"".concat(e[t]," ").concat(t,"w")})).join(", ");""!=i&&n.setAttribute("srcset",{data:i,width:r},t)}}]),t}(xl);function id(e,t){return Array.from(e.model.createRangeOn(t)).filter((function(e){return e.item.is("image")})).map((function(e){return e.item}))}var od=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"ImageUpload"}},{key:"requires",get:function(){return[rd,Yf,Gf]}}]),t}(xl),ad=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.model,t=Uu(e.document.selection.getSelectedBlocks());this.value=!!t&&t.is("paragraph"),this.isEnabled=!!t&&sd(t,e.schema)}},{key:"execute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=this.editor.model,n=t.document;t.change((function(r){var i=(e.selection||n.selection).getSelectedBlocks(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;!c.is("paragraph")&&sd(c,t.schema)&&r.rename(c,"paragraph")}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al);function sd(e,t){return t.checkChild(e.parent,"paragraph")&&!t.isObject(e)}var ld=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,n=this.editor,r=n.model,i=n.data;n.commands.add("paragraph",new ad(n)),r.schema.register("paragraph",{inheritAllFrom:"$block"}),n.conversion.elementToElement({model:"paragraph",view:"p"}),n.conversion.for("upcast").elementToElement({model:function(e,n){return t.paragraphLikeElements.has(e.name)?e.isEmpty?null:n.createElement("paragraph"):null},converterPriority:"low"}),i.upcastDispatcher.on("element",(function(e,t,n){n.consumable.test(t.viewItem,{name:t.viewItem.name})&&cd(t.viewItem,t.modelCursor,n.schema)&&Object.assign(t,ud(t.viewItem,t.modelCursor,n))}),{priority:"low"}),i.upcastDispatcher.on("text",(function(e,t,n){t.modelRange||cd(t.viewItem,t.modelCursor,n.schema)&&Object.assign(t,ud(t.viewItem,t.modelCursor,n))}),{priority:"lowest"}),r.document.registerPostFixer((function(t){return e._autoparagraphEmptyRoots(t)})),n.data.on("ready",(function(){r.enqueueChange("transparent",(function(t){return e._autoparagraphEmptyRoots(t)}))}),{priority:"lowest"})}},{key:"_autoparagraphEmptyRoots",value:function(e){var t=this.editor.model,n=!0,r=!1,i=void 0;try{for(var o,a=t.document.getRootNames()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=t.document.getRoot(s);if(l.isEmpty&&"$graveyard"!=l.rootName&&t.schema.checkChild(l,"paragraph"))return e.insertElement("paragraph",l),!0}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}],[{key:"pluginName",get:function(){return"Paragraph"}}]),t}(xl);function ud(e,t,n){var r=n.writer.createElement("paragraph");return n.writer.insert(r,t),n.convertItem(e,n.writer.createPositionAt(r,0))}function cd(e,t,n){var r=n.createContext(t);return!!n.checkChild(r,"paragraph")&&!!n.checkChild(r.push("paragraph"),e)}ld.paragraphLikeElements=new Set(["blockquote","dd","div","dt","h1","h2","h3","h4","h5","h6","li","p","td"]);var fd=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).modelElements=n,r}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this,t=Uu(this.editor.model.document.selection.getSelectedBlocks());this.value=!!t&&this.modelElements.includes(t.name)&&t.name,this.isEnabled=!!t&&this.modelElements.some((function(n){return dd(t,n,e.editor.model.schema)}))}},{key:"execute",value:function(e){var t=this.editor.model,n=t.document,r=e.value;t.change((function(e){var i=Array.from(n.selection.getSelectedBlocks()).filter((function(e){return dd(e,r,t.schema)})),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;c.is(r)||e.rename(c,r)}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al);function dd(e,t,n){return n.checkChild(e.parent,t)&&!n.isObject(e)}var hd="paragraph",pd=function(e){function t(e){var n;return f(this,t),n=h(this,p(t).call(this,e)),e.config.define("heading",{options:[{model:"paragraph",title:"Paragraph",class:"ck-heading_paragraph"},{model:"heading1",view:"h2",title:"Heading 1",class:"ck-heading_heading1"},{model:"heading2",view:"h3",title:"Heading 2",class:"ck-heading_heading2"},{model:"heading3",view:"h4",title:"Heading 3",class:"ck-heading_heading3"}]}),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"HeadingEditing"}}]),d(t,[{key:"init",value:function(){var e=this.editor,t=e.config.get("heading.options"),n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.model!==hd&&(e.model.schema.register(l.model,{inheritAllFrom:"$block"}),e.conversion.elementToElement(l),n.push(l.model))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._addDefaultH1Conversion(e),e.commands.add("heading",new fd(e,n))}},{key:"afterInit",value:function(){var e=this.editor,t=e.commands.get("enter"),n=e.config.get("heading.options");t&&this.listenTo(t,"afterExecute",(function(t,r){var i=e.model.document.selection.getFirstPosition().parent;n.some((function(e){return i.is(e.model)}))&&!i.is(hd)&&0===i.childCount&&r.writer.rename(i,hd)}))}},{key:"_addDefaultH1Conversion",value:function(e){e.conversion.for("upcast").elementToElement({model:"heading1",view:"h1",converterPriority:jt.get("low")+1})}}],[{key:"requires",get:function(){return[ld]}}]),t}(xl),vd=function e(t,n){f(this,e),n&&mn(this,n),t&&this.set(t)};Yt(vd,wn),n(10);var md=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.t,r=function(e){var t=e.t,n={Paragraph:t("bw"),"Heading 1":t("bx"),"Heading 2":t("by"),"Heading 3":t("bz"),"Heading 4":t("ca"),"Heading 5":t("cb"),"Heading 6":t("cc")};return e.config.get("heading.options").map((function(e){var t=n[e.title];return t&&t!=e.title&&(e.title=t),e}))}(t),i=n("e"),o=n("f");t.ui.componentFactory.add("heading",(function(n){var a={},s=new Fn,l=t.commands.get("heading"),u=t.commands.get("paragraph"),c=[l],f=!0,d=!1,h=void 0;try{for(var p,v=function(){var e=p.value,t={type:"button",model:new vd({label:e.title,class:e.class,withText:!0})};"paragraph"===e.model?(t.model.bind("isOn").to(u,"value"),t.model.set("commandName","paragraph"),c.push(u)):(t.model.bind("isOn").to(l,"value",(function(t){return t===e.model})),t.model.set({commandName:"heading",commandValue:e.model})),s.add(t),a[e.model]=e.title},m=r[Symbol.iterator]();!(f=(p=m.next()).done);f=!0)v()}catch(y){d=!0,h=y}finally{try{f||null==m.return||m.return()}finally{if(d)throw h}}var g=vl(n);return ml(g,s),g.buttonView.set({isOn:!1,withText:!0,tooltip:o}),g.extendTemplate({attributes:{class:["ck-heading-dropdown"]}}),g.bind("isEnabled").toMany(c,"isEnabled",(function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];return t.some((function(e){return e}))})),g.buttonView.bind("label").to(l,"value",u,"value",(function(e,t){var n=e||t&&"paragraph";return a[n]?a[n]:i})),e.listenTo(g,"execute",(function(e){t.execute(e.source.commandName,e.source.commandValue?{value:e.source.commandValue}:void 0),t.editing.view.focus()})),g}))}}]),t}(xl);function gd(e){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(a&&a.is("caption"))return a}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return null}function yd(e){var t=e.parent;return"figcaption"==e.name&&t&&"figure"==t.name&&t.hasClass("image")?{name:!0}:null}var bd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.editing.view,r=t.model.schema,i=t.data,o=t.editing,a=t.t;r.register("caption",{allowIn:"image",allowContentOf:"$block",isLimit:!0}),t.model.document.registerPostFixer((function(t){return e._insertMissingModelCaptionElement(t)})),t.conversion.for("upcast").elementToElement({view:yd,model:"caption"}),i.downcastDispatcher.on("insert:caption",kd((function(e){return e.createContainerElement("figcaption")}),!1));var s=function(e,t){return function(n){var r=n.createEditableElement("figcaption");return n.setCustomProperty("imageCaption",!0,r),ys({view:e,element:r,text:t}),lc(r,n)}}(n,a("am"));o.downcastDispatcher.on("insert:caption",kd(s)),o.downcastDispatcher.on("insert",this._fixCaptionVisibility((function(e){return e.item})),{priority:"high"}),o.downcastDispatcher.on("remove",this._fixCaptionVisibility((function(e){return e.position.parent})),{priority:"high"}),n.document.registerPostFixer((function(t){return e._updateCaptionVisibility(t)}))}},{key:"_updateCaptionVisibility",value:function(e){var t,n=this.editor.editing.mapper,r=this._lastSelectedCaption,i=this.editor.model.document.selection,o=i.getSelectedElement();if(o&&o.is("image")){var a=gd(o);t=n.toViewElement(a)}var s=wd(i.getFirstPosition().parent);if(s&&(t=n.toViewElement(s)),t)return r?r===t?xd(t,e):(_d(r,e),this._lastSelectedCaption=t,xd(t,e)):(this._lastSelectedCaption=t,xd(t,e));if(r){var l=_d(r,e);return this._lastSelectedCaption=null,l}return!1}},{key:"_fixCaptionVisibility",value:function(e){var t=this;return function(n,r,i){var o=wd(e(r)),a=t.editor.editing.mapper,s=i.writer;if(o){var l=a.toViewElement(o);l&&(o.childCount?s.removeClass("ck-hidden",l):s.addClass("ck-hidden",l))}}}},{key:"_insertMissingModelCaptionElement",value:function(e){var t=this.editor.model,n=t.document.differ.getChanges(),r=[],i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if("insert"==u.type&&"$text"!=u.name){var c=u.position.nodeAfter;if(c.is("image")&&!gd(c)&&r.push(c),!c.is("image")&&c.childCount){var f=!0,d=!1,h=void 0;try{for(var p,v=t.createRangeIn(c).getItems()[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;m.is("image")&&!gd(m)&&r.push(m)}}catch(k){d=!0,h=k}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}}}}catch(k){o=!0,a=k}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}for(var g=0,y=r;g<y.length;g++){var b=y[g];e.appendElement("caption",b)}return!!r.length}}],[{key:"pluginName",get:function(){return"ImageCaptionEditing"}}]),t}(xl);function kd(e){var t=!(arguments.length>1&&void 0!==arguments[1])||arguments[1];return function(n,r,i){var o=r.item;if((o.childCount||t)&&dc(o.parent)){if(!i.consumable.consume(r.item,"insert"))return;var a=i.mapper.toViewElement(r.range.start.parent),s=e(i.writer),l=i.writer;o.childCount||l.addClass("ck-hidden",s),function(e,t,n,r){var i=r.writer.createPositionAt(n,"end");r.writer.insert(i,e),r.mapper.bindElements(t,e)}(s,r.item,a,i)}}}function wd(e){var t=e.getAncestors({includeSelf:!0}).find((function(e){return"caption"==e.name}));return t&&t.parent&&"image"==t.parent.name?t:null}function _d(e,t){return!e.childCount&&!e.hasClass("ck-hidden")&&(t.addClass("ck-hidden",e),!0)}function xd(e,t){return!!e.hasClass("ck-hidden")&&(t.removeClass("ck-hidden",e),!0)}n(70);var Td=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).defaultStyle=!1,r.styles=n.reduce((function(e,t){return e[t.name]=t,t.isDefault&&(r.defaultStyle=t.name),e}),{}),r}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.model.document.selection.getSelectedElement();if(this.isEnabled=dc(e),e)if(e.hasAttribute("imageStyle")){var t=e.getAttribute("imageStyle");this.value=!!this.styles[t]&&t}else this.value=this.defaultStyle;else this.value=!1}},{key:"execute",value:function(e){var t=this,n=e.value,r=this.editor.model,i=r.document.selection.getSelectedElement();r.change((function(e){t.styles[n].isDefault?e.removeAttribute("imageStyle",i):e.setAttribute("imageStyle",n,i)}))}}]),t}(Al);function Cd(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.name===e)return s}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}var Sd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 4.5V3h16v1.5zm2.5 3V12h11V7.5h-11zM4.061 6H15.94c.586 0 1.061.407 1.061.91v5.68c0 .503-.475.91-1.061.91H4.06c-.585 0-1.06-.407-1.06-.91V6.91C3 6.406 3.475 6 4.061 6zM2 16.5V15h16v1.5z"/></svg>',Ed='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg" clip-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="1.414"><path d="M18 4.5V3H2v1.5h16zm0 3V6h-5.674v1.5H18zm0 3V9h-5.674v1.5H18zm0 3V12h-5.674v1.5H18zm-8.5-6V12h-6V7.5h6zm.818-1.5H2.682C2.305 6 2 6.407 2 6.91v5.68c0 .503.305.91.682.91h7.636c.377 0 .682-.407.682-.91V6.91c0-.503-.305-.91-.682-.91zM18 16.5V15H2v1.5h16z"/></svg>',Ad='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 4.5V3h16v1.5zm4.5 3V12h7V7.5h-7zM5.758 6h8.484c.419 0 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0!==arguments[0]?arguments[0]:[]).map(Id)}function Id(e){if("string"==typeof e){var t=e;Md[t]?e=Object.assign({},Md[t]):(console.warn(Object(It.a)("image-style-not-found: There is no such image style of given name."),{name:t}),e={name:t})}else if(Md[e.name]){var n=Md[e.name],r=Object.assign({},e);for(var i in n)e.hasOwnProperty(i)||(r[i]=n[i]);e=r}return"string"==typeof e.icon&&Od[e.icon]&&(e.icon=Od[e.icon]),e}var Dd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.data,r=e.editing;e.config.define("image.styles",["full","side"]);var i=Nd(e.config.get("image.styles"));t.extend("image",{allowAttributes:"imageStyle"});var o=function(e){return function(t,n,r){if(r.consumable.consume(n.item,t.name)){var i=Cd(n.attributeNewValue,e),o=Cd(n.attributeOldValue,e),a=r.mapper.toViewElement(n.item),s=r.writer;o&&s.removeClass(o.className,a),i&&s.addClass(i.className,a)}}}(i);r.downcastDispatcher.on("attribute:imageStyle:image",o),n.downcastDispatcher.on("attribute:imageStyle:image",o),n.upcastDispatcher.on("element:figure",function(e){var t=e.filter((function(e){return!e.isDefault}));return function(e,n,r){if(n.modelRange){var i=n.viewItem,o=Uu(n.modelRange.getItems());if(r.schema.checkAttribute(o,"imageStyle")){var a=!0,s=!1,l=void 0;try{for(var u,c=t[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;r.consumable.consume(i,{classes:f.className})&&r.writer.setAttribute("imageStyle",f.name,o)}}catch(d){s=!0,l=d}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}}}}(i),{priority:"low"}),e.commands.add("imageStyle",new Td(e,i))}}],[{key:"pluginName",get:function(){return"ImageStyleEditing"}}]),t}(xl);n(72);var Rd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t[s.title]&&(s.title=t[s.title])}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return e}(Nd(this.editor.config.get("image.styles")),this.localizedDefaultStylesTitles),t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._createButton(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"_createButton",value:function(e){var t=this,n=this.editor,r="imageStyle:".concat(e.name);n.ui.componentFactory.add(r,(function(r){var i=n.commands.get("imageStyle"),o=new ll(r);return o.set({label:e.title,icon:e.icon,tooltip:!0,isToggleable:!0}),o.bind("isEnabled").to(i,"isEnabled"),o.bind("isOn").to(i,"value",(function(t){return t===e.name})),t.listenTo(o,"execute",(function(){return n.execute("imageStyle",{value:e.name})})),o}))}},{key:"localizedDefaultStylesTitles",get:function(){var e=this.editor.t;return{"Full size image":e("ah"),"Side image":e("ai"),"Left aligned image":e("aj"),"Centered image":e("ak"),"Right aligned image":e("al")}}}],[{key:"pluginName",get:function(){return"ImageStyleUI"}}]),t}(xl),jd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor;if(t.plugins.has("BalloonToolbar")){var n=t.plugins.get("BalloonToolbar");this.listenTo(n,"show",(function(e){(function(e){var t=e.getSelectedElement();return!(!t||!oc(t))})(t.editing.view.document.selection)&&e.stop()}),{priority:"high"})}this._toolbarDefinitions=new Map,this._balloon=this.editor.plugins.get("ContextualBalloon"),this.listenTo(t.ui,"update",(function(){e._updateToolbarsVisibility()})),this.listenTo(t.ui.focusTracker,"change:isFocused",(function(){e._updateToolbarsVisibility()}),{priority:"low"})}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this);var e=!0,n=!1,r=void 0;try{for(var i,o=this._toolbarDefinitions.values()[Symbol.iterator]();!(e=(i=o.next()).done);e=!0)i.value.view.destroy()}catch(a){n=!0,r=a}finally{try{e||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"register",value:function(e,t){var n=t.ariaLabel,r=t.items,i=t.getRelatedElement,o=t.balloonClassName,a=void 0===o?"ck-toolbar-container":o,s=this.editor,l=s.t,u=new gl(s.locale);if(u.ariaLabel=n||l("ax"),this._toolbarDefinitions.has(e))throw new It.b("widget-toolbar-duplicated: Toolbar with the given id was already added.",this,{toolbarId:e});u.fillFromConfig(r,s.ui.componentFactory),this._toolbarDefinitions.set(e,{view:u,getRelatedElement:i,balloonClassName:a})}},{key:"_updateToolbarsVisibility",value:function(){var e=0,t=null,n=null,r=!0,i=!1,o=void 0;try{for(var a,s=this._toolbarDefinitions.values()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=l.getRelatedElement(this.editor.editing.view.document.selection);if(this.editor.ui.focusTracker.isFocused)if(u){var c=u.getAncestors().length;c>e&&(e=c,t=u,n=l)}else this._isToolbarInBalloon(l)&&this._hideToolbar(l);else this._isToolbarVisible(l)&&this._hideToolbar(l)}}catch(f){i=!0,o=f}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}n&&this._showToolbar(n,t)}},{key:"_hideToolbar",value:function(e){this._balloon.remove(e.view),this.stopListening(this._balloon,"change:visibleView")}},{key:"_showToolbar",value:function(e,t){var n=this;this._isToolbarVisible(e)?Ld(this.editor,t):this._isToolbarInBalloon(e)||(this._balloon.add({view:e.view,position:Fd(this.editor,t),balloonClassName:e.balloonClassName}),this.listenTo(this._balloon,"change:visibleView",(function(){var e=!0,t=!1,r=void 0;try{for(var i,o=n._toolbarDefinitions.values()[Symbol.iterator]();!(e=(i=o.next()).done);e=!0){var a=i.value;if(n._isToolbarVisible(a)){var s=a.getRelatedElement(n.editor.editing.view.document.selection);Ld(n.editor,s)}}}catch(l){t=!0,r=l}finally{try{e||null==o.return||o.return()}finally{if(t)throw r}}})))}},{key:"_isToolbarVisible",value:function(e){return this._balloon.visibleView===e.view}},{key:"_isToolbarInBalloon",value:function(e){return this._balloon.hasView(e.view)}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"WidgetToolbarRepository"}}]),t}(xl);function Ld(e,t){var n=e.plugins.get("ContextualBalloon"),r=Fd(e,t);n.updatePosition(r)}function Fd(e,t){var n=e.editing.view,r=Af.defaultPositions;return{target:n.domConverter.mapViewToDom(t),positions:[r.northArrowSouth,r.northArrowSouthWest,r.northArrowSouthEast,r.southArrowNorth,r.southArrowNorthWest,r.southArrowNorthEast]}}var zd=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e)))._childCommands=[],n}return v(t,e),d(t,[{key:"refresh",value:function(){}},{key:"execute",value:function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];this._getFirstEnabledCommand().execute(t)}},{key:"registerChildCommand",value:function(e){var t=this;this._childCommands.push(e),e.on("change:isEnabled",(function(){return t._checkEnabled()})),this._checkEnabled()}},{key:"_checkEnabled",value:function(){this.isEnabled=!!this._getFirstEnabledCommand()}},{key:"_getFirstEnabledCommand",value:function(){return this._childCommands.find((function(e){return e.isEnabled}))}}]),t}(Al),Vd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.commands.add("indent",new zd(e)),e.commands.add("outdent",new zd(e))}}],[{key:"pluginName",get:function(){return"IndentEditing"}}]),t}(xl),Bd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z"/><path d="M1.632 6.95L5.02 9.358a.4.4 0 0 1-.013.661l-3.39 2.207A.4.4 0 0 1 1 11.892V7.275a.4.4 0 0 1 .632-.326z"/></svg>\n',Ud='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z"/><path d="M4.368 6.95L.98 9.358a.4.4 0 0 0 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n,r=arguments.length>1&&void 0!==arguments[1]?arguments[1]:[];f(this,t),n=h(this,p(t).call(this,e));var i=e.t;n.focusTracker=new vs,n.keystrokes=new ss,n.urlInputView=n._createUrlInput(),n.saveButtonView=n._createButton(i("bf"),xf,"ck-button-save"),n.saveButtonView.type="submit",n.cancelButtonView=n._createButton(i("bg"),Tf,"ck-button-cancel","cancel"),n._manualDecoratorSwitches=n._createManualDecoratorSwitches(r),n.children=n._createFormChildren(r),n._focusables=new xs,n._focusCycler=new Js({focusables:n._focusables,focusTracker:n.focusTracker,keystrokeHandler:n.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}});var o=["ck","ck-link-form"];return r.length&&o.push("ck-link-form_layout-vertical"),n.setTemplate({tag:"form",attributes:{class:o,tabindex:"-1"},children:n.children}),n}return v(t,e),d(t,[{key:"getDecoratorSwitchesState",value:function(){return Array.from(this._manualDecoratorSwitches).reduce((function(e,t){return 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hl(t.locale);r.set({name:e.id,label:e.label,withText:!0}),r.bind("isOn").to(e,"value"),r.on("execute",(function(){e.set("value",!r.isOn)})),n.add(r)},l=e[Symbol.iterator]();!(r=(a=l.next()).done);r=!0)s()}catch(u){i=!0,o=u}finally{try{r||null==l.return||l.return()}finally{if(i)throw o}}return n}},{key:"_createFormChildren",value:function(e){var t=this.createCollection();if(t.add(this.urlInputView),e.length){var n=new Hs;n.setTemplate({tag:"ul",children:this._manualDecoratorSwitches.map((function(e){return{tag:"li",children:[e],attributes:{class:["ck","ck-list__item"]}}})),attributes:{class:["ck","ck-reset","ck-list"]}}),t.add(n)}return t.add(this.saveButtonView),t.add(this.cancelButtonView),t}}]),t}(Hs),Yd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 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e=this;l(p(t.prototype),"render",this).call(this),[this.previewButtonView,this.editButtonView,this.unlinkButtonView].forEach((function(t){e._focusables.add(t),e.focusTracker.add(t.element)})),this.keystrokes.listenTo(this.element)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"_createButton",value:function(e,t,n){var r=new ll(this.locale);return r.set({label:e,icon:t,tooltip:!0}),r.delegate("execute").to(this,n),r}},{key:"_createPreviewButton",value:function(){var e=new ll(this.locale),t=this.bindTemplate,n=this.t;return e.set({withText:!0,tooltip:n("bd")}),e.extendTemplate({attributes:{class:["ck","ck-link-actions__preview"],href:t.to("href",(function(e){return e&&Uc(e)})),target:"_blank",rel:"noopener noreferrer"}}),e.bind("label").to(this,"href",(function(e){return e||n("be")})),e.bind("isEnabled").to(this,"href",(function(e){return!!e})),e.template.tag="a",e.template.eventListeners={},e}}]),t}(Hs),Qd="Ctrl+K",Kd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.editing.view.addObserver(qd),this.actionsView=this._createActionsView(),this.formView=this._createFormView(),this._balloon=e.plugins.get(Rf),this._createToolbarLinkButton(),this._enableUserBalloonInteractions()}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this.formView.destroy()}},{key:"_createActionsView",value:function(){var e=this,t=this.editor,n=new Gd(t.locale),r=t.commands.get("link"),i=t.commands.get("unlink");return n.bind("href").to(r,"value"),n.editButtonView.bind("isEnabled").to(r),n.unlinkButtonView.bind("isEnabled").to(i),this.listenTo(n,"edit",(function(){e._addFormView()})),this.listenTo(n,"unlink",(function(){t.execute("unlink"),e._hideUI()})),n.keystrokes.set("Esc",(function(t,n){e._hideUI(),n()})),n.keystrokes.set(Qd,(function(t,n){e._addFormView(),n()})),n}},{key:"_createFormView",value:function(){var e=this,t=this.editor,n=t.commands.get("link"),r=new Wd(t.locale,n.manualDecorators);return r.urlInputView.bind("value").to(n,"value"),r.urlInputView.bind("isReadOnly").to(n,"isEnabled",(function(e){return!e})),r.saveButtonView.bind("isEnabled").to(n),this.listenTo(r,"submit",(function(){t.execute("link",r.urlInputView.inputView.element.value,r.getDecoratorSwitchesState()),e._closeFormView()})),this.listenTo(r,"cancel",(function(){e._closeFormView()})),r.keystrokes.set("Esc",(function(t,n){e._closeFormView(),n()})),r}},{key:"_createToolbarLinkButton",value:function(){var e=this,t=this.editor,n=t.commands.get("link"),r=t.t;t.keystrokes.set(Qd,(function(t,r){r(),n.isEnabled&&e._showUI(!0)})),t.ui.componentFactory.add("link",(function(t){var i=new ll(t);return i.isEnabled=!0,i.label=r("as"),i.icon='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184z"/></svg>',i.keystroke=Qd,i.tooltip=!0,i.isToggleable=!0,i.bind("isEnabled").to(n,"isEnabled"),i.bind("isOn").to(n,"value",(function(e){return!!e})),e.listenTo(i,"execute",(function(){return e._showUI(!0)})),i}))}},{key:"_enableUserBalloonInteractions",value:function(){var e=this,t=this.editor.editing.view.document;this.listenTo(t,"click",(function(){e._getSelectedLinkElement()&&e._showUI()})),this.editor.keystrokes.set("Tab",(function(t,n){e._areActionsVisible&&!e.actionsView.focusTracker.isFocused&&(e.actionsView.focus(),n())}),{priority:"high"}),this.editor.keystrokes.set("Esc",(function(t,n){e._isUIVisible&&(e._hideUI(),n())})),pl({emitter:this.formView,activator:function(){return e._isUIInPanel},contextElements:[this._balloon.view.element],callback:function(){return e._hideUI()}})}},{key:"_addActionsView",value:function(){this._areActionsInPanel||this._balloon.add({view:this.actionsView,position:this._getBalloonPositionData()})}},{key:"_addFormView",value:function(){if(!this._isFormInPanel){var e=this.editor.commands.get("link");this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),this._balloon.visibleView===this.formView&&this.formView.urlInputView.select(),this.formView.urlInputView.inputView.element.value=e.value||""}}},{key:"_closeFormView",value:function(){var e=this.editor.commands.get("link");e.restoreManualDecoratorStates(),void 0!==e.value?this._removeFormView():this._hideUI()}},{key:"_removeFormView",value:function(){this._isFormInPanel&&(this.formView.saveButtonView.focus(),this._balloon.remove(this.formView),this.editor.editing.view.focus())}},{key:"_showUI",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0];this.editor.commands.get("link").isEnabled&&(this._getSelectedLinkElement()?(this._areActionsVisible?this._addFormView():this._addActionsView(),e&&this._balloon.showStack("main")):(this._addActionsView(),e&&this._balloon.showStack("main"),this._addFormView()),this._startUpdatingUI())}},{key:"_hideUI",value:function(){if(this._isUIInPanel){var e=this.editor;this.stopListening(e.ui,"update"),this.stopListening(this._balloon,"change:visibleView"),e.editing.view.focus(),this._removeFormView(),this._balloon.remove(this.actionsView)}}},{key:"_startUpdatingUI",value:function(){var e=this,t=this.editor,n=t.editing.view.document,r=this._getSelectedLinkElement(),i=a(),o=function(){var t=e._getSelectedLinkElement(),n=a();r&&!t||!r&&n!==i?e._hideUI():e._isUIVisible&&e._balloon.updatePosition(e._getBalloonPositionData()),r=t,i=n};function a(){return n.selection.focus.getAncestors().reverse().find((function(e){return e.is("element")}))}this.listenTo(t.ui,"update",o),this.listenTo(this._balloon,"change:visibleView",o)}},{key:"_getBalloonPositionData",value:function(){var e=this.editor.editing.view,t=e.document,n=this._getSelectedLinkElement();return{target:n?e.domConverter.mapViewToDom(n):e.domConverter.viewRangeToDom(t.selection.getFirstRange())}}},{key:"_getSelectedLinkElement",value:function(){var e=this.editor.editing.view,t=e.document.selection;if(t.isCollapsed)return Jd(t.getFirstPosition());var n=t.getFirstRange().getTrimmed(),r=Jd(n.start),i=Jd(n.end);return r&&r==i&&e.createRangeIn(r).getTrimmed().isEqual(n)?r:null}},{key:"_isFormInPanel",get:function(){return this._balloon.hasView(this.formView)}},{key:"_areActionsInPanel",get:function(){return this._balloon.hasView(this.actionsView)}},{key:"_areActionsVisible",get:function(){return this._balloon.visibleView===this.actionsView}},{key:"_isUIInPanel",get:function(){return this._isFormInPanel||this._areActionsInPanel}},{key:"_isUIVisible",get:function(){return this._balloon.visibleView==this.formView||this._areActionsVisible}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"LinkUI"}}]),t}(xl);function Jd(e){return e.getAncestors().find((function(e){return function(e){return e.is("attributeElement")&&!!e.getCustomProperty("link")}(e)}))}var Xd=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).type=n,r}return v(t,e),d(t,[{key:"refresh",value:function(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}},{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document,r=Array.from(n.selection.getSelectedBlocks()).filter((function(e){return eh(e,t.schema)})),i=!0===this.value;t.change((function(t){if(i){for(var n=r[r.length-1].nextSibling,o=Number.POSITIVE_INFINITY,a=[];n&&"listItem"==n.name&&0!==n.getAttribute("listIndent");){var s=n.getAttribute("listIndent");s<o&&(o=s);var l=s-o;a.push({element:n,listIndent:l}),n=n.nextSibling}a=a.reverse();var u=!0,c=!1,f=void 0;try{for(var d,h=a[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;t.setAttribute("listIndent",p.listIndent,p.element)}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}if(!i){var v=Number.POSITIVE_INFINITY,m=!0,g=!1,y=void 0;try{for(var b,k=r[Symbol.iterator]();!(m=(b=k.next()).done);m=!0){var w=b.value;w.is("listItem")&&w.getAttribute("listIndent")<v&&(v=w.getAttribute("listIndent"))}}catch(A){g=!0,y=A}finally{try{m||null==k.return||k.return()}finally{if(g)throw y}}Zd(r,!0,v=0===v?1:v),Zd(r,!1,v)}var _=!0,x=!1,T=void 0;try{for(var C,S=r.reverse()[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;i&&"listItem"==E.name?t.rename(E,"paragraph"):i||"listItem"==E.name?i||"listItem"!=E.name||E.getAttribute("listType")==e.type||t.setAttribute("listType",e.type,E):(t.setAttributes({listType:e.type,listIndent:0},E),t.rename(E,"listItem"))}}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}}))}},{key:"_getValue",value:function(){var e=Uu(this.editor.model.document.selection.getSelectedBlocks());return!!e&&e.is("listItem")&&e.getAttribute("listType")==this.type}},{key:"_checkEnabled",value:function(){if(this.value)return!0;var e=this.editor.model.document.selection,t=this.editor.model.schema,n=Uu(e.getSelectedBlocks());return!!n&&eh(n,t)}}]),t}(Al);function Zd(e,t,n){var r=t?e[0]:e[e.length-1];if(r.is("listItem"))for(var i=r[t?"previousSibling":"nextSibling"],o=r.getAttribute("listIndent");i&&i.is("listItem")&&i.getAttribute("listIndent")>=n;)o>i.getAttribute("listIndent")&&(o=i.getAttribute("listIndent")),i.getAttribute("listIndent")==o&&e[t?"unshift":"push"](i),i=i[t?"previousSibling":"nextSibling"]}function eh(e,t){return t.checkChild(e.parent,"listItem")&&!t.isObject(e)}var th=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e)))._indentBy="forward"==n?1:-1,r}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this._checkEnabled()}},{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document,r=Array.from(n.selection.getSelectedBlocks());t.change((function(t){for(var n=r[r.length-1],i=n.nextSibling;i&&"listItem"==i.name&&i.getAttribute("listIndent")>n.getAttribute("listIndent");)r.push(i),i=i.nextSibling;e._indentBy<0&&(r=r.reverse());var o=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f=c.getAttribute("listIndent")+e._indentBy;f<0?t.rename(c,"paragraph"):t.setAttribute("listIndent",f,c)}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}},{key:"_checkEnabled",value:function(){var e=Uu(this.editor.model.document.selection.getSelectedBlocks());if(!e||!e.is("listItem"))return!1;if(this._indentBy>0){for(var t=e.getAttribute("listIndent"),n=e.getAttribute("listType"),r=e.previousSibling;r&&r.is("listItem")&&r.getAttribute("listIndent")>=t;){if(r.getAttribute("listIndent")==t)return r.getAttribute("listType")==n;r=r.previousSibling}return!1}return!0}}]),t}(Al);function nh(e,t,n,r){var i=t.parent,o=n.mapper,a=n.writer,s=o.toViewPosition(r.createPositionBefore(e)),l=oh(e.previousSibling,{sameIndent:!0,smallerIndent:!0,listIndent:e.getAttribute("listIndent")}),u=e.previousSibling;if(l&&l.getAttribute("listIndent")==e.getAttribute("listIndent")){var c=o.toViewElement(l);s=a.breakContainer(a.createPositionAfter(c))}else s=u&&"listItem"==u.name?o.toViewPosition(r.createPositionAt(u,"end")):o.toViewPosition(r.createPositionBefore(e));if(s=ih(s),a.insert(s,i),u&&"listItem"==u.name){var f=o.toViewElement(u),d=a.createRange(a.createPositionAt(f,0),s).getWalker({ignoreElementEnd:!0}),h=!0,p=!1,v=void 0;try{for(var m,g=d[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value;if(y.item.is("li")){var b=a.breakContainer(a.createPositionBefore(y.item)),k=y.item.parent,w=a.createPositionAt(t,"end");rh(a,w.nodeBefore,w.nodeAfter),a.move(a.createRangeOn(k),w),d.position=b}}}catch(O){p=!0,v=O}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}}else{var _=i.nextSibling;if(_&&(_.is("ul")||_.is("ol"))){var x=null,T=!0,C=!1,S=void 0;try{for(var E,A=_.getChildren()[Symbol.iterator]();!(T=(E=A.next()).done);T=!0){var P=E.value,M=o.toModelElement(P);if(!(M&&M.getAttribute("listIndent")>e.getAttribute("listIndent")))break;x=P}}catch(O){C=!0,S=O}finally{try{T||null==A.return||A.return()}finally{if(C)throw S}}x&&(a.breakContainer(a.createPositionAfter(x)),a.move(a.createRangeOn(x.parent),a.createPositionAt(t,"end")))}}rh(a,i,i.nextSibling),rh(a,i.previousSibling,i)}function rh(e,t,n){return!t||!n||"ul"!=t.name&&"ol"!=t.name?null:t.name!=n.name||t.getAttribute("class")!==n.getAttribute("class")?null:e.mergeContainers(e.createPositionAfter(t))}function ih(e){return e.getLastMatchingPosition((function(e){return e.item.is("uiElement")}))}function oh(e,t){for(var n=!!t.sameIndent,r=!!t.smallerIndent,i=t.listIndent,o=e;o&&"listItem"==o.name;){var a=o.getAttribute("listIndent");if(n&&i==a||r&&i>a)return o;o=o.previousSibling}return null}function ah(e,t,n,r){e.ui.componentFactory.add(t,(function(i){var o=e.commands.get(t),a=new ll(i);return a.set({label:n,icon:r,tooltip:!0,isToggleable:!0}),a.bind("isOn","isEnabled").to(o,"value","isEnabled"),a.on("execute",(function(){return e.execute(t)})),a}))}function sh(){var e=!this.isEmpty&&("ul"==this.getChild(0).name||"ol"==this.getChild(0).name);return this.isEmpty||e?0:sn.call(this)}function lh(e){return function(t,n,r){var i=r.consumable;if(i.test(n.item,"insert")&&i.test(n.item,"attribute:listType")&&i.test(n.item,"attribute:listIndent")){i.consume(n.item,"insert"),i.consume(n.item,"attribute:listType"),i.consume(n.item,"attribute:listIndent");var o=n.item;nh(o,function(e,t){var n=t.mapper,r=t.writer,i="numbered"==e.getAttribute("listType")?"ol":"ul",o=function(e){var t=e.createContainerElement("li");return t.getFillerOffset=sh,t}(r),a=r.createContainerElement(i,null);return r.insert(r.createPositionAt(a,0),o),n.bindElements(e,o),o}(o,r),r,e)}}}function uh(e,t,n){if(n.consumable.consume(t.item,"attribute:listType")){var r=n.mapper.toViewElement(t.item),i=n.writer;i.breakContainer(i.createPositionBefore(r)),i.breakContainer(i.createPositionAfter(r));var o=r.parent,a="numbered"==t.attributeNewValue?"ol":"ul";i.rename(a,o)}}function ch(e,t,n){var r=n.mapper.toViewElement(t.item).parent,i=n.writer;rh(i,r,r.nextSibling),rh(i,r.previousSibling,r);var o=!0,a=!1,s=void 0;try{for(var l,u=t.item.getChildren()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;n.consumable.consume(c,"insert")}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}function fh(e,t,n){if("listItem"!=t.item.name){for(var r=n.mapper.toViewPosition(t.range.start),i=n.writer,o=[];("ul"==r.parent.name||"ol"==r.parent.name)&&"li"==(r=i.breakContainer(r)).parent.name;){var a=r,s=i.createPositionAt(r.parent,"end");if(!a.isEqual(s)){var l=i.remove(i.createRange(a,s));o.push(l)}r=i.createPositionAfter(r.parent)}if(o.length>0){for(var u=0;u<o.length;u++){var c=r.nodeBefore;if(r=i.insert(r,o[u]).end,u>0){var f=rh(i,c,c.nextSibling);f&&f.parent==c&&r.offset--}}rh(i,r.nodeBefore,r.nodeAfter)}}}function dh(e,t,n){var r=n.mapper.toViewPosition(t.position),i=r.nodeBefore,o=r.nodeAfter;rh(n.writer,i,o)}function hh(e,t,n){if(n.consumable.consume(t.viewItem,{name:!0})){var r=n.writer,i=r.createElement("listItem"),o=function(e){for(var t=0,n=e.parent;n;){if(n.is("li"))t++;else{var r=n.previousSibling;r&&r.is("li")&&t++}n=n.parent}return t}(t.viewItem);r.setAttribute("listIndent",o,i);var a=t.viewItem.parent&&"ol"==t.viewItem.parent.name?"numbered":"bulleted";r.setAttribute("listType",a,i);var s=n.splitToAllowedParent(i,t.modelCursor);if(!s)return;r.insert(i,s.position);var l=function(e,t,n){var r=n.writer,i=n.schema,o=r.createPositionAfter(e),a=!0,s=!1,l=void 0;try{for(var u,c=t[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;if("ul"==f.name||"ol"==f.name)o=n.convertItem(f,o).modelCursor;else{var d=n.convertItem(f,r.createPositionAt(e,"end")),h=d.modelRange.start.nodeAfter;h&&h.is("element")&&!i.checkChild(e,h.name)&&(e=d.modelCursor.parent.is("listItem")?d.modelCursor.parent:yh(d.modelCursor),o=r.createPositionAfter(e))}}}catch(p){s=!0,l=p}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}return o}(i,t.viewItem.getChildren(),n);t.modelRange=r.createRange(t.modelCursor,l),s.cursorParent?t.modelCursor=r.createPositionAt(s.cursorParent,0):t.modelCursor=t.modelRange.end}}function ph(e,t,n){if(n.consumable.test(t.viewItem,{name:!0}))for(var r=0,i=Array.from(t.viewItem.getChildren());r<i.length;r++){var o=i[r];!o.is("li")&&!kh(o)&&o._remove()}}function vh(e,t,n){if(n.consumable.test(t.viewItem,{name:!0})){if(0===t.viewItem.childCount)return;var r=u(t.viewItem.getChildren()),i=!1,o=!0,a=!0,s=!1,l=void 0;try{for(var c,f=r[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var 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u=o.toModelElement(i),c=1,f=r.nodeBefore;f&&kh(f);)c+=o.getModelLength(f),f=f.previousSibling;t.modelPosition=n.createPositionBefore(u).getShiftedBy(c),e.stop()}})),r.mapper.on("modelToViewPosition",mh(i.view)),t.conversion.for("editingDowncast").add((function(e){e.on("insert",fh,{priority:"high"}),e.on("insert:listItem",lh(t.model)),e.on("attribute:listType:listItem",uh,{priority:"high"}),e.on("attribute:listType:listItem",ch,{priority:"low"}),e.on("attribute:listIndent:listItem",function(e){return function(t,n,r){if(r.consumable.consume(n.item,"attribute:listIndent")){var i=r.mapper.toViewElement(n.item),o=r.writer;o.breakContainer(o.createPositionBefore(i)),o.breakContainer(o.createPositionAfter(i));var a=i.parent,s=a.previousSibling,l=o.createRangeOn(a);o.remove(l),s&&s.nextSibling&&rh(o,s,s.nextSibling),bh(n.attributeOldValue+1,n.range.start,l.start,i,r,e),nh(n.item,i,r,e);var u=!0,c=!1,f=void 0;try{for(var 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0!==this.column&&this.column!=this._column}},{key:"_isSpanned",value:function(e,t){return!!this._spannedCells.has(e)&&this._spannedCells.get(e).has(t)}},{key:"_getSpanned",value:function(e,t){return this._spannedCells.get(e).get(t)}},{key:"_recordSpans",value:function(e,t,n,r,i){for(var o=t+1;o<=t+r-1;o++)this._markSpannedCell(e,o,i);for(var a=e+1;a<e+n;a++)for(var s=t;s<=t+r-1;s++)this._markSpannedCell(a,s,i)}},{key:"_markSpannedCell",value:function(e,t,n){this._spannedCells.has(e)||this._spannedCells.set(e,new Map),this._spannedCells.get(e).set(t,n)}}]),e}();function Kh(e){return!!e.getCustomProperty("table")&&oc(e)}function Jh(e){var t=e.getSelectedElement();return t&&Kh(t)?t:null}function Xh(e){var t=qh("table",e.getFirstPosition());return t&&Kh(t.parent)?t.parent:null}function Zh(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return function(t){return t.on("insert:table",(function(t,n,r){var 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i=n.item;if(r.consumable.consume(i,"insert")){var o=i.parent,a=o.parent,s=a.getChildIndex(o),l=new Qh(a,{startRow:s,endRow:s}),u={headingRows:a.getAttribute("headingRows")||0,headingColumns:a.getAttribute("headingColumns")||0},c=!0,f=!1,d=void 0;try{for(var h,p=l[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;if(v.cell===i){var m=r.mapper.toViewElement(o);return void ap(v,u,r.writer.createPositionAt(m,o.getChildIndex(i)),r,e)}}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}))}}function np(){var e=!!(arguments.length>0&&void 0!==arguments[0]?arguments[0]:{}).asWidget;return function(t){return t.on("attribute:headingRows:table",(function(t,n,r){var i=n.item;if(r.consumable.consume(n.item,t.name)){var o=pp(r.mapper.toViewElement(i)),a=n.attributeOldValue,s=n.attributeNewValue;if(s>a){var l=Array.from(i.getChildren()).filter((function(e){return E(e.index,a-1,s)}));hp(l,cp("thead",o,r),r,"end");var u=!0,c=!1,f=void 0;try{for(var d,h=l[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value,v=!0,m=!1,g=void 0;try{for(var y,b=p.getChildren()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0)ip(y.value,"th",r,e)}catch(A){m=!0,g=A}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}dp("tbody",o,r)}else{hp(Array.from(i.getChildren()).filter((function(e){return E(e.index,s-1,a)})).reverse(),cp("tbody",o,r),r,0);var k=new Qh(i,{startRow:s?s-1:s,endRow:a-1}),w={headingRows:i.getAttribute("headingRows")||0,headingColumns:i.getAttribute("headingColumns")||0},_=!0,x=!1,T=void 0;try{for(var C,S=k[Symbol.iterator]();!(_=(C=S.next()).done);_=!0)op(C.value,w,r,e)}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}dp("thead",o,r)}}function E(e,t,n){return e>t&&e<n}}))}}function rp(){var e=!!(arguments.length>0&&void 0!==arguments[0]?arguments[0]:{}).asWidget;return function(t){return 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o=i&&i.asWidget,a=lp(e,t),s=o?lc(r.writer.createEditableElement(a),r.writer):r.writer.createContainerElement(a),l=e.cell,c=l.getChild(0),f=1===l.childCount&&"paragraph"===c.name;if(r.writer.insert(n,s),f&&!u(c.getAttributeKeys()).length){var d=l.getChild(0),h=r.writer.createPositionAt(s,"end");if(r.consumable.consume(d,"insert"),i.asWidget){var p=r.writer.createContainerElement("span");r.mapper.bindElements(d,p),r.writer.insert(h,p),r.mapper.bindElements(l,s)}else r.mapper.bindElements(l,s),r.mapper.bindElements(d,s)}else r.mapper.bindElements(l,s)}function sp(e,t,n,r){r.consumable.consume(e,"insert");var i=r.writer.createContainerElement("tr");r.mapper.bindElements(e,i);var o=e.parent.getAttribute("headingRows")||0,a=o>0&&t>=o?t-o:t,s=r.writer.createPositionAt(n,a);return r.writer.insert(s,i),i}function lp(e,t){var n=e.row,r=e.column,i=t.headingColumns,o=t.headingRows;return o&&o>n?"th":i&&i>r?"th":"td"}function up(e,t){return e<t.headingRows?"thead":"tbody"}function cp(e,t,n){return 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e=this.editor.model,t=qh("tableCell",e.document.selection.getFirstPosition()),n=t.parent,r=n.parent,i=r.getAttribute("headingColumns")||0,o=r.getChildIndex(n),a=u(new Qh(r)),s=a.find((function(e){return e.cell===t})).column;e.change((function(e){i&&o<=i&&e.setAttribute("headingColumns",i-1,r);var t=!0,n=!1,l=void 0;try{for(var u,c=a[Symbol.iterator]();!(t=(u=c.next()).done);t=!0){var f=u.value,d=f.cell,h=f.column,p=f.colspan;h<=s&&p>1&&h+p>s?Wh("colspan",p-1,d,e):h===s&&e.remove(d)}}catch(v){n=!0,l=v}finally{try{t||null==c.return||c.return()}finally{if(n)throw l}}}))}}]),t}(Al),xp=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=qh("tableCell",this.editor.model.document.selection.getFirstPosition()),t=!!e;this.isEnabled=t,this.value=t&&this._isInHeading(e,e.parent.parent)}},{key:"execute",value:function(){var e=arguments.length>0&&void 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r=e.parent,i=r.parent,o=t-r.index,a={},s=parseInt(e.getAttribute("rowspan"))-o;s>1&&(a.rowspan=s);var l=parseInt(e.getAttribute("colspan")||1);l>1&&(a.colspan=l);var c,f=i.getChildIndex(r),d=f+o,h=u(new Qh(i,{startRow:f,endRow:d,includeSpanned:!0})),p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var b=g.value,k=b.row,w=b.column,_=b.cell,x=b.cellIndex;if(_===e&&void 0===c&&(c=w),void 0!==c&&c===w&&k===d){var T=i.getChild(k),C=n.createPositionAt(T,x);Yh(n,C,a)}}}catch(S){v=!0,m=S}finally{try{p||null==y.return||y.return()}finally{if(v)throw m}}Wh("rowspan",o,e,n)}var Cp=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=qh("tableCell",this.editor.model.document.selection.getFirstPosition()),t=!!e;this.isEnabled=t,this.value=t&&this._isInHeading(e,e.parent.parent)}},{key:"execute",value:function(){var e=arguments.length>0&&void 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p=d.value;if("thead"===p.parent.name&&p.parent===t)n.headingRows++,r.push(p);else{i.push(p);var v=Gh(p);v>n.headingColumns&&(n.headingColumns=v)}}}catch(m){c=!0,f=m}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}}return n.rows=[].concat(r,i),n}(r),o=i.rows,a=i.headingRows,s=i.headingColumns,l={};s&&(l.headingColumns=s),a&&(l.headingRows=a);var u=n.writer.createElement("table",l),c=n.splitToAllowedParent(u,t.modelCursor);if(c){if(n.writer.insert(u,c.position),n.consumable.consume(r,{name:!0}),o.length)o.forEach((function(e){return n.convertItem(e,n.writer.createPositionAt(u,"end"))}));else{var f=n.writer.createElement("tableRow");n.writer.insert(f,n.writer.createPositionAt(u,"end")),Yh(n.writer,n.writer.createPositionAt(f,"end"))}t.modelRange=n.writer.createRange(n.writer.createPositionBefore(u),n.writer.createPositionAfter(u)),c.cursorParent?t.modelCursor=n.writer.createPositionAt(c.cursorParent,0):t.modelCursor=t.modelRange.end}}}))})),i.for("editingDowncast").add(Zh({asWidget:!0})),i.for("dataDowncast").add(Zh()),i.for("upcast").elementToElement({model:"tableRow",view:"tr"}),i.for("editingDowncast").add(ep({asWidget:!0})),i.for("dataDowncast").add(ep()),i.for("downcast").add((function(e){return e.on("remove:tableRow",(function(e,t,n){e.stop();var r=n.writer,i=n.mapper,o=i.toViewPosition(t.position).getLastMatchingPosition((function(e){return!e.item.is("tr")})).nodeAfter,a=o.parent,s=r.createRangeOn(o),l=r.remove(s),u=!0,c=!1,f=void 0;try{for(var d,h=r.createRangeIn(l).getItems()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var 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source tree. */ +/** @license React v16.12.0 + * react-is.production.min.js + * + * Copyright (c) Facebook, Inc. and its affiliates. + * + * This source code is licensed under the MIT license found in the + * LICENSE file in the root directory of this source tree. + */ + /*! * jQuery JavaScript Library v3.4.1 * https://jquery.com/ @@ -70,12 +79,3 @@ object-assign * * Date: 2019-04-08 */ - -/** @license React v16.12.0 - * react-is.production.min.js - * - * Copyright (c) Facebook, Inc. and its affiliates. - * - * This source code is licensed under the MIT license found in the - * LICENSE file in the root directory of this source tree. - */ diff --git a/php/react/static/js/2.54356701.chunk.js.map b/php/react/static/js/2.3e36c635.chunk.js.map similarity index 73% rename from php/react/static/js/2.54356701.chunk.js.map rename to php/react/static/js/2.3e36c635.chunk.js.map index 315981c..57e2514 100644 --- a/php/react/static/js/2.54356701.chunk.js.map +++ 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strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react.production.min.js');\n} else {\n module.exports = require('./cjs/react.development.js');\n}\n","import React from \"react\";\nimport { Router } from \"react-router\";\nimport { createBrowserHistory as createHistory } from \"history\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\n/**\n * The public API for a <Router> that uses HTML5 history.\n */\nclass BrowserRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n BrowserRouter.propTypes = {\n basename: PropTypes.string,\n children: PropTypes.node,\n forceRefresh: PropTypes.bool,\n getUserConfirmation: PropTypes.func,\n keyLength: PropTypes.number\n };\n\n BrowserRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<BrowserRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { BrowserRouter as Router }`.\"\n );\n };\n}\n\nexport default BrowserRouter;\n","import React from \"react\";\nimport { Router } from \"react-router\";\nimport { createHashHistory as createHistory } from \"history\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\n/**\n * The public API for a <Router> that uses window.location.hash.\n */\nclass HashRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n HashRouter.propTypes = {\n basename: PropTypes.string,\n children: PropTypes.node,\n getUserConfirmation: PropTypes.func,\n hashType: PropTypes.oneOf([\"hashbang\", \"noslash\", \"slash\"])\n };\n\n HashRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<HashRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { HashRouter as Router }`.\"\n );\n };\n}\n\nexport default HashRouter;\n","import { createLocation } from \"history\";\n\nexport const resolveToLocation = (to, currentLocation) =>\n typeof to === \"function\" ? to(currentLocation) : to;\n\nexport const normalizeToLocation = (to, currentLocation) => {\n return typeof to === \"string\"\n ? createLocation(to, null, null, currentLocation)\n : to;\n};\n","import React from \"react\";\nimport { __RouterContext as RouterContext } from \"react-router\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport { resolveToLocation, normalizeToLocation } from \"./utils/locationUtils\";\n\n// React 15 compat\nconst forwardRefShim = C => C;\nlet { forwardRef } = React;\nif (typeof forwardRef === \"undefined\") {\n forwardRef = forwardRefShim;\n}\n\nfunction isModifiedEvent(event) {\n return !!(event.metaKey || event.altKey || event.ctrlKey || event.shiftKey);\n}\n\nconst LinkAnchor = forwardRef(\n (\n {\n innerRef, // TODO: deprecate\n navigate,\n onClick,\n ...rest\n },\n forwardedRef\n ) => {\n const { target } = rest;\n\n let props = {\n ...rest,\n onClick: event => {\n try {\n if (onClick) onClick(event);\n } catch (ex) {\n event.preventDefault();\n throw ex;\n }\n\n if (\n !event.defaultPrevented && // onClick prevented default\n event.button === 0 && // ignore everything but left clicks\n (!target || target === \"_self\") && // let browser handle \"target=_blank\" etc.\n !isModifiedEvent(event) // ignore clicks with modifier keys\n ) {\n event.preventDefault();\n navigate();\n }\n }\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.ref = innerRef;\n }\n\n return <a {...props} />;\n }\n);\n\nif (__DEV__) {\n LinkAnchor.displayName = \"LinkAnchor\";\n}\n\n/**\n * The public API for rendering a history-aware <a>.\n */\nconst Link = forwardRef(\n (\n {\n component = LinkAnchor,\n replace,\n to,\n innerRef, // TODO: deprecate\n ...rest\n },\n forwardedRef\n ) => {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Link> outside a <Router>\");\n\n const { history } = context;\n\n const location = normalizeToLocation(\n resolveToLocation(to, context.location),\n context.location\n );\n\n const href = location ? history.createHref(location) : \"\";\n const props = {\n ...rest,\n href,\n navigate() {\n const location = resolveToLocation(to, context.location);\n const method = replace ? history.replace : history.push;\n\n method(location);\n }\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.innerRef = innerRef;\n }\n\n return React.createElement(component, props);\n }}\n </RouterContext.Consumer>\n );\n }\n);\n\nif (__DEV__) {\n const toType = PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.object,\n PropTypes.func\n ]);\n const refType = PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.func,\n PropTypes.shape({ current: PropTypes.any })\n ]);\n\n Link.displayName = \"Link\";\n\n Link.propTypes = {\n innerRef: refType,\n onClick: PropTypes.func,\n replace: PropTypes.bool,\n target: PropTypes.string,\n to: toType.isRequired\n };\n}\n\nexport default Link;\n","import React from \"react\";\nimport { __RouterContext as RouterContext, matchPath } from \"react-router\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport Link from \"./Link\";\nimport { resolveToLocation, normalizeToLocation } from \"./utils/locationUtils\";\n\n// React 15 compat\nconst forwardRefShim = C => C;\nlet { forwardRef } = React;\nif (typeof forwardRef === \"undefined\") {\n forwardRef = forwardRefShim;\n}\n\nfunction joinClassnames(...classnames) {\n return classnames.filter(i => i).join(\" \");\n}\n\n/**\n * A <Link> wrapper that knows if it's \"active\" or not.\n */\nconst NavLink = forwardRef(\n (\n {\n \"aria-current\": ariaCurrent = \"page\",\n activeClassName = \"active\",\n activeStyle,\n className: classNameProp,\n exact,\n isActive: isActiveProp,\n location: locationProp,\n strict,\n style: styleProp,\n to,\n innerRef, // TODO: deprecate\n ...rest\n },\n forwardedRef\n ) => {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <NavLink> outside a <Router>\");\n\n const currentLocation = locationProp || context.location;\n const toLocation = normalizeToLocation(\n resolveToLocation(to, currentLocation),\n currentLocation\n );\n const { pathname: path } = toLocation;\n // Regex taken from: https://github.com/pillarjs/path-to-regexp/blob/master/index.js#L202\n const escapedPath =\n path && path.replace(/([.+*?=^!:${}()[\\]|/\\\\])/g, \"\\\\$1\");\n\n const match = escapedPath\n ? matchPath(currentLocation.pathname, {\n path: escapedPath,\n exact,\n strict\n })\n : null;\n const isActive = !!(isActiveProp\n ? isActiveProp(match, currentLocation)\n : match);\n\n const className = isActive\n ? joinClassnames(classNameProp, activeClassName)\n : classNameProp;\n const style = isActive ? { ...styleProp, ...activeStyle } : styleProp;\n\n const props = {\n \"aria-current\": (isActive && ariaCurrent) || null,\n className,\n style,\n to: toLocation,\n ...rest\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.innerRef = innerRef;\n }\n\n return <Link {...props} />;\n }}\n </RouterContext.Consumer>\n );\n }\n);\n\nif (__DEV__) {\n NavLink.displayName = \"NavLink\";\n\n const ariaCurrentType = PropTypes.oneOf([\n \"page\",\n \"step\",\n \"location\",\n \"date\",\n \"time\",\n \"true\"\n ]);\n\n NavLink.propTypes = {\n ...Link.propTypes,\n \"aria-current\": ariaCurrentType,\n activeClassName: PropTypes.string,\n activeStyle: PropTypes.object,\n className: PropTypes.string,\n exact: PropTypes.bool,\n isActive: PropTypes.func,\n location: PropTypes.object,\n strict: PropTypes.bool,\n style: PropTypes.object\n };\n}\n\nexport default NavLink;\n","export default function _extends() {\n _extends = Object.assign || function (target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i];\n\n for (var key in source) {\n if (Object.prototype.hasOwnProperty.call(source, key)) {\n target[key] = source[key];\n }\n }\n }\n\n return target;\n };\n\n return _extends.apply(this, arguments);\n}","export default function _classCallCheck(instance, Constructor) {\n if (!(instance instanceof Constructor)) {\n throw new TypeError(\"Cannot call a class as a function\");\n }\n}","function _defineProperties(target, props) {\n for (var i = 0; i < props.length; i++) {\n var descriptor = props[i];\n descriptor.enumerable = descriptor.enumerable || false;\n descriptor.configurable = true;\n if (\"value\" in descriptor) descriptor.writable = true;\n Object.defineProperty(target, descriptor.key, descriptor);\n }\n}\n\nexport default function _createClass(Constructor, protoProps, staticProps) {\n if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n if (staticProps) _defineProperties(Constructor, staticProps);\n return Constructor;\n}","export default function _getPrototypeOf(o) {\n _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n return o.__proto__ || Object.getPrototypeOf(o);\n };\n return _getPrototypeOf(o);\n}","function _typeof2(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof2 = function _typeof2(obj) { return typeof obj; }; } else { _typeof2 = function _typeof2(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof2(obj); }\n\nexport default function _typeof(obj) {\n if (typeof Symbol === \"function\" && _typeof2(Symbol.iterator) === \"symbol\") {\n _typeof = function _typeof(obj) {\n return _typeof2(obj);\n };\n } else {\n _typeof = function _typeof(obj) {\n return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : _typeof2(obj);\n };\n }\n\n return _typeof(obj);\n}","import _typeof from \"../../helpers/esm/typeof\";\nimport assertThisInitialized from \"./assertThisInitialized\";\nexport default function _possibleConstructorReturn(self, call) {\n if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n return call;\n }\n\n return assertThisInitialized(self);\n}","export default function _setPrototypeOf(o, p) {\n _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n o.__proto__ = p;\n return o;\n };\n\n return _setPrototypeOf(o, p);\n}","import setPrototypeOf from \"./setPrototypeOf\";\nexport default function _inherits(subClass, superClass) {\n if (typeof superClass !== \"function\" && superClass !== null) {\n throw new TypeError(\"Super expression must either be null or a function\");\n }\n\n subClass.prototype = Object.create(superClass && superClass.prototype, {\n constructor: {\n value: subClass,\n writable: true,\n configurable: true\n }\n });\n if (superClass) setPrototypeOf(subClass, superClass);\n}","export default function _assertThisInitialized(self) {\n if (self === void 0) {\n throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n }\n\n return self;\n}","var isProduction = process.env.NODE_ENV === 'production';\nvar prefix = 'Invariant failed';\nfunction invariant(condition, message) {\n if (condition) {\n return;\n }\n if (isProduction) {\n throw new Error(prefix);\n }\n throw new Error(prefix + \": \" + (message || ''));\n}\n\nexport default invariant;\n","function isAbsolute(pathname) {\n return pathname.charAt(0) === '/';\n}\n\n// About 1.5x faster than the two-arg version of Array#splice()\nfunction spliceOne(list, index) {\n for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1) {\n list[i] = list[k];\n }\n\n list.pop();\n}\n\n// This implementation is based heavily on node's url.parse\nfunction resolvePathname(to, from) {\n if (from === undefined) from = '';\n\n var toParts = (to && to.split('/')) || [];\n var fromParts = (from && from.split('/')) || [];\n\n var isToAbs = to && isAbsolute(to);\n var isFromAbs = from && isAbsolute(from);\n var mustEndAbs = isToAbs || isFromAbs;\n\n if (to && isAbsolute(to)) {\n // to is absolute\n fromParts = toParts;\n } else if (toParts.length) {\n // to is relative, drop the filename\n fromParts.pop();\n fromParts = fromParts.concat(toParts);\n }\n\n if (!fromParts.length) return '/';\n\n var hasTrailingSlash;\n if (fromParts.length) {\n var last = fromParts[fromParts.length - 1];\n hasTrailingSlash = last === '.' || last === '..' || last === '';\n } else {\n hasTrailingSlash = false;\n }\n\n var up = 0;\n for (var i = fromParts.length; i >= 0; i--) {\n var part = fromParts[i];\n\n if (part === '.') {\n spliceOne(fromParts, i);\n } else if (part === '..') {\n spliceOne(fromParts, i);\n up++;\n } else if (up) {\n spliceOne(fromParts, i);\n up--;\n }\n }\n\n if (!mustEndAbs) for (; up--; up) fromParts.unshift('..');\n\n if (\n mustEndAbs &&\n fromParts[0] !== '' &&\n (!fromParts[0] || !isAbsolute(fromParts[0]))\n )\n fromParts.unshift('');\n\n var result = fromParts.join('/');\n\n if (hasTrailingSlash && result.substr(-1) !== '/') result += '/';\n\n return result;\n}\n\nexport default resolvePathname;\n","function valueOf(obj) {\n return obj.valueOf ? obj.valueOf() : Object.prototype.valueOf.call(obj);\n}\n\nfunction valueEqual(a, b) {\n // Test for strict equality first.\n if (a === b) return true;\n\n // Otherwise, if either of them == null they are not equal.\n if (a == null || b == null) return false;\n\n if (Array.isArray(a)) {\n return (\n Array.isArray(b) &&\n a.length === b.length &&\n a.every(function(item, index) {\n return valueEqual(item, b[index]);\n })\n );\n }\n\n if (typeof a === 'object' || typeof b === 'object') {\n var aValue = valueOf(a);\n var bValue = valueOf(b);\n\n if (aValue !== a || bValue !== b) return valueEqual(aValue, bValue);\n\n return Object.keys(Object.assign({}, a, b)).every(function(key) {\n return valueEqual(a[key], b[key]);\n });\n }\n\n return false;\n}\n\nexport default valueEqual;\n","import _extends from '@babel/runtime/helpers/esm/extends';\nimport resolvePathname from 'resolve-pathname';\nimport valueEqual from 'value-equal';\nimport warning from 'tiny-warning';\nimport invariant from 'tiny-invariant';\n\nfunction addLeadingSlash(path) {\n return path.charAt(0) === '/' ? path : '/' + path;\n}\nfunction stripLeadingSlash(path) {\n return path.charAt(0) === '/' ? path.substr(1) : path;\n}\nfunction hasBasename(path, prefix) {\n return path.toLowerCase().indexOf(prefix.toLowerCase()) === 0 && '/?#'.indexOf(path.charAt(prefix.length)) !== -1;\n}\nfunction stripBasename(path, prefix) {\n return hasBasename(path, prefix) ? path.substr(prefix.length) : path;\n}\nfunction stripTrailingSlash(path) {\n return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;\n}\nfunction parsePath(path) {\n var pathname = path || '/';\n var search = '';\n var hash = '';\n var hashIndex = pathname.indexOf('#');\n\n if (hashIndex !== -1) {\n hash = pathname.substr(hashIndex);\n pathname = pathname.substr(0, hashIndex);\n }\n\n var searchIndex = pathname.indexOf('?');\n\n if (searchIndex !== -1) {\n search = pathname.substr(searchIndex);\n pathname = pathname.substr(0, searchIndex);\n }\n\n return {\n pathname: pathname,\n search: search === '?' ? '' : search,\n hash: hash === '#' ? '' : hash\n };\n}\nfunction createPath(location) {\n var pathname = location.pathname,\n search = location.search,\n hash = location.hash;\n var path = pathname || '/';\n if (search && search !== '?') path += search.charAt(0) === '?' ? search : \"?\" + search;\n if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : \"#\" + hash;\n return path;\n}\n\nfunction createLocation(path, state, key, currentLocation) {\n var location;\n\n if (typeof path === 'string') {\n // Two-arg form: push(path, state)\n location = parsePath(path);\n location.state = state;\n } else {\n // One-arg form: push(location)\n location = _extends({}, path);\n if (location.pathname === undefined) location.pathname = '';\n\n if (location.search) {\n if (location.search.charAt(0) !== '?') location.search = '?' + location.search;\n } else {\n location.search = '';\n }\n\n if (location.hash) {\n if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;\n } else {\n location.hash = '';\n }\n\n if (state !== undefined && location.state === undefined) location.state = state;\n }\n\n try {\n location.pathname = decodeURI(location.pathname);\n } catch (e) {\n if (e instanceof URIError) {\n throw new URIError('Pathname \"' + location.pathname + '\" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');\n } else {\n throw e;\n }\n }\n\n if (key) location.key = key;\n\n if (currentLocation) {\n // Resolve incomplete/relative pathname relative to current location.\n if (!location.pathname) {\n location.pathname = currentLocation.pathname;\n } else if (location.pathname.charAt(0) !== '/') {\n location.pathname = resolvePathname(location.pathname, currentLocation.pathname);\n }\n } else {\n // When there is no prior location and pathname is empty, set it to /\n if (!location.pathname) {\n location.pathname = '/';\n }\n }\n\n return location;\n}\nfunction locationsAreEqual(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);\n}\n\nfunction createTransitionManager() {\n var prompt = null;\n\n function setPrompt(nextPrompt) {\n process.env.NODE_ENV !== \"production\" ? warning(prompt == null, 'A history supports only one prompt at a time') : void 0;\n prompt = nextPrompt;\n return function () {\n if (prompt === nextPrompt) prompt = null;\n };\n }\n\n function confirmTransitionTo(location, action, getUserConfirmation, callback) {\n // TODO: If another transition starts while we're still confirming\n // the previous one, we may end up in a weird state. Figure out the\n // best way to handle this.\n if (prompt != null) {\n var result = typeof prompt === 'function' ? prompt(location, action) : prompt;\n\n if (typeof result === 'string') {\n if (typeof getUserConfirmation === 'function') {\n getUserConfirmation(result, callback);\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'A history needs a getUserConfirmation function in order to use a prompt message') : void 0;\n callback(true);\n }\n } else {\n // Return false from a transition hook to cancel the transition.\n callback(result !== false);\n }\n } else {\n callback(true);\n }\n }\n\n var listeners = [];\n\n function appendListener(fn) {\n var isActive = true;\n\n function listener() {\n if (isActive) fn.apply(void 0, arguments);\n }\n\n listeners.push(listener);\n return function () {\n isActive = false;\n listeners = listeners.filter(function (item) {\n return item !== listener;\n });\n };\n }\n\n function notifyListeners() {\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n listeners.forEach(function (listener) {\n return listener.apply(void 0, args);\n });\n }\n\n return {\n setPrompt: setPrompt,\n confirmTransitionTo: confirmTransitionTo,\n appendListener: appendListener,\n notifyListeners: notifyListeners\n };\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);\nfunction getConfirmation(message, callback) {\n callback(window.confirm(message)); // eslint-disable-line no-alert\n}\n/**\n * Returns true if the HTML5 history API is supported. Taken from Modernizr.\n *\n * https://github.com/Modernizr/Modernizr/blob/master/LICENSE\n * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js\n * changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586\n */\n\nfunction supportsHistory() {\n var ua = window.navigator.userAgent;\n if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;\n return window.history && 'pushState' in window.history;\n}\n/**\n * Returns true if browser fires popstate on hash change.\n * IE10 and IE11 do not.\n */\n\nfunction supportsPopStateOnHashChange() {\n return window.navigator.userAgent.indexOf('Trident') === -1;\n}\n/**\n * Returns false if using go(n) with hash history causes a full page reload.\n */\n\nfunction supportsGoWithoutReloadUsingHash() {\n return window.navigator.userAgent.indexOf('Firefox') === -1;\n}\n/**\n * Returns true if a given popstate event is an extraneous WebKit event.\n * Accounts for the fact that Chrome on iOS fires real popstate events\n * containing undefined state when pressing the back button.\n */\n\nfunction isExtraneousPopstateEvent(event) {\n return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;\n}\n\nvar PopStateEvent = 'popstate';\nvar HashChangeEvent = 'hashchange';\n\nfunction getHistoryState() {\n try {\n return window.history.state || {};\n } catch (e) {\n // IE 11 sometimes throws when accessing window.history.state\n // See https://github.com/ReactTraining/history/pull/289\n return {};\n }\n}\n/**\n * Creates a history object that uses the HTML5 history API including\n * pushState, replaceState, and the popstate event.\n */\n\n\nfunction createBrowserHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Browser history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canUseHistory = supportsHistory();\n var needsHashChangeListener = !supportsPopStateOnHashChange();\n var _props = props,\n _props$forceRefresh = _props.forceRefresh,\n forceRefresh = _props$forceRefresh === void 0 ? false : _props$forceRefresh,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n\n function getDOMLocation(historyState) {\n var _ref = historyState || {},\n key = _ref.key,\n state = _ref.state;\n\n var _window$location = window.location,\n pathname = _window$location.pathname,\n search = _window$location.search,\n hash = _window$location.hash;\n var path = pathname + search + hash;\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path, state, key);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function handlePopState(event) {\n // Ignore extraneous popstate events in WebKit.\n if (isExtraneousPopstateEvent(event)) return;\n handlePop(getDOMLocation(event.state));\n }\n\n function handleHashChange() {\n handlePop(getDOMLocation(getHistoryState()));\n }\n\n var forceNextPop = false;\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of keys we've seen in sessionStorage.\n // Instead, we just default to 0 for keys we don't know.\n\n var toIndex = allKeys.indexOf(toLocation.key);\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allKeys.indexOf(fromLocation.key);\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n }\n\n var initialLocation = getDOMLocation(getHistoryState());\n var allKeys = [initialLocation.key]; // Public interface\n\n function createHref(location) {\n return basename + createPath(location);\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.pushState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.href = href;\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n var nextKeys = allKeys.slice(0, prevIndex + 1);\n nextKeys.push(location.key);\n allKeys = nextKeys;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history') : void 0;\n window.location.href = href;\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.replaceState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.replace(href);\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n if (prevIndex !== -1) allKeys[prevIndex] = location.key;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history') : void 0;\n window.location.replace(href);\n }\n });\n }\n\n function go(n) {\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.addEventListener(HashChangeEvent, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.removeEventListener(HashChangeEvent, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nvar HashChangeEvent$1 = 'hashchange';\nvar HashPathCoders = {\n hashbang: {\n encodePath: function encodePath(path) {\n return path.charAt(0) === '!' ? path : '!/' + stripLeadingSlash(path);\n },\n decodePath: function decodePath(path) {\n return path.charAt(0) === '!' ? path.substr(1) : path;\n }\n },\n noslash: {\n encodePath: stripLeadingSlash,\n decodePath: addLeadingSlash\n },\n slash: {\n encodePath: addLeadingSlash,\n decodePath: addLeadingSlash\n }\n};\n\nfunction stripHash(url) {\n var hashIndex = url.indexOf('#');\n return hashIndex === -1 ? url : url.slice(0, hashIndex);\n}\n\nfunction getHashPath() {\n // We can't use window.location.hash here because it's not\n // consistent across browsers - Firefox will pre-decode it!\n var href = window.location.href;\n var hashIndex = href.indexOf('#');\n return hashIndex === -1 ? '' : href.substring(hashIndex + 1);\n}\n\nfunction pushHashPath(path) {\n window.location.hash = path;\n}\n\nfunction replaceHashPath(path) {\n window.location.replace(stripHash(window.location.href) + '#' + path);\n}\n\nfunction createHashHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Hash history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canGoWithoutReload = supportsGoWithoutReloadUsingHash();\n var _props = props,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$hashType = _props.hashType,\n hashType = _props$hashType === void 0 ? 'slash' : _props$hashType;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n var _HashPathCoders$hashT = HashPathCoders[hashType],\n encodePath = _HashPathCoders$hashT.encodePath,\n decodePath = _HashPathCoders$hashT.decodePath;\n\n function getDOMLocation() {\n var path = decodePath(getHashPath());\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n var forceNextPop = false;\n var ignorePath = null;\n\n function locationsAreEqual$$1(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash;\n }\n\n function handleHashChange() {\n var path = getHashPath();\n var encodedPath = encodePath(path);\n\n if (path !== encodedPath) {\n // Ensure we always have a properly-encoded hash.\n replaceHashPath(encodedPath);\n } else {\n var location = getDOMLocation();\n var prevLocation = history.location;\n if (!forceNextPop && locationsAreEqual$$1(prevLocation, location)) return; // A hashchange doesn't always == location change.\n\n if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.\n\n ignorePath = null;\n handlePop(location);\n }\n }\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of paths we've seen in sessionStorage.\n // Instead, we just default to 0 for paths we don't know.\n\n var toIndex = allPaths.lastIndexOf(createPath(toLocation));\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n } // Ensure the hash is encoded properly before doing anything else.\n\n\n var path = getHashPath();\n var encodedPath = encodePath(path);\n if (path !== encodedPath) replaceHashPath(encodedPath);\n var initialLocation = getDOMLocation();\n var allPaths = [createPath(initialLocation)]; // Public interface\n\n function createHref(location) {\n var baseTag = document.querySelector('base');\n var href = '';\n\n if (baseTag && baseTag.getAttribute('href')) {\n href = stripHash(window.location.href);\n }\n\n return href + '#' + encodePath(basename + createPath(location));\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot push state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a PUSH, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n pushHashPath(encodedPath);\n var prevIndex = allPaths.lastIndexOf(createPath(history.location));\n var nextPaths = allPaths.slice(0, prevIndex + 1);\n nextPaths.push(path);\n allPaths = nextPaths;\n setState({\n action: action,\n location: location\n });\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack') : void 0;\n setState();\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot replace state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a REPLACE, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n replaceHashPath(encodedPath);\n }\n\n var prevIndex = allPaths.indexOf(createPath(history.location));\n if (prevIndex !== -1) allPaths[prevIndex] = path;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n process.env.NODE_ENV !== \"production\" ? warning(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser') : void 0;\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(HashChangeEvent$1, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(HashChangeEvent$1, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nfunction clamp(n, lowerBound, upperBound) {\n return Math.min(Math.max(n, lowerBound), upperBound);\n}\n/**\n * Creates a history object that stores locations in memory.\n */\n\n\nfunction createMemoryHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n var _props = props,\n getUserConfirmation = _props.getUserConfirmation,\n _props$initialEntries = _props.initialEntries,\n initialEntries = _props$initialEntries === void 0 ? ['/'] : _props$initialEntries,\n _props$initialIndex = _props.initialIndex,\n initialIndex = _props$initialIndex === void 0 ? 0 : _props$initialIndex,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = history.entries.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var index = clamp(initialIndex, 0, initialEntries.length - 1);\n var entries = initialEntries.map(function (entry) {\n return typeof entry === 'string' ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key || createKey());\n }); // Public interface\n\n var createHref = createPath;\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var prevIndex = history.index;\n var nextIndex = prevIndex + 1;\n var nextEntries = history.entries.slice(0);\n\n if (nextEntries.length > nextIndex) {\n nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);\n } else {\n nextEntries.push(location);\n }\n\n setState({\n action: action,\n location: location,\n index: nextIndex,\n entries: nextEntries\n });\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n history.entries[history.index] = location;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);\n var action = 'POP';\n var location = history.entries[nextIndex];\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location,\n index: nextIndex\n });\n } else {\n // Mimic the behavior of DOM histories by\n // causing a render after a cancelled POP.\n setState();\n }\n });\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n function canGo(n) {\n var nextIndex = history.index + n;\n return nextIndex >= 0 && nextIndex < history.entries.length;\n }\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n return transitionManager.setPrompt(prompt);\n }\n\n function listen(listener) {\n return transitionManager.appendListener(listener);\n }\n\n var history = {\n length: entries.length,\n action: 'POP',\n location: entries[index],\n index: index,\n entries: entries,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n canGo: canGo,\n block: block,\n listen: listen\n };\n return history;\n}\n\nexport { createBrowserHistory, createHashHistory, createMemoryHistory, createLocation, locationsAreEqual, parsePath, createPath };\n","export default function _inheritsLoose(subClass, superClass) {\n subClass.prototype = Object.create(superClass.prototype);\n subClass.prototype.constructor = subClass;\n subClass.__proto__ = superClass;\n}","import React, { Component } from 'react';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport PropTypes from 'prop-types';\nimport gud from 'gud';\nimport warning from 'tiny-warning';\n\nvar MAX_SIGNED_31_BIT_INT = 1073741823;\n\nfunction objectIs(x, y) {\n if (x === y) {\n return x !== 0 || 1 / x === 1 / y;\n } else {\n return x !== x && y !== y;\n }\n}\n\nfunction createEventEmitter(value) {\n var handlers = [];\n return {\n on: function on(handler) {\n handlers.push(handler);\n },\n off: function off(handler) {\n handlers = handlers.filter(function (h) {\n return h !== handler;\n });\n },\n get: function get() {\n return value;\n },\n set: function set(newValue, changedBits) {\n value = newValue;\n handlers.forEach(function (handler) {\n return handler(value, changedBits);\n });\n }\n };\n}\n\nfunction onlyChild(children) {\n return Array.isArray(children) ? children[0] : children;\n}\n\nfunction createReactContext(defaultValue, calculateChangedBits) {\n var _Provider$childContex, _Consumer$contextType;\n\n var contextProp = '__create-react-context-' + gud() + '__';\n\n var Provider =\n /*#__PURE__*/\n function (_Component) {\n _inheritsLoose(Provider, _Component);\n\n function Provider() {\n var _this;\n\n _this = _Component.apply(this, arguments) || this;\n _this.emitter = createEventEmitter(_this.props.value);\n return _this;\n }\n\n var _proto = Provider.prototype;\n\n _proto.getChildContext = function getChildContext() {\n var _ref;\n\n return _ref = {}, _ref[contextProp] = this.emitter, _ref;\n };\n\n _proto.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n if (this.props.value !== nextProps.value) {\n var oldValue = this.props.value;\n var newValue = nextProps.value;\n var changedBits;\n\n if (objectIs(oldValue, newValue)) {\n changedBits = 0;\n } else {\n changedBits = typeof calculateChangedBits === 'function' ? calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;\n\n if (process.env.NODE_ENV !== 'production') {\n warning((changedBits & MAX_SIGNED_31_BIT_INT) === changedBits, 'calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: ' + changedBits);\n }\n\n changedBits |= 0;\n\n if (changedBits !== 0) {\n this.emitter.set(nextProps.value, changedBits);\n }\n }\n }\n };\n\n _proto.render = function render() {\n return this.props.children;\n };\n\n return Provider;\n }(Component);\n\n Provider.childContextTypes = (_Provider$childContex = {}, _Provider$childContex[contextProp] = PropTypes.object.isRequired, _Provider$childContex);\n\n var Consumer =\n /*#__PURE__*/\n function (_Component2) {\n _inheritsLoose(Consumer, _Component2);\n\n function Consumer() {\n var _this2;\n\n _this2 = _Component2.apply(this, arguments) || this;\n _this2.state = {\n value: _this2.getValue()\n };\n\n _this2.onUpdate = function (newValue, changedBits) {\n var observedBits = _this2.observedBits | 0;\n\n if ((observedBits & changedBits) !== 0) {\n _this2.setState({\n value: _this2.getValue()\n });\n }\n };\n\n return _this2;\n }\n\n var _proto2 = Consumer.prototype;\n\n _proto2.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n var observedBits = nextProps.observedBits;\n this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n };\n\n _proto2.componentDidMount = function componentDidMount() {\n if (this.context[contextProp]) {\n this.context[contextProp].on(this.onUpdate);\n }\n\n var observedBits = this.props.observedBits;\n this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n };\n\n _proto2.componentWillUnmount = function componentWillUnmount() {\n if (this.context[contextProp]) {\n this.context[contextProp].off(this.onUpdate);\n }\n };\n\n _proto2.getValue = function getValue() {\n if (this.context[contextProp]) {\n return this.context[contextProp].get();\n } else {\n return defaultValue;\n }\n };\n\n _proto2.render = function render() {\n return onlyChild(this.props.children)(this.state.value);\n };\n\n return Consumer;\n }(Component);\n\n Consumer.contextTypes = (_Consumer$contextType = {}, _Consumer$contextType[contextProp] = PropTypes.object, _Consumer$contextType);\n return {\n Provider: Provider,\n Consumer: Consumer\n };\n}\n\nvar index = React.createContext || createReactContext;\n\nexport default index;\n","// TODO: Replace with React.createContext once we can assume React 16+\nimport createContext from \"mini-create-react-context\";\n\nconst createNamedContext = name => {\n const context = createContext();\n context.displayName = name;\n\n return context;\n};\n\nconst context = /*#__PURE__*/ createNamedContext(\"Router\");\nexport default context;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\n\n/**\n * The public API for putting history on context.\n */\nclass Router extends React.Component {\n static computeRootMatch(pathname) {\n return { path: \"/\", url: \"/\", params: {}, isExact: pathname === \"/\" };\n }\n\n constructor(props) {\n super(props);\n\n this.state = {\n location: props.history.location\n };\n\n // This is a bit of a hack. We have to start listening for location\n // changes here in the constructor in case there are any <Redirect>s\n // on the initial render. If there are, they will replace/push when\n // they mount and since cDM fires in children before parents, we may\n // get a new location before the <Router> is mounted.\n this._isMounted = false;\n this._pendingLocation = null;\n\n if (!props.staticContext) {\n this.unlisten = props.history.listen(location => {\n if (this._isMounted) {\n this.setState({ location });\n } else {\n this._pendingLocation = location;\n }\n });\n }\n }\n\n componentDidMount() {\n this._isMounted = true;\n\n if (this._pendingLocation) {\n this.setState({ location: this._pendingLocation });\n }\n }\n\n componentWillUnmount() {\n if (this.unlisten) this.unlisten();\n }\n\n render() {\n return (\n <RouterContext.Provider\n children={this.props.children || null}\n value={{\n history: this.props.history,\n location: this.state.location,\n match: Router.computeRootMatch(this.state.location.pathname),\n staticContext: this.props.staticContext\n }}\n />\n );\n }\n}\n\nif (__DEV__) {\n Router.propTypes = {\n children: PropTypes.node,\n history: PropTypes.object.isRequired,\n staticContext: PropTypes.object\n };\n\n Router.prototype.componentDidUpdate = function(prevProps) {\n warning(\n prevProps.history === this.props.history,\n \"You cannot change <Router history>\"\n );\n };\n}\n\nexport default Router;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createMemoryHistory as createHistory } from \"history\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router\";\n\n/**\n * The public API for a <Router> that stores location in memory.\n */\nclass MemoryRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n MemoryRouter.propTypes = {\n initialEntries: PropTypes.array,\n initialIndex: PropTypes.number,\n getUserConfirmation: PropTypes.func,\n keyLength: PropTypes.number,\n children: PropTypes.node\n };\n\n MemoryRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<MemoryRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { MemoryRouter as Router }`.\"\n );\n };\n}\n\nexport default MemoryRouter;\n","import React from \"react\";\n\nclass Lifecycle extends React.Component {\n componentDidMount() {\n if (this.props.onMount) this.props.onMount.call(this, this);\n }\n\n componentDidUpdate(prevProps) {\n if (this.props.onUpdate) this.props.onUpdate.call(this, this, prevProps);\n }\n\n componentWillUnmount() {\n if (this.props.onUnmount) this.props.onUnmount.call(this, this);\n }\n\n render() {\n return null;\n }\n}\n\nexport default Lifecycle;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path) {\n if (cache[path]) return cache[path];\n\n const generator = pathToRegexp.compile(path);\n\n if (cacheCount < cacheLimit) {\n cache[path] = generator;\n cacheCount++;\n }\n\n return generator;\n}\n\n/**\n * Public API for generating a URL pathname from a path and parameters.\n */\nfunction generatePath(path = \"/\", params = {}) {\n return path === \"/\" ? path : compilePath(path)(params, { pretty: true });\n}\n\nexport default generatePath;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, locationsAreEqual } from \"history\";\nimport invariant from \"tiny-invariant\";\n\nimport Lifecycle from \"./Lifecycle\";\nimport RouterContext from \"./RouterContext\";\nimport generatePath from \"./generatePath\";\n\n/**\n * The public API for navigating programmatically with a component.\n */\nfunction Redirect({ computedMatch, to, push = false }) {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Redirect> outside a <Router>\");\n\n const { history, staticContext } = context;\n\n const method = push ? history.push : history.replace;\n const location = createLocation(\n computedMatch\n ? typeof to === \"string\"\n ? generatePath(to, computedMatch.params)\n : {\n ...to,\n pathname: generatePath(to.pathname, computedMatch.params)\n }\n : to\n );\n\n // When rendering in a static context,\n // set the new location immediately.\n if (staticContext) {\n method(location);\n return null;\n }\n\n return (\n <Lifecycle\n onMount={() => {\n method(location);\n }}\n onUpdate={(self, prevProps) => {\n const prevLocation = createLocation(prevProps.to);\n if (\n !locationsAreEqual(prevLocation, {\n ...location,\n key: prevLocation.key\n })\n ) {\n method(location);\n }\n }}\n to={to}\n />\n );\n }}\n </RouterContext.Consumer>\n );\n}\n\nif (__DEV__) {\n Redirect.propTypes = {\n push: PropTypes.bool,\n from: PropTypes.string,\n to: PropTypes.oneOfType([PropTypes.string, PropTypes.object]).isRequired\n };\n}\n\nexport default Redirect;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path, options) {\n const cacheKey = `${options.end}${options.strict}${options.sensitive}`;\n const pathCache = cache[cacheKey] || (cache[cacheKey] = {});\n\n if (pathCache[path]) return pathCache[path];\n\n const keys = [];\n const regexp = pathToRegexp(path, keys, options);\n const result = { regexp, keys };\n\n if (cacheCount < cacheLimit) {\n pathCache[path] = result;\n cacheCount++;\n }\n\n return result;\n}\n\n/**\n * Public API for matching a URL pathname to a path.\n */\nfunction matchPath(pathname, options = {}) {\n if (typeof options === \"string\" || Array.isArray(options)) {\n options = { path: options };\n }\n\n const { path, exact = false, strict = false, sensitive = false } = options;\n\n const paths = [].concat(path);\n\n return paths.reduce((matched, path) => {\n if (!path && path !== \"\") return null;\n if (matched) return matched;\n\n const { regexp, keys } = compilePath(path, {\n end: exact,\n strict,\n sensitive\n });\n const match = regexp.exec(pathname);\n\n if (!match) return null;\n\n const [url, ...values] = match;\n const isExact = pathname === url;\n\n if (exact && !isExact) return null;\n\n return {\n path, // the path used to match\n url: path === \"/\" && url === \"\" ? \"/\" : url, // the matched portion of the URL\n isExact, // whether or not we matched exactly\n params: keys.reduce((memo, key, index) => {\n memo[key.name] = values[index];\n return memo;\n }, {})\n };\n }, null);\n}\n\nexport default matchPath;\n","import React from \"react\";\nimport { isValidElementType } from \"react-is\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\nimport matchPath from \"./matchPath\";\n\nfunction isEmptyChildren(children) {\n return React.Children.count(children) === 0;\n}\n\nfunction evalChildrenDev(children, props, path) {\n const value = children(props);\n\n warning(\n value !== undefined,\n \"You returned `undefined` from the `children` function of \" +\n `<Route${path ? ` path=\"${path}\"` : \"\"}>, but you ` +\n \"should have returned a React element or `null`\"\n );\n\n return value || null;\n}\n\n/**\n * The public API for matching a single path and rendering.\n */\nclass Route extends React.Component {\n render() {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Route> outside a <Router>\");\n\n const location = this.props.location || context.location;\n const match = this.props.computedMatch\n ? this.props.computedMatch // <Switch> already computed the match for us\n : this.props.path\n ? matchPath(location.pathname, this.props)\n : context.match;\n\n const props = { ...context, location, match };\n\n let { children, component, render } = this.props;\n\n // Preact uses an empty array as children by\n // default, so use null if that's the case.\n if (Array.isArray(children) && children.length === 0) {\n children = null;\n }\n\n return (\n <RouterContext.Provider value={props}>\n {props.match\n ? children\n ? typeof children === \"function\"\n ? __DEV__\n ? evalChildrenDev(children, props, this.props.path)\n : children(props)\n : children\n : component\n ? React.createElement(component, props)\n : render\n ? render(props)\n : null\n : typeof children === \"function\"\n ? __DEV__\n ? evalChildrenDev(children, props, this.props.path)\n : children(props)\n : null}\n </RouterContext.Provider>\n );\n }}\n </RouterContext.Consumer>\n );\n }\n}\n\nif (__DEV__) {\n Route.propTypes = {\n children: PropTypes.oneOfType([PropTypes.func, PropTypes.node]),\n component: (props, propName) => {\n if (props[propName] && !isValidElementType(props[propName])) {\n return new Error(\n `Invalid prop 'component' supplied to 'Route': the prop is not a valid React component`\n );\n }\n },\n exact: PropTypes.bool,\n location: PropTypes.object,\n path: PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.arrayOf(PropTypes.string)\n ]),\n render: PropTypes.func,\n sensitive: PropTypes.bool,\n strict: PropTypes.bool\n };\n\n Route.prototype.componentDidMount = function() {\n warning(\n !(\n this.props.children &&\n !isEmptyChildren(this.props.children) &&\n this.props.component\n ),\n \"You should not use <Route component> and <Route children> in the same route; <Route component> will be ignored\"\n );\n\n warning(\n !(\n this.props.children &&\n !isEmptyChildren(this.props.children) &&\n this.props.render\n ),\n \"You should not use <Route render> and <Route children> in the same route; <Route render> will be ignored\"\n );\n\n warning(\n !(this.props.component && this.props.render),\n \"You should not use <Route component> and <Route render> in the same route; <Route render> will be ignored\"\n );\n };\n\n Route.prototype.componentDidUpdate = function(prevProps) {\n warning(\n !(this.props.location && !prevProps.location),\n '<Route> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n );\n\n warning(\n !(!this.props.location && prevProps.location),\n '<Route> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n );\n };\n}\n\nexport default Route;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, createPath } from \"history\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router\";\n\nfunction addLeadingSlash(path) {\n return path.charAt(0) === \"/\" ? path : \"/\" + path;\n}\n\nfunction addBasename(basename, location) {\n if (!basename) return location;\n\n return {\n ...location,\n pathname: addLeadingSlash(basename) + location.pathname\n };\n}\n\nfunction stripBasename(basename, location) {\n if (!basename) return location;\n\n const base = addLeadingSlash(basename);\n\n if (location.pathname.indexOf(base) !== 0) return location;\n\n return {\n ...location,\n pathname: location.pathname.substr(base.length)\n };\n}\n\nfunction createURL(location) {\n return typeof location === \"string\" ? location : createPath(location);\n}\n\nfunction staticHandler(methodName) {\n return () => {\n invariant(false, \"You cannot %s with <StaticRouter>\", methodName);\n };\n}\n\nfunction noop() {}\n\n/**\n * The public top-level API for a \"static\" <Router>, so-called because it\n * can't actually change the current location. Instead, it just records\n * location changes in a context object. Useful mainly in testing and\n * server-rendering scenarios.\n */\nclass StaticRouter extends React.Component {\n navigateTo(location, action) {\n const { basename = \"\", context = {} } = this.props;\n context.action = action;\n context.location = addBasename(basename, createLocation(location));\n context.url = createURL(context.location);\n }\n\n handlePush = location => this.navigateTo(location, \"PUSH\");\n handleReplace = location => this.navigateTo(location, \"REPLACE\");\n handleListen = () => noop;\n handleBlock = () => noop;\n\n render() {\n const { basename = \"\", context = {}, location = \"/\", ...rest } = this.props;\n\n const history = {\n createHref: path => addLeadingSlash(basename + createURL(path)),\n action: \"POP\",\n location: stripBasename(basename, createLocation(location)),\n push: this.handlePush,\n replace: this.handleReplace,\n go: staticHandler(\"go\"),\n goBack: staticHandler(\"goBack\"),\n goForward: staticHandler(\"goForward\"),\n listen: this.handleListen,\n block: this.handleBlock\n };\n\n return <Router {...rest} history={history} staticContext={context} />;\n }\n}\n\nif (__DEV__) {\n StaticRouter.propTypes = {\n basename: PropTypes.string,\n context: PropTypes.object,\n location: PropTypes.oneOfType([PropTypes.string, PropTypes.object])\n };\n\n StaticRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<StaticRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { StaticRouter as Router }`.\"\n );\n };\n}\n\nexport default StaticRouter;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\nimport matchPath from \"./matchPath\";\n\n/**\n * The public API for rendering the first <Route> that matches.\n */\nclass Switch extends React.Component {\n render() {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Switch> outside a <Router>\");\n\n const location = this.props.location || context.location;\n\n let element, match;\n\n // We use React.Children.forEach instead of React.Children.toArray().find()\n // here because toArray adds keys to all child elements and we do not want\n // to trigger an unmount/remount for two <Route>s that render the same\n // component at different URLs.\n React.Children.forEach(this.props.children, child => {\n if (match == null && React.isValidElement(child)) {\n element = child;\n\n const path = child.props.path || child.props.from;\n\n match = path\n ? matchPath(location.pathname, { ...child.props, path })\n : context.match;\n }\n });\n\n return match\n ? React.cloneElement(element, { location, computedMatch: match })\n : null;\n }}\n </RouterContext.Consumer>\n );\n }\n}\n\nif (__DEV__) {\n Switch.propTypes = {\n children: PropTypes.node,\n location: PropTypes.object\n };\n\n Switch.prototype.componentDidUpdate = function(prevProps) {\n warning(\n !(this.props.location && !prevProps.location),\n '<Switch> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n );\n\n warning(\n !(!this.props.location && prevProps.location),\n '<Switch> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n );\n };\n}\n\nexport default Switch;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport RouterContext from \"./RouterContext\";\nimport hoistStatics from \"hoist-non-react-statics\";\nimport invariant from \"tiny-invariant\";\n\n/**\n * A public higher-order component to access the imperative API\n */\nfunction withRouter(Component) {\n const displayName = `withRouter(${Component.displayName || Component.name})`;\n const C = props => {\n const { wrappedComponentRef, ...remainingProps } = props;\n\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(\n context,\n `You should not use <${displayName} /> outside a <Router>`\n );\n return (\n <Component\n {...remainingProps}\n {...context}\n ref={wrappedComponentRef}\n />\n );\n }}\n </RouterContext.Consumer>\n );\n };\n\n C.displayName = displayName;\n C.WrappedComponent = Component;\n\n if (__DEV__) {\n C.propTypes = {\n wrappedComponentRef: PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.func,\n PropTypes.object\n ])\n };\n }\n\n return hoistStatics(C, Component);\n}\n\nexport default withRouter;\n","import React from \"react\";\nimport invariant from \"tiny-invariant\";\n\nimport Context from \"./RouterContext.js\";\nimport matchPath from \"./matchPath.js\";\n\nconst useContext = React.useContext;\n\nexport function useHistory() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useHistory()\"\n );\n }\n\n return useContext(Context).history;\n}\n\nexport function useLocation() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useLocation()\"\n );\n }\n\n return useContext(Context).location;\n}\n\nexport function useParams() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useParams()\"\n );\n }\n\n const match = useContext(Context).match;\n return match ? match.params : {};\n}\n\nexport function useRouteMatch(path) {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useRouteMatch()\"\n );\n }\n\n return path\n ? matchPath(useLocation().pathname, path)\n : useContext(Context).match;\n}\n","export default function _objectWithoutPropertiesLoose(source, excluded) {\n if (source == null) return {};\n var target = {};\n var sourceKeys = Object.keys(source);\n var key, i;\n\n for (i = 0; i < sourceKeys.length; i++) {\n key = sourceKeys[i];\n if (excluded.indexOf(key) >= 0) continue;\n target[key] = source[key];\n }\n\n return target;\n}","/*\n * Toastr\n * Copyright 2012-2015\n * Authors: John Papa, Hans Fjällemark, and Tim Ferrell.\n * All Rights Reserved.\n * Use, reproduction, distribution, and modification of this code is subject to the terms and\n * conditions of the MIT license, available at http://www.opensource.org/licenses/mit-license.php\n *\n * ARIA Support: Greta Krafsig\n *\n * Project: https://github.com/CodeSeven/toastr\n */\n/* global define */\n(function (define) {\n define(['jquery'], function ($) {\n return (function () {\n var $container;\n var listener;\n var toastId = 0;\n var toastType = {\n error: 'error',\n info: 'info',\n success: 'success',\n warning: 'warning'\n };\n\n var toastr = {\n clear: clear,\n remove: remove,\n error: error,\n getContainer: getContainer,\n info: info,\n options: {},\n subscribe: subscribe,\n success: success,\n version: '2.1.4',\n warning: warning\n };\n\n var previousToast;\n\n return toastr;\n\n ////////////////\n\n function error(message, title, optionsOverride) {\n return notify({\n type: toastType.error,\n iconClass: getOptions().iconClasses.error,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function getContainer(options, create) {\n if (!options) { options = getOptions(); }\n $container = $('#' + options.containerId);\n if ($container.length) {\n return $container;\n }\n if (create) {\n $container = createContainer(options);\n }\n return $container;\n }\n\n function info(message, title, optionsOverride) {\n return notify({\n type: toastType.info,\n iconClass: getOptions().iconClasses.info,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function subscribe(callback) {\n listener = callback;\n }\n\n function success(message, title, optionsOverride) {\n return notify({\n type: toastType.success,\n iconClass: getOptions().iconClasses.success,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function warning(message, title, optionsOverride) {\n return notify({\n type: toastType.warning,\n iconClass: getOptions().iconClasses.warning,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function clear($toastElement, clearOptions) {\n var options = getOptions();\n if (!$container) { getContainer(options); }\n if (!clearToast($toastElement, options, clearOptions)) {\n clearContainer(options);\n }\n }\n\n function remove($toastElement) {\n var options = getOptions();\n if (!$container) { getContainer(options); }\n if ($toastElement && $(':focus', $toastElement).length === 0) {\n removeToast($toastElement);\n return;\n }\n if ($container.children().length) {\n $container.remove();\n }\n }\n\n // internal functions\n\n function clearContainer (options) {\n var toastsToClear = $container.children();\n for (var i = toastsToClear.length - 1; i >= 0; i--) {\n clearToast($(toastsToClear[i]), options);\n }\n }\n\n function clearToast ($toastElement, options, clearOptions) {\n var force = clearOptions && clearOptions.force ? clearOptions.force : false;\n if ($toastElement && (force || $(':focus', $toastElement).length === 0)) {\n $toastElement[options.hideMethod]({\n duration: options.hideDuration,\n easing: options.hideEasing,\n complete: function () { removeToast($toastElement); }\n });\n return true;\n }\n return false;\n }\n\n function createContainer(options) {\n $container = $('<div/>')\n .attr('id', options.containerId)\n .addClass(options.positionClass);\n\n $container.appendTo($(options.target));\n return $container;\n }\n\n function getDefaults() {\n return {\n tapToDismiss: true,\n toastClass: 'toast',\n containerId: 'toast-container',\n debug: false,\n\n showMethod: 'fadeIn', //fadeIn, slideDown, and show are built into jQuery\n showDuration: 300,\n showEasing: 'swing', //swing and linear are built into jQuery\n onShown: undefined,\n hideMethod: 'fadeOut',\n hideDuration: 1000,\n hideEasing: 'swing',\n onHidden: undefined,\n closeMethod: false,\n closeDuration: false,\n closeEasing: false,\n closeOnHover: true,\n\n extendedTimeOut: 1000,\n iconClasses: {\n error: 'toast-error',\n info: 'toast-info',\n success: 'toast-success',\n warning: 'toast-warning'\n },\n iconClass: 'toast-info',\n positionClass: 'toast-top-right',\n timeOut: 5000, // Set timeOut and extendedTimeOut to 0 to make it sticky\n titleClass: 'toast-title',\n messageClass: 'toast-message',\n escapeHtml: false,\n target: 'body',\n closeHtml: '<button type=\"button\">×</button>',\n closeClass: 'toast-close-button',\n newestOnTop: true,\n preventDuplicates: false,\n progressBar: false,\n progressClass: 'toast-progress',\n rtl: false\n };\n }\n\n function publish(args) {\n if (!listener) { return; }\n listener(args);\n }\n\n function notify(map) {\n var options = getOptions();\n var iconClass = map.iconClass || options.iconClass;\n\n if (typeof (map.optionsOverride) !== 'undefined') {\n options = $.extend(options, map.optionsOverride);\n iconClass = map.optionsOverride.iconClass || iconClass;\n }\n\n if (shouldExit(options, map)) { return; }\n\n toastId++;\n\n $container = getContainer(options, true);\n\n var intervalId = null;\n var $toastElement = $('<div/>');\n var $titleElement = $('<div/>');\n var $messageElement = $('<div/>');\n var $progressElement = $('<div/>');\n var $closeElement = $(options.closeHtml);\n var progressBar = {\n intervalId: null,\n hideEta: null,\n maxHideTime: null\n };\n var response = {\n toastId: toastId,\n state: 'visible',\n startTime: new Date(),\n options: options,\n map: map\n };\n\n personalizeToast();\n\n displayToast();\n\n handleEvents();\n\n publish(response);\n\n if (options.debug && console) {\n console.log(response);\n }\n\n return $toastElement;\n\n function escapeHtml(source) {\n if (source == null) {\n source = '';\n }\n\n return source\n .replace(/&/g, '&')\n .replace(/\"/g, '"')\n .replace(/'/g, ''')\n .replace(/</g, '<')\n .replace(/>/g, '>');\n }\n\n function personalizeToast() {\n setIcon();\n setTitle();\n setMessage();\n setCloseButton();\n setProgressBar();\n setRTL();\n setSequence();\n setAria();\n }\n\n function setAria() {\n var ariaValue = '';\n switch (map.iconClass) {\n case 'toast-success':\n case 'toast-info':\n ariaValue = 'polite';\n break;\n default:\n ariaValue = 'assertive';\n }\n $toastElement.attr('aria-live', ariaValue);\n }\n\n function handleEvents() {\n if (options.closeOnHover) {\n $toastElement.hover(stickAround, delayedHideToast);\n }\n\n if (!options.onclick && options.tapToDismiss) {\n $toastElement.click(hideToast);\n }\n\n if (options.closeButton && $closeElement) {\n $closeElement.click(function (event) {\n if (event.stopPropagation) {\n event.stopPropagation();\n } else if (event.cancelBubble !== undefined && event.cancelBubble !== true) {\n event.cancelBubble = true;\n }\n\n if (options.onCloseClick) {\n options.onCloseClick(event);\n }\n\n hideToast(true);\n });\n }\n\n if (options.onclick) {\n $toastElement.click(function (event) {\n options.onclick(event);\n hideToast();\n });\n }\n }\n\n function displayToast() {\n $toastElement.hide();\n\n $toastElement[options.showMethod](\n {duration: options.showDuration, easing: options.showEasing, complete: options.onShown}\n );\n\n if (options.timeOut > 0) {\n intervalId = setTimeout(hideToast, options.timeOut);\n progressBar.maxHideTime = parseFloat(options.timeOut);\n progressBar.hideEta = new Date().getTime() + progressBar.maxHideTime;\n if (options.progressBar) {\n progressBar.intervalId = setInterval(updateProgress, 10);\n }\n }\n }\n\n function setIcon() {\n if (map.iconClass) {\n $toastElement.addClass(options.toastClass).addClass(iconClass);\n }\n }\n\n function setSequence() {\n if (options.newestOnTop) {\n $container.prepend($toastElement);\n } else {\n $container.append($toastElement);\n }\n }\n\n function setTitle() {\n if (map.title) {\n var suffix = map.title;\n if (options.escapeHtml) {\n suffix = escapeHtml(map.title);\n }\n $titleElement.append(suffix).addClass(options.titleClass);\n $toastElement.append($titleElement);\n }\n }\n\n function setMessage() {\n if (map.message) {\n var suffix = map.message;\n if (options.escapeHtml) {\n suffix = escapeHtml(map.message);\n }\n $messageElement.append(suffix).addClass(options.messageClass);\n $toastElement.append($messageElement);\n }\n }\n\n function setCloseButton() {\n if (options.closeButton) {\n $closeElement.addClass(options.closeClass).attr('role', 'button');\n $toastElement.prepend($closeElement);\n }\n }\n\n function setProgressBar() {\n if (options.progressBar) {\n $progressElement.addClass(options.progressClass);\n $toastElement.prepend($progressElement);\n }\n }\n\n function setRTL() {\n if (options.rtl) {\n $toastElement.addClass('rtl');\n }\n }\n\n function shouldExit(options, map) {\n if (options.preventDuplicates) {\n if (map.message === previousToast) {\n return true;\n } else {\n previousToast = map.message;\n }\n }\n return false;\n }\n\n function hideToast(override) {\n var method = override && options.closeMethod !== false ? options.closeMethod : options.hideMethod;\n var duration = override && options.closeDuration !== false ?\n options.closeDuration : options.hideDuration;\n var easing = override && options.closeEasing !== false ? options.closeEasing : options.hideEasing;\n if ($(':focus', $toastElement).length && !override) {\n return;\n }\n clearTimeout(progressBar.intervalId);\n return $toastElement[method]({\n duration: duration,\n easing: easing,\n complete: function () {\n removeToast($toastElement);\n clearTimeout(intervalId);\n if (options.onHidden && response.state !== 'hidden') {\n options.onHidden();\n }\n response.state = 'hidden';\n response.endTime = new Date();\n publish(response);\n }\n });\n }\n\n function delayedHideToast() {\n if (options.timeOut > 0 || options.extendedTimeOut > 0) {\n intervalId = setTimeout(hideToast, options.extendedTimeOut);\n progressBar.maxHideTime = parseFloat(options.extendedTimeOut);\n progressBar.hideEta = new Date().getTime() + progressBar.maxHideTime;\n }\n }\n\n function stickAround() {\n clearTimeout(intervalId);\n progressBar.hideEta = 0;\n $toastElement.stop(true, true)[options.showMethod](\n {duration: options.showDuration, easing: options.showEasing}\n );\n }\n\n function updateProgress() {\n var percentage = ((progressBar.hideEta - (new Date().getTime())) / progressBar.maxHideTime) * 100;\n $progressElement.width(percentage + '%');\n }\n }\n\n function getOptions() {\n return $.extend({}, getDefaults(), toastr.options);\n }\n\n function removeToast($toastElement) {\n if (!$container) { $container = getContainer(); }\n if ($toastElement.is(':visible')) {\n return;\n }\n $toastElement.remove();\n $toastElement = null;\n if ($container.children().length === 0) {\n $container.remove();\n previousToast = undefined;\n }\n }\n\n })();\n });\n}(typeof define === 'function' && define.amd ? define : function (deps, factory) {\n if (typeof module !== 'undefined' && module.exports) { //Node\n module.exports = factory(require('jquery'));\n } else {\n window.toastr = factory(window.jQuery);\n }\n}));\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nif (process.env.NODE_ENV !== 'production') {\n var ReactIs = require('react-is');\n\n // By explicitly using `prop-types` you are opting into new development behavior.\n // http://fb.me/prop-types-in-prod\n var throwOnDirectAccess = true;\n module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);\n} else {\n // By explicitly using `prop-types` you are opting into new production behavior.\n // http://fb.me/prop-types-in-prod\n module.exports = require('./factoryWithThrowingShims')();\n}\n","module.exports = require(\"regenerator-runtime\");\n","export default function _defineProperty(obj, key, value) {\n if (key in obj) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n } else {\n obj[key] = value;\n }\n\n return obj;\n}","import defineProperty from \"./defineProperty\";\n\nfunction ownKeys(object, enumerableOnly) {\n var keys = Object.keys(object);\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(object);\n if (enumerableOnly) symbols = symbols.filter(function (sym) {\n return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n });\n keys.push.apply(keys, symbols);\n }\n\n return keys;\n}\n\nexport default function _objectSpread2(target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i] != null ? arguments[i] : {};\n\n if (i % 2) {\n ownKeys(Object(source), true).forEach(function (key) {\n defineProperty(target, key, source[key]);\n });\n } else if (Object.getOwnPropertyDescriptors) {\n Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n } else {\n ownKeys(Object(source)).forEach(function (key) {\n Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n });\n }\n }\n\n return target;\n}","function _setPrototypeOf(o, p) {\n module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n o.__proto__ = p;\n return o;\n };\n\n return _setPrototypeOf(o, p);\n}\n\nmodule.exports = _setPrototypeOf;","function _getPrototypeOf(o) {\n module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n return o.__proto__ || Object.getPrototypeOf(o);\n };\n return _getPrototypeOf(o);\n}\n\nmodule.exports = _getPrototypeOf;","function _inheritsLoose(subClass, superClass) {\n subClass.prototype = Object.create(superClass.prototype);\n subClass.prototype.constructor = subClass;\n subClass.__proto__ = superClass;\n}\n\nmodule.exports = _inheritsLoose;","var isarray = require('isarray')\n\n/**\n * Expose `pathToRegexp`.\n */\nmodule.exports = pathToRegexp\nmodule.exports.parse = parse\nmodule.exports.compile = compile\nmodule.exports.tokensToFunction = tokensToFunction\nmodule.exports.tokensToRegExp = tokensToRegExp\n\n/**\n * The main path matching regexp utility.\n *\n * @type {RegExp}\n */\nvar PATH_REGEXP = new RegExp([\n // Match escaped characters that would otherwise appear in future matches.\n // This allows the user to escape special characters that won't transform.\n '(\\\\\\\\.)',\n // Match Express-style parameters and un-named parameters with a prefix\n // and optional suffixes. Matches appear as:\n //\n // \"/:test(\\\\d+)?\" => [\"/\", \"test\", \"\\d+\", undefined, \"?\", undefined]\n // \"/route(\\\\d+)\" => [undefined, undefined, undefined, \"\\d+\", undefined, undefined]\n // \"/*\" => [\"/\", undefined, undefined, undefined, undefined, \"*\"]\n '([\\\\/.])?(?:(?:\\\\:(\\\\w+)(?:\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))?|\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))([+*?])?|(\\\\*))'\n].join('|'), 'g')\n\n/**\n * Parse a string for the raw tokens.\n *\n * @param {string} str\n * @param {Object=} options\n * @return {!Array}\n */\nfunction parse (str, options) {\n var tokens = []\n var key = 0\n var index = 0\n var path = ''\n var defaultDelimiter = options && options.delimiter || '/'\n var res\n\n while ((res = PATH_REGEXP.exec(str)) != null) {\n var m = res[0]\n var escaped = res[1]\n var offset = res.index\n path += str.slice(index, offset)\n index = offset + m.length\n\n // Ignore already escaped sequences.\n if (escaped) {\n path += escaped[1]\n continue\n }\n\n var next = str[index]\n var prefix = res[2]\n var name = res[3]\n var capture = res[4]\n var group = res[5]\n var modifier = res[6]\n var asterisk = res[7]\n\n // Push the current path onto the tokens.\n if (path) {\n tokens.push(path)\n path = ''\n }\n\n var partial = prefix != null && next != null && next !== prefix\n var repeat = modifier === '+' || modifier === '*'\n var optional = modifier === '?' || modifier === '*'\n var delimiter = res[2] || defaultDelimiter\n var pattern = capture || group\n\n tokens.push({\n name: name || key++,\n prefix: prefix || '',\n delimiter: delimiter,\n optional: optional,\n repeat: repeat,\n partial: partial,\n asterisk: !!asterisk,\n pattern: pattern ? escapeGroup(pattern) : (asterisk ? '.*' : '[^' + escapeString(delimiter) + ']+?')\n })\n }\n\n // Match any characters still remaining.\n if (index < str.length) {\n path += str.substr(index)\n }\n\n // If the path exists, push it onto the end.\n if (path) {\n tokens.push(path)\n }\n\n return tokens\n}\n\n/**\n * Compile a string to a template function for the path.\n *\n * @param {string} str\n * @param {Object=} options\n * @return {!function(Object=, Object=)}\n */\nfunction compile (str, options) {\n return tokensToFunction(parse(str, options), options)\n}\n\n/**\n * Prettier encoding of URI path segments.\n *\n * @param {string}\n * @return {string}\n */\nfunction encodeURIComponentPretty (str) {\n return encodeURI(str).replace(/[\\/?#]/g, function (c) {\n return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n })\n}\n\n/**\n * Encode the asterisk parameter. Similar to `pretty`, but allows slashes.\n *\n * @param {string}\n * @return {string}\n */\nfunction encodeAsterisk (str) {\n return encodeURI(str).replace(/[?#]/g, function (c) {\n return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n })\n}\n\n/**\n * Expose a method for transforming tokens into the path function.\n */\nfunction tokensToFunction (tokens, options) {\n // Compile all the tokens into regexps.\n var matches = new Array(tokens.length)\n\n // Compile all the patterns before compilation.\n for (var i = 0; i < tokens.length; i++) {\n if (typeof tokens[i] === 'object') {\n matches[i] = new RegExp('^(?:' + tokens[i].pattern + ')$', flags(options))\n }\n }\n\n return function (obj, opts) {\n var path = ''\n var data = obj || {}\n var options = opts || {}\n var encode = options.pretty ? encodeURIComponentPretty : encodeURIComponent\n\n for (var i = 0; i < tokens.length; i++) {\n var token = tokens[i]\n\n if (typeof token === 'string') {\n path += token\n\n continue\n }\n\n var value = data[token.name]\n var segment\n\n if (value == null) {\n if (token.optional) {\n // Prepend partial segment prefixes.\n if (token.partial) {\n path += token.prefix\n }\n\n continue\n } else {\n throw new TypeError('Expected \"' + token.name + '\" to be defined')\n }\n }\n\n if (isarray(value)) {\n if (!token.repeat) {\n throw new TypeError('Expected \"' + token.name + '\" to not repeat, but received `' + JSON.stringify(value) + '`')\n }\n\n if (value.length === 0) {\n if (token.optional) {\n continue\n } else {\n throw new TypeError('Expected \"' + token.name + '\" to not be empty')\n }\n }\n\n for (var j = 0; j < value.length; j++) {\n segment = encode(value[j])\n\n if (!matches[i].test(segment)) {\n throw new TypeError('Expected all \"' + token.name + '\" to match \"' + token.pattern + '\", but received `' + JSON.stringify(segment) + '`')\n }\n\n path += (j === 0 ? token.prefix : token.delimiter) + segment\n }\n\n continue\n }\n\n segment = token.asterisk ? encodeAsterisk(value) : encode(value)\n\n if (!matches[i].test(segment)) {\n throw new TypeError('Expected \"' + token.name + '\" to match \"' + token.pattern + '\", but received \"' + segment + '\"')\n }\n\n path += token.prefix + segment\n }\n\n return path\n }\n}\n\n/**\n * Escape a regular expression string.\n *\n * @param {string} str\n * @return {string}\n */\nfunction escapeString (str) {\n return str.replace(/([.+*?=^!:${}()[\\]|\\/\\\\])/g, '\\\\$1')\n}\n\n/**\n * Escape the capturing group by escaping special characters and meaning.\n *\n * @param {string} group\n * @return {string}\n */\nfunction escapeGroup (group) {\n return group.replace(/([=!:$\\/()])/g, '\\\\$1')\n}\n\n/**\n * Attach the keys as a property of the regexp.\n *\n * @param {!RegExp} re\n * @param {Array} keys\n * @return {!RegExp}\n */\nfunction attachKeys (re, keys) {\n re.keys = keys\n return re\n}\n\n/**\n * Get the flags for a regexp from the options.\n *\n * @param {Object} options\n * @return {string}\n */\nfunction flags (options) {\n return options && options.sensitive ? '' : 'i'\n}\n\n/**\n * Pull out keys from a regexp.\n *\n * @param {!RegExp} path\n * @param {!Array} keys\n * @return {!RegExp}\n */\nfunction regexpToRegexp (path, keys) {\n // Use a negative lookahead to match only capturing groups.\n var groups = path.source.match(/\\((?!\\?)/g)\n\n if (groups) {\n for (var i = 0; i < groups.length; i++) {\n keys.push({\n name: i,\n prefix: null,\n delimiter: null,\n optional: false,\n repeat: false,\n partial: false,\n asterisk: false,\n pattern: null\n })\n }\n }\n\n return attachKeys(path, keys)\n}\n\n/**\n * Transform an array into a regexp.\n *\n * @param {!Array} path\n * @param {Array} keys\n * @param {!Object} options\n * @return {!RegExp}\n */\nfunction arrayToRegexp (path, keys, options) {\n var parts = []\n\n for (var i = 0; i < path.length; i++) {\n parts.push(pathToRegexp(path[i], keys, options).source)\n }\n\n var regexp = new RegExp('(?:' + parts.join('|') + ')', flags(options))\n\n return attachKeys(regexp, keys)\n}\n\n/**\n * Create a path regexp from string input.\n *\n * @param {string} path\n * @param {!Array} keys\n * @param {!Object} options\n * @return {!RegExp}\n */\nfunction stringToRegexp (path, keys, options) {\n return tokensToRegExp(parse(path, options), keys, options)\n}\n\n/**\n * Expose a function for taking tokens and returning a RegExp.\n *\n * @param {!Array} tokens\n * @param {(Array|Object)=} keys\n * @param {Object=} options\n * @return {!RegExp}\n */\nfunction tokensToRegExp (tokens, keys, options) {\n if (!isarray(keys)) {\n options = /** @type {!Object} */ (keys || options)\n keys = []\n }\n\n options = options || {}\n\n var strict = options.strict\n var end = options.end !== false\n var route = ''\n\n // Iterate over the tokens and create our regexp string.\n for (var i = 0; i < tokens.length; i++) {\n var token = tokens[i]\n\n if (typeof token === 'string') {\n route += escapeString(token)\n } else {\n var prefix = escapeString(token.prefix)\n var capture = '(?:' + token.pattern + ')'\n\n keys.push(token)\n\n if (token.repeat) {\n capture += '(?:' + prefix + capture + ')*'\n }\n\n if (token.optional) {\n if (!token.partial) {\n capture = '(?:' + prefix + '(' + capture + '))?'\n } else {\n capture = prefix + '(' + capture + ')?'\n }\n } else {\n capture = prefix + '(' + capture + ')'\n }\n\n route += capture\n }\n }\n\n var delimiter = escapeString(options.delimiter || '/')\n var endsWithDelimiter = route.slice(-delimiter.length) === delimiter\n\n // In non-strict mode we allow a slash at the end of match. If the path to\n // match already ends with a slash, we remove it for consistency. The slash\n // is valid at the end of a path match, not in the middle. This is important\n // in non-ending mode, where \"/test/\" shouldn't match \"/test//route\".\n if (!strict) {\n route = (endsWithDelimiter ? route.slice(0, -delimiter.length) : route) + '(?:' + delimiter + '(?=$))?'\n }\n\n if (end) {\n route += '$'\n } else {\n // In non-ending mode, we need the capturing groups to match as much as\n // possible by using a positive lookahead to the end or next path segment.\n route += strict && endsWithDelimiter ? '' : '(?=' + delimiter + '|$)'\n }\n\n return attachKeys(new RegExp('^' + route, flags(options)), keys)\n}\n\n/**\n * Normalize the given path string, returning a regular expression.\n *\n * An empty array can be passed in for the keys, which will hold the\n * placeholder key descriptions. For example, using `/user/:id`, `keys` will\n * contain `[{ name: 'id', delimiter: '/', optional: false, repeat: false }]`.\n *\n * @param {(string|RegExp|Array)} path\n * @param {(Array|Object)=} keys\n * @param {Object=} options\n * @return {!RegExp}\n */\nfunction pathToRegexp (path, keys, options) {\n if (!isarray(keys)) {\n options = /** @type {!Object} */ (keys || options)\n keys = []\n }\n\n options = options || {}\n\n if (path instanceof RegExp) {\n return regexpToRegexp(path, /** @type {!Array} */ (keys))\n }\n\n if (isarray(path)) {\n return arrayToRegexp(/** @type {!Array} */ (path), /** @type {!Array} */ (keys), options)\n }\n\n return stringToRegexp(/** @type {string} */ (path), /** @type {!Array} */ (keys), options)\n}\n","/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n'use strict';\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc'); // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react-is.production.min.js');\n} else {\n module.exports = require('./cjs/react-is.development.js');\n}\n","function _assertThisInitialized(self) {\n if (self === void 0) {\n throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n }\n\n return self;\n}\n\nmodule.exports = _assertThisInitialized;","var setPrototypeOf = require(\"./setPrototypeOf\");\n\nfunction isNativeReflectConstruct() {\n if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n if (Reflect.construct.sham) return false;\n if (typeof Proxy === \"function\") return true;\n\n try {\n Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n return true;\n } catch (e) {\n return false;\n }\n}\n\nfunction _construct(Parent, args, Class) {\n if (isNativeReflectConstruct()) {\n module.exports = _construct = Reflect.construct;\n } else {\n module.exports = _construct = function _construct(Parent, args, Class) {\n var a = [null];\n a.push.apply(a, args);\n var Constructor = Function.bind.apply(Parent, a);\n var instance = new Constructor();\n if (Class) setPrototypeOf(instance, Class.prototype);\n return instance;\n };\n }\n\n return _construct.apply(null, arguments);\n}\n\nmodule.exports = _construct;","'use strict';\n\nfunction checkDCE() {\n /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */\n if (\n typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' ||\n typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'\n ) {\n return;\n }\n if (process.env.NODE_ENV !== 'production') {\n // This branch is unreachable because this function is only called\n // in production, but the condition is true only in development.\n // Therefore if the branch is still here, dead code elimination wasn't\n // properly applied.\n // Don't change the message. React DevTools relies on it. Also make sure\n // this message doesn't occur elsewhere in this function, or it will cause\n // a false positive.\n throw new Error('^_^');\n }\n try {\n // Verify that the code above has been dead code eliminated (DCE'd).\n __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);\n } catch (err) {\n // DevTools shouldn't crash React, no matter what.\n // We should still report in case we break this code.\n console.error(err);\n }\n}\n\nif (process.env.NODE_ENV === 'production') {\n // DCE check should happen before ReactDOM bundle executes so that\n // DevTools can report bad minification during injection.\n checkDCE();\n module.exports = require('./cjs/react-dom.production.min.js');\n} else {\n module.exports = require('./cjs/react-dom.development.js');\n}\n","// @flow\n'use strict';\n\nvar key = '__global_unique_id__';\n\nmodule.exports = function() {\n return global[key] = (global[key] || 0) + 1;\n};\n","'use strict';\n\nvar reactIs = require('react-is');\n\n/**\n * Copyright 2015, Yahoo! Inc.\n * Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.\n */\nvar REACT_STATICS = {\n childContextTypes: true,\n contextType: true,\n contextTypes: true,\n defaultProps: true,\n displayName: true,\n getDefaultProps: true,\n getDerivedStateFromError: true,\n getDerivedStateFromProps: true,\n mixins: true,\n propTypes: true,\n type: true\n};\nvar KNOWN_STATICS = {\n name: true,\n length: true,\n prototype: true,\n caller: true,\n callee: true,\n arguments: true,\n arity: true\n};\nvar FORWARD_REF_STATICS = {\n '$$typeof': true,\n render: true,\n defaultProps: true,\n displayName: true,\n propTypes: true\n};\nvar MEMO_STATICS = {\n '$$typeof': true,\n compare: true,\n defaultProps: true,\n displayName: true,\n propTypes: true,\n type: true\n};\nvar TYPE_STATICS = {};\nTYPE_STATICS[reactIs.ForwardRef] = FORWARD_REF_STATICS;\nTYPE_STATICS[reactIs.Memo] = MEMO_STATICS;\n\nfunction getStatics(component) {\n // React v16.11 and below\n if (reactIs.isMemo(component)) {\n return MEMO_STATICS;\n } // React v16.12 and above\n\n\n return TYPE_STATICS[component['$$typeof']] || REACT_STATICS;\n}\n\nvar defineProperty = Object.defineProperty;\nvar getOwnPropertyNames = Object.getOwnPropertyNames;\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\nvar getPrototypeOf = Object.getPrototypeOf;\nvar objectPrototype = Object.prototype;\nfunction hoistNonReactStatics(targetComponent, sourceComponent, blacklist) {\n if (typeof sourceComponent !== 'string') {\n // don't hoist over string (html) components\n if (objectPrototype) {\n var inheritedComponent = getPrototypeOf(sourceComponent);\n\n if (inheritedComponent && inheritedComponent !== objectPrototype) {\n hoistNonReactStatics(targetComponent, inheritedComponent, blacklist);\n }\n }\n\n var keys = getOwnPropertyNames(sourceComponent);\n\n if (getOwnPropertySymbols) {\n keys = keys.concat(getOwnPropertySymbols(sourceComponent));\n }\n\n var targetStatics = getStatics(targetComponent);\n var sourceStatics = getStatics(sourceComponent);\n\n for (var i = 0; i < keys.length; ++i) {\n var key = keys[i];\n\n if (!KNOWN_STATICS[key] && !(blacklist && blacklist[key]) && !(sourceStatics && sourceStatics[key]) && !(targetStatics && targetStatics[key])) {\n var descriptor = getOwnPropertyDescriptor(sourceComponent, key);\n\n try {\n // Avoid failures from read-only properties\n defineProperty(targetComponent, key, descriptor);\n } catch (e) {}\n }\n }\n }\n\n return targetComponent;\n}\n\nmodule.exports = hoistNonReactStatics;\n","const { hasOwnProperty, setPrototypeOf, isFrozen, keys: objectKeys } = Object;\n\nlet { freeze, seal } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n apply = function(fun, thisValue, args) {\n return fun.apply(thisValue, args);\n };\n}\n\nif (!freeze) {\n freeze = function(x) {\n return x;\n };\n}\n\nif (!seal) {\n seal = function(x) {\n return x;\n };\n}\n\nif (!construct) {\n construct = function(Func, args) {\n return new Func(...args);\n };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayJoin = unapply(Array.prototype.join);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\nconst regExpCreate = unconstruct(RegExp);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array) {\n if (setPrototypeOf) {\n // Make 'in' and truthy checks like Boolean(set.constructor)\n // independent of any properties defined on Object.prototype.\n // Prevent prototype setters from intercepting set as a this value.\n setPrototypeOf(set, null);\n }\n\n let l = array.length;\n while (l--) {\n let element = array[l];\n if (typeof element === 'string') {\n const lcElement = stringToLowerCase(element);\n if (lcElement !== element) {\n // Config presets (e.g. tags.js, attrs.js) are immutable.\n if (!isFrozen(array)) {\n array[l] = lcElement;\n }\n\n element = lcElement;\n }\n }\n\n set[element] = true;\n }\n\n return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n const newObject = {};\n\n let property;\n for (property in object) {\n if (apply(hasOwnProperty, object, [property])) {\n newObject[property] = object[property];\n }\n }\n\n return newObject;\n}\n\nexport {\n // Array\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n // Object\n freeze,\n hasOwnProperty,\n isFrozen,\n objectKeys,\n setPrototypeOf,\n seal,\n // RegExp\n regExpCreate,\n regExpTest,\n // String\n stringIndexOf,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringTrim,\n // Errors\n typeErrorCreate,\n};\n","import { freeze } from './utils';\n\nexport const html = freeze([\n 'a',\n 'abbr',\n 'acronym',\n 'address',\n 'area',\n 'article',\n 'aside',\n 'audio',\n 'b',\n 'bdi',\n 'bdo',\n 'big',\n 'blink',\n 'blockquote',\n 'body',\n 'br',\n 'button',\n 'canvas',\n 'caption',\n 'center',\n 'cite',\n 'code',\n 'col',\n 'colgroup',\n 'content',\n 'data',\n 'datalist',\n 'dd',\n 'decorator',\n 'del',\n 'details',\n 'dfn',\n 'dir',\n 'div',\n 'dl',\n 'dt',\n 'element',\n 'em',\n 'fieldset',\n 'figcaption',\n 'figure',\n 'font',\n 'footer',\n 'form',\n 'h1',\n 'h2',\n 'h3',\n 'h4',\n 'h5',\n 'h6',\n 'head',\n 'header',\n 'hgroup',\n 'hr',\n 'html',\n 'i',\n 'img',\n 'input',\n 'ins',\n 'kbd',\n 'label',\n 'legend',\n 'li',\n 'main',\n 'map',\n 'mark',\n 'marquee',\n 'menu',\n 'menuitem',\n 'meter',\n 'nav',\n 'nobr',\n 'ol',\n 'optgroup',\n 'option',\n 'output',\n 'p',\n 'picture',\n 'pre',\n 'progress',\n 'q',\n 'rp',\n 'rt',\n 'ruby',\n 's',\n 'samp',\n 'section',\n 'select',\n 'shadow',\n 'small',\n 'source',\n 'spacer',\n 'span',\n 'strike',\n 'strong',\n 'style',\n 'sub',\n 'summary',\n 'sup',\n 'table',\n 'tbody',\n 'td',\n 'template',\n 'textarea',\n 'tfoot',\n 'th',\n 'thead',\n 'time',\n 'tr',\n 'track',\n 'tt',\n 'u',\n 'ul',\n 'var',\n 'video',\n 'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n 'svg',\n 'a',\n 'altglyph',\n 'altglyphdef',\n 'altglyphitem',\n 'animatecolor',\n 'animatemotion',\n 'animatetransform',\n 'audio',\n 'canvas',\n 'circle',\n 'clippath',\n 'defs',\n 'desc',\n 'ellipse',\n 'filter',\n 'font',\n 'g',\n 'glyph',\n 'glyphref',\n 'hkern',\n 'image',\n 'line',\n 'lineargradient',\n 'marker',\n 'mask',\n 'metadata',\n 'mpath',\n 'path',\n 'pattern',\n 'polygon',\n 'polyline',\n 'radialgradient',\n 'rect',\n 'stop',\n 'style',\n 'switch',\n 'symbol',\n 'text',\n 'textpath',\n 'title',\n 'tref',\n 'tspan',\n 'video',\n 'view',\n 'vkern',\n]);\n\nexport const svgFilters = freeze([\n 'feBlend',\n 'feColorMatrix',\n 'feComponentTransfer',\n 'feComposite',\n 'feConvolveMatrix',\n 'feDiffuseLighting',\n 'feDisplacementMap',\n 'feDistantLight',\n 'feFlood',\n 'feFuncA',\n 'feFuncB',\n 'feFuncG',\n 'feFuncR',\n 'feGaussianBlur',\n 'feMerge',\n 'feMergeNode',\n 'feMorphology',\n 'feOffset',\n 'fePointLight',\n 'feSpecularLighting',\n 'feSpotLight',\n 'feTile',\n 'feTurbulence',\n]);\n\nexport const mathMl = freeze([\n 'math',\n 'menclose',\n 'merror',\n 'mfenced',\n 'mfrac',\n 'mglyph',\n 'mi',\n 'mlabeledtr',\n 'mmultiscripts',\n 'mn',\n 'mo',\n 'mover',\n 'mpadded',\n 'mphantom',\n 'mroot',\n 'mrow',\n 'ms',\n 'mspace',\n 'msqrt',\n 'mstyle',\n 'msub',\n 'msup',\n 'msubsup',\n 'mtable',\n 'mtd',\n 'mtext',\n 'mtr',\n 'munder',\n 'munderover',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils';\n\nexport const html = freeze([\n 'accept',\n 'action',\n 'align',\n 'alt',\n 'autocomplete',\n 'background',\n 'bgcolor',\n 'border',\n 'cellpadding',\n 'cellspacing',\n 'checked',\n 'cite',\n 'class',\n 'clear',\n 'color',\n 'cols',\n 'colspan',\n 'controls',\n 'coords',\n 'crossorigin',\n 'datetime',\n 'default',\n 'dir',\n 'disabled',\n 'download',\n 'enctype',\n 'face',\n 'for',\n 'headers',\n 'height',\n 'hidden',\n 'high',\n 'href',\n 'hreflang',\n 'id',\n 'integrity',\n 'ismap',\n 'label',\n 'lang',\n 'list',\n 'loop',\n 'low',\n 'max',\n 'maxlength',\n 'media',\n 'method',\n 'min',\n 'minlength',\n 'multiple',\n 'name',\n 'noshade',\n 'novalidate',\n 'nowrap',\n 'open',\n 'optimum',\n 'pattern',\n 'placeholder',\n 'poster',\n 'preload',\n 'pubdate',\n 'radiogroup',\n 'readonly',\n 'rel',\n 'required',\n 'rev',\n 'reversed',\n 'role',\n 'rows',\n 'rowspan',\n 'spellcheck',\n 'scope',\n 'selected',\n 'shape',\n 'size',\n 'sizes',\n 'span',\n 'srclang',\n 'start',\n 'src',\n 'srcset',\n 'step',\n 'style',\n 'summary',\n 'tabindex',\n 'title',\n 'type',\n 'usemap',\n 'valign',\n 'value',\n 'width',\n 'xmlns',\n]);\n\nexport const svg = freeze([\n 'accent-height',\n 'accumulate',\n 'additive',\n 'alignment-baseline',\n 'ascent',\n 'attributename',\n 'attributetype',\n 'azimuth',\n 'basefrequency',\n 'baseline-shift',\n 'begin',\n 'bias',\n 'by',\n 'class',\n 'clip',\n 'clip-path',\n 'clip-rule',\n 'color',\n 'color-interpolation',\n 'color-interpolation-filters',\n 'color-profile',\n 'color-rendering',\n 'cx',\n 'cy',\n 'd',\n 'dx',\n 'dy',\n 'diffuseconstant',\n 'direction',\n 'display',\n 'divisor',\n 'dur',\n 'edgemode',\n 'elevation',\n 'end',\n 'fill',\n 'fill-opacity',\n 'fill-rule',\n 'filter',\n 'filterunits',\n 'flood-color',\n 'flood-opacity',\n 'font-family',\n 'font-size',\n 'font-size-adjust',\n 'font-stretch',\n 'font-style',\n 'font-variant',\n 'font-weight',\n 'fx',\n 'fy',\n 'g1',\n 'g2',\n 'glyph-name',\n 'glyphref',\n 'gradientunits',\n 'gradienttransform',\n 'height',\n 'href',\n 'id',\n 'image-rendering',\n 'in',\n 'in2',\n 'k',\n 'k1',\n 'k2',\n 'k3',\n 'k4',\n 'kerning',\n 'keypoints',\n 'keysplines',\n 'keytimes',\n 'lang',\n 'lengthadjust',\n 'letter-spacing',\n 'kernelmatrix',\n 'kernelunitlength',\n 'lighting-color',\n 'local',\n 'marker-end',\n 'marker-mid',\n 'marker-start',\n 'markerheight',\n 'markerunits',\n 'markerwidth',\n 'maskcontentunits',\n 'maskunits',\n 'max',\n 'mask',\n 'media',\n 'method',\n 'mode',\n 'min',\n 'name',\n 'numoctaves',\n 'offset',\n 'operator',\n 'opacity',\n 'order',\n 'orient',\n 'orientation',\n 'origin',\n 'overflow',\n 'paint-order',\n 'path',\n 'pathlength',\n 'patterncontentunits',\n 'patterntransform',\n 'patternunits',\n 'points',\n 'preservealpha',\n 'preserveaspectratio',\n 'primitiveunits',\n 'r',\n 'rx',\n 'ry',\n 'radius',\n 'refx',\n 'refy',\n 'repeatcount',\n 'repeatdur',\n 'restart',\n 'result',\n 'rotate',\n 'scale',\n 'seed',\n 'shape-rendering',\n 'specularconstant',\n 'specularexponent',\n 'spreadmethod',\n 'stddeviation',\n 'stitchtiles',\n 'stop-color',\n 'stop-opacity',\n 'stroke-dasharray',\n 'stroke-dashoffset',\n 'stroke-linecap',\n 'stroke-linejoin',\n 'stroke-miterlimit',\n 'stroke-opacity',\n 'stroke',\n 'stroke-width',\n 'style',\n 'surfacescale',\n 'tabindex',\n 'targetx',\n 'targety',\n 'transform',\n 'text-anchor',\n 'text-decoration',\n 'text-rendering',\n 'textlength',\n 'type',\n 'u1',\n 'u2',\n 'unicode',\n 'values',\n 'viewbox',\n 'visibility',\n 'version',\n 'vert-adv-y',\n 'vert-origin-x',\n 'vert-origin-y',\n 'width',\n 'word-spacing',\n 'wrap',\n 'writing-mode',\n 'xchannelselector',\n 'ychannelselector',\n 'x',\n 'x1',\n 'x2',\n 'xmlns',\n 'y',\n 'y1',\n 'y2',\n 'z',\n 'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n 'accent',\n 'accentunder',\n 'align',\n 'bevelled',\n 'close',\n 'columnsalign',\n 'columnlines',\n 'columnspan',\n 'denomalign',\n 'depth',\n 'dir',\n 'display',\n 'displaystyle',\n 'encoding',\n 'fence',\n 'frame',\n 'height',\n 'href',\n 'id',\n 'largeop',\n 'length',\n 'linethickness',\n 'lspace',\n 'lquote',\n 'mathbackground',\n 'mathcolor',\n 'mathsize',\n 'mathvariant',\n 'maxsize',\n 'minsize',\n 'movablelimits',\n 'notation',\n 'numalign',\n 'open',\n 'rowalign',\n 'rowlines',\n 'rowspacing',\n 'rowspan',\n 'rspace',\n 'rquote',\n 'scriptlevel',\n 'scriptminsize',\n 'scriptsizemultiplier',\n 'selection',\n 'separator',\n 'separators',\n 'stretchy',\n 'subscriptshift',\n 'supscriptshift',\n 'symmetric',\n 'voffset',\n 'width',\n 'xmlns',\n]);\n\nexport const xml = freeze([\n 'xlink:href',\n 'xml:id',\n 'xlink:title',\n 'xml:space',\n 'xmlns:xlink',\n]);\n","import { seal } from './utils';\n\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\s\\S]*|[\\s\\S]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\s\\S]*|[\\s\\S]*%>/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205f\\u3000]/g // eslint-disable-line no-control-regex\n);\n","import * as TAGS from './tags';\nimport * as ATTRS from './attrs';\nimport * as EXPRESSIONS from './regexp';\nimport {\n addToSet,\n clone,\n freeze,\n objectKeys,\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringIndexOf,\n stringTrim,\n regExpTest,\n regExpCreate,\n typeErrorCreate,\n} from './utils';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function(trustedTypes, document) {\n if (\n typeof trustedTypes !== 'object' ||\n typeof trustedTypes.createPolicy !== 'function'\n ) {\n return null;\n }\n\n // Allow the callers to control the unique policy name\n // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n // Policy creation with duplicate names throws in Trusted Types.\n let suffix = null;\n const ATTR_NAME = 'data-tt-policy-suffix';\n if (\n document.currentScript &&\n document.currentScript.hasAttribute(ATTR_NAME)\n ) {\n suffix = document.currentScript.getAttribute(ATTR_NAME);\n }\n\n const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n try {\n return trustedTypes.createPolicy(policyName, {\n createHTML(html) {\n return html;\n },\n });\n } catch (error) {\n // Policy creation failed (most likely another DOMPurify script has\n // already run). Skip creating the policy, as this will only cause errors\n // if TT are enforced.\n console.warn(\n 'TrustedTypes policy ' + policyName + ' could not be created.'\n );\n return null;\n }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n const DOMPurify = root => createDOMPurify(root);\n\n /**\n * Version label, exposed for easier checks\n * if DOMPurify is up to date or not\n */\n DOMPurify.version = VERSION;\n\n /**\n * Array of elements that DOMPurify removed during sanitation.\n * Empty if nothing was removed.\n */\n DOMPurify.removed = [];\n\n if (!window || !window.document || window.document.nodeType !== 9) {\n // Not running in a browser, provide a factory function\n // so that you can pass your own Window\n DOMPurify.isSupported = false;\n\n return DOMPurify;\n }\n\n const originalDocument = window.document;\n let useDOMParser = false;\n let removeTitle = false;\n\n let { document } = window;\n const {\n DocumentFragment,\n HTMLTemplateElement,\n Node,\n NodeFilter,\n NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n Text,\n Comment,\n DOMParser,\n trustedTypes,\n } = window;\n\n // As per issue #47, the web-components registry is inherited by a\n // new document created via createHTMLDocument. As per the spec\n // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n // a new empty registry is used when creating a template contents owner\n // document, so we use that as our parent document to ensure nothing\n // is inherited.\n if (typeof HTMLTemplateElement === 'function') {\n const template = document.createElement('template');\n if (template.content && template.content.ownerDocument) {\n document = template.content.ownerDocument;\n }\n }\n\n const trustedTypesPolicy = _createTrustedTypesPolicy(\n trustedTypes,\n originalDocument\n );\n const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n const {\n implementation,\n createNodeIterator,\n getElementsByTagName,\n createDocumentFragment,\n } = document;\n const { importNode } = originalDocument;\n\n let hooks = {};\n\n /**\n * Expose whether this browser supports running the full DOMPurify.\n */\n DOMPurify.isSupported =\n implementation &&\n typeof implementation.createHTMLDocument !== 'undefined' &&\n document.documentMode !== 9;\n\n const {\n MUSTACHE_EXPR,\n ERB_EXPR,\n DATA_ATTR,\n ARIA_ATTR,\n IS_SCRIPT_OR_DATA,\n ATTR_WHITESPACE,\n } = EXPRESSIONS;\n\n let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n /**\n * We consider the elements and attributes below to be safe. Ideally\n * don't add any new ones but feel free to remove unwanted ones.\n */\n\n /* allowed element names */\n let ALLOWED_TAGS = null;\n const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n ...TAGS.html,\n ...TAGS.svg,\n ...TAGS.svgFilters,\n ...TAGS.mathMl,\n ...TAGS.text,\n ]);\n\n /* Allowed attribute names */\n let ALLOWED_ATTR = null;\n const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n ...ATTRS.html,\n ...ATTRS.svg,\n ...ATTRS.mathMl,\n ...ATTRS.xml,\n ]);\n\n /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n let FORBID_TAGS = null;\n\n /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n let FORBID_ATTR = null;\n\n /* Decide if ARIA attributes are okay */\n let ALLOW_ARIA_ATTR = true;\n\n /* Decide if custom data attributes are okay */\n let ALLOW_DATA_ATTR = true;\n\n /* Decide if unknown protocols are okay */\n let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n /* Output should be safe for jQuery's $() factory? */\n let SAFE_FOR_JQUERY = false;\n\n /* Output should be safe for common template engines.\n * This means, DOMPurify removes data attributes, mustaches and ERB\n */\n let SAFE_FOR_TEMPLATES = false;\n\n /* Decide if document with <html>... should be returned */\n let WHOLE_DOCUMENT = false;\n\n /* Track whether config is already set on this instance of DOMPurify. */\n let SET_CONFIG = false;\n\n /* Decide if all elements (e.g. style, script) must be children of\n * document.body. By default, browsers might move them to document.head */\n let FORCE_BODY = false;\n\n /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported).\n * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n */\n let RETURN_DOM = false;\n\n /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported) */\n let RETURN_DOM_FRAGMENT = false;\n\n /* If `RETURN_DOM` or `RETURN_DOM_FRAGMENT` is enabled, decide if the returned DOM\n * `Node` is imported into the current `Document`. If this flag is not enabled the\n * `Node` will belong (its ownerDocument) to a fresh `HTMLDocument`, created by\n * DOMPurify. */\n let RETURN_DOM_IMPORT = false;\n\n /* Try to return a Trusted Type object instead of a string, retrun a string in\n * case Trusted Types are not supported */\n let RETURN_TRUSTED_TYPE = false;\n\n /* Output should be free from DOM clobbering attacks? */\n let SANITIZE_DOM = true;\n\n /* Keep element content when removing element? */\n let KEEP_CONTENT = true;\n\n /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n * of importing it into a new Document and returning a sanitized copy */\n let IN_PLACE = false;\n\n /* Allow usage of profiles like html, svg and mathMl */\n let USE_PROFILES = {};\n\n /* Tags to ignore content of when KEEP_CONTENT is true */\n const FORBID_CONTENTS = addToSet({}, [\n 'annotation-xml',\n 'audio',\n 'colgroup',\n 'desc',\n 'foreignobject',\n 'head',\n 'iframe',\n 'math',\n 'mi',\n 'mn',\n 'mo',\n 'ms',\n 'mtext',\n 'noembed',\n 'noframes',\n 'plaintext',\n 'script',\n 'style',\n 'svg',\n 'template',\n 'thead',\n 'title',\n 'video',\n 'xmp',\n ]);\n\n /* Tags that are safe for data: URIs */\n const DATA_URI_TAGS = addToSet({}, [\n 'audio',\n 'video',\n 'img',\n 'source',\n 'image',\n ]);\n\n /* Attributes safe for values like \"javascript:\" */\n let URI_SAFE_ATTRIBUTES = null;\n const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n 'alt',\n 'class',\n 'for',\n 'id',\n 'label',\n 'name',\n 'pattern',\n 'placeholder',\n 'summary',\n 'title',\n 'value',\n 'style',\n 'xmlns',\n ]);\n\n /* Keep a reference to config to pass to hooks */\n let CONFIG = null;\n\n /* Ideally, do not touch anything below this line */\n /* ______________________________________________ */\n\n const formElement = document.createElement('form');\n\n /**\n * _parseConfig\n *\n * @param {Object} cfg optional config literal\n */\n // eslint-disable-next-line complexity\n const _parseConfig = function(cfg) {\n if (CONFIG && CONFIG === cfg) {\n return;\n }\n\n /* Shield configuration object from tampering */\n if (!cfg || typeof cfg !== 'object') {\n cfg = {};\n }\n\n /* Set configuration parameters */\n ALLOWED_TAGS =\n 'ALLOWED_TAGS' in cfg\n ? addToSet({}, cfg.ALLOWED_TAGS)\n : DEFAULT_ALLOWED_TAGS;\n ALLOWED_ATTR =\n 'ALLOWED_ATTR' in cfg\n ? addToSet({}, cfg.ALLOWED_ATTR)\n : DEFAULT_ALLOWED_ATTR;\n URI_SAFE_ATTRIBUTES =\n 'ADD_URI_SAFE_ATTR' in cfg\n ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR)\n : DEFAULT_URI_SAFE_ATTRIBUTES;\n FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS) : {};\n FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR) : {};\n USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n SAFE_FOR_JQUERY = cfg.SAFE_FOR_JQUERY || false; // Default false\n SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n RETURN_DOM_IMPORT = cfg.RETURN_DOM_IMPORT || false; // Default false\n RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n IN_PLACE = cfg.IN_PLACE || false; // Default false\n IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;\n if (SAFE_FOR_TEMPLATES) {\n ALLOW_DATA_ATTR = false;\n }\n\n if (RETURN_DOM_FRAGMENT) {\n RETURN_DOM = true;\n }\n\n /* Parse profile info */\n if (USE_PROFILES) {\n ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n ALLOWED_ATTR = [];\n if (USE_PROFILES.html === true) {\n addToSet(ALLOWED_TAGS, TAGS.html);\n addToSet(ALLOWED_ATTR, ATTRS.html);\n }\n\n if (USE_PROFILES.svg === true) {\n addToSet(ALLOWED_TAGS, TAGS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.svgFilters === true) {\n addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.mathMl === true) {\n addToSet(ALLOWED_TAGS, TAGS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n }\n\n /* Merge configuration parameters */\n if (cfg.ADD_TAGS) {\n if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n ALLOWED_TAGS = clone(ALLOWED_TAGS);\n }\n\n addToSet(ALLOWED_TAGS, cfg.ADD_TAGS);\n }\n\n if (cfg.ADD_ATTR) {\n if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n ALLOWED_ATTR = clone(ALLOWED_ATTR);\n }\n\n addToSet(ALLOWED_ATTR, cfg.ADD_ATTR);\n }\n\n if (cfg.ADD_URI_SAFE_ATTR) {\n addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR);\n }\n\n /* Add #text in case KEEP_CONTENT is set to true */\n if (KEEP_CONTENT) {\n ALLOWED_TAGS['#text'] = true;\n }\n\n /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n if (WHOLE_DOCUMENT) {\n addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n }\n\n /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n if (ALLOWED_TAGS.table) {\n addToSet(ALLOWED_TAGS, ['tbody']);\n delete FORBID_TAGS.tbody;\n }\n\n // Prevent further manipulation of configuration.\n // Not available in IE8, Safari 5, etc.\n if (freeze) {\n freeze(cfg);\n }\n\n CONFIG = cfg;\n };\n\n /**\n * _forceRemove\n *\n * @param {Node} node a DOM node\n */\n const _forceRemove = function(node) {\n arrayPush(DOMPurify.removed, { element: node });\n try {\n node.parentNode.removeChild(node);\n } catch (error) {\n node.outerHTML = emptyHTML;\n }\n };\n\n /**\n * _removeAttribute\n *\n * @param {String} name an Attribute name\n * @param {Node} node a DOM node\n */\n const _removeAttribute = function(name, node) {\n try {\n arrayPush(DOMPurify.removed, {\n attribute: node.getAttributeNode(name),\n from: node,\n });\n } catch (error) {\n arrayPush(DOMPurify.removed, {\n attribute: null,\n from: node,\n });\n }\n\n node.removeAttribute(name);\n };\n\n /**\n * _initDocument\n *\n * @param {String} dirty a string of dirty markup\n * @return {Document} a DOM, filled with the dirty markup\n */\n const _initDocument = function(dirty) {\n /* Create a HTML document */\n let doc;\n let leadingWhitespace;\n\n if (FORCE_BODY) {\n dirty = '<remove></remove>' + dirty;\n } else {\n /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n const matches = stringMatch(dirty, /^[\\s]+/);\n leadingWhitespace = matches && matches[0];\n }\n\n const dirtyPayload = trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(dirty)\n : dirty;\n /* Use DOMParser to workaround Firefox bug (see comment below) */\n if (useDOMParser) {\n try {\n doc = new DOMParser().parseFromString(dirtyPayload, 'text/html');\n } catch (error) {}\n }\n\n /* Remove title to fix a mXSS bug in older MS Edge */\n if (removeTitle) {\n addToSet(FORBID_TAGS, ['title']);\n }\n\n /* Otherwise use createHTMLDocument, because DOMParser is unsafe in\n Safari (see comment below) */\n if (!doc || !doc.documentElement) {\n doc = implementation.createHTMLDocument('');\n const { body } = doc;\n body.parentNode.removeChild(body.parentNode.firstElementChild);\n body.outerHTML = dirtyPayload;\n }\n\n if (dirty && leadingWhitespace) {\n doc.body.insertBefore(\n document.createTextNode(leadingWhitespace),\n doc.body.childNodes[0] || null\n );\n }\n\n /* Work on whole document or just its body */\n return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];\n };\n\n // Firefox uses a different parser for innerHTML rather than\n // DOMParser (see https://bugzilla.mozilla.org/show_bug.cgi?id=1205631)\n // which means that you *must* use DOMParser, otherwise the output may\n // not be safe if used in a document.write context later.\n //\n // So we feature detect the Firefox bug and use the DOMParser if necessary.\n //\n // Chrome 77 and other versions ship an mXSS bug that caused a bypass to\n // happen. We now check for the mXSS trigger and react accordingly.\n if (DOMPurify.isSupported) {\n (function() {\n try {\n const doc = _initDocument(\n '<svg><p><textarea><img src=\"</textarea><img src=x abc=1//\">'\n );\n if (doc.querySelector('svg img')) {\n useDOMParser = true;\n }\n } catch (error) {}\n })();\n\n (function() {\n try {\n const doc = _initDocument('<x/><title></title><img>');\n if (regExpTest(/<\\/title/, doc.querySelector('title').innerHTML)) {\n removeTitle = true;\n }\n } catch (error) {}\n })();\n }\n\n /**\n * _createIterator\n *\n * @param {Document} root document/fragment to create iterator for\n * @return {Iterator} iterator instance\n */\n const _createIterator = function(root) {\n return createNodeIterator.call(\n root.ownerDocument || root,\n root,\n NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n () => {\n return NodeFilter.FILTER_ACCEPT;\n },\n false\n );\n };\n\n /**\n * _isClobbered\n *\n * @param {Node} elm element to check for clobbering attacks\n * @return {Boolean} true if clobbered, false if safe\n */\n const _isClobbered = function(elm) {\n if (elm instanceof Text || elm instanceof Comment) {\n return false;\n }\n\n if (\n typeof elm.nodeName !== 'string' ||\n typeof elm.textContent !== 'string' ||\n typeof elm.removeChild !== 'function' ||\n !(elm.attributes instanceof NamedNodeMap) ||\n typeof elm.removeAttribute !== 'function' ||\n typeof elm.setAttribute !== 'function' ||\n typeof elm.namespaceURI !== 'string'\n ) {\n return true;\n }\n\n return false;\n };\n\n /**\n * _isNode\n *\n * @param {Node} obj object to check whether it's a DOM node\n * @return {Boolean} true is object is a DOM node\n */\n const _isNode = function(obj) {\n return typeof Node === 'object'\n ? obj instanceof Node\n : obj &&\n typeof obj === 'object' &&\n typeof obj.nodeType === 'number' &&\n typeof obj.nodeName === 'string';\n };\n\n /**\n * _executeHook\n * Execute user configurable hooks\n *\n * @param {String} entryPoint Name of the hook's entry point\n * @param {Node} currentNode node to work on with the hook\n * @param {Object} data additional hook parameters\n */\n const _executeHook = function(entryPoint, currentNode, data) {\n if (!hooks[entryPoint]) {\n return;\n }\n\n arrayForEach(hooks[entryPoint], hook => {\n hook.call(DOMPurify, currentNode, data, CONFIG);\n });\n };\n\n /**\n * _sanitizeElements\n *\n * @protect nodeName\n * @protect textContent\n * @protect removeChild\n *\n * @param {Node} currentNode to check for permission to exist\n * @return {Boolean} true if node was killed, false if left alive\n */\n // eslint-disable-next-line complexity\n const _sanitizeElements = function(currentNode) {\n let content;\n\n /* Execute a hook if present */\n _executeHook('beforeSanitizeElements', currentNode, null);\n\n /* Check if element is clobbered or can clobber */\n if (_isClobbered(currentNode)) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Now let's check the element's type and name */\n const tagName = stringToLowerCase(currentNode.nodeName);\n\n /* Execute a hook if present */\n _executeHook('uponSanitizeElement', currentNode, {\n tagName,\n allowedTags: ALLOWED_TAGS,\n });\n\n /* Take care of an mXSS pattern using p, br inside svg, math */\n if (\n (tagName === 'svg' || tagName === 'math') &&\n currentNode.querySelectorAll('p, br').length !== 0\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Remove element if anything forbids its presence */\n if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n /* Keep content except for black-listed elements */\n if (\n KEEP_CONTENT &&\n !FORBID_CONTENTS[tagName] &&\n typeof currentNode.insertAdjacentHTML === 'function'\n ) {\n try {\n const htmlToInsert = currentNode.innerHTML;\n currentNode.insertAdjacentHTML(\n 'AfterEnd',\n trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(htmlToInsert)\n : htmlToInsert\n );\n } catch (error) {}\n }\n\n _forceRemove(currentNode);\n return true;\n }\n\n /* Remove in case a noscript/noembed XSS is suspected */\n if (\n tagName === 'noscript' &&\n regExpTest(/<\\/noscript/i, currentNode.innerHTML)\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n if (\n tagName === 'noembed' &&\n regExpTest(/<\\/noembed/i, currentNode.innerHTML)\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Convert markup to cover jQuery behavior */\n if (\n SAFE_FOR_JQUERY &&\n !currentNode.firstElementChild &&\n (!currentNode.content || !currentNode.content.firstElementChild) &&\n regExpTest(/</g, currentNode.textContent)\n ) {\n arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n if (currentNode.innerHTML) {\n currentNode.innerHTML = stringReplace(\n currentNode.innerHTML,\n /</g,\n '<'\n );\n } else {\n currentNode.innerHTML = stringReplace(\n currentNode.textContent,\n /</g,\n '<'\n );\n }\n }\n\n /* Sanitize element content to be template-safe */\n if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n /* Get the element's text content */\n content = currentNode.textContent;\n content = stringReplace(content, MUSTACHE_EXPR, ' ');\n content = stringReplace(content, ERB_EXPR, ' ');\n if (currentNode.textContent !== content) {\n arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n currentNode.textContent = content;\n }\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeElements', currentNode, null);\n\n return false;\n };\n\n /**\n * _isValidAttribute\n *\n * @param {string} lcTag Lowercase tag name of containing element.\n * @param {string} lcName Lowercase attribute name.\n * @param {string} value Attribute value.\n * @return {Boolean} Returns true if `value` is valid, otherwise false.\n */\n // eslint-disable-next-line complexity\n const _isValidAttribute = function(lcTag, lcName, value) {\n /* Make sure attribute cannot clobber */\n if (\n SANITIZE_DOM &&\n (lcName === 'id' || lcName === 'name') &&\n (value in document || value in formElement)\n ) {\n return false;\n }\n\n /* Allow valid data-* attributes: At least one character after \"-\"\n (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n We don't need to check the value; it's always URI safe. */\n if (ALLOW_DATA_ATTR && regExpTest(DATA_ATTR, lcName)) {\n // This attribute is safe\n } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n // This attribute is safe\n /* Otherwise, check the name is permitted */\n } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n return false;\n\n /* Check value is safe. First, is attr inert? If so, is safe */\n } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n // This attribute is safe\n /* Check no script, data or unknown possibly unsafe URI\n unless we know URI values are safe for that attribute */\n } else if (\n regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n ) {\n // This attribute is safe\n /* Keep image data URIs alive if src/xlink:href is allowed */\n /* Further prevent gadget XSS for dynamically built script tags */\n } else if (\n (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n lcTag !== 'script' &&\n stringIndexOf(value, 'data:') === 0 &&\n DATA_URI_TAGS[lcTag]\n ) {\n // This attribute is safe\n /* Allow unknown protocols: This provides support for links that\n are handled by protocol handlers which may be unknown ahead of\n time, e.g. fb:, spotify: */\n } else if (\n ALLOW_UNKNOWN_PROTOCOLS &&\n !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))\n ) {\n // This attribute is safe\n /* Check for binary attributes */\n // eslint-disable-next-line no-negated-condition\n } else if (!value) {\n // Binary attributes are safe at this point\n /* Anything else, presume unsafe, do not add it back */\n } else {\n return false;\n }\n\n return true;\n };\n\n /**\n * _sanitizeAttributes\n *\n * @protect attributes\n * @protect nodeName\n * @protect removeAttribute\n * @protect setAttribute\n *\n * @param {Node} currentNode to sanitize\n */\n // eslint-disable-next-line complexity\n const _sanitizeAttributes = function(currentNode) {\n let attr;\n let value;\n let lcName;\n let idAttr;\n let l;\n /* Execute a hook if present */\n _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n let { attributes } = currentNode;\n\n /* Check if we have attributes; if not we might have a text node */\n if (!attributes) {\n return;\n }\n\n const hookEvent = {\n attrName: '',\n attrValue: '',\n keepAttr: true,\n allowedAttributes: ALLOWED_ATTR,\n };\n l = attributes.length;\n\n /* Go backwards over all attributes; safely remove bad ones */\n while (l--) {\n attr = attributes[l];\n const { name, namespaceURI } = attr;\n value = stringTrim(attr.value);\n lcName = stringToLowerCase(name);\n\n /* Execute a hook if present */\n hookEvent.attrName = lcName;\n hookEvent.attrValue = value;\n hookEvent.keepAttr = true;\n hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n value = hookEvent.attrValue;\n /* Did the hooks approve of the attribute? */\n if (hookEvent.forceKeepAttr) {\n continue;\n }\n\n /* Remove attribute */\n // Safari (iOS + Mac), last tested v8.0.5, crashes if you try to\n // remove a \"name\" attribute from an <img> tag that has an \"id\"\n // attribute at the time.\n if (\n lcName === 'name' &&\n currentNode.nodeName === 'IMG' &&\n attributes.id\n ) {\n idAttr = attributes.id;\n attributes = arraySlice(attributes, []);\n _removeAttribute('id', currentNode);\n _removeAttribute(name, currentNode);\n if (arrayIndexOf(attributes, idAttr) > l) {\n currentNode.setAttribute('id', idAttr.value);\n }\n } else if (\n // This works around a bug in Safari, where input[type=file]\n // cannot be dynamically set after type has been removed\n currentNode.nodeName === 'INPUT' &&\n lcName === 'type' &&\n value === 'file' &&\n hookEvent.keepAttr &&\n (ALLOWED_ATTR[lcName] || !FORBID_ATTR[lcName])\n ) {\n continue;\n } else {\n // This avoids a crash in Safari v9.0 with double-ids.\n // The trick is to first set the id to be empty and then to\n // remove the attribute\n if (name === 'id') {\n currentNode.setAttribute(name, '');\n }\n\n _removeAttribute(name, currentNode);\n }\n\n /* Did the hooks approve of the attribute? */\n if (!hookEvent.keepAttr) {\n continue;\n }\n\n /* Work around a security issue in jQuery 3.0 */\n if (SAFE_FOR_JQUERY && regExpTest(/\\/>/i, value)) {\n _removeAttribute(name, currentNode);\n continue;\n }\n\n /* Take care of an mXSS pattern using namespace switches */\n if (\n regExpTest(/svg|math/i, currentNode.namespaceURI) &&\n regExpTest(\n regExpCreate(\n '</(' + arrayJoin(objectKeys(FORBID_CONTENTS), '|') + ')',\n 'i'\n ),\n value\n )\n ) {\n _removeAttribute(name, currentNode);\n continue;\n }\n\n /* Sanitize attribute content to be template-safe */\n if (SAFE_FOR_TEMPLATES) {\n value = stringReplace(value, MUSTACHE_EXPR, ' ');\n value = stringReplace(value, ERB_EXPR, ' ');\n }\n\n /* Is `value` valid for this attribute? */\n const lcTag = currentNode.nodeName.toLowerCase();\n if (!_isValidAttribute(lcTag, lcName, value)) {\n continue;\n }\n\n /* Handle invalid data-* attribute set by try-catching it */\n try {\n if (namespaceURI) {\n currentNode.setAttributeNS(namespaceURI, name, value);\n } else {\n /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n currentNode.setAttribute(name, value);\n }\n\n arrayPop(DOMPurify.removed);\n } catch (error) {}\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeAttributes', currentNode, null);\n };\n\n /**\n * _sanitizeShadowDOM\n *\n * @param {DocumentFragment} fragment to iterate over recursively\n */\n const _sanitizeShadowDOM = function(fragment) {\n let shadowNode;\n const shadowIterator = _createIterator(fragment);\n\n /* Execute a hook if present */\n _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n while ((shadowNode = shadowIterator.nextNode())) {\n /* Execute a hook if present */\n _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n /* Sanitize tags and elements */\n if (_sanitizeElements(shadowNode)) {\n continue;\n }\n\n /* Deep shadow DOM detected */\n if (shadowNode.content instanceof DocumentFragment) {\n _sanitizeShadowDOM(shadowNode.content);\n }\n\n /* Check attributes, sanitize if necessary */\n _sanitizeAttributes(shadowNode);\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeShadowDOM', fragment, null);\n };\n\n /**\n * Sanitize\n * Public method providing core sanitation functionality\n *\n * @param {String|Node} dirty string or DOM node\n * @param {Object} configuration object\n */\n // eslint-disable-next-line complexity\n DOMPurify.sanitize = function(dirty, cfg) {\n let body;\n let importedNode;\n let currentNode;\n let oldNode;\n let returnNode;\n /* Make sure we have a string to sanitize.\n DO NOT return early, as this will return the wrong type if\n the user has requested a DOM object rather than a string */\n if (!dirty) {\n dirty = '<!-->';\n }\n\n /* Stringify, in case dirty is an object */\n if (typeof dirty !== 'string' && !_isNode(dirty)) {\n // eslint-disable-next-line no-negated-condition\n if (typeof dirty.toString !== 'function') {\n throw typeErrorCreate('toString is not a function');\n } else {\n dirty = dirty.toString();\n if (typeof dirty !== 'string') {\n throw typeErrorCreate('dirty is not a string, aborting');\n }\n }\n }\n\n /* Check we can run. Otherwise fall back or ignore */\n if (!DOMPurify.isSupported) {\n if (\n typeof window.toStaticHTML === 'object' ||\n typeof window.toStaticHTML === 'function'\n ) {\n if (typeof dirty === 'string') {\n return window.toStaticHTML(dirty);\n }\n\n if (_isNode(dirty)) {\n return window.toStaticHTML(dirty.outerHTML);\n }\n }\n\n return dirty;\n }\n\n /* Assign config vars */\n if (!SET_CONFIG) {\n _parseConfig(cfg);\n }\n\n /* Clean up removed elements */\n DOMPurify.removed = [];\n\n /* Check if dirty is correctly typed for IN_PLACE */\n if (typeof dirty === 'string') {\n IN_PLACE = false;\n }\n\n if (IN_PLACE) {\n /* No special handling necessary for in-place sanitization */\n } else if (dirty instanceof Node) {\n /* If dirty is a DOM element, append to an empty document to avoid\n elements being stripped by the parser */\n body = _initDocument('<!-->');\n importedNode = body.ownerDocument.importNode(dirty, true);\n if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n /* Node is already a body, use as is */\n body = importedNode;\n } else if (importedNode.nodeName === 'HTML') {\n body = importedNode;\n } else {\n // eslint-disable-next-line unicorn/prefer-node-append\n body.appendChild(importedNode);\n }\n } else {\n /* Exit directly if we have nothing to do */\n if (\n !RETURN_DOM &&\n !SAFE_FOR_TEMPLATES &&\n !WHOLE_DOCUMENT &&\n RETURN_TRUSTED_TYPE &&\n dirty.indexOf('<') === -1\n ) {\n return trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(dirty)\n : dirty;\n }\n\n /* Initialize the document to work on */\n body = _initDocument(dirty);\n\n /* Check we have a DOM node from the data */\n if (!body) {\n return RETURN_DOM ? null : emptyHTML;\n }\n }\n\n /* Remove first element node (ours) if FORCE_BODY is set */\n if (body && FORCE_BODY) {\n _forceRemove(body.firstChild);\n }\n\n /* Get node iterator */\n const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n /* Now start iterating over the created document */\n while ((currentNode = nodeIterator.nextNode())) {\n /* Fix IE's strange behavior with manipulated textNodes #89 */\n if (currentNode.nodeType === 3 && currentNode === oldNode) {\n continue;\n }\n\n /* Sanitize tags and elements */\n if (_sanitizeElements(currentNode)) {\n continue;\n }\n\n /* Shadow DOM detected, sanitize it */\n if (currentNode.content instanceof DocumentFragment) {\n _sanitizeShadowDOM(currentNode.content);\n }\n\n /* Check attributes, sanitize if necessary */\n _sanitizeAttributes(currentNode);\n\n oldNode = currentNode;\n }\n\n oldNode = null;\n\n /* If we sanitized `dirty` in-place, return it. */\n if (IN_PLACE) {\n return dirty;\n }\n\n /* Return sanitized string or DOM */\n if (RETURN_DOM) {\n if (RETURN_DOM_FRAGMENT) {\n returnNode = createDocumentFragment.call(body.ownerDocument);\n\n while (body.firstChild) {\n // eslint-disable-next-line unicorn/prefer-node-append\n returnNode.appendChild(body.firstChild);\n }\n } else {\n returnNode = body;\n }\n\n if (RETURN_DOM_IMPORT) {\n /* AdoptNode() is not used because internal state is not reset\n (e.g. the past names map of a HTMLFormElement), this is safe\n in theory but we would rather not risk another attack vector.\n The state that is cloned by importNode() is explicitly defined\n by the specs. */\n returnNode = importNode.call(originalDocument, returnNode, true);\n }\n\n return returnNode;\n }\n\n let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n\n /* Sanitize final string template-safe */\n if (SAFE_FOR_TEMPLATES) {\n serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');\n serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');\n }\n\n return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n ? trustedTypesPolicy.createHTML(serializedHTML)\n : serializedHTML;\n };\n\n /**\n * Public method to set the configuration once\n * setConfig\n *\n * @param {Object} cfg configuration object\n */\n DOMPurify.setConfig = function(cfg) {\n _parseConfig(cfg);\n SET_CONFIG = true;\n };\n\n /**\n * Public method to remove the configuration\n * clearConfig\n *\n */\n DOMPurify.clearConfig = function() {\n CONFIG = null;\n SET_CONFIG = false;\n };\n\n /**\n * Public method to check if an attribute value is valid.\n * Uses last set config, if any. Otherwise, uses config defaults.\n * isValidAttribute\n *\n * @param {string} tag Tag name of containing element.\n * @param {string} attr Attribute name.\n * @param {string} value Attribute value.\n * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.\n */\n DOMPurify.isValidAttribute = function(tag, attr, value) {\n /* Initialize shared config vars if necessary. */\n if (!CONFIG) {\n _parseConfig({});\n }\n\n const lcTag = stringToLowerCase(tag);\n const lcName = stringToLowerCase(attr);\n return _isValidAttribute(lcTag, lcName, value);\n };\n\n /**\n * AddHook\n * Public method to add DOMPurify hooks\n *\n * @param {String} entryPoint entry point for the hook to add\n * @param {Function} hookFunction function to execute\n */\n DOMPurify.addHook = function(entryPoint, hookFunction) {\n if (typeof hookFunction !== 'function') {\n return;\n }\n\n hooks[entryPoint] = hooks[entryPoint] || [];\n arrayPush(hooks[entryPoint], hookFunction);\n };\n\n /**\n * RemoveHook\n * Public method to remove a DOMPurify hook at a given entryPoint\n * (pops it from the stack of hooks if more are present)\n *\n * @param {String} entryPoint entry point for the hook to remove\n */\n DOMPurify.removeHook = function(entryPoint) {\n if (hooks[entryPoint]) {\n arrayPop(hooks[entryPoint]);\n }\n };\n\n /**\n * RemoveHooks\n * Public method to remove all DOMPurify hooks at a given entryPoint\n *\n * @param {String} entryPoint entry point for the hooks to remove\n */\n DOMPurify.removeHooks = function(entryPoint) {\n if (hooks[entryPoint]) {\n hooks[entryPoint] = [];\n }\n };\n\n /**\n * RemoveAllHooks\n * Public method to remove all DOMPurify hooks\n *\n */\n DOMPurify.removeAllHooks = function() {\n hooks = {};\n };\n\n return DOMPurify;\n}\n\nexport default createDOMPurify();\n","/* flatpickr v4.6.3, @license MIT */\n(function (global, factory) {\n typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n typeof define === 'function' && define.amd ? define(factory) :\n (global = global || self, global.flatpickr = factory());\n}(this, function () { 'use strict';\n\n /*! *****************************************************************************\r\n Copyright (c) Microsoft Corporation. All rights reserved.\r\n Licensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\n this file except in compliance with the License. You may obtain a copy of the\r\n License at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\n THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\n KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\n WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\n MERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\n See the Apache Version 2.0 License for specific language governing permissions\r\n and limitations under the License.\r\n ***************************************************************************** */\r\n\r\n var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n };\r\n return __assign.apply(this, arguments);\r\n };\n\n var HOOKS = [\n \"onChange\",\n \"onClose\",\n \"onDayCreate\",\n \"onDestroy\",\n \"onKeyDown\",\n \"onMonthChange\",\n \"onOpen\",\n \"onParseConfig\",\n \"onReady\",\n \"onValueUpdate\",\n \"onYearChange\",\n \"onPreCalendarPosition\",\n ];\n var defaults = {\n _disable: [],\n _enable: [],\n allowInput: false,\n altFormat: \"F j, Y\",\n altInput: false,\n altInputClass: \"form-control input\",\n animate: typeof window === \"object\" &&\n window.navigator.userAgent.indexOf(\"MSIE\") === -1,\n ariaDateFormat: \"F j, Y\",\n clickOpens: true,\n closeOnSelect: true,\n conjunction: \", \",\n dateFormat: \"Y-m-d\",\n defaultHour: 12,\n defaultMinute: 0,\n defaultSeconds: 0,\n disable: [],\n disableMobile: false,\n enable: [],\n enableSeconds: false,\n enableTime: false,\n errorHandler: function (err) {\n return typeof console !== \"undefined\" && console.warn(err);\n },\n getWeek: function (givenDate) {\n var date = new Date(givenDate.getTime());\n date.setHours(0, 0, 0, 0);\n // Thursday in current week decides the year.\n date.setDate(date.getDate() + 3 - ((date.getDay() + 6) % 7));\n // January 4 is always in week 1.\n var week1 = new Date(date.getFullYear(), 0, 4);\n // Adjust to Thursday in week 1 and count number of weeks from date to week1.\n return (1 +\n Math.round(((date.getTime() - week1.getTime()) / 86400000 -\n 3 +\n ((week1.getDay() + 6) % 7)) /\n 7));\n },\n hourIncrement: 1,\n ignoredFocusElements: [],\n inline: false,\n locale: \"default\",\n minuteIncrement: 5,\n mode: \"single\",\n monthSelectorType: \"dropdown\",\n nextArrow: \"<svg version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' viewBox='0 0 17 17'><g></g><path d='M13.207 8.472l-7.854 7.854-0.707-0.707 7.146-7.146-7.146-7.148 0.707-0.707 7.854 7.854z' /></svg>\",\n noCalendar: false,\n now: new Date(),\n onChange: [],\n onClose: [],\n onDayCreate: [],\n onDestroy: [],\n onKeyDown: [],\n onMonthChange: [],\n onOpen: [],\n onParseConfig: [],\n onReady: [],\n onValueUpdate: [],\n onYearChange: [],\n onPreCalendarPosition: [],\n plugins: [],\n position: \"auto\",\n positionElement: undefined,\n prevArrow: \"<svg version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' viewBox='0 0 17 17'><g></g><path d='M5.207 8.471l7.146 7.147-0.707 0.707-7.853-7.854 7.854-7.853 0.707 0.707-7.147 7.146z' /></svg>\",\n shorthandCurrentMonth: false,\n showMonths: 1,\n static: false,\n time_24hr: false,\n weekNumbers: false,\n wrap: false\n };\n\n var english = {\n weekdays: {\n shorthand: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n longhand: [\n \"Sunday\",\n \"Monday\",\n \"Tuesday\",\n \"Wednesday\",\n \"Thursday\",\n \"Friday\",\n \"Saturday\",\n ]\n },\n months: {\n shorthand: [\n \"Jan\",\n \"Feb\",\n \"Mar\",\n \"Apr\",\n \"May\",\n \"Jun\",\n \"Jul\",\n \"Aug\",\n \"Sep\",\n \"Oct\",\n \"Nov\",\n \"Dec\",\n ],\n longhand: [\n \"January\",\n \"February\",\n \"March\",\n \"April\",\n \"May\",\n \"June\",\n \"July\",\n \"August\",\n \"September\",\n \"October\",\n \"November\",\n \"December\",\n ]\n },\n daysInMonth: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],\n firstDayOfWeek: 0,\n ordinal: function (nth) {\n var s = nth % 100;\n if (s > 3 && s < 21)\n return \"th\";\n switch (s % 10) {\n case 1:\n return \"st\";\n case 2:\n return \"nd\";\n case 3:\n return \"rd\";\n default:\n return \"th\";\n }\n },\n rangeSeparator: \" to \",\n weekAbbreviation: \"Wk\",\n scrollTitle: \"Scroll to increment\",\n toggleTitle: \"Click to toggle\",\n amPM: [\"AM\", \"PM\"],\n yearAriaLabel: \"Year\",\n hourAriaLabel: \"Hour\",\n minuteAriaLabel: \"Minute\",\n time_24hr: false\n };\n\n var pad = function (number) { return (\"0\" + number).slice(-2); };\n var int = function (bool) { return (bool === true ? 1 : 0); };\n /* istanbul ignore next */\n function debounce(func, wait, immediate) {\n if (immediate === void 0) { immediate = false; }\n var timeout;\n return function () {\n var context = this, args = arguments;\n timeout !== null && clearTimeout(timeout);\n timeout = window.setTimeout(function () {\n timeout = null;\n if (!immediate)\n func.apply(context, args);\n }, wait);\n if (immediate && !timeout)\n func.apply(context, args);\n };\n }\n var arrayify = function (obj) {\n return obj instanceof Array ? obj : [obj];\n };\n\n function toggleClass(elem, className, bool) {\n if (bool === true)\n return elem.classList.add(className);\n elem.classList.remove(className);\n }\n function createElement(tag, className, content) {\n var e = window.document.createElement(tag);\n className = className || \"\";\n content = content || \"\";\n e.className = className;\n if (content !== undefined)\n e.textContent = content;\n return e;\n }\n function clearNode(node) {\n while (node.firstChild)\n node.removeChild(node.firstChild);\n }\n function findParent(node, condition) {\n if (condition(node))\n return node;\n else if (node.parentNode)\n return findParent(node.parentNode, condition);\n return undefined; // nothing found\n }\n function createNumberInput(inputClassName, opts) {\n var wrapper = createElement(\"div\", \"numInputWrapper\"), numInput = createElement(\"input\", \"numInput \" + inputClassName), arrowUp = createElement(\"span\", \"arrowUp\"), arrowDown = createElement(\"span\", \"arrowDown\");\n if (navigator.userAgent.indexOf(\"MSIE 9.0\") === -1) {\n numInput.type = \"number\";\n }\n else {\n numInput.type = \"text\";\n numInput.pattern = \"\\\\d*\";\n }\n if (opts !== undefined)\n for (var key in opts)\n numInput.setAttribute(key, opts[key]);\n wrapper.appendChild(numInput);\n wrapper.appendChild(arrowUp);\n wrapper.appendChild(arrowDown);\n return wrapper;\n }\n function getEventTarget(event) {\n if (typeof event.composedPath === \"function\") {\n var path = event.composedPath();\n return path[0];\n }\n return event.target;\n }\n\n var doNothing = function () { return undefined; };\n var monthToStr = function (monthNumber, shorthand, locale) { return locale.months[shorthand ? \"shorthand\" : \"longhand\"][monthNumber]; };\n var revFormat = {\n D: doNothing,\n F: function (dateObj, monthName, locale) {\n dateObj.setMonth(locale.months.longhand.indexOf(monthName));\n },\n G: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n H: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n J: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n K: function (dateObj, amPM, locale) {\n dateObj.setHours((dateObj.getHours() % 12) +\n 12 * int(new RegExp(locale.amPM[1], \"i\").test(amPM)));\n },\n M: function (dateObj, shortMonth, locale) {\n dateObj.setMonth(locale.months.shorthand.indexOf(shortMonth));\n },\n S: function (dateObj, seconds) {\n dateObj.setSeconds(parseFloat(seconds));\n },\n U: function (_, unixSeconds) { return new Date(parseFloat(unixSeconds) * 1000); },\n W: function (dateObj, weekNum, locale) {\n var weekNumber = parseInt(weekNum);\n var date = new Date(dateObj.getFullYear(), 0, 2 + (weekNumber - 1) * 7, 0, 0, 0, 0);\n date.setDate(date.getDate() - date.getDay() + locale.firstDayOfWeek);\n return date;\n },\n Y: function (dateObj, year) {\n dateObj.setFullYear(parseFloat(year));\n },\n Z: function (_, ISODate) { return new Date(ISODate); },\n d: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n h: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n i: function (dateObj, minutes) {\n dateObj.setMinutes(parseFloat(minutes));\n },\n j: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n l: doNothing,\n m: function (dateObj, month) {\n dateObj.setMonth(parseFloat(month) - 1);\n },\n n: function (dateObj, month) {\n dateObj.setMonth(parseFloat(month) - 1);\n },\n s: function (dateObj, seconds) {\n dateObj.setSeconds(parseFloat(seconds));\n },\n u: function (_, unixMillSeconds) {\n return new Date(parseFloat(unixMillSeconds));\n },\n w: doNothing,\n y: function (dateObj, year) {\n dateObj.setFullYear(2000 + parseFloat(year));\n }\n };\n var tokenRegex = {\n D: \"(\\\\w+)\",\n F: \"(\\\\w+)\",\n G: \"(\\\\d\\\\d|\\\\d)\",\n H: \"(\\\\d\\\\d|\\\\d)\",\n J: \"(\\\\d\\\\d|\\\\d)\\\\w+\",\n K: \"\",\n M: \"(\\\\w+)\",\n S: \"(\\\\d\\\\d|\\\\d)\",\n U: \"(.+)\",\n W: \"(\\\\d\\\\d|\\\\d)\",\n Y: \"(\\\\d{4})\",\n Z: \"(.+)\",\n d: \"(\\\\d\\\\d|\\\\d)\",\n h: \"(\\\\d\\\\d|\\\\d)\",\n i: \"(\\\\d\\\\d|\\\\d)\",\n j: \"(\\\\d\\\\d|\\\\d)\",\n l: \"(\\\\w+)\",\n m: \"(\\\\d\\\\d|\\\\d)\",\n n: \"(\\\\d\\\\d|\\\\d)\",\n s: \"(\\\\d\\\\d|\\\\d)\",\n u: \"(.+)\",\n w: \"(\\\\d\\\\d|\\\\d)\",\n y: \"(\\\\d{2})\"\n };\n var formats = {\n // get the date in UTC\n Z: function (date) { return date.toISOString(); },\n // weekday name, short, e.g. Thu\n D: function (date, locale, options) {\n return locale.weekdays.shorthand[formats.w(date, locale, options)];\n },\n // full month name e.g. January\n F: function (date, locale, options) {\n return monthToStr(formats.n(date, locale, options) - 1, false, locale);\n },\n // padded hour 1-12\n G: function (date, locale, options) {\n return pad(formats.h(date, locale, options));\n },\n // hours with leading zero e.g. 03\n H: function (date) { return pad(date.getHours()); },\n // day (1-30) with ordinal suffix e.g. 1st, 2nd\n J: function (date, locale) {\n return locale.ordinal !== undefined\n ? date.getDate() + locale.ordinal(date.getDate())\n : date.getDate();\n },\n // AM/PM\n K: function (date, locale) { return locale.amPM[int(date.getHours() > 11)]; },\n // shorthand month e.g. Jan, Sep, Oct, etc\n M: function (date, locale) {\n return monthToStr(date.getMonth(), true, locale);\n },\n // seconds 00-59\n S: function (date) { return pad(date.getSeconds()); },\n // unix timestamp\n U: function (date) { return date.getTime() / 1000; },\n W: function (date, _, options) {\n return options.getWeek(date);\n },\n // full year e.g. 2016\n Y: function (date) { return date.getFullYear(); },\n // day in month, padded (01-30)\n d: function (date) { return pad(date.getDate()); },\n // hour from 1-12 (am/pm)\n h: function (date) { return (date.getHours() % 12 ? date.getHours() % 12 : 12); },\n // minutes, padded with leading zero e.g. 09\n i: function (date) { return pad(date.getMinutes()); },\n // day in month (1-30)\n j: function (date) { return date.getDate(); },\n // weekday name, full, e.g. Thursday\n l: function (date, locale) {\n return locale.weekdays.longhand[date.getDay()];\n },\n // padded month number (01-12)\n m: function (date) { return pad(date.getMonth() + 1); },\n // the month number (1-12)\n n: function (date) { return date.getMonth() + 1; },\n // seconds 0-59\n s: function (date) { return date.getSeconds(); },\n // Unix Milliseconds\n u: function (date) { return date.getTime(); },\n // number of the day of the week\n w: function (date) { return date.getDay(); },\n // last two digits of year e.g. 16 for 2016\n y: function (date) { return String(date.getFullYear()).substring(2); }\n };\n\n var createDateFormatter = function (_a) {\n var _b = _a.config, config = _b === void 0 ? defaults : _b, _c = _a.l10n, l10n = _c === void 0 ? english : _c;\n return function (dateObj, frmt, overrideLocale) {\n var locale = overrideLocale || l10n;\n if (config.formatDate !== undefined) {\n return config.formatDate(dateObj, frmt, locale);\n }\n return frmt\n .split(\"\")\n .map(function (c, i, arr) {\n return formats[c] && arr[i - 1] !== \"\\\\\"\n ? formats[c](dateObj, locale, config)\n : c !== \"\\\\\"\n ? c\n : \"\";\n })\n .join(\"\");\n };\n };\n var createDateParser = function (_a) {\n var _b = _a.config, config = _b === void 0 ? defaults : _b, _c = _a.l10n, l10n = _c === void 0 ? english : _c;\n return function (date, givenFormat, timeless, customLocale) {\n if (date !== 0 && !date)\n return undefined;\n var locale = customLocale || l10n;\n var parsedDate;\n var dateOrig = date;\n if (date instanceof Date)\n parsedDate = new Date(date.getTime());\n else if (typeof date !== \"string\" &&\n date.toFixed !== undefined // timestamp\n )\n // create a copy\n parsedDate = new Date(date);\n else if (typeof date === \"string\") {\n // date string\n var format = givenFormat || (config || defaults).dateFormat;\n var datestr = String(date).trim();\n if (datestr === \"today\") {\n parsedDate = new Date();\n timeless = true;\n }\n else if (/Z$/.test(datestr) ||\n /GMT$/.test(datestr) // datestrings w/ timezone\n )\n parsedDate = new Date(date);\n else if (config && config.parseDate)\n parsedDate = config.parseDate(date, format);\n else {\n parsedDate =\n !config || !config.noCalendar\n ? new Date(new Date().getFullYear(), 0, 1, 0, 0, 0, 0)\n : new Date(new Date().setHours(0, 0, 0, 0));\n var matched = void 0, ops = [];\n for (var i = 0, matchIndex = 0, regexStr = \"\"; i < format.length; i++) {\n var token_1 = format[i];\n var isBackSlash = token_1 === \"\\\\\";\n var escaped = format[i - 1] === \"\\\\\" || isBackSlash;\n if (tokenRegex[token_1] && !escaped) {\n regexStr += tokenRegex[token_1];\n var match = new RegExp(regexStr).exec(date);\n if (match && (matched = true)) {\n ops[token_1 !== \"Y\" ? \"push\" : \"unshift\"]({\n fn: revFormat[token_1],\n val: match[++matchIndex]\n });\n }\n }\n else if (!isBackSlash)\n regexStr += \".\"; // don't really care\n ops.forEach(function (_a) {\n var fn = _a.fn, val = _a.val;\n return (parsedDate = fn(parsedDate, val, locale) || parsedDate);\n });\n }\n parsedDate = matched ? parsedDate : undefined;\n }\n }\n /* istanbul ignore next */\n if (!(parsedDate instanceof Date && !isNaN(parsedDate.getTime()))) {\n config.errorHandler(new Error(\"Invalid date provided: \" + dateOrig));\n return undefined;\n }\n if (timeless === true)\n parsedDate.setHours(0, 0, 0, 0);\n return parsedDate;\n };\n };\n /**\n * Compute the difference in dates, measured in ms\n */\n function compareDates(date1, date2, timeless) {\n if (timeless === void 0) { timeless = true; }\n if (timeless !== false) {\n return (new Date(date1.getTime()).setHours(0, 0, 0, 0) -\n new Date(date2.getTime()).setHours(0, 0, 0, 0));\n }\n return date1.getTime() - date2.getTime();\n }\n var isBetween = function (ts, ts1, ts2) {\n return ts > Math.min(ts1, ts2) && ts < Math.max(ts1, ts2);\n };\n var duration = {\n DAY: 86400000\n };\n\n if (typeof Object.assign !== \"function\") {\n Object.assign = function (target) {\n var args = [];\n for (var _i = 1; _i < arguments.length; _i++) {\n args[_i - 1] = arguments[_i];\n }\n if (!target) {\n throw TypeError(\"Cannot convert undefined or null to object\");\n }\n var _loop_1 = function (source) {\n if (source) {\n Object.keys(source).forEach(function (key) { return (target[key] = source[key]); });\n }\n };\n for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {\n var source = args_1[_a];\n _loop_1(source);\n }\n return target;\n };\n }\n\n var DEBOUNCED_CHANGE_MS = 300;\n function FlatpickrInstance(element, instanceConfig) {\n var self = {\n config: __assign({}, defaults, flatpickr.defaultConfig),\n l10n: english\n };\n self.parseDate = createDateParser({ config: self.config, l10n: self.l10n });\n self._handlers = [];\n self.pluginElements = [];\n self.loadedPlugins = [];\n self._bind = bind;\n self._setHoursFromDate = setHoursFromDate;\n self._positionCalendar = positionCalendar;\n self.changeMonth = changeMonth;\n self.changeYear = changeYear;\n self.clear = clear;\n self.close = close;\n self._createElement = createElement;\n self.destroy = destroy;\n self.isEnabled = isEnabled;\n self.jumpToDate = jumpToDate;\n self.open = open;\n self.redraw = redraw;\n self.set = set;\n self.setDate = setDate;\n self.toggle = toggle;\n function setupHelperFunctions() {\n self.utils = {\n getDaysInMonth: function (month, yr) {\n if (month === void 0) { month = self.currentMonth; }\n if (yr === void 0) { yr = self.currentYear; }\n if (month === 1 && ((yr % 4 === 0 && yr % 100 !== 0) || yr % 400 === 0))\n return 29;\n return self.l10n.daysInMonth[month];\n }\n };\n }\n function init() {\n self.element = self.input = element;\n self.isOpen = false;\n parseConfig();\n setupLocale();\n setupInputs();\n setupDates();\n setupHelperFunctions();\n if (!self.isMobile)\n build();\n bindEvents();\n if (self.selectedDates.length || self.config.noCalendar) {\n if (self.config.enableTime) {\n setHoursFromDate(self.config.noCalendar\n ? self.latestSelectedDateObj || self.config.minDate\n : undefined);\n }\n updateValue(false);\n }\n setCalendarWidth();\n self.showTimeInput =\n self.selectedDates.length > 0 || self.config.noCalendar;\n var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);\n /* TODO: investigate this further\n \n Currently, there is weird positioning behavior in safari causing pages\n to scroll up. https://github.com/chmln/flatpickr/issues/563\n \n However, most browsers are not Safari and positioning is expensive when used\n in scale. https://github.com/chmln/flatpickr/issues/1096\n */\n if (!self.isMobile && isSafari) {\n positionCalendar();\n }\n triggerEvent(\"onReady\");\n }\n function bindToInstance(fn) {\n return fn.bind(self);\n }\n function setCalendarWidth() {\n var config = self.config;\n if (config.weekNumbers === false && config.showMonths === 1)\n return;\n else if (config.noCalendar !== true) {\n window.requestAnimationFrame(function () {\n if (self.calendarContainer !== undefined) {\n self.calendarContainer.style.visibility = \"hidden\";\n self.calendarContainer.style.display = \"block\";\n }\n if (self.daysContainer !== undefined) {\n var daysWidth = (self.days.offsetWidth + 1) * config.showMonths;\n self.daysContainer.style.width = daysWidth + \"px\";\n self.calendarContainer.style.width =\n daysWidth +\n (self.weekWrapper !== undefined\n ? self.weekWrapper.offsetWidth\n : 0) +\n \"px\";\n self.calendarContainer.style.removeProperty(\"visibility\");\n self.calendarContainer.style.removeProperty(\"display\");\n }\n });\n }\n }\n /**\n * The handler for all events targeting the time inputs\n */\n function updateTime(e) {\n if (self.selectedDates.length === 0) {\n setDefaultTime();\n }\n if (e !== undefined && e.type !== \"blur\") {\n timeWrapper(e);\n }\n var prevValue = self._input.value;\n setHoursFromInputs();\n updateValue();\n if (self._input.value !== prevValue) {\n self._debouncedChange();\n }\n }\n function ampm2military(hour, amPM) {\n return (hour % 12) + 12 * int(amPM === self.l10n.amPM[1]);\n }\n function military2ampm(hour) {\n switch (hour % 24) {\n case 0:\n case 12:\n return 12;\n default:\n return hour % 12;\n }\n }\n /**\n * Syncs the selected date object time with user's time input\n */\n function setHoursFromInputs() {\n if (self.hourElement === undefined || self.minuteElement === undefined)\n return;\n var hours = (parseInt(self.hourElement.value.slice(-2), 10) || 0) % 24, minutes = (parseInt(self.minuteElement.value, 10) || 0) % 60, seconds = self.secondElement !== undefined\n ? (parseInt(self.secondElement.value, 10) || 0) % 60\n : 0;\n if (self.amPM !== undefined) {\n hours = ampm2military(hours, self.amPM.textContent);\n }\n var limitMinHours = self.config.minTime !== undefined ||\n (self.config.minDate &&\n self.minDateHasTime &&\n self.latestSelectedDateObj &&\n compareDates(self.latestSelectedDateObj, self.config.minDate, true) ===\n 0);\n var limitMaxHours = self.config.maxTime !== undefined ||\n (self.config.maxDate &&\n self.maxDateHasTime &&\n self.latestSelectedDateObj &&\n compareDates(self.latestSelectedDateObj, self.config.maxDate, true) ===\n 0);\n if (limitMaxHours) {\n var maxTime = self.config.maxTime !== undefined\n ? self.config.maxTime\n : self.config.maxDate;\n hours = Math.min(hours, maxTime.getHours());\n if (hours === maxTime.getHours())\n minutes = Math.min(minutes, maxTime.getMinutes());\n if (minutes === maxTime.getMinutes())\n seconds = Math.min(seconds, maxTime.getSeconds());\n }\n if (limitMinHours) {\n var minTime = self.config.minTime !== undefined\n ? self.config.minTime\n : self.config.minDate;\n hours = Math.max(hours, minTime.getHours());\n if (hours === minTime.getHours())\n minutes = Math.max(minutes, minTime.getMinutes());\n if (minutes === minTime.getMinutes())\n seconds = Math.max(seconds, minTime.getSeconds());\n }\n setHours(hours, minutes, seconds);\n }\n /**\n * Syncs time input values with a date\n */\n function setHoursFromDate(dateObj) {\n var date = dateObj || self.latestSelectedDateObj;\n if (date)\n setHours(date.getHours(), date.getMinutes(), date.getSeconds());\n }\n function setDefaultHours() {\n var hours = self.config.defaultHour;\n var minutes = self.config.defaultMinute;\n var seconds = self.config.defaultSeconds;\n if (self.config.minDate !== undefined) {\n var minHr = self.config.minDate.getHours();\n var minMinutes = self.config.minDate.getMinutes();\n hours = Math.max(hours, minHr);\n if (hours === minHr)\n minutes = Math.max(minMinutes, minutes);\n if (hours === minHr && minutes === minMinutes)\n seconds = self.config.minDate.getSeconds();\n }\n if (self.config.maxDate !== undefined) {\n var maxHr = self.config.maxDate.getHours();\n var maxMinutes = self.config.maxDate.getMinutes();\n hours = Math.min(hours, maxHr);\n if (hours === maxHr)\n minutes = Math.min(maxMinutes, minutes);\n if (hours === maxHr && minutes === maxMinutes)\n seconds = self.config.maxDate.getSeconds();\n }\n setHours(hours, minutes, seconds);\n }\n /**\n * Sets the hours, minutes, and optionally seconds\n * of the latest selected date object and the\n * corresponding time inputs\n * @param {Number} hours the hour. whether its military\n * or am-pm gets inferred from config\n * @param {Number} minutes the minutes\n * @param {Number} seconds the seconds (optional)\n */\n function setHours(hours, minutes, seconds) {\n if (self.latestSelectedDateObj !== undefined) {\n self.latestSelectedDateObj.setHours(hours % 24, minutes, seconds || 0, 0);\n }\n if (!self.hourElement || !self.minuteElement || self.isMobile)\n return;\n self.hourElement.value = pad(!self.config.time_24hr\n ? ((12 + hours) % 12) + 12 * int(hours % 12 === 0)\n : hours);\n self.minuteElement.value = pad(minutes);\n if (self.amPM !== undefined)\n self.amPM.textContent = self.l10n.amPM[int(hours >= 12)];\n if (self.secondElement !== undefined)\n self.secondElement.value = pad(seconds);\n }\n /**\n * Handles the year input and incrementing events\n * @param {Event} event the keyup or increment event\n */\n function onYearInput(event) {\n var year = parseInt(event.target.value) + (event.delta || 0);\n if (year / 1000 > 1 ||\n (event.key === \"Enter\" && !/[^\\d]/.test(year.toString()))) {\n changeYear(year);\n }\n }\n /**\n * Essentially addEventListener + tracking\n * @param {Element} element the element to addEventListener to\n * @param {String} event the event name\n * @param {Function} handler the event handler\n */\n function bind(element, event, handler, options) {\n if (event instanceof Array)\n return event.forEach(function (ev) { return bind(element, ev, handler, options); });\n if (element instanceof Array)\n return element.forEach(function (el) { return bind(el, event, handler, options); });\n element.addEventListener(event, handler, options);\n self._handlers.push({\n element: element,\n event: event,\n handler: handler,\n options: options\n });\n }\n /**\n * A mousedown handler which mimics click.\n * Minimizes latency, since we don't need to wait for mouseup in most cases.\n * Also, avoids handling right clicks.\n *\n * @param {Function} handler the event handler\n */\n function onClick(handler) {\n return function (evt) {\n evt.which === 1 && handler(evt);\n };\n }\n function triggerChange() {\n triggerEvent(\"onChange\");\n }\n /**\n * Adds all the necessary event listeners\n */\n function bindEvents() {\n if (self.config.wrap) {\n [\"open\", \"close\", \"toggle\", \"clear\"].forEach(function (evt) {\n Array.prototype.forEach.call(self.element.querySelectorAll(\"[data-\" + evt + \"]\"), function (el) {\n return bind(el, \"click\", self[evt]);\n });\n });\n }\n if (self.isMobile) {\n setupMobile();\n return;\n }\n var debouncedResize = debounce(onResize, 50);\n self._debouncedChange = debounce(triggerChange, DEBOUNCED_CHANGE_MS);\n if (self.daysContainer && !/iPhone|iPad|iPod/i.test(navigator.userAgent))\n bind(self.daysContainer, \"mouseover\", function (e) {\n if (self.config.mode === \"range\")\n onMouseOver(e.target);\n });\n bind(window.document.body, \"keydown\", onKeyDown);\n if (!self.config.inline && !self.config.static)\n bind(window, \"resize\", debouncedResize);\n if (window.ontouchstart !== undefined)\n bind(window.document, \"touchstart\", documentClick);\n else\n bind(window.document, \"mousedown\", onClick(documentClick));\n bind(window.document, \"focus\", documentClick, { capture: true });\n if (self.config.clickOpens === true) {\n bind(self._input, \"focus\", self.open);\n bind(self._input, \"mousedown\", onClick(self.open));\n }\n if (self.daysContainer !== undefined) {\n bind(self.monthNav, \"mousedown\", onClick(onMonthNavClick));\n bind(self.monthNav, [\"keyup\", \"increment\"], onYearInput);\n bind(self.daysContainer, \"mousedown\", onClick(selectDate));\n }\n if (self.timeContainer !== undefined &&\n self.minuteElement !== undefined &&\n self.hourElement !== undefined) {\n var selText = function (e) {\n return e.target.select();\n };\n bind(self.timeContainer, [\"increment\"], updateTime);\n bind(self.timeContainer, \"blur\", updateTime, { capture: true });\n bind(self.timeContainer, \"mousedown\", onClick(timeIncrement));\n bind([self.hourElement, self.minuteElement], [\"focus\", \"click\"], selText);\n if (self.secondElement !== undefined)\n bind(self.secondElement, \"focus\", function () { return self.secondElement && self.secondElement.select(); });\n if (self.amPM !== undefined) {\n bind(self.amPM, \"mousedown\", onClick(function (e) {\n updateTime(e);\n triggerChange();\n }));\n }\n }\n }\n /**\n * Set the calendar view to a particular date.\n * @param {Date} jumpDate the date to set the view to\n * @param {boolean} triggerChange if change events should be triggered\n */\n function jumpToDate(jumpDate, triggerChange) {\n var jumpTo = jumpDate !== undefined\n ? self.parseDate(jumpDate)\n : self.latestSelectedDateObj ||\n (self.config.minDate && self.config.minDate > self.now\n ? self.config.minDate\n : self.config.maxDate && self.config.maxDate < self.now\n ? self.config.maxDate\n : self.now);\n var oldYear = self.currentYear;\n var oldMonth = self.currentMonth;\n try {\n if (jumpTo !== undefined) {\n self.currentYear = jumpTo.getFullYear();\n self.currentMonth = jumpTo.getMonth();\n }\n }\n catch (e) {\n /* istanbul ignore next */\n e.message = \"Invalid date supplied: \" + jumpTo;\n self.config.errorHandler(e);\n }\n if (triggerChange && self.currentYear !== oldYear) {\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n if (triggerChange &&\n (self.currentYear !== oldYear || self.currentMonth !== oldMonth)) {\n triggerEvent(\"onMonthChange\");\n }\n self.redraw();\n }\n /**\n * The up/down arrow handler for time inputs\n * @param {Event} e the click event\n */\n function timeIncrement(e) {\n if (~e.target.className.indexOf(\"arrow\"))\n incrementNumInput(e, e.target.classList.contains(\"arrowUp\") ? 1 : -1);\n }\n /**\n * Increments/decrements the value of input associ-\n * ated with the up/down arrow by dispatching an\n * \"increment\" event on the input.\n *\n * @param {Event} e the click event\n * @param {Number} delta the diff (usually 1 or -1)\n * @param {Element} inputElem the input element\n */\n function incrementNumInput(e, delta, inputElem) {\n var target = e && e.target;\n var input = inputElem ||\n (target && target.parentNode && target.parentNode.firstChild);\n var event = createEvent(\"increment\");\n event.delta = delta;\n input && input.dispatchEvent(event);\n }\n function build() {\n var fragment = window.document.createDocumentFragment();\n self.calendarContainer = createElement(\"div\", \"flatpickr-calendar\");\n self.calendarContainer.tabIndex = -1;\n if (!self.config.noCalendar) {\n fragment.appendChild(buildMonthNav());\n self.innerContainer = createElement(\"div\", \"flatpickr-innerContainer\");\n if (self.config.weekNumbers) {\n var _a = buildWeeks(), weekWrapper = _a.weekWrapper, weekNumbers = _a.weekNumbers;\n self.innerContainer.appendChild(weekWrapper);\n self.weekNumbers = weekNumbers;\n self.weekWrapper = weekWrapper;\n }\n self.rContainer = createElement(\"div\", \"flatpickr-rContainer\");\n self.rContainer.appendChild(buildWeekdays());\n if (!self.daysContainer) {\n self.daysContainer = createElement(\"div\", \"flatpickr-days\");\n self.daysContainer.tabIndex = -1;\n }\n buildDays();\n self.rContainer.appendChild(self.daysContainer);\n self.innerContainer.appendChild(self.rContainer);\n fragment.appendChild(self.innerContainer);\n }\n if (self.config.enableTime) {\n fragment.appendChild(buildTime());\n }\n toggleClass(self.calendarContainer, \"rangeMode\", self.config.mode === \"range\");\n toggleClass(self.calendarContainer, \"animate\", self.config.animate === true);\n toggleClass(self.calendarContainer, \"multiMonth\", self.config.showMonths > 1);\n self.calendarContainer.appendChild(fragment);\n var customAppend = self.config.appendTo !== undefined &&\n self.config.appendTo.nodeType !== undefined;\n if (self.config.inline || self.config.static) {\n self.calendarContainer.classList.add(self.config.inline ? \"inline\" : \"static\");\n if (self.config.inline) {\n if (!customAppend && self.element.parentNode)\n self.element.parentNode.insertBefore(self.calendarContainer, self._input.nextSibling);\n else if (self.config.appendTo !== undefined)\n self.config.appendTo.appendChild(self.calendarContainer);\n }\n if (self.config.static) {\n var wrapper = createElement(\"div\", \"flatpickr-wrapper\");\n if (self.element.parentNode)\n self.element.parentNode.insertBefore(wrapper, self.element);\n wrapper.appendChild(self.element);\n if (self.altInput)\n wrapper.appendChild(self.altInput);\n wrapper.appendChild(self.calendarContainer);\n }\n }\n if (!self.config.static && !self.config.inline)\n (self.config.appendTo !== undefined\n ? self.config.appendTo\n : window.document.body).appendChild(self.calendarContainer);\n }\n function createDay(className, date, dayNumber, i) {\n var dateIsEnabled = isEnabled(date, true), dayElement = createElement(\"span\", \"flatpickr-day \" + className, date.getDate().toString());\n dayElement.dateObj = date;\n dayElement.$i = i;\n dayElement.setAttribute(\"aria-label\", self.formatDate(date, self.config.ariaDateFormat));\n if (className.indexOf(\"hidden\") === -1 &&\n compareDates(date, self.now) === 0) {\n self.todayDateElem = dayElement;\n dayElement.classList.add(\"today\");\n dayElement.setAttribute(\"aria-current\", \"date\");\n }\n if (dateIsEnabled) {\n dayElement.tabIndex = -1;\n if (isDateSelected(date)) {\n dayElement.classList.add(\"selected\");\n self.selectedDateElem = dayElement;\n if (self.config.mode === \"range\") {\n toggleClass(dayElement, \"startRange\", self.selectedDates[0] &&\n compareDates(date, self.selectedDates[0], true) === 0);\n toggleClass(dayElement, \"endRange\", self.selectedDates[1] &&\n compareDates(date, self.selectedDates[1], true) === 0);\n if (className === \"nextMonthDay\")\n dayElement.classList.add(\"inRange\");\n }\n }\n }\n else {\n dayElement.classList.add(\"flatpickr-disabled\");\n }\n if (self.config.mode === \"range\") {\n if (isDateInRange(date) && !isDateSelected(date))\n dayElement.classList.add(\"inRange\");\n }\n if (self.weekNumbers &&\n self.config.showMonths === 1 &&\n className !== \"prevMonthDay\" &&\n dayNumber % 7 === 1) {\n self.weekNumbers.insertAdjacentHTML(\"beforeend\", \"<span class='flatpickr-day'>\" + self.config.getWeek(date) + \"</span>\");\n }\n triggerEvent(\"onDayCreate\", dayElement);\n return dayElement;\n }\n function focusOnDayElem(targetNode) {\n targetNode.focus();\n if (self.config.mode === \"range\")\n onMouseOver(targetNode);\n }\n function getFirstAvailableDay(delta) {\n var startMonth = delta > 0 ? 0 : self.config.showMonths - 1;\n var endMonth = delta > 0 ? self.config.showMonths : -1;\n for (var m = startMonth; m != endMonth; m += delta) {\n var month = self.daysContainer.children[m];\n var startIndex = delta > 0 ? 0 : month.children.length - 1;\n var endIndex = delta > 0 ? month.children.length : -1;\n for (var i = startIndex; i != endIndex; i += delta) {\n var c = month.children[i];\n if (c.className.indexOf(\"hidden\") === -1 && isEnabled(c.dateObj))\n return c;\n }\n }\n return undefined;\n }\n function getNextAvailableDay(current, delta) {\n var givenMonth = current.className.indexOf(\"Month\") === -1\n ? current.dateObj.getMonth()\n : self.currentMonth;\n var endMonth = delta > 0 ? self.config.showMonths : -1;\n var loopDelta = delta > 0 ? 1 : -1;\n for (var m = givenMonth - self.currentMonth; m != endMonth; m += loopDelta) {\n var month = self.daysContainer.children[m];\n var startIndex = givenMonth - self.currentMonth === m\n ? current.$i + delta\n : delta < 0\n ? month.children.length - 1\n : 0;\n var numMonthDays = month.children.length;\n for (var i = startIndex; i >= 0 && i < numMonthDays && i != (delta > 0 ? numMonthDays : -1); i += loopDelta) {\n var c = month.children[i];\n if (c.className.indexOf(\"hidden\") === -1 &&\n isEnabled(c.dateObj) &&\n Math.abs(current.$i - i) >= Math.abs(delta))\n return focusOnDayElem(c);\n }\n }\n self.changeMonth(loopDelta);\n focusOnDay(getFirstAvailableDay(loopDelta), 0);\n return undefined;\n }\n function focusOnDay(current, offset) {\n var dayFocused = isInView(document.activeElement || document.body);\n var startElem = current !== undefined\n ? current\n : dayFocused\n ? document.activeElement\n : self.selectedDateElem !== undefined && isInView(self.selectedDateElem)\n ? self.selectedDateElem\n : self.todayDateElem !== undefined && isInView(self.todayDateElem)\n ? self.todayDateElem\n : getFirstAvailableDay(offset > 0 ? 1 : -1);\n if (startElem === undefined)\n return self._input.focus();\n if (!dayFocused)\n return focusOnDayElem(startElem);\n getNextAvailableDay(startElem, offset);\n }\n function buildMonthDays(year, month) {\n var firstOfMonth = (new Date(year, month, 1).getDay() - self.l10n.firstDayOfWeek + 7) % 7;\n var prevMonthDays = self.utils.getDaysInMonth((month - 1 + 12) % 12);\n var daysInMonth = self.utils.getDaysInMonth(month), days = window.document.createDocumentFragment(), isMultiMonth = self.config.showMonths > 1, prevMonthDayClass = isMultiMonth ? \"prevMonthDay hidden\" : \"prevMonthDay\", nextMonthDayClass = isMultiMonth ? \"nextMonthDay hidden\" : \"nextMonthDay\";\n var dayNumber = prevMonthDays + 1 - firstOfMonth, dayIndex = 0;\n // prepend days from the ending of previous month\n for (; dayNumber <= prevMonthDays; dayNumber++, dayIndex++) {\n days.appendChild(createDay(prevMonthDayClass, new Date(year, month - 1, dayNumber), dayNumber, dayIndex));\n }\n // Start at 1 since there is no 0th day\n for (dayNumber = 1; dayNumber <= daysInMonth; dayNumber++, dayIndex++) {\n days.appendChild(createDay(\"\", new Date(year, month, dayNumber), dayNumber, dayIndex));\n }\n // append days from the next month\n for (var dayNum = daysInMonth + 1; dayNum <= 42 - firstOfMonth &&\n (self.config.showMonths === 1 || dayIndex % 7 !== 0); dayNum++, dayIndex++) {\n days.appendChild(createDay(nextMonthDayClass, new Date(year, month + 1, dayNum % daysInMonth), dayNum, dayIndex));\n }\n //updateNavigationCurrentMonth();\n var dayContainer = createElement(\"div\", \"dayContainer\");\n dayContainer.appendChild(days);\n return dayContainer;\n }\n function buildDays() {\n if (self.daysContainer === undefined) {\n return;\n }\n clearNode(self.daysContainer);\n // TODO: week numbers for each month\n if (self.weekNumbers)\n clearNode(self.weekNumbers);\n var frag = document.createDocumentFragment();\n for (var i = 0; i < self.config.showMonths; i++) {\n var d = new Date(self.currentYear, self.currentMonth, 1);\n d.setMonth(self.currentMonth + i);\n frag.appendChild(buildMonthDays(d.getFullYear(), d.getMonth()));\n }\n self.daysContainer.appendChild(frag);\n self.days = self.daysContainer.firstChild;\n if (self.config.mode === \"range\" && self.selectedDates.length === 1) {\n onMouseOver();\n }\n }\n function buildMonthSwitch() {\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType !== \"dropdown\")\n return;\n var shouldBuildMonth = function (month) {\n if (self.config.minDate !== undefined &&\n self.currentYear === self.config.minDate.getFullYear() &&\n month < self.config.minDate.getMonth()) {\n return false;\n }\n return !(self.config.maxDate !== undefined &&\n self.currentYear === self.config.maxDate.getFullYear() &&\n month > self.config.maxDate.getMonth());\n };\n self.monthsDropdownContainer.tabIndex = -1;\n self.monthsDropdownContainer.innerHTML = \"\";\n for (var i = 0; i < 12; i++) {\n if (!shouldBuildMonth(i))\n continue;\n var month = createElement(\"option\", \"flatpickr-monthDropdown-month\");\n month.value = new Date(self.currentYear, i).getMonth().toString();\n month.textContent = monthToStr(i, self.config.shorthandCurrentMonth, self.l10n);\n month.tabIndex = -1;\n if (self.currentMonth === i) {\n month.selected = true;\n }\n self.monthsDropdownContainer.appendChild(month);\n }\n }\n function buildMonth() {\n var container = createElement(\"div\", \"flatpickr-month\");\n var monthNavFragment = window.document.createDocumentFragment();\n var monthElement;\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType === \"static\") {\n monthElement = createElement(\"span\", \"cur-month\");\n }\n else {\n self.monthsDropdownContainer = createElement(\"select\", \"flatpickr-monthDropdown-months\");\n bind(self.monthsDropdownContainer, \"change\", function (e) {\n var target = e.target;\n var selectedMonth = parseInt(target.value, 10);\n self.changeMonth(selectedMonth - self.currentMonth);\n triggerEvent(\"onMonthChange\");\n });\n buildMonthSwitch();\n monthElement = self.monthsDropdownContainer;\n }\n var yearInput = createNumberInput(\"cur-year\", { tabindex: \"-1\" });\n var yearElement = yearInput.getElementsByTagName(\"input\")[0];\n yearElement.setAttribute(\"aria-label\", self.l10n.yearAriaLabel);\n if (self.config.minDate) {\n yearElement.setAttribute(\"min\", self.config.minDate.getFullYear().toString());\n }\n if (self.config.maxDate) {\n yearElement.setAttribute(\"max\", self.config.maxDate.getFullYear().toString());\n yearElement.disabled =\n !!self.config.minDate &&\n self.config.minDate.getFullYear() === self.config.maxDate.getFullYear();\n }\n var currentMonth = createElement(\"div\", \"flatpickr-current-month\");\n currentMonth.appendChild(monthElement);\n currentMonth.appendChild(yearInput);\n monthNavFragment.appendChild(currentMonth);\n container.appendChild(monthNavFragment);\n return {\n container: container,\n yearElement: yearElement,\n monthElement: monthElement\n };\n }\n function buildMonths() {\n clearNode(self.monthNav);\n self.monthNav.appendChild(self.prevMonthNav);\n if (self.config.showMonths) {\n self.yearElements = [];\n self.monthElements = [];\n }\n for (var m = self.config.showMonths; m--;) {\n var month = buildMonth();\n self.yearElements.push(month.yearElement);\n self.monthElements.push(month.monthElement);\n self.monthNav.appendChild(month.container);\n }\n self.monthNav.appendChild(self.nextMonthNav);\n }\n function buildMonthNav() {\n self.monthNav = createElement(\"div\", \"flatpickr-months\");\n self.yearElements = [];\n self.monthElements = [];\n self.prevMonthNav = createElement(\"span\", \"flatpickr-prev-month\");\n self.prevMonthNav.innerHTML = self.config.prevArrow;\n self.nextMonthNav = createElement(\"span\", \"flatpickr-next-month\");\n self.nextMonthNav.innerHTML = self.config.nextArrow;\n buildMonths();\n Object.defineProperty(self, \"_hidePrevMonthArrow\", {\n get: function () { return self.__hidePrevMonthArrow; },\n set: function (bool) {\n if (self.__hidePrevMonthArrow !== bool) {\n toggleClass(self.prevMonthNav, \"flatpickr-disabled\", bool);\n self.__hidePrevMonthArrow = bool;\n }\n }\n });\n Object.defineProperty(self, \"_hideNextMonthArrow\", {\n get: function () { return self.__hideNextMonthArrow; },\n set: function (bool) {\n if (self.__hideNextMonthArrow !== bool) {\n toggleClass(self.nextMonthNav, \"flatpickr-disabled\", bool);\n self.__hideNextMonthArrow = bool;\n }\n }\n });\n self.currentYearElement = self.yearElements[0];\n updateNavigationCurrentMonth();\n return self.monthNav;\n }\n function buildTime() {\n self.calendarContainer.classList.add(\"hasTime\");\n if (self.config.noCalendar)\n self.calendarContainer.classList.add(\"noCalendar\");\n self.timeContainer = createElement(\"div\", \"flatpickr-time\");\n self.timeContainer.tabIndex = -1;\n var separator = createElement(\"span\", \"flatpickr-time-separator\", \":\");\n var hourInput = createNumberInput(\"flatpickr-hour\", {\n \"aria-label\": self.l10n.hourAriaLabel\n });\n self.hourElement = hourInput.getElementsByTagName(\"input\")[0];\n var minuteInput = createNumberInput(\"flatpickr-minute\", {\n \"aria-label\": self.l10n.minuteAriaLabel\n });\n self.minuteElement = minuteInput.getElementsByTagName(\"input\")[0];\n self.hourElement.tabIndex = self.minuteElement.tabIndex = -1;\n self.hourElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getHours()\n : self.config.time_24hr\n ? self.config.defaultHour\n : military2ampm(self.config.defaultHour));\n self.minuteElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getMinutes()\n : self.config.defaultMinute);\n self.hourElement.setAttribute(\"step\", self.config.hourIncrement.toString());\n self.minuteElement.setAttribute(\"step\", self.config.minuteIncrement.toString());\n self.hourElement.setAttribute(\"min\", self.config.time_24hr ? \"0\" : \"1\");\n self.hourElement.setAttribute(\"max\", self.config.time_24hr ? \"23\" : \"12\");\n self.minuteElement.setAttribute(\"min\", \"0\");\n self.minuteElement.setAttribute(\"max\", \"59\");\n self.timeContainer.appendChild(hourInput);\n self.timeContainer.appendChild(separator);\n self.timeContainer.appendChild(minuteInput);\n if (self.config.time_24hr)\n self.timeContainer.classList.add(\"time24hr\");\n if (self.config.enableSeconds) {\n self.timeContainer.classList.add(\"hasSeconds\");\n var secondInput = createNumberInput(\"flatpickr-second\");\n self.secondElement = secondInput.getElementsByTagName(\"input\")[0];\n self.secondElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getSeconds()\n : self.config.defaultSeconds);\n self.secondElement.setAttribute(\"step\", self.minuteElement.getAttribute(\"step\"));\n self.secondElement.setAttribute(\"min\", \"0\");\n self.secondElement.setAttribute(\"max\", \"59\");\n self.timeContainer.appendChild(createElement(\"span\", \"flatpickr-time-separator\", \":\"));\n self.timeContainer.appendChild(secondInput);\n }\n if (!self.config.time_24hr) {\n // add self.amPM if appropriate\n self.amPM = createElement(\"span\", \"flatpickr-am-pm\", self.l10n.amPM[int((self.latestSelectedDateObj\n ? self.hourElement.value\n : self.config.defaultHour) > 11)]);\n self.amPM.title = self.l10n.toggleTitle;\n self.amPM.tabIndex = -1;\n self.timeContainer.appendChild(self.amPM);\n }\n return self.timeContainer;\n }\n function buildWeekdays() {\n if (!self.weekdayContainer)\n self.weekdayContainer = createElement(\"div\", \"flatpickr-weekdays\");\n else\n clearNode(self.weekdayContainer);\n for (var i = self.config.showMonths; i--;) {\n var container = createElement(\"div\", \"flatpickr-weekdaycontainer\");\n self.weekdayContainer.appendChild(container);\n }\n updateWeekdays();\n return self.weekdayContainer;\n }\n function updateWeekdays() {\n if (!self.weekdayContainer) {\n return;\n }\n var firstDayOfWeek = self.l10n.firstDayOfWeek;\n var weekdays = self.l10n.weekdays.shorthand.slice();\n if (firstDayOfWeek > 0 && firstDayOfWeek < weekdays.length) {\n weekdays = weekdays.splice(firstDayOfWeek, weekdays.length).concat(weekdays.splice(0, firstDayOfWeek));\n }\n for (var i = self.config.showMonths; i--;) {\n self.weekdayContainer.children[i].innerHTML = \"\\n <span class='flatpickr-weekday'>\\n \" + weekdays.join(\"</span><span class='flatpickr-weekday'>\") + \"\\n </span>\\n \";\n }\n }\n /* istanbul ignore next */\n function buildWeeks() {\n self.calendarContainer.classList.add(\"hasWeeks\");\n var weekWrapper = createElement(\"div\", \"flatpickr-weekwrapper\");\n weekWrapper.appendChild(createElement(\"span\", \"flatpickr-weekday\", self.l10n.weekAbbreviation));\n var weekNumbers = createElement(\"div\", \"flatpickr-weeks\");\n weekWrapper.appendChild(weekNumbers);\n return {\n weekWrapper: weekWrapper,\n weekNumbers: weekNumbers\n };\n }\n function changeMonth(value, isOffset) {\n if (isOffset === void 0) { isOffset = true; }\n var delta = isOffset ? value : value - self.currentMonth;\n if ((delta < 0 && self._hidePrevMonthArrow === true) ||\n (delta > 0 && self._hideNextMonthArrow === true))\n return;\n self.currentMonth += delta;\n if (self.currentMonth < 0 || self.currentMonth > 11) {\n self.currentYear += self.currentMonth > 11 ? 1 : -1;\n self.currentMonth = (self.currentMonth + 12) % 12;\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n buildDays();\n triggerEvent(\"onMonthChange\");\n updateNavigationCurrentMonth();\n }\n function clear(triggerChangeEvent, toInitial) {\n if (triggerChangeEvent === void 0) { triggerChangeEvent = true; }\n if (toInitial === void 0) { toInitial = true; }\n self.input.value = \"\";\n if (self.altInput !== undefined)\n self.altInput.value = \"\";\n if (self.mobileInput !== undefined)\n self.mobileInput.value = \"\";\n self.selectedDates = [];\n self.latestSelectedDateObj = undefined;\n if (toInitial === true) {\n self.currentYear = self._initialDate.getFullYear();\n self.currentMonth = self._initialDate.getMonth();\n }\n self.showTimeInput = false;\n if (self.config.enableTime === true) {\n setDefaultHours();\n }\n self.redraw();\n if (triggerChangeEvent)\n // triggerChangeEvent is true (default) or an Event\n triggerEvent(\"onChange\");\n }\n function close() {\n self.isOpen = false;\n if (!self.isMobile) {\n if (self.calendarContainer !== undefined) {\n self.calendarContainer.classList.remove(\"open\");\n }\n if (self._input !== undefined) {\n self._input.classList.remove(\"active\");\n }\n }\n triggerEvent(\"onClose\");\n }\n function destroy() {\n if (self.config !== undefined)\n triggerEvent(\"onDestroy\");\n for (var i = self._handlers.length; i--;) {\n var h = self._handlers[i];\n h.element.removeEventListener(h.event, h.handler, h.options);\n }\n self._handlers = [];\n if (self.mobileInput) {\n if (self.mobileInput.parentNode)\n self.mobileInput.parentNode.removeChild(self.mobileInput);\n self.mobileInput = undefined;\n }\n else if (self.calendarContainer && self.calendarContainer.parentNode) {\n if (self.config.static && self.calendarContainer.parentNode) {\n var wrapper = self.calendarContainer.parentNode;\n wrapper.lastChild && wrapper.removeChild(wrapper.lastChild);\n if (wrapper.parentNode) {\n while (wrapper.firstChild)\n wrapper.parentNode.insertBefore(wrapper.firstChild, wrapper);\n wrapper.parentNode.removeChild(wrapper);\n }\n }\n else\n self.calendarContainer.parentNode.removeChild(self.calendarContainer);\n }\n if (self.altInput) {\n self.input.type = \"text\";\n if (self.altInput.parentNode)\n self.altInput.parentNode.removeChild(self.altInput);\n delete self.altInput;\n }\n if (self.input) {\n self.input.type = self.input._type;\n self.input.classList.remove(\"flatpickr-input\");\n self.input.removeAttribute(\"readonly\");\n self.input.value = \"\";\n }\n [\n \"_showTimeInput\",\n \"latestSelectedDateObj\",\n \"_hideNextMonthArrow\",\n \"_hidePrevMonthArrow\",\n \"__hideNextMonthArrow\",\n \"__hidePrevMonthArrow\",\n \"isMobile\",\n \"isOpen\",\n \"selectedDateElem\",\n \"minDateHasTime\",\n \"maxDateHasTime\",\n \"days\",\n \"daysContainer\",\n \"_input\",\n \"_positionElement\",\n \"innerContainer\",\n \"rContainer\",\n \"monthNav\",\n \"todayDateElem\",\n \"calendarContainer\",\n \"weekdayContainer\",\n \"prevMonthNav\",\n \"nextMonthNav\",\n \"monthsDropdownContainer\",\n \"currentMonthElement\",\n \"currentYearElement\",\n \"navigationCurrentMonth\",\n \"selectedDateElem\",\n \"config\",\n ].forEach(function (k) {\n try {\n delete self[k];\n }\n catch (_) { }\n });\n }\n function isCalendarElem(elem) {\n if (self.config.appendTo && self.config.appendTo.contains(elem))\n return true;\n return self.calendarContainer.contains(elem);\n }\n function documentClick(e) {\n if (self.isOpen && !self.config.inline) {\n var eventTarget_1 = getEventTarget(e);\n var isCalendarElement = isCalendarElem(eventTarget_1);\n var isInput = eventTarget_1 === self.input ||\n eventTarget_1 === self.altInput ||\n self.element.contains(eventTarget_1) ||\n // web components\n // e.path is not present in all browsers. circumventing typechecks\n (e.path &&\n e.path.indexOf &&\n (~e.path.indexOf(self.input) ||\n ~e.path.indexOf(self.altInput)));\n var lostFocus = e.type === \"blur\"\n ? isInput &&\n e.relatedTarget &&\n !isCalendarElem(e.relatedTarget)\n : !isInput &&\n !isCalendarElement &&\n !isCalendarElem(e.relatedTarget);\n var isIgnored = !self.config.ignoredFocusElements.some(function (elem) {\n return elem.contains(eventTarget_1);\n });\n if (lostFocus && isIgnored) {\n if (self.timeContainer !== undefined &&\n self.minuteElement !== undefined &&\n self.hourElement !== undefined) {\n updateTime();\n }\n self.close();\n if (self.config.mode === \"range\" && self.selectedDates.length === 1) {\n self.clear(false);\n self.redraw();\n }\n }\n }\n }\n function changeYear(newYear) {\n if (!newYear ||\n (self.config.minDate && newYear < self.config.minDate.getFullYear()) ||\n (self.config.maxDate && newYear > self.config.maxDate.getFullYear()))\n return;\n var newYearNum = newYear, isNewYear = self.currentYear !== newYearNum;\n self.currentYear = newYearNum || self.currentYear;\n if (self.config.maxDate &&\n self.currentYear === self.config.maxDate.getFullYear()) {\n self.currentMonth = Math.min(self.config.maxDate.getMonth(), self.currentMonth);\n }\n else if (self.config.minDate &&\n self.currentYear === self.config.minDate.getFullYear()) {\n self.currentMonth = Math.max(self.config.minDate.getMonth(), self.currentMonth);\n }\n if (isNewYear) {\n self.redraw();\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n }\n function isEnabled(date, timeless) {\n if (timeless === void 0) { timeless = true; }\n var dateToCheck = self.parseDate(date, undefined, timeless); // timeless\n if ((self.config.minDate &&\n dateToCheck &&\n compareDates(dateToCheck, self.config.minDate, timeless !== undefined ? timeless : !self.minDateHasTime) < 0) ||\n (self.config.maxDate &&\n dateToCheck &&\n compareDates(dateToCheck, self.config.maxDate, timeless !== undefined ? timeless : !self.maxDateHasTime) > 0))\n return false;\n if (self.config.enable.length === 0 && self.config.disable.length === 0)\n return true;\n if (dateToCheck === undefined)\n return false;\n var bool = self.config.enable.length > 0, array = bool ? self.config.enable : self.config.disable;\n for (var i = 0, d = void 0; i < array.length; i++) {\n d = array[i];\n if (typeof d === \"function\" &&\n d(dateToCheck) // disabled by function\n )\n return bool;\n else if (d instanceof Date &&\n dateToCheck !== undefined &&\n d.getTime() === dateToCheck.getTime())\n // disabled by date\n return bool;\n else if (typeof d === \"string\" && dateToCheck !== undefined) {\n // disabled by date string\n var parsed = self.parseDate(d, undefined, true);\n return parsed && parsed.getTime() === dateToCheck.getTime()\n ? bool\n : !bool;\n }\n else if (\n // disabled by range\n typeof d === \"object\" &&\n dateToCheck !== undefined &&\n d.from &&\n d.to &&\n dateToCheck.getTime() >= d.from.getTime() &&\n dateToCheck.getTime() <= d.to.getTime())\n return bool;\n }\n return !bool;\n }\n function isInView(elem) {\n if (self.daysContainer !== undefined)\n return (elem.className.indexOf(\"hidden\") === -1 &&\n self.daysContainer.contains(elem));\n return false;\n }\n function onKeyDown(e) {\n // e.key e.keyCode\n // \"Backspace\" 8\n // \"Tab\" 9\n // \"Enter\" 13\n // \"Escape\" (IE \"Esc\") 27\n // \"ArrowLeft\" (IE \"Left\") 37\n // \"ArrowUp\" (IE \"Up\") 38\n // \"ArrowRight\" (IE \"Right\") 39\n // \"ArrowDown\" (IE \"Down\") 40\n // \"Delete\" (IE \"Del\") 46\n var isInput = e.target === self._input;\n var allowInput = self.config.allowInput;\n var allowKeydown = self.isOpen && (!allowInput || !isInput);\n var allowInlineKeydown = self.config.inline && isInput && !allowInput;\n if (e.keyCode === 13 && isInput) {\n if (allowInput) {\n self.setDate(self._input.value, true, e.target === self.altInput\n ? self.config.altFormat\n : self.config.dateFormat);\n return e.target.blur();\n }\n else {\n self.open();\n }\n }\n else if (isCalendarElem(e.target) ||\n allowKeydown ||\n allowInlineKeydown) {\n var isTimeObj = !!self.timeContainer &&\n self.timeContainer.contains(e.target);\n switch (e.keyCode) {\n case 13:\n if (isTimeObj) {\n e.preventDefault();\n updateTime();\n focusAndClose();\n }\n else\n selectDate(e);\n break;\n case 27: // escape\n e.preventDefault();\n focusAndClose();\n break;\n case 8:\n case 46:\n if (isInput && !self.config.allowInput) {\n e.preventDefault();\n self.clear();\n }\n break;\n case 37:\n case 39:\n if (!isTimeObj && !isInput) {\n e.preventDefault();\n if (self.daysContainer !== undefined &&\n (allowInput === false ||\n (document.activeElement && isInView(document.activeElement)))) {\n var delta_1 = e.keyCode === 39 ? 1 : -1;\n if (!e.ctrlKey)\n focusOnDay(undefined, delta_1);\n else {\n e.stopPropagation();\n changeMonth(delta_1);\n focusOnDay(getFirstAvailableDay(1), 0);\n }\n }\n }\n else if (self.hourElement)\n self.hourElement.focus();\n break;\n case 38:\n case 40:\n e.preventDefault();\n var delta = e.keyCode === 40 ? 1 : -1;\n if ((self.daysContainer && e.target.$i !== undefined) ||\n e.target === self.input ||\n e.target === self.altInput) {\n if (e.ctrlKey) {\n e.stopPropagation();\n changeYear(self.currentYear - delta);\n focusOnDay(getFirstAvailableDay(1), 0);\n }\n else if (!isTimeObj)\n focusOnDay(undefined, delta * 7);\n }\n else if (e.target === self.currentYearElement) {\n changeYear(self.currentYear - delta);\n }\n else if (self.config.enableTime) {\n if (!isTimeObj && self.hourElement)\n self.hourElement.focus();\n updateTime(e);\n self._debouncedChange();\n }\n break;\n case 9:\n if (isTimeObj) {\n var elems = [\n self.hourElement,\n self.minuteElement,\n self.secondElement,\n self.amPM,\n ]\n .concat(self.pluginElements)\n .filter(function (x) { return x; });\n var i = elems.indexOf(e.target);\n if (i !== -1) {\n var target = elems[i + (e.shiftKey ? -1 : 1)];\n e.preventDefault();\n (target || self._input).focus();\n }\n }\n else if (!self.config.noCalendar &&\n self.daysContainer &&\n self.daysContainer.contains(e.target) &&\n e.shiftKey) {\n e.preventDefault();\n self._input.focus();\n }\n break;\n default:\n break;\n }\n }\n if (self.amPM !== undefined && e.target === self.amPM) {\n switch (e.key) {\n case self.l10n.amPM[0].charAt(0):\n case self.l10n.amPM[0].charAt(0).toLowerCase():\n self.amPM.textContent = self.l10n.amPM[0];\n setHoursFromInputs();\n updateValue();\n break;\n case self.l10n.amPM[1].charAt(0):\n case self.l10n.amPM[1].charAt(0).toLowerCase():\n self.amPM.textContent = self.l10n.amPM[1];\n setHoursFromInputs();\n updateValue();\n break;\n }\n }\n if (isInput || isCalendarElem(e.target)) {\n triggerEvent(\"onKeyDown\", e);\n }\n }\n function onMouseOver(elem) {\n if (self.selectedDates.length !== 1 ||\n (elem &&\n (!elem.classList.contains(\"flatpickr-day\") ||\n elem.classList.contains(\"flatpickr-disabled\"))))\n return;\n var hoverDate = elem\n ? elem.dateObj.getTime()\n : self.days.firstElementChild.dateObj.getTime(), initialDate = self.parseDate(self.selectedDates[0], undefined, true).getTime(), rangeStartDate = Math.min(hoverDate, self.selectedDates[0].getTime()), rangeEndDate = Math.max(hoverDate, self.selectedDates[0].getTime());\n var containsDisabled = false;\n var minRange = 0, maxRange = 0;\n for (var t = rangeStartDate; t < rangeEndDate; t += duration.DAY) {\n if (!isEnabled(new Date(t), true)) {\n containsDisabled =\n containsDisabled || (t > rangeStartDate && t < rangeEndDate);\n if (t < initialDate && (!minRange || t > minRange))\n minRange = t;\n else if (t > initialDate && (!maxRange || t < maxRange))\n maxRange = t;\n }\n }\n for (var m = 0; m < self.config.showMonths; m++) {\n var month = self.daysContainer.children[m];\n var _loop_1 = function (i, l) {\n var dayElem = month.children[i], date = dayElem.dateObj;\n var timestamp = date.getTime();\n var outOfRange = (minRange > 0 && timestamp < minRange) ||\n (maxRange > 0 && timestamp > maxRange);\n if (outOfRange) {\n dayElem.classList.add(\"notAllowed\");\n [\"inRange\", \"startRange\", \"endRange\"].forEach(function (c) {\n dayElem.classList.remove(c);\n });\n return \"continue\";\n }\n else if (containsDisabled && !outOfRange)\n return \"continue\";\n [\"startRange\", \"inRange\", \"endRange\", \"notAllowed\"].forEach(function (c) {\n dayElem.classList.remove(c);\n });\n if (elem !== undefined) {\n elem.classList.add(hoverDate <= self.selectedDates[0].getTime()\n ? \"startRange\"\n : \"endRange\");\n if (initialDate < hoverDate && timestamp === initialDate)\n dayElem.classList.add(\"startRange\");\n else if (initialDate > hoverDate && timestamp === initialDate)\n dayElem.classList.add(\"endRange\");\n if (timestamp >= minRange &&\n (maxRange === 0 || timestamp <= maxRange) &&\n isBetween(timestamp, initialDate, hoverDate))\n dayElem.classList.add(\"inRange\");\n }\n };\n for (var i = 0, l = month.children.length; i < l; i++) {\n _loop_1(i, l);\n }\n }\n }\n function onResize() {\n if (self.isOpen && !self.config.static && !self.config.inline)\n positionCalendar();\n }\n function setDefaultTime() {\n self.setDate(self.config.minDate !== undefined\n ? new Date(self.config.minDate.getTime())\n : new Date(), true);\n setDefaultHours();\n updateValue();\n }\n function open(e, positionElement) {\n if (positionElement === void 0) { positionElement = self._positionElement; }\n if (self.isMobile === true) {\n if (e) {\n e.preventDefault();\n e.target && e.target.blur();\n }\n if (self.mobileInput !== undefined) {\n self.mobileInput.focus();\n self.mobileInput.click();\n }\n triggerEvent(\"onOpen\");\n return;\n }\n if (self._input.disabled || self.config.inline)\n return;\n var wasOpen = self.isOpen;\n self.isOpen = true;\n if (!wasOpen) {\n self.calendarContainer.classList.add(\"open\");\n self._input.classList.add(\"active\");\n triggerEvent(\"onOpen\");\n positionCalendar(positionElement);\n }\n if (self.config.enableTime === true && self.config.noCalendar === true) {\n if (self.selectedDates.length === 0) {\n setDefaultTime();\n }\n if (self.config.allowInput === false &&\n (e === undefined ||\n !self.timeContainer.contains(e.relatedTarget))) {\n setTimeout(function () { return self.hourElement.select(); }, 50);\n }\n }\n }\n function minMaxDateSetter(type) {\n return function (date) {\n var dateObj = (self.config[\"_\" + type + \"Date\"] = self.parseDate(date, self.config.dateFormat));\n var inverseDateObj = self.config[\"_\" + (type === \"min\" ? \"max\" : \"min\") + \"Date\"];\n if (dateObj !== undefined) {\n self[type === \"min\" ? \"minDateHasTime\" : \"maxDateHasTime\"] =\n dateObj.getHours() > 0 ||\n dateObj.getMinutes() > 0 ||\n dateObj.getSeconds() > 0;\n }\n if (self.selectedDates) {\n self.selectedDates = self.selectedDates.filter(function (d) { return isEnabled(d); });\n if (!self.selectedDates.length && type === \"min\")\n setHoursFromDate(dateObj);\n updateValue();\n }\n if (self.daysContainer) {\n redraw();\n if (dateObj !== undefined)\n self.currentYearElement[type] = dateObj.getFullYear().toString();\n else\n self.currentYearElement.removeAttribute(type);\n self.currentYearElement.disabled =\n !!inverseDateObj &&\n dateObj !== undefined &&\n inverseDateObj.getFullYear() === dateObj.getFullYear();\n }\n };\n }\n function parseConfig() {\n var boolOpts = [\n \"wrap\",\n \"weekNumbers\",\n \"allowInput\",\n \"clickOpens\",\n \"time_24hr\",\n \"enableTime\",\n \"noCalendar\",\n \"altInput\",\n \"shorthandCurrentMonth\",\n \"inline\",\n \"static\",\n \"enableSeconds\",\n \"disableMobile\",\n ];\n var userConfig = __assign({}, instanceConfig, JSON.parse(JSON.stringify(element.dataset || {})));\n var formats = {};\n self.config.parseDate = userConfig.parseDate;\n self.config.formatDate = userConfig.formatDate;\n Object.defineProperty(self.config, \"enable\", {\n get: function () { return self.config._enable; },\n set: function (dates) {\n self.config._enable = parseDateRules(dates);\n }\n });\n Object.defineProperty(self.config, \"disable\", {\n get: function () { return self.config._disable; },\n set: function (dates) {\n self.config._disable = parseDateRules(dates);\n }\n });\n var timeMode = userConfig.mode === \"time\";\n if (!userConfig.dateFormat && (userConfig.enableTime || timeMode)) {\n var defaultDateFormat = flatpickr.defaultConfig.dateFormat || defaults.dateFormat;\n formats.dateFormat =\n userConfig.noCalendar || timeMode\n ? \"H:i\" + (userConfig.enableSeconds ? \":S\" : \"\")\n : defaultDateFormat + \" H:i\" + (userConfig.enableSeconds ? \":S\" : \"\");\n }\n if (userConfig.altInput &&\n (userConfig.enableTime || timeMode) &&\n !userConfig.altFormat) {\n var defaultAltFormat = flatpickr.defaultConfig.altFormat || defaults.altFormat;\n formats.altFormat =\n userConfig.noCalendar || timeMode\n ? \"h:i\" + (userConfig.enableSeconds ? \":S K\" : \" K\")\n : defaultAltFormat + (\" h:i\" + (userConfig.enableSeconds ? \":S\" : \"\") + \" K\");\n }\n if (!userConfig.altInputClass) {\n self.config.altInputClass =\n self.input.className + \" \" + self.config.altInputClass;\n }\n Object.defineProperty(self.config, \"minDate\", {\n get: function () { return self.config._minDate; },\n set: minMaxDateSetter(\"min\")\n });\n Object.defineProperty(self.config, \"maxDate\", {\n get: function () { return self.config._maxDate; },\n set: minMaxDateSetter(\"max\")\n });\n var minMaxTimeSetter = function (type) { return function (val) {\n self.config[type === \"min\" ? \"_minTime\" : \"_maxTime\"] = self.parseDate(val, \"H:i:S\");\n }; };\n Object.defineProperty(self.config, \"minTime\", {\n get: function () { return self.config._minTime; },\n set: minMaxTimeSetter(\"min\")\n });\n Object.defineProperty(self.config, \"maxTime\", {\n get: function () { return self.config._maxTime; },\n set: minMaxTimeSetter(\"max\")\n });\n if (userConfig.mode === \"time\") {\n self.config.noCalendar = true;\n self.config.enableTime = true;\n }\n Object.assign(self.config, formats, userConfig);\n for (var i = 0; i < boolOpts.length; i++)\n self.config[boolOpts[i]] =\n self.config[boolOpts[i]] === true ||\n self.config[boolOpts[i]] === \"true\";\n HOOKS.filter(function (hook) { return self.config[hook] !== undefined; }).forEach(function (hook) {\n self.config[hook] = arrayify(self.config[hook] || []).map(bindToInstance);\n });\n self.isMobile =\n !self.config.disableMobile &&\n !self.config.inline &&\n self.config.mode === \"single\" &&\n !self.config.disable.length &&\n !self.config.enable.length &&\n !self.config.weekNumbers &&\n /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);\n for (var i = 0; i < self.config.plugins.length; i++) {\n var pluginConf = self.config.plugins[i](self) || {};\n for (var key in pluginConf) {\n if (HOOKS.indexOf(key) > -1) {\n self.config[key] = arrayify(pluginConf[key])\n .map(bindToInstance)\n .concat(self.config[key]);\n }\n else if (typeof userConfig[key] === \"undefined\")\n self.config[key] = pluginConf[key];\n }\n }\n triggerEvent(\"onParseConfig\");\n }\n function setupLocale() {\n if (typeof self.config.locale !== \"object\" &&\n typeof flatpickr.l10ns[self.config.locale] === \"undefined\")\n self.config.errorHandler(new Error(\"flatpickr: invalid locale \" + self.config.locale));\n self.l10n = __assign({}, flatpickr.l10ns[\"default\"], (typeof self.config.locale === \"object\"\n ? self.config.locale\n : self.config.locale !== \"default\"\n ? flatpickr.l10ns[self.config.locale]\n : undefined));\n tokenRegex.K = \"(\" + self.l10n.amPM[0] + \"|\" + self.l10n.amPM[1] + \"|\" + self.l10n.amPM[0].toLowerCase() + \"|\" + self.l10n.amPM[1].toLowerCase() + \")\";\n var userConfig = __assign({}, instanceConfig, JSON.parse(JSON.stringify(element.dataset || {})));\n if (userConfig.time_24hr === undefined &&\n flatpickr.defaultConfig.time_24hr === undefined) {\n self.config.time_24hr = self.l10n.time_24hr;\n }\n self.formatDate = createDateFormatter(self);\n self.parseDate = createDateParser({ config: self.config, l10n: self.l10n });\n }\n function positionCalendar(customPositionElement) {\n if (self.calendarContainer === undefined)\n return;\n triggerEvent(\"onPreCalendarPosition\");\n var positionElement = customPositionElement || self._positionElement;\n var calendarHeight = Array.prototype.reduce.call(self.calendarContainer.children, (function (acc, child) { return acc + child.offsetHeight; }), 0), calendarWidth = self.calendarContainer.offsetWidth, configPos = self.config.position.split(\" \"), configPosVertical = configPos[0], configPosHorizontal = configPos.length > 1 ? configPos[1] : null, inputBounds = positionElement.getBoundingClientRect(), distanceFromBottom = window.innerHeight - inputBounds.bottom, showOnTop = configPosVertical === \"above\" ||\n (configPosVertical !== \"below\" &&\n distanceFromBottom < calendarHeight &&\n inputBounds.top > calendarHeight);\n var top = window.pageYOffset +\n inputBounds.top +\n (!showOnTop ? positionElement.offsetHeight + 2 : -calendarHeight - 2);\n toggleClass(self.calendarContainer, \"arrowTop\", !showOnTop);\n toggleClass(self.calendarContainer, \"arrowBottom\", showOnTop);\n if (self.config.inline)\n return;\n var left = window.pageXOffset +\n inputBounds.left -\n (configPosHorizontal != null && configPosHorizontal === \"center\"\n ? (calendarWidth - inputBounds.width) / 2\n : 0);\n var right = window.document.body.offsetWidth - (window.pageXOffset + inputBounds.right);\n var rightMost = left + calendarWidth > window.document.body.offsetWidth;\n var centerMost = right + calendarWidth > window.document.body.offsetWidth;\n toggleClass(self.calendarContainer, \"rightMost\", rightMost);\n if (self.config.static)\n return;\n self.calendarContainer.style.top = top + \"px\";\n if (!rightMost) {\n self.calendarContainer.style.left = left + \"px\";\n self.calendarContainer.style.right = \"auto\";\n }\n else if (!centerMost) {\n self.calendarContainer.style.left = \"auto\";\n self.calendarContainer.style.right = right + \"px\";\n }\n else {\n var doc = document.styleSheets[0];\n // some testing environments don't have css support\n if (doc === undefined)\n return;\n var bodyWidth = window.document.body.offsetWidth;\n var centerLeft = Math.max(0, bodyWidth / 2 - calendarWidth / 2);\n var centerBefore = \".flatpickr-calendar.centerMost:before\";\n var centerAfter = \".flatpickr-calendar.centerMost:after\";\n var centerIndex = doc.cssRules.length;\n var centerStyle = \"{left:\" + inputBounds.left + \"px;right:auto;}\";\n toggleClass(self.calendarContainer, \"rightMost\", false);\n toggleClass(self.calendarContainer, \"centerMost\", true);\n doc.insertRule(centerBefore + \",\" + centerAfter + centerStyle, centerIndex);\n self.calendarContainer.style.left = centerLeft + \"px\";\n self.calendarContainer.style.right = \"auto\";\n }\n }\n function redraw() {\n if (self.config.noCalendar || self.isMobile)\n return;\n updateNavigationCurrentMonth();\n buildDays();\n }\n function focusAndClose() {\n self._input.focus();\n if (window.navigator.userAgent.indexOf(\"MSIE\") !== -1 ||\n navigator.msMaxTouchPoints !== undefined) {\n // hack - bugs in the way IE handles focus keeps the calendar open\n setTimeout(self.close, 0);\n }\n else {\n self.close();\n }\n }\n function selectDate(e) {\n e.preventDefault();\n e.stopPropagation();\n var isSelectable = function (day) {\n return day.classList &&\n day.classList.contains(\"flatpickr-day\") &&\n !day.classList.contains(\"flatpickr-disabled\") &&\n !day.classList.contains(\"notAllowed\");\n };\n var t = findParent(e.target, isSelectable);\n if (t === undefined)\n return;\n var target = t;\n var selectedDate = (self.latestSelectedDateObj = new Date(target.dateObj.getTime()));\n var shouldChangeMonth = (selectedDate.getMonth() < self.currentMonth ||\n selectedDate.getMonth() >\n self.currentMonth + self.config.showMonths - 1) &&\n self.config.mode !== \"range\";\n self.selectedDateElem = target;\n if (self.config.mode === \"single\")\n self.selectedDates = [selectedDate];\n else if (self.config.mode === \"multiple\") {\n var selectedIndex = isDateSelected(selectedDate);\n if (selectedIndex)\n self.selectedDates.splice(parseInt(selectedIndex), 1);\n else\n self.selectedDates.push(selectedDate);\n }\n else if (self.config.mode === \"range\") {\n if (self.selectedDates.length === 2) {\n self.clear(false, false);\n }\n self.latestSelectedDateObj = selectedDate;\n self.selectedDates.push(selectedDate);\n // unless selecting same date twice, sort ascendingly\n if (compareDates(selectedDate, self.selectedDates[0], true) !== 0)\n self.selectedDates.sort(function (a, b) { return a.getTime() - b.getTime(); });\n }\n setHoursFromInputs();\n if (shouldChangeMonth) {\n var isNewYear = self.currentYear !== selectedDate.getFullYear();\n self.currentYear = selectedDate.getFullYear();\n self.currentMonth = selectedDate.getMonth();\n if (isNewYear) {\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n triggerEvent(\"onMonthChange\");\n }\n updateNavigationCurrentMonth();\n buildDays();\n updateValue();\n if (self.config.enableTime)\n setTimeout(function () { return (self.showTimeInput = true); }, 50);\n // maintain focus\n if (!shouldChangeMonth &&\n self.config.mode !== \"range\" &&\n self.config.showMonths === 1)\n focusOnDayElem(target);\n else if (self.selectedDateElem !== undefined &&\n self.hourElement === undefined) {\n self.selectedDateElem && self.selectedDateElem.focus();\n }\n if (self.hourElement !== undefined)\n self.hourElement !== undefined && self.hourElement.focus();\n if (self.config.closeOnSelect) {\n var single = self.config.mode === \"single\" && !self.config.enableTime;\n var range = self.config.mode === \"range\" &&\n self.selectedDates.length === 2 &&\n !self.config.enableTime;\n if (single || range) {\n focusAndClose();\n }\n }\n triggerChange();\n }\n var CALLBACKS = {\n locale: [setupLocale, updateWeekdays],\n showMonths: [buildMonths, setCalendarWidth, buildWeekdays],\n minDate: [jumpToDate],\n maxDate: [jumpToDate]\n };\n function set(option, value) {\n if (option !== null && typeof option === \"object\") {\n Object.assign(self.config, option);\n for (var key in option) {\n if (CALLBACKS[key] !== undefined)\n CALLBACKS[key].forEach(function (x) { return x(); });\n }\n }\n else {\n self.config[option] = value;\n if (CALLBACKS[option] !== undefined)\n CALLBACKS[option].forEach(function (x) { return x(); });\n else if (HOOKS.indexOf(option) > -1)\n self.config[option] = arrayify(value);\n }\n self.redraw();\n updateValue(false);\n }\n function setSelectedDate(inputDate, format) {\n var dates = [];\n if (inputDate instanceof Array)\n dates = inputDate.map(function (d) { return self.parseDate(d, format); });\n else if (inputDate instanceof Date || typeof inputDate === \"number\")\n dates = [self.parseDate(inputDate, format)];\n else if (typeof inputDate === \"string\") {\n switch (self.config.mode) {\n case \"single\":\n case \"time\":\n dates = [self.parseDate(inputDate, format)];\n break;\n case \"multiple\":\n dates = inputDate\n .split(self.config.conjunction)\n .map(function (date) { return self.parseDate(date, format); });\n break;\n case \"range\":\n dates = inputDate\n .split(self.l10n.rangeSeparator)\n .map(function (date) { return self.parseDate(date, format); });\n break;\n default:\n break;\n }\n }\n else\n self.config.errorHandler(new Error(\"Invalid date supplied: \" + JSON.stringify(inputDate)));\n self.selectedDates = dates.filter(function (d) { return d instanceof Date && isEnabled(d, false); });\n if (self.config.mode === \"range\")\n self.selectedDates.sort(function (a, b) { return a.getTime() - b.getTime(); });\n }\n function setDate(date, triggerChange, format) {\n if (triggerChange === void 0) { triggerChange = false; }\n if (format === void 0) { format = self.config.dateFormat; }\n if ((date !== 0 && !date) || (date instanceof Array && date.length === 0))\n return self.clear(triggerChange);\n setSelectedDate(date, format);\n self.showTimeInput = self.selectedDates.length > 0;\n self.latestSelectedDateObj =\n self.selectedDates[self.selectedDates.length - 1];\n self.redraw();\n jumpToDate();\n setHoursFromDate();\n if (self.selectedDates.length === 0) {\n self.clear(false);\n }\n updateValue(triggerChange);\n if (triggerChange)\n triggerEvent(\"onChange\");\n }\n function parseDateRules(arr) {\n return arr\n .slice()\n .map(function (rule) {\n if (typeof rule === \"string\" ||\n typeof rule === \"number\" ||\n rule instanceof Date) {\n return self.parseDate(rule, undefined, true);\n }\n else if (rule &&\n typeof rule === \"object\" &&\n rule.from &&\n rule.to)\n return {\n from: self.parseDate(rule.from, undefined),\n to: self.parseDate(rule.to, undefined)\n };\n return rule;\n })\n .filter(function (x) { return x; }); // remove falsy values\n }\n function setupDates() {\n self.selectedDates = [];\n self.now = self.parseDate(self.config.now) || new Date();\n // Workaround IE11 setting placeholder as the input's value\n var preloadedDate = self.config.defaultDate ||\n ((self.input.nodeName === \"INPUT\" ||\n self.input.nodeName === \"TEXTAREA\") &&\n self.input.placeholder &&\n self.input.value === self.input.placeholder\n ? null\n : self.input.value);\n if (preloadedDate)\n setSelectedDate(preloadedDate, self.config.dateFormat);\n self._initialDate =\n self.selectedDates.length > 0\n ? self.selectedDates[0]\n : self.config.minDate &&\n self.config.minDate.getTime() > self.now.getTime()\n ? self.config.minDate\n : self.config.maxDate &&\n self.config.maxDate.getTime() < self.now.getTime()\n ? self.config.maxDate\n : self.now;\n self.currentYear = self._initialDate.getFullYear();\n self.currentMonth = self._initialDate.getMonth();\n if (self.selectedDates.length > 0)\n self.latestSelectedDateObj = self.selectedDates[0];\n if (self.config.minTime !== undefined)\n self.config.minTime = self.parseDate(self.config.minTime, \"H:i\");\n if (self.config.maxTime !== undefined)\n self.config.maxTime = self.parseDate(self.config.maxTime, \"H:i\");\n self.minDateHasTime =\n !!self.config.minDate &&\n (self.config.minDate.getHours() > 0 ||\n self.config.minDate.getMinutes() > 0 ||\n self.config.minDate.getSeconds() > 0);\n self.maxDateHasTime =\n !!self.config.maxDate &&\n (self.config.maxDate.getHours() > 0 ||\n self.config.maxDate.getMinutes() > 0 ||\n self.config.maxDate.getSeconds() > 0);\n Object.defineProperty(self, \"showTimeInput\", {\n get: function () { return self._showTimeInput; },\n set: function (bool) {\n self._showTimeInput = bool;\n if (self.calendarContainer)\n toggleClass(self.calendarContainer, \"showTimeInput\", bool);\n self.isOpen && positionCalendar();\n }\n });\n }\n function setupInputs() {\n self.input = self.config.wrap\n ? element.querySelector(\"[data-input]\")\n : element;\n /* istanbul ignore next */\n if (!self.input) {\n self.config.errorHandler(new Error(\"Invalid input element specified\"));\n return;\n }\n // hack: store previous type to restore it after destroy()\n self.input._type = self.input.type;\n self.input.type = \"text\";\n self.input.classList.add(\"flatpickr-input\");\n self._input = self.input;\n if (self.config.altInput) {\n // replicate self.element\n self.altInput = createElement(self.input.nodeName, self.config.altInputClass);\n self._input = self.altInput;\n self.altInput.placeholder = self.input.placeholder;\n self.altInput.disabled = self.input.disabled;\n self.altInput.required = self.input.required;\n self.altInput.tabIndex = self.input.tabIndex;\n self.altInput.type = \"text\";\n self.input.setAttribute(\"type\", \"hidden\");\n if (!self.config.static && self.input.parentNode)\n self.input.parentNode.insertBefore(self.altInput, self.input.nextSibling);\n }\n if (!self.config.allowInput)\n self._input.setAttribute(\"readonly\", \"readonly\");\n self._positionElement = self.config.positionElement || self._input;\n }\n function setupMobile() {\n var inputType = self.config.enableTime\n ? self.config.noCalendar\n ? \"time\"\n : \"datetime-local\"\n : \"date\";\n self.mobileInput = createElement(\"input\", self.input.className + \" flatpickr-mobile\");\n self.mobileInput.step = self.input.getAttribute(\"step\") || \"any\";\n self.mobileInput.tabIndex = 1;\n self.mobileInput.type = inputType;\n self.mobileInput.disabled = self.input.disabled;\n self.mobileInput.required = self.input.required;\n self.mobileInput.placeholder = self.input.placeholder;\n self.mobileFormatStr =\n inputType === \"datetime-local\"\n ? \"Y-m-d\\\\TH:i:S\"\n : inputType === \"date\"\n ? \"Y-m-d\"\n : \"H:i:S\";\n if (self.selectedDates.length > 0) {\n self.mobileInput.defaultValue = self.mobileInput.value = self.formatDate(self.selectedDates[0], self.mobileFormatStr);\n }\n if (self.config.minDate)\n self.mobileInput.min = self.formatDate(self.config.minDate, \"Y-m-d\");\n if (self.config.maxDate)\n self.mobileInput.max = self.formatDate(self.config.maxDate, \"Y-m-d\");\n self.input.type = \"hidden\";\n if (self.altInput !== undefined)\n self.altInput.type = \"hidden\";\n try {\n if (self.input.parentNode)\n self.input.parentNode.insertBefore(self.mobileInput, self.input.nextSibling);\n }\n catch (_a) { }\n bind(self.mobileInput, \"change\", function (e) {\n self.setDate(e.target.value, false, self.mobileFormatStr);\n triggerEvent(\"onChange\");\n triggerEvent(\"onClose\");\n });\n }\n function toggle(e) {\n if (self.isOpen === true)\n return self.close();\n self.open(e);\n }\n function triggerEvent(event, data) {\n // If the instance has been destroyed already, all hooks have been removed\n if (self.config === undefined)\n return;\n var hooks = self.config[event];\n if (hooks !== undefined && hooks.length > 0) {\n for (var i = 0; hooks[i] && i < hooks.length; i++)\n hooks[i](self.selectedDates, self.input.value, self, data);\n }\n if (event === \"onChange\") {\n self.input.dispatchEvent(createEvent(\"change\"));\n // many front-end frameworks bind to the input event\n self.input.dispatchEvent(createEvent(\"input\"));\n }\n }\n function createEvent(name) {\n var e = document.createEvent(\"Event\");\n e.initEvent(name, true, true);\n return e;\n }\n function isDateSelected(date) {\n for (var i = 0; i < self.selectedDates.length; i++) {\n if (compareDates(self.selectedDates[i], date) === 0)\n return \"\" + i;\n }\n return false;\n }\n function isDateInRange(date) {\n if (self.config.mode !== \"range\" || self.selectedDates.length < 2)\n return false;\n return (compareDates(date, self.selectedDates[0]) >= 0 &&\n compareDates(date, self.selectedDates[1]) <= 0);\n }\n function updateNavigationCurrentMonth() {\n if (self.config.noCalendar || self.isMobile || !self.monthNav)\n return;\n self.yearElements.forEach(function (yearElement, i) {\n var d = new Date(self.currentYear, self.currentMonth, 1);\n d.setMonth(self.currentMonth + i);\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType === \"static\") {\n self.monthElements[i].textContent =\n monthToStr(d.getMonth(), self.config.shorthandCurrentMonth, self.l10n) + \" \";\n }\n else {\n self.monthsDropdownContainer.value = d.getMonth().toString();\n }\n yearElement.value = d.getFullYear().toString();\n });\n self._hidePrevMonthArrow =\n self.config.minDate !== undefined &&\n (self.currentYear === self.config.minDate.getFullYear()\n ? self.currentMonth <= self.config.minDate.getMonth()\n : self.currentYear < self.config.minDate.getFullYear());\n self._hideNextMonthArrow =\n self.config.maxDate !== undefined &&\n (self.currentYear === self.config.maxDate.getFullYear()\n ? self.currentMonth + 1 > self.config.maxDate.getMonth()\n : self.currentYear > self.config.maxDate.getFullYear());\n }\n function getDateStr(format) {\n return self.selectedDates\n .map(function (dObj) { return self.formatDate(dObj, format); })\n .filter(function (d, i, arr) {\n return self.config.mode !== \"range\" ||\n self.config.enableTime ||\n arr.indexOf(d) === i;\n })\n .join(self.config.mode !== \"range\"\n ? self.config.conjunction\n : self.l10n.rangeSeparator);\n }\n /**\n * Updates the values of inputs associated with the calendar\n */\n function updateValue(triggerChange) {\n if (triggerChange === void 0) { triggerChange = true; }\n if (self.mobileInput !== undefined && self.mobileFormatStr) {\n self.mobileInput.value =\n self.latestSelectedDateObj !== undefined\n ? self.formatDate(self.latestSelectedDateObj, self.mobileFormatStr)\n : \"\";\n }\n self.input.value = getDateStr(self.config.dateFormat);\n if (self.altInput !== undefined) {\n self.altInput.value = getDateStr(self.config.altFormat);\n }\n if (triggerChange !== false)\n triggerEvent(\"onValueUpdate\");\n }\n function onMonthNavClick(e) {\n var isPrevMonth = self.prevMonthNav.contains(e.target);\n var isNextMonth = self.nextMonthNav.contains(e.target);\n if (isPrevMonth || isNextMonth) {\n changeMonth(isPrevMonth ? -1 : 1);\n }\n else if (self.yearElements.indexOf(e.target) >= 0) {\n e.target.select();\n }\n else if (e.target.classList.contains(\"arrowUp\")) {\n self.changeYear(self.currentYear + 1);\n }\n else if (e.target.classList.contains(\"arrowDown\")) {\n self.changeYear(self.currentYear - 1);\n }\n }\n function timeWrapper(e) {\n e.preventDefault();\n var isKeyDown = e.type === \"keydown\", input = e.target;\n if (self.amPM !== undefined && e.target === self.amPM) {\n self.amPM.textContent =\n self.l10n.amPM[int(self.amPM.textContent === self.l10n.amPM[0])];\n }\n var min = parseFloat(input.getAttribute(\"min\")), max = parseFloat(input.getAttribute(\"max\")), step = parseFloat(input.getAttribute(\"step\")), curValue = parseInt(input.value, 10), delta = e.delta ||\n (isKeyDown ? (e.which === 38 ? 1 : -1) : 0);\n var newValue = curValue + step * delta;\n if (typeof input.value !== \"undefined\" && input.value.length === 2) {\n var isHourElem = input === self.hourElement, isMinuteElem = input === self.minuteElement;\n if (newValue < min) {\n newValue =\n max +\n newValue +\n int(!isHourElem) +\n (int(isHourElem) && int(!self.amPM));\n if (isMinuteElem)\n incrementNumInput(undefined, -1, self.hourElement);\n }\n else if (newValue > max) {\n newValue =\n input === self.hourElement ? newValue - max - int(!self.amPM) : min;\n if (isMinuteElem)\n incrementNumInput(undefined, 1, self.hourElement);\n }\n if (self.amPM &&\n isHourElem &&\n (step === 1\n ? newValue + curValue === 23\n : Math.abs(newValue - curValue) > step)) {\n self.amPM.textContent =\n self.l10n.amPM[int(self.amPM.textContent === self.l10n.amPM[0])];\n }\n input.value = pad(newValue);\n }\n }\n init();\n return self;\n }\n /* istanbul ignore next */\n function _flatpickr(nodeList, config) {\n // static list\n var nodes = Array.prototype.slice\n .call(nodeList)\n .filter(function (x) { return x instanceof HTMLElement; });\n var instances = [];\n for (var i = 0; i < nodes.length; i++) {\n var node = nodes[i];\n try {\n if (node.getAttribute(\"data-fp-omit\") !== null)\n continue;\n if (node._flatpickr !== undefined) {\n node._flatpickr.destroy();\n node._flatpickr = undefined;\n }\n node._flatpickr = FlatpickrInstance(node, config || {});\n instances.push(node._flatpickr);\n }\n catch (e) {\n console.error(e);\n }\n }\n return instances.length === 1 ? instances[0] : instances;\n }\n /* istanbul ignore next */\n if (typeof HTMLElement !== \"undefined\" &&\n typeof HTMLCollection !== \"undefined\" &&\n typeof NodeList !== \"undefined\") {\n // browser env\n HTMLCollection.prototype.flatpickr = NodeList.prototype.flatpickr = function (config) {\n return _flatpickr(this, config);\n };\n HTMLElement.prototype.flatpickr = function (config) {\n return _flatpickr([this], config);\n };\n }\n /* istanbul ignore next */\n var flatpickr = function (selector, config) {\n if (typeof selector === \"string\") {\n return _flatpickr(window.document.querySelectorAll(selector), config);\n }\n else if (selector instanceof Node) {\n return _flatpickr([selector], config);\n }\n else {\n return _flatpickr(selector, config);\n }\n };\n /* istanbul ignore next */\n flatpickr.defaultConfig = {};\n flatpickr.l10ns = {\n en: __assign({}, english),\n \"default\": __assign({}, english)\n };\n flatpickr.localize = function (l10n) {\n flatpickr.l10ns[\"default\"] = __assign({}, flatpickr.l10ns[\"default\"], l10n);\n };\n flatpickr.setDefaults = function (config) {\n flatpickr.defaultConfig = __assign({}, flatpickr.defaultConfig, config);\n };\n flatpickr.parseDate = createDateParser({});\n flatpickr.formatDate = createDateFormatter({});\n flatpickr.compareDates = compareDates;\n /* istanbul ignore next */\n if (typeof jQuery !== \"undefined\" && typeof jQuery.fn !== \"undefined\") {\n jQuery.fn.flatpickr = function (config) {\n return _flatpickr(this, config);\n };\n }\n // eslint-disable-next-line @typescript-eslint/camelcase\n Date.prototype.fp_incr = function (days) {\n return new Date(this.getFullYear(), this.getMonth(), this.getDate() + (typeof days === \"string\" ? parseInt(days, 10) : days));\n };\n if (typeof window !== \"undefined\") {\n window.flatpickr = flatpickr;\n }\n\n return flatpickr;\n\n}));\n","(function (global, factory) {\n typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n typeof define === 'function' && define.amd ? define(['exports'], factory) :\n (global = global || self, factory(global.ru = {}));\n}(this, function (exports) { 'use strict';\n\n var fp = typeof window !== \"undefined\" && window.flatpickr !== undefined\n ? window.flatpickr\n : {\n l10ns: {}\n };\n var Russian = {\n weekdays: {\n shorthand: [\"Вс\", \"Пн\", \"Вт\", \"Ср\", \"Чт\", \"Пт\", \"Сб\"],\n longhand: [\n \"Воскресенье\",\n \"Понедельник\",\n \"Вторник\",\n \"Среда\",\n \"Четверг\",\n \"Пятница\",\n \"Суббота\",\n ]\n },\n months: {\n shorthand: [\n \"Янв\",\n \"Фев\",\n \"Март\",\n \"Апр\",\n \"Май\",\n \"Июнь\",\n \"Июль\",\n \"Авг\",\n \"Сен\",\n \"Окт\",\n \"Ноя\",\n \"Дек\",\n ],\n longhand: [\n \"Январь\",\n \"Февраль\",\n \"Март\",\n \"Апрель\",\n \"Май\",\n \"Июнь\",\n \"Июль\",\n \"Август\",\n \"Сентябрь\",\n \"Октябрь\",\n \"Ноябрь\",\n \"Декабрь\",\n ]\n },\n firstDayOfWeek: 1,\n ordinal: function () {\n return \"\";\n },\n rangeSeparator: \" — \",\n weekAbbreviation: \"Нед.\",\n scrollTitle: \"Прокрутите для увеличения\",\n toggleTitle: \"Нажмите для переключения\",\n amPM: [\"ДП\", \"ПП\"],\n yearAriaLabel: \"Год\",\n time_24hr: true\n };\n fp.l10ns.ru = Russian;\n var ru = fp.l10ns;\n\n exports.Russian = Russian;\n exports.default = ru;\n\n Object.defineProperty(exports, '__esModule', { value: true });\n\n}));\n","(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"ClassicEditor\"] = factory();\n\telse\n\t\troot[\"ClassicEditor\"] = factory();\n})(window, function() {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__webpack_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __webpack_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 90);\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/ckeditorerror\n */\n\n/**\n * URL to the documentation with error codes.\n */\nexport const DOCUMENTATION_URL =\n\t'https://ckeditor.com/docs/ckeditor5/latest/framework/guides/support/error-codes.html';\n\n/**\n * The CKEditor error class.\n *\n * You should throw `CKEditorError` when:\n *\n * * An unexpected situation occurred and the editor (most probably) will not work properly. Such exception will be handled\n * by the {@link module:watchdog/watchdog~Watchdog watchdog} (if it is integrated),\n * * If the editor is incorrectly integrated or the editor API is used in the wrong way. This way you will give\n * feedback to the developer as soon as possible. Keep in mind that for common integration issues which should not\n * stop editor initialization (like missing upload adapter, wrong name of a toolbar component) we use `console.warn()` with\n * {@link module:utils/ckeditorerror~attachLinkToDocumentation `attachLinkToDocumentation()`}\n * to improve developers experience and let them see the working editor as soon as possible.\n *\n *\t\t/**\n *\t\t * Error thrown when a plugin cannot be loaded due to JavaScript errors, lack of plugins with a given name, etc.\n *\t\t *\n *\t\t * @error plugin-load\n *\t\t * @param pluginName The name of the plugin that could not be loaded.\n *\t\t * @param moduleName The name of the module which tried to load this plugin.\n *\t\t * /\n *\t\tthrow new CKEditorError( 'plugin-load: It was not possible to load the \"{$pluginName}\" plugin in module \"{$moduleName}', {\n *\t\t\tpluginName: 'foo',\n *\t\t\tmoduleName: 'bar'\n *\t\t} );\n *\n * @extends Error\n */\nexport default class CKEditorError extends Error {\n\t/**\n\t * Creates an instance of the CKEditorError class.\n\t *\n\t * @param {String} message The error message in an `error-name: Error message.` format.\n\t * During the minification process the \"Error message\" part will be removed to limit the code size\n\t * and a link to this error documentation will be added to the `message`.\n\t * @param {Object|null} context A context of the error by which the {@link module:watchdog/watchdog~Watchdog watchdog}\n\t * is able to determine which editor crashed. It should be an editor instance or a property connected to it. It can be also\n\t * a `null` value if the editor should not be restarted in case of the error (e.g. during the editor initialization).\n\t * The error context should be checked using the `areConnectedThroughProperties( editor, context )` utility\n\t * to check if the object works as the context.\n\t * @param {Object} [data] Additional data describing the error. A stringified version of this object\n\t * will be appended to the error message, so the data are quickly visible in the console. The original\n\t * data object will also be later available under the {@link #data} property.\n\t */\n\tconstructor( message, context, data ) {\n\t\tmessage = attachLinkToDocumentation( message );\n\n\t\tif ( data ) {\n\t\t\tmessage += ' ' + JSON.stringify( data );\n\t\t}\n\n\t\tsuper( message );\n\n\t\t/**\n\t\t * @type {String}\n\t\t */\n\t\tthis.name = 'CKEditorError';\n\n\t\t/**\n\t\t * A context of the error by which the Watchdog is able to determine which editor crashed.\n\t\t *\n\t\t * @type {Object|null}\n\t\t */\n\t\tthis.context = context;\n\n\t\t/**\n\t\t * The additional error data passed to the constructor. Undefined if none was passed.\n\t\t *\n\t\t * @type {Object|undefined}\n\t\t */\n\t\tthis.data = data;\n\t}\n\n\t/**\n\t * Checks if the error is of the `CKEditorError` type.\n\t */\n\tis( type ) {\n\t\treturn type === 'CKEditorError';\n\t}\n\n\t/**\n\t * A utility that ensures the the thrown error is a {@link module:utils/ckeditorerror~CKEditorError} one.\n\t * It is useful when combined with the {@link module:watchdog/watchdog~Watchdog} feature, which can restart the editor in case\n\t * of a {@link module:utils/ckeditorerror~CKEditorError} error.\n\t *\n\t * @param {Error} err An error.\n\t * @param {Object} context An object connected through properties with the editor instance. This context will be used\n\t * by the watchdog to verify which editor should be restarted.\n\t */\n\tstatic rethrowUnexpectedError( err, context ) {\n\t\tif ( err.is && err.is( 'CKEditorError' ) ) {\n\t\t\tthrow err;\n\t\t}\n\n\t\t/**\n\t\t * An unexpected error occurred inside the CKEditor 5 codebase. This error will look like the original one\n\t\t * to make the debugging easier.\n\t\t *\n\t\t * This error is only useful when the editor is initialized using the {@link module:watchdog/watchdog~Watchdog} feature.\n\t\t * In case of such error (or any {@link module:utils/ckeditorerror~CKEditorError} error) the watchdog should restart the editor.\n\t\t *\n\t\t * @error unexpected-error\n\t\t */\n\t\tconst error = new CKEditorError( err.message, context );\n\n\t\t// Restore the original stack trace to make the error look like the original one.\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/5595 for more details.\n\t\terror.stack = err.stack;\n\n\t\tthrow error;\n\t}\n}\n\n/**\n * Attaches the link to the documentation at the end of the error message. Use whenever you log a warning or error on the\n * console. It is also used by {@link module:utils/ckeditorerror~CKEditorError}.\n *\n *\t\t /**\n *\t\t * There was a problem processing the configuration of the toolbar. The item with the given\n *\t\t * name does not exist so it was omitted when rendering the toolbar.\n *\t\t *\n *\t\t * @error toolbarview-item-unavailable\n *\t\t * @param {String} name The name of the component.\n *\t\t * /\n *\t\t console.warn( attachLinkToDocumentation(\n *\t\t \t'toolbarview-item-unavailable: The requested toolbar item is unavailable.' ), { name } );\n *\n * @param {String} message Message to be logged.\n * @returns {String}\n */\nexport function attachLinkToDocumentation( message ) {\n\tconst matchedErrorName = message.match( /^([^:]+):/ );\n\n\tif ( !matchedErrorName ) {\n\t\treturn message;\n\t}\n\n\treturn message + ` Read more: ${ DOCUMENTATION_URL }#error-${ matchedErrorName[ 1 ] }\\n`;\n}\n","\"use strict\";\n\nvar stylesInDom = {};\n\nvar isOldIE = function isOldIE() {\n var memo;\n return function memorize() {\n if (typeof memo === 'undefined') {\n // Test for IE <= 9 as proposed by Browserhacks\n // @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805\n // Tests for existence of standard globals is to allow style-loader\n // to operate correctly into non-standard environments\n // @see https://github.com/webpack-contrib/style-loader/issues/177\n memo = Boolean(window && document && document.all && !window.atob);\n }\n\n return memo;\n };\n}();\n\nvar getTarget = function getTarget() {\n var memo = {};\n return function memorize(target) {\n if (typeof memo[target] === 'undefined') {\n var styleTarget = document.querySelector(target); // Special case to return head of iframe instead of iframe itself\n\n if (window.HTMLIFrameElement && styleTarget instanceof window.HTMLIFrameElement) {\n try {\n // This will throw an exception if access to iframe is blocked\n // due to cross-origin restrictions\n styleTarget = styleTarget.contentDocument.head;\n } catch (e) {\n // istanbul ignore next\n styleTarget = null;\n }\n }\n\n memo[target] = styleTarget;\n }\n\n return memo[target];\n };\n}();\n\nfunction listToStyles(list, options) {\n var styles = [];\n var newStyles = {};\n\n for (var i = 0; i < list.length; i++) {\n var item = list[i];\n var id = options.base ? item[0] + options.base : item[0];\n var css = item[1];\n var media = item[2];\n var sourceMap = item[3];\n var part = {\n css: css,\n media: media,\n sourceMap: sourceMap\n };\n\n if (!newStyles[id]) {\n styles.push(newStyles[id] = {\n id: id,\n parts: [part]\n });\n } else {\n newStyles[id].parts.push(part);\n }\n }\n\n return styles;\n}\n\nfunction addStylesToDom(styles, options) {\n for (var i = 0; i < styles.length; i++) {\n var item = styles[i];\n var domStyle = stylesInDom[item.id];\n var j = 0;\n\n if (domStyle) {\n domStyle.refs++;\n\n for (; j < domStyle.parts.length; j++) {\n domStyle.parts[j](item.parts[j]);\n }\n\n for (; j < item.parts.length; j++) {\n domStyle.parts.push(addStyle(item.parts[j], options));\n }\n } else {\n var parts = [];\n\n for (; j < item.parts.length; j++) {\n parts.push(addStyle(item.parts[j], options));\n }\n\n stylesInDom[item.id] = {\n id: item.id,\n refs: 1,\n parts: parts\n };\n }\n }\n}\n\nfunction insertStyleElement(options) {\n var style = document.createElement('style');\n\n if (typeof options.attributes.nonce === 'undefined') {\n var nonce = typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;\n\n if (nonce) {\n options.attributes.nonce = nonce;\n }\n }\n\n Object.keys(options.attributes).forEach(function (key) {\n style.setAttribute(key, options.attributes[key]);\n });\n\n if (typeof options.insert === 'function') {\n options.insert(style);\n } else {\n var target = getTarget(options.insert || 'head');\n\n if (!target) {\n throw new Error(\"Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid.\");\n }\n\n target.appendChild(style);\n }\n\n return style;\n}\n\nfunction removeStyleElement(style) {\n // istanbul ignore if\n if (style.parentNode === null) {\n return false;\n }\n\n style.parentNode.removeChild(style);\n}\n/* istanbul ignore next */\n\n\nvar replaceText = function replaceText() {\n var textStore = [];\n return function replace(index, replacement) {\n textStore[index] = replacement;\n return textStore.filter(Boolean).join('\\n');\n };\n}();\n\nfunction applyToSingletonTag(style, index, remove, obj) {\n var css = remove ? '' : obj.css; // For old IE\n\n /* istanbul ignore if */\n\n if (style.styleSheet) {\n style.styleSheet.cssText = replaceText(index, css);\n } else {\n var cssNode = document.createTextNode(css);\n var childNodes = style.childNodes;\n\n if (childNodes[index]) {\n style.removeChild(childNodes[index]);\n }\n\n if (childNodes.length) {\n style.insertBefore(cssNode, childNodes[index]);\n } else {\n style.appendChild(cssNode);\n }\n }\n}\n\nfunction applyToTag(style, options, obj) {\n var css = obj.css;\n var media = obj.media;\n var sourceMap = obj.sourceMap;\n\n if (media) {\n style.setAttribute('media', media);\n }\n\n if (sourceMap && btoa) {\n css += \"\\n/*# sourceMappingURL=data:application/json;base64,\".concat(btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))), \" */\");\n } // For old IE\n\n /* istanbul ignore if */\n\n\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n while (style.firstChild) {\n style.removeChild(style.firstChild);\n }\n\n style.appendChild(document.createTextNode(css));\n }\n}\n\nvar singleton = null;\nvar singletonCounter = 0;\n\nfunction addStyle(obj, options) {\n var style;\n var update;\n var remove;\n\n if (options.singleton) {\n var styleIndex = singletonCounter++;\n style = singleton || (singleton = insertStyleElement(options));\n update = applyToSingletonTag.bind(null, style, styleIndex, false);\n remove = applyToSingletonTag.bind(null, style, styleIndex, true);\n } else {\n style = insertStyleElement(options);\n update = applyToTag.bind(null, style, options);\n\n remove = function remove() {\n removeStyleElement(style);\n };\n }\n\n update(obj);\n return function updateStyle(newObj) {\n if (newObj) {\n if (newObj.css === obj.css && newObj.media === obj.media && newObj.sourceMap === obj.sourceMap) {\n return;\n }\n\n update(obj = newObj);\n } else {\n remove();\n }\n };\n}\n\nmodule.exports = function (list, options) {\n options = options || {};\n options.attributes = typeof options.attributes === 'object' ? options.attributes : {}; // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>\n // tags it will allow on a page\n\n if (!options.singleton && typeof options.singleton !== 'boolean') {\n options.singleton = isOldIE();\n }\n\n var styles = listToStyles(list, options);\n addStylesToDom(styles, options);\n return function update(newList) {\n var mayRemove = [];\n\n for (var i = 0; i < styles.length; i++) {\n var item = styles[i];\n var domStyle = stylesInDom[item.id];\n\n if (domStyle) {\n domStyle.refs--;\n mayRemove.push(domStyle);\n }\n }\n\n if (newList) {\n var newStyles = listToStyles(newList, options);\n addStylesToDom(newStyles, options);\n }\n\n for (var _i = 0; _i < mayRemove.length; _i++) {\n var _domStyle = mayRemove[_i];\n\n if (_domStyle.refs === 0) {\n for (var j = 0; j < _domStyle.parts.length; j++) {\n _domStyle.parts[j]();\n }\n\n delete stylesInDom[_domStyle.id];\n }\n }\n };\n};","import freeGlobal from './_freeGlobal.js';\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\nexport default root;\n","import freeGlobal from './_freeGlobal.js';\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Detect free variable `process` from Node.js. */\nvar freeProcess = moduleExports && freeGlobal.process;\n\n/** Used to access faster Node.js helpers. */\nvar nodeUtil = (function() {\n try {\n // Use `util.types` for Node.js 10+.\n var types = freeModule && freeModule.require && freeModule.require('util').types;\n\n if (types) {\n return types;\n }\n\n // Legacy `process.binding('util')` for Node.js < 10.\n return freeProcess && freeProcess.binding && freeProcess.binding('util');\n } catch (e) {}\n}());\n\nexport default nodeUtil;\n","import root from './_root.js';\nimport stubFalse from './stubFalse.js';\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;\n\n/**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\nvar isBuffer = nativeIsBuffer || stubFalse;\n\nexport default isBuffer;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/version\n */\n\n/* globals window, global */\n\nimport CKEditorError from './ckeditorerror';\n\nconst version = '16.0.0';\n\n/* istanbul ignore next */\nconst windowOrGlobal = typeof window === 'object' ? window : global;\n\n/* istanbul ignore next */\nif ( windowOrGlobal.CKEDITOR_VERSION ) {\n\t/**\n\t * This error is thrown when due to a mistake in how CKEditor 5 was installed or initialized, some\n\t * of its modules were duplicated (evaluated and executed twice). Module duplication leads to inevitable runtime\n\t * errors.\n\t *\n\t * There are many situations in which some modules can be loaded twice. In the worst case scenario,\n\t * you may need to check your project for each of these issues and fix them all.\n\t *\n\t * # Trying to add a plugin to an existing build\n\t *\n\t * If you import an existing CKEditor 5 build and a plugin like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-build-classic';\n\t *\t\timport Highlight from '@ckeditor/ckeditor5-highlight/src/highlight';\n\t *\n\t * Then your project loads some CKEditor 5 packages twice. How does it happen?\n\t *\n\t * The build package contains a file which is already compiled with webpack. This means\n\t * that it contains all the necessary code from e.g. `@ckeditor/ckeditor5-engine` and `@ckeditor/ckeditor5-utils`.\n\t *\n\t * However, the `Highlight` plugin imports some of the modules from these packages, too. If you ask webpack to\n\t * build such a project, you will end up with the modules being included (and run) twice — first, because they are\n\t * included inside the build package, and second, because they are required by the `Highlight` plugin.\n\t *\n\t * Therefore, **you must never add plugins to an existing build** unless your plugin has no dependencies.\n\t *\n\t * Adding plugins to a build is done by taking the source version of this build (so, before it was built with webpack)\n\t * and adding plugins there. In this situation, webpack will know that it only needs to load each plugin once.\n\t *\n\t * Read more in the {@glink builds/guides/integration/installing-plugins \"Installing plugins\"} guide.\n\t *\n\t * # Confused an editor build with an editor implementation\n\t *\n\t * This scenario is very similar to the previous one, but has a different origin.\n\t *\n\t * Let's assume that you wanted to use CKEditor 5 from source, as explained in the\n\t * {@glink builds/guides/integration/advanced-setup#scenario-2-building-from-source \"Building from source\"} section\n\t * or in the {@glink framework/guides/quick-start \"Quick start\"} guide of CKEditor 5 Framework.\n\t *\n\t * The correct way to do so is to import an editor and plugins and run them together like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';\n\t *\t\timport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\n\t *\t\timport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\t *\t\timport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\n\t *\t\timport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ), {\n\t *\t\t\t\tplugins: [ Essentials, Paragraph, Bold, Italic ],\n\t *\t\t\t\ttoolbar: [ 'bold', 'italic' ]\n\t *\t\t\t} )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( error => {\n\t *\t\t\t\tconsole.error( error.stack );\n\t *\t\t\t} );\n\t *\n\t * However, you might have mistakenly imported a build instead of the source `ClassicEditor`. In this case\n\t * your imports will look like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-build-classic';\n\t *\t\timport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\n\t *\t\timport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\t *\t\timport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\n\t *\t\timport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\n\t *\n\t * This creates the same situation as in the previous section because you use a build together with source plugins.\n\t *\n\t * Remember: `@ckeditor/ckeditor5-build-*` packages contain editor builds and `@ckeditor/ckeditor5-editor-*` contain source editors.\n\t *\n\t * # Loading two or more builds on one page\n\t *\n\t * If you use CKEditor 5 builds, you might have loaded two (or more) `ckeditor.js` files on one web page.\n\t * Check your web page for duplicated `<script>` elements or make sure your page builder/bundler includes CKEditor only once.\n\t *\n\t * If you want to use two different types of editors at once, see the\n\t * {@glink builds/guides/integration/advanced-setup#scenario-3-using-two-different-editors \"Using two different editors\"}\n\t * section.\n\t *\n\t * # Using outdated packages\n\t *\n\t * Building CKEditor 5 from source requires using multiple npm packages. These packages have their dependencies\n\t * to other packages. If you use the latest version of, for example, `@ckeditor/ckeditor5-editor-classic` with\n\t * an outdated version of `@ckeditor/ckeditor5-image`, npm or yarn will need to install two different versions of\n\t * `@ckeditor/ckeditor5-core` because `@ckeditor/ckeditor5-editor-classic` and `@ckeditor/ckeditor5-image` may require\n\t * different versions of the core package.\n\t *\n\t * The solution to this issue is to update all packages to their latest version. We recommend\n\t * using tools like [`node-check-updates`](https://www.npmjs.com/package/npm-check-updates) which simplify this process.\n\t *\n\t * # Conflicting version of dependencies\n\t *\n\t * This is a special case of the previous scenario. If you use CKEditor 5 with some third-party plugins,\n\t * it may happen that even if you use the latest versions of the official packages and the latest version of\n\t * these third-party packages, there will be a conflict between some of their dependencies.\n\t *\n\t * Such a problem can be resolved by either downgrading CKEditor 5 packages (which we do not recommend) or\n\t * asking the author of the third-party package to upgrade its depdendencies (or forking their project and doing this yourself).\n\t *\n\t * # Packages were duplicated in `node_modules`\n\t *\n\t * In some situations, especially when calling `npm install` multiple times, it may happen\n\t * that npm will not correctly \"deduplicate\" packages.\n\t *\n\t * Normally, npm deduplicates all packages so, for example, `@ckeditor/ckeditor5-core` is installed only once in `node_modules/`.\n\t * However, it is known to fail to do so from time to time.\n\t *\n\t * We recommend checking if any of the steps listed below help:\n\t *\n\t * * `rm -rf node_modules && npm install` to make sure you have a clean `node_modules/` directory. This step\n\t * is known to help in most cases.\n\t * * If you use `yarn.lock` or `package-lock.json`, remove it before `npm install`.\n\t * * Check whether all CKEditor 5 packages are up to date and reinstall them\n\t * if you changed anything (`rm -rf node_modules && npm install`).\n\t *\n\t * If all packages are correct and compatible with each other, the steps above are known to help. If not, you may\n\t * try to check with `npm ls` how many times packages like `@ckeditor/ckeditor5-core`, `@ckeditor/ckeditor5-engine` and\n\t *`@ckeditor/ckeditor5-utils` are installed. If more than once, verify which package causes that.\n\t *\n\t * @error ckeditor-duplicated-modules\n\t */\n\tthrow new CKEditorError(\n\t\t'ckeditor-duplicated-modules: Some CKEditor 5 modules are duplicated.',\n\t\tnull\n\t);\n} else {\n\twindowOrGlobal.CKEDITOR_VERSION = version;\n}\n","/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\nexport default freeGlobal;\n","module.exports = function(originalModule) {\n\tif (!originalModule.webpackPolyfill) {\n\t\tvar module = Object.create(originalModule);\n\t\t// module.parent = undefined by default\n\t\tif (!module.children) module.children = [];\n\t\tObject.defineProperty(module, \"loaded\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.l;\n\t\t\t}\n\t\t});\n\t\tObject.defineProperty(module, \"id\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.i;\n\t\t\t}\n\t\t});\n\t\tObject.defineProperty(module, \"exports\", {\n\t\t\tenumerable: true\n\t\t});\n\t\tmodule.webpackPolyfill = 1;\n\t}\n\treturn module;\n};\n","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./heading.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","/**\n * This method returns `false`.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {boolean} Returns `false`.\n * @example\n *\n * _.times(2, _.stubFalse);\n * // => [false, false]\n */\nfunction stubFalse() {\n return false;\n}\n\nexport default stubFalse;\n","import root from './_root.js';\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined,\n allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;\n\n/**\n * Creates a clone of `buffer`.\n *\n * @private\n * @param {Buffer} buffer The buffer to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Buffer} Returns the cloned buffer.\n */\nfunction cloneBuffer(buffer, isDeep) {\n if (isDeep) {\n return buffer.slice();\n }\n var length = buffer.length,\n result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);\n\n buffer.copy(result);\n return result;\n}\n\nexport default cloneBuffer;\n","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./placeholder.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-placeholder:before,.ck .ck-placeholder:before{content:attr(data-placeholder);pointer-events:none}.ck.ck-read-only .ck-placeholder:before{display:none}.ck.ck-placeholder:before,.ck .ck-placeholder:before{cursor:text;color:var(--ck-color-engine-placeholder-text)}\"","var content = require(\"!!../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./globals.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-hidden{display:none!important}.ck.ck-reset,.ck.ck-reset_all,.ck.ck-reset_all *{box-sizing:border-box;width:auto;height:auto;position:static}:root{--ck-z-default:1;--ck-z-modal:calc(var(--ck-z-default) + 999);--ck-color-base-foreground:#fafafa;--ck-color-base-background:#fff;--ck-color-base-border:#c4c4c4;--ck-color-base-action:#61b045;--ck-color-base-focus:#6cb5f9;--ck-color-base-text:#333;--ck-color-base-active:#198cf0;--ck-color-base-active-focus:#0e7fe1;--ck-color-base-error:#db3700;--ck-color-focus-border:#1f89e5;--ck-color-focus-outer-shadow:#bcdefb;--ck-color-focus-disabled-shadow:rgba(119,186,248,0.3);--ck-color-focus-error-shadow:rgba(255,64,31,0.3);--ck-color-text:var(--ck-color-base-text);--ck-color-shadow-drop:rgba(0,0,0,0.15);--ck-color-shadow-drop-active:rgba(0,0,0,0.2);--ck-color-shadow-inner:rgba(0,0,0,0.1);--ck-color-button-default-background:transparent;--ck-color-button-default-hover-background:#e6e6e6;--ck-color-button-default-active-background:#d9d9d9;--ck-color-button-default-active-shadow:#bfbfbf;--ck-color-button-default-disabled-background:transparent;--ck-color-button-on-background:#dedede;--ck-color-button-on-hover-background:#c4c4c4;--ck-color-button-on-active-background:#bababa;--ck-color-button-on-active-shadow:#a1a1a1;--ck-color-button-on-disabled-background:#dedede;--ck-color-button-action-background:var(--ck-color-base-action);--ck-color-button-action-hover-background:#579e3d;--ck-color-button-action-active-background:#53973b;--ck-color-button-action-active-shadow:#498433;--ck-color-button-action-disabled-background:#7ec365;--ck-color-button-action-text:var(--ck-color-base-background);--ck-color-button-save:#008a00;--ck-color-button-cancel:#db3700;--ck-color-switch-button-off-background:#b0b0b0;--ck-color-switch-button-off-hover-background:#a3a3a3;--ck-color-switch-button-on-background:var(--ck-color-button-action-background);--ck-color-switch-button-on-hover-background:#579e3d;--ck-color-switch-button-inner-background:var(--ck-color-base-background);--ck-color-switch-button-inner-shadow:rgba(0,0,0,0.1);--ck-color-dropdown-panel-background:var(--ck-color-base-background);--ck-color-dropdown-panel-border:var(--ck-color-base-border);--ck-color-input-background:var(--ck-color-base-background);--ck-color-input-border:#c7c7c7;--ck-color-input-error-border:var(--ck-color-base-error);--ck-color-input-text:var(--ck-color-base-text);--ck-color-input-disabled-background:#f2f2f2;--ck-color-input-disabled-border:#c7c7c7;--ck-color-input-disabled-text:#5c5c5c;--ck-color-list-background:var(--ck-color-base-background);--ck-color-list-button-hover-background:var(--ck-color-button-default-hover-background);--ck-color-list-button-on-background:var(--ck-color-base-active);--ck-color-list-button-on-background-focus:var(--ck-color-base-active-focus);--ck-color-list-button-on-text:var(--ck-color-base-background);--ck-color-panel-background:var(--ck-color-base-background);--ck-color-panel-border:var(--ck-color-base-border);--ck-color-toolbar-background:var(--ck-color-base-foreground);--ck-color-toolbar-border:var(--ck-color-base-border);--ck-color-tooltip-background:var(--ck-color-base-text);--ck-color-tooltip-text:var(--ck-color-base-background);--ck-color-engine-placeholder-text:#707070;--ck-color-upload-bar-background:#6cb5f9;--ck-color-link-default:#0000f0;--ck-color-link-selected-background:rgba(31,177,255,0.1);--ck-disabled-opacity:.5;--ck-focus-outer-shadow-geometry:0 0 0 3px;--ck-focus-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-outer-shadow);--ck-focus-disabled-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-disabled-shadow);--ck-focus-error-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-error-shadow);--ck-focus-ring:1px solid var(--ck-color-focus-border);--ck-font-size-base:13px;--ck-line-height-base:1.84615;--ck-font-face:Helvetica,Arial,Tahoma,Verdana,Sans-Serif;--ck-font-size-tiny:0.7em;--ck-font-size-small:0.75em;--ck-font-size-normal:1em;--ck-font-size-big:1.4em;--ck-font-size-large:1.8em;--ck-ui-component-min-height:2.3em}.ck.ck-reset,.ck.ck-reset_all,.ck.ck-reset_all *{margin:0;padding:0;border:0;background:transparent;text-decoration:none;vertical-align:middle;transition:none;word-wrap:break-word}.ck.ck-reset_all,.ck.ck-reset_all *{border-collapse:collapse;font:normal normal normal var(--ck-font-size-base)/var(--ck-line-height-base) var(--ck-font-face);color:var(--ck-color-text);text-align:left;white-space:nowrap;cursor:auto;float:none}.ck.ck-reset_all .ck-rtl *{text-align:right}.ck.ck-reset_all iframe{vertical-align:inherit}.ck.ck-reset_all textarea{white-space:pre-wrap}.ck.ck-reset_all input[type=password],.ck.ck-reset_all input[type=text],.ck.ck-reset_all textarea{cursor:text}.ck.ck-reset_all input[type=password][disabled],.ck.ck-reset_all input[type=text][disabled],.ck.ck-reset_all textarea[disabled]{cursor:default}.ck.ck-reset_all fieldset{padding:10px;border:2px groove #dfdee3}.ck.ck-reset_all button::-moz-focus-inner{padding:0;border:0}.ck[dir=rtl],.ck[dir=rtl] .ck{text-align:right}:root{--ck-border-radius:2px;--ck-inner-shadow:2px 2px 3px var(--ck-color-shadow-inner) inset;--ck-drop-shadow:0 1px 2px 1px var(--ck-color-shadow-drop);--ck-drop-shadow-active:0 3px 6px 1px var(--ck-color-shadow-drop-active);--ck-spacing-unit:0.6em;--ck-spacing-large:calc(var(--ck-spacing-unit)*1.5);--ck-spacing-standard:var(--ck-spacing-unit);--ck-spacing-medium:calc(var(--ck-spacing-unit)*0.8);--ck-spacing-small:calc(var(--ck-spacing-unit)*0.5);--ck-spacing-tiny:calc(var(--ck-spacing-unit)*0.3);--ck-spacing-extra-tiny:calc(var(--ck-spacing-unit)*0.16)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./editorui.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor__editable:not(.ck-editor__nested-editable){border-radius:0}.ck-rounded-corners .ck.ck-editor__editable:not(.ck-editor__nested-editable),.ck.ck-editor__editable:not(.ck-editor__nested-editable).ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-editor__editable:not(.ck-editor__nested-editable).ck-focused{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-inner-shadow),0 0}.ck.ck-editor__editable_inline{overflow:auto;padding:0 var(--ck-spacing-standard);border:1px solid transparent}.ck.ck-editor__editable_inline[dir=ltr]{text-align:left}.ck.ck-editor__editable_inline[dir=rtl]{text-align:right}.ck.ck-editor__editable_inline>:first-child{margin-top:var(--ck-spacing-large)}.ck.ck-editor__editable_inline>:last-child{margin-bottom:var(--ck-spacing-large)}.ck.ck-balloon-panel.ck-toolbar-container[class*=arrow_n]:after{border-bottom-color:var(--ck-color-base-foreground)}.ck.ck-balloon-panel.ck-toolbar-container[class*=arrow_s]:after{border-top-color:var(--ck-color-base-foreground)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./label.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-label{display:block}.ck.ck-voice-label{display:none}.ck.ck-label{font-weight:700}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./stickypanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-sticky-panel .ck-sticky-panel__content_sticky{z-index:var(--ck-z-modal);position:fixed;top:0}.ck.ck-sticky-panel .ck-sticky-panel__content_sticky_bottom-limit{top:auto;position:absolute}.ck.ck-sticky-panel .ck-sticky-panel__content_sticky{box-shadow:var(--ck-drop-shadow),0 0;border-width:0 1px 1px;border-top-left-radius:0;border-top-right-radius:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./dropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-dropdown{display:inline-block;position:relative}.ck.ck-dropdown .ck-dropdown__arrow{pointer-events:none;z-index:var(--ck-z-default)}.ck.ck-dropdown .ck-button.ck-dropdown__button{width:100%}.ck.ck-dropdown .ck-button.ck-dropdown__button.ck-on .ck-tooltip{display:none}.ck.ck-dropdown .ck-dropdown__panel{-webkit-backface-visibility:hidden;display:none;z-index:var(--ck-z-modal);position:absolute}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel-visible{display:inline-block}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_ne,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_nw{bottom:100%}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_se,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_sw{top:100%;bottom:auto}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_ne,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_se{left:0}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_nw,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_sw{right:0}:root{--ck-dropdown-arrow-size:calc(0.5*var(--ck-icon-size))}.ck.ck-dropdown{font-size:inherit}.ck.ck-dropdown .ck-dropdown__arrow{width:var(--ck-dropdown-arrow-size)}[dir=ltr] .ck.ck-dropdown .ck-dropdown__arrow{right:var(--ck-spacing-standard);margin-left:var(--ck-spacing-small)}[dir=rtl] .ck.ck-dropdown .ck-dropdown__arrow{left:var(--ck-spacing-standard);margin-right:var(--ck-spacing-small)}.ck.ck-dropdown.ck-disabled .ck-dropdown__arrow{opacity:var(--ck-disabled-opacity)}[dir=ltr] .ck.ck-dropdown .ck-button.ck-dropdown__button:not(.ck-button_with-text){padding-left:var(--ck-spacing-small)}[dir=rtl] .ck.ck-dropdown .ck-button.ck-dropdown__button:not(.ck-button_with-text){padding-right:var(--ck-spacing-small)}.ck.ck-dropdown .ck-button.ck-dropdown__button .ck-button__label{width:7em;overflow:hidden;text-overflow:ellipsis}.ck.ck-dropdown .ck-button.ck-dropdown__button.ck-disabled .ck-button__label{opacity:var(--ck-disabled-opacity)}.ck.ck-dropdown .ck-button.ck-dropdown__button.ck-on{border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-dropdown__panel{box-shadow:var(--ck-drop-shadow),0 0;border-radius:0}.ck-rounded-corners .ck.ck-dropdown__panel,.ck.ck-dropdown__panel.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0}.ck.ck-dropdown__panel{background:var(--ck-color-dropdown-panel-background);border:1px solid var(--ck-color-dropdown-panel-border);bottom:0;min-width:100%}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./icon.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-icon{vertical-align:middle}:root{--ck-icon-size:calc(var(--ck-line-height-base)*var(--ck-font-size-normal))}.ck.ck-icon{width:var(--ck-icon-size);height:var(--ck-icon-size);font-size:.8333350694em;will-change:transform}.ck.ck-icon,.ck.ck-icon *{color:inherit;cursor:inherit}.ck.ck-icon :not([fill]){fill:currentColor}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./tooltip.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-tooltip,.ck.ck-tooltip .ck-tooltip__text:after{position:absolute;pointer-events:none;-webkit-backface-visibility:hidden}.ck.ck-tooltip{visibility:hidden;opacity:0;display:none;z-index:var(--ck-z-modal)}.ck.ck-tooltip .ck-tooltip__text{display:inline-block}.ck.ck-tooltip .ck-tooltip__text:after{content:\\\"\\\";width:0;height:0}:root{--ck-tooltip-arrow-size:5px}.ck.ck-tooltip{left:50%;top:0;transition:opacity .2s ease-in-out .2s}.ck.ck-tooltip .ck-tooltip__text{border-radius:0}.ck-rounded-corners .ck.ck-tooltip .ck-tooltip__text,.ck.ck-tooltip .ck-tooltip__text.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-tooltip .ck-tooltip__text{font-size:.9em;line-height:1.5;color:var(--ck-color-tooltip-text);padding:var(--ck-spacing-small) var(--ck-spacing-medium);background:var(--ck-color-tooltip-background);position:relative;left:-50%}.ck.ck-tooltip .ck-tooltip__text:after{transition:opacity .2s ease-in-out .2s;border-style:solid;left:50%}.ck.ck-tooltip.ck-tooltip_s{bottom:calc(-1*var(--ck-tooltip-arrow-size));transform:translateY(100%)}.ck.ck-tooltip.ck-tooltip_s .ck-tooltip__text:after{top:calc(-1*var(--ck-tooltip-arrow-size));transform:translateX(-50%);border-left-color:transparent;border-bottom-color:var(--ck-color-tooltip-background);border-right-color:transparent;border-top-color:transparent;border-left-width:var(--ck-tooltip-arrow-size);border-bottom-width:var(--ck-tooltip-arrow-size);border-right-width:var(--ck-tooltip-arrow-size);border-top-width:0}.ck.ck-tooltip.ck-tooltip_n{top:calc(-1*var(--ck-tooltip-arrow-size));transform:translateY(-100%)}.ck.ck-tooltip.ck-tooltip_n .ck-tooltip__text:after{bottom:calc(-1*var(--ck-tooltip-arrow-size));transform:translateX(-50%);border-left-color:transparent;border-bottom-color:transparent;border-right-color:transparent;border-top-color:var(--ck-color-tooltip-background);border-left-width:var(--ck-tooltip-arrow-size);border-bottom-width:0;border-right-width:var(--ck-tooltip-arrow-size);border-top-width:var(--ck-tooltip-arrow-size)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./button.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-button,a.ck.ck-button{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none}.ck.ck-button .ck-tooltip,a.ck.ck-button .ck-tooltip{display:block}@media (hover:none){.ck.ck-button .ck-tooltip,a.ck.ck-button .ck-tooltip{display:none}}.ck.ck-button,a.ck.ck-button{position:relative;display:inline-flex;align-items:center;justify-content:left}.ck.ck-button .ck-button__label,a.ck.ck-button .ck-button__label{display:none}.ck.ck-button.ck-button_with-text .ck-button__label,a.ck.ck-button.ck-button_with-text .ck-button__label{display:inline-block}.ck.ck-button:not(.ck-button_with-text),a.ck.ck-button:not(.ck-button_with-text){justify-content:center}.ck.ck-button:hover .ck-tooltip,a.ck.ck-button:hover .ck-tooltip{visibility:visible;opacity:1}.ck.ck-button:focus:not(:hover) .ck-tooltip,a.ck.ck-button:focus:not(:hover) .ck-tooltip{display:none}.ck.ck-button,a.ck.ck-button{background:var(--ck-color-button-default-background)}.ck.ck-button:not(.ck-disabled):hover,a.ck.ck-button:not(.ck-disabled):hover{background:var(--ck-color-button-default-hover-background)}.ck.ck-button:not(.ck-disabled):active,a.ck.ck-button:not(.ck-disabled):active{background:var(--ck-color-button-default-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-default-active-shadow)}.ck.ck-button.ck-disabled,a.ck.ck-button.ck-disabled{background:var(--ck-color-button-default-disabled-background)}.ck.ck-button,a.ck.ck-button{border-radius:0}.ck-rounded-corners .ck.ck-button,.ck-rounded-corners a.ck.ck-button,.ck.ck-button.ck-rounded-corners,a.ck.ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-button,a.ck.ck-button{white-space:nowrap;cursor:default;vertical-align:middle;padding:var(--ck-spacing-tiny);text-align:center;min-width:var(--ck-ui-component-min-height);min-height:var(--ck-ui-component-min-height);line-height:1;font-size:inherit;border:1px solid transparent;transition:box-shadow .2s ease-in-out,border .2s ease-in-out;-webkit-appearance:none}.ck.ck-button:active,.ck.ck-button:focus,a.ck.ck-button:active,a.ck.ck-button:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-focus-outer-shadow),0 0}.ck.ck-button .ck-button__icon use,.ck.ck-button .ck-button__icon use *,a.ck.ck-button .ck-button__icon use,a.ck.ck-button .ck-button__icon use *{color:inherit}.ck.ck-button .ck-button__label,a.ck.ck-button .ck-button__label{font-size:inherit;font-weight:inherit;color:inherit;cursor:inherit;vertical-align:middle}[dir=ltr] .ck.ck-button .ck-button__label,[dir=ltr] a.ck.ck-button .ck-button__label{text-align:left}[dir=rtl] .ck.ck-button .ck-button__label,[dir=rtl] a.ck.ck-button .ck-button__label{text-align:right}.ck.ck-button .ck-button__keystroke,a.ck.ck-button .ck-button__keystroke{color:inherit}[dir=ltr] .ck.ck-button .ck-button__keystroke,[dir=ltr] a.ck.ck-button .ck-button__keystroke{margin-left:var(--ck-spacing-large)}[dir=rtl] .ck.ck-button .ck-button__keystroke,[dir=rtl] a.ck.ck-button .ck-button__keystroke{margin-right:var(--ck-spacing-large)}.ck.ck-button .ck-button__keystroke,a.ck.ck-button .ck-button__keystroke{font-weight:700;opacity:.7}.ck.ck-button.ck-disabled:active,.ck.ck-button.ck-disabled:focus,a.ck.ck-button.ck-disabled:active,a.ck.ck-button.ck-disabled:focus{box-shadow:var(--ck-focus-disabled-outer-shadow),0 0}.ck.ck-button.ck-disabled .ck-button__icon,a.ck.ck-button.ck-disabled .ck-button__icon{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-disabled .ck-button__label,a.ck.ck-button.ck-disabled .ck-button__label{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-disabled .ck-button__keystroke,a.ck.ck-button.ck-disabled .ck-button__keystroke{opacity:.3}.ck.ck-button.ck-button_with-text,a.ck.ck-button.ck-button_with-text{padding:var(--ck-spacing-tiny) var(--ck-spacing-standard)}[dir=ltr] .ck.ck-button.ck-button_with-text .ck-button__icon,[dir=ltr] a.ck.ck-button.ck-button_with-text .ck-button__icon{margin-left:calc(-1*var(--ck-spacing-small));margin-right:var(--ck-spacing-small)}[dir=rtl] .ck.ck-button.ck-button_with-text .ck-button__icon,[dir=rtl] a.ck.ck-button.ck-button_with-text .ck-button__icon{margin-right:calc(-1*var(--ck-spacing-small));margin-left:var(--ck-spacing-small)}.ck.ck-button.ck-button_with-keystroke .ck-button__label,a.ck.ck-button.ck-button_with-keystroke .ck-button__label{flex-grow:1}.ck.ck-button.ck-on,a.ck.ck-button.ck-on{background:var(--ck-color-button-on-background)}.ck.ck-button.ck-on:not(.ck-disabled):hover,a.ck.ck-button.ck-on:not(.ck-disabled):hover{background:var(--ck-color-button-on-hover-background)}.ck.ck-button.ck-on:not(.ck-disabled):active,a.ck.ck-button.ck-on:not(.ck-disabled):active{background:var(--ck-color-button-on-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-on-active-shadow)}.ck.ck-button.ck-on.ck-disabled,a.ck.ck-button.ck-on.ck-disabled{background:var(--ck-color-button-on-disabled-background)}.ck.ck-button.ck-button-save,a.ck.ck-button.ck-button-save{color:var(--ck-color-button-save)}.ck.ck-button.ck-button-cancel,a.ck.ck-button.ck-button-cancel{color:var(--ck-color-button-cancel)}.ck.ck-button-action,a.ck.ck-button-action{background:var(--ck-color-button-action-background)}.ck.ck-button-action:not(.ck-disabled):hover,a.ck.ck-button-action:not(.ck-disabled):hover{background:var(--ck-color-button-action-hover-background)}.ck.ck-button-action:not(.ck-disabled):active,a.ck.ck-button-action:not(.ck-disabled):active{background:var(--ck-color-button-action-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-action-active-shadow)}.ck.ck-button-action.ck-disabled,a.ck.ck-button-action.ck-disabled{background:var(--ck-color-button-action-disabled-background)}.ck.ck-button-action,a.ck.ck-button-action{color:var(--ck-color-button-action-text)}.ck.ck-button-bold,a.ck.ck-button-bold{font-weight:700}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./list.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-list{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none;display:flex;flex-direction:column}.ck.ck-list .ck-list__item,.ck.ck-list .ck-list__separator{display:block}.ck.ck-list .ck-list__item>:focus{position:relative;z-index:var(--ck-z-default)}.ck.ck-list{border-radius:0}.ck-rounded-corners .ck.ck-list,.ck.ck-list.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-list{list-style-type:none;background:var(--ck-color-list-background)}.ck.ck-list__item{cursor:default;min-width:12em}.ck.ck-list__item .ck-button{min-height:unset;width:100%;text-align:left;border-radius:0;padding:calc(0.2*var(--ck-line-height-base)*var(--ck-font-size-base)) calc(0.4*var(--ck-line-height-base)*var(--ck-font-size-base))}.ck.ck-list__item .ck-button .ck-button__label{line-height:calc(1.2*var(--ck-line-height-base)*var(--ck-font-size-base))}.ck.ck-list__item .ck-button:active{box-shadow:none}.ck.ck-list__item .ck-button.ck-on{background:var(--ck-color-list-button-on-background);color:var(--ck-color-list-button-on-text)}.ck.ck-list__item .ck-button.ck-on:active{box-shadow:none}.ck.ck-list__item .ck-button.ck-on:hover:not(.ck-disabled){background:var(--ck-color-list-button-on-background-focus)}.ck.ck-list__item .ck-button.ck-on:focus:not(.ck-disabled){border-color:var(--ck-color-base-background)}.ck.ck-list__item .ck-button:hover:not(.ck-disabled){background:var(--ck-color-list-button-hover-background)}.ck.ck-list__item .ck-switchbutton.ck-on{background:var(--ck-color-list-background);color:inherit}.ck.ck-list__item .ck-switchbutton.ck-on:hover:not(.ck-disabled){background:var(--ck-color-list-button-hover-background);color:inherit}.ck.ck-list__separator{height:1px;width:100%;background:var(--ck-color-base-border)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./switchbutton.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-button.ck-switchbutton .ck-button__toggle,.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{display:block}:root{--ck-switch-button-toggle-width:2.6153846154em;--ck-switch-button-toggle-inner-size:1.0769230769em;--ck-switch-button-toggle-spacing:1px;--ck-switch-button-translation:1.3846153847em}[dir=ltr] .ck.ck-button.ck-switchbutton .ck-button__label{margin-right:calc(2*var(--ck-spacing-large))}[dir=rtl] .ck.ck-button.ck-switchbutton .ck-button__label{margin-left:calc(2*var(--ck-spacing-large))}.ck.ck-button.ck-switchbutton .ck-button__toggle{border-radius:0}.ck-rounded-corners .ck.ck-button.ck-switchbutton .ck-button__toggle,.ck.ck-button.ck-switchbutton .ck-button__toggle.ck-rounded-corners{border-radius:var(--ck-border-radius)}[dir=ltr] .ck.ck-button.ck-switchbutton .ck-button__toggle{margin-left:auto}[dir=rtl] .ck.ck-button.ck-switchbutton .ck-button__toggle{margin-right:auto}.ck.ck-button.ck-switchbutton .ck-button__toggle{transition:background .4s ease;width:var(--ck-switch-button-toggle-width);background:var(--ck-color-switch-button-off-background)}.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{border-radius:0}.ck-rounded-corners .ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner,.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner.ck-rounded-corners{border-radius:var(--ck-border-radius);border-radius:calc(0.5*var(--ck-border-radius))}.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{margin:var(--ck-switch-button-toggle-spacing);width:var(--ck-switch-button-toggle-inner-size);height:var(--ck-switch-button-toggle-inner-size);background:var(--ck-color-switch-button-inner-background);transition:all .3s ease}.ck.ck-button.ck-switchbutton .ck-button__toggle:hover{background:var(--ck-color-switch-button-off-hover-background)}.ck.ck-button.ck-switchbutton .ck-button__toggle:hover .ck-button__toggle__inner{box-shadow:0 0 0 5px var(--ck-color-switch-button-inner-shadow)}.ck.ck-button.ck-switchbutton.ck-disabled .ck-button__toggle{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle{background:var(--ck-color-switch-button-on-background)}.ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle:hover{background:var(--ck-color-switch-button-on-hover-background)}[dir=ltr] .ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle .ck-button__toggle__inner{transform:translateX(var(--ck-switch-button-translation))}[dir=rtl] .ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle .ck-button__toggle__inner{transform:translateX(calc(-1*var(--ck-switch-button-translation)))}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./toolbardropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-toolbar-dropdown .ck.ck-toolbar .ck.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar-dropdown .ck-dropdown__panel .ck-button:focus{z-index:calc(var(--ck-z-default) + 1)}.ck.ck-toolbar-dropdown .ck-toolbar{border:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./listdropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-dropdown .ck-dropdown__panel .ck-list{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list,.ck.ck-dropdown .ck-dropdown__panel .ck-list.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0}.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button,.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button,.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-top-right-radius:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./toolbar.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-toolbar{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none;display:flex;flex-flow:row nowrap;align-items:center}.ck.ck-toolbar>.ck-toolbar__items{display:flex;flex-flow:row wrap;align-items:center;flex-grow:1}.ck.ck-toolbar .ck.ck-toolbar__separator{display:inline-block}.ck.ck-toolbar .ck.ck-toolbar__separator:first-child,.ck.ck-toolbar .ck.ck-toolbar__separator:last-child{display:none}.ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar.ck-toolbar_vertical>.ck-toolbar__items{flex-direction:column}.ck.ck-toolbar.ck-toolbar_floating>.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown>.ck-dropdown__button .ck-dropdown__arrow{display:none}.ck.ck-toolbar{border-radius:0}.ck-rounded-corners .ck.ck-toolbar,.ck.ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-toolbar{background:var(--ck-color-toolbar-background);padding:0 var(--ck-spacing-small);border:1px solid var(--ck-color-toolbar-border)}.ck.ck-toolbar>.ck-toolbar__items>*{margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small);margin-right:var(--ck-spacing-small)}.ck.ck-toolbar.ck-toolbar_vertical{padding:0}.ck.ck-toolbar.ck-toolbar_vertical>.ck-toolbar__items>.ck{width:100%;margin:0;border-radius:0;border:0}.ck.ck-toolbar>.ck-toolbar__items>*,.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small)}.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown>.ck.ck-button.ck-dropdown__button{padding-left:var(--ck-spacing-tiny)}.ck.ck-toolbar .ck.ck-toolbar__separator{align-self:stretch;width:1px;min-width:1px;margin-top:0;margin-bottom:0;background:var(--ck-color-toolbar-border)}.ck-toolbar-container .ck.ck-toolbar{border:0}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__grouped-dropdown,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{padding-right:var(--ck-spacing-small)}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__items>*,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__items>*{margin-left:var(--ck-spacing-small);margin-right:0}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__items>:last-child,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__items>:last-child{margin-left:0}.ck.ck-toolbar[dir=rtl].ck-toolbar_grouping>.ck-toolbar__items,[dir=rtl] .ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{margin-left:var(--ck-spacing-small)}.ck.ck-toolbar[dir=ltr]>.ck.ck-toolbar__grouped-dropdown,[dir=ltr] .ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{padding-left:var(--ck-spacing-small)}.ck.ck-toolbar[dir=ltr]>.ck.ck-toolbar__items>:last-child,[dir=ltr] .ck.ck-toolbar>.ck.ck-toolbar__items>:last-child{margin-right:0}.ck.ck-toolbar[dir=ltr].ck-toolbar_grouping>.ck-toolbar__items,[dir=ltr] .ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{margin-right:var(--ck-spacing-small)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./classiceditor.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor{position:relative}.ck.ck-editor .ck-editor__top .ck-sticky-panel .ck-toolbar{z-index:var(--ck-z-modal)}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius);border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-bottom-width:0}.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar{border-bottom-width:1px;border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius);border-radius:0}.ck.ck-editor__main>.ck-editor__editable{background:var(--ck-color-base-background);border-radius:0}.ck-rounded-corners .ck.ck-editor__main>.ck-editor__editable,.ck.ck-editor__main>.ck-editor__editable.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-top-right-radius:0}.ck.ck-editor__main>.ck-editor__editable:not(.ck-focused){border-color:var(--ck-color-base-border)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./blockquote.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content blockquote{overflow:hidden;padding-right:1.5em;padding-left:1.5em;margin-left:0;margin-right:0;font-style:italic;border-left:5px solid #ccc}.ck-content[dir=rtl] blockquote{border-left:0;border-right:5px solid #ccc}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./link.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-link_selected{background:var(--ck-color-link-selected-background)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./widget.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-color-resizer:var(--ck-color-focus-border);--ck-resizer-size:10px;--ck-resizer-border-width:1px;--ck-resizer-border-radius:2px;--ck-resizer-offset:calc(var(--ck-resizer-size)/-2 - 2px);--ck-resizer-tooltip-offset:10px;--ck-color-resizer-tooltip-background:#262626;--ck-color-resizer-tooltip-text:#f2f2f2}.ck .ck-widget.ck-widget_with-selection-handle{position:relative}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{position:absolute}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon{display:block}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle,.ck .ck-widget.ck-widget_with-selection-handle:hover .ck-widget__selection-handle{visibility:visible}.ck .ck-size-view{background:var(--ck-color-resizer-tooltip-background);color:var(--ck-color-resizer-tooltip-text);border:1px solid var(--ck-color-resizer-tooltip-text);border-radius:var(--ck-resizer-border-radius);font-size:var(--ck-font-size-tiny);display:block;padding:var(--ck-spacing-small)}.ck .ck-size-view.ck-orientation-bottom-left,.ck .ck-size-view.ck-orientation-bottom-right,.ck .ck-size-view.ck-orientation-top-left,.ck .ck-size-view.ck-orientation-top-right{position:absolute}.ck .ck-size-view.ck-orientation-top-left{top:var(--ck-resizer-tooltip-offset);left:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-top-right{top:var(--ck-resizer-tooltip-offset);right:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-bottom-right{bottom:var(--ck-resizer-tooltip-offset);right:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-bottom-left{bottom:var(--ck-resizer-tooltip-offset);left:var(--ck-resizer-tooltip-offset)}:root{--ck-widget-outline-thickness:3px;--ck-widget-handler-icon-size:16px;--ck-widget-handler-animation-duration:200ms;--ck-widget-handler-animation-curve:ease;--ck-color-widget-blurred-border:#dedede;--ck-color-widget-hover-border:#ffc83d;--ck-color-widget-editable-focus-background:var(--ck-color-base-background);--ck-color-widget-drag-handler-icon-color:var(--ck-color-base-background)}.ck .ck-widget{outline-width:var(--ck-widget-outline-thickness);outline-style:solid;outline-color:transparent;transition:outline-color var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve)}.ck .ck-widget.ck-widget_selected,.ck .ck-widget.ck-widget_selected:hover{outline:var(--ck-widget-outline-thickness) solid var(--ck-color-focus-border)}.ck .ck-widget:hover{outline-color:var(--ck-color-widget-hover-border)}.ck .ck-editor__nested-editable{border:1px solid transparent}.ck .ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck .ck-editor__nested-editable:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-inner-shadow),0 0;background-color:var(--ck-color-widget-editable-focus-background)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{padding:4px;box-sizing:border-box;background-color:transparent;opacity:0;transition:background-color var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve),visibility var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve),opacity var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve);border-radius:var(--ck-border-radius) var(--ck-border-radius) 0 0;transform:translateY(-100%);left:calc(0px - var(--ck-widget-outline-thickness))}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon{width:var(--ck-widget-handler-icon-size);height:var(--ck-widget-handler-icon-size);color:var(--ck-color-widget-drag-handler-icon-color)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator{opacity:0;transition:opacity .3s var(--ck-widget-handler-animation-curve)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle:hover .ck-icon .ck-icon__selected-indicator{opacity:1}.ck .ck-widget.ck-widget_with-selection-handle:hover .ck-widget__selection-handle{opacity:1;background-color:var(--ck-color-widget-hover-border)}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle,.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected:hover .ck-widget__selection-handle{opacity:1;background-color:var(--ck-color-focus-border)}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator,.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected:hover .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator{opacity:1}.ck-editor__editable>.ck-widget.ck-widget_with-selection-handle:first-child,.ck-editor__editable blockquote>.ck-widget.ck-widget_with-selection-handle:first-child{margin-top:calc(1em + var(--ck-widget-handler-icon-size))}.ck[dir=rtl] .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{left:auto;right:calc(0px - var(--ck-widget-outline-thickness))}.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover{outline-color:var(--ck-color-widget-blurred-border)}.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected.ck-widget_with-selection-handle .ck-widget__selection-handle,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected.ck-widget_with-selection-handle .ck-widget__selection-handle:hover,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover.ck-widget_with-selection-handle .ck-widget__selection-handle,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover.ck-widget_with-selection-handle .ck-widget__selection-handle:hover{background:var(--ck-color-widget-blurred-border)}.ck-editor__editable.ck-read-only .ck-widget{--ck-widget-outline-thickness:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./labeledinput.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-labeled-input .ck-labeled-input__status{font-size:var(--ck-font-size-small);margin-top:var(--ck-spacing-small);white-space:normal}.ck.ck-labeled-input .ck-labeled-input__status_error{color:var(--ck-color-base-error)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./inputtext.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-input-text-width:18em}.ck.ck-input-text{border-radius:0}.ck-rounded-corners .ck.ck-input-text,.ck.ck-input-text.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-input-text{box-shadow:var(--ck-inner-shadow),0 0;background:var(--ck-color-input-background);border:1px solid var(--ck-color-input-border);padding:var(--ck-spacing-extra-tiny) var(--ck-spacing-medium);min-width:var(--ck-input-text-width);min-height:var(--ck-ui-component-min-height);transition:box-shadow .2s ease-in-out,border .2s ease-in-out}.ck.ck-input-text:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-focus-outer-shadow),var(--ck-inner-shadow)}.ck.ck-input-text[readonly]{border:1px solid var(--ck-color-input-disabled-border);background:var(--ck-color-input-disabled-background);color:var(--ck-color-input-disabled-text)}.ck.ck-input-text[readonly]:focus{box-shadow:var(--ck-focus-disabled-outer-shadow),var(--ck-inner-shadow)}.ck.ck-input-text.ck-error{border-color:var(--ck-color-input-error-border);animation:ck-text-input-shake .3s ease both}.ck.ck-input-text.ck-error:focus{box-shadow:var(--ck-focus-error-outer-shadow),var(--ck-inner-shadow)}@keyframes ck-text-input-shake{20%{transform:translateX(-2px)}40%{transform:translateX(2px)}60%{transform:translateX(-1px)}80%{transform:translateX(1px)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./textalternativeform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-text-alternative-form{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-text-alternative-form .ck-labeled-input{display:inline-block}.ck.ck-text-alternative-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-text-alternative-form{flex-wrap:wrap}.ck.ck-text-alternative-form .ck-labeled-input{flex-basis:100%}.ck.ck-text-alternative-form .ck-button{flex-basis:50%}}.ck.ck-text-alternative-form{padding:var(--ck-spacing-standard)}.ck.ck-text-alternative-form:focus{outline:none}[dir=ltr] .ck.ck-text-alternative-form>:not(:first-child),[dir=rtl] .ck.ck-text-alternative-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-text-alternative-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-text-alternative-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-text-alternative-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-text-alternative-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-text-alternative-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-text-alternative-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-text-alternative-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-text-alternative-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./balloonpanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-balloon-panel-arrow-z-index:calc(var(--ck-z-default) - 3)}.ck.ck-balloon-panel{display:none;position:absolute;z-index:var(--ck-z-modal)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after,.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{content:\\\"\\\";position:absolute}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel[class*=arrow_n]:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel[class*=arrow_n]:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel[class*=arrow_s]:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel[class*=arrow_s]:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel.ck-balloon-panel_visible{display:block}:root{--ck-balloon-arrow-offset:2px;--ck-balloon-arrow-height:10px;--ck-balloon-arrow-half-width:8px}.ck.ck-balloon-panel{border-radius:0}.ck-rounded-corners .ck.ck-balloon-panel,.ck.ck-balloon-panel.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-balloon-panel{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after,.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{width:0;height:0;border-style:solid}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:var(--ck-balloon-arrow-height);border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:0}.ck.ck-balloon-panel[class*=arrow_n]:before{border-bottom-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-color:transparent;border-right-color:transparent;border-top-color:transparent}.ck.ck-balloon-panel[class*=arrow_n]:after{border-bottom-color:var(--ck-color-panel-background);margin-top:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:0;border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:var(--ck-balloon-arrow-height)}.ck.ck-balloon-panel[class*=arrow_s]:before{border-top-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-color:transparent;border-bottom-color:transparent;border-right-color:transparent}.ck.ck-balloon-panel[class*=arrow_s]:after{border-top-color:var(--ck-color-panel-background);margin-bottom:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:before{left:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:before{right:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:before{left:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:before{right:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./balloonrotator.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-balloon-rotator__navigation{display:flex;align-items:center;justify-content:center}.ck .ck-balloon-rotator__content .ck-toolbar{justify-content:center}.ck .ck-balloon-rotator__navigation{background:var(--ck-color-toolbar-background);border-bottom:1px solid var(--ck-color-toolbar-border);padding:0 var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation>*{margin-right:var(--ck-spacing-small);margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation .ck-balloon-rotator__counter{margin-right:var(--ck-spacing-standard);margin-left:var(--ck-spacing-small)}.ck .ck-balloon-rotator__content .ck.ck-annotation-wrapper{box-shadow:none}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./fakepanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-fake-panel{position:absolute;z-index:calc(var(--ck-z-modal) - 1)}.ck .ck-fake-panel div{position:absolute}.ck .ck-fake-panel div:first-child{z-index:2}.ck .ck-fake-panel div:nth-child(2){z-index:1}:root{--ck-balloon-fake-panel-offset-horizontal:6px;--ck-balloon-fake-panel-offset-vertical:6px}.ck .ck-fake-panel div{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border);border-radius:var(--ck-border-radius);width:100%;height:100%}.ck .ck-fake-panel div:first-child{margin-left:var(--ck-balloon-fake-panel-offset-horizontal);margin-top:var(--ck-balloon-fake-panel-offset-vertical)}.ck .ck-fake-panel div:nth-child(2){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*2);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*2)}.ck .ck-fake-panel div:nth-child(3){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*3);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*3)}.ck .ck-balloon-panel_arrow_s+.ck-fake-panel,.ck .ck-balloon-panel_arrow_se+.ck-fake-panel,.ck .ck-balloon-panel_arrow_sw+.ck-fake-panel{--ck-balloon-fake-panel-offset-vertical:-6px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./image.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .image{display:table;clear:both;text-align:center;margin:1em auto}.ck-content .image>img{display:block;margin:0 auto;max-width:100%;min-width:50px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadprogress.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor__editable .image{position:relative}.ck.ck-editor__editable .image .ck-progress-bar{position:absolute;top:0;left:0}.ck.ck-editor__editable .image.ck-appear{animation:fadeIn .7s}.ck.ck-editor__editable .image .ck-progress-bar{height:2px;width:0;background:var(--ck-color-upload-bar-background);transition:width .1s}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadicon.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-image-upload-complete-icon{display:block;position:absolute;top:10px;right:10px;border-radius:50%}.ck-image-upload-complete-icon:after{content:\\\"\\\";position:absolute}:root{--ck-color-image-upload-icon:#fff;--ck-color-image-upload-icon-background:#008a00;--ck-image-upload-icon-size:20px;--ck-image-upload-icon-width:2px}.ck-image-upload-complete-icon{width:var(--ck-image-upload-icon-size);height:var(--ck-image-upload-icon-size);opacity:0;background:var(--ck-color-image-upload-icon-background);animation-name:ck-upload-complete-icon-show,ck-upload-complete-icon-hide;animation-fill-mode:forwards,forwards;animation-duration:.5s,.5s;font-size:var(--ck-image-upload-icon-size);animation-delay:0ms,3s}.ck-image-upload-complete-icon:after{left:25%;top:50%;opacity:0;height:0;width:0;transform:scaleX(-1) rotate(135deg);transform-origin:left top;border-top:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);border-right:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);animation-name:ck-upload-complete-icon-check;animation-duration:.5s;animation-delay:.5s;animation-fill-mode:forwards;box-sizing:border-box}@keyframes ck-upload-complete-icon-show{0%{opacity:0}to{opacity:1}}@keyframes ck-upload-complete-icon-hide{0%{opacity:1}to{opacity:0}}@keyframes ck-upload-complete-icon-check{0%{opacity:1;width:0;height:0}33%{width:.3em;height:0}to{opacity:1;width:.3em;height:.45em}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadloader.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-upload-placeholder-loader{position:absolute;display:flex;align-items:center;justify-content:center;top:0;left:0}.ck .ck-upload-placeholder-loader:before{content:\\\"\\\";position:relative}:root{--ck-color-upload-placeholder-loader:#b3b3b3;--ck-upload-placeholder-loader-size:32px}.ck .ck-image-upload-placeholder{width:100%;margin:0}.ck .ck-upload-placeholder-loader{width:100%;height:100%}.ck .ck-upload-placeholder-loader:before{width:var(--ck-upload-placeholder-loader-size);height:var(--ck-upload-placeholder-loader-size);border-radius:50%;border-top:3px solid var(--ck-color-upload-placeholder-loader);border-right:2px solid transparent;animation:ck-upload-placeholder-loader 1s linear infinite}@keyframes ck-upload-placeholder-loader{to{transform:rotate(1turn)}}\"","module.exports = \".ck.ck-heading_heading1{font-size:20px}.ck.ck-heading_heading2{font-size:17px}.ck.ck-heading_heading3{font-size:14px}.ck[class*=ck-heading_heading]{font-weight:700}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__button .ck-button__label{width:8em}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__panel .ck-list__item{min-width:18em}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imagecaption.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:#333;background-color:#f7f7f7;padding:.6em;font-size:.75em;outline-offset:-1px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imagestyle.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-image-style-spacing:1.5em}.ck-content .image-style-align-center,.ck-content .image-style-align-left,.ck-content .image-style-align-right,.ck-content .image-style-side{max-width:50%}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing)}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content .image-style-align-right{float:right;margin-left:var(--ck-image-style-spacing)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./linkform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-link-form{display:flex}.ck.ck-link-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-link-form{flex-wrap:wrap}.ck.ck-link-form .ck-labeled-input{flex-basis:100%}.ck.ck-link-form .ck-button{flex-basis:50%}}.ck.ck-link-form_layout-vertical{display:block}.ck.ck-link-form{padding:var(--ck-spacing-standard)}.ck.ck-link-form:focus{outline:none}[dir=ltr] .ck.ck-link-form>:not(:first-child),[dir=rtl] .ck.ck-link-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}.ck.ck-link-form_layout-vertical{padding:0;min-width:var(--ck-input-text-width)}.ck.ck-link-form_layout-vertical .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) var(--ck-spacing-small)}.ck.ck-link-form_layout-vertical .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form_layout-vertical .ck-button{padding:var(--ck-spacing-standard);margin:0;border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border);width:50%}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}.ck.ck-link-form_layout-vertical .ck.ck-list{margin-left:0}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton{border:0;width:100%}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton:hover{background:none}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./linkactions.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-link-actions{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-link-actions .ck-link-actions__preview{display:inline-block}.ck.ck-link-actions .ck-link-actions__preview .ck-button__label{overflow:hidden}@media screen and (max-width:600px){.ck.ck-link-actions{flex-wrap:wrap}.ck.ck-link-actions .ck-link-actions__preview{flex-basis:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){flex-basis:50%}}.ck.ck-link-actions{padding:var(--ck-spacing-standard)}.ck.ck-link-actions .ck-button.ck-link-actions__preview{padding-left:0;padding-right:0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{padding:0 var(--ck-spacing-medium);color:var(--ck-color-link-default);text-overflow:ellipsis;cursor:pointer;max-width:var(--ck-input-text-width);min-width:3em;text-align:center}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label:hover{text-decoration:underline}.ck.ck-link-actions .ck-button.ck-link-actions__preview,.ck.ck-link-actions .ck-button.ck-link-actions__preview:active,.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus,.ck.ck-link-actions .ck-button.ck-link-actions__preview:hover{background:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:active{box-shadow:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus .ck-button__label{text-decoration:underline}.ck.ck-link-actions:focus{outline:none}[dir=ltr] .ck.ck-link-actions .ck-button:not(:first-child),[dir=rtl] .ck.ck-link-actions .ck-button:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-actions{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-actions .ck-button.ck-link-actions__preview{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{min-width:0;max-width:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaembedediting.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-media__wrapper .ck-media__placeholder{display:flex;flex-direction:column;align-items:center}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-tooltip{display:block}@media (hover:none){.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-tooltip{display:none}}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url{max-width:100%;position:relative}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url:hover .ck-tooltip{visibility:visible;opacity:1}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-media__placeholder__url__text{overflow:hidden;display:block}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"google.com/maps\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck-media__placeholder__icon *{display:none}.ck-editor__editable:not(.ck-read-only) .ck-media__wrapper>:not(.ck-media__placeholder),.ck-editor__editable:not(.ck-read-only) .ck-widget:not(.ck-widget_selected) .ck-media__placeholder{pointer-events:none}:root{--ck-media-embed-placeholder-icon-size:3em;--ck-color-media-embed-placeholder-url-text:#757575;--ck-color-media-embed-placeholder-url-text-hover:var(--ck-color-base-text)}.ck-media__wrapper{margin:0 auto}.ck-media__wrapper .ck-media__placeholder{padding:calc(3*var(--ck-spacing-standard));background:var(--ck-color-base-foreground)}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon{min-width:var(--ck-media-embed-placeholder-icon-size);height:var(--ck-media-embed-placeholder-icon-size);margin-bottom:var(--ck-spacing-large);background-position:50%;background-size:cover}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon .ck-icon{width:100%;height:100%}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url__text{color:var(--ck-color-media-embed-placeholder-url-text);white-space:nowrap;text-align:center;font-style:italic;text-overflow:ellipsis}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:var(--ck-color-media-embed-placeholder-url-text-hover);cursor:pointer;text-decoration:underline}.ck-media__wrapper[data-oembed-url*=\\\"open.spotify.com\\\"]{max-width:300px;max-height:380px}.ck-media__wrapper[data-oembed-url*=\\\"google.com/maps\\\"] .ck-media__placeholder__icon{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNTAuMzc4IiBoZWlnaHQ9IjI1NC4xNjciIHZpZXdCb3g9IjAgMCA2Ni4yNDYgNjcuMjQ4Ij48ZyB0cmFuc2Zvcm09InRyYW5zbGF0ZSgtMTcyLjUzMSAtMjE4LjQ1NSkgc2NhbGUoLjk4MDEyKSI+PHJlY3Qgcnk9IjUuMjM4IiByeD0iNS4yMzgiIHk9IjIzMS4zOTkiIHg9IjE3Ni4wMzEiIGhlaWdodD0iNjAuMDk5IiB3aWR0aD0iNjAuMDk5IiBmaWxsPSIjMzRhNjY4IiBwYWludC1vcmRlcj0ibWFya2VycyBzdHJva2UgZmlsbCIvPjxwYXRoIGQ9Ik0yMDYuNDc3IDI2MC45bC0yOC45ODcgMjguOTg3YTUuMjE4IDUuMjE4IDAgMDAzLjc4IDEuNjFoNDkuNjIxYzEuNjk0IDAgMy4xOS0uNzk4IDQuMTQ2LTIuMDM3eiIgZmlsbD0iIzVjODhjNSIvPjxwYXRoIGQ9Ik0yMjYuNzQyIDIyMi45ODhjLTkuMjY2IDAtMTYuNzc3IDcuMTctMTYuNzc3IDE2LjAxNC4wMDcgMi43NjIuNjYzIDUuNDc0IDIuMDkzIDcuODc1LjQzLjcwMy44MyAxLjQwOCAxLjE5IDIuMTA3LjMzMy41MDIuNjUgMS4wMDUuOTUgMS41MDguMzQzLjQ3Ny42NzMuOTU3Ljk4OCAxLjQ0IDEuMzEgMS43NjkgMi41IDMuNTAyIDMuNjM3IDUuMTY4Ljc5MyAxLjI3NSAxLjY4MyAyLjY0IDIuNDY2IDMuOTkgMi4zNjMgNC4wOTQgNC4wMDcgOC4wOTIgNC42IDEzLjkxNHYuMDEyYy4xODIuNDEyLjUxNi42NjYuODc5LjY2Ny40MDMtLjAwMS43NjgtLjMxNC45My0uNzk5LjYwMy01Ljc1NiAyLjIzOC05LjcyOSA0LjU4NS0xMy43OTQuNzgyLTEuMzUgMS42NzMtMi43MTUgMi40NjUtMy45OSAxLjEzNy0xLjY2NiAyLjMyOC0zLjQgMy42MzgtNS4xNjkuMzE1LS40ODIuNjQ1LS45NjIuOTg4LTEuNDM5LjMtLjUwMy42MTctMS4wMDYuOTUtMS41MDguMzU5LS43Ljc2LTEuNDA0IDEuMTktMi4xMDcgMS40MjYtMi40MDIgMi01LjExNCAyLjAwNC03Ljg3NSAwLTguODQ0LTcuNTExLTE2LjAxNC0xNi43NzYtMTYuMDE0eiIgZmlsbD0iI2RkNGIzZSIgcGFpbnQtb3JkZXI9Im1hcmtlcnMgc3Ryb2tlIGZpbGwiLz48ZWxsaXBzZSByeT0iNS41NjQiIHJ4PSI1LjgyOCIgY3k9IjIzOS4wMDIiIGN4PSIyMjYuNzQyIiBmaWxsPSIjODAyZDI3IiBwYWludC1vcmRlcj0ibWFya2VycyBzdHJva2UgZmlsbCIvPjxwYXRoIGQ9Ik0xOTAuMzAxIDIzNy4yODNjLTQuNjcgMC04LjQ1NyAzLjg1My04LjQ1NyA4LjYwNnMzLjc4NiA4LjYwNyA4LjQ1NyA4LjYwN2MzLjA0MyAwIDQuODA2LS45NTggNi4zMzctMi41MTYgMS41My0xLjU1NyAyLjA4Ny0zLjkxMyAyLjA4Ny02LjI5IDAtLjM2Mi0uMDIzLS43MjItLjA2NC0xLjA3OWgtOC4yNTd2My4wNDNoNC44NWMtLjE5Ny43NTktLjUzMSAxLjQ1LTEuMDU4IDEuOTg2LS45NDIuOTU4LTIuMDI4IDEuNTQ4LTMuOTAxIDEuNTQ4LTIuODc2IDAtNS4yMDgtMi4zNzItNS4yMDgtNS4yOTkgMC0yLjkyNiAyLjMzMi01LjI5OSA1LjIwOC01LjI5OSAxLjM5OSAwIDIuNjE4LjQwNyAzLjU4NCAxLjI5M2wyLjM4MS0yLjM4YzAtLjAwMi0uMDAzLS4wMDQtLjAwNC0uMDA1LTEuNTg4LTEuNTI0LTMuNjItMi4yMTUtNS45NTUtMi4yMTV6bTQuNDMgNS42NmwuMDAzLjAwNnYtLjAwM3oiIGZpbGw9IiNmZmYiIHBhaW50LW9yZGVyPSJtYXJrZXJzIHN0cm9rZSBmaWxsIi8+PHBhdGggZD0iTTIxNS4xODQgMjUxLjkyOWwtNy45OCA3Ljk3OSAyOC40NzcgMjguNDc1YTUuMjMzIDUuMjMzIDAgMDAuNDQ5LTIuMTIzdi0zMS4xNjVjLS40NjkuNjc1LS45MzQgMS4zNDktMS4zODIgMi4wMDUtLjc5MiAxLjI3NS0xLjY4MiAyLjY0LTIuNDY1IDMuOTktMi4zNDcgNC4wNjUtMy45ODIgOC4wMzgtNC41ODUgMTMuNzk0LS4xNjIuNDg1LS41MjcuNzk4LS45My43OTktLjM2My0uMDAxLS42OTctLjI1NS0uODc5LS42Njd2LS4wMTJjLS41OTMtNS44MjItMi4yMzctOS44Mi00LjYtMTMuOTE0LS43ODMtMS4zNS0xLjY3My0yLjcxNS0yLjQ2Ni0zLjk5LTEuMTM3LTEuNjY2LTIuMzI3LTMuNC0zLjYzNy01LjE2OWwtLjAwMi0uMDAzeiIgZmlsbD0iI2MzYzNjMyIvPjxwYXRoIGQ9Ik0yMTIuOTgzIDI0OC40OTVsLTM2Ljk1MiAzNi45NTN2LjgxMmE1LjIyNyA1LjIyNyAwIDAwNS4yMzggNS4yMzhoMS4wMTVsMzUuNjY2LTM1LjY2NmExMzYuMjc1IDEzNi4yNzUgMCAwMC0yLjc2NC0zLjkgMzcuNTc1IDM3LjU3NSAwIDAwLS45ODktMS40NCAzNS4xMjcgMzUuMTI3IDAgMDAtLjk1LTEuNTA4Yy0uMDgzLS4xNjItLjE3Ni0uMzI2LS4yNjQtLjQ4OXoiIGZpbGw9IiNmZGRjNGYiIHBhaW50LW9yZGVyPSJtYXJrZXJzIHN0cm9rZSBmaWxsIi8+PHBhdGggZD0iTTIxMS45OTggMjYxLjA4M2wtNi4xNTIgNi4xNTEgMjQuMjY0IDI0LjI2NGguNzgxYTUuMjI3IDUuMjI3IDAgMDA1LjIzOS01LjIzOHYtMS4wNDV6IiBmaWxsPSIjZmZmIiBwYWludC1vcmRlcj0ibWFya2VycyBzdHJva2UgZmlsbCIvPjwvZz48L3N2Zz4=)}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder{background:#4268b3}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder .ck-media__placeholder__icon{background-image:url(data:image/svg+xml;base64,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)}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder .ck-media__placeholder__url__text{color:#cdf}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder{background:linear-gradient(-135deg,#1400c8,#b900b4,#f50000)}.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder 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.ck-media__placeholder .ck-media__placeholder__url__text{color:#ffe0fe}.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder{background:linear-gradient(90deg,#71c6f4,#0d70a5)}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__icon{background-image:url(data:image/svg+xml;base64,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)}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__url__text{color:#b8e6ff}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-media-form{display:flex;align-items:flex-start;flex-direction:row;flex-wrap:nowrap}.ck.ck-media-form .ck-labeled-input{display:inline-block}.ck.ck-media-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-media-form{flex-wrap:wrap}.ck.ck-media-form .ck-labeled-input{flex-basis:100%}.ck.ck-media-form .ck-button{flex-basis:50%}}.ck.ck-media-form{padding:var(--ck-spacing-standard)}.ck.ck-media-form:focus{outline:none}[dir=ltr] .ck.ck-media-form>:not(:first-child),[dir=rtl] .ck.ck-media-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-media-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-media-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-media-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-media-form .ck-labeled-input .ck-labeled-input__error{white-space:normal}.ck.ck-media-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-media-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-media-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-media-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-media-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaembed.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .media{clear:both;margin:1em 0;display:block;min-width:15em}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./tableediting.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-color-table-focused-cell-background:#f5fafe}.ck-widget.table td.ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck-widget.table th.ck-editor__nested-editable.ck-editor__nested-editable_focused{background:var(--ck-color-table-focused-cell-background);border-style:none;outline:1px solid var(--ck-color-focus-border);outline-offset:-1px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./inserttable.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-insert-table-dropdown__grid{display:flex;flex-direction:row;flex-wrap:wrap}:root{--ck-insert-table-dropdown-padding:10px;--ck-insert-table-dropdown-box-height:11px;--ck-insert-table-dropdown-box-width:12px;--ck-insert-table-dropdown-box-margin:1px}.ck .ck-insert-table-dropdown__grid{width:calc(var(--ck-insert-table-dropdown-box-width)*10 + var(--ck-insert-table-dropdown-box-margin)*20 + var(--ck-insert-table-dropdown-padding)*2);padding:var(--ck-insert-table-dropdown-padding) var(--ck-insert-table-dropdown-padding) 0}.ck .ck-insert-table-dropdown__label{text-align:center}.ck .ck-insert-table-dropdown-grid-box{width:var(--ck-insert-table-dropdown-box-width);height:var(--ck-insert-table-dropdown-box-height);margin:var(--ck-insert-table-dropdown-box-margin);border:1px solid var(--ck-color-base-border);border-radius:1px}.ck .ck-insert-table-dropdown-grid-box.ck-on{border-color:var(--ck-color-focus-border);background:var(--ck-color-focus-outer-shadow)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./table.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .table{margin:1em auto;display:table}.ck-content .table table{border-collapse:collapse;border-spacing:0;border:1px double #b3b3b3}.ck-content .table table td,.ck-content .table table th{min-width:2em;padding:.4em;border-color:#d9d9d9}.ck-content .table table th{font-weight:700;background:#fafafa}\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/conversion\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport UpcastHelpers from './upcasthelpers';\nimport DowncastHelpers from './downcasthelpers';\n\n/**\n * A utility class that helps add converters to upcast and downcast dispatchers.\n *\n * We recommend reading the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide first to\n * understand the core concepts of the conversion mechanisms.\n *\n * An instance of the conversion manager is available in the\n * {@link module:core/editor/editor~Editor#conversion `editor.conversion`} property\n * and by default has the following groups of dispatchers (i.e. directions of conversion):\n *\n * * `downcast` (editing and data downcasts)\n * * `editingDowncast`\n * * `dataDowncast`\n * * `upcast`\n *\n * # One-way converters\n *\n * To add a converter to a specific group, use the {@link module:engine/conversion/conversion~Conversion#for `for()`}\n * method:\n *\n *\t\t// Add a converter to editing downcast and data downcast.\n *\t\teditor.conversion.for( 'downcast' ).elementToElement( config ) );\n *\n *\t\t// Add a converter to the data pipepline only:\n *\t\teditor.conversion.for( 'dataDowncast' ).elementToElement( dataConversionConfig ) );\n *\n *\t\t// And a slightly different one for the editing pipeline:\n *\t\teditor.conversion.for( 'editingDowncast' ).elementToElement( editingConversionConfig ) );\n *\n * See {@link module:engine/conversion/conversion~Conversion#for `for()`} method documentation to learn more about\n * available conversion helpers and how to use your custom ones.\n *\n * # Two-way converters\n *\n * Besides using one-way converters via the `for()` method, you can also use other methods available in this\n * class to add two-way converters (upcast and downcast):\n *\n * * {@link module:engine/conversion/conversion~Conversion#elementToElement `elementToElement()`} –\n * Model element to view element and vice versa.\n * * {@link module:engine/conversion/conversion~Conversion#attributeToElement `attributeToElement()`} –\n * Model attribute to view element and vice versa.\n * * {@link module:engine/conversion/conversion~Conversion#attributeToAttribute `attributeToAttribute()`} –\n * Model attribute to view element and vice versa.\n */\nexport default class Conversion {\n\t/**\n\t * Creates a new conversion instance.\n\t *\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher>} downcastDispatchers\n\t * @param {module:engine/conversion/upcastdispatcher~UpcastDispatcher|\n\t * Array.<module:engine/conversion/upcastdispatcher~UpcastDispatcher>} upcastDispatchers\n\t */\n\tconstructor( downcastDispatchers, upcastDispatchers ) {\n\t\t/**\n\t\t * Maps dispatchers group name to ConversionHelpers instances.\n\t\t *\n\t\t * @private\n\t\t * @member {Map.<String,module:engine/conversion/conversionhelpers~ConversionHelpers>}\n\t\t */\n\t\tthis._helpers = new Map();\n\n\t\t// Define default 'downcast' & 'upcast' dispatchers groups. Those groups are always available as two-way converters needs them.\n\t\tthis._downcast = Array.isArray( downcastDispatchers ) ? downcastDispatchers : [ downcastDispatchers ];\n\t\tthis._createConversionHelpers( { name: 'downcast', dispatchers: this._downcast, isDowncast: true } );\n\n\t\tthis._upcast = Array.isArray( upcastDispatchers ) ? upcastDispatchers : [ upcastDispatchers ];\n\t\tthis._createConversionHelpers( { name: 'upcast', dispatchers: this._upcast, isDowncast: false } );\n\t}\n\n\t/**\n\t * Define an alias for registered dispatcher.\n\t *\n\t *\t\tconst conversion = new Conversion(\n\t *\t\t\t[ dataDowncastDispatcher, editingDowncastDispatcher ],\n\t *\t\t\tupcastDispatcher\n\t *\t\t);\n\t *\n\t *\t\tconversion.addAlias( 'dataDowncast', dataDowncastDispatcher );\n\t *\n\t * @param {String} alias An alias of a dispatcher.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher} dispatcher Dispatcher which should have an alias.\n\t */\n\taddAlias( alias, dispatcher ) {\n\t\tconst isDowncast = this._downcast.includes( dispatcher );\n\t\tconst isUpcast = this._upcast.includes( dispatcher );\n\n\t\tif ( !isUpcast && !isDowncast ) {\n\t\t\t/**\n\t\t\t * Trying to register and alias for a dispatcher that nas not been registered.\n\t\t\t *\n\t\t\t * @error conversion-add-alias-dispatcher-not-registered\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'conversion-add-alias-dispatcher-not-registered: ' +\n\t\t\t\t'Trying to register and alias for a dispatcher that nas not been registered.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tthis._createConversionHelpers( { name: alias, dispatchers: [ dispatcher ], isDowncast } );\n\t}\n\n\t/**\n\t * Provides a chainable API to assign converters to conversion dispatchers group.\n\t *\n\t * If the given group name has not been registered, the\n\t * {@link module:utils/ckeditorerror~CKEditorError `conversion-for-unknown-group` error} is thrown.\n\t *\n\t * You can use conversion helpers available directly in the `for()` chain or your custom ones via\n\t * the {@link module:engine/conversion/conversionhelpers~ConversionHelpers#add `add()`} method.\n\t *\n\t * # Using bulit-in conversion helpers\n\t *\n\t * The `for()` chain comes with a set of conversion helpers which you can use like this:\n\t *\n\t *\t\teditor.conversion.for( 'downcast' )\n\t *\t\t\t.elementToElement( config1 ) // Adds an element-to-element downcast converter.\n\t *\t\t\t.attributeToElement( config2 ); // Adds an attribute-to-element downcast converter.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' )\n\t *\t\t\t.elementToAttribute( config3 ); // Adds an element-to-attribute upcast converter.\n\t *\n\t * Refer to the documentation of built-in conversion helpers to learn about their configuration options.\n\t *\n\t * * downcast (model-to-view) conversion helpers:\n\t *\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`},\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement `attributeToElement()`},\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToAttribute `attributeToAttribute()`}.\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#markerToElement `markerToElement()`}.\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#markerToHighlight `markerToHighlight()`}.\n\t *\n\t * * upcast (view-to-model) conversion helpers:\n\t *\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToElement `elementToElement()`},\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToAttribute `elementToAttribute()`},\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#attributeToAttribute `attributeToAttribute()`}.\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToMarker `elementToMarker()`}.\n\t *\n\t * # Using custom conversion helpers\n\t *\n\t * If you need to implement a nontypical converter, you can do so by calling:\n\t *\n\t *\t\teditor.conversion.for( direction ).add( customHelper );\n\t *\n\t * The `.add()` method takes exactly one parameter, which is a function. This function should accept one parameter that\n\t * is a dispatcher instance. The function should add an actual converter to the passed dispatcher instance.\n\t *\n\t * Example:\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).add( dispatcher => {\n\t *\t\t\tdispatcher.on( 'element:a', ( evt, data, conversionApi ) => {\n\t *\t\t\t\t// Do something with a view <a> element.\n\t *\t\t\t} );\n\t *\t\t} );\n\t *\n\t * Refer to the documentation of {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n\t * and {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} to learn how to write\n\t * custom converters.\n\t *\n\t * @param {String} groupName The name of dispatchers group to add the converters to.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers|module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tfor( groupName ) {\n\t\tif ( !this._helpers.has( groupName ) ) {\n\t\t\t/**\n\t\t\t * Trying to add a converter to an unknown dispatchers group.\n\t\t\t *\n\t\t\t * @error conversion-for-unknown-group\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'conversion-for-unknown-group: Trying to add a converter to an unknown dispatchers group.', this );\n\t\t}\n\n\t\treturn this._helpers.get( groupName );\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model element to a view element (and vice versa).\n\t * For example, the model `<paragraph>Foo</paragraph>` is `<p>Foo</p>` in the view.\n\t *\n\t *\t\t// A simple conversion from the `paragraph` model element to the `<p>` view element (and vice versa).\n\t *\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'p' } );\n\t *\n\t *\t\t// Override other converters by specifying a converter definition with a higher priority.\n\t *\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'div', converterPriority: 'high' } );\n\t *\n\t *\t\t// View specified as an object instead of a string.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'fancyParagraph',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to a `paragraph` element.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'p',\n\t *\t\t\tupcastAlso: [\n\t *\t\t\t\t'div',\n\t *\t\t\t\t{\n\t *\t\t\t\t\t// Any element with the `display: block` style.\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\tdisplay: 'block'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// `upcastAlso` set as callback enables a conversion of a wide range of different view elements.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'heading',\n\t *\t\t\tview: 'h2',\n\t *\t\t\t// Convert \"headling-like\" paragraphs to headings.\n\t *\t\t\tupcastAlso: viewElement => {\n\t *\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\tif ( size > 26 ) {\n\t *\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\treturn null;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * `definition.model` is a `String` with a model element name to convert from or to.\n\t * See {@link module:engine/conversion/conversion~ConverterDefinition} to learn about other parameters.\n\t *\n\t * @param {module:engine/conversion/conversion~ConverterDefinition} definition The converter definition.\n\t */\n\telementToElement( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).elementToElement( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.elementToElement( {\n\t\t\t\t\tmodel,\n\t\t\t\t\tview,\n\t\t\t\t\tconverterPriority: definition.converterPriority\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model attribute to a view element (and vice versa).\n\t * For example, a model text node with `\"Foo\"` as data and the `bold` attribute is `<strong>Foo</strong>` in the view.\n\t *\n\t *\t\t// A simple conversion from the `bold=true` attribute to the `<strong>` view element (and vice versa).\n\t *\t\teditor.conversion.attributeToElement( { model: 'bold', view: 'strong' } );\n\t *\n\t *\t\t// Override other converters by specifying a converter definition with a higher priority.\n\t *\t\teditor.conversion.attributeToElement( { model: 'bold', view: 'b', converterPriority: 'high' } );\n\t *\n\t *\t\t// View specified as an object instead of a string.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: 'bold'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `config.model.name` to define the conversion only from a given node type, `$text` in this case.\n\t *\t\t// The same attribute on different elements may then be handled by a different converter.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'textDecoration',\n\t *\t\t\t\tvalues: [ 'underline', 'lineThrough' ],\n\t *\t\t\t\tname: '$text'\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tunderline: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-decoration': 'underline'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tlineThrough: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-decoration': 'line-through'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to the `bold` attribute.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'strong',\n\t *\t\t\tupcastAlso: [\n\t *\t\t\t\t'b',\n\t *\t\t\t\t{\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tclasses: 'bold'\n\t *\t\t\t\t},\n\t *\t\t\t\t{\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-weight': 'bold'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tviewElement => {\n\t *\t\t\t\t\tconst fontWeight = viewElement.getStyle( 'font-weight' );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && fontWeight && /\\d+/.test() && Number( fontWeight ) > 500 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn {\n\t *\t\t\t\t\t\t\tname: true,\n\t *\t\t\t\t\t\t\tstyles: [ 'font-weight' ]\n\t *\t\t\t\t\t\t};\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Conversion from and to a model attribute key whose value is an enum (`fontSize=big|small`).\n\t *\t\t// `upcastAlso` set as callback enables a conversion of a wide range of different view elements.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalues: [ 'big', 'small' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tbig: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '1.2em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '0.8em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tupcastAlso: {\n\t *\t\t\t\tbig: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && size > 10 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && size < 10 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * The `definition.model` parameter specifies which model attribute should be converted from or to. It can be a `{ key, value }` object\n\t * describing the attribute key and value to convert or a `String` specifying just the attribute key (then `value` is set to `true`).\n\t * See {@link module:engine/conversion/conversion~ConverterDefinition} to learn about other parameters.\n\t *\n\t * @param {module:engine/conversion/conversion~ConverterDefinition} definition The converter definition.\n\t */\n\tattributeToElement( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).attributeToElement( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.elementToAttribute( {\n\t\t\t\t\tview,\n\t\t\t\t\tmodel,\n\t\t\t\t\tconverterPriority: definition.converterPriority\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model attribute to a view attribute (and vice versa).\n\t * For example, `<image src='foo.jpg'></image>` is converted to `<img src='foo.jpg'></img>` (the same attribute key and value).\n\t * This type of converters is intended to be used with {@link module:engine/model/element~Element model element} nodes.\n\t * To convert text attributes {@link module:engine/conversion/conversion~Conversion#attributeToElement `attributeToElement converter`}\n\t * should be set up.\n\t *\n\t *\t\t// A simple conversion from the `source` model attribute to the `src` view attribute (and vice versa).\n\t *\t\teditor.conversion.attributeToAttribute( { model: 'source', view: 'src' } );\n\t *\n\t *\t\t// Attribute values are strictly specified.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'aside',\n\t *\t\t\t\tvalues: [ 'aside' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\taside: {\n\t *\t\t\t\t\tname: 'img',\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'aside', 'half-size' ]\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Set the style attribute.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'aside',\n\t *\t\t\t\tvalues: [ 'aside' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\taside: {\n\t *\t\t\t\t\tname: 'img',\n\t *\t\t\t\t\tkey: 'style',\n\t *\t\t\t\t\tvalue: {\n\t *\t\t\t\t\t\tfloat: 'right',\n\t *\t\t\t\t\t\twidth: '50%',\n\t *\t\t\t\t\t\tmargin: '5px'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Conversion from and to a model attribute key whose value is an enum (`align=right|center`).\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to the `align=right` attribute.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'align',\n\t *\t\t\t\tvalues: [ 'right', 'center' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tright: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: 'align-right'\n\t *\t\t\t\t},\n\t *\t\t\t\tcenter: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: 'align-center'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tupcastAlso: {\n\t *\t\t\t\tright: {\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-align': 'right'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tcenter: {\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-align': 'center'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * The `definition.model` parameter specifies which model attribute should be converted from and to.\n\t * It can be a `{ key, [ values ], [ name ] }` object or a `String`, which will be treated like `{ key: definition.model }`.\n\t * The `key` property is the model attribute key to convert from and to.\n\t * The `values` are the possible model attribute values. If `values` is not set, the model attribute value will be the same as the\n\t * view attribute value.\n\t * If `name` is set, the conversion will be set up only for model elements with the given name.\n\t *\n\t * The `definition.view` parameter specifies which view attribute should be converted from and to.\n\t * It can be a `{ key, value, [ name ] }` object or a `String`, which will be treated like `{ key: definition.view }`.\n\t * The `key` property is the view attribute key to convert from and to.\n\t * The `value` is the view attribute value to convert from and to. If `definition.value` is not set, the view attribute value will be\n\t * the same as the model attribute value.\n\t * If `key` is `'class'`, `value` can be a `String` or an array of `String`s.\n\t * If `key` is `'style'`, `value` is an object with key-value pairs.\n\t * In other cases, `value` is a `String`.\n\t * If `name` is set, the conversion will be set up only for model elements with the given name.\n\t * If `definition.model.values` is set, `definition.view` is an object that assigns values from `definition.model.values`\n\t * to `{ key, value, [ name ] }` objects.\n\t *\n\t * `definition.upcastAlso` specifies which other matching view elements should also be upcast to the given model configuration.\n\t * If `definition.model.values` is set, `definition.upcastAlso` should be an object assigning values from `definition.model.values`\n\t * to {@link module:engine/view/matcher~MatcherPattern}s or arrays of {@link module:engine/view/matcher~MatcherPattern}s.\n\t *\n\t * **Note:** `definition.model` and `definition.view` form should be mirrored, so the same types of parameters should\n\t * be given in both parameters.\n\t *\n\t * @param {Object} definition The converter definition.\n\t * @param {String|Object} definition.model The model attribute to convert from and to.\n\t * @param {String|Object} definition.view The view attribute to convert from and to.\n\t * @param {module:engine/view/matcher~MatcherPattern|Array.<module:engine/view/matcher~MatcherPattern>} [definition.upcastAlso]\n\t * Any view element matching `definition.upcastAlso` will also be converted to the given model attribute. `definition.upcastAlso`\n\t * is used only if `config.model.values` is specified.\n\t */\n\tattributeToAttribute( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).attributeToAttribute( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.attributeToAttribute( {\n\t\t\t\t\tview,\n\t\t\t\t\tmodel\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and caches conversion helpers for given dispatchers group.\n\t *\n\t * @private\n\t * @param {Object} options\n\t * @param {String} options.name Group name.\n\t * @param {Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher>} options.dispatchers\n\t * @param {Boolean} options.isDowncast\n\t */\n\t_createConversionHelpers( { name, dispatchers, isDowncast } ) {\n\t\tif ( this._helpers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Trying to register a group name that has already been registered.\n\t\t\t *\n\t\t\t * @error conversion-group-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'conversion-group-exists: Trying to register a group name that has already been registered.', this );\n\t\t}\n\n\t\tconst helpers = isDowncast ? new DowncastHelpers( dispatchers ) : new UpcastHelpers( dispatchers );\n\n\t\tthis._helpers.set( name, helpers );\n\t}\n}\n\n/**\n * Defines how the model should be converted from and to the view.\n *\n * @typedef {Object} module:engine/conversion/conversion~ConverterDefinition\n *\n * @property {*} [model] The model conversion definition. Describes the model element or model attribute to convert. This parameter differs\n * for different functions that accept `ConverterDefinition`. See the description of the function to learn how to set it.\n * @property {module:engine/view/elementdefinition~ElementDefinition|Object} view The definition of the view element to convert from and\n * to. If `model` describes multiple values, `view` is an object that assigns these values (`view` object keys) to view element definitions\n * (`view` object values).\n * @property {module:engine/view/matcher~MatcherPattern|Array.<module:engine/view/matcher~MatcherPattern>} [upcastAlso]\n * Any view element matching `upcastAlso` will also be converted to the model. If `model` describes multiple values, `upcastAlso`\n * is an object that assigns these values (`upcastAlso` object keys) to {@link module:engine/view/matcher~MatcherPattern}s\n * (`upcastAlso` object values).\n * @property {module:utils/priorities~PriorityString} [converterPriority] The converter priority.\n */\n\n// Helper function that creates a joint array out of an item passed in `definition.view` and items passed in\n// `definition.upcastAlso`.\n//\n// @param {module:engine/conversion/conversion~ConverterDefinition} definition\n// @returns {Array} Array containing view definitions.\nfunction* _getAllUpcastDefinitions( definition ) {\n\tif ( definition.model.values ) {\n\t\tfor ( const value of definition.model.values ) {\n\t\t\tconst model = { key: definition.model.key, value };\n\t\t\tconst view = definition.view[ value ];\n\t\t\tconst upcastAlso = definition.upcastAlso ? definition.upcastAlso[ value ] : undefined;\n\n\t\t\tyield* _getUpcastDefinition( model, view, upcastAlso );\n\t\t}\n\t} else {\n\t\tyield* _getUpcastDefinition( definition.model, definition.view, definition.upcastAlso );\n\t}\n}\n\nfunction* _getUpcastDefinition( model, view, upcastAlso ) {\n\tyield { model, view };\n\n\tif ( upcastAlso ) {\n\t\tupcastAlso = Array.isArray( upcastAlso ) ? upcastAlso : [ upcastAlso ];\n\n\t\tfor ( const upcastAlsoItem of upcastAlso ) {\n\t\t\tyield { model, view: upcastAlsoItem };\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/utils\n */\n\n/**\n * Returns attributes that should be preserved on the enter key.\n *\n * Filtering is realized based on `copyOnEnter` attribute property. Read more about attribute properties\n * {@link module:engine/model/schema~Schema#setAttributeProperties here}.\n *\n * @param {module:engine/model/schema~Schema} schema\n * @param {Iterable.<*>} allAttributes attributes to filter.\n * @returns {Iterable.<*>}\n */\nexport function* getCopyOnEnterAttributes( schema, allAttributes ) {\n\tfor ( const attribute of allAttributes ) {\n\t\tif ( attribute && schema.getAttributeProperties( attribute[ 0 ] ).copyOnEnter ) {\n\t\t\tyield attribute;\n\t\t}\n\t}\n}\n","import root from './_root.js';\n\n/** Built-in value references. */\nvar Symbol = root.Symbol;\n\nexport default Symbol;\n","import Symbol from './_Symbol.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n var isOwn = hasOwnProperty.call(value, symToStringTag),\n tag = value[symToStringTag];\n\n try {\n value[symToStringTag] = undefined;\n var unmasked = true;\n } catch (e) {}\n\n var result = nativeObjectToString.call(value);\n if (unmasked) {\n if (isOwn) {\n value[symToStringTag] = tag;\n } else {\n delete value[symToStringTag];\n }\n }\n return result;\n}\n\nexport default getRawTag;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n return nativeObjectToString.call(value);\n}\n\nexport default objectToString;\n","import Symbol from './_Symbol.js';\nimport getRawTag from './_getRawTag.js';\nimport objectToString from './_objectToString.js';\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]',\n undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n if (value == null) {\n return value === undefined ? undefinedTag : nullTag;\n }\n return (symToStringTag && symToStringTag in Object(value))\n ? getRawTag(value)\n : objectToString(value);\n}\n\nexport default baseGetTag;\n","/**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\nfunction overArg(func, transform) {\n return function(arg) {\n return func(transform(arg));\n };\n}\n\nexport default overArg;\n","import overArg from './_overArg.js';\n\n/** Built-in value references. */\nvar getPrototype = overArg(Object.getPrototypeOf, Object);\n\nexport default getPrototype;\n","/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n return value != null && typeof value == 'object';\n}\n\nexport default isObjectLike;\n","import baseGetTag from './_baseGetTag.js';\nimport getPrototype from './_getPrototype.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to infer the `Object` constructor. */\nvar objectCtorString = funcToString.call(Object);\n\n/**\n * Checks if `value` is a plain object, that is, an object created by the\n * `Object` constructor or one with a `[[Prototype]]` of `null`.\n *\n * @static\n * @memberOf _\n * @since 0.8.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * _.isPlainObject(new Foo);\n * // => false\n *\n * _.isPlainObject([1, 2, 3]);\n * // => false\n *\n * _.isPlainObject({ 'x': 0, 'y': 0 });\n * // => true\n *\n * _.isPlainObject(Object.create(null));\n * // => true\n */\nfunction isPlainObject(value) {\n if (!isObjectLike(value) || baseGetTag(value) != objectTag) {\n return false;\n }\n var proto = getPrototype(value);\n if (proto === null) {\n return true;\n }\n var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;\n return typeof Ctor == 'function' && Ctor instanceof Ctor &&\n funcToString.call(Ctor) == objectCtorString;\n}\n\nexport default isPlainObject;\n","/**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\nfunction eq(value, other) {\n return value === other || (value !== value && other !== other);\n}\n\nexport default eq;\n","import eq from './eq.js';\n\n/**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction assocIndexOf(array, key) {\n var length = array.length;\n while (length--) {\n if (eq(array[length][0], key)) {\n return length;\n }\n }\n return -1;\n}\n\nexport default assocIndexOf;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/** Used for built-in method references. */\nvar arrayProto = Array.prototype;\n\n/** Built-in value references. */\nvar splice = arrayProto.splice;\n\n/**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction listCacheDelete(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n return false;\n }\n var lastIndex = data.length - 1;\n if (index == lastIndex) {\n data.pop();\n } else {\n splice.call(data, index, 1);\n }\n --this.size;\n return true;\n}\n\nexport default listCacheDelete;\n","import listCacheClear from './_listCacheClear.js';\nimport listCacheDelete from './_listCacheDelete.js';\nimport listCacheGet from './_listCacheGet.js';\nimport listCacheHas from './_listCacheHas.js';\nimport listCacheSet from './_listCacheSet.js';\n\n/**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction ListCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `ListCache`.\nListCache.prototype.clear = listCacheClear;\nListCache.prototype['delete'] = listCacheDelete;\nListCache.prototype.get = listCacheGet;\nListCache.prototype.has = listCacheHas;\nListCache.prototype.set = listCacheSet;\n\nexport default ListCache;\n","/**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\nfunction listCacheClear() {\n this.__data__ = [];\n this.size = 0;\n}\n\nexport default listCacheClear;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction listCacheGet(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n return index < 0 ? undefined : data[index][1];\n}\n\nexport default listCacheGet;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction listCacheHas(key) {\n return assocIndexOf(this.__data__, key) > -1;\n}\n\nexport default listCacheHas;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\nfunction listCacheSet(key, value) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n ++this.size;\n data.push([key, value]);\n } else {\n data[index][1] = value;\n }\n return this;\n}\n\nexport default listCacheSet;\n","import coreJsData from './_coreJsData.js';\n\n/** Used to detect methods masquerading as native. */\nvar maskSrcKey = (function() {\n var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n return uid ? ('Symbol(src)_1.' + uid) : '';\n}());\n\n/**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\nfunction isMasked(func) {\n return !!maskSrcKey && (maskSrcKey in func);\n}\n\nexport default isMasked;\n","/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n var type = typeof value;\n return value != null && (type == 'object' || type == 'function');\n}\n\nexport default isObject;\n","import baseGetTag from './_baseGetTag.js';\nimport isObject from './isObject.js';\n\n/** `Object#toString` result references. */\nvar asyncTag = '[object AsyncFunction]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n proxyTag = '[object Proxy]';\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n if (!isObject(value)) {\n return false;\n }\n // The use of `Object#toString` avoids issues with the `typeof` operator\n // in Safari 9 which returns 'object' for typed arrays and other constructors.\n var tag = baseGetTag(value);\n return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n}\n\nexport default isFunction;\n","import root from './_root.js';\n\n/** Used to detect overreaching core-js shims. */\nvar coreJsData = root['__core-js_shared__'];\n\nexport default coreJsData;\n","/** Used for built-in method references. */\nvar funcProto = Function.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to convert.\n * @returns {string} Returns the source code.\n */\nfunction toSource(func) {\n if (func != null) {\n try {\n return funcToString.call(func);\n } catch (e) {}\n try {\n return (func + '');\n } catch (e) {}\n }\n return '';\n}\n\nexport default toSource;\n","import isFunction from './isFunction.js';\nimport isMasked from './_isMasked.js';\nimport isObject from './isObject.js';\nimport toSource from './_toSource.js';\n\n/**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\nvar reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g;\n\n/** Used to detect host constructors (Safari). */\nvar reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n/** Used for built-in method references. */\nvar funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to detect if a method is native. */\nvar reIsNative = RegExp('^' +\n funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n);\n\n/**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n */\nfunction baseIsNative(value) {\n if (!isObject(value) || isMasked(value)) {\n return false;\n }\n var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n return pattern.test(toSource(value));\n}\n\nexport default baseIsNative;\n","import baseIsNative from './_baseIsNative.js';\nimport getValue from './_getValue.js';\n\n/**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\nfunction getNative(object, key) {\n var value = getValue(object, key);\n return baseIsNative(value) ? value : undefined;\n}\n\nexport default getNative;\n","/**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\nfunction getValue(object, key) {\n return object == null ? undefined : object[key];\n}\n\nexport default getValue;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Map = getNative(root, 'Map');\n\nexport default Map;\n","import getNative from './_getNative.js';\n\n/* Built-in method references that are verified to be native. */\nvar nativeCreate = getNative(Object, 'create');\n\nexport default nativeCreate;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction hashGet(key) {\n var data = this.__data__;\n if (nativeCreate) {\n var result = data[key];\n return result === HASH_UNDEFINED ? undefined : result;\n }\n return hasOwnProperty.call(data, key) ? data[key] : undefined;\n}\n\nexport default hashGet;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction hashHas(key) {\n var data = this.__data__;\n return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n}\n\nexport default hashHas;\n","import hashClear from './_hashClear.js';\nimport hashDelete from './_hashDelete.js';\nimport hashGet from './_hashGet.js';\nimport hashHas from './_hashHas.js';\nimport hashSet from './_hashSet.js';\n\n/**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Hash(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `Hash`.\nHash.prototype.clear = hashClear;\nHash.prototype['delete'] = hashDelete;\nHash.prototype.get = hashGet;\nHash.prototype.has = hashHas;\nHash.prototype.set = hashSet;\n\nexport default Hash;\n","import nativeCreate from './_nativeCreate.js';\n\n/**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\nfunction hashClear() {\n this.__data__ = nativeCreate ? nativeCreate(null) : {};\n this.size = 0;\n}\n\nexport default hashClear;\n","/**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction hashDelete(key) {\n var result = this.has(key) && delete this.__data__[key];\n this.size -= result ? 1 : 0;\n return result;\n}\n\nexport default hashDelete;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\nfunction hashSet(key, value) {\n var data = this.__data__;\n this.size += this.has(key) ? 0 : 1;\n data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n return this;\n}\n\nexport default hashSet;\n","import isKeyable from './_isKeyable.js';\n\n/**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\nfunction getMapData(map, key) {\n var data = map.__data__;\n return isKeyable(key)\n ? data[typeof key == 'string' ? 'string' : 'hash']\n : data.map;\n}\n\nexport default getMapData;\n","/**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\nfunction isKeyable(value) {\n var type = typeof value;\n return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n ? (value !== '__proto__')\n : (value === null);\n}\n\nexport default isKeyable;\n","import mapCacheClear from './_mapCacheClear.js';\nimport mapCacheDelete from './_mapCacheDelete.js';\nimport mapCacheGet from './_mapCacheGet.js';\nimport mapCacheHas from './_mapCacheHas.js';\nimport mapCacheSet from './_mapCacheSet.js';\n\n/**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction MapCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `MapCache`.\nMapCache.prototype.clear = mapCacheClear;\nMapCache.prototype['delete'] = mapCacheDelete;\nMapCache.prototype.get = mapCacheGet;\nMapCache.prototype.has = mapCacheHas;\nMapCache.prototype.set = mapCacheSet;\n\nexport default MapCache;\n","import Hash from './_Hash.js';\nimport ListCache from './_ListCache.js';\nimport Map from './_Map.js';\n\n/**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\nfunction mapCacheClear() {\n this.size = 0;\n this.__data__ = {\n 'hash': new Hash,\n 'map': new (Map || ListCache),\n 'string': new Hash\n };\n}\n\nexport default mapCacheClear;\n","import getMapData from './_getMapData.js';\n\n/**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction mapCacheDelete(key) {\n var result = getMapData(this, key)['delete'](key);\n this.size -= result ? 1 : 0;\n return result;\n}\n\nexport default mapCacheDelete;\n","import getMapData from './_getMapData.js';\n\n/**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction mapCacheGet(key) {\n return getMapData(this, key).get(key);\n}\n\nexport default mapCacheGet;\n","import getMapData from './_getMapData.js';\n\n/**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction mapCacheHas(key) {\n return getMapData(this, key).has(key);\n}\n\nexport default mapCacheHas;\n","import getMapData from './_getMapData.js';\n\n/**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\nfunction mapCacheSet(key, value) {\n var data = getMapData(this, key),\n size = data.size;\n\n data.set(key, value);\n this.size += data.size == size ? 0 : 1;\n return this;\n}\n\nexport default mapCacheSet;\n","import ListCache from './_ListCache.js';\nimport stackClear from './_stackClear.js';\nimport stackDelete from './_stackDelete.js';\nimport stackGet from './_stackGet.js';\nimport stackHas from './_stackHas.js';\nimport stackSet from './_stackSet.js';\n\n/**\n * Creates a stack cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Stack(entries) {\n var data = this.__data__ = new ListCache(entries);\n this.size = data.size;\n}\n\n// Add methods to `Stack`.\nStack.prototype.clear = stackClear;\nStack.prototype['delete'] = stackDelete;\nStack.prototype.get = stackGet;\nStack.prototype.has = stackHas;\nStack.prototype.set = stackSet;\n\nexport default Stack;\n","import ListCache from './_ListCache.js';\n\n/**\n * Removes all key-value entries from the stack.\n *\n * @private\n * @name clear\n * @memberOf Stack\n */\nfunction stackClear() {\n this.__data__ = new ListCache;\n this.size = 0;\n}\n\nexport default stackClear;\n","/**\n * Removes `key` and its value from the stack.\n *\n * @private\n * @name delete\n * @memberOf Stack\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction stackDelete(key) {\n var data = this.__data__,\n result = data['delete'](key);\n\n this.size = data.size;\n return result;\n}\n\nexport default stackDelete;\n","/**\n * Gets the stack value for `key`.\n *\n * @private\n * @name get\n * @memberOf Stack\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction stackGet(key) {\n return this.__data__.get(key);\n}\n\nexport default stackGet;\n","/**\n * Checks if a stack value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Stack\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction stackHas(key) {\n return this.__data__.has(key);\n}\n\nexport default stackHas;\n","import ListCache from './_ListCache.js';\nimport Map from './_Map.js';\nimport MapCache from './_MapCache.js';\n\n/** Used as the size to enable large array optimizations. */\nvar LARGE_ARRAY_SIZE = 200;\n\n/**\n * Sets the stack `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Stack\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the stack cache instance.\n */\nfunction stackSet(key, value) {\n var data = this.__data__;\n if (data instanceof ListCache) {\n var pairs = data.__data__;\n if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n pairs.push([key, value]);\n this.size = ++data.size;\n return this;\n }\n data = this.__data__ = new MapCache(pairs);\n }\n data.set(key, value);\n this.size = data.size;\n return this;\n}\n\nexport default stackSet;\n","import getNative from './_getNative.js';\n\nvar defineProperty = (function() {\n try {\n var func = getNative(Object, 'defineProperty');\n func({}, '', {});\n return func;\n } catch (e) {}\n}());\n\nexport default defineProperty;\n","import defineProperty from './_defineProperty.js';\n\n/**\n * The base implementation of `assignValue` and `assignMergeValue` without\n * value checks.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction baseAssignValue(object, key, value) {\n if (key == '__proto__' && defineProperty) {\n defineProperty(object, key, {\n 'configurable': true,\n 'enumerable': true,\n 'value': value,\n 'writable': true\n });\n } else {\n object[key] = value;\n }\n}\n\nexport default baseAssignValue;\n","import baseAssignValue from './_baseAssignValue.js';\nimport eq from './eq.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Assigns `value` to `key` of `object` if the existing value is not equivalent\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction assignValue(object, key, value) {\n var objValue = object[key];\n if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||\n (value === undefined && !(key in object))) {\n baseAssignValue(object, key, value);\n }\n}\n\nexport default assignValue;\n","import assignValue from './_assignValue.js';\nimport baseAssignValue from './_baseAssignValue.js';\n\n/**\n * Copies properties of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy properties from.\n * @param {Array} props The property identifiers to copy.\n * @param {Object} [object={}] The object to copy properties to.\n * @param {Function} [customizer] The function to customize copied values.\n * @returns {Object} Returns `object`.\n */\nfunction copyObject(source, props, object, customizer) {\n var isNew = !object;\n object || (object = {});\n\n var index = -1,\n length = props.length;\n\n while (++index < length) {\n var key = props[index];\n\n var newValue = customizer\n ? customizer(object[key], source[key], key, object, source)\n : undefined;\n\n if (newValue === undefined) {\n newValue = source[key];\n }\n if (isNew) {\n baseAssignValue(object, key, newValue);\n } else {\n assignValue(object, key, newValue);\n }\n }\n return object;\n}\n\nexport default copyObject;\n","import baseGetTag from './_baseGetTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]';\n\n/**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\nfunction baseIsArguments(value) {\n return isObjectLike(value) && baseGetTag(value) == argsTag;\n}\n\nexport default baseIsArguments;\n","import baseIsArguments from './_baseIsArguments.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n * else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\nvar isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n !propertyIsEnumerable.call(value, 'callee');\n};\n\nexport default isArguments;\n","/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\nexport default isArray;\n","/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/** Used to detect unsigned integer values. */\nvar reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n/**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\nfunction isIndex(value, length) {\n var type = typeof value;\n length = length == null ? MAX_SAFE_INTEGER : length;\n\n return !!length &&\n (type == 'number' ||\n (type != 'symbol' && reIsUint.test(value))) &&\n (value > -1 && value % 1 == 0 && value < length);\n}\n\nexport default isIndex;\n","/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\nfunction isLength(value) {\n return typeof value == 'number' &&\n value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n}\n\nexport default isLength;\n","import baseGetTag from './_baseGetTag.js';\nimport isLength from './isLength.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values of typed arrays. */\nvar typedArrayTags = {};\ntypedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\ntypedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\ntypedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\ntypedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\ntypedArrayTags[uint32Tag] = true;\ntypedArrayTags[argsTag] = typedArrayTags[arrayTag] =\ntypedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\ntypedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\ntypedArrayTags[errorTag] = typedArrayTags[funcTag] =\ntypedArrayTags[mapTag] = typedArrayTags[numberTag] =\ntypedArrayTags[objectTag] = typedArrayTags[regexpTag] =\ntypedArrayTags[setTag] = typedArrayTags[stringTag] =\ntypedArrayTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\nfunction baseIsTypedArray(value) {\n return isObjectLike(value) &&\n isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n}\n\nexport default baseIsTypedArray;\n","/**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\nfunction baseUnary(func) {\n return function(value) {\n return func(value);\n };\n}\n\nexport default baseUnary;\n","import baseIsTypedArray from './_baseIsTypedArray.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n/**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\nvar isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\nexport default isTypedArray;\n","import baseTimes from './_baseTimes.js';\nimport isArguments from './isArguments.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isIndex from './_isIndex.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\nfunction arrayLikeKeys(value, inherited) {\n var isArr = isArray(value),\n isArg = !isArr && isArguments(value),\n isBuff = !isArr && !isArg && isBuffer(value),\n isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n skipIndexes = isArr || isArg || isBuff || isType,\n result = skipIndexes ? baseTimes(value.length, String) : [],\n length = result.length;\n\n for (var key in value) {\n if ((inherited || hasOwnProperty.call(value, key)) &&\n !(skipIndexes && (\n // Safari 9 has enumerable `arguments.length` in strict mode.\n key == 'length' ||\n // Node.js 0.10 has enumerable non-index properties on buffers.\n (isBuff && (key == 'offset' || key == 'parent')) ||\n // PhantomJS 2 has enumerable non-index properties on typed arrays.\n (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n // Skip index properties.\n isIndex(key, length)\n ))) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default arrayLikeKeys;\n","/**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\nfunction baseTimes(n, iteratee) {\n var index = -1,\n result = Array(n);\n\n while (++index < n) {\n result[index] = iteratee(index);\n }\n return result;\n}\n\nexport default baseTimes;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\nfunction isPrototype(value) {\n var Ctor = value && value.constructor,\n proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n return value === proto;\n}\n\nexport default isPrototype;\n","import overArg from './_overArg.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeKeys = overArg(Object.keys, Object);\n\nexport default nativeKeys;\n","import isPrototype from './_isPrototype.js';\nimport nativeKeys from './_nativeKeys.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeys(object) {\n if (!isPrototype(object)) {\n return nativeKeys(object);\n }\n var result = [];\n for (var key in Object(object)) {\n if (hasOwnProperty.call(object, key) && key != 'constructor') {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default baseKeys;\n","import isFunction from './isFunction.js';\nimport isLength from './isLength.js';\n\n/**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\nfunction isArrayLike(value) {\n return value != null && isLength(value.length) && !isFunction(value);\n}\n\nexport default isArrayLike;\n","import arrayLikeKeys from './_arrayLikeKeys.js';\nimport baseKeys from './_baseKeys.js';\nimport isArrayLike from './isArrayLike.js';\n\n/**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\nfunction keys(object) {\n return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n}\n\nexport default keys;\n","import isObject from './isObject.js';\nimport isPrototype from './_isPrototype.js';\nimport nativeKeysIn from './_nativeKeysIn.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeysIn(object) {\n if (!isObject(object)) {\n return nativeKeysIn(object);\n }\n var isProto = isPrototype(object),\n result = [];\n\n for (var key in object) {\n if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default baseKeysIn;\n","/**\n * This function is like\n * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * except that it includes inherited enumerable properties.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction nativeKeysIn(object) {\n var result = [];\n if (object != null) {\n for (var key in Object(object)) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default nativeKeysIn;\n","import arrayLikeKeys from './_arrayLikeKeys.js';\nimport baseKeysIn from './_baseKeysIn.js';\nimport isArrayLike from './isArrayLike.js';\n\n/**\n * Creates an array of the own and inherited enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keysIn(new Foo);\n * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n */\nfunction keysIn(object) {\n return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n}\n\nexport default keysIn;\n","/**\n * This method returns a new empty array.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {Array} Returns the new empty array.\n * @example\n *\n * var arrays = _.times(2, _.stubArray);\n *\n * console.log(arrays);\n * // => [[], []]\n *\n * console.log(arrays[0] === arrays[1]);\n * // => false\n */\nfunction stubArray() {\n return [];\n}\n\nexport default stubArray;\n","import arrayFilter from './_arrayFilter.js';\nimport stubArray from './stubArray.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n if (object == null) {\n return [];\n }\n object = Object(object);\n return arrayFilter(nativeGetSymbols(object), function(symbol) {\n return propertyIsEnumerable.call(object, symbol);\n });\n};\n\nexport default getSymbols;\n","/**\n * A specialized version of `_.filter` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\nfunction arrayFilter(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (predicate(value, index, array)) {\n result[resIndex++] = value;\n }\n }\n return result;\n}\n\nexport default arrayFilter;\n","/**\n * Appends the elements of `values` to `array`.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to append.\n * @returns {Array} Returns `array`.\n */\nfunction arrayPush(array, values) {\n var index = -1,\n length = values.length,\n offset = array.length;\n\n while (++index < length) {\n array[offset + index] = values[index];\n }\n return array;\n}\n\nexport default arrayPush;\n","import arrayPush from './_arrayPush.js';\nimport getPrototype from './_getPrototype.js';\nimport getSymbols from './_getSymbols.js';\nimport stubArray from './stubArray.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own and inherited enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {\n var result = [];\n while (object) {\n arrayPush(result, getSymbols(object));\n object = getPrototype(object);\n }\n return result;\n};\n\nexport default getSymbolsIn;\n","import arrayPush from './_arrayPush.js';\nimport isArray from './isArray.js';\n\n/**\n * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @param {Function} symbolsFunc The function to get the symbols of `object`.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction baseGetAllKeys(object, keysFunc, symbolsFunc) {\n var result = keysFunc(object);\n return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n}\n\nexport default baseGetAllKeys;\n","import baseGetAllKeys from './_baseGetAllKeys.js';\nimport getSymbols from './_getSymbols.js';\nimport keys from './keys.js';\n\n/**\n * Creates an array of own enumerable property names and symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeys(object) {\n return baseGetAllKeys(object, keys, getSymbols);\n}\n\nexport default getAllKeys;\n","import baseGetAllKeys from './_baseGetAllKeys.js';\nimport getSymbolsIn from './_getSymbolsIn.js';\nimport keysIn from './keysIn.js';\n\n/**\n * Creates an array of own and inherited enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeysIn(object) {\n return baseGetAllKeys(object, keysIn, getSymbolsIn);\n}\n\nexport default getAllKeysIn;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar DataView = getNative(root, 'DataView');\n\nexport default DataView;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Promise = getNative(root, 'Promise');\n\nexport default Promise;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Set = getNative(root, 'Set');\n\nexport default Set;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar WeakMap = getNative(root, 'WeakMap');\n\nexport default WeakMap;\n","import DataView from './_DataView.js';\nimport Map from './_Map.js';\nimport Promise from './_Promise.js';\nimport Set from './_Set.js';\nimport WeakMap from './_WeakMap.js';\nimport baseGetTag from './_baseGetTag.js';\nimport toSource from './_toSource.js';\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]',\n objectTag = '[object Object]',\n promiseTag = '[object Promise]',\n setTag = '[object Set]',\n weakMapTag = '[object WeakMap]';\n\nvar dataViewTag = '[object DataView]';\n\n/** Used to detect maps, sets, and weakmaps. */\nvar dataViewCtorString = toSource(DataView),\n mapCtorString = toSource(Map),\n promiseCtorString = toSource(Promise),\n setCtorString = toSource(Set),\n weakMapCtorString = toSource(WeakMap);\n\n/**\n * Gets the `toStringTag` of `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nvar getTag = baseGetTag;\n\n// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\nif ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n (Map && getTag(new Map) != mapTag) ||\n (Promise && getTag(Promise.resolve()) != promiseTag) ||\n (Set && getTag(new Set) != setTag) ||\n (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n getTag = function(value) {\n var result = baseGetTag(value),\n Ctor = result == objectTag ? value.constructor : undefined,\n ctorString = Ctor ? toSource(Ctor) : '';\n\n if (ctorString) {\n switch (ctorString) {\n case dataViewCtorString: return dataViewTag;\n case mapCtorString: return mapTag;\n case promiseCtorString: return promiseTag;\n case setCtorString: return setTag;\n case weakMapCtorString: return weakMapTag;\n }\n }\n return result;\n };\n}\n\nexport default getTag;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Initializes an array clone.\n *\n * @private\n * @param {Array} array The array to clone.\n * @returns {Array} Returns the initialized clone.\n */\nfunction initCloneArray(array) {\n var length = array.length,\n result = new array.constructor(length);\n\n // Add properties assigned by `RegExp#exec`.\n if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {\n result.index = array.index;\n result.input = array.input;\n }\n return result;\n}\n\nexport default initCloneArray;\n","import root from './_root.js';\n\n/** Built-in value references. */\nvar Uint8Array = root.Uint8Array;\n\nexport default Uint8Array;\n","import Uint8Array from './_Uint8Array.js';\n\n/**\n * Creates a clone of `arrayBuffer`.\n *\n * @private\n * @param {ArrayBuffer} arrayBuffer The array buffer to clone.\n * @returns {ArrayBuffer} Returns the cloned array buffer.\n */\nfunction cloneArrayBuffer(arrayBuffer) {\n var result = new arrayBuffer.constructor(arrayBuffer.byteLength);\n new Uint8Array(result).set(new Uint8Array(arrayBuffer));\n return result;\n}\n\nexport default cloneArrayBuffer;\n","/** Used to match `RegExp` flags from their coerced string values. */\nvar reFlags = /\\w*$/;\n\n/**\n * Creates a clone of `regexp`.\n *\n * @private\n * @param {Object} regexp The regexp to clone.\n * @returns {Object} Returns the cloned regexp.\n */\nfunction cloneRegExp(regexp) {\n var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));\n result.lastIndex = regexp.lastIndex;\n return result;\n}\n\nexport default cloneRegExp;\n","import Symbol from './_Symbol.js';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * Creates a clone of the `symbol` object.\n *\n * @private\n * @param {Object} symbol The symbol object to clone.\n * @returns {Object} Returns the cloned symbol object.\n */\nfunction cloneSymbol(symbol) {\n return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};\n}\n\nexport default cloneSymbol;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\nimport cloneDataView from './_cloneDataView.js';\nimport cloneRegExp from './_cloneRegExp.js';\nimport cloneSymbol from './_cloneSymbol.js';\nimport cloneTypedArray from './_cloneTypedArray.js';\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/**\n * Initializes an object clone based on its `toStringTag`.\n *\n * **Note:** This function only supports cloning values with tags of\n * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.\n *\n * @private\n * @param {Object} object The object to clone.\n * @param {string} tag The `toStringTag` of the object to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneByTag(object, tag, isDeep) {\n var Ctor = object.constructor;\n switch (tag) {\n case arrayBufferTag:\n return cloneArrayBuffer(object);\n\n case boolTag:\n case dateTag:\n return new Ctor(+object);\n\n case dataViewTag:\n return cloneDataView(object, isDeep);\n\n case float32Tag: case float64Tag:\n case int8Tag: case int16Tag: case int32Tag:\n case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:\n return cloneTypedArray(object, isDeep);\n\n case mapTag:\n return new Ctor;\n\n case numberTag:\n case stringTag:\n return new Ctor(object);\n\n case regexpTag:\n return cloneRegExp(object);\n\n case setTag:\n return new Ctor;\n\n case symbolTag:\n return cloneSymbol(object);\n }\n}\n\nexport default initCloneByTag;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\n\n/**\n * Creates a clone of `dataView`.\n *\n * @private\n * @param {Object} dataView The data view to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned data view.\n */\nfunction cloneDataView(dataView, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;\n return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);\n}\n\nexport default cloneDataView;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\n\n/**\n * Creates a clone of `typedArray`.\n *\n * @private\n * @param {Object} typedArray The typed array to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned typed array.\n */\nfunction cloneTypedArray(typedArray, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;\n return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);\n}\n\nexport default cloneTypedArray;\n","import isObject from './isObject.js';\n\n/** Built-in value references. */\nvar objectCreate = Object.create;\n\n/**\n * The base implementation of `_.create` without support for assigning\n * properties to the created object.\n *\n * @private\n * @param {Object} proto The object to inherit from.\n * @returns {Object} Returns the new object.\n */\nvar baseCreate = (function() {\n function object() {}\n return function(proto) {\n if (!isObject(proto)) {\n return {};\n }\n if (objectCreate) {\n return objectCreate(proto);\n }\n object.prototype = proto;\n var result = new object;\n object.prototype = undefined;\n return result;\n };\n}());\n\nexport default baseCreate;\n","import baseIsMap from './_baseIsMap.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsMap = nodeUtil && nodeUtil.isMap;\n\n/**\n * Checks if `value` is classified as a `Map` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n * @example\n *\n * _.isMap(new Map);\n * // => true\n *\n * _.isMap(new WeakMap);\n * // => false\n */\nvar isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\nexport default isMap;\n","import getTag from './_getTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]';\n\n/**\n * The base implementation of `_.isMap` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n */\nfunction baseIsMap(value) {\n return isObjectLike(value) && getTag(value) == mapTag;\n}\n\nexport default baseIsMap;\n","import baseIsSet from './_baseIsSet.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsSet = nodeUtil && nodeUtil.isSet;\n\n/**\n * Checks if `value` is classified as a `Set` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n * @example\n *\n * _.isSet(new Set);\n * // => true\n *\n * _.isSet(new WeakSet);\n * // => false\n */\nvar isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\nexport default isSet;\n","import getTag from './_getTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar setTag = '[object Set]';\n\n/**\n * The base implementation of `_.isSet` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n */\nfunction baseIsSet(value) {\n return isObjectLike(value) && getTag(value) == setTag;\n}\n\nexport default baseIsSet;\n","import Stack from './_Stack.js';\nimport arrayEach from './_arrayEach.js';\nimport assignValue from './_assignValue.js';\nimport baseAssign from './_baseAssign.js';\nimport baseAssignIn from './_baseAssignIn.js';\nimport cloneBuffer from './_cloneBuffer.js';\nimport copyArray from './_copyArray.js';\nimport copySymbols from './_copySymbols.js';\nimport copySymbolsIn from './_copySymbolsIn.js';\nimport getAllKeys from './_getAllKeys.js';\nimport getAllKeysIn from './_getAllKeysIn.js';\nimport getTag from './_getTag.js';\nimport initCloneArray from './_initCloneArray.js';\nimport initCloneByTag from './_initCloneByTag.js';\nimport initCloneObject from './_initCloneObject.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isMap from './isMap.js';\nimport isObject from './isObject.js';\nimport isSet from './isSet.js';\nimport keys from './keys.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_FLAT_FLAG = 2,\n CLONE_SYMBOLS_FLAG = 4;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values supported by `_.clone`. */\nvar cloneableTags = {};\ncloneableTags[argsTag] = cloneableTags[arrayTag] =\ncloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =\ncloneableTags[boolTag] = cloneableTags[dateTag] =\ncloneableTags[float32Tag] = cloneableTags[float64Tag] =\ncloneableTags[int8Tag] = cloneableTags[int16Tag] =\ncloneableTags[int32Tag] = cloneableTags[mapTag] =\ncloneableTags[numberTag] = cloneableTags[objectTag] =\ncloneableTags[regexpTag] = cloneableTags[setTag] =\ncloneableTags[stringTag] = cloneableTags[symbolTag] =\ncloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =\ncloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;\ncloneableTags[errorTag] = cloneableTags[funcTag] =\ncloneableTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.clone` and `_.cloneDeep` which tracks\n * traversed objects.\n *\n * @private\n * @param {*} value The value to clone.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Deep clone\n * 2 - Flatten inherited properties\n * 4 - Clone symbols\n * @param {Function} [customizer] The function to customize cloning.\n * @param {string} [key] The key of `value`.\n * @param {Object} [object] The parent object of `value`.\n * @param {Object} [stack] Tracks traversed objects and their clone counterparts.\n * @returns {*} Returns the cloned value.\n */\nfunction baseClone(value, bitmask, customizer, key, object, stack) {\n var result,\n isDeep = bitmask & CLONE_DEEP_FLAG,\n isFlat = bitmask & CLONE_FLAT_FLAG,\n isFull = bitmask & CLONE_SYMBOLS_FLAG;\n\n if (customizer) {\n result = object ? customizer(value, key, object, stack) : customizer(value);\n }\n if (result !== undefined) {\n return result;\n }\n if (!isObject(value)) {\n return value;\n }\n var isArr = isArray(value);\n if (isArr) {\n result = initCloneArray(value);\n if (!isDeep) {\n return copyArray(value, result);\n }\n } else {\n var tag = getTag(value),\n isFunc = tag == funcTag || tag == genTag;\n\n if (isBuffer(value)) {\n return cloneBuffer(value, isDeep);\n }\n if (tag == objectTag || tag == argsTag || (isFunc && !object)) {\n result = (isFlat || isFunc) ? {} : initCloneObject(value);\n if (!isDeep) {\n return isFlat\n ? copySymbolsIn(value, baseAssignIn(result, value))\n : copySymbols(value, baseAssign(result, value));\n }\n } else {\n if (!cloneableTags[tag]) {\n return object ? value : {};\n }\n result = initCloneByTag(value, tag, isDeep);\n }\n }\n // Check for circular references and return its corresponding clone.\n stack || (stack = new Stack);\n var stacked = stack.get(value);\n if (stacked) {\n return stacked;\n }\n stack.set(value, result);\n\n if (isSet(value)) {\n value.forEach(function(subValue) {\n result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));\n });\n } else if (isMap(value)) {\n value.forEach(function(subValue, key) {\n result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n }\n\n var keysFunc = isFull\n ? (isFlat ? getAllKeysIn : getAllKeys)\n : (isFlat ? keysIn : keys);\n\n var props = isArr ? undefined : keysFunc(value);\n arrayEach(props || value, function(subValue, key) {\n if (props) {\n key = subValue;\n subValue = value[key];\n }\n // Recursively populate clone (susceptible to call stack limits).\n assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n return result;\n}\n\nexport default baseClone;\n","/**\n * Copies the values of `source` to `array`.\n *\n * @private\n * @param {Array} source The array to copy values from.\n * @param {Array} [array=[]] The array to copy values to.\n * @returns {Array} Returns `array`.\n */\nfunction copyArray(source, array) {\n var index = -1,\n length = source.length;\n\n array || (array = Array(length));\n while (++index < length) {\n array[index] = source[index];\n }\n return array;\n}\n\nexport default copyArray;\n","import baseCreate from './_baseCreate.js';\nimport getPrototype from './_getPrototype.js';\nimport isPrototype from './_isPrototype.js';\n\n/**\n * Initializes an object clone.\n *\n * @private\n * @param {Object} object The object to clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneObject(object) {\n return (typeof object.constructor == 'function' && !isPrototype(object))\n ? baseCreate(getPrototype(object))\n : {};\n}\n\nexport default initCloneObject;\n","import copyObject from './_copyObject.js';\nimport getSymbolsIn from './_getSymbolsIn.js';\n\n/**\n * Copies own and inherited symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbolsIn(source, object) {\n return copyObject(source, getSymbolsIn(source), object);\n}\n\nexport default copySymbolsIn;\n","import copyObject from './_copyObject.js';\nimport keysIn from './keysIn.js';\n\n/**\n * The base implementation of `_.assignIn` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssignIn(object, source) {\n return object && copyObject(source, keysIn(source), object);\n}\n\nexport default baseAssignIn;\n","import copyObject from './_copyObject.js';\nimport getSymbols from './_getSymbols.js';\n\n/**\n * Copies own symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbols(source, object) {\n return copyObject(source, getSymbols(source), object);\n}\n\nexport default copySymbols;\n","import copyObject from './_copyObject.js';\nimport keys from './keys.js';\n\n/**\n * The base implementation of `_.assign` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssign(object, source) {\n return object && copyObject(source, keys(source), object);\n}\n\nexport default baseAssign;\n","/**\n * A specialized version of `_.forEach` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\nfunction arrayEach(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (iteratee(array[index], index, array) === false) {\n break;\n }\n }\n return array;\n}\n\nexport default arrayEach;\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * This method is like `_.cloneWith` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the deep cloned value.\n * @see _.cloneWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(true);\n * }\n * }\n *\n * var el = _.cloneDeepWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 20\n */\nfunction cloneDeepWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);\n}\n\nexport default cloneDeepWith;\n","import isObjectLike from './isObjectLike.js';\nimport isPlainObject from './isPlainObject.js';\n\n/**\n * Checks if `value` is likely a DOM element.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.\n * @example\n *\n * _.isElement(document.body);\n * // => true\n *\n * _.isElement('<body>');\n * // => false\n */\nfunction isElement(value) {\n return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);\n}\n\nexport default isElement;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/config\n */\n\nimport { isPlainObject, isElement, cloneDeepWith } from 'lodash-es';\n\n/**\n * Handles a configuration dictionary.\n */\nexport default class Config {\n\t/**\n\t * Creates an instance of the {@link ~Config} class.\n\t *\n\t * @param {Object} [configurations] The initial configurations to be set. Usually, provided by the user.\n\t * @param {Object} [defaultConfigurations] The default configurations. Usually, provided by the system.\n\t */\n\tconstructor( configurations, defaultConfigurations ) {\n\t\t/**\n\t\t * Store for the whole configuration.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {};\n\n\t\t// Set default configuration.\n\t\tif ( defaultConfigurations ) {\n\t\t\tthis.define( defaultConfigurations );\n\t\t}\n\n\t\t// Set initial configuration.\n\t\tif ( configurations ) {\n\t\t\tthis._setObjectToTarget( this._config, configurations );\n\t\t}\n\t}\n\n\t/**\n\t * Set configuration values.\n\t *\n\t * It accepts both a name/value pair or an object, which properties and values will be used to set\n\t * configurations.\n\t *\n\t * It also accepts setting a \"deep configuration\" by using dots in the name. For example, `'resize.width'` sets\n\t * the value for the `width` configuration in the `resize` subset.\n\t *\n\t *\t\tconfig.set( 'width', 500 );\n\t *\t\tconfig.set( 'toolbar.collapsed', true );\n\t *\n\t *\t\t// Equivalent to:\n\t *\t\tconfig.set( {\n\t *\t\t\twidth: 500\n\t *\t\t\ttoolbar: {\n\t *\t\t\t\tcollapsed: true\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Passing an object as the value will amend the configuration, not replace it.\n\t *\n\t *\t\tconfig.set( 'toolbar', {\n\t *\t\t\tcollapsed: true,\n\t *\t\t} );\n\t *\n\t *\t\tconfig.set( 'toolbar', {\n\t *\t\t\tcolor: 'red',\n\t *\t\t} );\n\t *\n\t *\t\tconfig.get( 'toolbar.collapsed' ); // true\n\t *\t\tconfig.get( 'toolbar.color' ); // 'red'\n\t *\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t */\n\tset( name, value ) {\n\t\tthis._setToTarget( this._config, name, value );\n\t}\n\n\t/**\n\t * Does exactly the same as {@link #set} with one exception – passed configuration extends\n\t * existing one, but does not overwrite already defined values.\n\t *\n\t * This method is supposed to be called by plugin developers to setup plugin's configurations. It would be\n\t * rarely used for other needs.\n\t *\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t */\n\tdefine( name, value ) {\n\t\tconst isDefine = true;\n\n\t\tthis._setToTarget( this._config, name, value, isDefine );\n\t}\n\n\t/**\n\t * Gets the value for a configuration entry.\n\t *\n\t *\t\tconfig.get( 'name' );\n\t *\n\t * Deep configurations can be retrieved by separating each part with a dot.\n\t *\n\t *\t\tconfig.get( 'toolbar.collapsed' );\n\t *\n\t * @param {String} name The configuration name. Configuration names are case-sensitive.\n\t * @returns {*} The configuration value or `undefined` if the configuration entry was not found.\n\t */\n\tget( name ) {\n\t\treturn this._getFromSource( this._config, name );\n\t}\n\n\t/**\n\t * Saves passed configuration to the specified target (nested object).\n\t *\n\t * @private\n\t * @param {Object} target Nested config object.\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t * @param {Boolean} [isDefine=false] Define if passed configuration should overwrite existing one.\n\t */\n\t_setToTarget( target, name, value, isDefine = false ) {\n\t\t// In case of an object, iterate through it and call `_setToTarget` again for each property.\n\t\tif ( isPlainObject( name ) ) {\n\t\t\tthis._setObjectToTarget( target, name, isDefine );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// The configuration name should be split into parts if it has dots. E.g. `resize.width` -> [`resize`, `width`].\n\t\tconst parts = name.split( '.' );\n\n\t\t// Take the name of the configuration out of the parts. E.g. `resize.width` -> `width`.\n\t\tname = parts.pop();\n\n\t\t// Iterate over parts to check if currently stored configuration has proper structure.\n\t\tfor ( const part of parts ) {\n\t\t\t// If there is no object for specified part then create one.\n\t\t\tif ( !isPlainObject( target[ part ] ) ) {\n\t\t\t\ttarget[ part ] = {};\n\t\t\t}\n\n\t\t\t// Nested object becomes a target.\n\t\t\ttarget = target[ part ];\n\t\t}\n\n\t\t// In case of value is an object.\n\t\tif ( isPlainObject( value ) ) {\n\t\t\t// We take care of proper config structure.\n\t\t\tif ( !isPlainObject( target[ name ] ) ) {\n\t\t\t\ttarget[ name ] = {};\n\t\t\t}\n\n\t\t\ttarget = target[ name ];\n\n\t\t\t// And iterate through this object calling `_setToTarget` again for each property.\n\t\t\tthis._setObjectToTarget( target, value, isDefine );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Do nothing if we are defining configuration for non empty name.\n\t\tif ( isDefine && typeof target[ name ] != 'undefined' ) {\n\t\t\treturn;\n\t\t}\n\n\t\ttarget[ name ] = value;\n\t}\n\n\t/**\n\t * Get specified configuration from specified source (nested object).\n\t *\n\t * @private\n\t * @param {Object} source level of nested object.\n\t * @param {String} name The configuration name. Configuration names are case-sensitive.\n\t * @returns {*} The configuration value or `undefined` if the configuration entry was not found.\n\t */\n\t_getFromSource( source, name ) {\n\t\t// The configuration name should be split into parts if it has dots. E.g. `resize.width` -> [`resize`, `width`].\n\t\tconst parts = name.split( '.' );\n\n\t\t// Take the name of the configuration out of the parts. E.g. `resize.width` -> `width`.\n\t\tname = parts.pop();\n\n\t\t// Iterate over parts to check if currently stored configuration has proper structure.\n\t\tfor ( const part of parts ) {\n\t\t\tif ( !isPlainObject( source[ part ] ) ) {\n\t\t\t\tsource = null;\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Nested object becomes a source.\n\t\t\tsource = source[ part ];\n\t\t}\n\n\t\t// Always returns undefined for non existing configuration.\n\t\treturn source ? cloneConfig( source[ name ] ) : undefined;\n\t}\n\n\t/**\n\t * Iterates through passed object and calls {@link #_setToTarget} method with object key and value for each property.\n\t *\n\t * @private\n\t * @param {Object} target Nested config object.\n\t * @param {Object} configuration Configuration data set\n\t * @param {Boolean} [isDefine] Defines if passed configuration is default configuration or not.\n\t */\n\t_setObjectToTarget( target, configuration, isDefine ) {\n\t\tObject.keys( configuration ).forEach( key => {\n\t\t\tthis._setToTarget( target, key, configuration[ key ], isDefine );\n\t\t} );\n\t}\n}\n\n// Clones configuration object or value.\n// @param {*} source Source configuration\n// @returns {*} Cloned configuration value.\nfunction cloneConfig( source ) {\n\treturn cloneDeepWith( source, leaveDOMReferences );\n}\n\n// A customizer function for cloneDeepWith.\n// It will leave references to DOM Elements instead of cloning them.\n//\n// @param {*} value\n// @returns {Element|undefined}\nfunction leaveDOMReferences( value ) {\n\treturn isElement( value ) ? value : undefined;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/eventinfo\n */\n\nimport spy from './spy';\n\n/**\n * The event object passed to event callbacks. It is used to provide information about the event as well as a tool to\n * manipulate it.\n */\nexport default class EventInfo {\n\t/**\n\t * @param {Object} source The emitter.\n\t * @param {String} name The event name.\n\t */\n\tconstructor( source, name ) {\n\t\t/**\n\t\t * The object that fired the event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object}\n\t\t */\n\t\tthis.source = source;\n\n\t\t/**\n\t\t * The event name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Path this event has followed. See {@link module:utils/emittermixin~EmitterMixin#delegate}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<Object>}\n\t\t */\n\t\tthis.path = [];\n\n\t\t// The following methods are defined in the constructor because they must be re-created per instance.\n\n\t\t/**\n\t\t * Stops the event emitter to call further callbacks for this event interaction.\n\t\t *\n\t\t * @method #stop\n\t\t */\n\t\tthis.stop = spy();\n\n\t\t/**\n\t\t * Removes the current callback from future interactions of this event.\n\t\t *\n\t\t * @method #off\n\t\t */\n\t\tthis.off = spy();\n\n\t\t/**\n\t\t * The value which will be returned by {@link module:utils/emittermixin~EmitterMixin#fire}.\n\t\t *\n\t\t * It's `undefined` by default and can be changed by an event listener:\n\t\t *\n\t\t *\t\tdataController.fire( 'getSelectedContent', ( evt ) => {\n\t\t *\t\t\t// This listener will make `dataController.fire( 'getSelectedContent' )`\n\t\t *\t\t\t// always return an empty DocumentFragment.\n\t\t *\t\t\tevt.return = new DocumentFragment();\n\t\t *\n\t\t *\t\t\t// Make sure no other listeners are executed.\n\t\t *\t\t\tevt.stop();\n\t\t *\t\t} );\n\t\t *\n\t\t * @member #return\n\t\t */\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/spy\n */\n\n/**\n * Creates a spy function (ala Sinon.js) that can be used to inspect call to it.\n *\n * The following are the present features:\n *\n * * spy.called: property set to `true` if the function has been called at least once.\n *\n * @returns {Function} The spy function.\n */\nfunction spy() {\n\treturn function spy() {\n\t\tspy.called = true;\n\t};\n}\n\nexport default spy;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/uid\n */\n\n/**\n * Returns a unique id. This id consist of an 'e' character and a randomly generated string of 32 aphanumeric characters.\n * Each character in uid string represents a hexadecimal digit (base 16).\n *\n * @returns {String} A hexadecimal number representing the id.\n */\nexport default function uid() {\n\tlet uuid = 'e'; // Make sure that id does not start with number.\n\n\tfor ( let i = 0; i < 8; i++ ) {\n\t\tuuid += Math.floor( ( 1 + Math.random() ) * 0x10000 ).toString( 16 ).substring( 1 );\n\t}\n\n\treturn uuid;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/priorities\n */\n\n/**\n * String representing a priority value.\n *\n * @typedef {'highest'|'high'|'normal'|'low'|'lowest'} module:utils/priorities~PriorityString\n */\n\n/**\n * Provides group of constants to use instead of hardcoding numeric priority values.\n *\n * @namespace\n */\nconst priorities = {\n\t/**\n\t * Converts a string with priority name to it's numeric value. If `Number` is given, it just returns it.\n\t *\n\t * @static\n\t * @param {module:utils/priorities~PriorityString|Number} priority Priority to convert.\n\t * @returns {Number} Converted priority.\n\t */\n\tget( priority ) {\n\t\tif ( typeof priority != 'number' ) {\n\t\t\treturn this[ priority ] || this.normal;\n\t\t} else {\n\t\t\treturn priority;\n\t\t}\n\t},\n\n\thighest: 100000,\n\thigh: 1000,\n\tnormal: 0,\n\tlow: -1000,\n\tlowest: -100000\n};\n\nexport default priorities;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/emittermixin\n */\n\nimport EventInfo from './eventinfo';\nimport uid from './uid';\nimport priorities from './priorities';\n\n// To check if component is loaded more than once.\nimport './version';\nimport CKEditorError from './ckeditorerror';\n\nconst _listeningTo = Symbol( 'listeningTo' );\nconst _emitterId = Symbol( 'emitterId' );\n\n/**\n * Mixin that injects the {@link ~Emitter events API} into its host.\n *\n * @mixin EmitterMixin\n * @implements module:utils/emittermixin~Emitter\n */\nconst EmitterMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\ton( event, callback, options = {} ) {\n\t\tthis.listenTo( this, event, callback, options );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tonce( event, callback, options ) {\n\t\tlet wasFired = false;\n\n\t\tconst onceCallback = function( event, ...args ) {\n\t\t\t// Ensure the callback is called only once even if the callback itself leads to re-firing the event\n\t\t\t// (which would call the callback again).\n\t\t\tif ( !wasFired ) {\n\t\t\t\twasFired = true;\n\n\t\t\t\t// Go off() at the first call.\n\t\t\t\tevent.off();\n\n\t\t\t\t// Go with the original callback.\n\t\t\t\tcallback.call( this, event, ...args );\n\t\t\t}\n\t\t};\n\n\t\t// Make a similar on() call, simply replacing the callback.\n\t\tthis.listenTo( this, event, onceCallback, options );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\toff( event, callback ) {\n\t\tthis.stopListening( this, event, callback );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tlistenTo( emitter, event, callback, options = {} ) {\n\t\tlet emitterInfo, eventCallbacks;\n\n\t\t// _listeningTo contains a list of emitters that this object is listening to.\n\t\t// This list has the following format:\n\t\t//\n\t\t// _listeningTo: {\n\t\t// emitterId: {\n\t\t// emitter: emitter,\n\t\t// callbacks: {\n\t\t// event1: [ callback1, callback2, ... ]\n\t\t// ....\n\t\t// }\n\t\t// },\n\t\t// ...\n\t\t// }\n\n\t\tif ( !this[ _listeningTo ] ) {\n\t\t\tthis[ _listeningTo ] = {};\n\t\t}\n\n\t\tconst emitters = this[ _listeningTo ];\n\n\t\tif ( !_getEmitterId( emitter ) ) {\n\t\t\t_setEmitterId( emitter );\n\t\t}\n\n\t\tconst emitterId = _getEmitterId( emitter );\n\n\t\tif ( !( emitterInfo = emitters[ emitterId ] ) ) {\n\t\t\temitterInfo = emitters[ emitterId ] = {\n\t\t\t\temitter,\n\t\t\t\tcallbacks: {}\n\t\t\t};\n\t\t}\n\n\t\tif ( !( eventCallbacks = emitterInfo.callbacks[ event ] ) ) {\n\t\t\teventCallbacks = emitterInfo.callbacks[ event ] = [];\n\t\t}\n\n\t\teventCallbacks.push( callback );\n\n\t\t// Finally register the callback to the event.\n\t\tcreateEventNamespace( emitter, event );\n\t\tconst lists = getCallbacksListsForNamespace( emitter, event );\n\t\tconst priority = priorities.get( options.priority );\n\n\t\tconst callbackDefinition = {\n\t\t\tcallback,\n\t\t\tpriority\n\t\t};\n\n\t\t// Add the callback to all callbacks list.\n\t\tfor ( const callbacks of lists ) {\n\t\t\t// Add the callback to the list in the right priority position.\n\t\t\tlet added = false;\n\n\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\tif ( callbacks[ i ].priority < priority ) {\n\t\t\t\t\tcallbacks.splice( i, 0, callbackDefinition );\n\t\t\t\t\tadded = true;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add at the end, if right place was not found.\n\t\t\tif ( !added ) {\n\t\t\t\tcallbacks.push( callbackDefinition );\n\t\t\t}\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\tconst emitters = this[ _listeningTo ];\n\t\tlet emitterId = emitter && _getEmitterId( emitter );\n\t\tconst emitterInfo = emitters && emitterId && emitters[ emitterId ];\n\t\tconst eventCallbacks = emitterInfo && event && emitterInfo.callbacks[ event ];\n\n\t\t// Stop if nothing has been listened.\n\t\tif ( !emitters || ( emitter && !emitterInfo ) || ( event && !eventCallbacks ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// All params provided. off() that single callback.\n\t\tif ( callback ) {\n\t\t\tremoveCallback( emitter, event, callback );\n\t\t}\n\t\t// Only `emitter` and `event` provided. off() all callbacks for that event.\n\t\telse if ( eventCallbacks ) {\n\t\t\twhile ( ( callback = eventCallbacks.pop() ) ) {\n\t\t\t\tremoveCallback( emitter, event, callback );\n\t\t\t}\n\n\t\t\tdelete emitterInfo.callbacks[ event ];\n\t\t}\n\t\t// Only `emitter` provided. off() all events for that emitter.\n\t\telse if ( emitterInfo ) {\n\t\t\tfor ( event in emitterInfo.callbacks ) {\n\t\t\t\tthis.stopListening( emitter, event );\n\t\t\t}\n\t\t\tdelete emitters[ emitterId ];\n\t\t}\n\t\t// No params provided. off() all emitters.\n\t\telse {\n\t\t\tfor ( emitterId in emitters ) {\n\t\t\t\tthis.stopListening( emitters[ emitterId ].emitter );\n\t\t\t}\n\t\t\tdelete this[ _listeningTo ];\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfire( eventOrInfo, ...args ) {\n\t\ttry {\n\t\t\tconst eventInfo = eventOrInfo instanceof EventInfo ? eventOrInfo : new EventInfo( this, eventOrInfo );\n\t\t\tconst event = eventInfo.name;\n\t\t\tlet callbacks = getCallbacksForEvent( this, event );\n\n\t\t\t// Record that the event passed this emitter on its path.\n\t\t\teventInfo.path.push( this );\n\n\t\t\t// Handle event listener callbacks first.\n\t\t\tif ( callbacks ) {\n\t\t\t\t// Arguments passed to each callback.\n\t\t\t\tconst callbackArgs = [ eventInfo, ...args ];\n\n\t\t\t\t// Copying callbacks array is the easiest and most secure way of preventing infinite loops, when event callbacks\n\t\t\t\t// are added while processing other callbacks. Previous solution involved adding counters (unique ids) but\n\t\t\t\t// failed if callbacks were added to the queue before currently processed callback.\n\t\t\t\t// If this proves to be too inefficient, another method is to change `.on()` so callbacks are stored if same\n\t\t\t\t// event is currently processed. Then, `.fire()` at the end, would have to add all stored events.\n\t\t\t\tcallbacks = Array.from( callbacks );\n\n\t\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\t\tcallbacks[ i ].callback.apply( this, callbackArgs );\n\n\t\t\t\t\t// Remove the callback from future requests if off() has been called.\n\t\t\t\t\tif ( eventInfo.off.called ) {\n\t\t\t\t\t\t// Remove the called mark for the next calls.\n\t\t\t\t\t\tdelete eventInfo.off.called;\n\n\t\t\t\t\t\tremoveCallback( this, event, callbacks[ i ].callback );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Do not execute next callbacks if stop() was called.\n\t\t\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Delegate event to other emitters if needed.\n\t\t\tif ( this._delegations ) {\n\t\t\t\tconst destinations = this._delegations.get( event );\n\t\t\t\tconst passAllDestinations = this._delegations.get( '*' );\n\n\t\t\t\tif ( destinations ) {\n\t\t\t\t\tfireDelegatedEvents( destinations, eventInfo, args );\n\t\t\t\t}\n\n\t\t\t\tif ( passAllDestinations ) {\n\t\t\t\t\tfireDelegatedEvents( passAllDestinations, eventInfo, args );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn eventInfo.return;\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdelegate( ...events ) {\n\t\treturn {\n\t\t\tto: ( emitter, nameOrFunction ) => {\n\t\t\t\tif ( !this._delegations ) {\n\t\t\t\t\tthis._delegations = new Map();\n\t\t\t\t}\n\n\t\t\t\t// Originally there was a for..of loop which unfortunately caused an error in Babel that didn't allow\n\t\t\t\t// build an application. See: https://github.com/ckeditor/ckeditor5-react/issues/40.\n\t\t\t\tevents.forEach( eventName => {\n\t\t\t\t\tconst destinations = this._delegations.get( eventName );\n\n\t\t\t\t\tif ( !destinations ) {\n\t\t\t\t\t\tthis._delegations.set( eventName, new Map( [ [ emitter, nameOrFunction ] ] ) );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tdestinations.set( emitter, nameOrFunction );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstopDelegating( event, emitter ) {\n\t\tif ( !this._delegations ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !event ) {\n\t\t\tthis._delegations.clear();\n\t\t} else if ( !emitter ) {\n\t\t\tthis._delegations.delete( event );\n\t\t} else {\n\t\t\tconst destinations = this._delegations.get( event );\n\n\t\t\tif ( destinations ) {\n\t\t\t\tdestinations.delete( emitter );\n\t\t\t}\n\t\t}\n\t}\n};\n\nexport default EmitterMixin;\n\n/**\n * Emitter/listener interface.\n *\n * Can be easily implemented by a class by mixing the {@link module:utils/emittermixin~EmitterMixin} mixin.\n *\n * @interface Emitter\n */\n\n/**\n * Registers a callback function to be executed when an event is fired.\n *\n * Shorthand for {@link #listenTo `this.listenTo( this, event, callback, options )`} (it makes the emitter\n * listen on itself).\n *\n * @method #on\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Registers a callback function to be executed on the next time the event is fired only. This is similar to\n * calling {@link #on} followed by {@link #off} in the callback.\n *\n * @method #once\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Stops executing the callback on the given event.\n * Shorthand for {@link #stopListening `this.stopListening( this, event, callback )`}.\n *\n * @method #off\n * @param {String} event The name of the event.\n * @param {Function} callback The function to stop being called.\n */\n\n/**\n * Registers a callback function to be executed when an event is fired in a specific (emitter) object.\n *\n * Events can be grouped in namespaces using `:`.\n * When namespaced event is fired, it additionally fires all callbacks for that namespace.\n *\n *\t\t// myEmitter.on( ... ) is a shorthand for myEmitter.listenTo( myEmitter, ... ).\n *\t\tmyEmitter.on( 'myGroup', genericCallback );\n *\t\tmyEmitter.on( 'myGroup:myEvent', specificCallback );\n *\n *\t\t// genericCallback is fired.\n *\t\tmyEmitter.fire( 'myGroup' );\n *\t\t// both genericCallback and specificCallback are fired.\n *\t\tmyEmitter.fire( 'myGroup:myEvent' );\n *\t\t// genericCallback is fired even though there are no callbacks for \"foo\".\n *\t\tmyEmitter.fire( 'myGroup:foo' );\n *\n * An event callback can {@link module:utils/eventinfo~EventInfo#stop stop the event} and\n * set the {@link module:utils/eventinfo~EventInfo#return return value} of the {@link #fire} method.\n *\n * @method #listenTo\n * @param {module:utils/emittermixin~Emitter} emitter The object that fires the event.\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Stops listening for events. It can be used at different levels:\n *\n * * To stop listening to a specific callback.\n * * To stop listening to a specific event.\n * * To stop listening to all events fired by a specific object.\n * * To stop listening to all events fired by all objects.\n *\n * @method #stopListening\n * @param {module:utils/emittermixin~Emitter} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n * for all events from `emitter`.\n * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n * `event`.\n */\n\n/**\n * Fires an event, executing all callbacks registered for it.\n *\n * The first parameter passed to callbacks is an {@link module:utils/eventinfo~EventInfo} object,\n * followed by the optional `args` provided in the `fire()` method call.\n *\n * @method #fire\n * @param {String|module:utils/eventinfo~EventInfo} eventOrInfo The name of the event or `EventInfo` object if event is delegated.\n * @param {...*} [args] Additional arguments to be passed to the callbacks.\n * @returns {*} By default the method returns `undefined`. However, the return value can be changed by listeners\n * through modification of the {@link module:utils/eventinfo~EventInfo#return `evt.return`}'s property (the event info\n * is the first param of every callback).\n */\n\n/**\n * Delegates selected events to another {@link module:utils/emittermixin~Emitter}. For instance:\n *\n *\t\temitterA.delegate( 'eventX' ).to( emitterB );\n *\t\temitterA.delegate( 'eventX', 'eventY' ).to( emitterC );\n *\n * then `eventX` is delegated (fired by) `emitterB` and `emitterC` along with `data`:\n *\n *\t\temitterA.fire( 'eventX', data );\n *\n * and `eventY` is delegated (fired by) `emitterC` along with `data`:\n *\n *\t\temitterA.fire( 'eventY', data );\n *\n * @method #delegate\n * @param {...String} events Event names that will be delegated to another emitter.\n * @returns {module:utils/emittermixin~EmitterMixinDelegateChain}\n */\n\n/**\n * Stops delegating events. It can be used at different levels:\n *\n * * To stop delegating all events.\n * * To stop delegating a specific event to all emitters.\n * * To stop delegating a specific event to a specific emitter.\n *\n * @method #stopDelegating\n * @param {String} [event] The name of the event to stop delegating. If omitted, stops it all delegations.\n * @param {module:utils/emittermixin~Emitter} [emitter] (requires `event`) The object to stop delegating a particular event to.\n * If omitted, stops delegation of `event` to all emitters.\n */\n\n/**\n * Checks if `listeningEmitter` listens to an emitter with given `listenedToEmitterId` and if so, returns that emitter.\n * If not, returns `null`.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} listeningEmitter An emitter that listens.\n * @param {String} listenedToEmitterId Unique emitter id of emitter listened to.\n * @returns {module:utils/emittermixin~Emitter|null}\n */\nexport function _getEmitterListenedTo( listeningEmitter, listenedToEmitterId ) {\n\tif ( listeningEmitter[ _listeningTo ] && listeningEmitter[ _listeningTo ][ listenedToEmitterId ] ) {\n\t\treturn listeningEmitter[ _listeningTo ][ listenedToEmitterId ].emitter;\n\t}\n\n\treturn null;\n}\n\n/**\n * Sets emitter's unique id.\n *\n * **Note:** `_emitterId` can be set only once.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} emitter An emitter for which id will be set.\n * @param {String} [id] Unique id to set. If not passed, random unique id will be set.\n */\nexport function _setEmitterId( emitter, id ) {\n\tif ( !emitter[ _emitterId ] ) {\n\t\temitter[ _emitterId ] = id || uid();\n\t}\n}\n\n/**\n * Returns emitter's unique id.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} emitter An emitter which id will be returned.\n */\nexport function _getEmitterId( emitter ) {\n\treturn emitter[ _emitterId ];\n}\n\n// Gets the internal `_events` property of the given object.\n// `_events` property store all lists with callbacks for registered event names.\n// If there were no events registered on the object, empty `_events` object is created.\nfunction getEvents( source ) {\n\tif ( !source._events ) {\n\t\tObject.defineProperty( source, '_events', {\n\t\t\tvalue: {}\n\t\t} );\n\t}\n\n\treturn source._events;\n}\n\n// Creates event node for generic-specific events relation architecture.\nfunction makeEventNode() {\n\treturn {\n\t\tcallbacks: [],\n\t\tchildEvents: []\n\t};\n}\n\n// Creates an architecture for generic-specific events relation.\n// If needed, creates all events for given eventName, i.e. if the first registered event\n// is foo:bar:abc, it will create foo:bar:abc, foo:bar and foo event and tie them together.\n// It also copies callbacks from more generic events to more specific events when\n// specific events are created.\nfunction createEventNamespace( source, eventName ) {\n\tconst events = getEvents( source );\n\n\t// First, check if the event we want to add to the structure already exists.\n\tif ( events[ eventName ] ) {\n\t\t// If it exists, we don't have to do anything.\n\t\treturn;\n\t}\n\n\t// In other case, we have to create the structure for the event.\n\t// Note, that we might need to create intermediate events too.\n\t// I.e. if foo:bar:abc is being registered and we only have foo in the structure,\n\t// we need to also register foo:bar.\n\n\t// Currently processed event name.\n\tlet name = eventName;\n\t// Name of the event that is a child event for currently processed event.\n\tlet childEventName = null;\n\n\t// Array containing all newly created specific events.\n\tconst newEventNodes = [];\n\n\t// While loop can't check for ':' index because we have to handle generic events too.\n\t// In each loop, we truncate event name, going from the most specific name to the generic one.\n\t// I.e. foo:bar:abc -> foo:bar -> foo.\n\twhile ( name !== '' ) {\n\t\tif ( events[ name ] ) {\n\t\t\t// If the currently processed event name is already registered, we can be sure\n\t\t\t// that it already has all the structure created, so we can break the loop here\n\t\t\t// as no more events need to be registered.\n\t\t\tbreak;\n\t\t}\n\n\t\t// If this event is not yet registered, create a new object for it.\n\t\tevents[ name ] = makeEventNode();\n\t\t// Add it to the array with newly created events.\n\t\tnewEventNodes.push( events[ name ] );\n\n\t\t// Add previously processed event name as a child of this event.\n\t\tif ( childEventName ) {\n\t\t\tevents[ name ].childEvents.push( childEventName );\n\t\t}\n\n\t\tchildEventName = name;\n\t\t// If `.lastIndexOf()` returns -1, `.substr()` will return '' which will break the loop.\n\t\tname = name.substr( 0, name.lastIndexOf( ':' ) );\n\t}\n\n\tif ( name !== '' ) {\n\t\t// If name is not empty, we found an already registered event that was a parent of the\n\t\t// event we wanted to register.\n\n\t\t// Copy that event's callbacks to newly registered events.\n\t\tfor ( const node of newEventNodes ) {\n\t\t\tnode.callbacks = events[ name ].callbacks.slice();\n\t\t}\n\n\t\t// Add last newly created event to the already registered event.\n\t\tevents[ name ].childEvents.push( childEventName );\n\t}\n}\n\n// Gets an array containing callbacks list for a given event and it's more specific events.\n// I.e. if given event is foo:bar and there is also foo:bar:abc event registered, this will\n// return callback list of foo:bar and foo:bar:abc (but not foo).\nfunction getCallbacksListsForNamespace( source, eventName ) {\n\tconst eventNode = getEvents( source )[ eventName ];\n\n\tif ( !eventNode ) {\n\t\treturn [];\n\t}\n\n\tlet callbacksLists = [ eventNode.callbacks ];\n\n\tfor ( let i = 0; i < eventNode.childEvents.length; i++ ) {\n\t\tconst childCallbacksLists = getCallbacksListsForNamespace( source, eventNode.childEvents[ i ] );\n\n\t\tcallbacksLists = callbacksLists.concat( childCallbacksLists );\n\t}\n\n\treturn callbacksLists;\n}\n\n// Get the list of callbacks for a given event, but only if there any callbacks have been registered.\n// If there are no callbacks registered for given event, it checks if this is a specific event and looks\n// for callbacks for it's more generic version.\nfunction getCallbacksForEvent( source, eventName ) {\n\tlet event;\n\n\tif ( !source._events || !( event = source._events[ eventName ] ) || !event.callbacks.length ) {\n\t\t// There are no callbacks registered for specified eventName.\n\t\t// But this could be a specific-type event that is in a namespace.\n\t\tif ( eventName.indexOf( ':' ) > -1 ) {\n\t\t\t// If the eventName is specific, try to find callback lists for more generic event.\n\t\t\treturn getCallbacksForEvent( source, eventName.substr( 0, eventName.lastIndexOf( ':' ) ) );\n\t\t} else {\n\t\t\t// If this is a top-level generic event, return null;\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn event.callbacks;\n}\n\n// Fires delegated events for given map of destinations.\n//\n// @private\n// * @param {Map.<utils.Emitter>} destinations A map containing\n// `[ {@link module:utils/emittermixin~Emitter}, \"event name\" ]` pair destinations.\n// * @param {utils.EventInfo} eventInfo The original event info object.\n// * @param {Array.<*>} fireArgs Arguments the original event was fired with.\nfunction fireDelegatedEvents( destinations, eventInfo, fireArgs ) {\n\tfor ( let [ emitter, name ] of destinations ) {\n\t\tif ( !name ) {\n\t\t\tname = eventInfo.name;\n\t\t} else if ( typeof name == 'function' ) {\n\t\t\tname = name( eventInfo.name );\n\t\t}\n\n\t\tconst delegatedInfo = new EventInfo( eventInfo.source, name );\n\n\t\tdelegatedInfo.path = [ ...eventInfo.path ];\n\n\t\temitter.fire( delegatedInfo, ...fireArgs );\n\t}\n}\n\n// Removes callback from emitter for given event.\n//\n// @param {module:utils/emittermixin~Emitter} emitter\n// @param {String} event\n// @param {Function} callback\nfunction removeCallback( emitter, event, callback ) {\n\tconst lists = getCallbacksListsForNamespace( emitter, event );\n\n\tfor ( const callbacks of lists ) {\n\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\tif ( callbacks[ i ].callback == callback ) {\n\t\t\t\t// Remove the callback from the list (fixing the next index).\n\t\t\t\tcallbacks.splice( i, 1 );\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * The return value of {@link ~EmitterMixin#delegate}.\n *\n * @interface module:utils/emittermixin~EmitterMixinDelegateChain\n */\n\n/**\n * Selects destination for {@link module:utils/emittermixin~EmitterMixin#delegate} events.\n *\n * @method #to\n * @param {module:utils/emittermixin~Emitter} emitter An `EmitterMixin` instance which is the destination for delegated events.\n * @param {String|Function} [nameOrFunction] A custom event name or function which converts the original name string.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/mix\n */\n\n/**\n * Copies enumerable properties and symbols from the objects given as 2nd+ parameters to the\n * prototype of first object (a constructor).\n *\n *\t\tclass Editor {\n *\t\t\t...\n *\t\t}\n *\n *\t\tconst SomeMixin = {\n *\t\t\ta() {\n *\t\t\t\treturn 'a';\n *\t\t\t}\n *\t\t};\n *\n *\t\tmix( Editor, SomeMixin, ... );\n *\n *\t\tnew Editor().a(); // -> 'a'\n *\n * Note: Properties which already exist in the base class will not be overriden.\n *\n * @param {Function} [baseClass] Class which prototype will be extended.\n * @param {Object} [...mixins] Objects from which to get properties.\n */\nexport default function mix( baseClass, ...mixins ) {\n\tmixins.forEach( mixin => {\n\t\tObject.getOwnPropertyNames( mixin ).concat( Object.getOwnPropertySymbols( mixin ) )\n\t\t\t.forEach( key => {\n\t\t\t\tif ( key in baseClass.prototype ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst sourceDescriptor = Object.getOwnPropertyDescriptor( mixin, key );\n\t\t\t\tsourceDescriptor.enumerable = false;\n\n\t\t\t\tObject.defineProperty( baseClass.prototype, key, sourceDescriptor );\n\t\t\t} );\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/comparearrays\n */\n\n/**\n * Compares how given arrays relate to each other. One array can be: same as another array, prefix of another array\n * or completely different. If arrays are different, first index at which they differ is returned. Otherwise,\n * a flag specifying the relation is returned. Flags are negative numbers, so whenever a number >= 0 is returned\n * it means that arrays differ.\n *\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 2 ] );\t\t// 'same'\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 2, 1 ] );\t\t// 'prefix'\n *\t\tcompareArrays( [ 0, 2 ], [ 0 ] );\t\t\t// 'extension'\n *\t\tcompareArrays( [ 0, 2 ], [ 1, 2 ] );\t\t// 0\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 1 ] );\t\t// 1\n *\n * @param {Array} a Array that is compared.\n * @param {Array} b Array to compare with.\n * @returns {module:utils/comparearrays~ArrayRelation} How array `a` is related to `b`.\n */\nexport default function compareArrays( a, b ) {\n\tconst minLen = Math.min( a.length, b.length );\n\n\tfor ( let i = 0; i < minLen; i++ ) {\n\t\tif ( a[ i ] != b[ i ] ) {\n\t\t\t// The arrays are different.\n\t\t\treturn i;\n\t\t}\n\t}\n\n\t// Both arrays were same at all points.\n\tif ( a.length == b.length ) {\n\t\t// If their length is also same, they are the same.\n\t\treturn 'same';\n\t} else if ( a.length < b.length ) {\n\t\t// Compared array is shorter so it is a prefix of the other array.\n\t\treturn 'prefix';\n\t} else {\n\t\t// Compared array is longer so it is an extension of the other array.\n\t\treturn 'extension';\n\t}\n}\n\n/**\n * @typedef {'extension'|'same'|'prefix'} module:utils/comparearrays~ArrayRelation\n */\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * Creates a shallow clone of `value`.\n *\n * **Note:** This method is loosely based on the\n * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)\n * and supports cloning arrays, array buffers, booleans, date objects, maps,\n * numbers, `Object` objects, regexes, sets, strings, symbols, and typed\n * arrays. The own enumerable properties of `arguments` objects are cloned\n * as plain objects. An empty object is returned for uncloneable values such\n * as error objects, functions, DOM nodes, and WeakMaps.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to clone.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeep\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var shallow = _.clone(objects);\n * console.log(shallow[0] === objects[0]);\n * // => true\n */\nfunction clone(value) {\n return baseClone(value, CLONE_SYMBOLS_FLAG);\n}\n\nexport default clone;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/node\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport { clone } from 'lodash-es';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Abstract tree view node class.\n *\n * This is an abstract class. Its constructor should not be used directly.\n * Use the {@link module:engine/view/element~Element} class to create view elements\n * or {@link module:engine/view/text~Text} class to create view text nodes.\n *\n * @abstract\n */\nexport default class Node {\n\t/**\n\t * Creates a tree view node.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Parent element. Null by default. Set by {@link module:engine/view/element~Element#_insertChild}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t\t */\n\t\tthis.parent = null;\n\t}\n\n\t/**\n\t * Index of the node in the parent element or null if the node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that view tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget index() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// No parent or child doesn't exist in parent's children.\n\t\tif ( ( pos = this.parent.getChildIndex( this ) ) == -1 ) {\n\t\t\t/**\n\t\t\t * The node's parent does not contain this node. It means that the document tree is corrupted.\n\t\t\t *\n\t\t\t * @error view-node-not-found-in-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Node's next sibling, or `null` if it is the last child.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nextSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index + 1 ) ) || null;\n\t}\n\n\t/**\n\t * Node's previous sibling, or `null` if it is the first child.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget previousSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index - 1 ) ) || null;\n\t}\n\n\t/**\n\t * Top-most ancestor of the node. If the node has no parent it is the root itself.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\tlet root = this; // eslint-disable-line consistent-this\n\n\t\twhile ( root.parent ) {\n\t\t\troot = root.parent;\n\t\t}\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/document~Document View document} that owns this node, or `null` if the node is inside\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/document~Document|null}\n\t */\n\tget document() {\n\t\t// Parent might be Node, null or DocumentFragment.\n\t\tif ( this.parent instanceof Node ) {\n\t\t\treturn this.parent.document;\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Gets a path to the node. The path is an array containing indices of consecutive ancestors of this node,\n\t * beginning from {@link module:engine/view/node~Node#root root}, down to this node's index.\n\t *\n\t *\t\tconst abc = downcastWriter.createText( 'abc' );\n\t *\t\tconst foo = downcastWriter.createText( 'foo' );\n\t *\t\tconst h1 = downcastWriter.createElement( 'h1', null, downcastWriter.createText( 'header' ) );\n\t *\t\tconst p = downcastWriter.createElement( 'p', null, [ abc, foo ] );\n\t *\t\tconst div = downcastWriter.createElement( 'div', null, [ h1, p ] );\n\t *\t\tfoo.getPath(); // Returns [ 1, 3 ]. `foo` is in `p` which is in `div`. `p` starts at offset 1, while `foo` at 3.\n\t *\t\th1.getPath(); // Returns [ 0 ].\n\t *\t\tdiv.getPath(); // Returns [].\n\t *\n\t * @returns {Array.<Number>} The path.\n\t */\n\tgetPath() {\n\t\tconst path = [];\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\twhile ( node.parent ) {\n\t\t\tpath.unshift( node.index );\n\t\t\tnode = node.parent;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this node.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this node will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from node's parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/element~Element} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both nodes.\n\t *\n\t * @param {module:engine/view/node~Node} node The second node.\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` both nodes will be considered \"ancestors\" too.\n\t * Which means that if e.g. node A is inside B, then their common ancestor will be B.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( node, options = {} ) {\n\t\tconst ancestorsA = this.getAncestors( options );\n\t\tconst ancestorsB = node.getAncestors( options );\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns whether this node is before given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/view/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/view/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisBefore( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisPath = this.getPath();\n\t\tconst nodePath = node.getPath();\n\n\t\tconst result = compareArrays( thisPath, nodePath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn true;\n\n\t\t\tcase 'extension':\n\t\t\t\treturn false;\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < nodePath[ result ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns whether this node is after given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/view/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/view/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisAfter( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// In other cases, just check if the `node` is before, and return the opposite.\n\t\treturn !this.isBefore( node );\n\t}\n\n\t/**\n\t * Removes node from parent.\n\t *\n\t * @protected\n\t */\n\t_remove() {\n\t\tthis.parent._removeChildren( this.index );\n\t}\n\n\t/**\n\t * @protected\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Changed node.\n\t * @fires change\n\t */\n\t_fireChange( type, node ) {\n\t\tthis.fire( 'change:' + type, node );\n\n\t\tif ( this.parent ) {\n\t\t\tthis.parent._fireChange( type, node );\n\t\t}\n\t}\n\n\t/**\n\t * Custom toJSON method to solve child-parent circular dependencies.\n\t *\n\t * @returns {Object} Clone of this object with the parent property removed.\n\t */\n\ttoJSON() {\n\t\tconst json = clone( this );\n\n\t\t// Due to circular references we need to remove parent reference.\n\t\tdelete json.parent;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t * This method is useful when processing view objects that are of unknown type. For example, a function\n\t * may return a {@link module:engine/view/documentfragment~DocumentFragment} or a {@link module:engine/view/node~Node}\n\t * that can be either a text node or an element. This method can be used to check what kind of object is returned.\n\t *\n\t *\t\tsomeObject.is( 'element' ); // -> true if this is an element\n\t *\t\tsomeObject.is( 'node' ); // -> true if this is a node (a text node or an element)\n\t *\t\tsomeObject.is( 'documentFragment' ); // -> true if this is a document fragment\n\t *\n\t * Since this method is also available on a range of model objects, you can prefix the type of the object with\n\t * `model:` or `view:` to check, for example, if this is the model's or view's element:\n\t *\n\t *\t\tviewElement.is( 'view:element' ); // -> true\n\t *\t\tviewElement.is( 'model:element' ); // -> false\n\t *\n\t * By using this method it is also possible to check a name of an element:\n\t *\n\t *\t\timgElement.is( 'img' ); // -> true\n\t *\t\timgElement.is( 'element', 'img' ); // -> same as above\n\t *\t\timgElement.is( 'view:element', 'img' ); // -> same as above, but more precise\n\t *\n\t * The list of view objects which implement the `is()` method:\n\t *\n\t * * {@link module:engine/view/attributeelement~AttributeElement#is `AttributeElement#is()`}\n\t * * {@link module:engine/view/containerelement~ContainerElement#is `ContainerElement#is()`}\n\t * * {@link module:engine/view/documentfragment~DocumentFragment#is `DocumentFragment#is()`}\n\t * * {@link module:engine/view/documentselection~DocumentSelection#is `DocumentSelection#is()`}\n\t * * {@link module:engine/view/editableelement~EditableElement#is `EditableElement#is()`}\n\t * * {@link module:engine/view/element~Element#is `Element#is()`}\n\t * * {@link module:engine/view/emptyelement~EmptyElement#is `EmptyElement#is()`}\n\t * * {@link module:engine/view/node~Node#is `Node#is()`}\n\t * * {@link module:engine/view/position~Position#is `Position#is()`}\n\t * * {@link module:engine/view/range~Range#is `Range#is()`}\n\t * * {@link module:engine/view/rooteditableelement~RootEditableElement#is `RootEditableElement#is()`}\n\t * * {@link module:engine/view/selection~Selection#is `Selection#is()`}\n\t * * {@link module:engine/view/text~Text#is `Text#is()`}\n\t * * {@link module:engine/view/textproxy~TextProxy#is `TextProxy#is()`}\n\t * * {@link module:engine/view/uielement~UIElement#is `UIElement#is()`}\n\t *\n\t * @method #is\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'node' || type == 'view:node';\n\t}\n\n\t/**\n\t * Clones this node.\n\t *\n\t * @protected\n\t * @method #_clone\n\t * @returns {module:engine/view/node~Node} Clone of this node.\n\t */\n\n\t/**\n\t * Checks if provided node is similar to this node.\n\t *\n\t * @method #isSimilar\n\t * @returns {Boolean} True if nodes are similar.\n\t */\n}\n\n/**\n * Fired when list of {@link module:engine/view/element~Element elements} children changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:children\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * Fired when list of {@link module:engine/view/element~Element elements} attributes changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:attributes\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * Fired when {@link module:engine/view/text~Text text nodes} data changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:text\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * @event change\n */\n\nmix( Node, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/text\n */\n\nimport Node from './node';\n\n/**\n * Tree view text node.\n *\n * The constructor of this class shouldn't be used directly. To create new Text instances\n * use the {@link module:engine/view/downcastwriter~DowncastWriter#createText `DowncastWriter#createText()`}\n * method when working on data downcasted from the model or the\n * {@link module:engine/view/upcastwriter~UpcastWriter#createText `UpcastWriter#createText()`}\n * method when working on non-semantic views.\n *\n * @extends module:engine/view/node~Node\n */\nexport default class Text extends Node {\n\t/**\n\t * Creates a tree view text node.\n\t *\n\t * @protected\n\t * @param {String} data The text's data.\n\t */\n\tconstructor( data ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * The text content.\n\t\t *\n\t\t * Setting the data fires the {@link module:engine/view/node~Node#event:change:text change event}.\n\t\t *\n\t\t * @protected\n\t\t * @member {String} module:engine/view/text~Text#_textData\n\t\t */\n\t\tthis._textData = data;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\ttext.is( 'text' ); // -> true\n\t *\t\ttext.is( 'node' ); // -> true\n\t *\t\ttext.is( 'view:text' ); // -> true\n\t *\t\ttext.is( 'view:node' ); // -> true\n\t *\n\t *\t\ttext.is( 'model:text' ); // -> false\n\t *\t\ttext.is( 'element' ); // -> false\n\t *\t\ttext.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'text' || type == 'view:text' || super.is( type );\n\t}\n\n\t/**\n\t * The text content.\n\t *\n\t * @readonly\n\t * @type {String}\n\t */\n\tget data() {\n\t\treturn this._textData;\n\t}\n\n\t/**\n\t * This getter is required when using the addition assignment operator on protected property:\n\t *\n\t *\t\tconst foo = downcastWriter.createText( 'foo' );\n\t *\t\tconst bar = downcastWriter.createText( 'bar' );\n\t *\n\t *\t\tfoo._data += bar.data; // executes: `foo._data = foo._data + bar.data`\n\t *\t\tconsole.log( foo.data ); // prints: 'foobar'\n\t *\n\t * If the protected getter didn't exist, `foo._data` will return `undefined` and result of the merge will be invalid.\n\t *\n\t * @protected\n\t * @type {String}\n\t */\n\tget _data() {\n\t\treturn this.data;\n\t}\n\n\t/**\n\t * Sets data and fires the {@link module:engine/view/node~Node#event:change:text change event}.\n\t *\n\t * @protected\n\t * @fires change:text\n\t * @param {String} data New data for the text node.\n\t */\n\tset _data( data ) {\n\t\tthis._fireChange( 'text', this );\n\n\t\tthis._textData = data;\n\t}\n\n\t/**\n\t * Checks if this text node is similar to other text node.\n\t * Both nodes should have the same data to be considered as similar.\n\t *\n\t * @param {module:engine/view/text~Text} otherNode Node to check if it is same as this node.\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherNode ) {\n\t\tif ( !( otherNode instanceof Text ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this === otherNode || this.data === otherNode.data;\n\t}\n\n\t/**\n\t * Clones this node.\n\t *\n\t * @protected\n\t * @returns {module:engine/view/text~Text} Text node that is a clone of this node.\n\t */\n\t_clone() {\n\t\treturn new Text( this.data );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/textproxy\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * TextProxy is a wrapper for substring of {@link module:engine/view/text~Text}. Instance of this class is created by\n * {@link module:engine/view/treewalker~TreeWalker} when only a part of {@link module:engine/view/text~Text} needs to be returned.\n *\n * `TextProxy` has an API similar to {@link module:engine/view/text~Text Text} and allows to do most of the common tasks performed\n * on view nodes.\n *\n * **Note:** Some `TextProxy` instances may represent whole text node, not just a part of it.\n * See {@link module:engine/view/textproxy~TextProxy#isPartial}.\n *\n * **Note:** `TextProxy` is a readonly interface.\n *\n * **Note:** `TextProxy` instances are created on the fly basing on the current state of parent {@link module:engine/view/text~Text}.\n * Because of this it is highly unrecommended to store references to `TextProxy instances because they might get\n * invalidated due to operations on Document. Also TextProxy is not a {@link module:engine/view/node~Node} so it can not be\n * inserted as a child of {@link module:engine/view/element~Element}.\n *\n * `TextProxy` instances are created by {@link module:engine/view/treewalker~TreeWalker view tree walker}. You should not need to create\n * an instance of this class by your own.\n */\nexport default class TextProxy {\n\t/**\n\t * Creates a text proxy.\n\t *\n\t * @protected\n\t * @param {module:engine/view/text~Text} textNode Text node which part is represented by this text proxy.\n\t * @param {Number} offsetInText Offset in {@link module:engine/view/textproxy~TextProxy#textNode text node}\n\t * from which the text proxy starts.\n\t * @param {Number} length Text proxy length, that is how many text node's characters, starting from `offsetInText` it represents.\n\t * @constructor\n\t */\n\tconstructor( textNode, offsetInText, length ) {\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/text~Text} element which TextProxy is a substring.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/text~Text} module:engine/view/textproxy~TextProxy#textNode\n\t\t */\n\t\tthis.textNode = textNode;\n\n\t\tif ( offsetInText < 0 || offsetInText > textNode.data.length ) {\n\t\t\t/**\n\t\t\t * Given offsetInText value is incorrect.\n\t\t\t *\n\t\t\t * @error view-textproxy-wrong-offsetintext\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.', this );\n\t\t}\n\n\t\tif ( length < 0 || offsetInText + length > textNode.data.length ) {\n\t\t\t/**\n\t\t\t * Given length value is incorrect.\n\t\t\t *\n\t\t\t * @error view-textproxy-wrong-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-textproxy-wrong-length: Given length value is incorrect.', this );\n\t\t}\n\n\t\t/**\n\t\t * Text data represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:engine/view/textproxy~TextProxy#data\n\t\t */\n\t\tthis.data = textNode.data.substring( offsetInText, offsetInText + length );\n\n\t\t/**\n\t\t * Offset in the `textNode` where this `TextProxy` instance starts.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} module:engine/view/textproxy~TextProxy#offsetInText\n\t\t */\n\t\tthis.offsetInText = offsetInText;\n\t}\n\n\t/**\n\t * Offset size of this node.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Flag indicating whether `TextProxy` instance covers only part of the original {@link module:engine/view/text~Text text node}\n\t * (`true`) or the whole text node (`false`).\n\t *\n\t * This is `false` when text proxy starts at the very beginning of {@link module:engine/view/textproxy~TextProxy#textNode textNode}\n\t * ({@link module:engine/view/textproxy~TextProxy#offsetInText offsetInText} equals `0`) and text proxy sizes is equal to\n\t * text node size.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isPartial() {\n\t\treturn this.data.length !== this.textNode.data.length;\n\t}\n\n\t/**\n\t * Parent of this text proxy, which is same as parent of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tget parent() {\n\t\treturn this.textNode.parent;\n\t}\n\n\t/**\n\t * Root of this text proxy, which is same as root of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.textNode.root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/document~Document View document} that owns this text proxy, or `null` if the text proxy is inside\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this.textNode.document;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\ttextProxy.is( 'textProxy' ); // -> true\n\t *\t\ttextProxy.is( 'view:textProxy' ); // -> true\n\t *\n\t *\t\ttextProxy.is( 'model:textProxy' ); // -> false\n\t *\t\ttextProxy.is( 'element' ); // -> false\n\t *\t\ttextProxy.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'textProxy' || type == 'view:textProxy';\n\t}\n\n\t/**\n\t * Returns ancestors array of this text proxy.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` {#textNode} will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from text proxy parent to\n\t * root element, otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this.textNode : this.parent;\n\n\t\twhile ( parent !== null ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/objecttomap\n */\n\n/**\n * Transforms object to map.\n *\n *\t\tconst map = objectToMap( { 'foo': 1, 'bar': 2 } );\n *\t\tmap.get( 'foo' ); // 1\n *\n * @param {Object} obj Object to transform.\n * @returns {Map} Map created from object.\n */\nexport default function objectToMap( obj ) {\n\tconst map = new Map();\n\n\tfor ( const key in obj ) {\n\t\tmap.set( key, obj[ key ] );\n\t}\n\n\treturn map;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/isiterable\n */\n\n/**\n * Checks if value implements iterator interface.\n *\n * @param {*} value The value to check.\n * @returns {Boolean} True if value implements iterator interface.\n */\nexport default function isIterable( value ) {\n\treturn !!( value && value[ Symbol.iterator ] );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/matcher\n */\n\n/**\n * View matcher class.\n * Instance of this class can be used to find {@link module:engine/view/element~Element elements} that match given pattern.\n */\nexport default class Matcher {\n\t/**\n\t * Creates new instance of Matcher.\n\t *\n\t * @param {String|RegExp|Object} [pattern] Match patterns. See {@link module:engine/view/matcher~Matcher#add add method} for\n\t * more information.\n\t */\n\tconstructor( ...pattern ) {\n\t\t/**\n\t\t * @private\n\t\t * @type {Array<String|RegExp|Object>}\n\t\t */\n\t\tthis._patterns = [];\n\n\t\tthis.add( ...pattern );\n\t}\n\n\t/**\n\t * Adds pattern or patterns to matcher instance.\n\t *\n\t *\t\t// String.\n\t *\t\tmatcher.add( 'div' );\n\t *\n\t *\t\t// Regular expression.\n\t *\t\tmatcher.add( /^\\w/ );\n\t *\n\t *\t\t// Single class.\n\t *\t\tmatcher.add( {\n\t *\t\t\tclasses: 'foobar'\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/view/matcher~MatcherPattern} for more examples.\n\t *\n\t * Multiple patterns can be added in one call:\n\t *\n\t * \t\tmatcher.add( 'div', { classes: 'foobar' } );\n\t *\n\t * @param {Object|String|RegExp|Function} pattern Object describing pattern details. If string or regular expression\n\t * is provided it will be used to match element's name. Pattern can be also provided in a form\n\t * of a function - then this function will be called with each {@link module:engine/view/element~Element element} as a parameter.\n\t * Function's return value will be stored under `match` key of the object returned from\n\t * {@link module:engine/view/matcher~Matcher#match match} or {@link module:engine/view/matcher~Matcher#matchAll matchAll} methods.\n\t * @param {String|RegExp} [pattern.name] Name or regular expression to match element's name.\n\t * @param {Object} [pattern.attributes] Object with key-value pairs representing attributes to match. Each object key\n\t * represents attribute name. Value under that key can be either:\n\t * * `true` - then attribute is just required (can be empty),\n\t * * a string - then attribute has to be equal, or\n\t * * a regular expression - then attribute has to match the expression.\n\t * @param {String|RegExp|Array} [pattern.classes] Class name or array of class names to match. Each name can be\n\t * provided in a form of string or regular expression.\n\t * @param {Object} [pattern.styles] Object with key-value pairs representing styles to match. Each object key\n\t * represents style name. Value under that key can be either a string or a regular expression and it will be used\n\t * to match style value.\n\t */\n\tadd( ...pattern ) {\n\t\tfor ( let item of pattern ) {\n\t\t\t// String or RegExp pattern is used as element's name.\n\t\t\tif ( typeof item == 'string' || item instanceof RegExp ) {\n\t\t\t\titem = { name: item };\n\t\t\t}\n\n\t\t\t// Single class name/RegExp can be provided.\n\t\t\tif ( item.classes && ( typeof item.classes == 'string' || item.classes instanceof RegExp ) ) {\n\t\t\t\titem.classes = [ item.classes ];\n\t\t\t}\n\n\t\t\tthis._patterns.push( item );\n\t\t}\n\t}\n\n\t/**\n\t * Matches elements for currently stored patterns. Returns match information about first found\n\t * {@link module:engine/view/element~Element element}, otherwise returns `null`.\n\t *\n\t * Example of returned object:\n\t *\n\t *\t\t{\n\t *\t\t\telement: <instance of found element>,\n\t *\t\t\tpattern: <pattern used to match found element>,\n\t *\t\t\tmatch: {\n\t *\t\t\t\tname: true,\n\t *\t\t\t\tattributes: [ 'title', 'href' ],\n\t *\t\t\t\tclasses: [ 'foo' ],\n\t *\t\t\t\tstyles: [ 'color', 'position' ]\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * @see module:engine/view/matcher~Matcher#add\n\t * @see module:engine/view/matcher~Matcher#matchAll\n\t * @param {...module:engine/view/element~Element} element View element to match against stored patterns.\n\t * @returns {Object|null} result\n\t * @returns {module:engine/view/element~Element} result.element Matched view element.\n\t * @returns {Object|String|RegExp|Function} result.pattern Pattern that was used to find matched element.\n\t * @returns {Object} result.match Object representing matched element parts.\n\t * @returns {Boolean} [result.match.name] True if name of the element was matched.\n\t * @returns {Array} [result.match.attributes] Array with matched attribute names.\n\t * @returns {Array} [result.match.classes] Array with matched class names.\n\t * @returns {Array} [result.match.styles] Array with matched style names.\n\t */\n\tmatch( ...element ) {\n\t\tfor ( const singleElement of element ) {\n\t\t\tfor ( const pattern of this._patterns ) {\n\t\t\t\tconst match = isElementMatching( singleElement, pattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\treturn {\n\t\t\t\t\t\telement: singleElement,\n\t\t\t\t\t\tpattern,\n\t\t\t\t\t\tmatch\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Matches elements for currently stored patterns. Returns array of match information with all found\n\t * {@link module:engine/view/element~Element elements}. If no element is found - returns `null`.\n\t *\n\t * @see module:engine/view/matcher~Matcher#add\n\t * @see module:engine/view/matcher~Matcher#match\n\t * @param {...module:engine/view/element~Element} element View element to match against stored patterns.\n\t * @returns {Array.<Object>|null} Array with match information about found elements or `null`. For more information\n\t * see {@link module:engine/view/matcher~Matcher#match match method} description.\n\t */\n\tmatchAll( ...element ) {\n\t\tconst results = [];\n\n\t\tfor ( const singleElement of element ) {\n\t\t\tfor ( const pattern of this._patterns ) {\n\t\t\t\tconst match = isElementMatching( singleElement, pattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\tresults.push( {\n\t\t\t\t\t\telement: singleElement,\n\t\t\t\t\t\tpattern,\n\t\t\t\t\t\tmatch\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn results.length > 0 ? results : null;\n\t}\n\n\t/**\n\t * Returns the name of the element to match if there is exactly one pattern added to the matcher instance\n\t * and it matches element name defined by `string` (not `RegExp`). Otherwise, returns `null`.\n\t *\n\t * @returns {String|null} Element name trying to match.\n\t */\n\tgetElementName() {\n\t\tif ( this._patterns.length !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst pattern = this._patterns[ 0 ];\n\t\tconst name = pattern.name;\n\n\t\treturn ( typeof pattern != 'function' && name && !( name instanceof RegExp ) ) ? name : null;\n\t}\n}\n\n// Returns match information if {@link module:engine/view/element~Element element} is matching provided pattern.\n// If element cannot be matched to provided pattern - returns `null`.\n//\n// @param {module:engine/view/element~Element} element\n// @param {Object|String|RegExp|Function} pattern\n// @returns {Object|null} Returns object with match information or null if element is not matching.\nfunction isElementMatching( element, pattern ) {\n\t// If pattern is provided as function - return result of that function;\n\tif ( typeof pattern == 'function' ) {\n\t\treturn pattern( element );\n\t}\n\n\tconst match = {};\n\t// Check element's name.\n\tif ( pattern.name ) {\n\t\tmatch.name = matchName( pattern.name, element.name );\n\n\t\tif ( !match.name ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// Check element's attributes.\n\tif ( pattern.attributes ) {\n\t\tmatch.attributes = matchAttributes( pattern.attributes, element );\n\n\t\tif ( !match.attributes ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// Check element's classes.\n\tif ( pattern.classes ) {\n\t\tmatch.classes = matchClasses( pattern.classes, element );\n\n\t\tif ( !match.classes ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Check element's styles.\n\tif ( pattern.styles ) {\n\t\tmatch.styles = matchStyles( pattern.styles, element );\n\n\t\tif ( !match.styles ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if name can be matched by provided pattern.\n//\n// @param {String|RegExp} pattern\n// @param {String} name\n// @returns {Boolean} Returns `true` if name can be matched, `false` otherwise.\nfunction matchName( pattern, name ) {\n\t// If pattern is provided as RegExp - test against this regexp.\n\tif ( pattern instanceof RegExp ) {\n\t\treturn pattern.test( name );\n\t}\n\n\treturn pattern === name;\n}\n\n// Checks if attributes of provided element can be matched against provided patterns.\n//\n// @param {Object} patterns Object with information about attributes to match. Each key of the object will be\n// used as attribute name. Value of each key can be a string or regular expression to match against attribute value.\n// @param {module:engine/view/element~Element} element Element which attributes will be tested.\n// @returns {Array|null} Returns array with matched attribute names or `null` if no attributes were matched.\nfunction matchAttributes( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const name in patterns ) {\n\t\tconst pattern = patterns[ name ];\n\n\t\tif ( element.hasAttribute( name ) ) {\n\t\t\tconst attribute = element.getAttribute( name );\n\n\t\t\tif ( pattern === true ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else if ( pattern instanceof RegExp ) {\n\t\t\t\tif ( pattern.test( attribute ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t} else if ( attribute === pattern ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if classes of provided element can be matched against provided patterns.\n//\n// @param {Array.<String|RegExp>} patterns Array of strings or regular expressions to match against element's classes.\n// @param {module:engine/view/element~Element} element Element which classes will be tested.\n// @returns {Array|null} Returns array with matched class names or `null` if no classes were matched.\nfunction matchClasses( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const pattern of patterns ) {\n\t\tif ( pattern instanceof RegExp ) {\n\t\t\tconst classes = element.getClassNames();\n\n\t\t\tfor ( const name of classes ) {\n\t\t\t\tif ( pattern.test( name ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( match.length === 0 ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else if ( element.hasClass( pattern ) ) {\n\t\t\tmatch.push( pattern );\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if styles of provided element can be matched against provided patterns.\n//\n// @param {Object} patterns Object with information about styles to match. Each key of the object will be\n// used as style name. Value of each key can be a string or regular expression to match against style value.\n// @param {module:engine/view/element~Element} element Element which styles will be tested.\n// @returns {Array|null} Returns array with matched style names or `null` if no styles were matched.\nfunction matchStyles( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const name in patterns ) {\n\t\tconst pattern = patterns[ name ];\n\n\t\tif ( element.hasStyle( name ) ) {\n\t\t\tconst style = element.getStyle( name );\n\n\t\t\tif ( pattern instanceof RegExp ) {\n\t\t\t\tif ( pattern.test( style ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t} else if ( style === pattern ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n/**\n * An entity that is a valid pattern recognized by a matcher. `MatcherPattern` is used by {@link ~Matcher} to recognize\n * if a view element fits in a group of view elements described by the pattern.\n *\n * `MatcherPattern` can be given as a `String`, a `RegExp`, an `Object` or a `Function`.\n *\n * If `MatcherPattern` is given as a `String` or `RegExp`, it will match any view element that has a matching name:\n *\n *\t\t// Match any element with name equal to 'div'.\n *\t\tconst pattern = 'div';\n *\n *\t\t// Match any element which name starts on 'p'.\n *\t\tconst pattern = /^p/;\n *\n * If `MatcherPattern` is given as an `Object`, all the object's properties will be matched with view element properties.\n *\n *\t\t// Match view element's name.\n *\t\tconst pattern = { name: /^p/ };\n *\n *\t\t// Match view element which has matching attributes.\n *\t\tconst pattern = {\n *\t\t\tattributes: {\n *\t\t\t\ttitle: 'foobar',\t// Attribute title should equal 'foobar'.\n *\t\t\t\tfoo: /^\\w+/,\t\t// Attribute foo should match /^\\w+/ regexp.\n *\t\t\t\tbar: true\t\t\t// Attribute bar should be set (can be empty).\n *\t\t\t}\n *\t\t};\n *\n *\t\t// Match view element which has given class.\n *\t\tconst pattern = {\n *\t\t\tclasses: 'foobar'\n *\t\t};\n *\n *\t\t// Match view element class using regular expression.\n *\t\tconst pattern = {\n *\t\t\tclasses: /foo.../\n *\t\t};\n *\n *\t\t// Multiple classes to match.\n *\t\tconst pattern = {\n *\t\t\tclasses: [ 'baz', 'bar', /foo.../ ]\n *\t\t};\n *\n *\t\t// Match view element which has given styles.\n *\t\tconst pattern = {\n *\t\t\tstyles: {\n *\t\t\t\tposition: 'absolute',\n *\t\t\t\tcolor: /^\\w*blue$/\n *\t\t\t}\n *\t\t};\n *\n *\t\t// Pattern with multiple properties.\n *\t\tconst pattern = {\n *\t\t\tname: 'span',\n *\t\t\tstyles: {\n *\t\t\t\t'font-weight': 'bold'\n *\t\t\t},\n *\t\t\tclasses: 'highlighted'\n *\t\t};\n *\n * If `MatcherPattern` is given as a `Function`, the function takes a view element as a first and only parameter and\n * the function should decide whether that element matches. If so, it should return what part of the view element has been matched.\n * Otherwise, the function should return `null`. The returned result will be included in `match` property of the object\n * returned by {@link ~Matcher#match} call.\n *\n *\t\t// Match an empty <div> element.\n *\t\tconst pattern = element => {\n *\t\t\tif ( element.name == 'div' && element.childCount > 0 ) {\n *\t\t\t\t// Return which part of the element was matched.\n *\t\t\t\treturn { name: true };\n *\t\t\t}\n *\n *\t\t\treturn null;\n *\t\t};\n *\n *\t\t// Match a <p> element with big font (\"heading-like\" element).\n *\t\tconst pattern = element => {\n *\t\t\tif ( element.name == 'p' ) {\n *\t\t\t\tconst fontSize = element.getStyle( 'font-size' );\n *\t\t\t\tconst size = fontSize.match( /(\\d+)/px );\n *\n *\t\t\t\tif ( size && Number( size[ 1 ] ) > 26 ) {\n *\t\t\t\t\treturn { name: true, attribute: [ 'font-size' ] };\n *\t\t\t\t}\n *\t\t\t}\n *\n *\t\t\treturn null;\n *\t\t};\n *\n * `MatcherPattern` is defined in a way that it is a superset of {@link module:engine/view/elementdefinition~ElementDefinition},\n * that is, every `ElementDefinition` also can be used as a `MatcherPattern`.\n *\n * @typedef {String|RegExp|Object|Function} module:engine/view/matcher~MatcherPattern\n *\n * @property {String|RegExp} [name] View element name to match.\n * @property {String|RegExp|Array.<String|RegExp>} [classes] View element's class name(s) to match.\n * @property {Object} [styles] Object with key-value pairs representing styles to match.\n * Each object key represents style name. Value can be given as `String` or `RegExp`.\n * @property {Object} [attributes] Object with key-value pairs representing attributes to match.\n * Each object key represents attribute name. Value can be given as `String` or `RegExp`.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/element\n */\n\nimport Node from './node';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport objectToMap from '@ckeditor/ckeditor5-utils/src/objecttomap';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport Matcher from './matcher';\nimport { isPlainObject } from 'lodash-es';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToTags } = require( '../dev-utils/utils' );\n\n/**\n * View element.\n *\n * The editing engine does not define a fixed semantics of its elements (it is \"DTD-free\").\n * This is why the type of the {@link module:engine/view/element~Element} need to\n * be defined by the feature developer. When creating an element you should use one of the following methods:\n *\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createContainerElement `downcastWriter#createContainerElement()`}\n * in order to create a {@link module:engine/view/containerelement~ContainerElement},\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createAttributeElement `downcastWriter#createAttributeElement()`}\n * in order to create a {@link module:engine/view/attributeelement~AttributeElement},\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createEmptyElement `downcastWriter#createEmptyElement()`}\n * in order to create a {@link module:engine/view/emptyelement~EmptyElement}.\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`}\n * in order to create a {@link module:engine/view/uielement~UIElement}.\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createEditableElement `downcastWriter#createEditableElement()`}\n * in order to create a {@link module:engine/view/editableelement~EditableElement}.\n *\n * Note that for view elements which are not created from the model, like elements from mutations, paste or\n * {@link module:engine/controller/datacontroller~DataController#set data.set} it is not possible to define the type of the element.\n * In such cases the {@link module:engine/view/upcastwriter~UpcastWriter#createElement `UpcastWriter#createElement()`} method\n * should be used to create generic view elements.\n *\n * @extends module:engine/view/node~Node\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a view element.\n\t *\n\t * Attributes can be passed in various formats:\n\t *\n\t *\t\tnew Element( 'div', { class: 'editor', contentEditable: 'true' } ); // object\n\t *\t\tnew Element( 'div', [ [ 'class', 'editor' ], [ 'contentEditable', 'true' ] ] ); // map-like iterator\n\t *\t\tnew Element( 'div', mapOfAttributes ); // map\n\t *\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attrs] Collection of attributes.\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * Name of the element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Map of attributes, where attributes names are keys and attributes values are values.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map} #_attrs\n\t\t */\n\t\tthis._attrs = parseAttributes( attrs );\n\n\t\t/**\n\t\t * Array of child nodes.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis._children = [];\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\n\t\t/**\n\t\t * Set of classes associated with element instance.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._classes = new Set();\n\n\t\tif ( this._attrs.has( 'class' ) ) {\n\t\t\t// Remove class attribute and handle it by class set.\n\t\t\tconst classString = this._attrs.get( 'class' );\n\t\t\tparseClasses( this._classes, classString );\n\t\t\tthis._attrs.delete( 'class' );\n\t\t}\n\n\t\t/**\n\t\t * Map of styles.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map} module:engine/view/element~Element#_styles\n\t\t */\n\t\tthis._styles = new Map();\n\n\t\tif ( this._attrs.has( 'style' ) ) {\n\t\t\t// Remove style attribute and handle it by styles map.\n\t\t\tparseInlineStyles( this._styles, this._attrs.get( 'style' ) );\n\t\t\tthis._attrs.delete( 'style' );\n\t\t}\n\n\t\t/**\n\t\t * Map of custom properties.\n\t\t * Custom properties can be added to element instance, will be cloned but not rendered into DOM.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map}\n\t\t */\n\t\tthis._customProperties = new Map();\n\t}\n\n\t/**\n\t * Number of element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this._children.length === 0;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\telement.is( 'element' ); // -> true\n\t *\t\telement.is( 'node' ); // -> true\n\t *\t\telement.is( 'view:element' ); // -> true\n\t *\t\telement.is( 'view:node' ); // -> true\n\t *\n\t *\t\telement.is( 'model:element' ); // -> false\n\t *\t\telement.is( 'documentSelection' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/view/element~Element#name name}:\n\t *\n\t *\t\telement.is( 'img' ); // -> true if this is an <img> element\n\t *\t\telement.is( 'element', 'img' ); // -> same as above\n\t *\t\ttext.is( 'img' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'element' || cutType == this.name || super.is( type );\n\t\t} else {\n\t\t\treturn cutType == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Gets child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/view/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children[ index ];\n\t}\n\n\t/**\n\t * Gets index of the given child node. Returns `-1` if child node is not found.\n\t *\n\t * @param {module:engine/view/node~Node} node Child node.\n\t * @returns {Number} Index of the child node.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.indexOf( node );\n\t}\n\n\t/**\n\t * Gets child nodes iterator.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>} Child nodes iterator.\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an iterator that contains the keys for attributes. Order of inserting attributes is not preserved.\n\t *\n\t * @returns {Iterable.<String>} Keys for attributes.\n\t */\n\t* getAttributeKeys() {\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield 'class';\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield 'style';\n\t\t}\n\n\t\tyield* this._attrs.keys();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this element's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getAttributes() {\n\t\tyield* this._attrs.entries();\n\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield [ 'class', this.getAttribute( 'class' ) ];\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield [ 'style', this.getAttribute( 'style' ) ];\n\t\t}\n\t}\n\n\t/**\n\t * Gets attribute by key. If attribute is not present - returns undefined.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {String|undefined} Attribute value.\n\t */\n\tgetAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\treturn [ ...this._classes ].join( ' ' );\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tlet styleString = '';\n\n\t\t\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\t\t\tstyleString += `${ property }:${ value };`;\n\t\t\t\t}\n\n\t\t\t\treturn styleString;\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns a boolean indicating whether an attribute with the specified key exists in the element.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} `true` if attribute with the specified key exists in the element, false otherwise.\n\t */\n\thasAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\treturn this._classes.size > 0;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\treturn this._styles.size > 0;\n\t\t}\n\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Checks if this element is similar to other element.\n\t * Both elements should have the same name and attributes to be considered as similar. Two similar elements\n\t * can contain different set of children nodes.\n\t *\n\t * @param {module:engine/view/element~Element} otherElement\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherElement ) {\n\t\tif ( !( otherElement instanceof Element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If exactly the same Element is provided - return true immediately.\n\t\tif ( this === otherElement ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Check element name.\n\t\tif ( this.name != otherElement.name ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check number of attributes, classes and styles.\n\t\tif ( this._attrs.size !== otherElement._attrs.size || this._classes.size !== otherElement._classes.size ||\n\t\t\tthis._styles.size !== otherElement._styles.size ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes are the same.\n\t\tfor ( const [ key, value ] of this._attrs ) {\n\t\t\tif ( !otherElement._attrs.has( key ) || otherElement._attrs.get( key ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if classes are the same.\n\t\tfor ( const className of this._classes ) {\n\t\t\tif ( !otherElement._classes.has( className ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles are the same.\n\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\tif ( !otherElement._styles.has( property ) || otherElement._styles.get( property ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns true if class is present.\n\t * If more then one class is provided - returns true only when all classes are present.\n\t *\n\t *\t\telement.hasClass( 'foo' ); // Returns true if 'foo' class is present.\n\t *\t\telement.hasClass( 'foo', 'bar' ); // Returns true if 'foo' and 'bar' classes are both present.\n\t *\n\t * @param {...String} className\n\t */\n\thasClass( ...className ) {\n\t\tfor ( const name of className ) {\n\t\t\tif ( !this._classes.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns iterator that contains all class names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetClassNames() {\n\t\treturn this._classes.keys();\n\t}\n\n\t/**\n\t * Returns style value for given property.\n\t * Undefined is returned if style does not exist.\n\t *\n\t * @param {String} property\n\t * @returns {String|undefined}\n\t */\n\tgetStyle( property ) {\n\t\treturn this._styles.get( property );\n\t}\n\n\t/**\n\t * Returns iterator that contains all style names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetStyleNames() {\n\t\treturn this._styles.keys();\n\t}\n\n\t/**\n\t * Returns true if style keys are present.\n\t * If more then one style property is provided - returns true only when all properties are present.\n\t *\n\t *\t\telement.hasStyle( 'color' ); // Returns true if 'border-top' style is present.\n\t *\t\telement.hasStyle( 'color', 'border-top' ); // Returns true if 'color' and 'border-top' styles are both present.\n\t *\n\t * @param {...String} property\n\t */\n\thasStyle( ...property ) {\n\t\tfor ( const name of property ) {\n\t\t\tif ( !this._styles.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns ancestor element that match specified pattern.\n\t * Provided patterns should be compatible with {@link module:engine/view/matcher~Matcher Matcher} as it is used internally.\n\t *\n\t * @see module:engine/view/matcher~Matcher\n\t * @param {Object|String|RegExp|Function} patterns Patterns used to match correct ancestor.\n\t * See {@link module:engine/view/matcher~Matcher}.\n\t * @returns {module:engine/view/element~Element|null} Found element or `null` if no matching ancestor was found.\n\t */\n\tfindAncestor( ...patterns ) {\n\t\tconst matcher = new Matcher( ...patterns );\n\t\tlet parent = this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tif ( matcher.match( parent ) ) {\n\t\t\t\treturn parent;\n\t\t\t}\n\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns the custom property value for the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @returns {*}\n\t */\n\tgetCustomProperty( key ) {\n\t\treturn this._customProperties.get( key );\n\t}\n\n\t/**\n\t * Returns an iterator which iterates over this element's custom properties.\n\t * Iterator provides `[ key, value ]` pairs for each stored property.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getCustomProperties() {\n\t\tyield* this._customProperties.entries();\n\t}\n\n\t/**\n\t * Returns identity string based on element's name, styles, classes and other attributes.\n\t * Two elements that {@link #isSimilar are similar} will have same identity string.\n\t * It has the following format:\n\t *\n\t *\t\t'name class=\"class1,class2\" style=\"style1:value1;style2:value2\" attr1=\"val1\" attr2=\"val2\"'\n \t *\n\t * For example:\n\t *\n\t *\t\tconst element = writer.createContainerElement( 'foo', {\n\t *\t\t\tbanana: '10',\n\t *\t\t\tapple: '20',\n\t *\t\t\tstyle: 'color: red; border-color: white;',\n\t *\t\t\tclass: 'baz'\n\t *\t\t} );\n\t *\n\t *\t\t// returns 'foo class=\"baz\" style=\"border-color:white;color:red\" apple=\"20\" banana=\"10\"'\n\t *\t\telement.getIdentity();\n\t *\n\t * NOTE: Classes, styles and other attributes are sorted alphabetically.\n\t *\n\t * @returns {String}\n\t */\n\tgetIdentity() {\n\t\tconst classes = Array.from( this._classes ).sort().join( ',' );\n\t\tconst styles = Array.from( this._styles ).map( i => `${ i[ 0 ] }:${ i[ 1 ] }` ).sort().join( ';' );\n\t\tconst attributes = Array.from( this._attrs ).map( i => `${ i[ 0 ] }=\"${ i[ 1 ] }\"` ).sort().join( ' ' );\n\n\t\treturn this.name +\n\t\t\t( classes == '' ? '' : ` class=\"${ classes }\"` ) +\n\t\t\t( styles == '' ? '' : ` style=\"${ styles }\"` ) +\n\t\t\t( attributes == '' ? '' : ` ${ attributes }` );\n\t}\n\n\t/**\n\t * Clones provided element.\n\t *\n\t * @protected\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/element~Element} Clone of this element.\n\t */\n\t_clone( deep = false ) {\n\t\tconst childrenClone = [];\n\n\t\tif ( deep ) {\n\t\t\tfor ( const child of this.getChildren() ) {\n\t\t\t\tchildrenClone.push( child._clone( deep ) );\n\t\t\t}\n\t\t}\n\n\t\t// ContainerElement and AttributeElement should be also cloned properly.\n\t\tconst cloned = new this.constructor( this.name, this._attrs, childrenClone );\n\n\t\t// Classes and styles are cloned separately - this solution is faster than adding them back to attributes and\n\t\t// parse once again in constructor.\n\t\tcloned._classes = new Set( this._classes );\n\t\tcloned._styles = new Map( this._styles );\n\n\t\t// Clone custom properties.\n\t\tcloned._customProperties = new Map( this._customProperties );\n\n\t\t// Clone filler offset method.\n\t\t// We can't define this method in a prototype because it's behavior which\n\t\t// is changed by e.g. toWidget() function from ckeditor5-widget. Perhaps this should be one of custom props.\n\t\tcloned.getFillerOffset = this.getFillerOffset;\n\n\t\treturn cloned;\n\t}\n\n\t/**\n\t * {@link module:engine/view/element~Element#_insertChild Insert} a child node or a list of child nodes at the end of this node\n\t * and sets the parent of these nodes to this element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#insert\n\t * @protected\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Number} Number of appended nodes.\n\t */\n\t_appendChild( items ) {\n\t\treturn this._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#insert\n\t * @protected\n\t * @param {Number} index Position where nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\t_insertChild( index, items ) {\n\t\tthis._fireChange( 'children', this );\n\t\tlet count = 0;\n\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\n\t\t\tthis._children.splice( index, 0, node );\n\t\t\tindex++;\n\t\t\tcount++;\n\t\t}\n\n\t\treturn count;\n\t}\n\n\t/**\n\t * Removes number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#remove\n\t * @protected\n\t * @param {Number} index Number of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Array.<module:engine/view/node~Node>} The array of removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tthis._fireChange( 'children', this );\n\n\t\tfor ( let i = index; i < index + howMany; i++ ) {\n\t\t\tthis._children[ i ].parent = null;\n\t\t}\n\n\t\treturn this._children.splice( index, howMany );\n\t}\n\n\t/**\n\t * Adds or overwrite attribute with a specified key and value.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setAttribute\n\t * @protected\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_setAttribute( key, value ) {\n\t\tvalue = String( value );\n\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( key == 'class' ) {\n\t\t\tparseClasses( this._classes, value );\n\t\t} else if ( key == 'style' ) {\n\t\t\tparseInlineStyles( this._styles, value );\n\t\t} else {\n\t\t\tthis._attrs.set( key, value );\n\t\t}\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeAttribute\n\t * @protected\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} Returns true if an attribute existed and has been removed.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeAttribute( key ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\t// Remove class attribute.\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\tthis._classes.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove style attribute.\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tthis._styles.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove other attributes.\n\t\treturn this._attrs.delete( key );\n\t}\n\n\t/**\n\t * Adds specified class.\n\t *\n\t *\t\telement._addClass( 'foo' ); // Adds 'foo' class.\n\t *\t\telement._addClass( [ 'foo', 'bar' ] ); // Adds 'foo' and 'bar' classes.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#addClass\n\t * @protected\n\t * @param {Array.<String>|String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_addClass( className ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tclassName = Array.isArray( className ) ? className : [ className ];\n\t\tclassName.forEach( name => this._classes.add( name ) );\n\t}\n\n\t/**\n\t * Removes specified class.\n\t *\n\t *\t\telement._removeClass( 'foo' ); // Removes 'foo' class.\n\t *\t\telement._removeClass( [ 'foo', 'bar' ] ); // Removes both 'foo' and 'bar' classes.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeClass\n\t * @protected\n\t * @param {Array.<String>|String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeClass( className ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tclassName = Array.isArray( className ) ? className : [ className ];\n\t\tclassName.forEach( name => this._classes.delete( name ) );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\telement._setStyle( 'color', 'red' );\n\t *\t\telement._setStyle( {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t} );\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setStyle\n\t * @protected\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_setStyle( property, value ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( isPlainObject( property ) ) {\n\t\t\tconst keys = Object.keys( property );\n\n\t\t\tfor ( const key of keys ) {\n\t\t\t\tthis._styles.set( key, property[ key ] );\n\t\t\t}\n\t\t} else {\n\t\t\tthis._styles.set( property, value );\n\t\t}\n\t}\n\n\t/**\n\t * Removes specified style.\n\t *\n\t *\t\telement._removeStyle( 'color' ); // Removes 'color' style.\n\t *\t\telement._removeStyle( [ 'color', 'border-top' ] ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeStyle\n\t * @protected\n\t * @param {Array.<String>|String} property\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeStyle( property ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tproperty = Array.isArray( property ) ? property : [ property ];\n\t\tproperty.forEach( name => this._styles.delete( name ) );\n\t}\n\n\t/**\n\t * Sets a custom property. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setCustomProperty\n\t * @protected\n\t * @param {String|Symbol} key\n\t * @param {*} value\n\t */\n\t_setCustomProperty( key, value ) {\n\t\tthis._customProperties.set( key, value );\n\t}\n\n\t/**\n\t * Removes the custom property stored under the given key.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeCustomProperty\n\t * @protected\n\t * @param {String|Symbol} key\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\t_removeCustomProperty( key ) {\n\t\treturn this._customProperties.delete( key );\n\t}\n\n\t/**\n\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t *\n\t * @abstract\n\t * @method module:engine/view/element~Element#getFillerOffset\n\t */\n\n\t// @if CK_DEBUG_ENGINE // printTree( level = 0) {\n\t// @if CK_DEBUG_ENGINE // \tlet string = '';\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\t'.repeat( level ) + `<${ this.name }${ convertMapToTags( this.getAttributes() ) }>`;\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + '\\t'.repeat( level + 1 ) + child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + child.printTree( level + 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tif ( this.childCount ) {\n\t// @if CK_DEBUG_ENGINE //\t\tstring += '\\n' + '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += `</${ this.name }>`;\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Parses attributes provided to the element constructor before they are applied to an element. If attributes are passed\n// as an object (instead of `Map`), the object is transformed to the map. Attributes with `null` value are removed.\n// Attributes with non-`String` value are converted to `String`.\n//\n// @param {Object|Map} attrs Attributes to parse.\n// @returns {Map} Parsed attributes.\nfunction parseAttributes( attrs ) {\n\tif ( isPlainObject( attrs ) ) {\n\t\tattrs = objectToMap( attrs );\n\t} else {\n\t\tattrs = new Map( attrs );\n\t}\n\n\tfor ( const [ key, value ] of attrs ) {\n\t\tif ( value === null ) {\n\t\t\tattrs.delete( key );\n\t\t} else if ( typeof value != 'string' ) {\n\t\t\tattrs.set( key, String( value ) );\n\t\t}\n\t}\n\n\treturn attrs;\n}\n\n// Parses inline styles and puts property - value pairs into styles map.\n// Styles map is cleared before insertion.\n//\n// @param {Map.<String, String>} stylesMap Map to insert parsed properties and values.\n// @param {String} stylesString Styles to parse.\nfunction parseInlineStyles( stylesMap, stylesString ) {\n\t// `null` if no quote was found in input string or last found quote was a closing quote. See below.\n\tlet quoteType = null;\n\tlet propertyNameStart = 0;\n\tlet propertyValueStart = 0;\n\tlet propertyName = null;\n\n\tstylesMap.clear();\n\n\t// Do not set anything if input string is empty.\n\tif ( stylesString === '' ) {\n\t\treturn;\n\t}\n\n\t// Fix inline styles that do not end with `;` so they are compatible with algorithm below.\n\tif ( stylesString.charAt( stylesString.length - 1 ) != ';' ) {\n\t\tstylesString = stylesString + ';';\n\t}\n\n\t// Seek the whole string for \"special characters\".\n\tfor ( let i = 0; i < stylesString.length; i++ ) {\n\t\tconst char = stylesString.charAt( i );\n\n\t\tif ( quoteType === null ) {\n\t\t\t// No quote found yet or last found quote was a closing quote.\n\t\t\tswitch ( char ) {\n\t\t\t\tcase ':':\n\t\t\t\t\t// Most of time colon means that property name just ended.\n\t\t\t\t\t// Sometimes however `:` is found inside property value (for example in background image url).\n\t\t\t\t\tif ( !propertyName ) {\n\t\t\t\t\t\t// Treat this as end of property only if property name is not already saved.\n\t\t\t\t\t\t// Save property name.\n\t\t\t\t\t\tpropertyName = stylesString.substr( propertyNameStart, i - propertyNameStart );\n\t\t\t\t\t\t// Save this point as the start of property value.\n\t\t\t\t\t\tpropertyValueStart = i + 1;\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase '\"':\n\t\t\t\tcase '\\'':\n\t\t\t\t\t// Opening quote found (this is an opening quote, because `quoteType` is `null`).\n\t\t\t\t\tquoteType = char;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ';': {\n\t\t\t\t\t// Property value just ended.\n\t\t\t\t\t// Use previously stored property value start to obtain property value.\n\t\t\t\t\tconst propertyValue = stylesString.substr( propertyValueStart, i - propertyValueStart );\n\n\t\t\t\t\tif ( propertyName ) {\n\t\t\t\t\t\t// Save parsed part.\n\t\t\t\t\t\tstylesMap.set( propertyName.trim(), propertyValue.trim() );\n\t\t\t\t\t}\n\n\t\t\t\t\tpropertyName = null;\n\n\t\t\t\t\t// Save this point as property name start. Property name starts immediately after previous property value ends.\n\t\t\t\t\tpropertyNameStart = i + 1;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else if ( char === quoteType ) {\n\t\t\t// If a quote char is found and it is a closing quote, mark this fact by `null`-ing `quoteType`.\n\t\t\tquoteType = null;\n\t\t}\n\t}\n}\n\n// Parses class attribute and puts all classes into classes set.\n// Classes set s cleared before insertion.\n//\n// @param {Set.<String>} classesSet Set to insert parsed classes.\n// @param {String} classesString String with classes to parse.\nfunction parseClasses( classesSet, classesString ) {\n\tconst classArray = classesString.split( /\\s+/ );\n\tclassesSet.clear();\n\tclassArray.forEach( name => classesSet.add( name ) );\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/view/item~Item|Iterable.<String|module:engine/view/item~Item>}\n// @returns {Iterable.<module:engine/view/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/containerelement\n */\n\nimport Element from './element';\n\n/**\n * Containers are elements which define document structure. They define boundaries for\n * {@link module:engine/view/attributeelement~AttributeElement attributes}. They are mostly used for block elements like `<p>` or `<div>`.\n *\n * Editing engine does not define a fixed HTML DTD. This is why a feature developer needs to choose between various\n * types (container element, {@link module:engine/view/attributeelement~AttributeElement attribute element},\n * {@link module:engine/view/emptyelement~EmptyElement empty element}, etc) when developing a feature.\n *\n * The container element should be your default choice when writing a converter, unless:\n *\n * * this element represents a model text attribute (then use {@link module:engine/view/attributeelement~AttributeElement}),\n * * this is an empty element like `<img>` (then use {@link module:engine/view/emptyelement~EmptyElement}),\n * * this is a root element,\n * * this is a nested editable element (then use {@link module:engine/view/editableelement~EditableElement}).\n *\n * To create a new container element instance use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createContainerElement `DowncastWriter#createContainerElement()`}\n * method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class ContainerElement extends Element {\n\t/**\n\t * Creates a container element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createContainerElement\n\t * @see module:engine/view/element~Element\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tcontainerElement.is( 'containerElement' ); // -> true\n\t *\t\tcontainerElement.is( 'element' ); // -> true\n\t *\t\tcontainerElement.is( 'node' ); // -> true\n\t *\t\tcontainerElement.is( 'view:containerElement' ); // -> true\n\t *\t\tcontainerElement.is( 'view:element' ); // -> true\n\t *\t\tcontainerElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tcontainerElement.is( 'model:element' ); // -> false\n\t *\t\tcontainerElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is a container element, you can also check its\n\t * {@link module:engine/view/containerelement~ContainerElement#name name}:\n\t *\n\t *\t\tcontainerElement.is( 'div' ); // -> true if this is a div container element\n\t *\t\tcontainerElement.is( 'contaienrElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'containerElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'containerElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n}\n\n/**\n * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n *\n * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n */\nexport function getFillerOffset() {\n\tconst children = [ ...this.getChildren() ];\n\tconst lastChild = children[ this.childCount - 1 ];\n\n\t// Block filler is required after a `<br>` if it's the last element in its container. See #1422.\n\tif ( lastChild && lastChild.is( 'element', 'br' ) ) {\n\t\treturn this.childCount;\n\t}\n\n\tfor ( const child of children ) {\n\t\t// If there's any non-UI element – don't render the bogus.\n\t\tif ( !child.is( 'uiElement' ) ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// If there are only UI elements – render the bogus at the end of the element.\n\treturn this.childCount;\n}\n","/**\n * This method returns the first argument it receives.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Util\n * @param {*} value Any value.\n * @returns {*} Returns `value`.\n * @example\n *\n * var object = { 'a': 1 };\n *\n * console.log(_.identity(object) === object);\n * // => true\n */\nfunction identity(value) {\n return value;\n}\n\nexport default identity;\n","/**\n * A faster alternative to `Function#apply`, this function invokes `func`\n * with the `this` binding of `thisArg` and the arguments of `args`.\n *\n * @private\n * @param {Function} func The function to invoke.\n * @param {*} thisArg The `this` binding of `func`.\n * @param {Array} args The arguments to invoke `func` with.\n * @returns {*} Returns the result of `func`.\n */\nfunction apply(func, thisArg, args) {\n switch (args.length) {\n case 0: return func.call(thisArg);\n case 1: return func.call(thisArg, args[0]);\n case 2: return func.call(thisArg, args[0], args[1]);\n case 3: return func.call(thisArg, args[0], args[1], args[2]);\n }\n return func.apply(thisArg, args);\n}\n\nexport default apply;\n","import apply from './_apply.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max;\n\n/**\n * A specialized version of `baseRest` which transforms the rest array.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @param {Function} transform The rest array transform.\n * @returns {Function} Returns the new function.\n */\nfunction overRest(func, start, transform) {\n start = nativeMax(start === undefined ? (func.length - 1) : start, 0);\n return function() {\n var args = arguments,\n index = -1,\n length = nativeMax(args.length - start, 0),\n array = Array(length);\n\n while (++index < length) {\n array[index] = args[start + index];\n }\n index = -1;\n var otherArgs = Array(start + 1);\n while (++index < start) {\n otherArgs[index] = args[index];\n }\n otherArgs[start] = transform(array);\n return apply(func, this, otherArgs);\n };\n}\n\nexport default overRest;\n","/**\n * Creates a function that returns `value`.\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Util\n * @param {*} value The value to return from the new function.\n * @returns {Function} Returns the new constant function.\n * @example\n *\n * var objects = _.times(2, _.constant({ 'a': 1 }));\n *\n * console.log(objects);\n * // => [{ 'a': 1 }, { 'a': 1 }]\n *\n * console.log(objects[0] === objects[1]);\n * // => true\n */\nfunction constant(value) {\n return function() {\n return value;\n };\n}\n\nexport default constant;\n","import constant from './constant.js';\nimport defineProperty from './_defineProperty.js';\nimport identity from './identity.js';\n\n/**\n * The base implementation of `setToString` without support for hot loop shorting.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\nvar baseSetToString = !defineProperty ? identity : function(func, string) {\n return defineProperty(func, 'toString', {\n 'configurable': true,\n 'enumerable': false,\n 'value': constant(string),\n 'writable': true\n });\n};\n\nexport default baseSetToString;\n","/** Used to detect hot functions by number of calls within a span of milliseconds. */\nvar HOT_COUNT = 800,\n HOT_SPAN = 16;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeNow = Date.now;\n\n/**\n * Creates a function that'll short out and invoke `identity` instead\n * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`\n * milliseconds.\n *\n * @private\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new shortable function.\n */\nfunction shortOut(func) {\n var count = 0,\n lastCalled = 0;\n\n return function() {\n var stamp = nativeNow(),\n remaining = HOT_SPAN - (stamp - lastCalled);\n\n lastCalled = stamp;\n if (remaining > 0) {\n if (++count >= HOT_COUNT) {\n return arguments[0];\n }\n } else {\n count = 0;\n }\n return func.apply(undefined, arguments);\n };\n}\n\nexport default shortOut;\n","import baseSetToString from './_baseSetToString.js';\nimport shortOut from './_shortOut.js';\n\n/**\n * Sets the `toString` method of `func` to return `string`.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\nvar setToString = shortOut(baseSetToString);\n\nexport default setToString;\n","import identity from './identity.js';\nimport overRest from './_overRest.js';\nimport setToString from './_setToString.js';\n\n/**\n * The base implementation of `_.rest` which doesn't validate or coerce arguments.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @returns {Function} Returns the new function.\n */\nfunction baseRest(func, start) {\n return setToString(overRest(func, start, identity), func + '');\n}\n\nexport default baseRest;\n","import copyObject from './_copyObject.js';\nimport createAssigner from './_createAssigner.js';\nimport keysIn from './keysIn.js';\n\n/**\n * This method is like `_.assign` except that it iterates over own and\n * inherited source properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extend\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assign\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assignIn({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }\n */\nvar assignIn = createAssigner(function(object, source) {\n copyObject(source, keysIn(source), object);\n});\n\nexport default assignIn;\n","import baseRest from './_baseRest.js';\nimport isIterateeCall from './_isIterateeCall.js';\n\n/**\n * Creates a function like `_.assign`.\n *\n * @private\n * @param {Function} assigner The function to assign values.\n * @returns {Function} Returns the new assigner function.\n */\nfunction createAssigner(assigner) {\n return baseRest(function(object, sources) {\n var index = -1,\n length = sources.length,\n customizer = length > 1 ? sources[length - 1] : undefined,\n guard = length > 2 ? sources[2] : undefined;\n\n customizer = (assigner.length > 3 && typeof customizer == 'function')\n ? (length--, customizer)\n : undefined;\n\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n customizer = length < 3 ? undefined : customizer;\n length = 1;\n }\n object = Object(object);\n while (++index < length) {\n var source = sources[index];\n if (source) {\n assigner(object, source, index, customizer);\n }\n }\n return object;\n });\n}\n\nexport default createAssigner;\n","import eq from './eq.js';\nimport isArrayLike from './isArrayLike.js';\nimport isIndex from './_isIndex.js';\nimport isObject from './isObject.js';\n\n/**\n * Checks if the given arguments are from an iteratee call.\n *\n * @private\n * @param {*} value The potential iteratee value argument.\n * @param {*} index The potential iteratee index or key argument.\n * @param {*} object The potential iteratee object argument.\n * @returns {boolean} Returns `true` if the arguments are from an iteratee call,\n * else `false`.\n */\nfunction isIterateeCall(value, index, object) {\n if (!isObject(object)) {\n return false;\n }\n var type = typeof index;\n if (type == 'number'\n ? (isArrayLike(object) && isIndex(index, object.length))\n : (type == 'string' && index in object)\n ) {\n return eq(object[index], value);\n }\n return false;\n}\n\nexport default isIterateeCall;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/observablemixin\n */\n\nimport EmitterMixin from './emittermixin';\nimport CKEditorError from './ckeditorerror';\nimport { extend, isObject } from 'lodash-es';\n\nconst observablePropertiesSymbol = Symbol( 'observableProperties' );\nconst boundObservablesSymbol = Symbol( 'boundObservables' );\nconst boundPropertiesSymbol = Symbol( 'boundProperties' );\n\n/**\n * Mixin that injects the \"observable properties\" and data binding functionality described in the\n * {@link ~Observable} interface.\n *\n * Read more about the concept of observables in the:\n * * {@glink framework/guides/architecture/core-editor-architecture#event-system-and-observables \"Event system and observables\"}\n * section of the {@glink framework/guides/architecture/core-editor-architecture \"Core editor architecture\"} guide,\n * * {@glink framework/guides/deep-dive/observables \"Observables\" deep dive} guide.\n *\n * @mixin ObservableMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/observablemixin~Observable\n */\nconst ObservableMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tset( name, value ) {\n\t\t// If the first parameter is an Object, iterate over its properties.\n\t\tif ( isObject( name ) ) {\n\t\t\tObject.keys( name ).forEach( property => {\n\t\t\t\tthis.set( property, name[ property ] );\n\t\t\t}, this );\n\n\t\t\treturn;\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst properties = this[ observablePropertiesSymbol ];\n\n\t\tif ( ( name in this ) && !properties.has( name ) ) {\n\t\t\t/**\n\t\t\t * Cannot override an existing property.\n\t\t\t *\n\t\t\t * This error is thrown when trying to {@link ~Observable#set set} an property with\n\t\t\t * a name of an already existing property. For example:\n\t\t\t *\n\t\t\t *\t\tlet observable = new Model();\n\t\t\t *\t\tobservable.property = 1;\n\t\t\t *\t\tobservable.set( 'property', 2 );\t\t\t// throws\n\t\t\t *\n\t\t\t *\t\tobservable.set( 'property', 1 );\n\t\t\t *\t\tobservable.set( 'property', 2 );\t\t\t// ok, because this is an existing property.\n\t\t\t *\n\t\t\t * @error observable-set-cannot-override\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-set-cannot-override: Cannot override an existing property.', this );\n\t\t}\n\n\t\tObject.defineProperty( this, name, {\n\t\t\tenumerable: true,\n\t\t\tconfigurable: true,\n\n\t\t\tget() {\n\t\t\t\treturn properties.get( name );\n\t\t\t},\n\n\t\t\tset( value ) {\n\t\t\t\tconst oldValue = properties.get( name );\n\n\t\t\t\t// Fire `set` event before the new value will be set to make it possible\n\t\t\t\t// to override observable property without affecting `change` event.\n\t\t\t\t// See https://github.com/ckeditor/ckeditor5-utils/issues/171.\n\t\t\t\tlet newValue = this.fire( 'set:' + name, name, value, oldValue );\n\n\t\t\t\tif ( newValue === undefined ) {\n\t\t\t\t\tnewValue = value;\n\t\t\t\t}\n\n\t\t\t\t// Allow undefined as an initial value like A.define( 'x', undefined ) (#132).\n\t\t\t\t// Note: When properties map has no such own property, then its value is undefined.\n\t\t\t\tif ( oldValue !== newValue || !properties.has( name ) ) {\n\t\t\t\t\tproperties.set( name, newValue );\n\t\t\t\t\tthis.fire( 'change:' + name, name, newValue, oldValue );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\n\t\tthis[ name ] = value;\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tbind( ...bindProperties ) {\n\t\tif ( !bindProperties.length || !isStringArray( bindProperties ) ) {\n\t\t\t/**\n\t\t\t * All properties must be strings.\n\t\t\t *\n\t\t\t * @error observable-bind-wrong-properties\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-wrong-properties: All properties must be strings.', this );\n\t\t}\n\n\t\tif ( ( new Set( bindProperties ) ).size !== bindProperties.length ) {\n\t\t\t/**\n\t\t\t * Properties must be unique.\n\t\t\t *\n\t\t\t * @error observable-bind-duplicate-properties\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-duplicate-properties: Properties must be unique.', this );\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst boundProperties = this[ boundPropertiesSymbol ];\n\n\t\tbindProperties.forEach( propertyName => {\n\t\t\tif ( boundProperties.has( propertyName ) ) {\n\t\t\t\t/**\n\t\t\t\t * Cannot bind the same property more than once.\n\t\t\t\t *\n\t\t\t\t * @error observable-bind-rebind\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-bind-rebind: Cannot bind the same property more than once.', this );\n\t\t\t}\n\t\t} );\n\n\t\tconst bindings = new Map();\n\n\t\t// @typedef {Object} Binding\n\t\t// @property {Array} property Property which is bound.\n\t\t// @property {Array} to Array of observable–property components of the binding (`{ observable: ..., property: .. }`).\n\t\t// @property {Array} callback A function which processes `to` components.\n\t\tbindProperties.forEach( a => {\n\t\t\tconst binding = { property: a, to: [] };\n\n\t\t\tboundProperties.set( a, binding );\n\t\t\tbindings.set( a, binding );\n\t\t} );\n\n\t\t// @typedef {Object} BindChain\n\t\t// @property {Function} to See {@link ~ObservableMixin#_bindTo}.\n\t\t// @property {Function} toMany See {@link ~ObservableMixin#_bindToMany}.\n\t\t// @property {module:utils/observablemixin~Observable} _observable The observable which initializes the binding.\n\t\t// @property {Array} _bindProperties Array of `_observable` properties to be bound.\n\t\t// @property {Array} _to Array of `to()` observable–properties (`{ observable: toObservable, properties: ...toProperties }`).\n\t\t// @property {Map} _bindings Stores bindings to be kept in\n\t\t// {@link ~ObservableMixin#_boundProperties}/{@link ~ObservableMixin#_boundObservables}\n\t\t// initiated in this binding chain.\n\t\treturn {\n\t\t\tto: bindTo,\n\t\t\ttoMany: bindToMany,\n\n\t\t\t_observable: this,\n\t\t\t_bindProperties: bindProperties,\n\t\t\t_to: [],\n\t\t\t_bindings: bindings\n\t\t};\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tunbind( ...unbindProperties ) {\n\t\t// Nothing to do here if not inited yet.\n\t\tif ( !( observablePropertiesSymbol in this ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst boundProperties = this[ boundPropertiesSymbol ];\n\t\tconst boundObservables = this[ boundObservablesSymbol ];\n\n\t\tif ( unbindProperties.length ) {\n\t\t\tif ( !isStringArray( unbindProperties ) ) {\n\t\t\t\t/**\n\t\t\t\t * Properties must be strings.\n\t\t\t\t *\n\t\t\t\t * @error observable-unbind-wrong-properties\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-unbind-wrong-properties: Properties must be strings.', this );\n\t\t\t}\n\n\t\t\tunbindProperties.forEach( propertyName => {\n\t\t\t\tconst binding = boundProperties.get( propertyName );\n\n\t\t\t\t// Nothing to do if the binding is not defined\n\t\t\t\tif ( !binding ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tlet toObservable, toProperty, toProperties, toPropertyBindings;\n\n\t\t\t\tbinding.to.forEach( to => {\n\t\t\t\t\t// TODO: ES6 destructuring.\n\t\t\t\t\ttoObservable = to[ 0 ];\n\t\t\t\t\ttoProperty = to[ 1 ];\n\t\t\t\t\ttoProperties = boundObservables.get( toObservable );\n\t\t\t\t\ttoPropertyBindings = toProperties[ toProperty ];\n\n\t\t\t\t\ttoPropertyBindings.delete( binding );\n\n\t\t\t\t\tif ( !toPropertyBindings.size ) {\n\t\t\t\t\t\tdelete toProperties[ toProperty ];\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( !Object.keys( toProperties ).length ) {\n\t\t\t\t\t\tboundObservables.delete( toObservable );\n\t\t\t\t\t\tthis.stopListening( toObservable, 'change' );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t\tboundProperties.delete( propertyName );\n\t\t\t} );\n\t\t} else {\n\t\t\tboundObservables.forEach( ( bindings, boundObservable ) => {\n\t\t\t\tthis.stopListening( boundObservable, 'change' );\n\t\t\t} );\n\n\t\t\tboundObservables.clear();\n\t\t\tboundProperties.clear();\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdecorate( methodName ) {\n\t\tconst originalMethod = this[ methodName ];\n\n\t\tif ( !originalMethod ) {\n\t\t\t/**\n\t\t\t * Cannot decorate an undefined method.\n\t\t\t *\n\t\t\t * @error observablemixin-cannot-decorate-undefined\n\t\t\t * @param {Object} object The object which method should be decorated.\n\t\t\t * @param {String} methodName Name of the method which does not exist.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'observablemixin-cannot-decorate-undefined: Cannot decorate an undefined method.',\n\t\t\t\tthis,\n\t\t\t\t{ object: this, methodName }\n\t\t\t);\n\t\t}\n\n\t\tthis.on( methodName, ( evt, args ) => {\n\t\t\tevt.return = originalMethod.apply( this, args );\n\t\t} );\n\n\t\tthis[ methodName ] = function( ...args ) {\n\t\t\treturn this.fire( methodName, args );\n\t\t};\n\t}\n};\n\nextend( ObservableMixin, EmitterMixin );\n\nexport default ObservableMixin;\n\n// Init symbol properties needed to for the observable mechanism to work.\n//\n// @private\n// @param {module:utils/observablemixin~ObservableMixin} observable\nfunction initObservable( observable ) {\n\t// Do nothing if already inited.\n\tif ( observablePropertiesSymbol in observable ) {\n\t\treturn;\n\t}\n\n\t// The internal hash containing the observable's state.\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, observablePropertiesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Map containing bindings to external observables. It shares the binding objects\n\t// (`{ observable: A, property: 'a', to: ... }`) with {@link module:utils/observablemixin~ObservableMixin#_boundProperties} and\n\t// it is used to observe external observables to update own properties accordingly.\n\t// See {@link module:utils/observablemixin~ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\tz: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t},\n\t//\t\t\t\tC: {\n\t//\t\t\t\t\tw: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundObservablesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Object that stores which properties of this observable are bound and how. It shares\n\t// the binding objects (`{ observable: A, property: 'a', to: ... }`) with\n\t// {@link module:utils/observablemixin~ObservableMixin#_boundObservables}. This data structure is\n\t// a reverse of {@link module:utils/observablemixin~ObservableMixin#_boundObservables} and it is helpful for\n\t// {@link module:utils/observablemixin~ObservableMixin#unbind}.\n\t//\n\t// See {@link module:utils/observablemixin~ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundProperties );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundProperties );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, property: 'c', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\td: { observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundPropertiesSymbol, {\n\t\tvalue: new Map()\n\t} );\n}\n\n// A chaining for {@link module:utils/observablemixin~ObservableMixin#bind} providing `.to()` interface.\n//\n// @private\n// @param {...[Observable|String|Function]} args Arguments of the `.to( args )` binding.\nfunction bindTo( ...args ) {\n\tconst parsedArgs = parseBindToArgs( ...args );\n\tconst bindingsKeys = Array.from( this._bindings.keys() );\n\tconst numberOfBindings = bindingsKeys.length;\n\n\t// Eliminate A.bind( 'x' ).to( B, C )\n\tif ( !parsedArgs.callback && parsedArgs.to.length > 1 ) {\n\t\t/**\n\t\t * Binding multiple observables only possible with callback.\n\t\t *\n\t\t * @error observable-bind-no-callback\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'observable-bind-to-no-callback: Binding multiple observables only possible with callback.',\n\t\t\tthis\n\t\t);\n\t}\n\n\t// Eliminate A.bind( 'x', 'y' ).to( B, callback )\n\tif ( numberOfBindings > 1 && parsedArgs.callback ) {\n\t\t/**\n\t\t * Cannot bind multiple properties and use a callback in one binding.\n\t\t *\n\t\t * @error observable-bind-to-extra-callback\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'observable-bind-to-extra-callback: Cannot bind multiple properties and use a callback in one binding.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tparsedArgs.to.forEach( to => {\n\t\t// Eliminate A.bind( 'x', 'y' ).to( B, 'a' )\n\t\tif ( to.properties.length && to.properties.length !== numberOfBindings ) {\n\t\t\t/**\n\t\t\t * The number of properties must match.\n\t\t\t *\n\t\t\t * @error observable-bind-to-properties-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-to-properties-length: The number of properties must match.', this );\n\t\t}\n\n\t\t// When no to.properties specified, observing source properties instead i.e.\n\t\t// A.bind( 'x', 'y' ).to( B ) -> Observe B.x and B.y\n\t\tif ( !to.properties.length ) {\n\t\t\tto.properties = this._bindProperties;\n\t\t}\n\t} );\n\n\tthis._to = parsedArgs.to;\n\n\t// Fill {@link BindChain#_bindings} with callback. When the callback is set there's only one binding.\n\tif ( parsedArgs.callback ) {\n\t\tthis._bindings.get( bindingsKeys[ 0 ] ).callback = parsedArgs.callback;\n\t}\n\n\tattachBindToListeners( this._observable, this._to );\n\n\t// Update observable._boundProperties and observable._boundObservables.\n\tupdateBindToBound( this );\n\n\t// Set initial values of bound properties.\n\tthis._bindProperties.forEach( propertyName => {\n\t\tupdateBoundObservableProperty( this._observable, propertyName );\n\t} );\n}\n\n// Binds to an attribute in a set of iterable observables.\n//\n// @private\n// @param {Array.<Observable>} observables\n// @param {String} attribute\n// @param {Function} callback\nfunction bindToMany( observables, attribute, callback ) {\n\tif ( this._bindings.size > 1 ) {\n\t\t/**\n\t\t * Binding one attribute to many observables only possible with one attribute.\n\t\t *\n\t\t * @error observable-bind-to-many-not-one-binding\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-many-not-one-binding: Cannot bind multiple properties with toMany().', this );\n\t}\n\n\tthis.to(\n\t\t// Bind to #attribute of each observable...\n\t\t...getBindingTargets( observables, attribute ),\n\t\t// ...using given callback to parse attribute values.\n\t\tcallback\n\t);\n}\n\n// Returns an array of binding components for\n// {@link Observable#bind} from a set of iterable observables.\n//\n// @param {Array.<Observable>} observables\n// @param {String} attribute\n// @returns {Array.<String|Observable>}\nfunction getBindingTargets( observables, attribute ) {\n\tconst observableAndAttributePairs = observables.map( observable => [ observable, attribute ] );\n\n\t// Merge pairs to one-dimension array of observables and attributes.\n\treturn Array.prototype.concat.apply( [], observableAndAttributePairs );\n}\n\n// Check if all entries of the array are of `String` type.\n//\n// @private\n// @param {Array} arr An array to be checked.\n// @returns {Boolean}\nfunction isStringArray( arr ) {\n\treturn arr.every( a => typeof a == 'string' );\n}\n\n// Parses and validates {@link Observable#bind}`.to( args )` arguments and returns\n// an object with a parsed structure. For example\n//\n//\t\tA.bind( 'x' ).to( B, 'a', C, 'b', call );\n//\n// becomes\n//\n//\t\t{\n//\t\t\tto: [\n//\t\t\t\t{ observable: B, properties: [ 'a' ] },\n//\t\t\t\t{ observable: C, properties: [ 'b' ] },\n//\t\t\t],\n//\t\t\tcallback: call\n// \t\t}\n//\n// @private\n// @param {...*} args Arguments of {@link Observable#bind}`.to( args )`.\n// @returns {Object}\nfunction parseBindToArgs( ...args ) {\n\t// Eliminate A.bind( 'x' ).to()\n\tif ( !args.length ) {\n\t\t/**\n\t\t * Invalid argument syntax in `to()`.\n\t\t *\n\t\t * @error observable-bind-to-parse-error\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.', null );\n\t}\n\n\tconst parsed = { to: [] };\n\tlet lastObservable;\n\n\tif ( typeof args[ args.length - 1 ] == 'function' ) {\n\t\tparsed.callback = args.pop();\n\t}\n\n\targs.forEach( a => {\n\t\tif ( typeof a == 'string' ) {\n\t\t\tlastObservable.properties.push( a );\n\t\t} else if ( typeof a == 'object' ) {\n\t\t\tlastObservable = { observable: a, properties: [] };\n\t\t\tparsed.to.push( lastObservable );\n\t\t} else {\n\t\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.', null );\n\t\t}\n\t} );\n\n\treturn parsed;\n}\n\n// Synchronizes {@link module:utils/observablemixin#_boundObservables} with {@link Binding}.\n//\n// @private\n// @param {Binding} binding A binding to store in {@link Observable#_boundObservables}.\n// @param {Observable} toObservable A observable, which is a new component of `binding`.\n// @param {String} toPropertyName A name of `toObservable`'s property, a new component of the `binding`.\nfunction updateBoundObservables( observable, binding, toObservable, toPropertyName ) {\n\tconst boundObservables = observable[ boundObservablesSymbol ];\n\tconst bindingsToObservable = boundObservables.get( toObservable );\n\tconst bindings = bindingsToObservable || {};\n\n\tif ( !bindings[ toPropertyName ] ) {\n\t\tbindings[ toPropertyName ] = new Set();\n\t}\n\n\t// Pass the binding to a corresponding Set in `observable._boundObservables`.\n\tbindings[ toPropertyName ].add( binding );\n\n\tif ( !bindingsToObservable ) {\n\t\tboundObservables.set( toObservable, bindings );\n\t}\n}\n\n// Synchronizes {@link Observable#_boundProperties} and {@link Observable#_boundObservables}\n// with {@link BindChain}.\n//\n// Assuming the following binding being created\n//\n// \t\tA.bind( 'a', 'b' ).to( B, 'x', 'y' );\n//\n// the following bindings were initialized by {@link Observable#bind} in {@link BindChain#_bindings}:\n//\n// \t\t{\n// \t\t\ta: { observable: A, property: 'a', to: [] },\n// \t\t\tb: { observable: A, property: 'b', to: [] },\n// \t\t}\n//\n// Iterate over all bindings in this chain and fill their `to` properties with\n// corresponding to( ... ) arguments (components of the binding), so\n//\n// \t\t{\n// \t\t\ta: { observable: A, property: 'a', to: [ B, 'x' ] },\n// \t\t\tb: { observable: A, property: 'b', to: [ B, 'y' ] },\n// \t\t}\n//\n// Then update the structure of {@link Observable#_boundObservables} with updated\n// binding, so it becomes:\n//\n// \t\tMap( {\n// \t\t\tB: {\n// \t\t\t\tx: Set( [\n// \t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] }\n// \t\t\t\t] ),\n// \t\t\t\ty: Set( [\n// \t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n// \t\t\t\t] )\n//\t\t\t}\n// \t\t} )\n//\n// @private\n// @param {BindChain} chain The binding initialized by {@link Observable#bind}.\nfunction updateBindToBound( chain ) {\n\tlet toProperty;\n\n\tchain._bindings.forEach( ( binding, propertyName ) => {\n\t\t// Note: For a binding without a callback, this will run only once\n\t\t// like in A.bind( 'x', 'y' ).to( B, 'a', 'b' )\n\t\t// TODO: ES6 destructuring.\n\t\tchain._to.forEach( to => {\n\t\t\ttoProperty = to.properties[ binding.callback ? 0 : chain._bindProperties.indexOf( propertyName ) ];\n\n\t\t\tbinding.to.push( [ to.observable, toProperty ] );\n\t\t\tupdateBoundObservables( chain._observable, binding, to.observable, toProperty );\n\t\t} );\n\t} );\n}\n\n// Updates an property of a {@link Observable} with a value\n// determined by an entry in {@link Observable#_boundProperties}.\n//\n// @private\n// @param {Observable} observable A observable which property is to be updated.\n// @param {String} propertyName An property to be updated.\nfunction updateBoundObservableProperty( observable, propertyName ) {\n\tconst boundProperties = observable[ boundPropertiesSymbol ];\n\tconst binding = boundProperties.get( propertyName );\n\tlet propertyValue;\n\n\t// When a binding with callback is created like\n\t//\n\t// \t\tA.bind( 'a' ).to( B, 'b', C, 'c', callback );\n\t//\n\t// collect B.b and C.c, then pass them to callback to set A.a.\n\tif ( binding.callback ) {\n\t\tpropertyValue = binding.callback.apply( observable, binding.to.map( to => to[ 0 ][ to[ 1 ] ] ) );\n\t} else {\n\t\tpropertyValue = binding.to[ 0 ];\n\t\tpropertyValue = propertyValue[ 0 ][ propertyValue[ 1 ] ];\n\t}\n\n\tif ( observable.hasOwnProperty( propertyName ) ) {\n\t\tobservable[ propertyName ] = propertyValue;\n\t} else {\n\t\tobservable.set( propertyName, propertyValue );\n\t}\n}\n\n// Starts listening to changes in {@link BindChain._to} observables to update\n// {@link BindChain._observable} {@link BindChain._bindProperties}. Also sets the\n// initial state of {@link BindChain._observable}.\n//\n// @private\n// @param {BindChain} chain The chain initialized by {@link Observable#bind}.\nfunction attachBindToListeners( observable, toBindings ) {\n\ttoBindings.forEach( to => {\n\t\tconst boundObservables = observable[ boundObservablesSymbol ];\n\t\tlet bindings;\n\n\t\t// If there's already a chain between the observables (`observable` listens to\n\t\t// `to.observable`), there's no need to create another `change` event listener.\n\t\tif ( !boundObservables.get( to.observable ) ) {\n\t\t\tobservable.listenTo( to.observable, 'change', ( evt, propertyName ) => {\n\t\t\t\tbindings = boundObservables.get( to.observable )[ propertyName ];\n\n\t\t\t\t// Note: to.observable will fire for any property change, react\n\t\t\t\t// to changes of properties which are bound only.\n\t\t\t\tif ( bindings ) {\n\t\t\t\t\tbindings.forEach( binding => {\n\t\t\t\t\t\tupdateBoundObservableProperty( observable, binding.property );\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t} );\n}\n\n/**\n * Interface which adds \"observable properties\" and data binding functionality.\n *\n * Can be easily implemented by a class by mixing the {@link module:utils/observablemixin~ObservableMixin} mixin.\n *\n * Read more about the usage of this interface in the:\n * * {@glink framework/guides/architecture/core-editor-architecture#event-system-and-observables \"Event system and observables\"}\n * section of the {@glink framework/guides/architecture/core-editor-architecture \"Core editor architecture\"} guide,\n * * {@glink framework/guides/deep-dive/observables \"Observables\" deep dive} guide.\n *\n * @interface Observable\n * @extends module:utils/emittermixin~Emitter\n */\n\n/**\n * Fired when a property changed value.\n *\n *\t\tobservable.set( 'prop', 1 );\n *\n *\t\tobservable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `${ propertyName } has changed from ${ oldValue } to ${ newValue }` );\n *\t\t} );\n *\n *\t\tobservable.prop = 2; // -> 'prop has changed from 1 to 2'\n *\n * @event change:{property}\n * @param {String} name The property name.\n * @param {*} value The new property value.\n * @param {*} oldValue The previous property value.\n */\n\n/**\n * Fired when a property value is going to be set but is not set yet (before the `change` event is fired).\n *\n * You can control the final value of the property by using\n * the {@link module:utils/eventinfo~EventInfo#return event's `return` property}.\n *\n *\t\tobservable.set( 'prop', 1 );\n *\n *\t\tobservable.on( 'set:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `Value is going to be changed from ${ oldValue } to ${ newValue }` );\n *\t\t\tconsole.log( `Current property value is ${ observable[ propertyName ] }` );\n *\n *\t\t\t// Let's override the value.\n *\t\t\tevt.return = 3;\n *\t\t} );\n *\n *\t\tobservable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `Value has changed from ${ oldValue } to ${ newValue }` );\n *\t\t} );\n *\n *\t\tobservable.prop = 2; // -> 'Value is going to be changed from 1 to 2'\n *\t\t // -> 'Current property value is 1'\n *\t\t // -> 'Value has changed from 1 to 3'\n *\n * **Note:** Event is fired even when the new value is the same as the old value.\n *\n * @event set:{property}\n * @param {String} name The property name.\n * @param {*} value The new property value.\n * @param {*} oldValue The previous property value.\n */\n\n/**\n * Creates and sets the value of an observable property of this object. Such an property becomes a part\n * of the state and is be observable.\n *\n * It accepts also a single object literal containing key/value pairs with properties to be set.\n *\n * This method throws the `observable-set-cannot-override` error if the observable instance already\n * have a property with the given property name. This prevents from mistakenly overriding existing\n * properties and methods, but means that `foo.set( 'bar', 1 )` may be slightly slower than `foo.bar = 1`.\n *\n * @method #set\n * @param {String|Object} name The property's name or object with `name=>value` pairs.\n * @param {*} [value] The property's value (if `name` was passed in the first parameter).\n */\n\n/**\n * Binds {@link #set observable properties} to other objects implementing the\n * {@link module:utils/observablemixin~Observable} interface.\n *\n * Read more in the {@glink framework/guides/deep-dive/observables#property-bindings dedicated guide}\n * covering the topic of property bindings with some additional examples.\n *\n * Consider two objects: a `button` and an associated `command` (both `Observable`).\n *\n * A simple property binding could be as follows:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isEnabled' );\n *\n * or even shorter:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command );\n *\n * which works in the following way:\n *\n * * `button.isEnabled` **instantly equals** `command.isEnabled`,\n * * whenever `command.isEnabled` changes, `button.isEnabled` will immediately reflect its value.\n *\n * **Note**: To release the binding, use {@link module:utils/observablemixin~Observable#unbind}.\n *\n * You can also \"rename\" the property in the binding by specifying the new name in the `to()` chain:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isWorking' );\n *\n * It is possible to bind more than one property at a time to shorten the code:\n *\n *\t\tbutton.bind( 'isEnabled', 'value' ).to( command );\n *\n * which corresponds to:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command );\n *\t\tbutton.bind( 'value' ).to( command );\n *\n * The binding can include more than one observable, combining multiple data sources in a custom callback:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isEnabled', ui, 'isVisible',\n *\t\t\t( isCommandEnabled, isUIVisible ) => isCommandEnabled && isUIVisible );\n *\n * It is also possible to bind to the same property in an array of observables.\n * To bind a `button` to multiple commands (also `Observables`) so that each and every one of them\n * must be enabled for the button to become enabled, use the following code:\n *\n *\t\tbutton.bind( 'isEnabled' ).toMany( [ commandA, commandB, commandC ], 'isEnabled',\n *\t\t\t( isAEnabled, isBEnabled, isCEnabled ) => isAEnabled && isBEnabled && isCEnabled );\n *\n * @method #bind\n * @param {...String} bindProperties Observable properties that will be bound to other observable(s).\n * @returns {Object} The bind chain with the `to()` and `toMany()` methods.\n */\n\n/**\n * Removes the binding created with {@link #bind}.\n *\n *\t\t// Removes the binding for the 'a' property.\n *\t\tA.unbind( 'a' );\n *\n *\t\t// Removes bindings for all properties.\n *\t\tA.unbind();\n *\n * @method #unbind\n * @param {...String} [unbindProperties] Observable properties to be unbound. All the bindings will\n * be released if no properties are provided.\n */\n\n/**\n * Turns the given methods of this object into event-based ones. This means that the new method will fire an event\n * (named after the method) and the original action will be plugged as a listener to that event.\n *\n * Read more in the {@glink framework/guides/deep-dive/observables#decorating-object-methods dedicated guide}\n * covering the topic of decorating methods with some additional examples.\n *\n * Decorating the method does not change its behavior (it only adds an event),\n * but it allows to modify it later on by listening to the method's event.\n *\n * For example, to cancel the method execution the event can be {@link module:utils/eventinfo~EventInfo#stop stopped}:\n *\n *\t\tclass Foo {\n *\t\t\tconstructor() {\n *\t\t\t\tthis.decorate( 'method' );\n *\t\t\t}\n *\n *\t\t\tmethod() {\n *\t\t\t\tconsole.log( 'called!' );\n *\t\t\t}\n *\t\t}\n *\n *\t\tconst foo = new Foo();\n *\t\tfoo.on( 'method', ( evt ) => {\n *\t\t\tevt.stop();\n *\t\t}, { priority: 'high' } );\n *\n *\t\tfoo.method(); // Nothing is logged.\n *\n *\n * **Note**: The high {@link module:utils/priorities~PriorityString priority} listener\n * has been used to execute this particular callback before the one which calls the original method\n * (which uses the \"normal\" priority).\n *\n * It is also possible to change the returned value:\n *\n *\t\tfoo.on( 'method', ( evt ) => {\n *\t\t\tevt.return = 'Foo!';\n *\t\t} );\n *\n *\t\tfoo.method(); // -> 'Foo'\n *\n * Finally, it is possible to access and modify the arguments the method is called with:\n *\n *\t\tmethod( a, b ) {\n *\t\t\tconsole.log( `${ a }, ${ b }` );\n *\t\t}\n *\n *\t\t// ...\n *\n *\t\tfoo.on( 'method', ( evt, args ) => {\n *\t\t\targs[ 0 ] = 3;\n *\n *\t\t\tconsole.log( args[ 1 ] ); // -> 2\n *\t\t}, { priority: 'high' } );\n *\n *\t\tfoo.method( 1, 2 ); // -> '3, 2'\n *\n * @method #decorate\n * @param {String} methodName Name of the method to decorate.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/editableelement\n */\n\nimport ContainerElement from './containerelement';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\n\nconst documentSymbol = Symbol( 'document' );\n\n/**\n * Editable element which can be a {@link module:engine/view/rooteditableelement~RootEditableElement root}\n * or nested editable area in the editor.\n *\n * Editable is automatically read-only when its {@link module:engine/view/document~Document Document} is read-only.\n *\n * The constructor of this class shouldn't be used directly. To create new `EditableElement` use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createEditableElement `downcastWriter#createEditableElement()`} method.\n *\n * @extends module:engine/view/containerelement~ContainerElement\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class EditableElement extends ContainerElement {\n\t/**\n\t * Creates an editable element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createEditableElement\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Whether the editable is in read-write or read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/editableelement~EditableElement#isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * Whether the editable is focused.\n\t\t *\n\t\t * This property updates when {@link module:engine/view/document~Document#isFocused document.isFocused} or view\n\t\t * selection is changed.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/editableelement~EditableElement#isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The {@link module:engine/view/document~Document} which is an owner of this root.\n\t\t * Can only by set once.\n\t\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-editableelement-document-already-set`\n\t\t * when document is already set.\n\t\t *\n\t\t * @member {module:engine/view/document~Document} #document\n\t\t */\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\teditableElement.is( 'editableElement' ); // -> true\n\t *\t\teditableElement.is( 'element' ); // -> true\n\t *\t\teditableElement.is( 'node' ); // -> true\n\t *\t\teditableElement.is( 'view:editableElement' ); // -> true\n\t *\t\teditableElement.is( 'view:element' ); // -> true\n\t *\t\teditableElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\teditableElement.is( 'model:element' ); // -> false\n\t *\t\teditableElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an editbale element, you can also check its\n\t * {@link module:engine/view/editableelement~EditableElement#name name}:\n\t *\n\t *\t\teditableElement.is( 'div' ); // -> true if this is a div element\n\t *\t\teditableElement.is( 'editableElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'editableElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'editableElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Returns document associated with the editable.\n\t *\n\t * @readonly\n\t * @returns {module:engine/view/document~Document}\n\t */\n\tget document() {\n\t\treturn this.getCustomProperty( documentSymbol );\n\t}\n\n\t/**\n\t * Sets document of this editable element.\n\t *\n\t * @protected\n\t * @param {module:engine/view/document~Document} document\n\t */\n\tset _document( document ) {\n\t\tif ( this.getCustomProperty( documentSymbol ) ) {\n\t\t\t/**\n\t\t\t * View document is already set. It can only be set once.\n\t\t\t *\n\t\t\t * @error view-editableelement-document-already-set\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-editableelement-document-already-set: View document is already set.', this );\n\t\t}\n\n\t\tthis._setCustomProperty( documentSymbol, document );\n\n\t\tthis.bind( 'isReadOnly' ).to( document );\n\n\t\tthis.bind( 'isFocused' ).to(\n\t\t\tdocument,\n\t\t\t'isFocused',\n\t\t\tisFocused => isFocused && document.selection.editableElement == this\n\t\t);\n\n\t\t// Update focus state based on selection changes.\n\t\tthis.listenTo( document.selection, 'change', () => {\n\t\t\tthis.isFocused = document.isFocused && document.selection.editableElement == this;\n\t\t} );\n\t}\n}\n\nmix( EditableElement, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/rooteditableelement\n */\n\nimport EditableElement from './editableelement';\n\nconst rootNameSymbol = Symbol( 'rootName' );\n\n/**\n * Class representing a single root in the data view. A root can be either {@link ~RootEditableElement#isReadOnly editable or read-only},\n * but in both cases it is called \"an editable\". Roots can contain other {@link module:engine/view/editableelement~EditableElement\n * editable elements} making them \"nested editables\".\n *\n * @extends module:engine/view/editableelement~EditableElement\n */\nexport default class RootEditableElement extends EditableElement {\n\t/**\n\t * Creates root editable element.\n\t *\n\t * @param {String} name Node name.\n\t */\n\tconstructor( name ) {\n\t\tsuper( name );\n\n\t\t/**\n\t\t * Name of this root inside {@link module:engine/view/document~Document} that is an owner of this root. If no\n\t\t * other name is set, `main` name is used.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.rootName = 'main';\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trootEditableElement.is( 'rootEditableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'editableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'element' ); // -> true\n\t *\t\trootEditableElement.is( 'node' ); // -> true\n\t *\t\trootEditableElement.is( 'view:rootEditableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'view:editableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'view:element' ); // -> true\n\t *\t\trootEditableElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\trootEditableElement.is( 'model:element' ); // -> false\n\t *\t\trootEditableElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is a root editbale element, you can also check its\n\t * {@link module:engine/view/rooteditableelement~RootEditableElement#name name}:\n\t *\n\t *\t\trootEditableElement.is( 'div' ); // -> true if this is a div root editable element\n\t *\t\trootEditableElement.is( 'rootEditableElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'rootElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'rootElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\tget rootName() {\n\t\treturn this.getCustomProperty( rootNameSymbol );\n\t}\n\n\tset rootName( rootName ) {\n\t\tthis._setCustomProperty( rootNameSymbol, rootName );\n\t}\n\n\t/**\n\t * Overrides old element name and sets new one.\n\t * This is needed because view roots are created before they are attached to the DOM.\n\t * The name of the root element is temporary at this stage. It has to be changed when the\n\t * view root element is attached to the DOM element.\n\t *\n\t * @protected\n\t * @param {String} name The new name of element.\n\t */\n\tset _name( name ) {\n\t\tthis.name = name;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/treewalker\n */\n\nimport Element from './element';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport Position from './position';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Position iterator class. It allows to iterate forward and backward over the document.\n */\nexport default class TreeWalker {\n\t/**\n\t * Creates a range iterator. All parameters are optional, but you have to specify either `boundaries` or `startPosition`.\n\t *\n\t * @constructor\n\t * @param {Object} options Object with configuration.\n\t * @param {module:engine/view/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {module:engine/view/position~Position} [options.startPosition] Starting position.\n\t * @param {'forward'|'backward'} [options.direction='forward'] Walking direction.\n\t * @param {Boolean} [options.singleCharacters=false] Flag indicating whether all characters from\n\t * {@link module:engine/view/text~Text} should be returned as one {@link module:engine/view/text~Text} (`false`) ore one by one as\n\t * {@link module:engine/view/textproxy~TextProxy} (`true`).\n\t * @param {Boolean} [options.shallow=false] Flag indicating whether iterator should enter elements or not. If the\n\t * iterator is shallow child nodes of any iterated node will not be returned along with `elementEnd` tag.\n\t * @param {Boolean} [options.ignoreElementEnd=false] Flag indicating whether iterator should ignore `elementEnd`\n\t * tags. If the option is true walker will not return a parent node of start position. If this option is `true`\n\t * each {@link module:engine/view/element~Element} will be returned once, while if the option is `false` they might be returned\n\t * twice: for `'elementStart'` and `'elementEnd'`.\n\t */\n\tconstructor( options = {} ) {\n\t\tif ( !options.boundaries && !options.startPosition ) {\n\t\t\t/**\n\t\t\t * Neither boundaries nor starting position have been defined.\n\t\t\t *\n\t\t\t * @error view-tree-walker-no-start-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.',\n\t\t\t\tnull\n\t\t\t);\n\t\t}\n\n\t\tif ( options.direction && options.direction != 'forward' && options.direction != 'backward' ) {\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.',\n\t\t\t\toptions.startPosition,\n\t\t\t\t{ direction: options.direction }\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Iterator boundaries.\n\t\t *\n\t\t * When the iterator is walking `'forward'` on the end of boundary or is walking `'backward'`\n\t\t * on the start of boundary, then `{ done: true }` is returned.\n\t\t *\n\t\t * If boundaries are not defined they are set before first and after last child of the root node.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/range~Range} module:engine/view/treewalker~TreeWalker#boundaries\n\t\t */\n\t\tthis.boundaries = options.boundaries || null;\n\n\t\t/**\n\t\t * Iterator position. If start position is not defined then position depends on {@link #direction}. If direction is\n\t\t * `'forward'` position starts form the beginning, when direction is `'backward'` position starts from the end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position} module:engine/view/treewalker~TreeWalker#position\n\t\t */\n\t\tif ( options.startPosition ) {\n\t\t\tthis.position = Position._createAt( options.startPosition );\n\t\t} else {\n\t\t\tthis.position = Position._createAt( options.boundaries[ options.direction == 'backward' ? 'end' : 'start' ] );\n\t\t}\n\n\t\t/**\n\t\t * Walking direction. Defaults `'forward'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'backward'|'forward'} module:engine/view/treewalker~TreeWalker#direction\n\t\t */\n\t\tthis.direction = options.direction || 'forward';\n\n\t\t/**\n\t\t * Flag indicating whether all characters from {@link module:engine/view/text~Text} should be returned as one\n\t\t * {@link module:engine/view/text~Text} or one by one as {@link module:engine/view/textproxy~TextProxy}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#singleCharacters\n\t\t */\n\t\tthis.singleCharacters = !!options.singleCharacters;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should enter elements or not. If the iterator is shallow child nodes of any\n\t\t * iterated node will not be returned along with `elementEnd` tag.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#shallow\n\t\t */\n\t\tthis.shallow = !!options.shallow;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should ignore `elementEnd` tags. If set to `true`, walker will not\n\t\t * return a parent node of the start position. Each {@link module:engine/view/element~Element} will be returned once.\n\t\t * When set to `false` each element might be returned twice: for `'elementStart'` and `'elementEnd'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#ignoreElementEnd\n\t\t */\n\t\tthis.ignoreElementEnd = !!options.ignoreElementEnd;\n\n\t\t/**\n\t\t * Start boundary parent.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/node~Node} module:engine/view/treewalker~TreeWalker#_boundaryStartParent\n\t\t */\n\t\tthis._boundaryStartParent = this.boundaries ? this.boundaries.start.parent : null;\n\n\t\t/**\n\t\t * End boundary parent.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/node~Node} module:engine/view/treewalker~TreeWalker#_boundaryEndParent\n\t\t */\n\t\tthis._boundaryEndParent = this.boundaries ? this.boundaries.end.parent : null;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:engine/view/treewalker~TreeWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves {@link #position} in the {@link #direction} skipping values as long as the callback function returns `true`.\n\t *\n\t * For example:\n\t *\n\t * \t\twalker.skip( value => value.type == 'text' ); // <p>{}foo</p> -> <p>foo[]</p>\n\t * \t\twalker.skip( value => true ); // Move the position to the end: <p>{}foo</p> -> <p>foo</p>[]\n\t * \t\twalker.skip( value => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/view/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t */\n\tskip( skip ) {\n\t\tlet done, value, prevPosition;\n\n\t\tdo {\n\t\t\tprevPosition = this.position;\n\n\t\t\t( { done, value } = this.next() );\n\t\t} while ( !done && skip( value ) );\n\n\t\tif ( !done ) {\n\t\t\tthis.position = prevPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the next tree walker's value.\n\t *\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} Object implementing iterator interface, returning\n\t * information about taken step.\n\t */\n\tnext() {\n\t\tif ( this.direction == 'forward' ) {\n\t\t\treturn this._next();\n\t\t} else {\n\t\t\treturn this._previous();\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step forward in view. Moves the {@link #position} to the next position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done `true` if iterator is done, `false` otherwise.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_next() {\n\t\tlet position = this.position.clone();\n\t\tconst previousPosition = this.position;\n\t\tconst parent = position.parent;\n\n\t\t// We are at the end of the root.\n\t\tif ( parent.parent === null && position.offset === parent.childCount ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent === this._boundaryEndParent && position.offset == this.boundaries.end.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just after current position.\n\t\tlet node;\n\n\t\t// Text is a specific parent because it contains string instead of child nodes.\n\t\tif ( parent instanceof Text ) {\n\t\t\tif ( position.isAtEnd ) {\n\t\t\t\t// Prevent returning \"elementEnd\" for Text node. Skip that value and return the next walker step.\n\t\t\t\tthis.position = Position._createAfter( parent );\n\n\t\t\t\treturn this._next();\n\t\t\t}\n\n\t\t\tnode = parent.data[ position.offset ];\n\t\t} else {\n\t\t\tnode = parent.getChild( position.offset );\n\t\t}\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition = new Position( node, 0 );\n\t\t\t} else {\n\t\t\t\tposition.offset++;\n\t\t\t}\n\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t} else if ( node instanceof Text ) {\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tposition = new Position( node, 0 );\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\tlet charactersCount = node.data.length;\n\t\t\t\tlet item;\n\n\t\t\t\t// If text stick out of walker range, we need to cut it and wrap in TextProxy.\n\t\t\t\tif ( node == this._boundaryEndParent ) {\n\t\t\t\t\tcharactersCount = this.boundaries.end.offset;\n\t\t\t\t\titem = new TextProxy( node, 0, charactersCount );\n\t\t\t\t\tposition = Position._createAfter( item );\n\t\t\t\t} else {\n\t\t\t\t\titem = new TextProxy( node, 0, node.data.length );\n\t\t\t\t\t// If not just keep moving forward.\n\t\t\t\t\tposition.offset++;\n\t\t\t\t}\n\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t\t}\n\t\t} else if ( typeof node == 'string' ) {\n\t\t\tlet textLength;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\ttextLength = 1;\n\t\t\t} else {\n\t\t\t\t// Check if text stick out of walker range.\n\t\t\t\tconst endOffset = parent === this._boundaryEndParent ? this.boundaries.end.offset : parent.data.length;\n\n\t\t\t\ttextLength = endOffset - position.offset;\n\t\t\t}\n\n\t\t\tconst textProxy = new TextProxy( parent, position.offset, textLength );\n\n\t\t\tposition.offset += textLength;\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'text', textProxy, previousPosition, position, textLength );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the end of current `parent`.\n\t\t\tposition = Position._createAfter( parent );\n\t\t\tthis.position = position;\n\n\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\treturn this._formatReturnValue( 'elementEnd', parent, previousPosition, position );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step backward in view. Moves the {@link #position} to the previous position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_previous() {\n\t\tlet position = this.position.clone();\n\t\tconst previousPosition = this.position;\n\t\tconst parent = position.parent;\n\n\t\t// We are at the beginning of the root.\n\t\tif ( parent.parent === null && position.offset === 0 ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent == this._boundaryStartParent && position.offset == this.boundaries.start.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just before current position.\n\t\tlet node;\n\n\t\t// Text {@link module:engine/view/text~Text} element is a specific parent because contains string instead of child nodes.\n\t\tif ( parent instanceof Text ) {\n\t\t\tif ( position.isAtStart ) {\n\t\t\t\t// Prevent returning \"elementStart\" for Text node. Skip that value and return the next walker step.\n\t\t\t\tthis.position = Position._createBefore( parent );\n\n\t\t\t\treturn this._previous();\n\t\t\t}\n\n\t\t\tnode = parent.data[ position.offset - 1 ];\n\t\t} else {\n\t\t\tnode = parent.getChild( position.offset - 1 );\n\t\t}\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition = new Position( node, node.childCount );\n\t\t\t\tthis.position = position;\n\n\t\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\t\treturn this._previous();\n\t\t\t\t} else {\n\t\t\t\t\treturn this._formatReturnValue( 'elementEnd', node, previousPosition, position );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tposition.offset--;\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t\t}\n\t\t} else if ( node instanceof Text ) {\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tposition = new Position( node, node.data.length );\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._previous();\n\t\t\t} else {\n\t\t\t\tlet charactersCount = node.data.length;\n\t\t\t\tlet item;\n\n\t\t\t\t// If text stick out of walker range, we need to cut it and wrap in TextProxy.\n\t\t\t\tif ( node == this._boundaryStartParent ) {\n\t\t\t\t\tconst offset = this.boundaries.start.offset;\n\n\t\t\t\t\titem = new TextProxy( node, offset, node.data.length - offset );\n\t\t\t\t\tcharactersCount = item.data.length;\n\t\t\t\t\tposition = Position._createBefore( item );\n\t\t\t\t} else {\n\t\t\t\t\titem = new TextProxy( node, 0, node.data.length );\n\t\t\t\t\t// If not just keep moving backward.\n\t\t\t\t\tposition.offset--;\n\t\t\t\t}\n\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t\t}\n\t\t} else if ( typeof node == 'string' ) {\n\t\t\tlet textLength;\n\n\t\t\tif ( !this.singleCharacters ) {\n\t\t\t\t// Check if text stick out of walker range.\n\t\t\t\tconst startOffset = parent === this._boundaryStartParent ? this.boundaries.start.offset : 0;\n\n\t\t\t\ttextLength = position.offset - startOffset;\n\t\t\t} else {\n\t\t\t\ttextLength = 1;\n\t\t\t}\n\n\t\t\tposition.offset -= textLength;\n\n\t\t\tconst textProxy = new TextProxy( parent, position.offset, textLength );\n\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'text', textProxy, previousPosition, position, textLength );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the beginning of current `parent`.\n\t\t\tposition = Position._createBefore( parent );\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'elementStart', parent, previousPosition, position, 1 );\n\t\t}\n\t}\n\n\t/**\n\t * Format returned data and adjust `previousPosition` and `nextPosition` if reach the bound of the {@link module:engine/view/text~Text}.\n\t *\n\t * @private\n\t * @param {module:engine/view/treewalker~TreeWalkerValueType} type Type of step.\n\t * @param {module:engine/view/item~Item} item Item between old and new position.\n\t * @param {module:engine/view/position~Position} previousPosition Previous position of iterator.\n\t * @param {module:engine/view/position~Position} nextPosition Next position of iterator.\n\t * @param {Number} [length] Length of the item.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue}\n\t */\n\t_formatReturnValue( type, item, previousPosition, nextPosition, length ) {\n\t\t// Text is a specific parent, because contains string instead of children.\n\t\t// Walker doesn't enter to the Text except situations when walker is iterating over every single character,\n\t\t// or the bound starts/ends inside the Text. So when the position is at the beginning or at the end of the Text\n\t\t// we move it just before or just after Text.\n\t\tif ( item instanceof TextProxy ) {\n\t\t\t// Position is at the end of Text.\n\t\t\tif ( item.offsetInText + item.data.length == item.textNode.data.length ) {\n\t\t\t\tif ( this.direction == 'forward' && !( this.boundaries && this.boundaries.end.isEqual( this.position ) ) ) {\n\t\t\t\t\tnextPosition = Position._createAfter( item.textNode );\n\t\t\t\t\t// When we change nextPosition of returned value we need also update walker current position.\n\t\t\t\t\tthis.position = nextPosition;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousPosition = Position._createAfter( item.textNode );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Position is at the begining ot the text.\n\t\t\tif ( item.offsetInText === 0 ) {\n\t\t\t\tif ( this.direction == 'backward' && !( this.boundaries && this.boundaries.start.isEqual( this.position ) ) ) {\n\t\t\t\t\tnextPosition = Position._createBefore( item.textNode );\n\t\t\t\t\t// When we change nextPosition of returned value we need also update walker current position.\n\t\t\t\t\tthis.position = nextPosition;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousPosition = Position._createBefore( item.textNode );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn {\n\t\t\tdone: false,\n\t\t\tvalue: {\n\t\t\t\ttype,\n\t\t\t\titem,\n\t\t\t\tpreviousPosition,\n\t\t\t\tnextPosition,\n\t\t\t\tlength\n\t\t\t}\n\t\t};\n\t}\n}\n\n/**\n * Type of the step made by {@link module:engine/view/treewalker~TreeWalker}.\n * Possible values: `'elementStart'` if walker is at the beginning of a node, `'elementEnd'` if walker is at the end\n * of node, or `'text'` if walker traversed over single and multiple characters.\n * For {@link module:engine/view/text~Text} `elementStart` and `elementEnd` is not returned.\n *\n * @typedef {String} module:engine/view/treewalker~TreeWalkerValueType\n */\n\n/**\n * Object returned by {@link module:engine/view/treewalker~TreeWalker} when traversing tree view.\n *\n * @typedef {Object} module:engine/view/treewalker~TreeWalkerValue\n * @property {module:engine/view/treewalker~TreeWalkerValueType} type\n * @property {module:engine/view/item~Item} item Item between the old and the new positions\n * of the tree walker.\n * @property {module:engine/view/position~Position} previousPosition Previous position of the iterator.\n * * Forward iteration: For `'elementEnd'` it is the last position inside the element. For all other types it is the\n * position before the item.\n * * Backward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after item.\n * * If the position is at the beginning or at the end of the {@link module:engine/view/text~Text} it is always moved from the\n * inside of the text to its parent just before or just after that text.\n * @property {module:engine/view/position~Position} nextPosition Next position of the iterator.\n * * Forward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after the item.\n * * Backward iteration: For `'elementEnd'` it is last position inside element. For all other types it is the position\n * before the item.\n * * If the position is at the beginning or at the end of the {@link module:engine/view/text~Text} it is always moved from the\n * inside of the text to its parent just before or just after that text.\n * @property {Number} [length] Length of the item. For `'elementStart'` it is `1`. For `'text'` it is\n * the length of that text. For `'elementEnd'` it is `undefined`.\n */\n\n/**\n * Tree walking directions.\n *\n * @typedef {'forward'|'backward'} module:engine/view/treewalker~TreeWalkerDirection\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/position\n */\n\nimport TreeWalker from './treewalker';\n\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EditableElement from './editableelement';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Position in the view tree. Position is represented by its parent node and an offset in this parent.\n *\n * In order to create a new position instance use the `createPosition*()` factory methods available in:\n *\n * * {@link module:engine/view/view~View}\n * * {@link module:engine/view/downcastwriter~DowncastWriter}\n * * {@link module:engine/view/upcastwriter~UpcastWriter}\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} parent Position parent.\n\t * @param {Number} offset Position offset.\n\t */\n\tconstructor( parent, offset ) {\n\t\t/**\n\t\t * Position parent.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t\t * module:engine/view/position~Position#parent\n\t\t */\n\t\tthis.parent = parent;\n\n\t\t/**\n\t\t * Position offset.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} module:engine/view/position~Position#offset\n\t\t */\n\t\tthis.offset = offset;\n\t}\n\n\t/**\n\t * Node directly after the position. Equals `null` when there is no node after position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset ) || null;\n\t}\n\n\t/**\n\t * Node directly before the position. Equals `null` when there is no node before position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeBefore() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset - 1 ) || null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\tconst endOffset = this.parent.is( 'text' ) ? this.parent.data.length : this.parent.childCount;\n\n\t\treturn this.offset === endOffset;\n\t}\n\n\t/**\n\t * Position's root, that is the root of the position's parent element.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.parent.root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this position, or `null` if\n\t * position is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\tlet editable = this.parent;\n\n\t\twhile ( !( editable instanceof EditableElement ) ) {\n\t\t\tif ( editable.parent ) {\n\t\t\t\teditable = editable.parent;\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t}\n\n\t\treturn editable;\n\t}\n\n\t/**\n\t * Returns a new instance of Position with offset incremented by `shift` value.\n\t *\n\t * @param {Number} shift How position offset should get changed. Accepts negative values.\n\t * @returns {module:engine/view/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = Position._createAt( this );\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/view/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' ); // <p>{}foo</p> -> <p>foo[]</p>\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } ); // <p>foo[]</p> -> <p>{}foo</p>\n\t * \t\tgetLastMatchingPosition( value => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/view/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/view/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and it's ancestors.\n\t *\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/node~Node} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions.\n\t *\n\t * @param {module:engine/view/position~Position} position\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tposition.is( 'position' ); // -> true\n\t *\t\tposition.is( 'view:position' ); // -> true\n\t *\n\t *\t\tposition.is( 'model:position' ); // -> false\n\t *\t\tposition.is( 'element' ); // -> false\n\t *\t\tposition.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'position' || type == 'view:position';\n\t}\n\n\t/**\n\t * Checks whether this position equals given position.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn ( this.parent == otherPosition.parent && this.offset == otherPosition.offset );\n\t}\n\n\t/**\n\t * Checks whether this position is located before given position. When method returns `false` it does not mean that\n\t * this position is after give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isAfter\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is located after given position. When method returns `false` it does not mean that\n\t * this position is before give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isBefore\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before, after or in same position that other position. Two positions may be also\n\t * different when they are located in separate roots.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/view/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.root !== otherPosition.root ) {\n\t\t\treturn 'different';\n\t\t}\n\n\t\tif ( this.isEqual( otherPosition ) ) {\n\t\t\treturn 'same';\n\t\t}\n\n\t\t// Get path from root to position's parent element.\n\t\tconst thisPath = this.parent.is( 'node' ) ? this.parent.getPath() : [];\n\t\tconst otherPath = otherPosition.parent.is( 'node' ) ? otherPosition.parent.getPath() : [];\n\n\t\t// Add the positions' offsets to the parents offsets.\n\t\tthisPath.push( this.offset );\n\t\totherPath.push( otherPosition.offset );\n\n\t\t// Compare both path arrays to find common ancestor.\n\t\tconst result = compareArrays( thisPath, otherPath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn 'before';\n\n\t\t\tcase 'extension':\n\t\t\t\treturn 'after';\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < otherPath[ result ] ? 'before' : 'after';\n\t\t}\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/view/treewalker~TreeWalker TreeWalker} instance with this positions as a start position.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}\n\t * @param {module:engine/view/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\tclone() {\n\t\treturn new Position( this.parent, this.offset );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link module:engine/view/position~Position._createBefore},\n\t * * {@link module:engine/view/position~Position._createAfter}.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tstatic _createAt( itemOrPosition, offset ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn new this( itemOrPosition.parent, itemOrPosition.offset );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.is( 'text' ) ? node.data.length : node.childCount;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this._createBefore( node );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this._createAfter( node );\n\t\t\t} else if ( offset !== 0 && !offset ) {\n\t\t\t\t/**\n\t\t\t\t * {@link module:engine/view/view~View#createPositionAt `View#createPositionAt()`}\n\t\t\t\t * requires the offset to be specified when the first parameter is a view item.\n\t\t\t\t *\n\t\t\t\t * @error view-createPositionAt-offset-required\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-createPositionAt-offset-required: ' +\n\t\t\t\t\t'View#createPositionAt() requires the offset when the first parameter is a view item.',\n\t\t\t\t\tnode\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn new Position( node, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic _createAfter( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText + item.data.length );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root.\n\t\t\t *\n\t\t\t * @error view-position-after-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-after-root: You can not make position after root.', item, { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index + 1 );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic _createBefore( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You cannot make a position before a root.\n\t\t\t *\n\t\t\t * @error view-position-before-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-before-root: You can not make position before root.', item, { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index );\n\t}\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/view/position~PositionRelation\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/range\n */\n\nimport Position from './position';\nimport TreeWalker from './treewalker';\n\n/**\n * Range in the view tree. A range is represented by its start and end {@link module:engine/view/position~Position positions}.\n *\n * In order to create a new position instance use the `createPosition*()` factory methods available in:\n *\n * * {@link module:engine/view/view~View}\n * * {@link module:engine/view/downcastwriter~DowncastWriter}\n * * {@link module:engine/view/upcastwriter~UpcastWriter}\n */\nexport default class Range {\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** Constructor creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at the `start` position.\n\t */\n\tconstructor( start, end = null ) {\n\t\t/**\n\t\t * Start position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position}\n\t\t */\n\t\tthis.start = start.clone();\n\n\t\t/**\n\t\t * End position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position}\n\t\t */\n\t\tthis.end = end ? end.clone() : start.clone();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link module:engine/view/item~Item view items} that are in this range and returns\n\t * them together with additional information like length or {@link module:engine/view/position~Position positions},\n\t * grouped as {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * This iterator uses {@link module:engine/view/treewalker~TreeWalker TreeWalker} with `boundaries` set to this range and\n\t * `ignoreElementEnd` option\n\t * set to `true`.\n\t *\n\t * @returns {Iterable.<module:engine/view/treewalker~TreeWalkerValue>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tyield* new TreeWalker( { boundaries: this, ignoreElementEnd: true } );\n\t}\n\n\t/**\n\t * Returns whether the range is collapsed, that is it start and end positions are equal.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.start.isEqual( this.end );\n\t}\n\n\t/**\n\t * Returns whether this range is flat, that is if {@link module:engine/view/range~Range#start start} position and\n\t * {@link module:engine/view/range~Range#end end} position are in the same {@link module:engine/view/position~Position#parent parent}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isFlat() {\n\t\treturn this.start.parent === this.end.parent;\n\t}\n\n\t/**\n\t * Range root element.\n\t *\n\t * @type {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.start.root;\n\t}\n\n\t/**\n\t * Creates a maximal range that has the same content as this range but is expanded in both ways (at the beginning\n\t * and at the end).\n\t *\n\t * For example:\n\t *\n\t *\t\t<p>Foo</p><p><b>{Bar}</b></p> -> <p>Foo</p>[<p><b>Bar</b>]</p>\n\t *\t\t<p><b>foo</b>{bar}<span></span></p> -> <p><b>foo[</b>bar<span></span>]</p>\n\t *\n\t * Note that in the sample above:\n\t *\n\t * - `<p>` have type of {@link module:engine/view/containerelement~ContainerElement},\n\t * - `<b>` have type of {@link module:engine/view/attributeelement~AttributeElement},\n\t * - `<span>` have type of {@link module:engine/view/uielement~UIElement}.\n\t *\n\t * @returns {module:engine/view/range~Range} Enlarged range.\n\t */\n\tgetEnlarged() {\n\t\tlet start = this.start.getLastMatchingPosition( enlargeTrimSkip, { direction: 'backward' } );\n\t\tlet end = this.end.getLastMatchingPosition( enlargeTrimSkip );\n\n\t\t// Fix positions, in case if they are in Text node.\n\t\tif ( start.parent.is( 'text' ) && start.isAtStart ) {\n\t\t\tstart = Position._createBefore( start.parent );\n\t\t}\n\n\t\tif ( end.parent.is( 'text' ) && end.isAtEnd ) {\n\t\t\tend = Position._createAfter( end.parent );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a minimum range that has the same content as this range but is trimmed in both ways (at the beginning\n\t * and at the end).\n\t *\n\t * For example:\n\t *\n\t *\t\t<p>Foo</p>[<p><b>Bar</b>]</p> -> <p>Foo</p><p><b>{Bar}</b></p>\n\t *\t\t<p><b>foo[</b>bar<span></span>]</p> -> <p><b>foo</b>{bar}<span></span></p>\n\t *\n\t * Note that in the sample above:\n\t *\n\t * - `<p>` have type of {@link module:engine/view/containerelement~ContainerElement},\n\t * - `<b>` have type of {@link module:engine/view/attributeelement~AttributeElement},\n\t * - `<span>` have type of {@link module:engine/view/uielement~UIElement}.\n\t *\n\t * @returns {module:engine/view/range~Range} Shrink range.\n\t */\n\tgetTrimmed() {\n\t\tlet start = this.start.getLastMatchingPosition( enlargeTrimSkip );\n\n\t\tif ( start.isAfter( this.end ) || start.isEqual( this.end ) ) {\n\t\t\treturn new Range( start, start );\n\t\t}\n\n\t\tlet end = this.end.getLastMatchingPosition( enlargeTrimSkip, { direction: 'backward' } );\n\t\tconst nodeAfterStart = start.nodeAfter;\n\t\tconst nodeBeforeEnd = end.nodeBefore;\n\n\t\t// Because TreeWalker prefers positions next to text node, we need to move them manually into these text nodes.\n\t\tif ( nodeAfterStart && nodeAfterStart.is( 'text' ) ) {\n\t\t\tstart = new Position( nodeAfterStart, 0 );\n\t\t}\n\n\t\tif ( nodeBeforeEnd && nodeBeforeEnd.is( 'text' ) ) {\n\t\t\tend = new Position( nodeBeforeEnd, nodeBeforeEnd.data.length );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Two ranges are equal if their start and end positions are equal.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges are equal, `false` otherwise\n\t */\n\tisEqual( otherRange ) {\n\t\treturn this == otherRange || ( this.start.isEqual( otherRange.start ) && this.end.isEqual( otherRange.end ) );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/view/position~Position position}.\n\t *\n\t * @param {module:engine/view/position~Position} position Position to check.\n\t * @returns {Boolean} `true` if given {@link module:engine/view/position~Position position} is contained in this range,\n\t * `false` otherwise.\n\t */\n\tcontainsPosition( position ) {\n\t\treturn position.isAfter( this.start ) && position.isBefore( this.end );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/view/range~Range range}.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to check.\n\t * @param {Boolean} [loose=false] Whether the check is loose or strict. If the check is strict (`false`), compared range cannot\n\t * start or end at the same position as this range boundaries. If the check is loose (`true`), compared range can start, end or\n\t * even be equal to this range. Note that collapsed ranges are always compared in strict mode.\n\t * @returns {Boolean} `true` if given {@link module:engine/view/range~Range range} boundaries are contained by this range, `false`\n\t * otherwise.\n\t */\n\tcontainsRange( otherRange, loose = false ) {\n\t\tif ( otherRange.isCollapsed ) {\n\t\t\tloose = false;\n\t\t}\n\n\t\tconst containsStart = this.containsPosition( otherRange.start ) || ( loose && this.start.isEqual( otherRange.start ) );\n\t\tconst containsEnd = this.containsPosition( otherRange.end ) || ( loose && this.end.isEqual( otherRange.end ) );\n\n\t\treturn containsStart && containsEnd;\n\t}\n\n\t/**\n\t * Computes which part(s) of this {@link module:engine/view/range~Range range} is not a part of given\n\t * {@link module:engine/view/range~Range range}.\n\t * Returned array contains zero, one or two {@link module:engine/view/range~Range ranges}.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet foo = downcastWriter.createText( 'foo' );\n\t *\t\tlet img = downcastWriter.createContainerElement( 'img' );\n\t *\t\tlet bar = downcastWriter.createText( 'bar' );\n\t *\t\tlet p = downcastWriter.createContainerElement( 'p', null, [ foo, img, bar ] );\n\t *\n\t *\t\tlet range = view.createRange( view.createPositionAt( foo, 2 ), view.createPositionAt( bar, 1 ); // \"o\", img, \"b\" are in range.\n\t *\t\tlet otherRange = view.createRange( // \"oo\", img, \"ba\" are in range.\n\t *\t\t\tview.createPositionAt( foo, 1 ),\n\t *\t\t\tview.createPositionAt( bar, 2 )\n\t *\t\t);\n\t *\t\tlet transformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has no ranges because `otherRange` contains `range`\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( foo, 1 ), view.createPositionAt( p, 2 ); // \"oo\", img are in range.\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has one range: from ( p, 2 ) to ( bar, 1 )\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( p, 1 ), view.createPositionAt( p, 2 ) ); // img is in range.\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has two ranges: from ( foo, 1 ) to ( p, 1 ) and from ( p, 2 ) to ( bar, 1 )\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to differentiate against.\n\t * @returns {Array.<module:engine/view/range~Range>} The difference between ranges.\n\t */\n\tgetDifference( otherRange ) {\n\t\tconst ranges = [];\n\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect.\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the start to the middle of this range.\n\t\t\t\tranges.push( new Range( this.start, otherRange.start ) );\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the middle of this range to the end.\n\t\t\t\tranges.push( new Range( otherRange.end, this.end ) );\n\t\t\t}\n\t\t} else {\n\t\t\t// Ranges do not intersect, return the original range.\n\t\t\tranges.push( this.clone() );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an intersection of this {@link module:engine/view/range~Range range} and given {@link module:engine/view/range~Range range}.\n\t * Intersection is a common part of both of those ranges. If ranges has no common part, returns `null`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet foo = downcastWriter.createText( 'foo' );\n\t *\t\tlet img = downcastWriter.createContainerElement( 'img' );\n\t *\t\tlet bar = downcastWriter.createText( 'bar' );\n\t *\t\tlet p = downcastWriter.createContainerElement( 'p', null, [ foo, img, bar ] );\n\t *\n\t *\t\tlet range = view.createRange( view.createPositionAt( foo, 2 ), view.createPositionAt( bar, 1 ); // \"o\", img, \"b\" are in range.\n\t *\t\tlet otherRange = view.createRange( view.createPositionAt( foo, 1 ), view.createPositionAt( p, 2 ); // \"oo\", img are in range.\n\t *\t\tlet transformed = range.getIntersection( otherRange ); // range from ( foo, 1 ) to ( p, 2 ).\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( bar, 1 ), view.createPositionAt( bar, 3 ); \"ar\" is in range.\n\t *\t\ttransformed = range.getIntersection( otherRange ); // null - no common part.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to check for intersection.\n\t * @returns {module:engine/view/range~Range|null} A common part of given ranges or `null` if ranges have no common part.\n\t */\n\tgetIntersection( otherRange ) {\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect, so a common range will be returned.\n\t\t\t// At most, it will be same as this range.\n\t\t\tlet commonRangeStart = this.start;\n\t\t\tlet commonRangeEnd = this.end;\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means thaNt we have to\n\t\t\t\t// shrink common range to the given range start.\n\t\t\t\tcommonRangeStart = otherRange.start;\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// shrink common range to the given range end.\n\t\t\t\tcommonRangeEnd = otherRange.end;\n\t\t\t}\n\n\t\t\treturn new Range( commonRangeStart, commonRangeEnd );\n\t\t}\n\n\t\t// Ranges do not intersect, so they do not have common part.\n\t\treturn null;\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/view/treewalker~TreeWalker TreeWalker} instance with this range as a boundary.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @param {module:engine/view/position~Position} [options.startPosition]\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t * @returns {module:engine/view/treewalker~TreeWalker}\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/node~Node} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of range's both ends (in which the entire range is contained).\n\t *\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor() {\n\t\treturn this.start.getCommonAncestor( this.end );\n\t}\n\n\t/**\n\t * Clones this range.\n\t *\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tclone() {\n\t\treturn new Range( this.start, this.end );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/view/item~Item view items} that are in this range and returns\n\t * them.\n\t *\n\t * This method uses {@link module:engine/view/treewalker~TreeWalker} with `boundaries` set to this range and `ignoreElementEnd` option\n\t * set to `true`. However it returns only {@link module:engine/view/item~Item items},\n\t * not {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/view/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/view/item~Item>}\n\t */\n\t* getItems( options = {} ) {\n\t\toptions.boundaries = this;\n\t\toptions.ignoreElementEnd = true;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.item;\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/view/position~Position positions} that are boundaries or\n\t * contained in this range.\n\t *\n\t * This method uses {@link module:engine/view/treewalker~TreeWalker} with `boundaries` set to this range. However it returns only\n\t * {@link module:engine/view/position~Position positions}, not {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/view/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/view/position~Position>}\n\t */\n\t* getPositions( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tyield treeWalker.position;\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.nextPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\trange.is( 'range' ); // -> true\n\t *\t\trange.is( 'view:range' ); // -> true\n\t *\n\t *\t\trange.is( 'model:range' ); // -> false\n\t *\t\trange.is( 'element' ); // -> false\n\t *\t\trange.is( 'selection' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'range' || type == 'view:range';\n\t}\n\n\t/**\n\t * Checks and returns whether this range intersects with the given range.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} True if ranges intersect.\n\t */\n\tisIntersecting( otherRange ) {\n\t\treturn this.start.isBefore( otherRange.end ) && this.end.isAfter( otherRange.start );\n\t}\n\n\t/**\n\t * Creates a range from the given parents and offsets.\n\t *\n\t * @protected\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} startElement Start position\n\t * parent element.\n\t * @param {Number} startOffset Start position offset.\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} endElement End position\n\t * parent element.\n\t * @param {Number} endOffset End position offset.\n\t * @returns {module:engine/view/range~Range} Created range.\n\t */\n\tstatic _createFromParentsAndOffsets( startElement, startOffset, endElement, endOffset ) {\n\t\treturn new this(\n\t\t\tnew Position( startElement, startOffset ),\n\t\t\tnew Position( endElement, endOffset )\n\t\t);\n\t}\n\n\t/**\n\t * Creates a new range, spreading from specified {@link module:engine/view/position~Position position} to a position moved by\n\t * given `shift`. If `shift` is a negative value, shifted position is treated as the beginning of the range.\n\t *\n\t * @protected\n\t * @param {module:engine/view/position~Position} position Beginning of the range.\n\t * @param {Number} shift How long the range should be.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createFromPositionAndShift( position, shift ) {\n\t\tconst start = position;\n\t\tconst end = position.getShiftedBy( shift );\n\n\t\treturn shift > 0 ? new this( start, end ) : new this( end, start );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @protected\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createIn( element ) {\n\t\treturn this._createFromParentsAndOffsets( element, 0, element, element.childCount );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createOn( item ) {\n\t\tconst size = item.is( 'textProxy' ) ? item.offsetSize : 1;\n\n\t\treturn this._createFromPositionAndShift( Position._createBefore( item ), size );\n\t}\n}\n\n// Function used by getEnlarged and getTrimmed methods.\nfunction enlargeTrimSkip( value ) {\n\tif ( value.item.is( 'attributeElement' ) || value.item.is( 'uiElement' ) ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/count\n */\n\n/**\n * Returns the number of items return by the iterator.\n *\n *\t\tcount( [ 1, 2, 3, 4, 5 ] ); // 5;\n *\n * @param {Iterable.<*>} iterator Any iterator.\n * @returns {Number} Number of items returned by that iterator.\n */\nexport default function count( iterator ) {\n\tlet count = 0;\n\n\tfor ( const _ of iterator ) { // eslint-disable-line no-unused-vars\n\t\tcount++;\n\t}\n\n\treturn count;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/selection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Range from './range';\nimport Position from './position';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport Node from './node';\nimport Element from './element';\nimport count from '@ckeditor/ckeditor5-utils/src/count';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport DocumentSelection from './documentselection';\n\n/**\n * Class representing an arbirtary selection in the view.\n * See also {@link module:engine/view/documentselection~DocumentSelection}.\n *\n * New selection instances can be created via the constructor or one these methods:\n *\n * * {@link module:engine/view/view~View#createSelection `View#createSelection()`},\n * * {@link module:engine/view/upcastwriter~UpcastWriter#createSelection `UpcastWriter#createSelection()`}.\n *\n * A selection can consist of {@link module:engine/view/range~Range ranges} that can be set by using\n * the {@link module:engine/view/selection~Selection#setTo `Selection#setTo()`} method.\n */\nexport default class Selection {\n\t/**\n\t * Creates new selection instance.\n\t *\n\t * **Note**: The selection constructor is available as a factory method:\n\t *\n\t * * {@link module:engine/view/view~View#createSelection `View#createSelection()`},\n\t * * {@link module:engine/view/upcastwriter~UpcastWriter#createSelection `UpcastWriter#createSelection()`}.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tconstructor( selectable = null, placeOrOffset, options ) {\n\t\t/**\n\t\t * Stores all ranges that are selected.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/range~Range>}\n\t\t */\n\t\tthis._ranges = [];\n\n\t\t/**\n\t\t * Specifies whether the last added range was added as a backward or forward range.\n\t\t *\n\t\t * @protected\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._lastRangeBackward = false;\n\n\t\t/**\n\t\t * Specifies whether selection instance is fake.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._isFake = false;\n\n\t\t/**\n\t\t * Fake selection's label.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._fakeSelectionLabel = '';\n\n\t\tthis.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Returns true if selection instance is marked as `fake`.\n\t *\n\t * @see #setTo\n\t * @returns {Boolean}\n\t */\n\tget isFake() {\n\t\treturn this._isFake;\n\t}\n\n\t/**\n\t * Returns fake selection label.\n\t *\n\t * @see #setTo\n\t * @returns {String}\n\t */\n\tget fakeSelectionLabel() {\n\t\treturn this._fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the selection starts. Together with\n\t * {@link #focus focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always the start or end of the most recent added range.\n\t * It may be a bit unintuitive when there are multiple ranges in selection.\n\t *\n\t * @see #focus\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget anchor() {\n\t\tif ( !this._ranges.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\t\tconst anchor = this._lastRangeBackward ? range.end : range.start;\n\n\t\treturn anchor.clone();\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * @see #anchor\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget focus() {\n\t\tif ( !this._ranges.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\t\tconst focus = this._lastRangeBackward ? range.start : range.end;\n\n\t\treturn focus.clone();\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.rangeCount === 1 && this._ranges[ 0 ].isCollapsed;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._ranges.length;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus} precedes {@link #anchor}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn !this.isCollapsed && this._lastRangeBackward;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this selection, or `null`\n\t * if the selection is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\tif ( this.anchor ) {\n\t\t\treturn this.anchor.editableElement;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns an iterable that contains copies of all ranges added to the selection.\n\t *\n\t * @returns {Iterable.<module:engine/view/range~Range>}\n\t */\n\t* getRanges() {\n\t\tfor ( const range of this._ranges ) {\n\t\t\tyield range.clone();\n\t\t}\n\t}\n\n\t/**\n\t * Returns copy of the first range in the selection. First range is the one which\n\t * {@link module:engine/view/range~Range#start start} position {@link module:engine/view/position~Position#isBefore is before} start\n\t * position of all other ranges (not to confuse with the first range added to the selection).\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\tlet first = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !first || range.start.isBefore( first.start ) ) {\n\t\t\t\tfirst = range;\n\t\t\t}\n\t\t}\n\n\t\treturn first ? first.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the last range in the selection. Last range is the one which {@link module:engine/view/range~Range#end end}\n\t * position {@link module:engine/view/position~Position#isAfter is after} end position of all other ranges (not to confuse\n\t * with the last range added to the selection). Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\tlet last = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !last || range.end.isAfter( last.end ) ) {\n\t\t\t\tlast = range;\n\t\t\t}\n\t\t}\n\n\t\treturn last ? last.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the first position in the selection. First position is the position that\n\t * {@link module:engine/view/position~Position#isBefore is before} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\tconst firstRange = this.getFirstRange();\n\n\t\treturn firstRange ? firstRange.start.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the last position in the selection. Last position is the position that\n\t * {@link module:engine/view/position~Position#isAfter is after} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\tconst lastRange = this.getLastRange();\n\n\t\treturn lastRange ? lastRange.end.clone() : null;\n\t}\n\n\t/**\n\t * Checks whether, this selection is equal to given selection. Selections are equal if they have same directions,\n\t * same number of ranges and all ranges from one selection equal to a range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\tif ( this.isFake != otherSelection.isFake ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isFake && this.fakeSelectionLabel != otherSelection.fakeSelectionLabel ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.rangeCount != otherSelection.rangeCount ) {\n\t\t\treturn false;\n\t\t} else if ( this.rangeCount === 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( !this.anchor.isEqual( otherSelection.anchor ) || !this.focus.isEqual( otherSelection.focus ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tfor ( const thisRange of this._ranges ) {\n\t\t\tlet found = false;\n\n\t\t\tfor ( const otherRange of otherSelection._ranges ) {\n\t\t\t\tif ( thisRange.isEqual( otherRange ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether this selection is similar to given selection. Selections are similar if they have same directions, same\n\t * number of ranges, and all {@link module:engine/view/range~Range#getTrimmed trimmed} ranges from one selection are\n\t * equal to any trimmed range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are similar, `false` otherwise.\n\t */\n\tisSimilar( otherSelection ) {\n\t\tif ( this.isBackward != otherSelection.isBackward ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst numOfRangesA = count( this.getRanges() );\n\t\tconst numOfRangesB = count( otherSelection.getRanges() );\n\n\t\t// If selections have different number of ranges, they cannot be similar.\n\t\tif ( numOfRangesA != numOfRangesB ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If both selections have no ranges, they are similar.\n\t\tif ( numOfRangesA == 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Check if each range in one selection has a similar range in other selection.\n\t\tfor ( let rangeA of this.getRanges() ) {\n\t\t\trangeA = rangeA.getTrimmed();\n\n\t\t\tlet found = false;\n\n\t\t\tfor ( let rangeB of otherSelection.getRanges() ) {\n\t\t\t\trangeB = rangeB.getTrimmed();\n\n\t\t\t\tif ( rangeA.start.isEqual( rangeB.start ) && rangeA.end.isEqual( rangeB.end ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// For `rangeA`, neither range in `otherSelection` was similar. So selections are not similar.\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// There were no ranges that weren't matched. Selections are similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/view/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/view/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\tif ( this.rangeCount !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst range = this.getFirstRange();\n\n\t\tlet nodeAfterStart = range.start.nodeAfter;\n\t\tlet nodeBeforeEnd = range.end.nodeBefore;\n\n\t\t// Handle the situation when selection position is at the beginning / at the end of a text node.\n\t\t// In such situation `.nodeAfter` and `.nodeBefore` are `null` but the selection still might be spanning\n\t\t// over one element.\n\t\t//\n\t\t// <p>Foo{<span class=\"widget\"></span>}bar</p> vs <p>Foo[<span class=\"widget\"></span>]bar</p>\n\t\t//\n\t\t// These are basically the same selections, only the difference is if the selection position is at\n\t\t// at the end/at the beginning of a text node or just before/just after the text node.\n\t\t//\n\t\tif ( range.start.parent.is( 'text' ) && range.start.isAtEnd && range.start.parent.nextSibling ) {\n\t\t\tnodeAfterStart = range.start.parent.nextSibling;\n\t\t}\n\n\t\tif ( range.end.parent.is( 'text' ) && range.end.isAtStart && range.end.parent.previousSibling ) {\n\t\t\tnodeBeforeEnd = range.end.parent.previousSibling;\n\t\t}\n\n\t\treturn ( nodeAfterStart instanceof Element && nodeAfterStart == nodeBeforeEnd ) ? nodeAfterStart : null;\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tselection.setTo( otherSelection );\n\t *\n\t *\t \t// Sets selection to contents of DocumentSelection.\n\t *\t\tselection.setTo( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, path );\n\t *\t\tselection.setTo( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tselection.setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t *\t\tselection.setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tselection.setTo( paragraph, 'on' );\n\t *\n\t * \t\t// Clears selection. Removes all ranges.\n\t *\t\tselection.setTo( null );\n\t *\n\t * `Selection#setTo()` method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\tselection.setTo( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tselection.setTo( range, { fake: true, label: 'foo' } );\n\t *\n\t * @fires change\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tsetTo( selectable, placeOrOffset, options ) {\n\t\tif ( selectable === null ) {\n\t\t\tthis._setRanges( [] );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Selection || selectable instanceof DocumentSelection ) {\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t\tthis._setFakeOptions( { fake: selectable.isFake, label: selectable.fakeSelectionLabel } );\n\t\t} else if ( selectable instanceof Range ) {\n\t\t\tthis._setRanges( [ selectable ], placeOrOffset && placeOrOffset.backward );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Position ) {\n\t\t\tthis._setRanges( [ new Range( selectable ) ] );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Node ) {\n\t\t\tconst backward = !!options && !!options.backward;\n\t\t\tlet range;\n\n\t\t\tif ( placeOrOffset === undefined ) {\n\t\t\t\t/**\n\t\t\t\t * selection.setTo requires the second parameter when the first parameter is a node.\n\t\t\t\t *\n\t\t\t\t * @error view-selection-setTo-required-second-parameter\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-selection-setTo-required-second-parameter: ' +\n\t\t\t\t\t'selection.setTo requires the second parameter when the first parameter is a node.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t} else if ( placeOrOffset == 'in' ) {\n\t\t\t\trange = Range._createIn( selectable );\n\t\t\t} else if ( placeOrOffset == 'on' ) {\n\t\t\t\trange = Range._createOn( selectable );\n\t\t\t} else {\n\t\t\t\trange = new Range( Position._createAt( selectable, placeOrOffset ) );\n\t\t\t}\n\n\t\t\tthis._setRanges( [ range ], backward );\n\t\t\tthis._setFakeOptions( options );\n\t\t} else if ( isIterable( selectable ) ) {\n\t\t\t// We assume that the selectable is an iterable of ranges.\n\t\t\t// Array.from() is used to prevent setting ranges to the old iterable\n\t\t\tthis._setRanges( selectable, placeOrOffset && placeOrOffset.backward );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else {\n\t\t\t/**\n\t\t\t * Cannot set selection to given place.\n\t\t\t *\n\t\t\t * @error view-selection-setTo-not-selectable\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-selection-setTo-not-selectable: Cannot set selection to given place.', this );\n\t\t}\n\n\t\tthis.fire( 'change' );\n\t}\n\n\t/**\n\t * Moves {@link #focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @fires change\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tsetFocus( itemOrPosition, offset ) {\n\t\tif ( this.anchor === null ) {\n\t\t\t/**\n\t\t\t * Cannot set selection focus if there are no ranges in selection.\n\t\t\t *\n\t\t\t * @error view-selection-setFocus-no-ranges\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst newFocus = Position._createAt( itemOrPosition, offset );\n\n\t\tif ( newFocus.compareWith( this.focus ) == 'same' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst anchor = this.anchor;\n\n\t\tthis._ranges.pop();\n\n\t\tif ( newFocus.compareWith( anchor ) == 'before' ) {\n\t\t\tthis._addRange( new Range( newFocus, anchor ), true );\n\t\t} else {\n\t\t\tthis._addRange( new Range( anchor, newFocus ) );\n\t\t}\n\n\t\tthis.fire( 'change' );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'view:selection' ); // -> true\n\t *\n\t *\t\tselection.is( 'model:selection' ); // -> false\n\t *\t\tselection.is( 'element' ); // -> false\n\t *\t\tselection.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' || type == 'view:selection';\n\t}\n\n\t/**\n\t * Replaces all ranges that were added to the selection with given array of ranges. Last range of the array\n\t * is treated like the last added range and is used to set {@link #anchor anchor} and {@link #focus focus}.\n\t * Accepts a flag describing in which way the selection is made.\n\t *\n\t * @private\n\t * @param {Iterable.<module:engine/view/range~Range>} newRanges Iterable object of ranges to set.\n\t * @param {Boolean} [isLastBackward=false] Flag describing if last added range was selected forward - from start to end\n\t * (`false`) or backward - from end to start (`true`). Defaults to `false`.\n\t */\n\t_setRanges( newRanges, isLastBackward = false ) {\n\t\t// New ranges should be copied to prevent removing them by setting them to `[]` first.\n\t\t// Only applies to situations when selection is set to the same selection or same selection's ranges.\n\t\tnewRanges = Array.from( newRanges );\n\n\t\tthis._ranges = [];\n\n\t\tfor ( const range of newRanges ) {\n\t\t\tthis._addRange( range );\n\t\t}\n\n\t\tthis._lastRangeBackward = !!isLastBackward;\n\t}\n\n\t/**\n\t * Sets this selection instance to be marked as `fake`. A fake selection does not render as browser native selection\n\t * over selected elements and is hidden to the user. This way, no native selection UI artifacts are displayed to\n\t * the user and selection over elements can be represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM (and be\n\t * properly handled by screen readers).\n\t *\n\t * @private\n\t * @param {Object} [options] Options.\n\t * @param {Boolean} [options.fake] If set to true selection will be marked as `fake`.\n\t * @param {String} [options.label=''] Fake selection label.\n\t */\n\t_setFakeOptions( options = {} ) {\n\t\tthis._isFake = !!options.fake;\n\t\tthis._fakeSelectionLabel = options.fake ? options.label || '' : '';\n\t}\n\n\t/**\n\t * Adds a range to the selection. Added range is copied. This means that passed range is not saved in the\n\t * selection instance and you can safely operate on it.\n\t *\n\t * Accepts a flag describing in which way the selection is made - passed range might be selected from\n\t * {@link module:engine/view/range~Range#start start} to {@link module:engine/view/range~Range#end end}\n\t * or from {@link module:engine/view/range~Range#end end} to {@link module:engine/view/range~Range#start start}.\n\t * The flag is used to set {@link #anchor anchor} and {@link #focus focus} properties.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-selection-range-intersects` if added range intersects\n\t * with ranges already stored in Selection instance.\n\t *\n\t * @private\n\t * @fires change\n\t * @param {module:engine/view/range~Range} range\n\t * @param {Boolean} [isBackward]\n\t */\n\t_addRange( range, isBackward = false ) {\n\t\tif ( !( range instanceof Range ) ) {\n\t\t\t/**\n\t\t\t * Selection range set to an object that is not an instance of {@link module:engine/view/range~Range}.\n\t\t\t *\n\t\t\t * @error view-selection-add-range-not-range\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-selection-add-range-not-range: ' +\n\t\t\t\t'Selection range set to an object that is not an instance of view.Range',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tthis._pushRange( range );\n\t\tthis._lastRangeBackward = !!isBackward;\n\t}\n\n\t/**\n\t * Adds range to selection - creates copy of given range so it can be safely used and modified.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-selection-range-intersects` if added range intersects\n\t * with ranges already stored in selection instance.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t */\n\t_pushRange( range ) {\n\t\tfor ( const storedRange of this._ranges ) {\n\t\t\tif ( range.isIntersecting( storedRange ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to add a range that intersects with another range from selection.\n\t\t\t\t *\n\t\t\t\t * @error view-selection-range-intersects\n\t\t\t\t * @param {module:engine/view/range~Range} addedRange Range that was added to the selection.\n\t\t\t\t * @param {module:engine/view/range~Range} intersectingRange Range from selection that intersects with `addedRange`.\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-selection-range-intersects: Trying to add a range that intersects with another range from selection.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ addedRange: range, intersectingRange: storedRange }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tthis._ranges.push( new Range( range.start, range.end ) );\n\t}\n\n\t/**\n\t * Fired whenever selection ranges are changed through {@link ~Selection Selection API}.\n\t *\n\t * @event change\n\t */\n}\n\nmix( Selection, EmitterMixin );\n\n/**\n * An entity that is used to set selection.\n *\n * See also {@link module:engine/view/selection~Selection#setTo}\n *\n * @typedef {\n * module:engine/view/selection~Selection|\n * module:engine/view/documentselection~DocumentSelection|\n * module:engine/view/position~Position|\n * Iterable.<module:engine/view/range~Range>|\n * module:engine/view/range~Range|\n * module:engine/view/item~Item|\n * null\n * } module:engine/view/selection~Selectable\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/documentselection\n */\n\nimport Selection from './selection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\n/**\n * Class representing the document selection in the view.\n *\n * Its instance is available in {@link module:engine/view/document~Document#selection `Document#selection`}.\n *\n * It is similar to {@link module:engine/view/selection~Selection} but\n * it has a read-only API and can be modified only by the writer available in\n * the {@link module:engine/view/view~View#change `View#change()`} block\n * (so via {@link module:engine/view/downcastwriter~DowncastWriter#setSelection `DowncastWriter#setSelection()`}).\n */\nexport default class DocumentSelection {\n\t/**\n\t * Creates new DocumentSelection instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = new DocumentSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = new DocumentSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\tconst selection = new DocumentSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = new DocumentSelection( otherSelection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, offset );\n\t *\t\tconst selection = new DocumentSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = new DocumentSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = new DocumentSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = new DocumentSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = new DocumentSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = new DocumentSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tconstructor( selectable = null, placeOrOffset, options ) {\n\t\t/**\n\t\t * Selection is used internally (`DocumentSelection` is a proxy to that selection).\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/selection~Selection}\n\t\t */\n\t\tthis._selection = new Selection();\n\n\t\t// Delegate change event to be fired on DocumentSelection instance.\n\t\tthis._selection.delegate( 'change' ).to( this );\n\n\t\t// Set selection data.\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Returns true if selection instance is marked as `fake`.\n\t *\n\t * @see #_setTo\n\t * @returns {Boolean}\n\t */\n\tget isFake() {\n\t\treturn this._selection.isFake;\n\t}\n\n\t/**\n\t * Returns fake selection label.\n\t *\n\t * @see #_setTo\n\t * @returns {String}\n\t */\n\tget fakeSelectionLabel() {\n\t\treturn this._selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the selection starts. Together with\n\t * {@link #focus focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always the start or end of the most recent added range.\n\t * It may be a bit unintuitive when there are multiple ranges in selection.\n\t *\n\t * @see #focus\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget anchor() {\n\t\treturn this._selection.anchor;\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * @see #anchor\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget focus() {\n\t\treturn this._selection.focus;\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this._selection.isCollapsed;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._selection.rangeCount;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus} precedes {@link #anchor}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn this._selection.isBackward;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this selection, or `null`\n\t * if the selection is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\treturn this._selection.editableElement;\n\t}\n\n\t/**\n\t * Used for the compatibility with the {@link module:engine/view/selection~Selection#isEqual} method.\n\t *\n\t * @protected\n\t */\n\tget _ranges() {\n\t\treturn this._selection._ranges;\n\t}\n\n\t/**\n\t * Returns an iterable that contains copies of all ranges added to the selection.\n\t *\n\t * @returns {Iterable.<module:engine/view/range~Range>}\n\t */\n\t* getRanges() {\n\t\tyield* this._selection.getRanges();\n\t}\n\n\t/**\n\t * Returns copy of the first range in the selection. First range is the one which\n\t * {@link module:engine/view/range~Range#start start} position {@link module:engine/view/position~Position#isBefore is before} start\n\t * position of all other ranges (not to confuse with the first range added to the selection).\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\treturn this._selection.getFirstRange();\n\t}\n\n\t/**\n\t * Returns copy of the last range in the selection. Last range is the one which {@link module:engine/view/range~Range#end end}\n\t * position {@link module:engine/view/position~Position#isAfter is after} end position of all other ranges (not to confuse\n\t * with the last range added to the selection). Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\treturn this._selection.getLastRange();\n\t}\n\n\t/**\n\t * Returns copy of the first position in the selection. First position is the position that\n\t * {@link module:engine/view/position~Position#isBefore is before} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\treturn this._selection.getFirstPosition();\n\t}\n\n\t/**\n\t * Returns copy of the last position in the selection. Last position is the position that\n\t * {@link module:engine/view/position~Position#isAfter is after} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\treturn this._selection.getLastPosition();\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/view/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/view/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\treturn this._selection.getSelectedElement();\n\t}\n\n\t/**\n\t * Checks whether, this selection is equal to given selection. Selections are equal if they have same directions,\n\t * same number of ranges and all ranges from one selection equal to a range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\treturn this._selection.isEqual( otherSelection );\n\t}\n\n\t/**\n\t * Checks whether this selection is similar to given selection. Selections are similar if they have same directions, same\n\t * number of ranges, and all {@link module:engine/view/range~Range#getTrimmed trimmed} ranges from one selection are\n\t * equal to any trimmed range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are similar, `false` otherwise.\n\t */\n\tisSimilar( otherSelection ) {\n\t\treturn this._selection.isSimilar( otherSelection );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocSelection.is( 'selection' ); // -> true\n\t *\t\tdocSelection.is( 'documentSelection' ); // -> true\n\t *\t\tdocSelection.is( 'view:selection' ); // -> true\n\t *\t\tdocSelection.is( 'view:documentSelection' ); // -> true\n\t *\n\t *\t\tdocSelection.is( 'model:documentSelection' ); // -> false\n\t *\t\tdocSelection.is( 'element' ); // -> false\n\t *\t\tdocSelection.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' ||\n\t\t\ttype == 'documentSelection' ||\n\t\t\ttype == 'view:selection' ||\n\t\t\ttype == 'view:documentSelection';\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tdocumentSelection._setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\tdocumentSelection._setTo( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tdocumentSelection._setTo( otherSelection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, offset );\n\t *\t\tdocumentSelection._setTo( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tdocumentSelection._setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t *\t\tdocumentSelection._setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tdocumentSelection._setTo( paragraph, 'on' );\n\t *\n\t * \t\t// Clears selection. Removes all ranges.\n\t *\t\tdocumentSelection._setTo( null );\n\t *\n\t * `Selection#_setTo()` method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\tdocumentSelection._setTo( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to des cribe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tdocumentSelection._setTo( range, { fake: true, label: 'foo' } );\n\t *\n\t * @protected\n\t * @fires change\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\t_setTo( selectable, placeOrOffset, options ) {\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link #focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @protected\n\t * @fires change\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\t_setFocus( itemOrPosition, offset ) {\n\t\tthis._selection.setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Fired whenever selection ranges are changed through {@link ~DocumentSelection Selection API}.\n\t *\n\t * @event change\n\t */\n}\n\nmix( DocumentSelection, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/collection\n */\n\nimport EmitterMixin from './emittermixin';\nimport CKEditorError from './ckeditorerror';\nimport uid from './uid';\nimport mix from './mix';\n\n/**\n * Collections are ordered sets of objects. Items in the collection can be retrieved by their indexes\n * in the collection (like in an array) or by their ids.\n *\n * If an object without an `id` property is being added to the collection, the `id` property will be generated\n * automatically. Note that the automatically generated id is unique only within this single collection instance.\n *\n * By default an item in the collection is identified by its `id` property. The name of the identifier can be\n * configured through the constructor of the collection.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Collection {\n\t/**\n\t * Creates a new Collection instance.\n\t *\n\t * @param {Object} [options={}] The options object.\n\t * @param {String} [options.idProperty='id'] The name of the property which is considered to identify an item.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The internal list of items in the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Object[]}\n\t\t */\n\t\tthis._items = [];\n\n\t\t/**\n\t\t * The internal map of items in the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._itemMap = new Map();\n\n\t\t/**\n\t\t * The name of the property which is considered to identify an item.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._idProperty = options.idProperty || 'id';\n\n\t\t/**\n\t\t * A helper mapping external items of a bound collection ({@link #bindTo})\n\t\t * and actual items of this collection. It provides information\n\t\t * necessary to properly remove items bound to another collection.\n\t\t *\n\t\t * See {@link #_bindToInternalToExternalMap}.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._bindToExternalToInternalMap = new WeakMap();\n\n\t\t/**\n\t\t * A helper mapping items of this collection to external items of a bound collection\n\t\t * ({@link #bindTo}). It provides information necessary to manage the bindings, e.g.\n\t\t * to avoid loops in two–way bindings.\n\t\t *\n\t\t * See {@link #_bindToExternalToInternalMap}.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._bindToInternalToExternalMap = new WeakMap();\n\n\t\t/**\n\t\t * Stores indexes of skipped items from bound external collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Array}\n\t\t */\n\t\tthis._skippedIndexesFromExternal = [];\n\n\t\t/**\n\t\t * A collection instance this collection is bound to as a result\n\t\t * of calling {@link #bindTo} method.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/collection~Collection} #_bindToCollection\n\t\t */\n\t}\n\n\t/**\n\t * The number of items available in the collection.\n\t *\n\t * @member {Number} #length\n\t */\n\tget length() {\n\t\treturn this._items.length;\n\t}\n\n\t/**\n\t * Returns the first item from the collection or null when collection is empty.\n\t *\n\t * @returns {Object|null} The first item or `null` if collection is empty.\n\t */\n\tget first() {\n\t\treturn this._items[ 0 ] || null;\n\t}\n\n\t/**\n\t * Returns the last item from the collection or null when collection is empty.\n\t *\n\t * @returns {Object|null} The last item or `null` if collection is empty.\n\t */\n\tget last() {\n\t\treturn this._items[ this.length - 1 ] || null;\n\t}\n\n\t/**\n\t * Adds an item into the collection.\n\t *\n\t * If the item does not have an id, then it will be automatically generated and set on the item.\n\t *\n\t * @chainable\n\t * @param {Object} item\n\t * @param {Number} [index] The position of the item in the collection. The item\n\t * is pushed to the collection when `index` not specified.\n\t * @fires add\n\t */\n\tadd( item, index ) {\n\t\tlet itemId;\n\t\tconst idProperty = this._idProperty;\n\n\t\tif ( ( idProperty in item ) ) {\n\t\t\titemId = item[ idProperty ];\n\n\t\t\tif ( typeof itemId != 'string' ) {\n\t\t\t\t/**\n\t\t\t\t * This item's id should be a string.\n\t\t\t\t *\n\t\t\t\t * @error collection-add-invalid-id\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'collection-add-invalid-id', this );\n\t\t\t}\n\n\t\t\tif ( this.get( itemId ) ) {\n\t\t\t\t/**\n\t\t\t\t * This item already exists in the collection.\n\t\t\t\t *\n\t\t\t\t * @error collection-add-item-already-exists\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'collection-add-item-already-exists', this );\n\t\t\t}\n\t\t} else {\n\t\t\titem[ idProperty ] = itemId = uid();\n\t\t}\n\n\t\t// TODO: Use ES6 default function argument.\n\t\tif ( index === undefined ) {\n\t\t\tindex = this._items.length;\n\t\t} else if ( index > this._items.length || index < 0 ) {\n\t\t\t/**\n\t\t\t * The index number has invalid value.\n\t\t\t *\n\t\t\t * @error collection-add-item-bad-index\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-add-item-invalid-index', this );\n\t\t}\n\n\t\tthis._items.splice( index, 0, item );\n\n\t\tthis._itemMap.set( itemId, item );\n\n\t\tthis.fire( 'add', item, index );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Gets item by its id or index.\n\t *\n\t * @param {String|Number} idOrIndex The item id or index in the collection.\n\t * @returns {Object|null} The requested item or `null` if such item does not exist.\n\t */\n\tget( idOrIndex ) {\n\t\tlet item;\n\n\t\tif ( typeof idOrIndex == 'string' ) {\n\t\t\titem = this._itemMap.get( idOrIndex );\n\t\t} else if ( typeof idOrIndex == 'number' ) {\n\t\t\titem = this._items[ idOrIndex ];\n\t\t} else {\n\t\t\t/**\n\t\t\t * Index or id must be given.\n\t\t\t *\n\t\t\t * @error collection-get-invalid-arg\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-get-invalid-arg: Index or id must be given.', this );\n\t\t}\n\n\t\treturn item || null;\n\t}\n\n\t/**\n\t * Returns a boolean indicating whether the collection contains an item.\n\t *\n\t * @param {Object|String} itemOrId The item or its id in the collection.\n\t * @returns {Boolean} `true` if the collection contains the item, `false` otherwise.\n\t */\n\thas( itemOrId ) {\n\t\tif ( typeof itemOrId == 'string' ) {\n\t\t\treturn this._itemMap.has( itemOrId );\n\t\t} else { // Object\n\t\t\tconst idProperty = this._idProperty;\n\t\t\tconst id = itemOrId[ idProperty ];\n\n\t\t\treturn this._itemMap.has( id );\n\t\t}\n\t}\n\n\t/**\n\t * Gets index of item in the collection.\n\t * When item is not defined in the collection then index will be equal -1.\n\t *\n\t * @param {Object|String} itemOrId The item or its id in the collection.\n\t * @returns {Number} Index of given item.\n\t */\n\tgetIndex( itemOrId ) {\n\t\tlet item;\n\n\t\tif ( typeof itemOrId == 'string' ) {\n\t\t\titem = this._itemMap.get( itemOrId );\n\t\t} else {\n\t\t\titem = itemOrId;\n\t\t}\n\n\t\treturn this._items.indexOf( item );\n\t}\n\n\t/**\n\t * Removes an item from the collection.\n\t *\n\t * @param {Object|Number|String} subject The item to remove, its id or index in the collection.\n\t * @returns {Object} The removed item.\n\t * @fires remove\n\t */\n\tremove( subject ) {\n\t\tlet index, id, item;\n\t\tlet itemDoesNotExist = false;\n\t\tconst idProperty = this._idProperty;\n\n\t\tif ( typeof subject == 'string' ) {\n\t\t\tid = subject;\n\t\t\titem = this._itemMap.get( id );\n\t\t\titemDoesNotExist = !item;\n\n\t\t\tif ( item ) {\n\t\t\t\tindex = this._items.indexOf( item );\n\t\t\t}\n\t\t} else if ( typeof subject == 'number' ) {\n\t\t\tindex = subject;\n\t\t\titem = this._items[ index ];\n\t\t\titemDoesNotExist = !item;\n\n\t\t\tif ( item ) {\n\t\t\t\tid = item[ idProperty ];\n\t\t\t}\n\t\t} else {\n\t\t\titem = subject;\n\t\t\tid = item[ idProperty ];\n\t\t\tindex = this._items.indexOf( item );\n\t\t\titemDoesNotExist = ( index == -1 || !this._itemMap.get( id ) );\n\t\t}\n\n\t\tif ( itemDoesNotExist ) {\n\t\t\t/**\n\t\t\t * Item not found.\n\t\t\t *\n\t\t\t * @error collection-remove-404\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-remove-404: Item not found.', this );\n\t\t}\n\n\t\tthis._items.splice( index, 1 );\n\t\tthis._itemMap.delete( id );\n\n\t\tconst externalItem = this._bindToInternalToExternalMap.get( item );\n\t\tthis._bindToInternalToExternalMap.delete( item );\n\t\tthis._bindToExternalToInternalMap.delete( externalItem );\n\n\t\tthis.fire( 'remove', item, index );\n\n\t\treturn item;\n\t}\n\n\t/**\n\t * Executes the callback for each item in the collection and composes an array or values returned by this callback.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Array} The result of mapping.\n\t */\n\tmap( callback, ctx ) {\n\t\treturn this._items.map( callback, ctx );\n\t}\n\n\t/**\n\t * Finds the first item in the collection for which the `callback` returns a true value.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Object} The item for which `callback` returned a true value.\n\t */\n\tfind( callback, ctx ) {\n\t\treturn this._items.find( callback, ctx );\n\t}\n\n\t/**\n\t * Returns an array with items for which the `callback` returned a true value.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Object[]} The array with matching items.\n\t */\n\tfilter( callback, ctx ) {\n\t\treturn this._items.filter( callback, ctx );\n\t}\n\n\t/**\n\t * Removes all items from the collection and destroys the binding created using\n\t * {@link #bindTo}.\n\t */\n\tclear() {\n\t\tif ( this._bindToCollection ) {\n\t\t\tthis.stopListening( this._bindToCollection );\n\t\t\tthis._bindToCollection = null;\n\t\t}\n\n\t\twhile ( this.length ) {\n\t\t\tthis.remove( 0 );\n\t\t}\n\t}\n\n\t/**\n\t * Binds and synchronizes the collection with another one.\n\t *\n\t * The binding can be a simple factory:\n\t *\n\t *\t\tclass FactoryClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).as( FactoryClass );\n\t *\n\t *\t\tsource.add( { label: 'foo' } );\n\t *\t\tsource.add( { label: 'bar' } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 1 ).label ); // 'bar'\n\t *\n\t *\t\tsource.remove( 0 );\n\t *\t\tconsole.log( target.length ); // 1\n\t *\t\tconsole.log( target.get( 0 ).label ); // 'bar'\n\t *\n\t * or the factory driven by a custom callback:\n\t *\n\t *\t\tclass FooClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tclass BarClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( ( item ) => {\n\t *\t\t\tif ( item.label == 'foo' ) {\n\t *\t\t\t\treturn new FooClass( item );\n\t *\t\t\t} else {\n\t *\t\t\t\treturn new BarClass( item );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\tsource.add( { label: 'foo' } );\n\t *\t\tsource.add( { label: 'bar' } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 0 ) instanceof FooClass ); // true\n\t *\t\tconsole.log( target.get( 1 ) instanceof BarClass ); // true\n\t *\n\t * or the factory out of property name:\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( 'label' );\n\t *\n\t *\t\tsource.add( { label: { value: 'foo' } } );\n\t *\t\tsource.add( { label: { value: 'bar' } } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 0 ).value ); // 'foo'\n\t *\t\tconsole.log( target.get( 1 ).value ); // 'bar'\n\t *\n\t * It's possible to skip specified items by returning falsy value:\n\t *\n\t *\t\tconst source = new Collection();\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( item => {\n\t *\t\t\tif ( item.hidden ) {\n\t *\t\t\t\treturn null;\n\t *\t\t\t}\n\t *\n\t *\t\t\treturn item;\n\t *\t\t} );\n\t *\n\t *\t\tsource.add( { hidden: true } );\n\t *\t\tsource.add( { hidden: false } );\n\t *\n\t *\t\tconsole.log( source.length ); // 2\n\t *\t\tconsole.log( target.length ); // 1\n\t *\n\t * **Note**: {@link #clear} can be used to break the binding.\n\t *\n\t * @param {module:utils/collection~Collection} externalCollection A collection to be bound.\n\t * @returns {Object}\n\t * @returns {module:utils/collection~CollectionBindToChain} The binding chain object.\n\t */\n\tbindTo( externalCollection ) {\n\t\tif ( this._bindToCollection ) {\n\t\t\t/**\n\t\t\t * The collection cannot be bound more than once.\n\t\t\t *\n\t\t\t * @error collection-bind-to-rebind\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-bind-to-rebind: The collection cannot be bound more than once.', this );\n\t\t}\n\n\t\tthis._bindToCollection = externalCollection;\n\n\t\treturn {\n\t\t\tas: Class => {\n\t\t\t\tthis._setUpBindToBinding( item => new Class( item ) );\n\t\t\t},\n\n\t\t\tusing: callbackOrProperty => {\n\t\t\t\tif ( typeof callbackOrProperty == 'function' ) {\n\t\t\t\t\tthis._setUpBindToBinding( item => callbackOrProperty( item ) );\n\t\t\t\t} else {\n\t\t\t\t\tthis._setUpBindToBinding( item => item[ callbackOrProperty ] );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Finalizes and activates a binding initiated by {#bindTo}.\n\t *\n\t * @protected\n\t * @param {Function} factory A function which produces collection items.\n\t */\n\t_setUpBindToBinding( factory ) {\n\t\tconst externalCollection = this._bindToCollection;\n\n\t\t// Adds the item to the collection once a change has been done to the external collection.\n\t\t//\n\t\t// @private\n\t\tconst addItem = ( evt, externalItem, index ) => {\n\t\t\tconst isExternalBoundToThis = externalCollection._bindToCollection == this;\n\t\t\tconst externalItemBound = externalCollection._bindToInternalToExternalMap.get( externalItem );\n\n\t\t\t// If an external collection is bound to this collection, which makes it a 2–way binding,\n\t\t\t// and the particular external collection item is already bound, don't add it here.\n\t\t\t// The external item has been created **out of this collection's item** and (re)adding it will\n\t\t\t// cause a loop.\n\t\t\tif ( isExternalBoundToThis && externalItemBound ) {\n\t\t\t\tthis._bindToExternalToInternalMap.set( externalItem, externalItemBound );\n\t\t\t\tthis._bindToInternalToExternalMap.set( externalItemBound, externalItem );\n\t\t\t} else {\n\t\t\t\tconst item = factory( externalItem );\n\n\t\t\t\t// When there is no item we need to remember skipped index first and then we can skip this item.\n\t\t\t\tif ( !item ) {\n\t\t\t\t\tthis._skippedIndexesFromExternal.push( index );\n\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Lets try to put item at the same index as index in external collection\n\t\t\t\t// but when there are a skipped items in one or both collections we need to recalculate this index.\n\t\t\t\tlet finalIndex = index;\n\n\t\t\t\t// When we try to insert item after some skipped items from external collection we need\n\t\t\t\t// to include this skipped items and decrease index.\n\t\t\t\t//\n\t\t\t\t// For the following example:\n\t\t\t\t// external -> [ 'A', 'B - skipped for internal', 'C - skipped for internal' ]\n\t\t\t\t// internal -> [ A ]\n\t\t\t\t//\n\t\t\t\t// Another item is been added at the end of external collection:\n\t\t\t\t// external.add( 'D' )\n\t\t\t\t// external -> [ 'A', 'B - skipped for internal', 'C - skipped for internal', 'D' ]\n\t\t\t\t//\n\t\t\t\t// We can't just add 'D' to internal at the same index as index in external because\n\t\t\t\t// this will produce empty indexes what is invalid:\n\t\t\t\t// internal -> [ 'A', empty, empty, 'D' ]\n\t\t\t\t//\n\t\t\t\t// So we need to include skipped items and decrease index\n\t\t\t\t// internal -> [ 'A', 'D' ]\n\t\t\t\tfor ( const skipped of this._skippedIndexesFromExternal ) {\n\t\t\t\t\tif ( index > skipped ) {\n\t\t\t\t\t\tfinalIndex--;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// We need to take into consideration that external collection could skip some items from\n\t\t\t\t// internal collection.\n\t\t\t\t//\n\t\t\t\t// For the following example:\n\t\t\t\t// internal -> [ 'A', 'B - skipped for external', 'C - skipped for external' ]\n\t\t\t\t// external -> [ A ]\n\t\t\t\t//\n\t\t\t\t// Another item is been added at the end of external collection:\n\t\t\t\t// external.add( 'D' )\n\t\t\t\t// external -> [ 'A', 'D' ]\n\t\t\t\t//\n\t\t\t\t// We need to include skipped items and place new item after them:\n\t\t\t\t// internal -> [ 'A', 'B - skipped for external', 'C - skipped for external', 'D' ]\n\t\t\t\tfor ( const skipped of externalCollection._skippedIndexesFromExternal ) {\n\t\t\t\t\tif ( finalIndex >= skipped ) {\n\t\t\t\t\t\tfinalIndex++;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tthis._bindToExternalToInternalMap.set( externalItem, item );\n\t\t\t\tthis._bindToInternalToExternalMap.set( item, externalItem );\n\t\t\t\tthis.add( item, finalIndex );\n\n\t\t\t\t// After adding new element to internal collection we need update indexes\n\t\t\t\t// of skipped items in external collection.\n\t\t\t\tfor ( let i = 0; i < externalCollection._skippedIndexesFromExternal.length; i++ ) {\n\t\t\t\t\tif ( finalIndex <= externalCollection._skippedIndexesFromExternal[ i ] ) {\n\t\t\t\t\t\texternalCollection._skippedIndexesFromExternal[ i ]++;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\t// Load the initial content of the collection.\n\t\tfor ( const externalItem of externalCollection ) {\n\t\t\taddItem( null, externalItem, externalCollection.getIndex( externalItem ) );\n\t\t}\n\n\t\t// Synchronize the with collection as new items are added.\n\t\tthis.listenTo( externalCollection, 'add', addItem );\n\n\t\t// Synchronize the with collection as new items are removed.\n\t\tthis.listenTo( externalCollection, 'remove', ( evt, externalItem, index ) => {\n\t\t\tconst item = this._bindToExternalToInternalMap.get( externalItem );\n\n\t\t\tif ( item ) {\n\t\t\t\tthis.remove( item );\n\t\t\t}\n\n\t\t\t// After removing element from external collection we need update/remove indexes\n\t\t\t// of skipped items in internal collection.\n\t\t\tthis._skippedIndexesFromExternal = this._skippedIndexesFromExternal.reduce( ( result, skipped ) => {\n\t\t\t\tif ( index < skipped ) {\n\t\t\t\t\tresult.push( skipped - 1 );\n\t\t\t\t}\n\n\t\t\t\tif ( index > skipped ) {\n\t\t\t\t\tresult.push( skipped );\n\t\t\t\t}\n\n\t\t\t\treturn result;\n\t\t\t}, [] );\n\t\t} );\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._items[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Fired when an item is added to the collection.\n\t *\n\t * @event add\n\t * @param {Object} item The added item.\n\t */\n\n\t/**\n\t * Fired when an item is removed from the collection.\n\t *\n\t * @event remove\n\t * @param {Object} item The removed item.\n\t * @param {Number} index Index from which item was removed.\n\t */\n}\n\nmix( Collection, EmitterMixin );\n\n/**\n * An object returned by the {@link module:utils/collection~Collection#bindTo `bindTo()`} method\n * providing functions that specify the type of the binding.\n *\n * See the {@link module:utils/collection~Collection#bindTo `bindTo()`} documentation for examples.\n *\n * @interface module:utils/collection~CollectionBindToChain\n */\n\n/**\n * Creates a callback or a property binding.\n *\n * @method #using\n * @param {Function|String} callbackOrProperty When the function is passed, it should return\n * the collection items. When the string is provided, the property value is used to create the bound collection items.\n */\n\n/**\n * Creates the class factory binding in which items of the source collection are passed to\n * the constructor of the specified class.\n *\n * @method #as\n * @param {Function} Class The class constructor used to create instances in the factory.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/document\n */\n\nimport DocumentSelection from './documentselection';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\n\n// @if CK_DEBUG_ENGINE // const { logDocument } = require( '../dev-utils/utils' );\n\n/**\n * Document class creates an abstract layer over the content editable area, contains a tree of view elements and\n * {@link module:engine/view/documentselection~DocumentSelection view selection} associated with this document.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Document {\n\t/**\n\t * Creates a Document instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Selection done on this document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection} module:engine/view/document~Document#selection\n\t\t */\n\t\tthis.selection = new DocumentSelection();\n\n\t\t/**\n\t\t * Roots of the view tree. Collection of the {@link module:engine/view/element~Element view elements}.\n\t\t *\n\t\t * View roots are created as a result of binding between {@link module:engine/view/document~Document#roots} and\n\t\t * {@link module:engine/model/document~Document#roots} and this is handled by\n\t\t * {@link module:engine/controller/editingcontroller~EditingController}, so to create view root we need to create\n\t\t * model root using {@link module:engine/model/document~Document#createRoot}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/collection~Collection} module:engine/view/document~Document#roots\n\t\t */\n\t\tthis.roots = new Collection( { idProperty: 'rootName' } );\n\n\t\t/**\n\t\t * Defines whether document is in read-only mode.\n\t\t *\n\t\t * When document is read-ony then all roots are read-only as well and caret placed inside this root is hidden.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * True if document is focused.\n\t\t *\n\t\t * This property is updated by the {@link module:engine/view/observer/focusobserver~FocusObserver}.\n\t\t * If the {@link module:engine/view/observer/focusobserver~FocusObserver} is disabled this property will not change.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/document~Document#isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * True if composition is in progress inside the document.\n\t\t *\n\t\t * This property is updated by the {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n\t\t * If the {@link module:engine/view/observer/compositionobserver~CompositionObserver} is disabled this property will not change.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/document~Document#isComposing\n\t\t */\n\t\tthis.set( 'isComposing', false );\n\n\t\t/**\n\t\t * Post-fixer callbacks registered to the view document.\n\t\t *\n\t\t * @private\n\t\t * @member {Set}\n\t\t */\n\t\tthis._postFixers = new Set();\n\t}\n\n\t/**\n\t * Gets a {@link module:engine/view/document~Document#roots view root element} with the specified name. If the name is not\n\t * specific \"main\" root is returned.\n\t *\n\t * @param {String} [name='main'] Name of the root.\n\t * @returns {module:engine/view/rooteditableelement~RootEditableElement|null} The view root element with the specified name\n\t * or null when there is no root of given name.\n\t */\n\tgetRoot( name = 'main' ) {\n\t\treturn this.roots.get( name );\n\t}\n\n\t/**\n\t * Allows registering post-fixer callbacks. A post-fixers mechanism allows to update the view tree just before it is rendered\n\t * to the DOM.\n\t *\n\t * Post-fixers are executed right after all changes from the outermost change block were applied but\n\t * before the {@link module:engine/view/view~View#event:render render event} is fired. If a post-fixer callback made\n\t * a change, it should return `true`. When this happens, all post-fixers are fired again to check if something else should\n\t * not be fixed in the new document tree state.\n\t *\n\t * View post-fixers are useful when you want to apply some fixes whenever the view structure changes. Keep in mind that\n\t * changes executed in a view post-fixer should not break model-view mapping.\n\t *\n\t * The types of changes which should be safe:\n\t *\n\t * * adding or removing attribute from elements,\n\t * * changes inside of {@link module:engine/view/uielement~UIElement UI elements},\n\t * * {@link module:engine/model/differ~Differ#refreshItem marking some of the model elements to be re-converted}.\n\t *\n\t * Try to avoid changes which touch view structure:\n\t *\n\t * * you should not add or remove nor wrap or unwrap any view elements,\n\t * * you should not change the editor data model in a view post-fixer.\n\t *\n\t * As a parameter, a post-fixer callback receives a {@link module:engine/view/downcastwriter~DowncastWriter downcast writer}.\n\t *\n\t * Typically, a post-fixer will look like this:\n\t *\n\t *\t\teditor.editing.view.document.registerPostFixer( writer => {\n\t *\t\t\tif ( checkSomeCondition() ) {\n\t *\t\t\t\twriter.doSomething();\n\t *\n\t *\t\t\t\t// Let other post-fixers know that something changed.\n\t *\t\t\t\treturn true;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Note that nothing happens right after you register a post-fixer (e.g. execute such a code in the console).\n\t * That is because adding a post-fixer does not execute it.\n\t * The post-fixer will be executed as soon as any change in the document needs to cause its rendering.\n\t * If you want to re-render the editor's view after registering the post-fixer then you should do it manually by calling\n\t * {@link module:engine/view/view~View#forceRender `view.forceRender()`}.\n\t *\n\t * If you need to register a callback which is executed when DOM elements are already updated,\n\t * use {@link module:engine/view/view~View#event:render render event}.\n\t *\n\t * @param {Function} postFixer\n\t */\n\tregisterPostFixer( postFixer ) {\n\t\tthis._postFixers.add( postFixer );\n\t}\n\n\t/**\n\t * Destroys this instance. Makes sure that all observers are destroyed and listeners removed.\n\t */\n\tdestroy() {\n\t\tthis.roots.map( root => root.destroy() );\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Performs post-fixer loops. Executes post-fixer callbacks as long as none of them has done any changes to the model.\n\t *\n\t * @protected\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\t_callPostFixers( writer ) {\n\t\tlet wasFixed = false;\n\n\t\tdo {\n\t\t\tfor ( const callback of this._postFixers ) {\n\t\t\t\twasFixed = callback( writer );\n\n\t\t\t\tif ( wasFixed ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} while ( wasFixed );\n\t}\n\n\t/**\n\t * Event fired whenever document content layout changes. It is fired whenever content is\n\t * {@link module:engine/view/view~View#event:render rendered}, but should be also fired by observers in case of\n\t * other actions which may change layout, for instance when image loads.\n\t *\n\t * @event layoutChanged\n\t */\n\n\t// @if CK_DEBUG_ENGINE // log( version ) {\n\t// @if CK_DEBUG_ENGINE //\tlogDocument( this, version );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( Document, ObservableMixin );\n\n/**\n * Enum representing type of the change.\n *\n * Possible values:\n *\n * * `children` - for child list changes,\n * * `attributes` - for element attributes changes,\n * * `text` - for text nodes changes.\n *\n * @typedef {String} module:engine/view/document~ChangeType\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/attributeelement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// Default attribute priority.\nconst DEFAULT_PRIORITY = 10;\n\n/**\n * Attribute elements are used to represent formatting elements in the view (think – `<b>`, `<span style=\"font-size: 2em\">`, etc.).\n * Most often they are created when downcasting model text attributes.\n *\n * Editing engine does not define a fixed HTML DTD. This is why a feature developer needs to choose between various\n * types (container element, {@link module:engine/view/attributeelement~AttributeElement attribute element},\n * {@link module:engine/view/emptyelement~EmptyElement empty element}, etc) when developing a feature.\n *\n * To create a new attribute element instance use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createAttributeElement `DowncastWriter#createAttributeElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class AttributeElement extends Element {\n\t/**\n\t * Creates an attribute element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createAttributeElement\n\t * @see module:engine/view/element~Element\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\n\t\t/**\n\t\t * Element priority. Decides in what order elements are wrapped by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Number}\n\t\t */\n\t\tthis._priority = DEFAULT_PRIORITY;\n\n\t\t/**\n\t\t * Element identifier. If set, it is used by {@link module:engine/view/element~Element#isSimilar},\n\t\t * and then two elements are considered similar if, and only if they have the same `_id`.\n\t\t *\n\t\t * @protected\n\t\t * @member {String|Number}\n\t\t */\n\t\tthis._id = null;\n\n\t\t/**\n\t\t * Keeps all the attribute elements that have the same {@link module:engine/view/attributeelement~AttributeElement#id ids}\n\t\t * and still exist in the view tree.\n\t\t *\n\t\t * This property is managed by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set.<module:engine/view/attributeelement~AttributeElement>|null}\n\t\t */\n\t\tthis._clonesGroup = null;\n\t}\n\n\t/**\n\t * Element priority. Decides in what order elements are wrapped by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget priority() {\n\t\treturn this._priority;\n\t}\n\n\t/**\n\t * Element identifier. If set, it is used by {@link module:engine/view/element~Element#isSimilar},\n\t * and then two elements are considered similar if, and only if they have the same `id`.\n\t *\n\t * @readonly\n\t * @type {String|Number}\n\t */\n\tget id() {\n\t\treturn this._id;\n\t}\n\n\t/**\n\t * Returns all {@link module:engine/view/attributeelement~AttributeElement attribute elements} that has the\n\t * same {@link module:engine/view/attributeelement~AttributeElement#id id} and are in the view tree (were not removed).\n\t *\n\t * Note: If this element has been removed from the tree, returned set will not include it.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError attribute-element-get-elements-with-same-id-no-id}\n\t * if this element has no `id`.\n\t *\n\t * @returns {Set.<module:engine/view/attributeelement~AttributeElement>} Set containing all the attribute elements\n\t * with the same `id` that were added and not removed from the view tree.\n\t */\n\tgetElementsWithSameId() {\n\t\tif ( this.id === null ) {\n\t\t\t/**\n\t\t\t * Cannot get elements with the same id for an attribute element without id.\n\t\t\t *\n\t\t\t * @error attribute-element-get-elements-with-same-id-no-id\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'attribute-element-get-elements-with-same-id-no-id: ' +\n\t\t\t\t'Cannot get elements with the same id for an attribute element without id.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\treturn new Set( this._clonesGroup );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tattributeElement.is( 'attributeElement' ); // -> true\n\t *\t\tattributeElement.is( 'element' ); // -> true\n\t *\t\tattributeElement.is( 'node' ); // -> true\n\t *\t\tattributeElement.is( 'view:attributeElement' ); // -> true\n\t *\t\tattributeElement.is( 'view:element' ); // -> true\n\t *\t\tattributeElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tattributeElement.is( 'model:element' ); // -> false\n\t *\t\tattributeElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an attribute element, you can also check its\n\t * {@link module:engine/view/attributeelement~AttributeElement#name name}:\n\t *\n\t *\t\tattributeElement.is( 'b' ); // -> true if this is a bold element\n\t *\t\tattributeElement.is( 'attributeElement', 'b' ); // -> same as above\n\t *\t\ttext.is( 'b' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'attributeElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'attributeElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Checks if this element is similar to other element.\n\t *\n\t * If none of elements has set {@link module:engine/view/attributeelement~AttributeElement#id}, then both elements\n\t * should have the same name, attributes and priority to be considered as similar. Two similar elements can contain\n\t * different set of children nodes.\n\t *\n\t * If at least one element has {@link module:engine/view/attributeelement~AttributeElement#id} set, then both\n\t * elements have to have the same {@link module:engine/view/attributeelement~AttributeElement#id} value to be\n\t * considered similar.\n\t *\n\t * Similarity is important for {@link module:engine/view/downcastwriter~DowncastWriter}. For example:\n\t *\n\t * * two following similar elements can be merged together into one, longer element,\n\t * * {@link module:engine/view/downcastwriter~DowncastWriter#unwrap} checks similarity of passed element and processed element to\n\t * decide whether processed element should be unwrapped,\n\t * * etc.\n\t *\n\t * @param {module:engine/view/element~Element} otherElement\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherElement ) {\n\t\t// If any element has an `id` set, just compare the ids.\n\t\tif ( this.id !== null || otherElement.id !== null ) {\n\t\t\treturn this.id === otherElement.id;\n\t\t}\n\n\t\treturn super.isSimilar( otherElement ) && this.priority == otherElement.priority;\n\t}\n\n\t/**\n\t * Clones provided element with priority.\n\t *\n\t * @protected\n\t * @param {Boolean} deep If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/attributeelement~AttributeElement} Clone of this element.\n\t */\n\t_clone( deep ) {\n\t\tconst cloned = super._clone( deep );\n\n\t\t// Clone priority too.\n\t\tcloned._priority = this._priority;\n\n\t\t// And id too.\n\t\tcloned._id = this._id;\n\n\t\treturn cloned;\n\t}\n}\n\n/**\n * Default attribute priority.\n *\n * @member {Number} module:engine/view/attributeelement~AttributeElement.DEFAULT_PRIORITY\n */\nAttributeElement.DEFAULT_PRIORITY = DEFAULT_PRIORITY;\n\n// Returns block {@link module:engine/view/filler~Filler filler} offset or `null` if block filler is not needed.\n//\n// @returns {Number|null} Block filler offset or `null` if block filler is not needed.\nfunction getFillerOffset() {\n\t// <b>foo</b> does not need filler.\n\tif ( nonUiChildrenCount( this ) ) {\n\t\treturn null;\n\t}\n\n\tlet element = this.parent;\n\n\t// <p><b></b></p> needs filler -> <p><b><br></b></p>\n\twhile ( element && element.is( 'attributeElement' ) ) {\n\t\tif ( nonUiChildrenCount( element ) > 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\telement = element.parent;\n\t}\n\n\tif ( !element || nonUiChildrenCount( element ) > 1 ) {\n\t\treturn null;\n\t}\n\n\t// Render block filler at the end of element (after all ui elements).\n\treturn this.childCount;\n}\n\n// Returns total count of children that are not {@link module:engine/view/uielement~UIElement UIElements}.\n//\n// @param {module:engine/view/element~Element} element\n// @returns {Number}\nfunction nonUiChildrenCount( element ) {\n\treturn Array.from( element.getChildren() ).filter( element => !element.is( 'uiElement' ) ).length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/emptyelement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Node from './node';\n\n/**\n * Empty element class. It is used to represent elements that cannot contain any child nodes (for example `<img>` elements).\n *\n * To create a new empty element use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createEmptyElement `downcastWriter#createEmptyElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class EmptyElement extends Element {\n\t/**\n\t * Creates new instance of EmptyElement.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-emptyelement-cannot-add` when third parameter is passed,\n\t * to inform that usage of EmptyElement is incorrect (adding child nodes to EmptyElement is forbidden).\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createEmptyElement\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attributes] Collection of attributes.\n\t */\n\tconstructor( name, attributes, children ) {\n\t\tsuper( name, attributes, children );\n\n\t\t/**\n\t\t * Returns `null` because filler is not needed for EmptyElements.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {null} Always returns null.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\temptyElement.is( 'emptyElement' ); // -> true\n\t *\t\temptyElement.is( 'element' ); // -> true\n\t *\t\temptyElement.is( 'node' ); // -> true\n\t *\t\temptyElement.is( 'view:emptyElement' ); // -> true\n\t *\t\temptyElement.is( 'view:element' ); // -> true\n\t *\t\temptyElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\temptyElement.is( 'model:element' ); // -> false\n\t *\t\temptyElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an empty element, you can also check its\n\t * {@link module:engine/view/emptyelement~EmptyElement#name name}:\n\t *\n\t *\t\temptyElement.is( 'img' ); // -> true if this is a img element\n\t *\t\temptyElement.is( 'emptyElement', 'img' ); // -> same as above\n\t *\t\ttext.is( 'img' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'emptyElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'emptyElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Overrides {@link module:engine/view/element~Element#_insertChild} method.\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-emptyelement-cannot-add` to prevent\n\t * adding any child nodes to EmptyElement.\n\t *\n\t * @protected\n\t */\n\t_insertChild( index, nodes ) {\n\t\tif ( nodes && ( nodes instanceof Node || Array.from( nodes ).length > 0 ) ) {\n\t\t\t/**\n\t\t\t * Cannot add children to {@link module:engine/view/emptyelement~EmptyElement}.\n\t\t\t *\n\t\t\t * @error view-emptyelement-cannot-add\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-emptyelement-cannot-add: Cannot add child nodes to EmptyElement instance.',\n\t\t\t\t[ this, nodes ]\n\t\t\t);\n\t\t}\n\t}\n}\n\n// Returns `null` because block filler is not needed for EmptyElements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals navigator:false */\n\n/**\n * @module utils/env\n */\n\nconst userAgent = navigator.userAgent.toLowerCase();\n\n/**\n * A namespace containing environment and browser information.\n *\n * @namespace\n */\nconst env = {\n\t/**\n\t * Indicates that the application is running on Macintosh.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisMac: isMac( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Microsoft Edge.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisEdge: isEdge( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Firefox (Gecko).\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisGecko: isGecko( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Safari.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisSafari: isSafari( userAgent ),\n\n\t/**\n\t * Indicates that the application is running on Android mobile device.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisAndroid: isAndroid( userAgent ),\n\n\t/**\n\t * Environment features information.\n\t *\n\t * @memberOf module:utils/env~env\n\t * @namespace\n\t */\n\tfeatures: {\n\t\t/**\n\t\t * Indicates that the environment supports ES2018 Unicode property escapes — like `\\p{P}` or `\\p{L}`.\n\t\t * More information about unicode properties might be found\n\t\t * [in Unicode Standard Annex #44](https://www.unicode.org/reports/tr44/#GC_Values_Table).\n\t\t *\n\t\t * @type {Boolean}\n\t\t */\n\t\tisRegExpUnicodePropertySupported: isRegExpUnicodePropertySupported()\n\t}\n};\n\nexport default env;\n\n/**\n * Checks if User Agent represented by the string is running on Macintosh.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is running on Macintosh or not.\n */\nexport function isMac( userAgent ) {\n\treturn userAgent.indexOf( 'macintosh' ) > -1;\n}\n\n/**\n * Checks if User Agent represented by the string is Microsoft Edge.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Edge or not.\n */\nexport function isEdge( userAgent ) {\n\treturn !!userAgent.match( /edge\\/(\\d+.?\\d*)/ );\n}\n\n/**\n * Checks if User Agent represented by the string is Firefox (Gecko).\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Firefox or not.\n */\nexport function isGecko( userAgent ) {\n\treturn !!userAgent.match( /gecko\\/\\d+/ );\n}\n\n/**\n * Checks if User Agent represented by the string is Safari.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Safari or not.\n */\nexport function isSafari( userAgent ) {\n\treturn userAgent.indexOf( ' applewebkit/' ) > -1 && userAgent.indexOf( 'chrome' ) === -1;\n}\n\n/**\n * Checks if User Agent represented by the string is Android mobile device.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Safari or not.\n */\nexport function isAndroid( userAgent ) {\n\treturn userAgent.indexOf( 'android' ) > -1;\n}\n\n/**\n * Checks if the current environment supports ES2018 Unicode properties like `\\p{P}` or `\\p{L}`.\n * More information about unicode properties might be found\n * [in Unicode Standard Annex #44](https://www.unicode.org/reports/tr44/#GC_Values_Table).\n *\n * @returns {Boolean}\n */\nexport function isRegExpUnicodePropertySupported() {\n\tlet isSupported = false;\n\n\t// Feature detection for Unicode properties. Added in ES2018. Currently Firefox and Edge do not support it.\n\t// See https://github.com/ckeditor/ckeditor5-mention/issues/44#issuecomment-487002174.\n\n\ttry {\n\t\t// Usage of regular expression literal cause error during build (ckeditor/ckeditor5-dev#534).\n\t\tisSupported = 'ć'.search( new RegExp( '[\\\\p{L}]', 'u' ) ) === 0;\n\t} catch ( error ) {\n\t\t// Firefox throws a SyntaxError when the group is unsupported.\n\t}\n\n\treturn isSupported;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Set of utils related to keyboard support.\n *\n * @module utils/keyboard\n */\n\nimport CKEditorError from './ckeditorerror';\nimport env from './env';\n\nconst macGlyphsToModifiers = {\n\t'⌘': 'ctrl',\n\t'⇧': 'shift',\n\t'⌥': 'alt'\n};\n\nconst modifiersToMacGlyphs = {\n\t'ctrl': '⌘',\n\t'shift': '⇧',\n\t'alt': '⌥'\n};\n\n/**\n * Object with `keyName => keyCode` pairs for a set of known keys.\n *\n * Contains:\n *\n * * `a-z`,\n * * `0-9`,\n * * `f1-f12`,\n * * `arrow(left|up|right|bottom)`,\n * * `backspace`, `delete`, `enter`, `esc`, `tab`,\n * * `ctrl`, `cmd`, `shift`, `alt`.\n */\nexport const keyCodes = generateKnownKeyCodes();\n\n/**\n * Converts a key name or a {@link module:utils/keyboard~KeystrokeInfo keystroke info} into a key code.\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * @param {String|module:utils/keyboard~KeystrokeInfo} Key name (see {@link module:utils/keyboard~keyCodes})\n * or a keystroke data object.\n * @returns {Number} Key or keystroke code.\n */\nexport function getCode( key ) {\n\tlet keyCode;\n\n\tif ( typeof key == 'string' ) {\n\t\tkeyCode = keyCodes[ key.toLowerCase() ];\n\n\t\tif ( !keyCode ) {\n\t\t\t/**\n\t\t\t * Unknown key name. Only key names contained by the {@link module:utils/keyboard~keyCodes} can be used.\n\t\t\t *\n\t\t\t * @errror keyboard-unknown-key\n\t\t\t * @param {String} key\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'keyboard-unknown-key: Unknown key name.',\n\t\t\t\tnull, { key }\n\t\t\t);\n\t\t}\n\t} else {\n\t\tkeyCode = key.keyCode +\n\t\t\t( key.altKey ? keyCodes.alt : 0 ) +\n\t\t\t( key.ctrlKey ? keyCodes.ctrl : 0 ) +\n\t\t\t( key.shiftKey ? keyCodes.shift : 0 );\n\t}\n\n\treturn keyCode;\n}\n\n/**\n * Parses keystroke and returns a keystroke code that will match the code returned by\n * link {@link module:utils/keyboard.getCode} for a corresponding {@link module:utils/keyboard~KeystrokeInfo keystroke info}.\n *\n * The keystroke can be passed in two formats:\n *\n * * as a single string – e.g. `ctrl + A`,\n * * as an array of {@link module:utils/keyboard~keyCodes known key names} and key codes – e.g.:\n * * `[ 'ctrl', 32 ]` (ctrl + space),\n * * `[ 'ctrl', 'a' ]` (ctrl + A).\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * Note: Only keystrokes with a single non-modifier key are supported (e.g. `ctrl+A` is OK, but `ctrl+A+B` is not).\n *\n * @param {String|Array.<Number|String>} keystroke Keystroke definition.\n * @returns {Number} Keystroke code.\n */\nexport function parseKeystroke( keystroke ) {\n\tif ( typeof keystroke == 'string' ) {\n\t\tkeystroke = splitKeystrokeText( keystroke );\n\t}\n\n\treturn keystroke\n\t\t.map( key => ( typeof key == 'string' ) ? getCode( key ) : key )\n\t\t.reduce( ( key, sum ) => sum + key, 0 );\n}\n\n/**\n * It translates any keystroke string text like `\"CTRL+A\"` to an\n * environment–specific keystroke, i.e. `\"⌘A\"` on Mac OSX.\n *\n * @param {String} keystroke Keystroke text.\n * @returns {String} Keystroke text specific for the environment.\n */\nexport function getEnvKeystrokeText( keystroke ) {\n\tif ( !env.isMac ) {\n\t\treturn keystroke;\n\t}\n\n\treturn splitKeystrokeText( keystroke )\n\t\t// Replace modifiers (e.g. \"ctrl\") with Mac glyphs (e.g. \"⌘\") first.\n\t\t.map( key => modifiersToMacGlyphs[ key.toLowerCase() ] || key )\n\n\t\t// Decide whether to put \"+\" between keys in the keystroke or not.\n\t\t.reduce( ( value, key ) => {\n\t\t\tif ( value.slice( -1 ) in macGlyphsToModifiers ) {\n\t\t\t\treturn value + key;\n\t\t\t} else {\n\t\t\t\treturn value + '+' + key;\n\t\t\t}\n\t\t} );\n}\n\nfunction generateKnownKeyCodes() {\n\tconst keyCodes = {\n\t\tarrowleft: 37,\n\t\tarrowup: 38,\n\t\tarrowright: 39,\n\t\tarrowdown: 40,\n\t\tbackspace: 8,\n\t\tdelete: 46,\n\t\tenter: 13,\n\t\tspace: 32,\n\t\tesc: 27,\n\t\ttab: 9,\n\n\t\t// The idea about these numbers is that they do not collide with any real key codes, so we can use them\n\t\t// like bit masks.\n\t\tctrl: 0x110000,\n\t\t// Has the same code as ctrl, because their behaviour should be unified across the editor.\n\t\t// See http://ckeditor.github.io/editor-recommendations/general-policies#ctrl-vs-cmd\n\t\tcmd: 0x110000,\n\t\tshift: 0x220000,\n\t\talt: 0x440000\n\t};\n\n\t// a-z\n\tfor ( let code = 65; code <= 90; code++ ) {\n\t\tconst letter = String.fromCharCode( code );\n\n\t\tkeyCodes[ letter.toLowerCase() ] = code;\n\t}\n\n\t// 0-9\n\tfor ( let code = 48; code <= 57; code++ ) {\n\t\tkeyCodes[ code - 48 ] = code;\n\t}\n\n\t// F1-F12\n\tfor ( let code = 112; code <= 123; code++ ) {\n\t\tkeyCodes[ 'f' + ( code - 111 ) ] = code;\n\t}\n\n\treturn keyCodes;\n}\n\nfunction splitKeystrokeText( keystroke ) {\n\treturn keystroke.split( /\\s*\\+\\s*/ );\n}\n\n/**\n * Information about a keystroke.\n *\n * @interface module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * The [key code](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode).\n *\n * @member {Number} module:utils/keyboard~KeystrokeInfo#keyCode\n */\n\n/**\n * Whether the <kbd>Alt</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#altKey\n */\n\n/**\n * Whether the <kbd>Ctrl</kbd> or <kbd>Cmd</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#ctrlKey\n */\n\n/**\n * Whether the <kbd>Shift</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#shiftKey\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/uielement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Node from './node';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * UI element class. It should be used to represent editing UI which needs to be injected into the editing view\n * If possible, you should keep your UI outside the editing view. However, if that is not possible,\n * UI elements can be used.\n *\n * How a UI element is rendered is in your control (you pass a callback to\n * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`}).\n * The editor will ignore your UI element – the selection cannot be placed in it, it is skipped (invisible) when\n * the user modifies the selection by using arrow keys and the editor does not listen to any mutations which\n * happen inside your UI elements.\n *\n * The limitation is that you cannot convert a model element to a UI element. UI elements need to be\n * created for {@link module:engine/model/markercollection~Marker markers} or as additinal elements\n * inside normal {@link module:engine/view/containerelement~ContainerElement container elements}.\n *\n * To create a new UI element use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class UIElement extends Element {\n\t/**\n\t * Creates new instance of UIElement.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-uielement-cannot-add` when third parameter is passed,\n\t * to inform that usage of UIElement is incorrect (adding child nodes to UIElement is forbidden).\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createUIElement\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attributes] Collection of attributes.\n\t */\n\tconstructor( name, attributes, children ) {\n\t\tsuper( name, attributes, children );\n\n\t\t/**\n\t\t * Returns `null` because filler is not needed for UIElements.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {null} Always returns null.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tuiElement.is( 'uiElement' ); // -> true\n\t *\t\tuiElement.is( 'element' ); // -> true\n\t *\t\tuiElement.is( 'node' ); // -> true\n\t *\t\tuiElement.is( 'view:uiElement' ); // -> true\n\t *\t\tuiElement.is( 'view:element' ); // -> true\n\t *\t\tuiElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tuiElement.is( 'model:element' ); // -> false\n\t *\t\tuiElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an ui element, you can also check its\n\t * {@link module:engine/view/uielement~UIElement#name name}:\n\t *\n\t *\t\tuiElement.is( 'span' ); // -> true if this is a span ui element\n\t *\t\tuiElement.is( 'uiElement', 'span' ); // -> same as above\n\t *\t\ttext.is( 'span' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'uiElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'uiElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Overrides {@link module:engine/view/element~Element#_insertChild} method.\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-uielement-cannot-add` to prevent adding any child nodes\n\t * to UIElement.\n\t *\n\t * @protected\n\t */\n\t_insertChild( index, nodes ) {\n\t\tif ( nodes && ( nodes instanceof Node || Array.from( nodes ).length > 0 ) ) {\n\t\t\t/**\n\t\t\t * Cannot add children to {@link module:engine/view/uielement~UIElement}.\n\t\t\t *\n\t\t\t * @error view-uielement-cannot-add\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-uielement-cannot-add: Cannot add child nodes to UIElement instance.', this );\n\t\t}\n\t}\n\n\t/**\n\t * Renders this {@link module:engine/view/uielement~UIElement} to DOM. This method is called by\n\t * {@link module:engine/view/domconverter~DomConverter}.\n\t * Do not use inheritance to create custom rendering method, replace `render()` method instead:\n\t *\n\t *\t\tconst myUIElement = downcastWriter.createUIElement( 'span' );\n\t *\t\tmyUIElement.render = function( domDocument ) {\n\t *\t\t\tconst domElement = this.toDomElement( domDocument );\n\t *\t\t\tdomElement.innerHTML = '<b>this is ui element</b>';\n\t *\n\t *\t\t\treturn domElement;\n\t *\t\t};\n\t *\n\t * @param {Document} domDocument\n\t * @returns {HTMLElement}\n\t */\n\trender( domDocument ) {\n\t\treturn this.toDomElement( domDocument );\n\t}\n\n\t/**\n\t * Creates DOM element based on this view UIElement.\n\t * Note that each time this method is called new DOM element is created.\n\t *\n\t * @param {Document} domDocument\n\t * @returns {HTMLElement}\n\t */\n\ttoDomElement( domDocument ) {\n\t\tconst domElement = domDocument.createElement( this.name );\n\n\t\tfor ( const key of this.getAttributeKeys() ) {\n\t\t\tdomElement.setAttribute( key, this.getAttribute( key ) );\n\t\t}\n\n\t\treturn domElement;\n\t}\n}\n\n/**\n * This function injects UI element handling to the given {@link module:engine/view/document~Document document}.\n *\n * A callback is added to {@link module:engine/view/document~Document#event:keydown document keydown event}.\n * The callback handles the situation when right arrow key is pressed and selection is collapsed before a UI element.\n * Without this handler, it would be impossible to \"jump over\" UI element using right arrow key.\n *\n * @param {module:engine/view/view~View} view View controller to which the quirks handling will be injected.\n */\nexport function injectUiElementHandling( view ) {\n\tview.document.on( 'keydown', ( evt, data ) => jumpOverUiElement( evt, data, view.domConverter ) );\n}\n\n// Returns `null` because block filler is not needed for UIElements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n\n// Selection cannot be placed in a `UIElement`. Whenever it is placed there, it is moved before it. This\n// causes a situation when it is impossible to jump over `UIElement` using right arrow key, because the selection\n// ends up in ui element (in DOM) and is moved back to the left. This handler fixes this situation.\nfunction jumpOverUiElement( evt, data, domConverter ) {\n\tif ( data.keyCode == keyCodes.arrowright ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\t\tconst domSelectionCollapsed = domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed;\n\n\t\t// Jump over UI element if selection is collapsed or shift key is pressed. These are the cases when selection would extend.\n\t\tif ( domSelectionCollapsed || data.shiftKey ) {\n\t\t\tconst domParent = domSelection.focusNode;\n\t\t\tconst domOffset = domSelection.focusOffset;\n\n\t\t\tconst viewPosition = domConverter.domPositionToView( domParent, domOffset );\n\n\t\t\t// In case if dom element is not converted to view or is not mapped or something. Happens for example in some tests.\n\t\t\tif ( viewPosition === null ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip all following ui elements.\n\t\t\tlet jumpedOverAnyUiElement = false;\n\n\t\t\tconst nextViewPosition = viewPosition.getLastMatchingPosition( value => {\n\t\t\t\tif ( value.item.is( 'uiElement' ) ) {\n\t\t\t\t\t// Remember that there was at least one ui element.\n\t\t\t\t\tjumpedOverAnyUiElement = true;\n\t\t\t\t}\n\n\t\t\t\t// Jump over ui elements, jump over empty attribute elements, move up from inside of attribute element.\n\t\t\t\tif ( value.item.is( 'uiElement' ) || value.item.is( 'attributeElement' ) ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\t// Don't jump over text or don't get out of container element.\n\t\t\t\treturn false;\n\t\t\t} );\n\n\t\t\t// If anything has been skipped, fix position.\n\t\t\t// This `if` could be possibly omitted but maybe it is better not to mess with DOM selection if not needed.\n\t\t\tif ( jumpedOverAnyUiElement ) {\n\t\t\t\tconst newDomPosition = domConverter.viewPositionToDom( nextViewPosition );\n\n\t\t\t\tif ( domSelectionCollapsed ) {\n\t\t\t\t\t// Selection was collapsed, so collapse it at further position.\n\t\t\t\t\tdomSelection.collapse( newDomPosition.parent, newDomPosition.offset );\n\t\t\t\t} else {\n\t\t\t\t\t// Selection was not collapse, so extend it instead of collapsing.\n\t\t\t\t\tdomSelection.extend( newDomPosition.parent, newDomPosition.offset );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/documentfragment\n */\n\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\n/**\n * Document fragment.\n *\n * To create a new document fragment instance use the\n * {@link module:engine/view/upcastwriter~UpcastWriter#createDocumentFragment `UpcastWriter#createDocumentFragment()`}\n * method.\n */\nexport default class DocumentFragment {\n\t/**\n\t * Creates new DocumentFragment instance.\n\t *\n\t * @protected\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into the created document fragment.\n\t */\n\tconstructor( children ) {\n\t\t/**\n\t\t * Array of child nodes.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/element~Element>} module:engine/view/documentfragment~DocumentFragment#_children\n\t\t */\n\t\tthis._children = [];\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over nodes added to this document fragment.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Number of child nodes in this document fragment.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this document fragment, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Artificial root of `DocumentFragment`. Returns itself. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Artificial parent of `DocumentFragment`. Returns `null`. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {null}\n\t */\n\tget parent() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocFrag.is( 'documentFragment' ); // -> true\n\t *\t\tdocFrag.is( 'view:documentFragment' ); // -> true\n\t *\n\t *\t\tdocFrag.is( 'model:documentFragment' ); // -> false\n\t *\t\tdocFrag.is( 'element' ); // -> false\n\t *\t\tdocFrag.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'documentFragment' || type == 'view:documentFragment';\n\t}\n\n\t/**\n\t * {@link module:engine/view/documentfragment~DocumentFragment#_insertChild Insert} a child node or a list of child nodes at the end\n\t * and sets the parent of these nodes to this fragment.\n\t *\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @returns {Number} Number of appended nodes.\n\t */\n\t_appendChild( items ) {\n\t\treturn this._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Gets child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/view/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children[ index ];\n\t}\n\n\t/**\n\t * Gets index of the given child node. Returns `-1` if child node is not found.\n\t *\n\t * @param {module:engine/view/node~Node} node Child node.\n\t * @returns {Number} Index of the child node.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.indexOf( node );\n\t}\n\n\t/**\n\t * Gets child nodes iterator.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>} Child nodes iterator.\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this fragment.\n\t *\n\t * @param {Number} index Position where nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\t_insertChild( index, items ) {\n\t\tthis._fireChange( 'children', this );\n\t\tlet count = 0;\n\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\n\t\t\tthis._children.splice( index, 0, node );\n\t\t\tindex++;\n\t\t\tcount++;\n\t\t}\n\n\t\treturn count;\n\t}\n\n\t/**\n\t * Removes number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @param {Number} index Number of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/view/node~Node>} The array of removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tthis._fireChange( 'children', this );\n\n\t\tfor ( let i = index; i < index + howMany; i++ ) {\n\t\t\tthis._children[ i ].parent = null;\n\t\t}\n\n\t\treturn this._children.splice( index, howMany );\n\t}\n\n\t/**\n\t * Fires `change` event with given type of the change.\n\t *\n\t * @private\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Changed node.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_fireChange( type, node ) {\n\t\tthis.fire( 'change:' + type, node );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // printTree() {\n\t// @if CK_DEBUG_ENGINE //\tlet string = 'ViewDocumentFragment: [';\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + '\\t'.repeat( 1 ) + child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + child.printTree( 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\n]';\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( DocumentFragment, EmitterMixin );\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/view/item~Item|Iterable.<String|module:engine/view/item~Item>}\n// @returns {Iterable.<module:engine/view/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/view/downcastwriter\n */\n\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\nimport ContainerElement from './containerelement';\nimport AttributeElement from './attributeelement';\nimport EmptyElement from './emptyelement';\nimport UIElement from './uielement';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport DocumentFragment from './documentfragment';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport Text from './text';\nimport EditableElement from './editableelement';\nimport { isPlainObject } from 'lodash-es';\n\n/**\n * View downcast writer.\n *\n * It provides a set of methods used to manipulate view nodes.\n *\n * Do not create an instance of this writer manually. To modify a view structure, use\n * the {@link module:engine/view/view~View#change `View#change()`} block.\n *\n * The `DowncastWriter` is designed to work with semantic views which are the views that were/are being downcasted from the model.\n * To work with ordinary views (e.g. parsed from a pasted content) use the\n * {@link module:engine/view/upcastwriter~UpcastWriter upcast writer}.\n *\n * Read more about changing the view in the {@glink framework/guides/architecture/editing-engine#changing-the-view Changing the view}\n * section of the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide.\n */\nexport default class DowncastWriter {\n\tconstructor( document ) {\n\t\t/**\n\t\t * @readonly\n\t\t * @type {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = document;\n\n\t\t/**\n\t\t * Holds references to the attribute groups that share the same {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t\t * The keys are `id`s, the values are `Set`s holding {@link module:engine/view/attributeelement~AttributeElement}s.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<String,Set>}\n\t\t */\n\t\tthis._cloneGroups = new Map();\n\t}\n\n\t/**\n\t * Sets {@link module:engine/view/documentselection~DocumentSelection selection's} ranges and direction to the\n\t * specified location based on the given {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t * Usage:\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets backward selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\twriter.setSelection( otherSelection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\twriter.setSelection( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'p' );\n\t *\t\twriter.setSelection( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t * \t\twriter.setSelection( paragraph, 'in' );\n\t *\n\t * Creates a range on the {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'on' );\n\t *\n\t * \t\t// Removes all ranges.\n\t *\t\twriter.setSelection( null );\n\t *\n\t * `DowncastWriter#setSelection()` allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\twriter.setSelection( range, { backward: true } );\n\t *\n\t *\t\t// Sets selection as fake.\n\t *\t\t// Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * \t\t// This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * \t\t// represented in other way, for example by applying proper CSS class.\n\t *\t\twriter.setSelection( range, { fake: true } );\n\t *\n\t * \t\t// Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * \t\t// (and be properly handled by screen readers).\n\t *\t\twriter.setSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tsetSelection( selectable, placeOrOffset, options ) {\n\t\tthis.document.selection._setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/view/documentselection~DocumentSelection#focus selection's focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tsetSelectionFocus( itemOrPosition, offset ) {\n\t\tthis.document.selection._setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/text~Text text node}.\n\t *\n\t *\t\twriter.createText( 'foo' );\n\t *\n\t * @param {String} data The text's data.\n\t * @returns {module:engine/view/text~Text} The created text node.\n\t */\n\tcreateText( data ) {\n\t\treturn new Text( data );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/attributeelement~AttributeElement}.\n\t *\n\t *\t\twriter.createAttributeElement( 'strong' );\n\t *\t\twriter.createAttributeElement( 'a', { href: 'foo.bar' } );\n\t *\n\t *\t\t// Make `<a>` element contain other attributes element so the `<a>` element is not broken.\n\t *\t\twriter.createAttributeElement( 'a', { href: 'foo.bar' }, { priority: 5 } );\n\t *\n\t *\t\t// Set `id` of a marker element so it is not joined or merged with \"normal\" elements.\n\t *\t\twriter.createAttributeElement( 'span', { class: 'my-marker' }, { id: 'marker:my' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Element's attributes.\n\t * @param {Object} [options] Element's options.\n\t * @param {Number} [options.priority] Element's {@link module:engine/view/attributeelement~AttributeElement#priority priority}.\n\t * @param {Number|String} [options.id] Element's {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t * @returns {module:engine/view/attributeelement~AttributeElement} Created element.\n\t */\n\tcreateAttributeElement( name, attributes, options = {} ) {\n\t\tconst attributeElement = new AttributeElement( name, attributes );\n\n\t\tif ( options.priority ) {\n\t\t\tattributeElement._priority = options.priority;\n\t\t}\n\n\t\tif ( options.id ) {\n\t\t\tattributeElement._id = options.id;\n\t\t}\n\n\t\treturn attributeElement;\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/containerelement~ContainerElement}.\n\t *\n\t *\t\twriter.createContainerElement( 'p' );\n\t *\n\t *\t\t// Create element with custom attributes.\n\t *\t\twriter.createContainerElement( 'div', { id: 'foo-bar', 'data-baz': '123' } );\n\t *\n\t *\t\t// Create element with custom styles.\n\t *\t\twriter.createContainerElement( 'p', { style: 'font-weight: bold; padding-bottom: 10px' } );\n\t *\n\t *\t\t// Create element with custom classes.\n\t *\t\twriter.createContainerElement( 'p', { class: 'foo bar baz' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/containerelement~ContainerElement} Created element.\n\t */\n\tcreateContainerElement( name, attributes ) {\n\t\treturn new ContainerElement( name, attributes );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t *\t\twriter.createEditableElement( 'div' );\n\t *\t\twriter.createEditableElement( 'div', { id: 'foo-1234' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/editableelement~EditableElement} Created element.\n\t */\n\tcreateEditableElement( name, attributes ) {\n\t\tconst editableElement = new EditableElement( name, attributes );\n\t\teditableElement._document = this.document;\n\n\t\treturn editableElement;\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/emptyelement~EmptyElement}.\n\t *\n\t *\t\twriter.createEmptyElement( 'img' );\n\t *\t\twriter.createEmptyElement( 'img', { id: 'foo-1234' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/emptyelement~EmptyElement} Created element.\n\t */\n\tcreateEmptyElement( name, attributes ) {\n\t\treturn new EmptyElement( name, attributes );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/uielement~UIElement}.\n\t *\n\t *\t\twriter.createUIElement( 'span' );\n\t *\t\twriter.createUIElement( 'span', { id: 'foo-1234' } );\n\t *\n\t * Custom render function can be provided as third parameter:\n\t *\n\t *\t\twriter.createUIElement( 'span', null, function( domDocument ) {\n\t *\t\t\tconst domElement = this.toDomElement( domDocument );\n\t *\t\t\tdomElement.innerHTML = '<b>this is ui element</b>';\n\t *\n\t *\t\t\treturn domElement;\n\t *\t\t} );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {Function} [renderFunction] Custom render function.\n\t * @returns {module:engine/view/uielement~UIElement} Created element.\n\t */\n\tcreateUIElement( name, attributes, renderFunction ) {\n\t\tconst uiElement = new UIElement( name, attributes );\n\n\t\tif ( renderFunction ) {\n\t\t\tuiElement.render = renderFunction;\n\t\t}\n\n\t\treturn uiElement;\n\t}\n\n\t/**\n\t * Adds or overwrite element's attribute with a specified key and value.\n\t *\n\t *\t\twriter.setAttribute( 'href', 'http://ckeditor.com', linkElement );\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tsetAttribute( key, value, element ) {\n\t\telement._setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t *\t\twriter.removeAttribute( 'href', linkElement );\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveAttribute( key, element ) {\n\t\telement._removeAttribute( key );\n\t}\n\n\t/**\n\t * Adds specified class to the element.\n\t *\n\t *\t\twriter.addClass( 'foo', linkElement );\n\t *\t\twriter.addClass( [ 'foo', 'bar' ], linkElement );\n\t *\n\t * @param {Array.<String>|String} className\n\t * @param {module:engine/view/element~Element} element\n\t */\n\taddClass( className, element ) {\n\t\telement._addClass( className );\n\t}\n\n\t/**\n\t * Removes specified class from the element.\n\t *\n\t *\t\twriter.removeClass( 'foo', linkElement );\n\t *\t\twriter.removeClass( [ 'foo', 'bar' ], linkElement );\n\t *\n\t * @param {Array.<String>|String} className\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveClass( className, element ) {\n\t\telement._removeClass( className );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\twriter.setStyle( 'color', 'red', element );\n\t *\t\twriter.setStyle( {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t}, element );\n\t *\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @param {module:engine/view/element~Element} element Element to set styles on.\n\t */\n\tsetStyle( property, value, element ) {\n\t\tif ( isPlainObject( property ) && element === undefined ) {\n\t\t\telement = value;\n\t\t}\n\n\t\telement._setStyle( property, value );\n\t}\n\n\t/**\n\t * Removes specified style from the element.\n\t *\n\t *\t\twriter.removeStyle( 'color', element ); // Removes 'color' style.\n\t *\t\twriter.removeStyle( [ 'color', 'border-top' ], element ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @param {Array.<String>|String} property\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveStyle( property, element ) {\n\t\telement._removeStyle( property );\n\t}\n\n\t/**\n\t * Sets a custom property on element. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @param {String|Symbol} key\n\t * @param {*} value\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tsetCustomProperty( key, value, element ) {\n\t\telement._setCustomProperty( key, value );\n\t}\n\n\t/**\n\t * Removes a custom property stored under the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @param {module:engine/view/element~Element} element\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\tremoveCustomProperty( key, element ) {\n\t\treturn element._removeCustomProperty( key );\n\t}\n\n\t/**\n\t * Breaks attribute nodes at provided position or at boundaries of provided range. It breaks attribute elements inside\n\t * up to a container element.\n\t *\n\t * In following examples `<p>` is a container, `<b>` and `<u>` are attribute nodes:\n\t *\n\t *\t\t<p>foo<b><u>bar{}</u></b></p> -> <p>foo<b><u>bar</u></b>[]</p>\n\t *\t\t<p>foo<b><u>{}bar</u></b></p> -> <p>foo{}<b><u>bar</u></b></p>\n\t *\t\t<p>foo<b><u>b{}ar</u></b></p> -> <p>foo<b><u>b</u></b>[]<b><u>ar</u></b></p>\n\t *\t\t<p><b>fo{o</b><u>ba}r</u></p> -> <p><b>fo</b><b>o</b><u>ba</u><u>r</u></b></p>\n\t *\n\t * **Note:** {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes breakAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakContainer breakContainer} is that `breakAttributes` breaks all\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`,\n\t * up to the first encountered {@link module:engine/view/containerelement~ContainerElement container element}.\n\t * `breakContainer` assumes that given `position` is directly in container element and breaks that container element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container`\n\t * when {@link module:engine/view/range~Range#start start}\n\t * and {@link module:engine/view/range~Range#end end} positions of a passed range are not placed inside same parent container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element`\n\t * when trying to break attributes\n\t * inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element`\n\t * when trying to break attributes\n\t * inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#breakContainer\n\t * @param {module:engine/view/position~Position|module:engine/view/range~Range} positionOrRange Position where\n\t * to break attribute elements.\n\t * @returns {module:engine/view/position~Position|module:engine/view/range~Range} New position or range, after breaking the attribute\n\t * elements.\n\t */\n\tbreakAttributes( positionOrRange ) {\n\t\tif ( positionOrRange instanceof Position ) {\n\t\t\treturn this._breakAttributes( positionOrRange );\n\t\t} else {\n\t\t\treturn this._breakAttributesRange( positionOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Breaks {@link module:engine/view/containerelement~ContainerElement container view element} into two, at the given position. Position\n\t * has to be directly inside container element and cannot be in root. Does not break if position is at the beginning\n\t * or at the end of it's parent element.\n\t *\n\t *\t\t<p>foo^bar</p> -> <p>foo</p><p>bar</p>\n\t *\t\t<div><p>foo</p>^<p>bar</p></div> -> <div><p>foo</p></div><div><p>bar</p></div>\n\t *\t\t<p>^foobar</p> -> ^<p>foobar</p>\n\t *\t\t<p>foobar^</p> -> <p>foobar</p>^\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes breakAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakContainer breakContainer} is that `breakAttributes` breaks all\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`,\n\t * up to the first encountered {@link module:engine/view/containerelement~ContainerElement container element}.\n\t * `breakContainer` assumes that given `position` is directly in container element and breaks that container element.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#breakAttributes\n\t * @param {module:engine/view/position~Position} position Position where to break element.\n\t * @returns {module:engine/view/position~Position} Position between broken elements. If element has not been broken,\n\t * the returned position is placed either before it or after it.\n\t */\n\tbreakContainer( position ) {\n\t\tconst element = position.parent;\n\n\t\tif ( !( element.is( 'containerElement' ) ) ) {\n\t\t\t/**\n\t\t\t * Trying to break an element which is not a container element.\n\t\t\t *\n\t\t\t * @error view-writer-break-non-container-element\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-writer-break-non-container-element: Trying to break an element which is not a container element.',\n\t\t\t\tthis.document\n\t\t\t);\n\t\t}\n\n\t\tif ( !element.parent ) {\n\t\t\t/**\n\t\t\t * Trying to break root element.\n\t\t\t *\n\t\t\t * @error view-writer-break-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-break-root: Trying to break root element.', this.document );\n\t\t}\n\n\t\tif ( position.isAtStart ) {\n\t\t\treturn Position._createBefore( element );\n\t\t} else if ( !position.isAtEnd ) {\n\t\t\tconst newElement = element._clone( false );\n\n\t\t\tthis.insert( Position._createAfter( element ), newElement );\n\n\t\t\tconst sourceRange = new Range( position, Position._createAt( element, 'end' ) );\n\t\t\tconst targetPosition = new Position( newElement, 0 );\n\n\t\t\tthis.move( sourceRange, targetPosition );\n\t\t}\n\n\t\treturn Position._createAfter( element );\n\t}\n\n\t/**\n\t * Merges {@link module:engine/view/attributeelement~AttributeElement attribute elements}. It also merges text nodes if needed.\n\t * Only {@link module:engine/view/attributeelement~AttributeElement#isSimilar similar} attribute elements can be merged.\n\t *\n\t * In following examples `<p>` is a container and `<b>` is an attribute element:\n\t *\n\t *\t\t<p>foo[]bar</p> -> <p>foo{}bar</p>\n\t *\t\t<p><b>foo</b>[]<b>bar</b></p> -> <p><b>foo{}bar</b></p>\n\t *\t\t<p><b foo=\"bar\">a</b>[]<b foo=\"baz\">b</b></p> -> <p><b foo=\"bar\">a</b>[]<b foo=\"baz\">b</b></p>\n\t *\n\t * It will also take care about empty attributes when merging:\n\t *\n\t *\t\t<p><b>[]</b></p> -> <p>[]</p>\n\t *\t\t<p><b>foo</b><i>[]</i><b>bar</b></p> -> <p><b>foo{}bar</b></p>\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#mergeAttributes mergeAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n\t * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#mergeContainers\n\t * @param {module:engine/view/position~Position} position Merge position.\n\t * @returns {module:engine/view/position~Position} Position after merge.\n\t */\n\tmergeAttributes( position ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// When inside text node - nothing to merge.\n\t\tif ( positionParent.is( 'text' ) ) {\n\t\t\treturn position;\n\t\t}\n\n\t\t// When inside empty attribute - remove it.\n\t\tif ( positionParent.is( 'attributeElement' ) && positionParent.childCount === 0 ) {\n\t\t\tconst parent = positionParent.parent;\n\t\t\tconst offset = positionParent.index;\n\n\t\t\tpositionParent._remove();\n\t\t\tthis._removeFromClonedElementsGroup( positionParent );\n\n\t\t\treturn this.mergeAttributes( new Position( parent, offset ) );\n\t\t}\n\n\t\tconst nodeBefore = positionParent.getChild( positionOffset - 1 );\n\t\tconst nodeAfter = positionParent.getChild( positionOffset );\n\n\t\t// Position should be placed between two nodes.\n\t\tif ( !nodeBefore || !nodeAfter ) {\n\t\t\treturn position;\n\t\t}\n\n\t\t// When position is between two text nodes.\n\t\tif ( nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\t\t// When position is between two same attribute elements.\n\t\telse if ( nodeBefore.is( 'attributeElement' ) && nodeAfter.is( 'attributeElement' ) && nodeBefore.isSimilar( nodeAfter ) ) {\n\t\t\t// Move all children nodes from node placed after selection and remove that node.\n\t\t\tconst count = nodeBefore.childCount;\n\t\t\tnodeBefore._appendChild( nodeAfter.getChildren() );\n\n\t\t\tnodeAfter._remove();\n\t\t\tthis._removeFromClonedElementsGroup( nodeAfter );\n\n\t\t\t// New position is located inside the first node, before new nodes.\n\t\t\t// Call this method recursively to merge again if needed.\n\t\t\treturn this.mergeAttributes( new Position( nodeBefore, count ) );\n\t\t}\n\n\t\treturn position;\n\t}\n\n\t/**\n\t * Merges two {@link module:engine/view/containerelement~ContainerElement container elements} that are before and after given position.\n\t * Precisely, the element after the position is removed and it's contents are moved to element before the position.\n\t *\n\t *\t\t<p>foo</p>^<p>bar</p> -> <p>foo^bar</p>\n\t *\t\t<div>foo</div>^<p>bar</p> -> <div>foo^bar</div>\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#mergeAttributes mergeAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n\t * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#mergeAttributes\n\t * @param {module:engine/view/position~Position} position Merge position.\n\t * @returns {module:engine/view/position~Position} Position after merge.\n\t */\n\tmergeContainers( position ) {\n\t\tconst prev = position.nodeBefore;\n\t\tconst next = position.nodeAfter;\n\n\t\tif ( !prev || !next || !prev.is( 'containerElement' ) || !next.is( 'containerElement' ) ) {\n\t\t\t/**\n\t\t\t * Element before and after given position cannot be merged.\n\t\t\t *\n\t\t\t * @error view-writer-merge-containers-invalid-position\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-merge-containers-invalid-position: ' +\n\t\t\t\t'Element before and after given position cannot be merged.', this.document );\n\t\t}\n\n\t\tconst lastChild = prev.getChild( prev.childCount - 1 );\n\t\tconst newPosition = lastChild instanceof Text ? Position._createAt( lastChild, 'end' ) : Position._createAt( prev, 'end' );\n\n\t\tthis.move( Range._createIn( next ), Position._createAt( prev, 'end' ) );\n\t\tthis.remove( Range._createOn( next ) );\n\n\t\treturn newPosition;\n\t}\n\n\t/**\n\t * Insert node or nodes at specified position. Takes care about breaking attributes before insertion\n\t * and merging them afterwards.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n\t * contains instances that are not {@link module:engine/view/text~Text Texts},\n\t * {@link module:engine/view/attributeelement~AttributeElement AttributeElements},\n\t * {@link module:engine/view/containerelement~ContainerElement ContainerElements},\n\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElements} or\n\t * {@link module:engine/view/uielement~UIElement UIElements}.\n\t *\n\t * @param {module:engine/view/position~Position} position Insertion position.\n\t * @param {module:engine/view/text~Text|module:engine/view/attributeelement~AttributeElement|\n\t * module:engine/view/containerelement~ContainerElement|module:engine/view/emptyelement~EmptyElement|\n\t * module:engine/view/uielement~UIElement|Iterable.<module:engine/view/text~Text|\n\t * module:engine/view/attributeelement~AttributeElement|module:engine/view/containerelement~ContainerElement|\n\t * module:engine/view/emptyelement~EmptyElement|module:engine/view/uielement~UIElement>} nodes Node or nodes to insert.\n\t * @returns {module:engine/view/range~Range} Range around inserted nodes.\n\t */\n\tinsert( position, nodes ) {\n\t\tnodes = isIterable( nodes ) ? [ ...nodes ] : [ nodes ];\n\n\t\t// Check if nodes to insert are instances of AttributeElements, ContainerElements, EmptyElements, UIElements or Text.\n\t\tvalidateNodesToInsert( nodes, this.document );\n\n\t\tconst container = getParentContainer( position );\n\n\t\tif ( !container ) {\n\t\t\t/**\n\t\t\t * Position's parent container cannot be found.\n\t\t\t *\n\t\t\t * @error view-writer-invalid-position-container\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-invalid-position-container', this.document );\n\t\t}\n\n\t\tconst insertionPosition = this._breakAttributes( position, true );\n\t\tconst length = container._insertChild( insertionPosition.offset, nodes );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tthis._addToClonedElementsGroup( node );\n\t\t}\n\n\t\tconst endPosition = insertionPosition.getShiftedBy( length );\n\t\tconst start = this.mergeAttributes( insertionPosition );\n\n\t\t// When no nodes were inserted - return collapsed range.\n\t\tif ( length === 0 ) {\n\t\t\treturn new Range( start, start );\n\t\t} else {\n\t\t\t// If start position was merged - move end position.\n\t\t\tif ( !start.isEqual( insertionPosition ) ) {\n\t\t\t\tendPosition.offset--;\n\t\t\t}\n\n\t\t\tconst end = this.mergeAttributes( endPosition );\n\n\t\t\treturn new Range( start, end );\n\t\t}\n\t}\n\n\t/**\n\t * Removes provided range from the container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range|module:engine/view/item~Item} rangeOrItem Range to remove from container\n\t * or an {@link module:engine/view/item~Item item} to remove. If range is provided, after removing, it will be updated\n\t * to a collapsed range showing the new position.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} Document fragment containing removed nodes.\n\t */\n\tremove( rangeOrItem ) {\n\t\tconst range = rangeOrItem instanceof Range ? rangeOrItem : Range._createOn( rangeOrItem );\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// If range is collapsed - nothing to remove.\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn new DocumentFragment();\n\t\t}\n\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\tconst count = breakEnd.offset - breakStart.offset;\n\n\t\t// Remove nodes in range.\n\t\tconst removed = parentContainer._removeChildren( breakStart.offset, count );\n\n\t\tfor ( const node of removed ) {\n\t\t\tthis._removeFromClonedElementsGroup( node );\n\t\t}\n\n\t\t// Merge after removing.\n\t\tconst mergePosition = this.mergeAttributes( breakStart );\n\t\trange.start = mergePosition;\n\t\trange.end = mergePosition.clone();\n\n\t\t// Return removed nodes.\n\t\treturn new DocumentFragment( removed );\n\t}\n\n\t/**\n\t * Removes matching elements from given range.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} range Range to clear.\n\t * @param {module:engine/view/element~Element} element Element to remove.\n\t */\n\tclear( range, element ) {\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Create walker on given range.\n\t\t// We walk backward because when we remove element during walk it modifies range end position.\n\t\tconst walker = range.getWalker( {\n\t\t\tdirection: 'backward',\n\t\t\tignoreElementEnd: true\n\t\t} );\n\n\t\t// Let's walk.\n\t\tfor ( const current of walker ) {\n\t\t\tconst item = current.item;\n\t\t\tlet rangeToRemove;\n\n\t\t\t// When current item matches to the given element.\n\t\t\tif ( item.is( 'element' ) && element.isSimilar( item ) ) {\n\t\t\t\t// Create range on this element.\n\t\t\t\trangeToRemove = Range._createOn( item );\n\t\t\t\t// When range starts inside Text or TextProxy element.\n\t\t\t} else if ( !current.nextPosition.isAfter( range.start ) && item.is( 'textProxy' ) ) {\n\t\t\t\t// We need to check if parent of this text matches to given element.\n\t\t\t\tconst parentElement = item.getAncestors().find( ancestor => {\n\t\t\t\t\treturn ancestor.is( 'element' ) && element.isSimilar( ancestor );\n\t\t\t\t} );\n\n\t\t\t\t// If it is then create range inside this element.\n\t\t\t\tif ( parentElement ) {\n\t\t\t\t\trangeToRemove = Range._createIn( parentElement );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we have found element to remove.\n\t\t\tif ( rangeToRemove ) {\n\t\t\t\t// We need to check if element range stick out of the given range and truncate if it is.\n\t\t\t\tif ( rangeToRemove.end.isAfter( range.end ) ) {\n\t\t\t\t\trangeToRemove.end = range.end;\n\t\t\t\t}\n\n\t\t\t\tif ( rangeToRemove.start.isBefore( range.start ) ) {\n\t\t\t\t\trangeToRemove.start = range.start;\n\t\t\t\t}\n\n\t\t\t\t// At the end we remove range with found element.\n\t\t\t\tthis.remove( rangeToRemove );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Moves nodes from provided range to target position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} sourceRange Range containing nodes to move.\n\t * @param {module:engine/view/position~Position} targetPosition Position to insert.\n\t * @returns {module:engine/view/range~Range} Range in target container. Inserted nodes are placed between\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions.\n\t */\n\tmove( sourceRange, targetPosition ) {\n\t\tlet nodes;\n\n\t\tif ( targetPosition.isAfter( sourceRange.end ) ) {\n\t\t\ttargetPosition = this._breakAttributes( targetPosition, true );\n\n\t\t\tconst parent = targetPosition.parent;\n\t\t\tconst countBefore = parent.childCount;\n\n\t\t\tsourceRange = this._breakAttributesRange( sourceRange, true );\n\n\t\t\tnodes = this.remove( sourceRange );\n\n\t\t\ttargetPosition.offset += ( parent.childCount - countBefore );\n\t\t} else {\n\t\t\tnodes = this.remove( sourceRange );\n\t\t}\n\n\t\treturn this.insert( targetPosition, nodes );\n\t}\n\n\t/**\n\t * Wraps elements within range with provided {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t * If a collapsed range is provided, it will be wrapped only if it is equal to view selection.\n\t *\n\t * If a collapsed range was passed and is same as selection, the selection\n\t * will be moved to the inside of the wrapped attribute element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-invalid-range-container`\n\t * when {@link module:engine/view/range~Range#start}\n\t * and {@link module:engine/view/range~Range#end} positions are not placed inside same parent container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-nonselection-collapsed-range` when passed range\n\t * is collapsed and different than view selection.\n\t *\n\t * @param {module:engine/view/range~Range} range Range to wrap.\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute Attribute element to use as wrapper.\n\t * @returns {module:engine/view/range~Range} range Range after wrapping, spanning over wrapping attribute element.\n\t*/\n\twrap( range, attribute ) {\n\t\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\t\tthrow new CKEditorError( 'view-writer-wrap-invalid-attribute', this.document );\n\t\t}\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\tif ( !range.isCollapsed ) {\n\t\t\t// Non-collapsed range. Wrap it with the attribute element.\n\t\t\treturn this._wrapRange( range, attribute );\n\t\t} else {\n\t\t\t// Collapsed range. Wrap position.\n\t\t\tlet position = range.start;\n\n\t\t\tif ( position.parent.is( 'element' ) && !_hasNonUiChildren( position.parent ) ) {\n\t\t\t\tposition = position.getLastMatchingPosition( value => value.item.is( 'uiElement' ) );\n\t\t\t}\n\n\t\t\tposition = this._wrapPosition( position, attribute );\n\t\t\tconst viewSelection = this.document.selection;\n\n\t\t\t// If wrapping position is equal to view selection, move view selection inside wrapping attribute element.\n\t\t\tif ( viewSelection.isCollapsed && viewSelection.getFirstPosition().isEqual( range.start ) ) {\n\t\t\t\tthis.setSelection( position );\n\t\t\t}\n\n\t\t\treturn new Range( position );\n\t\t}\n\t}\n\n\t/**\n\t * Unwraps nodes within provided range from attribute element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t */\n\tunwrap( range, attribute ) {\n\t\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\t\t/**\n\t\t\t * Attribute element need to be instance of attribute element.\n\t\t\t *\n\t\t\t * @error view-writer-unwrap-invalid-attribute\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-unwrap-invalid-attribute', this.document );\n\t\t}\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// If range is collapsed - nothing to unwrap.\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn range;\n\t\t}\n\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Unwrap children located between break points.\n\t\tconst newRange = this._unwrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Renames element by creating a copy of renamed element but with changed name and then moving contents of the\n\t * old element to the new one. Keep in mind that this will invalidate all {@link module:engine/view/position~Position positions} which\n\t * has renamed element as {@link module:engine/view/position~Position#parent a parent}.\n\t *\n\t * New element has to be created because `Element#tagName` property in DOM is readonly.\n\t *\n\t * Since this function creates a new element and removes the given one, the new element is returned to keep reference.\n\t *\n\t * @param {String} newName New name for element.\n\t * @param {module:engine/view/containerelement~ContainerElement} viewElement Element to be renamed.\n\t */\n\trename( newName, viewElement ) {\n\t\tconst newElement = new ContainerElement( newName, viewElement.getAttributes() );\n\n\t\tthis.insert( Position._createAfter( viewElement ), newElement );\n\t\tthis.move( Range._createIn( viewElement ), Position._createAt( newElement, 0 ) );\n\t\tthis.remove( Range._createOn( viewElement ) );\n\n\t\treturn newElement;\n\t}\n\n\t/**\n\t * Cleans up memory by removing obsolete cloned elements group from the writer.\n\t *\n\t * Should be used whenever all {@link module:engine/view/attributeelement~AttributeElement attribute elements}\n\t * with the same {@link module:engine/view/attributeelement~AttributeElement#id id} are going to be removed from the view and\n\t * the group will no longer be needed.\n\t *\n\t * Cloned elements group are not removed automatically in case if the group is still needed after all its elements\n\t * were removed from the view.\n\t *\n\t * Keep in mind that group names are equal to the `id` property of the attribute element.\n\t *\n\t * @param {String} groupName Name of the group to clear.\n\t */\n\tclearClonedElementsGroup( groupName ) {\n\t\tthis._cloneGroups.delete( groupName );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t Creates new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'p' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Wraps children with provided `wrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be wrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} wrapElement\n\t */\n\t_wrapChildren( parent, startOffset, endOffset, wrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst wrapPositions = [];\n\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\t\t\tconst isText = child.is( 'text' );\n\t\t\tconst isAttribute = child.is( 'attributeElement' );\n\t\t\tconst isEmpty = child.is( 'emptyElement' );\n\t\t\tconst isUI = child.is( 'uiElement' );\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `wrapElement` is `<span class=\"foo\">` element.)\n\t\t\t//\n\t\t\t// Check if `wrapElement` can be joined with the wrapped element. One of requirements is having same name.\n\t\t\t// If possible, join elements.\n\t\t\t//\n\t\t\t// <p><span class=\"bar\">abc</span></p> --> <p><span class=\"foo bar\">abc</span></p>\n\t\t\t//\n\t\t\tif ( isAttribute && this._wrapAttributeElement( wrapElement, child ) ) {\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// Wrap the child if it is not an attribute element or if it is an attribute element that should be inside\n\t\t\t// `wrapElement` (due to priority).\n\t\t\t//\n\t\t\t// <p>abc</p> --> <p><span class=\"foo\">abc</span></p>\n\t\t\t// <p><strong>abc</strong></p> --> <p><span class=\"foo\"><strong>abc</strong></span></p>\n\t\t\t//\n\t\t\telse if ( isText || isEmpty || isUI || ( isAttribute && shouldABeOutsideB( wrapElement, child ) ) ) {\n\t\t\t\t// Clone attribute.\n\t\t\t\tconst newAttribute = wrapElement._clone();\n\n\t\t\t\t// Wrap current node with new attribute.\n\t\t\t\tchild._remove();\n\t\t\t\tnewAttribute._appendChild( child );\n\n\t\t\t\tparent._insertChild( i, newAttribute );\n\t\t\t\tthis._addToClonedElementsGroup( newAttribute );\n\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// If other nested attribute is found and it wasn't wrapped (see above), continue wrapping inside it.\n\t\t\t//\n\t\t\t// <p><a href=\"foo.html\">abc</a></p> --> <p><a href=\"foo.html\"><span class=\"foo\">abc</span></a></p>\n\t\t\t//\n\t\t\telse if ( isAttribute ) {\n\t\t\t\tthis._wrapChildren( child, 0, child.childCount, wrapElement );\n\t\t\t}\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each wrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of wrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Unwraps children from provided `unwrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} unwrapElement\n\t */\n\t_unwrapChildren( parent, startOffset, endOffset, unwrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst unwrapPositions = [];\n\n\t\t// Iterate over each element between provided offsets inside parent.\n\t\t// We don't use tree walker or range iterator because we will be removing and merging potentially multiple nodes,\n\t\t// so it could get messy. It is safer to it manually in this case.\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\n\t\t\t// Skip all text nodes. There should be no container element's here either.\n\t\t\tif ( !child.is( 'attributeElement' ) ) {\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `unwrapElement` is `<span class=\"foo\">` element.)\n\t\t\t//\n\t\t\t// If the child is similar to the given attribute element, unwrap it - it will be completely removed.\n\t\t\t//\n\t\t\t// <p><span class=\"foo\">abc</span>xyz</p> --> <p>abcxyz</p>\n\t\t\t//\n\t\t\tif ( child.isSimilar( unwrapElement ) ) {\n\t\t\t\tconst unwrapped = child.getChildren();\n\t\t\t\tconst count = child.childCount;\n\n\t\t\t\t// Replace wrapper element with its children\n\t\t\t\tchild._remove();\n\t\t\t\tparent._insertChild( i, unwrapped );\n\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\n\t\t\t\t// Save start and end position of moved items.\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + count )\n\t\t\t\t);\n\n\t\t\t\t// Skip elements that were unwrapped. Assuming there won't be another element to unwrap in child elements.\n\t\t\t\ti += count;\n\t\t\t\tendOffset += count - 1;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If the child is not similar but is an attribute element, try partial unwrapping - remove the same attributes/styles/classes.\n\t\t\t// Partial unwrapping will happen only if the elements have the same name.\n\t\t\t//\n\t\t\t// <p><span class=\"foo bar\">abc</span>xyz</p> --> <p><span class=\"bar\">abc</span>xyz</p>\n\t\t\t// <p><i class=\"foo\">abc</i>xyz</p> --> <p><i class=\"foo\">abc</i>xyz</p>\n\t\t\t//\n\t\t\tif ( this._unwrapAttributeElement( unwrapElement, child ) ) {\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + 1 )\n\t\t\t\t);\n\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If other nested attribute is found, look through it's children for elements to unwrap.\n\t\t\t//\n\t\t\t// <p><i><span class=\"foo\">abc</span></i><p> --> <p><i>abc</i><p>\n\t\t\t//\n\t\t\tthis._unwrapChildren( child, 0, child.childCount, unwrapElement );\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each unwrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of unwrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset || position.offset == endOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Helper function for `view.writer.wrap`. Wraps range with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/range~Range} New range after wrapping, spanning over wrapping attribute element.\n\t */\n\t_wrapRange( range, attribute ) {\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Wrap all children with attribute.\n\t\tconst newRange = this._wrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Helper function for {@link #wrap}. Wraps position with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/position~Position} New position after wrapping.\n\t */\n\t_wrapPosition( position, attribute ) {\n\t\t// Return same position when trying to wrap with attribute similar to position parent.\n\t\tif ( attribute.isSimilar( position.parent ) ) {\n\t\t\treturn movePositionToTextNode( position.clone() );\n\t\t}\n\n\t\t// When position is inside text node - break it and place new position between two text nodes.\n\t\tif ( position.parent.is( 'text' ) ) {\n\t\t\tposition = breakTextNode( position );\n\t\t}\n\n\t\t// Create fake element that will represent position, and will not be merged with other attributes.\n\t\tconst fakePosition = this.createAttributeElement();\n\t\tfakePosition._priority = Number.POSITIVE_INFINITY;\n\t\tfakePosition.isSimilar = () => false;\n\n\t\t// Insert fake element in position location.\n\t\tposition.parent._insertChild( position.offset, fakePosition );\n\n\t\t// Range around inserted fake attribute element.\n\t\tconst wrapRange = new Range( position, position.getShiftedBy( 1 ) );\n\n\t\t// Wrap fake element with attribute (it will also merge if possible).\n\t\tthis.wrap( wrapRange, attribute );\n\n\t\t// Remove fake element and place new position there.\n\t\tconst newPosition = new Position( fakePosition.parent, fakePosition.index );\n\t\tfakePosition._remove();\n\n\t\t// If position is placed between text nodes - merge them and return position inside.\n\t\tconst nodeBefore = newPosition.nodeBefore;\n\t\tconst nodeAfter = newPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof Text && nodeAfter instanceof Text ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\n\t\t// If position is next to text node - move position inside.\n\t\treturn movePositionToTextNode( newPosition );\n\t}\n\n\t/**\n\t * \tWraps one {@link module:engine/view/attributeelement~AttributeElement AttributeElement} into another by\n\t * \tmerging them if possible. When merging is possible - all attributes, styles and classes are moved from wrapper\n\t * \telement to element being wrapped.\n\t *\n\t * \t@private\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} toWrap AttributeElement to wrap using wrapper element.\n\t * \t@returns {Boolean} Returns `true` if elements are merged.\n\t */\n\t_wrapAttributeElement( wrapper, toWrap ) {\n\t\tif ( !canBeJoined( wrapper, toWrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't merge if name or priority differs.\n\t\tif ( wrapper.name !== toWrap.name || wrapper.priority !== toWrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes can be merged.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are different we cannot wrap.\n\t\t\tif ( toWrap.hasAttribute( key ) && toWrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles can be merged.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( toWrap.hasStyle( key ) && toWrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Move all attributes/classes/styles from wrapper to wrapped AttributeElement.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// Move only these attributes that are not present - other are similar.\n\t\t\tif ( !toWrap.hasAttribute( key ) ) {\n\t\t\t\tthis.setAttribute( key, wrapper.getAttribute( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( !toWrap.hasStyle( key ) ) {\n\t\t\t\tthis.setStyle( key, wrapper.getStyle( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getClassNames() ) {\n\t\t\tif ( !toWrap.hasClass( key ) ) {\n\t\t\t\tthis.addClass( key, toWrap );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Unwraps {@link module:engine/view/attributeelement~AttributeElement AttributeElement} from another by removing\n\t * corresponding attributes, classes and styles. All attributes, classes and styles from wrapper should be present\n\t * inside element being unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * @param {module:engine/view/attributeelement~AttributeElement} toUnwrap AttributeElement to unwrap using wrapper element.\n\t * @returns {Boolean} Returns `true` if elements are unwrapped.\n\t **/\n\t_unwrapAttributeElement( wrapper, toUnwrap ) {\n\t\tif ( !canBeJoined( wrapper, toUnwrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't unwrap if name or priority differs.\n\t\tif ( wrapper.name !== toUnwrap.name || wrapper.priority !== toUnwrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper attributes.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasAttribute( key ) || toUnwrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper classes.\n\t\tif ( !toUnwrap.hasClass( ...wrapper.getClassNames() ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper styles.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\t// If some styles are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasStyle( key ) || toUnwrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Remove all wrapper's attributes from unwrapped element.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tthis.removeAttribute( key, toUnwrap );\n\t\t}\n\n\t\t// Remove all wrapper's classes from unwrapped element.\n\t\tthis.removeClass( Array.from( wrapper.getClassNames() ), toUnwrap );\n\n\t\t// Remove all wrapper's styles from unwrapped element.\n\t\tthis.removeStyle( Array.from( wrapper.getStyleNames() ), toUnwrap );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at the boundaries of given range.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range Range which `start` and `end` positions will be used to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/range~Range} New range with located at break positions.\n\t */\n\t_breakAttributesRange( range, forceSplitText = false ) {\n\t\tconst rangeStart = range.start;\n\t\tconst rangeEnd = range.end;\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Break at the collapsed position. Return new collapsed range.\n\t\tif ( range.isCollapsed ) {\n\t\t\tconst position = this._breakAttributes( range.start, forceSplitText );\n\n\t\t\treturn new Range( position, position );\n\t\t}\n\n\t\tconst breakEnd = this._breakAttributes( rangeEnd, forceSplitText );\n\t\tconst count = breakEnd.parent.childCount;\n\t\tconst breakStart = this._breakAttributes( rangeStart, forceSplitText );\n\n\t\t// Calculate new break end offset.\n\t\tbreakEnd.offset += breakEnd.parent.childCount - count;\n\n\t\treturn new Range( breakStart, breakEnd );\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at given position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position\n\t * is placed inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position\n\t * is placed inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position Position where to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/position~Position} New position after breaking the attributes.\n\t */\n\t_breakAttributes( position, forceSplitText = false ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// If position is placed inside EmptyElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'emptyElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside EmptyElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-empty-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-empty-element', this.document );\n\t\t}\n\n\t\t// If position is placed inside UIElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'uiElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside UIElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-ui-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-ui-element', this.document );\n\t\t}\n\n\t\t// There are no attributes to break and text nodes breaking is not forced.\n\t\tif ( !forceSplitText && positionParent.is( 'text' ) && isContainerOrFragment( positionParent.parent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Position's parent is container, so no attributes to break.\n\t\tif ( isContainerOrFragment( positionParent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Break text and start again in new position.\n\t\tif ( positionParent.is( 'text' ) ) {\n\t\t\treturn this._breakAttributes( breakTextNode( position ), forceSplitText );\n\t\t}\n\n\t\tconst length = positionParent.childCount;\n\n\t\t// <p>foo<b><u>bar{}</u></b></p>\n\t\t// <p>foo<b><u>bar</u>[]</b></p>\n\t\t// <p>foo<b><u>bar</u></b>[]</p>\n\t\tif ( positionOffset == length ) {\n\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index + 1 );\n\n\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t} else {\n\t\t\t// <p>foo<b><u>{}bar</u></b></p>\n\t\t\t// <p>foo<b>[]<u>bar</u></b></p>\n\t\t\t// <p>foo{}<b><u>bar</u></b></p>\n\t\t\tif ( positionOffset === 0 ) {\n\t\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t\t// <p>foo<b><u>b{}ar</u></b></p>\n\t\t\t// <p>foo<b><u>b[]ar</u></b></p>\n\t\t\t// <p>foo<b><u>b</u>[]<u>ar</u></b></p>\n\t\t\t// <p>foo<b><u>b</u></b>[]<b><u>ar</u></b></p>\n\t\t\telse {\n\t\t\t\tconst offsetAfter = positionParent.index + 1;\n\n\t\t\t\t// Break element.\n\t\t\t\tconst clonedNode = positionParent._clone();\n\n\t\t\t\t// Insert cloned node to position's parent node.\n\t\t\t\tpositionParent.parent._insertChild( offsetAfter, clonedNode );\n\t\t\t\tthis._addToClonedElementsGroup( clonedNode );\n\n\t\t\t\t// Get nodes to move.\n\t\t\t\tconst count = positionParent.childCount - positionOffset;\n\t\t\t\tconst nodesToMove = positionParent._removeChildren( positionOffset, count );\n\n\t\t\t\t// Move nodes to cloned node.\n\t\t\t\tclonedNode._appendChild( nodesToMove );\n\n\t\t\t\t// Create new position to work on.\n\t\t\t\tconst newPosition = new Position( positionParent.parent, offsetAfter );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Stores the information that an {@link module:engine/view/attributeelement~AttributeElement attribute element} was\n\t * added to the tree. Saves the reference to the group in the given element and updates the group, so other elements\n\t * from the group now keep a reference to the given attribute element.\n\t *\n\t * The clones group can be obtained using {@link module:engine/view/attributeelement~AttributeElement#getElementsWithSameId}.\n\t *\n\t * Does nothing if added element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to save.\n\t */\n\t_addToClonedElementsGroup( element ) {\n\t\t// Add only if the element is in document tree.\n\t\tif ( !element.root.is( 'rootElement' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Traverse the element's children recursively to find other attribute elements that also might got inserted.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._addToClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tlet group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\tgroup = new Set();\n\t\t\tthis._cloneGroups.set( id, group );\n\t\t}\n\n\t\tgroup.add( element );\n\t\telement._clonesGroup = group;\n\t}\n\n\t/**\n\t * Removes all the information about the given {@link module:engine/view/attributeelement~AttributeElement attribute element}\n\t * from its clones group.\n\t *\n\t * Keep in mind, that the element will still keep a reference to the group (but the group will not keep a reference to it).\n\t * This allows to reference the whole group even if the element was already removed from the tree.\n\t *\n\t * Does nothing if the element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to remove.\n\t */\n\t_removeFromClonedElementsGroup( element ) {\n\t\t// Traverse the element's children recursively to find other attribute elements that also got removed.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\treturn;\n\t\t}\n\n\t\tgroup.delete( element );\n\t\t// Not removing group from element on purpose!\n\t\t// If other parts of code have reference to this element, they will be able to get references to other elements from the group.\n\t}\n}\n\n// Helper function for `view.writer.wrap`. Checks if given element has any children that are not ui elements.\nfunction _hasNonUiChildren( parent ) {\n\treturn Array.from( parent.getChildren() ).some( child => !child.is( 'uiElement' ) );\n}\n\n/**\n * Attribute element need to be instance of attribute element.\n *\n * @error view-writer-wrap-invalid-attribute\n */\n\n// Returns first parent container of specified {@link module:engine/view/position~Position Position}.\n// Position's parent node is checked as first, then next parents are checked.\n// Note that {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n//\n// @param {module:engine/view/position~Position} position Position used as a start point to locate parent container.\n// @returns {module:engine/view/containerelement~ContainerElement|module:engine/view/documentfragment~DocumentFragment|undefined}\n// Parent container element or `undefined` if container is not found.\nfunction getParentContainer( position ) {\n\tlet parent = position.parent;\n\n\twhile ( !isContainerOrFragment( parent ) ) {\n\t\tif ( !parent ) {\n\t\t\treturn undefined;\n\t\t}\n\t\tparent = parent.parent;\n\t}\n\n\treturn parent;\n}\n\n// Checks if first {@link module:engine/view/attributeelement~AttributeElement AttributeElement} provided to the function\n// can be wrapped otuside second element. It is done by comparing elements'\n// {@link module:engine/view/attributeelement~AttributeElement#priority priorities}, if both have same priority\n// {@link module:engine/view/element~Element#getIdentity identities} are compared.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} a\n// @param {module:engine/view/attributeelement~AttributeElement} b\n// @returns {Boolean}\nfunction shouldABeOutsideB( a, b ) {\n\tif ( a.priority < b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority > b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use identities.\n\treturn a.getIdentity() < b.getIdentity();\n}\n\n// Returns new position that is moved to near text node. Returns same position if there is no text node before of after\n// specified position.\n//\n//\t\t<p>foo[]</p> -> <p>foo{}</p>\n//\t\t<p>[]foo</p> -> <p>{}foo</p>\n//\n// @param {module:engine/view/position~Position} position\n// @returns {module:engine/view/position~Position} Position located inside text node or same position if there is no text nodes\n// before or after position location.\nfunction movePositionToTextNode( position ) {\n\tconst nodeBefore = position.nodeBefore;\n\n\tif ( nodeBefore && nodeBefore.is( 'text' ) ) {\n\t\treturn new Position( nodeBefore, nodeBefore.data.length );\n\t}\n\n\tconst nodeAfter = position.nodeAfter;\n\n\tif ( nodeAfter && nodeAfter.is( 'text' ) ) {\n\t\treturn new Position( nodeAfter, 0 );\n\t}\n\n\treturn position;\n}\n\n// Breaks text node into two text nodes when possible.\n//\n//\t\t<p>foo{}bar</p> -> <p>foo[]bar</p>\n//\t\t<p>{}foobar</p> -> <p>[]foobar</p>\n//\t\t<p>foobar{}</p> -> <p>foobar[]</p>\n//\n// @param {module:engine/view/position~Position} position Position that need to be placed inside text node.\n// @returns {module:engine/view/position~Position} New position after breaking text node.\nfunction breakTextNode( position ) {\n\tif ( position.offset == position.parent.data.length ) {\n\t\treturn new Position( position.parent.parent, position.parent.index + 1 );\n\t}\n\n\tif ( position.offset === 0 ) {\n\t\treturn new Position( position.parent.parent, position.parent.index );\n\t}\n\n\t// Get part of the text that need to be moved.\n\tconst textToMove = position.parent.data.slice( position.offset );\n\n\t// Leave rest of the text in position's parent.\n\tposition.parent._data = position.parent.data.slice( 0, position.offset );\n\n\t// Insert new text node after position's parent text node.\n\tposition.parent.parent._insertChild( position.parent.index + 1, new Text( textToMove ) );\n\n\t// Return new position between two newly created text nodes.\n\treturn new Position( position.parent.parent, position.parent.index + 1 );\n}\n\n// Merges two text nodes into first node. Removes second node and returns merge position.\n//\n// @param {module:engine/view/text~Text} t1 First text node to merge. Data from second text node will be moved at the end of\n// this text node.\n// @param {module:engine/view/text~Text} t2 Second text node to merge. This node will be removed after merging.\n// @returns {module:engine/view/position~Position} Position after merging text nodes.\nfunction mergeTextNodes( t1, t2 ) {\n\t// Merge text data into first text node and remove second one.\n\tconst nodeBeforeLength = t1.data.length;\n\tt1._data += t2.data;\n\tt2._remove();\n\n\treturn new Position( t1, nodeBeforeLength );\n}\n\n// Checks if provided nodes are valid to insert. Checks if each node is an instance of\n// {@link module:engine/view/text~Text Text} or {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n// {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElement} or\n// {@link module:engine/view/uielement~UIElement UIElement}.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n// contains instances that are not {@link module:engine/view/text~Text Texts},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElements},\n// {@link module:engine/view/uielement~UIElement UIElements},\n// {@link module:engine/view/attributeelement~AttributeElement AttributeElements} or\n// {@link module:engine/view/containerelement~ContainerElement ContainerElements}.\n//\n// @param Iterable.<module:engine/view/text~Text|module:engine/view/attributeelement~AttributeElement\n// |module:engine/view/containerelement~ContainerElement> nodes\n// @param {Object} errorContext\nfunction validateNodesToInsert( nodes, errorContext ) {\n\tfor ( const node of nodes ) {\n\t\tif ( !validNodesToInsert.some( ( validNode => node instanceof validNode ) ) ) { // eslint-disable-line no-use-before-define\n\t\t\t/**\n\t\t\t * Inserted nodes should be valid to insert. of {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n\t\t\t * {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n\t\t\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElement},\n\t\t\t * {@link module:engine/view/uielement~UIElement UIElement}, {@link module:engine/view/text~Text Text}.\n\t\t\t *\n\t\t\t * @error view-writer-insert-invalid-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-insert-invalid-node', errorContext );\n\t\t}\n\n\t\tif ( !node.is( 'text' ) ) {\n\t\t\tvalidateNodesToInsert( node.getChildren(), errorContext );\n\t\t}\n\t}\n}\n\nconst validNodesToInsert = [ Text, AttributeElement, ContainerElement, EmptyElement, UIElement ];\n\n// Checks if node is ContainerElement or DocumentFragment, because in most cases they should be treated the same way.\n//\n// @param {module:engine/view/node~Node} node\n// @returns {Boolean} Returns `true` if node is instance of ContainerElement or DocumentFragment.\nfunction isContainerOrFragment( node ) {\n\treturn node && ( node.is( 'containerElement' ) || node.is( 'documentFragment' ) );\n}\n\n// Checks if {@link module:engine/view/range~Range#start range start} and {@link module:engine/view/range~Range#end range end} are placed\n// inside same {@link module:engine/view/containerelement~ContainerElement container element}.\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when validation fails.\n//\n// @param {module:engine/view/range~Range} range\n// @param {Object} errorContext\nfunction validateRangeContainer( range, errorContext ) {\n\tconst startContainer = getParentContainer( range.start );\n\tconst endContainer = getParentContainer( range.end );\n\n\tif ( !startContainer || !endContainer || startContainer !== endContainer ) {\n\t\t/**\n\t\t * Range container is invalid. This can happen if {@link module:engine/view/range~Range#start range start} and\n\t\t * {@link module:engine/view/range~Range#end range end} positions are not placed inside same container or\n\t\t * parent container for these positions cannot be found.\n\t\t *\n\t\t * @error view-writer-invalid-range-container\n\t\t */\n\n\t\tthrow new CKEditorError( 'view-writer-invalid-range-container', errorContext );\n\t}\n}\n\n// Checks if two attribute elements can be joined together. Elements can be joined together if, and only if\n// they do not have ids specified.\n//\n// @private\n// @param {module:engine/view/element~Element} a\n// @param {module:engine/view/element~Element} b\n// @returns {Boolean}\nfunction canBeJoined( a, b ) {\n\treturn a.id === null && b.id === null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/istext\n */\n\n/**\n * Checks if the object is a native DOM Text node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isText( obj ) {\n\treturn Object.prototype.toString.call( obj ) == '[object Text]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\n\n/**\n * Set of utils related to block and inline fillers handling.\n *\n * Browsers do not allow to put caret in elements which does not have height. Because of it, we need to fill all\n * empty elements which should be selectable with elements or characters called \"fillers\". Unfortunately there is no one\n * universal filler, this is why two types are uses:\n *\n * * Block filler is an element which fill block elements, like `<p>`. CKEditor uses `<br>` as a block filler during the editing,\n * as browsers do natively. So instead of an empty `<p>` there will be `<p><br></p>`. The advantage of block filler is that\n * it is transparent for the selection, so when the caret is before the `<br>` and user presses right arrow he will be\n * moved to the next paragraph, not after the `<br>`. The disadvantage is that it breaks a block, so it can not be used\n * in the middle of a line of text. The {@link module:engine/view/filler~BR_FILLER `<br>` filler} can be replaced with any other\n * character in the data output, for instance {@link module:engine/view/filler~NBSP_FILLER non-breaking space}.\n *\n * * Inline filler is a filler which does not break a line of text, so it can be used inside the text, for instance in the empty\n * `<b>` surrendered by text: `foo<b></b>bar`, if we want to put the caret there. CKEditor uses a sequence of the zero-width\n * spaces as an {@link module:engine/view/filler~INLINE_FILLER inline filler} having the predetermined\n * {@link module:engine/view/filler~INLINE_FILLER_LENGTH length}. A sequence is used, instead of a single character to\n * avoid treating random zero-width spaces as the inline filler. Disadvantage of the inline filler is that it is not\n * transparent for the selection. The arrow key moves the caret between zero-width spaces characters, so the additional\n * code is needed to handle the caret.\n *\n * Both inline and block fillers are handled by the {@link module:engine/view/renderer~Renderer renderer} and are not present in the\n * view.\n *\n * @module engine/view/filler\n */\n\n/**\n * Non-breaking space filler creator. This is a function which creates ` ` text node.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~BR_FILLER\n * @function\n */\nexport const NBSP_FILLER = domDocument => domDocument.createTextNode( '\\u00A0' );\n\n/**\n * `<br>` filler creator. This is a function which creates `<br data-cke-filler=\"true\">` element.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~NBSP_FILLER\n * @function\n */\nexport const BR_FILLER = domDocument => {\n\tconst fillerBr = domDocument.createElement( 'br' );\n\tfillerBr.dataset.ckeFiller = true;\n\n\treturn fillerBr;\n};\n\n/**\n * Length of the {@link module:engine/view/filler~INLINE_FILLER INLINE_FILLER}.\n */\nexport const INLINE_FILLER_LENGTH = 7;\n\n/**\n * Inline filler which is a sequence of the zero width spaces.\n */\nexport const INLINE_FILLER = ( () => {\n\tlet inlineFiller = '';\n\n\tfor ( let i = 0; i < INLINE_FILLER_LENGTH; i++ ) {\n\t\tinlineFiller += '\\u200b';\n\t}\n\n\treturn inlineFiller;\n} )(); // Usu IIF so the INLINE_FILLER appears as a constant in the docs.\n\n/**\n * Checks if the node is a text node which starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( 'foo' ) ); // false\n *\t\tstartsWithFiller( document.createElement( 'p' ) ); // false\n *\n * @param {Node} domNode DOM node.\n * @returns {Boolean} True if the text node starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function startsWithFiller( domNode ) {\n\treturn isText( domNode ) && ( domNode.data.substr( 0, INLINE_FILLER_LENGTH ) === INLINE_FILLER );\n}\n\n/**\n * Checks if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // false\n *\n * @param {Text} domText DOM text node.\n * @returns {Boolean} True if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function isInlineFiller( domText ) {\n\treturn domText.data.length == INLINE_FILLER_LENGTH && startsWithFiller( domText );\n}\n\n/**\n * Get string data from the text node, removing an {@link module:engine/view/filler~INLINE_FILLER inline filler} from it,\n * if text node contains it.\n *\n *\t\tgetDataWithoutFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ) == 'foo' // true\n *\t\tgetDataWithoutFiller( document.createTextNode( 'foo' ) ) == 'foo' // true\n *\n * @param {Text} domText DOM text node, possible with inline filler.\n * @returns {String} Data without filler.\n */\nexport function getDataWithoutFiller( domText ) {\n\tif ( startsWithFiller( domText ) ) {\n\t\treturn domText.data.slice( INLINE_FILLER_LENGTH );\n\t} else {\n\t\treturn domText.data;\n\t}\n}\n\n/**\n * Assign key observer which move cursor from the end of the inline filler to the beginning of it when\n * the left arrow is pressed, so the filler does not break navigation.\n *\n * @param {module:engine/view/view~View} view View controller instance we should inject quirks handling on.\n */\nexport function injectQuirksHandling( view ) {\n\tview.document.on( 'keydown', jumpOverInlineFiller );\n}\n\n// Move cursor from the end of the inline filler to the beginning of it when, so the filler does not break navigation.\nfunction jumpOverInlineFiller( evt, data ) {\n\tif ( data.keyCode == keyCodes.arrowleft ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\tif ( domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed ) {\n\t\t\tconst domParent = domSelection.getRangeAt( 0 ).startContainer;\n\t\t\tconst domOffset = domSelection.getRangeAt( 0 ).startOffset;\n\n\t\t\tif ( startsWithFiller( domParent ) && domOffset <= INLINE_FILLER_LENGTH ) {\n\t\t\t\tdomSelection.collapse( domParent, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/fastdiff\n */\n\n/**\n * Finds positions of the first and last change in the given string/array and generates a set of changes:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ { index: 2, type: 'insert', values: [ 'x', 'y', 'z' ] } ]\n *\n *\t\tfastDiff( '12a', '12aa' );\n *\t\t// [ { index: 3, type: 'insert', values: [ 'a' ] } ]\n *\n *\t\tfastDiff( '12xyza', '12a' );\n *\t\t// [ { index: 2, type: 'delete', howMany: 3 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'a' ], [ '1', '2', 'a' ] );\n *\t\t// [ { index: 3, type: 'delete', howMany: 1 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'b', 'c', '3' ], [ '2', 'a', 'b' ] );\n *\t\t// [ { index: 0, type: 'insert', values: [ '2', 'a', 'b' ] }, { index: 3, type: 'delete', howMany: 6 } ]\n *\n * Passed arrays can contain any type of data, however to compare them correctly custom comparator function\n * should be passed as a third parameter:\n *\n *\t\tfastDiff( [ { value: 1 }, { value: 2 } ], [ { value: 1 }, { value: 3 } ], ( a, b ) => {\n *\t\t\treturn a.value === b.value;\n *\t\t} );\n *\t\t// [ { index: 1, type: 'insert', values: [ { value: 3 } ] }, { index: 2, type: 'delete', howMany: 1 } ]\n *\n * The resulted set of changes can be applied to the input in order to transform it into the output, for example:\n *\n *\t\tlet input = '12abc3';\n *\t\tconst output = '2ab';\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + change.values.join( '' ) + input.substring( change.index );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + input.substring( change.index + change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * or in case of arrays:\n *\n *\t\tlet input = [ '1', '2', 'a', 'b', 'c', '3' ];\n *\t\tconst output = [ '2', 'a', 'b' ];\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( change.values, input.slice( change.index ) );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( input.slice( change.index + change.howMany ) );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * By passing `true` as the fourth parameter (`atomicChanges`) the output of this function will become compatible with\n * the {@link module:utils/diff~diff `diff()`} function:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ 'equal', 'equal', 'insert', 'insert', 'insert', 'equal' ]\n *\n * The default output format of this function is compatible with the output format of\n * {@link module:utils/difftochanges~diffToChanges `diffToChanges()`}. The `diffToChanges()` input format is, in turn,\n * compatible with the output of {@link module:utils/diff~diff `diff()`}:\n *\n *\t\tconst a = '1234';\n *\t\tconst b = '12xyz34';\n *\n *\t\t// Both calls will return the same results (grouped changes format).\n *\t\tfastDiff( a, b );\n *\t\tdiffToChanges( diff( a, b ) );\n *\n *\t\t// Again, both calls will return the same results (atomic changes format).\n *\t\tfastDiff( a, b, null, true );\n *\t\tdiff( a, b );\n *\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Input array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default `===` (strict equal operator) is used.\n * @param {Boolean} [atomicChanges=false] Whether an array of `inset|delete|equal` operations should\n * be returned instead of changes set. This makes this function compatible with {@link module:utils/diff~diff `diff()`}.\n * @returns {Array} Array of changes.\n */\nexport default function fastDiff( a, b, cmp, atomicChanges = false ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\t// Transform text or any iterable into arrays for easier, consistent processing.\n\tif ( !Array.isArray( a ) ) {\n\t\ta = Array.from( a );\n\t}\n\n\tif ( !Array.isArray( b ) ) {\n\t\tb = Array.from( b );\n\t}\n\n\t// Find first and last change.\n\tconst changeIndexes = findChangeBoundaryIndexes( a, b, cmp );\n\n\t// Transform into changes array.\n\treturn atomicChanges ? changeIndexesToAtomicChanges( changeIndexes, b.length ) : changeIndexesToChanges( b, changeIndexes );\n}\n\n// Finds position of the first and last change in the given arrays. For example:\n//\n//\t\tconst indexes = findChangeBoundaryIndexes( [ '1', '2', '3', '4' ], [ '1', '3', '4', '2', '4' ] );\n//\t\tconsole.log( indexes ); // { firstIndex: 1, lastIndexOld: 3, lastIndexNew: 4 }\n//\n// The above indexes means that in the first array the modified part is `1[23]4` and in the second array it is `1[342]4`.\n// Based on such indexes, array with `insert`/`delete` operations which allows transforming first value into the second one\n// can be generated.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Object}\n// @returns {Number} return.firstIndex Index of the first change in both values (always the same for both).\n// @returns {Number} result.lastIndexOld Index of the last common value in `arr1`.\n// @returns {Number} result.lastIndexNew Index of the last common value in `arr2`.\nfunction findChangeBoundaryIndexes( arr1, arr2, cmp ) {\n\t// Find the first difference between passed values.\n\tconst firstIndex = findFirstDifferenceIndex( arr1, arr2, cmp );\n\n\t// If arrays are equal return -1 indexes object.\n\tif ( firstIndex === -1 ) {\n\t\treturn { firstIndex: -1, lastIndexOld: -1, lastIndexNew: -1 };\n\t}\n\n\t// Remove the common part of each value and reverse them to make it simpler to find the last difference between them.\n\tconst oldArrayReversed = cutAndReverse( arr1, firstIndex );\n\tconst newArrayReversed = cutAndReverse( arr2, firstIndex );\n\n\t// Find the first difference between reversed values.\n\t// It should be treated as \"how many elements from the end the last difference occurred\".\n\t//\n\t// For example:\n\t//\n\t// \t\t\t\tinitial\t->\tafter cut\t-> reversed:\n\t// oldValue:\t'321ba'\t->\t'21ba'\t\t-> 'ab12'\n\t// newValue:\t'31xba'\t->\t'1xba'\t\t-> 'abx1'\n\t// lastIndex:\t\t\t\t\t\t\t-> 2\n\t//\n\t// So the last change occurred two characters from the end of the arrays.\n\tconst lastIndex = findFirstDifferenceIndex( oldArrayReversed, newArrayReversed, cmp );\n\n\t// Use `lastIndex` to calculate proper offset, starting from the beginning (`lastIndex` kind of starts from the end).\n\tconst lastIndexOld = arr1.length - lastIndex;\n\tconst lastIndexNew = arr2.length - lastIndex;\n\n\treturn { firstIndex, lastIndexOld, lastIndexNew };\n}\n\n// Returns a first index on which given arrays differ. If both arrays are the same, -1 is returned.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Number}\nfunction findFirstDifferenceIndex( arr1, arr2, cmp ) {\n\tfor ( let i = 0; i < Math.max( arr1.length, arr2.length ); i++ ) {\n\t\tif ( arr1[ i ] === undefined || arr2[ i ] === undefined || !cmp( arr1[ i ], arr2[ i ] ) ) {\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn -1; // Return -1 if arrays are equal.\n}\n\n// Returns a copy of the given array with `howMany` elements removed starting from the beginning and in reversed order.\n//\n// @param {Array} arr Array to be processed.\n// @param {Number} howMany How many elements from array beginning to remove.\n// @returns {Array} Shortened and reversed array.\nfunction cutAndReverse( arr, howMany ) {\n\treturn arr.slice( howMany ).reverse();\n}\n\n// Generates changes array based on change indexes from `findChangeBoundaryIndexes` function. This function will\n// generate array with 0 (no changes), 1 (deletion or insertion) or 2 records (insertion and deletion).\n//\n// @param {Array} newArray New array for which change indexes were calculated.\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @returns {Array.<Object>} Array of changes compatible with {@link module:utils/difftochanges~diffToChanges} format.\nfunction changeIndexesToChanges( newArray, changeIndexes ) {\n\tconst result = [];\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// Order operations as 'insert', 'delete' array to keep compatibility with {@link module:utils/difftochanges~diffToChanges}\n\t// in most cases. However, 'diffToChanges' does not stick to any order so in some cases\n\t// (for example replacing '12345' with 'abcd') it will generate 'delete', 'insert' order.\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex,\n\t\t\ttype: 'insert',\n\t\t\tvalues: newArray.slice( firstIndex, lastIndexNew )\n\t\t} );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex + ( lastIndexNew - firstIndex ), // Increase index of what was inserted.\n\t\t\ttype: 'delete',\n\t\t\thowMany: lastIndexOld - firstIndex\n\t\t} );\n\t}\n\n\treturn result;\n}\n\n// Generates array with set `equal|insert|delete` operations based on change indexes from `findChangeBoundaryIndexes` function.\n//\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @param {Number} newLength Length of the new array on which `findChangeBoundaryIndexes` calculated change indexes.\n// @returns {Array.<String>} Array of changes compatible with {@link module:utils/diff~diff} format.\nfunction changeIndexesToAtomicChanges( changeIndexes, newLength ) {\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// No changes.\n\tif ( firstIndex === -1 ) {\n\t\treturn Array( newLength ).fill( 'equal' );\n\t}\n\n\tlet result = [];\n\tif ( firstIndex > 0 ) {\n\t\tresult = result.concat( Array( firstIndex ).fill( 'equal' ) );\n\t}\n\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexNew - firstIndex ).fill( 'insert' ) );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexOld - firstIndex ).fill( 'delete' ) );\n\t}\n\n\tif ( lastIndexNew < newLength ) {\n\t\tresult = result.concat( Array( newLength - lastIndexNew ).fill( 'equal' ) );\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/diff\n */\n\nimport fastDiff from '../src/fastdiff';\n\n// The following code is based on the \"O(NP) Sequence Comparison Algorithm\"\n// by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n\n/**\n * Calculates the difference between two arrays or strings producing an array containing a list of changes\n * necessary to transform input into output.\n *\n *\t\tdiff( 'aba', 'acca' ); // [ 'equal', 'insert', 'insert', 'delete', 'equal' ]\n *\n * This function is based on the \"O(NP) Sequence Comparison Algorithm\" by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n * Unfortunately, while it gives the most precise results, its to complex for longer strings/arrow (above 200 items).\n * Therefore, `diff()` automatically switches to {@link module:utils/fastdiff~fastDiff `fastDiff()`} when detecting\n * such a scenario. The return formats of both functions are identical.\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Output array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default === is used.\n * @returns {Array} Array of changes.\n */\nexport default function diff( a, b, cmp ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\tconst aLength = a.length;\n\tconst bLength = b.length;\n\n\t// Perform `fastDiff` for longer strings/arrays (see #269).\n\tif ( aLength > 200 || bLength > 200 || aLength + bLength > 300 ) {\n\t\treturn diff.fastDiff( a, b, cmp, true );\n\t}\n\n\t// Temporary action type statics.\n\tlet _insert, _delete;\n\n\t// Swapped the arrays to use the shorter one as the first one.\n\tif ( bLength < aLength ) {\n\t\tconst tmp = a;\n\n\t\ta = b;\n\t\tb = tmp;\n\n\t\t// We swap the action types as well.\n\t\t_insert = 'delete';\n\t\t_delete = 'insert';\n\t} else {\n\t\t_insert = 'insert';\n\t\t_delete = 'delete';\n\t}\n\n\tconst m = a.length;\n\tconst n = b.length;\n\tconst delta = n - m;\n\n\t// Edit scripts, for each diagonal.\n\tconst es = {};\n\t// Furthest points, the furthest y we can get on each diagonal.\n\tconst fp = {};\n\n\tfunction snake( k ) {\n\t\t// We use -1 as an alternative below to handle initial values ( instead of filling the fp with -1 first ).\n\t\t// Furthest points (y) on the diagonal below k.\n\t\tconst y1 = ( fp[ k - 1 ] !== undefined ? fp[ k - 1 ] : -1 ) + 1;\n\t\t// Furthest points (y) on the diagonal above k.\n\t\tconst y2 = fp[ k + 1 ] !== undefined ? fp[ k + 1 ] : -1;\n\t\t// The way we should go to get further.\n\t\tconst dir = y1 > y2 ? -1 : 1;\n\n\t\t// Clone previous changes array (if any).\n\t\tif ( es[ k + dir ] ) {\n\t\t\tes[ k ] = es[ k + dir ].slice( 0 );\n\t\t}\n\n\t\t// Create changes array.\n\t\tif ( !es[ k ] ) {\n\t\t\tes[ k ] = [];\n\t\t}\n\n\t\t// Push the action.\n\t\tes[ k ].push( y1 > y2 ? _insert : _delete );\n\n\t\t// Set the beginning coordinates.\n\t\tlet y = Math.max( y1, y2 );\n\t\tlet x = y - k;\n\n\t\t// Traverse the diagonal as long as the values match.\n\t\twhile ( x < m && y < n && cmp( a[ x ], b[ y ] ) ) {\n\t\t\tx++;\n\t\t\ty++;\n\t\t\t// Push no change action.\n\t\t\tes[ k ].push( 'equal' );\n\t\t}\n\n\t\treturn y;\n\t}\n\n\tlet p = 0;\n\tlet k;\n\n\t// Traverse the graph until we reach the end of the longer string.\n\tdo {\n\t\t// Updates furthest points and edit scripts for diagonals below delta.\n\t\tfor ( k = -p; k < delta; k++ ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest points and edit scripts for diagonals above delta.\n\t\tfor ( k = delta + p; k > delta; k-- ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest point and edit script for the delta diagonal.\n\t\t// note that the delta diagonal is the one which goes through the sink (m, n).\n\t\tfp[ delta ] = snake( delta );\n\n\t\tp++;\n\t} while ( fp[ delta ] !== n );\n\n\t// Return the final list of edit changes.\n\t// We remove the first item that represents the action for the injected nulls.\n\treturn es[ delta ].slice( 1 );\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\ndiff.fastDiff = fastDiff;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/insertat\n */\n\n/**\n * Inserts node to the parent at given index.\n *\n * @param {Element} parentElement Parent element.\n * @param {Number} index Insertions index.\n * @param {Node} nodeToInsert Node to insert.\n */\nexport default function insertAt( parentElement, index, nodeToInsert ) {\n\tparentElement.insertBefore( nodeToInsert, parentElement.childNodes[ index ] || null );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/remove\n */\n\n/**\n * Removes given node from parent.\n *\n * @param {Node} node Node to remove.\n */\nexport default function remove( node ) {\n\tconst parent = node.parentNode;\n\n\tif ( parent ) {\n\t\tparent.removeChild( node );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isnode\n */\n\n/**\n * Checks if the object is a native DOM Node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isNode( obj ) {\n\tif ( obj ) {\n\t\tif ( obj.defaultView ) {\n\t\t\treturn obj instanceof obj.defaultView.Document;\n\t\t} else if ( obj.ownerDocument && obj.ownerDocument.defaultView ) {\n\t\t\treturn obj instanceof obj.ownerDocument.defaultView.Node;\n\t\t}\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module engine/view/renderer\n */\n\nimport ViewText from './text';\nimport ViewPosition from './position';\nimport { INLINE_FILLER, INLINE_FILLER_LENGTH, startsWithFiller, isInlineFiller } from './filler';\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport insertAt from '@ckeditor/ckeditor5-utils/src/dom/insertat';\nimport remove from '@ckeditor/ckeditor5-utils/src/dom/remove';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport fastDiff from '@ckeditor/ckeditor5-utils/src/fastdiff';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Renderer is responsible for updating the DOM structure and the DOM selection based on\n * the {@link module:engine/view/renderer~Renderer#markToSync information about updated view nodes}.\n * In other words, it renders the view to the DOM.\n *\n * Its main responsibility is to make only the necessary, minimal changes to the DOM. However, unlike in many\n * virtual DOM implementations, the primary reason for doing minimal changes is not the performance but ensuring\n * that native editing features such as text composition, autocompletion, spell checking, selection's x-index are\n * affected as little as possible.\n *\n * Renderer uses {@link module:engine/view/domconverter~DomConverter} to transform view nodes and positions\n * to and from the DOM.\n */\nexport default class Renderer {\n\t/**\n\t * Creates a renderer instance.\n\t *\n\t * @param {module:engine/view/domconverter~DomConverter} domConverter Converter instance.\n\t * @param {module:engine/view/documentselection~DocumentSelection} selection View selection.\n\t */\n\tconstructor( domConverter, selection ) {\n\t\t/**\n\t\t * Set of DOM Documents instances.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<Document>}\n\t\t */\n\t\tthis.domDocuments = new Set();\n\n\t\t/**\n\t\t * Converter instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = domConverter;\n\n\t\t/**\n\t\t * Set of nodes which attributes changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedAttributes = new Set();\n\n\t\t/**\n\t\t * Set of elements which child lists changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedChildren = new Set();\n\n\t\t/**\n\t\t * Set of text nodes which text data changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedTexts = new Set();\n\n\t\t/**\n\t\t * View selection. Renderer updates DOM selection based on the view selection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = selection;\n\n\t\t/**\n\t\t * Indicates if the view document is focused and selection can be rendered. Selection will not be rendered if\n\t\t * this is set to `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isFocused = false;\n\n\t\t/**\n\t\t * The text node in which the inline filler was rendered.\n\t\t *\n\t\t * @private\n\t\t * @member {Text}\n\t\t */\n\t\tthis._inlineFiller = null;\n\n\t\t/**\n\t\t * DOM element containing fake selection.\n\t\t *\n\t\t * @private\n\t\t * @type {null|HTMLElement}\n\t\t */\n\t\tthis._fakeSelectionContainer = null;\n\t}\n\n\t/**\n\t * Marks a view node to be updated in the DOM by {@link #render `render()`}.\n\t *\n\t * Note that only view nodes whose parents have corresponding DOM elements need to be marked to be synchronized.\n\t *\n\t * @see #markedAttributes\n\t * @see #markedChildren\n\t * @see #markedTexts\n\t *\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Node to be marked.\n\t */\n\tmarkToSync( type, node ) {\n\t\tif ( type === 'text' ) {\n\t\t\tif ( this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis.markedTexts.add( node );\n\t\t\t}\n\t\t} else {\n\t\t\t// If the node has no DOM element it is not rendered yet,\n\t\t\t// its children/attributes do not need to be marked to be sync.\n\t\t\tif ( !this.domConverter.mapViewToDom( node ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( type === 'attributes' ) {\n\t\t\t\tthis.markedAttributes.add( node );\n\t\t\t} else if ( type === 'children' ) {\n\t\t\t\tthis.markedChildren.add( node );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * Unknown type passed to Renderer.markToSync.\n\t\t\t\t *\n\t\t\t\t * @error renderer-unknown-type\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.', this );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders all buffered changes ({@link #markedAttributes}, {@link #markedChildren} and {@link #markedTexts}) and\n\t * the current view selection (if needed) to the DOM by applying a minimal set of changes to it.\n\t *\n\t * Renderer tries not to break the text composition (e.g. IME) and x-index of the selection,\n\t * so it does as little as it is needed to update the DOM.\n\t *\n\t * Renderer also handles {@link module:engine/view/filler fillers}. Especially, it checks if the inline filler is needed\n\t * at the selection position and adds or removes it. To prevent breaking text composition inline filler will not be\n\t * removed as long as the selection is in the text node which needed it at first.\n\t */\n\trender() {\n\t\tlet inlineFillerPosition;\n\n\t\t// Refresh mappings.\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildrenMappings( element );\n\t\t}\n\n\t\t// There was inline filler rendered in the DOM but it's not\n\t\t// at the selection position any more, so we can remove it\n\t\t// (cause even if it's needed, it must be placed in another location).\n\t\tif ( this._inlineFiller && !this._isSelectionInInlineFiller() ) {\n\t\t\tthis._removeInlineFiller();\n\t\t}\n\n\t\t// If we've got the filler, let's try to guess its position in the view.\n\t\tif ( this._inlineFiller ) {\n\t\t\tinlineFillerPosition = this._getInlineFillerPosition();\n\t\t}\n\t\t// Otherwise, if it's needed, create it at the selection position.\n\t\telse if ( this._needsInlineFillerAtSelection() ) {\n\t\t\tinlineFillerPosition = this.selection.getFirstPosition();\n\n\t\t\t// Do not use `markToSync` so it will be added even if the parent is already added.\n\t\t\tthis.markedChildren.add( inlineFillerPosition.parent );\n\t\t}\n\n\t\tfor ( const element of this.markedAttributes ) {\n\t\t\tthis._updateAttrs( element );\n\t\t}\n\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildren( element, { inlineFillerPosition } );\n\t\t}\n\n\t\tfor ( const node of this.markedTexts ) {\n\t\t\tif ( !this.markedChildren.has( node.parent ) && this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis._updateText( node, { inlineFillerPosition } );\n\t\t\t}\n\t\t}\n\n\t\t// Check whether the inline filler is required and where it really is in the DOM.\n\t\t// At this point in most cases it will be in the DOM, but there are exceptions.\n\t\t// For example, if the inline filler was deep in the created DOM structure, it will not be created.\n\t\t// Similarly, if it was removed at the beginning of this function and then neither text nor children were updated,\n\t\t// it will not be present.\n\t\t// Fix those and similar scenarios.\n\t\tif ( inlineFillerPosition ) {\n\t\t\tconst fillerDomPosition = this.domConverter.viewPositionToDom( inlineFillerPosition );\n\t\t\tconst domDocument = fillerDomPosition.parent.ownerDocument;\n\n\t\t\tif ( !startsWithFiller( fillerDomPosition.parent ) ) {\n\t\t\t\t// Filler has not been created at filler position. Create it now.\n\t\t\t\tthis._inlineFiller = addInlineFiller( domDocument, fillerDomPosition.parent, fillerDomPosition.offset );\n\t\t\t} else {\n\t\t\t\t// Filler has been found, save it.\n\t\t\t\tthis._inlineFiller = fillerDomPosition.parent;\n\t\t\t}\n\t\t} else {\n\t\t\t// There is no filler needed.\n\t\t\tthis._inlineFiller = null;\n\t\t}\n\n\t\tthis._updateSelection();\n\t\tthis._updateFocus();\n\n\t\tthis.markedTexts.clear();\n\t\tthis.markedAttributes.clear();\n\t\tthis.markedChildren.clear();\n\t}\n\n\t/**\n\t * Updates mappings of view element's children.\n\t *\n\t * Children that were replaced in the view structure by similar elements (same tag name) are treated as 'replaced'.\n\t * This means that their mappings can be updated so the new view elements are mapped to the existing DOM elements.\n\t * Thanks to that these elements do not need to be re-rendered completely.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose children mappings will be updated.\n\t */\n\t_updateChildrenMappings( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM and there is no need to process it.\n\t\t\treturn;\n\t\t}\n\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { withChildren: false } )\n\t\t);\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\t\tconst actions = this._findReplaceActions( diff, actualDomChildren, expectedDomChildren );\n\n\t\tif ( actions.indexOf( 'replace' ) !== -1 ) {\n\t\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'replace' ) {\n\t\t\t\t\tconst insertIndex = counter.equal + counter.insert;\n\t\t\t\t\tconst deleteIndex = counter.equal + counter.delete;\n\t\t\t\t\tconst viewChild = viewElement.getChild( insertIndex );\n\n\t\t\t\t\t// The 'uiElement' is a special one and its children are not stored in a view (#799),\n\t\t\t\t\t// so we cannot use it with replacing flow (since it uses view children during rendering\n\t\t\t\t\t// which will always result in rendering empty element).\n\t\t\t\t\tif ( viewChild && !viewChild.is( 'uiElement' ) ) {\n\t\t\t\t\t\tthis._updateElementMappings( viewChild, actualDomChildren[ deleteIndex ] );\n\t\t\t\t\t}\n\n\t\t\t\t\tremove( expectedDomChildren[ insertIndex ] );\n\t\t\t\t\tcounter.equal++;\n\t\t\t\t} else {\n\t\t\t\t\tcounter[ action ]++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Updates mappings of a given view element.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose mappings will be updated.\n\t * @param {Node} domElement The DOM element representing the given view element.\n\t */\n\t_updateElementMappings( viewElement, domElement ) {\n\t\t// Remap 'DomConverter' bindings.\n\t\tthis.domConverter.unbindDomElement( domElement );\n\t\tthis.domConverter.bindElements( domElement, viewElement );\n\n\t\t// View element may have children which needs to be updated, but are not marked, mark them to update.\n\t\tthis.markedChildren.add( viewElement );\n\n\t\t// Because we replace new view element mapping with the existing one, the corresponding DOM element\n\t\t// will not be rerendered. The new view element may have different attributes than the previous one.\n\t\t// Since its corresponding DOM element will not be rerendered, new attributes will not be added\n\t\t// to the DOM, so we need to mark it here to make sure its attributes gets updated. See #1427 for more\n\t\t// detailed case study.\n\t\t// Also there are cases where replaced element is removed from the view structure and then has\n\t\t// its attributes changed or removed. In such cases the element will not be present in `markedAttributes`\n\t\t// and also may be the same (`element.isSimilar()`) as the reused element not having its attributes updated.\n\t\t// To prevent such situations we always mark reused element to have its attributes rerenderd (#1560).\n\t\tthis.markedAttributes.add( viewElement );\n\t}\n\n\t/**\n\t * Gets the position of the inline filler based on the current selection.\n\t * Here, we assume that we know that the filler is needed and\n\t * {@link #_isSelectionInInlineFiller is at the selection position}, and, since it is needed,\n\t * it is somewhere at the selection position.\n\t *\n\t * Note: The filler position cannot be restored based on the filler's DOM text node, because\n\t * when this method is called (before rendering), the bindings will often be broken. View-to-DOM\n\t * bindings are only dependable after rendering.\n\t *\n\t * @private\n\t * @returns {module:engine/view/position~Position}\n\t */\n\t_getInlineFillerPosition() {\n\t\tconst firstPos = this.selection.getFirstPosition();\n\n\t\tif ( firstPos.parent.is( 'text' ) ) {\n\t\t\treturn ViewPosition._createBefore( this.selection.getFirstPosition().parent );\n\t\t} else {\n\t\t\treturn firstPos;\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` if the selection has not left the inline filler's text node.\n\t * If it is `true`, it means that the filler had been added for a reason and the selection did not\n\t * leave the filler's text node. For example, the user can be in the middle of a composition so it should not be touched.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler and selection are in the same place.\n\t */\n\t_isSelectionInInlineFiller() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Note, we can't check if selection's position equals position of the\n\t\t// this._inlineFiller node, because of #663. We may not be able to calculate\n\t\t// the filler's position in the view at this stage.\n\t\t// Instead, we check it the other way – whether selection is anchored in\n\t\t// that text node or next to it.\n\n\t\t// Possible options are:\n\t\t// \"FILLER{}\"\n\t\t// \"FILLERadded-text{}\"\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst position = this.domConverter.viewPositionToDom( selectionPosition );\n\n\t\tif ( position && isText( position.parent ) && startsWithFiller( position.parent ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes the inline filler.\n\t *\n\t * @private\n\t */\n\t_removeInlineFiller() {\n\t\tconst domFillerNode = this._inlineFiller;\n\n\t\t// Something weird happened and the stored node doesn't contain the filler's text.\n\t\tif ( !startsWithFiller( domFillerNode ) ) {\n\t\t\t/**\n\t\t\t * The inline filler node was lost. Most likely, something overwrote the filler text node\n\t\t\t * in the DOM.\n\t\t\t *\n\t\t\t * @error view-renderer-filler-was-lost\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-renderer-filler-was-lost: The inline filler node was lost.', this );\n\t\t}\n\n\t\tif ( isInlineFiller( domFillerNode ) ) {\n\t\t\tdomFillerNode.parentNode.removeChild( domFillerNode );\n\t\t} else {\n\t\t\tdomFillerNode.data = domFillerNode.data.substr( INLINE_FILLER_LENGTH );\n\t\t}\n\n\t\tthis._inlineFiller = null;\n\t}\n\n\t/**\n\t * Checks if the inline {@link module:engine/view/filler filler} should be added.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler should be added.\n\t */\n\t_needsInlineFillerAtSelection() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst selectionParent = selectionPosition.parent;\n\t\tconst selectionOffset = selectionPosition.offset;\n\n\t\t// If there is no DOM root we do not care about fillers.\n\t\tif ( !this.domConverter.mapViewToDom( selectionParent.root ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !( selectionParent.is( 'element' ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Prevent adding inline filler inside elements with contenteditable=false.\n\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1170\n\t\tif ( !isEditable( selectionParent ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// We have block filler, we do not need inline one.\n\t\tif ( selectionOffset === selectionParent.getFillerOffset() ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst nodeBefore = selectionPosition.nodeBefore;\n\t\tconst nodeAfter = selectionPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText || nodeAfter instanceof ViewText ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks if text needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} viewText View text to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateText( viewText, options ) {\n\t\tconst domText = this.domConverter.findCorrespondingDomText( viewText );\n\t\tconst newDomText = this.domConverter.viewToDom( viewText, domText.ownerDocument );\n\n\t\tconst actualText = domText.data;\n\t\tlet expectedText = newDomText.data;\n\n\t\tconst filler = options.inlineFillerPosition;\n\n\t\tif ( filler && filler.parent == viewText.parent && filler.offset == viewText.index ) {\n\t\t\texpectedText = INLINE_FILLER + expectedText;\n\t\t}\n\n\t\tif ( actualText != expectedText ) {\n\t\t\tconst actions = fastDiff( actualText, expectedText );\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action.type === 'insert' ) {\n\t\t\t\t\tdomText.insertData( action.index, action.values.join( '' ) );\n\t\t\t\t} else { // 'delete'\n\t\t\t\t\tdomText.deleteData( action.index, action.howMany );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if attribute list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement The view element to update.\n\t */\n\t_updateAttrs( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that 'viewElement' is outdated as its mapping was updated\n\t\t\t// in 'this._updateChildrenMappings()'. There is no need to process it as new view element which\n\t\t\t// replaced old 'viewElement' mapping was also added to 'this.markedAttributes'\n\t\t\t// in 'this._updateChildrenMappings()' so it will be processed separately.\n\t\t\treturn;\n\t\t}\n\n\t\tconst domAttrKeys = Array.from( domElement.attributes ).map( attr => attr.name );\n\t\tconst viewAttrKeys = viewElement.getAttributeKeys();\n\n\t\t// Add or overwrite attributes.\n\t\tfor ( const key of viewAttrKeys ) {\n\t\t\tdomElement.setAttribute( key, viewElement.getAttribute( key ) );\n\t\t}\n\n\t\t// Remove from DOM attributes which do not exists in the view.\n\t\tfor ( const key of domAttrKeys ) {\n\t\t\tif ( !viewElement.hasAttribute( key ) ) {\n\t\t\t\tdomElement.removeAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if elements child list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement View element to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateChildren( viewElement, options ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM.\n\t\t\t// There is no need to process it. It will be processed when re-inserted.\n\t\t\treturn;\n\t\t}\n\n\t\tconst inlineFillerPosition = options.inlineFillerPosition;\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { bind: true, inlineFillerPosition } )\n\t\t);\n\n\t\t// Inline filler element has to be created as it is present in the DOM, but not in the view. It is required\n\t\t// during diffing so text nodes could be compared correctly and also during rendering to maintain\n\t\t// proper order and indexes while updating the DOM.\n\t\tif ( inlineFillerPosition && inlineFillerPosition.parent === viewElement ) {\n\t\t\taddInlineFiller( domElement.ownerDocument, expectedDomChildren, inlineFillerPosition.offset );\n\t\t}\n\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\n\t\tlet i = 0;\n\t\tconst nodesToUnbind = new Set();\n\n\t\tfor ( const action of diff ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\tinsertAt( domElement, i, expectedDomChildren[ i ] );\n\t\t\t\ti++;\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tnodesToUnbind.add( actualDomChildren[ i ] );\n\t\t\t\tremove( actualDomChildren[ i ] );\n\t\t\t} else { // 'equal'\n\t\t\t\t// Force updating text nodes inside elements which did not change and do not need to be re-rendered (#1125).\n\t\t\t\tthis._markDescendantTextToSync( this.domConverter.domToView( expectedDomChildren[ i ] ) );\n\t\t\t\ti++;\n\t\t\t}\n\t\t}\n\n\t\t// Unbind removed nodes. When node does not have a parent it means that it was removed from DOM tree during\n\t\t// comparision with the expected DOM. We don't need to check child nodes, because if child node was reinserted,\n\t\t// it was moved to DOM tree out of the removed node.\n\t\tfor ( const node of nodesToUnbind ) {\n\t\t\tif ( !node.parentNode ) {\n\t\t\t\tthis.domConverter.unbindDomElement( node );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Shorthand for diffing two arrays or node lists of DOM nodes.\n\t *\n\t * @private\n\t * @param {Array.<Node>|NodeList} actualDomChildren Actual DOM children\n\t * @param {Array.<Node>|NodeList} expectedDomChildren Expected DOM children.\n\t * @returns {Array.<String>} The list of actions based on the {@link module:utils/diff~diff} function.\n\t */\n\t_diffNodeLists( actualDomChildren, expectedDomChildren ) {\n\t\tactualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );\n\n\t\treturn diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter ) );\n\t}\n\n\t/**\n\t * Finds DOM nodes that were replaced with the similar nodes (same tag name) in the view. All nodes are compared\n\t * within one `insert`/`delete` action group, for example:\n\t *\n\t * \t\tActual DOM:\t\t<p><b>Foo</b>Bar<i>Baz</i><b>Bax</b></p>\n\t * \t\tExpected DOM:\t<p>Bar<b>123</b><i>Baz</i><b>456</b></p>\n\t * \t\tInput actions:\t[ insert, insert, delete, delete, equal, insert, delete ]\n\t * \t\tOutput actions:\t[ insert, replace, delete, equal, replace ]\n\t *\n\t * @private\n\t * @param {Array.<String>} actions Actions array which is a result of the {@link module:utils/diff~diff} function.\n\t * @param {Array.<Node>|NodeList} actualDom Actual DOM children\n\t * @param {Array.<Node>} expectedDom Expected DOM children.\n\t * @returns {Array.<String>} Actions array modified with the `replace` actions.\n\t */\n\t_findReplaceActions( actions, actualDom, expectedDom ) {\n\t\t// If there is no both 'insert' and 'delete' actions, no need to check for replaced elements.\n\t\tif ( actions.indexOf( 'insert' ) === -1 || actions.indexOf( 'delete' ) === -1 ) {\n\t\t\treturn actions;\n\t\t}\n\n\t\tlet newActions = [];\n\t\tlet actualSlice = [];\n\t\tlet expectedSlice = [];\n\n\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\tfor ( const action of actions ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\texpectedSlice.push( expectedDom[ counter.equal + counter.insert ] );\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tactualSlice.push( actualDom[ counter.equal + counter.delete ] );\n\t\t\t} else { // equal\n\t\t\t\tnewActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t\t\t\tnewActions.push( 'equal' );\n\t\t\t\t// Reset stored elements on 'equal'.\n\t\t\t\tactualSlice = [];\n\t\t\t\texpectedSlice = [];\n\t\t\t}\n\t\t\tcounter[ action ]++;\n\t\t}\n\n\t\treturn newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t}\n\n\t/**\n\t * Marks text nodes to be synchronized.\n\t *\n\t * If a text node is passed, it will be marked. If an element is passed, all descendant text nodes inside it will be marked.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewNode View node to sync.\n\t */\n\t_markDescendantTextToSync( viewNode ) {\n\t\tif ( !viewNode ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tthis.markedTexts.add( viewNode );\n\t\t} else if ( viewNode.is( 'element' ) ) {\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tthis._markDescendantTextToSync( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if the selection needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateSelection() {\n\t\t// If there is no selection - remove DOM and fake selections.\n\t\tif ( this.selection.rangeCount === 0 ) {\n\t\t\tthis._removeDomSelection();\n\t\t\tthis._removeFakeSelection();\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst domRoot = this.domConverter.mapViewToDom( this.selection.editableElement );\n\n\t\t// Do nothing if there is no focus, or there is no DOM element corresponding to selection's editable element.\n\t\tif ( !this.isFocused || !domRoot ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Render selection.\n\t\tif ( this.selection.isFake ) {\n\t\t\tthis._updateFakeSelection( domRoot );\n\t\t} else {\n\t\t\tthis._removeFakeSelection();\n\t\t\tthis._updateDomSelection( domRoot );\n\t\t}\n\t}\n\n\t/**\n\t * Updates the fake selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the fake selection container should be added.\n\t */\n\t_updateFakeSelection( domRoot ) {\n\t\tconst domDocument = domRoot.ownerDocument;\n\n\t\tif ( !this._fakeSelectionContainer ) {\n\t\t\tthis._fakeSelectionContainer = createFakeSelectionContainer( domDocument );\n\t\t}\n\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\t// Bind fake selection container with the current selection *position*.\n\t\tthis.domConverter.bindFakeSelection( container, this.selection );\n\n\t\tif ( !this._fakeSelectionNeedsUpdate( domRoot ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !container.parentElement || container.parentElement != domRoot ) {\n\t\t\tdomRoot.appendChild( container );\n\t\t}\n\n\t\tcontainer.textContent = this.selection.fakeSelectionLabel || '\\u00A0';\n\n\t\tconst domSelection = domDocument.getSelection();\n\t\tconst domRange = domDocument.createRange();\n\n\t\tdomSelection.removeAllRanges();\n\t\tdomRange.selectNodeContents( container );\n\t\tdomSelection.addRange( domRange );\n\t}\n\n\t/**\n\t * Updates the DOM selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the DOM selection should be rendered.\n\t */\n\t_updateDomSelection( domRoot ) {\n\t\tconst domSelection = domRoot.ownerDocument.defaultView.getSelection();\n\n\t\t// Let's check whether DOM selection needs updating at all.\n\t\tif ( !this._domSelectionNeedsUpdate( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Multi-range selection is not available in most browsers, and, at least in Chrome, trying to\n\t\t// set such selection, that is not continuous, throws an error. Because of that, we will just use anchor\n\t\t// and focus of view selection.\n\t\t// Since we are not supporting multi-range selection, we also do not need to check if proper editable is\n\t\t// selected. If there is any editable selected, it is okay (editable is taken from selection anchor).\n\t\tconst anchor = this.domConverter.viewPositionToDom( this.selection.anchor );\n\t\tconst focus = this.domConverter.viewPositionToDom( this.selection.focus );\n\n\t\t// Focus the new editing host.\n\t\t// Otherwise, FF may throw an error (https://github.com/ckeditor/ckeditor5/issues/721).\n\t\tdomRoot.focus();\n\n\t\tdomSelection.collapse( anchor.parent, anchor.offset );\n\t\tdomSelection.extend( focus.parent, focus.offset );\n\n\t\t// Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n\t\tif ( env.isGecko ) {\n\t\t\tfixGeckoSelectionAfterBr( focus, domSelection );\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether a given DOM selection needs to be updated.\n\t *\n\t * @private\n\t * @param {Selection} domSelection The DOM selection to check.\n\t * @returns {Boolean}\n\t */\n\t_domSelectionNeedsUpdate( domSelection ) {\n\t\tif ( !this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\t// Current DOM selection is in incorrect position. We need to update it.\n\t\t\treturn true;\n\t\t}\n\n\t\tconst oldViewSelection = domSelection && this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( oldViewSelection && this.selection.isEqual( oldViewSelection ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If selection is not collapsed, it does not need to be updated if it is similar.\n\t\tif ( !this.selection.isCollapsed && this.selection.isSimilar( oldViewSelection ) ) {\n\t\t\t// Selection did not changed and is correct, do not update.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Selections are not similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether the fake selection needs to be updated.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where a new fake selection container should be added.\n\t * @returns {Boolean}\n\t */\n\t_fakeSelectionNeedsUpdate( domRoot ) {\n\t\tconst container = this._fakeSelectionContainer;\n\t\tconst domSelection = domRoot.ownerDocument.getSelection();\n\n\t\t// Fake selection needs to be updated if there's no fake selection container, or the container currently sits\n\t\t// in a different root.\n\t\tif ( !container || container.parentElement !== domRoot ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Make sure that the selection actually is within the fake selection.\n\t\tif ( domSelection.anchorNode !== container && !container.contains( domSelection.anchorNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn container.textContent !== this.selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Removes the DOM selection.\n\t *\n\t * @private\n\t */\n\t_removeDomSelection() {\n\t\tfor ( const doc of this.domDocuments ) {\n\t\t\tconst domSelection = doc.getSelection();\n\n\t\t\tif ( domSelection.rangeCount ) {\n\t\t\t\tconst activeDomElement = doc.activeElement;\n\t\t\t\tconst viewElement = this.domConverter.mapDomToView( activeDomElement );\n\n\t\t\t\tif ( activeDomElement && viewElement ) {\n\t\t\t\t\tdoc.getSelection().removeAllRanges();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes the fake selection.\n\t *\n\t * @private\n\t */\n\t_removeFakeSelection() {\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\tif ( container ) {\n\t\t\tcontainer.remove();\n\t\t}\n\t}\n\n\t/**\n\t * Checks if focus needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateFocus() {\n\t\tif ( this.isFocused ) {\n\t\t\tconst editable = this.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t}\n\t\t}\n\t}\n}\n\nmix( Renderer, ObservableMixin );\n\n// Checks if provided element is editable.\n//\n// @private\n// @param {module:engine/view/element~Element} element\n// @returns {Boolean}\nfunction isEditable( element ) {\n\tif ( element.getAttribute( 'contenteditable' ) == 'false' ) {\n\t\treturn false;\n\t}\n\n\tconst parent = element.findAncestor( element => element.hasAttribute( 'contenteditable' ) );\n\n\treturn !parent || parent.getAttribute( 'contenteditable' ) == 'true';\n}\n\n// Adds inline filler at a given position.\n//\n// The position can be given as an array of DOM nodes and an offset in that array,\n// or a DOM parent element and an offset in that element.\n//\n// @private\n// @param {Document} domDocument\n// @param {Element|Array.<Node>} domParentOrArray\n// @param {Number} offset\n// @returns {Text} The DOM text node that contains an inline filler.\nfunction addInlineFiller( domDocument, domParentOrArray, offset ) {\n\tconst childNodes = domParentOrArray instanceof Array ? domParentOrArray : domParentOrArray.childNodes;\n\tconst nodeAfterFiller = childNodes[ offset ];\n\n\tif ( isText( nodeAfterFiller ) ) {\n\t\tnodeAfterFiller.data = INLINE_FILLER + nodeAfterFiller.data;\n\n\t\treturn nodeAfterFiller;\n\t} else {\n\t\tconst fillerNode = domDocument.createTextNode( INLINE_FILLER );\n\n\t\tif ( Array.isArray( domParentOrArray ) ) {\n\t\t\tchildNodes.splice( offset, 0, fillerNode );\n\t\t} else {\n\t\t\tinsertAt( domParentOrArray, offset, fillerNode );\n\t\t}\n\n\t\treturn fillerNode;\n\t}\n}\n\n// Whether two DOM nodes should be considered as similar.\n// Nodes are considered similar if they have the same tag name.\n//\n// @private\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction areSimilar( node1, node2 ) {\n\treturn isNode( node1 ) && isNode( node2 ) &&\n\t\t!isText( node1 ) && !isText( node2 ) &&\n\t\tnode1.tagName.toLowerCase() === node2.tagName.toLowerCase();\n}\n\n// Whether two dom nodes should be considered as the same.\n// Two nodes which are considered the same are:\n//\n//\t\t* Text nodes with the same text.\n//\t\t* Element nodes represented by the same object.\n//\t\t* Two block filler elements.\n//\n// @private\n// @param {String} blockFillerMode Block filler mode, see {@link module:engine/view/domconverter~DomConverter#blockFillerMode}.\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction sameNodes( domConverter, actualDomChild, expectedDomChild ) {\n\t// Elements.\n\tif ( actualDomChild === expectedDomChild ) {\n\t\treturn true;\n\t}\n\t// Texts.\n\telse if ( isText( actualDomChild ) && isText( expectedDomChild ) ) {\n\t\treturn actualDomChild.data === expectedDomChild.data;\n\t}\n\t// Block fillers.\n\telse if ( domConverter.isBlockFiller( actualDomChild ) &&\n\t\tdomConverter.isBlockFiller( expectedDomChild ) ) {\n\t\treturn true;\n\t}\n\n\t// Not matching types.\n\treturn false;\n}\n\n// The following is a Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n// When the native DOM selection is at the end of the block and preceded by <br /> e.g.\n//\n//\t\t<p>foo<br/>[]</p>\n//\n// which happens a lot when using the soft line break, the browser fails to (visually) move the\n// caret to the new line. A quick fix is as simple as force–refreshing the selection with the same range.\nfunction fixGeckoSelectionAfterBr( focus, domSelection ) {\n\tconst parent = focus.parent;\n\n\t// This fix works only when the focus point is at the very end of an element.\n\t// There is no point in running it in cases unrelated to the browser bug.\n\tif ( parent.nodeType != Node.ELEMENT_NODE || focus.offset != parent.childNodes.length - 1 ) {\n\t\treturn;\n\t}\n\n\tconst childAtOffset = parent.childNodes[ focus.offset ];\n\n\t// To stay on the safe side, the fix being as specific as possible, it targets only the\n\t// selection which is at the very end of the element and preceded by <br />.\n\tif ( childAtOffset && childAtOffset.tagName == 'BR' ) {\n\t\tdomSelection.addRange( domSelection.getRangeAt( 0 ) );\n\t}\n}\n\nfunction filterOutFakeSelectionContainer( domChildList, fakeSelectionContainer ) {\n\tconst childList = Array.from( domChildList );\n\n\tif ( childList.length == 0 || !fakeSelectionContainer ) {\n\t\treturn childList;\n\t}\n\n\tconst last = childList[ childList.length - 1 ];\n\n\tif ( last == fakeSelectionContainer ) {\n\t\tchildList.pop();\n\t}\n\n\treturn childList;\n}\n\n// Creates a fake selection container for a given document.\n//\n// @private\n// @param {Document} domDocument\n// @returns {HTMLElement}\nfunction createFakeSelectionContainer( domDocument ) {\n\tconst container = domDocument.createElement( 'div' );\n\n\tObject.assign( container.style, {\n\t\tposition: 'fixed',\n\t\ttop: 0,\n\t\tleft: '-9999px',\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/752.\n\t\twidth: '42px'\n\t} );\n\n\t// Fill it with a text node so we can update it later.\n\tcontainer.textContent = '\\u00A0';\n\n\treturn container;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module utils/dom/global\n */\n\n/**\n * A helper (module) giving an access to the global DOM objects such as `window` and\n * `document`. Accessing these objects using this helper allows easy and bulletproof\n * testing, i.e. stubbing native properties:\n *\n *\t\timport global from 'ckeditor5/utils/dom/global.js';\n *\n *\t\t// This stub will work for any code using global module.\n *\t\ttestUtils.sinon.stub( global, 'window', {\n *\t\t\tinnerWidth: 10000\n *\t\t} );\n *\n *\t\tconsole.log( global.window.innerWidth );\n */\nexport default { window, document };\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/indexof\n */\n\n/**\n * Returns index of the node in the parent element.\n *\n * @param {Node} node Node which index is tested.\n * @returns {Number} Index of the node in the parent element. Returns 0 if node has no parent.\n */\nexport default function indexOf( node ) {\n\tlet index = 0;\n\n\twhile ( node.previousSibling ) {\n\t\tnode = node.previousSibling;\n\t\tindex++;\n\t}\n\n\treturn index;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module utils/dom/getancestors\n */\n\n/**\n * Returns all ancestors of given DOM node, starting from the top-most (root). Includes the given node itself. If the\n * node is a part of `DocumentFragment` that `DocumentFragment` will be returned. In contrary, if the node is\n * appended to a `Document`, that `Document` will not be returned (algorithms operating on DOM tree care for `Document#documentElement`\n * at most, which will be returned).\n *\n * @param {Node} node DOM node.\n * @returns {Array.<Node|DocumentFragment>} Array of given `node` parents.\n */\nexport default function getAncestors( node ) {\n\tconst nodes = [];\n\n\t// We are interested in `Node`s `DocumentFragment`s only.\n\twhile ( node && node.nodeType != Node.DOCUMENT_NODE ) {\n\t\tnodes.unshift( node );\n\t\tnode = node.parentNode;\n\t}\n\n\treturn nodes;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/domconverter\n */\n\n/* globals document, Node, NodeFilter, Text */\n\nimport ViewText from './text';\nimport ViewElement from './element';\nimport ViewPosition from './position';\nimport ViewRange from './range';\nimport ViewSelection from './selection';\nimport ViewDocumentFragment from './documentfragment';\nimport ViewTreeWalker from './treewalker';\nimport { BR_FILLER, getDataWithoutFiller, INLINE_FILLER_LENGTH, isInlineFiller, NBSP_FILLER, startsWithFiller } from './filler';\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport indexOf from '@ckeditor/ckeditor5-utils/src/dom/indexof';\nimport getAncestors from '@ckeditor/ckeditor5-utils/src/dom/getancestors';\nimport getCommonAncestor from '@ckeditor/ckeditor5-utils/src/dom/getcommonancestor';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport { isElement } from 'lodash-es';\n\n// eslint-disable-next-line new-cap\nconst BR_FILLER_REF = BR_FILLER( document );\n\n/**\n * DomConverter is a set of tools to do transformations between DOM nodes and view nodes. It also handles\n * {@link module:engine/view/domconverter~DomConverter#bindElements binding} these nodes.\n *\n * The instance of DOMConverter is available in {@link module:engine/view/view~View#domConverter `editor.editing.view.domConverter`}.\n *\n * DomConverter does not check which nodes should be rendered (use {@link module:engine/view/renderer~Renderer}), does not keep a\n * state of a tree nor keeps synchronization between tree view and DOM tree (use {@link module:engine/view/document~Document}).\n *\n * DomConverter keeps DOM elements to View element bindings, so when the converter will be destroyed, the binding will\n * be lost. Two converters will keep separate binding maps, so one tree view can be bound with two DOM trees.\n */\nexport default class DomConverter {\n\t/**\n\t * Creates DOM converter.\n\t *\n\t * @param {Object} options Object with configuration options.\n\t * @param {module:engine/view/filler~BlockFillerMode} [options.blockFillerMode='br'] The type of the block filler to use.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The mode of a block filler used by DOM converter.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'br'|'nbsp'} module:engine/view/domconverter~DomConverter#blockFillerMode\n\t\t */\n\t\tthis.blockFillerMode = options.blockFillerMode || 'br';\n\n\t\t/**\n\t\t * Elements which are considered pre-formatted elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>} module:engine/view/domconverter~DomConverter#preElements\n\t\t */\n\t\tthis.preElements = [ 'pre' ];\n\n\t\t/**\n\t\t * Elements which are considered block elements (and hence should be filled with a\n\t\t * {@link #isBlockFiller block filler}).\n\t\t *\n\t\t * Whether an element is considered a block element also affects handling of trailing whitespaces.\n\t\t *\n\t\t * You can extend this array if you introduce support for block elements which are not yet recognized here.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>} module:engine/view/domconverter~DomConverter#blockElements\n\t\t */\n\t\tthis.blockElements = [ 'p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'li', 'dd', 'dt', 'figcaption' ];\n\n\t\t/**\n\t\t * Block {@link module:engine/view/filler filler} creator, which is used to create all block fillers during the\n\t\t * view to DOM conversion and to recognize block fillers during the DOM to view conversion.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Function} module:engine/view/domconverter~DomConverter#_blockFiller\n\t\t */\n\t\tthis._blockFiller = this.blockFillerMode == 'br' ? BR_FILLER : NBSP_FILLER;\n\n\t\t/**\n\t\t * DOM to View mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_domToViewMapping\n\t\t */\n\t\tthis._domToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * View to DOM mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_viewToDomMapping\n\t\t */\n\t\tthis._viewToDomMapping = new WeakMap();\n\n\t\t/**\n\t\t * Holds mapping between fake selection containers and corresponding view selections.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_fakeSelectionMapping\n\t\t */\n\t\tthis._fakeSelectionMapping = new WeakMap();\n\t}\n\n\t/**\n\t * Binds given DOM element that represents fake selection to a **position** of a\n\t * {@link module:engine/view/documentselection~DocumentSelection document selection}.\n\t * Document selection copy is stored and can be retrieved by\n\t * {@link module:engine/view/domconverter~DomConverter#fakeSelectionToView} method.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @param {module:engine/view/documentselection~DocumentSelection} viewDocumentSelection\n\t */\n\tbindFakeSelection( domElement, viewDocumentSelection ) {\n\t\tthis._fakeSelectionMapping.set( domElement, new ViewSelection( viewDocumentSelection ) );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/view/selection~Selection view selection} instance corresponding to\n\t * given DOM element that represents fake selection. Returns `undefined` if binding to given DOM element does not exists.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @returns {module:engine/view/selection~Selection|undefined}\n\t */\n\tfakeSelectionToView( domElement ) {\n\t\treturn this._fakeSelectionMapping.get( domElement );\n\t}\n\n\t/**\n\t * Binds DOM and View elements, so it will be possible to get corresponding elements using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {HTMLElement} domElement DOM element to bind.\n\t * @param {module:engine/view/element~Element} viewElement View element to bind.\n\t */\n\tbindElements( domElement, viewElement ) {\n\t\tthis._domToViewMapping.set( domElement, viewElement );\n\t\tthis._viewToDomMapping.set( viewElement, domElement );\n\t}\n\n\t/**\n\t * Unbinds given `domElement` from the view element it was bound to. Unbinding is deep, meaning that all children of\n\t * `domElement` will be unbound too.\n\t *\n\t * @param {HTMLElement} domElement DOM element to unbind.\n\t */\n\tunbindDomElement( domElement ) {\n\t\tconst viewElement = this._domToViewMapping.get( domElement );\n\n\t\tif ( viewElement ) {\n\t\t\tthis._domToViewMapping.delete( domElement );\n\t\t\tthis._viewToDomMapping.delete( viewElement );\n\n\t\t\t// Use Array.from because of MS Edge (#923).\n\t\t\tfor ( const child of Array.from( domElement.childNodes ) ) {\n\t\t\t\tthis.unbindDomElement( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Binds DOM and View document fragments, so it will be possible to get corresponding document fragments using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {DocumentFragment} domFragment DOM document fragment to bind.\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment View document fragment to bind.\n\t */\n\tbindDocumentFragments( domFragment, viewFragment ) {\n\t\tthis._domToViewMapping.set( domFragment, viewFragment );\n\t\tthis._viewToDomMapping.set( viewFragment, domFragment );\n\t}\n\n\t/**\n\t * Converts view to DOM. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View node or document fragment to transform.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @returns {Node|DocumentFragment} Converted node or DocumentFragment.\n\t */\n\tviewToDom( viewNode, domDocument, options = {} ) {\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tconst textData = this._processDataFromViewText( viewNode );\n\n\t\t\treturn domDocument.createTextNode( textData );\n\t\t} else {\n\t\t\tif ( this.mapViewToDom( viewNode ) ) {\n\t\t\t\treturn this.mapViewToDom( viewNode );\n\t\t\t}\n\n\t\t\tlet domElement;\n\n\t\t\tif ( viewNode.is( 'documentFragment' ) ) {\n\t\t\t\t// Create DOM document fragment.\n\t\t\t\tdomElement = domDocument.createDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domElement, viewNode );\n\t\t\t\t}\n\t\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\t\t// UIElement has its own render() method (see #799).\n\t\t\t\tdomElement = viewNode.render( domDocument );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\treturn domElement;\n\t\t\t} else {\n\t\t\t\t// Create DOM element.\n\t\t\t\tif ( viewNode.hasAttribute( 'xmlns' ) ) {\n\t\t\t\t\tdomElement = domDocument.createElementNS( viewNode.getAttribute( 'xmlns' ), viewNode.name );\n\t\t\t\t} else {\n\t\t\t\t\tdomElement = domDocument.createElement( viewNode.name );\n\t\t\t\t}\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tfor ( const key of viewNode.getAttributeKeys() ) {\n\t\t\t\t\tdomElement.setAttribute( key, viewNode.getAttribute( key ) );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.viewChildrenToDom( viewNode, domDocument, options ) ) {\n\t\t\t\t\tdomElement.appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn domElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the view element to DOM using the\n\t * {@link module:engine/view/domconverter~DomConverter#viewToDom} method.\n\t * Additionally, this method adds block {@link module:engine/view/filler filler} to the list of children, if needed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElement Parent view element.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#viewToDom} options parameter.\n\t * @returns {Iterable.<Node>} DOM nodes.\n\t */\n\t* viewChildrenToDom( viewElement, domDocument, options = {} ) {\n\t\tconst fillerPositionOffset = viewElement.getFillerOffset && viewElement.getFillerOffset();\n\t\tlet offset = 0;\n\n\t\tfor ( const childView of viewElement.getChildren() ) {\n\t\t\tif ( fillerPositionOffset === offset ) {\n\t\t\t\tyield this._blockFiller( domDocument );\n\t\t\t}\n\n\t\t\tyield this.viewToDom( childView, domDocument, options );\n\n\t\t\toffset++;\n\t\t}\n\n\t\tif ( fillerPositionOffset === offset ) {\n\t\t\tyield this._blockFiller( domDocument );\n\t\t}\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/range~Range} to DOM range.\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {Range} DOM range.\n\t */\n\tviewRangeToDom( viewRange ) {\n\t\tconst domStart = this.viewPositionToDom( viewRange.start );\n\t\tconst domEnd = this.viewPositionToDom( viewRange.end );\n\n\t\tconst domRange = document.createRange();\n\t\tdomRange.setStart( domStart.parent, domStart.offset );\n\t\tdomRange.setEnd( domEnd.parent, domEnd.offset );\n\n\t\treturn domRange;\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/position~Position} to DOM parent and offset.\n\t *\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t * If the converted position is directly before inline filler it is moved inside the filler.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {Object|null} position DOM position or `null` if view position could not be converted to DOM.\n\t * @returns {Node} position.parent DOM position parent.\n\t * @returns {Number} position.offset DOM position offset.\n\t */\n\tviewPositionToDom( viewPosition ) {\n\t\tconst viewParent = viewPosition.parent;\n\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\tconst domParent = this.findCorrespondingDomText( viewParent );\n\n\t\t\tif ( !domParent ) {\n\t\t\t\t// Position is in a view text node that has not been rendered to DOM yet.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tlet offset = viewPosition.offset;\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset += INLINE_FILLER_LENGTH;\n\t\t\t}\n\n\t\t\treturn { parent: domParent, offset };\n\t\t} else {\n\t\t\t// viewParent is instance of ViewElement.\n\t\t\tlet domParent, domBefore, domAfter;\n\n\t\t\tif ( viewPosition.offset === 0 ) {\n\t\t\t\tdomParent = this.mapViewToDom( viewParent );\n\n\t\t\t\tif ( !domParent ) {\n\t\t\t\t\t// Position is in a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomAfter = domParent.childNodes[ 0 ];\n\t\t\t} else {\n\t\t\t\tconst nodeBefore = viewPosition.nodeBefore;\n\n\t\t\t\tdomBefore = nodeBefore.is( 'text' ) ?\n\t\t\t\t\tthis.findCorrespondingDomText( nodeBefore ) :\n\t\t\t\t\tthis.mapViewToDom( viewPosition.nodeBefore );\n\n\t\t\t\tif ( !domBefore ) {\n\t\t\t\t\t// Position is after a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomParent = domBefore.parentNode;\n\t\t\t\tdomAfter = domBefore.nextSibling;\n\t\t\t}\n\n\t\t\t// If there is an inline filler at position return position inside the filler. We should never return\n\t\t\t// the position before the inline filler.\n\t\t\tif ( isText( domAfter ) && startsWithFiller( domAfter ) ) {\n\t\t\t\treturn { parent: domAfter, offset: INLINE_FILLER_LENGTH };\n\t\t\t}\n\n\t\t\tconst offset = domBefore ? indexOf( domBefore ) + 1 : 0;\n\n\t\t\treturn { parent: domParent, offset };\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM to view. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items. For\n\t * {@link module:engine/view/filler fillers} `null` will be returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {Node|DocumentFragment} domNode DOM node or document fragment to transform.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @param {Boolean} [options.keepOriginalCase=false] If `false`, node's tag name will be converter to lower case.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} Converted node or document fragment\n\t * or `null` if DOM node is a {@link module:engine/view/filler filler} or the given node is an empty text node.\n\t */\n\tdomToView( domNode, options = {} ) {\n\t\tif ( this.isBlockFiller( domNode, this.blockFillerMode ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When node is inside UIElement return that UIElement as it's view representation.\n\t\tconst uiElement = this.getParentUIElement( domNode, this._domToViewMapping );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tif ( isText( domNode ) ) {\n\t\t\tif ( isInlineFiller( domNode ) ) {\n\t\t\t\treturn null;\n\t\t\t} else {\n\t\t\t\tconst textData = this._processDataFromDomText( domNode );\n\n\t\t\t\treturn textData === '' ? null : new ViewText( textData );\n\t\t\t}\n\t\t} else if ( this.isComment( domNode ) ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\tif ( this.mapDomToView( domNode ) ) {\n\t\t\t\treturn this.mapDomToView( domNode );\n\t\t\t}\n\n\t\t\tlet viewElement;\n\n\t\t\tif ( this.isDocumentFragment( domNode ) ) {\n\t\t\t\t// Create view document fragment.\n\t\t\t\tviewElement = new ViewDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domNode, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Create view element.\n\t\t\t\tconst viewName = options.keepOriginalCase ? domNode.tagName : domNode.tagName.toLowerCase();\n\t\t\t\tviewElement = new ViewElement( viewName );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domNode, viewElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tconst attrs = domNode.attributes;\n\n\t\t\t\tfor ( let i = attrs.length - 1; i >= 0; i-- ) {\n\t\t\t\t\tviewElement._setAttribute( attrs[ i ].name, attrs[ i ].value );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.domChildrenToView( domNode, options ) ) {\n\t\t\t\t\tviewElement._appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn viewElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the DOM element to view nodes using\n\t * the {@link module:engine/view/domconverter~DomConverter#domToView} method.\n\t * Additionally this method omits block {@link module:engine/view/filler filler}, if it exists in the DOM parent.\n\t *\n\t * @param {HTMLElement} domElement Parent DOM element.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#domToView} options parameter.\n\t * @returns {Iterable.<module:engine/view/node~Node>} View nodes.\n\t */\n\t* domChildrenToView( domElement, options = {} ) {\n\t\tfor ( let i = 0; i < domElement.childNodes.length; i++ ) {\n\t\t\tconst domChild = domElement.childNodes[ i ];\n\t\t\tconst viewChild = this.domToView( domChild, options );\n\n\t\t\tif ( viewChild !== null ) {\n\t\t\t\tyield viewChild;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM selection to view {@link module:engine/view/selection~Selection}.\n\t * Ranges which cannot be converted will be omitted.\n\t *\n\t * @param {Selection} domSelection DOM selection.\n\t * @returns {module:engine/view/selection~Selection} View selection.\n\t */\n\tdomSelectionToView( domSelection ) {\n\t\t// DOM selection might be placed in fake selection container.\n\t\t// If container contains fake selection - return corresponding view selection.\n\t\tif ( domSelection.rangeCount === 1 ) {\n\t\t\tlet container = domSelection.getRangeAt( 0 ).startContainer;\n\n\t\t\t// The DOM selection might be moved to the text node inside the fake selection container.\n\t\t\tif ( isText( container ) ) {\n\t\t\t\tcontainer = container.parentNode;\n\t\t\t}\n\n\t\t\tconst viewSelection = this.fakeSelectionToView( container );\n\n\t\t\tif ( viewSelection ) {\n\t\t\t\treturn viewSelection;\n\t\t\t}\n\t\t}\n\n\t\tconst isBackward = this.isDomSelectionBackward( domSelection );\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( let i = 0; i < domSelection.rangeCount; i++ ) {\n\t\t\t// DOM Range have correct start and end, no matter what is the DOM Selection direction. So we don't have to fix anything.\n\t\t\tconst domRange = domSelection.getRangeAt( i );\n\t\t\tconst viewRange = this.domRangeToView( domRange );\n\n\t\t\tif ( viewRange ) {\n\t\t\t\tviewRanges.push( viewRange );\n\t\t\t}\n\t\t}\n\n\t\treturn new ViewSelection( viewRanges, { backward: isBackward } );\n\t}\n\n\t/**\n\t * Converts DOM Range to view {@link module:engine/view/range~Range}.\n\t * If the start or end position can not be converted `null` is returned.\n\t *\n\t * @param {Range} domRange DOM range.\n\t * @returns {module:engine/view/range~Range|null} View range.\n\t */\n\tdomRangeToView( domRange ) {\n\t\tconst viewStart = this.domPositionToView( domRange.startContainer, domRange.startOffset );\n\t\tconst viewEnd = this.domPositionToView( domRange.endContainer, domRange.endOffset );\n\n\t\tif ( viewStart && viewEnd ) {\n\t\t\treturn new ViewRange( viewStart, viewEnd );\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Converts DOM parent and offset to view {@link module:engine/view/position~Position}.\n\t *\n\t * If the position is inside a {@link module:engine/view/filler filler} which has no corresponding view node,\n\t * position of the filler will be converted and returned.\n\t *\n\t * If the position is inside DOM element rendered by {@link module:engine/view/uielement~UIElement}\n\t * that position will be converted to view position before that UIElement.\n\t *\n\t * If structures are too different and it is not possible to find corresponding position then `null` will be returned.\n\t *\n\t * @param {Node} domParent DOM position parent.\n\t * @param {Number} domOffset DOM position offset.\n\t * @returns {module:engine/view/position~Position} viewPosition View position.\n\t */\n\tdomPositionToView( domParent, domOffset ) {\n\t\tif ( this.isBlockFiller( domParent, this.blockFillerMode ) ) {\n\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t}\n\n\t\t// If position is somewhere inside UIElement - return position before that element.\n\t\tconst viewElement = this.mapDomToView( domParent );\n\n\t\tif ( viewElement && viewElement.is( 'uiElement' ) ) {\n\t\t\treturn ViewPosition._createBefore( viewElement );\n\t\t}\n\n\t\tif ( isText( domParent ) ) {\n\t\t\tif ( isInlineFiller( domParent ) ) {\n\t\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t\t}\n\n\t\t\tconst viewParent = this.findCorrespondingViewText( domParent );\n\t\t\tlet offset = domOffset;\n\n\t\t\tif ( !viewParent ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset -= INLINE_FILLER_LENGTH;\n\t\t\t\toffset = offset < 0 ? 0 : offset;\n\t\t\t}\n\n\t\t\treturn new ViewPosition( viewParent, offset );\n\t\t}\n\t\t// domParent instanceof HTMLElement.\n\t\telse {\n\t\t\tif ( domOffset === 0 ) {\n\t\t\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t\t\tif ( viewParent ) {\n\t\t\t\t\treturn new ViewPosition( viewParent, 0 );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst domBefore = domParent.childNodes[ domOffset - 1 ];\n\t\t\t\tconst viewBefore = isText( domBefore ) ?\n\t\t\t\t\tthis.findCorrespondingViewText( domBefore ) :\n\t\t\t\t\tthis.mapDomToView( domBefore );\n\n\t\t\t\t// TODO #663\n\t\t\t\tif ( viewBefore && viewBefore.parent ) {\n\t\t\t\t\treturn new ViewPosition( viewBefore.parent, viewBefore.index + 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Returns corresponding view {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment} for provided DOM element or\n\t * document fragment. If there is no view item {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * to the given DOM - `undefined` is returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {DocumentFragment|Element} domElementOrDocumentFragment DOM element or document fragment.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|undefined}\n\t * Corresponding view element, document fragment or `undefined` if no element was bound.\n\t */\n\tmapDomToView( domElementOrDocumentFragment ) {\n\t\treturn this.getParentUIElement( domElementOrDocumentFragment ) || this._domToViewMapping.get( domElementOrDocumentFragment );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * For all text nodes rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * Note that for the block or inline {@link module:engine/view/filler filler} this method returns `null`.\n\t *\n\t * @param {Text} domText DOM text node.\n\t * @returns {module:engine/view/text~Text|null} Corresponding view text node or `null`, if it was not possible to find a\n\t * corresponding node.\n\t */\n\tfindCorrespondingViewText( domText ) {\n\t\tif ( isInlineFiller( domText ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// If DOM text was rendered by UIElement - return that element.\n\t\tconst uiElement = this.getParentUIElement( domText );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tconst previousSibling = domText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling ) {\n\t\t\tif ( !( this.isElement( previousSibling ) ) ) {\n\t\t\t\t// The previous is text or comment.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewElement = this.mapDomToView( previousSibling );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst nextSibling = viewElement.nextSibling;\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( nextSibling instanceof ViewText ) {\n\t\t\t\t\treturn viewElement.nextSibling;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t// Try to use parent to find the corresponding text node.\n\t\telse {\n\t\t\tconst viewElement = this.mapDomToView( domText.parentNode );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst firstChild = viewElement.getChild( 0 );\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( firstChild instanceof ViewText ) {\n\t\t\t\t\treturn firstChild;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns corresponding DOM item for provided {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment}.\n\t * To find a corresponding text for {@link module:engine/view/text~Text view Text instance}\n\t * use {@link #findCorrespondingDomText}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View element or document fragment.\n\t * @returns {Node|DocumentFragment|undefined} Corresponding DOM node or document fragment.\n\t */\n\tmapViewToDom( documentFragmentOrElement ) {\n\t\treturn this._viewToDomMapping.get( documentFragmentOrElement );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} viewText View text node.\n\t * @returns {Text|null} Corresponding DOM text node or `null`, if it was not possible to find a corresponding node.\n\t */\n\tfindCorrespondingDomText( viewText ) {\n\t\tconst previousSibling = viewText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling && this.mapViewToDom( previousSibling ) ) {\n\t\t\treturn this.mapViewToDom( previousSibling ).nextSibling;\n\t\t}\n\n\t\t// If this is a first node, try to use parent to find the corresponding text node.\n\t\tif ( !previousSibling && viewText.parent && this.mapViewToDom( viewText.parent ) ) {\n\t\t\treturn this.mapViewToDom( viewText.parent ).childNodes[ 0 ];\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Focuses DOM editable that is corresponding to provided {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t * @param {module:engine/view/editableelement~EditableElement} viewEditable\n\t */\n\tfocus( viewEditable ) {\n\t\tconst domEditable = this.mapViewToDom( viewEditable );\n\n\t\tif ( domEditable && domEditable.ownerDocument.activeElement !== domEditable ) {\n\t\t\t// Save the scrollX and scrollY positions before the focus.\n\t\t\tconst { scrollX, scrollY } = global.window;\n\t\t\tconst scrollPositions = [];\n\n\t\t\t// Save all scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst { scrollLeft, scrollTop } = node;\n\n\t\t\t\tscrollPositions.push( [ scrollLeft, scrollTop ] );\n\t\t\t} );\n\n\t\t\tdomEditable.focus();\n\n\t\t\t// Restore scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/957\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst [ scrollLeft, scrollTop ] = scrollPositions.shift();\n\n\t\t\t\tnode.scrollLeft = scrollLeft;\n\t\t\t\tnode.scrollTop = scrollTop;\n\t\t\t} );\n\n\t\t\t// Restore the scrollX and scrollY positions after the focus.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\tglobal.window.scrollTo( scrollX, scrollY );\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.ELEMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisElement( node ) {\n\t\treturn node && node.nodeType == Node.ELEMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.DOCUMENT_FRAGMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisDocumentFragment( node ) {\n\t\treturn node && node.nodeType == Node.DOCUMENT_FRAGMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.COMMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisComment( node ) {\n\t\treturn node && node.nodeType == Node.COMMENT_NODE;\n\t}\n\n\t/**\n\t * Checks if the node is an instance of the block filler for this DOM converter.\n\t *\n\t *\t\tconst converter = new DomConverter( { blockFillerMode: 'br' } );\n\t *\n\t *\t\tconverter.isBlockFiller( BR_FILLER( document ) ); // true\n\t *\t\tconverter.isBlockFiller( NBSP_FILLER( document ) ); // false\n\t *\n\t * **Note:**: For the `'nbsp'` mode the method also checks context of a node so it cannot be a detached node.\n\t *\n\t * **Note:** A special case in the `'nbsp'` mode exists where the `<br>` in `<p><br></p>` is treated as a block filler.\n\t *\n\t * @param {Node} domNode DOM node to check.\n\t * @returns {Boolean} True if a node is considered a block filler for given mode.\n\t */\n\tisBlockFiller( domNode ) {\n\t\tif ( this.blockFillerMode == 'br' ) {\n\t\t\treturn domNode.isEqualNode( BR_FILLER_REF );\n\t\t}\n\n\t\t// Special case for <p><br></p> in which case the <br> should be treated as filler even\n\t\t// when we're in the 'nbsp' mode. See ckeditor5#5564.\n\t\tif ( domNode.tagName === 'BR' && hasBlockParent( domNode, this.blockElements ) && domNode.parentNode.childNodes.length === 1 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn isNbspBlockFiller( domNode, this.blockElements );\n\t}\n\n\t/**\n\t * Returns `true` if given selection is a backward selection, that is, if it's `focus` is before `anchor`.\n\t *\n\t * @param {Selection} DOM Selection instance to check.\n\t * @returns {Boolean}\n\t */\n\tisDomSelectionBackward( selection ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Since it takes multiple lines of code to check whether a \"DOM Position\" is before/after another \"DOM Position\",\n\t\t// we will use the fact that range will collapse if it's end is before it's start.\n\t\tconst range = document.createRange();\n\n\t\trange.setStart( selection.anchorNode, selection.anchorOffset );\n\t\trange.setEnd( selection.focusNode, selection.focusOffset );\n\n\t\tconst backward = range.collapsed;\n\n\t\trange.detach();\n\n\t\treturn backward;\n\t}\n\n\t/**\n\t * Returns parent {@link module:engine/view/uielement~UIElement} for provided DOM node. Returns `null` if there is no\n\t * parent UIElement.\n\t *\n\t * @param {Node} domNode\n\t * @returns {module:engine/view/uielement~UIElement|null}\n\t */\n\tgetParentUIElement( domNode ) {\n\t\tconst ancestors = getAncestors( domNode );\n\n\t\t// Remove domNode from the list.\n\t\tancestors.pop();\n\n\t\twhile ( ancestors.length ) {\n\t\t\tconst domNode = ancestors.pop();\n\t\t\tconst viewNode = this._domToViewMapping.get( domNode );\n\n\t\t\tif ( viewNode && viewNode.is( 'uiElement' ) ) {\n\t\t\t\treturn viewNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks if given selection's boundaries are at correct places.\n\t *\n\t * The following places are considered as incorrect for selection boundaries:\n\t * * before or in the middle of the inline filler sequence,\n\t * * inside the DOM element which represents {@link module:engine/view/uielement~UIElement a view ui element}.\n\t *\n\t * @param {Selection} domSelection DOM Selection object to be checked.\n\t * @returns {Boolean} `true` if the given selection is at a correct place, `false` otherwise.\n\t */\n\tisDomSelectionCorrect( domSelection ) {\n\t\treturn this._isDomSelectionPositionCorrect( domSelection.anchorNode, domSelection.anchorOffset ) &&\n\t\t\tthis._isDomSelectionPositionCorrect( domSelection.focusNode, domSelection.focusOffset );\n\t}\n\n\t/**\n\t * Checks if the given DOM position is a correct place for selection boundary. See {@link #isDomSelectionCorrect}.\n\t *\n\t * @private\n\t * @param {Element} domParent Position parent.\n\t * @param {Number} offset Position offset.\n\t * @returns {Boolean} `true` if given position is at a correct place for selection boundary, `false` otherwise.\n\t */\n\t_isDomSelectionPositionCorrect( domParent, offset ) {\n\t\t// If selection is before or in the middle of inline filler string, it is incorrect.\n\t\tif ( isText( domParent ) && startsWithFiller( domParent ) && offset < INLINE_FILLER_LENGTH ) {\n\t\t\t// Selection in a text node, at wrong position (before or in the middle of filler).\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isElement( domParent ) && startsWithFiller( domParent.childNodes[ offset ] ) ) {\n\t\t\t// Selection in an element node, before filler text node.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t// If selection is in `view.UIElement`, it is incorrect. Note that `mapDomToView()` returns `view.UIElement`\n\t\t// also for any dom element that is inside the view ui element (so we don't need to perform any additional checks).\n\t\tif ( viewParent && viewParent.is( 'uiElement' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Takes text data from a given {@link module:engine/view/text~Text#data} and processes it so\n\t * it is correctly displayed in the DOM.\n\t *\n\t * Following changes are done:\n\t *\n\t * * a space at the beginning is changed to ` ` if this is the first text node in its container\n\t * element or if a previous text node ends with a space character,\n\t * * space at the end of the text node is changed to ` ` if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container,\n\t * * remaining spaces are replaced to a chain of spaces and ` ` (e.g. `'x x'` becomes `'x   x'`).\n\t *\n\t * Content of {@link #preElements} is not processed.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node View text node to process.\n\t * @returns {String} Processed text data.\n\t */\n\t_processDataFromViewText( node ) {\n\t\tlet data = node.data;\n\n\t\t// If any of node ancestors has a name which is in `preElements` array, then currently processed\n\t\t// view text node is (will be) in preformatted element. We should not change whitespaces then.\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn data;\n\t\t}\n\n\t\t// 1. Replace the first space with a nbsp if the previous node ends with a space or there is no previous node\n\t\t// (container element boundary).\n\t\tif ( data.charAt( 0 ) == ' ' ) {\n\t\t\tconst prevNode = this._getTouchingViewTextNode( node, false );\n\t\t\tconst prevEndsWithSpace = prevNode && this._nodeEndsWithSpace( prevNode );\n\n\t\t\tif ( prevEndsWithSpace || !prevNode ) {\n\t\t\t\tdata = '\\u00A0' + data.substr( 1 );\n\t\t\t}\n\t\t}\n\n\t\t// 2. Replace the last space with nbsp if there are two spaces at the end or if the next node starts with space or there is no\n\t\t// next node (container element boundary).\n\t\t//\n\t\t// Keep in mind that Firefox prefers $nbsp; before tag, not inside it:\n\t\t//\n\t\t// Foo <span> bar</span> <-- bad.\n\t\t// Foo <span> bar</span> <-- good.\n\t\t//\n\t\t// More here: https://github.com/ckeditor/ckeditor5-engine/issues/1747.\n\t\tif ( data.charAt( data.length - 1 ) == ' ' ) {\n\t\t\tconst nextNode = this._getTouchingViewTextNode( node, true );\n\n\t\t\tif ( data.charAt( data.length - 2 ) == ' ' || !nextNode || nextNode.data.charAt( 0 ) == ' ' ) {\n\t\t\t\tdata = data.substr( 0, data.length - 1 ) + '\\u00A0';\n\t\t\t}\n\t\t}\n\n\t\t// 3. Create space+nbsp pairs.\n\t\treturn data.replace( / {2}/g, ' \\u00A0' );\n\t}\n\n\t/**\n\t * Checks whether given node ends with a space character after changing appropriate space characters to ` `s.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node Node to check.\n\t * @returns {Boolean} `true` if given `node` ends with space, `false` otherwise.\n\t */\n\t_nodeEndsWithSpace( node ) {\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst data = this._processDataFromViewText( node );\n\n\t\treturn data.charAt( data.length - 1 ) == ' ';\n\t}\n\n\t/**\n\t * Takes text data from native `Text` node and processes it to a correct {@link module:engine/view/text~Text view text node} data.\n\t *\n\t * Following changes are done:\n\t *\n\t * * multiple whitespaces are replaced to a single space,\n\t * * space at the beginning of a text node is removed if it is the first text node in its container\n\t * element or if the previous text node ends with a space character,\n\t * * space at the end of the text node is removed if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container\n\t * * nbsps are converted to spaces.\n\t *\n\t * @param {Node} node DOM text node to process.\n\t * @returns {String} Processed data.\n\t * @private\n\t */\n\t_processDataFromDomText( node ) {\n\t\tlet data = node.data;\n\n\t\tif ( _hasDomParentOfType( node, this.preElements ) ) {\n\t\t\treturn getDataWithoutFiller( node );\n\t\t}\n\n\t\t// Change all consecutive whitespace characters (from the [ \\n\\t\\r] set –\n\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/822#issuecomment-311670249) to a single space character.\n\t\t// That's how multiple whitespaces are treated when rendered, so we normalize those whitespaces.\n\t\t// We're replacing 1+ (and not 2+) to also normalize singular \\n\\t\\r characters (#822).\n\t\tdata = data.replace( /[ \\n\\t\\r]{1,}/g, ' ' );\n\n\t\tconst prevNode = this._getTouchingInlineDomNode( node, false );\n\t\tconst nextNode = this._getTouchingInlineDomNode( node, true );\n\n\t\tconst shouldLeftTrim = this._checkShouldLeftTrimDomText( prevNode );\n\t\tconst shouldRightTrim = this._checkShouldRightTrimDomText( node, nextNode );\n\n\t\t// If the previous dom text node does not exist or it ends by whitespace character, remove space character from the beginning\n\t\t// of this text node. Such space character is treated as a whitespace.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^ /, '' );\n\t\t}\n\n\t\t// If the next text node does not exist remove space character from the end of this text node.\n\t\tif ( shouldRightTrim ) {\n\t\t\tdata = data.replace( / $/, '' );\n\t\t}\n\n\t\t// At the beginning and end of a block element, Firefox inserts normal space + <br> instead of non-breaking space.\n\t\t// This means that the text node starts/end with normal space instead of non-breaking space.\n\t\t// This causes a problem because the normal space would be removed in `.replace` calls above. To prevent that,\n\t\t// the inline filler is removed only after the data is initially processed (by the `.replace` above). See ckeditor5#692.\n\t\tdata = getDataWithoutFiller( new Text( data ) );\n\n\t\t// At this point we should have removed all whitespaces from DOM text data.\n\t\t//\n\t\t// Now, We will reverse the process that happens in `_processDataFromViewText`.\n\t\t//\n\t\t// We have to change   chars, that were in DOM text data because of rendering reasons, to spaces.\n\t\t// First, change all ` \\u00A0` pairs (space +  ) to two spaces. DOM converter changes two spaces from model/view to\n\t\t// ` \\u00A0` to ensure proper rendering. Since here we convert back, we recognize those pairs and change them back to ` `.\n\t\tdata = data.replace( / \\u00A0/g, ' ' );\n\n\t\t// Then, let's change the last nbsp to a space.\n\t\tif ( /( |\\u00A0)\\u00A0$/.test( data ) || !nextNode || ( nextNode.data && nextNode.data.charAt( 0 ) == ' ' ) ) {\n\t\t\tdata = data.replace( /\\u00A0$/, ' ' );\n\t\t}\n\n\t\t// Then, change   character that is at the beginning of the text node to space character.\n\t\t// We do that replacement only if this is the first node or the previous node ends on whitespace character.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^\\u00A0/, ' ' );\n\t\t}\n\n\t\t// At this point, all whitespaces should be removed and all   created for rendering reasons should be\n\t\t// changed to normal space. All left   are   inserted intentionally.\n\t\treturn data;\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, preceded by the given `prevNode` should\n\t * be trimmed from the left side.\n\t *\n\t * @param {Node} prevNode\n\t */\n\t_checkShouldLeftTrimDomText( prevNode ) {\n\t\tif ( !prevNode ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( isElement( prevNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn /[^\\S\\u00A0]/.test( prevNode.data.charAt( prevNode.data.length - 1 ) );\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, succeeded by the given `nextNode` should\n\t * be trimmed from the right side.\n\t *\n\t * @param {Node} node\n\t * @param {Node} nextNode\n\t */\n\t_checkShouldRightTrimDomText( node, nextNode ) {\n\t\tif ( nextNode ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !startsWithFiller( node );\n\t}\n\n\t/**\n\t * Helper function. For given {@link module:engine/view/text~Text view text node}, it finds previous or next sibling\n\t * that is contained in the same container element. If there is no such sibling, `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} node Reference node.\n\t * @param {Boolean} getNext\n\t * @returns {module:engine/view/text~Text|null} Touching text node or `null` if there is no next or previous touching text node.\n\t */\n\t_getTouchingViewTextNode( node, getNext ) {\n\t\tconst treeWalker = new ViewTreeWalker( {\n\t\t\tstartPosition: getNext ? ViewPosition._createAfter( node ) : ViewPosition._createBefore( node ),\n\t\t\tdirection: getNext ? 'forward' : 'backward'\n\t\t} );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\t// ViewContainerElement is found on a way to next ViewText node, so given `node` was first/last\n\t\t\t// text node in its container element.\n\t\t\tif ( value.item.is( 'containerElement' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// <br> found – it works like a block boundary, so do not scan further.\n\t\t\telse if ( value.item.is( 'br' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// Found a text node in the same container element.\n\t\t\telse if ( value.item.is( 'textProxy' ) ) {\n\t\t\t\treturn value.item;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Helper function. For the given text node, it finds the closest touching node which is either\n\t * a text node or a `<br>`. The search is terminated at block element boundaries and if a matching node\n\t * wasn't found so far, `null` is returned.\n\t *\n\t * In the following DOM structure:\n\t *\n\t *\t\t<p>foo<b>bar</b><br>bom</p>\n\t *\n\t * * `foo` doesn't have its previous touching inline node (`null` is returned),\n\t * * `foo`'s next touching inline node is `bar`\n\t * * `bar`'s next touching inline node is `<br>`\n\t *\n\t * This method returns text nodes and `<br>` elements because these types of nodes affect how\n\t * spaces in the given text node need to be converted.\n\t *\n\t * @private\n\t * @param {Text} node\n\t * @param {Boolean} getNext\n\t * @returns {Text|Element|null}\n\t */\n\t_getTouchingInlineDomNode( node, getNext ) {\n\t\tif ( !node.parentNode ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst direction = getNext ? 'nextNode' : 'previousNode';\n\t\tconst document = node.ownerDocument;\n\t\tconst topmostParent = getAncestors( node )[ 0 ];\n\n\t\tconst treeWalker = document.createTreeWalker( topmostParent, NodeFilter.SHOW_TEXT | NodeFilter.SHOW_ELEMENT, {\n\t\t\tacceptNode( node ) {\n\t\t\t\tif ( isText( node ) ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\tif ( node.tagName == 'BR' ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\treturn NodeFilter.FILTER_SKIP;\n\t\t\t}\n\t\t} );\n\n\t\ttreeWalker.currentNode = node;\n\n\t\tconst touchingNode = treeWalker[ direction ]();\n\n\t\tif ( touchingNode !== null ) {\n\t\t\tconst lca = getCommonAncestor( node, touchingNode );\n\n\t\t\t// If there is common ancestor between the text node and next/prev text node,\n\t\t\t// and there are no block elements on a way from the text node to that ancestor,\n\t\t\t// and there are no block elements on a way from next/prev text node to that ancestor...\n\t\t\tif (\n\t\t\t\tlca &&\n\t\t\t\t!_hasDomParentOfType( node, this.blockElements, lca ) &&\n\t\t\t\t!_hasDomParentOfType( touchingNode, this.blockElements, lca )\n\t\t\t) {\n\t\t\t\t// Then they are in the same container element.\n\t\t\t\treturn touchingNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n// Helper function.\n// Used to check if given native `Element` or `Text` node has parent with tag name from `types` array.\n//\n// @param {Node} node\n// @param {Array.<String>} types\n// @param {Boolean} [boundaryParent] Can be given if parents should be checked up to a given element (excluding that element).\n// @returns {Boolean} `true` if such parent exists or `false` if it does not.\nfunction _hasDomParentOfType( node, types, boundaryParent ) {\n\tlet parents = getAncestors( node );\n\n\tif ( boundaryParent ) {\n\t\tparents = parents.slice( parents.indexOf( boundaryParent ) + 1 );\n\t}\n\n\treturn parents.some( parent => parent.tagName && types.includes( parent.tagName.toLowerCase() ) );\n}\n\n// A helper that executes given callback for each DOM node's ancestor, starting from the given node\n// and ending in document#documentElement.\n//\n// @param {Node} node\n// @param {Function} callback A callback to be executed for each ancestor.\nfunction forEachDomNodeAncestor( node, callback ) {\n\twhile ( node && node != global.document ) {\n\t\tcallback( node );\n\t\tnode = node.parentNode;\n\t}\n}\n\n// Checks if given node is a nbsp block filler.\n//\n// A   is a block filler only if it is a single child of a block element.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction isNbspBlockFiller( domNode, blockElements ) {\n\tconst isNBSP = isText( domNode ) && domNode.data == '\\u00A0';\n\n\treturn isNBSP && hasBlockParent( domNode, blockElements ) && domNode.parentNode.childNodes.length === 1;\n}\n\n// Checks if domNode has block parent.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction hasBlockParent( domNode, blockElements ) {\n\tconst parent = domNode.parentNode;\n\n\treturn parent && parent.tagName && blockElements.includes( parent.tagName.toLowerCase() );\n}\n\n/**\n * Enum representing type of the block filler.\n *\n * Possible values:\n *\n * * `br` - for `<br>` block filler used in editing view,\n * * `nbsp` - for ` ` block fillers used in the data.\n *\n * @typedef {String} module:engine/view/filler~BlockFillerMode\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getcommonancestor\n */\n\nimport getAncestors from './getancestors';\n\n/**\n * Searches and returns the lowest common ancestor of two given nodes.\n *\n * @param {Node} nodeA First node.\n * @param {Node} nodeB Second node.\n * @returns {Node|DocumentFragment|Document|null} Lowest common ancestor of both nodes or `null` if nodes do not have a common ancestor.\n */\nexport default function getCommonAncestor( nodeA, nodeB ) {\n\tconst ancestorsA = getAncestors( nodeA );\n\tconst ancestorsB = getAncestors( nodeB );\n\n\tlet i = 0;\n\n\t// It does not matter which array is shorter.\n\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\ti++;\n\t}\n\n\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/iswindow\n */\n\n/**\n * Checks if the object is a native DOM Window.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isWindow( obj ) {\n\tconst stringifiedObject = Object.prototype.toString.apply( obj );\n\n\t// Returns `true` for the `window` object in browser environments.\n\tif ( stringifiedObject == '[object Window]' ) {\n\t\treturn true;\n\t}\n\n\t// Returns `true` for the `window` object in the Electron environment.\n\tif ( stringifiedObject == '[object global]' ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/emittermixin\n */\n\nimport { default as EmitterMixin, _getEmitterListenedTo, _setEmitterId } from '../emittermixin';\nimport uid from '../uid';\nimport isNode from './isnode';\nimport isWindow from './iswindow';\nimport { extend } from 'lodash-es';\n\n/**\n * Mixin that injects the DOM events API into its host. It provides the API\n * compatible with {@link module:utils/emittermixin~EmitterMixin}.\n *\n * DOM emitter mixin is by default available in the {@link module:ui/view~View} class,\n * but it can also be mixed into any other class:\n *\n *\t\timport mix from '../utils/mix.js';\n *\t\timport DomEmitterMixin from '../utils/dom/emittermixin.js';\n *\n *\t\tclass SomeView {}\n *\t\tmix( SomeView, DomEmitterMixin );\n *\n *\t\tconst view = new SomeView();\n *\t\tview.listenTo( domElement, ( evt, domEvt ) => {\n *\t\t\tconsole.log( evt, domEvt );\n *\t\t} );\n *\n * @mixin EmitterMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n */\nconst DomEmitterMixin = extend( {}, EmitterMixin, {\n\t/**\n\t * Registers a callback function to be executed when an event is fired in a specific Emitter or DOM Node.\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} emitter The object that fires the event.\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tlistenTo( emitter, ...rest ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with\n\t\t// corresponding ProxyEmitter (or create one if not existing).\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter ) || new ProxyEmitter( emitter );\n\n\t\t\tproxy.attach( ...rest );\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.listenTo.call( this, emitter, ...rest );\n\t},\n\n\t/**\n\t * Stops listening for events. It can be used at different levels:\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * * To stop listening to a specific callback.\n\t * * To stop listening to a specific event.\n\t * * To stop listening to all events fired by a specific object.\n\t * * To stop listening to all events fired by all object.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n\t * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n\t * for all events from `emitter`.\n\t * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n\t * `event`.\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with corresponding ProxyEmitter.\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter );\n\n\t\t\t// Element has no listeners.\n\t\t\tif ( !proxy ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.stopListening.call( this, emitter, event, callback );\n\n\t\tif ( emitter instanceof ProxyEmitter ) {\n\t\t\temitter.detach( event );\n\t\t}\n\t},\n\n\t/**\n\t * Retrieves ProxyEmitter instance for given DOM Node residing in this Host.\n\t *\n\t * @pivate\n\t * @param {Node} node DOM Node of the ProxyEmitter.\n\t * @returns {module:utils/dom/emittermixin~ProxyEmitter} ProxyEmitter instance or null.\n\t */\n\t_getProxyEmitter( node ) {\n\t\treturn _getEmitterListenedTo( this, getNodeUID( node ) );\n\t}\n} );\n\nexport default DomEmitterMixin;\n\n/**\n * Creates a ProxyEmitter instance. Such an instance is a bridge between a DOM Node firing events\n * and any Host listening to them. It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#on}.\n *\n * listenTo( click, ... )\n * +-----------------------------------------+\n * | stopListening( ... ) |\n * +----------------------------+ | addEventListener( click, ... )\n * | Host | | +---------------------------------------------+\n * +----------------------------+ | | removeEventListener( click, ... ) |\n * | _listeningTo: { | +----------v-------------+ |\n * | UID: { | | ProxyEmitter | |\n * | emitter: ProxyEmitter, | +------------------------+ +------------v----------+\n * | callbacks: { | | events: { | | Node (HTMLElement) |\n * | click: [ callbacks ] | | click: [ callbacks ] | +-----------------------+\n * | } | | }, | | data-ck-expando: UID |\n * | } | | _domNode: Node, | +-----------------------+\n * | } | | _domListeners: {}, | |\n * | +------------------------+ | | _emitterId: UID | |\n * | | DomEmitterMixin | | +--------------^---------+ |\n * | +------------------------+ | | | |\n * +--------------^-------------+ | +---------------------------------------------+\n * | | click (DOM Event)\n * +-----------------------------------------+\n * fire( click, DOM Event )\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n * @private\n */\nclass ProxyEmitter {\n\t/**\n\t * @param {Node} node DOM Node that fires events.\n\t * @returns {Object} ProxyEmitter instance bound to the DOM Node.\n\t */\n\tconstructor( node ) {\n\t\t// Set emitter ID to match DOM Node \"expando\" property.\n\t\t_setEmitterId( this, getNodeUID( node ) );\n\n\t\t// Remember the DOM Node this ProxyEmitter is bound to.\n\t\tthis._domNode = node;\n\t}\n}\n\nextend( ProxyEmitter.prototype, EmitterMixin, {\n\t/**\n\t * Collection of native DOM listeners.\n\t *\n\t * @private\n\t * @member {Object} module:utils/dom/emittermixin~ProxyEmitter#_domListeners\n\t */\n\n\t/**\n\t * Registers a callback function to be executed when an event is fired.\n\t *\n\t * It attaches a native DOM listener to the DOM Node. When fired,\n\t * a corresponding Emitter event will also fire with DOM Event object as an argument.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#attach\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tattach( event, callback, options = {} ) {\n\t\t// If the DOM Listener for given event already exist it is pointless\n\t\t// to attach another one.\n\t\tif ( this._domListeners && this._domListeners[ event ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domListener = this._createDomListener( event, !!options.useCapture );\n\n\t\t// Attach the native DOM listener to DOM Node.\n\t\tthis._domNode.addEventListener( event, domListener, !!options.useCapture );\n\n\t\tif ( !this._domListeners ) {\n\t\t\tthis._domListeners = {};\n\t\t}\n\n\t\t// Store the native DOM listener in this ProxyEmitter. It will be helpful\n\t\t// when stopping listening to the event.\n\t\tthis._domListeners[ event ] = domListener;\n\t},\n\n\t/**\n\t * Stops executing the callback on the given event.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#detach\n\t * @param {String} event The name of the event.\n\t */\n\tdetach( event ) {\n\t\tlet events;\n\n\t\t// Remove native DOM listeners which are orphans. If no callbacks\n\t\t// are awaiting given event, detach native DOM listener from DOM Node.\n\t\t// See: {@link attach}.\n\n\t\tif ( this._domListeners[ event ] && ( !( events = this._events[ event ] ) || !events.callbacks.length ) ) {\n\t\t\tthis._domListeners[ event ].removeListener();\n\t\t}\n\t},\n\n\t/**\n\t * Creates a native DOM listener callback. When the native DOM event\n\t * is fired it will fire corresponding event on this ProxyEmitter.\n\t * Note: A native DOM Event is passed as an argument.\n\t *\n\t * @private\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#_createDomListener\n\t * @param {String} event The name of the event.\n\t * @param {Boolean} useCapture Indicates whether the listener was created for capturing event.\n\t * @returns {Function} The DOM listener callback.\n\t */\n\t_createDomListener( event, useCapture ) {\n\t\tconst domListener = domEvt => {\n\t\t\tthis.fire( event, domEvt );\n\t\t};\n\n\t\t// Supply the DOM listener callback with a function that will help\n\t\t// detach it from the DOM Node, when it is no longer necessary.\n\t\t// See: {@link detach}.\n\t\tdomListener.removeListener = () => {\n\t\t\tthis._domNode.removeEventListener( event, domListener, useCapture );\n\t\t\tdelete this._domListeners[ event ];\n\t\t};\n\n\t\treturn domListener;\n\t}\n} );\n\n// Gets an unique DOM Node identifier. The identifier will be set if not defined.\n//\n// @private\n// @param {Node} node\n// @returns {String} UID for given DOM Node.\nfunction getNodeUID( node ) {\n\treturn node[ 'data-ck-expando' ] || ( node[ 'data-ck-expando' ] = uid() );\n}\n\n/**\n * Interface representing classes which mix in {@link module:utils/dom/emittermixin~EmitterMixin}.\n *\n * @interface Emitter\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/observer\n */\n\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Abstract base observer class. Observers are classes which listen to DOM events, do the preliminary\n * processing and fire events on the {@link module:engine/view/document~Document} objects.\n * Observers can also add features to the view, for instance by updating its status or marking elements\n * which need refresh on DOM events.\n *\n * @abstract\n */\nexport default class Observer {\n\t/**\n\t * Creates an instance of the observer.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/document~Document} object.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * State of the observer. If it is disabled events will not be fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Enables the observer. This method is called when the observer is registered to the\n\t * {@link module:engine/view/view~View} and after {@link module:engine/view/view~View#forceRender rendering}\n\t * (all observers are {@link #disable disabled} before rendering).\n\t *\n\t * A typical use case for disabling observers is that mutation observers need to be disabled for the rendering.\n\t * However, a child class may not need to be disabled, so it can implement an empty method.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#disable\n\t */\n\tenable() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the observer. This method is called before\n\t * {@link module:engine/view/view~View#forceRender rendering} to prevent firing events during rendering.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#enable\n\t */\n\tdisable() {\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Disables and destroys the observer, among others removes event listeners created by the observer.\n\t */\n\tdestroy() {\n\t\tthis.disable();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Starts observing the given root element.\n\t *\n\t * @method #observe\n\t * @param {HTMLElement} domElement\n\t * @param {String} name The name of the root element.\n\t */\n}\n\nmix( Observer, DomEmitterMixin );\n","import MapCache from './_MapCache.js';\nimport setCacheAdd from './_setCacheAdd.js';\nimport setCacheHas from './_setCacheHas.js';\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\nexport default SetCache;\n","/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n}\n\nexport default setCacheAdd;\n","/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n return this.__data__.has(value);\n}\n\nexport default setCacheHas;\n","/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\nfunction arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n}\n\nexport default arraySome;\n","/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n return cache.has(key);\n}\n\nexport default cacheHas;\n","import SetCache from './_SetCache.js';\nimport arraySome from './_arraySome.js';\nimport cacheHas from './_cacheHas.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(array);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n}\n\nexport default equalArrays;\n","/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n}\n\nexport default mapToArray;\n","/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n}\n\nexport default setToArray;\n","import Symbol from './_Symbol.js';\nimport Uint8Array from './_Uint8Array.js';\nimport eq from './eq.js';\nimport equalArrays from './_equalArrays.js';\nimport mapToArray from './_mapToArray.js';\nimport setToArray from './_setToArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n}\n\nexport default equalByTag;\n","import getAllKeys from './_getAllKeys.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n}\n\nexport default equalObjects;\n","import Stack from './_Stack.js';\nimport equalArrays from './_equalArrays.js';\nimport equalByTag from './_equalByTag.js';\nimport equalObjects from './_equalObjects.js';\nimport getTag from './_getTag.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\nexport default baseIsEqualDeep;\n","import baseIsEqualDeep from './_baseIsEqualDeep.js';\nimport isObjectLike from './isObjectLike.js';\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\nexport default baseIsEqual;\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\nfunction isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n}\n\nexport default isEqualWith;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mutationobserver\n */\n\n/* globals window */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { startsWithFiller, getDataWithoutFiller } from '../filler';\nimport { isEqualWith } from 'lodash-es';\n\n/**\n * Mutation observer class observes changes in the DOM, fires {@link module:engine/view/document~Document#event:mutations} event, mark view\n * elements as changed and call {@link module:engine/view/renderer~Renderer#render}.\n * Because all mutated nodes are marked as \"to be rendered\" and the\n * {@link module:engine/view/renderer~Renderer#render} is called, all changes will be reverted, unless the mutation will be handled by the\n * {@link module:engine/view/document~Document#event:mutations} event listener. It means user will see only handled changes, and the editor\n * will block all changes which are not handled.\n *\n * Mutation Observer also take care of reducing number of mutations which are fired. It removes duplicates and\n * mutations on elements which do not have corresponding view elements. Also\n * {@link module:engine/view/observer/mutationobserver~MutatedText text mutation} is fired only if parent element do not change child list.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class MutationObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Native mutation observer config.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {\n\t\t\tchildList: true,\n\t\t\tcharacterData: true,\n\t\t\tcharacterDataOldValue: true,\n\t\t\tsubtree: true\n\t\t};\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#_renderer}.\n\t\t *\n\t\t * @member {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis.renderer = view._renderer;\n\n\t\t/**\n\t\t * Observed DOM elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<HTMLElement>}\n\t\t */\n\t\tthis._domElements = [];\n\n\t\t/**\n\t\t * Native mutation observer.\n\t\t *\n\t\t * @private\n\t\t * @member {MutationObserver}\n\t\t */\n\t\tthis._mutationObserver = new window.MutationObserver( this._onMutations.bind( this ) );\n\t}\n\n\t/**\n\t * Synchronously fires {@link module:engine/view/document~Document#event:mutations} event with all mutations in record queue.\n\t * At the same time empties the queue so mutations will not be fired twice.\n\t */\n\tflush() {\n\t\tthis._onMutations( this._mutationObserver.takeRecords() );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tthis._domElements.push( domElement );\n\n\t\tif ( this.isEnabled ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tenable() {\n\t\tsuper.enable();\n\n\t\tfor ( const domElement of this._domElements ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdisable() {\n\t\tsuper.disable();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * Handles mutations. Deduplicates, mark view elements to sync, fire event and call render.\n\t *\n\t * @private\n\t * @param {Array.<Object>} domMutations Array of native mutations.\n\t */\n\t_onMutations( domMutations ) {\n\t\t// As a result of this.flush() we can have an empty collection.\n\t\tif ( domMutations.length === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.domConverter;\n\n\t\t// Use map and set for deduplication.\n\t\tconst mutatedTexts = new Map();\n\t\tconst mutatedElements = new Set();\n\n\t\t// Handle `childList` mutations first, so we will be able to check if the `characterData` mutation is in the\n\t\t// element with changed structure anyway.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tif ( mutation.type === 'childList' ) {\n\t\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t\t// Do not collect mutations from UIElements.\n\t\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif ( element && !this._isBogusBrMutation( mutation ) ) {\n\t\t\t\t\tmutatedElements.add( element );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Handle `characterData` mutations later, when we have the full list of nodes which changed structure.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t// Do not collect mutations from UIElements.\n\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tif ( mutation.type === 'characterData' ) {\n\t\t\t\tconst text = domConverter.findCorrespondingViewText( mutation.target );\n\n\t\t\t\tif ( text && !mutatedElements.has( text.parent ) ) {\n\t\t\t\t\t// Use text as a key, for deduplication. If there will be another mutation on the same text element\n\t\t\t\t\t// we will have only one in the map.\n\t\t\t\t\tmutatedTexts.set( text, {\n\t\t\t\t\t\ttype: 'text',\n\t\t\t\t\t\toldText: text.data,\n\t\t\t\t\t\tnewText: getDataWithoutFiller( mutation.target ),\n\t\t\t\t\t\tnode: text\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t\t// When we added first letter to the text node which had only inline filler, for the DOM it is mutation\n\t\t\t\t// on text, but for the view, where filler text node did not existed, new text node was created, so we\n\t\t\t\t// need to fire 'children' mutation instead of 'text'.\n\t\t\t\telse if ( !text && startsWithFiller( mutation.target ) ) {\n\t\t\t\t\tmutatedElements.add( domConverter.mapDomToView( mutation.target.parentNode ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Now we build the list of mutations to fire and mark elements. We did not do it earlier to avoid marking the\n\t\t// same node multiple times in case of duplication.\n\n\t\t// List of mutations we will fire.\n\t\tconst viewMutations = [];\n\n\t\tfor ( const mutatedText of mutatedTexts.values() ) {\n\t\t\tthis.renderer.markToSync( 'text', mutatedText.node );\n\t\t\tviewMutations.push( mutatedText );\n\t\t}\n\n\t\tfor ( const viewElement of mutatedElements ) {\n\t\t\tconst domElement = domConverter.mapViewToDom( viewElement );\n\t\t\tconst viewChildren = Array.from( viewElement.getChildren() );\n\t\t\tconst newViewChildren = Array.from( domConverter.domChildrenToView( domElement, { withChildren: false } ) );\n\n\t\t\t// It may happen that as a result of many changes (sth was inserted and then removed),\n\t\t\t// both elements haven't really changed. #1031\n\t\t\tif ( !isEqualWith( viewChildren, newViewChildren, sameNodes ) ) {\n\t\t\t\tthis.renderer.markToSync( 'children', viewElement );\n\n\t\t\t\tviewMutations.push( {\n\t\t\t\t\ttype: 'children',\n\t\t\t\t\toldChildren: viewChildren,\n\t\t\t\t\tnewChildren: newViewChildren,\n\t\t\t\t\tnode: viewElement\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\t// Retrieve `domSelection` using `ownerDocument` of one of mutated nodes.\n\t\t// There should not be simultaneous mutation in multiple documents, so it's fine.\n\t\tconst domSelection = domMutations[ 0 ].target.ownerDocument.getSelection();\n\n\t\tlet viewSelection = null;\n\n\t\tif ( domSelection && domSelection.anchorNode ) {\n\t\t\t// If `domSelection` is inside a dom node that is already bound to a view node from view tree, get\n\t\t\t// corresponding selection in the view and pass it together with `viewMutations`. The `viewSelection` may\n\t\t\t// be used by features handling mutations.\n\t\t\t// Only one range is supported.\n\n\t\t\tconst viewSelectionAnchor = domConverter.domPositionToView( domSelection.anchorNode, domSelection.anchorOffset );\n\t\t\tconst viewSelectionFocus = domConverter.domPositionToView( domSelection.focusNode, domSelection.focusOffset );\n\n\t\t\t// Anchor and focus has to be properly mapped to view.\n\t\t\tif ( viewSelectionAnchor && viewSelectionFocus ) {\n\t\t\t\tviewSelection = new ViewSelection( viewSelectionAnchor );\n\t\t\t\tviewSelection.setFocus( viewSelectionFocus );\n\t\t\t}\n\t\t}\n\n\t\tthis.document.fire( 'mutations', viewMutations, viewSelection );\n\n\t\t// If nothing changes on `mutations` event, at this point we have \"dirty DOM\" (changed) and de-synched\n\t\t// view (which has not been changed). In order to \"reset DOM\" we render the view again.\n\t\tthis.view.forceRender();\n\n\t\tfunction sameNodes( child1, child2 ) {\n\t\t\t// First level of comparison (array of children vs array of children) – use the Lodash's default behavior.\n\t\t\tif ( Array.isArray( child1 ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Elements.\n\t\t\tif ( child1 === child2 ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t\t// Texts.\n\t\t\telse if ( child1.is( 'text' ) && child2.is( 'text' ) ) {\n\t\t\t\treturn child1.data === child2.data;\n\t\t\t}\n\n\t\t\t// Not matching types.\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Checks if mutation was generated by the browser inserting bogus br on the end of the block element.\n\t * Such mutations are generated while pressing space or performing native spellchecker correction\n\t * on the end of the block element in Firefox browser.\n\t *\n\t * @private\n\t * @param {Object} mutation Native mutation object.\n\t * @returns {Boolean}\n\t */\n\t_isBogusBrMutation( mutation ) {\n\t\tlet addedNode = null;\n\n\t\t// Check if mutation added only one node on the end of its parent.\n\t\tif ( mutation.nextSibling === null && mutation.removedNodes.length === 0 && mutation.addedNodes.length == 1 ) {\n\t\t\taddedNode = this.domConverter.domToView( mutation.addedNodes[ 0 ], {\n\t\t\t\twithChildren: false\n\t\t\t} );\n\t\t}\n\n\t\treturn addedNode && addedNode.is( 'element', 'br' );\n\t}\n}\n\n/**\n * Fired when mutation occurred. If tree view is not changed on this event, DOM will be reverted to the state before\n * mutation, so all changes which should be applied, should be handled on this event.\n *\n * Introduced by {@link module:engine/view/observer/mutationobserver~MutationObserver}.\n *\n * Note that because {@link module:engine/view/observer/mutationobserver~MutationObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @event module:engine/view/document~Document#event:mutations\n * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|module:engine/view/observer/mutationobserver~MutatedChildren>}\n * viewMutations Array of mutations.\n * For mutated texts it will be {@link module:engine/view/observer/mutationobserver~MutatedText} and for mutated elements it will be\n * {@link module:engine/view/observer/mutationobserver~MutatedChildren}. You can recognize the type based on the `type` property.\n * @param {module:engine/view/selection~Selection|null} viewSelection View selection that is a result of converting DOM selection to view.\n * Keep in\n * mind that the DOM selection is already \"updated\", meaning that it already acknowledges changes done in mutation.\n */\n\n/**\n * Mutation item for text.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedText\n *\n * @property {String} type For text mutations it is always 'text'.\n * @property {module:engine/view/text~Text} node Mutated text node.\n * @property {String} oldText Old text.\n * @property {String} newText New text.\n */\n\n/**\n * Mutation item for child nodes.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedText\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @property {String} type For child nodes mutations it is always 'children'.\n * @property {module:engine/view/element~Element} node Parent of the mutated children.\n * @property {Array.<module:engine/view/node~Node>} oldChildren Old child nodes.\n * @property {Array.<module:engine/view/node~Node>} newChildren New child nodes.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventdata\n */\n\nimport { extend } from 'lodash-es';\n\n/**\n * Information about a DOM event in context of the {@link module:engine/view/document~Document}.\n * It wraps the native event, which usually should not be used as the wrapper contains\n * additional data (like key code for keyboard events).\n */\nexport default class DomEventData {\n\t/**\n\t * @param {module:engine/view/view~View} view The instance of the view controller.\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] Additional properties that the instance should contain.\n\t */\n\tconstructor( view, domEvent, additionalData ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View} module:engine/view/observer/observer~Observer.DomEvent#view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * The instance of the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document} module:engine/view/observer/observer~Observer.DomEvent#document\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * The DOM event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Event} module:engine/view/observer/observer~Observer.DomEvent#domEvent\n\t\t */\n\t\tthis.domEvent = domEvent;\n\n\t\t/**\n\t\t * The DOM target.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} module:engine/view/observer/observer~Observer.DomEvent#target\n\t\t */\n\t\tthis.domTarget = domEvent.target;\n\n\t\textend( this, additionalData );\n\t}\n\n\t/**\n\t * The tree view element representing the target.\n\t *\n\t * @readonly\n\t * @type module:engine/view/element~Element\n\t */\n\tget target() {\n\t\treturn this.view.domConverter.mapDomToView( this.domTarget );\n\t}\n\n\t/**\n\t * Prevents the native's event default action.\n\t */\n\tpreventDefault() {\n\t\tthis.domEvent.preventDefault();\n\t}\n\n\t/**\n\t * Stops native event propagation.\n\t */\n\tstopPropagation() {\n\t\tthis.domEvent.stopPropagation();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventobserver\n */\n\nimport Observer from './observer';\nimport DomEventData from './domeventdata';\n\n/**\n * Base class for DOM event observers. This class handles\n * {@link module:engine/view/observer/observer~Observer#observe adding} listeners to DOM elements,\n * {@link module:engine/view/observer/observer~Observer#disable disabling} and\n * {@link module:engine/view/observer/observer~Observer#enable re-enabling} events.\n * Child class needs to define\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#domEventType DOM event type} and\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#onDomEvent callback}.\n *\n * For instance:\n *\n *\t\tclass ClickObserver extends DomEventObserver {\n *\t\t\t// It can also be defined as a normal property in the constructor.\n *\t\t\tget domEventType() {\n *\t\t\t\treturn 'click';\n *\t\t\t}\n *\n *\t\t\tonDomEvent( domEvent ) {\n *\t\t\t\tthis.fire( 'click', domEvent );\n *\t\t\t}\n *\t\t}\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DomEventObserver extends Observer {\n\t/**\n\t * Type of the DOM event the observer should listen on. Array of types can be defined\n\t * if the obsever should listen to multiple DOM events.\n\t *\n\t * @readonly\n\t * @member {String|Array.<String>} #domEventType\n\t */\n\n\t/**\n\t * Callback which should be called when the DOM event occurred. Note that the callback will not be called if\n\t * observer {@link #isEnabled is not enabled}.\n\t *\n\t * @see #domEventType\n\t * @abstract\n\t * @method #onDomEvent\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * If set to `true` DOM events will be listened on the capturing phase.\n\t\t * Default value is `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.useCapture = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst types = typeof this.domEventType == 'string' ? [ this.domEventType ] : this.domEventType;\n\n\t\ttypes.forEach( type => {\n\t\t\tthis.listenTo( domElement, type, ( eventInfo, domEvent ) => {\n\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\tthis.onDomEvent( domEvent );\n\t\t\t\t}\n\t\t\t}, { useCapture: this.useCapture } );\n\t\t} );\n\t}\n\n\t/**\n\t * Calls `Document#fire()` if observer {@link #isEnabled is enabled}.\n\t *\n\t * @see module:utils/emittermixin~EmitterMixin#fire\n\t * @param {String} eventType The event type (name).\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] The additional data which should extend the\n\t * {@link module:engine/view/observer/domeventdata~DomEventData event data} object.\n\t */\n\tfire( eventType, domEvent, additionalData ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( eventType, new DomEventData( this.view, domEvent, additionalData ) );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/keyobserver\n */\n\nimport DomEventObserver from './domeventobserver';\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Observer for events connected with pressing keyboard keys.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class KeyObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'keydown', 'keyup' ];\n\t}\n\n\tonDomEvent( domEvt ) {\n\t\tthis.fire( domEvt.type, domEvt, {\n\t\t\tkeyCode: domEvt.keyCode,\n\n\t\t\taltKey: domEvt.altKey,\n\t\t\tctrlKey: domEvt.ctrlKey || domEvt.metaKey,\n\t\t\tshiftKey: domEvt.shiftKey,\n\n\t\t\tget keystroke() {\n\t\t\t\treturn getCode( this );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n/**\n * Fired when a key has been pressed.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keydown\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * Fired when a key has been released.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keyup\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * The value of both events - {@link module:engine/view/document~Document#event:keydown} and\n * {@link module:engine/view/document~Document#event:keyup}.\n *\n * @class module:engine/view/observer/keyobserver~KeyEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n * @implements module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * Code of the whole keystroke. See {@link module:utils/keyboard~getCode}.\n *\n * @readonly\n * @member {Number} module:engine/view/observer/keyobserver~KeyEventData#keystroke\n */\n","import root from './_root.js';\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n * console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n return root.Date.now();\n};\n\nexport default now;\n","import baseGetTag from './_baseGetTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n return typeof value == 'symbol' ||\n (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\nexport default isSymbol;\n","import isObject from './isObject.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** Used to match leading and trailing whitespace. */\nvar reTrim = /^\\s+|\\s+$/g;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = value.replace(reTrim, '');\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nexport default toNumber;\n","import isObject from './isObject.js';\nimport now from './now.js';\nimport toNumber from './toNumber.js';\n\n/** Error message constants. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max,\n nativeMin = Math.min;\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n * Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n * The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n * 'leading': true,\n * 'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n var lastArgs,\n lastThis,\n maxWait,\n result,\n timerId,\n lastCallTime,\n lastInvokeTime = 0,\n leading = false,\n maxing = false,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n wait = toNumber(wait) || 0;\n if (isObject(options)) {\n leading = !!options.leading;\n maxing = 'maxWait' in options;\n maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n\n function invokeFunc(time) {\n var args = lastArgs,\n thisArg = lastThis;\n\n lastArgs = lastThis = undefined;\n lastInvokeTime = time;\n result = func.apply(thisArg, args);\n return result;\n }\n\n function leadingEdge(time) {\n // Reset any `maxWait` timer.\n lastInvokeTime = time;\n // Start the timer for the trailing edge.\n timerId = setTimeout(timerExpired, wait);\n // Invoke the leading edge.\n return leading ? invokeFunc(time) : result;\n }\n\n function remainingWait(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime,\n timeWaiting = wait - timeSinceLastCall;\n\n return maxing\n ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n : timeWaiting;\n }\n\n function shouldInvoke(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime;\n\n // Either this is the first call, activity has stopped and we're at the\n // trailing edge, the system time has gone backwards and we're treating\n // it as the trailing edge, or we've hit the `maxWait` limit.\n return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n }\n\n function timerExpired() {\n var time = now();\n if (shouldInvoke(time)) {\n return trailingEdge(time);\n }\n // Restart the timer.\n timerId = setTimeout(timerExpired, remainingWait(time));\n }\n\n function trailingEdge(time) {\n timerId = undefined;\n\n // Only invoke if we have `lastArgs` which means `func` has been\n // debounced at least once.\n if (trailing && lastArgs) {\n return invokeFunc(time);\n }\n lastArgs = lastThis = undefined;\n return result;\n }\n\n function cancel() {\n if (timerId !== undefined) {\n clearTimeout(timerId);\n }\n lastInvokeTime = 0;\n lastArgs = lastCallTime = lastThis = timerId = undefined;\n }\n\n function flush() {\n return timerId === undefined ? result : trailingEdge(now());\n }\n\n function debounced() {\n var time = now(),\n isInvoking = shouldInvoke(time);\n\n lastArgs = arguments;\n lastThis = this;\n lastCallTime = time;\n\n if (isInvoking) {\n if (timerId === undefined) {\n return leadingEdge(lastCallTime);\n }\n if (maxing) {\n // Handle invocations in a tight loop.\n clearTimeout(timerId);\n timerId = setTimeout(timerExpired, wait);\n return invokeFunc(lastCallTime);\n }\n }\n if (timerId === undefined) {\n timerId = setTimeout(timerExpired, wait);\n }\n return result;\n }\n debounced.cancel = cancel;\n debounced.flush = flush;\n return debounced;\n}\n\nexport default debounce;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/fakeselectionobserver\n */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport { debounce } from 'lodash-es';\n\n/**\n * Fake selection observer class. If view selection is fake it is placed in dummy DOM container. This observer listens\n * on {@link module:engine/view/document~Document#event:keydown keydown} events and handles moving fake view selection to the correct place\n * if arrow keys are pressed.\n * Fires {@link module:engine/view/document~Document#event:selectionChange selectionChange event} simulating natural behaviour of\n * {@link module:engine/view/observer/selectionobserver~SelectionObserver SelectionObserver}.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class FakeSelectionObserver extends Observer {\n\t/**\n\t * Creates new FakeSelectionObserver instance.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'keydown', ( eventInfo, data ) => {\n\t\t\tconst selection = document.selection;\n\n\t\t\tif ( selection.isFake && _isArrowKeyCode( data.keyCode ) && this.isEnabled ) {\n\t\t\t\t// Prevents default key down handling - no selection change will occur.\n\t\t\t\tdata.preventDefault();\n\n\t\t\t\tthis._handleSelectionMove( data.keyCode );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Handles collapsing view selection according to given key code. If left or up key is provided - new selection will be\n\t * collapsed to left. If right or down key is pressed - new selection will be collapsed to right.\n\t *\n\t * This method fires {@link module:engine/view/document~Document#event:selectionChange} and\n\t * {@link module:engine/view/document~Document#event:selectionChangeDone} events imitating behaviour of\n\t * {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n\t *\n\t * @private\n\t * @param {Number} keyCode\n\t * @fires module:engine/view/document~Document#event:selectionChange\n\t * @fires module:engine/view/document~Document#event:selectionChangeDone\n\t */\n\t_handleSelectionMove( keyCode ) {\n\t\tconst selection = this.document.selection;\n\t\tconst newSelection = new ViewSelection( selection.getRanges(), { backward: selection.isBackward, fake: false } );\n\n\t\t// Left or up arrow pressed - move selection to start.\n\t\tif ( keyCode == keyCodes.arrowleft || keyCode == keyCodes.arrowup ) {\n\t\t\tnewSelection.setTo( newSelection.getFirstPosition() );\n\t\t}\n\n\t\t// Right or down arrow pressed - move selection to end.\n\t\tif ( keyCode == keyCodes.arrowright || keyCode == keyCodes.arrowdown ) {\n\t\t\tnewSelection.setTo( newSelection.getLastPosition() );\n\t\t}\n\n\t\tconst data = {\n\t\t\toldSelection: selection,\n\t\t\tnewSelection,\n\t\t\tdomSelection: null\n\t\t};\n\n\t\t// Fire dummy selection change event.\n\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t}\n}\n\n// Checks if one of the arrow keys is pressed.\n//\n// @private\n// @param {Number} keyCode\n// @returns {Boolean}\nfunction _isArrowKeyCode( keyCode ) {\n\treturn keyCode == keyCodes.arrowright ||\n\t\tkeyCode == keyCodes.arrowleft ||\n\t\tkeyCode == keyCodes.arrowup ||\n\t\tkeyCode == keyCodes.arrowdown;\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/selectionobserver\n */\n\n/* global setInterval, clearInterval */\n\nimport Observer from './observer';\nimport MutationObserver from './mutationobserver';\nimport { debounce } from 'lodash-es';\n\n/**\n * Selection observer class observes selection changes in the document. If selection changes on the document this\n * observer checks if there are any mutations and if DOM selection is different than the\n * {@link module:engine/view/document~Document#selection view selection}. Selection observer fires\n * {@link module:engine/view/document~Document#event:selectionChange} event only if selection change was the only change in the document\n * and DOM selection is different then the view selection.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class SelectionObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Instance of the mutation observer. Selection observer calls\n\t\t * {@link module:engine/view/observer/mutationobserver~MutationObserver#flush} to ensure that the mutations will be handled\n\t\t * before the {@link module:engine/view/document~Document#event:selectionChange} event is fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/observer/mutationobserver~MutationObserver}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#mutationObserver\n\t\t */\n\t\tthis.mutationObserver = view.getObserver( MutationObserver );\n\n\t\t/**\n\t\t * Reference to the view {@link module:engine/view/documentselection~DocumentSelection} object used to compare\n\t\t * new selection with it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#selection\n\t\t */\n\t\tthis.selection = this.document.selection;\n\n\t\t/* eslint-disable max-len */\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter} module:engine/view/observer/selectionobserver~SelectionObserver#domConverter\n\t\t */\n\t\t/* eslint-enable max-len */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Set of documents which have added \"selectionchange\" listener to avoid adding listener twice to the same\n\t\t * document.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.<Document>} module:engine/view/observer/selectionobserver~SelectionObserver#_documents\n\t\t */\n\t\tthis._documents = new WeakSet();\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\n\t\tthis._clearInfiniteLoopInterval = setInterval( () => this._clearInfiniteLoop(), 1000 );\n\n\t\t/**\n\t\t * Private property to check if the code does not enter infinite loop.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} module:engine/view/observer/selectionobserver~SelectionObserver#_loopbackCounter\n\t\t */\n\t\tthis._loopbackCounter = 0;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst domDocument = domElement.ownerDocument;\n\n\t\t// Add listener once per each document.\n\t\tif ( this._documents.has( domDocument ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.listenTo( domDocument, 'selectionchange', () => {\n\t\t\tthis._handleSelectionChange( domDocument );\n\t\t} );\n\n\t\tthis._documents.add( domDocument );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tclearInterval( this._clearInfiniteLoopInterval );\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Selection change listener. {@link module:engine/view/observer/mutationobserver~MutationObserver#flush Flush} mutations, check if\n\t * selection changes and fires {@link module:engine/view/document~Document#event:selectionChange} event on every change\n\t * and {@link module:engine/view/document~Document#event:selectionChangeDone} when selection stop changing.\n\t *\n\t * @private\n\t * @param {Document} domDocument DOM document.\n\t */\n\t_handleSelectionChange( domDocument ) {\n\t\t// Selection is handled when document is not focused but is read-only. This is because in read-only\n\t\t// mode contenteditable is set as false and editor won't receive focus but we still need to know\n\t\t// selection position.\n\t\tif ( !this.isEnabled || ( !this.document.isFocused && !this.document.isReadOnly ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure the mutation event will be before selection event on all browsers.\n\t\tthis.mutationObserver.flush();\n\n\t\t// If there were mutations then the view will be re-rendered by the mutation observer and selection\n\t\t// will be updated, so selections will equal and event will not be fired, as expected.\n\t\tconst domSelection = domDocument.defaultView.getSelection();\n\t\tconst newViewSelection = this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( this.selection.isEqual( newViewSelection ) && this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure we are not in the infinite loop (#400).\n\t\t// This counter is reset each second. 60 selection changes in 1 second is enough high number\n\t\t// to be very difficult (impossible) to achieve using just keyboard keys (during normal editor use).\n\t\tif ( ++this._loopbackCounter > 60 ) {\n\t\t\t// Selection change observer detected an infinite rendering loop.\n\t\t\t// Most probably you try to put the selection in the position which is not allowed\n\t\t\t// by the browser and browser fixes it automatically what causes `selectionchange` event on\n\t\t\t// which a loopback through a model tries to re-render the wrong selection and again.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Selection change observer detected an infinite rendering loop.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this.selection.isSimilar( newViewSelection ) ) {\n\t\t\t// If selection was equal and we are at this point of algorithm, it means that it was incorrect.\n\t\t\t// Just re-render it, no need to fire any events, etc.\n\t\t\tthis.view.forceRender();\n\t\t} else {\n\t\t\tconst data = {\n\t\t\t\toldSelection: this.selection,\n\t\t\t\tnewSelection: newViewSelection,\n\t\t\t\tdomSelection\n\t\t\t};\n\n\t\t\t// Prepare data for new selection and fire appropriate events.\n\t\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t\t}\n\t}\n\n\t/**\n\t * Clears `SelectionObserver` internal properties connected with preventing infinite loop.\n\t *\n\t * @protected\n\t */\n\t_clearInfiniteLoop() {\n\t\tthis._loopbackCounter = 0;\n\t}\n}\n\n/**\n * Fired when selection has changed. This event is fired only when the selection change was the only change that happened\n * in the document, and old selection is different then the new selection.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChange\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n\n/**\n * Fired when selection stops changing.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChangeDone\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/focusobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:focus Focus}\n * and {@link module:engine/view/document~Document#event:blur blur} events observer.\n * Focus observer handle also {@link module:engine/view/rooteditableelement~RootEditableElement#isFocused isFocused} property of the\n * {@link module:engine/view/rooteditableelement~RootEditableElement root elements}.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class FocusObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'focus', 'blur' ];\n\t\tthis.useCapture = true;\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'focus', () => {\n\t\t\tdocument.isFocused = true;\n\n\t\t\t// Unfortunately native `selectionchange` event is fired asynchronously.\n\t\t\t// We need to wait until `SelectionObserver` handle the event and then render. Otherwise rendering will\n\t\t\t// overwrite new DOM selection with selection from the view.\n\t\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/795 for more details.\n\t\t\t// Long timeout is needed to solve #676 and https://github.com/ckeditor/ckeditor5-engine/issues/1157 issues.\n\t\t\tthis._renderTimeoutId = setTimeout( () => view.forceRender(), 50 );\n\t\t} );\n\n\t\tdocument.on( 'blur', ( evt, data ) => {\n\t\t\tconst selectedEditable = document.selection.editableElement;\n\n\t\t\tif ( selectedEditable === null || selectedEditable === data.target ) {\n\t\t\t\tdocument.isFocused = false;\n\n\t\t\t\t// Re-render the document to update view elements.\n\t\t\t\tview.forceRender();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Identifier of the timeout currently used by focus listener to delay rendering execution.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_renderTimeoutId\n\t\t */\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._renderTimeoutId ) {\n\t\t\tclearTimeout( this._renderTimeoutId );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n}\n\n/**\n * Fired when one of the editables gets focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:focus\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when one of the editables loses focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:blur\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/compositionobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:compositionstart Compositionstart},\n * {@link module:engine/view/document~Document#event:compositionupdate compositionupdate} and\n * {@link module:engine/view/document~Document#event:compositionend compositionend} events observer.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class CompositionObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'compositionstart', 'compositionupdate', 'compositionend' ];\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'compositionstart', () => {\n\t\t\tdocument.isComposing = true;\n\t\t} );\n\n\t\tdocument.on( 'compositionend', () => {\n\t\t\tdocument.isComposing = false;\n\t\t} );\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when composition starts inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionstart\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition is updated inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionupdate\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition ends inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionend\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/observer/inputobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Observer for events connected with data input.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class InputObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'beforeinput' ];\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired before browser inputs (or deletes) some data.\n *\n * This event is available only on browsers which support DOM `beforeinput` event.\n *\n * Introduced by {@link module:engine/view/observer/inputobserver~InputObserver}.\n *\n * Note that because {@link module:engine/view/observer/inputobserver~InputObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/inputobserver~InputObserver\n * @event module:engine/view/document~Document#event:beforeinput\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isrange\n */\n\n/**\n * Checks if the object is a native DOM Range.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isRange( obj ) {\n\treturn Object.prototype.toString.apply( obj ) == '[object Range]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getborderwidths\n */\n\n/**\n * Returns an object containing CSS border widths of a specified HTML element.\n *\n * @param {HTMLElement} element An element which has CSS borders.\n * @returns {Object} An object containing `top`, `left`, `right` and `bottom` properties\n * with numerical values of the `border-[top,left,right,bottom]-width` CSS styles.\n */\nexport default function getBorderWidths( element ) {\n\t// Call getComputedStyle on the window the element document belongs to.\n\tconst style = element.ownerDocument.defaultView.getComputedStyle( element );\n\n\treturn {\n\t\ttop: parseInt( style.borderTopWidth, 10 ),\n\t\tright: parseInt( style.borderRightWidth, 10 ),\n\t\tbottom: parseInt( style.borderBottomWidth, 10 ),\n\t\tleft: parseInt( style.borderLeftWidth, 10 )\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/rect\n */\n\nimport isRange from './isrange';\nimport isWindow from './iswindow';\nimport getBorderWidths from './getborderwidths';\nimport isText from './istext';\nimport { isElement } from 'lodash-es';\n\nconst rectProperties = [ 'top', 'right', 'bottom', 'left', 'width', 'height' ];\n\n/**\n * A helper class representing a `ClientRect` object, e.g. value returned by\n * the native `object.getBoundingClientRect()` method. Provides a set of methods\n * to manipulate the rect and compare it against other rect instances.\n */\nexport default class Rect {\n\t/**\n\t * Creates an instance of rect.\n\t *\n\t *\t\t// Rect of an HTMLElement.\n\t *\t\tconst rectA = new Rect( document.body );\n\t *\n\t *\t\t// Rect of a DOM Range.\n\t *\t\tconst rectB = new Rect( document.getSelection().getRangeAt( 0 ) );\n\t *\n\t *\t\t// Rect of a window (web browser viewport).\n\t *\t\tconst rectC = new Rect( window );\n\t *\n\t *\t\t// Rect out of an object.\n\t *\t\tconst rectD = new Rect( { top: 0, right: 10, bottom: 10, left: 0, width: 10, height: 10 } );\n\t *\n\t *\t\t// Rect out of another Rect instance.\n\t *\t\tconst rectE = new Rect( rectD );\n\t *\n\t *\t\t// Rect out of a ClientRect.\n\t *\t\tconst rectF = new Rect( document.body.getClientRects().item( 0 ) );\n\t *\n\t * **Note**: By default a rect of an HTML element includes its CSS borders and scrollbars (if any)\n\t * ant the rect of a `window` includes scrollbars too. Use {@link #excludeScrollbarsAndBorders}\n\t * to get the inner part of the rect.\n\t *\n\t * @param {HTMLElement|Range|Window|ClientRect|module:utils/dom/rect~Rect|Object} source A source object to create the rect.\n\t */\n\tconstructor( source ) {\n\t\tconst isSourceRange = isRange( source );\n\n\t\t/**\n\t\t * The object this rect is for.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {HTMLElement|Range|ClientRect|module:utils/dom/rect~Rect|Object} #_source\n\t\t */\n\t\tObject.defineProperty( this, '_source', {\n\t\t\t// If the source is a Rect instance, copy it's #_source.\n\t\t\tvalue: source._source || source,\n\t\t\twritable: true,\n\t\t\tenumerable: false\n\t\t} );\n\n\t\tif ( isElement( source ) || isSourceRange ) {\n\t\t\t// The `Rect` class depends on `getBoundingClientRect` and `getClientRects` DOM methods. If the source\n\t\t\t// of a rect in an HTML element or a DOM range but it does not belong to any rendered DOM tree, these methods\n\t\t\t// will fail to obtain the geometry and the rect instance makes little sense to the features using it.\n\t\t\t// To get rid of this warning make sure the source passed to the constructor is a descendant of `window.document.body`.\n\t\t\t// @if CK_DEBUG // const sourceNode = isSourceRange ? source.startContainer : source;\n\t\t\t// @if CK_DEBUG // if ( !sourceNode.ownerDocument || !sourceNode.ownerDocument.body.contains( sourceNode ) ) {\n\t\t\t// @if CK_DEBUG // \tconsole.warn(\n\t\t\t// @if CK_DEBUG // \t\t'rect-source-not-in-dom: The source of this rect does not belong to any rendered DOM tree.',\n\t\t\t// @if CK_DEBUG // \t\t{ source } );\n\t\t\t// @if CK_DEBUG // }\n\n\t\t\tif ( isSourceRange ) {\n\t\t\t\tcopyRectProperties( this, Rect.getDomRangeRects( source )[ 0 ] );\n\t\t\t} else {\n\t\t\t\tcopyRectProperties( this, source.getBoundingClientRect() );\n\t\t\t}\n\t\t} else if ( isWindow( source ) ) {\n\t\t\tconst { innerWidth, innerHeight } = source;\n\n\t\t\tcopyRectProperties( this, {\n\t\t\t\ttop: 0,\n\t\t\t\tright: innerWidth,\n\t\t\t\tbottom: innerHeight,\n\t\t\t\tleft: 0,\n\t\t\t\twidth: innerWidth,\n\t\t\t\theight: innerHeight\n\t\t\t} );\n\t\t} else {\n\t\t\tcopyRectProperties( this, source );\n\t\t}\n\n\t\t/**\n\t\t * The \"top\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #top\n\t\t */\n\n\t\t/**\n\t\t * The \"right\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #right\n\t\t */\n\n\t\t/**\n\t\t * The \"bottom\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #bottom\n\t\t */\n\n\t\t/**\n\t\t * The \"left\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #left\n\t\t */\n\n\t\t/**\n\t\t * The \"width\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #width\n\t\t */\n\n\t\t/**\n\t\t * The \"height\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #height\n\t\t */\n\t}\n\n\t/**\n\t * Returns a clone of the rect.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A cloned rect.\n\t */\n\tclone() {\n\t\treturn new Rect( this );\n\t}\n\n\t/**\n\t * Moves the rect so that its upper–left corner lands in desired `[ x, y ]` location.\n\t *\n\t * @param {Number} x Desired horizontal location.\n\t * @param {Number} y Desired vertical location.\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveTo( x, y ) {\n\t\tthis.top = y;\n\t\tthis.right = x + this.width;\n\t\tthis.bottom = y + this.height;\n\t\tthis.left = x;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves the rect in–place by a dedicated offset.\n\t *\n\t * @param {Number} x A horizontal offset.\n\t * @param {Number} y A vertical offset\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveBy( x, y ) {\n\t\tthis.top += y;\n\t\tthis.right += x;\n\t\tthis.left += x;\n\t\tthis.bottom += y;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns a new rect a a result of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {module:utils/dom/rect~Rect}\n\t */\n\tgetIntersection( anotherRect ) {\n\t\tconst rect = {\n\t\t\ttop: Math.max( this.top, anotherRect.top ),\n\t\t\tright: Math.min( this.right, anotherRect.right ),\n\t\t\tbottom: Math.min( this.bottom, anotherRect.bottom ),\n\t\t\tleft: Math.max( this.left, anotherRect.left )\n\t\t};\n\n\t\trect.width = rect.right - rect.left;\n\t\trect.height = rect.bottom - rect.top;\n\n\t\tif ( rect.width < 0 || rect.height < 0 ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\treturn new Rect( rect );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect [description]\n\t * @returns {Number} Area of intersection.\n\t */\n\tgetIntersectionArea( anotherRect ) {\n\t\tconst rect = this.getIntersection( anotherRect );\n\n\t\tif ( rect ) {\n\t\t\treturn rect.getArea();\n\t\t} else {\n\t\t\treturn 0;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of the rect.\n\t *\n\t * @returns {Number}\n\t */\n\tgetArea() {\n\t\treturn this.width * this.height;\n\t}\n\n\t/**\n\t * Returns a new rect, a part of the original rect, which is actually visible to the user,\n\t * e.g. an original rect cropped by parent element rects which have `overflow` set in CSS\n\t * other than `\"visible\"`.\n\t *\n\t * If there's no such visible rect, which is when the rect is limited by one or many of\n\t * the ancestors, `null` is returned.\n\t *\n\t * @returns {module:utils/dom/rect~Rect|null} A visible rect instance or `null`, if there's none.\n\t */\n\tgetVisible() {\n\t\tconst source = this._source;\n\t\tlet visibleRect = this.clone();\n\n\t\t// There's no ancestor to crop <body> with the overflow.\n\t\tif ( !isBody( source ) ) {\n\t\t\tlet parent = source.parentNode || source.commonAncestorContainer;\n\n\t\t\t// Check the ancestors all the way up to the <body>.\n\t\t\twhile ( parent && !isBody( parent ) ) {\n\t\t\t\tconst parentRect = new Rect( parent );\n\t\t\t\tconst intersectionRect = visibleRect.getIntersection( parentRect );\n\n\t\t\t\tif ( intersectionRect ) {\n\t\t\t\t\tif ( intersectionRect.getArea() < visibleRect.getArea() ) {\n\t\t\t\t\t\t// Reduce the visible rect to the intersection.\n\t\t\t\t\t\tvisibleRect = intersectionRect;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// There's no intersection, the rect is completely invisible.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tparent = parent.parentNode;\n\t\t\t}\n\t\t}\n\n\t\treturn visibleRect;\n\t}\n\n\t/**\n\t * Checks if all property values ({@link #top}, {@link #left}, {@link #right},\n\t * {@link #bottom}, {@link #width} and {@link #height}) are the equal in both rect\n\t * instances.\n\t *\n\t * @param {module:utils/dom/rect~Rect} rect A rect instance to compare with.\n\t * @returns {Boolean} `true` when Rects are equal. `false` otherwise.\n\t */\n\tisEqual( anotherRect ) {\n\t\tfor ( const prop of rectProperties ) {\n\t\t\tif ( this[ prop ] !== anotherRect[ prop ] ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether a rect fully contains another rect instance.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {Boolean} `true` if contains, `false` otherwise.\n\t */\n\tcontains( anotherRect ) {\n\t\tconst intersectRect = this.getIntersection( anotherRect );\n\n\t\treturn !!( intersectRect && intersectRect.isEqual( anotherRect ) );\n\t}\n\n\t/**\n\t * Excludes scrollbars and CSS borders from the rect.\n\t *\n\t * * Borders are removed when {@link #_source} is an HTML element.\n\t * * Scrollbars are excluded from HTML elements and the `window`.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been updated.\n\t */\n\texcludeScrollbarsAndBorders() {\n\t\tconst source = this._source;\n\t\tlet scrollBarWidth, scrollBarHeight, direction;\n\n\t\tif ( isWindow( source ) ) {\n\t\t\tscrollBarWidth = source.innerWidth - source.document.documentElement.clientWidth;\n\t\t\tscrollBarHeight = source.innerHeight - source.document.documentElement.clientHeight;\n\t\t\tdirection = source.getComputedStyle( source.document.documentElement ).direction;\n\t\t} else {\n\t\t\tconst borderWidths = getBorderWidths( this._source );\n\n\t\t\tscrollBarWidth = source.offsetWidth - source.clientWidth - borderWidths.left - borderWidths.right;\n\t\t\tscrollBarHeight = source.offsetHeight - source.clientHeight - borderWidths.top - borderWidths.bottom;\n\t\t\tdirection = source.ownerDocument.defaultView.getComputedStyle( source ).direction;\n\n\t\t\tthis.left += borderWidths.left;\n\t\t\tthis.top += borderWidths.top;\n\t\t\tthis.right -= borderWidths.right;\n\t\t\tthis.bottom -= borderWidths.bottom;\n\t\t\tthis.width = this.right - this.left;\n\t\t\tthis.height = this.bottom - this.top;\n\t\t}\n\n\t\tthis.width -= scrollBarWidth;\n\n\t\tif ( direction === 'ltr' ) {\n\t\t\tthis.right -= scrollBarWidth;\n\t\t} else {\n\t\t\tthis.left += scrollBarWidth;\n\t\t}\n\n\t\tthis.height -= scrollBarHeight;\n\t\tthis.bottom -= scrollBarHeight;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns an array of rects of the given native DOM Range.\n\t *\n\t * @param {Range} range A native DOM range.\n\t * @returns {Array.<module:utils/dom/rect~Rect>} DOM Range rects.\n\t */\n\tstatic getDomRangeRects( range ) {\n\t\tconst rects = [];\n\t\t// Safari does not iterate over ClientRectList using for...of loop.\n\t\tconst clientRects = Array.from( range.getClientRects() );\n\n\t\tif ( clientRects.length ) {\n\t\t\tfor ( const rect of clientRects ) {\n\t\t\t\trects.push( new Rect( rect ) );\n\t\t\t}\n\t\t}\n\t\t// If there's no client rects for the Range, use parent container's bounding rect\n\t\t// instead and adjust rect's width to simulate the actual geometry of such range.\n\t\t// https://github.com/ckeditor/ckeditor5-utils/issues/153\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/317\n\t\telse {\n\t\t\tlet startContainer = range.startContainer;\n\n\t\t\tif ( isText( startContainer ) ) {\n\t\t\t\tstartContainer = startContainer.parentNode;\n\t\t\t}\n\n\t\t\tconst rect = new Rect( startContainer.getBoundingClientRect() );\n\t\t\trect.right = rect.left;\n\t\t\trect.width = 0;\n\n\t\t\trects.push( rect );\n\t\t}\n\n\t\treturn rects;\n\t}\n}\n\n// Acquires all the rect properties from the passed source.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} rect\n// @param {ClientRect|module:utils/dom/rect~Rect|Object} source\nfunction copyRectProperties( rect, source ) {\n\tfor ( const p of rectProperties ) {\n\t\trect[ p ] = source[ p ];\n\t}\n}\n\n// Checks if provided object is a <body> HTML element.\n//\n// @private\n// @param {HTMLElement|Range} elementOrRange\n// @returns {Boolean}\nfunction isBody( elementOrRange ) {\n\tif ( !isElement( elementOrRange ) ) {\n\t\treturn false;\n\t}\n\n\treturn elementOrRange === elementOrRange.ownerDocument.body;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/scroll\n */\n\nimport isRange from './isrange';\nimport Rect from './rect';\nimport isText from './istext';\n\nconst utils = {};\n\n/**\n * Makes any page `HTMLElement` or `Range` (`target`) visible inside the browser viewport.\n * This helper will scroll all `target` ancestors and the web browser viewport to reveal the target to\n * the user. If the `target` is already visible, nothing will happen.\n *\n * @param {HTMLElement|Range} options.target A target, which supposed to become visible to the user.\n * @param {Number} [options.viewportOffset] An offset from the edge of the viewport (in pixels)\n * the `target` will be moved by when the viewport is scrolled. It enhances the user experience\n * by keeping the `target` some distance from the edge of the viewport and thus making it easier to\n * read or edit by the user.\n */\nexport function scrollViewportToShowTarget( { target, viewportOffset = 0 } ) {\n\tconst targetWindow = getWindow( target );\n\tlet currentWindow = targetWindow;\n\tlet currentFrame = null;\n\n\t// Iterate over all windows, starting from target's parent window up to window#top.\n\twhile ( currentWindow ) {\n\t\tlet firstAncestorToScroll;\n\n\t\t// Let's scroll target's ancestors first to reveal it. Then, once the ancestor scrolls\n\t\t// settled down, the algorithm can eventually scroll the viewport of the current window.\n\t\t//\n\t\t// Note: If the current window is target's **original** window (e.g. the first one),\n\t\t// start scrolling the closest parent of the target. If not, scroll the closest parent\n\t\t// of an iframe that resides in the current window.\n\t\tif ( currentWindow == targetWindow ) {\n\t\t\tfirstAncestorToScroll = getParentElement( target );\n\t\t} else {\n\t\t\tfirstAncestorToScroll = getParentElement( currentFrame );\n\t\t}\n\n\t\t// Scroll the target's ancestors first. Once done, scrolling the viewport is easy.\n\t\tscrollAncestorsToShowRect( firstAncestorToScroll, () => {\n\t\t\t// Note: If the target does not belong to the current window **directly**,\n\t\t\t// i.e. it resides in an iframe belonging to the window, obtain the target's rect\n\t\t\t// in the coordinates of the current window. By default, a Rect returns geometry\n\t\t\t// relative to the current window's viewport. To make it work in a parent window,\n\t\t\t// it must be shifted.\n\t\t\treturn getRectRelativeToWindow( target, currentWindow );\n\t\t} );\n\n\t\t// Obtain the rect of the target after it has been scrolled within its ancestors.\n\t\t// It's time to scroll the viewport.\n\t\tconst targetRect = getRectRelativeToWindow( target, currentWindow );\n\n\t\tscrollWindowToShowRect( currentWindow, targetRect, viewportOffset );\n\n\t\tif ( currentWindow.parent != currentWindow ) {\n\t\t\t// Keep the reference to the <iframe> element the \"previous current window\" was\n\t\t\t// rendered within. It will be useful to re–calculate the rect of the target\n\t\t\t// in the parent window's relative geometry. The target's rect must be shifted\n\t\t\t// by it's iframe's position.\n\t\t\tcurrentFrame = currentWindow.frameElement;\n\t\t\tcurrentWindow = currentWindow.parent;\n\n\t\t\t// If the current window has some parent but frameElement is inaccessible, then they have\n\t\t\t// different domains/ports and, due to security reasons, accessing and scrolling\n\t\t\t// the parent window won't be possible.\n\t\t\t// See https://github.com/ckeditor/ckeditor5/issues/930.\n\t\t\tif ( !currentFrame ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t} else {\n\t\t\tcurrentWindow = null;\n\t\t}\n\t}\n}\n\n/**\n * Makes any page `HTMLElement` or `Range` (target) visible within its scrollable ancestors,\n * e.g. if they have `overflow: scroll` CSS style.\n *\n * @param {HTMLElement|Range} target A target, which supposed to become visible to the user.\n */\nexport function scrollAncestorsToShowTarget( target ) {\n\tconst targetParent = getParentElement( target );\n\n\tscrollAncestorsToShowRect( targetParent, () => {\n\t\treturn new Rect( target );\n\t} );\n}\n\n// TODO: Using a property value shorthand in the top of the file\n// causes JSDoc to throw errors. See https://github.com/cksource/docs-builder/issues/75.\nObject.assign( utils, {\n\tscrollViewportToShowTarget,\n\tscrollAncestorsToShowTarget\n} );\n\n// Makes a given rect visible within its parent window.\n//\n// Note: Avoid the situation where the caret is still in the viewport, but totally\n// at the edge of it. In such situation, if it moved beyond the viewport in the next\n// action e.g. after paste, the scrolling would move it to the viewportOffset level\n// and it all would look like the caret visually moved up/down:\n//\n// 1.\n//\t\t| foo[]\n//\t\t| <--- N px of space below the caret\n//\t\t+---------------------------------...\n//\n// 2. *paste*\n// 3.\n//\t\t|\n//\t\t|\n//\t\t+-foo-----------------------------...\n//\t\t bar[] <--- caret below viewport, scrolling...\n//\n// 4. *scrolling*\n// 5.\n//\t\t|\n//\t\t| foo\n//\t\t| bar[] <--- caret precisely at the edge\n//\t\t+---------------------------------...\n//\n// To prevent this, this method checks the rects moved by the viewportOffset to cover\n// the upper/lower edge of the viewport. It makes sure if the action repeats, there's\n// no twitching – it's a purely visual improvement:\n//\n// 5. (after fix)\n//\t\t|\n//\t\t| foo\n//\t\t| bar[]\n//\t\t| <--- N px of space below the caret\n//\t\t+---------------------------------...\n//\n// @private\n// @param {Window} window A window which is scrolled to reveal the rect.\n// @param {module:utils/dom/rect~Rect} rect A rect which is to be revealed.\n// @param {Number} viewportOffset See scrollViewportToShowTarget.\nfunction scrollWindowToShowRect( window, rect, viewportOffset ) {\n\tconst targetShiftedDownRect = rect.clone().moveBy( 0, viewportOffset );\n\tconst targetShiftedUpRect = rect.clone().moveBy( 0, -viewportOffset );\n\tconst viewportRect = new Rect( window ).excludeScrollbarsAndBorders();\n\n\tconst rects = [ targetShiftedUpRect, targetShiftedDownRect ];\n\n\tif ( !rects.every( rect => viewportRect.contains( rect ) ) ) {\n\t\tlet { scrollX, scrollY } = window;\n\n\t\tif ( isAbove( targetShiftedUpRect, viewportRect ) ) {\n\t\t\tscrollY -= viewportRect.top - rect.top + viewportOffset;\n\t\t} else if ( isBelow( targetShiftedDownRect, viewportRect ) ) {\n\t\t\tscrollY += rect.bottom - viewportRect.bottom + viewportOffset;\n\t\t}\n\n\t\t// TODO: Web browsers scroll natively to place the target in the middle\n\t\t// of the viewport. It's not a very popular case, though.\n\t\tif ( isLeftOf( rect, viewportRect ) ) {\n\t\t\tscrollX -= viewportRect.left - rect.left + viewportOffset;\n\t\t} else if ( isRightOf( rect, viewportRect ) ) {\n\t\t\tscrollX += rect.right - viewportRect.right + viewportOffset;\n\t\t}\n\n\t\twindow.scrollTo( scrollX, scrollY );\n\t}\n}\n\n// Recursively scrolls element ancestors to visually reveal a rect.\n//\n// @private\n// @param {HTMLElement} A parent The first ancestors to start scrolling.\n// @param {Function} getRect A function which returns the Rect, which is to be revealed.\nfunction scrollAncestorsToShowRect( parent, getRect ) {\n\tconst parentWindow = getWindow( parent );\n\tlet parentRect, targetRect;\n\n\twhile ( parent != parentWindow.document.body ) {\n\t\ttargetRect = getRect();\n\t\tparentRect = new Rect( parent ).excludeScrollbarsAndBorders();\n\n\t\tif ( !parentRect.contains( targetRect ) ) {\n\t\t\tif ( isAbove( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollTop -= parentRect.top - targetRect.top;\n\t\t\t} else if ( isBelow( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollTop += targetRect.bottom - parentRect.bottom;\n\t\t\t}\n\n\t\t\tif ( isLeftOf( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollLeft -= parentRect.left - targetRect.left;\n\t\t\t} else if ( isRightOf( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollLeft += targetRect.right - parentRect.right;\n\t\t\t}\n\t\t}\n\n\t\tparent = parent.parentNode;\n\t}\n}\n\n// Determines if a given `Rect` extends beyond the bottom edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isBelow( firstRect, secondRect ) {\n\treturn firstRect.bottom > secondRect.bottom;\n}\n\n// Determines if a given `Rect` extends beyond the top edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isAbove( firstRect, secondRect ) {\n\treturn firstRect.top < secondRect.top;\n}\n\n// Determines if a given `Rect` extends beyond the left edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isLeftOf( firstRect, secondRect ) {\n\treturn firstRect.left < secondRect.left;\n}\n\n// Determines if a given `Rect` extends beyond the right edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isRightOf( firstRect, secondRect ) {\n\treturn firstRect.right > secondRect.right;\n}\n\n// Returns the closest window of an element or range.\n//\n// @private\n// @param {HTMLElement|Range} firstRect\n// @returns {Window}\nfunction getWindow( elementOrRange ) {\n\tif ( isRange( elementOrRange ) ) {\n\t\treturn elementOrRange.startContainer.ownerDocument.defaultView;\n\t} else {\n\t\treturn elementOrRange.ownerDocument.defaultView;\n\t}\n}\n\n// Returns the closest parent of an element or DOM range.\n//\n// @private\n// @param {HTMLElement|Range} firstRect\n// @returns {HTMLelement}\nfunction getParentElement( elementOrRange ) {\n\tif ( isRange( elementOrRange ) ) {\n\t\tlet parent = elementOrRange.commonAncestorContainer;\n\n\t\t// If a Range is attached to the Text, use the closest element ancestor.\n\t\tif ( isText( parent ) ) {\n\t\t\tparent = parent.parentNode;\n\t\t}\n\n\t\treturn parent;\n\t} else {\n\t\treturn elementOrRange.parentNode;\n\t}\n}\n\n// Returns the rect of an element or range residing in an iframe.\n// The result rect is relative to the geometry of the passed window instance.\n//\n// @private\n// @param {HTMLElement|Range} target Element or range which rect should be returned.\n// @param {Window} relativeWindow A window the rect should be relative to.\n// @returns {module:utils/dom/rect~Rect}\nfunction getRectRelativeToWindow( target, relativeWindow ) {\n\tconst targetWindow = getWindow( target );\n\tconst rect = new Rect( target );\n\n\tif ( targetWindow === relativeWindow ) {\n\t\treturn rect;\n\t} else {\n\t\tlet currentWindow = targetWindow;\n\n\t\twhile ( currentWindow != relativeWindow ) {\n\t\t\tconst frame = currentWindow.frameElement;\n\t\t\tconst frameRect = new Rect( frame ).excludeScrollbarsAndBorders();\n\n\t\t\trect.moveBy( frameRect.left, frameRect.top );\n\n\t\t\tcurrentWindow = currentWindow.parent;\n\t\t}\n\t}\n\n\treturn rect;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/view\n */\n\nimport Document from './document';\nimport DowncastWriter from './downcastwriter';\nimport Renderer from './renderer';\nimport DomConverter from './domconverter';\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\n\nimport MutationObserver from './observer/mutationobserver';\nimport KeyObserver from './observer/keyobserver';\nimport FakeSelectionObserver from './observer/fakeselectionobserver';\nimport SelectionObserver from './observer/selectionobserver';\nimport FocusObserver from './observer/focusobserver';\nimport CompositionObserver from './observer/compositionobserver';\nimport InputObserver from './observer/inputobserver';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { scrollViewportToShowTarget } from '@ckeditor/ckeditor5-utils/src/dom/scroll';\nimport { injectUiElementHandling } from './uielement';\nimport { injectQuirksHandling } from './filler';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Editor's view controller class. Its main responsibility is DOM - View management for editing purposes, to provide\n * abstraction over the DOM structure and events and hide all browsers quirks.\n *\n * View controller renders view document to DOM whenever view structure changes. To determine when view can be rendered,\n * all changes need to be done using the {@link module:engine/view/view~View#change} method, using\n * {@link module:engine/view/downcastwriter~DowncastWriter}:\n *\n *\t\tview.change( writer => {\n *\t\t\twriter.insert( position, writer.createText( 'foo' ) );\n *\t\t} );\n *\n * View controller also register {@link module:engine/view/observer/observer~Observer observers} which observes changes\n * on DOM and fire events on the {@link module:engine/view/document~Document Document}.\n * Note that the following observers are added by the class constructor and are always available:\n *\n * * {@link module:engine/view/observer/mutationobserver~MutationObserver},\n * * {@link module:engine/view/observer/selectionobserver~SelectionObserver},\n * * {@link module:engine/view/observer/focusobserver~FocusObserver},\n * * {@link module:engine/view/observer/keyobserver~KeyObserver},\n * * {@link module:engine/view/observer/fakeselectionobserver~FakeSelectionObserver}.\n * * {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * This class also {@link module:engine/view/view~View#attachDomRoot binds the DOM and the view elements}.\n *\n * If you do not need full a DOM - view management, and only want to transform a tree of view elements to a tree of DOM\n * elements you do not need this controller. You can use the {@link module:engine/view/domconverter~DomConverter DomConverter} instead.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class View {\n\tconstructor() {\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/document~Document} associated with this view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = new Document();\n\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/domconverter~DomConverter domConverter} used by\n\t\t * {@link module:engine/view/view~View#_renderer renderer}\n\t\t * and {@link module:engine/view/observer/observer~Observer observers}.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = new DomConverter();\n\n\t\t/**\n\t\t * Roots of the DOM tree. Map on the `HTMLElement`s with roots names as keys.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Map.<String, HTMLElement>}\n\t\t */\n\t\tthis.domRoots = new Map();\n\n\t\t/**\n\t\t * Used to prevent calling {@link #forceRender} and {@link #change} during rendering view to the DOM.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isRenderingInProgress\n\t\t */\n\t\tthis.set( 'isRenderingInProgress', false );\n\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/renderer~Renderer renderer}.\n\t\t *\n\t\t * @protected\n\t\t * @type {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis._renderer = new Renderer( this.domConverter, this.document.selection );\n\t\tthis._renderer.bind( 'isFocused' ).to( this.document );\n\n\t\t/**\n\t\t * A DOM root attributes cache. It saves the initial values of DOM root attributes before the DOM element\n\t\t * is {@link module:engine/view/view~View#attachDomRoot attached} to the view so later on, when\n\t\t * the view is destroyed ({@link module:engine/view/view~View#detachDomRoot}), they can be easily restored.\n\t\t * This way, the DOM element can go back to the (clean) state as if the editing view never used it.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap.<HTMLElement,Object>}\n\t\t */\n\t\tthis._initialDomRootAttributes = new WeakMap();\n\n\t\t/**\n\t\t * Map of registered {@link module:engine/view/observer/observer~Observer observers}.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<Function, module:engine/view/observer/observer~Observer>}\n\t\t */\n\t\tthis._observers = new Map();\n\n\t\t/**\n\t\t * Is set to `true` when {@link #change view changes} are currently in progress.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._ongoingChange = false;\n\n\t\t/**\n\t\t * Used to prevent calling {@link #forceRender} and {@link #change} during rendering view to the DOM.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._postFixersInProgress = false;\n\n\t\t/**\n\t\t * Internal flag to temporary disable rendering. See the usage in the {@link #_disableRendering}.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._renderingDisabled = false;\n\n\t\t/**\n\t\t * Internal flag that disables rendering when there are no changes since the last rendering.\n\t\t * It stores information about changed selection and changed elements from attached document roots.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._hasChangedSinceTheLastRendering = false;\n\n\t\t/**\n\t\t * DowncastWriter instance used in {@link #change change method} callbacks.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/view/downcastwriter~DowncastWriter}\n\t\t */\n\t\tthis._writer = new DowncastWriter( this.document );\n\n\t\t// Add default observers.\n\t\tthis.addObserver( MutationObserver );\n\t\tthis.addObserver( SelectionObserver );\n\t\tthis.addObserver( FocusObserver );\n\t\tthis.addObserver( KeyObserver );\n\t\tthis.addObserver( FakeSelectionObserver );\n\t\tthis.addObserver( CompositionObserver );\n\n\t\tif ( env.isAndroid ) {\n\t\t\tthis.addObserver( InputObserver );\n\t\t}\n\n\t\t// Inject quirks handlers.\n\t\tinjectQuirksHandling( this );\n\t\tinjectUiElementHandling( this );\n\n\t\t// Use 'normal' priority so that rendering is performed as first when using that priority.\n\t\tthis.on( 'render', () => {\n\t\t\tthis._render();\n\n\t\t\t// Informs that layout has changed after render.\n\t\t\tthis.document.fire( 'layoutChanged' );\n\n\t\t\t// Reset the `_hasChangedSinceTheLastRendering` flag after rendering.\n\t\t\tthis._hasChangedSinceTheLastRendering = false;\n\t\t} );\n\n\t\t// Listen to the document selection changes directly.\n\t\tthis.listenTo( this.document.selection, 'change', () => {\n\t\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\t} );\n\t}\n\n\t/**\n\t * Attaches a DOM root element to the view element and enable all observers on that element.\n\t * Also {@link module:engine/view/renderer~Renderer#markToSync mark element} to be synchronized\n\t * with the view what means that all child nodes will be removed and replaced with content of the view root.\n\t *\n\t * This method also will change view element name as the same as tag name of given dom root.\n\t * Name is always transformed to lower case.\n\t *\n\t * **Note:** Use {@link #detachDomRoot `detachDomRoot()`} to revert this action.\n\t *\n\t * @param {Element} domRoot DOM root element.\n\t * @param {String} [name='main'] Name of the root.\n\t */\n\tattachDomRoot( domRoot, name = 'main' ) {\n\t\tconst viewRoot = this.document.getRoot( name );\n\n\t\t// Set view root name the same as DOM root tag name.\n\t\tviewRoot._name = domRoot.tagName.toLowerCase();\n\n\t\tconst initialDomRootAttributes = {};\n\n\t\t// 1. Copy and cache the attributes to remember the state of the element before attaching.\n\t\t// The cached attributes will be restored in detachDomRoot() so the element goes to the\n\t\t// clean state as if the editing view never used it.\n\t\t// 2. Apply the attributes using the view writer, so they all go under the control of the engine.\n\t\t// The editing view takes over the attribute management completely because various\n\t\t// features (e.g. addPlaceholder()) require dynamic changes of those attributes and they\n\t\t// cannot be managed by the engine and the UI library at the same time.\n\t\tfor ( const { name, value } of Array.from( domRoot.attributes ) ) {\n\t\t\tinitialDomRootAttributes[ name ] = value;\n\n\t\t\t// Do not use writer.setAttribute() for the class attribute. The EditableUIView class\n\t\t\t// and its descendants could have already set some using the writer.addClass() on the view\n\t\t\t// document root. They haven't been rendered yet so they are not present in the DOM root.\n\t\t\t// Using writer.setAttribute( 'class', ... ) would override them completely.\n\t\t\tif ( name === 'class' ) {\n\t\t\t\tthis._writer.addClass( value.split( ' ' ), viewRoot );\n\t\t\t} else {\n\t\t\t\tthis._writer.setAttribute( name, value, viewRoot );\n\t\t\t}\n\t\t}\n\n\t\tthis._initialDomRootAttributes.set( domRoot, initialDomRootAttributes );\n\n\t\tconst updateContenteditableAttribute = () => {\n\t\t\tthis._writer.setAttribute( 'contenteditable', !viewRoot.isReadOnly, viewRoot );\n\n\t\t\tif ( viewRoot.isReadOnly ) {\n\t\t\t\tthis._writer.addClass( 'ck-read-only', viewRoot );\n\t\t\t} else {\n\t\t\t\tthis._writer.removeClass( 'ck-read-only', viewRoot );\n\t\t\t}\n\t\t};\n\n\t\t// Set initial value.\n\t\tupdateContenteditableAttribute();\n\n\t\tthis.domRoots.set( name, domRoot );\n\t\tthis.domConverter.bindElements( domRoot, viewRoot );\n\t\tthis._renderer.markToSync( 'children', viewRoot );\n\t\tthis._renderer.markToSync( 'attributes', viewRoot );\n\t\tthis._renderer.domDocuments.add( domRoot.ownerDocument );\n\n\t\tviewRoot.on( 'change:children', ( evt, node ) => this._renderer.markToSync( 'children', node ) );\n\t\tviewRoot.on( 'change:attributes', ( evt, node ) => this._renderer.markToSync( 'attributes', node ) );\n\t\tviewRoot.on( 'change:text', ( evt, node ) => this._renderer.markToSync( 'text', node ) );\n\t\tviewRoot.on( 'change:isReadOnly', () => this.change( updateContenteditableAttribute ) );\n\n\t\tviewRoot.on( 'change', () => {\n\t\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\t} );\n\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.observe( domRoot, name );\n\t\t}\n\t}\n\n\t/**\n\t * Detaches a DOM root element from the view element and restores its attributes to the state before\n\t * {@link #attachDomRoot `attachDomRoot()`}.\n\t *\n\t * @param {String} name Name of the root to detach.\n\t */\n\tdetachDomRoot( name ) {\n\t\tconst domRoot = this.domRoots.get( name );\n\n\t\t// Remove all root attributes so the DOM element is \"bare\".\n\t\tArray.from( domRoot.attributes ).forEach( ( { name } ) => domRoot.removeAttribute( name ) );\n\n\t\tconst initialDomRootAttributes = this._initialDomRootAttributes.get( domRoot );\n\n\t\t// Revert all view root attributes back to the state before attachDomRoot was called.\n\t\tfor ( const attribute in initialDomRootAttributes ) {\n\t\t\tdomRoot.setAttribute( attribute, initialDomRootAttributes[ attribute ] );\n\t\t}\n\n\t\tthis.domRoots.delete( name );\n\t\tthis.domConverter.unbindDomElement( domRoot );\n\t}\n\n\t/**\n\t * Gets DOM root element.\n\t *\n\t * @param {String} [name='main'] Name of the root.\n\t * @returns {Element} DOM root element instance.\n\t */\n\tgetDomRoot( name = 'main' ) {\n\t\treturn this.domRoots.get( name );\n\t}\n\n\t/**\n\t * Creates observer of the given type if not yet created, {@link module:engine/view/observer/observer~Observer#enable enables} it\n\t * and {@link module:engine/view/observer/observer~Observer#observe attaches} to all existing and future\n\t * {@link #domRoots DOM roots}.\n\t *\n\t * Note: Observers are recognized by their constructor (classes). A single observer will be instantiated and used only\n\t * when registered for the first time. This means that features and other components can register a single observer\n\t * multiple times without caring whether it has been already added or not.\n\t *\n\t * @param {Function} Observer The constructor of an observer to add.\n\t * Should create an instance inheriting from {@link module:engine/view/observer/observer~Observer}.\n\t * @returns {module:engine/view/observer/observer~Observer} Added observer instance.\n\t */\n\taddObserver( Observer ) {\n\t\tlet observer = this._observers.get( Observer );\n\n\t\tif ( observer ) {\n\t\t\treturn observer;\n\t\t}\n\n\t\tobserver = new Observer( this );\n\n\t\tthis._observers.set( Observer, observer );\n\n\t\tfor ( const [ name, domElement ] of this.domRoots ) {\n\t\t\tobserver.observe( domElement, name );\n\t\t}\n\n\t\tobserver.enable();\n\n\t\treturn observer;\n\t}\n\n\t/**\n\t * Returns observer of the given type or `undefined` if such observer has not been added yet.\n\t *\n\t * @param {Function} Observer The constructor of an observer to get.\n\t * @returns {module:engine/view/observer/observer~Observer|undefined} Observer instance or undefined.\n\t */\n\tgetObserver( Observer ) {\n\t\treturn this._observers.get( Observer );\n\t}\n\n\t/**\n\t * Disables all added observers.\n\t */\n\tdisableObservers() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.disable();\n\t\t}\n\t}\n\n\t/**\n\t * Enables all added observers.\n\t */\n\tenableObservers() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.enable();\n\t\t}\n\t}\n\n\t/**\n\t * Scrolls the page viewport and {@link #domRoots} with their ancestors to reveal the\n\t * caret, if not already visible to the user.\n\t */\n\tscrollToTheSelection() {\n\t\tconst range = this.document.selection.getFirstRange();\n\n\t\tif ( range ) {\n\t\t\tscrollViewportToShowTarget( {\n\t\t\t\ttarget: this.domConverter.viewRangeToDom( range ),\n\t\t\t\tviewportOffset: 20\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * It will focus DOM element representing {@link module:engine/view/editableelement~EditableElement EditableElement}\n\t * that is currently having selection inside.\n\t */\n\tfocus() {\n\t\tif ( !this.document.isFocused ) {\n\t\t\tconst editable = this.document.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t\tthis.forceRender();\n\t\t\t} else {\n\t\t\t\t// Before focusing view document, selection should be placed inside one of the view's editables.\n\t\t\t\t// Normally its selection will be converted from model document (which have default selection), but\n\t\t\t\t// when using view document on its own, we need to manually place selection before focusing it.\n\t\t\t\t//\n\t\t\t\t// @if CK_DEBUG // console.warn( 'There is no selection in any editable to focus.' );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * The `change()` method is the primary way of changing the view. You should use it to modify any node in the view tree.\n\t * It makes sure that after all changes are made the view is rendered to the DOM (assuming that the view will be changed\n\t * inside the callback). It prevents situations when the DOM is updated when the view state is not yet correct. It allows\n\t * to nest calls one inside another and still performs a single rendering after all those changes are made.\n\t * It also returns the return value of its callback.\n\t *\n\t *\t\tconst text = view.change( writer => {\n\t *\t\t\tconst newText = writer.createText( 'foo' );\n\t *\t\t\twriter.insert( position1, newText );\n\t *\n\t *\t\t\tview.change( writer => {\n\t *\t\t\t\twriter.insert( position2, writer.createText( 'bar' ) );\n\t *\t\t\t} );\n\t *\n\t * \t\t\twriter.remove( range );\n\t *\n\t * \t\t\treturn newText;\n\t *\t\t} );\n\t *\n\t * When the outermost change block is done and rendering to the DOM is over the\n\t * {@link module:engine/view/view~View#event:render `View#render`} event is fired.\n\t *\n\t * This method throws a `applying-view-changes-on-rendering` error when\n\t * the change block is used after rendering to the DOM has started.\n\t *\n\t * @param {Function} callback Callback function which may modify the view.\n\t * @returns {*} Value returned by the callback.\n\t */\n\tchange( callback ) {\n\t\tif ( this.isRenderingInProgress || this._postFixersInProgress ) {\n\t\t\t/**\n\t\t\t * Thrown when there is an attempt to make changes to the view tree when it is in incorrect state. This may\n\t\t\t * cause some unexpected behaviour and inconsistency between the DOM and the view.\n\t\t\t * This may be caused by:\n\t\t\t *\n\t\t\t * * calling {@link #change} or {@link #forceRender} during rendering process,\n\t\t\t * * calling {@link #change} or {@link #forceRender} inside of\n\t\t\t * {@link module:engine/view/document~Document#registerPostFixer post-fixer function}.\n\t\t\t *\n\t\t\t * @error cannot-change-view-tree\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'cannot-change-view-tree: ' +\n\t\t\t\t'Attempting to make changes to the view when it is in an incorrect state: rendering or post-fixers are in progress. ' +\n\t\t\t\t'This may cause some unexpected behavior and inconsistency between the DOM and the view.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\ttry {\n\t\t\t// Recursive call to view.change() method - execute listener immediately.\n\t\t\tif ( this._ongoingChange ) {\n\t\t\t\treturn callback( this._writer );\n\t\t\t}\n\n\t\t\t// This lock will assure that all recursive calls to view.change() will end up in same block - one \"render\"\n\t\t\t// event for all nested calls.\n\t\t\tthis._ongoingChange = true;\n\t\t\tconst callbackResult = callback( this._writer );\n\t\t\tthis._ongoingChange = false;\n\n\t\t\t// This lock is used by editing controller to render changes from outer most model.change() once. As plugins might call\n\t\t\t// view.change() inside model.change() block - this will ensures that postfixers and rendering are called once after all\n\t\t\t// changes. Also, we don't need to render anything if there're no changes since last rendering.\n\t\t\tif ( !this._renderingDisabled && this._hasChangedSinceTheLastRendering ) {\n\t\t\t\tthis._postFixersInProgress = true;\n\t\t\t\tthis.document._callPostFixers( this._writer );\n\t\t\t\tthis._postFixersInProgress = false;\n\n\t\t\t\tthis.fire( 'render' );\n\t\t\t}\n\n\t\t\treturn callbackResult;\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * Forces rendering {@link module:engine/view/document~Document view document} to DOM. If any view changes are\n\t * currently in progress, rendering will start after all {@link #change change blocks} are processed.\n\t *\n\t * Note that this method is dedicated for special cases. All view changes should be wrapped in the {@link #change}\n\t * block and the view will automatically check whether it needs to render DOM or not.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `applying-view-changes-on-rendering` when\n\t * trying to re-render when rendering to DOM has already started.\n\t */\n\tforceRender() {\n\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\tthis.change( () => {} );\n\t}\n\n\t/**\n\t * Destroys this instance. Makes sure that all observers are destroyed and listeners removed.\n\t */\n\tdestroy() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.destroy();\n\t\t}\n\n\t\tthis.document.destroy();\n\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t Creates new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = view.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = view.createRange( start, end );\n\t *\t\tconst selection = view.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ view.createRange( start1, end2 ), view.createRange( star2, end2 ) ];\n\t *\t\tconst selection = view.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = view.createSelection();\n\t *\t\tconst selection = view.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = view.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = view.createPositionFromPath( root, path );\n\t *\t\tconst selection = view.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = view.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = view.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = view.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = view.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s factory method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = view.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = view.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Disables or enables rendering. If the flag is set to `true` then the rendering will be disabled.\n\t * If the flag is set to `false` and if there was some change in the meantime, then the rendering action will be performed.\n\t *\n\t * @protected\n\t * @param {Boolean} flag A flag indicates whether the rendering should be disabled.\n\t */\n\t_disableRendering( flag ) {\n\t\tthis._renderingDisabled = flag;\n\n\t\tif ( flag == false ) {\n\t\t\t// Render when you stop blocking rendering.\n\t\t\tthis.change( () => {} );\n\t\t}\n\t}\n\n\t/**\n\t * Renders all changes. In order to avoid triggering the observers (e.g. mutations) all observers are disabled\n\t * before rendering and re-enabled after that.\n\t *\n\t * @private\n\t */\n\t_render() {\n\t\tthis.isRenderingInProgress = true;\n\t\tthis.disableObservers();\n\t\tthis._renderer.render();\n\t\tthis.enableObservers();\n\t\tthis.isRenderingInProgress = false;\n\t}\n\n\t/**\n\t * Fired after a topmost {@link module:engine/view/view~View#change change block} and all\n\t * {@link module:engine/view/document~Document#registerPostFixer post-fixers} are executed.\n\t *\n\t * Actual rendering is performed as a first listener on 'normal' priority.\n\t *\n\t *\t\tview.on( 'render', () => {\n\t *\t\t\t// Rendering to the DOM is complete.\n\t *\t\t} );\n\t *\n\t * This event is useful when you want to update interface elements after the rendering, e.g. position of the\n\t * balloon panel. If you wants to change view structure use\n\t * {@link module:engine/view/document~Document#registerPostFixer post-fixers}.\n\t *\n\t * @event module:engine/view/view~View#event:render\n\t */\n}\n\nmix( View, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/tomap\n */\n\nimport objectToMap from './objecttomap';\nimport { isPlainObject } from 'lodash-es';\n\n/**\n * Transforms object or iterable to map. Iterable needs to be in the format acceptable by the `Map` constructor.\n *\n *\t\tmap = toMap( { 'foo': 1, 'bar': 2 } );\n *\t\tmap = toMap( [ [ 'foo', 1 ], [ 'bar', 2 ] ] );\n *\t\tmap = toMap( anotherMap );\n *\n * @param {Object|Iterable} data Object or iterable to transform.\n * @returns {Map} Map created from data.\n */\nexport default function toMap( data ) {\n\tif ( isPlainObject( data ) ) {\n\t\treturn objectToMap( data );\n\t} else {\n\t\treturn new Map( data );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/node\n */\n\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Model node. Most basic structure of model tree.\n *\n * This is an abstract class that is a base for other classes representing different nodes in model.\n *\n * **Note:** If a node is detached from the model tree, you can manipulate it using it's API.\n * However, it is **very important** that nodes already attached to model tree should be only changed through\n * {@link module:engine/model/writer~Writer Writer API}.\n *\n * Changes done by `Node` methods, like {@link module:engine/model/element~Element#_insertChild _insertChild} or\n * {@link module:engine/model/node~Node#_setAttribute _setAttribute}\n * do not generate {@link module:engine/model/operation/operation~Operation operations}\n * which are essential for correct editor work if you modify nodes in {@link module:engine/model/document~Document document} root.\n *\n * The flow of working on `Node` (and classes that inherits from it) is as such:\n * 1. You can create a `Node` instance, modify it using it's API.\n * 2. Add `Node` to the model using `Batch` API.\n * 3. Change `Node` that was already added to the model using `Batch` API.\n *\n * Similarly, you cannot use `Batch` API on a node that has not been added to the model tree, with the exception\n * of {@link module:engine/model/writer~Writer#insert inserting} that node to the model tree.\n *\n * Be aware that using {@link module:engine/model/writer~Writer#remove remove from Batch API} does not allow to use `Node` API because\n * the information about `Node` is still kept in model document.\n *\n * In case of {@link module:engine/model/element~Element element node}, adding and removing children also counts as changing a node and\n * follows same rules.\n */\nexport default class Node {\n\t/**\n\t * Creates a model node.\n\t *\n\t * This is an abstract class, so this constructor should not be used directly.\n\t *\n\t * @abstract\n\t * @param {Object} [attrs] Node's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\tconstructor( attrs ) {\n\t\t/**\n\t\t * Parent of this node. It could be {@link module:engine/model/element~Element}\n\t\t * or {@link module:engine/model/documentfragment~DocumentFragment}.\n\t\t * Equals to `null` if the node has no parent.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t\t */\n\t\tthis.parent = null;\n\n\t\t/**\n\t\t * Attributes set on this node.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/model/node~Node#_attrs\n\t\t */\n\t\tthis._attrs = toMap( attrs );\n\t}\n\n\t/**\n\t * Index of this node in it's parent or `null` if the node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that model tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget index() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( ( pos = this.parent.getChildIndex( this ) ) === null ) {\n\t\t\tthrow new CKEditorError( 'model-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Offset at which this node starts in it's parent. It is equal to the sum of {@link #offsetSize offsetSize}\n\t * of all it's previous siblings. Equals to `null` if node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that model tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget startOffset() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( ( pos = this.parent.getChildStartOffset( this ) ) === null ) {\n\t\t\tthrow new CKEditorError( 'model-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Offset size of this node. Represents how much \"offset space\" is occupied by the node in it's parent.\n\t * It is important for {@link module:engine/model/position~Position position}. When node has `offsetSize` greater than `1`, position\n\t * can be placed between that node start and end. `offsetSize` greater than `1` is for nodes that represents more\n\t * than one entity, i.e. {@link module:engine/model/text~Text text node}.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn 1;\n\t}\n\n\t/**\n\t * Offset at which this node ends in it's parent. It is equal to the sum of this node's\n\t * {@link module:engine/model/node~Node#startOffset start offset} and {@link #offsetSize offset size}.\n\t * Equals to `null` if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget endOffset() {\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.startOffset + this.offsetSize;\n\t}\n\n\t/**\n\t * Node's next sibling or `null` if the node is a last child of it's parent or if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget nextSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index + 1 ) ) || null;\n\t}\n\n\t/**\n\t * Node's previous sibling or `null` if the node is a first child of it's parent or if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget previousSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index - 1 ) ) || null;\n\t}\n\n\t/**\n\t * The top-most ancestor of the node. If node has no parent it is the root itself. If the node is a part\n\t * of {@link module:engine/model/documentfragment~DocumentFragment}, it's `root` is equal to that `DocumentFragment`.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\tlet root = this; // eslint-disable-line consistent-this\n\n\t\twhile ( root.parent ) {\n\t\t\troot = root.parent;\n\t\t}\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns this node or `null` if the node has no parent or is inside\n\t * a {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\t// This is a top element of a sub-tree.\n\t\tif ( this.root == this ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Root may be `DocumentFragment` which does not have document property.\n\t\treturn this.root.document || null;\n\t}\n\n\t/**\n\t * Gets path to the node. The path is an array containing starting offsets of consecutive ancestors of this node,\n\t * beginning from {@link module:engine/model/node~Node#root root}, down to this node's starting offset. The path can be used to\n\t * create {@link module:engine/model/position~Position Position} instance.\n\t *\n\t *\t\tconst abc = new Text( 'abc' );\n\t *\t\tconst foo = new Text( 'foo' );\n\t *\t\tconst h1 = new Element( 'h1', null, new Text( 'header' ) );\n\t *\t\tconst p = new Element( 'p', null, [ abc, foo ] );\n\t *\t\tconst div = new Element( 'div', null, [ h1, p ] );\n\t *\t\tfoo.getPath(); // Returns [ 1, 3 ]. `foo` is in `p` which is in `div`. `p` starts at offset 1, while `foo` at 3.\n\t *\t\th1.getPath(); // Returns [ 0 ].\n\t *\t\tdiv.getPath(); // Returns [].\n\t *\n\t * @returns {Array.<Number>} The path.\n\t */\n\tgetPath() {\n\t\tconst path = [];\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\twhile ( node.parent ) {\n\t\t\tpath.unshift( node.startOffset );\n\t\t\tnode = node.parent;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this node.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this node will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from node's parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both nodes.\n\t *\n\t * @param {module:engine/model/node~Node} node The second node.\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` both nodes will be considered \"ancestors\" too.\n\t * Which means that if e.g. node A is inside B, then their common ancestor will be B.\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( node, options = {} ) {\n\t\tconst ancestorsA = this.getAncestors( options );\n\t\tconst ancestorsB = node.getAncestors( options );\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns whether this node is before given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/model/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/model/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisBefore( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisPath = this.getPath();\n\t\tconst nodePath = node.getPath();\n\n\t\tconst result = compareArrays( thisPath, nodePath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn true;\n\n\t\t\tcase 'extension':\n\t\t\t\treturn false;\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < nodePath[ result ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns whether this node is after given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/model/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/model/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisAfter( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// In other cases, just check if the `node` is before, and return the opposite.\n\t\treturn !this.isBefore( node );\n\t}\n\n\t/**\n\t * Checks if the node has an attribute with given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on node, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on node.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._attrs.entries();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._attrs.keys();\n\t}\n\n\t/**\n\t * Converts `Node` to plain object and returns it.\n\t *\n\t * @returns {Object} `Node` converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = {};\n\n\t\t// Serializes attributes to the object.\n\t\t// attributes = { a: 'foo', b: 1, c: true }.\n\t\tif ( this._attrs.size ) {\n\t\t\tjson.attributes = Array.from( this._attrs ).reduce( ( result, attr ) => {\n\t\t\t\tresult[ attr[ 0 ] ] = attr[ 1 ];\n\n\t\t\t\treturn result;\n\t\t\t}, {} );\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t * This method is useful when processing model objects that are of unknown type. For example, a function\n\t * may return a {@link module:engine/model/documentfragment~DocumentFragment} or a {@link module:engine/model/node~Node}\n\t * that can be either a text node or an element. This method can be used to check what kind of object is returned.\n\t *\n\t *\t\tsomeObject.is( 'element' ); // -> true if this is an element\n\t *\t\tsomeObject.is( 'node' ); // -> true if this is a node (a text node or an element)\n\t *\t\tsomeObject.is( 'documentFragment' ); // -> true if this is a document fragment\n\t *\n\t * Since this method is also available on a range of view objects, you can prefix the type of the object with\n\t * `model:` or `view:` to check, for example, if this is the model's or view's element:\n\t *\n\t *\t\tmodelElement.is( 'model:element' ); // -> true\n\t *\t\tmodelElement.is( 'view:element' ); // -> false\n\t *\n\t * By using this method it is also possible to check a name of an element:\n\t *\n\t *\t\timageElement.is( 'image' ); // -> true\n\t *\t\timageElement.is( 'element', 'image' ); // -> same as above\n\t *\t\timageElement.is( 'model:element', 'image' ); // -> same as above, but more precise\n\t *\n\t * The list of model objects which implement the `is()` method:\n\t *\n\t * * {@link module:engine/model/node~Node#is `Node#is()`}\n\t * * {@link module:engine/model/text~Text#is `Text#is()`}\n\t * * {@link module:engine/model/element~Element#is `Element#is()`}\n\t * * {@link module:engine/model/rootelement~RootElement#is `RootElement#is()`}\n\t * * {@link module:engine/model/position~Position#is `Position#is()`}\n\t * * {@link module:engine/model/liveposition~LivePosition#is `LivePosition#is()`}\n\t * * {@link module:engine/model/range~Range#is `Range#is()`}\n\t * * {@link module:engine/model/liverange~LiveRange#is `LiveRange#is()`}\n\t * * {@link module:engine/model/documentfragment~DocumentFragment#is `DocumentFragment#is()`}\n\t * * {@link module:engine/model/selection~Selection#is `Selection#is()`}\n\t * * {@link module:engine/model/documentselection~DocumentSelection#is `DocumentSelection#is()`}\n\t * * {@link module:engine/model/markercollection~Marker#is `Marker#is()`}\n\t * * {@link module:engine/model/textproxy~TextProxy#is `TextProxy#is()`}\n\t *\n\t * @method #is\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'node' || type == 'model:node';\n\t}\n\n\t/**\n\t * Creates a copy of this node, that is a node with exactly same attributes, and returns it.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/node~Node} Node with same attributes as this node.\n\t */\n\t_clone() {\n\t\treturn new Node( this._attrs );\n\t}\n\n\t/**\n\t * Removes this node from it's parent.\n\t *\n\t * @see module:engine/model/writer~Writer#remove\n\t * @protected\n\t */\n\t_remove() {\n\t\tthis.parent._removeChildren( this.index );\n\t}\n\n\t/**\n\t * Sets attribute on the node. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * @see module:engine/model/writer~Writer#setAttribute\n\t * @protected\n\t * @param {String} key Key of attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\t_setAttribute( key, value ) {\n\t\tthis._attrs.set( key, value );\n\t}\n\n\t/**\n\t * Removes all attributes from the node and sets given attributes.\n\t *\n\t * @see module:engine/model/writer~Writer#setAttributes\n\t * @protected\n\t * @param {Object} [attrs] Attributes to set. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\t_setAttributesTo( attrs ) {\n\t\tthis._attrs = toMap( attrs );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the node.\n\t *\n\t * @see module:engine/model/writer~Writer#removeAttribute\n\t * @protected\n\t * @param {String} key Key of attribute to remove.\n\t * @returns {Boolean} `true` if the attribute was set on the element, `false` otherwise.\n\t */\n\t_removeAttribute( key ) {\n\t\treturn this._attrs.delete( key );\n\t}\n\n\t/**\n\t * Removes all attributes from the node.\n\t *\n\t * @see module:engine/model/writer~Writer#clearAttributes\n\t * @protected\n\t */\n\t_clearAttributes() {\n\t\tthis._attrs.clear();\n\t}\n}\n\n/**\n * The node's parent does not contain this node.\n *\n * This error may be thrown from corrupted trees.\n *\n * @error model-node-not-found-in-parent\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/text\n */\n\nimport Node from './node';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToStringifiedObject } = require( '../dev-utils/utils' );\n\n/**\n * Model text node. Type of {@link module:engine/model/node~Node node} that contains {@link module:engine/model/text~Text#data text data}.\n *\n * **Important:** see {@link module:engine/model/node~Node} to read about restrictions using `Text` and `Node` API.\n *\n * **Note:** keep in mind that `Text` instances might indirectly got removed from model tree when model is changed.\n * This happens when {@link module:engine/model/writer~Writer model writer} is used to change model and the text node is merged with\n * another text node. Then, both text nodes are removed and a new text node is inserted into the model. Because of\n * this behavior, keeping references to `Text` is not recommended. Instead, consider creating\n * {@link module:engine/model/liveposition~LivePosition live position} placed before the text node.\n *\n * @extends module:engine/model/node~Node\n */\nexport default class Text extends Node {\n\t/**\n\t * Creates a text node.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createText} method instead.\n\t *\n\t * @protected\n\t * @param {String} data Node's text.\n\t * @param {Object} [attrs] Node's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\tconstructor( data, attrs ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Text data contained in this text node.\n\t\t *\n\t\t * @protected\n\t\t * @type {String}\n\t\t */\n\t\tthis._data = data || '';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Returns a text data contained in the node.\n\t *\n\t * @readonly\n\t * @type {String}\n\t */\n\tget data() {\n\t\treturn this._data;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\ttext.is( 'text' ); // -> true\n\t *\t\ttext.is( 'node' ); // -> true\n\t *\t\ttext.is( 'model:text' ); // -> true\n\t *\t\ttext.is( 'model:node' ); // -> true\n\t *\n\t *\t\ttext.is( 'view:text' ); // -> false\n\t *\t\ttext.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'text' || type == 'model:text' || super.is( type );\n\t}\n\n\t/**\n\t * Converts `Text` instance to plain object and returns it.\n\t *\n\t * @returns {Object} `Text` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.data = this.data;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a copy of this text node and returns it. Created text node has same text data and attributes as original text node.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/text~Text} `Text` instance created using given plain object.\n\t */\n\t_clone() {\n\t\treturn new Text( this.data, this.getAttributes() );\n\t}\n\n\t/**\n\t * Creates a `Text` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Text`.\n\t * @returns {module:engine/model/text~Text} `Text` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\treturn new Text( json.data, json.attributes );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelText: ${ this }, attrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/textproxy\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToStringifiedObject } = require( '../dev-utils/utils' );\n\n/**\n * `TextProxy` represents a part of {@link module:engine/model/text~Text text node}.\n *\n * Since {@link module:engine/model/position~Position positions} can be placed between characters of a text node,\n * {@link module:engine/model/range~Range ranges} may contain only parts of text nodes. When {@link module:engine/model/range~Range#getItems\n * getting items}\n * contained in such range, we need to represent a part of that text node, since returning the whole text node would be incorrect.\n * `TextProxy` solves this issue.\n *\n * `TextProxy` has an API similar to {@link module:engine/model/text~Text Text} and allows to do most of the common tasks performed\n * on model nodes.\n *\n * **Note:** Some `TextProxy` instances may represent whole text node, not just a part of it.\n * See {@link module:engine/model/textproxy~TextProxy#isPartial}.\n *\n * **Note:** `TextProxy` is not an instance of {@link module:engine/model/node~Node node}. Keep this in mind when using it as a\n * parameter of methods.\n *\n * **Note:** `TextProxy` is a readonly interface. If you want to perform changes on model data represented by a `TextProxy`\n * use {@link module:engine/model/writer~Writer model writer API}.\n *\n * **Note:** `TextProxy` instances are created on the fly, basing on the current state of model. Because of this, it is\n * highly unrecommended to store references to `TextProxy` instances. `TextProxy` instances are not refreshed when\n * model changes, so they might get invalidated. Instead, consider creating {@link module:engine/model/liveposition~LivePosition live\n * position}.\n *\n * `TextProxy` instances are created by {@link module:engine/model/treewalker~TreeWalker model tree walker}. You should not need to create\n * an instance of this class by your own.\n */\nexport default class TextProxy {\n\t/**\n\t * Creates a text proxy.\n\t *\n\t * @protected\n\t * @param {module:engine/model/text~Text} textNode Text node which part is represented by this text proxy.\n\t * @param {Number} offsetInText Offset in {@link module:engine/model/textproxy~TextProxy#textNode text node} from which the text proxy\n\t * starts.\n\t * @param {Number} length Text proxy length, that is how many text node's characters, starting from `offsetInText` it represents.\n\t * @constructor\n\t */\n\tconstructor( textNode, offsetInText, length ) {\n\t\t/**\n\t\t * Text node which part is represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/text~Text}\n\t\t */\n\t\tthis.textNode = textNode;\n\n\t\tif ( offsetInText < 0 || offsetInText > textNode.offsetSize ) {\n\t\t\t/**\n\t\t\t * Given `offsetInText` value is incorrect.\n\t\t\t *\n\t\t\t * @error model-textproxy-wrong-offsetintext\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.', this );\n\t\t}\n\n\t\tif ( length < 0 || offsetInText + length > textNode.offsetSize ) {\n\t\t\t/**\n\t\t\t * Given `length` value is incorrect.\n\t\t\t *\n\t\t\t * @error model-textproxy-wrong-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-textproxy-wrong-length: Given length value is incorrect.', this );\n\t\t}\n\n\t\t/**\n\t\t * Text data represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.data = textNode.data.substring( offsetInText, offsetInText + length );\n\n\t\t/**\n\t\t * Offset in {@link module:engine/model/textproxy~TextProxy#textNode text node} from which the text proxy starts.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.offsetInText = offsetInText;\n\t}\n\n\t/**\n\t * Offset at which this text proxy starts in it's parent.\n\t *\n\t * @see module:engine/model/node~Node#startOffset\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget startOffset() {\n\t\treturn this.textNode.startOffset !== null ? this.textNode.startOffset + this.offsetInText : null;\n\t}\n\n\t/**\n\t * Offset size of this text proxy. Equal to the number of characters represented by the text proxy.\n\t *\n\t * @see module:engine/model/node~Node#offsetSize\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Offset at which this text proxy ends in it's parent.\n\t *\n\t * @see module:engine/model/node~Node#endOffset\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget endOffset() {\n\t\treturn this.startOffset !== null ? this.startOffset + this.offsetSize : null;\n\t}\n\n\t/**\n\t * Flag indicating whether `TextProxy` instance covers only part of the original {@link module:engine/model/text~Text text node}\n\t * (`true`) or the whole text node (`false`).\n\t *\n\t * This is `false` when text proxy starts at the very beginning of {@link module:engine/model/textproxy~TextProxy#textNode textNode}\n\t * ({@link module:engine/model/textproxy~TextProxy#offsetInText offsetInText} equals `0`) and text proxy sizes is equal to\n\t * text node size.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isPartial() {\n\t\treturn this.offsetSize !== this.textNode.offsetSize;\n\t}\n\n\t/**\n\t * Parent of this text proxy, which is same as parent of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tget parent() {\n\t\treturn this.textNode.parent;\n\t}\n\n\t/**\n\t * Root of this text proxy, which is same as root of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.textNode.root;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns text node represented by this text proxy or `null` if the text node\n\t * has no parent or is inside a {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this.textNode.document;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\ttextProxy.is( 'textProxy' ); // -> true\n\t *\t\ttextProxy.is( 'model:textProxy' ); // -> true\n\t *\n\t *\t\ttextProxy.is( 'view:textProxy' ); // -> false\n\t *\t\ttextProxy.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'textProxy' || type == 'model:textProxy';\n\t}\n\n\t/**\n\t * Gets path to this text proxy.\n\t *\n\t * @see module:engine/model/node~Node#getPath\n\t * @returns {Array.<Number>}\n\t */\n\tgetPath() {\n\t\tconst path = this.textNode.getPath();\n\n\t\tif ( path.length > 0 ) {\n\t\t\tpath[ path.length - 1 ] += this.offsetInText;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this text proxy.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this text proxy will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from text proxy parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Checks if this text proxy has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on text proxy, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this.textNode.hasAttribute( key );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on text proxy.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this.textNode.getAttribute( key );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attributes. Attributes are returned as arrays containing two\n\t * items. First one is attribute key and second is attribute value.\n\t *\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this.textNode.getAttributes();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this.textNode.getAttributeKeys();\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelTextProxy: ${ this }, ` +\n\t// @if CK_DEBUG_ENGINE // \t\t`attrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/nodelist\n */\n\nimport Node from './node';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Provides an interface to operate on a list of {@link module:engine/model/node~Node nodes}. `NodeList` is used internally\n * in classes like {@link module:engine/model/element~Element Element}\n * or {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n */\nexport default class NodeList {\n\t/**\n\t * Creates an empty node list.\n\t *\n\t * @protected\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes contained in this node list.\n\t */\n\tconstructor( nodes ) {\n\t\t/**\n\t\t * Nodes contained in this node list.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<module:engine/model/node~Node>}\n\t\t */\n\t\tthis._nodes = [];\n\n\t\tif ( nodes ) {\n\t\t\tthis._insertNodes( 0, nodes );\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all nodes contained inside this node list.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._nodes[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Number of nodes contained inside this node list.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._nodes.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all nodes contained inside this node list.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._nodes.reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\t}\n\n\t/**\n\t * Gets the node at the given index. Returns `null` if incorrect index was passed.\n\t *\n\t * @param {Number} index Index of node.\n\t * @returns {module:engine/model/node~Node|null} Node at given index.\n\t */\n\tgetNode( index ) {\n\t\treturn this._nodes[ index ] || null;\n\t}\n\n\t/**\n\t * Returns an index of the given node. Returns `null` if given node is not inside this node list.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's index.\n\t */\n\tgetNodeIndex( node ) {\n\t\tconst index = this._nodes.indexOf( node );\n\n\t\treturn index == -1 ? null : index;\n\t}\n\n\t/**\n\t * Returns the starting offset of given node. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all nodes that are before this node in this node list.\n\t *\n\t * @param {module:engine/model/node~Node} node Node to look for.\n\t * @returns {Number|null} Node's starting offset.\n\t */\n\tgetNodeStartOffset( node ) {\n\t\tconst index = this.getNodeIndex( node );\n\n\t\treturn index === null ? null : this._nodes.slice( 0, index ).reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\t}\n\n\t/**\n\t * Converts index to offset in node list.\n\t *\n\t * Returns starting offset of a node that is at given index. Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError}\n\t * `model-nodelist-index-out-of-bounds` if given index is less than `0` or more than {@link #length}.\n\t *\n\t * @param {Number} index Node's index.\n\t * @returns {Number} Node's starting offset.\n\t */\n\tindexToOffset( index ) {\n\t\tif ( index == this._nodes.length ) {\n\t\t\treturn this.maxOffset;\n\t\t}\n\n\t\tconst node = this._nodes[ index ];\n\n\t\tif ( !node ) {\n\t\t\t/**\n\t\t\t * Given index cannot be found in the node list.\n\t\t\t *\n\t\t\t * @error nodelist-index-out-of-bounds\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-nodelist-index-out-of-bounds: Given index cannot be found in the node list.', this );\n\t\t}\n\n\t\treturn this.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Converts offset in node list to index.\n\t *\n\t * Returns index of a node that occupies given offset. Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError}\n\t * `model-nodelist-offset-out-of-bounds` if given offset is less than `0` or more than {@link #maxOffset}.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number} Index of a node that occupies given offset.\n\t */\n\toffsetToIndex( offset ) {\n\t\tlet totalOffset = 0;\n\n\t\tfor ( const node of this._nodes ) {\n\t\t\tif ( offset >= totalOffset && offset < totalOffset + node.offsetSize ) {\n\t\t\t\treturn this.getNodeIndex( node );\n\t\t\t}\n\n\t\t\ttotalOffset += node.offsetSize;\n\t\t}\n\n\t\tif ( totalOffset != offset ) {\n\t\t\t/**\n\t\t\t * Given offset cannot be found in the node list.\n\t\t\t *\n\t\t\t * @error model-nodelist-offset-out-of-bounds\n\t\t\t * @param {Number} offset\n\t\t\t * @param {module:engine/model/nodelist~NodeList} nodeList Stringified node list.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-nodelist-offset-out-of-bounds: Given offset cannot be found in the node list.',\n\t\t\t\tthis,\n\t\t\t\t{\n\t\t\t\t\toffset,\n\t\t\t\t\tnodeList: this\n\t\t\t\t}\n\t\t\t);\n\t\t}\n\n\t\treturn this.length;\n\t}\n\n\t/**\n\t * Inserts given nodes at given index.\n\t *\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes to be inserted.\n\t */\n\t_insertNodes( index, nodes ) {\n\t\t// Validation.\n\t\tfor ( const node of nodes ) {\n\t\t\tif ( !( node instanceof Node ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to insert an object which is not a Node instance.\n\t\t\t\t *\n\t\t\t\t * @error nodelist-insertNodes-not-node\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tthis._nodes.splice( index, 0, ...nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index.\n\t *\n\t * @protected\n\t * @param {Number} indexStart Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeNodes( indexStart, howMany = 1 ) {\n\t\treturn this._nodes.splice( indexStart, howMany );\n\t}\n\n\t/**\n\t * Converts `NodeList` instance to an array containing nodes that were inserted in the node list. Nodes\n\t * are also converted to their plain object representation.\n\t *\n\t * @returns {Array.<module:engine/model/node~Node>} `NodeList` instance converted to `Array`.\n\t */\n\ttoJSON() {\n\t\treturn this._nodes.map( node => node.toJSON() );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/element\n */\n\nimport Node from './node';\nimport NodeList from './nodelist';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n// @if CK_DEBUG_ENGINE // const { stringifyMap, convertMapToStringifiedObject, convertMapToTags } = require( '../dev-utils/utils' );\n\n/**\n * Model element. Type of {@link module:engine/model/node~Node node} that has a {@link module:engine/model/element~Element#name name} and\n * {@link module:engine/model/element~Element#getChildren child nodes}.\n *\n * **Important**: see {@link module:engine/model/node~Node} to read about restrictions using `Element` and `Node` API.\n *\n * @extends module:engine/model/node~Node\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a model element.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createElement} method instead.\n\t *\n\t * @protected\n\t * @param {String} name Element's name.\n\t * @param {Object} [attrs] Element's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t * @param {module:engine/model/node~Node|Iterable.<module:engine/model/node~Node>} [children]\n\t * One or more nodes to be inserted as children of created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Element name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:engine/model/element~Element#name\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * List of children nodes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/element~Element#_children\n\t\t */\n\t\tthis._children = new NodeList();\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Number of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._children.maxOffset;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\telement.is( 'element' ); // -> true\n\t *\t\telement.is( 'node' ); // -> true\n\t *\t\telement.is( 'model:element' ); // -> true\n\t *\t\telement.is( 'model:node' ); // -> true\n\t *\n\t *\t\telement.is( 'view:element' ); // -> false\n\t *\t\telement.is( 'documentSelection' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/model/element~Element#name name}:\n\t *\n\t *\t\telement.is( 'image' ); // -> true if this is an <image> element\n\t *\t\telement.is( 'element', 'image' ); // -> same as above\n\t *\t\ttext.is( 'image' ); -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^model:/, '' );\n\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'element' || cutType == this.name || super.is( type );\n\t\t} else {\n\t\t\treturn cutType == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/model/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children.getNode( index );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all of this element's children.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an index of the given child node. Returns `null` if given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's index in this element.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.getNodeIndex( node );\n\t}\n\n\t/**\n\t * Returns the starting offset of given child. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all node's siblings that are before it. Returns `null` if\n\t * given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's starting offset.\n\t */\n\tgetChildStartOffset( node ) {\n\t\treturn this._children.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Returns index of a node that occupies given offset. If given offset is too low, returns `0`. If given offset is\n\t * too high, returns {@link module:engine/model/element~Element#getChildIndex index after last child}.\n\t *\n\t *\t\tconst textNode = new Text( 'foo' );\n\t *\t\tconst pElement = new Element( 'p' );\n\t *\t\tconst divElement = new Element( [ textNode, pElement ] );\n\t *\t\tdivElement.offsetToIndex( -1 ); // Returns 0, because offset is too low.\n\t *\t\tdivElement.offsetToIndex( 0 ); // Returns 0, because offset 0 is taken by `textNode` which is at index 0.\n\t *\t\tdivElement.offsetToIndex( 1 ); // Returns 0, because `textNode` has `offsetSize` equal to 3, so it occupies offset 1 too.\n\t *\t\tdivElement.offsetToIndex( 2 ); // Returns 0.\n\t *\t\tdivElement.offsetToIndex( 3 ); // Returns 1.\n\t *\t\tdivElement.offsetToIndex( 4 ); // Returns 2. There are no nodes at offset 4, so last available index is returned.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number}\n\t */\n\toffsetToIndex( offset ) {\n\t\treturn this._children.offsetToIndex( offset );\n\t}\n\n\t/**\n\t * Returns a descendant node by its path relative to this element.\n\t *\n\t *\t\t// <this>a<b>c</b></this>\n\t *\t\tthis.getNodeByPath( [ 0 ] ); // -> \"a\"\n\t *\t\tthis.getNodeByPath( [ 1 ] ); // -> <b>\n\t *\t\tthis.getNodeByPath( [ 1, 0 ] ); // -> \"c\"\n\t *\n\t * @param {Array.<Number>} relativePath Path of the node to find, relative to this element.\n\t * @returns {module:engine/model/node~Node}\n\t */\n\tgetNodeByPath( relativePath ) {\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\tfor ( const index of relativePath ) {\n\t\t\tnode = node.getChild( node.offsetToIndex( index ) );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Converts `Element` instance to plain object and returns it. Takes care of converting all of this element's children.\n\t *\n\t * @returns {Object} `Element` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.name = this.name;\n\n\t\tif ( this._children.length > 0 ) {\n\t\t\tjson.children = [];\n\n\t\t\tfor ( const node of this._children ) {\n\t\t\t\tjson.children.push( node.toJSON() );\n\t\t\t}\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a copy of this element and returns it. Created element has the same name and attributes as the original element.\n\t * If clone is deep, the original element's children are also cloned. If not, then empty element is removed.\n\t *\n\t * @protected\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any child.\n\t */\n\t_clone( deep = false ) {\n\t\tconst children = deep ? Array.from( this._children ).map( node => node._clone( true ) ) : null;\n\n\t\treturn new Element( this.name, this.getAttributes(), children );\n\t}\n\n\t/**\n\t * {@link module:engine/model/element~Element#_insertChild Inserts} one or more nodes at the end of this element.\n\t *\n\t * @see module:engine/model/writer~Writer#append\n\t * @protected\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} nodes Nodes to be inserted.\n\t */\n\t_appendChild( nodes ) {\n\t\tthis._insertChild( this.childCount, nodes );\n\t}\n\n\t/**\n\t * Inserts one or more nodes at the given index and sets {@link module:engine/model/node~Node#parent parent} of these nodes\n\t * to this element.\n\t *\n\t * @see module:engine/model/writer~Writer#insert\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_insertChild( index, items ) {\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\t\t}\n\n\t\tthis._children._insertNodes( index, nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index and sets\n\t * {@link module:engine/model/node~Node#parent parent} of these nodes to `null`.\n\t *\n\t * @see module:engine/model/writer~Writer#remove\n\t * @protected\n\t * @param {Number} index Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tconst nodes = this._children._removeNodes( index, howMany );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tnode.parent = null;\n\t\t}\n\n\t\treturn nodes;\n\t}\n\n\t/**\n\t * Creates an `Element` instance from given plain object (i.e. parsed JSON string).\n\t * Converts `Element` children to proper nodes.\n\t *\n\t * @param {Object} json Plain object to be converted to `Element`.\n\t * @returns {module:engine/model/element~Element} `Element` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\tlet children = null;\n\n\t\tif ( json.children ) {\n\t\t\tchildren = [];\n\n\t\t\tfor ( const child of json.children ) {\n\t\t\t\tif ( child.name ) {\n\t\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn new Element( json.name, json.attributes, children );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `<${ this.rootName || this.name }>`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelElement: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelElement: ${ this }, ${ this.childCount } children,\n\t// @if CK_DEBUG_ENGINE //\t\tattrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logAll() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( '--------------------' );\n\t// @if CK_DEBUG_ENGINE //\n\t// @if CK_DEBUG_ENGINE // \tthis.logExtended();\n\t// @if CK_DEBUG_ENGINE //\tconsole.log( 'List of children:' );\n\t// @if CK_DEBUG_ENGINE //\n\t// @if CK_DEBUG_ENGINE // \tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE // \t\tchild.log();\n\t// @if CK_DEBUG_ENGINE // \t}\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // printTree( level = 0) {\n\t// @if CK_DEBUG_ENGINE // \tlet string = '';\n\n\t// @if CK_DEBUG_ENGINE // \tstring += '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE // \tstring += `<${ this.rootName || this.name }${ convertMapToTags( this.getAttributes() ) }>`;\n\n\t// @if CK_DEBUG_ENGINE // \tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE // \t\tstring += '\\n';\n\n\t// @if CK_DEBUG_ENGINE // \t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE // \t\t\tconst textAttrs = convertMapToTags( child._attrs );\n\n\t// @if CK_DEBUG_ENGINE // \t\t\tstring += '\\t'.repeat( level + 1 );\n\n\t// @if CK_DEBUG_ENGINE // \t\t\tif ( textAttrs !== '' ) {\n\t// @if CK_DEBUG_ENGINE // \t\t\t\tstring += `<$text${ textAttrs }>` + child.data + '</$text>';\n\t// @if CK_DEBUG_ENGINE // \t\t\t} else {\n\t// @if CK_DEBUG_ENGINE // \t\t\t\tstring += child.data;\n\t// @if CK_DEBUG_ENGINE // \t\t\t}\n\t// @if CK_DEBUG_ENGINE // \t\t} else {\n\t// @if CK_DEBUG_ENGINE // \t\t\tstring += child.printTree( level + 1 );\n\t// @if CK_DEBUG_ENGINE // \t\t}\n\t// @if CK_DEBUG_ENGINE // \t}\n\n\t// @if CK_DEBUG_ENGINE // \tif ( this.childCount ) {\n\t// @if CK_DEBUG_ENGINE // \t\tstring += '\\n' + '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE // \t}\n\n\t// @if CK_DEBUG_ENGINE // \tstring += `</${ this.rootName || this.name }>`;\n\n\t// @if CK_DEBUG_ENGINE // \treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/model/item~Item|Iterable.<String|module:engine/model/item~Item>}\n// @returns {Iterable.<module:engine/model/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data, node.getAttributes() );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/treewalker\n */\n\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport Element from './element';\nimport Position from './position';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Position iterator class. It allows to iterate forward and backward over the document.\n */\nexport default class TreeWalker {\n\t/**\n\t * Creates a range iterator. All parameters are optional, but you have to specify either `boundaries` or `startPosition`.\n\t *\n\t * @constructor\n\t * @param {Object} [options={}] Object with configuration.\n\t * @param {'forward'|'backward'} [options.direction='forward'] Walking direction.\n\t * @param {module:engine/model/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {module:engine/model/position~Position} [options.startPosition] Starting position.\n\t * @param {Boolean} [options.singleCharacters=false] Flag indicating whether all consecutive characters with the same attributes\n\t * should be returned one by one as multiple {@link module:engine/model/textproxy~TextProxy} (`true`) objects or as one\n\t * {@link module:engine/model/textproxy~TextProxy} (`false`).\n\t * @param {Boolean} [options.shallow=false] Flag indicating whether iterator should enter elements or not. If the\n\t * iterator is shallow child nodes of any iterated node will not be returned along with `elementEnd` tag.\n\t * @param {Boolean} [options.ignoreElementEnd=false] Flag indicating whether iterator should ignore `elementEnd`\n\t * tags. If the option is true walker will not return a parent node of start position. If this option is `true`\n\t * each {@link module:engine/model/element~Element} will be returned once, while if the option is `false` they might be returned\n\t * twice: for `'elementStart'` and `'elementEnd'`.\n\t */\n\tconstructor( options = {} ) {\n\t\tif ( !options.boundaries && !options.startPosition ) {\n\t\t\t/**\n\t\t\t * Neither boundaries nor starting position of a `TreeWalker` have been defined.\n\t\t\t *\n\t\t\t * @error model-tree-walker-no-start-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.',\n\t\t\t\tnull\n\t\t\t);\n\t\t}\n\n\t\tconst direction = options.direction || 'forward';\n\n\t\tif ( direction != 'forward' && direction != 'backward' ) {\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.',\n\t\t\t\toptions,\n\t\t\t\t{ direction }\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Walking direction. Defaults `'forward'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'backward'|'forward'} module:engine/model/treewalker~TreeWalker#direction\n\t\t */\n\t\tthis.direction = direction;\n\n\t\t/**\n\t\t * Iterator boundaries.\n\t\t *\n\t\t * When the iterator is walking `'forward'` on the end of boundary or is walking `'backward'`\n\t\t * on the start of boundary, then `{ done: true }` is returned.\n\t\t *\n\t\t * If boundaries are not defined they are set before first and after last child of the root node.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range} module:engine/model/treewalker~TreeWalker#boundaries\n\t\t */\n\t\tthis.boundaries = options.boundaries || null;\n\n\t\t/**\n\t\t * Iterator position. This is always static position, even if the initial position was a\n\t\t * {@link module:engine/model/liveposition~LivePosition live position}. If start position is not defined then position depends\n\t\t * on {@link #direction}. If direction is `'forward'` position starts form the beginning, when direction\n\t\t * is `'backward'` position starts from the end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position} module:engine/model/treewalker~TreeWalker#position\n\t\t */\n\t\tif ( options.startPosition ) {\n\t\t\tthis.position = options.startPosition.clone();\n\t\t} else {\n\t\t\tthis.position = Position._createAt( this.boundaries[ this.direction == 'backward' ? 'end' : 'start' ] );\n\t\t}\n\n\t\t// Reset position stickiness in case it was set to other value, as the stickiness is kept after cloning.\n\t\tthis.position.stickiness = 'toNone';\n\n\t\t/**\n\t\t * Flag indicating whether all consecutive characters with the same attributes should be\n\t\t * returned as one {@link module:engine/model/textproxy~TextProxy} (`true`) or one by one (`false`).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#singleCharacters\n\t\t */\n\t\tthis.singleCharacters = !!options.singleCharacters;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should enter elements or not. If the iterator is shallow child nodes of any\n\t\t * iterated node will not be returned along with `elementEnd` tag.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#shallow\n\t\t */\n\t\tthis.shallow = !!options.shallow;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should ignore `elementEnd` tags. If the option is true walker will not\n\t\t * return a parent node of the start position. If this option is `true` each {@link module:engine/model/element~Element} will\n\t\t * be returned once, while if the option is `false` they might be returned twice:\n\t\t * for `'elementStart'` and `'elementEnd'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#ignoreElementEnd\n\t\t */\n\t\tthis.ignoreElementEnd = !!options.ignoreElementEnd;\n\n\t\t/**\n\t\t * Start boundary cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element} module:engine/model/treewalker~TreeWalker#_boundaryStartParent\n\t\t */\n\t\tthis._boundaryStartParent = this.boundaries ? this.boundaries.start.parent : null;\n\n\t\t/**\n\t\t * End boundary cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element} module:engine/model/treewalker~TreeWalker#_boundaryEndParent\n\t\t */\n\t\tthis._boundaryEndParent = this.boundaries ? this.boundaries.end.parent : null;\n\n\t\t/**\n\t\t * Parent of the most recently visited node. Cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t\t * module:engine/model/treewalker~TreeWalker#_visitedParent\n\t\t */\n\t\tthis._visitedParent = this.position.parent;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:engine/model/treewalker~TreeWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves {@link #position} in the {@link #direction} skipping values as long as the callback function returns `true`.\n\t *\n\t * For example:\n\t *\n\t * \t\twalker.skip( value => value.type == 'text' ); // <paragraph>[]foo</paragraph> -> <paragraph>foo[]</paragraph>\n\t * \t\twalker.skip( () => true ); // Move the position to the end: <paragraph>[]foo</paragraph> -> <paragraph>foo</paragraph>[]\n\t * \t\twalker.skip( () => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/model/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t */\n\tskip( skip ) {\n\t\tlet done, value, prevPosition, prevVisitedParent;\n\n\t\tdo {\n\t\t\tprevPosition = this.position;\n\t\t\tprevVisitedParent = this._visitedParent;\n\n\t\t\t( { done, value } = this.next() );\n\t\t} while ( !done && skip( value ) );\n\n\t\tif ( !done ) {\n\t\t\tthis.position = prevPosition;\n\t\t\tthis._visitedParent = prevVisitedParent;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the next tree walker's value.\n\t *\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} Next tree walker's value.\n\t */\n\tnext() {\n\t\tif ( this.direction == 'forward' ) {\n\t\t\treturn this._next();\n\t\t} else {\n\t\t\treturn this._previous();\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step forward in model. Moves the {@link #position} to the next position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_next() {\n\t\tconst previousPosition = this.position;\n\t\tconst position = this.position.clone();\n\t\tconst parent = this._visitedParent;\n\n\t\t// We are at the end of the root.\n\t\tif ( parent.parent === null && position.offset === parent.maxOffset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent === this._boundaryEndParent && position.offset == this.boundaries.end.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\tconst node = position.textNode ? position.textNode : position.nodeAfter;\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\t// Manual operations on path internals for optimization purposes. Here and in the rest of the method.\n\t\t\t\tposition.path.push( 0 );\n\t\t\t\tthis._visitedParent = node;\n\t\t\t} else {\n\t\t\t\tposition.offset++;\n\t\t\t}\n\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t} else if ( node instanceof Text ) {\n\t\t\tlet charactersCount;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tcharactersCount = 1;\n\t\t\t} else {\n\t\t\t\tlet offset = node.endOffset;\n\n\t\t\t\tif ( this._boundaryEndParent == parent && this.boundaries.end.offset < offset ) {\n\t\t\t\t\toffset = this.boundaries.end.offset;\n\t\t\t\t}\n\n\t\t\t\tcharactersCount = offset - position.offset;\n\t\t\t}\n\n\t\t\tconst offsetInTextNode = position.offset - node.startOffset;\n\t\t\tconst item = new TextProxy( node, offsetInTextNode, charactersCount );\n\n\t\t\tposition.offset += charactersCount;\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the end of current `parent`.\n\t\t\tposition.path.pop();\n\t\t\tposition.offset++;\n\t\t\tthis.position = position;\n\t\t\tthis._visitedParent = parent.parent;\n\n\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\treturn formatReturnValue( 'elementEnd', parent, previousPosition, position );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step backward in model. Moves the {@link #position} to the previous position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_previous() {\n\t\tconst previousPosition = this.position;\n\t\tconst position = this.position.clone();\n\t\tconst parent = this._visitedParent;\n\n\t\t// We are at the beginning of the root.\n\t\tif ( parent.parent === null && position.offset === 0 ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent == this._boundaryStartParent && position.offset == this.boundaries.start.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just before current position\n\t\tconst node = position.textNode ? position.textNode : position.nodeBefore;\n\n\t\tif ( node instanceof Element ) {\n\t\t\tposition.offset--;\n\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition.path.push( node.maxOffset );\n\t\t\t\tthis.position = position;\n\t\t\t\tthis._visitedParent = node;\n\n\t\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\t\treturn this._previous();\n\t\t\t\t} else {\n\t\t\t\t\treturn formatReturnValue( 'elementEnd', node, previousPosition, position );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t\t}\n\t\t} else if ( node instanceof Text ) {\n\t\t\tlet charactersCount;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tcharactersCount = 1;\n\t\t\t} else {\n\t\t\t\tlet offset = node.startOffset;\n\n\t\t\t\tif ( this._boundaryStartParent == parent && this.boundaries.start.offset > offset ) {\n\t\t\t\t\toffset = this.boundaries.start.offset;\n\t\t\t\t}\n\n\t\t\t\tcharactersCount = position.offset - offset;\n\t\t\t}\n\n\t\t\tconst offsetInTextNode = position.offset - node.startOffset;\n\t\t\tconst item = new TextProxy( node, offsetInTextNode - charactersCount, charactersCount );\n\n\t\t\tposition.offset -= charactersCount;\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the beginning of current `parent`.\n\t\t\tposition.path.pop();\n\t\t\tthis.position = position;\n\t\t\tthis._visitedParent = parent.parent;\n\n\t\t\treturn formatReturnValue( 'elementStart', parent, previousPosition, position, 1 );\n\t\t}\n\t}\n}\n\nfunction formatReturnValue( type, item, previousPosition, nextPosition, length ) {\n\treturn {\n\t\tdone: false,\n\t\tvalue: {\n\t\t\ttype,\n\t\t\titem,\n\t\t\tpreviousPosition,\n\t\t\tnextPosition,\n\t\t\tlength\n\t\t}\n\t};\n}\n\n/**\n * Type of the step made by {@link module:engine/model/treewalker~TreeWalker}.\n * Possible values: `'elementStart'` if walker is at the beginning of a node, `'elementEnd'` if walker is at the end of node,\n * `'character'` if walker traversed over a character, or `'text'` if walker traversed over multiple characters (available in\n * character merging mode, see {@link module:engine/model/treewalker~TreeWalker#constructor}).\n *\n * @typedef {'elementStart'|'elementEnd'|'character'|'text'} module:engine/model/treewalker~TreeWalkerValueType\n */\n\n/**\n * Object returned by {@link module:engine/model/treewalker~TreeWalker} when traversing tree model.\n *\n * @typedef {Object} module:engine/model/treewalker~TreeWalkerValue\n * @property {module:engine/model/treewalker~TreeWalkerValueType} type\n * @property {module:engine/model/item~Item} item Item between old and new positions of {@link module:engine/model/treewalker~TreeWalker}.\n * @property {module:engine/model/position~Position} previousPosition Previous position of the iterator.\n * * Forward iteration: For `'elementEnd'` it is the last position inside the element. For all other types it is the\n * position before the item.\n * * Backward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after item.\n * @property {module:engine/model/position~Position} nextPosition Next position of the iterator.\n * * Forward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after the item.\n * * Backward iteration: For `'elementEnd'` it is last position inside element. For all other types it is the position\n * before the item.\n * @property {Number} [length] Length of the item. For `'elementStart'` and `'character'` it is 1. For `'text'` it is\n * the length of the text. For `'elementEnd'` it is `undefined`.\n */\n\n/**\n * Tree walking directions.\n *\n * @typedef {'forward'|'backward'} module:engine/view/treewalker~TreeWalkerDirection\n */\n","/**\n * Gets the last element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {*} Returns the last element of `array`.\n * @example\n *\n * _.last([1, 2, 3]);\n * // => 3\n */\nfunction last(array) {\n var length = array == null ? 0 : array.length;\n return length ? array[length - 1] : undefined;\n}\n\nexport default last;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/position\n */\n\nimport TreeWalker from './treewalker';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Text from './text';\nimport { last } from 'lodash-es';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Represents a position in the model tree.\n *\n * A position is represented by its {@link module:engine/model/position~Position#root} and\n * a {@link module:engine/model/position~Position#path} in that root.\n *\n * You can create position instances via its constructor or the `createPosition*()` factory methods of\n * {@link module:engine/model/model~Model} and {@link module:engine/model/writer~Writer}.\n *\n * **Note:** Position is based on offsets, not indexes. This means that a position between two text nodes\n * `foo` and `bar` has offset `3`, not `1`. See {@link module:engine/model/position~Position#path} for more information.\n *\n * Since a position in the model is represented by a {@link module:engine/model/position~Position#root position root} and\n * {@link module:engine/model/position~Position#path position path} it is possible to create positions placed in non-existing places.\n * This requirement is important for operational transformation algorithms.\n *\n * Also, {@link module:engine/model/operation/operation~Operation operations}\n * kept in the {@link module:engine/model/document~Document#history document history}\n * are storing positions (and ranges) which were correct when those operations were applied, but may not be correct\n * after the document has changed.\n *\n * When changes are applied to the model, it may also happen that {@link module:engine/model/position~Position#parent position parent}\n * will change even if position path has not changed. Keep in mind, that if a position leads to non-existing element,\n * {@link module:engine/model/position~Position#parent} and some other properties and methods will throw errors.\n *\n * In most cases, position with wrong path is caused by an error in code, but it is sometimes needed, as described above.\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t */\n\tconstructor( root, path, stickiness = 'toNone' ) {\n\t\tif ( !root.is( 'element' ) && !root.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * Position root is invalid.\n\t\t\t *\n\t\t\t * Positions can only be anchored in elements or document fragments.\n\t\t\t *\n\t\t\t * @error model-position-root-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-root-invalid: Position root invalid.',\n\t\t\t\troot\n\t\t\t);\n\t\t}\n\n\t\tif ( !( path instanceof Array ) || path.length === 0 ) {\n\t\t\t/**\n\t\t\t * Position path must be an array with at least one item.\n\t\t\t *\n\t\t\t * @error model-position-path-incorrect-format\n\t\t\t * @param path\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-path-incorrect-format: Position path must be an array with at least one item.',\n\t\t\t\troot,\n\t\t\t\t{ path }\n\t\t\t);\n\t\t}\n\n\t\t// Normalize the root and path (if element was passed).\n\t\tpath = root.getPath().concat( path );\n\t\troot = root.root;\n\n\t\t/**\n\t\t * Root of the position path.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t\t * module:engine/model/position~Position#root\n\t\t */\n\t\tthis.root = root;\n\n\t\t/**\n\t\t * Position of the node in the tree. **Path contains offsets, not indexes.**\n\t\t *\n\t\t * Position can be placed before, after or in a {@link module:engine/model/node~Node node} if that node has\n\t\t * {@link module:engine/model/node~Node#offsetSize} greater than `1`. Items in position path are\n\t\t * {@link module:engine/model/node~Node#startOffset starting offsets} of position ancestors, starting from direct root children,\n\t\t * down to the position offset in it's parent.\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P before: [ 0 ] after: [ 1 ]\n\t\t *\t\t |- UL before: [ 1 ] after: [ 2 ]\n\t\t *\t\t |- LI before: [ 1, 0 ] after: [ 1, 1 ]\n\t\t *\t\t | |- foo before: [ 1, 0, 0 ] after: [ 1, 0, 3 ]\n\t\t *\t\t |- LI before: [ 1, 1 ] after: [ 1, 2 ]\n\t\t *\t\t |- bar before: [ 1, 1, 0 ] after: [ 1, 1, 3 ]\n\t\t *\n\t\t * `foo` and `bar` are representing {@link module:engine/model/text~Text text nodes}. Since text nodes has offset size\n\t\t * greater than `1` you can place position offset between their start and end:\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P\n\t\t *\t\t |- UL\n\t\t *\t\t |- LI\n\t\t *\t\t | |- f^o|o ^ has path: [ 1, 0, 1 ] | has path: [ 1, 0, 2 ]\n\t\t *\t\t |- LI\n\t\t *\t\t |- b^a|r ^ has path: [ 1, 1, 1 ] | has path: [ 1, 1, 2 ]\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<Number>} module:engine/model/position~Position#path\n\t\t */\n\t\tthis.path = path;\n\n\t\t/**\n\t\t * Position stickiness. See {@link module:engine/model/position~PositionStickiness}.\n\t\t *\n\t\t * @member {module:engine/model/position~PositionStickiness} module:engine/model/position~Position#stickiness\n\t\t */\n\t\tthis.stickiness = stickiness;\n\t}\n\n\t/**\n\t * Offset at which this position is located in its {@link module:engine/model/position~Position#parent parent}. It is equal\n\t * to the last item in position {@link module:engine/model/position~Position#path path}.\n\t *\n\t * @type {Number}\n\t */\n\tget offset() {\n\t\treturn last( this.path );\n\t}\n\n\t/**\n\t * @param {Number} newOffset\n\t */\n\tset offset( newOffset ) {\n\t\tthis.path[ this.path.length - 1 ] = newOffset;\n\t}\n\n\t/**\n\t * Parent element of this position.\n\t *\n\t * Keep in mind that `parent` value is calculated when the property is accessed.\n\t * If {@link module:engine/model/position~Position#path position path}\n\t * leads to a non-existing element, `parent` property will throw error.\n\t *\n\t * Also it is a good idea to cache `parent` property if it is used frequently in an algorithm (i.e. in a long loop).\n\t *\n\t * @readonly\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget parent() {\n\t\tlet parent = this.root;\n\n\t\tfor ( let i = 0; i < this.path.length - 1; i++ ) {\n\t\t\tparent = parent.getChild( parent.offsetToIndex( this.path[ i ] ) );\n\n\t\t\tif ( !parent ) {\n\t\t\t\tthrow new CKEditorError( 'model-position-path-incorrect: The position\\'s path is incorrect.', this, { position: this } );\n\t\t\t}\n\t\t}\n\n\t\tif ( parent.is( 'text' ) ) {\n\t\t\t/**\n\t\t\t * The position's path is incorrect. This means that a position does not point to\n\t\t\t * a correct place in the tree and hence, some of its methods and getters cannot work correctly.\n\t\t\t *\n\t\t\t * **Note**: Unlike DOM and view positions, in the model, the\n\t\t\t * {@link module:engine/model/position~Position#parent position's parent} is always an element or a document fragment.\n\t\t\t * The last offset in the {@link module:engine/model/position~Position#path position's path} is the point in this element where\n\t\t\t * this position points.\n\t\t\t *\n\t\t\t * Read more about model positions and offsets in\n\t\t\t * the {@glink framework/guides/architecture/editing-engine#indexes-and-offsets Editing engine architecture guide}.\n\t\t\t *\n\t\t\t * @error position-incorrect-path\n\t\t\t * @param {module:engine/model/position~Position} position The incorrect position.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-path-incorrect: The position\\'s path is incorrect.', this, { position: this } );\n\t\t}\n\n\t\treturn parent;\n\t}\n\n\t/**\n\t * Position {@link module:engine/model/position~Position#offset offset} converted to an index in position's parent node. It is\n\t * equal to the {@link module:engine/model/node~Node#index index} of a node after this position. If position is placed\n\t * in text node, position index is equal to the index of that text node.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget index() {\n\t\treturn this.parent.offsetToIndex( this.offset );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/model/text~Text text node} instance in which this position is placed or `null` if this\n\t * position is not in a text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/text~Text|null}\n\t */\n\tget textNode() {\n\t\tconst node = this.parent.getChild( this.index );\n\n\t\treturn ( node instanceof Text && node.startOffset < this.offset ) ? node : null;\n\t}\n\n\t/**\n\t * Node directly after this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index ) : null;\n\t}\n\n\t/**\n\t * Node directly before this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {Node}\n\t */\n\tget nodeBefore() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index - 1 ) : null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\treturn this.offset == this.parent.maxOffset;\n\t}\n\n\t/**\n\t * Checks whether this position is before or after given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/model/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.root != otherPosition.root ) {\n\t\t\treturn 'different';\n\t\t}\n\n\t\tconst result = compareArrays( this.path, otherPosition.path );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'same':\n\t\t\t\treturn 'same';\n\n\t\t\tcase 'prefix':\n\t\t\t\treturn 'before';\n\n\t\t\tcase 'extension':\n\t\t\t\treturn 'after';\n\n\t\t\tdefault:\n\t\t\t\treturn this.path[ result ] < otherPosition.path[ result ] ? 'before' : 'after';\n\t\t}\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/model/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' );\n\t * \t\t// <paragraph>[]foo</paragraph> -> <paragraph>foo[]</paragraph>\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } );\n\t * \t\t// <paragraph>foo[]</paragraph> -> <paragraph>[]foo</paragraph>\n\t *\n\t * \t\tgetLastMatchingPosition( value => false );\n\t * \t\t// Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/model/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/model/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns a path to this position's parent. Parent path is equal to position {@link module:engine/model/position~Position#path path}\n\t * but without the last item.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @returns {Array.<Number>} Path to the parent.\n\t */\n\tgetParentPath() {\n\t\treturn this.path.slice( 0, -1 );\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and its ancestors.\n\t *\n\t * @returns {Array.<module:engine/model/item~Item>} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the slice of two position {@link #path paths} which is identical. The {@link #root roots}\n\t * of these two paths must be identical.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {Array.<Number>} The common path.\n\t */\n\tgetCommonPath( position ) {\n\t\tif ( this.root != position.root ) {\n\t\t\treturn [];\n\t\t}\n\n\t\t// We find on which tree-level start and end have the lowest common ancestor\n\t\tconst cmp = compareArrays( this.path, position.path );\n\t\t// If comparison returned string it means that arrays are same.\n\t\tconst diffAt = ( typeof cmp == 'string' ) ? Math.min( this.path.length, position.path.length ) : cmp;\n\n\t\treturn this.path.slice( 0, diffAt );\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions. The {@link #root roots} of these two positions must be identical.\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns a new instance of `Position`, that has same {@link #parent parent} but it's offset\n\t * is shifted by `shift` value (can be a negative value).\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {Number} shift Offset shift. Can be a negative value.\n\t * @returns {module:engine/model/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = this.clone();\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Checks whether this position is after given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @see module:engine/model/position~Position#isBefore\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before given position.\n\t *\n\t * **Note:** watch out when using negation of the value returned by this method, because the negation will also\n\t * be `true` if positions are in different roots and you might not expect this. You should probably use\n\t * `a.isAfter( b ) || a.isEqual( b )` or `!a.isBefore( p ) && a.root == b.root` in most scenarios. If your\n\t * condition uses multiple `isAfter` and `isBefore` checks, build them so they do not use negated values, i.e.:\n\t *\n\t *\t\tif ( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do A.\n\t *\t\t} else {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * or, if you have only one if-branch:\n\t *\n\t *\t\tif ( !( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * rather than:\n\t *\n\t *\t\tif ( !a.isBefore( b ) || && !c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t} else {\n\t *\t\t\t// do A.\n\t *\t\t}\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is equal to given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'same';\n\t}\n\n\t/**\n\t * Checks whether this position is touching given position. Positions touch when there are no text nodes\n\t * or empty nodes in a range between them. Technically, those positions are not equal but in many cases\n\t * they are very similar or even indistinguishable.\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions touch.\n\t */\n\tisTouching( otherPosition ) {\n\t\tlet left = null;\n\t\tlet right = null;\n\t\tconst compare = this.compareWith( otherPosition );\n\n\t\tswitch ( compare ) {\n\t\t\tcase 'same':\n\t\t\t\treturn true;\n\n\t\t\tcase 'before':\n\t\t\t\tleft = Position._createAt( this );\n\t\t\t\tright = Position._createAt( otherPosition );\n\t\t\t\tbreak;\n\n\t\t\tcase 'after':\n\t\t\t\tleft = Position._createAt( otherPosition );\n\t\t\t\tright = Position._createAt( this );\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\treturn false;\n\t\t}\n\n\t\t// Cached for optimization purposes.\n\t\tlet leftParent = left.parent;\n\n\t\twhile ( left.path.length + right.path.length ) {\n\t\t\tif ( left.isEqual( right ) ) {\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\tif ( left.path.length > right.path.length ) {\n\t\t\t\tif ( left.offset !== leftParent.maxOffset ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tleft.path = left.path.slice( 0, -1 );\n\t\t\t\tleftParent = leftParent.parent;\n\t\t\t\tleft.offset++;\n\t\t\t} else {\n\t\t\t\tif ( right.offset !== 0 ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tright.path = right.path.slice( 0, -1 );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tposition.is( 'position' ); // -> true\n\t *\t\tposition.is( 'model:position' ); // -> true\n\t *\n\t *\t\tposition.is( 'view:position' ); // -> false\n\t *\t\tposition.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'position' || type == 'model:position';\n\t}\n\n\t/**\n\t * Checks if two positions are in the same parent.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} position Position to compare with.\n\t * @returns {Boolean} `true` if positions have the same parent, `false` otherwise.\n\t */\n\thasSameParentAs( position ) {\n\t\tif ( this.root !== position.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisParentPath = this.getParentPath();\n\t\tconst posParentPath = position.getParentPath();\n\n\t\treturn compareArrays( thisParentPath, posParentPath ) == 'same';\n\t}\n\n\t/**\n\t * Returns a copy of this position that is transformed by given `operation`.\n\t *\n\t * The new position's parameters are updated accordingly to the effect of the `operation`.\n\t *\n\t * For example, if `n` nodes are inserted before the position, the returned position {@link ~Position#offset} will be\n\t * increased by `n`. If the position was in a merged element, it will be accordingly moved to the new element, etc.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to transform by.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\tgetTransformedByOperation( operation ) {\n\t\tlet result;\n\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert':\n\t\t\t\tresult = this._getTransformedByInsertOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'move':\n\t\t\tcase 'remove':\n\t\t\tcase 'reinsert':\n\t\t\t\tresult = this._getTransformedByMoveOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'split':\n\t\t\t\tresult = this._getTransformedBySplitOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'merge':\n\t\t\t\tresult = this._getTransformedByMergeOperation( operation );\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tresult = Position._createAt( this );\n\t\t\t\tbreak;\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by an insert operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/insertoperation~InsertOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByInsertOperation( operation ) {\n\t\treturn this._getTransformedByInsertion( operation.position, operation.howMany );\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by a move operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/moveoperation~MoveOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByMoveOperation( operation ) {\n\t\treturn this._getTransformedByMove( operation.sourcePosition, operation.targetPosition, operation.howMany );\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by a split operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/splitoperation~SplitOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedBySplitOperation( operation ) {\n\t\tconst movedRange = operation.movedRange;\n\n\t\tconst isContained = movedRange.containsPosition( this ) ||\n\t\t\t( movedRange.start.isEqual( this ) && this.stickiness == 'toNext' );\n\n\t\tif ( isContained ) {\n\t\t\treturn this._getCombined( operation.splitPosition, operation.moveTargetPosition );\n\t\t} else {\n\t\t\tif ( operation.graveyardPosition ) {\n\t\t\t\treturn this._getTransformedByMove( operation.graveyardPosition, operation.insertionPosition, 1 );\n\t\t\t} else {\n\t\t\t\treturn this._getTransformedByInsertion( operation.insertionPosition, 1 );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by merge operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/mergeoperation~MergeOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByMergeOperation( operation ) {\n\t\tconst movedRange = operation.movedRange;\n\t\tconst isContained = movedRange.containsPosition( this ) || movedRange.start.isEqual( this );\n\n\t\tlet pos;\n\n\t\tif ( isContained ) {\n\t\t\tpos = this._getCombined( operation.sourcePosition, operation.targetPosition );\n\n\t\t\tif ( operation.sourcePosition.isBefore( operation.targetPosition ) ) {\n\t\t\t\t// Above happens during OT when the merged element is moved before the merged-to element.\n\t\t\t\tpos = pos._getTransformedByDeletion( operation.deletionPosition, 1 );\n\t\t\t}\n\t\t} else if ( this.isEqual( operation.deletionPosition ) ) {\n\t\t\tpos = Position._createAt( operation.deletionPosition );\n\t\t} else {\n\t\t\tpos = this._getTransformedByMove( operation.deletionPosition, operation.graveyardPosition, 1 );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by removing `howMany` nodes starting from `deletePosition`.\n\t * It may happen that this position is in a removed node. If that is the case, `null` is returned instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} deletePosition Position before the first removed node.\n\t * @param {Number} howMany How many nodes are removed.\n\t * @returns {module:engine/model/position~Position|null} Transformed position or `null`.\n\t */\n\t_getTransformedByDeletion( deletePosition, howMany ) {\n\t\tconst transformed = Position._createAt( this );\n\n\t\t// This position can't be affected if deletion was in a different root.\n\t\tif ( this.root != deletePosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are removed from the node that is pointed by this position...\n\t\t\tif ( deletePosition.offset < this.offset ) {\n\t\t\t\t// And are removed from before an offset of that position...\n\t\t\t\tif ( deletePosition.offset + howMany > this.offset ) {\n\t\t\t\t\t// Position is in removed range, it's no longer in the tree.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Decrement the offset accordingly.\n\t\t\t\t\ttransformed.offset -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t} else if ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are removed from a node that is on a path to this position...\n\t\t\tconst i = deletePosition.path.length - 1;\n\n\t\t\tif ( deletePosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are removed from before next node of that path...\n\t\t\t\tif ( deletePosition.offset + howMany > this.path[ i ] ) {\n\t\t\t\t\t// If the next node of that path is removed return null\n\t\t\t\t\t// because the node containing this position got removed.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, decrement index on that path.\n\t\t\t\t\ttransformed.path[ i ] -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by inserting `howMany` nodes at `insertPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany ) {\n\t\tconst transformed = Position._createAt( this );\n\n\t\t// This position can't be affected if insertion was in a different root.\n\t\tif ( this.root != insertPosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are inserted in the node that is pointed by this position...\n\t\t\tif ( insertPosition.offset < this.offset || ( insertPosition.offset == this.offset && this.stickiness != 'toPrevious' ) ) {\n\t\t\t\t// And are inserted before an offset of that position...\n\t\t\t\t// \"Push\" this positions offset.\n\t\t\t\ttransformed.offset += howMany;\n\t\t\t}\n\t\t} else if ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are inserted in a node that is on a path to this position...\n\t\t\tconst i = insertPosition.path.length - 1;\n\n\t\t\tif ( insertPosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are inserted before next node of that path...\n\t\t\t\t// \"Push\" the index on that path.\n\t\t\t\ttransformed.path[ i ] += howMany;\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position before the first element to move.\n\t * @param {module:engine/model/position~Position} targetPosition Position where moved elements will be inserted.\n\t * @param {Number} howMany How many consecutive nodes to move, starting from `sourcePosition`.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany ) {\n\t\t// Update target position, as it could be affected by nodes removal.\n\t\ttargetPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( sourcePosition.isEqual( targetPosition ) ) {\n\t\t\t// If `targetPosition` is equal to `sourcePosition` this isn't really any move. Just return position as it is.\n\t\t\treturn Position._createAt( this );\n\t\t}\n\n\t\t// Moving a range removes nodes from their original position. We acknowledge this by proper transformation.\n\t\tconst transformed = this._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tconst isMoved = transformed === null ||\n\t\t\t( sourcePosition.isEqual( this ) && this.stickiness == 'toNext' ) ||\n\t\t\t( sourcePosition.getShiftedBy( howMany ).isEqual( this ) && this.stickiness == 'toPrevious' );\n\n\t\tif ( isMoved ) {\n\t\t\t// This position is inside moved range (or sticks to it).\n\t\t\t// In this case, we calculate a combination of this position, move source position and target position.\n\t\t\treturn this._getCombined( sourcePosition, targetPosition );\n\t\t} else {\n\t\t\t// This position is not inside a removed range.\n\t\t\t//\n\t\t\t// In next step, we simply reflect inserting `howMany` nodes, which might further affect the position.\n\t\t\treturn transformed._getTransformedByInsertion( targetPosition, howMany );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a new position that is a combination of this position and given positions.\n\t *\n\t * The combined position is a copy of this position transformed by moving a range starting at `source` position\n\t * to the `target` position. It is expected that this position is inside the moved range.\n\t *\n\t * Example:\n\t *\n\t *\t\tlet original = model.createPositionFromPath( root, [ 2, 3, 1 ] );\n\t *\t\tlet source = model.createPositionFromPath( root, [ 2, 2 ] );\n\t *\t\tlet target = model.createPositionFromPath( otherRoot, [ 1, 1, 3 ] );\n\t *\t\toriginal._getCombined( source, target ); // path is [ 1, 1, 4, 1 ], root is `otherRoot`\n\t *\n\t * Explanation:\n\t *\n\t * We have a position `[ 2, 3, 1 ]` and move some nodes from `[ 2, 2 ]` to `[ 1, 1, 3 ]`. The original position\n\t * was inside moved nodes and now should point to the new place. The moved nodes will be after\n\t * positions `[ 1, 1, 3 ]`, `[ 1, 1, 4 ]`, `[ 1, 1, 5 ]`. Since our position was in the second moved node,\n\t * the transformed position will be in a sub-tree of a node at `[ 1, 1, 4 ]`. Looking at original path, we\n\t * took care of `[ 2, 3 ]` part of it. Now we have to add the rest of the original path to the transformed path.\n\t * Finally, the transformed position will point to `[ 1, 1, 4, 1 ]`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} source Beginning of the moved range.\n\t * @param {module:engine/model/position~Position} target Position where the range is moved.\n\t * @returns {module:engine/model/position~Position} Combined position.\n\t */\n\t_getCombined( source, target ) {\n\t\tconst i = source.path.length - 1;\n\n\t\t// The first part of a path to combined position is a path to the place where nodes were moved.\n\t\tconst combined = Position._createAt( target );\n\t\tcombined.stickiness = this.stickiness;\n\n\t\t// Then we have to update the rest of the path.\n\n\t\t// Fix the offset because this position might be after `from` position and we have to reflect that.\n\t\tcombined.offset = combined.offset + this.path[ i ] - source.offset;\n\n\t\t// Then, add the rest of the path.\n\t\t// If this position is at the same level as `from` position nothing will get added.\n\t\tcombined.path = combined.path.concat( this.path.slice( i + 1 ) );\n\n\t\treturn combined;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\treturn {\n\t\t\troot: this.root.toJSON(),\n\t\t\tpath: Array.from( this.path ),\n\t\t\tstickiness: this.stickiness\n\t\t};\n\t}\n\n\t/**\n\t * Returns a new position that is equal to current position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.root, this.path, this.stickiness );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/model/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/model/item~Item model item} and `'before'` or `'after'` (sets position before or after given model item).\n\t *\n\t * This method is a shortcut to other factory methods such as:\n\t *\n\t * * {@link module:engine/model/position~Position._createBefore},\n\t * * {@link module:engine/model/position~Position._createAfter}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when the\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness. Used only when the\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @protected\n\t */\n\tstatic _createAt( itemOrPosition, offset, stickiness = 'toNone' ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn new Position( itemOrPosition.root, itemOrPosition.path, itemOrPosition.stickiness );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.maxOffset;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this._createBefore( node, stickiness );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this._createAfter( node, stickiness );\n\t\t\t} else if ( offset !== 0 && !offset ) {\n\t\t\t\t/**\n\t\t\t\t * {@link module:engine/model/model~Model#createPositionAt `Model#createPositionAt()`}\n\t\t\t\t * requires the offset to be specified when the first parameter is a model item.\n\t\t\t\t *\n\t\t\t\t * @error model-createPositionAt-offset-required\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-createPositionAt-offset-required: ' +\n\t\t\t\t\t'Model#createPositionAt() requires the offset when the first parameter is a model item.',\n\t\t\t\t\t[ this, itemOrPosition ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( !node.is( 'element' ) && !node.is( 'documentFragment' ) ) {\n\t\t\t\t/**\n\t\t\t\t * Position parent have to be a model element or model document fragment.\n\t\t\t\t *\n\t\t\t\t * @error model-position-parent-incorrect\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-position-parent-incorrect: Position parent have to be a element or document fragment.',\n\t\t\t\t\t[ this, itemOrPosition ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tconst path = node.getPath();\n\n\t\t\tpath.push( offset );\n\n\t\t\treturn new this( node.root, path, stickiness );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position, after given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * @returns {module:engine/model/position~Position}\n\t * @protected\n\t */\n\tstatic _createAfter( item, stickiness ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root element.\n\t\t\t *\n\t\t\t * @error model-position-after-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-after-root: You cannot make a position after root.',\n\t\t\t\t[ this, item ],\n\t\t\t\t{ root: item }\n\t\t\t);\n\t\t}\n\n\t\treturn this._createAt( item.parent, item.endOffset, stickiness );\n\t}\n\n\t/**\n\t * Creates a new position, before the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item before which the position should be placed.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * @returns {module:engine/model/position~Position}\n\t * @protected\n\t */\n\tstatic _createBefore( item, stickiness ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position before a root element.\n\t\t\t *\n\t\t\t * @error model-position-before-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-before-root: You cannot make a position before root.',\n\t\t\t\titem,\n\t\t\t\t{ root: item }\n\t\t\t);\n\t\t}\n\n\t\treturn this._createAt( item.parent, item.startOffset, stickiness );\n\t}\n\n\t/**\n\t * Creates a `Position` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Position`.\n\t * @param {module:engine/model/document~Document} doc Document object that will be position owner.\n\t * @returns {module:engine/model/position~Position} `Position` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\tif ( json.root === '$graveyard' ) {\n\t\t\tconst pos = new Position( doc.graveyard, json.path );\n\t\t\tpos.stickiness = json.stickiness;\n\n\t\t\treturn pos;\n\t\t}\n\n\t\tif ( !doc.getRoot( json.root ) ) {\n\t\t\t/**\n\t\t\t * Cannot create position for document. Root with specified name does not exist.\n\t\t\t *\n\t\t\t * @error model-position-fromjson-no-root\n\t\t\t * @param {String} rootName\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-fromjson-no-root: Cannot create position for document. Root with specified name does not exist.',\n\t\t\t\tdoc,\n\t\t\t\t{ rootName: json.root }\n\t\t\t);\n\t\t}\n\n\t\treturn new Position( doc.getRoot( json.root ), json.path, json.stickiness );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `${ this.root } [ ${ this.path.join( ', ' ) } ]`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelPosition: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/model/position~PositionRelation\n */\n\n/**\n * Represents how position is \"sticking\" with neighbour nodes. Used to define how position should be transformed (moved)\n * in edge cases. Possible values: `'toNone'`, `'toNext'`, `'toPrevious'`.\n *\n * Examples:\n *\n *\t\tInsert. Position is at | and nodes are inserted at the same position, marked as ^:\n *\n *\t\t- sticks to none: <p>f^|oo</p> -> <p>fbar|oo</p>\n *\t\t- sticks to next node: <p>f^|oo</p> -> <p>fbar|oo</p>\n *\t\t- sticks to previous node: <p>f|^oo</p> -> <p>f|baroo</p>\n *\n *\n *\t\tMove. Position is at | and range [oo] is moved to position ^:\n *\n *\t\t- sticks to none: <p>f|[oo]</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\t\t- sticks to none: <p>f[oo]|</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\n *\t\t- sticks to next node: <p>f|[oo]</p><p>b^ar</p> -> <p>f</p><p>b|ooar</p>\n *\t\t- sticks to next node: <p>f[oo]|</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\n *\t\t- sticks to previous node: <p>f|[oo]</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\t\t- sticks to previous node: <p>f[oo]|</p><p>b^ar</p> -> <p>f</p><p>boo|ar</p>\n *\n * @typedef {String} module:engine/model/position~PositionStickiness\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/range\n */\n\nimport Position from './position';\nimport TreeWalker from './treewalker';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\n/**\n * Represents a range in the model tree.\n *\n * A range is defined by its {@link module:engine/model/range~Range#start} and {@link module:engine/model/range~Range#end}\n * positions.\n *\n * You can create range instances via its constructor or the `createRange*()` factory methods of\n * {@link module:engine/model/model~Model} and {@link module:engine/model/writer~Writer}.\n */\nexport default class Range {\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t */\n\tconstructor( start, end = null ) {\n\t\t/**\n\t\t * Start position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.start = Position._createAt( start );\n\n\t\t/**\n\t\t * End position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.end = end ? Position._createAt( end ) : Position._createAt( start );\n\n\t\t// If the range is collapsed, treat in a similar way as a position and set its boundaries stickiness to 'toNone'.\n\t\t// In other case, make the boundaries stick to the \"inside\" of the range.\n\t\tthis.start.stickiness = this.isCollapsed ? 'toNone' : 'toNext';\n\t\tthis.end.stickiness = this.isCollapsed ? 'toNone' : 'toPrevious';\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them together with additional information like length or {@link module:engine/model/position~Position positions},\n\t * grouped as {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t * It iterates over all {@link module:engine/model/textproxy~TextProxy text contents} that are inside the range\n\t * and all the {@link module:engine/model/element~Element}s that are entered into when iterating over this range.\n\t *\n\t * This iterator uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range\n\t * and `ignoreElementEnd` option set to `true`.\n\t *\n\t * @returns {Iterable.<module:engine/model/treewalker~TreeWalkerValue>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tyield* new TreeWalker( { boundaries: this, ignoreElementEnd: true } );\n\t}\n\n\t/**\n\t * Returns whether the range is collapsed, that is if {@link #start} and\n\t * {@link #end} positions are equal.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.start.isEqual( this.end );\n\t}\n\n\t/**\n\t * Returns whether this range is flat, that is if {@link #start} position and\n\t * {@link #end} position are in the same {@link module:engine/model/position~Position#parent}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isFlat() {\n\t\tconst startParentPath = this.start.getParentPath();\n\t\tconst endParentPath = this.end.getParentPath();\n\n\t\treturn compareArrays( startParentPath, endParentPath ) == 'same';\n\t}\n\n\t/**\n\t * Range root element.\n\t *\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.start.root;\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/model/position~Position position}.\n\t *\n\t * @param {module:engine/model/position~Position} position Position to check.\n\t * @returns {Boolean} `true` if given {@link module:engine/model/position~Position position} is contained\n\t * in this range,`false` otherwise.\n\t */\n\tcontainsPosition( position ) {\n\t\treturn position.isAfter( this.start ) && position.isBefore( this.end );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link ~Range range}.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check.\n\t * @param {Boolean} [loose=false] Whether the check is loose or strict. If the check is strict (`false`), compared range cannot\n\t * start or end at the same position as this range boundaries. If the check is loose (`true`), compared range can start, end or\n\t * even be equal to this range. Note that collapsed ranges are always compared in strict mode.\n\t * @returns {Boolean} `true` if given {@link ~Range range} boundaries are contained by this range, `false` otherwise.\n\t */\n\tcontainsRange( otherRange, loose = false ) {\n\t\tif ( otherRange.isCollapsed ) {\n\t\t\tloose = false;\n\t\t}\n\n\t\tconst containsStart = this.containsPosition( otherRange.start ) || ( loose && this.start.isEqual( otherRange.start ) );\n\t\tconst containsEnd = this.containsPosition( otherRange.end ) || ( loose && this.end.isEqual( otherRange.end ) );\n\n\t\treturn containsStart && containsEnd;\n\t}\n\n\t/**\n\t * Checks whether given {@link module:engine/model/item~Item} is inside this range.\n\t *\n\t * @param {module:engine/model/item~Item} item Model item to check.\n\t */\n\tcontainsItem( item ) {\n\t\tconst pos = Position._createBefore( item );\n\n\t\treturn this.containsPosition( pos ) || this.start.isEqual( pos );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trange.is( 'range' ); // -> true\n\t *\t\trange.is( 'model:range' ); // -> true\n\t *\n\t *\t\trange.is( 'view:range' ); // -> false\n\t *\t\trange.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'range' || type == 'model:range';\n\t}\n\n\t/**\n\t * Two ranges are equal if their {@link #start} and {@link #end} positions are equal.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges are equal, `false` otherwise.\n\t */\n\tisEqual( otherRange ) {\n\t\treturn this.start.isEqual( otherRange.start ) && this.end.isEqual( otherRange.end );\n\t}\n\n\t/**\n\t * Checks and returns whether this range intersects with given range.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges intersect, `false` otherwise.\n\t */\n\tisIntersecting( otherRange ) {\n\t\treturn this.start.isBefore( otherRange.end ) && this.end.isAfter( otherRange.start );\n\t}\n\n\t/**\n\t * Computes which part(s) of this {@link ~Range range} is not a part of given {@link ~Range range}.\n\t * Returned array contains zero, one or two {@link ~Range ranges}.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 5 ] ) );\n\t *\t\tlet transformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has no ranges because `otherRange` contains `range`\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 3 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has one range: from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 4 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3 ] and from [ 4 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to differentiate against.\n\t * @returns {Array.<module:engine/model/range~Range>} The difference between ranges.\n\t */\n\tgetDifference( otherRange ) {\n\t\tconst ranges = [];\n\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect.\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the start to the middle of this range.\n\t\t\t\tranges.push( new Range( this.start, otherRange.start ) );\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the middle of this range to the end.\n\t\t\t\tranges.push( new Range( otherRange.end, this.end ) );\n\t\t\t}\n\t\t} else {\n\t\t\t// Ranges do not intersect, return the original range.\n\t\t\tranges.push( new Range( this.start, this.end ) );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an intersection of this {@link ~Range range} and given {@link ~Range range}.\n\t * Intersection is a common part of both of those ranges. If ranges has no common part, returns `null`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 2 ] ) );\n\t *\t\tlet transformed = range.getIntersection( otherRange ); // null - ranges have no common part\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 5 ] ) );\n\t *\t\ttransformed = range.getIntersection( otherRange ); // range from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check for intersection.\n\t * @returns {module:engine/model/range~Range|null} A common part of given ranges or `null` if ranges have no common part.\n\t */\n\tgetIntersection( otherRange ) {\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect, so a common range will be returned.\n\t\t\t// At most, it will be same as this range.\n\t\t\tlet commonRangeStart = this.start;\n\t\t\tlet commonRangeEnd = this.end;\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means thaNt we have to\n\t\t\t\t// shrink common range to the given range start.\n\t\t\t\tcommonRangeStart = otherRange.start;\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// shrink common range to the given range end.\n\t\t\t\tcommonRangeEnd = otherRange.end;\n\t\t\t}\n\n\t\t\treturn new Range( commonRangeStart, commonRangeEnd );\n\t\t}\n\n\t\t// Ranges do not intersect, so they do not have common part.\n\t\treturn null;\n\t}\n\n\t/**\n\t * Computes and returns the smallest set of {@link #isFlat flat} ranges, that covers this range in whole.\n\t *\n\t * See an example of a model structure (`[` and `]` are range boundaries):\n\t *\n\t *\t\troot root\n\t *\t\t |- element DIV DIV P2 P3 DIV\n\t *\t\t | |- element H H P1 f o o b a r H P4\n\t *\t\t | | |- \"fir[st\" fir[st lorem se]cond ipsum\n\t *\t\t | |- element P1\n\t *\t\t | | |- \"lorem\" ||\n\t *\t\t |- element P2 ||\n\t *\t\t | |- \"foo\" VV\n\t *\t\t |- element P3\n\t *\t\t | |- \"bar\" root\n\t *\t\t |- element DIV DIV [P2 P3] DIV\n\t *\t\t | |- element H H [P1] f o o b a r H P4\n\t *\t\t | | |- \"se]cond\" fir[st] lorem [se]cond ipsum\n\t *\t\t | |- element P4\n\t *\t\t | | |- \"ipsum\"\n\t *\n\t * As it can be seen, letters contained in the range are: `stloremfoobarse`, spread across different parents.\n\t * We are looking for minimal set of flat ranges that contains the same nodes.\n\t *\n\t * Minimal flat ranges for above range `( [ 0, 0, 3 ], [ 3, 0, 2 ] )` will be:\n\t *\n\t *\t\t( [ 0, 0, 3 ], [ 0, 0, 5 ] ) = \"st\"\n\t *\t\t( [ 0, 1 ], [ 0, 2 ] ) = element P1 (\"lorem\")\n\t *\t\t( [ 1 ], [ 3 ] ) = element P2, element P3 (\"foobar\")\n\t *\t\t( [ 3, 0, 0 ], [ 3, 0, 2 ] ) = \"se\"\n\t *\n\t * **Note:** if an {@link module:engine/model/element~Element element} is not wholly contained in this range, it won't be returned\n\t * in any of the returned flat ranges. See in the example how `H` elements at the beginning and at the end of the range\n\t * were omitted. Only their parts that were wholly in the range were returned.\n\t *\n\t * **Note:** this method is not returning flat ranges that contain no nodes.\n\t *\n\t * @returns {Array.<module:engine/model/range~Range>} Array of flat ranges covering this range.\n\t */\n\tgetMinimalFlatRanges() {\n\t\tconst ranges = [];\n\t\tconst diffAt = this.start.getCommonPath( this.end ).length;\n\n\t\tconst pos = Position._createAt( this.start );\n\t\tlet posParent = pos.parent;\n\n\t\t// Go up.\n\t\twhile ( pos.path.length > diffAt + 1 ) {\n\t\t\tconst howMany = posParent.maxOffset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.path = pos.path.slice( 0, -1 );\n\t\t\tpos.offset++;\n\t\t\tposParent = posParent.parent;\n\t\t}\n\n\t\t// Go down.\n\t\twhile ( pos.path.length <= this.end.path.length ) {\n\t\t\tconst offset = this.end.path[ pos.path.length - 1 ];\n\t\t\tconst howMany = offset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.offset = offset;\n\t\t\tpos.path.push( 0 );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/treewalker~TreeWalker TreeWalker} instance with this range as a boundary.\n\t *\n\t * For example, to iterate over all items in the entire document root:\n\t *\n\t *\t\t// Create a range spanning over the entire root content:\n\t *\t\tconst range = editor.model.createRangeIn( editor.model.document.getRoot() );\n\t *\n\t *\t\t// Iterate over all items in this range:\n\t *\t\tfor ( const value of range.getWalker() ) {\n\t *\t\t\tconsole.log( value.item );\n\t *\t\t}\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @param {module:engine/model/position~Position} [options.startPosition]\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range and `ignoreElementEnd` option\n\t * set to `true`. However it returns only {@link module:engine/model/item~Item model items},\n\t * not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @method getItems\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/model/item~Item>}\n\t */\n\t* getItems( options = {} ) {\n\t\toptions.boundaries = this;\n\t\toptions.ignoreElementEnd = true;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.item;\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/position~Position positions} that are boundaries or\n\t * contained in this range.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range. However it returns only\n\t * {@link module:engine/model/position~Position positions}, not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/model/position~Position>}\n\t */\n\t* getPositions( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tyield treeWalker.position;\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.nextPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by given `operation`.\n\t *\n\t * **Note:** transformation may break one range into multiple ranges (for example, when a part of the range is\n\t * moved to a different part of document tree). For this reason, an array is returned by this method and it\n\t * may contain one or more `Range` instances.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to transform range by.\n\t * @returns {Array.<module:engine/model/range~Range>} Range which is the result of transformation.\n\t */\n\tgetTransformedByOperation( operation ) {\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert':\n\t\t\t\treturn this._getTransformedByInsertOperation( operation );\n\t\t\tcase 'move':\n\t\t\tcase 'remove':\n\t\t\tcase 'reinsert':\n\t\t\t\treturn this._getTransformedByMoveOperation( operation );\n\t\t\tcase 'split':\n\t\t\t\treturn [ this._getTransformedBySplitOperation( operation ) ];\n\t\t\tcase 'merge':\n\t\t\t\treturn [ this._getTransformedByMergeOperation( operation ) ];\n\t\t}\n\n\t\treturn [ new Range( this.start, this.end ) ];\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by multiple `operations`.\n\t *\n\t * @see ~Range#getTransformedByOperation\n\t * @param {Iterable.<module:engine/model/operation/operation~Operation>} operations Operations to transform the range by.\n\t * @returns {Array.<module:engine/model/range~Range>} Range which is the result of transformation.\n\t */\n\tgetTransformedByOperations( operations ) {\n\t\tconst ranges = [ new Range( this.start, this.end ) ];\n\n\t\tfor ( const operation of operations ) {\n\t\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\t\tconst result = ranges[ i ].getTransformedByOperation( operation );\n\n\t\t\t\tranges.splice( i, 1, ...result );\n\t\t\t\ti += result.length - 1;\n\t\t\t}\n\t\t}\n\n\t\t// It may happen that a range is split into two, and then the part of second \"piece\" is moved into first\n\t\t// \"piece\". In this case we will have incorrect third range, which should not be included in the result --\n\t\t// because it is already included in the first \"piece\". In this loop we are looking for all such ranges that\n\t\t// are inside other ranges and we simply remove them.\n\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\tconst range = ranges[ i ];\n\n\t\t\tfor ( let j = i + 1; j < ranges.length; j++ ) {\n\t\t\t\tconst next = ranges[ j ];\n\n\t\t\t\tif ( range.containsRange( next ) || next.containsRange( range ) || range.isEqual( next ) ) {\n\t\t\t\t\tranges.splice( j, 1 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of the range's both ends (in which the entire range is contained).\n\t *\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor() {\n\t\treturn this.start.getCommonAncestor( this.end );\n\t}\n\n\t/**\n\t * Converts `Range` to plain object and returns it.\n\t *\n\t * @returns {Object} `Node` converted to plain object.\n\t */\n\ttoJSON() {\n\t\treturn {\n\t\t\tstart: this.start.toJSON(),\n\t\t\tend: this.end.toJSON()\n\t\t};\n\t}\n\n\t/**\n\t * Returns a new range that is equal to current range.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.start, this.end );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by insert operation.\n\t *\n\t * One or more ranges may be returned as a result of this transformation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/insertoperation~InsertOperation} operation\n\t * @returns {Array.<module:engine/model/range~Range>}\n\t */\n\t_getTransformedByInsertOperation( operation, spread = false ) {\n\t\treturn this._getTransformedByInsertion( operation.position, operation.howMany, spread );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by move operation.\n\t *\n\t * One or more ranges may be returned as a result of this transformation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/moveoperation~MoveOperation} operation\n\t * @returns {Array.<module:engine/model/range~Range>}\n\t */\n\t_getTransformedByMoveOperation( operation, spread = false ) {\n\t\tconst sourcePosition = operation.sourcePosition;\n\t\tconst howMany = operation.howMany;\n\t\tconst targetPosition = operation.targetPosition;\n\n\t\treturn this._getTransformedByMove( sourcePosition, targetPosition, howMany, spread );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by split operation.\n\t *\n\t * Always one range is returned. The transformation is done in a way to not break the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/splitoperation~SplitOperation} operation\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getTransformedBySplitOperation( operation ) {\n\t\tconst start = this.start._getTransformedBySplitOperation( operation );\n\t\tlet end = this.end._getTransformedBySplitOperation( operation );\n\n\t\tif ( this.end.isEqual( operation.insertionPosition ) ) {\n\t\t\tend = this.end.getShiftedBy( 1 );\n\t\t}\n\n\t\t// Below may happen when range contains graveyard element used by split operation.\n\t\tif ( start.root != end.root ) {\n\t\t\t// End position was next to the moved graveyard element and was moved with it.\n\t\t\t// Fix it by using old `end` which has proper `root`.\n\t\t\tend = this.end.getShiftedBy( -1 );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by merge operation.\n\t *\n\t * Always one range is returned. The transformation is done in a way to not break the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/mergeoperation~MergeOperation} operation\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getTransformedByMergeOperation( operation ) {\n\t\t// Special case when the marker is set on \"the closing tag\" of an element. Marker can be set like that during\n\t\t// transformations, especially when a content of a few block elements were removed. For example:\n\t\t//\n\t\t// {} is the transformed range, [] is the removed range.\n\t\t// <p>F[o{o</p><p>B}ar</p><p>Xy]z</p>\n\t\t//\n\t\t// <p>Fo{o</p><p>B}ar</p><p>z</p>\n\t\t// <p>F{</p><p>B}ar</p><p>z</p>\n\t\t// <p>F{</p>}<p>z</p>\n\t\t// <p>F{}z</p>\n\t\t//\n\t\tif ( this.start.isEqual( operation.targetPosition ) && this.end.isEqual( operation.deletionPosition ) ) {\n\t\t\treturn new Range( this.start );\n\t\t}\n\n\t\tlet start = this.start._getTransformedByMergeOperation( operation );\n\t\tlet end = this.end._getTransformedByMergeOperation( operation );\n\n\t\tif ( start.root != end.root ) {\n\t\t\t// This happens when the end position was next to the merged (deleted) element.\n\t\t\t// Then, the end position was moved to the graveyard root. In this case we need to fix\n\t\t\t// the range cause its boundaries would be in different roots.\n\t\t\tend = this.end.getShiftedBy( -1 );\n\t\t}\n\n\t\tif ( start.isAfter( end ) ) {\n\t\t\t// This happens in three following cases:\n\t\t\t//\n\t\t\t// Case 1: Merge operation source position is before the target position (due to some transformations, OT, etc.)\n\t\t\t// This means that start can be moved before the end of the range.\n\t\t\t//\n\t\t\t// Before: <p>a{a</p><p>b}b</p><p>cc</p>\n\t\t\t// Merge: <p>b}b</p><p>cca{a</p>\n\t\t\t// Fix: <p>{b}b</p><p>ccaa</p>\n\t\t\t//\n\t\t\t// Case 2: Range start is before merged node but not directly.\n\t\t\t// Result should include all nodes that were in the original range.\n\t\t\t//\n\t\t\t// Before: <p>aa</p>{<p>cc</p><p>b}b</p>\n\t\t\t// Merge: <p>aab}b</p>{<p>cc</p>\n\t\t\t// Fix: <p>aa{bb</p><p>cc</p>}\n\t\t\t//\n\t\t\t// The range is expanded by an additional `b` letter but it is better than dropping the whole `cc` paragraph.\n\t\t\t//\n\t\t\t// Case 3: Range start is directly before merged node.\n\t\t\t// Resulting range should include only nodes from the merged element:\n\t\t\t//\n\t\t\t// Before: <p>aa</p>{<p>b}b</p><p>cc</p>\n\t\t\t// Merge: <p>aab}b</p>{<p>cc</p>\n\t\t\t// Fix: <p>aa{b}b</p><p>cc</p>\n\t\t\t//\n\n\t\t\tif ( operation.sourcePosition.isBefore( operation.targetPosition ) ) {\n\t\t\t\t// Case 1.\n\t\t\t\tstart = Position._createAt( end );\n\t\t\t\tstart.offset = 0;\n\t\t\t} else {\n\t\t\t\tif ( !operation.deletionPosition.isEqual( start ) ) {\n\t\t\t\t\t// Case 2.\n\t\t\t\t\tend = operation.deletionPosition;\n\t\t\t\t}\n\n\t\t\t\t// In both case 2 and 3 start is at the end of the merge-to element.\n\t\t\t\tstart = operation.targetPosition;\n\t\t\t}\n\n\t\t\treturn new Range( start, end );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Returns an array containing one or two {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by inserting `howMany` nodes at `insertPosition`. Two {@link ~Range ranges} are\n\t * returned if the insertion was inside this {@link ~Range range} and `spread` is set to `true`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 1 ] ), 2 );\n\t *\t\t// transformed array has one range from [ 4, 7 ] to [ 6, 0, 1 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 4, 0, 0 ] ), 4 );\n\t *\t\t// transformed array has one range from [ 2, 7 ] to [ 4, 0, 5 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4 );\n\t *\t\t// transformed array has one range, which is equal to original range\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4, true );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3, 2 ] and from [ 3, 6 ] to [ 4, 0, 1 ]\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @param {Boolean} [spread] Flag indicating whether this {~Range range} should be spread if insertion\n\t * was inside the range. Defaults to `false`.\n\t * @returns {Array.<module:engine/model/range~Range>} Result of the transformation.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany, spread = false ) {\n\t\tif ( spread && this.containsPosition( insertPosition ) ) {\n\t\t\t// Range has to be spread. The first part is from original start to the spread point.\n\t\t\t// The other part is from spread point to the original end, but transformed by\n\t\t\t// insertion to reflect insertion changes.\n\n\t\t\treturn [\n\t\t\t\tnew Range( this.start, insertPosition ),\n\t\t\t\tnew Range(\n\t\t\t\t\tinsertPosition.getShiftedBy( howMany ),\n\t\t\t\t\tthis.end._getTransformedByInsertion( insertPosition, howMany )\n\t\t\t\t)\n\t\t\t];\n\t\t} else {\n\t\t\tconst range = new Range( this.start, this.end );\n\n\t\t\trange.start = range.start._getTransformedByInsertion( insertPosition, howMany );\n\t\t\trange.end = range.end._getTransformedByInsertion( insertPosition, howMany );\n\n\t\t\treturn [ range ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns an array containing {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position from which nodes are moved.\n\t * @param {module:engine/model/position~Position} targetPosition Position to where nodes are moved.\n\t * @param {Number} howMany How many nodes are moved.\n\t * @param {Boolean} [spread=false] Whether the range should be spread if the move points inside the range.\n\t * @returns {Array.<module:engine/model/range~Range>} Result of the transformation.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany, spread = false ) {\n\t\t// Special case for transforming a collapsed range. Just transform it like a position.\n\t\tif ( this.isCollapsed ) {\n\t\t\tconst newPos = this.start._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\n\t\t\treturn [ new Range( newPos ) ];\n\t\t}\n\n\t\t// Special case for transformation when a part of the range is moved towards the range.\n\t\t//\n\t\t// Examples:\n\t\t//\n\t\t// <div><p>ab</p><p>c[d</p></div><p>e]f</p> --> <div><p>ab</p></div><p>c[d</p><p>e]f</p>\n\t\t// <p>e[f</p><div><p>a]b</p><p>cd</p></div> --> <p>e[f</p><p>a]b</p><div><p>cd</p></div>\n\t\t//\n\t\t// Without this special condition, the default algorithm leaves an \"artifact\" range from one of `differenceSet` parts:\n\t\t//\n\t\t// <div><p>ab</p><p>c[d</p></div><p>e]f</p> --> <div><p>ab</p>{</div>}<p>c[d</p><p>e]f</p>\n\t\t//\n\t\t// This special case is applied only if the range is to be kept together (not spread).\n\t\tconst moveRange = Range._createFromPositionAndShift( sourcePosition, howMany );\n\t\tconst insertPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( this.containsPosition( targetPosition ) && !spread ) {\n\t\t\tif ( moveRange.containsPosition( this.start ) || moveRange.containsPosition( this.end ) ) {\n\t\t\t\tconst start = this.start._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\t\t\t\tconst end = this.end._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\n\t\t\t\treturn [ new Range( start, end ) ];\n\t\t\t}\n\t\t}\n\n\t\t// Default algorithm.\n\t\tlet result;\n\n\t\tconst differenceSet = this.getDifference( moveRange );\n\t\tlet difference = null;\n\n\t\tconst common = this.getIntersection( moveRange );\n\n\t\tif ( differenceSet.length == 1 ) {\n\t\t\t// `moveRange` and this range may intersect but may be separate.\n\t\t\tdifference = new Range(\n\t\t\t\tdifferenceSet[ 0 ].start._getTransformedByDeletion( sourcePosition, howMany ),\n\t\t\t\tdifferenceSet[ 0 ].end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} else if ( differenceSet.length == 2 ) {\n\t\t\t// `moveRange` is inside this range.\n\t\t\tdifference = new Range(\n\t\t\t\tthis.start,\n\t\t\t\tthis.end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} // else, `moveRange` contains this range.\n\n\t\tif ( difference ) {\n\t\t\tresult = difference._getTransformedByInsertion( insertPosition, howMany, common !== null || spread );\n\t\t} else {\n\t\t\tresult = [];\n\t\t}\n\n\t\tif ( common ) {\n\t\t\tconst transformedCommon = new Range(\n\t\t\t\tcommon.start._getCombined( moveRange.start, insertPosition ),\n\t\t\t\tcommon.end._getCombined( moveRange.start, insertPosition )\n\t\t\t);\n\n\t\t\tif ( result.length == 2 ) {\n\t\t\t\tresult.splice( 1, 0, transformedCommon );\n\t\t\t} else {\n\t\t\t\tresult.push( transformedCommon );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns a copy of this range that is transformed by deletion of `howMany` nodes from `deletePosition`.\n\t *\n\t * If the deleted range is intersecting with the transformed range, the transformed range will be shrank.\n\t *\n\t * If the deleted range contains transformed range, `null` will be returned.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} deletionPosition Position from which nodes are removed.\n\t * @param {Number} howMany How many nodes are removed.\n\t * @returns {module:engine/model/range~Range|null} Result of the transformation.\n\t */\n\t_getTransformedByDeletion( deletePosition, howMany ) {\n\t\tlet newStart = this.start._getTransformedByDeletion( deletePosition, howMany );\n\t\tlet newEnd = this.end._getTransformedByDeletion( deletePosition, howMany );\n\n\t\tif ( newStart == null && newEnd == null ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( newStart == null ) {\n\t\t\tnewStart = deletePosition;\n\t\t}\n\n\t\tif ( newEnd == null ) {\n\t\t\tnewEnd = deletePosition;\n\t\t}\n\n\t\treturn new Range( newStart, newEnd );\n\t}\n\n\t/**\n\t * Creates a new range, spreading from specified {@link module:engine/model/position~Position position} to a position moved by\n\t * given `shift`. If `shift` is a negative value, shifted position is treated as the beginning of the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} position Beginning of the range.\n\t * @param {Number} shift How long the range should be.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createFromPositionAndShift( position, shift ) {\n\t\tconst start = position;\n\t\tconst end = position.getShiftedBy( shift );\n\n\t\treturn shift > 0 ? new this( start, end ) : new this( end, start );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @protected\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createIn( element ) {\n\t\treturn new this( Position._createAt( element, 0 ), Position._createAt( element, element.maxOffset ) );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/model/item~Item model item} and ends after it.\n\t *\n\t * @protected\n\t * @param {module:engine/model/item~Item} item\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createOn( item ) {\n\t\treturn this._createFromPositionAndShift( Position._createBefore( item ), item.offsetSize );\n\t}\n\n\t/**\n\t * Combines all ranges from the passed array into a one range. At least one range has to be passed.\n\t * Passed ranges must not have common parts.\n\t *\n\t * The first range from the array is a reference range. If other ranges start or end on the exactly same position where\n\t * the reference range, they get combined into one range.\n\t *\n\t *\t\t[ ][] [ ][ ][ ][ ][] [ ] // Passed ranges, shown sorted\n\t *\t\t[ ] // The result of the function if the first range was a reference range.\n\t *\t [ ] // The result of the function if the third-to-seventh range was a reference range.\n\t *\t [ ] // The result of the function if the last range was a reference range.\n\t *\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to combine.\n\t * @returns {module:engine/model/range~Range} Combined range.\n\t */\n\tstatic _createFromRanges( ranges ) {\n\t\tif ( ranges.length === 0 ) {\n\t\t\t/**\n\t\t\t * At least one range has to be passed to\n\t\t\t * {@link module:engine/model/range~Range._createFromRanges `Range._createFromRanges()`}.\n\t\t\t *\n\t\t\t * @error range-create-from-ranges-empty-array\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'range-create-from-ranges-empty-array: At least one range has to be passed.',\n\t\t\t\tnull\n\t\t\t);\n\t\t} else if ( ranges.length == 1 ) {\n\t\t\treturn ranges[ 0 ].clone();\n\t\t}\n\n\t\t// 1. Set the first range in `ranges` array as a reference range.\n\t\t// If we are going to return just a one range, one of the ranges need to be the reference one.\n\t\t// Other ranges will be stuck to that range, if possible.\n\t\tconst ref = ranges[ 0 ];\n\n\t\t// 2. Sort all the ranges so it's easier to process them.\n\t\tranges.sort( ( a, b ) => {\n\t\t\treturn a.start.isAfter( b.start ) ? 1 : -1;\n\t\t} );\n\n\t\t// 3. Check at which index the reference range is now.\n\t\tconst refIndex = ranges.indexOf( ref );\n\n\t\t// 4. At this moment we don't need the original range.\n\t\t// We are going to modify the result and we need to return a new instance of Range.\n\t\t// We have to create a copy of the reference range.\n\t\tconst result = new this( ref.start, ref.end );\n\n\t\t// 5. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tif ( refIndex > 0 ) {\n\t\t\tfor ( let i = refIndex - 1; true; i++ ) {\n\t\t\t\tif ( ranges[ i ].end.isEqual( result.start ) ) {\n\t\t\t\t\tresult.start = Position._createAt( ranges[ i ].start );\n\t\t\t\t} else {\n\t\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 6. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tfor ( let i = refIndex + 1; i < ranges.length; i++ ) {\n\t\t\tif ( ranges[ i ].start.isEqual( result.end ) ) {\n\t\t\t\tresult.end = Position._createAt( ranges[ i ].end );\n\t\t\t} else {\n\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Creates a `Range` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Range`.\n\t * @param {module:engine/model/document~Document} doc Document object that will be range owner.\n\t * @returns {module:engine/model/element~Element} `Range` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\treturn new this( Position.fromJSON( json.start, doc ), Position.fromJSON( json.end, doc ) );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `${ this.root } [ ${ this.start.path.join( ', ' ) } ] - [ ${ this.end.path.join( ', ' ) } ]`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelPosition: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/mapper\n */\n\nimport ModelPosition from '../model/position';\nimport ModelRange from '../model/range';\n\nimport ViewPosition from '../view/position';\nimport ViewRange from '../view/range';\nimport ViewText from '../view/text';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Maps elements, positions and markers between {@link module:engine/view/document~Document the view} and\n * {@link module:engine/model/model the model}.\n *\n * The instance of the Mapper used for the editing pipeline is available in\n * {@link module:engine/controller/editingcontroller~EditingController#mapper `editor.editing.mapper`}.\n *\n * Mapper uses bound elements to find corresponding elements and positions, so, to get proper results,\n * all model elements should be {@link module:engine/conversion/mapper~Mapper#bindElements bound}.\n *\n * To map complex model to/from view relations, you may provide custom callbacks for\n * {@link module:engine/conversion/mapper~Mapper#event:modelToViewPosition modelToViewPosition event} and\n * {@link module:engine/conversion/mapper~Mapper#event:viewToModelPosition viewToModelPosition event} that are fired whenever\n * a position mapping request occurs.\n * Those events are fired by {@link module:engine/conversion/mapper~Mapper#toViewPosition toViewPosition}\n * and {@link module:engine/conversion/mapper~Mapper#toModelPosition toModelPosition} methods. `Mapper` adds it's own default callbacks\n * with `'lowest'` priority. To override default `Mapper` mapping, add custom callback with higher priority and\n * stop the event.\n */\nexport default class Mapper {\n\t/**\n\t * Creates an instance of the mapper.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Model element to view element mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._modelToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * View element to model element mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._viewToModelMapping = new WeakMap();\n\n\t\t/**\n\t\t * A map containing callbacks between view element names and functions evaluating length of view elements\n\t\t * in model.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._viewToModelLengthCallbacks = new Map();\n\n\t\t/**\n\t\t * Model marker name to view elements mapping.\n\t\t *\n\t\t * Keys are `String`s while values are `Set`s with {@link module:engine/view/element~Element view elements}.\n\t\t * One marker (name) can be mapped to multiple elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._markerNameToElements = new Map();\n\n\t\t/**\n\t\t * View element to model marker names mapping.\n\t\t *\n\t\t * This is reverse to {@link ~Mapper#_markerNameToElements} map.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._elementToMarkerNames = new Map();\n\n\t\t/**\n\t\t * Stores marker names of markers which has changed due to unbinding a view element (so it is assumed that the view element\n\t\t * has been removed, moved or renamed).\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<module:engine/model/markercollection~Marker>}\n\t\t */\n\t\tthis._unboundMarkerNames = new Set();\n\n\t\t// Default mapper algorithm for mapping model position to view position.\n\t\tthis.on( 'modelToViewPosition', ( evt, data ) => {\n\t\t\tif ( data.viewPosition ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst viewContainer = this._modelToViewMapping.get( data.modelPosition.parent );\n\n\t\t\tdata.viewPosition = this._findPositionIn( viewContainer, data.modelPosition.offset );\n\t\t}, { priority: 'low' } );\n\n\t\t// Default mapper algorithm for mapping view position to model position.\n\t\tthis.on( 'viewToModelPosition', ( evt, data ) => {\n\t\t\tif ( data.modelPosition ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst viewBlock = this.findMappedViewAncestor( data.viewPosition );\n\t\t\tconst modelParent = this._viewToModelMapping.get( viewBlock );\n\t\t\tconst modelOffset = this._toModelOffset( data.viewPosition.parent, data.viewPosition.offset, viewBlock );\n\n\t\t\tdata.modelPosition = ModelPosition._createAt( modelParent, modelOffset );\n\t\t}, { priority: 'low' } );\n\t}\n\n\t/**\n\t * Marks model and view elements as corresponding. Corresponding elements can be retrieved by using\n\t * the {@link module:engine/conversion/mapper~Mapper#toModelElement toModelElement} and\n\t * {@link module:engine/conversion/mapper~Mapper#toViewElement toViewElement} methods.\n\t * The information that elements are bound is also used to translate positions.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element.\n\t * @param {module:engine/view/element~Element} viewElement View element.\n\t */\n\tbindElements( modelElement, viewElement ) {\n\t\tthis._modelToViewMapping.set( modelElement, viewElement );\n\t\tthis._viewToModelMapping.set( viewElement, modelElement );\n\t}\n\n\t/**\n\t * Unbinds given {@link module:engine/view/element~Element view element} from the map.\n\t *\n\t * **Note:** view-to-model binding will be removed, if it existed. However, corresponding model-to-view binding\n\t * will be removed only if model element is still bound to passed `viewElement`.\n\t *\n\t * This behavior lets for re-binding model element to another view element without fear of losing the new binding\n\t * when the previously bound view element is unbound.\n\t *\n\t * @param {module:engine/view/element~Element} viewElement View element to unbind.\n\t */\n\tunbindViewElement( viewElement ) {\n\t\tconst modelElement = this.toModelElement( viewElement );\n\n\t\tthis._viewToModelMapping.delete( viewElement );\n\n\t\tif ( this._elementToMarkerNames.has( viewElement ) ) {\n\t\t\tfor ( const markerName of this._elementToMarkerNames.get( viewElement ) ) {\n\t\t\t\tthis._unboundMarkerNames.add( markerName );\n\t\t\t}\n\t\t}\n\n\t\tif ( this._modelToViewMapping.get( modelElement ) == viewElement ) {\n\t\t\tthis._modelToViewMapping.delete( modelElement );\n\t\t}\n\t}\n\n\t/**\n\t * Unbinds given {@link module:engine/model/element~Element model element} from the map.\n\t *\n\t * **Note:** model-to-view binding will be removed, if it existed. However, corresponding view-to-model binding\n\t * will be removed only if view element is still bound to passed `modelElement`.\n\t *\n\t * This behavior lets for re-binding view element to another model element without fear of losing the new binding\n\t * when the previously bound model element is unbound.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element to unbind.\n\t */\n\tunbindModelElement( modelElement ) {\n\t\tconst viewElement = this.toViewElement( modelElement );\n\n\t\tthis._modelToViewMapping.delete( modelElement );\n\n\t\tif ( this._viewToModelMapping.get( viewElement ) == modelElement ) {\n\t\t\tthis._viewToModelMapping.delete( viewElement );\n\t\t}\n\t}\n\n\t/**\n\t * Binds given marker name with given {@link module:engine/view/element~Element view element}. The element\n\t * will be added to the current set of elements bound with given marker name.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to bind.\n\t * @param {String} name Marker name.\n\t */\n\tbindElementToMarker( element, name ) {\n\t\tconst elements = this._markerNameToElements.get( name ) || new Set();\n\t\telements.add( element );\n\n\t\tconst names = this._elementToMarkerNames.get( element ) || new Set();\n\t\tnames.add( name );\n\n\t\tthis._markerNameToElements.set( name, elements );\n\t\tthis._elementToMarkerNames.set( element, names );\n\t}\n\n\t/**\n\t * Unbinds an element from given marker name.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to unbind.\n\t * @param {String} name Marker name.\n\t */\n\tunbindElementFromMarkerName( element, name ) {\n\t\tconst nameToElements = this._markerNameToElements.get( name );\n\n\t\tif ( nameToElements ) {\n\t\t\tnameToElements.delete( element );\n\n\t\t\tif ( nameToElements.size == 0 ) {\n\t\t\t\tthis._markerNameToElements.delete( name );\n\t\t\t}\n\t\t}\n\n\t\tconst elementToNames = this._elementToMarkerNames.get( element );\n\n\t\tif ( elementToNames ) {\n\t\t\telementToNames.delete( name );\n\n\t\t\tif ( elementToNames.size == 0 ) {\n\t\t\t\tthis._elementToMarkerNames.delete( element );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns all marker names of markers which has changed due to unbinding a view element (so it is assumed that the view element\n\t * has been removed, moved or renamed) since the last flush. After returning, the marker names list is cleared.\n\t *\n\t * @returns {Array.<String>}\n\t */\n\tflushUnboundMarkerNames() {\n\t\tconst markerNames = Array.from( this._unboundMarkerNames );\n\n\t\tthis._unboundMarkerNames.clear();\n\n\t\treturn markerNames;\n\t}\n\n\t/**\n\t * Removes all model to view and view to model bindings.\n\t */\n\tclearBindings() {\n\t\tthis._modelToViewMapping = new WeakMap();\n\t\tthis._viewToModelMapping = new WeakMap();\n\t\tthis._markerNameToElements = new Map();\n\t\tthis._elementToMarkerNames = new Map();\n\t\tthis._unboundMarkerNames = new Set();\n\t}\n\n\t/**\n\t * Gets the corresponding model element.\n\t *\n\t * **Note:** {@link module:engine/view/uielement~UIElement} does not have corresponding element in model.\n\t *\n\t * @param {module:engine/view/element~Element} viewElement View element.\n\t * @returns {module:engine/model/element~Element|undefined} Corresponding model element or `undefined` if not found.\n\t */\n\ttoModelElement( viewElement ) {\n\t\treturn this._viewToModelMapping.get( viewElement );\n\t}\n\n\t/**\n\t * Gets the corresponding view element.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element.\n\t * @returns {module:engine/view/element~Element|undefined} Corresponding view element or `undefined` if not found.\n\t */\n\ttoViewElement( modelElement ) {\n\t\treturn this._modelToViewMapping.get( modelElement );\n\t}\n\n\t/**\n\t * Gets the corresponding model range.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {module:engine/model/range~Range} Corresponding model range.\n\t */\n\ttoModelRange( viewRange ) {\n\t\treturn new ModelRange( this.toModelPosition( viewRange.start ), this.toModelPosition( viewRange.end ) );\n\t}\n\n\t/**\n\t * Gets the corresponding view range.\n\t *\n\t * @param {module:engine/model/range~Range} modelRange Model range.\n\t * @returns {module:engine/view/range~Range} Corresponding view range.\n\t */\n\ttoViewRange( modelRange ) {\n\t\treturn new ViewRange( this.toViewPosition( modelRange.start ), this.toViewPosition( modelRange.end ) );\n\t}\n\n\t/**\n\t * Gets the corresponding model position.\n\t *\n\t * @fires viewToModelPosition\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {module:engine/model/position~Position} Corresponding model position.\n\t */\n\ttoModelPosition( viewPosition ) {\n\t\tconst data = {\n\t\t\tviewPosition,\n\t\t\tmapper: this\n\t\t};\n\n\t\tthis.fire( 'viewToModelPosition', data );\n\n\t\treturn data.modelPosition;\n\t}\n\n\t/**\n\t * Gets the corresponding view position.\n\t *\n\t * @fires modelToViewPosition\n\t * @param {module:engine/model/position~Position} modelPosition Model position.\n\t * @param {Object} [options] Additional options for position mapping process.\n\t * @param {Boolean} [options.isPhantom=false] Should be set to `true` if the model position to map is pointing to a place\n\t * in model tree which no longer exists. For example, it could be an end of a removed model range.\n\t * @returns {module:engine/view/position~Position} Corresponding view position.\n\t */\n\ttoViewPosition( modelPosition, options = { isPhantom: false } ) {\n\t\tconst data = {\n\t\t\tmodelPosition,\n\t\t\tmapper: this,\n\t\t\tisPhantom: options.isPhantom\n\t\t};\n\n\t\tthis.fire( 'modelToViewPosition', data );\n\n\t\treturn data.viewPosition;\n\t}\n\n\t/**\n\t * Gets all view elements bound to the given marker name.\n\t *\n\t * @param {String} name Marker name.\n\t * @returns {Set.<module:engine/view/element~Element>|null} View elements bound with given marker name or `null`\n\t * if no elements are bound to given marker name.\n\t */\n\tmarkerNameToElements( name ) {\n\t\tconst boundElements = this._markerNameToElements.get( name );\n\n\t\tif ( !boundElements ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst elements = new Set();\n\n\t\tfor ( const element of boundElements ) {\n\t\t\tif ( element.is( 'attributeElement' ) ) {\n\t\t\t\tfor ( const clone of element.getElementsWithSameId() ) {\n\t\t\t\t\telements.add( clone );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\telements.add( element );\n\t\t\t}\n\t\t}\n\n\t\treturn elements;\n\t}\n\n\t/**\n\t * Registers a callback that evaluates the length in the model of a view element with given name.\n\t *\n\t * The callback is fired with one argument, which is a view element instance. The callback is expected to return\n\t * a number representing the length of view element in model.\n\t *\n\t *\t\t// List item in view may contain nested list, which have other list items. In model though,\n\t *\t\t// the lists are represented by flat structure. Because of those differences, length of list view element\n\t *\t\t// may be greater than one. In the callback it's checked how many nested list items are in evaluated list item.\n\t *\n\t *\t\tfunction getViewListItemLength( element ) {\n\t *\t\t\tlet length = 1;\n\t *\n\t *\t\t\tfor ( let child of element.getChildren() ) {\n\t *\t\t\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t *\t\t\t\t\tfor ( let item of child.getChildren() ) {\n\t *\t\t\t\t\t\tlength += getViewListItemLength( item );\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\n\t *\t\t\treturn length;\n\t *\t\t}\n\t *\n\t *\t\tmapper.registerViewToModelLength( 'li', getViewListItemLength );\n\t *\n\t * @param {String} viewElementName Name of view element for which callback is registered.\n\t * @param {Function} lengthCallback Function return a length of view element instance in model.\n\t */\n\tregisterViewToModelLength( viewElementName, lengthCallback ) {\n\t\tthis._viewToModelLengthCallbacks.set( viewElementName, lengthCallback );\n\t}\n\n\t/**\n\t * For given `viewPosition`, finds and returns the closest ancestor of this position that has a mapping to\n\t * the model.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition Position for which mapped ancestor should be found.\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tfindMappedViewAncestor( viewPosition ) {\n\t\tlet parent = viewPosition.parent;\n\n\t\twhile ( !this._viewToModelMapping.has( parent ) ) {\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn parent;\n\t}\n\n\t/**\n\t * Calculates model offset based on the view position and the block element.\n\t *\n\t * Example:\n\t *\n\t *\t\t<p>foo<b>ba|r</b></p> // _toModelOffset( b, 2, p ) -> 5\n\t *\n\t * Is a sum of:\n\t *\n\t *\t\t<p>foo|<b>bar</b></p> // _toModelOffset( p, 3, p ) -> 3\n\t *\t\t<p>foo<b>ba|r</b></p> // _toModelOffset( b, 2, b ) -> 2\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewParent Position parent.\n\t * @param {Number} viewOffset Position offset.\n\t * @param {module:engine/view/element~Element} viewBlock Block used as a base to calculate offset.\n\t * @returns {Number} Offset in the model.\n\t */\n\t_toModelOffset( viewParent, viewOffset, viewBlock ) {\n\t\tif ( viewBlock != viewParent ) {\n\t\t\t// See example.\n\t\t\tconst offsetToParentStart = this._toModelOffset( viewParent.parent, viewParent.index, viewBlock );\n\t\t\tconst offsetInParent = this._toModelOffset( viewParent, viewOffset, viewParent );\n\n\t\t\treturn offsetToParentStart + offsetInParent;\n\t\t}\n\n\t\t// viewBlock == viewParent, so we need to calculate the offset in the parent element.\n\n\t\t// If the position is a text it is simple (\"ba|r\" -> 2).\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\treturn viewOffset;\n\t\t}\n\n\t\t// If the position is in an element we need to sum lengths of siblings ( <b> bar </b> foo | -> 3 + 3 = 6 ).\n\t\tlet modelOffset = 0;\n\n\t\tfor ( let i = 0; i < viewOffset; i++ ) {\n\t\t\tmodelOffset += this.getModelLength( viewParent.getChild( i ) );\n\t\t}\n\n\t\treturn modelOffset;\n\t}\n\n\t/**\n\t * Gets the length of the view element in the model.\n\t *\n\t * The length is calculated as follows:\n\t * * if {@link #registerViewToModelLength length mapping callback} is provided for given `viewNode` it is used to\n\t * evaluate model length (`viewNode` is used as first and only parameter passed to the callback),\n\t * * length of a {@link module:engine/view/text~Text text node} is equal to the length of it's\n\t * {@link module:engine/view/text~Text#data data},\n\t * * length of a {@link module:engine/view/uielement~UIElement ui element} is equal to 0,\n\t * * length of a mapped {@link module:engine/view/element~Element element} is equal to 1,\n\t * * length of a not-mapped {@link module:engine/view/element~Element element} is equal to the length of it's children.\n\t *\n\t * Examples:\n\t *\n\t *\t\tfoo -> 3 // Text length is equal to it's data length.\n\t *\t\t<p>foo</p> -> 1 // Length of an element which is mapped is by default equal to 1.\n\t *\t\t<b>foo</b> -> 3 // Length of an element which is not mapped is a length of its children.\n\t *\t\t<div><p>x</p><p>y</p></div> -> 2 // Assuming that <div> is not mapped and <p> are mapped.\n\t *\n\t * @param {module:engine/view/element~Element} viewNode View node.\n\t * @returns {Number} Length of the node in the tree model.\n\t */\n\tgetModelLength( viewNode ) {\n\t\tif ( this._viewToModelLengthCallbacks.get( viewNode.name ) ) {\n\t\t\tconst callback = this._viewToModelLengthCallbacks.get( viewNode.name );\n\n\t\t\treturn callback( viewNode );\n\t\t} else if ( this._viewToModelMapping.has( viewNode ) ) {\n\t\t\treturn 1;\n\t\t} else if ( viewNode.is( 'text' ) ) {\n\t\t\treturn viewNode.data.length;\n\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\treturn 0;\n\t\t} else {\n\t\t\tlet len = 0;\n\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tlen += this.getModelLength( child );\n\t\t\t}\n\n\t\t\treturn len;\n\t\t}\n\t}\n\n\t/**\n\t * Finds the position in the view node (or its children) with the expected model offset.\n\t *\n\t * Example:\n\t *\n\t *\t\t<p>fo<b>bar</b>bom</p> -> expected offset: 4\n\t *\n\t *\t\t_findPositionIn( p, 4 ):\n\t *\t\t<p>|fo<b>bar</b>bom</p> -> expected offset: 4, actual offset: 0\n\t *\t\t<p>fo|<b>bar</b>bom</p> -> expected offset: 4, actual offset: 2\n\t *\t\t<p>fo<b>bar</b>|bom</p> -> expected offset: 4, actual offset: 5 -> we are too far\n\t *\n\t *\t\t_findPositionIn( b, 4 - ( 5 - 3 ) ):\n\t *\t\t<p>fo<b>|bar</b>bom</p> -> expected offset: 2, actual offset: 0\n\t *\t\t<p>fo<b>bar|</b>bom</p> -> expected offset: 2, actual offset: 3 -> we are too far\n\t *\n\t *\t\t_findPositionIn( bar, 2 - ( 3 - 3 ) ):\n\t *\t\tWe are in the text node so we can simple find the offset.\n\t *\t\t<p>fo<b>ba|r</b>bom</p> -> expected offset: 2, actual offset: 2 -> position found\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewParent Tree view element in which we are looking for the position.\n\t * @param {Number} expectedOffset Expected offset.\n\t * @returns {module:engine/view/position~Position} Found position.\n\t */\n\t_findPositionIn( viewParent, expectedOffset ) {\n\t\t// Last scanned view node.\n\t\tlet viewNode;\n\t\t// Length of the last scanned view node.\n\t\tlet lastLength = 0;\n\n\t\tlet modelOffset = 0;\n\t\tlet viewOffset = 0;\n\n\t\t// In the text node it is simple: offset in the model equals offset in the text.\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\treturn new ViewPosition( viewParent, expectedOffset );\n\t\t}\n\n\t\t// In other cases we add lengths of child nodes to find the proper offset.\n\n\t\t// If it is smaller we add the length.\n\t\twhile ( modelOffset < expectedOffset ) {\n\t\t\tviewNode = viewParent.getChild( viewOffset );\n\t\t\tlastLength = this.getModelLength( viewNode );\n\t\t\tmodelOffset += lastLength;\n\t\t\tviewOffset++;\n\t\t}\n\n\t\t// If it equals we found the position.\n\t\tif ( modelOffset == expectedOffset ) {\n\t\t\treturn this._moveViewPositionToTextNode( new ViewPosition( viewParent, viewOffset ) );\n\t\t}\n\t\t// If it is higher we need to enter last child.\n\t\telse {\n\t\t\t// ( modelOffset - lastLength ) is the offset to the child we enter,\n\t\t\t// so we subtract it from the expected offset to fine the offset in the child.\n\t\t\treturn this._findPositionIn( viewNode, expectedOffset - ( modelOffset - lastLength ) );\n\t\t}\n\t}\n\n\t/**\n\t * Because we prefer positions in text nodes over positions next to text node moves view position to the text node\n\t * if it was next to it.\n\t *\n\t *\t\t<p>[]<b>foo</b></p> -> <p>[]<b>foo</b></p> // do not touch if position is not directly next to text\n\t *\t\t<p>foo[]<b>foo</b></p> -> <p>foo{}<b>foo</b></p> // move to text node\n\t *\t\t<p><b>[]foo</b></p> -> <p><b>{}foo</b></p> // move to text node\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} viewPosition Position potentially next to text node.\n\t * @returns {module:engine/view/position~Position} Position in text node if possible.\n\t */\n\t_moveViewPositionToTextNode( viewPosition ) {\n\t\t// If the position is just after text node, put it at the end of that text node.\n\t\t// If the position is just before text node, put it at the beginning of that text node.\n\t\tconst nodeBefore = viewPosition.nodeBefore;\n\t\tconst nodeAfter = viewPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText ) {\n\t\t\treturn new ViewPosition( nodeBefore, nodeBefore.data.length );\n\t\t} else if ( nodeAfter instanceof ViewText ) {\n\t\t\treturn new ViewPosition( nodeAfter, 0 );\n\t\t}\n\n\t\t// Otherwise, just return the given position.\n\t\treturn viewPosition;\n\t}\n\n\t/**\n\t * Fired for each model-to-view position mapping request. The purpose of this event is to enable custom model-to-view position\n\t * mapping. Callbacks added to this event take {@link module:engine/model/position~Position model position} and are expected to\n\t * calculate {@link module:engine/view/position~Position view position}. Calculated view position should be added as `viewPosition`\n\t * value in `data` object that is passed as one of parameters to the event callback.\n\t *\n\t * \t\t// Assume that \"captionedImage\" model element is converted to <img> and following <span> elements in view,\n\t * \t\t// and the model element is bound to <img> element. Force mapping model positions inside \"captionedImage\" to that\n\t * \t\t// <span> element.\n\t *\t\tmapper.on( 'modelToViewPosition', ( evt, data ) => {\n\t *\t\t\tconst positionParent = modelPosition.parent;\n\t *\n\t *\t\t\tif ( positionParent.name == 'captionedImage' ) {\n\t *\t\t\t\tconst viewImg = data.mapper.toViewElement( positionParent );\n\t *\t\t\t\tconst viewCaption = viewImg.nextSibling; // The <span> element.\n\t *\n\t *\t\t\t\tdata.viewPosition = new ViewPosition( viewCaption, modelPosition.offset );\n\t *\n\t *\t\t\t\t// Stop the event if other callbacks should not modify calculated value.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** keep in mind that sometimes a \"phantom\" model position is being converted. \"Phantom\" model position is\n\t * a position that points to a non-existing place in model. Such position might still be valid for conversion, though\n\t * (it would point to a correct place in view when converted). One example of such situation is when a range is\n\t * removed from model, there may be a need to map the range's end (which is no longer valid model position). To\n\t * handle such situation, check `data.isPhantom` flag:\n\t *\n\t * \t\t// Assume that there is \"customElement\" model element and whenever position is before it, we want to move it\n\t * \t\t// to the inside of the view element bound to \"customElement\".\n\t *\t\tmapper.on( 'modelToViewPosition', ( evt, data ) => {\n\t *\t\t\tif ( data.isPhantom ) {\n\t *\t\t\t\treturn;\n\t *\t\t\t}\n\t *\n\t *\t\t\t// Below line might crash for phantom position that does not exist in model.\n\t *\t\t\tconst sibling = data.modelPosition.nodeBefore;\n\t *\n\t *\t\t\t// Check if this is the element we are interested in.\n\t *\t\t\tif ( !sibling.is( 'customElement' ) ) {\n\t *\t\t\t\treturn;\n\t *\t\t\t}\n\t *\n\t *\t\t\tconst viewElement = data.mapper.toViewElement( sibling );\n\t *\n\t *\t\t\tdata.viewPosition = new ViewPosition( sibling, 0 );\n\t *\n\t *\t\t\tevt.stop();\n\t *\t\t} );\n\t *\n\t * **Note:** default mapping callback is provided with `low` priority setting and does not cancel the event, so it is possible to\n\t * attach a custom callback after default callback and also use `data.viewPosition` calculated by default callback\n\t * (for example to fix it).\n\t *\n\t * **Note:** default mapping callback will not fire if `data.viewPosition` is already set.\n\t *\n\t * **Note:** these callbacks are called **very often**. For efficiency reasons, it is advised to use them only when position\n\t * mapping between given model and view elements is unsolvable using just elements mapping and default algorithm. Also,\n\t * the condition that checks if special case scenario happened should be as simple as possible.\n\t *\n\t * @event modelToViewPosition\n\t * @param {Object} data Data pipeline object that can store and pass data between callbacks. The callback should add\n\t * `viewPosition` value to that object with calculated {@link module:engine/view/position~Position view position}.\n\t * @param {module:engine/conversion/mapper~Mapper} data.mapper Mapper instance that fired the event.\n\t */\n\n\t/**\n\t * Fired for each view-to-model position mapping request. See {@link module:engine/conversion/mapper~Mapper#event:modelToViewPosition}.\n\t *\n\t * \t\t// See example in `modelToViewPosition` event description.\n\t * \t\t// This custom mapping will map positions from <span> element next to <img> to the \"captionedImage\" element.\n\t *\t\tmapper.on( 'viewToModelPosition', ( evt, data ) => {\n\t *\t\t\tconst positionParent = viewPosition.parent;\n\t *\n\t *\t\t\tif ( positionParent.hasClass( 'image-caption' ) ) {\n\t *\t\t\t\tconst viewImg = positionParent.previousSibling;\n\t *\t\t\t\tconst modelImg = data.mapper.toModelElement( viewImg );\n\t *\n\t *\t\t\t\tdata.modelPosition = new ModelPosition( modelImg, viewPosition.offset );\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** default mapping callback is provided with `low` priority setting and does not cancel the event, so it is possible to\n\t * attach a custom callback after default callback and also use `data.modelPosition` calculated by default callback\n\t * (for example to fix it).\n\t *\n\t * **Note:** default mapping callback will not fire if `data.modelPosition` is already set.\n\t *\n\t * **Note:** these callbacks are called **very often**. For efficiency reasons, it is advised to use them only when position\n\t * mapping between given model and view elements is unsolvable using just elements mapping and default algorithm. Also,\n\t * the condition that checks if special case scenario happened should be as simple as possible.\n\t *\n\t * @event viewToModelPosition\n\t * @param {Object} data Data pipeline object that can store and pass data between callbacks. The callback should add\n\t * `modelPosition` value to that object with calculated {@link module:engine/model/position~Position model position}.\n\t * @param {module:engine/conversion/mapper~Mapper} data.mapper Mapper instance that fired the event.\n\t */\n}\n\nmix( Mapper, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/modelconsumable\n */\n\nimport TextProxy from '../model/textproxy';\n\n/**\n * Manages a list of consumable values for {@link module:engine/model/item~Item model items}.\n *\n * Consumables are various aspects of the model. A model item can be broken down into singular properties that might be\n * taken into consideration when converting that item.\n *\n * `ModelConsumable` is used by {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} while analyzing changed\n * parts of {@link module:engine/model/document~Document the document}. The added / changed / removed model items are broken down\n * into singular properties (the item itself and it's attributes). All those parts are saved in `ModelConsumable`. Then,\n * during conversion, when given part of model item is converted (i.e. the view element has been inserted into the view,\n * but without attributes), consumable value is removed from `ModelConsumable`.\n *\n * For model items, `ModelConsumable` stores consumable values of one of following types: `insert`, `addattribute:<attributeKey>`,\n * `changeattributes:<attributeKey>`, `removeattributes:<attributeKey>`.\n *\n * In most cases, it is enough to let {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n * gather consumable values, so there is no need to use\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#add add method} directly.\n * However, it is important to understand how consumable values can be\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed}.\n * See {@link module:engine/conversion/downcasthelpers default downcast converters} for more information.\n *\n * Keep in mind, that one conversion event may have multiple callbacks (converters) attached to it. Each of those is\n * able to convert one or more parts of the model. However, when one of those callbacks actually converts\n * something, other should not, because they would duplicate the results. Using `ModelConsumable` helps avoiding\n * this situation, because callbacks should only convert those values, which were not yet consumed from `ModelConsumable`.\n *\n * Consuming multiple values in a single callback:\n *\n *\t\t// Converter for custom `image` element that might have a `caption` element inside which changes\n *\t\t// how the image is displayed in the view:\n *\t\t//\n *\t\t// Model:\n *\t\t//\n *\t\t// [image]\n *\t\t// └─ [caption]\n *\t\t// └─ foo\n *\t\t//\n *\t\t// View:\n *\t\t//\n *\t\t// <figure>\n *\t\t// ├─ <img />\n *\t\t// └─ <caption>\n *\t\t// └─ foo\n *\t\tmodelConversionDispatcher.on( 'insert:image', ( evt, data, conversionApi ) => {\n *\t\t\t// First, consume the `image` element.\n *\t\t\tconversionApi.consumable.consume( data.item, 'insert' );\n *\n *\t\t\t// Just create normal image element for the view.\n *\t\t\t// Maybe it will be \"decorated\" later.\n *\t\t\tconst viewImage = new ViewElement( 'img' );\n *\t\t\tconst insertPosition = conversionApi.mapper.toViewPosition( data.range.start );\n *\t\t\tconst viewWriter = conversionApi.writer;\n *\n *\t\t\t// Check if the `image` element has children.\n *\t\t\tif ( data.item.childCount > 0 ) {\n *\t\t\t\tconst modelCaption = data.item.getChild( 0 );\n *\n *\t\t\t\t// `modelCaption` insertion change is consumed from consumable values.\n *\t\t\t\t// It will not be converted by other converters, but it's children (probably some text) will be.\n *\t\t\t\t// Through mapping, converters for text will know where to insert contents of `modelCaption`.\n *\t\t\t\tif ( conversionApi.consumable.consume( modelCaption, 'insert' ) ) {\n *\t\t\t\t\tconst viewCaption = new ViewElement( 'figcaption' );\n *\n *\t\t\t\t\tconst viewImageHolder = new ViewElement( 'figure', null, [ viewImage, viewCaption ] );\n *\n *\t\t\t\t\tconversionApi.mapper.bindElements( modelCaption, viewCaption );\n *\t\t\t\t\tconversionApi.mapper.bindElements( data.item, viewImageHolder );\n *\t\t\t\t\tviewWriter.insert( insertPosition, viewImageHolder );\n *\t\t\t\t}\n *\t\t\t} else {\n *\t\t\t\tconversionApi.mapper.bindElements( data.item, viewImage );\n *\t\t\t\tviewWriter.insert( insertPosition, viewImage );\n *\t\t\t}\n *\n *\t\t\tevt.stop();\n *\t\t} );\n */\nexport default class ModelConsumable {\n\t/**\n\t * Creates an empty consumables list.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Contains list of consumable values.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/conversion/modelconsumable~ModelConsumable#_consumable\n\t\t */\n\t\tthis._consumable = new Map();\n\n\t\t/**\n\t\t * For each {@link module:engine/model/textproxy~TextProxy} added to `ModelConsumable`, this registry holds parent\n\t\t * of that `TextProxy` and start and end indices of that `TextProxy`. This allows identification of `TextProxy`\n\t\t * instances that points to the same part of the model but are different instances. Each distinct `TextProxy`\n\t\t * is given unique `Symbol` which is then registered as consumable. This process is transparent for `ModelConsumable`\n\t\t * API user because whenever `TextProxy` is added, tested, consumed or reverted, internal mechanisms of\n\t\t * `ModelConsumable` translates `TextProxy` to that unique `Symbol`.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/conversion/modelconsumable~ModelConsumable#_textProxyRegistry\n\t\t */\n\t\tthis._textProxyRegistry = new Map();\n\t}\n\n\t/**\n\t * Adds a consumable value to the consumables list and links it with given model item.\n\t *\n\t *\t\tmodelConsumable.add( modelElement, 'insert' ); // Add `modelElement` insertion change to consumable values.\n\t *\t\tmodelConsumable.add( modelElement, 'addAttribute:bold' ); // Add `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.add( modelElement, 'removeAttribute:bold' ); // Add `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.add( modelSelection, 'selection' ); // Add `modelSelection` to consumable values.\n\t *\t\tmodelConsumable.add( modelRange, 'range' ); // Add `modelRange` to consumable values.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection that has the consumable.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t */\n\tadd( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tif ( !this._consumable.has( item ) ) {\n\t\t\tthis._consumable.set( item, new Map() );\n\t\t}\n\n\t\tthis._consumable.get( item ).set( type, true );\n\t}\n\n\t/**\n\t * Removes given consumable value from given model item.\n\t *\n\t *\t\tmodelConsumable.consume( modelElement, 'insert' ); // Remove `modelElement` insertion change from consumable values.\n\t *\t\tmodelConsumable.consume( modelElement, 'addAttribute:bold' ); // Remove `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.consume( modelElement, 'removeAttribute:bold' ); // Remove `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.consume( modelSelection, 'selection' ); // Remove `modelSelection` from consumable values.\n\t *\t\tmodelConsumable.consume( modelRange, 'range' ); // Remove 'modelRange' from consumable values.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection from which consumable will be consumed.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t * @returns {Boolean} `true` if consumable value was available and was consumed, `false` otherwise.\n\t */\n\tconsume( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tif ( this.test( item, type ) ) {\n\t\t\tthis._consumable.get( item ).set( type, false );\n\n\t\t\treturn true;\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Tests whether there is a consumable value of given type connected with given model item.\n\t *\n\t *\t\tmodelConsumable.test( modelElement, 'insert' ); // Check for `modelElement` insertion change.\n\t *\t\tmodelConsumable.test( modelElement, 'addAttribute:bold' ); // Check for `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.test( modelElement, 'removeAttribute:bold' ); // Check for `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.test( modelSelection, 'selection' ); // Check if `modelSelection` is consumable.\n\t *\t\tmodelConsumable.test( modelRange, 'range' ); // Check if `modelRange` is consumable.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection to be tested.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t * @returns {null|Boolean} `null` if such consumable was never added, `false` if the consumable values was\n\t * already consumed or `true` if it was added and not consumed yet.\n\t */\n\ttest( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tconst itemConsumables = this._consumable.get( item );\n\n\t\tif ( itemConsumables === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst value = itemConsumables.get( type );\n\n\t\tif ( value === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn value;\n\t}\n\n\t/**\n\t * Reverts consuming of consumable value.\n\t *\n\t *\t\tmodelConsumable.revert( modelElement, 'insert' ); // Revert consuming `modelElement` insertion change.\n\t *\t\tmodelConsumable.revert( modelElement, 'addAttribute:bold' ); // Revert consuming `bold` attribute insert from `modelElement`.\n\t *\t\tmodelConsumable.revert( modelElement, 'removeAttribute:bold' ); // Revert consuming `bold` attribute remove from `modelElement`.\n\t *\t\tmodelConsumable.revert( modelSelection, 'selection' ); // Revert consuming `modelSelection`.\n\t *\t\tmodelConsumable.revert( modelRange, 'range' ); // Revert consuming `modelRange`.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection to be reverted.\n\t * @param {String} type Consumable type.\n\t * @returns {null|Boolean} `true` if consumable has been reversed, `false` otherwise. `null` if the consumable has\n\t * never been added.\n\t */\n\trevert( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tconst test = this.test( item, type );\n\n\t\tif ( test === false ) {\n\t\t\tthis._consumable.get( item ).set( type, true );\n\n\t\t\treturn true;\n\t\t} else if ( test === true ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Gets a unique symbol for passed {@link module:engine/model/textproxy~TextProxy} instance. All `TextProxy` instances that\n\t * have same parent, same start index and same end index will get the same symbol.\n\t *\n\t * Used internally to correctly consume `TextProxy` instances.\n\t *\n\t * @private\n\t * @param {module:engine/model/textproxy~TextProxy} textProxy `TextProxy` instance to get a symbol for.\n\t * @returns {Symbol} Symbol representing all equal instances of `TextProxy`.\n\t */\n\t_getSymbolForTextProxy( textProxy ) {\n\t\tlet symbol = null;\n\n\t\tconst startMap = this._textProxyRegistry.get( textProxy.startOffset );\n\n\t\tif ( startMap ) {\n\t\t\tconst endMap = startMap.get( textProxy.endOffset );\n\n\t\t\tif ( endMap ) {\n\t\t\t\tsymbol = endMap.get( textProxy.parent );\n\t\t\t}\n\t\t}\n\n\t\tif ( !symbol ) {\n\t\t\tsymbol = this._addSymbolForTextProxy( textProxy.startOffset, textProxy.endOffset, textProxy.parent );\n\t\t}\n\n\t\treturn symbol;\n\t}\n\n\t/**\n\t * Adds a symbol for given properties that characterizes a {@link module:engine/model/textproxy~TextProxy} instance.\n\t *\n\t * Used internally to correctly consume `TextProxy` instances.\n\t *\n\t * @private\n\t * @param {Number} startIndex Text proxy start index in it's parent.\n\t * @param {Number} endIndex Text proxy end index in it's parent.\n\t * @param {module:engine/model/element~Element} parent Text proxy parent.\n\t * @returns {Symbol} Symbol generated for given properties.\n\t */\n\t_addSymbolForTextProxy( start, end, parent ) {\n\t\tconst symbol = Symbol( 'textProxySymbol' );\n\t\tlet startMap, endMap;\n\n\t\tstartMap = this._textProxyRegistry.get( start );\n\n\t\tif ( !startMap ) {\n\t\t\tstartMap = new Map();\n\t\t\tthis._textProxyRegistry.set( start, startMap );\n\t\t}\n\n\t\tendMap = startMap.get( end );\n\n\t\tif ( !endMap ) {\n\t\t\tendMap = new Map();\n\t\t\tstartMap.set( end, endMap );\n\t\t}\n\n\t\tendMap.set( parent, symbol );\n\n\t\treturn symbol;\n\t}\n}\n\n// Returns a normalized consumable type name from given string. A normalized consumable type name is a string that has\n// at most one colon, for example: `insert` or `addMarker:highlight`. If string to normalize has more \"parts\" (more colons),\n// the other parts are dropped, for example: `addattribute:bold:$text` -> `addattributes:bold`.\n//\n// @param {String} type Consumable type.\n// @returns {String} Normalized consumable type.\nfunction _normalizeConsumableType( type ) {\n\tconst parts = type.split( ':' );\n\n\treturn parts.length > 1 ? parts[ 0 ] + ':' + parts[ 1 ] : parts[ 0 ];\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/downcastdispatcher\n */\n\nimport Consumable from './modelconsumable';\nimport Range from '../model/range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { extend } from 'lodash-es';\n\n/**\n * `DowncastDispatcher` is a central point of downcasting (conversion from model to view), which is a process of reacting to changes\n * in the model and firing a set of events. Callbacks listening to those events are called converters. Those\n * converters role is to convert the model changes to changes in view (for example, adding view nodes or\n * changing attributes on view elements).\n *\n * During conversion process, `DowncastDispatcher` fires events, basing on state of the model and prepares\n * data for those events. It is important to understand that those events are connected with changes done on model,\n * for example: \"node has been inserted\" or \"attribute has changed\". This is in a contrary to upcasting (view to model conversion),\n * where we convert view state (view nodes) to a model tree.\n *\n * The events are prepared basing on a diff created by {@link module:engine/model/differ~Differ Differ}, which buffers them\n * and then passes to `DowncastDispatcher` as a diff between old model state and new model state.\n *\n * Note, that because changes are converted there is a need to have a mapping between model structure and view structure.\n * To map positions and elements during downcast (model to view conversion) use {@link module:engine/conversion/mapper~Mapper}.\n *\n * `DowncastDispatcher` fires following events for model tree changes:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert insert}\n * if a range of nodes has been inserted to the model tree,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove remove}\n * if a range of nodes has been removed from the model tree,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute attribute}\n * if attribute has been added, changed or removed from a model node.\n *\n * For {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert insert}\n * and {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute attribute},\n * `DowncastDispatcher` generates {@link module:engine/conversion/modelconsumable~ModelConsumable consumables}.\n * These are used to have a control over which changes has been already consumed. It is useful when some converters\n * overwrite other or converts multiple changes (for example converts insertion of an element and also converts that\n * element's attributes during insertion).\n *\n * Additionally, `DowncastDispatcher` fires events for {@link module:engine/model/markercollection~Marker marker} changes:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker} if a marker has been added,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:removeMarker} if a marker has been removed.\n *\n * Note, that changing a marker is done through removing the marker from the old range, and adding on the new range,\n * so both those events are fired.\n *\n * Finally, `DowncastDispatcher` also handles firing events for {@link module:engine/model/selection model selection}\n * conversion:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:selection}\n * which converts selection from model to view,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute}\n * which is fired for every selection attribute,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}\n * which is fired for every marker which contains selection.\n *\n * Unlike model tree and markers, events for selection are not fired for changes but for selection state.\n *\n * When providing custom listeners for `DowncastDispatcher` remember to check whether given change has not been\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed} yet.\n *\n * When providing custom listeners for `DowncastDispatcher` keep in mind that any callback that had\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed} a value from a consumable and\n * converted the change should also stop the event (for efficiency purposes).\n *\n * When providing custom listeners for `DowncastDispatcher` remember to use provided\n * {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer} to apply changes to the view document.\n *\n * Example of a custom converter for `DowncastDispatcher`:\n *\n *\t\t// We will convert inserting \"paragraph\" model element into the model.\n *\t\tdowncastDispatcher.on( 'insert:paragraph', ( evt, data, conversionApi ) => {\n *\t\t\t// Remember to check whether the change has not been consumed yet and consume it.\n *\t\t\tif ( conversionApi.consumable.consume( data.item, 'insert' ) ) {\n *\t\t\t\treturn;\n *\t\t\t}\n *\n *\t\t\t// Translate position in model to position in view.\n *\t\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n *\n *\t\t\t// Create <p> element that will be inserted in view at `viewPosition`.\n *\t\t\tconst viewElement = conversionApi.writer.createContainerElement( 'p' );\n *\n *\t\t\t// Bind the newly created view element to model element so positions will map accordingly in future.\n *\t\t\tconversionApi.mapper.bindElements( data.item, viewElement );\n *\n *\t\t\t// Add the newly created view element to the view.\n *\t\t\tconversionApi.writer.insert( viewPosition, viewElement );\n *\n *\t\t\t// Remember to stop the event propagation.\n *\t\t\tevt.stop();\n *\t\t} );\n */\nexport default class DowncastDispatcher {\n\t/**\n\t * Creates a `DowncastDispatcher` instance.\n\t *\n\t * @see module:engine/conversion/downcastdispatcher~DowncastConversionApi\n\t * @param {Object} conversionApi Additional properties for interface that will be passed to events fired\n\t * by `DowncastDispatcher`.\n\t */\n\tconstructor( conversionApi ) {\n\t\t/**\n\t\t * Interface passed by dispatcher to the events callbacks.\n\t\t *\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastConversionApi}\n\t\t */\n\t\tthis.conversionApi = extend( { dispatcher: this }, conversionApi );\n\t}\n\n\t/**\n\t * Takes {@link module:engine/model/differ~Differ model differ} object with buffered changes and fires conversion basing on it.\n\t *\n\t * @param {module:engine/model/differ~Differ} differ Differ object with buffered changes.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Markers connected with converted model.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertChanges( differ, markers, writer ) {\n\t\t// Before the view is updated, remove markers which have changed.\n\t\tfor ( const change of differ.getMarkersToRemove() ) {\n\t\t\tthis.convertMarkerRemove( change.name, change.range, writer );\n\t\t}\n\n\t\t// Convert changes that happened on model tree.\n\t\tfor ( const entry of differ.getChanges() ) {\n\t\t\tif ( entry.type == 'insert' ) {\n\t\t\t\tthis.convertInsert( Range._createFromPositionAndShift( entry.position, entry.length ), writer );\n\t\t\t} else if ( entry.type == 'remove' ) {\n\t\t\t\tthis.convertRemove( entry.position, entry.length, entry.name, writer );\n\t\t\t} else {\n\t\t\t\t// entry.type == 'attribute'.\n\t\t\t\tthis.convertAttribute( entry.range, entry.attributeKey, entry.attributeOldValue, entry.attributeNewValue, writer );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const markerName of this.conversionApi.mapper.flushUnboundMarkerNames() ) {\n\t\t\tconst markerRange = markers.get( markerName ).getRange();\n\n\t\t\tthis.convertMarkerRemove( markerName, markerRange, writer );\n\t\t\tthis.convertMarkerAdd( markerName, markerRange, writer );\n\t\t}\n\n\t\t// After the view is updated, convert markers which have changed.\n\t\tfor ( const change of differ.getMarkersToAdd() ) {\n\t\t\tthis.convertMarkerAdd( change.name, change.range, writer );\n\t\t}\n\t}\n\n\t/**\n\t * Starts conversion of a range insertion.\n\t *\n\t * For each node in the range, {@link #event:insert insert event is fired}. For each attribute on each node,\n\t * {@link #event:attribute attribute event is fired}.\n\t *\n\t * @fires insert\n\t * @fires attribute\n\t * @param {module:engine/model/range~Range} range Inserted range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertInsert( range, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create a list of things that can be consumed, consisting of nodes and their attributes.\n\t\tthis.conversionApi.consumable = this._createInsertConsumable( range );\n\n\t\t// Fire a separate insert event for each node and text fragment contained in the range.\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\t\t\tconst itemRange = Range._createFromPositionAndShift( value.previousPosition, value.length );\n\t\t\tconst data = {\n\t\t\t\titem,\n\t\t\t\trange: itemRange\n\t\t\t};\n\n\t\t\tthis._testAndFire( 'insert', data );\n\n\t\t\t// Fire a separate addAttribute event for each attribute that was set on inserted items.\n\t\t\t// This is important because most attributes converters will listen only to add/change/removeAttribute events.\n\t\t\t// If we would not add this part, attributes on inserted nodes would not be converted.\n\t\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\t\tdata.attributeKey = key;\n\t\t\t\tdata.attributeOldValue = null;\n\t\t\t\tdata.attributeNewValue = item.getAttribute( key );\n\n\t\t\t\tthis._testAndFire( `attribute:${ key }`, data );\n\t\t\t}\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Fires conversion of a single node removal. Fires {@link #event:remove remove event} with provided data.\n\t *\n\t * @param {module:engine/model/position~Position} position Position from which node was removed.\n\t * @param {Number} length Offset size of removed node.\n\t * @param {String} name Name of removed node.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertRemove( position, length, name, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\tthis.fire( 'remove:' + name, { position, length }, this.conversionApi );\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Starts conversion of attribute change on given `range`.\n\t *\n\t * For each node in the given `range`, {@link #event:attribute attribute event} is fired with the passed data.\n\t *\n\t * @fires attribute\n\t * @param {module:engine/model/range~Range} range Changed range.\n\t * @param {String} key Key of the attribute that has changed.\n\t * @param {*} oldValue Attribute value before the change or `null` if the attribute has not been set before.\n\t * @param {*} newValue New attribute value or `null` if the attribute has been removed.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertAttribute( range, key, oldValue, newValue, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create a list with attributes to consume.\n\t\tthis.conversionApi.consumable = this._createConsumableForRange( range, `attribute:${ key }` );\n\n\t\t// Create a separate attribute event for each node in the range.\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\t\t\tconst itemRange = Range._createFromPositionAndShift( value.previousPosition, value.length );\n\t\t\tconst data = {\n\t\t\t\titem,\n\t\t\t\trange: itemRange,\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: oldValue,\n\t\t\t\tattributeNewValue: newValue\n\t\t\t};\n\n\t\t\tthis._testAndFire( `attribute:${ key }`, data );\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Starts model selection conversion.\n\t *\n\t * Fires events for given {@link module:engine/model/selection~Selection selection} to start selection conversion.\n\t *\n\t * @fires selection\n\t * @fires addMarker\n\t * @fires attribute\n\t * @param {module:engine/model/selection~Selection} selection Selection to convert.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Markers connected with converted model.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertSelection( selection, markers, writer ) {\n\t\tconst markersAtSelection = Array.from( markers.getMarkersAtPosition( selection.getFirstPosition() ) );\n\n\t\tthis.conversionApi.writer = writer;\n\t\tthis.conversionApi.consumable = this._createSelectionConsumable( selection, markersAtSelection );\n\n\t\tthis.fire( 'selection', { selection }, this.conversionApi );\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const marker of markersAtSelection ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tif ( !shouldMarkerChangeBeConverted( selection.getFirstPosition(), marker, this.conversionApi.mapper ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst data = {\n\t\t\t\titem: selection,\n\t\t\t\tmarkerName: marker.name,\n\t\t\t\tmarkerRange\n\t\t\t};\n\n\t\t\tif ( this.conversionApi.consumable.test( selection, 'addMarker:' + marker.name ) ) {\n\t\t\t\tthis.fire( 'addMarker:' + marker.name, data, this.conversionApi );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of selection.getAttributeKeys() ) {\n\t\t\tconst data = {\n\t\t\t\titem: selection,\n\t\t\t\trange: selection.getFirstRange(),\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: null,\n\t\t\t\tattributeNewValue: selection.getAttribute( key )\n\t\t\t};\n\n\t\t\t// Do not fire event if the attribute has been consumed.\n\t\t\tif ( this.conversionApi.consumable.test( selection, 'attribute:' + data.attributeKey ) ) {\n\t\t\t\tthis.fire( 'attribute:' + data.attributeKey + ':$text', data, this.conversionApi );\n\t\t\t}\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Converts added marker. Fires {@link #event:addMarker addMarker} event for each item\n\t * in marker's range. If range is collapsed single event is dispatched. See event description for more details.\n\t *\n\t * @fires addMarker\n\t * @param {String} markerName Marker name.\n\t * @param {module:engine/model/range~Range} markerRange Marker range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertMarkerAdd( markerName, markerRange, writer ) {\n\t\t// Do not convert if range is in graveyard or not in the document (e.g. in DocumentFragment).\n\t\tif ( !markerRange.root.document || markerRange.root.rootName == '$graveyard' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// In markers' case, event name == consumable name.\n\t\tconst eventName = 'addMarker:' + markerName;\n\n\t\t//\n\t\t// First, fire an event for the whole marker.\n\t\t//\n\t\tconst consumable = new Consumable();\n\t\tconsumable.add( markerRange, eventName );\n\n\t\tthis.conversionApi.consumable = consumable;\n\n\t\tthis.fire( eventName, { markerName, markerRange }, this.conversionApi );\n\n\t\t//\n\t\t// Do not fire events for each item inside the range if the range got consumed.\n\t\t//\n\t\tif ( !consumable.test( markerRange, eventName ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t//\n\t\t// Then, fire an event for each item inside the marker range.\n\t\t//\n\t\tthis.conversionApi.consumable = this._createConsumableForRange( markerRange, eventName );\n\n\t\tfor ( const item of markerRange.getItems() ) {\n\t\t\t// Do not fire event for already consumed items.\n\t\t\tif ( !this.conversionApi.consumable.test( item, eventName ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst data = { item, range: Range._createOn( item ), markerName, markerRange };\n\n\t\t\tthis.fire( eventName, data, this.conversionApi );\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Fires conversion of marker removal. Fires {@link #event:removeMarker removeMarker} event with provided data.\n\t *\n\t * @fires removeMarker\n\t * @param {String} markerName Marker name.\n\t * @param {module:engine/model/range~Range} markerRange Marker range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertMarkerRemove( markerName, markerRange, writer ) {\n\t\t// Do not convert if range is in graveyard or not in the document (e.g. in DocumentFragment).\n\t\tif ( !markerRange.root.document || markerRange.root.rootName == '$graveyard' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.conversionApi.writer = writer;\n\n\t\tthis.fire( 'removeMarker:' + markerName, { markerName, markerRange }, this.conversionApi );\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with values to consume from given range,\n\t * assuming that the range has just been inserted to the model.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Inserted range.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createInsertConsumable( range ) {\n\t\tconst consumable = new Consumable();\n\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\n\t\t\tconsumable.add( item, 'insert' );\n\n\t\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\t\tconsumable.add( item, 'attribute:' + key );\n\t\t\t}\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with values to consume for given range.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Affected range.\n\t * @param {String} type Consumable type.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createConsumableForRange( range, type ) {\n\t\tconst consumable = new Consumable();\n\n\t\tfor ( const item of range.getItems() ) {\n\t\t\tconsumable.add( item, type );\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with selection consumable values.\n\t *\n\t * @private\n\t * @param {module:engine/model/selection~Selection} selection Selection to create consumable from.\n\t * @param {Iterable.<module:engine/model/markercollection~Marker>} markers Markers which contains selection.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createSelectionConsumable( selection, markers ) {\n\t\tconst consumable = new Consumable();\n\n\t\tconsumable.add( selection, 'selection' );\n\n\t\tfor ( const marker of markers ) {\n\t\t\tconsumable.add( selection, 'addMarker:' + marker.name );\n\t\t}\n\n\t\tfor ( const key of selection.getAttributeKeys() ) {\n\t\t\tconsumable.add( selection, 'attribute:' + key );\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Tests passed `consumable` to check whether given event can be fired and if so, fires it.\n\t *\n\t * @private\n\t * @fires insert\n\t * @fires attribute\n\t * @param {String} type Event type.\n\t * @param {Object} data Event data.\n\t */\n\t_testAndFire( type, data ) {\n\t\tif ( !this.conversionApi.consumable.test( data.item, type ) ) {\n\t\t\t// Do not fire event if the item was consumed.\n\t\t\treturn;\n\t\t}\n\n\t\tconst name = data.item.name || '$text';\n\n\t\tthis.fire( type + ':' + name, data, this.conversionApi );\n\t}\n\n\t/**\n\t * Clears conversion API object.\n\t *\n\t * @private\n\t */\n\t_clearConversionApi() {\n\t\tdelete this.conversionApi.writer;\n\t\tdelete this.conversionApi.consumable;\n\t}\n\n\t/**\n\t * Fired for inserted nodes.\n\t *\n\t * `insert` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `insert:name`. `name` is either `'$text'`, when {@link module:engine/model/text~Text a text node} has been inserted,\n\t * or {@link module:engine/model/element~Element#name name} of inserted element.\n\t *\n\t * This way listeners can either listen to a general `insert` event or specific event (for example `insert:paragraph`).\n\t *\n\t * @event insert\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item} data.item Inserted item.\n\t * @param {module:engine/model/range~Range} data.range Range spanning over inserted item.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired for removed nodes.\n\t *\n\t * `remove` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `remove:name`. `name` is either `'$text'`, when {@link module:engine/model/text~Text a text node} has been removed,\n\t * or the {@link module:engine/model/element~Element#name name} of removed element.\n\t *\n\t * This way listeners can either listen to a general `remove` event or specific event (for example `remove:paragraph`).\n\t *\n\t * @event remove\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/position~Position} data.position Position from which the node has been removed.\n\t * @param {Number} data.length Offset size of the removed node.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired in the following cases:\n\t *\n\t * * when an attribute has been added, changed, or removed from a node,\n\t * * when a node with an attribute is inserted,\n\t * * when collapsed model selection attribute is converted.\n\t *\n\t * `attribute` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `attribute:attributeKey:name`. `attributeKey` is the key of added/changed/removed attribute.\n\t * `name` is either `'$text'` if change was on {@link module:engine/model/text~Text a text node},\n\t * or the {@link module:engine/model/element~Element#name name} of element which attribute has changed.\n\t *\n\t * This way listeners can either listen to a general `attribute:bold` event or specific event (for example `attribute:src:image`).\n\t *\n\t * @event attribute\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item|module:engine/model/documentselection~DocumentSelection} data.item Changed item\n\t * or converted selection.\n\t * @param {module:engine/model/range~Range} data.range Range spanning over changed item or selection range.\n\t * @param {String} data.attributeKey Attribute key.\n\t * @param {*} data.attributeOldValue Attribute value before the change. This is `null` when selection attribute is converted.\n\t * @param {*} data.attributeNewValue New attribute value.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired for {@link module:engine/model/selection~Selection selection} changes.\n\t *\n\t * @event selection\n\t * @param {module:engine/model/selection~Selection} selection Selection that is converted.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired when a new marker is added to the model. Also fired when collapsed model selection that is inside marker is converted.\n\t *\n\t * `addMarker` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `addMarker:markerName`. By specifying certain marker names, you can make the events even more gradual. For example,\n\t * if markers are named `foo:abc`, `foo:bar`, then it is possible to listen to `addMarker:foo` or `addMarker:foo:abc` and\n\t * `addMarker:foo:bar` events.\n\t *\n\t * If the marker range is not collapsed:\n\t *\n\t * * the event is fired for each item in the marker range one by one,\n\t * * `conversionApi.consumable` includes each item of the marker range and the consumable value is same as event name.\n\t *\n\t * If the marker range is collapsed:\n\t *\n\t * * there is only one event,\n\t * * `conversionApi.consumable` includes marker range with event name.\n\t *\n\t * If selection inside a marker is converted:\n\t *\n\t * * there is only one event,\n\t * * `conversionApi.consumable` includes selection instance with event name.\n\t *\n\t * @event addMarker\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection} data.item Item inside the new marker or\n\t * the selection that is being converted.\n\t * @param {module:engine/model/range~Range} [data.range] Range spanning over converted item. Available only in marker conversion, if\n\t * the marker range was not collapsed.\n\t * @param {module:engine/model/range~Range} data.markerRange Marker range.\n\t * @param {String} data.markerName Marker name.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired when marker is removed from the model.\n\t *\n\t * `removeMarker` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `removeMarker:markerName`. By specifying certain marker names, you can make the events even more gradual. For example,\n\t * if markers are named `foo:abc`, `foo:bar`, then it is possible to listen to `removeMarker:foo` or `removeMarker:foo:abc` and\n\t * `removeMarker:foo:bar` events.\n\t *\n\t * @event removeMarker\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/range~Range} data.markerRange Marker range.\n\t * @param {String} data.markerName Marker name.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n}\n\nmix( DowncastDispatcher, EmitterMixin );\n\n// Helper function, checks whether change of `marker` at `modelPosition` should be converted. Marker changes are not\n// converted if they happen inside an element with custom conversion method.\n//\n// @param {module:engine/model/position~Position} modelPosition\n// @param {module:engine/model/markercollection~Marker} marker\n// @param {module:engine/conversion/mapper~Mapper} mapper\n// @returns {Boolean}\nfunction shouldMarkerChangeBeConverted( modelPosition, marker, mapper ) {\n\tconst range = marker.getRange();\n\tconst ancestors = Array.from( modelPosition.getAncestors() );\n\tancestors.shift(); // Remove root element. It cannot be passed to `model.Range#containsItem`.\n\tancestors.reverse();\n\n\tconst hasCustomHandling = ancestors.some( element => {\n\t\tif ( range.containsItem( element ) ) {\n\t\t\tconst viewElement = mapper.toViewElement( element );\n\n\t\t\treturn !!viewElement.getCustomProperty( 'addHighlight' );\n\t\t}\n\t} );\n\n\treturn !hasCustomHandling;\n}\n\n/**\n * Conversion interface that is registered for given {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n * and is passed as one of parameters when {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher dispatcher}\n * fires it's events.\n *\n * @interface module:engine/conversion/downcastdispatcher~DowncastConversionApi\n */\n\n/**\n * The {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} instance.\n *\n * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher} #dispatcher\n */\n\n/**\n * Stores information about what parts of processed model item are still waiting to be handled. After a piece of model item\n * was converted, appropriate consumable value should be {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed}.\n *\n * @member {module:engine/conversion/modelconsumable~ModelConsumable} #consumable\n */\n\n/**\n * The {@link module:engine/conversion/mapper~Mapper} instance.\n *\n * @member {module:engine/conversion/mapper~Mapper} #mapper\n */\n\n/**\n * The {@link module:engine/view/downcastwriter~DowncastWriter} instance used to manipulate data during conversion.\n *\n * @member {module:engine/view/downcastwriter~DowncastWriter} #writer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/selection\n */\n\nimport Position from './position';\nimport Element from './element';\nimport Node from './node';\nimport Range from './range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n/**\n * Selection is a set of {@link module:engine/model/range~Range ranges}. It has a direction specified by its\n * {@link module:engine/model/selection~Selection#anchor anchor} and {@link module:engine/model/selection~Selection#focus focus}\n * (it can be {@link module:engine/model/selection~Selection#isBackward forward or backward}).\n * Additionally, selection may have its own attributes (think – whether text typed in in this selection\n * should have those attributes – e.g. whether you type a bolded text).\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Selection {\n\t/**\n\t * Creates a new selection instance based on the given {@link module:engine/model/selection~Selectable selectable}\n\t * or creates an empty selection if no arguments were passed.\n\t *\n\t *\t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\tconst selection = writer.createSelection( documentSelection );\n\t *\n\t *\t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates selection at the given offset in the given element.\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/model/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * Selection's constructor allow passing additional options (`'backward'`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tconstructor( selectable, placeOrOffset, options ) {\n\t\t/**\n\t\t * Specifies whether the last added range was added as a backward or forward range.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._lastRangeBackward = false;\n\n\t\t/**\n\t\t * Stores selection ranges.\n\t\t *\n\t\t * @protected\n\t\t * @type {Array.<module:engine/model/range~Range>}\n\t\t */\n\t\tthis._ranges = [];\n\n\t\t/**\n\t\t * List of attributes set on current selection.\n\t\t *\n\t\t * @protected\n\t\t * @type {Map.<String,*>}\n\t\t */\n\t\tthis._attrs = new Map();\n\n\t\tif ( selectable ) {\n\t\t\tthis.setTo( selectable, placeOrOffset, options );\n\t\t}\n\t}\n\n\t/**\n\t * Selection anchor. Anchor is the position from which the selection was started. If a user is making a selection\n\t * by dragging the mouse, the anchor is where the user pressed the mouse button (the beggining of the selection).\n\t *\n\t * Anchor and {@link #focus} define the direction of the selection, which is important\n\t * when expanding/shrinking selection. The focus moves, while the anchor should remain in the same place.\n\t *\n\t * Anchor is always set to the {@link module:engine/model/range~Range#start start} or\n\t * {@link module:engine/model/range~Range#end end} position of the last of selection's ranges. Whether it is\n\t * the `start` or `end` depends on the specified `options.backward`. See the {@link #setTo `setTo()`} method.\n\t *\n\t * May be set to `null` if there are no ranges in the selection.\n\t *\n\t * @see #focus\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget anchor() {\n\t\tif ( this._ranges.length > 0 ) {\n\t\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\n\t\t\treturn this._lastRangeBackward ? range.end : range.start;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Selection focus. Focus is the position where the selection ends. If a user is making a selection\n\t * by dragging the mouse, the focus is where the mouse cursor is.\n\t *\n\t * May be set to `null` if there are no ranges in the selection.\n\t *\n\t * @see #anchor\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget focus() {\n\t\tif ( this._ranges.length > 0 ) {\n\t\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\n\t\t\treturn this._lastRangeBackward ? range.start : range.end;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Whether the selection is collapsed. Selection is collapsed when there is exactly one range in it\n\t * and it is collapsed.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\tconst length = this._ranges.length;\n\n\t\tif ( length === 1 ) {\n\t\t\treturn this._ranges[ 0 ].isCollapsed;\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the number of ranges in the selection.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._ranges.length;\n\t}\n\n\t/**\n\t * Specifies whether the selection's {@link #focus} precedes the selection's {@link #anchor}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn !this.isCollapsed && this._lastRangeBackward;\n\t}\n\n\t/**\n\t * Checks whether this selection is equal to the given selection. Selections are equal if they have the same directions,\n\t * the same number of ranges and all ranges from one selection equal to ranges from the another selection.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\tif ( this.rangeCount != otherSelection.rangeCount ) {\n\t\t\treturn false;\n\t\t} else if ( this.rangeCount === 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( !this.anchor.isEqual( otherSelection.anchor ) || !this.focus.isEqual( otherSelection.focus ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tfor ( const thisRange of this._ranges ) {\n\t\t\tlet found = false;\n\n\t\t\tfor ( const otherRange of otherSelection._ranges ) {\n\t\t\t\tif ( thisRange.isEqual( otherRange ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns an iterable object that iterates over copies of selection ranges.\n\t *\n\t * @returns {Iterable.<module:engine/model/range~Range>}\n\t */\n\t* getRanges() {\n\t\tfor ( const range of this._ranges ) {\n\t\t\tyield new Range( range.start, range.end );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a copy of the first range in the selection.\n\t * First range is the one which {@link module:engine/model/range~Range#start start} position\n\t * {@link module:engine/model/position~Position#isBefore is before} start position of all other ranges\n\t * (not to confuse with the first range added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\tlet first = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !first || range.start.isBefore( first.start ) ) {\n\t\t\t\tfirst = range;\n\t\t\t}\n\t\t}\n\n\t\treturn first ? new Range( first.start, first.end ) : null;\n\t}\n\n\t/**\n\t * Returns a copy of the last range in the selection.\n\t * Last range is the one which {@link module:engine/model/range~Range#end end} position\n\t * {@link module:engine/model/position~Position#isAfter is after} end position of all other ranges (not to confuse with the range most\n\t * recently added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\tlet last = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !last || range.end.isAfter( last.end ) ) {\n\t\t\t\tlast = range;\n\t\t\t}\n\t\t}\n\n\t\treturn last ? new Range( last.start, last.end ) : null;\n\t}\n\n\t/**\n\t * Returns the first position in the selection.\n\t * First position is the position that {@link module:engine/model/position~Position#isBefore is before}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\tconst first = this.getFirstRange();\n\n\t\treturn first ? first.start.clone() : null;\n\t}\n\n\t/**\n\t * Returns the last position in the selection.\n\t * Last position is the position that {@link module:engine/model/position~Position#isAfter is after}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\tconst lastRange = this.getLastRange();\n\n\t\treturn lastRange ? lastRange.end.clone() : null;\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable}.\n\t *\n\t *\t\t// Removes all selection's ranges.\n\t *\t\tselection.setTo( null );\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tselection.setTo( ranges );\n\t *\n\t *\t\t// Sets selection to other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tselection.setTo( otherSelection );\n\t *\n\t *\t\t// Sets selection to the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = new DocumentSelection( doc );\n\t *\t\tselection.setTo( documentSelection );\n\t *\n\t *\t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tselection.setTo( position );\n\t *\n\t *\t\t// Sets collapsed selection at the position of the given node and an offset.\n\t *\t\tselection.setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t *\t\tselection.setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tselection.setTo( paragraph, 'on' );\n\t *\n\t * `Selection#setTo()`' method allow passing additional options (`backward`) as the last argument.\n\t *\n\t *\t\t// Sets backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tsetTo( selectable, placeOrOffset, options ) {\n\t\tif ( selectable === null ) {\n\t\t\tthis._setRanges( [] );\n\t\t} else if ( selectable instanceof Selection ) {\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t} else if ( selectable && typeof selectable.getRanges == 'function' ) {\n\t\t\t// We assume that the selectable is a DocumentSelection.\n\t\t\t// It can't be imported here, because it would lead to circular imports.\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t} else if ( selectable instanceof Range ) {\n\t\t\tthis._setRanges( [ selectable ], !!placeOrOffset && !!placeOrOffset.backward );\n\t\t} else if ( selectable instanceof Position ) {\n\t\t\tthis._setRanges( [ new Range( selectable ) ] );\n\t\t} else if ( selectable instanceof Node ) {\n\t\t\tconst backward = !!options && !!options.backward;\n\t\t\tlet range;\n\n\t\t\tif ( placeOrOffset == 'in' ) {\n\t\t\t\trange = Range._createIn( selectable );\n\t\t\t} else if ( placeOrOffset == 'on' ) {\n\t\t\t\trange = Range._createOn( selectable );\n\t\t\t} else if ( placeOrOffset !== undefined ) {\n\t\t\t\trange = new Range( Position._createAt( selectable, placeOrOffset ) );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * selection.setTo requires the second parameter when the first parameter is a node.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-setTo-required-second-parameter\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-setTo-required-second-parameter: ' +\n\t\t\t\t\t'selection.setTo requires the second parameter when the first parameter is a node.',\n\t\t\t\t\t[ this, selectable ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tthis._setRanges( [ range ], backward );\n\t\t} else if ( isIterable( selectable ) ) {\n\t\t\t// We assume that the selectable is an iterable of ranges.\n\t\t\tthis._setRanges( selectable, placeOrOffset && !!placeOrOffset.backward );\n\t\t} else {\n\t\t\t/**\n\t\t\t * Cannot set the selection to the given place.\n\t\t\t *\n\t\t\t * Invalid parameters were specified when setting the selection. Common issues:\n\t\t\t *\n\t\t\t * * A {@link module:engine/model/textproxy~TextProxy} instance was passed instead of\n\t\t\t * a real {@link module:engine/model/text~Text}.\n\t\t\t * * View nodes were passed instead of model nodes.\n\t\t\t * * `null`/`undefined` was passed.\n\t\t\t *\n\t\t\t * @error model-selection-setTo-not-selectable\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-selection-setTo-not-selectable: Cannot set the selection to the given place.',\n\t\t\t\t[ this, selectable ]\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * Replaces all ranges that were added to the selection with given array of ranges. Last range of the array\n\t * is treated like the last added range and is used to set {@link module:engine/model/selection~Selection#anchor} and\n\t * {@link module:engine/model/selection~Selection#focus}. Accepts a flag describing in which direction the selection is made.\n\t *\n\t * @protected\n\t * @fires change:range\n\t * @param {Iterable.<module:engine/model/range~Range>} newRanges Ranges to set.\n\t * @param {Boolean} [isLastBackward=false] Flag describing if last added range was selected forward - from start to end (`false`)\n\t * or backward - from end to start (`true`).\n\t */\n\t_setRanges( newRanges, isLastBackward = false ) {\n\t\tnewRanges = Array.from( newRanges );\n\n\t\t// Check whether there is any range in new ranges set that is different than all already added ranges.\n\t\tconst anyNewRange = newRanges.some( newRange => {\n\t\t\tif ( !( newRange instanceof Range ) ) {\n\t\t\t\t/**\n\t\t\t\t * Selection range set to an object that is not an instance of {@link module:engine/model/range~Range}.\n\t\t\t\t *\n\t\t\t\t * Only {@link module:engine/model/range~Range} instances can be used to set a selection.\n\t\t\t\t * Common mistakes leading to this error are:\n\t\t\t\t *\n\t\t\t\t * * using DOM `Range` object,\n\t\t\t\t * * incorrect CKEditor 5 installation with multiple `ckeditor5-engine` packages having different versions.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-set-ranges-not-range\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-set-ranges-not-range: ' +\n\t\t\t\t\t'Selection range set to an object that is not an instance of model.Range.',\n\t\t\t\t\t[ this, newRanges ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn this._ranges.every( oldRange => {\n\t\t\t\treturn !oldRange.isEqual( newRange );\n\t\t\t} );\n\t\t} );\n\n\t\t// Don't do anything if nothing changed.\n\t\tif ( newRanges.length === this._ranges.length && !anyNewRange ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._removeAllRanges();\n\n\t\tfor ( const range of newRanges ) {\n\t\t\tthis._pushRange( range );\n\t\t}\n\n\t\tthis._lastRangeBackward = !!isLastBackward;\n\n\t\tthis.fire( 'change:range', { directChange: true } );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/selection~Selection#focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link module:engine/model/writer~Writer#createPositionAt writer.createPositionAt()} parameters.\n\t *\n\t * @fires change:range\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tsetFocus( itemOrPosition, offset ) {\n\t\tif ( this.anchor === null ) {\n\t\t\t/**\n\t\t\t * Cannot set selection focus if there are no ranges in selection.\n\t\t\t *\n\t\t\t * @error model-selection-setFocus-no-ranges\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.',\n\t\t\t\t[ this, itemOrPosition ]\n\t\t\t);\n\t\t}\n\n\t\tconst newFocus = Position._createAt( itemOrPosition, offset );\n\n\t\tif ( newFocus.compareWith( this.focus ) == 'same' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst anchor = this.anchor;\n\n\t\tif ( this._ranges.length ) {\n\t\t\tthis._popRange();\n\t\t}\n\n\t\tif ( newFocus.compareWith( anchor ) == 'before' ) {\n\t\t\tthis._pushRange( new Range( newFocus, anchor ) );\n\t\t\tthis._lastRangeBackward = true;\n\t\t} else {\n\t\t\tthis._pushRange( new Range( anchor, newFocus ) );\n\t\t\tthis._lastRangeBackward = false;\n\t\t}\n\n\t\tthis.fire( 'change:range', { directChange: true } );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on the selection.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._attrs.entries();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._attrs.keys();\n\t}\n\n\t/**\n\t * Checks if the selection has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on selection, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the selection.\n\t *\n\t * If given attribute was set on the selection, fires the {@link #event:change:range} event with\n\t * removed attribute key.\n\t *\n\t * @fires change:attribute\n\t * @param {String} key Key of attribute to remove.\n\t */\n\tremoveAttribute( key ) {\n\t\tif ( this.hasAttribute( key ) ) {\n\t\t\tthis._attrs.delete( key );\n\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: [ key ], directChange: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Sets attribute on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * If the attribute value has changed, fires the {@link #event:change:range} event with\n\t * the attribute key.\n\t *\n\t * @fires change:attribute\n\t * @param {String} key Key of attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\tsetAttribute( key, value ) {\n\t\tif ( this.getAttribute( key ) !== value ) {\n\t\t\tthis._attrs.set( key, value );\n\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: [ key ], directChange: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/model/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\tif ( this.rangeCount !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst range = this.getFirstRange();\n\t\tconst nodeAfterStart = range.start.nodeAfter;\n\t\tconst nodeBeforeEnd = range.end.nodeBefore;\n\n\t\treturn ( nodeAfterStart instanceof Element && nodeAfterStart == nodeBeforeEnd ) ? nodeAfterStart : null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'model:selection' ); // -> true\n\t *\n\t *\t\tselection.is( 'view:selection' ); // -> false\n\t *\t\tselection.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' || type == 'model:selection';\n\t}\n\n\t/**\n\t * Gets elements of type {@link module:engine/model/schema~Schema#isBlock \"block\"} touched by the selection.\n\t *\n\t * This method's result can be used for example to apply block styling to all blocks covered by this selection.\n\t *\n\t * **Note:** `getSelectedBlocks()` returns blocks that are nested in other non-block elements\n\t * but will not return blocks nested in other blocks.\n\t *\n\t * In this case the function will return exactly all 3 paragraphs (note: `<blockQuote>` is not a block itself):\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<blockQuote>\n\t *\t\t\t<paragraph>b</paragraph>\n\t *\t\t</blockQuote>\n\t *\t\t<paragraph>c]d</paragraph>\n\t *\n\t * In this case the paragraph will also be returned, despite the collapsed selection:\n\t *\n\t *\t\t<paragraph>[]a</paragraph>\n\t *\n\t * In such a scenario, however, only blocks A, B & E will be returned as blocks C & D are nested in block B:\n\t *\n\t *\t\t[<blockA></blockA>\n\t *\t\t<blockB>\n\t *\t\t\t<blockC></blockC>\n\t *\t\t\t<blockD></blockD>\n\t *\t\t</blockB>\n\t *\t\t<blockE></blockE>]\n\t *\n\t * If the selection is inside a block all the inner blocks (A & B) are returned:\n\t *\n\t * \t\t<block>\n\t *\t\t\t<blockA>[a</blockA>\n\t * \t\t\t<blockB>b]</blockB>\n\t * \t\t</block>\n\t *\n\t * **Special case**: If a selection ends at the beginning of a block, that block is not returned as from user perspective\n\t * this block wasn't selected. See [#984](https://github.com/ckeditor/ckeditor5-engine/issues/984) for more details.\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<paragraph>b</paragraph>\n\t *\t\t<paragraph>]c</paragraph> // this block will not be returned\n\t *\n\t * @returns {Iterable.<module:engine/model/element~Element>}\n\t */\n\t* getSelectedBlocks() {\n\t\tconst visited = new WeakSet();\n\n\t\tfor ( const range of this.getRanges() ) {\n\t\t\t// Get start block of range in case of a collapsed range.\n\t\t\tconst startBlock = getParentBlock( range.start, visited );\n\n\t\t\tif ( startBlock && isTopBlockInRange( startBlock, range ) ) {\n\t\t\t\tyield startBlock;\n\t\t\t}\n\n\t\t\tfor ( const value of range.getWalker() ) {\n\t\t\t\tconst block = value.item;\n\n\t\t\t\tif ( value.type == 'elementEnd' && isUnvisitedTopBlock( block, visited, range ) ) {\n\t\t\t\t\tyield block;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tconst endBlock = getParentBlock( range.end, visited );\n\n\t\t\t// #984. Don't return the end block if the range ends right at its beginning.\n\t\t\tif ( endBlock && !range.end.isTouching( Position._createAt( endBlock, 0 ) ) && isTopBlockInRange( endBlock, range ) ) {\n\t\t\t\tyield endBlock;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether the selection contains the entire content of the given element. This means that selection must start\n\t * at a position {@link module:engine/model/position~Position#isTouching touching} the element's start and ends at position\n\t * touching the element's end.\n\t *\n\t * By default, this method will check whether the entire content of the selection's current root is selected.\n\t * Useful to check if e.g. the user has just pressed <kbd>Ctrl</kbd> + <kbd>A</kbd>.\n\t *\n\t * @param {module:engine/model/element~Element} [element=this.anchor.root]\n\t * @returns {Boolean}\n\t */\n\tcontainsEntireContent( element = this.anchor.root ) {\n\t\tconst limitStartPosition = Position._createAt( element, 0 );\n\t\tconst limitEndPosition = Position._createAt( element, 'end' );\n\n\t\treturn limitStartPosition.isTouching( this.getFirstPosition() ) &&\n\t\t\tlimitEndPosition.isTouching( this.getLastPosition() );\n\t}\n\n\t/**\n\t * Adds given range to internal {@link #_ranges ranges array}. Throws an error\n\t * if given range is intersecting with any range that is already stored in this selection.\n\t *\n\t * @protected\n\t * @param {module:engine/model/range~Range} range Range to add.\n\t */\n\t_pushRange( range ) {\n\t\tthis._checkRange( range );\n\t\tthis._ranges.push( new Range( range.start, range.end ) );\n\t}\n\n\t/**\n\t * Checks if given range intersects with ranges that are already in the selection. Throws an error if it does.\n\t *\n\t * @protected\n\t * @param {module:engine/model/range~Range} range Range to check.\n\t */\n\t_checkRange( range ) {\n\t\tfor ( let i = 0; i < this._ranges.length; i++ ) {\n\t\t\tif ( range.isIntersecting( this._ranges[ i ] ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to add a range that intersects with another range in the selection.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-range-intersects\n\t\t\t\t * @param {module:engine/model/range~Range} addedRange Range that was added to the selection.\n\t\t\t\t * @param {module:engine/model/range~Range} intersectingRange Range in the selection that intersects with `addedRange`.\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-range-intersects: Trying to add a range that intersects with another range in the selection.',\n\t\t\t\t\t[ this, range ],\n\t\t\t\t\t{ addedRange: range, intersectingRange: this._ranges[ i ] }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Deletes ranges from internal range array. Uses {@link #_popRange _popRange} to\n\t * ensure proper ranges removal.\n\t *\n\t * @protected\n\t */\n\t_removeAllRanges() {\n\t\twhile ( this._ranges.length > 0 ) {\n\t\t\tthis._popRange();\n\t\t}\n\t}\n\n\t/**\n\t * Removes most recently added range from the selection.\n\t *\n\t * @protected\n\t */\n\t_popRange() {\n\t\tthis._ranges.pop();\n\t}\n\n\t/**\n\t * Fired when selection range(s) changed.\n\t *\n\t * @event change:range\n\t * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n\t * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n\t * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its position\n\t * was directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n\t * changed because the structure of the model has been changed (which means an indirect change).\n\t * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n\t * which mean that they are not updated once the document changes.\n\t */\n\n\t/**\n\t * Fired when selection attribute changed.\n\t *\n\t * @event change:attribute\n\t * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n\t * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n\t * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its attributes\n\t * were directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n\t * changed in the model and its attributes were refreshed (which means an indirect change).\n\t * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n\t * which mean that they are not updated once the document changes.\n\t * @param {Array.<String>} attributeKeys Array containing keys of attributes that changed.\n\t */\n}\n\nmix( Selection, EmitterMixin );\n\n// Checks whether the given element extends $block in the schema and has a parent (is not a root).\n// Marks it as already visited.\nfunction isUnvisitedBlock( element, visited ) {\n\tif ( visited.has( element ) ) {\n\t\treturn false;\n\t}\n\n\tvisited.add( element );\n\n\treturn element.document.model.schema.isBlock( element ) && element.parent;\n}\n\n// Checks if the given element is a $block was not previously visited and is a top block in a range.\nfunction isUnvisitedTopBlock( element, visited, range ) {\n\treturn isUnvisitedBlock( element, visited ) && isTopBlockInRange( element, range );\n}\n\n// Finds the lowest element in position's ancestors which is a block.\n// It will search until first ancestor that is a limit element.\n// Marks all ancestors as already visited to not include any of them later on.\nfunction getParentBlock( position, visited ) {\n\tconst schema = position.parent.document.model.schema;\n\n\tconst ancestors = position.parent.getAncestors( { parentFirst: true, includeSelf: true } );\n\n\tlet hasParentLimit = false;\n\n\tconst block = ancestors.find( element => {\n\t\t// Stop searching after first parent node that is limit element.\n\t\tif ( hasParentLimit ) {\n\t\t\treturn false;\n\t\t}\n\n\t\thasParentLimit = schema.isLimit( element );\n\n\t\treturn !hasParentLimit && isUnvisitedBlock( element, visited );\n\t} );\n\n\t// Mark all ancestors of this position's parent, because find() might've stopped early and\n\t// the found block may be a child of another block.\n\tancestors.forEach( element => visited.add( element ) );\n\n\treturn block;\n}\n\n// Checks if the blocks is not nested in other block inside a range.\n//\n// @param {module:engine/model/elmenent~Element} block Block to check.\n// @param {module:engine/model/range~Range} range Range to check.\nfunction isTopBlockInRange( block, range ) {\n\tconst parentBlock = findAncestorBlock( block );\n\n\tif ( !parentBlock ) {\n\t\treturn true;\n\t}\n\n\t// Add loose flag to check as parentRange can be equal to range.\n\tconst isParentInRange = range.containsRange( Range._createOn( parentBlock ), true );\n\n\treturn !isParentInRange;\n}\n\n// Returns first ancestor block of a node.\n//\n// @param {module:engine/model/node~Node} node\n// @returns {module:engine/model/node~Node|undefined}\nfunction findAncestorBlock( node ) {\n\tconst schema = node.document.model.schema;\n\n\tlet parent = node.parent;\n\n\twhile ( parent ) {\n\t\tif ( schema.isBlock( parent ) ) {\n\t\t\treturn parent;\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n}\n\n/**\n * An entity that is used to set selection.\n *\n * See also {@link module:engine/model/selection~Selection#setTo}\n *\n * @typedef {\n * module:engine/model/selection~Selection|\n * module:engine/model/documentselection~DocumentSelection|\n * module:engine/model/position~Position|\n * module:engine/model/range~Range|\n * module:engine/model/node~Node|\n * Iterable.<module:engine/model/range~Range>|\n * null\n * } module:engine/model/selection~Selectable\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/liverange\n */\n\nimport Range from './range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * `LiveRange` is a type of {@link module:engine/model/range~Range Range}\n * that updates itself as {@link module:engine/model/document~Document document}\n * is changed through operations. It may be used as a bookmark.\n *\n * **Note:** Be very careful when dealing with `LiveRange`. Each `LiveRange` instance bind events that might\n * have to be unbound. Use {@link module:engine/model/liverange~LiveRange#detach detach} whenever you don't need `LiveRange` anymore.\n */\nexport default class LiveRange extends Range {\n\t/**\n\t * Creates a live range.\n\t *\n\t * @see module:engine/model/range~Range\n\t */\n\tconstructor( start, end ) {\n\t\tsuper( start, end );\n\n\t\tbindWithDocument.call( this );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by `LiveRange`. Use it whenever you don't need `LiveRange` instance\n\t * anymore (i.e. when leaving scope in which it was declared or before re-assigning variable that was\n\t * referring to it).\n\t */\n\tdetach() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tliveRange.is( 'range' ); // -> true\n\t *\t\tliveRange.is( 'model:range' ); // -> true\n\t *\t\tliveRange.is( 'liveRange' ); // -> true\n\t *\t\tliveRange.is( 'model:liveRange' ); // -> true\n\t *\n\t *\t\tliveRange.is( 'view:range' ); // -> false\n\t *\t\tliveRange.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'liveRange' || type == 'model:liveRange' || super.is( type );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/range~Range range instance} that is equal to this live range.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\ttoRange() {\n\t\treturn new Range( this.start, this.end );\n\t}\n\n\t/**\n\t * Creates a `LiveRange` instance that is equal to the given range.\n\t *\n\t * @param {module:engine/model/range~Range} range\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\tstatic fromRange( range ) {\n\t\treturn new LiveRange( range.start, range.end );\n\t}\n\n\t/**\n\t * @see module:engine/model/range~Range._createIn\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createIn\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * @see module:engine/model/range~Range._createOn\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createOn\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * @see module:engine/model/range~Range._createFromPositionAndShift\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createFromPositionAndShift\n\t * @param {module:engine/model/position~Position} position\n\t * @param {Number} shift\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * Fired when `LiveRange` instance boundaries have changed due to changes in the\n\t * {@link module:engine/model/document~Document document}.\n\t *\n\t * @event change:range\n\t * @param {module:engine/model/range~Range} oldRange Range with start and end position equal to start and end position of this live\n\t * range before it got changed.\n\t * @param {Object} data Object with additional information about the change.\n\t * @param {module:engine/model/position~Position|null} data.deletionPosition Source position for remove and merge changes.\n\t * Available if the range was moved to the graveyard root, `null` otherwise.\n\t */\n\n\t/**\n\t * Fired when `LiveRange` instance boundaries have not changed after a change in {@link module:engine/model/document~Document document}\n\t * but the change took place inside the range, effectively changing its content.\n\t *\n\t * @event change:content\n\t * @param {module:engine/model/range~Range} range Range with start and end position equal to start and end position of\n\t * change range.\n\t * @param {Object} data Object with additional information about the change.\n\t * @param {null} data.deletionPosition Due to the nature of this event, this property is always set to `null`. It is passed\n\t * for compatibility with the {@link module:engine/model/liverange~LiveRange#event:change:range} event.\n\t */\n}\n\n// Binds this `LiveRange` to the {@link module:engine/model/document~Document document}\n// that owns this range's {@link module:engine/model/range~Range#root root}.\n//\n// @private\nfunction bindWithDocument() {\n\tthis.listenTo(\n\t\tthis.root.document.model,\n\t\t'applyOperation',\n\t\t( event, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\ttransform.call( this, operation );\n\t\t},\n\t\t{ priority: 'low' }\n\t);\n}\n\n// Updates this range accordingly to the updates applied to the model. Bases on change events.\n//\n// @private\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\nfunction transform( operation ) {\n\t// Transform the range by the operation. Join the result ranges if needed.\n\tconst ranges = this.getTransformedByOperation( operation );\n\tconst result = Range._createFromRanges( ranges );\n\n\tconst boundariesChanged = !result.isEqual( this );\n\tconst contentChanged = doesOperationChangeRangeContent( this, operation );\n\n\tlet deletionPosition = null;\n\n\tif ( boundariesChanged ) {\n\t\t// If range boundaries have changed, fire `change:range` event.\n\t\t//\n\t\tif ( result.root.rootName == '$graveyard' ) {\n\t\t\t// If the range was moved to the graveyard root, set `deletionPosition`.\n\t\t\tif ( operation.type == 'remove' ) {\n\t\t\t\tdeletionPosition = operation.sourcePosition;\n\t\t\t} else {\n\t\t\t\t// Merge operation.\n\t\t\t\tdeletionPosition = operation.deletionPosition;\n\t\t\t}\n\t\t}\n\n\t\tconst oldRange = this.toRange();\n\n\t\tthis.start = result.start;\n\t\tthis.end = result.end;\n\n\t\tthis.fire( 'change:range', oldRange, { deletionPosition } );\n\t} else if ( contentChanged ) {\n\t\t// If range boundaries have not changed, but there was change inside the range, fire `change:content` event.\n\t\tthis.fire( 'change:content', this.toRange(), { deletionPosition } );\n\t}\n}\n\n// Checks whether given operation changes something inside the range (even if it does not change boundaries).\n//\n// @private\n// @param {module:engine/model/range~Range} range Range to check.\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\n// @returns {Boolean}\nfunction doesOperationChangeRangeContent( range, operation ) {\n\tswitch ( operation.type ) {\n\t\tcase 'insert':\n\t\t\treturn range.containsPosition( operation.position );\n\t\tcase 'move':\n\t\tcase 'remove':\n\t\tcase 'reinsert':\n\t\tcase 'merge':\n\t\t\treturn range.containsPosition( operation.sourcePosition ) ||\n\t\t\t\trange.start.isEqual( operation.sourcePosition ) ||\n\t\t\t\trange.containsPosition( operation.targetPosition );\n\t\tcase 'split':\n\t\t\treturn range.containsPosition( operation.splitPosition ) || range.containsPosition( operation.insertionPosition );\n\t}\n\n\treturn false;\n}\n\nmix( LiveRange, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/documentselection\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\nimport Selection from './selection';\nimport LiveRange from './liverange';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\n\nconst storePrefix = 'selection:';\n\n/**\n * `DocumentSelection` is a special selection which is used as the\n * {@link module:engine/model/document~Document#selection document's selection}.\n * There can be only one instance of `DocumentSelection` per document.\n *\n * Document selection can only be changed by using the {@link module:engine/model/writer~Writer} instance\n * inside the {@link module:engine/model/model~Model#change `change()`} block, as it provides a secure way to modify model.\n *\n * `DocumentSelection` is automatically updated upon changes in the {@link module:engine/model/document~Document document}\n * to always contain valid ranges. Its attributes are inherited from the text unless set explicitly.\n *\n * Differences between {@link module:engine/model/selection~Selection} and `DocumentSelection` are:\n * * there is always a range in `DocumentSelection` - even if no ranges were added there is a \"default range\"\n * present in the selection,\n * * ranges added to this selection updates automatically when the document changes,\n * * attributes of `DocumentSelection` are updated automatically according to selection ranges.\n *\n * Since `DocumentSelection` uses {@link module:engine/model/liverange~LiveRange live ranges}\n * and is updated when {@link module:engine/model/document~Document document}\n * changes, it cannot be set on {@link module:engine/model/node~Node nodes}\n * that are inside {@link module:engine/model/documentfragment~DocumentFragment document fragment}.\n * If you need to represent a selection in document fragment,\n * use {@link module:engine/model/selection~Selection Selection class} instead.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class DocumentSelection {\n\t/**\n\t * Creates an empty live selection for given {@link module:engine/model/document~Document}.\n\t *\n\t * @param {module:engine/model/document~Document} doc Document which owns this selection.\n\t */\n\tconstructor( doc ) {\n\t\t/**\n\t\t * Selection used internally by that class (`DocumentSelection` is a proxy to that selection).\n\t\t *\n\t\t * @protected\n\t\t */\n\t\tthis._selection = new LiveSelection( doc );\n\n\t\tthis._selection.delegate( 'change:range' ).to( this );\n\t\tthis._selection.delegate( 'change:attribute' ).to( this );\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this._selection.isCollapsed;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the most recent part of the selection starts.\n\t * Together with {@link #focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always {@link module:engine/model/range~Range#start start} or\n\t * {@link module:engine/model/range~Range#end end} position of the most recently added range.\n\t *\n\t * Is set to `null` if there are no ranges in selection.\n\t *\n\t * @see #focus\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget anchor() {\n\t\treturn this._selection.anchor;\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * Is set to `null` if there are no ranges in selection.\n\t *\n\t * @see #anchor\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget focus() {\n\t\treturn this._selection.focus;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._selection.rangeCount;\n\t}\n\n\t/**\n\t * Describes whether `Documentselection` has own range(s) set, or if it is defaulted to\n\t * {@link module:engine/model/document~Document#_getDefaultRange document's default range}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget hasOwnRange() {\n\t\treturn this._selection.hasOwnRange;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus}\n\t * precedes {@link #anchor}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn this._selection.isBackward;\n\t}\n\n\t/**\n\t * Describes whether the gravity is overridden (using {@link module:engine/model/writer~Writer#overrideSelectionGravity}) or not.\n\t *\n\t * Note that the gravity remains overridden as long as will not be restored the same number of times as it was overridden.\n\t *\n\t * @readonly\n\t * @returns {Boolean}\n\t */\n\tget isGravityOverridden() {\n\t\treturn this._selection.isGravityOverridden;\n\t}\n\n\t/**\n\t * A collection of selection markers.\n\t * Marker is a selection marker when selection range is inside the marker range.\n\t *\n\t * @readonly\n\t * @type {module:utils/collection~Collection.<module:engine/model/markercollection~Marker>}\n\t */\n\tget markers() {\n\t\treturn this._selection.markers;\n\t}\n\n\t/**\n\t * Used for the compatibility with the {@link module:engine/model/selection~Selection#isEqual} method.\n\t *\n\t * @protected\n\t */\n\tget _ranges() {\n\t\treturn this._selection._ranges;\n\t}\n\n\t/**\n\t * Returns an iterable that iterates over copies of selection ranges.\n\t *\n\t * @returns {Iterable.<module:engine/model/range~Range>}\n\t */\n\tgetRanges() {\n\t\treturn this._selection.getRanges();\n\t}\n\n\t/**\n\t * Returns the first position in the selection.\n\t * First position is the position that {@link module:engine/model/position~Position#isBefore is before}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\treturn this._selection.getFirstPosition();\n\t}\n\n\t/**\n\t * Returns the last position in the selection.\n\t * Last position is the position that {@link module:engine/model/position~Position#isAfter is after}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\treturn this._selection.getLastPosition();\n\t}\n\n\t/**\n\t * Returns a copy of the first range in the selection.\n\t * First range is the one which {@link module:engine/model/range~Range#start start} position\n\t * {@link module:engine/model/position~Position#isBefore is before} start position of all other ranges\n\t * (not to confuse with the first range added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\treturn this._selection.getFirstRange();\n\t}\n\n\t/**\n\t * Returns a copy of the last range in the selection.\n\t * Last range is the one which {@link module:engine/model/range~Range#end end} position\n\t * {@link module:engine/model/position~Position#isAfter is after} end position of all other ranges (not to confuse with the range most\n\t * recently added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\treturn this._selection.getLastRange();\n\t}\n\n\t/**\n\t * Gets elements of type {@link module:engine/model/schema~Schema#isBlock \"block\"} touched by the selection.\n\t *\n\t * This method's result can be used for example to apply block styling to all blocks covered by this selection.\n\t *\n\t * **Note:** `getSelectedBlocks()` returns blocks that are nested in other non-block elements\n\t * but will not return blocks nested in other blocks.\n\t *\n\t * In this case the function will return exactly all 3 paragraphs (note: `<blockQuote>` is not a block itself):\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<blockQuote>\n\t *\t\t\t<paragraph>b</paragraph>\n\t *\t\t</blockQuote>\n\t *\t\t<paragraph>c]d</paragraph>\n\t *\n\t * In this case the paragraph will also be returned, despite the collapsed selection:\n\t *\n\t *\t\t<paragraph>[]a</paragraph>\n\t *\n\t * In such a scenario, however, only blocks A, B & E will be returned as blocks C & D are nested in block B:\n\t *\n\t *\t\t[<blockA></blockA>\n\t *\t\t<blockB>\n\t *\t\t\t<blockC></blockC>\n\t *\t\t\t<blockD></blockD>\n\t *\t\t</blockB>\n\t *\t\t<blockE></blockE>]\n\t *\n\t * If the selection is inside a block all the inner blocks (A & B) are returned:\n\t *\n\t * \t\t<block>\n\t *\t\t\t<blockA>[a</blockA>\n\t * \t\t\t<blockB>b]</blockB>\n\t * \t\t</block>\n\t *\n\t * **Special case**: If a selection ends at the beginning of a block, that block is not returned as from user perspective\n\t * this block wasn't selected. See [#984](https://github.com/ckeditor/ckeditor5-engine/issues/984) for more details.\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<paragraph>b</paragraph>\n\t *\t\t<paragraph>]c</paragraph> // this block will not be returned\n\t *\n\t * @returns {Iterable.<module:engine/model/element~Element>}\n\t */\n\tgetSelectedBlocks() {\n\t\treturn this._selection.getSelectedBlocks();\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/model/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\treturn this._selection.getSelectedElement();\n\t}\n\n\t/**\n\t * Checks whether the selection contains the entire content of the given element. This means that selection must start\n\t * at a position {@link module:engine/model/position~Position#isTouching touching} the element's start and ends at position\n\t * touching the element's end.\n\t *\n\t * By default, this method will check whether the entire content of the selection's current root is selected.\n\t * Useful to check if e.g. the user has just pressed <kbd>Ctrl</kbd> + <kbd>A</kbd>.\n\t *\n\t * @param {module:engine/model/element~Element} [element=this.anchor.root]\n\t * @returns {Boolean}\n\t */\n\tcontainsEntireContent( element ) {\n\t\treturn this._selection.containsEntireContent( element );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by document selection.\n\t */\n\tdestroy() {\n\t\tthis._selection.destroy();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._selection.getAttributeKeys();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._selection.getAttributes();\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on the selection.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._selection.getAttribute( key );\n\t}\n\n\t/**\n\t * Checks if the selection has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on selection, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._selection.hasAttribute( key );\n\t}\n\n\t/**\n\t * Refreshes selection attributes and markers according to the current position in the model.\n\t */\n\trefresh() {\n\t\tthis._selection._updateMarkers();\n\t\tthis._selection._updateAttributes( false );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'documentSelection' ); // -> true\n\t *\t\tselection.is( 'model:selection' ); // -> true\n\t *\t\tselection.is( 'model:documentSelection' ); // -> true\n\t *\n\t *\t\tselection.is( 'view:selection' ); // -> false\n\t *\t\tselection.is( 'element' ); // -> false\n\t *\t\tselection.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' ||\n\t\t\ttype == 'model:selection' ||\n\t\t\ttype == 'documentSelection' ||\n\t\t\ttype == 'model:documentSelection';\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/documentselection~DocumentSelection#focus} to the specified location.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelectionFocus} method.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link module:engine/model/writer~Writer#createPositionAt writer.createPositionAt()} parameters.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelectionFocus\n\t * @protected\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\t_setFocus( itemOrPosition, offset ) {\n\t\tthis._selection.setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable}.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelection} method.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelection\n\t * @protected\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\t_setTo( selectable, placeOrOffset, options ) {\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Sets attribute on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelectionAttribute} method.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelectionAttribute\n\t * @protected\n\t * @param {String} key Key of the attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\t_setAttribute( key, value ) {\n\t\tthis._selection.setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the selection.\n\t * If the given attribute was set on the selection, fires the {@link module:engine/model/selection~Selection#event:change:range}\n\t * event with removed attribute key.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#removeSelectionAttribute} method.\n\t *\n\t * @see module:engine/model/writer~Writer#removeSelectionAttribute\n\t * @protected\n\t * @param {String} key Key of the attribute to remove.\n\t */\n\t_removeAttribute( key ) {\n\t\tthis._selection.removeAttribute( key );\n\t}\n\n\t/**\n\t * Returns an iterable that iterates through all selection attributes stored in current selection's parent.\n\t *\n\t * @protected\n\t * @returns {Iterable.<*>}\n\t */\n\t_getStoredAttributes() {\n\t\treturn this._selection._getStoredAttributes();\n\t}\n\n\t/**\n\t * Temporarily changes the gravity of the selection from the left to the right.\n\t *\n\t * The gravity defines from which direction the selection inherits its attributes. If it's the default left\n\t * gravity, the selection (after being moved by the the user) inherits attributes from its left hand side.\n\t * This method allows to temporarily override this behavior by forcing the gravity to the right.\n\t *\n\t * It returns an unique identifier which is required to restore the gravity. It guarantees the symmetry\n\t * of the process.\n\t *\n\t * @see module:engine/model/writer~Writer#overrideSelectionGravity\n\t * @protected\n\t * @returns {String} The unique id which allows restoring the gravity.\n\t */\n\t_overrideGravity() {\n\t\treturn this._selection.overrideGravity();\n\t}\n\n\t/**\n\t * Restores the {@link ~DocumentSelection#_overrideGravity overridden gravity}.\n\t *\n\t * Restoring the gravity is only possible using the unique identifier returned by\n\t * {@link ~DocumentSelection#_overrideGravity}. Note that the gravity remains overridden as long as won't be restored\n\t * the same number of times it was overridden.\n\t *\n\t * @see module:engine/model/writer~Writer#restoreSelectionGravity\n\t * @protected\n\t * @param {String} uid The unique id returned by {@link #_overrideGravity}.\n\t */\n\t_restoreGravity( uid ) {\n\t\tthis._selection.restoreGravity( uid );\n\t}\n\n\t/**\n\t * Generates and returns an attribute key for selection attributes store, basing on original attribute key.\n\t *\n\t * @protected\n\t * @param {String} key Attribute key to convert.\n\t * @returns {String} Converted attribute key, applicable for selection store.\n\t */\n\tstatic _getStoreAttributeKey( key ) {\n\t\treturn storePrefix + key;\n\t}\n\n\t/**\n\t * Checks whether the given attribute key is an attribute stored on an element.\n\t *\n\t * @protected\n\t * @param {String} key\n\t * @returns {Boolean}\n\t */\n\tstatic _isStoreAttributeKey( key ) {\n\t\treturn key.startsWith( storePrefix );\n\t}\n}\n\nmix( DocumentSelection, EmitterMixin );\n\n/**\n * Fired when selection range(s) changed.\n *\n * @event change:range\n * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its position\n * was directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n * changed because the structure of the model has been changed (which means an indirect change).\n * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n * which mean that they are not updated once the document changes.\n */\n\n/**\n * Fired when selection attribute changed.\n *\n * @event change:attribute\n * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its attributes\n * were directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n * changed in the model and its attributes were refreshed (which means an indirect change).\n * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n * which mean that they are not updated once the document changes.\n * @param {Array.<String>} attributeKeys Array containing keys of attributes that changed.\n */\n\n// `LiveSelection` is used internally by {@link module:engine/model/documentselection~DocumentSelection} and shouldn't be used directly.\n//\n// LiveSelection` is automatically updated upon changes in the {@link module:engine/model/document~Document document}\n// to always contain valid ranges. Its attributes are inherited from the text unless set explicitly.\n//\n// Differences between {@link module:engine/model/selection~Selection} and `LiveSelection` are:\n// * there is always a range in `LiveSelection` - even if no ranges were added there is a \"default range\"\n// present in the selection,\n// * ranges added to this selection updates automatically when the document changes,\n// * attributes of `LiveSelection` are updated automatically according to selection ranges.\n//\n// @extends module:engine/model/selection~Selection\n//\n\nclass LiveSelection extends Selection {\n\t// Creates an empty live selection for given {@link module:engine/model/document~Document}.\n\t// @param {module:engine/model/document~Document} doc Document which owns this selection.\n\tconstructor( doc ) {\n\t\tsuper();\n\n\t\t// List of selection markers.\n\t\t// Marker is a selection marker when selection range is inside the marker range.\n\t\t//\n\t\t// @type {module:utils/collection~Collection}\n\t\tthis.markers = new Collection( { idProperty: 'name' } );\n\n\t\t// Document which owns this selection.\n\t\t//\n\t\t// @protected\n\t\t// @member {module:engine/model/model~Model}\n\t\tthis._model = doc.model;\n\n\t\t// Document which owns this selection.\n\t\t//\n\t\t// @protected\n\t\t// @member {module:engine/model/document~Document}\n\t\tthis._document = doc;\n\n\t\t// Keeps mapping of attribute name to priority with which the attribute got modified (added/changed/removed)\n\t\t// last time. Possible values of priority are: `'low'` and `'normal'`.\n\t\t//\n\t\t// Priorities are used by internal `LiveSelection` mechanisms. All attributes set using `LiveSelection`\n\t\t// attributes API are set with `'normal'` priority.\n\t\t//\n\t\t// @private\n\t\t// @member {Map} module:engine/model/liveselection~LiveSelection#_attributePriority\n\t\tthis._attributePriority = new Map();\n\n\t\t// Contains data required to fix ranges which have been moved to the graveyard.\n\t\t// @private\n\t\t// @member {Array} module:engine/model/liveselection~LiveSelection#_fixGraveyardRangesData\n\t\tthis._fixGraveyardRangesData = [];\n\n\t\t// Flag that informs whether the selection ranges have changed. It is changed on true when `LiveRange#change:range` event is fired.\n\t\t// @private\n\t\t// @member {Array} module:engine/model/liveselection~LiveSelection#_hasChangedRange\n\t\tthis._hasChangedRange = false;\n\n\t\t// Each overriding gravity adds an UID to the set and each removal removes it.\n\t\t// Gravity is overridden when there's at least one UID in the set.\n\t\t// Gravity is restored when the set is empty.\n\t\t// This is to prevent conflicts when gravity is overridden by more than one feature at the same time.\n\t\t// @private\n\t\t// @type {Set}\n\t\tthis._overriddenGravityRegister = new Set();\n\n\t\t// Ensure selection is correct after each operation.\n\t\tthis.listenTo( this._model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation || operation.type == 'marker' || operation.type == 'rename' || operation.type == 'noop' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\twhile ( this._fixGraveyardRangesData.length ) {\n\t\t\t\tconst { liveRange, sourcePosition } = this._fixGraveyardRangesData.shift();\n\n\t\t\t\tthis._fixGraveyardSelection( liveRange, sourcePosition );\n\t\t\t}\n\n\t\t\tif ( this._hasChangedRange ) {\n\t\t\t\tthis._hasChangedRange = false;\n\t\t\t\tthis.fire( 'change:range', { directChange: false } );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Ensure selection is correct and up to date after each range change.\n\t\tthis.on( 'change:range', () => {\n\t\t\tfor ( const range of this.getRanges() ) {\n\t\t\t\tif ( !this._document._validateSelectionRange( range ) ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Range from {@link module:engine/model/documentselection~DocumentSelection document selection}\n\t\t\t\t\t * starts or ends at incorrect position.\n\t\t\t\t\t *\n\t\t\t\t\t * @error document-selection-wrong-position\n\t\t\t\t\t * @param {module:engine/model/range~Range} range\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'document-selection-wrong-position: Range from document selection starts or ends at incorrect position.',\n\t\t\t\t\t\tthis,\n\t\t\t\t\t\t{ range }\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\n\t\t// Update markers data stored by the selection after each marker change.\n\t\tthis.listenTo( this._model.markers, 'update', () => this._updateMarkers() );\n\n\t\t// Ensure selection is up to date after each change block.\n\t\tthis.listenTo( this._document, 'change', ( evt, batch ) => {\n\t\t\tclearAttributesStoredInElement( this._model, batch );\n\t\t} );\n\t}\n\n\tget isCollapsed() {\n\t\tconst length = this._ranges.length;\n\n\t\treturn length === 0 ? this._document._getDefaultRange().isCollapsed : super.isCollapsed;\n\t}\n\n\tget anchor() {\n\t\treturn super.anchor || this._document._getDefaultRange().start;\n\t}\n\n\tget focus() {\n\t\treturn super.focus || this._document._getDefaultRange().end;\n\t}\n\n\tget rangeCount() {\n\t\treturn this._ranges.length ? this._ranges.length : 1;\n\t}\n\n\t// Describes whether `LiveSelection` has own range(s) set, or if it is defaulted to\n\t// {@link module:engine/model/document~Document#_getDefaultRange document's default range}.\n\t//\n\t// @readonly\n\t// @type {Boolean}\n\tget hasOwnRange() {\n\t\treturn this._ranges.length > 0;\n\t}\n\n\t// When set to `true` then selection attributes on node before the caret won't be taken\n\t// into consideration while updating selection attributes.\n\t//\n\t// @protected\n\t// @type {Boolean}\n\tget isGravityOverridden() {\n\t\treturn !!this._overriddenGravityRegister.size;\n\t}\n\n\t// Unbinds all events previously bound by live selection.\n\tdestroy() {\n\t\tfor ( let i = 0; i < this._ranges.length; i++ ) {\n\t\t\tthis._ranges[ i ].detach();\n\t\t}\n\n\t\tthis.stopListening();\n\t}\n\n\t* getRanges() {\n\t\tif ( this._ranges.length ) {\n\t\t\tyield* super.getRanges();\n\t\t} else {\n\t\t\tyield this._document._getDefaultRange();\n\t\t}\n\t}\n\n\tgetFirstRange() {\n\t\treturn super.getFirstRange() || this._document._getDefaultRange();\n\t}\n\n\tgetLastRange() {\n\t\treturn super.getLastRange() || this._document._getDefaultRange();\n\t}\n\n\tsetTo( selectable, optionsOrPlaceOrOffset, options ) {\n\t\tsuper.setTo( selectable, optionsOrPlaceOrOffset, options );\n\t\tthis._updateAttributes( true );\n\t}\n\n\tsetFocus( itemOrPosition, offset ) {\n\t\tsuper.setFocus( itemOrPosition, offset );\n\t\tthis._updateAttributes( true );\n\t}\n\n\tsetAttribute( key, value ) {\n\t\tif ( this._setAttribute( key, value ) ) {\n\t\t\t// Fire event with exact data.\n\t\t\tconst attributeKeys = [ key ];\n\t\t\tthis.fire( 'change:attribute', { attributeKeys, directChange: true } );\n\t\t}\n\t}\n\n\tremoveAttribute( key ) {\n\t\tif ( this._removeAttribute( key ) ) {\n\t\t\t// Fire event with exact data.\n\t\t\tconst attributeKeys = [ key ];\n\t\t\tthis.fire( 'change:attribute', { attributeKeys, directChange: true } );\n\t\t}\n\t}\n\n\toverrideGravity() {\n\t\tconst overrideUid = uid();\n\n\t\t// Remember that another overriding has been requested. It will need to be removed\n\t\t// before the gravity is to be restored.\n\t\tthis._overriddenGravityRegister.add( overrideUid );\n\n\t\tif ( this._overriddenGravityRegister.size === 1 ) {\n\t\t\tthis._updateAttributes( true );\n\t\t}\n\n\t\treturn overrideUid;\n\t}\n\n\trestoreGravity( uid ) {\n\t\tif ( !this._overriddenGravityRegister.has( uid ) ) {\n\t\t\t/**\n\t\t\t * Restoring gravity for an unknown UID is not possible. Make sure you are using a correct\n\t\t\t * UID obtained from the {@link module:engine/model/writer~Writer#overrideSelectionGravity} to restore.\n\t\t\t *\n\t\t\t * @error document-selection-gravity-wrong-restore\n\t\t\t * @param {String} uid The unique identifier returned by\n\t\t\t * {@link module:engine/model/documentselection~DocumentSelection#_overrideGravity}.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'document-selection-gravity-wrong-restore: Attempting to restore the selection gravity for an unknown UID.',\n\t\t\t\tthis,\n\t\t\t\t{ uid }\n\t\t\t);\n\t\t}\n\n\t\tthis._overriddenGravityRegister.delete( uid );\n\n\t\t// Restore gravity only when all overriding have been restored.\n\t\tif ( !this.isGravityOverridden ) {\n\t\t\tthis._updateAttributes( true );\n\t\t}\n\t}\n\n\t_popRange() {\n\t\tthis._ranges.pop().detach();\n\t}\n\n\t_pushRange( range ) {\n\t\tconst liveRange = this._prepareRange( range );\n\n\t\t// `undefined` is returned when given `range` is in graveyard root.\n\t\tif ( liveRange ) {\n\t\t\tthis._ranges.push( liveRange );\n\t\t}\n\t}\n\n\t// Prepares given range to be added to selection. Checks if it is correct,\n\t// converts it to {@link module:engine/model/liverange~LiveRange LiveRange}\n\t// and sets listeners listening to the range's change event.\n\t//\n\t// @private\n\t// @param {module:engine/model/range~Range} range\n\t_prepareRange( range ) {\n\t\tthis._checkRange( range );\n\n\t\tif ( range.root == this._document.graveyard ) {\n\t\t\t// @if CK_DEBUG // console.warn( 'Trying to add a Range that is in the graveyard root. Range rejected.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst liveRange = LiveRange.fromRange( range );\n\n\t\tliveRange.on( 'change:range', ( evt, oldRange, data ) => {\n\t\t\tthis._hasChangedRange = true;\n\n\t\t\t// If `LiveRange` is in whole moved to the graveyard, save necessary data. It will be fixed on `Model#applyOperation` event.\n\t\t\tif ( liveRange.root == this._document.graveyard ) {\n\t\t\t\tthis._fixGraveyardRangesData.push( {\n\t\t\t\t\tliveRange,\n\t\t\t\t\tsourcePosition: data.deletionPosition\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\n\t\treturn liveRange;\n\t}\n\n\t_updateMarkers() {\n\t\tconst markers = [];\n\n\t\tfor ( const marker of this._model.markers ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tfor ( const selectionRange of this.getRanges() ) {\n\t\t\t\tif ( markerRange.containsRange( selectionRange, !selectionRange.isCollapsed ) ) {\n\t\t\t\t\tmarkers.push( marker );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tfor ( const marker of markers ) {\n\t\t\tif ( !this.markers.has( marker ) ) {\n\t\t\t\tthis.markers.add( marker );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const marker of Array.from( this.markers ) ) {\n\t\t\tif ( !markers.includes( marker ) ) {\n\t\t\t\tthis.markers.remove( marker );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Updates this selection attributes according to its ranges and the {@link module:engine/model/document~Document model document}.\n\t//\n\t// @protected\n\t// @param {Boolean} clearAll\n\t// @fires change:attribute\n\t_updateAttributes( clearAll ) {\n\t\tconst newAttributes = toMap( this._getSurroundingAttributes() );\n\t\tconst oldAttributes = toMap( this.getAttributes() );\n\n\t\tif ( clearAll ) {\n\t\t\t// If `clearAll` remove all attributes and reset priorities.\n\t\t\tthis._attributePriority = new Map();\n\t\t\tthis._attrs = new Map();\n\t\t} else {\n\t\t\t// If not, remove only attributes added with `low` priority.\n\t\t\tfor ( const [ key, priority ] of this._attributePriority ) {\n\t\t\t\tif ( priority == 'low' ) {\n\t\t\t\t\tthis._attrs.delete( key );\n\t\t\t\t\tthis._attributePriority.delete( key );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tthis._setAttributesTo( newAttributes );\n\n\t\t// Let's evaluate which attributes really changed.\n\t\tconst changed = [];\n\n\t\t// First, loop through all attributes that are set on selection right now.\n\t\t// Check which of them are different than old attributes.\n\t\tfor ( const [ newKey, newValue ] of this.getAttributes() ) {\n\t\t\tif ( !oldAttributes.has( newKey ) || oldAttributes.get( newKey ) !== newValue ) {\n\t\t\t\tchanged.push( newKey );\n\t\t\t}\n\t\t}\n\n\t\t// Then, check which of old attributes got removed.\n\t\tfor ( const [ oldKey ] of oldAttributes ) {\n\t\t\tif ( !this.hasAttribute( oldKey ) ) {\n\t\t\t\tchanged.push( oldKey );\n\t\t\t}\n\t\t}\n\n\t\t// Fire event with exact data (fire only if anything changed).\n\t\tif ( changed.length > 0 ) {\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: changed, directChange: false } );\n\t\t}\n\t}\n\n\t// Internal method for setting `LiveSelection` attribute. Supports attribute priorities (through `directChange`\n\t// parameter).\n\t//\n\t// @private\n\t// @param {String} key Attribute key.\n\t// @param {*} value Attribute value.\n\t// @param {Boolean} [directChange=true] `true` if the change is caused by `Selection` API, `false` if change\n\t// is caused by `Batch` API.\n\t// @returns {Boolean} Whether value has changed.\n\t_setAttribute( key, value, directChange = true ) {\n\t\tconst priority = directChange ? 'normal' : 'low';\n\n\t\tif ( priority == 'low' && this._attributePriority.get( key ) == 'normal' ) {\n\t\t\t// Priority too low.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst oldValue = super.getAttribute( key );\n\n\t\t// Don't do anything if value has not changed.\n\t\tif ( oldValue === value ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tthis._attrs.set( key, value );\n\n\t\t// Update priorities map.\n\t\tthis._attributePriority.set( key, priority );\n\n\t\treturn true;\n\t}\n\n\t// Internal method for removing `LiveSelection` attribute. Supports attribute priorities (through `directChange`\n\t// parameter).\n\t//\n\t// NOTE: Even if attribute is not present in the selection but is provided to this method, it's priority will\n\t// be changed according to `directChange` parameter.\n\t//\n\t// @private\n\t// @param {String} key Attribute key.\n\t// @param {Boolean} [directChange=true] `true` if the change is caused by `Selection` API, `false` if change\n\t// is caused by `Batch` API.\n\t// @returns {Boolean} Whether attribute was removed. May not be true if such attributes didn't exist or the\n\t// existing attribute had higher priority.\n\t_removeAttribute( key, directChange = true ) {\n\t\tconst priority = directChange ? 'normal' : 'low';\n\n\t\tif ( priority == 'low' && this._attributePriority.get( key ) == 'normal' ) {\n\t\t\t// Priority too low.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Update priorities map.\n\t\tthis._attributePriority.set( key, priority );\n\n\t\t// Don't do anything if value has not changed.\n\t\tif ( !super.hasAttribute( key ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tthis._attrs.delete( key );\n\n\t\treturn true;\n\t}\n\n\t// Internal method for setting multiple `LiveSelection` attributes. Supports attribute priorities (through\n\t// `directChange` parameter).\n\t//\n\t// @private\n\t// @param {Map.<String,*>} attrs Iterable object containing attributes to be set.\n\t// @returns {Set.<String>} Changed attribute keys.\n\t_setAttributesTo( attrs ) {\n\t\tconst changed = new Set();\n\n\t\tfor ( const [ oldKey, oldValue ] of this.getAttributes() ) {\n\t\t\t// Do not remove attribute if attribute with same key and value is about to be set.\n\t\t\tif ( attrs.get( oldKey ) === oldValue ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// All rest attributes will be removed so changed attributes won't change .\n\t\t\tthis._removeAttribute( oldKey, false );\n\t\t}\n\n\t\tfor ( const [ key, value ] of attrs ) {\n\t\t\t// Attribute may not be set because of attributes or because same key/value is already added.\n\t\t\tconst gotAdded = this._setAttribute( key, value, false );\n\n\t\t\tif ( gotAdded ) {\n\t\t\t\tchanged.add( key );\n\t\t\t}\n\t\t}\n\n\t\treturn changed;\n\t}\n\n\t// Returns an iterable that iterates through all selection attributes stored in current selection's parent.\n\t//\n\t// @protected\n\t// @returns {Iterable.<*>}\n\t* _getStoredAttributes() {\n\t\tconst selectionParent = this.getFirstPosition().parent;\n\n\t\tif ( this.isCollapsed && selectionParent.isEmpty ) {\n\t\t\tfor ( const key of selectionParent.getAttributeKeys() ) {\n\t\t\t\tif ( key.startsWith( storePrefix ) ) {\n\t\t\t\t\tconst realKey = key.substr( storePrefix.length );\n\n\t\t\t\t\tyield [ realKey, selectionParent.getAttribute( key ) ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Checks model text nodes that are closest to the selection's first position and returns attributes of first\n\t// found element. If there are no text nodes in selection's first position parent, it returns selection\n\t// attributes stored in that parent.\n\t//\n\t// @private\n\t// @returns {Iterable.<*>} Collection of attributes.\n\t_getSurroundingAttributes() {\n\t\tconst position = this.getFirstPosition();\n\t\tconst schema = this._model.schema;\n\n\t\tlet attrs = null;\n\n\t\tif ( !this.isCollapsed ) {\n\t\t\t// 1. If selection is a range...\n\t\t\tconst range = this.getFirstRange();\n\n\t\t\t// ...look for a first character node in that range and take attributes from it.\n\t\t\tfor ( const value of range ) {\n\t\t\t\t// If the item is an object, we don't want to get attributes from its children.\n\t\t\t\tif ( value.item.is( 'element' ) && schema.isObject( value.item ) ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tif ( value.type == 'text' ) {\n\t\t\t\t\tattrs = value.item.getAttributes();\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\t// 2. If the selection is a caret or the range does not contain a character node...\n\n\t\t\tconst nodeBefore = position.textNode ? position.textNode : position.nodeBefore;\n\t\t\tconst nodeAfter = position.textNode ? position.textNode : position.nodeAfter;\n\n\t\t\t// When gravity is overridden then don't take node before into consideration.\n\t\t\tif ( !this.isGravityOverridden ) {\n\t\t\t\t// ...look at the node before caret and take attributes from it if it is a character node.\n\t\t\t\tattrs = getAttrsIfCharacter( nodeBefore );\n\t\t\t}\n\n\t\t\t// 3. If not, look at the node after caret...\n\t\t\tif ( !attrs ) {\n\t\t\t\tattrs = getAttrsIfCharacter( nodeAfter );\n\t\t\t}\n\n\t\t\t// 4. If not, try to find the first character on the left, that is in the same node.\n\t\t\t// When gravity is overridden then don't take node before into consideration.\n\t\t\tif ( !this.isGravityOverridden && !attrs ) {\n\t\t\t\tlet node = nodeBefore;\n\n\t\t\t\twhile ( node && !attrs ) {\n\t\t\t\t\tnode = node.previousSibling;\n\t\t\t\t\tattrs = getAttrsIfCharacter( node );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// 5. If not found, try to find the first character on the right, that is in the same node.\n\t\t\tif ( !attrs ) {\n\t\t\t\tlet node = nodeAfter;\n\n\t\t\t\twhile ( node && !attrs ) {\n\t\t\t\t\tnode = node.nextSibling;\n\t\t\t\t\tattrs = getAttrsIfCharacter( node );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// 6. If not found, selection should retrieve attributes from parent.\n\t\t\tif ( !attrs ) {\n\t\t\t\tattrs = this._getStoredAttributes();\n\t\t\t}\n\t\t}\n\n\t\treturn attrs;\n\t}\n\n\t// Fixes a selection range after it ends up in graveyard root.\n\t//\n\t// @private\n\t// @param {module:engine/model/liverange~LiveRange} liveRange The range from selection, that ended up in the graveyard root.\n\t// @param {module:engine/model/position~Position} removedRangeStart Start position of a range which was removed.\n\t_fixGraveyardSelection( liveRange, removedRangeStart ) {\n\t\t// The start of the removed range is the closest position to the `liveRange` - the original selection range.\n\t\t// This is a good candidate for a fixed selection range.\n\t\tconst positionCandidate = removedRangeStart.clone();\n\n\t\t// Find a range that is a correct selection range and is closest to the start of removed range.\n\t\tconst selectionRange = this._model.schema.getNearestSelectionRange( positionCandidate );\n\n\t\t// Remove the old selection range before preparing and adding new selection range. This order is important,\n\t\t// because new range, in some cases, may intersect with old range (it depends on `getNearestSelectionRange()` result).\n\t\tconst index = this._ranges.indexOf( liveRange );\n\t\tthis._ranges.splice( index, 1 );\n\t\tliveRange.detach();\n\n\t\t// If nearest valid selection range has been found - add it in the place of old range.\n\t\tif ( selectionRange ) {\n\t\t\t// Check the range, convert it to live range, bind events, etc.\n\t\t\tconst newRange = this._prepareRange( selectionRange );\n\n\t\t\t// Add new range in the place of old range.\n\t\t\tthis._ranges.splice( index, 0, newRange );\n\t\t}\n\t\t// If nearest valid selection range cannot be found - just removing the old range is fine.\n\t}\n}\n\n// Helper function for {@link module:engine/model/liveselection~LiveSelection#_updateAttributes}.\n//\n// It takes model item, checks whether it is a text node (or text proxy) and, if so, returns it's attributes. If not, returns `null`.\n//\n// @param {module:engine/model/item~Item|null} node\n// @returns {Boolean}\nfunction getAttrsIfCharacter( node ) {\n\tif ( node instanceof TextProxy || node instanceof Text ) {\n\t\treturn node.getAttributes();\n\t}\n\n\treturn null;\n}\n\n// Removes selection attributes from element which is not empty anymore.\n//\n// @private\n// @param {module:engine/model/model~Model} model\n// @param {module:engine/model/batch~Batch} batch\nfunction clearAttributesStoredInElement( model, batch ) {\n\tconst differ = model.document.differ;\n\n\tfor ( const entry of differ.getChanges() ) {\n\t\tif ( entry.type != 'insert' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst changeParent = entry.position.parent;\n\t\tconst isNoLongerEmpty = entry.length === changeParent.maxOffset;\n\n\t\tif ( isNoLongerEmpty ) {\n\t\t\tmodel.enqueueChange( batch, writer => {\n\t\t\t\tconst storedAttributes = Array.from( changeParent.getAttributeKeys() )\n\t\t\t\t\t.filter( key => key.startsWith( storePrefix ) );\n\n\t\t\t\tfor ( const key of storedAttributes ) {\n\t\t\t\t\twriter.removeAttribute( key, changeParent );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/conversionhelpers\n */\n\n/**\n * Base class for conversion helpers.\n */\nexport default class ConversionHelpers {\n\t/**\n\t * Creates a conversion helpers instance.\n\t *\n\t * @param {Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher>} dispatchers\n\t */\n\tconstructor( dispatchers ) {\n\t\tthis._dispatchers = dispatchers;\n\t}\n\n\t/**\n\t * Registers a conversion helper.\n\t *\n\t * **Note**: See full usage example in the `{@link module:engine/conversion/conversion~Conversion#for conversion.for()}`\n\t * method description.\n\t *\n\t * @param {Function} conversionHelper The function to be called on event.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers|module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tadd( conversionHelper ) {\n\t\tfor ( const dispatcher of this._dispatchers ) {\n\t\t\tconversionHelper( dispatcher );\n\t\t}\n\n\t\treturn this;\n\t}\n}\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * This method is like `_.clone` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @returns {*} Returns the deep cloned value.\n * @see _.clone\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var deep = _.cloneDeep(objects);\n * console.log(deep[0] === objects[0]);\n * // => false\n */\nfunction cloneDeep(value) {\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n}\n\nexport default cloneDeep;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Contains downcast (model-to-view) converters for {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}.\n *\n * @module engine/conversion/downcasthelpers\n */\n\nimport ModelRange from '../model/range';\nimport ModelSelection from '../model/selection';\nimport ModelElement from '../model/element';\n\nimport ViewAttributeElement from '../view/attributeelement';\nimport DocumentSelection from '../model/documentselection';\nimport ConversionHelpers from './conversionhelpers';\n\nimport { cloneDeep } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Downcast conversion helper functions.\n *\n * @extends module:engine/conversion/conversionhelpers~ConversionHelpers\n */\nexport default class DowncastHelpers extends ConversionHelpers {\n\t/**\n\t * Model element to view element conversion helper.\n\t *\n\t * This conversion results in creating a view element. For example, model `<paragraph>Foo</paragraph>` becomes `<p>Foo</p>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'p'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'div',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'fancyParagraph',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'heading',\n\t *\t\t\tview: ( modelElement, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createContainerElement( 'h' + modelElement.getAttribute( 'level' ) )\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model element to convert.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n\t * that takes the model element and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n\t * as parameters and returns a view container element.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\telementToElement( config ) {\n\t\treturn this.add( downcastElementToElement( config ) );\n\t}\n\n\t/**\n\t * Model attribute to view element conversion helper.\n\t *\n\t * This conversion results in wrapping view nodes with a view attribute element. For example, a model text node with\n\t * `\"Foo\"` as data and the `bold` attribute becomes `<strong>Foo</strong>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'strong'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'b',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'invert',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: [ 'font-light', 'bg-dark' ]\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalues: [ 'big', 'small' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tbig: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '1.2em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '0.8em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: ( modelAttributeValue, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createAttributeElement( 'span', {\n\t *\t\t\t\t\tstyle: 'font-weight:' + modelAttributeValue\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'color',\n\t *\t\t\t\tname: '$text'\n\t *\t\t\t},\n\t *\t\t\tview: ( modelAttributeValue, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createAttributeElement( 'span', {\n\t *\t\t\t\t\tstyle: 'color:' + modelAttributeValue\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values }` object. `values` is an array\n\t * of `String`s with possible values if the model attribute is an enumerable.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function|Object} config.view A view element definition or a function\n\t * that takes the model attribute value and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n\t * as parameters and returns a view attribute element. If `config.model.values` is\n\t * given, `config.view` should be an object assigning values from `config.model.values` to view element definitions or functions.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tattributeToElement( config ) {\n\t\treturn this.add( downcastAttributeToElement( config ) );\n\t}\n\n\t/**\n\t * Model attribute to view attribute conversion helper.\n\t *\n\t * This conversion results in adding an attribute to a view node, basing on an attribute from a model node. For example,\n\t * `<image src='foo.jpg'></image>` is converted to `<img src='foo.jpg'></img>`.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tview: 'src'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tview: 'href',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'source'\n\t *\t\t\t},\n\t *\t\t\tview: 'src'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'styled',\n\t *\t\t\t\tvalues: [ 'dark', 'light' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tdark: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'styled', 'styled-dark' ]\n\t *\t\t\t\t},\n\t *\t\t\t\tlight: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'styled', 'styled-light' ]\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'styled',\n\t *\t\t\tview: modelAttributeValue => ( { key: 'class', value: 'styled-' + modelAttributeValue } )\n\t *\t\t} );\n\t *\n\t * *Note:* Downcasting to a style property requires providing `value` as an object:\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'lineHeight',\n\t *\t\t\tview: modelAttributeValue => ( {\n\t *\t\t\t\tkey: 'style',\n\t *\t\t\t\tvalue: {\n\t *\t\t\t\t\t'line-height': modelAttributeValue,\n\t *\t\t\t\t\t'border-bottom': '1px dotted #ba2'\n\t *\t\t\t\t}\n\t *\t\t\t} )\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values, [ name ] }` object describing\n\t * the attribute key, possible values and, optionally, an element name to convert from.\n\t * @param {String|Object|Function} config.view A view attribute key, or a `{ key, value }` object or a function that takes\n\t * the model attribute value and returns a `{ key, value }` object. If `key` is `'class'`, `value` can be a `String` or an\n\t * array of `String`s. If `key` is `'style'`, `value` is an object with key-value pairs. In other cases, `value` is a `String`.\n\t * If `config.model.values` is set, `config.view` should be an object assigning values from `config.model.values` to\n\t * `{ key, value }` objects or a functions.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tattributeToAttribute( config ) {\n\t\treturn this.add( downcastAttributeToAttribute( config ) );\n\t}\n\n\t/**\n\t * Model marker to view element conversion helper.\n\t *\n\t * This conversion results in creating a view element on the boundaries of the converted marker. If the converted marker\n\t * is collapsed, only one element is created. For example, model marker set like this: `<paragraph>F[oo b]ar</paragraph>`\n\t * becomes `<p>F<span data-marker=\"search\"></span>oo b<span data-marker=\"search\"></span>ar</p>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: 'marker-search'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: 'search-result',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tattributes: {\n\t *\t\t\t\t\t'data-marker': 'search'\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: ( markerData, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createUIElement( 'span', {\n\t *\t\t\t\t\t'data-marker': 'search',\n\t *\t\t\t\t\t'data-start': markerData.isOpening\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * If a function is passed as the `config.view` parameter, it will be used to generate both boundary elements. The function\n\t * receives the `data` object as a parameter and should return an instance of the\n\t * {@link module:engine/view/uielement~UIElement view UI element}. The `data` object and\n\t * {@link module:engine/conversion/downcastdispatcher~DowncastConversionApi `conversionApi`} are passed from\n\t * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}. Additionally,\n\t * the `data.isOpening` parameter is passed, which is set to `true` for the marker start boundary element, and `false` to\n\t * the marker end boundary element.\n\t *\n\t * This kind of conversion is useful for saving data into the database, so it should be used in the data conversion pipeline.\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #markerToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model marker (or model marker group) to convert.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n\t * that takes the model marker data as a parameter and returns a view UI element.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tmarkerToElement( config ) {\n\t\treturn this.add( downcastMarkerToElement( config ) );\n\t}\n\n\t/**\n\t * Model marker to highlight conversion helper.\n\t *\n\t * This conversion results in creating a highlight on view nodes. For this kind of conversion,\n\t * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor} should be provided.\n\t *\n\t * For text nodes, a `<span>` {@link module:engine/view/attributeelement~AttributeElement} is created and it wraps all text nodes\n\t * in the converted marker range. For example, a model marker set like this: `<paragraph>F[oo b]ar</paragraph>` becomes\n\t * `<p>F<span class=\"comment\">oo b</span>ar</p>` in the view.\n\t *\n\t * {@link module:engine/view/containerelement~ContainerElement} may provide a custom way of handling highlight. Most often,\n\t * the element itself is given classes and attributes described in the highlight descriptor (instead of being wrapped in `<span>`).\n\t * For example, a model marker set like this: `[<image src=\"foo.jpg\"></image>]` becomes `<img src=\"foo.jpg\" class=\"comment\"></img>`\n\t * in the view.\n\t *\n\t * For container elements, the conversion is two-step. While the converter processes the highlight descriptor and passes it\n\t * to a container element, it is the container element instance itself that applies values from the highlight descriptor.\n\t * So, in a sense, the converter takes care of stating what should be applied on what, while the element decides how to apply that.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( { model: 'comment', view: { classes: 'comment' } } );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( {\n\t *\t\t\tmodel: 'comment',\n\t *\t\t\tview: { classes: 'new-comment' },\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( {\n\t *\t\t\tmodel: 'comment',\n\t *\t\t\tview: data => {\n\t *\t\t\t\t// Assuming that the marker name is in a form of comment:commentType.\n\t *\t\t\t\tconst commentType = data.markerName.split( ':' )[ 1 ];\n\t *\n\t *\t\t\t\treturn {\n\t *\t\t\t\t\tclasses: [ 'comment', 'comment-' + commentType ]\n\t *\t\t\t\t};\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * If a function is passed as the `config.view` parameter, it will be used to generate the highlight descriptor. The function\n\t * receives the `data` object as a parameter and should return a\n\t * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor highlight descriptor}.\n\t * The `data` object properties are passed from {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}.\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #markerToHighlight\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model marker (or model marker group) to convert.\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} config.view A highlight descriptor\n\t * that will be used for highlighting or a function that takes the model marker data as a parameter and returns a highlight descriptor.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tmarkerToHighlight( config ) {\n\t\treturn this.add( downcastMarkerToHighlight( config ) );\n\t}\n}\n\n/**\n * Function factory that creates a default downcast converter for text insertion changes.\n *\n * The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n *\n *\t\tmodelDispatcher.on( 'insert:$text', insertText() );\n *\n * @returns {Function} Insert text event converter.\n */\nexport function insertText() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\t\tconst viewText = viewWriter.createText( data.item.data );\n\n\t\tviewWriter.insert( viewPosition, viewText );\n\t};\n}\n\n/**\n * Function factory that creates a default downcast converter for node remove changes.\n *\n *\t\tmodelDispatcher.on( 'remove', remove() );\n *\n * @returns {Function} Remove event converter.\n */\nexport function remove() {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Find view range start position by mapping model position at which the remove happened.\n\t\tconst viewStart = conversionApi.mapper.toViewPosition( data.position );\n\n\t\tconst modelEnd = data.position.getShiftedBy( data.length );\n\t\tconst viewEnd = conversionApi.mapper.toViewPosition( modelEnd, { isPhantom: true } );\n\n\t\tconst viewRange = conversionApi.writer.createRange( viewStart, viewEnd );\n\n\t\t// Trim the range to remove in case some UI elements are on the view range boundaries.\n\t\tconst removed = conversionApi.writer.remove( viewRange.getTrimmed() );\n\n\t\t// After the range is removed, unbind all view elements from the model.\n\t\t// Range inside view document fragment is used to unbind deeply.\n\t\tfor ( const child of conversionApi.writer.createRangeIn( removed ).getItems() ) {\n\t\t\tconversionApi.mapper.unbindViewElement( child );\n\t\t}\n\t};\n}\n\n/**\n * Creates a `<span>` {@link module:engine/view/attributeelement~AttributeElement view attribute element} from the information\n * provided by the {@link module:engine/conversion/downcasthelpers~HighlightDescriptor highlight descriptor} object. If a priority\n * is not provided in the descriptor, the default priority will be used.\n *\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n * @returns {module:engine/view/attributeelement~AttributeElement}\n */\nexport function createViewElementFromHighlightDescriptor( descriptor ) {\n\tconst viewElement = new ViewAttributeElement( 'span', descriptor.attributes );\n\n\tif ( descriptor.classes ) {\n\t\tviewElement._addClass( descriptor.classes );\n\t}\n\n\tif ( descriptor.priority ) {\n\t\tviewElement._priority = descriptor.priority;\n\t}\n\n\tviewElement._id = descriptor.id;\n\n\treturn viewElement;\n}\n\n/**\n * Function factory that creates a converter which converts a non-collapsed {@link module:engine/model/selection~Selection model selection}\n * to a {@link module:engine/view/documentselection~DocumentSelection view selection}. The converter consumes appropriate\n * value from the `consumable` object and maps model positions from the selection to view positions.\n *\n *\t\tmodelDispatcher.on( 'selection', convertRangeSelection() );\n *\n * @returns {Function} Selection converter.\n */\nexport function convertRangeSelection() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst selection = data.selection;\n\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( selection, 'selection' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( const range of selection.getRanges() ) {\n\t\t\tconst viewRange = conversionApi.mapper.toViewRange( range );\n\t\t\tviewRanges.push( viewRange );\n\t\t}\n\n\t\tconversionApi.writer.setSelection( viewRanges, { backward: selection.isBackward } );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts a collapsed {@link module:engine/model/selection~Selection model selection} to\n * a {@link module:engine/view/documentselection~DocumentSelection view selection}. The converter consumes appropriate\n * value from the `consumable` object, maps the model selection position to the view position and breaks\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} at the selection position.\n *\n *\t\tmodelDispatcher.on( 'selection', convertCollapsedSelection() );\n *\n * An example of the view state before and after converting the collapsed selection:\n *\n *\t\t <p><strong>f^oo<strong>bar</p>\n *\t\t-> <p><strong>f</strong>^<strong>oo</strong>bar</p>\n *\n * By breaking attribute elements like `<strong>`, the selection is in a correct element. Then, when the selection attribute is\n * converted, broken attributes might be merged again, or the position where the selection is may be wrapped\n * with different, appropriate attribute elements.\n *\n * See also {@link module:engine/conversion/downcasthelpers~clearAttributes} which does a clean-up\n * by merging attributes.\n *\n * @returns {Function} Selection converter.\n */\nexport function convertCollapsedSelection() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst selection = data.selection;\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( selection, 'selection' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst modelPosition = selection.getFirstPosition();\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( modelPosition );\n\t\tconst brokenPosition = viewWriter.breakAttributes( viewPosition );\n\n\t\tviewWriter.setSelection( brokenPosition );\n\t};\n}\n\n/**\n * Function factory that creates a converter which clears artifacts after the previous\n * {@link module:engine/model/selection~Selection model selection} conversion. It removes all empty\n * {@link module:engine/view/attributeelement~AttributeElement view attribute elements} and merges sibling attributes at all start and end\n * positions of all ranges.\n *\n *\t\t <p><strong>^</strong></p>\n *\t\t-> <p>^</p>\n *\n *\t\t <p><strong>foo</strong>^<strong>bar</strong>bar</p>\n *\t\t-> <p><strong>foo^bar<strong>bar</p>\n *\n *\t\t <p><strong>foo</strong><em>^</em><strong>bar</strong>bar</p>\n *\t\t-> <p><strong>foo^bar<strong>bar</p>\n *\n * This listener should be assigned before any converter for the new selection:\n *\n *\t\tmodelDispatcher.on( 'selection', clearAttributes() );\n *\n * See {@link module:engine/conversion/downcasthelpers~convertCollapsedSelection}\n * which does the opposite by breaking attributes in the selection position.\n *\n * @returns {Function} Selection converter.\n */\nexport function clearAttributes() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tfor ( const range of viewSelection.getRanges() ) {\n\t\t\t// Not collapsed selection should not have artifacts.\n\t\t\tif ( range.isCollapsed ) {\n\t\t\t\t// Position might be in the node removed by the view writer.\n\t\t\t\tif ( range.end.parent.document ) {\n\t\t\t\t\tconversionApi.writer.mergeAttributes( range.start );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tviewWriter.setSelection( null );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts set/change/remove attribute changes from the model to the view.\n * It can also be used to convert selection attributes. In that case, an empty attribute element will be created and the\n * selection will be put inside it.\n *\n * Attributes from the model are converted to a view element that will be wrapping these view nodes that are bound to\n * model elements having the given attribute. This is useful for attributes like `bold` that may be set on text nodes in the model\n * but are represented as an element in the view:\n *\n *\t\t[paragraph] MODEL ====> VIEW <p>\n *\t\t\t|- a {bold: true} |- <b>\n *\t\t\t|- b {bold: true} | |- ab\n *\t\t\t|- c |- c\n *\n * Passed `Function` will be provided with the attribute value and then all the parameters of the\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute `attribute` event}.\n * It is expected that the function returns an {@link module:engine/view/element~Element}.\n * The result of the function will be the wrapping element.\n * When the provided `Function` does not return any element, no conversion will take place.\n *\n * The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n *\n *\t\tmodelDispatcher.on( 'attribute:bold', wrap( ( modelAttributeValue, viewWriter ) => {\n *\t\t\treturn viewWriter.createAttributeElement( 'strong' );\n *\t\t} );\n *\n * @protected\n * @param {Function} elementCreator Function returning a view element that will be used for wrapping.\n * @returns {Function} Set/change attribute converter.\n */\nexport function wrap( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Recreate current wrapping node. It will be used to unwrap view range if the attribute value has changed\n\t\t// or the attribute was removed.\n\t\tconst oldViewElement = elementCreator( data.attributeOldValue, conversionApi.writer );\n\n\t\t// Create node to wrap with.\n\t\tconst newViewElement = elementCreator( data.attributeNewValue, conversionApi.writer );\n\n\t\tif ( !oldViewElement && !newViewElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tif ( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) {\n\t\t\t// Selection attribute conversion.\n\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), newViewElement );\n\t\t} else {\n\t\t\t// Node attribute conversion.\n\t\t\tlet viewRange = conversionApi.mapper.toViewRange( data.range );\n\n\t\t\t// First, unwrap the range from current wrapper.\n\t\t\tif ( data.attributeOldValue !== null && oldViewElement ) {\n\t\t\t\tviewRange = viewWriter.unwrap( viewRange, oldViewElement );\n\t\t\t}\n\n\t\t\tif ( data.attributeNewValue !== null && newViewElement ) {\n\t\t\t\tviewWriter.wrap( viewRange, newViewElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts node insertion changes from the model to the view.\n * The function passed will be provided with all the parameters of the dispatcher's\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert `insert` event}.\n * It is expected that the function returns an {@link module:engine/view/element~Element}.\n * The result of the function will be inserted into the view.\n *\n * The converter automatically consumes the corresponding value from the consumables list, stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}) and binds the model and view elements.\n *\n *\t\tdowncastDispatcher.on(\n *\t\t\t'insert:myElem',\n *\t\t\tinsertElement( ( modelItem, viewWriter ) => {\n *\t\t\t\tconst text = viewWriter.createText( 'myText' );\n *\t\t\t\tconst myElem = viewWriter.createElement( 'myElem', { myAttr: 'my-' + modelItem.getAttribute( 'myAttr' ) }, text );\n *\n *\t\t\t\t// Do something fancy with `myElem` using `modelItem` or other parameters.\n *\n *\t\t\t\treturn myElem;\n *\t\t\t}\n *\t\t) );\n *\n * @protected\n * @param {Function} elementCreator Function returning a view element, which will be inserted.\n * @returns {Function} Insert element event converter.\n */\nexport function insertElement( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewElement = elementCreator( data.item, conversionApi.writer );\n\n\t\tif ( !viewElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconversionApi.mapper.bindElements( data.item, viewElement );\n\t\tconversionApi.writer.insert( viewPosition, viewElement );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts marker adding change to the\n * {@link module:engine/view/uielement~UIElement view UI element}.\n *\n * The view UI element that will be added to the view depends on the passed parameter. See {@link ~insertElement}.\n * In case of a non-collapsed range, the UI element will not wrap nodes but separate elements will be placed at the beginning\n * and at the end of the range.\n *\n * This converter binds created UI elements with the marker name using {@link module:engine/conversion/mapper~Mapper#bindElementToMarker}.\n *\n * @protected\n * @param {module:engine/view/uielement~UIElement|Function} elementCreator A view UI element or a function returning the view element\n * that will be inserted.\n * @returns {Function} Insert element event converter.\n */\nexport function insertUIElement( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Create two view elements. One will be inserted at the beginning of marker, one at the end.\n\t\t// If marker is collapsed, only \"opening\" element will be inserted.\n\t\tdata.isOpening = true;\n\t\tconst viewStartElement = elementCreator( data, conversionApi.writer );\n\n\t\tdata.isOpening = false;\n\t\tconst viewEndElement = elementCreator( data, conversionApi.writer );\n\n\t\tif ( !viewStartElement || !viewEndElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst markerRange = data.markerRange;\n\n\t\t// Marker that is collapsed has consumable build differently that non-collapsed one.\n\t\t// For more information see `addMarker` event description.\n\t\t// If marker's range is collapsed - check if it can be consumed.\n\t\tif ( markerRange.isCollapsed && !conversionApi.consumable.consume( markerRange, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If marker's range is not collapsed - consume all items inside.\n\t\tfor ( const value of markerRange ) {\n\t\t\tif ( !conversionApi.consumable.consume( value.item, evt.name ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tconst mapper = conversionApi.mapper;\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// Add \"opening\" element.\n\t\tviewWriter.insert( mapper.toViewPosition( markerRange.start ), viewStartElement );\n\t\tconversionApi.mapper.bindElementToMarker( viewStartElement, data.markerName );\n\n\t\t// Add \"closing\" element only if range is not collapsed.\n\t\tif ( !markerRange.isCollapsed ) {\n\t\t\tviewWriter.insert( mapper.toViewPosition( markerRange.end ), viewEndElement );\n\t\t\tconversionApi.mapper.bindElementToMarker( viewEndElement, data.markerName );\n\t\t}\n\n\t\tevt.stop();\n\t};\n}\n\n// Function factory that returns a default downcast converter for removing a {@link module:engine/view/uielement~UIElement UI element}\n// basing on marker remove change.\n//\n// This converter unbinds elements from the marker name.\n//\n// @returns {Function} Removed UI element converter.\nfunction removeUIElement() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst elements = conversionApi.mapper.markerNameToElements( data.markerName );\n\n\t\tif ( !elements ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const element of elements ) {\n\t\t\tconversionApi.mapper.unbindElementFromMarkerName( element, data.markerName );\n\t\t\tconversionApi.writer.clear( conversionApi.writer.createRangeOn( element ), element );\n\t\t}\n\n\t\tconversionApi.writer.clearClonedElementsGroup( data.markerName );\n\n\t\tevt.stop();\n\t};\n}\n\n// Function factory that creates a converter which converts set/change/remove attribute changes from the model to the view.\n//\n// Attributes from the model are converted to the view element attributes in the view. You may provide a custom function to generate\n// a key-value attribute pair to add/change/remove. If not provided, model attributes will be converted to view element\n// attributes on a one-to-one basis.\n//\n// *Note:** The provided attribute creator should always return the same `key` for a given attribute from the model.\n//\n// The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n// {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n//\n//\t\tmodelDispatcher.on( 'attribute:customAttr:myElem', changeAttribute( ( value, data ) => {\n//\t\t\t// Change attribute key from `customAttr` to `class` in the view.\n//\t\t\tconst key = 'class';\n//\t\t\tlet value = data.attributeNewValue;\n//\n//\t\t\t// Force attribute value to 'empty' if the model element is empty.\n//\t\t\tif ( data.item.childCount === 0 ) {\n//\t\t\t\tvalue = 'empty';\n//\t\t\t}\n//\n//\t\t\t// Return the key-value pair.\n//\t\t\treturn { key, value };\n//\t\t} ) );\n//\n// @param {Function} [attributeCreator] Function returning an object with two properties: `key` and `value`, which\n// represent the attribute key and attribute value to be set on a {@link module:engine/view/element~Element view element}.\n// The function is passed the model attribute value as the first parameter and additional data about the change as the second parameter.\n// @returns {Function} Set/change attribute converter.\nfunction changeAttribute( attributeCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst oldAttribute = attributeCreator( data.attributeOldValue, data );\n\t\tconst newAttribute = attributeCreator( data.attributeNewValue, data );\n\n\t\tif ( !oldAttribute && !newAttribute ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// If model item cannot be mapped to a view element, it means item is not an `Element` instance but a `TextProxy` node.\n\t\t// Only elements can have attributes in a view so do not proceed for anything else (#1587).\n\t\tif ( !viewElement ) {\n\t\t\t/**\n\t\t\t * This error occurs when a {@link module:engine/model/textproxy~TextProxy text node's} attribute is to be downcasted\n\t\t\t * by {@link module:engine/conversion/conversion~Conversion#attributeToAttribute `Attribute to Attribute converter`}.\n\t\t\t * In most cases it is caused by converters misconfiguration when only \"generic\" converter is defined:\n\t\t\t *\n\t\t\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t\t\t *\t\t\tmodel: 'attribute-name',\n\t\t\t *\t\t\tview: 'attribute-name'\n\t\t\t *\t\t} ) );\n\t\t\t *\n\t\t\t * and given attribute is used on text node, for example:\n\t\t\t *\n\t\t\t *\t\tmodel.change( writer => {\n\t\t\t *\t\t\twriter.insertText( 'Foo', { 'attribute-name': 'bar' }, parent, 0 );\n\t\t\t *\t\t} );\n\t\t\t *\n\t\t\t * In such cases, to convert the same attribute for both {@link module:engine/model/element~Element}\n\t\t\t * and {@link module:engine/model/textproxy~TextProxy `Text`} nodes, text specific\n\t\t\t * {@link module:engine/conversion/conversion~Conversion#attributeToElement `Attribute to Element converter`}\n\t\t\t * with higher {@link module:utils/priorities~PriorityString priority} must also be defined:\n\t\t\t *\n\t\t\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t\t\t *\t\t\tmodel: {\n\t\t\t *\t\t\t\tkey: 'attribute-name',\n\t\t\t *\t\t\t\tname: '$text'\n\t\t\t *\t\t\t},\n\t\t\t *\t\t\tview: ( value, writer ) => {\n\t\t\t *\t\t\t\treturn writer.createAttributeElement( 'span', { 'attribute-name': value } );\n\t\t\t *\t\t\t},\n\t\t\t *\t\t\tconverterPriority: 'high'\n\t\t\t *\t\t} ) );\n\t\t\t *\n\t\t\t * @error conversion-attribute-to-attribute-on-text\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'conversion-attribute-to-attribute-on-text: ' +\n\t\t\t\t'Trying to convert text node\\'s attribute with attribute-to-attribute converter.',\n\t\t\t\t[ data, conversionApi ]\n\t\t\t);\n\t\t}\n\n\t\t// First remove the old attribute if there was one.\n\t\tif ( data.attributeOldValue !== null && oldAttribute ) {\n\t\t\tif ( oldAttribute.key == 'class' ) {\n\t\t\t\tconst classes = Array.isArray( oldAttribute.value ) ? oldAttribute.value : [ oldAttribute.value ];\n\n\t\t\t\tfor ( const className of classes ) {\n\t\t\t\t\tviewWriter.removeClass( className, viewElement );\n\t\t\t\t}\n\t\t\t} else if ( oldAttribute.key == 'style' ) {\n\t\t\t\tconst keys = Object.keys( oldAttribute.value );\n\n\t\t\t\tfor ( const key of keys ) {\n\t\t\t\t\tviewWriter.removeStyle( key, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tviewWriter.removeAttribute( oldAttribute.key, viewElement );\n\t\t\t}\n\t\t}\n\n\t\t// Then set the new attribute.\n\t\tif ( data.attributeNewValue !== null && newAttribute ) {\n\t\t\tif ( newAttribute.key == 'class' ) {\n\t\t\t\tconst classes = Array.isArray( newAttribute.value ) ? newAttribute.value : [ newAttribute.value ];\n\n\t\t\t\tfor ( const className of classes ) {\n\t\t\t\t\tviewWriter.addClass( className, viewElement );\n\t\t\t\t}\n\t\t\t} else if ( newAttribute.key == 'style' ) {\n\t\t\t\tconst keys = Object.keys( newAttribute.value );\n\n\t\t\t\tfor ( const key of keys ) {\n\t\t\t\t\tviewWriter.setStyle( key, newAttribute.value[ key ], viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tviewWriter.setAttribute( newAttribute.key, newAttribute.value, viewElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Function factory that creates a converter which converts the text inside marker's range. The converter wraps the text with\n// {@link module:engine/view/attributeelement~AttributeElement} created from the provided descriptor.\n// See {link module:engine/conversion/downcasthelpers~createViewElementFromHighlightDescriptor}.\n//\n// It can also be used to convert the selection that is inside a marker. In that case, an empty attribute element will be\n// created and the selection will be put inside it.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter binds the created {@link module:engine/view/attributeelement~AttributeElement attribute elemens} with the marker name\n// using the {@link module:engine/conversion/mapper~Mapper#bindElementToMarker} method.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction highlightText( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.item ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) && !data.item.is( 'textProxy' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = createViewElementFromHighlightDescriptor( descriptor );\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tif ( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) {\n\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), viewElement, viewSelection );\n\t\t} else {\n\t\t\tconst viewRange = conversionApi.mapper.toViewRange( data.range );\n\t\t\tconst rangeAfterWrap = viewWriter.wrap( viewRange, viewElement );\n\n\t\t\tfor ( const element of rangeAfterWrap.getItems() ) {\n\t\t\t\tif ( element.is( 'attributeElement' ) && element.isSimilar( viewElement ) ) {\n\t\t\t\t\tconversionApi.mapper.bindElementToMarker( element, data.markerName );\n\n\t\t\t\t\t// One attribute element is enough, because all of them are bound together by the view writer.\n\t\t\t\t\t// Mapper uses this binding to get all the elements no matter how many of them are registered in the mapper.\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Converter function factory. It creates a function which applies the marker's highlight to an element inside the marker's range.\n//\n// The converter checks if an element has the `addHighlight` function stored as a\n// {@link module:engine/view/element~Element#_setCustomProperty custom property} and, if so, uses it to apply the highlight.\n// In such case the converter will consume all element's children, assuming that they were handled by the element itself.\n//\n// When the `addHighlight` custom property is not present, the element is not converted in any special way.\n// This means that converters will proceed to convert the element's child nodes.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter binds altered {@link module:engine/view/containerelement~ContainerElement container elements} with the marker name using\n// the {@link module:engine/conversion/mapper~Mapper#bindElementToMarker} method.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction highlightElement( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.item ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !( data.item instanceof ModelElement ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.test( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\n\t\tif ( viewElement && viewElement.getCustomProperty( 'addHighlight' ) ) {\n\t\t\t// Consume element itself.\n\t\t\tconversionApi.consumable.consume( data.item, evt.name );\n\n\t\t\t// Consume all children nodes.\n\t\t\tfor ( const value of ModelRange._createIn( data.item ) ) {\n\t\t\t\tconversionApi.consumable.consume( value.item, evt.name );\n\t\t\t}\n\n\t\t\tviewElement.getCustomProperty( 'addHighlight' )( viewElement, descriptor, conversionApi.writer );\n\n\t\t\tconversionApi.mapper.bindElementToMarker( viewElement, data.markerName );\n\t\t}\n\t};\n}\n\n// Function factory that creates a converter which converts the removing model marker to the view.\n//\n// Both text nodes and elements are handled by this converter but they are handled a bit differently.\n//\n// Text nodes are unwrapped using the {@link module:engine/view/attributeelement~AttributeElement attribute element} created from the\n// provided highlight descriptor. See {link module:engine/conversion/downcasthelpers~HighlightDescriptor}.\n//\n// For elements, the converter checks if an element has the `removeHighlight` function stored as a\n// {@link module:engine/view/element~Element#_setCustomProperty custom property}. If so, it uses it to remove the highlight.\n// In such case, the children of that element will not be converted.\n//\n// When `removeHighlight` is not present, the element is not converted in any special way.\n// The converter will proceed to convert the element's child nodes instead.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter unbinds elements from the marker name.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction removeHighlight( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// This conversion makes sense only for non-collapsed range.\n\t\tif ( data.markerRange.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// View element that will be used to unwrap `AttributeElement`s.\n\t\tconst viewHighlightElement = createViewElementFromHighlightDescriptor( descriptor );\n\n\t\t// Get all elements bound with given marker name.\n\t\tconst elements = conversionApi.mapper.markerNameToElements( data.markerName );\n\n\t\tif ( !elements ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const element of elements ) {\n\t\t\tconversionApi.mapper.unbindElementFromMarkerName( element, data.markerName );\n\n\t\t\tif ( element.is( 'attributeElement' ) ) {\n\t\t\t\tconversionApi.writer.unwrap( conversionApi.writer.createRangeOn( element ), viewHighlightElement );\n\t\t\t} else {\n\t\t\t\t// if element.is( 'containerElement' ).\n\t\t\t\telement.getCustomProperty( 'removeHighlight' )( element, descriptor.id, conversionApi.writer );\n\t\t\t}\n\t\t}\n\n\t\tconversionApi.writer.clearClonedElementsGroup( data.markerName );\n\n\t\tevt.stop();\n\t};\n}\n\n// Model element to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#elementToElement `.elementToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model element to convert.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n// that takes the model element and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n// as parameters and returns a view container element.\n// @returns {Function} Conversion helper.\nfunction downcastElementToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconfig.view = normalizeToElementConfig( config.view, 'container' );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'insert:' + config.model, insertElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model attribute to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#attributeToElement `.attributeToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values }` object. `values` is an array\n// of `String`s with possible values if the model attribute is an enumerable.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function|Object} config.view A view element definition or a function\n// that takes the model attribute value and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n// as parameters and returns a view attribute element. If `config.model.values` is\n// given, `config.view` should be an object assigning values from `config.model.values` to view element definitions or functions.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastAttributeToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst modelKey = config.model.key ? config.model.key : config.model;\n\tlet eventName = 'attribute:' + modelKey;\n\n\tif ( config.model.name ) {\n\t\teventName += ':' + config.model.name;\n\t}\n\n\tif ( config.model.values ) {\n\t\tfor ( const modelValue of config.model.values ) {\n\t\t\tconfig.view[ modelValue ] = normalizeToElementConfig( config.view[ modelValue ], 'attribute' );\n\t\t}\n\t} else {\n\t\tconfig.view = normalizeToElementConfig( config.view, 'attribute' );\n\t}\n\n\tconst elementCreator = getFromAttributeCreator( config );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, wrap( elementCreator ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model attribute to view attribute conversion helper.\n//\n// See {@link ~DowncastHelpers#attributeToAttribute `.attributeToAttribute()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values, [ name ] }` object describing\n// the attribute key, possible values and, optionally, an element name to convert from.\n// @param {String|Object|Function} config.view A view attribute key, or a `{ key, value }` object or a function that takes\n// the model attribute value and returns a `{ key, value }` object. If `key` is `'class'`, `value` can be a `String` or an\n// array of `String`s. If `key` is `'style'`, `value` is an object with key-value pairs. In other cases, `value` is a `String`.\n// If `config.model.values` is set, `config.view` should be an object assigning values from `config.model.values` to\n// `{ key, value }` objects or a functions.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastAttributeToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst modelKey = config.model.key ? config.model.key : config.model;\n\tlet eventName = 'attribute:' + modelKey;\n\n\tif ( config.model.name ) {\n\t\teventName += ':' + config.model.name;\n\t}\n\n\tif ( config.model.values ) {\n\t\tfor ( const modelValue of config.model.values ) {\n\t\t\tconfig.view[ modelValue ] = normalizeToAttributeConfig( config.view[ modelValue ] );\n\t\t}\n\t} else {\n\t\tconfig.view = normalizeToAttributeConfig( config.view );\n\t}\n\n\tconst elementCreator = getFromAttributeCreator( config );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, changeAttribute( elementCreator ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model marker to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#markerToElement `.markerToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model marker (or model marker group) to convert.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n// that takes the model marker data as a parameter and returns a view UI element.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastMarkerToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconfig.view = normalizeToElementConfig( config.view, 'ui' );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'addMarker:' + config.model, insertUIElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'removeMarker:' + config.model, removeUIElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model marker to highlight conversion helper.\n//\n// See {@link ~DowncastHelpers#markerToElement `.markerToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model marker (or model marker group) to convert.\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} config.view A highlight descriptor\n// that will be used for highlighting or a function that takes the model marker data as a parameter and returns a highlight descriptor.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastMarkerToHighlight( config ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'addMarker:' + config.model, highlightText( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'addMarker:' + config.model, highlightElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'removeMarker:' + config.model, removeHighlight( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Takes `config.view`, and if it is an {@link module:engine/view/elementdefinition~ElementDefinition}, converts it\n// to a function (because lower level converters accept only element creator functions).\n//\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} view View configuration.\n// @param {'container'|'attribute'|'ui'} viewElementType View element type to create.\n// @returns {Function} Element creator function to use in lower level converters.\nfunction normalizeToElementConfig( view, viewElementType ) {\n\tif ( typeof view == 'function' ) {\n\t\t// If `view` is already a function, don't do anything.\n\t\treturn view;\n\t}\n\n\treturn ( modelData, viewWriter ) => createViewElementFromDefinition( view, viewWriter, viewElementType );\n}\n\n// Creates a view element instance from the provided {@link module:engine/view/elementdefinition~ElementDefinition} and class.\n//\n// @param {module:engine/view/elementdefinition~ElementDefinition} viewElementDefinition\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @param {'container'|'attribute'|'ui'} viewElementType\n// @returns {module:engine/view/element~Element}\nfunction createViewElementFromDefinition( viewElementDefinition, viewWriter, viewElementType ) {\n\tif ( typeof viewElementDefinition == 'string' ) {\n\t\t// If `viewElementDefinition` is given as a `String`, normalize it to an object with `name` property.\n\t\tviewElementDefinition = { name: viewElementDefinition };\n\t}\n\n\tlet element;\n\tconst attributes = Object.assign( {}, viewElementDefinition.attributes );\n\n\tif ( viewElementType == 'container' ) {\n\t\telement = viewWriter.createContainerElement( viewElementDefinition.name, attributes );\n\t} else if ( viewElementType == 'attribute' ) {\n\t\tconst options = {\n\t\t\tpriority: viewElementDefinition.priority || ViewAttributeElement.DEFAULT_PRIORITY\n\t\t};\n\n\t\telement = viewWriter.createAttributeElement( viewElementDefinition.name, attributes, options );\n\t} else {\n\t\t// 'ui'.\n\t\telement = viewWriter.createUIElement( viewElementDefinition.name, attributes );\n\t}\n\n\tif ( viewElementDefinition.styles ) {\n\t\tconst keys = Object.keys( viewElementDefinition.styles );\n\n\t\tfor ( const key of keys ) {\n\t\t\tviewWriter.setStyle( key, viewElementDefinition.styles[ key ], element );\n\t\t}\n\t}\n\n\tif ( viewElementDefinition.classes ) {\n\t\tconst classes = viewElementDefinition.classes;\n\n\t\tif ( typeof classes == 'string' ) {\n\t\t\tviewWriter.addClass( classes, element );\n\t\t} else {\n\t\t\tfor ( const className of classes ) {\n\t\t\t\tviewWriter.addClass( className, element );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn element;\n}\n\nfunction getFromAttributeCreator( config ) {\n\tif ( config.model.values ) {\n\t\treturn ( modelAttributeValue, viewWriter ) => {\n\t\t\tconst view = config.view[ modelAttributeValue ];\n\n\t\t\tif ( view ) {\n\t\t\t\treturn view( modelAttributeValue, viewWriter );\n\t\t\t}\n\n\t\t\treturn null;\n\t\t};\n\t} else {\n\t\treturn config.view;\n\t}\n}\n\n// Takes the configuration, adds default parameters if they do not exist and normalizes other parameters to be used in downcast converters\n// for generating a view attribute.\n//\n// @param {Object} view View configuration.\nfunction normalizeToAttributeConfig( view ) {\n\tif ( typeof view == 'string' ) {\n\t\treturn modelAttributeValue => ( { key: view, value: modelAttributeValue } );\n\t} else if ( typeof view == 'object' ) {\n\t\t// { key, value, ... }\n\t\tif ( view.value ) {\n\t\t\treturn () => view;\n\t\t}\n\t\t// { key, ... }\n\t\telse {\n\t\t\treturn modelAttributeValue => ( { key: view.key, value: modelAttributeValue } );\n\t\t}\n\t} else {\n\t\t// function.\n\t\treturn view;\n\t}\n}\n\n// Helper function for `highlight`. Prepares the actual descriptor object using value passed to the converter.\nfunction prepareDescriptor( highlightDescriptor, data, conversionApi ) {\n\t// If passed descriptor is a creator function, call it. If not, just use passed value.\n\tconst descriptor = typeof highlightDescriptor == 'function' ?\n\t\thighlightDescriptor( data, conversionApi ) :\n\t\thighlightDescriptor;\n\n\tif ( !descriptor ) {\n\t\treturn null;\n\t}\n\n\t// Apply default descriptor priority.\n\tif ( !descriptor.priority ) {\n\t\tdescriptor.priority = 10;\n\t}\n\n\t// Default descriptor id is marker name.\n\tif ( !descriptor.id ) {\n\t\tdescriptor.id = data.markerName;\n\t}\n\n\treturn descriptor;\n}\n\n/**\n * An object describing how the marker highlight should be represented in the view.\n *\n * Each text node contained in a highlighted range will be wrapped in a `<span>`\n * {@link module:engine/view/attributeelement~AttributeElement view attribute element} with CSS class(es), attributes and a priority\n * described by this object.\n *\n * Additionally, each {@link module:engine/view/containerelement~ContainerElement container element} can handle displaying the highlight\n * separately by providing the `addHighlight` and `removeHighlight` custom properties. In this case:\n *\n * * The `HighlightDescriptor` object is passed to the `addHighlight` function upon conversion and should be used to apply the highlight to\n * the element.\n * * The descriptor `id` is passed to the `removeHighlight` function upon conversion and should be used to remove the highlight with the\n * given ID from the element.\n *\n * @typedef {Object} module:engine/conversion/downcasthelpers~HighlightDescriptor\n *\n * @property {String|Array.<String>} classes A CSS class or an array of classes to set. If the descriptor is used to\n * create an {@link module:engine/view/attributeelement~AttributeElement attribute element} over text nodes, these classes will be set\n * on that attribute element. If the descriptor is applied to an element, usually these classes will be set on that element, however,\n * this depends on how the element converts the descriptor.\n *\n * @property {String} [id] Descriptor identifier. If not provided, it defaults to the converted marker's name.\n *\n * @property {Number} [priority] Descriptor priority. If not provided, it defaults to `10`. If the descriptor is used to create\n * an {@link module:engine/view/attributeelement~AttributeElement attribute element}, it will be that element's\n * {@link module:engine/view/attributeelement~AttributeElement#priority priority}. If the descriptor is applied to an element,\n * the priority will be used to determine which descriptor is more important.\n *\n * @property {Object} [attributes] Attributes to set. If the descriptor is used to create\n * an {@link module:engine/view/attributeelement~AttributeElement attribute element} over text nodes, these attributes will be set on that\n * attribute element. If the descriptor is applied to an element, usually these attributes will be set on that element, however,\n * this depends on how the element converts the descriptor.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Matcher from '../view/matcher';\nimport ModelRange from '../model/range';\nimport ConversionHelpers from './conversionhelpers';\n\nimport { cloneDeep } from 'lodash-es';\nimport ModelSelection from '../model/selection';\n\n/**\n * Contains {@link module:engine/view/view view} to {@link module:engine/model/model model} converters for\n * {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}.\n *\n * @module engine/conversion/upcasthelpers\n */\n\n/**\n * Upcast conversion helper functions.\n *\n * @extends module:engine/conversion/conversionhelpers~ConversionHelpers\n */\nexport default class UpcastHelpers extends ConversionHelpers {\n\t/**\n\t * View element to model element conversion helper.\n\t *\n\t * This conversion results in creating a model element. For example,\n\t * view `<p>Foo</p>` becomes `<paragraph>Foo</paragraph>` in the model.\n\t *\n\t * Keep in mind that the element will be inserted only if it is allowed\n\t * by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: 'p',\n\t *\t\t\tmodel: 'paragraph'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: 'p',\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t},\n\t *\t\t\tmodel: 'fancyParagraph'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t * \t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'heading'\n\t * \t\t\t},\n\t * \t\t\tmodel: ( viewElement, modelWriter ) => {\n\t * \t\t\t\treturn modelWriter.createElement( 'heading', { level: viewElement.getAttribute( 'data-level' ) } );\n\t * \t\t\t}\n\t * \t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} [config.view] Pattern matching all view elements which should be converted. If not\n\t * set, the converter will fire for every view element.\n\t * @param {String|module:engine/model/element~Element|Function} config.model Name of the model element, a model element\n\t * instance or a function that takes a view element and returns a model element. The model element will be inserted in the model.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToElement( config ) {\n\t\treturn this.add( upcastElementToElement( config ) );\n\t}\n\n\t/**\n\t * View element to model attribute conversion helper.\n\t *\n\t * This conversion results in setting an attribute on a model node. For example, view `<strong>Foo</strong>` becomes\n\t * `Foo` {@link module:engine/model/text~Text model text node} with `bold` attribute set to `true`.\n\t *\n\t * This helper is meant to set a model attribute on all the elements that are inside the converted element:\n\t *\n\t *\t\t<strong>Foo</strong> --> <strong><p>Foo</p></strong> --> <paragraph><$text bold=\"true\">Foo</$text></paragraph>\n\t *\n\t * Above is a sample of HTML code, that goes through autoparagraphing (first step) and then is converted (second step).\n\t * Even though `<strong>` is over `<p>` element, `bold=\"true\"` was added to the text. See\n\t * {@link module:engine/conversion/upcasthelpers~UpcastHelpers#attributeToAttribute} for comparison.\n\t *\n\t * Keep in mind that the attribute will be set only if it is allowed by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: 'strong',\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: 'strong',\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: 'bold'\n\t *\t\t\t},\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: [ 'styled', 'styled-dark' ]\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled',\n\t *\t\t\t\tvalue: 'dark'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * \t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'font-size': /[\\s\\S]+/\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalue: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\t\t\t\t\tconst value = fontSize.substr( 0, fontSize.length - 2 );\n\t *\n\t *\t\t\t\t\tif ( value <= 10 ) {\n\t *\t\t\t\t\t\treturn 'small';\n\t *\t\t\t\t\t} else if ( value > 12 ) {\n\t *\t\t\t\t\t\treturn 'big';\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n\t * @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n\t * the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n\t * If `String` is given, the model attribute value will be set to `true`.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToAttribute( config ) {\n\t\treturn this.add( upcastElementToAttribute( config ) );\n\t}\n\n\t/**\n\t * View attribute to model attribute conversion helper.\n\t *\n\t * This conversion results in setting an attribute on a model node. For example, view `<img src=\"foo.jpg\"></img>` becomes\n\t * `<image source=\"foo.jpg\"></image>` in the model.\n\t *\n\t * This helper is meant to convert view attributes from view elements which got converted to the model, so the view attribute\n\t * is set only on the corresponding model node:\n\t *\n\t *\t\t<div class=\"dark\"><div>foo</div></div> --> <div dark=\"true\"><div>foo</div></div>\n\t *\n\t * Above, `class=\"dark\"` attribute is added only to the `<div>` elements that has it. This is in contrary to\n\t * {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToAttribute} which sets attributes for\n\t * all the children in the model:\n\t *\n\t *\t\t<strong>Foo</strong> --> <strong><p>Foo</p></strong> --> <paragraph><$text bold=\"true\">Foo</$text></paragraph>\n\t *\n\t * Above is a sample of HTML code, that goes through autoparagraphing (first step) and then is converted (second step).\n\t * Even though `<strong>` is over `<p>` element, `bold=\"true\"` was added to the text.\n\t *\n\t * Keep in mind that the attribute will be set only if it is allowed by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: 'src',\n\t *\t\t\tmodel: 'source'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: { key: 'src' },\n\t *\t\t\tmodel: 'source'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: { key: 'src' },\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tconverterPriority: 'normal'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tkey: 'data-style',\n\t *\t\t\t\tvalue: /[\\s\\S]+/\n\t *\t\t\t},\n\t *\t\t\tmodel: 'styled'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'img',\n\t *\t\t\t\tkey: 'class',\n\t *\t\t\t\tvalue: 'styled-dark'\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled',\n\t *\t\t\t\tvalue: 'dark'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tkey: 'class',\n\t *\t\t\t\tvalue: /styled-[\\S]+/\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled'\n\t *\t\t\t\tvalue: viewElement => {\n\t *\t\t\t\t\tconst regexp = /styled-([\\S]+)/;\n\t *\t\t\t\t\tconst match = viewElement.getAttribute( 'class' ).match( regexp );\n\t *\n\t *\t\t\t\t\treturn match[ 1 ];\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Converting styles works a bit differently as it requires `view.styles` to be an object and by default\n\t * a model attribute will be set to `true` by such a converter. You can set the model attribute to any value by providing the `value`\n\t * callback that returns the desired value.\n\t *\n\t *\t\t// Default conversion of font-weight style will result in setting bold attribute to true.\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'font-weight': 'bold'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\t// This converter will pass any style value to the `lineHeight` model attribute.\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'line-height': /[\\s\\S]+/\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'lineHeight',\n\t *\t\t\t\tvalue: viewElement => viewElement.getStyle( 'line-height' )\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.view Specifies which view attribute will be converted. If a `String` is passed,\n\t * attributes with given key will be converted. If an `Object` is passed, it must have a required `key` property,\n\t * specifying view attribute key, and may have an optional `value` property, specifying view attribute value and optional `name`\n\t * property specifying a view element name from/on which the attribute should be converted. `value` can be given as a `String`,\n\t * a `RegExp` or a function callback, that takes view attribute value as the only parameter and returns `Boolean`.\n\t * @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n\t * the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n\t * If `String` is given, the model attribute value will be same as view attribute value.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tattributeToAttribute( config ) {\n\t\treturn this.add( upcastAttributeToAttribute( config ) );\n\t}\n\n\t/**\n\t * View element to model marker conversion helper.\n\t *\n\t * This conversion results in creating a model marker. For example, if the marker was stored in a view as an element:\n\t * `<p>Fo<span data-marker=\"comment\" data-comment-id=\"7\"></span>o</p><p>B<span data-marker=\"comment\" data-comment-id=\"7\"></span>ar</p>`,\n\t * after the conversion is done, the marker will be available in\n\t * {@link module:engine/model/model~Model#markers model document markers}.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: 'search'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: viewElement => 'comment:' + viewElement.getAttribute( 'data-comment-id' )\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tattributes: {\n\t *\t\t\t\t\t'data-marker': 'search'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: 'search'\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToMarker\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n\t * @param {String|Function} config.model Name of the model marker, or a function that takes a view element and returns\n\t * a model marker name.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToMarker( config ) {\n\t\treturn this.add( upcastElementToMarker( config ) );\n\t}\n}\n\n/**\n * Function factory, creates a converter that converts {@link module:engine/view/documentfragment~DocumentFragment view document fragment}\n * or all children of {@link module:engine/view/element~Element} into\n * {@link module:engine/model/documentfragment~DocumentFragment model document fragment}.\n * This is the \"entry-point\" converter for upcast (view to model conversion). This converter starts the conversion of all children\n * of passed view document fragment. Those children {@link module:engine/view/node~Node view nodes} are then handled by other converters.\n *\n * This also a \"default\", last resort converter for all view elements that has not been converted by other converters.\n * When a view element is being converted to the model but it does not have converter specified, that view element\n * will be converted to {@link module:engine/model/documentfragment~DocumentFragment model document fragment} and returned.\n *\n * @returns {Function} Universal converter for view {@link module:engine/view/documentfragment~DocumentFragment fragments} and\n * {@link module:engine/view/element~Element elements} that returns\n * {@link module:engine/model/documentfragment~DocumentFragment model fragment} with children of converted view item.\n */\nexport function convertToModelFragment() {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Second argument in `consumable.consume` is discarded for ViewDocumentFragment but is needed for ViewElement.\n\t\tif ( !data.modelRange && conversionApi.consumable.consume( data.viewItem, { name: true } ) ) {\n\t\t\tconst { modelRange, modelCursor } = conversionApi.convertChildren( data.viewItem, data.modelCursor );\n\n\t\t\tdata.modelRange = modelRange;\n\t\t\tdata.modelCursor = modelCursor;\n\t\t}\n\t};\n}\n\n/**\n * Function factory, creates a converter that converts {@link module:engine/view/text~Text} to {@link module:engine/model/text~Text}.\n *\n * @returns {Function} {@link module:engine/view/text~Text View text} converter.\n */\nexport function convertText() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( conversionApi.schema.checkChild( data.modelCursor, '$text' ) ) {\n\t\t\tif ( conversionApi.consumable.consume( data.viewItem ) ) {\n\t\t\t\tconst text = conversionApi.writer.createText( data.viewItem.data );\n\n\t\t\t\tconversionApi.writer.insert( text, data.modelCursor );\n\n\t\t\t\tdata.modelRange = ModelRange._createFromPositionAndShift( data.modelCursor, text.offsetSize );\n\t\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * Function factory, creates a callback function which converts a {@link module:engine/view/selection~Selection\n * view selection} taken from the {@link module:engine/view/document~Document#event:selectionChange} event\n * and sets in on the {@link module:engine/model/document~Document#selection model}.\n *\n * **Note**: because there is no view selection change dispatcher nor any other advanced view selection to model\n * conversion mechanism, the callback should be set directly on view document.\n *\n *\t\tview.document.on( 'selectionChange', convertSelectionChange( modelDocument, mapper ) );\n *\n * @param {module:engine/model/model~Model} model Data model.\n * @param {module:engine/conversion/mapper~Mapper} mapper Conversion mapper.\n * @returns {Function} {@link module:engine/view/document~Document#event:selectionChange} callback function.\n */\nexport function convertSelectionChange( model, mapper ) {\n\treturn ( evt, data ) => {\n\t\tconst viewSelection = data.newSelection;\n\t\tconst modelSelection = new ModelSelection();\n\n\t\tconst ranges = [];\n\n\t\tfor ( const viewRange of viewSelection.getRanges() ) {\n\t\t\tranges.push( mapper.toModelRange( viewRange ) );\n\t\t}\n\n\t\tmodelSelection.setTo( ranges, { backward: viewSelection.isBackward } );\n\n\t\tif ( !modelSelection.isEqual( model.document.selection ) ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( modelSelection );\n\t\t\t} );\n\t\t}\n\t};\n}\n\n// View element to model element conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToElement `.elementToElement()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} [config.view] Pattern matching all view elements which should be converted. If not\n// set, the converter will fire for every view element.\n// @param {String|module:engine/model/element~Element|Function} config.model Name of the model element, a model element\n// instance or a function that takes a view element and returns a model element. The model element will be inserted in the model.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst converter = prepareToElementConverter( config );\n\n\tconst elementName = getViewElementNameFromConfig( config.view );\n\tconst eventName = elementName ? 'element:' + elementName : 'element';\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, converter, { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// View element to model attribute conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToAttribute `.elementToAttribute()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n// @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n// the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n// If `String` is given, the model attribute value will be set to `true`.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tnormalizeModelAttributeConfig( config );\n\n\tconst converter = prepareToAttributeConverter( config, false );\n\n\tconst elementName = getViewElementNameFromConfig( config.view );\n\tconst eventName = elementName ? 'element:' + elementName : 'element';\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, converter, { priority: config.converterPriority || 'low' } );\n\t};\n}\n\n// View attribute to model attribute conversion helper.\n//\n// See {@link ~UpcastHelpers#attributeToAttribute `.attributeToAttribute()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.view Specifies which view attribute will be converted. If a `String` is passed,\n// attributes with given key will be converted. If an `Object` is passed, it must have a required `key` property,\n// specifying view attribute key, and may have an optional `value` property, specifying view attribute value and optional `name`\n// property specifying a view element name from/on which the attribute should be converted. `value` can be given as a `String`,\n// a `RegExp` or a function callback, that takes view attribute value as the only parameter and returns `Boolean`.\n// @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n// the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n// If `String` is given, the model attribute value will be same as view attribute value.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastAttributeToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tlet viewKey = null;\n\n\tif ( typeof config.view == 'string' || config.view.key ) {\n\t\tviewKey = normalizeViewAttributeKeyValueConfig( config );\n\t}\n\n\tnormalizeModelAttributeConfig( config, viewKey );\n\n\tconst converter = prepareToAttributeConverter( config, true );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element', converter, { priority: config.converterPriority || 'low' } );\n\t};\n}\n\n// View element to model marker conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToMarker `.elementToMarker()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n// @param {String|Function} config.model Name of the model marker, or a function that takes a view element and returns\n// a model marker name.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToMarker( config ) {\n\tconfig = cloneDeep( config );\n\n\tnormalizeToMarkerConfig( config );\n\n\treturn upcastElementToElement( config );\n}\n\n// Helper function for from-view-element conversion. Checks if `config.view` directly specifies converted view element's name\n// and if so, returns it.\n//\n// @param {Object} config Conversion view config.\n// @returns {String|null} View element name or `null` if name is not directly set.\nfunction getViewElementNameFromConfig( viewConfig ) {\n\tif ( typeof viewConfig == 'string' ) {\n\t\treturn viewConfig;\n\t}\n\n\tif ( typeof viewConfig == 'object' && typeof viewConfig.name == 'string' ) {\n\t\treturn viewConfig.name;\n\t}\n\n\treturn null;\n}\n\n// Helper for to-model-element conversion. Takes a config object and returns a proper converter function.\n//\n// @param {Object} config Conversion configuration.\n// @returns {Function} View to model converter.\nfunction prepareToElementConverter( config ) {\n\tconst matcher = config.view ? new Matcher( config.view ) : null;\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tlet match = {};\n\n\t\t// If `config.view` has not been passed do not try matching. In this case, the converter should fire for all elements.\n\t\tif ( matcher ) {\n\t\t\t// This will be usually just one pattern but we support matchers with many patterns too.\n\t\t\tconst matcherResult = matcher.match( data.viewItem );\n\n\t\t\t// If there is no match, this callback should not do anything.\n\t\t\tif ( !matcherResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tmatch = matcherResult.match;\n\t\t}\n\n\t\t// Force consuming element's name.\n\t\tmatch.name = true;\n\n\t\t// Create model element basing on config.\n\t\tconst modelElement = getModelElement( config.model, data.viewItem, conversionApi.writer );\n\n\t\t// Do not convert if element building function returned falsy value.\n\t\tif ( !modelElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// When element was already consumed then skip it.\n\t\tif ( !conversionApi.consumable.test( data.viewItem, match ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Find allowed parent for element that we are going to insert.\n\t\t// If current parent does not allow to insert element but one of the ancestors does\n\t\t// then split nodes to allowed parent.\n\t\tconst splitResult = conversionApi.splitToAllowedParent( modelElement, data.modelCursor );\n\n\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\tif ( !splitResult ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Insert element on allowed position.\n\t\tconversionApi.writer.insert( modelElement, splitResult.position );\n\n\t\t// Convert children and insert to element.\n\t\tconversionApi.convertChildren( data.viewItem, conversionApi.writer.createPositionAt( modelElement, 0 ) );\n\n\t\t// Consume appropriate value from consumable values list.\n\t\tconversionApi.consumable.consume( data.viewItem, match );\n\n\t\tconst parts = conversionApi.getSplitParts( modelElement );\n\n\t\t// Set conversion result range.\n\t\tdata.modelRange = new ModelRange(\n\t\t\tconversionApi.writer.createPositionBefore( modelElement ),\n\t\t\tconversionApi.writer.createPositionAfter( parts[ parts.length - 1 ] )\n\t\t);\n\n\t\t// Now we need to check where the `modelCursor` should be.\n\t\tif ( splitResult.cursorParent ) {\n\t\t\t// If we split parent to insert our element then we want to continue conversion in the new part of the split parent.\n\t\t\t//\n\t\t\t// before: <allowed><notAllowed>foo[]</notAllowed></allowed>\n\t\t\t// after: <allowed><notAllowed>foo</notAllowed><converted></converted><notAllowed>[]</notAllowed></allowed>\n\n\t\t\tdata.modelCursor = conversionApi.writer.createPositionAt( splitResult.cursorParent, 0 );\n\t\t} else {\n\t\t\t// Otherwise just continue after inserted element.\n\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t}\n\t};\n}\n\n// Helper function for upcasting-to-element converter. Takes the model configuration, the converted view element\n// and a writer instance and returns a model element instance to be inserted in the model.\n//\n// @param {String|Function|module:engine/model/element~Element} model Model conversion configuration.\n// @param {module:engine/view/node~Node} input The converted view node.\n// @param {module:engine/model/writer~Writer} writer A writer instance to use to create the model element.\nfunction getModelElement( model, input, writer ) {\n\tif ( model instanceof Function ) {\n\t\treturn model( input, writer );\n\t} else {\n\t\treturn writer.createElement( model );\n\t}\n}\n\n// Helper function view-attribute-to-model-attribute helper. Normalizes `config.view` which was set as `String` or\n// as an `Object` with `key`, `value` and `name` properties. Normalized `config.view` has is compatible with\n// {@link module:engine/view/matcher~MatcherPattern}.\n//\n// @param {Object} config Conversion config.\n// @returns {String} Key of the converted view attribute.\nfunction normalizeViewAttributeKeyValueConfig( config ) {\n\tif ( typeof config.view == 'string' ) {\n\t\tconfig.view = { key: config.view };\n\t}\n\n\tconst key = config.view.key;\n\tlet normalized;\n\n\tif ( key == 'class' || key == 'style' ) {\n\t\tconst keyName = key == 'class' ? 'classes' : 'styles';\n\n\t\tnormalized = {\n\t\t\t[ keyName ]: config.view.value\n\t\t};\n\t} else {\n\t\tconst value = typeof config.view.value == 'undefined' ? /[\\s\\S]*/ : config.view.value;\n\n\t\tnormalized = {\n\t\t\tattributes: {\n\t\t\t\t[ key ]: value\n\t\t\t}\n\t\t};\n\t}\n\n\tif ( config.view.name ) {\n\t\tnormalized.name = config.view.name;\n\t}\n\n\tconfig.view = normalized;\n\n\treturn key;\n}\n\n// Helper function that normalizes `config.model` in from-model-attribute conversion. `config.model` can be set\n// as a `String`, an `Object` with only `key` property or an `Object` with `key` and `value` properties. Normalized\n// `config.model` is an `Object` with `key` and `value` properties.\n//\n// @param {Object} config Conversion config.\n// @param {String} viewAttributeKeyToCopy Key of the converted view attribute. If it is set, model attribute value\n// will be equal to view attribute value.\nfunction normalizeModelAttributeConfig( config, viewAttributeKeyToCopy = null ) {\n\tconst defaultModelValue = viewAttributeKeyToCopy === null ? true : viewElement => viewElement.getAttribute( viewAttributeKeyToCopy );\n\n\tconst key = typeof config.model != 'object' ? config.model : config.model.key;\n\tconst value = typeof config.model != 'object' || typeof config.model.value == 'undefined' ? defaultModelValue : config.model.value;\n\n\tconfig.model = { key, value };\n}\n\n// Helper for to-model-attribute conversion. Takes the model attribute name and conversion configuration and returns\n// a proper converter function.\n//\n// @param {String} modelAttributeKey The key of the model attribute to set on a model node.\n// @param {Object|Array.<Object>} config Conversion configuration. It is possible to provide multiple configurations in an array.\n// @param {Boolean} shallow If set to `true` the attribute will be set only on top-level nodes. Otherwise, it will be set\n// on all elements in the range.\nfunction prepareToAttributeConverter( config, shallow ) {\n\tconst matcher = new Matcher( config.view );\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst match = matcher.match( data.viewItem );\n\n\t\t// If there is no match, this callback should not do anything.\n\t\tif ( !match ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelKey = config.model.key;\n\t\tconst modelValue = typeof config.model.value == 'function' ? config.model.value( data.viewItem ) : config.model.value;\n\n\t\t// Do not convert if attribute building function returned falsy value.\n\t\tif ( modelValue === null ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( onlyViewNameIsDefined( config.view, data.viewItem ) ) {\n\t\t\tmatch.match.name = true;\n\t\t} else {\n\t\t\t// Do not test or consume `name` consumable.\n\t\t\tdelete match.match.name;\n\t\t}\n\n\t\t// Try to consume appropriate values from consumable values list.\n\t\tif ( !conversionApi.consumable.test( data.viewItem, match.match ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Since we are converting to attribute we need an range on which we will set the attribute.\n\t\t// If the range is not created yet, we will create it.\n\t\tif ( !data.modelRange ) {\n\t\t\t// Convert children and set conversion result as a current data.\n\t\t\tdata = Object.assign( data, conversionApi.convertChildren( data.viewItem, data.modelCursor ) );\n\t\t}\n\n\t\t// Set attribute on current `output`. `Schema` is checked inside this helper function.\n\t\tconst attributeWasSet = setAttributeOn( data.modelRange, { key: modelKey, value: modelValue }, shallow, conversionApi );\n\n\t\tif ( attributeWasSet ) {\n\t\t\tconversionApi.consumable.consume( data.viewItem, match.match );\n\t\t}\n\t};\n}\n\n// Helper function that checks if element name should be consumed in attribute converters.\n//\n// @param {Object} config Conversion view config.\n// @returns {Boolean}\nfunction onlyViewNameIsDefined( viewConfig, viewItem ) {\n\t// https://github.com/ckeditor/ckeditor5-engine/issues/1786\n\tconst configToTest = typeof viewConfig == 'function' ? viewConfig( viewItem ) : viewConfig;\n\n\tif ( typeof configToTest == 'object' && !getViewElementNameFromConfig( configToTest ) ) {\n\t\treturn false;\n\t}\n\n\treturn !configToTest.classes && !configToTest.attributes && !configToTest.styles;\n}\n\n// Helper function for to-model-attribute converter. Sets model attribute on given range. Checks {@link module:engine/model/schema~Schema}\n// to ensure proper model structure.\n//\n// @param {module:engine/model/range~Range} modelRange Model range on which attribute should be set.\n// @param {Object} modelAttribute Model attribute to set.\n// @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion API.\n// @param {Boolean} shallow If set to `true` the attribute will be set only on top-level nodes. Otherwise, it will be set\n// on all elements in the range.\n// @returns {Boolean} `true` if attribute was set on at least one node from given `modelRange`.\nfunction setAttributeOn( modelRange, modelAttribute, shallow, conversionApi ) {\n\tlet result = false;\n\n\t// Set attribute on each item in range according to Schema.\n\tfor ( const node of Array.from( modelRange.getItems( { shallow } ) ) ) {\n\t\tif ( conversionApi.schema.checkAttribute( node, modelAttribute.key ) ) {\n\t\t\tconversionApi.writer.setAttribute( modelAttribute.key, modelAttribute.value, node );\n\n\t\t\tresult = true;\n\t\t}\n\t}\n\n\treturn result;\n}\n\n// Helper function for upcasting-to-marker conversion. Takes the config in a format requested by `upcastElementToMarker()`\n// function and converts it to a format that is supported by `_upcastElementToElement()` function.\n//\n// @param {Object} config Conversion configuration.\nfunction normalizeToMarkerConfig( config ) {\n\tconst oldModel = config.model;\n\n\tconfig.model = ( viewElement, modelWriter ) => {\n\t\tconst markerName = typeof oldModel == 'string' ? oldModel : oldModel( viewElement );\n\n\t\treturn modelWriter.createElement( '$marker', { 'data-name': markerName } );\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/controller/editingcontroller\n */\n\nimport RootEditableElement from '../view/rooteditableelement';\nimport View from '../view/view';\nimport Mapper from '../conversion/mapper';\nimport DowncastDispatcher from '../conversion/downcastdispatcher';\nimport { clearAttributes, convertCollapsedSelection, convertRangeSelection, insertText, remove } from '../conversion/downcasthelpers';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { convertSelectionChange } from '../conversion/upcasthelpers';\n\n// @if CK_DEBUG_ENGINE // const { dumpTrees, initDocumentDumping } = require( '../dev-utils/utils' );\n\n/**\n * Controller for the editing pipeline. The editing pipeline controls {@link ~EditingController#model model} rendering,\n * including selection handling. It also creates the {@link ~EditingController#view view} which builds a\n * browser-independent virtualization over the DOM elements. The editing controller also attaches default converters.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class EditingController {\n\t/**\n\t * Creates an editing controller instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Editing model.\n\t */\n\tconstructor( model ) {\n\t\t/**\n\t\t * Editor model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Editing view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = new View();\n\n\t\t/**\n\t\t * Mapper which describes the model-view binding.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/mapper~Mapper}\n\t\t */\n\t\tthis.mapper = new Mapper();\n\n\t\t/**\n\t\t * Downcast dispatcher that converts changes from the model to {@link #view the editing view}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher} #downcastDispatcher\n\t\t */\n\t\tthis.downcastDispatcher = new DowncastDispatcher( {\n\t\t\tmapper: this.mapper\n\t\t} );\n\n\t\tconst doc = this.model.document;\n\t\tconst selection = doc.selection;\n\t\tconst markers = this.model.markers;\n\n\t\t// When plugins listen on model changes (on selection change, post fixers, etc) and change the view as a result of\n\t\t// model's change, they might trigger view rendering before the conversion is completed (e.g. before the selection\n\t\t// is converted). We disable rendering for the length of the outermost model change() block to prevent that.\n\t\t//\n\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/1528\n\t\tthis.listenTo( this.model, '_beforeChanges', () => {\n\t\t\tthis.view._disableRendering( true );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( this.model, '_afterChanges', () => {\n\t\t\tthis.view._disableRendering( false );\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Whenever model document is changed, convert those changes to the view (using model.Document#differ).\n\t\t// Do it on 'low' priority, so changes are converted after other listeners did their job.\n\t\t// Also convert model selection.\n\t\tthis.listenTo( doc, 'change', () => {\n\t\t\tthis.view.change( writer => {\n\t\t\t\tthis.downcastDispatcher.convertChanges( doc.differ, markers, writer );\n\t\t\t\tthis.downcastDispatcher.convertSelection( selection, markers, writer );\n\t\t\t} );\n\t\t}, { priority: 'low' } );\n\n\t\t// Convert selection from the view to the model when it changes in the view.\n\t\tthis.listenTo( this.view.document, 'selectionChange', convertSelectionChange( this.model, this.mapper ) );\n\n\t\t// Attach default model converters.\n\t\tthis.downcastDispatcher.on( 'insert:$text', insertText(), { priority: 'lowest' } );\n\t\tthis.downcastDispatcher.on( 'remove', remove(), { priority: 'low' } );\n\n\t\t// Attach default model selection converters.\n\t\tthis.downcastDispatcher.on( 'selection', clearAttributes(), { priority: 'low' } );\n\t\tthis.downcastDispatcher.on( 'selection', convertRangeSelection(), { priority: 'low' } );\n\t\tthis.downcastDispatcher.on( 'selection', convertCollapsedSelection(), { priority: 'low' } );\n\n\t\t// Binds {@link module:engine/view/document~Document#roots view roots collection} to\n\t\t// {@link module:engine/model/document~Document#roots model roots collection} so creating\n\t\t// model root automatically creates corresponding view root.\n\t\tthis.view.document.roots.bindTo( this.model.document.roots ).using( root => {\n\t\t\t// $graveyard is a special root that has no reflection in the view.\n\t\t\tif ( root.rootName == '$graveyard' ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewRoot = new RootEditableElement( root.name );\n\n\t\t\tviewRoot.rootName = root.rootName;\n\t\t\tviewRoot._document = this.view.document;\n\t\t\tthis.mapper.bindElements( root, viewRoot );\n\n\t\t\treturn viewRoot;\n\t\t} );\n\n\t\t// @if CK_DEBUG_ENGINE // initDocumentDumping( this.model.document );\n\t\t// @if CK_DEBUG_ENGINE // initDocumentDumping( this.view.document );\n\n\t\t// @if CK_DEBUG_ENGINE // dumpTrees( this.model.document, this.model.document.version );\n\t\t// @if CK_DEBUG_ENGINE // dumpTrees( this.view.document, this.model.document.version );\n\n\t\t// @if CK_DEBUG_ENGINE // this.model.document.on( 'change', () => {\n\t\t// @if CK_DEBUG_ENGINE //\tdumpTrees( this.view.document, this.model.document.version );\n\t\t// @if CK_DEBUG_ENGINE // }, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Removes all event listeners attached to the `EditingController`. Destroys all objects created\n\t * by `EditingController` that need to be destroyed.\n\t */\n\tdestroy() {\n\t\tthis.view.destroy();\n\t\tthis.stopListening();\n\t}\n}\n\nmix( EditingController, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/plugincollection\n */\n\n/* globals console */\n\nimport CKEditorError, { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Manages a list of CKEditor plugins, including loading, resolving dependencies and initialization.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class PluginCollection {\n\t/**\n\t * Creates an instance of the PluginCollection class.\n\t * Allows loading and initializing plugins and their dependencies.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {Array.<Function>} [availablePlugins] Plugins (constructors) which the collection will be able to use\n\t * when {@link module:core/plugincollection~PluginCollection#init} is used with plugin names (strings, instead of constructors).\n\t * Usually, the editor will pass its built-in plugins to the collection so they can later be\n\t * used in `config.plugins` or `config.removePlugins` by names.\n\t */\n\tconstructor( editor, availablePlugins = [] ) {\n\t\t/**\n\t\t * @protected\n\t\t * @member {module:core/editor/editor~Editor} module:core/plugin~PluginCollection#_editor\n\t\t */\n\t\tthis._editor = editor;\n\n\t\t/**\n\t\t * Map of plugin constructors which can be retrieved by their names.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<String|Function,Function>} module:core/plugin~PluginCollection#_availablePlugins\n\t\t */\n\t\tthis._availablePlugins = new Map();\n\n\t\t/**\n\t\t * @protected\n\t\t * @member {Map} module:core/plugin~PluginCollection#_plugins\n\t\t */\n\t\tthis._plugins = new Map();\n\n\t\tfor ( const PluginConstructor of availablePlugins ) {\n\t\t\tthis._availablePlugins.set( PluginConstructor, PluginConstructor );\n\n\t\t\tif ( PluginConstructor.pluginName ) {\n\t\t\t\tthis._availablePlugins.set( PluginConstructor.pluginName, PluginConstructor );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Returns `[ PluginConstructor, pluginInstance ]` pairs.\n\t *\n\t * @returns {Iterable.<Array>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tfor ( const entry of this._plugins ) {\n\t\t\tif ( typeof entry[ 0 ] == 'function' ) {\n\t\t\t\tyield entry;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Gets the plugin instance by its constructor or name.\n\t *\n\t *\t\t// Check if 'Clipboard' plugin was loaded.\n\t *\t\tif ( editor.plugins.has( 'Clipboard' ) ) {\n\t *\t\t\t// Get clipboard plugin instance\n\t *\t\t\tconst clipboard = editor.plugins.get( 'Clipboard' );\n\t *\n\t *\t\t\tthis.listenTo( clipboard, 'inputTransformation', ( evt, data ) => {\n\t *\t\t\t\t// Do something on clipboard input.\n\t *\t\t\t} );\n\t *\t\t}\n\t *\n\t * **Note**: This method will throw error if plugin is not loaded. Use `{@link #has editor.plugins.has()}`\n\t * to check if plugin is available.\n\t *\n\t * @param {Function|String} key The plugin constructor or {@link module:core/plugin~PluginInterface.pluginName name}.\n\t * @returns {module:core/plugin~PluginInterface}\n\t */\n\tget( key ) {\n\t\tconst plugin = this._plugins.get( key );\n\n\t\tif ( !plugin ) {\n\t\t\t/**\n\t\t\t * The plugin is not loaded and could not be obtained.\n\t\t\t *\n\t\t\t * Plugin classes (constructors) need to be provided to the editor and must be loaded before they can be obtained from\n\t\t\t * the plugin collection.\n\t\t\t * This is usually done in CKEditor 5 builds by setting the {@link module:core/editor/editor~Editor.builtinPlugins}\n\t\t\t * property.\n\t\t\t *\n\t\t\t * **Note**: You can use `{@link module:core/plugincollection~PluginCollection#has editor.plugins.has()}`\n\t\t\t * to check if plugin was loaded.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-not-loaded\n\t\t\t * @param {String} plugin The name of the plugin which is not loaded.\n\t\t\t */\n\t\t\tconst errorMsg = 'plugincollection-plugin-not-loaded: The requested plugin is not loaded.';\n\n\t\t\tlet pluginName = key;\n\n\t\t\tif ( typeof key == 'function' ) {\n\t\t\t\tpluginName = key.pluginName || key.name;\n\t\t\t}\n\n\t\t\tthrow new CKEditorError( errorMsg, this._editor, { plugin: pluginName } );\n\t\t}\n\n\t\treturn plugin;\n\t}\n\n\t/**\n\t * Checks if plugin is loaded.\n\t *\n\t *\t\t// Check if 'Clipboard' plugin was loaded.\n\t *\t\tif ( editor.plugins.has( 'Clipboard' ) ) {\n\t *\t\t\t// Now use clipboard plugin instance:\n\t *\t\t\tconst clipboard = editor.plugins.get( 'Clipboard' );\n\t *\n\t *\t\t\t// ...\n\t *\t\t}\n\t *\n\t * @param {Function|String} key The plugin constructor or {@link module:core/plugin~PluginInterface.pluginName name}.\n\t * @returns {Boolean}\n\t */\n\thas( key ) {\n\t\treturn this._plugins.has( key );\n\t}\n\n\t/**\n\t * Initializes a set of plugins and adds them to the collection.\n\t *\n\t * @param {Array.<Function|String>} plugins An array of {@link module:core/plugin~PluginInterface plugin constructors}\n\t * or {@link module:core/plugin~PluginInterface.pluginName plugin names}. The second option (names) works only if\n\t * `availablePlugins` were passed to the {@link #constructor}.\n\t * @param {Array.<String|Function>} [removePlugins] Names of plugins or plugin constructors\n\t * that should not be loaded (despite being specified in the `plugins` array).\n\t * @returns {Promise.<module:core/plugin~LoadedPlugins>} A promise which gets resolved once all plugins are loaded\n\t * and available in the collection.\n\t */\n\tinit( plugins, removePlugins = [] ) {\n\t\tconst that = this;\n\t\tconst editor = this._editor;\n\t\tconst loading = new Set();\n\t\tconst loaded = [];\n\n\t\tconst pluginConstructors = mapToAvailableConstructors( plugins );\n\t\tconst removePluginConstructors = mapToAvailableConstructors( removePlugins );\n\t\tconst missingPlugins = getMissingPluginNames( plugins );\n\n\t\tif ( missingPlugins ) {\n\t\t\t/**\n\t\t\t * Some plugins are not available and could not be loaded.\n\t\t\t *\n\t\t\t * Plugin classes (constructors) need to be provided to the editor before they can be loaded by name.\n\t\t\t * This is usually done in CKEditor 5 builds by setting the {@link module:core/editor/editor~Editor.builtinPlugins}\n\t\t\t * property.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the {@glink builds/index CKEditor 5 Builds}**, it means\n\t\t\t * that you try to enable a plugin which was not included in that build. This may be due to a typo\n\t\t\t * in the plugin name or simply because that plugin is not a part of this build. In the latter scenario,\n\t\t\t * read more about {@glink builds/guides/development/custom-builds custom builds}.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the editor creators directly** (not a build), then it means\n\t\t\t * that you tried loading plugins by name. However, unlike CKEditor 4, CKEditor 5 does not implement a \"plugin loader\".\n\t\t\t * This means that CKEditor 5 does not know where to load the plugin modules from. Therefore, you need to\n\t\t\t * provide each plugin through reference (as a constructor function). Check out the examples in\n\t\t\t * {@glink builds/guides/integration/advanced-setup#scenario-2-building-from-source \"Building from source\"}.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-not-found\n\t\t\t * @param {Array.<String>} plugins The name of the plugins which could not be loaded.\n\t\t\t */\n\t\t\tconst errorMsg = 'plugincollection-plugin-not-found: Some plugins are not available and could not be loaded.';\n\n\t\t\t// Log the error so it's more visible on the console. Hopefully, for better DX.\n\t\t\tconsole.error( attachLinkToDocumentation( errorMsg ), { plugins: missingPlugins } );\n\n\t\t\treturn Promise.reject( new CKEditorError( errorMsg, this._editor, { plugins: missingPlugins } ) );\n\t\t}\n\n\t\treturn Promise.all( pluginConstructors.map( loadPlugin ) )\n\t\t\t.then( () => initPlugins( loaded, 'init' ) )\n\t\t\t.then( () => initPlugins( loaded, 'afterInit' ) )\n\t\t\t.then( () => loaded );\n\n\t\tfunction loadPlugin( PluginConstructor ) {\n\t\t\tif ( removePluginConstructors.includes( PluginConstructor ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The plugin is already loaded or being loaded - do nothing.\n\t\t\tif ( that._plugins.has( PluginConstructor ) || loading.has( PluginConstructor ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\treturn instantiatePlugin( PluginConstructor )\n\t\t\t\t.catch( err => {\n\t\t\t\t\t/**\n\t\t\t\t\t * It was not possible to load the plugin.\n\t\t\t\t\t *\n\t\t\t\t\t * This is a generic error logged to the console when a JavaSript error is thrown during the initialization\n\t\t\t\t\t * of one of the plugins.\n\t\t\t\t\t *\n\t\t\t\t\t * If you correctly handled the promise returned by the editor's `create()` method (like shown below)\n\t\t\t\t\t * you will find the original error logged to the console, too:\n\t\t\t\t\t *\n\t\t\t\t\t *\t\tClassicEditor.create( document.getElementById( 'editor' ) )\n\t\t\t\t\t *\t\t\t.then( editor => {\n\t\t\t\t\t *\t\t\t\t// ...\n\t\t\t\t\t * \t\t\t} )\n\t\t\t\t\t *\t\t\t.catch( error => {\n\t\t\t\t\t *\t\t\t\tconsole.error( error );\n\t\t\t\t\t *\t\t\t} );\n\t\t\t\t\t *\n\t\t\t\t\t * @error plugincollection-load\n\t\t\t\t\t * @param {String} plugin The name of the plugin that could not be loaded.\n\t\t\t\t\t */\n\t\t\t\t\tconsole.error( attachLinkToDocumentation(\n\t\t\t\t\t\t'plugincollection-load: It was not possible to load the plugin.'\n\t\t\t\t\t), { plugin: PluginConstructor } );\n\n\t\t\t\t\tthrow err;\n\t\t\t\t} );\n\t\t}\n\n\t\tfunction initPlugins( loadedPlugins, method ) {\n\t\t\treturn loadedPlugins.reduce( ( promise, plugin ) => {\n\t\t\t\tif ( !plugin[ method ] ) {\n\t\t\t\t\treturn promise;\n\t\t\t\t}\n\n\t\t\t\treturn promise.then( plugin[ method ].bind( plugin ) );\n\t\t\t}, Promise.resolve() );\n\t\t}\n\n\t\tfunction instantiatePlugin( PluginConstructor ) {\n\t\t\treturn new Promise( resolve => {\n\t\t\t\tloading.add( PluginConstructor );\n\n\t\t\t\tif ( PluginConstructor.requires ) {\n\t\t\t\t\tPluginConstructor.requires.forEach( RequiredPluginConstructorOrName => {\n\t\t\t\t\t\tconst RequiredPluginConstructor = getPluginConstructor( RequiredPluginConstructorOrName );\n\n\t\t\t\t\t\tif ( removePlugins.includes( RequiredPluginConstructor ) ) {\n\t\t\t\t\t\t\t/**\n\t\t\t\t\t\t\t * Cannot load a plugin because one of its dependencies is listed in the `removePlugins` option.\n\t\t\t\t\t\t\t *\n\t\t\t\t\t\t\t * @error plugincollection-required\n\t\t\t\t\t\t\t * @param {Function} plugin The required plugin.\n\t\t\t\t\t\t\t * @param {Function} requiredBy The parent plugin.\n\t\t\t\t\t\t\t */\n\t\t\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t\t\t'plugincollection-required: Cannot load a plugin because one of its dependencies is listed in' +\n\t\t\t\t\t\t\t\t'the `removePlugins` option.',\n\t\t\t\t\t\t\t\teditor,\n\t\t\t\t\t\t\t\t{ plugin: RequiredPluginConstructor, requiredBy: PluginConstructor }\n\t\t\t\t\t\t\t);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tloadPlugin( RequiredPluginConstructor );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t\tconst plugin = new PluginConstructor( editor );\n\t\t\t\tthat._add( PluginConstructor, plugin );\n\t\t\t\tloaded.push( plugin );\n\n\t\t\t\tresolve();\n\t\t\t} );\n\t\t}\n\n\t\tfunction getPluginConstructor( PluginConstructorOrName ) {\n\t\t\tif ( typeof PluginConstructorOrName == 'function' ) {\n\t\t\t\treturn PluginConstructorOrName;\n\t\t\t}\n\n\t\t\treturn that._availablePlugins.get( PluginConstructorOrName );\n\t\t}\n\n\t\tfunction getMissingPluginNames( plugins ) {\n\t\t\tconst missingPlugins = [];\n\n\t\t\tfor ( const pluginNameOrConstructor of plugins ) {\n\t\t\t\tif ( !getPluginConstructor( pluginNameOrConstructor ) ) {\n\t\t\t\t\tmissingPlugins.push( pluginNameOrConstructor );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn missingPlugins.length ? missingPlugins : null;\n\t\t}\n\n\t\tfunction mapToAvailableConstructors( plugins ) {\n\t\t\treturn plugins\n\t\t\t\t.map( pluginNameOrConstructor => getPluginConstructor( pluginNameOrConstructor ) )\n\t\t\t\t.filter( PluginConstructor => !!PluginConstructor );\n\t\t}\n\t}\n\n\t/**\n\t * Destroys all loaded plugins.\n\t *\n\t * @returns {Promise}\n\t */\n\tdestroy() {\n\t\tconst promises = Array.from( this )\n\t\t\t.map( ( [ , pluginInstance ] ) => pluginInstance )\n\t\t\t.filter( pluginInstance => typeof pluginInstance.destroy == 'function' )\n\t\t\t.map( pluginInstance => pluginInstance.destroy() );\n\n\t\treturn Promise.all( promises );\n\t}\n\n\t/**\n\t * Adds the plugin to the collection. Exposed mainly for testing purposes.\n\t *\n\t * @protected\n\t * @param {Function} PluginConstructor The plugin constructor.\n\t * @param {module:core/plugin~PluginInterface} plugin The instance of the plugin.\n\t */\n\t_add( PluginConstructor, plugin ) {\n\t\tthis._plugins.set( PluginConstructor, plugin );\n\n\t\tconst pluginName = PluginConstructor.pluginName;\n\n\t\tif ( !pluginName ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this._plugins.has( pluginName ) ) {\n\t\t\t/**\n\t\t\t * Two plugins with the same {@link module:core/plugin~PluginInterface.pluginName} were loaded.\n\t\t\t * This will lead to runtime conflicts between these plugins.\n\t\t\t *\n\t\t\t * In practice, this warning usually means that new plugins were added to an existing CKEditor 5 build.\n\t\t\t * Plugins should always be added to a source version of the editor (`@ckeditor/ckeditor5-editor-*`),\n\t\t\t * not to an editor imported from one of the `@ckeditor/ckeditor5-build-*` packages.\n\t\t\t *\n\t\t\t * Check your import paths and the list of plugins passed to\n\t\t\t * {@link module:core/editor/editor~Editor.create `Editor.create()`}\n\t\t\t * or specified in {@link module:core/editor/editor~Editor.builtinPlugins `Editor.builtinPlugins`}.\n\t\t\t *\n\t\t\t * The second option is that your `node_modules/` directory contains duplicated versions of the same\n\t\t\t * CKEditor 5 packages. Normally, on clean installations, npm deduplicates packages in `node_modules/`, so\n\t\t\t * it may be enough to call `rm -rf node_modules && npm i`. However, if you installed conflicting versions\n\t\t\t * of packages, their dependencies may need to be installed in more than one version which may lead to this\n\t\t\t * warning.\n\t\t\t *\n\t\t\t * Technically speaking, this error occurs because after adding a plugin to an existing editor build\n\t\t\t * dependencies of this plugin are being duplicated.\n\t\t\t * They are already built into that editor build and now get added for the second time as dependencies\n\t\t\t * of the plugin you are installing.\n\t\t\t *\n\t\t\t * Read more about {@glink builds/guides/integration/installing-plugins installing plugins}.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-name-conflict\n\t\t\t * @param {String} pluginName The duplicated plugin name.\n\t\t\t * @param {Function} plugin1 The first plugin constructor.\n\t\t\t * @param {Function} plugin2 The second plugin constructor.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'plugincollection-plugin-name-conflict: Two plugins with the same name were loaded.',\n\t\t\t\tnull,\n\t\t\t\t{ pluginName, plugin1: this._plugins.get( pluginName ).constructor, plugin2: PluginConstructor }\n\t\t\t);\n\t\t}\n\n\t\tthis._plugins.set( pluginName, plugin );\n\t}\n}\n\nmix( PluginCollection, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/commandcollection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Collection of commands. Its instance is available in {@link module:core/editor/editor~Editor#commands `editor.commands`}.\n */\nexport default class CommandCollection {\n\t/**\n\t * Creates collection instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Command map.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._commands = new Map();\n\t}\n\n\t/**\n\t * Registers a new command.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @param {module:core/command~Command} command\n\t */\n\tadd( commandName, command ) {\n\t\tthis._commands.set( commandName, command );\n\t}\n\n\t/**\n\t * Retrieves a command from the collection.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @returns {module:core/command~Command}\n\t */\n\tget( commandName ) {\n\t\treturn this._commands.get( commandName );\n\t}\n\n\t/**\n\t * Executes a command.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @param {*} [...commandParams] Command parameters.\n\t */\n\texecute( commandName, ...args ) {\n\t\tconst command = this.get( commandName );\n\n\t\tif ( !command ) {\n\t\t\t/**\n\t\t\t * Command does not exist.\n\t\t\t *\n\t\t\t * @error commandcollection-command-not-found\n\t\t\t * @param {String} commandName Name of the command.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'commandcollection-command-not-found: Command does not exist.', this, { commandName } );\n\t\t}\n\n\t\tcommand.execute( ...args );\n\t}\n\n\t/**\n\t * Returns iterator of command names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* names() {\n\t\tyield* this._commands.keys();\n\t}\n\n\t/**\n\t * Returns iterator of command instances.\n\t *\n\t * @returns {Iterable.<module:core/command~Command>}\n\t */\n\t* commands() {\n\t\tyield* this._commands.values();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Returns `[ commandName, commandInstance ]` pairs.\n\t *\n\t * @returns {Iterable.<Array>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._commands[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Destroys all collection commands.\n\t */\n\tdestroy() {\n\t\tfor ( const command of this.commands() ) {\n\t\t\tcommand.destroy();\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window */\n\n/**\n * @module utils/translation-service\n */\n\n/* istanbul ignore else */\nif ( !window.CKEDITOR_TRANSLATIONS ) {\n\twindow.CKEDITOR_TRANSLATIONS = {};\n}\n\n/**\n * Adds translations to existing ones.\n * These translations will later be available for the {@link module:utils/translation-service~translate `translate()`} function.\n *\n *\t\tadd( 'pl', {\n *\t\t\t'OK': 'OK',\n *\t\t\t'Cancel [context: reject]': 'Anuluj'\n *\t\t} );\n *\n * If you cannot import this function from this module (e.g. because you use a CKEditor 5 build), then you can\n * still add translations by extending the global `window.CKEDITOR_TRANSLATIONS` object by using a function like\n * the one below:\n *\n *\t\tfunction addTranslations( language, translations ) {\n *\t\t\tif ( !window.CKEDITOR_TRANSLATIONS ) {\n *\t\t\t\twindow.CKEDITOR_TRANSLATIONS = {};\n *\t\t\t}\n *\n *\t\t\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ] || ( window.CKEDITOR_TRANSLATIONS[ language ] = {} );\n *\n *\t\t\t// Extend the dictionary for the given language.\n *\t\t\tObject.assign( dictionary, translations );\n *\t\t}\n *\n * @param {String} language Target language.\n * @param {Object.<String, String>} translations Translations which will be added to the dictionary.\n */\nexport function add( language, translations ) {\n\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ] || ( window.CKEDITOR_TRANSLATIONS[ language ] = {} );\n\n\tObject.assign( dictionary, translations );\n}\n\n/**\n * Translates string if the translation of the string was previously added to the dictionary.\n * See {@link module:utils/translation-service Translation Service}.\n * This happens in a multi-language mode were translation modules are created by the bundler.\n *\n * When no translation is defined in the dictionary or the dictionary doesn't exist this function returns\n * the original string without the `'[context: ]'` (happens in development and single-language modes).\n *\n * In a single-language mode (when values passed to `t()` were replaced with target language strings) the dictionary\n * is left empty, so this function will return the original strings always.\n *\n *\t\ttranslate( 'pl', 'Cancel [context: reject]' );\n *\n * @param {String} language Target language.\n * @param {String} translationKey String that will be translated.\n * @returns {String} Translated sentence.\n */\nexport function translate( language, translationKey ) {\n\tconst numberOfLanguages = getNumberOfLanguages();\n\n\tif ( numberOfLanguages === 1 ) {\n\t\t// Override the language to the only supported one.\n\t\t// This can't be done in the `Locale` class, because the translations comes after the `Locale` class initialization.\n\t\tlanguage = Object.keys( window.CKEDITOR_TRANSLATIONS )[ 0 ];\n\t}\n\n\tif ( numberOfLanguages === 0 || !hasTranslation( language, translationKey ) ) {\n\t\treturn translationKey.replace( / \\[context: [^\\]]+\\]$/, '' );\n\t}\n\n\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ];\n\n\t// In case of missing translations we still need to cut off the `[context: ]` parts.\n\treturn dictionary[ translationKey ].replace( / \\[context: [^\\]]+\\]$/, '' );\n}\n\n/**\n * Clears dictionaries for test purposes.\n *\n * @protected\n */\nexport function _clear() {\n\twindow.CKEDITOR_TRANSLATIONS = {};\n}\n\n// Checks whether the dictionary exists and translation in that dictionary exists.\nfunction hasTranslation( language, translationKey ) {\n\treturn (\n\t\t( language in window.CKEDITOR_TRANSLATIONS ) &&\n\t\t( translationKey in window.CKEDITOR_TRANSLATIONS[ language ] )\n\t);\n}\n\nfunction getNumberOfLanguages() {\n\treturn Object.keys( window.CKEDITOR_TRANSLATIONS ).length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/locale\n */\n\n/* globals console */\n\nimport { translate } from './translation-service';\n\nconst RTL_LANGUAGE_CODES = [ 'ar', 'fa', 'he', 'ku', 'ug' ];\n\n/**\n * Represents the localization services.\n */\nexport default class Locale {\n\t/**\n\t * Creates a new instance of the Locale class. Learn more about\n\t * {@glink features/ui-language configuring language of the editor}.\n\t *\n\t * @param {Object} [options] Locale configuration.\n\t * @param {String} [options.uiLanguage='en'] The editor UI language code in the\n\t * [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format. See {@link #uiLanguage}.\n\t * @param {String} [options.contentLanguage] The editor content language code in the\n\t * [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format. If not specified, the same as `options.language`.\n\t * See {@link #contentLanguage}.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The editor UI language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t\t *\n\t\t * If the {@link #contentLanguage content language} was not specified in the `Locale` constructor,\n\t\t * it also defines the language of the content.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.uiLanguage = options.uiLanguage || 'en';\n\n\t\t/**\n\t\t * The editor content language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t\t *\n\t\t * Usually the same as {@link #uiLanguage editor language}, it can be customized by passing an optional\n\t\t * argument to the `Locale` constructor.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.contentLanguage = options.contentLanguage || this.uiLanguage;\n\n\t\t/**\n\t\t * Text direction of the {@link #uiLanguage editor UI language}. Either `'ltr'` or `'rtl'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.uiLanguageDirection = getLanguageDirection( this.uiLanguage );\n\n\t\t/**\n\t\t * Text direction of the {@link #contentLanguage editor content language}.\n\t\t *\n\t\t * If the content language was passed directly to the `Locale` constructor, this property represents the\n\t\t * direction of that language.\n\t\t *\n\t\t * If the {@link #contentLanguage editor content language} was derived from the {@link #uiLanguage editor language},\n\t\t * the content language direction is the same as the {@link #uiLanguageDirection UI language direction}.\n\t\t *\n\t\t * The value is either `'ltr'` or `'rtl'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.contentLanguageDirection = getLanguageDirection( this.contentLanguage );\n\n\t\t/**\n\t\t * Translates the given string to the {@link #uiLanguage}. This method is also available in\n\t\t * {@link module:core/editor/editor~Editor#t} and {@link module:ui/view~View#t}.\n\t\t *\n\t\t * The strings may contain placeholders (`%<index>`) for values which are passed as the second argument.\n\t\t * `<index>` is the index in the `values` array.\n\t\t *\n\t\t *\t\teditor.t( 'Created file \"%0\" in %1ms.', [ fileName, timeTaken ] );\n\t\t *\n\t\t * This method's context is statically bound to Locale instance,\n\t\t * so it can be called as a function:\n\t\t *\n\t\t *\t\tconst t = this.t;\n\t\t *\t\tt( 'Label' );\n\t\t *\n\t\t * @method #t\n\t\t * @param {String} str The string to translate.\n\t\t * @param {String[]} [values] Values that should be used to interpolate the string.\n\t\t */\n\t\tthis.t = ( ...args ) => this._t( ...args );\n\t}\n\n\t/**\n\t * The editor UI language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t *\n\t * **Note**: This property has been deprecated. Please use {@link #uiLanguage} and {@link #contentLanguage}\n\t * properties instead.\n\t *\n\t * @deprecated\n\t * @member {String}\n\t */\n\tget language() {\n\t\t/**\n\t\t * The {@link module:utils/locale~Locale#language `Locale#language`} property has been deprecated and will\n\t\t * be removed in the near future. Please use {@link #uiLanguage} and {@link #contentLanguage} properties instead.\n\t\t *\n\t\t * @error locale-deprecated-language-property\n\t\t */\n\t\tconsole.warn(\n\t\t\t'locale-deprecated-language-property: ' +\n\t\t\t'The Locale#language property has been deprecated and will be removed in the near future. ' +\n\t\t\t'Please use #uiLanguage and #contentLanguage properties instead.' );\n\n\t\treturn this.uiLanguage;\n\t}\n\n\t/**\n\t * Base for the {@link #t} method.\n\t *\n\t * @private\n\t */\n\t_t( str, values ) {\n\t\tlet translatedString = translate( this.uiLanguage, str );\n\n\t\tif ( values ) {\n\t\t\ttranslatedString = translatedString.replace( /%(\\d+)/g, ( match, index ) => {\n\t\t\t\treturn ( index < values.length ) ? values[ index ] : match;\n\t\t\t} );\n\t\t}\n\n\t\treturn translatedString;\n\t}\n}\n\n// Helps determine whether a language is LTR or RTL.\n//\n// @param {String} language The ISO 639-1 language code.\n// @returns {String} 'ltr' or 'rtl\nfunction getLanguageDirection( languageCode ) {\n\treturn RTL_LANGUAGE_CODES.includes( languageCode ) ? 'rtl' : 'ltr';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/viewconsumable\n */\n\nimport { isArray } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Class used for handling consumption of view {@link module:engine/view/element~Element elements},\n * {@link module:engine/view/text~Text text nodes} and {@link module:engine/view/documentfragment~DocumentFragment document fragments}.\n * Element's name and its parts (attributes, classes and styles) can be consumed separately. Consuming an element's name\n * does not consume its attributes, classes and styles.\n * To add items for consumption use {@link module:engine/conversion/viewconsumable~ViewConsumable#add add method}.\n * To test items use {@link module:engine/conversion/viewconsumable~ViewConsumable#test test method}.\n * To consume items use {@link module:engine/conversion/viewconsumable~ViewConsumable#consume consume method}.\n * To revert already consumed items use {@link module:engine/conversion/viewconsumable~ViewConsumable#revert revert method}.\n *\n *\t\tviewConsumable.add( element, { name: true } ); // Adds element's name as ready to be consumed.\n *\t\tviewConsumable.add( textNode ); // Adds text node for consumption.\n *\t\tviewConsumable.add( docFragment ); // Adds document fragment for consumption.\n *\t\tviewConsumable.test( element, { name: true } ); // Tests if element's name can be consumed.\n *\t\tviewConsumable.test( textNode ); // Tests if text node can be consumed.\n *\t\tviewConsumable.test( docFragment ); // Tests if document fragment can be consumed.\n *\t\tviewConsumable.consume( element, { name: true } ); // Consume element's name.\n *\t\tviewConsumable.consume( textNode ); // Consume text node.\n *\t\tviewConsumable.consume( docFragment ); // Consume document fragment.\n *\t\tviewConsumable.revert( element, { name: true } ); // Revert already consumed element's name.\n *\t\tviewConsumable.revert( textNode ); // Revert already consumed text node.\n *\t\tviewConsumable.revert( docFragment ); // Revert already consumed document fragment.\n */\nexport default class ViewConsumable {\n\t/**\n\t * Creates new ViewConsumable.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Map of consumable elements. If {@link module:engine/view/element~Element element} is used as a key,\n\t\t * {@link module:engine/conversion/viewconsumable~ViewElementConsumables ViewElementConsumables} instance is stored as value.\n\t\t * For {@link module:engine/view/text~Text text nodes} and\n\t\t * {@link module:engine/view/documentfragment~DocumentFragment document fragments} boolean value is stored as value.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<module:engine/conversion/viewconsumable~ViewElementConsumables|Boolean>}\n\t\t*/\n\t\tthis._consumables = new Map();\n\t}\n\n\t/**\n\t * Adds {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} as ready to be consumed.\n\t *\n\t *\t\tviewConsumable.add( p, { name: true } ); // Adds element's name to consume.\n\t *\t\tviewConsumable.add( p, { attributes: 'name' } ); // Adds element's attribute.\n\t *\t\tviewConsumable.add( p, { classes: 'foobar' } ); // Adds element's class.\n\t *\t\tviewConsumable.add( p, { styles: 'color' } ); // Adds element's style\n\t *\t\tviewConsumable.add( p, { attributes: 'name', styles: 'color' } ); // Adds attribute and style.\n\t *\t\tviewConsumable.add( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be provided.\n\t *\t\tviewConsumable.add( textNode ); // Adds text node to consume.\n\t *\t\tviewConsumable.add( docFragment ); // Adds document fragment to consume.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * attribute is provided - it should be handled separately by providing actual style/class.\n\t *\n\t *\t\tviewConsumable.add( p, { attributes: 'style' } ); // This call will throw an exception.\n\t *\t\tviewConsumable.add( p, { styles: 'color' } ); // This is properly handled style.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t */\n\tadd( element, consumables ) {\n\t\tlet elementConsumables;\n\n\t\t// For text nodes and document fragments just mark them as consumable.\n\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\tthis._consumables.set( element, true );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// For elements create new ViewElementConsumables or update already existing one.\n\t\tif ( !this._consumables.has( element ) ) {\n\t\t\telementConsumables = new ViewElementConsumables();\n\t\t\tthis._consumables.set( element, elementConsumables );\n\t\t} else {\n\t\t\telementConsumables = this._consumables.get( element );\n\t\t}\n\n\t\telementConsumables.add( consumables );\n\t}\n\n\t/**\n\t * Tests if {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} can be consumed.\n\t * It returns `true` when all items included in method's call can be consumed. Returns `false` when\n\t * first already consumed item is found and `null` when first non-consumable item is found.\n\t *\n\t *\t\tviewConsumable.test( p, { name: true } ); // Tests element's name.\n\t *\t\tviewConsumable.test( p, { attributes: 'name' } ); // Tests attribute.\n\t *\t\tviewConsumable.test( p, { classes: 'foobar' } ); // Tests class.\n\t *\t\tviewConsumable.test( p, { styles: 'color' } ); // Tests style.\n\t *\t\tviewConsumable.test( p, { attributes: 'name', styles: 'color' } ); // Tests attribute and style.\n\t *\t\tviewConsumable.test( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be tested.\n\t *\t\tviewConsumable.test( textNode ); // Tests text node.\n\t *\t\tviewConsumable.test( docFragment ); // Tests document fragment.\n\t *\n\t * Testing classes and styles as attribute will test if all added classes/styles can be consumed.\n\t *\n\t *\t\tviewConsumable.test( p, { attributes: 'class' } ); // Tests if all added classes can be consumed.\n\t *\t\tviewConsumable.test( p, { attributes: 'style' } ); // Tests if all added styles can be consumed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t * @returns {Boolean|null} Returns `true` when all items included in method's call can be consumed. Returns `false`\n\t * when first already consumed item is found and `null` when first non-consumable item is found.\n\t */\n\ttest( element, consumables ) {\n\t\tconst elementConsumables = this._consumables.get( element );\n\n\t\tif ( elementConsumables === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// For text nodes and document fragments return stored boolean value.\n\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\treturn elementConsumables;\n\t\t}\n\n\t\t// For elements test consumables object.\n\t\treturn elementConsumables.test( consumables );\n\t}\n\n\t/**\n\t * Consumes {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t * It returns `true` when all items included in method's call can be consumed, otherwise returns `false`.\n\t *\n\t *\t\tviewConsumable.consume( p, { name: true } ); // Consumes element's name.\n\t *\t\tviewConsumable.consume( p, { attributes: 'name' } ); // Consumes element's attribute.\n\t *\t\tviewConsumable.consume( p, { classes: 'foobar' } ); // Consumes element's class.\n\t *\t\tviewConsumable.consume( p, { styles: 'color' } ); // Consumes element's style.\n\t *\t\tviewConsumable.consume( p, { attributes: 'name', styles: 'color' } ); // Consumes attribute and style.\n\t *\t\tviewConsumable.consume( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be consumed.\n\t *\t\tviewConsumable.consume( textNode ); // Consumes text node.\n\t *\t\tviewConsumable.consume( docFragment ); // Consumes document fragment.\n\t *\n\t * Consuming classes and styles as attribute will test if all added classes/styles can be consumed.\n\t *\n\t *\t\tviewConsumable.consume( p, { attributes: 'class' } ); // Consume only if all added classes can be consumed.\n\t *\t\tviewConsumable.consume( p, { attributes: 'style' } ); // Consume only if all added styles can be consumed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t * @returns {Boolean} Returns `true` when all items included in method's call can be consumed,\n\t * otherwise returns `false`.\n\t */\n\tconsume( element, consumables ) {\n\t\tif ( this.test( element, consumables ) ) {\n\t\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\t\t// For text nodes and document fragments set value to false.\n\t\t\t\tthis._consumables.set( element, false );\n\t\t\t} else {\n\t\t\t\t// For elements - consume consumables object.\n\t\t\t\tthis._consumables.get( element ).consume( consumables );\n\t\t\t}\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Reverts {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} so they can be consumed once again.\n\t * Method does not revert items that were never previously added for consumption, even if they are included in\n\t * method's call.\n\t *\n\t *\t\tviewConsumable.revert( p, { name: true } ); // Reverts element's name.\n\t *\t\tviewConsumable.revert( p, { attributes: 'name' } ); // Reverts element's attribute.\n\t *\t\tviewConsumable.revert( p, { classes: 'foobar' } ); // Reverts element's class.\n\t *\t\tviewConsumable.revert( p, { styles: 'color' } ); // Reverts element's style.\n\t *\t\tviewConsumable.revert( p, { attributes: 'name', styles: 'color' } ); // Reverts attribute and style.\n\t *\t\tviewConsumable.revert( p, { classes: [ 'baz', 'bar' ] } ); // Multiple names can be reverted.\n\t *\t\tviewConsumable.revert( textNode ); // Reverts text node.\n\t *\t\tviewConsumable.revert( docFragment ); // Reverts document fragment.\n\t *\n\t * Reverting classes and styles as attribute will revert all classes/styles that were previously added for\n\t * consumption.\n\t *\n\t *\t\tviewConsumable.revert( p, { attributes: 'class' } ); // Reverts all classes added for consumption.\n\t *\t\tviewConsumable.revert( p, { attributes: 'style' } ); // Reverts all styles added for consumption.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t */\n\trevert( element, consumables ) {\n\t\tconst elementConsumables = this._consumables.get( element );\n\n\t\tif ( elementConsumables !== undefined ) {\n\t\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\t\t// For text nodes and document fragments - set consumable to true.\n\t\t\t\tthis._consumables.set( element, true );\n\t\t\t} else {\n\t\t\t\t// For elements - revert items from consumables object.\n\t\t\t\telementConsumables.revert( consumables );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates consumable object from {@link module:engine/view/element~Element view element}. Consumable object will include\n\t * element's name and all its attributes, classes and styles.\n\t *\n\t * @static\n\t * @param {module:engine/view/element~Element} element\n\t * @returns {Object} consumables\n\t */\n\tstatic consumablesFromElement( element ) {\n\t\tconst consumables = {\n\t\t\tname: true,\n\t\t\tattributes: [],\n\t\t\tclasses: [],\n\t\t\tstyles: []\n\t\t};\n\n\t\tconst attributes = element.getAttributeKeys();\n\n\t\tfor ( const attribute of attributes ) {\n\t\t\t// Skip classes and styles - will be added separately.\n\t\t\tif ( attribute == 'style' || attribute == 'class' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconsumables.attributes.push( attribute );\n\t\t}\n\n\t\tconst classes = element.getClassNames();\n\n\t\tfor ( const className of classes ) {\n\t\t\tconsumables.classes.push( className );\n\t\t}\n\n\t\tconst styles = element.getStyleNames();\n\n\t\tfor ( const style of styles ) {\n\t\t\tconsumables.styles.push( style );\n\t\t}\n\n\t\treturn consumables;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/viewconsumable~ViewConsumable ViewConsumable} instance from\n\t * {@link module:engine/view/node~Node node} or {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t * Instance will contain all elements, child nodes, attributes, styles and classes added for consumption.\n\t *\n\t * @static\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} from View node or document fragment\n\t * from which `ViewConsumable` will be created.\n\t * @param {module:engine/conversion/viewconsumable~ViewConsumable} [instance] If provided, given `ViewConsumable` instance will be used\n\t * to add all consumables. It will be returned instead of a new instance.\n\t */\n\tstatic createFrom( from, instance ) {\n\t\tif ( !instance ) {\n\t\t\tinstance = new ViewConsumable();\n\t\t}\n\n\t\tif ( from.is( 'text' ) ) {\n\t\t\tinstance.add( from );\n\n\t\t\treturn instance;\n\t\t}\n\n\t\t// Add `from` itself, if it is an element.\n\t\tif ( from.is( 'element' ) ) {\n\t\t\tinstance.add( from, ViewConsumable.consumablesFromElement( from ) );\n\t\t}\n\n\t\tif ( from.is( 'documentFragment' ) ) {\n\t\t\tinstance.add( from );\n\t\t}\n\n\t\tfor ( const child of from.getChildren() ) {\n\t\t\tinstance = ViewConsumable.createFrom( child, instance );\n\t\t}\n\n\t\treturn instance;\n\t}\n}\n\n/**\n * This is a private helper-class for {@link module:engine/conversion/viewconsumable~ViewConsumable}.\n * It represents and manipulates consumable parts of a single {@link module:engine/view/element~Element}.\n *\n * @private\n */\nclass ViewElementConsumables {\n\t/**\n\t * Creates ViewElementConsumables instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Flag indicating if name of the element can be consumed.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._canConsumeName = null;\n\n\t\t/**\n\t\t * Contains maps of element's consumables: attributes, classes and styles.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._consumables = {\n\t\t\tattributes: new Map(),\n\t\t\tstyles: new Map(),\n\t\t\tclasses: new Map()\n\t\t};\n\t}\n\n\t/**\n\t * Adds consumable parts of the {@link module:engine/view/element~Element view element}.\n\t * Element's name itself can be marked to be consumed (when element's name is consumed its attributes, classes and\n\t * styles still could be consumed):\n\t *\n\t *\t\tconsumables.add( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.add( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.add( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * attribute is provided - it should be handled separately by providing `style` and `class` in consumables object.\n\t *\n\t * @param {Object} consumables Object describing which parts of the element can be consumed.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be added as consumable.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to add as consumable.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to add as consumable.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to add as consumable.\n\t */\n\tadd( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = true;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._add( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Tests if parts of the {@link module:engine/view/node~Node view node} can be consumed.\n\t *\n\t * Element's name can be tested:\n\t *\n\t *\t\tconsumables.test( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.test( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.test( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be tested.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be tested.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to test.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to test.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to test.\n\t * @returns {Boolean|null} `true` when all tested items can be consumed, `null` when even one of the items\n\t * was never marked for consumption and `false` when even one of the items was already consumed.\n\t */\n\ttest( consumables ) {\n\t\t// Check if name can be consumed.\n\t\tif ( consumables.name && !this._canConsumeName ) {\n\t\t\treturn this._canConsumeName;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tconst value = this._test( type, consumables[ type ] );\n\n\t\t\t\tif ( value !== true ) {\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Return true only if all can be consumed.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Consumes parts of {@link module:engine/view/element~Element view element}. This function does not check if consumable item\n\t * is already consumed - it consumes all consumable items provided.\n\t * Element's name can be consumed:\n\t *\n\t *\t\tconsumables.consume( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.consume( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.consume( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be consumed.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be consumed.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to consume.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to consume.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to consume.\n\t */\n\tconsume( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = false;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._consume( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Revert already consumed parts of {@link module:engine/view/element~Element view Element}, so they can be consumed once again.\n\t * Element's name can be reverted:\n\t *\n\t *\t\tconsumables.revert( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.revert( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.revert( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be reverted.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be reverted.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to revert.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to revert.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to revert.\n\t */\n\trevert( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = true;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._revert( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that adds consumables of a given type: attribute, class or style.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * type is provided - it should be handled separately by providing actual style/class type.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_add( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\t/**\n\t\t\t\t * Class and style attributes should be handled separately in\n\t\t\t\t * {@link module:engine/conversion/viewconsumable~ViewConsumable#add `ViewConsumable#add()`}.\n\t\t\t\t *\n\t\t\t\t * What you have done is trying to use:\n\t\t\t\t *\n\t\t\t\t *\t\tconsumables.add( { attributes: [ 'class', 'style' ] } );\n\t\t\t\t *\n\t\t\t\t * While each class and style should be registered separately:\n\t\t\t\t *\n\t\t\t\t *\t\tconsumables.add( { classes: 'some-class', styles: 'font-weight' } );\n\t\t\t\t *\n\t\t\t\t * @error viewconsumable-invalid-attribute\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'viewconsumable-invalid-attribute: Classes and styles should be handled separately.', this );\n\t\t\t}\n\n\t\t\tconsumables.set( name, true );\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that tests consumables of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t * @returns {Boolean|null} Returns `true` if all items can be consumed, `null` when one of the items cannot be\n\t * consumed and `false` when one of the items is already consumed.\n\t */\n\t_test( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// Check all classes/styles if class/style attribute is tested.\n\t\t\t\tconst value = this._test( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\n\t\t\t\tif ( value !== true ) {\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst value = consumables.get( name );\n\t\t\t\t// Return null if attribute is not found.\n\t\t\t\tif ( value === undefined ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tif ( !value ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper method that consumes items of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_consume( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// If class or style is provided for consumption - consume them all.\n\t\t\t\tthis._consume( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\t\t\t} else {\n\t\t\t\tconsumables.set( name, false );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that reverts items of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or , `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_revert( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// If class or style is provided for reverting - revert them all.\n\t\t\t\tthis._revert( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\t\t\t} else {\n\t\t\t\tconst value = consumables.get( name );\n\n\t\t\t\tif ( value === false ) {\n\t\t\t\t\tconsumables.set( name, true );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/schema\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\nimport Range from './range';\nimport Position from './position';\nimport Element from './element';\nimport Text from './text';\nimport TreeWalker from './treewalker';\n\n/**\n * The model's schema. It defines allowed and disallowed structures of nodes as well as nodes' attributes.\n * The schema is usually defined by features and based on them the editing framework and features\n * make decisions how to change and process the model.\n *\n * The instance of schema is available in {@link module:engine/model/model~Model#schema `editor.model.schema`}.\n *\n * Read more about the schema in:\n *\n * * {@glink framework/guides/architecture/editing-engine#schema \"Schema\"} section of the\n * {@glink framework/guides/architecture/editing-engine Introduction to the \"Editing engine architecture\"}.\n * * {@glink framework/guides/deep-dive/schema \"Schema\" deep dive} guide.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Schema {\n\t/**\n\t * Creates schema instance.\n\t */\n\tconstructor() {\n\t\tthis._sourceDefinitions = {};\n\n\t\t/**\n\t\t * A dictionary containing attribute properties.\n\t\t *\n\t\t * @private\n\t\t * @member {Object.<String,String>}\n\t\t */\n\t\tthis._attributeProperties = {};\n\n\t\tthis.decorate( 'checkChild' );\n\t\tthis.decorate( 'checkAttribute' );\n\n\t\tthis.on( 'checkAttribute', ( evt, args ) => {\n\t\t\targs[ 0 ] = new SchemaContext( args[ 0 ] );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.on( 'checkChild', ( evt, args ) => {\n\t\t\targs[ 0 ] = new SchemaContext( args[ 0 ] );\n\t\t\targs[ 1 ] = this.getDefinition( args[ 1 ] );\n\t\t}, { priority: 'highest' } );\n\t}\n\n\t/**\n\t * Registers schema item. Can only be called once for every item name.\n\t *\n\t *\t\tschema.register( 'paragraph', {\n\t *\t\t\tinheritAllFrom: '$block'\n\t *\t\t} );\n\t *\n\t * @param {String} itemName\n\t * @param {module:engine/model/schema~SchemaItemDefinition} definition\n\t */\n\tregister( itemName, definition ) {\n\t\tif ( this._sourceDefinitions[ itemName ] ) {\n\t\t\t/**\n\t\t\t * A single item cannot be registered twice in the schema.\n\t\t\t *\n\t\t\t * This situation may happen when:\n\t\t\t *\n\t\t\t * * Two or more plugins called {@link #register `register()`} with the same name. This will usually mean that\n\t\t\t * there is a collision between plugins which try to use the same element in the model. Unfortunately,\n\t\t\t * the only way to solve this is by modifying one of these plugins to use a unique model element name.\n\t\t\t * * A single plugin was loaded twice. This happens when it is installed by npm/yarn in two versions\n\t\t\t * and usually means one or more of the following issues:\n\t\t\t * * a version mismatch (two of your dependencies require two different versions of this plugin),\n\t\t\t * * incorrect imports (this plugin is somehow imported twice in a way which confuses webpack),\n\t\t\t * * mess in `node_modules/` (`rm -rf node_modules/` may help).\n\t\t\t *\n\t\t\t * **Note:** Check the logged `itemName` to better understand which plugin was duplicated/conflicting.\n\t\t\t *\n\t\t\t * @param itemName The name of the model element that is being registered twice.\n\t\t\t * @error schema-cannot-register-item-twice\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'schema-cannot-register-item-twice: A single item cannot be registered twice in the schema.',\n\t\t\t\tthis,\n\t\t\t\t{\n\t\t\t\t\titemName\n\t\t\t\t}\n\t\t\t);\n\t\t}\n\n\t\tthis._sourceDefinitions[ itemName ] = [\n\t\t\tObject.assign( {}, definition )\n\t\t];\n\n\t\tthis._clearCache();\n\t}\n\n\t/**\n\t * Extends a {@link #register registered} item's definition.\n\t *\n\t * Extending properties such as `allowIn` will add more items to the existing properties,\n\t * while redefining properties such as `isBlock` will override the previously defined ones.\n\t *\n\t *\t\tschema.register( 'foo', {\n\t *\t\t\tallowIn: '$root',\n\t *\t\t\tisBlock: true;\n\t *\t\t} );\n\t *\t\tschema.extend( 'foo', {\n\t *\t\t\tallowIn: 'blockQuote',\n\t *\t\t\tisBlock: false\n\t *\t\t} );\n\t *\n\t *\t\tschema.getDefinition( 'foo' );\n\t *\t\t//\t{\n\t *\t\t//\t\tallowIn: [ '$root', 'blockQuote' ],\n\t *\t\t// \t\tisBlock: false\n\t *\t\t//\t}\n\t *\n\t * @param {String} itemName\n\t * @param {module:engine/model/schema~SchemaItemDefinition} definition\n\t */\n\textend( itemName, definition ) {\n\t\tif ( !this._sourceDefinitions[ itemName ] ) {\n\t\t\t/**\n\t\t\t * Cannot extend an item which was not registered yet.\n\t\t\t *\n\t\t\t * This error happens when a plugin tries to extend the schema definition of an item which was not\n\t\t\t * {@link #register registered} yet.\n\t\t\t *\n\t\t\t * @param itemName The name of the model element which is being extended.\n\t\t\t * @error schema-cannot-extend-missing-item\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'schema-cannot-extend-missing-item: Cannot extend an item which was not registered yet.', this, {\n\t\t\t\titemName\n\t\t\t} );\n\t\t}\n\n\t\tthis._sourceDefinitions[ itemName ].push( Object.assign( {}, definition ) );\n\n\t\tthis._clearCache();\n\t}\n\n\t/**\n\t * Returns all registered items.\n\t *\n\t * @returns {Object.<String,module:engine/model/schema~SchemaCompiledItemDefinition>}\n\t */\n\tgetDefinitions() {\n\t\tif ( !this._compiledDefinitions ) {\n\t\t\tthis._compile();\n\t\t}\n\n\t\treturn this._compiledDefinitions;\n\t}\n\n\t/**\n\t * Returns a definition of the given item or `undefined` if item is not registered.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t * @returns {module:engine/model/schema~SchemaCompiledItemDefinition}\n\t */\n\tgetDefinition( item ) {\n\t\tlet itemName;\n\n\t\tif ( typeof item == 'string' ) {\n\t\t\titemName = item;\n\t\t} else if ( item.is && ( item.is( 'text' ) || item.is( 'textProxy' ) ) ) {\n\t\t\titemName = '$text';\n\t\t}\n\t\t// Element or module:engine/model/schema~SchemaContextItem.\n\t\telse {\n\t\t\titemName = item.name;\n\t\t}\n\n\t\treturn this.getDefinitions()[ itemName ];\n\t}\n\n\t/**\n\t * Returns `true` if the given item is registered in the schema.\n\t *\n\t *\t\tschema.isRegistered( 'paragraph' ); // -> true\n\t *\t\tschema.isRegistered( editor.model.document.getRoot() ); // -> true\n\t *\t\tschema.isRegistered( 'foo' ); // -> false\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisRegistered( item ) {\n\t\treturn !!this.getDefinition( item );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * a block by {@link module:engine/model/schema~SchemaItemDefinition}'s `isBlock` property.\n\t *\n\t *\t\tschema.isBlock( 'paragraph' ); // -> true\n\t *\t\tschema.isBlock( '$root' ); // -> false\n\t *\n\t *\t\tconst paragraphElement = writer.createElement( 'paragraph' );\n\t *\t\tschema.isBlock( paragraphElement ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisBlock( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isBlock );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * a limit element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isLimit` or `isObject` property\n\t * (all objects are also limits).\n\t *\n\t *\t\tschema.isLimit( 'paragraph' ); // -> false\n\t *\t\tschema.isLimit( '$root' ); // -> true\n\t *\t\tschema.isLimit( editor.model.document.getRoot() ); // -> true\n\t *\t\tschema.isLimit( 'image' ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisLimit( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !!( def.isLimit || def.isObject );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * an object element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isObject` property.\n\t *\n\t *\t\tschema.isObject( 'paragraph' ); // -> false\n\t *\t\tschema.isObject( 'image' ); // -> true\n\t *\n\t *\t\tconst imageElement = writer.createElement( 'image' );\n\t *\t\tschema.isObject( imageElement ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisObject( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isObject );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * an inline element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isInline` property.\n\t *\n\t *\t\tschema.isInline( 'paragraph' ); // -> false\n\t *\t\tschema.isInline( 'softBreak' ); // -> true\n\t *\n\t *\t\tconst text = writer.createText('foo' );\n\t *\t\tschema.isInline( text ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisInline( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isInline );\n\t}\n\n\t/**\n\t * Checks whether the given node (`child`) can be a child of the given context.\n\t *\n\t *\t\tschema.checkChild( model.document.getRoot(), paragraph ); // -> false\n\t *\n\t *\t\tschema.register( 'paragraph', {\n\t *\t\t\tallowIn: '$root'\n\t *\t\t} );\n\t *\t\tschema.checkChild( model.document.getRoot(), paragraph ); // -> true\n\t *\n\t * Note: When verifying whether the given node can be a child of the given context, the\n\t * schema also verifies the entire context — from its root to its last element. Therefore, it is possible\n\t * for `checkChild()` to return `false` even though the context's last element can contain the checked child.\n\t * It happens if one of the context's elements does not allow its child.\n\t *\n\t * @fires checkChild\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context The context in which the child will be checked.\n\t * @param {module:engine/model/node~Node|String} def The child to check.\n\t */\n\tcheckChild( context, def ) {\n\t\t// Note: context and child are already normalized here to a SchemaContext and SchemaCompiledItemDefinition.\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this._checkContextMatch( def, context );\n\t}\n\n\t/**\n\t * Checks whether the given attribute can be applied in the given context (on the last\n\t * item of the context).\n\t *\n\t *\t\tschema.checkAttribute( textNode, 'bold' ); // -> false\n\t *\n\t *\t\tschema.extend( '$text', {\n\t *\t\t\tallowAttributes: 'bold'\n\t *\t\t} );\n\t *\t\tschema.checkAttribute( textNode, 'bold' ); // -> true\n\t *\n\t * @fires checkAttribute\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context The context in which the attribute will be checked.\n\t * @param {String} attributeName\n\t */\n\tcheckAttribute( context, attributeName ) {\n\t\tconst def = this.getDefinition( context.last );\n\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn def.allowAttributes.includes( attributeName );\n\t}\n\n\t/**\n\t * Checks whether the given element (`elementToMerge`) can be merged with the specified base element (`positionOrBaseElement`).\n\t *\n\t * In other words — whether `elementToMerge`'s children {@link #checkChild are allowed} in the `positionOrBaseElement`.\n\t *\n\t * This check ensures that elements merged with {@link module:engine/model/writer~Writer#merge `Writer#merge()`}\n\t * will be valid.\n\t *\n\t * Instead of elements, you can pass the instance of the {@link module:engine/model/position~Position} class as the\n\t * `positionOrBaseElement`. It means that the elements before and after the position will be checked whether they can be merged.\n\t *\n\t * @param {module:engine/model/position~Position|module:engine/model/element~Element} positionOrBaseElement The position or base\n\t * element to which the `elementToMerge` will be merged.\n\t * @param {module:engine/model/element~Element} elementToMerge The element to merge. Required if `positionOrBaseElement` is an element.\n\t * @returns {Boolean}\n\t */\n\tcheckMerge( positionOrBaseElement, elementToMerge = null ) {\n\t\tif ( positionOrBaseElement instanceof Position ) {\n\t\t\tconst nodeBefore = positionOrBaseElement.nodeBefore;\n\t\t\tconst nodeAfter = positionOrBaseElement.nodeAfter;\n\n\t\t\tif ( !( nodeBefore instanceof Element ) ) {\n\t\t\t\t/**\n\t\t\t\t * The node before the merge position must be an element.\n\t\t\t\t *\n\t\t\t\t * @error schema-check-merge-no-element-before\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'schema-check-merge-no-element-before: The node before the merge position must be an element.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( !( nodeAfter instanceof Element ) ) {\n\t\t\t\t/**\n\t\t\t\t * The node after the merge position must be an element.\n\t\t\t\t *\n\t\t\t\t * @error schema-check-merge-no-element-after\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'schema-check-merge-no-element-after: The node after the merge position must be an element.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn this.checkMerge( nodeBefore, nodeAfter );\n\t\t}\n\n\t\tfor ( const child of elementToMerge.getChildren() ) {\n\t\t\tif ( !this.checkChild( positionOrBaseElement, child ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Allows registering a callback to the {@link #checkChild} method calls.\n\t *\n\t * Callbacks allow you to implement rules which are not otherwise possible to achieve\n\t * by using the declarative API of {@link module:engine/model/schema~SchemaItemDefinition}.\n\t * For example, by using this method you can disallow elements in specific contexts.\n\t *\n\t * This method is a shorthand for using the {@link #event:checkChild} event. For even better control,\n\t * you can use that event instead.\n\t *\n\t * Example:\n\t *\n\t *\t\t// Disallow heading1 directly inside a blockQuote.\n\t *\t\tschema.addChildCheck( ( context, childDefinition ) => {\n\t *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition.name == 'heading1' ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Which translates to:\n\t *\n\t *\t\tschema.on( 'checkChild', ( evt, args ) => {\n\t *\t\t\tconst context = args[ 0 ];\n\t *\t\t\tconst childDefinition = args[ 1 ];\n\t *\n\t *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition && childDefinition.name == 'heading1' ) {\n\t *\t\t\t\t// Prevent next listeners from being called.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t\t// Set the checkChild()'s return value.\n\t *\t\t\t\tevt.return = false;\n\t *\t\t\t}\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t * @param {Function} callback The callback to be called. It is called with two parameters:\n\t * {@link module:engine/model/schema~SchemaContext} (context) instance and\n\t * {@link module:engine/model/schema~SchemaCompiledItemDefinition} (child-to-check definition).\n\t * The callback may return `true/false` to override `checkChild()`'s return value. If it does not return\n\t * a boolean value, the default algorithm (or other callbacks) will define `checkChild()`'s return value.\n\t */\n\taddChildCheck( callback ) {\n\t\tthis.on( 'checkChild', ( evt, [ ctx, childDef ] ) => {\n\t\t\t// checkChild() was called with a non-registered child.\n\t\t\t// In 99% cases such check should return false, so not to overcomplicate all callbacks\n\t\t\t// don't even execute them.\n\t\t\tif ( !childDef ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst retValue = callback( ctx, childDef );\n\n\t\t\tif ( typeof retValue == 'boolean' ) {\n\t\t\t\tevt.stop();\n\t\t\t\tevt.return = retValue;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Allows registering a callback to the {@link #checkAttribute} method calls.\n\t *\n\t * Callbacks allow you to implement rules which are not otherwise possible to achieve\n\t * by using the declarative API of {@link module:engine/model/schema~SchemaItemDefinition}.\n\t * For example, by using this method you can disallow attribute if node to which it is applied\n\t * is contained within some other element (e.g. you want to disallow `bold` on `$text` within `heading1`).\n\t *\n\t * This method is a shorthand for using the {@link #event:checkAttribute} event. For even better control,\n\t * you can use that event instead.\n\t *\n\t * Example:\n\t *\n\t *\t\t// Disallow bold on $text inside heading1.\n\t *\t\tschema.addAttributeCheck( ( context, attributeName ) => {\n\t *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Which translates to:\n\t *\n\t *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n\t *\t\t\tconst context = args[ 0 ];\n\t *\t\t\tconst attributeName = args[ 1 ];\n\t *\n\t *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n\t *\t\t\t\t// Prevent next listeners from being called.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t\t// Set the checkAttribute()'s return value.\n\t *\t\t\t\tevt.return = false;\n\t *\t\t\t}\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t * @param {Function} callback The callback to be called. It is called with two parameters:\n\t * {@link module:engine/model/schema~SchemaContext} (context) instance and attribute name.\n\t * The callback may return `true/false` to override `checkAttribute()`'s return value. If it does not return\n\t * a boolean value, the default algorithm (or other callbacks) will define `checkAttribute()`'s return value.\n\t */\n\taddAttributeCheck( callback ) {\n\t\tthis.on( 'checkAttribute', ( evt, [ ctx, attributeName ] ) => {\n\t\t\tconst retValue = callback( ctx, attributeName );\n\n\t\t\tif ( typeof retValue == 'boolean' ) {\n\t\t\t\tevt.stop();\n\t\t\t\tevt.return = retValue;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * This method allows assigning additional metadata to the model attributes. For example,\n\t * {@link module:engine/model/schema~AttributeProperties `AttributeProperties#isFormatting` property} is\n\t * used to mark formatting attributes (like `bold` or `italic`).\n\t *\n\t *\t\t// Mark bold as a formatting attribute.\n\t *\t\tschema.setAttributeProperties( 'bold', {\n\t *\t\t\tisFormatting: true\n\t *\t\t} );\n\t *\n\t *\t\t// Override code not to be considered a formatting markup.\n\t *\t\tschema.setAttributeProperties( 'code', {\n\t *\t\t\tisFormatting: false\n\t *\t\t} );\n\t *\n\t * Properties are not limited to members defined in the\n\t * {@link module:engine/model/schema~AttributeProperties `AttributeProperties` type} and you can also use custom properties:\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\tcustomProperty: 'value'\n\t *\t\t} );\n\t *\n\t * Subsequent calls with the same attribute will extend its custom properties:\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\tone: 1\n\t *\t\t} );\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\ttwo: 2\n\t *\t\t} );\n\t *\n\t *\t\tconsole.log( schema.getAttributeProperties( 'blockQuote' ) );\n\t *\t\t// Logs: { one: 1, two: 2 }\n\t *\n\t * @param {String} attributeName A name of the attribute to receive the properties.\n\t * @param {module:engine/model/schema~AttributeProperties} properties A dictionary of properties.\n\t */\n\tsetAttributeProperties( attributeName, properties ) {\n\t\tthis._attributeProperties[ attributeName ] = Object.assign( this.getAttributeProperties( attributeName ), properties );\n\t}\n\n\t/**\n\t * Returns properties associated with a given model attribute. See {@link #setAttributeProperties `setAttributeProperties()`}.\n\t *\n\t * @param {String} attributeName A name of the attribute.\n\t * @returns {module:engine/model/schema~AttributeProperties}\n\t */\n\tgetAttributeProperties( attributeName ) {\n\t\treturn this._attributeProperties[ attributeName ] || {};\n\t}\n\n\t/**\n\t * Returns the lowest {@link module:engine/model/schema~Schema#isLimit limit element} containing the entire\n\t * selection/range/position or the root otherwise.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection|\n\t * module:engine/model/range~Range|module:engine/model/position~Position} selectionOrRangeOrPosition\n\t * The selection/range/position to check.\n\t * @returns {module:engine/model/element~Element} The lowest limit element containing\n\t * the entire `selectionOrRangeOrPosition`.\n\t */\n\tgetLimitElement( selectionOrRangeOrPosition ) {\n\t\tlet element;\n\n\t\tif ( selectionOrRangeOrPosition instanceof Position ) {\n\t\t\telement = selectionOrRangeOrPosition.parent;\n\t\t} else {\n\t\t\tconst ranges = selectionOrRangeOrPosition instanceof Range ?\n\t\t\t\t[ selectionOrRangeOrPosition ] :\n\t\t\t\tArray.from( selectionOrRangeOrPosition.getRanges() );\n\n\t\t\t// Find the common ancestor for all selection's ranges.\n\t\t\telement = ranges\n\t\t\t\t.reduce( ( element, range ) => {\n\t\t\t\t\tconst rangeCommonAncestor = range.getCommonAncestor();\n\n\t\t\t\t\tif ( !element ) {\n\t\t\t\t\t\treturn rangeCommonAncestor;\n\t\t\t\t\t}\n\n\t\t\t\t\treturn element.getCommonAncestor( rangeCommonAncestor, { includeSelf: true } );\n\t\t\t\t}, null );\n\t\t}\n\n\t\twhile ( !this.isLimit( element ) ) {\n\t\t\tif ( element.parent ) {\n\t\t\t\telement = element.parent;\n\t\t\t} else {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\treturn element;\n\t}\n\n\t/**\n\t * Checks whether the attribute is allowed in selection:\n\t *\n\t * * if the selection is not collapsed, then checks if the attribute is allowed on any of nodes in that range,\n\t * * if the selection is collapsed, then checks if on the selection position there's a text with the\n\t * specified attribute allowed.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * Selection which will be checked.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Boolean}\n\t */\n\tcheckAttributeInSelection( selection, attribute ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\t\t\tconst context = [\n\t\t\t\t...firstPosition.getAncestors(),\n\t\t\t\tnew Text( '', selection.getAttributes() )\n\t\t\t];\n\n\t\t\t// Check whether schema allows for a text with the attribute in the selection.\n\t\t\treturn this.checkAttribute( context, attribute );\n\t\t} else {\n\t\t\tconst ranges = selection.getRanges();\n\n\t\t\t// For all ranges, check nodes in them until you find a node that is allowed to have the attribute.\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tfor ( const value of range ) {\n\t\t\t\t\tif ( this.checkAttribute( value.item, attribute ) ) {\n\t\t\t\t\t\t// If we found a node that is allowed to have the attribute, return true.\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// If we haven't found such node, return false.\n\t\treturn false;\n\t}\n\n\t/**\n\t * Transforms the given set of ranges into a set of ranges where the given attribute is allowed (and can be applied).\n\t *\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to be validated.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Iterable.<module:engine/model/range~Range>} Ranges in which the attribute is allowed.\n\t */\n\t* getValidRanges( ranges, attribute ) {\n\t\tranges = convertToMinimalFlatRanges( ranges );\n\n\t\tfor ( const range of ranges ) {\n\t\t\tyield* this._getValidRangesForRange( range, attribute );\n\t\t}\n\t}\n\n\t/**\n\t * Basing on given `position`, finds and returns a {@link module:engine/model/range~Range range} which is\n\t * nearest to that `position` and is a correct range for selection.\n\t *\n\t * The correct selection range might be collapsed when it is located in a position where the text node can be placed.\n\t * Non-collapsed range is returned when selection can be placed around element marked as an \"object\" in\n\t * the {@link module:engine/model/schema~Schema schema}.\n\t *\n\t * Direction of searching for the nearest correct selection range can be specified as:\n\t *\n\t * * `both` - searching will be performed in both ways,\n\t * * `forward` - searching will be performed only forward,\n\t * * `backward` - searching will be performed only backward.\n\t *\n\t * When valid selection range cannot be found, `null` is returned.\n\t *\n\t * @param {module:engine/model/position~Position} position Reference position where new selection range should be looked for.\n\t * @param {'both'|'forward'|'backward'} [direction='both'] Search direction.\n\t * @returns {module:engine/model/range~Range|null} Nearest selection range or `null` if one cannot be found.\n\t */\n\tgetNearestSelectionRange( position, direction = 'both' ) {\n\t\t// Return collapsed range if provided position is valid.\n\t\tif ( this.checkChild( position, '$text' ) ) {\n\t\t\treturn new Range( position );\n\t\t}\n\n\t\tlet backwardWalker, forwardWalker;\n\n\t\tif ( direction == 'both' || direction == 'backward' ) {\n\t\t\tbackwardWalker = new TreeWalker( { startPosition: position, direction: 'backward' } );\n\t\t}\n\n\t\tif ( direction == 'both' || direction == 'forward' ) {\n\t\t\tforwardWalker = new TreeWalker( { startPosition: position } );\n\t\t}\n\n\t\tfor ( const data of combineWalkers( backwardWalker, forwardWalker ) ) {\n\t\t\tconst type = ( data.walker == backwardWalker ? 'elementEnd' : 'elementStart' );\n\t\t\tconst value = data.value;\n\n\t\t\tif ( value.type == type && this.isObject( value.item ) ) {\n\t\t\t\treturn Range._createOn( value.item );\n\t\t\t}\n\n\t\t\tif ( this.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\t\treturn new Range( value.nextPosition );\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Tries to find position ancestors that allows to insert given node.\n\t * It starts searching from the given position and goes node by node to the top of the model tree\n\t * as long as {@link module:engine/model/schema~Schema#isLimit limit element},\n\t * {@link module:engine/model/schema~Schema#isObject object element} or top-most ancestor won't be reached.\n\t *\n\t * @params {module:engine/model/position~Position} position Position from searching will start.\n\t * @params {module:engine/model/node~Node|String} node Node for which allowed parent should be found or its name.\n\t * @returns {module:engine/model/element~Element|null} element Allowed parent or null if nothing was found.\n\t */\n\tfindAllowedParent( position, node ) {\n\t\tlet parent = position.parent;\n\n\t\twhile ( parent ) {\n\t\t\tif ( this.checkChild( parent, node ) ) {\n\t\t\t\treturn parent;\n\t\t\t}\n\n\t\t\t// Do not split limit elements.\n\t\t\tif ( this.isLimit( parent ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Removes attributes disallowed by the schema.\n\t *\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes that will be filtered.\n\t * @param {module:engine/model/writer~Writer} writer\n\t */\n\tremoveDisallowedAttributes( nodes, writer ) {\n\t\tfor ( const node of nodes ) {\n\t\t\t// When node is a `Text` it has no children, so just filter it out.\n\t\t\tif ( node.is( 'text' ) ) {\n\t\t\t\tremoveDisallowedAttributeFromNode( this, node, writer );\n\t\t\t}\n\t\t\t// In a case of `Element` iterates through positions between nodes inside this element\n\t\t\t// and filter out node before the current position, or position parent when position\n\t\t\t// is at start of an element. Using positions prevent from omitting merged nodes\n\t\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/1789.\n\t\t\telse {\n\t\t\t\tconst rangeInNode = Range._createIn( node );\n\t\t\t\tconst positionsInRange = rangeInNode.getPositions();\n\n\t\t\t\tfor ( const position of positionsInRange ) {\n\t\t\t\t\tconst item = position.nodeBefore || position.parent;\n\n\t\t\t\t\tremoveDisallowedAttributeFromNode( this, item, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates an instance of the schema context.\n\t *\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context\n\t * @returns {module:engine/model/schema~SchemaContext}\n\t */\n\tcreateContext( context ) {\n\t\treturn new SchemaContext( context );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_clearCache() {\n\t\tthis._compiledDefinitions = null;\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_compile() {\n\t\tconst compiledDefinitions = {};\n\t\tconst sourceRules = this._sourceDefinitions;\n\t\tconst itemNames = Object.keys( sourceRules );\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompiledDefinitions[ itemName ] = compileBaseItemRule( sourceRules[ itemName ], itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowContentOf( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowWhere( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowAttributesOf( compiledDefinitions, itemName );\n\t\t\tcompileInheritPropertiesFrom( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcleanUpAllowIn( compiledDefinitions, itemName );\n\t\t\tcleanUpAllowAttributes( compiledDefinitions, itemName );\n\t\t}\n\n\t\tthis._compiledDefinitions = compiledDefinitions;\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/schema~SchemaCompiledItemDefinition} def\n\t * @param {module:engine/model/schema~SchemaContext} context\n\t * @param {Number} contextItemIndex\n\t */\n\t_checkContextMatch( def, context, contextItemIndex = context.length - 1 ) {\n\t\tconst contextItem = context.getItem( contextItemIndex );\n\n\t\tif ( def.allowIn.includes( contextItem.name ) ) {\n\t\t\tif ( contextItemIndex == 0 ) {\n\t\t\t\treturn true;\n\t\t\t} else {\n\t\t\t\tconst parentRule = this.getDefinition( contextItem );\n\n\t\t\t\treturn this._checkContextMatch( parentRule, context, contextItemIndex - 1 );\n\t\t\t}\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Takes a flat range and an attribute name. Traverses the range recursively and deeply to find and return all ranges\n\t * inside the given range on which the attribute can be applied.\n\t *\n\t * This is a helper function for {@link ~Schema#getValidRanges}.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Range to process.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Iterable.<module:engine/model/range~Range>} Ranges in which the attribute is allowed.\n\t */\n\t* _getValidRangesForRange( range, attribute ) {\n\t\tlet start = range.start;\n\t\tlet end = range.start;\n\n\t\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'element' ) ) {\n\t\t\t\tyield* this._getValidRangesForRange( Range._createIn( item ), attribute );\n\t\t\t}\n\n\t\t\tif ( !this.checkAttribute( item, attribute ) ) {\n\t\t\t\tif ( !start.isEqual( end ) ) {\n\t\t\t\t\tyield new Range( start, end );\n\t\t\t\t}\n\n\t\t\t\tstart = Position._createAfter( item );\n\t\t\t}\n\n\t\t\tend = Position._createAfter( item );\n\t\t}\n\n\t\tif ( !start.isEqual( end ) ) {\n\t\t\tyield new Range( start, end );\n\t\t}\n\t}\n}\n\nmix( Schema, ObservableMixin );\n\n/**\n * Event fired when the {@link #checkChild} method is called. It allows plugging in\n * additional behavior – e.g. implementing rules which cannot be defined using the declarative\n * {@link module:engine/model/schema~SchemaItemDefinition} interface.\n *\n * **Note:** The {@link #addChildCheck} method is a more handy way to register callbacks. Internally,\n * it registers a listener to this event but comes with a simpler API and it is the recommended choice\n * in most of the cases.\n *\n * The {@link #checkChild} method fires an event because it is\n * {@link module:utils/observablemixin~ObservableMixin#decorate decorated} with it. Thanks to that you can\n * use this event in a various way, but the most important use case is overriding standard behaviour of the\n * `checkChild()` method. Let's see a typical listener template:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\t\t}, { priority: 'high' } );\n *\n * The listener is added with a `high` priority to be executed before the default method is really called. The `args` callback\n * parameter contains arguments passed to `checkChild( context, child )`. However, the `context` parameter is already\n * normalized to a {@link module:engine/model/schema~SchemaContext} instance and `child` to a\n * {@link module:engine/model/schema~SchemaCompiledItemDefinition} instance, so you don't have to worry about\n * the various ways how `context` and `child` may be passed to `checkChild()`.\n *\n * **Note:** `childDefinition` may be `undefined` if `checkChild()` was called with a non-registered element.\n *\n * So, in order to implement a rule \"disallow `heading1` in `blockQuote`\" you can add such a listener:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition && childDefinition.name == 'heading1' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkChild()'s return value.\n *\t\t\t\tevt.return = false;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * Allowing elements in specific contexts will be a far less common use case, because it's normally handled by\n * `allowIn` rule from {@link module:engine/model/schema~SchemaItemDefinition} but if you have a complex scenario\n * where `listItem` should be allowed only in element `foo` which must be in element `bar`, then this would be the way:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'bar foo' ) && childDefinition.name == 'listItem' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkChild()'s return value.\n *\t\t\t\tevt.return = true;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * @event checkChild\n * @param {Array} args The `checkChild()`'s arguments.\n */\n\n/**\n * Event fired when the {@link #checkAttribute} method is called. It allows plugging in\n * additional behavior – e.g. implementing rules which cannot be defined using the declarative\n * {@link module:engine/model/schema~SchemaItemDefinition} interface.\n *\n * **Note:** The {@link #addAttributeCheck} method is a more handy way to register callbacks. Internally,\n * it registers a listener to this event but comes with a simpler API and it is the recommended choice\n * in most of the cases.\n *\n * The {@link #checkAttribute} method fires an event because it's\n * {@link module:utils/observablemixin~ObservableMixin#decorate decorated} with it. Thanks to that you can\n * use this event in a various way, but the most important use case is overriding standard behaviour of the\n * `checkAttribute()` method. Let's see a typical listener template:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst attributeName = args[ 1 ];\n *\t\t}, { priority: 'high' } );\n *\n * The listener is added with a `high` priority to be executed before the default method is really called. The `args` callback\n * parameter contains arguments passed to `checkAttribute( context, attributeName )`. However, the `context` parameter is already\n * normalized to a {@link module:engine/model/schema~SchemaContext} instance, so you don't have to worry about\n * the various ways how `context` may be passed to `checkAttribute()`.\n *\n * So, in order to implement a rule \"disallow `bold` in a text which is in a `heading1` you can add such a listener:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst atributeName = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkAttribute()'s return value.\n *\t\t\t\tevt.return = false;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * Allowing attributes in specific contexts will be a far less common use case, because it's normally handled by\n * `allowAttributes` rule from {@link module:engine/model/schema~SchemaItemDefinition} but if you have a complex scenario\n * where `bold` should be allowed only in element `foo` which must be in element `bar`, then this would be the way:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst atributeName = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'bar foo $text' ) && attributeName == 'bold' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkAttribute()'s return value.\n *\t\t\t\tevt.return = true;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * @event checkAttribute\n * @param {Array} args The `checkAttribute()`'s arguments.\n */\n\n/**\n * A definition of a {@link module:engine/model/schema~Schema schema} item.\n *\n * You can define the following rules:\n *\n * * `allowIn` – A string or an array of strings. Defines in which other items this item will be allowed.\n * * `allowAttributes` – A string or an array of strings. Defines allowed attributes of the given item.\n * * `allowContentOf` – A string or an array of strings. Inherits \"allowed children\" from other items.\n * * `allowWhere` – A string or an array of strings. Inherits \"allowed in\" from other items.\n * * `allowAttributesOf` – A string or an array of strings. Inherits attributes from other items.\n * * `inheritTypesFrom` – A string or an array of strings. Inherits `is*` properties of other items.\n * * `inheritAllFrom` – A string. A shorthand for `allowContentOf`, `allowWhere`, `allowAttributesOf`, `inheritTypesFrom`.\n * * Additionally, you can define the following `is*` properties: `isBlock`, `isLimit`, `isObject`, `isInline`. Read about them below.\n *\n * # The is* properties\n *\n * There are 3 commonly used `is*` properties. Their role is to assign additional semantics to schema items.\n * You can define more properties but you will also need to implement support for them in the existing editor features.\n *\n * * `isBlock` – Whether this item is paragraph-like. Generally speaking, content is usually made out of blocks\n * like paragraphs, list items, images, headings, etc. All these elements are marked as blocks. A block\n * should not allow another block inside. Note: There is also the `$block` generic item which has `isBlock` set to `true`.\n * Most block type items will inherit from `$block` (through `inheritAllFrom`).\n * * `isLimit` – It can be understood as whether this element should not be split by <kbd>Enter</kbd>.\n * Examples of limit elements: `$root`, table cell, image caption, etc. In other words, all actions that happen inside\n * a limit element are limited to its content. **Note:** All objects (`isObject`) are treated as limit elements, too.\n * * `isObject` – Whether an item is \"self-contained\" and should be treated as a whole. Examples of object elements:\n * `image`, `table`, `video`, etc. **Note:** An object is also a limit, so\n * {@link module:engine/model/schema~Schema#isLimit `isLimit()`} returns `true` for object elements automatically.\n * * `isInline` – Whether an item is \"text-like\" and should be treated as an inline node. Examples of inline elements:\n * `$text`, `softBreak` (`<br>`), etc.\n *\n * # Generic items\n *\n * There are three basic generic items: `$root`, `$block` and `$text`.\n * They are defined as follows:\n *\n *\t\tthis.schema.register( '$root', {\n *\t\t\tisLimit: true\n *\t\t} );\n *\t\tthis.schema.register( '$block', {\n *\t\t\tallowIn: '$root',\n *\t\t\tisBlock: true\n *\t\t} );\n *\t\tthis.schema.register( '$text', {\n *\t\t\tallowIn: '$block',\n *\t\t\tisInline: true\n *\t\t} );\n *\n * They reflect typical editor content that is contained within one root, consists of several blocks\n * (paragraphs, lists items, headings, images) which, in turn, may contain text inside.\n *\n * By inheriting from the generic items you can define new items which will get extended by other editor features.\n * Read more about generic types in the {@glink framework/guides/deep-dive/schema Defining schema} guide.\n *\n * # Example definitions\n *\n * Allow `paragraph` in roots and block quotes:\n *\n *\t\tschema.register( 'paragraph', {\n *\t\t\tallowIn: [ '$root', 'blockQuote' ],\n *\t\t\tisBlock: true\n *\t\t} );\n *\n * Allow `paragraph` everywhere where `$block` is allowed (i.e. in `$root`):\n *\n *\t\tschema.register( 'paragraph', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tisBlock: true\n *\t\t} );\n *\n * Make `image` a block object, which is allowed everywhere where `$block` is.\n * Also, allow `src` and `alt` attributes in it:\n *\n *\t\tschema.register( 'image', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tallowAttributes: [ 'src', 'alt' ],\n *\t\t\tisBlock: true,\n *\t\t\tisObject: true\n *\t\t} );\n *\n * Make `caption` allowed in `image` and make it allow all the content of `$block`s (usually, `$text`).\n * Also, mark it as a limit element so it cannot be split:\n *\n *\t\tschema.register( 'caption', {\n *\t\t\tallowIn: 'image',\n *\t\t\tallowContentOf: '$block',\n *\t\t\tisLimit: true\n *\t\t} );\n *\n * Make `listItem` inherit all from `$block` but also allow additional attributes:\n *\n *\t\tschema.register( 'listItem', {\n *\t\t\tinheritAllFrom: '$block',\n *\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n *\t\t} );\n *\n * Which translates to:\n *\n *\t\tschema.register( 'listItem', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tallowContentOf: '$block',\n *\t\t\tallowAttributesOf: '$block',\n *\t\t\tinheritTypesFrom: '$block',\n *\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n *\t\t} );\n *\n * # Tips\n *\n * * Check schema definitions of existing features to see how they are defined.\n * * If you want to publish your feature so other developers can use it, try to use\n * generic items as much as possible.\n * * Keep your model clean. Limit it to the actual data and store information in a normalized way.\n * * Remember about definining the `is*` properties. They do not affect the allowed structures, but they can\n * affect how the editor features treat your elements.\n *\n * @typedef {Object} module:engine/model/schema~SchemaItemDefinition\n */\n\n/**\n * A simplified version of {@link module:engine/model/schema~SchemaItemDefinition} after\n * compilation by the {@link module:engine/model/schema~Schema schema}.\n * Rules fed to the schema by {@link module:engine/model/schema~Schema#register}\n * and {@link module:engine/model/schema~Schema#extend} methods are defined in the\n * {@link module:engine/model/schema~SchemaItemDefinition} format.\n * Later on, they are compiled to `SchemaCompiledItemDefition` so when you use e.g.\n * the {@link module:engine/model/schema~Schema#getDefinition} method you get the compiled version.\n *\n * The compiled version contains only the following properties:\n *\n * * The `name` property,\n * * The `is*` properties,\n * * The `allowIn` array,\n * * The `allowAttributes` array.\n *\n * @typedef {Object} module:engine/model/schema~SchemaCompiledItemDefinition\n */\n\n/**\n * A schema context — a list of ancestors of a given position in the document.\n *\n * Considering such position:\n *\n *\t\t<$root>\n *\t\t\t<blockQuote>\n *\t\t\t\t<paragraph>\n *\t\t\t\t\t^\n *\t\t\t\t</paragraph>\n *\t\t\t</blockQuote>\n *\t\t</$root>\n *\n * The context of this position is its {@link module:engine/model/position~Position#getAncestors lists of ancestors}:\n *\n *\t\t[ rootElement, blockQuoteElement, paragraphElement ]\n *\n * Contexts are used in the {@link module:engine/model/schema~Schema#event:checkChild `Schema#checkChild`} and\n * {@link module:engine/model/schema~Schema#event:checkAttribute `Schema#checkAttribute`} events as a definition\n * of a place in the document where the check occurs. The context instances are created based on the first arguments\n * of the {@link module:engine/model/schema~Schema#checkChild `Schema#checkChild()`} and\n * {@link module:engine/model/schema~Schema#checkAttribute `Schema#checkAttribute()`} methods so when\n * using these methods you need to use {@link module:engine/model/schema~SchemaContextDefinition}s.\n */\nexport class SchemaContext {\n\t/**\n\t * Creates an instance of the context.\n\t *\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context\n\t */\n\tconstructor( context ) {\n\t\tif ( context instanceof SchemaContext ) {\n\t\t\treturn context;\n\t\t}\n\n\t\tif ( typeof context == 'string' ) {\n\t\t\tcontext = [ context ];\n\t\t} else if ( !Array.isArray( context ) ) {\n\t\t\t// `context` is item or position.\n\t\t\t// Position#getAncestors() doesn't accept any parameters but it works just fine here.\n\t\t\tcontext = context.getAncestors( { includeSelf: true } );\n\t\t}\n\n\t\tif ( context[ 0 ] && typeof context[ 0 ] != 'string' && context[ 0 ].is( 'documentFragment' ) ) {\n\t\t\tcontext.shift();\n\t\t}\n\n\t\tthis._items = context.map( mapContextItem );\n\t}\n\n\t/**\n\t * The number of items.\n\t *\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._items.length;\n\t}\n\n\t/**\n\t * The last item (the lowest node).\n\t *\n\t * @type {module:engine/model/schema~SchemaContextItem}\n\t */\n\tget last() {\n\t\treturn this._items[ this._items.length - 1 ];\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all context items.\n\t *\n\t * @returns {Iterable.<module:engine/model/schema~SchemaContextItem>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._items[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns a new schema context instance with an additional item.\n\t *\n\t * Item can be added as:\n\t *\n\t * \t\tconst context = new SchemaContext( [ '$root' ] );\n\t *\n\t * \t\t// An element.\n\t * \t\tconst fooElement = writer.createElement( 'fooElement' );\n\t * \t\tconst newContext = context.push( fooElement ); // [ '$root', 'fooElement' ]\n\t *\n\t * \t\t// A text node.\n\t * \t\tconst text = writer.createText( 'foobar' );\n\t * \t\tconst newContext = context.push( text ); // [ '$root', '$text' ]\n\t *\n\t * \t\t// A string (element name).\n\t * \t\tconst newContext = context.push( 'barElement' ); // [ '$root', 'barElement' ]\n\t *\n\t * **Note** {@link module:engine/model/node~Node} that is already in the model tree will be added as the only item\n\t * (without ancestors).\n\t *\n\t * @param {String|module:engine/model/node~Node|Array<String|module:engine/model/node~Node>} item An item that will be added\n\t * to the current context.\n\t * @returns {module:engine/model/schema~SchemaContext} A new schema context instance with an additional item.\n\t */\n\tpush( item ) {\n\t\tconst ctx = new SchemaContext( [ item ] );\n\n\t\tctx._items = [ ...this._items, ...ctx._items ];\n\n\t\treturn ctx;\n\t}\n\n\t/**\n\t * Gets an item on the given index.\n\t *\n\t * @returns {module:engine/model/schema~SchemaContextItem}\n\t */\n\tgetItem( index ) {\n\t\treturn this._items[ index ];\n\t}\n\n\t/**\n\t * Returns the names of items.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* getNames() {\n\t\tyield* this._items.map( item => item.name );\n\t}\n\n\t/**\n\t * Checks whether the context ends with the given nodes.\n\t *\n\t *\t\tconst ctx = new SchemaContext( [ rootElement, paragraphElement, textNode ] );\n\t *\n\t *\t\tctx.endsWith( '$text' ); // -> true\n\t *\t\tctx.endsWith( 'paragraph $text' ); // -> true\n\t *\t\tctx.endsWith( '$root' ); // -> false\n\t *\t\tctx.endsWith( 'paragraph' ); // -> false\n\t *\n\t * @param {String} query\n\t * @returns {Boolean}\n\t */\n\tendsWith( query ) {\n\t\treturn Array.from( this.getNames() ).join( ' ' ).endsWith( query );\n\t}\n}\n\n/**\n * The definition of a {@link module:engine/model/schema~SchemaContext schema context}.\n *\n * Contexts can be created in multiple ways:\n *\n * * By defining a **node** – in this cases this node and all its ancestors will be used.\n * * By defining a **position** in the document – in this case all its ancestors will be used.\n * * By defining an **array of nodes** – in this case this array defines the entire context.\n * * By defining a **name of node** - in this case node will be \"mocked\". It is not recommended because context\n * will be unrealistic (e.g. attributes of these nodes are not specified). However, at times this may be the only\n * way to define the context (e.g. when checking some hypothetical situation).\n * * By defining an **array of node names** (potentially, mixed with real nodes) – The same as **name of node**\n * but it is possible to create a path.\n * * By defining a {@link module:engine/model/schema~SchemaContext} instance - in this case the same instance as provided\n * will be return.\n *\n * Examples of context definitions passed to the {@link module:engine/model/schema~Schema#checkChild `Schema#checkChild()`}\n * method:\n *\n *\t\t// Assuming that we have a $root > blockQuote > paragraph structure, the following code\n *\t\t// will check node 'foo' in the following context:\n *\t\t// [ rootElement, blockQuoteElement, paragraphElement ]\n *\t\tconst contextDefinition = paragraphElement;\n * \t\tconst childToCheck = 'foo';\n *\t\tschema.checkChild( contextDefinition, childToCheck );\n *\n *\t\t// Also check in [ rootElement, blockQuoteElement, paragraphElement ].\n *\t\tschema.checkChild( model.createPositionAt( paragraphElement, 0 ), 'foo' );\n *\n *\t\t// Check in [ rootElement, paragraphElement ].\n *\t\tschema.checkChild( [ rootElement, paragraphElement ], 'foo' );\n *\n *\t\t// Check only fakeParagraphElement.\n *\t\tschema.checkChild( 'paragraph', 'foo' );\n *\n *\t\t// Check in [ fakeRootElement, fakeBarElement, paragraphElement ].\n *\t\tschema.checkChild( [ '$root', 'bar', paragraphElement ], 'foo' );\n *\n * All these `checkChild()` calls will fire {@link module:engine/model/schema~Schema#event:checkChild `Schema#checkChild`}\n * events in which `args[ 0 ]` is an instance of the context. Therefore, you can write a listener like this:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst ctx = args[ 0 ];\n *\n *\t\t\tconsole.log( Array.from( ctx.getNames() ) );\n *\t\t} );\n *\n * Which will log the following:\n *\n *\t\t[ '$root', 'blockQuote', 'paragraph' ]\n *\t\t[ '$root', 'paragraph' ]\n *\t\t[ '$root', 'bar', 'paragraph' ]\n *\n * Note: When using the {@link module:engine/model/schema~Schema#checkAttribute `Schema#checkAttribute()`} method\n * you may want to check whether a text node may have an attribute. A {@link module:engine/model/text~Text} is a\n * correct way to define a context so you can do this:\n *\n *\t\tschema.checkAttribute( textNode, 'bold' );\n *\n * But sometimes you want to check whether a text at a given position might've had some attribute,\n * in which case you can create a context by mising an array of elements with a `'$text'` string:\n *\n *\t\t// Check in [ rootElement, paragraphElement, textNode ].\n *\t\tschema.checkChild( [ ...positionInParagraph.getAncestors(), '$text' ], 'bold' );\n *\n * @typedef {module:engine/model/node~Node|module:engine/model/position~Position|module:engine/model/schema~SchemaContext|\n * String|Array.<String|module:engine/model/node~Node>} module:engine/model/schema~SchemaContextDefinition\n */\n\n/**\n * An item of the {@link module:engine/model/schema~SchemaContext schema context}.\n *\n * It contains 3 properties:\n *\n * * `name` – the name of this item,\n * * `* getAttributeKeys()` – a generator of keys of item attributes,\n * * `getAttribute( keyName )` – a method to get attribute values.\n *\n * The context item interface is a highly simplified version of {@link module:engine/model/node~Node} and its role\n * is to expose only the information which schema checks are able to provide (which is the name of the node and\n * node's attributes).\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst ctx = args[ 0 ];\n *\t\t\tconst firstItem = ctx.getItem( 0 );\n *\n *\t\t\tconsole.log( firstItem.name ); // -> '$root'\n *\t\t\tconsole.log( firstItem.getAttribute( 'foo' ) ); // -> 'bar'\n *\t\t\tconsole.log( Array.from( firstItem.getAttributeKeys() ) ); // -> [ 'foo', 'faa' ]\n *\t\t} );\n *\n * @typedef {Object} module:engine/model/schema~SchemaContextItem\n */\n\n/**\n * A structure containing additional metadata describing the attribute.\n *\n * See {@link module:engine/model/schema~Schema#setAttributeProperties `Schema#setAttributeProperties()`} for usage examples.\n *\n * @typedef {Object} module:engine/model/schema~AttributeProperties\n * @property {Boolean} [isFormatting] Indicates that the attribute should be considered as a visual formatting, like `bold`, `italic` or\n * `fontSize` rather than semantic attribute (such as `src`, `listType`, etc.). For example, it is used by the \"Remove format\" feature.\n * @property {Boolean} [copyOnEnter] Indicates that given text attribute should be copied to the next block when enter is pressed.\n */\n\nfunction compileBaseItemRule( sourceItemRules, itemName ) {\n\tconst itemRule = {\n\t\tname: itemName,\n\n\t\tallowIn: [],\n\t\tallowContentOf: [],\n\t\tallowWhere: [],\n\n\t\tallowAttributes: [],\n\t\tallowAttributesOf: [],\n\n\t\tinheritTypesFrom: []\n\t};\n\n\tcopyTypes( sourceItemRules, itemRule );\n\n\tcopyProperty( sourceItemRules, itemRule, 'allowIn' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowContentOf' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowWhere' );\n\n\tcopyProperty( sourceItemRules, itemRule, 'allowAttributes' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowAttributesOf' );\n\n\tcopyProperty( sourceItemRules, itemRule, 'inheritTypesFrom' );\n\n\tmakeInheritAllWork( sourceItemRules, itemRule );\n\n\treturn itemRule;\n}\n\nfunction compileAllowContentOf( compiledDefinitions, itemName ) {\n\tfor ( const allowContentOfItemName of compiledDefinitions[ itemName ].allowContentOf ) {\n\t\t// The allowContentOf property may point to an unregistered element.\n\t\tif ( compiledDefinitions[ allowContentOfItemName ] ) {\n\t\t\tconst allowedChildren = getAllowedChildren( compiledDefinitions, allowContentOfItemName );\n\n\t\t\tallowedChildren.forEach( allowedItem => {\n\t\t\t\tallowedItem.allowIn.push( itemName );\n\t\t\t} );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowContentOf;\n}\n\nfunction compileAllowWhere( compiledDefinitions, itemName ) {\n\tfor ( const allowWhereItemName of compiledDefinitions[ itemName ].allowWhere ) {\n\t\tconst inheritFrom = compiledDefinitions[ allowWhereItemName ];\n\n\t\t// The allowWhere property may point to an unregistered element.\n\t\tif ( inheritFrom ) {\n\t\t\tconst allowedIn = inheritFrom.allowIn;\n\n\t\t\tcompiledDefinitions[ itemName ].allowIn.push( ...allowedIn );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowWhere;\n}\n\nfunction compileAllowAttributesOf( compiledDefinitions, itemName ) {\n\tfor ( const allowAttributeOfItem of compiledDefinitions[ itemName ].allowAttributesOf ) {\n\t\tconst inheritFrom = compiledDefinitions[ allowAttributeOfItem ];\n\n\t\tif ( inheritFrom ) {\n\t\t\tconst inheritAttributes = inheritFrom.allowAttributes;\n\n\t\t\tcompiledDefinitions[ itemName ].allowAttributes.push( ...inheritAttributes );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowAttributesOf;\n}\n\nfunction compileInheritPropertiesFrom( compiledDefinitions, itemName ) {\n\tconst item = compiledDefinitions[ itemName ];\n\n\tfor ( const inheritPropertiesOfItem of item.inheritTypesFrom ) {\n\t\tconst inheritFrom = compiledDefinitions[ inheritPropertiesOfItem ];\n\n\t\tif ( inheritFrom ) {\n\t\t\tconst typeNames = Object.keys( inheritFrom ).filter( name => name.startsWith( 'is' ) );\n\n\t\t\tfor ( const name of typeNames ) {\n\t\t\t\tif ( !( name in item ) ) {\n\t\t\t\t\titem[ name ] = inheritFrom[ name ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tdelete item.inheritTypesFrom;\n}\n\n// Remove items which weren't registered (because it may break some checks or we'd need to complicate them).\n// Make sure allowIn doesn't contain repeated values.\nfunction cleanUpAllowIn( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\tconst existingItems = itemRule.allowIn.filter( itemToCheck => compiledDefinitions[ itemToCheck ] );\n\n\titemRule.allowIn = Array.from( new Set( existingItems ) );\n}\n\nfunction cleanUpAllowAttributes( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\n\titemRule.allowAttributes = Array.from( new Set( itemRule.allowAttributes ) );\n}\n\nfunction copyTypes( sourceItemRules, itemRule ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tconst typeNames = Object.keys( sourceItemRule ).filter( name => name.startsWith( 'is' ) );\n\n\t\tfor ( const name of typeNames ) {\n\t\t\titemRule[ name ] = sourceItemRule[ name ];\n\t\t}\n\t}\n}\n\nfunction copyProperty( sourceItemRules, itemRule, propertyName ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tif ( typeof sourceItemRule[ propertyName ] == 'string' ) {\n\t\t\titemRule[ propertyName ].push( sourceItemRule[ propertyName ] );\n\t\t} else if ( Array.isArray( sourceItemRule[ propertyName ] ) ) {\n\t\t\titemRule[ propertyName ].push( ...sourceItemRule[ propertyName ] );\n\t\t}\n\t}\n}\n\nfunction makeInheritAllWork( sourceItemRules, itemRule ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tconst inheritFrom = sourceItemRule.inheritAllFrom;\n\n\t\tif ( inheritFrom ) {\n\t\t\titemRule.allowContentOf.push( inheritFrom );\n\t\t\titemRule.allowWhere.push( inheritFrom );\n\t\t\titemRule.allowAttributesOf.push( inheritFrom );\n\t\t\titemRule.inheritTypesFrom.push( inheritFrom );\n\t\t}\n\t}\n}\n\nfunction getAllowedChildren( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\n\treturn getValues( compiledDefinitions ).filter( def => def.allowIn.includes( itemRule.name ) );\n}\n\nfunction getValues( obj ) {\n\treturn Object.keys( obj ).map( key => obj[ key ] );\n}\n\nfunction mapContextItem( ctxItem ) {\n\tif ( typeof ctxItem == 'string' ) {\n\t\treturn {\n\t\t\tname: ctxItem,\n\n\t\t\t* getAttributeKeys() {},\n\n\t\t\tgetAttribute() {}\n\t\t};\n\t} else {\n\t\treturn {\n\t\t\t// '$text' means text nodes and text proxies.\n\t\t\tname: ctxItem.is( 'element' ) ? ctxItem.name : '$text',\n\n\t\t\t* getAttributeKeys() {\n\t\t\t\tyield* ctxItem.getAttributeKeys();\n\t\t\t},\n\n\t\t\tgetAttribute( key ) {\n\t\t\t\treturn ctxItem.getAttribute( key );\n\t\t\t}\n\t\t};\n\t}\n}\n\n// Generator function returning values from provided walkers, switching between them at each iteration. If only one walker\n// is provided it will return data only from that walker.\n//\n// @param {module:engine/module/treewalker~TreeWalker} [backward] Walker iterating in backward direction.\n// @param {module:engine/module/treewalker~TreeWalker} [forward] Walker iterating in forward direction.\n// @returns {Iterable.<Object>} Object returned at each iteration contains `value` and `walker` (informing which walker returned\n// given value) fields.\nfunction* combineWalkers( backward, forward ) {\n\tlet done = false;\n\n\twhile ( !done ) {\n\t\tdone = true;\n\n\t\tif ( backward ) {\n\t\t\tconst step = backward.next();\n\n\t\t\tif ( !step.done ) {\n\t\t\t\tdone = false;\n\t\t\t\tyield {\n\t\t\t\t\twalker: backward,\n\t\t\t\t\tvalue: step.value\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\tif ( forward ) {\n\t\t\tconst step = forward.next();\n\n\t\t\tif ( !step.done ) {\n\t\t\t\tdone = false;\n\t\t\t\tyield {\n\t\t\t\t\twalker: forward,\n\t\t\t\t\tvalue: step.value\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Takes an array of non-intersecting ranges. For each of them gets minimal flat ranges covering that range and returns\n// all those minimal flat ranges.\n//\n// @param {Array.<module:engine/model/range~Range>} ranges Ranges to process.\n// @returns {Iterable.<module:engine/model/range~Range>} Minimal flat ranges of given `ranges`.\nfunction* convertToMinimalFlatRanges( ranges ) {\n\tfor ( const range of ranges ) {\n\t\tyield* range.getMinimalFlatRanges();\n\t}\n}\n\nfunction removeDisallowedAttributeFromNode( schema, node, writer ) {\n\tfor ( const attribute of node.getAttributeKeys() ) {\n\t\tif ( !schema.checkAttribute( node, attribute ) ) {\n\t\t\twriter.removeAttribute( attribute, node );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/upcastdispatcher\n */\n\nimport ViewConsumable from './viewconsumable';\nimport ModelRange from '../model/range';\nimport ModelPosition from '../model/position';\nimport { SchemaContext } from '../model/schema';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * `UpcastDispatcher` is a central point of {@link module:engine/view/view view} conversion, which is a process of\n * converting given {@link module:engine/view/documentfragment~DocumentFragment view document fragment} or\n * {@link module:engine/view/element~Element} into another structure.\n * In default application, {@link module:engine/view/view view} is converted to {@link module:engine/model/model}.\n *\n * During conversion process, for all {@link module:engine/view/node~Node view nodes} from the converted view document fragment,\n * `UpcastDispatcher` fires corresponding events. Special callbacks called \"converters\" should listen to\n * `UpcastDispatcher` for those events.\n *\n * Each callback, as the second argument, is passed a special object `data` that has `viewItem`, `modelCursor` and\n * `modelRange` properties. `viewItem` property contains {@link module:engine/view/node~Node view node} or\n * {@link module:engine/view/documentfragment~DocumentFragment view document fragment}\n * that is converted at the moment and might be handled by the callback. `modelRange` property should be used to save the result\n * of conversion and is always a {@link module:engine/model/range~Range} when conversion result is correct.\n * `modelCursor` property is a {@link module:engine/model/position~Position position} on which conversion result will be inserted\n * and is a context according to {@link module:engine/model/schema~Schema schema} will be checked before the conversion.\n * See also {@link ~UpcastDispatcher#convert}. It is also shared by reference by all callbacks listening to given event.\n *\n * The third parameter passed to a callback is an instance of {@link ~UpcastDispatcher}\n * which provides additional tools for converters.\n *\n * Examples of providing callbacks for `UpcastDispatcher`:\n *\n *\t\t// Converter for links (<a>).\n *\t\teditor.data.upcastDispatcher.on( 'element:a', ( evt, data, conversionApi ) => {\n *\t\t\tif ( conversionApi.consumable.consume( data.viewItem, { name: true, attributes: [ 'href' ] } ) ) {\n *\t\t\t\t// <a> element is inline and is represented by an attribute in the model.\n *\t\t\t\t// This is why we need to convert only children.\n *\t\t\t\tconst { modelRange } = conversionApi.convertChildren( data.viewItem, data.modelCursor );\n *\n *\t\t\t\tfor ( let item of modelRange.getItems() ) {\n *\t\t\t\t\tif ( conversionApi.schema.checkAttribute( item, 'linkHref' ) ) {\n *\t\t\t\t\t\tconversionApi.writer.setAttribute( 'linkHref', data.viewItem.getAttribute( 'href' ), item );\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// Convert <p>'s font-size style.\n *\t\t// Note: You should use a low-priority observer in order to ensure that\n *\t\t// it's executed after the element-to-element converter.\n *\t\teditor.data.upcastDispatcher.on( 'element:p', ( evt, data, conversionApi ) => {\n *\t\t\tconst { consumable, schema, writer } = conversionApi;\n *\n *\t\t\tif ( !consumable.consume( data.viewItem, { style: 'font-size' } ) ) {\n *\t\t\t\treturn;\n *\t\t\t}\n *\n *\t\t\tconst fontSize = data.viewItem.getStyle( 'font-size' );\n *\n *\t\t\t// Don't go for the model element after data.modelCursor because it might happen\n *\t\t\t// that a single view element was converted to multiple model elements. Get all of them.\n *\t\t\tfor ( const item of data.modelRange.getItems( { shallow: true } ) ) {\n *\t\t\t\tif ( schema.checkAttribute( item, 'fontSize' ) ) {\n *\t\t\t\t\twriter.setAttribute( 'fontSize', fontSize, item );\n *\t\t\t\t}\n *\t\t\t}\n *\t\t}, { priority: 'low' } );\n *\n *\t\t// Convert all elements which have no custom converter into paragraph (autoparagraphing).\n * \teditor.data.upcastDispatcher.on( 'element', ( evt, data, conversionApi ) => {\n * \t \t// When element is already consumed by higher priority converters then do nothing.\n * \t \tif ( conversionApi.consumable.test( data.viewItem, { name: data.viewItem.name } ) ) {\n * \t \t\t\tconst paragraph = conversionApi.writer.createElement( 'paragraph' );\n *\n * \t \t\t\t// Find allowed parent for paragraph that we are going to insert. If current parent does not allow\n * \t \t\t\t// to insert paragraph but one of the ancestors does then split nodes to allowed parent.\n * \t \t\t\tconst splitResult = conversionApi.splitToAllowedParent( paragraph, data.modelCursor );\n *\n * \t \t\t\t// When there is no split result it means that we can't insert paragraph in this position.\n * \t \t\t\tif ( splitResult ) {\n * \t \t\t\t\t// Insert paragraph in allowed position.\n * \t \t\t\t\tconversionApi.writer.insert( paragraph, splitResult.position );\n *\n * \t \t\t\t\t// Convert children to paragraph.\n * \t \t\t\t\tconst { modelRange } = conversionApi.convertChildren(\n * \t \t\t\t\t\tdata.viewItem,\n * \t \t\t\t\t\tconversionApi.writer.createPositionAt( paragraph, 0 )\n * \t \t\t\t\t);\n *\n * \t\t\t\t\t\t// Set as conversion result, attribute converters may use this property.\n * \t \t\t\t\tdata.modelRange = conversionApi.writer.createRange(\n * \t \t\t\t\t\tconversionApi.writer.createPositionBefore( paragraph ),\n * \t \t\t\t\t\tmodelRange.end\n * \t \t\t\t\t);\n *\n * \t \t\t\t\t// Continue conversion inside paragraph.\n * \t \t\t\t\tdata.modelCursor = data.modelRange.end;\n * \t \t\t\t}\n * \t \t\t}\n * \t \t}\n * \t }, { priority: 'low' } );\n *\n * Before each conversion process, `UpcastDispatcher` fires {@link ~UpcastDispatcher#event:viewCleanup}\n * event which can be used to prepare tree view for conversion.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @fires viewCleanup\n * @fires element\n * @fires text\n * @fires documentFragment\n */\nexport default class UpcastDispatcher {\n\t/**\n\t * Creates a `UpcastDispatcher` that operates using passed API.\n\t *\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi\n\t * @param {Object} [conversionApi] Additional properties for interface that will be passed to events fired\n\t * by `UpcastDispatcher`.\n\t */\n\tconstructor( conversionApi = {} ) {\n\t\t/**\n\t\t * List of the elements that were created during splitting.\n\t\t *\n\t\t * After conversion process the list is cleared.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<module:engine/model/element~Element,Array.<module:engine/model/element~Element>>}\n\t\t */\n\t\tthis._splitParts = new Map();\n\n\t\t/**\n\t\t * Position in the temporary structure where the converted content is inserted. The structure reflect the context of\n\t\t * the target position where the content will be inserted. This property is build based on the context parameter of the\n\t\t * convert method.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/model/position~Position|null}\n\t\t */\n\t\tthis._modelCursor = null;\n\n\t\t/**\n\t\t * Interface passed by dispatcher to the events callbacks.\n\t\t *\n\t\t * @member {module:engine/conversion/upcastdispatcher~UpcastConversionApi}\n\t\t */\n\t\tthis.conversionApi = Object.assign( {}, conversionApi );\n\n\t\t// `convertItem`, `convertChildren` and `splitToAllowedParent` are bound to this `UpcastDispatcher`\n\t\t// instance and set on `conversionApi`. This way only a part of `UpcastDispatcher` API is exposed.\n\t\tthis.conversionApi.convertItem = this._convertItem.bind( this );\n\t\tthis.conversionApi.convertChildren = this._convertChildren.bind( this );\n\t\tthis.conversionApi.splitToAllowedParent = this._splitToAllowedParent.bind( this );\n\t\tthis.conversionApi.getSplitParts = this._getSplitParts.bind( this );\n\t}\n\n\t/**\n\t * Starts the conversion process. The entry point for the conversion.\n\t *\n\t * @fires element\n\t * @fires text\n\t * @fires documentFragment\n\t * @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/element~Element} viewItem\n\t * Part of the view to be converted.\n\t * @param {module:engine/model/writer~Writer} writer Instance of model writer.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context=['$root']] Elements will be converted according to this context.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Model data that is a result of the conversion process\n\t * wrapped in `DocumentFragment`. Converted marker elements will be set as that document fragment's\n\t * {@link module:engine/model/documentfragment~DocumentFragment#markers static markers map}.\n\t */\n\tconvert( viewItem, writer, context = [ '$root' ] ) {\n\t\tthis.fire( 'viewCleanup', viewItem );\n\n\t\t// Create context tree and set position in the top element.\n\t\t// Items will be converted according to this position.\n\t\tthis._modelCursor = createContextTree( context, writer );\n\n\t\t// Store writer in conversion as a conversion API\n\t\t// to be sure that conversion process will use the same batch.\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create consumable values list for conversion process.\n\t\tthis.conversionApi.consumable = ViewConsumable.createFrom( viewItem );\n\n\t\t// Custom data stored by converter for conversion process.\n\t\tthis.conversionApi.store = {};\n\n\t\t// Do the conversion.\n\t\tconst { modelRange } = this._convertItem( viewItem, this._modelCursor );\n\n\t\t// Conversion result is always a document fragment so let's create it.\n\t\tconst documentFragment = writer.createDocumentFragment();\n\n\t\t// When there is a conversion result.\n\t\tif ( modelRange ) {\n\t\t\t// Remove all empty elements that were create while splitting.\n\t\t\tthis._removeEmptyElements();\n\n\t\t\t// Move all items that were converted in context tree to the document fragment.\n\t\t\tfor ( const item of Array.from( this._modelCursor.parent.getChildren() ) ) {\n\t\t\t\twriter.append( item, documentFragment );\n\t\t\t}\n\n\t\t\t// Extract temporary markers elements from model and set as static markers collection.\n\t\t\tdocumentFragment.markers = extractMarkersFromModelFragment( documentFragment, writer );\n\t\t}\n\n\t\t// Clear context position.\n\t\tthis._modelCursor = null;\n\n\t\t// Clear split elements lists.\n\t\tthis._splitParts.clear();\n\n\t\t// Clear conversion API.\n\t\tthis.conversionApi.writer = null;\n\t\tthis.conversionApi.store = null;\n\n\t\t// Return fragment as conversion result.\n\t\treturn documentFragment;\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#convertItem\n\t */\n\t_convertItem( viewItem, modelCursor ) {\n\t\tconst data = Object.assign( { viewItem, modelCursor, modelRange: null } );\n\n\t\tif ( viewItem.is( 'element' ) ) {\n\t\t\tthis.fire( 'element:' + viewItem.name, data, this.conversionApi );\n\t\t} else if ( viewItem.is( 'text' ) ) {\n\t\t\tthis.fire( 'text', data, this.conversionApi );\n\t\t} else {\n\t\t\tthis.fire( 'documentFragment', data, this.conversionApi );\n\t\t}\n\n\t\t// Handle incorrect conversion result.\n\t\tif ( data.modelRange && !( data.modelRange instanceof ModelRange ) ) {\n\t\t\t/**\n\t\t\t * Incorrect conversion result was dropped.\n\t\t\t *\n\t\t\t * {@link module:engine/model/range~Range Model range} should be a conversion result.\n\t\t\t *\n\t\t\t * @error view-conversion-dispatcher-incorrect-result\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-conversion-dispatcher-incorrect-result: Incorrect conversion result was dropped.', this );\n\t\t}\n\n\t\treturn { modelRange: data.modelRange, modelCursor: data.modelCursor };\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#convertChildren\n\t */\n\t_convertChildren( viewItem, modelCursor ) {\n\t\tconst modelRange = new ModelRange( modelCursor );\n\t\tlet nextModelCursor = modelCursor;\n\n\t\tfor ( const viewChild of Array.from( viewItem.getChildren() ) ) {\n\t\t\tconst result = this._convertItem( viewChild, nextModelCursor );\n\n\t\t\tif ( result.modelRange instanceof ModelRange ) {\n\t\t\t\tmodelRange.end = result.modelRange.end;\n\t\t\t\tnextModelCursor = result.modelCursor;\n\t\t\t}\n\t\t}\n\n\t\treturn { modelRange, modelCursor: nextModelCursor };\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#splitToAllowedParent\n\t */\n\t_splitToAllowedParent( node, modelCursor ) {\n\t\t// Try to find allowed parent.\n\t\tconst allowedParent = this.conversionApi.schema.findAllowedParent( modelCursor, node );\n\n\t\t// When there is no parent that allows to insert node then return `null`.\n\t\tif ( !allowedParent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When current position parent allows to insert node then return this position.\n\t\tif ( allowedParent === modelCursor.parent ) {\n\t\t\treturn { position: modelCursor };\n\t\t}\n\n\t\t// When allowed parent is in context tree.\n\t\tif ( this._modelCursor.parent.getAncestors().includes( allowedParent ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Split element to allowed parent.\n\t\tconst splitResult = this.conversionApi.writer.split( modelCursor, allowedParent );\n\n\t\t// Using the range returned by `model.Writer#split`, we will pair original elements with their split parts.\n\t\t//\n\t\t// The range returned from the writer spans \"over the split\" or, precisely saying, from the end of the original element (the one\n\t\t// that got split) to the beginning of the other part of that element:\n\t\t//\n\t\t// <limit><a><b><c>X[]Y</c></b><a></limit> ->\n\t\t// <limit><a><b><c>X[</c></b></a><a><b><c>]Y</c></b></a>\n\t\t//\n\t\t// After the split there cannot be any full node between the positions in `splitRange`. The positions are touching.\n\t\t// Also, because of how splitting works, it is easy to notice, that \"closing tags\" are in the reverse order than \"opening tags\".\n\t\t// Also, since we split all those elements, each of them has to have the other part.\n\t\t//\n\t\t// With those observations in mind, we will pair the original elements with their split parts by saving \"closing tags\" and matching\n\t\t// them with \"opening tags\" in the reverse order. For that we can use a stack.\n\t\tconst stack = [];\n\n\t\tfor ( const treeWalkerValue of splitResult.range.getWalker() ) {\n\t\t\tif ( treeWalkerValue.type == 'elementEnd' ) {\n\t\t\t\tstack.push( treeWalkerValue.item );\n\t\t\t} else {\n\t\t\t\t// There should not be any text nodes after the element is split, so the only other value is `elementStart`.\n\t\t\t\tconst originalPart = stack.pop();\n\t\t\t\tconst splitPart = treeWalkerValue.item;\n\n\t\t\t\tthis._registerSplitPair( originalPart, splitPart );\n\t\t\t}\n\t\t}\n\n\t\treturn {\n\t\t\tposition: splitResult.position,\n\t\t\tcursorParent: splitResult.range.end.parent\n\t\t};\n\t}\n\n\t/**\n\t * Registers that `splitPart` element is a split part of the `originalPart` element.\n\t *\n\t * Data set by this method is used by {@link #_getSplitParts} and {@link #_removeEmptyElements}.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} originalPart\n\t * @param {module:engine/model/element~Element} splitPart\n\t */\n\t_registerSplitPair( originalPart, splitPart ) {\n\t\tif ( !this._splitParts.has( originalPart ) ) {\n\t\t\tthis._splitParts.set( originalPart, [ originalPart ] );\n\t\t}\n\n\t\tconst list = this._splitParts.get( originalPart );\n\n\t\tthis._splitParts.set( splitPart, list );\n\t\tlist.push( splitPart );\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#getSplitParts\n\t */\n\t_getSplitParts( element ) {\n\t\tlet parts;\n\n\t\tif ( !this._splitParts.has( element ) ) {\n\t\t\tparts = [ element ];\n\t\t} else {\n\t\t\tparts = this._splitParts.get( element );\n\t\t}\n\n\t\treturn parts;\n\t}\n\n\t/**\n\t * Checks if there are any empty elements created while splitting and removes them.\n\t *\n\t * This method works recursively to re-check empty elements again after at least one element was removed in the initial call,\n\t * as some elements might have become empty after other empty elements were removed from them.\n\t *\n\t * @private\n\t */\n\t_removeEmptyElements() {\n\t\tlet anyRemoved = false;\n\n\t\tfor ( const element of this._splitParts.keys() ) {\n\t\t\tif ( element.isEmpty ) {\n\t\t\t\tthis.conversionApi.writer.remove( element );\n\t\t\t\tthis._splitParts.delete( element );\n\n\t\t\t\tanyRemoved = true;\n\t\t\t}\n\t\t}\n\n\t\tif ( anyRemoved ) {\n\t\t\tthis._removeEmptyElements();\n\t\t}\n\t}\n\n\t/**\n\t * Fired before the first conversion event, at the beginning of upcast (view to model conversion) process.\n\t *\n\t * @event viewCleanup\n\t * @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/element~Element}\n\t * viewItem Part of the view to be converted.\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/element~Element} is converted.\n\t *\n\t * `element` is a namespace event for a class of events. Names of actually called events follow this pattern:\n\t * `element:<elementName>` where `elementName` is the name of converted element. This way listeners may listen to\n\t * all elements conversion or to conversion of specific elements.\n\t *\n\t * @event element\n\t * @param {Object} data Conversion data. Keep in mind that this object is shared by reference between all\n\t * callbacks that will be called. This means that callbacks can override values if needed, and those values will\n\t * be available in other callbacks.\n\t * @param {module:engine/view/item~Item} data.viewItem Converted item.\n\t * @param {module:engine/model/position~Position} data.modelCursor Position where a converter should start changes.\n\t * Change this value for the next converter to tell where the conversion should continue.\n\t * @param {module:engine/model/range~Range} data.modelRange The current state of conversion result. Every change to\n\t * converted element should be reflected by setting or modifying this property.\n\t * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion utilities to be used by callback.\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/text~Text} is converted.\n\t *\n\t * @event text\n\t * @see #event:element\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/documentfragment~DocumentFragment} is converted.\n\t *\n\t * @event documentFragment\n\t * @see #event:element\n\t */\n}\n\nmix( UpcastDispatcher, EmitterMixin );\n\n// Traverses given model item and searches elements which marks marker range. Found element is removed from\n// DocumentFragment but path of this element is stored in a Map which is then returned.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/node~Node} modelItem Fragment of model.\n// @returns {Map<String, module:engine/model/range~Range>} List of static markers.\nfunction extractMarkersFromModelFragment( modelItem, writer ) {\n\tconst markerElements = new Set();\n\tconst markers = new Map();\n\n\t// Create ModelTreeWalker.\n\tconst range = ModelRange._createIn( modelItem ).getItems();\n\n\t// Walk through DocumentFragment and collect marker elements.\n\tfor ( const item of range ) {\n\t\t// Check if current element is a marker.\n\t\tif ( item.name == '$marker' ) {\n\t\t\tmarkerElements.add( item );\n\t\t}\n\t}\n\n\t// Walk through collected marker elements store its path and remove its from the DocumentFragment.\n\tfor ( const markerElement of markerElements ) {\n\t\tconst markerName = markerElement.getAttribute( 'data-name' );\n\t\tconst currentPosition = writer.createPositionBefore( markerElement );\n\n\t\t// When marker of given name is not stored it means that we have found the beginning of the range.\n\t\tif ( !markers.has( markerName ) ) {\n\t\t\tmarkers.set( markerName, new ModelRange( currentPosition.clone() ) );\n\t\t// Otherwise is means that we have found end of the marker range.\n\t\t} else {\n\t\t\tmarkers.get( markerName ).end = currentPosition.clone();\n\t\t}\n\n\t\t// Remove marker element from DocumentFragment.\n\t\twriter.remove( markerElement );\n\t}\n\n\treturn markers;\n}\n\n// Creates model fragment according to given context and returns position in the bottom (the deepest) element.\nfunction createContextTree( contextDefinition, writer ) {\n\tlet position;\n\n\tfor ( const item of new SchemaContext( contextDefinition ) ) {\n\t\tconst attributes = {};\n\n\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\tattributes[ key ] = item.getAttribute( key );\n\t\t}\n\n\t\tconst current = writer.createElement( item.name, attributes );\n\n\t\tif ( position ) {\n\t\t\twriter.append( current, position );\n\t\t}\n\n\t\tposition = ModelPosition._createAt( current, 0 );\n\t}\n\n\treturn position;\n}\n\n/**\n * Conversion interface that is registered for given {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n * and is passed as one of parameters when {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher dispatcher}\n * fires it's events.\n *\n * @interface module:engine/conversion/upcastdispatcher~UpcastConversionApi\n */\n\n/**\n * Starts conversion of given item by firing an appropriate event.\n *\n * Every fired event is passed (as first parameter) an object with `modelRange` property. Every event may set and/or\n * modify that property. When all callbacks are done, the final value of `modelRange` property is returned by this method.\n * The `modelRange` must be {@link module:engine/model/range~Range model range} or `null` (as set by default).\n *\n * @method #convertItem\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:text\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:documentFragment\n * @param {module:engine/view/item~Item} viewItem Item to convert.\n * @param {module:engine/model/position~Position} modelCursor Position of conversion.\n * @returns {Object} result Conversion result.\n * @returns {module:engine/model/range~Range|null} result.modelRange Model range containing result of item conversion,\n * created and modified by callbacks attached to fired event, or `null` if the conversion result was incorrect.\n * @returns {module:engine/model/position~Position} result.modelCursor Position where conversion should be continued.\n */\n\n/**\n * Starts conversion of all children of given item by firing appropriate events for all those children.\n *\n * @method #convertChildren\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:text\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:documentFragment\n * @param {module:engine/view/item~Item} viewItem Element which children should be converted.\n * @param {module:engine/model/position~Position} modelCursor Position of conversion.\n * @returns {Object} result Conversion result.\n * @returns {module:engine/model/range~Range} result.modelRange Model range containing results of conversion of all children of given item.\n * When no children was converted then range is collapsed.\n * @returns {module:engine/model/position~Position} result.modelCursor Position where conversion should be continued.\n */\n\n/**\n * Checks {@link module:engine/model/schema~Schema schema} to find allowed parent for element that we are going to insert\n * starting from given position. If current parent does not allow to insert element but one of the ancestors does then\n * split nodes to allowed parent.\n *\n * If schema allows to insert node in given position, nothing is split and object with that position is returned.\n *\n * If it was not possible to find allowed parent, `null` is returned, nothing is split.\n *\n * Otherwise, ancestors are split and object with position and the copy of the split element is returned.\n *\n * For instance, if `<image>` is not allowed in `<paragraph>` but is allowed in `$root`:\n *\n *\t\t<paragraph>foo[]bar</paragraph>\n *\n * \t-> split for `<image>` ->\n *\n * \t<paragraph>foo</paragraph>[]<paragraph>bar</paragraph>\n *\n * In the sample above position between `<paragraph>` elements will be returned as `position` and the second `paragraph`\n * as `cursorParent`.\n *\n * @method #splitToAllowedParent\n * @param {module:engine/model/position~Position} position Position on which element is going to be inserted.\n * @param {module:engine/model/node~Node} node Node to insert.\n * @returns {Object|null} Split result. If it was not possible to find allowed position `null` is returned.\n * @returns {module:engine/model/position~Position} position between split elements.\n * @returns {module:engine/model/element~Element} [cursorParent] Element inside which cursor should be placed to\n * continue conversion. When element is not defined it means that there was no split.\n */\n\n/**\n * Returns all the split parts of given `element` that were created during upcasting through using {@link #splitToAllowedParent}.\n * It enables you to easily track those elements and continue processing them after they are split during their children conversion.\n *\n *\t\t<paragraph>Foo<image />bar<image />baz</paragraph> ->\n *\t\t<paragraph>Foo</paragraph><image /><paragraph>bar</paragraph><image /><paragraph>baz</paragraph>\n *\n * For a reference to any of above paragraphs, the function will return all three paragraphs (the original element included),\n * sorted in the order of their creation (the original element is the first one).\n *\n * If given `element` was not split, an array with single element is returned.\n *\n * Example of a usage in a converter code:\n *\n *\t\tconst myElement = conversionApi.writer.createElement( 'myElement' );\n *\n *\t\t// Children conversion may split `myElement`.\n *\t\tconversionApi.convertChildren( myElement, modelCursor );\n *\n *\t\tconst splitParts = conversionApi.getSplitParts( myElement );\n *\t\tconst lastSplitPart = splitParts[ splitParts.length - 1 ];\n *\n *\t\t// Setting `data.modelRange` basing on split parts:\n *\t\tdata.modelRange = conversionApi.writer.createRange(\n *\t\t\tconversionApi.writer.createPositionBefore( myElement ),\n *\t\t\tconversionApi.writer.createPositionAfter( lastSplitPart )\n *\t\t);\n *\n *\t\t// Setting `data.modelCursor` to continue after the last split element:\n *\t\tdata.modelCursor = conversionApi.writer.createPositionAfter( lastSplitPart );\n *\n * **Tip:** if you are unable to get a reference to the original element (for example because the code is split into multiple converters\n * or even classes) but it was already converted, you might want to check first element in `data.modelRange`. This is a common situation\n * if an attribute converter is separated from an element converter.\n *\n * @method #getSplitParts\n * @param {module:engine/model/element~Element} element\n * @returns {Array.<module:engine/model/element~Element>}\n */\n\n/**\n * Stores information about what parts of processed view item are still waiting to be handled. After a piece of view item\n * was converted, appropriate consumable value should be {@link module:engine/conversion/viewconsumable~ViewConsumable#consume consumed}.\n *\n * @member {module:engine/conversion/viewconsumable~ViewConsumable} #consumable\n */\n\n/**\n * Custom data stored by converters for conversion process. Custom properties of this object can be defined and use to\n * pass parameters between converters.\n *\n * The difference between this property and `data` parameter of\n * {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element} is that `data` parameters allows you\n * to pass parameters within a single event and `store` within the whole conversion.\n *\n * @member {Object} #store\n */\n\n/**\n * The model's schema instance.\n *\n * @member {module:engine/model/schema~Schema} #schema\n */\n\n/**\n * The {@link module:engine/model/writer~Writer} instance used to manipulate data during conversion.\n *\n * @member {module:engine/model/writer~Writer} #writer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/controller/datacontroller\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nimport Mapper from '../conversion/mapper';\n\nimport DowncastDispatcher from '../conversion/downcastdispatcher';\nimport { insertText } from '../conversion/downcasthelpers';\n\nimport UpcastDispatcher from '../conversion/upcastdispatcher';\nimport { convertText, convertToModelFragment } from '../conversion/upcasthelpers';\n\nimport ViewDocumentFragment from '../view/documentfragment';\nimport ViewDocument from '../view/document';\nimport ViewDowncastWriter from '../view/downcastwriter';\n\nimport ModelRange from '../model/range';\n\n/**\n * Controller for the data pipeline. The data pipeline controls how data is retrieved from the document\n * and set inside it. Hence, the controller features two methods which allow to {@link ~DataController#get get}\n * and {@link ~DataController#set set} data of the {@link ~DataController#model model}\n * using given:\n *\n * * {@link module:engine/dataprocessor/dataprocessor~DataProcessor data processor},\n * * downcast converters,\n * * upcast converters.\n *\n * An instance of the data controller is always available in the {@link module:core/editor/editor~Editor#data `editor.data`}\n * property:\n *\n *\t\teditor.data.get( { rootName: 'customRoot' } ); // -> '<p>Hello!</p>'\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class DataController {\n\t/**\n\t * Creates a data controller instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Data model.\n\t * @param {module:engine/dataprocessor/dataprocessor~DataProcessor} [dataProcessor] Data processor that should be used\n\t * by the controller.\n\t */\n\tconstructor( model, dataProcessor ) {\n\t\t/**\n\t\t * Data model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Data processor used during the conversion.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/dataprocessor/dataprocessor~DataProcessor}\n\t\t */\n\t\tthis.processor = dataProcessor;\n\n\t\t/**\n\t\t * Mapper used for the conversion. It has no permanent bindings, because they are created when getting data and\n\t\t * cleared directly after the data are converted. However, the mapper is defined as a class property, because\n\t\t * it needs to be passed to the `DowncastDispatcher` as a conversion API.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/mapper~Mapper}\n\t\t */\n\t\tthis.mapper = new Mapper();\n\n\t\t/**\n\t\t * Downcast dispatcher used by the {@link #get get method}. Downcast converters should be attached to it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n\t\t */\n\t\tthis.downcastDispatcher = new DowncastDispatcher( {\n\t\t\tmapper: this.mapper\n\t\t} );\n\t\tthis.downcastDispatcher.on( 'insert:$text', insertText(), { priority: 'lowest' } );\n\n\t\t/**\n\t\t * Upcast dispatcher used by the {@link #set set method}. Upcast converters should be attached to it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n\t\t */\n\t\tthis.upcastDispatcher = new UpcastDispatcher( {\n\t\t\tschema: model.schema\n\t\t} );\n\n\t\t// Define default converters for text and elements.\n\t\t//\n\t\t// Note that if there is no default converter for the element it will be skipped, for instance `<b>foo</b>` will be\n\t\t// converted to nothing. We add `convertToModelFragment` as a last converter so it converts children of that\n\t\t// element to the document fragment so `<b>foo</b>` will be converted to `foo` if there is no converter for `<b>`.\n\t\tthis.upcastDispatcher.on( 'text', convertText(), { priority: 'lowest' } );\n\t\tthis.upcastDispatcher.on( 'element', convertToModelFragment(), { priority: 'lowest' } );\n\t\tthis.upcastDispatcher.on( 'documentFragment', convertToModelFragment(), { priority: 'lowest' } );\n\n\t\tthis.decorate( 'init' );\n\n\t\t// Fire `ready` event when initialisation has completed. Such low level listener gives possibility\n\t\t// to plug into initialisation pipeline without interrupting the initialisation flow.\n\t\tthis.on( 'init', () => {\n\t\t\tthis.fire( 'ready' );\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Returns the model's data converted by downcast dispatchers attached to {@link #downcastDispatcher} and\n\t * formatted by the {@link #processor data processor}.\n\t *\n\t * @param {Object} [options]\n\t * @param {String} [options.rootName='main'] Root name.\n\t * @param {String} [options.trim='empty'] Whether returned data should be trimmed. This option is set to `empty` by default,\n\t * which means whenever editor content is considered empty, an empty string will be returned. To turn off trimming completely\n\t * use `'none'`. In such cases exact content will be returned (for example `<p> </p>` for an empty editor).\n\t * @returns {String} Output data.\n\t */\n\tget( options ) {\n\t\tconst { rootName = 'main', trim = 'empty' } = options || {};\n\n\t\tif ( !this._checkIfRootsExists( [ rootName ] ) ) {\n\t\t\t/**\n\t\t\t * Cannot get data from a non-existing root. This error is thrown when {@link #get DataController#get() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #get} like:\n\t\t\t *\n\t\t\t *\t\tdata.get( { rootName: 'root2' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-get-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-get-non-existent-root: Attempting to get data from a non-existing root.', this );\n\t\t}\n\n\t\tconst root = this.model.document.getRoot( rootName );\n\n\t\tif ( trim === 'empty' && !this.model.hasContent( root, { ignoreWhitespaces: true } ) ) {\n\t\t\treturn '';\n\t\t}\n\n\t\treturn this.stringify( root );\n\t}\n\n\t/**\n\t * Returns the content of the given {@link module:engine/model/element~Element model's element} or\n\t * {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the downcast converters\n\t * attached to {@link #downcastDispatcher} and formatted by the {@link #processor data processor}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment\n\t * Element whose content will be stringified.\n\t * @returns {String} Output data.\n\t */\n\tstringify( modelElementOrFragment ) {\n\t\t// Model -> view.\n\t\tconst viewDocumentFragment = this.toView( modelElementOrFragment );\n\n\t\t// View -> data.\n\t\treturn this.processor.toData( viewDocumentFragment );\n\t}\n\n\t/**\n\t * Returns the content of the given {@link module:engine/model/element~Element model element} or\n\t * {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the downcast\n\t * converters attached to {@link #downcastDispatcher} to a\n\t * {@link module:engine/view/documentfragment~DocumentFragment view document fragment}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment\n\t * Element or document fragment whose content will be converted.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} Output view DocumentFragment.\n\t */\n\ttoView( modelElementOrFragment ) {\n\t\t// Clear bindings so the call to this method gives correct results.\n\t\tthis.mapper.clearBindings();\n\n\t\t// First, convert elements.\n\t\tconst modelRange = ModelRange._createIn( modelElementOrFragment );\n\n\t\tconst viewDocumentFragment = new ViewDocumentFragment();\n\n\t\t// Create separate ViewDowncastWriter just for data conversion purposes.\n\t\t// We have no view controller and rendering do DOM in DataController so view.change() block is not used here.\n\t\tconst viewWriter = new ViewDowncastWriter( new ViewDocument() );\n\t\tthis.mapper.bindElements( modelElementOrFragment, viewDocumentFragment );\n\n\t\tthis.downcastDispatcher.convertInsert( modelRange, viewWriter );\n\n\t\tif ( !modelElementOrFragment.is( 'documentFragment' ) ) {\n\t\t\t// Then, if a document element is converted, convert markers.\n\t\t\t// From all document markers, get those, which \"intersect\" with the converter element.\n\t\t\tconst markers = _getMarkersRelativeToElement( modelElementOrFragment );\n\n\t\t\tfor ( const [ name, range ] of markers ) {\n\t\t\t\tthis.downcastDispatcher.convertMarkerAdd( name, range, viewWriter );\n\t\t\t}\n\t\t}\n\n\t\treturn viewDocumentFragment;\n\t}\n\n\t/**\n\t * Sets initial input data parsed by the {@link #processor data processor} and\n\t * converted by the {@link #upcastDispatcher view-to-model converters}.\n\t * Initial data can be set only to document that {@link module:engine/model/document~Document#version} is equal 0.\n\t *\n\t * **Note** This method is {@link module:utils/observablemixin~ObservableMixin#decorate decorated} which is\n\t * used by e.g. collaborative editing plugin that syncs remote data on init.\n\t *\n\t * When data is passed as a string it is initialized on a default `main` root:\n\t *\n\t *\t\tdataController.init( '<p>Foo</p>' ); // Initializes data on the `main` root.\n\t *\n\t * To initialize data on a different root or multiple roots at once, object containing `rootName` - `data` pairs should be passed:\n\t *\n\t *\t\tdataController.init( { main: '<p>Foo</p>', title: '<h1>Bar</h1>' } ); // Initializes data on the `main` and `title` roots.\n\t *\n\t * @fires init\n\t * @param {String|Object.<String,String>} data Input data as a string or an object containing `rootName` - `data`\n\t * pairs to initialize data on multiple roots at once.\n\t * @returns {Promise} Promise that is resolved after the data is set on the editor.\n\t */\n\tinit( data ) {\n\t\tif ( this.model.document.version ) {\n\t\t\t/**\n\t\t\t * Cannot set initial data to not empty {@link module:engine/model/document~Document}.\n\t\t\t * Initial data should be set once, during {@link module:core/editor/editor~Editor} initialization,\n\t\t\t * when the {@link module:engine/model/document~Document#version} is equal 0.\n\t\t\t *\n\t\t\t * @error datacontroller-init-document-not-empty\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-init-document-not-empty: Trying to set initial data to not empty document.', this );\n\t\t}\n\n\t\tlet initialData = {};\n\t\tif ( typeof data === 'string' ) {\n\t\t\tinitialData.main = data; // Default root is 'main'. To initiate data on a different root, object should be passed.\n\t\t} else {\n\t\t\tinitialData = data;\n\t\t}\n\n\t\tif ( !this._checkIfRootsExists( Object.keys( initialData ) ) ) {\n\t\t\t/**\n\t\t\t * Cannot init data on a non-existing root. This error is thrown when {@link #init DataController#init() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #init} like:\n\t\t\t *\n\t\t\t * \t\tdata.init( { main: '<p>Foo</p>', root2: '<p>Bar</p>' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-init-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.', this );\n\t\t}\n\n\t\tthis.model.enqueueChange( 'transparent', writer => {\n\t\t\tfor ( const rootName of Object.keys( initialData ) ) {\n\t\t\t\tconst modelRoot = this.model.document.getRoot( rootName );\n\t\t\t\twriter.insert( this.parse( initialData[ rootName ], modelRoot ), modelRoot, 0 );\n\t\t\t}\n\t\t} );\n\n\t\treturn Promise.resolve();\n\t}\n\n\t/**\n\t * Sets input data parsed by the {@link #processor data processor} and\n\t * converted by the {@link #upcastDispatcher view-to-model converters}.\n\t * This method can be used any time to replace existing editor data by the new one without clearing the\n\t * {@link module:engine/model/document~Document#history document history}.\n\t *\n\t * This method also creates a batch with all the changes applied. If all you need is to parse data, use\n\t * the {@link #parse} method.\n\t *\n\t * When data is passed as a string it is set on a default `main` root:\n\t *\n\t *\t\tdataController.set( '<p>Foo</p>' ); // Sets data on the `main` root.\n\t *\n\t * To set data on a different root or multiple roots at once, object containing `rootName` - `data` pairs should be passed:\n\t *\n\t *\t\tdataController.set( { main: '<p>Foo</p>', title: '<h1>Bar</h1>' } ); // Sets data on the `main` and `title` roots.\n\t *\n\t * @param {String|Object.<String,String>} data Input data as a string or an object containing `rootName` - `data`\n\t * pairs to set data on multiple roots at once.\n\t */\n\tset( data ) {\n\t\tlet newData = {};\n\n\t\tif ( typeof data === 'string' ) {\n\t\t\tnewData.main = data; // Default root is 'main'. To set data on a different root, object should be passed.\n\t\t} else {\n\t\t\tnewData = data;\n\t\t}\n\n\t\tif ( !this._checkIfRootsExists( Object.keys( newData ) ) ) {\n\t\t\t/**\n\t\t\t * Cannot set data on a non-existing root. This error is thrown when {@link #set DataController#set() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #set} like:\n\t\t\t *\n\t\t\t * \t\tdata.set( { main: '<p>Foo</p>', root2: '<p>Bar</p>' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-set-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-set-non-existent-root: Attempting to set data on a non-existing root.', this );\n\t\t}\n\n\t\tthis.model.enqueueChange( 'transparent', writer => {\n\t\t\twriter.setSelection( null );\n\t\t\twriter.removeSelectionAttribute( this.model.document.selection.getAttributeKeys() );\n\n\t\t\tfor ( const rootName of Object.keys( newData ) ) {\n\t\t\t\t// Save to model.\n\t\t\t\tconst modelRoot = this.model.document.getRoot( rootName );\n\n\t\t\t\twriter.remove( writer.createRangeIn( modelRoot ) );\n\t\t\t\twriter.insert( this.parse( newData[ rootName ], modelRoot ), modelRoot, 0 );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns the data parsed by the {@link #processor data processor} and then converted by upcast converters\n\t * attached to the {@link #upcastDispatcher}.\n\t *\n\t * @see #set\n\t * @param {String} data Data to parse.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context='$root'] Base context in which the view will\n\t * be converted to the model. See: {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#convert}.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Parsed data.\n\t */\n\tparse( data, context = '$root' ) {\n\t\t// data -> view\n\t\tconst viewDocumentFragment = this.processor.toView( data );\n\n\t\t// view -> model\n\t\treturn this.toModel( viewDocumentFragment, context );\n\t}\n\n\t/**\n\t * Returns the result of the given {@link module:engine/view/element~Element view element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment view document fragment} converted by the\n\t * {@link #upcastDispatcher view-to-model converters}, wrapped by {@link module:engine/model/documentfragment~DocumentFragment}.\n\t *\n\t * When marker elements were converted during the conversion process, it will be set as a document fragment's\n\t * {@link module:engine/model/documentfragment~DocumentFragment#markers static markers map}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElementOrFragment\n\t * Element or document fragment whose content will be converted.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context='$root'] Base context in which the view will\n\t * be converted to the model. See: {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#convert}.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Output document fragment.\n\t */\n\ttoModel( viewElementOrFragment, context = '$root' ) {\n\t\treturn this.model.change( writer => {\n\t\t\treturn this.upcastDispatcher.convert( viewElementOrFragment, writer, context );\n\t\t} );\n\t}\n\n\t/**\n\t * Removes all event listeners set by the DataController.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks if all provided root names are existing editor roots.\n\t *\n\t * @private\n\t * @param {Array.<String>} rootNames Root names to check.\n\t * @returns {Boolean} Whether all provided root names are existing editor roots.\n\t */\n\t_checkIfRootsExists( rootNames ) {\n\t\tfor ( const rootName of rootNames ) {\n\t\t\tif ( !this.model.document.getRootNames().includes( rootName ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Event fired once data initialisation has finished.\n\t *\n\t * @event ready\n\t */\n\n\t/**\n\t * Event fired after {@link #init init() method} has been run. It can be {@link #listenTo listened to} to adjust/modify\n\t * the initialisation flow. However, if the `init` event is stopped or prevented, the {@link #event:ready ready event}\n\t * should be fired manually.\n\t *\n\t * The `init` event is fired by decorated {@link #init} method.\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * @event init\n\t */\n}\n\nmix( DataController, ObservableMixin );\n\n// Helper function for downcast conversion.\n//\n// Takes a document element (element that is added to a model document) and checks which markers are inside it\n// and which markers are containing it. If the marker is intersecting with element, the intersection is returned.\nfunction _getMarkersRelativeToElement( element ) {\n\tconst result = [];\n\tconst doc = element.root.document;\n\n\tif ( !doc ) {\n\t\treturn [];\n\t}\n\n\tconst elementRange = ModelRange._createIn( element );\n\n\tfor ( const marker of doc.model.markers ) {\n\t\tconst intersection = elementRange.getIntersection( marker.getRange() );\n\n\t\tif ( intersection ) {\n\t\t\tresult.push( [ marker.name, intersection ] );\n\t\t}\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/batch\n */\n\n/**\n * A batch instance groups model changes ({@link module:engine/model/operation/operation~Operation operations}). All operations\n * grouped in a single batch can be reverted together, so you can also think about a batch as of a single undo step. If you want\n * to extend a given undo step, you can add more changes to the batch using {@link module:engine/model/model~Model#enqueueChange}:\n *\n *\t\tmodel.enqueueChange( batch, writer => {\n *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n *\t\t} );\n *\n * @see module:engine/model/model~Model#enqueueChange\n * @see module:engine/model/model~Model#change\n */\nexport default class Batch {\n\t/**\n\t * Creates a batch instance.\n\t *\n\t * @see module:engine/model/model~Model#enqueueChange\n\t * @see module:engine/model/model~Model#change\n\t * @param {'transparent'|'default'} [type='default'] The type of the batch.\n\t */\n\tconstructor( type = 'default' ) {\n\t\t/**\n\t\t * An array of operations that compose this batch.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Array.<module:engine/model/operation/operation~Operation>}\n\t\t */\n\t\tthis.operations = [];\n\n\t\t/**\n\t\t * The type of the batch.\n\t\t *\n\t\t * It can be one of the following values:\n\t\t * * `'default'` – All \"normal\" batches. This is the most commonly used type.\n\t\t * * `'transparent'` – A batch that should be ignored by other features, i.e. an initial batch or collaborative editing\n\t\t * changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {'transparent'|'default'}\n\t\t */\n\t\tthis.type = type;\n\t}\n\n\t/**\n\t * Returns the base version of this batch, which is equal to the base version of the first operation in the batch.\n\t * If there are no operations in the batch or neither operation has the base version set, it returns `null`.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget baseVersion() {\n\t\tfor ( const op of this.operations ) {\n\t\t\tif ( op.baseVersion !== null ) {\n\t\t\t\treturn op.baseVersion;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Adds an operation to the batch instance.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation An operation to add.\n\t * @returns {module:engine/model/operation/operation~Operation} The added operation.\n\t */\n\taddOperation( operation ) {\n\t\toperation.batch = this;\n\t\tthis.operations.push( operation );\n\n\t\treturn operation;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/operation\n */\n\n/**\n * Abstract base operation class.\n *\n * @abstract\n */\nexport default class Operation {\n\t/**\n\t * Base operation constructor.\n\t *\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( baseVersion ) {\n\t\t/**\n\t\t * {@link module:engine/model/document~Document#version} on which operation can be applied. If you try to\n\t\t * {@link module:engine/model/model~Model#applyOperation apply} operation with different base version than the\n\t\t * {@link module:engine/model/document~Document#version document version} the\n\t\t * {@link module:utils/ckeditorerror~CKEditorError model-document-applyOperation-wrong-version} error is thrown.\n\t\t *\n\t\t * @member {Number}\n\t\t */\n\t\tthis.baseVersion = baseVersion;\n\n\t\t/**\n\t\t * Defines whether operation is executed on attached or detached {@link module:engine/model/item~Item items}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isDocumentOperation\n\t\t */\n\t\tthis.isDocumentOperation = this.baseVersion !== null;\n\n\t\t/**\n\t\t * {@link module:engine/model/batch~Batch Batch} to which the operation is added or `null` if the operation is not\n\t\t * added to any batch yet.\n\t\t *\n\t\t * @member {module:engine/model/batch~Batch|null} #batch\n\t\t */\n\t\tthis.batch = null;\n\n\t\t/**\n\t\t * Operation type.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #type\n\t\t */\n\n\t\t/**\n\t\t * Creates and returns an operation that has the same parameters as this operation.\n\t\t *\n\t\t * @method #clone\n\t\t * @returns {module:engine/model/operation/operation~Operation} Clone of this operation.\n\t\t */\n\n\t\t/**\n\t\t * Creates and returns a reverse operation. Reverse operation when executed right after\n\t\t * the original operation will bring back tree model state to the point before the original\n\t\t * operation execution. In other words, it reverses changes done by the original operation.\n\t\t *\n\t\t * Keep in mind that tree model state may change since executing the original operation,\n\t\t * so reverse operation will be \"outdated\". In that case you will need to transform it by\n\t\t * all operations that were executed after the original operation.\n\t\t *\n\t\t * @method #getReversed\n\t\t * @returns {module:engine/model/operation/operation~Operation} Reversed operation.\n\t\t */\n\n\t\t/**\n\t\t * Executes the operation - modifications described by the operation properties will be applied to the model tree.\n\t\t *\n\t\t * @protected\n\t\t * @method #_execute\n\t\t */\n\t}\n\n\t/**\n\t * Checks whether the operation's parameters are correct and the operation can be correctly executed. Throws\n\t * an error if operation is not valid.\n\t *\n\t * @protected\n\t * @method #_validate\n\t */\n\t_validate() {\n\t}\n\n\t/**\n\t * Custom toJSON method to solve child-parent circular dependencies.\n\t *\n\t * @method #toJSON\n\t * @returns {Object} Clone of this object with the operation property replaced with string.\n\t */\n\ttoJSON() {\n\t\t// This method creates only a shallow copy, all nested objects should be defined separately.\n\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/1477.\n\t\tconst json = Object.assign( {}, this );\n\n\t\tjson.__className = this.constructor.className;\n\n\t\t// Remove reference to the parent `Batch` to avoid circular dependencies.\n\t\tdelete json.batch;\n\n\t\t// Only document operations are shared with other clients so it is not necessary to keep this information.\n\t\tdelete json.isDocumentOperation;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Name of the operation class used for serialization.\n\t *\n\t * @type {String}\n\t */\n\tstatic get className() {\n\t\treturn 'Operation';\n\t}\n\n\t/**\n\t * Creates Operation object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} doc Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/operation~Operation}\n\t */\n\tstatic fromJSON( json ) {\n\t\treturn new this( json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.toString() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/model/documentfragment\n */\n\nimport NodeList from './nodelist';\nimport Element from './element';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n// @if CK_DEBUG_ENGINE // const { stringifyMap } = require( '../dev-utils/utils' );\n\n/**\n * DocumentFragment represents a part of model which does not have a common root but it's top-level nodes\n * can be seen as siblings. In other words, it is a detached part of model tree, without a root.\n *\n * DocumentFragment has own {@link module:engine/model/markercollection~MarkerCollection}. Markers from this collection\n * will be set to the {@link module:engine/model/model~Model#markers model markers} by a\n * {@link module:engine/model/writer~Writer#insert} function.\n */\nexport default class DocumentFragment {\n\t/**\n\t * Creates an empty `DocumentFragment`.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createDocumentFragment} method instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/node~Node|Iterable.<module:engine/model/node~Node>} [children]\n\t * Nodes to be contained inside the `DocumentFragment`.\n\t */\n\tconstructor( children ) {\n\t\t/**\n\t\t * DocumentFragment static markers map. This is a list of names and {@link module:engine/model/range~Range ranges}\n\t\t * which will be set as Markers to {@link module:engine/model/model~Model#markers model markers collection}\n\t\t * when DocumentFragment will be inserted to the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Map<String,module:engine/model/range~Range>} module:engine/model/documentfragment~DocumentFragment#markers\n\t\t */\n\t\tthis.markers = new Map();\n\n\t\t/**\n\t\t * List of nodes contained inside the document fragment.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/documentfragment~DocumentFragment#_children\n\t\t */\n\t\tthis._children = new NodeList();\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all nodes contained inside this document fragment.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this.getChildren();\n\t}\n\n\t/**\n\t * Number of this document fragment's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all of this document fragment's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._children.maxOffset;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this document fragment, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Artificial root of `DocumentFragment`. Returns itself. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Artificial parent of `DocumentFragment`. Returns `null`. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {null}\n\t */\n\tget parent() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocFrag.is( 'documentFragment' ); // -> true\n\t *\t\tdocFrag.is( 'model:documentFragment' ); // -> true\n\t *\n\t *\t\tdocFrag.is( 'view:documentFragment' ); // -> false\n\t *\t\tdocFrag.is( 'element' ); // -> false\n\t *\t\tdocFrag.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'documentFragment' || type == 'model:documentFragment';\n\t}\n\n\t/**\n\t * Gets the child at the given index. Returns `null` if incorrect index was passed.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/model/node~Node|null} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children.getNode( index );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all of this document fragment's children.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an index of the given child node. Returns `null` if given node is not a child of this document fragment.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's index.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.getNodeIndex( node );\n\t}\n\n\t/**\n\t * Returns the starting offset of given child. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all node's siblings that are before it. Returns `null` if\n\t * given node is not a child of this document fragment.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's starting offset.\n\t */\n\tgetChildStartOffset( node ) {\n\t\treturn this._children.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Returns path to a `DocumentFragment`, which is an empty array. Added for compatibility reasons.\n\t *\n\t * @returns {Array}\n\t */\n\tgetPath() {\n\t\treturn [];\n\t}\n\n\t/**\n\t * Returns a descendant node by its path relative to this element.\n\t *\n\t *\t\t// <this>a<b>c</b></this>\n\t *\t\tthis.getNodeByPath( [ 0 ] ); // -> \"a\"\n\t *\t\tthis.getNodeByPath( [ 1 ] ); // -> <b>\n\t *\t\tthis.getNodeByPath( [ 1, 0 ] ); // -> \"c\"\n\t *\n\t * @param {Array.<Number>} relativePath Path of the node to find, relative to this element.\n\t * @returns {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tgetNodeByPath( relativePath ) {\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\tfor ( const index of relativePath ) {\n\t\t\tnode = node.getChild( node.offsetToIndex( index ) );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Converts offset \"position\" to index \"position\".\n\t *\n\t * Returns index of a node that occupies given offset. If given offset is too low, returns `0`. If given offset is\n\t * too high, returns index after last child}.\n\t *\n\t *\t\tconst textNode = new Text( 'foo' );\n\t *\t\tconst pElement = new Element( 'p' );\n\t *\t\tconst docFrag = new DocumentFragment( [ textNode, pElement ] );\n\t *\t\tdocFrag.offsetToIndex( -1 ); // Returns 0, because offset is too low.\n\t *\t\tdocFrag.offsetToIndex( 0 ); // Returns 0, because offset 0 is taken by `textNode` which is at index 0.\n\t *\t\tdocFrag.offsetToIndex( 1 ); // Returns 0, because `textNode` has `offsetSize` equal to 3, so it occupies offset 1 too.\n\t *\t\tdocFrag.offsetToIndex( 2 ); // Returns 0.\n\t *\t\tdocFrag.offsetToIndex( 3 ); // Returns 1.\n\t *\t\tdocFrag.offsetToIndex( 4 ); // Returns 2. There are no nodes at offset 4, so last available index is returned.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number} Index of a node that occupies given offset.\n\t */\n\toffsetToIndex( offset ) {\n\t\treturn this._children.offsetToIndex( offset );\n\t}\n\n\t/**\n\t * Converts `DocumentFragment` instance to plain object and returns it.\n\t * Takes care of converting all of this document fragment's children.\n\t *\n\t * @returns {Object} `DocumentFragment` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = [];\n\n\t\tfor ( const node of this._children ) {\n\t\t\tjson.push( node.toJSON() );\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a `DocumentFragment` instance from given plain object (i.e. parsed JSON string).\n\t * Converts `DocumentFragment` children to proper nodes.\n\t *\n\t * @param {Object} json Plain object to be converted to `DocumentFragment`.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} `DocumentFragment` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\tconst children = [];\n\n\t\tfor ( const child of json ) {\n\t\t\tif ( child.name ) {\n\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t} else {\n\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t}\n\t\t}\n\n\t\treturn new DocumentFragment( children );\n\t}\n\n\t/**\n\t * {@link #_insertChild Inserts} one or more nodes at the end of this document fragment.\n\t *\n\t * @protected\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_appendChild( items ) {\n\t\tthis._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Inserts one or more nodes at the given index and sets {@link module:engine/model/node~Node#parent parent} of these nodes\n\t * to this document fragment.\n\t *\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_insertChild( index, items ) {\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\t\t}\n\n\t\tthis._children._insertNodes( index, nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index\n\t * and sets {@link module:engine/model/node~Node#parent parent} of these nodes to `null`.\n\t *\n\t * @protected\n\t * @param {Number} index Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tconst nodes = this._children._removeNodes( index, howMany );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tnode.parent = null;\n\t\t}\n\n\t\treturn nodes;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn 'documentFragment';\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelDocumentFragment: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // printTree() {\n\t// @if CK_DEBUG_ENGINE //\tlet string = 'ModelDocumentFragment: [';\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tstring += '\\n';\n\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tconst textAttrs = stringifyMap( child._attrs );\n\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\t'.repeat( 1 );\n\n\t// @if CK_DEBUG_ENGINE //\t\t\tif ( textAttrs !== '' ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\t\tstring += `<$text${ textAttrs }>` + child.data + '</$text>';\n\t// @if CK_DEBUG_ENGINE //\t\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\t\tstring += child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t\t}\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += child.printTree( 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\n]';\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>}\n// @returns {Iterable.<module:engine/model/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data, node.getAttributes() );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/utils\n */\n\nimport Node from '../node';\nimport Text from '../text';\nimport TextProxy from '../textproxy';\nimport Range from '../range';\nimport DocumentFragment from '../documentfragment';\nimport NodeList from '../nodelist';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Contains functions used for composing model tree by {@link module:engine/model/operation/operation~Operation operations}.\n * Those functions are built on top of {@link module:engine/model/node~Node node}, and it's child classes', APIs.\n *\n * @protected\n * @namespace utils\n */\n\n/**\n * Inserts given nodes at given position.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.insert\n * @param {module:engine/model/position~Position} position Position at which nodes should be inserted.\n * @param {module:engine/model/node~NodeSet} nodes Nodes to insert.\n * @returns {module:engine/model/range~Range} Range spanning over inserted elements.\n */\nexport function _insert( position, nodes ) {\n\tnodes = _normalizeNodes( nodes );\n\n\t// We have to count offset before inserting nodes because they can get merged and we would get wrong offsets.\n\tconst offset = nodes.reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\tconst parent = position.parent;\n\n\t// Insertion might be in a text node, we should split it if that's the case.\n\t_splitNodeAtPosition( position );\n\tconst index = position.index;\n\n\t// Insert nodes at given index. After splitting we have a proper index and insertion is between nodes,\n\t// using basic `Element` API.\n\tparent._insertChild( index, nodes );\n\n\t// Merge text nodes, if possible. Merging is needed only at points where inserted nodes \"touch\" \"old\" nodes.\n\t_mergeNodesAtIndex( parent, index + nodes.length );\n\t_mergeNodesAtIndex( parent, index );\n\n\treturn new Range( position, position.getShiftedBy( offset ) );\n}\n\n/**\n * Removed nodes in given range. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils._remove\n * @param {module:engine/model/range~Range} range Range containing nodes to remove.\n * @returns {Array.<module:engine/model/node~Node>}\n */\nexport function _remove( range ) {\n\tif ( !range.isFlat ) {\n\t\t/**\n\t\t * Trying to remove a range which starts and ends in different element.\n\t\t *\n\t\t * @error operation-utils-remove-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'operation-utils-remove-range-not-flat: ' +\n\t\t\t'Trying to remove a range which starts and ends in different element.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tconst parent = range.start.parent;\n\n\t// Range may be inside text nodes, we have to split them if that's the case.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Remove the text nodes using basic `Element` API.\n\tconst removed = parent._removeChildren( range.start.index, range.end.index - range.start.index );\n\n\t// Merge text nodes, if possible. After some nodes were removed, node before and after removed range will be\n\t// touching at the position equal to the removed range beginning. We check merging possibility there.\n\t_mergeNodesAtIndex( parent, range.start.index );\n\n\treturn removed;\n}\n\n/**\n * Moves nodes in given range to given target position. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.move\n * @param {module:engine/model/range~Range} sourceRange Range containing nodes to move.\n * @param {module:engine/model/position~Position} targetPosition Position to which nodes should be moved.\n * @returns {module:engine/model/range~Range} Range containing moved nodes.\n */\nexport function _move( sourceRange, targetPosition ) {\n\tif ( !sourceRange.isFlat ) {\n\t\t/**\n\t\t * Trying to move a range which starts and ends in different element.\n\t\t *\n\t\t * @error operation-utils-move-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'operation-utils-move-range-not-flat: ' +\n\t\t\t'Trying to move a range which starts and ends in different element.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tconst nodes = _remove( sourceRange );\n\n\t// We have to fix `targetPosition` because model changed after nodes from `sourceRange` got removed and\n\t// that change might have an impact on `targetPosition`.\n\ttargetPosition = targetPosition._getTransformedByDeletion( sourceRange.start, sourceRange.end.offset - sourceRange.start.offset );\n\n\treturn _insert( targetPosition, nodes );\n}\n\n/**\n * Sets given attribute on nodes in given range. The attributes are only set on top-level nodes of the range, not on its children.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils._setAttribute\n * @param {module:engine/model/range~Range} range Range containing nodes that should have the attribute set. Must be a flat range.\n * @param {String} key Key of attribute to set.\n * @param {*} value Attribute value.\n */\nexport function _setAttribute( range, key, value ) {\n\t// Range might start or end in text nodes, so we have to split them.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Iterate over all items in the range.\n\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t// Iterator will return `TextProxy` instances but we know that those text proxies will\n\t\t// always represent full text nodes (this is guaranteed thanks to splitting we did before).\n\t\t// So, we can operate on those text proxies' text nodes.\n\t\tconst node = item.is( 'textProxy' ) ? item.textNode : item;\n\n\t\tif ( value !== null ) {\n\t\t\tnode._setAttribute( key, value );\n\t\t} else {\n\t\t\tnode._removeAttribute( key );\n\t\t}\n\n\t\t// After attributes changing it may happen that some text nodes can be merged. Try to merge with previous node.\n\t\t_mergeNodesAtIndex( node.parent, node.index );\n\t}\n\n\t// Try to merge last changed node with it's previous sibling (not covered by the loop above).\n\t_mergeNodesAtIndex( range.end.parent, range.end.index );\n}\n\n/**\n * Normalizes given object or an array of objects to an array of {@link module:engine/model/node~Node nodes}. See\n * {@link module:engine/model/node~NodeSet NodeSet} for details on how normalization is performed.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.normalizeNodes\n * @param {module:engine/model/node~NodeSet} nodes Objects to normalize.\n * @returns {Array.<module:engine/model/node~Node>} Normalized nodes.\n */\nexport function _normalizeNodes( nodes ) {\n\tconst normalized = [];\n\n\tif ( !( nodes instanceof Array ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Convert instances of classes other than Node.\n\tfor ( let i = 0; i < nodes.length; i++ ) {\n\t\tif ( typeof nodes[ i ] == 'string' ) {\n\t\t\tnormalized.push( new Text( nodes[ i ] ) );\n\t\t} else if ( nodes[ i ] instanceof TextProxy ) {\n\t\t\tnormalized.push( new Text( nodes[ i ].data, nodes[ i ].getAttributes() ) );\n\t\t} else if ( nodes[ i ] instanceof DocumentFragment || nodes[ i ] instanceof NodeList ) {\n\t\t\tfor ( const child of nodes[ i ] ) {\n\t\t\t\tnormalized.push( child );\n\t\t\t}\n\t\t} else if ( nodes[ i ] instanceof Node ) {\n\t\t\tnormalized.push( nodes[ i ] );\n\t\t}\n\t\t// Skip unrecognized type.\n\t}\n\n\t// Merge text nodes.\n\tfor ( let i = 1; i < normalized.length; i++ ) {\n\t\tconst node = normalized[ i ];\n\t\tconst prev = normalized[ i - 1 ];\n\n\t\tif ( node instanceof Text && prev instanceof Text && _haveSameAttributes( node, prev ) ) {\n\t\t\t// Doing this instead changing `prev.data` because `data` is readonly.\n\t\t\tnormalized.splice( i - 1, 2, new Text( prev.data + node.data, prev.getAttributes() ) );\n\t\t\ti--;\n\t\t}\n\t}\n\n\treturn normalized;\n}\n\n// Checks if nodes before and after given index in given element are {@link module:engine/model/text~Text text nodes} and\n// merges them into one node if they have same attributes.\n//\n// Merging is done by removing two text nodes and inserting a new text node containing data from both merged text nodes.\n//\n// @private\n// @param {module:engine/model/element~Element} element Parent element of nodes to merge.\n// @param {Number} index Index between nodes to merge.\nfunction _mergeNodesAtIndex( element, index ) {\n\tconst nodeBefore = element.getChild( index - 1 );\n\tconst nodeAfter = element.getChild( index );\n\n\t// Check if both of those nodes are text objects with same attributes.\n\tif ( nodeBefore && nodeAfter && nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) && _haveSameAttributes( nodeBefore, nodeAfter ) ) {\n\t\t// Append text of text node after index to the before one.\n\t\tconst mergedNode = new Text( nodeBefore.data + nodeAfter.data, nodeBefore.getAttributes() );\n\n\t\t// Remove separate text nodes.\n\t\telement._removeChildren( index - 1, 2 );\n\n\t\t// Insert merged text node.\n\t\telement._insertChild( index - 1, mergedNode );\n\t}\n}\n\n// Checks if given position is in a text node, and if so, splits the text node in two text nodes, each of them\n// containing a part of original text node.\n//\n// @private\n// @param {module:engine/model/position~Position} position Position at which node should be split.\nfunction _splitNodeAtPosition( position ) {\n\tconst textNode = position.textNode;\n\tconst element = position.parent;\n\n\tif ( textNode ) {\n\t\tconst offsetDiff = position.offset - textNode.startOffset;\n\t\tconst index = textNode.index;\n\n\t\telement._removeChildren( index, 1 );\n\n\t\tconst firstPart = new Text( textNode.data.substr( 0, offsetDiff ), textNode.getAttributes() );\n\t\tconst secondPart = new Text( textNode.data.substr( offsetDiff ), textNode.getAttributes() );\n\n\t\telement._insertChild( index, [ firstPart, secondPart ] );\n\t}\n}\n\n// Checks whether two given nodes have same attributes.\n//\n// @private\n// @param {module:engine/model/node~Node} nodeA Node to check.\n// @param {module:engine/model/node~Node} nodeB Node to check.\n// @returns {Boolean} `true` if nodes have same attributes, `false` otherwise.\nfunction _haveSameAttributes( nodeA, nodeB ) {\n\tconst iteratorA = nodeA.getAttributes();\n\tconst iteratorB = nodeB.getAttributes();\n\n\tfor ( const attr of iteratorA ) {\n\t\tif ( attr[ 1 ] !== nodeB.getAttribute( attr[ 0 ] ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\titeratorB.next();\n\t}\n\n\treturn iteratorB.next().done;\n}\n\n/**\n * Value that can be normalized to an array of {@link module:engine/model/node~Node nodes}.\n *\n * Non-arrays are normalized as follows:\n * * {@link module:engine/model/node~Node Node} is left as is,\n * * {@link module:engine/model/textproxy~TextProxy TextProxy} and `String` are normalized to {@link module:engine/model/text~Text Text},\n * * {@link module:engine/model/nodelist~NodeList NodeList} is normalized to an array containing all nodes that are in that node list,\n * * {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment} is normalized to an array containing all of it's\n * * children.\n *\n * Arrays are processed item by item like non-array values and flattened to one array. Normalization always results in\n * a flat array of {@link module:engine/model/node~Node nodes}. Consecutive text nodes (or items normalized to text nodes) will be\n * merged if they have same attributes.\n *\n * @typedef {module:engine/model/node~Node|module:engine/model/textproxy~TextProxy|String|\n * module:engine/model/nodelist~NodeList|module:engine/model/documentfragment~DocumentFragment|Iterable}\n * module:engine/model/node~NodeSet\n */\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\nfunction isEqual(value, other) {\n return baseIsEqual(value, other);\n}\n\nexport default isEqual;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/attributeoperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport { _setAttribute } from './utils';\nimport { isEqual } from 'lodash-es';\n\n/**\n * Operation to change nodes' attribute.\n *\n * Using this class you can add, remove or change value of the attribute.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class AttributeOperation extends Operation {\n\t/**\n\t * Creates an operation that changes, removes or adds attributes.\n\t *\n\t * If only `newValue` is set, attribute will be added on a node. Note that all nodes in operation's range must not\n\t * have an attribute with the same key as the added attribute.\n\t *\n\t * If only `oldValue` is set, then attribute with given key will be removed. Note that all nodes in operation's range\n\t * must have an attribute with that key added.\n\t *\n\t * If both `newValue` and `oldValue` are set, then the operation will change the attribute value. Note that all nodes in\n\t * operation's ranges must already have an attribute with given key and `oldValue` as value\n\t *\n\t * @param {module:engine/model/range~Range} range Range on which the operation should be applied. Must be a flat range.\n\t * @param {String} key Key of an attribute to change or remove.\n\t * @param {*} oldValue Old value of the attribute with given key or `null`, if attribute was not set before.\n\t * @param {*} newValue New value of the attribute with given key or `null`, if operation should remove attribute.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( range, key, oldValue, newValue, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Range on which operation should be applied.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.range = range.clone();\n\n\t\t/**\n\t\t * Key of an attribute to change or remove.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.key = key;\n\n\t\t/**\n\t\t * Old value of the attribute with given key or `null`, if attribute was not set before.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.oldValue = oldValue === undefined ? null : oldValue;\n\n\t\t/**\n\t\t * New value of the attribute with given key or `null`, if operation should remove attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.newValue = newValue === undefined ? null : newValue;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.oldValue === null ) {\n\t\t\treturn 'addAttribute';\n\t\t} else if ( this.newValue === null ) {\n\t\t\treturn 'removeAttribute';\n\t\t} else {\n\t\t\treturn 'changeAttribute';\n\t\t}\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new AttributeOperation( this.range, this.key, this.oldValue, this.newValue, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tgetReversed() {\n\t\treturn new AttributeOperation( this.range, this.key, this.newValue, this.oldValue, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.range = this.range.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( !this.range.isFlat ) {\n\t\t\t/**\n\t\t\t * The range to change is not flat.\n\t\t\t *\n\t\t\t * @error attribute-operation-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'attribute-operation-range-not-flat: The range to change is not flat.', this );\n\t\t}\n\n\t\tfor ( const item of this.range.getItems( { shallow: true } ) ) {\n\t\t\tif ( this.oldValue !== null && !isEqual( item.getAttribute( this.key ), this.oldValue ) ) {\n\t\t\t\t/**\n\t\t\t\t * Changed node has different attribute value than operation's old attribute value.\n\t\t\t\t *\n\t\t\t\t * @error attribute-operation-wrong-old-value\n\t\t\t\t * @param {module:engine/model/item~Item} item\n\t\t\t\t * @param {String} key\n\t\t\t\t * @param {*} value\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'attribute-operation-wrong-old-value: Changed node has different attribute value than operation\\'s ' +\n\t\t\t\t\t'old attribute value.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ item, key: this.key, value: this.oldValue }\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( this.oldValue === null && this.newValue !== null && item.hasAttribute( this.key ) ) {\n\t\t\t\t/**\n\t\t\t\t * The attribute with given key already exists for the given node.\n\t\t\t\t *\n\t\t\t\t * @error attribute-operation-attribute-exists\n\t\t\t\t * @param {module:engine/model/node~Node} node\n\t\t\t\t * @param {String} key\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'attribute-operation-attribute-exists: The attribute with given key already exists.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ node: item, key: this.key }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t// If value to set is same as old value, don't do anything.\n\t\tif ( !isEqual( this.oldValue, this.newValue ) ) {\n\t\t\t// Execution.\n\t\t\t_setAttribute( this.range, this.key, this.newValue );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'AttributeOperation';\n\t}\n\n\t/**\n\t * Creates `AttributeOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new AttributeOperation( Range.fromJSON( json.range, document ), json.key, json.oldValue, json.newValue, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `AttributeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.key }\": ${ JSON.stringify( this.oldValue ) }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` -> ${ JSON.stringify( this.newValue ) }, ${ this.range }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/detachoperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\nimport { _remove } from './utils';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const ModelRange = require( '../range' ).default;\n\n/**\n * Operation to permanently remove node from detached root.\n * Note this operation is only a local operation and won't be send to the other clients.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class DetachOperation extends Operation {\n\t/**\n\t * Creates an insert operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition\n\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t * @param {Number} howMany Offset size of moved range. Moved range will start from `sourcePosition` and end at\n\t * `sourcePosition` with offset shifted by `howMany`.\n\t */\n\tconstructor( sourcePosition, howMany ) {\n\t\tsuper( null );\n\n\t\t/**\n\t\t * Position before the first {@link module:engine/model/item~Item model item} to detach.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} #sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\n\t\t/**\n\t\t * Offset size of moved range.\n\t\t *\n\t\t * @member {Number} #howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'detach';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = this.sourcePosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( this.sourcePosition.root.document ) {\n\t\t\t/**\n\t\t\t * Cannot detach document node.\n\t\t\t *\n\t\t\t * @error detach-operation-on-document-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'detach-operation-on-document-node: Cannot detach document node.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t_remove( Range._createFromPositionAndShift( this.sourcePosition, this.howMany ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'DetachOperation';\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // const range = ModelRange._createFromPositionAndShift( this.sourcePosition, this.howMany );\n\t// @if CK_DEBUG_ENGINE //\tconst nodes = Array.from( range.getItems() );\n\t// @if CK_DEBUG_ENGINE //\tconst nodeString = nodes.length > 1 ? `[ ${ nodes.length } ]` : nodes[ 0 ];\n\n\t// @if CK_DEBUG_ENGINE //\treturn `DetachOperation( ${ this.baseVersion } ): ${ nodeString } -> ${ range }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/moveoperation\n */\n\nimport Operation from './operation';\nimport Position from '../position';\nimport Range from '../range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport { _move } from './utils';\n\n// @if CK_DEBUG_ENGINE // const ModelRange = require( '../range' ).default;\n\n/**\n * Operation to move a range of {@link module:engine/model/item~Item model items}\n * to given {@link module:engine/model/position~Position target position}.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MoveOperation extends Operation {\n\t/**\n\t * Creates a move operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition\n\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t * @param {Number} howMany Offset size of moved range. Moved range will start from `sourcePosition` and end at\n\t * `sourcePosition` with offset shifted by `howMany`.\n\t * @param {module:engine/model/position~Position} targetPosition Position at which moved nodes will be inserted.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( sourcePosition, howMany, targetPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\t\t// `'toNext'` because `sourcePosition` is a bit like a start of the moved range.\n\t\tthis.sourcePosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Offset size of moved range.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/moveoperation~MoveOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position at which moved nodes will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#targetPosition\n\t\t */\n\t\tthis.targetPosition = targetPosition.clone();\n\t\tthis.targetPosition.stickiness = 'toNone';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.targetPosition.root.rootName == '$graveyard' ) {\n\t\t\treturn 'remove';\n\t\t} else if ( this.sourcePosition.root.rootName == '$graveyard' ) {\n\t\t\treturn 'reinsert';\n\t\t}\n\n\t\treturn 'move';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.sourcePosition, this.howMany, this.targetPosition, this.baseVersion );\n\t}\n\n\t/**\n\t * Returns the start position of the moved range after it got moved. This may be different than\n\t * {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition} in some cases, i.e. when a range is moved\n\t * inside the same parent but {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition targetPosition}\n\t * is after {@link module:engine/model/operation/moveoperation~MoveOperation#sourcePosition sourcePosition}.\n\t *\n\t *\t\t vv vv\n\t *\t\tabcdefg ===> adefbcg\n\t *\t\t ^ ^\n\t *\t\t targetPos\tmovedRangeStart\n\t *\t\t offset 6\toffset 4\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetMovedRangeStart() {\n\t\treturn this.targetPosition._getTransformedByDeletion( this.sourcePosition, this.howMany );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tgetReversed() {\n\t\tconst newTargetPosition = this.sourcePosition._getTransformedByInsertion( this.targetPosition, this.howMany );\n\n\t\treturn new this.constructor( this.getMovedRangeStart(), this.howMany, newTargetPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst sourceElement = this.sourcePosition.parent;\n\t\tconst targetElement = this.targetPosition.parent;\n\t\tconst sourceOffset = this.sourcePosition.offset;\n\t\tconst targetOffset = this.targetPosition.offset;\n\n\t\t// Validate whether move operation has correct parameters.\n\t\t// Validation is pretty complex but move operation is one of the core ways to manipulate the document state.\n\t\t// We expect that many errors might be connected with one of scenarios described below.\n\t\tif ( sourceOffset + this.howMany > sourceElement.maxOffset ) {\n\t\t\t/**\n\t\t\t * The nodes which should be moved do not exist.\n\t\t\t *\n\t\t\t * @error move-operation-nodes-do-not-exist\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.', this\n\t\t\t);\n\t\t} else if ( sourceElement === targetElement && sourceOffset < targetOffset && targetOffset < sourceOffset + this.howMany ) {\n\t\t\t/**\n\t\t\t * Trying to move a range of nodes into the middle of that range.\n\t\t\t *\n\t\t\t * @error move-operation-range-into-itself\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-range-into-itself: Trying to move a range of nodes to the inside of that range.', this\n\t\t\t);\n\t\t} else if ( this.sourcePosition.root == this.targetPosition.root ) {\n\t\t\tif ( compareArrays( this.sourcePosition.getParentPath(), this.targetPosition.getParentPath() ) == 'prefix' ) {\n\t\t\t\tconst i = this.sourcePosition.path.length - 1;\n\n\t\t\t\tif ( this.targetPosition.path[ i ] >= sourceOffset && this.targetPosition.path[ i ] < sourceOffset + this.howMany ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Trying to move a range of nodes into one of nodes from that range.\n\t\t\t\t\t *\n\t\t\t\t\t * @error move-operation-node-into-itself\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'move-operation-node-into-itself: Trying to move a range of nodes into one of nodes from that range.', this\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t_move( Range._createFromPositionAndShift( this.sourcePosition, this.howMany ), this.targetPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = this.sourcePosition.toJSON();\n\t\tjson.targetPosition = this.targetPosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MoveOperation';\n\t}\n\n\t/**\n\t * Creates `MoveOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst sourcePosition = Position.fromJSON( json.sourcePosition, document );\n\t\tconst targetPosition = Position.fromJSON( json.targetPosition, document );\n\n\t\treturn new this( sourcePosition, json.howMany, targetPosition, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \tconst range = ModelRange._createFromPositionAndShift( this.sourcePosition, this.howMany );\n\n\t// @if CK_DEBUG_ENGINE //\treturn `MoveOperation( ${ this.baseVersion } ): ${ range } -> ${ this.targetPosition }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/insertoperation\n */\n\nimport Operation from './operation';\nimport Position from '../position';\nimport NodeList from '../nodelist';\nimport MoveOperation from './moveoperation';\nimport { _insert, _normalizeNodes } from './utils';\nimport Text from '../text';\nimport Element from '../element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to insert one or more nodes at given position in the model.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class InsertOperation extends Operation {\n\t/**\n\t * Creates an insert operation.\n\t *\n\t * @param {module:engine/model/position~Position} position Position of insertion.\n\t * @param {module:engine/model/node~NodeSet} nodes The list of nodes to be inserted.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( position, nodes, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position of insertion.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/insertoperation~InsertOperation#position\n\t\t */\n\t\tthis.position = position.clone();\n\t\tthis.position.stickiness = 'toNone';\n\n\t\t/**\n\t\t * List of nodes to insert.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/operation/insertoperation~InsertOperation#nodeList\n\t\t */\n\t\tthis.nodes = new NodeList( _normalizeNodes( nodes ) );\n\n\t\t/**\n\t\t * Flag deciding how the operation should be transformed. If set to `true`, nodes might get additional attributes\n\t\t * during operational transformation. This happens when the operation insertion position is inside of a range\n\t\t * where attributes have changed.\n\t\t *\n\t\t * @member {Boolean} module:engine/model/operation/insertoperation~InsertOperation#shouldReceiveAttributes\n\t\t */\n\t\tthis.shouldReceiveAttributes = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'insert';\n\t}\n\n\t/**\n\t * Total offset size of inserted nodes.\n\t *\n\t * @returns {Number}\n\t */\n\tget howMany() {\n\t\treturn this.nodes.maxOffset;\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/insertoperation~InsertOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\tconst nodes = new NodeList( [ ...this.nodes ].map( node => node._clone( true ) ) );\n\t\tconst insert = new InsertOperation( this.position, nodes, this.baseVersion );\n\n\t\tinsert.shouldReceiveAttributes = this.shouldReceiveAttributes;\n\n\t\treturn insert;\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tgetReversed() {\n\t\tconst graveyard = this.position.root.document.graveyard;\n\t\tconst gyPosition = new Position( graveyard, [ 0 ] );\n\n\t\treturn new MoveOperation( this.position, this.nodes.maxOffset, gyPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst targetElement = this.position.parent;\n\n\t\tif ( !targetElement || targetElement.maxOffset < this.position.offset ) {\n\t\t\t/**\n\t\t\t * Insertion position is invalid.\n\t\t\t *\n\t\t\t * @error insert-operation-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'insert-operation-position-invalid: Insertion position is invalid.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t// What happens here is that we want original nodes be passed to writer because we want original nodes\n\t\t// to be inserted to the model. But in InsertOperation, we want to keep those nodes as they were added\n\t\t// to the operation, not modified. For example, text nodes can get merged or cropped while Elements can\n\t\t// get children. It is important that InsertOperation has the copy of original nodes in intact state.\n\t\tconst originalNodes = this.nodes;\n\t\tthis.nodes = new NodeList( [ ...originalNodes ].map( node => node._clone( true ) ) );\n\n\t\t_insert( this.position, originalNodes );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.position = this.position.toJSON();\n\t\tjson.nodes = this.nodes.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'InsertOperation';\n\t}\n\n\t/**\n\t * Creates `InsertOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/insertoperation~InsertOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst children = [];\n\n\t\tfor ( const child of json.nodes ) {\n\t\t\tif ( child.name ) {\n\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t} else {\n\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t}\n\t\t}\n\n\t\tconst insert = new InsertOperation( Position.fromJSON( json.position, document ), children, json.baseVersion );\n\t\tinsert.shouldReceiveAttributes = json.shouldReceiveAttributes;\n\n\t\treturn insert;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \tconst nodeString = this.nodes.length > 1 ? `[ ${ this.nodes.length } ]` : this.nodes.getNode( 0 );\n\n\t// @if CK_DEBUG_ENGINE //\treturn `InsertOperation( ${ this.baseVersion } ): ${ nodeString } -> ${ this.position }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/markeroperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\n\n/**\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MarkerOperation extends Operation {\n\t/**\n\t * @param {String} name Marker name.\n\t * @param {module:engine/model/range~Range} oldRange Marker range before the change.\n\t * @param {module:engine/model/range~Range} newRange Marker range after the change.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Marker collection on which change should be executed.\n\t * @param {Boolean} affectsData Specifies whether the marker operation affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( name, oldRange, newRange, markers, affectsData, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Marker name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Marker range before the change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.oldRange = oldRange ? oldRange.clone() : null;\n\n\t\t/**\n\t\t * Marker range after the change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.newRange = newRange ? newRange.clone() : null;\n\n\t\t/**\n\t\t * Specifies whether the marker operation affects the data produced by the data pipeline\n\t\t * (is persisted in the editor's data).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.affectsData = affectsData;\n\n\t\t/**\n\t\t * Marker collection on which change should be executed.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis._markers = markers;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'marker';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new MarkerOperation( this.name, this.oldRange, this.newRange, this._markers, this.affectsData, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation}\n\t */\n\tgetReversed() {\n\t\treturn new MarkerOperation( this.name, this.newRange, this.oldRange, this._markers, this.affectsData, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst type = this.newRange ? '_set' : '_remove';\n\n\t\tthis._markers[ type ]( this.name, this.newRange, true, this.affectsData );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tif ( this.oldRange ) {\n\t\t\tjson.oldRange = this.oldRange.toJSON();\n\t\t}\n\n\t\tif ( this.newRange ) {\n\t\t\tjson.newRange = this.newRange.toJSON();\n\t\t}\n\n\t\tdelete json._markers;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MarkerOperation';\n\t}\n\n\t/**\n\t * Creates `MarkerOperation` object from deserialized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new MarkerOperation(\n\t\t\tjson.name,\n\t\t\tjson.oldRange ? Range.fromJSON( json.oldRange, document ) : null,\n\t\t\tjson.newRange ? Range.fromJSON( json.newRange, document ) : null,\n\t\t\tdocument.model.markers,\n\t\t\tjson.affectsData,\n\t\t\tjson.baseVersion\n\t\t);\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `MarkerOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.name }\": ${ this.oldRange } -> ${ this.newRange }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/renameoperation\n */\n\nimport Operation from './operation';\nimport Element from '../element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Position from '../position';\n\n/**\n * Operation to change element's name.\n *\n * Using this class you can change element's name.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class RenameOperation extends Operation {\n\t/**\n\t * Creates an operation that changes element's name.\n\t *\n\t * @param {module:engine/model/position~Position} position Position before an element to change.\n\t * @param {String} oldName Current name of the element.\n\t * @param {String} newName New name for the element.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( position, oldName, newName, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position before an element to change.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/renameoperation~RenameOperation#position\n\t\t */\n\t\tthis.position = position;\n\t\t// This position sticks to the next node because it is a position before the node that we want to change.\n\t\tthis.position.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Current name of the element.\n\t\t *\n\t\t * @member {String} module:engine/model/operation/renameoperation~RenameOperation#oldName\n\t\t */\n\t\tthis.oldName = oldName;\n\n\t\t/**\n\t\t * New name for the element.\n\t\t *\n\t\t * @member {String} module:engine/model/operation/renameoperation~RenameOperation#newName\n\t\t */\n\t\tthis.newName = newName;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'rename';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/renameoperation~RenameOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new RenameOperation( this.position.clone(), this.oldName, this.newName, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/renameoperation~RenameOperation}\n\t */\n\tgetReversed() {\n\t\treturn new RenameOperation( this.position.clone(), this.newName, this.oldName, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst element = this.position.nodeAfter;\n\n\t\tif ( !( element instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Given position is invalid or node after it is not instance of Element.\n\t\t\t *\n\t\t\t * @error rename-operation-wrong-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rename-operation-wrong-position: Given position is invalid or node after it is not an instance of Element.',\n\t\t\t\tthis\n\t\t\t);\n\t\t} else if ( element.name !== this.oldName ) {\n\t\t\t/**\n\t\t\t * Element to change has different name than operation's old name.\n\t\t\t *\n\t\t\t * @error rename-operation-wrong-name\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rename-operation-wrong-name: Element to change has different name than operation\\'s old name.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst element = this.position.nodeAfter;\n\n\t\telement.name = this.newName;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.position = this.position.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'RenameOperation';\n\t}\n\n\t/**\n\t * Creates `RenameOperation` object from deserialized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new RenameOperation( Position.fromJSON( json.position, document ), json.oldName, json.newName, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `RenameOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.position }: \"${ this.oldName }\" -> \"${ this.newName }\"`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/rootattributeoperation\n */\n\nimport Operation from './operation';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to change root element's attribute. Using this class you can add, remove or change value of the attribute.\n *\n * This operation is needed, because root elements can't be changed through\n * @link module:engine/model/operation/attributeoperation~AttributeOperation}.\n * It is because {@link module:engine/model/operation/attributeoperation~AttributeOperation}\n * requires a range to change and root element can't\n * be a part of range because every {@link module:engine/model/position~Position} has to be inside a root.\n * {@link module:engine/model/position~Position} can't be created before a root element.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class RootAttributeOperation extends Operation {\n\t/**\n\t * Creates an operation that changes, removes or adds attributes on root element.\n\t *\n\t * @see module:engine/model/operation/attributeoperation~AttributeOperation\n\t * @param {module:engine/model/rootelement~RootElement} root Root element to change.\n\t * @param {String} key Key of an attribute to change or remove.\n\t * @param {*} oldValue Old value of the attribute with given key or `null` if adding a new attribute.\n\t * @param {*} newValue New value to set for the attribute. If `null`, then the operation just removes the attribute.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( root, key, oldValue, newValue, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Root element to change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/rootelement~RootElement}\n\t\t */\n\t\tthis.root = root;\n\n\t\t/**\n\t\t * Key of an attribute to change or remove.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.key = key;\n\n\t\t/**\n\t\t * Old value of the attribute with given key or `null` if adding a new attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.oldValue = oldValue;\n\n\t\t/**\n\t\t * New value to set for the attribute. If `null`, then the operation just removes the attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.newValue = newValue;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.oldValue === null ) {\n\t\t\treturn 'addRootAttribute';\n\t\t} else if ( this.newValue === null ) {\n\t\t\treturn 'removeRootAttribute';\n\t\t} else {\n\t\t\treturn 'changeRootAttribute';\n\t\t}\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new RootAttributeOperation( this.root, this.key, this.oldValue, this.newValue, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation}\n\t */\n\tgetReversed() {\n\t\treturn new RootAttributeOperation( this.root, this.key, this.newValue, this.oldValue, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( this.root != this.root.root || this.root.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * The element to change is not a root element.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-not-a-root\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t * @param {*} value\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-not-a-root: The element to change is not a root element.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\n\t\tif ( this.oldValue !== null && this.root.getAttribute( this.key ) !== this.oldValue ) {\n\t\t\t/**\n\t\t\t * The attribute which should be removed does not exists for the given node.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-wrong-old-value\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t * @param {*} value\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-wrong-old-value: Changed node has different attribute value than operation\\'s ' +\n\t\t\t\t'old attribute value.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\n\t\tif ( this.oldValue === null && this.newValue !== null && this.root.hasAttribute( this.key ) ) {\n\t\t\t/**\n\t\t\t * The attribute with given key already exists for the given node.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-attribute-exists\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-attribute-exists: The attribute with given key already exists.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tif ( this.newValue !== null ) {\n\t\t\tthis.root._setAttribute( this.key, this.newValue );\n\t\t} else {\n\t\t\tthis.root._removeAttribute( this.key );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.root = this.root.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'RootAttributeOperation';\n\t}\n\n\t/**\n\t * Creates RootAttributeOperation object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tif ( !document.getRoot( json.root ) ) {\n\t\t\t/**\n\t\t\t * Cannot create RootAttributeOperation for document. Root with specified name does not exist.\n\t\t\t *\n\t\t\t * @error rootattributeoperation-fromjson-no-root\n\t\t\t * @param {String} rootName\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-fromjson-no-root: Cannot create RootAttributeOperation. Root with specified name does not exist.',\n\t\t\t\tthis,\n\t\t\t\t{ rootName: json.root }\n\t\t\t);\n\t\t}\n\n\t\treturn new RootAttributeOperation( document.getRoot( json.root ), json.key, json.oldValue, json.newValue, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `RootAttributeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.key }\": ${ JSON.stringify( this.oldValue ) }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` -> ${ JSON.stringify( this.newValue ) }, ${ this.root.rootName }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/mergeoperation\n */\n\nimport Operation from './operation';\nimport SplitOperation from './splitoperation';\nimport Position from '../position';\nimport Range from '../range';\nimport { _move } from './utils';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to merge two {@link module:engine/model/element~Element elements}.\n *\n * The merged element is the parent of {@link ~MergeOperation#sourcePosition} and it is merged into the parent of\n * {@link ~MergeOperation#targetPosition}. All nodes from the merged element are moved to {@link ~MergeOperation#targetPosition}.\n *\n * The merged element is moved to the graveyard at {@link ~MergeOperation#graveyardPosition}.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MergeOperation extends Operation {\n\t/**\n\t * Creates a merge operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition Position inside the merged element. All nodes from that\n\t * element after that position will be moved to {@link ~#targetPosition}.\n\t * @param {Number} howMany Summary offset size of nodes which will be moved from the merged element to the new parent.\n\t * @param {module:engine/model/position~Position} targetPosition Position which the nodes from the merged elements will be moved to.\n\t * @param {module:engine/model/position~Position} graveyardPosition Position in graveyard to which the merged element will be moved.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( sourcePosition, howMany, targetPosition, graveyardPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position inside the merged element. All nodes from that element after that position will be moved to {@link ~#targetPosition}.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\t\t// This is, and should always remain, the first position in its parent.\n\t\tthis.sourcePosition.stickiness = 'toPrevious';\n\n\t\t/**\n\t\t * Summary offset size of nodes which will be moved from the merged element to the new parent.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/mergeoperation~MergeOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position which the nodes from the merged elements will be moved to.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#targetPosition\n\t\t */\n\t\tthis.targetPosition = targetPosition.clone();\n\t\t// Except of a rare scenario in `MergeOperation` x `MergeOperation` transformation,\n\t\t// this is, and should always remain, the last position in its parent.\n\t\tthis.targetPosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Position in graveyard to which the merged element will be moved.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#graveyardPosition\n\t\t */\n\t\tthis.graveyardPosition = graveyardPosition.clone();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'merge';\n\t}\n\n\t/**\n\t * Position before the merged element (which will be deleted).\n\t *\n\t * @readonly\n\t * @type {module:engine/model/position~Position}\n\t */\n\tget deletionPosition() {\n\t\treturn new Position( this.sourcePosition.root, this.sourcePosition.path.slice( 0, -1 ) );\n\t}\n\n\t/**\n\t * Artificial range that contains all the nodes from the merged element that will be moved to {@link ~MergeOperation#sourcePosition}.\n\t * The range starts at {@link ~MergeOperation#sourcePosition} and ends in the same parent, at `POSITIVE_INFINITY` offset.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/range~Range}\n\t */\n\tget movedRange() {\n\t\tconst end = this.sourcePosition.getShiftedBy( Number.POSITIVE_INFINITY );\n\n\t\treturn new Range( this.sourcePosition, end );\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.sourcePosition, this.howMany, this.targetPosition, this.graveyardPosition, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation}\n\t */\n\tgetReversed() {\n\t\t// Positions in this method are transformed by this merge operation because the split operation bases on\n\t\t// the context after this merge operation happened (because split operation reverses it).\n\t\t// So we need to acknowledge that the merge operation happened and those positions changed a little.\n\t\tconst targetPosition = this.targetPosition._getTransformedByMergeOperation( this );\n\n\t\tconst path = this.sourcePosition.path.slice( 0, -1 );\n\t\tconst insertionPosition = new Position( this.sourcePosition.root, path )._getTransformedByMergeOperation( this );\n\n\t\tconst split = new SplitOperation( targetPosition, this.howMany, this.graveyardPosition, this.baseVersion + 1 );\n\t\tsplit.insertionPosition = insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst sourceElement = this.sourcePosition.parent;\n\t\tconst targetElement = this.targetPosition.parent;\n\n\t\t// Validate whether merge operation has correct parameters.\n\t\tif ( !sourceElement.parent ) {\n\t\t\t/**\n\t\t\t * Merge source position is invalid. The element to be merged must have a parent node.\n\t\t\t *\n\t\t\t * @error merge-operation-source-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-source-position-invalid: Merge source position is invalid.', this );\n\t\t} else if ( !targetElement.parent ) {\n\t\t\t/**\n\t\t\t * Merge target position is invalid. The element to be merged must have a parent node.\n\t\t\t *\n\t\t\t * @error merge-operation-target-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-target-position-invalid: Merge target position is invalid.', this );\n\t\t} else if ( this.howMany != sourceElement.maxOffset ) {\n\t\t\t/**\n\t\t\t * Merge operation specifies wrong number of nodes to move.\n\t\t\t *\n\t\t\t * @error merge-operation-how-many-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-how-many-invalid: Merge operation specifies wrong number of nodes to move.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst mergedElement = this.sourcePosition.parent;\n\t\tconst sourceRange = Range._createIn( mergedElement );\n\n\t\t_move( sourceRange, this.targetPosition );\n\t\t_move( Range._createOn( mergedElement ), this.graveyardPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = json.sourcePosition.toJSON();\n\t\tjson.targetPosition = json.targetPosition.toJSON();\n\t\tjson.graveyardPosition = json.graveyardPosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MergeOperation';\n\t}\n\n\t/**\n\t * Creates `MergeOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst sourcePosition = Position.fromJSON( json.sourcePosition, document );\n\t\tconst targetPosition = Position.fromJSON( json.targetPosition, document );\n\t\tconst graveyardPosition = Position.fromJSON( json.graveyardPosition, document );\n\n\t\treturn new this( sourcePosition, json.howMany, targetPosition, graveyardPosition, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `MergeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.sourcePosition } -> ${ this.targetPosition }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` ( ${ this.howMany } ), ${ this.graveyardPosition }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/splitoperation\n */\n\nimport Operation from './operation';\nimport MergeOperation from './mergeoperation';\nimport Position from '../position';\nimport Range from '../range';\nimport { _insert, _move } from './utils';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to split {@link module:engine/model/element~Element an element} at given\n * {@link module:engine/model/operation/splitoperation~SplitOperation#splitPosition split position} into two elements,\n * both containing a part of the element's original content.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class SplitOperation extends Operation {\n\t/**\n\t * Creates a split operation.\n\t *\n\t * @param {module:engine/model/position~Position} splitPosition Position at which an element should be split.\n\t * @param {Number} howMany Total offset size of elements that are in the split element after `position`.\n\t * @param {module:engine/model/position~Position|null} graveyardPosition Position in the graveyard root before the element which\n\t * should be used as a parent of the nodes after `position`. If it is not set, a copy of the the `position` parent will be used.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( splitPosition, howMany, graveyardPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position at which an element should be split.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/splitoperation~SplitOperation#splitPosition\n\t\t */\n\t\tthis.splitPosition = splitPosition.clone();\n\t\t// Keep position sticking to the next node. This way any new content added at the place where the element is split\n\t\t// will be left in the original element.\n\t\tthis.splitPosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Total offset size of elements that are in the split element after `position`.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/splitoperation~SplitOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position at which the clone of split element (or element from graveyard) will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/splitoperation~SplitOperation#insertionPosition\n\t\t */\n\t\tthis.insertionPosition = SplitOperation.getInsertionPosition( splitPosition );\n\t\tthis.insertionPosition.stickiness = 'toNone';\n\n\t\t/**\n\t\t * Position in the graveyard root before the element which should be used as a parent of the nodes after `position`.\n\t\t * If it is not set, a copy of the the `position` parent will be used.\n\t\t *\n\t\t * The default behavior is to clone the split element. Element from graveyard is used during undo.\n\t\t *\n\t\t * @member {module:engine/model/position~Position|null} #graveyardPosition\n\t\t */\n\t\tthis.graveyardPosition = graveyardPosition ? graveyardPosition.clone() : null;\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\tthis.graveyardPosition.stickiness = 'toNext';\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'split';\n\t}\n\n\t/**\n\t * Position inside the new clone of a split element.\n\t *\n\t * This is a position where nodes that are after the split position will be moved to.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/position~Position}\n\t */\n\tget moveTargetPosition() {\n\t\tconst path = this.insertionPosition.path.slice();\n\t\tpath.push( 0 );\n\n\t\treturn new Position( this.insertionPosition.root, path );\n\t}\n\n\t/**\n\t * Artificial range that contains all the nodes from the split element that will be moved to the new element.\n\t * The range starts at {@link ~#splitPosition} and ends in the same parent, at `POSITIVE_INFINITY` offset.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/range~Range}\n\t */\n\tget movedRange() {\n\t\tconst end = this.splitPosition.getShiftedBy( Number.POSITIVE_INFINITY );\n\n\t\treturn new Range( this.splitPosition, end );\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\tconst split = new this.constructor( this.splitPosition, this.howMany, this.graveyardPosition, this.baseVersion );\n\t\tsplit.insertionPosition = this.insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation}\n\t */\n\tgetReversed() {\n\t\tconst graveyard = this.splitPosition.root.document.graveyard;\n\t\tconst graveyardPosition = new Position( graveyard, [ 0 ] );\n\n\t\treturn new MergeOperation( this.moveTargetPosition, this.howMany, this.splitPosition, graveyardPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst element = this.splitPosition.parent;\n\t\tconst offset = this.splitPosition.offset;\n\n\t\t// Validate whether split operation has correct parameters.\n\t\tif ( !element || element.maxOffset < offset ) {\n\t\t\t/**\n\t\t\t * Split position is invalid.\n\t\t\t *\n\t\t\t * @error split-operation-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-position-invalid: Split position is invalid.', this );\n\t\t} else if ( !element.parent ) {\n\t\t\t/**\n\t\t\t * Cannot split root element.\n\t\t\t *\n\t\t\t * @error split-operation-split-in-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-split-in-root: Cannot split root element.', this );\n\t\t} else if ( this.howMany != element.maxOffset - this.splitPosition.offset ) {\n\t\t\t/**\n\t\t\t * Split operation specifies wrong number of nodes to move.\n\t\t\t *\n\t\t\t * @error split-operation-how-many-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-how-many-invalid: Split operation specifies wrong number of nodes to move.', this );\n\t\t} else if ( this.graveyardPosition && !this.graveyardPosition.nodeAfter ) {\n\t\t\t/**\n\t\t\t * Graveyard position invalid.\n\t\t\t *\n\t\t\t * @error split-operation-graveyard-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-graveyard-position-invalid: Graveyard position invalid.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst splitElement = this.splitPosition.parent;\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\t_move( Range._createFromPositionAndShift( this.graveyardPosition, 1 ), this.insertionPosition );\n\t\t} else {\n\t\t\tconst newElement = splitElement._clone();\n\n\t\t\t_insert( this.insertionPosition, newElement );\n\t\t}\n\n\t\tconst sourceRange = new Range(\n\t\t\tPosition._createAt( splitElement, this.splitPosition.offset ),\n\t\t\tPosition._createAt( splitElement, splitElement.maxOffset )\n\t\t);\n\n\t\t_move( sourceRange, this.moveTargetPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.splitPosition = this.splitPosition.toJSON();\n\t\tjson.insertionPosition = this.insertionPosition.toJSON();\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\tjson.graveyardPosition = this.graveyardPosition.toJSON();\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'SplitOperation';\n\t}\n\n\t/**\n\t * Helper function that returns a default insertion position basing on given `splitPosition`. The default insertion\n\t * position is after the split element.\n\t *\n\t * @param {module:engine/model/position~Position} splitPosition\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic getInsertionPosition( splitPosition ) {\n\t\tconst path = splitPosition.path.slice( 0, -1 );\n\t\tpath[ path.length - 1 ]++;\n\n\t\treturn new Position( splitPosition.root, path );\n\t}\n\n\t/**\n\t * Creates `SplitOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst splitPosition = Position.fromJSON( json.splitPosition, document );\n\t\tconst insertionPosition = Position.fromJSON( json.insertionPosition, document );\n\t\tconst graveyardPosition = json.graveyardPosition ? Position.fromJSON( json.graveyardPosition, document ) : null;\n\n\t\tconst split = new this( splitPosition, json.howMany, graveyardPosition, json.baseVersion );\n\t\tsplit.insertionPosition = insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `SplitOperation( ${ this.baseVersion } ): ${ this.splitPosition } ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`( ${ this.howMany } ) -> ${ this.insertionPosition }` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.graveyardPosition ? ' with ' + this.graveyardPosition : '' }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/rootelement\n */\n\nimport Element from './element';\n\n/**\n * Type of {@link module:engine/model/element~Element} that is a root of a model tree.\n * @extends module:engine/model/element~Element\n */\nexport default class RootElement extends Element {\n\t/**\n\t * Creates root element.\n\t *\n\t * @param {module:engine/model/document~Document} doc Document that is an owner of this root.\n\t * @param {String} name Node name.\n\t * @param {String} [rootName='main'] Unique root name used to identify this root\n\t * element by {@link module:engine/model/document~Document}.\n\t */\n\tconstructor( doc, name, rootName = 'main' ) {\n\t\tsuper( name );\n\n\t\t/**\n\t\t * Document that is an owner of this root.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/document~Document}\n\t\t */\n\t\tthis._doc = doc;\n\n\t\t/**\n\t\t * Unique root name used to identify this root element by {@link module:engine/model/document~Document}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.rootName = rootName;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns this root element.\n\t *\n\t * In contrary, to {@link module:engine/model/node~Node node}, root element always have a `document`.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this._doc;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trootElement.is( 'rootElement' ); // -> true\n\t *\t\trootElement.is( 'element' ); // -> true\n\t *\t\trootElement.is( 'node' ); // -> true\n\t *\t\trootElement.is( 'model:rootElement' ); // -> true\n\t *\t\trootElement.is( 'model:element' ); // -> true\n\t *\t\trootElement.is( 'model:node' ); // -> true\n\t *\n\t *\t\trootElement.is( 'view:element' ); // -> false\n\t *\t\trootElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/model/element~Element#name name}:\n\t *\n\t *\t\trootElement.is( '$root' ); // -> true if this is a $root element\n\t *\t\trootElement.is( 'rootElement', '$root' ); // -> same as above\n\t *\t\ttext.is( '$root' ); -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name ) {\n\t\tconst cutType = type.replace( 'model:', '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'rootElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'rootElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Converts `RootElement` instance to `String` containing it's name.\n\t *\n\t * @returns {String} `RootElement` instance converted to `String`.\n\t */\n\ttoJSON() {\n\t\treturn this.rootName;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn this.rootName;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelRootElement: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/writer\n */\n\nimport AttributeOperation from './operation/attributeoperation';\nimport DetachOperation from './operation/detachoperation';\nimport InsertOperation from './operation/insertoperation';\nimport MarkerOperation from './operation/markeroperation';\nimport MoveOperation from './operation/moveoperation';\nimport RenameOperation from './operation/renameoperation';\nimport RootAttributeOperation from './operation/rootattributeoperation';\nimport SplitOperation from './operation/splitoperation';\nimport MergeOperation from './operation/mergeoperation';\n\nimport DocumentFragment from './documentfragment';\nimport Text from './text';\nimport Element from './element';\nimport RootElement from './rootelement';\nimport Position from './position';\nimport Range from './range.js';\nimport DocumentSelection from './documentselection';\n\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The model can only be modified by using the writer. It should be used whenever you want to create a node, modify\n * child nodes, attributes or text, set the selection's position and its attributes.\n *\n * The instance of the writer is only available in the {@link module:engine/model/model~Model#change `change()`} or\n * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()`}.\n *\n *\t\tmodel.change( writer => {\n *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n *\t\t} );\n *\n * Note that the writer should never be stored and used outside of the `change()` and\n * `enqueueChange()` blocks.\n *\n * Note that writer's methods do not check the {@link module:engine/model/schema~Schema}. It is possible\n * to create incorrect model structures by using the writer. Read more about in\n * {@glink framework/guides/deep-dive/schema#who-checks-the-schema \"Who checks the schema?\"}.\n *\n * @see module:engine/model/model~Model#change\n * @see module:engine/model/model~Model#enqueueChange\n */\nexport default class Writer {\n\t/**\n\t * Creates a writer instance.\n\t *\n\t * **Note:** It is not recommended to use it directly. Use {@link module:engine/model/model~Model#change `Model#change()`} or\n\t * {@link module:engine/model/model~Model#enqueueChange `Model#enqueueChange()`} instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/model~Model} model\n\t * @param {module:engine/model/batch~Batch} batch\n\t */\n\tconstructor( model, batch ) {\n\t\t/**\n\t\t * Instance of the model on which this writer operates.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The batch to which this writer will add changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/batch~Batch}\n\t\t */\n\t\tthis.batch = batch;\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/text~Text text node}.\n\t *\n\t *\t\twriter.createText( 'foo' );\n\t *\t\twriter.createText( 'foo', { bold: true } );\n\t *\n\t * @param {String} data Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @returns {module:engine/model/text~Text} Created text node.\n\t */\n\tcreateText( data, attributes ) {\n\t\treturn new Text( data, attributes );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/element~Element element}.\n\t *\n\t *\t\twriter.createElement( 'paragraph' );\n\t *\t\twriter.createElement( 'paragraph', { alignment: 'center' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/model/element~Element} Created element.\n\t */\n\tcreateElement( name, attributes ) {\n\t\treturn new Element( name, attributes );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Created document fragment.\n\t */\n\tcreateDocumentFragment() {\n\t\treturn new DocumentFragment();\n\t}\n\n\t/**\n\t * Inserts item on given position.\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.insert( paragraph, position );\n\t *\n\t * Instead of using position you can use parent and offset:\n\t *\n\t *\t\tconst text = writer.createText( 'foo' );\n\t *\t\twriter.insert( text, paragraph, 5 );\n\t *\n\t * You can also use `end` instead of the offset to insert at the end:\n\t *\n\t *\t\tconst text = writer.createText( 'foo' );\n\t *\t\twriter.insert( text, paragraph, 'end' );\n\t *\n\t * Or insert before or after another element:\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.insert( paragraph, anotherParagraph, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * Note that if the item already has parent it will be removed from the previous parent.\n\t *\n\t * Note that you cannot re-insert a node from a document to a different document or a document fragment. In this case,\n\t * `model-writer-insert-forbidden-move` is thrown.\n\t *\n\t * If you want to move {@link module:engine/model/range~Range range} instead of an\n\t * {@link module:engine/model/item~Item item} use {@link module:engine/model/writer~Writer#move `Writer#move()`}.\n\t *\n\t * **Note:** For a paste-like content insertion mechanism see\n\t * {@link module:engine/model/model~Model#insertContent `model.insertContent()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/documentfragment~DocumentFragment} item Item or document\n\t * fragment to insert.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * second parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsert( item, itemOrPosition, offset = 0 ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( item instanceof Text && item.data == '' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = Position._createAt( itemOrPosition, offset );\n\n\t\t// If item has a parent already.\n\t\tif ( item.parent ) {\n\t\t\t// We need to check if item is going to be inserted within the same document.\n\t\t\tif ( isSameTree( item.root, position.root ) ) {\n\t\t\t\t// If it's we just need to move it.\n\t\t\t\tthis.move( Range._createOn( item ), position );\n\n\t\t\t\treturn;\n\t\t\t}\n\t\t\t// If it isn't the same root.\n\t\t\telse {\n\t\t\t\tif ( item.root.document ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Cannot move a node from a document to a different tree.\n\t\t\t\t\t * It is forbidden to move a node that was already in a document outside of it.\n\t\t\t\t\t *\n\t\t\t\t\t * @error model-writer-insert-forbidden-move\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'model-writer-insert-forbidden-move: ' +\n\t\t\t\t\t\t'Cannot move a node from a document to a different tree. ' +\n\t\t\t\t\t\t'It is forbidden to move a node that was already in a document outside of it.',\n\t\t\t\t\t\tthis\n\t\t\t\t\t);\n\t\t\t\t} else {\n\t\t\t\t\t// Move between two different document fragments or from document fragment to a document is possible.\n\t\t\t\t\t// In that case, remove the item from it's original parent.\n\t\t\t\t\tthis.remove( item );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tconst version = position.root.document ? position.root.document.version : null;\n\n\t\tconst insert = new InsertOperation( position, item, version );\n\n\t\tif ( item instanceof Text ) {\n\t\t\tinsert.shouldReceiveAttributes = true;\n\t\t}\n\n\t\tthis.batch.addOperation( insert );\n\t\tthis.model.applyOperation( insert );\n\n\t\t// When element is a DocumentFragment we need to move its markers to Document#markers.\n\t\tif ( item instanceof DocumentFragment ) {\n\t\t\tfor ( const [ markerName, markerRange ] of item.markers ) {\n\t\t\t\t// We need to migrate marker range from DocumentFragment to Document.\n\t\t\t\tconst rangeRootPosition = Position._createAt( markerRange.root, 0 );\n\t\t\t\tconst range = new Range(\n\t\t\t\t\tmarkerRange.start._getCombined( rangeRootPosition, position ),\n\t\t\t\t\tmarkerRange.end._getCombined( rangeRootPosition, position )\n\t\t\t\t);\n\n\t\t\t\tconst options = { range, usingOperation: true, affectsData: true };\n\n\t\t\t\tif ( this.model.markers.has( markerName ) ) {\n\t\t\t\t\tthis.updateMarker( markerName, options );\n\t\t\t\t} else {\n\t\t\t\t\tthis.addMarker( markerName, options );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates and inserts text on given position. You can optionally set text attributes:\n\t *\n\t *\t\twriter.insertText( 'foo', position );\n\t *\t\twriter.insertText( 'foo', { bold: true }, position );\n\t *\n\t * Instead of using position you can use parent and offset or define that text should be inserted at the end\n\t * or before or after other node:\n\t *\n\t *\t\t// Inserts 'foo' in paragraph, at offset 5:\n\t *\t\twriter.insertText( 'foo', paragraph, 5 );\n\t *\t\t// Inserts 'foo' at the end of a paragraph:\n\t *\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t// Inserts 'foo' after an image:\n\t *\t\twriter.insertText( 'foo', image, 'after' );\n\t *\n\t * These parameters work in the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * @param {String} data Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * third parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsertText( text, attributes, itemOrPosition, offset ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element || attributes instanceof Position ) {\n\t\t\tthis.insert( this.createText( text ), attributes, itemOrPosition );\n\t\t} else {\n\t\t\tthis.insert( this.createText( text, attributes ), itemOrPosition, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and inserts element on given position. You can optionally set attributes:\n\t *\n\t *\t\twriter.insertElement( 'paragraph', position );\n\t *\t\twriter.insertElement( 'paragraph', { alignment: 'center' }, position );\n\t *\n\t * Instead of using position you can use parent and offset or define that text should be inserted at the end\n\t * or before or after other node:\n\t *\n\t *\t\t// Inserts paragraph in the root at offset 5:\n\t *\t\twriter.insertElement( 'paragraph', root, 5 );\n\t *\t\t// Inserts paragraph at the end of a blockquote:\n\t *\t\twriter.insertElement( 'paragraph', blockquote, 'end' );\n\t *\t\t// Inserts after an image:\n\t *\t\twriter.insertElement( 'paragraph', image, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * third parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsertElement( name, attributes, itemOrPosition, offset ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element || attributes instanceof Position ) {\n\t\t\tthis.insert( this.createElement( name ), attributes, itemOrPosition );\n\t\t} else {\n\t\t\tthis.insert( this.createElement( name, attributes ), itemOrPosition, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Inserts item at the end of the given parent.\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.append( paragraph, root );\n\t *\n\t * Note that if the item already has parent it will be removed from the previous parent.\n\t *\n\t * If you want to move {@link module:engine/model/range~Range range} instead of an\n\t * {@link module:engine/model/item~Item item} use {@link module:engine/model/writer~Writer#move `Writer#move()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/documentfragment~DocumentFragment}\n\t * item Item or document fragment to insert.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappend( item, parent ) {\n\t\tthis.insert( item, parent, 'end' );\n\t}\n\n\t/**\n\t * Creates text node and inserts it at the end of the parent. You can optionally set text attributes:\n\t *\n\t *\t\twriter.appendText( 'foo', paragraph );\n\t *\t\twriter.appendText( 'foo', { bold: true }, paragraph );\n\t *\n\t * @param {String} text Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappendText( text, attributes, parent ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element ) {\n\t\t\tthis.insert( this.createText( text ), attributes, 'end' );\n\t\t} else {\n\t\t\tthis.insert( this.createText( text, attributes ), parent, 'end' );\n\t\t}\n\t}\n\n\t/**\n\t * Creates element and inserts it at the end of the parent. You can optionally set attributes:\n\t *\n\t *\t\twriter.appendElement( 'paragraph', root );\n\t *\t\twriter.appendElement( 'paragraph', { alignment: 'center' }, root );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappendElement( name, attributes, parent ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element ) {\n\t\t\tthis.insert( this.createElement( name ), attributes, 'end' );\n\t\t} else {\n\t\t\tthis.insert( this.createElement( name, attributes ), parent, 'end' );\n\t\t}\n\t}\n\n\t/**\n\t * Sets value of the attribute with given key on a {@link module:engine/model/item~Item model item}\n\t * or on a {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {*} value Attribute new value.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range on which the attribute will be set.\n\t */\n\tsetAttribute( key, value, itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( itemOrRange instanceof Range ) {\n\t\t\tconst ranges = itemOrRange.getMinimalFlatRanges();\n\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tsetAttributeOnRange( this, key, value, range );\n\t\t\t}\n\t\t} else {\n\t\t\tsetAttributeOnItem( this, key, value, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Sets values of attributes on a {@link module:engine/model/item~Item model item}\n\t * or on a {@link module:engine/model/range~Range range}.\n\t *\n\t *\t\twriter.setAttributes( {\n\t *\t\t\tbold: true,\n\t *\t\t\titalic: true\n\t *\t\t}, range );\n\t *\n\t * @param {Object} attributes Attributes keys and values.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range on which the attributes will be set.\n\t */\n\tsetAttributes( attributes, itemOrRange ) {\n\t\tfor ( const [ key, val ] of toMap( attributes ) ) {\n\t\t\tthis.setAttribute( key, val, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Removes an attribute with given key from a {@link module:engine/model/item~Item model item}\n\t * or from a {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range from which the attribute will be removed.\n\t */\n\tremoveAttribute( key, itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( itemOrRange instanceof Range ) {\n\t\t\tconst ranges = itemOrRange.getMinimalFlatRanges();\n\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tsetAttributeOnRange( this, key, null, range );\n\t\t\t}\n\t\t} else {\n\t\t\tsetAttributeOnItem( this, key, null, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Removes all attributes from all elements in the range or from the given item.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range from which all attributes will be removed.\n\t */\n\tclearAttributes( itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst removeAttributesFromItem = item => {\n\t\t\tfor ( const attribute of item.getAttributeKeys() ) {\n\t\t\t\tthis.removeAttribute( attribute, item );\n\t\t\t}\n\t\t};\n\n\t\tif ( !( itemOrRange instanceof Range ) ) {\n\t\t\tremoveAttributesFromItem( itemOrRange );\n\t\t} else {\n\t\t\tfor ( const item of itemOrRange.getItems() ) {\n\t\t\t\tremoveAttributesFromItem( item );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Moves all items in the source range to the target position.\n\t *\n\t *\t\twriter.move( sourceRange, targetPosition );\n\t *\n\t * Instead of the target position you can use parent and offset or define that range should be moved to the end\n\t * or before or after chosen item:\n\t *\n\t *\t\t// Moves all items in the range to the paragraph at offset 5:\n\t *\t\twriter.move( sourceRange, paragraph, 5 );\n\t *\t\t// Moves all items in the range to the end of a blockquote:\n\t *\t\twriter.move( sourceRange, blockquote, 'end' );\n\t *\t\t// Moves all items in the range to a position after an image:\n\t *\t\twriter.move( sourceRange, image, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * Note that items can be moved only within the same tree. It means that you can move items within the same root\n\t * (element or document fragment) or between {@link module:engine/model/document~Document#roots documents roots},\n\t * but you can not move items from document fragment to the document or from one detached element to another. Use\n\t * {@link module:engine/model/writer~Writer#insert} in such cases.\n\t *\n\t * @param {module:engine/model/range~Range} range Source range.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * second parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tmove( range, itemOrPosition, offset ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !( range instanceof Range ) ) {\n\t\t\t/**\n\t\t\t * Invalid range to move.\n\t\t\t *\n\t\t\t * @error writer-move-invalid-range\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-invalid-range: Invalid range to move.', this );\n\t\t}\n\n\t\tif ( !range.isFlat ) {\n\t\t\t/**\n\t\t\t * Range to move is not flat.\n\t\t\t *\n\t\t\t * @error writer-move-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-range-not-flat: Range to move is not flat.', this );\n\t\t}\n\n\t\tconst position = Position._createAt( itemOrPosition, offset );\n\n\t\t// Do not move anything if the move target is same as moved range start.\n\t\tif ( position.isEqual( range.start ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\tthis._addOperationForAffectedMarkers( 'move', range );\n\n\t\tif ( !isSameTree( range.root, position.root ) ) {\n\t\t\t/**\n\t\t\t * Range is going to be moved within not the same document. Please use\n\t\t\t * {@link module:engine/model/writer~Writer#insert insert} instead.\n\t\t\t *\n\t\t\t * @error writer-move-different-document\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-different-document: Range is going to be moved between different documents.', this );\n\t\t}\n\n\t\tconst version = range.root.document ? range.root.document.version : null;\n\t\tconst operation = new MoveOperation( range.start, range.end.offset - range.start.offset, position, version );\n\n\t\tthis.batch.addOperation( operation );\n\t\tthis.model.applyOperation( operation );\n\t}\n\n\t/**\n\t * Removes given model {@link module:engine/model/item~Item item} or {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange Model item or range to remove.\n\t */\n\tremove( itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst rangeToRemove = itemOrRange instanceof Range ? itemOrRange : Range._createOn( itemOrRange );\n\t\tconst ranges = rangeToRemove.getMinimalFlatRanges().reverse();\n\n\t\tfor ( const flat of ranges ) {\n\t\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\t\tthis._addOperationForAffectedMarkers( 'move', flat );\n\n\t\t\tapplyRemoveOperation( flat.start, flat.end.offset - flat.start.offset, this.batch, this.model );\n\t\t}\n\t}\n\n\t/**\n\t * Merges two siblings at the given position.\n\t *\n\t * Node before and after the position have to be an element. Otherwise `writer-merge-no-element-before` or\n\t * `writer-merge-no-element-after` error will be thrown.\n\t *\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\tmerge( position ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst nodeBefore = position.nodeBefore;\n\t\tconst nodeAfter = position.nodeAfter;\n\n\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\tthis._addOperationForAffectedMarkers( 'merge', position );\n\n\t\tif ( !( nodeBefore instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Node before merge position must be an element.\n\t\t\t *\n\t\t\t * @error writer-merge-no-element-before\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-merge-no-element-before: Node before merge position must be an element.', this );\n\t\t}\n\n\t\tif ( !( nodeAfter instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Node after merge position must be an element.\n\t\t\t *\n\t\t\t * @error writer-merge-no-element-after\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-merge-no-element-after: Node after merge position must be an element.', this );\n\t\t}\n\n\t\tif ( !position.root.document ) {\n\t\t\tthis._mergeDetached( position );\n\t\t} else {\n\t\t\tthis._merge( position );\n\t\t}\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionFromPath `Model#createPositionFromPath()`}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionFromPath( root, path, stickiness ) {\n\t\treturn this.model.createPositionFromPath( root, path, stickiness );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionAt `Model#createPositionAt()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn this.model.createPositionAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionAfter `Model#createPositionAfter()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn this.model.createPositionAfter( item );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionBefore `Model#createPositionBefore()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn this.model.createPositionBefore( item );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRange `Model#createRange()`}.\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn this.model.createRange( start, end );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRangeIn `Model#createRangeIn()`}.\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn this.model.createRangeIn( element );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRangeOn `Model#createRangeOn()`}.\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeOn( element ) {\n\t\treturn this.model.createRangeOn( element );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createSelection `Model#createSelection()`}.\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @returns {module:engine/model/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn this.model.createSelection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Performs merge action in a detached tree.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\t_mergeDetached( position ) {\n\t\tconst nodeBefore = position.nodeBefore;\n\t\tconst nodeAfter = position.nodeAfter;\n\n\t\tthis.move( Range._createIn( nodeAfter ), Position._createAt( nodeBefore, 'end' ) );\n\t\tthis.remove( nodeAfter );\n\t}\n\n\t/**\n\t * Performs merge action in a non-detached tree.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\t_merge( position ) {\n\t\tconst targetPosition = Position._createAt( position.nodeBefore, 'end' );\n\t\tconst sourcePosition = Position._createAt( position.nodeAfter, 0 );\n\n\t\tconst graveyard = position.root.document.graveyard;\n\t\tconst graveyardPosition = new Position( graveyard, [ 0 ] );\n\n\t\tconst version = position.root.document.version;\n\n\t\tconst merge = new MergeOperation( sourcePosition, position.nodeAfter.maxOffset, targetPosition, graveyardPosition, version );\n\n\t\tthis.batch.addOperation( merge );\n\t\tthis.model.applyOperation( merge );\n\t}\n\n\t/**\n\t * Renames the given element.\n\t *\n\t * @param {module:engine/model/element~Element} element The element to rename.\n\t * @param {String} newName New element name.\n\t */\n\trename( element, newName ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !( element instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Trying to rename an object which is not an instance of Element.\n\t\t\t *\n\t\t\t * @error writer-rename-not-element-instance\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-rename-not-element-instance: Trying to rename an object which is not an instance of Element.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst version = element.root.document ? element.root.document.version : null;\n\t\tconst renameOperation = new RenameOperation( Position._createBefore( element ), element.name, newName, version );\n\n\t\tthis.batch.addOperation( renameOperation );\n\t\tthis.model.applyOperation( renameOperation );\n\t}\n\n\t/**\n\t * Splits elements starting from the given position and going to the top of the model tree as long as given\n\t * `limitElement` is reached. When `limitElement` is not defined then only the parent of the given position will be split.\n\t *\n\t * The element needs to have a parent. It cannot be a root element nor a document fragment.\n\t * The `writer-split-element-no-parent` error will be thrown if you try to split an element with no parent.\n\t *\n\t * @param {module:engine/model/position~Position} position Position of split.\n\t * @param {module:engine/model/node~Node} [limitElement] Stop splitting when this element will be reached.\n\t * @returns {Object} result Split result.\n\t * @returns {module:engine/model/position~Position} result.position Position between split elements.\n\t * @returns {module:engine/model/range~Range} result.range Range that stars from the end of the first split element and ends\n\t * at the beginning of the first copy element.\n\t */\n\tsplit( position, limitElement ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tlet splitElement = position.parent;\n\n\t\tif ( !splitElement.parent ) {\n\t\t\t/**\n\t\t\t * Element with no parent can not be split.\n\t\t\t *\n\t\t\t * @error writer-split-element-no-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-split-element-no-parent: Element with no parent can not be split.', this );\n\t\t}\n\n\t\t// When limit element is not defined lets set splitElement parent as limit.\n\t\tif ( !limitElement ) {\n\t\t\tlimitElement = splitElement.parent;\n\t\t}\n\n\t\tif ( !position.parent.getAncestors( { includeSelf: true } ).includes( limitElement ) ) {\n\t\t\tthrow new CKEditorError( 'writer-split-invalid-limit-element: Limit element is not a position ancestor.', this );\n\t\t}\n\n\t\t// We need to cache elements that will be created as a result of the first split because\n\t\t// we need to create a range from the end of the first split element to the beginning of the\n\t\t// first copy element. This should be handled by LiveRange but it doesn't work on detached nodes.\n\t\tlet firstSplitElement, firstCopyElement;\n\n\t\tdo {\n\t\t\tconst version = splitElement.root.document ? splitElement.root.document.version : null;\n\t\t\tconst howMany = splitElement.maxOffset - position.offset;\n\t\t\tconst split = new SplitOperation( position, howMany, null, version );\n\n\t\t\tthis.batch.addOperation( split );\n\t\t\tthis.model.applyOperation( split );\n\n\t\t\t// Cache result of the first split.\n\t\t\tif ( !firstSplitElement && !firstCopyElement ) {\n\t\t\t\tfirstSplitElement = splitElement;\n\t\t\t\tfirstCopyElement = position.parent.nextSibling;\n\t\t\t}\n\n\t\t\tposition = this.createPositionAfter( position.parent );\n\t\t\tsplitElement = position.parent;\n\t\t} while ( splitElement !== limitElement );\n\n\t\treturn {\n\t\t\tposition,\n\t\t\trange: new Range( Position._createAt( firstSplitElement, 'end' ), Position._createAt( firstCopyElement, 0 ) )\n\t\t};\n\t}\n\n\t/**\n\t * Wraps the given range with the given element or with a new element (if a string was passed).\n\t *\n\t * **Note:** range to wrap should be a \"flat range\" (see {@link module:engine/model/range~Range#isFlat `Range#isFlat`}).\n\t * If not, an error will be thrown.\n\t *\n\t * @param {module:engine/model/range~Range} range Range to wrap.\n\t * @param {module:engine/model/element~Element|String} elementOrString Element or name of element to wrap the range with.\n\t */\n\twrap( range, elementOrString ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !range.isFlat ) {\n\t\t\t/**\n\t\t\t * Range to wrap is not flat.\n\t\t\t *\n\t\t\t * @error writer-wrap-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-range-not-flat: Range to wrap is not flat.', this );\n\t\t}\n\n\t\tconst element = elementOrString instanceof Element ? elementOrString : new Element( elementOrString );\n\n\t\tif ( element.childCount > 0 ) {\n\t\t\t/**\n\t\t\t * Element to wrap with is not empty.\n\t\t\t *\n\t\t\t * @error writer-wrap-element-not-empty\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-element-not-empty: Element to wrap with is not empty.', this );\n\t\t}\n\n\t\tif ( element.parent !== null ) {\n\t\t\t/**\n\t\t\t * Element to wrap with is already attached to a tree model.\n\t\t\t *\n\t\t\t * @error writer-wrap-element-attached\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-element-attached: Element to wrap with is already attached to tree model.', this );\n\t\t}\n\n\t\tthis.insert( element, range.start );\n\n\t\t// Shift the range-to-wrap because we just inserted an element before that range.\n\t\tconst shiftedRange = new Range( range.start.getShiftedBy( 1 ), range.end.getShiftedBy( 1 ) );\n\n\t\tthis.move( shiftedRange, Position._createAt( element, 0 ) );\n\t}\n\n\t/**\n\t * Unwraps children of the given element – all its children are moved before it and then the element is removed.\n\t * Throws error if you try to unwrap an element which does not have a parent.\n\t *\n\t * @param {module:engine/model/element~Element} element Element to unwrap.\n\t */\n\tunwrap( element ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( element.parent === null ) {\n\t\t\t/**\n\t\t\t * Trying to unwrap an element which has no parent.\n\t\t\t *\n\t\t\t * @error writer-unwrap-element-no-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-unwrap-element-no-parent: Trying to unwrap an element which has no parent.', this );\n\t\t}\n\n\t\tthis.move( Range._createIn( element ), this.createPositionAfter( element ) );\n\t\tthis.remove( element );\n\t}\n\n\t/**\n\t * Adds a {@link module:engine/model/markercollection~Marker marker}. Marker is a named range, which tracks\n\t * changes in the document and updates its range automatically, when model tree changes.\n\t *\n\t * As the first parameter you can set marker name.\n\t *\n\t * The required `options.usingOperation` parameter lets you decide if the marker should be managed by operations or not. See\n\t * {@link module:engine/model/markercollection~Marker marker class description} to learn about the difference between\n\t * markers managed by operations and not-managed by operations.\n\t *\n\t * The `options.affectsData` parameter, which defaults to `false`, allows you to define if a marker affects the data. It should be\n\t * `true` when the marker change changes the data returned by the\n\t * {@link module:core/editor/utils/dataapimixin~DataApi#getData `editor.getData()`} method.\n\t * When set to `true` it fires the {@link module:engine/model/document~Document#event:change:data `change:data`} event.\n\t * When set to `false` it fires the {@link module:engine/model/document~Document#event:change `change`} event.\n\t *\n\t * Create marker directly base on marker's name:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: false } );\n\t *\n\t * Create marker using operation:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: true } );\n\t *\n\t * Create marker that affects the editor data:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: false, affectsData: true } );\n\t *\n\t * Note: For efficiency reasons, it's best to create and keep as little markers as possible.\n\t *\n\t * @see module:engine/model/markercollection~Marker\n\t * @param {String} name Name of a marker to create - must be unique.\n\t * @param {Object} options\n\t * @param {Boolean} options.usingOperation Flag indicating that the marker should be added by MarkerOperation.\n\t * See {@link module:engine/model/markercollection~Marker#managedUsingOperations}.\n\t * @param {module:engine/model/range~Range} options.range Marker range.\n\t * @param {Boolean} [options.affectsData=false] Flag indicating that the marker changes the editor data.\n\t * @returns {module:engine/model/markercollection~Marker} Marker that was set.\n\t */\n\taddMarker( name, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !options || typeof options.usingOperation != 'boolean' ) {\n\t\t\t/**\n\t\t\t * The `options.usingOperation` parameter is required when adding a new marker.\n\t\t\t *\n\t\t\t * @error writer-addMarker-no-usingOperation\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-addMarker-no-usingOperation: The options.usingOperation parameter is required when adding a new marker.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst usingOperation = options.usingOperation;\n\t\tconst range = options.range;\n\t\tconst affectsData = options.affectsData === undefined ? false : options.affectsData;\n\n\t\tif ( this.model.markers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Marker with provided name already exists.\n\t\t\t *\n\t\t\t * @error writer-addMarker-marker-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-addMarker-marker-exists: Marker with provided name already exists.', this );\n\t\t}\n\n\t\tif ( !range ) {\n\t\t\t/**\n\t\t\t * Range parameter is required when adding a new marker.\n\t\t\t *\n\t\t\t * @error writer-addMarker-no-range\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-addMarker-no-range: Range parameter is required when adding a new marker.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tif ( !usingOperation ) {\n\t\t\treturn this.model.markers._set( name, range, usingOperation, affectsData );\n\t\t}\n\n\t\tapplyMarkerOperation( this, name, null, range, affectsData );\n\n\t\treturn this.model.markers.get( name );\n\t}\n\n\t/**\n\t * Adds, updates or refreshes a {@link module:engine/model/markercollection~Marker marker}. Marker is a named range, which tracks\n\t * changes in the document and updates its range automatically, when model tree changes. Still, it is possible to change the\n\t * marker's range directly using this method.\n\t *\n\t * As the first parameter you can set marker name or instance. If none of them is provided, new marker, with a unique\n\t * name is created and returned.\n\t *\n\t * As the second parameter you can set the new marker data or leave this parameter as empty which will just refresh\n\t * the marker by triggering downcast conversion for it. Refreshing the marker is useful when you want to change\n\t * the marker {@link module:engine/view/element~Element view element} without changing any marker data.\n\t *\n\t * \t\tlet isCommentActive = false;\n\t *\n\t * \t\tmodel.conversion.markerToHighlight( {\n\t * \t\t\tmodel: 'comment',\n\t *\t\t\tview: data => {\n\t *\t\t\t\tconst classes = [ 'comment-marker' ];\n\t *\n\t *\t\t\t\tif ( isCommentActive ) {\n\t *\t\t\t\t\tclasses.push( 'comment-marker--active' );\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\treturn { classes };\n\t *\t\t\t}\n\t * \t\t} );\n\t *\n\t * \t\t// Change the property that indicates if marker is displayed as active or not.\n\t * \t\tisCommentActive = true;\n\t *\n\t * \t\t// And refresh the marker to convert it with additional class.\n\t * \t\tmodel.change( writer => writer.updateMarker( 'comment' ) );\n\t *\n\t * The `options.usingOperation` parameter lets you change if the marker should be managed by operations or not. See\n\t * {@link module:engine/model/markercollection~Marker marker class description} to learn about the difference between\n\t * markers managed by operations and not-managed by operations. It is possible to change this option for an existing marker.\n\t *\n\t * The `options.affectsData` parameter, which defaults to `false`, allows you to define if a marker affects the data. It should be\n\t * `true` when the marker change changes the data returned by\n\t * the {@link module:core/editor/utils/dataapimixin~DataApi#getData `editor.getData()`} method.\n\t * When set to `true` it fires the {@link module:engine/model/document~Document#event:change:data `change:data`} event.\n\t * When set to `false` it fires the {@link module:engine/model/document~Document#event:change `change`} event.\n\t *\n\t * Update marker directly base on marker's name:\n\t *\n\t *\t\tupdateMarker( markerName, { range } );\n\t *\n\t * Update marker using operation:\n\t *\n\t *\t\tupdateMarker( marker, { range, usingOperation: true } );\n\t *\t\tupdateMarker( markerName, { range, usingOperation: true } );\n\t *\n\t * Change marker's option (start using operations to manage it):\n\t *\n\t *\t\tupdateMarker( marker, { usingOperation: true } );\n\t *\n\t * Change marker's option (inform the engine, that the marker does not affect the data anymore):\n\t *\n\t *\t\tupdateMarker( markerName, { affectsData: false } );\n\t *\n\t * @see module:engine/model/markercollection~Marker\n\t * @param {String|module:engine/model/markercollection~Marker} markerOrName Name of a marker to update, or a marker instance.\n\t * @param {Object} [options] If options object is not defined then marker will be refreshed by triggering\n\t * downcast conversion for this marker with the same data.\n\t * @param {module:engine/model/range~Range} [options.range] Marker range to update.\n\t * @param {Boolean} [options.usingOperation] Flag indicated whether the marker should be added by MarkerOperation.\n\t * See {@link module:engine/model/markercollection~Marker#managedUsingOperations}.\n\t * @param {Boolean} [options.affectsData] Flag indicating that the marker changes the editor data.\n\t */\n\tupdateMarker( markerOrName, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst markerName = typeof markerOrName == 'string' ? markerOrName : markerOrName.name;\n\t\tconst currentMarker = this.model.markers.get( markerName );\n\n\t\tif ( !currentMarker ) {\n\t\t\t/**\n\t\t\t * Marker with provided name does not exists.\n\t\t\t *\n\t\t\t * @error writer-updateMarker-marker-not-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-updateMarker-marker-not-exists: Marker with provided name does not exists.', this );\n\t\t}\n\n\t\tif ( !options ) {\n\t\t\tthis.model.markers._refresh( currentMarker );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst hasUsingOperationDefined = typeof options.usingOperation == 'boolean';\n\t\tconst affectsDataDefined = typeof options.affectsData == 'boolean';\n\n\t\t// Use previously defined marker's affectsData if the property is not provided.\n\t\tconst affectsData = affectsDataDefined ? options.affectsData : currentMarker.affectsData;\n\n\t\tif ( !hasUsingOperationDefined && !options.range && !affectsDataDefined ) {\n\t\t\t/**\n\t\t\t * One of the options is required - provide range, usingOperations or affectsData.\n\t\t\t *\n\t\t\t * @error writer-updateMarker-wrong-options\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-updateMarker-wrong-options: One of the options is required - provide range, usingOperations or affectsData.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst currentRange = currentMarker.getRange();\n\t\tconst updatedRange = options.range ? options.range : currentRange;\n\n\t\tif ( hasUsingOperationDefined && options.usingOperation !== currentMarker.managedUsingOperations ) {\n\t\t\t// The marker type is changed so it's necessary to create proper operations.\n\t\t\tif ( options.usingOperation ) {\n\t\t\t\t// If marker changes to a managed one treat this as synchronizing existing marker.\n\t\t\t\t// Create `MarkerOperation` with `oldRange` set to `null`, so reverse operation will remove the marker.\n\t\t\t\tapplyMarkerOperation( this, markerName, null, updatedRange, affectsData );\n\t\t\t} else {\n\t\t\t\t// If marker changes to a marker that do not use operations then we need to create additional operation\n\t\t\t\t// that removes that marker first.\n\t\t\t\tapplyMarkerOperation( this, markerName, currentRange, null, affectsData );\n\n\t\t\t\t// Although not managed the marker itself should stay in model and its range should be preserver or changed to passed range.\n\t\t\t\tthis.model.markers._set( markerName, updatedRange, undefined, affectsData );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Marker's type doesn't change so update it accordingly.\n\t\tif ( currentMarker.managedUsingOperations ) {\n\t\t\tapplyMarkerOperation( this, markerName, currentRange, updatedRange, affectsData );\n\t\t} else {\n\t\t\tthis.model.markers._set( markerName, updatedRange, undefined, affectsData );\n\t\t}\n\t}\n\n\t/**\n\t * Removes given {@link module:engine/model/markercollection~Marker marker} or marker with given name.\n\t * The marker is removed accordingly to how it has been created, so if the marker was created using operation,\n\t * it will be destroyed using operation.\n\t *\n\t * @param {module:engine/model/markercollection~Marker|String} markerOrName Marker or marker name to remove.\n\t */\n\tremoveMarker( markerOrName ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst name = typeof markerOrName == 'string' ? markerOrName : markerOrName.name;\n\n\t\tif ( !this.model.markers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Trying to remove marker which does not exist.\n\t\t\t *\n\t\t\t * @error writer-removeMarker-no-marker\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-removeMarker-no-marker: Trying to remove marker which does not exist.', this );\n\t\t}\n\n\t\tconst marker = this.model.markers.get( name );\n\n\t\tif ( !marker.managedUsingOperations ) {\n\t\t\tthis.model.markers._remove( name );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst oldRange = marker.getRange();\n\n\t\tapplyMarkerOperation( this, name, oldRange, null, marker.affectsData );\n\t}\n\n\t/**\n\t * Sets the document's selection (ranges and direction) to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable} or creates an empty selection if no arguments were passed.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\twriter.setSelection( otherSelection );\n\t *\n\t *\t\t// Sets selection to the given document selection.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\twriter.setSelection( documentSelection );\n\t *\n\t *\t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPosition( root, path );\n\t *\t\twriter.setSelection( position );\n\t *\n\t *\t\t// Sets collapsed selection at the position of the given node and an offset.\n\t *\t\twriter.setSelection( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'on' );\n\t *\n\t *\t\t// Removes all selection's ranges.\n\t *\t\twriter.setSelection( null );\n\t *\n\t * `Writer#setSelection()` allow passing additional options (`backward`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\twriter.setSelection( range, { backward: true } );\n\t *\n\t * Throws `writer-incorrect-use` error when the writer is used outside the `change()` block.\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tsetSelection( selectable, placeOrOffset, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tthis.model.document.selection._setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/documentselection~DocumentSelection#focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link #createPositionAt `writer.createPositionAt()`} parameters.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset=0] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tsetSelectionFocus( itemOrPosition, offset ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tthis.model.document.selection._setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Sets attribute(s) on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * Using key and value pair:\n\t *\n\t * \twriter.setSelectionAttribute( 'italic', true );\n\t *\n\t * Using key-value object:\n\t *\n\t * \twriter.setSelectionAttribute( { italic: true, bold: false } );\n\t *\n\t * Using iterable object:\n\t *\n\t * \twriter.setSelectionAttribute( new Map( [ [ 'italic', true ] ] ) );\n\t *\n\t * @param {String|Object|Iterable.<*>} keyOrObjectOrIterable Key of the attribute to set\n\t * or object / iterable of key => value attribute pairs.\n\t * @param {*} [value] Attribute value.\n\t */\n\tsetSelectionAttribute( keyOrObjectOrIterable, value ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( typeof keyOrObjectOrIterable === 'string' ) {\n\t\t\tthis._setSelectionAttribute( keyOrObjectOrIterable, value );\n\t\t} else {\n\t\t\tfor ( const [ key, value ] of toMap( keyOrObjectOrIterable ) ) {\n\t\t\t\tthis._setSelectionAttribute( key, value );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes attribute(s) with given key(s) from the selection.\n\t *\n\t * Remove one attribute:\n\t *\n\t *\t\twriter.removeSelectionAttribute( 'italic' );\n\t *\n\t * Remove multiple attributes:\n\t *\n\t *\t\twriter.removeSelectionAttribute( [ 'italic', 'bold' ] );\n\t *\n\t * @param {String|Iterable.<String>} keyOrIterableOfKeys Key of the attribute to remove or an iterable of attribute keys to remove.\n\t */\n\tremoveSelectionAttribute( keyOrIterableOfKeys ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( typeof keyOrIterableOfKeys === 'string' ) {\n\t\t\tthis._removeSelectionAttribute( keyOrIterableOfKeys );\n\t\t} else {\n\t\t\tfor ( const key of keyOrIterableOfKeys ) {\n\t\t\t\tthis._removeSelectionAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Temporarily changes the {@link module:engine/model/documentselection~DocumentSelection#isGravityOverridden gravity}\n\t * of the selection from left to right.\n\t *\n\t * The gravity defines from which direction the selection inherits its attributes. If it's the default left gravity,\n\t * then the selection (after being moved by the user) inherits attributes from its left-hand side.\n\t * This method allows to temporarily override this behavior by forcing the gravity to the right.\n\t *\n\t * For the following model fragment:\n\t *\n\t *\t\t<$text bold=\"true\" linkHref=\"url\">bar[]</$text><$text bold=\"true\">biz</$text>\n\t *\n\t * * Default gravity: selection will have the `bold` and `linkHref` attributes.\n\t * * Overridden gravity: selection will have `bold` attribute.\n\t *\n\t * **Note**: It returns an unique identifier which is required to restore the gravity. It guarantees the symmetry\n\t * of the process.\n\t *\n\t * @returns {String} The unique id which allows restoring the gravity.\n\t */\n\toverrideSelectionGravity() {\n\t\treturn this.model.document.selection._overrideGravity();\n\t}\n\n\t/**\n\t * Restores {@link ~Writer#overrideSelectionGravity} gravity to default.\n\t *\n\t * Restoring the gravity is only possible using the unique identifier returned by\n\t * {@link ~Writer#overrideSelectionGravity}. Note that the gravity remains overridden as long as won't be restored\n\t * the same number of times it was overridden.\n\t *\n\t * @param {String} uid The unique id returned by {@link ~Writer#overrideSelectionGravity}.\n\t */\n\trestoreSelectionGravity( uid ) {\n\t\tthis.model.document.selection._restoreGravity( uid );\n\t}\n\n\t/**\n\t * @private\n\t * @param {String} key Key of the attribute to remove.\n\t * @param {*} value Attribute value.\n\t */\n\t_setSelectionAttribute( key, value ) {\n\t\tconst selection = this.model.document.selection;\n\n\t\t// Store attribute in parent element if the selection is collapsed in an empty node.\n\t\tif ( selection.isCollapsed && selection.anchor.parent.isEmpty ) {\n\t\t\tconst storeKey = DocumentSelection._getStoreAttributeKey( key );\n\n\t\t\tthis.setAttribute( storeKey, value, selection.anchor.parent );\n\t\t}\n\n\t\tselection._setAttribute( key, value );\n\t}\n\n\t/**\n\t * @private\n\t * @param {String} key Key of the attribute to remove.\n\t */\n\t_removeSelectionAttribute( key ) {\n\t\tconst selection = this.model.document.selection;\n\n\t\t// Remove stored attribute from parent element if the selection is collapsed in an empty node.\n\t\tif ( selection.isCollapsed && selection.anchor.parent.isEmpty ) {\n\t\t\tconst storeKey = DocumentSelection._getStoreAttributeKey( key );\n\n\t\t\tthis.removeAttribute( storeKey, selection.anchor.parent );\n\t\t}\n\n\t\tselection._removeAttribute( key );\n\t}\n\n\t/**\n\t * Throws `writer-detached-writer-tries-to-modify-model` error when the writer is used outside of the `change()` block.\n\t *\n\t * @private\n\t */\n\t_assertWriterUsedCorrectly() {\n\t\t/**\n\t\t * Trying to use a writer outside a {@link module:engine/model/model~Model#change `change()`} or\n\t\t * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()`} blocks.\n\t\t *\n\t\t * The writer can only be used inside these blocks which ensures that the model\n\t\t * can only be changed during such \"sessions\".\n\t\t *\n\t\t * @error writer-incorrect-use\n\t\t */\n\t\tif ( this.model._currentWriter !== this ) {\n\t\t\tthrow new CKEditorError( 'writer-incorrect-use: Trying to use a writer outside the change() block.', this );\n\t\t}\n\t}\n\n\t/**\n\t * For given action `type` and `positionOrRange` where the action happens, this function finds all affected markers\n\t * and applies a marker operation with the new marker range equal to the current range. Thanks to this, the marker range\n\t * can be later correctly processed during undo.\n\t *\n\t * @private\n\t * @param {'move'|'merge'} type Writer action type.\n\t * @param {module:engine/model/position~Position|module:engine/model/range~Range} positionOrRange Position or range\n\t * where the writer action happens.\n\t */\n\t_addOperationForAffectedMarkers( type, positionOrRange ) {\n\t\tfor ( const marker of this.model.markers ) {\n\t\t\tif ( !marker.managedUsingOperations ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst markerRange = marker.getRange();\n\t\t\tlet isAffected = false;\n\n\t\t\tif ( type == 'move' ) {\n\t\t\t\tisAffected =\n\t\t\t\t\tpositionOrRange.containsPosition( markerRange.start ) ||\n\t\t\t\t\tpositionOrRange.start.isEqual( markerRange.start ) ||\n\t\t\t\t\tpositionOrRange.containsPosition( markerRange.end ) ||\n\t\t\t\t\tpositionOrRange.end.isEqual( markerRange.end );\n\t\t\t} else {\n\t\t\t\t// if type == 'merge'.\n\t\t\t\tconst elementBefore = positionOrRange.nodeBefore;\n\t\t\t\tconst elementAfter = positionOrRange.nodeAfter;\n\n\t\t\t\t// Start: <p>Foo[</p><p>Bar]</p>\n\t\t\t\t// After merge: <p>Foo[Bar]</p>\n\t\t\t\t// After undoing split: <p>Foo</p><p>[Bar]</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedInLeftElement = markerRange.start.parent == elementBefore && markerRange.start.isAtEnd;\n\n\t\t\t\t// Start: <p>[Foo</p><p>]Bar</p>\n\t\t\t\t// After merge: <p>[Foo]Bar</p>\n\t\t\t\t// After undoing split: <p>[Foo]</p><p>Bar</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedInRightElement = markerRange.end.parent == elementAfter && markerRange.end.offset == 0;\n\n\t\t\t\t// Start: <p>[Foo</p>]<p>Bar</p>\n\t\t\t\t// After merge: <p>[Foo]Bar</p>\n\t\t\t\t// After undoing split: <p>[Foo]</p><p>Bar</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedAfterLeftElement = markerRange.end.nodeAfter == elementAfter;\n\n\t\t\t\t// Start: <p>Foo</p>[<p>Bar]</p>\n\t\t\t\t// After merge: <p>Foo[Bar]</p>\n\t\t\t\t// After undoing split: <p>Foo</p><p>[Bar]</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedBeforeRightElement = markerRange.start.nodeAfter == elementAfter;\n\n\t\t\t\tisAffected = affectedInLeftElement || affectedInRightElement || affectedAfterLeftElement || affectedBeforeRightElement;\n\t\t\t}\n\n\t\t\tif ( isAffected ) {\n\t\t\t\tthis.updateMarker( marker.name, { range: markerRange } );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Sets given attribute to each node in given range. When attribute value is null then attribute will be removed.\n//\n// Because attribute operation needs to have the same attribute value on the whole range, this function splits\n// the range into smaller parts.\n//\n// Given `range` must be flat.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} key Attribute key.\n// @param {*} value Attribute new value.\n// @param {module:engine/model/range~Range} range Model range on which the attribute will be set.\nfunction setAttributeOnRange( writer, key, value, range ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\n\t// Position of the last split, the beginning of the new range.\n\tlet lastSplitPosition = range.start;\n\n\t// Currently position in the scanning range. Because we need value after the position, it is not a current\n\t// position of the iterator but the previous one (we need to iterate one more time to get the value after).\n\tlet position;\n\n\t// Value before the currently position.\n\tlet valueBefore;\n\n\t// Value after the currently position.\n\tlet valueAfter;\n\n\tfor ( const val of range.getWalker( { shallow: true } ) ) {\n\t\tvalueAfter = val.item.getAttribute( key );\n\n\t\t// At the first run of the iterator the position in undefined. We also do not have a valueBefore, but\n\t\t// because valueAfter may be null, valueBefore may be equal valueAfter ( undefined == null ).\n\t\tif ( position && valueBefore != valueAfter ) {\n\t\t\t// if valueBefore == value there is nothing to change, so we add operation only if these values are different.\n\t\t\tif ( valueBefore != value ) {\n\t\t\t\taddOperation();\n\t\t\t}\n\n\t\t\tlastSplitPosition = position;\n\t\t}\n\n\t\tposition = val.nextPosition;\n\t\tvalueBefore = valueAfter;\n\t}\n\n\t// Because position in the loop is not the iterator position (see let position comment), the last position in\n\t// the while loop will be last but one position in the range. We need to check the last position manually.\n\tif ( position instanceof Position && position != lastSplitPosition && valueBefore != value ) {\n\t\taddOperation();\n\t}\n\n\tfunction addOperation() {\n\t\tconst range = new Range( lastSplitPosition, position );\n\t\tconst version = range.root.document ? doc.version : null;\n\t\tconst operation = new AttributeOperation( range, key, valueBefore, value, version );\n\n\t\twriter.batch.addOperation( operation );\n\t\tmodel.applyOperation( operation );\n\t}\n}\n\n// Sets given attribute to the given node. When attribute value is null then attribute will be removed.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} key Attribute key.\n// @param {*} value Attribute new value.\n// @param {module:engine/model/item~Item} item Model item on which the attribute will be set.\nfunction setAttributeOnItem( writer, key, value, item ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\tconst previousValue = item.getAttribute( key );\n\tlet range, operation;\n\n\tif ( previousValue != value ) {\n\t\tconst isRootChanged = item.root === item;\n\n\t\tif ( isRootChanged ) {\n\t\t\t// If we change attributes of root element, we have to use `RootAttributeOperation`.\n\t\t\tconst version = item.document ? doc.version : null;\n\n\t\t\toperation = new RootAttributeOperation( item, key, previousValue, value, version );\n\t\t} else {\n\t\t\trange = new Range( Position._createBefore( item ), writer.createPositionAfter( item ) );\n\n\t\t\tconst version = range.root.document ? doc.version : null;\n\n\t\t\toperation = new AttributeOperation( range, key, previousValue, value, version );\n\t\t}\n\n\t\twriter.batch.addOperation( operation );\n\t\tmodel.applyOperation( operation );\n\t}\n}\n\n// Creates and applies marker operation to {@link module:engine/model/operation/operation~Operation operation}.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} name Marker name.\n// @param {module:engine/model/range~Range} oldRange Marker range before the change.\n// @param {module:engine/model/range~Range} newRange Marker range after the change.\n// @param {Boolean} affectsData\nfunction applyMarkerOperation( writer, name, oldRange, newRange, affectsData ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\n\tconst operation = new MarkerOperation( name, oldRange, newRange, model.markers, affectsData, doc.version );\n\n\twriter.batch.addOperation( operation );\n\tmodel.applyOperation( operation );\n}\n\n// Creates `MoveOperation` or `DetachOperation` that removes `howMany` nodes starting from `position`.\n// The operation will be applied on given model instance and added to given operation instance.\n//\n// @private\n// @param {module:engine/model/position~Position} position Position from which nodes are removed.\n// @param {Number} howMany Number of nodes to remove.\n// @param {Batch} batch Batch to which the operation will be added.\n// @param {module:engine/model/model~Model} model Model instance on which operation will be applied.\nfunction applyRemoveOperation( position, howMany, batch, model ) {\n\tlet operation;\n\n\tif ( position.root.document ) {\n\t\tconst doc = model.document;\n\t\tconst graveyardPosition = new Position( doc.graveyard, [ 0 ] );\n\n\t\toperation = new MoveOperation( position, howMany, graveyardPosition, doc.version );\n\t} else {\n\t\toperation = new DetachOperation( position, howMany );\n\t}\n\n\tbatch.addOperation( operation );\n\tmodel.applyOperation( operation );\n}\n\n// Returns `true` if both root elements are the same element or both are documents root elements.\n//\n// Elements in the same tree can be moved (for instance you can move element form one documents root to another, or\n// within the same document fragment), but when element supposed to be moved from document fragment to the document, or\n// to another document it should be removed and inserted to avoid problems with OT. This is because features like undo or\n// collaboration may track changes on the document but ignore changes on detached fragments and should not get\n// unexpected `move` operation.\nfunction isSameTree( rootA, rootB ) {\n\t// If it is the same root this is the same tree.\n\tif ( rootA === rootB ) {\n\t\treturn true;\n\t}\n\n\t// If both roots are documents root it is operation within the document what we still treat as the same tree.\n\tif ( rootA instanceof RootElement && rootB instanceof RootElement ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/differ\n */\n\nimport Position from './position';\nimport Range from './range';\n\n/**\n * Calculates the difference between two model states.\n *\n * Receives operations that are to be applied on the model document. Marks parts of the model document tree which\n * are changed and saves the state of these elements before the change. Then, it compares saved elements with the\n * changed elements, after all changes are applied on the model document. Calculates the diff between saved\n * elements and new ones and returns a change set.\n */\nexport default class Differ {\n\t/**\n\t * Creates a `Differ` instance.\n\t *\n\t * @param {module:engine/model/markercollection~MarkerCollection} markerCollection Model's marker collection.\n\t */\n\tconstructor( markerCollection ) {\n\t\t/**\n\t\t * Reference to the model's marker collection.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis._markerCollection = markerCollection;\n\n\t\t/**\n\t\t * A map that stores changes that happened in a given element.\n\t\t *\n\t\t * The keys of the map are references to the model elements.\n\t\t * The values of the map are arrays with changes that were done on this element.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._changesInElement = new Map();\n\n\t\t/**\n\t\t * A map that stores \"element's children snapshots\". A snapshot is representing children of a given element before\n\t\t * the first change was applied on that element. Snapshot items are objects with two properties: `name`,\n\t\t * containing the element name (or `'$text'` for a text node) and `attributes` which is a map of the node's attributes.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._elementSnapshots = new Map();\n\n\t\t/**\n\t\t * A map that stores all changed markers.\n\t\t *\n\t\t * The keys of the map are marker names.\n\t\t * The values of the map are objects with the `oldRange` and `newRange` properties. They store the marker range\n\t\t * state before and after the change.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._changedMarkers = new Map();\n\n\t\t/**\n\t\t * Stores the number of changes that were processed. Used to order the changes chronologically. It is important\n\t\t * when changes are sorted.\n\t\t *\n\t\t * @private\n\t\t * @type {Number}\n\t\t */\n\t\tthis._changeCount = 0;\n\n\t\t/**\n\t\t * For efficiency purposes, `Differ` stores the change set returned by the differ after {@link #getChanges} call.\n\t\t * Cache is reset each time a new operation is buffered. If the cache has not been reset, {@link #getChanges} will\n\t\t * return the cached value instead of calculating it again.\n\t\t *\n\t\t * This property stores those changes that did not take place in graveyard root.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Object>|null}\n\t\t */\n\t\tthis._cachedChanges = null;\n\n\t\t/**\n\t\t * For efficiency purposes, `Differ` stores the change set returned by the differ after the {@link #getChanges} call.\n\t\t * The cache is reset each time a new operation is buffered. If the cache has not been reset, {@link #getChanges} will\n\t\t * return the cached value instead of calculating it again.\n\t\t *\n\t\t * This property stores all changes evaluated by `Differ`, including those that took place in the graveyard.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Object>|null}\n\t\t */\n\t\tthis._cachedChangesWithGraveyard = null;\n\t}\n\n\t/**\n\t * Informs whether there are any changes buffered in `Differ`.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this._changesInElement.size == 0 && this._changedMarkers.size == 0;\n\t}\n\n\t/**\n\t * Marks given `item` in differ to be \"refreshed\". It means that the item will be marked as removed and inserted in the differ changes\n\t * set, so it will be effectively re-converted when differ changes will be handled by a dispatcher.\n\t *\n\t * @param {module:engine/model/item~Item} item Item to refresh.\n\t */\n\trefreshItem( item ) {\n\t\tif ( this._isInInsertedElement( item.parent ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._markRemove( item.parent, item.startOffset, item.offsetSize );\n\t\tthis._markInsert( item.parent, item.startOffset, item.offsetSize );\n\n\t\tconst range = Range._createOn( item );\n\n\t\tfor ( const marker of this._markerCollection.getMarkersIntersectingRange( range ) ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tthis.bufferMarkerChange( marker.name, markerRange, markerRange, marker.affectsData );\n\t\t}\n\n\t\t// Clear cache after each buffered operation as it is no longer valid.\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Buffers the given operation. An operation has to be buffered before it is executed.\n\t *\n\t * Operation type is checked and it is checked which nodes it will affect. These nodes are then stored in `Differ`\n\t * in the state before the operation is executed.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation An operation to buffer.\n\t */\n\tbufferOperation( operation ) {\n\t\t// Below we take an operation, check its type, then use its parameters in marking (private) methods.\n\t\t// The general rule is to not mark elements inside inserted element. All inserted elements are re-rendered.\n\t\t// Marking changes in them would cause a \"double\" changing then.\n\t\t//\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert': {\n\t\t\t\tif ( this._isInInsertedElement( operation.position.parent ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis._markInsert( operation.position.parent, operation.position.offset, operation.nodes.maxOffset );\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'addAttribute':\n\t\t\tcase 'removeAttribute':\n\t\t\tcase 'changeAttribute': {\n\t\t\t\tfor ( const item of operation.range.getItems( { shallow: true } ) ) {\n\t\t\t\t\tif ( this._isInInsertedElement( item.parent ) ) {\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tthis._markAttribute( item );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'remove':\n\t\t\tcase 'move':\n\t\t\tcase 'reinsert': {\n\t\t\t\t// When range is moved to the same position then not mark it as a change.\n\t\t\t\t// See: https://github.com/ckeditor/ckeditor5-engine/issues/1664.\n\t\t\t\tif (\n\t\t\t\t\toperation.sourcePosition.isEqual( operation.targetPosition ) ||\n\t\t\t\t\toperation.sourcePosition.getShiftedBy( operation.howMany ).isEqual( operation.targetPosition )\n\t\t\t\t) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst sourceParentInserted = this._isInInsertedElement( operation.sourcePosition.parent );\n\t\t\t\tconst targetParentInserted = this._isInInsertedElement( operation.targetPosition.parent );\n\n\t\t\t\tif ( !sourceParentInserted ) {\n\t\t\t\t\tthis._markRemove( operation.sourcePosition.parent, operation.sourcePosition.offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\tif ( !targetParentInserted ) {\n\t\t\t\t\tthis._markInsert( operation.targetPosition.parent, operation.getMovedRangeStart().offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'rename': {\n\t\t\t\tif ( this._isInInsertedElement( operation.position.parent ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis._markRemove( operation.position.parent, operation.position.offset, 1 );\n\t\t\t\tthis._markInsert( operation.position.parent, operation.position.offset, 1 );\n\n\t\t\t\tconst range = Range._createFromPositionAndShift( operation.position, 1 );\n\n\t\t\t\tfor ( const marker of this._markerCollection.getMarkersIntersectingRange( range ) ) {\n\t\t\t\t\tconst markerRange = marker.getRange();\n\n\t\t\t\t\tthis.bufferMarkerChange( marker.name, markerRange, markerRange, marker.affectsData );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'split': {\n\t\t\t\tconst splitElement = operation.splitPosition.parent;\n\n\t\t\t\t// Mark that children of the split element were removed.\n\t\t\t\tif ( !this._isInInsertedElement( splitElement ) ) {\n\t\t\t\t\tthis._markRemove( splitElement, operation.splitPosition.offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\t// Mark that the new element (split copy) was inserted.\n\t\t\t\tif ( !this._isInInsertedElement( operation.insertionPosition.parent ) ) {\n\t\t\t\t\tthis._markInsert( operation.insertionPosition.parent, operation.insertionPosition.offset, 1 );\n\t\t\t\t}\n\n\t\t\t\t// If the split took the element from the graveyard, mark that the element from the graveyard was removed.\n\t\t\t\tif ( operation.graveyardPosition ) {\n\t\t\t\t\tthis._markRemove( operation.graveyardPosition.parent, operation.graveyardPosition.offset, 1 );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'merge': {\n\t\t\t\t// Mark that the merged element was removed.\n\t\t\t\tconst mergedElement = operation.sourcePosition.parent;\n\n\t\t\t\tif ( !this._isInInsertedElement( mergedElement.parent ) ) {\n\t\t\t\t\tthis._markRemove( mergedElement.parent, mergedElement.startOffset, 1 );\n\t\t\t\t}\n\n\t\t\t\t// Mark that the merged element was inserted into graveyard.\n\t\t\t\tconst graveyardParent = operation.graveyardPosition.parent;\n\n\t\t\t\tthis._markInsert( graveyardParent, operation.graveyardPosition.offset, 1 );\n\n\t\t\t\t// Mark that children of merged element were inserted at new parent.\n\t\t\t\tconst mergedIntoElement = operation.targetPosition.parent;\n\n\t\t\t\tif ( !this._isInInsertedElement( mergedIntoElement ) ) {\n\t\t\t\t\tthis._markInsert( mergedIntoElement, operation.targetPosition.offset, mergedElement.maxOffset );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\t// Clear cache after each buffered operation as it is no longer valid.\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Buffers a marker change.\n\t *\n\t * @param {String} markerName The name of the marker that changed.\n\t * @param {module:engine/model/range~Range|null} oldRange Marker range before the change or `null` if the marker has just\n\t * been created.\n\t * @param {module:engine/model/range~Range|null} newRange Marker range after the change or `null` if the marker was removed.\n\t * @param {Boolean} affectsData Flag indicating whether marker affects the editor data.\n\t */\n\tbufferMarkerChange( markerName, oldRange, newRange, affectsData ) {\n\t\tconst buffered = this._changedMarkers.get( markerName );\n\n\t\tif ( !buffered ) {\n\t\t\tthis._changedMarkers.set( markerName, {\n\t\t\t\toldRange,\n\t\t\t\tnewRange,\n\t\t\t\taffectsData\n\t\t\t} );\n\t\t} else {\n\t\t\tbuffered.newRange = newRange;\n\t\t\tbuffered.affectsData = affectsData;\n\n\t\t\tif ( buffered.oldRange == null && buffered.newRange == null ) {\n\t\t\t\t// The marker is going to be removed (`newRange == null`) but it did not exist before the first buffered change\n\t\t\t\t// (`buffered.oldRange == null`). In this case, do not keep the marker in buffer at all.\n\t\t\t\tthis._changedMarkers.delete( markerName );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns all markers that should be removed as a result of buffered changes.\n\t *\n\t * @returns {Array.<Object>} Markers to remove. Each array item is an object containing the `name` and `range` properties.\n\t */\n\tgetMarkersToRemove() {\n\t\tconst result = [];\n\n\t\tfor ( const [ name, change ] of this._changedMarkers ) {\n\t\t\tif ( change.oldRange != null ) {\n\t\t\t\tresult.push( { name, range: change.oldRange } );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns all markers which should be added as a result of buffered changes.\n\t *\n\t * @returns {Array.<Object>} Markers to add. Each array item is an object containing the `name` and `range` properties.\n\t */\n\tgetMarkersToAdd() {\n\t\tconst result = [];\n\n\t\tfor ( const [ name, change ] of this._changedMarkers ) {\n\t\t\tif ( change.newRange != null ) {\n\t\t\t\tresult.push( { name, range: change.newRange } );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns all markers which changed.\n\t *\n\t * @returns {Array.<Object>}\n\t */\n\tgetChangedMarkers() {\n\t\treturn Array.from( this._changedMarkers ).map( item => (\n\t\t\t{\n\t\t\t\tname: item[ 0 ],\n\t\t\t\tdata: {\n\t\t\t\t\toldRange: item[ 1 ].oldRange,\n\t\t\t\t\tnewRange: item[ 1 ].newRange\n\t\t\t\t}\n\t\t\t}\n\t\t) );\n\t}\n\n\t/**\n\t * Checks whether some of the buffered changes affect the editor data.\n\t *\n\t * Types of changes which affect the editor data:\n\t *\n\t * * model structure changes,\n\t * * attribute changes,\n\t * * changes of markers which were defined as `affectingData`.\n\t *\n\t * @returns {Boolean}\n\t */\n\thasDataChanges() {\n\t\tfor ( const [ , change ] of this._changedMarkers ) {\n\t\t\tif ( change.affectsData ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\t// If markers do not affect the data, check whether there are some changes in elements.\n\t\treturn this._changesInElement.size > 0;\n\t}\n\n\t/**\n\t * Calculates the diff between the old model tree state (the state before the first buffered operations since the last {@link #reset}\n\t * call) and the new model tree state (actual one). It should be called after all buffered operations are executed.\n\t *\n\t * The diff set is returned as an array of diff items, each describing a change done on the model. The items are sorted by\n\t * the position on which the change happened. If a position {@link module:engine/model/position~Position#isBefore is before}\n\t * another one, it will be on an earlier index in the diff set.\n\t *\n\t * Because calculating the diff is a costly operation, the result is cached. If no new operation was buffered since the\n\t * previous {@link #getChanges} call, the next call will return the cached value.\n\t *\n\t * @param {Object} options Additional options.\n\t * @param {Boolean} [options.includeChangesInGraveyard=false] If set to `true`, also changes that happened\n\t * in the graveyard root will be returned. By default, changes in the graveyard root are not returned.\n\t * @returns {Array.<Object>} Diff between the old and the new model tree state.\n\t */\n\tgetChanges( options = { includeChangesInGraveyard: false } ) {\n\t\t// If there are cached changes, just return them instead of calculating changes again.\n\t\tif ( this._cachedChanges ) {\n\t\t\tif ( options.includeChangesInGraveyard ) {\n\t\t\t\treturn this._cachedChangesWithGraveyard.slice();\n\t\t\t} else {\n\t\t\t\treturn this._cachedChanges.slice();\n\t\t\t}\n\t\t}\n\n\t\t// Will contain returned results.\n\t\tconst diffSet = [];\n\n\t\t// Check all changed elements.\n\t\tfor ( const element of this._changesInElement.keys() ) {\n\t\t\t// Get changes for this element and sort them.\n\t\t\tconst changes = this._changesInElement.get( element ).sort( ( a, b ) => {\n\t\t\t\tif ( a.offset === b.offset ) {\n\t\t\t\t\tif ( a.type != b.type ) {\n\t\t\t\t\t\t// If there are multiple changes at the same position, \"remove\" change should be first.\n\t\t\t\t\t\t// If the order is different, for example, we would first add some nodes and then removed them\n\t\t\t\t\t\t// (instead of the nodes that we should remove).\n\t\t\t\t\t\treturn a.type == 'remove' ? -1 : 1;\n\t\t\t\t\t}\n\n\t\t\t\t\treturn 0;\n\t\t\t\t}\n\n\t\t\t\treturn a.offset < b.offset ? -1 : 1;\n\t\t\t} );\n\n\t\t\t// Get children of this element before any change was applied on it.\n\t\t\tconst snapshotChildren = this._elementSnapshots.get( element );\n\t\t\t// Get snapshot of current element's children.\n\t\t\tconst elementChildren = _getChildrenSnapshot( element.getChildren() );\n\n\t\t\t// Generate actions basing on changes done on element.\n\t\t\tconst actions = _generateActionsFromChanges( snapshotChildren.length, changes );\n\n\t\t\tlet i = 0; // Iterator in `elementChildren` array -- iterates through current children of element.\n\t\t\tlet j = 0; // Iterator in `snapshotChildren` array -- iterates through old children of element.\n\n\t\t\t// Process every action.\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'i' ) {\n\t\t\t\t\t// Generate diff item for this element and insert it into the diff set.\n\t\t\t\t\tdiffSet.push( this._getInsertDiff( element, i, elementChildren[ i ].name ) );\n\n\t\t\t\t\ti++;\n\t\t\t\t} else if ( action === 'r' ) {\n\t\t\t\t\t// Generate diff item for this element and insert it into the diff set.\n\t\t\t\t\tdiffSet.push( this._getRemoveDiff( element, i, snapshotChildren[ j ].name ) );\n\n\t\t\t\t\tj++;\n\t\t\t\t} else if ( action === 'a' ) {\n\t\t\t\t\t// Take attributes from saved and current children.\n\t\t\t\t\tconst elementAttributes = elementChildren[ i ].attributes;\n\t\t\t\t\tconst snapshotAttributes = snapshotChildren[ j ].attributes;\n\t\t\t\t\tlet range;\n\n\t\t\t\t\tif ( elementChildren[ i ].name == '$text' ) {\n\t\t\t\t\t\trange = new Range( Position._createAt( element, i ), Position._createAt( element, i + 1 ) );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tconst index = element.offsetToIndex( i );\n\t\t\t\t\t\trange = new Range( Position._createAt( element, i ), Position._createAt( element.getChild( index ), 0 ) );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Generate diff items for this change (there might be multiple attributes changed and\n\t\t\t\t\t// there is a single diff for each of them) and insert them into the diff set.\n\t\t\t\t\tdiffSet.push( ...this._getAttributesDiff( range, snapshotAttributes, elementAttributes ) );\n\n\t\t\t\t\ti++;\n\t\t\t\t\tj++;\n\t\t\t\t} else {\n\t\t\t\t\t// `action` is 'equal'. Child not changed.\n\t\t\t\t\ti++;\n\t\t\t\t\tj++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Then, sort the changes by the position (change at position before other changes is first).\n\t\tdiffSet.sort( ( a, b ) => {\n\t\t\t// If the change is in different root, we don't care much, but we'd like to have all changes in given\n\t\t\t// root \"together\" in the array. So let's just sort them by the root name. It does not matter which root\n\t\t\t// will be processed first.\n\t\t\tif ( a.position.root != b.position.root ) {\n\t\t\t\treturn a.position.root.rootName < b.position.root.rootName ? -1 : 1;\n\t\t\t}\n\n\t\t\t// If change happens at the same position...\n\t\t\tif ( a.position.isEqual( b.position ) ) {\n\t\t\t\t// Keep chronological order of operations.\n\t\t\t\treturn a.changeCount - b.changeCount;\n\t\t\t}\n\n\t\t\t// If positions differ, position \"on the left\" should be earlier in the result.\n\t\t\treturn a.position.isBefore( b.position ) ? -1 : 1;\n\t\t} );\n\n\t\t// Glue together multiple changes (mostly on text nodes).\n\t\tfor ( let i = 1; i < diffSet.length; i++ ) {\n\t\t\tconst prevDiff = diffSet[ i - 1 ];\n\t\t\tconst thisDiff = diffSet[ i ];\n\n\t\t\t// Glue remove changes if they happen on text on same position.\n\t\t\tconst isConsecutiveTextRemove =\n\t\t\t\tprevDiff.type == 'remove' && thisDiff.type == 'remove' &&\n\t\t\t\tprevDiff.name == '$text' && thisDiff.name == '$text' &&\n\t\t\t\tprevDiff.position.isEqual( thisDiff.position );\n\n\t\t\t// Glue insert changes if they happen on text on consecutive fragments.\n\t\t\tconst isConsecutiveTextAdd =\n\t\t\t\tprevDiff.type == 'insert' && thisDiff.type == 'insert' &&\n\t\t\t\tprevDiff.name == '$text' && thisDiff.name == '$text' &&\n\t\t\t\tprevDiff.position.parent == thisDiff.position.parent &&\n\t\t\t\tprevDiff.position.offset + prevDiff.length == thisDiff.position.offset;\n\n\t\t\t// Glue attribute changes if they happen on consecutive fragments and have same key, old value and new value.\n\t\t\tconst isConsecutiveAttributeChange =\n\t\t\t\tprevDiff.type == 'attribute' && thisDiff.type == 'attribute' &&\n\t\t\t\tprevDiff.position.parent == thisDiff.position.parent &&\n\t\t\t\tprevDiff.range.isFlat && thisDiff.range.isFlat &&\n\t\t\t\tprevDiff.position.offset + prevDiff.length == thisDiff.position.offset &&\n\t\t\t\tprevDiff.attributeKey == thisDiff.attributeKey &&\n\t\t\t\tprevDiff.attributeOldValue == thisDiff.attributeOldValue &&\n\t\t\t\tprevDiff.attributeNewValue == thisDiff.attributeNewValue;\n\n\t\t\tif ( isConsecutiveTextRemove || isConsecutiveTextAdd || isConsecutiveAttributeChange ) {\n\t\t\t\tdiffSet[ i - 1 ].length++;\n\n\t\t\t\tif ( isConsecutiveAttributeChange ) {\n\t\t\t\t\tdiffSet[ i - 1 ].range.end = diffSet[ i - 1 ].range.end.getShiftedBy( 1 );\n\t\t\t\t}\n\n\t\t\t\tdiffSet.splice( i, 1 );\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\n\t\t// Remove `changeCount` property from diff items. It is used only for sorting and is internal thing.\n\t\tfor ( const item of diffSet ) {\n\t\t\tdelete item.changeCount;\n\n\t\t\tif ( item.type == 'attribute' ) {\n\t\t\t\tdelete item.position;\n\t\t\t\tdelete item.length;\n\t\t\t}\n\t\t}\n\n\t\tthis._changeCount = 0;\n\n\t\t// Cache changes.\n\t\tthis._cachedChangesWithGraveyard = diffSet.slice();\n\t\tthis._cachedChanges = diffSet.slice().filter( _changesInGraveyardFilter );\n\n\t\tif ( options.includeChangesInGraveyard ) {\n\t\t\treturn this._cachedChangesWithGraveyard;\n\t\t} else {\n\t\t\treturn this._cachedChanges;\n\t\t}\n\t}\n\n\t/**\n\t * Resets `Differ`. Removes all buffered changes.\n\t */\n\treset() {\n\t\tthis._changesInElement.clear();\n\t\tthis._elementSnapshots.clear();\n\t\tthis._changedMarkers.clear();\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Saves and handles an insert change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_markInsert( parent, offset, howMany ) {\n\t\tconst changeItem = { type: 'insert', offset, howMany, count: this._changeCount++ };\n\n\t\tthis._markChange( parent, changeItem );\n\t}\n\n\t/**\n\t * Saves and handles a remove change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_markRemove( parent, offset, howMany ) {\n\t\tconst changeItem = { type: 'remove', offset, howMany, count: this._changeCount++ };\n\n\t\tthis._markChange( parent, changeItem );\n\n\t\tthis._removeAllNestedChanges( parent, offset, howMany );\n\t}\n\n\t/**\n\t * Saves and handles an attribute change.\n\t *\n\t * @private\n\t * @param {module:engine/model/item~Item} item\n\t */\n\t_markAttribute( item ) {\n\t\tconst changeItem = { type: 'attribute', offset: item.startOffset, howMany: item.offsetSize, count: this._changeCount++ };\n\n\t\tthis._markChange( item.parent, changeItem );\n\t}\n\n\t/**\n\t * Saves and handles a model change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Object} changeItem\n\t */\n\t_markChange( parent, changeItem ) {\n\t\t// First, make a snapshot of this parent's children (it will be made only if it was not made before).\n\t\tthis._makeSnapshot( parent );\n\n\t\t// Then, get all changes that already were done on the element (empty array if this is the first change).\n\t\tconst changes = this._getChangesForElement( parent );\n\n\t\t// Then, look through all the changes, and transform them or the new change.\n\t\tthis._handleChange( changeItem, changes );\n\n\t\t// Add the new change.\n\t\tchanges.push( changeItem );\n\n\t\t// Remove incorrect changes. During transformation some change might be, for example, included in another.\n\t\t// In that case, the change will have `howMany` property set to `0` or less. We need to remove those changes.\n\t\tfor ( let i = 0; i < changes.length; i++ ) {\n\t\t\tif ( changes[ i ].howMany < 1 ) {\n\t\t\t\tchanges.splice( i, 1 );\n\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Gets an array of changes that have already been saved for a given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {Array.<Object>}\n\t */\n\t_getChangesForElement( element ) {\n\t\tlet changes;\n\n\t\tif ( this._changesInElement.has( element ) ) {\n\t\t\tchanges = this._changesInElement.get( element );\n\t\t} else {\n\t\t\tchanges = [];\n\n\t\t\tthis._changesInElement.set( element, changes );\n\t\t}\n\n\t\treturn changes;\n\t}\n\n\t/**\n\t * Saves a children snapshot for a given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t */\n\t_makeSnapshot( element ) {\n\t\tif ( !this._elementSnapshots.has( element ) ) {\n\t\t\tthis._elementSnapshots.set( element, _getChildrenSnapshot( element.getChildren() ) );\n\t\t}\n\t}\n\n\t/**\n\t * For a given newly saved change, compares it with a change already done on the element and modifies the incoming\n\t * change and/or the old change.\n\t *\n\t * @private\n\t * @param {Object} inc Incoming (new) change.\n\t * @param {Array.<Object>} changes An array containing all the changes done on that element.\n\t */\n\t_handleChange( inc, changes ) {\n\t\t// We need a helper variable that will store how many nodes are to be still handled for this change item.\n\t\t// `nodesToHandle` (how many nodes still need to be handled) and `howMany` (how many nodes were affected)\n\t\t// needs to be differentiated.\n\t\t//\n\t\t// This comes up when there are multiple changes that are affected by `inc` change item.\n\t\t//\n\t\t// For example: assume two insert changes: `{ offset: 2, howMany: 1 }` and `{ offset: 5, howMany: 1 }`.\n\t\t// Assume that `inc` change is remove `{ offset: 2, howMany: 2, nodesToHandle: 2 }`.\n\t\t//\n\t\t// Then, we:\n\t\t// - \"forget\" about first insert change (it is \"eaten\" by remove),\n\t\t// - because of that, at the end we will want to remove only one node (`nodesToHandle = 1`),\n\t\t// - but still we have to change offset of the second insert change from `5` to `3`!\n\t\t//\n\t\t// So, `howMany` does not change throughout items transformation and keeps information about how many nodes were affected,\n\t\t// while `nodesToHandle` means how many nodes need to be handled after the change item is transformed by other changes.\n\t\tinc.nodesToHandle = inc.howMany;\n\n\t\tfor ( const old of changes ) {\n\t\t\tconst incEnd = inc.offset + inc.howMany;\n\t\t\tconst oldEnd = old.offset + old.howMany;\n\n\t\t\tif ( inc.type == 'insert' ) {\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\told.howMany += inc.nodesToHandle;\n\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\tif ( inc.offset < old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\t// This case is more complicated, because attribute change has to be split into two.\n\t\t\t\t\t\t// Example (assume that uppercase and lowercase letters mean different attributes):\n\t\t\t\t\t\t//\n\t\t\t\t\t\t// initial state:\t\tabcxyz\n\t\t\t\t\t\t// attribute change:\taBCXYz\n\t\t\t\t\t\t// incoming insert:\t\taBCfooXYz\n\t\t\t\t\t\t//\n\t\t\t\t\t\t// Change ranges cannot intersect because each item has to be described exactly (it was either\n\t\t\t\t\t\t// not changed, inserted, removed, or its attribute was changed). That's why old attribute\n\t\t\t\t\t\t// change has to be split and both parts has to be handled separately from now on.\n\t\t\t\t\t\tconst howMany = old.howMany;\n\n\t\t\t\t\t\told.howMany = inc.offset - old.offset;\n\n\t\t\t\t\t\t// Add the second part of attribute change to the beginning of processed array so it won't\n\t\t\t\t\t\t// be processed again in this loop.\n\t\t\t\t\t\tchanges.unshift( {\n\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\toffset: incEnd,\n\t\t\t\t\t\t\thowMany: howMany - old.howMany,\n\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t} );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( inc.type == 'remove' ) {\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( incEnd <= oldEnd ) {\n\t\t\t\t\t\tif ( inc.offset < old.offset ) {\n\t\t\t\t\t\t\tconst intersectionLength = incEnd - old.offset;\n\n\t\t\t\t\t\t\told.offset = inc.offset;\n\n\t\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t\t\tinc.nodesToHandle -= intersectionLength;\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\told.howMany -= inc.nodesToHandle;\n\t\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t} else {\n\t\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\t\tinc.nodesToHandle -= old.howMany;\n\t\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\t\tconst intersectionLength = oldEnd - inc.offset;\n\n\t\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t\t\tinc.nodesToHandle -= intersectionLength;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < old.offset ) {\n\t\t\t\t\t\tinc.nodesToHandle += old.howMany;\n\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < old.offset ) {\n\t\t\t\t\t\tconst intersectionLength = incEnd - old.offset;\n\n\t\t\t\t\t\told.offset = inc.offset;\n\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\tif ( incEnd <= oldEnd ) {\n\t\t\t\t\t\t\t// On first sight in this case we don't need to split attribute operation into two.\n\t\t\t\t\t\t\t// However the changes set is later converted to actions (see `_generateActionsFromChanges`).\n\t\t\t\t\t\t\t// For that reason, no two changes may intersect.\n\t\t\t\t\t\t\t// So we cannot have an attribute change that \"contains\" remove change.\n\t\t\t\t\t\t\t// Attribute change needs to be split.\n\t\t\t\t\t\t\tconst howMany = old.howMany;\n\n\t\t\t\t\t\t\told.howMany = inc.offset - old.offset;\n\n\t\t\t\t\t\t\tconst howManyAfter = howMany - old.howMany - inc.nodesToHandle;\n\n\t\t\t\t\t\t\t// Add the second part of attribute change to the beginning of processed array so it won't\n\t\t\t\t\t\t\t// be processed again in this loop.\n\t\t\t\t\t\t\tchanges.unshift( {\n\t\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\t\toffset: inc.offset,\n\t\t\t\t\t\t\t\thowMany: howManyAfter,\n\t\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\told.howMany -= oldEnd - inc.offset;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( inc.type == 'attribute' ) {\n\t\t\t\t// In case of attribute change, `howMany` should be kept same as `nodesToHandle`. It's not an error.\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( inc.offset < old.offset && incEnd > old.offset ) {\n\t\t\t\t\t\tif ( incEnd > oldEnd ) {\n\t\t\t\t\t\t\t// This case is similar to a case described when incoming change was insert and old change was attribute.\n\t\t\t\t\t\t\t// See comment above.\n\t\t\t\t\t\t\t//\n\t\t\t\t\t\t\t// This time incoming change is attribute. We need to split incoming change in this case too.\n\t\t\t\t\t\t\t// However this time, the second part of the attribute change needs to be processed further\n\t\t\t\t\t\t\t// because there might be other changes that it collides with.\n\t\t\t\t\t\t\tconst attributePart = {\n\t\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\t\toffset: oldEnd,\n\t\t\t\t\t\t\t\thowMany: incEnd - oldEnd,\n\t\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t\t};\n\n\t\t\t\t\t\t\tthis._handleChange( attributePart, changes );\n\n\t\t\t\t\t\t\tchanges.push( attributePart );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tinc.nodesToHandle = old.offset - inc.offset;\n\t\t\t\t\t\tinc.howMany = inc.nodesToHandle;\n\t\t\t\t\t} else if ( inc.offset >= old.offset && inc.offset < oldEnd ) {\n\t\t\t\t\t\tif ( incEnd > oldEnd ) {\n\t\t\t\t\t\t\tinc.nodesToHandle = incEnd - oldEnd;\n\t\t\t\t\t\t\tinc.offset = oldEnd;\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\t// This is a case when attribute change \"contains\" remove change.\n\t\t\t\t\t// The attribute change needs to be split into two because changes cannot intersect.\n\t\t\t\t\tif ( inc.offset < old.offset && incEnd > old.offset ) {\n\t\t\t\t\t\tconst attributePart = {\n\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\toffset: old.offset,\n\t\t\t\t\t\t\thowMany: incEnd - old.offset,\n\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t};\n\n\t\t\t\t\t\tthis._handleChange( attributePart, changes );\n\n\t\t\t\t\t\tchanges.push( attributePart );\n\n\t\t\t\t\t\tinc.nodesToHandle = old.offset - inc.offset;\n\t\t\t\t\t\tinc.howMany = inc.nodesToHandle;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\t// There are only two conflicting scenarios possible here:\n\t\t\t\t\tif ( inc.offset >= old.offset && incEnd <= oldEnd ) {\n\t\t\t\t\t\t// `old` change includes `inc` change, or they are the same.\n\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\tinc.howMany = 0;\n\t\t\t\t\t\tinc.offset = 0;\n\t\t\t\t\t} else if ( inc.offset <= old.offset && incEnd >= oldEnd ) {\n\t\t\t\t\t\t// `inc` change includes `old` change.\n\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tinc.howMany = inc.nodesToHandle;\n\t\tdelete inc.nodesToHandle;\n\t}\n\n\t/**\n\t * Returns an object with a single insert change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent The element in which the change happened.\n\t * @param {Number} offset The offset at which change happened.\n\t * @param {String} name The name of the removed element or `'$text'` for a character.\n\t * @returns {Object} The diff item.\n\t */\n\t_getInsertDiff( parent, offset, name ) {\n\t\treturn {\n\t\t\ttype: 'insert',\n\t\t\tposition: Position._createAt( parent, offset ),\n\t\t\tname,\n\t\t\tlength: 1,\n\t\t\tchangeCount: this._changeCount++\n\t\t};\n\t}\n\n\t/**\n\t * Returns an object with a single remove change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent The element in which change happened.\n\t * @param {Number} offset The offset at which change happened.\n\t * @param {String} name The name of the removed element or `'$text'` for a character.\n\t * @returns {Object} The diff item.\n\t */\n\t_getRemoveDiff( parent, offset, name ) {\n\t\treturn {\n\t\t\ttype: 'remove',\n\t\t\tposition: Position._createAt( parent, offset ),\n\t\t\tname,\n\t\t\tlength: 1,\n\t\t\tchangeCount: this._changeCount++\n\t\t};\n\t}\n\n\t/**\n\t * Returns an array of objects where each one is a single attribute change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range The range where the change happened.\n\t * @param {Map} oldAttributes A map, map iterator or compatible object that contains attributes before the change.\n\t * @param {Map} newAttributes A map, map iterator or compatible object that contains attributes after the change.\n\t * @returns {Array.<Object>} An array containing one or more diff items.\n\t */\n\t_getAttributesDiff( range, oldAttributes, newAttributes ) {\n\t\t// Results holder.\n\t\tconst diffs = [];\n\n\t\t// Clone new attributes as we will be performing changes on this object.\n\t\tnewAttributes = new Map( newAttributes );\n\n\t\t// Look through old attributes.\n\t\tfor ( const [ key, oldValue ] of oldAttributes ) {\n\t\t\t// Check what is the new value of the attribute (or if it was removed).\n\t\t\tconst newValue = newAttributes.has( key ) ? newAttributes.get( key ) : null;\n\n\t\t\t// If values are different (or attribute was removed)...\n\t\t\tif ( newValue !== oldValue ) {\n\t\t\t\t// Add diff item.\n\t\t\t\tdiffs.push( {\n\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\tposition: range.start,\n\t\t\t\t\trange: range.clone(),\n\t\t\t\t\tlength: 1,\n\t\t\t\t\tattributeKey: key,\n\t\t\t\t\tattributeOldValue: oldValue,\n\t\t\t\t\tattributeNewValue: newValue,\n\t\t\t\t\tchangeCount: this._changeCount++\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Prevent returning two diff items for the same change.\n\t\t\tnewAttributes.delete( key );\n\t\t}\n\n\t\t// Look through new attributes that weren't handled above.\n\t\tfor ( const [ key, newValue ] of newAttributes ) {\n\t\t\t// Each of them is a new attribute. Add diff item.\n\t\t\tdiffs.push( {\n\t\t\t\ttype: 'attribute',\n\t\t\t\tposition: range.start,\n\t\t\t\trange: range.clone(),\n\t\t\t\tlength: 1,\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: null,\n\t\t\t\tattributeNewValue: newValue,\n\t\t\t\tchangeCount: this._changeCount++\n\t\t\t} );\n\t\t}\n\n\t\treturn diffs;\n\t}\n\n\t/**\n\t * Checks whether given element or any of its parents is an element that is buffered as an inserted element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element Element to check.\n\t * @returns {Boolean}\n\t */\n\t_isInInsertedElement( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( !parent ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst changes = this._changesInElement.get( parent );\n\t\tconst offset = element.startOffset;\n\n\t\tif ( changes ) {\n\t\t\tfor ( const change of changes ) {\n\t\t\t\tif ( change.type == 'insert' && offset >= change.offset && offset < change.offset + change.howMany ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this._isInInsertedElement( parent );\n\t}\n\n\t/**\n\t * Removes deeply all buffered changes that are registered in elements from range specified by `parent`, `offset`\n\t * and `howMany`.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_removeAllNestedChanges( parent, offset, howMany ) {\n\t\tconst range = new Range( Position._createAt( parent, offset ), Position._createAt( parent, offset + howMany ) );\n\n\t\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'element' ) ) {\n\t\t\t\tthis._elementSnapshots.delete( item );\n\t\t\t\tthis._changesInElement.delete( item );\n\n\t\t\t\tthis._removeAllNestedChanges( item, 0, item.maxOffset );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Returns an array that is a copy of passed child list with the exception that text nodes are split to one or more\n// objects, each representing one character and attributes set on that character.\nfunction _getChildrenSnapshot( children ) {\n\tconst snapshot = [];\n\n\tfor ( const child of children ) {\n\t\tif ( child.is( 'text' ) ) {\n\t\t\tfor ( let i = 0; i < child.data.length; i++ ) {\n\t\t\t\tsnapshot.push( {\n\t\t\t\t\tname: '$text',\n\t\t\t\t\tattributes: new Map( child.getAttributes() )\n\t\t\t\t} );\n\t\t\t}\n\t\t} else {\n\t\t\tsnapshot.push( {\n\t\t\t\tname: child.name,\n\t\t\t\tattributes: new Map( child.getAttributes() )\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn snapshot;\n}\n\n// Generates array of actions for given changes set.\n// It simulates what `diff` function does.\n// Generated actions are:\n// - 'e' for 'equal' - when item at that position did not change,\n// - 'i' for 'insert' - when item at that position was inserted,\n// - 'r' for 'remove' - when item at that position was removed,\n// - 'a' for 'attribute' - when item at that position has it attributes changed.\n//\n// Example (assume that uppercase letters have bold attribute, compare with function code):\n//\n// children before:\tfooBAR\n// children after:\tfoxybAR\n//\n// changes: type: remove, offset: 1, howMany: 1\n//\t\t\ttype: insert, offset: 2, howMany: 2\n//\t\t\ttype: attribute, offset: 4, howMany: 1\n//\n// expected actions: equal (f), remove (o), equal (o), insert (x), insert (y), attribute (b), equal (A), equal (R)\n//\n// steps taken by th script:\n//\n// 1. change = \"type: remove, offset: 1, howMany: 1\"; offset = 0; oldChildrenHandled = 0\n// 1.1 between this change and the beginning is one not-changed node, fill with one equal action, one old child has been handled\n// 1.2 this change removes one node, add one remove action\n// 1.3 change last visited `offset` to 1\n// 1.4 since an old child has been removed, one more old child has been handled\n// 1.5 actions at this point are: equal, remove\n//\n// 2. change = \"type: insert, offset: 2, howMany: 2\"; offset = 1; oldChildrenHandled = 2\n// 2.1 between this change and previous change is one not-changed node, add equal action, another one old children has been handled\n// 2.2 this change inserts two nodes, add two insert actions\n// 2.3 change last visited offset to the end of the inserted range, that is 4\n// 2.4 actions at this point are: equal, remove, equal, insert, insert\n//\n// 3. change = \"type: attribute, offset: 4, howMany: 1\"; offset = 4, oldChildrenHandled = 3\n// 3.1 between this change and previous change are no not-changed nodes\n// 3.2 this change changes one node, add one attribute action\n// 3.3 change last visited `offset` to the end of change range, that is 5\n// 3.4 since an old child has been changed, one more old child has been handled\n// 3.5 actions at this point are: equal, remove, equal, insert, insert, attribute\n//\n// 4. after loop oldChildrenHandled = 4, oldChildrenLength = 6 (fooBAR is 6 characters)\n// 4.1 fill up with two equal actions\n//\n// The result actions are: equal, remove, equal, insert, insert, attribute, equal, equal.\nfunction _generateActionsFromChanges( oldChildrenLength, changes ) {\n\tconst actions = [];\n\n\tlet offset = 0;\n\tlet oldChildrenHandled = 0;\n\n\t// Go through all buffered changes.\n\tfor ( const change of changes ) {\n\t\t// First, fill \"holes\" between changes with \"equal\" actions.\n\t\tif ( change.offset > offset ) {\n\t\t\tfor ( let i = 0; i < change.offset - offset; i++ ) {\n\t\t\t\tactions.push( 'e' );\n\t\t\t}\n\n\t\t\toldChildrenHandled += change.offset - offset;\n\t\t}\n\n\t\t// Then, fill up actions accordingly to change type.\n\t\tif ( change.type == 'insert' ) {\n\t\t\tfor ( let i = 0; i < change.howMany; i++ ) {\n\t\t\t\tactions.push( 'i' );\n\t\t\t}\n\n\t\t\t// The last handled offset is after inserted range.\n\t\t\toffset = change.offset + change.howMany;\n\t\t} else if ( change.type == 'remove' ) {\n\t\t\tfor ( let i = 0; i < change.howMany; i++ ) {\n\t\t\t\tactions.push( 'r' );\n\t\t\t}\n\n\t\t\t// The last handled offset is at the position where the nodes were removed.\n\t\t\toffset = change.offset;\n\t\t\t// We removed `howMany` old nodes, update `oldChildrenHandled`.\n\t\t\toldChildrenHandled += change.howMany;\n\t\t} else {\n\t\t\tactions.push( ...'a'.repeat( change.howMany ).split( '' ) );\n\n\t\t\t// The last handled offset is at the position after the changed range.\n\t\t\toffset = change.offset + change.howMany;\n\t\t\t// We changed `howMany` old nodes, update `oldChildrenHandled`.\n\t\t\toldChildrenHandled += change.howMany;\n\t\t}\n\t}\n\n\t// Fill \"equal\" actions at the end of actions set. Use `oldChildrenHandled` to see how many children\n\t// has not been changed / removed at the end of their parent.\n\tif ( oldChildrenHandled < oldChildrenLength ) {\n\t\tfor ( let i = 0; i < oldChildrenLength - oldChildrenHandled - offset; i++ ) {\n\t\t\tactions.push( 'e' );\n\t\t}\n\t}\n\n\treturn actions;\n}\n\n// Filter callback for Array.filter that filters out change entries that are in graveyard.\nfunction _changesInGraveyardFilter( entry ) {\n\tconst posInGy = entry.position && entry.position.root.rootName == '$graveyard';\n\tconst rangeInGy = entry.range && entry.range.root.rootName == '$graveyard';\n\n\treturn !posInGy && !rangeInGy;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/history\n */\n\n/**\n * `History` keeps the track of all the operations applied to the {@link module:engine/model/document~Document document}.\n */\nexport default class History {\n\t/**\n\t * Creates an empty History instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Operations added to the history.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/model/operation/operation~Operation>} module:engine/model/history~History#_operations\n\t\t */\n\t\tthis._operations = [];\n\n\t\t/**\n\t\t * Holds an information which {@link module:engine/model/operation/operation~Operation operation} undoes which\n\t\t * {@link module:engine/model/operation/operation~Operation operation}.\n\t\t *\n\t\t * Keys of the map are \"undoing operations\", that is operations that undone some other operations. For each key, the\n\t\t * value is an operation that has been undone by the \"undoing operation\".\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/model/history~History#_undoPairs\n\t\t */\n\t\tthis._undoPairs = new Map();\n\n\t\t/**\n\t\t * Holds all undone operations.\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<module:engine/model/operation/operation~Operation>} module:engine/model/history~History#_undoneOperations\n\t\t */\n\t\tthis._undoneOperations = new Set();\n\t}\n\n\t/**\n\t * Adds an operation to the history.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to add.\n\t */\n\taddOperation( operation ) {\n\t\tif ( this._operations.includes( operation ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._operations.push( operation );\n\t}\n\n\t/**\n\t * Returns operations added to the history.\n\t *\n\t * @param {Number} [from=0] Base version from which operations should be returned (inclusive). Defaults to `0`, which means\n\t * that operations from the first one will be returned.\n\t * @param {Number} [to=Number.POSITIVE_INFINITY] Base version up to which operations should be returned (exclusive).\n\t * Defaults to `Number.POSITIVE_INFINITY` which means that operations up to the last one will be returned.\n\t * @returns {Iterable.<module:engine/model/operation/operation~Operation>} Operations added to the history.\n\t */\n\tgetOperations( from = 0, to = Number.POSITIVE_INFINITY ) {\n\t\tif ( from < 0 ) {\n\t\t\treturn [];\n\t\t}\n\n\t\treturn this._operations.slice( from, to );\n\t}\n\n\t/**\n\t * Returns operation from the history that bases on given `baseVersion`.\n\t *\n\t * @param {Number} baseVersion Base version of the operation to get.\n\t * @returns {module:engine/model/operation/operation~Operation|null} Operation with given base version or `null` if\n\t * there is no such operation in history.\n\t */\n\tgetOperation( baseVersion ) {\n\t\treturn this._operations[ baseVersion ];\n\t}\n\n\t/**\n\t * Marks in history that one operation is an operation that is undoing the other operation. By marking operation this way,\n\t * history is keeping more context information about operations, which helps in operational transformation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} undoneOperation Operation which is undone by `undoingOperation`.\n\t * @param {module:engine/model/operation/operation~Operation} undoingOperation Operation which undoes `undoneOperation`.\n\t */\n\tsetOperationAsUndone( undoneOperation, undoingOperation ) {\n\t\tthis._undoPairs.set( undoingOperation, undoneOperation );\n\t\tthis._undoneOperations.add( undoneOperation );\n\t}\n\n\t/**\n\t * Checks whether given `operation` is undoing any other operation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to check.\n\t * @returns {Boolean} `true` if given `operation` is undoing any other operation, `false` otherwise.\n\t */\n\tisUndoingOperation( operation ) {\n\t\treturn this._undoPairs.has( operation );\n\t}\n\n\t/**\n\t * Checks whether given `operation` has been undone by any other operation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to check.\n\t * @returns {Boolean} `true` if given `operation` has been undone any other operation, `false` otherwise.\n\t */\n\tisUndoneOperation( operation ) {\n\t\treturn this._undoneOperations.has( operation );\n\t}\n\n\t/**\n\t * For given `undoingOperation`, returns the operation which has been undone by it.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} undoingOperation\n\t * @returns {module:engine/model/operation/operation~Operation|undefined} Operation that has been undone by given\n\t * `undoingOperation` or `undefined` if given `undoingOperation` is not undoing any other operation.\n\t */\n\tgetUndoneOperation( undoingOperation ) {\n\t\treturn this._undoPairs.get( undoingOperation );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Set of utils to handle unicode characters.\n *\n * @module utils/unicode\n */\n\n/**\n * Checks whether given `character` is a combining mark.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isCombiningMark( character ) {\n\treturn !!character && character.length == 1 && /[\\u0300-\\u036f\\u1ab0-\\u1aff\\u1dc0-\\u1dff\\u20d0-\\u20ff\\ufe20-\\ufe2f]/.test( character );\n}\n\n/**\n * Checks whether given `character` is a high half of surrogate pair.\n *\n * Using UTF-16 terminology, a surrogate pair denotes UTF-16 character using two UTF-8 characters. The surrogate pair\n * consist of high surrogate pair character followed by low surrogate pair character.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isHighSurrogateHalf( character ) {\n\treturn !!character && character.length == 1 && /[\\ud800-\\udbff]/.test( character );\n}\n\n/**\n * Checks whether given `character` is a low half of surrogate pair.\n *\n * Using UTF-16 terminology, a surrogate pair denotes UTF-16 character using two UTF-8 characters. The surrogate pair\n * consist of high surrogate pair character followed by low surrogate pair character.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isLowSurrogateHalf( character ) {\n\treturn !!character && character.length == 1 && /[\\udc00-\\udfff]/.test( character );\n}\n\n/**\n * Checks whether given offset in a string is inside a surrogate pair (between two surrogate halves).\n *\n * @param {String} string String to check.\n * @param {Number} offset Offset to check.\n * @returns {Boolean}\n */\nexport function isInsideSurrogatePair( string, offset ) {\n\treturn isHighSurrogateHalf( string.charAt( offset - 1 ) ) && isLowSurrogateHalf( string.charAt( offset ) );\n}\n\n/**\n * Checks whether given offset in a string is between base character and combining mark or between two combining marks.\n *\n * @param {String} string String to check.\n * @param {Number} offset Offset to check.\n * @returns {Boolean}\n */\nexport function isInsideCombinedSymbol( string, offset ) {\n\treturn isCombiningMark( string.charAt( offset ) );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/document\n */\n\nimport Differ from './differ';\nimport RootElement from './rootelement';\nimport History from './history';\nimport DocumentSelection from './documentselection';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { isInsideSurrogatePair, isInsideCombinedSymbol } from '@ckeditor/ckeditor5-utils/src/unicode';\nimport { clone } from 'lodash-es';\n\n// @if CK_DEBUG_ENGINE // const { logDocument } = require( '../dev-utils/utils' );\n\nconst graveyardName = '$graveyard';\n\n/**\n * Data model's document. It contains the model's structure, its selection and the history of changes.\n *\n * Read more about working with the model in\n * {@glink framework/guides/architecture/editing-engine#model introduction to the the editing engine's architecture}.\n *\n * Usually, the document contains just one {@link module:engine/model/document~Document#roots root element}, so\n * you can retrieve it by just calling {@link module:engine/model/document~Document#getRoot} without specifying its name:\n *\n *\t\tmodel.document.getRoot(); // -> returns the main root\n *\n * However, the document may contain multiple roots – e.g. when the editor has multiple editable areas\n * (e.g. a title and a body of a message).\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Document {\n\t/**\n\t * Creates an empty document instance with no {@link #roots} (other than\n\t * the {@link #graveyard graveyard root}).\n\t */\n\tconstructor( model ) {\n\t\t/**\n\t\t * The {@link module:engine/model/model~Model model} that the document is a part of.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The document version. It starts from `0` and every operation increases the version number. It is used to ensure that\n\t\t * operations are applied on a proper document version.\n\t\t *\n\t\t * If the {@link module:engine/model/operation/operation~Operation#baseVersion base version} does not match the document version,\n\t\t * a {@link module:utils/ckeditorerror~CKEditorError model-document-applyOperation-wrong-version} error is thrown.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Number}\n\t\t */\n\t\tthis.version = 0;\n\n\t\t/**\n\t\t * The document's history.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/history~History}\n\t\t */\n\t\tthis.history = new History( this );\n\n\t\t/**\n\t\t * The selection in this document.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = new DocumentSelection( this );\n\n\t\t/**\n\t\t * A list of roots that are owned and managed by this document. Use {@link #createRoot} and\n\t\t * {@link #getRoot} to manipulate it.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis.roots = new Collection( { idProperty: 'rootName' } );\n\n\t\t/**\n\t\t * The model differ object. Its role is to buffer changes done on the model document and then calculate a diff of those changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/differ~Differ}\n\t\t */\n\t\tthis.differ = new Differ( model.markers );\n\n\t\t/**\n\t\t * Post-fixer callbacks registered to the model document.\n\t\t *\n\t\t * @private\n\t\t * @type {Set.<Function>}\n\t\t */\n\t\tthis._postFixers = new Set();\n\n\t\t/**\n\t\t * A boolean indicates whether the selection has changed until\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._hasSelectionChangedFromTheLastChangeBlock = false;\n\n\t\t// Graveyard tree root. Document always have a graveyard root, which stores removed nodes.\n\t\tthis.createRoot( '$root', graveyardName );\n\n\t\t// First, if the operation is a document operation check if it's base version is correct.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation && operation.baseVersion !== this.version ) {\n\t\t\t\t/**\n\t\t\t\t * Only operations with matching versions can be applied.\n\t\t\t\t *\n\t\t\t\t * @error document-applyOperation-wrong-version\n\t\t\t\t * @param {module:engine/model/operation/operation~Operation} operation\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-document-applyOperation-wrong-version: Only operations with matching versions can be applied.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ operation }\n\t\t\t\t);\n\t\t\t}\n\t\t}, { priority: 'highest' } );\n\n\t\t// Then, still before an operation is applied on model, buffer the change in differ.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation ) {\n\t\t\t\tthis.differ.bufferOperation( operation );\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\n\t\t// After the operation is applied, bump document's version and add the operation to the history.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation ) {\n\t\t\t\tthis.version++;\n\t\t\t\tthis.history.addOperation( operation );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// Listen to selection changes. If selection changed, mark it.\n\t\tthis.listenTo( this.selection, 'change', () => {\n\t\t\tthis._hasSelectionChangedFromTheLastChangeBlock = true;\n\t\t} );\n\n\t\t// Buffer marker changes.\n\t\t// This is not covered in buffering operations because markers may change outside of them (when they\n\t\t// are modified using `model.markers` collection, not through `MarkerOperation`).\n\t\tthis.listenTo( model.markers, 'update', ( evt, marker, oldRange, newRange ) => {\n\t\t\t// Whenever marker is updated, buffer that change.\n\t\t\tthis.differ.bufferMarkerChange( marker.name, oldRange, newRange, marker.affectsData );\n\n\t\t\tif ( oldRange === null ) {\n\t\t\t\t// If this is a new marker, add a listener that will buffer change whenever marker changes.\n\t\t\t\tmarker.on( 'change', ( evt, oldRange ) => {\n\t\t\t\t\tthis.differ.bufferMarkerChange( marker.name, oldRange, marker.getRange(), marker.affectsData );\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * The graveyard tree root. A document always has a graveyard root that stores removed nodes.\n\t *\n\t * @readonly\n\t * @member {module:engine/model/rootelement~RootElement}\n\t */\n\tget graveyard() {\n\t\treturn this.getRoot( graveyardName );\n\t}\n\n\t/**\n\t * Creates a new root.\n\t *\n\t * @param {String} [elementName='$root'] The element name. Defaults to `'$root'` which also has some basic schema defined\n\t * (`$block`s are allowed inside the `$root`). Make sure to define a proper schema if you use a different name.\n\t * @param {String} [rootName='main'] A unique root name.\n\t * @returns {module:engine/model/rootelement~RootElement} The created root.\n\t */\n\tcreateRoot( elementName = '$root', rootName = 'main' ) {\n\t\tif ( this.roots.get( rootName ) ) {\n\t\t\t/**\n\t\t\t * A root with the specified name already exists.\n\t\t\t *\n\t\t\t * @error model-document-createRoot-name-exists\n\t\t\t * @param {module:engine/model/document~Document} doc\n\t\t\t * @param {String} name\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-document-createRoot-name-exists: Root with specified name already exists.',\n\t\t\t\tthis,\n\t\t\t\t{ name: rootName }\n\t\t\t);\n\t\t}\n\n\t\tconst root = new RootElement( this, elementName, rootName );\n\t\tthis.roots.add( root );\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * Removes all event listeners set by the document instance.\n\t */\n\tdestroy() {\n\t\tthis.selection.destroy();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Returns a root by its name.\n\t *\n\t * @param {String} [name='main'] A unique root name.\n\t * @returns {module:engine/model/rootelement~RootElement|null} The root registered under a given name or `null` when\n\t * there is no root with the given name.\n\t */\n\tgetRoot( name = 'main' ) {\n\t\treturn this.roots.get( name );\n\t}\n\n\t/**\n\t * Returns an array with names of all roots (without the {@link #graveyard}) added to the document.\n\t *\n\t * @returns {Array.<String>} Roots names.\n\t */\n\tgetRootNames() {\n\t\treturn Array.from( this.roots, root => root.rootName ).filter( name => name != graveyardName );\n\t}\n\n\t/**\n\t * Used to register a post-fixer callback. A post-fixer mechanism guarantees that the features\n\t * will operate on a correct model state.\n\t *\n\t * An execution of a feature may lead to an incorrect document tree state. The callbacks are used to fix the document tree after\n\t * it has changed. Post-fixers are fired just after all changes from the outermost change block were applied but\n\t * before the {@link module:engine/model/document~Document#event:change change event} is fired. If a post-fixer callback made\n\t * a change, it should return `true`. When this happens, all post-fixers are fired again to check if something else should\n\t * not be fixed in the new document tree state.\n\t *\n\t * As a parameter, a post-fixer callback receives a {@link module:engine/model/writer~Writer writer} instance connected with the\n\t * executed changes block. Thanks to that, all changes done by the callback will be added to the same\n\t * {@link module:engine/model/batch~Batch batch} (and undo step) as the original changes. This makes post-fixer changes transparent\n\t * for the user.\n\t *\n\t * An example of a post-fixer is a callback that checks if all the data were removed from the editor. If so, the\n\t * callback should add an empty paragraph so that the editor is never empty:\n\t *\n\t *\t\tdocument.registerPostFixer( writer => {\n\t *\t\t\tconst changes = document.differ.getChanges();\n\t *\n\t *\t\t\t// Check if the changes lead to an empty root in the editor.\n\t *\t\t\tfor ( const entry of changes ) {\n\t *\t\t\t\tif ( entry.type == 'remove' && entry.position.root.isEmpty ) {\n\t *\t\t\t\t\twriter.insertElement( 'paragraph', entry.position.root, 0 );\n\t *\n\t *\t\t\t\t\t// It is fine to return early, even if multiple roots would need to be fixed.\n\t *\t\t\t\t\t// All post-fixers will be fired again, so if there are more empty roots, those will be fixed, too.\n\t *\t\t\t\t\treturn true;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @param {Function} postFixer\n\t */\n\tregisterPostFixer( postFixer ) {\n\t\tthis._postFixers.add( postFixer );\n\t}\n\n\t/**\n\t * A custom `toJSON()` method to solve child-parent circular dependencies.\n\t *\n\t * @returns {Object} A clone of this object with the document property changed to a string.\n\t */\n\ttoJSON() {\n\t\tconst json = clone( this );\n\n\t\t// Due to circular references we need to remove parent reference.\n\t\tjson.selection = '[engine.model.DocumentSelection]';\n\t\tjson.model = '[engine.model.Model]';\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Check if there were any changes done on document, and if so, call post-fixers,\n\t * fire `change` event for features and conversion and then reset the differ.\n\t * Fire `change:data` event when at least one operation or buffered marker changes the data.\n\t *\n\t * @protected\n\t * @fires change\n\t * @fires change:data\n\t * @param {module:engine/model/writer~Writer} writer The writer on which post-fixers will be called.\n\t */\n\t_handleChangeBlock( writer ) {\n\t\tif ( this._hasDocumentChangedFromTheLastChangeBlock() ) {\n\t\t\tthis._callPostFixers( writer );\n\n\t\t\t// Refresh selection attributes according to the final position in the model after the change.\n\t\t\tthis.selection.refresh();\n\n\t\t\tif ( this.differ.hasDataChanges() ) {\n\t\t\t\tthis.fire( 'change:data', writer.batch );\n\t\t\t} else {\n\t\t\t\tthis.fire( 'change', writer.batch );\n\t\t\t}\n\n\t\t\t// Theoretically, it is not necessary to refresh selection after change event because\n\t\t\t// post-fixers are the last who should change the model, but just in case...\n\t\t\tthis.selection.refresh();\n\n\t\t\tthis.differ.reset();\n\t\t}\n\n\t\tthis._hasSelectionChangedFromTheLastChangeBlock = false;\n\t}\n\n\t/**\n\t * Returns whether there is a buffered change or if the selection has changed from the last\n\t * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()` block}\n\t * or {@link module:engine/model/model~Model#change `change()` block}.\n\t *\n\t * @protected\n\t * @returns {Boolean} Returns `true` if document has changed from the last `change()` or `enqueueChange()` block.\n\t */\n\t_hasDocumentChangedFromTheLastChangeBlock() {\n\t\treturn !this.differ.isEmpty || this._hasSelectionChangedFromTheLastChangeBlock;\n\t}\n\n\t/**\n\t * Returns the default root for this document which is either the first root that was added to the document using\n\t * {@link #createRoot} or the {@link #graveyard graveyard root} if no other roots were created.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/rootelement~RootElement} The default root for this document.\n\t */\n\t_getDefaultRoot() {\n\t\tfor ( const root of this.roots ) {\n\t\t\tif ( root !== this.graveyard ) {\n\t\t\t\treturn root;\n\t\t\t}\n\t\t}\n\n\t\treturn this.graveyard;\n\t}\n\n\t/**\n\t * Returns the default range for this selection. The default range is a collapsed range that starts and ends\n\t * at the beginning of this selection's document {@link #_getDefaultRoot default root}.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getDefaultRange() {\n\t\tconst defaultRoot = this._getDefaultRoot();\n\t\tconst model = this.model;\n\t\tconst schema = model.schema;\n\n\t\t// Find the first position where the selection can be put.\n\t\tconst position = model.createPositionFromPath( defaultRoot, [ 0 ] );\n\t\tconst nearestRange = schema.getNearestSelectionRange( position );\n\n\t\t// If valid selection range is not found - return range collapsed at the beginning of the root.\n\t\treturn nearestRange || model.createRange( position );\n\t}\n\n\t/**\n\t * Checks whether a given {@link module:engine/model/range~Range range} is a valid range for\n\t * the {@link #selection document's selection}.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range A range to check.\n\t * @returns {Boolean} `true` if `range` is valid, `false` otherwise.\n\t */\n\t_validateSelectionRange( range ) {\n\t\treturn validateTextNodePosition( range.start ) && validateTextNodePosition( range.end );\n\t}\n\n\t/**\n\t * Performs post-fixer loops. Executes post-fixer callbacks as long as none of them has done any changes to the model.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer The writer on which post-fixer callbacks will be called.\n\t */\n\t_callPostFixers( writer ) {\n\t\tlet wasFixed = false;\n\n\t\tdo {\n\t\t\tfor ( const callback of this._postFixers ) {\n\t\t\t\t// Ensure selection attributes are up to date before each post-fixer.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1673.\n\t\t\t\t//\n\t\t\t\t// It might be good to refresh the selection after each operation but at the moment it leads\n\t\t\t\t// to losing attributes for composition or and spell checking\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-typing/issues/188\n\t\t\t\tthis.selection.refresh();\n\n\t\t\t\twasFixed = callback( writer );\n\n\t\t\t\tif ( wasFixed ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} while ( wasFixed );\n\t}\n\n\t/**\n\t * Fired after each {@link module:engine/model/model~Model#enqueueChange `enqueueChange()` block} or the outermost\n\t * {@link module:engine/model/model~Model#change `change()` block} was executed and the document was changed\n\t * during that block's execution.\n\t *\n\t * The changes which this event will cover include:\n\t *\n\t * * document structure changes,\n\t * * selection changes,\n\t * * marker changes.\n\t *\n\t * If you want to be notified about all these changes, then simply listen to this event like this:\n\t *\n\t *\t\tmodel.document.on( 'change', () => {\n\t *\t\t\tconsole.log( 'The document has changed!' );\n\t *\t\t} );\n\t *\n\t * If, however, you only want to be notified about the data changes, then use the\n\t * {@link module:engine/model/document~Document#event:change:data change:data} event,\n\t * which is fired for document structure changes and marker changes (which affects the data).\n\t *\n\t *\t\tmodel.document.on( 'change:data', () => {\n\t *\t\t\tconsole.log( 'The data has changed!' );\n\t *\t\t} );\n\t *\n\t * @event change\n\t * @param {module:engine/model/batch~Batch} batch The batch that was used in the executed changes block.\n\t */\n\n\t/**\n\t * It is a narrower version of the {@link #event:change} event. It is fired for changes which\n\t * affect the editor data. This is:\n\t *\n\t * * document structure changes,\n\t * * marker changes (which affects the data).\n\t *\n\t * If you want to be notified about the data changes, then listen to this event:\n\t *\n\t *\t\tmodel.document.on( 'change:data', () => {\n\t *\t\t\tconsole.log( 'The data has changed!' );\n\t *\t\t} );\n\t *\n\t * If you would like to listen to all document changes, then check out the\n\t * {@link module:engine/model/document~Document#event:change change} event.\n\t *\n\t * @event change:data\n\t * @param {module:engine/model/batch~Batch} batch The batch that was used in the executed changes block.\n\t */\n\n\t// @if CK_DEBUG_ENGINE // log( version = null ) {\n\t// @if CK_DEBUG_ENGINE // \tversion = version === null ? this.version : version;\n\t// @if CK_DEBUG_ENGINE // \tlogDocument( this, version );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( Document, EmitterMixin );\n\n// Checks whether given range boundary position is valid for document selection, meaning that is not between\n// unicode surrogate pairs or base character and combining marks.\nfunction validateTextNodePosition( rangeBoundary ) {\n\tconst textNode = rangeBoundary.textNode;\n\n\tif ( textNode ) {\n\t\tconst data = textNode.data;\n\t\tconst offset = rangeBoundary.offset - textNode.startOffset;\n\n\t\treturn !isInsideSurrogatePair( data, offset ) && !isInsideCombinedSymbol( data, offset );\n\t}\n\n\treturn true;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/markercollection\n */\n\nimport LiveRange from './liverange';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The collection of all {@link module:engine/model/markercollection~Marker markers} attached to the document.\n * It lets you {@link module:engine/model/markercollection~MarkerCollection#get get} markers or track them using\n * {@link module:engine/model/markercollection~MarkerCollection#event:update} event.\n *\n * To create, change or remove makers use {@link module:engine/model/writer~Writer model writers'} methods:\n * {@link module:engine/model/writer~Writer#addMarker} or {@link module:engine/model/writer~Writer#removeMarker}. Since\n * the writer is the only proper way to change the data model it is not possible to change markers directly using this\n * collection. All markers created by the writer will be automatically added to this collection.\n *\n * By default there is one marker collection available as {@link module:engine/model/model~Model#markers model property}.\n *\n * @see module:engine/model/markercollection~Marker\n */\nexport default class MarkerCollection {\n\t/**\n\t * Creates a markers collection.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Stores {@link ~Marker markers} added to the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} #_markers\n\t\t */\n\t\tthis._markers = new Map();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link ~Marker markers} added to the collection.\n\t *\n\t * @returns {Iterable}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._markers.values();\n\t}\n\n\t/**\n\t * Checks if marker with given `markerName` is in the collection.\n\t *\n\t * @param {String} markerName Marker name.\n\t * @returns {Boolean} `true` if marker with given `markerName` is in the collection, `false` otherwise.\n\t */\n\thas( markerName ) {\n\t\treturn this._markers.has( markerName );\n\t}\n\n\t/**\n\t * Returns {@link ~Marker marker} with given `markerName`.\n\t *\n\t * @param {String} markerName Name of marker to get.\n\t * @returns {module:engine/model/markercollection~Marker|null} Marker with given name or `null` if such marker was\n\t * not added to the collection.\n\t */\n\tget( markerName ) {\n\t\treturn this._markers.get( markerName ) || null;\n\t}\n\n\t/**\n\t * Creates and adds a {@link ~Marker marker} to the `MarkerCollection` with given name on given\n\t * {@link module:engine/model/range~Range range}.\n\t *\n\t * If `MarkerCollection` already had a marker with given name (or {@link ~Marker marker} was passed), the marker in\n\t * collection is updated and {@link module:engine/model/markercollection~MarkerCollection#event:update} event is fired\n\t * but only if there was a change (marker range or {@link module:engine/model/markercollection~Marker#managedUsingOperations}\n\t * flag has changed.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String|module:engine/model/markercollection~Marker} markerOrName Name of marker to set or marker instance to update.\n\t * @param {module:engine/model/range~Range} range Marker range.\n\t * @param {Boolean} [managedUsingOperations=false] Specifies whether the marker is managed using operations.\n\t * @param {Boolean} [affectsData=false] Specifies whether the marker affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t * @returns {module:engine/model/markercollection~Marker} `Marker` instance which was added or updated.\n\t */\n\t_set( markerOrName, range, managedUsingOperations = false, affectsData = false ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst oldMarker = this._markers.get( markerName );\n\n\t\tif ( oldMarker ) {\n\t\t\tconst oldRange = oldMarker.getRange();\n\t\t\tlet hasChanged = false;\n\n\t\t\tif ( !oldRange.isEqual( range ) ) {\n\t\t\t\toldMarker._attachLiveRange( LiveRange.fromRange( range ) );\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( managedUsingOperations != oldMarker.managedUsingOperations ) {\n\t\t\t\toldMarker._managedUsingOperations = managedUsingOperations;\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( typeof affectsData === 'boolean' && affectsData != oldMarker.affectsData ) {\n\t\t\t\toldMarker._affectsData = affectsData;\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( hasChanged ) {\n\t\t\t\tthis.fire( 'update:' + markerName, oldMarker, oldRange, range );\n\t\t\t}\n\n\t\t\treturn oldMarker;\n\t\t}\n\n\t\tconst liveRange = LiveRange.fromRange( range );\n\t\tconst marker = new Marker( markerName, liveRange, managedUsingOperations, affectsData );\n\n\t\tthis._markers.set( markerName, marker );\n\t\tthis.fire( 'update:' + markerName, marker, null, range );\n\n\t\treturn marker;\n\t}\n\n\t/**\n\t * Removes given {@link ~Marker marker} or a marker with given name from the `MarkerCollection`.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String} markerOrName Marker or name of a marker to remove.\n\t * @returns {Boolean} `true` if marker was found and removed, `false` otherwise.\n\t */\n\t_remove( markerOrName ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst oldMarker = this._markers.get( markerName );\n\n\t\tif ( oldMarker ) {\n\t\t\tthis._markers.delete( markerName );\n\t\t\tthis.fire( 'update:' + markerName, oldMarker, oldMarker.getRange(), null );\n\n\t\t\tthis._destroyMarker( oldMarker );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Fires an {@link module:engine/model/markercollection~MarkerCollection#event:update} event for the given {@link ~Marker marker}\n\t * but does not change the marker. Useful to force {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher downcast\n\t * conversion} for the marker.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String} markerOrName Marker or name of a marker to refresh.\n\t */\n\t_refresh( markerOrName ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst marker = this._markers.get( markerName );\n\n\t\tif ( !marker ) {\n\t\t\tthrow new CKEditorError( 'markercollection-refresh-marker-not-exists: Marker with provided name does not exists.', this );\n\t\t}\n\n\t\tconst range = marker.getRange();\n\n\t\tthis.fire( 'update:' + markerName, marker, range, range, marker.managedUsingOperations, marker.affectsData );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over all markers, which ranges contain given {@link module:engine/model/position~Position position}.\n\t *\n\t * @param {module:engine/model/position~Position} position\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersAtPosition( position ) {\n\t\tfor ( const marker of this ) {\n\t\t\tif ( marker.getRange().containsPosition( position ) ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns iterator that iterates over all markers, which intersects with given {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {module:engine/model/range~Range} range\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersIntersectingRange( range ) {\n\t\tfor ( const marker of this ) {\n\t\t\tif ( marker.getRange().getIntersection( range ) !== null ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Destroys marker collection and all markers inside it.\n\t */\n\tdestroy() {\n\t\tfor ( const marker of this._markers.values() ) {\n\t\t\tthis._destroyMarker( marker );\n\t\t}\n\n\t\tthis._markers = null;\n\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Iterates over all markers that starts with given `prefix`.\n\t *\n\t *\t\tconst markerFooA = markersCollection.set( 'foo:a', rangeFooA );\n\t *\t\tconst markerFooB = markersCollection.set( 'foo:b', rangeFooB );\n\t *\t\tconst markerBarA = markersCollection.set( 'bar:a', rangeBarA );\n\t *\t\tconst markerFooBarA = markersCollection.set( 'foobar:a', rangeFooBarA );\n\t *\t\tArray.from( markersCollection.getMarkersGroup( 'foo' ) ); // [ markerFooA, markerFooB ]\n\t *\t\tArray.from( markersCollection.getMarkersGroup( 'a' ) ); // []\n\t *\n\t * @param prefix\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersGroup( prefix ) {\n\t\tfor ( const marker of this._markers.values() ) {\n\t\t\tif ( marker.name.startsWith( prefix + ':' ) ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Destroys the marker.\n\t *\n\t * @private\n\t * @param {module:engine/model/markercollection~Marker} marker Marker to destroy.\n\t */\n\t_destroyMarker( marker ) {\n\t\tmarker.stopListening();\n\t\tmarker._detachLiveRange();\n\t}\n\n\t/**\n\t * Fired whenever marker is added, updated or removed from `MarkerCollection`.\n\t *\n\t * @event update\n\t * @param {module:engine/model/markercollection~Marker} marker Updated Marker.\n\t * @param {module:engine/model/range~Range|null} oldRange Marker range before the update. When is not defined it\n\t * means that marker is just added.\n\t * @param {module:engine/model/range~Range|null} newRange Marker range after update. When is not defined it\n\t * means that marker is just removed.\n\t */\n}\n\nmix( MarkerCollection, EmitterMixin );\n\n/**\n * `Marker` is a continuous parts of model (like a range), is named and represent some kind of information about marked\n * part of model document. In contrary to {@link module:engine/model/node~Node nodes}, which are building blocks of\n * model document tree, markers are not stored directly in document tree but in\n * {@link module:engine/model/model~Model#markers model markers' collection}. Still, they are document data, by giving\n * additional meaning to the part of a model document between marker start and marker end.\n *\n * In this sense, markers are similar to adding and converting attributes on nodes. The difference is that attribute is\n * connected with a given node (e.g. a character is bold no matter if it gets moved or content around it changes).\n * Markers on the other hand are continuous ranges and are characterized by their start and end position. This means that\n * any character in the marker is marked by the marker. For example, if a character is moved outside of marker it stops being\n * \"special\" and the marker is shrunk. Similarly, when a character is moved into the marker from other place in document\n * model, it starts being \"special\" and the marker is enlarged.\n *\n * Another upside of markers is that finding marked part of document is fast and easy. Using attributes to mark some nodes\n * and then trying to find that part of document would require traversing whole document tree. Marker gives instant access\n * to the range which it is marking at the moment.\n *\n * Markers are built from a name and a range.\n *\n * Range of the marker is updated automatically when document changes, using\n * {@link module:engine/model/liverange~LiveRange live range} mechanism.\n *\n * Name is used to group and identify markers. Names have to be unique, but markers can be grouped by\n * using common prefixes, separated with `:`, for example: `user:john` or `search:3`. That's useful in term of creating\n * namespaces for custom elements (e.g. comments, highlights). You can use this prefixes in\n * {@link module:engine/model/markercollection~MarkerCollection#event:update} listeners to listen on changes in a group of markers.\n * For instance: `model.markers.on( 'update:user', callback );` will be called whenever any `user:*` markers changes.\n *\n * There are two types of markers.\n *\n * 1. Markers managed directly, without using operations. They are added directly by {@link module:engine/model/writer~Writer}\n * to the {@link module:engine/model/markercollection~MarkerCollection} without any additional mechanism. They can be used\n * as bookmarks or visual markers. They are great for showing results of the find, or select link when the focus is in the input.\n *\n * 1. Markers managed using operations. These markers are also stored in {@link module:engine/model/markercollection~MarkerCollection}\n * but changes in these markers is managed the same way all other changes in the model structure - using operations.\n * Therefore, they are handled in the undo stack and synchronized between clients if the collaboration plugin is enabled.\n * This type of markers is useful for solutions like spell checking or comments.\n *\n * Both type of them should be added / updated by {@link module:engine/model/writer~Writer#addMarker}\n * and removed by {@link module:engine/model/writer~Writer#removeMarker} methods.\n *\n *\t\tmodel.change( ( writer ) => {\n * \t\t\tconst marker = writer.addMarker( name, { range, usingOperation: true } );\n *\n * \t\t\t// ...\n *\n * \t\t\twriter.removeMarker( marker );\n *\t\t} );\n *\n * See {@link module:engine/model/writer~Writer} to find more examples.\n *\n * Since markers need to track change in the document, for efficiency reasons, it is best to create and keep as little\n * markers as possible and remove them as soon as they are not needed anymore.\n *\n * Markers can be downcasted and upcasted.\n *\n * Markers downcast happens on {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker} and\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:removeMarker} events.\n * Use {@link module:engine/conversion/downcasthelpers downcast converters} or attach a custom converter to mentioned events.\n * For {@link module:engine/controller/datacontroller~DataController data pipeline}, marker should be downcasted to an element.\n * Then, it can be upcasted back to a marker. Again, use {@link module:engine/conversion/upcasthelpers upcast converters} or\n * attach a custom converter to {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element}.\n *\n * `Marker` instances are created and destroyed only by {@link ~MarkerCollection MarkerCollection}.\n */\nclass Marker {\n\t/**\n\t * Creates a marker instance.\n\t *\n\t * @param {String} name Marker name.\n\t * @param {module:engine/model/liverange~LiveRange} liveRange Range marked by the marker.\n\t * @param {Boolean} managedUsingOperations Specifies whether the marker is managed using operations.\n\t * @param {Boolean} affectsData Specifies whether the marker affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t */\n\tconstructor( name, liveRange, managedUsingOperations, affectsData ) {\n\t\t/**\n\t\t * Marker's name.\n\t\t *\n\t\t * @readonly\n\t\t * @type {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Range marked by the marker.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:engine/model/liverange~LiveRange}\n\t\t */\n\t\tthis._liveRange = this._attachLiveRange( liveRange );\n\n\t\t/**\n\t\t * Flag indicates if the marker is managed using operations or not.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._managedUsingOperations = managedUsingOperations;\n\n\t\t/**\n\t\t * Specifies whether the marker affects the data produced by the data pipeline\n\t\t * (is persisted in the editor's data).\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._affectsData = affectsData;\n\t}\n\n\t/**\n\t * A value indicating if the marker is managed using operations.\n\t * See {@link ~Marker marker class description} to learn more about marker types.\n\t * See {@link module:engine/model/writer~Writer#addMarker}.\n\t *\n\t * @returns {Boolean}\n\t */\n\tget managedUsingOperations() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._managedUsingOperations;\n\t}\n\n\t/**\n\t * A value indicating if the marker changes the data.\n\t *\n\t * @returns {Boolean}\n\t */\n\tget affectsData() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._affectsData;\n\t}\n\n\t/**\n\t * Returns current marker start position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetStart() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.start.clone();\n\t}\n\n\t/**\n\t * Returns current marker end position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetEnd() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.end.clone();\n\t}\n\n\t/**\n\t * Returns a range that represents the current state of the marker.\n\t *\n\t * Keep in mind that returned value is a {@link module:engine/model/range~Range Range}, not a\n\t * {@link module:engine/model/liverange~LiveRange LiveRange}. This means that it is up-to-date and relevant only\n\t * until next model document change. Do not store values returned by this method. Instead, store {@link ~Marker#name}\n\t * and get `Marker` instance from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection} every\n\t * time there is a need to read marker properties. This will guarantee that the marker has not been removed and\n\t * that it's data is up-to-date.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tgetRange() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.toRange();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tmarker.is( 'marker' ); // -> true\n\t *\t\tmarker.is( 'model:marker' ); // -> true\n\t *\n\t *\t\tmarker.is( 'view:element' ); // -> false\n\t *\t\tmarker.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'marker' || type == 'model:marker';\n\t}\n\n\t/**\n\t * Binds new live range to the marker and detach the old one if is attached.\n\t *\n\t * @protected\n\t * @param {module:engine/model/liverange~LiveRange} liveRange Live range to attach\n\t * @returns {module:engine/model/liverange~LiveRange} Attached live range.\n\t */\n\t_attachLiveRange( liveRange ) {\n\t\tif ( this._liveRange ) {\n\t\t\tthis._detachLiveRange();\n\t\t}\n\n\t\t// Delegating does not work with namespaces. Alternatively, we could delegate all events (using `*`).\n\t\tliveRange.delegate( 'change:range' ).to( this );\n\t\tliveRange.delegate( 'change:content' ).to( this );\n\n\t\tthis._liveRange = liveRange;\n\n\t\treturn liveRange;\n\t}\n\n\t/**\n\t * Unbinds and destroys currently attached live range.\n\t *\n\t * @protected\n\t */\n\t_detachLiveRange() {\n\t\tthis._liveRange.stopDelegating( 'change:range', this );\n\t\tthis._liveRange.stopDelegating( 'change:content', this );\n\t\tthis._liveRange.detach();\n\t\tthis._liveRange = null;\n\t}\n\n\t/**\n\t * Fired whenever {@link ~Marker#_liveRange marker range} is changed due to changes on {@link module:engine/model/document~Document}.\n\t * This is a delegated {@link module:engine/model/liverange~LiveRange#event:change:range LiveRange change:range event}.\n\t *\n\t * When marker is removed from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection},\n\t * all event listeners listening to it should be removed. It is best to do it on\n\t * {@link module:engine/model/markercollection~MarkerCollection#event:update MarkerCollection update event}.\n\t *\n\t * @see module:engine/model/liverange~LiveRange#event:change:range\n\t * @event change:range\n\t * @param {module:engine/model/range~Range} oldRange\n\t * @param {Object} data\n\t */\n\n\t/**\n\t * Fired whenever change on {@link module:engine/model/document~Document} is done inside {@link ~Marker#_liveRange marker range}.\n\t * This is a delegated {@link module:engine/model/liverange~LiveRange#event:change:content LiveRange change:content event}.\n\t *\n\t * When marker is removed from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection},\n\t * all event listeners listening to it should be removed. It is best to do it on\n\t * {@link module:engine/model/markercollection~MarkerCollection#event:update MarkerCollection update event}.\n\t *\n\t * @see module:engine/model/liverange~LiveRange#event:change:content\n\t * @event change:content\n\t * @param {module:engine/model/range~Range} oldRange\n\t * @param {Object} data\n\t */\n}\n\nmix( Marker, EmitterMixin );\n\n/**\n * Cannot use a {@link module:engine/model/markercollection~MarkerCollection#destroy destroyed marker} instance.\n *\n * @error marker-destroyed\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/liveposition\n */\n\nimport Position from './position';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * `LivePosition` is a type of {@link module:engine/model/position~Position Position}\n * that updates itself as {@link module:engine/model/document~Document document}\n * is changed through operations. It may be used as a bookmark.\n *\n * **Note:** Contrary to {@link module:engine/model/position~Position}, `LivePosition` works only in roots that are\n * {@link module:engine/model/rootelement~RootElement}.\n * If {@link module:engine/model/documentfragment~DocumentFragment} is passed, error will be thrown.\n *\n * **Note:** Be very careful when dealing with `LivePosition`. Each `LivePosition` instance bind events that might\n * have to be unbound.\n * Use {@link module:engine/model/liveposition~LivePosition#detach} whenever you don't need `LivePosition` anymore.\n *\n * @extends module:engine/model/position~Position\n */\nexport default class LivePosition extends Position {\n\t/**\n\t * Creates a live position.\n\t *\n\t * @see module:engine/model/position~Position\n\t * @param {module:engine/model/rootelement~RootElement} root\n\t * @param {Array.<Number>} path\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness]\n\t */\n\tconstructor( root, path, stickiness = 'toNone' ) {\n\t\tsuper( root, path, stickiness );\n\n\t\tif ( !this.root.is( 'rootElement' ) ) {\n\t\t\t/**\n\t\t\t * LivePosition's root has to be an instance of RootElement.\n\t\t\t *\n\t\t\t * @error liveposition-root-not-rootelement\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-liveposition-root-not-rootelement: LivePosition\\'s root has to be an instance of RootElement.',\n\t\t\t\troot\n\t\t\t);\n\t\t}\n\n\t\tbindWithDocument.call( this );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by `LivePosition`. Use it whenever you don't need `LivePosition` instance\n\t * anymore (i.e. when leaving scope in which it was declared or before re-assigning variable that was\n\t * referring to it).\n\t */\n\tdetach() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tlivePosition.is( 'position' ); // -> true\n\t *\t\tlivePosition.is( 'model:position' ); // -> true\n\t *\t\tlivePosition.is( 'liveposition' ); // -> true\n\t *\t\tlivePosition.is( 'model:livePosition' ); // -> true\n\t *\n\t *\t\tlivePosition.is( 'view:position' ); // -> false\n\t *\t\tlivePosition.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'livePosition' || type == 'model:livePosition' || super.is( type );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/position~Position position instance}, which is equal to this live position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\ttoPosition() {\n\t\treturn new Position( this.root, this.path.slice(), this.stickiness );\n\t}\n\n\t/**\n\t * Creates a `LivePosition` instance that is equal to position.\n\t *\n\t * @param {module:engine/model/position~Position} position\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness]\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic fromPosition( position, stickiness ) {\n\t\treturn new this( position.root, position.path.slice(), stickiness ? stickiness : position.stickiness );\n\t}\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createAfter\n\t * @see module:engine/model/position~Position._createAfter\n\t * @param {module:engine/model/node~Node} node\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createBefore\n\t * @see module:engine/model/position~Position._createBefore\n\t * @param {module:engine/model/node~Node} node\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createAt\n\t * @see module:engine/model/position~Position._createAt\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset]\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * Fired when `LivePosition` instance is changed due to changes on {@link module:engine/model/document~Document}.\n\t *\n\t * @event module:engine/model/liveposition~LivePosition#change\n\t * @param {module:engine/model/position~Position} oldPosition Position equal to this live position before it got changed.\n\t */\n}\n\n// Binds this `LivePosition` to the {@link module:engine/model/document~Document document} that owns\n// this position's {@link module:engine/model/position~Position#root root}.\n//\n// @private\nfunction bindWithDocument() {\n\tthis.listenTo(\n\t\tthis.root.document.model,\n\t\t'applyOperation',\n\t\t( event, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\ttransform.call( this, operation );\n\t\t},\n\t\t{ priority: 'low' }\n\t);\n}\n\n// Updates this position accordingly to the updates applied to the model. Bases on change events.\n//\n// @private\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\nfunction transform( operation ) {\n\tconst result = this.getTransformedByOperation( operation );\n\n\tif ( !this.isEqual( result ) ) {\n\t\tconst oldPosition = this.toPosition();\n\n\t\tthis.path = result.path;\n\t\tthis.root = result.root;\n\n\t\tthis.fire( 'change', oldPosition );\n\t}\n}\n\nmix( LivePosition, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/insertcontent\n */\n\nimport Position from '../position';\nimport LivePosition from '../liveposition';\nimport Element from '../element';\nimport Range from '../range';\nimport DocumentSelection from '../documentselection';\nimport Selection from '../selection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Inserts content into the editor (specified selection) as one would expect the paste\n * functionality to work.\n *\n * If an instance of {@link module:engine/model/selection~Selection} is passed as `selectable` it will be modified\n * to the insertion selection (equal to a range to be selected after insertion).\n *\n * If `selectable` is not passed, the content will be inserted using the current selection of the model document.\n *\n * **Note:** Use {@link module:engine/model/model~Model#insertContent} instead of this function.\n * This function is only exposed to be reusable in algorithms which change the {@link module:engine/model/model~Model#insertContent}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which the insertion\n * should be performed.\n * @param {module:engine/model/documentfragment~DocumentFragment|module:engine/model/item~Item} content The content to insert.\n * @param {module:engine/model/selection~Selectable} [selectable=model.document.selection]\n * Selection into which the content should be inserted.\n * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n * @returns {module:engine/model/range~Range} Range which contains all the performed changes. This is a range that, if removed,\n * would return the model to the state before the insertion. If no changes were preformed by `insertContent`, returns a range collapsed\n * at the insertion position.\n */\nexport default function insertContent( model, content, selectable, placeOrOffset ) {\n\treturn model.change( writer => {\n\t\tlet selection;\n\n\t\tif ( !selectable ) {\n\t\t\tselection = model.document.selection;\n\t\t} else if ( selectable instanceof Selection || selectable instanceof DocumentSelection ) {\n\t\t\tselection = selectable;\n\t\t} else {\n\t\t\tselection = writer.createSelection( selectable, placeOrOffset );\n\t\t}\n\n\t\tconst insertionPosition = selection.getFirstPosition();\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\tmodel.deleteContent( selection, { doNotAutoparagraph: true } );\n\t\t}\n\n\t\tconst insertion = new Insertion( model, writer, insertionPosition );\n\n\t\tlet nodesToInsert;\n\n\t\tif ( content.is( 'documentFragment' ) ) {\n\t\t\tnodesToInsert = content.getChildren();\n\t\t} else {\n\t\t\tnodesToInsert = [ content ];\n\t\t}\n\n\t\tinsertion.handleNodes( nodesToInsert, {\n\t\t\t// The set of children being inserted is the only set in this context\n\t\t\t// so it's the first and last (it's a hack ;)).\n\t\t\tisFirst: true,\n\t\t\tisLast: true\n\t\t} );\n\n\t\tconst newRange = insertion.getSelectionRange();\n\n\t\t/* istanbul ignore else */\n\t\tif ( newRange ) {\n\t\t\tif ( selection instanceof DocumentSelection ) {\n\t\t\t\twriter.setSelection( newRange );\n\t\t\t} else {\n\t\t\t\tselection.setTo( newRange );\n\t\t\t}\n\t\t} else {\n\t\t\t// We are not testing else because it's a safe check for unpredictable edge cases:\n\t\t\t// an insertion without proper range to select.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Cannot determine a proper selection range after insertion.' );\n\t\t}\n\n\t\tconst affectedRange = insertion.getAffectedRange() || model.createRange( insertionPosition );\n\n\t\tinsertion.destroy();\n\n\t\treturn affectedRange;\n\t} );\n}\n\n/**\n * Utility class for performing content insertion.\n *\n * @private\n */\nclass Insertion {\n\tconstructor( model, writer, position ) {\n\t\t/**\n\t\t * The model in context of which the insertion should be performed.\n\t\t *\n\t\t * @member {module:engine/model~Model} #model\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Batch to which operations will be added.\n\t\t *\n\t\t * @member {module:engine/controller/writer~Batch} #writer\n\t\t */\n\t\tthis.writer = writer;\n\n\t\t/**\n\t\t * The position at which (or near which) the next node will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} #position\n\t\t */\n\t\tthis.position = position;\n\n\t\t/**\n\t\t * Elements with which the inserted elements can be merged.\n\t\t *\n\t\t *\t\t<p>x^</p><p>y</p> + <p>z</p> (can merge to <p>x</p>)\n\t\t *\t\t<p>x</p><p>^y</p> + <p>z</p> (can merge to <p>y</p>)\n\t\t *\t\t<p>x^y</p> + <p>z</p> (can merge to <p>xy</p> which will be split during the action,\n\t\t *\t\t\t\t\t\t\t\tso both its pieces will be added to this set)\n\t\t *\n\t\t *\n\t\t * @member {Set} #canMergeWith\n\t\t */\n\t\tthis.canMergeWith = new Set( [ this.position.parent ] );\n\n\t\t/**\n\t\t * Schema of the model.\n\t\t *\n\t\t * @member {module:engine/model/schema~Schema} #schema\n\t\t */\n\t\tthis.schema = model.schema;\n\n\t\tthis._filterAttributesOf = [];\n\n\t\t/**\n\t\t * Beginning of the affected range. See {@link module:engine/model/utils/insertcontent~Insertion#getAffectedRange}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition|null} #_affectedStart\n\t\t */\n\t\tthis._affectedStart = null;\n\n\t\t/**\n\t\t * End of the affected range. See {@link module:engine/model/utils/insertcontent~Insertion#getAffectedRange}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition|null} #_affectedEnd\n\t\t */\n\t\tthis._affectedEnd = null;\n\t}\n\n\t/**\n\t * Handles insertion of a set of nodes.\n\t *\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes to insert.\n\t * @param {Object} parentContext Context in which parent of these nodes was supposed to be inserted.\n\t * If the parent context is passed it means that the parent element was stripped (was not allowed).\n\t */\n\thandleNodes( nodes, parentContext ) {\n\t\tnodes = Array.from( nodes );\n\n\t\tfor ( let i = 0; i < nodes.length; i++ ) {\n\t\t\tconst node = nodes[ i ];\n\n\t\t\tthis._handleNode( node, {\n\t\t\t\tisFirst: i === 0 && parentContext.isFirst,\n\t\t\t\tisLast: ( i === ( nodes.length - 1 ) ) && parentContext.isLast\n\t\t\t} );\n\t\t}\n\n\t\t// TMP this will become a post-fixer.\n\t\tthis.schema.removeDisallowedAttributes( this._filterAttributesOf, this.writer );\n\t\tthis._filterAttributesOf = [];\n\t}\n\n\t/**\n\t * Returns range to be selected after insertion.\n\t * Returns `null` if there is no valid range to select after insertion.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetSelectionRange() {\n\t\tif ( this.nodeToSelect ) {\n\t\t\treturn Range._createOn( this.nodeToSelect );\n\t\t}\n\n\t\treturn this.model.schema.getNearestSelectionRange( this.position );\n\t}\n\n\t/**\n\t * Returns a range which contains all the performed changes. This is a range that, if removed, would return the model to the state\n\t * before the insertion. Returns `null` if no changes were done.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetAffectedRange() {\n\t\tif ( !this._affectedStart ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn new Range( this._affectedStart, this._affectedEnd );\n\t}\n\n\t/**\n\t * Destroys `Insertion` instance.\n\t */\n\tdestroy() {\n\t\tif ( this._affectedStart ) {\n\t\t\tthis._affectedStart.detach();\n\t\t}\n\n\t\tif ( this._affectedEnd ) {\n\t\t\tthis._affectedEnd.detach();\n\t\t}\n\t}\n\n\t/**\n\t * Handles insertion of a single node.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node\n\t * @param {Object} context\n\t * @param {Boolean} context.isFirst Whether the given node is the first one in the content to be inserted.\n\t * @param {Boolean} context.isLast Whether the given node is the last one in the content to be inserted.\n\t */\n\t_handleNode( node, context ) {\n\t\t// Let's handle object in a special way.\n\t\t// * They should never be merged with other elements.\n\t\t// * If they are not allowed in any of the selection ancestors, they could be either autoparagraphed or totally removed.\n\t\tif ( this.schema.isObject( node ) ) {\n\t\t\tthis._handleObject( node, context );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Try to find a place for the given node.\n\t\t// Split the position.parent's branch up to a point where the node can be inserted.\n\t\t// If it isn't allowed in the whole branch, then of course don't split anything.\n\t\tconst isAllowed = this._checkAndSplitToAllowedPosition( node, context );\n\n\t\tif ( !isAllowed ) {\n\t\t\tthis._handleDisallowedNode( node, context );\n\n\t\t\treturn;\n\t\t}\n\n\t\tthis._insert( node );\n\n\t\t// After the node was inserted we may try to merge it with its siblings.\n\t\t// This should happen only if it was the first and/or last of the nodes (so only with boundary nodes)\n\t\t// and only if the selection was in those elements initially.\n\t\t//\n\t\t// E.g.:\n\t\t// <p>x^</p> + <p>y</p> => <p>x</p><p>y</p> => <p>xy[]</p>\n\t\t// and:\n\t\t// <p>x^y</p> + <p>z</p> => <p>x</p>^<p>y</p> + <p>z</p> => <p>x</p><p>z</p><p>y</p> => <p>xz[]y</p>\n\t\t// but:\n\t\t// <p>x</p><p>^</p><p>z</p> + <p>y</p> => <p>x</p><p>y</p><p>z</p> (no merging)\n\t\t// <p>x</p>[<img>]<p>z</p> + <p>y</p> => <p>x</p><p>y</p><p>z</p> (no merging, note: after running deleteContents\n\t\t//\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t it's exactly the same case as above)\n\t\tthis._mergeSiblingsOf( node, context );\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/element~Element} node The object element.\n\t * @param {Object} context\n\t */\n\t_handleObject( node, context ) {\n\t\t// Try finding it a place in the tree.\n\t\tif ( this._checkAndSplitToAllowedPosition( node ) ) {\n\t\t\tthis._insert( node );\n\t\t}\n\t\t// Try autoparagraphing.\n\t\telse {\n\t\t\tthis._tryAutoparagraphing( node, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The disallowed node which needs to be handled.\n\t * @param {Object} context\n\t */\n\t_handleDisallowedNode( node, context ) {\n\t\t// If the node is an element, try inserting its children (strip the parent).\n\t\tif ( node.is( 'element' ) ) {\n\t\t\tthis.handleNodes( node.getChildren(), context );\n\t\t}\n\t\t// If text is not allowed, try autoparagraphing it.\n\t\telse {\n\t\t\tthis._tryAutoparagraphing( node, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node to insert.\n\t */\n\t_insert( node ) {\n\t\t/* istanbul ignore if */\n\t\tif ( !this.schema.checkChild( this.position, node ) ) {\n\t\t\t// Algorithm's correctness check. We should never end up here but it's good to know that we did.\n\t\t\t// Note that it would often be a silent issue if we insert node in a place where it's not allowed.\n\n\t\t\t/**\n\t\t\t * Given node cannot be inserted on the given position.\n\t\t\t *\n\t\t\t * @error insertcontent-wrong-position\n\t\t\t * @param {module:engine/model/node~Node} node Node to insert.\n\t\t\t * @param {module:engine/model/position~Position} position Position to insert the node at.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'insertcontent-wrong-position: Given node cannot be inserted on the given position.',\n\t\t\t\tthis,\n\t\t\t\t{ node, position: this.position }\n\t\t\t);\n\t\t}\n\n\t\tconst livePos = LivePosition.fromPosition( this.position, 'toNext' );\n\n\t\tthis._setAffectedBoundaries( this.position );\n\t\tthis.writer.insert( node, this.position );\n\n\t\tthis.position = livePos.toPosition();\n\t\tlivePos.detach();\n\n\t\t// The last inserted object should be selected because we can't put a collapsed selection after it.\n\t\tif ( this.schema.isObject( node ) && !this.schema.checkChild( this.position, '$text' ) ) {\n\t\t\tthis.nodeToSelect = node;\n\t\t} else {\n\t\t\tthis.nodeToSelect = null;\n\t\t}\n\n\t\tthis._filterAttributesOf.push( node );\n\t}\n\n\t/**\n\t * Sets `_affectedStart` and `_affectedEnd` to the given `position`. Should be used before a change is done during insertion process to\n\t * mark the affected range.\n\t *\n\t * This method is used before inserting a node or splitting a parent node. `_affectedStart` and `_affectedEnd` are also changed\n\t * during merging, but the logic there is more complicated so it is left out of this function.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position\n\t */\n\t_setAffectedBoundaries( position ) {\n\t\t// Set affected boundaries stickiness so that those position will \"expand\" when something is inserted in between them:\n\t\t// <paragraph>Foo][bar</paragraph> -> <paragraph>Foo]xx[bar</paragraph>\n\t\t// This is why it cannot be a range but two separate positions.\n\t\tif ( !this._affectedStart ) {\n\t\t\tthis._affectedStart = LivePosition.fromPosition( position, 'toPrevious' );\n\t\t}\n\n\t\t// If `_affectedEnd` is before the new boundary position, expand `_affectedEnd`. This can happen if first inserted node was\n\t\t// inserted into the parent but the next node is moved-out of that parent:\n\t\t// (1) <paragraph>Foo][</paragraph> -> <paragraph>Foo]xx[</paragraph>\n\t\t// (2) <paragraph>Foo]xx[</paragraph> -> <paragraph>Foo]xx</paragraph><widget></widget>[\n\t\tif ( !this._affectedEnd || this._affectedEnd.isBefore( position ) ) {\n\t\t\tif ( this._affectedEnd ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t}\n\n\t\t\tthis._affectedEnd = LivePosition.fromPosition( position, 'toNext' );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t */\n\t_mergeSiblingsOf( node, context ) {\n\t\tif ( !( node instanceof Element ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst mergeLeft = this._canMergeLeft( node, context );\n\t\tconst mergeRight = this._canMergeRight( node, context );\n\t\tconst mergePosLeft = LivePosition._createBefore( node );\n\t\tmergePosLeft.stickiness = 'toNext';\n\t\tconst mergePosRight = LivePosition._createAfter( node );\n\t\tmergePosRight.stickiness = 'toNext';\n\n\t\tif ( mergeLeft ) {\n\t\t\tconst livePosition = LivePosition.fromPosition( this.position );\n\t\t\tlivePosition.stickiness = 'toNext';\n\n\t\t\t// If `_affectedStart` is sames as merge position, it means that the element \"marked\" by `_affectedStart` is going to be\n\t\t\t// removed and its contents will be moved. This won't transform `LivePosition` so `_affectedStart` needs to be moved\n\t\t\t// by hand to properly reflect affected range. (Due to `_affectedStart` and `_affectedEnd` stickiness, the \"range\" is\n\t\t\t// shown as `][`).\n\t\t\t//\n\t\t\t// Example - insert `<paragraph>Abc</paragraph><paragraph>Xyz</paragraph>` at the end of `<paragraph>Foo^</paragraph>`:\n\t\t\t//\n\t\t\t// <paragraph>Foo</paragraph><paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo</paragraph>]<paragraph>Abc</paragraph><paragraph>Xyz</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc</paragraph><paragraph>Xyz</paragraph>[<paragraph>Bar</paragraph>\n\t\t\t//\n\t\t\t// Note, that if we are here then something must have been inserted, so `_affectedStart` and `_affectedEnd` have to be set.\n\t\t\tif ( this._affectedStart.isEqual( mergePosLeft ) ) {\n\t\t\t\tthis._affectedStart.detach();\n\t\t\t\tthis._affectedStart = LivePosition._createAt( mergePosLeft.nodeBefore, 'end', 'toPrevious' );\n\t\t\t}\n\n\t\t\tthis.writer.merge( mergePosLeft );\n\n\t\t\t// If only one element (the merged one) is in the \"affected range\", also move the affected range end appropriately.\n\t\t\t//\n\t\t\t// Example - insert `<paragraph>Abc</paragraph>` at the of `<paragraph>Foo^</paragraph>`:\n\t\t\t//\n\t\t\t// <paragraph>Foo</paragraph><paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo</paragraph>]<paragraph>Abc</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc[</paragraph><paragraph>Bar</paragraph>\n\t\t\tif ( mergePosLeft.isEqual( this._affectedEnd ) && context.isLast ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t\tthis._affectedEnd = LivePosition._createAt( mergePosLeft.nodeBefore, 'end', 'toNext' );\n\t\t\t}\n\n\t\t\tthis.position = livePosition.toPosition();\n\t\t\tlivePosition.detach();\n\t\t}\n\n\t\tif ( mergeRight ) {\n\t\t\t/* istanbul ignore if */\n\t\t\tif ( !this.position.isEqual( mergePosRight ) ) {\n\t\t\t\t// Algorithm's correctness check. We should never end up here but it's good to know that we did.\n\t\t\t\t// At this point the insertion position should be after the node we'll merge. If it isn't,\n\t\t\t\t// it should need to be secured as in the left merge case.\n\t\t\t\t/**\n\t\t\t\t * An internal error occured during merging insertion content with siblings.\n\t\t\t\t * The insertion position should equal to the merge position.\n\t\t\t\t *\n\t\t\t\t * @error insertcontent-invalid-insertion-position\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'insertcontent-invalid-insertion-position', this );\n\t\t\t}\n\n\t\t\t// Move the position to the previous node, so it isn't moved to the graveyard on merge.\n\t\t\t// <p>x</p>[]<p>y</p> => <p>x[]</p><p>y</p>\n\t\t\tthis.position = Position._createAt( mergePosRight.nodeBefore, 'end' );\n\n\t\t\t// OK: <p>xx[]</p> + <p>yy</p> => <p>xx[]yy</p> (when sticks to previous)\n\t\t\t// NOK: <p>xx[]</p> + <p>yy</p> => <p>xxyy[]</p> (when sticks to next)\n\t\t\tconst livePosition = LivePosition.fromPosition( this.position, 'toPrevious' );\n\n\t\t\t// See comment above on moving `_affectedStart`.\n\t\t\tif ( this._affectedEnd.isEqual( mergePosRight ) ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t\tthis._affectedEnd = LivePosition._createAt( mergePosRight.nodeBefore, 'end', 'toNext' );\n\t\t\t}\n\n\t\t\tthis.writer.merge( mergePosRight );\n\n\t\t\t// See comment above on moving `_affectedStart`.\n\t\t\tif ( mergePosRight.getShiftedBy( -1 ).isEqual( this._affectedStart ) && context.isFirst ) {\n\t\t\t\tthis._affectedStart.detach();\n\t\t\t\tthis._affectedStart = LivePosition._createAt( mergePosRight.nodeBefore, 0, 'toPrevious' );\n\t\t\t}\n\n\t\t\tthis.position = livePosition.toPosition();\n\t\t\tlivePosition.detach();\n\t\t}\n\n\t\tif ( mergeLeft || mergeRight ) {\n\t\t\t// After merge elements that were marked by _insert() to be filtered might be gone so\n\t\t\t// we need to mark the new container.\n\t\t\tthis._filterAttributesOf.push( this.position.parent );\n\t\t}\n\n\t\tmergePosLeft.detach();\n\t\tmergePosRight.detach();\n\t}\n\n\t/**\n\t * Checks whether specified node can be merged with previous sibling element.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t * @returns {Boolean}\n\t */\n\t_canMergeLeft( node, context ) {\n\t\tconst previousSibling = node.previousSibling;\n\n\t\treturn context.isFirst &&\n\t\t\t( previousSibling instanceof Element ) &&\n\t\t\tthis.canMergeWith.has( previousSibling ) &&\n\t\t\tthis.model.schema.checkMerge( previousSibling, node );\n\t}\n\n\t/**\n\t * Checks whether specified node can be merged with next sibling element.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t * @returns {Boolean}\n\t */\n\t_canMergeRight( node, context ) {\n\t\tconst nextSibling = node.nextSibling;\n\n\t\treturn context.isLast &&\n\t\t\t( nextSibling instanceof Element ) &&\n\t\t\tthis.canMergeWith.has( nextSibling ) &&\n\t\t\tthis.model.schema.checkMerge( node, nextSibling );\n\t}\n\n\t/**\n\t * Tries wrapping the node in a new paragraph and inserting it this way.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which needs to be autoparagraphed.\n\t * @param {Object} context\n\t */\n\t_tryAutoparagraphing( node, context ) {\n\t\tconst paragraph = this.writer.createElement( 'paragraph' );\n\n\t\t// Do not autoparagraph if the paragraph won't be allowed there,\n\t\t// cause that would lead to an infinite loop. The paragraph would be rejected in\n\t\t// the next _handleNode() call and we'd be here again.\n\t\tif ( this._getAllowedIn( paragraph, this.position.parent ) && this.schema.checkChild( paragraph, node ) ) {\n\t\t\tparagraph._appendChild( node );\n\t\t\tthis._handleNode( paragraph, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node\n\t * @returns {Boolean} Whether an allowed position was found.\n\t * `false` is returned if the node isn't allowed at any position up in the tree, `true` if was.\n\t */\n\t_checkAndSplitToAllowedPosition( node ) {\n\t\tconst allowedIn = this._getAllowedIn( node, this.position.parent );\n\n\t\tif ( !allowedIn ) {\n\t\t\treturn false;\n\t\t}\n\n\t\twhile ( allowedIn != this.position.parent ) {\n\t\t\t// If a parent which we'd need to leave is a limit element, break.\n\t\t\tif ( this.schema.isLimit( this.position.parent ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\n\t\t\tif ( this.position.isAtStart ) {\n\t\t\t\t// If insertion position is at the beginning of the parent, move it out instead of splitting.\n\t\t\t\t// <p>^Foo</p> -> ^<p>Foo</p>\n\t\t\t\tconst parent = this.position.parent;\n\n\t\t\t\tthis.position = this.writer.createPositionBefore( parent );\n\n\t\t\t\t// Special case – parent is empty (<p>^</p>).\n\t\t\t\t//\n\t\t\t\t// 1. parent.isEmpty\n\t\t\t\t// We can remove the element after moving insertion position out of it.\n\t\t\t\t//\n\t\t\t\t// 2. parent.parent === allowedIn\n\t\t\t\t// However parent should remain in place when allowed element is above limit element in document tree.\n\t\t\t\t// For example there shouldn't be allowed to remove empty paragraph from tableCell, when is pasted\n\t\t\t\t// content allowed in $root.\n\t\t\t\tif ( parent.isEmpty && parent.parent === allowedIn ) {\n\t\t\t\t\tthis.writer.remove( parent );\n\t\t\t\t}\n\t\t\t} else if ( this.position.isAtEnd ) {\n\t\t\t\t// If insertion position is at the end of the parent, move it out instead of splitting.\n\t\t\t\t// <p>Foo^</p> -> <p>Foo</p>^\n\t\t\t\tthis.position = this.writer.createPositionAfter( this.position.parent );\n\t\t\t} else {\n\t\t\t\tconst tempPos = this.writer.createPositionAfter( this.position.parent );\n\n\t\t\t\tthis._setAffectedBoundaries( this.position );\n\t\t\t\tthis.writer.split( this.position );\n\n\t\t\t\tthis.position = tempPos;\n\n\t\t\t\tthis.canMergeWith.add( this.position.nodeAfter );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Gets the element in which the given node is allowed. It checks the passed element and all its ancestors.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node to check.\n\t * @param {module:engine/model/element~Element} element The element in which the node's correctness should be checked.\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\t_getAllowedIn( node, element ) {\n\t\tif ( this.schema.checkChild( element, node ) ) {\n\t\t\treturn element;\n\t\t}\n\n\t\tif ( element.parent ) {\n\t\t\treturn this._getAllowedIn( node, element.parent );\n\t\t}\n\n\t\treturn null;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/deletecontent\n */\n\nimport LivePosition from '../liveposition';\nimport Range from '../range';\nimport DocumentSelection from '../documentselection';\n\n/**\n * Deletes content of the selection and merge siblings. The resulting selection is always collapsed.\n *\n * **Note:** Use {@link module:engine/model/model~Model#deleteContent} instead of this function.\n * This function is only exposed to be reusable in algorithms\n * which change the {@link module:engine/model/model~Model#deleteContent}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which the insertion\n * should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * Selection of which the content should be deleted.\n * @param {Object} [options]\n * @param {Boolean} [options.leaveUnmerged=false] Whether to merge elements after removing the content of the selection.\n *\n * For example `<heading>x[x</heading><paragraph>y]y</paragraph>` will become:\n *\n * * `<heading>x^y</heading>` with the option disabled (`leaveUnmerged == false`)\n * * `<heading>x^</heading><paragraph>y</paragraph>` with enabled (`leaveUnmerged == true`).\n *\n * Note: {@link module:engine/model/schema~Schema#isObject object} and {@link module:engine/model/schema~Schema#isLimit limit}\n * elements will not be merged.\n *\n * @param {Boolean} [options.doNotResetEntireContent=false] Whether to skip replacing the entire content with a\n * paragraph when the entire content was selected.\n *\n * For example `<heading>[x</heading><paragraph>y]</paragraph>` will become:\n *\n * * `<paragraph>^</paragraph>` with the option disabled (`doNotResetEntireContent == false`)\n * * `<heading>^</heading>` with enabled (`doNotResetEntireContent == true`).\n *\n * @param {Boolean} [options.doNotAutoparagraph=false] Whether to create a paragraph if after content deletion selection is moved\n * to a place where text cannot be inserted.\n *\n * For example `<paragraph>x</paragraph>[<image src=\"foo.jpg\"></image>]` will become:\n *\n * * `<paragraph>x</paragraph><paragraph>[]</paragraph>` with the option disabled (`doNotAutoparagraph == false`)\n * * `<paragraph>x[]</paragraph>` with the option enabled (`doNotAutoparagraph == true`).\n *\n * **Note:** if there is no valid position for the selection, the paragraph will always be created:\n *\n * `[<image src=\"foo.jpg\"></image>]` -> `<paragraph>[]</paragraph>`.\n */\nexport default function deleteContent( model, selection, options = {} ) {\n\tif ( selection.isCollapsed ) {\n\t\treturn;\n\t}\n\n\tconst selRange = selection.getFirstRange();\n\n\t// If the selection is already removed, don't do anything.\n\tif ( selRange.root.rootName == '$graveyard' ) {\n\t\treturn;\n\t}\n\n\tconst schema = model.schema;\n\n\tmodel.change( writer => {\n\t\t// 1. Replace the entire content with paragraph.\n\t\t// See: https://github.com/ckeditor/ckeditor5-engine/issues/1012#issuecomment-315017594.\n\t\tif ( !options.doNotResetEntireContent && shouldEntireContentBeReplacedWithParagraph( schema, selection ) ) {\n\t\t\treplaceEntireContentWithParagraph( writer, selection, schema );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst startPos = selRange.start;\n\t\tconst endPos = LivePosition.fromPosition( selRange.end, 'toNext' );\n\n\t\t// 2. Remove the content if there is any.\n\t\tif ( !selRange.start.isTouching( selRange.end ) ) {\n\t\t\twriter.remove( selRange );\n\t\t}\n\n\t\t// 3. Merge elements in the right branch to the elements in the left branch.\n\t\t// The only reasonable (in terms of data and selection correctness) case in which we need to do that is:\n\t\t//\n\t\t// <heading type=1>Fo[</heading><paragraph>]ar</paragraph> => <heading type=1>Fo^ar</heading>\n\t\t//\n\t\t// However, the algorithm supports also merging deeper structures (up to the depth of the shallower branch),\n\t\t// as it's hard to imagine what should actually be the default behavior. Usually, specific features will\n\t\t// want to override that behavior anyway.\n\t\tif ( !options.leaveUnmerged ) {\n\t\t\tmergeBranches( writer, startPos, endPos );\n\n\t\t\t// TMP this will be replaced with a postfixer.\n\t\t\t// We need to check and strip disallowed attributes in all nested nodes because after merge\n\t\t\t// some attributes could end up in a path where are disallowed.\n\t\t\t//\n\t\t\t// e.g. bold is disallowed for <H1>\n\t\t\t// <h1>Fo{o</h1><p>b}a<b>r</b><p> -> <h1>Fo{}a<b>r</b><h1> -> <h1>Fo{}ar<h1>.\n\t\t\tschema.removeDisallowedAttributes( startPos.parent.getChildren(), writer );\n\t\t}\n\n\t\tcollapseSelectionAt( writer, selection, startPos );\n\n\t\t// 4. Add a paragraph to set selection in it.\n\t\t// Check if a text is allowed in the new container. If not, try to create a new paragraph (if it's allowed here).\n\t\tif ( shouldAutoparagraph( schema, startPos ) ) {\n\t\t\t// If auto-paragraphing is off, find the closest valid selection range and collapse the selection there.\n\t\t\t// If there is no valid selection range, create paragraph anyway and set selection there.\n\t\t\tconst validSelectionRange = schema.getNearestSelectionRange( startPos );\n\n\t\t\tif ( options.doNotAutoparagraph && validSelectionRange ) {\n\t\t\t\tcollapseSelectionAt( writer, selection, validSelectionRange );\n\t\t\t} else {\n\t\t\t\tinsertParagraph( writer, startPos, selection );\n\t\t\t}\n\t\t}\n\n\t\tendPos.detach();\n\t} );\n}\n\n// This function is a result of reaching the Ballmer's peak for just the right amount of time.\n// Even I had troubles documenting it after a while and after reading it again I couldn't believe that it really works.\nfunction mergeBranches( writer, startPos, endPos ) {\n\tconst startParent = startPos.parent;\n\tconst endParent = endPos.parent;\n\n\t// If both positions ended up in the same parent, then there's nothing more to merge:\n\t// <$root><p>x[]</p><p>{}y</p></$root> => <$root><p>xy</p>[]{}</$root>\n\tif ( startParent == endParent ) {\n\t\treturn;\n\t}\n\n\t// If one of the positions is a limit element, then there's nothing to merge because we don't want to cross the limit boundaries.\n\tif ( writer.model.schema.isLimit( startParent ) || writer.model.schema.isLimit( endParent ) ) {\n\t\treturn;\n\t}\n\n\t// Check if operations we'll need to do won't need to cross object or limit boundaries.\n\t// E.g., we can't merge endParent into startParent in this case:\n\t// <limit><startParent>x[]</startParent></limit><endParent>{}</endParent>\n\tif ( !checkCanBeMerged( startPos, endPos, writer.model.schema ) ) {\n\t\treturn;\n\t}\n\n\t// Remember next positions to merge. For example:\n\t// <a><b>x[]</b></a><c><d>{}y</d></c>\n\t// will become:\n\t// <a><b>xy</b>[]</a><c>{}</c>\n\tstartPos = writer.createPositionAfter( startParent );\n\tendPos = writer.createPositionBefore( endParent );\n\n\tif ( !endPos.isEqual( startPos ) ) {\n\t\t// In this case, before we merge, we need to move `endParent` to the `startPos`:\n\t\t// <a><b>x[]</b></a><c><d>{}y</d></c>\n\t\t// becomes:\n\t\t// <a><b>x</b>[]<d>y</d></a><c>{}</c>\n\t\twriter.insert( endParent, startPos );\n\t}\n\n\t// Merge two siblings:\n\t// <a>x</a>[]<b>y</b> -> <a>xy</a> (the usual case)\n\t// <a><b>x</b>[]<d>y</d></a><c></c> -> <a><b>xy</b>[]</a><c></c> (this is the \"move parent\" case shown above)\n\twriter.merge( startPos );\n\n\t// Remove empty end ancestors:\n\t// <a>fo[o</a><b><a><c>bar]</c></a></b>\n\t// becomes:\n\t// <a>fo[]</a><b><a>{}</a></b>\n\t// So we can remove <a> and <b>.\n\twhile ( endPos.parent.isEmpty ) {\n\t\tconst parentToRemove = endPos.parent;\n\n\t\tendPos = writer.createPositionBefore( parentToRemove );\n\n\t\twriter.remove( parentToRemove );\n\t}\n\n\t// Continue merging next level.\n\tmergeBranches( writer, startPos, endPos );\n}\n\nfunction shouldAutoparagraph( schema, position ) {\n\tconst isTextAllowed = schema.checkChild( position, '$text' );\n\tconst isParagraphAllowed = schema.checkChild( position, 'paragraph' );\n\n\treturn !isTextAllowed && isParagraphAllowed;\n}\n\n// Check if parents of two positions can be merged by checking if there are no limit/object\n// boundaries between those two positions.\n//\n// E.g. in <bQ><p>x[]</p></bQ><widget><caption>{}</caption></widget>\n// we'll check <p>, <bQ>, <widget> and <caption>.\n// Usually, widget and caption are marked as objects/limits in the schema, so in this case merging will be blocked.\nfunction checkCanBeMerged( leftPos, rightPos, schema ) {\n\tconst rangeToCheck = new Range( leftPos, rightPos );\n\n\tfor ( const value of rangeToCheck.getWalker() ) {\n\t\tif ( schema.isLimit( value.item ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn true;\n}\n\nfunction insertParagraph( writer, position, selection ) {\n\tconst paragraph = writer.createElement( 'paragraph' );\n\n\twriter.insert( paragraph, position );\n\n\tcollapseSelectionAt( writer, selection, writer.createPositionAt( paragraph, 0 ) );\n}\n\nfunction replaceEntireContentWithParagraph( writer, selection ) {\n\tconst limitElement = writer.model.schema.getLimitElement( selection );\n\n\twriter.remove( writer.createRangeIn( limitElement ) );\n\tinsertParagraph( writer, writer.createPositionAt( limitElement, 0 ), selection );\n}\n\n// We want to replace the entire content with a paragraph when:\n// * the entire content is selected,\n// * selection contains at least two elements,\n// * whether the paragraph is allowed in schema in the common ancestor.\nfunction shouldEntireContentBeReplacedWithParagraph( schema, selection ) {\n\tconst limitElement = schema.getLimitElement( selection );\n\n\tif ( !selection.containsEntireContent( limitElement ) ) {\n\t\treturn false;\n\t}\n\n\tconst range = selection.getFirstRange();\n\n\tif ( range.start.parent == range.end.parent ) {\n\t\treturn false;\n\t}\n\n\treturn schema.checkChild( limitElement, 'paragraph' );\n}\n\n// Helper function that sets the selection. Depending whether given `selection` is a document selection or not,\n// uses a different method to set it.\nfunction collapseSelectionAt( writer, selection, positionOrRange ) {\n\tif ( selection instanceof DocumentSelection ) {\n\t\twriter.setSelection( positionOrRange );\n\t} else {\n\t\tselection.setTo( positionOrRange );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/modifyselection\n */\n\nimport Position from '../position';\nimport TreeWalker from '../treewalker';\nimport Range from '../range';\nimport { isInsideSurrogatePair, isInsideCombinedSymbol } from '@ckeditor/ckeditor5-utils/src/unicode';\nimport DocumentSelection from '../documentselection';\n\nconst wordBoundaryCharacters = ' ,.?!:;\"-()';\n\n/**\n * Modifies the selection. Currently, the supported modifications are:\n *\n * * Extending. The selection focus is moved in the specified `options.direction` with a step specified in `options.unit`.\n * Possible values for `unit` are:\n * * `'character'` (default) - moves selection by one user-perceived character. In most cases this means moving by one\n * character in `String` sense. However, unicode also defines \"combing marks\". These are special symbols, that combines\n * with a symbol before it (\"base character\") to create one user-perceived character. For example, `q̣̇` is a normal\n * letter `q` with two \"combining marks\": upper dot (`Ux0307`) and lower dot (`Ux0323`). For most actions, i.e. extending\n * selection by one position, it is correct to include both \"base character\" and all of it's \"combining marks\". That is\n * why `'character'` value is most natural and common method of modifying selection.\n * * `'codePoint'` - moves selection by one unicode code point. In contrary to, `'character'` unit, this will insert\n * selection between \"base character\" and \"combining mark\", because \"combining marks\" have their own unicode code points.\n * However, for technical reasons, unicode code points with values above `UxFFFF` are represented in native `String` by\n * two characters, called \"surrogate pairs\". Halves of \"surrogate pairs\" have a meaning only when placed next to each other.\n * For example `𨭎` is represented in `String` by `\\uD862\\uDF4E`. Both `\\uD862` and `\\uDF4E` do not have any meaning\n * outside the pair (are rendered as ? when alone). Position between them would be incorrect. In this case, selection\n * extension will include whole \"surrogate pair\".\n * * `'word'` - moves selection by a whole word.\n *\n * **Note:** if you extend a forward selection in a backward direction you will in fact shrink it.\n *\n * **Note:** Use {@link module:engine/model/model~Model#modifySelection} instead of this function.\n * This function is only exposed to be reusable in algorithms\n * which change the {@link module:engine/model/model~Model#modifySelection}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which\n * the selection modification should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection to modify.\n * @param {Object} [options]\n * @param {'forward'|'backward'} [options.direction='forward'] The direction in which the selection should be modified.\n * @param {'character'|'codePoint'|'word'} [options.unit='character'] The unit by which selection should be modified.\n */\nexport default function modifySelection( model, selection, options = {} ) {\n\tconst schema = model.schema;\n\tconst isForward = options.direction != 'backward';\n\tconst unit = options.unit ? options.unit : 'character';\n\n\tconst focus = selection.focus;\n\n\tconst walker = new TreeWalker( {\n\t\tboundaries: getSearchRange( focus, isForward ),\n\t\tsingleCharacters: true,\n\t\tdirection: isForward ? 'forward' : 'backward'\n\t} );\n\n\tconst data = { walker, schema, isForward, unit };\n\n\tlet next;\n\n\twhile ( ( next = walker.next() ) ) {\n\t\tif ( next.done ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = tryExtendingTo( data, next.value );\n\n\t\tif ( position ) {\n\t\t\tif ( selection instanceof DocumentSelection ) {\n\t\t\t\tmodel.change( writer => {\n\t\t\t\t\twriter.setSelectionFocus( position );\n\t\t\t\t} );\n\t\t\t} else {\n\t\t\t\tselection.setFocus( position );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\t}\n}\n\n// Checks whether the selection can be extended to the the walker's next value (next position).\n// @param {{ walker, unit, isForward, schema }} data\n// @param {module:engine/view/treewalker~TreeWalkerValue} value\nfunction tryExtendingTo( data, value ) {\n\t// If found text, we can certainly put the focus in it. Let's just find a correct position\n\t// based on the unit.\n\tif ( value.type == 'text' ) {\n\t\tif ( data.unit === 'word' ) {\n\t\t\treturn getCorrectWordBreakPosition( data.walker, data.isForward );\n\t\t}\n\n\t\treturn getCorrectPosition( data.walker, data.unit, data.isForward );\n\t}\n\n\t// Entering an element.\n\tif ( value.type == ( data.isForward ? 'elementStart' : 'elementEnd' ) ) {\n\t\t// If it's an object, we can select it now.\n\t\tif ( data.schema.isObject( value.item ) ) {\n\t\t\treturn Position._createAt( value.item, data.isForward ? 'after' : 'before' );\n\t\t}\n\n\t\t// If text allowed on this position, extend to this place.\n\t\tif ( data.schema.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\treturn value.nextPosition;\n\t\t}\n\t}\n\t// Leaving an element.\n\telse {\n\t\t// If leaving a limit element, stop.\n\t\tif ( data.schema.isLimit( value.item ) ) {\n\t\t\t// NOTE: Fast-forward the walker until the end.\n\t\t\tdata.walker.skip( () => true );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// If text allowed on this position, extend to this place.\n\t\tif ( data.schema.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\treturn value.nextPosition;\n\t\t}\n\t}\n}\n\n// Finds a correct position by walking in a text node and checking whether selection can be extended to given position\n// or should be extended further.\n//\n// @param {module:engine/model/treewalker~TreeWalker} walker\n// @param {String} unit The unit by which selection should be modified.\nfunction getCorrectPosition( walker, unit ) {\n\tconst textNode = walker.position.textNode;\n\n\tif ( textNode ) {\n\t\tconst data = textNode.data;\n\t\tlet offset = walker.position.offset - textNode.startOffset;\n\n\t\twhile ( isInsideSurrogatePair( data, offset ) || ( unit == 'character' && isInsideCombinedSymbol( data, offset ) ) ) {\n\t\t\twalker.next();\n\n\t\t\toffset = walker.position.offset - textNode.startOffset;\n\t\t}\n\t}\n\n\treturn walker.position;\n}\n\n// Finds a correct position of a word break by walking in a text node and checking whether selection can be extended to given position\n// or should be extended further.\n//\n// @param {module:engine/model/treewalker~TreeWalker} walker\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction getCorrectWordBreakPosition( walker, isForward ) {\n\tlet textNode = walker.position.textNode;\n\n\tif ( textNode ) {\n\t\tlet offset = walker.position.offset - textNode.startOffset;\n\n\t\twhile ( !isAtWordBoundary( textNode.data, offset, isForward ) && !isAtNodeBoundary( textNode, offset, isForward ) ) {\n\t\t\twalker.next();\n\n\t\t\t// Check of adjacent text nodes with different attributes (like BOLD).\n\t\t\t// Example : 'foofoo []bar<$text bold=\"true\">bar</$text> bazbaz'\n\t\t\t// should expand to : 'foofoo [bar<$text bold=\"true\">bar</$text>] bazbaz'.\n\t\t\tconst nextNode = isForward ? walker.position.nodeAfter : walker.position.nodeBefore;\n\n\t\t\t// Scan only text nodes. Ignore inline elements (like `<softBreak>`).\n\t\t\tif ( nextNode && nextNode.is( 'text' ) ) {\n\t\t\t\t// Check boundary char of an adjacent text node.\n\t\t\t\tconst boundaryChar = nextNode.data.charAt( isForward ? 0 : nextNode.data.length - 1 );\n\n\t\t\t\t// Go to the next node if the character at the boundary of that node belongs to the same word.\n\t\t\t\tif ( !wordBoundaryCharacters.includes( boundaryChar ) ) {\n\t\t\t\t\t// If adjacent text node belongs to the same word go to it & reset values.\n\t\t\t\t\twalker.next();\n\n\t\t\t\t\ttextNode = walker.position.textNode;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\toffset = walker.position.offset - textNode.startOffset;\n\t\t}\n\t}\n\n\treturn walker.position;\n}\n\nfunction getSearchRange( start, isForward ) {\n\tconst root = start.root;\n\tconst searchEnd = Position._createAt( root, isForward ? 'end' : 0 );\n\n\tif ( isForward ) {\n\t\treturn new Range( start, searchEnd );\n\t} else {\n\t\treturn new Range( searchEnd, start );\n\t}\n}\n\n// Checks if selection is on word boundary.\n//\n// @param {String} data The text node value to investigate.\n// @param {Number} offset Position offset.\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction isAtWordBoundary( data, offset, isForward ) {\n\t// The offset to check depends on direction.\n\tconst offsetToCheck = offset + ( isForward ? 0 : -1 );\n\n\treturn wordBoundaryCharacters.includes( data.charAt( offsetToCheck ) );\n}\n\n// Checks if selection is on node boundary.\n//\n// @param {module:engine/model/text~Text} textNode The text node to investigate.\n// @param {Number} offset Position offset.\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction isAtNodeBoundary( textNode, offset, isForward ) {\n\treturn offset === ( isForward ? textNode.endOffset : 0 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/getselectedcontent\n */\n\n/**\n * Gets a clone of the selected content.\n *\n * For example, for the following selection:\n *\n * ```html\n * <p>x</p><quote><p>y</p><h>fir[st</h></quote><p>se]cond</p><p>z</p>\n * ```\n *\n * It will return a document fragment with such a content:\n *\n * ```html\n * <quote><h>st</h></quote><p>se</p>\n * ```\n *\n * @param {module:engine/model/model~Model} model The model in context of which\n * the selection modification should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection of which content will be returned.\n * @returns {module:engine/model/documentfragment~DocumentFragment}\n */\nexport default function getSelectedContent( model, selection ) {\n\treturn model.change( writer => {\n\t\tconst frag = writer.createDocumentFragment();\n\t\tconst range = selection.getFirstRange();\n\n\t\tif ( !range || range.isCollapsed ) {\n\t\t\treturn frag;\n\t\t}\n\n\t\tconst root = range.start.root;\n\t\tconst commonPath = range.start.getCommonPath( range.end );\n\t\tconst commonParent = root.getNodeByPath( commonPath );\n\n\t\t// ## 1st step\n\t\t//\n\t\t// First, we'll clone a fragment represented by a minimal flat range\n\t\t// containing the original range to be cloned.\n\t\t// E.g. let's consider such a range:\n\t\t//\n\t\t// <p>x</p><quote><p>y</p><h>fir[st</h></quote><p>se]cond</p><p>z</p>\n\t\t//\n\t\t// A minimal flat range containing this one is:\n\t\t//\n\t\t// <p>x</p>[<quote><p>y</p><h>first</h></quote><p>second</p>]<p>z</p>\n\t\t//\n\t\t// We can easily clone this structure, preserving e.g. the <quote> element.\n\t\tlet flatSubtreeRange;\n\n\t\tif ( range.start.parent == range.end.parent ) {\n\t\t\t// The original range is flat, so take it.\n\t\t\tflatSubtreeRange = range;\n\t\t} else {\n\t\t\tflatSubtreeRange = writer.createRange(\n\t\t\t\twriter.createPositionAt( commonParent, range.start.path[ commonPath.length ] ),\n\t\t\t\twriter.createPositionAt( commonParent, range.end.path[ commonPath.length ] + 1 )\n\t\t\t);\n\t\t}\n\n\t\tconst howMany = flatSubtreeRange.end.offset - flatSubtreeRange.start.offset;\n\n\t\t// Clone the whole contents.\n\t\tfor ( const item of flatSubtreeRange.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\t\twriter.appendText( item.data, item.getAttributes(), frag );\n\t\t\t} else {\n\t\t\t\twriter.append( item._clone( true ), frag );\n\t\t\t}\n\t\t}\n\n\t\t// ## 2nd step\n\t\t//\n\t\t// If the original range wasn't flat, then we need to remove the excess nodes from the both ends of the cloned fragment.\n\t\t//\n\t\t// For example, for the range shown in the 1st step comment, we need to remove these pieces:\n\t\t//\n\t\t// <quote>[<p>y</p>]<h>[fir]st</h></quote><p>se[cond]</p>\n\t\t//\n\t\t// So this will be the final copied content:\n\t\t//\n\t\t// <quote><h>st</h></quote><p>se</p>\n\t\t//\n\t\t// In order to do that, we remove content from these two ranges:\n\t\t//\n\t\t// [<quote><p>y</p><h>fir]st</h></quote><p>se[cond</p>]\n\t\tif ( flatSubtreeRange != range ) {\n\t\t\t// Find the position of the original range in the cloned fragment.\n\t\t\tconst newRange = range._getTransformedByMove( flatSubtreeRange.start, writer.createPositionAt( frag, 0 ), howMany )[ 0 ];\n\n\t\t\tconst leftExcessRange = writer.createRange( writer.createPositionAt( frag, 0 ), newRange.start );\n\t\t\tconst rightExcessRange = writer.createRange( newRange.end, writer.createPositionAt( frag, 'end' ) );\n\n\t\t\tremoveRangeContent( rightExcessRange, writer );\n\t\t\tremoveRangeContent( leftExcessRange, writer );\n\t\t}\n\n\t\treturn frag;\n\t} );\n}\n\n// After https://github.com/ckeditor/ckeditor5-engine/issues/690 is fixed,\n// this function will, most likely, be able to rewritten using getMinimalFlatRanges().\nfunction removeRangeContent( range, writer ) {\n\tconst parentsToCheck = [];\n\n\tArray.from( range.getItems( { direction: 'backward' } ) )\n\t\t// We should better store ranges because text proxies will lose integrity\n\t\t// with the text nodes when we'll start removing content.\n\t\t.map( item => writer.createRangeOn( item ) )\n\t\t// Filter only these items which are fully contained in the passed range.\n\t\t//\n\t\t// E.g. for the following range: [<quote><p>y</p><h>fir]st</h>\n\t\t// the walker will return the entire <h> element, when only the \"fir\" item inside it is fully contained.\n\t\t.filter( itemRange => {\n\t\t\t// We should be able to use Range.containsRange, but https://github.com/ckeditor/ckeditor5-engine/issues/691.\n\t\t\tconst contained =\n\t\t\t\t( itemRange.start.isAfter( range.start ) || itemRange.start.isEqual( range.start ) ) &&\n\t\t\t\t( itemRange.end.isBefore( range.end ) || itemRange.end.isEqual( range.end ) );\n\n\t\t\treturn contained;\n\t\t} )\n\t\t.forEach( itemRange => {\n\t\t\tparentsToCheck.push( itemRange.start.parent );\n\n\t\t\twriter.remove( itemRange );\n\t\t} );\n\n\t// Remove ancestors of the removed items if they turned to be empty now\n\t// (their whole content was contained in the range).\n\tparentsToCheck.forEach( parentToCheck => {\n\t\tlet parent = parentToCheck;\n\n\t\twhile ( parent.parent && parent.isEmpty ) {\n\t\t\tconst removeRange = writer.createRangeOn( parent );\n\n\t\t\tparent = parent.parent;\n\n\t\t\twriter.remove( removeRange );\n\t\t}\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/selection-post-fixer\n */\n\nimport Range from '../range';\nimport Position from '../position';\n\n/**\n * Injects selection post-fixer to the model.\n *\n * The role of the selection post-fixer is to ensure that the selection is in a correct place\n * after a {@link module:engine/model/model~Model#change `change()`} block was executed.\n *\n * The correct position means that:\n *\n * * All collapsed selection ranges are in a place where the {@link module:engine/model/schema~Schema}\n * allows a `$text`.\n * * None of the selection's non-collapsed ranges crosses a {@link module:engine/model/schema~Schema#isLimit limit element}\n * boundary (a range must be rooted within one limit element).\n * * Only {@link module:engine/model/schema~Schema#isObject object elements} can be selected from the outside\n * (e.g. `[<paragraph>foo</paragraph>]` is invalid). This rule applies independently to both selection ends, so this\n * selection is correct: `<paragraph>f[oo</paragraph><image></image>]`.\n *\n * If the position is not correct, the post-fixer will automatically correct it.\n *\n * ## Fixing a non-collapsed selection\n *\n * See as an example a selection that starts in a P1 element and ends inside the text of a TD element\n * (`[` and `]` are range boundaries and `(l)` denotes an element defined as `isLimit=true`):\n *\n *\t\troot\n *\t\t |- element P1\n *\t\t | |- \"foo\" root\n *\t\t |- element TABLE (l) P1 TABLE P2\n *\t\t | |- element TR (l) f o[o TR TR b a r\n *\t\t | | |- element TD (l) TD TD\n *\t\t | | |- \"aaa\" a]a a b b b\n *\t\t | |- element TR (l)\n *\t\t | | |- element TD (l) ||\n *\t\t | | |- \"bbb\" ||\n *\t\t |- element P2 VV\n *\t\t | |- \"bar\"\n *\t\t root\n *\t\t P1 TABLE] P2\n *\t\t f o[o TR TR b a r\n *\t\t TD TD\n *\t\t a a a b b b\n *\n * In the example above, the TABLE, TR and TD are defined as `isLimit=true` in the schema. The range which is not contained within\n * a single limit element must be expanded to select the outermost limit element. The range end is inside the text node of the TD element.\n * As the TD element is a child of the TR and TABLE elements, where both are defined as `isLimit=true` in the schema, the range must be\n * expanded to select the whole TABLE element.\n *\n * **Note** If the selection contains multiple ranges, the method returns a minimal set of ranges that are not intersecting after expanding\n * them to select `isLimit=true` elements.\n *\n * @param {module:engine/model/model~Model} model\n */\nexport function injectSelectionPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => selectionPostFixer( writer, model ) );\n}\n\n// The selection post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction selectionPostFixer( writer, model ) {\n\tconst selection = model.document.selection;\n\tconst schema = model.schema;\n\n\tconst ranges = [];\n\n\tlet wasFixed = false;\n\n\tfor ( const modelRange of selection.getRanges() ) {\n\t\t// Go through all ranges in selection and try fixing each of them.\n\t\t// Those ranges might overlap but will be corrected later.\n\t\tconst correctedRange = tryFixingRange( modelRange, schema );\n\n\t\tif ( correctedRange ) {\n\t\t\tranges.push( correctedRange );\n\t\t\twasFixed = true;\n\t\t} else {\n\t\t\tranges.push( modelRange );\n\t\t}\n\t}\n\n\t// If any of ranges were corrected update the selection.\n\tif ( wasFixed ) {\n\t\t// The above algorithm might create ranges that intersects each other when selection contains more then one range.\n\t\t// This is case happens mostly on Firefox which creates multiple ranges for selected table.\n\t\tlet fixedRanges = ranges;\n\n\t\t// Fixing selection with many ranges usually breaks the selection in Firefox. As only Firefox supports multiple selection ranges\n\t\t// we simply create one continuous range from fixed selection ranges (even if they are not adjacent).\n\t\tif ( ranges.length > 1 ) {\n\t\t\tconst selectionStart = ranges[ 0 ].start;\n\t\t\tconst selectionEnd = ranges[ ranges.length - 1 ].end;\n\n\t\t\tfixedRanges = [ new Range( selectionStart, selectionEnd ) ];\n\t\t}\n\n\t\twriter.setSelection( fixedRanges, { backward: selection.isBackward } );\n\t}\n}\n\n// Tries fixing a range if it's incorrect.\n//\n// @param {module:engine/model/range~Range} range\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingRange( range, schema ) {\n\tif ( range.isCollapsed ) {\n\t\treturn tryFixingCollapsedRange( range, schema );\n\t}\n\n\treturn tryFixingNonCollapsedRage( range, schema );\n}\n\n// Tries to fix collapsed ranges.\n//\n// * Fixes situation when a range is in a place where $text is not allowed\n//\n// @param {module:engine/model/range~Range} range Collapsed range to fix.\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingCollapsedRange( range, schema ) {\n\tconst originalPosition = range.start;\n\n\tconst nearestSelectionRange = schema.getNearestSelectionRange( originalPosition );\n\n\t// This might be null ie when editor data is empty.\n\t// In such cases there is no need to fix the selection range.\n\tif ( !nearestSelectionRange ) {\n\t\treturn null;\n\t}\n\n\tconst fixedPosition = nearestSelectionRange.start;\n\n\t// Fixed position is the same as original - no need to return corrected range.\n\tif ( originalPosition.isEqual( fixedPosition ) ) {\n\t\treturn null;\n\t}\n\n\t// Check single node selection (happens in tables).\n\tif ( fixedPosition.nodeAfter && schema.isLimit( fixedPosition.nodeAfter ) ) {\n\t\treturn new Range( fixedPosition, Position._createAfter( fixedPosition.nodeAfter ) );\n\t}\n\n\treturn new Range( fixedPosition );\n}\n\n// Tries to fix an expanded range.\n//\n// @param {module:engine/model/range~Range} range Expanded range to fix.\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingNonCollapsedRage( range, schema ) {\n\tconst start = range.start;\n\tconst end = range.end;\n\n\tconst isTextAllowedOnStart = schema.checkChild( start, '$text' );\n\tconst isTextAllowedOnEnd = schema.checkChild( end, '$text' );\n\n\tconst startLimitElement = schema.getLimitElement( start );\n\tconst endLimitElement = schema.getLimitElement( end );\n\n\t// Ranges which both end are inside the same limit element (or root) might needs only minor fix.\n\tif ( startLimitElement === endLimitElement ) {\n\t\t// Range is valid when both position allows to place a text:\n\t\t// - <block>f[oobarba]z</block>\n\t\t// This would be \"fixed\" by a next check but as it will be the same it's better to return null so the selection stays the same.\n\t\tif ( isTextAllowedOnStart && isTextAllowedOnEnd ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Range that is on non-limit element (or is partially) must be fixed so it is placed inside the block around $text:\n\t\t// - [<block>foo</block>] -> <block>[foo]</block>\n\t\t// - [<block>foo]</block> -> <block>[foo]</block>\n\t\t// - <block>f[oo</block>] -> <block>f[oo]</block>\n\t\t// - [<block>foo</block><object></object>] -> <block>[foo</block><object></object>]\n\t\tif ( checkSelectionOnNonLimitElements( start, end, schema ) ) {\n\t\t\tconst isStartObject = start.nodeAfter && schema.isObject( start.nodeAfter );\n\t\t\tconst fixedStart = isStartObject ? null : schema.getNearestSelectionRange( start, 'forward' );\n\n\t\t\tconst isEndObject = end.nodeBefore && schema.isObject( end.nodeBefore );\n\t\t\tconst fixedEnd = isEndObject ? null : schema.getNearestSelectionRange( end, 'backward' );\n\n\t\t\t// The schema.getNearestSelectionRange might return null - if that happens use original position.\n\t\t\tconst rangeStart = fixedStart ? fixedStart.start : start;\n\t\t\tconst rangeEnd = fixedEnd ? fixedEnd.start : end;\n\n\t\t\treturn new Range( rangeStart, rangeEnd );\n\t\t}\n\t}\n\n\tconst isStartInLimit = startLimitElement && !startLimitElement.is( 'rootElement' );\n\tconst isEndInLimit = endLimitElement && !endLimitElement.is( 'rootElement' );\n\n\t// At this point we eliminated valid positions on text nodes so if one of range positions is placed inside a limit element\n\t// then the range crossed limit element boundaries and needs to be fixed.\n\tif ( isStartInLimit || isEndInLimit ) {\n\t\tconst bothInSameParent = ( start.nodeAfter && end.nodeBefore ) && start.nodeAfter.parent === end.nodeBefore.parent;\n\n\t\tconst expandStart = isStartInLimit && ( !bothInSameParent || !isInObject( start.nodeAfter, schema ) );\n\t\tconst expandEnd = isEndInLimit && ( !bothInSameParent || !isInObject( end.nodeBefore, schema ) );\n\n\t\t// Although we've already found limit element on start/end positions we must find the outer-most limit element.\n\t\t// as limit elements might be nested directly inside (ie table > tableRow > tableCell).\n\t\tlet fixedStart = start;\n\t\tlet fixedEnd = end;\n\n\t\tif ( expandStart ) {\n\t\t\tfixedStart = Position._createBefore( findOutermostLimitAncestor( startLimitElement, schema ) );\n\t\t}\n\n\t\tif ( expandEnd ) {\n\t\t\tfixedEnd = Position._createAfter( findOutermostLimitAncestor( endLimitElement, schema ) );\n\t\t}\n\n\t\treturn new Range( fixedStart, fixedEnd );\n\t}\n\n\t// Range was not fixed at this point so it is valid - ie it was placed around limit element already.\n\treturn null;\n}\n\n// Finds the outer-most ancestor.\n//\n// @param {module:engine/model/node~Node} startingNode\n// @param {module:engine/model/schema~Schema} schema\n// @param {String} expandToDirection Direction of expansion - either 'start' or 'end' of the range.\n// @returns {module:engine/model/node~Node}\nfunction findOutermostLimitAncestor( startingNode, schema ) {\n\tlet isLimitNode = startingNode;\n\tlet parent = isLimitNode;\n\n\t// Find outer most isLimit block as such blocks might be nested (ie. in tables).\n\twhile ( schema.isLimit( parent ) && parent.parent ) {\n\t\tisLimitNode = parent;\n\t\tparent = parent.parent;\n\t}\n\n\treturn isLimitNode;\n}\n\n// Checks whether any of range boundaries is placed around non-limit elements.\n//\n// @param {module:engine/model/position~Position} start\n// @param {module:engine/model/position~Position} end\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction checkSelectionOnNonLimitElements( start, end, schema ) {\n\tconst startIsOnBlock = ( start.nodeAfter && !schema.isLimit( start.nodeAfter ) ) || schema.checkChild( start, '$text' );\n\tconst endIsOnBlock = ( end.nodeBefore && !schema.isLimit( end.nodeBefore ) ) || schema.checkChild( end, '$text' );\n\n\t// We should fix such selection when one of those nodes needs fixing.\n\treturn startIsOnBlock || endIsOnBlock;\n}\n\n// Checks if node exists and if it's an object.\n//\n// @param {module:engine/model/node~Node} node\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction isInObject( node, schema ) {\n\treturn node && schema.isObject( node );\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/model\n */\n\nimport Batch from './batch';\nimport Writer from './writer';\nimport Schema from './schema';\nimport Document from './document';\nimport MarkerCollection from './markercollection';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ModelElement from './element';\nimport ModelRange from './range';\nimport ModelPosition from './position';\nimport ModelSelection from './selection';\n\nimport insertContent from './utils/insertcontent';\nimport deleteContent from './utils/deletecontent';\nimport modifySelection from './utils/modifyselection';\nimport getSelectedContent from './utils/getselectedcontent';\nimport { injectSelectionPostFixer } from './utils/selection-post-fixer';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const { dumpTrees } = require( '../dev-utils/utils' );\n// @if CK_DEBUG_ENGINE // const { OperationReplayer } = require( '../dev-utils/operationreplayer' ).default;\n\n/**\n * Editor's data model. Read about the model in the\n * {@glink framework/guides/architecture/editing-engine engine architecture guide}.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Model {\n\tconstructor() {\n\t\t/**\n\t\t * Model's marker collection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis.markers = new MarkerCollection();\n\n\t\t/**\n\t\t * Model's document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/document~Document}\n\t\t */\n\t\tthis.document = new Document( this );\n\n\t\t/**\n\t\t * Model's schema.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/schema~Schema}\n\t\t */\n\t\tthis.schema = new Schema();\n\n\t\t/**\n\t\t * All callbacks added by {@link module:engine/model/model~Model#change} or\n\t\t * {@link module:engine/model/model~Model#enqueueChange} methods waiting to be executed.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Function>}\n\t\t */\n\t\tthis._pendingChanges = [];\n\n\t\t/**\n\t\t * The last created and currently used writer instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/writer~Writer}\n\t\t */\n\t\tthis._currentWriter = null;\n\n\t\t[ 'insertContent', 'deleteContent', 'modifySelection', 'getSelectedContent', 'applyOperation' ]\n\t\t\t.forEach( methodName => this.decorate( methodName ) );\n\n\t\t// Adding operation validation with `highest` priority, so it is called before any other feature would like\n\t\t// to do anything with the operation. If the operation has incorrect parameters it should throw on the earliest occasion.\n\t\tthis.on( 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\toperation._validate();\n\t\t}, { priority: 'highest' } );\n\n\t\t// Register some default abstract entities.\n\t\tthis.schema.register( '$root', {\n\t\t\tisLimit: true\n\t\t} );\n\t\tthis.schema.register( '$block', {\n\t\t\tallowIn: '$root',\n\t\t\tisBlock: true\n\t\t} );\n\t\tthis.schema.register( '$text', {\n\t\t\tallowIn: '$block',\n\t\t\tisInline: true\n\t\t} );\n\t\tthis.schema.register( '$clipboardHolder', {\n\t\t\tallowContentOf: '$root',\n\t\t\tisLimit: true\n\t\t} );\n\t\tthis.schema.extend( '$text', { allowIn: '$clipboardHolder' } );\n\n\t\t// An element needed by the `upcastElementToMarker` converter.\n\t\t// This element temporarily represents a marker boundary during the conversion process and is removed\n\t\t// at the end of the conversion. `UpcastDispatcher` or at least `Conversion` class looks like a\n\t\t// better place for this registration but both know nothing about `Schema`.\n\t\tthis.schema.register( '$marker' );\n\t\tthis.schema.addChildCheck( ( context, childDefinition ) => {\n\t\t\tif ( childDefinition.name === '$marker' ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t\tinjectSelectionPostFixer( this );\n\n\t\t// @if CK_DEBUG_ENGINE // this.on( 'applyOperation', () => {\n\t\t// @if CK_DEBUG_ENGINE // \tdumpTrees( this.document, this.document.version );\n\t\t// @if CK_DEBUG_ENGINE // }, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * The `change()` method is the primary way of changing the model. You should use it to modify all document nodes\n\t * (including detached nodes – i.e. nodes not added to the {@link module:engine/model/model~Model#document model document}),\n\t * the {@link module:engine/model/document~Document#selection document's selection}, and\n\t * {@link module:engine/model/model~Model#markers model markers}.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t} );\n\t *\n\t * All changes inside the change block use the same {@link module:engine/model/batch~Batch} so they are combined\n\t * into a single undo step.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' ); // foo.\n\t *\n\t *\t\t\tmodel.change( writer => {\n\t *\t\t\t\twriter.insertText( 'bar', paragraph, 'end' ); // foobar.\n\t *\t\t\t} );\n\t *\n\t * \t\t\twriter.insertText( 'bom', paragraph, 'end' ); // foobarbom.\n\t *\t\t} );\n\t *\n\t * The callback of the `change()` block is executed synchronously.\n\t *\n\t * You can also return a value from the change block.\n\t *\n\t *\t\tconst img = model.change( writer => {\n\t *\t\t\treturn writer.createElement( 'img' );\n\t *\t\t} );\n\t *\n\t * @see #enqueueChange\n\t * @param {Function} callback Callback function which may modify the model.\n\t * @returns {*} Value returned by the callback.\n\t */\n\tchange( callback ) {\n\t\ttry {\n\t\t\tif ( this._pendingChanges.length === 0 ) {\n\t\t\t\t// If this is the outermost block, create a new batch and start `_runPendingChanges` execution flow.\n\t\t\t\tthis._pendingChanges.push( { batch: new Batch(), callback } );\n\n\t\t\t\treturn this._runPendingChanges()[ 0 ];\n\t\t\t} else {\n\t\t\t\t// If this is not the outermost block, just execute the callback.\n\t\t\t\treturn callback( this._currentWriter );\n\t\t\t}\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * The `enqueueChange()` method performs similar task as the {@link #change `change()` method}, with two major differences.\n\t *\n\t * First, the callback of `enqueueChange()` is executed when all other enqueued changes are done. It might be executed\n\t * immediately if it is not nested in any other change block, but if it is nested in another (enqueue)change block,\n\t * it will be delayed and executed after the outermost block.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconsole.log( 1 );\n\t *\n\t *\t\t\tmodel.enqueueChange( writer => {\n\t *\t\t\t\tconsole.log( 2 );\n\t *\t\t\t} );\n\t *\n\t * \t\t\tconsole.log( 3 );\n\t *\t\t} ); // Will log: 1, 3, 2.\n\t *\n\t * Second, it lets you define the {@link module:engine/model/batch~Batch} into which you want to add your changes.\n\t * By default, a new batch is created. In the sample above, `change` and `enqueueChange` blocks use a different\n\t * batch (and different {@link module:engine/model/writer~Writer} since each of them operates on the separate batch).\n\t *\n\t * When using the `enqueueChange()` block you can also add some changes to the batch you used before.\n\t *\n\t *\t\tmodel.enqueueChange( batch, writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t} );\n\t *\n\t * The batch instance can be obtained from {@link module:engine/model/writer~Writer#batch the writer}.\n\t *\n\t * @param {module:engine/model/batch~Batch|'transparent'|'default'} batchOrType Batch or batch type should be used in the callback.\n\t * If not defined, a new batch will be created.\n\t * @param {Function} callback Callback function which may modify the model.\n\t */\n\tenqueueChange( batchOrType, callback ) {\n\t\ttry {\n\t\t\tif ( typeof batchOrType === 'string' ) {\n\t\t\t\tbatchOrType = new Batch( batchOrType );\n\t\t\t} else if ( typeof batchOrType == 'function' ) {\n\t\t\t\tcallback = batchOrType;\n\t\t\t\tbatchOrType = new Batch();\n\t\t\t}\n\n\t\t\tthis._pendingChanges.push( { batch: batchOrType, callback } );\n\n\t\t\tif ( this._pendingChanges.length == 1 ) {\n\t\t\t\tthis._runPendingChanges();\n\t\t\t}\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * {@link module:utils/observablemixin~ObservableMixin#decorate Decorated} function for applying\n\t * {@link module:engine/model/operation/operation~Operation operations} to the model.\n\t *\n\t * This is a low-level way of changing the model. It is exposed for very specific use cases (like the undo feature).\n\t * Normally, to modify the model, you will want to use {@link module:engine/model/writer~Writer `Writer`}.\n\t * See also {@glink framework/guides/architecture/editing-engine#changing-the-model Changing the model} section\n\t * of the {@glink framework/guides/architecture/editing-engine Editing architecture} guide.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation The operation to apply.\n\t */\n\tapplyOperation( operation ) {\n\t\t// @if CK_DEBUG_ENGINE // console.log( 'Applying ' + operation );\n\n\t\t// @if CK_DEBUG_ENGINE // if ( !this._operationLogs ) {\n\t\t// @if CK_DEBUG_ENGINE //\tthis._operationLogs = [];\n\t\t// @if CK_DEBUG_ENGINE // }\n\n\t\t// @if CK_DEBUG_ENGINE // this._operationLogs.push( JSON.stringify( operation ) );\n\n\t\t// @if CK_DEBUG_ENGINE //if ( !this._appliedOperations ) {\n\t\t// @if CK_DEBUG_ENGINE //\tthis._appliedOperations = [];\n\t\t// @if CK_DEBUG_ENGINE //}\n\n\t\t// @if CK_DEBUG_ENGINE //this._appliedOperations.push( operation );\n\n\t\toperation._execute();\n\t}\n\n\t// @if CK_DEBUG_ENGINE // getAppliedOperation() {\n\t// @if CK_DEBUG_ENGINE //\tif ( !this._appliedOperations ) {\n\t// @if CK_DEBUG_ENGINE //\t\treturn '';\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\treturn this._appliedOperations.map( JSON.stringify ).join( '-------' );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // createReplayer( stringifiedOperations ) {\n\t// @if CK_DEBUG_ENGINE //\treturn new OperationReplayer( this, '-------', stringifiedOperations );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t/**\n\t * Inserts content at the position in the editor specified by the selection, as one would expect the paste\n\t * functionality to work.\n\t *\n\t * This is a high-level method. It takes the {@link #schema schema} into consideration when inserting\n\t * the content, clears the given selection's content before inserting nodes and moves the selection\n\t * to its target position at the end of the process.\n\t * It can split elements, merge them, wrap bare text nodes with paragraphs, etc. — just like the\n\t * pasting feature should do.\n\t *\n\t * For lower-level methods see {@link module:engine/model/writer~Writer `Writer`}.\n\t *\n\t * This method, unlike {@link module:engine/model/writer~Writer `Writer`}'s methods, does not have to be used\n\t * inside a {@link #change `change()` block}.\n\t *\n\t * # Conversion and schema\n\t *\n\t * Inserting elements and text nodes into the model is not enough to make CKEditor 5 render that content\n\t * to the user. CKEditor 5 implements a model-view-controller architecture and what `model.insertContent()` does\n\t * is only adding nodes to the model. Additionally, you need to define\n\t * {@glink framework/guides/architecture/editing-engine#conversion converters} between the model and view\n\t * and define those nodes in the {@glink framework/guides/architecture/editing-engine#schema schema}.\n\t *\n\t * So, while this method may seem similar to CKEditor 4 `editor.insertHtml()` (in fact, both methods\n\t * are used for paste-like content insertion), the CKEditor 5 method cannot be use to insert arbitrary HTML\n\t * unless converters are defined for all elements and attributes in that HTML.\n\t *\n\t * # Examples\n\t *\n\t * Using `insertContent()` with a manually created model structure:\n\t *\n\t *\t\t// Let's create a document fragment containing such content as:\n\t *\t\t//\n\t *\t\t// <paragraph>foo</paragraph>\n\t *\t\t// <blockQuote>\n\t *\t\t// <paragraph>bar</paragraph>\n\t *\t\t// </blockQuote>\n\t *\t\tconst docFrag = editor.model.change( writer => {\n\t *\t\t\tconst p1 = writer.createElement( 'paragraph' );\n\t *\t\t\tconst p2 = writer.createElement( 'paragraph' );\n\t *\t\t\tconst blockQuote = writer.createElement( 'blockQuote' );\n\t *\t\t\tconst docFrag = writer.createDocumentFragment();\n\t *\n\t *\t\t\twriter.append( p1, docFrag );\n\t *\t\t\twriter.append( blockQuote, docFrag );\n\t *\t\t\twriter.append( p2, blockQuote );\n\t *\t\t\twriter.insertText( 'foo', p1 );\n\t *\t\t\twriter.insertText( 'bar', p2 );\n\t *\n\t *\t\t\treturn docFrag;\n\t *\t\t} );\n\t *\n\t *\t\t// insertContent() does not have to be used in a change() block. It can, though,\n\t *\t\t// so this code could be moved to the callback defined above.\n\t *\t\teditor.model.insertContent( docFrag );\n\t *\n\t * Using `insertContent()` with an HTML string converted to a model document fragment (similar to the pasting mechanism):\n\t *\n\t *\t\t// You can create your own HtmlDataProcessor instance or use editor.data.processor\n\t *\t\t// if you have not overridden the default one (which is the HtmlDataProcessor instance).\n\t *\t\tconst htmlDP = new HtmlDataProcessor();\n\t *\n\t *\t\t// Convert an HTML string to a view document fragment:\n\t *\t\tconst viewFragment = htmlDP.toView( htmlString );\n\t *\n\t *\t\t// Convert the view document fragment to a model document fragment\n\t *\t\t// in the context of $root. This conversion takes the schema into\n\t *\t\t// account so if, for example, the view document fragment contained a bare text node,\n\t *\t\t// this text node cannot be a child of $root, so it will be automatically\n\t *\t\t// wrapped with a <paragraph>. You can define the context yourself (in the second parameter),\n\t *\t\t// and e.g. convert the content like it would happen in a <paragraph>.\n\t *\t\t// Note: The clipboard feature uses a custom context called $clipboardHolder\n\t *\t\t// which has a loosened schema.\n\t *\t\tconst modelFragment = editor.data.toModel( viewFragment );\n\t *\n\t *\t\teditor.model.insertContent( modelFragment );\n\t *\n\t * By default this method will use the document selection but it can also be used with a position, range or selection instance.\n\t *\n\t *\t\t// Insert text at the current document selection position.\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ) );\n\t *\t\t} );\n\t *\n\t *\t\t// Insert text at a given position - the document selection will not be modified.\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), doc.getRoot(), 2 );\n\t *\n\t *\t\t\t// Which is a shorthand for:\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), writer.createPositionAt( doc.getRoot(), 2 ) );\n\t *\t\t} );\n\t *\n\t * If an instance of {@link module:engine/model/selection~Selection} is passed as `selectable`\n\t * it will be moved to the target position (where the document selection should be moved after the insertion).\n\t *\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\t// Insert text replacing the given selection instance.\n\t *\t\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), selection );\n\t *\n\t *\t\t\t// insertContent() modifies the passed selection instance so it can be used to set the document selection.\n\t *\t\t\t// Note: This is not necessary when you passed the document selection to insertContent().\n\t *\t\t\twriter.setSelection( selection );\n\t *\t\t} );\n\t *\n\t * @fires insertContent\n\t * @param {module:engine/model/documentfragment~DocumentFragment|module:engine/model/item~Item} content The content to insert.\n\t * @param {module:engine/model/selection~Selectable} [selectable=model.document.selection]\n\t * The selection into which the content should be inserted. If not provided the current model document selection will be used.\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] To be used when a model item was passed as `selectable`.\n\t * This param defines a position in relation to that item.\n\t * @returns {module:engine/model/range~Range} Range which contains all the performed changes. This is a range that, if removed,\n\t * would return the model to the state before the insertion. If no changes were preformed by `insertContent`, returns a range collapsed\n\t * at the insertion position.\n\t */\n\tinsertContent( content, selectable, placeOrOffset ) {\n\t\treturn insertContent( this, content, selectable, placeOrOffset );\n\t}\n\n\t/**\n\t * Deletes content of the selection and merge siblings. The resulting selection is always collapsed.\n\t *\n\t * **Note:** For the sake of predictability, the resulting selection should always be collapsed.\n\t * In cases where a feature wants to modify deleting behavior so selection isn't collapsed\n\t * (e.g. a table feature may want to keep row selection after pressing <kbd>Backspace</kbd>),\n\t * then that behavior should be implemented in the view's listener. At the same time, the table feature\n\t * will need to modify this method's behavior too, e.g. to \"delete contents and then collapse\n\t * the selection inside the last selected cell\" or \"delete the row and collapse selection somewhere near\".\n\t * That needs to be done in order to ensure that other features which use `deleteContent()` will work well with tables.\n\t *\n\t * @fires deleteContent\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * Selection of which the content should be deleted.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.leaveUnmerged=false] Whether to merge elements after removing the content of the selection.\n\t *\n\t * For example `<heading1>x[x</heading1><paragraph>y]y</paragraph>` will become:\n\t *\n\t * * `<heading1>x^y</heading1>` with the option disabled (`leaveUnmerged == false`)\n\t * * `<heading1>x^</heading1><paragraph>y</paragraph>` with enabled (`leaveUnmerged == true`).\n\t *\n\t * Note: {@link module:engine/model/schema~Schema#isObject object} and {@link module:engine/model/schema~Schema#isLimit limit}\n\t * elements will not be merged.\n\t *\n\t * @param {Boolean} [options.doNotResetEntireContent=false] Whether to skip replacing the entire content with a\n\t * paragraph when the entire content was selected.\n\t *\n\t * For example `<heading1>[x</heading1><paragraph>y]</paragraph>` will become:\n\t *\n\t * * `<paragraph>^</paragraph>` with the option disabled (`doNotResetEntireContent == false`)\n\t * * `<heading1>^</heading1>` with enabled (`doNotResetEntireContent == true`)\n\t *\n\t * @param {Boolean} [options.doNotAutoparagraph=false] Whether to create a paragraph if after content deletion selection is moved\n\t * to a place where text cannot be inserted.\n\t *\n\t * For example `<paragraph>x</paragraph>[<image src=\"foo.jpg\"></image>]` will become:\n\t *\n\t * * `<paragraph>x</paragraph><paragraph>[]</paragraph>` with the option disabled (`doNotAutoparagraph == false`)\n\t * * `<paragraph>x[]</paragraph>` with the option enabled (`doNotAutoparagraph == true`).\n\t *\n\t * **Note:** if there is no valid position for the selection, the paragraph will always be created:\n\t *\n\t * `[<image src=\"foo.jpg\"></image>]` -> `<paragraph>[]</paragraph>`.\n\t */\n\tdeleteContent( selection, options ) {\n\t\tdeleteContent( this, selection, options );\n\t}\n\n\t/**\n\t * Modifies the selection. Currently, the supported modifications are:\n\t *\n\t * * Extending. The selection focus is moved in the specified `options.direction` with a step specified in `options.unit`.\n\t * Possible values for `unit` are:\n\t * * `'character'` (default) - moves selection by one user-perceived character. In most cases this means moving by one\n\t * character in `String` sense. However, unicode also defines \"combing marks\". These are special symbols, that combines\n\t * with a symbol before it (\"base character\") to create one user-perceived character. For example, `q̣̇` is a normal\n\t * letter `q` with two \"combining marks\": upper dot (`Ux0307`) and lower dot (`Ux0323`). For most actions, i.e. extending\n\t * selection by one position, it is correct to include both \"base character\" and all of it's \"combining marks\". That is\n\t * why `'character'` value is most natural and common method of modifying selection.\n\t * * `'codePoint'` - moves selection by one unicode code point. In contrary to, `'character'` unit, this will insert\n\t * selection between \"base character\" and \"combining mark\", because \"combining marks\" have their own unicode code points.\n\t * However, for technical reasons, unicode code points with values above `UxFFFF` are represented in native `String` by\n\t * two characters, called \"surrogate pairs\". Halves of \"surrogate pairs\" have a meaning only when placed next to each other.\n\t * For example `𨭎` is represented in `String` by `\\uD862\\uDF4E`. Both `\\uD862` and `\\uDF4E` do not have any meaning\n\t * outside the pair (are rendered as ? when alone). Position between them would be incorrect. In this case, selection\n\t * extension will include whole \"surrogate pair\".\n\t * * `'word'` - moves selection by a whole word.\n\t *\n\t * **Note:** if you extend a forward selection in a backward direction you will in fact shrink it.\n\t *\n\t * @fires modifySelection\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * The selection to modify.\n\t * @param {Object} [options]\n\t * @param {'forward'|'backward'} [options.direction='forward'] The direction in which the selection should be modified.\n\t * @param {'character'|'codePoint'|'word'} [options.unit='character'] The unit by which selection should be modified.\n\t */\n\tmodifySelection( selection, options ) {\n\t\tmodifySelection( this, selection, options );\n\t}\n\n\t/**\n\t * Gets a clone of the selected content.\n\t *\n\t * For example, for the following selection:\n\t *\n\t * ```html\n\t * <paragraph>x</paragraph>\n\t * <blockQuote>\n\t *\t<paragraph>y</paragraph>\n\t *\t<heading1>fir[st</heading1>\n\t * </blockQuote>\n\t * <paragraph>se]cond</paragraph>\n\t * <paragraph>z</paragraph>\n\t * ```\n\t *\n\t * It will return a document fragment with such a content:\n\t *\n\t * ```html\n\t * <blockQuote>\n\t *\t<heading1>st</heading1>\n\t * </blockQuote>\n\t * <paragraph>se</paragraph>\n\t * ```\n\t *\n\t * @fires getSelectedContent\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * The selection of which content will be returned.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tgetSelectedContent( selection ) {\n\t\treturn getSelectedContent( this, selection );\n\t}\n\n\t/**\n\t * Checks whether the given {@link module:engine/model/range~Range range} or\n\t * {@link module:engine/model/element~Element element} has any meaningful content.\n\t *\n\t * Meaningful content is:\n\t *\n\t * * any text node (`options.ignoreWhitespaces` allows controlling whether this text node must also contain\n\t * any non-whitespace characters),\n\t * * or any {@link module:engine/model/schema~Schema#isObject object element},\n\t * * or any {@link module:engine/model/markercollection~Marker marker} which\n\t * {@link module:engine/model/markercollection~Marker#_affectsData affects data}.\n\t *\n\t * This means that a range containing an empty `<paragraph></paragraph>` is not considered to have a meaningful content.\n\t * However, a range containing an `<image></image>` (which would normally be marked in the schema as an object element)\n\t * is considered non-empty.\n\t *\n\t * @param {module:engine/model/range~Range|module:engine/model/element~Element} rangeOrElement Range or element to check.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.ignoreWhitespaces] Whether text node with whitespaces only should be considered empty.\n\t * @returns {Boolean}\n\t */\n\thasContent( rangeOrElement, options ) {\n\t\tconst range = rangeOrElement instanceof ModelElement ? ModelRange._createIn( rangeOrElement ) : rangeOrElement;\n\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if there are any markers which affects data in this given range.\n\t\tfor ( const intersectingMarker of this.markers.getMarkersIntersectingRange( range ) ) {\n\t\t\tif ( intersectingMarker.affectsData ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\tconst { ignoreWhitespaces = false } = options || {};\n\n\t\tfor ( const item of range.getItems() ) {\n\t\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\t\tif ( !ignoreWhitespaces ) {\n\t\t\t\t\treturn true;\n\t\t\t\t} else if ( item.data.search( /\\S/ ) !== -1 ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t} else if ( this.schema.isObject( item ) ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Creates a position from the given root and path in that root.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionFromPath `Writer#createPositionFromPath()`}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionFromPath( root, path, stickiness ) {\n\t\treturn new ModelPosition( root, path, stickiness );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/model/position~Position position},\n\t * * a parent element and offset in that element,\n\t * * a parent element and `'end'` (the position will be set at the end of that element),\n\t * * a {@link module:engine/model/item~Item model item} and `'before'` or `'after'`\n\t * (the position will be set before or after the given model item).\n\t *\n\t * This method is a shortcut to other factory methods such as:\n\t *\n\t * * {@link module:engine/model/model~Model#createPositionBefore `createPositionBefore()`},\n\t * * {@link module:engine/model/model~Model#createPositionAfter `createPositionAfter()`}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionAt `Writer#createPositionAt()`},\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn ModelPosition._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionAfter `Writer#createPositionAfter()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn ModelPosition._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionBefore `Writer#createPositionBefore()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item before which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn ModelPosition._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from the `start` position to the `end` position.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createRange `Writer#createRange()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRange( start, end );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, the range will be collapsed\n\t * to the `start` position.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new ModelRange( start, end );\n\t}\n\n\t/**\n\t * Creates a range inside the given element which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createRangeIn `Writer#createRangeIn()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRangeIn( paragraph );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn ModelRange._createIn( element );\n\t}\n\n\t/**\n\t * Creates a range that starts before the given {@link module:engine/model/item~Item model item} and ends after it.\n\t *\n\t * Note: This method is also available on `writer` instance as\n\t * {@link module:engine/model/writer~Writer#createRangeOn `Writer.createRangeOn()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRangeOn( paragraph );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/item~Item} item\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn ModelRange._createOn( item );\n\t}\n\n\t/**\n\t * Creates a new selection instance based on the given {@link module:engine/model/selection~Selectable selectable}\n\t * or creates an empty selection if no arguments were passed.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createSelection `Writer#createSelection()`}.\n\t *\n\t *\t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\tconst selection = writer.createSelection( documentSelection );\n\t *\n\t *\t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates selection at the given offset in the given element.\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/model/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t *\t\t// Additional options (`'backward'`) can be specified as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @returns {module:engine/model/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new ModelSelection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/batch~Batch} instance.\n\t *\n\t * **Note:** In most cases creating a batch instance is not necessary as they are created when using:\n\t *\n\t * * {@link #change `change()`},\n\t * * {@link #enqueueChange `enqueueChange()`}.\n\t *\n\t * @param {'transparent'|'default'} [type='default'] The type of the batch.\n\t * @returns {module:engine/model/batch~Batch}\n\t */\n\tcreateBatch( type ) {\n\t\treturn new Batch( type );\n\t}\n\n\t/**\n\t * Removes all events listeners set by model instance and destroys {@link module:engine/model/document~Document}.\n\t */\n\tdestroy() {\n\t\tthis.document.destroy();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Common part of {@link module:engine/model/model~Model#change} and {@link module:engine/model/model~Model#enqueueChange}\n\t * which calls callbacks and returns array of values returned by these callbacks.\n\t *\n\t * @private\n\t * @returns {Array.<*>} Array of values returned by callbacks.\n\t */\n\t_runPendingChanges() {\n\t\tconst ret = [];\n\n\t\tthis.fire( '_beforeChanges' );\n\n\t\twhile ( this._pendingChanges.length ) {\n\t\t\t// Create a new writer using batch instance created for this chain of changes.\n\t\t\tconst currentBatch = this._pendingChanges[ 0 ].batch;\n\t\t\tthis._currentWriter = new Writer( this, currentBatch );\n\n\t\t\t// Execute changes callback and gather the returned value.\n\t\t\tconst callbackReturnValue = this._pendingChanges[ 0 ].callback( this._currentWriter );\n\t\t\tret.push( callbackReturnValue );\n\n\t\t\tthis.document._handleChangeBlock( this._currentWriter );\n\n\t\t\tthis._pendingChanges.shift();\n\t\t\tthis._currentWriter = null;\n\t\t}\n\n\t\tthis.fire( '_afterChanges' );\n\n\t\treturn ret;\n\t}\n\n\t/**\n\t * Fired when entering the outermost {@link module:engine/model/model~Model#enqueueChange} or\n\t * {@link module:engine/model/model~Model#change} block.\n\t *\n\t * @protected\n\t * @event _beforeChanges\n\t */\n\n\t/**\n\t * Fired when leaving the outermost {@link module:engine/model/model~Model#enqueueChange} or\n\t * {@link module:engine/model/model~Model#change} block.\n\t *\n\t * @protected\n\t * @event _afterChanges\n\t */\n\n\t/**\n\t * Fired every time any {@link module:engine/model/operation/operation~Operation operation} is applied on the model\n\t * using {@link #applyOperation}.\n\t *\n\t * Note that this event is suitable only for very specific use-cases. Use it if you need to listen to every single operation\n\t * applied on the document. However, in most cases {@link module:engine/model/document~Document#event:change} should\n\t * be used.\n\t *\n\t * A few callbacks are already added to this event by engine internal classes:\n\t *\n\t * * with `highest` priority operation is validated,\n\t * * with `normal` priority operation is executed,\n\t * * with `low` priority the {@link module:engine/model/document~Document} updates its version,\n\t * * with `low` priority {@link module:engine/model/liveposition~LivePosition} and {@link module:engine/model/liverange~LiveRange}\n\t * update themselves.\n\t *\n\t * @event applyOperation\n\t * @param {Array} args Arguments of the `applyOperation` which is an array with a single element - applied\n\t * {@link module:engine/model/operation/operation~Operation operation}.\n\t */\n\n\t/**\n\t * Event fired when {@link #insertContent} method is called.\n\t *\n\t * The {@link #insertContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * **Note** The `selectable` parameter for the {@link #insertContent} is optional. When `undefined` value is passed the method uses\n\t * `model.document.selection`.\n\t *\n\t * @event insertContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #deleteContent} method is called.\n\t *\n\t * The {@link #deleteContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event deleteContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #modifySelection} method is called.\n\t *\n\t * The {@link #modifySelection default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event modifySelection\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #getSelectedContent} method is called.\n\t *\n\t * The {@link #getSelectedContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event getSelectedContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n}\n\nmix( Model, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/keystrokehandler\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport { getCode, parseKeystroke } from './keyboard';\n\n/**\n * Keystroke handler allows registering callbacks for given keystrokes.\n *\n * The most frequent use of this class is through the {@link module:core/editor/editor~Editor#keystrokes `editor.keystrokes`}\n * property. It allows listening to keystrokes executed in the editing view:\n *\n *\t\teditor.keystrokes.set( 'Ctrl+A', ( keyEvtData, cancel ) => {\n *\t\t\tconsole.log( 'Ctrl+A has been pressed' );\n *\t\t\tcancel();\n *\t\t} );\n *\n * However, this utility class can be used in various part of the UI. For instance, a certain {@link module:ui/view~View}\n * can use it like this:\n *\n *\t\tclass MyView extends View {\n *\t\t\tconstructor() {\n *\t\t\t\tthis.keystrokes = new KeystrokeHandler();\n *\n * \t\t\t\tthis.keystrokes.set( 'tab', handleTabKey );\n *\t\t\t}\n *\n *\t\t\trender() {\n *\t\t\t\tsuper.render();\n *\n *\t\t\t\tthis.keystrokes.listenTo( this.element );\n *\t\t\t}\n *\t\t}\n *\n * That keystroke handler will listen to `keydown` events fired in this view's main element.\n *\n */\nexport default class KeystrokeHandler {\n\t/**\n\t * Creates an instance of the keystroke handler.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Listener used to listen to events for easier keystroke handler destruction.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/dom/emittermixin~Emitter}\n\t\t */\n\t\tthis._listener = Object.create( DomEmitterMixin );\n\t}\n\n\t/**\n\t * Starts listening for `keydown` events from a given emitter.\n\t *\n\t * @param {module:utils/emittermixin~Emitter} emitter\n\t */\n\tlistenTo( emitter ) {\n\t\t// The #_listener works here as a kind of dispatcher. It groups the events coming from the same\n\t\t// keystroke so the listeners can be attached to them with different priorities.\n\t\t//\n\t\t// E.g. all the keystrokes with the `keyCode` of 42 coming from the `emitter` are propagated\n\t\t// as a `_keydown:42` event by the `_listener`. If there's a callback created by the `set`\n\t\t// method for this 42 keystroke, it listens to the `_listener#_keydown:42` event only and interacts\n\t\t// only with other listeners of this particular event, thus making it possible to prioritize\n\t\t// the listeners and safely cancel execution, when needed. Instead of duplicating the Emitter logic,\n\t\t// the KeystrokeHandler re–uses it to do its job.\n\t\tthis._listener.listenTo( emitter, 'keydown', ( evt, keyEvtData ) => {\n\t\t\tthis._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t\t} );\n\t}\n\n\t/**\n\t * Registers a handler for the specified keystroke.\n\t *\n\t * @param {String|Array.<String|Number>} keystroke Keystroke defined in a format accepted by\n\t * the {@link module:utils/keyboard~parseKeystroke} function.\n\t * @param {Function} callback A function called with the\n\t * {@link module:engine/view/observer/keyobserver~KeyEventData key event data} object and\n\t * a helper funcion to call both `preventDefault()` and `stopPropagation()` on the underlying event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of the keystroke\n\t * callback. The higher the priority value the sooner the callback will be executed. Keystrokes having the same priority\n\t * are called in the order they were added.\n\t */\n\tset( keystroke, callback, options = {} ) {\n\t\tconst keyCode = parseKeystroke( keystroke );\n\t\tconst priority = options.priority;\n\n\t\t// Execute the passed callback on KeystrokeHandler#_keydown.\n\t\t// TODO: https://github.com/ckeditor/ckeditor5-utils/issues/144\n\t\tthis._listener.listenTo( this._listener, '_keydown:' + keyCode, ( evt, keyEvtData ) => {\n\t\t\tcallback( keyEvtData, () => {\n\t\t\t\t// Stop the event in the DOM: no listener in the web page\n\t\t\t\t// will be triggered by this event.\n\t\t\t\tkeyEvtData.preventDefault();\n\t\t\t\tkeyEvtData.stopPropagation();\n\n\t\t\t\t// Stop the event in the KeystrokeHandler: no more callbacks\n\t\t\t\t// will be executed for this keystroke.\n\t\t\t\tevt.stop();\n\t\t\t} );\n\n\t\t\t// Mark this keystroke as handled by the callback. See: #press.\n\t\t\tevt.return = true;\n\t\t}, { priority } );\n\t}\n\n\t/**\n\t * Triggers a keystroke handler for a specified key combination, if such a keystroke was {@link #set defined}.\n\t *\n\t * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEvtData Key event data.\n\t * @returns {Boolean} Whether the keystroke was handled.\n\t */\n\tpress( keyEvtData ) {\n\t\treturn !!this._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t}\n\n\t/**\n\t * Destroys the keystroke handler.\n\t */\n\tdestroy() {\n\t\tthis._listener.stopListening();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editingkeystrokehandler\n */\n\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\n/**\n * A keystroke handler for editor editing. Its instance is available\n * in {@link module:core/editor/editor~Editor#keystrokes} so plugins\n * can register their keystrokes.\n *\n * E.g. an undo plugin would do this:\n *\n *\t\teditor.keystrokes.set( 'Ctrl+Z', 'undo' );\n *\t\teditor.keystrokes.set( 'Ctrl+Shift+Z', 'redo' );\n *\t\teditor.keystrokes.set( 'Ctrl+Y', 'redo' );\n *\n * @extends module:utils/keystrokehandler~KeystrokeHandler\n */\nexport default class EditingKeystrokeHandler extends KeystrokeHandler {\n\t/**\n\t * Creates an instance of the keystroke handler.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t */\n\tconstructor( editor ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * The editor instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\t}\n\n\t/**\n\t * Registers a handler for the specified keystroke.\n\t *\n\t * The handler can be specified as a command name or a callback.\n\t *\n\t * @param {String|Array.<String|Number>} keystroke Keystroke defined in a format accepted by\n\t * the {@link module:utils/keyboard~parseKeystroke} function.\n\t * @param {Function|String} callback If a string is passed, then the keystroke will\n\t * {@link module:core/editor/editor~Editor#execute execute a command}.\n\t * If a function, then it will be called with the\n\t * {@link module:engine/view/observer/keyobserver~KeyEventData key event data} object and\n\t * a `cancel()` helper to both `preventDefault()` and `stopPropagation()` of the event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of the keystroke\n\t * callback. The higher the priority value the sooner the callback will be executed. Keystrokes having the same priority\n\t * are called in the order they were added.\n\t */\n\tset( keystroke, callback, options = {} ) {\n\t\tif ( typeof callback == 'string' ) {\n\t\t\tconst commandName = callback;\n\n\t\t\tcallback = ( evtData, cancel ) => {\n\t\t\t\tthis.editor.execute( commandName );\n\t\t\t\tcancel();\n\t\t\t};\n\t\t}\n\n\t\tsuper.set( keystroke, callback, options );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/editor\n */\n\nimport Config from '@ckeditor/ckeditor5-utils/src/config';\nimport EditingController from '@ckeditor/ckeditor5-engine/src/controller/editingcontroller';\nimport PluginCollection from '../plugincollection';\nimport CommandCollection from '../commandcollection';\nimport Locale from '@ckeditor/ckeditor5-utils/src/locale';\nimport DataController from '@ckeditor/ckeditor5-engine/src/controller/datacontroller';\nimport Conversion from '@ckeditor/ckeditor5-engine/src/conversion/conversion';\nimport Model from '@ckeditor/ckeditor5-engine/src/model/model';\nimport EditingKeystrokeHandler from '../editingkeystrokehandler';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Class representing a basic, generic editor.\n *\n * Check out the list of its subclasses to learn about specific editor implementations.\n *\n * All editor implementations (like {@link module:editor-classic/classiceditor~ClassicEditor} or\n * {@link module:editor-inline/inlineeditor~InlineEditor}) should extend this class. They can add their\n * own methods and properties.\n *\n * When you are implementing a plugin, then this editor represents the API\n * which your plugin can expect to get when using its {@link module:core/plugin~Plugin#editor} property.\n *\n * This API should be sufficient in order to implement the \"editing\" part of your feature\n * (schema definition, conversion, commands, keystrokes, etc.).\n * It does not define the editor UI, which is available only if the\n * the specific editor implements also the {@link module:core/editor/editorwithui~EditorWithUI} interface\n * (as most editor implementations do).\n *\n * @abstract\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Editor {\n\t/**\n\t * Creates a new instance of the Editor class.\n\t *\n\t * Usually, not to be used directly. See the static {@link module:core/editor/editor~Editor.create `create()`} method.\n\t *\n\t * @param {Object} [config] The editor config.\n\t */\n\tconstructor( config ) {\n\t\tconst availablePlugins = this.constructor.builtinPlugins;\n\n\t\t/**\n\t\t * Holds all configurations specific to this editor instance.\n\t\t *\n\t\t *\t\teditor.config.get( 'image.toolbar' );\n\t\t *\t\t// -> [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/config~Config}\n\t\t */\n\t\tthis.config = new Config( config, this.constructor.defaultConfig );\n\n\t\tthis.config.define( 'plugins', availablePlugins );\n\n\t\t/**\n\t\t * The plugins loaded and in use by this editor instance.\n\t\t *\n\t\t *\t\teditor.plugins.get( 'Clipboard' ); // -> instance of the Clipboard plugin.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/plugincollection~PluginCollection}\n\t\t */\n\t\tthis.plugins = new PluginCollection( this, availablePlugins );\n\n\t\t/**\n\t\t * Commands registered to the editor.\n\t\t *\n\t\t * Use the shorthand {@link #execute `editor.execute()`} method to execute commands:\n\t\t *\n\t\t *\t\t// Execute the bold command:\n\t\t *\t\teditor.execute( 'bold' );\n\t\t *\n\t\t *\t\t// Check the state of the bold command:\n\t\t *\t\teditor.commands.get( 'bold' ).value;\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/commandcollection~CommandCollection}\n\t\t */\n\t\tthis.commands = new CommandCollection();\n\n\t\tconst languageConfig = this.config.get( 'language' ) || {};\n\n\t\t/**\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = new Locale( {\n\t\t\tuiLanguage: typeof languageConfig === 'string' ? languageConfig : languageConfig.ui,\n\t\t\tcontentLanguage: this.config.get( 'language.content' )\n\t\t} );\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method #t\n\t\t */\n\t\tthis.t = this.locale.t;\n\n\t\t/**\n\t\t * Indicates the editor life-cycle state.\n\t\t *\n\t\t * The editor is in one of the following states:\n\t\t *\n\t\t * * `initializing` - during the editor initialization (before {@link module:core/editor/editor~Editor.create `Editor.create()`})\n\t\t * finished its job,\n\t\t * * `ready` - after the promise returned by the {@link module:core/editor/editor~Editor.create `Editor.create()`}\n\t\t * method is resolved,\n\t\t * * `destroyed` - once the {@link #destroy `editor.destroy()`} method was called.\n\t\t *\n\t\t * @observable\n\t\t * @member {'initializing'|'ready'|'destroyed'} #state\n\t\t */\n\t\tthis.set( 'state', 'initializing' );\n\t\tthis.once( 'ready', () => ( this.state = 'ready' ), { priority: 'high' } );\n\t\tthis.once( 'destroy', () => ( this.state = 'destroyed' ), { priority: 'high' } );\n\n\t\t/**\n\t\t * Defines whether this editor is in read-only mode.\n\t\t *\n\t\t * In read-only mode the editor {@link #commands commands} are disabled so it is not possible\n\t\t * to modify the document by using them. Also, the editable element(s) become non-editable.\n\t\t *\n\t\t * In order to make the editor read-only, you can set this value directly:\n\t\t *\n\t\t *\t\teditor.isReadOnly = true;\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * The editor's model.\n\t\t *\n\t\t * The central point of the editor's abstract data model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = new Model();\n\n\t\t/**\n\t\t * The {@link module:engine/controller/datacontroller~DataController data controller}.\n\t\t * Used e.g. for setting and retrieving editor data.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/datacontroller~DataController}\n\t\t */\n\t\tthis.data = new DataController( this.model );\n\n\t\t/**\n\t\t * The {@link module:engine/controller/editingcontroller~EditingController editing controller}.\n\t\t * Controls user input and rendering the content for editing.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/editingcontroller~EditingController}\n\t\t */\n\t\tthis.editing = new EditingController( this.model );\n\t\tthis.editing.view.document.bind( 'isReadOnly' ).to( this );\n\n\t\t/**\n\t\t * Conversion manager through which you can register model to view and view to model converters.\n\t\t *\n\t\t * See {@link module:engine/conversion/conversion~Conversion}'s documentation to learn how to add converters.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/conversion~Conversion}\n\t\t */\n\t\tthis.conversion = new Conversion( [ this.editing.downcastDispatcher, this.data.downcastDispatcher ], this.data.upcastDispatcher );\n\t\tthis.conversion.addAlias( 'dataDowncast', this.data.downcastDispatcher );\n\t\tthis.conversion.addAlias( 'editingDowncast', this.editing.downcastDispatcher );\n\n\t\t/**\n\t\t * Instance of the {@link module:core/editingkeystrokehandler~EditingKeystrokeHandler}.\n\t\t *\n\t\t * It allows setting simple keystrokes:\n\t\t *\n\t\t *\t\t// Execute the bold command on Ctrl+E:\n\t\t *\t\teditor.keystrokes.set( 'Ctrl+E', 'bold' );\n\t\t *\n\t\t *\t\t// Execute your own callback:\n\t\t *\t\teditor.keystrokes.set( 'Ctrl+E', ( data, cancel ) => {\n\t\t *\t\t\tconsole.log( data.keyCode );\n\t\t *\n\t\t *\t\t\t// Prevent default (native) action and stop the underlying keydown event\n\t\t *\t\t\t// so no other editor feature will interfere.\n\t\t *\t\t\tcancel();\n\t\t *\t\t} );\n\t\t *\n\t\t * Note: Certain, typing oriented keystrokes (like <kbd>Backspace</kbd> or <kbd>Enter</kbd>) are handled\n\t\t * by low level mechanism and trying to listen to them via the keystroke handler will not work reliably.\n\t\t * To handle those specific keystrokes see the events fired by the\n\t\t * {@link module:engine/view/document~Document editing view document} (`editor.editing.view.document`).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editingkeystrokehandler~EditingKeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new EditingKeystrokeHandler( this );\n\t\tthis.keystrokes.listenTo( this.editing.view.document );\n\t}\n\n\t/**\n\t * Loads and initializes plugins specified in the config.\n\t *\n\t * @returns {Promise.<module:core/plugin~LoadedPlugins>} A promise which resolves\n\t * once the initialization is completed providing an array of loaded plugins.\n\t */\n\tinitPlugins() {\n\t\tconst config = this.config;\n\t\tconst plugins = config.get( 'plugins' ) || [];\n\t\tconst removePlugins = config.get( 'removePlugins' ) || [];\n\t\tconst extraPlugins = config.get( 'extraPlugins' ) || [];\n\n\t\treturn this.plugins.init( plugins.concat( extraPlugins ), removePlugins );\n\t}\n\n\t/**\n\t * Destroys the editor instance, releasing all resources used by it.\n\t *\n\t * **Note** The editor cannot be destroyed during the initialization phase so if it is called\n\t * while the editor {@link #state is being initialized}, it will wait for the editor initialization before destroying it.\n\t *\n\t * @fires destroy\n\t * @returns {Promise} A promise that resolves once the editor instance is fully destroyed.\n\t */\n\tdestroy() {\n\t\tlet readyPromise = Promise.resolve();\n\n\t\tif ( this.state == 'initializing' ) {\n\t\t\treadyPromise = new Promise( resolve => this.once( 'ready', resolve ) );\n\t\t}\n\n\t\treturn readyPromise\n\t\t\t.then( () => {\n\t\t\t\tthis.fire( 'destroy' );\n\t\t\t\tthis.stopListening();\n\t\t\t\tthis.commands.destroy();\n\t\t\t} )\n\t\t\t.then( () => this.plugins.destroy() )\n\t\t\t.then( () => {\n\t\t\t\tthis.model.destroy();\n\t\t\t\tthis.data.destroy();\n\t\t\t\tthis.editing.destroy();\n\t\t\t\tthis.keystrokes.destroy();\n\t\t\t} );\n\t}\n\n\t/**\n\t * Executes specified command with given parameters.\n\t *\n\t * Shorthand for:\n\t *\n\t *\t\teditor.commands.get( commandName ).execute( ... );\n\t *\n\t * @param {String} commandName Name of command to execute.\n\t * @param {*} [...commandParams] Command parameters.\n\t */\n\texecute( ...args ) {\n\t\ttry {\n\t\t\tthis.commands.execute( ...args );\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and initializes a new editor instance.\n\t *\n\t * This is an abstract method. Every editor type needs to implement its own initialization logic.\n\t *\n\t * See the `create()` methods of the existing editor types to learn how to use them:\n\t *\n\t * * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}\n\t * * {@link module:editor-balloon/ballooneditor~BalloonEditor.create `BalloonEditor.create()`}\n\t * * {@link module:editor-decoupled/decouplededitor~DecoupledEditor.create `DecoupledEditor.create()`}\n\t * * {@link module:editor-inline/inlineeditor~InlineEditor.create `InlineEditor.create()`}\n\t *\n\t * @abstract\n\t * @method module:core/editor/editor~Editor.create\n\t */\n}\n\nmix( Editor, ObservableMixin );\n\n/**\n * Fired when {@link module:engine/controller/datacontroller~DataController#event:ready data} and all additional\n * editor components are ready.\n *\n * Note: This event is most useful for plugin developers. When integrating the editor with your website or\n * application you do not have to listen to `editor#ready` because when the promise returned by the static\n * {@link module:core/editor/editor~Editor.create `Editor.create()`} event is resolved, the editor is already ready.\n * In fact, since the first moment when the editor instance is available to you is inside `then()`'s callback,\n * you cannot even add a listener to the `editor#ready` event.\n *\n * See also the {@link #state `editor.state`} property.\n *\n * @event ready\n */\n\n/**\n * Fired when this editor instance is destroyed. The editor at this point is not usable and this event should be used to\n * perform the clean-up in any plugin.\n *\n *\n * See also the {@link #state `editor.state`} property.\n *\n * @event destroy\n */\n\n/**\n * This error is thrown when a user tries to use a `<textarea>` element to create a non-classic editor in it.\n *\n * Textarea element represents a plain-text and cannot be used as a editable root element with included CKEditor5.\n * Content of an editor should be nicely present to the user and show him how it's going to looks like. Textarea element\n * doesn't support such behavior.\n *\n * Typically you can use a `div` for storing editor content instead:\n *\n *\t\t<div id=\"editor\">\n *\t\t\t<p>Initial content.</p>\n *\t\t</div>\n *\n * Only {@glink builds/guides/overview#classic-editor Classic Editor} has implemented a special system, which\n * **replace** DOM element and load data from it\n * ({@link module:editor-classic/classiceditor~ClassicEditor.create more information}). All other editors\n * use an existing element, load data from it and make this element editable. Details about behaviour of each editor\n * might be found in an associated description of a `create` method of each editor.\n *\n * @error editor-wrong-element\n */\n\n/**\n * An array of plugins built into this editor class.\n * It is used in CKEditor 5 builds to provide a list of plugins which are later automatically initialized\n * during the editor initialization.\n *\n * They will be automatically initialized by the editor, unless listed in `config.removePlugins` and\n * unless `config.plugins` is passed.\n *\n *\t\t// Build some plugins into the editor class first.\n *\t\tClassicEditor.builtinPlugins = [ FooPlugin, BarPlugin ];\n *\n *\t\t// Normally, you need to define config.plugins, but since ClassicEditor.builtinPlugins was\n *\t\t// defined, now you can call create() without any configuration.\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> instance of the Foo plugin\n *\t\t\t\teditor.plugins.get( BarPlugin ); // -> instance of the Bar plugin\n *\t\t\t} );\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, {\n *\t\t\t\t// Don't initialize this plugins (note: it's defined by a string):\n *\t\t\t\tremovePlugins: [ 'Foo' ]\n *\t\t\t} )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> undefined\n *\t\t\t\teditor.config.get( BarPlugin ); // -> instance of the Bar plugin\n *\t\t\t} );\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, {\n *\t\t\t\t// Load only this plugin. Can also be define by a string if\n *\t\t\t\t// this plugin was built into the editor class.\n *\t\t\t\tplugins: [ FooPlugin ]\n *\t\t\t} )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> instance of the Foo plugin\n *\t\t\t\teditor.config.get( BarPlugin ); // -> undefined\n *\t\t\t} );\n *\n * See also {@link module:core/editor/editor~Editor.defaultConfig}.\n *\n * @static\n * @member {Array.<Function>} module:core/editor/editor~Editor.builtinPlugins\n */\n\n/**\n * The default config which is built into the editor class.\n * It is used in CKEditor 5 builds to provide the default config options which are later used during editor initialization.\n *\n *\t\tClassicEditor.defaultConfig = {\n *\t\t\tfoo: 1,\n *\t\t\tbar: 2\n *\t\t};\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.config.get( 'foo' ); // -> 1\n *\t\t\t\teditor.config.get( 'bar' ); // -> 2\n *\t\t\t} );\n *\n *\t\t// The default options can be overridden by the config passed to create().\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, { bar: 3 } )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.config.get( 'foo' ); // -> 1\n *\t\t\t\teditor.config.get( 'bar' ); // -> 3\n *\t\t\t} );\n *\n * See also {@link module:core/editor/editor~Editor.builtinPlugins}.\n *\n * @static\n * @member {Object} module:core/editor/editor~Editor.defaultConfig\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/utils/dataapimixin\n */\n\n/**\n * Implementation of the {@link module:core/editor/utils/dataapimixin~DataApi}.\n *\n * @mixin DataApiMixin\n * @implements module:core/editor/utils/dataapimixin~DataApi\n */\nconst DataApiMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tsetData( data ) {\n\t\tthis.data.set( data );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tgetData( options ) {\n\t\treturn this.data.get( options );\n\t}\n};\n\nexport default DataApiMixin;\n\n/**\n * Interface defining editor methods for setting and getting data to and from the editor's main root element\n * using the {@link module:core/editor/editor~Editor#data data pipeline}.\n *\n * This interface is not a part of the {@link module:core/editor/editor~Editor} class because one may want to implement\n * an editor with multiple root elements, in which case the methods for setting and getting data will need to be implemented\n * differently.\n *\n * @interface DataApi\n */\n\n/**\n * Sets the data in the editor.\n *\n *\t\teditor.setData( '<p>This is editor!</p>' );\n *\n * By default the editor accepts HTML. This can be controlled by injecting a different data processor.\n * See the {@glink features/markdown Markdown output} guide for more details.\n *\n * Note: Not only is the format of the data configurable, but the type of the `setData()`'s parameter does not\n * have to be a string either. You can e.g. accept an object or a DOM `DocumentFragment` if you consider this\n * the right format for you.\n *\n * @method #setData\n * @param {String} data Input data.\n */\n\n/**\n * Gets the data from the editor.\n *\n *\t\teditor.getData(); // -> '<p>This is editor!</p>'\n *\n * By default the editor outputs HTML. This can be controlled by injecting a different data processor.\n * See the {@glink features/markdown Markdown output} guide for more details.\n *\n * Note: Not only is the format of the data configurable, but the type of the `getData()`'s return value does not\n * have to be a string either. You can e.g. return an object or a DOM `DocumentFragment` if you consider this\n * the right format for you.\n *\n * @method #getData\n * @param {Object} [options]\n * @param {String} [options.rootName='main'] Root name.\n * @param {String} [options.trim='empty'] Whether returned data should be trimmed. This option is set to `'empty'` by default,\n * which means that whenever editor content is considered empty, an empty string is returned. To turn off trimming\n * use `'none'`. In such cases exact content will be returned (for example `'<p> </p>'` for an empty editor).\n * @returns {String} Output data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport setDataInElement from '@ckeditor/ckeditor5-utils/src/dom/setdatainelement';\n\n/**\n * @module core/editor/utils/elementapimixin\n */\n\n/**\n * Implementation of the {@link module:core/editor/utils/elementapimixin~ElementApi}.\n *\n * @mixin ElementApiMixin\n * @implements module:core/editor/utils/elementapimixin~ElementApi\n */\nconst ElementApiMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tupdateSourceElement() {\n\t\tif ( !this.sourceElement ) {\n\t\t\t/**\n\t\t\t * Cannot update the source element of a detached editor.\n\t\t\t *\n\t\t\t * The {@link ~ElementApi#updateSourceElement `updateSourceElement()`} method cannot be called if you did not\n\t\t\t * pass an element to `Editor.create()`.\n\t\t\t *\n\t\t\t * @error editor-missing-sourceelement\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'editor-missing-sourceelement: Cannot update the source element of a detached editor.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tsetDataInElement( this.sourceElement, this.data.get() );\n\t}\n};\n\nexport default ElementApiMixin;\n\n/**\n * Interface describing an editor that replaced a DOM element (was \"initialized on an element\").\n *\n * Such an editor should provide a method to\n * {@link module:core/editor/utils/elementapimixin~ElementApi#updateSourceElement update the replaced element with the current data}.\n *\n * @interface ElementApi\n */\n\n/**\n * The element on which the editor has been initialized.\n *\n * @readonly\n * @member {HTMLElement} #sourceElement\n */\n\n/**\n * Updates the {@link #sourceElement editor source element}'s content with the data.\n *\n * @method #updateSourceElement\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/setdatainelement\n */\n\n/* globals HTMLTextAreaElement */\n\n/**\n * Sets data in a given element.\n *\n * @param {HTMLElement} el The element in which the data will be set.\n * @param {String} data The data string.\n */\nexport default function setDataInElement( el, data ) {\n\tif ( el instanceof HTMLTextAreaElement ) {\n\t\tel.value = data;\n\t}\n\n\tel.innerHTML = data;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/dataprocessor/basichtmlwriter\n */\n\n/* globals document */\n\n/**\n * Basic HTML writer. It uses the native `innerHTML` property for basic conversion\n * from a document fragment to an HTML string.\n *\n * @implements module:engine/dataprocessor/htmlwriter~HtmlWriter\n */\nexport default class BasicHtmlWriter {\n\t/**\n\t * Returns an HTML string created from the document fragment.\n\t *\n\t * @param {DocumentFragment} fragment\n\t * @returns {String}\n\t */\n\tgetHtml( fragment ) {\n\t\tconst doc = document.implementation.createHTMLDocument( '' );\n\t\tconst container = doc.createElement( 'div' );\n\t\tcontainer.appendChild( fragment );\n\n\t\treturn container.innerHTML;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/dataprocessor/htmldataprocessor\n */\n\n/* globals document, DOMParser */\n\nimport BasicHtmlWriter from './basichtmlwriter';\nimport DomConverter from '../view/domconverter';\n\n/**\n * The HTML data processor class.\n * This data processor implementation uses HTML as input and output data.\n *\n * @implements module:engine/dataprocessor/dataprocessor~DataProcessor\n */\nexport default class HtmlDataProcessor {\n\t/**\n\t * Creates a new instance of the HTML data processor class.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * A DOM parser instance used to parse an HTML string to an HTML document.\n\t\t *\n\t\t * @private\n\t\t * @member {DOMParser}\n\t\t */\n\t\tthis._domParser = new DOMParser();\n\n\t\t/**\n\t\t * A DOM converter used to convert DOM elements to view elements.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis._domConverter = new DomConverter( { blockFillerMode: 'nbsp' } );\n\n\t\t/**\n\t\t * A basic HTML writer instance used to convert DOM elements to an HTML string.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/dataprocessor/basichtmlwriter~BasicHtmlWriter}\n\t\t */\n\t\tthis._htmlWriter = new BasicHtmlWriter();\n\t}\n\n\t/**\n\t * Converts a provided {@link module:engine/view/documentfragment~DocumentFragment document fragment}\n\t * to data format — in this case to an HTML string.\n\t *\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment\n\t * @returns {String} HTML string.\n\t */\n\ttoData( viewFragment ) {\n\t\t// Convert view DocumentFragment to DOM DocumentFragment.\n\t\tconst domFragment = this._domConverter.viewToDom( viewFragment, document );\n\n\t\t// Convert DOM DocumentFragment to HTML output.\n\t\treturn this._htmlWriter.getHtml( domFragment );\n\t}\n\n\t/**\n\t * Converts the provided HTML string to a view tree.\n\t *\n\t * @param {String} data An HTML string.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} A converted view element.\n\t */\n\ttoView( data ) {\n\t\t// Convert input HTML data to DOM DocumentFragment.\n\t\tconst domFragment = this._toDom( data );\n\n\t\t// Convert DOM DocumentFragment to view DocumentFragment.\n\t\treturn this._domConverter.domToView( domFragment );\n\t}\n\n\t/**\n\t * Converts an HTML string to its DOM representation. Returns a document fragment containing nodes parsed from\n\t * the provided data.\n\t *\n\t * @private\n\t * @param {String} data\n\t * @returns {DocumentFragment}\n\t */\n\t_toDom( data ) {\n\t\tconst document = this._domParser.parseFromString( data, 'text/html' );\n\t\tconst fragment = document.createDocumentFragment();\n\t\tconst nodes = document.body.childNodes;\n\n\t\twhile ( nodes.length > 0 ) {\n\t\t\tfragment.appendChild( nodes[ 0 ] );\n\t\t}\n\n\t\treturn fragment;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/componentfactory\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * A helper class implementing the UI component ({@link module:ui/view~View view}) factory.\n *\n * It allows functions producing specific UI components to be registered under their unique names\n * in the factory. A registered component can be then instantiated by providing its name.\n * Note that names are case insensitive.\n *\n *\t\t// The editor provides localization tools for the factory.\n *\t\tconst factory = new ComponentFactory( editor );\n *\n *\t\tfactory.add( 'foo', locale => new FooView( locale ) );\n *\t\tfactory.add( 'bar', locale => new BarView( locale ) );\n *\n *\t\t// An instance of FooView.\n *\t\tconst fooInstance = factory.create( 'foo' );\n *\n *\t\t// Names are case insensitive so this is also allowed:\n *\t\tconst barInstance = factory.create( 'Bar' );\n *\n * The {@link module:core/editor/editor~Editor#locale editor locale} is passed to the factory\n * function when {@link module:ui/componentfactory~ComponentFactory#create} is called.\n */\nexport default class ComponentFactory {\n\t/**\n\t * Creates an instance of the factory.\n\t *\n\t * @constructor\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor instance that the factory belongs to.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * Registered component factories.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._components = new Map();\n\t}\n\n\t/**\n\t * Returns an iterator of registered component names. Names are returned in lower case.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* names() {\n\t\tfor ( const value of this._components.values() ) {\n\t\t\tyield value.originalName;\n\t\t}\n\t}\n\n\t/**\n\t * Registers a component factory function that will be used by the\n\t * {@link #create create} method and called with the\n\t * {@link module:core/editor/editor~Editor#locale editor locale} as an argument,\n\t * allowing localization of the {@link module:ui/view~View view}.\n\t *\n\t * @param {String} name The name of the component.\n\t * @param {Function} callback The callback that returns the component.\n\t */\n\tadd( name, callback ) {\n\t\tif ( this.has( name ) ) {\n\t\t\t/**\n\t\t\t * The item already exists in the component factory.\n\t\t\t *\n\t\t\t * @error componentfactory-item-exists\n\t\t\t * @param {String} name The name of the component.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'componentfactory-item-exists: The item already exists in the component factory.',\n\t\t\t\tthis,\n\t\t\t\t{ name }\n\t\t\t);\n\t\t}\n\n\t\tthis._components.set( getNormalized( name ), { callback, originalName: name } );\n\t}\n\n\t/**\n\t * Creates an instance of a component registered in the factory under a specific name.\n\t *\n\t * When called, the {@link module:core/editor/editor~Editor#locale editor locale} is passed to\n\t * the previously {@link #add added} factory function, allowing localization of the\n\t * {@link module:ui/view~View view}.\n\t *\n\t * @param {String} name The name of the component.\n\t * @returns {module:ui/view~View} The instantiated component view.\n\t */\n\tcreate( name ) {\n\t\tif ( !this.has( name ) ) {\n\t\t\t/**\n\t\t\t * The required component is not registered in the component factory. Please make sure\n\t\t\t * the provided name is correct and the component has been correctly\n\t\t\t * {@link #add added} to the factory.\n\t\t\t *\n\t\t\t * @error componentfactory-item-missing\n\t\t\t * @param {String} name The name of the missing component.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'componentfactory-item-missing: The required component is not registered in the factory.',\n\t\t\t\tthis,\n\t\t\t\t{ name }\n\t\t\t);\n\t\t}\n\n\t\treturn this._components.get( getNormalized( name ) ).callback( this.editor.locale );\n\t}\n\n\t/**\n\t * Checks if a component of a given name is registered in the factory.\n\t *\n\t * @param {String} name The name of the component.\n\t * @returns {Boolean}\n\t */\n\thas( name ) {\n\t\treturn this._components.has( getNormalized( name ) );\n\t}\n}\n\n//\n// Ensures that the component name used as the key in the internal map is in lower case.\n//\n// @private\n// @param {String} name\n// @returns {String}\nfunction getNormalized( name ) {\n\treturn String( name ).toLowerCase();\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* global setTimeout, clearTimeout */\n\n/**\n * @module utils/focustracker\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport ObservableMixin from './observablemixin';\nimport CKEditorError from './ckeditorerror';\nimport mix from './mix';\n\n/**\n * Allows observing a group of `HTMLElement`s whether at least one of them is focused.\n *\n * Used by the {@link module:core/editor/editor~Editor} in order to track whether the focus is still within the application,\n * or were used outside of its UI.\n *\n * **Note** `focus` and `blur` listeners use event capturing, so it is only needed to register wrapper `HTMLElement`\n * which contain other `focusable` elements. But note that this wrapper element has to be focusable too\n * (have e.g. `tabindex=\"-1\"`).\n *\n * @mixes module:utils/dom/emittermixin~EmitterMixin\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class FocusTracker {\n\tconstructor() {\n\t\t/**\n\t\t * True when one of the registered elements is focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The currently focused element.\n\t\t *\n\t\t * While {@link #isFocused `isFocused`} remains `true`, the focus can\n\t\t * move between different UI elements. This property tracks those\n\t\t * elements and tells which one is currently focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {HTMLElement|null}\n\t\t */\n\t\tthis.set( 'focusedElement', null );\n\n\t\t/**\n\t\t * List of registered elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<HTMLElement>}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Event loop timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number}\n\t\t */\n\t\tthis._nextEventLoopTimeout = null;\n\t}\n\n\t/**\n\t * Starts tracking the specified element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tadd( element ) {\n\t\tif ( this._elements.has( element ) ) {\n\t\t\tthrow new CKEditorError( 'focusTracker-add-element-already-exist', this );\n\t\t}\n\n\t\tthis.listenTo( element, 'focus', () => this._focus( element ), { useCapture: true } );\n\t\tthis.listenTo( element, 'blur', () => this._blur(), { useCapture: true } );\n\t\tthis._elements.add( element );\n\t}\n\n\t/**\n\t * Stops tracking the specified element and stops listening on this element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tremove( element ) {\n\t\tif ( element === this.focusedElement ) {\n\t\t\tthis._blur( element );\n\t\t}\n\n\t\tif ( this._elements.has( element ) ) {\n\t\t\tthis.stopListening( element );\n\t\t\tthis._elements.delete( element );\n\t\t}\n\t}\n\n\t/**\n\t * Destroys the focus tracker by:\n\t * - Disabling all event listeners attached to tracked elements.\n\t * - Removing all tracked elements that were previously added.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Stores currently focused element and set {#isFocused} as `true`.\n\t *\n\t * @private\n\t * @param {HTMLElement} element Element which has been focused.\n\t */\n\t_focus( element ) {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis.focusedElement = element;\n\t\tthis.isFocused = true;\n\t}\n\n\t/**\n\t * Clears currently focused element and set {@link #isFocused} as `false`.\n\t * This method uses `setTimeout` to change order of fires `blur` and `focus` events.\n\t *\n\t * @private\n\t * @fires blur\n\t */\n\t_blur() {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis._nextEventLoopTimeout = setTimeout( () => {\n\t\t\tthis.focusedElement = null;\n\t\t\tthis.isFocused = false;\n\t\t}, 0 );\n\t}\n\n\t/**\n\t * @event focus\n\t */\n\n\t/**\n\t * @event blur\n\t */\n}\n\nmix( FocusTracker, DomEmitterMixin );\nmix( FocusTracker, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/editorui\n */\n\n/* globals console */\n\nimport ComponentFactory from '@ckeditor/ckeditor5-ui/src/componentfactory';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * A class providing the minimal interface that is required to successfully bootstrap any editor UI.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class EditorUI {\n\t/**\n\t * Creates an instance of the editor UI class.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor that the UI belongs to.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * An instance of the {@link module:ui/componentfactory~ComponentFactory}, a registry used by plugins\n\t\t * to register factories of specific UI components.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/componentfactory~ComponentFactory} #componentFactory\n\t\t */\n\t\tthis.componentFactory = new ComponentFactory( editor );\n\n\t\t/**\n\t\t * Stores the information about the editor UI focus and propagates it so various plugins and components\n\t\t * are unified as a focus group.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker} #focusTracker\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Stores all editable elements used by the editor instance.\n\t\t *\n\t\t * @private\n\t\t * @member {Map.<String,HTMLElement>}\n\t\t */\n\t\tthis._editableElementsMap = new Map();\n\n\t\t// Informs UI components that should be refreshed after layout change.\n\t\tthis.listenTo( editor.editing.view.document, 'layoutChanged', () => this.update() );\n\t}\n\n\t/**\n\t * The main (outermost) DOM element of the editor UI.\n\t *\n\t * For example, in {@link module:editor-classic/classiceditor~ClassicEditor} it is a `<div>` which\n\t * wraps the editable element and the toolbar. In {@link module:editor-inline/inlineeditor~InlineEditor}\n\t * it is the editable element itself (as there is no other wrapper). However, in\n\t * {@link module:editor-decoupled/decouplededitor~DecoupledEditor} it is set to `null` because this editor does not\n\t * come with a single \"main\" HTML element (its editable element and toolbar are separate).\n\t *\n\t * This property can be understood as a shorthand for retrieving the element that a specific editor integration\n\t * considers to be its main DOM element.\n\t *\n\t * @readonly\n\t * @member {HTMLElement|null} #element\n\t */\n\tget element() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Fires the {@link module:core/editor/editorui~EditorUI#event:update `update`} event.\n\t *\n\t * This method should be called when the editor UI (e.g. positions of its balloons) needs to be updated due to\n\t * some environmental change which CKEditor 5 is not aware of (e.g. resize of a container in which it is used).\n\t */\n\tupdate() {\n\t\tthis.fire( 'update' );\n\t}\n\n\t/**\n\t * Destroys the UI.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\n\t\tthis.focusTracker.destroy();\n\n\t\t// Clean–up the references to the CKEditor instance stored in the native editable DOM elements.\n\t\tfor ( const domElement of this._editableElementsMap.values() ) {\n\t\t\tdomElement.ckeditorInstance = null;\n\t\t}\n\n\t\tthis._editableElementsMap = new Map();\n\t}\n\n\t/**\n\t * Store the native DOM editable element used by the editor under\n\t * a unique name.\n\t *\n\t * @param {String} rootName The unique name of the editable element.\n\t * @param {HTMLElement} domElement The native DOM editable element.\n\t */\n\tsetEditableElement( rootName, domElement ) {\n\t\tthis._editableElementsMap.set( rootName, domElement );\n\n\t\t// Put a reference to the CKEditor instance in the editable native DOM element.\n\t\t// It helps 3rd–party software (browser extensions, other libraries) access and recognize\n\t\t// CKEditor 5 instances (editing roots) and use their API (there is no global editor\n\t\t// instance registry).\n\t\tif ( !domElement.ckeditorInstance ) {\n\t\t\tdomElement.ckeditorInstance = this.editor;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the editable editor element with the given name or null if editable does not exist.\n\t *\n\t * @param {String} [rootName=main] The editable name.\n\t * @returns {HTMLElement|undefined}\n\t */\n\tgetEditableElement( rootName = 'main' ) {\n\t\treturn this._editableElementsMap.get( rootName );\n\t}\n\n\t/**\n\t * Returns array of names of all editor editable elements.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetEditableElementsNames() {\n\t\treturn this._editableElementsMap.keys();\n\t}\n\n\t/**\n\t * Stores all editable elements used by the editor instance.\n\t *\n\t * @protected\n\t * @deprecated\n\t * @member {Map.<String,HTMLElement>}\n\t */\n\tget _editableElements() {\n\t\t/**\n\t\t * The {@link module:core/editor/editorui~EditorUI#_editableElements `EditorUI#_editableElements`} property has been\n\t\t * deprecated and will be removed in the near future. Please use {@link #setEditableElement `setEditableElement()`} and\n\t\t * {@link #getEditableElement `getEditableElement()`} methods instead.\n\t\t *\n\t\t * @error editor-ui-deprecated-editable-elements\n\t\t * @param {module:core/editor/editorui~EditorUI} editorUI Editor UI instance the deprecated property belongs to.\n\t\t */\n\t\tconsole.warn(\n\t\t\t'editor-ui-deprecated-editable-elements: ' +\n\t\t\t'The EditorUI#_editableElements property has been deprecated and will be removed in the near future.',\n\t\t\t{ editorUI: this } );\n\n\t\treturn this._editableElementsMap;\n\t}\n\n\t/**\n\t * Fired when the editor UI is ready.\n\t *\n\t * Fired before {@link module:engine/controller/datacontroller~DataController#event:ready}.\n\t *\n\t * @event ready\n\t */\n\n\t/**\n\t * Fired whenever the UI (all related components) should be refreshed.\n\t *\n\t * **Note:**: The event is fired after each {@link module:engine/view/document~Document#event:layoutChanged}.\n\t * It can also be fired manually via the {@link module:core/editor/editorui~EditorUI#update} method.\n\t *\n\t * @event update\n\t */\n}\n\nmix( EditorUI, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/placeholder\n */\n\nimport '../../theme/placeholder.css';\n\n// Each document stores information about its placeholder elements and check functions.\nconst documentPlaceholders = new WeakMap();\n\n/**\n * A helper that enables a placeholder on the provided view element (also updates its visibility).\n * The placeholder is a CSS pseudo–element (with a text content) attached to the element.\n *\n * To change the placeholder text, simply call this method again with new options.\n *\n * To disable the placeholder, use {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} helper.\n *\n * @param {Object} [options] Configuration options of the placeholder.\n * @param {module:engine/view/view~View} options.view Editing view instance.\n * @param {module:engine/view/element~Element} options.element Element that will gain a placeholder.\n * See `options.isDirectHost` to learn more.\n * @param {String} options.text Placeholder text.\n * @param {Boolean} [options.isDirectHost=true] If set `false`, the placeholder will not be enabled directly\n * in the passed `element` but in one of its children (selected automatically, i.e. a first empty child element).\n * Useful when attaching placeholders to elements that can host other elements (not just text), for instance,\n * editable root elements.\n */\nexport function enablePlaceholder( options ) {\n\tconst { view, element, text, isDirectHost = true } = options;\n\tconst doc = view.document;\n\n\t// Use a single a single post fixer per—document to update all placeholders.\n\tif ( !documentPlaceholders.has( doc ) ) {\n\t\tdocumentPlaceholders.set( doc, new Map() );\n\n\t\t// If a post-fixer callback makes a change, it should return `true` so other post–fixers\n\t\t// can re–evaluate the document again.\n\t\tdoc.registerPostFixer( writer => updateDocumentPlaceholders( doc, writer ) );\n\t}\n\n\t// Store information about the element placeholder under its document.\n\tdocumentPlaceholders.get( doc ).set( element, {\n\t\ttext,\n\t\tisDirectHost\n\t} );\n\n\t// Update the placeholders right away.\n\tview.change( writer => updateDocumentPlaceholders( doc, writer ) );\n}\n\n/**\n * Disables the placeholder functionality from a given element.\n *\n * See {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} to learn more.\n *\n * @param {module:engine/view/view~View} view\n * @param {module:engine/view/element~Element} element\n */\nexport function disablePlaceholder( view, element ) {\n\tconst doc = element.document;\n\n\tview.change( writer => {\n\t\tif ( !documentPlaceholders.has( doc ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst placeholders = documentPlaceholders.get( doc );\n\t\tconst config = placeholders.get( element );\n\n\t\twriter.removeAttribute( 'data-placeholder', config.hostElement );\n\t\thidePlaceholder( writer, config.hostElement );\n\n\t\tplaceholders.delete( element );\n\t} );\n}\n\n/**\n * Shows a placeholder in the provided element by changing related attributes and CSS classes.\n *\n * **Note**: This helper will not update the placeholder visibility nor manage the\n * it in any way in the future. What it does is a one–time state change of an element. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} and\n * {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} for full\n * placeholder functionality.\n *\n * **Note**: This helper will blindly show the placeholder directly in the root editable element if\n * one is passed, which could result in a visual clash if the editable element has some children\n * (for instance, an empty paragraph). Use {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`}\n * in that case or make sure the correct element is passed to the helper.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean} `true`, if any changes were made to the `element`.\n */\nexport function showPlaceholder( writer, element ) {\n\tif ( !element.hasClass( 'ck-placeholder' ) ) {\n\t\twriter.addClass( 'ck-placeholder', element );\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n/**\n * Hides a placeholder in the element by changing related attributes and CSS classes.\n *\n * **Note**: This helper will not update the placeholder visibility nor manage the\n * it in any way in the future. What it does is a one–time state change of an element. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} and\n * {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} for full\n * placeholder functionality.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean} `true`, if any changes were made to the `element`.\n */\nexport function hidePlaceholder( writer, element ) {\n\tif ( element.hasClass( 'ck-placeholder' ) ) {\n\t\twriter.removeClass( 'ck-placeholder', element );\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n/**\n * Checks if a placeholder should be displayed in the element.\n *\n * **Note**: This helper will blindly check the possibility of showing a placeholder directly in the\n * root editable element if one is passed, which may not be the expected result. If an element can\n * host other elements (not just text), most likely one of its children should be checked instead\n * because it will be the final host for the placeholder. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} in that case or make\n * sure the correct element is passed to the helper.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean}\n */\nexport function needsPlaceholder( element ) {\n\tconst doc = element.document;\n\n\t// The element was removed from document.\n\tif ( !doc ) {\n\t\treturn false;\n\t}\n\n\t// The element is empty only as long as it contains nothing but uiElements.\n\tconst isEmptyish = !Array.from( element.getChildren() )\n\t\t.some( element => !element.is( 'uiElement' ) );\n\n\t// If the element is empty and the document is blurred.\n\tif ( !doc.isFocused && isEmptyish ) {\n\t\treturn true;\n\t}\n\n\tconst viewSelection = doc.selection;\n\tconst selectionAnchor = viewSelection.anchor;\n\n\t// If document is focused and the element is empty but the selection is not anchored inside it.\n\tif ( isEmptyish && selectionAnchor && selectionAnchor.parent !== element ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Updates all placeholders associated with a document in a post–fixer callback.\n//\n// @private\n// @param { module:engine/view/document~Document} doc\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {Boolean} True if any changes were made to the view document.\nfunction updateDocumentPlaceholders( doc, writer ) {\n\tconst placeholders = documentPlaceholders.get( doc );\n\tlet wasViewModified = false;\n\n\tfor ( const [ element, config ] of placeholders ) {\n\t\tif ( updatePlaceholder( writer, element, config ) ) {\n\t\t\twasViewModified = true;\n\t\t}\n\t}\n\n\treturn wasViewModified;\n}\n\n// Updates a single placeholder in a post–fixer callback.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:engine/view/element~Element} element\n// @param {Object} config Configuration of the placeholder\n// @param {String} config.text\n// @param {Boolean} config.isDirectHost\n// @returns {Boolean} True if any changes were made to the view document.\nfunction updatePlaceholder( writer, element, config ) {\n\tconst { text, isDirectHost } = config;\n\tconst hostElement = isDirectHost ? element : getChildPlaceholderHostSubstitute( element );\n\tlet wasViewModified = false;\n\n\t// When not a direct host, it could happen that there is no child element\n\t// capable of displaying a placeholder.\n\tif ( !hostElement ) {\n\t\treturn false;\n\t}\n\n\t// Cache the host element. It will be necessary for disablePlaceholder() to know\n\t// which element should have class and attribute removed because, depending on\n\t// the config.isDirectHost value, it could be the element or one of its descendants.\n\tconfig.hostElement = hostElement;\n\n\t// This may be necessary when updating the placeholder text to something else.\n\tif ( hostElement.getAttribute( 'data-placeholder' ) !== text ) {\n\t\twriter.setAttribute( 'data-placeholder', text, hostElement );\n\t\twasViewModified = true;\n\t}\n\n\tif ( needsPlaceholder( hostElement ) ) {\n\t\tif ( showPlaceholder( writer, hostElement ) ) {\n\t\t\twasViewModified = true;\n\t\t}\n\t} else if ( hidePlaceholder( writer, hostElement ) ) {\n\t\twasViewModified = true;\n\t}\n\n\treturn wasViewModified;\n}\n\n// Gets a child element capable of displaying a placeholder if a parent element can host more\n// than just text (for instance, when it is a root editable element). The child element\n// can then be used in other placeholder helpers as a substitute of its parent.\n//\n// @private\n// @param {module:engine/view/element~Element} parent\n// @returns {module:engine/view/element~Element|null}\nfunction getChildPlaceholderHostSubstitute( parent ) {\n\tif ( parent.childCount === 1 ) {\n\t\tconst firstChild = parent.getChild( 0 );\n\n\t\tif ( firstChild.is( 'element' ) && !firstChild.is( 'uiElement' ) ) {\n\t\t\treturn firstChild;\n\t\t}\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/elementreplacer\n */\n\n/**\n * Utility class allowing to hide existing HTML elements or replace them with given ones in a way that doesn't remove\n * the original elements from the DOM.\n */\nexport default class ElementReplacer {\n\tconstructor() {\n\t\t/**\n\t\t * The elements replaced by {@link #replace} and their replacements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<Object>}\n\t\t */\n\t\tthis._replacedElements = [];\n\t}\n\n\t/**\n\t * Hides the `element` and, if specified, inserts the the given element next to it.\n\t *\n\t * The effect of this method can be reverted by {@link #restore}.\n\t *\n\t * @param {HTMLElement} element The element to replace.\n\t * @param {HTMLElement} [newElement] The replacement element. If not passed, then the `element` will just be hidden.\n\t */\n\treplace( element, newElement ) {\n\t\tthis._replacedElements.push( { element, newElement } );\n\n\t\telement.style.display = 'none';\n\n\t\tif ( newElement ) {\n\t\t\telement.parentNode.insertBefore( newElement, element.nextSibling );\n\t\t}\n\t}\n\n\t/**\n\t * Restores what {@link #replace} did.\n\t */\n\trestore() {\n\t\tthis._replacedElements.forEach( ( { element, newElement } ) => {\n\t\t\telement.style.display = '';\n\n\t\t\tif ( newElement ) {\n\t\t\t\tnewElement.remove();\n\t\t\t}\n\t\t} );\n\n\t\tthis._replacedElements = [];\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditorui\n */\n\nimport EditorUI from '@ckeditor/ckeditor5-core/src/editor/editorui';\nimport enableToolbarKeyboardFocus from '@ckeditor/ckeditor5-ui/src/toolbar/enabletoolbarkeyboardfocus';\nimport normalizeToolbarConfig from '@ckeditor/ckeditor5-ui/src/toolbar/normalizetoolbarconfig';\nimport { enablePlaceholder } from '@ckeditor/ckeditor5-engine/src/view/placeholder';\nimport ElementReplacer from '@ckeditor/ckeditor5-utils/src/elementreplacer';\n\n/**\n * The classic editor UI class.\n *\n * @extends module:core/editor/editorui~EditorUI\n */\nexport default class ClassicEditorUI extends EditorUI {\n\t/**\n\t * Creates an instance of the classic editor UI class.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {module:ui/editorui/editoruiview~EditorUIView} view The view of the UI.\n\t */\n\tconstructor( editor, view ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The main (top–most) view of the editor UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/editorui/editoruiview~EditorUIView} #view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * A normalized `config.toolbar` object.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._toolbarConfig = normalizeToolbarConfig( editor.config.get( 'toolbar' ) );\n\n\t\t/**\n\t\t * The element replacer instance used to hide the editor's source element.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/elementreplacer~ElementReplacer}\n\t\t */\n\t\tthis._elementReplacer = new ElementReplacer();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget element() {\n\t\treturn this.view.element;\n\t}\n\n\t/**\n\t * Initializes the UI.\n\t *\n\t * @param {HTMLElement|null} replacementElement The DOM element that will be the source for the created editor.\n\t */\n\tinit( replacementElement ) {\n\t\tconst editor = this.editor;\n\t\tconst view = this.view;\n\t\tconst editingView = editor.editing.view;\n\t\tconst editable = view.editable;\n\t\tconst editingRoot = editingView.document.getRoot();\n\n\t\t// The editable UI and editing root should share the same name. Then name is used\n\t\t// to recognize the particular editable, for instance in ARIA attributes.\n\t\teditable.name = editingRoot.rootName;\n\n\t\tview.render();\n\n\t\t// The editable UI element in DOM is available for sure only after the editor UI view has been rendered.\n\t\t// But it can be available earlier if a DOM element has been passed to BalloonEditor.create().\n\t\tconst editableElement = editable.element;\n\n\t\t// Register the editable UI view in the editor. A single editor instance can aggregate multiple\n\t\t// editable areas (roots) but the classic editor has only one.\n\t\tthis.setEditableElement( editable.name, editableElement );\n\n\t\t// Let the global focus tracker know that the editable UI element is focusable and\n\t\t// belongs to the editor. From now on, the focus tracker will sustain the editor focus\n\t\t// as long as the editable is focused (e.g. the user is typing).\n\t\tthis.focusTracker.add( editableElement );\n\n\t\t// Let the editable UI element respond to the changes in the global editor focus\n\t\t// tracker. It has been added to the same tracker a few lines above but, in reality, there are\n\t\t// many focusable areas in the editor, like balloons, toolbars or dropdowns and as long\n\t\t// as they have focus, the editable should act like it is focused too (although technically\n\t\t// it isn't), e.g. by setting the proper CSS class, visually announcing focus to the user.\n\t\t// Doing otherwise will result in editable focus styles disappearing, once e.g. the\n\t\t// toolbar gets focused.\n\t\tview.editable.bind( 'isFocused' ).to( this.focusTracker );\n\n\t\t// Bind the editable UI element to the editing view, making it an end– and entry–point\n\t\t// of the editor's engine. This is where the engine meets the UI.\n\t\teditingView.attachDomRoot( editableElement );\n\n\t\t// If an element containing the initial data of the editor was provided, replace it with\n\t\t// an editor instance's UI in DOM until the editor is destroyed. For instance, a <textarea>\n\t\t// can be such element.\n\t\tif ( replacementElement ) {\n\t\t\tthis._elementReplacer.replace( replacementElement, this.element );\n\t\t}\n\n\t\tthis._initPlaceholder();\n\t\tthis._initToolbar();\n\t\tthis.fire( 'ready' );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tconst view = this.view;\n\t\tconst editingView = this.editor.editing.view;\n\n\t\tthis._elementReplacer.restore();\n\t\teditingView.detachDomRoot( view.editable.name );\n\t\tview.destroy();\n\n\t\tsuper.destroy();\n\t}\n\n\t/**\n\t * Initializes the editor toolbar.\n\t *\n\t * @private\n\t */\n\t_initToolbar() {\n\t\tconst editor = this.editor;\n\t\tconst view = this.view;\n\t\tconst editingView = editor.editing.view;\n\n\t\t// Set–up the sticky panel with toolbar.\n\t\tview.stickyPanel.bind( 'isActive' ).to( this.focusTracker, 'isFocused' );\n\t\tview.stickyPanel.limiterElement = view.element;\n\n\t\tif ( this._toolbarConfig.viewportTopOffset ) {\n\t\t\tview.stickyPanel.viewportTopOffset = this._toolbarConfig.viewportTopOffset;\n\t\t}\n\n\t\tview.toolbar.fillFromConfig( this._toolbarConfig.items, this.componentFactory );\n\n\t\tenableToolbarKeyboardFocus( {\n\t\t\torigin: editingView,\n\t\t\toriginFocusTracker: this.focusTracker,\n\t\t\toriginKeystrokeHandler: editor.keystrokes,\n\t\t\ttoolbar: view.toolbar\n\t\t} );\n\t}\n\n\t/**\n\t * Enable the placeholder text on the editing root, if any was configured.\n\t *\n\t * @private\n\t */\n\t_initPlaceholder() {\n\t\tconst editor = this.editor;\n\t\tconst editingView = editor.editing.view;\n\t\tconst editingRoot = editingView.document.getRoot();\n\t\tconst sourceElement = editor.sourceElement;\n\n\t\tconst placeholderText = editor.config.get( 'placeholder' ) ||\n\t\t\tsourceElement && sourceElement.tagName.toLowerCase() === 'textarea' && sourceElement.getAttribute( 'placeholder' );\n\n\t\tif ( placeholderText ) {\n\t\t\tenablePlaceholder( {\n\t\t\t\tview: editingView,\n\t\t\t\telement: editingRoot,\n\t\t\t\ttext: placeholderText,\n\t\t\t\tisDirectHost: false\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/normalizetoolbarconfig\n */\n\n/**\n * Normalizes the toolbar configuration (`config.toolbar`), which:\n *\n * * may be defined as an `Array`:\n *\n * \t\ttoolbar: [ 'heading', 'bold', 'italic', 'link', ... ]\n *\n * * or an `Object`:\n *\n *\t\ttoolbar: {\n *\t\t\titems: [ 'heading', 'bold', 'italic', 'link', ... ],\n *\t\t\t...\n *\t\t}\n *\n * * or may not be defined at all (`undefined`)\n *\n * and returns it in the object form.\n *\n * @param {Array|Object|undefined} config The value of `config.toolbar`.\n * @returns {Object} A normalized toolbar config object.\n */\nexport default function normalizeToolbarConfig( config ) {\n\tif ( Array.isArray( config ) ) {\n\t\treturn {\n\t\t\titems: config\n\t\t};\n\t}\n\n\tif ( !config ) {\n\t\treturn {\n\t\t\titems: []\n\t\t};\n\t}\n\n\treturn Object.assign( {\n\t\titems: []\n\t}, config );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/enabletoolbarkeyboardfocus\n */\n\n/**\n * Enables focus/blur toolbar navigation using `Alt+F10` and `Esc` keystrokes.\n *\n * @param {Object} options Options of the utility.\n * @param {*} options.origin A view to which the focus will return when `Esc` is pressed and\n * `options.toolbar` is focused.\n * @param {module:utils/keystrokehandler~KeystrokeHandler} options.originKeystrokeHandler A keystroke\n * handler to register `Alt+F10` keystroke.\n * @param {module:utils/focustracker~FocusTracker} options.originFocusTracker A focus tracker\n * for `options.origin`.\n * @param {module:ui/toolbar/toolbarview~ToolbarView} options.toolbar A toolbar which is to gain\n * focus when `Alt+F10` is pressed.\n * @param {Function} [options.beforeFocus] A callback executed before the `options.toolbar` gains focus\n * upon the `Alt+F10` keystroke.\n * @param {Function} [options.afterBlur] A callback executed after `options.toolbar` loses focus upon\n * `Esc` keystroke but before the focus goes back to `options.origin`.\n */\nexport default function enableToolbarKeyboardFocus( {\n\torigin,\n\toriginKeystrokeHandler,\n\toriginFocusTracker,\n\ttoolbar,\n\tbeforeFocus,\n\tafterBlur\n} ) {\n\t// Because toolbar items can get focus, the overall state of the toolbar must\n\t// also be tracked.\n\toriginFocusTracker.add( toolbar.element );\n\n\t// Focus the toolbar on the keystroke, if not already focused.\n\toriginKeystrokeHandler.set( 'Alt+F10', ( data, cancel ) => {\n\t\tif ( originFocusTracker.isFocused && !toolbar.focusTracker.isFocused ) {\n\t\t\tif ( beforeFocus ) {\n\t\t\t\tbeforeFocus();\n\t\t\t}\n\n\t\t\ttoolbar.focus();\n\n\t\t\tcancel();\n\t\t}\n\t} );\n\n\t// Blur the toolbar and bring the focus back to origin.\n\ttoolbar.keystrokes.set( 'Esc', ( data, cancel ) => {\n\t\tif ( toolbar.focusTracker.isFocused ) {\n\t\t\torigin.focus();\n\n\t\t\tif ( afterBlur ) {\n\t\t\t\tafterBlur();\n\t\t\t}\n\n\t\t\tcancel();\n\t\t}\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/viewcollection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\n\n/**\n * Collects {@link module:ui/view~View} instances.\n *\n *\t\tconst parentView = new ParentView( locale );\n *\t\tconst collection = new ViewCollection( locale );\n *\n *\t\tcollection.setParent( parentView.element );\n *\n *\t\tconst viewA = new ChildView( locale );\n *\t\tconst viewB = new ChildView( locale );\n *\n * View collection renders and manages view {@link module:ui/view~View#element elements}:\n *\n *\t\tcollection.add( viewA );\n *\t\tcollection.add( viewB );\n *\n *\t\tconsole.log( parentView.element.firsChild ); // -> viewA.element\n *\t\tconsole.log( parentView.element.lastChild ); // -> viewB.element\n *\n * It {@link module:ui/viewcollection~ViewCollection#delegate propagates} DOM events too:\n *\n *\t\t// Delegate #click and #keydown events from viewA and viewB to the parentView.\n *\t\tcollection.delegate( 'click' ).to( parentView );\n *\n *\t\tparentView.on( 'click', ( evt ) => {\n *\t\t\tconsole.log( `${ evt.source } has been clicked.` );\n *\t\t} );\n *\n *\t\t// This event will be delegated to the parentView.\n *\t\tviewB.fire( 'click' );\n *\n * **Note**: A view collection can be used directly in the {@link module:ui/template~TemplateDefinition definition}\n * of a {@link module:ui/template~Template template}.\n *\n * @extends module:utils/collection~Collection\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class ViewCollection extends Collection {\n\t/**\n\t * Creates a new instance of the {@link module:ui/viewcollection~ViewCollection}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The {@link module:core/editor/editor~Editor editor's locale} instance.\n\t */\n\tconstructor( locale ) {\n\t\tsuper( {\n\t\t\t// An #id Number attribute should be legal and not break the `ViewCollection` instance.\n\t\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/93\n\t\t\tidProperty: 'viewUid'\n\t\t} );\n\n\t\t// Handle {@link module:ui/view~View#element} in DOM when a new view is added to the collection.\n\t\tthis.on( 'add', ( evt, view, index ) => {\n\t\t\tif ( !view.isRendered ) {\n\t\t\t\tview.render();\n\t\t\t}\n\n\t\t\tif ( view.element && this._parentElement ) {\n\t\t\t\tthis._parentElement.insertBefore( view.element, this._parentElement.children[ index ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Handle {@link module:ui/view~View#element} in DOM when a view is removed from the collection.\n\t\tthis.on( 'remove', ( evt, view ) => {\n\t\t\tif ( view.element && this._parentElement ) {\n\t\t\t\tview.element.remove();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * The {@link module:core/editor/editor~Editor#locale editor's locale} instance.\n\t\t * See the view {@link module:ui/view~View#locale locale} property.\n\t\t *\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * A parent element within which child views are rendered and managed in DOM.\n\t\t *\n\t\t * @protected\n\t\t * @member {HTMLElement}\n\t\t */\n\t\tthis._parentElement = null;\n\t}\n\n\t/**\n\t * Destroys the view collection along with child views.\n\t * See the view {@link module:ui/view~View#destroy} method.\n\t */\n\tdestroy() {\n\t\tthis.map( view => view.destroy() );\n\t}\n\n\t/**\n\t * Sets the parent HTML element of this collection. When parent is set, {@link #add adding} and\n\t * {@link #remove removing} views in the collection synchronizes their\n\t * {@link module:ui/view~View#element elements} in the parent element.\n\t *\n\t * @param {HTMLElement} element A new parent element.\n\t */\n\tsetParent( elementOrDocFragment ) {\n\t\tthis._parentElement = elementOrDocFragment;\n\t}\n\n\t/**\n\t * Delegates selected events coming from within views in the collection to any\n\t * {@link module:utils/emittermixin~Emitter}.\n\t *\n\t * For the following views and collection:\n\t *\n\t *\t\tconst viewA = new View();\n\t *\t\tconst viewB = new View();\n\t *\t\tconst viewC = new View();\n\t *\n\t *\t\tconst views = parentView.createCollection();\n\t *\n\t *\t\tviews.delegate( 'eventX' ).to( viewB );\n\t *\t\tviews.delegate( 'eventX', 'eventY' ).to( viewC );\n\t *\n\t *\t\tviews.add( viewA );\n\t *\n\t * the `eventX` is delegated (fired by) `viewB` and `viewC` along with `customData`:\n\t *\n\t *\t\tviewA.fire( 'eventX', customData );\n\t *\n\t * and `eventY` is delegated (fired by) `viewC` along with `customData`:\n\t *\n\t *\t\tviewA.fire( 'eventY', customData );\n\t *\n\t * See {@link module:utils/emittermixin~Emitter#delegate}.\n\t *\n\t * @param {...String} events {@link module:ui/view~View} event names to be delegated to another\n\t * {@link module:utils/emittermixin~Emitter}.\n\t * @returns {Object}\n\t * @returns {Function} return.to A function which accepts the destination of\n\t * {@link module:utils/emittermixin~Emitter#delegate delegated} events.\n\t */\n\tdelegate( ...events ) {\n\t\tif ( !events.length || !isStringArray( events ) ) {\n\t\t\t/**\n\t\t\t * All event names must be strings.\n\t\t\t *\n\t\t\t * @error ui-viewcollection-delegate-wrong-events\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-viewcollection-delegate-wrong-events: All event names must be strings.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\treturn {\n\t\t\t/**\n\t\t\t * Selects destination for {@link module:utils/emittermixin~Emitter#delegate} events.\n\t\t\t *\n\t\t\t * @memberOf module:ui/viewcollection~ViewCollection#delegate\n\t\t\t * @function module:ui/viewcollection~ViewCollection#delegate.to\n\t\t\t * @param {module:utils/emittermixin~Emitter} dest An `Emitter` instance which is\n\t\t\t * the destination for delegated events.\n\t\t\t */\n\t\t\tto: dest => {\n\t\t\t\t// Activate delegating on existing views in this collection.\n\t\t\t\tfor ( const view of this ) {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.delegate( evtName ).to( dest );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Activate delegating on future views in this collection.\n\t\t\t\tthis.on( 'add', ( evt, view ) => {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.delegate( evtName ).to( dest );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t\t// Deactivate delegating when view is removed from this collection.\n\t\t\t\tthis.on( 'remove', ( evt, view ) => {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.stopDelegating( evtName, dest );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Removes a child view from the collection. If the {@link #setParent parent element} of the\n\t * collection has been set, the {@link module:ui/view~View#element element} of the view is also removed\n\t * in DOM, reflecting the order of the collection.\n\t *\n\t * See the {@link #add} method.\n\t *\n\t * @method #remove\n\t * @param {module:ui/view~View|Number|String} subject The view to remove, its id or index in the collection.\n\t * @returns {Object} The removed view.\n\t */\n}\n\n// Check if all entries of the array are of `String` type.\n//\n// @private\n// @param {Array} arr An array to be checked.\n// @returns {Boolean}\nfunction isStringArray( arr ) {\n\treturn arr.every( a => typeof a == 'string' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/template\n */\n\n/* global document */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport View from './view';\nimport ViewCollection from './viewcollection';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport { isObject, cloneDeepWith } from 'lodash-es';\n\nconst xhtmlNs = 'http://www.w3.org/1999/xhtml';\n\n/**\n * A basic Template class. It renders a DOM HTML element or text from a\n * {@link module:ui/template~TemplateDefinition definition} and supports element attributes, children,\n * bindings to {@link module:utils/observablemixin~Observable observables} and DOM event propagation.\n *\n * A simple template can look like this:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\tclass: 'foo',\n *\t\t\t\tstyle: {\n *\t\t\t\t\tbackgroundColor: 'yellow'\n *\t\t\t\t}\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t'A paragraph.'\n *\t\t\t]\n *\t\t} ).render();\n *\n * and it will render the following HTML element:\n *\n *\t\t<p class=\"foo\" style=\"background-color: yellow;\">A paragraph.</p>\n *\n * Additionally, the `observable` will always fire `clicked` upon clicking `<p>` in the DOM.\n *\n * See {@link module:ui/template~TemplateDefinition} to know more about templates and complex\n * template definitions.\n *\n* @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Template {\n\t/**\n\t * Creates an instance of the {@link ~Template} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the template.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, normalize( clone( def ) ) );\n\n\t\t/**\n\t\t * Indicates whether this particular Template instance has been\n\t\t * {@link #render rendered}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._isRendered = false;\n\n\t\t/**\n\t\t * The tag (`tagName`) of this template, e.g. `div`. It also indicates that the template\n\t\t * renders to an HTML element.\n\t\t *\n\t\t * @member {String} #tag\n\t\t */\n\n\t\t/**\n\t\t * The text of the template. It also indicates that the template renders to a DOM text node.\n\t\t *\n\t\t * @member {Array.<String|module:ui/template~TemplateValueSchema>} #text\n\t\t */\n\n\t\t/**\n\t\t * The attributes of the template, e.g. `{ id: [ 'ck-id' ] }`, corresponding with\n\t\t * the attributes of an HTML element.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {Object} #attributes\n\t\t */\n\n\t\t/**\n\t\t * The children of the template. They can be either:\n\t\t * * independent instances of {@link ~Template} (sub–templates),\n\t\t * * native DOM Nodes.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {Array.<module:ui/template~Template|Node>} #children\n\t\t */\n\n\t\t/**\n\t\t * The DOM event listeners of the template.\n\t\t *\n\t\t * @member {Object} #eventListeners\n\t\t */\n\n\t\t/**\n\t\t * The data used by the {@link #revert} method to restore a node to its original state.\n\t\t *\n\t\t * See: {@link #apply}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/template~RenderData}\n\t\t */\n\t\tthis._revertData = null;\n\t}\n\n\t/**\n\t * Renders a DOM Node (an HTML element or text) out of the template.\n\t *\n\t *\t\tconst domNode = new Template( { ... } ).render();\n\t *\n\t * See: {@link #apply}.\n\t *\n\t * @returns {HTMLElement|Text}\n\t */\n\trender() {\n\t\tconst node = this._renderNode( {\n\t\t\tintoFragment: true\n\t\t} );\n\n\t\tthis._isRendered = true;\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Applies the template to an existing DOM Node, either HTML element or text.\n\t *\n\t * **Note:** No new DOM nodes will be created. Applying extends:\n\t *\n\t * {@link module:ui/template~TemplateDefinition attributes},\n\t * {@link module:ui/template~TemplateDefinition event listeners}, and\n\t * `textContent` of {@link module:ui/template~TemplateDefinition children} only.\n\t *\n\t * **Note:** Existing `class` and `style` attributes are extended when a template\n\t * is applied to an HTML element, while other attributes and `textContent` are overridden.\n\t *\n\t * **Note:** The process of applying a template can be easily reverted using the\n\t * {@link module:ui/template~Template#revert} method.\n\t *\n\t *\t\tconst element = document.createElement( 'div' );\n\t *\t\tconst observable = new Model( { divClass: 'my-div' } );\n\t *\t\tconst emitter = Object.create( EmitterMixin );\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tid: 'first-div',\n\t *\t\t\t\tclass: bind.to( 'divClass' )\n\t *\t\t\t},\n\t *\t\t\ton: {\n\t *\t\t\t\tclick: bind( 'elementClicked' ) // Will be fired by the observable.\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t'Div text.'\n\t *\t\t\t]\n\t *\t\t} ).apply( element );\n\t *\n\t *\t\tconsole.log( element.outerHTML ); // -> '<div id=\"first-div\" class=\"my-div\"></div>'\n\t *\n\t * @see module:ui/template~Template#render\n\t * @see module:ui/template~Template#revert\n\t * @param {Node} node Root node for the template to apply.\n\t */\n\tapply( node ) {\n\t\tthis._revertData = getEmptyRevertData();\n\n\t\tthis._renderNode( {\n\t\t\tnode,\n\t\t\tisApplying: true,\n\t\t\trevertData: this._revertData\n\t\t} );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Reverts a template {@link module:ui/template~Template#apply applied} to a DOM node.\n\t *\n\t * @param {Node} node The root node for the template to revert. In most of the cases, it is the\n\t * same node used by {@link module:ui/template~Template#apply}.\n\t */\n\trevert( node ) {\n\t\tif ( !this._revertData ) {\n\t\t\t/**\n\t\t\t * Attempting to revert a template which has not been applied yet.\n\t\t\t *\n\t\t\t * @error ui-template-revert-not-applied\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-revert-not-applied: Attempting to revert a template which has not been applied yet.',\n\t\t\t\t[ this, node ]\n\t\t\t);\n\t\t}\n\n\t\tthis._revertTemplateFromNode( node, this._revertData );\n\t}\n\n\t/**\n\t * Returns an iterator which traverses the template in search of {@link module:ui/view~View}\n\t * instances and returns them one by one.\n\t *\n\t *\t\tconst viewFoo = new View();\n\t *\t\tconst viewBar = new View();\n\t *\t\tconst viewBaz = new View();\n\t *\t\tconst template = new Template( {\n\t *\t\t\ttag: 'div',\n\t *\t\t\tchildren: [\n\t *\t\t\t\tviewFoo,\n\t *\t\t\t\t{\n\t *\t\t\t\t\ttag: 'div',\n\t *\t\t\t\t\tchildren: [\n\t *\t\t\t\t\t\tviewBar\n\t *\t\t\t\t\t]\n\t *\t\t\t\t},\n\t *\t\t\t\tviewBaz\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Logs: viewFoo, viewBar, viewBaz\n\t *\t\tfor ( const view of template.getViews() ) {\n\t *\t\t\tconsole.log( view );\n\t *\t\t}\n\t *\n\t * @returns {Iterable.<module:ui/view~View>}\n\t */\n\t* getViews() {\n\t\tfunction* search( def ) {\n\t\t\tif ( def.children ) {\n\t\t\t\tfor ( const child of def.children ) {\n\t\t\t\t\tif ( isView( child ) ) {\n\t\t\t\t\t\tyield child;\n\t\t\t\t\t} else if ( isTemplate( child ) ) {\n\t\t\t\t\t\tyield* search( child );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tyield* search( this );\n\t}\n\n\t/**\n\t * An entry point to the interface which binds DOM nodes to\n\t * {@link module:utils/observablemixin~Observable observables}.\n\t * There are two types of bindings:\n\t *\n\t * * HTML element attributes or text `textContent` synchronized with attributes of an\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}\n\t * and {@link module:ui/template~BindChain#if}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\t// Binds the element \"class\" attribute to observable#classAttribute.\n\t *\t\t\t\tclass: bind.to( 'classAttribute' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * * DOM events fired on HTML element propagated through\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\ton: {\n\t *\t\t\t\t// Will be fired by the observable.\n\t *\t\t\t\tclick: bind( 'elementClicked' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * Also see {@link module:ui/view~View#bindTemplate}.\n\t *\n\t * @param {module:utils/observablemixin~Observable} observable An observable which provides boundable attributes.\n\t * @param {module:utils/emittermixin~Emitter} emitter An emitter that listens to observable attribute\n\t * changes or DOM Events (depending on the kind of the binding). Usually, a {@link module:ui/view~View} instance.\n\t * @returns {module:ui/template~BindChain}\n\t */\n\tstatic bind( observable, emitter ) {\n\t\treturn {\n\t\t\tto( eventNameOrFunctionOrAttribute, callback ) {\n\t\t\t\treturn new TemplateToBinding( {\n\t\t\t\t\teventNameOrFunction: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tattribute: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tobservable, emitter, callback\n\t\t\t\t} );\n\t\t\t},\n\n\t\t\tif( attribute, valueIfTrue, callback ) {\n\t\t\t\treturn new TemplateIfBinding( {\n\t\t\t\t\tobservable, emitter, attribute, valueIfTrue, callback\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Extends an existing {@link module:ui/template~Template} instance with some additional content\n\t * from another {@link module:ui/template~TemplateDefinition}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tconst template = new Template( {\n\t *\t\t\ttag: 'p',\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'a',\n\t *\t\t\t\tdata-x: bind.to( 'foo' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\ttag: 'span',\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'b'\n\t *\t\t\t\t\t},\n\t *\t\t\t\t\tchildren: [\n\t *\t\t\t\t\t\t'Span'\n\t *\t\t\t\t\t]\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t } );\n\t *\n\t *\t\t// Instance-level extension.\n\t *\t\tTemplate.extend( template, {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'b',\n\t *\t\t\t\tdata-x: bind.to( 'bar' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'c'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Child extension.\n\t *\t\tTemplate.extend( template.children[ 0 ], {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'd'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * the `outerHTML` of `template.render()` is:\n\t *\n\t *\t\t<p class=\"a b\" data-x=\"{ observable.foo } { observable.bar }\">\n\t *\t\t\t<span class=\"b c d\">Span</span>\n\t *\t\t</p>\n\t *\n\t * @param {module:ui/template~Template} template An existing template instance to be extended.\n\t * @param {module:ui/template~TemplateDefinition} def Additional definition to be applied to a template.\n\t */\n\tstatic extend( template, def ) {\n\t\tif ( template._isRendered ) {\n\t\t\t/**\n\t\t\t * Extending a template after rendering may not work as expected. To make sure\n\t\t\t * the {@link module:ui/template~Template.extend extending} works for an element,\n\t\t\t * make sure it happens before {@link #render} is called.\n\t\t\t *\n\t\t\t * @error template-extend-render\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'template-extend-render: Attempting to extend a template which has already been rendered.',\n\t\t\t\t[ this, template ]\n\t\t\t);\n\t\t}\n\n\t\textendTemplate( template, normalize( clone( def ) ) );\n\t}\n\n\t/**\n\t * Renders a DOM Node (either an HTML element or text) out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderNode( data ) {\n\t\tlet isInvalid;\n\n\t\tif ( data.node ) {\n\t\t\t// When applying, a definition cannot have \"tag\" and \"text\" at the same time.\n\t\t\tisInvalid = this.tag && this.text;\n\t\t} else {\n\t\t\t// When rendering, a definition must have either \"tag\" or \"text\": XOR( this.tag, this.text ).\n\t\t\tisInvalid = this.tag ? this.text : !this.text;\n\t\t}\n\n\t\tif ( isInvalid ) {\n\t\t\t/**\n\t\t\t * Node definition cannot have the \"tag\" and \"text\" properties at the same time.\n\t\t\t * Node definition must have either \"tag\" or \"text\" when rendering a new Node.\n\t\t\t *\n\t\t\t * @error ui-template-wrong-syntax\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-wrong-syntax: Node definition must have either \"tag\" or \"text\" when rendering a new Node.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tif ( this.text ) {\n\t\t\treturn this._renderText( data );\n\t\t} else {\n\t\t\treturn this._renderElement( data );\n\t\t}\n\t}\n\n\t/**\n\t * Renders an HTML element out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElement( data ) {\n\t\tlet node = data.node;\n\n\t\tif ( !node ) {\n\t\t\tnode = data.node = document.createElementNS( this.ns || xhtmlNs, this.tag );\n\t\t}\n\n\t\tthis._renderAttributes( data );\n\t\tthis._renderElementChildren( data );\n\t\tthis._setUpListeners( data );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders a text node out of {@link module:ui/template~Template#text}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderText( data ) {\n\t\tlet node = data.node;\n\n\t\t// Save the original textContent to revert it in #revert().\n\t\tif ( node ) {\n\t\t\tdata.revertData.text = node.textContent;\n\t\t} else {\n\t\t\tnode = data.node = document.createTextNode( '' );\n\t\t}\n\n\t\t// Check if this Text Node is bound to Observable. Cases:\n\t\t//\n\t\t//\t\ttext: [ Template.bind( ... ).to( ... ) ]\n\t\t//\n\t\t//\t\ttext: [\n\t\t//\t\t\t'foo',\n\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t//\t\t\t...\n\t\t//\t\t]\n\t\t//\n\t\tif ( hasTemplateBinding( this.text ) ) {\n\t\t\tthis._bindToObservable( {\n\t\t\t\tschema: this.text,\n\t\t\t\tupdater: getTextUpdater( node ),\n\t\t\t\tdata\n\t\t\t} );\n\t\t}\n\t\t// Simply set text. Cases:\n\t\t//\n\t\t//\t\ttext: [ 'all', 'are', 'static' ]\n\t\t//\n\t\t//\t\ttext: [ 'foo' ]\n\t\t//\n\t\telse {\n\t\t\tnode.textContent = this.text.join( '' );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders HTML element attributes out of {@link module:ui/template~Template#attributes}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderAttributes( data ) {\n\t\tlet attrName, attrValue, domAttrValue, attrNs;\n\n\t\tif ( !this.attributes ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst node = data.node;\n\t\tconst revertData = data.revertData;\n\n\t\tfor ( attrName in this.attributes ) {\n\t\t\t// Current attribute value in DOM.\n\t\t\tdomAttrValue = node.getAttribute( attrName );\n\n\t\t\t// The value to be set.\n\t\t\tattrValue = this.attributes[ attrName ];\n\n\t\t\t// Save revert data.\n\t\t\tif ( revertData ) {\n\t\t\t\trevertData.attributes[ attrName ] = domAttrValue;\n\t\t\t}\n\n\t\t\t// Detect custom namespace:\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tattrNs = ( isObject( attrValue[ 0 ] ) && attrValue[ 0 ].ns ) ? attrValue[ 0 ].ns : null;\n\n\t\t\t// Activate binding if one is found. Cases:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'bar',\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t\t//\t\t\t'baz'\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( attrValue ) ) {\n\t\t\t\t// Normalize attributes with additional data like namespace:\n\t\t\t\t//\n\t\t\t\t//\t\tclass: {\n\t\t\t\t//\t\t\tns: 'abc',\n\t\t\t\t//\t\t\tvalue: [ ... ]\n\t\t\t\t//\t\t}\n\t\t\t\t//\n\t\t\t\tconst valueToBind = attrNs ? attrValue[ 0 ].value : attrValue;\n\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && shouldExtend( attrName ) ) {\n\t\t\t\t\tvalueToBind.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: valueToBind,\n\t\t\t\t\tupdater: getAttributeUpdater( node, attrName, attrNs ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Style attribute could be an Object so it needs to be parsed in a specific way.\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\twidth: '100px',\n\t\t\t//\t\t\theight: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse if ( attrName == 'style' && typeof attrValue[ 0 ] !== 'string' ) {\n\t\t\t\tthis._renderStyleAttribute( attrValue[ 0 ], data );\n\t\t\t}\n\n\t\t\t// Otherwise simply set the static attribute:\n\t\t\t//\n\t\t\t//\t\tclass: [ 'foo' ]\n\t\t\t//\n\t\t\t//\t\tclass: [ 'all', 'are', 'static' ]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t{\n\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t//\t\t\t\tvalue: [ 'foo' ]\n\t\t\t//\t\t\t}\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\telse {\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && domAttrValue && shouldExtend( attrName ) ) {\n\t\t\t\t\tattrValue.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tattrValue = attrValue\n\t\t\t\t\t// Retrieve \"values\" from:\n\t\t\t\t\t//\n\t\t\t\t\t//\t\tclass: [\n\t\t\t\t\t//\t\t\t{\n\t\t\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t\t\t//\t\t\t\tvalue: [ ... ]\n\t\t\t\t\t//\t\t\t}\n\t\t\t\t\t//\t\t]\n\t\t\t\t\t//\n\t\t\t\t\t.map( val => val ? ( val.value || val ) : val )\n\t\t\t\t\t// Flatten the array.\n\t\t\t\t\t.reduce( ( prev, next ) => prev.concat( next ), [] )\n\t\t\t\t\t// Convert into string.\n\t\t\t\t\t.reduce( arrayValueReducer, '' );\n\n\t\t\t\tif ( !isFalsy( attrValue ) ) {\n\t\t\t\t\tnode.setAttributeNS( attrNs, attrName, attrValue );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders the `style` attribute of an HTML element based on\n\t * {@link module:ui/template~Template#attributes}.\n\t *\n\t * A style attribute is an {Object} with static values:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: 'red'\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * or values bound to {@link module:ui/model~Model} properties:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: bind.to( ... )\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * Note: The `style` attribute is rendered without setting the namespace. It does not seem to be\n\t * needed.\n\t *\n\t * @private\n\t * @param {Object} styles Styles located in `attributes.style` of {@link module:ui/template~TemplateDefinition}.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderStyleAttribute( styles, data ) {\n\t\tconst node = data.node;\n\n\t\tfor ( const styleName in styles ) {\n\t\t\tconst styleValue = styles[ styleName ];\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: bind.to( 'attribute' )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( styleValue ) ) {\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: [ styleValue ],\n\t\t\t\t\tupdater: getStyleUpdater( node, styleName ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: 'red'\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse {\n\t\t\t\tnode.style[ styleName ] = styleValue;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Recursively renders HTML element's children from {@link module:ui/template~Template#children}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElementChildren( data ) {\n\t\tconst node = data.node;\n\t\tconst container = data.intoFragment ? document.createDocumentFragment() : node;\n\t\tconst isApplying = data.isApplying;\n\t\tlet childIndex = 0;\n\n\t\tfor ( const child of this.children ) {\n\t\t\tif ( isViewCollection( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tchild.setParent( node );\n\n\t\t\t\t\t// Note: ViewCollection renders its children.\n\t\t\t\t\tfor ( const view of child ) {\n\t\t\t\t\t\tcontainer.appendChild( view.element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else if ( isView( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tif ( !child.isRendered ) {\n\t\t\t\t\t\tchild.render();\n\t\t\t\t\t}\n\n\t\t\t\t\tcontainer.appendChild( child.element );\n\t\t\t\t}\n\t\t\t} else if ( isNode( child ) ) {\n\t\t\t\tcontainer.appendChild( child );\n\t\t\t} else {\n\t\t\t\tif ( isApplying ) {\n\t\t\t\t\tconst revertData = data.revertData;\n\t\t\t\t\tconst childRevertData = getEmptyRevertData();\n\n\t\t\t\t\trevertData.children.push( childRevertData );\n\n\t\t\t\t\tchild._renderNode( {\n\t\t\t\t\t\tnode: container.childNodes[ childIndex++ ],\n\t\t\t\t\t\tisApplying: true,\n\t\t\t\t\t\trevertData: childRevertData\n\t\t\t\t\t} );\n\t\t\t\t} else {\n\t\t\t\t\tcontainer.appendChild( child.render() );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif ( data.intoFragment ) {\n\t\t\tnode.appendChild( container );\n\t\t}\n\t}\n\n\t/**\n\t * Activates `on` event listeners from the {@link module:ui/template~TemplateDefinition}\n\t * on an HTML element.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_setUpListeners( data ) {\n\t\tif ( !this.eventListeners ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const key in this.eventListeners ) {\n\t\t\tconst revertBindings = this.eventListeners[ key ].map( schemaItem => {\n\t\t\t\tconst [ domEvtName, domSelector ] = key.split( '@' );\n\n\t\t\t\treturn schemaItem.activateDomEventListener( domEvtName, domSelector, data );\n\t\t\t} );\n\n\t\t\tif ( data.revertData ) {\n\t\t\t\tdata.revertData.bindings.push( revertBindings );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * For a given {@link module:ui/template~TemplateValueSchema} containing {@link module:ui/template~TemplateBinding}\n\t * activates the binding and sets its initial value.\n\t *\n\t * Note: {@link module:ui/template~TemplateValueSchema} can be for HTML element attributes or\n\t * text node `textContent`.\n\t *\n\t * @protected\n\t * @param {Object} options Binding options.\n\t * @param {module:ui/template~TemplateValueSchema} options.schema\n\t * @param {Function} options.updater A function which updates the DOM (like attribute or text).\n\t * @param {module:ui/template~RenderData} options.data Rendering data.\n\t */\n\t_bindToObservable( { schema, updater, data } ) {\n\t\tconst revertData = data.revertData;\n\n\t\t// Set initial values.\n\t\tsyncValueSchemaValue( schema, updater, data );\n\n\t\tconst revertBindings = schema\n\t\t\t// Filter \"falsy\" (false, undefined, null, '') value schema components out.\n\t\t\t.filter( item => !isFalsy( item ) )\n\t\t\t// Filter inactive bindings from schema, like static strings ('foo'), numbers (42), etc.\n\t\t\t.filter( item => item.observable )\n\t\t\t// Once only the actual binding are left, let the emitter listen to observable change:attribute event.\n\t\t\t// TODO: Reduce the number of listeners attached as many bindings may listen\n\t\t\t// to the same observable attribute.\n\t\t\t.map( templateBinding => templateBinding.activateAttributeListener( schema, updater, data ) );\n\n\t\tif ( revertData ) {\n\t\t\trevertData.bindings.push( revertBindings );\n\t\t}\n\t}\n\n\t/**\n\t * Reverts {@link module:ui/template~RenderData#revertData template data} from a node to\n\t * return it to the original state.\n\t *\n\t * @protected\n\t * @param {HTMLElement|Text} node A node to be reverted.\n\t * @param {Object} revertData An object that stores information about what changes have been made by\n\t * {@link #apply} to the node. See {@link module:ui/template~RenderData#revertData} for more information.\n\t */\n\t_revertTemplateFromNode( node, revertData ) {\n\t\tfor ( const binding of revertData.bindings ) {\n\t\t\t// Each binding may consist of several observable+observable#attribute.\n\t\t\t// like the following has 2:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'x',\n\t\t\t//\t\t\tbind.to( 'foo' ),\n\t\t\t//\t\t\t'y',\n\t\t\t//\t\t\tbind.to( 'bar' )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\tfor ( const revertBinding of binding ) {\n\t\t\t\trevertBinding();\n\t\t\t}\n\t\t}\n\n\t\tif ( revertData.text ) {\n\t\t\tnode.textContent = revertData.text;\n\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const attrName in revertData.attributes ) {\n\t\t\tconst attrValue = revertData.attributes[ attrName ];\n\n\t\t\t// When the attribute has **not** been set before #apply().\n\t\t\tif ( attrValue === null ) {\n\t\t\t\tnode.removeAttribute( attrName );\n\t\t\t} else {\n\t\t\t\tnode.setAttribute( attrName, attrValue );\n\t\t\t}\n\t\t}\n\n\t\tfor ( let i = 0; i < revertData.children.length; ++i ) {\n\t\t\tthis._revertTemplateFromNode( node.childNodes[ i ], revertData.children[ i ] );\n\t\t}\n\t}\n}\n\nmix( Template, EmitterMixin );\n\n/**\n * Describes a binding created by the {@link module:ui/template~Template.bind} interface.\n *\n * @protected\n */\nexport class TemplateBinding {\n\t/**\n\t * Creates an instance of the {@link module:ui/template~TemplateBinding} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the binding.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, def );\n\n\t\t/**\n\t\t * An observable instance of the binding. It either:\n\t\t *\n\t\t * * provides the attribute with the value,\n\t\t * * or passes the event when a corresponding DOM event is fired.\n\t\t *\n\t\t * @member {module:utils/observablemixin~ObservableMixin} module:ui/template~TemplateBinding#observable\n\t\t */\n\n\t\t/**\n\t\t * An {@link module:utils/emittermixin~Emitter} used by the binding to:\n\t\t *\n\t\t * * listen to the attribute change in the {@link module:ui/template~TemplateBinding#observable},\n\t\t * * or listen to the event in the DOM.\n\t\t *\n\t\t * @member {module:utils/emittermixin~EmitterMixin} module:ui/template~TemplateBinding#emitter\n\t\t */\n\n\t\t/**\n\t\t * The name of the {@link module:ui/template~TemplateBinding#observable observed attribute}.\n\t\t *\n\t\t * @member {String} module:ui/template~TemplateBinding#attribute\n\t\t */\n\n\t\t/**\n\t\t * A custom function to process the value of the {@link module:ui/template~TemplateBinding#attribute}.\n\t\t *\n\t\t * @member {Function} [module:ui/template~TemplateBinding#callback]\n\t\t */\n\t}\n\n\t/**\n\t * Returns the value of the binding. It is the value of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}. The value may be processed by the\n\t * {@link module:ui/template~TemplateBinding#callback}, if such has been passed to the binding.\n\t *\n\t * @param {Node} [node] A native DOM node, passed to the custom {@link module:ui/template~TemplateBinding#callback}.\n\t * @returns {*} The value of {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}.\n\t */\n\tgetValue( node ) {\n\t\tconst value = this.observable[ this.attribute ];\n\n\t\treturn this.callback ? this.callback( value, node ) : value;\n\t}\n\n\t/**\n\t * Activates the listener which waits for changes of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}, then updates the DOM with the aggregated\n\t * value of {@link module:ui/template~TemplateValueSchema}.\n\t *\n\t * @param {module:ui/template~TemplateValueSchema} schema A full schema to generate an attribute or text in the DOM.\n\t * @param {Function} updater A DOM updater function used to update the native DOM attribute or text.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateAttributeListener( schema, updater, data ) {\n\t\tconst callback = () => syncValueSchemaValue( schema, updater, data );\n\n\t\tthis.emitter.listenTo( this.observable, 'change:' + this.attribute, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( this.observable, 'change:' + this.attribute, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes either:\n *\n * * a binding to an {@link module:utils/observablemixin~Observable},\n * * or a native DOM event binding.\n *\n * It is created by the {@link module:ui/template~BindChain#to} method.\n *\n * @protected\n */\nexport class TemplateToBinding extends TemplateBinding {\n\t/**\n\t * Activates the listener for the native DOM event, which when fired, is propagated by\n\t * the {@link module:ui/template~TemplateBinding#emitter}.\n\t *\n\t * @param {String} domEvtName The name of the native DOM event.\n\t * @param {String} domSelector The selector in the DOM to filter delegated events.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateDomEventListener( domEvtName, domSelector, data ) {\n\t\tconst callback = ( evt, domEvt ) => {\n\t\t\tif ( !domSelector || domEvt.target.matches( domSelector ) ) {\n\t\t\t\tif ( typeof this.eventNameOrFunction == 'function' ) {\n\t\t\t\t\tthis.eventNameOrFunction( domEvt );\n\t\t\t\t} else {\n\t\t\t\t\tthis.observable.fire( this.eventNameOrFunction, domEvt );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\tthis.emitter.listenTo( data.node, domEvtName, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( data.node, domEvtName, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes a binding to {@link module:utils/observablemixin~ObservableMixin} created by the {@link module:ui/template~BindChain#if}\n * method.\n *\n * @protected\n */\nexport class TemplateIfBinding extends TemplateBinding {\n\t/**\n\t * @inheritDoc\n\t */\n\tgetValue( node ) {\n\t\tconst value = super.getValue( node );\n\n\t\treturn isFalsy( value ) ? false : ( this.valueIfTrue || true );\n\t}\n\n\t/**\n\t * The value of the DOM attribute or text to be set if the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable} is `true`.\n\t *\n\t * @member {String} [module:ui/template~TemplateIfBinding#valueIfTrue]\n\t */\n}\n\n// Checks whether given {@link module:ui/template~TemplateValueSchema} contains a\n// {@link module:ui/template~TemplateBinding}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @returns {Boolean}\nfunction hasTemplateBinding( schema ) {\n\tif ( !schema ) {\n\t\treturn false;\n\t}\n\n\t// Normalize attributes with additional data like namespace:\n\t//\n\t//\t\tclass: {\n\t//\t\t\tns: 'abc',\n\t//\t\t\tvalue: [ ... ]\n\t//\t\t}\n\t//\n\tif ( schema.value ) {\n\t\tschema = schema.value;\n\t}\n\n\tif ( Array.isArray( schema ) ) {\n\t\treturn schema.some( hasTemplateBinding );\n\t} else if ( schema instanceof TemplateBinding ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Assembles the value using {@link module:ui/template~TemplateValueSchema} and stores it in a form of\n// an Array. Each entry of the Array corresponds to one of {@link module:ui/template~TemplateValueSchema}\n// items.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\n// @returns {Array}\nfunction getValueSchemaValue( schema, node ) {\n\treturn schema.map( schemaItem => {\n\t\t// Process {@link module:ui/template~TemplateBinding} bindings.\n\t\tif ( schemaItem instanceof TemplateBinding ) {\n\t\t\treturn schemaItem.getValue( node );\n\t\t}\n\n\t\t// All static values like strings, numbers, and \"falsy\" values (false, null, undefined, '', etc.) just pass.\n\t\treturn schemaItem;\n\t} );\n}\n\n// A function executed each time the bound Observable attribute changes, which updates the DOM with a value\n// constructed from {@link module:ui/template~TemplateValueSchema}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Function} updater A function which updates the DOM (like attribute or text).\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\nfunction syncValueSchemaValue( schema, updater, { node } ) {\n\tlet value = getValueSchemaValue( schema, node );\n\n\t// Check if schema is a single Template.bind.if, like:\n\t//\n\t//\t\tclass: Template.bind.if( 'foo' )\n\t//\n\tif ( schema.length == 1 && schema[ 0 ] instanceof TemplateIfBinding ) {\n\t\tvalue = value[ 0 ];\n\t} else {\n\t\tvalue = value.reduce( arrayValueReducer, '' );\n\t}\n\n\tif ( isFalsy( value ) ) {\n\t\tupdater.remove();\n\t} else {\n\t\tupdater.set( value );\n\t}\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset `textContent`.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @returns {Object}\nfunction getTextUpdater( node ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tnode.textContent = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tnode.textContent = '';\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset an attribute.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} attrName Name of the attribute to be modified.\n// @param {String} [ns=null] Namespace to use.\n// @returns {Object}\nfunction getAttributeUpdater( el, attrName, ns ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.setAttributeNS( ns, attrName, value );\n\t\t},\n\n\t\tremove() {\n\t\t\tel.removeAttributeNS( ns, attrName );\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of CSSStyleDeclaration to set or remove a style.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} styleName Name of the style to be modified.\n// @returns {Object}\nfunction getStyleUpdater( el, styleName ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.style[ styleName ] = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tel.style[ styleName ] = null;\n\t\t}\n\t};\n}\n\n// Clones definition of the template.\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition}\nfunction clone( def ) {\n\tconst clone = cloneDeepWith( def, value => {\n\t\t// Don't clone the `Template.bind`* bindings because of the references to Observable\n\t\t// and DomEmitterMixin instances inside, which would also be traversed and cloned by greedy\n\t\t// cloneDeepWith algorithm. There's no point in cloning Observable/DomEmitterMixins\n\t\t// along with the definition.\n\t\t//\n\t\t// Don't clone Template instances if provided as a child. They're simply #render()ed\n\t\t// and nothing should interfere.\n\t\t//\n\t\t// Also don't clone View instances if provided as a child of the Template. The template\n\t\t// instance will be extracted from the View during the normalization and there's no need\n\t\t// to clone it.\n\t\tif ( value && ( value instanceof TemplateBinding || isTemplate( value ) || isView( value ) || isViewCollection( value ) ) ) {\n\t\t\treturn value;\n\t\t}\n\t} );\n\n\treturn clone;\n}\n\n// Normalizes given {@link module:ui/template~TemplateDefinition}.\n//\n// See:\n// * {@link normalizeAttributes}\n// * {@link normalizeListeners}\n// * {@link normalizePlainTextDefinition}\n// * {@link normalizeTextDefinition}\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition} Normalized definition.\nfunction normalize( def ) {\n\tif ( typeof def == 'string' ) {\n\t\tdef = normalizePlainTextDefinition( def );\n\t} else if ( def.text ) {\n\t\tnormalizeTextDefinition( def );\n\t}\n\n\tif ( def.on ) {\n\t\tdef.eventListeners = normalizeListeners( def.on );\n\n\t\t// Template mixes EmitterMixin, so delete #on to avoid collision.\n\t\tdelete def.on;\n\t}\n\n\tif ( !def.text ) {\n\t\tif ( def.attributes ) {\n\t\t\tnormalizeAttributes( def.attributes );\n\t\t}\n\n\t\tconst children = [];\n\n\t\tif ( def.children ) {\n\t\t\tif ( isViewCollection( def.children ) ) {\n\t\t\t\tchildren.push( def.children );\n\t\t\t} else {\n\t\t\t\tfor ( const child of def.children ) {\n\t\t\t\t\tif ( isTemplate( child ) || isView( child ) || isNode( child ) ) {\n\t\t\t\t\t\tchildren.push( child );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tchildren.push( new Template( child ) );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tdef.children = children;\n\t}\n\n\treturn def;\n}\n\n// Normalizes \"attributes\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tattributes: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: {\n//\t\t\t\tvalue: 'bar'\n//\t\t\t}\n//\t\t}\n//\n// becomes\n//\n//\t\tattributes: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: {\n//\t\t\t\tvalue: [ 'bar' ]\n//\t\t\t}\n//\t\t}\n//\n// @param {Object} attributes\nfunction normalizeAttributes( attributes ) {\n\tfor ( const a in attributes ) {\n\t\tif ( attributes[ a ].value ) {\n\t\t\tattributes[ a ].value = [].concat( attributes[ a ].value );\n\t\t}\n\n\t\tarrayify( attributes, a );\n\t}\n}\n\n// Normalizes \"on\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\ton: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// becomes\n//\n//\t\ton: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// @param {Object} listeners\n// @returns {Object} Object containing normalized listeners.\nfunction normalizeListeners( listeners ) {\n\tfor ( const l in listeners ) {\n\t\tarrayify( listeners, l );\n\t}\n\n\treturn listeners;\n}\n\n// Normalizes \"string\" {@link module:ui/template~TemplateDefinition}.\n//\n//\t\t\"foo\"\n//\n// becomes\n//\n//\t\t{ text: [ 'foo' ] },\n//\n// @param {String} def\n// @returns {module:ui/template~TemplateDefinition} Normalized template definition.\nfunction normalizePlainTextDefinition( def ) {\n\treturn {\n\t\ttext: [ def ]\n\t};\n}\n\n// Normalizes text {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tchildren: [\n//\t\t\t{ text: 'def' },\n//\t\t\t{ text: {@link module:ui/template~TemplateBinding} }\n//\t\t]\n//\n// becomes\n//\n//\t\tchildren: [\n//\t\t\t{ text: [ 'def' ] },\n//\t\t\t{ text: [ {@link module:ui/template~TemplateBinding} ] }\n//\t\t]\n//\n// @param {module:ui/template~TemplateDefinition} def\nfunction normalizeTextDefinition( def ) {\n\tif ( !Array.isArray( def.text ) ) {\n\t\tdef.text = [ def.text ];\n\t}\n}\n\n// Wraps an entry in Object in an Array, if not already one.\n//\n//\t\t{\n//\t\t\tx: 'y',\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// becomes\n//\n//\t\t{\n//\t\t\tx: [ 'y' ],\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// @param {Object} obj\n// @param {String} key\nfunction arrayify( obj, key ) {\n\tif ( !Array.isArray( obj[ key ] ) ) {\n\t\tobj[ key ] = [ obj[ key ] ];\n\t}\n}\n\n// A helper which concatenates the value avoiding unwanted\n// leading white spaces.\n//\n// @param {String} prev\n// @param {String} cur\n// @returns {String}\nfunction arrayValueReducer( prev, cur ) {\n\tif ( isFalsy( cur ) ) {\n\t\treturn prev;\n\t} else if ( isFalsy( prev ) ) {\n\t\treturn cur;\n\t} else {\n\t\treturn `${ prev } ${ cur }`;\n\t}\n}\n\n// Extends one object defined in the following format:\n//\n//\t\t{\n//\t\t\tkey1: [Array1],\n//\t\t\tkey2: [Array2],\n//\t\t\t...\n//\t\t\tkeyN: [ArrayN]\n//\t\t}\n//\n// with another object of the same data format.\n//\n// @param {Object} obj Base object.\n// @param {Object} ext Object extending base.\n// @returns {String}\nfunction extendObjectValueArray( obj, ext ) {\n\tfor ( const a in ext ) {\n\t\tif ( obj[ a ] ) {\n\t\t\tobj[ a ].push( ...ext[ a ] );\n\t\t} else {\n\t\t\tobj[ a ] = ext[ a ];\n\t\t}\n\t}\n}\n\n// A helper for {@link module:ui/template~Template#extend}. Recursively extends {@link module:ui/template~Template} instance\n// with content from {@link module:ui/template~TemplateDefinition}. See {@link module:ui/template~Template#extend} to learn more.\n//\n// @param {module:ui/template~Template} def A template instance to be extended.\n// @param {module:ui/template~TemplateDefinition} def A definition which is to extend the template instance.\n// @param {Object} Error context.\nfunction extendTemplate( template, def ) {\n\tif ( def.attributes ) {\n\t\tif ( !template.attributes ) {\n\t\t\ttemplate.attributes = {};\n\t\t}\n\n\t\textendObjectValueArray( template.attributes, def.attributes );\n\t}\n\n\tif ( def.eventListeners ) {\n\t\tif ( !template.eventListeners ) {\n\t\t\ttemplate.eventListeners = {};\n\t\t}\n\n\t\textendObjectValueArray( template.eventListeners, def.eventListeners );\n\t}\n\n\tif ( def.text ) {\n\t\ttemplate.text.push( ...def.text );\n\t}\n\n\tif ( def.children && def.children.length ) {\n\t\tif ( template.children.length != def.children.length ) {\n\t\t\t/**\n\t\t\t * The number of children in extended definition does not match.\n\t\t\t *\n\t\t\t * @error ui-template-extend-children-mismatch\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-extend-children-mismatch: The number of children in extended definition does not match.',\n\t\t\t\ttemplate\n\t\t\t);\n\t\t}\n\n\t\tlet childIndex = 0;\n\n\t\tfor ( const childDef of def.children ) {\n\t\t\textendTemplate( template.children[ childIndex++ ], childDef );\n\t\t}\n\t}\n}\n\n// Checks if value is \"falsy\".\n// Note: 0 (Number) is not \"falsy\" in this context.\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isFalsy( value ) {\n\treturn !value && value !== 0;\n}\n\n// Checks if the item is an instance of {@link module:ui/view~View}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isView( item ) {\n\treturn item instanceof View;\n}\n\n// Checks if the item is an instance of {@link module:ui/template~Template}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isTemplate( item ) {\n\treturn item instanceof Template;\n}\n\n// Checks if the item is an instance of {@link module:ui/viewcollection~ViewCollection}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isViewCollection( item ) {\n\treturn item instanceof ViewCollection;\n}\n\n// Creates an empty skeleton for {@link module:ui/template~Template#revert}\n// data.\n//\n// @private\nfunction getEmptyRevertData() {\n\treturn {\n\t\tchildren: [],\n\t\tbindings: [],\n\t\tattributes: {}\n\t};\n}\n\n// Checks whether an attribute should be extended when\n// {@link module:ui/template~Template#apply} is called.\n//\n// @private\n// @param {String} attrName Attribute name to check.\nfunction shouldExtend( attrName ) {\n\treturn attrName == 'class' || attrName == 'style';\n}\n\n/**\n * A definition of the {@link module:ui/template~Template}. It describes what kind of\n * node a template will render (HTML element or text), attributes of an element, DOM event\n * listeners and children.\n *\n * Also see:\n * * {@link module:ui/template~TemplateValueSchema} to learn about HTML element attributes,\n * * {@link module:ui/template~TemplateListenerSchema} to learn about DOM event listeners.\n *\n * A sample definition on an HTML element can look like this:\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\ttag: 'span',\n *\t\t\t\t\tattributes: { ... },\n *\t\t\t\t\tchildren: [ ... ],\n *\t\t\t\t},\n *\t\t\t\t{\n *\t\t\t\t\ttext: 'static–text'\n *\t\t\t\t},\n *\t\t\t\t'also-static–text',\n *\t\t\t],\n *\t\t\tattributes: {\n *\t\t\t\tclass: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tid: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tstyle: {@link module:ui/template~TemplateValueSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\t'click': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// Document.querySelector format is also accepted.\n *\t\t\t\t'keyup@a.some-class': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t}\n *\t\t} );\n *\n * A {@link module:ui/view~View}, another {@link module:ui/template~Template} or a native DOM node\n * can also become a child of a template. When a view is passed, its {@link module:ui/view~View#element} is used:\n *\n *\t\tconst view = new SomeView();\n *\t\tconst childTemplate = new Template( { ... } );\n *\t\tconst childNode = document.createElement( 'b' );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: [\n *\t\t\t\t// view#element will be added as a child of this <p>.\n *\t\t\t\tview,\n *\n * \t\t\t\t// The output of childTemplate.render() will be added here.\n *\t\t\t\tchildTemplate,\n *\n *\t\t\t\t// Native DOM nodes are included directly in the rendered output.\n *\t\t\t\tchildNode\n *\t\t\t]\n *\t\t} );\n *\n * An entire {@link module:ui/viewcollection~ViewCollection} can be used as a child in the definition:\n *\n *\t\tconst collection = new ViewCollection();\n *\t\tcollection.add( someView );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: collection\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateDefinition\n * @type Object\n *\n * @property {String} tag See the template {@link module:ui/template~Template#tag} property.\n *\n * @property {Array.<module:ui/template~TemplateDefinition>} [children]\n * See the template {@link module:ui/template~Template#children} property.\n *\n * @property {Object.<String, module:ui/template~TemplateValueSchema>} [attributes]\n * See the template {@link module:ui/template~Template#attributes} property.\n *\n * @property {String|module:ui/template~TemplateValueSchema|Array.<String|module:ui/template~TemplateValueSchema>} [text]\n * See the template {@link module:ui/template~Template#text} property.\n *\n * @property {Object.<String, module:ui/template~TemplateListenerSchema>} [on]\n * See the template {@link module:ui/template~Template#eventListeners} property.\n */\n\n/**\n * Describes a value of an HTML element attribute or `textContent`. It allows combining multiple\n * data sources like static values and {@link module:utils/observablemixin~Observable} attributes.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn where to use it,\n * * {@link module:ui/template~Template.bind} to learn how to configure\n * {@link module:utils/observablemixin~Observable} attribute bindings,\n * * {@link module:ui/template~Template#render} to learn how to render a template,\n * * {@link module:ui/template~BindChain#to `to()`} and {@link module:ui/template~BindChain#if `if()`}\n * methods to learn more about bindings.\n *\n * Attribute values can be described in many different ways:\n *\n *\t\t// Bind helper will create bindings to attributes of the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// A plain string schema.\n *\t\t\t\t'class': 'static-text',\n *\n *\t\t\t\t// An object schema, binds to the \"foo\" attribute of the\n *\t\t\t\t// observable and follows its value.\n *\t\t\t\t'class': bind.to( 'foo' ),\n *\n *\t\t\t\t// An array schema, combines the above.\n *\t\t\t\t'class': [\n *\t\t\t\t\t'static-text',\n *\t\t\t\t\tbind.to( 'bar', () => { ... } ),\n *\n * \t\t\t\t\t// Bindings can also be conditional.\n *\t\t\t\t\tbind.if( 'baz', 'class-when-baz-is-true' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema, with a custom namespace, e.g. useful for creating SVGs.\n *\t\t\t\t'class': {\n *\t\t\t\t\tns: 'http://ns.url',\n *\t\t\t\t\tvalue: [\n *\t\t\t\t\t\tbind.if( 'baz', 'value-when-true' ),\n *\t\t\t\t\t\t'static-text'\n *\t\t\t\t\t]\n *\t\t\t\t},\n *\n *\t\t\t\t// An object schema, specific for styles.\n *\t\t\t\tstyle: {\n *\t\t\t\t\tcolor: 'red',\n *\t\t\t\t\tbackgroundColor: bind.to( 'qux', () => { ... } )\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * Text nodes can also have complex values:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\t// Will render a \"foo\" text node.\n *\t\tnew Template( {\n *\t\t\ttext: 'foo'\n *\t\t} );\n *\n *\t\t// Will render a \"static text: {observable.foo}\" text node.\n *\t\t// The text of the node will be updated as the \"foo\" attribute changes.\n *\t\tnew Template( {\n *\t\t\ttext: [\n *\t\t\t\t'static text: ',\n *\t\t\t\tbind.to( 'foo', () => { ... } )\n *\t\t\t]\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateValueSchema\n * @type {Object|String|Array}\n */\n\n/**\n * Describes an event listener attached to an HTML element. Such listener can propagate DOM events\n * through an {@link module:utils/observablemixin~Observable} instance, execute custom callbacks\n * or both, if necessary.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn more about template definitions,\n * * {@link module:ui/template~BindChain#to `to()`} method to learn more about bindings.\n *\n * Check out different ways of attaching event listeners below:\n *\n *\t\t// Bind helper will propagate events through the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\ton: {\n *\t\t\t\t// An object schema. The observable will fire the \"clicked\" event upon DOM \"click\".\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\n *\t\t\t\t// An object schema. It will work for \"click\" event on \"a.foo\" children only.\n *\t\t\t\t'click@a.foo': bind.to( 'clicked' )\n *\n *\t\t\t\t// An array schema, makes the observable propagate multiple events.\n *\t\t\t\tclick: [\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( 'executed' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema with a custom callback.\n *\t\t\t\t'click@a.foo': {\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( evt => {\n *\t\t\t\t\t\tconsole.log( `${ evt.target } has been clicked!` );\n *\t\t\t\t\t} }\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateListenerSchema\n * @type {Object|String|Array}\n */\n\n/**\n * The return value of {@link ~Template.bind `Template.bind()`}. It provides `to()` and `if()`\n * methods to create the {@link module:utils/observablemixin~Observable observable} attribute and event bindings.\n *\n * @interface module:ui/template~BindChain\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to either:\n *\n * * an HTML element attribute or a text node `textContent`, so it remains in sync with the observable\n * attribute as it changes,\n * * or an HTML element DOM event, so the DOM events are propagated through an observable.\n *\n * Some common use cases of `to()` bindings are presented below:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// class=\"...\" attribute gets bound to `observable#a`\n *\t\t\t\tclass: bind.to( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t// <p>...</p> gets bound to observable#b; always `toUpperCase()`.\n *\t\t\t\t{\n *\t\t\t\t\ttext: bind.to( 'b', ( value, node ) => value.toUpperCase() )\n *\t\t\t\t}\n *\t\t\t],\n *\t\t\ton: {\n *\t\t\t\tclick: [\n *\t\t\t\t\t// An observable will fire \"clicked\" upon \"click\" in the DOM.\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\n *\t\t\t\t\t// A custom callback will be executed upon \"click\" in the DOM.\n *\t\t\t\t\tbind.to( () => {\n *\t\t\t\t\t\t...\n *\t\t\t\t\t} )\n *\t\t\t\t]\n *\t\t\t}\n *\t\t} ).render();\n *\n * Learn more about using `to()` in the {@link module:ui/template~TemplateValueSchema} and\n * {@link module:ui/template~TemplateListenerSchema}.\n *\n * @method #to\n * @param {String|Function} eventNameOrFunctionOrAttribute An attribute name of\n * {@link module:utils/observablemixin~Observable} or a DOM event name or an event callback.\n * @param {Function} [callback] Allows for processing of the value. Accepts `Node` and `value` as arguments.\n * @returns {module:ui/template~TemplateBinding}\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to an HTML element attribute or a text\n * node `textContent` so it remains in sync with the observable attribute as it changes.\n *\n * Unlike {@link module:ui/template~BindChain#to}, it controls the presence of the attribute or `textContent`\n * depending on the \"falseness\" of an {@link module:utils/observablemixin~Observable} attribute.\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'input',\n *\t\t\tattributes: {\n *\t\t\t\t// <input checked> when `observable#a` is not undefined/null/false/''\n *\t\t\t\t// <input> when `observable#a` is undefined/null/false\n *\t\t\t\tchecked: bind.if( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\t// <input>\"b-is-not-set\"</input> when `observable#b` is undefined/null/false/''\n *\t\t\t\t\t// <input></input> when `observable#b` is not \"falsy\"\n *\t\t\t\t\ttext: bind.if( 'b', 'b-is-not-set', ( value, node ) => !value )\n *\t\t\t\t}\n *\t\t\t]\n *\t\t} ).render();\n *\n * Learn more about using `if()` in the {@link module:ui/template~TemplateValueSchema}.\n *\n * @method #if\n * @param {String} attribute An attribute name of {@link module:utils/observablemixin~Observable} used in the binding.\n * @param {String} [valueIfTrue] Value set when the {@link module:utils/observablemixin~Observable} attribute is not\n * undefined/null/false/'' (empty string).\n * @param {Function} [callback] Allows for processing of the value. Accepts `Node` and `value` as arguments.\n * @returns {module:ui/template~TemplateBinding}\n */\n\n/**\n * The {@link module:ui/template~Template#_renderNode} configuration.\n *\n * @private\n * @interface module:ui/template~RenderData\n */\n\n/**\n * Tells {@link module:ui/template~Template#_renderNode} to render\n * children into `DocumentFragment` first and then append the fragment\n * to the parent element. It is a speed optimization.\n *\n * @member {Boolean} #intoFragment\n */\n\n/**\n * A node which is being rendered.\n *\n * @member {HTMLElement|Text} #node\n */\n\n/**\n * Indicates whether the {@module:ui/template~RenderNodeOptions#node} has\n * been provided by {@module:ui/template~Template#apply}.\n *\n * @member {Boolean} #isApplying\n */\n\n/**\n * An object storing the data that helps {@module:ui/template~Template#revert}\n * bringing back an element to its initial state, i.e. before\n * {@module:ui/template~Template#apply} was called.\n *\n * @member {Object} #revertData\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/view\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ViewCollection from './viewcollection';\nimport Template from './template';\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\nimport '../theme/globals/globals.css';\n\n/**\n * The basic view class, which represents an HTML element created out of a\n * {@link module:ui/view~View#template}. Views are building blocks of the user interface and handle\n * interaction\n *\n * Views {@link module:ui/view~View#registerChild aggregate} children in\n * {@link module:ui/view~View#createCollection collections} and manage the life cycle of DOM\n * listeners e.g. by handling rendering and destruction.\n *\n * See the {@link module:ui/template~TemplateDefinition} syntax to learn more about shaping view\n * elements, attributes and listeners.\n *\n *\t\tclass SampleView extends View {\n *\t\t\tconstructor( locale ) {\n *\t\t\t\tsuper( locale );\n *\n *\t\t\t\tconst bind = this.bindTemplate;\n *\n *\t\t\t\t// Views define their interface (state) using observable attributes.\n *\t\t\t\tthis.set( 'elementClass', 'bar' );\n *\n *\t\t\t\tthis.setTemplate( {\n *\t\t\t\t\ttag: 'p',\n *\n *\t\t\t\t\t// The element of the view can be defined with its children.\n *\t\t\t\t\tchildren: [\n *\t\t\t\t\t\t'Hello',\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\ttag: 'b',\n *\t\t\t\t\t\t\tchildren: [ 'world!' ]\n *\t\t\t\t\t\t}\n *\t\t\t\t\t],\n *\t\t\t\t\tattributes: {\n *\t\t\t\t\t\tclass: [\n *\t\t\t\t\t\t\t'foo',\n *\n *\t\t\t\t\t\t\t// Observable attributes control the state of the view in DOM.\n *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n *\t\t\t\t\t\t]\n *\t\t\t\t\t},\n *\t\t\t\t\ton: {\n *\t\t\t\t\t\t// Views listen to DOM events and propagate them.\n *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t\t\t}\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n *\t\tconst view = new SampleView( locale );\n *\n *\t\tview.render();\n *\n *\t\t// Append <p class=\"foo bar\">Hello<b>world</b></p> to the <body>\n *\t\tdocument.body.appendChild( view.element );\n *\n *\t\t// Change the class attribute to <p class=\"foo baz\">Hello<b>world</b></p>\n *\t\tview.elementClass = 'baz';\n *\n *\t\t// Respond to the \"click\" event in DOM by executing a custom action.\n *\t\tview.on( 'clicked', () => {\n *\t\t\tconsole.log( 'The view has been clicked!' );\n *\t\t} );\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class View {\n\t/**\n\t * Creates an instance of the {@link module:ui/view~View} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n\tconstructor( locale ) {\n\t\t/**\n\t\t * An HTML element of the view. `null` until {@link #render rendered}\n\t\t * from the {@link #template}.\n\t\t *\n\t\t *\t\tclass SampleView extends View {\n\t\t *\t\t\tconstructor() {\n\t\t *\t\t\t\tsuper();\n\t\t *\n\t\t *\t\t\t\t// A template instance the #element will be created from.\n\t\t *\t\t\t\tthis.setTemplate( {\n\t\t *\t\t\t\t\ttag: 'p'\n\t\t *\n\t\t *\t\t\t\t\t// ...\n\t\t *\t\t\t\t} );\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t *\t\tconst view = new SampleView();\n\t\t *\n\t\t *\t\t// Renders the #template.\n\t\t *\t\tview.render();\n\t\t *\n\t\t *\t\t// Append the HTML element of the view to <body>.\n\t\t *\t\tdocument.body.appendChild( view.element );\n\t\t *\n\t\t * **Note**: The element of the view can also be assigned directly:\n\t\t *\n\t\t *\t\tview.element = document.querySelector( '#my-container' );\n\t\t *\n\t\t * @member {HTMLElement}\n\t\t */\n\t\tthis.element = null;\n\n\t\t/**\n\t\t * Set `true` when the view has already been {@link module:ui/view~View#render rendered}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isRendered\n\t\t */\n\t\tthis.isRendered = false;\n\n\t\t/**\n\t\t * A set of tools to localize the user interface.\n\t\t *\n\t\t * Also see {@link module:core/editor/editor~Editor#locale}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * Note: If {@link #locale} instance hasn't been passed to the view this method may not\n\t\t * be available.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method\n\t\t */\n\t\tthis.t = locale && locale.t;\n\n\t\t/**\n\t\t * Collections registered with {@link #createCollection}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set.<module:ui/viewcollection~ViewCollection>}\n\t\t */\n\t\tthis._viewCollections = new Collection();\n\n\t\t/**\n\t\t * A collection of view instances, which have been added directly\n\t\t * into the {@link module:ui/template~Template#children}.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis._unboundChildren = this.createCollection();\n\n\t\t// Pass parent locale to its children.\n\t\tthis._viewCollections.on( 'add', ( evt, collection ) => {\n\t\t\tcollection.locale = locale;\n\t\t} );\n\n\t\t/**\n\t\t * Template of this view. It provides the {@link #element} representing\n\t\t * the view in DOM, which is {@link #render rendered}.\n\t\t *\n\t\t * @member {module:ui/template~Template} #template\n\t\t */\n\n\t\t/**\n\t\t * Cached {@link module:ui/template~BindChain bind chain} object created by the\n\t\t * {@link #template}. See {@link #bindTemplate}.\n\t\t *\n\t\t * @private\n\t\t * @member {Object} #_bindTemplate\n\t\t */\n\n\t\tthis.decorate( 'render' );\n\t}\n\n\t/**\n\t * Shorthand for {@link module:ui/template~Template.bind}, a binding\n\t * {@link module:ui/template~BindChain interface} pre–configured for the view instance.\n\t *\n\t * It provides {@link module:ui/template~BindChain#to `to()`} and\n\t * {@link module:ui/template~BindChain#if `if()`} methods that initialize bindings with\n\t * observable attributes and attach DOM listeners.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tconst bind = this.bindTemplate;\n\t *\n\t *\t\t\t\t// These {@link module:utils/observablemixin~Observable observable} attributes will control\n\t *\t\t\t\t// the state of the view in DOM.\n\t *\t\t\t\tthis.set( {\n\t *\t\t\t\t\telementClass: 'foo',\n\t *\t\t\t\t \tisEnabled: true\n\t *\t\t\t\t } );\n\t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\t// The class HTML attribute will follow elementClass\n\t *\t\t\t\t\t\t// and isEnabled view attributes.\n\t *\t\t\t\t\t\tclass: [\n\t *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n\t *\t\t\t\t\t\t\tbind.if( 'isEnabled', 'present-when-enabled' )\n\t *\t\t\t\t\t\t]\n\t *\t\t\t\t\t},\n\t *\n\t *\t\t\t\t\ton: {\n\t *\t\t\t\t\t\t// The view will fire the \"clicked\" event upon clicking <p> in DOM.\n\t *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n\t *\t\t\t\t\t}\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * @method #bindTemplate\n\t */\n\tget bindTemplate() {\n\t\tif ( this._bindTemplate ) {\n\t\t\treturn this._bindTemplate;\n\t\t}\n\n\t\treturn ( this._bindTemplate = Template.bind( this, this ) );\n\t}\n\n\t/**\n\t * Creates a new collection of views, which can be used as\n\t * {@link module:ui/template~Template#children} of this view.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.items = this.createCollection();\n \t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\t// `items` collection will render here.\n\t *\t\t\t\t\tchildren: this.items\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\t\tconst child = new ChildView( locale );\n\t *\n\t *\t\tview.render();\n\t *\n\t *\t\t// It will append <p></p> to the <body>.\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t *\t\t// From now on the child is nested under its parent, which is also reflected in DOM.\n\t *\t\t// <p><child#element></p>\n\t *\t\tview.items.add( child );\n\t *\n\t * @returns {module:ui/viewcollection~ViewCollection} A new collection of view instances.\n\t */\n\tcreateCollection() {\n\t\tconst collection = new ViewCollection();\n\n\t\tthis._viewCollections.add( collection );\n\n\t\treturn collection;\n\t}\n\n\t/**\n\t * Registers a new child view under the view instance. Once registered, a child\n\t * view is managed by its parent, including {@link #render rendering}\n\t * and {@link #destroy destruction}.\n\t *\n\t * To revert this, use {@link #deregisterChild}.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.setTemplate( { tag: 'p' } );\n\t *\n\t *\t\t\t\t// Register the children.\n\t *\t\t\t\tthis.registerChild( [ this.childA, this.childB ] );\n\t *\t\t\t}\n\t *\n\t *\t\t\trender() {\n\t *\t\t\t\tsuper.render();\n\t *\n\t *\t\t\t\tthis.element.appendChild( this.childA.element );\n\t *\t\t\t\tthis.element.appendChild( this.childB.element );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\n\t *\t\tview.render();\n\t *\n\t *\t\t// Will append <p><childA#element><b></b><childB#element></p>.\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t * **Note**: There's no need to add child views if they're already referenced in the\n\t * {@link #template}:\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n \t *\t\t\t\t\t// These children will be added automatically. There's no\n \t *\t\t\t\t\t// need to call {@link #registerChild} for any of them.\n\t *\t\t\t\t\tchildren: [ this.childA, this.childB ]\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\n\t *\t\t\t// ...\n\t *\t\t}\n\t *\n\t * @param {module:ui/view~View|Iterable.<module:ui/view~View>} children Children views to be registered.\n\t */\n\tregisterChild( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tfor ( const child of children ) {\n\t\t\tthis._unboundChildren.add( child );\n\t\t}\n\t}\n\n\t/**\n\t * The opposite of {@link #registerChild}. Removes a child view from this view instance.\n\t * Once removed, the child is no longer managed by its parent, e.g. it can safely\n\t * become a child of another parent view.\n\t *\n\t * @see #registerChild\n\t * @param {module:ui/view~View|Iterable.<module:ui/view~View>} children Child views to be removed.\n\t */\n\tderegisterChild( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tfor ( const child of children ) {\n\t\t\tthis._unboundChildren.remove( child );\n\t\t}\n\t}\n\n\t/**\n\t * Sets the {@link #template} of the view with with given definition.\n\t *\n\t * A shorthand for:\n\t *\n\t *\t\tview.setTemplate( definition );\n\t *\n\t * @param {module:ui/template~TemplateDefinition} definition Definition of view's template.\n\t */\n\tsetTemplate( definition ) {\n\t\tthis.template = new Template( definition );\n\t}\n\n\t/**\n\t * {@link module:ui/template~Template.extend Extends} the {@link #template} of the view with\n\t * with given definition.\n\t *\n\t * A shorthand for:\n\t *\n\t *\t\tTemplate.extend( view.template, definition );\n\t *\n\t * **Note**: Is requires the {@link #template} to be already set. See {@link #setTemplate}.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} definition Definition which\n\t * extends the {@link #template}.\n\t */\n\textendTemplate( definition ) {\n\t\tTemplate.extend( this.template, definition );\n\t}\n\n\t/**\n\t * Recursively renders the view.\n\t *\n\t * Once the view is rendered:\n\t * * the {@link #element} becomes an HTML element out of {@link #template},\n\t * * the {@link #isRendered} flag is set `true`.\n\t *\n\t * **Note**: The children of the view:\n\t * * defined directly in the {@link #template}\n\t * * residing in collections created by the {@link #createCollection} method,\n\t * * and added by {@link #registerChild}\n\t * are also rendered in the process.\n\t *\n\t * In general, `render()` method is the right place to keep the code which refers to the\n\t * {@link #element} and should be executed at the very beginning of the view's life cycle.\n\t *\n\t * It is possible to {@link module:ui/template~Template.extend} the {@link #template} before\n\t * the view is rendered. To allow an early customization of the view (e.g. by its parent),\n\t * such references should be done in `render()`.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor() {\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\t// ...\n\t *\t\t\t\t} );\n\t *\t\t\t},\n\t *\n\t *\t\t\trender() {\n\t *\t\t\t\t// View#element becomes available.\n\t *\t\t\t\tsuper.render();\n\t *\n\t *\t\t\t\t// The \"scroll\" listener depends on #element.\n\t *\t\t\t\tthis.listenTo( window, 'scroll', () => {\n\t *\t\t\t\t\t// A reference to #element would render the #template and make it non-extendable.\n\t *\t\t\t\t\tif ( window.scrollY > 0 ) {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 100;\n\t *\t\t\t\t\t} else {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 0;\n\t *\t\t\t\t\t}\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView();\n\t *\n\t *\t\t// Let's customize the view before it gets rendered.\n\t *\t\tview.extendTemplate( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: [\n\t *\t\t\t\t\t'additional-class'\n\t *\t\t\t\t]\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Late rendering allows customization of the view.\n\t *\t\tview.render();\n\t */\n\trender() {\n\t\tif ( this.isRendered ) {\n\t\t\t/**\n\t\t\t * This View has already been rendered.\n\t\t\t *\n\t\t\t * @error ui-view-render-rendered\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-view-render-already-rendered: This View has already been rendered.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\t// Render #element of the view.\n\t\tif ( this.template ) {\n\t\t\tthis.element = this.template.render();\n\n\t\t\t// Auto–register view children from #template.\n\t\t\tthis.registerChild( this.template.getViews() );\n\t\t}\n\n\t\tthis.isRendered = true;\n\t}\n\n\t/**\n\t * Recursively destroys the view instance and child views added by {@link #registerChild} and\n\t * residing in collections created by the {@link #createCollection}.\n\t *\n\t * Destruction disables all event listeners:\n\t * * created on the view, e.g. `view.on( 'event', () => {} )`,\n\t * * defined in the {@link #template} for DOM events.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\n\t\tthis._viewCollections.map( c => c.destroy() );\n\n\t\t// Template isn't obligatory for views.\n\t\tif ( this.template && this.template._revertData ) {\n\t\t\tthis.template.revert( this.element );\n\t\t}\n\t}\n\n\t/**\n\t * Event fired by the {@link #render} method. Actual rendering is executed as a listener to\n\t * this event with the default priority.\n\t *\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * @event render\n\t */\n}\n\nmix( View, DomEmitterMixin );\nmix( View, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/editorui/editoruiview\n */\n\n/* globals document */\n\nimport View from '../view';\nimport Template from '../template';\n\nimport '../../theme/components/editorui/editorui.css';\n\n/**\n * The editor UI view class. Base class for the editor main views.\n *\n * @extends module:ui/view~View\n */\nexport default class EditorUIView extends View {\n\t/**\n\t * Creates an instance of the editor UI view class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Collection of the child views, detached from the DOM\n\t\t * structure of the editor, like panels, icons etc.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection} #body\n\t\t */\n\t\tthis.body = this.createCollection();\n\n\t\t/**\n\t\t * The element holding elements of the 'body' region.\n\t\t *\n\t\t * @private\n\t\t * @member {HTMLElement} #_bodyCollectionContainer\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis._renderBodyCollection();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tthis._bodyCollectionContainer.remove();\n\n\t\treturn super.destroy();\n\t}\n\n\t/**\n\t * Creates and appends to `<body>` the {@link #body} collection container.\n\t *\n\t * @private\n\t */\n\t_renderBodyCollection() {\n\t\tconst locale = this.locale;\n\t\tconst bodyElement = this._bodyCollectionContainer = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset_all',\n\t\t\t\t\t'ck-body',\n\t\t\t\t\t'ck-rounded-corners'\n\t\t\t\t],\n\t\t\t\tdir: locale.uiLanguageDirection,\n\t\t\t},\n\t\t\tchildren: this.body\n\t\t} ).render();\n\n\t\tdocument.body.appendChild( bodyElement );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/label/labelview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/label/label.css';\n\n/**\n * The label view class.\n *\n * @extends module:ui/view~View\n */\nexport default class LabelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The text of the label.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #text\n\t\t */\n\t\tthis.set( 'text' );\n\n\t\t/**\n\t\t * The `for` attribute of the label (i.e. to pair with an `<input>` element).\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #for\n\t\t */\n\t\tthis.set( 'for' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'label',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-label'\n\t\t\t\t],\n\t\t\t\tfor: bind.to( 'for' )\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: bind.to( 'text' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/editorui/boxed/boxededitoruiview\n */\nimport EditorUIView from '../../editorui/editoruiview';\nimport LabelView from '../../label/labelview';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\n/**\n * The boxed editor UI view class. This class represents an editor interface\n * consisting of a toolbar and an editable area, enclosed within a box.\n *\n * @extends module:ui/editorui/editoruiview~EditorUIView\n */\nexport default class BoxedEditorUIView extends EditorUIView {\n /**\n\t * Creates an instance of the boxed editor UI view class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The locale instance..\n\t */\n constructor(locale) {\n super(locale);\n const ariaLabelUid = uid();\n /**\n\t\t * Collection of the child views located in the top (`.ck-editor__top`)\n\t\t * area of the UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.top = this.createCollection();\n /**\n\t\t * Collection of the child views located in the main (`.ck-editor__main`)\n\t\t * area of the UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.main = this.createCollection();\n /**\n\t\t * Voice label of the UI.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #_voiceLabelView\n\t\t */\n this._voiceLabelView = this._createVoiceLabel(ariaLabelUid);\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-reset',\n 'ck-editor',\n 'ck-rounded-corners'\n ],\n role: 'application',\n dir: locale.uiLanguageDirection,\n lang: locale.uiLanguage,\n 'aria-labelledby': `ck-editor__aria-label_${ ariaLabelUid }`\n },\n children: [\n this._voiceLabelView,\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-editor__top',\n 'ck-reset_all'\n ],\n role: 'presentation'\n },\n children: this.top\n },\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-editor__main'\n ],\n role: 'presentation'\n },\n children: this.main\n }\n ]\n });\n }\n /**\n\t * Creates a voice label view instance.\n\t *\n\t * @private\n\t * @returns {module:ui/label/labelview~LabelView}\n\t */\n _createVoiceLabel(ariaLabelUid) {\n const t = this.t;\n const voiceLabel = new LabelView();\n voiceLabel.text = t('bl');\n voiceLabel.extendTemplate({\n attributes: {\n id: `ck-editor__aria-label_${ ariaLabelUid }`,\n class: 'ck-voice-label'\n }\n });\n return voiceLabel;\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/editableui/inline/inlineeditableuiview\n */\nimport EditableUIView from '../../editableui/editableuiview';\n/**\n * The inline editable UI class implementing an inline {@link module:ui/editableui/editableuiview~EditableUIView}.\n *\n * @extends module:ui/editableui/editableuiview~EditableUIView\n */\nexport default class InlineEditableUIView extends EditableUIView {\n /**\n\t * Creates an instance of the InlineEditableUIView class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance the editable is related to.\n\t * @param {HTMLElement} [editableElement] The editable element. If not specified, the\n\t * {@link module:ui/editableui/editableuiview~EditableUIView}\n\t * will create it. Otherwise, the existing element will be used.\n\t */\n constructor(locale, editingView, editableElement) {\n super(locale, editingView, editableElement);\n this.extendTemplate({\n attributes: {\n role: 'textbox',\n class: 'ck-editor__editable_inline'\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n const editingView = this._editingView;\n const t = this.t;\n editingView.change(writer => {\n const viewRoot = editingView.document.getRoot(this.name);\n writer.setAttribute('aria-label', t('bu', [this.name]), viewRoot);\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/editableui/editableuiview\n */\n\nimport View from '../view';\n\n/**\n * The editable UI view class.\n *\n * @extends module:ui/view~View\n */\nexport default class EditableUIView extends View {\n\t/**\n\t * Creates an instance of EditableUIView class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance the editable is related to.\n\t * @param {HTMLElement} [editableElement] The editable element. If not specified, this view\n\t * should create it. Otherwise, the existing element should be used.\n\t */\n\tconstructor( locale, editingView, editableElement ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-content',\n\t\t\t\t\t'ck-editor__editable',\n\t\t\t\t\t'ck-rounded-corners'\n\t\t\t\t],\n\t\t\t\tlang: locale.contentLanguage,\n\t\t\t\tdir: locale.contentLanguageDirection\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * The name of the editable UI view.\n\t\t *\n\t\t * @member {String} #name\n\t\t */\n\t\tthis.name = null;\n\n\t\t/**\n\t\t * Controls whether the editable is focused, i.e. the user is typing in it.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The element which is the main editable element (usually the one with `contentEditable=\"true\"`).\n\t\t *\n\t\t * @private\n\t\t * @member {HTMLElement} #_editableElement\n\t\t */\n\t\tthis._editableElement = editableElement;\n\n\t\t/**\n\t\t * Whether an external {@link #_editableElement} was passed into the constructor, which also means\n\t\t * the view will not render its {@link #template}.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean} #_hasExternalElement\n\t\t */\n\t\tthis._hasExternalElement = !!this._editableElement;\n\n\t\t/**\n\t\t * The editing view instance the editable is related to. Editable uses the editing\n\t\t * view to dynamically modify its certain DOM attributes after {@link #render rendering}.\n\t\t *\n\t\t * **Note**: The DOM attributes are performed by the editing view and not UI\n\t\t * {@link module:ui/view~View#bindTemplate template bindings} because once rendered,\n\t\t * the editable DOM element must remain under the full control of the engine to work properly.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:engine/view/view~View} #isFocused\n\t\t */\n\t\tthis._editingView = editingView;\n\t}\n\n\t/**\n\t * Renders the view by either applying the {@link #template} to the existing\n\t * {@link #_editableElement} or assigning {@link #element} as {@link #_editableElement}.\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tif ( this._hasExternalElement ) {\n\t\t\tthis.template.apply( this.element = this._editableElement );\n\t\t} else {\n\t\t\tthis._editableElement = this.element;\n\t\t}\n\n\t\tthis.on( 'change:isFocused', () => this._updateIsFocusedClasses() );\n\t\tthis._updateIsFocusedClasses();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._hasExternalElement ) {\n\t\t\tthis.template.revert( this._editableElement );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n\n\t/**\n\t * Updates the `ck-focused` and `ck-blurred` CSS classes on the {@link #element} according to\n\t * the {@link #isFocused} property value using the {@link #_editingView editing view} API.\n\t *\n\t * @private\n\t */\n\t_updateIsFocusedClasses() {\n\t\tconst editingView = this._editingView;\n\n\t\tif ( editingView.isRenderingInProgress ) {\n\t\t\tupdateAfterRender( this );\n\t\t} else {\n\t\t\tupdate( this );\n\t\t}\n\n\t\tfunction update( view ) {\n\t\t\teditingView.change( writer => {\n\t\t\t\tconst viewRoot = editingView.document.getRoot( view.name );\n\n\t\t\t\twriter.addClass( view.isFocused ? 'ck-focused' : 'ck-blurred', viewRoot );\n\t\t\t\twriter.removeClass( view.isFocused ? 'ck-blurred' : 'ck-focused', viewRoot );\n\t\t\t} );\n\t\t}\n\n\t\t// In a case of a multi-root editor, a callback will be attached more than once (one callback for each root).\n\t\t// While executing one callback the `isRenderingInProgress` observable is changing what causes executing another\n\t\t// callback and render is called inside the already pending render.\n\t\t// We need to be sure that callback is executed only when the value has changed from `true` to `false`.\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/1676.\n\t\tfunction updateAfterRender( view ) {\n\t\t\teditingView.once( 'change:isRenderingInProgress', ( evt, name, value ) => {\n\t\t\t\tif ( !value ) {\n\t\t\t\t\tupdate( view );\n\t\t\t\t} else {\n\t\t\t\t\tupdateAfterRender( view );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/tounit\n */\n\n/**\n * Returns a helper function, which adds a desired trailing\n * `unit` to the passed value.\n *\n * @param {String} unit An unit like \"px\" or \"em\".\n * @returns {module:utils/dom/tounit~helper}\n */\nexport default function toUnit( unit ) {\n\t/**\n\t * A function, which adds a pre–defined trailing `unit`\n\t * to the passed `value`.\n\t *\n\t * @function helper\n \t * @param {*} value A value to be given the unit.\n \t * @returns {String} A value with the trailing unit.\n\t */\n\treturn value => value + unit;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/panel/sticky/stickypanelview\n */\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport View from '../../view';\nimport Template from '../../template';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\n\nimport '../../../theme/components/panel/stickypanel.css';\n\nconst toPx = toUnit( 'px' );\n\n/**\n * The sticky panel view class.\n */\nexport default class StickyPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the sticky panel should be active.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isActive\n\t\t */\n\t\tthis.set( 'isActive', false );\n\n\t\t/**\n\t\t * Controls whether the sticky panel is in the \"sticky\" state.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isSticky\n\t\t */\n\t\tthis.set( 'isSticky', false );\n\n\t\t/**\n\t\t * The limiter element for the sticky panel instance. Its bounding rect limits\n\t\t * the \"stickyness\" of the panel, i.e. when the panel reaches the bottom\n\t\t * edge of the limiter, it becomes sticky to that edge and does not float\n\t\t * off the limiter. It is mandatory for the panel to work properly and once\n\t\t * set, it cannot be changed.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {HTMLElement} #limiterElement\n\t\t */\n\t\tthis.set( 'limiterElement', null );\n\n\t\t/**\n\t\t * The offset from the bottom edge of {@link #limiterElement}\n\t\t * which stops the panel from stickying any further to prevent limiter's content\n\t\t * from being completely covered.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @default 50\n\t\t * @member {Number} #limiterBottomOffset\n\t\t */\n\t\tthis.set( 'limiterBottomOffset', 50 );\n\n\t\t/**\n\t\t * The offset from the top edge of the web browser's viewport which makes the\n\t\t * panel become sticky. The default value is `0`, which means the panel becomes\n\t\t * sticky when it's upper edge touches the top of the page viewport.\n\t\t *\n\t\t * This attribute is useful when the web page has UI elements positioned to the top\n\t\t * either using `position: fixed` or `position: sticky`, which would cover the\n\t\t * sticky panel or vice–versa (depending on the `z-index` hierarchy).\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #viewportTopOffset\n\t\t */\n\t\tthis.set( 'viewportTopOffset', 0 );\n\n\t\t/**\n\t\t * Controls the `margin-left` CSS style of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {String} #_marginLeft\n\t\t */\n\t\tthis.set( '_marginLeft', null );\n\n\t\t/**\n\t\t * Set `true` if the sticky panel reached the bottom edge of the\n\t\t * {@link #limiterElement}.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_isStickyToTheLimiter\n\t\t */\n\t\tthis.set( '_isStickyToTheLimiter', false );\n\n\t\t/**\n\t\t * Set `true` if the sticky panel uses the {@link #viewportTopOffset},\n\t\t * i.e. not {@link #_isStickyToTheLimiter} and the {@link #viewportTopOffset}\n\t\t * is not `0`.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_hasViewportTopOffset\n\t\t */\n\t\tthis.set( '_hasViewportTopOffset', false );\n\n\t\t/**\n\t\t * Collection of the child views which creates balloon panel contents.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.content = this.createCollection();\n\n\t\t/**\n\t\t * The DOM bounding client rect of the {@link module:ui/view~View#element} of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @member {Object} #_panelRect\n\t\t */\n\n\t\t/**\n\t\t * The DOM bounding client rect of the {@link #limiterElement}\n\t\t * of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @member {Object} #_limiterRect\n\t\t */\n\n\t\t/**\n\t\t * A dummy element which visually fills the space as long as the\n\t\t * actual panel is sticky. It prevents flickering of the UI.\n\t\t *\n\t\t * @protected\n\t\t * @property {HTMLElement}\n\t\t */\n\t\tthis._contentPanelPlaceholder = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel__placeholder'\n\t\t\t\t],\n\t\t\t\tstyle: {\n\t\t\t\t\tdisplay: bind.to( 'isSticky', isSticky => isSticky ? 'block' : 'none' ),\n\t\t\t\t\theight: bind.to( 'isSticky', isSticky => {\n\t\t\t\t\t\treturn isSticky ? toPx( this._panelRect.height ) : null;\n\t\t\t\t\t} )\n\t\t\t\t}\n\t\t\t}\n\t\t} ).render();\n\n\t\t/**\n\t\t * The panel which accepts children into {@link #content} collection.\n\t\t * Also an element which is positioned when {@link #isSticky}.\n\t\t *\n\t\t * @protected\n\t\t * @property {HTMLElement}\n\t\t */\n\t\tthis._contentPanel = new Template( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel__content',\n\t\t\t\t\t// Toggle class of the panel when \"sticky\" state changes in the view.\n\t\t\t\t\tbind.if( 'isSticky', 'ck-sticky-panel__content_sticky' ),\n\t\t\t\t\tbind.if( '_isStickyToTheLimiter', 'ck-sticky-panel__content_sticky_bottom-limit' ),\n\t\t\t\t],\n\t\t\t\tstyle: {\n\t\t\t\t\twidth: bind.to( 'isSticky', isSticky => {\n\t\t\t\t\t\treturn isSticky ? toPx( this._contentPanelPlaceholder.getBoundingClientRect().width ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\ttop: bind.to( '_hasViewportTopOffset', _hasViewportTopOffset => {\n\t\t\t\t\t\treturn _hasViewportTopOffset ? toPx( this.viewportTopOffset ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\tbottom: bind.to( '_isStickyToTheLimiter', _isStickyToTheLimiter => {\n\t\t\t\t\t\treturn _isStickyToTheLimiter ? toPx( this.limiterBottomOffset ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\tmarginLeft: bind.to( '_marginLeft' )\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tchildren: this.content\n\t\t} ).render();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel'\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis._contentPanelPlaceholder,\n\t\t\t\tthis._contentPanel\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Check if the panel should go into the sticky state immediately.\n\t\tthis._checkIfShouldBeSticky();\n\n\t\t// Update sticky state of the panel as the window is being scrolled.\n\t\tthis.listenTo( global.window, 'scroll', () => {\n\t\t\tthis._checkIfShouldBeSticky();\n\t\t} );\n\n\t\t// Synchronize with `model.isActive` because sticking an inactive panel is pointless.\n\t\tthis.listenTo( this, 'change:isActive', () => {\n\t\t\tthis._checkIfShouldBeSticky();\n\t\t} );\n\t}\n\n\t/**\n\t * Analyzes the environment to decide whether the panel should\n\t * be sticky or not.\n\t *\n\t * @protected\n\t */\n\t_checkIfShouldBeSticky() {\n\t\tconst panelRect = this._panelRect = this._contentPanel.getBoundingClientRect();\n\t\tlet limiterRect;\n\n\t\tif ( !this.limiterElement ) {\n\t\t\tthis.isSticky = false;\n\t\t} else {\n\t\t\tlimiterRect = this._limiterRect = this.limiterElement.getBoundingClientRect();\n\n\t\t\t// The panel must be active to become sticky.\n\t\t\tthis.isSticky = this.isActive &&\n\t\t\t\t// The limiter's top edge must be beyond the upper edge of the visible viewport (+the viewportTopOffset).\n\t\t\t\tlimiterRect.top < this.viewportTopOffset &&\n\t\t\t\t// The model#limiterElement's height mustn't be smaller than the panel's height and model#limiterBottomOffset.\n\t\t\t\t// There's no point in entering the sticky mode if the model#limiterElement is very, very small, because\n\t\t\t\t// it would immediately set model#_isStickyToTheLimiter true and, given model#limiterBottomOffset, the panel\n\t\t\t\t// would be positioned before the model#limiterElement.\n\t\t\t\tthis._panelRect.height + this.limiterBottomOffset < limiterRect.height;\n\t\t}\n\n\t\t// Stick the panel to the top edge of the viewport simulating CSS position:sticky.\n\t\t// TODO: Possibly replaced by CSS in the future http://caniuse.com/#feat=css-sticky\n\t\tif ( this.isSticky ) {\n\t\t\tthis._isStickyToTheLimiter =\n\t\t\t\tlimiterRect.bottom < panelRect.height + this.limiterBottomOffset + this.viewportTopOffset;\n\t\t\tthis._hasViewportTopOffset = !this._isStickyToTheLimiter && !!this.viewportTopOffset;\n\t\t\tthis._marginLeft = this._isStickyToTheLimiter ? null : toPx( -global.window.scrollX );\n\t\t}\n\t\t// Detach the panel from the top edge of the viewport.\n\t\telse {\n\t\t\tthis._isStickyToTheLimiter = false;\n\t\t\tthis._hasViewportTopOffset = false;\n\t\t\tthis._marginLeft = null;\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/focuscycler\n */\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\n\n/**\n * A utility class that helps cycling over focusable {@link module:ui/view~View views} in a\n * {@link module:ui/viewcollection~ViewCollection} when the focus is tracked by the\n * {@link module:utils/focustracker~FocusTracker} instance. It helps implementing keyboard\n * navigation in HTML forms, toolbars, lists and the like.\n *\n * To work properly it requires:\n * * a collection of focusable (HTML `tabindex` attribute) views that implement the `focus()` method,\n * * an associated focus tracker to determine which view is focused.\n *\n * A simple cycler setup can look like this:\n *\n *\t\tconst focusables = new ViewCollection();\n *\t\tconst focusTracker = new FocusTracker();\n *\n *\t\t// Add focusable views to the focus tracker.\n *\t\tfocusTracker.add( ... );\n *\n * Then, the cycler can be used manually:\n *\n *\t\tconst cycler = new FocusCycler( { focusables, focusTracker } );\n *\n *\t\t// Will focus the first focusable view in #focusables.\n *\t\tcycler.focusFirst();\n *\n *\t\t// Will log the next focusable item in #focusables.\n *\t\tconsole.log( cycler.next );\n *\n * Alternatively, it can work side by side with the {@link module:utils/keystrokehandler~KeystrokeHandler}:\n *\n *\t\tconst keystrokeHandler = new KeystrokeHandler();\n *\n *\t\t// Activate the keystroke handler.\n *\t\tkeystrokeHandler.listenTo( sourceOfEvents );\n *\n *\t\tconst cycler = new FocusCycler( {\n *\t\t\tfocusables, focusTracker, keystrokeHandler,\n *\t\t\tactions: {\n *\t\t\t\t// When arrowup of arrowleft is detected by the #keystrokeHandler,\n *\t\t\t\t// focusPrevious() will be called on the cycler.\n *\t\t\t\tfocusPrevious: [ 'arrowup', 'arrowleft' ],\n *\t\t\t}\n *\t\t} );\n */\nexport default class FocusCycler {\n\t/**\n\t * Creates an instance of the focus cycler utility.\n\t *\n\t * @param {Object} options Configuration options.\n\t * @param {module:utils/collection~Collection|Object} options.focusables\n\t * @param {module:utils/focustracker~FocusTracker} options.focusTracker\n\t * @param {module:utils/keystrokehandler~KeystrokeHandler} [options.keystrokeHandler]\n\t * @param {Object} [options.actions]\n\t */\n\tconstructor( options ) {\n\t\tObject.assign( this, options );\n\n\t\t/**\n\t\t * A {@link module:ui/view~View view} collection that the cycler operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/collection~Collection} #focusables\n\t\t */\n\n\t\t/**\n\t\t * A focus tracker instance that the cycler uses to determine the current focus\n\t\t * state in {@link #focusables}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker} #focusTracker\n\t\t */\n\n\t\t/**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}\n\t\t * which can respond to certain keystrokes and cycle the focus.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler} #keystrokeHandler\n\t\t */\n\n\t\t/**\n\t\t * Actions that the cycler can take when a keystroke is pressed. Requires\n\t\t * `options.keystrokeHandler` to be passed and working. When an action is\n\t\t * performed, `preventDefault` and `stopPropagation` will be called on the event\n\t\t * the keystroke fired in the DOM.\n\t\t *\n\t\t *\t\tactions: {\n\t\t *\t\t\t// Will call #focusPrevious() when arrowleft or arrowup is pressed.\n\t\t *\t\t\tfocusPrevious: [ 'arrowleft', 'arrowup' ],\n\t\t *\n\t\t *\t\t\t// Will call #focusNext() when arrowdown is pressed.\n\t\t *\t\t\tfocusNext: 'arrowdown'\n\t\t *\t\t}\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object} #actions\n\t\t */\n\n\t\tif ( options.actions && options.keystrokeHandler ) {\n\t\t\tfor ( const methodName in options.actions ) {\n\t\t\t\tlet actions = options.actions[ methodName ];\n\n\t\t\t\tif ( typeof actions == 'string' ) {\n\t\t\t\t\tactions = [ actions ];\n\t\t\t\t}\n\n\t\t\t\tfor ( const keystroke of actions ) {\n\t\t\t\t\toptions.keystrokeHandler.set( keystroke, ( data, cancel ) => {\n\t\t\t\t\t\tthis[ methodName ]();\n\t\t\t\t\t\tcancel();\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns the first focusable view in {@link #focusables}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #first\n\t */\n\tget first() {\n\t\treturn this.focusables.find( isFocusable ) || null;\n\t}\n\n\t/**\n\t * Returns the last focusable view in {@link #focusables}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #last\n\t */\n\tget last() {\n\t\treturn this.focusables.filter( isFocusable ).slice( -1 )[ 0 ] || null;\n\t}\n\n\t/**\n\t * Returns the next focusable view in {@link #focusables} based on {@link #current}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #next\n\t */\n\tget next() {\n\t\treturn this._getFocusableItem( 1 );\n\t}\n\n\t/**\n\t * Returns the previous focusable view in {@link #focusables} based on {@link #current}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #previous\n\t */\n\tget previous() {\n\t\treturn this._getFocusableItem( -1 );\n\t}\n\n\t/**\n\t * An index of the view in the {@link #focusables} which is focused according\n\t * to {@link #focusTracker}. Returns `null` when there is no such view.\n\t *\n\t * @readonly\n\t * @member {Number|null} #current\n\t */\n\tget current() {\n\t\tlet index = null;\n\n\t\t// There's no focused view in the focusables.\n\t\tif ( this.focusTracker.focusedElement === null ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tthis.focusables.find( ( view, viewIndex ) => {\n\t\t\tconst focused = view.element === this.focusTracker.focusedElement;\n\n\t\t\tif ( focused ) {\n\t\t\t\tindex = viewIndex;\n\t\t\t}\n\n\t\t\treturn focused;\n\t\t} );\n\n\t\treturn index;\n\t}\n\n\t/**\n\t * Focuses the {@link #first} item in {@link #focusables}.\n\t */\n\tfocusFirst() {\n\t\tthis._focus( this.first );\n\t}\n\n\t/**\n\t * Focuses the {@link #last} item in {@link #focusables}.\n\t */\n\tfocusLast() {\n\t\tthis._focus( this.last );\n\t}\n\n\t/**\n\t * Focuses the {@link #next} item in {@link #focusables}.\n\t */\n\tfocusNext() {\n\t\tthis._focus( this.next );\n\t}\n\n\t/**\n\t * Focuses the {@link #previous} item in {@link #focusables}.\n\t */\n\tfocusPrevious() {\n\t\tthis._focus( this.previous );\n\t}\n\n\t/**\n\t * Focuses the given view if it exists.\n\t *\n\t * @protected\n\t * @param {module:ui/view~View} view\n\t */\n\t_focus( view ) {\n\t\tif ( view ) {\n\t\t\tview.focus();\n\t\t}\n\t}\n\n\t/**\n\t * Returns the next or previous focusable view in {@link #focusables} with respect\n\t * to {@link #current}.\n\t *\n\t * @protected\n\t * @param {Number} step Either `1` for checking forward from {@link #current} or\n\t * `-1` for checking backwards.\n\t * @returns {module:ui/view~View|null}\n\t */\n\t_getFocusableItem( step ) {\n\t\t// Cache for speed.\n\t\tconst current = this.current;\n\t\tconst collectionLength = this.focusables.length;\n\n\t\tif ( !collectionLength ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Start from the beginning if no view is focused.\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/206\n\t\tif ( current === null ) {\n\t\t\treturn this[ step === 1 ? 'first' : 'last' ];\n\t\t}\n\n\t\t// Cycle in both directions.\n\t\tlet index = ( current + collectionLength + step ) % collectionLength;\n\n\t\tdo {\n\t\t\tconst view = this.focusables.get( index );\n\n\t\t\t// TODO: Check if view is visible.\n\t\t\tif ( isFocusable( view ) ) {\n\t\t\t\treturn view;\n\t\t\t}\n\n\t\t\t// Cycle in both directions.\n\t\t\tindex = ( index + collectionLength + step ) % collectionLength;\n\t\t} while ( index !== current );\n\n\t\treturn null;\n\t}\n}\n\n// Checks whether a view is focusable.\n//\n// @private\n// @param {module:ui/view~View} view A view to be checked.\n// @returns {Boolean}\nfunction isFocusable( view ) {\n\treturn !!( view.focus && global.window.getComputedStyle( view.element ).display != 'none' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/toolbarseparatorview\n */\n\nimport View from '../view';\n\n/**\n * The toolbar separator view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ToolbarSeparatorView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-toolbar__separator'\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getresizeobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport mix from '../mix';\nimport global from './global';\nimport Rect from './rect';\nimport DomEmitterMixin from './emittermixin';\n\nconst RESIZE_CHECK_INTERVAL = 100;\n\n/**\n * Returns an instance of [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver).\n * In browsers that support the `ResizeObserver` API, the native observer instance is returned.\n * In other browsers, a polyfilled instance is returned instead with a compatible API.\n *\n * [Learn more](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) about the native API.\n *\n * @param {Function} callback A function called when any observed element was resized. Refer to the\n * native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API to\n * learn more.\n * @returns {module:utils/dom/getresizeobserver~ResizeObserver} An observer instance.\n */\nexport default function getResizeObserver( callback ) {\n\t// TODO: One day, the `ResizeObserver` API will be supported in all modern web browsers.\n\t// When it happens, this module will no longer make sense and should be removed and\n\t// the native implementation should be used across the project to save bytes.\n\t// Check out https://caniuse.com/#feat=resizeobserver.\n\tif ( typeof global.window.ResizeObserver === 'function' ) {\n\t\treturn new global.window.ResizeObserver( callback );\n\t} else {\n\t\treturn new ResizeObserverPolyfill( callback );\n\t}\n}\n\n/**\n * A polyfill class for the native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver).\n *\n * @private\n * @mixes module:utils/domemittermixin~DomEmitterMixin\n */\nclass ResizeObserverPolyfill {\n\t/**\n\t * Creates an instance of the {@link module:utils/dom/getresizeobserver~ResizeObserverPolyfill} class.\n\t *\n\t * It synchronously reacts to resize of the window to check if observed elements' geometry changed.\n\t *\n\t * Additionally, the polyfilled observer uses a timeout to check if observed elements' geometry has changed\n\t * in some other way (dynamic layouts, scrollbars showing up, etc.), so its response can also be asynchronous.\n\t *\n\t * @param {Function} callback A function called when any observed element was resized. Refer to the\n\t * native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API to\n\t * learn more.\n\t */\n\tconstructor( callback ) {\n\t\t/**\n\t\t * A function called when any observed {@link #_elements element} was resized.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Function}\n\t\t */\n\t\tthis._callback = callback;\n\n\t\t/**\n\t\t * DOM elements currently observed by the observer instance.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Cached DOM {@link #_elements elements} bounding rects to compare to upon the next check.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.<HTMLElement,module:utils/dom/rect~Rect>}\n\t\t */\n\t\tthis._previousRects = new Map();\n\n\t\t/**\n\t\t * An UID of the current timeout upon which the observed elements rects\n\t\t * will be compared to the {@link #_previousRects previous rects} from the past.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.<HTMLElement,module:utils/dom/rect~Rect>}\n\t\t */\n\t\tthis._periodicCheckTimeout = null;\n\t}\n\n\t/**\n\t * Starts observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/observe).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tobserve( element ) {\n\t\tthis._elements.add( element );\n\n\t\tif ( this._elements.size === 1 ) {\n\t\t\tthis._startPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * Stops observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/unobserve).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tunobserve( element ) {\n\t\tthis._elements.delete( element );\n\t\tthis._previousRects.delete( element );\n\n\t\tif ( !this._elements.size ) {\n\t\t\tthis._stopPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * Stops observing all observed DOM elements.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/disconnect).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tdisconnect() {\n\t\tthis._elements.forEach( element => this.unobserve( element ) );\n\t}\n\n\t/**\n\t * When called, the observer calls the {@link #_callback resize callback} for all observed\n\t * {@link #_elements elements} but also starts checking periodically for changes in the elements' geometry.\n\t * If some are detected, {@link #_callback resize callback} is called for relevant elements that were resized.\n\t *\n\t * @protected\n\t */\n\t_startPeriodicCheck() {\n\t\tconst periodicCheck = () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t\tthis._periodicCheckTimeout = setTimeout( periodicCheck, RESIZE_CHECK_INTERVAL );\n\t\t};\n\n\t\tthis.listenTo( global.window, 'resize', () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t} );\n\n\t\tperiodicCheck();\n\t}\n\n\t/**\n\t * Stops checking for changes in all observed {@link #_elements elements} geometry.\n\t *\n\t * @protected\n\t */\n\t_stopPeriodicCheck() {\n\t\tclearTimeout( this._periodicCheckTimeout );\n\t\tthis.stopListening();\n\t\tthis._previousRects.clear();\n\t}\n\n\t/**\n\t * Checks if the geometry of any of the {@link #_elements element} has changed. If so, executes\n\t * the {@link #_callback resize callback} with element geometry data.\n\t *\n\t * @protected\n\t */\n\t_checkElementRectsAndExecuteCallback() {\n\t\tconst entries = [];\n\n\t\tfor ( const element of this._elements ) {\n\t\t\tif ( this._hasRectChanged( element ) ) {\n\t\t\t\tentries.push( {\n\t\t\t\t\ttarget: element,\n\t\t\t\t\tcontentRect: this._previousRects.get( element )\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\tif ( entries.length ) {\n\t\t\tthis._callback( entries );\n\t\t}\n\t}\n\n\t/**\n\t * Compares the DOM element geometry to the {@link #_previousRects cached geometry} from the past.\n\t * Returns `true` if geometry has changed or the element is checked for the first time.\n\t *\n\t * @protected\n\t * @param {HTMLElement} element\n\t * @returns {Boolean}\n\t */\n\t_hasRectChanged( element ) {\n\t\tif ( !element.ownerDocument.body.contains( element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst currentRect = new Rect( element );\n\t\tconst previousRect = this._previousRects.get( element );\n\n\t\t// The first check should always yield true despite no Previous rect to compare to.\n\t\t// The native ResizeObserver does that and... that makes sense. Sort of.\n\t\tconst hasChanged = !previousRect || !previousRect.isEqual( currentRect );\n\n\t\tthis._previousRects.set( element, currentRect );\n\n\t\treturn hasChanged;\n\t}\n}\n\nmix( ResizeObserverPolyfill, DomEmitterMixin );\n\n/**\n * A resize observer object (either native or {@link module:utils/dom/getresizeobserver~getResizeObserver polyfilled})\n * offering the [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API.\n *\n * @typedef {Function} module:utils/dom/getresizeobserver~ResizeObserver\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/dropdownpanelview\n */\n\nimport View from '../view';\n\n/**\n * The dropdown panel view class.\n *\n * See {@link module:ui/dropdown/dropdownview~DropdownView} to learn about the common usage.\n *\n * @extends module:ui/view~View\n */\nexport default class DropdownPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the panel is visible.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isVisible\n\t\t */\n\t\tthis.set( 'isVisible', false );\n\n\t\t/**\n\t\t * The position of the panel, relative to the parent.\n\t\t *\n\t\t * This property is reflected in the CSS class set to {@link #element} that controls\n\t\t * the position of the panel.\n\t\t *\n\t\t * @observable\n\t\t * @default 'se'\n\t\t * @member {'se'|'sw'|'ne'|'nw'} #position\n\t\t */\n\t\tthis.set( 'position', 'se' );\n\n\t\t/**\n\t\t * Collection of the child views in this panel.\n\t\t *\n\t\t * A common child type is the {@link module:ui/list/listview~ListView} and {@link module:ui/toolbar/toolbarview~ToolbarView}.\n\t\t * See {@link module:ui/dropdown/utils~addListToDropdown} and\n\t\t * {@link module:ui/dropdown/utils~addToolbarToDropdown} to learn more about child views of dropdowns.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset',\n\t\t\t\t\t'ck-dropdown__panel',\n\t\t\t\t\tbind.to( 'position', value => `ck-dropdown__panel_${ value }` ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-dropdown__panel-visible' )\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.children,\n\n\t\t\ton: {\n\t\t\t\t// Drag and drop in the panel should not break the selection in the editor.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/228\n\t\t\t\tselectstart: bind.to( evt => evt.preventDefault() )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the view element or first item in view collection on opening dropdown's panel.\n\t *\n\t * See also {@link module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable}.\n\t */\n\tfocus() {\n\t\tif ( this.children.length ) {\n\t\t\tthis.children.first.focus();\n\t\t}\n\t}\n\n\t/**\n\t * Focuses the view element or last item in view collection on opening dropdown's panel.\n\t *\n\t * See also {@link module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable}.\n\t */\n\tfocusLast() {\n\t\tif ( this.children.length ) {\n\t\t\tconst lastChild = this.children.last;\n\n\t\t\tif ( typeof lastChild.focusLast === 'function' ) {\n\t\t\t\tlastChild.focusLast();\n\t\t\t} else {\n\t\t\t\tlastChild.focus();\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/position\n */\n\nimport global from './global';\nimport Rect from './rect';\nimport getPositionedAncestor from './getpositionedancestor';\nimport getBorderWidths from './getborderwidths';\nimport { isFunction } from 'lodash-es';\n\n/**\n * Calculates the `position: absolute` coordinates of a given element so it can be positioned with respect to the\n * target in the visually most efficient way, taking various restrictions like viewport or limiter geometry\n * into consideration.\n *\n *\t\t// The element which is to be positioned.\n *\t\tconst element = document.body.querySelector( '#toolbar' );\n *\n *\t\t// A target to which the element is positioned relatively.\n *\t\tconst target = document.body.querySelector( '#container' );\n *\n *\t\t// Finding the optimal coordinates for the positioning.\n *\t\tconst { left, top, name } = getOptimalPosition( {\n *\t\t\telement: element,\n *\t\t\ttarget: target,\n *\n * \t\t\t// The algorithm will chose among these positions to meet the requirements such\n * \t\t\t// as \"limiter\" element or \"fitInViewport\", set below. The positions are considered\n * \t\t\t// in the order of the array.\n *\t\t\tpositions: [\n *\t\t\t\t//\n *\t\t\t \t//\t[ Target ]\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t| Element |\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\n *\t\t\t\ttargetRect => ( {\n *\t\t\t\t\ttop: targetRect.bottom,\n *\t\t\t\t\tleft: targetRect.left,\n *\t\t\t\t\tname: 'mySouthEastPosition'\n *\t\t\t\t} ),\n *\n *\t\t\t\t//\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t| Element |\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t[ Target ]\n *\t\t\t\t//\n *\t\t\t\t( targetRect, elementRect ) => ( {\n *\t\t\t\t\ttop: targetRect.top - elementRect.height,\n *\t\t\t\t\tleft: targetRect.left,\n *\t\t\t\t\tname: 'myNorthEastPosition'\n *\t\t\t\t} )\n *\t\t\t],\n *\n *\t\t\t// Find a position such guarantees the element remains within visible boundaries of <body>.\n *\t\t\tlimiter: document.body,\n *\n *\t\t\t// Find a position such guarantees the element remains within visible boundaries of the browser viewport.\n *\t\t\tfitInViewport: true\n *\t\t} );\n *\n *\t\t// The best position which fits into document.body and the viewport. May be useful\n *\t\t// to set proper class on the `element`.\n *\t\tconsole.log( name ); // -> \"myNorthEastPosition\"\n *\n *\t\t// Using the absolute coordinates which has been found to position the element\n *\t\t// as in the diagram depicting the \"myNorthEastPosition\" position.\n *\t\telement.style.top = top;\n *\t\telement.style.left = left;\n *\n * @param {module:utils/dom/position~Options} options Positioning options object.\n * @returns {module:utils/dom/position~Position}\n */\nexport function getOptimalPosition( { element, target, positions, limiter, fitInViewport } ) {\n\t// If the {@link module:utils/dom/position~Options#target} is a function, use what it returns.\n\t// https://github.com/ckeditor/ckeditor5-utils/issues/157\n\tif ( isFunction( target ) ) {\n\t\ttarget = target();\n\t}\n\n\t// If the {@link module:utils/dom/position~Options#limiter} is a function, use what it returns.\n\t// https://github.com/ckeditor/ckeditor5-ui/issues/260\n\tif ( isFunction( limiter ) ) {\n\t\tlimiter = limiter();\n\t}\n\n\tconst positionedElementAncestor = getPositionedAncestor( element.parentElement );\n\tconst elementRect = new Rect( element );\n\tconst targetRect = new Rect( target );\n\n\tlet bestPosition;\n\tlet name;\n\n\t// If there are no limits, just grab the very first position and be done with that drama.\n\tif ( !limiter && !fitInViewport ) {\n\t\t[ name, bestPosition ] = getPosition( positions[ 0 ], targetRect, elementRect );\n\t} else {\n\t\tconst limiterRect = limiter && new Rect( limiter ).getVisible();\n\t\tconst viewportRect = fitInViewport && new Rect( global.window );\n\n\t\t[ name, bestPosition ] =\n\t\t\tgetBestPosition( positions, targetRect, elementRect, limiterRect, viewportRect ) ||\n\t\t\t// If there's no best position found, i.e. when all intersections have no area because\n\t\t\t// rects have no width or height, then just use the first available position.\n\t\t\tgetPosition( positions[ 0 ], targetRect, elementRect );\n\t}\n\n\tlet { left, top } = getAbsoluteRectCoordinates( bestPosition );\n\n\tif ( positionedElementAncestor ) {\n\t\tconst ancestorPosition = getAbsoluteRectCoordinates( new Rect( positionedElementAncestor ) );\n\t\tconst ancestorBorderWidths = getBorderWidths( positionedElementAncestor );\n\n\t\t// (https://github.com/ckeditor/ckeditor5-ui-default/issues/126)\n\t\t// If there's some positioned ancestor of the panel, then its `Rect` must be taken into\n\t\t// consideration. `Rect` is always relative to the viewport while `position: absolute` works\n\t\t// with respect to that positioned ancestor.\n\t\tleft -= ancestorPosition.left;\n\t\ttop -= ancestorPosition.top;\n\n\t\t// (https://github.com/ckeditor/ckeditor5-utils/issues/139)\n\t\t// If there's some positioned ancestor of the panel, not only its position must be taken into\n\t\t// consideration (see above) but also its internal scrolls. Scroll have an impact here because `Rect`\n\t\t// is relative to the viewport (it doesn't care about scrolling), while `position: absolute`\n\t\t// must compensate that scrolling.\n\t\tleft += positionedElementAncestor.scrollLeft;\n\t\ttop += positionedElementAncestor.scrollTop;\n\n\t\t// (https://github.com/ckeditor/ckeditor5-utils/issues/139)\n\t\t// If there's some positioned ancestor of the panel, then its `Rect` includes its CSS `borderWidth`\n\t\t// while `position: absolute` positioning does not consider it.\n\t\t// E.g. `{ position: absolute, top: 0, left: 0 }` means upper left corner of the element,\n\t\t// not upper-left corner of its border.\n\t\tleft -= ancestorBorderWidths.left;\n\t\ttop -= ancestorBorderWidths.top;\n\t}\n\n\treturn { left, top, name };\n}\n\n// For given position function, returns a corresponding `Rect` instance.\n//\n// @private\n// @param {Function} position A function returning {@link module:utils/dom/position~Position}.\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of positioned element.\n// @returns {Array} An array containing position name and its Rect.\nfunction getPosition( position, targetRect, elementRect ) {\n\tconst { left, top, name } = position( targetRect, elementRect );\n\n\treturn [ name, elementRect.clone().moveTo( left, top ) ];\n}\n\n// For a given array of positioning functions, returns such that provides the best\n// fit of the `elementRect` into the `limiterRect` and `viewportRect`.\n//\n// @private\n// @param {module:utils/dom/position~Options#positions} positions Functions returning\n// {@link module:utils/dom/position~Position} to be checked, in the order of preference.\n// @param {utils/dom/rect~Rect} targetRect A rect of the {@link module:utils/dom/position~Options#target}.\n// @param {utils/dom/rect~Rect} elementRect A rect of positioned {@link module:utils/dom/position~Options#element}.\n// @param {utils/dom/rect~Rect} limiterRect A rect of the {@link module:utils/dom/position~Options#limiter}.\n// @param {utils/dom/rect~Rect} viewportRect A rect of the viewport.\n// @returns {Array} An array containing the name of the position and it's rect.\nfunction getBestPosition( positions, targetRect, elementRect, limiterRect, viewportRect ) {\n\tlet maxLimiterIntersectArea = 0;\n\tlet maxViewportIntersectArea = 0;\n\tlet bestPositionRect;\n\tlet bestPositionName;\n\n\t// This is when element is fully visible.\n\tconst elementRectArea = elementRect.getArea();\n\n\tpositions.some( position => {\n\t\tconst [ positionName, positionRect ] = getPosition( position, targetRect, elementRect );\n\t\tlet limiterIntersectArea;\n\t\tlet viewportIntersectArea;\n\n\t\tif ( limiterRect ) {\n\t\t\tif ( viewportRect ) {\n\t\t\t\t// Consider only the part of the limiter which is visible in the viewport. So the limiter is getting limited.\n\t\t\t\tconst limiterViewportIntersectRect = limiterRect.getIntersection( viewportRect );\n\n\t\t\t\tif ( limiterViewportIntersectRect ) {\n\t\t\t\t\t// If the limiter is within the viewport, then check the intersection between that part of the\n\t\t\t\t\t// limiter and actual position.\n\t\t\t\t\tlimiterIntersectArea = limiterViewportIntersectRect.getIntersectionArea( positionRect );\n\t\t\t\t} else {\n\t\t\t\t\tlimiterIntersectArea = 0;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tlimiterIntersectArea = limiterRect.getIntersectionArea( positionRect );\n\t\t\t}\n\t\t}\n\n\t\tif ( viewportRect ) {\n\t\t\tviewportIntersectArea = viewportRect.getIntersectionArea( positionRect );\n\t\t}\n\n\t\t// The only criterion: intersection with the viewport.\n\t\tif ( viewportRect && !limiterRect ) {\n\t\t\tif ( viewportIntersectArea > maxViewportIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\t\t// The only criterion: intersection with the limiter.\n\t\telse if ( !viewportRect && limiterRect ) {\n\t\t\tif ( limiterIntersectArea > maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\t\t// Two criteria: intersection with the viewport and the limiter visible in the viewport.\n\t\telse {\n\t\t\tif ( viewportIntersectArea > maxViewportIntersectArea && limiterIntersectArea >= maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t} else if ( viewportIntersectArea >= maxViewportIntersectArea && limiterIntersectArea > maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\n\t\tfunction setBestPosition() {\n\t\t\tmaxViewportIntersectArea = viewportIntersectArea;\n\t\t\tmaxLimiterIntersectArea = limiterIntersectArea;\n\t\t\tbestPositionRect = positionRect;\n\t\t\tbestPositionName = positionName;\n\t\t}\n\n\t\t// If a such position is found that element is fully container by the limiter then, obviously,\n\t\t// there will be no better one, so finishing.\n\t\treturn limiterIntersectArea === elementRectArea;\n\t} );\n\n\treturn bestPositionRect ? [ bestPositionName, bestPositionRect ] : null;\n}\n\n// DOMRect (also Rect) works in a scroll–independent geometry but `position: absolute` doesn't.\n// This function converts Rect to `position: absolute` coordinates.\n//\n// @private\n// @param {utils/dom/rect~Rect} rect A rect to be converted.\n// @returns {Object} Object containing `left` and `top` properties, in absolute coordinates.\nfunction getAbsoluteRectCoordinates( { left, top } ) {\n\tconst { scrollX, scrollY } = global.window;\n\n\treturn {\n\t\tleft: left + scrollX,\n\t\ttop: top + scrollY,\n\t};\n}\n\n/**\n * The `getOptimalPosition` helper options.\n *\n * @interface module:utils/dom/position~Options\n */\n\n/**\n * Element that is to be positioned.\n *\n * @member {HTMLElement} #element\n */\n\n/**\n * Target with respect to which the `element` is to be positioned.\n *\n * @member {HTMLElement|Range|ClientRect|Rect|Function} #target\n */\n\n/**\n * An array of functions which return {@link module:utils/dom/position~Position} relative\n * to the `target`, in the order of preference.\n *\n * @member {Array.<Function>} #positions\n */\n\n/**\n * When set, the algorithm will chose position which fits the most in the\n * limiter's bounding rect.\n *\n * @member {HTMLElement|Range|ClientRect|Rect|Function} #limiter\n */\n\n/**\n * When set, the algorithm will chose such a position which fits `element`\n * the most inside visible viewport.\n *\n * @member {Boolean} #fitInViewport\n */\n\n/**\n * An object describing a position in `position: absolute` coordinate\n * system, along with position name.\n *\n * @typedef {Object} module:utils/dom/position~Position\n *\n * @property {Number} top Top position offset.\n * @property {Number} left Left position offset.\n * @property {String} name Name of the position.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getpositionedancestor\n */\n\nimport global from './global';\n\n/**\n * For a given element, returns the nearest ancestor element which CSS position is not \"static\".\n *\n * @param {HTMLElement} element The native DOM element to be checked.\n * @returns {HTMLElement|null}\n */\nexport default function getPositionedAncestor( element ) {\n\twhile ( element && element.tagName.toLowerCase() != 'html' ) {\n\t\tif ( global.window.getComputedStyle( element ).position != 'static' ) {\n\t\t\treturn element;\n\t\t}\n\n\t\telement = element.parentElement;\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/dropdownview\n */\n\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\nimport '../../theme/components/dropdown/dropdown.css';\n\nimport { getOptimalPosition } from '@ckeditor/ckeditor5-utils/src/dom/position';\n\n/**\n * The dropdown view class. It manages the dropdown button and dropdown panel.\n *\n * In most cases, the easiest way to create a dropdown is by using the {@link module:ui/dropdown/utils~createDropdown}\n * util:\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\tdropdown.panelView.element.textContent = 'Content of the panel';\n *\n *\t\t// Will render a dropdown with a panel containing a \"Content of the panel\" text.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * If you want to add a richer content to the dropdown panel, you can use the {@link module:ui/dropdown/utils~addListToDropdown}\n * and {@link module:ui/dropdown/utils~addToolbarToDropdown} helpers. See more examples in\n * {@link module:ui/dropdown/utils~createDropdown} documentation.\n *\n * If you want to create a completely custom dropdown, then you can compose it manually:\n *\n *\t\tconst button = new DropdownButtonView( locale );\n *\t\tconst panel = new DropdownPanelView( locale );\n *\t\tconst dropdown = new DropdownView( locale, button, panel );\n *\n *\t\tbutton.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\tpanel.element.textContent = 'Content of the panel';\n *\n *\t\t// Will render a dropdown with a panel containing a \"Content of the panel\" text.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * However, dropdown created this way will contain little behavior. You will need to implement handlers for actions\n * such as {@link module:ui/bindings/clickoutsidehandler~clickOutsideHandler clicking outside an open dropdown}\n * (which should close it) and support for arrow keys inside the panel. Therefore, unless you really know what\n * you do and you really need to do it, it is recommended to use the {@link module:ui/dropdown/utils~createDropdown} helper.\n *\n * @extends module:ui/view~View\n */\nexport default class DropdownView extends View {\n\t/**\n\t * Creates an instance of the dropdown.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t * @param {module:ui/dropdown/button/dropdownbutton~DropdownButton} buttonView\n\t * @param {module:ui/dropdown/dropdownpanelview~DropdownPanelView} panelView\n\t */\n\tconstructor( locale, buttonView, panelView ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Button of the dropdown view. Clicking the button opens the {@link #panelView}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/button/buttonview~ButtonView} #buttonView\n\t\t */\n\t\tthis.buttonView = buttonView;\n\n\t\t/**\n\t\t * Panel of the dropdown. It opens when the {@link #buttonView} is\n\t\t * {@link module:ui/button/buttonview~ButtonView#event:execute executed} (i.e. clicked).\n\t\t *\n\t\t * Child views can be added to the panel's `children` collection:\n\t\t *\n\t\t *\t\tdropdown.panelView.children.add( childView );\n\t\t *\n\t\t * See {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView#children} and\n\t\t * {@link module:ui/viewcollection~ViewCollection#add}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/dropdown/dropdownpanelview~DropdownPanelView} #panelView\n\t\t */\n\t\tthis.panelView = panelView;\n\n\t\t/**\n\t\t * Controls whether the dropdown view is open, i.e. shows or hides the {@link #panelView panel}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isOpen\n\t\t */\n\t\tthis.set( 'isOpen', false );\n\n\t\t/**\n\t\t * Controls whether the dropdown is enabled, i.e. it can be clicked and execute an action.\n\t\t *\n\t\t * See {@link module:ui/button/buttonview~ButtonView#isEnabled}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', true );\n\n\t\t/**\n\t\t * (Optional) The additional CSS class set on the dropdown {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n\t\tthis.set( 'class' );\n\n\t\t/**\n\t\t * The position of the panel, relative to the dropdown.\n\t\t *\n\t\t * **Note**: When `'auto'`, the panel will use one of the remaining positions to stay\n\t\t * in the viewport, visible to the user. The positions correspond directly to\n\t\t * {@link module:ui/dropdown/dropdownview~DropdownView.defaultPanelPositions default panel positions}.\n\t\t *\n\t\t * **Note**: This value has an impact on the\n\t\t * {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView#position} property\n\t\t * each time the panel becomes {@link #isOpen open}.\n\t\t *\n\t\t * @observable\n\t\t * @default 'auto'\n\t\t * @member {'auto'|'se'|'sw'|'ne'|'nw'} #panelPosition\n\t\t */\n\t\tthis.set( 'panelPosition', 'auto' );\n\n\t\t/**\n\t\t * Tracks information about DOM focus in the dropdown.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}. It manages\n\t\t * keystrokes of the dropdown:\n\t\t *\n\t\t * * <kbd>▼</kbd> opens the dropdown,\n\t\t * * <kbd>◀</kbd> and <kbd>Esc</kbd> closes the dropdown.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new KeystrokeHandler();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-dropdown',\n\t\t\t\t\tbind.to( 'class' ),\n\t\t\t\t\tbind.if( 'isEnabled', 'ck-disabled', value => !value )\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\tbuttonView,\n\t\t\t\tpanelView\n\t\t\t]\n\t\t} );\n\n\t\tbuttonView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-dropdown__button',\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * A child {@link module:ui/list/listview~ListView list view} of the dropdown located\n\t\t * in its {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addListToDropdown}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/list/listview~ListView} #listView\n\t\t */\n\n\t\t/**\n\t\t * A child toolbar of the dropdown located in the\n\t\t * {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addToolbarToDropdown}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarView} #toolbarView\n\t\t */\n\n\t\t/**\n\t\t * Fired when the toolbar button or list item is executed.\n\t\t *\n\t\t * For {@link #listView} It fires when a child of some {@link module:ui/list/listitemview~ListItemView}\n\t\t * fired `execute`.\n\t\t *\n\t\t * For {@link #toolbarView} It fires when one of the buttons has been\n\t\t * {@link module:ui/button/buttonview~ButtonView#event:execute executed}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addListToDropdown}\n\t\t * or {@link module:ui/dropdown/utils~addToolbarToDropdown}.\n\t\t *\n\t\t * @event execute\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Toggle the dropdown when its button has been clicked.\n\t\tthis.listenTo( this.buttonView, 'open', () => {\n\t\t\tthis.isOpen = !this.isOpen;\n\t\t} );\n\n\t\t// Toggle the visibility of the panel when the dropdown becomes open.\n\t\tthis.panelView.bind( 'isVisible' ).to( this, 'isOpen' );\n\n\t\t// Let the dropdown control the position of the panel. The position must\n\t\t// be updated every time the dropdown is open.\n\t\tthis.on( 'change:isOpen', () => {\n\t\t\tif ( !this.isOpen ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If \"auto\", find the best position of the panel to fit into the viewport.\n\t\t\t// Otherwise, simply assign the static position.\n\t\t\tif ( this.panelPosition === 'auto' ) {\n\t\t\t\tthis.panelView.position = DropdownView._getOptimalPosition( {\n\t\t\t\t\telement: this.panelView.element,\n\t\t\t\t\ttarget: this.buttonView.element,\n\t\t\t\t\tfitInViewport: true,\n\t\t\t\t\tpositions: this._panelPositions\n\t\t\t\t} ).name;\n\t\t\t} else {\n\t\t\t\tthis.panelView.position = this.panelPosition;\n\t\t\t}\n\t\t} );\n\n\t\t// Listen for keystrokes coming from within #element.\n\t\tthis.keystrokes.listenTo( this.element );\n\n\t\t// Register #element in the focus tracker.\n\t\tthis.focusTracker.add( this.element );\n\n\t\tconst closeDropdown = ( data, cancel ) => {\n\t\t\tif ( this.isOpen ) {\n\t\t\t\tthis.buttonView.focus();\n\t\t\t\tthis.isOpen = false;\n\t\t\t\tcancel();\n\t\t\t}\n\t\t};\n\n\t\t// Open the dropdown panel using the arrow down key, just like with return or space.\n\t\tthis.keystrokes.set( 'arrowdown', ( data, cancel ) => {\n\t\t\t// Don't open if the dropdown is disabled or already open.\n\t\t\tif ( this.buttonView.isEnabled && !this.isOpen ) {\n\t\t\t\tthis.isOpen = true;\n\t\t\t\tcancel();\n\t\t\t}\n\t\t} );\n\n\t\t// Block the right arrow key (until nested dropdowns are implemented).\n\t\tthis.keystrokes.set( 'arrowright', ( data, cancel ) => {\n\t\t\tif ( this.isOpen ) {\n\t\t\t\tcancel();\n\t\t\t}\n\t\t} );\n\n\t\t// Close the dropdown using the arrow left/escape key.\n\t\tthis.keystrokes.set( 'arrowleft', closeDropdown );\n\t\tthis.keystrokes.set( 'esc', closeDropdown );\n\t}\n\n\t/**\n\t * Focuses the {@link #buttonView}.\n\t */\n\tfocus() {\n\t\tthis.buttonView.focus();\n\t}\n\n\t/**\n\t * Returns {@link #panelView panel} positions to be used by the\n\t * {@link module:utils/dom/position~getOptimalPosition `getOptimalPosition()`}\n\t * utility considering the direction of the language the UI of the editor is displayed in.\n\t *\n\t * @type {module:utils/dom/position~Options#positions}\n\t * @private\n\t */\n\tget _panelPositions() {\n\t\tconst { southEast, southWest, northEast, northWest } = DropdownView.defaultPanelPositions;\n\n\t\tif ( this.locale.uiLanguageDirection === 'ltr' ) {\n\t\t\treturn [ southEast, southWest, northEast, northWest ];\n\t\t} else {\n\t\t\treturn [ southWest, southEast, northWest, northEast ];\n\t\t}\n\t}\n}\n\n/**\n * A set of positioning functions used by the dropdown view to determine\n * the optimal position (i.e. fitting into the browser viewport) of its\n * {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel} when\n * {@link module:ui/dropdown/dropdownview~DropdownView#panelPosition} is set to 'auto'`.\n *\n * The available positioning functions are as follow:\n *\n * **South**\n *\n * * `southEast`\n *\n *\t\t[ Button ]\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\n * * `southWest`\n *\n *\t\t [ Button ]\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\n * **North**\n *\n * * `northEast`\n *\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\t\t[ Button ]\n *\n * * `northWest`\n *\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\t\t [ Button ]\n *\n * Positioning functions are compatible with {@link module:utils/dom/position~Position}.\n *\n * The name that position function returns will be reflected in dropdown panel's class that\n * controls its placement. See {@link module:ui/dropdown/dropdownview~DropdownView#panelPosition}\n * to learn more.\n *\n * @member {Object} module:ui/dropdown/dropdownview~DropdownView.defaultPanelPositions\n */\nDropdownView.defaultPanelPositions = {\n\tsouthEast: buttonRect => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom,\n\t\t\tleft: buttonRect.left,\n\t\t\tname: 'se'\n\t\t};\n\t},\n\tsouthWest: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom,\n\t\t\tleft: buttonRect.left - panelRect.width + buttonRect.width,\n\t\t\tname: 'sw'\n\t\t};\n\t},\n\tnorthEast: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.top - panelRect.height,\n\t\t\tleft: buttonRect.left,\n\t\t\tname: 'ne'\n\t\t};\n\t},\n\tnorthWest: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom - panelRect.height,\n\t\t\tleft: buttonRect.left - panelRect.width + buttonRect.width,\n\t\t\tname: 'nw'\n\t\t};\n\t}\n};\n\n/**\n * A function used to calculate the optimal position for the dropdown panel.\n *\n * @protected\n * @member {Function} module:ui/dropdown/dropdownview~DropdownView._getOptimalPosition\n */\nDropdownView._getOptimalPosition = getOptimalPosition;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* global DOMParser */\n\n/**\n * @module ui/icon/iconview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/icon/icon.css';\n\n/**\n * The icon view class.\n *\n * @extends module:ui/view~View\n */\nexport default class IconView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor() {\n\t\tsuper();\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * The SVG source of the icon.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #content\n\t\t */\n\t\tthis.set( 'content', '' );\n\n\t\t/**\n\t\t * This attribute specifies the boundaries to which the\n\t\t * icon content should stretch.\n\t\t *\n\t\t * @observable\n\t\t * @default '0 0 20 20'\n\t\t * @member {String} #viewBox\n\t\t */\n\t\tthis.set( 'viewBox', '0 0 20 20' );\n\n\t\t/**\n\t\t * The fill color of the child `path.ck-icon__fill`.\n\t\t *\n\t\t * @observable\n\t\t * @default ''\n\t\t * @member {String} #fillColor\n\t\t */\n\t\tthis.set( 'fillColor', '' );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'svg',\n\t\t\tns: 'http://www.w3.org/2000/svg',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-icon'\n\t\t\t\t],\n\t\t\t\tviewBox: bind.to( 'viewBox' )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis._updateXMLContent();\n\t\tthis._colorFillPaths();\n\n\t\t// This is a hack for lack of innerHTML binding.\n\t\t// See: https://github.com/ckeditor/ckeditor5-ui/issues/99.\n\t\tthis.on( 'change:content', () => {\n\t\t\tthis._updateXMLContent();\n\t\t\tthis._colorFillPaths();\n\t\t} );\n\n\t\tthis.on( 'change:fillColor', () => {\n\t\t\tthis._colorFillPaths();\n\t\t} );\n\t}\n\n\t/**\n\t * Updates the {@link #element} with the value of {@link #content}.\n\t *\n\t * @private\n\t */\n\t_updateXMLContent() {\n\t\tif ( this.content ) {\n\t\t\tconst parsed = new DOMParser().parseFromString( this.content.trim(), 'image/svg+xml' );\n\t\t\tconst svg = parsed.querySelector( 'svg' );\n\t\t\tconst viewBox = svg.getAttribute( 'viewBox' );\n\n\t\t\tif ( viewBox ) {\n\t\t\t\tthis.viewBox = viewBox;\n\t\t\t}\n\n\t\t\tthis.element.innerHTML = '';\n\n\t\t\twhile ( svg.childNodes.length > 0 ) {\n\t\t\t\tthis.element.appendChild( svg.childNodes[ 0 ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Fills all child `path.ck-icon__fill` with the `#fillColor`.\n\t *\n\t * @private\n\t */\n\t_colorFillPaths() {\n\t\tif ( this.fillColor ) {\n\t\t\tthis.element.querySelectorAll( '.ck-icon__fill' ).forEach( path => {\n\t\t\t\tpath.style.fill = this.fillColor;\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/tooltip/tooltipview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/tooltip/tooltip.css';\n\n/**\n * The tooltip view class.\n *\n * @extends module:ui/view~View\n */\nexport default class TooltipView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The text of the tooltip visible to the user.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #text\n\t\t */\n\t\tthis.set( 'text', '' );\n\n\t\t/**\n\t\t * The position of the tooltip (south or north).\n\t\t *\n\t\t *\t\t+-----------+\n\t\t *\t\t| north |\n\t\t *\t\t+-----------+\n\t\t *\t\t V\n\t\t *\t\t [element]\n\t\t *\n\t\t *\t\t [element]\n\t\t *\t\t ^\n\t\t *\t\t+-----------+\n\t\t *\t\t| south |\n\t\t *\t\t+-----------+\n\t\t *\n\t\t * @observable\n\t\t * @default 's'\n\t\t * @member {'s'|'n'} #position\n\t\t */\n\t\tthis.set( 'position', 's' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-tooltip',\n\t\t\t\t\tbind.to( 'position', position => 'ck-tooltip_' + position ),\n\t\t\t\t\tbind.if( 'text', 'ck-hidden', value => !value.trim() )\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'span',\n\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [\n\t\t\t\t\t\t\t'ck',\n\t\t\t\t\t\t\t'ck-tooltip__text'\n\t\t\t\t\t\t]\n\t\t\t\t\t},\n\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttext: bind.to( 'text' ),\n\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/button/buttonview\n */\n\nimport View from '../view';\nimport IconView from '../icon/iconview';\nimport TooltipView from '../tooltip/tooltipview';\n\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\nimport { getEnvKeystrokeText } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\nimport '../../theme/components/button/button.css';\n\n/**\n * The button view class.\n *\n *\t\tconst view = new ButtonView();\n *\n *\t\tview.set( {\n *\t\t\tlabel: 'A button',\n *\t\t\tkeystroke: 'Ctrl+B',\n *\t\t\ttooltip: true,\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * @extends module:ui/view~View\n * @implements module:ui/button/button~Button\n */\nexport default class ButtonView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\t\tconst ariaLabelUid = uid();\n\n\t\t// Implement the Button interface.\n\t\tthis.set( 'class' );\n\t\tthis.set( 'labelStyle' );\n\t\tthis.set( 'icon' );\n\t\tthis.set( 'isEnabled', true );\n\t\tthis.set( 'isOn', false );\n\t\tthis.set( 'isVisible', true );\n\t\tthis.set( 'isToggleable', false );\n\t\tthis.set( 'keystroke' );\n\t\tthis.set( 'label' );\n\t\tthis.set( 'tabindex', -1 );\n\t\tthis.set( 'tooltip' );\n\t\tthis.set( 'tooltipPosition', 's' );\n\t\tthis.set( 'type', 'button' );\n\t\tthis.set( 'withText', false );\n\t\tthis.set( 'withKeystroke', false );\n\n\t\t/**\n\t\t * Collection of the child views inside of the button {@link #element}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\t/**\n\t\t * Tooltip of the button view. It is configurable using the {@link #tooltip tooltip attribute}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/tooltip/tooltipview~TooltipView} #tooltipView\n\t\t */\n\t\tthis.tooltipView = this._createTooltipView();\n\n\t\t/**\n\t\t * Label of the button view. It is configurable using the {@link #label label attribute}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #labelView\n\t\t */\n\t\tthis.labelView = this._createLabelView( ariaLabelUid );\n\n\t\t/**\n\t\t * The icon view of the button. Will be added to {@link #children} when the\n\t\t * {@link #icon icon attribute} is defined.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/icon/iconview~IconView} #iconView\n\t\t */\n\t\tthis.iconView = new IconView();\n\n\t\tthis.iconView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-button__icon'\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * A view displaying the keystroke of the button next to the {@link #labelView label}.\n\t\t * Added to {@link #children} when the {@link #withKeystroke `withKeystroke` attribute}\n\t\t * is defined.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view/view~View} #keystrokeView\n\t\t */\n\t\tthis.keystrokeView = this._createKeystrokeView();\n\n\t\t/**\n\t\t * Tooltip of the button bound to the template.\n\t\t *\n\t\t * @see #tooltip\n\t\t * @see #_getTooltipString\n\t\t * @private\n\t\t * @observable\n\t\t * @member {Boolean} #_tooltipString\n\t\t */\n\t\tthis.bind( '_tooltipString' ).to(\n\t\t\tthis, 'tooltip',\n\t\t\tthis, 'label',\n\t\t\tthis, 'keystroke',\n\t\t\tthis._getTooltipString.bind( this )\n\t\t);\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'button',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button',\n\t\t\t\t\tbind.to( 'class' ),\n\t\t\t\t\tbind.if( 'isEnabled', 'ck-disabled', value => !value ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-hidden', value => !value ),\n\t\t\t\t\tbind.to( 'isOn', value => value ? 'ck-on' : 'ck-off' ),\n\t\t\t\t\tbind.if( 'withText', 'ck-button_with-text' ),\n\t\t\t\t\tbind.if( 'withKeystroke', 'ck-button_with-keystroke' ),\n\t\t\t\t],\n\t\t\t\ttype: bind.to( 'type', value => value ? value : 'button' ),\n\t\t\t\ttabindex: bind.to( 'tabindex' ),\n\t\t\t\t'aria-labelledby': `ck-editor__aria-label_${ ariaLabelUid }`,\n\t\t\t\t'aria-disabled': bind.if( 'isEnabled', true, value => !value ),\n\t\t\t\t'aria-pressed': bind.to( 'isOn', value => this.isToggleable ? String( value ) : false )\n\t\t\t},\n\n\t\t\tchildren: this.children,\n\n\t\t\ton: {\n\t\t\t\tmousedown: bind.to( evt => {\n\t\t\t\t\tevt.preventDefault();\n\t\t\t\t} ),\n\n\t\t\t\tclick: bind.to( evt => {\n\t\t\t\t\t// We can't make the button disabled using the disabled attribute, because it won't be focusable.\n\t\t\t\t\t// Though, shouldn't this condition be moved to the button controller?\n\t\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\t\tthis.fire( 'execute' );\n\t\t\t\t\t} else {\n\t\t\t\t\t\t// Prevent the default when button is disabled, to block e.g.\n\t\t\t\t\t\t// automatic form submitting. See ckeditor/ckeditor5-link#74.\n\t\t\t\t\t\tevt.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tif ( this.icon ) {\n\t\t\tthis.iconView.bind( 'content' ).to( this, 'icon' );\n\t\t\tthis.children.add( this.iconView );\n\t\t}\n\n\t\tthis.children.add( this.tooltipView );\n\t\tthis.children.add( this.labelView );\n\n\t\tif ( this.withKeystroke ) {\n\t\t\tthis.children.add( this.keystrokeView );\n\t\t}\n\t}\n\n\t/**\n\t * Focuses the {@link #element} of the button.\n\t */\n\tfocus() {\n\t\tthis.element.focus();\n\t}\n\n\t/**\n\t * Creates a {@link module:ui/tooltip/tooltipview~TooltipView} instance and binds it with button\n\t * attributes.\n\t *\n\t * @private\n\t * @returns {module:ui/tooltip/tooltipview~TooltipView}\n\t */\n\t_createTooltipView() {\n\t\tconst tooltipView = new TooltipView();\n\n\t\ttooltipView.bind( 'text' ).to( this, '_tooltipString' );\n\t\ttooltipView.bind( 'position' ).to( this, 'tooltipPosition' );\n\n\t\treturn tooltipView;\n\t}\n\n\t/**\n\t * Creates a label view instance and binds it with button attributes.\n\t *\n\t * @private\n\t * @param {String} ariaLabelUid The aria label UID.\n\t * @returns {module:ui/view~View}\n\t */\n\t_createLabelView( ariaLabelUid ) {\n\t\tconst labelView = new View();\n\t\tconst bind = this.bindTemplate;\n\n\t\tlabelView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__label'\n\t\t\t\t],\n\t\t\t\tstyle: bind.to( 'labelStyle' ),\n\t\t\t\tid: `ck-editor__aria-label_${ ariaLabelUid }`,\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: this.bindTemplate.to( 'label' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn labelView;\n\t}\n\n\t/**\n\t * Creates a view that displays a keystroke next to a {@link #labelView label }\n\t * and binds it with button attributes.\n\t *\n\t * @private\n\t * @returns {module:ui/view~View}\n\t */\n\t_createKeystrokeView() {\n\t\tconst keystrokeView = new View();\n\n\t\tkeystrokeView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__keystroke'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: this.bindTemplate.to( 'keystroke', text => getEnvKeystrokeText( text ) )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn keystrokeView;\n\t}\n\n\t/**\n\t * Gets the text for the {@link #tooltipView} from the combination of\n\t * {@link #tooltip}, {@link #label} and {@link #keystroke} attributes.\n\t *\n\t * @private\n\t * @see #tooltip\n\t * @see #_tooltipString\n\t * @param {Boolean|String|Function} tooltip Button tooltip.\n\t * @param {String} label Button label.\n\t * @param {String} keystroke Button keystroke.\n\t * @returns {String}\n\t */\n\t_getTooltipString( tooltip, label, keystroke ) {\n\t\tif ( tooltip ) {\n\t\t\tif ( typeof tooltip == 'string' ) {\n\t\t\t\treturn tooltip;\n\t\t\t} else {\n\t\t\t\tif ( keystroke ) {\n\t\t\t\t\tkeystroke = getEnvKeystrokeText( keystroke );\n\t\t\t\t}\n\n\t\t\t\tif ( tooltip instanceof Function ) {\n\t\t\t\t\treturn tooltip( label, keystroke );\n\t\t\t\t} else {\n\t\t\t\t\treturn `${ label }${ keystroke ? ` (${ keystroke })` : '' }`;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn '';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/button/dropdownbuttonview\n */\n\nimport ButtonView from '../../button/buttonview';\n\nimport dropdownArrowIcon from '../../../theme/icons/dropdown-arrow.svg';\nimport IconView from '../../icon/iconview';\n\n/**\n * The default dropdown button view class.\n *\n *\t\tconst view = new DropdownButtonView();\n *\n *\t\tview.set( {\n *\t\t\tlabel: 'A button',\n *\t\t\tkeystroke: 'Ctrl+B',\n *\t\t\ttooltip: true\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * Also see the {@link module:ui/dropdown/utils~createDropdown `createDropdown()` util}.\n *\n * @implements module:ui/dropdown/button/dropdownbutton~DropdownButton\n * @extends module:ui/button/buttonview~ButtonView\n */\nexport default class DropdownButtonView extends ButtonView {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * An icon that displays arrow to indicate a dropdown button.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/icon/iconview~IconView}\n\t\t */\n\t\tthis.arrowView = this._createArrowView();\n\n\t\tthis.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\t'aria-haspopup': true\n\t\t\t}\n\t\t} );\n\n\t\t// The DropdownButton interface expects the open event upon which will open the dropdown.\n\t\tthis.delegate( 'execute' ).to( this, 'open' );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis.children.add( this.arrowView );\n\t}\n\n\t/**\n\t * Creates a {@link module:ui/icon/iconview~IconView} instance as {@link #arrowView}.\n\t *\n\t * @private\n\t * @returns {module:ui/icon/iconview~IconView}\n\t */\n\t_createArrowView() {\n\t\tconst arrowView = new IconView();\n\n\t\tarrowView.content = dropdownArrowIcon;\n\n\t\tarrowView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-dropdown__arrow'\n\t\t\t}\n\t\t} );\n\n\t\treturn arrowView;\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 10 10\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M.941 4.523a.75.75 0 1 1 1.06-1.06l3.006 3.005 3.005-3.005a.75.75 0 1 1 1.06 1.06l-3.549 3.55a.75.75 0 0 1-1.168-.136L.941 4.523z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listview\n */\n\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '../focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\nimport '../../theme/components/list/list.css';\n\n/**\n * The list view class.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class ListView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor() {\n\t\tsuper();\n\n\t\t/**\n\t\t * Collection of the child list views.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.items = this.createCollection();\n\n\t\t/**\n\t\t * Tracks information about DOM focus in the list.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new KeystrokeHandler();\n\n\t\t/**\n\t\t * Helps cycling over focusable {@link #items} in the list.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n\t\tthis._focusCycler = new FocusCycler( {\n\t\t\tfocusables: this.items,\n\t\t\tfocusTracker: this.focusTracker,\n\t\t\tkeystrokeHandler: this.keystrokes,\n\t\t\tactions: {\n\t\t\t\t// Navigate list items backwards using the arrowup key.\n\t\t\t\tfocusPrevious: 'arrowup',\n\n\t\t\t\t// Navigate toolbar items forwards using the arrowdown key.\n\t\t\t\tfocusNext: 'arrowdown',\n\t\t\t}\n\t\t} );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'ul',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset',\n\t\t\t\t\t'ck-list'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.items\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Items added before rendering should be known to the #focusTracker.\n\t\tfor ( const item of this.items ) {\n\t\t\tthis.focusTracker.add( item.element );\n\t\t}\n\n\t\tthis.items.on( 'add', ( evt, item ) => {\n\t\t\tthis.focusTracker.add( item.element );\n\t\t} );\n\n\t\tthis.items.on( 'remove', ( evt, item ) => {\n\t\t\tthis.focusTracker.remove( item.element );\n\t\t} );\n\n\t\t// Start listening for the keystrokes coming from #element.\n\t\tthis.keystrokes.listenTo( this.element );\n\t}\n\n\t/**\n\t * Focuses the first focusable in {@link #items}.\n\t */\n\tfocus() {\n\t\tthis._focusCycler.focusFirst();\n\t}\n\n\t/**\n\t * Focuses the last focusable in {@link #items}.\n\t */\n\tfocusLast() {\n\t\tthis._focusCycler.focusLast();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listitemview\n */\n\nimport View from '../view';\n\n/**\n * The list item view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ListItemView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Collection of the child views inside of the list item {@link #element}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'li',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-list__item'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.children\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the list item.\n\t */\n\tfocus() {\n\t\tthis.children.first.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listseparatorview\n */\n\nimport View from '../view';\n\n/**\n * The list separator view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ListSeparatorView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'li',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-list__separator'\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/button/switchbuttonview\n */\n\nimport View from '../view';\nimport ButtonView from './buttonview';\n\nimport '../../theme/components/button/switchbutton.css';\n\n/**\n * The switch button view class.\n *\n *\t\tconst view = new SwitchButtonView();\n *\n *\t\tview.set( {\n *\t\t\twithText: true,\n *\t\t\tlabel: 'Switch me!'\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * @extends module:ui/button/buttonview~ButtonView\n */\nexport default class SwitchButtonView extends ButtonView {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.isToggleable = true;\n\n\t\t/**\n\t\t * The toggle switch of the button.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #toggleSwitchView\n\t\t */\n\t\tthis.toggleSwitchView = this._createToggleView();\n\n\t\tthis.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-switchbutton'\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis.children.add( this.toggleSwitchView );\n\t}\n\n\t/**\n\t * Creates a toggle child view.\n\t *\n\t * @private\n\t * @returns {module:ui/view~View}\n\t */\n\t_createToggleView() {\n\t\tconst toggleSwitchView = new View();\n\n\t\ttoggleSwitchView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__toggle'\n\t\t\t\t],\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'span',\n\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [\n\t\t\t\t\t\t\t'ck',\n\t\t\t\t\t\t\t'ck-button__toggle__inner'\n\t\t\t\t\t\t],\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn toggleSwitchView;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/clickoutsidehandler\n */\n\n/* global document */\n\n/**\n * Handles clicking **outside** of a specified set of elements, then fires an action.\n *\n * **Note**: Actually, the action is executed upon `mousedown`, not `click`. It prevents\n * certain issues when the user keeps holding the mouse button and the UI cannot react\n * properly.\n *\n * @param {Object} options Configuration options.\n * @param {module:utils/dom/emittermixin~Emitter} options.emitter The emitter to which this behavior\n * should be added.\n * @param {Function} options.activator Function returning a `Boolean`, to determine whether the handler is active.\n * @param {Array.<HTMLElement>} options.contextElements HTML elements that determine the scope of the\n * handler. Clicking any of them or their descendants will **not** fire the callback.\n * @param {Function} options.callback An action executed by the handler.\n */\nexport default function clickOutsideHandler( { emitter, activator, callback, contextElements } ) {\n\temitter.listenTo( document, 'mousedown', ( evt, { target } ) => {\n\t\tif ( !activator() ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const contextElement of contextElements ) {\n\t\t\tif ( contextElement.contains( target ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tcallback();\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/dropdown/utils\n */\nimport DropdownPanelView from './dropdownpanelview';\nimport DropdownView from './dropdownview';\nimport DropdownButtonView from './button/dropdownbuttonview';\nimport ToolbarView from '../toolbar/toolbarview';\nimport ListView from '../list/listview';\nimport ListItemView from '../list/listitemview';\nimport ListSeparatorView from '../list/listseparatorview';\nimport ButtonView from '../button/buttonview';\nimport SwitchButtonView from '../button/switchbuttonview';\nimport clickOutsideHandler from '../bindings/clickoutsidehandler';\nimport '../../theme/components/dropdown/toolbardropdown.css';\nimport '../../theme/components/dropdown/listdropdown.css';\n/**\n * A helper for creating dropdowns. It creates an instance of a {@link module:ui/dropdown/dropdownview~DropdownView dropdown},\n * with a {@link module:ui/dropdown/button/dropdownbutton~DropdownButton button},\n * {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView panel} and all standard dropdown's behaviors.\n *\n * # Creating dropdowns\n *\n * By default, the default {@link module:ui/dropdown/button/dropdownbuttonview~DropdownButtonView} class is used as\n * definition of the button:\n *\n *\t\tconst dropdown = createDropdown( model );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\t// Will render a dropdown labeled \"A dropdown\" with an empty panel.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * You can also provide other button views (they need to implement the\n * {@link module:ui/dropdown/button/dropdownbutton~DropdownButton} interface). For instance, you can use\n * {@link module:ui/dropdown/button/splitbuttonview~SplitButtonView} to create a dropdown with a split button.\n *\n *\t\tconst dropdown = createDropdown( model, SplitButtonView );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.buttonView.on( 'execute', () => {\n *\t\t\t// Add the behavior of the \"action part\" of the split button.\n *\t\t\t// Split button consists of the \"action part\" and \"arrow part\".\n *\t\t\t// The arrow opens the dropdown while the action part can have some other behavior.\n * \t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\t// Will render a dropdown labeled \"A dropdown\" with an empty panel.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * # Adding content to the dropdown's panel\n *\n * The content of the panel can be inserted directly into the `dropdown.panelView.element`:\n *\n *\t\tdropdown.panelView.element.textContent = 'Content of the panel';\n *\n * However, most of the time you will want to add there either a {@link module:ui/list/listview~ListView list of options}\n * or a list of buttons (i.e. a {@link module:ui/toolbar/toolbarview~ToolbarView toolbar}).\n * To simplify the task, you can use, respectively, {@link module:ui/dropdown/utils~addListToDropdown} or\n * {@link module:ui/dropdown/utils~addToolbarToDropdown} utils.\n *\n * @param {module:utils/locale~Locale} locale The locale instance.\n * @param {Function} ButtonClass The dropdown button view class. Needs to implement the\n * {@link module:ui/dropdown/button/dropdownbutton~DropdownButton} interface.\n * @returns {module:ui/dropdown/dropdownview~DropdownView} The dropdown view instance.\n */\nexport function createDropdown(locale, ButtonClass = DropdownButtonView) {\n const buttonView = new ButtonClass(locale);\n const panelView = new DropdownPanelView(locale);\n const dropdownView = new DropdownView(locale, buttonView, panelView);\n buttonView.bind('isEnabled').to(dropdownView);\n if (buttonView instanceof DropdownButtonView) {\n buttonView.bind('isOn').to(dropdownView, 'isOpen');\n } else {\n buttonView.arrowView.bind('isOn').to(dropdownView, 'isOpen');\n }\n addDefaultBehavior(dropdownView);\n return dropdownView;\n}\n/**\n * Adds an instance of {@link module:ui/toolbar/toolbarview~ToolbarView} to a dropdown.\n *\n *\t\tconst buttons = [];\n *\n *\t\t// Either create a new ButtonView instance or create existing.\n *\t\tbuttons.push( new ButtonView() );\n *\t\tbuttons.push( editor.ui.componentFactory.get( 'someButton' ) );\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\taddToolbarToDropdown( dropdown, buttons );\n *\n *\t\tdropdown.toolbarView.isVertical = true;\n *\n *\t\t// Will render a vertical button dropdown labeled \"A button dropdown\"\n *\t\t// with a button group in the panel containing two buttons.\n *\t\tdropdown.render()\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * See {@link module:ui/dropdown/utils~createDropdown} and {@link module:ui/toolbar/toolbarview~ToolbarView}.\n *\n * @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView A dropdown instance to which `ToolbarView` will be added.\n * @param {Iterable.<module:ui/button/buttonview~ButtonView>} buttons\n */\nexport function addToolbarToDropdown(dropdownView, buttons) {\n const locale = dropdownView.locale;\n const t = locale.t;\n const toolbarView = dropdownView.toolbarView = new ToolbarView(locale);\n toolbarView.set('ariaLabel', t('bm'));\n dropdownView.extendTemplate({ attributes: { class: ['ck-toolbar-dropdown'] } });\n buttons.map(view => toolbarView.items.add(view));\n dropdownView.panelView.children.add(toolbarView);\n toolbarView.items.delegate('execute').to(dropdownView);\n}\n/**\n * Adds an instance of {@link module:ui/list/listview~ListView} to a dropdown.\n *\n *\t\tconst items = new Collection();\n *\n *\t\titems.add( {\n *\t\t\ttype: 'button',\n *\t\t\tmodel: new Model( {\n *\t\t\t\twithText: true,\n *\t\t\t\tlabel: 'First item',\n *\t\t\t\tlabelStyle: 'color: red'\n *\t\t\t} )\n *\t\t} );\n *\n *\t\titems.add( {\n *\t\t\t type: 'button',\n *\t\t\t model: new Model( {\n *\t\t\t\twithText: true,\n *\t\t\t\tlabel: 'Second item',\n *\t\t\t\tlabelStyle: 'color: green',\n *\t\t\t\tclass: 'foo'\n *\t\t\t} )\n *\t\t} );\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\taddListToDropdown( dropdown, items );\n *\n *\t\t// Will render a dropdown with a list in the panel containing two items.\n *\t\tdropdown.render()\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * The `items` collection passed to this methods controls the presence and attributes of respective\n * {@link module:ui/list/listitemview~ListItemView list items}.\n *\n *\n * See {@link module:ui/dropdown/utils~createDropdown} and {@link module:list/list~List}.\n *\n * @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView A dropdown instance to which `ListVIew` will be added.\n * @param {Iterable.<module:ui/dropdown/utils~ListDropdownItemDefinition>} items\n * A collection of the list item definitions to populate the list.\n */\nexport function addListToDropdown(dropdownView, items) {\n const locale = dropdownView.locale;\n const listView = dropdownView.listView = new ListView(locale);\n listView.items.bindTo(items).using(({type, model}) => {\n if (type === 'separator') {\n return new ListSeparatorView(locale);\n } else if (type === 'button' || type === 'switchbutton') {\n const listItemView = new ListItemView(locale);\n let buttonView;\n if (type === 'button') {\n buttonView = new ButtonView(locale);\n } else {\n buttonView = new SwitchButtonView(locale);\n }\n // Bind all model properties to the button view.\n buttonView.bind(...Object.keys(model)).to(model);\n buttonView.delegate('execute').to(listItemView);\n listItemView.children.add(buttonView);\n return listItemView;\n }\n });\n dropdownView.panelView.children.add(listView);\n listView.items.delegate('execute').to(dropdownView);\n}\n// Add a set of default behaviors to dropdown view.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction addDefaultBehavior(dropdownView) {\n closeDropdownOnBlur(dropdownView);\n closeDropdownOnExecute(dropdownView);\n focusDropdownContentsOnArrows(dropdownView);\n}\n// Adds a behavior to a dropdownView that closes opened dropdown when user clicks outside the dropdown.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction closeDropdownOnBlur(dropdownView) {\n dropdownView.on('render', () => {\n clickOutsideHandler({\n emitter: dropdownView,\n activator: () => dropdownView.isOpen,\n callback: () => {\n dropdownView.isOpen = false;\n },\n contextElements: [dropdownView.element]\n });\n });\n}\n// Adds a behavior to a dropdownView that closes the dropdown view on \"execute\" event.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction closeDropdownOnExecute(dropdownView) {\n // Close the dropdown when one of the list items has been executed.\n dropdownView.on('execute', evt => {\n // Toggling a switch button view should not close the dropdown.\n if (evt.source instanceof SwitchButtonView) {\n return;\n }\n dropdownView.isOpen = false;\n });\n}\n// Adds a behavior to a dropdownView that focuses the dropdown's panel view contents on keystrokes.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction focusDropdownContentsOnArrows(dropdownView) {\n // If the dropdown panel is already open, the arrow down key should focus the first child of the #panelView.\n dropdownView.keystrokes.set('arrowdown', (data, cancel) => {\n if (dropdownView.isOpen) {\n dropdownView.panelView.focus();\n cancel();\n }\n });\n // If the dropdown panel is already open, the arrow up key should focus the last child of the #panelView.\n dropdownView.keystrokes.set('arrowup', (data, cancel) => {\n if (dropdownView.isOpen) {\n dropdownView.panelView.focusLast();\n cancel();\n }\n });\n} /**\n * A definition of the list item used by the {@link module:ui/dropdown/utils~addListToDropdown}\n * utility.\n *\n * @typedef {Object} module:ui/dropdown/utils~ListDropdownItemDefinition\n *\n * @property {String} type Either `'separator'`, `'button'` or `'switchbutton'`.\n * @property {module:ui/model~Model} [model] Model of the item (when **not** `'separator'`).\n * Its properties fuel the newly created list item (or its children, depending on the `type`).\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/toolbar/toolbarview\n */\n/* globals console */\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '../focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport ToolbarSeparatorView from './toolbarseparatorview';\nimport getResizeObserver from '@ckeditor/ckeditor5-utils/src/dom/getresizeobserver';\nimport preventDefault from '../bindings/preventdefault.js';\nimport Rect from '@ckeditor/ckeditor5-utils/src/dom/rect';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport {\n createDropdown,\n addToolbarToDropdown\n} from '../dropdown/utils';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport verticalDotsIcon from '@ckeditor/ckeditor5-core/theme/icons/three-vertical-dots.svg';\nimport '../../theme/components/toolbar/toolbar.css';\n/**\n * The toolbar view class.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class ToolbarView extends View {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~ToolbarView} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} locale The localization services instance.\n\t * @param {module:ui/toolbar/toolbarview~ToolbarOptions} [options] Configuration options of the toolbar.\n\t */\n constructor(locale, options) {\n super(locale);\n const bind = this.bindTemplate;\n const t = this.t;\n /**\n\t\t * A reference to the options object passed to the constructor.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarOptions}\n\t\t */\n this.options = options || {};\n /**\n\t\t * Label used by assistive technologies to describe this toolbar element.\n\t\t *\n\t\t * @default 'Editor toolbar'\n\t\t * @member {String} #ariaLabel\n\t\t */\n this.set('ariaLabel', t('bq'));\n /**\n\t\t * A collection of toolbar items (buttons, dropdowns, etc.).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.items = this.createCollection();\n /**\n\t\t * Tracks information about the DOM focus in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}\n\t\t * to handle keyboard navigation in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * An additional CSS class added to the {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n this.set('class');\n /**\n\t\t * A (child) view containing {@link #items toolbar items}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ItemsView}\n\t\t */\n this.itemsView = new ItemsView(locale);\n /**\n\t\t * A top–level collection aggregating building blocks of the toolbar.\n\t\t *\n\t\t *\t┌───────────────── ToolbarView ─────────────────┐\n\t\t *\t| ┌──────────────── #children ────────────────┐ |\n\t\t *\t| | ┌──────────── #itemsView ───────────┐ | |\n\t\t *\t| | | [ item1 ] [ item2 ] ... [ itemN ] | | |\n\t\t *\t| | └──────────────────────────────────-┘ | |\n\t\t *\t| └───────────────────────────────────────────┘ |\n\t\t *\t└───────────────────────────────────────────────┘\n\t\t *\n\t\t * By default, it contains the {@link #itemsView} but it can be extended with additional\n\t\t * UI elements when necessary.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this.createCollection();\n this.children.add(this.itemsView);\n /**\n\t\t * A collection of {@link #items} that take part in the focus cycling\n\t\t * (i.e. navigation using the keyboard). Usually, it contains a subset of {@link #items} with\n\t\t * some optional UI elements that also belong to the toolbar and should be focusable\n\t\t * by the user.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.focusables = this.createCollection();\n /**\n\t\t * Controls the orientation of toolbar items. Only available when\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull dynamic items grouping}\n\t\t * is **disabled**.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isVertical\n\t\t */\n /**\n\t\t * Helps cycling over {@link #focusables focusable items} in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this.focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate toolbar items backwards using the arrow[left,up] keys.\n focusPrevious: [\n 'arrowleft',\n 'arrowup'\n ],\n // Navigate toolbar items forwards using the arrow[right,down] keys.\n focusNext: [\n 'arrowright',\n 'arrowdown'\n ]\n }\n });\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-toolbar',\n bind.to('class')\n ],\n role: 'toolbar',\n 'aria-label': bind.to('ariaLabel')\n },\n children: this.children,\n on: {\n // https://github.com/ckeditor/ckeditor5-ui/issues/206\n mousedown: preventDefault(this)\n }\n });\n /**\n\t\t * An instance of the active toolbar behavior that shapes its look and functionality.\n\t\t *\n\t\t * See {@link module:ui/toolbar/toolbarview~ToolbarBehavior} to learn more.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarBehavior}\n\t\t */\n this._behavior = this.options.shouldGroupWhenFull ? new DynamicGrouping(this) : new StaticLayout(this);\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n // Children added before rendering should be known to the #focusTracker.\n for (const item of this.items) {\n this.focusTracker.add(item.element);\n }\n this.items.on('add', (evt, item) => {\n this.focusTracker.add(item.element);\n });\n this.items.on('remove', (evt, item) => {\n this.focusTracker.remove(item.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n this._behavior.render(this);\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n this._behavior.destroy();\n return super.destroy();\n }\n /**\n\t * Focuses the first focusable in {@link #focusables}.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Focuses the last focusable in {@link #focusables}.\n\t */\n focusLast() {\n this._focusCycler.focusLast();\n }\n /**\n\t * A utility that expands the plain toolbar configuration into\n\t * {@link module:ui/toolbar/toolbarview~ToolbarView#items} using a given component factory.\n\t *\n\t * @param {Array.<String>} config The toolbar items configuration.\n\t * @param {module:ui/componentfactory~ComponentFactory} factory A factory producing toolbar items.\n\t */\n fillFromConfig(config, factory) {\n config.map(name => {\n if (name == '|') {\n this.items.add(new ToolbarSeparatorView());\n } else if (factory.has(name)) {\n this.items.add(factory.create(name));\n } else {\n /**\n\t\t\t\t * There was a problem processing the configuration of the toolbar. The item with the given\n\t\t\t\t * name does not exist so it was omitted when rendering the toolbar.\n\t\t\t\t *\n\t\t\t\t * This warning usually shows up when the {@link module:core/plugin~Plugin} which is supposed\n\t\t\t\t * to provide a toolbar item has not been loaded or there is a typo in the configuration.\n\t\t\t\t *\n\t\t\t\t * Make sure the plugin responsible for this toolbar item is loaded and the toolbar configuration\n\t\t\t\t * is correct, e.g. {@link module:basic-styles/bold~Bold} is loaded for the `'bold'` toolbar item.\n\t\t\t\t *\n\t\t\t\t * You can use the following snippet to retrieve all available toolbar items:\n\t\t\t\t *\n\t\t\t\t *\t\tArray.from( editor.ui.componentFactory.names() );\n\t\t\t\t *\n\t\t\t\t * @error toolbarview-item-unavailable\n\t\t\t\t * @param {String} name The name of the component.\n\t\t\t\t */\n console.warn(attachLinkToDocumentation('toolbarview-item-unavailable: The requested toolbar item is unavailable.'), { name });\n }\n });\n }\n}\n/**\n * An inner block of the {@link module:ui/toolbar/toolbarview~ToolbarView} hosting its\n * {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n *\n * @private\n * @extends module:ui/view~View\n */\nclass ItemsView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n /**\n\t\t * A collection of items (buttons, dropdowns, etc.).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this.createCollection();\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-toolbar__items'\n ]\n },\n children: this.children\n });\n }\n}\n/**\n * A toolbar behavior that makes it static and unresponsive to the changes of the environment.\n * At the same time, it also makes it possible to display a toolbar with a vertical layout\n * using the {@link module:ui/toolbar/toolbarview~ToolbarView#isVertical} property.\n *\n * @private\n * @implements module:ui/toolbar/toolbarview~ToolbarBehavior\n */\nclass StaticLayout {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~StaticLayout} toolbar\n\t * behavior.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n constructor(view) {\n const bind = view.bindTemplate;\n // Static toolbar can be vertical when needed.\n view.set('isVertical', false);\n // 1:1 pass–through binding, all ToolbarView#items are visible.\n view.itemsView.children.bindTo(view.items).using(item => item);\n // 1:1 pass–through binding, all ToolbarView#items are focusable.\n view.focusables.bindTo(view.items).using(item => item);\n view.extendTemplate({\n attributes: {\n class: [// When vertical, the toolbar has an additional CSS class.\n bind.if('isVertical', 'ck-toolbar_vertical')]\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n }\n}\n/**\n * A toolbar behavior that makes the items respond to changes in the geometry.\n *\n * In a nutshell, it groups {@link module:ui/toolbar/toolbarview~ToolbarView#items}\n * that do not fit visually into a single row of the toolbar (due to limited space).\n * Items that do not fit are aggregated in a dropdown displayed at the end of the toolbar.\n *\n *\t┌──────────────────────────────────────── ToolbarView ──────────────────────────────────────────┐\n *\t| ┌─────────────────────────────────────── #children ─────────────────────────────────────────┐ |\n *\t| | ┌─────── #itemsView ────────┐ ┌──────────────────────┐ ┌── #groupedItemsDropdown ───┐ | |\n *\t| | | #ungroupedItems | | ToolbarSeparatorView | | #groupedItems | | |\n *\t| | └──────────────────────────-┘ └──────────────────────┘ └────────────────────────────┘ | |\n *\t| | \\---------- only when toolbar items overflow --------/ | |\n *\t| └───────────────────────────────────────────────────────────────────────────────────────────┘ |\n *\t└───────────────────────────────────────────────────────────────────────────────────────────────┘\n *\n * @private\n * @implements module:ui/toolbar/toolbarview~ToolbarBehavior\n */\nclass DynamicGrouping {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~DynamicGrouping} toolbar\n\t * behavior.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n constructor(view) {\n /**\n\t\t * A collection of toolbar children.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.viewChildren = view.children;\n /**\n\t\t * A collection of focusable toolbar elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.viewFocusables = view.focusables;\n /**\n\t\t * A view containing toolbar items.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ItemsView}\n\t\t */\n this.viewItemsView = view.itemsView;\n /**\n\t\t * Toolbar focus tracker.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.viewFocusTracker = view.focusTracker;\n /**\n\t\t * Toolbar locale.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n this.viewLocale = view.locale;\n /**\n\t\t * Toolbar element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} #viewElement\n\t\t */\n /**\n\t\t * A subset of toolbar {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n\t\t * Aggregates items that fit into a single row of the toolbar and were not {@link #groupedItems grouped}\n\t\t * into a {@link #groupedItemsDropdown dropdown}. Items of this collection are displayed in the\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarView#itemsView}.\n\t\t *\n\t\t * When none of the {@link module:ui/toolbar/toolbarview~ToolbarView#items} were grouped, it\n\t\t * matches the {@link module:ui/toolbar/toolbarview~ToolbarView#items} collection in size and order.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.ungroupedItems = view.createCollection();\n /**\n\t\t * A subset of toolbar {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n\t\t * A collection of the toolbar items that do not fit into a single row of the toolbar.\n\t\t * Grouped items are displayed in a dedicated {@link #groupedItemsDropdown dropdown}.\n\t\t *\n\t\t * When none of the {@link module:ui/toolbar/toolbarview~ToolbarView#items} were grouped,\n\t\t * this collection is empty.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.groupedItems = view.createCollection();\n /**\n\t\t * The dropdown that aggregates {@link #groupedItems grouped items} that do not fit into a single\n\t\t * row of the toolbar. It is displayed on demand as the last of\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarView#children toolbar children} and offers another\n\t\t * (nested) toolbar which displays items that would normally overflow.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/dropdown/dropdownview~DropdownView}\n\t\t */\n this.groupedItemsDropdown = this._createGroupedItemsDropdown();\n /**\n\t\t * An instance of the resize observer that helps dynamically determine the geometry of the toolbar\n\t\t * and manage items that do not fit into a single row.\n\t\t *\n\t\t * **Note:** Created in {@link #_enableGroupingOnResize}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/dom/getresizeobserver~ResizeObserver}\n\t\t */\n this.resizeObserver = null;\n /**\n\t\t * A cached value of the horizontal padding style used by {@link #_updateGrouping}\n\t\t * to manage the {@link module:ui/toolbar/toolbarview~ToolbarView#items} that do not fit into\n\t\t * a single toolbar line. This value can be reused between updates because it is unlikely that\n\t\t * the padding will change and re–using `Window.getComputedStyle()` is expensive.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n this.cachedPadding = null;\n // Only those items that were not grouped are visible to the user.\n view.itemsView.children.bindTo(this.ungroupedItems).using(item => item);\n // Make sure all #items visible in the main space of the toolbar are \"focuscycleable\".\n this.ungroupedItems.on('add', this._updateFocusCycleableItems.bind(this));\n this.ungroupedItems.on('remove', this._updateFocusCycleableItems.bind(this));\n // Make sure the #groupedItemsDropdown is also included in cycling when it appears.\n view.children.on('add', this._updateFocusCycleableItems.bind(this));\n view.children.on('remove', this._updateFocusCycleableItems.bind(this));\n // ToolbarView#items is dynamic. When an item is added, it should be automatically\n // represented in either grouped or ungrouped items at the right index.\n // In other words #items == concat( #ungroupedItems, #groupedItems )\n // (in length and order).\n view.items.on('add', (evt, item, index) => {\n if (index > this.ungroupedItems.length) {\n this.groupedItems.add(item, index - this.ungroupedItems.length);\n } else {\n this.ungroupedItems.add(item, index);\n }\n // When a new ungrouped item joins in and lands in #ungroupedItems, there's a chance it causes\n // the toolbar to overflow.\n this._updateGrouping();\n });\n // When an item is removed from ToolbarView#items, it should be automatically\n // removed from either grouped or ungrouped items.\n view.items.on('remove', (evt, item, index) => {\n if (index > this.ungroupedItems.length) {\n this.groupedItems.remove(item);\n } else {\n this.ungroupedItems.remove(item);\n }\n // Whether removed from grouped or ungrouped items, there is a chance\n // some new space is available and we could do some ungrouping.\n this._updateGrouping();\n });\n view.extendTemplate({\n attributes: {\n class: [// To group items dynamically, the toolbar needs a dedicated CSS class.\n 'ck-toolbar_grouping']\n }\n });\n }\n /**\n\t * Enables dynamic items grouping based on the dimensions of the toolbar.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n render(view) {\n this.viewElement = view.element;\n this._enableGroupingOnResize();\n }\n /**\n\t * Cleans up the internals used by this behavior.\n\t */\n destroy() {\n // The dropdown may not be in ToolbarView#children at the moment of toolbar destruction\n // so let's make sure it's actually destroyed along with the toolbar.\n this.groupedItemsDropdown.destroy();\n this.resizeObserver.disconnect();\n }\n /**\n\t * When called, it will check if any of the {@link #ungroupedItems} do not fit into a single row of the toolbar,\n\t * and it will move them to the {@link #groupedItems} when it happens.\n\t *\n\t * At the same time, it will also check if there is enough space in the toolbar for the first of the\n\t * {@link #groupedItems} to be returned back to {@link #ungroupedItems} and still fit into a single row\n\t * without the toolbar wrapping.\n\t *\n\t * @protected\n\t */\n _updateGrouping() {\n // Do no grouping–related geometry analysis when the toolbar is detached from visible DOM,\n // for instance before #render(), or after render but without a parent or a parent detached\n // from DOM. DOMRects won't work anyway and there will be tons of warning in the console and\n // nothing else.\n if (!this.viewElement.ownerDocument.body.contains(this.viewElement)) {\n return;\n }\n let wereItemsGrouped;\n // Group #items as long as some wrap to the next row. This will happen, for instance,\n // when the toolbar is getting narrow and there is not enough space to display all items in\n // a single row.\n while (this._areItemsOverflowing) {\n this._groupLastItem();\n wereItemsGrouped = true;\n }\n // If none were grouped now but there were some items already grouped before,\n // then, what the hell, maybe let's see if some of them can be ungrouped. This happens when,\n // for instance, the toolbar is stretching and there's more space in it than before.\n if (!wereItemsGrouped && this.groupedItems.length) {\n // Ungroup items as long as none are overflowing or there are none to ungroup left.\n while (this.groupedItems.length && !this._areItemsOverflowing) {\n this._ungroupFirstItem();\n }\n // If the ungrouping ended up with some item wrapping to the next row,\n // put it back to the group toolbar (\"undo the last ungroup\"). We don't know whether\n // an item will wrap or not until we ungroup it (that's a DOM/CSS thing) so this\n // clean–up is vital for the algorithm.\n if (this._areItemsOverflowing) {\n this._groupLastItem();\n }\n }\n }\n /**\n\t * Returns `true` when {@link module:ui/toolbar/toolbarview~ToolbarView#element} children visually overflow,\n\t * for instance if the toolbar is narrower than its members. Returns `false` otherwise.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _areItemsOverflowing() {\n // An empty toolbar cannot overflow.\n if (!this.ungroupedItems.length) {\n return false;\n }\n const element = this.viewElement;\n const uiLanguageDirection = this.viewLocale.uiLanguageDirection;\n const lastChildRect = new Rect(element.lastChild);\n const toolbarRect = new Rect(element);\n if (!this.cachedPadding) {\n const computedStyle = global.window.getComputedStyle(element);\n const paddingProperty = uiLanguageDirection === 'ltr' ? 'paddingRight' : 'paddingLeft';\n // parseInt() is essential because of quirky floating point numbers logic and DOM.\n // If the padding turned out too big because of that, the grouped items dropdown would\n // always look (from the Rect perspective) like it overflows (while it's not).\n this.cachedPadding = Number.parseInt(computedStyle[paddingProperty]);\n }\n if (uiLanguageDirection === 'ltr') {\n return lastChildRect.right > toolbarRect.right - this.cachedPadding;\n } else {\n return lastChildRect.left < toolbarRect.left + this.cachedPadding;\n }\n }\n /**\n\t * Enables the functionality that prevents {@link #ungroupedItems} from overflowing (wrapping to the next row)\n\t * upon resize when there is little space available. Instead, the toolbar items are moved to the\n\t * {@link #groupedItems} collection and displayed in a dropdown at the end of the row (which has its own nested toolbar).\n\t *\n\t * When called, the toolbar will automatically analyze the location of its {@link #ungroupedItems} and \"group\"\n\t * them in the dropdown if necessary. It will also observe the browser window for size changes in\n\t * the future and respond to them by grouping more items or reverting already grouped back, depending\n\t * on the visual space available.\n\t *\n\t * @private\n\t */\n _enableGroupingOnResize() {\n let previousWidth;\n // TODO: Consider debounce.\n this.resizeObserver = getResizeObserver(([entry]) => {\n if (!previousWidth || previousWidth !== entry.contentRect.width) {\n this._updateGrouping();\n previousWidth = entry.contentRect.width;\n }\n });\n this.resizeObserver.observe(this.viewElement);\n this._updateGrouping();\n }\n /**\n\t * When called, it will remove the last item from {@link #ungroupedItems} and move it back\n\t * to the {@link #groupedItems} collection.\n\t *\n\t * The opposite of {@link #_ungroupFirstItem}.\n\t *\n\t * @private\n\t */\n _groupLastItem() {\n if (!this.groupedItems.length) {\n this.viewChildren.add(new ToolbarSeparatorView());\n this.viewChildren.add(this.groupedItemsDropdown);\n this.viewFocusTracker.add(this.groupedItemsDropdown.element);\n }\n this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last), 0);\n }\n /**\n\t * Moves the very first item belonging to {@link #groupedItems} back\n\t * to the {@link #ungroupedItems} collection.\n\t *\n\t * The opposite of {@link #_groupLastItem}.\n\t *\n\t * @private\n\t */\n _ungroupFirstItem() {\n this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first));\n if (!this.groupedItems.length) {\n this.viewChildren.remove(this.groupedItemsDropdown);\n this.viewChildren.remove(this.viewChildren.last);\n this.viewFocusTracker.remove(this.groupedItemsDropdown.element);\n }\n }\n /**\n\t * Creates the {@link #groupedItemsDropdown} that hosts the members of the {@link #groupedItems}\n\t * collection when there is not enough space in the toolbar to display all items in a single row.\n\t *\n\t * @private\n\t * @returns {module:ui/dropdown/dropdownview~DropdownView}\n\t */\n _createGroupedItemsDropdown() {\n const locale = this.viewLocale;\n const t = locale.t;\n const dropdown = createDropdown(locale);\n dropdown.class = 'ck-toolbar__grouped-dropdown';\n // Make sure the dropdown never sticks out to the left/right. It should be under the main toolbar.\n // (https://github.com/ckeditor/ckeditor5/issues/5608)\n dropdown.panelPosition = locale.uiLanguageDirection === 'ltr' ? 'sw' : 'se';\n addToolbarToDropdown(dropdown, []);\n dropdown.buttonView.set({\n label: t('br'),\n tooltip: true,\n icon: verticalDotsIcon\n });\n // 1:1 pass–through binding.\n dropdown.toolbarView.items.bindTo(this.groupedItems).using(item => item);\n return dropdown;\n }\n /**\n\t * Updates the {@link module:ui/toolbar/toolbarview~ToolbarView#focusables focus–cycleable items}\n\t * collection so it represents the up–to–date state of the UI from the perspective of the user.\n\t *\n\t * For instance, the {@link #groupedItemsDropdown} can show up and hide but when it is visible,\n\t * it must be subject to focus cycling in the toolbar.\n\t *\n\t * See the {@link module:ui/toolbar/toolbarview~ToolbarView#focusables collection} documentation\n\t * to learn more about the purpose of this method.\n\t *\n\t * @private\n\t */\n _updateFocusCycleableItems() {\n this.viewFocusables.clear();\n this.ungroupedItems.map(item => {\n this.viewFocusables.add(item);\n });\n if (this.groupedItems.length) {\n this.viewFocusables.add(this.groupedItemsDropdown);\n }\n }\n} /**\n * Options passed to the {@link module:ui/toolbar/toolbarview~ToolbarView#constructor} of the toolbar.\n *\n * @interface module:ui/toolbar/toolbarview~ToolbarOptions\n */\n /**\n * When set to `true`, the toolbar will automatically group {@link module:ui/toolbar/toolbarview~ToolbarView#items} that\n * would normally wrap to the next line when there is not enough space to display them in a single row, for\n * instance, if the parent container of the toolbar is narrow.\n *\n * @member {Boolean} module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull\n */\n /**\n * A class interface defining the behavior of the {@link module:ui/toolbar/toolbarview~ToolbarView}.\n *\n * Toolbar behaviors extend its look and functionality and have an impact on the\n * {@link module:ui/toolbar/toolbarview~ToolbarView#element} template or\n * {@link module:ui/toolbar/toolbarview~ToolbarView#render rendering}. They can be enabled\n * conditionally, e.g. depending on the configuration of the toolbar.\n *\n * @private\n * @interface module:ui/toolbar/toolbarview~ToolbarBehavior\n */\n /**\n * Creates a new toolbar behavior instance.\n *\n * The instance is created in the {@link module:ui/toolbar/toolbarview~ToolbarView#constructor} of the toolbar.\n * This is the right place to extend the {@link module:ui/toolbar/toolbarview~ToolbarView#template} of\n * the toolbar, define extra toolbar properties, etc.\n *\n * @method #constructor\n * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior is added to.\n */\n /**\n * A method called after the toolbar has been {@link module:ui/toolbar/toolbarview~ToolbarView#render rendered}.\n * It can be used to, for example, customize the behavior of the toolbar when its {@link module:ui/toolbar/toolbarview~ToolbarView#element}\n * is available.\n *\n * @readonly\n * @member {Function} #render\n * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar being rendered.\n */\n /**\n * A method called after the toolbar has been {@link module:ui/toolbar/toolbarview~ToolbarView#destroy destroyed}.\n * It allows cleaning up after the toolbar behavior, for instance, this is the right place to detach\n * event listeners, free up references, etc.\n *\n * @readonly\n * @member {Function} #destroy\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/preventdefault\n */\n\n/**\n * A helper which executes a native `Event.preventDefault()` if the target of an event equals the\n * {@link module:ui/view~View#element element of the view}. It shortens the definition of a\n * {@link module:ui/view~View#template template}.\n *\n *\t\t// In a class extending View.\n *\t\timport preventDefault from '@ckeditor/ckeditor5-ui/src/bindings/preventdefault';\n *\n *\t\t// ...\n *\n *\t\tthis.setTemplate( {\n *\t\t\ttag: 'div',\n *\n *\t\t\ton: {\n *\t\t\t\t// Prevent the default mousedown action on this view.\n *\t\t\t\tmousedown: preventDefault( this )\n *\t\t\t}\n *\t\t} );\n *\n * @param {module:ui/view~View} view View instance that defines the template.\n * @returns {module:ui/template~TemplateToBinding}\n */\nexport default function preventDefault( view ) {\n\treturn view.bindTemplate.to( evt => {\n\t\tif ( evt.target === view.element ) {\n\t\t\tevt.preventDefault();\n\t\t}\n\t} );\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><circle cx=\\\"9.5\\\" cy=\\\"4.5\\\" r=\\\"1.5\\\"/><circle cx=\\\"9.5\\\" cy=\\\"10.5\\\" r=\\\"1.5\\\"/><circle cx=\\\"9.5\\\" cy=\\\"16.5\\\" r=\\\"1.5\\\"/></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditoruiview\n */\n\nimport BoxedEditorUIView from '@ckeditor/ckeditor5-ui/src/editorui/boxed/boxededitoruiview';\nimport InlineEditableUIView from '@ckeditor/ckeditor5-ui/src/editableui/inline/inlineeditableuiview';\nimport StickyPanelView from '@ckeditor/ckeditor5-ui/src/panel/sticky/stickypanelview';\nimport ToolbarView from '@ckeditor/ckeditor5-ui/src/toolbar/toolbarview';\n\nimport '../theme/classiceditor.css';\n\n/**\n * Classic editor UI view. Uses an inline editable and a sticky toolbar, all\n * enclosed in a boxed UI view.\n *\n * @extends module:ui/editorui/boxed/boxededitoruiview~BoxedEditorUIView\n */\nexport default class ClassicEditorUIView extends BoxedEditorUIView {\n\t/**\n\t * Creates an instance of the classic editor UI view.\n\t *\n\t * @param {module:utils/locale~Locale} locale The {@link module:core/editor/editor~Editor#locale} instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance this view is related to.\n\t * @param {Object} [options={}] Configuration options fo the view instance.\n\t * @param {Boolean} [options.shouldToolbarGroupWhenFull] When set `true` enables automatic items grouping\n\t * in the main {@link module:editor-classic/classiceditoruiview~ClassicEditorUIView#toolbar toolbar}.\n\t * See {@link module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull} to learn more.\n\t */\n\tconstructor( locale, editingView, options = {} ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Sticky panel view instance. This is a parent view of a {@link #toolbar}\n\t\t * that makes toolbar sticky.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/panel/sticky/stickypanelview~StickyPanelView}\n\t\t */\n\t\tthis.stickyPanel = new StickyPanelView( locale );\n\n\t\t/**\n\t\t * Toolbar view instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarView}\n\t\t */\n\t\tthis.toolbar = new ToolbarView( locale, {\n\t\t\tshouldGroupWhenFull: options.shouldToolbarGroupWhenFull\n\t\t} );\n\n\t\t/**\n\t\t * Editable UI view.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/editableui/inline/inlineeditableuiview~InlineEditableUIView}\n\t\t */\n\t\tthis.editable = new InlineEditableUIView( locale, editingView );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Set toolbar as a child of a stickyPanel and makes toolbar sticky.\n\t\tthis.stickyPanel.content.add( this.toolbar );\n\n\t\tthis.top.add( this.stickyPanel );\n\t\tthis.main.add( this.editable );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditor\n */\n\nimport Editor from '@ckeditor/ckeditor5-core/src/editor/editor';\nimport DataApiMixin from '@ckeditor/ckeditor5-core/src/editor/utils/dataapimixin';\nimport ElementApiMixin from '@ckeditor/ckeditor5-core/src/editor/utils/elementapimixin';\nimport attachToForm from '@ckeditor/ckeditor5-core/src/editor/utils/attachtoform';\nimport HtmlDataProcessor from '@ckeditor/ckeditor5-engine/src/dataprocessor/htmldataprocessor';\nimport ClassicEditorUI from './classiceditorui';\nimport ClassicEditorUIView from './classiceditoruiview';\nimport getDataFromElement from '@ckeditor/ckeditor5-utils/src/dom/getdatafromelement';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { isElement } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The {@glink builds/guides/overview#classic-editor classic editor} implementation.\n * It uses an inline editable and a sticky toolbar, all enclosed in a boxed UI.\n * See the {@glink examples/builds/classic-editor demo}.\n *\n * In order to create a classic editor instance, use the static\n * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`} method.\n *\n * # Classic editor and classic build\n *\n * The classic editor can be used directly from source (if you installed the\n * [`@ckeditor/ckeditor5-editor-classic`](https://www.npmjs.com/package/@ckeditor/ckeditor5-editor-classic) package)\n * but it is also available in the {@glink builds/guides/overview#classic-editor classic build}.\n *\n * {@glink builds/guides/overview Builds} are ready-to-use editors with plugins bundled in. When using the editor from\n * source you need to take care of loading all plugins by yourself\n * (through the {@link module:core/editor/editorconfig~EditorConfig#plugins `config.plugins`} option).\n * Using the editor from source gives much better flexibility and allows easier customization.\n *\n * Read more about initializing the editor from source or as a build in\n * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}.\n *\n * @mixes module:core/editor/utils/dataapimixin~DataApiMixin\n * @mixes module:core/editor/utils/elementapimixin~ElementApiMixin\n * @implements module:core/editor/editorwithui~EditorWithUI\n * @extends module:core/editor/editor~Editor\n */\nexport default class ClassicEditor extends Editor {\n\t/**\n\t * Creates an instance of the classic editor.\n\t *\n\t * **Note:** do not use the constructor to create editor instances. Use the static\n\t * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`} method instead.\n\t *\n\t * @protected\n\t * @param {HTMLElement|String} sourceElementOrData The DOM element that will be the source for the created editor\n\t * or the editor's initial data. For more information see\n\t * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}.\n\t * @param {module:core/editor/editorconfig~EditorConfig} config The editor configuration.\n\t */\n\tconstructor( sourceElementOrData, config ) {\n\t\tsuper( config );\n\n\t\tif ( isElement( sourceElementOrData ) ) {\n\t\t\tthis.sourceElement = sourceElementOrData;\n\t\t}\n\n\t\tthis.data.processor = new HtmlDataProcessor();\n\n\t\tthis.model.document.createRoot();\n\n\t\tconst shouldToolbarGroupWhenFull = !this.config.get( 'toolbar.shouldNotGroupWhenFull' );\n\t\tconst view = new ClassicEditorUIView( this.locale, this.editing.view, {\n\t\t\tshouldToolbarGroupWhenFull\n\t\t} );\n\n\t\tthis.ui = new ClassicEditorUI( this, view );\n\n\t\tattachToForm( this );\n\t}\n\n\t/**\n\t * Destroys the editor instance, releasing all resources used by it.\n\t *\n\t * Updates the editor's source element with the data.\n\t *\n\t * @returns {Promise}\n\t */\n\tdestroy() {\n\t\tif ( this.sourceElement ) {\n\t\t\tthis.updateSourceElement();\n\t\t}\n\n\t\tthis.ui.destroy();\n\n\t\treturn super.destroy();\n\t}\n\n\t/**\n\t * Creates a new classic editor instance.\n\t *\n\t * There are three ways how the editor can be initialized.\n\t *\n\t * # Replacing a DOM element (and loading data from it)\n\t *\n\t * You can initialize the editor using an existing DOM element:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ) )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * The element's content will be used as the editor data and the element will be replaced by the editor UI.\n\t *\n\t * # Creating a detached editor\n\t *\n\t * Alternatively, you can initialize the editor by passing the initial data directly as a string.\n\t * In this case, the editor will render an element that must be inserted into the DOM:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( '<p>Hello world!</p>' )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\n\t *\t\t\t\t// Initial data was provided so the editor UI element needs to be added manually to the DOM.\n\t *\t\t\t\tdocument.body.appendChild( editor.ui.element );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * This lets you dynamically append the editor to your web page whenever it is convenient for you. You may use this method if your\n\t * web page content is generated on the client side and the DOM structure is not ready at the moment when you initialize the editor.\n\t *\n\t * # Replacing a DOM element (and data provided in `config.initialData`)\n\t *\n\t * You can also mix these two ways by providing a DOM element to be used and passing the initial data through the configuration:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ), {\n\t *\t\t\t\tinitialData: '<h2>Initial data</h2><p>Foo bar.</p>'\n\t *\t\t\t} )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * This method can be used to initialize the editor on an existing element with the specified content in case if your integration\n\t * makes it difficult to set the content of the source element.\n\t *\n\t * Note that an error will be thrown if you pass the initial data both as the first parameter and also in the configuration.\n\t *\n\t * # Configuring the editor\n\t *\n\t * See the {@link module:core/editor/editorconfig~EditorConfig editor configuration documentation} to learn more about\n\t * customizing plugins, toolbar and more.\n\t *\n\t * # Using the editor from source\n\t *\n\t * The code samples listed in the previous sections of this documentation assume that you are using an\n\t * {@glink builds/guides/overview editor build} (for example – `@ckeditor/ckeditor5-build-classic`).\n\t *\n\t * If you want to use the classic editor from source (`@ckeditor/ckeditor5-editor-classic/src/classiceditor`),\n\t * you need to define the list of\n\t * {@link module:core/editor/editorconfig~EditorConfig#plugins plugins to be initialized} and\n\t * {@link module:core/editor/editorconfig~EditorConfig#toolbar toolbar items}. Read more about using the editor from\n\t * source in the {@glink builds/guides/integration/advanced-setup \"Advanced setup\" guide}.\n\t *\n\t * @param {HTMLElement|String} sourceElementOrData The DOM element that will be the source for the created editor\n\t * or the editor's initial data.\n\t *\n\t * If a DOM element is passed, its content will be automatically loaded to the editor upon initialization\n\t * and the {@link module:editor-classic/classiceditorui~ClassicEditorUI#element editor element} will replace the passed element\n\t * in the DOM (the original one will be hidden and the editor will be injected next to it).\n\t *\n\t * Moreover, the editor data will be set back to the original element once the editor is destroyed and when a form, in which\n\t * this element is contained, is submitted (if the original element is a `<textarea>`). This ensures seamless integration with native\n\t * web forms.\n\t *\n\t * If the initial data is passed, a detached editor will be created. In this case you need to insert it into the DOM manually.\n\t * It is available under the {@link module:editor-classic/classiceditorui~ClassicEditorUI#element `editor.ui.element`} property.\n\t *\n\t * @param {module:core/editor/editorconfig~EditorConfig} [config] The editor configuration.\n\t * @returns {Promise} A promise resolved once the editor is ready. The promise resolves with the created editor instance.\n\t */\n\tstatic create( sourceElementOrData, config = {} ) {\n\t\treturn new Promise( resolve => {\n\t\t\tconst editor = new this( sourceElementOrData, config );\n\n\t\t\tresolve(\n\t\t\t\teditor.initPlugins()\n\t\t\t\t\t.then( () => editor.ui.init( isElement( sourceElementOrData ) ? sourceElementOrData : null ) )\n\t\t\t\t\t.then( () => {\n\t\t\t\t\t\tif ( !isElement( sourceElementOrData ) && config.initialData ) {\n\t\t\t\t\t\t\t// Documented in core/editor/editorconfig.jdoc.\n\t\t\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t\t\t'editor-create-initial-data: ' +\n\t\t\t\t\t\t\t\t'The config.initialData option cannot be used together with initial data passed in Editor.create().',\n\t\t\t\t\t\t\t\tnull\n\t\t\t\t\t\t\t);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tconst initialData = config.initialData || getInitialData( sourceElementOrData );\n\n\t\t\t\t\t\treturn editor.data.init( initialData );\n\t\t\t\t\t} )\n\t\t\t\t\t.then( () => editor.fire( 'ready' ) )\n\t\t\t\t\t.then( () => editor )\n\t\t\t);\n\t\t} );\n\t}\n}\n\nmix( ClassicEditor, DataApiMixin );\nmix( ClassicEditor, ElementApiMixin );\n\nfunction getInitialData( sourceElementOrData ) {\n\treturn isElement( sourceElementOrData ) ? getDataFromElement( sourceElementOrData ) : sourceElementOrData;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { isFunction } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * @module core/editor/utils/attachtoform\n */\n\n/**\n * Checks if the editor is initialized on a `<textarea>` element that belongs to a form. If yes, it updates the editor's element\n * content before submitting the form.\n *\n * This helper requires the {@link module:core/editor/utils/elementapimixin~ElementApi ElementApi interface}.\n *\n * @param {module:core/editor/editor~Editor} editor Editor instance.\n */\nexport default function attachToForm( editor ) {\n\tif ( !isFunction( editor.updateSourceElement ) ) {\n\t\t/**\n\t\t * The editor passed to `attachToForm()` must implement the\n\t\t * {@link module:core/editor/utils/elementapimixin~ElementApi} interface.\n\t\t *\n\t\t * @error attachtoform-missing-elementapi-interface\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'attachtoform-missing-elementapi-interface: Editor passed to attachToForm() must implement ElementApi.',\n\t\t\teditor\n\t\t);\n\t}\n\n\tconst sourceElement = editor.sourceElement;\n\n\t// Only when replacing a textarea which is inside of a form element.\n\tif ( sourceElement && sourceElement.tagName.toLowerCase() === 'textarea' && sourceElement.form ) {\n\t\tlet originalSubmit;\n\t\tconst form = sourceElement.form;\n\t\tconst onSubmit = () => editor.updateSourceElement();\n\n\t\t// Replace the original form#submit() to call a custom submit function first.\n\t\t// Check if #submit is a function because the form might have an input named \"submit\".\n\t\tif ( isFunction( form.submit ) ) {\n\t\t\toriginalSubmit = form.submit;\n\n\t\t\tform.submit = () => {\n\t\t\t\tonSubmit();\n\t\t\t\toriginalSubmit.apply( form );\n\t\t\t};\n\t\t}\n\n\t\t// Update the replaced textarea with data before each form#submit event.\n\t\tform.addEventListener( 'submit', onSubmit );\n\n\t\t// Remove the submit listener and revert the original submit method on\n\t\t// editor#destroy.\n\t\teditor.on( 'destroy', () => {\n\t\t\tform.removeEventListener( 'submit', onSubmit );\n\n\t\t\tif ( originalSubmit ) {\n\t\t\t\tform.submit = originalSubmit;\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals HTMLTextAreaElement */\n\n/**\n * @module utils/dom/getdatafromelement\n */\n\n/**\n * Gets data from a given source element.\n *\n * @param {HTMLElement} el The element from which the data will be retrieved.\n * @returns {String} The data string.\n */\nexport default function getDataFromElement( el ) {\n\tif ( el instanceof HTMLTextAreaElement ) {\n\t\treturn el.value;\n\t}\n\n\treturn el.innerHTML;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/plugin\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor plugin classes.\n *\n * @implements module:core/plugin~PluginInterface\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor instance.\n\t\t *\n\t\t * Note that most editors implement the {@link module:core/editor/editorwithui~EditorWithUI} interface in addition\n\t\t * to the base {@link module:core/editor/editor~Editor} interface. However, editors with an external UI\n\t\t * (i.e. Bootstrap-based) or a headless editor may not implement the {@link module:core/editor/editorwithui~EditorWithUI}\n\t\t * interface.\n\t\t *\n\t\t * Because of above, to make plugins more universal, it is recommended to split features into:\n\t\t * - The \"editing\" part that only uses the {@link module:core/editor/editor~Editor} interface.\n\t\t * - The \"UI\" part that uses both the {@link module:core/editor/editor~Editor} interface and\n\t\t * the {@link module:core/editor/editorwithui~EditorWithUI} interface.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n}\n\nmix( Plugin, ObservableMixin );\n\n/**\n * The base interface for CKEditor plugins.\n *\n * In its minimal form a plugin can be a simple function that accepts {@link module:core/editor/editor~Editor the editor}\n * as a parameter:\n *\n *\t\t// A simple plugin that enables a data processor.\n *\t\tfunction MyPlugin( editor ) {\n *\t\t\teditor.data.processor = new MyDataProcessor();\n *\t\t}\n *\n * In most cases however, you will want to inherit from the {@link module:core/plugin~Plugin} class which implements the\n * {@link module:utils/observablemixin~ObservableMixin} and is, therefore, more convenient:\n *\n *\t\tclass MyPlugin extends Plugin {\n *\t\t\tinit() {\n *\t\t\t\t// `listenTo()` and `editor` are available thanks to `Plugin`.\n *\t\t\t\t// By using `listenTo()` you will ensure that the listener is removed when\n *\t\t\t\t// the plugin is destroyed.\n *\t\t\t\tthis.listenTo( this.editor.data, 'ready', () => {\n *\t\t\t\t\t// Do something when the data is ready.\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n * The plugin can also implement methods (e.g. {@link module:core/plugin~PluginInterface#init `init()`} or\n * {@link module:core/plugin~PluginInterface#destroy `destroy()`}) which, when present, will be used to properly\n * initialize and destroy the plugin.\n *\n * **Note:** When defined as a plain function, the plugin acts as a constructor and will be\n * called in parallel with other plugins' {@link module:core/plugin~PluginInterface#constructor constructors}.\n * This means the code of that plugin will be executed **before** {@link module:core/plugin~PluginInterface#init `init()`} and\n * {@link module:core/plugin~PluginInterface#afterInit `afterInit()`} methods of other plugins and, for instance,\n * you cannot use it to extend other plugins' {@glink framework/guides/architecture/editing-engine#schema schema}\n * rules as they are defined later on during the `init()` stage.\n *\n * @interface PluginInterface\n */\n\n/**\n * Creates a new plugin instance. This is the first step of the plugin initialization.\n * See also {@link #init} and {@link #afterInit}.\n *\n * A plugin is always instantiated after its {@link module:core/plugin~PluginInterface.requires dependencies} and the\n * {@link #init} and {@link #afterInit} methods are called in the same order.\n *\n * Usually, you will want to put your plugin's initialization code in the {@link #init} method.\n * The constructor can be understood as \"before init\" and used in special cases, just like\n * {@link #afterInit} serves the special \"after init\" scenarios (e.g.the code which depends on other\n * plugins, but which does not {@link module:core/plugin~PluginInterface.requires explicitly require} them).\n *\n * @method #constructor\n * @param {module:core/editor/editor~Editor} editor\n */\n\n/**\n * An array of plugins required by this plugin.\n *\n * To keep the plugin class definition tight it is recommended to define this property as a static getter:\n *\n *\t\timport Image from './image.js';\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get requires() {\n *\t\t\t\treturn [ Image ];\n *\t\t\t}\n *\t\t}\n *\n * @static\n * @readonly\n * @member {Array.<Function>|undefined} module:core/plugin~PluginInterface.requires\n */\n\n/**\n * An optional name of the plugin. If set, the plugin will be available in\n * {@link module:core/plugincollection~PluginCollection#get} by its\n * name and its constructor. If not, then only by its constructor.\n *\n * The name should reflect the constructor name.\n *\n * To keep the plugin class definition tight it is recommended to define this property as a static getter:\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get pluginName() {\n *\t\t\t\treturn 'ImageCaption';\n *\t\t\t}\n *\t\t}\n *\n * Note: The native `Function.name` property could not be used to keep the plugin name because\n * it will be mangled during code minification.\n *\n * Naming a plugin is necessary to enable removing it through the\n * {@link module:core/editor/editorconfig~EditorConfig#removePlugins `config.removePlugins`} option.\n *\n * @static\n * @readonly\n * @member {String|undefined} module:core/plugin~PluginInterface.pluginName\n */\n\n/**\n * The second stage (after plugin {@link #constructor}) of plugin initialization.\n * Unlike the plugin constructor this method can be asynchronous.\n *\n * A plugin's `init()` method is called after its {@link module:core/plugin~PluginInterface.requires dependencies} are initialized,\n * so in the same order as constructors of these plugins.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #init\n * @returns {null|Promise}\n */\n\n/**\n * The third (and last) stage of plugin initialization. See also {@link #constructor} and {@link #init}.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #afterInit\n * @returns {null|Promise}\n */\n\n/**\n * Destroys the plugin.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #destroy\n * @returns {null|Promise}\n */\n\n/**\n * Array of loaded plugins.\n *\n * @typedef {Array.<module:core/plugin~PluginInterface>} module:core/plugin~LoadedPlugins\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/datatransfer\n */\n\n/**\n * Facade over the native [`DataTransfer`](https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer) object.\n */\nexport default class DataTransfer {\n\tconstructor( nativeDataTransfer ) {\n\t\t/**\n\t\t * The array of files created from the native `DataTransfer#files` or `DataTransfer#items`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<File>} #files\n\t\t */\n\t\tthis.files = getFiles( nativeDataTransfer );\n\n\t\t/**\n\t\t * The native DataTransfer object.\n\t\t *\n\t\t * @private\n\t\t * @member {DataTransfer} #_native\n\t\t */\n\t\tthis._native = nativeDataTransfer;\n\t}\n\n\t/**\n\t * Returns an array of available native content types.\n\t *\n\t * @returns {Array.<String>}\n\t */\n\tget types() {\n\t\treturn this._native.types;\n\t}\n\n\t/**\n\t * Gets data from the data transfer by its mime type.\n\t *\n\t *\t\tdataTransfer.getData( 'text/plain' );\n\t *\n\t * @param {String} type The mime type. E.g. `text/html` or `text/plain`.\n\t * @returns {String}\n\t */\n\tgetData( type ) {\n\t\treturn this._native.getData( type );\n\t}\n\n\t/**\n\t * Sets data in the data transfer.\n\t *\n\t * @param {String} type The mime type. E.g. `text/html` or `text/plain`.\n\t * @param {String} data\n\t */\n\tsetData( type, data ) {\n\t\tthis._native.setData( type, data );\n\t}\n}\n\nfunction getFiles( nativeDataTransfer ) {\n\t// DataTransfer.files and items are Array-like and might not have an iterable interface.\n\tconst files = nativeDataTransfer.files ? Array.from( nativeDataTransfer.files ) : [];\n\tconst items = nativeDataTransfer.items ? Array.from( nativeDataTransfer.items ) : [];\n\n\tif ( files.length ) {\n\t\treturn files;\n\t}\n\t// Chrome have empty DataTransfer.files, but let get files through the items interface.\n\treturn items\n\t\t.filter( item => item.kind === 'file' )\n\t\t.map( item => item.getAsFile() );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/clipboardobserver\n */\n\nimport DomEventObserver from '@ckeditor/ckeditor5-engine/src/view/observer/domeventobserver';\nimport EventInfo from '@ckeditor/ckeditor5-utils/src/eventinfo';\nimport DataTransfer from './datatransfer';\n\n/**\n * Clipboard events observer.\n *\n * Fires the following events:\n *\n * * {@link module:engine/view/document~Document#event:clipboardInput}\n * * {@link module:engine/view/document~Document#event:dragover}\n * * {@link module:engine/view/document~Document#event:drop}\n * * {@link module:engine/view/document~Document#event:paste}\n * * {@link module:engine/view/document~Document#event:copy}\n * * {@link module:engine/view/document~Document#event:cut}\n *\n * Note that this observer is not available by default (it is not added by the engine).\n * To make it available it needs to be added to {@link module:engine/view/document~Document} by\n * the {@link module:engine/view/view~View#addObserver `View#addObserver()`} method. You can also load the\n * {@link module:clipboard/clipboard~Clipboard} plugin which adds this observer automatically (because it uses it).\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class ClipboardObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst viewDocument = this.document;\n\n\t\tthis.domEventType = [ 'paste', 'copy', 'cut', 'drop', 'dragover' ];\n\n\t\tthis.listenTo( viewDocument, 'paste', handleInput, { priority: 'low' } );\n\t\tthis.listenTo( viewDocument, 'drop', handleInput, { priority: 'low' } );\n\n\t\tfunction handleInput( evt, data ) {\n\t\t\tdata.preventDefault();\n\n\t\t\tconst targetRanges = data.dropRange ? [ data.dropRange ] : Array.from( viewDocument.selection.getRanges() );\n\n\t\t\tconst eventInfo = new EventInfo( viewDocument, 'clipboardInput' );\n\n\t\t\tviewDocument.fire( eventInfo, {\n\t\t\t\tdataTransfer: data.dataTransfer,\n\t\t\t\ttargetRanges\n\t\t\t} );\n\n\t\t\t// If CKEditor handled the input, do not bubble the original event any further.\n\t\t\t// This helps external integrations recognize that fact and act accordingly.\n\t\t\t// https://github.com/ckeditor/ckeditor5-upload/issues/92\n\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\tdata.stopPropagation();\n\t\t\t}\n\t\t}\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tconst evtData = {\n\t\t\tdataTransfer: new DataTransfer( domEvent.clipboardData ? domEvent.clipboardData : domEvent.dataTransfer )\n\t\t};\n\n\t\tif ( domEvent.type == 'drop' ) {\n\t\t\tevtData.dropRange = getDropViewRange( this.view, domEvent );\n\t\t}\n\n\t\tthis.fire( domEvent.type, domEvent, evtData );\n\t}\n}\n\nfunction getDropViewRange( view, domEvent ) {\n\tconst domDoc = domEvent.target.ownerDocument;\n\tconst x = domEvent.clientX;\n\tconst y = domEvent.clientY;\n\tlet domRange;\n\n\t// Webkit & Blink.\n\tif ( domDoc.caretRangeFromPoint && domDoc.caretRangeFromPoint( x, y ) ) {\n\t\tdomRange = domDoc.caretRangeFromPoint( x, y );\n\t}\n\t// FF.\n\telse if ( domEvent.rangeParent ) {\n\t\tdomRange = domDoc.createRange();\n\t\tdomRange.setStart( domEvent.rangeParent, domEvent.rangeOffset );\n\t\tdomRange.collapse( true );\n\t}\n\n\tif ( domRange ) {\n\t\treturn view.domConverter.domRangeToView( domRange );\n\t} else {\n\t\treturn view.document.selection.getFirstRange();\n\t}\n}\n\n/**\n * Fired as a continuation of {@link #event:paste} and {@link #event:drop} events.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#input-pipeline \"clipboard input pipeline\"}.\n *\n * Fired with a `dataTransfer` which comes from the clipboard and which content should be processed\n * and inserted into the editor.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:engine/view/document~Document#event:clipboardInput\n * @param {Object} data Event data.\n * @param {module:clipboard/datatransfer~DataTransfer} data.dataTransfer Data transfer instance.\n * @param {Array.<module:engine/view/range~Range>} data.targetRanges Ranges which are the target of the operation\n * (usually – into which the content should be inserted).\n * If clipboard input was triggered by a paste operation, then these are the selection ranges. If by a drop operation,\n * then it's the drop position (which can be different than the selection at the moment of drop).\n */\n\n/**\n * Fired when user drags content over one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:dragover\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user dropped content into one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:drop\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n * @param {module:engine/view/range~Range} dropRange The position into which the content is dropped.\n */\n\n/**\n * Fired when user pasted content into one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:paste\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user copied content from one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @event module:engine/view/document~Document#event:copy\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user cut content from one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @event module:engine/view/document~Document#event:cut\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * The value of the {@link module:engine/view/document~Document#event:paste},\n * {@link module:engine/view/document~Document#event:copy} and {@link module:engine/view/document~Document#event:cut} events.\n *\n * In order to access clipboard data use `dataTransfer` property.\n *\n * @class module:clipboard/clipboardobserver~ClipboardEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n */\n\n/**\n * Data transfer instance.\n *\n * @readonly\n * @member {module:clipboard/datatransfer~DataTransfer} module:clipboard/clipboardobserver~ClipboardEventData#dataTransfer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/viewtoplaintext\n */\n\n// Elements which should not have empty-line padding.\n// Most `view.ContainerElement` want to be separate by new-line, but some are creating one structure\n// together (like `<li>`) so it is better to separate them by only one \"\\n\".\nconst smallPaddingElements = [ 'figcaption', 'li' ];\n\n/**\n * Converts {@link module:engine/view/item~Item view item} and all of its children to plain text.\n *\n * @param {module:engine/view/item~Item} viewItem View item to convert.\n * @returns {String} Plain text representation of `viewItem`.\n */\nexport default function viewToPlainText( viewItem ) {\n\tlet text = '';\n\n\tif ( viewItem.is( 'text' ) || viewItem.is( 'textProxy' ) ) {\n\t\t// If item is `Text` or `TextProxy` simple take its text data.\n\t\ttext = viewItem.data;\n\t} else if ( viewItem.is( 'img' ) && viewItem.hasAttribute( 'alt' ) ) {\n\t\t// Special case for images - use alt attribute if it is provided.\n\t\ttext = viewItem.getAttribute( 'alt' );\n\t} else {\n\t\t// Other elements are document fragments, attribute elements or container elements.\n\t\t// They don't have their own text value, so convert their children.\n\t\tlet prev = null;\n\n\t\tfor ( const child of viewItem.getChildren() ) {\n\t\t\tconst childText = viewToPlainText( child );\n\n\t\t\t// Separate container element children with one or more new-line characters.\n\t\t\tif ( prev && ( prev.is( 'containerElement' ) || child.is( 'containerElement' ) ) ) {\n\t\t\t\tif ( smallPaddingElements.includes( prev.name ) || smallPaddingElements.includes( child.name ) ) {\n\t\t\t\t\ttext += '\\n';\n\t\t\t\t} else {\n\t\t\t\t\ttext += '\\n\\n';\n\t\t\t\t}\n\t\t\t}\n\n\t\t\ttext += childText;\n\t\t\tprev = child;\n\t\t}\n\t}\n\n\treturn text;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/clipboard\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport ClipboardObserver from './clipboardobserver';\n\nimport plainTextToHtml from './utils/plaintexttohtml';\nimport normalizeClipboardHtml from './utils/normalizeclipboarddata';\nimport viewToPlainText from './utils/viewtoplaintext.js';\n\nimport HtmlDataProcessor from '@ckeditor/ckeditor5-engine/src/dataprocessor/htmldataprocessor';\n\n/**\n * The clipboard feature. It is responsible for intercepting the `paste` and `drop` events and\n * passing the pasted content through the clipboard pipeline in order to insert it into the editor's content.\n * It also handles the `cut` and `copy` events to fill the native clipboard with serialized editor's data.\n *\n * Read more about the clipboard integration in {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive} guide.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Clipboard extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Clipboard';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst modelDocument = editor.model.document;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t/**\n\t\t * Data processor used to convert pasted HTML to a view structure.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/dataprocessor/htmldataprocessor~HtmlDataProcessor} #_htmlDataProcessor\n\t\t */\n\t\tthis._htmlDataProcessor = new HtmlDataProcessor();\n\n\t\tview.addObserver( ClipboardObserver );\n\n\t\t// The clipboard paste pipeline.\n\n\t\t// Pasting and dropping is disabled when editor is read-only.\n\t\t// See: https://github.com/ckeditor/ckeditor5-clipboard/issues/26.\n\t\tthis.listenTo( viewDocument, 'clipboardInput', evt => {\n\t\t\tif ( editor.isReadOnly ) {\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( viewDocument, 'clipboardInput', ( evt, data ) => {\n\t\t\tconst dataTransfer = data.dataTransfer;\n\t\t\tlet content = '';\n\n\t\t\tif ( dataTransfer.getData( 'text/html' ) ) {\n\t\t\t\tcontent = normalizeClipboardHtml( dataTransfer.getData( 'text/html' ) );\n\t\t\t} else if ( dataTransfer.getData( 'text/plain' ) ) {\n\t\t\t\tcontent = plainTextToHtml( dataTransfer.getData( 'text/plain' ) );\n\t\t\t}\n\n\t\t\tcontent = this._htmlDataProcessor.toView( content );\n\n\t\t\tthis.fire( 'inputTransformation', { content, dataTransfer } );\n\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\n\t\tthis.listenTo( this, 'inputTransformation', ( evt, data ) => {\n\t\t\tif ( !data.content.isEmpty ) {\n\t\t\t\tconst dataController = this.editor.data;\n\t\t\t\tconst model = this.editor.model;\n\n\t\t\t\t// Convert the pasted content to a model document fragment.\n\t\t\t\t// Conversion is contextual, but in this case we need an \"all allowed\" context and for that\n\t\t\t\t// we use the $clipboardHolder item.\n\t\t\t\tconst modelFragment = dataController.toModel( data.content, '$clipboardHolder' );\n\n\t\t\t\tif ( modelFragment.childCount == 0 ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tmodel.insertContent( modelFragment );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// The clipboard copy/cut pipeline.\n\n\t\tfunction onCopyCut( evt, data ) {\n\t\t\tconst dataTransfer = data.dataTransfer;\n\n\t\t\tdata.preventDefault();\n\n\t\t\tconst content = editor.data.toView( editor.model.getSelectedContent( modelDocument.selection ) );\n\n\t\t\tviewDocument.fire( 'clipboardOutput', { dataTransfer, content, method: evt.name } );\n\t\t}\n\n\t\tthis.listenTo( viewDocument, 'copy', onCopyCut, { priority: 'low' } );\n\t\tthis.listenTo( viewDocument, 'cut', ( evt, data ) => {\n\t\t\t// Cutting is disabled when editor is read-only.\n\t\t\t// See: https://github.com/ckeditor/ckeditor5-clipboard/issues/26.\n\t\t\tif ( editor.isReadOnly ) {\n\t\t\t\tdata.preventDefault();\n\t\t\t} else {\n\t\t\t\tonCopyCut( evt, data );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\tthis.listenTo( viewDocument, 'clipboardOutput', ( evt, data ) => {\n\t\t\tif ( !data.content.isEmpty ) {\n\t\t\t\tdata.dataTransfer.setData( 'text/html', this._htmlDataProcessor.toData( data.content ) );\n\t\t\t\tdata.dataTransfer.setData( 'text/plain', viewToPlainText( data.content ) );\n\t\t\t}\n\n\t\t\tif ( data.method == 'cut' ) {\n\t\t\t\teditor.model.deleteContent( modelDocument.selection );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\t}\n}\n\n/**\n * Fired with a `content` and `dataTransfer` objects. The `content` which comes from the clipboard (was pasted or dropped)\n * should be processed in order to be inserted into the editor. The `dataTransfer` object is available\n * in case the transformation functions needs access to a raw clipboard data.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#input-pipeline \"clipboard input pipeline\"}.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:clipboard/clipboard~Clipboard#event:inputTransformation\n * @param {Object} data Event data.\n * @param {module:engine/view/documentfragment~DocumentFragment} data.content Event data. Content to be inserted into the editor.\n * It can be modified by the event listeners. Read more about the clipboard pipelines in\n * {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive}.\n * @param {module:clipboard/datatransfer~DataTransfer} data.dataTransfer Data transfer instance.\n */\n\n/**\n * Fired on {@link module:engine/view/document~Document#event:copy} and {@link module:engine/view/document~Document#event:cut}\n * with a copy of selected content. The content can be processed before it ends up in the clipboard.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#output-pipeline \"clipboard output pipeline\"}.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:engine/view/document~Document#event:clipboardOutput\n * @param {module:clipboard/clipboard~ClipboardOutputEventData} data Event data.\n */\n\n/**\n * The value of the {@link module:engine/view/document~Document#event:clipboardOutput} event.\n *\n * @class module:clipboard/clipboard~ClipboardOutputEventData\n */\n\n/**\n * Data transfer instance.\n *\n * @readonly\n * @member {module:clipboard/datatransfer~DataTransfer} module:clipboard/clipboard~ClipboardOutputEventData#dataTransfer\n */\n\n/**\n * Content to be put into the clipboard. It can be modified by the event listeners.\n * Read more about the clipboard pipelines in {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive}.\n *\n * @member {module:engine/view/documentfragment~DocumentFragment} module:clipboard/clipboard~ClipboardOutputEventData#content\n */\n\n/**\n * Whether the event was triggered by copy or cut operation.\n *\n * @member {'copy'|'cut'} module:clipboard/clipboard~ClipboardOutputEventData#method\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/normalizeclipboarddata\n */\n\n/**\n * Removes some popular browser quirks out of the clipboard data (HTML).\n *\n * @param {String} data The HTML data to normalize.\n * @returns {String} Normalized HTML.\n */\nexport default function normalizeClipboardData( data ) {\n\treturn data\n\t\t.replace( /<span(?: class=\"Apple-converted-space\"|)>(\\s+)<\\/span>/g, ( fullMatch, spaces ) => {\n\t\t\t// Handle the most popular and problematic case when even a single space becomes an nbsp;.\n\t\t\t// Decode those to normal spaces. Read more in https://github.com/ckeditor/ckeditor5-clipboard/issues/2.\n\t\t\tif ( spaces.length == 1 ) {\n\t\t\t\treturn ' ';\n\t\t\t}\n\n\t\t\treturn spaces;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/plaintexttohtml\n */\n\n/**\n * Converts plain text to its HTML-ized version.\n *\n * @param {String} text The plain text to convert.\n * @returns {String} HTML generated from the plain text.\n */\nexport default function plainTextToHtml( text ) {\n\ttext = text\n\t\t// Encode <>.\n\t\t.replace( /</g, '<' )\n\t\t.replace( />/g, '>' )\n\t\t// Creates paragraphs for every line breaks.\n\t\t.replace( /\\n/g, '</p><p>' )\n\t\t// Preserve trailing spaces (only the first and last one – the rest is handled below).\n\t\t.replace( /^\\s/, ' ' )\n\t\t.replace( /\\s$/, ' ' )\n\t\t// Preserve other subsequent spaces now.\n\t\t.replace( /\\s\\s/g, '  ' );\n\n\tif ( text.indexOf( '</p><p>' ) > -1 ) {\n\t\t// If we created paragraphs above, add the trailing ones.\n\t\ttext = `<p>${ text }</p>`;\n\t}\n\n\t// TODO:\n\t// * What about '\\nfoo' vs ' foo'?\n\n\treturn text;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/command\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor commands.\n *\n * Commands are the main way to manipulate editor contents and state. They are mostly used by UI elements (or by other\n * commands) to make changes in the model. Commands are available in every part of code that has access to\n * the {@link module:core/editor/editor~Editor editor} instance.\n *\n * Instances of registered commands can be retrieved from {@link module:core/editor/editor~Editor#commands `editor.commands`}.\n * The easiest way to execute a command is through {@link module:core/editor/editor~Editor#execute `editor.execute()`}.\n *\n * By default commands are disabled when the editor is in {@link module:core/editor/editor~Editor#isReadOnly read-only} mode.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Command {\n\t/**\n\t * Creates a new `Command` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor Editor on which this command will be used.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor on which this command will be used.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * The value of the command. A concrete command class should define what it represents for it.\n\t\t *\n\t\t * For example, the `'bold'` command's value indicates whether the selection starts in a bolded text.\n\t\t * And the value of the `'link'` command may be an object with links details.\n\t\t *\n\t\t * It is possible for a command to have no value (e.g. for stateless actions such as `'imageUpload'`).\n\t\t *\n\t\t * A concrete command class should control this value by overriding the {@link #refresh `refresh()`} method.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member #value\n\t\t */\n\t\tthis.set( 'value', undefined );\n\n\t\t/**\n\t\t * Flag indicating whether a command is enabled or disabled.\n\t\t * A disabled command will do nothing when executed.\n\t\t *\n\t\t * A concrete command class should control this value by overriding the {@link #refresh `refresh()`} method.\n\t\t *\n\t\t * It is possible to disable a command from \"outside\". For instance, in your integration you may want to disable\n\t\t * a certain set of commands for the time being. To do that, you can use the fact that `isEnabled` is observable\n\t\t * and it fires the `set:isEnabled` event every time anyone tries to modify its value:\n\t\t *\n\t\t *\t\tfunction disableCommand( cmd ) {\n\t\t *\t\t\tcmd.on( 'set:isEnabled', forceDisable, { priority: 'highest' } );\n\t\t *\n\t\t *\t\t\tcmd.isEnabled = false;\n\t\t *\n\t\t *\t\t\t// Make it possible to enable the command again.\n\t\t *\t\t\treturn () => {\n\t\t *\t\t\t\tcmd.off( 'set:isEnabled', forceDisable );\n\t\t *\t\t\t\tcmd.refresh();\n\t\t *\t\t\t};\n\t\t *\n\t\t *\t\t\tfunction forceDisable( evt ) {\n\t\t *\t\t\t\tevt.return = false;\n\t\t *\t\t\t\tevt.stop();\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t *\t\t// Usage:\n\t\t *\n\t\t *\t\t// Disabling the command.\n\t\t *\t\tconst enableBold = disableCommand( editor.commands.get( 'bold' ) );\n\t\t *\n\t\t *\t\t// Enabling the command again.\n\t\t *\t\tenableBold();\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', false );\n\n\t\t/**\n\t\t * Holds identifiers for {@link #forceDisabled} mechanism.\n\t\t *\n\t\t * @type {Set.<String>}\n\t\t * @private\n\t\t */\n\t\tthis._disableStack = new Set();\n\n\t\tthis.decorate( 'execute' );\n\n\t\t// By default every command is refreshed when changes are applied to the model.\n\t\tthis.listenTo( this.editor.model.document, 'change', () => {\n\t\t\tthis.refresh();\n\t\t} );\n\n\t\tthis.on( 'execute', evt => {\n\t\t\tif ( !this.isEnabled ) {\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\n\t\t// By default commands are disabled when the editor is in read-only mode.\n\t\tthis.listenTo( editor, 'change:isReadOnly', ( evt, name, value ) => {\n\t\t\tif ( value ) {\n\t\t\t\tthis.forceDisabled( 'readOnlyMode' );\n\t\t\t} else {\n\t\t\t\tthis.clearForceDisabled( 'readOnlyMode' );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Refreshes the command. The command should update its {@link #isEnabled} and {@link #value} properties\n\t * in this method.\n\t *\n\t * This method is automatically called when\n\t * {@link module:engine/model/document~Document#event:change any changes are applied to the document}.\n\t */\n\trefresh() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the command.\n\t *\n\t * Command may be disabled by multiple features or algorithms (at once). When disabling a command, unique id should be passed\n\t * (e.g. feature name). The same identifier should be used when {@link #clearForceDisabled enabling back} the command.\n\t * The command becomes enabled only after all features {@link #clearForceDisabled enabled it back}.\n\t *\n\t * Disabling and enabling a command:\n\t *\n\t *\t\tcommand.isEnabled; // -> true\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> false\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * Command disabled by multiple features:\n\t *\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.forceDisabled( 'OtherFeature' );\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> false\n\t *\t\tcommand.clearForceDisabled( 'OtherFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * Multiple disabling with the same identifier is redundant:\n\t *\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * **Note:** some commands or algorithms may have more complex logic when it comes to enabling or disabling certain commands,\n\t * so the command might be still disabled after {@link #clearForceDisabled} was used.\n\t *\n\t * @param {String} id Unique identifier for disabling. Use the same id when {@link #clearForceDisabled enabling back} the command.\n\t */\n\tforceDisabled( id ) {\n\t\tthis._disableStack.add( id );\n\n\t\tif ( this._disableStack.size == 1 ) {\n\t\t\tthis.on( 'set:isEnabled', forceDisable, { priority: 'highest' } );\n\t\t\tthis.isEnabled = false;\n\t\t}\n\t}\n\n\t/**\n\t * Clears forced disable previously set through {@link #clearForceDisabled}. See {@link #clearForceDisabled}.\n\t *\n\t * @param {String} id Unique identifier, equal to the one passed in {@link #forceDisabled} call.\n\t */\n\tclearForceDisabled( id ) {\n\t\tthis._disableStack.delete( id );\n\n\t\tif ( this._disableStack.size == 0 ) {\n\t\t\tthis.off( 'set:isEnabled', forceDisable );\n\t\t\tthis.refresh();\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * A command may accept parameters. They will be passed from {@link module:core/editor/editor~Editor#execute `editor.execute()`}\n\t * to the command.\n\t *\n\t * The `execute()` method will automatically abort when the command is disabled ({@link #isEnabled} is `false`).\n\t * This behavior is implemented by a high priority listener to the {@link #event:execute} event.\n\t *\n\t * In order to see how to disable a command from \"outside\" see the {@link #isEnabled} documentation.\n\t *\n\t * @fires execute\n\t */\n\texecute() {}\n\n\t/**\n\t * Destroys the command.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Event fired by the {@link #execute} method. The command action is a listener to this event so it's\n\t * possible to change/cancel the behavior of the command by listening to this event.\n\t *\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * **Note:** This event is fired even if command is disabled. However, it is automatically blocked\n\t * by a high priority listener in order to prevent command execution.\n\t *\n\t * @event execute\n\t */\n}\n\nmix( Command, ObservableMixin );\n\n// Helper function that forces command to be disabled.\nfunction forceDisable( evt ) {\n\tevt.return = false;\n\tevt.stop();\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/entercommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { getCopyOnEnterAttributes } from './utils';\n\n/**\n * Enter command. It is used by the {@link module:enter/enter~Enter Enter feature} to handle the <kbd>Enter</kbd> key.\n *\n * @extends module:core/command~Command\n */\nexport default class EnterCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tenterBlock( this.editor.model, writer, doc.selection, model.schema );\n\t\t\tthis.fire( 'afterExecute', { writer } );\n\t\t} );\n\t}\n}\n\n// Creates a new block in the way that the <kbd>Enter</kbd> key is expected to work.\n//\n// @param {module:engine/model~Model} model\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n// Selection on which the action should be performed.\n// @param {module:engine/model/schema~Schema} schema\nfunction enterBlock( model, writer, selection, schema ) {\n\tconst isSelectionEmpty = selection.isCollapsed;\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\n\t// Don't touch the roots and other limit elements.\n\tif ( schema.isLimit( startElement ) || schema.isLimit( endElement ) ) {\n\t\t// Delete the selected content but only if inside a single limit element.\n\t\t// Abort, when crossing limit elements boundary (e.g. <limit1>x[x</limit1>donttouchme<limit2>y]y</limit2>).\n\t\t// This is an edge case and it's hard to tell what should actually happen because such a selection\n\t\t// is not entirely valid.\n\t\tif ( !isSelectionEmpty && startElement == endElement ) {\n\t\t\tmodel.deleteContent( selection );\n\t\t}\n\n\t\treturn;\n\t}\n\n\tif ( isSelectionEmpty ) {\n\t\tconst attributesToCopy = getCopyOnEnterAttributes( writer.model.schema, selection.getAttributes() );\n\t\tsplitBlock( writer, range.start );\n\t\twriter.setSelectionAttribute( attributesToCopy );\n\t} else {\n\t\tconst leaveUnmerged = !( range.start.isAtStart && range.end.isAtEnd );\n\t\tconst isContainedWithinOneElement = ( startElement == endElement );\n\n\t\tmodel.deleteContent( selection, { leaveUnmerged } );\n\n\t\tif ( leaveUnmerged ) {\n\t\t\t// Partially selected elements.\n\t\t\t//\n\t\t\t// <h>x[xx]x</h>\t\t-> <h>x^x</h>\t\t\t-> <h>x</h><h>^x</h>\n\t\t\tif ( isContainedWithinOneElement ) {\n\t\t\t\tsplitBlock( writer, selection.focus );\n\t\t\t}\n\t\t\t// Selection over multiple elements.\n\t\t\t//\n\t\t\t// <h>x[x</h><p>y]y<p>\t-> <h>x^</h><p>y</p>\t-> <h>x</h><p>^y</p>\n\t\t\telse {\n\t\t\t\twriter.setSelection( endElement, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction splitBlock( writer, splitPos ) {\n\twriter.split( splitPos );\n\twriter.setSelection( splitPos.parent.nextSibling, 0 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/enterobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\nimport DomEventData from '@ckeditor/ckeditor5-engine/src/view/observer/domeventdata';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Enter observer introduces the {@link module:engine/view/document~Document#event:enter} event.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class EnterObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst doc = this.document;\n\n\t\tdoc.on( 'keydown', ( evt, data ) => {\n\t\t\tif ( this.isEnabled && data.keyCode == keyCodes.enter ) {\n\t\t\t\t// Save the event object to check later if it was stopped or not.\n\t\t\t\tlet event;\n\t\t\t\tdoc.once( 'enter', evt => ( event = evt ), { priority: 'highest' } );\n\n\t\t\t\tdoc.fire( 'enter', new DomEventData( doc, data.domEvent, {\n\t\t\t\t\tisSoft: data.shiftKey\n\t\t\t\t} ) );\n\n\t\t\t\t// Stop `keydown` event if `enter` event was stopped.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5/issues/753\n\t\t\t\tif ( event && event.stop.called ) {\n\t\t\t\t\tevt.stop();\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {}\n}\n\n/**\n * Event fired when the user presses the <kbd>Enter</kbd> key.\n *\n * Note: This event is fired by the {@link module:enter/enterobserver~EnterObserver observer}\n * (usually registered by the {@link module:enter/enter~Enter Enter feature} and\n * {@link module:enter/shiftenter~ShiftEnter ShiftEnter feature}).\n *\n * @event module:engine/view/document~Document#event:enter\n * @param {module:engine/view/observer/domeventdata~DomEventData} data\n * @param {Boolean} data.isSoft Whether it's a soft enter (<kbd>Shift</kbd>+<kbd>Enter</kbd>) or hard enter (<kbd>Enter</kbd>).\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/enter\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport EnterCommand from './entercommand';\nimport EnterObserver from './enterobserver';\n\n/**\n * This plugin handles the <kbd>Enter</kbd> key (hard line break) in the editor.\n *\n * See also the {@link module:enter/shiftenter~ShiftEnter} plugin.\n *\n * For more information about this feature see the {@glink api/enter package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Enter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Enter';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\tview.addObserver( EnterObserver );\n\n\t\teditor.commands.add( 'enter', new EnterCommand( editor ) );\n\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tdata.preventDefault();\n\n\t\t\t// The soft enter key is handled by the ShiftEnter plugin.\n\t\t\tif ( data.isSoft ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\teditor.execute( 'enter' );\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/shiftentercommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { getCopyOnEnterAttributes } from './utils';\n\n/**\n * ShiftEnter command. It is used by the {@link module:enter/shiftenter~ShiftEnter ShiftEnter feature} to handle\n * the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke.\n *\n * @extends module:core/command~Command\n */\nexport default class ShiftEnterCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tsoftBreakAction( model, writer, doc.selection );\n\t\t\tthis.fire( 'afterExecute', { writer } );\n\t\t} );\n\t}\n\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.isEnabled = isEnabled( model.schema, doc.selection );\n\t}\n}\n\n// Checks whether the ShiftEnter command should be enabled in the specified selection.\n//\n// @param {module:engine/model/schema~Schema} schema\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\nfunction isEnabled( schema, selection ) {\n\t// At this moment it is okay to support single range selections only.\n\t// But in the future we may need to change that.\n\tif ( selection.rangeCount > 1 ) {\n\t\treturn false;\n\t}\n\n\tconst anchorPos = selection.anchor;\n\n\t// Check whether the break element can be inserted in the current selection anchor.\n\tif ( !anchorPos || !schema.checkChild( anchorPos, 'softBreak' ) ) {\n\t\treturn false;\n\t}\n\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\n\t// Do not modify the content if selection is cross-limit elements.\n\tif ( ( isInsideLimitElement( startElement, schema ) || isInsideLimitElement( endElement, schema ) ) && startElement !== endElement ) {\n\t\treturn false;\n\t}\n\n\treturn true;\n}\n\n// Creates a break in the way that the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke is expected to work.\n//\n// @param {module:engine/model~Model} model\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n// Selection on which the action should be performed.\nfunction softBreakAction( model, writer, selection ) {\n\tconst isSelectionEmpty = selection.isCollapsed;\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\tconst isContainedWithinOneElement = ( startElement == endElement );\n\n\tif ( isSelectionEmpty ) {\n\t\tconst attributesToCopy = getCopyOnEnterAttributes( model.schema, selection.getAttributes() );\n\t\tinsertBreak( writer, range.end );\n\n\t\twriter.removeSelectionAttribute( selection.getAttributeKeys() );\n\t\twriter.setSelectionAttribute( attributesToCopy );\n\t} else {\n\t\tconst leaveUnmerged = !( range.start.isAtStart && range.end.isAtEnd );\n\t\tmodel.deleteContent( selection, { leaveUnmerged } );\n\n\t\t// Selection within one element:\n\t\t//\n\t\t// <h>x[xx]x</h>\t\t-> <h>x^x</h>\t\t\t-> <h>x<br>^x</h>\n\t\tif ( isContainedWithinOneElement ) {\n\t\t\tinsertBreak( writer, selection.focus );\n\t\t}\n\t\t// Selection over multiple elements.\n\t\t//\n\t\t// <h>x[x</h><p>y]y<p>\t-> <h>x^</h><p>y</p>\t-> <h>x</h><p>^y</p>\n\t\t//\n\t\t// We chose not to insert a line break in this case because:\n\t\t//\n\t\t// * it's not a very common scenario,\n\t\t// * it actually surprised me when I saw the \"expected behavior\" in real life.\n\t\t//\n\t\t// It's ok if the user will need to be more specific where they want the <br> to be inserted.\n\t\telse {\n\t\t\t// Move the selection to the 2nd element (last step of the example above).\n\t\t\tif ( leaveUnmerged ) {\n\t\t\t\twriter.setSelection( endElement, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction insertBreak( writer, position ) {\n\tconst breakLineElement = writer.createElement( 'softBreak' );\n\n\twriter.insert( breakLineElement, position );\n\twriter.setSelection( breakLineElement, 'after' );\n}\n\n// Checks whether the specified `element` is a child of the limit element.\n//\n// Checking whether the `<p>` element is inside a limit element:\n// - <$root><p>Text.</p></$root> => false\n// - <$root><limitElement><p>Text</p></limitElement></$root> => true\n//\n// @param {module:engine/model/element~Element} element\n// @param {module:engine/schema~Schema} schema\n// @returns {Boolean}\nfunction isInsideLimitElement( element, schema ) {\n\t// `$root` is a limit element but in this case is an invalid element.\n\tif ( element.is( 'rootElement' ) ) {\n\t\treturn false;\n\t}\n\n\treturn schema.isLimit( element ) || isInsideLimitElement( element.parent, schema );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/injectunsafekeystrokeshandling\n */\n\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Handles keystrokes which are unsafe for typing. This handler's logic is explained\n * in https://github.com/ckeditor/ckeditor5-typing/issues/83#issuecomment-398690251.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport default function injectUnsafeKeystrokesHandling( editor ) {\n\tlet latestCompositionSelection = null;\n\n\tconst model = editor.model;\n\tconst view = editor.editing.view;\n\tconst inputCommand = editor.commands.get( 'input' );\n\n\t// For Android, we want to handle keystrokes on `beforeinput` to be sure that code in `DeleteObserver` already had a chance to be fired.\n\tif ( env.isAndroid ) {\n\t\tview.document.on( 'beforeinput', ( evt, evtData ) => handleUnsafeKeystroke( evtData ), { priority: 'lowest' } );\n\t} else {\n\t\tview.document.on( 'keydown', ( evt, evtData ) => handleUnsafeKeystroke( evtData ), { priority: 'lowest' } );\n\t}\n\n\tview.document.on( 'compositionstart', handleCompositionStart, { priority: 'lowest' } );\n\n\tview.document.on( 'compositionend', () => {\n\t\tlatestCompositionSelection = model.createSelection( model.document.selection );\n\t}, { priority: 'lowest' } );\n\n\t// Handles the keydown event. We need to guess whether such keystroke is going to result\n\t// in typing. If so, then before character insertion happens, any selected content needs\n\t// to be deleted. Otherwise the default browser deletion mechanism would be\n\t// triggered, resulting in:\n\t//\n\t// * Hundreds of mutations which could not be handled.\n\t// * But most importantly, loss of control over how the content is being deleted.\n\t//\n\t// The method is used in a low-priority listener, hence allowing other listeners (e.g. delete or enter features)\n\t// to handle the event.\n\t//\n\t// @param {module:engine/view/observer/keyobserver~KeyEventData} evtData\n\tfunction handleUnsafeKeystroke( evtData ) {\n\t\tconst doc = model.document;\n\t\tconst isComposing = view.document.isComposing;\n\t\tconst isSelectionUnchanged = latestCompositionSelection && latestCompositionSelection.isEqual( doc.selection );\n\n\t\t// Reset stored composition selection.\n\t\tlatestCompositionSelection = null;\n\n\t\t// By relying on the state of the input command we allow disabling the entire input easily\n\t\t// by just disabling the input command. We could’ve used here the delete command but that\n\t\t// would mean requiring the delete feature which would block loading one without the other.\n\t\t// We could also check the editor.isReadOnly property, but that wouldn't allow to block\n\t\t// the input without blocking other features.\n\t\tif ( !inputCommand.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( isSafeKeystroke( evtData ) || doc.selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If during composition, deletion should be prevented as it may remove composed sequence (#83).\n\t\tif ( isComposing && evtData.keyCode === 229 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If there is a `keydown` event fired with '229' keycode it might be related\n\t\t// to recent composition. Check if selection is the same as upon ending recent composition,\n\t\t// if so do not remove selected content as it will remove composed sequence (#83).\n\t\tif ( !isComposing && evtData.keyCode === 229 && isSelectionUnchanged ) {\n\t\t\treturn;\n\t\t}\n\n\t\tdeleteSelectionContent();\n\t}\n\n\t// Handles the `compositionstart` event. It is used only in special cases to remove the contents\n\t// of a non-collapsed selection so composition itself does not result in complex mutations.\n\t//\n\t// The special case mentioned above is a situation in which the `keydown` event is fired after\n\t// `compositionstart` event. In such cases {@link #handleKeydown} cannot clear current selection\n\t// contents (because it is too late and will break the composition) so the composition handler takes care of it.\n\tfunction handleCompositionStart() {\n\t\tconst doc = model.document;\n\t\tconst isFlatSelection = doc.selection.rangeCount === 1 ? doc.selection.getFirstRange().isFlat : true;\n\n\t\t// If on `compositionstart` there is a non-collapsed selection which start and end have different parents\n\t\t// it means the `handleKeydown()` method did not remove its contents. It happens usually because\n\t\t// of different order of events (`compositionstart` before `keydown` - in Safari). In such cases\n\t\t// we need to remove selection contents on composition start (#83).\n\t\tif ( doc.selection.isCollapsed || isFlatSelection ) {\n\t\t\treturn;\n\t\t}\n\n\t\tdeleteSelectionContent();\n\t}\n\n\tfunction deleteSelectionContent() {\n\t\tconst buffer = inputCommand.buffer;\n\n\t\tbuffer.lock();\n\n\t\tmodel.enqueueChange( buffer.batch, () => {\n\t\t\tmodel.deleteContent( model.document.selection );\n\t\t} );\n\n\t\tbuffer.unlock();\n\t}\n}\n\nconst safeKeycodes = [\n\tgetCode( 'arrowUp' ),\n\tgetCode( 'arrowRight' ),\n\tgetCode( 'arrowDown' ),\n\tgetCode( 'arrowLeft' ),\n\t9, // Tab\n\t16, // Shift\n\t17, // Ctrl\n\t18, // Alt\n\t19, // Pause\n\t20, // CapsLock\n\t27, // Escape\n\t33, // PageUp\n\t34, // PageDown\n\t35, // Home\n\t36, // End,\n\t45, // Insert,\n\t91, // Windows,\n\t93, // Menu key,\n\t144, // NumLock\n\t145, // ScrollLock,\n\t173, // Mute/Unmute\n\t174, // Volume up\n\t175, // Volume down,\n\t176, // Next song,\n\t177, // Previous song,\n\t178, // Stop,\n\t179, // Play/Pause,\n\t255 // Display brightness (increase and decrease)\n];\n\n// Function keys.\nfor ( let code = 112; code <= 135; code++ ) {\n\tsafeKeycodes.push( code );\n}\n\n// Returns `true` if a keystroke should not cause any content change caused by \"typing\".\n//\n// Note: This implementation is very simple and will need to be refined with time.\n//\n// @private\n// @param {engine.view.observer.keyObserver.KeyEventData} keyData\n// @returns {Boolean}\nfunction isSafeKeystroke( keyData ) {\n\t// Keystrokes which contain Ctrl don't represent typing.\n\tif ( keyData.ctrlKey ) {\n\t\treturn true;\n\t}\n\n\treturn safeKeycodes.includes( keyData.keyCode );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/shiftenter\n */\n\nimport ShiftEnterCommand from './shiftentercommand';\nimport EnterObserver from './enterobserver';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * This plugin handles the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke (soft line break) in the editor.\n *\n * See also the {@link module:enter/enter~Enter} plugin.\n *\n * For more information about this feature see the {@glink api/enter package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ShiftEnter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ShiftEnter';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\t\tconst conversion = editor.conversion;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t// Configure the schema.\n\t\tschema.register( 'softBreak', {\n\t\t\tallowWhere: '$text',\n\t\t\tisInline: true\n\t\t} );\n\n\t\t// Configure converters.\n\t\tconversion.for( 'upcast' )\n\t\t\t.elementToElement( {\n\t\t\t\tmodel: 'softBreak',\n\t\t\t\tview: 'br'\n\t\t\t} );\n\n\t\tconversion.for( 'downcast' )\n\t\t\t.elementToElement( {\n\t\t\t\tmodel: 'softBreak',\n\t\t\t\tview: ( modelElement, viewWriter ) => viewWriter.createEmptyElement( 'br' )\n\t\t\t} );\n\n\t\tview.addObserver( EnterObserver );\n\n\t\teditor.commands.add( 'shiftEnter', new ShiftEnterCommand( editor ) );\n\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tdata.preventDefault();\n\n\t\t\t// The hard enter key is handled by the Enter plugin.\n\t\t\tif ( !data.isSoft ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\teditor.execute( 'shiftEnter' );\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/changebuffer\n */\n\n/**\n * Change buffer allows to group atomic changes (like characters that have been typed) into\n * {@link module:engine/model/batch~Batch batches}.\n *\n * Batches represent single undo steps, hence changes added to one single batch are undone together.\n *\n * The buffer has a configurable limit of atomic changes that it can accommodate. After the limit was\n * exceeded (see {@link ~ChangeBuffer#input}), a new batch is created in {@link ~ChangeBuffer#batch}.\n *\n * To use the change buffer you need to let it know about the number of changes that were added to the batch:\n *\n *\t\tconst buffer = new ChangeBuffer( model, LIMIT );\n *\n *\t\t// Later on in your feature:\n *\t\tbuffer.batch.insert( pos, insertedCharacters );\n *\t\tbuffer.input( insertedCharacters.length );\n *\n */\nexport default class ChangeBuffer {\n\t/**\n\t * Creates a new instance of the change buffer.\n\t *\n\t * @param {module:engine/model/model~Model} model\n\t * @param {Number} [limit=20] The maximum number of atomic changes which can be contained in one batch.\n\t */\n\tconstructor( model, limit = 20 ) {\n\t\t/**\n\t\t * The model instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model} #model\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The number of atomic changes in the buffer. Once it exceeds the {@link #limit},\n\t\t * the {@link #batch batch} is set to a new one.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #size\n\t\t */\n\t\tthis.size = 0;\n\n\t\t/**\n\t\t * The maximum number of atomic changes which can be contained in one batch.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #limit\n\t\t */\n\t\tthis.limit = limit;\n\n\t\t/**\n\t\t * Whether the buffer is locked. A locked buffer cannot be reset unless it gets unlocked.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isLocked\n\t\t */\n\t\tthis.isLocked = false;\n\n\t\t// The function to be called in order to notify the buffer about batches which appeared in the document.\n\t\t// The callback will check whether it is a new batch and in that case the buffer will be flushed.\n\t\t//\n\t\t// The reason why the buffer needs to be flushed whenever a new batch appears is that the changes added afterwards\n\t\t// should be added to a new batch. For instance, when the user types, then inserts an image, and then types again,\n\t\t// the characters typed after inserting the image should be added to a different batch than the characters typed before.\n\t\tthis._changeCallback = ( evt, batch ) => {\n\t\t\tif ( batch.type != 'transparent' && batch !== this._batch ) {\n\t\t\t\tthis._reset( true );\n\t\t\t}\n\t\t};\n\n\t\tthis._selectionChangeCallback = () => {\n\t\t\tthis._reset();\n\t\t};\n\n\t\tthis.model.document.on( 'change', this._changeCallback );\n\n\t\tthis.model.document.selection.on( 'change:range', this._selectionChangeCallback );\n\t\tthis.model.document.selection.on( 'change:attribute', this._selectionChangeCallback );\n\n\t\t/**\n\t\t * The current batch instance.\n\t\t *\n\t\t * @private\n\t\t * @member #_batch\n\t\t */\n\n\t\t/**\n\t\t * The callback to document the change event which later needs to be removed.\n\t\t *\n\t\t * @private\n\t\t * @member #_changeCallback\n\t\t */\n\n\t\t/**\n\t\t * The callback to document selection `change:attribute` and `change:range` events which resets the buffer.\n\t\t *\n\t\t * @private\n\t\t * @member #_selectionChangeCallback\n\t\t */\n\t}\n\n\t/**\n\t * The current batch to which a feature should add its operations. Once the {@link #size}\n\t * is reached or exceeds the {@link #limit}, the batch is set to a new instance and the size is reset.\n\t *\n\t * @type {module:engine/model/batch~Batch}\n\t */\n\tget batch() {\n\t\tif ( !this._batch ) {\n\t\t\tthis._batch = this.model.createBatch();\n\t\t}\n\n\t\treturn this._batch;\n\t}\n\n\t/**\n\t * The input number of changes into the buffer. Once the {@link #size} is\n\t * reached or exceeds the {@link #limit}, the batch is set to a new instance and the size is reset.\n\t *\n\t * @param {Number} changeCount The number of atomic changes to input.\n\t */\n\tinput( changeCount ) {\n\t\tthis.size += changeCount;\n\n\t\tif ( this.size >= this.limit ) {\n\t\t\tthis._reset( true );\n\t\t}\n\t}\n\n\t/**\n\t * Locks the buffer.\n\t */\n\tlock() {\n\t\tthis.isLocked = true;\n\t}\n\n\t/**\n\t * Unlocks the buffer.\n\t */\n\tunlock() {\n\t\tthis.isLocked = false;\n\t}\n\n\t/**\n\t * Destroys the buffer.\n\t */\n\tdestroy() {\n\t\tthis.model.document.off( 'change', this._changeCallback );\n\t\tthis.model.document.selection.off( 'change:range', this._selectionChangeCallback );\n\t\tthis.model.document.selection.off( 'change:attribute', this._selectionChangeCallback );\n\t}\n\n\t/**\n\t * Resets the change buffer.\n\t *\n\t * @private\n\t * @param {Boolean} [ignoreLock] Whether internal lock {@link #isLocked} should be ignored.\n\t */\n\t_reset( ignoreLock ) {\n\t\tif ( !this.isLocked || ignoreLock ) {\n\t\t\tthis._batch = null;\n\t\t\tthis.size = 0;\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/inputcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport ChangeBuffer from './utils/changebuffer';\n\n/**\n * The input command. Used by the {@link module:typing/input~Input input feature} to handle typing.\n *\n * @extends module:core/command~Command\n */\nexport default class InputCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {Number} undoStepSize The maximum number of atomic changes\n\t * which can be contained in one batch in the command buffer.\n\t */\n\tconstructor( editor, undoStepSize ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Typing's change buffer used to group subsequent changes into batches.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {module:typing/utils/changebuffer~ChangeBuffer} #_buffer\n\t\t */\n\t\tthis._buffer = new ChangeBuffer( editor.model, undoStepSize );\n\n\t\t/**\n\t\t * Stores batches created by the input command. The batches are used to differentiate input batches from other batches using\n\t\t * {@link module:typing/input~Input#isInput} method.\n\t\t *\n\t\t * @type {WeakSet<module:engine/model/batch~Batch>}\n\t\t * @protected\n\t\t */\n\t\tthis._batches = new WeakSet();\n\t}\n\n\t/**\n\t * The current change buffer.\n\t *\n\t * @type {module:typing/utils/changebuffer~ChangeBuffer}\n\t */\n\tget buffer() {\n\t\treturn this._buffer;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._buffer.destroy();\n\t}\n\n\t/**\n\t * Executes the input command. It replaces the content within the given range with the given text.\n\t * Replacing is a two step process, first the content within the range is removed and then the new text is inserted\n\t * at the beginning of the range (which after the removal is a collapsed range).\n\t *\n\t * @fires execute\n\t * @param {Object} [options] The command options.\n\t * @param {String} [options.text=''] The text to be inserted.\n\t * @param {module:engine/model/range~Range} [options.range] The range in which the text is inserted. Defaults\n\t * to the first range in the current selection.\n\t * @param {module:engine/model/range~Range} [options.resultRange] The range where the selection\n\t * should be placed after the insertion. If not specified, the selection will be placed right after\n\t * the inserted text.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst text = options.text || '';\n\t\tconst textInsertions = text.length;\n\t\tconst range = options.range || doc.selection.getFirstRange();\n\t\tconst resultRange = options.resultRange;\n\n\t\tmodel.enqueueChange( this._buffer.batch, writer => {\n\t\t\tconst isCollapsedRange = range.isCollapsed;\n\n\t\t\tthis._buffer.lock();\n\n\t\t\tmodel.deleteContent( model.createSelection( range ) );\n\n\t\t\tif ( text ) {\n\t\t\t\tmodel.insertContent( writer.createText( text, doc.selection.getAttributes() ), range.start );\n\t\t\t}\n\n\t\t\tif ( resultRange ) {\n\t\t\t\twriter.setSelection( resultRange );\n\t\t\t} else if ( isCollapsedRange ) {\n\t\t\t\t// If range was collapsed just shift the selection by the number of inserted characters.\n\t\t\t\twriter.setSelection( range.start.getShiftedBy( textInsertions ) );\n\t\t\t}\n\n\t\t\tthis._buffer.unlock();\n\n\t\t\tthis._buffer.input( textInsertions );\n\n\t\t\t// Store the batch as an 'input' batch for the Input.isInput( batch ) check.\n\t\t\tthis._batches.add( this._buffer.batch );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/utils\n */\n\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport diffToChanges from '@ckeditor/ckeditor5-utils/src/difftochanges';\n\n/**\n * Returns true if container children have mutated or more than a single text node was changed.\n *\n * @private\n * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n * @returns {Boolean}\n */\nexport function containerChildrenMutated( mutations ) {\n\tif ( mutations.length == 0 ) {\n\t\treturn false;\n\t}\n\n\t// Check if there is any mutation of `children` type or any mutation that changes more than one text node.\n\tfor ( const mutation of mutations ) {\n\t\tif ( mutation.type === 'children' && !getSingleTextNodeChange( mutation ) ) {\n\t\t\treturn true;\n\t\t}\n\t}\n\n\treturn false;\n}\n\n/**\n * Returns change made to a single text node.\n *\n * @private\n * @param {module:engine/view/observer/mutationobserver~MutatedText|\n * module:engine/view/observer/mutationobserver~MutatedChildren} mutation\n * @returns {Object|undefined} Change object (see {@link module:utils/difftochanges~diffToChanges} output)\n * or undefined if more than a single text node was changed.\n */\nexport function getSingleTextNodeChange( mutation ) {\n\t// One new node.\n\tif ( mutation.newChildren.length - mutation.oldChildren.length != 1 ) {\n\t\treturn;\n\t}\n\n\t// Which is text.\n\tconst diffResult = diff( mutation.oldChildren, mutation.newChildren, compareChildNodes );\n\tconst changes = diffToChanges( diffResult, mutation.newChildren );\n\n\t// In case of [ delete, insert, insert ] the previous check will not exit.\n\tif ( changes.length > 1 ) {\n\t\treturn;\n\t}\n\n\tconst change = changes[ 0 ];\n\n\t// Which is text.\n\tif ( !( !!change.values[ 0 ] && change.values[ 0 ].is( 'text' ) ) ) {\n\t\treturn;\n\t}\n\n\treturn change;\n}\n\n/**\n * Checks whether two view nodes are identical, which means they are the same object\n * or contain exactly same data (in case of text nodes).\n *\n * @private\n * @param {module:engine/view/node~Node} oldChild\n * @param {module:engine/view/node~Node} newChild\n * @returns {Boolean}\n */\nexport function compareChildNodes( oldChild, newChild ) {\n\tif ( !!oldChild && oldChild.is( 'text' ) && !!newChild && newChild.is( 'text' ) ) {\n\t\treturn oldChild.data === newChild.data;\n\t} else {\n\t\treturn oldChild === newChild;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/difftochanges\n */\n\n/**\n * Creates a set of changes which need to be applied to the input in order to transform\n * it into the output. This function can be used with strings or arrays.\n *\n *\t\tconst input = Array.from( 'abc' );\n *\t\tconst output = Array.from( 'xaby' );\n *\t\tconst changes = diffToChanges( diff( input, output ), output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput.splice( change.index, 0, ...change.values );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput.splice( change.index, change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\tinput.join( '' ) == output.join( '' ); // -> true\n *\n * @param {Array.<'equal'|'insert'|'delete'>} diff Result of {@link module:utils/diff~diff}.\n * @param {String|Array} output The string or array which was passed as diff's output.\n * @returns {Array.<Object>} Set of changes (insert or delete) which need to be applied to the input\n * in order to transform it into the output.\n */\nexport default function diffToChanges( diff, output ) {\n\tconst changes = [];\n\tlet index = 0;\n\tlet lastOperation;\n\n\tdiff.forEach( change => {\n\t\tif ( change == 'equal' ) {\n\t\t\tpushLast();\n\n\t\t\tindex++;\n\t\t} else if ( change == 'insert' ) {\n\t\t\tif ( isContinuationOf( 'insert' ) ) {\n\t\t\t\tlastOperation.values.push( output[ index ] );\n\t\t\t} else {\n\t\t\t\tpushLast();\n\n\t\t\t\tlastOperation = {\n\t\t\t\t\ttype: 'insert',\n\t\t\t\t\tindex,\n\t\t\t\t\tvalues: [ output[ index ] ]\n\t\t\t\t};\n\t\t\t}\n\n\t\t\tindex++;\n\t\t} else /* if ( change == 'delete' ) */ {\n\t\t\tif ( isContinuationOf( 'delete' ) ) {\n\t\t\t\tlastOperation.howMany++;\n\t\t\t} else {\n\t\t\t\tpushLast();\n\n\t\t\t\tlastOperation = {\n\t\t\t\t\ttype: 'delete',\n\t\t\t\t\tindex,\n\t\t\t\t\thowMany: 1\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\t} );\n\n\tpushLast();\n\n\treturn changes;\n\n\tfunction pushLast() {\n\t\tif ( lastOperation ) {\n\t\t\tchanges.push( lastOperation );\n\t\t\tlastOperation = null;\n\t\t}\n\t}\n\n\tfunction isContinuationOf( expected ) {\n\t\treturn lastOperation && lastOperation.type == expected;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/injecttypingmutationshandling\n */\n\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport DomConverter from '@ckeditor/ckeditor5-engine/src/view/domconverter';\n\nimport { getSingleTextNodeChange, containerChildrenMutated } from './utils';\n\n/**\n * Handles mutations caused by normal typing.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport default function injectTypingMutationsHandling( editor ) {\n\teditor.editing.view.document.on( 'mutations', ( evt, mutations, viewSelection ) => {\n\t\tnew MutationHandler( editor ).handle( mutations, viewSelection );\n\t} );\n}\n\n/**\n * Helper class for translating DOM mutations into model changes.\n *\n * @private\n */\nclass MutationHandler {\n\t/**\n\t * Creates an instance of the mutation handler.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * Editor instance for which mutations are handled.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * The editing controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/editingcontroller~EditingController} #editing\n\t\t */\n\t\tthis.editing = this.editor.editing;\n\t}\n\n\t/**\n\t * Handles given mutations.\n\t *\n\t * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n\t * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n\t * @param {module:engine/view/selection~Selection|null} viewSelection\n\t */\n\thandle( mutations, viewSelection ) {\n\t\tif ( containerChildrenMutated( mutations ) ) {\n\t\t\tthis._handleContainerChildrenMutations( mutations, viewSelection );\n\t\t} else {\n\t\t\tfor ( const mutation of mutations ) {\n\t\t\t\t// Fortunately it will never be both.\n\t\t\t\tthis._handleTextMutation( mutation, viewSelection );\n\t\t\t\tthis._handleTextNodeInsertion( mutation );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Handles situations when container's children mutated during input. This can happen when\n\t * the browser is trying to \"fix\" DOM in certain situations. For example, when the user starts to type\n\t * in `<p><a href=\"\"><i>Link{}</i></a></p>`, the browser might change the order of elements\n\t * to `<p><i><a href=\"\">Link</a>x{}</i></p>`. A similar situation happens when the spell checker\n\t * replaces a word wrapped with `<strong>` with a word wrapped with a `<b>` element.\n\t *\n\t * To handle such situations, the common DOM ancestor of all mutations is converted to the model representation\n\t * and then compared with the current model to calculate the proper text change.\n\t *\n\t * Note: Single text node insertion is handled in {@link #_handleTextNodeInsertion} and text node mutation is handled\n\t * in {@link #_handleTextMutation}).\n\t *\n\t * @private\n\t * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n\t * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n\t * @param {module:engine/view/selection~Selection|null} viewSelection\n\t */\n\t_handleContainerChildrenMutations( mutations, viewSelection ) {\n\t\t// Get common ancestor of all mutations.\n\t\tconst mutationsCommonAncestor = getMutationsContainer( mutations );\n\n\t\t// Quit if there is no common ancestor.\n\t\tif ( !mutationsCommonAncestor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.editor.editing.view.domConverter;\n\n\t\t// Get common ancestor in DOM.\n\t\tconst domMutationCommonAncestor = domConverter.mapViewToDom( mutationsCommonAncestor );\n\n\t\t// Create fresh DomConverter so it will not use existing mapping and convert current DOM to model.\n\t\t// This wouldn't be needed if DomConverter would allow to create fresh view without checking any mappings.\n\t\tconst freshDomConverter = new DomConverter();\n\t\tconst modelFromCurrentDom = this.editor.data.toModel(\n\t\t\tfreshDomConverter.domToView( domMutationCommonAncestor )\n\t\t).getChild( 0 );\n\n\t\t// Current model.\n\t\tconst currentModel = this.editor.editing.mapper.toModelElement( mutationsCommonAncestor );\n\n\t\t// If common ancestor is not mapped, do not do anything. It probably is a parent of another view element.\n\t\t// That means that we would need to diff model elements (see `if` below). Better return early instead of\n\t\t// trying to get a reasonable model ancestor. It will fell into the `if` below anyway.\n\t\t// This situation happens for example for lists. If `<ul>` is a common ancestor, `currentModel` is `undefined`\n\t\t// because `<ul>` is not mapped (`<li>`s are).\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/718.\n\t\tif ( !currentModel ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Get children from both ancestors.\n\t\tconst modelFromDomChildren = Array.from( modelFromCurrentDom.getChildren() );\n\t\tconst currentModelChildren = Array.from( currentModel.getChildren() );\n\n\t\t// Remove the last `<softBreak>` from the end of `modelFromDomChildren` if there is no `<softBreak>` in current model.\n\t\t// If the described scenario happened, it means that this is a bogus `<br />` added by a browser.\n\t\tconst lastDomChild = modelFromDomChildren[ modelFromDomChildren.length - 1 ];\n\t\tconst lastCurrentChild = currentModelChildren[ currentModelChildren.length - 1 ];\n\n\t\tif ( lastDomChild && lastDomChild.is( 'softBreak' ) && lastCurrentChild && !lastCurrentChild.is( 'softBreak' ) ) {\n\t\t\tmodelFromDomChildren.pop();\n\t\t}\n\n\t\tconst schema = this.editor.model.schema;\n\n\t\t// Skip situations when common ancestor has any container elements.\n\t\tif ( !isSafeForTextMutation( modelFromDomChildren, schema ) || !isSafeForTextMutation( currentModelChildren, schema ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Replace   inserted by the browser with normal space. See comment in `_handleTextMutation`.\n\t\t// Replace non-texts with any character. This is potentially dangerous but passes in manual tests. The thing is\n\t\t// that we need to take care of proper indexes so we cannot simply remove non-text elements from the content.\n\t\t// By inserting a character we keep all the real texts on their indexes.\n\t\tconst newText = modelFromDomChildren.map( item => item.is( 'text' ) ? item.data : '@' ).join( '' ).replace( /\\u00A0/g, ' ' );\n\t\tconst oldText = currentModelChildren.map( item => item.is( 'text' ) ? item.data : '@' ).join( '' ).replace( /\\u00A0/g, ' ' );\n\n\t\t// Do nothing if mutations created same text.\n\t\tif ( oldText === newText ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst diffResult = diff( oldText, newText );\n\n\t\tconst { firstChangeAt, insertions, deletions } = calculateChanges( diffResult );\n\n\t\t// Try setting new model selection according to passed view selection.\n\t\tlet modelSelectionRange = null;\n\n\t\tif ( viewSelection ) {\n\t\t\tmodelSelectionRange = this.editing.mapper.toModelRange( viewSelection.getFirstRange() );\n\t\t}\n\n\t\tconst insertText = newText.substr( firstChangeAt, insertions );\n\t\tconst removeRange = this.editor.model.createRange(\n\t\t\tthis.editor.model.createPositionAt( currentModel, firstChangeAt ),\n\t\t\tthis.editor.model.createPositionAt( currentModel, firstChangeAt + deletions )\n\t\t);\n\n\t\tthis.editor.execute( 'input', {\n\t\t\ttext: insertText,\n\t\t\trange: removeRange,\n\t\t\tresultRange: modelSelectionRange\n\t\t} );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_handleTextMutation( mutation, viewSelection ) {\n\t\tif ( mutation.type != 'text' ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Replace   inserted by the browser with normal space.\n\t\t// We want only normal spaces in the model and in the view. Renderer and DOM Converter will be then responsible\n\t\t// for rendering consecutive spaces using  , but the model and the view has to be clear.\n\t\t// Other feature may introduce inserting non-breakable space on specific key stroke (for example shift + space).\n\t\t// However then it will be handled outside of mutations, like enter key is.\n\t\t// The replacing is here because it has to be done before `diff` and `diffToChanges` functions, as they\n\t\t// take `newText` and compare it to (cleaned up) view.\n\t\t// It could also be done in mutation observer too, however if any outside plugin would like to\n\t\t// introduce additional events for mutations, they would get already cleaned up version (this may be good or not).\n\t\tconst newText = mutation.newText.replace( /\\u00A0/g, ' ' );\n\t\t// To have correct `diffResult`, we also compare view node text data with   replaced by space.\n\t\tconst oldText = mutation.oldText.replace( /\\u00A0/g, ' ' );\n\n\t\t// Do nothing if mutations created same text.\n\t\tif ( oldText === newText ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst diffResult = diff( oldText, newText );\n\n\t\tconst { firstChangeAt, insertions, deletions } = calculateChanges( diffResult );\n\n\t\t// Try setting new model selection according to passed view selection.\n\t\tlet modelSelectionRange = null;\n\n\t\tif ( viewSelection ) {\n\t\t\tmodelSelectionRange = this.editing.mapper.toModelRange( viewSelection.getFirstRange() );\n\t\t}\n\n\t\t// Get the position in view and model where the changes will happen.\n\t\tconst viewPos = this.editing.view.createPositionAt( mutation.node, firstChangeAt );\n\t\tconst modelPos = this.editing.mapper.toModelPosition( viewPos );\n\t\tconst removeRange = this.editor.model.createRange( modelPos, modelPos.getShiftedBy( deletions ) );\n\t\tconst insertText = newText.substr( firstChangeAt, insertions );\n\n\t\tthis.editor.execute( 'input', {\n\t\t\ttext: insertText,\n\t\t\trange: removeRange,\n\t\t\tresultRange: modelSelectionRange\n\t\t} );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_handleTextNodeInsertion( mutation ) {\n\t\tif ( mutation.type != 'children' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst change = getSingleTextNodeChange( mutation );\n\t\tconst viewPos = this.editing.view.createPositionAt( mutation.node, change.index );\n\t\tconst modelPos = this.editing.mapper.toModelPosition( viewPos );\n\t\tconst insertedText = change.values[ 0 ].data;\n\n\t\tthis.editor.execute( 'input', {\n\t\t\t// Replace   inserted by the browser with normal space.\n\t\t\t// See comment in `_handleTextMutation`.\n\t\t\t// In this case we don't need to do this before `diff` because we diff whole nodes.\n\t\t\t// Just change   in case there are some.\n\t\t\ttext: insertedText.replace( /\\u00A0/g, ' ' ),\n\t\t\trange: this.editor.model.createRange( modelPos )\n\t\t} );\n\t}\n}\n\n// Returns first common ancestor of all mutations that is either {@link module:engine/view/containerelement~ContainerElement}\n// or {@link module:engine/view/rootelement~RootElement}.\n//\n// @private\n// @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n// module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n// @returns {module:engine/view/containerelement~ContainerElement|engine/view/rootelement~RootElement|undefined}\nfunction getMutationsContainer( mutations ) {\n\tconst lca = mutations\n\t\t.map( mutation => mutation.node )\n\t\t.reduce( ( commonAncestor, node ) => {\n\t\t\treturn commonAncestor.getCommonAncestor( node, { includeSelf: true } );\n\t\t} );\n\n\tif ( !lca ) {\n\t\treturn;\n\t}\n\n\t// We need to look for container and root elements only, so check all LCA's\n\t// ancestors (starting from itself).\n\treturn lca.getAncestors( { includeSelf: true, parentFirst: true } )\n\t\t.find( element => element.is( 'containerElement' ) || element.is( 'rootElement' ) );\n}\n\n// Returns true if provided array contains content that won't be problematic during diffing and text mutation handling.\n//\n// @param {Array.<module:engine/model/node~Node>} children\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction isSafeForTextMutation( children, schema ) {\n\treturn children.every( child => schema.isInline( child ) );\n}\n\n// Calculates first change index and number of characters that should be inserted and deleted starting from that index.\n//\n// @private\n// @param diffResult\n// @returns {{insertions: number, deletions: number, firstChangeAt: *}}\nfunction calculateChanges( diffResult ) {\n\t// Index where the first change happens. Used to set the position from which nodes will be removed and where will be inserted.\n\tlet firstChangeAt = null;\n\t// Index where the last change happens. Used to properly count how many characters have to be removed and inserted.\n\tlet lastChangeAt = null;\n\n\t// Get `firstChangeAt` and `lastChangeAt`.\n\tfor ( let i = 0; i < diffResult.length; i++ ) {\n\t\tconst change = diffResult[ i ];\n\n\t\tif ( change != 'equal' ) {\n\t\t\tfirstChangeAt = firstChangeAt === null ? i : firstChangeAt;\n\t\t\tlastChangeAt = i;\n\t\t}\n\t}\n\n\t// How many characters, starting from `firstChangeAt`, should be removed.\n\tlet deletions = 0;\n\t// How many characters, starting from `firstChangeAt`, should be inserted.\n\tlet insertions = 0;\n\n\tfor ( let i = firstChangeAt; i <= lastChangeAt; i++ ) {\n\t\t// If there is no change (equal) or delete, the character is existing in `oldText`. We count it for removing.\n\t\tif ( diffResult[ i ] != 'insert' ) {\n\t\t\tdeletions++;\n\t\t}\n\n\t\t// If there is no change (equal) or insert, the character is existing in `newText`. We count it for inserting.\n\t\tif ( diffResult[ i ] != 'delete' ) {\n\t\t\tinsertions++;\n\t\t}\n\t}\n\n\treturn { insertions, deletions, firstChangeAt };\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/input\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport InputCommand from './inputcommand';\n\nimport injectUnsafeKeystrokesHandling from './utils/injectunsafekeystrokeshandling';\nimport injectTypingMutationsHandling from './utils/injecttypingmutationshandling';\n\n/**\n * Handles text input coming from the keyboard or other input methods.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Input extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Input';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// TODO The above default configuration value should be defined using editor.config.define() once it's fixed.\n\t\tconst inputCommand = new InputCommand( editor, editor.config.get( 'typing.undoStep' ) || 20 );\n\n\t\teditor.commands.add( 'input', inputCommand );\n\n\t\tinjectUnsafeKeystrokesHandling( editor );\n\t\tinjectTypingMutationsHandling( editor );\n\t}\n\n\t/**\n\t * Checks batch if it is a result of user input - e.g. typing.\n\t *\n\t *\t\tconst input = editor.plugins.get( 'Input' );\n\t *\n\t *\t\teditor.model.document.on( 'change:data', ( evt, batch ) => {\n\t *\t\t\tif ( input.isTyping( batch ) ) {\n\t *\t\t\t\tconsole.log( 'The user typed something...' );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** This method checks if the batch was created using {@link module:typing/inputcommand~InputCommand 'input'}\n\t * command as typing changes coming from user input are inserted to the document using that command.\n\t *\n\t * @param {module:engine/model/batch~Batch} batch A batch to check.\n\t * @returns {Boolean}\n\t */\n\tisInput( batch ) {\n\t\tconst inputCommand = this.editor.commands.get( 'input' );\n\n\t\treturn inputCommand._batches.has( batch );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/deletecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport count from '@ckeditor/ckeditor5-utils/src/count';\n\nimport ChangeBuffer from './utils/changebuffer';\n\n/**\n * The delete command. Used by the {@link module:typing/delete~Delete delete feature} to handle the <kbd>Delete</kbd> and\n * <kbd>Backspace</kbd> keys.\n *\n * @extends module:core/command~Command\n */\nexport default class DeleteCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {'forward'|'backward'} direction The directionality of the delete describing in what direction it\n\t * should consume the content when the selection is collapsed.\n\t */\n\tconstructor( editor, direction ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The directionality of the delete describing in what direction it should\n\t\t * consume the content when the selection is collapsed.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'forward'|'backward'} #direction\n\t\t */\n\t\tthis.direction = direction;\n\n\t\t/**\n\t\t * Delete's change buffer used to group subsequent changes into batches.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {typing.ChangeBuffer} #buffer\n\t\t */\n\t\tthis._buffer = new ChangeBuffer( editor.model, editor.config.get( 'typing.undoStep' ) );\n\t}\n\n\t/**\n\t * The current change buffer.\n\t *\n\t * @type {module:typing/utils/changebuffer~ChangeBuffer}\n\t */\n\tget buffer() {\n\t\treturn this._buffer;\n\t}\n\n\t/**\n\t * Executes the delete command. Depending on whether the selection is collapsed or not, deletes its content\n\t * or a piece of content in the {@link #direction defined direction}.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] The command options.\n\t * @param {'character'} [options.unit='character'] See {@link module:engine/model/utils/modifyselection~modifySelection}'s options.\n\t * @param {Number} [options.sequence=1] A number describing which subsequent delete event it is without the key being released.\n\t * See the {@link module:engine/view/document~Document#event:delete} event data.\n\t * @param {module:engine/model/selection~Selection} [options.selection] Selection to remove. If not set, current model selection\n\t * will be used.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.enqueueChange( this._buffer.batch, writer => {\n\t\t\tthis._buffer.lock();\n\n\t\t\tconst selection = writer.createSelection( options.selection || doc.selection );\n\n\t\t\t// Do not replace the whole selected content if selection was collapsed.\n\t\t\t// This prevents such situation:\n\t\t\t//\n\t\t\t// <h1></h1><p>[]</p>\t--> <h1>[</h1><p>]</p> \t\t--> <p></p>\n\t\t\t// starting content\t\t--> after `modifySelection`\t--> after `deleteContent`.\n\t\t\tconst doNotResetEntireContent = selection.isCollapsed;\n\n\t\t\t// Try to extend the selection in the specified direction.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tmodel.modifySelection( selection, { direction: this.direction, unit: options.unit } );\n\t\t\t}\n\n\t\t\t// Check if deleting in an empty editor. See #61.\n\t\t\tif ( this._shouldEntireContentBeReplacedWithParagraph( options.sequence || 1 ) ) {\n\t\t\t\tthis._replaceEntireContentWithParagraph( writer );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If selection is still collapsed, then there's nothing to delete.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tlet changeCount = 0;\n\n\t\t\tselection.getFirstRange().getMinimalFlatRanges().forEach( range => {\n\t\t\t\tchangeCount += count(\n\t\t\t\t\trange.getWalker( { singleCharacters: true, ignoreElementEnd: true, shallow: true } )\n\t\t\t\t);\n\t\t\t} );\n\n\t\t\tmodel.deleteContent( selection, { doNotResetEntireContent } );\n\t\t\tthis._buffer.input( changeCount );\n\n\t\t\twriter.setSelection( selection );\n\n\t\t\tthis._buffer.unlock();\n\t\t} );\n\t}\n\n\t/**\n\t * If the user keeps <kbd>Backspace</kbd> or <kbd>Delete</kbd> key pressed, the content of the current\n\t * editable will be cleared. However, this will not yet lead to resetting the remaining block to a paragraph\n\t * (which happens e.g. when the user does <kbd>Ctrl</kbd> + <kbd>A</kbd>, <kbd>Backspace</kbd>).\n\t *\n\t * But, if the user pressed the key in an empty editable for the first time,\n\t * we want to replace the entire content with a paragraph if:\n\t *\n\t * * the current limit element is empty,\n\t * * the paragraph is allowed in the limit element,\n\t * * the limit doesn't already have a paragraph inside.\n\t *\n\t * See https://github.com/ckeditor/ckeditor5-typing/issues/61.\n\t *\n\t * @private\n\t * @param {Number} sequence A number describing which subsequent delete event it is without the key being released.\n\t * @returns {Boolean}\n\t */\n\t_shouldEntireContentBeReplacedWithParagraph( sequence ) {\n\t\t// Does nothing if user pressed and held the \"Backspace\" or \"Delete\" key.\n\t\tif ( sequence > 1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst limitElement = model.schema.getLimitElement( selection );\n\n\t\t// If a collapsed selection contains the whole content it means that the content is empty\n\t\t// (from the user perspective).\n\t\tconst limitElementIsEmpty = selection.isCollapsed && selection.containsEntireContent( limitElement );\n\n\t\tif ( !limitElementIsEmpty ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !model.schema.checkChild( limitElement, 'paragraph' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst limitElementFirstChild = limitElement.getChild( 0 );\n\n\t\t// Does nothing if the limit element already contains only a paragraph.\n\t\t// We ignore the case when paragraph might have some inline elements (<p><inlineWidget>[]</inlineWidget></p>)\n\t\t// because we don't support such cases yet and it's unclear whether inlineWidget shouldn't be a limit itself.\n\t\tif ( limitElementFirstChild && limitElementFirstChild.name === 'paragraph' ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * The entire content is replaced with the paragraph. Selection is moved inside the paragraph.\n\t *\n\t * @private\n\t */\n\t_replaceEntireContentWithParagraph( writer ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst limitElement = model.schema.getLimitElement( selection );\n\t\tconst paragraph = writer.createElement( 'paragraph' );\n\n\t\twriter.remove( writer.createRangeIn( limitElement ) );\n\t\twriter.insert( paragraph, limitElement );\n\n\t\twriter.setSelection( paragraph, 0 );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/deleteobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\nimport DomEventData from '@ckeditor/ckeditor5-engine/src/view/observer/domeventdata';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Delete observer introduces the {@link module:engine/view/document~Document#event:delete} event.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DeleteObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst document = view.document;\n\t\tlet sequence = 0;\n\n\t\tdocument.on( 'keyup', ( evt, data ) => {\n\t\t\tif ( data.keyCode == keyCodes.delete || data.keyCode == keyCodes.backspace ) {\n\t\t\t\tsequence = 0;\n\t\t\t}\n\t\t} );\n\n\t\tdocument.on( 'keydown', ( evt, data ) => {\n\t\t\tconst deleteData = {};\n\n\t\t\tif ( data.keyCode == keyCodes.delete ) {\n\t\t\t\tdeleteData.direction = 'forward';\n\t\t\t\tdeleteData.unit = 'character';\n\t\t\t} else if ( data.keyCode == keyCodes.backspace ) {\n\t\t\t\tdeleteData.direction = 'backward';\n\t\t\t\tdeleteData.unit = 'codePoint';\n\t\t\t} else {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst hasWordModifier = env.isMac ? data.altKey : data.ctrlKey;\n\t\t\tdeleteData.unit = hasWordModifier ? 'word' : deleteData.unit;\n\t\t\tdeleteData.sequence = ++sequence;\n\n\t\t\tfireViewDeleteEvent( evt, data.domEvent, deleteData );\n\t\t} );\n\n\t\t// `beforeinput` is handled only for Android devices. Desktop Chrome and iOS are skipped because they are working fine now.\n\t\tif ( env.isAndroid ) {\n\t\t\tdocument.on( 'beforeinput', ( evt, data ) => {\n\t\t\t\t// If event type is other than `deleteContentBackward` then this is not deleting.\n\t\t\t\tif ( data.domEvent.inputType != 'deleteContentBackward' ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst deleteData = {\n\t\t\t\t\tunit: 'codepoint',\n\t\t\t\t\tdirection: 'backward',\n\t\t\t\t\tsequence: 1\n\t\t\t\t};\n\n\t\t\t\t// Android IMEs may change the DOM selection on `beforeinput` event so that the selection contains all the text\n\t\t\t\t// that the IME wants to remove. We will pass this information to `delete` event so proper part of the content is removed.\n\t\t\t\t//\n\t\t\t\t// Sometimes it is only expanding by a one character (in case of collapsed selection). In this case we don't need to\n\t\t\t\t// set a different selection to remove, it will work just fine.\n\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\tif ( domSelection.anchorNode == domSelection.focusNode && domSelection.anchorOffset + 1 != domSelection.focusOffset ) {\n\t\t\t\t\tdeleteData.selectionToRemove = view.domConverter.domSelectionToView( domSelection );\n\t\t\t\t}\n\n\t\t\t\tfireViewDeleteEvent( evt, data.domEvent, deleteData );\n\t\t\t} );\n\t\t}\n\n\t\tfunction fireViewDeleteEvent( originalEvent, domEvent, deleteData ) {\n\t\t\t// Save the event object to check later if it was stopped or not.\n\t\t\tlet event;\n\t\t\tdocument.once( 'delete', evt => ( event = evt ), { priority: Number.POSITIVE_INFINITY } );\n\n\t\t\tdocument.fire( 'delete', new DomEventData( document, domEvent, deleteData ) );\n\n\t\t\t// Stop the original event if `delete` event was stopped.\n\t\t\t// https://github.com/ckeditor/ckeditor5/issues/753\n\t\t\tif ( event && event.stop.called ) {\n\t\t\t\toriginalEvent.stop();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {}\n}\n\n/**\n * Event fired when the user tries to delete content (e.g. presses <kbd>Delete</kbd> or <kbd>Backspace</kbd>).\n *\n * Note: This event is fired by the {@link module:typing/deleteobserver~DeleteObserver observer}\n * (usually registered by the {@link module:typing/delete~Delete delete feature}).\n *\n * @event module:engine/view/document~Document#event:delete\n * @param {module:engine/view/observer/domeventdata~DomEventData} data\n * @param {'forward'|'delete'} data.direction The direction in which the deletion should happen.\n * @param {'character'|'word'} data.unit The \"amount\" of content that should be deleted.\n * @param {Number} data.sequence A number describing which subsequent delete event it is without the key being released.\n * If it's 2 or more it means that the key was pressed and hold.\n * @param {module:engine/view/selection~Selection} [data.selectionToRemove] View selection which content should be removed. If not set,\n * current selection should be used.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/delete\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport DeleteCommand from './deletecommand';\nimport DeleteObserver from './deleteobserver';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * The delete and backspace feature. Handles the <kbd>Delete</kbd> and <kbd>Backspace</kbd> keys in the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Delete extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Delete';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\tview.addObserver( DeleteObserver );\n\n\t\teditor.commands.add( 'forwardDelete', new DeleteCommand( editor, 'forward' ) );\n\t\teditor.commands.add( 'delete', new DeleteCommand( editor, 'backward' ) );\n\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\tconst deleteCommandParams = { unit: data.unit, sequence: data.sequence };\n\n\t\t\t// If a specific (view) selection to remove was set, convert it to a model selection and set as a parameter for `DeleteCommand`.\n\t\t\tif ( data.selectionToRemove ) {\n\t\t\t\tconst modelSelection = editor.model.createSelection();\n\t\t\t\tconst ranges = [];\n\n\t\t\t\tfor ( const viewRange of data.selectionToRemove.getRanges() ) {\n\t\t\t\t\tranges.push( editor.editing.mapper.toModelRange( viewRange ) );\n\t\t\t\t}\n\n\t\t\t\tmodelSelection.setTo( ranges );\n\n\t\t\t\tdeleteCommandParams.selection = modelSelection;\n\t\t\t}\n\n\t\t\teditor.execute( data.direction == 'forward' ? 'forwardDelete' : 'delete', deleteCommandParams );\n\n\t\t\tdata.preventDefault();\n\n\t\t\tview.scrollToTheSelection();\n\t\t} );\n\n\t\t// Android IMEs have a quirk - they change DOM selection after the input changes were performed by the browser.\n\t\t// This happens on `keyup` event. Android doesn't know anything about our deletion and selection handling. Even if the selection\n\t\t// was changed during input events, IME remembers the position where the selection \"should\" be placed and moves it there.\n\t\t//\n\t\t// To prevent incorrect selection, we save the selection after deleting here and then re-set it on `keyup`. This has to be done\n\t\t// on DOM selection level, because on `keyup` the model selection is still the same as it was just after deletion, so it\n\t\t// wouldn't be changed and the fix would do nothing.\n\t\t//\n\t\tif ( env.isAndroid ) {\n\t\t\tlet domSelectionAfterDeletion = null;\n\n\t\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\tdomSelectionAfterDeletion = {\n\t\t\t\t\tanchorNode: domSelection.anchorNode,\n\t\t\t\t\tanchorOffset: domSelection.anchorOffset,\n\t\t\t\t\tfocusNode: domSelection.focusNode,\n\t\t\t\t\tfocusOffset: domSelection.focusOffset\n\t\t\t\t};\n\t\t\t}, { priority: 'lowest' } );\n\n\t\t\tthis.listenTo( viewDocument, 'keyup', ( evt, data ) => {\n\t\t\t\tif ( domSelectionAfterDeletion ) {\n\t\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\t\tdomSelection.collapse( domSelectionAfterDeletion.anchorNode, domSelectionAfterDeletion.anchorOffset );\n\t\t\t\t\tdomSelection.extend( domSelectionAfterDeletion.focusNode, domSelectionAfterDeletion.focusOffset );\n\n\t\t\t\t\tdomSelectionAfterDeletion = null;\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/typing\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Input from './input';\nimport Delete from './delete';\n\n/**\n * The typing feature. It handles typing.\n *\n * This is a \"glue\" plugin which loads the {@link module:typing/input~Input} and {@link module:typing/delete~Delete}\n * plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Typing extends Plugin {\n\tstatic get requires() {\n\t\treturn [ Input, Delete ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Typing';\n\t}\n}\n\n/**\n * The configuration of the typing features. Used by the features from the `@ckeditor/ckeditor5-typing` package.\n *\n * Read more in {@link module:typing/typing~TypingConfig}.\n *\n * @member {module:typing/typing~TypingConfig} module:core/editor/editorconfig~EditorConfig#typing\n */\n\n/**\n * The configuration of the typing features. Used by the typing features in `@ckeditor/ckeditor5-typing` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\ttyping: ... // Typing feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface TypingConfig\n */\n\n/**\n * The granularity of undo/redo for typing and deleting. The value `20` means (more or less) that a new undo step\n * is created every 20 characters are inserted or deleted.\n *\n * @member {Number} [module:typing/typing~TypingConfig#undoStep=20]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/nooperation\n */\n\nimport Operation from './operation';\n\n/**\n * Operation which is doing nothing (\"empty operation\", \"do-nothing operation\", \"noop\"). This is an operation,\n * which when executed does not change the tree model. It still has some parameters defined for transformation purposes.\n *\n * In most cases this operation is a result of transforming operations. When transformation returns\n * {@link module:engine/model/operation/nooperation~NoOperation} it means that changes done by the transformed operation\n * have already been applied.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class NoOperation extends Operation {\n\tget type() {\n\t\treturn 'noop';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/nooperation~NoOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new NoOperation( this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/nooperation~NoOperation}\n\t */\n\tgetReversed() {\n\t\treturn new NoOperation( this.baseVersion + 1 );\n\t}\n\n\t_execute() {\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'NoOperation';\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `NoOperation( ${ this.baseVersion } )`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport InsertOperation from './insertoperation';\nimport AttributeOperation from './attributeoperation';\nimport RenameOperation from './renameoperation';\nimport MarkerOperation from './markeroperation';\nimport MoveOperation from './moveoperation';\nimport RootAttributeOperation from './rootattributeoperation';\nimport MergeOperation from './mergeoperation';\nimport SplitOperation from './splitoperation';\nimport NoOperation from './nooperation';\nimport Range from '../range';\nimport Position from '../position';\n\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\nconst transformations = new Map();\n\n/**\n * @module engine/model/operation/transform\n */\n\n/**\n * Sets a transformation function to be be used to transform instances of class `OperationA` by instances of class `OperationB`.\n *\n * The `transformationFunction` is passed three parameters:\n *\n * * `a` - operation to be transformed, an instance of `OperationA`,\n * * `b` - operation to be transformed by, an instance of `OperationB`,\n * * {@link module:engine/model/operation/transform~TransformationContext `context`} - object with additional information about\n * transformation context.\n *\n * The `transformationFunction` should return transformation result, which is an array with one or multiple\n * {@link module:engine/model/operation/operation~Operation operation} instances.\n *\n * @protected\n * @param {Function} OperationA\n * @param {Function} OperationB\n * @param {Function} transformationFunction Function to use for transforming.\n */\nfunction setTransformation( OperationA, OperationB, transformationFunction ) {\n\tlet aGroup = transformations.get( OperationA );\n\n\tif ( !aGroup ) {\n\t\taGroup = new Map();\n\t\ttransformations.set( OperationA, aGroup );\n\t}\n\n\taGroup.set( OperationB, transformationFunction );\n}\n\n/**\n * Returns a previously set transformation function for transforming an instance of `OperationA` by an instance of `OperationB`.\n *\n * If no transformation was set for given pair of operations, {@link module:engine/model/operation/transform~noUpdateTransformation}\n * is returned. This means that if no transformation was set, the `OperationA` instance will not change when transformed\n * by the `OperationB` instance.\n *\n * @private\n * @param {Function} OperationA\n * @param {Function} OperationB\n * @returns {Function} Function set to transform an instance of `OperationA` by an instance of `OperationB`.\n */\nfunction getTransformation( OperationA, OperationB ) {\n\tconst aGroup = transformations.get( OperationA );\n\n\tif ( aGroup && aGroup.has( OperationB ) ) {\n\t\treturn aGroup.get( OperationB );\n\t}\n\n\treturn noUpdateTransformation;\n}\n\n/**\n * A transformation function that only clones operation to transform, without changing it.\n *\n * @private\n * @param {module:engine/model/operation/operation~Operation} a Operation to transform.\n * @returns {Array.<module:engine/model/operation/operation~Operation>}\n */\nfunction noUpdateTransformation( a ) {\n\treturn [ a ];\n}\n\n/**\n * Transforms operation `a` by operation `b`.\n *\n * @param {module:engine/model/operation/operation~Operation} a Operation to be transformed.\n * @param {module:engine/model/operation/operation~Operation} b Operation to transform by.\n * @param {module:engine/model/operation/transform~TransformationContext} context Transformation context for this transformation.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} Transformation result.\n */\nexport function transform( a, b, context = {} ) {\n\tconst transformationFunction = getTransformation( a.constructor, b.constructor );\n\n\ttry {\n\t\ta = a.clone();\n\n\t\treturn transformationFunction( a, b, context );\n\t} catch ( e ) {\n\t\t// @if CK_DEBUG // console.warn( 'Error during operation transformation!', e.message );\n\t\t// @if CK_DEBUG // console.warn( 'Transformed operation', a );\n\t\t// @if CK_DEBUG // console.warn( 'Operation transformed by', b );\n\t\t// @if CK_DEBUG // console.warn( 'context.aIsStrong', context.aIsStrong );\n\t\t// @if CK_DEBUG // console.warn( 'context.aWasUndone', context.aWasUndone );\n\t\t// @if CK_DEBUG // console.warn( 'context.bWasUndone', context.bWasUndone );\n\t\t// @if CK_DEBUG // console.warn( 'context.abRelation', context.abRelation );\n\t\t// @if CK_DEBUG // console.warn( 'context.baRelation', context.baRelation );\n\n\t\tthrow e;\n\t}\n}\n\n/**\n * Performs a transformation of two sets of operations - `operationsA` and `operationsB`. The transformation is two-way -\n * both transformed `operationsA` and transformed `operationsB` are returned.\n *\n * Note, that the first operation in each set should base on the same document state (\n * {@link module:engine/model/document~Document#version document version}).\n *\n * It is assumed that `operationsA` are \"more important\" during conflict resolution between two operations.\n *\n * New copies of both passed arrays and operations inside them are returned. Passed arguments are not altered.\n *\n * Base versions of the transformed operations sets are updated accordingly. For example, assume that base versions are `4`\n * and there are `3` operations in `operationsA` and `5` operations in `operationsB`. Then:\n *\n * * transformed `operationsA` will start from base version `9` (`4` base version + `5` operations B),\n * * transformed `operationsB` will start from base version `7` (`4` base version + `3` operations A).\n *\n * If no operation was broken into two during transformation, then both sets will end up with an operation that bases on version `11`:\n *\n * * transformed `operationsA` start from `9` and there are `3` of them, so the last will have `baseVersion` equal to `11`,\n * * transformed `operationsB` start from `7` and there are `5` of them, so the last will have `baseVersion` equal to `11`.\n *\n * @param {Array.<module:engine/model/operation/operation~Operation>} operationsA\n * @param {Array.<module:engine/model/operation/operation~Operation>} operationsB\n * @param {Object} options Additional transformation options.\n * @param {module:engine/model/document~Document|null} options.document Document which the operations change.\n * @param {Boolean} [options.useRelations=false] Whether during transformation relations should be used (used during undo for\n * better conflict resolution).\n * @param {Boolean} [options.padWithNoOps=false] Whether additional {@link module:engine/model/operation/nooperation~NoOperation}s\n * should be added to the transformation results to force the same last base version for both transformed sets (in case\n * if some operations got broken into multiple operations during transformation).\n * @returns {Object} Transformation result.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} return.operationsA Transformed `operationsA`.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} return.operationsB Transformed `operationsB`.\n * @returns {Map} return.originalOperations A map that links transformed operations to original operations. The keys are the transformed\n * operations and the values are the original operations from the input (`operationsA` and `operationsB`).\n */\nexport function transformSets( operationsA, operationsB, options ) {\n\t// Create new arrays so the originally passed arguments are not changed.\n\t// No need to clone operations, they are cloned as they are transformed.\n\toperationsA = operationsA.slice();\n\toperationsB = operationsB.slice();\n\n\tconst contextFactory = new ContextFactory( options.document, options.useRelations, options.forceWeakRemove );\n\tcontextFactory.setOriginalOperations( operationsA );\n\tcontextFactory.setOriginalOperations( operationsB );\n\n\tconst originalOperations = contextFactory.originalOperations;\n\n\t// If one of sets is empty there is simply nothing to transform, so return sets as they are.\n\tif ( operationsA.length == 0 || operationsB.length == 0 ) {\n\t\treturn { operationsA, operationsB, originalOperations };\n\t}\n\t//\n\t// Following is a description of transformation process:\n\t//\n\t// There are `operationsA` and `operationsB` to be transformed, both by both.\n\t//\n\t// So, suppose we have sets of two operations each: `operationsA` = `[ a1, a2 ]`, `operationsB` = `[ b1, b2 ]`.\n\t//\n\t// Remember, that we can only transform operations that base on the same context. We assert that `a1` and `b1` base on\n\t// the same context and we transform them. Then, we get `a1'` and `b1'`. `a2` bases on a context with `a1` -- `a2`\n\t// is an operation that followed `a1`. Similarly, `b2` bases on a context with `b1`.\n\t//\n\t// However, since `a1'` is a result of transformation by `b1`, `a1'` now also has a context with `b1`. This means that\n\t// we can safely transform `a1'` by `b2`. As we finish transforming `a1`, we also transformed all `operationsB`.\n\t// All `operationsB` also have context including `a1`. Now, we can properly transform `a2` by those operations.\n\t//\n\t// The transformation process can be visualized on a transformation diagram (\"diamond diagram\"):\n\t//\n\t// [the initial state]\n\t// [common for a1 and b1]\n\t//\n\t// *\n\t// / \\\n\t// / \\\n\t// b1 a1\n\t// / \\\n\t// / \\\n\t// * *\n\t// / \\ / \\\n\t// / \\ / \\\n\t// b2 a1' b1' a2\n\t// / \\ / \\\n\t// / \\ / \\\n\t// * * *\n\t// \\ / \\ /\n\t// \\ / \\ /\n\t// a1'' b2' a2' b1''\n\t// \\ / \\ /\n\t// \\ / \\ /\n\t// * *\n\t// \\ /\n\t// \\ /\n\t// a2'' b2''\n\t// \\ /\n\t// \\ /\n\t// *\n\t//\n\t// [the final state]\n\t//\n\t// The final state can be reached from the initial state by applying `a1`, `a2`, `b1''` and `b2''`, as well as by\n\t// applying `b1`, `b2`, `a1''`, `a2''`. Note how the operations get to a proper common state before each pair is\n\t// transformed.\n\t//\n\t// Another thing to consider is that an operation during transformation can be broken into multiple operations.\n\t// Suppose that `a1` * `b1` = `[ a11', a12' ]` (instead of `a1'` that we considered previously).\n\t//\n\t// In that case, we leave `a12'` for later and we continue transforming `a11'` until it is transformed by all `operationsB`\n\t// (in our case it is just `b2`). At this point, `b1` is transformed by \"whole\" `a1`, while `b2` is only transformed\n\t// by `a11'`. Similarly, `a12'` is only transformed by `b1`. This leads to a conclusion that we need to start transforming `a12'`\n\t// from the moment just after it was broken. So, `a12'` is transformed by `b2`. Now, \"the whole\" `a1` is transformed\n\t// by `operationsB`, while all `operationsB` are transformed by \"the whole\" `a1`. This means that we can continue with\n\t// following `operationsA` (in our case it is just `a2`).\n\t//\n\t// Of course, also `operationsB` can be broken. However, since we focus on transforming operation `a` to the end,\n\t// the only thing to do is to store both pieces of operation `b`, so that the next transformed operation `a` will\n\t// be transformed by both of them.\n\t//\n\t// *\n\t// / \\\n\t// / \\\n\t// / \\\n\t// b1 a1\n\t// / \\\n\t// / \\\n\t// / \\\n\t// * *\n\t// / \\ / \\\n\t// / a11' / \\\n\t// / \\ / \\\n\t// b2 * b1' a2\n\t// / / \\ / \\\n\t// / / a12' / \\\n\t// / / \\ / \\\n\t// * b2' * *\n\t// \\ / / \\ /\n\t// a11'' / b21'' \\ /\n\t// \\ / / \\ /\n\t// * * a2' b1''\n\t// \\ / \\ \\ /\n\t// a12'' b22''\\ \\ /\n\t// \\ / \\ \\ /\n\t// * a2'' *\n\t// \\ \\ /\n\t// \\ \\ b21'''\n\t// \\ \\ /\n\t// a2''' *\n\t// \\ /\n\t// \\ b22'''\n\t// \\ /\n\t// *\n\t//\n\t// Note, how `a1` is broken and transformed into `a11'` and `a12'`, while `b2'` got broken and transformed into `b21''` and `b22''`.\n\t//\n\t// Having all that on mind, here is an outline for the transformation process algorithm:\n\t//\n\t// 1. We have `operationsA` and `operationsB` array, which we dynamically update as the transformation process goes.\n\t//\n\t// 2. We take next (or first) operation from `operationsA` and check from which operation `b` we need to start transforming it.\n\t// All original `operationsA` are set to be transformed starting from the first operation `b`.\n\t//\n\t// 3. We take operations from `operationsB`, one by one, starting from the correct one, and transform operation `a`\n\t// by operation `b` (and vice versa). We update `operationsA` and `operationsB` by replacing the original operations\n\t// with the transformation results.\n\t//\n\t// 4. If operation is broken into multiple operations, we save all the new operations in the place of the\n\t// original operation.\n\t//\n\t// 5. Additionally, if operation `a` was broken, for the \"new\" operation, we remember from which operation `b` it should\n\t// be transformed by.\n\t//\n\t// 6. We continue transforming \"current\" operation `a` until it is transformed by all `operationsB`. Then, go to 2.\n\t// unless the last operation `a` was transformed.\n\t//\n\t// The actual implementation of the above algorithm is slightly different, as only one loop (while) is used.\n\t// The difference is that we have \"current\" `a` operation to transform and we store the index of the next `b` operation\n\t// to transform by. Each loop operates on two indexes then: index pointing to currently processed `a` operation and\n\t// index pointing to next `b` operation. Each loop is just one `a * b` + `b * a` transformation. After each loop\n\t// operation `b` index is updated. If all `b` operations were visited for the current `a` operation, we change\n\t// current `a` operation index to the next one.\n\t//\n\n\t// For each operation `a`, keeps information what is the index in `operationsB` from which the transformation should start.\n\tconst nextTransformIndex = new WeakMap();\n\n\t// For all the original `operationsA`, set that they should be transformed starting from the first of `operationsB`.\n\tfor ( const op of operationsA ) {\n\t\tnextTransformIndex.set( op, 0 );\n\t}\n\n\t// Additional data that is used for some postprocessing after the main transformation process is done.\n\tconst data = {\n\t\tnextBaseVersionA: operationsA[ operationsA.length - 1 ].baseVersion + 1,\n\t\tnextBaseVersionB: operationsB[ operationsB.length - 1 ].baseVersion + 1,\n\t\toriginalOperationsACount: operationsA.length,\n\t\toriginalOperationsBCount: operationsB.length\n\t};\n\n\t// Index of currently transformed operation `a`.\n\tlet i = 0;\n\n\t// While not all `operationsA` are transformed...\n\twhile ( i < operationsA.length ) {\n\t\t// Get \"current\" operation `a`.\n\t\tconst opA = operationsA[ i ];\n\n\t\t// For the \"current\" operation `a`, get the index of the next operation `b` to transform by.\n\t\tconst indexB = nextTransformIndex.get( opA );\n\n\t\t// If operation `a` was already transformed by every operation `b`, change \"current\" operation `a` to the next one.\n\t\tif ( indexB == operationsB.length ) {\n\t\t\ti++;\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst opB = operationsB[ indexB ];\n\n\t\t// Transform `a` by `b` and `b` by `a`.\n\t\tconst newOpsA = transform( opA, opB, contextFactory.getContext( opA, opB, true ) );\n\t\tconst newOpsB = transform( opB, opA, contextFactory.getContext( opB, opA, false ) );\n\t\t// As a result we get one or more `newOpsA` and one or more `newOpsB` operations.\n\n\t\t// Update contextual information about operations.\n\t\tcontextFactory.updateRelation( opA, opB );\n\n\t\tcontextFactory.setOriginalOperations( newOpsA, opA );\n\t\tcontextFactory.setOriginalOperations( newOpsB, opB );\n\n\t\t// For new `a` operations, update their index of the next operation `b` to transform them by.\n\t\t//\n\t\t// This is needed even if there was only one result (`a` was not broken) because that information is used\n\t\t// at the beginning of this loop every time.\n\t\tfor ( const newOpA of newOpsA ) {\n\t\t\t// Acknowledge, that operation `b` also might be broken into multiple operations.\n\t\t\t//\n\t\t\t// This is why we raise `indexB` not just by 1. If `newOpsB` are multiple operations, they will be\n\t\t\t// spliced in the place of `opB`. So we need to change `transformBy` accordingly, so that an operation won't\n\t\t\t// be transformed by the same operation (part of it) again.\n\t\t\tnextTransformIndex.set( newOpA, indexB + newOpsB.length );\n\t\t}\n\n\t\t// Update `operationsA` and `operationsB` with the transformed versions.\n\t\toperationsA.splice( i, 1, ...newOpsA );\n\t\toperationsB.splice( indexB, 1, ...newOpsB );\n\t}\n\n\tif ( options.padWithNoOps ) {\n\t\t// If no-operations padding is enabled, count how many extra `a` and `b` operations were generated.\n\t\tconst brokenOperationsACount = operationsA.length - data.originalOperationsACount;\n\t\tconst brokenOperationsBCount = operationsB.length - data.originalOperationsBCount;\n\n\t\t// Then, if that number is not the same, pad `operationsA` or `operationsB` with correct number of no-ops so\n\t\t// that the base versions are equalled.\n\t\t//\n\t\t// Note that only one array will be updated, as only one of those subtractions can be greater than zero.\n\t\tpadWithNoOps( operationsA, brokenOperationsBCount - brokenOperationsACount );\n\t\tpadWithNoOps( operationsB, brokenOperationsACount - brokenOperationsBCount );\n\t}\n\n\t// Finally, update base versions of transformed operations.\n\tupdateBaseVersions( operationsA, data.nextBaseVersionB );\n\tupdateBaseVersions( operationsB, data.nextBaseVersionA );\n\n\treturn { operationsA, operationsB, originalOperations };\n}\n\n// Gathers additional data about operations processed during transformation. Can be used to obtain contextual information\n// about two operations that are about to be transformed. This contextual information can be used for better conflict resolution.\nclass ContextFactory {\n\t// Creates `ContextFactory` instance.\n\t//\n\t// @param {module:engine/model/document~Document} document Document which the operations change.\n\t// @param {Boolean} useRelations Whether during transformation relations should be used (used during undo for\n\t// better conflict resolution).\n\t// @param {Boolean} [forceWeakRemove=false] If set to `false`, remove operation will be always stronger than move operation,\n\t// so the removed nodes won't end up back in the document root. When set to `true`, context data will be used.\n\tconstructor( document, useRelations, forceWeakRemove = false ) {\n\t\t// For each operation that is created during transformation process, we keep a reference to the original operation\n\t\t// which it comes from. The original operation works as a kind of \"identifier\". Every contextual information\n\t\t// gathered during transformation that we want to save for given operation, is actually saved for the original operation.\n\t\t// This way no matter if operation `a` is cloned, then transformed, even breaks, we still have access to the previously\n\t\t// gathered data through original operation reference.\n\t\tthis.originalOperations = new Map();\n\n\t\t// `model.History` instance which information about undone operations will be taken from.\n\t\tthis._history = document.history;\n\n\t\t// Whether additional context should be used.\n\t\tthis._useRelations = useRelations;\n\n\t\tthis._forceWeakRemove = !!forceWeakRemove;\n\n\t\t// Relations is a double-map structure (maps in map) where for two operations we store how those operations were related\n\t\t// to each other. Those relations are evaluated during transformation process. For every transformated pair of operations\n\t\t// we keep relations between them.\n\t\tthis._relations = new Map();\n\t}\n\n\t// Sets \"original operation\" for given operations.\n\t//\n\t// During transformation process, operations are cloned, then changed, then processed again, sometimes broken into two\n\t// or multiple operations. When gathering additional data it is important that all operations can be somehow linked\n\t// so a cloned and transformed \"version\" still kept track of the data assigned earlier to it.\n\t//\n\t// The original operation object will be used as such an universal linking id. Throughout the transformation process\n\t// all cloned operations will refer to \"the original operation\" when storing and reading additional data.\n\t//\n\t// If `takeFrom` is not set, each operation from `operations` array will be assigned itself as \"the original operation\".\n\t// This should be used as an initialization step.\n\t//\n\t// If `takeFrom` is set, each operation from `operations` will be assigned the same original operation as assigned\n\t// for `takeFrom` operation. This should be used to update original operations. It should be used in a way that\n\t// `operations` are the result of `takeFrom` transformation to ensure proper \"original operation propagation\".\n\t//\n\t// @param {Array.<module:engine/model/operation/operation~Operation>} operations\n\t// @param {module:engine/model/operation/operation~Operation|null} [takeFrom=null]\n\tsetOriginalOperations( operations, takeFrom = null ) {\n\t\tconst originalOperation = takeFrom ? this.originalOperations.get( takeFrom ) : null;\n\n\t\tfor ( const operation of operations ) {\n\t\t\tthis.originalOperations.set( operation, originalOperation || operation );\n\t\t}\n\t}\n\n\t// Saves a relation between operations `opA` and `opB`.\n\t//\n\t// Relations are then later used to help solve conflicts when operations are transformed.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\tupdateRelation( opA, opB ) {\n\t\t// The use of relations is described in a bigger detail in transformation functions.\n\t\t//\n\t\t// In brief, this function, for specified pairs of operation types, checks how positions defined in those operations relate.\n\t\t// Then those relations are saved. For example, for two move operations, it is saved if one of those operations target\n\t\t// position is before the other operation source position. This kind of information gives contextual information when\n\t\t// transformation is used during undo. Similar checks are done for other pairs of operations.\n\t\t//\n\t\tswitch ( opA.constructor ) {\n\t\t\tcase MoveOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( opA.targetPosition.isEqual( opB.sourcePosition ) || opB.movedRange.containsPosition( opA.targetPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertAtSource' );\n\t\t\t\t\t\t} else if ( opA.targetPosition.isEqual( opB.deletionPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertBetween' );\n\t\t\t\t\t\t} else if ( opA.targetPosition.isAfter( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'moveTargetAfter' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tif ( opA.targetPosition.isEqual( opB.sourcePosition ) || opA.targetPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertBefore' );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertAfter' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase SplitOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( opA.splitPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitBefore' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tif ( opA.splitPosition.isEqual( opB.sourcePosition ) || opA.splitPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitBefore' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase MergeOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( !opA.targetPosition.isEqual( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeTargetNotMoved' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.targetPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeSourceNotMoved' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeSameElement' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase SplitOperation: {\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.splitPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitAtSource' );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase MarkerOperation: {\n\t\t\t\tconst markerRange = opA.newRange;\n\n\t\t\t\tif ( !markerRange ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tconst movedRange = Range._createFromPositionAndShift( opB.sourcePosition, opB.howMany );\n\n\t\t\t\t\t\tconst affectedLeft = movedRange.containsPosition( markerRange.start ) ||\n\t\t\t\t\t\t\tmovedRange.start.isEqual( markerRange.start );\n\n\t\t\t\t\t\tconst affectedRight = movedRange.containsPosition( markerRange.end ) ||\n\t\t\t\t\t\t\tmovedRange.end.isEqual( markerRange.end );\n\n\t\t\t\t\t\tif ( ( affectedLeft || affectedRight ) && !movedRange.containsRange( markerRange ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, {\n\t\t\t\t\t\t\t\tside: affectedLeft ? 'left' : 'right',\n\t\t\t\t\t\t\t\tpath: affectedLeft ? markerRange.start.path.slice() : markerRange.end.path.slice()\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tconst wasInLeftElement = markerRange.start.isEqual( opB.targetPosition );\n\t\t\t\t\t\tconst wasStartBeforeMergedElement = markerRange.start.isEqual( opB.deletionPosition );\n\t\t\t\t\t\tconst wasEndBeforeMergedElement = markerRange.end.isEqual( opB.deletionPosition );\n\t\t\t\t\t\tconst wasInRightElement = markerRange.end.isEqual( opB.sourcePosition );\n\n\t\t\t\t\t\tif ( wasInLeftElement || wasStartBeforeMergedElement || wasEndBeforeMergedElement || wasInRightElement ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, {\n\t\t\t\t\t\t\t\twasInLeftElement,\n\t\t\t\t\t\t\t\twasStartBeforeMergedElement,\n\t\t\t\t\t\t\t\twasEndBeforeMergedElement,\n\t\t\t\t\t\t\t\twasInRightElement\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Evaluates and returns contextual information about two given operations `opA` and `opB` which are about to be transformed.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @returns {module:engine/model/operation/transform~TransformationContext}\n\tgetContext( opA, opB, aIsStrong ) {\n\t\treturn {\n\t\t\taIsStrong,\n\t\t\taWasUndone: this._wasUndone( opA ),\n\t\t\tbWasUndone: this._wasUndone( opB ),\n\t\t\tabRelation: this._useRelations ? this._getRelation( opA, opB ) : null,\n\t\t\tbaRelation: this._useRelations ? this._getRelation( opB, opA ) : null,\n\t\t\tforceWeakRemove: this._forceWeakRemove\n\t\t};\n\t}\n\n\t// Returns whether given operation `op` has already been undone.\n\t//\n\t// Information whether an operation was undone gives more context when making a decision when two operations are in conflict.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} op\n\t// @returns {Boolean}\n\t_wasUndone( op ) {\n\t\t// For `op`, get its original operation. After all, if `op` is a clone (or even transformed clone) of another\n\t\t// operation, literally `op` couldn't be undone. It was just generated. If anything, it was the operation it origins\n\t\t// from which was undone. So get that original operation.\n\t\tconst originalOp = this.originalOperations.get( op );\n\n\t\t// And check with the document if the original operation was undone.\n\t\treturn originalOp.wasUndone || this._history.isUndoneOperation( originalOp );\n\t}\n\n\t// Returns a relation between `opA` and an operation which is undone by `opB`. This can be `String` value if a relation\n\t// was set earlier or `null` if there was no relation between those operations.\n\t//\n\t// This is a little tricky to understand, so let's compare it to `ContextFactory#_wasUndone`.\n\t//\n\t// When `wasUndone( opB )` is used, we check if the `opB` has already been undone. It is obvious, that the\n\t// undoing operation must happen after the undone operation. So, essentially, we have `opB`, we take document history,\n\t// we look forward in the future and ask if in that future `opB` was undone.\n\t//\n\t// Relations is a backward process to `wasUndone()`.\n\t//\n\t// Long story short - using relations is asking what happened in the past. Looking back. This time we have an undoing\n\t// operation `opB` which has undone some other operation. When there is a transformation `opA` x `opB` and there is\n\t// a conflict to solve and `opB` is an undoing operation, we can look back in the history and see what was a relation\n\t// between `opA` and the operation which `opB` undone. Basing on that relation from the past, we can now make\n\t// a better decision when resolving a conflict between two operations, because we know more about the context of\n\t// those two operations.\n\t//\n\t// This is why this function does not return a relation directly between `opA` and `opB` because we need to look\n\t// back to search for a meaningful contextual information.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @returns {String|null}\n\t_getRelation( opA, opB ) {\n\t\t// Get the original operation. Similarly as in `wasUndone()` it is used as an universal identifier for stored data.\n\t\tconst origB = this.originalOperations.get( opB );\n\t\tconst undoneB = this._history.getUndoneOperation( origB );\n\n\t\t// If `opB` is not undoing any operation, there is no relation.\n\t\tif ( !undoneB ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst origA = this.originalOperations.get( opA );\n\t\tconst relationsA = this._relations.get( origA );\n\n\t\t// Get all relations for `opA`, and check if there is a relation with `opB`-undone-counterpart. If so, return it.\n\t\tif ( relationsA ) {\n\t\t\treturn relationsA.get( undoneB ) || null;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t// Helper function for `ContextFactory#updateRelations`.\n\t//\n\t// @private\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @param {String} relation\n\t_setRelation( opA, opB, relation ) {\n\t\t// As always, setting is for original operations, not the clones/transformed operations.\n\t\tconst origA = this.originalOperations.get( opA );\n\t\tconst origB = this.originalOperations.get( opB );\n\n\t\tlet relationsA = this._relations.get( origA );\n\n\t\tif ( !relationsA ) {\n\t\t\trelationsA = new Map();\n\t\t\tthis._relations.set( origA, relationsA );\n\t\t}\n\n\t\trelationsA.set( origB, relation );\n\t}\n}\n\n/**\n * Holds additional contextual information about a transformed pair of operations (`a` and `b`). Those information\n * can be used for better conflict resolving.\n *\n * @typedef {Object} module:engine/model/operation/transform~TransformationContext\n *\n * @property {Boolean} aIsStrong Whether `a` is strong operation in this transformation, or weak.\n * @property {Boolean} aWasUndone Whether `a` operation was undone.\n * @property {Boolean} bWasUndone Whether `b` operation was undone.\n * @property {String|null} abRelation The relation between `a` operation and an operation undone by `b` operation.\n * @property {String|null} baRelation The relation between `b` operation and an operation undone by `a` operation.\n */\n\n/**\n * An utility function that updates {@link module:engine/model/operation/operation~Operation#baseVersion base versions}\n * of passed operations.\n *\n * The function simply sets `baseVersion` as a base version of the first passed operation and then increments it for\n * each following operation in `operations`.\n *\n * @private\n * @param {Array.<module:engine/model/operation/operation~Operation>} operations Operations to update.\n * @param {Number} baseVersion Base version to set for the first operation in `operations`.\n */\nfunction updateBaseVersions( operations, baseVersion ) {\n\tfor ( const operation of operations ) {\n\t\toperation.baseVersion = baseVersion++;\n\t}\n}\n\n/**\n * Adds `howMany` instances of {@link module:engine/model/operation/nooperation~NoOperation} to `operations` set.\n *\n * @private\n * @param {Array.<module:engine/model/operation/operation~Operation>} operations\n * @param {Number} howMany\n */\nfunction padWithNoOps( operations, howMany ) {\n\tfor ( let i = 0; i < howMany; i++ ) {\n\t\toperations.push( new NoOperation( 0 ) );\n\t}\n}\n\n// -----------------------\n\nsetTransformation( AttributeOperation, AttributeOperation, ( a, b, context ) => {\n\tif ( a.key === b.key ) {\n\t\t// If operations attributes are in conflict, check if their ranges intersect and manage them properly.\n\n\t\t// First, we want to apply change to the part of a range that has not been changed by the other operation.\n\t\tconst operations = a.range.getDifference( b.range ).map( range => {\n\t\t\treturn new AttributeOperation( range, a.key, a.oldValue, a.newValue, 0 );\n\t\t} );\n\n\t\t// Then we take care of the common part of ranges.\n\t\tconst common = a.range.getIntersection( b.range );\n\n\t\tif ( common ) {\n\t\t\t// If this operation is more important, we also want to apply change to the part of the\n\t\t\t// original range that has already been changed by the other operation. Since that range\n\t\t\t// got changed we also have to update `oldValue`.\n\t\t\tif ( context.aIsStrong ) {\n\t\t\t\toperations.push( new AttributeOperation( common, b.key, b.newValue, a.newValue, 0 ) );\n\t\t\t}\n\t\t}\n\n\t\tif ( operations.length == 0 ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\treturn operations;\n\t} else {\n\t\t// If operations don't conflict, simply return an array containing just a clone of this operation.\n\t\treturn [ a ];\n\t}\n} );\n\nsetTransformation( AttributeOperation, InsertOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// The attribute operation range includes the position where nodes were inserted.\n\t// There are two possible scenarios: the inserted nodes were text and they should receive attributes or\n\t// the inserted nodes were elements and they should not receive attributes.\n\t//\n\tif ( a.range.start.hasSameParentAs( b.position ) && a.range.containsPosition( b.position ) ) {\n\t\t// If new nodes should not receive attributes, two separated ranges will be returned.\n\t\t// Otherwise, one expanded range will be returned.\n\t\tconst range = a.range._getTransformedByInsertion( b.position, b.howMany, !b.shouldReceiveAttributes );\n\t\tconst result = range.map( r => {\n\t\t\treturn new AttributeOperation( r, a.key, a.oldValue, a.newValue, a.baseVersion );\n\t\t} );\n\n\t\tif ( b.shouldReceiveAttributes ) {\n\t\t\t// `AttributeOperation#range` includes some newly inserted text.\n\t\t\t// The operation should also change the attribute of that text. An example:\n\t\t\t//\n\t\t\t// Bold should be applied on the following range:\n\t\t\t// <p>Fo[zb]ar</p>\n\t\t\t//\n\t\t\t// In meantime, new text is typed:\n\t\t\t// <p>Fozxxbar</p>\n\t\t\t//\n\t\t\t// Bold should be applied also on the new text:\n\t\t\t// <p>Fo[zxxb]ar</p>\n\t\t\t// <p>Fo<$text bold=\"true\">zxxb</$text>ar</p>\n\t\t\t//\n\t\t\t// There is a special case to consider here to consider.\n\t\t\t//\n\t\t\t// Consider setting an attribute with multiple possible values, for example `highlight`. The inserted text might\n\t\t\t// have already an attribute value applied and the `oldValue` property of the attribute operation might be wrong:\n\t\t\t//\n\t\t\t// Attribute `highlight=\"yellow\"` should be applied on the following range:\n\t\t\t// <p>Fo[zb]ar<p>\n\t\t\t//\n\t\t\t// In meantime, character `x` with `highlight=\"red\"` is typed:\n\t\t\t// <p>Fo[z<$text highlight=\"red\">x</$text>b]ar</p>\n\t\t\t//\n\t\t\t// In this case we cannot simply apply operation changing the attribute value from `null` to `\"yellow\"` for the whole range\n\t\t\t// because that would lead to an exception (`oldValue` is incorrect for `x`).\n\t\t\t//\n\t\t\t// We also cannot break the original range as this would mess up a scenario when there are multiple following\n\t\t\t// insert operations, because then only the first inserted character is included in those ranges:\n\t\t\t// <p>Fo[z][x][b]ar</p> --> <p>Fo[z][x]x[b]ar</p> --> <p>Fo[z][x]xx[b]ar</p>\n\t\t\t//\n\t\t\t// So, the attribute range needs be expanded, no matter what attributes are set on the inserted nodes:\n\t\t\t//\n\t\t\t// <p>Fo[z<$text highlight=\"red\">x</$text>b]ar</p> <--- Change from `null` to `yellow`, throwing an exception.\n\t\t\t//\n\t\t\t// But before that operation would be applied, we will add an additional attribute operation that will change\n\t\t\t// attributes on the inserted nodes in a way which would make the original operation correct:\n\t\t\t//\n\t\t\t// <p>Fo[z{<$text highlight=\"red\">}x</$text>b]ar</p> <--- Change range `{}` from `red` to `null`.\n\t\t\t// <p>Fo[zxb]ar</p> <--- Now change from `null` to `yellow` is completely fine.\n\t\t\t//\n\n\t\t\t// Generate complementary attribute operation. Be sure to add it before the original operation.\n\t\t\tconst op = _getComplementaryAttributeOperations( b, a.key, a.oldValue );\n\n\t\t\tif ( op ) {\n\t\t\t\tresult.unshift( op );\n\t\t\t}\n\t\t}\n\n\t\t// If nodes should not receive new attribute, we are done here.\n\t\treturn result;\n\t}\n\n\t// If insert operation is not expanding the attribute operation range, simply transform the range.\n\ta.range = a.range._getTransformedByInsertion( b.position, b.howMany, false )[ 0 ];\n\n\treturn [ a ];\n} );\n\n/**\n * Helper function for `AttributeOperation` x `InsertOperation` (and reverse) transformation.\n *\n * For given `insertOperation` it checks the inserted node if it has an attribute `key` set to a value different\n * than `newValue`. If so, it generates an `AttributeOperation` which changes the value of `key` attribute to `newValue`.\n *\n * @private\n * @param {module:engine/model/operation/insertoperation~InsertOperation} insertOperation\n * @param {String} key\n * @param {*} newValue\n * @returns {module:engine/model/operation/attributeoperation~AttributeOperation|null}\n */\nfunction _getComplementaryAttributeOperations( insertOperation, key, newValue ) {\n\tconst nodes = insertOperation.nodes;\n\n\t// At the beginning we store the attribute value from the first node.\n\tconst insertValue = nodes.getNode( 0 ).getAttribute( key );\n\n\tif ( insertValue == newValue ) {\n\t\treturn null;\n\t}\n\n\tconst range = new Range( insertOperation.position, insertOperation.position.getShiftedBy( insertOperation.howMany ) );\n\n\treturn new AttributeOperation( range, key, insertValue, newValue, 0 );\n}\n\nsetTransformation( AttributeOperation, MergeOperation, ( a, b ) => {\n\tconst ranges = [];\n\n\t// Case 1:\n\t//\n\t// Attribute change on the merged element. In this case, the merged element was moved to the graveyard.\n\t// An additional attribute operation that will change the (re)moved element needs to be generated.\n\t//\n\tif ( a.range.start.hasSameParentAs( b.deletionPosition ) ) {\n\t\tif ( a.range.containsPosition( b.deletionPosition ) || a.range.start.isEqual( b.deletionPosition ) ) {\n\t\t\tranges.push( Range._createFromPositionAndShift( b.graveyardPosition, 1 ) );\n\t\t}\n\t}\n\n\tconst range = a.range._getTransformedByMergeOperation( b );\n\n\t// Do not add empty (collapsed) ranges to the result. `range` may be collapsed if it contained only the merged element.\n\tif ( !range.isCollapsed ) {\n\t\tranges.push( range );\n\t}\n\n\t// Create `AttributeOperation`s out of the ranges.\n\treturn ranges.map( range => {\n\t\treturn new AttributeOperation( range, a.key, a.oldValue, a.newValue, a.baseVersion );\n\t} );\n} );\n\nsetTransformation( AttributeOperation, MoveOperation, ( a, b ) => {\n\tconst ranges = _breakRangeByMoveOperation( a.range, b );\n\n\t// Create `AttributeOperation`s out of the ranges.\n\treturn ranges.map( range => new AttributeOperation( range, a.key, a.oldValue, a.newValue, a.baseVersion ) );\n} );\n\n// Helper function for `AttributeOperation` x `MoveOperation` transformation.\n//\n// Takes the passed `range` and transforms it by move operation `moveOp` in a specific way. Only top-level nodes of `range`\n// are considered to be in the range. If move operation moves nodes deep from inside of the range, those nodes won't\n// be included in the result. In other words, top-level nodes of the ranges from the result are exactly the same as\n// top-level nodes of the original `range`.\n//\n// This is important for `AttributeOperation` because, for its range, it changes only the top-level nodes. So we need to\n// track only how those nodes have been affected by `MoveOperation`.\n//\n// @private\n// @param {module:engine/model/range~Range} range\n// @param {module:engine/model/operation/moveoperation~MoveOperation} moveOp\n// @returns {Array.<module:engine/model/range~Range>}\nfunction _breakRangeByMoveOperation( range, moveOp ) {\n\tconst moveRange = Range._createFromPositionAndShift( moveOp.sourcePosition, moveOp.howMany );\n\n\t// We are transforming `range` (original range) by `moveRange` (range moved by move operation). As usual when it comes to\n\t// transforming a ranges, we may have a common part of the ranges and we may have a difference part (zero to two ranges).\n\tlet common = null;\n\tlet difference = [];\n\n\t// Let's compare the ranges.\n\tif ( moveRange.containsRange( range, true ) ) {\n\t\t// If the whole original range is moved, treat it whole as a common part. There's also no difference part.\n\t\tcommon = range;\n\t} else if ( range.start.hasSameParentAs( moveRange.start ) ) {\n\t\t// If the ranges are \"on the same level\" (in the same parent) then move operation may move exactly those nodes\n\t\t// that are changed by the attribute operation. In this case we get common part and difference part in the usual way.\n\t\tdifference = range.getDifference( moveRange );\n\t\tcommon = range.getIntersection( moveRange );\n\t} else {\n\t\t// In any other situation we assume that original range is different than move range, that is that move operation\n\t\t// moves other nodes that attribute operation change. Even if the moved range is deep inside in the original range.\n\t\t//\n\t\t// Note that this is different than in `.getIntersection` (we would get a common part in that case) and different\n\t\t// than `.getDifference` (we would get two ranges).\n\t\tdifference = [ range ];\n\t}\n\n\tconst result = [];\n\n\t// The default behaviour of `_getTransformedByMove` might get wrong results for difference part, though, so\n\t// we do it by hand.\n\tfor ( let diff of difference ) {\n\t\t// First, transform the range by removing moved nodes. Since this is a difference, this is safe, `null` won't be returned\n\t\t// as the range is different than the moved range.\n\t\tdiff = diff._getTransformedByDeletion( moveOp.sourcePosition, moveOp.howMany );\n\n\t\t// Transform also `targetPosition`.\n\t\tconst targetPosition = moveOp.getMovedRangeStart();\n\n\t\t// Spread the range only if moved nodes are inserted only between the top-level nodes of the `diff` range.\n\t\tconst spread = diff.start.hasSameParentAs( targetPosition );\n\n\t\t// Transform by insertion of moved nodes.\n\t\tdiff = diff._getTransformedByInsertion( targetPosition, moveOp.howMany, spread );\n\n\t\tresult.push( ...diff );\n\t}\n\n\t// Common part can be simply transformed by the move operation. This is because move operation will not target to\n\t// that common part (the operation would have to target inside its own moved range).\n\tif ( common ) {\n\t\tresult.push(\n\t\t\tcommon._getTransformedByMove( moveOp.sourcePosition, moveOp.targetPosition, moveOp.howMany, false )[ 0 ]\n\t\t);\n\t}\n\n\treturn result;\n}\n\nsetTransformation( AttributeOperation, SplitOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// Split node is the last node in `AttributeOperation#range`.\n\t// `AttributeOperation#range` needs to be expanded to include the new (split) node.\n\t//\n\t// Attribute `type` to be changed to `numbered` but the `listItem` is split.\n\t// <listItem type=\"bulleted\">foobar</listItem>\n\t//\n\t// After split:\n\t// <listItem type=\"bulleted\">foo</listItem><listItem type=\"bulleted\">bar</listItem>\n\t//\n\t// After attribute change:\n\t// <listItem type=\"numbered\">foo</listItem><listItem type=\"numbered\">foo</listItem>\n\t//\n\tif ( a.range.end.isEqual( b.insertionPosition ) ) {\n\t\tif ( !b.graveyardPosition ) {\n\t\t\ta.range.end.offset++;\n\t\t}\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 2:\n\t//\n\t// Split position is inside `AttributeOperation#range`, at the same level, so the nodes to change are\n\t// not going to make a flat range.\n\t//\n\t// Content with range-to-change and split position:\n\t// <p>Fo[zb^a]r</p>\n\t//\n\t// After split:\n\t// <p>Fozb</p><p>ar</p>\n\t//\n\t// Make two separate ranges containing all nodes to change:\n\t// <p>Fo[zb]</p><p>[a]r</p>\n\t//\n\tif ( a.range.start.hasSameParentAs( b.splitPosition ) && a.range.containsPosition( b.splitPosition ) ) {\n\t\tconst secondPart = a.clone();\n\n\t\tsecondPart.range = new Range(\n\t\t\tb.moveTargetPosition.clone(),\n\t\t\ta.range.end._getCombined( b.splitPosition, b.moveTargetPosition )\n\t\t);\n\n\t\ta.range.end = b.splitPosition.clone();\n\t\ta.range.end.stickiness = 'toPrevious';\n\n\t\treturn [ a, secondPart ];\n\t}\n\n\t// The default case.\n\t//\n\ta.range = a.range._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, AttributeOperation, ( a, b ) => {\n\tconst result = [ a ];\n\n\t// Case 1:\n\t//\n\t// The attribute operation range includes the position where nodes were inserted.\n\t// There are two possible scenarios: the inserted nodes were text and they should receive attributes or\n\t// the inserted nodes were elements and they should not receive attributes.\n\t//\n\t// This is a mirror scenario to the one described in `AttributeOperation` x `InsertOperation` transformation,\n\t// although this case is a little less complicated. In this case we simply need to change attributes of the\n\t// inserted nodes and that's it.\n\t//\n\tif ( a.shouldReceiveAttributes && a.position.hasSameParentAs( b.range.start ) && b.range.containsPosition( a.position ) ) {\n\t\tconst op = _getComplementaryAttributeOperations( a, b.key, b.newValue );\n\n\t\tif ( op ) {\n\t\t\tresult.push( op );\n\t\t}\n\t}\n\n\t// The default case is: do nothing.\n\t// `AttributeOperation` does not change the model tree structure so `InsertOperation` does not need to be changed.\n\t//\n\treturn result;\n} );\n\nsetTransformation( InsertOperation, InsertOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Two insert operations insert nodes at the same position. Since they are the same, it needs to be decided\n\t// what will be the order of inserted nodes. However, there is no additional information to help in that\n\t// decision. Also, when `b` will be transformed by `a`, the same order must be maintained.\n\t//\n\t// To achieve that, we will check if the operation is strong.\n\t// If it is, it won't get transformed. If it is not, it will be moved.\n\t//\n\tif ( a.position.isEqual( b.position ) && context.aIsStrong ) {\n\t\treturn [ a ];\n\t}\n\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, MoveOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedByMoveOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, SplitOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, MergeOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MarkerOperation, InsertOperation, ( a, b ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedByInsertOperation( b )[ 0 ];\n\t}\n\n\tif ( a.newRange ) {\n\t\ta.newRange = a.newRange._getTransformedByInsertOperation( b )[ 0 ];\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MarkerOperation, ( a, b, context ) => {\n\tif ( a.name == b.name ) {\n\t\tif ( context.aIsStrong ) {\n\t\t\ta.oldRange = b.newRange ? b.newRange.clone() : null;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MergeOperation, ( a, b ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedByMergeOperation( b );\n\t}\n\n\tif ( a.newRange ) {\n\t\ta.newRange = a.newRange._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MoveOperation, ( a, b, context ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = Range._createFromRanges( a.oldRange._getTransformedByMoveOperation( b ) );\n\t}\n\n\tif ( a.newRange ) {\n\t\tif ( context.abRelation ) {\n\t\t\tconst aNewRange = Range._createFromRanges( a.newRange._getTransformedByMoveOperation( b ) );\n\n\t\t\tif ( context.abRelation.side == 'left' && b.targetPosition.isEqual( a.newRange.start ) ) {\n\t\t\t\ta.newRange.start.path = context.abRelation.path;\n\t\t\t\ta.newRange.end = aNewRange.end;\n\n\t\t\t\treturn [ a ];\n\t\t\t} else if ( context.abRelation.side == 'right' && b.targetPosition.isEqual( a.newRange.end ) ) {\n\t\t\t\ta.newRange.start = aNewRange.start;\n\t\t\t\ta.newRange.end.path = context.abRelation.path;\n\n\t\t\t\treturn [ a ];\n\t\t\t}\n\t\t}\n\n\t\ta.newRange = Range._createFromRanges( a.newRange._getTransformedByMoveOperation( b ) );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, SplitOperation, ( a, b, context ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedBySplitOperation( b );\n\t}\n\n\tif ( a.newRange ) {\n\t\tif ( context.abRelation ) {\n\t\t\tconst aNewRange = a.newRange._getTransformedBySplitOperation( b );\n\n\t\t\tif ( a.newRange.start.isEqual( b.splitPosition ) && context.abRelation.wasStartBeforeMergedElement ) {\n\t\t\t\ta.newRange.start = Position._createAt( b.insertionPosition );\n\t\t\t} else if ( a.newRange.start.isEqual( b.splitPosition ) && !context.abRelation.wasInLeftElement ) {\n\t\t\t\ta.newRange.start = Position._createAt( b.moveTargetPosition );\n\t\t\t}\n\n\t\t\tif ( a.newRange.end.isEqual( b.splitPosition ) && context.abRelation.wasInRightElement ) {\n\t\t\t\ta.newRange.end = Position._createAt( b.moveTargetPosition );\n\t\t\t} else if ( a.newRange.end.isEqual( b.splitPosition ) && context.abRelation.wasEndBeforeMergedElement ) {\n\t\t\t\ta.newRange.end = Position._createAt( b.insertionPosition );\n\t\t\t} else {\n\t\t\t\ta.newRange.end = aNewRange.end;\n\t\t\t}\n\n\t\t\treturn [ a ];\n\t\t}\n\n\t\ta.newRange = a.newRange._getTransformedBySplitOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MergeOperation, InsertOperation, ( a, b ) => {\n\tif ( a.sourcePosition.hasSameParentAs( b.position ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByInsertOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, MergeOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Same merge operations.\n\t//\n\t// Both operations have same source and target positions. So the element already got merged and there is\n\t// theoretically nothing to do.\n\t//\n\tif ( a.sourcePosition.isEqual( b.sourcePosition ) && a.targetPosition.isEqual( b.targetPosition ) ) {\n\t\t// There are two ways that we can provide a do-nothing operation.\n\t\t//\n\t\t// First is simply a NoOperation instance. We will use it if `b` operation was not undone.\n\t\t//\n\t\t// Second is a merge operation that has the source operation in the merged element - in the graveyard -\n\t\t// same target position and `howMany` equal to `0`. So it is basically merging an empty element from graveyard\n\t\t// which is almost the same as NoOperation.\n\t\t//\n\t\t// This way the merge operation can be later transformed by split operation\n\t\t// to provide correct undo. This will be used if `b` operation was undone (only then it is correct).\n\t\t//\n\t\tif ( !context.bWasUndone ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t} else {\n\t\t\tconst path = b.graveyardPosition.path.slice();\n\t\t\tpath.push( 0 );\n\n\t\t\ta.sourcePosition = new Position( b.graveyardPosition.root, path );\n\t\t\ta.howMany = 0;\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Same merge source position but different target position.\n\t//\n\t// This can happen during collaboration. For example, if one client merged a paragraph to the previous paragraph\n\t// and the other person removed that paragraph and merged the same paragraph to something before:\n\t//\n\t// Client A:\n\t// <p>Foo</p><p>Bar</p><p>[]Xyz</p>\n\t// <p>Foo</p><p>BarXyz</p>\n\t//\n\t// Client B:\n\t// <p>Foo</p>[<p>Bar</p>]<p>Xyz</p>\n\t// <p>Foo</p><p>[]Xyz</p>\n\t// <p>FooXyz</p>\n\t//\n\t// In this case we need to decide where finally \"Xyz\" will land:\n\t//\n\t// <p>FooXyz</p> graveyard: <p>Bar</p>\n\t// <p>Foo</p> graveyard: <p>BarXyz</p>\n\t//\n\t// Let's move it in a way so that a merge operation that does not target to graveyard is more important so that\n\t// nodes does not end up in the graveyard. It makes sense. Both for Client A and for Client B \"Xyz\" finally did not\n\t// end up in the graveyard (see above).\n\t//\n\t// If neither or both operations point to graveyard, then let `aIsStrong` decide.\n\t//\n\tif (\n\t\ta.sourcePosition.isEqual( b.sourcePosition ) && !a.targetPosition.isEqual( b.targetPosition ) &&\n\t\t!context.bWasUndone && context.abRelation != 'splitAtSource'\n\t) {\n\t\tconst aToGraveyard = a.targetPosition.root.rootName == '$graveyard';\n\t\tconst bToGraveyard = b.targetPosition.root.rootName == '$graveyard';\n\n\t\t// If `aIsWeak` it means that `a` points to graveyard while `b` doesn't. Don't move nodes then.\n\t\tconst aIsWeak = aToGraveyard && !bToGraveyard;\n\n\t\t// If `bIsWeak` it means that `b` points to graveyard while `a` doesn't. Force moving nodes then.\n\t\tconst bIsWeak = bToGraveyard && !aToGraveyard;\n\n\t\t// Force move if `b` is weak or neither operation is weak but `a` is stronger through `context.aIsStrong`.\n\t\tconst forceMove = bIsWeak || ( !aIsWeak && context.aIsStrong );\n\n\t\tif ( forceMove ) {\n\t\t\tconst sourcePosition = b.targetPosition._getTransformedByMergeOperation( b );\n\t\t\tconst targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\treturn [ new MoveOperation( sourcePosition, a.howMany, targetPosition, 0 ) ];\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByMergeOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t// Handle positions in graveyard.\n\t// If graveyard positions are same and `a` operation is strong - do not transform.\n\tif ( !a.graveyardPosition.isEqual( b.graveyardPosition ) || !context.aIsStrong ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, MoveOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// The element to merge got removed.\n\t//\n\t// Merge operation does support merging elements which are not siblings. So it would not be a problem\n\t// from technical point of view. However, if the element was removed, the intention of the user deleting it\n\t// was to have it all deleted, together with its children. From user experience point of view, moving back the\n\t// removed nodes might be unexpected. This means that in this scenario we will block the merging.\n\t//\n\t// The exception of this rule would be if the remove operation was later undone.\n\t//\n\tconst removedRange = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\tif ( b.type == 'remove' && !context.bWasUndone && !context.forceWeakRemove ) {\n\t\tif ( a.deletionPosition.hasSameParentAs( b.sourcePosition ) && removedRange.containsPosition( a.sourcePosition ) ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\tif ( a.sourcePosition.hasSameParentAs( b.sourcePosition ) ) {\n\t\ta.howMany -= b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByMoveOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByMoveOperation( b );\n\n\t// `MergeOperation` graveyard position is like `MoveOperation` target position. It is a position where element(s) will\n\t// be moved. Like in other similar cases, we need to consider the scenario when those positions are same.\n\t// Here, we will treat `MergeOperation` like it is always strong (see `InsertOperation` x `InsertOperation` for comparison).\n\t// This means that we won't transform graveyard position if it is equal to move operation target position.\n\tif ( !a.graveyardPosition.isEqual( b.targetPosition ) ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, SplitOperation, ( a, b, context ) => {\n\tif ( b.graveyardPosition ) {\n\t\t// If `b` operation defines graveyard position, a node from graveyard will be moved. This means that we need to\n\t\t// transform `a.graveyardPosition` accordingly.\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByDeletion( b.graveyardPosition, 1 );\n\n\t\t// This is a scenario foreseen in `MergeOperation` x `MergeOperation`, with two identical merge operations.\n\t\t//\n\t\t// So, there was `MergeOperation` x `MergeOperation` transformation earlier. Now, `a` is a merge operation which\n\t\t// source position is in graveyard. Interestingly, split operation wants to use the node to be merged by `a`. This\n\t\t// means that `b` is undoing that merge operation from earlier, which caused `a` to be in graveyard.\n\t\t//\n\t\t// If that's the case, at this point, we will only \"fix\" `a.howMany`. It was earlier set to `0` in\n\t\t// `MergeOperation` x `MergeOperation` transformation. Later transformations in this function will change other\n\t\t// properties.\n\t\t//\n\t\tif ( a.deletionPosition.isEqual( b.graveyardPosition ) ) {\n\t\t\ta.howMany = b.howMany;\n\t\t}\n\t}\n\n\t// Case 1:\n\t//\n\t// Merge operation moves nodes to the place where split happens.\n\t// This is a classic situation when there are two paragraphs, and there is a split (enter) after the first\n\t// paragraph and there is a merge (delete) at the beginning of the second paragraph:\n\t//\n\t// <p>Foo{}</p><p>[]Bar</p>.\n\t//\n\t// Split is after `Foo`, while merge is from `Bar` to the end of `Foo`.\n\t//\n\t// State after split:\n\t// <p>Foo</p><p></p><p>Bar</p>\n\t//\n\t// Now, `Bar` should be merged to the new paragraph:\n\t// <p>Foo</p><p>Bar</p>\n\t//\n\t// Instead of merging it to the original paragraph:\n\t// <p>FooBar</p><p></p>\n\t//\n\t// This means that `targetPosition` needs to be transformed. This is the default case though.\n\t// For example, if the split would be after `F`, `targetPosition` should also be transformed.\n\t//\n\t// There are three exceptions, though, when we want to keep `targetPosition` as it was.\n\t//\n\t// First exception is when the merge target position is inside an element (not at the end, as usual). This\n\t// happens when the merge operation earlier was transformed by \"the same\" merge operation. If merge operation\n\t// targets inside the element we want to keep the original target position (and not transform it) because\n\t// we have additional context telling us that we want to merge to the original element. We can check if the\n\t// merge operation points inside element by checking what is `SplitOperation#howMany`. Since merge target position\n\t// is same as split position, if `howMany` is non-zero, it means that the merge target position is inside an element.\n\t//\n\t// Second exception is when the element to merge is in the graveyard and split operation uses it. In that case\n\t// if target position would be transformed, the merge operation would target at the source position:\n\t//\n\t// root: <p>Foo</p>\t\t\t\tgraveyard: <p></p>\n\t//\n\t// SplitOperation: root [ 0, 3 ] using graveyard [ 0 ] (howMany = 0)\n\t// MergeOperation: graveyard [ 0, 0 ] -> root [ 0, 3 ] (howMany = 0)\n\t//\n\t// Since split operation moves the graveyard node back to the root, the merge operation source position changes.\n\t// We would like to merge from the empty <p> to the \"Foo\" <p>:\n\t//\n\t// root: <p>Foo</p><p></p>\t\t\tgraveyard:\n\t//\n\t// MergeOperation#sourcePosition = root [ 1, 0 ]\n\t//\n\t// If `targetPosition` is transformed, it would become root [ 1, 0 ] as well. It has to be kept as it was.\n\t//\n\t// Third exception is connected with relations. If this happens during undo and we have explicit information\n\t// that target position has not been affected by the operation which is undone by this split then this split should\n\t// not move the target position either.\n\t//\n\tif ( a.targetPosition.isEqual( b.splitPosition ) ) {\n\t\tconst mergeInside = b.howMany != 0;\n\t\tconst mergeSplittingElement = b.graveyardPosition && a.deletionPosition.isEqual( b.graveyardPosition );\n\n\t\tif ( mergeInside || mergeSplittingElement || context.abRelation == 'mergeTargetNotMoved' ) {\n\t\t\ta.sourcePosition = a.sourcePosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Merge source is at the same position as split position. This sometimes happen, mostly during undo.\n\t// The decision here is mostly to choose whether merge source position should stay where it is (so it will be at the end of the\n\t// split element) or should be move to the beginning of the new element.\n\t//\n\tif ( a.sourcePosition.isEqual( b.splitPosition ) ) {\n\t\t// Use context to check if `SplitOperation` is not undoing a merge operation, that didn't change the `a` operation.\n\t\t// This scenario happens the undone merge operation moved nodes at the source position of `a` operation.\n\t\t// In that case `a` operation source position should stay where it is.\n\t\tif ( context.abRelation == 'mergeSourceNotMoved' ) {\n\t\t\ta.howMany = 0;\n\t\t\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\n\t\t// This merge operation might have been earlier transformed by a merge operation which both merged the same element.\n\t\t// See that case in `MergeOperation` x `MergeOperation` transformation. In that scenario, if the merge operation has been undone,\n\t\t// the special case is not applied.\n\t\t//\n\t\t// Now, the merge operation is transformed by the split which has undone that previous merge operation.\n\t\t// So now we are fixing situation which was skipped in `MergeOperation` x `MergeOperation` case.\n\t\t//\n\t\tif ( context.abRelation == 'mergeSameElement' || a.sourcePosition.offset > 0 ) {\n\t\t\ta.sourcePosition = b.moveTargetPosition.clone();\n\t\t\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.splitPosition ) ) {\n\t\ta.howMany = b.splitPosition.offset;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedBySplitOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MoveOperation, InsertOperation, ( a, b ) => {\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst transformed = moveRange._getTransformedByInsertOperation( b, false )[ 0 ];\n\n\ta.sourcePosition = transformed.start;\n\ta.howMany = transformed.end.offset - transformed.start.offset;\n\n\t// See `InsertOperation` x `MoveOperation` transformation for details on this case.\n\t//\n\t// In summary, both operations point to the same place, so the order of nodes needs to be decided.\n\t// `MoveOperation` is considered weaker, so it is always transformed, unless there was a certain relation\n\t// between operations.\n\t//\n\tif ( !a.targetPosition.isEqual( b.position ) ) {\n\t\ta.targetPosition = a.targetPosition._getTransformedByInsertOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MoveOperation, MoveOperation, ( a, b, context ) => {\n\t//\n\t// Setting and evaluating some variables that will be used in special cases and default algorithm.\n\t//\n\t// Create ranges from `MoveOperations` properties.\n\tconst rangeA = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst rangeB = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\t// Assign `context.aIsStrong` to a different variable, because the value may change during execution of\n\t// this algorithm and we do not want to override original `context.aIsStrong` that will be used in later transformations.\n\tlet aIsStrong = context.aIsStrong;\n\n\t// This will be used to decide the order of nodes if both operations target at the same position.\n\t// By default, use strong/weak operation mechanism.\n\tlet insertBefore = !context.aIsStrong;\n\n\t// If the relation is set, then use it to decide nodes order.\n\tif ( context.abRelation == 'insertBefore' || context.baRelation == 'insertAfter' ) {\n\t\tinsertBefore = true;\n\t} else if ( context.abRelation == 'insertAfter' || context.baRelation == 'insertBefore' ) {\n\t\tinsertBefore = false;\n\t}\n\n\t// `a.targetPosition` could be affected by the `b` operation. We will transform it.\n\tlet newTargetPosition;\n\n\tif ( a.targetPosition.isEqual( b.targetPosition ) && insertBefore ) {\n\t\tnewTargetPosition = a.targetPosition._getTransformedByDeletion(\n\t\t\tb.sourcePosition,\n\t\t\tb.howMany\n\t\t);\n\t} else {\n\t\tnewTargetPosition = a.targetPosition._getTransformedByMove(\n\t\t\tb.sourcePosition,\n\t\t\tb.targetPosition,\n\t\t\tb.howMany\n\t\t);\n\t}\n\n\t//\n\t// Special case #1 + mirror.\n\t//\n\t// Special case when both move operations' target positions are inside nodes that are\n\t// being moved by the other move operation. So in other words, we move ranges into inside of each other.\n\t// This case can't be solved reasonably (on the other hand, it should not happen often).\n\tif ( _moveTargetIntoMovedRange( a, b ) && _moveTargetIntoMovedRange( b, a ) ) {\n\t\t// Instead of transforming operation, we return a reverse of the operation that we transform by.\n\t\t// So when the results of this \"transformation\" will be applied, `b` MoveOperation will get reversed.\n\t\treturn [ b.getReversed() ];\n\t}\n\t//\n\t// End of special case #1.\n\t//\n\n\t//\n\t// Special case #2.\n\t//\n\t// Check if `b` operation targets inside `rangeA`.\n\tconst bTargetsToA = rangeA.containsPosition( b.targetPosition );\n\n\t// If `b` targets to `rangeA` and `rangeA` contains `rangeB`, `b` operation has no influence on `a` operation.\n\t// You might say that operation `b` is captured inside operation `a`.\n\tif ( bTargetsToA && rangeA.containsRange( rangeB, true ) ) {\n\t\t// There is a mini-special case here, where `rangeB` is on other level than `rangeA`. That's why\n\t\t// we need to transform `a` operation anyway.\n\t\trangeA.start = rangeA.start._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\t\trangeA.end = rangeA.end._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\n\t//\n\t// Special case #2 mirror.\n\t//\n\tconst aTargetsToB = rangeB.containsPosition( a.targetPosition );\n\n\tif ( aTargetsToB && rangeB.containsRange( rangeA, true ) ) {\n\t\t// `a` operation is \"moved together\" with `b` operation.\n\t\t// Here, just move `rangeA` \"inside\" `rangeB`.\n\t\trangeA.start = rangeA.start._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\t\trangeA.end = rangeA.end._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\t//\n\t// End of special case #2.\n\t//\n\n\t//\n\t// Special case #3 + mirror.\n\t//\n\t// `rangeA` has a node which is an ancestor of `rangeB`. In other words, `rangeB` is inside `rangeA`\n\t// but not on the same tree level. In such case ranges have common part but we have to treat it\n\t// differently, because in such case those ranges are not really conflicting and should be treated like\n\t// two separate ranges. Also we have to discard two difference parts.\n\tconst aCompB = compareArrays( a.sourcePosition.getParentPath(), b.sourcePosition.getParentPath() );\n\n\tif ( aCompB == 'prefix' || aCompB == 'extension' ) {\n\t\t// Transform `rangeA` by `b` operation and make operation out of it, and that's all.\n\t\t// Note that this is a simplified version of default case, but here we treat the common part (whole `rangeA`)\n\t\t// like a one difference part.\n\t\trangeA.start = rangeA.start._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\t\trangeA.end = rangeA.end._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\t//\n\t// End of special case #3.\n\t//\n\n\t//\n\t// Default case - ranges are on the same level or are not connected with each other.\n\t//\n\t// Modifier for default case.\n\t// Modifies `aIsStrong` flag in certain conditions.\n\t//\n\t// If only one of operations is a remove operation, we force remove operation to be the \"stronger\" one\n\t// to provide more expected results.\n\tif ( a.type == 'remove' && b.type != 'remove' && !context.aWasUndone && !context.forceWeakRemove ) {\n\t\taIsStrong = true;\n\t} else if ( a.type != 'remove' && b.type == 'remove' && !context.bWasUndone && !context.forceWeakRemove ) {\n\t\taIsStrong = false;\n\t}\n\n\t// Handle operation's source ranges - check how `rangeA` is affected by `b` operation.\n\t// This will aggregate transformed ranges.\n\tconst ranges = [];\n\n\t// Get the \"difference part\" of `a` operation source range.\n\t// This is an array with one or two ranges. Two ranges if `rangeB` is inside `rangeA`.\n\tconst difference = rangeA.getDifference( rangeB );\n\n\tfor ( const range of difference ) {\n\t\t// Transform those ranges by `b` operation. For example if `b` moved range from before those ranges, fix those ranges.\n\t\trange.start = range.start._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\t\trange.end = range.end._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\n\t\t// If `b` operation targets into `rangeA` on the same level, spread `rangeA` into two ranges.\n\t\tconst shouldSpread = compareArrays( range.start.getParentPath(), b.getMovedRangeStart().getParentPath() ) == 'same';\n\t\tconst newRanges = range._getTransformedByInsertion( b.getMovedRangeStart(), b.howMany, shouldSpread );\n\n\t\tranges.push( ...newRanges );\n\t}\n\n\t// Then, we have to manage the \"common part\" of both move ranges.\n\tconst common = rangeA.getIntersection( rangeB );\n\n\tif ( common !== null && aIsStrong ) {\n\t\t// Calculate the new position of that part of original range.\n\t\tcommon.start = common.start._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\t\tcommon.end = common.end._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\n\t\t// Take care of proper range order.\n\t\t//\n\t\t// Put `common` at appropriate place. Keep in mind that we are interested in original order.\n\t\t// Basically there are only three cases: there is zero, one or two difference ranges.\n\t\t//\n\t\t// If there is zero difference ranges, just push `common` in the array.\n\t\tif ( ranges.length === 0 ) {\n\t\t\tranges.push( common );\n\t\t}\n\t\t// If there is one difference range, we need to check whether common part was before it or after it.\n\t\telse if ( ranges.length == 1 ) {\n\t\t\tif ( rangeB.start.isBefore( rangeA.start ) || rangeB.start.isEqual( rangeA.start ) ) {\n\t\t\t\tranges.unshift( common );\n\t\t\t} else {\n\t\t\t\tranges.push( common );\n\t\t\t}\n\t\t}\n\t\t// If there are more ranges (which means two), put common part between them. This is the only scenario\n\t\t// where there could be two difference ranges so we don't have to make any comparisons.\n\t\telse {\n\t\t\tranges.splice( 1, 0, common );\n\t\t}\n\t}\n\n\tif ( ranges.length === 0 ) {\n\t\t// If there are no \"source ranges\", nothing should be changed.\n\t\t// Note that this can happen only if `aIsStrong == false` and `rangeA.isEqual( rangeB )`.\n\t\treturn [ new NoOperation( a.baseVersion ) ];\n\t}\n\n\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n} );\n\nsetTransformation( MoveOperation, SplitOperation, ( a, b, context ) => {\n\tlet newTargetPosition = a.targetPosition.clone();\n\n\t// Do not transform if target position is same as split insertion position and this split comes from undo.\n\t// This should be done on relations but it is too much work for now as it would require relations working in collaboration.\n\t// We need to make a decision how we will resolve such conflict and this is less harmful way.\n\tif ( !a.targetPosition.isEqual( b.insertionPosition ) || !b.graveyardPosition || context.abRelation == 'moveTargetAfter' ) {\n\t\tnewTargetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\t}\n\n\t// Case 1:\n\t//\n\t// Last element in the moved range got split.\n\t//\n\t// In this case the default range transformation will not work correctly as the element created by\n\t// split operation would be outside the range. The range to move needs to be fixed manually.\n\t//\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\n\tif ( moveRange.end.isEqual( b.insertionPosition ) ) {\n\t\t// Do it only if this is a \"natural\" split, not a one that comes from undo.\n\t\t// If this is undo split, only `targetPosition` needs to be changed (if the move is a remove).\n\t\tif ( !b.graveyardPosition ) {\n\t\t\ta.howMany++;\n\t\t}\n\n\t\ta.targetPosition = newTargetPosition;\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 2:\n\t//\n\t// Split happened between the moved nodes. In this case two ranges to move need to be generated.\n\t//\n\t// Characters `ozba` are moved to the end of paragraph `Xyz` but split happened.\n\t// <p>F[oz|ba]r</p><p>Xyz</p>\n\t//\n\t// After split:\n\t// <p>F[oz</p><p>ba]r</p><p>Xyz</p>\n\t//\n\t// Correct ranges:\n\t// <p>F[oz]</p><p>[ba]r</p><p>Xyz</p>\n\t//\n\t// After move:\n\t// <p>F</p><p>r</p><p>Xyzozba</p>\n\t//\n\tif ( moveRange.start.hasSameParentAs( b.splitPosition ) && moveRange.containsPosition( b.splitPosition ) ) {\n\t\tlet rightRange = new Range( b.splitPosition, moveRange.end );\n\t\trightRange = rightRange._getTransformedBySplitOperation( b );\n\n\t\tconst ranges = [\n\t\t\tnew Range( moveRange.start, b.splitPosition ),\n\t\t\trightRange\n\t\t];\n\n\t\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n\t}\n\n\t// Case 3:\n\t//\n\t// Move operation targets at the split position. We need to decide if the nodes should be inserted\n\t// at the end of the split element or at the beginning of the new element.\n\t//\n\tif ( a.targetPosition.isEqual( b.splitPosition ) && context.abRelation == 'insertAtSource' ) {\n\t\tnewTargetPosition = b.moveTargetPosition;\n\t}\n\n\t// Case 4:\n\t//\n\t// Move operation targets just after the split element. We need to decide if the nodes should be inserted\n\t// between two parts of split element, or after the new element.\n\t//\n\t// Split at `|`, while move operation moves `<p>Xyz</p>` and targets at `^`:\n\t// <p>Foo|bar</p>^<p>baz</p>\n\t// <p>Foo</p>^<p>bar</p><p>baz</p> or <p>Foo</p><p>bar</p>^<p>baz</p>?\n\t//\n\t// If there is no contextual information between operations (for example, they come from collaborative\n\t// editing), we don't want to put some unrelated content (move) between parts of related content (split parts).\n\t// However, if the split is from undo, in the past, the moved content might be targeting between the\n\t// split parts, meaning that was exactly user's intention:\n\t//\n\t// <p>Foo</p>^<p>bar</p>\t\t<--- original situation, in \"past\".\n\t// <p>Foobar</p>^\t\t\t\t<--- after merge target position is transformed.\n\t// <p>Foo|bar</p>^\t\t\t\t<--- then the merge is undone, and split happens, which leads us to current situation.\n\t//\n\t// In this case it is pretty clear that the intention was to put new paragraph between those nodes,\n\t// so we need to transform accordingly. We can detect this scenario thanks to relations.\n\t//\n\tif ( a.targetPosition.isEqual( b.insertionPosition ) && context.abRelation == 'insertBetween' ) {\n\t\tnewTargetPosition = a.targetPosition;\n\t}\n\n\t// The default case.\n\t//\n\tconst transformed = moveRange._getTransformedBySplitOperation( b );\n\tconst ranges = [ transformed ];\n\n\t// Case 5:\n\t//\n\t// Moved range contains graveyard element used by split operation. Add extra move operation to the result.\n\t//\n\tif ( b.graveyardPosition ) {\n\t\tconst movesGraveyardElement = moveRange.start.isEqual( b.graveyardPosition ) || moveRange.containsPosition( b.graveyardPosition );\n\n\t\tif ( a.howMany > 1 && movesGraveyardElement && !context.aWasUndone ) {\n\t\t\tranges.push( Range._createFromPositionAndShift( b.insertionPosition, 1 ) );\n\t\t}\n\t}\n\n\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n} );\n\nsetTransformation( MoveOperation, MergeOperation, ( a, b, context ) => {\n\tconst movedRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\n\tif ( b.deletionPosition.hasSameParentAs( a.sourcePosition ) && movedRange.containsPosition( b.sourcePosition ) ) {\n\t\tif ( a.type == 'remove' && !context.forceWeakRemove ) {\n\t\t\t// Case 1:\n\t\t\t//\n\t\t\t// The element to remove got merged.\n\t\t\t//\n\t\t\t// Merge operation does support merging elements which are not siblings. So it would not be a problem\n\t\t\t// from technical point of view. However, if the element was removed, the intention of the user\n\t\t\t// deleting it was to have it all deleted. From user experience point of view, moving back the\n\t\t\t// removed nodes might be unexpected. This means that in this scenario we will reverse merging and remove the element.\n\t\t\t//\n\t\t\tif ( !context.aWasUndone ) {\n\t\t\t\tconst results = [];\n\n\t\t\t\tlet gyMoveSource = b.graveyardPosition.clone();\n\t\t\t\tlet splitNodesMoveSource = b.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\t\tif ( a.howMany > 1 ) {\n\t\t\t\t\tresults.push( new MoveOperation( a.sourcePosition, a.howMany - 1, a.targetPosition, 0 ) );\n\n\t\t\t\t\tgyMoveSource = gyMoveSource._getTransformedByMove( a.sourcePosition, a.targetPosition, a.howMany - 1 );\n\t\t\t\t\tsplitNodesMoveSource = splitNodesMoveSource._getTransformedByMove( a.sourcePosition, a.targetPosition, a.howMany - 1 );\n\t\t\t\t}\n\n\t\t\t\tconst gyMoveTarget = b.deletionPosition._getCombined( a.sourcePosition, a.targetPosition );\n\t\t\t\tconst gyMove = new MoveOperation( gyMoveSource, 1, gyMoveTarget, 0 );\n\n\t\t\t\tconst splitNodesMoveTargetPath = gyMove.getMovedRangeStart().path.slice();\n\t\t\t\tsplitNodesMoveTargetPath.push( 0 );\n\n\t\t\t\tconst splitNodesMoveTarget = new Position( gyMove.targetPosition.root, splitNodesMoveTargetPath );\n\t\t\t\tsplitNodesMoveSource = splitNodesMoveSource._getTransformedByMove( gyMoveSource, gyMoveTarget, 1 );\n\t\t\t\tconst splitNodesMove = new MoveOperation( splitNodesMoveSource, b.howMany, splitNodesMoveTarget, 0 );\n\n\t\t\t\tresults.push( gyMove );\n\t\t\t\tresults.push( splitNodesMove );\n\n\t\t\t\treturn results;\n\t\t\t}\n\t\t} else {\n\t\t\t// Case 2:\n\t\t\t//\n\t\t\t// The element to move got merged and it was the only element to move.\n\t\t\t// In this case just don't do anything, leave the node in the graveyard. Without special case\n\t\t\t// it would be a move operation that moves 0 nodes, so maybe it is better just to return no-op.\n\t\t\t//\n\t\t\tif ( a.howMany == 1 ) {\n\t\t\t\tif ( !context.bWasUndone ) {\n\t\t\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t\t\t} else {\n\t\t\t\t\ta.sourcePosition = b.graveyardPosition.clone();\n\t\t\t\t\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\t\t\treturn [ a ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst transformed = moveRange._getTransformedByMergeOperation( b );\n\n\ta.sourcePosition = transformed.start;\n\ta.howMany = transformed.end.offset - transformed.start.offset;\n\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( RenameOperation, InsertOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, MergeOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// Element to rename got merged, so it was moved to `b.graveyardPosition`.\n\t//\n\tif ( a.position.isEqual( b.deletionPosition ) ) {\n\t\ta.position = b.graveyardPosition.clone();\n\t\ta.position.stickiness = 'toNext';\n\n\t\treturn [ a ];\n\t}\n\n\ta.position = a.position._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, MoveOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByMoveOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, RenameOperation, ( a, b, context ) => {\n\tif ( a.position.isEqual( b.position ) ) {\n\t\tif ( context.aIsStrong ) {\n\t\t\ta.oldName = b.newName;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, SplitOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// The element to rename has been split. In this case, the new element should be also renamed.\n\t//\n\t// User decides to change the paragraph to a list item:\n\t// <paragraph>Foobar</paragraph>\n\t//\n\t// However, in meantime, split happens:\n\t// <paragraph>Foo</paragraph><paragraph>bar</paragraph>\n\t//\n\t// As a result, rename both elements:\n\t// <listItem>Foo</listItem><listItem>bar</listItem>\n\t//\n\tconst renamePath = a.position.path;\n\tconst splitPath = b.splitPosition.getParentPath();\n\n\tif ( compareArrays( renamePath, splitPath ) == 'same' && !b.graveyardPosition ) {\n\t\tconst extraRename = new RenameOperation( a.position.getShiftedBy( 1 ), a.oldName, a.newName, 0 );\n\n\t\treturn [ a, extraRename ];\n\t}\n\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( RootAttributeOperation, RootAttributeOperation, ( a, b, context ) => {\n\tif ( a.root === b.root && a.key === b.key ) {\n\t\tif ( !context.aIsStrong || a.newValue === b.newValue ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t} else {\n\t\t\ta.oldValue = b.newValue;\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( SplitOperation, InsertOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.position ) && a.splitPosition.offset < b.position.offset ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedByInsertOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, MergeOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Split element got merged. If two different elements were merged, clients will have different content.\n\t//\n\t// Example. Merge at `{}`, split at `[]`:\n\t// <heading>Foo</heading>{}<paragraph>B[]ar</paragraph>\n\t//\n\t// On merge side it will look like this:\n\t// <heading>FooB[]ar</heading>\n\t// <heading>FooB</heading><heading>ar</heading>\n\t//\n\t// On split side it will look like this:\n\t// <heading>Foo</heading>{}<paragraph>B</paragraph><paragraph>ar</paragraph>\n\t// <heading>FooB</heading><paragraph>ar</paragraph>\n\t//\n\t// Clearly, the second element is different for both clients.\n\t//\n\t// We could use the removed merge element from graveyard as a split element but then clients would have a different\n\t// model state (in graveyard), because the split side client would still have an element in graveyard (removed by merge).\n\t//\n\t// To overcome this, in `SplitOperation` x `MergeOperation` transformation we will add additional `SplitOperation`\n\t// in the graveyard, which will actually clone the merged-and-deleted element. Then, that cloned element will be\n\t// used for splitting. Example below.\n\t//\n\t// Original state:\n\t// <heading>Foo</heading>{}<paragraph>B[]ar</paragraph>\n\t//\n\t// Merge side client:\n\t//\n\t// After merge:\n\t// <heading>FooB[]ar</heading> graveyard: <paragraph></paragraph>\n\t//\n\t// Extra split:\n\t// <heading>FooB[]ar</heading> graveyard: <paragraph></paragraph><paragraph></paragraph>\n\t//\n\t// Use the \"cloned\" element from graveyard:\n\t// <heading>FooB</heading><paragraph>ar</paragraph> graveyard: <paragraph></paragraph>\n\t//\n\t// Split side client:\n\t//\n\t// After split:\n\t// <heading>Foo</heading>{}<paragraph>B</paragraph><paragraph>ar</paragraph>\n\t//\n\t// After merge:\n\t// <heading>FooB</heading><paragraph>ar</paragraph> graveyard: <paragraph></paragraph>\n\t//\n\t// This special case scenario only applies if the original split operation clones the split element.\n\t// If the original split operation has `graveyardPosition` set, it all doesn't have sense because split operation\n\t// knows exactly which element it should use. So there would be no original problem with different contents.\n\t//\n\t// Additionally, the special case applies only if the merge wasn't already undone.\n\t//\n\tif ( !a.graveyardPosition && !context.bWasUndone && a.splitPosition.hasSameParentAs( b.sourcePosition ) ) {\n\t\tconst splitPath = b.graveyardPosition.path.slice();\n\t\tsplitPath.push( 0 );\n\n\t\tconst splitPosition = new Position( b.graveyardPosition.root, splitPath );\n\t\tconst insertionPosition = SplitOperation.getInsertionPosition( new Position( b.graveyardPosition.root, splitPath ) );\n\n\t\tconst additionalSplit = new SplitOperation( splitPosition, 0, null, 0 );\n\t\tadditionalSplit.insertionPosition = insertionPosition;\n\n\t\ta.splitPosition = a.splitPosition._getTransformedByMergeOperation( b );\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\t\ta.graveyardPosition = additionalSplit.insertionPosition.clone();\n\t\ta.graveyardPosition.stickiness = 'toNext';\n\n\t\treturn [ additionalSplit, a ];\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.deletionPosition ) && !a.splitPosition.isAfter( b.deletionPosition ) ) {\n\t\ta.howMany--;\n\t}\n\n\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedByMergeOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\tif ( a.graveyardPosition ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, MoveOperation, ( a, b, context ) => {\n\tconst rangeToMove = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\tif ( a.graveyardPosition ) {\n\t\t// Case 1:\n\t\t//\n\t\t// Split operation graveyard node was moved. In this case move operation is stronger. Since graveyard element\n\t\t// is already moved to the correct position, we need to only move the nodes after the split position.\n\t\t// This will be done by `MoveOperation` instead of `SplitOperation`.\n\t\t//\n\t\tconst gyElementMoved = rangeToMove.start.isEqual( a.graveyardPosition ) || rangeToMove.containsPosition( a.graveyardPosition );\n\n\t\tif ( !context.bWasUndone && gyElementMoved ) {\n\t\t\tconst sourcePosition = a.splitPosition._getTransformedByMoveOperation( b );\n\n\t\t\tconst newParentPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t\t\tconst newTargetPath = newParentPosition.path.slice();\n\t\t\tnewTargetPath.push( 0 );\n\n\t\t\tconst newTargetPosition = new Position( newParentPosition.root, newTargetPath );\n\t\t\tconst moveOp = new MoveOperation( sourcePosition, a.howMany, newTargetPosition, 0 );\n\n\t\t\treturn [ moveOp ];\n\t\t}\n\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t}\n\n\t// Case 2:\n\t//\n\t// If the split position is inside the moved range, we need to shift the split position to a proper place.\n\t// The position cannot be moved together with moved range because that would result in splitting of an incorrect element.\n\t//\n\t// Characters `bc` should be moved to the second paragraph while split position is between them:\n\t// <paragraph>A[b|c]d</paragraph><paragraph>Xyz</paragraph>\n\t//\n\t// After move, new split position is incorrect:\n\t// <paragraph>Ad</paragraph><paragraph>Xb|cyz</paragraph>\n\t//\n\t// Correct split position:\n\t// <paragraph>A|d</paragraph><paragraph>Xbcyz</paragraph>\n\t//\n\t// After split:\n\t// <paragraph>A</paragraph><paragraph>d</paragraph><paragraph>Xbcyz</paragraph>\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.sourcePosition ) && rangeToMove.containsPosition( a.splitPosition ) ) {\n\t\tconst howManyRemoved = b.howMany - ( a.splitPosition.offset - b.sourcePosition.offset );\n\t\ta.howMany -= howManyRemoved;\n\n\t\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) && a.splitPosition.offset < b.targetPosition.offset ) {\n\t\t\ta.howMany += b.howMany;\n\t\t}\n\n\t\ta.splitPosition = b.sourcePosition.clone();\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 3:\n\t//\n\t// Split is at a position where nodes were moved.\n\t//\n\t// This is a scenario described in `MoveOperation` x `SplitOperation` transformation but from the\n\t// \"split operation point of view\".\n\t//\n\tconst splitAtTarget = a.splitPosition.isEqual( b.targetPosition );\n\n\tif ( splitAtTarget && ( context.baRelation == 'insertAtSource' || context.abRelation == 'splitBefore' ) ) {\n\t\ta.howMany += b.howMany;\n\t\ta.splitPosition = a.splitPosition._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\t\treturn [ a ];\n\t}\n\n\t// The default case.\n\t// Don't change `howMany` if move operation does not really move anything.\n\t//\n\tif ( !b.sourcePosition.isEqual( b.targetPosition ) ) {\n\t\tif ( a.splitPosition.hasSameParentAs( b.sourcePosition ) && a.splitPosition.offset <= b.sourcePosition.offset ) {\n\t\t\ta.howMany -= b.howMany;\n\t\t}\n\n\t\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) && a.splitPosition.offset < b.targetPosition.offset ) {\n\t\t\ta.howMany += b.howMany;\n\t\t}\n\t}\n\n\t// Change position stickiness to force a correct transformation.\n\ta.splitPosition.stickiness = 'toNone';\n\ta.splitPosition = a.splitPosition._getTransformedByMoveOperation( b );\n\ta.splitPosition.stickiness = 'toNext';\n\n\tif ( a.graveyardPosition ) {\n\t\ta.insertionPosition = a.insertionPosition._getTransformedByMoveOperation( b );\n\t} else {\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, SplitOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Split at the same position.\n\t//\n\t// If there already was a split at the same position as in `a` operation, it means that the intention\n\t// conveyed by `a` operation has already been fulfilled and `a` should not do anything (to avoid double split).\n\t//\n\t// However, there is a difference if these are new splits or splits created by undo. These have different\n\t// intentions. Also splits moving back different elements from graveyard have different intentions. They\n\t// are just different operations.\n\t//\n\t// So we cancel split operation only if it was really identical.\n\t//\n\t// Also, there is additional case, where split operations aren't identical and should not be cancelled, however the\n\t// default transformation is incorrect too.\n\t//\n\tif ( a.splitPosition.isEqual( b.splitPosition ) ) {\n\t\tif ( !a.graveyardPosition && !b.graveyardPosition ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\tif ( a.graveyardPosition && b.graveyardPosition && a.graveyardPosition.isEqual( b.graveyardPosition ) ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\t// Use context to know that the `a.splitPosition` should stay where it is.\n\t\t// This happens during undo when first a merge operation moved nodes to `a.splitPosition` and now `b` operation undoes that merge.\n\t\tif ( context.abRelation == 'splitBefore' ) {\n\t\t\t// Since split is at the same position, there are no nodes left to split.\n\t\t\ta.howMany = 0;\n\n\t\t\t// Note: there was `if ( a.graveyardPosition )` here but it was uncovered in tests and I couldn't find any scenarios for now.\n\t\t\t// That would have to be a `SplitOperation` that didn't come from undo but is transformed by operations that were undone.\n\t\t\t// It could happen if `context` is enabled in collaboration.\n\t\t\ta.graveyardPosition = a.graveyardPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Same node is using to split different elements. This happens in undo when previously same element was merged to\n\t// two different elements. This is described in `MergeOperation` x `MergeOperation` transformation.\n\t//\n\t// In this case we will follow the same logic. We will assume that `insertionPosition` is same for both\n\t// split operations. This might not always be true but in the real cases that were experienced it was. After all,\n\t// if these splits are reverses of merge operations that were merging the same element, then the `insertionPosition`\n\t// should be same for both of those splits.\n\t//\n\t// Again, we will decide which operation is stronger by checking if split happens in graveyard or in non-graveyard root.\n\t//\n\tif ( a.graveyardPosition && b.graveyardPosition && a.graveyardPosition.isEqual( b.graveyardPosition ) ) {\n\t\tconst aInGraveyard = a.splitPosition.root.rootName == '$graveyard';\n\t\tconst bInGraveyard = b.splitPosition.root.rootName == '$graveyard';\n\n\t\t// If `aIsWeak` it means that `a` points to graveyard while `b` doesn't. Don't move nodes then.\n\t\tconst aIsWeak = aInGraveyard && !bInGraveyard;\n\n\t\t// If `bIsWeak` it means that `b` points to graveyard while `a` doesn't. Force moving nodes then.\n\t\tconst bIsWeak = bInGraveyard && !aInGraveyard;\n\n\t\t// Force move if `b` is weak or neither operation is weak but `a` is stronger through `context.aIsStrong`.\n\t\tconst forceMove = bIsWeak || ( !aIsWeak && context.aIsStrong );\n\n\t\tif ( forceMove ) {\n\t\t\tconst result = [];\n\n\t\t\t// First we need to move any nodes split by `b` back to where they were.\n\t\t\t// Do it only if `b` actually moved something.\n\t\t\tif ( b.howMany ) {\n\t\t\t\tresult.push( new MoveOperation( b.moveTargetPosition, b.howMany, b.splitPosition, 0 ) );\n\t\t\t}\n\n\t\t\t// Then we need to move nodes from `a` split position to their new element.\n\t\t\t// Do it only if `a` actually should move something.\n\t\t\tif ( a.howMany ) {\n\t\t\t\tresult.push( new MoveOperation( a.splitPosition, a.howMany, a.moveTargetPosition, 0 ) );\n\t\t\t}\n\n\t\t\treturn result;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\tif ( a.graveyardPosition ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedBySplitOperation( b );\n\t}\n\n\t// Case 3:\n\t//\n\t// Position where operation `b` inserted a new node after split is the same as the operation `a` split position.\n\t// As in similar cases, there is ambiguity if the split should be before the new node (created by `b`) or after.\n\t//\n\tif ( a.splitPosition.isEqual( b.insertionPosition ) && context.abRelation == 'splitBefore' ) {\n\t\ta.howMany++;\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 4:\n\t//\n\t// This is a mirror to the case 2. above.\n\t//\n\tif ( b.splitPosition.isEqual( a.insertionPosition ) && context.baRelation == 'splitBefore' ) {\n\t\tconst newPositionPath = b.insertionPosition.path.slice();\n\t\tnewPositionPath.push( 0 );\n\n\t\tconst newPosition = new Position( b.insertionPosition.root, newPositionPath );\n\t\tconst moveOp = new MoveOperation( a.insertionPosition, 1, newPosition, 0 );\n\n\t\treturn [ a, moveOp ];\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.splitPosition ) && a.splitPosition.offset < b.splitPosition.offset ) {\n\t\ta.howMany -= b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedBySplitOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\treturn [ a ];\n} );\n\n// Checks whether `MoveOperation` `targetPosition` is inside a node from the moved range of the other `MoveOperation`.\n//\n// @private\n// @param {module:engine/model/operation/moveoperation~MoveOperation} a\n// @param {module:engine/model/operation/moveoperation~MoveOperation} b\n// @returns {Boolean}\nfunction _moveTargetIntoMovedRange( a, b ) {\n\treturn a.targetPosition._getTransformedByDeletion( b.sourcePosition, b.howMany ) === null;\n}\n\n// Helper function for `MoveOperation` x `MoveOperation` transformation. Converts given ranges and target position to\n// move operations and returns them.\n//\n// Ranges and target position will be transformed on-the-fly when generating operations.\n//\n// Given `ranges` should be in the order of how they were in the original transformed operation.\n//\n// Given `targetPosition` is the target position of the first range from `ranges`.\n//\n// @private\n// @param {Array.<module:engine/model/range~Range>} ranges\n// @param {module:engine/model/position~Position} targetPosition\n// @returns {Array.<module:engine/model/operation/moveoperation~MoveOperation>}\nfunction _makeMoveOperationsFromRanges( ranges, targetPosition ) {\n\t// At this moment we have some ranges and a target position, to which those ranges should be moved.\n\t// Order in `ranges` array is the go-to order of after transformation.\n\t//\n\t// We are almost done. We have `ranges` and `targetPosition` to make operations from.\n\t// Unfortunately, those operations may affect each other. Precisely, first operation after move\n\t// may affect source range and target position of second and third operation. Same with second\n\t// operation affecting third.\n\t//\n\t// We need to fix those source ranges and target positions once again, before converting `ranges` to operations.\n\tconst operations = [];\n\n\t// Keep in mind that nothing will be transformed if there is just one range in `ranges`.\n\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t// Create new operation out of a range and target position.\n\t\tconst range = ranges[ i ];\n\t\tconst op = new MoveOperation(\n\t\t\trange.start,\n\t\t\trange.end.offset - range.start.offset,\n\t\t\ttargetPosition,\n\t\t\t0\n\t\t);\n\n\t\toperations.push( op );\n\n\t\t// Transform other ranges by the generated operation.\n\t\tfor ( let j = i + 1; j < ranges.length; j++ ) {\n\t\t\t// All ranges in `ranges` array should be:\n\t\t\t//\n\t\t\t// * non-intersecting (these are part of original operation source range), and\n\t\t\t// * `targetPosition` does not target into them (opposite would mean that transformed operation targets \"inside itself\").\n\t\t\t//\n\t\t\t// This means that the transformation will be \"clean\" and always return one result.\n\t\t\tranges[ j ] = ranges[ j ]._getTransformedByMove( op.sourcePosition, op.targetPosition, op.howMany )[ 0 ];\n\t\t}\n\n\t\ttargetPosition = targetPosition._getTransformedByMove( op.sourcePosition, op.targetPosition, op.howMany );\n\t}\n\n\treturn operations;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/basecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { transformSets } from '@ckeditor/ckeditor5-engine/src/model/operation/transform';\n\n/**\n * Base class for undo feature commands: {@link module:undo/undocommand~UndoCommand} and {@link module:undo/redocommand~RedoCommand}.\n *\n * @protected\n * @extends module:core/command~Command\n */\nexport default class BaseCommand extends Command {\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Stack of items stored by the command. These are pairs of:\n\t\t *\n\t\t * * {@link module:engine/model/batch~Batch batch} saved by the command,\n\t\t * * {@link module:engine/model/selection~Selection selection} state at the moment of saving the batch.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array} #_stack\n\t\t */\n\t\tthis._stack = [];\n\n\t\t/**\n\t\t * Stores all batches that were created by this command.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakSet.<module:engine/model/batch~Batch>} #_createdBatches\n\t\t */\n\t\tthis._createdBatches = new WeakSet();\n\n\t\t// Refresh state, so the command is inactive right after initialization.\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this._stack.length > 0;\n\t}\n\n\t/**\n\t * Stores a batch in the command, together with the selection state of the {@link module:engine/model/document~Document document}\n\t * created by the editor which this command is registered to.\n\t *\n\t * @param {module:engine/model/batch~Batch} batch The batch to add.\n\t */\n\taddBatch( batch ) {\n\t\tconst docSelection = this.editor.model.document.selection;\n\n\t\tconst selection = {\n\t\t\tranges: docSelection.hasOwnRange ? Array.from( docSelection.getRanges() ) : [],\n\t\t\tisBackward: docSelection.isBackward\n\t\t};\n\n\t\tthis._stack.push( { batch, selection } );\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * Removes all items from the stack.\n\t */\n\tclearStack() {\n\t\tthis._stack = [];\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * Restores the {@link module:engine/model/document~Document#selection document selection} state after a batch was undone.\n\t *\n\t * @protected\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to be restored.\n\t * @param {Boolean} isBackward A flag describing whether the restored range was selected forward or backward.\n\t * @param {Array.<module:engine/model/operation/operation~Operation>} operations Operations which has been applied\n\t * since selection has been stored.\n\t */\n\t_restoreSelection( ranges, isBackward, operations ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\t// This will keep the transformed selection ranges.\n\t\tconst selectionRanges = [];\n\n\t\t// Transform all ranges from the restored selection.\n\t\tfor ( const range of ranges ) {\n\t\t\tconst transformed = transformSelectionRange( range, operations );\n\n\t\t\t// For each `range` from `ranges`, we take only one transformed range.\n\t\t\t// This is because we want to prevent situation where single-range selection\n\t\t\t// got transformed to multi-range selection. We will take the first range that\n\t\t\t// is not in the graveyard.\n\t\t\tconst newRange = transformed.find(\n\t\t\t\trange => range.start.root != document.graveyard\n\t\t\t);\n\n\t\t\t// `transformedRange` might be `undefined` if transformed range ended up in graveyard.\n\t\t\tif ( newRange ) {\n\t\t\t\tselectionRanges.push( newRange );\n\t\t\t}\n\t\t}\n\n\t\t// `selectionRanges` may be empty if all ranges ended up in graveyard. If that is the case, do not restore selection.\n\t\tif ( selectionRanges.length ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( selectionRanges, { backward: isBackward } );\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Undoes a batch by reversing that batch, transforming reversed batch and finally applying it.\n\t * This is a helper method for {@link #execute}.\n\t *\n\t * @protected\n\t * @param {module:engine/model/batch~Batch} batchToUndo The batch to be undone.\n\t * @param {module:engine/model/batch~Batch} undoingBatch The batch that will contain undoing changes.\n\t */\n\t_undo( batchToUndo, undoingBatch ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\t// All changes done by the command execution will be saved as one batch.\n\t\tthis._createdBatches.add( undoingBatch );\n\n\t\tconst operationsToUndo = batchToUndo.operations.slice().filter( operation => operation.isDocumentOperation );\n\t\toperationsToUndo.reverse();\n\n\t\t// We will process each operation from `batchToUndo`, in reverse order. If there were operations A, B and C in undone batch,\n\t\t// we need to revert them in reverse order, so first C' (reversed C), then B', then A'.\n\t\tfor ( const operationToUndo of operationsToUndo ) {\n\t\t\tconst nextBaseVersion = operationToUndo.baseVersion + 1;\n\t\t\tconst historyOperations = Array.from( document.history.getOperations( nextBaseVersion ) );\n\n\t\t\tconst transformedSets = transformSets(\n\t\t\t\t[ operationToUndo.getReversed() ],\n\t\t\t\thistoryOperations,\n\t\t\t\t{\n\t\t\t\t\tuseRelations: true,\n\t\t\t\t\tdocument: this.editor.model.document,\n\t\t\t\t\tpadWithNoOps: false,\n\t\t\t\t\tforceWeakRemove: true\n\t\t\t\t}\n\t\t\t);\n\n\t\t\tconst reversedOperations = transformedSets.operationsA;\n\n\t\t\t// After reversed operation has been transformed by all history operations, apply it.\n\t\t\tfor ( const operation of reversedOperations ) {\n\t\t\t\t// Before applying, add the operation to the `undoingBatch`.\n\t\t\t\tundoingBatch.addOperation( operation );\n\t\t\t\tmodel.applyOperation( operation );\n\n\t\t\t\tdocument.history.setOperationAsUndone( operationToUndo, operation );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Transforms given range `range` by given `operations`.\n// Returns an array containing one or more ranges, which are result of the transformation.\nfunction transformSelectionRange( range, operations ) {\n\tconst transformed = range.getTransformedByOperations( operations );\n\n\t// After `range` got transformed, we have an array of ranges. Some of those\n\t// ranges may be \"touching\" -- they can be next to each other and could be merged.\n\t// First, we have to sort those ranges to assure that they are in order.\n\ttransformed.sort( ( a, b ) => a.start.isBefore( b.start ) ? -1 : 1 );\n\n\t// Then, we check if two consecutive ranges are touching.\n\tfor ( let i = 1; i < transformed.length; i++ ) {\n\t\tconst a = transformed[ i - 1 ];\n\t\tconst b = transformed[ i ];\n\n\t\tif ( a.end.isTouching( b.start ) ) {\n\t\t\t// And join them together if they are.\n\t\t\ta.end = b.end;\n\t\t\ttransformed.splice( i, 1 );\n\t\t\ti--;\n\t\t}\n\t}\n\n\treturn transformed;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undocommand\n */\n\nimport BaseCommand from './basecommand';\n\n/**\n * The undo command stores {@link module:engine/model/batch~Batch batches} applied to the\n * {@link module:engine/model/document~Document document} and is able to undo a batch by reversing it and transforming by\n * batches from {@link module:engine/model/document~Document#history history} that happened after the reversed batch.\n *\n * The undo command also takes care of restoring the {@link module:engine/model/document~Document#selection document selection}.\n *\n * @extends module:undo/basecommand~BaseCommand\n */\nexport default class UndoCommand extends BaseCommand {\n\t/**\n\t * Executes the command. This method reverts a {@link module:engine/model/batch~Batch batch} added to the command's stack, transforms\n\t * and applies the reverted version on the {@link module:engine/model/document~Document document} and removes the batch from the stack.\n\t * Then, it restores the {@link module:engine/model/document~Document#selection document selection}.\n\t *\n\t * @fires execute\n\t * @fires revert\n\t * @param {module:engine/model/batch~Batch} [batch] A batch that should be undone. If not set, the last added batch will be undone.\n\t */\n\texecute( batch = null ) {\n\t\t// If batch is not given, set `batchIndex` to the last index in command stack.\n\t\tconst batchIndex = batch ? this._stack.findIndex( a => a.batch == batch ) : this._stack.length - 1;\n\n\t\tconst item = this._stack.splice( batchIndex, 1 )[ 0 ];\n\t\tconst undoingBatch = this.editor.model.createBatch( 'transparent' );\n\n\t\t// All changes has to be done in one `enqueueChange` callback so other listeners will not\n\t\t// step between consecutive operations, or won't do changes to the document before selection is properly restored.\n\t\tthis.editor.model.enqueueChange( undoingBatch, () => {\n\t\t\tthis._undo( item.batch, undoingBatch );\n\n\t\t\tconst operations = this.editor.model.document.history.getOperations( item.batch.baseVersion );\n\t\t\tthis._restoreSelection( item.selection.ranges, item.selection.isBackward, operations );\n\n\t\t\tthis.fire( 'revert', item.batch, undoingBatch );\n\t\t} );\n\n\t\tthis.refresh();\n\t}\n}\n\n/**\n * Fired when execution of the command reverts some batch.\n *\n * @event revert\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/redocommand\n */\n\nimport BaseCommand from './basecommand';\n\n/**\n * The redo command stores {@link module:engine/model/batch~Batch batches} that were used to undo a batch by\n * {@link module:undo/undocommand~UndoCommand}. It is able to redo a previously undone batch by reversing the undoing\n * batches created by `UndoCommand`. The reversed batch is transformed by all the batches from\n * {@link module:engine/model/document~Document#history history} that happened after the reversed undo batch.\n *\n * The redo command also takes care of restoring the {@link module:engine/model/document~Document#selection document selection}.\n *\n * @extends module:undo/basecommand~BaseCommand\n */\nexport default class RedoCommand extends BaseCommand {\n\t/**\n\t * Executes the command. This method reverts the last {@link module:engine/model/batch~Batch batch} added to\n\t * the command's stack, applies the reverted and transformed version on the\n\t * {@link module:engine/model/document~Document document} and removes the batch from the stack.\n\t * Then, it restores the {@link module:engine/model/document~Document#selection document selection}.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst item = this._stack.pop();\n\t\tconst redoingBatch = this.editor.model.createBatch( 'transparent' );\n\n\t\t// All changes have to be done in one `enqueueChange` callback so other listeners will not step between consecutive\n\t\t// operations, or won't do changes to the document before selection is properly restored.\n\t\tthis.editor.model.enqueueChange( redoingBatch, () => {\n\t\t\tconst lastOperation = item.batch.operations[ item.batch.operations.length - 1 ];\n\t\t\tconst nextBaseVersion = lastOperation.baseVersion + 1;\n\t\t\tconst operations = this.editor.model.document.history.getOperations( nextBaseVersion );\n\n\t\t\tthis._restoreSelection( item.selection.ranges, item.selection.isBackward, operations );\n\t\t\tthis._undo( item.batch, redoingBatch );\n\t\t} );\n\n\t\tthis.refresh();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undoediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport UndoCommand from './undocommand';\nimport RedoCommand from './redocommand';\n\n/**\n * The undo engine feature.\n *\n * It introduces the `'undo'` and `'redo'` commands to the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class UndoEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'UndoEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The command that manages undo {@link module:engine/model/batch~Batch batches} stack (history).\n\t\t * Created and registered during the {@link #init feature initialization}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:undo/undocommand~UndoCommand} #_undoCommand\n\t\t */\n\n\t\t/**\n\t\t * The command that manages redo {@link module:engine/model/batch~Batch batches} stack (history).\n\t\t * Created and registered during the {@link #init feature initialization}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:undo/undocommand~UndoCommand} #_redoCommand\n\t\t */\n\n\t\t/**\n\t\t * Keeps track of which batches were registered in undo.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.<module:engine/model/batch~Batch>}\n\t\t */\n\t\tthis._batchRegistry = new WeakSet();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Create commands.\n\t\tthis._undoCommand = new UndoCommand( editor );\n\t\tthis._redoCommand = new RedoCommand( editor );\n\n\t\t// Register command to the editor.\n\t\teditor.commands.add( 'undo', this._undoCommand );\n\t\teditor.commands.add( 'redo', this._redoCommand );\n\n\t\tthis.listenTo( editor.model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\t// Do not register batch if the operation is not a document operation.\n\t\t\t// This prevents from creating empty undo steps, where all operations where non-document operations.\n\t\t\t// Non-document operations creates and alters content in detached tree fragments (for example, document fragments).\n\t\t\t// Most of time this is preparing data before it is inserted into actual tree (for example during copy & paste).\n\t\t\t// Such operations should not be reversed.\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst batch = operation.batch;\n\n\t\t\tconst isRedoBatch = this._redoCommand._createdBatches.has( batch );\n\t\t\tconst isUndoBatch = this._undoCommand._createdBatches.has( batch );\n\t\t\tconst isRegisteredBatch = this._batchRegistry.has( batch );\n\n\t\t\t// If changes are not a part of a batch or this is not a new batch, omit those changes.\n\t\t\tif ( isRegisteredBatch || ( batch.type == 'transparent' && !isRedoBatch && !isUndoBatch ) ) {\n\t\t\t\treturn;\n\t\t\t} else {\n\t\t\t\tif ( isRedoBatch ) {\n\t\t\t\t\t// If this batch comes from `redoCommand`, add it to `undoCommand` stack.\n\t\t\t\t\tthis._undoCommand.addBatch( batch );\n\t\t\t\t} else if ( !isUndoBatch ) {\n\t\t\t\t\t// A default batch - these are new changes in the document, not introduced by undo feature.\n\t\t\t\t\t// Add them to `undoCommand` stack and clear `redoCommand` stack.\n\t\t\t\t\tthis._undoCommand.addBatch( batch );\n\t\t\t\t\tthis._redoCommand.clearStack();\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add the batch to the registry so it will not be processed again.\n\t\t\tthis._batchRegistry.add( batch );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( this._undoCommand, 'revert', ( evt, undoneBatch, undoingBatch ) => {\n\t\t\tthis._redoCommand.addBatch( undoingBatch );\n\t\t} );\n\n\t\teditor.keystrokes.set( 'CTRL+Z', 'undo' );\n\t\teditor.keystrokes.set( 'CTRL+Y', 'redo' );\n\t\teditor.keystrokes.set( 'CTRL+SHIFT+Z', 'redo' );\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M5.042 9.367l2.189 1.837a.75.75 0 0 1-.965 1.149l-3.788-3.18a.747.747 0 0 1-.21-.284.75.75 0 0 1 .17-.945L6.23 4.762a.75.75 0 1 1 .964 1.15L4.863 7.866h8.917A.75.75 0 0 1 14 7.9a4 4 0 1 1-1.477 7.718l.344-1.489a2.5 2.5 0 1 0 1.094-4.73l.008-.032H5.042z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module undo/undoui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport undoIcon from '../theme/icons/undo.svg';\nimport redoIcon from '../theme/icons/redo.svg';\n/**\n * The undo UI feature. It introduces the `'undo'` and `'redo'` buttons to the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class UndoUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const locale = editor.locale;\n const t = editor.t;\n const localizedUndoIcon = locale.uiLanguageDirection == 'ltr' ? undoIcon : redoIcon;\n const localizedRedoIcon = locale.uiLanguageDirection == 'ltr' ? redoIcon : undoIcon;\n this._addButton('undo', t('bs'), 'CTRL+Z', localizedUndoIcon);\n this._addButton('redo', t('bt'), 'CTRL+Y', localizedRedoIcon);\n }\n /**\n\t * Creates a button for the specified command.\n\t *\n\t * @private\n\t * @param {String} name Command name.\n\t * @param {String} label Button label.\n\t * @param {String} keystroke Command keystroke.\n\t * @param {String} Icon Source of the icon.\n\t */\n _addButton(name, label, keystroke, Icon) {\n const editor = this.editor;\n editor.ui.componentFactory.add(name, locale => {\n const command = editor.commands.get(name);\n const view = new ButtonView(locale);\n view.set({\n label,\n icon: Icon,\n keystroke,\n tooltip: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n this.listenTo(view, 'execute', () => editor.execute(name));\n return view;\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undo\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport UndoEditing from './undoediting';\nimport UndoUI from './undoui';\n\n/**\n * The undo feature.\n *\n * This is a \"glue\" plugin which loads the {@link module:undo/undoediting~UndoEditing undo editing feature}\n * and {@link module:undo/undoui~UndoUI undo UI feature}.\n *\n * Below is the explanation of the undo mechanism working together with {@link module:engine/model/history~History History}:\n *\n * Whenever a {@link module:engine/model/operation/operation~Operation operation} is applied to the\n * {@link module:engine/model/document~Document document}, it is saved to `History` as is.\n * The {@link module:engine/model/batch~Batch batch} that owns that operation is also saved, in\n * {@link module:undo/undocommand~UndoCommand}, together with the selection that was present in the document before the\n * operation was applied. A batch is saved instead of the operation because changes are undone batch-by-batch, not operation-by-operation\n * and a batch is seen as one undo step.\n *\n * After some changes happen to the document, the `History` and `UndoCommand` stack can be represented as follows:\n *\n *\t\t History Undo stack\n *\t\t============== ==================================\n *\t\t[operation A1] [batch A]\n *\t\t[operation B1] [batch B]\n *\t\t[operation B2] [batch C]\n *\t\t[operation C1]\n *\t\t[operation C2]\n *\t\t[operation B3]\n *\t\t[operation C3]\n *\n * Where operations starting with the same letter are from same batch.\n *\n * Undoing a batch means that a set of operations which will reverse the effects of that batch needs to be generated.\n * For example, if a batch added several letters, undoing the batch should remove them. It is important to apply undoing\n * operations in the reversed order, so if a batch has operation `X`, `Y`, `Z`, reversed operations `Zr`, `Yr` and `Xr`\n * need to be applied. Otherwise reversed operation `Xr` would operate on a wrong document state, because operation `X`\n * does not know that operations `Y` and `Z` happened.\n *\n * After operations from an undone batch got {@link module:engine/model/operation/operation~Operation#getReversed reversed},\n * one needs to make sure if they are ready to be applied. In the scenario above, operation `C3` is the last operation and `C3r`\n * bases on up-to-date document state, so it can be applied to the document.\n *\n *\t\t History Undo stack\n *\t\t================= ==================================\n *\t\t[ operation A1 ] [ batch A ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ] [ processing undoing batch C ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\n * Next is operation `C2`, reversed to `C2r`. `C2r` bases on `C2`, so it bases on the wrong document state. It needs to be\n * transformed by operations from history that happened after it, so it \"knows\" about them. Let us assume that `C2' = C2r * B3 * C3 * C3r`,\n * where `*` means \"transformed by\". Rest of operations from that batch are processed in the same fashion.\n *\n *\t\t History Undo stack Redo stack\n *\t\t================= ================================== ==================================\n *\t\t[ operation A1 ] [ batch A ] [ batch Cr ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\t\t[ operation C2' ]\n *\t\t[ operation C1' ]\n *\n * Selective undo works on the same basis, however, instead of undoing the last batch in the undo stack, any batch can be undone.\n * The same algorithm applies: operations from a batch (i.e. `A1`) are reversed and then transformed by operations stored in history.\n *\n * Redo also is very similar to undo. It has its own stack that is filled with undoing (reversed batches). Operations from\n * batch that is re-done are reversed-back, transformed in proper order and applied to the document.\n *\n *\t\t History Undo stack Redo stack\n *\t\t================= ================================== ==================================\n *\t\t[ operation A1 ] [ batch A ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ] [ batch Crr ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\t\t[ operation C2' ]\n *\t\t[ operation C1' ]\n *\t\t[ operation C1'r]\n *\t\t[ operation C2'r]\n *\t\t[ operation C3rr]\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Undo extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ UndoEditing, UndoUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Undo';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/pendingactions\n */\n\nimport Plugin from './plugin';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The list of pending editor actions.\n *\n * This plugin should be used to synchronise plugins that execute long-lasting actions\n * (e.g. file upload) with the editor integration. It gives the developer who integrates the editor\n * an easy way to check if there are any actions pending whenever such information is needed.\n * All plugins that register a pending action also provide a message about the action that is ongoing\n * which can be displayed to the user. This lets them decide if they want to interrupt the action or wait.\n *\n * Adding and updating a pending action:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n * \t\tconst action = pendingActions.add( 'Upload in progress: 0%.' );\n *\n *\t\t// You can update the message:\n * \t\taction.message = 'Upload in progress: 10%.';\n *\n * Removing a pending action:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n * \t\tconst action = pendingActions.add( 'Unsaved changes.' );\n *\n * \t\tpendingActions.remove( action );\n *\n * Getting pending actions:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n *\n * \t\tconst action1 = pendingActions.add( 'Action 1' );\n * \t\tconst action2 = pendingActions.add( 'Action 2' );\n *\n * \t\tpendingActions.first; // Returns action1\n * \t\tArray.from( pendingActions ); // Returns [ action1, action2 ]\n *\n * This plugin is used by features like {@link module:upload/filerepository~FileRepository} to register their ongoing actions\n * and by features like {@link module:autosave/autosave~Autosave} to detect whether there are any ongoing actions.\n * Read more about saving the data in the {@glink builds/guides/integration/saving-data Saving and getting data} guide.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class PendingActions extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'PendingActions';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\t/**\n\t\t * Defines whether there is any registered pending action.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #hasAny\n\t\t */\n\t\tthis.set( 'hasAny', false );\n\n\t\t/**\n\t\t * A list of pending actions.\n\t\t *\n\t\t * @private\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis._actions = new Collection( { idProperty: '_id' } );\n\t\tthis._actions.delegate( 'add', 'remove' ).to( this );\n\t}\n\n\t/**\n\t * Adds an action to the list of pending actions.\n\t *\n\t * This method returns an action object with an observable message property.\n\t * The action object can be later used in the {@link #remove} method. It also allows you to change the message.\n\t *\n\t * @param {String} message The action message.\n\t * @returns {Object} An observable object that represents a pending action.\n\t */\n\tadd( message ) {\n\t\tif ( typeof message !== 'string' ) {\n\t\t\t/**\n\t\t\t * The message must be a string.\n\t\t\t *\n\t\t\t * @error pendingactions-add-invalid-message\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'pendingactions-add-invalid-message: The message must be a string.', this );\n\t\t}\n\n\t\tconst action = Object.create( ObservableMixin );\n\n\t\taction.set( 'message', message );\n\t\tthis._actions.add( action );\n\t\tthis.hasAny = true;\n\n\t\treturn action;\n\t}\n\n\t/**\n\t * Removes an action from the list of pending actions.\n\t *\n\t * @param {Object} action An action object.\n\t */\n\tremove( action ) {\n\t\tthis._actions.remove( action );\n\t\tthis.hasAny = !!this._actions.length;\n\t}\n\n\t/**\n\t * Returns the first action from the list or null when list is empty\n\t *\n\t * returns {Object|null} The pending action object.\n\t */\n\tget first() {\n\t\treturn this._actions.get( 0 );\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._actions[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Fired when an action is added to the list.\n\t *\n\t * @event add\n\t * @param {Object} action The added action.\n\t */\n\n\t/**\n\t * Fired when an action is removed from the list.\n\t *\n\t * @event remove\n\t * @param {Object} action The removed action.\n\t */\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module upload/filereader\n */\n\n/* globals window */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Wrapper over the native `FileReader`.\n */\nexport default class FileReader {\n\t/**\n\t * Creates an instance of the FileReader.\n\t */\n\tconstructor() {\n\t\tconst reader = new window.FileReader();\n\n\t\t/**\n\t\t * Instance of native FileReader.\n\t\t *\n\t\t * @private\n\t\t * @member {FileReader} #_reader\n\t\t */\n\t\tthis._reader = reader;\n\n\t\tthis._data = undefined;\n\n\t\t/**\n\t\t * Number of bytes loaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #loaded\n\t\t */\n\t\tthis.set( 'loaded', 0 );\n\n\t\treader.onprogress = evt => {\n\t\t\tthis.loaded = evt.loaded;\n\t\t};\n\t}\n\n\t/**\n\t * Returns error that occurred during file reading.\n\t *\n\t * @returns {Error}\n\t */\n\tget error() {\n\t\treturn this._reader.error;\n\t}\n\n\t/**\n\t * Holds the data of an already loaded file. The file must be first loaded\n\t * by using {@link module:upload/filereader~FileReader#read `read()`}.\n\t *\n\t * @type {File|undefined}\n\t */\n\tget data() {\n\t\treturn this._data;\n\t}\n\n\t/**\n\t * Reads the provided file.\n\t *\n\t * @param {File} file Native File object.\n\t * @returns {Promise.<String>} Returns a promise that will be resolved with file's content.\n\t * The promise will be rejected in case of an error or when the reading process is aborted.\n\t */\n\tread( file ) {\n\t\tconst reader = this._reader;\n\t\tthis.total = file.size;\n\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\treader.onload = () => {\n\t\t\t\tconst result = reader.result;\n\n\t\t\t\tthis._data = result;\n\n\t\t\t\tresolve( result );\n\t\t\t};\n\n\t\t\treader.onerror = () => {\n\t\t\t\treject( 'error' );\n\t\t\t};\n\n\t\t\treader.onabort = () => {\n\t\t\t\treject( 'aborted' );\n\t\t\t};\n\n\t\t\tthis._reader.readAsDataURL( file );\n\t\t} );\n\t}\n\n\t/**\n\t * Aborts file reader.\n\t */\n\tabort() {\n\t\tthis._reader.abort();\n\t}\n}\n\nmix( FileReader, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module upload/filerepository\n */\n/* globals console */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport PendingActions from '@ckeditor/ckeditor5-core/src/pendingactions';\nimport CKEditorError, { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport FileReader from './filereader.js';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid.js';\n/**\n * File repository plugin. A central point for managing file upload.\n *\n * To use it, first you need an upload adapter. Upload adapter's job is to handle communication with the server\n * (sending the file and handling server's response). You can use one of the existing plugins introducing upload adapters\n * (e.g. {@link module:easy-image/cloudservicesuploadadapter~CloudServicesUploadAdapter} or\n * {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter}) or write your own one – see\n * the {@glink framework/guides/deep-dive/upload-adapter \"Custom image upload adapter\" deep dive guide}.\n *\n * Then, you can use {@link module:upload/filerepository~FileRepository#createLoader `createLoader()`} and the returned\n * {@link module:upload/filerepository~FileLoader} instance to load and upload files.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class FileRepository extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'FileRepository';\n }\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [PendingActions];\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n /**\n\t\t * Collection of loaders associated with this repository.\n\t\t *\n\t\t * @member {module:utils/collection~Collection} #loaders\n\t\t */\n this.loaders = new Collection();\n // Keeps upload in a sync with pending actions.\n this.loaders.on('add', () => this._updatePendingAction());\n this.loaders.on('remove', () => this._updatePendingAction());\n /**\n\t\t * Loaders mappings used to retrieve loaders references.\n\t\t *\n\t\t * @private\n\t\t * @member {Map<File|Promise, FileLoader>} #_loadersMap\n\t\t */\n this._loadersMap = new Map();\n /**\n\t\t * Reference to a pending action registered in a {@link module:core/pendingactions~PendingActions} plugin\n\t\t * while upload is in progress. When there is no upload then value is `null`.\n\t\t *\n\t\t * @private\n\t\t * @member {Object} #_pendingAction\n\t\t */\n this._pendingAction = null;\n /**\n\t\t * A factory function which should be defined before using `FileRepository`.\n\t\t *\n\t\t * It should return a new instance of {@link module:upload/filerepository~UploadAdapter} that will be used to upload files.\n\t\t * {@link module:upload/filerepository~FileLoader} instance associated with the adapter\n\t\t * will be passed to that function.\n\t\t *\n\t\t * For more information and example see {@link module:upload/filerepository~UploadAdapter}.\n\t\t *\n\t\t * @member {Function} #createUploadAdapter\n\t\t */\n /**\n\t\t * Number of bytes uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploaded\n\t\t */\n this.set('uploaded', 0);\n /**\n\t\t * Number of total bytes to upload.\n\t\t *\n\t\t * It might be different than the file size because of headers and additional data.\n\t\t * It contains `null` if value is not available yet, so it's better to use {@link #uploadedPercent} to monitor\n\t\t * the progress.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number|null} #uploadTotal\n\t\t */\n this.set('uploadTotal', null);\n /**\n\t\t * Upload progress in percents.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploadedPercent\n\t\t */\n this.bind('uploadedPercent').to(this, 'uploaded', this, 'uploadTotal', (uploaded, total) => {\n return total ? uploaded / total * 100 : 0;\n });\n }\n /**\n\t * Returns the loader associated with specified file or promise.\n\t *\n\t * To get loader by id use `fileRepository.loaders.get( id )`.\n\t *\n\t * @param {File|Promise.<File>} fileOrPromise Native file or promise handle.\n\t * @returns {module:upload/filerepository~FileLoader|null}\n\t */\n getLoader(fileOrPromise) {\n return this._loadersMap.get(fileOrPromise) || null;\n }\n /**\n\t * Creates a loader instance for the given file.\n\t *\n\t * Requires {@link #createUploadAdapter} factory to be defined.\n\t *\n\t * @param {File|Promise.<File>} fileOrPromise Native File object or native Promise object which resolves to a File.\n\t * @returns {module:upload/filerepository~FileLoader|null}\n\t */\n createLoader(fileOrPromise) {\n if (!this.createUploadAdapter) {\n /**\n\t\t\t * You need to enable an upload adapter in order to be able to upload files.\n\t\t\t *\n\t\t\t * This warning shows up when {@link module:upload/filerepository~FileRepository} is being used\n\t\t\t * without {@link #createUploadAdapter definining an upload adapter}.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the {@glink builds/index CKEditor 5 Builds}**\n\t\t\t * it means that you did not configure any of the upload adapters available by default in those builds.\n\t\t\t *\n\t\t\t * See the {@glink features/image-upload/image-upload comprehensive \"Image upload overview\"} to learn which upload\n\t\t\t * adapters are available in the builds and how to configure them.\n\t\t\t *\n\t\t\t * **If you see this warning when using a custom build** there is a chance that you enabled\n\t\t\t * a feature like {@link module:image/imageupload~ImageUpload},\n\t\t\t * or {@link module:image/imageupload/imageuploadui~ImageUploadUI} but you did not enable any upload adapter.\n\t\t\t * You can choose one of the existing upload adapters listed in the\n\t\t\t * {@glink features/image-upload/image-upload \"Image upload overview\"}.\n\t\t\t *\n\t\t\t * You can also implement your {@glink framework/guides/deep-dive/upload-adapter own image upload adapter}.\n\t\t\t *\n\t\t\t * @error filerepository-no-upload-adapter\n\t\t\t */\n console.warn(attachLinkToDocumentation('filerepository-no-upload-adapter: Upload adapter is not defined.'));\n return null;\n }\n const loader = new FileLoader(Promise.resolve(fileOrPromise), this.createUploadAdapter);\n this.loaders.add(loader);\n this._loadersMap.set(fileOrPromise, loader);\n // Store also file => loader mapping so loader can be retrieved by file instance returned upon Promise resolution.\n if (fileOrPromise instanceof Promise) {\n loader.file.then(file => {\n this._loadersMap.set(file, loader);\n }) // Every then() must have a catch().\n // File loader state (and rejections) are handled in read() and upload().\n // Also, see the \"does not swallow the file promise rejection\" test.\n.catch(() => {\n });\n }\n loader.on('change:uploaded', () => {\n let aggregatedUploaded = 0;\n for (const loader of this.loaders) {\n aggregatedUploaded += loader.uploaded;\n }\n this.uploaded = aggregatedUploaded;\n });\n loader.on('change:uploadTotal', () => {\n let aggregatedTotal = 0;\n for (const loader of this.loaders) {\n if (loader.uploadTotal) {\n aggregatedTotal += loader.uploadTotal;\n }\n }\n this.uploadTotal = aggregatedTotal;\n });\n return loader;\n }\n /**\n\t * Destroys the given loader.\n\t *\n\t * @param {File|Promise|module:upload/filerepository~FileLoader} fileOrPromiseOrLoader File or Promise associated\n\t * with that loader or loader itself.\n\t */\n destroyLoader(fileOrPromiseOrLoader) {\n const loader = fileOrPromiseOrLoader instanceof FileLoader ? fileOrPromiseOrLoader : this.getLoader(fileOrPromiseOrLoader);\n loader._destroy();\n this.loaders.remove(loader);\n this._loadersMap.forEach((value, key) => {\n if (value === loader) {\n this._loadersMap.delete(key);\n }\n });\n }\n /**\n\t * Registers or deregisters pending action bound with upload progress.\n\t *\n\t * @private\n\t */\n _updatePendingAction() {\n const pendingActions = this.editor.plugins.get(PendingActions);\n if (this.loaders.length) {\n if (!this._pendingAction) {\n const t = this.editor.t;\n const getMessage = value => `${ t('ay') } ${ parseInt(value) }%.`;\n this._pendingAction = pendingActions.add(getMessage(this.uploadedPercent));\n this._pendingAction.bind('message').to(this, 'uploadedPercent', getMessage);\n }\n } else {\n pendingActions.remove(this._pendingAction);\n this._pendingAction = null;\n }\n }\n}\nmix(FileRepository, ObservableMixin);\n/**\n * File loader class.\n *\n * It is used to control the process of reading the file and uploading it using the specified upload adapter.\n */\nclass FileLoader {\n /**\n\t * Creates a new instance of `FileLoader`.\n\t *\n\t * @param {Promise.<File>} filePromise A promise which resolves to a file instance.\n\t * @param {Function} uploadAdapterCreator The function which returns {@link module:upload/filerepository~UploadAdapter} instance.\n\t */\n constructor(filePromise, uploadAdapterCreator) {\n /**\n\t\t * Unique id of FileLoader instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n this.id = uid();\n /**\n\t\t * Additional wrapper over the initial file promise passed to this loader.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/filerepository~FilePromiseWrapper}\n\t\t */\n this._filePromiseWrapper = this._createFilePromiseWrapper(filePromise);\n /**\n\t\t * Adapter instance associated with this file loader.\n\t\t *\n\t\t * @private\n\t\t * @member {module:upload/filerepository~UploadAdapter}\n\t\t */\n this._adapter = uploadAdapterCreator(this);\n /**\n\t\t * FileReader used by FileLoader.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/filereader~FileReader}\n\t\t */\n this._reader = new FileReader();\n /**\n\t\t * Current status of FileLoader. It can be one of the following:\n\t\t *\n\t\t * * 'idle',\n\t\t * * 'reading',\n\t\t * * 'uploading',\n\t\t * * 'aborted',\n\t\t * * 'error'.\n\t\t *\n\t\t * When reading status can change in a following way:\n\t\t *\n\t\t * `idle` -> `reading` -> `idle`\n\t\t * `idle` -> `reading -> `aborted`\n\t\t * `idle` -> `reading -> `error`\n\t\t *\n\t\t * When uploading status can change in a following way:\n\t\t *\n\t\t * `idle` -> `uploading` -> `idle`\n\t\t * `idle` -> `uploading` -> `aborted`\n\t\t * `idle` -> `uploading` -> `error`\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {String} #status\n\t\t */\n this.set('status', 'idle');\n /**\n\t\t * Number of bytes uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploaded\n\t\t */\n this.set('uploaded', 0);\n /**\n\t\t * Number of total bytes to upload.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number|null} #uploadTotal\n\t\t */\n this.set('uploadTotal', null);\n /**\n\t\t * Upload progress in percents.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploadedPercent\n\t\t */\n this.bind('uploadedPercent').to(this, 'uploaded', this, 'uploadTotal', (uploaded, total) => {\n return total ? uploaded / total * 100 : 0;\n });\n /**\n\t\t * Response of the upload.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Object|null} #uploadResponse\n\t\t */\n this.set('uploadResponse', null);\n }\n /**\n\t * A `Promise` which resolves to a `File` instance associated with this file loader.\n\t *\n\t * @type {Promise.<File|null>}\n\t */\n get file() {\n if (!this._filePromiseWrapper) {\n // Loader was destroyed, return promise which resolves to null.\n return Promise.resolve(null);\n } else {\n // The `this._filePromiseWrapper.promise` is chained and not simply returned to handle a case when:\n //\n //\t\t* The `loader.file.then( ... )` is called by external code (returned promise is pending).\n //\t\t* Then `loader._destroy()` is called (call is synchronous) which destroys the `loader`.\n //\t\t* Promise returned by the first `loader.file.then( ... )` call is resolved.\n //\n // Returning `this._filePromiseWrapper.promise` will still resolve to a `File` instance so there\n // is an additional check needed in the chain to see if `loader` was destroyed in the meantime.\n return this._filePromiseWrapper.promise.then(file => this._filePromiseWrapper ? file : null);\n }\n }\n /**\n\t * Returns the file data. To read its data, you need for first load the file\n\t * by using the {@link module:upload/filerepository~FileLoader#read `read()`} method.\n\t *\n\t * @type {File|undefined}\n\t */\n get data() {\n return this._reader.data;\n }\n /**\n\t * Reads file using {@link module:upload/filereader~FileReader}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `filerepository-read-wrong-status` when status\n\t * is different than `idle`.\n\t *\n\t * Example usage:\n\t *\n\t *\tfileLoader.read()\n\t *\t\t.then( data => { ... } )\n\t *\t\t.catch( err => {\n\t *\t\t\tif ( err === 'aborted' ) {\n\t *\t\t\t\tconsole.log( 'Reading aborted.' );\n\t *\t\t\t} else {\n\t *\t\t\t\tconsole.log( 'Reading error.', err );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @returns {Promise.<String>} Returns promise that will be resolved with read data. Promise will be rejected if error\n\t * occurs or if read process is aborted.\n\t */\n read() {\n if (this.status != 'idle') {\n throw new CKEditorError('filerepository-read-wrong-status: You cannot call read if the status is different than idle.', this);\n }\n this.status = 'reading';\n return this.file.then(file => this._reader.read(file)).then(data => {\n // Edge case: reader was aborted after file was read - double check for proper status.\n if (this.status !== 'reading') {\n throw this.status;\n }\n this.status = 'idle';\n return data;\n }).catch(err => {\n if (err === 'aborted') {\n this.status = 'aborted';\n throw 'aborted';\n }\n this.status = 'error';\n throw this._reader.error ? this._reader.error : err;\n });\n }\n /**\n\t * Reads file using the provided {@link module:upload/filerepository~UploadAdapter}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `filerepository-upload-wrong-status` when status\n\t * is different than `idle`.\n\t * Example usage:\n\t *\n\t *\tfileLoader.upload()\n\t *\t\t.then( data => { ... } )\n\t *\t\t.catch( e => {\n\t *\t\t\tif ( e === 'aborted' ) {\n\t *\t\t\t\tconsole.log( 'Uploading aborted.' );\n\t *\t\t\t} else {\n\t *\t\t\t\tconsole.log( 'Uploading error.', e );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @returns {Promise.<Object>} Returns promise that will be resolved with response data. Promise will be rejected if error\n\t * occurs or if read process is aborted.\n\t */\n upload() {\n if (this.status != 'idle') {\n throw new CKEditorError('filerepository-upload-wrong-status: You cannot call upload if the status is different than idle.', this);\n }\n this.status = 'uploading';\n return this.file.then(() => this._adapter.upload()).then(data => {\n this.uploadResponse = data;\n this.status = 'idle';\n return data;\n }).catch(err => {\n if (this.status === 'aborted') {\n throw 'aborted';\n }\n this.status = 'error';\n throw err;\n });\n }\n /**\n\t * Aborts loading process.\n\t */\n abort() {\n const status = this.status;\n this.status = 'aborted';\n if (!this._filePromiseWrapper.isFulfilled) {\n // Edge case: file loader is aborted before read() is called\n // so it might happen that no one handled the rejection of this promise.\n // See https://github.com/ckeditor/ckeditor5-upload/pull/100\n this._filePromiseWrapper.promise.catch(() => {\n });\n this._filePromiseWrapper.rejecter('aborted');\n } else if (status == 'reading') {\n this._reader.abort();\n } else if (status == 'uploading' && this._adapter.abort) {\n this._adapter.abort();\n }\n this._destroy();\n }\n /**\n\t * Performs cleanup.\n\t *\n\t * @private\n\t */\n _destroy() {\n this._filePromiseWrapper = undefined;\n this._reader = undefined;\n this._adapter = undefined;\n this.uploadResponse = undefined;\n }\n /**\n\t * Wraps a given file promise into another promise giving additional\n\t * control (resolving, rejecting, checking if fulfilled) over it.\n\t *\n\t * @private\n\t * @param filePromise The initial file promise to be wrapped.\n\t * @returns {module:upload/filerepository~FilePromiseWrapper}\n\t */\n _createFilePromiseWrapper(filePromise) {\n const wrapper = {};\n wrapper.promise = new Promise((resolve, reject) => {\n wrapper.rejecter = reject;\n wrapper.isFulfilled = false;\n filePromise.then(file => {\n wrapper.isFulfilled = true;\n resolve(file);\n }).catch(err => {\n wrapper.isFulfilled = true;\n reject(err);\n });\n });\n return wrapper;\n }\n}\nmix(FileLoader, ObservableMixin); /**\n * Upload adapter interface used by the {@link module:upload/filerepository~FileRepository file repository}\n * to handle file upload. An upload adapter is a bridge between the editor and server that handles file uploads.\n * It should contain a logic necessary to initiate an upload process and monitor its progress.\n *\n * Learn how to develop your own upload adapter for CKEditor 5 in the\n * {@glink framework/guides/deep-dive/upload-adapter \"Custom upload adapter\" guide}.\n *\n * @interface UploadAdapter\n */\n /**\n * Executes the upload process.\n * This method should return a promise that will resolve when data will be uploaded to server. Promise should be\n * resolved with an object containing information about uploaded file:\n *\n *\t\t{\n *\t\t\tdefault: 'http://server/default-size.image.png'\n *\t\t}\n *\n * Additionally, other image sizes can be provided:\n *\n *\t\t{\n *\t\t\tdefault: 'http://server/default-size.image.png',\n *\t\t\t'160': 'http://server/size-160.image.png',\n *\t\t\t'500': 'http://server/size-500.image.png',\n *\t\t\t'1000': 'http://server/size-1000.image.png',\n *\t\t\t'1052': 'http://server/default-size.image.png'\n *\t\t}\n *\n * NOTE: When returning multiple images, the widest returned one should equal the default one. It is essential to\n * correctly set `width` attribute of the image. See this discussion:\n * https://github.com/ckeditor/ckeditor5-easy-image/issues/4 for more information.\n *\n * Take a look at {@link module:upload/filerepository~UploadAdapter example Adapter implementation} and\n * {@link module:upload/filerepository~FileRepository#createUploadAdapter createUploadAdapter method}.\n *\n * @method module:upload/filerepository~UploadAdapter#upload\n * @returns {Promise.<Object>} Promise that should be resolved when data is uploaded.\n */\n /**\n * Aborts the upload process.\n * After aborting it should reject promise returned from {@link #upload upload()}.\n *\n * Take a look at {@link module:upload/filerepository~UploadAdapter example Adapter implementation} and\n * {@link module:upload/filerepository~FileRepository#createUploadAdapter createUploadAdapter method}.\n *\n * @method module:upload/filerepository~UploadAdapter#abort\n */\n /**\n * Object returned by {@link module:upload/filerepository~FileLoader#_createFilePromiseWrapper} method\n * to add more control over the initial file promise passed to {@link module:upload/filerepository~FileLoader}.\n *\n * @protected\n * @typedef {Object} module:upload/filerepository~FilePromiseWrapper\n * @property {Promise.<File>} promise Wrapper promise which can be chained for further processing.\n * @property {Function} rejecter Rejects the promise when called.\n * @property {Boolean} isFulfilled Whether original promise is already fulfilled.\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module adapter-ckfinder/utils\n */\n\nconst TOKEN_COOKIE_NAME = 'ckCsrfToken';\nconst TOKEN_LENGTH = 40;\nconst tokenCharset = 'abcdefghijklmnopqrstuvwxyz0123456789';\n\n/**\n * Returns the CSRF token value. The value is a hash stored in `document.cookie`\n * under the `ckCsrfToken` key. The CSRF token can be used to secure the communication\n * between the web browser and the CKFinder server.\n *\n * @returns {String}\n */\nexport function getCsrfToken() {\n\tlet token = getCookie( TOKEN_COOKIE_NAME );\n\n\tif ( !token || token.length != TOKEN_LENGTH ) {\n\t\ttoken = generateToken( TOKEN_LENGTH );\n\t\tsetCookie( TOKEN_COOKIE_NAME, token );\n\t}\n\n\treturn token;\n}\n\n/**\n * Returns the value of the cookie with a given name or `null` if the cookie is not found.\n *\n * @param {String} name\n * @returns {String|null}\n */\nexport function getCookie( name ) {\n\tname = name.toLowerCase();\n\tconst parts = document.cookie.split( ';' );\n\n\tfor ( const part of parts ) {\n\t\tconst pair = part.split( '=' );\n\t\tconst key = decodeURIComponent( pair[ 0 ].trim().toLowerCase() );\n\n\t\tif ( key === name ) {\n\t\t\treturn decodeURIComponent( pair[ 1 ] );\n\t\t}\n\t}\n\n\treturn null;\n}\n\n/**\n * Sets the value of the cookie with a given name.\n *\n * @param {String} name\n * @param {String} value\n */\nexport function setCookie( name, value ) {\n\tdocument.cookie = encodeURIComponent( name ) + '=' + encodeURIComponent( value ) + ';path=/';\n}\n\n// Generates the CSRF token with the given length.\n//\n// @private\n// @param {Number} length\n// @returns {string}\nfunction generateToken( length ) {\n\tlet result = '';\n\tconst randValues = new Uint8Array( length );\n\n\twindow.crypto.getRandomValues( randValues );\n\n\tfor ( let j = 0; j < randValues.length; j++ ) {\n\t\tconst character = tokenCharset.charAt( randValues[ j ] % tokenCharset.length );\n\t\tresult += Math.random() > 0.5 ? character.toUpperCase() : character;\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/* globals XMLHttpRequest, FormData */\n/**\n * @module adapter-ckfinder/uploadadapter\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport { getCsrfToken } from './utils';\n/**\n * A plugin that enables file uploads in CKEditor 5 using the CKFinder server–side connector.\n *\n * See the {@glink features/image-upload/ckfinder \"CKFinder file manager integration\" guide} to learn how to configure\n * and use this feature as well as find out more about the full integration with the file manager\n * provided by the {@link module:ckfinder/ckfinder~CKFinder} plugin.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload overview\"} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderUploadAdapter extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [FileRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'CKFinderUploadAdapter';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const url = this.editor.config.get('ckfinder.uploadUrl');\n if (!url) {\n return;\n }\n // Register CKFinderAdapter\n this.editor.plugins.get(FileRepository).createUploadAdapter = loader => new UploadAdapter(loader, url, this.editor.t);\n }\n}\n/**\n * Upload adapter for CKFinder.\n *\n * @private\n * @implements module:upload/filerepository~UploadAdapter\n */\nclass UploadAdapter {\n /**\n\t * Creates a new adapter instance.\n\t *\n\t * @param {module:upload/filerepository~FileLoader} loader\n\t * @param {String} url\n\t * @param {module:utils/locale~Locale#t} t\n\t */\n constructor(loader, url, t) {\n /**\n\t\t * FileLoader instance to use during the upload.\n\t\t *\n\t\t * @member {module:upload/filerepository~FileLoader} #loader\n\t\t */\n this.loader = loader;\n /**\n\t\t * Upload URL.\n\t\t *\n\t\t * @member {String} #url\n\t\t */\n this.url = url;\n /**\n\t\t * Locale translation method.\n\t\t *\n\t\t * @member {module:utils/locale~Locale#t} #t\n\t\t */\n this.t = t;\n }\n /**\n\t * Starts the upload process.\n\t *\n\t * @see module:upload/filerepository~UploadAdapter#upload\n\t * @returns {Promise.<Object>}\n\t */\n upload() {\n return this.loader.file.then(file => {\n return new Promise((resolve, reject) => {\n this._initRequest();\n this._initListeners(resolve, reject, file);\n this._sendRequest(file);\n });\n });\n }\n /**\n\t * Aborts the upload process.\n\t *\n\t * @see module:upload/filerepository~UploadAdapter#abort\n\t */\n abort() {\n if (this.xhr) {\n this.xhr.abort();\n }\n }\n /**\n\t * Initializes the XMLHttpRequest object.\n\t *\n\t * @private\n\t */\n _initRequest() {\n const xhr = this.xhr = new XMLHttpRequest();\n xhr.open('POST', this.url, true);\n xhr.responseType = 'json';\n }\n /**\n\t * Initializes XMLHttpRequest listeners.\n\t *\n\t * @private\n\t * @param {Function} resolve Callback function to be called when the request is successful.\n\t * @param {Function} reject Callback function to be called when the request cannot be completed.\n\t * @param {File} file File instance to be uploaded.\n\t */\n _initListeners(resolve, reject, file) {\n const xhr = this.xhr;\n const loader = this.loader;\n const t = this.t;\n const genericError = t('a') + ` ${ file.name }.`;\n xhr.addEventListener('error', () => reject(genericError));\n xhr.addEventListener('abort', () => reject());\n xhr.addEventListener('load', () => {\n const response = xhr.response;\n if (!response || !response.uploaded) {\n return reject(response && response.error && response.error.message ? response.error.message : genericError);\n }\n resolve({ default: response.url });\n });\n // Upload progress when it's supported.\n /* istanbul ignore else */\n if (xhr.upload) {\n xhr.upload.addEventListener('progress', evt => {\n if (evt.lengthComputable) {\n loader.uploadTotal = evt.total;\n loader.uploaded = evt.loaded;\n }\n });\n }\n }\n /**\n\t * Prepares the data and sends the request.\n\t *\n\t * @private\n\t * @param {File} file File instance to be uploaded.\n\t */\n _sendRequest(file) {\n // Prepare form data.\n const data = new FormData();\n data.append('upload', file);\n data.append('ckCsrfToken', getCsrfToken());\n // Send request.\n this.xhr.send(data);\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/blockautoformatediting\n */\n\nimport LiveRange from '@ckeditor/ckeditor5-engine/src/model/liverange';\n\n/**\n * The block autoformatting engine. It allows to format various block patterns. For example,\n * it can be configured to turn a paragraph starting with `*` and followed by a space into a list item.\n *\n * The autoformatting operation is integrated with the undo manager,\n * so the autoformatting step can be undone if the user's intention was not to format the text.\n *\n * See the constructors documentation to learn how to create custom inline autoformatters. You can also use\n * the {@link module:autoformat/autoformat~Autoformat} feature which enables a set of default autoformatters\n * (lists, headings, bold and italic).\n */\nexport default class BlockAutoformatEditing {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockAutoformatEditing';\n\t}\n\n\t/**\n\t * Creates a listener triggered on `change` event in the document.\n\t * Calls the callback when inserted text matches the regular expression or the command name\n\t * if provided instead of the callback.\n\t *\n\t * Examples of usage:\n\t *\n\t * To convert a paragraph to heading 1 when `- ` is typed, using just the command name:\n\t *\n\t *\t\tnew BlockAutoformatEditing( editor, /^\\- $/, 'heading1' );\n\t *\n\t * To convert a paragraph to heading 1 when `- ` is typed, using just the callback:\n\t *\n\t *\t\tnew BlockAutoformatEditing( editor, /^\\- $/, ( context ) => {\n\t *\t\t\tconst { match } = context;\n\t *\t\t\tconst headingLevel = match[ 1 ].length;\n\t *\n\t *\t\t\teditor.execute( 'heading', {\n\t *\t\t\t\tformatId: `heading${ headingLevel }`\n\t *\t\t\t} );\n\t * \t\t} );\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {RegExp} pattern The regular expression to execute on just inserted text.\n\t * @param {Function|String} callbackOrCommand The callback to execute or the command to run when the text is matched.\n\t * In case of providing the callback, it receives the following parameter:\n\t * * {Object} match RegExp.exec() result of matching the pattern to inserted text.\n\t */\n\tconstructor( editor, pattern, callbackOrCommand ) {\n\t\tlet callback;\n\t\tlet command = null;\n\n\t\tif ( typeof callbackOrCommand == 'function' ) {\n\t\t\tcallback = callbackOrCommand;\n\t\t} else {\n\t\t\t// We assume that the actual command name was provided.\n\t\t\tcommand = editor.commands.get( callbackOrCommand );\n\n\t\t\tcallback = () => {\n\t\t\t\teditor.execute( callbackOrCommand );\n\t\t\t};\n\t\t}\n\n\t\teditor.model.document.on( 'change', ( evt, batch ) => {\n\t\t\tif ( command && !command.isEnabled ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( batch.type == 'transparent' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst changes = Array.from( editor.model.document.differ.getChanges() );\n\t\t\tconst entry = changes[ 0 ];\n\n\t\t\t// Typing is represented by only a single change.\n\t\t\tif ( changes.length != 1 || entry.type !== 'insert' || entry.name != '$text' || entry.length != 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst blockToFormat = entry.position.parent;\n\n\t\t\t// Block formatting should trigger only if the entire content of a paragraph is a single text node... (see ckeditor5#5671).\n\t\t\tif ( !blockToFormat.is( 'paragraph' ) || blockToFormat.childCount !== 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst match = pattern.exec( blockToFormat.getChild( 0 ).data );\n\n\t\t\t// ...and this text node's data match the pattern.\n\t\t\tif ( !match ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Use enqueueChange to create new batch to separate typing batch from the auto-format changes.\n\t\t\teditor.model.enqueueChange( writer => {\n\t\t\t\t// Matched range.\n\t\t\t\tconst start = writer.createPositionAt( blockToFormat, 0 );\n\t\t\t\tconst end = writer.createPositionAt( blockToFormat, match[ 0 ].length );\n\t\t\t\tconst range = new LiveRange( start, end );\n\n\t\t\t\tconst wasChanged = callback( { match } );\n\n\t\t\t\t// Remove matched text.\n\t\t\t\tif ( wasChanged !== false ) {\n\t\t\t\t\twriter.remove( range );\n\t\t\t\t}\n\n\t\t\t\trange.detach();\n\t\t\t} );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/inlineautoformatediting\n */\n\nimport getLastTextLine from '@ckeditor/ckeditor5-typing/src/utils/getlasttextline';\n\n/**\n * The inline autoformatting engine. It allows to format various inline patterns. For example,\n * it can be configured to make \"foo\" bold when typed `**foo**` (the `**` markers will be removed).\n *\n * The autoformatting operation is integrated with the undo manager,\n * so the autoformatting step can be undone if the user's intention was not to format the text.\n *\n * See the constructors documentation to learn how to create custom inline autoformatters. You can also use\n * the {@link module:autoformat/autoformat~Autoformat} feature which enables a set of default autoformatters\n * (lists, headings, bold and italic).\n */\nexport default class InlineAutoformatEditing {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'InlineAutoformatEditing';\n\t}\n\n\t/**\n\t * Enables autoformatting mechanism for a given {@link module:core/editor/editor~Editor}.\n\t *\n\t * It formats the matched text by applying the given model attribute or by running the provided formatting callback.\n\t * On every change applied to the model the autoformatting engine checks the text on the left of the selection\n\t * and executes the provided action if the text matches given criteria (regular expression or callback).\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {Function|RegExp} testRegexpOrCallback The regular expression or callback to execute on text.\n\t * Provided regular expression *must* have three capture groups. The first and the third capture group\n\t * should match opening and closing delimiters. The second capture group should match the text to format.\n\t *\n\t *\t\t// Matches the `**bold text**` pattern.\n\t *\t\t// There are three capturing groups:\n\t *\t\t// - The first to match the starting `**` delimiter.\n\t *\t\t// - The second to match the text to format.\n\t *\t\t// - The third to match the ending `**` delimiter.\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, 'bold' );\n\t *\n\t * When a function is provided instead of the regular expression, it will be executed with the text to match as a parameter.\n\t * The function should return proper \"ranges\" to delete and format.\n\t *\n\t *\t\t{\n\t *\t\t\tremove: [\n\t *\t\t\t\t[ 0, 1 ],\t// Remove the first letter from the given text.\n\t *\t\t\t\t[ 5, 6 ]\t// Remove the 6th letter from the given text.\n\t *\t\t\t],\n\t *\t\t\tformat: [\n\t *\t\t\t\t[ 1, 5 ]\t// Format all letters from 2nd to 5th.\n\t *\t\t\t]\n\t *\t\t}\n\t *\n\t * @param {Function|String} attributeOrCallback The name of attribute to apply on matching text or a callback for manual\n\t * formatting. If callback is passed it should return `false` if changes should not be applied (e.g. if a command is disabled).\n\t *\n\t *\t\t// Use attribute name:\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, 'bold' );\n\t *\n\t *\t\t// Use formatting callback:\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, ( writer, rangesToFormat ) => {\n\t *\t\t\tconst command = editor.commands.get( 'bold' );\n\t *\n\t *\t\t\tif ( !command.isEnabled ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\n\t *\t\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, 'bold' );\n\t *\n\t *\t\t\tfor ( let range of validRanges ) {\n\t *\t\t\t\twriter.setAttribute( 'bold', true, range );\n\t *\t\t\t}\n\t *\t\t} );\n\t */\n\tconstructor( editor, testRegexpOrCallback, attributeOrCallback ) {\n\t\tlet regExp;\n\t\tlet attributeKey;\n\t\tlet testCallback;\n\t\tlet formatCallback;\n\n\t\tif ( testRegexpOrCallback instanceof RegExp ) {\n\t\t\tregExp = testRegexpOrCallback;\n\t\t} else {\n\t\t\ttestCallback = testRegexpOrCallback;\n\t\t}\n\n\t\tif ( typeof attributeOrCallback == 'string' ) {\n\t\t\tattributeKey = attributeOrCallback;\n\t\t} else {\n\t\t\tformatCallback = attributeOrCallback;\n\t\t}\n\n\t\t// A test callback run on changed text.\n\t\ttestCallback = testCallback || ( text => {\n\t\t\tlet result;\n\t\t\tconst remove = [];\n\t\t\tconst format = [];\n\n\t\t\twhile ( ( result = regExp.exec( text ) ) !== null ) {\n\t\t\t\t// There should be full match and 3 capture groups.\n\t\t\t\tif ( result && result.length < 4 ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tlet {\n\t\t\t\t\tindex,\n\t\t\t\t\t'1': leftDel,\n\t\t\t\t\t'2': content,\n\t\t\t\t\t'3': rightDel\n\t\t\t\t} = result;\n\n\t\t\t\t// Real matched string - there might be some non-capturing groups so we need to recalculate starting index.\n\t\t\t\tconst found = leftDel + content + rightDel;\n\t\t\t\tindex += result[ 0 ].length - found.length;\n\n\t\t\t\t// Start and End offsets of delimiters to remove.\n\t\t\t\tconst delStart = [\n\t\t\t\t\tindex,\n\t\t\t\t\tindex + leftDel.length\n\t\t\t\t];\n\t\t\t\tconst delEnd = [\n\t\t\t\t\tindex + leftDel.length + content.length,\n\t\t\t\t\tindex + leftDel.length + content.length + rightDel.length\n\t\t\t\t];\n\n\t\t\t\tremove.push( delStart );\n\t\t\t\tremove.push( delEnd );\n\n\t\t\t\tformat.push( [ index + leftDel.length, index + leftDel.length + content.length ] );\n\t\t\t}\n\n\t\t\treturn {\n\t\t\t\tremove,\n\t\t\t\tformat\n\t\t\t};\n\t\t} );\n\n\t\t// A format callback run on matched text.\n\t\tformatCallback = formatCallback || ( ( writer, rangesToFormat ) => {\n\t\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, attributeKey );\n\n\t\t\tfor ( const range of validRanges ) {\n\t\t\t\twriter.setAttribute( attributeKey, true, range );\n\t\t\t}\n\n\t\t\t// After applying attribute to the text, remove given attribute from the selection.\n\t\t\t// This way user is able to type a text without attribute used by auto formatter.\n\t\t\twriter.removeSelectionAttribute( attributeKey );\n\t\t} );\n\n\t\teditor.model.document.on( 'change', ( evt, batch ) => {\n\t\t\tif ( batch.type == 'transparent' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst model = editor.model;\n\t\t\tconst selection = model.document.selection;\n\n\t\t\t// Do nothing if selection is not collapsed.\n\t\t\tif ( !selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst changes = Array.from( model.document.differ.getChanges() );\n\t\t\tconst entry = changes[ 0 ];\n\n\t\t\t// Typing is represented by only a single change.\n\t\t\tif ( changes.length != 1 || entry.type !== 'insert' || entry.name != '$text' || entry.length != 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst focus = selection.focus;\n\t\t\tconst block = focus.parent;\n\t\t\tconst { text, range } = getLastTextLine( model.createRange( model.createPositionAt( block, 0 ), focus ), model );\n\t\t\tconst testOutput = testCallback( text );\n\t\t\tconst rangesToFormat = testOutputToRanges( range.start, testOutput.format, model );\n\t\t\tconst rangesToRemove = testOutputToRanges( range.start, testOutput.remove, model );\n\n\t\t\tif ( !( rangesToFormat.length && rangesToRemove.length ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Use enqueueChange to create new batch to separate typing batch from the auto-format changes.\n\t\t\tmodel.enqueueChange( writer => {\n\t\t\t\t// Apply format.\n\t\t\t\tconst hasChanged = formatCallback( writer, rangesToFormat );\n\n\t\t\t\t// Strict check on `false` to have backward compatibility (when callbacks were returning `undefined`).\n\t\t\t\tif ( hasChanged === false ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Remove delimiters - use reversed order to not mix the offsets while removing.\n\t\t\t\tfor ( const range of rangesToRemove.reverse() ) {\n\t\t\t\t\twriter.remove( range );\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n}\n\n// Converts output of the test function provided to the InlineAutoformatEditing and converts it to the model ranges\n// inside provided block.\n//\n// @private\n// @param {module:engine/model/position~Position} start\n// @param {Array.<Array>} arrays\n// @param {module:engine/model/model~Model} model\nfunction testOutputToRanges( start, arrays, model ) {\n\treturn arrays\n\t\t.filter( array => ( array[ 0 ] !== undefined && array[ 1 ] !== undefined ) )\n\t\t.map( array => {\n\t\t\treturn model.createRange( start.getShiftedBy( array[ 0 ] ), start.getShiftedBy( array[ 1 ] ) );\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/getlasttextline\n */\n\n/**\n * Returns the last text line from the given range.\n *\n * \"The last text line\" is understood as text (from one or more text nodes) which is limited either by a parent block\n * or by inline elements (e.g. `<softBreak>`).\n *\n *\t\tconst rangeToCheck = model.createRange(\n *\t\t\tmodel.createPositionAt( paragraph, 0 ),\n *\t\t\tmodel.createPositionAt( paragraph, 'end' )\n *\t\t);\n *\n *\t\tconst { text, range } = getLastTextLine( rangeToCheck, model );\n *\n * For model below, the returned `text` will be \"Foo bar baz\" and `range` will be set on whole `<paragraph>` content:\n *\n *\t\t<paragraph>Foo bar baz<paragraph>\n *\n * However, in below case, `text` will be set to \"baz\" and `range` will be set only on \"baz\".\n *\n *\t\t<paragraph>Foo<softBreak></softBreak>bar<softBreak></softBreak>baz<paragraph>\n *\n * @protected\n * @param {module:engine/model/range~Range} range\n * @param {module:engine/model/model~Model} model\n * @returns {module:typing/utils/getlasttextline~LastTextLineData}\n */\nexport default function getLastTextLine( range, model ) {\n\tlet start = range.start;\n\n\tconst text = Array.from( range.getItems() ).reduce( ( rangeText, node ) => {\n\t\t// Trim text to a last occurrence of an inline element and update range start.\n\t\tif ( !( node.is( 'text' ) || node.is( 'textProxy' ) ) ) {\n\t\t\tstart = model.createPositionAfter( node );\n\n\t\t\treturn '';\n\t\t}\n\n\t\treturn rangeText + node.data;\n\t}, '' );\n\n\treturn { text, range: model.createRange( start, range.end ) };\n}\n\n/**\n * The value returned by {@link module:typing/utils/getlasttextline~getLastTextLine}.\n *\n * @typedef {Object} module:typing/utils/getlasttextline~LastTextLineData\n *\n * @property {String} text The text from the text nodes in the last text line.\n * @property {module:engine/model/range~Range} range The range set on the text nodes in the last text line.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/autoformat\n */\n\nimport BlockAutoformatEditing from './blockautoformatediting';\nimport InlineAutoformatEditing from './inlineautoformatediting';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * Enables a set of predefined autoformatting actions.\n *\n * For a detailed overview, check the {@glink features/autoformat Autoformatting feature documentation}\n * and the {@glink api/autoformat package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Autoformat extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Autoformat';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tthis._addListAutoformats();\n\t\tthis._addBasicStylesAutoformats();\n\t\tthis._addHeadingAutoformats();\n\t\tthis._addBlockQuoteAutoformats();\n\t\tthis._addCodeBlockAutoformats();\n\t}\n\n\t/**\n\t * Adds autoformatting related to the {@link module:list/list~List}.\n\t *\n\t * When typed:\n\t * - `* ` or `- ` – A paragraph will be changed to a bulleted list.\n\t * - `1. ` or `1) ` – A paragraph will be changed to a numbered list (\"1\" can be any digit or a list of digits).\n\t *\n\t * @private\n\t */\n\t_addListAutoformats() {\n\t\tconst commands = this.editor.commands;\n\n\t\tif ( commands.get( 'bulletedList' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^[*-]\\s$/, 'bulletedList' );\n\t\t}\n\n\t\tif ( commands.get( 'numberedList' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^1[.|)]\\s$/, 'numberedList' );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to the {@link module:basic-styles/bold~Bold},\n\t * {@link module:basic-styles/italic~Italic} and {@link module:basic-styles/code~Code}.\n\t *\n\t * When typed:\n\t * - `**foobar**` – `**` characters are removed and `foobar` is set to bold,\n\t * - `__foobar__` – `__` characters are removed and `foobar` is set to bold,\n\t * - `*foobar*` – `*` characters are removed and `foobar` is set to italic,\n\t * - `_foobar_` – `_` characters are removed and `foobar` is set to italic,\n\t * - ``` `foobar` – ``` ` ``` characters are removed and `foobar` is set to code.\n\t *\n\t * @private\n\t */\n\t_addBasicStylesAutoformats() {\n\t\tconst commands = this.editor.commands;\n\n\t\tif ( commands.get( 'bold' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst boldCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'bold' );\n\n\t\t\tnew InlineAutoformatEditing( this.editor, /(\\*\\*)([^*]+)(\\*\\*)$/g, boldCallback );\n\t\t\tnew InlineAutoformatEditing( this.editor, /(__)([^_]+)(__)$/g, boldCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\n\t\tif ( commands.get( 'italic' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst italicCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'italic' );\n\n\t\t\t// The italic autoformatter cannot be triggered by the bold markers, so we need to check the\n\t\t\t// text before the pattern (e.g. `(?:^|[^\\*])`).\n\t\t\tnew InlineAutoformatEditing( this.editor, /(?:^|[^*])(\\*)([^*_]+)(\\*)$/g, italicCallback );\n\t\t\tnew InlineAutoformatEditing( this.editor, /(?:^|[^_])(_)([^_]+)(_)$/g, italicCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\n\t\tif ( commands.get( 'code' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst codeCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'code' );\n\n\t\t\tnew InlineAutoformatEditing( this.editor, /(`)([^`]+)(`)$/g, codeCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:heading/heading~Heading}.\n\t *\n\t * It is using a number at the end of the command name to associate it with the proper trigger:\n\t *\n\t * * `heading` with value `heading1` will be executed when typing `#`,\n\t * * `heading` with value `heading2` will be executed when typing `##`,\n\t * * ... up to `heading6` and `######`.\n\t *\n\t * @private\n\t */\n\t_addHeadingAutoformats() {\n\t\tconst command = this.editor.commands.get( 'heading' );\n\n\t\tif ( command ) {\n\t\t\tcommand.modelElements\n\t\t\t\t.filter( name => name.match( /^heading[1-6]$/ ) )\n\t\t\t\t.forEach( commandValue => {\n\t\t\t\t\tconst level = commandValue[ 7 ];\n\t\t\t\t\tconst pattern = new RegExp( `^(#{${ level }})\\\\s$` );\n\n\t\t\t\t\t// eslint-disable-next-line no-new\n\t\t\t\t\tnew BlockAutoformatEditing( this.editor, pattern, () => {\n\t\t\t\t\t\tif ( !command.isEnabled ) {\n\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tthis.editor.execute( 'heading', { value: commandValue } );\n\t\t\t\t\t} );\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:block-quote/blockquote~BlockQuote}.\n\t *\n\t * When typed:\n\t * * `> ` – A paragraph will be changed to a block quote.\n\t *\n\t * @private\n\t */\n\t_addBlockQuoteAutoformats() {\n\t\tif ( this.editor.commands.get( 'blockQuote' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^>\\s$/, 'blockQuote' );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:code-block/codeblock~CodeBlock}.\n\t *\n\t * When typed:\n\t * - `` ``` `` – A paragraph will be changed to a code block.\n\t *\n\t * @private\n\t */\n\t_addCodeBlockAutoformats() {\n\t\tif ( this.editor.commands.get( 'codeBlock' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^```$/, 'codeBlock' );\n\t\t}\n\t}\n}\n\n// Helper function for getting `InlineAutoformatEditing` callbacks that checks if command is enabled.\n//\n// @param {module:core/editor/editor~Editor} editor\n// @param {String} attributeKey\n// @returns {Function}\nfunction getCallbackFunctionForInlineAutoformat( editor, attributeKey ) {\n\treturn ( writer, rangesToFormat ) => {\n\t\tconst command = editor.commands.get( attributeKey );\n\n\t\tif ( !command.isEnabled ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, attributeKey );\n\n\t\tfor ( const range of validRanges ) {\n\t\t\twriter.setAttribute( attributeKey, true, range );\n\t\t}\n\n\t\t// After applying attribute to the text, remove given attribute from the selection.\n\t\t// This way user is able to type a text without attribute used by auto formatter.\n\t\twriter.removeSelectionAttribute( attributeKey );\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/attributecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\n/**\n * An extension of the base {@link module:core/command~Command} class, which provides utilities for a command\n * that toggles a single attribute on a text or an element.\n *\n * `AttributeCommand` uses {@link module:engine/model/document~Document#selection}\n * to decide which nodes (if any) should be changed, and applies or removes the attribute from them.\n *\n * The command checks the {@link module:engine/model/model~Model#schema} to decide if it can be enabled\n * for the current selection and to which nodes the attribute can be applied.\n *\n * @extends module:core/command~Command\n */\nexport default class AttributeCommand extends Command {\n\t/**\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {String} attributeKey Attribute that will be set by the command.\n\t */\n\tconstructor( editor, attributeKey ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The attribute that will be set by the command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.attributeKey = attributeKey;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection#hasAttribute selection has the attribute} which means that:\n\t\t *\n\t\t * * If the selection is not empty – That the attribute is set on the first node in the selection that allows this attribute.\n\t\t * * If the selection is empty – That the selection has the attribute itself (which means that newly typed\n\t\t * text will have this attribute, too).\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t}\n\n\t/**\n\t * Updates the command's {@link #value} and {@link #isEnabled} based on the current selection.\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.value = this._getValueFromFirstAllowedNode();\n\t\tthis.isEnabled = model.schema.checkAttributeInSelection( doc.selection, this.attributeKey );\n\t}\n\n\t/**\n\t * Executes the command — applies the attribute to the selection or removes it from the selection.\n\t *\n\t * If the command is active (`value == true`), it will remove attributes. Otherwise, it will set attributes.\n\t *\n\t * The execution result differs, depending on the {@link module:engine/model/document~Document#selection}:\n\t *\n\t * * If the selection is on a range, the command applies the attribute to all nodes in that range\n\t * (if they are allowed to have this attribute by the {@link module:engine/model/schema~Schema schema}).\n\t * * If the selection is collapsed in a non-empty node, the command applies the attribute to the\n\t * {@link module:engine/model/document~Document#selection} itself (note that typed characters copy attributes from the selection).\n\t * * If the selection is collapsed in an empty node, the command applies the attribute to the parent node of the selection (note\n\t * that the selection inherits all attributes from a node if it is in an empty node).\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Command options.\n\t * @param {Boolean} [options.forceValue] If set, it will force the command behavior. If `true`, the command will apply the attribute,\n\t * otherwise the command will remove the attribute.\n\t * If not set, the command will look for its current value to decide what it should do.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst value = ( options.forceValue === undefined ) ? !this.value : options.forceValue;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tif ( value ) {\n\t\t\t\t\twriter.setSelectionAttribute( this.attributeKey, true );\n\t\t\t\t} else {\n\t\t\t\t\twriter.removeSelectionAttribute( this.attributeKey );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst ranges = model.schema.getValidRanges( selection.getRanges(), this.attributeKey );\n\n\t\t\t\tfor ( const range of ranges ) {\n\t\t\t\t\tif ( value ) {\n\t\t\t\t\t\twriter.setAttribute( this.attributeKey, value, range );\n\t\t\t\t\t} else {\n\t\t\t\t\t\twriter.removeAttribute( this.attributeKey, range );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the attribute value of the first node in the selection that allows the attribute.\n\t * For the collapsed selection returns the selection attribute.\n\t *\n\t * @private\n\t * @returns {Boolean} The attribute value.\n\t */\n\t_getValueFromFirstAllowedNode() {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst selection = model.document.selection;\n\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn selection.hasAttribute( this.attributeKey );\n\t\t}\n\n\t\tfor ( const range of selection.getRanges() ) {\n\t\t\tfor ( const item of range.getItems() ) {\n\t\t\t\tif ( schema.checkAttribute( item, this.attributeKey ) ) {\n\t\t\t\t\treturn item.hasAttribute( this.attributeKey );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/bold/boldediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport AttributeCommand from '../attributecommand';\n\nconst BOLD = 'bold';\n\n/**\n * The bold editing feature.\n *\n * It registers the `'bold'` command and introduces the `bold` attribute in the model which renders to the view\n * as a `<strong>` element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BoldEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BoldEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\t// Allow bold attribute on text nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: BOLD } );\n\t\teditor.model.schema.setAttributeProperties( BOLD, {\n\t\t\tisFormatting: true,\n\t\t\tcopyOnEnter: true\n\t\t} );\n\n\t\t// Build converter from model to view for data and editing pipelines.\n\t\teditor.conversion.attributeToElement( {\n\t\t\tmodel: BOLD,\n\t\t\tview: 'strong',\n\t\t\tupcastAlso: [\n\t\t\t\t'b',\n\t\t\t\tviewElement => {\n\t\t\t\t\tconst fontWeight = viewElement.getStyle( 'font-weight' );\n\n\t\t\t\t\tif ( !fontWeight ) {\n\t\t\t\t\t\treturn null;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Value of the `font-weight` attribute can be defined as a string or a number.\n\t\t\t\t\tif ( fontWeight == 'bold' || Number( fontWeight ) >= 600 ) {\n\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\tname: true,\n\t\t\t\t\t\t\tstyles: [ 'font-weight' ]\n\t\t\t\t\t\t};\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\t// Create bold command.\n\t\teditor.commands.add( BOLD, new AttributeCommand( editor, BOLD ) );\n\n\t\t// Set the Ctrl+B keystroke.\n\t\teditor.keystrokes.set( 'CTRL+B', BOLD );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module basic-styles/bold/boldui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport boldIcon from '../../theme/icons/bold.svg';\nconst BOLD = 'bold';\n/**\n * The bold UI feature. It introduces the Bold button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BoldUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Add bold button to feature components.\n editor.ui.componentFactory.add(BOLD, locale => {\n const command = editor.commands.get(BOLD);\n const view = new ButtonView(locale);\n view.set({\n label: t('ag'),\n icon: boldIcon,\n keystroke: 'CTRL+B',\n tooltip: true,\n isToggleable: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(view, 'execute', () => editor.execute(BOLD));\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M10.187 17H5.773c-.637 0-1.092-.138-1.364-.415-.273-.277-.409-.718-.409-1.323V4.738c0-.617.14-1.062.419-1.332.279-.27.73-.406 1.354-.406h4.68c.69 0 1.288.041 1.793.124.506.083.96.242 1.36.478.341.197.644.447.906.75a3.262 3.262 0 0 1 .808 2.162c0 1.401-.722 2.426-2.167 3.075C15.05 10.175 16 11.315 16 13.01a3.756 3.756 0 0 1-2.296 3.504 6.1 6.1 0 0 1-1.517.377c-.571.073-1.238.11-2 .11zm-.217-6.217H7v4.087h3.069c1.977 0 2.965-.69 2.965-2.072 0-.707-.256-1.22-.768-1.537-.512-.319-1.277-.478-2.296-.478zM7 5.13v3.619h2.606c.729 0 1.292-.067 1.69-.2a1.6 1.6 0 0 0 .91-.765c.165-.267.247-.566.247-.897 0-.707-.26-1.176-.778-1.409-.519-.232-1.31-.348-2.375-.348H7z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/italic/italicediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport AttributeCommand from '../attributecommand';\n\nconst ITALIC = 'italic';\n\n/**\n * The italic editing feature.\n *\n * It registers the `'italic'` command, the <kbd>Ctrl+I</kbd> keystroke and introduces the `italic` attribute in the model\n * which renders to the view as an `<i>` element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ItalicEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ItalicEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Allow italic attribute on text nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: ITALIC } );\n\t\teditor.model.schema.setAttributeProperties( ITALIC, {\n\t\t\tisFormatting: true,\n\t\t\tcopyOnEnter: true\n\t\t} );\n\n\t\teditor.conversion.attributeToElement( {\n\t\t\tmodel: ITALIC,\n\t\t\tview: 'i',\n\t\t\tupcastAlso: [\n\t\t\t\t'em',\n\t\t\t\t{\n\t\t\t\t\tstyles: {\n\t\t\t\t\t\t'font-style': 'italic'\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\t// Create italic command.\n\t\teditor.commands.add( ITALIC, new AttributeCommand( editor, ITALIC ) );\n\n\t\t// Set the Ctrl+I keystroke.\n\t\teditor.keystrokes.set( 'CTRL+I', ITALIC );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module basic-styles/italic/italicui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport italicIcon from '../../theme/icons/italic.svg';\nconst ITALIC = 'italic';\n/**\n * The italic UI feature. It introduces the Italic button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ItalicUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Add bold button to feature components.\n editor.ui.componentFactory.add(ITALIC, locale => {\n const command = editor.commands.get(ITALIC);\n const view = new ButtonView(locale);\n view.set({\n label: t('d'),\n icon: italicIcon,\n keystroke: 'CTRL+I',\n tooltip: true,\n isToggleable: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(view, 'execute', () => editor.execute(ITALIC));\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M9.586 14.633l.021.004c-.036.335.095.655.393.962.082.083.173.15.274.201h1.474a.6.6 0 1 1 0 1.2H5.304a.6.6 0 0 1 0-1.2h1.15c.474-.07.809-.182 1.005-.334.157-.122.291-.32.404-.597l2.416-9.55a1.053 1.053 0 0 0-.281-.823 1.12 1.12 0 0 0-.442-.296H8.15a.6.6 0 0 1 0-1.2h6.443a.6.6 0 1 1 0 1.2h-1.195c-.376.056-.65.155-.823.296-.215.175-.423.439-.623.79l-2.366 9.347z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/first\n */\n\n/**\n * Returns first item of the given `iterable`.\n *\n * @param {Iterable.<*>} iterable\n * @returns {*}\n */\nexport default function first( iterable ) {\n\tconst iteratorItem = iterable.next();\n\n\tif ( iteratorItem.done ) {\n\t\treturn null;\n\t}\n\n\treturn iteratorItem.value;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquotecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The block quote command plugin.\n *\n * @extends module:core/command~Command\n */\nexport default class BlockQuoteCommand extends Command {\n\t/**\n\t * Whether the selection starts in a block quote.\n\t *\n\t * @observable\n\t * @readonly\n\t * @member {Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.value = this._getValue();\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Executes the command. When the command {@link #value is on}, all top-most block quotes within\n\t * the selection will be removed. If it is off, all selected blocks will be wrapped with\n\t * a block quote.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Command options.\n\t * @param {Boolean} [options.forceValue] If set, it will force the command behavior. If `true`, the command will apply a block quote,\n\t * otherwise the command will remove the block quote. If not set, the command will act basing on its current value.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst selection = model.document.selection;\n\n\t\tconst blocks = Array.from( selection.getSelectedBlocks() );\n\n\t\tconst value = ( options.forceValue === undefined ) ? !this.value : options.forceValue;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( !value ) {\n\t\t\t\tthis._removeQuote( writer, blocks.filter( findQuote ) );\n\t\t\t} else {\n\t\t\t\tconst blocksToQuote = blocks.filter( block => {\n\t\t\t\t\t// Already quoted blocks needs to be considered while quoting too\n\t\t\t\t\t// in order to reuse their <bQ> elements.\n\t\t\t\t\treturn findQuote( block ) || checkCanBeQuoted( schema, block );\n\t\t\t\t} );\n\n\t\t\t\tthis._applyQuote( writer, blocksToQuote );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the command's {@link #value}.\n\t *\n\t * @private\n\t * @returns {Boolean} The current value.\n\t */\n\t_getValue() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\t// In the current implementation, the block quote must be an immediate parent of a block element.\n\t\treturn !!( firstBlock && findQuote( firstBlock ) );\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\tif ( this.value ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tconst selection = this.editor.model.document.selection;\n\t\tconst schema = this.editor.model.schema;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\tif ( !firstBlock ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn checkCanBeQuoted( schema, firstBlock );\n\t}\n\n\t/**\n\t * Removes the quote from given blocks.\n\t *\n\t * If blocks which are supposed to be \"unquoted\" are in the middle of a quote,\n\t * start it or end it, then the quote will be split (if needed) and the blocks\n\t * will be moved out of it, so other quoted blocks remained quoted.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer\n\t * @param {Array.<module:engine/model/element~Element>} blocks\n\t */\n\t_removeQuote( writer, blocks ) {\n\t\t// Unquote all groups of block. Iterate in the reverse order to not break following ranges.\n\t\tgetRangesOfBlockGroups( writer, blocks ).reverse().forEach( groupRange => {\n\t\t\tif ( groupRange.start.isAtStart && groupRange.end.isAtEnd ) {\n\t\t\t\twriter.unwrap( groupRange.start.parent );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The group of blocks are at the beginning of an <bQ> so let's move them left (out of the <bQ>).\n\t\t\tif ( groupRange.start.isAtStart ) {\n\t\t\t\tconst positionBefore = writer.createPositionBefore( groupRange.start.parent );\n\n\t\t\t\twriter.move( groupRange, positionBefore );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The blocks are in the middle of an <bQ> so we need to split the <bQ> after the last block\n\t\t\t// so we move the items there.\n\t\t\tif ( !groupRange.end.isAtEnd ) {\n\t\t\t\twriter.split( groupRange.end );\n\t\t\t}\n\n\t\t\t// Now we are sure that groupRange.end.isAtEnd is true, so let's move the blocks right.\n\n\t\t\tconst positionAfter = writer.createPositionAfter( groupRange.end.parent );\n\n\t\t\twriter.move( groupRange, positionAfter );\n\t\t} );\n\t}\n\n\t/**\n\t * Applies the quote to given blocks.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer\n\t * @param {Array.<module:engine/model/element~Element>} blocks\n\t */\n\t_applyQuote( writer, blocks ) {\n\t\tconst quotesToMerge = [];\n\n\t\t// Quote all groups of block. Iterate in the reverse order to not break following ranges.\n\t\tgetRangesOfBlockGroups( writer, blocks ).reverse().forEach( groupRange => {\n\t\t\tlet quote = findQuote( groupRange.start );\n\n\t\t\tif ( !quote ) {\n\t\t\t\tquote = writer.createElement( 'blockQuote' );\n\n\t\t\t\twriter.wrap( groupRange, quote );\n\t\t\t}\n\n\t\t\tquotesToMerge.push( quote );\n\t\t} );\n\n\t\t// Merge subsequent <bQ> elements. Reverse the order again because this time we want to go through\n\t\t// the <bQ> elements in the source order (due to how merge works – it moves the right element's content\n\t\t// to the first element and removes the right one. Since we may need to merge a couple of subsequent `<bQ>` elements\n\t\t// we want to keep the reference to the first (furthest left) one.\n\t\tquotesToMerge.reverse().reduce( ( currentQuote, nextQuote ) => {\n\t\t\tif ( currentQuote.nextSibling == nextQuote ) {\n\t\t\t\twriter.merge( writer.createPositionAfter( currentQuote ) );\n\n\t\t\t\treturn currentQuote;\n\t\t\t}\n\n\t\t\treturn nextQuote;\n\t\t} );\n\t}\n}\n\nfunction findQuote( elementOrPosition ) {\n\treturn elementOrPosition.parent.name == 'blockQuote' ? elementOrPosition.parent : null;\n}\n\n// Returns a minimal array of ranges containing groups of subsequent blocks.\n//\n// content: abcdefgh\n// blocks: [ a, b, d, f, g, h ]\n// output ranges: [ab]c[d]e[fgh]\n//\n// @param {Array.<module:engine/model/element~Element>} blocks\n// @returns {Array.<module:engine/model/range~Range>}\nfunction getRangesOfBlockGroups( writer, blocks ) {\n\tlet startPosition;\n\tlet i = 0;\n\tconst ranges = [];\n\n\twhile ( i < blocks.length ) {\n\t\tconst block = blocks[ i ];\n\t\tconst nextBlock = blocks[ i + 1 ];\n\n\t\tif ( !startPosition ) {\n\t\t\tstartPosition = writer.createPositionBefore( block );\n\t\t}\n\n\t\tif ( !nextBlock || block.nextSibling != nextBlock ) {\n\t\t\tranges.push( writer.createRange( startPosition, writer.createPositionAfter( block ) ) );\n\t\t\tstartPosition = null;\n\t\t}\n\n\t\ti++;\n\t}\n\n\treturn ranges;\n}\n\n// Checks whether <bQ> can wrap the block.\nfunction checkCanBeQuoted( schema, block ) {\n\t// TMP will be replaced with schema.checkWrap().\n\tconst isBQAllowed = schema.checkChild( block.parent, 'blockQuote' );\n\tconst isBlockAllowedInBQ = schema.checkChild( [ '$root', 'blockQuote' ], block );\n\n\treturn isBQAllowed && isBlockAllowedInBQ;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquoteediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport BlockQuoteCommand from './blockquotecommand';\n\n/**\n * The block quote editing.\n *\n * Introduces the `'blockQuote'` command and the `'blockQuote'` model element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuoteEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockQuoteEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\n\t\teditor.commands.add( 'blockQuote', new BlockQuoteCommand( editor ) );\n\n\t\tschema.register( 'blockQuote', {\n\t\t\tallowWhere: '$block',\n\t\t\tallowContentOf: '$root'\n\t\t} );\n\n\t\t// Disallow blockQuote in blockQuote.\n\t\tschema.addChildCheck( ( ctx, childDef ) => {\n\t\t\tif ( ctx.endsWith( 'blockQuote' ) && childDef.name == 'blockQuote' ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t} );\n\n\t\teditor.conversion.elementToElement( { model: 'blockQuote', view: 'blockquote' } );\n\n\t\t// Postfixer which cleans incorrect model states connected with block quotes.\n\t\teditor.model.document.registerPostFixer( writer => {\n\t\t\tconst changes = editor.model.document.differ.getChanges();\n\n\t\t\tfor ( const entry of changes ) {\n\t\t\t\tif ( entry.type == 'insert' ) {\n\t\t\t\t\tconst element = entry.position.nodeAfter;\n\n\t\t\t\t\tif ( !element ) {\n\t\t\t\t\t\t// We are inside a text node.\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( element.is( 'blockQuote' ) && element.isEmpty ) {\n\t\t\t\t\t\t// Added an empty blockQuote - remove it.\n\t\t\t\t\t\twriter.remove( element );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t} else if ( element.is( 'blockQuote' ) && !schema.checkChild( entry.position, element ) ) {\n\t\t\t\t\t\t// Added a blockQuote in incorrect place - most likely inside another blockQuote. Unwrap it\n\t\t\t\t\t\t// so the content inside is not lost.\n\t\t\t\t\t\twriter.unwrap( element );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t} else if ( element.is( 'element' ) ) {\n\t\t\t\t\t\t// Just added an element. Check its children to see if there are no nested blockQuotes somewhere inside.\n\t\t\t\t\t\tconst range = writer.createRangeIn( element );\n\n\t\t\t\t\t\tfor ( const child of range.getItems() ) {\n\t\t\t\t\t\t\tif ( child.is( 'blockQuote' ) && !schema.checkChild( writer.createPositionBefore( child ), child ) ) {\n\t\t\t\t\t\t\t\twriter.unwrap( child );\n\n\t\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} else if ( entry.type == 'remove' ) {\n\t\t\t\t\tconst parent = entry.position.parent;\n\n\t\t\t\t\tif ( parent.is( 'blockQuote' ) && parent.isEmpty ) {\n\t\t\t\t\t\t// Something got removed and now blockQuote is empty. Remove the blockQuote as well.\n\t\t\t\t\t\twriter.remove( parent );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn false;\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tconst editor = this.editor;\n\t\tconst command = editor.commands.get( 'blockQuote' );\n\n\t\t// Overwrite default Enter key behavior.\n\t\t// If Enter key is pressed with selection collapsed in empty block inside a quote, break the quote.\n\t\t// This listener is added in afterInit in order to register it after list's feature listener.\n\t\t// We can't use a priority for this, because 'low' is already used by the enter feature, unless\n\t\t// we'd use numeric priority in this case.\n\t\tthis.listenTo( this.editor.editing.view.document, 'enter', ( evt, data ) => {\n\t\t\tconst doc = this.editor.model.document;\n\t\t\tconst positionParent = doc.selection.getLastPosition().parent;\n\n\t\t\tif ( doc.selection.isCollapsed && positionParent.isEmpty && command.value ) {\n\t\t\t\tthis.editor.execute( 'blockQuote' );\n\t\t\t\tthis.editor.editing.view.scrollToTheSelection();\n\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module block-quote/blockquoteui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport quoteIcon from '@ckeditor/ckeditor5-core/theme/icons/quote.svg';\nimport '../theme/blockquote.css';\n/**\n * The block quote UI plugin.\n *\n * It introduces the `'blockQuote'` button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuoteUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n editor.ui.componentFactory.add('blockQuote', locale => {\n const command = editor.commands.get('blockQuote');\n const buttonView = new ButtonView(locale);\n buttonView.set({\n label: t('h'),\n icon: quoteIcon,\n tooltip: true,\n isToggleable: true\n });\n // Bind button model to command.\n buttonView.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(buttonView, 'execute', () => editor.execute('blockQuote'));\n return buttonView;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M3 10.423a6.5 6.5 0 0 1 6.056-6.408l.038.67C6.448 5.423 5.354 7.663 5.22 10H9c.552 0 .5.432.5.986v4.511c0 .554-.448.503-1 .503h-5c-.552 0-.5-.449-.5-1.003v-4.574zm8 0a6.5 6.5 0 0 1 6.056-6.408l.038.67c-2.646.739-3.74 2.979-3.873 5.315H17c.552 0 .5.432.5.986v4.511c0 .554-.448.503-1 .503h-5c-.552 0-.5-.449-.5-1.003v-4.574z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ckfinder/ckfinderui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport browseFilesIcon from '../theme/icons/browse-files.svg';\n/**\n * The CKFinder UI plugin. It introduces the `'ckfinder'` toolbar button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'CKFinderUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const componentFactory = editor.ui.componentFactory;\n const t = editor.t;\n componentFactory.add('ckfinder', locale => {\n const command = editor.commands.get('ckfinder');\n const button = new ButtonView(locale);\n button.set({\n label: t('g'),\n icon: browseFilesIcon,\n tooltip: true\n });\n button.bind('isEnabled').to(command);\n button.on('execute', () => {\n editor.execute('ckfinder');\n editor.editing.view.focus();\n });\n return button;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.627 16.5zm5.873-.196zm0-7.001V8h-13v8.5h4.341c.191.54.457 1.044.785 1.5H2a1.5 1.5 0 0 1-1.5-1.5v-13A1.5 1.5 0 0 1 2 2h4.5a1.5 1.5 0 0 1 1.06.44L9.122 4H16a1.5 1.5 0 0 1 1.5 1.5v1A1.5 1.5 0 0 1 19 8v2.531a6.027 6.027 0 0 0-1.5-1.228zM16 6.5v-1H8.5l-2-2H2v13h1V8a1.5 1.5 0 0 1 1.5-1.5H16z\\\"/><path d=\\\"M14.5 19.5a5 5 0 1 1 0-10 5 5 0 0 1 0 10zM15 14v-2h-1v2h-2v1h2v2h1v-2h2v-1h-2z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/imageloadobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\n\n/**\n * Observes all new images added to the {@link module:engine/view/document~Document},\n * fires {@link module:engine/view/document~Document#event:imageLoaded} and\n * {@link module:engine/view/document~Document#event:layoutChanged} event every time when the new image\n * has been loaded.\n *\n * **Note:** This event is not fired for images that has been added to the document and rendered as `complete` (already loaded).\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class ImageLoadObserver extends Observer {\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domRoot ) {\n\t\tthis.listenTo( domRoot, 'load', ( event, domEvent ) => {\n\t\t\tconst domElement = domEvent.target;\n\n\t\t\tif ( domElement.tagName == 'IMG' ) {\n\t\t\t\tthis._fireEvents( domEvent );\n\t\t\t}\n\t\t\t// Use capture phase for better performance (#4504).\n\t\t}, { useCapture: true } );\n\t}\n\n\t/**\n\t * Fires {@link module:engine/view/document~Document#event:layoutChanged} and\n\t * {@link module:engine/view/document~Document#event:imageLoaded}\n\t * if observer {@link #isEnabled is enabled}.\n\t *\n\t * @protected\n\t * @param {Event} domEvent The DOM event.\n\t */\n\t_fireEvents( domEvent ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( 'layoutChanged' );\n\t\t\tthis.document.fire( 'imageLoaded', domEvent );\n\t\t}\n\t}\n}\n\n/**\n * Fired when an <img/> DOM element has been loaded in the DOM root.\n *\n * Introduced by {@link module:image/image/imageloadobserver~ImageLoadObserver}.\n *\n * @see module:image/image/imageloadobserver~ImageLoadObserver\n * @event module:engine/view/document~Document#event:imageLoaded\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/converters\n */\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * Returns a function that converts the image view representation:\n *\n *\t\t<figure class=\"image\"><img src=\"...\" alt=\"...\"></img></figure>\n *\n * to the model representation:\n *\n *\t\t<image src=\"...\" alt=\"...\"></image>\n *\n * The entire content of the `<figure>` element except the first `<img>` is being converted as children\n * of the `<image>` model element.\n *\n * @returns {Function}\n */\nexport function viewFigureToModel() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element:figure', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\t// Do not convert if this is not an \"image figure\".\n\t\tif ( !conversionApi.consumable.test( data.viewItem, { name: true, classes: 'image' } ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Find an image element inside the figure element.\n\t\tconst viewImage = Array.from( data.viewItem.getChildren() ).find( viewChild => viewChild.is( 'img' ) );\n\n\t\t// Do not convert if image element is absent, is missing src attribute or was already converted.\n\t\tif ( !viewImage || !viewImage.hasAttribute( 'src' ) || !conversionApi.consumable.test( viewImage, { name: true } ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert view image to model image.\n\t\tconst conversionResult = conversionApi.convertItem( viewImage, data.modelCursor );\n\n\t\t// Get image element from conversion result.\n\t\tconst modelImage = first( conversionResult.modelRange.getItems() );\n\n\t\t// When image wasn't successfully converted then finish conversion.\n\t\tif ( !modelImage ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert rest of the figure element's children as an image children.\n\t\tconversionApi.convertChildren( data.viewItem, conversionApi.writer.createPositionAt( modelImage, 0 ) );\n\n\t\t// Set image range as conversion result.\n\t\tdata.modelRange = conversionResult.modelRange;\n\n\t\t// Continue conversion where image conversion ends.\n\t\tdata.modelCursor = conversionResult.modelCursor;\n\t}\n}\n\n/**\n * Converter used to convert the `srcset` model image attribute to the `srcset`, `sizes` and `width` attributes in the view.\n *\n * @returns {Function}\n */\nexport function srcsetAttributeConverter() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'attribute:srcset:image', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst writer = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\t\tconst img = figure.getChild( 0 );\n\n\t\tif ( data.attributeNewValue === null ) {\n\t\t\tconst srcset = data.attributeOldValue;\n\n\t\t\tif ( srcset.data ) {\n\t\t\t\twriter.removeAttribute( 'srcset', img );\n\t\t\t\twriter.removeAttribute( 'sizes', img );\n\n\t\t\t\tif ( srcset.width ) {\n\t\t\t\t\twriter.removeAttribute( 'width', img );\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tconst srcset = data.attributeNewValue;\n\n\t\t\tif ( srcset.data ) {\n\t\t\t\twriter.setAttribute( 'srcset', srcset.data, img );\n\t\t\t\t// Always outputting `100vw`. See https://github.com/ckeditor/ckeditor5-image/issues/2.\n\t\t\t\twriter.setAttribute( 'sizes', '100vw', img );\n\n\t\t\t\tif ( srcset.width ) {\n\t\t\t\t\twriter.setAttribute( 'width', srcset.width, img );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\nexport function modelToViewAttributeConverter( attributeKey ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( `attribute:${ attributeKey }:image`, converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\t\tconst img = figure.getChild( 0 );\n\n\t\tif ( data.attributeNewValue !== null ) {\n\t\t\tviewWriter.setAttribute( data.attributeKey, data.attributeNewValue, img );\n\t\t} else {\n\t\t\tviewWriter.removeAttribute( data.attributeKey, img );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/highlightstack\n */\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Class used to handle correct order of highlights on elements.\n *\n * When different highlights are applied to same element correct order should be preserved:\n *\n * * highlight with highest priority should be applied,\n * * if two highlights have same priority - sort by CSS class provided in\n * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor}.\n *\n * This way, highlight will be applied with the same rules it is applied on texts.\n */\nexport default class HighlightStack {\n\t/**\n\t * Creates class instance.\n\t */\n\tconstructor() {\n\t\tthis._stack = [];\n\t}\n\n\t/**\n\t * Adds highlight descriptor to the stack.\n\t *\n\t * @fires change:top\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\tadd( descriptor, writer ) {\n\t\tconst stack = this._stack;\n\n\t\t// Save top descriptor and insert new one. If top is changed - fire event.\n\t\tconst oldTop = stack[ 0 ];\n\t\tthis._insertDescriptor( descriptor );\n\t\tconst newTop = stack[ 0 ];\n\n\t\t// When new object is at the top and stores different information.\n\t\tif ( oldTop !== newTop && !compareDescriptors( oldTop, newTop ) ) {\n\t\t\tthis.fire( 'change:top', {\n\t\t\t\toldDescriptor: oldTop,\n\t\t\t\tnewDescriptor: newTop,\n\t\t\t\twriter\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Removes highlight descriptor from the stack.\n\t *\n\t * @fires change:top\n\t * @param {String} id Id of the descriptor to remove.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\tremove( id, writer ) {\n\t\tconst stack = this._stack;\n\n\t\tconst oldTop = stack[ 0 ];\n\t\tthis._removeDescriptor( id );\n\t\tconst newTop = stack[ 0 ];\n\n\t\t// When new object is at the top and stores different information.\n\t\tif ( oldTop !== newTop && !compareDescriptors( oldTop, newTop ) ) {\n\t\t\tthis.fire( 'change:top', {\n\t\t\t\toldDescriptor: oldTop,\n\t\t\t\tnewDescriptor: newTop,\n\t\t\t\twriter\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Inserts given descriptor in correct place in the stack. It also takes care about updating information when\n\t * descriptor with same id is already present.\n\t *\n\t * @private\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n\t */\n\t_insertDescriptor( descriptor ) {\n\t\tconst stack = this._stack;\n\t\tconst index = stack.findIndex( item => item.id === descriptor.id );\n\n\t\t// Inserting exact same descriptor - do nothing.\n\t\tif ( compareDescriptors( descriptor, stack[ index ] ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If descriptor with same id but with different information is on the stack - remove it.\n\t\tif ( index > -1 ) {\n\t\t\tstack.splice( index, 1 );\n\t\t}\n\n\t\t// Find correct place to insert descriptor in the stack.\n\t\t// It have different information (for example priority) so it must be re-inserted in correct place.\n\t\tlet i = 0;\n\n\t\twhile ( stack[ i ] && shouldABeBeforeB( stack[ i ], descriptor ) ) {\n\t\t\ti++;\n\t\t}\n\n\t\tstack.splice( i, 0, descriptor );\n\t}\n\n\t/**\n\t * Removes descriptor with given id from the stack.\n\t *\n\t * @private\n\t * @param {String} id Descriptor's id.\n\t */\n\t_removeDescriptor( id ) {\n\t\tconst stack = this._stack;\n\t\tconst index = stack.findIndex( item => item.id === id );\n\n\t\t// If descriptor with same id is on the list - remove it.\n\t\tif ( index > -1 ) {\n\t\t\tstack.splice( index, 1 );\n\t\t}\n\t}\n}\n\nmix( HighlightStack, EmitterMixin );\n\n// Compares two descriptors by checking their priority and class list.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} a\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} b\n// @returns {Boolean} Returns true if both descriptors are defined and have same priority and classes.\nfunction compareDescriptors( a, b ) {\n\treturn a && b && a.priority == b.priority && classesToString( a.classes ) == classesToString( b.classes );\n}\n\n// Checks whenever first descriptor should be placed in the stack before second one.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} a\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} b\n// @returns {Boolean}\nfunction shouldABeBeforeB( a, b ) {\n\tif ( a.priority > b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority < b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use classes to compare.\n\treturn classesToString( a.classes ) > classesToString( b.classes );\n}\n\n// Converts CSS classes passed with {@link module:engine/conversion/downcasthelpers~HighlightDescriptor} to\n// sorted string.\n//\n// @param {String|Array<String>} descriptor\n// @returns {String}\nfunction classesToString( classes ) {\n\treturn Array.isArray( classes ) ? classes.sort().join( ',' ) : classes;\n}\n\n/**\n * Fired when top element on {@link module:widget/highlightstack~HighlightStack} has been changed\n *\n * @event change:top\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} [data.newDescriptor] New highlight\n * descriptor. It will be `undefined` when last descriptor is removed from the stack.\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} [data.oldDescriptor] Old highlight\n * descriptor. It will be `undefined` when first descriptor is added to the stack.\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that can be used to modify element.\n */\n","export default \"<svg viewBox=\\\"0 0 16 16\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M4 0v1H1v3H0V.5A.5.5 0 0 1 .5 0H4zm8 0h3.5a.5.5 0 0 1 .5.5V4h-1V1h-3V0zM4 16H.5a.5.5 0 0 1-.5-.5V12h1v3h3v1zm8 0v-1h3v-3h1v3.5a.5.5 0 0 1-.5.5H12z\\\"/><path fill-opacity=\\\".256\\\" d=\\\"M1 1h14v14H1z\\\"/><g class=\\\"ck-icon__selected-indicator\\\"><path d=\\\"M7 0h2v1H7V0zM0 7h1v2H0V7zm15 0h1v2h-1V7zm-8 8h2v1H7v-1z\\\"/><path fill-opacity=\\\".254\\\" d=\\\"M1 1h14v14H1z\\\"/></g></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/utils\n */\n\nimport HighlightStack from './highlightstack';\nimport IconView from '@ckeditor/ckeditor5-ui/src/icon/iconview';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport dragHandleIcon from '../theme/icons/drag-handle.svg';\n\n/**\n * CSS class added to each widget element.\n *\n * @const {String}\n */\nexport const WIDGET_CLASS_NAME = 'ck-widget';\n\n/**\n * CSS class added to currently selected widget element.\n *\n * @const {String}\n */\nexport const WIDGET_SELECTED_CLASS_NAME = 'ck-widget_selected';\n\n/**\n * Returns `true` if given {@link module:engine/view/node~Node} is an {@link module:engine/view/element~Element} and a widget.\n *\n * @param {module:engine/view/node~Node} node\n * @returns {Boolean}\n */\nexport function isWidget( node ) {\n\tif ( !node.is( 'element' ) ) {\n\t\treturn false;\n\t}\n\n\treturn !!node.getCustomProperty( 'widget' );\n}\n\n/* eslint-disable max-len */\n/**\n * Converts the given {@link module:engine/view/element~Element} to a widget in the following way:\n *\n * * sets the `contenteditable` attribute to `\"true\"`,\n * * adds the `ck-widget` CSS class,\n * * adds a custom {@link module:engine/view/element~Element#getFillerOffset `getFillerOffset()`} method returning `null`,\n * * adds a custom property allowing to recognize widget elements by using {@link ~isWidget `isWidget()`},\n * * implements the {@link ~setHighlightHandling view highlight on widgets}.\n *\n * This function needs to be used in conjunction with\n * {@link module:engine/conversion/downcasthelpers~DowncastHelpers downcast conversion helpers}\n * like {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`}.\n * Moreover, typically you will want to use `toWidget()` only for `editingDowncast`, while keeping the `dataDowncast` clean.\n *\n * For example, in order to convert a `<widget>` model element to `<div class=\"widget\">` in the view, you can define\n * such converters:\n *\n *\t\teditor.conversion.for( 'editingDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'widget',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\tconst div = writer.createContainerElement( 'div', { class: 'widget' } );\n *\n *\t\t\t\t\treturn toWidget( div, writer, { label: 'some widget' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n *\t\teditor.conversion.for( 'dataDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'widget',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\treturn writer.createContainerElement( 'div', { class: 'widget' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n * See the full source code of the widget (with a nested editable) schema definition and converters in\n * [this sample](https://github.com/ckeditor/ckeditor5-widget/blob/master/tests/manual/widget-with-nestededitable.js).\n *\n * @param {module:engine/view/element~Element} element\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {Object} [options={}]\n * @param {String|Function} [options.label] Element's label provided to the {@link ~setLabel} function. It can be passed as\n * a plain string or a function returning a string. It represents the widget for assistive technologies (like screen readers).\n * @param {Boolean} [options.hasSelectionHandle=false] If `true`, the widget will have a selection handle added.\n * @returns {module:engine/view/element~Element} Returns the same element.\n */\n/* eslint-enable max-len */\nexport function toWidget( element, writer, options = {} ) {\n\t// The selection on Edge behaves better when the whole editor contents is in a single contenteditable element.\n\t// https://github.com/ckeditor/ckeditor5/issues/1079\n\tif ( !env.isEdge ) {\n\t\twriter.setAttribute( 'contenteditable', 'false', element );\n\t}\n\n\twriter.addClass( WIDGET_CLASS_NAME, element );\n\twriter.setCustomProperty( 'widget', true, element );\n\telement.getFillerOffset = getFillerOffset;\n\n\tif ( options.label ) {\n\t\tsetLabel( element, options.label, writer );\n\t}\n\n\tif ( options.hasSelectionHandle ) {\n\t\taddSelectionHandle( element, writer );\n\t}\n\n\tsetHighlightHandling(\n\t\telement,\n\t\twriter,\n\t\t( element, descriptor, writer ) => writer.addClass( normalizeToArray( descriptor.classes ), element ),\n\t\t( element, descriptor, writer ) => writer.removeClass( normalizeToArray( descriptor.classes ), element )\n\t);\n\n\treturn element;\n\n\t// Normalizes CSS class in descriptor that can be provided in form of an array or a string.\n\tfunction normalizeToArray( classes ) {\n\t\treturn Array.isArray( classes ) ? classes : [ classes ];\n\t}\n}\n\n/**\n * Sets highlight handling methods. Uses {@link module:widget/highlightstack~HighlightStack} to\n * properly determine which highlight descriptor should be used at given time.\n *\n * @param {module:engine/view/element~Element} element\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {Function} add\n * @param {Function} remove\n */\nexport function setHighlightHandling( element, writer, add, remove ) {\n\tconst stack = new HighlightStack();\n\n\tstack.on( 'change:top', ( evt, data ) => {\n\t\tif ( data.oldDescriptor ) {\n\t\t\tremove( element, data.oldDescriptor, data.writer );\n\t\t}\n\n\t\tif ( data.newDescriptor ) {\n\t\t\tadd( element, data.newDescriptor, data.writer );\n\t\t}\n\t} );\n\n\twriter.setCustomProperty( 'addHighlight', ( element, descriptor, writer ) => stack.add( descriptor, writer ), element );\n\twriter.setCustomProperty( 'removeHighlight', ( element, id, writer ) => stack.remove( id, writer ), element );\n}\n\n/**\n * Sets label for given element.\n * It can be passed as a plain string or a function returning a string. Function will be called each time label is retrieved by\n * {@link ~getLabel `getLabel()`}.\n *\n * @param {module:engine/view/element~Element} element\n * @param {String|Function} labelOrCreator\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n */\nexport function setLabel( element, labelOrCreator, writer ) {\n\twriter.setCustomProperty( 'widgetLabel', labelOrCreator, element );\n}\n\n/**\n * Returns the label of the provided element.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {String}\n */\nexport function getLabel( element ) {\n\tconst labelCreator = element.getCustomProperty( 'widgetLabel' );\n\n\tif ( !labelCreator ) {\n\t\treturn '';\n\t}\n\n\treturn typeof labelCreator == 'function' ? labelCreator() : labelCreator;\n}\n\n/**\n * Adds functionality to the provided {@link module:engine/view/editableelement~EditableElement} to act as a widget's editable:\n *\n * * sets the `contenteditable` attribute to `true` when {@link module:engine/view/editableelement~EditableElement#isReadOnly} is `false`,\n * otherwise sets it to `false`,\n * * adds the `ck-editor__editable` and `ck-editor__nested-editable` CSS classes,\n * * adds the `ck-editor__nested-editable_focused` CSS class when the editable is focused and removes it when it is blurred.\n *\n * Similarly to {@link ~toWidget `toWidget()`} this function should be used in `dataDowncast` only and it is usually\n * used together with {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`}.\n *\n * For example, in order to convert a `<nested>` model element to `<div class=\"nested\">` in the view, you can define\n * such converters:\n *\n *\t\teditor.conversion.for( 'editingDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'nested',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\tconst div = writer.createEditableElement( 'div', { class: 'nested' } );\n *\n *\t\t\t\t\treturn toWidgetEditable( nested, writer );\n *\t\t\t\t}\n *\t\t\t} );\n *\n *\t\teditor.conversion.for( 'dataDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'nested',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\treturn writer.createContainerElement( 'div', { class: 'nested' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n * See the full source code of the widget (with nested editable) schema definition and converters in\n * [this sample](https://github.com/ckeditor/ckeditor5-widget/blob/master/tests/manual/widget-with-nestededitable.js).\n *\n * @param {module:engine/view/editableelement~EditableElement} editable\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @returns {module:engine/view/editableelement~EditableElement} Returns the same element that was provided in the `editable` parameter\n */\nexport function toWidgetEditable( editable, writer ) {\n\twriter.addClass( [ 'ck-editor__editable', 'ck-editor__nested-editable' ], editable );\n\n\t// The selection on Edge behaves better when the whole editor contents is in a single contentedible element.\n\t// https://github.com/ckeditor/ckeditor5/issues/1079\n\tif ( !env.isEdge ) {\n\t\t// Set initial contenteditable value.\n\t\twriter.setAttribute( 'contenteditable', editable.isReadOnly ? 'false' : 'true', editable );\n\n\t\t// Bind the contenteditable property to element#isReadOnly.\n\t\teditable.on( 'change:isReadOnly', ( evt, property, is ) => {\n\t\t\twriter.setAttribute( 'contenteditable', is ? 'false' : 'true', editable );\n\t\t} );\n\t}\n\n\teditable.on( 'change:isFocused', ( evt, property, is ) => {\n\t\tif ( is ) {\n\t\t\twriter.addClass( 'ck-editor__nested-editable_focused', editable );\n\t\t} else {\n\t\t\twriter.removeClass( 'ck-editor__nested-editable_focused', editable );\n\t\t}\n\t} );\n\n\treturn editable;\n}\n\n/**\n * Returns a model position which is optimal (in terms of UX) for inserting a widget block.\n *\n * For instance, if a selection is in the middle of a paragraph, the position before this paragraph\n * will be returned so that it is not split. If the selection is at the end of a paragraph,\n * the position after this paragraph will be returned.\n *\n * Note: If the selection is placed in an empty block, that block will be returned. If that position\n * is then passed to {@link module:engine/model/model~Model#insertContent},\n * the block will be fully replaced by the image.\n *\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection based on which the insertion position should be calculated.\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {module:engine/model/position~Position} The optimal position.\n */\nexport function findOptimalInsertionPosition( selection, model ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\tif ( selectedElement && model.schema.isBlock( selectedElement ) ) {\n\t\treturn model.createPositionAfter( selectedElement );\n\t}\n\n\tconst firstBlock = selection.getSelectedBlocks().next().value;\n\n\tif ( firstBlock ) {\n\t\t// If inserting into an empty block – return position in that block. It will get\n\t\t// replaced with the image by insertContent(). #42.\n\t\tif ( firstBlock.isEmpty ) {\n\t\t\treturn model.createPositionAt( firstBlock, 0 );\n\t\t}\n\n\t\tconst positionAfter = model.createPositionAfter( firstBlock );\n\n\t\t// If selection is at the end of the block - return position after the block.\n\t\tif ( selection.focus.isTouching( positionAfter ) ) {\n\t\t\treturn positionAfter;\n\t\t}\n\n\t\t// Otherwise return position before the block.\n\t\treturn model.createPositionBefore( firstBlock );\n\t}\n\n\treturn selection.focus;\n}\n\n/**\n * A util to be used in order to map view positions to correct model positions when implementing a widget\n * which renders non-empty view element for an empty model element.\n *\n * For example:\n *\n *\t\t// Model:\n *\t\t<placeholder type=\"name\"></placeholder>\n *\n *\t\t// View:\n *\t\t<span class=\"placeholder\">name</span>\n *\n * In such case, view positions inside `<span>` cannot be correct mapped to the model (because the model element is empty).\n * To handle mapping positions inside `<span class=\"placeholder\">` to the model use this util as follows:\n *\n *\t\teditor.editing.mapper.on(\n *\t\t\t'viewToModelPosition',\n *\t\t\tviewToModelPositionOutsideModelElement( model, viewElement => viewElement.hasClass( 'placeholder' ) )\n *\t\t);\n *\n * The callback will try to map the view offset of selection to an expected model position.\n *\n * 1. When the position is at the end (or in the middle) of the inline widget:\n *\n *\t\t// View:\n *\t\t<p>foo <span class=\"placeholder\">name|</span> bar</p>\n *\n *\t\t// Model:\n *\t\t<paragraph>foo <placeholder type=\"name\"></placeholder>| bar</paragraph>\n *\n * 2. When the position is at the beginning of the inline widget:\n *\n *\t\t// View:\n *\t\t<p>foo <span class=\"placeholder\">|name</span> bar</p>\n *\n *\t\t// Model:\n *\t\t<paragraph>foo |<placeholder type=\"name\"></placeholder> bar</paragraph>\n *\n * @param {module:engine/model/model~Model} model Model instance on which the callback operates.\n * @param {Function} viewElementMatcher Function that is passed a view element and should return `true` if the custom mapping\n * should be applied to the given view element.\n * @return {Function}\n */\nexport function viewToModelPositionOutsideModelElement( model, viewElementMatcher ) {\n\treturn ( evt, data ) => {\n\t\tconst { mapper, viewPosition } = data;\n\n\t\tconst viewParent = mapper.findMappedViewAncestor( viewPosition );\n\n\t\tif ( !viewElementMatcher( viewParent ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelParent = mapper.toModelElement( viewParent );\n\n\t\tdata.modelPosition = model.createPositionAt( modelParent, viewPosition.isAtStart ? 'before' : 'after' );\n\t};\n}\n\n// Default filler offset function applied to all widget elements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n\n// Adds a drag handle to the widget.\n//\n// @param {module:engine/view/containerelement~ContainerElement}\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction addSelectionHandle( widgetElement, writer ) {\n\tconst selectionHandle = writer.createUIElement( 'div', { class: 'ck ck-widget__selection-handle' }, function( domDocument ) {\n\t\tconst domElement = this.toDomElement( domDocument );\n\n\t\t// Use the IconView from the ui library.\n\t\tconst icon = new IconView();\n\t\ticon.set( 'content', dragHandleIcon );\n\n\t\t// Render the icon view right away to append its #element to the selectionHandle DOM element.\n\t\ticon.render();\n\n\t\tdomElement.appendChild( icon.element );\n\n\t\treturn domElement;\n\t} );\n\n\t// Append the selection handle into the widget wrapper.\n\twriter.insert( writer.createPositionAt( widgetElement, 0 ), selectionHandle );\n\twriter.addClass( [ 'ck-widget_with-selection-handle' ], widgetElement );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/utils\n */\n\nimport { findOptimalInsertionPosition, isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to an image widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the image widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label. It will be concatenated with the image `alt` attribute if one is present.\n * @returns {module:engine/view/element~Element}\n */\nexport function toImageWidget( viewElement, writer, label ) {\n\twriter.setCustomProperty( 'image', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { label: labelCreator } );\n\n\tfunction labelCreator() {\n\t\tconst imgElement = viewElement.getChild( 0 );\n\t\tconst altText = imgElement.getAttribute( 'alt' );\n\n\t\treturn altText ? `${ altText } ${ label }` : label;\n\t}\n}\n\n/**\n * Checks if a given view element is an image widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isImageWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'image' ) && isWidget( viewElement );\n}\n\n/**\n * Returns an image widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedImageWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isImageWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Checks if the provided model element is an `image`.\n *\n * @param {module:engine/model/element~Element} modelElement\n * @returns {Boolean}\n */\nexport function isImage( modelElement ) {\n\treturn !!modelElement && modelElement.is( 'image' );\n}\n\n/**\n * Handles inserting single file. This method unifies image insertion using {@link module:widget/utils~findOptimalInsertionPosition} method.\n *\n *\t\tmodel.change( writer => {\n *\t\t\tinsertImage( writer, model, { src: 'path/to/image.jpg' } );\n *\t\t} );\n *\n * @param {module:engine/model/writer~Writer} writer\n * @param {module:engine/model/model~Model} model\n * @param {Object} [attributes={}] Attributes of inserted image\n */\nexport function insertImage( writer, model, attributes = {} ) {\n\tconst imageElement = writer.createElement( 'image', attributes );\n\n\tconst insertAtSelection = findOptimalInsertionPosition( model.document.selection, model );\n\n\tmodel.insertContent( imageElement, insertAtSelection );\n\n\t// Inserting an image might've failed due to schema regulations.\n\tif ( imageElement.parent ) {\n\t\twriter.setSelection( imageElement, 'on' );\n\t}\n}\n\n/**\n * Checks if image can be inserted at current model selection.\n *\n * @param {module:engine/model/model~Model} model\n * @returns {Boolean}\n */\nexport function isImageAllowed( model ) {\n\tconst schema = model.schema;\n\tconst selection = model.document.selection;\n\n\treturn isImageAllowedInParent( selection, schema, model ) &&\n\t\t!checkSelectionOnObject( selection, schema ) &&\n\t\tisInOtherImage( selection );\n}\n\n// Checks if image is allowed by schema in optimal insertion parent.\n//\n// @returns {Boolean}\nfunction isImageAllowedInParent( selection, schema, model ) {\n\tconst parent = getInsertImageParent( selection, model );\n\n\treturn schema.checkChild( parent, 'image' );\n}\n\n// Check if selection is on object.\n//\n// @returns {Boolean}\nfunction checkSelectionOnObject( selection, schema ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\treturn selectedElement && schema.isObject( selectedElement );\n}\n\n// Checks if selection is placed in other image (ie. in caption).\nfunction isInOtherImage( selection ) {\n\treturn [ ...selection.focus.getAncestors() ].every( ancestor => !ancestor.is( 'image' ) );\n}\n\n// Returns a node that will be used to insert image with `model.insertContent` to check if image can be placed there.\nfunction getInsertImageParent( selection, model ) {\n\tconst insertAt = findOptimalInsertionPosition( selection, model );\n\n\tconst parent = insertAt.parent;\n\n\tif ( parent.isEmpty && !parent.is( '$root' ) ) {\n\t\treturn parent.parent;\n\t}\n\n\treturn parent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { insertImage, isImageAllowed } from './utils';\n\n/**\n * @module image/image/imageinsertcommand\n */\n\n/**\n * Insert image command.\n *\n * The command is registered by the {@link module:image/image/imageediting~ImageEditing} plugin as `'imageInsert'`.\n *\n * In order to insert an image at the current selection position\n * (according to the {@link module:widget/utils~findOptimalInsertionPosition} algorithm),\n * execute the command and specify the image source:\n *\n *\t\teditor.execute( 'imageInsert', { source: 'http://url.to.the/image' } );\n *\n * It is also possible to insert multiple images at once:\n *\n *\t\teditor.execute( 'imageInsert', {\n *\t\t\tsource: [\n *\t\t\t\t'path/to/image.jpg',\n *\t\t\t\t'path/to/other-image.jpg'\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:core/command~Command\n */\nexport default class ImageInsertCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = isImageAllowed( this.editor.model );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options Options for the executed command.\n\t * @param {String|Array.<String>} options.source The image source or an array of image sources to insert.\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\n\t\tmodel.change( writer => {\n\t\t\tconst sources = Array.isArray( options.source ) ? options.source : [ options.source ];\n\n\t\t\tfor ( const src of sources ) {\n\t\t\t\tinsertImage( writer, model, { src } );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/image/imageediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageLoadObserver from './imageloadobserver';\nimport {\n viewFigureToModel,\n modelToViewAttributeConverter,\n srcsetAttributeConverter\n} from './converters';\nimport { toImageWidget } from './utils';\nimport ImageInsertCommand from './imageinsertcommand';\n/**\n * The image engine plugin.\n *\n * It registers:\n *\n * * `<image>` as a block element in the document schema, and allows `alt`, `src` and `srcset` attributes.\n * * converters for editing and data pipelines.\n * * `'imageInsert'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const schema = editor.model.schema;\n const t = editor.t;\n const conversion = editor.conversion;\n // See https://github.com/ckeditor/ckeditor5-image/issues/142.\n editor.editing.view.addObserver(ImageLoadObserver);\n // Configure schema.\n schema.register('image', {\n isObject: true,\n isBlock: true,\n allowWhere: '$block',\n allowAttributes: [\n 'alt',\n 'src',\n 'srcset'\n ]\n });\n conversion.for('dataDowncast').elementToElement({\n model: 'image',\n view: (modelElement, viewWriter) => createImageViewElement(viewWriter)\n });\n conversion.for('editingDowncast').elementToElement({\n model: 'image',\n view: (modelElement, viewWriter) => toImageWidget(createImageViewElement(viewWriter), viewWriter, t('i'))\n });\n conversion.for('downcast').add(modelToViewAttributeConverter('src')).add(modelToViewAttributeConverter('alt')).add(srcsetAttributeConverter());\n conversion.for('upcast').elementToElement({\n view: {\n name: 'img',\n attributes: { src: true }\n },\n model: (viewImage, modelWriter) => modelWriter.createElement('image', { src: viewImage.getAttribute('src') })\n }).attributeToAttribute({\n view: {\n name: 'img',\n key: 'alt'\n },\n model: 'alt'\n }).attributeToAttribute({\n view: {\n name: 'img',\n key: 'srcset'\n },\n model: {\n key: 'srcset',\n value: viewImage => {\n const value = { data: viewImage.getAttribute('srcset') };\n if (viewImage.hasAttribute('width')) {\n value.width = viewImage.getAttribute('width');\n }\n return value;\n }\n }\n }).add(viewFigureToModel());\n // Register imageUpload command.\n editor.commands.add('imageInsert', new ImageInsertCommand(editor));\n }\n}\n// Creates a view element representing the image.\n//\n//\t\t<figure class=\"image\"><img></img></figure>\n//\n// Note that `alt` and `src` attributes are converted separately, so they are not included.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/containerelement~ContainerElement}\nexport function createImageViewElement(writer) {\n const emptyElement = writer.createEmptyElement('img');\n const figure = writer.createContainerElement('figure', { class: 'image' });\n writer.insert(writer.createPositionAt(figure, 0), emptyElement);\n return figure;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/findlinkrange\n */\n\n/**\n * Returns a range containing the entire link in which the given `position` is placed.\n *\n * It can be used e.g. to get the entire range on which the `linkHref` attribute needs to be changed when having a\n * selection inside a link.\n *\n * @param {module:engine/model/position~Position} position The start position.\n * @param {String} value The `linkHref` attribute value.\n * @returns {module:engine/model/range~Range} The link range.\n */\nexport default function findLinkRange( position, value, model ) {\n\treturn model.createRange( _findBound( position, value, true, model ), _findBound( position, value, false, model ) );\n}\n\n// Walks forward or backward (depends on the `lookBack` flag), node by node, as long as they have the same `linkHref` attribute value\n// and returns a position just before or after (depends on the `lookBack` flag) the last matched node.\n//\n// @param {module:engine/model/position~Position} position The start position.\n// @param {String} value The `linkHref` attribute value.\n// @param {Boolean} lookBack Whether the walk direction is forward (`false`) or backward (`true`).\n// @returns {module:engine/model/position~Position} The position just before the last matched node.\nfunction _findBound( position, value, lookBack, model ) {\n\t// Get node before or after position (depends on `lookBack` flag).\n\t// When position is inside text node then start searching from text node.\n\tlet node = position.textNode || ( lookBack ? position.nodeBefore : position.nodeAfter );\n\n\tlet lastNode = null;\n\n\twhile ( node && node.getAttribute( 'linkHref' ) == value ) {\n\t\tlastNode = node;\n\t\tnode = lookBack ? node.previousSibling : node.nextSibling;\n\t}\n\n\treturn lastNode ? model.createPositionAt( lastNode, lookBack ? 'before' : 'after' ) : position;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/linkcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport findLinkRange from './findlinkrange';\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\n\n/**\n * The link command. It is used by the {@link module:link/link~Link link feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class LinkCommand extends Command {\n\t/**\n\t * The value of the `'linkHref'` attribute if the start of the selection is located in a node with this attribute.\n\t *\n\t * @observable\n\t * @readonly\n\t * @member {Object|undefined} #value\n\t */\n\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * A collection of {@link module:link/utils~ManualDecorator manual decorators}\n\t\t * corresponding to the {@link module:link/link~LinkConfig#decorators decorator configuration}.\n\t\t *\n\t\t * You can consider it a model with states of manual decorators added to the currently selected link.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis.manualDecorators = new Collection();\n\t}\n\n\t/**\n\t * Synchronizes the state of {@link #manualDecorators} with the currently present elements in the model.\n\t */\n\trestoreManualDecoratorStates() {\n\t\tfor ( const manualDecorator of this.manualDecorators ) {\n\t\t\tmanualDecorator.value = this._getDecoratorStateFromModel( manualDecorator.id );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.value = doc.selection.getAttribute( 'linkHref' );\n\n\t\tfor ( const manualDecorator of this.manualDecorators ) {\n\t\t\tmanualDecorator.value = this._getDecoratorStateFromModel( manualDecorator.id );\n\t\t}\n\n\t\tthis.isEnabled = model.schema.checkAttributeInSelection( doc.selection, 'linkHref' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is non-collapsed, the `linkHref` attribute will be applied to nodes inside the selection, but only to\n\t * those nodes where the `linkHref` attribute is allowed (disallowed nodes will be omitted).\n\t *\n\t * When the selection is collapsed and is not inside the text with the `linkHref` attribute, a\n\t * new {@link module:engine/model/text~Text text node} with the `linkHref` attribute will be inserted in place of the caret, but\n\t * only if such element is allowed in this place. The `_data` of the inserted text will equal the `href` parameter.\n\t * The selection will be updated to wrap the just inserted text node.\n\t *\n\t * When the selection is collapsed and inside the text with the `linkHref` attribute, the attribute value will be updated.\n\t *\n\t * # Decorators and model attribute management\n\t *\n\t * There is an optional argument to this command that applies or removes model\n\t * {@glink framework/guides/architecture/editing-engine#text-attributes text attributes} brought by\n\t * {@link module:link/utils~ManualDecorator manual link decorators}.\n\t *\n\t * Text attribute names in the model correspond to the entries in the {@link module:link/link~LinkConfig#decorators configuration}.\n\t * For every decorator configured, a model text attribute exists with the \"link\" prefix. For example, a `'linkMyDecorator'` attribute\n\t * corresponds to `'myDecorator'` in the configuration.\n\t *\n\t * To learn more about link decorators, check out the {@link module:link/link~LinkConfig#decorators `config.link.decorators`}\n\t * documentation.\n\t *\n\t * Here is how to manage decorator attributes with the link command:\n\t *\n\t *\t\tconst linkCommand = editor.commands.get( 'link' );\n\t *\n\t *\t\t// Adding a new decorator attribute.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: true\n\t *\t\t} );\n\t *\n\t *\t\t// Removing a decorator attribute from the selection.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: false\n\t *\t\t} );\n\t *\n\t *\t\t// Adding multiple decorator attributes at the same time.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: true,\n\t *\t\t\tlinkIsDownloadable: true,\n\t *\t\t} );\n\t *\n\t *\t\t// Removing and adding decorator attributes at the same time.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: false,\n\t *\t\t\tlinkFoo: true,\n\t *\t\t\tlinkIsDownloadable: false,\n\t *\t\t} );\n\t *\n\t * **Note**: If the decorator attribute name is not specified, its state remains untouched.\n\t *\n\t * **Note**: {@link module:link/unlinkcommand~UnlinkCommand#execute `UnlinkCommand#execute()`} removes all\n\t * decorator attributes.\n\t *\n\t * @fires execute\n\t * @param {String} href Link destination.\n\t * @param {Object} [manualDecoratorIds={}] The information about manual decorator attributes to be applied or removed upon execution.\n\t */\n\texecute( href, manualDecoratorIds = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\t// Stores information about manual decorators to turn them on/off when command is applied.\n\t\tconst truthyManualDecorators = [];\n\t\tconst falsyManualDecorators = [];\n\n\t\tfor ( const name in manualDecoratorIds ) {\n\t\t\tif ( manualDecoratorIds[ name ] ) {\n\t\t\t\ttruthyManualDecorators.push( name );\n\t\t\t} else {\n\t\t\t\tfalsyManualDecorators.push( name );\n\t\t\t}\n\t\t}\n\n\t\tmodel.change( writer => {\n\t\t\t// If selection is collapsed then update selected link or insert new one at the place of caret.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tconst position = selection.getFirstPosition();\n\n\t\t\t\t// When selection is inside text with `linkHref` attribute.\n\t\t\t\tif ( selection.hasAttribute( 'linkHref' ) ) {\n\t\t\t\t\t// Then update `linkHref` value.\n\t\t\t\t\tconst linkRange = findLinkRange( position, selection.getAttribute( 'linkHref' ), model );\n\n\t\t\t\t\twriter.setAttribute( 'linkHref', href, linkRange );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.setAttribute( item, true, linkRange );\n\t\t\t\t\t} );\n\n\t\t\t\t\tfalsyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.removeAttribute( item, linkRange );\n\t\t\t\t\t} );\n\n\t\t\t\t\t// Create new range wrapping changed link.\n\t\t\t\t\twriter.setSelection( linkRange );\n\t\t\t\t}\n\t\t\t\t// If not then insert text node with `linkHref` attribute in place of caret.\n\t\t\t\t// However, since selection in collapsed, attribute value will be used as data for text node.\n\t\t\t\t// So, if `href` is empty, do not create text node.\n\t\t\t\telse if ( href !== '' ) {\n\t\t\t\t\tconst attributes = toMap( selection.getAttributes() );\n\n\t\t\t\t\tattributes.set( 'linkHref', href );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\tattributes.set( item, true );\n\t\t\t\t\t} );\n\n\t\t\t\t\tconst node = writer.createText( href, attributes );\n\n\t\t\t\t\tmodel.insertContent( node, position );\n\n\t\t\t\t\t// Create new range wrapping created node.\n\t\t\t\t\twriter.setSelection( writer.createRangeOn( node ) );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// If selection has non-collapsed ranges, we change attribute on nodes inside those ranges\n\t\t\t\t// omitting nodes where `linkHref` attribute is disallowed.\n\t\t\t\tconst ranges = model.schema.getValidRanges( selection.getRanges(), 'linkHref' );\n\n\t\t\t\tfor ( const range of ranges ) {\n\t\t\t\t\twriter.setAttribute( 'linkHref', href, range );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.setAttribute( item, true, range );\n\t\t\t\t\t} );\n\n\t\t\t\t\tfalsyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.removeAttribute( item, range );\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Provides information whether a decorator with a given name is present in the currently processed selection.\n\t *\n\t * @private\n\t * @param {String} decoratorName The name of the manual decorator used in the model\n\t * @returns {Boolean} The information whether a given decorator is currently present in the selection.\n\t */\n\t_getDecoratorStateFromModel( decoratorName ) {\n\t\tconst doc = this.editor.model.document;\n\t\treturn doc.selection.getAttribute( decoratorName ) || false;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/unlinkcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport findLinkRange from './findlinkrange';\n\n/**\n * The unlink command. It is used by the {@link module:link/link~Link link plugin}.\n *\n * @extends module:core/command~Command\n */\nexport default class UnlinkCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this.editor.model.document.selection.hasAttribute( 'linkHref' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is collapsed, it removes the `linkHref` attribute from each node with the same `linkHref` attribute value.\n\t * When the selection is non-collapsed, it removes the `linkHref` attribute from each node in selected ranges.\n\t *\n\t * # Decorators\n\t *\n\t * If {@link module:link/link~LinkConfig#decorators `config.link.decorators`} is specified,\n\t * all configured decorators are removed together with the `linkHref` attribute.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst linkCommand = editor.commands.get( 'link' );\n\n\t\tmodel.change( writer => {\n\t\t\t// Get ranges to unlink.\n\t\t\tconst rangesToUnlink = selection.isCollapsed ?\n\t\t\t\t[ findLinkRange( selection.getFirstPosition(), selection.getAttribute( 'linkHref' ), model ) ] : selection.getRanges();\n\n\t\t\t// Remove `linkHref` attribute from specified ranges.\n\t\t\tfor ( const range of rangesToUnlink ) {\n\t\t\t\twriter.removeAttribute( 'linkHref', range );\n\t\t\t\t// If there are registered custom attributes, then remove them during unlink.\n\t\t\t\tif ( linkCommand ) {\n\t\t\t\t\tfor ( const manualDecorator of linkCommand.manualDecorators ) {\n\t\t\t\t\t\twriter.removeAttribute( manualDecorator.id, range );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n","import baseSlice from './_baseSlice.js';\n\n/**\n * Casts `array` to a slice if it's needed.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {number} start The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the cast slice.\n */\nfunction castSlice(array, start, end) {\n var length = array.length;\n end = end === undefined ? length : end;\n return (!start && end >= length) ? array : baseSlice(array, start, end);\n}\n\nexport default castSlice;\n","/**\n * The base implementation of `_.slice` without an iteratee call guard.\n *\n * @private\n * @param {Array} array The array to slice.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the slice of `array`.\n */\nfunction baseSlice(array, start, end) {\n var index = -1,\n length = array.length;\n\n if (start < 0) {\n start = -start > length ? 0 : (length + start);\n }\n end = end > length ? length : end;\n if (end < 0) {\n end += length;\n }\n length = start > end ? 0 : ((end - start) >>> 0);\n start >>>= 0;\n\n var result = Array(length);\n while (++index < length) {\n result[index] = array[index + start];\n }\n return result;\n}\n\nexport default baseSlice;\n","/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff',\n rsComboMarksRange = '\\\\u0300-\\\\u036f',\n reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n rsVarRange = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsZWJ = '\\\\u200d';\n\n/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */\nvar reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');\n\n/**\n * Checks if `string` contains Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a symbol is found, else `false`.\n */\nfunction hasUnicode(string) {\n return reHasUnicode.test(string);\n}\n\nexport default hasUnicode;\n","/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff',\n rsComboMarksRange = '\\\\u0300-\\\\u036f',\n reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n rsVarRange = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsAstral = '[' + rsAstralRange + ']',\n rsCombo = '[' + rsComboRange + ']',\n rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]',\n rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',\n rsNonAstral = '[^' + rsAstralRange + ']',\n rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}',\n rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]',\n rsZWJ = '\\\\u200d';\n\n/** Used to compose unicode regexes. */\nvar reOptMod = rsModifier + '?',\n rsOptVar = '[' + rsVarRange + ']?',\n rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',\n rsSeq = rsOptVar + reOptMod + rsOptJoin,\n rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';\n\n/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */\nvar reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');\n\n/**\n * Converts a Unicode `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction unicodeToArray(string) {\n return string.match(reUnicode) || [];\n}\n\nexport default unicodeToArray;\n","import asciiToArray from './_asciiToArray.js';\nimport hasUnicode from './_hasUnicode.js';\nimport unicodeToArray from './_unicodeToArray.js';\n\n/**\n * Converts `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction stringToArray(string) {\n return hasUnicode(string)\n ? unicodeToArray(string)\n : asciiToArray(string);\n}\n\nexport default stringToArray;\n","/**\n * Converts an ASCII `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction asciiToArray(string) {\n return string.split('');\n}\n\nexport default asciiToArray;\n","import Symbol from './_Symbol.js';\nimport arrayMap from './_arrayMap.js';\nimport isArray from './isArray.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar INFINITY = 1 / 0;\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n/**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\nfunction baseToString(value) {\n // Exit early for strings to avoid a performance hit in some environments.\n if (typeof value == 'string') {\n return value;\n }\n if (isArray(value)) {\n // Recursively convert values (susceptible to call stack limits).\n return arrayMap(value, baseToString) + '';\n }\n if (isSymbol(value)) {\n return symbolToString ? symbolToString.call(value) : '';\n }\n var result = (value + '');\n return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\nexport default baseToString;\n","/**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\nfunction arrayMap(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length,\n result = Array(length);\n\n while (++index < length) {\n result[index] = iteratee(array[index], index, array);\n }\n return result;\n}\n\nexport default arrayMap;\n","import createCaseFirst from './_createCaseFirst.js';\n\n/**\n * Converts the first character of `string` to upper case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.upperFirst('fred');\n * // => 'Fred'\n *\n * _.upperFirst('FRED');\n * // => 'FRED'\n */\nvar upperFirst = createCaseFirst('toUpperCase');\n\nexport default upperFirst;\n","import castSlice from './_castSlice.js';\nimport hasUnicode from './_hasUnicode.js';\nimport stringToArray from './_stringToArray.js';\nimport toString from './toString.js';\n\n/**\n * Creates a function like `_.lowerFirst`.\n *\n * @private\n * @param {string} methodName The name of the `String` case method to use.\n * @returns {Function} Returns the new case function.\n */\nfunction createCaseFirst(methodName) {\n return function(string) {\n string = toString(string);\n\n var strSymbols = hasUnicode(string)\n ? stringToArray(string)\n : undefined;\n\n var chr = strSymbols\n ? strSymbols[0]\n : string.charAt(0);\n\n var trailing = strSymbols\n ? castSlice(strSymbols, 1).join('')\n : string.slice(1);\n\n return chr[methodName]() + trailing;\n };\n}\n\nexport default createCaseFirst;\n","import baseToString from './_baseToString.js';\n\n/**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\nfunction toString(value) {\n return value == null ? '' : baseToString(value);\n}\n\nexport default toString;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/utils\n */\nimport { upperFirst } from 'lodash-es';\nconst ATTRIBUTE_WHITESPACES = /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205f\\u3000]/g;\n// eslint-disable-line no-control-regex\nconst SAFE_URL = /^(?:(?:https?|ftps?|mailto):|[^a-z]|[a-z+.-]+(?:[^a-z+.:-]|$))/i;\n/**\n * Returns `true` if a given view node is the link element.\n *\n * @param {module:engine/view/node~Node} node\n * @returns {Boolean}\n */\nexport function isLinkElement(node) {\n return node.is('attributeElement') && !!node.getCustomProperty('link');\n}\n/**\n * Creates link {@link module:engine/view/attributeelement~AttributeElement} with the provided `href` attribute.\n *\n * @param {String} href\n * @returns {module:engine/view/attributeelement~AttributeElement}\n */\nexport function createLinkElement(href, writer) {\n // Priority 5 - https://github.com/ckeditor/ckeditor5-link/issues/121.\n const linkElement = writer.createAttributeElement('a', { href }, { priority: 5 });\n writer.setCustomProperty('link', true, linkElement);\n return linkElement;\n}\n/**\n * Returns a safe URL based on a given value.\n *\n * A URL is considered safe if it is safe for the user (does not contain any malicious code).\n *\n * If a URL is considered unsafe, a simple `\"#\"` is returned.\n *\n * @protected\n * @param {*} url\n * @returns {String} Safe URL.\n */\nexport function ensureSafeUrl(url) {\n url = String(url);\n return isSafeUrl(url) ? url : '#';\n}\n// Checks whether the given URL is safe for the user (does not contain any malicious code).\n//\n// @param {String} url URL to check.\nfunction isSafeUrl(url) {\n const normalizedUrl = url.replace(ATTRIBUTE_WHITESPACES, '');\n return normalizedUrl.match(SAFE_URL);\n}\n/**\n * Returns the {@link module:link/link~LinkConfig#decorators `config.link.decorators`} configuration processed\n * to respect the locale of the editor, i.e. to display the {@link module:link/link~LinkDecoratorManualDefinition label}\n * in the correct language.\n *\n * **Note**: Only the few most commonly used labels are translated automatically. Other labels should be manually\n * translated in the {@link module:link/link~LinkConfig#decorators `config.link.decorators`} configuration.\n *\n * @param {module:utils/locale~Locale#t} t shorthand for {@link module:utils/locale~Locale#t Locale#t}\n * @param {Array.<module:link/link~LinkDecoratorDefinition>} The decorator reference\n * where the label values should be localized.\n * @returns {Array.<module:link/link~LinkDecoratorDefinition>}\n */\nexport function getLocalizedDecorators(t, decorators) {\n const localizedDecoratorsLabels = {\n 'Open in a new tab': t('az'),\n 'Downloadable': t('ba')\n };\n decorators.forEach(decorator => {\n if (decorator.label && localizedDecoratorsLabels[decorator.label]) {\n decorator.label = localizedDecoratorsLabels[decorator.label];\n }\n return decorator;\n });\n return decorators;\n}\n/**\n * Converts an object with defined decorators to a normalized array of decorators. The `id` key is added for each decorator and\n * is used as the attribute's name in the model.\n *\n * @param {Object.<String, module:link/link~LinkDecoratorDefinition>} decorators\n * @returns {Array.<module:link/link~LinkDecoratorDefinition>}\n */\nexport function normalizeDecorators(decorators) {\n const retArray = [];\n if (decorators) {\n for (const [key, value] of Object.entries(decorators)) {\n const decorator = Object.assign({}, value, { id: `link${ upperFirst(key) }` });\n retArray.push(decorator);\n }\n }\n return retArray;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module link/utils\n */\n\n/**\n * Helper class that ties together all {@link module:link/link~LinkDecoratorAutomaticDefinition} and provides\n * a {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement downcast dispatcher} for them.\n */\nexport default class AutomaticDecorators {\n\tconstructor() {\n\t\t/**\n\t\t * Stores the definition of {@link module:link/link~LinkDecoratorAutomaticDefinition automatic decorators}.\n\t\t * This data is used as a source for a downcast dispatcher to create a proper conversion to output data.\n\t\t *\n\t\t * @private\n\t\t * @type {Set}\n\t\t */\n\t\tthis._definitions = new Set();\n\t}\n\n\t/**\n\t * Gives information about the number of decorators stored in the {@link module:link/utils~AutomaticDecorators} instance.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._definitions.size;\n\t}\n\n\t/**\n\t * Adds automatic decorator objects or an array with them to be used during downcasting.\n\t *\n\t * @param {module:link/link~LinkDecoratorAutomaticDefinition|Array.<module:link/link~LinkDecoratorAutomaticDefinition>} item\n\t * A configuration object of automatic rules for decorating links. It might also be an array of such objects.\n\t */\n\tadd( item ) {\n\t\tif ( Array.isArray( item ) ) {\n\t\t\titem.forEach( item => this._definitions.add( item ) );\n\t\t} else {\n\t\t\tthis._definitions.add( item );\n\t\t}\n\t}\n\n\t/**\n\t * Provides the conversion helper used in the {@link module:engine/conversion/downcasthelpers~DowncastHelpers#add} method.\n\t *\n\t * @returns {Function} A dispatcher function used as conversion helper\n\t * in {@link module:engine/conversion/downcasthelpers~DowncastHelpers#add}.\n\t */\n\tgetDispatcher() {\n\t\treturn dispatcher => {\n\t\t\tdispatcher.on( 'attribute:linkHref', ( evt, data, conversionApi ) => {\n\t\t\t\t// There is only test as this behavior decorates links and\n\t\t\t\t// it is run before dispatcher which actually consumes this node.\n\t\t\t\t// This allows on writing own dispatcher with highest priority,\n\t\t\t\t// which blocks both native converter and this additional decoration.\n\t\t\t\tif ( !conversionApi.consumable.test( data.item, 'attribute:linkHref' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\tconst viewWriter = conversionApi.writer;\n\t\t\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\t\t\tfor ( const item of this._definitions ) {\n\t\t\t\t\tconst viewElement = viewWriter.createAttributeElement( 'a', item.attributes, {\n\t\t\t\t\t\tpriority: 5\n\t\t\t\t\t} );\n\t\t\t\t\tviewWriter.setCustomProperty( 'link', true, viewElement );\n\t\t\t\t\tif ( item.callback( data.attributeNewValue ) ) {\n\t\t\t\t\t\tif ( data.item.is( 'selection' ) ) {\n\t\t\t\t\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), viewElement );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tviewWriter.wrap( conversionApi.mapper.toViewRange( data.range ), viewElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t} else {\n\t\t\t\t\t\tviewWriter.unwrap( conversionApi.mapper.toViewRange( data.range ), viewElement );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}, { priority: 'high' } );\n\t\t};\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/utils\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Helper class that stores manual decorators with observable {@link module:link/utils~ManualDecorator#value}\n * to support integration with the UI state. An instance of this class is a model with the state of individual manual decorators.\n * These decorators are kept as collections in {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class ManualDecorator {\n\t/**\n\t * Creates a new instance of {@link module:link/utils~ManualDecorator}.\n\t *\n\t * @param {Object} config\n\t * @param {String} config.id The name of the attribute used in the model that represents a given manual decorator.\n\t * For example: `'linkIsExternal'`.\n\t * @param {String} config.label The label used in the user interface to toggle the manual decorator.\n\t * @param {Object} config.attributes A set of attributes added to output data when the decorator is active for a specific link.\n\t * Attributes should keep the format of attributes defined in {@link module:engine/view/elementdefinition~ElementDefinition}.\n\t */\n\tconstructor( { id, label, attributes } ) {\n\t\t/**\n\t\t * An ID of a manual decorator which is the name of the attribute in the model, for example: 'linkManualDecorator0'.\n\t\t *\n\t\t * @type {String}\n\t\t */\n\t\tthis.id = id;\n\n\t\t/**\n\t\t * The value of the current manual decorator. It reflects its state from the UI.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} module:link/utils~ManualDecorator#value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * The label used in the user interface to toggle the manual decorator.\n\t\t *\n\t\t * @type {String}\n\t\t */\n\t\tthis.label = label;\n\n\t\t/**\n\t\t * A set of attributes added to downcasted data when the decorator is activated for a specific link.\n\t\t * Attributes should be added in a form of attributes defined in {@link module:engine/view/elementdefinition~ElementDefinition}.\n\t\t *\n\t\t * @type {Object}\n\t\t */\n\t\tthis.attributes = attributes;\n\t}\n}\n\nmix( ManualDecorator, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/utils/bindtwostepcarettoattribute\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport priorities from '@ckeditor/ckeditor5-utils/src/priorities';\n\n/**\n * This helper enables the two-step caret (phantom) movement behavior for the given {@link module:engine/model/model~Model}\n * attribute on arrow right (<kbd>→</kbd>) and left (<kbd>←</kbd>) key press.\n *\n * Thanks to this (phantom) caret movement the user is able to type before/after as well as at the\n * beginning/end of an attribute.\n *\n * **Note:** This helper support right–to–left (Arabic, Hebrew, etc.) content by mirroring its behavior\n * but for the sake of simplicity examples showcase only left–to–right use–cases.\n *\n * # Forward movement\n *\n * ## \"Entering\" an attribute:\n *\n * When this behavior is enabled for the `a` attribute and the selection is right before it\n * (at the attribute boundary), pressing the right arrow key will not move the selection but update its\n * attributes accordingly:\n *\n * * When enabled:\n *\n * \t\tfoo{}<$text a=\"true\">bar</$text>\n *\n * <kbd>→</kbd>\n *\n * \t\tfoo<$text a=\"true\">{}bar</$text>\n *\n * * When disabled:\n *\n * \t\tfoo{}<$text a=\"true\">bar</$text>\n *\n * <kbd>→</kbd>\n *\n * \t\tfoo<$text a=\"true\">b{}ar</$text>\n *\n *\n * ## \"Leaving\" an attribute:\n *\n * * When enabled:\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * <kbd>→</kbd>\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * * When disabled:\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * <kbd>→</kbd>\n *\n * \t\t<$text a=\"true\">bar</$text>b{}az\n *\n * # Backward movement\n *\n * * When enabled:\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * <kbd>←</kbd>\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * * When disabled:\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * <kbd>←</kbd>\n *\n * \t\t<$text a=\"true\">ba{}r</$text>b{}az\n *\n * @param {Object} options Helper options.\n * @param {module:engine/view/view~View} options.view View controller instance.\n * @param {module:engine/model/model~Model} options.model Data model instance.\n * @param {module:utils/dom/emittermixin~Emitter} options.emitter The emitter to which this behavior should be added\n * (e.g. a plugin instance).\n * @param {String} options.attribute Attribute for which this behavior will be added.\n * @param {module:utils/locale~Locale} options.locale The {@link module:core/editor/editor~Editor#locale} instance.\n */\nexport default function bindTwoStepCaretToAttribute( { view, model, emitter, attribute, locale } ) {\n\tconst twoStepCaretHandler = new TwoStepCaretHandler( model, emitter, attribute );\n\tconst modelSelection = model.document.selection;\n\n\t// Listen to keyboard events and handle the caret movement according to the 2-step caret logic.\n\t//\n\t// Note: This listener has the \"high+1\" priority:\n\t// * \"high\" because of the filler logic implemented in the renderer which also engages on #keydown.\n\t// When the gravity is overridden the attributes of the (model) selection attributes are reset.\n\t// It may end up with the filler kicking in and breaking the selection.\n\t// * \"+1\" because we would like to avoid collisions with other features (like Widgets), which\n\t// take over the keydown events with the \"high\" priority. Two-step caret movement takes precedence\n\t// over Widgets in that matter.\n\t//\n\t// Find out more in https://github.com/ckeditor/ckeditor5-engine/issues/1301.\n\temitter.listenTo( view.document, 'keydown', ( evt, data ) => {\n\t\t// This implementation works only for collapsed selection.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// When user tries to expand the selection or jump over the whole word or to the beginning/end then\n\t\t// two-steps movement is not necessary.\n\t\tif ( data.shiftKey || data.altKey || data.ctrlKey ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst arrowRightPressed = data.keyCode == keyCodes.arrowright;\n\t\tconst arrowLeftPressed = data.keyCode == keyCodes.arrowleft;\n\n\t\t// When neither left or right arrow has been pressed then do noting.\n\t\tif ( !arrowRightPressed && !arrowLeftPressed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = modelSelection.getFirstPosition();\n\t\tconst contentDirection = locale.contentLanguageDirection;\n\t\tlet isMovementHandled;\n\n\t\tif ( ( contentDirection === 'ltr' && arrowRightPressed ) || ( contentDirection === 'rtl' && arrowLeftPressed ) ) {\n\t\t\tisMovementHandled = twoStepCaretHandler.handleForwardMovement( position, data );\n\t\t} else {\n\t\t\tisMovementHandled = twoStepCaretHandler.handleBackwardMovement( position, data );\n\t\t}\n\n\t\t// Stop the keydown event if the two-step caret movement handled it. Avoid collisions\n\t\t// with other features which may also take over the caret movement (e.g. Widget).\n\t\tif ( isMovementHandled ) {\n\t\t\tevt.stop();\n\t\t}\n\t}, { priority: priorities.get( 'high' ) + 1 } );\n}\n\n/**\n * This is a protected helper–class for {@link module:engine/utils/bindtwostepcarettoattribute}.\n * It handles the state of the 2-step caret movement for a single {@link module:engine/model/model~Model}\n * attribute upon the `keypress` in the {@link module:engine/view/view~View}.\n *\n * @protected\n */\nexport class TwoStepCaretHandler {\n\t/*\n\t * Creates two step handler instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Data model instance.\n\t * @param {module:utils/dom/emittermixin~Emitter} emitter The emitter to which this behavior should be added\n\t * (e.g. a plugin instance).\n\t * @param {String} attribute Attribute for which the behavior will be added.\n\t */\n\tconstructor( model, emitter, attribute ) {\n\t\t/**\n\t\t * The model instance this class instance operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model#schema}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The Attribute this class instance operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.attribute = attribute;\n\n\t\t/**\n\t\t * A reference to the document selection.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/selection~Selection}\n\t\t */\n\t\tthis._modelSelection = model.document.selection;\n\n\t\t/**\n\t\t * The current UID of the overridden gravity, as returned by\n\t\t * {@link module:engine/model/writer~Writer#overrideSelectionGravity}.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._overrideUid = null;\n\n\t\t/**\n\t\t * A flag indicating that the automatic gravity restoration for this attribute\n\t\t * should not happen upon the next\n\t\t * {@link module:engine/model/selection~Selection#event:change:range} event.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._isNextGravityRestorationSkipped = false;\n\n\t\t// The automatic gravity restoration logic.\n\t\temitter.listenTo( this._modelSelection, 'change:range', ( evt, data ) => {\n\t\t\t// Skipping the automatic restoration is needed if the selection should change\n\t\t\t// but the gravity must remain overridden afterwards. See the #handleBackwardMovement\n\t\t\t// to learn more.\n\t\t\tif ( this._isNextGravityRestorationSkipped ) {\n\t\t\t\tthis._isNextGravityRestorationSkipped = false;\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip automatic restore when the gravity is not overridden — simply, there's nothing to restore\n\t\t\t// at this moment.\n\t\t\tif ( !this._isGravityOverridden ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip automatic restore when the change is indirect AND the selection is at the attribute boundary.\n\t\t\t// It means that e.g. if the change was external (collaboration) and the user had their\n\t\t\t// selection around the link, its gravity should remain intact in this change:range event.\n\t\t\tif ( !data.directChange && isAtBoundary( this._modelSelection.getFirstPosition(), attribute ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis._restoreGravity();\n\t\t} );\n\t}\n\n\t/**\n\t * Updates the document selection and the view according to the two–step caret movement state\n\t * when moving **forwards**. Executed upon `keypress` in the {@link module:engine/view/view~View}.\n\t *\n\t * @param {module:engine/model/position~Position} position The model position at the moment of the key press.\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} data Data of the key press.\n\t * @returns {Boolean} `true` when the handler prevented caret movement\n\t */\n\thandleForwardMovement( position, data ) {\n\t\tconst attribute = this.attribute;\n\n\t\t// DON'T ENGAGE 2-SCM if gravity is already overridden. It means that we just entered\n\t\t//\n\t\t// \t\t<paragraph>foo<$text attribute>{}bar</$text>baz</paragraph>\n\t\t//\n\t\t// or left the attribute\n\t\t//\n\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>{}baz</paragraph>\n\t\t//\n\t\t// and the gravity will be restored automatically.\n\t\tif ( this._isGravityOverridden ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// DON'T ENGAGE 2-SCM when the selection is at the beginning of the block AND already has the\n\t\t// attribute:\n\t\t// * when the selection was initially set there using the mouse,\n\t\t// * when the editor has just started\n\t\t//\n\t\t//\t\t<paragraph><$text attribute>{}bar</$text>baz</paragraph>\n\t\t//\n\t\tif ( position.isAtStart && this._hasSelectionAttribute ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when about to leave one attribute value and enter another:\n\t\t//\n\t\t// \t\t<paragraph><$text attribute=\"1\">foo{}</$text><$text attribute=\"2\">bar</$text></paragraph>\n\t\t//\n\t\t// but DON'T when already in between of them (no attribute selection):\n\t\t//\n\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t//\n\t\tif ( isBetweenDifferentValues( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._removeSelectionAttribute();\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when entering an attribute:\n\t\t//\n\t\t// \t\t<paragraph>foo{}<$text attribute>bar</$text>baz</paragraph>\n\t\t//\n\t\tif ( isAtStartBoundary( position, attribute ) ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._overrideGravity();\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when leaving an attribute:\n\t\t//\n\t\t//\t\t<paragraph>foo<$text attribute>bar{}</$text>baz</paragraph>\n\t\t//\n\t\tif ( isAtEndBoundary( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._overrideGravity();\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Updates the document selection and the view according to the two–step caret movement state\n\t * when moving **backwards**. Executed upon `keypress` in the {@link module:engine/view/view~View}.\n\t *\n\t * @param {module:engine/model/position~Position} position The model position at the moment of the key press.\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} data Data of the key press.\n\t * @returns {Boolean} `true` when the handler prevented caret movement\n\t */\n\thandleBackwardMovement( position, data ) {\n\t\tconst attribute = this.attribute;\n\n\t\t// When the gravity is already overridden...\n\t\tif ( this._isGravityOverridden ) {\n\t\t\t// ENGAGE 2-SCM & REMOVE SELECTION ATTRIBUTE\n\t\t\t// when about to leave one attribute value and enter another:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text><$text attribute=\"2\">{}bar</$text></paragraph>\n\t\t\t//\n\t\t\t// but DON'T when already in between of them (no attribute selection):\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( isBetweenDifferentValues( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._restoreGravity();\n\t\t\t\tthis._removeSelectionAttribute();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// ENGAGE 2-SCM when at any boundary of the attribute:\n\t\t\t//\n\t\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>{}baz</paragraph>\n\t\t\t// \t\t<paragraph>foo<$text attribute>{}bar</$text>baz</paragraph>\n\t\t\t//\n\t\t\telse {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._restoreGravity();\n\n\t\t\t\t// REMOVE SELECTION ATRIBUTE at the beginning of the block.\n\t\t\t\t// It's like restoring gravity but towards a non-existent content when\n\t\t\t\t// the gravity is overridden:\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>{}bar</$text></paragraph>\n\t\t\t\t//\n\t\t\t\t// becomes:\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph>{}<$text attribute>bar</$text></paragraph>\n\t\t\t\t//\n\t\t\t\tif ( position.isAtStart ) {\n\t\t\t\t\tthis._removeSelectionAttribute();\n\t\t\t\t}\n\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} else {\n\t\t\t// ENGAGE 2-SCM when between two different attribute values but selection has no attribute:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( isBetweenDifferentValues( position, attribute ) && !this._hasSelectionAttribute ) {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._setSelectionAttributeFromTheNodeBefore( position );\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// End of block boundary cases:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute>bar{}</$text></paragraph>\n\t\t\t// \t\t<paragraph><$text attribute>bar</$text>{}</paragraph>\n\t\t\t//\n\t\t\tif ( position.isAtEnd && isAtEndBoundary( position, attribute ) ) {\n\t\t\t\t// DON'T ENGAGE 2-SCM if the selection has the attribute already.\n\t\t\t\t// This is a common selection if set using the mouse.\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>bar{}</$text></paragraph>\n\t\t\t\t//\n\t\t\t\tif ( this._hasSelectionAttribute ) {\n\t\t\t\t\t// DON'T ENGAGE 2-SCM if the attribute at the end of the block which has length == 1.\n\t\t\t\t\t// Make sure the selection will not the attribute after it moves backwards.\n\t\t\t\t\t//\n\t\t\t\t\t// \t\t<paragraph>foo<$text attribute>b{}</$text></paragraph>\n\t\t\t\t\t//\n\t\t\t\t\tif ( isStepAfterTheAttributeBoundary( position, attribute ) ) {\n\t\t\t\t\t\t// Skip the automatic gravity restore upon the next selection#change:range event.\n\t\t\t\t\t\t// If not skipped, it would automatically restore the gravity, which should remain\n\t\t\t\t\t\t// overridden.\n\t\t\t\t\t\tthis._skipNextAutomaticGravityRestoration();\n\t\t\t\t\t\tthis._overrideGravity();\n\n\t\t\t\t\t\t// Don't return \"true\" here because we didn't call _preventCaretMovement.\n\t\t\t\t\t\t// Returning here will destabilize the filler logic, which also listens to\n\t\t\t\t\t\t// keydown (and the event would be stopped).\n\t\t\t\t\t}\n\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\t// ENGAGE 2-SCM if the selection has no attribute. This may happen when the user\n\t\t\t\t// left the attribute using a FORWARD 2-SCM.\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>bar</$text>{}</paragraph>\n\t\t\t\t//\n\t\t\t\telse {\n\t\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\t\tthis._setSelectionAttributeFromTheNodeBefore( position );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// REMOVE SELECTION ATRIBUTE when restoring gravity towards a non-existent content at the\n\t\t\t// beginning of the block.\n\t\t\t//\n\t\t\t// \t\t<paragraph>{}<$text attribute>bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( position.isAtStart ) {\n\t\t\t\tif ( this._hasSelectionAttribute ) {\n\t\t\t\t\tthis._removeSelectionAttribute();\n\t\t\t\t\tthis._preventCaretMovement( data );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// DON'T ENGAGE 2-SCM when about to enter of leave an attribute.\n\t\t\t// We need to check if the caret is a one position before the attribute boundary:\n\t\t\t//\n\t\t\t// \t\t<paragraph>foo<$text attribute>b{}ar</$text>baz</paragraph>\n\t\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>b{}az</paragraph>\n\t\t\t//\n\t\t\tif ( isStepAfterTheAttributeBoundary( position, attribute ) ) {\n\t\t\t\t// Skip the automatic gravity restore upon the next selection#change:range event.\n\t\t\t\t// If not skipped, it would automatically restore the gravity, which should remain\n\t\t\t\t// overridden.\n\t\t\t\tthis._skipNextAutomaticGravityRestoration();\n\t\t\t\tthis._overrideGravity();\n\n\t\t\t\t// Don't return \"true\" here because we didn't call _preventCaretMovement.\n\t\t\t\t// Returning here will destabilize the filler logic, which also listens to\n\t\t\t\t// keydown (and the event would be stopped).\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * `true` when the gravity is overridden for the {@link #attribute}.\n\t *\n\t * @readonly\n\t * @private\n\t * @type {Boolean}\n\t */\n\tget _isGravityOverridden() {\n\t\treturn !!this._overrideUid;\n\t}\n\n\t/**\n\t * `true` when the {@link module:engine/model/selection~Selection} has the {@link #attribute}.\n\t *\n\t * @readonly\n\t * @private\n\t * @type {Boolean}\n\t */\n\tget _hasSelectionAttribute() {\n\t\treturn this._modelSelection.hasAttribute( this.attribute );\n\t}\n\n\t/**\n\t * Overrides the gravity using the {@link module:engine/model/writer~Writer model writer}\n\t * and stores the information about this fact in the {@link #_overrideUid}.\n\t *\n\t * A shorthand for {@link module:engine/model/writer~Writer#overrideSelectionGravity}.\n\t *\n\t * @private\n\t */\n\t_overrideGravity() {\n\t\tthis._overrideUid = this.model.change( writer => writer.overrideSelectionGravity() );\n\t}\n\n\t/**\n\t * Restores the gravity using the {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * A shorthand for {@link module:engine/model/writer~Writer#restoreSelectionGravity}.\n\t *\n\t * @private\n\t */\n\t_restoreGravity() {\n\t\tthis.model.change( writer => {\n\t\t\twriter.restoreSelectionGravity( this._overrideUid );\n\t\t\tthis._overrideUid = null;\n\t\t} );\n\t}\n\n\t/**\n\t * Prevents the caret movement in the view by calling `preventDefault` on the event data.\n\t *\n\t * @private\n\t */\n\t_preventCaretMovement( data ) {\n\t\tdata.preventDefault();\n\t}\n\n\t/**\n\t * Removes the {@link #attribute} from the selection using using the\n\t * {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * @private\n\t */\n\t_removeSelectionAttribute() {\n\t\tthis.model.change( writer => {\n\t\t\twriter.removeSelectionAttribute( this.attribute );\n\t\t} );\n\t}\n\n\t/**\n\t * Applies the {@link #attribute} to the current selection using using the\n\t * value from the node before the current position. Uses\n\t * the {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position\n\t */\n\t_setSelectionAttributeFromTheNodeBefore( position ) {\n\t\tconst attribute = this.attribute;\n\n\t\tthis.model.change( writer => {\n\t\t\twriter.setSelectionAttribute( this.attribute, position.nodeBefore.getAttribute( attribute ) );\n\t\t} );\n\t}\n\n\t/**\n\t * Skips the next automatic selection gravity restoration upon the\n\t * {@link module:engine/model/selection~Selection#event:change:range} event.\n\t *\n\t * See {@link #_isNextGravityRestorationSkipped}.\n\t *\n\t * @private\n\t */\n\t_skipNextAutomaticGravityRestoration() {\n\t\tthis._isNextGravityRestorationSkipped = true;\n\t}\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\n// @returns {Boolean} `true` when position between the nodes sticks to the bound of text with given attribute.\nfunction isAtBoundary( position, attribute ) {\n\treturn isAtStartBoundary( position, attribute ) || isAtEndBoundary( position, attribute );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isAtStartBoundary( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\treturn isAttrAfter && ( !isAttrBefore || nodeBefore.getAttribute( attribute ) !== nodeAfter.getAttribute( attribute ) );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isAtEndBoundary( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\treturn isAttrBefore && ( !isAttrAfter || nodeBefore.getAttribute( attribute ) !== nodeAfter.getAttribute( attribute ) );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isBetweenDifferentValues( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\tif ( !isAttrAfter || !isAttrBefore ) {\n\t\treturn;\n\t}\n\n\treturn nodeAfter.getAttribute( attribute ) !== nodeBefore.getAttribute( attribute );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isStepAfterTheAttributeBoundary( position, attribute ) {\n\treturn isAtBoundary( position.getShiftedBy( -1 ), attribute );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/linkediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport LinkCommand from './linkcommand';\nimport UnlinkCommand from './unlinkcommand';\nimport { createLinkElement, ensureSafeUrl, getLocalizedDecorators, normalizeDecorators } from './utils';\nimport AutomaticDecorators from './utils/automaticdecorators';\nimport ManualDecorator from './utils/manualdecorator';\nimport bindTwoStepCaretToAttribute from '@ckeditor/ckeditor5-engine/src/utils/bindtwostepcarettoattribute';\nimport findLinkRange from './findlinkrange';\nimport '../theme/link.css';\n\nconst HIGHLIGHT_CLASS = 'ck-link_selected';\nconst DECORATOR_AUTOMATIC = 'automatic';\nconst DECORATOR_MANUAL = 'manual';\nconst EXTERNAL_LINKS_REGEXP = /^(https?:)?\\/\\//;\n\n/**\n * The link engine feature.\n *\n * It introduces the `linkHref=\"url\"` attribute in the model which renders to the view as a `<a href=\"url\">` element\n * as well as `'link'` and `'unlink'` commands.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class LinkEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'LinkEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\teditor.config.define( 'link', {\n\t\t\taddTargetToExternalLinks: false\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst locale = editor.locale;\n\n\t\t// Allow link attribute on all inline nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: 'linkHref' } );\n\n\t\teditor.conversion.for( 'dataDowncast' )\n\t\t\t.attributeToElement( { model: 'linkHref', view: createLinkElement } );\n\n\t\teditor.conversion.for( 'editingDowncast' )\n\t\t\t.attributeToElement( { model: 'linkHref', view: ( href, writer ) => {\n\t\t\t\treturn createLinkElement( ensureSafeUrl( href ), writer );\n\t\t\t} } );\n\n\t\teditor.conversion.for( 'upcast' )\n\t\t\t.elementToAttribute( {\n\t\t\t\tview: {\n\t\t\t\t\tname: 'a',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\thref: true\n\t\t\t\t\t}\n\t\t\t\t},\n\t\t\t\tmodel: {\n\t\t\t\t\tkey: 'linkHref',\n\t\t\t\t\tvalue: viewElement => viewElement.getAttribute( 'href' )\n\t\t\t\t}\n\t\t\t} );\n\n\t\t// Create linking commands.\n\t\teditor.commands.add( 'link', new LinkCommand( editor ) );\n\t\teditor.commands.add( 'unlink', new UnlinkCommand( editor ) );\n\n\t\tconst linkDecorators = getLocalizedDecorators( editor.t, normalizeDecorators( editor.config.get( 'link.decorators' ) ) );\n\n\t\tthis._enableAutomaticDecorators( linkDecorators.filter( item => item.mode === DECORATOR_AUTOMATIC ) );\n\t\tthis._enableManualDecorators( linkDecorators.filter( item => item.mode === DECORATOR_MANUAL ) );\n\n\t\t// Enable two-step caret movement for `linkHref` attribute.\n\t\tbindTwoStepCaretToAttribute( {\n\t\t\tview: editor.editing.view,\n\t\t\tmodel: editor.model,\n\t\t\temitter: this,\n\t\t\tattribute: 'linkHref',\n\t\t\tlocale\n\t\t} );\n\n\t\t// Setup highlight over selected link.\n\t\tthis._setupLinkHighlight();\n\t}\n\n\t/**\n\t * Processes an array of configured {@link module:link/link~LinkDecoratorAutomaticDefinition automatic decorators}\n\t * and registers a {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher downcast dispatcher}\n\t * for each one of them. Downcast dispatchers are obtained using the\n\t * {@link module:link/utils~AutomaticDecorators#getDispatcher} method.\n\t *\n\t * **Note**: This method also activates the automatic external link decorator if enabled with\n\t * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}.\n\t *\n\t * @private\n\t * @param {Array.<module:link/link~LinkDecoratorAutomaticDefinition>} automaticDecoratorDefinitions\n\t */\n\t_enableAutomaticDecorators( automaticDecoratorDefinitions ) {\n\t\tconst editor = this.editor;\n\t\tconst automaticDecorators = new AutomaticDecorators();\n\n\t\t// Adds a default decorator for external links.\n\t\tif ( editor.config.get( 'link.addTargetToExternalLinks' ) ) {\n\t\t\tautomaticDecorators.add( {\n\t\t\t\tid: 'linkIsExternal',\n\t\t\t\tmode: DECORATOR_AUTOMATIC,\n\t\t\t\tcallback: url => EXTERNAL_LINKS_REGEXP.test( url ),\n\t\t\t\tattributes: {\n\t\t\t\t\ttarget: '_blank',\n\t\t\t\t\trel: 'noopener noreferrer'\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\tautomaticDecorators.add( automaticDecoratorDefinitions );\n\n\t\tif ( automaticDecorators.length ) {\n\t\t\teditor.conversion.for( 'downcast' ).add( automaticDecorators.getDispatcher() );\n\t\t}\n\t}\n\n\t/**\n\t * Processes an array of configured {@link module:link/link~LinkDecoratorManualDefinition manual decorators},\n\t * transforms them into {@link module:link/utils~ManualDecorator} instances and stores them in the\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators} collection (a model for manual decorators state).\n\t *\n\t * Also registers an {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement attribute-to-element}\n\t * converter for each manual decorator and extends the {@link module:engine/model/schema~Schema model's schema}\n\t * with adequate model attributes.\n\t *\n\t * @private\n\t * @param {Array.<module:link/link~LinkDecoratorManualDefinition>} manualDecoratorDefinitions\n\t */\n\t_enableManualDecorators( manualDecoratorDefinitions ) {\n\t\tif ( !manualDecoratorDefinitions.length ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst editor = this.editor;\n\t\tconst command = editor.commands.get( 'link' );\n\t\tconst manualDecorators = command.manualDecorators;\n\n\t\tmanualDecoratorDefinitions.forEach( decorator => {\n\t\t\teditor.model.schema.extend( '$text', { allowAttributes: decorator.id } );\n\n\t\t\t// Keeps reference to manual decorator to decode its name to attributes during downcast.\n\t\t\tmanualDecorators.add( new ManualDecorator( decorator ) );\n\n\t\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t\t\t\tmodel: decorator.id,\n\t\t\t\tview: ( manualDecoratorName, writer ) => {\n\t\t\t\t\tif ( manualDecoratorName ) {\n\t\t\t\t\t\tconst attributes = manualDecorators.get( decorator.id ).attributes;\n\t\t\t\t\t\tconst element = writer.createAttributeElement( 'a', attributes, { priority: 5 } );\n\t\t\t\t\t\twriter.setCustomProperty( 'link', true, element );\n\n\t\t\t\t\t\treturn element;\n\t\t\t\t\t}\n\t\t\t\t} } );\n\n\t\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t\t\t\tview: {\n\t\t\t\t\tname: 'a',\n\t\t\t\t\tattributes: manualDecorators.get( decorator.id ).attributes\n\t\t\t\t},\n\t\t\t\tmodel: {\n\t\t\t\t\tkey: decorator.id\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n\n\t/**\n\t * Adds a visual highlight style to a link in which the selection is anchored.\n\t * Together with two-step caret movement, they indicate that the user is typing inside the link.\n\t *\n\t * Highlight is turned on by adding the `.ck-link_selected` class to the link in the view:\n\t *\n\t * * The class is removed before the conversion has started, as callbacks added with the `'highest'` priority\n\t * to {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} events.\n\t * * The class is added in the view post fixer, after other changes in the model tree were converted to the view.\n\t *\n\t * This way, adding and removing the highlight does not interfere with conversion.\n\t *\n\t * @private\n\t */\n\t_setupLinkHighlight() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst highlightedLinks = new Set();\n\n\t\t// Adding the class.\n\t\tview.document.registerPostFixer( writer => {\n\t\t\tconst selection = editor.model.document.selection;\n\t\t\tlet changed = false;\n\n\t\t\tif ( selection.hasAttribute( 'linkHref' ) ) {\n\t\t\t\tconst modelRange = findLinkRange( selection.getFirstPosition(), selection.getAttribute( 'linkHref' ), editor.model );\n\t\t\t\tconst viewRange = editor.editing.mapper.toViewRange( modelRange );\n\n\t\t\t\t// There might be multiple `a` elements in the `viewRange`, for example, when the `a` element is\n\t\t\t\t// broken by a UIElement.\n\t\t\t\tfor ( const item of viewRange.getItems() ) {\n\t\t\t\t\tif ( item.is( 'a' ) && !item.hasClass( HIGHLIGHT_CLASS ) ) {\n\t\t\t\t\t\twriter.addClass( HIGHLIGHT_CLASS, item );\n\t\t\t\t\t\thighlightedLinks.add( item );\n\t\t\t\t\t\tchanged = true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn changed;\n\t\t} );\n\n\t\t// Removing the class.\n\t\teditor.conversion.for( 'editingDowncast' ).add( dispatcher => {\n\t\t\t// Make sure the highlight is removed on every possible event, before conversion is started.\n\t\t\tdispatcher.on( 'insert', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'remove', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'attribute', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'selection', removeHighlight, { priority: 'highest' } );\n\n\t\t\tfunction removeHighlight() {\n\t\t\t\tview.change( writer => {\n\t\t\t\t\tfor ( const item of highlightedLinks.values() ) {\n\t\t\t\t\t\twriter.removeClass( HIGHLIGHT_CLASS, item );\n\t\t\t\t\t\thighlightedLinks.delete( item );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/notification/notification\n */\n\n/* globals window */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The Notification plugin.\n *\n * This plugin sends a few types of notifications: `success`, `info` and `warning`. The notifications need to be\n * handled and displayed by a plugin responsible for showing the UI of the notifications. Using this plugin for dispatching\n * notifications makes it possible to switch the notifications UI.\n *\n * Note that every unhandled and not stopped `warning` notification will be displayed as a system alert.\n * See {@link module:ui/notification/notification~Notification#showWarning}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Notification extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Notification';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\t// Each unhandled and not stopped `show:warning` event is displayed as a system alert.\n\t\tthis.on( 'show:warning', ( evt, data ) => {\n\t\t\twindow.alert( data.message ); // eslint-disable-line no-alert\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Shows a success notification.\n\t *\n\t * By default, it fires the {@link #event:show:success `show:success` event} with the given `data`. The event namespace can be extended\n\t * using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowSuccess( 'Image is uploaded.', {\n\t * \t\t\tnamespace: 'upload:image'\n\t * \t\t} );\n\t *\n\t * will fire the `show:success:upload:image` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowSuccess( 'Image is uploaded.', {\n\t *\t\t\ttitle: 'Image upload success'\n\t *\t\t} );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowSuccess( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'success',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Shows an information notification.\n\t *\n\t * By default, it fires the {@link #event:show:info `show:info` event} with the given `data`. The event namespace can be extended\n\t * using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowInfo( 'Editor is offline.', {\n\t * \t\t\tnamespace: 'editor:status'\n\t * \t\t} );\n\t *\n\t * will fire the `show:info:editor:status` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowInfo( 'Editor is offline.', {\n\t *\t\t\ttitle: 'Network information'\n\t *\t\t} );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowInfo( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'info',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Shows a warning notification.\n\t *\n\t * By default, it fires the {@link #event:show:warning `show:warning` event}\n\t * with the given `data`. The event namespace can be extended using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowWarning( 'Image upload error.', {\n\t * \t\t\tnamespace: 'upload:image'\n\t * \t\t} );\n\t *\n\t * will fire the `show:warning:upload:image` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowWarning( 'Image upload error.', {\n\t *\t\t\ttitle: 'Upload failed'\n\t *\t\t} );\n\t *\n\t * Note that each unhandled and not stopped `warning` notification will be displayed as a system alert.\n\t * The plugin responsible for displaying warnings should `stop()` the event to prevent displaying it as an alert:\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Do something with the data.\n\t *\n\t * \t\t\t// Stop this event to prevent displaying it as an alert.\n\t * \t\t\tevt.stop();\n\t * \t\t} );\n\t *\n\t * You can attach many listeners to the same event and `stop()` this event in a listener with a low priority:\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Show the warning in the UI, but do not stop it.\n\t * \t\t} );\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Log the warning to some error tracker.\n\t *\n\t * \t\t\t// Stop this event to prevent displaying it as an alert.\n\t * \t\t\tevt.stop();\n\t * \t\t}, { priority: 'low' } );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowWarning( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'warning',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Fires the `show` event with the specified type, namespace and message.\n\t *\n\t * @private\n\t * @param {Object} data The message data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {'success'|'info'|'warning'} data.type The type of the message.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title=''] The title of the notification.\n\t */\n\t_showNotification( data ) {\n\t\tconst event = `show:${ data.type }` + ( data.namespace ? `:${ data.namespace }` : '' );\n\n\t\tthis.fire( event, {\n\t\t\tmessage: data.message,\n\t\t\ttype: data.type,\n\t\t\ttitle: data.title || ''\n\t\t} );\n\t}\n\n\t/**\n\t * Fired when one of the `showSuccess()`, `showInfo()`, `showWarning()` methods is called.\n\t *\n\t * @event show\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'success'|'info'|'warning'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showSuccess()` method is called.\n\t *\n\t * @event show:success\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'success'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showInfo()` method is called.\n\t *\n\t * @event show:info\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'info'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showWarning()` method is called.\n\t *\n\t * When this event is not handled or stopped by `event.stop()`, the `data.message` of this event will\n\t * be automatically displayed as a system alert.\n\t *\n\t * @event show:warning\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'warning'} data.type The type of the notification.\n\t */\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/* global window */\n/**\n * @module ckfinder/ckfindercommand\n */\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n/**\n * The CKFinder command. It is used by the {@link module:ckfinder/ckfinderediting~CKFinderEditing CKFinder editing feature}\n * to open the CKFinder file manager to insert an image or a link to a file into the editor content.\n *\n *\t\teditor.execute( 'ckfinder' );\n *\n * **Note:** This command uses other features to perform tasks:\n * - To insert images the {@link module:image/image/imageinsertcommand~ImageInsertCommand 'imageInsert'} command\n * from the {@link module:image/image~Image Image feature}.\n * - To insert links to files the {@link module:link/linkcommand~LinkCommand 'link'} command\n * from the {@link module:link/link~Link Link feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class CKFinderCommand extends Command {\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n // Remove default document listener to lower its priority.\n this.stopListening(this.editor.model.document, 'change');\n // Lower this command listener priority to be sure that refresh() will be called after link & image refresh.\n this.listenTo(this.editor.model.document, 'change', () => this.refresh(), { priority: 'low' });\n }\n /**\n\t * @inheritDoc\n\t */\n refresh() {\n const imageCommand = this.editor.commands.get('imageInsert');\n const linkCommand = this.editor.commands.get('link');\n // The CKFinder command is enabled when one of image or link command is enabled.\n this.isEnabled = imageCommand.isEnabled || linkCommand.isEnabled;\n }\n /**\n\t * @inheritDoc\n\t */\n execute() {\n const editor = this.editor;\n const openerMethod = this.editor.config.get('ckfinder.openerMethod') || 'modal';\n if (openerMethod != 'popup' && openerMethod != 'modal') {\n throw new CKEditorError('ckfinder-unknown-openerMethod: The openerMethod config option must by \"popup\" or \"modal\".', editor);\n }\n const options = this.editor.config.get('ckfinder.options') || {};\n options.chooseFiles = true;\n // Cache the user-defined onInit method\n const originalOnInit = options.onInit;\n // Pass the lang code to the CKFinder if not defined by user.\n if (!options.language) {\n options.language = editor.locale.uiLanguage;\n }\n // The onInit method allows to extend CKFinder's behavior. It is used to attach event listeners to file choosing related events.\n options.onInit = finder => {\n // Call original options.onInit if it was defined by user.\n if (originalOnInit) {\n originalOnInit(finder);\n }\n finder.on('files:choose', evt => {\n const files = evt.data.files.toArray();\n // Insert links\n const links = files.filter(file => !file.isImage());\n const images = files.filter(file => file.isImage());\n for (const linkFile of links) {\n editor.execute('link', linkFile.getUrl());\n }\n const imagesUrls = [];\n for (const image of images) {\n const url = image.getUrl();\n imagesUrls.push(url ? url : finder.request('file:getProxyUrl', { file: image }));\n }\n if (imagesUrls.length) {\n insertImages(editor, imagesUrls);\n }\n });\n finder.on('file:choose:resizedImage', evt => {\n const resizedUrl = evt.data.resizedUrl;\n if (!resizedUrl) {\n const notification = editor.plugins.get('Notification');\n const t = editor.locale.t;\n notification.showWarning(t('at'), {\n title: t('au'),\n namespace: 'ckfinder'\n });\n return;\n }\n insertImages(editor, [resizedUrl]);\n });\n };\n window.CKFinder[openerMethod](options);\n }\n}\nfunction insertImages(editor, urls) {\n const imageCommand = editor.commands.get('imageInsert');\n // Check if inserting an image is actually possible - it might be possible to only insert a link.\n if (!imageCommand.isEnabled) {\n const notification = editor.plugins.get('Notification');\n const t = editor.locale.t;\n notification.showWarning(t('av'), {\n title: t('aw'),\n namespace: 'ckfinder'\n });\n return;\n }\n editor.execute('imageInsert', { source: urls });\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ckfinder/ckfinderediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageEditing from '@ckeditor/ckeditor5-image/src/image/imageediting';\nimport LinkEditing from '@ckeditor/ckeditor5-link/src/linkediting';\nimport Notification from '@ckeditor/ckeditor5-ui/src/notification/notification';\n\nimport CKFinderCommand from './ckfindercommand';\n\n/**\n * The CKFinder editing feature. It introduces the {@link module:ckfinder/ckfindercommand~CKFinderCommand CKFinder command}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CKFinderEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Notification, ImageEditing, LinkEditing ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\teditor.commands.add( 'ckfinder', new CKFinderCommand( editor ) );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/uploadgateway/fileuploader\n */\n\n/* globals XMLHttpRequest, FormData, Blob, atob */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst BASE64_HEADER_REG_EXP = /^data:(\\S*?);base64,/;\n\n/**\n * FileUploader class used to upload single file.\n */\nexport default class FileUploader {\n\t/**\n\t * Creates `FileUploader` instance.\n\t *\n\t * @param {Blob|String} fileOrData A blob object or a data string encoded with Base64.\n\t * @param {module:cloud-services-core/token~Token} token Token used for authentication.\n\t * @param {String} apiAddress API address.\n\t */\n\tconstructor( fileOrData, token, apiAddress ) {\n\t\tif ( !fileOrData ) {\n\t\t\t/**\n\t\t\t * File must be provided as the first argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-file\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-file: File must be provided as the first argument', null );\n\t\t}\n\n\t\tif ( !token ) {\n\t\t\t/**\n\t\t\t * Token must be provided as the second argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-token\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-token: Token must be provided as the second argument.', null );\n\t\t}\n\n\t\tif ( !apiAddress ) {\n\t\t\t/**\n\t\t\t * Api address must be provided as the third argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-api-address\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-api-address: Api address must be provided as the third argument.', null );\n\t\t}\n\n\t\t/**\n\t\t * A file that is being uploaded.\n\t\t *\n\t\t * @type {Blob}\n\t\t */\n\t\tthis.file = _isBase64( fileOrData ) ? _base64ToBlob( fileOrData ) : fileOrData;\n\n\t\t/**\n\t\t * CKEditor Cloud Services access token.\n\t\t *\n\t\t * @type {module:cloud-services-core/token~Token}\n\t\t * @private\n\t\t */\n\t\tthis._token = token;\n\n\t\t/**\n\t\t * CKEditor Cloud Services API address.\n\t\t *\n\t\t * @type {String}\n\t\t * @private\n\t\t */\n\t\tthis._apiAddress = apiAddress;\n\t}\n\n\t/**\n\t * Registers callback on `progress` event.\n\t *\n\t * @chainable\n\t * @param {Function} callback\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader}\n\t */\n\tonProgress( callback ) {\n\t\tthis.on( 'progress', ( event, data ) => callback( data ) );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Registers callback on `error` event. Event is called once when error occurs.\n\t *\n\t * @chainable\n\t * @param {Function} callback\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader}\n\t */\n\tonError( callback ) {\n\t\tthis.once( 'error', ( event, data ) => callback( data ) );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Aborts upload process.\n\t */\n\tabort() {\n\t\tthis.xhr.abort();\n\t}\n\n\t/**\n\t * Sends XHR request to API.\n\t *\n\t * @chainable\n\t * @returns {Promise.<Object>}\n\t */\n\tsend() {\n\t\tthis._prepareRequest();\n\t\tthis._attachXHRListeners();\n\n\t\treturn this._sendRequest();\n\t}\n\n\t/**\n\t * Prepares XHR request.\n\t *\n\t * @private\n\t */\n\t_prepareRequest() {\n\t\tconst xhr = new XMLHttpRequest();\n\n\t\txhr.open( 'POST', this._apiAddress );\n\t\txhr.setRequestHeader( 'Authorization', this._token.value );\n\t\txhr.responseType = 'json';\n\n\t\tthis.xhr = xhr;\n\t}\n\n\t/**\n\t * Attaches listeners to the XHR.\n\t *\n\t * @private\n\t */\n\t_attachXHRListeners() {\n\t\tconst that = this;\n\t\tconst xhr = this.xhr;\n\n\t\txhr.addEventListener( 'error', onError( 'Network Error' ) );\n\t\txhr.addEventListener( 'abort', onError( 'Abort' ) );\n\n\t\t/* istanbul ignore else */\n\t\tif ( xhr.upload ) {\n\t\t\txhr.upload.addEventListener( 'progress', event => {\n\t\t\t\tif ( event.lengthComputable ) {\n\t\t\t\t\tthis.fire( 'progress', {\n\t\t\t\t\t\ttotal: event.total,\n\t\t\t\t\t\tuploaded: event.loaded\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\txhr.addEventListener( 'load', () => {\n\t\t\tconst statusCode = xhr.status;\n\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\treturn this.fire( 'error', xhrResponse.message || xhrResponse.error );\n\t\t\t}\n\t\t} );\n\n\t\tfunction onError( message ) {\n\t\t\treturn () => that.fire( 'error', message );\n\t\t}\n\t}\n\n\t/**\n\t * Sends XHR request.\n\t *\n\t * @private\n\t */\n\t_sendRequest() {\n\t\tconst formData = new FormData();\n\t\tconst xhr = this.xhr;\n\n\t\tformData.append( 'file', this.file );\n\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\txhr.addEventListener( 'load', () => {\n\t\t\t\tconst statusCode = xhr.status;\n\t\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\t\tif ( xhrResponse.message ) {\n\t\t\t\t\t\t/**\n\t\t\t\t\t\t * Uploading file failed.\n\t\t\t\t\t\t *\n\t\t\t\t\t\t * @error fileuploader-uploading-data-failed\n\t\t\t\t\t\t */\n\t\t\t\t\t\treturn reject( new CKEditorError(\n\t\t\t\t\t\t\t'fileuploader-uploading-data-failed: Uploading file failed.',\n\t\t\t\t\t\t\tthis,\n\t\t\t\t\t\t\t{ message: xhrResponse.message }\n\t\t\t\t\t\t) );\n\t\t\t\t\t}\n\n\t\t\t\t\treturn reject( xhrResponse.error );\n\t\t\t\t}\n\n\t\t\t\treturn resolve( xhrResponse );\n\t\t\t} );\n\n\t\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n\t\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n\n\t\t\txhr.send( formData );\n\t\t} );\n\t}\n\n\t/**\n\t * Fired when error occurs.\n\t *\n\t * @event error\n\t * @param {String} error Error message\n\t */\n\n\t/**\n\t * Fired on upload progress.\n\t *\n\t * @event progress\n\t * @param {Object} status Total and uploaded status\n\t */\n}\n\nmix( FileUploader, EmitterMixin );\n\n/**\n * Transforms Base64 string data into file.\n *\n * @param {String} base64 String data.\n * @param {Number} [sliceSize=512]\n * @returns {Blob}\n * @private\n */\nfunction _base64ToBlob( base64, sliceSize = 512 ) {\n\ttry {\n\t\tconst contentType = base64.match( BASE64_HEADER_REG_EXP )[ 1 ];\n\t\tconst base64Data = atob( base64.replace( BASE64_HEADER_REG_EXP, '' ) );\n\n\t\tconst byteArrays = [];\n\n\t\tfor ( let offset = 0; offset < base64Data.length; offset += sliceSize ) {\n\t\t\tconst slice = base64Data.slice( offset, offset + sliceSize );\n\t\t\tconst byteNumbers = new Array( slice.length );\n\n\t\t\tfor ( let i = 0; i < slice.length; i++ ) {\n\t\t\t\tbyteNumbers[ i ] = slice.charCodeAt( i );\n\t\t\t}\n\n\t\t\tbyteArrays.push( new Uint8Array( byteNumbers ) );\n\t\t}\n\n\t\treturn new Blob( byteArrays, { type: contentType } );\n\t} catch ( error ) {\n\t\t/**\n\t\t * Problem with decoding Base64 image data.\n\t\t *\n\t\t * @error fileuploader-decoding-image-data-error\n\t\t */\n\t\tthrow new CKEditorError( 'fileuploader-decoding-image-data-error: Problem with decoding Base64 image data.', null );\n\t}\n}\n\n/**\n * Checks that string is Base64.\n *\n * @param {String} string\n * @returns {Boolean}\n * @private\n */\nfunction _isBase64( string ) {\n\tif ( typeof string !== 'string' ) {\n\t\treturn false;\n\t}\n\n\tconst match = string.match( BASE64_HEADER_REG_EXP );\n\treturn !!( match && match.length );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/token\n */\n\n/* globals XMLHttpRequest, setInterval, clearInterval */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst DEFAULT_OPTIONS = { refreshInterval: 3600000, autoRefresh: true };\n\n/**\n * Class representing the token used for communication with CKEditor Cloud Services.\n * Value of the token is retrieving from the specified URL and is refreshed every 1 hour by default.\n *\n * @mixes ObservableMixin\n */\nclass Token {\n\t/**\n\t * Creates `Token` instance.\n\t * Method `init` should be called after using the constructor or use `create` method instead.\n\t *\n\t * @param {String|Function} tokenUrlOrRefreshToken Endpoint address to download the token or a callback that provides the token. If the\n\t * value is a function it has to match the {@link module:cloud-services-core/token~refreshToken} interface.\n\t * @param {Object} options\n\t * @param {String} [options.initValue] Initial value of the token.\n\t * @param {Number} [options.refreshInterval=3600000] Delay between refreshes. Default 1 hour.\n\t * @param {Boolean} [options.autoRefresh=true] Specifies whether to start the refresh automatically.\n\t */\n\tconstructor( tokenUrlOrRefreshToken, options = DEFAULT_OPTIONS ) {\n\t\tif ( !tokenUrlOrRefreshToken ) {\n\t\t\t/**\n\t\t\t * A `tokenUrl` must be provided as the first constructor argument.\n\t\t\t *\n\t\t\t * @error token-missing-token-url\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'token-missing-token-url: A `tokenUrl` must be provided as the first constructor argument.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Value of the token.\n\t\t * The value of the token is null if `initValue` is not provided or `init` method was not called.\n\t\t * `create` method creates token with initialized value from url.\n\t\t *\n\t\t * @name value\n\t\t * @member {String} #value\n\t\t * @observable\n\t\t * @readonly\n\t\t */\n\t\tthis.set( 'value', options.initValue );\n\n\t\t/**\n\t\t * Base refreshing function.\n\t\t *\n\t\t * @private\n\t\t * @member {String|Function} #_refresh\n\t\t */\n\t\tif ( typeof tokenUrlOrRefreshToken === 'function' ) {\n\t\t\tthis._refresh = tokenUrlOrRefreshToken;\n\t\t} else {\n\t\t\tthis._refresh = () => defaultRefreshToken( tokenUrlOrRefreshToken );\n\t\t}\n\n\t\t/**\n\t\t * @type {Object}\n\t\t * @private\n\t\t */\n\t\tthis._options = Object.assign( {}, DEFAULT_OPTIONS, options );\n\t}\n\n\t/**\n\t * Initializes the token.\n\t *\n\t * @returns {Promise.<module:cloud-services-core/token~Token>}\n\t */\n\tinit() {\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\tif ( this._options.autoRefresh ) {\n\t\t\t\tthis._startRefreshing();\n\t\t\t}\n\n\t\t\tif ( !this.value ) {\n\t\t\t\tthis._refreshToken()\n\t\t\t\t\t.then( resolve )\n\t\t\t\t\t.catch( reject );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tresolve( this );\n\t\t} );\n\t}\n\n\t/**\n\t * Refresh token method. Useful in a method form as it can be override in tests.\n\t *\n\t * @protected\n\t */\n\t_refreshToken() {\n\t\treturn this._refresh()\n\t\t\t.then( value => this.set( 'value', value ) )\n\t\t\t.then( () => this );\n\t}\n\n\t/**\n\t * Destroys token instance. Stops refreshing.\n\t */\n\tdestroy() {\n\t\tthis._stopRefreshing();\n\t}\n\n\t/**\n\t * Starts value refreshing every `refreshInterval` time.\n\t *\n\t * @protected\n\t */\n\t_startRefreshing() {\n\t\tthis._refreshInterval = setInterval( () => this._refreshToken(), this._options.refreshInterval );\n\t}\n\n\t/**\n\t * Stops value refreshing.\n\t *\n\t * @protected\n\t */\n\t_stopRefreshing() {\n\t\tclearInterval( this._refreshInterval );\n\t}\n\n\t/**\n\t * Creates a initialized {@link module:cloud-services-core/token~Token} instance.\n\t *\n\t * @param {String|Function} tokenUrlOrRefreshToken Endpoint address to download the token or a callback that provides the token. If the\n\t * value is a function it has to match the {@link module:cloud-services-core/token~refreshToken} interface.\n\t * @param {Object} options\n\t * @param {String} [options.initValue] Initial value of the token.\n\t * @param {Number} [options.refreshInterval=3600000] Delay between refreshes. Default 1 hour.\n\t * @param {Boolean} [options.autoRefresh=true] Specifies whether to start the refresh automatically.\n\t * @returns {Promise.<module:cloud-services-core/token~Token>}\n\t */\n\tstatic create( tokenUrlOrRefreshToken, options = DEFAULT_OPTIONS ) {\n\t\tconst token = new Token( tokenUrlOrRefreshToken, options );\n\n\t\treturn token.init();\n\t}\n}\n\nmix( Token, ObservableMixin );\n\n/**\n * This function is called in a defined interval by the {@link ~Token} class.\n * It should return a promise, which resolves with the new token value.\n * If any error occurs it should return a rejected promise with an error message.\n *\n * @function refreshToken\n * @returns {Promise.<String>}\n */\n\n/**\n * @private\n * @param {String} tokenUrl\n */\nfunction defaultRefreshToken( tokenUrl ) {\n\treturn new Promise( ( resolve, reject ) => {\n\t\tconst xhr = new XMLHttpRequest();\n\n\t\txhr.open( 'GET', tokenUrl );\n\n\t\txhr.addEventListener( 'load', () => {\n\t\t\tconst statusCode = xhr.status;\n\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\t/**\n\t\t\t\t * Cannot download new token from the provided url.\n\t\t\t\t *\n\t\t\t\t * @error token-cannot-download-new-token\n\t\t\t\t */\n\t\t\t\treturn reject(\n\t\t\t\t\tnew CKEditorError( 'token-cannot-download-new-token: Cannot download new token from the provided url.', null )\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn resolve( xhrResponse );\n\t\t} );\n\n\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n\n\t\txhr.send();\n\t} );\n}\n\nexport default Token;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services/cloudservices\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Token from '@ckeditor/ckeditor-cloud-services-core/src/token/token';\n\n/**\n * Plugin introducing integration between CKEditor 5 and CKEditor Cloud Services .\n *\n * It initializes the token provider based on\n * the {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudService`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CloudServices extends Plugin {\n\t/**\n\t * @inheritdoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CloudServices';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst config = editor.config;\n\n\t\tconst options = config.get( 'cloudServices' ) || {};\n\n\t\tfor ( const optionName in options ) {\n\t\t\tthis[ optionName ] = options[ optionName ];\n\t\t}\n\n\t\t/**\n\t\t * The authentication token URL for CKEditor Cloud Services or a callback to the token value promise. See the\n\t\t * {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} for more details.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String|Function|undefined} #tokenUrl\n\t\t */\n\n\t\t/**\n\t\t * The URL to which the files should be uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #uploadUrl\n\t\t */\n\n\t\t/**\n\t\t * Other plugins use this token for the authorization process. It handles token requesting and refreshing.\n\t\t * Its value is `null` when {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} is not provided.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object|null} #token\n\t\t */\n\n\t\tif ( !this.tokenUrl ) {\n\t\t\tthis.token = null;\n\n\t\t\treturn;\n\t\t}\n\n\t\tthis.token = new CloudServices.Token( this.tokenUrl );\n\n\t\treturn this.token.init();\n\t}\n}\n\nCloudServices.Token = Token;\n\n/**\n * The configuration of CKEditor Cloud Services. Introduced by the {@link module:cloud-services/cloudservices~CloudServices} plugin.\n *\n * Read more in {@link module:cloud-services/cloudservices~CloudServicesConfig}.\n *\n * @member {module:cloud-services/cloudservices~CloudServicesConfig} module:core/editor/editorconfig~EditorConfig#cloudServices\n */\n\n/**\n * The configuration for all plugins using CKEditor Cloud Services.\n *\n *\t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: 'https://example.com/cs-token-endpoint',\n *\t\t\t\t\tuploadUrl: 'https://your-organization-id.cke-cs.com/easyimage/upload/'\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface CloudServicesConfig\n */\n\n/**\n * A token URL or a token request function.\n *\n * As a string, it should be a URL to the security token endpoint in your application. The role of this endpoint is to securely authorize\n * the end users of your application to use [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services) only\n * if they should have access e.g. to upload files with {@glink @cs guides/easy-image/quick-start Easy Image} or to use the\n * {@glink @cs guides/collaboration/quick-start Collaboration} service.\n *\n *\t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: 'https://example.com/cs-token-endpoint',\n *\t\t\t\t\t...\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * As a function, it should provide a promise to the token value, so you can highly customize the token and provide your token URL endpoint.\n * By using this approach you can set your own headers for the request.\n *\n * \t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: () => new Promise( ( resolve, reject ) => {\n *\t\t\t\t\t\tconst xhr = new XMLHttpRequest();\n *\n *\t\t\t\t\t\txhr.open( 'GET', 'https://example.com/cs-token-endpoint' );\n *\n *\t\t\t\t\t\txhr.addEventListener( 'load', () => {\n *\t\t\t\t\t\t\tconst statusCode = xhr.status;\n *\t\t\t\t\t\t\tconst xhrResponse = xhr.response;\n *\n *\t\t\t\t\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n *\t\t\t\t\t\t\t\treturn reject( new Error( 'Cannot download new token!' ) );\n *\t\t\t\t\t\t\t}\n *\n *\t\t\t\t\t\t\treturn resolve( xhrResponse );\n *\t\t\t\t\t\t} );\n *\n *\t\t\t\t\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n *\t\t\t\t\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n *\n *\t\t\t\t\t\txhr.setRequestHeader( customHeader, customValue );\n *\n *\t\t\t\t\t\txhr.send();\n *\t\t\t\t\t} ),\n *\t\t\t\t\t...\n *\t\t\t\t}\n *\t\t\t} )\n *\n * You can find more information about token endpoints in the\n * {@glink @cs guides/easy-image/quick-start#create-token-endpoint Cloud Services - Quick start}\n * and {@glink @cs guides/security/token-endpoint Cloud Services - Token endpoint} documentation.\n *\n * Without a properly working token endpoint (token URL) CKEditor plugins will not be able to connect to CKEditor Cloud Services.\n *\n * @member {String|Function} module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl\n */\n\n/**\n * The endpoint URL for [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services) uploads.\n * This option must be set for Easy Image to work correctly.\n *\n * The upload URL is unique for each customer and can be found in the\n * [CKEditor Ecosystem customer dashboard](https://dashboard.ckeditor.com) after subscribing to the Easy Image service.\n * To learn how to start using Easy Image, check the {@glink @cs guides/easy-image/quick-start Easy Image - Quick start} documentation.\n *\n * Note: Make sure to also set the {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} configuration option.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#uploadUrl\n */\n\n/**\n * The URL for web socket communication, used by the `RealTimeCollaborativeEditing` plugin. Every customer (organization in the CKEditor\n * Ecosystem dashboard) has their own, unique URLs to communicate with CKEditor Cloud Services. The URL can be found in the\n * CKEditor Ecosystem customer dashboard.\n *\n * Note: Unlike most plugins, `RealTimeCollaborativeEditing` is not included in any CKEditor 5 build and needs to be installed manually.\n * Check [Collaboration overview](https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/overview.html) for more details.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#webSocketUrl\n */\n\n/**\n * Document ID, used by the `RealTimeCollaborativeEditing` plugin. All editor instances created with the same document ID will collaborate.\n * It means that each document needs a different document ID if you do not want to start collaboration between these documents.\n * The ID is usually a primary key of the document in the database, but you are free to provide whatever identifier fits your scenario.\n *\n * Note: Unlike most plugins, `RealTimeCollaborativeEditing` is not included in any CKEditor 5 build and needs to be installed manually.\n * Check [Collaboration overview](https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/overview.html) for more details.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#documentId\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n* @module easy-image/cloudservicesuploadadapter\n*/\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport UploadGateway from '@ckeditor/ckeditor-cloud-services-core/src/uploadgateway/uploadgateway';\nimport CloudServices from '@ckeditor/ckeditor5-cloud-services/src/cloudservices';\n\n/**\n * A plugin that enables upload to [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/).\n *\n * It is mainly used by the {@link module:easy-image/easyimage~EasyImage} feature.\n *\n * After enabling this adapter you need to configure the CKEditor Cloud Services integration through\n * {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudServices`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CloudServicesUploadAdapter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ FileRepository, CloudServices ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\tconst cloudServices = editor.plugins.get( CloudServices );\n\n\t\tconst token = cloudServices.token;\n\t\tconst uploadUrl = cloudServices.uploadUrl;\n\n\t\tif ( !token ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._uploadGateway = new CloudServicesUploadAdapter._UploadGateway( token, uploadUrl );\n\n\t\teditor.plugins.get( FileRepository ).createUploadAdapter = loader => {\n\t\t\treturn new Adapter( this._uploadGateway, loader );\n\t\t};\n\t}\n}\n\n/**\n * @private\n */\nclass Adapter {\n\tconstructor( uploadGateway, loader ) {\n\t\tthis.uploadGateway = uploadGateway;\n\n\t\tthis.loader = loader;\n\t}\n\n\tupload() {\n\t\treturn this.loader.file.then( file => {\n\t\t\tthis.fileUploader = this.uploadGateway.upload( file );\n\n\t\t\tthis.fileUploader.on( 'progress', ( evt, data ) => {\n\t\t\t\tthis.loader.uploadTotal = data.total;\n\t\t\t\tthis.loader.uploaded = data.uploaded;\n\t\t\t} );\n\n\t\t\treturn this.fileUploader.send();\n\t\t} );\n\t}\n\n\tabort() {\n\t\tthis.fileUploader.abort();\n\t}\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\nCloudServicesUploadAdapter._UploadGateway = UploadGateway;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/uploadgateway/uploadgateway\n */\n\nimport FileUploader from './fileuploader';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * UploadGateway abstracts file uploads to CKEditor Cloud Services.\n */\nexport default class UploadGateway {\n\t/**\n\t * Creates `UploadGateway` instance.\n\t *\n\t * @param {module:cloud-services-core/token~Token} token Token used for authentication.\n\t * @param {String} apiAddress API address.\n\t */\n\tconstructor( token, apiAddress ) {\n\t\tif ( !token ) {\n\t\t\t/**\n\t\t\t * Token must be provided.\n\t\t\t *\n\t\t\t * @error uploadgateway-missing-token\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'uploadgateway-missing-token: Token must be provided.', null );\n\t\t}\n\n\t\tif ( !apiAddress ) {\n\t\t\t/**\n\t\t\t * Api address must be provided.\n\t\t\t *\n\t\t\t * @error uploadgateway-missing-api-address\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'uploadgateway-missing-api-address: Api address must be provided.', null );\n\t\t}\n\n\t\t/**\n\t\t * CKEditor Cloud Services access token.\n\t\t *\n\t\t * @type {module:cloud-services-core/token~Token}\n\t\t * @private\n\t\t */\n\t\tthis._token = token;\n\n\t\t/**\n\t\t * CKEditor Cloud Services API address.\n\t\t *\n\t\t * @type {String}\n\t\t * @private\n\t\t */\n\t\tthis._apiAddress = apiAddress;\n\t}\n\n\t/**\n\t * Creates a {@link module:cloud-services-core/uploadgateway/fileuploader~FileUploader} instance that wraps\n\t * file upload process. The file is being sent at a time when the\n\t * {@link module:cloud-services-core/uploadgateway/fileuploader~FileUploader#send} method is called.\n\t *\n\t * const token = await Token.create( 'https://token-endpoint' );\n\t * new UploadGateway( token, 'https://example.org' )\n\t * .upload( 'FILE' )\n\t * .onProgress( ( data ) => console.log( data ) )\n\t * .send()\n\t * .then( ( response ) => console.log( response ) );\n\t *\n\t * @param {Blob|String} fileOrData A blob object or a data string encoded with Base64.\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader} Returns `FileUploader` instance.\n\t */\n\tupload( fileOrData ) {\n\t\treturn new FileUploader( fileOrData, this._token, this._apiAddress );\n\t}\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mouseobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Mouse events observer.\n *\n * Note that this observer is not available by default. To make it available it needs to be added to\n * {@link module:engine/view/view~View} by {@link module:engine/view/view~View#addObserver} method.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class MouseObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = 'mousedown';\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when mouse button is pressed down on one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/mouseobserver~MouseObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:engine/view/observer/mouseobserver~MouseObserver}\n * needs to be added to {@link module:engine/view/view~View} by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @see module:engine/view/observer/mouseobserver~MouseObserver\n * @event module:engine/view/document~Document#event:mousedown\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/widget\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport MouseObserver from '@ckeditor/ckeditor5-engine/src/view/observer/mouseobserver';\nimport { getLabel, isWidget, WIDGET_SELECTED_CLASS_NAME } from './utils';\nimport { getCode, keyCodes, parseKeystroke } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport '../theme/widget.css';\n\nconst selectAllKeystrokeCode = parseKeystroke( 'Ctrl+A' );\n\n/**\n * The widget plugin. It enables base support for widgets.\n *\n * See {@glink api/widget package page} for more details and documentation.\n *\n * This plugin enables multiple behaviors required by widgets:\n *\n * * The model to view selection converter for the editing pipeline (it handles widget custom selection rendering).\n * If a converted selection wraps around a widget element, that selection is marked as\n * {@link module:engine/view/selection~Selection#isFake fake}. Additionally, the `ck-widget_selected` CSS class\n * is added to indicate that widget has been selected.\n * * The mouse and keyboard events handling on and around widget elements.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Widget extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Widget';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst view = this.editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t/**\n\t\t * Holds previously selected widgets.\n\t\t *\n\t\t * @private\n\t\t * @type {Set.<module:engine/view/element~Element>}\n\t\t */\n\t\tthis._previouslySelected = new Set();\n\n\t\t// Model to view selection converter.\n\t\t// Converts selection placed over widget element to fake selection\n\t\tthis.editor.editing.downcastDispatcher.on( 'selection', ( evt, data, conversionApi ) => {\n\t\t\t// Remove selected class from previously selected widgets.\n\t\t\tthis._clearPreviouslySelectedWidgets( conversionApi.writer );\n\n\t\t\tconst viewWriter = conversionApi.writer;\n\t\t\tconst viewSelection = viewWriter.document.selection;\n\t\t\tconst selectedElement = viewSelection.getSelectedElement();\n\t\t\tlet lastMarked = null;\n\n\t\t\tfor ( const range of viewSelection.getRanges() ) {\n\t\t\t\tfor ( const value of range ) {\n\t\t\t\t\tconst node = value.item;\n\n\t\t\t\t\t// Do not mark nested widgets in selected one. See: #57.\n\t\t\t\t\tif ( isWidget( node ) && !isChild( node, lastMarked ) ) {\n\t\t\t\t\t\tviewWriter.addClass( WIDGET_SELECTED_CLASS_NAME, node );\n\n\t\t\t\t\t\tthis._previouslySelected.add( node );\n\t\t\t\t\t\tlastMarked = node;\n\n\t\t\t\t\t\t// Check if widget is a single element selected.\n\t\t\t\t\t\tif ( node == selectedElement ) {\n\t\t\t\t\t\t\tviewWriter.setSelection( viewSelection.getRanges(), { fake: true, label: getLabel( selectedElement ) } );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// If mouse down is pressed on widget - create selection over whole widget.\n\t\tview.addObserver( MouseObserver );\n\t\tthis.listenTo( viewDocument, 'mousedown', ( ...args ) => this._onMousedown( ...args ) );\n\n\t\t// Handle custom keydown behaviour.\n\t\tthis.listenTo( viewDocument, 'keydown', ( ...args ) => this._onKeydown( ...args ), { priority: 'high' } );\n\n\t\t// Handle custom delete behaviour.\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\tif ( this._handleDelete( data.direction == 'forward' ) ) {\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:mousedown mousedown} events on widget elements.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_onMousedown( eventInfo, domEventData ) {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\t\tlet element = domEventData.target;\n\n\t\t// Do nothing for single or double click inside nested editable.\n\t\tif ( isInsideNestedEditable( element ) ) {\n\t\t\t// But at least triple click inside nested editable causes broken selection in Safari.\n\t\t\t// For such event, we select the entire nested editable element.\n\t\t\t// See: https://github.com/ckeditor/ckeditor5/issues/1463.\n\t\t\tif ( env.isSafari && domEventData.domEvent.detail >= 3 ) {\n\t\t\t\tconst mapper = editor.editing.mapper;\n\t\t\t\tconst modelElement = mapper.toModelElement( element );\n\n\t\t\t\tthis.editor.model.change( writer => {\n\t\t\t\t\tdomEventData.preventDefault();\n\t\t\t\t\twriter.setSelection( modelElement, 'in' );\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// If target is not a widget element - check if one of the ancestors is.\n\t\tif ( !isWidget( element ) ) {\n\t\t\telement = element.findAncestor( isWidget );\n\n\t\t\tif ( !element ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tdomEventData.preventDefault();\n\n\t\t// Focus editor if is not focused already.\n\t\tif ( !viewDocument.isFocused ) {\n\t\t\tview.focus();\n\t\t}\n\n\t\t// Create model selection over widget.\n\t\tconst modelElement = editor.editing.mapper.toModelElement( element );\n\n\t\tthis._setSelectionOverElement( modelElement );\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:keydown keydown} events.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_onKeydown( eventInfo, domEventData ) {\n\t\tconst keyCode = domEventData.keyCode;\n\t\tconst isLtrContent = this.editor.locale.contentLanguageDirection === 'ltr';\n\t\tconst isForward = keyCode == keyCodes.arrowdown || keyCode == keyCodes[ isLtrContent ? 'arrowright' : 'arrowleft' ];\n\t\tlet wasHandled = false;\n\n\t\t// Checks if the keys were handled and then prevents the default event behaviour and stops\n\t\t// the propagation.\n\t\tif ( isArrowKeyCode( keyCode ) ) {\n\t\t\twasHandled = this._handleArrowKeys( isForward );\n\t\t} else if ( isSelectAllKeyCode( domEventData ) ) {\n\t\t\twasHandled = this._selectAllNestedEditableContent() || this._selectAllContent();\n\t\t} else if ( keyCode === keyCodes.enter ) {\n\t\t\twasHandled = this._handleEnterKey( domEventData.shiftKey );\n\t\t}\n\n\t\tif ( wasHandled ) {\n\t\t\tdomEventData.preventDefault();\n\t\t\teventInfo.stop();\n\t\t}\n\t}\n\n\t/**\n\t * Handles delete keys: backspace and delete.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Set to true if delete was performed in forward direction.\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleDelete( isForward ) {\n\t\t// Do nothing when the read only mode is enabled.\n\t\tif ( this.editor.isReadOnly ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelDocument = this.editor.model.document;\n\t\tconst modelSelection = modelDocument.selection;\n\n\t\t// Do nothing on non-collapsed selection.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst objectElement = this._getObjectElementNextToSelection( isForward );\n\n\t\tif ( objectElement ) {\n\t\t\tthis.editor.model.change( writer => {\n\t\t\t\tlet previousNode = modelSelection.anchor.parent;\n\n\t\t\t\t// Remove previous element if empty.\n\t\t\t\twhile ( previousNode.isEmpty ) {\n\t\t\t\t\tconst nodeToRemove = previousNode;\n\t\t\t\t\tpreviousNode = nodeToRemove.parent;\n\n\t\t\t\t\twriter.remove( nodeToRemove );\n\t\t\t\t}\n\n\t\t\t\tthis._setSelectionOverElement( objectElement );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Handles arrow keys.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Set to true if arrow key should be handled in forward direction.\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleArrowKeys( isForward ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst modelDocument = model.document;\n\t\tconst modelSelection = modelDocument.selection;\n\t\tconst objectElement = modelSelection.getSelectedElement();\n\n\t\t// If object element is selected.\n\t\tif ( objectElement && schema.isObject( objectElement ) ) {\n\t\t\tconst position = isForward ? modelSelection.getLastPosition() : modelSelection.getFirstPosition();\n\t\t\tconst newRange = schema.getNearestSelectionRange( position, isForward ? 'forward' : 'backward' );\n\n\t\t\tif ( newRange ) {\n\t\t\t\tmodel.change( writer => {\n\t\t\t\t\twriter.setSelection( newRange );\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// If selection is next to object element.\n\t\t// Return if not collapsed.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst objectElement2 = this._getObjectElementNextToSelection( isForward );\n\n\t\tif ( !!objectElement2 && schema.isObject( objectElement2 ) ) {\n\t\t\tthis._setSelectionOverElement( objectElement2 );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Handles the enter key, giving users and access to positions in the editable directly before\n\t * (<kbd>Shift</kbd>+<kbd>Enter</kbd>) or after (<kbd>Enter</kbd>) the selected widget.\n\t * It improves the UX, mainly when the widget is the first or last child of the root editable\n\t * and there's no other way to type after or before it.\n\t *\n\t * @private\n\t * @param {Boolean} isBackwards Set to true if the new paragraph is to be inserted before\n\t * the selected widget (<kbd>Shift</kbd>+<kbd>Enter</kbd>).\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleEnterKey( isBackwards ) {\n\t\tconst model = this.editor.model;\n\t\tconst modelSelection = model.document.selection;\n\t\tconst selectedElement = modelSelection.getSelectedElement();\n\n\t\tif ( shouldInsertParagraph( selectedElement, model.schema ) ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\tlet position = writer.createPositionAt( selectedElement, isBackwards ? 'before' : 'after' );\n\t\t\t\tconst paragraph = writer.createElement( 'paragraph' );\n\n\t\t\t\t// Split the parent when inside a block element.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5/issues/1529\n\t\t\t\tif ( model.schema.isBlock( selectedElement.parent ) ) {\n\t\t\t\t\tconst paragraphLimit = model.schema.findAllowedParent( position, paragraph );\n\n\t\t\t\t\tposition = writer.split( position, paragraphLimit ).position;\n\t\t\t\t}\n\n\t\t\t\twriter.insert( paragraph, position );\n\t\t\t\twriter.setSelection( paragraph, 'in' );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Extends the {@link module:engine/model/selection~Selection document's selection} to span the entire\n\t * content of the nested editable if already anchored in one.\n\t *\n\t * See: {@link module:engine/model/schema~Schema#getLimitElement}.\n\t *\n\t * @private\n\t */\n\t_selectAllNestedEditableContent() {\n\t\tconst model = this.editor.model;\n\t\tconst documentSelection = model.document.selection;\n\t\tconst limitElement = model.schema.getLimitElement( documentSelection );\n\n\t\tif ( documentSelection.getFirstRange().root == limitElement ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tmodel.change( writer => {\n\t\t\twriter.setSelection( writer.createRangeIn( limitElement ) );\n\t\t} );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Handles <kbd>CTRL + A</kbd> when widget is selected.\n\t *\n\t * @private\n\t * @returns {Boolean} Returns true if widget was selected and selecting all was handled by this method.\n\t */\n\t_selectAllContent() {\n\t\tconst model = this.editor.model;\n\t\tconst editing = this.editor.editing;\n\t\tconst view = editing.view;\n\t\tconst viewDocument = view.document;\n\t\tconst viewSelection = viewDocument.selection;\n\n\t\tconst selectedElement = viewSelection.getSelectedElement();\n\n\t\t// Only widget is selected.\n\t\t// https://github.com/ckeditor/ckeditor5-widget/issues/23\n\t\tif ( selectedElement && isWidget( selectedElement ) ) {\n\t\t\tconst widgetParent = editing.mapper.toModelElement( selectedElement.parent );\n\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( widgetParent ) );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Sets {@link module:engine/model/selection~Selection document's selection} over given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t */\n\t_setSelectionOverElement( element ) {\n\t\tthis.editor.model.change( writer => {\n\t\t\twriter.setSelection( writer.createRangeOn( element ) );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if {@link module:engine/model/element~Element element} placed next to the current\n\t * {@link module:engine/model/selection~Selection model selection} exists and is marked in\n\t * {@link module:engine/model/schema~Schema schema} as `object`.\n\t *\n\t * @private\n\t * @param {Boolean} forward Direction of checking.\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\t_getObjectElementNextToSelection( forward ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst modelSelection = model.document.selection;\n\n\t\t// Clone current selection to use it as a probe. We must leave default selection as it is so it can return\n\t\t// to its current state after undo.\n\t\tconst probe = model.createSelection( modelSelection );\n\t\tmodel.modifySelection( probe, { direction: forward ? 'forward' : 'backward' } );\n\t\tconst objectElement = forward ? probe.focus.nodeBefore : probe.focus.nodeAfter;\n\n\t\tif ( !!objectElement && schema.isObject( objectElement ) ) {\n\t\t\treturn objectElement;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Removes CSS class from previously selected widgets.\n\t *\n\t * @private\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\t_clearPreviouslySelectedWidgets( writer ) {\n\t\tfor ( const widget of this._previouslySelected ) {\n\t\t\twriter.removeClass( WIDGET_SELECTED_CLASS_NAME, widget );\n\t\t}\n\n\t\tthis._previouslySelected.clear();\n\t}\n}\n\n// Returns 'true' if provided key code represents one of the arrow keys.\n//\n// @param {Number} keyCode\n// @returns {Boolean}\nfunction isArrowKeyCode( keyCode ) {\n\treturn keyCode == keyCodes.arrowright ||\n\t\tkeyCode == keyCodes.arrowleft ||\n\t\tkeyCode == keyCodes.arrowup ||\n\t\tkeyCode == keyCodes.arrowdown;\n}\n\n// Returns 'true' if provided (DOM) key event data corresponds with the Ctrl+A keystroke.\n//\n// @param {module:engine/view/observer/keyobserver~KeyEventData} domEventData\n// @returns {Boolean}\nfunction isSelectAllKeyCode( domEventData ) {\n\treturn getCode( domEventData ) == selectAllKeystrokeCode;\n}\n\n// Returns `true` when element is a nested editable or is placed inside one.\n//\n// @param {module:engine/view/element~Element}\n// @returns {Boolean}\nfunction isInsideNestedEditable( element ) {\n\twhile ( element ) {\n\t\tif ( element.is( 'editableElement' ) && !element.is( 'rootElement' ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Click on nested widget should select it.\n\t\tif ( isWidget( element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\telement = element.parent;\n\t}\n\n\treturn false;\n}\n\n// Checks whether the specified `element` is a child of the `parent` element.\n//\n// @param {module:engine/view/element~Element} element An element to check.\n// @param {module:engine/view/element~Element|null} parent A parent for the element.\n// @returns {Boolean}\nfunction isChild( element, parent ) {\n\tif ( !parent ) {\n\t\treturn false;\n\t}\n\n\treturn Array.from( element.getAncestors() ).includes( parent );\n}\n\n// Checks if enter key should insert paragraph. This should be done only on elements of type object (excluding inline objects).\n//\n// @param {module:engine/model/element~Element} element And element to check.\n// @param {module:engine/model/schema~Schema} schema\nfunction shouldInsertParagraph( element, schema ) {\n\treturn element && schema.isObject( element ) && !schema.isInline( element );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative/imagetextalternativecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { isImage } from '../image/utils';\n\n/**\n * The image text alternative command. It is used to change the `alt` attribute of `<image>` elements.\n *\n * @extends module:core/command~Command\n */\nexport default class ImageTextAlternativeCommand extends Command {\n\t/**\n\t * The command value: `false` if there is no `alt` attribute, otherwise the value of the `alt` attribute.\n\t *\n\t * @readonly\n\t * @observable\n\t * @member {String|Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst element = this.editor.model.document.selection.getSelectedElement();\n\n\t\tthis.isEnabled = isImage( element );\n\n\t\tif ( isImage( element ) && element.hasAttribute( 'alt' ) ) {\n\t\t\tthis.value = element.getAttribute( 'alt' );\n\t\t} else {\n\t\t\tthis.value = false;\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options\n\t * @param {String} options.newValue The new value of the `alt` attribute to set.\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\t\tconst imageElement = model.document.selection.getSelectedElement();\n\n\t\tmodel.change( writer => {\n\t\t\twriter.setAttribute( 'alt', options.newValue, imageElement );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative/imagetextalternativeediting\n */\n\nimport ImageTextAlternativeCommand from './imagetextalternativecommand';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The image text alternative editing plugin.\n *\n * Registers the `'imageTextAlternative'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternativeEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageTextAlternativeEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tthis.editor.commands.add( 'imageTextAlternative', new ImageTextAlternativeCommand( this.editor ) );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/labeledinput/labeledinputview\n */\n\nimport View from '../view';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\nimport LabelView from '../label/labelview';\nimport '../../theme/components/labeledinput/labeledinput.css';\n\n/**\n * The labeled input view class.\n *\n * @extends module:ui/view~View\n */\nexport default class LabeledInputView extends View {\n\t/**\n\t * Creates an instance of the labeled input view class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The locale instance.\n\t * @param {Function} InputView Constructor of the input view.\n\t */\n\tconstructor( locale, InputView ) {\n\t\tsuper( locale );\n\n\t\tconst inputUid = `ck-input-${ uid() }`;\n\t\tconst statusUid = `ck-status-${ uid() }`;\n\n\t\t/**\n\t\t * The text of the label.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #label\n\t\t */\n\t\tthis.set( 'label' );\n\n\t\t/**\n\t\t * The value of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * Controls whether the component is in read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * The validation error text. When set, it will be displayed\n\t\t * next to the {@link #inputView} as a typical validation error message.\n\t\t * Set it to `null` to hide the message.\n\t\t *\n\t\t * **Note:** Setting this property to anything but `null` will automatically\n\t\t * make the {@link module:ui/inputtext/inputtextview~InputTextView#hasError `hasError`}\n\t\t * of the {@link #inputView} `true`.\n\t\t *\n\t\t * **Note:** Typing in the {@link #inputView} which fires the\n\t\t * {@link module:ui/inputtext/inputtextview~InputTextView#event:input `input` event}\n\t\t * resets this property back to `null`, indicating that the input field can be re–validated.\n\t\t *\n\t\t * @observable\n\t\t * @member {String|null} #errorText\n\t\t */\n\t\tthis.set( 'errorText', null );\n\n\t\t/**\n\t\t * The additional information text displayed next to the {@link #inputView} which can\n\t\t * be used to inform the user about the purpose of the input, provide help or hints.\n\t\t *\n\t\t * Set it to `null` to hide the message.\n\t\t *\n\t\t * **Note:** This text will be displayed in the same place as {@link #errorText} but the\n\t\t * latter always takes precedence: if the {@link #errorText} is set, it replaces\n\t\t * {@link #errorText} for as long as the value of the input is invalid.\n\t\t *\n\t\t * @observable\n\t\t * @member {String|null} #infoText\n\t\t */\n\t\tthis.set( 'infoText', null );\n\n\t\t/**\n\t\t * The label view.\n\t\t *\n\t\t * @member {module:ui/label/labelview~LabelView} #labelView\n\t\t */\n\t\tthis.labelView = this._createLabelView( inputUid );\n\n\t\t/**\n\t\t * The input view.\n\t\t *\n\t\t * @member {module:ui/inputtext/inputtextview~InputTextView} #inputView\n\t\t */\n\t\tthis.inputView = this._createInputView( InputView, inputUid, statusUid );\n\n\t\t/**\n\t\t * The status view for the {@link #inputView}. It displays {@link #errorText} and\n\t\t * {@link #infoText}.\n\t\t *\n\t\t * @member {module:ui/view~View} #statusView\n\t\t */\n\t\tthis.statusView = this._createStatusView( statusUid );\n\n\t\t/**\n\t\t * The combined status text made of {@link #errorText} and {@link #infoText}.\n\t\t * Note that when present, {@link #errorText} always takes precedence in the\n\t\t * status.\n\t\t *\n\t\t * @see #errorText\n\t\t * @see #infoText\n\t\t * @see #statusView\n\t\t * @private\n\t\t * @observable\n\t\t * @member {String|null} #_statusText\n\t\t */\n\t\tthis.bind( '_statusText' ).to(\n\t\t\tthis, 'errorText',\n\t\t\tthis, 'infoText',\n\t\t\t( errorText, infoText ) => errorText || infoText\n\t\t);\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-labeled-input',\n\t\t\t\t\tbind.if( 'isReadOnly', 'ck-disabled' )\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis.labelView,\n\t\t\t\tthis.inputView,\n\t\t\t\tthis.statusView\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * Creates label view class instance and bind with view.\n\t *\n\t * @private\n\t * @param {String} id Unique id to set as labelView#for attribute.\n\t * @returns {module:ui/label/labelview~LabelView}\n\t */\n\t_createLabelView( id ) {\n\t\tconst labelView = new LabelView( this.locale );\n\n\t\tlabelView.for = id;\n\t\tlabelView.bind( 'text' ).to( this, 'label' );\n\n\t\treturn labelView;\n\t}\n\n\t/**\n\t * Creates input view class instance and bind with view.\n\t *\n\t * @private\n\t * @param {Function} InputView Input view constructor.\n\t * @param {String} inputUid Unique id to set as inputView#id attribute.\n\t * @param {String} statusUid Unique id of the status for the input's `aria-describedby` attribute.\n\t * @returns {module:ui/inputtext/inputtextview~InputTextView}\n\t */\n\t_createInputView( InputView, inputUid, statusUid ) {\n\t\tconst inputView = new InputView( this.locale, statusUid );\n\n\t\tinputView.id = inputUid;\n\t\tinputView.ariaDescribedById = statusUid;\n\t\tinputView.bind( 'value' ).to( this );\n\t\tinputView.bind( 'isReadOnly' ).to( this );\n\t\tinputView.bind( 'hasError' ).to( this, 'errorText', value => !!value );\n\n\t\tinputView.on( 'input', () => {\n\t\t\t// UX: Make the error text disappear and disable the error indicator as the user\n\t\t\t// starts fixing the errors.\n\t\t\tthis.errorText = null;\n\t\t} );\n\n\t\treturn inputView;\n\t}\n\n\t/**\n\t * Creates the status view instance. It displays {@link #errorText} and {@link #infoText}\n\t * next to the {@link #inputView}. See {@link #_statusText}.\n\t *\n\t * @private\n\t * @param {String} statusUid Unique id of the status, shared with the input's `aria-describedby` attribute.\n\t * @returns {module:ui/view~View}\n\t */\n\t_createStatusView( statusUid ) {\n\t\tconst statusView = new View( this.locale );\n\t\tconst bind = this.bindTemplate;\n\n\t\tstatusView.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-labeled-input__status',\n\t\t\t\t\tbind.if( 'errorText', 'ck-labeled-input__status_error' ),\n\t\t\t\t\tbind.if( '_statusText', 'ck-hidden', value => !value )\n\t\t\t\t],\n\t\t\t\tid: statusUid,\n\t\t\t\trole: bind.if( 'errorText', 'alert' )\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: bind.to( '_statusText' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn statusView;\n\t}\n\n\t/**\n\t * Moves the focus to the input and selects the value.\n\t */\n\tselect() {\n\t\tthis.inputView.select();\n\t}\n\n\t/**\n\t * Focuses the input.\n\t */\n\tfocus() {\n\t\tthis.inputView.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/inputtext/inputtextview\n */\n\nimport View from '../view';\nimport '../../theme/components/inputtext/inputtext.css';\n\n/**\n * The text input view class.\n *\n * @extends module:ui/view~View\n */\nexport default class InputTextView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The value of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * The `id` attribute of the input (i.e. to pair with a `<label>` element).\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #id\n\t\t */\n\t\tthis.set( 'id' );\n\n\t\t/**\n\t\t * The `placeholder` attribute of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #placeholder\n\t\t */\n\t\tthis.set( 'placeholder' );\n\n\t\t/**\n\t\t * Controls whether the input view is in read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * Set to `true` when the field has some error. Usually controlled via\n\t\t * {@link module:ui/labeledinput/labeledinputview~LabeledInputView#errorText}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #hasError\n\t\t */\n\t\tthis.set( 'hasError', false );\n\n\t\t/**\n\t\t * The `id` of the element describing this field, e.g. when it has\n\t\t * some error, it helps screen readers read the error text.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #ariaDescribedById\n\t\t */\n\t\tthis.set( 'ariaDescribedById' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'input',\n\t\t\tattributes: {\n\t\t\t\ttype: 'text',\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-input',\n\t\t\t\t\t'ck-input-text',\n\t\t\t\t\tbind.if( 'hasError', 'ck-error' )\n\t\t\t\t],\n\t\t\t\tid: bind.to( 'id' ),\n\t\t\t\tplaceholder: bind.to( 'placeholder' ),\n\t\t\t\treadonly: bind.to( 'isReadOnly' ),\n\t\t\t\t'aria-invalid': bind.if( 'hasError', true ),\n\t\t\t\t'aria-describedby': bind.to( 'ariaDescribedById' )\n\t\t\t},\n\t\t\ton: {\n\t\t\t\tinput: bind.to( 'input' )\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Fired when the user types in the input. Corresponds to the native\n\t\t * DOM `input` event.\n\t\t *\n\t\t * @event input\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tconst setValue = value => {\n\t\t\tthis.element.value = ( !value && value !== 0 ) ? '' : value;\n\t\t};\n\n\t\tsetValue( this.value );\n\n\t\t// Bind `this.value` to the DOM element's value.\n\t\t// We cannot use `value` DOM attribute because removing it on Edge does not clear the DOM element's value property.\n\t\tthis.on( 'change:value', ( evt, name, value ) => {\n\t\t\tsetValue( value );\n\t\t} );\n\t}\n\n\t/**\n\t * Moves the focus to the input and selects the value.\n\t */\n\tselect() {\n\t\tthis.element.select();\n\t}\n\n\t/**\n\t * Focuses the input.\n\t */\n\tfocus() {\n\t\tthis.element.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/submithandler\n */\n\n/**\n * A handler useful for {@link module:ui/view~View views} working as HTML forms. It intercepts a native DOM\n * `submit` event, prevents the default web browser behavior (navigation and page reload) and\n * fires the `submit` event on a view instead. Such a custom event can be then used by any\n * {@link module:utils/dom/emittermixin~Emitter emitter}, e.g. to serialize the form data.\n *\n *\t\timport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\n *\n *\t\t// ...\n *\n *\t\tclass AnyFormView extends View {\n *\t\t\tconstructor() {\n *\t\t\t\tsuper();\n *\n *\t\t\t\t// ...\n *\n *\t\t\t\tsubmitHandler( {\n *\t\t\t\t\tview: this\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n *\t\t// ...\n *\n *\t\tconst view = new AnyFormView();\n *\n *\t\t// A sample listener attached by an emitter working with the view.\n *\t\tthis.listenTo( view, 'submit', () => {\n *\t\t\tsaveTheFormData();\n *\t\t\thideTheForm();\n *\t\t} );\n *\n * @param {Object} [options] Configuration options.\n * @param {module:ui/view~View} options.view The view which DOM `submit` events should be handled.\n */\nexport default function submitHandler( { view } ) {\n\tview.listenTo( view.element, 'submit', ( evt, domEvt ) => {\n\t\tdomEvt.preventDefault();\n\t\tview.fire( 'submit' );\n\t}, { useCapture: true } );\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M6.972 16.615a.997.997 0 0 1-.744-.292l-4.596-4.596a1 1 0 1 1 1.414-1.414l3.926 3.926 9.937-9.937a1 1 0 0 1 1.414 1.415L7.717 16.323a.997.997 0 0 1-.745.292z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetextalternative/ui/textalternativeformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../../theme/textalternativeform.css';\n/**\n * The TextAlternativeFormView class.\n *\n * @extends module:ui/view~View\n */\nexport default class TextAlternativeFormView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = this.locale.t;\n /**\n\t\t * Tracks information about the DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * A textarea with a label.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView} #labeledTextarea\n\t\t */\n this.labeledInput = this._createLabeledInputView();\n /**\n\t\t * A button used to submit the form.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView} #saveButtonView\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * A button used to cancel the form.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView} #cancelButtonView\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of views which can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: [\n 'ck',\n 'ck-text-alternative-form'\n ],\n // https://github.com/ckeditor/ckeditor5-image/issues/40\n tabindex: '-1'\n },\n children: [\n this.labeledInput,\n this.saveButtonView,\n this.cancelButtonView\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n this.keystrokes.listenTo(this.element);\n submitHandler({ view: this });\n [\n this.labeledInput,\n this.saveButtonView,\n this.cancelButtonView\n ].forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n }\n /**\n\t * Creates the button view.\n\t *\n\t * @private\n\t * @param {String} label The button label\n\t * @param {String} icon The button's icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] The event name that the ButtonView#execute event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n /**\n\t * Creates an input with a label.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t */\n _createLabeledInputView() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n labeledInput.label = t('cd');\n labeledInput.inputView.placeholder = t('cd');\n return labeledInput;\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module ui/panel/balloon/balloonpanelview\n */\n\nimport View from '../../view';\nimport { getOptimalPosition } from '@ckeditor/ckeditor5-utils/src/dom/position';\nimport isRange from '@ckeditor/ckeditor5-utils/src/dom/isrange';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport { isElement } from 'lodash-es';\n\nimport '../../../theme/components/panel/balloonpanel.css';\n\nconst toPx = toUnit( 'px' );\nconst defaultLimiterElement = global.document.body;\n\n/**\n * The balloon panel view class.\n *\n * A floating container which can\n * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#pin pin} to any\n * {@link module:utils/dom/position~Options#target target} in the DOM and remain in that position\n * e.g. when the web page is scrolled.\n *\n * The balloon panel can be used to display contextual, non-blocking UI like forms, toolbars and\n * the like in its {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#content} view\n * collection.\n *\n * There is a number of {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}\n * that the balloon can use, automatically switching from one to another when the viewport space becomes\n * scarce to keep the balloon visible to the user as long as it is possible. The balloon will also\n * accept any custom position set provided by the user compatible with the\n * {@link module:utils/dom/position~Options options}.\n *\n *\t\tconst panel = new BalloonPanelView( locale );\n *\t\tconst childView = new ChildView();\n *\t\tconst positions = BalloonPanelView.defaultPositions;\n *\n *\t\tpanel.render();\n *\n *\t\t// Add a child view to the panel's content collection.\n *\t\tpanel.content.add( childView );\n *\n *\t\t// Start pinning the panel to an element with the \"target\" id DOM.\n *\t\t// The balloon will remain pinned until unpin() is called.\n *\t\tpanel.pin( {\n *\t\t\ttarget: document.querySelector( '#target' ),\n *\t\t\tpositions: [\n *\t\t\t\tpositions.northArrowSouth,\n *\t\t\t\tpositions.southArrowNorth\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:ui/view~View\n */\nexport default class BalloonPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * The absolute top position of the balloon panel in pixels.\n\t\t *\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #top\n\t\t */\n\t\tthis.set( 'top', 0 );\n\n\t\t/**\n\t\t * The absolute left position of the balloon panel in pixels.\n\t\t *\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #left\n\t\t */\n\t\tthis.set( 'left', 0 );\n\n\t\t/**\n\t\t * The balloon panel's current position. The position name is reflected in the CSS class set\n\t\t * to the balloon, i.e. `.ck-balloon-panel_arrow_nw` for the \"arrow_nw\" position. The class\n\t\t * controls the minor aspects of the balloon's visual appearance like the placement\n\t\t * of an {@link #withArrow arrow}. To support a new position, an additional CSS must be created.\n\t\t *\n\t\t * Default position names correspond with\n\t\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t\t *\n\t\t * See the {@link #attachTo} and {@link #pin} methods to learn about custom balloon positions.\n\t\t *\n\t\t * @observable\n\t\t * @default 'arrow_nw'\n\t\t * @member {'arrow_nw'|'arrow_ne'|'arrow_sw'|'arrow_se'} #position\n\t\t */\n\t\tthis.set( 'position', 'arrow_nw' );\n\n\t\t/**\n\t\t * Controls whether the balloon panel is visible or not.\n\t\t *\n\t\t * @observable\n\t\t * @default false\n\t\t * @member {Boolean} #isVisible\n\t\t */\n\t\tthis.set( 'isVisible', false );\n\n\t\t/**\n\t\t * Controls whether the balloon panel has an arrow. The presence of the arrow\n\t\t * is reflected in the `ck-balloon-panel_with-arrow` CSS class.\n\t\t *\n\t\t * @observable\n\t\t * @default true\n\t\t * @member {Boolean} #withArrow\n\t\t */\n\t\tthis.set( 'withArrow', true );\n\n\t\t/**\n\t\t * An additional CSS class added to the {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n\t\tthis.set( 'class' );\n\n\t\t/**\n\t\t * A callback that starts pinning the panel when {@link #isVisible} gets\n\t\t * `true`. Used by {@link #pin}.\n\t\t *\n\t\t * @private\n\t\t * @member {Function} #_pinWhenIsVisibleCallback\n\t\t */\n\n\t\t/**\n\t\t * A collection of the child views that creates the balloon panel contents.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.content = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-balloon-panel',\n\t\t\t\t\tbind.to( 'position', value => `ck-balloon-panel_${ value }` ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-balloon-panel_visible' ),\n\t\t\t\t\tbind.if( 'withArrow', 'ck-balloon-panel_with-arrow' ),\n\t\t\t\t\tbind.to( 'class' )\n\t\t\t\t],\n\n\t\t\t\tstyle: {\n\t\t\t\t\ttop: bind.to( 'top', toPx ),\n\t\t\t\t\tleft: bind.to( 'left', toPx )\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tchildren: this.content\n\t\t} );\n\t}\n\n\t/**\n\t * Shows the panel.\n\t *\n\t * See {@link #isVisible}.\n\t */\n\tshow() {\n\t\tthis.isVisible = true;\n\t}\n\n\t/**\n\t * Hides the panel.\n\t *\n\t * See {@link #isVisible}.\n\t */\n\thide() {\n\t\tthis.isVisible = false;\n\t}\n\n\t/**\n\t * Attaches the panel to a specified {@link module:utils/dom/position~Options#target} with a\n\t * smart positioning heuristics that chooses from available positions to make sure the panel\n\t * is visible to the user i.e. within the limits of the viewport.\n\t *\n\t * This method accepts configuration {@link module:utils/dom/position~Options options}\n\t * to set the `target`, optional `limiter` and `positions` the balloon should choose from.\n\t *\n\t *\t\tconst panel = new BalloonPanelView( locale );\n\t *\t\tconst positions = BalloonPanelView.defaultPositions;\n\t *\n\t *\t\tpanel.render();\n\t *\n\t *\t\t// Attach the panel to an element with the \"target\" id DOM.\n\t *\t\tpanel.attachTo( {\n\t *\t\t\ttarget: document.querySelector( '#target' ),\n\t *\t\t\tpositions: [\n\t *\t\t\t\tpositions.northArrowSouth,\n\t *\t\t\t\tpositions.southArrowNorth\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t * **Note**: Attaching the panel will also automatically {@link #show} it.\n\t *\n\t * **Note**: An attached panel will not follow its target when the window is scrolled or resized.\n\t * See the {@link #pin} method for a more permanent positioning strategy.\n\t *\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}. Default `positions` array is\n\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t */\n\tattachTo( options ) {\n\t\tthis.show();\n\n\t\tconst defaultPositions = BalloonPanelView.defaultPositions;\n\t\tconst positionOptions = Object.assign( {}, {\n\t\t\telement: this.element,\n\t\t\tpositions: [\n\t\t\t\tdefaultPositions.southArrowNorth,\n\t\t\t\tdefaultPositions.southArrowNorthWest,\n\t\t\t\tdefaultPositions.southArrowNorthEast,\n\t\t\t\tdefaultPositions.northArrowSouth,\n\t\t\t\tdefaultPositions.northArrowSouthWest,\n\t\t\t\tdefaultPositions.northArrowSouthEast\n\t\t\t],\n\t\t\tlimiter: defaultLimiterElement,\n\t\t\tfitInViewport: true\n\t\t}, options );\n\n\t\tconst optimalPosition = BalloonPanelView._getOptimalPosition( positionOptions );\n\n\t\t// Usually browsers make some problems with super accurate values like 104.345px\n\t\t// so it is better to use int values.\n\t\tconst left = parseInt( optimalPosition.left );\n\t\tconst top = parseInt( optimalPosition.top );\n\t\tconst position = optimalPosition.name;\n\n\t\tObject.assign( this, { top, left, position } );\n\t}\n\n\t/**\n\t * Works the same way as the {@link #attachTo} method except that the position of the panel is\n\t * continuously updated when:\n\t *\n\t * * any ancestor of the {@link module:utils/dom/position~Options#target}\n\t * or {@link module:utils/dom/position~Options#limiter} is scrolled,\n\t * * the browser window gets resized or scrolled.\n\t *\n\t * Thanks to that, the panel always sticks to the {@link module:utils/dom/position~Options#target}\n\t * and is immune to the changing environment.\n\t *\n\t *\t\tconst panel = new BalloonPanelView( locale );\n\t *\t\tconst positions = BalloonPanelView.defaultPositions;\n\t *\n\t *\t\tpanel.render();\n\t *\n\t *\t\t// Pin the panel to an element with the \"target\" id DOM.\n\t *\t\tpanel.pin( {\n\t *\t\t\ttarget: document.querySelector( '#target' ),\n\t *\t\t\tpositions: [\n\t *\t\t\t\tpositions.northArrowSouth,\n\t *\t\t\t\tpositions.southArrowNorth\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t * To leave the pinned state, use the {@link #unpin} method.\n\t *\n\t * **Note**: Pinning the panel will also automatically {@link #show} it.\n\t *\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}. Default `positions` array is\n\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t */\n\tpin( options ) {\n\t\tthis.unpin();\n\n\t\tthis._pinWhenIsVisibleCallback = () => {\n\t\t\tif ( this.isVisible ) {\n\t\t\t\tthis._startPinning( options );\n\t\t\t} else {\n\t\t\t\tthis._stopPinning();\n\t\t\t}\n\t\t};\n\n\t\tthis._startPinning( options );\n\n\t\t// Control the state of the listeners depending on whether the panel is visible\n\t\t// or not.\n\t\t// TODO: Use on() (https://github.com/ckeditor/ckeditor5-utils/issues/144).\n\t\tthis.listenTo( this, 'change:isVisible', this._pinWhenIsVisibleCallback );\n\t}\n\n\t/**\n\t * Stops pinning the panel, as set up by {@link #pin}.\n\t */\n\tunpin() {\n\t\tif ( this._pinWhenIsVisibleCallback ) {\n\t\t\t// Deactivate listeners attached by pin().\n\t\t\tthis._stopPinning();\n\n\t\t\t// Deactivate the panel pin() control logic.\n\t\t\t// TODO: Use off() (https://github.com/ckeditor/ckeditor5-utils/issues/144).\n\t\t\tthis.stopListening( this, 'change:isVisible', this._pinWhenIsVisibleCallback );\n\n\t\t\tthis._pinWhenIsVisibleCallback = null;\n\n\t\t\tthis.hide();\n\t\t}\n\t}\n\n\t/**\n\t * Starts managing the pinned state of the panel. See {@link #pin}.\n\t *\n\t * @private\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}.\n\t */\n\t_startPinning( options ) {\n\t\tthis.attachTo( options );\n\n\t\tconst targetElement = getDomElement( options.target );\n\t\tconst limiterElement = options.limiter ? getDomElement( options.limiter ) : defaultLimiterElement;\n\n\t\t// Then we need to listen on scroll event of eny element in the document.\n\t\tthis.listenTo( global.document, 'scroll', ( evt, domEvt ) => {\n\t\t\tconst scrollTarget = domEvt.target;\n\n\t\t\t// The position needs to be updated if the positioning target is within the scrolled element.\n\t\t\tconst isWithinScrollTarget = targetElement && scrollTarget.contains( targetElement );\n\n\t\t\t// The position needs to be updated if the positioning limiter is within the scrolled element.\n\t\t\tconst isLimiterWithinScrollTarget = limiterElement && scrollTarget.contains( limiterElement );\n\n\t\t\t// The positioning target and/or limiter can be a Rect, object etc..\n\t\t\t// There's no way to optimize the listener then.\n\t\t\tif ( isWithinScrollTarget || isLimiterWithinScrollTarget || !targetElement || !limiterElement ) {\n\t\t\t\tthis.attachTo( options );\n\t\t\t}\n\t\t}, { useCapture: true } );\n\n\t\t// We need to listen on window resize event and update position.\n\t\tthis.listenTo( global.window, 'resize', () => {\n\t\t\tthis.attachTo( options );\n\t\t} );\n\t}\n\n\t/**\n\t * Stops managing the pinned state of the panel. See {@link #pin}.\n\t *\n\t * @private\n\t */\n\t_stopPinning() {\n\t\tthis.stopListening( global.document, 'scroll' );\n\t\tthis.stopListening( global.window, 'resize' );\n\t}\n}\n\n// Returns the DOM element for given object or null, if there is none,\n// e.g. when the passed object is a Rect instance or so.\n//\n// @private\n// @param {*} object\n// @returns {HTMLElement|null}\nfunction getDomElement( object ) {\n\tif ( isElement( object ) ) {\n\t\treturn object;\n\t}\n\n\tif ( isRange( object ) ) {\n\t\treturn object.commonAncestorContainer;\n\t}\n\n\tif ( typeof object == 'function' ) {\n\t\treturn getDomElement( object() );\n\t}\n\n\treturn null;\n}\n\n/**\n * A horizontal offset of the arrow tip from the edge of the balloon. Controlled by CSS.\n *\n *\t\t +-----|---------...\n *\t\t | |\n *\t\t | |\n *\t\t | |\n *\t\t | |\n *\t\t +--+ | +------...\n *\t\t \\ | /\n *\t\t \\|/\n *\t >|-----|<---------------- horizontal offset\n *\n * @default 30\n * @member {Number} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.arrowHorizontalOffset\n */\nBalloonPanelView.arrowHorizontalOffset = 25;\n\n/**\n * A vertical offset of the arrow from the edge of the balloon. Controlled by CSS.\n *\n *\t\t +-------------...\n *\t\t |\n *\t\t |\n *\t\t | /-- vertical offset\n *\t\t | V\n *\t\t +--+ +-----... ---------\n *\t\t \\ / |\n *\t\t \\/ |\n *\t\t-------------------------------\n *\t\t ^\n *\n * @default 15\n * @member {Number} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.arrowVerticalOffset\n */\nBalloonPanelView.arrowVerticalOffset = 10;\n\n/**\n * Function used to calculate the optimal position for the balloon.\n *\n * @protected\n * @member {Function} module:ui/panel/balloon/balloonpanelview~BalloonPanelView._getOptimalPosition\n */\nBalloonPanelView._getOptimalPosition = getOptimalPosition;\n\n/**\n * A default set of positioning functions used by the balloon panel view\n * when attaching using the {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#attachTo} method.\n *\n * The available positioning functions are as follows:\n *\n * **North**\n *\n * * `northArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northArrowSouthWest`\n *\n * \t\t +-----------------+\n * \t\t | Balloon |\n * \t\t +-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * **North west**\n *\n * * `northWestArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northWestArrowSouthWest`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northWestArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * **North east**\n *\n * * `northEastArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * * `northEastArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northEastArrowSouthWest`\n *\n * \t\t +-----------------+\n * \t\t | Balloon |\n * \t\t +-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * **South**\n *\n * * `southArrowNorth`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southArrowNorthWest`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t +-----------------+\n *\t\t | Balloon |\n *\t\t +-----------------+\n *\n * **South west**\n *\n * * `southWestArrowNorth`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southWestArrowNorthWest`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southWestArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * **South east**\n *\n * * `southEastArrowNorth`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southEastArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southEastArrowNorthWest`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t +-----------------+\n *\t\t | Balloon |\n *\t\t +-----------------+\n *\n * See {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#attachTo}.\n *\n * Positioning functions must be compatible with {@link module:utils/dom/position~Position}.\n *\n * The name that the position function returns will be reflected in the balloon panel's class that\n * controls the placement of the \"arrow\". See {@link #position} to learn more.\n *\n * @member {Object} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions\n */\nBalloonPanelView.defaultPositions = {\n\t// ------- North\n\n\tnorthArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\tnorthArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\t// ------- North west\n\n\tnorthWestArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthWestArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\tnorthWestArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\t// ------- North east\n\n\tnorthEastArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthEastArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\tnorthEastArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\t// ------- South\n\n\tsouthArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\tsouthArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n\n\t// ------- South west\n\n\tsouthWestArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthWestArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n\n\tsouthWestArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\t// ------- South east\n\n\tsouthEastArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthEastArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\tsouthEastArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n};\n\n// Returns the top coordinate for positions starting with `north*`.\n//\n// @private\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of the balloon.\n// @returns {Number}\nfunction getNorthTop( targetRect, balloonRect ) {\n\treturn targetRect.top - balloonRect.height - BalloonPanelView.arrowVerticalOffset;\n}\n\n// Returns the top coordinate for positions starting with `south*`.\n//\n// @private\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of the balloon.\n// @returns {Number}\nfunction getSouthTop( targetRect ) {\n\treturn targetRect.bottom + BalloonPanelView.arrowVerticalOffset;\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.463 5.187a.888.888 0 1 1 1.254 1.255L9.16 10l3.557 3.557a.888.888 0 1 1-1.254 1.255L7.26 10.61a.888.888 0 0 1 .16-1.382l4.043-4.042z\\\" /></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/panel/balloon/contextualballoon\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BalloonPanelView from './balloonpanelview';\nimport View from '../../view';\nimport ButtonView from '../../button/buttonview';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\nimport Rect from '@ckeditor/ckeditor5-utils/src/dom/rect';\nimport prevIcon from '../../../theme/icons/previous-arrow.svg';\nimport nextIcon from '../../../theme/icons/next-arrow.svg';\nimport '../../../theme/components/panel/balloonrotator.css';\nimport '../../../theme/components/panel/fakepanel.css';\nconst toPx = toUnit('px');\n/**\n * Provides the common contextual balloon for the editor.\n *\n * The role of this plugin is to unify the contextual balloons logic, simplify views management and help\n * avoid the unnecessary complexity of handling multiple {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView}\n * instances in the editor.\n *\n * This plugin allows for creating single or multiple panel stacks.\n *\n * Each stack may have multiple views, with the one on the top being visible. When the visible view is removed from the stack,\n * the previous view becomes visible.\n *\n * It might be useful to implement nested navigation in a balloon. For instance, a toolbar view may contain a link button.\n * When you click it, a link view (which lets you set the URL) is created and put on top of the toolbar view, so the link panel\n * is displayed. When you finish editing the link and close (remove) the link view, the toolbar view is visible again.\n *\n * However, there are cases when there are multiple independent balloons to be displayed, for instance, if the selection\n * is inside two inline comments at the same time. For such cases, you can create two independent panel stacks.\n * The contextual balloon plugin will create a navigation bar to let the users switch between these panel stacks using the \"Next\"\n * and \"Previous\" buttons.\n *\n * If there are no views in the current stack, the balloon panel will try to switch to the next stack. If there are no\n * panels in any stack, the balloon panel will be hidden.\n *\n * **Note**: To force the balloon panel to show only one view, even if there are other stacks, use the `singleViewMode=true` option\n * when {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon#add adding} a view to a panel.\n *\n * From the implementation point of view, the contextual ballon plugin is reusing a single\n * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView} instance to display multiple contextual balloon\n * panels in the editor. It also creates a special {@link module:ui/panel/balloon/contextualballoon~RotatorView rotator view},\n * used to manage multiple panel stacks. Rotator view is a child of the balloon panel view and the parent of the specific\n * view you want to display. If there is more than one panel stack to be displayed, the rotator view will add a\n * navigation bar. If there is only one stack, the rotator view is transparent (it does not add any UI elements).\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ContextualBalloon extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ContextualBalloon';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n /**\n\t\t * The {@link module:utils/dom/position~Options#limiter position limiter}\n\t\t * for the {@link #view balloon}, used when no `limiter` has been passed into {@link #add}\n\t\t * or {@link #updatePosition}.\n\t\t *\n\t\t * By default, a function that obtains the farthest DOM\n\t\t * {@link module:engine/view/rooteditableelement~RootEditableElement}\n\t\t * of the {@link module:engine/view/document~Document#selection}.\n\t\t *\n\t\t * @member {module:utils/dom/position~Options#limiter} #positionLimiter\n\t\t */\n this.positionLimiter = () => {\n const view = this.editor.editing.view;\n const viewDocument = view.document;\n const editableElement = viewDocument.selection.editableElement;\n if (editableElement) {\n return view.domConverter.mapViewToDom(editableElement.root);\n }\n return null;\n };\n /**\n\t\t * The currently visible view or `null` when there are no views in any stack.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {module:ui/view~View|null} #visibleView\n\t\t */\n this.set('visibleView', null);\n /**\n\t\t * The common balloon panel view.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/panel/balloon/balloonpanelview~BalloonPanelView} #view\n\t\t */\n this.view = new BalloonPanelView(editor.locale);\n editor.ui.view.body.add(this.view);\n editor.ui.focusTracker.add(this.view.element);\n /**\n\t\t * The map of views and their stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<module:ui/view~View,Set>}\n\t\t */\n this._viewToStack = new Map();\n /**\n\t\t * The map of IDs and stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<String,Set>}\n\t\t */\n this._idToStack = new Map();\n /**\n\t\t * A total number of all stacks in the balloon.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #_numberOfStacks\n\t\t */\n this.set('_numberOfStacks', 0);\n /**\n\t\t * A flag that controls the single view mode.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_singleViewMode\n\t\t */\n this.set('_singleViewMode', false);\n /**\n\t\t * Rotator view embedded in the contextual balloon.\n\t\t * Displays the currently visible view in the balloon and provides navigation for switching stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {module:ui/panel/balloon/contextualballoon~RotatorView}\n\t\t */\n this._rotatorView = this._createRotatorView();\n /**\n\t\t * Displays fake panels under the balloon panel view when multiple stacks are added to the balloon.\n\t\t *\n\t\t * @private\n\t\t * @type {module:ui/view~View}\n\t\t */\n this._fakePanelsView = this._createFakePanelsView();\n }\n /**\n\t * Returns `true` when the given view is in one of the stacks. Otherwise returns `false`.\n\t *\n\t * @param {module:ui/view~View} view\n\t * @returns {Boolean}\n\t */\n hasView(view) {\n return Array.from(this._viewToStack.keys()).includes(view);\n }\n /**\n\t * Adds a new view to the stack and makes it visible if the current stack is visible\n\t * or it is the first view in the balloon.\n\t *\n\t * @param {Object} data The configuration of the view.\n\t * @param {String} [data.stackId='main'] The ID of the stack that the view is added to.\n\t * @param {module:ui/view~View} [data.view] The content of the balloon.\n\t * @param {module:utils/dom/position~Options} [data.position] Positioning options.\n\t * @param {String} [data.balloonClassName] An additional CSS class added to the {@link #view balloon} when visible.\n\t * @param {Boolean} [data.withArrow=true] Whether the {@link #view balloon} should be rendered with an arrow.\n\t * @param {Boolean} [data.singleViewMode=false] Whether the view should be the only visible view even if other stacks were added.\n\t */\n add(data) {\n if (this.hasView(data.view)) {\n /**\n\t\t\t * Trying to add configuration of the same view more than once.\n\t\t\t *\n\t\t\t * @error contextualballoon-add-view-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-add-view-exist: Cannot add configuration of the same view twice.', [\n this,\n data\n ]);\n }\n const stackId = data.stackId || 'main';\n // If new stack is added, creates it and show view from this stack.\n if (!this._idToStack.has(stackId)) {\n this._idToStack.set(stackId, new Map([[\n data.view,\n data\n ]]));\n this._viewToStack.set(data.view, this._idToStack.get(stackId));\n this._numberOfStacks = this._idToStack.size;\n if (!this._visibleStack || data.singleViewMode) {\n this.showStack(stackId);\n }\n return;\n }\n const stack = this._idToStack.get(stackId);\n if (data.singleViewMode) {\n this.showStack(stackId);\n }\n // Add new view to the stack.\n stack.set(data.view, data);\n this._viewToStack.set(data.view, stack);\n // And display it if is added to the currently visible stack.\n if (stack === this._visibleStack) {\n this._showView(data);\n }\n }\n /**\n\t * Removes the given view from the stack. If the removed view was visible,\n\t * the view preceding it in the stack will become visible instead.\n\t * When there is no view in the stack, the next stack will be displayed.\n\t * When there are no more stacks, the balloon will hide.\n\t *\n\t * @param {module:ui/view~View} view A view to be removed from the balloon.\n\t */\n remove(view) {\n if (!this.hasView(view)) {\n /**\n\t\t\t * Trying to remove the configuration of the view not defined in the stack.\n\t\t\t *\n\t\t\t * @error contextualballoon-remove-view-not-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-remove-view-not-exist: Cannot remove the configuration of a non-existent view.', [\n this,\n view\n ]);\n }\n const stack = this._viewToStack.get(view);\n if (this._singleViewMode && this.visibleView === view) {\n this._singleViewMode = false;\n }\n // When visible view will be removed we need to show a preceding view or next stack\n // if a view is the only view in the stack.\n if (this.visibleView === view) {\n if (stack.size === 1) {\n if (this._idToStack.size > 1) {\n this._showNextStack();\n } else {\n this.view.hide();\n this.visibleView = null;\n this._rotatorView.hideView();\n }\n } else {\n this._showView(Array.from(stack.values())[stack.size - 2]);\n }\n }\n if (stack.size === 1) {\n this._idToStack.delete(this._getStackId(stack));\n this._numberOfStacks = this._idToStack.size;\n } else {\n stack.delete(view);\n }\n this._viewToStack.delete(view);\n }\n /**\n\t * Updates the position of the balloon using the position data of the first visible view in the stack.\n\t * When new position data is given, the position data of the currently visible view will be updated.\n\t *\n\t * @param {module:utils/dom/position~Options} [position] position options.\n\t */\n updatePosition(position) {\n if (position) {\n this._visibleStack.get(this.visibleView).position = position;\n }\n this.view.pin(this._getBalloonPosition());\n this._fakePanelsView.updatePosition();\n }\n /**\n\t * Shows the last view from the stack of a given ID.\n\t *\n\t * @param {String} id\n\t */\n showStack(id) {\n this.visibleStack = id;\n const stack = this._idToStack.get(id);\n if (!stack) {\n /**\n\t\t\t * Trying to show a stack that does not exist.\n\t\t\t *\n\t\t\t * @error contextualballoon-showstack-stack-not-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-showstack-stack-not-exist: Cannot show a stack that does not exist.', this);\n }\n if (this._visibleStack === stack) {\n return;\n }\n this._showView(Array.from(stack.values()).pop());\n }\n /**\n\t * Returns the stack of the currently visible view.\n\t *\n\t * @private\n\t * @type {Set}\n\t */\n get _visibleStack() {\n return this._viewToStack.get(this.visibleView);\n }\n /**\n\t * Returns the ID of the given stack.\n\t *\n\t * @private\n\t * @param {Set} stack\n\t * @returns {String}\n\t */\n _getStackId(stack) {\n const entry = Array.from(this._idToStack.entries()).find(entry => entry[1] === stack);\n return entry[0];\n }\n /**\n\t * Shows the last view from the next stack.\n\t *\n\t * @private\n\t */\n _showNextStack() {\n const stacks = Array.from(this._idToStack.values());\n let nextIndex = stacks.indexOf(this._visibleStack) + 1;\n if (!stacks[nextIndex]) {\n nextIndex = 0;\n }\n this.showStack(this._getStackId(stacks[nextIndex]));\n }\n /**\n\t * Shows the last view from the previous stack.\n\t *\n\t * @private\n\t */\n _showPrevStack() {\n const stacks = Array.from(this._idToStack.values());\n let nextIndex = stacks.indexOf(this._visibleStack) - 1;\n if (!stacks[nextIndex]) {\n nextIndex = stacks.length - 1;\n }\n this.showStack(this._getStackId(stacks[nextIndex]));\n }\n /**\n\t * Creates a rotator view.\n\t *\n\t * @private\n\t * @returns {module:ui/panel/balloon/contextualballoon~RotatorView}\n\t */\n _createRotatorView() {\n const view = new RotatorView(this.editor.locale);\n const t = this.editor.locale.t;\n this.view.content.add(view);\n // Hide navigation when there is only a one stack & not in single view mode.\n view.bind('isNavigationVisible').to(this, '_numberOfStacks', this, '_singleViewMode', (value, isSingleViewMode) => {\n return !isSingleViewMode && value > 1;\n });\n // Update balloon position after toggling navigation.\n view.on('change:isNavigationVisible', () => this.updatePosition(), { priority: 'low' });\n // Update stacks counter value.\n view.bind('counter').to(this, 'visibleView', this, '_numberOfStacks', (visibleView, numberOfStacks) => {\n if (numberOfStacks < 2) {\n return '';\n }\n const current = Array.from(this._idToStack.values()).indexOf(this._visibleStack) + 1;\n return t('bn', [\n current,\n numberOfStacks\n ]);\n });\n view.buttonNextView.on('execute', () => {\n // When current view has a focus then move focus to the editable before removing it,\n // otherwise editor will lost focus.\n if (view.focusTracker.isFocused) {\n this.editor.editing.view.focus();\n }\n this._showNextStack();\n });\n view.buttonPrevView.on('execute', () => {\n // When current view has a focus then move focus to the editable before removing it,\n // otherwise editor will lost focus.\n if (view.focusTracker.isFocused) {\n this.editor.editing.view.focus();\n }\n this._showPrevStack();\n });\n return view;\n }\n /**\n\t * @returns {module:ui/view~View}\n\t */\n _createFakePanelsView() {\n const view = new FakePanelsView(this.editor.locale, this.view);\n view.bind('numberOfPanels').to(this, '_numberOfStacks', this, '_singleViewMode', (number, isSingleViewMode) => {\n const showPanels = !isSingleViewMode && number >= 2;\n return showPanels ? Math.min(number - 1, 2) : 0;\n });\n view.listenTo(this.view, 'change:top', () => view.updatePosition());\n view.listenTo(this.view, 'change:left', () => view.updatePosition());\n this.editor.ui.view.body.add(view);\n return view;\n }\n /**\n\t * Sets the view as the content of the balloon and attaches the balloon using position\n\t * options of the first view.\n\t *\n\t * @private\n\t * @param {Object} data Configuration.\n\t * @param {module:ui/view~View} [data.view] The view to show in the balloon.\n\t * @param {String} [data.balloonClassName=''] Additional class name which will be added to the {@link #view balloon}.\n\t * @param {Boolean} [data.withArrow=true] Whether the {@link #view balloon} should be rendered with an arrow.\n\t */\n _showView({view, balloonClassName = '', withArrow = true, singleViewMode = false}) {\n this.view.class = balloonClassName;\n this.view.withArrow = withArrow;\n this._rotatorView.showView(view);\n this.visibleView = view;\n this.view.pin(this._getBalloonPosition());\n this._fakePanelsView.updatePosition();\n if (singleViewMode) {\n this._singleViewMode = true;\n }\n }\n /**\n\t * Returns position options of the last view in the stack.\n\t * This keeps the balloon in the same position when the view is changed.\n\t *\n\t * @private\n\t * @returns {module:utils/dom/position~Options}\n\t */\n _getBalloonPosition() {\n let position = Array.from(this._visibleStack.values()).pop().position;\n // Use the default limiter if none has been specified.\n if (position && !position.limiter) {\n // Don't modify the original options object.\n position = Object.assign({}, position, { limiter: this.positionLimiter });\n }\n return position;\n }\n}\n/**\n * Rotator view is a helper class for the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon ContextualBalloon}.\n * It is used for displaying the last view from the current stack and providing navigation buttons for switching stacks.\n * See the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon ContextualBalloon} documentation to learn more.\n *\n * @extends module:ui/view~View\n */\nclass RotatorView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = locale.t;\n const bind = this.bindTemplate;\n /**\n\t\t * Defines whether navigation is visible or not.\n\t\t *\n\t\t * @member {Boolean} #isNavigationVisible\n\t\t */\n this.set('isNavigationVisible', true);\n /**\n\t\t * Used for checking if a view is focused or not.\n\t\t *\n\t\t * @type {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * Navigation button for switching the stack to the previous one.\n\t\t *\n\t\t * @type {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.buttonPrevView = this._createButtonView(t('bo'), prevIcon);\n /**\n\t\t * Navigation button for switching the stack to the next one.\n\t\t *\n\t\t * @type {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.buttonNextView = this._createButtonView(t('bp'), nextIcon);\n /**\n\t\t * A collection of the child views that creates the rotator content.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.content = this.createCollection();\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-balloon-rotator'\n ],\n 'z-index': '-1'\n },\n children: [\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck-balloon-rotator__navigation',\n bind.to('isNavigationVisible', value => value ? '' : 'ck-hidden')\n ]\n },\n children: [\n this.buttonPrevView,\n {\n tag: 'span',\n attributes: { class: ['ck-balloon-rotator__counter'] },\n children: [{ text: bind.to('counter') }]\n },\n this.buttonNextView\n ]\n },\n {\n tag: 'div',\n attributes: { class: 'ck-balloon-rotator__content' },\n children: this.content\n }\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n this.focusTracker.add(this.element);\n }\n /**\n\t * Shows a given view.\n\t *\n\t * @param {module:ui/view~View} view The view to show.\n\t */\n showView(view) {\n this.hideView();\n this.content.add(view);\n }\n /**\n\t * Hides the currently displayed view.\n\t */\n hideView() {\n this.content.clear();\n }\n /**\n\t * Creates a navigation button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @returns {module:ui/button/buttonview~ButtonView}\n\t */\n _createButtonView(label, icon) {\n const view = new ButtonView(this.locale);\n view.set({\n label,\n icon,\n tooltip: true\n });\n return view;\n }\n}\n// Displays additional layers under the balloon when multiple stacks are added to the balloon.\n//\n// @private\n// @extends module:ui/view~View\nclass FakePanelsView extends View {\n // @inheritDoc\n constructor(locale, balloonPanelView) {\n super(locale);\n const bind = this.bindTemplate;\n // Fake panels top offset.\n //\n // @observable\n // @member {Number} #top\n this.set('top', 0);\n // Fake panels left offset.\n //\n // @observable\n // @member {Number} #left\n this.set('left', 0);\n // Fake panels height.\n //\n // @observable\n // @member {Number} #height\n this.set('height', 0);\n // Fake panels width.\n //\n // @observable\n // @member {Number} #width\n this.set('width', 0);\n // Number of rendered fake panels.\n //\n // @observable\n // @member {Number} #numberOfPanels\n this.set('numberOfPanels', 0);\n // Collection of the child views which creates fake panel content.\n //\n // @readonly\n // @type {module:ui/viewcollection~ViewCollection}\n this.content = this.createCollection();\n // Context.\n //\n // @private\n // @type {module:ui/panel/balloon/balloonpanelview~BalloonPanelView}\n this._balloonPanelView = balloonPanelView;\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck-fake-panel',\n bind.to('numberOfPanels', number => number ? '' : 'ck-hidden')\n ],\n style: {\n top: bind.to('top', toPx),\n left: bind.to('left', toPx),\n width: bind.to('width', toPx),\n height: bind.to('height', toPx)\n }\n },\n children: this.content\n });\n this.on('change:numberOfPanels', (evt, name, next, prev) => {\n if (next > prev) {\n this._addPanels(next - prev);\n } else {\n this._removePanels(prev - next);\n }\n this.updatePosition();\n });\n }\n // @private\n // @param {Number} number\n _addPanels(number) {\n while (number--) {\n const view = new View();\n view.setTemplate({ tag: 'div' });\n this.content.add(view);\n this.registerChild(view);\n }\n }\n // @private\n // @param {Number} number\n _removePanels(number) {\n while (number--) {\n const view = this.content.last;\n this.content.remove(view);\n this.deregisterChild(view);\n view.destroy();\n }\n }\n // Updates coordinates of fake panels.\n updatePosition() {\n if (this.numberOfPanels) {\n const {top, left} = this._balloonPanelView;\n const {width, height} = new Rect(this._balloonPanelView.element);\n Object.assign(this, {\n top,\n left,\n width,\n height\n });\n }\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/ui/utils\n */\n\nimport BalloonPanelView from '@ckeditor/ckeditor5-ui/src/panel/balloon/balloonpanelview';\nimport { getSelectedImageWidget } from '../utils';\n\n/**\n * A helper utility that positions the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} instance\n * with respect to the image in the editor content, if one is selected.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport function repositionContextualBalloon( editor ) {\n\tconst balloon = editor.plugins.get( 'ContextualBalloon' );\n\n\tif ( getSelectedImageWidget( editor.editing.view.document.selection ) ) {\n\t\tconst position = getBalloonPositionData( editor );\n\n\t\tballoon.updatePosition( position );\n\t}\n}\n\n/**\n * Returns the positioning options that control the geometry of the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} with respect\n * to the selected element in the editor content.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n * @returns {module:utils/dom/position~Options}\n */\nexport function getBalloonPositionData( editor ) {\n\tconst editingView = editor.editing.view;\n\tconst defaultPositions = BalloonPanelView.defaultPositions;\n\n\treturn {\n\t\ttarget: editingView.domConverter.viewToDom( editingView.document.selection.getSelectedElement() ),\n\t\tpositions: [\n\t\t\tdefaultPositions.northArrowSouth,\n\t\t\tdefaultPositions.northArrowSouthWest,\n\t\t\tdefaultPositions.northArrowSouthEast,\n\t\t\tdefaultPositions.southArrowNorth,\n\t\t\tdefaultPositions.southArrowNorthWest,\n\t\t\tdefaultPositions.southArrowNorthEast\n\t\t]\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetextalternative/imagetextalternativeui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport clickOutsideHandler from '@ckeditor/ckeditor5-ui/src/bindings/clickoutsidehandler';\nimport TextAlternativeFormView from './ui/textalternativeformview';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport textAlternativeIcon from '@ckeditor/ckeditor5-core/theme/icons/low-vision.svg';\nimport {\n repositionContextualBalloon,\n getBalloonPositionData\n} from '../image/ui/utils';\nimport { getSelectedImageWidget } from '../image/utils';\n/**\n * The image text alternative UI plugin.\n *\n * The plugin uses the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternativeUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageTextAlternativeUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n this._createButton();\n this._createForm();\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n super.destroy();\n // Destroy created UI components as they are not automatically destroyed (see ckeditor5#1341).\n this._form.destroy();\n }\n /**\n\t * Creates a button showing the balloon panel for changing the image text alternative and\n\t * registers it in the editor {@link module:ui/componentfactory~ComponentFactory ComponentFactory}.\n\t *\n\t * @private\n\t */\n _createButton() {\n const editor = this.editor;\n const t = editor.t;\n editor.ui.componentFactory.add('imageTextAlternative', locale => {\n const command = editor.commands.get('imageTextAlternative');\n const view = new ButtonView(locale);\n view.set({\n label: t('bv'),\n icon: textAlternativeIcon,\n tooltip: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n this.listenTo(view, 'execute', () => this._showForm());\n return view;\n });\n }\n /**\n\t * Creates the {@link module:image/imagetextalternative/ui/textalternativeformview~TextAlternativeFormView}\n\t * form.\n\t *\n\t * @private\n\t */\n _createForm() {\n const editor = this.editor;\n const view = editor.editing.view;\n const viewDocument = view.document;\n /**\n\t\t * The contextual balloon plugin instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:ui/panel/balloon/contextualballoon~ContextualBalloon}\n\t\t */\n this._balloon = this.editor.plugins.get('ContextualBalloon');\n /**\n\t\t * A form containing a textarea and buttons, used to change the `alt` text value.\n\t\t *\n\t\t * @member {module:image/imagetextalternative/ui/textalternativeformview~TextAlternativeFormView}\n\t\t */\n this._form = new TextAlternativeFormView(editor.locale);\n // Render the form so its #element is available for clickOutsideHandler.\n this._form.render();\n this.listenTo(this._form, 'submit', () => {\n editor.execute('imageTextAlternative', { newValue: this._form.labeledInput.inputView.element.value });\n this._hideForm(true);\n });\n this.listenTo(this._form, 'cancel', () => {\n this._hideForm(true);\n });\n // Close the form on Esc key press.\n this._form.keystrokes.set('Esc', (data, cancel) => {\n this._hideForm(true);\n cancel();\n });\n // Reposition the balloon or hide the form if an image widget is no longer selected.\n this.listenTo(editor.ui, 'update', () => {\n if (!getSelectedImageWidget(viewDocument.selection)) {\n this._hideForm(true);\n } else if (this._isVisible) {\n repositionContextualBalloon(editor);\n }\n });\n // Close on click outside of balloon panel element.\n clickOutsideHandler({\n emitter: this._form,\n activator: () => this._isVisible,\n contextElements: [this._balloon.view.element],\n callback: () => this._hideForm()\n });\n }\n /**\n\t * Shows the {@link #_form} in the {@link #_balloon}.\n\t *\n\t * @private\n\t */\n _showForm() {\n if (this._isVisible) {\n return;\n }\n const editor = this.editor;\n const command = editor.commands.get('imageTextAlternative');\n const labeledInput = this._form.labeledInput;\n if (!this._isInBalloon) {\n this._balloon.add({\n view: this._form,\n position: getBalloonPositionData(editor)\n });\n }\n // Make sure that each time the panel shows up, the field remains in sync with the value of\n // the command. If the user typed in the input, then canceled the balloon (`labeledInput#value`\n // stays unaltered) and re-opened it without changing the value of the command, they would see the\n // old value instead of the actual value of the command.\n // https://github.com/ckeditor/ckeditor5-image/issues/114\n labeledInput.value = labeledInput.inputView.element.value = command.value || '';\n this._form.labeledInput.select();\n }\n /**\n\t * Removes the {@link #_form} from the {@link #_balloon}.\n\t *\n\t * @param {Boolean} [focusEditable=false] Controls whether the editing view is focused afterwards.\n\t * @private\n\t */\n _hideForm(focusEditable) {\n if (!this._isInBalloon) {\n return;\n }\n // Blur the input element before removing it from DOM to prevent issues in some browsers.\n // See https://github.com/ckeditor/ckeditor5/issues/1501.\n if (this._form.focusTracker.isFocused) {\n this._form.saveButtonView.focus();\n }\n this._balloon.remove(this._form);\n if (focusEditable) {\n this.editor.editing.view.focus();\n }\n }\n /**\n\t * Returns `true` when the {@link #_form} is the visible view in the {@link #_balloon}.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _isVisible() {\n return this._balloon.visibleView === this._form;\n }\n /**\n\t * Returns `true` when the {@link #_form} is in the {@link #_balloon}.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _isInBalloon() {\n return this._balloon.hasView(this._form);\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M5.085 6.22L2.943 4.078a.75.75 0 1 1 1.06-1.06l2.592 2.59A11.094 11.094 0 0 1 10 5.068c4.738 0 8.578 3.101 8.578 5.083 0 1.197-1.401 2.803-3.555 3.887l1.714 1.713a.75.75 0 0 1-.09 1.138.488.488 0 0 1-.15.084.75.75 0 0 1-.821-.16L6.17 7.304c-.258.11-.51.233-.757.365l6.239 6.24-.006.005.78.78c-.388.094-.78.166-1.174.215l-1.11-1.11h.011L4.55 8.197a7.2 7.2 0 0 0-.665.514l-.112.098 4.897 4.897-.005.006 1.276 1.276a10.164 10.164 0 0 1-1.477-.117l-.479-.479-.009.009-4.863-4.863-.022.031a2.563 2.563 0 0 0-.124.2c-.043.077-.08.158-.108.241a.534.534 0 0 0-.028.133.29.29 0 0 0 .008.072.927.927 0 0 0 .082.226c.067.133.145.26.234.379l3.242 3.365.025.01.59.623c-3.265-.918-5.59-3.155-5.59-4.668 0-1.194 1.448-2.838 3.663-3.93zm7.07.531a4.632 4.632 0 0 1 1.108 5.992l.345.344.046-.018a9.313 9.313 0 0 0 2-1.112c.256-.187.5-.392.727-.613.137-.134.27-.277.392-.431.072-.091.141-.185.203-.286.057-.093.107-.19.148-.292a.72.72 0 0 0 .036-.12.29.29 0 0 0 .008-.072.492.492 0 0 0-.028-.133.999.999 0 0 0-.036-.096 2.165 2.165 0 0 0-.071-.145 2.917 2.917 0 0 0-.125-.2 3.592 3.592 0 0 0-.263-.335 5.444 5.444 0 0 0-.53-.523 7.955 7.955 0 0 0-1.054-.768 9.766 9.766 0 0 0-1.879-.891c-.337-.118-.68-.219-1.027-.301zm-2.85.21l-.069.002a.508.508 0 0 0-.254.097.496.496 0 0 0-.104.679.498.498 0 0 0 .326.199l.045.005c.091.003.181.003.272.012a2.45 2.45 0 0 1 2.017 1.513c.024.061.043.125.069.185a.494.494 0 0 0 .45.287h.008a.496.496 0 0 0 .35-.158.482.482 0 0 0 .13-.335.638.638 0 0 0-.048-.219 3.379 3.379 0 0 0-.36-.723 3.438 3.438 0 0 0-2.791-1.543l-.028-.001h-.013z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageTextAlternativeEditing from './imagetextalternative/imagetextalternativeediting';\nimport ImageTextAlternativeUI from './imagetextalternative/imagetextalternativeui';\n\n/**\n * The image text alternative plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-styles image styles} documentation.\n *\n * This is a \"glue\" plugin which loads the\n * {@link module:image/imagetextalternative/imagetextalternativeediting~ImageTextAlternativeEditing}\n * and {@link module:image/imagetextalternative/imagetextalternativeui~ImageTextAlternativeUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternative extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageTextAlternativeEditing, ImageTextAlternativeUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageTextAlternative';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageEditing from '../src/image/imageediting';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\nimport ImageTextAlternative from './imagetextalternative';\n\nimport '../theme/image.css';\n\n/**\n * The image plugin.\n *\n * For a detailed overview, check the {@glink features/image image feature} documentation.\n *\n * This is a \"glue\" plugin which loads the following plugins:\n *\n * * {@link module:image/image/imageediting~ImageEditing},\n * * {@link module:image/imagetextalternative~ImageTextAlternative}.\n *\n * Usually, it is used in conjuction with other plugins from this package. See the {@glink api/image package page}\n * for more information.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Image extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageEditing, Widget, ImageTextAlternative ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Image';\n\t}\n}\n\n/**\n * The configuration of the image features. Used by the image features in the `@ckeditor/ckeditor5-image` package.\n *\n * Read more in {@link module:image/image~ImageConfig}.\n *\n * @member {module:image/image~ImageConfig} module:core/editor/editorconfig~EditorConfig#image\n */\n\n/**\n * The configuration of the image features. Used by the image features in the `@ckeditor/ckeditor5-image` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\timage: ... // Image feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface ImageConfig\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module upload/ui/filedialogbuttonview\n */\n\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport View from '@ckeditor/ckeditor5-ui/src/view';\n\n/**\n * The file dialog button view.\n *\n * This component provides a button that opens the native file selection dialog.\n * It can be used to implement the UI of a file upload feature.\n *\n *\t\tconst view = new FileDialogButtonView( locale );\n *\n *\t\tview.set( {\n *\t\t\tacceptedType: 'image/*',\n *\t\t\tallowMultipleFiles: true\n *\t\t} );\n *\n *\t\tview.buttonView.set( {\n *\t\t\tlabel: t( 'Insert image' ),\n *\t\t\ticon: imageIcon,\n *\t\t\ttooltip: true\n *\t\t} );\n *\n *\t\tview.on( 'done', ( evt, files ) => {\n *\t\t\tfor ( const file of Array.from( files ) ) {\n *\t\t\t\tconsole.log( 'Selected file', file );\n *\t\t\t}\n *\t\t} );\n *\n * @extends module:ui/view~View\n */\nexport default class FileDialogButtonView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The button view of the component.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n\t\tthis.buttonView = new ButtonView( locale );\n\n\t\t/**\n\t\t * A hidden `<input>` view used to execute file dialog.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/ui/filedialogbuttonview~FileInputView}\n\t\t */\n\t\tthis._fileInputView = new FileInputView( locale );\n\n\t\t/**\n\t\t * Accepted file types. Can be provided in form of file extensions, media type or one of:\n\t\t * * `audio/*`,\n\t\t * * `video/*`,\n\t\t * * `image/*`.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #acceptedType\n\t\t */\n\t\tthis._fileInputView.bind( 'acceptedType' ).to( this );\n\n\t\t/**\n\t\t * Indicates if multiple files can be selected. Defaults to `true`.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #allowMultipleFiles\n\t\t */\n\t\tthis._fileInputView.bind( 'allowMultipleFiles' ).to( this );\n\n\t\t/**\n\t\t * Fired when file dialog is closed with file selected.\n\t\t *\n\t\t *\t\tview.on( 'done', ( evt, files ) => {\n\t\t *\t\t\tfor ( const file of files ) {\n\t\t *\t\t\t\tconsole.log( 'Selected file', file );\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t * @event done\n\t\t * @param {Array.<File>} files Array of selected files.\n\t\t */\n\t\tthis._fileInputView.delegate( 'done' ).to( this );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-file-dialog-button',\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis.buttonView,\n\t\t\t\tthis._fileInputView\n\t\t\t]\n\t\t} );\n\n\t\tthis.buttonView.on( 'execute', () => {\n\t\t\tthis._fileInputView.open();\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the {@link #buttonView}.\n\t */\n\tfocus() {\n\t\tthis.buttonView.focus();\n\t}\n}\n\n/**\n * The hidden file input view class.\n *\n * @private\n * @extends module:ui/view~View\n */\nclass FileInputView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Accepted file types. Can be provided in form of file extensions, media type or one of:\n\t\t * * `audio/*`,\n\t\t * * `video/*`,\n\t\t * * `image/*`.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #acceptedType\n\t\t */\n\t\tthis.set( 'acceptedType' );\n\n\t\t/**\n\t\t * Indicates if multiple files can be selected. Defaults to `false`.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #allowMultipleFiles\n\t\t */\n\t\tthis.set( 'allowMultipleFiles', false );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'input',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-hidden'\n\t\t\t\t],\n\t\t\t\ttype: 'file',\n\t\t\t\ttabindex: '-1',\n\t\t\t\taccept: bind.to( 'acceptedType' ),\n\t\t\t\tmultiple: bind.to( 'allowMultipleFiles' )\n\t\t\t},\n\n\t\t\ton: {\n\t\t\t\t// Removing from code coverage since we cannot programmatically set input element files.\n\t\t\t\tchange: bind.to( /* istanbul ignore next */ () => {\n\t\t\t\t\tif ( this.element && this.element.files && this.element.files.length ) {\n\t\t\t\t\t\tthis.fire( 'done', this.element.files );\n\t\t\t\t\t}\n\n\t\t\t\t\tthis.element.value = '';\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Opens file dialog.\n\t */\n\topen() {\n\t\tthis.element.click();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload/utils\n */\n\n/* global fetch, File */\n\n/**\n * Creates a regular expression used to test for image files.\n *\n *\t\tconst imageType = createImageTypeRegExp( [ 'png', 'jpeg', 'svg+xml', 'vnd.microsoft.icon' ] );\n *\n *\t\tconsole.log( 'is supported image', imageType.test( file.type ) );\n *\n * @param {Array.<String>} types\n * @returns {RegExp}\n */\nexport function createImageTypeRegExp( types ) {\n\t// Sanitize the MIME type name which may include: \"+\", \"-\" or \".\".\n\tconst regExpSafeNames = types.map( type => type.replace( '+', '\\\\+' ) );\n\n\treturn new RegExp( `^image\\\\/(${ regExpSafeNames.join( '|' ) })$` );\n}\n\n/**\n * Creates a promise that fetches the image local source (Base64 or blob) and resolves with a `File` object.\n *\n * @param {module:engine/view/element~Element} image Image whose source to fetch.\n * @returns {Promise.<File>} A promise which resolves when an image source is fetched and converted to a `File` instance.\n * It resolves with a `File` object. If there were any errors during file processing, the promise will be rejected.\n */\nexport function fetchLocalImage( image ) {\n\treturn new Promise( ( resolve, reject ) => {\n\t\tconst imageSrc = image.getAttribute( 'src' );\n\n\t\t// Fetch works asynchronously and so does not block browser UI when processing data.\n\t\tfetch( imageSrc )\n\t\t\t.then( resource => resource.blob() )\n\t\t\t.then( blob => {\n\t\t\t\tconst mimeType = getImageMimeType( blob, imageSrc );\n\t\t\t\tconst ext = mimeType.replace( 'image/', '' );\n\t\t\t\tconst filename = `image.${ ext }`;\n\t\t\t\tconst file = createFileFromBlob( blob, filename, mimeType );\n\n\t\t\t\tfile ? resolve( file ) : reject();\n\t\t\t} )\n\t\t\t.catch( reject );\n\t} );\n}\n\n/**\n * Checks whether a given node is an image element with a local source (Base64 or blob).\n *\n * @param {module:engine/view/node~Node} node The node to check.\n * @returns {Boolean}\n */\nexport function isLocalImage( node ) {\n\tif ( !node.is( 'element', 'img' ) || !node.getAttribute( 'src' ) ) {\n\t\treturn false;\n\t}\n\n\treturn node.getAttribute( 'src' ).match( /^data:image\\/\\w+;base64,/g ) ||\n\t\tnode.getAttribute( 'src' ).match( /^blob:/g );\n}\n\n// Extracts an image type based on its blob representation or its source.\n//\n// @param {String} src Image `src` attribute value.\n// @param {Blob} blob Image blob representation.\n// @returns {String}\nfunction getImageMimeType( blob, src ) {\n\tif ( blob.type ) {\n\t\treturn blob.type;\n\t} else if ( src.match( /data:(image\\/\\w+);base64/ ) ) {\n\t\treturn src.match( /data:(image\\/\\w+);base64/ )[ 1 ].toLowerCase();\n\t} else {\n\t\t// Fallback to 'jpeg' as common extension.\n\t\treturn 'image/jpeg';\n\t}\n}\n\n// Creates a `File` instance from the given `Blob` instance using the specified file name.\n//\n// @param {Blob} blob The `Blob` instance from which the file will be created.\n// @param {String} filename The file name used during the file creation.\n// @param {String} mimeType The file MIME type.\n// @returns {File|null} The `File` instance created from the given blob or `null` if `File API` is not available.\nfunction createFileFromBlob( blob, filename, mimeType ) {\n\ttry {\n\t\treturn new File( [ blob ], filename, { type: mimeType } );\n\t} catch ( err ) {\n\t\t// Edge does not support `File` constructor ATM, see https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/9551546/.\n\t\t// However, the `File` function is present (so cannot be checked with `!window.File` or `typeof File === 'function'`), but\n\t\t// calling it with `new File( ... )` throws an error. This try-catch prevents that. Also when the function will\n\t\t// be implemented correctly in Edge the code will start working without any changes (see #247).\n\t\treturn null;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imageupload/imageuploadui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileDialogButtonView from '@ckeditor/ckeditor5-upload/src/ui/filedialogbuttonview';\nimport imageIcon from '@ckeditor/ckeditor5-core/theme/icons/image.svg';\nimport { createImageTypeRegExp } from './utils';\n/**\n * The image upload button plugin.\n *\n * For a detailed overview, check the {@glink features/image-upload/image-upload Image upload feature} documentation.\n *\n * Adds the `'imageUpload'` button to the {@link module:ui/componentfactory~ComponentFactory UI component factory}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Setup `imageUpload` button.\n editor.ui.componentFactory.add('imageUpload', locale => {\n const view = new FileDialogButtonView(locale);\n const command = editor.commands.get('imageUpload');\n const imageTypes = editor.config.get('image.upload.types');\n const imageTypesRegExp = createImageTypeRegExp(imageTypes);\n view.set({\n acceptedType: imageTypes.map(type => `image/${ type }`).join(','),\n allowMultipleFiles: true\n });\n view.buttonView.set({\n label: t('j'),\n icon: imageIcon,\n tooltip: true\n });\n view.buttonView.bind('isEnabled').to(command);\n view.on('done', (evt, files) => {\n const imagesToUpload = Array.from(files).filter(file => imageTypesRegExp.test(file.type));\n if (imagesToUpload.length) {\n editor.execute('imageUpload', { file: imagesToUpload });\n }\n });\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M6.91 10.54c.26-.23.64-.21.88.03l3.36 3.14 2.23-2.06a.64.64 0 0 1 .87 0l2.52 2.97V4.5H3.2v10.12l3.71-4.08zm10.27-7.51c.6 0 1.09.47 1.09 1.05v11.84c0 .59-.49 1.06-1.09 1.06H2.79c-.6 0-1.09-.47-1.09-1.06V4.08c0-.58.49-1.05 1.1-1.05h14.38zm-5.22 5.56a1.96 1.96 0 1 1 3.4-1.96 1.96 1.96 0 0 1-3.4 1.96z\\\"/></svg>\"","export default \"<svg xmlns=\\\"http://www.w3.org/2000/svg\\\" viewBox=\\\"0 0 700 250\\\"><rect rx=\\\"4\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload/imageuploadprogress\n */\n\n/* globals setTimeout */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport uploadingPlaceholder from '../../theme/icons/image_placeholder.svg';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport '../../theme/imageuploadprogress.css';\nimport '../../theme/imageuploadicon.css';\nimport '../../theme/imageuploadloader.css';\n\n/**\n * The image upload progress plugin.\n * It shows a placeholder when the image is read from the disk and a progress bar while the image is uploading.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadProgress extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The image placeholder that is displayed before real image data can be accessed.\n\t\t *\n\t\t * @protected\n\t\t * @member {String} #placeholder\n\t\t */\n\t\tthis.placeholder = 'data:image/svg+xml;utf8,' + encodeURIComponent( uploadingPlaceholder );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Upload status change - update image's view according to that status.\n\t\teditor.editing.downcastDispatcher.on( 'attribute:uploadStatus:image', ( ...args ) => this.uploadStatusChange( ...args ) );\n\t}\n\n\t/**\n\t * This method is called each time the image `uploadStatus` attribute is changed.\n\t *\n\t * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n\t */\n\tuploadStatusChange( evt, data, conversionApi ) {\n\t\tconst editor = this.editor;\n\t\tconst modelImage = data.item;\n\t\tconst uploadId = modelImage.getAttribute( 'uploadId' );\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst fileRepository = editor.plugins.get( FileRepository );\n\t\tconst status = uploadId ? data.attributeNewValue : null;\n\t\tconst placeholder = this.placeholder;\n\t\tconst viewFigure = editor.editing.mapper.toViewElement( modelImage );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\tif ( status == 'reading' ) {\n\t\t\t// Start \"appearing\" effect and show placeholder with infinite progress bar on the top\n\t\t\t// while image is read from disk.\n\t\t\t_startAppearEffect( viewFigure, viewWriter );\n\t\t\t_showPlaceholder( placeholder, viewFigure, viewWriter );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Show progress bar on the top of the image when image is uploading.\n\t\tif ( status == 'uploading' ) {\n\t\t\tconst loader = fileRepository.loaders.get( uploadId );\n\n\t\t\t// Start appear effect if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.\n\t\t\t_startAppearEffect( viewFigure, viewWriter );\n\n\t\t\tif ( !loader ) {\n\t\t\t\t// There is no loader associated with uploadId - this means that image came from external changes.\n\t\t\t\t// In such cases we still want to show the placeholder until image is fully uploaded.\n\t\t\t\t// Show placeholder if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.\n\t\t\t\t_showPlaceholder( placeholder, viewFigure, viewWriter );\n\t\t\t} else {\n\t\t\t\t// Hide placeholder and initialize progress bar showing upload progress.\n\t\t\t\t_hidePlaceholder( viewFigure, viewWriter );\n\t\t\t\t_showProgressBar( viewFigure, viewWriter, loader, editor.editing.view );\n\t\t\t\t_displayLocalImage( viewFigure, viewWriter, loader );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Because in Edge there is no way to show fancy animation of completeIcon we need to skip it.\n\t\tif ( status == 'complete' && fileRepository.loaders.get( uploadId ) && !env.isEdge ) {\n\t\t\t_showCompleteIcon( viewFigure, viewWriter, editor.editing.view );\n\t\t}\n\n\t\t// Clean up.\n\t\t_hideProgressBar( viewFigure, viewWriter );\n\t\t_hidePlaceholder( viewFigure, viewWriter );\n\t\t_stopAppearEffect( viewFigure, viewWriter );\n\t}\n}\n\n// Adds ck-appear class to the image figure if one is not already applied.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _startAppearEffect( viewFigure, writer ) {\n\tif ( !viewFigure.hasClass( 'ck-appear' ) ) {\n\t\twriter.addClass( 'ck-appear', viewFigure );\n\t}\n}\n\n// Removes ck-appear class to the image figure if one is not already removed.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _stopAppearEffect( viewFigure, writer ) {\n\twriter.removeClass( 'ck-appear', viewFigure );\n}\n\n// Shows placeholder together with infinite progress bar on given image figure.\n//\n// @param {String} Data-uri with a svg placeholder.\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _showPlaceholder( placeholder, viewFigure, writer ) {\n\tif ( !viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {\n\t\twriter.addClass( 'ck-image-upload-placeholder', viewFigure );\n\t}\n\n\tconst viewImg = viewFigure.getChild( 0 );\n\n\tif ( viewImg.getAttribute( 'src' ) !== placeholder ) {\n\t\twriter.setAttribute( 'src', placeholder, viewImg );\n\t}\n\n\tif ( !_getUIElement( viewFigure, 'placeholder' ) ) {\n\t\twriter.insert( writer.createPositionAfter( viewImg ), _createPlaceholder( writer ) );\n\t}\n}\n\n// Removes placeholder together with infinite progress bar on given image figure.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _hidePlaceholder( viewFigure, writer ) {\n\tif ( viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {\n\t\twriter.removeClass( 'ck-image-upload-placeholder', viewFigure );\n\t}\n\n\t_removeUIElement( viewFigure, writer, 'placeholder' );\n}\n\n// Shows progress bar displaying upload progress.\n// Attaches it to the file loader to update when upload percentace is changed.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:upload/filerepository~FileLoader} loader\n// @param {module:engine/view/view~View} view\nfunction _showProgressBar( viewFigure, writer, loader, view ) {\n\tconst progressBar = _createProgressBar( writer );\n\twriter.insert( writer.createPositionAt( viewFigure, 'end' ), progressBar );\n\n\t// Update progress bar width when uploadedPercent is changed.\n\tloader.on( 'change:uploadedPercent', ( evt, name, value ) => {\n\t\tview.change( writer => {\n\t\t\twriter.setStyle( 'width', value + '%', progressBar );\n\t\t} );\n\t} );\n}\n\n// Hides upload progress bar.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _hideProgressBar( viewFigure, writer ) {\n\t_removeUIElement( viewFigure, writer, 'progressBar' );\n}\n\n// Shows complete icon and hides after a certain amount of time.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:engine/view/view~View} view\nfunction _showCompleteIcon( viewFigure, writer, view ) {\n\tconst completeIcon = writer.createUIElement( 'div', { class: 'ck-image-upload-complete-icon' } );\n\n\twriter.insert( writer.createPositionAt( viewFigure, 'end' ), completeIcon );\n\n\tsetTimeout( () => {\n\t\tview.change( writer => writer.remove( writer.createRangeOn( completeIcon ) ) );\n\t}, 3000 );\n}\n\n// Create progress bar element using {@link module:engine/view/uielement~UIElement}.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/uielement~UIElement}\nfunction _createProgressBar( writer ) {\n\tconst progressBar = writer.createUIElement( 'div', { class: 'ck-progress-bar' } );\n\n\twriter.setCustomProperty( 'progressBar', true, progressBar );\n\n\treturn progressBar;\n}\n\n// Create placeholder element using {@link module:engine/view/uielement~UIElement}.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/uielement~UIElement}\nfunction _createPlaceholder( writer ) {\n\tconst placeholder = writer.createUIElement( 'div', { class: 'ck-upload-placeholder-loader' } );\n\n\twriter.setCustomProperty( 'placeholder', true, placeholder );\n\n\treturn placeholder;\n}\n\n// Returns {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.\n// Returns `undefined` if element is not found.\n//\n// @private\n// @param {module:engine/view/element~Element} imageFigure\n// @param {String} uniqueProperty\n// @returns {module:engine/view/uielement~UIElement|undefined}\nfunction _getUIElement( imageFigure, uniqueProperty ) {\n\tfor ( const child of imageFigure.getChildren() ) {\n\t\tif ( child.getCustomProperty( uniqueProperty ) ) {\n\t\t\treturn child;\n\t\t}\n\t}\n}\n\n// Removes {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.\n//\n// @private\n// @param {module:engine/view/element~Element} imageFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {String} uniqueProperty\nfunction _removeUIElement( viewFigure, writer, uniqueProperty ) {\n\tconst element = _getUIElement( viewFigure, uniqueProperty );\n\n\tif ( element ) {\n\t\twriter.remove( writer.createRangeOn( element ) );\n\t}\n}\n\n// Displays local data from file loader.\n//\n// @param {module:engine/view/element~Element} imageFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:upload/filerepository~FileLoader} loader\nfunction _displayLocalImage( viewFigure, writer, loader ) {\n\tif ( loader.data ) {\n\t\tconst viewImg = viewFigure.getChild( 0 );\n\n\t\twriter.setAttribute( 'src', loader.data, viewImg );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/view/upcastwriter\n */\n\nimport DocumentFragment from './documentfragment';\nimport Element from './element';\nimport Text from './text';\nimport { isPlainObject } from 'lodash-es';\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\n\n/**\n * View upcast writer. It provides a set of methods used to manipulate non-semantic view trees.\n *\n * It should be used only while working on a non-semantic view\n * (e.g. a view created from HTML string on paste).\n * To manipulate a view which was or is being downcasted from the the model use the\n * {@link module:engine/view/downcastwriter~DowncastWriter downcast writer}.\n *\n * Read more about changing the view in the {@glink framework/guides/architecture/editing-engine#changing-the-view Changing the view}\n * section of the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide.\n *\n * Unlike `DowncastWriter`, which is available in the {@link module:engine/view/view~View#change `View#change()`} block,\n * `UpcastWriter` can be created wherever you need it:\n *\n *\t\tconst writer = new UpcastWriter();\n *\t\tconst text = writer.createText( 'foo!' );\n *\n *\t\twriter.appendChild( text, someViewElement );\n */\nexport default class UpcastWriter {\n\t/**\n\t * Creates a new {@link module:engine/view/documentfragment~DocumentFragment} instance.\n\t *\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into the created document fragment.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} The created document fragment.\n\t */\n\tcreateDocumentFragment( children ) {\n\t\treturn new DocumentFragment( children );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/element~Element} instance.\n\t *\n\t * Attributes can be passed in various formats:\n\t *\n\t *\t\tupcastWriter.createElement( 'div', { class: 'editor', contentEditable: 'true' } ); // object\n\t *\t\tupcastWriter.createElement( 'div', [ [ 'class', 'editor' ], [ 'contentEditable', 'true' ] ] ); // map-like iterator\n\t *\t\tupcastWriter.createElement( 'div', mapOfAttributes ); // map\n\t *\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attrs] Collection of attributes.\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into created element.\n\t * @returns {module:engine/view/element~Element} Created element.\n\t */\n\tcreateElement( name, attrs, children ) {\n\t\treturn new Element( name, attrs, children );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/text~Text} instance.\n\t *\n\t * @param {String} data The text's data.\n\t * @returns {module:engine/view/text~Text} The created text node.\n\t */\n\tcreateText( data ) {\n\t\treturn new Text( data );\n\t}\n\n\t/**\n\t * Clones the provided element.\n\t *\n\t * @see module:engine/view/element~Element#_clone\n\t * @param {module:engine/view/element~Element} element Element to be cloned.\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/element~Element} Clone of this element.\n\t */\n\tclone( element, deep = false ) {\n\t\treturn element._clone( deep );\n\t}\n\n\t/**\n\t * Appends a child node or a list of child nodes at the end of this node\n\t * and sets the parent of these nodes to this element.\n\t *\n\t * @see module:engine/view/element~Element#_appendChild\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * to which items will be appended.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Number} Number of appended nodes.\n\t */\n\tappendChild( items, element ) {\n\t\treturn element._appendChild( items );\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this element.\n\t *\n\t * @see module:engine/view/element~Element#_insertChild\n\t * @param {Number} index Offset at which nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * to which items will be inserted.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\tinsertChild( index, items, element ) {\n\t\treturn element._insertChild( index, items );\n\t}\n\n\t/**\n\t * Removes the given number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @see module:engine/view/element~Element#_removeChildren\n\t * @param {Number} index Offset from which nodes will be removed.\n\t * @param {Number} howMany Number of nodes to remove.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * which children will be removed.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Array.<module:engine/view/node~Node>} The array containing removed nodes.\n\t */\n\tremoveChildren( index, howMany, element ) {\n\t\treturn element._removeChildren( index, howMany );\n\t}\n\n\t/**\n\t * Removes given element from the view structure. Will not have effect on detached elements.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which will be removed.\n\t * @returns {Array.<module:engine/view/node~Node>} The array containing removed nodes.\n\t */\n\tremove( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( parent ) {\n\t\t\treturn this.removeChildren( parent.getChildIndex( element ), 1, parent );\n\t\t}\n\n\t\treturn [];\n\t}\n\n\t/**\n\t * Replaces given element with the new one in the view structure. Will not have effect on detached elements.\n\t *\n\t * @param {module:engine/view/element~Element} oldElement Element which will be replaced.\n\t * @param {module:engine/view/element~Element} newElement Element which will be inserted in the place of the old element.\n\t * @returns {Boolean} Whether old element was successfully replaced.\n\t */\n\treplace( oldElement, newElement ) {\n\t\tconst parent = oldElement.parent;\n\n\t\tif ( parent ) {\n\t\t\tconst index = parent.getChildIndex( oldElement );\n\n\t\t\tthis.removeChildren( index, 1, parent );\n\t\t\tthis.insertChild( index, newElement, parent );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes given element from view structure and places its children in its position.\n\t * It does nothing if element has no parent.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to unwrap.\n\t */\n\tunwrapElement( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( parent ) {\n\t\t\tconst index = parent.getChildIndex( element );\n\n\t\t\tthis.remove( element );\n\t\t\tthis.insertChild( index, element.getChildren(), parent );\n\t\t}\n\t}\n\n\t/**\n\t * Renames element by creating a copy of a given element but with its name changed and then moving contents of the\n\t * old element to the new one.\n\t *\n\t * Since this function creates a new element and removes the given one, the new element is returned to keep reference.\n\t *\n\t * @param {String} newName New element name.\n\t * @param {module:engine/view/element~Element} element Element to be renamed.\n\t * @returns {module:engine/view/element~Element|null} New element or null if the old element\n\t * was not replaced (happens for detached elements).\n\t */\n\trename( newName, element ) {\n\t\tconst newElement = new Element( newName, element.getAttributes(), element.getChildren() );\n\n\t\treturn this.replace( element, newElement ) ? newElement : null;\n\t}\n\n\t/**\n\t * Adds or overwrites element's attribute with a specified key and value.\n\t *\n\t *\t\twriter.setAttribute( linkElement, 'href', 'http://ckeditor.com' );\n\t *\n\t * @see module:engine/view/element~Element#_setAttribute\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @param {module:engine/view/element~Element} element Element for which attribute will be set.\n\t */\n\tsetAttribute( key, value, element ) {\n\t\telement._setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t *\t\twriter.removeAttribute( linkElement, 'href' );\n\t *\n\t * @see module:engine/view/element~Element#_removeAttribute\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/view/element~Element} element Element from which attribute will be removed.\n\t */\n\tremoveAttribute( key, element ) {\n\t\telement._removeAttribute( key );\n\t}\n\n\t/**\n\t * Adds specified class to the element.\n\t *\n\t *\t\twriter.addClass( linkElement, 'foo' );\n\t *\t\twriter.addClass( linkElement, [ 'foo', 'bar' ] );\n\t *\n\t * @see module:engine/view/element~Element#_addClass\n\t * @param {Array.<String>|String} className Single class name or array of class names which will be added.\n\t * @param {module:engine/view/element~Element} element Element for which class will be added.\n\t */\n\taddClass( className, element ) {\n\t\telement._addClass( className );\n\t}\n\n\t/**\n\t * Removes specified class from the element.\n\t *\n\t *\t\twriter.removeClass( linkElement, 'foo' );\n\t *\t\twriter.removeClass( linkElement, [ 'foo', 'bar' ] );\n\t *\n\t * @see module:engine/view/element~Element#_removeClass\n\t * @param {Array.<String>|String} className Single class name or array of class names which will be removed.\n\t * @param {module:engine/view/element~Element} element Element from which class will be removed.\n\t */\n\tremoveClass( className, element ) {\n\t\telement._removeClass( className );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\twriter.setStyle( element, 'color', 'red' );\n\t *\t\twriter.setStyle( element, {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t} );\n\t *\n\t * @see module:engine/view/element~Element#_setStyle\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @param {module:engine/view/element~Element} element Element for which style will be added.\n\t */\n\tsetStyle( property, value, element ) {\n\t\tif ( isPlainObject( property ) && element === undefined ) {\n\t\t\telement = value;\n\t\t}\n\t\telement._setStyle( property, value );\n\t}\n\n\t/**\n\t * Removes specified style from the element.\n\t *\n\t *\t\twriter.removeStyle( element, 'color' ); // Removes 'color' style.\n\t *\t\twriter.removeStyle( element, [ 'color', 'border-top' ] ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @see module:engine/view/element~Element#_removeStyle\n\t * @param {Array.<String>|String} property Style property name or names to be removed.\n\t * @param {module:engine/view/element~Element} element Element from which style will be removed.\n\t */\n\tremoveStyle( property, element ) {\n\t\telement._removeStyle( property );\n\t}\n\n\t/**\n\t * Sets a custom property on element. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @see module:engine/view/element~Element#_setCustomProperty\n\t * @param {String|Symbol} key Custom property name/key.\n\t * @param {*} value Custom property value to be stored.\n\t * @param {module:engine/view/element~Element} element Element for which custom property will be set.\n\t */\n\tsetCustomProperty( key, value, element ) {\n\t\telement._setCustomProperty( key, value );\n\t}\n\n\t/**\n\t * Removes a custom property stored under the given key.\n\t *\n\t * @see module:engine/view/element~Element#_removeCustomProperty\n\t * @param {String|Symbol} key Name/key of the custom property to be removed.\n\t * @param {module:engine/view/element~Element} element Element from which the custom property will be removed.\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\tremoveCustomProperty( key, element ) {\n\t\treturn element._removeCustomProperty( key );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { insertImage, isImageAllowed } from '../image/utils';\n\n/**\n * @module image/imageupload/imageuploadcommand\n */\n\n/**\n * The image upload command.\n *\n * The command is registered by the {@link module:image/imageupload/imageuploadediting~ImageUploadEditing} plugin as `'imageUpload'`.\n *\n * In order to upload an image at the current selection position\n * (according to the {@link module:widget/utils~findOptimalInsertionPosition} algorithm),\n * execute the command and pass the native image file instance:\n *\n *\t\tthis.listenTo( editor.editing.view.document, 'clipboardInput', ( evt, data ) => {\n *\t\t\t// Assuming that only images were pasted:\n *\t\t\tconst images = Array.from( data.dataTransfer.files );\n *\n *\t\t\t// Upload the first image:\n *\t\t\teditor.execute( 'imageUpload', { file: images[ 0 ] } );\n *\t\t} );\n *\n * It is also possible to insert multiple images at once:\n *\n *\t\teditor.execute( 'imageUpload', {\n *\t\t\tfile: [\n *\t\t\t\tfile1,\n *\t\t\t\tfile2\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:core/command~Command\n */\nexport default class ImageUploadCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = isImageAllowed( this.editor.model );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options Options for the executed command.\n\t * @param {File|Array.<File>} options.file The image file or an array of image files to upload.\n\t */\n\texecute( options ) {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\n\t\tconst fileRepository = editor.plugins.get( FileRepository );\n\n\t\tmodel.change( writer => {\n\t\t\tconst filesToUpload = Array.isArray( options.file ) ? options.file : [ options.file ];\n\n\t\t\tfor ( const file of filesToUpload ) {\n\t\t\t\tuploadImage( writer, model, fileRepository, file );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Handles uploading single file.\n//\n// @param {module:engine/model/writer~writer} writer\n// @param {module:engine/model/model~Model} model\n// @param {File} file\nfunction uploadImage( writer, model, fileRepository, file ) {\n\tconst loader = fileRepository.createLoader( file );\n\n\t// Do not throw when upload adapter is not set. FileRepository will log an error anyway.\n\tif ( !loader ) {\n\t\treturn;\n\t}\n\n\tinsertImage( writer, model, { uploadId: loader.id } );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imageupload/imageuploadediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport Notification from '@ckeditor/ckeditor5-ui/src/notification/notification';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\nimport ImageUploadCommand from '../../src/imageupload/imageuploadcommand';\nimport {\n fetchLocalImage,\n isLocalImage\n} from '../../src/imageupload/utils';\nimport { createImageTypeRegExp } from './utils';\n/**\n * The editing part of the image upload feature. It registers the `'imageUpload'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [\n FileRepository,\n Notification,\n Clipboard\n ];\n }\n static get pluginName() {\n return 'ImageUploadEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n editor.config.define('image', {\n upload: {\n types: [\n 'jpeg',\n 'png',\n 'gif',\n 'bmp',\n 'webp',\n 'tiff'\n ]\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const doc = editor.model.document;\n const schema = editor.model.schema;\n const conversion = editor.conversion;\n const fileRepository = editor.plugins.get(FileRepository);\n const imageTypes = createImageTypeRegExp(editor.config.get('image.upload.types'));\n // Setup schema to allow uploadId and uploadStatus for images.\n schema.extend('image', {\n allowAttributes: [\n 'uploadId',\n 'uploadStatus'\n ]\n });\n // Register imageUpload command.\n editor.commands.add('imageUpload', new ImageUploadCommand(editor));\n // Register upcast converter for uploadId.\n conversion.for('upcast').attributeToAttribute({\n view: {\n name: 'img',\n key: 'uploadId'\n },\n model: 'uploadId'\n });\n // Handle pasted images.\n // For every image file, a new file loader is created and a placeholder image is\n // inserted into the content. Then, those images are uploaded once they appear in the model\n // (see Document#change listener below).\n this.listenTo(editor.editing.view.document, 'clipboardInput', (evt, data) => {\n // Skip if non empty HTML data is included.\n // https://github.com/ckeditor/ckeditor5-upload/issues/68\n if (isHtmlIncluded(data.dataTransfer)) {\n return;\n }\n const images = Array.from(data.dataTransfer.files).filter(file => {\n // See https://github.com/ckeditor/ckeditor5-image/pull/254.\n if (!file) {\n return false;\n }\n return imageTypes.test(file.type);\n });\n const ranges = data.targetRanges.map(viewRange => editor.editing.mapper.toModelRange(viewRange));\n editor.model.change(writer => {\n // Set selection to paste target.\n writer.setSelection(ranges);\n if (images.length) {\n evt.stop();\n // Upload images after the selection has changed in order to ensure the command's state is refreshed.\n editor.model.enqueueChange('default', () => {\n editor.execute('imageUpload', { file: images });\n });\n }\n });\n });\n // Handle HTML pasted with images with base64 or blob sources.\n // For every image file, a new file loader is created and a placeholder image is\n // inserted into the content. Then, those images are uploaded once they appear in the model\n // (see Document#change listener below).\n this.listenTo(editor.plugins.get(Clipboard), 'inputTransformation', (evt, data) => {\n const fetchableImages = Array.from(editor.editing.view.createRangeIn(data.content)).filter(value => isLocalImage(value.item) && !value.item.getAttribute('uploadProcessed')).map(value => {\n return {\n promise: fetchLocalImage(value.item),\n imageElement: value.item\n };\n });\n if (!fetchableImages.length) {\n return;\n }\n const writer = new UpcastWriter();\n for (const fetchableImage of fetchableImages) {\n // Set attribute marking that the image was processed already.\n writer.setAttribute('uploadProcessed', true, fetchableImage.imageElement);\n const loader = fileRepository.createLoader(fetchableImage.promise);\n if (loader) {\n writer.setAttribute('src', '', fetchableImage.imageElement);\n writer.setAttribute('uploadId', loader.id, fetchableImage.imageElement);\n }\n }\n });\n // Prevents from the browser redirecting to the dropped image.\n editor.editing.view.document.on('dragover', (evt, data) => {\n data.preventDefault();\n });\n // Upload placeholder images that appeared in the model.\n doc.on('change', () => {\n const changes = doc.differ.getChanges({ includeChangesInGraveyard: true });\n for (const entry of changes) {\n if (entry.type == 'insert' && entry.name != '$text') {\n const item = entry.position.nodeAfter;\n const isInGraveyard = entry.position.root.rootName == '$graveyard';\n for (const image of getImagesFromChangeItem(editor, item)) {\n // Check if the image element still has upload id.\n const uploadId = image.getAttribute('uploadId');\n if (!uploadId) {\n continue;\n }\n // Check if the image is loaded on this client.\n const loader = fileRepository.loaders.get(uploadId);\n if (!loader) {\n continue;\n }\n if (isInGraveyard) {\n // If the image was inserted to the graveyard - abort the loading process.\n loader.abort();\n } else if (loader.status == 'idle') {\n // If the image was inserted into content and has not been loaded yet, start loading it.\n this._readAndUpload(loader, image);\n }\n }\n }\n }\n });\n }\n /**\n\t * Reads and uploads an image.\n\t *\n\t * The image is read from the disk and as a Base64-encoded string it is set temporarily to\n\t * `image[src]`. When the image is successfully uploaded, the temporary data is replaced with the target\n\t * image's URL (the URL to the uploaded image on the server).\n\t *\n\t * @protected\n\t * @param {module:upload/filerepository~FileLoader} loader\n\t * @param {module:engine/model/element~Element} imageElement\n\t * @returns {Promise}\n\t */\n _readAndUpload(loader, imageElement) {\n const editor = this.editor;\n const model = editor.model;\n const t = editor.locale.t;\n const fileRepository = editor.plugins.get(FileRepository);\n const notification = editor.plugins.get(Notification);\n model.enqueueChange('transparent', writer => {\n writer.setAttribute('uploadStatus', 'reading', imageElement);\n });\n return loader.read().then(() => {\n const promise = loader.upload();\n // Force re–paint in Safari. Without it, the image will display with a wrong size.\n // https://github.com/ckeditor/ckeditor5/issues/1975\n /* istanbul ignore next */\n if (env.isSafari) {\n const viewFigure = editor.editing.mapper.toViewElement(imageElement);\n const viewImg = viewFigure.getChild(0);\n editor.editing.view.once('render', () => {\n // Early returns just to be safe. There might be some code ran\n // in between the outer scope and this callback.\n if (!viewImg.parent) {\n return;\n }\n const domFigure = editor.editing.view.domConverter.mapViewToDom(viewImg.parent);\n if (!domFigure) {\n return;\n }\n const originalDisplay = domFigure.style.display;\n domFigure.style.display = 'none';\n // Make sure this line will never be removed during minification for having \"no effect\".\n domFigure._ckHack = domFigure.offsetHeight;\n domFigure.style.display = originalDisplay;\n });\n }\n model.enqueueChange('transparent', writer => {\n writer.setAttribute('uploadStatus', 'uploading', imageElement);\n });\n return promise;\n }).then(data => {\n model.enqueueChange('transparent', writer => {\n writer.setAttributes({\n uploadStatus: 'complete',\n src: data.default\n }, imageElement);\n this._parseAndSetSrcsetAttributeOnImage(data, imageElement, writer);\n });\n clean();\n }).catch(error => {\n // If status is not 'error' nor 'aborted' - throw error because it means that something else went wrong,\n // it might be generic error and it would be real pain to find what is going on.\n if (loader.status !== 'error' && loader.status !== 'aborted') {\n throw error;\n }\n // Might be 'aborted'.\n if (loader.status == 'error' && error) {\n notification.showWarning(error, {\n title: t('an'),\n namespace: 'upload'\n });\n }\n clean();\n // Permanently remove image from insertion batch.\n model.enqueueChange('transparent', writer => {\n writer.remove(imageElement);\n });\n });\n function clean() {\n model.enqueueChange('transparent', writer => {\n writer.removeAttribute('uploadId', imageElement);\n writer.removeAttribute('uploadStatus', imageElement);\n });\n fileRepository.destroyLoader(loader);\n }\n }\n /**\n\t * Creates the `srcset` attribute based on a given file upload response and sets it as an attribute to a specific image element.\n\t *\n\t * @protected\n\t * @param {Object} data Data object from which `srcset` will be created.\n\t * @param {module:engine/model/element~Element} image The image element on which the `srcset` attribute will be set.\n\t * @param {module:engine/model/writer~Writer} writer\n\t */\n _parseAndSetSrcsetAttributeOnImage(data, image, writer) {\n // Srcset attribute for responsive images support.\n let maxWidth = 0;\n const srcsetAttribute = Object.keys(data) // Filter out keys that are not integers.\n.filter(key => {\n const width = parseInt(key, 10);\n if (!isNaN(width)) {\n maxWidth = Math.max(maxWidth, width);\n return true;\n }\n }) // Convert each key to srcset entry.\n.map(key => `${ data[key] } ${ key }w`) // Join all entries.\n.join(', ');\n if (srcsetAttribute != '') {\n writer.setAttribute('srcset', {\n data: srcsetAttribute,\n width: maxWidth\n }, image);\n }\n }\n}\n// Returns `true` if non-empty `text/html` is included in the data transfer.\n//\n// @param {module:clipboard/datatransfer~DataTransfer} dataTransfer\n// @returns {Boolean}\nexport function isHtmlIncluded(dataTransfer) {\n return Array.from(dataTransfer.types).includes('text/html') && dataTransfer.getData('text/html') !== '';\n}\nfunction getImagesFromChangeItem(editor, item) {\n return Array.from(editor.model.createRangeOn(item)).filter(value => value.item.is('image')).map(value => value.item);\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageUploadUI from './imageupload/imageuploadui';\nimport ImageUploadProgress from './imageupload/imageuploadprogress';\nimport ImageUploadEditing from './imageupload/imageuploadediting';\n\n/**\n * The image upload plugin.\n *\n * For a detailed overview, check the {@glink features/image-upload/image-upload image upload feature} documentation.\n *\n * This plugin does not do anything directly, but it loads a set of specific plugins to enable image uploading:\n *\n * * {@link module:image/imageupload/imageuploadediting~ImageUploadEditing},\n * * {@link module:image/imageupload/imageuploadui~ImageUploadUI},\n * * {@link module:image/imageupload/imageuploadprogress~ImageUploadProgress}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUpload extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageUpload';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageUploadEditing, ImageUploadUI, ImageUploadProgress ];\n\t}\n}\n\n/**\n * Image upload configuration.\n *\n * @member {module:image/imageupload~ImageUploadConfig} module:image/image~ImageConfig#upload\n */\n\n/**\n * The configuration of the image upload feature. Used by the image upload feature in the `@ckeditor/ckeditor5-image` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\timage: {\n * \t\t\t\t\tupload: ... // Image upload feature options.\n * \t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface module:image/imageupload~ImageUploadConfig\n */\n\n/**\n * The list of accepted image types.\n *\n * The accepted types of images can be customized to allow only certain types of images:\n *\n *\t\t// Allow only JPEG and PNG images:\n *\t\tconst imageUploadConfig = {\n *\t\t\ttypes: [ 'png', 'jpeg' ]\n *\t\t};\n *\n * The type string should match [one of the sub-types](https://www.iana.org/assignments/media-types/media-types.xhtml#image)\n * of the image MIME type. E.g. for the `image/jpeg` MIME type, add `'jpeg'` to your image upload configuration.\n *\n * **Note:** This setting only restricts some image types to be selected and uploaded through the CKEditor UI and commands. Image type\n * recognition and filtering should also be implemented on the server which accepts image uploads.\n *\n * @member {Array.<String>} module:image/imageupload~ImageUploadConfig#types\n * @default [ 'jpeg', 'png', 'gif', 'bmp', 'webp', 'tiff' ]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paragraph/paragraphcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The paragraph command.\n *\n * @extends module:core/command~Command\n */\nexport default class ParagraphCommand extends Command {\n\t/**\n\t * The value of the command. Indicates whether the selection start is placed in a paragraph.\n\t *\n\t * @readonly\n\t * @observable\n\t * @member {Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst block = first( document.selection.getSelectedBlocks() );\n\n\t\tthis.value = !!block && block.is( 'paragraph' );\n\t\tthis.isEnabled = !!block && checkCanBecomeParagraph( block, model.schema );\n\t}\n\n\t/**\n\t * Executes the command. All the blocks (see {@link module:engine/model/schema~Schema}) in the selection\n\t * will be turned to paragraphs.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Options for the executed command.\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} [options.selection]\n\t * The selection that the command should be applied to.\n\t * By default, if not provided, the command is applied to the {@link module:engine/model/document~Document#selection}.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tconst blocks = ( options.selection || document.selection ).getSelectedBlocks();\n\n\t\t\tfor ( const block of blocks ) {\n\t\t\t\tif ( !block.is( 'paragraph' ) && checkCanBecomeParagraph( block, model.schema ) ) {\n\t\t\t\t\twriter.rename( block, 'paragraph' );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Checks whether the given block can be replaced by a paragraph.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeParagraph( block, schema ) {\n\treturn schema.checkChild( block.parent, 'paragraph' ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paragraph/paragraph\n */\n\nimport ParagraphCommand from './paragraphcommand';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The paragraph feature for the editor.\n *\n * It introduces the `<paragraph>` element in the model which renders as a `<p>` element in the DOM and data.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Paragraph extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Paragraph';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\t\tconst data = editor.data;\n\n\t\teditor.commands.add( 'paragraph', new ParagraphCommand( editor ) );\n\n\t\t// Schema.\n\t\tmodel.schema.register( 'paragraph', { inheritAllFrom: '$block' } );\n\n\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'p' } );\n\n\t\t// Content autoparagraphing. --------------------------------------------------\n\n\t\t// Handles element which has not been converted by any plugin and checks if it would be converted if\n\t\t// we wrap it in a paragraph or change it to a paragraph.\n\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t\t\tmodel: ( viewElement, modelWriter ) => {\n\t\t\t\tif ( !Paragraph.paragraphLikeElements.has( viewElement.name ) ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\t// Do not auto-paragraph empty elements.\n\t\t\t\tif ( viewElement.isEmpty ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\treturn modelWriter.createElement( 'paragraph' );\n\t\t\t},\n\t\t\tconverterPriority: 'low'\n\t\t} );\n\n\t\tdata.upcastDispatcher.on( 'element', ( evt, data, conversionApi ) => {\n\t\t\t// Do not try auto-paragraphing if the element was already converted.\n\t\t\tif ( !conversionApi.consumable.test( data.viewItem, { name: data.viewItem.name } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If the element is not paragraph-like try wrapping it in a paragraph.\n\t\t\tif ( isParagraphable( data.viewItem, data.modelCursor, conversionApi.schema ) ) {\n\t\t\t\tObject.assign( data, wrapInParagraph( data.viewItem, data.modelCursor, conversionApi ) );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// Handles not converted text nodes and checks if would be converted if we wraps then by a paragraph.\n\t\tdata.upcastDispatcher.on( 'text', ( evt, data, conversionApi ) => {\n\t\t\t// When node is already converted then do nothing.\n\t\t\tif ( data.modelRange ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( isParagraphable( data.viewItem, data.modelCursor, conversionApi.schema ) ) {\n\t\t\t\tObject.assign( data, wrapInParagraph( data.viewItem, data.modelCursor, conversionApi ) );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Empty roots autoparagraphing. -----------------------------------------------\n\n\t\t// Post-fixer which takes care of adding empty paragraph elements to empty roots.\n\t\t// Besides fixing content on #changesDone we also need to handle editor.data#ready event because\n\t\t// if initial data is empty or setData() wasn't even called there will be no #change fired.\n\t\tmodel.document.registerPostFixer( writer => this._autoparagraphEmptyRoots( writer ) );\n\n\t\teditor.data.on( 'ready', () => {\n\t\t\tmodel.enqueueChange( 'transparent', writer => this._autoparagraphEmptyRoots( writer ) );\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Fixes all empty roots.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if any change has been applied, `false` otherwise.\n\t */\n\t_autoparagraphEmptyRoots( writer ) {\n\t\tconst model = this.editor.model;\n\n\t\tfor ( const rootName of model.document.getRootNames() ) {\n\t\t\tconst root = model.document.getRoot( rootName );\n\n\t\t\tif ( root.isEmpty && root.rootName != '$graveyard' ) {\n\t\t\t\t// If paragraph element is allowed in the root, create paragraph element.\n\t\t\t\tif ( model.schema.checkChild( root, 'paragraph' ) ) {\n\t\t\t\t\twriter.insertElement( 'paragraph', root );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * A list of element names which should be treated by the autoparagraphing algorithms as\n * paragraph-like. This means that e.g. the following content:\n *\n *\t\t<h1>Foo</h1>\n *\t\t<table>\n *\t\t\t<tr>\n *\t\t\t\t<td>X</td>\n *\t\t\t\t<td>\n *\t\t\t\t\t<ul>\n *\t\t\t\t\t\t<li>Y</li>\n *\t\t\t\t\t\t<li>Z</li>\n *\t\t\t\t\t</ul>\n *\t\t\t\t</td>\n *\t\t\t</tr>\n *\t\t</table>\n *\n * contains five paragraph-like elements: `<h1>`, two `<td>`s and two `<li>`s.\n * Hence, if none of the features is going to convert those elements the above content will be automatically handled\n * by the paragraph feature and converted to:\n *\n *\t\t<p>Foo</p>\n *\t\t<p>X</p>\n *\t\t<p>Y</p>\n *\t\t<p>Z</p>\n *\n * Note: The `<td>` containing two `<li>` elements was ignored as the innermost paragraph-like elements\n * have a priority upon conversion.\n *\n * @member {Set.<String>} module:paragraph/paragraph~Paragraph.paragraphLikeElements\n */\nParagraph.paragraphLikeElements = new Set( [\n\t'blockquote',\n\t'dd',\n\t'div',\n\t'dt',\n\t'h1',\n\t'h2',\n\t'h3',\n\t'h4',\n\t'h5',\n\t'h6',\n\t'li',\n\t'p',\n\t'td'\n] );\n\nfunction wrapInParagraph( input, position, conversionApi ) {\n\tconst paragraph = conversionApi.writer.createElement( 'paragraph' );\n\n\tconversionApi.writer.insert( paragraph, position );\n\treturn conversionApi.convertItem( input, conversionApi.writer.createPositionAt( paragraph, 0 ) );\n}\n\nfunction isParagraphable( node, position, schema ) {\n\tconst context = schema.createContext( position );\n\n\t// When paragraph is allowed in this context...\n\tif ( !schema.checkChild( context, 'paragraph' ) ) {\n\t\treturn false;\n\t}\n\n\t// And a node would be allowed in this paragraph...\n\tif ( !schema.checkChild( context.push( 'paragraph' ), node ) ) {\n\t\treturn false;\n\t}\n\n\treturn true;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/headingcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The heading command. It is used by the {@link module:heading/heading~Heading heading feature} to apply headings.\n *\n * @extends module:core/command~Command\n */\nexport default class HeadingCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor Editor instance.\n\t * @param {Array.<String>} modelElements Names of the element which this command can apply in the model.\n\t */\n\tconstructor( editor, modelElements ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * If the selection starts in a heading (which {@link #modelElements is supported by this command})\n\t\t * the value is set to the name of that heading model element.\n\t\t * It is set to `false` otherwise.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean|String} #value\n\t\t */\n\n\t\t/**\n\t\t * Set of defined model's elements names that this command support.\n\t\t * See {@link module:heading/heading~HeadingOption}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>}\n\t\t */\n\t\tthis.modelElements = modelElements;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst block = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\tthis.value = !!block && this.modelElements.includes( block.name ) && block.name;\n\t\tthis.isEnabled = !!block && this.modelElements.some( heading => checkCanBecomeHeading( block, heading, this.editor.model.schema ) );\n\t}\n\n\t/**\n\t * Executes the command. Applies the heading to the selected blocks or, if the first selected\n\t * block is a heading already, turns selected headings (of this level only) to paragraphs.\n\t *\n\t * @param {Object} options\n\t * @param {String} options.value Name of the element which this command will apply in the model.\n\t * @fires execute\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\tconst modelElement = options.value;\n\n\t\tmodel.change( writer => {\n\t\t\tconst blocks = Array.from( document.selection.getSelectedBlocks() )\n\t\t\t\t.filter( block => {\n\t\t\t\t\treturn checkCanBecomeHeading( block, modelElement, model.schema );\n\t\t\t\t} );\n\n\t\t\tfor ( const block of blocks ) {\n\t\t\t\tif ( !block.is( modelElement ) ) {\n\t\t\t\t\twriter.rename( block, modelElement );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Checks whether the given block can be replaced by a specific heading.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:heading/headingcommand~HeadingCommand#modelElement} heading Command element name in the model.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeHeading( block, heading, schema ) {\n\treturn schema.checkChild( block.parent, heading ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/headingediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\nimport HeadingCommand from './headingcommand';\n\nimport priorities from '@ckeditor/ckeditor5-utils/src/priorities';\n\nconst defaultModelElement = 'paragraph';\n\n/**\n * The headings engine feature. It handles switching between block formats – headings and paragraph.\n * This class represents the engine part of the heading feature. See also {@link module:heading/heading~Heading}.\n * It introduces `heading1`-`headingN` commands which allow to convert paragraphs into headings.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class HeadingEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'HeadingEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\teditor.config.define( 'heading', {\n\t\t\toptions: [\n\t\t\t\t{ model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },\n\t\t\t\t{ model: 'heading1', view: 'h2', title: 'Heading 1', class: 'ck-heading_heading1' },\n\t\t\t\t{ model: 'heading2', view: 'h3', title: 'Heading 2', class: 'ck-heading_heading2' },\n\t\t\t\t{ model: 'heading3', view: 'h4', title: 'Heading 3', class: 'ck-heading_heading3' }\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Paragraph ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst options = editor.config.get( 'heading.options' );\n\n\t\tconst modelElements = [];\n\n\t\tfor ( const option of options ) {\n\t\t\t// Skip paragraph - it is defined in required Paragraph feature.\n\t\t\tif ( option.model !== defaultModelElement ) {\n\t\t\t\t// Schema.\n\t\t\t\teditor.model.schema.register( option.model, {\n\t\t\t\t\tinheritAllFrom: '$block'\n\t\t\t\t} );\n\n\t\t\t\teditor.conversion.elementToElement( option );\n\n\t\t\t\tmodelElements.push( option.model );\n\t\t\t}\n\t\t}\n\n\t\tthis._addDefaultH1Conversion( editor );\n\n\t\t// Register the heading command for this option.\n\t\teditor.commands.add( 'heading', new HeadingCommand( editor, modelElements ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\t// If the enter command is added to the editor, alter its behavior.\n\t\t// Enter at the end of a heading element should create a paragraph.\n\t\tconst editor = this.editor;\n\t\tconst enterCommand = editor.commands.get( 'enter' );\n\t\tconst options = editor.config.get( 'heading.options' );\n\n\t\tif ( enterCommand ) {\n\t\t\tthis.listenTo( enterCommand, 'afterExecute', ( evt, data ) => {\n\t\t\t\tconst positionParent = editor.model.document.selection.getFirstPosition().parent;\n\t\t\t\tconst isHeading = options.some( option => positionParent.is( option.model ) );\n\n\t\t\t\tif ( isHeading && !positionParent.is( defaultModelElement ) && positionParent.childCount === 0 ) {\n\t\t\t\t\tdata.writer.rename( positionParent, defaultModelElement );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Adds default conversion for `h1` -> `heading1` with a low priority.\n\t *\n\t * @private\n\t * @param {module:core/editor/editor~Editor} editor Editor instance on which to add the `h1` conversion.\n\t */\n\t_addDefaultH1Conversion( editor ) {\n\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t\t\tmodel: 'heading1',\n\t\t\tview: 'h1',\n\t\t\t// With a `low` priority, `paragraph` plugin autoparagraphing mechanism is executed. Make sure\n\t\t\t// this listener is called before it. If not, `h1` will be transformed into a paragraph.\n\t\t\tconverterPriority: priorities.get( 'low' ) + 1\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/model\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport { extend } from 'lodash-es';\n\n/**\n * The base MVC model class.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Model {\n\t/**\n\t * Creates a new Model instance.\n\t *\n\t * @param {Object} [attributes] The model state attributes to be defined during the instance creation.\n\t * @param {Object} [properties] The (out of state) properties to be appended to the instance during creation.\n\t */\n\tconstructor( attributes, properties ) {\n\t\t// Extend this instance with the additional (out of state) properties.\n\t\tif ( properties ) {\n\t\t\textend( this, properties );\n\t\t}\n\n\t\t// Initialize the attributes.\n\t\tif ( attributes ) {\n\t\t\tthis.set( attributes );\n\t\t}\n\t}\n}\n\nmix( Model, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module heading/headingui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Model from '@ckeditor/ckeditor5-ui/src/model';\nimport {\n createDropdown,\n addListToDropdown\n} from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport { getLocalizedOptions } from './utils';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport '../theme/heading.css';\n/**\n * The headings UI feature. It introduces the `headings` dropdown.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class HeadingUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n const options = getLocalizedOptions(editor);\n const defaultTitle = t('e');\n const dropdownTooltip = t('f');\n // Register UI component.\n editor.ui.componentFactory.add('heading', locale => {\n const titles = {};\n const itemDefinitions = new Collection();\n const headingCommand = editor.commands.get('heading');\n const paragraphCommand = editor.commands.get('paragraph');\n const commands = [headingCommand];\n for (const option of options) {\n const def = {\n type: 'button',\n model: new Model({\n label: option.title,\n class: option.class,\n withText: true\n })\n };\n if (option.model === 'paragraph') {\n def.model.bind('isOn').to(paragraphCommand, 'value');\n def.model.set('commandName', 'paragraph');\n commands.push(paragraphCommand);\n } else {\n def.model.bind('isOn').to(headingCommand, 'value', value => value === option.model);\n def.model.set({\n commandName: 'heading',\n commandValue: option.model\n });\n }\n // Add the option to the collection.\n itemDefinitions.add(def);\n titles[option.model] = option.title;\n }\n const dropdownView = createDropdown(locale);\n addListToDropdown(dropdownView, itemDefinitions);\n dropdownView.buttonView.set({\n isOn: false,\n withText: true,\n tooltip: dropdownTooltip\n });\n dropdownView.extendTemplate({ attributes: { class: ['ck-heading-dropdown'] } });\n dropdownView.bind('isEnabled').toMany(commands, 'isEnabled', (...areEnabled) => {\n return areEnabled.some(isEnabled => isEnabled);\n });\n dropdownView.buttonView.bind('label').to(headingCommand, 'value', paragraphCommand, 'value', (value, para) => {\n const whichModel = value || para && 'paragraph';\n // If none of the commands is active, display default title.\n return titles[whichModel] ? titles[whichModel] : defaultTitle;\n });\n // Execute command when an item from the dropdown is selected.\n this.listenTo(dropdownView, 'execute', evt => {\n editor.execute(evt.source.commandName, evt.source.commandValue ? { value: evt.source.commandValue } : undefined);\n editor.editing.view.focus();\n });\n return dropdownView;\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module heading/utils\n */\n/**\n * Returns heading options as defined in `config.heading.options` but processed to consider\n * the editor localization, i.e. to display {@link module:heading/heading~HeadingOption}\n * in the correct language.\n *\n * Note: The reason behind this method is that there is no way to use {@link module:utils/locale~Locale#t}\n * when the user configuration is defined because the editor does not exist yet.\n *\n * @param {module:core/editor/editor~Editor} editor\n * @returns {Array.<module:heading/heading~HeadingOption>}.\n */\nexport function getLocalizedOptions(editor) {\n const t = editor.t;\n const localizedTitles = {\n Paragraph: t('bw'),\n 'Heading 1': t('bx'),\n 'Heading 2': t('by'),\n 'Heading 3': t('bz'),\n 'Heading 4': t('ca'),\n 'Heading 5': t('cb'),\n 'Heading 6': t('cc')\n };\n return editor.config.get('heading.options').map(option => {\n const title = localizedTitles[option.title];\n if (title && title != option.title) {\n option.title = title;\n }\n return option;\n });\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagecaption/utils\n */\n\nimport { enablePlaceholder } from '@ckeditor/ckeditor5-engine/src/view/placeholder';\nimport { toWidgetEditable } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Returns a function that creates a caption editable element for the given {@link module:engine/view/document~Document}.\n *\n * @param {module:engine/view/view~View} view\n * @param {String} placeholderText The text to be displayed when the caption is empty.\n * @returns {Function}\n */\nexport function captionElementCreator( view, placeholderText ) {\n\treturn writer => {\n\t\tconst editable = writer.createEditableElement( 'figcaption' );\n\t\twriter.setCustomProperty( 'imageCaption', true, editable );\n\n\t\tenablePlaceholder( {\n\t\t\tview,\n\t\t\telement: editable,\n\t\t\ttext: placeholderText\n\t\t} );\n\n\t\treturn toWidgetEditable( editable, writer );\n\t};\n}\n\n/**\n * Returns `true` if a given view element is the image caption editable.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isCaption( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'imageCaption' );\n}\n\n/**\n * Returns the caption model element from a given image element. Returns `null` if no caption is found.\n *\n * @param {module:engine/model/element~Element} imageModelElement\n * @returns {module:engine/model/element~Element|null}\n */\nexport function getCaptionFromImage( imageModelElement ) {\n\tfor ( const node of imageModelElement.getChildren() ) {\n\t\tif ( !!node && node.is( 'caption' ) ) {\n\t\t\treturn node;\n\t\t}\n\t}\n\n\treturn null;\n}\n\n/**\n * {@link module:engine/view/matcher~Matcher} pattern. Checks if a given element is a `<figcaption>` element that is placed\n * inside the image `<figure>` element.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {Object|null} Returns the object accepted by {@link module:engine/view/matcher~Matcher} or `null` if the element\n * cannot be matched.\n */\nexport function matchImageCaption( element ) {\n\tconst parent = element.parent;\n\n\t// Convert only captions for images.\n\tif ( element.name == 'figcaption' && parent && parent.name == 'figure' && parent.hasClass( 'image' ) ) {\n\t\treturn { name: true };\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagecaption/imagecaptionediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { isImage } from '../image/utils';\nimport {\n captionElementCreator,\n getCaptionFromImage,\n matchImageCaption\n} from './utils';\n/**\n * The image caption engine plugin.\n *\n * It registers proper converters. It takes care of adding a caption element if the image without it is inserted\n * to the model document.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageCaptionEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageCaptionEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const view = editor.editing.view;\n const schema = editor.model.schema;\n const data = editor.data;\n const editing = editor.editing;\n const t = editor.t;\n /**\n\t\t * The last selected caption editable.\n\t\t * It is used for hiding the editable when it is empty and the image widget is no longer selected.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/editableelement~EditableElement} #_lastSelectedCaption\n\t\t */\n // Schema configuration.\n schema.register('caption', {\n allowIn: 'image',\n allowContentOf: '$block',\n isLimit: true\n });\n // Add caption element to each image inserted without it.\n editor.model.document.registerPostFixer(writer => this._insertMissingModelCaptionElement(writer));\n // View to model converter for the data pipeline.\n editor.conversion.for('upcast').elementToElement({\n view: matchImageCaption,\n model: 'caption'\n });\n // Model to view converter for the data pipeline.\n const createCaptionForData = writer => writer.createContainerElement('figcaption');\n data.downcastDispatcher.on('insert:caption', captionModelToView(createCaptionForData, false));\n // Model to view converter for the editing pipeline.\n const createCaptionForEditing = captionElementCreator(view, t('am'));\n editing.downcastDispatcher.on('insert:caption', captionModelToView(createCaptionForEditing));\n // Always show caption in view when something is inserted in model.\n editing.downcastDispatcher.on('insert', this._fixCaptionVisibility(data => data.item), { priority: 'high' });\n // Hide caption when everything is removed from it.\n editing.downcastDispatcher.on('remove', this._fixCaptionVisibility(data => data.position.parent), { priority: 'high' });\n // Update caption visibility on view in post fixer.\n view.document.registerPostFixer(writer => this._updateCaptionVisibility(writer));\n }\n /**\n\t * Updates the view before each rendering, making sure that empty captions (so unnecessary ones) are hidden\n\t * and then visible when the image is selected.\n\t *\n\t * @private\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n\t * @returns {Boolean} Returns `true` when the view is updated.\n\t */\n _updateCaptionVisibility(viewWriter) {\n const mapper = this.editor.editing.mapper;\n const lastCaption = this._lastSelectedCaption;\n let viewCaption;\n // If whole image is selected.\n const modelSelection = this.editor.model.document.selection;\n const selectedElement = modelSelection.getSelectedElement();\n if (selectedElement && selectedElement.is('image')) {\n const modelCaption = getCaptionFromImage(selectedElement);\n viewCaption = mapper.toViewElement(modelCaption);\n }\n // If selection is placed inside caption.\n const position = modelSelection.getFirstPosition();\n const modelCaption = getParentCaption(position.parent);\n if (modelCaption) {\n viewCaption = mapper.toViewElement(modelCaption);\n }\n // Is currently any caption selected?\n if (viewCaption) {\n // Was any caption selected before?\n if (lastCaption) {\n // Same caption as before?\n if (lastCaption === viewCaption) {\n return showCaption(viewCaption, viewWriter);\n } else {\n hideCaptionIfEmpty(lastCaption, viewWriter);\n this._lastSelectedCaption = viewCaption;\n return showCaption(viewCaption, viewWriter);\n }\n } else {\n this._lastSelectedCaption = viewCaption;\n return showCaption(viewCaption, viewWriter);\n }\n } else {\n // Was any caption selected before?\n if (lastCaption) {\n const viewModified = hideCaptionIfEmpty(lastCaption, viewWriter);\n this._lastSelectedCaption = null;\n return viewModified;\n } else {\n return false;\n }\n }\n }\n /**\n\t * Returns a converter that fixes caption visibility during the model-to-view conversion.\n\t * Checks if the changed node is placed inside the caption element and fixes its visibility in the view.\n\t *\n\t * @private\n\t * @param {Function} nodeFinder\n\t * @returns {Function}\n\t */\n _fixCaptionVisibility(nodeFinder) {\n return (evt, data, conversionApi) => {\n const node = nodeFinder(data);\n const modelCaption = getParentCaption(node);\n const mapper = this.editor.editing.mapper;\n const viewWriter = conversionApi.writer;\n if (modelCaption) {\n const viewCaption = mapper.toViewElement(modelCaption);\n if (viewCaption) {\n if (modelCaption.childCount) {\n viewWriter.removeClass('ck-hidden', viewCaption);\n } else {\n viewWriter.addClass('ck-hidden', viewCaption);\n }\n }\n }\n };\n }\n /**\n\t * Checks whether the data inserted to the model document have an image element that has no caption element inside it.\n\t * If there is none, it adds it to the image element.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer The writer to make changes with.\n\t * @returns {Boolean} `true` if any change was applied, `false` otherwise.\n\t */\n _insertMissingModelCaptionElement(writer) {\n const model = this.editor.model;\n const changes = model.document.differ.getChanges();\n const imagesWithoutCaption = [];\n for (const entry of changes) {\n if (entry.type == 'insert' && entry.name != '$text') {\n const item = entry.position.nodeAfter;\n if (item.is('image') && !getCaptionFromImage(item)) {\n imagesWithoutCaption.push(item);\n }\n // Check elements with children for nested images.\n if (!item.is('image') && item.childCount) {\n for (const nestedItem of model.createRangeIn(item).getItems()) {\n if (nestedItem.is('image') && !getCaptionFromImage(nestedItem)) {\n imagesWithoutCaption.push(nestedItem);\n }\n }\n }\n }\n }\n for (const image of imagesWithoutCaption) {\n writer.appendElement('caption', image);\n }\n return !!imagesWithoutCaption.length;\n }\n}\n// Creates a converter that converts image caption model element to view element.\n//\n// @private\n// @param {Function} elementCreator\n// @param {Boolean} [hide=true] When set to `false` view element will not be inserted when it's empty.\n// @returns {Function}\nfunction captionModelToView(elementCreator, hide = true) {\n return (evt, data, conversionApi) => {\n const captionElement = data.item;\n // Return if element shouldn't be present when empty.\n if (!captionElement.childCount && !hide) {\n return;\n }\n if (isImage(captionElement.parent)) {\n if (!conversionApi.consumable.consume(data.item, 'insert')) {\n return;\n }\n const viewImage = conversionApi.mapper.toViewElement(data.range.start.parent);\n const viewCaption = elementCreator(conversionApi.writer);\n const viewWriter = conversionApi.writer;\n // Hide if empty.\n if (!captionElement.childCount) {\n viewWriter.addClass('ck-hidden', viewCaption);\n }\n insertViewCaptionAndBind(viewCaption, data.item, viewImage, conversionApi);\n }\n };\n}\n// Inserts `viewCaption` at the end of `viewImage` and binds it to `modelCaption`.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} viewCaption\n// @param {module:engine/model/element~Element} modelCaption\n// @param {module:engine/view/containerelement~ContainerElement} viewImage\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction insertViewCaptionAndBind(viewCaption, modelCaption, viewImage, conversionApi) {\n const viewPosition = conversionApi.writer.createPositionAt(viewImage, 'end');\n conversionApi.writer.insert(viewPosition, viewCaption);\n conversionApi.mapper.bindElements(modelCaption, viewCaption);\n}\n// Checks if the provided node or one of its ancestors is a caption element, and returns it.\n//\n// @private\n// @param {module:engine/model/node~Node} node\n// @returns {module:engine/model/element~Element|null}\nfunction getParentCaption(node) {\n const ancestors = node.getAncestors({ includeSelf: true });\n const caption = ancestors.find(ancestor => ancestor.name == 'caption');\n if (caption && caption.parent && caption.parent.name == 'image') {\n return caption;\n }\n return null;\n}\n// Hides a given caption in the view if it is empty.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} caption\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @returns {Boolean} Returns `true` if the view was modified.\nfunction hideCaptionIfEmpty(caption, viewWriter) {\n if (!caption.childCount && !caption.hasClass('ck-hidden')) {\n viewWriter.addClass('ck-hidden', caption);\n return true;\n }\n return false;\n}\n// Shows the caption.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} caption\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @returns {Boolean} Returns `true` if the view was modified.\nfunction showCaption(caption, viewWriter) {\n if (caption.hasClass('ck-hidden')) {\n viewWriter.removeClass('ck-hidden', caption);\n return true;\n }\n return false;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/imagestylecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { isImage } from '../image/utils';\n\n/**\n * The image style command. It is used to apply different image styles.\n *\n * @extends module:core/command~Command\n */\nexport default class ImageStyleCommand extends Command {\n\t/**\n\t * Creates an instance of the image style command. Each command instance is handling one style.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles The styles that this command supports.\n\t */\n\tconstructor( editor, styles ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The name of the default style, if it is present. If there is no default style, it defaults to `false`.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Boolean|String}\n\t\t */\n\t\tthis.defaultStyle = false;\n\n\t\t/**\n\t\t * A style handled by this command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} #styles\n\t\t */\n\t\tthis.styles = styles.reduce( ( styles, style ) => {\n\t\t\tstyles[ style.name ] = style;\n\n\t\t\tif ( style.isDefault ) {\n\t\t\t\tthis.defaultStyle = style.name;\n\t\t\t}\n\n\t\t\treturn styles;\n\t\t}, {} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst element = this.editor.model.document.selection.getSelectedElement();\n\n\t\tthis.isEnabled = isImage( element );\n\n\t\tif ( !element ) {\n\t\t\tthis.value = false;\n\t\t} else if ( element.hasAttribute( 'imageStyle' ) ) {\n\t\t\tconst attributeValue = element.getAttribute( 'imageStyle' );\n\t\t\tthis.value = this.styles[ attributeValue ] ? attributeValue : false;\n\t\t} else {\n\t\t\tthis.value = this.defaultStyle;\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t *\t\teditor.execute( 'imageStyle', { value: 'side' } );\n\t *\n\t * @param {Object} options\n\t * @param {String} options.value The name of the style (based on the\n\t * {@link module:image/image~ImageConfig#styles `image.styles`} configuration option).\n\t * @fires execute\n\t */\n\texecute( options ) {\n\t\tconst styleName = options.value;\n\n\t\tconst model = this.editor.model;\n\t\tconst imageElement = model.document.selection.getSelectedElement();\n\n\t\tmodel.change( writer => {\n\t\t\t// Default style means that there is no `imageStyle` attribute in the model.\n\t\t\t// https://github.com/ckeditor/ckeditor5-image/issues/147\n\t\t\tif ( this.styles[ styleName ].isDefault ) {\n\t\t\t\twriter.removeAttribute( 'imageStyle', imageElement );\n\t\t\t} else {\n\t\t\t\twriter.setAttribute( 'imageStyle', styleName, imageElement );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * @module image/imagestyle/converters\n */\n\n/**\n * Returns a converter for the `imageStyle` attribute. It can be used for adding, changing and removing the attribute.\n *\n * @param {Object} styles An object containing available styles. See {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}\n * for more details.\n * @returns {Function} A model-to-view attribute converter.\n */\nexport function modelToViewStyleAttribute( styles ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Check if there is class name associated with given value.\n\t\tconst newStyle = getStyleByName( data.attributeNewValue, styles );\n\t\tconst oldStyle = getStyleByName( data.attributeOldValue, styles );\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\tif ( oldStyle ) {\n\t\t\tviewWriter.removeClass( oldStyle.className, viewElement );\n\t\t}\n\n\t\tif ( newStyle ) {\n\t\t\tviewWriter.addClass( newStyle.className, viewElement );\n\t\t}\n\t};\n}\n\n/**\n * Returns a view-to-model converter converting image CSS classes to a proper value in the model.\n *\n * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles The styles for which the converter is created.\n * @returns {Function} A view-to-model converter.\n */\nexport function viewToModelStyleAttribute( styles ) {\n\t// Convert only non–default styles.\n\tconst filteredStyles = styles.filter( style => !style.isDefault );\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.modelRange ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewFigureElement = data.viewItem;\n\t\tconst modelImageElement = first( data.modelRange.getItems() );\n\n\t\t// Check if `imageStyle` attribute is allowed for current element.\n\t\tif ( !conversionApi.schema.checkAttribute( modelImageElement, 'imageStyle' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert style one by one.\n\t\tfor ( const style of filteredStyles ) {\n\t\t\t// Try to consume class corresponding with style.\n\t\t\tif ( conversionApi.consumable.consume( viewFigureElement, { classes: style.className } ) ) {\n\t\t\t\t// And convert this style to model attribute.\n\t\t\t\tconversionApi.writer.setAttribute( 'imageStyle', style.name, modelImageElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Returns the style with a given `name` from an array of styles.\n//\n// @param {String} name\n// @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat> } styles\n// @returns {module:image/imagestyle/imagestyleediting~ImageStyleFormat|undefined}\nfunction getStyleByName( name, styles ) {\n\tfor ( const style of styles ) {\n\t\tif ( style.name === name ) {\n\t\t\treturn style;\n\t\t}\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M2 4.5V3h16v1.5zm2.5 3V12h11V7.5h-11zM4.061 6H15.94c.586 0 1.061.407 1.061.91v5.68c0 .503-.475.91-1.061.91H4.06c-.585 0-1.06-.407-1.06-.91V6.91C3 6.406 3.475 6 4.061 6zM2 16.5V15h16v1.5z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/utils\n */\n\n/* globals console */\n\nimport fullWidthIcon from '@ckeditor/ckeditor5-core/theme/icons/object-full-width.svg';\nimport leftIcon from '@ckeditor/ckeditor5-core/theme/icons/object-left.svg';\nimport centerIcon from '@ckeditor/ckeditor5-core/theme/icons/object-center.svg';\nimport rightIcon from '@ckeditor/ckeditor5-core/theme/icons/object-right.svg';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Default image styles provided by the plugin that can be referred in the\n * {@link module:image/image~ImageConfig#styles} configuration.\n *\n * Among them, 2 default semantic content styles are available:\n *\n * * `full` is a full–width image without any CSS class,\n * * `side` is a side image styled with the `image-style-side` CSS class.\n *\n * There are also 3 styles focused on formatting:\n *\n * * `alignLeft` aligns the image to the left using the `image-style-align-left` class,\n * * `alignCenter` centers the image using the `image-style-align-center` class,\n * * `alignRight` aligns the image to the right using the `image-style-align-right` class,\n *\n * @member {Object.<String,Object>}\n */\nconst defaultStyles = {\n\t// This option is equal to the situation when no style is applied.\n\tfull: {\n\t\tname: 'full',\n\t\ttitle: 'Full size image',\n\t\ticon: fullWidthIcon,\n\t\tisDefault: true\n\t},\n\n\t// This represents a side image.\n\tside: {\n\t\tname: 'side',\n\t\ttitle: 'Side image',\n\t\ticon: rightIcon,\n\t\tclassName: 'image-style-side'\n\t},\n\n\t// This style represents an image aligned to the left.\n\talignLeft: {\n\t\tname: 'alignLeft',\n\t\ttitle: 'Left aligned image',\n\t\ticon: leftIcon,\n\t\tclassName: 'image-style-align-left'\n\t},\n\n\t// This style represents a centered image.\n\talignCenter: {\n\t\tname: 'alignCenter',\n\t\ttitle: 'Centered image',\n\t\ticon: centerIcon,\n\t\tclassName: 'image-style-align-center'\n\t},\n\n\t// This style represents an image aligned to the right.\n\talignRight: {\n\t\tname: 'alignRight',\n\t\ttitle: 'Right aligned image',\n\t\ticon: rightIcon,\n\t\tclassName: 'image-style-align-right'\n\t}\n};\n\n/**\n * Default image style icons provided by the plugin that can be referred in the\n * {@link module:image/image~ImageConfig#styles} configuration.\n *\n * There are 4 icons available: `'full'`, `'left'`, `'center'` and `'right'`.\n *\n * @member {Object.<String, String>}\n */\nconst defaultIcons = {\n\tfull: fullWidthIcon,\n\tleft: leftIcon,\n\tright: rightIcon,\n\tcenter: centerIcon\n};\n\n/**\n * Returns a {@link module:image/image~ImageConfig#styles} array with items normalized in the\n * {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat} format and a complete `icon` markup for each style.\n *\n * @returns {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>}\n */\nexport function normalizeImageStyles( configuredStyles = [] ) {\n\treturn configuredStyles.map( _normalizeStyle );\n}\n\n// Normalizes an image style provided in the {@link module:image/image~ImageConfig#styles}\n// and returns it in a {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}.\n//\n// @param {Object} style\n// @returns {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}\nfunction _normalizeStyle( style ) {\n\t// Just the name of the style has been passed.\n\tif ( typeof style == 'string' ) {\n\t\tconst styleName = style;\n\n\t\t// If it's one of the defaults, just use it.\n\t\tif ( defaultStyles[ styleName ] ) {\n\t\t\t// Clone the style to avoid overriding defaults.\n\t\t\tstyle = Object.assign( {}, defaultStyles[ styleName ] );\n\t\t}\n\t\t// If it's just a name but none of the defaults, warn because probably it's a mistake.\n\t\telse {\n\t\t\tconsole.warn(\n\t\t\t\tattachLinkToDocumentation( 'image-style-not-found: There is no such image style of given name.' ),\n\t\t\t\t{ name: styleName }\n\t\t\t);\n\n\t\t\t// Normalize the style anyway to prevent errors.\n\t\t\tstyle = {\n\t\t\t\tname: styleName\n\t\t\t};\n\t\t}\n\t}\n\t// If an object style has been passed and if the name matches one of the defaults,\n\t// extend it with defaults – the user wants to customize a default style.\n\t// Note: Don't override the user–defined style object, clone it instead.\n\telse if ( defaultStyles[ style.name ] ) {\n\t\tconst defaultStyle = defaultStyles[ style.name ];\n\t\tconst extendedStyle = Object.assign( {}, style );\n\n\t\tfor ( const prop in defaultStyle ) {\n\t\t\tif ( !style.hasOwnProperty( prop ) ) {\n\t\t\t\textendedStyle[ prop ] = defaultStyle[ prop ];\n\t\t\t}\n\t\t}\n\n\t\tstyle = extendedStyle;\n\t}\n\n\t// If an icon is defined as a string and correspond with a name\n\t// in default icons, use the default icon provided by the plugin.\n\tif ( typeof style.icon == 'string' && defaultIcons[ style.icon ] ) {\n\t\tstyle.icon = defaultIcons[ style.icon ];\n\t}\n\n\treturn style;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/imagestyleediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageStyleCommand from './imagestylecommand';\nimport { viewToModelStyleAttribute, modelToViewStyleAttribute } from './converters';\nimport { normalizeImageStyles } from './utils';\n\n/**\n * The image style engine plugin. It sets the default configuration, creates converters and registers\n * {@link module:image/imagestyle/imagestylecommand~ImageStyleCommand ImageStyleCommand}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyleEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageStyleEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\t\tconst data = editor.data;\n\t\tconst editing = editor.editing;\n\n\t\t// Define default configuration.\n\t\teditor.config.define( 'image.styles', [ 'full', 'side' ] );\n\n\t\t// Get configuration.\n\t\tconst styles = normalizeImageStyles( editor.config.get( 'image.styles' ) );\n\n\t\t// Allow imageStyle attribute in image.\n\t\t// We could call it 'style' but https://github.com/ckeditor/ckeditor5-engine/issues/559.\n\t\tschema.extend( 'image', { allowAttributes: 'imageStyle' } );\n\n\t\t// Converters for imageStyle attribute from model to view.\n\t\tconst modelToViewConverter = modelToViewStyleAttribute( styles );\n\t\tediting.downcastDispatcher.on( 'attribute:imageStyle:image', modelToViewConverter );\n\t\tdata.downcastDispatcher.on( 'attribute:imageStyle:image', modelToViewConverter );\n\n\t\t// Converter for figure element from view to model.\n\t\tdata.upcastDispatcher.on( 'element:figure', viewToModelStyleAttribute( styles ), { priority: 'low' } );\n\n\t\t// Register imageStyle command.\n\t\teditor.commands.add( 'imageStyle', new ImageStyleCommand( editor, styles ) );\n\t}\n}\n\n/**\n * The image style format descriptor.\n *\n *\t\timport fullSizeIcon from 'path/to/icon.svg';\n *\n *\t\tconst imageStyleFormat = {\n *\t\t\tname: 'fullSize',\n *\t\t\ticon: fullSizeIcon,\n *\t\t\ttitle: 'Full size image',\n *\t\t\tclassName: 'image-full-size'\n *\t\t}\n *\n * @typedef {Object} module:image/imagestyle/imagestyleediting~ImageStyleFormat\n *\n * @property {String} name The unique name of the style. It will be used to:\n *\n * * Store the chosen style in the model by setting the `imageStyle` attribute of the `<image>` element.\n * * As a value of the {@link module:image/imagestyle/imagestylecommand~ImageStyleCommand#execute `imageStyle` command},\n * * when registering a button for each of the styles (`'imageStyle:{name}'`) in the\n * {@link module:ui/componentfactory~ComponentFactory UI components factory} (this functionality is provided by the\n * {@link module:image/imagestyle/imagestyleui~ImageStyleUI} plugin).\n *\n * @property {Boolean} [isDefault] When set, the style will be used as the default one.\n * A default style does not apply any CSS class to the view element.\n *\n * @property {String} icon One of the following to be used when creating the style's button:\n *\n * * An SVG icon source (as an XML string).\n * * One of {@link module:image/imagestyle/utils~defaultIcons} to use a default icon provided by the plugin.\n *\n * @property {String} title The style's title.\n *\n * @property {String} className The CSS class used to represent the style in the view.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagestyle/imagestyleui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport { normalizeImageStyles } from './utils';\nimport '../../theme/imagestyle.css';\n/**\n * The image style UI plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyleUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageStyleUI';\n }\n /**\n\t * Returns the default localized style titles provided by the plugin.\n\t *\n\t * The following localized titles corresponding with\n\t * {@link module:image/imagestyle/utils~defaultStyles} are available:\n\t *\n\t * * `'Full size image'`,\n\t * * `'Side image'`,\n\t * * `'Left aligned image'`,\n\t * * `'Centered image'`,\n\t * * `'Right aligned image'`\n\t *\n\t * @returns {Object.<String,String>}\n\t */\n get localizedDefaultStylesTitles() {\n const t = this.editor.t;\n return {\n 'Full size image': t('ah'),\n 'Side image': t('ai'),\n 'Left aligned image': t('aj'),\n 'Centered image': t('ak'),\n 'Right aligned image': t('al')\n };\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const configuredStyles = editor.config.get('image.styles');\n const translatedStyles = translateStyles(normalizeImageStyles(configuredStyles), this.localizedDefaultStylesTitles);\n for (const style of translatedStyles) {\n this._createButton(style);\n }\n }\n /**\n\t * Creates a button for each style and stores it in the editor {@link module:ui/componentfactory~ComponentFactory ComponentFactory}.\n\t *\n\t * @private\n\t * @param {module:image/imagestyle/imagestyleediting~ImageStyleFormat} style\n\t */\n _createButton(style) {\n const editor = this.editor;\n const componentName = `imageStyle:${ style.name }`;\n editor.ui.componentFactory.add(componentName, locale => {\n const command = editor.commands.get('imageStyle');\n const view = new ButtonView(locale);\n view.set({\n label: style.title,\n icon: style.icon,\n tooltip: true,\n isToggleable: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n view.bind('isOn').to(command, 'value', value => value === style.name);\n this.listenTo(view, 'execute', () => editor.execute('imageStyle', { value: style.name }));\n return view;\n });\n }\n}\n/**\n * Returns the translated `title` from the passed styles array.\n *\n * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles\n * @param titles\n * @returns {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>}\n */\nfunction translateStyles(styles, titles) {\n for (const style of styles) {\n // Localize the titles of the styles, if a title corresponds with\n // a localized default provided by the plugin.\n if (titles[style.title]) {\n style.title = titles[style.title];\n }\n }\n return styles;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module widget/widgettoolbarrepository\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport ToolbarView from '@ckeditor/ckeditor5-ui/src/toolbar/toolbarview';\nimport BalloonPanelView from '@ckeditor/ckeditor5-ui/src/panel/balloon/balloonpanelview';\nimport { isWidget } from './utils';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n/**\n * Widget toolbar repository plugin. A central point for registering widget toolbars. This plugin handles the whole\n * toolbar rendering process and exposes a concise API.\n *\n * To add a toolbar for your widget use the {@link ~WidgetToolbarRepository#register `WidgetToolbarRepository#register()`} method.\n *\n * The following example comes from the {@link module:image/imagetoolbar~ImageToolbar} plugin:\n *\n * \t\tclass ImageToolbar extends Plugin {\n *\t\t\tstatic get requires() {\n *\t\t\t\treturn [ WidgetToolbarRepository ];\n *\t\t\t}\n *\n *\t\t\tafterInit() {\n *\t\t\t\tconst editor = this.editor;\n *\t\t\t\tconst widgetToolbarRepository = editor.plugins.get( WidgetToolbarRepository );\n *\n *\t\t\t\twidgetToolbarRepository.register( 'image', {\n *\t\t\t\t\titems: editor.config.get( 'image.toolbar' ),\n *\t\t\t\t\tgetRelatedElement: getSelectedImageWidget\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n */\nexport default class WidgetToolbarRepository extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'WidgetToolbarRepository';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n // Disables the default balloon toolbar for all widgets.\n if (editor.plugins.has('BalloonToolbar')) {\n const balloonToolbar = editor.plugins.get('BalloonToolbar');\n this.listenTo(balloonToolbar, 'show', evt => {\n if (isWidgetSelected(editor.editing.view.document.selection)) {\n evt.stop();\n }\n }, { priority: 'high' });\n }\n /**\n\t\t * A map of toolbar definitions.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<String,module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition>} #_toolbarDefinitions\n\t\t */\n this._toolbarDefinitions = new Map();\n /**\n\t\t * @private\n\t\t */\n this._balloon = this.editor.plugins.get('ContextualBalloon');\n this.listenTo(editor.ui, 'update', () => {\n this._updateToolbarsVisibility();\n });\n // UI#update is not fired after focus is back in editor, we need to check if balloon panel should be visible.\n this.listenTo(editor.ui.focusTracker, 'change:isFocused', () => {\n this._updateToolbarsVisibility();\n }, { priority: 'low' });\n }\n destroy() {\n super.destroy();\n for (const toolbarConfig of this._toolbarDefinitions.values()) {\n toolbarConfig.view.destroy();\n }\n }\n /**\n\t * Registers toolbar in the WidgetToolbarRepository. It renders it in the `ContextualBalloon` based on the value of the invoked\n\t * `getRelatedElement` function. Toolbar items are gathered from `items` array.\n\t * The balloon's CSS class is by default `ck-toolbar-container` and may be override with the `balloonClassName` option.\n\t *\n\t * Note: This method should be called in the {@link module:core/plugin~PluginInterface#afterInit `Plugin#afterInit()`}\n\t * callback (or later) to make sure that the given toolbar items were already registered by other plugins.\n\t *\n\t * @param {String} toolbarId An id for the toolbar. Used to\n\t * @param {Object} options\n\t * @param {String} [options.ariaLabel] Label used by assistive technologies to describe this toolbar element.\n\t * @param {Array.<String>} options.items Array of toolbar items.\n\t * @param {Function} options.getRelatedElement Callback which returns an element the toolbar should be attached to.\n\t * @param {String} [options.balloonClassName='ck-toolbar-container'] CSS class for the widget balloon.\n\t */\n register(toolbarId, {ariaLabel, items, getRelatedElement, balloonClassName = 'ck-toolbar-container'}) {\n const editor = this.editor;\n const t = editor.t;\n const toolbarView = new ToolbarView(editor.locale);\n toolbarView.ariaLabel = ariaLabel || t('ax');\n if (this._toolbarDefinitions.has(toolbarId)) {\n /**\n\t\t\t * Toolbar with the given id was already added.\n\t\t\t *\n\t\t\t * @error widget-toolbar-duplicated\n\t\t\t * @param toolbarId Toolbar id.\n\t\t\t */\n throw new CKEditorError('widget-toolbar-duplicated: Toolbar with the given id was already added.', this, { toolbarId });\n }\n toolbarView.fillFromConfig(items, editor.ui.componentFactory);\n this._toolbarDefinitions.set(toolbarId, {\n view: toolbarView,\n getRelatedElement,\n balloonClassName\n });\n }\n /**\n\t * Iterates over stored toolbars and makes them visible or hidden.\n\t *\n\t * @private\n\t */\n _updateToolbarsVisibility() {\n let maxRelatedElementDepth = 0;\n let deepestRelatedElement = null;\n let deepestToolbarDefinition = null;\n for (const definition of this._toolbarDefinitions.values()) {\n const relatedElement = definition.getRelatedElement(this.editor.editing.view.document.selection);\n if (!this.editor.ui.focusTracker.isFocused) {\n if (this._isToolbarVisible(definition)) {\n this._hideToolbar(definition);\n }\n } else if (!relatedElement) {\n if (this._isToolbarInBalloon(definition)) {\n this._hideToolbar(definition);\n }\n } else {\n const relatedElementDepth = relatedElement.getAncestors().length;\n // Many toolbars can express willingness to be displayed but they do not know about\n // each other. Figure out which toolbar is deepest in the view tree to decide which\n // should be displayed. For instance, if a selected image is inside a table cell, display\n // the ImageToolbar rather than the TableToolbar (#60).\n if (relatedElementDepth > maxRelatedElementDepth) {\n maxRelatedElementDepth = relatedElementDepth;\n deepestRelatedElement = relatedElement;\n deepestToolbarDefinition = definition;\n }\n }\n }\n if (deepestToolbarDefinition) {\n this._showToolbar(deepestToolbarDefinition, deepestRelatedElement);\n }\n }\n /**\n\t * Hides the given toolbar.\n\t *\n\t * @private\n\t * @param {module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition} toolbarDefinition\n\t */\n _hideToolbar(toolbarDefinition) {\n this._balloon.remove(toolbarDefinition.view);\n this.stopListening(this._balloon, 'change:visibleView');\n }\n /**\n\t * Shows up the toolbar if the toolbar is not visible.\n\t * Otherwise, repositions the toolbar's balloon when toolbar's view is the most top view in balloon stack.\n\t *\n\t * It might happen here that the toolbar's view is under another view. Then do nothing as the other toolbar view\n\t * should be still visible after the {@link module:core/editor/editorui~EditorUI#event:update}.\n\t *\n\t * @private\n\t * @param {module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition} toolbarDefinition\n\t * @param {module:engine/view/element~Element} relatedElement\n\t */\n _showToolbar(toolbarDefinition, relatedElement) {\n if (this._isToolbarVisible(toolbarDefinition)) {\n repositionContextualBalloon(this.editor, relatedElement);\n } else if (!this._isToolbarInBalloon(toolbarDefinition)) {\n this._balloon.add({\n view: toolbarDefinition.view,\n position: getBalloonPositionData(this.editor, relatedElement),\n balloonClassName: toolbarDefinition.balloonClassName\n });\n // Update toolbar position each time stack with toolbar view is switched to visible.\n // This is in a case target element has changed when toolbar was in invisible stack\n // e.g. target image was wrapped by a block quote.\n // See https://github.com/ckeditor/ckeditor5-widget/issues/92.\n this.listenTo(this._balloon, 'change:visibleView', () => {\n for (const definition of this._toolbarDefinitions.values()) {\n if (this._isToolbarVisible(definition)) {\n const relatedElement = definition.getRelatedElement(this.editor.editing.view.document.selection);\n repositionContextualBalloon(this.editor, relatedElement);\n }\n }\n });\n }\n }\n /**\n\t * @private\n\t * @param {Object} toolbar\n\t * @returns {Boolean}\n\t */\n _isToolbarVisible(toolbar) {\n return this._balloon.visibleView === toolbar.view;\n }\n /**\n\t * @private\n\t * @param {Object} toolbar\n\t * @returns {Boolean}\n\t */\n _isToolbarInBalloon(toolbar) {\n return this._balloon.hasView(toolbar.view);\n }\n}\nfunction repositionContextualBalloon(editor, relatedElement) {\n const balloon = editor.plugins.get('ContextualBalloon');\n const position = getBalloonPositionData(editor, relatedElement);\n balloon.updatePosition(position);\n}\nfunction getBalloonPositionData(editor, relatedElement) {\n const editingView = editor.editing.view;\n const defaultPositions = BalloonPanelView.defaultPositions;\n return {\n target: editingView.domConverter.mapViewToDom(relatedElement),\n positions: [\n defaultPositions.northArrowSouth,\n defaultPositions.northArrowSouthWest,\n defaultPositions.northArrowSouthEast,\n defaultPositions.southArrowNorth,\n defaultPositions.southArrowNorthWest,\n defaultPositions.southArrowNorthEast\n ]\n };\n}\nfunction isWidgetSelected(selection) {\n const viewElement = selection.getSelectedElement();\n return !!(viewElement && isWidget(viewElement));\n} /**\n * The toolbar definition object used by the toolbar repository to manage toolbars.\n * It contains information necessary to display the toolbar in the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} and\n * update it during its life (display) cycle.\n *\n * @typedef {Object} module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition\n *\n * @property {module:ui/view~View} view The UI view of the toolbar.\n * @property {Function} getRelatedElement A function that returns an engine {@link module:engine/view/view~View}\n * element the toolbar is to be attached to. For instance, an image widget or a table widget (or `null` when\n * there is no such element). The function accepts an instance of {@link module:engine/view/selection~Selection}.\n * @property {String} balloonClassName CSS class for the widget balloon when a toolbar is displayed.\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Command from './command';\n\n/**\n * @module core/multicommand\n */\n\n/**\n * A CKEditor command that aggregates other commands.\n *\n * This command is used to proxy multiple commands. The multi-command is enabled when\n * at least one of its registered child commands is enabled.\n * When executing a multi-command the first command that is enabled will be executed.\n *\n *\t\tconst multiCommand = new MultiCommand( editor );\n *\n *\t\tconst commandFoo = new Command( editor );\n *\t\tconst commandBar = new Command( editor );\n *\n *\t\t// Register child commands.\n *\t\tmultiCommand.registerChildCommand( commandFoo );\n *\t\tmultiCommand.registerChildCommand( commandBar );\n *\n *\t\t// Enable one of the commands.\n *\t\tcommandBar.isEnabled = true;\n *\n *\t\tmultiCommand.execute(); // Will execute commandBar.\n *\n * @extends module:core/command~Command\n */\nexport default class MultiCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Registered child commands.\n\t\t *\n\t\t * @type {Array.<module:core/command~Command>}\n\t\t * @private\n\t\t */\n\t\tthis._childCommands = [];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\t// Override base command refresh(): the command's state is changed when one of child commands changes states.\n\t}\n\n\t/**\n\t * Executes the first of it registered child commands.\n\t */\n\texecute( ...args ) {\n\t\tconst command = this._getFirstEnabledCommand();\n\n\t\tcommand.execute( args );\n\t}\n\n\t/**\n\t * Registers a child command.\n\t *\n\t * @param {module:core/command~Command} command\n\t */\n\tregisterChildCommand( command ) {\n\t\tthis._childCommands.push( command );\n\n\t\t// Change multi command enabled state when one of registered commands changes state.\n\t\tcommand.on( 'change:isEnabled', () => this._checkEnabled() );\n\n\t\tthis._checkEnabled();\n\t}\n\n\t/**\n\t * Checks if any of child commands is enabled.\n\t *\n\t * @private\n\t */\n\t_checkEnabled() {\n\t\tthis.isEnabled = !!this._getFirstEnabledCommand();\n\t}\n\n\t/**\n\t * Returns a first enabled command or undefined if none of them is enabled.\n\t *\n\t * @returns {module:core/command~Command|undefined}\n\t * @private\n\t */\n\t_getFirstEnabledCommand() {\n\t\treturn this._childCommands.find( command => command.isEnabled );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module indent/indentediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport MultiCommand from '@ckeditor/ckeditor5-core/src/multicommand';\n\n/**\n * The indent editing feature.\n *\n * This plugin registers the `'indent'` and `'outdent'` commands.\n *\n * **Note**: In order for the commands to work, at least one of the compatible features is required. Read more in the\n * {@link module:indent/indent~Indent indent feature} API documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class IndentEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'IndentEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\teditor.commands.add( 'indent', new MultiCommand( editor ) );\n\t\teditor.commands.add( 'outdent', new MultiCommand( editor ) );\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z\\\"/><path d=\\\"M1.632 6.95L5.02 9.358a.4.4 0 0 1-.013.661l-3.39 2.207A.4.4 0 0 1 1 11.892V7.275a.4.4 0 0 1 .632-.326z\\\"/></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module indent/indentui\n */\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport indentIcon from '../theme/icons/indent.svg';\nimport outdentIcon from '../theme/icons/outdent.svg';\n/**\n * The indent UI feature.\n *\n * This plugin registers the `'indent'` and `'outdent'` buttons.\n *\n * **Note**: In order for the commands to work, at least one of the compatible features is required. Read more in\n * the {@link module:indent/indent~Indent indent feature} API documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class IndentUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'IndentUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const locale = editor.locale;\n const t = editor.t;\n const localizedIndentIcon = locale.uiLanguageDirection == 'ltr' ? indentIcon : outdentIcon;\n const localizedOutdentIcon = locale.uiLanguageDirection == 'ltr' ? outdentIcon : indentIcon;\n this._defineButton('indent', t('k'), localizedIndentIcon);\n this._defineButton('outdent', t('l'), localizedOutdentIcon);\n }\n /**\n\t * Defines a UI button.\n\t *\n\t * @param {String} commandName\n\t * @param {String} label\n\t * @param {String} icon\n\t * @private\n\t */\n _defineButton(commandName, label, icon) {\n const editor = this.editor;\n editor.ui.componentFactory.add(commandName, locale => {\n const command = editor.commands.get(commandName);\n const view = new ButtonView(locale);\n view.set({\n label,\n icon,\n tooltip: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n this.listenTo(view, 'execute', () => editor.execute(commandName));\n return view;\n });\n }\n}","\n/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/clickobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:click Click} event observer.\n *\n * Note that this observer is not available by default. To make it available it needs to be added to\n * {@link module:engine/view/view~View view controller}\n * by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class ClickObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = 'click';\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when one of the editables has been clicked.\n *\n * Introduced by {@link module:engine/view/observer/clickobserver~ClickObserver}.\n *\n * Note that this event is not available by default. To make it available\n * {@link module:engine/view/observer/clickobserver~ClickObserver} needs to be added\n * to {@link module:engine/view/view~View} by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @see module:engine/view/observer/clickobserver~ClickObserver\n * @event module:engine/view/document~Document#event:click\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/ui/linkformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport SwitchButtonView from '@ckeditor/ckeditor5-ui/src/button/switchbuttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../theme/linkform.css';\n/**\n * The link form view controller class.\n *\n * See {@link module:link/ui/linkformview~LinkFormView}.\n *\n * @extends module:ui/view~View\n */\nexport default class LinkFormView extends View {\n /**\n\t * Creates an instance of the {@link module:link/ui/linkformview~LinkFormView} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t * @param {module:utils/collection~Collection} [manualDecorators] Reference to manual decorators in\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n\t */\n constructor(locale, manualDecorators = []) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The URL input view.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t\t */\n this.urlInputView = this._createUrlInput();\n /**\n\t\t * The Save button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * The Cancel button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of {@link module:ui/button/switchbuttonview~SwitchButtonView},\n\t\t * which corresponds to {@link module:link/linkcommand~LinkCommand#manualDecorators manual decorators}\n\t\t * configured in the editor.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._manualDecoratorSwitches = this._createManualDecoratorSwitches(manualDecorators);\n /**\n\t\t * A collection of child views in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this._createFormChildren(manualDecorators);\n /**\n\t\t * A collection of views that can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n const classList = [\n 'ck',\n 'ck-link-form'\n ];\n if (manualDecorators.length) {\n classList.push('ck-link-form_layout-vertical');\n }\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: classList,\n // https://github.com/ckeditor/ckeditor5-link/issues/90\n tabindex: '-1'\n },\n children: this.children\n });\n }\n /**\n\t * Obtains the state of the {@link module:ui/button/switchbuttonview~SwitchButtonView switch buttons} representing\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators manual link decorators}\n\t * in the {@link module:link/ui/linkformview~LinkFormView}.\n\t *\n\t * @returns {Object.<String,Boolean>} Key-value pairs, where the key is the name of the decorator and the value is\n\t * its state.\n\t */\n getDecoratorSwitchesState() {\n return Array.from(this._manualDecoratorSwitches).reduce((accumulator, switchButton) => {\n accumulator[switchButton.name] = switchButton.isOn;\n return accumulator;\n }, {});\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n submitHandler({ view: this });\n const childViews = [\n this.urlInputView,\n ...this._manualDecoratorSwitches,\n this.saveButtonView,\n this.cancelButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the form.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Creates a labeled input view.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView} Labeled input view instance.\n\t */\n _createUrlInput() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n labeledInput.label = t('bk');\n labeledInput.inputView.placeholder = 'https://example.com';\n return labeledInput;\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n /**\n\t * Populates {@link module:ui/viewcollection~ViewCollection} of {@link module:ui/button/switchbuttonview~SwitchButtonView}\n\t * made based on {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n\t *\n\t * @private\n\t * @param {module:utils/collection~Collection} manualDecorators A reference to the\n\t * collection of manual decorators stored in the link command.\n\t * @returns {module:ui/viewcollection~ViewCollection} of switch buttons.\n\t */\n _createManualDecoratorSwitches(manualDecorators) {\n const switches = this.createCollection();\n for (const manualDecorator of manualDecorators) {\n const switchButton = new SwitchButtonView(this.locale);\n switchButton.set({\n name: manualDecorator.id,\n label: manualDecorator.label,\n withText: true\n });\n switchButton.bind('isOn').to(manualDecorator, 'value');\n switchButton.on('execute', () => {\n manualDecorator.set('value', !switchButton.isOn);\n });\n switches.add(switchButton);\n }\n return switches;\n }\n /**\n\t * Populates the {@link #children} collection of the form.\n\t *\n\t * If {@link module:link/linkcommand~LinkCommand#manualDecorators manual decorators} are configured in the editor, it creates an\n\t * additional `View` wrapping all {@link #_manualDecoratorSwitches} switch buttons corresponding\n\t * to these decorators.\n\t *\n\t * @private\n\t * @param {module:utils/collection~Collection} manualDecorators A reference to\n\t * the collection of manual decorators stored in the link command.\n\t * @returns {module:ui/viewcollection~ViewCollection} The children of link form view.\n\t */\n _createFormChildren(manualDecorators) {\n const children = this.createCollection();\n children.add(this.urlInputView);\n if (manualDecorators.length) {\n const additionalButtonsView = new View();\n additionalButtonsView.setTemplate({\n tag: 'ul',\n children: this._manualDecoratorSwitches.map(switchButton => ({\n tag: 'li',\n children: [switchButton],\n attributes: {\n class: [\n 'ck',\n 'ck-list__item'\n ]\n }\n })),\n attributes: {\n class: [\n 'ck',\n 'ck-reset',\n 'ck-list'\n ]\n }\n });\n children.add(additionalButtonsView);\n }\n children.add(this.saveButtonView);\n children.add(this.cancelButtonView);\n return children;\n }\n} /**\n * Fired when the form view is submitted (when one of the children triggered the submit event),\n * for example with a click on {@link #saveButtonView}.\n *\n * @event submit\n */\n /**\n * Fired when the form view is canceled, for example with a click on {@link #cancelButtonView}.\n *\n * @event cancel\n */","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184zm4.919 10.562l-1.414 1.414a.75.75 0 1 1-1.06-1.06l1.414-1.415-1.415-1.414a.75.75 0 0 1 1.061-1.06l1.414 1.414 1.414-1.415a.75.75 0 0 1 1.061 1.061l-1.414 1.414 1.414 1.415a.75.75 0 0 1-1.06 1.06l-1.415-1.414z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/ui/linkactionsview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport { ensureSafeUrl } from '../utils';\nimport unlinkIcon from '../../theme/icons/unlink.svg';\nimport pencilIcon from '@ckeditor/ckeditor5-core/theme/icons/pencil.svg';\nimport '../../theme/linkactions.css';\n/**\n * The link actions view class. This view displays the link preview, allows\n * unlinking or editing the link.\n *\n * @extends module:ui/view~View\n */\nexport default class LinkActionsView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the actions.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The href preview view.\n\t\t *\n\t\t * @member {module:ui/view~View}\n\t\t */\n this.previewButtonView = this._createPreviewButton();\n /**\n\t\t * The unlink button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.unlinkButtonView = this._createButton(t('bb'), unlinkIcon, 'unlink');\n /**\n\t\t * The edit link button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.editButtonView = this._createButton(t('bc'), pencilIcon, 'edit');\n /**\n\t\t * The value of the \"href\" attribute of the link to use in the {@link #previewButtonView}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String}\n\t\t */\n this.set('href');\n /**\n\t\t * A collection of views that can be focused in the view.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the view.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-link-actions'\n ],\n // https://github.com/ckeditor/ckeditor5-link/issues/90\n tabindex: '-1'\n },\n children: [\n this.previewButtonView,\n this.editButtonView,\n this.unlinkButtonView\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n const childViews = [\n this.previewButtonView,\n this.editButtonView,\n this.unlinkButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the actions.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.delegate('execute').to(this, eventName);\n return button;\n }\n /**\n\t * Creates a link href preview button.\n\t *\n\t * @private\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createPreviewButton() {\n const button = new ButtonView(this.locale);\n const bind = this.bindTemplate;\n const t = this.t;\n button.set({\n withText: true,\n tooltip: t('bd')\n });\n button.extendTemplate({\n attributes: {\n class: [\n 'ck',\n 'ck-link-actions__preview'\n ],\n href: bind.to('href', href => href && ensureSafeUrl(href)),\n target: '_blank',\n rel: 'noopener noreferrer'\n }\n });\n button.bind('label').to(this, 'href', href => {\n return href || t('be');\n });\n button.bind('isEnabled').to(this, 'href', href => !!href);\n button.template.tag = 'a';\n button.template.eventListeners = {};\n return button;\n }\n} /**\n * Fired when the {@link #editButtonView} is clicked.\n *\n * @event edit\n */\n /**\n * Fired when the {@link #unlinkButtonView} is clicked.\n *\n * @event unlink\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/linkui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ClickObserver from '@ckeditor/ckeditor5-engine/src/view/observer/clickobserver';\nimport { isLinkElement } from './utils';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport clickOutsideHandler from '@ckeditor/ckeditor5-ui/src/bindings/clickoutsidehandler';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LinkFormView from './ui/linkformview';\nimport LinkActionsView from './ui/linkactionsview';\nimport linkIcon from '../theme/icons/link.svg';\nconst linkKeystroke = 'Ctrl+K';\n/**\n * The link UI plugin. It introduces the `'link'` and `'unlink'` buttons and support for the <kbd>Ctrl+K</kbd> keystroke.\n *\n * It uses the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon plugin}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class LinkUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'LinkUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n editor.editing.view.addObserver(ClickObserver);\n /**\n\t\t * The actions view displayed inside of the balloon.\n\t\t *\n\t\t * @member {module:link/ui/linkactionsview~LinkActionsView}\n\t\t */\n this.actionsView = this._createActionsView();\n /**\n\t\t * The form view displayed inside the balloon.\n\t\t *\n\t\t * @member {module:link/ui/linkformview~LinkFormView}\n\t\t */\n this.formView = this._createFormView();\n /**\n\t\t * The contextual balloon plugin instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:ui/panel/balloon/contextualballoon~ContextualBalloon}\n\t\t */\n this._balloon = editor.plugins.get(ContextualBalloon);\n // Create toolbar buttons.\n this._createToolbarLinkButton();\n // Attach lifecycle actions to the the balloon.\n this._enableUserBalloonInteractions();\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n super.destroy();\n // Destroy created UI components as they are not automatically destroyed (see ckeditor5#1341).\n this.formView.destroy();\n }\n /**\n\t * Creates the {@link module:link/ui/linkactionsview~LinkActionsView} instance.\n\t *\n\t * @private\n\t * @returns {module:link/ui/linkactionsview~LinkActionsView} The link actions view instance.\n\t */\n _createActionsView() {\n const editor = this.editor;\n const actionsView = new LinkActionsView(editor.locale);\n const linkCommand = editor.commands.get('link');\n const unlinkCommand = editor.commands.get('unlink');\n actionsView.bind('href').to(linkCommand, 'value');\n actionsView.editButtonView.bind('isEnabled').to(linkCommand);\n actionsView.unlinkButtonView.bind('isEnabled').to(unlinkCommand);\n // Execute unlink command after clicking on the \"Edit\" button.\n this.listenTo(actionsView, 'edit', () => {\n this._addFormView();\n });\n // Execute unlink command after clicking on the \"Unlink\" button.\n this.listenTo(actionsView, 'unlink', () => {\n editor.execute('unlink');\n this._hideUI();\n });\n // Close the panel on esc key press when the **actions have focus**.\n actionsView.keystrokes.set('Esc', (data, cancel) => {\n this._hideUI();\n cancel();\n });\n // Open the form view on Ctrl+K when the **actions have focus**..\n actionsView.keystrokes.set(linkKeystroke, (data, cancel) => {\n this._addFormView();\n cancel();\n });\n return actionsView;\n }\n /**\n\t * Creates the {@link module:link/ui/linkformview~LinkFormView} instance.\n\t *\n\t * @private\n\t * @returns {module:link/ui/linkformview~LinkFormView} The link form view instance.\n\t */\n _createFormView() {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n const formView = new LinkFormView(editor.locale, linkCommand.manualDecorators);\n formView.urlInputView.bind('value').to(linkCommand, 'value');\n // Form elements should be read-only when corresponding commands are disabled.\n formView.urlInputView.bind('isReadOnly').to(linkCommand, 'isEnabled', value => !value);\n formView.saveButtonView.bind('isEnabled').to(linkCommand);\n // Execute link command after clicking the \"Save\" button.\n this.listenTo(formView, 'submit', () => {\n editor.execute('link', formView.urlInputView.inputView.element.value, formView.getDecoratorSwitchesState());\n this._closeFormView();\n });\n // Hide the panel after clicking the \"Cancel\" button.\n this.listenTo(formView, 'cancel', () => {\n this._closeFormView();\n });\n // Close the panel on esc key press when the **form has focus**.\n formView.keystrokes.set('Esc', (data, cancel) => {\n this._closeFormView();\n cancel();\n });\n return formView;\n }\n /**\n\t * Creates a toolbar Link button. Clicking this button will show\n\t * a {@link #_balloon} attached to the selection.\n\t *\n\t * @private\n\t */\n _createToolbarLinkButton() {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n const t = editor.t;\n // Handle the `Ctrl+K` keystroke and show the panel.\n editor.keystrokes.set(linkKeystroke, (keyEvtData, cancel) => {\n // Prevent focusing the search bar in FF and opening new tab in Edge. #153, #154.\n cancel();\n if (linkCommand.isEnabled) {\n this._showUI(true);\n }\n });\n editor.ui.componentFactory.add('link', locale => {\n const button = new ButtonView(locale);\n button.isEnabled = true;\n button.label = t('as');\n button.icon = linkIcon;\n button.keystroke = linkKeystroke;\n button.tooltip = true;\n button.isToggleable = true;\n // Bind button to the command.\n button.bind('isEnabled').to(linkCommand, 'isEnabled');\n button.bind('isOn').to(linkCommand, 'value', value => !!value);\n // Show the panel on button click.\n this.listenTo(button, 'execute', () => this._showUI(true));\n return button;\n });\n }\n /**\n\t * Attaches actions that control whether the balloon panel containing the\n\t * {@link #formView} is visible or not.\n\t *\n\t * @private\n\t */\n _enableUserBalloonInteractions() {\n const viewDocument = this.editor.editing.view.document;\n // Handle click on view document and show panel when selection is placed inside the link element.\n // Keep panel open until selection will be inside the same link element.\n this.listenTo(viewDocument, 'click', () => {\n const parentLink = this._getSelectedLinkElement();\n if (parentLink) {\n // Then show panel but keep focus inside editor editable.\n this._showUI();\n }\n });\n // Focus the form if the balloon is visible and the Tab key has been pressed.\n this.editor.keystrokes.set('Tab', (data, cancel) => {\n if (this._areActionsVisible && !this.actionsView.focusTracker.isFocused) {\n this.actionsView.focus();\n cancel();\n }\n }, {\n // Use the high priority because the link UI navigation is more important\n // than other feature's actions, e.g. list indentation.\n // https://github.com/ckeditor/ckeditor5-link/issues/146\n priority: 'high'\n });\n // Close the panel on the Esc key press when the editable has focus and the balloon is visible.\n this.editor.keystrokes.set('Esc', (data, cancel) => {\n if (this._isUIVisible) {\n this._hideUI();\n cancel();\n }\n });\n // Close on click outside of balloon panel element.\n clickOutsideHandler({\n emitter: this.formView,\n activator: () => this._isUIInPanel,\n contextElements: [this._balloon.view.element],\n callback: () => this._hideUI()\n });\n }\n /**\n\t * Adds the {@link #actionsView} to the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _addActionsView() {\n if (this._areActionsInPanel) {\n return;\n }\n this._balloon.add({\n view: this.actionsView,\n position: this._getBalloonPositionData()\n });\n }\n /**\n\t * Adds the {@link #formView} to the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _addFormView() {\n if (this._isFormInPanel) {\n return;\n }\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n this._balloon.add({\n view: this.formView,\n position: this._getBalloonPositionData()\n });\n // Select input when form view is currently visible.\n if (this._balloon.visibleView === this.formView) {\n this.formView.urlInputView.select();\n }\n // Make sure that each time the panel shows up, the URL field remains in sync with the value of\n // the command. If the user typed in the input, then canceled the balloon (`urlInputView#value` stays\n // unaltered) and re-opened it without changing the value of the link command (e.g. because they\n // clicked the same link), they would see the old value instead of the actual value of the command.\n // https://github.com/ckeditor/ckeditor5-link/issues/78\n // https://github.com/ckeditor/ckeditor5-link/issues/123\n this.formView.urlInputView.inputView.element.value = linkCommand.value || '';\n }\n /**\n\t * Closes the form view. Decides whether the balloon should be hidden completely or if the action view should be shown. This is\n\t * decided upon the link command value (which has a value if the document selection is in the link).\n\t *\n\t * Additionally, if any {@link module:link/link~LinkConfig#decorators} are defined in the editor configuration, the state of\n\t * switch buttons responsible for manual decorator handling is restored.\n\t *\n\t * @private\n\t */\n _closeFormView() {\n const linkCommand = this.editor.commands.get('link');\n // Restore manual decorator states to represent the current model state. This case is important to reset the switch buttons\n // when the user cancels the editing form.\n linkCommand.restoreManualDecoratorStates();\n if (linkCommand.value !== undefined) {\n this._removeFormView();\n } else {\n this._hideUI();\n }\n }\n /**\n\t * Removes the {@link #formView} from the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _removeFormView() {\n if (this._isFormInPanel) {\n // Blur the input element before removing it from DOM to prevent issues in some browsers.\n // See https://github.com/ckeditor/ckeditor5/issues/1501.\n this.formView.saveButtonView.focus();\n this._balloon.remove(this.formView);\n // Because the form has an input which has focus, the focus must be brought back\n // to the editor. Otherwise, it would be lost.\n this.editor.editing.view.focus();\n }\n }\n /**\n\t * Shows the correct UI type for the current state of the command. It is either\n\t * {@link #formView} or {@link #actionsView}.\n\t *\n\t * @param {Boolean} forceVisible\n\t * @private\n\t */\n _showUI(forceVisible = false) {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n if (!linkCommand.isEnabled) {\n return;\n }\n // When there's no link under the selection, go straight to the editing UI.\n if (!this._getSelectedLinkElement()) {\n this._addActionsView();\n // Be sure panel with link is visible.\n if (forceVisible) {\n this._balloon.showStack('main');\n }\n this._addFormView();\n } // If there's a link under the selection...\n else {\n // Go to the editing UI if actions are already visible.\n if (this._areActionsVisible) {\n this._addFormView();\n } // Otherwise display just the actions UI.\n else {\n this._addActionsView();\n }\n // Be sure panel with link is visible.\n if (forceVisible) {\n this._balloon.showStack('main');\n }\n }\n // Begin responding to ui#update once the UI is added.\n this._startUpdatingUI();\n }\n /**\n\t * Removes the {@link #formView} from the {@link #_balloon}.\n\t *\n\t * See {@link #_addFormView}, {@link #_addActionsView}.\n\t *\n\t * @protected\n\t */\n _hideUI() {\n if (!this._isUIInPanel) {\n return;\n }\n const editor = this.editor;\n this.stopListening(editor.ui, 'update');\n this.stopListening(this._balloon, 'change:visibleView');\n // Make sure the focus always gets back to the editable _before_ removing the focused form view.\n // Doing otherwise causes issues in some browsers. See https://github.com/ckeditor/ckeditor5-link/issues/193.\n editor.editing.view.focus();\n // Remove form first because it's on top of the stack.\n this._removeFormView();\n // Then remove the actions view because it's beneath the form.\n this._balloon.remove(this.actionsView);\n }\n /**\n\t * Makes the UI react to the {@link module:core/editor/editorui~EditorUI#event:update} event to\n\t * reposition itself when the editor UI should be refreshed.\n\t *\n\t * See: {@link #_hideUI} to learn when the UI stops reacting to the `update` event.\n\t *\n\t * @protected\n\t */\n _startUpdatingUI() {\n const editor = this.editor;\n const viewDocument = editor.editing.view.document;\n let prevSelectedLink = this._getSelectedLinkElement();\n let prevSelectionParent = getSelectionParent();\n const update = () => {\n const selectedLink = this._getSelectedLinkElement();\n const selectionParent = getSelectionParent();\n // Hide the panel if:\n //\n // * the selection went out of the EXISTING link element. E.g. user moved the caret out\n // of the link,\n // * the selection went to a different parent when creating a NEW link. E.g. someone\n // else modified the document.\n // * the selection has expanded (e.g. displaying link actions then pressing SHIFT+Right arrow).\n //\n // Note: #_getSelectedLinkElement will return a link for a non-collapsed selection only\n // when fully selected.\n if (prevSelectedLink && !selectedLink || !prevSelectedLink && selectionParent !== prevSelectionParent) {\n this._hideUI();\n } // Update the position of the panel when:\n // * link panel is in the visible stack\n // * the selection remains in the original link element,\n // * there was no link element in the first place, i.e. creating a new link\n else if (this._isUIVisible) {\n // If still in a link element, simply update the position of the balloon.\n // If there was no link (e.g. inserting one), the balloon must be moved\n // to the new position in the editing view (a new native DOM range).\n this._balloon.updatePosition(this._getBalloonPositionData());\n }\n prevSelectedLink = selectedLink;\n prevSelectionParent = selectionParent;\n };\n function getSelectionParent() {\n return viewDocument.selection.focus.getAncestors().reverse().find(node => node.is('element'));\n }\n this.listenTo(editor.ui, 'update', update);\n this.listenTo(this._balloon, 'change:visibleView', update);\n }\n /**\n\t * Returns `true` when {@link #formView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isFormInPanel() {\n return this._balloon.hasView(this.formView);\n }\n /**\n\t * Returns `true` when {@link #actionsView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _areActionsInPanel() {\n return this._balloon.hasView(this.actionsView);\n }\n /**\n\t * Returns `true` when {@link #actionsView} is in the {@link #_balloon} and it is\n\t * currently visible.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _areActionsVisible() {\n return this._balloon.visibleView === this.actionsView;\n }\n /**\n\t * Returns `true` when {@link #actionsView} or {@link #formView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isUIInPanel() {\n return this._isFormInPanel || this._areActionsInPanel;\n }\n /**\n\t * Returns `true` when {@link #actionsView} or {@link #formView} is in the {@link #_balloon} and it is\n\t * currently visible.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isUIVisible() {\n const visibleView = this._balloon.visibleView;\n return visibleView == this.formView || this._areActionsVisible;\n }\n /**\n\t * Returns positioning options for the {@link #_balloon}. They control the way the balloon is attached\n\t * to the target element or selection.\n\t *\n\t * If the selection is collapsed and inside a link element, the panel will be attached to the\n\t * entire link element. Otherwise, it will be attached to the selection.\n\t *\n\t * @private\n\t * @returns {module:utils/dom/position~Options}\n\t */\n _getBalloonPositionData() {\n const view = this.editor.editing.view;\n const viewDocument = view.document;\n const targetLink = this._getSelectedLinkElement();\n const target = targetLink ? // When selection is inside link element, then attach panel to this element.\n view.domConverter.mapViewToDom(targetLink) : // Otherwise attach panel to the selection.\n view.domConverter.viewRangeToDom(viewDocument.selection.getFirstRange());\n return { target };\n }\n /**\n\t * Returns the link {@link module:engine/view/attributeelement~AttributeElement} under\n\t * the {@link module:engine/view/document~Document editing view's} selection or `null`\n\t * if there is none.\n\t *\n\t * **Note**: For a non–collapsed selection, the link element is only returned when **fully**\n\t * selected and the **only** element within the selection boundaries.\n\t *\n\t * @private\n\t * @returns {module:engine/view/attributeelement~AttributeElement|null}\n\t */\n _getSelectedLinkElement() {\n const view = this.editor.editing.view;\n const selection = view.document.selection;\n if (selection.isCollapsed) {\n return findLinkElementAncestor(selection.getFirstPosition());\n } else {\n // The range for fully selected link is usually anchored in adjacent text nodes.\n // Trim it to get closer to the actual link element.\n const range = selection.getFirstRange().getTrimmed();\n const startLink = findLinkElementAncestor(range.start);\n const endLink = findLinkElementAncestor(range.end);\n if (!startLink || startLink != endLink) {\n return null;\n }\n // Check if the link element is fully selected.\n if (view.createRangeIn(startLink).getTrimmed().isEqual(range)) {\n return startLink;\n } else {\n return null;\n }\n }\n }\n}\n// Returns a link element if there's one among the ancestors of the provided `Position`.\n//\n// @private\n// @param {module:engine/view/position~Position} View position to analyze.\n// @returns {module:engine/view/attributeelement~AttributeElement|null} Link element at the position or null.\nfunction findLinkElementAncestor(position) {\n return position.getAncestors().find(ancestor => isLinkElement(ancestor));\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/listcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The list command. It is used by the {@link module:list/list~List list feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class ListCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {'numbered'|'bulleted'} type List type that will be handled by this command.\n\t */\n\tconstructor( editor, type ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The type of the list created by the command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'numbered'|'bulleted'|'todo'}\n\t\t */\n\t\tthis.type = type;\n\n\t\t/**\n\t\t * A flag indicating whether the command is active, which means that the selection starts in a list of the same type.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.value = this._getValue();\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @protected\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst blocks = Array.from( document.selection.getSelectedBlocks() )\n\t\t\t.filter( block => checkCanBecomeListItem( block, model.schema ) );\n\n\t\t// Whether we are turning off some items.\n\t\tconst turnOff = this.value === true;\n\t\t// If we are turning off items, we are going to rename them to paragraphs.\n\n\t\tmodel.change( writer => {\n\t\t\t// If part of a list got turned off, we need to handle (outdent) all of sub-items of the last turned-off item.\n\t\t\t// To be sure that model is all the time in a good state, we first fix items below turned-off item.\n\t\t\tif ( turnOff ) {\n\t\t\t\t// Start from the model item that is just after the last turned-off item.\n\t\t\t\tlet next = blocks[ blocks.length - 1 ].nextSibling;\n\t\t\t\tlet currentIndent = Number.POSITIVE_INFINITY;\n\t\t\t\tlet changes = [];\n\n\t\t\t\t// Correct indent of all items after the last turned off item.\n\t\t\t\t// Rules that should be followed:\n\t\t\t\t// 1. All direct sub-items of turned-off item should become indent 0, because the first item after it\n\t\t\t\t// will be the first item of a new list. Other items are at the same level, so should have same 0 index.\n\t\t\t\t// 2. All items with indent lower than indent of turned-off item should become indent 0, because they\n\t\t\t\t// should not end up as a child of any of list items that they were not children of before.\n\t\t\t\t// 3. All other items should have their indent changed relatively to it's parent.\n\t\t\t\t//\n\t\t\t\t// For example:\n\t\t\t\t// 1 * --------\n\t\t\t\t// 2 * --------\n\t\t\t\t// 3 * --------\t\t\t<-- this is turned off.\n\t\t\t\t// 4 * --------\t\t<-- this has to become indent = 0, because it will be first item on a new list.\n\t\t\t\t// 5 * --------\t<-- this should be still be a child of item above, so indent = 1.\n\t\t\t\t// 6 * --------\t\t\t<-- this has to become indent = 0, because it should not be a child of any of items above.\n\t\t\t\t// 7 * --------\t\t<-- this should be still be a child of item above, so indent = 1.\n\t\t\t\t// 8 * --------\t\t\t\t<-- this has to become indent = 0.\n\t\t\t\t// 9 * --------\t\t\t<-- this should still be a child of item above, so indent = 1.\n\t\t\t\t// 10 * --------\t\t<-- this should still be a child of item above, so indent = 2.\n\t\t\t\t// 11 * --------\t\t<-- this should still be at the same level as item above, so indent = 2.\n\t\t\t\t// 12 * --------\t\t\t\t<-- this and all below are left unchanged.\n\t\t\t\t// 13 * --------\n\t\t\t\t// 14 * --------\n\t\t\t\t//\n\t\t\t\t// After turning off 3 the list becomes:\n\t\t\t\t//\n\t\t\t\t// 1 * --------\n\t\t\t\t// 2 * --------\n\t\t\t\t//\n\t\t\t\t// 3 --------\n\t\t\t\t//\n\t\t\t\t// 4 * --------\n\t\t\t\t// 5 * --------\n\t\t\t\t// 6 * --------\n\t\t\t\t// 7 * --------\n\t\t\t\t// 8 * --------\n\t\t\t\t// 9 * --------\n\t\t\t\t// 10 * --------\n\t\t\t\t// 11 * --------\n\t\t\t\t// 12 * --------\n\t\t\t\t// 13 * --------\n\t\t\t\t// 14 * --------\n\t\t\t\t//\n\t\t\t\t// Thanks to this algorithm no lists are mismatched and no items get unexpected children/parent, while\n\t\t\t\t// those parent-child connection which are possible to maintain are still maintained. It's worth noting\n\t\t\t\t// that this is the same effect that we would be get by multiple use of outdent command. However doing\n\t\t\t\t// it like this is much more efficient because it's less operation (less memory usage, easier OT) and\n\t\t\t\t// less conversion (faster).\n\t\t\t\twhile ( next && next.name == 'listItem' && next.getAttribute( 'listIndent' ) !== 0 ) {\n\t\t\t\t\t// Check each next list item, as long as its indent is bigger than 0.\n\t\t\t\t\t// If the indent is 0 we are not going to change anything anyway.\n\t\t\t\t\tconst indent = next.getAttribute( 'listIndent' );\n\n\t\t\t\t\t// We check if that's item indent is lower as current relative indent.\n\t\t\t\t\tif ( indent < currentIndent ) {\n\t\t\t\t\t\t// If it is, current relative indent becomes that indent.\n\t\t\t\t\t\tcurrentIndent = indent;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Fix indent relatively to current relative indent.\n\t\t\t\t\t// Note, that if we just changed the current relative indent, the newIndent will be equal to 0.\n\t\t\t\t\tconst newIndent = indent - currentIndent;\n\n\t\t\t\t\t// Save the entry in changes array. We do not apply it at the moment, because we will need to\n\t\t\t\t\t// reverse the changes so the last item is changed first.\n\t\t\t\t\t// This is to keep model in correct state all the time.\n\t\t\t\t\tchanges.push( { element: next, listIndent: newIndent } );\n\n\t\t\t\t\t// Find next item.\n\t\t\t\t\tnext = next.nextSibling;\n\t\t\t\t}\n\n\t\t\t\tchanges = changes.reverse();\n\n\t\t\t\tfor ( const item of changes ) {\n\t\t\t\t\twriter.setAttribute( 'listIndent', item.listIndent, item.element );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we are turning on, we might change some items that are already `listItem`s but with different type.\n\t\t\t// Changing one nested list item to other type should also trigger changing all its siblings so the\n\t\t\t// whole nested list is of the same type.\n\t\t\t// Example (assume changing to numbered list):\n\t\t\t// * ------\t\t\t\t<-- do not fix, top level item\n\t\t\t// * ------\t\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ------\t\t<-- do not fix, item is not affected (different list)\n\t\t\t// * ------\t\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ------\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ---[--\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t\t<-- already in selection, but does not cause other list items to change because is top-level\n\t\t\t// * ---]--\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- fix, because preceding list item of this item's list is changed\n\t\t\t// * ------\t\t<-- do not fix, item is not affected (different list)\n\t\t\t// * ------\t\t\t\t<-- do not fix, top level item\n\t\t\tif ( !turnOff ) {\n\t\t\t\t// Find lowest indent among selected items. This will be indicator what is the indent of\n\t\t\t\t// top-most list affected by the command.\n\t\t\t\tlet lowestIndent = Number.POSITIVE_INFINITY;\n\n\t\t\t\tfor ( const item of blocks ) {\n\t\t\t\t\tif ( item.is( 'listItem' ) && item.getAttribute( 'listIndent' ) < lowestIndent ) {\n\t\t\t\t\t\tlowestIndent = item.getAttribute( 'listIndent' );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Do not execute the fix for top-level lists.\n\t\t\t\tlowestIndent = lowestIndent === 0 ? 1 : lowestIndent;\n\n\t\t\t\t// Fix types of list items that are \"before\" the selected blocks.\n\t\t\t\t_fixType( blocks, true, lowestIndent );\n\n\t\t\t\t// Fix types of list items that are \"after\" the selected blocks.\n\t\t\t\t_fixType( blocks, false, lowestIndent );\n\t\t\t}\n\n\t\t\t// Phew! Now it will be easier :).\n\t\t\t// For each block element that was in the selection, we will either: turn it to list item,\n\t\t\t// turn it to paragraph, or change it's type. Or leave it as it is.\n\t\t\t// Do it in reverse as there might be multiple blocks (same as with changing indents).\n\t\t\tfor ( const element of blocks.reverse() ) {\n\t\t\t\tif ( turnOff && element.name == 'listItem' ) {\n\t\t\t\t\t// We are turning off and the element is a `listItem` - it should be converted to `paragraph`.\n\t\t\t\t\t// List item specific attributes are removed by post fixer.\n\t\t\t\t\twriter.rename( element, 'paragraph' );\n\t\t\t\t} else if ( !turnOff && element.name != 'listItem' ) {\n\t\t\t\t\t// We are turning on and the element is not a `listItem` - it should be converted to `listItem`.\n\t\t\t\t\t// The order of operations is important to keep model in correct state.\n\t\t\t\t\twriter.setAttributes( { listType: this.type, listIndent: 0 }, element );\n\t\t\t\t\twriter.rename( element, 'listItem' );\n\t\t\t\t} else if ( !turnOff && element.name == 'listItem' && element.getAttribute( 'listType' ) != this.type ) {\n\t\t\t\t\t// We are turning on and the element is a `listItem` but has different type - change it's type and\n\t\t\t\t\t// type of it's all siblings that have same indent.\n\t\t\t\t\twriter.setAttribute( 'listType', this.type, element );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the command's {@link #value}.\n\t *\n\t * @private\n\t * @returns {Boolean} The current value.\n\t */\n\t_getValue() {\n\t\t// Check whether closest `listItem` ancestor of the position has a correct type.\n\t\tconst listItem = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\treturn !!listItem && listItem.is( 'listItem' ) && listItem.getAttribute( 'listType' ) == this.type;\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\t// If command value is true it means that we are in list item, so the command should be enabled.\n\t\tif ( this.value ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tconst selection = this.editor.model.document.selection;\n\t\tconst schema = this.editor.model.schema;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\tif ( !firstBlock ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Otherwise, check if list item can be inserted at the position start.\n\t\treturn checkCanBecomeListItem( firstBlock, schema );\n\t}\n}\n\n// Helper function used when one or more list item have their type changed. Fixes type of other list items\n// that are affected by the change (are in same lists) but are not directly in selection. The function got extracted\n// not to duplicated code, as same fix has to be performed before and after selection.\n//\n// @param {Array.<module:engine/model/node~Node>} blocks Blocks that are in selection.\n// @param {Boolean} isBackward Specified whether fix will be applied for blocks before first selected block (`true`)\n// or blocks after last selected block (`false`).\n// @param {Number} lowestIndent Lowest indent among selected blocks.\nfunction _fixType( blocks, isBackward, lowestIndent ) {\n\t// We need to check previous sibling of first changed item and next siblings of last changed item.\n\tconst startingItem = isBackward ? blocks[ 0 ] : blocks[ blocks.length - 1 ];\n\n\tif ( startingItem.is( 'listItem' ) ) {\n\t\tlet item = startingItem[ isBackward ? 'previousSibling' : 'nextSibling' ];\n\t\t// During processing items, keeps the lowest indent of already processed items.\n\t\t// This saves us from changing too many items.\n\t\t// Following example is for going forward as it is easier to read, however same applies to going backward.\n\t\t// * ------\n\t\t// * ------\n\t\t// * --[---\n\t\t// * ------\t\t<-- `lowestIndent` should be 1\n\t\t// * --]---\t\t<-- `startingItem`, `currentIndent` = 2, `lowestIndent` == 1\n\t\t// * ------\t\t<-- should be fixed, `indent` == 2 == `currentIndent`\n\t\t// * ------\t\t<-- should be fixed, set `currentIndent` to 1, `indent` == 1 == `currentIndent`\n\t\t// * ------\t\t<-- should not be fixed, item is in different list, `indent` = 2, `indent` != `currentIndent`\n\t\t// * ------\t\t<-- should be fixed, `indent` == 1 == `currentIndent`\n\t\t// * ------\t\t\t<-- break loop (`indent` < `lowestIndent`)\n\t\tlet currentIndent = startingItem.getAttribute( 'listIndent' );\n\n\t\t// Look back until a list item with indent lower than reference `lowestIndent`.\n\t\t// That would be the parent of nested sublist which contains item having `lowestIndent`.\n\t\twhile ( item && item.is( 'listItem' ) && item.getAttribute( 'listIndent' ) >= lowestIndent ) {\n\t\t\tif ( currentIndent > item.getAttribute( 'listIndent' ) ) {\n\t\t\t\tcurrentIndent = item.getAttribute( 'listIndent' );\n\t\t\t}\n\n\t\t\t// Found an item that is in the same nested sublist.\n\t\t\tif ( item.getAttribute( 'listIndent' ) == currentIndent ) {\n\t\t\t\t// Just add the item to selected blocks like it was selected by the user.\n\t\t\t\tblocks[ isBackward ? 'unshift' : 'push' ]( item );\n\t\t\t}\n\n\t\t\titem = item[ isBackward ? 'previousSibling' : 'nextSibling' ];\n\t\t}\n\t}\n}\n\n// Checks whether the given block can be replaced by a listItem.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeListItem( block, schema ) {\n\treturn schema.checkChild( block.parent, 'listItem' ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/indentcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The list indent command. It is used by the {@link module:list/list~List list feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class IndentCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {'forward'|'backward'} indentDirection The direction of indent. If it is equal to `backward`, the command\n\t * will outdent a list item.\n\t */\n\tconstructor( editor, indentDirection ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Determines by how much the command will change the list item's indent attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Number}\n\t\t */\n\t\tthis._indentBy = indentDirection == 'forward' ? 1 : -1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Indents or outdents (depending on the {@link #constructor}'s `indentDirection` parameter) selected list items.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tlet itemsToChange = Array.from( doc.selection.getSelectedBlocks() );\n\n\t\tmodel.change( writer => {\n\t\t\tconst lastItem = itemsToChange[ itemsToChange.length - 1 ];\n\n\t\t\t// Indenting a list item should also indent all the items that are already sub-items of indented item.\n\t\t\tlet next = lastItem.nextSibling;\n\n\t\t\t// Check all items after last indented item, as long as their indent is bigger than indent of that item.\n\t\t\twhile ( next && next.name == 'listItem' && next.getAttribute( 'listIndent' ) > lastItem.getAttribute( 'listIndent' ) ) {\n\t\t\t\titemsToChange.push( next );\n\n\t\t\t\tnext = next.nextSibling;\n\t\t\t}\n\n\t\t\t// We need to be sure to keep model in correct state after each small change, because converters\n\t\t\t// bases on that state and assumes that model is correct.\n\t\t\t// Because of that, if the command outdents items, we will outdent them starting from the last item, as\n\t\t\t// it is safer.\n\t\t\tif ( this._indentBy < 0 ) {\n\t\t\t\titemsToChange = itemsToChange.reverse();\n\t\t\t}\n\n\t\t\tfor ( const item of itemsToChange ) {\n\t\t\t\tconst indent = item.getAttribute( 'listIndent' ) + this._indentBy;\n\n\t\t\t\t// If indent is lower than 0, it means that the item got outdented when it was not indented.\n\t\t\t\t// This means that we need to convert that list item to paragraph.\n\t\t\t\tif ( indent < 0 ) {\n\t\t\t\t\t// To keep the model as correct as possible, first rename listItem, then remove attributes,\n\t\t\t\t\t// as listItem without attributes is very incorrect and will cause problems in converters.\n\t\t\t\t\t// No need to remove attributes, will be removed by post fixer.\n\t\t\t\t\twriter.rename( item, 'paragraph' );\n\t\t\t\t}\n\t\t\t\t// If indent is >= 0, change the attribute value.\n\t\t\t\telse {\n\t\t\t\t\twriter.setAttribute( 'listIndent', indent, item );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\t// Check whether any of position's ancestor is a list item.\n\t\tconst listItem = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\t// If selection is not in a list item, the command is disabled.\n\t\tif ( !listItem || !listItem.is( 'listItem' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this._indentBy > 0 ) {\n\t\t\t// Cannot indent first item in it's list. Check if before `listItem` is a list item that is in same list.\n\t\t\t// To be in the same list, the item has to have same attributes and cannot be \"split\" by an item with lower indent.\n\t\t\tconst indent = listItem.getAttribute( 'listIndent' );\n\t\t\tconst type = listItem.getAttribute( 'listType' );\n\n\t\t\tlet prev = listItem.previousSibling;\n\n\t\t\twhile ( prev && prev.is( 'listItem' ) && prev.getAttribute( 'listIndent' ) >= indent ) {\n\t\t\t\tif ( prev.getAttribute( 'listIndent' ) == indent ) {\n\t\t\t\t\t// The item is on the same level.\n\t\t\t\t\t// If it has same type, it means that we found a preceding sibling from the same list.\n\t\t\t\t\t// If it does not have same type, it means that `listItem` is on different list (this can happen only\n\t\t\t\t\t// on top level lists, though).\n\t\t\t\t\treturn prev.getAttribute( 'listType' ) == type;\n\t\t\t\t}\n\n\t\t\t\tprev = prev.previousSibling;\n\t\t\t}\n\n\t\t\t// Could not find similar list item, this means that `listItem` is first in its list.\n\t\t\treturn false;\n\t\t}\n\n\t\t// If we are outdenting it is enough to be in list item. Every list item can always be outdented.\n\t\treturn true;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/utils\n */\n\nimport { getFillerOffset } from '@ckeditor/ckeditor5-engine/src/view/containerelement';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\n\n/**\n * Creates a list item {@link module:engine/view/containerelement~ContainerElement}.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer The writer instance.\n * @returns {module:engine/view/containerelement~ContainerElement}\n */\nexport function createViewListItemElement( writer ) {\n\tconst viewItem = writer.createContainerElement( 'li' );\n\n\tviewItem.getFillerOffset = getListItemFillerOffset;\n\n\treturn viewItem;\n}\n\n/**\n * Helper function that creates a `<ul><li></li></ul>` or (`<ol>`) structure out of the given `modelItem` model `listItem` element.\n * Then, it binds the created view list item (<li>) with the model `listItem` element.\n * The function then returns the created view list item (<li>).\n *\n * @param {module:engine/model/item~Item} modelItem Model list item.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface.\n * @returns {module:engine/view/containerelement~ContainerElement} View list element.\n */\nexport function generateLiInUl( modelItem, conversionApi ) {\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\tconst listType = modelItem.getAttribute( 'listType' ) == 'numbered' ? 'ol' : 'ul';\n\tconst viewItem = createViewListItemElement( viewWriter );\n\n\tconst viewList = viewWriter.createContainerElement( listType, null );\n\n\tviewWriter.insert( viewWriter.createPositionAt( viewList, 0 ), viewItem );\n\n\tmapper.bindElements( modelItem, viewItem );\n\n\treturn viewItem;\n}\n\n/**\n * Helper function that inserts a view list at a correct place and merges it with its siblings.\n * It takes a model list item element (`modelItem`) and a corresponding view list item element (`injectedItem`). The view list item\n * should be in a view list element (`<ul>` or `<ol>`) and should be its only child.\n * See comments below to better understand the algorithm.\n *\n * @param {module:engine/view/item~Item} modelItem Model list item.\n * @param {module:engine/view/containerelement~ContainerElement} injectedItem\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface.\n * @param {module:engine/model/model~Model} model The model instance.\n */\nexport function injectViewList( modelItem, injectedItem, conversionApi, model ) {\n\tconst injectedList = injectedItem.parent;\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\n\t// The position where the view list will be inserted.\n\tlet insertPosition = mapper.toViewPosition( model.createPositionBefore( modelItem ) );\n\n\t// 1. Find the previous list item that has the same or smaller indent. Basically we are looking for the first model item\n\t// that is a \"parent\" or \"sibling\" of the injected model item.\n\t// If there is no such list item, it means that the injected list item is the first item in \"its list\".\n\tconst refItem = getSiblingListItem( modelItem.previousSibling, {\n\t\tsameIndent: true,\n\t\tsmallerIndent: true,\n\t\tlistIndent: modelItem.getAttribute( 'listIndent' )\n\t} );\n\tconst prevItem = modelItem.previousSibling;\n\n\tif ( refItem && refItem.getAttribute( 'listIndent' ) == modelItem.getAttribute( 'listIndent' ) ) {\n\t\t// There is a list item with the same indent - we found the same-level sibling.\n\t\t// Break the list after it. The inserted view item will be added in the broken space.\n\t\tconst viewItem = mapper.toViewElement( refItem );\n\t\tinsertPosition = viewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\t} else {\n\t\t// There is no list item with the same indent. Check the previous model item.\n\t\tif ( prevItem && prevItem.name == 'listItem' ) {\n\t\t\t// If it is a list item, it has to have a lower indent.\n\t\t\t// It means that the inserted item should be added to it as its nested item.\n\t\t\tinsertPosition = mapper.toViewPosition( model.createPositionAt( prevItem, 'end' ) );\n\t\t} else {\n\t\t\t// The previous item is not a list item (or does not exist at all).\n\t\t\t// Just map the position and insert the view item at the mapped position.\n\t\t\tinsertPosition = mapper.toViewPosition( model.createPositionBefore( modelItem ) );\n\t\t}\n\t}\n\n\tinsertPosition = positionAfterUiElements( insertPosition );\n\n\t// Insert the view item.\n\tviewWriter.insert( insertPosition, injectedList );\n\n\t// 2. Handle possible children of the injected model item.\n\tif ( prevItem && prevItem.name == 'listItem' ) {\n\t\tconst prevView = mapper.toViewElement( prevItem );\n\n\t\tconst walkerBoundaries = viewWriter.createRange( viewWriter.createPositionAt( prevView, 0 ), insertPosition );\n\t\tconst walker = walkerBoundaries.getWalker( { ignoreElementEnd: true } );\n\n\t\tfor ( const value of walker ) {\n\t\t\tif ( value.item.is( 'li' ) ) {\n\t\t\t\tconst breakPosition = viewWriter.breakContainer( viewWriter.createPositionBefore( value.item ) );\n\t\t\t\tconst viewList = value.item.parent;\n\n\t\t\t\tconst targetPosition = viewWriter.createPositionAt( injectedItem, 'end' );\n\t\t\t\tmergeViewLists( viewWriter, targetPosition.nodeBefore, targetPosition.nodeAfter );\n\t\t\t\tviewWriter.move( viewWriter.createRangeOn( viewList ), targetPosition );\n\n\t\t\t\twalker.position = breakPosition;\n\t\t\t}\n\t\t}\n\t} else {\n\t\tconst nextViewList = injectedList.nextSibling;\n\n\t\tif ( nextViewList && ( nextViewList.is( 'ul' ) || nextViewList.is( 'ol' ) ) ) {\n\t\t\tlet lastSubChild = null;\n\n\t\t\tfor ( const child of nextViewList.getChildren() ) {\n\t\t\t\tconst modelChild = mapper.toModelElement( child );\n\n\t\t\t\tif ( modelChild && modelChild.getAttribute( 'listIndent' ) > modelItem.getAttribute( 'listIndent' ) ) {\n\t\t\t\t\tlastSubChild = child;\n\t\t\t\t} else {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( lastSubChild ) {\n\t\t\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( lastSubChild ) );\n\t\t\t\tviewWriter.move( viewWriter.createRangeOn( lastSubChild.parent ), viewWriter.createPositionAt( injectedItem, 'end' ) );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Merge the inserted view list with its possible neighbor lists.\n\tmergeViewLists( viewWriter, injectedList, injectedList.nextSibling );\n\tmergeViewLists( viewWriter, injectedList.previousSibling, injectedList );\n}\n\n/**\n * Helper function that takes two parameters that are expected to be view list elements, and merges them.\n * The merge happens only if both parameters are list elements of the same type (the same element name and the same class attributes).\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter The writer instance.\n * @param {module:engine/view/item~Item} firstList The first element to compare.\n * @param {module:engine/view/item~Item} secondList The second element to compare.\n * @returns {module:engine/view/position~Position|null} The position after merge or `null` when there was no merge.\n */\nexport function mergeViewLists( viewWriter, firstList, secondList ) {\n\t// Check if two lists are going to be merged.\n\tif ( !firstList || !secondList || ( firstList.name != 'ul' && firstList.name != 'ol' ) ) {\n\t\treturn null;\n\t}\n\n\t// Both parameters are list elements, so compare types now.\n\tif ( firstList.name != secondList.name || firstList.getAttribute( 'class' ) !== secondList.getAttribute( 'class' ) ) {\n\t\treturn null;\n\t}\n\n\treturn viewWriter.mergeContainers( viewWriter.createPositionAfter( firstList ) );\n}\n\n/**\n * Helper function that for a given `view.Position`, returns a `view.Position` that is after all `view.UIElement`s that\n * are after the given position.\n *\n * For example:\n * `<container:p>foo^<ui:span></ui:span><ui:span></ui:span>bar</container:p>`\n * For position ^, the position before \"bar\" will be returned.\n *\n * @param {module:engine/view/position~Position} viewPosition\n * @returns {module:engine/view/position~Position}\n */\nexport function positionAfterUiElements( viewPosition ) {\n\treturn viewPosition.getLastMatchingPosition( value => value.item.is( 'uiElement' ) );\n}\n\n/**\n * Helper function that searches for a previous list item sibling of a given model item that meets the given criteria\n * passed by the options object.\n *\n * @param {module:engine/model/item~Item} modelItem\n * @param {Object} options Search criteria.\n * @param {Boolean} [options.sameIndent=false] Whether the sought sibling should have the same indentation.\n * @param {Boolean} [options.smallerIndent=false] Whether the sought sibling should have a smaller indentation.\n * @param {Number} [options.listIndent] The reference indentation.\n * @returns {module:engine/model/item~Item|null}\n */\nexport function getSiblingListItem( modelItem, options ) {\n\tconst sameIndent = !!options.sameIndent;\n\tconst smallerIndent = !!options.smallerIndent;\n\tconst indent = options.listIndent;\n\n\tlet item = modelItem;\n\n\twhile ( item && item.name == 'listItem' ) {\n\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\tif ( ( sameIndent && indent == itemIndent ) || ( smallerIndent && indent > itemIndent ) ) {\n\t\t\treturn item;\n\t\t}\n\n\t\titem = item.previousSibling;\n\t}\n\n\treturn null;\n}\n\n/**\n * Helper method for creating a UI button and linking it with an appropriate command.\n *\n * @private\n * @param {module:core/editor/editor~Editor} editor The editor instance to which the UI component will be added.\n * @param {String} commandName The name of the command.\n * @param {Object} label The button label.\n * @param {String} icon The source of the icon.\n */\nexport function createUIComponent( editor, commandName, label, icon ) {\n\teditor.ui.componentFactory.add( commandName, locale => {\n\t\tconst command = editor.commands.get( commandName );\n\t\tconst buttonView = new ButtonView( locale );\n\n\t\tbuttonView.set( {\n\t\t\tlabel,\n\t\t\ticon,\n\t\t\ttooltip: true,\n\t\t\tisToggleable: true\n\t\t} );\n\n\t\t// Bind button model to command.\n\t\tbuttonView.bind( 'isOn', 'isEnabled' ).to( command, 'value', 'isEnabled' );\n\n\t\t// Execute command.\n\t\tbuttonView.on( 'execute', () => editor.execute( commandName ) );\n\n\t\treturn buttonView;\n\t} );\n}\n\n// Implementation of getFillerOffset for view list item element.\n//\n// @returns {Number|null} Block filler offset or `null` if block filler is not needed.\nfunction getListItemFillerOffset() {\n\tconst hasOnlyLists = !this.isEmpty && ( this.getChild( 0 ).name == 'ul' || this.getChild( 0 ).name == 'ol' );\n\n\tif ( this.isEmpty || hasOnlyLists ) {\n\t\treturn 0;\n\t}\n\n\treturn getFillerOffset.call( this );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/converters\n */\n\nimport {\n\tgenerateLiInUl,\n\tinjectViewList,\n\tmergeViewLists,\n\tgetSiblingListItem,\n\tpositionAfterUiElements\n} from './utils';\nimport TreeWalker from '@ckeditor/ckeditor5-engine/src/model/treewalker';\n\n/**\n * A model-to-view converter for the `listItem` model element insertion.\n *\n * It creates a `<ul><li></li><ul>` (or `<ol>`) view structure out of a `listItem` model element, inserts it at the correct\n * position, and merges the list with surrounding lists (if available).\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewInsertion( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst consumable = conversionApi.consumable;\n\n\t\tif ( !consumable.test( data.item, 'insert' ) ||\n\t\t\t!consumable.test( data.item, 'attribute:listType' ) ||\n\t\t\t!consumable.test( data.item, 'attribute:listIndent' )\n\t\t) {\n\t\t\treturn;\n\t\t}\n\n\t\tconsumable.consume( data.item, 'insert' );\n\t\tconsumable.consume( data.item, 'attribute:listType' );\n\t\tconsumable.consume( data.item, 'attribute:listIndent' );\n\n\t\tconst modelItem = data.item;\n\t\tconst viewItem = generateLiInUl( modelItem, conversionApi );\n\n\t\tinjectViewList( modelItem, viewItem, conversionApi, model );\n\t};\n}\n\n/**\n * A model-to-view converter for the `listItem` model element removal.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewRemove( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewStart = conversionApi.mapper.toViewPosition( data.position ).getLastMatchingPosition( value => !value.item.is( 'li' ) );\n\t\tconst viewItem = viewStart.nodeAfter;\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// 1. Break the container after and before the list item.\n\t\t// This will create a view list with one view list item - the one to remove.\n\t\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t\t// 2. Remove the list with the item to remove.\n\t\tconst viewList = viewItem.parent;\n\t\tconst viewListPrev = viewList.previousSibling;\n\t\tconst removeRange = viewWriter.createRangeOn( viewList );\n\t\tconst removed = viewWriter.remove( removeRange );\n\n\t\t// 3. Merge the whole created by breaking and removing the list.\n\t\tif ( viewListPrev && viewListPrev.nextSibling ) {\n\t\t\tmergeViewLists( viewWriter, viewListPrev, viewListPrev.nextSibling );\n\t\t}\n\n\t\t// 4. Bring back nested list that was in the removed <li>.\n\t\tconst modelItem = conversionApi.mapper.toModelElement( viewItem );\n\n\t\thoistNestedLists( modelItem.getAttribute( 'listIndent' ) + 1, data.position, removeRange.start, viewItem, conversionApi, model );\n\n\t\t// 5. Unbind removed view item and all children.\n\t\tfor ( const child of viewWriter.createRangeIn( removed ).getItems() ) {\n\t\t\tconversionApi.mapper.unbindViewElement( child );\n\t\t}\n\n\t\tevt.stop();\n\t};\n}\n\n/**\n * A model-to-view converter for the `type` attribute change on the `listItem` model element.\n *\n * This change means that the `<li>` element parent changes from `<ul>` to `<ol>` (or vice versa). This is accomplished\n * by breaking view elements and changing their name. The next {@link module:list/converters~modelViewMergeAfterChangeType}\n * converter will attempt to merge split nodes.\n *\n * Splitting this conversion into 2 steps makes it possible to add an additional conversion in the middle.\n * Check {@link module:list/todolistconverters~modelViewChangeType} to see an example of it.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewChangeType( evt, data, conversionApi ) {\n\tif ( !conversionApi.consumable.consume( data.item, 'attribute:listType' ) ) {\n\t\treturn;\n\t}\n\n\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\tconst viewWriter = conversionApi.writer;\n\n\t// Break the container after and before the list item.\n\t// This will create a view list with one view list item -- the one that changed type.\n\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t// Change name of the view list that holds the changed view item.\n\t// We cannot just change name property, because that would not render properly.\n\tconst viewList = viewItem.parent;\n\tconst listName = data.attributeNewValue == 'numbered' ? 'ol' : 'ul';\n\n\tviewWriter.rename( listName, viewList );\n}\n\n/**\n * A model-to-view converter that attempts to merge nodes split by {@link module:list/converters~modelViewChangeType}.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewMergeAfterChangeType( evt, data, conversionApi ) {\n\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\tconst viewList = viewItem.parent;\n\tconst viewWriter = conversionApi.writer;\n\n\t// Merge the changed view list with other lists, if possible.\n\tmergeViewLists( viewWriter, viewList, viewList.nextSibling );\n\tmergeViewLists( viewWriter, viewList.previousSibling, viewList );\n\n\t// Consumable insertion of children inside the item. They are already handled by re-building the item in view.\n\tfor ( const child of data.item.getChildren() ) {\n\t\tconversionApi.consumable.consume( child, 'insert' );\n\t}\n}\n\n/**\n * A model-to-view converter for the `listIndent` attribute change on the `listItem` model element.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewChangeIndent( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, 'attribute:listIndent' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// 1. Break the container after and before the list item.\n\t\t// This will create a view list with one view list item -- the one that changed type.\n\t\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t\t// 2. Extract view list with changed view list item and merge \"hole\" possibly created by breaking and removing elements.\n\t\tconst viewList = viewItem.parent;\n\t\tconst viewListPrev = viewList.previousSibling;\n\t\tconst removeRange = viewWriter.createRangeOn( viewList );\n\t\tviewWriter.remove( removeRange );\n\n\t\tif ( viewListPrev && viewListPrev.nextSibling ) {\n\t\t\tmergeViewLists( viewWriter, viewListPrev, viewListPrev.nextSibling );\n\t\t}\n\n\t\t// 3. Bring back nested list that was in the removed <li>.\n\t\thoistNestedLists( data.attributeOldValue + 1, data.range.start, removeRange.start, viewItem, conversionApi, model );\n\n\t\t// 4. Inject view list like it is newly inserted.\n\t\tinjectViewList( data.item, viewItem, conversionApi, model );\n\n\t\t// 5. Consume insertion of children inside the item. They are already handled by re-building the item in view.\n\t\tfor ( const child of data.item.getChildren() ) {\n\t\t\tconversionApi.consumable.consume( child, 'insert' );\n\t\t}\n\t};\n}\n\n/**\n * A special model-to-view converter introduced by the {@link module:list/list~List list feature}. This converter is fired for\n * insert change of every model item, and should be fired before the actual converter. The converter checks whether the inserted\n * model item is a non-`listItem` element. If it is, and it is inserted inside a view list, the converter breaks the\n * list so the model element is inserted to the view parent element corresponding to its model parent element.\n *\n * The converter prevents such situations:\n *\n *\t\t// Model: // View:\n *\t\t<listItem>foo</listItem> <ul>\n *\t\t<listItem>bar</listItem> <li>foo</li>\n *\t\t <li>bar</li>\n *\t\t </ul>\n *\n *\t\t// After change: // Correct view guaranteed by this converter:\n *\t\t<listItem>foo</listItem> <ul><li>foo</li></ul><p>xxx</p><ul><li>bar</li></ul>\n *\t\t<paragraph>xxx</paragraph> // Instead of this wrong view state:\n *\t\t<listItem>bar</listItem> <ul><li>foo</li><p>xxx</p><li>bar</li></ul>\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewSplitOnInsert( evt, data, conversionApi ) {\n\tif ( data.item.name != 'listItem' ) {\n\t\tlet viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst lists = [];\n\n\t\t// Break multiple ULs/OLs if there are.\n\t\t//\n\t\t// Imagine following list:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\t// Insert paragraph after item 1.1.1:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t//\n\t\t// Lorem ipsum.\n\t\t//\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\t// In this case 1.1.2 has to become beginning of a new list.\n\t\t// We need to break list before 1.1.2 (obvious), then we need to break list also before 1.2.\n\t\t// Then we need to move those broken pieces one after another and merge:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t//\n\t\t// Lorem ipsum.\n\t\t//\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\twhile ( viewPosition.parent.name == 'ul' || viewPosition.parent.name == 'ol' ) {\n\t\t\tviewPosition = viewWriter.breakContainer( viewPosition );\n\n\t\t\tif ( viewPosition.parent.name != 'li' ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Remove lists that are after inserted element.\n\t\t\t// They will be brought back later, below the inserted element.\n\t\t\tconst removeStart = viewPosition;\n\t\t\tconst removeEnd = viewWriter.createPositionAt( viewPosition.parent, 'end' );\n\n\t\t\t// Don't remove if there is nothing to remove.\n\t\t\tif ( !removeStart.isEqual( removeEnd ) ) {\n\t\t\t\tconst removed = viewWriter.remove( viewWriter.createRange( removeStart, removeEnd ) );\n\t\t\t\tlists.push( removed );\n\t\t\t}\n\n\t\t\tviewPosition = viewWriter.createPositionAfter( viewPosition.parent );\n\t\t}\n\n\t\t// Bring back removed lists.\n\t\tif ( lists.length > 0 ) {\n\t\t\tfor ( let i = 0; i < lists.length; i++ ) {\n\t\t\t\tconst previousList = viewPosition.nodeBefore;\n\t\t\t\tconst insertedRange = viewWriter.insert( viewPosition, lists[ i ] );\n\t\t\t\tviewPosition = insertedRange.end;\n\n\t\t\t\t// Don't merge first list! We want a split in that place (this is why this converter is introduced).\n\t\t\t\tif ( i > 0 ) {\n\t\t\t\t\tconst mergePos = mergeViewLists( viewWriter, previousList, previousList.nextSibling );\n\n\t\t\t\t\t// If `mergePos` is in `previousList` it means that the lists got merged.\n\t\t\t\t\t// In this case, we need to fix insert position.\n\t\t\t\t\tif ( mergePos && mergePos.parent == previousList ) {\n\t\t\t\t\t\tviewPosition.offset--;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Merge last inserted list with element after it.\n\t\t\tmergeViewLists( viewWriter, viewPosition.nodeBefore, viewPosition.nodeAfter );\n\t\t}\n\t}\n}\n\n/**\n * A special model-to-view converter introduced by the {@link module:list/list~List list feature}. This converter takes care of\n * merging view lists after something is removed or moved from near them.\n *\n * Example:\n *\n *\t\t// Model: // View:\n *\t\t<listItem>foo</listItem> <ul><li>foo</li></ul>\n *\t\t<paragraph>xxx</paragraph> <p>xxx</p>\n *\t\t<listItem>bar</listItem> <ul><li>bar</li></ul>\n *\n *\t\t// After change: // Correct view guaranteed by this converter:\n *\t\t<listItem>foo</listItem> <ul>\n *\t\t<listItem>bar</listItem> <li>foo</li>\n *\t\t <li>bar</li>\n *\t\t </ul>\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewMergeAfter( evt, data, conversionApi ) {\n\tconst viewPosition = conversionApi.mapper.toViewPosition( data.position );\n\tconst viewItemPrev = viewPosition.nodeBefore;\n\tconst viewItemNext = viewPosition.nodeAfter;\n\n\t// Merge lists if something (remove, move) was done from inside of list.\n\t// Merging will be done only if both items are view lists of the same type.\n\t// The check is done inside the helper function.\n\tmergeViewLists( conversionApi.writer, viewItemPrev, viewItemNext );\n}\n\n/**\n * A view-to-model converter that converts the `<li>` view elements into the `listItem` model elements.\n *\n * To set correct values of the `listType` and `listIndent` attributes the converter:\n * * checks `<li>`'s parent,\n * * stores and increases the `conversionApi.store.indent` value when `<li>`'s sub-items are converted.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function viewModelConverter( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.consume( data.viewItem, { name: true } ) ) {\n\t\tconst writer = conversionApi.writer;\n\n\t\t// 1. Create `listItem` model element.\n\t\tconst listItem = writer.createElement( 'listItem' );\n\n\t\t// 2. Handle `listItem` model element attributes.\n\t\tconst indent = getIndent( data.viewItem );\n\n\t\twriter.setAttribute( 'listIndent', indent, listItem );\n\n\t\t// Set 'bulleted' as default. If this item is pasted into a context,\n\t\tconst type = data.viewItem.parent && data.viewItem.parent.name == 'ol' ? 'numbered' : 'bulleted';\n\t\twriter.setAttribute( 'listType', type, listItem );\n\n\t\t// Try to find allowed parent for list item.\n\t\tconst splitResult = conversionApi.splitToAllowedParent( listItem, data.modelCursor );\n\n\t\t// When there is no allowed parent it means that list item cannot be converted at current model position\n\t\t// and in any of position ancestors.\n\t\tif ( !splitResult ) {\n\t\t\treturn;\n\t\t}\n\n\t\twriter.insert( listItem, splitResult.position );\n\n\t\tconst nextPosition = viewToModelListItemChildrenConverter( listItem, data.viewItem.getChildren(), conversionApi );\n\n\t\t// Result range starts before the first item and ends after the last.\n\t\tdata.modelRange = writer.createRange( data.modelCursor, nextPosition );\n\n\t\t// When `data.modelCursor` parent had to be split to insert list item...\n\t\tif ( splitResult.cursorParent ) {\n\t\t\t// Continue conversion in the split element.\n\t\t\tdata.modelCursor = writer.createPositionAt( splitResult.cursorParent, 0 );\n\t\t} else {\n\t\t\t// Otherwise continue conversion after the last list item.\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t}\n\t}\n}\n\n/**\n * A view-to-model converter for the `<ul>` and `<ol>` view elements that cleans the input view of garbage.\n * This is mostly to clean whitespaces from between the `<li>` view elements inside the view list element, however, also\n * incorrect data can be cleared if the view was incorrect.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function cleanList( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.test( data.viewItem, { name: true } ) ) {\n\t\t// Caching children because when we start removing them iterating fails.\n\t\tconst children = Array.from( data.viewItem.getChildren() );\n\n\t\tfor ( const child of children ) {\n\t\t\tconst isWrongElement = !( child.is( 'li' ) || isList( child ) );\n\n\t\t\tif ( isWrongElement ) {\n\t\t\t\tchild._remove();\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * A view-to-model converter for the `<li>` elements that cleans whitespace formatting from the input view.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function cleanListItem( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.test( data.viewItem, { name: true } ) ) {\n\t\tif ( data.viewItem.childCount === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst children = [ ...data.viewItem.getChildren() ];\n\n\t\tlet foundList = false;\n\t\tlet firstNode = true;\n\n\t\tfor ( const child of children ) {\n\t\t\tif ( foundList && !isList( child ) ) {\n\t\t\t\tchild._remove();\n\t\t\t}\n\n\t\t\tif ( child.is( 'text' ) ) {\n\t\t\t\t// If this is the first node and it's a text node, left-trim it.\n\t\t\t\tif ( firstNode ) {\n\t\t\t\t\tchild._data = child.data.replace( /^\\s+/, '' );\n\t\t\t\t}\n\n\t\t\t\t// If this is the last text node before <ul> or <ol>, right-trim it.\n\t\t\t\tif ( !child.nextSibling || isList( child.nextSibling ) ) {\n\t\t\t\t\tchild._data = child.data.replace( /\\s+$/, '' );\n\t\t\t\t}\n\t\t\t} else if ( isList( child ) ) {\n\t\t\t\t// If this is a <ul> or <ol>, do not process it, just mark that we already visited list element.\n\t\t\t\tfoundList = true;\n\t\t\t}\n\n\t\t\tfirstNode = false;\n\t\t}\n\t}\n}\n\n/**\n * Returns a callback for model position to view position mapping for {@link module:engine/conversion/mapper~Mapper}. The callback fixes\n * positions between the `listItem` elements that would be incorrectly mapped because of how list items are represented in the model\n * and in the view.\n *\n * @see module:engine/conversion/mapper~Mapper#event:modelToViewPosition\n * @param {module:engine/view/view~View} view A view instance.\n * @returns {Function}\n */\nexport function modelToViewPosition( view ) {\n\treturn ( evt, data ) => {\n\t\tif ( data.isPhantom ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelItem = data.modelPosition.nodeBefore;\n\n\t\tif ( modelItem && modelItem.is( 'listItem' ) ) {\n\t\t\tconst viewItem = data.mapper.toViewElement( modelItem );\n\t\t\tconst topmostViewList = viewItem.getAncestors().find( isList );\n\t\t\tconst walker = view.createPositionAt( viewItem, 0 ).getWalker();\n\n\t\t\tfor ( const value of walker ) {\n\t\t\t\tif ( value.type == 'elementStart' && value.item.is( 'li' ) ) {\n\t\t\t\t\tdata.viewPosition = value.previousPosition;\n\n\t\t\t\t\tbreak;\n\t\t\t\t} else if ( value.type == 'elementEnd' && value.item == topmostViewList ) {\n\t\t\t\t\tdata.viewPosition = value.nextPosition;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * The callback for view position to model position mapping for {@link module:engine/conversion/mapper~Mapper}. The callback fixes\n * positions between the `<li>` elements that would be incorrectly mapped because of how list items are represented in the model\n * and in the view.\n *\n * @see module:engine/conversion/mapper~Mapper#event:viewToModelPosition\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function viewToModelPosition( model ) {\n\treturn ( evt, data ) => {\n\t\tconst viewPos = data.viewPosition;\n\t\tconst viewParent = viewPos.parent;\n\t\tconst mapper = data.mapper;\n\n\t\tif ( viewParent.name == 'ul' || viewParent.name == 'ol' ) {\n\t\t\t// Position is directly in <ul> or <ol>.\n\t\t\tif ( !viewPos.isAtEnd ) {\n\t\t\t\t// If position is not at the end, it must be before <li>.\n\t\t\t\t// Get that <li>, map it to `listItem` and set model position before that `listItem`.\n\t\t\t\tconst modelNode = mapper.toModelElement( viewPos.nodeAfter );\n\n\t\t\t\tdata.modelPosition = model.createPositionBefore( modelNode );\n\t\t\t} else {\n\t\t\t\t// Position is at the end of <ul> or <ol>, so there is no <li> after it to be mapped.\n\t\t\t\t// There is <li> before the position, but we cannot just map it to `listItem` and set model position after it,\n\t\t\t\t// because that <li> may contain nested items.\n\t\t\t\t// We will check \"model length\" of that <li>, in other words - how many `listItem`s are in that <li>.\n\t\t\t\tconst modelNode = mapper.toModelElement( viewPos.nodeBefore );\n\t\t\t\tconst modelLength = mapper.getModelLength( viewPos.nodeBefore );\n\n\t\t\t\t// Then we get model position before mapped `listItem` and shift it accordingly.\n\t\t\t\tdata.modelPosition = model.createPositionBefore( modelNode ).getShiftedBy( modelLength );\n\t\t\t}\n\n\t\t\tevt.stop();\n\t\t} else if (\n\t\t\tviewParent.name == 'li' &&\n\t\t\tviewPos.nodeBefore &&\n\t\t\t( viewPos.nodeBefore.name == 'ul' || viewPos.nodeBefore.name == 'ol' )\n\t\t) {\n\t\t\t// In most cases when view position is in <li> it is in text and this is a correct position.\n\t\t\t// However, if position is after <ul> or <ol> we have to fix it -- because in model <ul>/<ol> are not in the `listItem`.\n\t\t\tconst modelNode = mapper.toModelElement( viewParent );\n\n\t\t\t// Check all <ul>s and <ol>s that are in the <li> but before mapped position.\n\t\t\t// Get model length of those elements and then add it to the offset of `listItem` mapped to the original <li>.\n\t\t\tlet modelLength = 1; // Starts from 1 because the original <li> has to be counted in too.\n\t\t\tlet viewList = viewPos.nodeBefore;\n\n\t\t\twhile ( viewList && isList( viewList ) ) {\n\t\t\t\tmodelLength += mapper.getModelLength( viewList );\n\n\t\t\t\tviewList = viewList.previousSibling;\n\t\t\t}\n\n\t\t\tdata.modelPosition = model.createPositionBefore( modelNode ).getShiftedBy( modelLength );\n\n\t\t\tevt.stop();\n\t\t}\n\t};\n}\n\n/**\n * Post-fixer that reacts to changes on document and fixes incorrect model states.\n *\n * In the example below, there is a correct list structure.\n * Then the middle element is removed so the list structure will become incorrect:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>Item 2</listItem> <--- this is removed.\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Item 3</listItem>\n *\n * The list structure after the middle element is removed:\n *\n * \t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Item 3</listItem>\n *\n * Should become:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>Item 3</listItem> <--- note that indent got post-fixed.\n *\n * @param {module:engine/model/model~Model} model The data model.\n * @param {module:engine/model/writer~Writer} writer The writer to do changes with.\n * @returns {Boolean} `true` if any change has been applied, `false` otherwise.\n */\nexport function modelChangePostFixer( model, writer ) {\n\tconst changes = model.document.differ.getChanges();\n\tconst itemToListHead = new Map();\n\n\tlet applied = false;\n\n\tfor ( const entry of changes ) {\n\t\tif ( entry.type == 'insert' && entry.name == 'listItem' ) {\n\t\t\t_addListToFix( entry.position );\n\t\t} else if ( entry.type == 'insert' && entry.name != 'listItem' ) {\n\t\t\tif ( entry.name != '$text' ) {\n\t\t\t\t// In case of renamed element.\n\t\t\t\tconst item = entry.position.nodeAfter;\n\n\t\t\t\tif ( item.hasAttribute( 'listIndent' ) ) {\n\t\t\t\t\twriter.removeAttribute( 'listIndent', item );\n\n\t\t\t\t\tapplied = true;\n\t\t\t\t}\n\n\t\t\t\tif ( item.hasAttribute( 'listType' ) ) {\n\t\t\t\t\twriter.removeAttribute( 'listType', item );\n\n\t\t\t\t\tapplied = true;\n\t\t\t\t}\n\n\t\t\t\tfor ( const innerItem of Array.from( model.createRangeIn( item ) ).filter( e => e.item.is( 'listItem' ) ) ) {\n\t\t\t\t\t_addListToFix( innerItem.previousPosition );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tconst posAfter = entry.position.getShiftedBy( entry.length );\n\n\t\t\t_addListToFix( posAfter );\n\t\t} else if ( entry.type == 'remove' && entry.name == 'listItem' ) {\n\t\t\t_addListToFix( entry.position );\n\t\t} else if ( entry.type == 'attribute' && entry.attributeKey == 'listIndent' ) {\n\t\t\t_addListToFix( entry.range.start );\n\t\t} else if ( entry.type == 'attribute' && entry.attributeKey == 'listType' ) {\n\t\t\t_addListToFix( entry.range.start );\n\t\t}\n\t}\n\n\tfor ( const listHead of itemToListHead.values() ) {\n\t\t_fixListIndents( listHead );\n\t\t_fixListTypes( listHead );\n\t}\n\n\treturn applied;\n\n\tfunction _addListToFix( position ) {\n\t\tconst prev = position.nodeBefore;\n\n\t\tif ( !prev || !prev.is( 'listItem' ) ) {\n\t\t\tconst item = position.nodeAfter;\n\n\t\t\tif ( item && item.is( 'listItem' ) ) {\n\t\t\t\titemToListHead.set( item, item );\n\t\t\t}\n\t\t} else {\n\t\t\tlet listHead = prev;\n\n\t\t\tif ( itemToListHead.has( listHead ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\twhile ( listHead.previousSibling && listHead.previousSibling.is( 'listItem' ) ) {\n\t\t\t\tlistHead = listHead.previousSibling;\n\n\t\t\t\tif ( itemToListHead.has( listHead ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\titemToListHead.set( position.nodeBefore, listHead );\n\t\t}\n\t}\n\n\tfunction _fixListIndents( item ) {\n\t\tlet maxIndent = 0;\n\t\tlet fixBy = null;\n\n\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\t\tif ( itemIndent > maxIndent ) {\n\t\t\t\tlet newIndent;\n\n\t\t\t\tif ( fixBy === null ) {\n\t\t\t\t\tfixBy = itemIndent - maxIndent;\n\t\t\t\t\tnewIndent = maxIndent;\n\t\t\t\t} else {\n\t\t\t\t\tif ( fixBy > itemIndent ) {\n\t\t\t\t\t\tfixBy = itemIndent;\n\t\t\t\t\t}\n\n\t\t\t\t\tnewIndent = itemIndent - fixBy;\n\t\t\t\t}\n\n\t\t\t\twriter.setAttribute( 'listIndent', newIndent, item );\n\n\t\t\t\tapplied = true;\n\t\t\t} else {\n\t\t\t\tfixBy = null;\n\t\t\t\tmaxIndent = item.getAttribute( 'listIndent' ) + 1;\n\t\t\t}\n\n\t\t\titem = item.nextSibling;\n\t\t}\n\t}\n\n\tfunction _fixListTypes( item ) {\n\t\tlet typesStack = [];\n\t\tlet prev = null;\n\n\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\t\tif ( prev && prev.getAttribute( 'listIndent' ) > itemIndent ) {\n\t\t\t\ttypesStack = typesStack.slice( 0, itemIndent + 1 );\n\t\t\t}\n\n\t\t\tif ( itemIndent != 0 ) {\n\t\t\t\tif ( typesStack[ itemIndent ] ) {\n\t\t\t\t\tconst type = typesStack[ itemIndent ];\n\n\t\t\t\t\tif ( item.getAttribute( 'listType' ) != type ) {\n\t\t\t\t\t\twriter.setAttribute( 'listType', type, item );\n\n\t\t\t\t\t\tapplied = true;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\ttypesStack[ itemIndent ] = item.getAttribute( 'listType' );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tprev = item;\n\t\t\titem = item.nextSibling;\n\t\t}\n\t}\n}\n\n/**\n * A fixer for pasted content that includes list items.\n *\n * It fixes indentation of pasted list items so the pasted items match correctly to the context they are pasted into.\n *\n * Example:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>A</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>B^</listItem>\n *\t\t// At ^ paste: <listItem listType=\"bulleted\" listIndent=4>X</listItem>\n *\t\t// <listItem listType=\"bulleted\" listIndent=5>Y</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>C</listItem>\n *\n * Should become:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>A</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>BX</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Y/listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>C</listItem>\n *\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Array} args Arguments of {@link module:engine/model/model~Model#insertContent}.\n */\nexport function modelIndentPasteFixer( evt, [ content, selectable ] ) {\n\t// Check whether inserted content starts from a `listItem`. If it does not, it means that there are some other\n\t// elements before it and there is no need to fix indents, because even if we insert that content into a list,\n\t// that list will be broken.\n\t// Note: we also need to handle singular elements because inserting item with indent 0 into 0,1,[],2\n\t// would create incorrect model.\n\tlet item = content.is( 'documentFragment' ) ? content.getChild( 0 ) : content;\n\n\tlet selection;\n\n\tif ( !selectable ) {\n\t\tselection = this.document.selection;\n\t} else {\n\t\tselection = this.createSelection( selectable );\n\t}\n\n\tif ( item && item.is( 'listItem' ) ) {\n\t\t// Get a reference list item. Inserted list items will be fixed according to that item.\n\t\tconst pos = selection.getFirstPosition();\n\t\tlet refItem = null;\n\n\t\tif ( pos.parent.is( 'listItem' ) ) {\n\t\t\trefItem = pos.parent;\n\t\t} else if ( pos.nodeBefore && pos.nodeBefore.is( 'listItem' ) ) {\n\t\t\trefItem = pos.nodeBefore;\n\t\t}\n\n\t\t// If there is `refItem` it means that we do insert list items into an existing list.\n\t\tif ( refItem ) {\n\t\t\t// First list item in `data` has indent equal to 0 (it is a first list item). It should have indent equal\n\t\t\t// to the indent of reference item. We have to fix the first item and all of it's children and following siblings.\n\t\t\t// Indent of all those items has to be adjusted to reference item.\n\t\t\tconst indentChange = refItem.getAttribute( 'listIndent' );\n\n\t\t\t// Fix only if there is anything to fix.\n\t\t\tif ( indentChange > 0 ) {\n\t\t\t\t// Adjust indent of all \"first\" list items in inserted data.\n\t\t\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\t\t\titem._setAttribute( 'listIndent', item.getAttribute( 'listIndent' ) + indentChange );\n\n\t\t\t\t\titem = item.nextSibling;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Helper function that converts children of a given `<li>` view element into corresponding model elements.\n// The function maintains proper order of elements if model `listItem` is split during the conversion\n// due to block children conversion.\n//\n// @param {module:engine/model/element~Element} listItemModel List item model element to which converted children will be inserted.\n// @param {Iterable.<module:engine/view/node~Node>} viewChildren View elements which will be converted.\n// @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n// @returns {module:engine/model/position~Position} Position on which next elements should be inserted after children conversion.\nfunction viewToModelListItemChildrenConverter( listItemModel, viewChildren, conversionApi ) {\n\tconst { writer, schema } = conversionApi;\n\n\t// A position after the last inserted `listItem`.\n\tlet nextPosition = writer.createPositionAfter( listItemModel );\n\n\t// Check all children of the converted `<li>`. At this point we assume there are no \"whitespace\" view text nodes\n\t// in view list, between view list items. This should be handled by `<ul>` and `<ol>` converters.\n\tfor ( const child of viewChildren ) {\n\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t\t\t// If the children is a list, we will insert its conversion result after currently handled `listItem`.\n\t\t\t// Then, next insertion position will be set after all the new list items (and maybe other elements if\n\t\t\t// something split list item).\n\t\t\t//\n\t\t\t// If this is a list, we expect that some `listItem`s and possibly other blocks will be inserted, however `.modelCursor`\n\t\t\t// should be set after last `listItem` (or block). This is why it feels safe to use it as `nextPosition`\n\t\t\tnextPosition = conversionApi.convertItem( child, nextPosition ).modelCursor;\n\t\t} else {\n\t\t\t// If this is not a list, try inserting content at the end of the currently handled `listItem`.\n\t\t\tconst result = conversionApi.convertItem( child, writer.createPositionAt( listItemModel, 'end' ) );\n\n\t\t\t// It may end up that the current `listItem` becomes split (if that content cannot be inside `listItem`). For example:\n\t\t\t//\n\t\t\t// <li><p>Foo</p></li>\n\t\t\t//\n\t\t\t// will be converted to:\n\t\t\t//\n\t\t\t// <listItem></listItem><paragraph>Foo</paragraph><listItem></listItem>\n\t\t\t//\n\t\t\tconst convertedChild = result.modelRange.start.nodeAfter;\n\t\t\tconst wasSplit = convertedChild && convertedChild.is( 'element' ) && !schema.checkChild( listItemModel, convertedChild.name );\n\n\t\t\tif ( wasSplit ) {\n\t\t\t\t// As `lastListItem` got split, we need to update it to the second part of the split `listItem` element.\n\t\t\t\t//\n\t\t\t\t// `modelCursor` should be set to a position where the conversion should continue. There are multiple possible scenarios\n\t\t\t\t// that may happen. Usually, `modelCursor` (marked as `#` below) would point to the second list item after conversion:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><p>Foo</p></li>` -> `<listItem></listItem><paragraph>Foo</paragraph><listItem>#</listItem>`\n\t\t\t\t//\n\t\t\t\t// However, in some cases, like auto-paragraphing, the position is placed at the end of the block element:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><div>Foo</div></li>` -> `<listItem></listItem><paragraph>Foo#</paragraph><listItem></listItem>`\n\t\t\t\t//\n\t\t\t\t// or after an element if another element broken auto-paragraphed element:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><div><h2>Foo</h2></div></li>` -> `<listItem></listItem><heading1>Foo</heading1>#<listItem></listItem>`\n\t\t\t\t//\n\t\t\t\t// We need to check for such cases and use proper list item and position based on it.\n\t\t\t\t//\n\t\t\t\tif ( result.modelCursor.parent.is( 'listItem' ) ) {\n\t\t\t\t\t// (1).\n\t\t\t\t\tlistItemModel = result.modelCursor.parent;\n\t\t\t\t} else {\n\t\t\t\t\t// (2), (3).\n\t\t\t\t\tlistItemModel = findNextListItem( result.modelCursor );\n\t\t\t\t}\n\n\t\t\t\tnextPosition = writer.createPositionAfter( listItemModel );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn nextPosition;\n}\n\n// Helper function that seeks for a next list item starting from given `startPosition`.\nfunction findNextListItem( startPosition ) {\n\tconst treeWalker = new TreeWalker( { startPosition } );\n\n\tlet value;\n\n\tdo {\n\t\tvalue = treeWalker.next();\n\t} while ( !value.value.item.is( 'listItem' ) );\n\n\treturn value.value.item;\n}\n\n// Helper function that takes all children of given `viewRemovedItem` and moves them in a correct place, according\n// to other given parameters.\nfunction hoistNestedLists( nextIndent, modelRemoveStartPosition, viewRemoveStartPosition, viewRemovedItem, conversionApi, model ) {\n\t// Find correct previous model list item element.\n\t// The element has to have either same or smaller indent than given reference indent.\n\t// This will be the model element which will get nested items (if it has smaller indent) or sibling items (if it has same indent).\n\t// Keep in mind that such element might not be found, if removed item was the first item.\n\tconst prevModelItem = getSiblingListItem( modelRemoveStartPosition.nodeBefore, {\n\t\tsameIndent: true,\n\t\tsmallerIndent: true,\n\t\tlistIndent: nextIndent,\n\t\tfoo: 'b'\n\t} );\n\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\n\t// Indent of found element or `null` if the element has not been found.\n\tconst prevIndent = prevModelItem ? prevModelItem.getAttribute( 'listIndent' ) : null;\n\n\tlet insertPosition;\n\n\tif ( !prevModelItem ) {\n\t\t// If element has not been found, simply insert lists at the position where the removed item was:\n\t\t//\n\t\t// Lorem ipsum.\n\t\t// 1 -------- <--- this is removed, no previous list item, put nested items in place of removed item.\n\t\t// 1.1 -------- <--- this is reference indent.\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// Lorem ipsum.\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\tinsertPosition = viewRemoveStartPosition;\n\t} else if ( prevIndent == nextIndent ) {\n\t\t// If element has been found and has same indent as reference indent it means that nested items should\n\t\t// become siblings of found element:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.2 -------- <--- this is `prevModelItem`.\n\t\t// 2 -------- <--- this is removed, previous list item has indent same as reference indent.\n\t\t// 2.1 -------- <--- this is reference indent, this and 2.2 should become siblings of 1.2.\n\t\t// 2.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.2 --------\n\t\t// 2.1 --------\n\t\t// 2.2 --------\n\t\tconst prevViewList = mapper.toViewElement( prevModelItem ).parent;\n\t\tinsertPosition = viewWriter.createPositionAfter( prevViewList );\n\t} else {\n\t\t// If element has been found and has smaller indent as reference indent it means that nested items\n\t\t// should become nested items of found item:\n\t\t//\n\t\t// 1 -------- <--- this is `prevModelItem`.\n\t\t// 1.1 -------- <--- this is removed, previous list item has indent smaller than reference indent.\n\t\t// 1.1.1 -------- <--- this is reference indent, this and 1.1.1 should become nested items of 1.\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Note: in this case 1.1.1 have indent 2 while 1 have indent 0. In model that should not be possible,\n\t\t// because following item may have indent bigger only by one. But this is fixed by postfixer.\n\t\tconst modelPosition = model.createPositionAt( prevModelItem, 'end' );\n\t\tinsertPosition = mapper.toViewPosition( modelPosition );\n\t}\n\n\tinsertPosition = positionAfterUiElements( insertPosition );\n\n\t// Handle multiple lists. This happens if list item has nested numbered and bulleted lists. Following lists\n\t// are inserted after the first list (no need to recalculate insertion position for them).\n\tfor ( const child of [ ...viewRemovedItem.getChildren() ] ) {\n\t\tif ( isList( child ) ) {\n\t\t\tinsertPosition = viewWriter.move( viewWriter.createRangeOn( child ), insertPosition ).end;\n\n\t\t\tmergeViewLists( viewWriter, child, child.nextSibling );\n\t\t\tmergeViewLists( viewWriter, child.previousSibling, child );\n\t\t}\n\t}\n}\n\n// Checks if view element is a list type (ul or ol).\n//\n// @param {module:engine/view/element~Element} viewElement\n// @returns {Boolean}\nfunction isList( viewElement ) {\n\treturn viewElement.is( 'ol' ) || viewElement.is( 'ul' );\n}\n\n// Calculates the indent value for a list item. Handles HTML compliant and non-compliant lists.\n//\n// Also, fixes non HTML compliant lists indents:\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\t\t |-> OL |-> OL\n//\t\t |-> OL |\n//\t\t | |-> OL |\n//\t\t | |-> OL |\n//\t\t | |-> LI (parent LIs: 1) |-> LI (indent: 1)\n//\t\t |-> LI (parent LIs: 1) |-> LI (indent: 1)\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> OL |\n//\t\t |-> OL |\n//\t\t |-> OL |\n//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\t\t|-> OL |-> OL\n//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 1)\n//\n// @param {module:engine/view/element~Element} listItem\n// @param {Object} conversionStore\n// @returns {Number}\nfunction getIndent( listItem ) {\n\tlet indent = 0;\n\n\tlet parent = listItem.parent;\n\n\twhile ( parent ) {\n\t\t// Each LI in the tree will result in an increased indent for HTML compliant lists.\n\t\tif ( parent.is( 'li' ) ) {\n\t\t\tindent++;\n\t\t} else {\n\t\t\t// If however the list is nested in other list we should check previous sibling of any of the list elements...\n\t\t\tconst previousSibling = parent.previousSibling;\n\n\t\t\t// ...because the we might need increase its indent:\n\t\t\t//\t\tbefore: fixed list:\n\t\t\t//\t\tOL OL\n\t\t\t//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n\t\t\t//\t\t|-> OL |-> OL\n\t\t\t//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 1)\n\t\t\tif ( previousSibling && previousSibling.is( 'li' ) ) {\n\t\t\t\tindent++;\n\t\t\t}\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n\n\treturn indent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/listediting\n */\n\nimport ListCommand from './listcommand';\nimport IndentCommand from './indentcommand';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\nimport {\n\tcleanList,\n\tcleanListItem,\n\tmodelViewInsertion,\n\tmodelViewChangeType,\n\tmodelViewMergeAfterChangeType,\n\tmodelViewMergeAfter,\n\tmodelViewRemove,\n\tmodelViewSplitOnInsert,\n\tmodelViewChangeIndent,\n\tmodelChangePostFixer,\n\tmodelIndentPasteFixer,\n\tviewModelConverter,\n\tmodelToViewPosition,\n\tviewToModelPosition\n} from './converters';\n\n/**\n * The engine of the list feature. It handles creating, editing and removing lists and list items.\n *\n * It registers the `'numberedList'`, `'bulletedList'`, `'indentList'` and `'outdentList'` commands.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ListEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ListEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Paragraph ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Schema.\n\t\t// Note: in case `$block` will ever be allowed in `listItem`, keep in mind that this feature\n\t\t// uses `Selection#getSelectedBlocks()` without any additional processing to obtain all selected list items.\n\t\t// If there are blocks allowed inside list item, algorithms using `getSelectedBlocks()` will have to be modified.\n\t\teditor.model.schema.register( 'listItem', {\n\t\t\tinheritAllFrom: '$block',\n\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n\t\t} );\n\n\t\t// Converters.\n\t\tconst data = editor.data;\n\t\tconst editing = editor.editing;\n\n\t\teditor.model.document.registerPostFixer( writer => modelChangePostFixer( editor.model, writer ) );\n\n\t\tediting.mapper.registerViewToModelLength( 'li', getViewListItemLength );\n\t\tdata.mapper.registerViewToModelLength( 'li', getViewListItemLength );\n\n\t\tediting.mapper.on( 'modelToViewPosition', modelToViewPosition( editing.view ) );\n\t\tediting.mapper.on( 'viewToModelPosition', viewToModelPosition( editor.model ) );\n\t\tdata.mapper.on( 'modelToViewPosition', modelToViewPosition( editing.view ) );\n\n\t\teditor.conversion.for( 'editingDowncast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'insert', modelViewSplitOnInsert, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'insert:listItem', modelViewInsertion( editor.model ) );\n\t\t\t\tdispatcher.on( 'attribute:listType:listItem', modelViewChangeType, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'attribute:listType:listItem', modelViewMergeAfterChangeType, { priority: 'low' } );\n\t\t\t\tdispatcher.on( 'attribute:listIndent:listItem', modelViewChangeIndent( editor.model ) );\n\t\t\t\tdispatcher.on( 'remove:listItem', modelViewRemove( editor.model ) );\n\t\t\t\tdispatcher.on( 'remove', modelViewMergeAfter, { priority: 'low' } );\n\t\t\t} );\n\n\t\teditor.conversion.for( 'dataDowncast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'insert', modelViewSplitOnInsert, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'insert:listItem', modelViewInsertion( editor.model ) );\n\t\t\t} );\n\n\t\teditor.conversion.for( 'upcast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'element:ul', cleanList, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:ol', cleanList, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:li', cleanListItem, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:li', viewModelConverter );\n\t\t\t} );\n\n\t\t// Fix indentation of pasted items.\n\t\teditor.model.on( 'insertContent', modelIndentPasteFixer, { priority: 'high' } );\n\n\t\t// Register commands for numbered and bulleted list.\n\t\teditor.commands.add( 'numberedList', new ListCommand( editor, 'numbered' ) );\n\t\teditor.commands.add( 'bulletedList', new ListCommand( editor, 'bulleted' ) );\n\n\t\t// Register commands for indenting.\n\t\teditor.commands.add( 'indentList', new IndentCommand( editor, 'forward' ) );\n\t\teditor.commands.add( 'outdentList', new IndentCommand( editor, 'backward' ) );\n\n\t\tconst viewDocument = editing.view.document;\n\n\t\t// Overwrite default Enter key behavior.\n\t\t// If Enter key is pressed with selection collapsed in empty list item, outdent it instead of breaking it.\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tconst doc = this.editor.model.document;\n\t\t\tconst positionParent = doc.selection.getLastPosition().parent;\n\n\t\t\tif ( doc.selection.isCollapsed && positionParent.name == 'listItem' && positionParent.isEmpty ) {\n\t\t\t\tthis.editor.execute( 'outdentList' );\n\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t} );\n\n\t\t// Overwrite default Backspace key behavior.\n\t\t// If Backspace key is pressed with selection collapsed on first position in first list item, outdent it. #83\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\t// Check conditions from those that require less computations like those immediately available.\n\t\t\tif ( data.direction !== 'backward' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst selection = this.editor.model.document.selection;\n\n\t\t\tif ( !selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\t\tif ( !firstPosition.isAtStart ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst positionParent = firstPosition.parent;\n\n\t\t\tif ( positionParent.name !== 'listItem' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst previousIsAListItem = positionParent.previousSibling && positionParent.previousSibling.name === 'listItem';\n\n\t\t\tif ( previousIsAListItem ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis.editor.execute( 'outdentList' );\n\n\t\t\tdata.preventDefault();\n\t\t\tevt.stop();\n\t\t}, { priority: 'high' } );\n\n\t\tconst getCommandExecuter = commandName => {\n\t\t\treturn ( data, cancel ) => {\n\t\t\t\tconst command = this.editor.commands.get( commandName );\n\n\t\t\t\tif ( command.isEnabled ) {\n\t\t\t\t\tthis.editor.execute( commandName );\n\t\t\t\t\tcancel();\n\t\t\t\t}\n\t\t\t};\n\t\t};\n\n\t\teditor.keystrokes.set( 'Tab', getCommandExecuter( 'indentList' ) );\n\t\teditor.keystrokes.set( 'Shift+Tab', getCommandExecuter( 'outdentList' ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tconst commands = this.editor.commands;\n\n\t\tconst indent = commands.get( 'indent' );\n\t\tconst outdent = commands.get( 'outdent' );\n\n\t\tif ( indent ) {\n\t\t\tindent.registerChildCommand( commands.get( 'indentList' ) );\n\t\t}\n\n\t\tif ( outdent ) {\n\t\t\toutdent.registerChildCommand( commands.get( 'outdentList' ) );\n\t\t}\n\t}\n}\n\nfunction getViewListItemLength( element ) {\n\tlet length = 1;\n\n\tfor ( const child of element.getChildren() ) {\n\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t\t\tfor ( const item of child.getChildren() ) {\n\t\t\t\tlength += getViewListItemLength( item );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn length;\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M7 5.75c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM3.5 3v5H2V3.7H1v-1h2.5V3zM.343 17.857l2.59-3.257H2.92a.6.6 0 1 0-1.04 0H.302a2 2 0 1 1 3.995 0h-.001c-.048.405-.16.734-.333.988-.175.254-.59.692-1.244 1.312H4.3v1h-4l.043-.043zM7 14.75a.75.75 0 0 1 .75-.75h9.5a.75.75 0 1 1 0 1.5h-9.5a.75.75 0 0 1-.75-.75z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module list/listui\n */\nimport { createUIComponent } from './utils';\nimport numberedListIcon from '../theme/icons/numberedlist.svg';\nimport bulletedListIcon from '../theme/icons/bulletedlist.svg';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n/**\n * The list UI feature. It introduces the `'numberedList'` and `'bulletedList'` buttons that\n * allow to convert paragraphs to and from list items and indent or outdent them.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ListUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const t = this.editor.t;\n // Create two buttons and link them with numberedList and bulletedList commands.\n createUIComponent(this.editor, 'numberedList', t('ae'), numberedListIcon);\n createUIComponent(this.editor, 'bulletedList', t('af'), bulletedListIcon);\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/converters\n */\n\n/**\n * Returns a function that converts the model \"url\" attribute to the view representation.\n *\n * Depending on the configuration, the view representation can be \"semantic\" (for the data pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"foo\"></oembed>\n *\t\t</figure>\n *\n * or \"non-semantic\" (for the editing view pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"foo\">[ non-semantic media preview for \"foo\" ]</div>\n *\t\t</figure>\n *\n * **Note:** Changing the model \"url\" attribute replaces the entire content of the\n * `<figure>` in the view.\n *\n * @param {module:media-embed/mediaregistry~MediaRegistry} registry The registry providing\n * the media and their content.\n * @param {Object} options\n * @param {String} [options.renderMediaPreview] When `true`, the converter will create the view in the non-semantic form.\n * @param {String} [options.renderForEditingView] When `true`, the converter will create a view specific for the\n * editing pipeline (e.g. including CSS classes, content placeholders).\n * @returns {Function}\n */\nexport function modelToViewUrlAttributeConverter( registry, options ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'attribute:url:media', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst url = data.attributeNewValue;\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\n\t\t// TODO: removing it and creating it from scratch is a hack. We can do better than that.\n\t\tviewWriter.remove( viewWriter.createRangeIn( figure ) );\n\n\t\tconst mediaViewElement = registry.getMediaViewElement( viewWriter, url, options );\n\n\t\tviewWriter.insert( viewWriter.createPositionAt( figure, 0 ), mediaViewElement );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/utils\n */\n\nimport { isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to a media embed widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the media widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label.\n * @returns {module:engine/view/element~Element}\n */\nexport function toMediaWidget( viewElement, writer, label ) {\n\twriter.setCustomProperty( 'media', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { label } );\n}\n\n/**\n * Returns a media widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedMediaViewWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isMediaWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Checks if a given view element is a media widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isMediaWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'media' ) && isWidget( viewElement );\n}\n\n/**\n * Creates a view element representing the media. Either \"semantic\" one for the data pipeline:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"foo\"></oembed>\n *\t\t</figure>\n *\n * or \"non-semantic\" (for the editing view pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"foo\">[ non-semantic media preview for \"foo\" ]</div>\n *\t\t</figure>\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:media-embed/mediaregistry~MediaRegistry} registry\n * @param {String} url\n * @param {Object} options\n * @param {String} [options.useSemanticWrapper]\n * @param {String} [options.renderForEditingView]\n * @returns {module:engine/view/containerelement~ContainerElement}\n */\nexport function createMediaFigureElement( writer, registry, url, options ) {\n\tconst figure = writer.createContainerElement( 'figure', { class: 'media' } );\n\n\t// TODO: This is a hack. Without it, the figure in the data pipeline will contain   because\n\t// its only child is the UIElement (wrapper).\n\t//\n\t// Note: The hack is a copy&paste from widget utils; it makes the figure act like it's a widget.\n\tfigure.getFillerOffset = getFillerOffset;\n\n\twriter.insert( writer.createPositionAt( figure, 0 ), registry.getMediaViewElement( writer, url, options ) );\n\n\treturn figure;\n}\n\n/**\n * Returns a selected media element in the model, if any.\n *\n * @param {module:engine/model/selection~Selection} selection\n * @returns {module:engine/model/element~Element|null}\n */\nexport function getSelectedMediaModelWidget( selection ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\tif ( selectedElement && selectedElement.is( 'media' ) ) {\n\t\treturn selectedElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Creates a media element and inserts it into the model.\n *\n * **Note**: This method will use {@link module:engine/model/model~Model#insertContent `model.insertContent()`} logic of inserting content\n * if no `insertPosition` is passed.\n *\n * @param {module:engine/model/model~Model} model\n * @param {String} url An URL of an embeddable media.\n * @param {module:engine/model/position~Position} [insertPosition] Position to insert media. If not specified,\n * the default behavior of {@link module:engine/model/model~Model#insertContent `model.insertContent()`} will\n * be applied.\n */\nexport function insertMedia( model, url, insertPosition ) {\n\tmodel.change( writer => {\n\t\tconst mediaElement = writer.createElement( 'media', { url } );\n\n\t\tmodel.insertContent( mediaElement, insertPosition );\n\n\t\twriter.setSelection( mediaElement, 'on' );\n\t} );\n}\n\nfunction getFillerOffset() {\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaembedcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findOptimalInsertionPosition } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { getSelectedMediaModelWidget, insertMedia } from './utils';\n\n/**\n * The insert media command.\n *\n * The command is registered by the {@link module:media-embed/mediaembedediting~MediaEmbedEditing} as `'mediaEmbed'`.\n *\n * To insert media at the current selection, execute the command and specify the URL:\n *\n *\t\teditor.execute( 'mediaEmbed', 'http://url.to.the/media' );\n *\n * @extends module:core/command~Command\n */\nexport default class MediaEmbedCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst schema = model.schema;\n\t\tconst position = selection.getFirstPosition();\n\t\tconst selectedMedia = getSelectedMediaModelWidget( selection );\n\n\t\tlet parent = position.parent;\n\n\t\tif ( parent != parent.root ) {\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\tthis.value = selectedMedia ? selectedMedia.getAttribute( 'url' ) : null;\n\t\tthis.isEnabled = schema.checkChild( parent, 'media' );\n\t}\n\n\t/**\n\t * Executes the command, which either:\n\t *\n\t * * updates the URL of the selected media,\n\t * * inserts the new media into the editor and puts the selection around it.\n\t *\n\t * @fires execute\n\t * @param {String} url The URL of the media.\n\t */\n\texecute( url ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst selectedMedia = getSelectedMediaModelWidget( selection );\n\n\t\tif ( selectedMedia ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setAttribute( 'url', url, selectedMedia );\n\t\t\t} );\n\t\t} else {\n\t\t\tconst insertPosition = findOptimalInsertionPosition( selection, model );\n\n\t\t\tinsertMedia( model, url, insertPosition );\n\t\t}\n\t}\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaregistry\n */\n\n/* globals console */\n\nimport mediaPlaceholderIcon from '../theme/icons/media-placeholder.svg';\nimport TooltipView from '@ckeditor/ckeditor5-ui/src/tooltip/tooltipview';\nimport IconView from '@ckeditor/ckeditor5-ui/src/icon/iconview';\nimport Template from '@ckeditor/ckeditor5-ui/src/template';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst mediaPlaceholderIconViewBox = '0 0 64 42';\n\n/**\n * A bridge between the raw media content provider definitions and the editor view content.\n *\n * It helps translating media URLs to corresponding {@link module:engine/view/element~Element view elements}.\n *\n * Mostly used by the {@link module:media-embed/mediaembedediting~MediaEmbedEditing} plugin.\n */\nexport default class MediaRegistry {\n\t/**\n\t * Creates an instance of the {@link module:media-embed/mediaregistry~MediaRegistry} class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The localization services instance.\n\t * @param {module:media-embed/mediaembed~MediaEmbedConfig} config The configuration of the media embed feature.\n\t */\n\tconstructor( locale, config ) {\n\t\tconst providers = config.providers;\n\t\tconst extraProviders = config.extraProviders || [];\n\t\tconst removedProviders = new Set( config.removeProviders );\n\t\tconst providerDefinitions = providers\n\t\t\t.concat( extraProviders )\n\t\t\t.filter( provider => {\n\t\t\t\tconst name = provider.name;\n\n\t\t\t\tif ( !name ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * One of the providers (or extra providers) specified in the media embed configuration\n\t\t\t\t\t * has no name and will not be used by the editor. In order to get this media\n\t\t\t\t\t * provider working, double check your editor configuration.\n\t\t\t\t\t *\n\t\t\t\t\t * @warning media-embed-no-provider-name\n\t\t\t\t\t */\n\t\t\t\t\tconsole.warn( attachLinkToDocumentation(\n\t\t\t\t\t\t'media-embed-no-provider-name: The configured media provider has no name and cannot be used.'\n\t\t\t\t\t), { provider } );\n\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\treturn !removedProviders.has( name );\n\t\t\t} );\n\n\t\t/**\n\t\t * The locale {@link module:utils/locale~Locale} instance.\n\t\t *\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * The media provider definitions available for the registry. Usually corresponding with the\n\t\t * {@link module:media-embed/mediaembed~MediaEmbedConfig media configuration}.\n\t\t *\n\t\t * @member {Array}\n\t\t */\n\t\tthis.providerDefinitions = providerDefinitions;\n\t}\n\n\t/**\n\t * Checks whether the passed URL is representing a certain media type allowed in the editor.\n\t *\n\t * @param {String} url The URL to be checked\n\t * @returns {Boolean}\n\t */\n\thasMedia( url ) {\n\t\treturn !!this._getMedia( url );\n\t}\n\n\t/**\n\t * For the given media URL string and options, it returns the {@link module:engine/view/element~Element view element}\n\t * representing that media.\n\t *\n\t * **Note:** If no URL is specified, an empty view element is returned.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {String} url The URL to be translated into a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderMediaPreview]\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tgetMediaViewElement( writer, url, options ) {\n\t\treturn this._getMedia( url ).getViewElement( writer, options );\n\t}\n\n\t/**\n\t * Returns a `Media` instance for the given URL.\n\t *\n\t * @protected\n\t * @param {String} url The URL of the media.\n\t * @returns {module:media-embed/mediaregistry~Media|null} The `Media` instance or `null` when there is none.\n\t */\n\t_getMedia( url ) {\n\t\tif ( !url ) {\n\t\t\treturn new Media( this.locale );\n\t\t}\n\n\t\turl = url.trim();\n\n\t\tfor ( const definition of this.providerDefinitions ) {\n\t\t\tconst previewRenderer = definition.html;\n\t\t\tlet pattern = definition.url;\n\n\t\t\tif ( !Array.isArray( pattern ) ) {\n\t\t\t\tpattern = [ pattern ];\n\t\t\t}\n\n\t\t\tfor ( const subPattern of pattern ) {\n\t\t\t\tconst match = this._getUrlMatches( url, subPattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\treturn new Media( this.locale, url, match, previewRenderer );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Tries to match `url` to `pattern`.\n\t *\n\t * @private\n\t * @param {String} url The URL of the media.\n\t * @param {RegExp} pattern The pattern that should accept the media URL.\n\t * @returns {Array|null}\n\t */\n\t_getUrlMatches( url, pattern ) {\n\t\t// 1. Try to match without stripping the protocol and \"www\" subdomain.\n\t\tlet match = url.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\t// 2. Try to match after stripping the protocol.\n\t\tlet rawUrl = url.replace( /^https?:\\/\\//, '' );\n\t\tmatch = rawUrl.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\t// 3. Try to match after stripping the \"www\" subdomain.\n\t\trawUrl = rawUrl.replace( /^www\\./, '' );\n\t\tmatch = rawUrl.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n/**\n * Represents media defined by the provider configuration.\n *\n * It can be rendered to the {@link module:engine/view/element~Element view element} and used in the editing or data pipeline.\n *\n * @private\n */\nclass Media {\n\tconstructor( locale, url, match, previewRenderer ) {\n\t\t/**\n\t\t * The URL this Media instance represents.\n\t\t *\n\t\t * @member {String}\n\t\t */\n\t\tthis.url = this._getValidUrl( url );\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method\n\t\t */\n\t\tthis._t = locale.t;\n\n\t\t/**\n\t\t * The output of the `RegExp.match` which validated the {@link #url} of this media.\n\t\t *\n\t\t * @member {Object}\n\t\t */\n\t\tthis._match = match;\n\n\t\t/**\n\t\t * The function returning the HTML string preview of this media.\n\t\t *\n\t\t * @member {Function}\n\t\t */\n\t\tthis._previewRenderer = previewRenderer;\n\t}\n\n\t/**\n\t * Returns the view element representation of the media.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderMediaPreview]\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tgetViewElement( writer, options ) {\n\t\tconst attributes = {};\n\n\t\tif ( options.renderForEditingView || ( options.renderMediaPreview && this.url && this._previewRenderer ) ) {\n\t\t\tif ( this.url ) {\n\t\t\t\tattributes[ 'data-oembed-url' ] = this.url;\n\t\t\t}\n\n\t\t\tif ( options.renderForEditingView ) {\n\t\t\t\tattributes.class = 'ck-media__wrapper';\n\t\t\t}\n\n\t\t\tconst mediaHtml = this._getPreviewHtml( options );\n\n\t\t\treturn writer.createUIElement( 'div', attributes, function( domDocument ) {\n\t\t\t\tconst domElement = this.toDomElement( domDocument );\n\n\t\t\t\tdomElement.innerHTML = mediaHtml;\n\n\t\t\t\treturn domElement;\n\t\t\t} );\n\t\t} else {\n\t\t\tif ( this.url ) {\n\t\t\t\tattributes.url = this.url;\n\t\t\t}\n\n\t\t\treturn writer.createEmptyElement( 'oembed', attributes );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the HTML string of the media content preview.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {String}\n\t */\n\t_getPreviewHtml( options ) {\n\t\tif ( this._previewRenderer ) {\n\t\t\treturn this._previewRenderer( this._match );\n\t\t} else {\n\t\t\t// The placeholder only makes sense for editing view and media which have URLs.\n\t\t\t// Placeholder is never displayed in data and URL-less media have no content.\n\t\t\tif ( this.url && options.renderForEditingView ) {\n\t\t\t\treturn this._getPlaceholderHtml();\n\t\t\t}\n\n\t\t\treturn '';\n\t\t}\n\t}\n\n\t/**\n\t * Returns the placeholder HTML when the media has no content preview.\n\t *\n\t * @returns {String}\n\t */\n\t_getPlaceholderHtml() {\n\t\tconst tooltip = new TooltipView();\n\t\tconst icon = new IconView();\n\n\t\ttooltip.text = this._t( 'Open media in new tab' );\n\t\ticon.content = mediaPlaceholderIcon;\n\t\ticon.viewBox = mediaPlaceholderIconViewBox;\n\n\t\tconst placeholder = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck ck-reset_all ck-media__placeholder'\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: 'ck-media__placeholder__icon'\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [ icon ]\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\ttag: 'a',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: 'ck-media__placeholder__url',\n\t\t\t\t\t\ttarget: '_blank',\n\t\t\t\t\t\trel: 'noopener noreferrer',\n\t\t\t\t\t\thref: this.url\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttag: 'span',\n\t\t\t\t\t\t\tattributes: {\n\t\t\t\t\t\t\t\tclass: 'ck-media__placeholder__url__text'\n\t\t\t\t\t\t\t},\n\t\t\t\t\t\t\tchildren: [ this.url ]\n\t\t\t\t\t\t},\n\t\t\t\t\t\ttooltip\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t]\n\t\t} ).render();\n\n\t\treturn placeholder.outerHTML;\n\t}\n\n\t/**\n\t * Returns the full URL to the specified media.\n\t *\n\t * @param {String} url The URL of the media.\n\t * @returns {String|null}\n\t */\n\t_getValidUrl( url ) {\n\t\tif ( !url ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( url.match( /^https?/ ) ) {\n\t\t\treturn url;\n\t\t}\n\n\t\treturn 'https://' + url;\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 64 42\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M47.426 17V3.713L63.102 0v19.389h-.001l.001.272c0 1.595-2.032 3.43-4.538 4.098-2.506.668-4.538-.083-4.538-1.678 0-1.594 2.032-3.43 4.538-4.098.914-.244 2.032-.565 2.888-.603V4.516L49.076 7.447v9.556A1.014 1.014 0 0 0 49 17h-1.574zM29.5 17h-8.343a7.073 7.073 0 1 0-4.657 4.06v3.781H3.3a2.803 2.803 0 0 1-2.8-2.804V8.63a2.803 2.803 0 0 1 2.8-2.805h4.082L8.58 2.768A1.994 1.994 0 0 1 10.435 1.5h8.985c.773 0 1.477.448 1.805 1.149l1.488 3.177H26.7c1.546 0 2.8 1.256 2.8 2.805V17zm-11.637 0H17.5a1 1 0 0 0-1 1v.05A4.244 4.244 0 1 1 17.863 17zm29.684 2c.97 0 .953-.048.953.889v20.743c0 .953.016.905-.953.905H19.453c-.97 0-.953.048-.953-.905V19.89c0-.937-.016-.889.97-.889h28.077zm-4.701 19.338V22.183H24.154v16.155h18.692zM20.6 21.375v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616V37.53H20.6zm24.233-16.155v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615V37.53h-1.615zM29.485 25.283a.4.4 0 0 1 .593-.35l9.05 4.977a.4.4 0 0 1 0 .701l-9.05 4.978a.4.4 0 0 1-.593-.35v-9.956z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/mediaembedediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { modelToViewUrlAttributeConverter } from './converters';\nimport MediaEmbedCommand from './mediaembedcommand';\nimport MediaRegistry from './mediaregistry';\nimport {\n toMediaWidget,\n createMediaFigureElement\n} from './utils';\nimport '../theme/mediaembedediting.css';\n/**\n * The media embed editing feature.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbedEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'MediaEmbedEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n editor.config.define('mediaEmbed', {\n providers: [\n {\n name: 'dailymotion',\n url: /^dailymotion\\.com\\/video\\/(\\w+)/,\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; \">' + `<iframe src=\"https://www.dailymotion.com/embed/video/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" width=\"480\" height=\"270\" allowfullscreen allow=\"autoplay\">' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'spotify',\n url: [\n /^open\\.spotify\\.com\\/(artist\\/\\w+)/,\n /^open\\.spotify\\.com\\/(album\\/\\w+)/,\n /^open\\.spotify\\.com\\/(track\\/\\w+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 126%;\">' + `<iframe src=\"https://open.spotify.com/embed/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" allowtransparency=\"true\" allow=\"encrypted-media\">' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'youtube',\n url: [\n /^(?:m\\.)?youtube\\.com\\/watch\\?v=([\\w-]+)/,\n /^(?:m\\.)?youtube\\.com\\/v\\/([\\w-]+)/,\n /^youtube\\.com\\/embed\\/([\\w-]+)/,\n /^youtu\\.be\\/([\\w-]+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 56.2493%;\">' + `<iframe src=\"https://www.youtube.com/embed/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen>' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'vimeo',\n url: [\n /^vimeo\\.com\\/(\\d+)/,\n /^vimeo\\.com\\/[^/]+\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/album\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/channels\\/[^/]+\\/(\\d+)/,\n /^vimeo\\.com\\/groups\\/[^/]+\\/videos\\/(\\d+)/,\n /^vimeo\\.com\\/ondemand\\/[^/]+\\/(\\d+)/,\n /^player\\.vimeo\\.com\\/video\\/(\\d+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 56.2493%;\">' + `<iframe src=\"https://player.vimeo.com/video/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" webkitallowfullscreen mozallowfullscreen allowfullscreen>' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'instagram',\n url: /^instagram\\.com\\/p\\/(\\w+)/\n },\n {\n name: 'twitter',\n url: /^twitter\\.com/\n },\n {\n name: 'googleMaps',\n url: /^google\\.com\\/maps/\n },\n {\n name: 'flickr',\n url: /^flickr\\.com/\n },\n {\n name: 'facebook',\n url: /^facebook\\.com/\n }\n ]\n });\n /**\n\t\t * The media registry managing the media providers in the editor.\n\t\t *\n\t\t * @member {module:media-embed/mediaregistry~MediaRegistry} #registry\n\t\t */\n this.registry = new MediaRegistry(editor.locale, editor.config.get('mediaEmbed'));\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const schema = editor.model.schema;\n const t = editor.t;\n const conversion = editor.conversion;\n const renderMediaPreview = editor.config.get('mediaEmbed.previewsInData');\n const registry = this.registry;\n editor.commands.add('mediaEmbed', new MediaEmbedCommand(editor));\n // Configure the schema.\n schema.register('media', {\n isObject: true,\n isBlock: true,\n allowWhere: '$block',\n allowAttributes: ['url']\n });\n // Model -> Data\n conversion.for('dataDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n return createMediaFigureElement(viewWriter, registry, url, { renderMediaPreview: url && renderMediaPreview });\n }\n });\n // Model -> Data (url -> data-oembed-url)\n conversion.for('dataDowncast').add(modelToViewUrlAttributeConverter(registry, { renderMediaPreview }));\n // Model -> View (element)\n conversion.for('editingDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n const figure = createMediaFigureElement(viewWriter, registry, url, { renderForEditingView: true });\n return toMediaWidget(figure, viewWriter, t('ar'));\n }\n });\n // Model -> View (url -> data-oembed-url)\n conversion.for('editingDowncast').add(modelToViewUrlAttributeConverter(registry, { renderForEditingView: true }));\n // View -> Model (data-oembed-url -> url)\n conversion.for('upcast') // Upcast semantic media.\n.elementToElement({\n view: {\n name: 'oembed',\n attributes: { url: true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n }) // Upcast non-semantic media.\n.elementToElement({\n view: {\n name: 'div',\n attributes: { 'data-oembed-url': true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('data-oembed-url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/automediaembed\n */\n\nimport MediaEmbedEditing from './mediaembedediting';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport LiveRange from '@ckeditor/ckeditor5-engine/src/model/liverange';\nimport LivePosition from '@ckeditor/ckeditor5-engine/src/model/liveposition';\nimport Undo from '@ckeditor/ckeditor5-undo/src/undo';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport { insertMedia } from './utils';\n\nconst URL_REGEXP = /^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w.-]+)+[\\w\\-._~:/?#[\\]@!$&'()*+,;=]+$/;\n\n/**\n * The auto-media embed plugin. It recognizes media links in the pasted content and embeds\n * them shortly after they are injected into the document.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class AutoMediaEmbed extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard, Undo ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'AutoMediaEmbed';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The paste–to–embed `setTimeout` ID. Stored as a property to allow\n\t\t * cleaning of the timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_timeoutId\n\t\t */\n\t\tthis._timeoutId = null;\n\n\t\t/**\n\t\t * The position where the `<media>` element will be inserted after the timeout,\n\t\t * determined each time the new content is pasted into the document.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition} #_positionToInsert\n\t\t */\n\t\tthis._positionToInsert = null;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst modelDocument = editor.model.document;\n\n\t\t// We need to listen on `Clipboard#inputTransformation` because we need to save positions of selection.\n\t\t// After pasting, the content between those positions will be checked for a URL that could be transformed\n\t\t// into media.\n\t\tthis.listenTo( editor.plugins.get( Clipboard ), 'inputTransformation', () => {\n\t\t\tconst firstRange = modelDocument.selection.getFirstRange();\n\n\t\t\tconst leftLivePosition = LivePosition.fromPosition( firstRange.start );\n\t\t\tleftLivePosition.stickiness = 'toPrevious';\n\n\t\t\tconst rightLivePosition = LivePosition.fromPosition( firstRange.end );\n\t\t\trightLivePosition.stickiness = 'toNext';\n\n\t\t\tmodelDocument.once( 'change:data', () => {\n\t\t\t\tthis._embedMediaBetweenPositions( leftLivePosition, rightLivePosition );\n\n\t\t\t\tleftLivePosition.detach();\n\t\t\t\trightLivePosition.detach();\n\t\t\t}, { priority: 'high' } );\n\t\t} );\n\n\t\teditor.commands.get( 'undo' ).on( 'execute', () => {\n\t\t\tif ( this._timeoutId ) {\n\t\t\t\tglobal.window.clearTimeout( this._timeoutId );\n\t\t\t\tthis._positionToInsert.detach();\n\n\t\t\t\tthis._timeoutId = null;\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Analyzes the part of the document between provided positions in search for a URL representing media.\n\t * When the URL is found, it is automatically converted into media.\n\t *\n\t * @protected\n\t * @param {module:engine/model/liveposition~LivePosition} leftPosition Left position of the selection.\n\t * @param {module:engine/model/liveposition~LivePosition} rightPosition Right position of the selection.\n\t */\n\t_embedMediaBetweenPositions( leftPosition, rightPosition ) {\n\t\tconst editor = this.editor;\n\t\tconst mediaRegistry = editor.plugins.get( MediaEmbedEditing ).registry;\n\t\t// TODO: Use marker instead of LiveRange & LivePositions.\n\t\tconst urlRange = new LiveRange( leftPosition, rightPosition );\n\t\tconst walker = urlRange.getWalker( { ignoreElementEnd: true } );\n\n\t\tlet url = '';\n\n\t\tfor ( const node of walker ) {\n\t\t\tif ( node.item.is( 'textProxy' ) ) {\n\t\t\t\turl += node.item.data;\n\t\t\t}\n\t\t}\n\n\t\turl = url.trim();\n\n\t\t// If the URL does not match to universal URL regexp, let's skip that.\n\t\tif ( !url.match( URL_REGEXP ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If the URL represents a media, let's use it.\n\t\tif ( !mediaRegistry.hasMedia( url ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst mediaEmbedCommand = editor.commands.get( 'mediaEmbed' );\n\n\t\t// Do not anything if media element cannot be inserted at the current position (#47).\n\t\tif ( !mediaEmbedCommand.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Position won't be available in the `setTimeout` function so let's clone it.\n\t\tthis._positionToInsert = LivePosition.fromPosition( leftPosition );\n\n\t\t// This action mustn't be executed if undo was called between pasting and auto-embedding.\n\t\tthis._timeoutId = global.window.setTimeout( () => {\n\t\t\teditor.model.change( writer => {\n\t\t\t\tthis._timeoutId = null;\n\n\t\t\t\twriter.remove( urlRange );\n\n\t\t\t\tlet insertionPosition;\n\n\t\t\t\t// Check if position where the media element should be inserted is still valid.\n\t\t\t\t// Otherwise leave it as undefined to use document.selection - default behavior of model.insertContent().\n\t\t\t\tif ( this._positionToInsert.root.rootName !== '$graveyard' ) {\n\t\t\t\t\tinsertionPosition = this._positionToInsert;\n\t\t\t\t}\n\n\t\t\t\tinsertMedia( editor.model, url, insertionPosition );\n\n\t\t\t\tthis._positionToInsert.detach();\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t} );\n\t\t}, 100 );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/ui/mediaformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../theme/mediaform.css';\n/**\n * The media form view controller class.\n *\n * See {@link module:media-embed/ui/mediaformview~MediaFormView}.\n *\n * @extends module:ui/view~View\n */\nexport default class MediaFormView extends View {\n /**\n\t * @param {Array.<Function>} validators Form validators used by {@link #isValid}.\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n constructor(validators, locale) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The URL input view.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t\t */\n this.urlInputView = this._createUrlInput();\n /**\n\t\t * The Save button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * The Cancel button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of views that can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n /**\n\t\t * An array of form validators used by {@link #isValid}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Array.<Function>}\n\t\t */\n this._validators = validators;\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: [\n 'ck',\n 'ck-media-form'\n ],\n tabindex: '-1'\n },\n children: [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ]\n }); /**\n\t\t * The default info text for the {@link #urlInputView}.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoDefault\n\t\t */\n /**\n\t\t * The info text with an additional tip for the {@link #urlInputView},\n\t\t * displayed when the input has some value.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoTip\n\t\t */\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n submitHandler({ view: this });\n const childViews = [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n const stopPropagation = data => data.stopPropagation();\n // Since the form is in the dropdown panel which is a child of the toolbar, the toolbar's\n // keystroke handler would take over the key management in the URL input. We need to prevent\n // this ASAP. Otherwise, the basic caret movement using the arrow keys will be impossible.\n this.keystrokes.set('arrowright', stopPropagation);\n this.keystrokes.set('arrowleft', stopPropagation);\n this.keystrokes.set('arrowup', stopPropagation);\n this.keystrokes.set('arrowdown', stopPropagation);\n // Intercept the \"selectstart\" event, which is blocked by default because of the default behavior\n // of the DropdownView#panelView.\n // TODO: blocking \"selectstart\" in the #panelView should be configurable per–drop–down instance.\n this.listenTo(this.urlInputView.element, 'selectstart', (evt, domEvt) => {\n domEvt.stopPropagation();\n }, { priority: 'high' });\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the form.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * The native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @type {Number}\n\t */\n get url() {\n return this.urlInputView.inputView.element.value.trim();\n }\n /**\n\t * Sets the native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @param {String} url\n\t */\n set url(url) {\n this.urlInputView.inputView.element.value = url.trim();\n }\n /**\n\t * Validates the form and returns `false` when some fields are invalid.\n\t *\n\t * @returns {Boolean}\n\t */\n isValid() {\n this.resetFormStatus();\n for (const validator of this._validators) {\n const errorText = validator(this);\n // One error per field is enough.\n if (errorText) {\n // Apply updated error.\n this.urlInputView.errorText = errorText;\n return false;\n }\n }\n return true;\n }\n /**\n\t * Cleans up the supplementary error and information text of the {@link #urlInputView}\n\t * bringing them back to the state when the form has been displayed for the first time.\n\t *\n\t * See {@link #isValid}.\n\t */\n resetFormStatus() {\n this.urlInputView.errorText = null;\n this.urlInputView.infoText = this._urlInputViewInfoDefault;\n }\n /**\n\t * Creates a labeled input view.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView} Labeled input view instance.\n\t */\n _createUrlInput() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n const inputView = labeledInput.inputView;\n this._urlInputViewInfoDefault = t('bh');\n this._urlInputViewInfoTip = t('bi');\n labeledInput.label = t('bj');\n labeledInput.infoText = this._urlInputViewInfoDefault;\n inputView.placeholder = 'https://example.com';\n inputView.on('input', () => {\n // Display the tip text only when there's some value. Otherwise fall back to the default info text.\n labeledInput.infoText = inputView.element.value ? this._urlInputViewInfoTip : this._urlInputViewInfoDefault;\n });\n return labeledInput;\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n} /**\n * Fired when the form view is submitted (when one of the children triggered the submit event),\n * e.g. click on {@link #saveButtonView}.\n *\n * @event submit\n */\n /**\n * Fired when the form view is canceled, e.g. click on {@link #cancelButtonView}.\n *\n * @event cancel\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/mediaembedui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { createDropdown } from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport MediaFormView from './ui/mediaformview';\nimport MediaEmbedEditing from './mediaembedediting';\nimport mediaIcon from '../theme/icons/media.svg';\n/**\n * The media embed UI plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbedUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [MediaEmbedEditing];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'MediaEmbedUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const command = editor.commands.get('mediaEmbed');\n const registry = editor.plugins.get(MediaEmbedEditing).registry;\n /**\n\t\t * The form view displayed inside the drop-down.\n\t\t *\n\t\t * @member {module:media-embed/ui/mediaformview~MediaFormView}\n\t\t */\n this.form = new MediaFormView(getFormValidators(editor.t, registry), editor.locale);\n // Setup `imageUpload` button.\n editor.ui.componentFactory.add('mediaEmbed', locale => {\n const dropdown = createDropdown(locale);\n this._setUpDropdown(dropdown, this.form, command, editor);\n this._setUpForm(this.form, dropdown, command);\n return dropdown;\n });\n }\n _setUpDropdown(dropdown, form, command) {\n const editor = this.editor;\n const t = editor.t;\n const button = dropdown.buttonView;\n dropdown.bind('isEnabled').to(command);\n dropdown.panelView.children.add(form);\n button.set({\n label: t('ao'),\n icon: mediaIcon,\n tooltip: true\n });\n // Note: Use the low priority to make sure the following listener starts working after the\n // default action of the drop-down is executed (i.e. the panel showed up). Otherwise, the\n // invisible form/input cannot be focused/selected.\n button.on('open', () => {\n // Make sure that each time the panel shows up, the URL field remains in sync with the value of\n // the command. If the user typed in the input, then canceled (`urlInputView#value` stays\n // unaltered) and re-opened it without changing the value of the media command (e.g. because they\n // didn't change the selection), they would see the old value instead of the actual value of the\n // command.\n form.url = command.value || '';\n form.urlInputView.select();\n form.focus();\n }, { priority: 'low' });\n dropdown.on('submit', () => {\n if (form.isValid()) {\n editor.execute('mediaEmbed', form.url);\n closeUI();\n }\n });\n dropdown.on('change:isOpen', () => form.resetFormStatus());\n dropdown.on('cancel', () => closeUI());\n function closeUI() {\n editor.editing.view.focus();\n dropdown.isOpen = false;\n }\n }\n _setUpForm(form, dropdown, command) {\n form.delegate('submit', 'cancel').to(dropdown);\n form.urlInputView.bind('value').to(command, 'value');\n // Form elements should be read-only when corresponding commands are disabled.\n form.urlInputView.bind('isReadOnly').to(command, 'isEnabled', value => !value);\n form.saveButtonView.bind('isEnabled').to(command);\n }\n}\nfunction getFormValidators(t, registry) {\n return [\n form => {\n if (!form.url.length) {\n return t('ap');\n }\n },\n form => {\n if (!registry.hasMedia(form.url)) {\n return t('aq');\n }\n }\n ];\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M18.68 2.53c.6 0 .59-.03.59.55v12.84c0 .59.01.56-.59.56H1.29c-.6 0-.59.03-.59-.56V3.08c0-.58-.01-.55.6-.55h17.38zM15.77 14.5v-10H4.2v10h11.57zM2 4v1h1V4H2zm0 2v1h1V6H2zm0 2v1h1V8H2zm0 2v1h1v-1H2zm0 2v1h1v-1H2zm0 2v1h1v-1H2zM17 4v1h1V4h-1zm0 2v1h1V6h-1zm0 2v1h1V8h-1zm0 2v1h1v-1h-1zm0 2v1h1v-1h-1zm0 2v1h1v-1h-1zM7.5 6.677a.4.4 0 0 1 .593-.351l5.133 2.824a.4.4 0 0 1 0 .7l-5.133 2.824a.4.4 0 0 1-.593-.35V6.676z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/list\n */\n\nimport Element from '@ckeditor/ckeditor5-engine/src/view/element';\nimport Matcher from '@ckeditor/ckeditor5-engine/src/view/matcher';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\n/**\n * Transforms Word specific list-like elements to the semantic HTML lists.\n *\n * Lists in Word are represented by block elements with special attributes like:\n *\n *\t\t<p class=MsoListParagraphCxSpFirst style='mso-list:l1 level1 lfo1'>...</p> // Paragraph based list.\n *\t\t<h1 style='mso-list:l0 level1 lfo1'>...</h1> // Heading 1 based list.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment The view structure which to transform.\n * @param {String} stylesString Styles from which list-like elements styling will be extracted.\n */\nexport function transformListItemLikeElementsIntoLists( documentFragment, stylesString ) {\n\tif ( !documentFragment.childCount ) {\n\t\treturn;\n\t}\n\n\tconst writer = new UpcastWriter();\n\tconst itemLikeElements = findAllItemLikeElements( documentFragment, writer );\n\n\tif ( !itemLikeElements.length ) {\n\t\treturn;\n\t}\n\n\tlet currentList = null;\n\n\titemLikeElements.forEach( ( itemLikeElement, i ) => {\n\t\tif ( !currentList || isNewListNeeded( itemLikeElements[ i - 1 ], itemLikeElement ) ) {\n\t\t\tconst listStyle = detectListStyle( itemLikeElement, stylesString );\n\n\t\t\tcurrentList = insertNewEmptyList( listStyle, itemLikeElement.element, writer );\n\t\t}\n\n\t\tconst listItem = transformElementIntoListItem( itemLikeElement.element, writer );\n\n\t\twriter.appendChild( listItem, currentList );\n\t} );\n}\n\n/**\n * Removes paragraph wrapping content inside a list item.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport function unwrapParagraphInListItem( documentFragment, writer ) {\n\tfor ( const value of writer.createRangeIn( documentFragment ) ) {\n\t\tconst element = value.item;\n\n\t\tif ( element.is( 'li' ) ) {\n\t\t\t// Google Docs allows on single paragraph inside LI.\n\t\t\tconst firstChild = element.getChild( 0 );\n\n\t\t\tif ( firstChild.is( 'p' ) ) {\n\t\t\t\twriter.unwrapElement( firstChild );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Finds all list-like elements in a given document fragment.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment\n// in which to look for list-like nodes.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Array.<Object>} Array of found list-like items. Each item is an object containing:\n//\n//\t\t* {module:engine/src/view/element~Element} element List-like element.\n//\t\t* {Number} id List item id parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} order List item creation order parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} indent List item indentation level parsed from `mso-list` style (see `getListItemData()` function).\nfunction findAllItemLikeElements( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\t// Matcher for finding list-like elements.\n\tconst itemLikeElementsMatcher = new Matcher( {\n\t\tname: /^p|h\\d+$/,\n\t\tstyles: {\n\t\t\t'mso-list': /.*/\n\t\t}\n\t} );\n\n\tconst itemLikeElements = [];\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && itemLikeElementsMatcher.match( value.item ) ) {\n\t\t\tconst itemData = getListItemData( value.item );\n\n\t\t\titemLikeElements.push( {\n\t\t\t\telement: value.item,\n\t\t\t\tid: itemData.id,\n\t\t\t\torder: itemData.order,\n\t\t\t\tindent: itemData.indent\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn itemLikeElements;\n}\n\n// Extracts list item style from the provided CSS.\n//\n// List item style is extracted from CSS stylesheet. Each list with its specific style attribute\n// value (`mso-list:l1 level1 lfo1`) has its dedicated properties in a CSS stylesheet defined with a selector like:\n//\n// \t\t@list l1:level1 { ... }\n//\n// It contains `mso-level-number-format` property which defines list numbering/bullet style. If this property\n// is not defined it means default `decimal` numbering.\n//\n// Here CSS string representation is used as `mso-level-number-format` property is an invalid CSS property\n// and will be removed during CSS parsing.\n//\n// @param {Object} listLikeItem List-like item for which list style will be searched for. Usually\n// a result of `findAllItemLikeElements()` function.\n// @param {String} stylesString CSS stylesheet.\n// @returns {Object} result\n// @returns {String} result.type List type, could be `ul` or `ol`.\n// @returns {String} result.style List style, for example: `decimal`, `lower-roman`, etc. It is extracted\n// directly from Word stylesheet without further processing and may be not compatible\n// with CSS `list-style-type` property accepted values.\nfunction detectListStyle( listLikeItem, stylesString ) {\n\tconst listStyleRegexp = new RegExp( `@list l${ listLikeItem.id }:level${ listLikeItem.indent }\\\\s*({[^}]*)`, 'gi' );\n\tconst listStyleTypeRegex = /mso-level-number-format:([^;]*);/gi;\n\n\tconst listStyleMatch = listStyleRegexp.exec( stylesString );\n\n\tlet listStyleType = 'decimal'; // Decimal is default one.\n\tif ( listStyleMatch && listStyleMatch[ 1 ] ) {\n\t\tconst listStyleTypeMatch = listStyleTypeRegex.exec( listStyleMatch[ 1 ] );\n\n\t\tif ( listStyleTypeMatch && listStyleTypeMatch[ 1 ] ) {\n\t\t\tlistStyleType = listStyleTypeMatch[ 1 ].trim();\n\t\t}\n\t}\n\n\treturn {\n\t\ttype: listStyleType !== 'bullet' && listStyleType !== 'image' ? 'ol' : 'ul',\n\t\tstyle: listStyleType\n\t};\n}\n\n// Creates empty list of a given type and inserts it after a specified element.\n//\n// @param {Object} listStyle List style object which determines the type of newly created list.\n// Usually a result of `detectListStyle()` function.\n// @param {module:engine/view/element~Element} element Element before which list is inserted.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} Newly created list element.\nfunction insertNewEmptyList( listStyle, element, writer ) {\n\tconst list = new Element( listStyle.type );\n\tconst position = element.parent.getChildIndex( element );\n\n\twriter.insertChild( position, list, element.parent );\n\n\treturn list;\n}\n\n// Transforms given element into a semantic list item. As the function operates on a provided\n// {module:engine/src/view/element~Element element} it will modify the view structure to which this element belongs.\n//\n// @param {module:engine/view/element~Element} element Element which will be transformed into list item.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} New element to which the given one was transformed. It is\n// inserted in place of the old element (the reference to the old element is lost due to renaming).\nfunction transformElementIntoListItem( element, writer ) {\n\tremoveBulletElement( element, writer );\n\n\treturn writer.rename( 'li', element );\n}\n\n// Extracts list item information from Word specific list-like element style:\n//\n//\t\t`style=\"mso-list:l1 level1 lfo1\"`\n//\n// where:\n//\n//\t\t* `l1` is a list id (however it does not mean this is a continuous list - see #43),\n//\t\t* `level1` is a list item indentation level,\n//\t\t* `lfo1` is a list insertion order in a document.\n//\n// @param {module:engine/view/element~Element} element Element from which style data is extracted.\n// @returns {Object} result\n// @returns {Number} result.id Parent list id.\n// @returns {Number} result.order List item creation order.\n// @returns {Number} result.indent List item indentation level.\nfunction getListItemData( element ) {\n\tconst data = {};\n\tconst listStyle = element.getStyle( 'mso-list' );\n\n\tif ( listStyle ) {\n\t\tconst idMatch = listStyle.match( /(^|\\s+)l(\\d+)/i );\n\t\tconst orderMatch = listStyle.match( /\\s*lfo(\\d+)/i );\n\t\tconst indentMatch = listStyle.match( /\\s*level(\\d+)/i );\n\n\t\tif ( idMatch && orderMatch && indentMatch ) {\n\t\t\tdata.id = idMatch[ 2 ];\n\t\t\tdata.order = orderMatch[ 1 ];\n\t\t\tdata.indent = indentMatch[ 1 ];\n\t\t}\n\t}\n\n\treturn data;\n}\n\n// Removes span with a numbering/bullet from a given element.\n//\n// @param {module:engine/view/element~Element} element\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeBulletElement( element, writer ) {\n\t// Matcher for finding `span` elements holding lists numbering/bullets.\n\tconst bulletMatcher = new Matcher( {\n\t\tname: 'span',\n\t\tstyles: {\n\t\t\t'mso-list': 'Ignore'\n\t\t}\n\t} );\n\n\tconst range = writer.createRangeIn( element );\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && bulletMatcher.match( value.item ) ) {\n\t\t\twriter.remove( value.item );\n\t\t}\n\t}\n}\n\n// Whether previous and current item belongs to the same list. It is determined based on `item.id`\n// (extracted from `mso-list` style, see #getListItemData) and previous sibling of the current item.\n//\n// @param {Object} previousItem\n// @param {Object} currentItem\n// @returns {Boolean}\nfunction isNewListNeeded( previousItem, currentItem ) {\n\tif ( previousItem.id !== currentItem.id ) {\n\t\treturn true;\n\t}\n\n\tconst previousSibling = currentItem.element.previousSibling;\n\n\tif ( !previousSibling ) {\n\t\treturn true;\n\t}\n\n\t// Even with the same id the list does not have to be continuous (#43).\n\treturn !isList( previousSibling );\n}\n\nfunction isList( element ) {\n\treturn element.is( 'ol' ) || element.is( 'ul' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/normalizers/googledocsnormalizer\n */\n\nimport removeBoldWrapper from '../filters/removeboldwrapper';\nimport { unwrapParagraphInListItem } from '../filters/list';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\nconst googleDocsMatch = /id=(\"|')docs-internal-guid-[-0-9a-f]+(\"|')/i;\n\n/**\n * Normalizer for the content pasted from Google Docs.\n *\n * @implements module:paste-from-office/normalizer~Normalizer\n */\nexport default class GoogleDocsNormalizer {\n\t/**\n\t * @inheritDoc\n\t */\n\tisActive( htmlString ) {\n\t\treturn googleDocsMatch.test( htmlString );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute( data ) {\n\t\tconst writer = new UpcastWriter();\n\n\t\tremoveBoldWrapper( data.content, writer );\n\t\tunwrapParagraphInListItem( data.content, writer );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/removeboldwrapper\n */\n\n/**\n * Removes `<b>` tag wrapper added by Google Docs to a copied content.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment element `data.content` obtained from clipboard\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport default function removeBoldWrapper( documentFragment, writer ) {\n\tfor ( const child of documentFragment.getChildren() ) {\n\t\tif ( child.is( 'b' ) && child.getStyle( 'font-weight' ) === 'normal' ) {\n\t\t\tconst childIndex = documentFragment.getChildIndex( child );\n\n\t\t\twriter.remove( child );\n\t\t\twriter.insertChild( childIndex, child.getChildren(), documentFragment );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/space\n */\n\n/**\n * Replaces last space preceding elements closing tag with ` `. Such operation prevents spaces from being removed\n * during further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n * This method also takes into account Word specific `<o:p></o:p>` empty tags.\n * Additionally multiline sequences of spaces and new lines between tags are removed (see #39 and #40).\n *\n * @param {String} htmlString HTML string in which spacing should be normalized.\n * @returns {String} Input HTML with spaces normalized.\n */\nexport function normalizeSpacing( htmlString ) {\n\t// Run normalizeSafariSpaceSpans() two times to cover nested spans.\n\treturn normalizeSafariSpaceSpans( normalizeSafariSpaceSpans( htmlString ) )\n\t\t// Remove all \\r\\n from \"spacerun spans\" so the last replace line doesn't strip all whitespaces.\n\t\t.replace( /(<span\\s+style=['\"]mso-spacerun:yes['\"]>[\\s]*?)[\\r\\n]+(\\s*<\\/span>)/g, '$1$2' )\n\t\t.replace( /<span\\s+style=['\"]mso-spacerun:yes['\"]><\\/span>/g, '' )\n\t\t.replace( / <\\//g, '\\u00A0</' )\n\t\t.replace( / <o:p><\\/o:p>/g, '\\u00A0<o:p></o:p>' )\n\t\t// Remove <o:p> block filler from empty paragraph. Safari uses \\u00A0 instead of  .\n\t\t.replace( /<o:p>( |\\u00A0)<\\/o:p>/g, '' )\n\t\t// Remove all whitespaces when they contain any \\r or \\n.\n\t\t.replace( />(\\s*[\\r\\n]\\s*)</g, '><' );\n}\n\n/**\n * Normalizes spacing in special Word `spacerun spans` (`<span style='mso-spacerun:yes'>\\s+</span>`) by replacing\n * all spaces with `  ` pairs. This prevents spaces from being removed during further DOM/View processing\n * (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n *\n * @param {Document} htmlDocument Native `Document` object in which spacing should be normalized.\n */\nexport function normalizeSpacerunSpans( htmlDocument ) {\n\thtmlDocument.querySelectorAll( 'span[style*=spacerun]' ).forEach( el => {\n\t\t// Use `el.childNodes[ 0 ].data.length` instead of `el.innerText.length`. For `el.innerText.length` which\n\t\t// contains spaces mixed with ` ` Edge browser returns incorrect length.\n\t\tconst innerTextLength = ( el.childNodes &&\n\t\t\tel.childNodes[ 0 ] &&\n\t\t\tel.childNodes[ 0 ].data &&\n\t\t\tel.childNodes[ 0 ].data.length ) || 0;\n\n\t\tel.innerHTML = Array( innerTextLength + 1 ).join( '\\u00A0 ' ).substr( 0, innerTextLength );\n\t} );\n}\n\n// Normalizes specific spacing generated by Safari when content pasted from Word (`<span class=\"Apple-converted-space\"> </span>`)\n// by replacing all spaces sequences longer than 1 space with `  ` pairs. This prevents spaces from being removed during\n// further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n//\n// This function is similar to {@link module:clipboard/utils/normalizeclipboarddata normalizeClipboardData util} but uses\n// regular spaces /   sequence for replacement.\n//\n// @param {String} htmlString HTML string in which spacing should be normalized\n// @returns {String} Input HTML with spaces normalized.\nfunction normalizeSafariSpaceSpans( htmlString ) {\n\treturn htmlString.replace( /<span(?: class=\"Apple-converted-space\"|)>(\\s+)<\\/span>/g, ( fullMatch, spaces ) => {\n\t\treturn spaces.length === 1 ? ' ' : Array( spaces.length + 1 ).join( '\\u00A0 ' ).substr( 0, spaces.length );\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/normalizers/mswordnormalizer\n */\n\nimport { parseHtml } from '../filters/parse';\nimport { transformListItemLikeElementsIntoLists } from '../filters/list';\nimport { replaceImagesSourceWithBase64 } from '../filters/image';\n\nconst msWordMatch1 = /<meta\\s*name=\"?generator\"?\\s*content=\"?microsoft\\s*word\\s*\\d+\"?\\/?>/i;\nconst msWordMatch2 = /xmlns:o=\"urn:schemas-microsoft-com/i;\n\n/**\n * Normalizer for the content pasted from Microsoft Word.\n *\n * @implements module:paste-from-office/normalizer~Normalizer\n */\nexport default class MSWordNormalizer {\n\t/**\n\t * @inheritDoc\n\t */\n\tisActive( htmlString ) {\n\t\treturn msWordMatch1.test( htmlString ) || msWordMatch2.test( htmlString );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute( data ) {\n\t\tconst { body, stylesString } = parseHtml( data.dataTransfer.getData( 'text/html' ) );\n\n\t\ttransformListItemLikeElementsIntoLists( body, stylesString );\n\t\treplaceImagesSourceWithBase64( body, data.dataTransfer.getData( 'text/rtf' ) );\n\n\t\tdata.content = body;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/parse\n */\n\n/* globals DOMParser */\n\nimport DomConverter from '@ckeditor/ckeditor5-engine/src/view/domconverter';\n\nimport { normalizeSpacing, normalizeSpacerunSpans } from './space';\n\n/**\n * Parses provided HTML extracting contents of `<body>` and `<style>` tags.\n *\n * @param {String} htmlString HTML string to be parsed.\n * @returns {Object} result\n * @returns {module:engine/view/documentfragment~DocumentFragment} result.body Parsed body\n * content as a traversable structure.\n * @returns {String} result.bodyString Entire body content as a string.\n * @returns {Array.<CSSStyleSheet>} result.styles Array of native `CSSStyleSheet` objects, each representing\n * separate `style` tag from the source HTML.\n * @returns {String} result.stylesString All `style` tags contents combined in the order of occurrence into one string.\n */\nexport function parseHtml( htmlString ) {\n\tconst domParser = new DOMParser();\n\n\t// Remove Word specific \"if comments\" so content inside is not omitted by the parser.\n\thtmlString = htmlString.replace( /<!--\\[if gte vml 1]>/g, '' );\n\n\tconst normalizedHtml = normalizeSpacing( cleanContentAfterBody( htmlString ) );\n\n\t// Parse htmlString as native Document object.\n\tconst htmlDocument = domParser.parseFromString( normalizedHtml, 'text/html' );\n\n\tnormalizeSpacerunSpans( htmlDocument );\n\n\t// Get `innerHTML` first as transforming to View modifies the source document.\n\tconst bodyString = htmlDocument.body.innerHTML;\n\n\t// Transform document.body to View.\n\tconst bodyView = documentToView( htmlDocument );\n\n\t// Extract stylesheets.\n\tconst stylesObject = extractStyles( htmlDocument );\n\n\treturn {\n\t\tbody: bodyView,\n\t\tbodyString,\n\t\tstyles: stylesObject.styles,\n\t\tstylesString: stylesObject.stylesString\n\t};\n}\n\n// Transforms native `Document` object into {@link module:engine/view/documentfragment~DocumentFragment}.\n//\n// @param {Document} htmlDocument Native `Document` object to be transformed.\n// @returns {module:engine/view/documentfragment~DocumentFragment}\nfunction documentToView( htmlDocument ) {\n\tconst domConverter = new DomConverter( { blockFillerMode: 'nbsp' } );\n\tconst fragment = htmlDocument.createDocumentFragment();\n\tconst nodes = htmlDocument.body.childNodes;\n\n\twhile ( nodes.length > 0 ) {\n\t\tfragment.appendChild( nodes[ 0 ] );\n\t}\n\n\treturn domConverter.domToView( fragment );\n}\n\n// Extracts both `CSSStyleSheet` and string representation from all `style` elements available in a provided `htmlDocument`.\n//\n// @param {Document} htmlDocument Native `Document` object from which styles will be extracted.\n// @returns {Object} result\n// @returns {Array.<CSSStyleSheet>} result.styles Array of native `CSSStyleSheet` object, each representing\n// separate `style` tag from the source object.\n// @returns {String} result.stylesString All `style` tags contents combined in the order of occurrence as one string.\nfunction extractStyles( htmlDocument ) {\n\tconst styles = [];\n\tconst stylesString = [];\n\tconst styleTags = Array.from( htmlDocument.getElementsByTagName( 'style' ) );\n\n\tfor ( const style of styleTags ) {\n\t\tif ( style.sheet && style.sheet.cssRules && style.sheet.cssRules.length ) {\n\t\t\tstyles.push( style.sheet );\n\t\t\tstylesString.push( style.innerHTML );\n\t\t}\n\t}\n\n\treturn {\n\t\tstyles,\n\t\tstylesString: stylesString.join( ' ' )\n\t};\n}\n\n// Removes leftover content from between closing </body> and closing </html> tag:\n//\n// \t\t<html><body><p>Foo Bar</p></body><span>Fo</span></html> -> <html><body><p>Foo Bar</p></body></html>\n//\n// This function is used as specific browsers (Edge) add some random content after `body` tag when pasting from Word.\n// @param {String} htmlString The HTML string to be cleaned.\n// @returns {String} The HTML string with leftover content removed.\nfunction cleanContentAfterBody( htmlString ) {\n\tconst regexp = /<\\/body>(.*?)(<\\/html>|$)/;\n\tconst match = htmlString.match( regexp );\n\n\tif ( match && match[ 1 ] ) {\n\t\thtmlString = htmlString.slice( 0, match.index ) + htmlString.slice( match.index ).replace( match[ 1 ], '' );\n\t}\n\n\treturn htmlString;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/image\n */\n\n/* globals btoa */\n\nimport ViewMatcher from '@ckeditor/ckeditor5-engine/src/view/matcher';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\n/**\n * Replaces source attribute of all `<img>` elements representing regular\n * images (not the Word shapes) with inlined base64 image representation extracted from RTF or Blob data.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment on which transform images.\n * @param {String} rtfData The RTF data from which images representation will be used.\n */\nexport function replaceImagesSourceWithBase64( documentFragment, rtfData ) {\n\tif ( !documentFragment.childCount ) {\n\t\treturn;\n\t}\n\n\tconst upcastWriter = new UpcastWriter();\n\tconst shapesIds = findAllShapesIds( documentFragment, upcastWriter );\n\n\tremoveAllImgElementsRepresentingShapes( shapesIds, documentFragment, upcastWriter );\n\tremoveAllShapeElements( documentFragment, upcastWriter );\n\n\tconst images = findAllImageElementsWithLocalSource( documentFragment, upcastWriter );\n\n\tif ( images.length ) {\n\t\treplaceImagesFileSourceWithInlineRepresentation( images, extractImageDataFromRtf( rtfData ), upcastWriter );\n\t}\n}\n\n/**\n * Converts given HEX string to base64 representation.\n *\n * @protected\n * @param {String} hexString The HEX string to be converted.\n * @returns {String} Base64 representation of a given HEX string.\n */\nexport function _convertHexToBase64( hexString ) {\n\treturn btoa( hexString.match( /\\w{2}/g ).map( char => {\n\t\treturn String.fromCharCode( parseInt( char, 16 ) );\n\t} ).join( '' ) );\n}\n\n// Finds all shapes (`<v:*>...</v:*>`) ids. Shapes can represent images (canvas)\n// or Word shapes (which does not have RTF or Blob representation).\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment\n// from which to extract shape ids.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Array.<String>} Array of shape ids.\nfunction findAllShapesIds( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst shapeElementsMatcher = new ViewMatcher( {\n\t\tname: /v:(.+)/\n\t} );\n\n\tconst shapesIds = [];\n\n\tfor ( const value of range ) {\n\t\tconst el = value.item;\n\t\tconst prevSiblingName = el.previousSibling && el.previousSibling.name || null;\n\n\t\t// If shape element have 'o:gfxdata' attribute and is not directly before `<v:shapetype>` element it means it represent Word shape.\n\t\tif ( shapeElementsMatcher.match( el ) && el.getAttribute( 'o:gfxdata' ) && prevSiblingName !== 'v:shapetype' ) {\n\t\t\tshapesIds.push( value.item.getAttribute( 'id' ) );\n\t\t}\n\t}\n\n\treturn shapesIds;\n}\n\n// Removes all `<img>` elements which represents Word shapes and not regular images.\n//\n// @param {Array.<String>} shapesIds Shape ids which will be checked against `<img>` elements.\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment from which to remove `<img>` elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeAllImgElementsRepresentingShapes( shapesIds, documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst imageElementsMatcher = new ViewMatcher( {\n\t\tname: 'img'\n\t} );\n\n\tconst imgs = [];\n\n\tfor ( const value of range ) {\n\t\tif ( imageElementsMatcher.match( value.item ) ) {\n\t\t\tconst el = value.item;\n\t\t\tconst shapes = el.getAttribute( 'v:shapes' ) ? el.getAttribute( 'v:shapes' ).split( ' ' ) : [];\n\n\t\t\tif ( shapes.length && shapes.every( shape => shapesIds.indexOf( shape ) > -1 ) ) {\n\t\t\t\timgs.push( el );\n\t\t\t// Shapes may also have empty source while content is paste in some browsers (Safari).\n\t\t\t} else if ( !el.getAttribute( 'src' ) ) {\n\t\t\t\timgs.push( el );\n\t\t\t}\n\t\t}\n\t}\n\n\tfor ( const img of imgs ) {\n\t\twriter.remove( img );\n\t}\n}\n\n// Removes all shape elements (`<v:*>...</v:*>`) so they do not pollute the output structure.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment from which to remove shape elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeAllShapeElements( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst shapeElementsMatcher = new ViewMatcher( {\n\t\tname: /v:(.+)/\n\t} );\n\n\tconst shapes = [];\n\n\tfor ( const value of range ) {\n\t\tif ( shapeElementsMatcher.match( value.item ) ) {\n\t\t\tshapes.push( value.item );\n\t\t}\n\t}\n\n\tfor ( const shape of shapes ) {\n\t\twriter.remove( shape );\n\t}\n}\n\n// Finds all `<img>` elements in a given document fragment which have source pointing to local `file://` resource.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment in which to look for `<img>` elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Object} result All found images grouped by source type.\n// @returns {Array.<module:engine/view/element~Element>} result.file Array of found `<img>` elements with `file://` source.\n// @returns {Array.<module:engine/view/element~Element>} result.blob Array of found `<img>` elements with `blob:` source.\nfunction findAllImageElementsWithLocalSource( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst imageElementsMatcher = new ViewMatcher( {\n\t\tname: 'img'\n\t} );\n\n\tconst imgs = [];\n\n\tfor ( const value of range ) {\n\t\tif ( imageElementsMatcher.match( value.item ) ) {\n\t\t\tif ( value.item.getAttribute( 'src' ).startsWith( 'file://' ) ) {\n\t\t\t\timgs.push( value.item );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn imgs;\n}\n\n// Extracts all images HEX representations from a given RTF data.\n//\n// @param {String} rtfData The RTF data from which to extract images HEX representation.\n// @returns {Array.<Object>} Array of found HEX representations. Each array item is an object containing:\n//\n// \t\t* {String} hex Image representation in HEX format.\n// \t\t* {string} type Type of image, `image/png` or `image/jpeg`.\nfunction extractImageDataFromRtf( rtfData ) {\n\tif ( !rtfData ) {\n\t\treturn [];\n\t}\n\n\tconst regexPictureHeader = /{\\\\pict[\\s\\S]+?\\\\bliptag-?\\d+(\\\\blipupi-?\\d+)?({\\\\\\*\\\\blipuid\\s?[\\da-fA-F]+)?[\\s}]*?/;\n\tconst regexPicture = new RegExp( '(?:(' + regexPictureHeader.source + '))([\\\\da-fA-F\\\\s]+)\\\\}', 'g' );\n\tconst images = rtfData.match( regexPicture );\n\tconst result = [];\n\n\tif ( images ) {\n\t\tfor ( const image of images ) {\n\t\t\tlet imageType = false;\n\n\t\t\tif ( image.includes( '\\\\pngblip' ) ) {\n\t\t\t\timageType = 'image/png';\n\t\t\t} else if ( image.includes( '\\\\jpegblip' ) ) {\n\t\t\t\timageType = 'image/jpeg';\n\t\t\t}\n\n\t\t\tif ( imageType ) {\n\t\t\t\tresult.push( {\n\t\t\t\t\thex: image.replace( regexPictureHeader, '' ).replace( /[^\\da-fA-F]/g, '' ),\n\t\t\t\t\ttype: imageType\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn result;\n}\n\n// Replaces `src` attribute value of all given images with the corresponding base64 image representation.\n//\n// @param {Array.<module:engine/view/element~Element>} imageElements Array of image elements which will have its source replaced.\n// @param {Array.<Object>} imagesHexSources Array of images hex sources (usually the result of `extractImageDataFromRtf()` function).\n// The array should be the same length as `imageElements` parameter.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction replaceImagesFileSourceWithInlineRepresentation( imageElements, imagesHexSources, writer ) {\n\t// Assume there is an equal amount of image elements and images HEX sources so they can be matched accordingly based on existing order.\n\tif ( imageElements.length === imagesHexSources.length ) {\n\t\tfor ( let i = 0; i < imageElements.length; i++ ) {\n\t\t\tconst newSrc = `data:${ imagesHexSources[ i ].type };base64,${ _convertHexToBase64( imagesHexSources[ i ].hex ) }`;\n\t\t\twriter.setAttribute( 'src', newSrc, imageElements[ i ] );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/utils\n */\n\n/**\n * Returns the parent element of given name. Returns undefined if position is not inside desired parent.\n *\n * @param {String} parentName Name of parent element to find.\n * @param {module:engine/model/position~Position|module:engine/model/position~Position} position Position to start searching.\n * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n */\nexport function findAncestor( parentName, position ) {\n\tlet parent = position.parent;\n\n\twhile ( parent ) {\n\t\tif ( parent.name === parentName ) {\n\t\t\treturn parent;\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n}\n\n/**\n * A common method to update the numeric value. If a value is the default one, it will be unset.\n *\n * @param {String} key Attribute key.\n * @param {*} value The new attribute value.\n * @param {module:engine/model/item~Item} item Model item on which the attribute will be set.\n * @param {module:engine/model/writer~Writer} writer\n * @param {*} defaultValue Default attribute value. If a value is lower or equal, it will be unset.\n */\nexport function updateNumericAttribute( key, value, item, writer, defaultValue = 1 ) {\n\tif ( value > defaultValue ) {\n\t\twriter.setAttribute( key, value, item );\n\t} else {\n\t\twriter.removeAttribute( key, item );\n\t}\n}\n\n/**\n * Common method to create empty table cell - it will create proper model structure as table cell must have at least one block inside.\n *\n * @param {module:engine/model/writer~Writer} writer Model writer.\n * @param {module:engine/model/position~Position} insertPosition Position at which table cell should be inserted.\n * @param {Object} attributes Element's attributes.\n */\nexport function createEmptyTableCell( writer, insertPosition, attributes = {} ) {\n\tconst tableCell = writer.createElement( 'tableCell', attributes );\n\twriter.insertElement( 'paragraph', tableCell );\n\twriter.insert( tableCell, insertPosition );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/upcasttable\n */\n\nimport { createEmptyTableCell } from '../commands/utils';\n\n/**\n * View table element to model table element conversion helper.\n *\n * This conversion helper converts the table element as well as table rows.\n *\n * @returns {Function} Conversion helper.\n */\nexport default function upcastTable() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element:table', ( evt, data, conversionApi ) => {\n\t\t\tconst viewTable = data.viewItem;\n\n\t\t\t// When element was already consumed then skip it.\n\t\t\tif ( !conversionApi.consumable.test( viewTable, { name: true } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst { rows, headingRows, headingColumns } = scanTable( viewTable );\n\n\t\t\t// Only set attributes if values is greater then 0.\n\t\t\tconst attributes = {};\n\n\t\t\tif ( headingColumns ) {\n\t\t\t\tattributes.headingColumns = headingColumns;\n\t\t\t}\n\n\t\t\tif ( headingRows ) {\n\t\t\t\tattributes.headingRows = headingRows;\n\t\t\t}\n\n\t\t\tconst table = conversionApi.writer.createElement( 'table', attributes );\n\n\t\t\t// Insert element on allowed position.\n\t\t\tconst splitResult = conversionApi.splitToAllowedParent( table, data.modelCursor );\n\n\t\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\t\tif ( !splitResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconversionApi.writer.insert( table, splitResult.position );\n\t\t\tconversionApi.consumable.consume( viewTable, { name: true } );\n\n\t\t\tif ( rows.length ) {\n\t\t\t\t// Upcast table rows in proper order (heading rows first).\n\t\t\t\trows.forEach( row => conversionApi.convertItem( row, conversionApi.writer.createPositionAt( table, 'end' ) ) );\n\t\t\t} else {\n\t\t\t\t// Create one row and one table cell for empty table.\n\t\t\t\tconst row = conversionApi.writer.createElement( 'tableRow' );\n\t\t\t\tconversionApi.writer.insert( row, conversionApi.writer.createPositionAt( table, 'end' ) );\n\n\t\t\t\tcreateEmptyTableCell( conversionApi.writer, conversionApi.writer.createPositionAt( row, 'end' ) );\n\t\t\t}\n\n\t\t\t// Set conversion result range.\n\t\t\tdata.modelRange = conversionApi.writer.createRange(\n\t\t\t\t// Range should start before inserted element\n\t\t\t\tconversionApi.writer.createPositionBefore( table ),\n\t\t\t\t// Should end after but we need to take into consideration that children could split our\n\t\t\t\t// element, so we need to move range after parent of the last converted child.\n\t\t\t\t// before: <allowed>[]</allowed>\n\t\t\t\t// after: <allowed>[<converted><child></child></converted><child></child><converted>]</converted></allowed>\n\t\t\t\tconversionApi.writer.createPositionAfter( table )\n\t\t\t);\n\n\t\t\t// Now we need to check where the modelCursor should be.\n\t\t\t// If we had to split parent to insert our element then we want to continue conversion inside split parent.\n\t\t\t//\n\t\t\t// before: <allowed><notAllowed>[]</notAllowed></allowed>\n\t\t\t// after: <allowed><notAllowed></notAllowed><converted></converted><notAllowed>[]</notAllowed></allowed>\n\t\t\tif ( splitResult.cursorParent ) {\n\t\t\t\tdata.modelCursor = conversionApi.writer.createPositionAt( splitResult.cursorParent, 0 );\n\n\t\t\t\t// Otherwise just continue after inserted element.\n\t\t\t} else {\n\t\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t\t}\n\t\t} );\n\t};\n}\n\nexport function upcastTableCell( elementName ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( `element:${ elementName }`, ( evt, data, conversionApi ) => {\n\t\t\tconst viewTableCell = data.viewItem;\n\n\t\t\t// When element was already consumed then skip it.\n\t\t\tif ( !conversionApi.consumable.test( viewTableCell, { name: true } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst tableCell = conversionApi.writer.createElement( 'tableCell' );\n\n\t\t\t// Insert element on allowed position.\n\t\t\tconst splitResult = conversionApi.splitToAllowedParent( tableCell, data.modelCursor );\n\n\t\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\t\tif ( !splitResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconversionApi.writer.insert( tableCell, splitResult.position );\n\t\t\tconversionApi.consumable.consume( viewTableCell, { name: true } );\n\n\t\t\tconst modelCursor = conversionApi.writer.createPositionAt( tableCell, 0 );\n\t\t\tconversionApi.convertChildren( viewTableCell, modelCursor );\n\n\t\t\t// Ensure a paragraph in the model for empty table cells.\n\t\t\tif ( !tableCell.childCount ) {\n\t\t\t\tconversionApi.writer.insertElement( 'paragraph', modelCursor );\n\t\t\t}\n\n\t\t\t// Set conversion result range.\n\t\t\tdata.modelRange = conversionApi.writer.createRange(\n\t\t\t\t// Range should start before inserted element\n\t\t\t\tconversionApi.writer.createPositionBefore( tableCell ),\n\t\t\t\t// Should end after but we need to take into consideration that children could split our\n\t\t\t\t// element, so we need to move range after parent of the last converted child.\n\t\t\t\t// before: <allowed>[]</allowed>\n\t\t\t\t// after: <allowed>[<converted><child></child></converted><child></child><converted>]</converted></allowed>\n\t\t\t\tconversionApi.writer.createPositionAfter( tableCell )\n\t\t\t);\n\n\t\t\t// Continue after inserted element.\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t} );\n\t};\n}\n\n// Scans table rows and extracts required metadata from the table:\n//\n// headingRows - the number of rows that goes as table header.\n// headingColumns - max number of row headings.\n// rows - sorted `<tr>`s as they should go into the model - ie. if `<thead>` is inserted after `<tbody>` in the view.\n//\n// @param {module:engine/view/element~Element} viewTable\n// @returns {{headingRows, headingColumns, rows}}\nfunction scanTable( viewTable ) {\n\tconst tableMeta = {\n\t\theadingRows: 0,\n\t\theadingColumns: 0\n\t};\n\n\t// The `<tbody>` and <thead> sections in the DOM do not have to be in order `<thead>` -> `<tbody>` and there might be more then one of\n\t// them.\n\t// As the model does not have those sections, rows from different sections must be sorted.\n\t// For example, below is a valid HTML table:\n\t//\n\t//\t\t<table>\n\t//\t\t\t<tbody><tr><td>2</td></tr></tbody>\n\t//\t\t\t<thead><tr><td>1</td></tr></thead>\n\t//\t\t\t<tbody><tr><td>3</td></tr></tbody>\n\t//\t\t</table>\n\t//\n\t// But browsers will render rows in order as: 1 as heading and 2 and 3 as (body).\n\tconst headRows = [];\n\tconst bodyRows = [];\n\n\t// Currently the editor does not support more then one <thead> section.\n\t// Only the first <thead> from the view will be used as heading rows and others will be converted to body rows.\n\tlet firstTheadElement;\n\n\tfor ( const tableChild of Array.from( viewTable.getChildren() ) ) {\n\t\t// Only <thead>, <tbody> & <tfoot> from allowed table children can have <tr>s.\n\t\t// The else is for future purposes (mainly <caption>).\n\t\tif ( tableChild.name === 'tbody' || tableChild.name === 'thead' || tableChild.name === 'tfoot' ) {\n\t\t\t// Save the first <thead> in the table as table header - all other ones will be converted to table body rows.\n\t\t\tif ( tableChild.name === 'thead' && !firstTheadElement ) {\n\t\t\t\tfirstTheadElement = tableChild;\n\t\t\t}\n\n\t\t\t// There might be some extra empty text nodes between the `tr`s.\n\t\t\t// Make sure further code operates on `tr`s only. (#145)\n\t\t\tconst trs = Array.from( tableChild.getChildren() ).filter( el => el.is( 'element', 'tr' ) );\n\n\t\t\tfor ( const tr of trs ) {\n\t\t\t\t// This <tr> is a child of a first <thead> element.\n\t\t\t\tif ( tr.parent.name === 'thead' && tr.parent === firstTheadElement ) {\n\t\t\t\t\ttableMeta.headingRows++;\n\t\t\t\t\theadRows.push( tr );\n\t\t\t\t} else {\n\t\t\t\t\tbodyRows.push( tr );\n\t\t\t\t\t// For other rows check how many column headings this row has.\n\n\t\t\t\t\tconst headingCols = scanRowForHeadingColumns( tr, tableMeta, firstTheadElement );\n\n\t\t\t\t\tif ( headingCols > tableMeta.headingColumns ) {\n\t\t\t\t\t\ttableMeta.headingColumns = headingCols;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\ttableMeta.rows = [ ...headRows, ...bodyRows ];\n\n\treturn tableMeta;\n}\n\n// Scans `<tr>` and its children for metadata:\n// - For heading row:\n// - either adds this row to heading or body rows.\n// - updates number of heading rows.\n// - For body rows:\n// - calculates the number of column headings.\n//\n// @param {module:engine/view/element~Element} tr\n// @returns {Number}\nfunction scanRowForHeadingColumns( tr ) {\n\tlet headingColumns = 0;\n\tlet index = 0;\n\n\t// Filter out empty text nodes from tr children.\n\tconst children = Array.from( tr.getChildren() )\n\t\t.filter( child => child.name === 'th' || child.name === 'td' );\n\n\t// Count starting adjacent <th> elements of a <tr>.\n\twhile ( index < children.length && children[ index ].name === 'th' ) {\n\t\tconst th = children[ index ];\n\n\t\t// Adjust columns calculation by the number of spanned columns.\n\t\tconst colspan = parseInt( th.getAttribute( 'colspan' ) || 1 );\n\n\t\theadingColumns = headingColumns + colspan;\n\t\tindex++;\n\t}\n\n\treturn headingColumns;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tablewalker\n */\n\n/**\n * Table iterator class. It allows to iterate over table cells. For each cell the iterator yields\n * {@link module:table/tablewalker~TableWalkerValue} with proper table cell attributes.\n */\nexport default class TableWalker {\n\t/**\n\t * Creates an instance of the table walker.\n\t *\n\t * The table walker iterates internally by traversing the table from row index = 0 and column index = 0.\n\t * It walks row by row and column by column in order to output values defined in the constructor.\n\t * By default it will output only those locations that are occupied by a cell. To include also spanned rows and columns,\n\t * pass the `includeSpanned` option to the constructor.\n\t *\n\t * The most important values of the iterator are column and row indexes of a cell.\n\t *\n\t * See {@link module:table/tablewalker~TableWalkerValue} what values are returned by the table walker.\n\t *\n\t * To iterate over a given row:\n\t *\n\t *\t\tconst tableWalker = new TableWalker( table, { startRow: 1, endRow: 2 } );\n\t *\n\t *\t\tfor ( const cellInfo of tableWalker ) {\n\t *\t\t\tconsole.log( 'A cell at row ' + cellInfo.row + ' and column ' + cellInfo.column );\n\t *\t\t}\n\t *\n\t * For instance the code above for the following table:\n\t *\n\t *\t\t+----+----+----+----+----+----+\n\t *\t\t| 00 | 02 | 03 | 04 | 05 |\n\t *\t\t| +----+----+----+----+\n\t *\t\t| | 12 | 14 | 15 |\n\t *\t\t| +----+----+----+ +\n\t *\t\t| | 22 | |\n\t *\t\t|----+----+----+----+----+ +\n\t *\t\t| 30 | 31 | 32 | 33 | 34 | |\n\t *\t\t+----+----+----+----+----+----+\n\t *\n\t * will log in the console:\n\t *\n\t *\t\t'A cell at row 1 and column 2'\n\t *\t\t'A cell at row 1 and column 4'\n\t *\t\t'A cell at row 1 and column 5'\n\t *\t\t'A cell at row 2 and column 2'\n\t *\n\t * To also iterate over spanned cells:\n\t *\n\t *\t\tconst tableWalker = new TableWalker( table, { startRow: 1, endRow: 1, includeSpanned: true } );\n\t *\n\t *\t\tfor ( const value of tableWalker ) {\n\t *\t\t\tconsole.log( 'Cell at ' + value.row + ' x ' + value.column + ' : ' + ( value.isSpanned ? 'is spanned' : 'has data' ) );\n\t *\t\t}\n\t *\n\t * will log in the console for the table from previous example:\n\t *\n\t *\t\t'Cell at 1 x 0 : is spanned'\n\t *\t\t'Cell at 1 x 1 : is spanned'\n\t *\t\t'Cell at 1 x 2 : has data'\n\t *\t\t'Cell at 1 x 3 : is spanned'\n\t *\t\t'Cell at 1 x 4 : has data'\n\t *\t\t'Cell at 1 x 5 : has data'\n\t *\n\t * @constructor\n\t * @param {module:engine/model/element~Element} table A table over which the walker iterates.\n\t * @param {Object} [options={}] An object with configuration.\n\t * @param {Number} [options.column] A column index for which this iterator will output cells.\n\t * @param {Number} [options.startRow=0] A row index for which this iterator should start.\n\t * @param {Number} [options.endRow] A row index for which this iterator should end.\n\t * @param {Boolean} [options.includeSpanned=false] Also return values for spanned cells.\n\t */\n\tconstructor( table, options = {} ) {\n\t\t/**\n\t\t * The walker's table element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element}\n\t\t */\n\t\tthis.table = table;\n\n\t\t/**\n\t\t * A row index on which this iterator will start.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.startRow = options.startRow || 0;\n\n\t\t/**\n\t\t * A row index on which this iterator will end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.endRow = typeof options.endRow == 'number' ? options.endRow : undefined;\n\n\t\t/**\n\t\t * Enables output of spanned cells that are normally not yielded.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.includeSpanned = !!options.includeSpanned;\n\n\t\t/**\n\t\t * If set, the table walker will only output cells of a given column or cells that overlap it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.column = typeof options.column == 'number' ? options.column : undefined;\n\n\t\t/**\n\t\t * Row indexes to skip from the iteration.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set<Number>}\n\t\t * @private\n\t\t */\n\t\tthis._skipRows = new Set();\n\n\t\t/**\n\t\t * The current row index.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._row = 0;\n\n\t\t/**\n\t\t * The current column index.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._column = 0;\n\n\t\t/**\n\t\t * The cell index in a parent row. For spanned cells when {@link #includeSpanned} is set to `true`,\n\t\t * this represents the index of the next table cell.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._cellIndex = 0;\n\n\t\t/**\n\t\t * Holds a map of spanned cells in a table.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Map<Number, Map.<Number, module:engine/model/element~Element>>}\n\t\t * @private\n\t\t */\n\t\tthis._spannedCells = new Map();\n\n\t\tthis._nextCellAtColumn = -1;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:table/tablewalker~TableWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Gets the next table walker's value.\n\t *\n\t * @returns {module:table/tablewalker~TableWalkerValue} The next table walker's value.\n\t */\n\tnext() {\n\t\tconst row = this.table.getChild( this._row );\n\n\t\t// Iterator is done when there's no row (table ended) or the row is after `endRow` limit.\n\t\tif ( !row || this._isOverEndRow() ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\tlet cell, skipCurrentValue, outValue;\n\n\t\tif ( this._isSpanned( this._row, this._column ) ) {\n\t\t\tcell = this._getSpanned( this._row, this._column );\n\n\t\t\tskipCurrentValue = !this.includeSpanned || this._shouldSkipRow() || this._shouldSkipColumn();\n\t\t\toutValue = this._formatOutValue( cell, this._column, true );\n\t\t} else {\n\t\t\tcell = row.getChild( this._cellIndex );\n\n\t\t\tif ( !cell ) {\n\t\t\t\t// If there are no more cells left in row advance to the next row.\n\t\t\t\tthis._row++;\n\t\t\t\tthis._column = 0;\n\t\t\t\tthis._cellIndex = 0;\n\t\t\t\tthis._nextCellAtColumn = -1;\n\n\t\t\t\treturn this.next();\n\t\t\t}\n\n\t\t\tconst colspan = parseInt( cell.getAttribute( 'colspan' ) || 1 );\n\t\t\tconst rowspan = parseInt( cell.getAttribute( 'rowspan' ) || 1 );\n\n\t\t\t// Record this cell spans if it's not 1x1 cell.\n\t\t\tif ( colspan > 1 || rowspan > 1 ) {\n\t\t\t\tthis._recordSpans( this._row, this._column, rowspan, colspan, cell );\n\t\t\t}\n\n\t\t\tthis._nextCellAtColumn = this._column + colspan;\n\n\t\t\tskipCurrentValue = this._shouldSkipRow() || this._shouldSkipColumn();\n\t\t\toutValue = this._formatOutValue( cell, this._column, false, rowspan, colspan );\n\t\t}\n\n\t\t// Advance to the next column before returning value.\n\t\tthis._column++;\n\n\t\tif ( this._column == this._nextCellAtColumn ) {\n\t\t\tthis._cellIndex++;\n\t\t}\n\n\t\t// The current value will be returned only if current row and column are not skipped.\n\t\treturn skipCurrentValue ? this.next() : outValue;\n\t}\n\n\t/**\n\t * Marks a row to skip in the next iteration. It will also skip cells from the current row if there are any cells from the current row\n\t * to output.\n\t *\n\t * @param {Number} row Row index to skip.\n\t */\n\tskipRow( row ) {\n\t\tthis._skipRows.add( row );\n\t}\n\n\t/**\n\t * Checks if the current row is over {@link #endRow}.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_isOverEndRow() {\n\t\t// If {@link #endRow) is defined skip all rows above it.\n\t\treturn this.endRow !== undefined && this._row > this.endRow;\n\t}\n\n\t/**\n\t * A common method for formatting the iterator's output value.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} cell The table cell to output.\n\t * @param {Number} column Column index (use the cached value).\n\t * @param {Boolean} isSpanned Whether the value is returned for a spanned cell location or actual cell.\n\t * @param {Number} rowspan Rowspan of the current cell.\n\t * @param {Number} colspan Colspan of the current cell.\n\t * @returns {{done: boolean, value: {cell: *, row: Number, column: *, rowspan: *, colspan: *, cellIndex: Number}}}\n\t */\n\t_formatOutValue( cell, column, isSpanned, rowspan = 1, colspan = 1 ) {\n\t\treturn {\n\t\t\tdone: false,\n\t\t\tvalue: {\n\t\t\t\tcell,\n\t\t\t\trow: this._row,\n\t\t\t\tcolumn,\n\t\t\t\tisSpanned,\n\t\t\t\trowspan,\n\t\t\t\tcolspan,\n\t\t\t\tcellIndex: this._cellIndex\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Checks if the current row should be skipped.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_shouldSkipRow() {\n\t\tconst rowIsBelowStartRow = this._row < this.startRow;\n\t\tconst rowIsMarkedAsSkipped = this._skipRows.has( this._row );\n\n\t\treturn rowIsBelowStartRow || rowIsMarkedAsSkipped;\n\t}\n\n\t/**\n\t * Checks if the current column should be skipped.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_shouldSkipColumn() {\n\t\tif ( this.column === undefined ) {\n\t\t\t// The {@link #column} is not defined so output all columns.\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this.column != this._column;\n\t}\n\n\t/**\n\t * Checks if the current cell location (row x column) is spanned by another cell.\n\t *\n\t * @private\n\t * @param {Number} row Row index of a cell location to check.\n\t * @param {Number} column Column index of a cell location to check.\n\t * @returns {Boolean}\n\t */\n\t_isSpanned( row, column ) {\n\t\tif ( !this._spannedCells.has( row ) ) {\n\t\t\t// No spans for given row.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst rowSpans = this._spannedCells.get( row );\n\n\t\t// If spans for given rows has entry for column it means that this location if spanned by other cell.\n\t\treturn rowSpans.has( column );\n\t}\n\n\t/**\n\t * Returns the cell element that is spanned over `row` x `column` location.\n\t *\n\t * @private\n\t * @param {Number} row Row index of the cell location.\n\t * @param {Number} column Column index of the cell location.\n\t * @returns {module:engine/model/element~Element}\n\t */\n\t_getSpanned( row, column ) {\n\t\treturn this._spannedCells.get( row ).get( column );\n\t}\n\n\t/**\n\t * Updates spanned cells map relative to the current cell location and its span dimensions.\n\t *\n\t * @private\n\t * @param {Number} row Row index of a cell.\n\t * @param {Number} column Column index of a cell.\n\t * @param {Number} rowspan Cell height.\n\t * @param {Number} colspan Cell width.\n\t * @param {module:engine/model/element~Element} cell Cell that is spanned.\n\t */\n\t_recordSpans( row, column, rowspan, colspan, cell ) {\n\t\t// This will update all cell locations after current column - ie a cell has colspan set.\n\t\tfor ( let columnToUpdate = column + 1; columnToUpdate <= column + colspan - 1; columnToUpdate++ ) {\n\t\t\tthis._markSpannedCell( row, columnToUpdate, cell );\n\t\t}\n\n\t\t// This will update all rows below current up to row's height.\n\t\tfor ( let rowToUpdate = row + 1; rowToUpdate < row + rowspan; rowToUpdate++ ) {\n\t\t\tfor ( let columnToUpdate = column; columnToUpdate <= column + colspan - 1; columnToUpdate++ ) {\n\t\t\t\tthis._markSpannedCell( rowToUpdate, columnToUpdate, cell );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Marks the cell location as spanned by another cell.\n\t *\n\t * @private\n\t * @param {Number} row Row index of the cell location.\n\t * @param {Number} column Column index of the cell location.\n\t * @param {module:engine/model/element~Element} cell Cell that is spanned.\n\t */\n\t_markSpannedCell( row, column, cell ) {\n\t\tif ( !this._spannedCells.has( row ) ) {\n\t\t\tthis._spannedCells.set( row, new Map() );\n\t\t}\n\n\t\tconst rowSpans = this._spannedCells.get( row );\n\n\t\trowSpans.set( column, cell );\n\t}\n}\n\n/**\n * An object returned by {@link module:table/tablewalker~TableWalker} when traversing table cells.\n *\n * @typedef {Object} module:table/tablewalker~TableWalkerValue\n * @property {module:engine/model/element~Element} cell The current table cell.\n * @property {Number} row The row index of a cell.\n * @property {Number} column The column index of a cell. Column index is adjusted to widths and heights of previous cells.\n * @param {Boolean} isSpanned Whether the value is returned for a spanned cell location or actual cell.\n * @property {Number} colspan The `colspan` attribute of a cell. It the model attribute is not present, it is set to `1`. For spanned\n * table locations, it is set to `1`.\n * @property {Number} rowspan The `rowspan` attribute of a cell. It the model attribute is not present, it is set to `1`. For spanned\n * table locations, it is set to `1`.\n * @property {Number} cellIndex The index of the current cell in a parent row.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/utils\n */\n\nimport { isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { findAncestor } from './commands/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to a table widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the table widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label. It will be concatenated with the table `alt` attribute if one is present.\n * @returns {module:engine/view/element~Element}\n */\nexport function toTableWidget( viewElement, writer ) {\n\twriter.setCustomProperty( 'table', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { hasSelectionHandle: true } );\n}\n\n/**\n * Checks if a given view element is a table widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isTableWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'table' ) && isWidget( viewElement );\n}\n\n/**\n * Returns a table widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedTableWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isTableWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Returns a table widget editing view element if one is among selection's ancestors.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getTableWidgetAncestor( selection ) {\n\tconst parentTable = findAncestor( 'table', selection.getFirstPosition() );\n\n\tif ( parentTable && isTableWidget( parentTable.parent ) ) {\n\t\treturn parentTable.parent;\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/downcast\n */\n\nimport TableWalker from './../tablewalker';\nimport { toWidgetEditable } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { toTableWidget } from '../utils';\n\n/**\n * Model table element to view table element conversion helper.\n *\n * This conversion helper creates the whole table element with child elements.\n *\n * @param {Object} options\n * @param {Boolean} options.asWidget If set to `true`, the downcast conversion will produce a widget.\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertTable( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( table, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Consume attributes if present to not fire attribute change downcast\n\t\tconversionApi.consumable.consume( table, 'attribute:headingRows:table' );\n\t\tconversionApi.consumable.consume( table, 'attribute:headingColumns:table' );\n\n\t\tconst asWidget = options && options.asWidget;\n\n\t\tconst figureElement = conversionApi.writer.createContainerElement( 'figure', { class: 'table' } );\n\t\tconst tableElement = conversionApi.writer.createContainerElement( 'table' );\n\t\tconversionApi.writer.insert( conversionApi.writer.createPositionAt( figureElement, 0 ), tableElement );\n\n\t\tlet tableWidget;\n\n\t\tif ( asWidget ) {\n\t\t\ttableWidget = toTableWidget( figureElement, conversionApi.writer );\n\t\t}\n\n\t\tconst tableWalker = new TableWalker( table );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// Cache for created table rows.\n\t\tconst viewRows = new Map();\n\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tconst { row, cell } = tableWalkerValue;\n\n\t\t\tconst tableSection = getOrCreateTableSection( getSectionName( row, tableAttributes ), tableElement, conversionApi );\n\t\t\tconst tableRow = table.getChild( row );\n\n\t\t\tconst trElement = viewRows.get( row ) || createTr( tableRow, row, tableSection, conversionApi );\n\t\t\tviewRows.set( row, trElement );\n\n\t\t\t// Consume table cell - it will be always consumed as we convert whole table at once.\n\t\t\tconversionApi.consumable.consume( cell, 'insert' );\n\n\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, 'end' );\n\n\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\t\t}\n\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconversionApi.mapper.bindElements( table, asWidget ? tableWidget : figureElement );\n\t\tconversionApi.writer.insert( viewPosition, asWidget ? tableWidget : figureElement );\n\t} );\n}\n\n/**\n * Model row element to view `<tr>` element conversion helper.\n *\n * This conversion helper creates the whole `<tr>` element with child elements.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertRow( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:tableRow', ( evt, data, conversionApi ) => {\n\t\tconst tableRow = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( tableRow, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst table = tableRow.parent;\n\n\t\tconst figureElement = conversionApi.mapper.toViewElement( table );\n\t\tconst tableElement = getViewTable( figureElement );\n\n\t\tconst row = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: row, endRow: row } );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// Cache for created table rows.\n\t\tconst viewRows = new Map();\n\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tconst tableSection = getOrCreateTableSection( getSectionName( row, tableAttributes ), tableElement, conversionApi );\n\n\t\t\tconst trElement = viewRows.get( row ) || createTr( tableRow, row, tableSection, conversionApi );\n\t\t\tviewRows.set( row, trElement );\n\n\t\t\t// Consume table cell - it will be always consumed as we convert whole row at once.\n\t\t\tconversionApi.consumable.consume( tableWalkerValue.cell, 'insert' );\n\n\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, 'end' );\n\n\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\t\t}\n\t} );\n}\n\n/**\n * Model table cell element to view `<td>` or `<th>` element conversion helper.\n *\n * This conversion helper will create proper `<th>` elements for table cells that are in the heading section (heading row or column)\n * and `<td>` otherwise.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertCell( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:tableCell', ( evt, data, conversionApi ) => {\n\t\tconst tableCell = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( tableCell, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\t\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: rowIndex, endRow: rowIndex } );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// We need to iterate over a table in order to get proper row & column values from a walker\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tif ( tableWalkerValue.cell === tableCell ) {\n\t\t\t\tconst trElement = conversionApi.mapper.toViewElement( tableRow );\n\t\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, tableRow.getChildIndex( tableCell ) );\n\n\t\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\n\t\t\t\t// No need to iterate further.\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on heading rows table attribute change.\n *\n * This converter will:\n *\n * * Rename `<td>` to `<th>` elements or vice versa depending on headings.\n * * Create `<thead>` or `<tbody>` elements if needed.\n * * Remove empty `<thead>` or `<tbody>` if needed.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastTableHeadingRowsChange( options = {} ) {\n\tconst asWidget = !!options.asWidget;\n\n\treturn dispatcher => dispatcher.on( 'attribute:headingRows:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst figureElement = conversionApi.mapper.toViewElement( table );\n\t\tconst viewTable = getViewTable( figureElement );\n\n\t\tconst oldRows = data.attributeOldValue;\n\t\tconst newRows = data.attributeNewValue;\n\n\t\t// The head section has grown so move rows from <tbody> to <thead>.\n\t\tif ( newRows > oldRows ) {\n\t\t\t// Filter out only those rows that are in wrong section.\n\t\t\tconst rowsToMove = Array.from( table.getChildren() ).filter( ( { index } ) => isBetween( index, oldRows - 1, newRows ) );\n\n\t\t\tconst viewTableHead = getOrCreateTableSection( 'thead', viewTable, conversionApi );\n\t\t\tmoveViewRowsToTableSection( rowsToMove, viewTableHead, conversionApi, 'end' );\n\n\t\t\t// Rename all table cells from moved rows to 'th' as they lands in <thead>.\n\t\t\tfor ( const tableRow of rowsToMove ) {\n\t\t\t\tfor ( const tableCell of tableRow.getChildren() ) {\n\t\t\t\t\trenameViewTableCell( tableCell, 'th', conversionApi, asWidget );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Cleanup: this will remove any empty section from the view which may happen when moving all rows from a table section.\n\t\t\tremoveTableSectionIfEmpty( 'tbody', viewTable, conversionApi );\n\t\t}\n\t\t// The head section has shrunk so move rows from <thead> to <tbody>.\n\t\telse {\n\t\t\t// Filter out only those rows that are in wrong section.\n\t\t\tconst rowsToMove = Array.from( table.getChildren() )\n\t\t\t\t.filter( ( { index } ) => isBetween( index, newRows - 1, oldRows ) )\n\t\t\t\t.reverse(); // The rows will be moved from <thead> to <tbody> in reverse order at the beginning of a <tbody>.\n\n\t\t\tconst viewTableBody = getOrCreateTableSection( 'tbody', viewTable, conversionApi );\n\t\t\tmoveViewRowsToTableSection( rowsToMove, viewTableBody, conversionApi, 0 );\n\n\t\t\t// Check if cells moved from <thead> to <tbody> requires renaming to <td> as this depends on current heading columns attribute.\n\t\t\tconst tableWalker = new TableWalker( table, { startRow: newRows ? newRows - 1 : newRows, endRow: oldRows - 1 } );\n\n\t\t\tconst tableAttributes = {\n\t\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t\t};\n\n\t\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\t\trenameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget );\n\t\t\t}\n\n\t\t\t// Cleanup: this will remove any empty section from the view which may happen when moving all rows from a table section.\n\t\t\tremoveTableSectionIfEmpty( 'thead', viewTable, conversionApi );\n\t\t}\n\n\t\tfunction isBetween( index, lower, upper ) {\n\t\t\treturn index > lower && index < upper;\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on heading columns table attribute change.\n *\n * Depending on changed attributes this converter will rename `<td` to `<th>` elements or vice versa depending of the cell column index.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastTableHeadingColumnsChange( options = {} ) {\n\tconst asWidget = !!options.asWidget;\n\n\treturn dispatcher => dispatcher.on( 'attribute:headingColumns:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\tconst oldColumns = data.attributeOldValue;\n\t\tconst newColumns = data.attributeNewValue;\n\n\t\tconst lastColumnToCheck = ( oldColumns > newColumns ? oldColumns : newColumns ) - 1;\n\n\t\tfor ( const tableWalkerValue of new TableWalker( table ) ) {\n\t\t\t// Skip cells that were not in heading section before and after the change.\n\t\t\tif ( tableWalkerValue.column > lastColumnToCheck ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\trenameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget );\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on a removed row.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastRemoveRow() {\n\treturn dispatcher => dispatcher.on( 'remove:tableRow', ( evt, data, conversionApi ) => {\n\t\t// Prevent default remove converter.\n\t\tevt.stop();\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst mapper = conversionApi.mapper;\n\n\t\tconst viewStart = mapper.toViewPosition( data.position ).getLastMatchingPosition( value => !value.item.is( 'tr' ) );\n\t\tconst viewItem = viewStart.nodeAfter;\n\t\tconst tableSection = viewItem.parent;\n\n\t\t// Remove associated <tr> from the view.\n\t\tconst removeRange = viewWriter.createRangeOn( viewItem );\n\t\tconst removed = viewWriter.remove( removeRange );\n\n\t\tfor ( const child of viewWriter.createRangeIn( removed ).getItems() ) {\n\t\t\tmapper.unbindViewElement( child );\n\t\t}\n\n\t\t// Check if table section has any children left - if not remove it from the view.\n\t\tif ( !tableSection.childCount ) {\n\t\t\t// No need to unbind anything as table section is not represented in the model.\n\t\t\tviewWriter.remove( viewWriter.createRangeOn( tableSection ) );\n\t\t}\n\t}, { priority: 'higher' } );\n}\n\n// Renames an existing table cell in the view to a given element name.\n//\n// **Note** This method will not do anything if a view table cell was not yet converted.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} desiredCellElementName\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Boolean} asWidget\nfunction renameViewTableCell( tableCell, desiredCellElementName, conversionApi, asWidget ) {\n\tconst viewWriter = conversionApi.writer;\n\tconst viewCell = conversionApi.mapper.toViewElement( tableCell );\n\n\t// View cell might be not yet converted - skip it as it will be properly created by cell converter later on.\n\tif ( !viewCell ) {\n\t\treturn;\n\t}\n\n\tlet renamedCell;\n\n\tif ( asWidget ) {\n\t\tconst editable = viewWriter.createEditableElement( desiredCellElementName, viewCell.getAttributes() );\n\t\trenamedCell = toWidgetEditable( editable, viewWriter );\n\n\t\tviewWriter.insert( viewWriter.createPositionAfter( viewCell ), renamedCell );\n\t\tviewWriter.move( viewWriter.createRangeIn( viewCell ), viewWriter.createPositionAt( renamedCell, 0 ) );\n\t\tviewWriter.remove( viewWriter.createRangeOn( viewCell ) );\n\t} else {\n\t\trenamedCell = viewWriter.rename( desiredCellElementName, viewCell );\n\t}\n\n\tconversionApi.mapper.unbindViewElement( viewCell );\n\tconversionApi.mapper.bindElements( tableCell, renamedCell );\n}\n\n// Renames a table cell element in the view according to its location in the table.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {{headingColumns, headingRows}} tableAttributes\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Boolean} asWidget\nfunction renameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget ) {\n\tconst { cell } = tableWalkerValue;\n\n\t// Check whether current columnIndex is overlapped by table cells from previous rows.\n\tconst desiredCellElementName = getCellElementName( tableWalkerValue, tableAttributes );\n\n\tconst viewCell = conversionApi.mapper.toViewElement( cell );\n\n\t// If in single change we're converting attribute changes and inserting cell the table cell might not be inserted into view\n\t// because of child conversion is done after parent.\n\tif ( viewCell && viewCell.name !== desiredCellElementName ) {\n\t\trenameViewTableCell( cell, desiredCellElementName, conversionApi, asWidget );\n\t}\n}\n\n// Creates a table cell element in the view.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {module:engine/view/position~Position} insertPosition\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction createViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options ) {\n\tconst asWidget = options && options.asWidget;\n\tconst cellElementName = getCellElementName( tableWalkerValue, tableAttributes );\n\n\tconst cellElement = asWidget ?\n\t\ttoWidgetEditable( conversionApi.writer.createEditableElement( cellElementName ), conversionApi.writer ) :\n\t\tconversionApi.writer.createContainerElement( cellElementName );\n\n\tconst tableCell = tableWalkerValue.cell;\n\n\tconst firstChild = tableCell.getChild( 0 );\n\tconst isSingleParagraph = tableCell.childCount === 1 && firstChild.name === 'paragraph';\n\n\tconversionApi.writer.insert( insertPosition, cellElement );\n\n\tif ( isSingleParagraph && !hasAnyAttribute( firstChild ) ) {\n\t\tconst innerParagraph = tableCell.getChild( 0 );\n\t\tconst paragraphInsertPosition = conversionApi.writer.createPositionAt( cellElement, 'end' );\n\n\t\tconversionApi.consumable.consume( innerParagraph, 'insert' );\n\n\t\tif ( options.asWidget ) {\n\t\t\tconst fakeParagraph = conversionApi.writer.createContainerElement( 'span' );\n\n\t\t\tconversionApi.mapper.bindElements( innerParagraph, fakeParagraph );\n\t\t\tconversionApi.writer.insert( paragraphInsertPosition, fakeParagraph );\n\n\t\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t\t} else {\n\t\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t\t\tconversionApi.mapper.bindElements( innerParagraph, cellElement );\n\t\t}\n\t} else {\n\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t}\n}\n\n// Creates `<tr>` view element.\n//\n// @param {module:engine/view/element~Element} tableRow\n// @param {Number} rowIndex\n// @param {module:engine/view/element~Element} tableSection\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @returns {module:engine/view/element~Element}\nfunction createTr( tableRow, rowIndex, tableSection, conversionApi ) {\n\t// Will always consume since we're converting <tableRow> element from a parent <table>.\n\tconversionApi.consumable.consume( tableRow, 'insert' );\n\n\tconst trElement = conversionApi.writer.createContainerElement( 'tr' );\n\tconversionApi.mapper.bindElements( tableRow, trElement );\n\n\tconst headingRows = tableRow.parent.getAttribute( 'headingRows' ) || 0;\n\tconst offset = headingRows > 0 && rowIndex >= headingRows ? rowIndex - headingRows : rowIndex;\n\n\tconst position = conversionApi.writer.createPositionAt( tableSection, offset );\n\tconversionApi.writer.insert( position, trElement );\n\n\treturn trElement;\n}\n\n// Returns `th` for heading cells and `td` for other cells for the current table walker value.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {{headingColumns, headingRows}} tableAttributes\n// @returns {String}\nfunction getCellElementName( tableWalkerValue, tableAttributes ) {\n\tconst { row, column } = tableWalkerValue;\n\tconst { headingColumns, headingRows } = tableAttributes;\n\n\t// Column heading are all tableCells in the first `columnHeading` rows.\n\tconst isColumnHeading = headingRows && headingRows > row;\n\n\t// So a whole row gets <th> element.\n\tif ( isColumnHeading ) {\n\t\treturn 'th';\n\t}\n\n\t// Row heading are tableCells which columnIndex is lower then headingColumns.\n\tconst isRowHeading = headingColumns && headingColumns > column;\n\n\treturn isRowHeading ? 'th' : 'td';\n}\n\n// Returns the table section name for the current table walker value.\n//\n// @param {Number} row\n// @param {{headingColumns, headingRows}} tableAttributes\n// @returns {String}\nfunction getSectionName( row, tableAttributes ) {\n\treturn row < tableAttributes.headingRows ? 'thead' : 'tbody';\n}\n\n// Creates or returns an existing `<tbody>` or `<thead>` element witch caching.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} viewTable\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Object} cachedTableSection An object that stores cached elements.\n// @returns {module:engine/view/containerelement~ContainerElement}\nfunction getOrCreateTableSection( sectionName, viewTable, conversionApi ) {\n\tconst viewTableSection = getExistingTableSectionElement( sectionName, viewTable );\n\n\treturn viewTableSection ? viewTableSection : createTableSection( sectionName, viewTable, conversionApi );\n}\n\n// Finds an existing `<tbody>` or `<thead>` element or returns undefined.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction getExistingTableSectionElement( sectionName, tableElement ) {\n\tfor ( const tableSection of tableElement.getChildren() ) {\n\t\tif ( tableSection.name == sectionName ) {\n\t\t\treturn tableSection;\n\t\t}\n\t}\n}\n\n// Creates a table section at the end of the table.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @returns {module:engine/view/containerelement~ContainerElement}\nfunction createTableSection( sectionName, tableElement, conversionApi ) {\n\tconst tableChildElement = conversionApi.writer.createContainerElement( sectionName );\n\n\tconst insertPosition = conversionApi.writer.createPositionAt( tableElement, sectionName == 'tbody' ? 'end' : 0 );\n\n\tconversionApi.writer.insert( insertPosition, tableChildElement );\n\n\treturn tableChildElement;\n}\n\n// Removes an existing `<tbody>` or `<thead>` element if it is empty.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction removeTableSectionIfEmpty( sectionName, tableElement, conversionApi ) {\n\tconst tableSection = getExistingTableSectionElement( sectionName, tableElement );\n\n\tif ( tableSection && tableSection.childCount === 0 ) {\n\t\tconversionApi.writer.remove( conversionApi.writer.createRangeOn( tableSection ) );\n\t}\n}\n\n// Moves view table rows associated with passed model rows to the provided table section element.\n//\n// **Note** This method will skip not converted table rows.\n//\n// @param {Array.<module:engine/model/element~Element>} rowsToMove\n// @param {module:engine/view/element~Element} viewTableSection\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Number|'end'|'before'|'after'} offset Offset or one of the flags.\nfunction moveViewRowsToTableSection( rowsToMove, viewTableSection, conversionApi, offset ) {\n\tfor ( const tableRow of rowsToMove ) {\n\t\tconst viewTableRow = conversionApi.mapper.toViewElement( tableRow );\n\n\t\t// View table row might be not yet converted - skip it as it will be properly created by cell converter later on.\n\t\tif ( viewTableRow ) {\n\t\t\tconversionApi.writer.move(\n\t\t\t\tconversionApi.writer.createRangeOn( viewTableRow ),\n\t\t\t\tconversionApi.writer.createPositionAt( viewTableSection, offset )\n\t\t\t);\n\t\t}\n\t}\n}\n\n// Properly finds '<table>' element inside `<figure>` widget.\n//\n// @param {module:engine/view/element~Element} viewFigure\nfunction getViewTable( viewFigure ) {\n\tfor ( const child of viewFigure.getChildren() ) {\n\t\tif ( child.name === 'table' ) {\n\t\t\treturn child;\n\t\t}\n\t}\n}\n\n// Checks if element has any attribute set.\n//\n// @param {module:engine/model/element~Element element\n// @returns {Boolean}\nfunction hasAnyAttribute( element ) {\n\treturn !![ ...element.getAttributeKeys() ].length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/inserttablecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findOptimalInsertionPosition } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * The insert table command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTable'` editor command.\n *\n * To insert a table at the current selection, execute the command and specify the dimensions:\n *\n *\t\teditor.execute( 'insertTable', { rows: 20, columns: 5 } );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertTableCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst schema = model.schema;\n\n\t\tconst validParent = getInsertTableParent( selection.getFirstPosition() );\n\n\t\tthis.isEnabled = schema.checkChild( validParent, 'table' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Inserts a table with the given number of rows and columns into the editor.\n\t *\n\t * @param {Object} options\n\t * @param {Number} [options.rows=2] The number of rows to create in the inserted table.\n\t * @param {Number} [options.columns=2] The number of columns to create in the inserted table.\n\t * @fires execute\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst rows = parseInt( options.rows ) || 2;\n\t\tconst columns = parseInt( options.columns ) || 2;\n\n\t\tconst insertPosition = findOptimalInsertionPosition( selection, model );\n\n\t\tmodel.change( writer => {\n\t\t\tconst table = tableUtils.createTable( writer, rows, columns );\n\n\t\t\tmodel.insertContent( table, insertPosition );\n\n\t\t\twriter.setSelection( writer.createPositionAt( table.getNodeByPath( [ 0, 0, 0 ] ), 0 ) );\n\t\t} );\n\t}\n}\n\n// Returns valid parent to insert table\n//\n// @param {module:engine/model/position} position\nfunction getInsertTableParent( position ) {\n\tconst parent = position.parent;\n\n\treturn parent === parent.root ? parent : parent.parent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/insertrowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The insert row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTableRowBelow'` and\n * `'insertTableRowAbove'` editor commands.\n *\n * To insert a row below the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableRowBelow' );\n *\n * To insert a row above the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableRowAbove' );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertRowCommand extends Command {\n\t/**\n\t * Creates a new `InsertRowCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} [options.order=\"below\"] The order of insertion relative to the row in which the caret is located.\n\t * Possible values: `\"above\"` and `\"below\"`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The order of insertion relative to the row in which the caret is located.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:table/commands/insertrowcommand~InsertRowCommand#order\n\t\t */\n\t\tthis.order = options.order || 'below';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst tableParent = findAncestor( 'table', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableParent;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #order} value, it inserts a row `'below'` or `'above'` the row in which selection is set.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst tableCell = findAncestor( 'tableCell', selection.getFirstPosition() );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst row = table.getChildIndex( tableRow );\n\t\tconst insertAt = this.order === 'below' ? row + 1 : row;\n\n\t\ttableUtils.insertRows( table, { rows: 1, at: insertAt } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/insertcolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The insert column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTableColumnLeft'` and\n * `'insertTableColumnRight'` editor commands.\n *\n * To insert a column to the left of the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableColumnLeft' );\n *\n * To insert a column to the right of the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableColumnRight' );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertColumnCommand extends Command {\n\t/**\n\t * Creates a new `InsertColumnCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor An editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} [options.order=\"right\"] The order of insertion relative to the column in which the caret is located.\n\t * Possible values: `\"left\"` and `\"right\"`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The order of insertion relative to the column in which the caret is located.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:table/commands/insertcolumncommand~InsertColumnCommand#order\n\t\t */\n\t\tthis.order = options.order || 'right';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst tableParent = findAncestor( 'table', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableParent;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #order} value, it inserts a column to the `'left'` or `'right'` of the column\n\t * in which the selection is set.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst table = tableCell.parent.parent;\n\n\t\tconst { column } = tableUtils.getCellLocation( tableCell );\n\t\tconst insertAt = this.order === 'right' ? column + 1 : column;\n\n\t\ttableUtils.insertColumns( table, { columns: 1, at: insertAt } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/splitcellcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The split cell command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'splitTableCellVertically'`\n * and `'splitTableCellHorizontally'` editor commands.\n *\n * You can split any cell vertically or horizontally by executing this command. For example, to split the selected table cell vertically:\n *\n *\t\teditor.execute( 'splitTableCellVertically' );\n *\n * @extends module:core/command~Command\n */\nexport default class SplitCellCommand extends Command {\n\t/**\n\t * Creates a new `SplitCellCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} options.direction Indicates whether the command should split cells `'horizontally'` or `'vertically'`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The direction that indicates which cell will be split.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #direction\n\t\t */\n\t\tthis.direction = options.direction || 'horizontally';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst selection = document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\n\t\tconst isHorizontally = this.direction === 'horizontally';\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tif ( isHorizontally ) {\n\t\t\ttableUtils.splitCellHorizontally( tableCell, 2 );\n\t\t} else {\n\t\t\ttableUtils.splitCellVertically( tableCell, 2 );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/mergecellcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The merge cell command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'mergeTableCellRight'`, `'mergeTableCellLeft'`,\n * `'mergeTableCellUp'` and `'mergeTableCellDown'` editor commands.\n *\n * To merge a table cell at the current selection with another cell, execute the command corresponding with the preferred direction.\n *\n * For example, to merge with a cell to the right:\n *\n *\t\teditor.execute( 'mergeTableCellRight' );\n *\n * **Note**: If a table cell has a different [`rowspan`](https://www.w3.org/TR/html50/tabular-data.html#attr-tdth-rowspan)\n * (for `'mergeTableCellRight'` and `'mergeTableCellLeft'`) or [`colspan`](https://www.w3.org/TR/html50/tabular-data.html#attr-tdth-colspan)\n * (for `'mergeTableCellUp'` and `'mergeTableCellDown'`), the command will be disabled.\n *\n * @extends module:core/command~Command\n */\nexport default class MergeCellCommand extends Command {\n\t/**\n\t * Creates a new `MergeCellCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} options.direction Indicates which cell to merge with the currently selected one.\n\t * Possible values are: `'left'`, `'right'`, `'up'` and `'down'`.\n\t */\n\tconstructor( editor, options ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The direction that indicates which cell will be merged with the currently selected one.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #direction\n\t\t */\n\t\tthis.direction = options.direction;\n\n\t\t/**\n\t\t * Whether the merge is horizontal (left/right) or vertical (up/down).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isHorizontal\n\t\t */\n\t\tthis.isHorizontal = this.direction == 'right' || this.direction == 'left';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst cellToMerge = this._getMergeableCell();\n\n\t\tthis.value = cellToMerge;\n\t\tthis.isEnabled = !!cellToMerge;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #direction} value, it will merge the cell that is to the `'left'`, `'right'`, `'up'` or `'down'`.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\t\tconst cellToMerge = this.value;\n\t\tconst direction = this.direction;\n\n\t\tmodel.change( writer => {\n\t\t\tconst isMergeNext = direction == 'right' || direction == 'down';\n\n\t\t\t// The merge mechanism is always the same so sort cells to be merged.\n\t\t\tconst cellToExpand = isMergeNext ? tableCell : cellToMerge;\n\t\t\tconst cellToRemove = isMergeNext ? cellToMerge : tableCell;\n\n\t\t\t// Cache the parent of cell to remove for later check.\n\t\t\tconst removedTableCellRow = cellToRemove.parent;\n\n\t\t\tmergeTableCells( cellToRemove, cellToExpand, writer );\n\n\t\t\tconst spanAttribute = this.isHorizontal ? 'colspan' : 'rowspan';\n\t\t\tconst cellSpan = parseInt( tableCell.getAttribute( spanAttribute ) || 1 );\n\t\t\tconst cellToMergeSpan = parseInt( cellToMerge.getAttribute( spanAttribute ) || 1 );\n\n\t\t\t// Update table cell span attribute and merge set selection on merged contents.\n\t\t\twriter.setAttribute( spanAttribute, cellSpan + cellToMergeSpan, cellToExpand );\n\t\t\twriter.setSelection( writer.createRangeIn( cellToExpand ) );\n\n\t\t\t// Remove empty row after merging.\n\t\t\tif ( !removedTableCellRow.childCount ) {\n\t\t\t\tremoveEmptyRow( removedTableCellRow, writer );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns a cell that can be merged with the current cell depending on the command's direction.\n\t *\n\t * @returns {module:engine/model/element~Element|undefined}\n\t * @private\n\t */\n\t_getMergeableCell() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tif ( !tableCell ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\t// First get the cell on proper direction.\n\t\tconst cellToMerge = this.isHorizontal ?\n\t\t\tgetHorizontalCell( tableCell, this.direction, tableUtils ) :\n\t\t\tgetVerticalCell( tableCell, this.direction );\n\n\t\tif ( !cellToMerge ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If found check if the span perpendicular to merge direction is equal on both cells.\n\t\tconst spanAttribute = this.isHorizontal ? 'rowspan' : 'colspan';\n\t\tconst span = parseInt( tableCell.getAttribute( spanAttribute ) || 1 );\n\n\t\tconst cellToMergeSpan = parseInt( cellToMerge.getAttribute( spanAttribute ) || 1 );\n\n\t\tif ( cellToMergeSpan === span ) {\n\t\t\treturn cellToMerge;\n\t\t}\n\t}\n}\n\n// Returns the cell that can be merged horizontally.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} direction\n// @returns {module:engine/model/node~Node|null}\nfunction getHorizontalCell( tableCell, direction, tableUtils ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\tconst horizontalCell = direction == 'right' ? tableCell.nextSibling : tableCell.previousSibling;\n\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\n\tif ( !horizontalCell ) {\n\t\treturn;\n\t}\n\n\t// Sort cells:\n\tconst cellOnLeft = direction == 'right' ? tableCell : horizontalCell;\n\tconst cellOnRight = direction == 'right' ? horizontalCell : tableCell;\n\n\t// Get their column indexes:\n\tconst { column: leftCellColumn } = tableUtils.getCellLocation( cellOnLeft );\n\tconst { column: rightCellColumn } = tableUtils.getCellLocation( cellOnRight );\n\n\tconst leftCellSpan = parseInt( cellOnLeft.getAttribute( 'colspan' ) || 1 );\n\tconst rightCellSpan = parseInt( cellOnRight.getAttribute( 'colspan' ) || 1 );\n\n\t// We cannot merge cells if the result will extend over heading section.\n\tconst isMergeWithBodyCell = direction == 'right' && ( rightCellColumn + rightCellSpan > headingColumns );\n\tconst isMergeWithHeadCell = direction == 'left' && ( leftCellColumn + leftCellSpan > headingColumns - 1 );\n\n\tif ( headingColumns && ( isMergeWithBodyCell || isMergeWithHeadCell ) ) {\n\t\treturn;\n\t}\n\n\t// The cell on the right must have index that is distant to the cell on the left by the left cell's width (colspan).\n\tconst cellsAreTouching = leftCellColumn + leftCellSpan === rightCellColumn;\n\n\t// If the right cell's column index is different it means that there are rowspanned cells between them.\n\treturn cellsAreTouching ? horizontalCell : undefined;\n}\n\n// Returns the cell that can be merged vertically.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} direction\n// @returns {module:engine/model/node~Node|null}\nfunction getVerticalCell( tableCell, direction ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\n\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t// Don't search for mergeable cell if direction points out of the table.\n\tif ( ( direction == 'down' && rowIndex === table.childCount - 1 ) || ( direction == 'up' && rowIndex === 0 ) ) {\n\t\treturn;\n\t}\n\n\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\tconst isMergeWithBodyCell = direction == 'down' && ( rowIndex + rowspan ) === headingRows;\n\tconst isMergeWithHeadCell = direction == 'up' && rowIndex === headingRows;\n\n\t// Don't search for mergeable cell if direction points out of the current table section.\n\tif ( headingRows && ( isMergeWithBodyCell || isMergeWithHeadCell ) ) {\n\t\treturn;\n\t}\n\n\tconst currentCellRowSpan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\tconst rowOfCellToMerge = direction == 'down' ? rowIndex + currentCellRowSpan : rowIndex;\n\n\tconst tableMap = [ ...new TableWalker( table, { endRow: rowOfCellToMerge } ) ];\n\n\tconst currentCellData = tableMap.find( value => value.cell === tableCell );\n\tconst mergeColumn = currentCellData.column;\n\n\tconst cellToMergeData = tableMap.find( ( { row, rowspan, column } ) => {\n\t\tif ( column !== mergeColumn ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( direction == 'down' ) {\n\t\t\t// If merging a cell below the mergeRow is already calculated.\n\t\t\treturn row === rowOfCellToMerge;\n\t\t} else {\n\t\t\t// If merging a cell above calculate if it spans to mergeRow.\n\t\t\treturn rowOfCellToMerge === row + rowspan;\n\t\t}\n\t} );\n\n\treturn cellToMergeData && cellToMergeData.cell;\n}\n\n// Properly removes empty row from a table. Will update `rowspan` attribute of cells that overlaps removed row.\n//\n// @param {module:engine/model/element~Element} removedTableCellRow\n// @param {module:engine/model/writer~Writer} writer\nfunction removeEmptyRow( removedTableCellRow, writer ) {\n\tconst table = removedTableCellRow.parent;\n\n\tconst removedRowIndex = table.getChildIndex( removedTableCellRow );\n\n\tfor ( const { cell, row, rowspan } of new TableWalker( table, { endRow: removedRowIndex } ) ) {\n\t\tconst overlapsRemovedRow = row + rowspan - 1 >= removedRowIndex;\n\n\t\tif ( overlapsRemovedRow ) {\n\t\t\tupdateNumericAttribute( 'rowspan', rowspan - 1, cell, writer );\n\t\t}\n\t}\n\n\twriter.remove( removedTableCellRow );\n}\n\n// Merges two table cells - will ensure that after merging cells with empty paragraph the result table cell will only have one paragraph.\n// If one of the merged table cell is empty the merged table cell will have contents of the non-empty table cell.\n// If both are empty the merged table cell will have only one empty paragraph.\n//\n// @param {module:engine/model/element~Element} cellToRemove\n// @param {module:engine/model/element~Element} cellToExpand\n// @param {module:engine/model/writer~Writer} writer\nfunction mergeTableCells( cellToRemove, cellToExpand, writer ) {\n\tif ( !isEmpty( cellToRemove ) ) {\n\t\tif ( isEmpty( cellToExpand ) ) {\n\t\t\twriter.remove( writer.createRangeIn( cellToExpand ) );\n\t\t}\n\n\t\twriter.move( writer.createRangeIn( cellToRemove ), writer.createPositionAt( cellToExpand, 'end' ) );\n\t}\n\n\t// Remove merged table cell.\n\twriter.remove( cellToRemove );\n}\n\n// Checks if passed table cell contains empty paragraph.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @returns {Boolean}\nfunction isEmpty( tableCell ) {\n\treturn tableCell.childCount == 1 && tableCell.getChild( 0 ).is( 'paragraph' ) && tableCell.getChild( 0 ).isEmpty;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/removerowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The remove row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'removeTableRow'` editor command.\n *\n * To remove the row containing the selected cell, execute the command:\n *\n *\t\teditor.execute( 'removeTableRow' );\n *\n * @extends module:core/command~Command\n */\nexport default class RemoveRowCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell && tableCell.parent.parent.childCount > 1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst currentRow = table.getChildIndex( tableRow );\n\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( headingRows && currentRow <= headingRows ) {\n\t\t\t\tupdateNumericAttribute( 'headingRows', headingRows - 1, table, writer, 0 );\n\t\t\t}\n\n\t\t\tconst tableMap = [ ...new TableWalker( table, { endRow: currentRow } ) ];\n\n\t\t\tconst cellsToMove = new Map();\n\n\t\t\t// Get cells from removed row that are spanned over multiple rows.\n\t\t\ttableMap\n\t\t\t\t.filter( ( { row, rowspan } ) => row === currentRow && rowspan > 1 )\n\t\t\t\t.forEach( ( { column, cell, rowspan } ) => cellsToMove.set( column, { cell, rowspanToSet: rowspan - 1 } ) );\n\n\t\t\t// Reduce rowspan on cells that are above removed row and overlaps removed row.\n\t\t\ttableMap\n\t\t\t\t.filter( ( { row, rowspan } ) => row <= currentRow - 1 && row + rowspan > currentRow )\n\t\t\t\t.forEach( ( { cell, rowspan } ) => updateNumericAttribute( 'rowspan', rowspan - 1, cell, writer ) );\n\n\t\t\t// Move cells to another row.\n\t\t\tconst targetRow = currentRow + 1;\n\t\t\tconst tableWalker = new TableWalker( table, { includeSpanned: true, startRow: targetRow, endRow: targetRow } );\n\n\t\t\tlet previousCell;\n\n\t\t\tfor ( const { row, column, cell } of [ ...tableWalker ] ) {\n\t\t\t\tif ( cellsToMove.has( column ) ) {\n\t\t\t\t\tconst { cell: cellToMove, rowspanToSet } = cellsToMove.get( column );\n\t\t\t\t\tconst targetPosition = previousCell ?\n\t\t\t\t\t\twriter.createPositionAfter( previousCell ) :\n\t\t\t\t\t\twriter.createPositionAt( table.getChild( row ), 0 );\n\n\t\t\t\t\twriter.move( writer.createRangeOn( cellToMove ), targetPosition );\n\t\t\t\t\tupdateNumericAttribute( 'rowspan', rowspanToSet, cellToMove, writer );\n\n\t\t\t\t\tpreviousCell = cellToMove;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousCell = cell;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\twriter.remove( tableRow );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/removecolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The remove column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'removeTableColumn'` editor command.\n *\n * To remove the column containing the selected cell, execute the command:\n *\n *\t\teditor.execute( 'removeTableColumn' );\n *\n * @extends module:core/command~Command\n */\nexport default class RemoveColumnCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst tableCell = findAncestor( 'tableCell', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell && tableUtils.getColumns( tableCell.parent.parent ) > 1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\t\tconst row = table.getChildIndex( tableRow );\n\n\t\t// Cache the table before removing or updating colspans.\n\t\tconst tableMap = [ ...new TableWalker( table ) ];\n\n\t\t// Get column index of removed column.\n\t\tconst cellData = tableMap.find( value => value.cell === tableCell );\n\t\tconst removedColumn = cellData.column;\n\n\t\tmodel.change( writer => {\n\t\t\t// Update heading columns attribute if removing a row from head section.\n\t\t\tif ( headingColumns && row <= headingColumns ) {\n\t\t\t\twriter.setAttribute( 'headingColumns', headingColumns - 1, table );\n\t\t\t}\n\n\t\t\tfor ( const { cell, column, colspan } of tableMap ) {\n\t\t\t\t// If colspaned cell overlaps removed column decrease it's span.\n\t\t\t\tif ( column <= removedColumn && colspan > 1 && column + colspan > removedColumn ) {\n\t\t\t\t\tupdateNumericAttribute( 'colspan', colspan - 1, cell, writer );\n\t\t\t\t} else if ( column === removedColumn ) {\n\t\t\t\t\t// The cell in removed column has colspan of 1.\n\t\t\t\t\twriter.remove( cell );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/setheaderrowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport { createEmptyTableCell, findAncestor, updateNumericAttribute } from './utils';\nimport TableWalker from '../tablewalker';\n\n/**\n * The header row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'setTableColumnHeader'` editor command.\n *\n * You can make the row containing the selected cell a [header](https://www.w3.org/TR/html50/tabular-data.html#the-th-element) by executing:\n *\n *\t\teditor.execute( 'setTableRowHeader' );\n *\n * **Note:** All preceding rows will also become headers. If the current row is already a header, executing this command\n * will make it a regular row back again (including the following rows).\n *\n * @extends module:core/command~Command\n */\nexport default class SetHeaderRowCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst isInTable = !!tableCell;\n\n\t\tthis.isEnabled = isInTable;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection} is in a header row.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t\tthis.value = isInTable && this._isInHeading( tableCell, tableCell.parent.parent );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is in a non-header row, the command will set the `headingRows` table attribute to cover that row.\n\t *\n\t * When the selection is already in a header row, it will set `headingRows` so the heading section will end before that row.\n\t *\n\t * @fires execute\n\t * @param {Object} options\n\t * @param {Boolean} [options.forceValue] If set, the command will set (`true`) or unset (`false`) header rows according to `forceValue`\n\t * parameter instead of the current model state.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst currentHeadingRows = table.getAttribute( 'headingRows' ) || 0;\n\t\tconst selectionRow = tableRow.index;\n\n\t\tif ( options.forceValue === this.value ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst headingRowsToSet = this.value ? selectionRow : selectionRow + 1;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( headingRowsToSet ) {\n\t\t\t\t// Changing heading rows requires to check if any of a heading cell is overlapping vertically the table head.\n\t\t\t\t// Any table cell that has a rowspan attribute > 1 will not exceed the table head so we need to fix it in rows below.\n\t\t\t\tconst cellsToSplit = getOverlappingCells( table, headingRowsToSet, currentHeadingRows );\n\n\t\t\t\tfor ( const cell of cellsToSplit ) {\n\t\t\t\t\tsplitHorizontally( cell, headingRowsToSet, writer );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tupdateNumericAttribute( 'headingRows', headingRowsToSet, table, writer, 0 );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if a table cell is in the heading section.\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {module:engine/model/element~Element} table\n\t * @returns {Boolean}\n\t * @private\n\t */\n\t_isInHeading( tableCell, table ) {\n\t\tconst headingRows = parseInt( table.getAttribute( 'headingRows' ) || 0 );\n\n\t\treturn !!headingRows && tableCell.parent.index < headingRows;\n\t}\n}\n\n// Returns cells that span beyond the new heading section.\n//\n// @param {module:engine/model/element~Element} table The table to check.\n// @param {Number} headingRowsToSet New heading rows attribute.\n// @param {Number} currentHeadingRows Current heading rows attribute.\n// @returns {Array.<module:engine/model/element~Element>}\nfunction getOverlappingCells( table, headingRowsToSet, currentHeadingRows ) {\n\tconst cellsToSplit = [];\n\n\tconst startAnalysisRow = headingRowsToSet > currentHeadingRows ? currentHeadingRows : 0;\n\t// We're analyzing only when headingRowsToSet > 0.\n\tconst endAnalysisRow = headingRowsToSet - 1;\n\n\tconst tableWalker = new TableWalker( table, { startRow: startAnalysisRow, endRow: endAnalysisRow } );\n\n\tfor ( const { row, rowspan, cell } of tableWalker ) {\n\t\tif ( rowspan > 1 && row + rowspan > headingRowsToSet ) {\n\t\t\tcellsToSplit.push( cell );\n\t\t}\n\t}\n\n\treturn cellsToSplit;\n}\n\n// Splits the table cell horizontally.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {Number} headingRows\n// @param {module:engine/model/writer~Writer} writer\nfunction splitHorizontally( tableCell, headingRows, writer ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\tconst rowIndex = tableRow.index;\n\n\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) );\n\tconst newRowspan = headingRows - rowIndex;\n\n\tconst attributes = {};\n\n\tconst spanToSet = rowspan - newRowspan;\n\n\tif ( spanToSet > 1 ) {\n\t\tattributes.rowspan = spanToSet;\n\t}\n\n\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\tif ( colspan > 1 ) {\n\t\tattributes.colspan = colspan;\n\t}\n\n\tconst startRow = table.getChildIndex( tableRow );\n\tconst endRow = startRow + newRowspan;\n\tconst tableMap = [ ...new TableWalker( table, { startRow, endRow, includeSpanned: true } ) ];\n\n\tlet columnIndex;\n\n\tfor ( const { row, column, cell, cellIndex } of tableMap ) {\n\t\tif ( cell === tableCell && columnIndex === undefined ) {\n\t\t\tcolumnIndex = column;\n\t\t}\n\n\t\tif ( columnIndex !== undefined && columnIndex === column && row === endRow ) {\n\t\t\tconst tableRow = table.getChild( row );\n\t\t\tconst tableCellPosition = writer.createPositionAt( tableRow, cellIndex );\n\n\t\t\tcreateEmptyTableCell( writer, tableCellPosition, attributes );\n\t\t}\n\t}\n\n\t// Update the rowspan attribute after updating table.\n\tupdateNumericAttribute( 'rowspan', newRowspan, tableCell, writer );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/setheadercolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The header column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'setTableColumnHeader'` editor command.\n *\n * You can make the column containing the selected cell a [header](https://www.w3.org/TR/html50/tabular-data.html#the-th-element)\n * by executing:\n *\n *\t\teditor.execute( 'setTableColumnHeader' );\n *\n * **Note:** All preceding columns will also become headers. If the current column is already a header, executing this command\n * will make it a regular column back again (including the following columns).\n *\n * @extends module:core/command~Command\n */\nexport default class SetHeaderColumnCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\n\t\tconst isInTable = !!tableCell;\n\n\t\tthis.isEnabled = isInTable;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection} is in a header column.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t\tthis.value = isInTable && this._isInHeading( tableCell, tableCell.parent.parent );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is in a non-header column, the command will set the `headingColumns` table attribute to cover that column.\n\t *\n\t * When the selection is already in a header column, it will set `headingColumns` so the heading section will end before that column.\n\t *\n\t * @fires execute\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.forceValue] If set, the command will set (`true`) or unset (`false`) header columns according to\n\t * `forceValue` parameter instead of the current model state.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst { column: selectionColumn } = tableUtils.getCellLocation( tableCell );\n\n\t\tif ( options.forceValue === this.value ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst headingColumnsToSet = this.value ? selectionColumn : selectionColumn + 1;\n\n\t\tmodel.change( writer => {\n\t\t\tupdateNumericAttribute( 'headingColumns', headingColumnsToSet, table, writer, 0 );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if a table cell is in the heading section.\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {module:engine/model/element~Element} table\n\t * @returns {Boolean}\n\t * @private\n\t */\n\t_isInHeading( tableCell, table ) {\n\t\tconst headingColumns = parseInt( table.getAttribute( 'headingColumns' ) || 0 );\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst { column } = tableUtils.getCellLocation( tableCell );\n\n\t\treturn !!headingColumns && column < headingColumns;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tableutils\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport TableWalker from './tablewalker';\nimport { createEmptyTableCell, updateNumericAttribute } from './commands/utils';\n\n/**\n * The table utilities plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableUtils extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'TableUtils';\n\t}\n\n\t/**\n\t * Returns the table cell location as an object with table row and table column indexes.\n\t *\n\t * For instance in the table below:\n\t *\n\t *\t\t 0 1 2 3\n\t *\t\t +---+---+---+---+\n\t *\t\t0 | a | b | c |\n\t *\t\t + + +---+\n\t *\t\t1 | | | d |\n\t *\t\t +---+---+ +---+\n\t *\t\t2 | e | | f |\n\t *\t\t +---+---+---+---+\n\t *\n\t * the method will return:\n\t *\n\t *\t\tconst cellA = table.getNodeByPath( [ 0, 0 ] );\n\t *\t\teditor.plugins.get( 'TableUtils' ).getCellLocation( cellA );\n\t *\t\t// will return { row: 0, column: 0 }\n\t *\n\t *\t\tconst cellD = table.getNodeByPath( [ 1, 0 ] );\n\t *\t\teditor.plugins.get( 'TableUtils' ).getCellLocation( cellD );\n\t *\t\t// will return { row: 1, column: 3 }\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @returns {Object} Returns a `{row, column}` object.\n\t */\n\tgetCellLocation( tableCell ) {\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: rowIndex, endRow: rowIndex } );\n\n\t\tfor ( const { cell, row, column } of tableWalker ) {\n\t\t\tif ( cell === tableCell ) {\n\t\t\t\treturn { row, column };\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates an empty table with proper structure. The table needs to be inserted into the model,\n\t * ie. using {@link module:engine/model/model~Model#insertContent} function.\n\t *\n\t *\t\tmodel.change( ( writer ) => {\n\t *\t\t\t// Create a table of 2 rows and 7 columns:\n\t *\t\t\tconst table = tableUtils.createTable( writer, 2, 7);\n\t *\n\t *\t\t\t// Insert table to the model at the best position taking current selection:\n\t *\t\t\tmodel.insertContent( table );\n\t *\t\t}\n\t *\n\t * @param {module:engine/model/writer~Writer} writer The model writer.\n\t * @param {Number} rows The number of rows to create.\n\t * @param {Number} columns The number of columns to create.\n\t * @returns {module:engine/model/element~Element} The created table element.\n\t */\n\tcreateTable( writer, rows, columns ) {\n\t\tconst table = writer.createElement( 'table' );\n\n\t\tcreateEmptyRows( writer, table, 0, rows, columns );\n\n\t\treturn table;\n\t}\n\n\t/**\n\t * Inserts rows into a table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).insertRows( table, { at: 1, rows: 2 } );\n\t *\n\t * Assuming the table on the left, the above code will transform it to the table on the right:\n\t *\n\t *\t\trow index\n\t *\t\t 0 +---+---+---+ `at` = 1, +---+---+---+ 0\n\t *\t\t | a | b | c | `rows` = 2, | a | b | c |\n\t *\t\t 1 + +---+---+ <-- insert here + +---+---+ 1\n\t *\t\t | | d | e | | | | |\n\t *\t\t 2 + +---+---+ will give: + +---+---+ 2\n\t *\t\t | | f | g | | | | |\n\t *\t\t 3 +---+---+---+ + +---+---+ 3\n\t *\t\t | | d | e |\n\t *\t\t +---+---+---+ 4\n\t *\t\t + + f | g |\n\t *\t\t +---+---+---+ 5\n\t *\n\t * @param {module:engine/model/element~Element} table The table model element where the rows will be inserted.\n\t * @param {Object} options\n\t * @param {Number} [options.at=0] Row index at which the rows will be inserted.\n\t * @param {Number} [options.rows=1] The number of rows to insert.\n\t */\n\tinsertRows( table, options = {} ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst insertAt = options.at || 0;\n\t\tconst rowsToInsert = options.rows || 1;\n\n\t\tmodel.change( writer => {\n\t\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\t\t// Inserting rows inside heading section requires to update `headingRows` attribute as the heading section will grow.\n\t\t\tif ( headingRows > insertAt ) {\n\t\t\t\twriter.setAttribute( 'headingRows', headingRows + rowsToInsert, table );\n\t\t\t}\n\n\t\t\t// Inserting at the end and at the beginning of a table doesn't require to calculate anything special.\n\t\t\tif ( insertAt === 0 || insertAt === table.childCount ) {\n\t\t\t\tcreateEmptyRows( writer, table, insertAt, rowsToInsert, this.getColumns( table ) );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Iterate over all rows above inserted rows in order to check for rowspanned cells.\n\t\t\tconst tableIterator = new TableWalker( table, { endRow: insertAt } );\n\n\t\t\t// Will hold number of cells needed to insert in created rows.\n\t\t\t// The number might be different then table cell width when there are rowspanned cells.\n\t\t\tlet cellsToInsert = 0;\n\n\t\t\tfor ( const { row, rowspan, colspan, cell } of tableIterator ) {\n\t\t\t\tconst isBeforeInsertedRow = row < insertAt;\n\t\t\t\tconst overlapsInsertedRow = row + rowspan > insertAt;\n\n\t\t\t\tif ( isBeforeInsertedRow && overlapsInsertedRow ) {\n\t\t\t\t\t// This cell overlaps inserted rows so we need to expand it further.\n\t\t\t\t\twriter.setAttribute( 'rowspan', rowspan + rowsToInsert, cell );\n\t\t\t\t}\n\n\t\t\t\t// Calculate how many cells to insert based on the width of cells in a row at insert position.\n\t\t\t\t// It might be lower then table width as some cells might overlaps inserted row.\n\t\t\t\t// In the table above the cell 'a' overlaps inserted row so only two empty cells are need to be created.\n\t\t\t\tif ( row === insertAt ) {\n\t\t\t\t\tcellsToInsert += colspan;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcreateEmptyRows( writer, table, insertAt, rowsToInsert, cellsToInsert );\n\t\t} );\n\t}\n\n\t/**\n\t * Inserts columns into a table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).insertColumns( table, { at: 1, columns: 2 } );\n\t *\n\t * Assuming the table on the left, the above code will transform it to the table on the right:\n\t *\n\t *\t\t0 1 2 3 0 1 2 3 4 5\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t| a | b | | a | b |\n\t *\t\t+ +---+ + +---+\n\t *\t\t| | c | | | c |\n\t *\t\t+---+---+---+ will give: +---+---+---+---+---+\n\t *\t\t| d | e | f | | d | | | e | f |\n\t *\t\t+---+ +---+ +---+---+---+ +---+\n\t *\t\t| g | | h | | g | | | | h |\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t| i | | i |\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t ^---- insert here, `at` = 1, `columns` = 2\n\t *\n\t * @param {module:engine/model/element~Element} table The table model element where the columns will be inserted.\n\t * @param {Object} options\n\t * @param {Number} [options.at=0] Column index at which the columns will be inserted.\n\t * @param {Number} [options.columns=1] The number of columns to insert.\n\t */\n\tinsertColumns( table, options = {} ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst insertAt = options.at || 0;\n\t\tconst columnsToInsert = options.columns || 1;\n\n\t\tmodel.change( writer => {\n\t\t\tconst headingColumns = table.getAttribute( 'headingColumns' );\n\n\t\t\t// Inserting columns inside heading section requires to update `headingColumns` attribute as the heading section will grow.\n\t\t\tif ( insertAt < headingColumns ) {\n\t\t\t\twriter.setAttribute( 'headingColumns', headingColumns + columnsToInsert, table );\n\t\t\t}\n\n\t\t\tconst tableColumns = this.getColumns( table );\n\n\t\t\t// Inserting at the end and at the beginning of a table doesn't require to calculate anything special.\n\t\t\tif ( insertAt === 0 || tableColumns === insertAt ) {\n\t\t\t\tfor ( const tableRow of table.getChildren() ) {\n\t\t\t\t\tcreateCells( columnsToInsert, writer, writer.createPositionAt( tableRow, insertAt ? 'end' : 0 ) );\n\t\t\t\t}\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst tableWalker = new TableWalker( table, { column: insertAt, includeSpanned: true } );\n\n\t\t\tfor ( const { row, cell, cellIndex } of tableWalker ) {\n\t\t\t\t// When iterating over column the table walker outputs either:\n\t\t\t\t// - cells at given column index (cell \"e\" from method docs),\n\t\t\t\t// - spanned columns (spanned cell from row between cells \"g\" and \"h\" - spanned by \"e\", only if `includeSpanned: true`),\n\t\t\t\t// - or a cell from the same row which spans over this column (cell \"a\").\n\n\t\t\t\tconst rowspan = parseInt( cell.getAttribute( 'rowspan' ) || 1 );\n\t\t\t\tconst colspan = parseInt( cell.getAttribute( 'colspan' ) || 1 );\n\n\t\t\t\tif ( cell.index !== insertAt && colspan > 1 ) {\n\t\t\t\t\t// If column is different than `insertAt`, it is a cell that spans over an inserted column (cell \"a\" & \"i\").\n\t\t\t\t\t// For such cells expand them by a number of columns inserted.\n\t\t\t\t\twriter.setAttribute( 'colspan', colspan + columnsToInsert, cell );\n\n\t\t\t\t\t// The `includeSpanned` option will output the \"empty\"/spanned column so skip this row already.\n\t\t\t\t\ttableWalker.skipRow( row );\n\n\t\t\t\t\t// This cell will overlap cells in rows below so skip them also (because of `includeSpanned` option) - (cell \"a\")\n\t\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\t\tfor ( let i = row + 1; i < row + rowspan; i++ ) {\n\t\t\t\t\t\t\ttableWalker.skipRow( i );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// It's either cell at this column index or spanned cell by a rowspanned cell from row above.\n\t\t\t\t\t// In table above it's cell \"e\" and a spanned position from row below (empty cell between cells \"g\" and \"h\")\n\t\t\t\t\tconst insertPosition = writer.createPositionAt( table.getChild( row ), cellIndex );\n\n\t\t\t\t\tcreateCells( columnsToInsert, writer, insertPosition );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Divides a table cell vertically into several ones.\n\t *\n\t * The cell will be visually split into more cells by updating colspans of other cells in a column\n\t * and inserting cells (columns) after that cell.\n\t *\n\t * In the table below, if cell \"a\" is split to 3 cells:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * it will result in the table below:\n\t *\n\t *\t\t+---+---+---+---+---+\n\t *\t\t| a | | | b | c |\n\t *\t\t+---+---+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+---+---+\n\t *\n\t * So cell \"d\" will get its `colspan` updated to `3` and 2 cells will be added (2 columns will be created).\n\t *\n\t * Splitting a cell that already has a `colspan` attribute set will distribute the cell `colspan` evenly and the remainder\n\t * will be left to the original cell:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a |\n\t *\t\t+---+---+---+\n\t *\t\t| b | c | d |\n\t *\t\t+---+---+---+\n\t *\n\t * Splitting cell \"a\" with `colspan=3` to 2 cells will create 1 cell with a `colspan=a` and cell \"a\" that will have `colspan=2`:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | |\n\t *\t\t+---+---+---+\n\t *\t\t| b | c | d |\n\t *\t\t+---+---+---+\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {Number} numberOfCells\n\t */\n\tsplitCellVertically( tableCell, numberOfCells = 2 ) {\n\t\tconst model = this.editor.model;\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\t\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\t\tmodel.change( writer => {\n\t\t\t// First check - the cell spans over multiple rows so before doing anything else just split this cell.\n\t\t\tif ( colspan > 1 ) {\n\t\t\t\t// Get spans of new (inserted) cells and span to update of split cell.\n\t\t\t\tconst { newCellsSpan, updatedSpan } = breakSpanEvenly( colspan, numberOfCells );\n\n\t\t\t\tupdateNumericAttribute( 'colspan', updatedSpan, tableCell, writer );\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\t\t\t\tif ( newCellsSpan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = newCellsSpan;\n\t\t\t\t}\n\n\t\t\t\t// Copy rowspan of split cell.\n\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = rowspan;\n\t\t\t\t}\n\n\t\t\t\tconst cellsToInsert = colspan > numberOfCells ? numberOfCells - 1 : colspan - 1;\n\t\t\t\tcreateCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );\n\t\t\t}\n\n\t\t\t// Second check - the cell has colspan of 1 or we need to create more cells then the currently one spans over.\n\t\t\tif ( colspan < numberOfCells ) {\n\t\t\t\tconst cellsToInsert = numberOfCells - colspan;\n\n\t\t\t\t// First step: expand cells on the same column as split cell.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table ) ];\n\n\t\t\t\t// Get the column index of split cell.\n\t\t\t\tconst { column: splitCellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );\n\n\t\t\t\t// Find cells which needs to be expanded vertically - those on the same column or those that spans over split cell's column.\n\t\t\t\tconst cellsToUpdate = tableMap.filter( ( { cell, colspan, column } ) => {\n\t\t\t\t\tconst isOnSameColumn = cell !== tableCell && column === splitCellColumn;\n\t\t\t\t\tconst spansOverColumn = ( column < splitCellColumn && column + colspan > splitCellColumn );\n\n\t\t\t\t\treturn isOnSameColumn || spansOverColumn;\n\t\t\t\t} );\n\n\t\t\t\t// Expand cells vertically.\n\t\t\t\tfor ( const { cell, colspan } of cellsToUpdate ) {\n\t\t\t\t\twriter.setAttribute( 'colspan', colspan + cellsToInsert, cell );\n\t\t\t\t}\n\n\t\t\t\t// Second step: create columns after split cell.\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\n\t\t\t\t// Copy rowspan of split cell.\n\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = rowspan;\n\t\t\t\t}\n\n\t\t\t\tcreateCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );\n\n\t\t\t\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\n\t\t\t\t// Update heading section if split cell is in heading section.\n\t\t\t\tif ( headingColumns > splitCellColumn ) {\n\t\t\t\t\tupdateNumericAttribute( 'headingColumns', headingColumns + cellsToInsert, table, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Divides a table cell horizontally into several ones.\n\t *\n\t * The cell will be visually split into more cells by updating rowspans of other cells in the row and inserting rows with a single cell\n\t * below.\n\t *\n\t * If in the table below cell \"b\" is split to 3 cells:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * It will result in the table below:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+ +\n\t *\t\t| | | |\n\t *\t\t+ +---+ +\n\t *\t\t| | | |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * So cells \"a\" and \"b\" will get their `rowspan` updated to `3` and 2 rows with a single cell will be added.\n\t *\n\t * Splitting a cell that already has a `rowspan` attribute set will distribute the cell `rowspan` evenly and the remainder\n\t * will be left to the original cell:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+---+\n\t *\t\t| | d | e |\n\t *\t\t+ +---+---+\n\t *\t\t| | f | g |\n\t *\t\t+ +---+---+\n\t *\t\t| | h | i |\n\t *\t\t+---+---+---+\n\t *\n\t * Splitting cell \"a\" with `rowspan=4` to 3 cells will create 2 cells with a `rowspan=1` and cell \"a\" will have `rowspan=2`:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+---+\n\t *\t\t| | d | e |\n\t *\t\t+---+---+---+\n\t *\t\t| | f | g |\n\t *\t\t+---+---+---+\n\t *\t\t| | h | i |\n\t *\t\t+---+---+---+\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {Number} numberOfCells\n\t */\n\tsplitCellHorizontally( tableCell, numberOfCells = 2 ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\t\tconst splitCellRow = table.getChildIndex( tableRow );\n\n\t\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\t\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\t\tmodel.change( writer => {\n\t\t\t// First check - the cell spans over multiple rows so before doing anything else just split this cell.\n\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t// Cache table map before updating table.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table, {\n\t\t\t\t\tstartRow: splitCellRow,\n\t\t\t\t\tendRow: splitCellRow + rowspan - 1,\n\t\t\t\t\tincludeSpanned: true\n\t\t\t\t} ) ];\n\n\t\t\t\t// Get spans of new (inserted) cells and span to update of split cell.\n\t\t\t\tconst { newCellsSpan, updatedSpan } = breakSpanEvenly( rowspan, numberOfCells );\n\n\t\t\t\tupdateNumericAttribute( 'rowspan', updatedSpan, tableCell, writer );\n\n\t\t\t\tconst { column: cellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\t\t\t\tif ( newCellsSpan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = newCellsSpan;\n\t\t\t\t}\n\n\t\t\t\t// Copy colspan of split cell.\n\t\t\t\tif ( colspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = colspan;\n\t\t\t\t}\n\n\t\t\t\tfor ( const { column, row, cellIndex } of tableMap ) {\n\t\t\t\t\t// As both newly created cells and the split cell might have rowspan,\n\t\t\t\t\t// the insertion of new cells must go to appropriate rows:\n\t\t\t\t\t//\n\t\t\t\t\t// 1. It's a row after split cell + it's height.\n\t\t\t\t\tconst isAfterSplitCell = row >= splitCellRow + updatedSpan;\n\t\t\t\t\t// 2. Is on the same column.\n\t\t\t\t\tconst isOnSameColumn = column === cellColumn;\n\t\t\t\t\t// 3. And it's row index is after previous cell height.\n\t\t\t\t\tconst isInEvenlySplitRow = ( row + splitCellRow + updatedSpan ) % newCellsSpan === 0;\n\n\t\t\t\t\tif ( isAfterSplitCell && isOnSameColumn && isInEvenlySplitRow ) {\n\t\t\t\t\t\tconst position = writer.createPositionAt( table.getChild( row ), cellIndex );\n\n\t\t\t\t\t\tcreateCells( 1, writer, position, newCellsAttributes );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Second check - the cell has rowspan of 1 or we need to create more cells than the current cell spans over.\n\t\t\tif ( rowspan < numberOfCells ) {\n\t\t\t\t// We already split the cell in check one so here we split to the remaining number of cells only.\n\t\t\t\tconst cellsToInsert = numberOfCells - rowspan;\n\n\t\t\t\t// This check is needed since we need to check if there are any cells from previous rows than spans over this cell's row.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table, { startRow: 0, endRow: splitCellRow } ) ];\n\n\t\t\t\t// First step: expand cells.\n\t\t\t\tfor ( const { cell, rowspan, row } of tableMap ) {\n\t\t\t\t\t// Expand rowspan of cells that are either:\n\t\t\t\t\t// - on the same row as current cell,\n\t\t\t\t\t// - or are below split cell row and overlaps that row.\n\t\t\t\t\tif ( cell !== tableCell && row + rowspan > splitCellRow ) {\n\t\t\t\t\t\tconst rowspanToSet = rowspan + cellsToInsert;\n\n\t\t\t\t\t\twriter.setAttribute( 'rowspan', rowspanToSet, cell );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Second step: create rows with single cell below split cell.\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Copy colspan of split cell.\n\t\t\t\tif ( colspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = colspan;\n\t\t\t\t}\n\n\t\t\t\tcreateEmptyRows( writer, table, splitCellRow + 1, cellsToInsert, 1, newCellsAttributes );\n\n\t\t\t\t// Update heading section if split cell is in heading section.\n\t\t\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\t\t\tif ( headingRows > splitCellRow ) {\n\t\t\t\t\tupdateNumericAttribute( 'headingRows', headingRows + cellsToInsert, table, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns the number of columns for a given table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).getColumns( table );\n\t *\n\t * @param {module:engine/model/element~Element} table The table to analyze.\n\t * @returns {Number}\n\t */\n\tgetColumns( table ) {\n\t\t// Analyze first row only as all the rows should have the same width.\n\t\tconst row = table.getChild( 0 );\n\n\t\treturn [ ...row.getChildren() ].reduce( ( columns, row ) => {\n\t\t\tconst columnWidth = parseInt( row.getAttribute( 'colspan' ) || 1 );\n\n\t\t\treturn columns + columnWidth;\n\t\t}, 0 );\n\t}\n}\n\n// Creates empty rows at the given index in an existing table.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/element~Element} table\n// @param {Number} insertAt Row index of row insertion.\n// @param {Number} rows Number of rows to create.\n// @param {Number} tableCellToInsert Number of cells to insert in each row.\nfunction createEmptyRows( writer, table, insertAt, rows, tableCellToInsert, attributes = {} ) {\n\tfor ( let i = 0; i < rows; i++ ) {\n\t\tconst tableRow = writer.createElement( 'tableRow' );\n\n\t\twriter.insert( tableRow, table, insertAt );\n\n\t\tcreateCells( tableCellToInsert, writer, writer.createPositionAt( tableRow, 'end' ), attributes );\n\t}\n}\n\n// Creates cells at a given position.\n//\n// @param {Number} columns Number of columns to create\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/position~Position} insertPosition\nfunction createCells( cells, writer, insertPosition, attributes = {} ) {\n\tfor ( let i = 0; i < cells; i++ ) {\n\t\tcreateEmptyTableCell( writer, insertPosition, attributes );\n\t}\n}\n\n// Evenly distributes the span of a cell to a number of provided cells.\n// The resulting spans will always be integer values.\n//\n// For instance breaking a span of 7 into 3 cells will return:\n//\n//\t\t{ newCellsSpan: 2, updatedSpan: 3 }\n//\n// as two cells will have a span of 2 and the remainder will go the first cell so its span will change to 3.\n//\n// @param {Number} span Span value do break.\n// @param {Number} numberOfCells Number of resulting spans.\n// @returns {{newCellsSpan: Number, updatedSpan: Number}}\nfunction breakSpanEvenly( span, numberOfCells ) {\n\tif ( span < numberOfCells ) {\n\t\treturn { newCellsSpan: 1, updatedSpan: 1 };\n\t}\n\n\tconst newCellsSpan = Math.floor( span / numberOfCells );\n\tconst updatedSpan = ( span - newCellsSpan * numberOfCells ) + newCellsSpan;\n\n\treturn { newCellsSpan, updatedSpan };\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-layout-post-fixer\n */\n\nimport { createEmptyTableCell, findAncestor, updateNumericAttribute } from './../commands/utils';\nimport TableWalker from './../tablewalker';\n\n/**\n * Injects a table layout post-fixer into the model.\n *\n * The role of the table layout post-fixer is to ensure that the table rows have the correct structure\n * after a {@link module:engine/model/model~Model#change `change()`} block was executed.\n *\n * The correct structure means that:\n *\n * * All table rows have the same size.\n * * None of a table cells that extend vertically beyond their section (either header or body).\n * * A table cell has always at least one element as child.\n *\n * If the table structure is not correct, the post-fixer will automatically correct it in two steps:\n *\n * 1. It will clip table cells that extends beyond it section.\n * 2. It will add empty table cells to those rows which are narrower then the widest table row.\n *\n * ## Clipping overlapping table cells\n *\n * Such situation may occur when pasting a table (or part of a table) to the editor from external sources.\n *\n * For example, see the following table which has the cell (FOO) with the rowspan attribute (2):\n *\n *\t\t<table headingRows=\"1\">\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell rowspan=\"2\"><paragraph>FOO</paragraph></tableCell>\n *\t\t\t\t<tableCell colspan=\"2\"><paragraph>BAR</paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell><paragraph>BAZ</paragraph></tableCell>\n *\t\t\t\t<tableCell><paragraph>XYZ</paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * will be rendered in the view as:\n *\n *\t\t<table>\n *\t\t\t<thead>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td rowspan=\"2\">FOO</td>\n *\t\t\t\t\t<td colspan=\"2\">BAR</td>\n *\t\t\t\t</tr>\n *\t\t\t</thead>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>BAZ</td>\n *\t\t\t\t\t<td>XYZ</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * In the above example the table will be rendered as a table with two rows - one in the header and second one in the body.\n * The table cell (FOO) cannot span over multiple rows as it would expand from the header to the body section.\n * The `rowspan` attribute must be changed to (1). The value (1) is a default value of the `rowspan` attribute\n * so the `rowspan` attribute will be removed from the model.\n *\n * The table cell with BAZ contents will be in the first column of the table.\n *\n * ## Adding missing table cells\n *\n * The table post-fixer will insert empty table cells to equalize table rows sizes (number of columns).\n * The size of a table row is calculated by counting column spans of table cells - both horizontal (from the same row) and\n * vertical (from rows above).\n *\n * In the above example, the table row in the body section of the table is narrower then the row from the header - it has two cells\n * with the default colspan (1). The header row has one cell with colspan (1) and second with colspan (2).\n * The table cell (FOO) does not expand beyond the head section (and as such will be fixed in the first step of this post-fixer).\n * The post-fixer will add a missing table cell to the row in the body section of the table.\n *\n * The table from the above example will be fixed and rendered to the view as below:\n *\n *\t\t<table>\n *\t\t\t<thead>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td rowspan=\"2\">FOO</td>\n *\t\t\t\t\t<td colspan=\"2\">BAR</td>\n *\t\t\t\t</tr>\n *\t\t\t</thead>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>BAZ</td>\n *\t\t\t\t\t<td>XYZ</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * ## Collaboration & Undo - Expectations vs post-fixer results\n *\n * The table post-fixer only ensures proper structure without deeper analysis of the nature of a change. As such, it might lead\n * to a structure which was not intended by the user changes. In particular, it will also fix undo steps (in conjunction with collaboration)\n * in which editor content might not return to the original state.\n *\n * This will usually happen when one or more users changes size of the table.\n *\n * As en example see a table below:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * and user actions:\n *\n * 1. Both user have table with two rows and two columns.\n * 2. User A adds a column at the end of the table - this will insert empty table cells to two rows.\n * 3. User B adds a row at the end of the table- this will insert a row with two empty table cells.\n * 4. Both users will have a table as below:\n *\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * The last row is shorter then others so table post-fixer will add empty row to tha last row:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * Unfortunately undo doesn't know the nature of changes and depending which user will apply post-fixer changes undoing them might lead to\n * broken table. If User B will undo inserting column to a table the undo engine will undo only operations of\n * inserting empty cells to rows from initial table state (row 1 & 2) but the cell in post-fixed row will remain:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * After undo the table post-fixer will detect that two rows are shorter then other and will fix table to:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer after undo)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer after undo)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableLayoutPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => tableLayoutPostFixer( writer, model ) );\n}\n\n// The table layout post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction tableLayoutPostFixer( writer, model ) {\n\tconst changes = model.document.differ.getChanges();\n\n\tlet wasFixed = false;\n\n\t// Do not analyze the same table more then once - may happen for multiple changes in the same table.\n\tconst analyzedTables = new Set();\n\n\tfor ( const entry of changes ) {\n\t\tlet table;\n\n\t\tif ( entry.name == 'table' && entry.type == 'insert' ) {\n\t\t\ttable = entry.position.nodeAfter;\n\t\t}\n\n\t\t// Fix table on adding/removing table cells and rows.\n\t\tif ( entry.name == 'tableRow' || entry.name == 'tableCell' ) {\n\t\t\ttable = findAncestor( 'table', entry.position );\n\t\t}\n\n\t\t// Fix table on any table's attribute change - including attributes of table cells.\n\t\tif ( isTableAttributeEntry( entry ) ) {\n\t\t\ttable = findAncestor( 'table', entry.range.start );\n\t\t}\n\n\t\tif ( table && !analyzedTables.has( table ) ) {\n\t\t\t// Step 1: correct rowspans of table cells if necessary.\n\t\t\t// The wasFixed flag should be true if any of tables in batch was fixed - might be more then one.\n\t\t\twasFixed = fixTableCellsRowspan( table, writer ) || wasFixed;\n\t\t\t// Step 2: fix table rows sizes.\n\t\t\twasFixed = fixTableRowsSizes( table, writer ) || wasFixed;\n\n\t\t\tanalyzedTables.add( table );\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes the invalid value of the rowspan attribute because a table cell cannot vertically extend beyond the table section it belongs to.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean} Returns true if table was fixed.\nfunction fixTableCellsRowspan( table, writer ) {\n\tlet wasFixed = false;\n\n\tconst cellsToTrim = findCellsToTrim( table );\n\n\tif ( cellsToTrim.length ) {\n\t\twasFixed = true;\n\n\t\tfor ( const data of cellsToTrim ) {\n\t\t\tupdateNumericAttribute( 'rowspan', data.rowspan, data.cell, writer, 1 );\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Makes all table rows in a table the same size.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean} Returns true if table was fixed.\nfunction fixTableRowsSizes( table, writer ) {\n\tlet wasFixed = false;\n\n\tconst rowsLengths = getRowsLengths( table );\n\tconst tableSize = rowsLengths[ 0 ];\n\n\tconst isValid = Object.values( rowsLengths ).every( length => length === tableSize );\n\n\tif ( !isValid ) {\n\t\tconst maxColumns = Object.values( rowsLengths ).reduce( ( prev, current ) => current > prev ? current : prev, 0 );\n\n\t\tfor ( const [ rowIndex, size ] of Object.entries( rowsLengths ) ) {\n\t\t\tconst columnsToInsert = maxColumns - size;\n\n\t\t\tif ( columnsToInsert ) {\n\t\t\t\tfor ( let i = 0; i < columnsToInsert; i++ ) {\n\t\t\t\t\tcreateEmptyTableCell( writer, writer.createPositionAt( table.getChild( rowIndex ), 'end' ) );\n\t\t\t\t}\n\n\t\t\t\twasFixed = true;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Searches for the table cells that extends beyond the table section to which they belong to. It will return an array of objects\n// that holds table cells to be trimmed and correct value of a rowspan attribute to set.\n//\n// @param {module:engine/model/element~Element} table\n// @returns {Array.<{{cell, rowspan}}>}\nfunction findCellsToTrim( table ) {\n\tconst headingRows = parseInt( table.getAttribute( 'headingRows' ) || 0 );\n\tconst maxRows = table.childCount;\n\n\tconst cellsToTrim = [];\n\n\tfor ( const { row, rowspan, cell } of new TableWalker( table ) ) {\n\t\t// Skip cells that do not expand over its row.\n\t\tif ( rowspan < 2 ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst isInHeader = row < headingRows;\n\n\t\t// Row limit is either end of header section or whole table as table body is after the header.\n\t\tconst rowLimit = isInHeader ? headingRows : maxRows;\n\n\t\t// If table cell expands over its limit reduce it height to proper value.\n\t\tif ( row + rowspan > rowLimit ) {\n\t\t\tconst newRowspan = rowLimit - row;\n\n\t\t\tcellsToTrim.push( { cell, rowspan: newRowspan } );\n\t\t}\n\t}\n\n\treturn cellsToTrim;\n}\n\n// Returns an object with lengths of rows assigned to the corresponding row index.\n//\n// @param {module:engine/model/element~Element} table\n// @returns {Object}\nfunction getRowsLengths( table ) {\n\tconst lengths = {};\n\n\tfor ( const { row } of new TableWalker( table, { includeSpanned: true } ) ) {\n\t\tif ( !lengths[ row ] ) {\n\t\t\tlengths[ row ] = 0;\n\t\t}\n\n\t\tlengths[ row ] += 1;\n\t}\n\n\treturn lengths;\n}\n\n// Checks if the differ entry for an attribute change is one of table's attributes.\n//\n// @param entry\n// @returns {Boolean}\nfunction isTableAttributeEntry( entry ) {\n\tconst isAttributeType = entry.type === 'attribute';\n\tconst key = entry.attributeKey;\n\n\treturn isAttributeType && ( key === 'headingRows' || key === 'colspan' || key === 'rowspan' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-cell-paragraph-post-fixer\n */\n\n/**\n * Injects a table cell post-fixer into the model which inserts `paragraph` element into empty table cells.\n *\n * A table cell must contain at least one block element as a child. An empty table cell will have empty `paragraph` as a child.\n *\n *\t\t<table>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * Will be fixed to:\n *\n *\t\t<table>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell><paragraph></paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableCellParagraphPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => tableCellContentsPostFixer( writer, model ) );\n}\n\n// The table cell contents post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction tableCellContentsPostFixer( writer, model ) {\n\tconst changes = model.document.differ.getChanges();\n\n\tlet wasFixed = false;\n\n\tfor ( const entry of changes ) {\n\t\tif ( entry.type == 'insert' && entry.name == 'table' ) {\n\t\t\twasFixed = fixTable( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableRow' ) {\n\t\t\twasFixed = fixTableRow( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableCell' ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( checkTableCellChange( entry ) ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.parent, writer ) || wasFixed;\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTable( table, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const row of table.getChildren() ) {\n\t\twasFixed = fixTableRow( row, writer ) || wasFixed;\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table row.\n//\n// @param {module:engine/model/element~Element} tableRow\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTableRow( tableRow, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const tableCell of tableRow.getChildren() ) {\n\t\twasFixed = fixTableCellContent( tableCell, writer ) || wasFixed;\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cell content by:\n// - adding paragraph to a table cell without any child.\n// - wrapping direct $text in <paragraph>.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean}\nfunction fixTableCellContent( tableCell, writer ) {\n\t// Insert paragraph to an empty table cell.\n\tif ( tableCell.childCount == 0 ) {\n\t\twriter.insertElement( 'paragraph', tableCell );\n\n\t\treturn true;\n\t}\n\n\t// Check table cell children for directly placed text nodes.\n\t// Temporary solution. See https://github.com/ckeditor/ckeditor5/issues/1464.\n\tconst textNodes = Array.from( tableCell.getChildren() ).filter( child => child.is( 'text' ) );\n\n\tfor ( const child of textNodes ) {\n\t\twriter.wrap( writer.createRangeOn( child ), 'paragraph' );\n\t}\n\n\t// Return true when there were text nodes to fix.\n\treturn !!textNodes.length;\n}\n\n// Check if differ change should fix table cell. This happens on:\n// - removing content from table cell (ie tableCell can be left empty).\n// - adding text node directly into a table cell.\n//\n// @param {Object} differ change entry\n// @returns {Boolean}\nfunction checkTableCellChange( entry ) {\n\tif ( !entry.position || !entry.position.parent.is( 'tableCell' ) ) {\n\t\treturn false;\n\t}\n\n\treturn entry.type == 'insert' && entry.name == '$text' || entry.type == 'remove';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-cell-refresh-post-fixer\n */\n\n/**\n * Injects a table cell post-fixer into the model which marks the table cell in the differ to have it re-rendered.\n *\n * Model `paragraph` inside a table cell can be rendered as `<span>` or `<p>`. It is rendered as `<span>` if this is the only block\n * element in that table cell and it doesn't have any attributes. It is rendered as `<p>` otherwise.\n *\n * When table cell content changes, for example a second `paragraph` element is added we need to ensure that the first `paragraph` is\n * re-rendered so it changes to `<p>` from `<span>`. The easiest way to do it is to re-render whole table cell.\n *\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableCellRefreshPostFixer( model ) {\n\tmodel.document.registerPostFixer( () => tableCellRefreshPostFixer( model ) );\n}\n\nfunction tableCellRefreshPostFixer( model ) {\n\tconst differ = model.document.differ;\n\n\t// Stores cells to be refreshed so the table cell will be refreshed once for multiple changes.\n\tconst cellsToRefresh = new Set();\n\n\tfor ( const change of differ.getChanges() ) {\n\t\tconst parent = change.type == 'insert' || change.type == 'remove' ? change.position.parent : change.range.start.parent;\n\n\t\tif ( parent.is( 'tableCell' ) && checkRefresh( parent, change.type ) ) {\n\t\t\tcellsToRefresh.add( parent );\n\t\t}\n\t}\n\n\tif ( cellsToRefresh.size ) {\n\t\tfor ( const tableCell of cellsToRefresh.values() ) {\n\t\t\tdiffer.refreshItem( tableCell );\n\t\t}\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Checks if the model table cell requires refreshing to be re-rendered to a proper state in the view.\n//\n// This methods detects changes that will require renaming <span> to <p> (or vice versa) in the view.\n//\n// This method is a simple heuristic that checks only a single change and will sometimes give a false positive result when multiple changes\n// will result in a state that does not require renaming in the view (but will be seen as requiring a refresh).\n//\n// For instance: a `<span>` should be renamed to `<p>` when adding an attribute to a `<paragraph>`.\n// But adding one attribute and removing another one will result in a false positive: the check for added attribute will see one attribute\n// on a paragraph and will falsy qualify such change as adding an attribute to a paragraph without any attribute.\n//\n// @param {module:engine/model/element~Element} tableCell Table cell to check.\n// @param {String} type Type of change.\nfunction checkRefresh( tableCell, type ) {\n\tconst hasInnerParagraph = Array.from( tableCell.getChildren() ).some( child => child.is( 'paragraph' ) );\n\n\t// If there is no paragraph in table cell then the view doesn't require refreshing.\n\t//\n\t// Why? What we really want to achieve is to make all the old paragraphs (which weren't added in this batch) to be\n\t// converted once again, so that the paragraph-in-table-cell converter can correctly create a `<p>` or a `<span>` element.\n\t// If there are no paragraphs in the table cell, we don't care.\n\tif ( !hasInnerParagraph ) {\n\t\treturn false;\n\t}\n\n\t// For attribute change we only refresh if there is a single paragraph as in this case we may want to change existing `<span>` to `<p>`.\n\tif ( type == 'attribute' ) {\n\t\tconst attributesCount = Array.from( tableCell.getChild( 0 ).getAttributeKeys() ).length;\n\n\t\treturn tableCell.childCount === 1 && attributesCount < 2;\n\t}\n\n\t// For other changes (insert, remove) the `<span>` to `<p>` change is needed when:\n\t//\n\t// - another element is added to a single paragraph (childCount becomes >= 2)\n\t// - another element is removed and a single paragraph is left (childCount == 1)\n\treturn tableCell.childCount <= ( type == 'insert' ? 2 : 1 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tableediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport upcastTable, { upcastTableCell } from './converters/upcasttable';\nimport {\n\tdowncastInsertCell,\n\tdowncastInsertRow,\n\tdowncastInsertTable,\n\tdowncastRemoveRow,\n\tdowncastTableHeadingColumnsChange,\n\tdowncastTableHeadingRowsChange\n} from './converters/downcast';\n\nimport InsertTableCommand from './commands/inserttablecommand';\nimport InsertRowCommand from './commands/insertrowcommand';\nimport InsertColumnCommand from './commands/insertcolumncommand';\nimport SplitCellCommand from './commands/splitcellcommand';\nimport MergeCellCommand from './commands/mergecellcommand';\nimport RemoveRowCommand from './commands/removerowcommand';\nimport RemoveColumnCommand from './commands/removecolumncommand';\nimport SetHeaderRowCommand from './commands/setheaderrowcommand';\nimport SetHeaderColumnCommand from './commands/setheadercolumncommand';\nimport { findAncestor } from './commands/utils';\nimport TableUtils from '../src/tableutils';\n\nimport injectTableLayoutPostFixer from './converters/table-layout-post-fixer';\nimport injectTableCellParagraphPostFixer from './converters/table-cell-paragraph-post-fixer';\nimport injectTableCellRefreshPostFixer from './converters/table-cell-refresh-post-fixer';\n\nimport '../theme/tableediting.css';\n\n/**\n * The table editing feature.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'TableEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\t\tconst schema = model.schema;\n\t\tconst conversion = editor.conversion;\n\n\t\tschema.register( 'table', {\n\t\t\tallowWhere: '$block',\n\t\t\tallowAttributes: [ 'headingRows', 'headingColumns' ],\n\t\t\tisLimit: true,\n\t\t\tisObject: true,\n\t\t\tisBlock: true\n\t\t} );\n\n\t\tschema.register( 'tableRow', {\n\t\t\tallowIn: 'table',\n\t\t\tisLimit: true\n\t\t} );\n\n\t\tschema.register( 'tableCell', {\n\t\t\tallowIn: 'tableRow',\n\t\t\tallowAttributes: [ 'colspan', 'rowspan' ],\n\t\t\tisLimit: true\n\t\t} );\n\n\t\t// Allow all $block content inside table cell.\n\t\tschema.extend( '$block', { allowIn: 'tableCell' } );\n\n\t\t// Disallow table in table.\n\t\tschema.addChildCheck( ( context, childDefinition ) => {\n\t\t\tif ( childDefinition.name == 'table' && Array.from( context.getNames() ).includes( 'table' ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t} );\n\n\t\t// Table conversion.\n\t\tconversion.for( 'upcast' ).add( upcastTable() );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertTable( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertTable() );\n\n\t\t// Table row conversion.\n\t\tconversion.for( 'upcast' ).elementToElement( { model: 'tableRow', view: 'tr' } );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertRow( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertRow() );\n\t\tconversion.for( 'downcast' ).add( downcastRemoveRow() );\n\n\t\t// Table cell conversion.\n\t\tconversion.for( 'upcast' ).add( upcastTableCell( 'td' ) );\n\t\tconversion.for( 'upcast' ).add( upcastTableCell( 'th' ) );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertCell( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertCell() );\n\n\t\t// Table attributes conversion.\n\t\tconversion.attributeToAttribute( { model: 'colspan', view: 'colspan' } );\n\t\tconversion.attributeToAttribute( { model: 'rowspan', view: 'rowspan' } );\n\n\t\t// Table heading rows and cols conversion.\n\t\tconversion.for( 'editingDowncast' ).add( downcastTableHeadingColumnsChange( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastTableHeadingColumnsChange() );\n\t\tconversion.for( 'editingDowncast' ).add( downcastTableHeadingRowsChange( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastTableHeadingRowsChange() );\n\n\t\t// Define all the commands.\n\t\teditor.commands.add( 'insertTable', new InsertTableCommand( editor ) );\n\t\teditor.commands.add( 'insertTableRowAbove', new InsertRowCommand( editor, { order: 'above' } ) );\n\t\teditor.commands.add( 'insertTableRowBelow', new InsertRowCommand( editor, { order: 'below' } ) );\n\t\teditor.commands.add( 'insertTableColumnLeft', new InsertColumnCommand( editor, { order: 'left' } ) );\n\t\teditor.commands.add( 'insertTableColumnRight', new InsertColumnCommand( editor, { order: 'right' } ) );\n\n\t\teditor.commands.add( 'removeTableRow', new RemoveRowCommand( editor ) );\n\t\teditor.commands.add( 'removeTableColumn', new RemoveColumnCommand( editor ) );\n\n\t\teditor.commands.add( 'splitTableCellVertically', new SplitCellCommand( editor, { direction: 'vertically' } ) );\n\t\teditor.commands.add( 'splitTableCellHorizontally', new SplitCellCommand( editor, { direction: 'horizontally' } ) );\n\n\t\teditor.commands.add( 'mergeTableCellRight', new MergeCellCommand( editor, { direction: 'right' } ) );\n\t\teditor.commands.add( 'mergeTableCellLeft', new MergeCellCommand( editor, { direction: 'left' } ) );\n\t\teditor.commands.add( 'mergeTableCellDown', new MergeCellCommand( editor, { direction: 'down' } ) );\n\t\teditor.commands.add( 'mergeTableCellUp', new MergeCellCommand( editor, { direction: 'up' } ) );\n\n\t\teditor.commands.add( 'setTableColumnHeader', new SetHeaderColumnCommand( editor ) );\n\t\teditor.commands.add( 'setTableRowHeader', new SetHeaderRowCommand( editor ) );\n\n\t\tinjectTableLayoutPostFixer( model );\n\t\tinjectTableCellRefreshPostFixer( model );\n\t\tinjectTableCellParagraphPostFixer( model );\n\n\t\t// Handle tab key navigation.\n\t\tthis.editor.keystrokes.set( 'Tab', ( ...args ) => this._handleTabOnSelectedTable( ...args ), { priority: 'low' } );\n\t\tthis.editor.keystrokes.set( 'Tab', this._getTabHandler( true ), { priority: 'low' } );\n\t\tthis.editor.keystrokes.set( 'Shift+Tab', this._getTabHandler( false ), { priority: 'low' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ TableUtils ];\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:keydown keydown} events for the <kbd>Tab</kbd> key executed\n\t * when the table widget is selected.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_handleTabOnSelectedTable( domEventData, cancel ) {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\n\t\tif ( !selection.isCollapsed && selection.rangeCount === 1 && selection.getFirstRange().isFlat ) {\n\t\t\tconst selectedElement = selection.getSelectedElement();\n\n\t\t\tif ( !selectedElement || !selectedElement.is( 'table' ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcancel();\n\n\t\t\teditor.model.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( selectedElement.getChild( 0 ).getChild( 0 ) ) );\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a handler for {@link module:engine/view/document~Document#event:keydown keydown} events for the <kbd>Tab</kbd> key executed\n\t * inside table cell.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Whether this handler will move selection to the next cell or previous.\n\t */\n\t_getTabHandler( isForward ) {\n\t\tconst editor = this.editor;\n\n\t\treturn ( domEventData, cancel ) => {\n\t\t\tconst selection = editor.model.document.selection;\n\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\n\t\t\tif ( !tableCell ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcancel();\n\n\t\t\tconst tableRow = tableCell.parent;\n\t\t\tconst table = tableRow.parent;\n\n\t\t\tconst currentRowIndex = table.getChildIndex( tableRow );\n\t\t\tconst currentCellIndex = tableRow.getChildIndex( tableCell );\n\n\t\t\tconst isFirstCellInRow = currentCellIndex === 0;\n\n\t\t\tif ( !isForward && isFirstCellInRow && currentRowIndex === 0 ) {\n\t\t\t\t// It's the first cell of a table - don't do anything (stay in current position).\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst isLastCellInRow = currentCellIndex === tableRow.childCount - 1;\n\t\t\tconst isLastRow = currentRowIndex === table.childCount - 1;\n\n\t\t\tif ( isForward && isLastRow && isLastCellInRow ) {\n\t\t\t\teditor.execute( 'insertTableRowBelow' );\n\n\t\t\t\t// Check if the command actually added a row. If `insertTableRowBelow` execution didn't add a row (because it was disabled\n\t\t\t\t// or it got overwritten) do not change the selection.\n\t\t\t\tif ( currentRowIndex === table.childCount - 1 ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tlet cellToFocus;\n\n\t\t\t// Move to first cell in next row.\n\t\t\tif ( isForward && isLastCellInRow ) {\n\t\t\t\tconst nextRow = table.getChild( currentRowIndex + 1 );\n\n\t\t\t\tcellToFocus = nextRow.getChild( 0 );\n\t\t\t}\n\t\t\t// Move to last cell in a previous row.\n\t\t\telse if ( !isForward && isFirstCellInRow ) {\n\t\t\t\tconst previousRow = table.getChild( currentRowIndex - 1 );\n\n\t\t\t\tcellToFocus = previousRow.getChild( previousRow.childCount - 1 );\n\t\t\t}\n\t\t\t// Move to next/previous cell.\n\t\t\telse {\n\t\t\t\tcellToFocus = tableRow.getChild( currentCellIndex + ( isForward ? 1 : -1 ) );\n\t\t\t}\n\n\t\t\teditor.model.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( cellToFocus ) );\n\t\t\t} );\n\t\t};\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/ui/inserttableview\n */\n\nimport View from '@ckeditor/ckeditor5-ui/src/view';\n\nimport './../../theme/inserttable.css';\n\n/**\n * The table size view.\n *\n * It renders a 10x10 grid to choose the inserted table size.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class InsertTableView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * A collection of table size box items.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.items = this.createCollection();\n\n\t\t/**\n\t\t * The currently selected number of rows of the new table.\n\t\t *\n\t\t * @observable\n\t\t * @member {Number} #rows\n\t\t */\n\t\tthis.set( 'rows', 0 );\n\n\t\t/**\n\t\t * The currently selected number of columns of the new table.\n\t\t *\n\t\t * @observable\n\t\t * @member {Number} #columns\n\t\t */\n\t\tthis.set( 'columns', 0 );\n\n\t\t/**\n\t\t * The label text displayed under the boxes.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #label\n\t\t */\n\t\tthis.bind( 'label' )\n\t\t\t.to( this, 'columns', this, 'rows', ( columns, rows ) => `${ rows } × ${ columns }` );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [ 'ck' ]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [ 'ck-insert-table-dropdown__grid' ]\n\t\t\t\t\t},\n\t\t\t\t\tchildren: this.items\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [ 'ck-insert-table-dropdown__label' ]\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttext: bind.to( 'label' )\n\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t],\n\n\t\t\ton: {\n\t\t\t\tmousedown: bind.to( evt => {\n\t\t\t\t\tevt.preventDefault();\n\t\t\t\t} ),\n\n\t\t\t\tclick: bind.to( () => {\n\t\t\t\t\tthis.fire( 'execute' );\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\n\t\t// Add grid boxes to table selection view.\n\t\tfor ( let index = 0; index < 100; index++ ) {\n\t\t\tconst boxView = new TableSizeGridBoxView();\n\n\t\t\t// Listen to box view 'over' event which indicates that mouse is over this box.\n\t\t\tboxView.on( 'over', () => {\n\t\t\t\t// Translate box index to the row & column index.\n\t\t\t\tconst row = Math.floor( index / 10 );\n\t\t\t\tconst column = index % 10;\n\n\t\t\t\t// As row & column indexes are zero-based transform it to number of selected rows & columns.\n\t\t\t\tthis.set( 'rows', row + 1 );\n\t\t\t\tthis.set( 'columns', column + 1 );\n\t\t\t} );\n\n\t\t\tthis.items.add( boxView );\n\t\t}\n\n\t\tthis.on( 'change:columns', () => {\n\t\t\tthis._highlightGridBoxes();\n\t\t} );\n\n\t\tthis.on( 'change:rows', () => {\n\t\t\tthis._highlightGridBoxes();\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfocus() {\n\t\t// The dropdown panel expects DropdownPanelFocusable interface on views passed to dropdown panel. See #30.\n\t\t// The method should be implemented while working on keyboard support for this view. See #22.\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfocusLast() {\n\t\t// The dropdown panel expects DropdownPanelFocusable interface on views passed to dropdown panel. See #30.\n\t\t// The method should be implemented while working on keyboard support for this view. See #22.\n\t}\n\n\t/**\n\t * Highlights grid boxes depending on rows and columns selected.\n\t *\n\t * @private\n\t */\n\t_highlightGridBoxes() {\n\t\tconst rows = this.rows;\n\t\tconst columns = this.columns;\n\n\t\tthis.items.map( ( boxView, index ) => {\n\t\t\t// Translate box index to the row & column index.\n\t\t\tconst itemRow = Math.floor( index / 10 );\n\t\t\tconst itemColumn = index % 10;\n\n\t\t\t// Grid box is highlighted when its row & column index belongs to selected number of rows & columns.\n\t\t\tconst isOn = itemRow < rows && itemColumn < columns;\n\n\t\t\tboxView.set( 'isOn', isOn );\n\t\t} );\n\t}\n}\n\n/**\n * A single grid box view element.\n *\n * This class is used to render the table size selection grid in {@link module:table/ui/inserttableview~InsertTableView}.\n *\n * @private\n */\nclass TableSizeGridBoxView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the grid box view is \"on\".\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isOn\n\t\t */\n\t\tthis.set( 'isOn', false );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-insert-table-dropdown-grid-box',\n\t\t\t\t\tbind.if( 'isOn', 'ck-on' )\n\t\t\t\t]\n\t\t\t},\n\t\t\ton: {\n\t\t\t\tmouseover: bind.to( 'over' )\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module table/tableui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport {\n addListToDropdown,\n createDropdown\n} from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport Model from '@ckeditor/ckeditor5-ui/src/model';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport InsertTableView from './ui/inserttableview';\nimport tableIcon from './../theme/icons/table.svg';\nimport tableColumnIcon from './../theme/icons/table-column.svg';\nimport tableRowIcon from './../theme/icons/table-row.svg';\nimport tableMergeCellIcon from './../theme/icons/table-merge-cell.svg';\n/**\n * The table UI plugin. It introduces:\n *\n * * The `'insertTable'` dropdown,\n * * The `'tableColumn'` dropdown,\n * * The `'tableRow'` dropdown,\n * * The `'mergeTableCells'` dropdown.\n *\n * The `'tableColumn'`, `'tableRow'`, `'mergeTableCells'` dropdowns work best with {@link module:table/tabletoolbar~TableToolbar}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = this.editor.t;\n const contentLanguageDirection = editor.locale.contentLanguageDirection;\n const isContentLtr = contentLanguageDirection === 'ltr';\n editor.ui.componentFactory.add('insertTable', locale => {\n const command = editor.commands.get('insertTable');\n const dropdownView = createDropdown(locale);\n dropdownView.bind('isEnabled').to(command);\n // Decorate dropdown's button.\n dropdownView.buttonView.set({\n icon: tableIcon,\n label: t('m'),\n tooltip: true\n });\n // Prepare custom view for dropdown's panel.\n const insertTableView = new InsertTableView(locale);\n dropdownView.panelView.children.add(insertTableView);\n insertTableView.delegate('execute').to(dropdownView);\n dropdownView.buttonView.on('open', () => {\n // Reset the chooser before showing it to the user.\n insertTableView.rows = 0;\n insertTableView.columns = 0;\n });\n dropdownView.on('execute', () => {\n editor.execute('insertTable', {\n rows: insertTableView.rows,\n columns: insertTableView.columns\n });\n editor.editing.view.focus();\n });\n return dropdownView;\n });\n editor.ui.componentFactory.add('tableColumn', locale => {\n const options = [\n {\n type: 'switchbutton',\n model: {\n commandName: 'setTableColumnHeader',\n label: t('n'),\n bindIsOn: true\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'insertTableColumnLeft' : 'insertTableColumnRight',\n label: t('o')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'insertTableColumnRight' : 'insertTableColumnLeft',\n label: t('p')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'removeTableColumn',\n label: t('q')\n }\n }\n ];\n return this._prepareDropdown(t('r'), tableColumnIcon, options, locale);\n });\n editor.ui.componentFactory.add('tableRow', locale => {\n const options = [\n {\n type: 'switchbutton',\n model: {\n commandName: 'setTableRowHeader',\n label: t('s'),\n bindIsOn: true\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: 'insertTableRowBelow',\n label: t('t')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'insertTableRowAbove',\n label: t('u')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'removeTableRow',\n label: t('v')\n }\n }\n ];\n return this._prepareDropdown(t('w'), tableRowIcon, options, locale);\n });\n editor.ui.componentFactory.add('mergeTableCells', locale => {\n const options = [\n {\n type: 'button',\n model: {\n commandName: 'mergeTableCellUp',\n label: t('x')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'mergeTableCellRight' : 'mergeTableCellLeft',\n label: t('y')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'mergeTableCellDown',\n label: t('z')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'mergeTableCellLeft' : 'mergeTableCellRight',\n label: t('aa')\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: 'splitTableCellVertically',\n label: t('ab')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'splitTableCellHorizontally',\n label: t('ac')\n }\n }\n ];\n return this._prepareDropdown(t('ad'), tableMergeCellIcon, options, locale);\n });\n }\n /**\n\t * Creates a dropdown view from the set of options.\n\t *\n\t * @private\n\t * @param {String} label The dropdown button label.\n\t * @param {String} icon An icon for the dropdown button.\n\t * @param {Array.<module:ui/dropdown/utils~ListDropdownItemDefinition>} options The list of options for the dropdown.\n\t * @param {module:utils/locale~Locale} locale\n\t * @returns {module:ui/dropdown/dropdownview~DropdownView}\n\t */\n _prepareDropdown(label, icon, options, locale) {\n const editor = this.editor;\n const dropdownView = createDropdown(locale);\n const commands = [];\n // Prepare dropdown list items for list dropdown.\n const itemDefinitions = new Collection();\n for (const option of options) {\n addListOption(option, editor, commands, itemDefinitions);\n }\n addListToDropdown(dropdownView, itemDefinitions);\n // Decorate dropdown's button.\n dropdownView.buttonView.set({\n label,\n icon,\n tooltip: true\n });\n // Make dropdown button disabled when all options are disabled.\n dropdownView.bind('isEnabled').toMany(commands, 'isEnabled', (...areEnabled) => {\n return areEnabled.some(isEnabled => isEnabled);\n });\n this.listenTo(dropdownView, 'execute', evt => {\n editor.execute(evt.source.commandName);\n editor.editing.view.focus();\n });\n return dropdownView;\n }\n}\n// Adds an option to a list view.\n//\n// @param {module:table/tableui~DropdownOption} option Configuration option.\n// @param {module:core/editor/editor~Editor} editor\n// @param {Array.<module:core/command~Command>} commands List of commands to update.\n// @param {Iterable.<module:ui/dropdown/utils~ListDropdownItemDefinition>} itemDefinitions\n// Collection of dropdown items to update with given option.\nfunction addListOption(option, editor, commands, itemDefinitions) {\n const model = option.model = new Model(option.model);\n const {commandName, bindIsOn} = option.model;\n if (option.type !== 'separator') {\n const command = editor.commands.get(commandName);\n commands.push(command);\n model.set({ commandName });\n model.bind('isEnabled').to(command);\n if (bindIsOn) {\n model.bind('isOn').to(command, 'value');\n }\n }\n model.set({ withText: true });\n itemDefinitions.add(option);\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M3 6v3h4V6H3zm0 4v3h4v-3H3zm0 4v3h4v-3H3zm5 3h4v-3H8v3zm5 0h4v-3h-4v3zm4-4v-3h-4v3h4zm0-4V6h-4v3h4zm1.5 8a1.5 1.5 0 0 1-1.5 1.5H3A1.5 1.5 0 0 1 1.5 17V4c.222-.863 1.068-1.5 2-1.5h13c.932 0 1.778.637 2 1.5v13zM12 13v-3H8v3h4zm0-4V6H8v3h4z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n// The editor creator to use.\nimport ClassicEditorBase from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';\n\nimport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\nimport UploadAdapter from '@ckeditor/ckeditor5-adapter-ckfinder/src/uploadadapter';\nimport Autoformat from '@ckeditor/ckeditor5-autoformat/src/autoformat';\nimport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\nimport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\nimport BlockQuote from '@ckeditor/ckeditor5-block-quote/src/blockquote';\nimport CKFinder from '@ckeditor/ckeditor5-ckfinder/src/ckfinder';\nimport EasyImage from '@ckeditor/ckeditor5-easy-image/src/easyimage';\nimport Heading from '@ckeditor/ckeditor5-heading/src/heading';\nimport Image from '@ckeditor/ckeditor5-image/src/image';\nimport ImageCaption from '@ckeditor/ckeditor5-image/src/imagecaption';\nimport ImageStyle from '@ckeditor/ckeditor5-image/src/imagestyle';\nimport ImageToolbar from '@ckeditor/ckeditor5-image/src/imagetoolbar';\nimport ImageUpload from '@ckeditor/ckeditor5-image/src/imageupload';\nimport Indent from '@ckeditor/ckeditor5-indent/src/indent';\nimport Link from '@ckeditor/ckeditor5-link/src/link';\nimport List from '@ckeditor/ckeditor5-list/src/list';\nimport MediaEmbed from '@ckeditor/ckeditor5-media-embed/src/mediaembed';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\nimport PasteFromOffice from '@ckeditor/ckeditor5-paste-from-office/src/pastefromoffice';\nimport Table from '@ckeditor/ckeditor5-table/src/table';\nimport TableToolbar from '@ckeditor/ckeditor5-table/src/tabletoolbar';\n\nexport default class ClassicEditor extends ClassicEditorBase {}\n\n// Plugins to include in the build.\nClassicEditor.builtinPlugins = [\n\tEssentials,\n\tUploadAdapter,\n\tAutoformat,\n\tBold,\n\tItalic,\n\tBlockQuote,\n\tCKFinder,\n\tEasyImage,\n\tHeading,\n\tImage,\n\tImageCaption,\n\tImageStyle,\n\tImageToolbar,\n\tImageUpload,\n\tIndent,\n\tLink,\n\tList,\n\tMediaEmbed,\n\tParagraph,\n\tPasteFromOffice,\n\tTable,\n\tTableToolbar\n];\n\n// Editor configuration.\nClassicEditor.defaultConfig = {\n\ttoolbar: {\n\t\titems: [\n\t\t\t'heading',\n\t\t\t'|',\n\t\t\t'bold',\n\t\t\t'italic',\n\t\t\t'link',\n\t\t\t'bulletedList',\n\t\t\t'numberedList',\n\t\t\t'|',\n\t\t\t'indent',\n\t\t\t'outdent',\n\t\t\t'|',\n\t\t\t'imageUpload',\n\t\t\t'blockQuote',\n\t\t\t'insertTable',\n\t\t\t'mediaEmbed',\n\t\t\t'undo',\n\t\t\t'redo'\n\t\t]\n\t},\n\timage: {\n\t\ttoolbar: [\n\t\t\t'imageStyle:full',\n\t\t\t'imageStyle:side',\n\t\t\t'|',\n\t\t\t'imageTextAlternative'\n\t\t]\n\t},\n\ttable: {\n\t\tcontentToolbar: [\n\t\t\t'tableColumn',\n\t\t\t'tableRow',\n\t\t\t'mergeTableCells'\n\t\t]\n\t},\n\t// This value must be kept in sync with the language defined in webpack.config.js.\n\tlanguage: 'en'\n};\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module essentials/essentials\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport Enter from '@ckeditor/ckeditor5-enter/src/enter';\nimport ShiftEnter from '@ckeditor/ckeditor5-enter/src/shiftenter';\nimport Typing from '@ckeditor/ckeditor5-typing/src/typing';\nimport Undo from '@ckeditor/ckeditor5-undo/src/undo';\n\n/**\n * A plugin including all essential editing features. It represents a set of features that enables similar functionalities\n * to a `<textarea>` element.\n *\n * It includes:\n *\n * * {@link module:clipboard/clipboard~Clipboard},\n * * {@link module:enter/enter~Enter},\n * * {@link module:enter/shiftenter~ShiftEnter},\n * * {@link module:typing/typing~Typing},\n * * {@link module:undo/undo~Undo}.\n *\n * This plugin set does not define any block-level containers (such as {@link module:paragraph/paragraph~Paragraph}).\n * If your editor is supposed to handle block content, make sure to include it.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Essentials extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard, Enter, ShiftEnter, Typing, Undo ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Essentials';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/bold\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BoldEditing from './bold/boldediting';\nimport BoldUI from './bold/boldui';\n\n/**\n * The bold feature.\n *\n * For a detailed overview check the {@glink features/basic-styles Basic styles feature documentation}\n * and the {@glink api/basic-styles package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:basic-styles/bold/boldediting~BoldEditing bold editing feature}\n * and {@link module:basic-styles/bold/boldui~BoldUI bold UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Bold extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ BoldEditing, BoldUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Bold';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/italic\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ItalicEditing from './italic/italicediting';\nimport ItalicUI from './italic/italicui';\n\n/**\n * The italic feature.\n *\n * For a detailed overview check the {@glink features/basic-styles Basic styles feature documentation}\n * and the {@glink api/basic-styles package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:basic-styles/italic/italicediting~ItalicEditing} and\n * {@link module:basic-styles/italic/italicui~ItalicUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Italic extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ItalicEditing, ItalicUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Italic';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquote\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BlockQuoteEditing from './blockquoteediting';\nimport BlockQuoteUI from './blockquoteui';\n\n/**\n * The block quote plugin.\n *\n * For more information about this feature check the {@glink api/block-quote package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:block-quote/blockquoteediting~BlockQuoteEditing block quote editing feature}\n * and {@link module:block-quote/blockquoteui~BlockQuoteUI block quote UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuote extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ BlockQuoteEditing, BlockQuoteUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockQuote';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ckfinder/ckfinder\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport CKFinderUI from './ckfinderui';\nimport CKFinderEditing from './ckfinderediting';\nimport CKFinderUploadAdapter from '@ckeditor/ckeditor5-adapter-ckfinder/src/uploadadapter';\n\n/**\n * The CKFinder feature, a bridge between the CKEditor 5 WYSIWYG editor and the\n * [CKFinder](https://ckeditor.com/ckfinder) file manager and uploader.\n *\n * This is a \"glue\" plugin which enables:\n *\n * * {@link module:ckfinder/ckfinderediting~CKFinderEditing},\n * * {@link module:ckfinder/ckfinderui~CKFinderUI},\n * * {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter}.\n *\n * See the {@glink features/image-upload/ckfinder \"CKFinder integration\" guide} to learn how to configure\n * and use this feature.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload\" guide} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinder extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CKFinder';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ CKFinderEditing, CKFinderUI, CKFinderUploadAdapter ];\n\t}\n}\n\n/**\n * The configuration of the {@link module:ckfinder/ckfinder~CKFinder CKFinder feature}.\n *\n * Read more in {@link module:ckfinder/ckfinder~CKFinderConfig}.\n *\n * @member {module:ckfinder/ckfinder~CKFinderConfig} module:core/editor/editorconfig~EditorConfig#ckfinder\n */\n\n/**\n * The configuration of the {@link module:ckfinder/ckfinder~CKFinder CKFinder feature}\n * and its {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter upload adapter}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tckfinder: {\n *\t\t\t\t\toptions: {\n *\t\t\t\t\t\tresourceType: 'Images'\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface CKFinderConfig\n */\n\n/**\n * The configuration options passed to the CKFinder file manager instance.\n *\n * Check the file manager [documentation](https://ckeditor.com/docs/ckfinder/ckfinder3/#!/api/CKFinder.Config-cfg-language)\n * for the complete list of options.\n *\n * @member {Object} module:ckfinder/ckfinder~CKFinderConfig#options\n */\n\n/**\n * The type of the CKFinder opener method.\n *\n * Supported types are:\n *\n * * `'modal'` – Opens CKFinder in a modal,\n * * `'popup'` – Opens CKFinder in a new \"pop-up\" window.\n *\n * Defaults to `'modal'`.\n *\n * @member {String} module:ckfinder/ckfinder~CKFinderConfig#openerMethod\n */\n\n/**\n * The path (URL) to the connector which handles the file upload in CKFinder file manager.\n * When specified, it enables the automatic upload of resources such as images inserted into the content.\n *\n * For instance, to use CKFinder's\n * [quick upload](https://ckeditor.com/docs/ckfinder/ckfinder3-php/commands.html#command_quick_upload)\n * command, your can use the following (or similar) path:\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tckfinder: {\n *\t\t\t\t\tuploadUrl: '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files&responseType=json'\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * Used by the {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter upload adapter}.\n *\n * @member {String} module:ckfinder/ckfinder~CKFinderConfig#uploadUrl\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module easy-image/easyimage\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport CloudServicesUploadAdapter from './cloudservicesuploadadapter';\nimport Image from '@ckeditor/ckeditor5-image/src/image';\nimport ImageUpload from '@ckeditor/ckeditor5-image/src/imageupload';\n\n/**\n * The Easy Image feature, which makes the image upload in CKEditor 5 possible with virtually zero\n * server setup. A part of the [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/)\n * family.\n *\n * This is a \"glue\" plugin which enables:\n *\n * * {@link module:image/image~Image},\n * * {@link module:image/imageupload~ImageUpload},\n * * {@link module:easy-image/cloudservicesuploadadapter~CloudServicesUploadAdapter}.\n *\n * See the {@glink features/image-upload/easy-image \"Easy Image integration\" guide} to learn how to configure\n * and use this feature.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload\" guide} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * **Note**: After enabling the Easy Image plugin you need to configure the\n * [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/)\n * integration through {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudServices`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class EasyImage extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [\n\t\t\tCloudServicesUploadAdapter,\n\t\t\tImage,\n\t\t\tImageUpload\n\t\t];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'EasyImage';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/heading\n */\n\nimport HeadingEditing from './headingediting';\nimport HeadingUI from './headingui';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport '../theme/heading.css';\n\n/**\n * The headings feature.\n *\n * For a detailed overview, check the {@glink features/headings Headings feature documentation}\n * and the {@glink api/heading package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:heading/headingediting~HeadingEditing heading editing feature}\n * and {@link module:heading/headingui~HeadingUI heading UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Heading extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ HeadingEditing, HeadingUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Heading';\n\t}\n}\n\n/**\n * The configuration of the heading feature. Introduced by the {@link module:heading/headingediting~HeadingEditing} feature.\n *\n * Read more in {@link module:heading/heading~HeadingConfig}.\n *\n * @member {module:heading/heading~HeadingConfig} module:core/editor/editorconfig~EditorConfig#heading\n */\n\n/**\n * The configuration of the heading feature.\n * The option is used by the {@link module:heading/headingediting~HeadingEditing} feature.\n *\n *\t\tClassicEditor\n *\t\t\t.create( {\n * \t\t\t\theading: ... // Heading feature config.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface HeadingConfig\n */\n\n/**\n * The available heading options.\n *\n * The default value is:\n *\n *\t\tconst headingConfig = {\n *\t\t\toptions: [\n *\t\t\t\t{ model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },\n *\t\t\t\t{ model: 'heading1', view: 'h2', title: 'Heading 1', class: 'ck-heading_heading1' },\n *\t\t\t\t{ model: 'heading2', view: 'h3', title: 'Heading 2', class: 'ck-heading_heading2' },\n *\t\t\t\t{ model: 'heading3', view: 'h4', title: 'Heading 3', class: 'ck-heading_heading3' }\n *\t\t\t]\n *\t\t};\n *\n * It defines 3 levels of headings. In the editor model they will use `heading1`, `heading2`, and `heading3` elements.\n * Their respective view elements (so the elements output by the editor) will be: `h2`, `h3`, and `h4`. This means that\n * if you choose \"Heading 1\" in the headings dropdown the editor will turn the current block to `<heading1>` in the model\n * which will result in rendering (and outputting to data) the `<h2>` element.\n *\n * The `title` and `class` properties will be used by the `headings` dropdown to render available options.\n * Usually, the first option in the headings dropdown is the \"Paragraph\" option, hence it's also defined on the list.\n * However, you don't need to define its view representation because it's handled by\n * the {@link module:paragraph/paragraph~Paragraph} feature (which is required by\n * the {@link module:heading/headingediting~HeadingEditing} feature).\n *\n * You can **read more** about configuring heading levels and **see more examples** in\n * the {@glink features/headings Headings} guide.\n *\n * Note: In the model you should always start from `heading1`, regardless of how the headings are represented in the view.\n * That's assumption is used by features like {@link module:autoformat/autoformat~Autoformat} to know which element\n * they should use when applying the first level heading.\n *\n * The defined headings are also available as values passed to the `'heading'` command under their model names.\n * For example, the below code will apply `<heading1>` to the current selection:\n *\n *\t\teditor.execute( 'heading', { value: 'heading1' } );\n *\n * @member {Array.<module:heading/heading~HeadingOption>} module:heading/heading~HeadingConfig#options\n */\n\n/**\n * Heading option descriptor.\n *\n * @typedef {Object} module:heading/heading~HeadingOption\n * @property {String} model Name of the model element to convert.\n * @property {module:engine/view/elementdefinition~ElementDefinition} view Definition of a view element to convert from/to.\n * @property {String} title The user-readable title of the option.\n * @property {String} class The class which will be added to the dropdown item representing this option.\n * @property {String} [icon] Icon used by {@link module:heading/headingbuttonsui~HeadingButtonsUI}. It can be omitted when using\n * the default configuration.\n * @extends module:engine/conversion/conversion~ConverterDefinition\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagecaption\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageCaptionEditing from './imagecaption/imagecaptionediting';\n\nimport '../theme/imagecaption.css';\n\n/**\n * The image caption plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-captions image caption} documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageCaption extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageCaptionEditing ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageCaption';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageStyleEditing from './imagestyle/imagestyleediting';\nimport ImageStyleUI from './imagestyle/imagestyleui';\n\n/**\n * The image style plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-styles image styles} documentation.\n *\n * This is a \"glue\" plugin which loads the {@link module:image/imagestyle/imagestyleediting~ImageStyleEditing}\n * and {@link module:image/imagestyle/imagestyleui~ImageStyleUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyle extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageStyleEditing, ImageStyleUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageStyle';\n\t}\n}\n\n/**\n * Available image styles.\n *\n * The default value is:\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [ 'full', 'side' ]\n *\t\t};\n *\n * which configures two default styles:\n *\n * * the \"full\" style which does not apply any class, e.g. for images styled to span 100% width of the content,\n * * the \"side\" style with the `.image-style-side` CSS class.\n *\n * See {@link module:image/imagestyle/utils~defaultStyles} to learn more about default\n * styles provided by the image feature.\n *\n * The {@link module:image/imagestyle/utils~defaultStyles default styles} can be customized,\n * e.g. to change the icon, title or CSS class of the style. The feature also provides several\n * {@link module:image/imagestyle/utils~defaultIcons default icons} to choose from.\n *\n *\t\timport customIcon from 'custom-icon.svg';\n *\n *\t\t// ...\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [\n *\t\t\t\t// This will only customize the icon of the \"full\" style.\n *\t\t\t\t// Note: 'right' is one of default icons provided by the feature.\n *\t\t\t\t{ name: 'full', icon: 'right' },\n *\n *\t\t\t\t// This will customize the icon, title and CSS class of the default \"side\" style.\n *\t\t\t\t{ name: 'side', icon: customIcon, title: 'My side style', className: 'custom-side-image' }\n *\t\t\t]\n *\t\t};\n *\n * If none of the default styles is good enough, it is possible to define independent custom styles, too:\n *\n *\t\timport fullSizeIcon from '@ckeditor/ckeditor5-core/theme/icons/object-center.svg';\n *\t\timport sideIcon from '@ckeditor/ckeditor5-core/theme/icons/object-right.svg';\n *\n *\t\t// ...\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [\n *\t\t\t\t// A completely custom full size style with no class, used as a default.\n *\t\t\t\t{ name: 'fullSize', title: 'Full size', icon: fullSizeIcon, isDefault: true },\n *\n *\t\t\t\t{ name: 'side', title: 'To the side', icon: sideIcon, className: 'side-image' }\n *\t\t\t]\n *\t\t};\n *\n * Note: Setting `title` to one of {@link module:image/imagestyle/imagestyleui~ImageStyleUI#localizedDefaultStylesTitles}\n * will automatically translate it to the language of the editor.\n *\n * Read more about styling images in the {@glink features/image#image-styles Image styles guide}.\n *\n * The feature creates commands based on defined styles, so you can change the style of a selected image by executing\n * the following command:\n *\n *\t\teditor.execute( 'imageStyle' { value: 'side' } );\n *\n * The feature also creates buttons that execute the commands. So, assuming that you use the\n * default image styles setting, you can {@link module:image/image~ImageConfig#toolbar configure the image toolbar}\n * (or any other toolbar) to contain these options:\n *\n *\t\tconst imageConfig = {\n *\t\t\ttoolbar: [ 'imageStyle:full', 'imageStyle:side' ]\n *\t\t};\n *\n * @member {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} module:image/image~ImageConfig#styles\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetoolbar\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { getSelectedImageWidget } from './image/utils';\nimport WidgetToolbarRepository from '@ckeditor/ckeditor5-widget/src/widgettoolbarrepository';\n/**\n * The image toolbar plugin. It creates and manages the image toolbar (the toolbar displayed when an image is selected).\n *\n * For a detailed overview, check the {@glink features/image#image-contextual-toolbar image contextual toolbar} documentation.\n *\n * Instances of toolbar components (e.g. buttons) are created using the editor's\n * {@link module:ui/componentfactory~ComponentFactory component factory}\n * based on the {@link module:image/image~ImageConfig#toolbar `image.toolbar` configuration option}.\n *\n * The toolbar uses the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageToolbar extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [WidgetToolbarRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageToolbar';\n }\n /**\n\t * @inheritDoc\n\t */\n afterInit() {\n const editor = this.editor;\n const t = editor.t;\n const widgetToolbarRepository = editor.plugins.get(WidgetToolbarRepository);\n widgetToolbarRepository.register('image', {\n ariaLabel: t('b'),\n items: editor.config.get('image.toolbar') || [],\n getRelatedElement: getSelectedImageWidget\n });\n }\n} /**\n * Items to be placed in the image toolbar.\n * This option is used by the {@link module:image/imagetoolbar~ImageToolbar} feature.\n *\n * Assuming that you use the following features:\n *\n * * {@link module:image/imagestyle~ImageStyle} (with a default configuration),\n * * {@link module:image/imagetextalternative~ImageTextAlternative},\n *\n * three toolbar items will be available in {@link module:ui/componentfactory~ComponentFactory}:\n * `'imageStyle:full'`, `'imageStyle:side'`, and `'imageTextAlternative'` so you can configure the toolbar like this:\n *\n *\t\tconst imageConfig = {\n *\t\t\ttoolbar: [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:image/image~ImageConfig#toolbar\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module indent/indent\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport IndentEditing from './indentediting';\nimport IndentUI from './indentui';\n\n/**\n * The indent feature.\n *\n * This plugin acts as a single entry point plugin for other features that implement indentation of elements like lists or paragraphs.\n *\n * The compatible features are:\n *\n * * The {@link module:list/list~List} or {@link module:list/listediting~ListEditing} feature for list indentation.\n * * The {@link module:indent/indentblock~IndentBlock} feature for block indentation.\n *\n * This is a \"glue\" plugin that loads the following plugins:\n *\n * * The {@link module:indent/indentediting~IndentEditing indent editing feature}.\n * * The {@link module:indent/indentui~IndentUI indent UI feature}.\n *\n * The dependent plugins register the `'indent'` and `'outdent'` commands and introduce the `'indent'` and `'outdent'` buttons\n * that allow to increase or decrease text indentation of supported elements.\n *\n * **Note**: In order for the commands and buttons to work, at least one of compatible features is required.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Indent extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Indent';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ IndentEditing, IndentUI ];\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/link\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport LinkEditing from './linkediting';\nimport LinkUI from './linkui';\n\n/**\n * The link plugin.\n *\n * This is a \"glue\" plugin that loads the {@link module:link/linkediting~LinkEditing link editing feature}\n * and {@link module:link/linkui~LinkUI link UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Link extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ LinkEditing, LinkUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Link';\n\t}\n}\n\n/**\n * The configuration of the {@link module:link/link~Link} feature.\n *\n * Read more in {@link module:link/link~LinkConfig}.\n *\n * @member {module:link/link~LinkConfig} module:core/editor/editorconfig~EditorConfig#link\n */\n\n/**\n * The configuration of the {@link module:link/link~Link link feature}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\tlink: ... // Link feature configuration.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n * @interface LinkConfig\n */\n\n/**\n * When set to `true`, the `target=\"blank\"` and `rel=\"noopener noreferrer\"` attributes are automatically added to all external links\n * in the editor. \"External links\" are all links in the editor content starting with `http`, `https`, or `//`.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tlink: {\n *\t\t\t\t\taddTargetToExternalLinks: true\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * Internally, this option activates a predefined {@link module:link/link~LinkConfig#decorators automatic link decorator}\n * that extends all external links with the `target` and `rel` attributes.\n *\n * **Note**: To control the `target` and `rel` attributes of specific links in the edited content, a dedicated\n * {@link module:link/link~LinkDecoratorManualDefinition manual} decorator must be defined in the\n * {@link module:link/link~LinkConfig#decorators `config.link.decorators`} array. In such scenario,\n * the `config.link.addTargetToExternalLinks` option should remain `undefined` or `false` to not interfere with the manual decorator.\n *\n * It is possible to add other {@link module:link/link~LinkDecoratorAutomaticDefinition automatic}\n * or {@link module:link/link~LinkDecoratorManualDefinition manual} link decorators when this option is active.\n *\n * More information about decorators can be found in the {@link module:link/link~LinkConfig#decorators decorators configuration}\n * reference.\n *\n * @default false\n * @member {Boolean} module:link/link~LinkConfig#addTargetToExternalLinks\n */\n\n/**\n * Decorators provide an easy way to configure and manage additional link attributes in the editor content. There are\n * two types of link decorators:\n *\n * * {@link module:link/link~LinkDecoratorAutomaticDefinition Automatic} – They match links against pre–defined rules and\n * manage their attributes based on the results.\n * * {@link module:link/link~LinkDecoratorManualDefinition Manual} – They allow users to control link attributes individually,\n * using the editor UI.\n *\n * Link decorators are defined as objects with key-value pairs, where the key is the name provided for a given decorator and the\n * value is the decorator definition.\n *\n * The name of the decorator also corresponds to the {@glink framework/guides/architecture/editing-engine#text-attributes text attribute}\n * in the model. For instance, the `isExternal` decorator below is represented as a `linkIsExternal` attribute in the model.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tlink: {\n *\t\t\t\t\tdecorators: {\n *\t\t\t\t\t\tisExternal: {\n *\t\t\t\t\t\t\tmode: 'automatic',\n *\t\t\t\t\t\t\tcallback: url => url.startsWith( 'http://' ),\n *\t\t\t\t\t\t\tattributes: {\n *\t\t\t\t\t\t\t\ttarget: '_blank',\n *\t\t\t\t\t\t\t\trel: 'noopener noreferrer'\n *\t\t\t\t\t\t\t}\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\tisDownloadable: {\n *\t\t\t\t\t\t\tmode: 'manual',\n *\t\t\t\t\t\t\tlabel: 'Downloadable',\n *\t\t\t\t\t\t\tattributes: {\n *\t\t\t\t\t\t\t\tdownload: 'file.png',\n *\t\t\t\t\t\t\t}\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t// ...\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * To learn more about the configuration syntax, check out the {@link module:link/link~LinkDecoratorAutomaticDefinition automatic}\n * and {@link module:link/link~LinkDecoratorManualDefinition manual} decorator option reference.\n *\n * **Warning:** Currently, link decorators work independently of one another and no conflict resolution mechanism exists.\n * For example, configuring the `target` attribute using both an automatic and a manual decorator at the same time could end up with\n * quirky results. The same applies if multiple manual or automatic decorators were defined for the same attribute.\n *\n * **Note**: Since the `target` attribute management for external links is a common use case, there is a predefined automatic decorator\n * dedicated for that purpose which can be enabled by turning a single option on. Check out the\n * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}\n * configuration description to learn more.\n *\n * See also the {@glink features/link#custom-link-attributes-decorators link feature guide} for more information.\n *\n * @member {Object.<String, module:link/link~LinkDecoratorDefinition>} module:link/link~LinkConfig#decorators\n */\n\n/**\n * Represents a link decorator definition ({@link module:link/link~LinkDecoratorManualDefinition `'manual'`}\n * or {@link module:link/link~LinkDecoratorAutomaticDefinition `'automatic'`}).\n *\n * @interface LinkDecoratorDefinition\n */\n\n/**\n * Link decorator type.\n *\n * Check out the {@glink features/link#custom-link-attributes-decorators link feature guide} for more information.\n *\n * @member {'manual'|'automatic'} module:link/link~LinkDecoratorDefinition#mode\n */\n\n/**\n * Describes an automatic {@link module:link/link~LinkConfig#decorators link decorator}. This decorator type matches\n * all links in the editor content against a function that decides whether the link should receive a pre–defined set of attributes.\n *\n * It takes an object with key-value pairs of attributes and a callback function that must return a Boolean value based on the link's\n * `href` (URL). When the callback returns `true`, attributes are applied to the link.\n *\n * For example, to add the `target=\"_blank\"` attribute to all links in the editor starting with `http://`, the\n * configuration could look like this:\n *\n *\t\t{\n *\t\t\tmode: 'automatic',\n *\t\t\tcallback: url => url.startsWith( 'http://' ),\n *\t\t\tattributes: {\n *\t\t\t\ttarget: '_blank'\n *\t\t\t}\n *\t\t}\n *\n * **Note**: Since the `target` attribute management for external links is a common use case, there is a predefined automatic decorator\n * dedicated for that purpose that can be enabled by turning a single option on. Check out the\n * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}\n * configuration description to learn more.\n *\n * @typedef {Object} module:link/link~LinkDecoratorAutomaticDefinition\n * @property {'automatic'} mode Link decorator type. It is `'automatic'` for all automatic decorators.\n * @property {Function} callback Takes a `url` as a parameter and returns `true` if the `attributes` should be applied to the link.\n * @property {Object} attributes Key-value pairs used as link attributes added to the output during the\n * {@glink framework/guides/architecture/editing-engine#conversion downcasting}.\n * Attributes should follow the {@link module:engine/view/elementdefinition~ElementDefinition} syntax.\n */\n\n/**\n * Describes a manual {@link module:link/link~LinkConfig#decorators link decorator}. This decorator type is represented in\n * the link feature's {@link module:link/linkui user interface} as a switch that the user can use to control the presence\n * of a predefined set of attributes.\n *\n * For instance, to allow the users to manually control the presence of the `target=\"_blank\"` and\n * `rel=\"noopener noreferrer\"` attributes on specific links, the decorator could look as follows:\n *\n *\t\t{\n *\t\t\tmode: 'manual',\n *\t\t\tlabel: 'Open in a new tab',\n *\t\t\tattributes: {\n *\t\t\t\ttarget: '_blank',\n *\t\t\t\trel: 'noopener noreferrer'\n *\t\t\t}\n *\t\t}\n *\n * @typedef {Object} module:link/link~LinkDecoratorManualDefinition\n * @property {'manual'} mode Link decorator type. It is `'manual'` for all manual decorators.\n * @property {String} label The label of the UI button that the user can use to control the presence of link attributes.\n * @property {Object} attributes Key-value pairs used as link attributes added to the output during the\n * {@glink framework/guides/architecture/editing-engine#conversion downcasting}.\n * Attributes should follow the {@link module:engine/view/elementdefinition~ElementDefinition} syntax.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/list\n */\n\nimport ListEditing from './listediting';\nimport ListUI from './listui';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The list feature.\n *\n * This is a \"glue\" plugin that loads the {@link module:list/listediting~ListEditing list editing feature}\n * and {@link module:list/listui~ListUI list UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class List extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ListEditing, ListUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'List';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaembed\n */\n\nimport MediaEmbedEditing from './mediaembedediting';\nimport AutoMediaEmbed from './automediaembed';\nimport MediaEmbedUI from './mediaembedui';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\n\nimport '../theme/mediaembed.css';\n\n/**\n * The media embed plugin.\n *\n * For a detailed overview, check the {@glink features/media-embed Media Embed feature documentation}.\n *\n * This is a \"glue\" plugin which loads the following plugins:\n *\n * * The {@link module:media-embed/mediaembedediting~MediaEmbedEditing media embed editing feature},\n * * The {@link module:media-embed/mediaembedui~MediaEmbedUI media embed UI feature} and\n * * The {@link module:media-embed/automediaembed~AutoMediaEmbed auto-media embed feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbed extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ MediaEmbedEditing, MediaEmbedUI, AutoMediaEmbed, Widget ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'MediaEmbed';\n\t}\n}\n\n/**\n * The media embed provider descriptor. Used in\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`} and\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}.\n *\n * See {@link module:media-embed/mediaembed~MediaEmbedConfig} to learn more.\n *\n *\t\t{\n *\t\t\tname: 'example',\n *\n *\t\t\t// The following RegExp matches https://www.example.com/media/{media id},\n *\t\t\t// (either with \"http(s)://\" and \"www\" or without), so the valid URLs are:\n *\t\t\t//\n *\t\t\t// * https://www.example.com/media/{media id},\n *\t\t\t// * http://www.example.com/media/{media id},\n *\t\t\t// * www.example.com/media/{media id},\n *\t\t\t// * example.com/media/{media id}\n *\t\t\turl: /^example\\.com\\/media\\/(\\w+)/,\n *\n *\t\t\t// The rendering function of the provider.\n *\t\t\t// Used to represent the media when editing the content (i.e. in the view)\n *\t\t\t// and also in the data output of the editor if semantic data output is disabled.\n *\t\t\thtml: match => `The HTML representing the media with ID=${ match[ 1 ] }.`\n *\t\t}\n *\n * You can allow any sort of media in the editor using the \"allow–all\" `RegExp`.\n * But mind that, since URLs are processed in the order of configuration, if one of the previous\n * `RegExps` matches the URL, it will have a precedence over this one.\n *\n *\t\t{\n *\t\t\tname: 'allow-all',\n *\t\t\turl: /^.+/\n *\t\t}\n *\n * To implement responsive media, you can use the following HTML structure:\n *\n *\t\t{\n *\t\t\t...\n *\t\t\thtml: match =>\n *\t\t\t\t'<div style=\"position:relative; padding-bottom:100%; height:0\">' +\n *\t\t\t\t\t'<iframe src=\"...\" frameborder=\"0\" ' +\n *\t\t\t\t\t\t'style=\"position:absolute; width:100%; height:100%; top:0; left:0\">' +\n *\t\t\t\t\t'</iframe>' +\n *\t\t\t\t'</div>'\n *\t\t}\n *\n * @typedef {Object} module:media-embed/mediaembed~MediaEmbedProvider\n * @property {String} name The name of the provider. Used e.g. when\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#removeProviders removing providers}.\n * @property {RegExp|Array.<RegExp>} url The `RegExp` object (or array of objects) defining the URL of the media.\n * If any URL matches the `RegExp`, it becomes the media in the editor model, as defined by the provider. The result\n * of matching (output of `String.prototype.match()`) is passed to the `html` rendering function of the media.\n *\n * **Note:** You do not need to include the protocol (`http://`, `https://`) and `www` subdomain in your `RegExps`,\n * they are stripped from the URLs before matching anyway.\n * @property {Function} [html] (optional) The rendering function of the media. The function receives the entire matching\n * array from the corresponding `url` `RegExp` as an argument, allowing rendering a dedicated\n * preview of the media identified by a certain ID or a hash. When not defined, the media embed feature\n * will use a generic media representation in the view and output data.\n * Note that when\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#previewsInData `config.mediaEmbed.previewsInData`}\n * is `true`, the rendering function **will always** be used for the media in the editor data output.\n */\n\n/**\n * The configuration of the {@link module:media-embed/mediaembed~MediaEmbed} feature.\n *\n * Read more in {@link module:media-embed/mediaembed~MediaEmbedConfig}.\n *\n * @member {module:media-embed/mediaembed~MediaEmbedConfig} module:core/editor/editorconfig~EditorConfig#mediaEmbed\n */\n\n/**\n * The configuration of the media embed features.\n *\n * Read more about {@glink features/media-embed#configuration configuring the media embed feature}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\tmediaEmbed: ... // Media embed feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface MediaEmbedConfig\n */\n\n/**\n * The default media providers supported by the editor.\n *\n * The names of providers with rendering functions (previews):\n *\n * * \"dailymotion\",\n * * \"spotify\",\n * * \"youtube\",\n * * \"vimeo\"\n *\n * The names of providers without rendering functions:\n *\n * * \"instagram\",\n * * \"twitter\",\n * * \"googleMaps\",\n * * \"flickr\",\n * * \"facebook\"\n *\n * See the {@link module:media-embed/mediaembed~MediaEmbedProvider provider syntax} to learn more about\n * different kinds of media and media providers.\n *\n * **Note**: The default media provider configuration may not support all possible media URLs,\n * only the most common are included.\n *\n * Media without rendering functions are always represented in the data using the \"semantic\" markup. See\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#previewsInData `config.mediaEmbed.previewsInData`} to\n * learn more about possible data outputs.\n *\n * The priority of media providers corresponds to the order of configuration. The first provider\n * to match the URL is always used, even if there are other providers that support a particular URL.\n * The URL is never matched against the remaining providers.\n *\n * To discard **all** default media providers, simply override this configuration with your own\n * {@link module:media-embed/mediaembed~MediaEmbedProvider definitions}:\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tplugins: [ MediaEmbed, ... ],\n *\t\t\t\tmediaEmbed: {\n *\t\t\t\t\tproviders: [\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\t name: 'myProvider',\n *\t\t\t\t\t\t\t url: /^example\\.com\\/media\\/(\\w+)/,\n *\t\t\t\t\t\t\t html: match => '...'\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t...\n * \t\t\t\t\t]\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * You can take inspiration from the default configuration of this feature which you can find in:\n * https://github.com/ckeditor/ckeditor5-media-embed/blob/master/src/mediaembedediting.js\n *\n * To **extend** the list of default providers, use\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}.\n *\n * To **remove** certain providers, use\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#removeProviders `config.mediaEmbed.removeProviders`}.\n *\n * @member {Array.<module:media-embed/mediaembed~MediaEmbedProvider>} module:media-embed/mediaembed~MediaEmbedConfig#providers\n */\n\n/**\n * The additional media providers supported by the editor. This configuration helps extend the default\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tplugins: [ MediaEmbed, ... ],\n *\t\t\t\tmediaEmbed: {\n *\t\t\t\t\textraProviders: [\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\t name: 'extraProvider',\n *\t\t\t\t\t\t\t url: /^example\\.com\\/media\\/(\\w+)/,\n *\t\t\t\t\t\t\t html: match => '...'\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t...\n * \t\t\t\t\t]\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See the {@link module:media-embed/mediaembed~MediaEmbedProvider provider syntax} to learn more.\n *\n * @member {Array.<module:media-embed/mediaembed~MediaEmbedProvider>} module:media-embed/mediaembed~MediaEmbedConfig#extraProviders\n */\n\n/**\n * The list of media providers that should not be used despite being available in\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`} and\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}\n *\n *\t\tmediaEmbed: {\n *\t\t\tremoveProviders: [ 'youtube', 'twitter' ]\n *\t\t}\n *\n * @member {Array.<String>} module:media-embed/mediaembed~MediaEmbedConfig#removeProviders\n */\n\n/**\n * Controls the data format produced by the feature.\n *\n * When `false` (default), the feature produces \"semantic\" data, i.e. it does not include the preview of\n * the media, just the `<oembed>` tag with the `url` attribute:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"https://url\"></oembed>\n *\t\t</figure>\n *\n * When `true`, the media is represented in the output in the same way it looks in the editor,\n * i.e. the media preview is saved to the database:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"https://url\">\n *\t\t\t\t<iframe src=\"https://preview\"></iframe>\n *\t\t\t</div>\n *\t\t</figure>\n *\n * **Note:** Media without preview are always represented in the data using the \"semantic\" markup\n * regardless of the value of the `previewsInData`. Learn more about different kinds of media\n * in the {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`}\n * configuration description.\n *\n * @member {Boolean} [module:media-embed/mediaembed~MediaEmbedConfig#previewsInData=false]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/pastefromoffice\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport GoogleDocsNormalizer from './normalizers/googledocsnormalizer';\nimport MSWordNormalizer from './normalizers/mswordnormalizer';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\n\n/**\n * The Paste from Office plugin.\n *\n * This plugin handles content pasted from Office apps and transforms it (if necessary)\n * to a valid structure which can then be understood by the editor features.\n *\n * Transformation is made by a set of predefined {@link module:paste-from-office/normalizer~Normalizer normalizers}.\n * This plugin includes following normalizers:\n * * {@link module:paste-from-office/normalizers/mswordnormalizer~MSWordNormalizer Microsoft Word normalizer}\n * * {@link module:paste-from-office/normalizers/googledocsnormalizer~GoogleDocsNormalizer Google Docs normalizer}\n *\n * For more information about this feature check the {@glink api/paste-from-office package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class PasteFromOffice extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'PasteFromOffice';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst normalizers = [];\n\n\t\tnormalizers.push( new MSWordNormalizer() );\n\t\tnormalizers.push( new GoogleDocsNormalizer() );\n\n\t\teditor.plugins.get( 'Clipboard' ).on(\n\t\t\t'inputTransformation',\n\t\t\t( evt, data ) => {\n\t\t\t\tif ( data.isTransformedWithPasteFromOffice ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst htmlString = data.dataTransfer.getData( 'text/html' );\n\t\t\t\tconst activeNormalizer = normalizers.find( normalizer => normalizer.isActive( htmlString ) );\n\n\t\t\t\tif ( activeNormalizer ) {\n\t\t\t\t\tactiveNormalizer.execute( data );\n\n\t\t\t\t\tdata.isTransformedWithPasteFromOffice = true;\n\t\t\t\t}\n\t\t\t},\n\t\t\t{ priority: 'high' }\n\t\t);\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/table\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport TableEditing from './tableediting';\nimport TableUI from './tableui';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\n\nimport '../theme/table.css';\n\n/**\n * The table plugin.\n *\n * For a detailed overview, check the {@glink features/table Table feature documentation}.\n *\n * This is a \"glue\" plugin which loads the {@link module:table/tableediting~TableEditing table editing feature}\n * and {@link module:table/tableui~TableUI table UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Table extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ TableEditing, TableUI, Widget ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Table';\n\t}\n}\n\n/**\n * The configuration of the table features. Used by the table features in the `@ckeditor/ckeditor5-table` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\ttable: ... // Table feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface TableConfig\n */\n\n/**\n * The configuration of the {@link module:table/table~Table} feature.\n *\n * Read more in {@link module:table/table~TableConfig}.\n *\n * @member {module:table/table~TableConfig} module:core/editor/editorconfig~EditorConfig#table\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module table/tabletoolbar\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport {\n getSelectedTableWidget,\n getTableWidgetAncestor\n} from './utils';\nimport WidgetToolbarRepository from '@ckeditor/ckeditor5-widget/src/widgettoolbarrepository';\n/**\n * The table toolbar class. It creates toolbars for the table feature and its content (for now only for a table cell content).\n *\n * Table toolbar shows up when a table widget is selected. Its components (e.g. buttons) are created based on the\n * {@link module:table/table~TableConfig#tableToolbar `table.tableToolbar` configuration option}.\n *\n * Table content toolbar shows up when the selection is inside the content of a table. It creates its component based on the\n * {@link module:table/table~TableConfig#contentToolbar `table.contentToolbar` configuration option}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableToolbar extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [WidgetToolbarRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'TableToolbar';\n }\n /**\n\t * @inheritDoc\n\t */\n afterInit() {\n const editor = this.editor;\n const t = editor.t;\n const widgetToolbarRepository = editor.plugins.get(WidgetToolbarRepository);\n const tableContentToolbarItems = editor.config.get('table.contentToolbar');\n const tableToolbarItems = editor.config.get('table.tableToolbar');\n if (tableContentToolbarItems) {\n widgetToolbarRepository.register('tableContent', {\n ariaLabel: t('c'),\n items: tableContentToolbarItems,\n getRelatedElement: getTableWidgetAncestor\n });\n }\n if (tableToolbarItems) {\n widgetToolbarRepository.register('table', {\n ariaLabel: t('c'),\n items: tableToolbarItems,\n getRelatedElement: getSelectedTableWidget\n });\n }\n }\n} /**\n * Items to be placed in the table content toolbar.\n * The {@link module:table/tabletoolbar~TableToolbar} plugin is required to make this toolbar working.\n *\n * Assuming that you use the {@link module:table/tableui~TableUI} feature, the following toolbar items will be available\n * in {@link module:ui/componentfactory~ComponentFactory}:\n *\n * * `'tableRow'`,\n * * `'tableColumn'`,\n * * `'mergeTableCells'`.\n *\n * You can thus configure the toolbar like this:\n *\n *\t\tconst tableConfig = {\n *\t\t\tcontentToolbar: [ 'tableRow', 'tableColumn', 'mergeTableCells' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:table/table~TableConfig#contentToolbar\n */\n /**\n * Items to be placed in the table toolbar.\n * The {@link module:table/tabletoolbar~TableToolbar} plugin is required to make this toolbar working.\n *\n * You can thus configure the toolbar like this:\n *\n *\t\tconst tableConfig = {\n *\t\t\ttableToolbar: [ 'blockQuote' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:table/table~TableConfig#tableToolbar\n */","import arrayWithoutHoles from \"./arrayWithoutHoles\";\nimport iterableToArray from \"./iterableToArray\";\nimport nonIterableSpread from \"./nonIterableSpread\";\nexport default function _toConsumableArray(arr) {\n return arrayWithoutHoles(arr) || iterableToArray(arr) || nonIterableSpread();\n}","export default function _arrayWithoutHoles(arr) {\n if (Array.isArray(arr)) {\n for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) {\n arr2[i] = arr[i];\n }\n\n return arr2;\n }\n}","export default function _iterableToArray(iter) {\n if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter);\n}","export default function _nonIterableSpread() {\n throw new TypeError(\"Invalid attempt to spread non-iterable instance\");\n}","/** @license React v16.12.0\n * react.production.min.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';var h=require(\"object-assign\"),n=\"function\"===typeof 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MIT\n*/\n'use strict';var aa=require(\"react\"),n=require(\"object-assign\"),q=require(\"scheduler\");function u(a){for(var b=\"https://reactjs.org/docs/error-decoder.html?invariant=\"+a,c=1;c<arguments.length;c++)b+=\"&args[]=\"+encodeURIComponent(arguments[c]);return\"Minified React error #\"+a+\"; visit \"+b+\" for the full message or use the non-minified dev environment for full errors and additional helpful warnings.\"}if(!aa)throw Error(u(227));var ba=null,ca={};\nfunction da(){if(ba)for(var a in ca){var b=ca[a],c=ba.indexOf(a);if(!(-1<c))throw Error(u(96,a));if(!ea[c]){if(!b.extractEvents)throw Error(u(97,a));ea[c]=b;c=b.eventTypes;for(var d in c){var e=void 0;var f=c[d],g=b,h=d;if(fa.hasOwnProperty(h))throw Error(u(99,h));fa[h]=f;var k=f.phasedRegistrationNames;if(k){for(e in k)k.hasOwnProperty(e)&&ha(k[e],g,h);e=!0}else f.registrationName?(ha(f.registrationName,g,h),e=!0):e=!1;if(!e)throw Error(u(98,d,a));}}}}\nfunction ha(a,b,c){if(ia[a])throw 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JavaScript Library v3.4.1\n * https://jquery.com/\n *\n * Includes Sizzle.js\n * https://sizzlejs.com/\n *\n * Copyright JS Foundation and other contributors\n * Released under the MIT license\n * https://jquery.org/license\n *\n * Date: 2019-05-01T21:04Z\n */\n( function( global, factory ) {\n\n\t\"use strict\";\n\n\tif ( typeof module === \"object\" && typeof module.exports === \"object\" ) {\n\n\t\t// For CommonJS and CommonJS-like environments where a proper `window`\n\t\t// is present, execute the factory and get jQuery.\n\t\t// For environments that do not have a `window` with a `document`\n\t\t// (such as Node.js), expose a factory as module.exports.\n\t\t// This accentuates the need for the creation of a real `window`.\n\t\t// e.g. var jQuery = require(\"jquery\")(window);\n\t\t// See ticket #14549 for more info.\n\t\tmodule.exports = global.document ?\n\t\t\tfactory( global, true ) :\n\t\t\tfunction( w ) {\n\t\t\t\tif ( !w.document ) {\n\t\t\t\t\tthrow new Error( \"jQuery requires a window with a document\" );\n\t\t\t\t}\n\t\t\t\treturn factory( w );\n\t\t\t};\n\t} else {\n\t\tfactory( global );\n\t}\n\n// Pass this if window is not defined yet\n} )( typeof window !== \"undefined\" ? window : this, function( window, noGlobal ) {\n\n// Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1\n// throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode\n// arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common\n// enough that all such attempts are guarded in a try block.\n\"use strict\";\n\nvar arr = [];\n\nvar document = window.document;\n\nvar getProto = Object.getPrototypeOf;\n\nvar slice = arr.slice;\n\nvar concat = arr.concat;\n\nvar push = arr.push;\n\nvar indexOf = arr.indexOf;\n\nvar class2type = {};\n\nvar toString = class2type.toString;\n\nvar hasOwn = class2type.hasOwnProperty;\n\nvar fnToString = hasOwn.toString;\n\nvar ObjectFunctionString = fnToString.call( Object );\n\nvar support = {};\n\nvar isFunction = function isFunction( obj ) {\n\n // Support: Chrome <=57, Firefox <=52\n // In some browsers, typeof returns \"function\" for HTML <object> elements\n // (i.e., `typeof document.createElement( \"object\" ) === \"function\"`).\n // We don't want to classify *any* DOM node as a function.\n return typeof obj === \"function\" && typeof obj.nodeType !== \"number\";\n };\n\n\nvar isWindow = function isWindow( obj ) {\n\t\treturn obj != null && obj === obj.window;\n\t};\n\n\n\n\n\tvar preservedScriptAttributes = {\n\t\ttype: true,\n\t\tsrc: true,\n\t\tnonce: true,\n\t\tnoModule: true\n\t};\n\n\tfunction DOMEval( code, node, doc ) {\n\t\tdoc = doc || document;\n\n\t\tvar i, val,\n\t\t\tscript = doc.createElement( \"script\" );\n\n\t\tscript.text = code;\n\t\tif ( node ) {\n\t\t\tfor ( i in preservedScriptAttributes ) {\n\n\t\t\t\t// Support: Firefox 64+, Edge 18+\n\t\t\t\t// Some browsers don't support the \"nonce\" property on scripts.\n\t\t\t\t// On the other hand, just using `getAttribute` is not enough as\n\t\t\t\t// the `nonce` attribute is reset to an empty string whenever it\n\t\t\t\t// becomes browsing-context connected.\n\t\t\t\t// See https://github.com/whatwg/html/issues/2369\n\t\t\t\t// See https://html.spec.whatwg.org/#nonce-attributes\n\t\t\t\t// The `node.getAttribute` check was added for the sake of\n\t\t\t\t// `jQuery.globalEval` so that it can fake a nonce-containing node\n\t\t\t\t// via an object.\n\t\t\t\tval = node[ i ] || node.getAttribute && node.getAttribute( i );\n\t\t\t\tif ( val ) {\n\t\t\t\t\tscript.setAttribute( i, val );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tdoc.head.appendChild( script ).parentNode.removeChild( script );\n\t}\n\n\nfunction toType( obj ) {\n\tif ( obj == null ) {\n\t\treturn obj + \"\";\n\t}\n\n\t// Support: Android <=2.3 only (functionish RegExp)\n\treturn typeof obj === \"object\" || typeof obj === \"function\" ?\n\t\tclass2type[ toString.call( obj ) ] || \"object\" :\n\t\ttypeof obj;\n}\n/* global Symbol */\n// Defining this global in .eslintrc.json would create a danger of using the global\n// unguarded in another place, it seems safer to define global only for this module\n\n\n\nvar\n\tversion = \"3.4.1\",\n\n\t// Define a local copy of jQuery\n\tjQuery = function( selector, context ) {\n\n\t\t// The jQuery object is actually just the init constructor 'enhanced'\n\t\t// Need init if jQuery is called (just allow error to be thrown if not included)\n\t\treturn new jQuery.fn.init( selector, context );\n\t},\n\n\t// Support: Android <=4.0 only\n\t// Make sure we trim BOM and NBSP\n\trtrim = /^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g;\n\njQuery.fn = jQuery.prototype = {\n\n\t// The current version of jQuery being used\n\tjquery: version,\n\n\tconstructor: jQuery,\n\n\t// The default length of a jQuery object is 0\n\tlength: 0,\n\n\ttoArray: function() {\n\t\treturn slice.call( this );\n\t},\n\n\t// Get the Nth element in the matched element set OR\n\t// Get the whole matched element set as a clean array\n\tget: function( num ) {\n\n\t\t// Return all the elements in a clean array\n\t\tif ( num == null ) {\n\t\t\treturn slice.call( this );\n\t\t}\n\n\t\t// Return just the one element from the set\n\t\treturn num < 0 ? this[ num + this.length ] : this[ num ];\n\t},\n\n\t// Take an array of elements and push it onto the stack\n\t// (returning the new matched element set)\n\tpushStack: function( elems ) {\n\n\t\t// Build a new jQuery matched element set\n\t\tvar ret = jQuery.merge( this.constructor(), elems );\n\n\t\t// Add the old object onto the stack (as a reference)\n\t\tret.prevObject = this;\n\n\t\t// Return the newly-formed element set\n\t\treturn ret;\n\t},\n\n\t// Execute a callback for every element in the matched set.\n\teach: function( callback ) {\n\t\treturn jQuery.each( this, callback );\n\t},\n\n\tmap: function( callback ) {\n\t\treturn this.pushStack( jQuery.map( this, function( elem, i ) {\n\t\t\treturn callback.call( elem, i, elem );\n\t\t} ) );\n\t},\n\n\tslice: function() {\n\t\treturn this.pushStack( slice.apply( this, arguments ) );\n\t},\n\n\tfirst: function() {\n\t\treturn this.eq( 0 );\n\t},\n\n\tlast: function() {\n\t\treturn this.eq( -1 );\n\t},\n\n\teq: function( i ) {\n\t\tvar len = this.length,\n\t\t\tj = +i + ( i < 0 ? len : 0 );\n\t\treturn this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );\n\t},\n\n\tend: function() {\n\t\treturn this.prevObject || this.constructor();\n\t},\n\n\t// For internal use only.\n\t// Behaves like an Array's method, not like a jQuery method.\n\tpush: push,\n\tsort: arr.sort,\n\tsplice: arr.splice\n};\n\njQuery.extend = jQuery.fn.extend = function() {\n\tvar options, name, src, copy, copyIsArray, clone,\n\t\ttarget = arguments[ 0 ] || {},\n\t\ti = 1,\n\t\tlength = arguments.length,\n\t\tdeep = false;\n\n\t// Handle a deep copy situation\n\tif ( typeof target === \"boolean\" ) {\n\t\tdeep = target;\n\n\t\t// Skip the boolean and the target\n\t\ttarget = arguments[ i ] || {};\n\t\ti++;\n\t}\n\n\t// Handle case when target is a string or something (possible in deep copy)\n\tif ( typeof target !== \"object\" && !isFunction( target ) ) {\n\t\ttarget = {};\n\t}\n\n\t// Extend jQuery itself if only one argument is passed\n\tif ( i === length ) {\n\t\ttarget = this;\n\t\ti--;\n\t}\n\n\tfor ( ; i < length; i++ ) {\n\n\t\t// Only deal with non-null/undefined values\n\t\tif ( ( options = arguments[ i ] ) != null ) {\n\n\t\t\t// Extend the base object\n\t\t\tfor ( name in options ) {\n\t\t\t\tcopy = options[ name ];\n\n\t\t\t\t// Prevent Object.prototype pollution\n\t\t\t\t// Prevent never-ending loop\n\t\t\t\tif ( name === \"__proto__\" || target === copy ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\t// Recurse if we're merging plain objects or arrays\n\t\t\t\tif ( deep && copy && ( jQuery.isPlainObject( copy ) ||\n\t\t\t\t\t( copyIsArray = Array.isArray( copy ) ) ) ) {\n\t\t\t\t\tsrc = target[ name ];\n\n\t\t\t\t\t// Ensure proper type for the source value\n\t\t\t\t\tif ( copyIsArray && !Array.isArray( src ) ) {\n\t\t\t\t\t\tclone = [];\n\t\t\t\t\t} else if ( !copyIsArray && !jQuery.isPlainObject( src ) ) {\n\t\t\t\t\t\tclone = {};\n\t\t\t\t\t} else {\n\t\t\t\t\t\tclone = src;\n\t\t\t\t\t}\n\t\t\t\t\tcopyIsArray = false;\n\n\t\t\t\t\t// Never move original objects, clone them\n\t\t\t\t\ttarget[ name ] = jQuery.extend( deep, clone, copy );\n\n\t\t\t\t// Don't bring in undefined values\n\t\t\t\t} else if ( copy !== undefined ) {\n\t\t\t\t\ttarget[ name ] = copy;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Return the modified object\n\treturn target;\n};\n\njQuery.extend( {\n\n\t// Unique for each copy of jQuery on the page\n\texpando: \"jQuery\" + ( version + Math.random() ).replace( /\\D/g, \"\" ),\n\n\t// Assume jQuery is ready without the ready module\n\tisReady: true,\n\n\terror: function( msg ) {\n\t\tthrow new Error( msg );\n\t},\n\n\tnoop: function() {},\n\n\tisPlainObject: function( obj ) {\n\t\tvar proto, Ctor;\n\n\t\t// Detect obvious negatives\n\t\t// Use toString instead of jQuery.type to catch host objects\n\t\tif ( !obj || toString.call( obj ) !== \"[object Object]\" ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tproto = getProto( obj );\n\n\t\t// Objects with no prototype (e.g., `Object.create( null )`) are plain\n\t\tif ( !proto ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Objects with prototype are plain iff they were constructed by a global Object function\n\t\tCtor = hasOwn.call( proto, \"constructor\" ) && proto.constructor;\n\t\treturn typeof Ctor === \"function\" && fnToString.call( Ctor ) === ObjectFunctionString;\n\t},\n\n\tisEmptyObject: function( obj ) {\n\t\tvar name;\n\n\t\tfor ( name in obj ) {\n\t\t\treturn false;\n\t\t}\n\t\treturn true;\n\t},\n\n\t// Evaluates a script in a global context\n\tglobalEval: function( code, options ) {\n\t\tDOMEval( code, { nonce: options && options.nonce } );\n\t},\n\n\teach: function( obj, callback ) {\n\t\tvar length, i = 0;\n\n\t\tif ( isArrayLike( obj ) ) {\n\t\t\tlength = obj.length;\n\t\t\tfor ( ; i < length; i++ ) {\n\t\t\t\tif ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tfor ( i in obj ) {\n\t\t\t\tif ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn obj;\n\t},\n\n\t// Support: Android <=4.0 only\n\ttrim: function( text ) {\n\t\treturn text == null ?\n\t\t\t\"\" :\n\t\t\t( text + \"\" ).replace( rtrim, \"\" );\n\t},\n\n\t// results is for internal usage only\n\tmakeArray: function( arr, results ) {\n\t\tvar ret = results || [];\n\n\t\tif ( arr != null ) {\n\t\t\tif ( isArrayLike( Object( arr ) ) ) {\n\t\t\t\tjQuery.merge( ret,\n\t\t\t\t\ttypeof arr === \"string\" ?\n\t\t\t\t\t[ arr ] : arr\n\t\t\t\t);\n\t\t\t} else {\n\t\t\t\tpush.call( ret, arr );\n\t\t\t}\n\t\t}\n\n\t\treturn ret;\n\t},\n\n\tinArray: function( elem, arr, i ) {\n\t\treturn arr == null ? -1 : indexOf.call( arr, elem, i );\n\t},\n\n\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t// push.apply(_, arraylike) throws on ancient WebKit\n\tmerge: function( first, second ) {\n\t\tvar len = +second.length,\n\t\t\tj = 0,\n\t\t\ti = first.length;\n\n\t\tfor ( ; j < len; j++ ) {\n\t\t\tfirst[ i++ ] = second[ j ];\n\t\t}\n\n\t\tfirst.length = i;\n\n\t\treturn first;\n\t},\n\n\tgrep: function( elems, callback, invert ) {\n\t\tvar callbackInverse,\n\t\t\tmatches = [],\n\t\t\ti = 0,\n\t\t\tlength = elems.length,\n\t\t\tcallbackExpect = !invert;\n\n\t\t// Go through the array, only saving the items\n\t\t// that pass the validator function\n\t\tfor ( ; i < length; i++ ) {\n\t\t\tcallbackInverse = !callback( elems[ i ], i );\n\t\t\tif ( callbackInverse !== callbackExpect ) {\n\t\t\t\tmatches.push( elems[ i ] );\n\t\t\t}\n\t\t}\n\n\t\treturn matches;\n\t},\n\n\t// arg is for internal usage only\n\tmap: function( elems, callback, arg ) {\n\t\tvar length, value,\n\t\t\ti = 0,\n\t\t\tret = [];\n\n\t\t// Go through the array, translating each of the items to their new values\n\t\tif ( isArrayLike( elems ) ) {\n\t\t\tlength = elems.length;\n\t\t\tfor ( ; i < length; i++ ) {\n\t\t\t\tvalue = callback( elems[ i ], i, arg );\n\n\t\t\t\tif ( value != null ) {\n\t\t\t\t\tret.push( value );\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Go through every key on the object,\n\t\t} else {\n\t\t\tfor ( i in elems ) {\n\t\t\t\tvalue = callback( elems[ i ], i, arg );\n\n\t\t\t\tif ( value != null ) {\n\t\t\t\t\tret.push( value );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Flatten any nested arrays\n\t\treturn concat.apply( [], ret );\n\t},\n\n\t// A global GUID counter for objects\n\tguid: 1,\n\n\t// jQuery.support is not used in Core but other projects attach their\n\t// properties to it so it needs to exist.\n\tsupport: support\n} );\n\nif ( typeof Symbol === \"function\" ) {\n\tjQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];\n}\n\n// Populate the class2type map\njQuery.each( \"Boolean Number String Function Array Date RegExp Object Error Symbol\".split( \" \" ),\nfunction( i, name ) {\n\tclass2type[ \"[object \" + name + \"]\" ] = name.toLowerCase();\n} );\n\nfunction isArrayLike( obj ) {\n\n\t// Support: real iOS 8.2 only (not reproducible in simulator)\n\t// `in` check used to prevent JIT error (gh-2145)\n\t// hasOwn isn't used here due to false negatives\n\t// regarding Nodelist length in IE\n\tvar length = !!obj && \"length\" in obj && obj.length,\n\t\ttype = toType( obj );\n\n\tif ( isFunction( obj ) || isWindow( obj ) ) {\n\t\treturn false;\n\t}\n\n\treturn type === \"array\" || length === 0 ||\n\t\ttypeof length === \"number\" && length > 0 && ( length - 1 ) in obj;\n}\nvar Sizzle =\n/*!\n * Sizzle CSS Selector Engine v2.3.4\n * https://sizzlejs.com/\n *\n * Copyright JS Foundation and other contributors\n * Released under the MIT license\n * https://js.foundation/\n *\n * Date: 2019-04-08\n */\n(function( window ) {\n\nvar i,\n\tsupport,\n\tExpr,\n\tgetText,\n\tisXML,\n\ttokenize,\n\tcompile,\n\tselect,\n\toutermostContext,\n\tsortInput,\n\thasDuplicate,\n\n\t// Local document vars\n\tsetDocument,\n\tdocument,\n\tdocElem,\n\tdocumentIsHTML,\n\trbuggyQSA,\n\trbuggyMatches,\n\tmatches,\n\tcontains,\n\n\t// Instance-specific data\n\texpando = \"sizzle\" + 1 * new Date(),\n\tpreferredDoc = window.document,\n\tdirruns = 0,\n\tdone = 0,\n\tclassCache = createCache(),\n\ttokenCache = createCache(),\n\tcompilerCache = createCache(),\n\tnonnativeSelectorCache = createCache(),\n\tsortOrder = function( a, b ) {\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t}\n\t\treturn 0;\n\t},\n\n\t// Instance methods\n\thasOwn = ({}).hasOwnProperty,\n\tarr = [],\n\tpop = arr.pop,\n\tpush_native = arr.push,\n\tpush = arr.push,\n\tslice = arr.slice,\n\t// Use a stripped-down indexOf as it's faster than native\n\t// https://jsperf.com/thor-indexof-vs-for/5\n\tindexOf = function( list, elem ) {\n\t\tvar i = 0,\n\t\t\tlen = list.length;\n\t\tfor ( ; i < len; i++ ) {\n\t\t\tif ( list[i] === elem ) {\n\t\t\t\treturn i;\n\t\t\t}\n\t\t}\n\t\treturn -1;\n\t},\n\n\tbooleans = \"checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped\",\n\n\t// Regular expressions\n\n\t// http://www.w3.org/TR/css3-selectors/#whitespace\n\twhitespace = \"[\\\\x20\\\\t\\\\r\\\\n\\\\f]\",\n\n\t// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier\n\tidentifier = \"(?:\\\\\\\\.|[\\\\w-]|[^\\0-\\\\xa0])+\",\n\n\t// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors\n\tattributes = \"\\\\[\" + whitespace + \"*(\" + identifier + \")(?:\" + whitespace +\n\t\t// Operator (capture 2)\n\t\t\"*([*^$|!~]?=)\" + whitespace +\n\t\t// \"Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]\"\n\t\t\"*(?:'((?:\\\\\\\\.|[^\\\\\\\\'])*)'|\\\"((?:\\\\\\\\.|[^\\\\\\\\\\\"])*)\\\"|(\" + identifier + \"))|)\" + whitespace +\n\t\t\"*\\\\]\",\n\n\tpseudos = \":(\" + identifier + \")(?:\\\\((\" +\n\t\t// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:\n\t\t// 1. quoted (capture 3; capture 4 or capture 5)\n\t\t\"('((?:\\\\\\\\.|[^\\\\\\\\'])*)'|\\\"((?:\\\\\\\\.|[^\\\\\\\\\\\"])*)\\\")|\" +\n\t\t// 2. simple (capture 6)\n\t\t\"((?:\\\\\\\\.|[^\\\\\\\\()[\\\\]]|\" + attributes + \")*)|\" +\n\t\t// 3. anything else (capture 2)\n\t\t\".*\" +\n\t\t\")\\\\)|)\",\n\n\t// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter\n\trwhitespace = new RegExp( whitespace + \"+\", \"g\" ),\n\trtrim = new RegExp( \"^\" + whitespace + \"+|((?:^|[^\\\\\\\\])(?:\\\\\\\\.)*)\" + whitespace + \"+$\", \"g\" ),\n\n\trcomma = new RegExp( \"^\" + whitespace + \"*,\" + whitespace + \"*\" ),\n\trcombinators = new RegExp( \"^\" + whitespace + \"*([>+~]|\" + whitespace + \")\" + whitespace + \"*\" ),\n\trdescend = new RegExp( whitespace + \"|>\" ),\n\n\trpseudo = new RegExp( pseudos ),\n\tridentifier = new RegExp( \"^\" + identifier + \"$\" ),\n\n\tmatchExpr = {\n\t\t\"ID\": new RegExp( \"^#(\" + identifier + \")\" ),\n\t\t\"CLASS\": new RegExp( \"^\\\\.(\" + identifier + \")\" ),\n\t\t\"TAG\": new RegExp( \"^(\" + identifier + \"|[*])\" ),\n\t\t\"ATTR\": new RegExp( \"^\" + attributes ),\n\t\t\"PSEUDO\": new RegExp( \"^\" + pseudos ),\n\t\t\"CHILD\": new RegExp( \"^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\\\(\" + whitespace +\n\t\t\t\"*(even|odd|(([+-]|)(\\\\d*)n|)\" + whitespace + \"*(?:([+-]|)\" + whitespace +\n\t\t\t\"*(\\\\d+)|))\" + whitespace + \"*\\\\)|)\", \"i\" ),\n\t\t\"bool\": new RegExp( \"^(?:\" + booleans + \")$\", \"i\" ),\n\t\t// For use in libraries implementing .is()\n\t\t// We use this for POS matching in `select`\n\t\t\"needsContext\": new RegExp( \"^\" + whitespace + \"*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\\\(\" +\n\t\t\twhitespace + \"*((?:-\\\\d)?\\\\d*)\" + whitespace + \"*\\\\)|)(?=[^-]|$)\", \"i\" )\n\t},\n\n\trhtml = /HTML$/i,\n\trinputs = /^(?:input|select|textarea|button)$/i,\n\trheader = /^h\\d$/i,\n\n\trnative = /^[^{]+\\{\\s*\\[native \\w/,\n\n\t// Easily-parseable/retrievable ID or TAG or CLASS selectors\n\trquickExpr = /^(?:#([\\w-]+)|(\\w+)|\\.([\\w-]+))$/,\n\n\trsibling = /[+~]/,\n\n\t// CSS escapes\n\t// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters\n\trunescape = new RegExp( \"\\\\\\\\([\\\\da-f]{1,6}\" + whitespace + \"?|(\" + whitespace + \")|.)\", \"ig\" ),\n\tfunescape = function( _, escaped, escapedWhitespace ) {\n\t\tvar high = \"0x\" + escaped - 0x10000;\n\t\t// NaN means non-codepoint\n\t\t// Support: Firefox<24\n\t\t// Workaround erroneous numeric interpretation of +\"0x\"\n\t\treturn high !== high || escapedWhitespace ?\n\t\t\tescaped :\n\t\t\thigh < 0 ?\n\t\t\t\t// BMP codepoint\n\t\t\t\tString.fromCharCode( high + 0x10000 ) :\n\t\t\t\t// Supplemental Plane codepoint (surrogate pair)\n\t\t\t\tString.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );\n\t},\n\n\t// CSS string/identifier serialization\n\t// https://drafts.csswg.org/cssom/#common-serializing-idioms\n\trcssescape = /([\\0-\\x1f\\x7f]|^-?\\d)|^-$|[^\\0-\\x1f\\x7f-\\uFFFF\\w-]/g,\n\tfcssescape = function( ch, asCodePoint ) {\n\t\tif ( asCodePoint ) {\n\n\t\t\t// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER\n\t\t\tif ( ch === \"\\0\" ) {\n\t\t\t\treturn \"\\uFFFD\";\n\t\t\t}\n\n\t\t\t// Control characters and (dependent upon position) numbers get escaped as code points\n\t\t\treturn ch.slice( 0, -1 ) + \"\\\\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + \" \";\n\t\t}\n\n\t\t// Other potentially-special ASCII characters get backslash-escaped\n\t\treturn \"\\\\\" + ch;\n\t},\n\n\t// Used for iframes\n\t// See setDocument()\n\t// Removing the function wrapper causes a \"Permission Denied\"\n\t// error in IE\n\tunloadHandler = function() {\n\t\tsetDocument();\n\t},\n\n\tinDisabledFieldset = addCombinator(\n\t\tfunction( elem ) {\n\t\t\treturn elem.disabled === true && elem.nodeName.toLowerCase() === \"fieldset\";\n\t\t},\n\t\t{ dir: \"parentNode\", next: \"legend\" }\n\t);\n\n// Optimize for push.apply( _, NodeList )\ntry {\n\tpush.apply(\n\t\t(arr = slice.call( preferredDoc.childNodes )),\n\t\tpreferredDoc.childNodes\n\t);\n\t// Support: Android<4.0\n\t// Detect silently failing push.apply\n\tarr[ preferredDoc.childNodes.length ].nodeType;\n} catch ( e ) {\n\tpush = { apply: arr.length ?\n\n\t\t// Leverage slice if possible\n\t\tfunction( target, els ) {\n\t\t\tpush_native.apply( target, slice.call(els) );\n\t\t} :\n\n\t\t// Support: IE<9\n\t\t// Otherwise append directly\n\t\tfunction( target, els ) {\n\t\t\tvar j = target.length,\n\t\t\t\ti = 0;\n\t\t\t// Can't trust NodeList.length\n\t\t\twhile ( (target[j++] = els[i++]) ) {}\n\t\t\ttarget.length = j - 1;\n\t\t}\n\t};\n}\n\nfunction Sizzle( selector, context, results, seed ) {\n\tvar m, i, elem, nid, match, groups, newSelector,\n\t\tnewContext = context && context.ownerDocument,\n\n\t\t// nodeType defaults to 9, since context defaults to document\n\t\tnodeType = context ? context.nodeType : 9;\n\n\tresults = results || [];\n\n\t// Return early from calls with invalid selector or context\n\tif ( typeof selector !== \"string\" || !selector ||\n\t\tnodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {\n\n\t\treturn results;\n\t}\n\n\t// Try to shortcut find operations (as opposed to filters) in HTML documents\n\tif ( !seed ) {\n\n\t\tif ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {\n\t\t\tsetDocument( context );\n\t\t}\n\t\tcontext = context || document;\n\n\t\tif ( documentIsHTML ) {\n\n\t\t\t// If the selector is sufficiently simple, try using a \"get*By*\" DOM method\n\t\t\t// (excepting DocumentFragment context, where the methods don't exist)\n\t\t\tif ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {\n\n\t\t\t\t// ID selector\n\t\t\t\tif ( (m = match[1]) ) {\n\n\t\t\t\t\t// Document context\n\t\t\t\t\tif ( nodeType === 9 ) {\n\t\t\t\t\t\tif ( (elem = context.getElementById( m )) ) {\n\n\t\t\t\t\t\t\t// Support: IE, Opera, Webkit\n\t\t\t\t\t\t\t// TODO: identify versions\n\t\t\t\t\t\t\t// getElementById can match elements by name instead of ID\n\t\t\t\t\t\t\tif ( elem.id === m ) {\n\t\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t// Element context\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// Support: IE, Opera, Webkit\n\t\t\t\t\t\t// TODO: identify versions\n\t\t\t\t\t\t// getElementById can match elements by name instead of ID\n\t\t\t\t\t\tif ( newContext && (elem = newContext.getElementById( m )) &&\n\t\t\t\t\t\t\tcontains( context, elem ) &&\n\t\t\t\t\t\t\telem.id === m ) {\n\n\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t// Type selector\n\t\t\t\t} else if ( match[2] ) {\n\t\t\t\t\tpush.apply( results, context.getElementsByTagName( selector ) );\n\t\t\t\t\treturn results;\n\n\t\t\t\t// Class selector\n\t\t\t\t} else if ( (m = match[3]) && support.getElementsByClassName &&\n\t\t\t\t\tcontext.getElementsByClassName ) {\n\n\t\t\t\t\tpush.apply( results, context.getElementsByClassName( m ) );\n\t\t\t\t\treturn results;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Take advantage of querySelectorAll\n\t\t\tif ( support.qsa &&\n\t\t\t\t!nonnativeSelectorCache[ selector + \" \" ] &&\n\t\t\t\t(!rbuggyQSA || !rbuggyQSA.test( selector )) &&\n\n\t\t\t\t// Support: IE 8 only\n\t\t\t\t// Exclude object elements\n\t\t\t\t(nodeType !== 1 || context.nodeName.toLowerCase() !== \"object\") ) {\n\n\t\t\t\tnewSelector = selector;\n\t\t\t\tnewContext = context;\n\n\t\t\t\t// qSA considers elements outside a scoping root when evaluating child or\n\t\t\t\t// descendant combinators, which is not what we want.\n\t\t\t\t// In such cases, we work around the behavior by prefixing every selector in the\n\t\t\t\t// list with an ID selector referencing the scope context.\n\t\t\t\t// Thanks to Andrew Dupont for this technique.\n\t\t\t\tif ( nodeType === 1 && rdescend.test( selector ) ) {\n\n\t\t\t\t\t// Capture the context ID, setting it first if necessary\n\t\t\t\t\tif ( (nid = context.getAttribute( \"id\" )) ) {\n\t\t\t\t\t\tnid = nid.replace( rcssescape, fcssescape );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tcontext.setAttribute( \"id\", (nid = expando) );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Prefix every selector in the list\n\t\t\t\t\tgroups = tokenize( selector );\n\t\t\t\t\ti = groups.length;\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tgroups[i] = \"#\" + nid + \" \" + toSelector( groups[i] );\n\t\t\t\t\t}\n\t\t\t\t\tnewSelector = groups.join( \",\" );\n\n\t\t\t\t\t// Expand context for sibling selectors\n\t\t\t\t\tnewContext = rsibling.test( selector ) && testContext( context.parentNode ) ||\n\t\t\t\t\t\tcontext;\n\t\t\t\t}\n\n\t\t\t\ttry {\n\t\t\t\t\tpush.apply( results,\n\t\t\t\t\t\tnewContext.querySelectorAll( newSelector )\n\t\t\t\t\t);\n\t\t\t\t\treturn results;\n\t\t\t\t} catch ( qsaError ) {\n\t\t\t\t\tnonnativeSelectorCache( selector, true );\n\t\t\t\t} finally {\n\t\t\t\t\tif ( nid === expando ) {\n\t\t\t\t\t\tcontext.removeAttribute( \"id\" );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// All others\n\treturn select( selector.replace( rtrim, \"$1\" ), context, results, seed );\n}\n\n/**\n * Create key-value caches of limited size\n * @returns {function(string, object)} Returns the Object data after storing it on itself with\n *\tproperty name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)\n *\tdeleting the oldest entry\n */\nfunction createCache() {\n\tvar keys = [];\n\n\tfunction cache( key, value ) {\n\t\t// Use (key + \" \") to avoid collision with native prototype properties (see Issue #157)\n\t\tif ( keys.push( key + \" \" ) > Expr.cacheLength ) {\n\t\t\t// Only keep the most recent entries\n\t\t\tdelete cache[ keys.shift() ];\n\t\t}\n\t\treturn (cache[ key + \" \" ] = value);\n\t}\n\treturn cache;\n}\n\n/**\n * Mark a function for special use by Sizzle\n * @param {Function} fn The function to mark\n */\nfunction markFunction( fn ) {\n\tfn[ expando ] = true;\n\treturn fn;\n}\n\n/**\n * Support testing using an element\n * @param {Function} fn Passed the created element and returns a boolean result\n */\nfunction assert( fn ) {\n\tvar el = document.createElement(\"fieldset\");\n\n\ttry {\n\t\treturn !!fn( el );\n\t} catch (e) {\n\t\treturn false;\n\t} finally {\n\t\t// Remove from its parent by default\n\t\tif ( el.parentNode ) {\n\t\t\tel.parentNode.removeChild( el );\n\t\t}\n\t\t// release memory in IE\n\t\tel = null;\n\t}\n}\n\n/**\n * Adds the same handler for all of the specified attrs\n * @param {String} attrs Pipe-separated list of attributes\n * @param {Function} handler The method that will be applied\n */\nfunction addHandle( attrs, handler ) {\n\tvar arr = attrs.split(\"|\"),\n\t\ti = arr.length;\n\n\twhile ( i-- ) {\n\t\tExpr.attrHandle[ arr[i] ] = handler;\n\t}\n}\n\n/**\n * Checks document order of two siblings\n * @param {Element} a\n * @param {Element} b\n * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b\n */\nfunction siblingCheck( a, b ) {\n\tvar cur = b && a,\n\t\tdiff = cur && a.nodeType === 1 && b.nodeType === 1 &&\n\t\t\ta.sourceIndex - b.sourceIndex;\n\n\t// Use IE sourceIndex if available on both nodes\n\tif ( diff ) {\n\t\treturn diff;\n\t}\n\n\t// Check if b follows a\n\tif ( cur ) {\n\t\twhile ( (cur = cur.nextSibling) ) {\n\t\t\tif ( cur === b ) {\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn a ? 1 : -1;\n}\n\n/**\n * Returns a function to use in pseudos for input types\n * @param {String} type\n */\nfunction createInputPseudo( type ) {\n\treturn function( elem ) {\n\t\tvar name = elem.nodeName.toLowerCase();\n\t\treturn name === \"input\" && elem.type === type;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for buttons\n * @param {String} type\n */\nfunction createButtonPseudo( type ) {\n\treturn function( elem ) {\n\t\tvar name = elem.nodeName.toLowerCase();\n\t\treturn (name === \"input\" || name === \"button\") && elem.type === type;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for :enabled/:disabled\n * @param {Boolean} disabled true for :disabled; false for :enabled\n */\nfunction createDisabledPseudo( disabled ) {\n\n\t// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable\n\treturn function( elem ) {\n\n\t\t// Only certain elements can match :enabled or :disabled\n\t\t// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled\n\t\t// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled\n\t\tif ( \"form\" in elem ) {\n\n\t\t\t// Check for inherited disabledness on relevant non-disabled elements:\n\t\t\t// * listed form-associated elements in a disabled fieldset\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#category-listed\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled\n\t\t\t// * option elements in a disabled optgroup\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled\n\t\t\t// All such elements have a \"form\" property.\n\t\t\tif ( elem.parentNode && elem.disabled === false ) {\n\n\t\t\t\t// Option elements defer to a parent optgroup if present\n\t\t\t\tif ( \"label\" in elem ) {\n\t\t\t\t\tif ( \"label\" in elem.parentNode ) {\n\t\t\t\t\t\treturn elem.parentNode.disabled === disabled;\n\t\t\t\t\t} else {\n\t\t\t\t\t\treturn elem.disabled === disabled;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Support: IE 6 - 11\n\t\t\t\t// Use the isDisabled shortcut property to check for disabled fieldset ancestors\n\t\t\t\treturn elem.isDisabled === disabled ||\n\n\t\t\t\t\t// Where there is no isDisabled, check manually\n\t\t\t\t\t/* jshint -W018 */\n\t\t\t\t\telem.isDisabled !== !disabled &&\n\t\t\t\t\t\tinDisabledFieldset( elem ) === disabled;\n\t\t\t}\n\n\t\t\treturn elem.disabled === disabled;\n\n\t\t// Try to winnow out elements that can't be disabled before trusting the disabled property.\n\t\t// Some victims get caught in our net (label, legend, menu, track), but it shouldn't\n\t\t// even exist on them, let alone have a boolean value.\n\t\t} else if ( \"label\" in elem ) {\n\t\t\treturn elem.disabled === disabled;\n\t\t}\n\n\t\t// Remaining elements are neither :enabled nor :disabled\n\t\treturn false;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for positionals\n * @param {Function} fn\n */\nfunction createPositionalPseudo( fn ) {\n\treturn markFunction(function( argument ) {\n\t\targument = +argument;\n\t\treturn markFunction(function( seed, matches ) {\n\t\t\tvar j,\n\t\t\t\tmatchIndexes = fn( [], seed.length, argument ),\n\t\t\t\ti = matchIndexes.length;\n\n\t\t\t// Match elements found at the specified indexes\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( seed[ (j = matchIndexes[i]) ] ) {\n\t\t\t\t\tseed[j] = !(matches[j] = seed[j]);\n\t\t\t\t}\n\t\t\t}\n\t\t});\n\t});\n}\n\n/**\n * Checks a node for validity as a Sizzle context\n * @param {Element|Object=} context\n * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value\n */\nfunction testContext( context ) {\n\treturn context && typeof context.getElementsByTagName !== \"undefined\" && context;\n}\n\n// Expose support vars for convenience\nsupport = Sizzle.support = {};\n\n/**\n * Detects XML nodes\n * @param {Element|Object} elem An element or a document\n * @returns {Boolean} True iff elem is a non-HTML XML node\n */\nisXML = Sizzle.isXML = function( elem ) {\n\tvar namespace = elem.namespaceURI,\n\t\tdocElem = (elem.ownerDocument || elem).documentElement;\n\n\t// Support: IE <=8\n\t// Assume HTML when documentElement doesn't yet exist, such as inside loading iframes\n\t// https://bugs.jquery.com/ticket/4833\n\treturn !rhtml.test( namespace || docElem && docElem.nodeName || \"HTML\" );\n};\n\n/**\n * Sets document-related variables once based on the current document\n * @param {Element|Object} [doc] An element or document object to use to set the document\n * @returns {Object} Returns the current document\n */\nsetDocument = Sizzle.setDocument = function( node ) {\n\tvar hasCompare, subWindow,\n\t\tdoc = node ? node.ownerDocument || node : preferredDoc;\n\n\t// Return early if doc is invalid or already selected\n\tif ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {\n\t\treturn document;\n\t}\n\n\t// Update global variables\n\tdocument = doc;\n\tdocElem = document.documentElement;\n\tdocumentIsHTML = !isXML( document );\n\n\t// Support: IE 9-11, Edge\n\t// Accessing iframe documents after unload throws \"permission denied\" errors (jQuery #13936)\n\tif ( preferredDoc !== document &&\n\t\t(subWindow = document.defaultView) && subWindow.top !== subWindow ) {\n\n\t\t// Support: IE 11, Edge\n\t\tif ( subWindow.addEventListener ) {\n\t\t\tsubWindow.addEventListener( \"unload\", unloadHandler, false );\n\n\t\t// Support: IE 9 - 10 only\n\t\t} else if ( subWindow.attachEvent ) {\n\t\t\tsubWindow.attachEvent( \"onunload\", unloadHandler );\n\t\t}\n\t}\n\n\t/* Attributes\n\t---------------------------------------------------------------------- */\n\n\t// Support: IE<8\n\t// Verify that getAttribute really returns attributes and not properties\n\t// (excepting IE8 booleans)\n\tsupport.attributes = assert(function( el ) {\n\t\tel.className = \"i\";\n\t\treturn !el.getAttribute(\"className\");\n\t});\n\n\t/* getElement(s)By*\n\t---------------------------------------------------------------------- */\n\n\t// Check if getElementsByTagName(\"*\") returns only elements\n\tsupport.getElementsByTagName = assert(function( el ) {\n\t\tel.appendChild( document.createComment(\"\") );\n\t\treturn !el.getElementsByTagName(\"*\").length;\n\t});\n\n\t// Support: IE<9\n\tsupport.getElementsByClassName = rnative.test( document.getElementsByClassName );\n\n\t// Support: IE<10\n\t// Check if getElementById returns elements by name\n\t// The broken getElementById methods don't pick up programmatically-set names,\n\t// so use a roundabout getElementsByName test\n\tsupport.getById = assert(function( el ) {\n\t\tdocElem.appendChild( el ).id = expando;\n\t\treturn !document.getElementsByName || !document.getElementsByName( expando ).length;\n\t});\n\n\t// ID filter and find\n\tif ( support.getById ) {\n\t\tExpr.filter[\"ID\"] = function( id ) {\n\t\t\tvar attrId = id.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\treturn elem.getAttribute(\"id\") === attrId;\n\t\t\t};\n\t\t};\n\t\tExpr.find[\"ID\"] = function( id, context ) {\n\t\t\tif ( typeof context.getElementById !== \"undefined\" && documentIsHTML ) {\n\t\t\t\tvar elem = context.getElementById( id );\n\t\t\t\treturn elem ? [ elem ] : [];\n\t\t\t}\n\t\t};\n\t} else {\n\t\tExpr.filter[\"ID\"] = function( id ) {\n\t\t\tvar attrId = id.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\tvar node = typeof elem.getAttributeNode !== \"undefined\" &&\n\t\t\t\t\telem.getAttributeNode(\"id\");\n\t\t\t\treturn node && node.value === attrId;\n\t\t\t};\n\t\t};\n\n\t\t// Support: IE 6 - 7 only\n\t\t// getElementById is not reliable as a find shortcut\n\t\tExpr.find[\"ID\"] = function( id, context ) {\n\t\t\tif ( typeof context.getElementById !== \"undefined\" && documentIsHTML ) {\n\t\t\t\tvar node, i, elems,\n\t\t\t\t\telem = context.getElementById( id );\n\n\t\t\t\tif ( elem ) {\n\n\t\t\t\t\t// Verify the id attribute\n\t\t\t\t\tnode = elem.getAttributeNode(\"id\");\n\t\t\t\t\tif ( node && node.value === id ) {\n\t\t\t\t\t\treturn [ elem ];\n\t\t\t\t\t}\n\n\t\t\t\t\t// Fall back on getElementsByName\n\t\t\t\t\telems = context.getElementsByName( id );\n\t\t\t\t\ti = 0;\n\t\t\t\t\twhile ( (elem = elems[i++]) ) {\n\t\t\t\t\t\tnode = elem.getAttributeNode(\"id\");\n\t\t\t\t\t\tif ( node && node.value === id ) {\n\t\t\t\t\t\t\treturn [ elem ];\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn [];\n\t\t\t}\n\t\t};\n\t}\n\n\t// Tag\n\tExpr.find[\"TAG\"] = support.getElementsByTagName ?\n\t\tfunction( tag, context ) {\n\t\t\tif ( typeof context.getElementsByTagName !== \"undefined\" ) {\n\t\t\t\treturn context.getElementsByTagName( tag );\n\n\t\t\t// DocumentFragment nodes don't have gEBTN\n\t\t\t} else if ( support.qsa ) {\n\t\t\t\treturn context.querySelectorAll( tag );\n\t\t\t}\n\t\t} :\n\n\t\tfunction( tag, context ) {\n\t\t\tvar elem,\n\t\t\t\ttmp = [],\n\t\t\t\ti = 0,\n\t\t\t\t// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too\n\t\t\t\tresults = context.getElementsByTagName( tag );\n\n\t\t\t// Filter out possible comments\n\t\t\tif ( tag === \"*\" ) {\n\t\t\t\twhile ( (elem = results[i++]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 ) {\n\t\t\t\t\t\ttmp.push( elem );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn tmp;\n\t\t\t}\n\t\t\treturn results;\n\t\t};\n\n\t// Class\n\tExpr.find[\"CLASS\"] = support.getElementsByClassName && function( className, context ) {\n\t\tif ( typeof context.getElementsByClassName !== \"undefined\" && documentIsHTML ) {\n\t\t\treturn context.getElementsByClassName( className );\n\t\t}\n\t};\n\n\t/* QSA/matchesSelector\n\t---------------------------------------------------------------------- */\n\n\t// QSA and matchesSelector support\n\n\t// matchesSelector(:active) reports false when true (IE9/Opera 11.5)\n\trbuggyMatches = [];\n\n\t// qSa(:focus) reports false when true (Chrome 21)\n\t// We allow this because of a bug in IE8/9 that throws an error\n\t// whenever `document.activeElement` is accessed on an iframe\n\t// So, we allow :focus to pass through QSA all the time to avoid the IE error\n\t// See https://bugs.jquery.com/ticket/13378\n\trbuggyQSA = [];\n\n\tif ( (support.qsa = rnative.test( document.querySelectorAll )) ) {\n\t\t// Build QSA regex\n\t\t// Regex strategy adopted from Diego Perini\n\t\tassert(function( el ) {\n\t\t\t// Select is set to empty string on purpose\n\t\t\t// This is to test IE's treatment of not explicitly\n\t\t\t// setting a boolean content attribute,\n\t\t\t// since its presence should be enough\n\t\t\t// https://bugs.jquery.com/ticket/12359\n\t\t\tdocElem.appendChild( el ).innerHTML = \"<a id='\" + expando + \"'></a>\" +\n\t\t\t\t\"<select id='\" + expando + \"-\\r\\\\' msallowcapture=''>\" +\n\t\t\t\t\"<option selected=''></option></select>\";\n\n\t\t\t// Support: IE8, Opera 11-12.16\n\t\t\t// Nothing should be selected when empty strings follow ^= or $= or *=\n\t\t\t// The test attribute must be unknown in Opera but \"safe\" for WinRT\n\t\t\t// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section\n\t\t\tif ( el.querySelectorAll(\"[msallowcapture^='']\").length ) {\n\t\t\t\trbuggyQSA.push( \"[*^$]=\" + whitespace + \"*(?:''|\\\"\\\")\" );\n\t\t\t}\n\n\t\t\t// Support: IE8\n\t\t\t// Boolean attributes and \"value\" are not treated correctly\n\t\t\tif ( !el.querySelectorAll(\"[selected]\").length ) {\n\t\t\t\trbuggyQSA.push( \"\\\\[\" + whitespace + \"*(?:value|\" + booleans + \")\" );\n\t\t\t}\n\n\t\t\t// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+\n\t\t\tif ( !el.querySelectorAll( \"[id~=\" + expando + \"-]\" ).length ) {\n\t\t\t\trbuggyQSA.push(\"~=\");\n\t\t\t}\n\n\t\t\t// Webkit/Opera - :checked should return selected option elements\n\t\t\t// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked\n\t\t\t// IE8 throws error here and will not see later tests\n\t\t\tif ( !el.querySelectorAll(\":checked\").length ) {\n\t\t\t\trbuggyQSA.push(\":checked\");\n\t\t\t}\n\n\t\t\t// Support: Safari 8+, iOS 8+\n\t\t\t// https://bugs.webkit.org/show_bug.cgi?id=136851\n\t\t\t// In-page `selector#id sibling-combinator selector` fails\n\t\t\tif ( !el.querySelectorAll( \"a#\" + expando + \"+*\" ).length ) {\n\t\t\t\trbuggyQSA.push(\".#.+[+~]\");\n\t\t\t}\n\t\t});\n\n\t\tassert(function( el ) {\n\t\t\tel.innerHTML = \"<a href='' disabled='disabled'></a>\" +\n\t\t\t\t\"<select disabled='disabled'><option/></select>\";\n\n\t\t\t// Support: Windows 8 Native Apps\n\t\t\t// The type and name attributes are restricted during .innerHTML assignment\n\t\t\tvar input = document.createElement(\"input\");\n\t\t\tinput.setAttribute( \"type\", \"hidden\" );\n\t\t\tel.appendChild( input ).setAttribute( \"name\", \"D\" );\n\n\t\t\t// Support: IE8\n\t\t\t// Enforce case-sensitivity of name attribute\n\t\t\tif ( el.querySelectorAll(\"[name=d]\").length ) {\n\t\t\t\trbuggyQSA.push( \"name\" + whitespace + \"*[*^$|!~]?=\" );\n\t\t\t}\n\n\t\t\t// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)\n\t\t\t// IE8 throws error here and will not see later tests\n\t\t\tif ( el.querySelectorAll(\":enabled\").length !== 2 ) {\n\t\t\t\trbuggyQSA.push( \":enabled\", \":disabled\" );\n\t\t\t}\n\n\t\t\t// Support: IE9-11+\n\t\t\t// IE's :disabled selector does not pick up the children of disabled fieldsets\n\t\t\tdocElem.appendChild( el ).disabled = true;\n\t\t\tif ( el.querySelectorAll(\":disabled\").length !== 2 ) {\n\t\t\t\trbuggyQSA.push( \":enabled\", \":disabled\" );\n\t\t\t}\n\n\t\t\t// Opera 10-11 does not throw on post-comma invalid pseudos\n\t\t\tel.querySelectorAll(\"*,:x\");\n\t\t\trbuggyQSA.push(\",.*:\");\n\t\t});\n\t}\n\n\tif ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||\n\t\tdocElem.webkitMatchesSelector ||\n\t\tdocElem.mozMatchesSelector ||\n\t\tdocElem.oMatchesSelector ||\n\t\tdocElem.msMatchesSelector) )) ) {\n\n\t\tassert(function( el ) {\n\t\t\t// Check to see if it's possible to do matchesSelector\n\t\t\t// on a disconnected node (IE 9)\n\t\t\tsupport.disconnectedMatch = matches.call( el, \"*\" );\n\n\t\t\t// This should fail with an exception\n\t\t\t// Gecko does not error, returns false instead\n\t\t\tmatches.call( el, \"[s!='']:x\" );\n\t\t\trbuggyMatches.push( \"!=\", pseudos );\n\t\t});\n\t}\n\n\trbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join(\"|\") );\n\trbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join(\"|\") );\n\n\t/* Contains\n\t---------------------------------------------------------------------- */\n\thasCompare = rnative.test( docElem.compareDocumentPosition );\n\n\t// Element contains another\n\t// Purposefully self-exclusive\n\t// As in, an element does not contain itself\n\tcontains = hasCompare || rnative.test( docElem.contains ) ?\n\t\tfunction( a, b ) {\n\t\t\tvar adown = a.nodeType === 9 ? a.documentElement : a,\n\t\t\t\tbup = b && b.parentNode;\n\t\t\treturn a === bup || !!( bup && bup.nodeType === 1 && (\n\t\t\t\tadown.contains ?\n\t\t\t\t\tadown.contains( bup ) :\n\t\t\t\t\ta.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16\n\t\t\t));\n\t\t} :\n\t\tfunction( a, b ) {\n\t\t\tif ( b ) {\n\t\t\t\twhile ( (b = b.parentNode) ) {\n\t\t\t\t\tif ( b === a ) {\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t};\n\n\t/* Sorting\n\t---------------------------------------------------------------------- */\n\n\t// Document order sorting\n\tsortOrder = hasCompare ?\n\tfunction( a, b ) {\n\n\t\t// Flag for duplicate removal\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t\treturn 0;\n\t\t}\n\n\t\t// Sort on method existence if only one input has compareDocumentPosition\n\t\tvar compare = !a.compareDocumentPosition - !b.compareDocumentPosition;\n\t\tif ( compare ) {\n\t\t\treturn compare;\n\t\t}\n\n\t\t// Calculate position if both inputs belong to the same document\n\t\tcompare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?\n\t\t\ta.compareDocumentPosition( b ) :\n\n\t\t\t// Otherwise we know they are disconnected\n\t\t\t1;\n\n\t\t// Disconnected nodes\n\t\tif ( compare & 1 ||\n\t\t\t(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {\n\n\t\t\t// Choose the first element that is related to our preferred document\n\t\t\tif ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t\tif ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {\n\t\t\t\treturn 1;\n\t\t\t}\n\n\t\t\t// Maintain original order\n\t\t\treturn sortInput ?\n\t\t\t\t( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :\n\t\t\t\t0;\n\t\t}\n\n\t\treturn compare & 4 ? -1 : 1;\n\t} :\n\tfunction( a, b ) {\n\t\t// Exit early if the nodes are identical\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t\treturn 0;\n\t\t}\n\n\t\tvar cur,\n\t\t\ti = 0,\n\t\t\taup = a.parentNode,\n\t\t\tbup = b.parentNode,\n\t\t\tap = [ a ],\n\t\t\tbp = [ b ];\n\n\t\t// Parentless nodes are either documents or disconnected\n\t\tif ( !aup || !bup ) {\n\t\t\treturn a === document ? -1 :\n\t\t\t\tb === document ? 1 :\n\t\t\t\taup ? -1 :\n\t\t\t\tbup ? 1 :\n\t\t\t\tsortInput ?\n\t\t\t\t( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :\n\t\t\t\t0;\n\n\t\t// If the nodes are siblings, we can do a quick check\n\t\t} else if ( aup === bup ) {\n\t\t\treturn siblingCheck( a, b );\n\t\t}\n\n\t\t// Otherwise we need full lists of their ancestors for comparison\n\t\tcur = a;\n\t\twhile ( (cur = cur.parentNode) ) {\n\t\t\tap.unshift( cur );\n\t\t}\n\t\tcur = b;\n\t\twhile ( (cur = cur.parentNode) ) {\n\t\t\tbp.unshift( cur );\n\t\t}\n\n\t\t// Walk down the tree looking for a discrepancy\n\t\twhile ( ap[i] === bp[i] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i ?\n\t\t\t// Do a sibling check if the nodes have a common ancestor\n\t\t\tsiblingCheck( ap[i], bp[i] ) :\n\n\t\t\t// Otherwise nodes in our document sort first\n\t\t\tap[i] === preferredDoc ? -1 :\n\t\t\tbp[i] === preferredDoc ? 1 :\n\t\t\t0;\n\t};\n\n\treturn document;\n};\n\nSizzle.matches = function( expr, elements ) {\n\treturn Sizzle( expr, null, null, elements );\n};\n\nSizzle.matchesSelector = function( elem, expr ) {\n\t// Set document vars if needed\n\tif ( ( elem.ownerDocument || elem ) !== document ) {\n\t\tsetDocument( elem );\n\t}\n\n\tif ( support.matchesSelector && documentIsHTML &&\n\t\t!nonnativeSelectorCache[ expr + \" \" ] &&\n\t\t( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&\n\t\t( !rbuggyQSA || !rbuggyQSA.test( expr ) ) ) {\n\n\t\ttry {\n\t\t\tvar ret = matches.call( elem, expr );\n\n\t\t\t// IE 9's matchesSelector returns false on disconnected nodes\n\t\t\tif ( ret || support.disconnectedMatch ||\n\t\t\t\t\t// As well, disconnected nodes are said to be in a document\n\t\t\t\t\t// fragment in IE 9\n\t\t\t\t\telem.document && elem.document.nodeType !== 11 ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\t\t} catch (e) {\n\t\t\tnonnativeSelectorCache( expr, true );\n\t\t}\n\t}\n\n\treturn Sizzle( expr, document, null, [ elem ] ).length > 0;\n};\n\nSizzle.contains = function( context, elem ) {\n\t// Set document vars if needed\n\tif ( ( context.ownerDocument || context ) !== document ) {\n\t\tsetDocument( context );\n\t}\n\treturn contains( context, elem );\n};\n\nSizzle.attr = function( elem, name ) {\n\t// Set document vars if needed\n\tif ( ( elem.ownerDocument || elem ) !== document ) {\n\t\tsetDocument( elem );\n\t}\n\n\tvar fn = Expr.attrHandle[ name.toLowerCase() ],\n\t\t// Don't get fooled by Object.prototype properties (jQuery #13807)\n\t\tval = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?\n\t\t\tfn( elem, name, !documentIsHTML ) :\n\t\t\tundefined;\n\n\treturn val !== undefined ?\n\t\tval :\n\t\tsupport.attributes || !documentIsHTML ?\n\t\t\telem.getAttribute( name ) :\n\t\t\t(val = elem.getAttributeNode(name)) && val.specified ?\n\t\t\t\tval.value :\n\t\t\t\tnull;\n};\n\nSizzle.escape = function( sel ) {\n\treturn (sel + \"\").replace( rcssescape, fcssescape );\n};\n\nSizzle.error = function( msg ) {\n\tthrow new Error( \"Syntax error, unrecognized expression: \" + msg );\n};\n\n/**\n * Document sorting and removing duplicates\n * @param {ArrayLike} results\n */\nSizzle.uniqueSort = function( results ) {\n\tvar elem,\n\t\tduplicates = [],\n\t\tj = 0,\n\t\ti = 0;\n\n\t// Unless we *know* we can detect duplicates, assume their presence\n\thasDuplicate = !support.detectDuplicates;\n\tsortInput = !support.sortStable && results.slice( 0 );\n\tresults.sort( sortOrder );\n\n\tif ( hasDuplicate ) {\n\t\twhile ( (elem = results[i++]) ) {\n\t\t\tif ( elem === results[ i ] ) {\n\t\t\t\tj = duplicates.push( i );\n\t\t\t}\n\t\t}\n\t\twhile ( j-- ) {\n\t\t\tresults.splice( duplicates[ j ], 1 );\n\t\t}\n\t}\n\n\t// Clear input after sorting to release objects\n\t// See https://github.com/jquery/sizzle/pull/225\n\tsortInput = null;\n\n\treturn results;\n};\n\n/**\n * Utility function for retrieving the text value of an array of DOM nodes\n * @param {Array|Element} elem\n */\ngetText = Sizzle.getText = function( elem ) {\n\tvar node,\n\t\tret = \"\",\n\t\ti = 0,\n\t\tnodeType = elem.nodeType;\n\n\tif ( !nodeType ) {\n\t\t// If no nodeType, this is expected to be an array\n\t\twhile ( (node = elem[i++]) ) {\n\t\t\t// Do not traverse comment nodes\n\t\t\tret += getText( node );\n\t\t}\n\t} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {\n\t\t// Use textContent for elements\n\t\t// innerText usage removed for consistency of new lines (jQuery #11153)\n\t\tif ( typeof elem.textContent === \"string\" ) {\n\t\t\treturn elem.textContent;\n\t\t} else {\n\t\t\t// Traverse its children\n\t\t\tfor ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {\n\t\t\t\tret += getText( elem );\n\t\t\t}\n\t\t}\n\t} else if ( nodeType === 3 || nodeType === 4 ) {\n\t\treturn elem.nodeValue;\n\t}\n\t// Do not include comment or processing instruction nodes\n\n\treturn ret;\n};\n\nExpr = Sizzle.selectors = {\n\n\t// Can be adjusted by the user\n\tcacheLength: 50,\n\n\tcreatePseudo: markFunction,\n\n\tmatch: matchExpr,\n\n\tattrHandle: {},\n\n\tfind: {},\n\n\trelative: {\n\t\t\">\": { dir: \"parentNode\", first: true },\n\t\t\" \": { dir: \"parentNode\" },\n\t\t\"+\": { dir: \"previousSibling\", first: true },\n\t\t\"~\": { dir: \"previousSibling\" }\n\t},\n\n\tpreFilter: {\n\t\t\"ATTR\": function( match ) {\n\t\t\tmatch[1] = match[1].replace( runescape, funescape );\n\n\t\t\t// Move the given value to match[3] whether quoted or unquoted\n\t\t\tmatch[3] = ( match[3] || match[4] || match[5] || \"\" ).replace( runescape, funescape );\n\n\t\t\tif ( match[2] === \"~=\" ) {\n\t\t\t\tmatch[3] = \" \" + match[3] + \" \";\n\t\t\t}\n\n\t\t\treturn match.slice( 0, 4 );\n\t\t},\n\n\t\t\"CHILD\": function( match ) {\n\t\t\t/* matches from matchExpr[\"CHILD\"]\n\t\t\t\t1 type (only|nth|...)\n\t\t\t\t2 what (child|of-type)\n\t\t\t\t3 argument (even|odd|\\d*|\\d*n([+-]\\d+)?|...)\n\t\t\t\t4 xn-component of xn+y argument ([+-]?\\d*n|)\n\t\t\t\t5 sign of xn-component\n\t\t\t\t6 x of xn-component\n\t\t\t\t7 sign of y-component\n\t\t\t\t8 y of y-component\n\t\t\t*/\n\t\t\tmatch[1] = match[1].toLowerCase();\n\n\t\t\tif ( match[1].slice( 0, 3 ) === \"nth\" ) {\n\t\t\t\t// nth-* requires argument\n\t\t\t\tif ( !match[3] ) {\n\t\t\t\t\tSizzle.error( match[0] );\n\t\t\t\t}\n\n\t\t\t\t// numeric x and y parameters for Expr.filter.CHILD\n\t\t\t\t// remember that false/true cast respectively to 0/1\n\t\t\t\tmatch[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === \"even\" || match[3] === \"odd\" ) );\n\t\t\t\tmatch[5] = +( ( match[7] + match[8] ) || match[3] === \"odd\" );\n\n\t\t\t// other types prohibit arguments\n\t\t\t} else if ( match[3] ) {\n\t\t\t\tSizzle.error( match[0] );\n\t\t\t}\n\n\t\t\treturn match;\n\t\t},\n\n\t\t\"PSEUDO\": function( match ) {\n\t\t\tvar excess,\n\t\t\t\tunquoted = !match[6] && match[2];\n\n\t\t\tif ( matchExpr[\"CHILD\"].test( match[0] ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\t// Accept quoted arguments as-is\n\t\t\tif ( match[3] ) {\n\t\t\t\tmatch[2] = match[4] || match[5] || \"\";\n\n\t\t\t// Strip excess characters from unquoted arguments\n\t\t\t} else if ( unquoted && rpseudo.test( unquoted ) &&\n\t\t\t\t// Get excess from tokenize (recursively)\n\t\t\t\t(excess = tokenize( unquoted, true )) &&\n\t\t\t\t// advance to the next closing parenthesis\n\t\t\t\t(excess = unquoted.indexOf( \")\", unquoted.length - excess ) - unquoted.length) ) {\n\n\t\t\t\t// excess is a negative index\n\t\t\t\tmatch[0] = match[0].slice( 0, excess );\n\t\t\t\tmatch[2] = unquoted.slice( 0, excess );\n\t\t\t}\n\n\t\t\t// Return only captures needed by the pseudo filter method (type and argument)\n\t\t\treturn match.slice( 0, 3 );\n\t\t}\n\t},\n\n\tfilter: {\n\n\t\t\"TAG\": function( nodeNameSelector ) {\n\t\t\tvar nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();\n\t\t\treturn nodeNameSelector === \"*\" ?\n\t\t\t\tfunction() { return true; } :\n\t\t\t\tfunction( elem ) {\n\t\t\t\t\treturn elem.nodeName && elem.nodeName.toLowerCase() === nodeName;\n\t\t\t\t};\n\t\t},\n\n\t\t\"CLASS\": function( className ) {\n\t\t\tvar pattern = classCache[ className + \" \" ];\n\n\t\t\treturn pattern ||\n\t\t\t\t(pattern = new RegExp( \"(^|\" + whitespace + \")\" + className + \"(\" + whitespace + \"|$)\" )) &&\n\t\t\t\tclassCache( className, function( elem ) {\n\t\t\t\t\treturn pattern.test( typeof elem.className === \"string\" && elem.className || typeof elem.getAttribute !== \"undefined\" && elem.getAttribute(\"class\") || \"\" );\n\t\t\t\t});\n\t\t},\n\n\t\t\"ATTR\": function( name, operator, check ) {\n\t\t\treturn function( elem ) {\n\t\t\t\tvar result = Sizzle.attr( elem, name );\n\n\t\t\t\tif ( result == null ) {\n\t\t\t\t\treturn operator === \"!=\";\n\t\t\t\t}\n\t\t\t\tif ( !operator ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\tresult += \"\";\n\n\t\t\t\treturn operator === \"=\" ? result === check :\n\t\t\t\t\toperator === \"!=\" ? result !== check :\n\t\t\t\t\toperator === \"^=\" ? check && result.indexOf( check ) === 0 :\n\t\t\t\t\toperator === \"*=\" ? check && result.indexOf( check ) > -1 :\n\t\t\t\t\toperator === \"$=\" ? check && result.slice( -check.length ) === check :\n\t\t\t\t\toperator === \"~=\" ? ( \" \" + result.replace( rwhitespace, \" \" ) + \" \" ).indexOf( check ) > -1 :\n\t\t\t\t\toperator === \"|=\" ? result === check || result.slice( 0, check.length + 1 ) === check + \"-\" :\n\t\t\t\t\tfalse;\n\t\t\t};\n\t\t},\n\n\t\t\"CHILD\": function( type, what, argument, first, last ) {\n\t\t\tvar simple = type.slice( 0, 3 ) !== \"nth\",\n\t\t\t\tforward = type.slice( -4 ) !== \"last\",\n\t\t\t\tofType = what === \"of-type\";\n\n\t\t\treturn first === 1 && last === 0 ?\n\n\t\t\t\t// Shortcut for :nth-*(n)\n\t\t\t\tfunction( elem ) {\n\t\t\t\t\treturn !!elem.parentNode;\n\t\t\t\t} :\n\n\t\t\t\tfunction( elem, context, xml ) {\n\t\t\t\t\tvar cache, uniqueCache, outerCache, node, nodeIndex, start,\n\t\t\t\t\t\tdir = simple !== forward ? \"nextSibling\" : \"previousSibling\",\n\t\t\t\t\t\tparent = elem.parentNode,\n\t\t\t\t\t\tname = ofType && elem.nodeName.toLowerCase(),\n\t\t\t\t\t\tuseCache = !xml && !ofType,\n\t\t\t\t\t\tdiff = false;\n\n\t\t\t\t\tif ( parent ) {\n\n\t\t\t\t\t\t// :(first|last|only)-(child|of-type)\n\t\t\t\t\t\tif ( simple ) {\n\t\t\t\t\t\t\twhile ( dir ) {\n\t\t\t\t\t\t\t\tnode = elem;\n\t\t\t\t\t\t\t\twhile ( (node = node[ dir ]) ) {\n\t\t\t\t\t\t\t\t\tif ( ofType ?\n\t\t\t\t\t\t\t\t\t\tnode.nodeName.toLowerCase() === name :\n\t\t\t\t\t\t\t\t\t\tnode.nodeType === 1 ) {\n\n\t\t\t\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t// Reverse direction for :only-* (if we haven't yet done so)\n\t\t\t\t\t\t\t\tstart = dir = type === \"only\" && !start && \"nextSibling\";\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tstart = [ forward ? parent.firstChild : parent.lastChild ];\n\n\t\t\t\t\t\t// non-xml :nth-child(...) stores cache data on `parent`\n\t\t\t\t\t\tif ( forward && useCache ) {\n\n\t\t\t\t\t\t\t// Seek `elem` from a previously-cached index\n\n\t\t\t\t\t\t\t// ...in a gzip-friendly way\n\t\t\t\t\t\t\tnode = parent;\n\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\tcache = uniqueCache[ type ] || [];\n\t\t\t\t\t\t\tnodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];\n\t\t\t\t\t\t\tdiff = nodeIndex && cache[ 2 ];\n\t\t\t\t\t\t\tnode = nodeIndex && parent.childNodes[ nodeIndex ];\n\n\t\t\t\t\t\t\twhile ( (node = ++nodeIndex && node && node[ dir ] ||\n\n\t\t\t\t\t\t\t\t// Fallback to seeking `elem` from the start\n\t\t\t\t\t\t\t\t(diff = nodeIndex = 0) || start.pop()) ) {\n\n\t\t\t\t\t\t\t\t// When found, cache indexes on `parent` and break\n\t\t\t\t\t\t\t\tif ( node.nodeType === 1 && ++diff && node === elem ) {\n\t\t\t\t\t\t\t\t\tuniqueCache[ type ] = [ dirruns, nodeIndex, diff ];\n\t\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t// Use previously-cached element index if available\n\t\t\t\t\t\t\tif ( useCache ) {\n\t\t\t\t\t\t\t\t// ...in a gzip-friendly way\n\t\t\t\t\t\t\t\tnode = elem;\n\t\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\t\tcache = uniqueCache[ type ] || [];\n\t\t\t\t\t\t\t\tnodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];\n\t\t\t\t\t\t\t\tdiff = nodeIndex;\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t// xml :nth-child(...)\n\t\t\t\t\t\t\t// or :nth-last-child(...) or :nth(-last)?-of-type(...)\n\t\t\t\t\t\t\tif ( diff === false ) {\n\t\t\t\t\t\t\t\t// Use the same loop as above to seek `elem` from the start\n\t\t\t\t\t\t\t\twhile ( (node = ++nodeIndex && node && node[ dir ] ||\n\t\t\t\t\t\t\t\t\t(diff = nodeIndex = 0) || start.pop()) ) {\n\n\t\t\t\t\t\t\t\t\tif ( ( ofType ?\n\t\t\t\t\t\t\t\t\t\tnode.nodeName.toLowerCase() === name :\n\t\t\t\t\t\t\t\t\t\tnode.nodeType === 1 ) &&\n\t\t\t\t\t\t\t\t\t\t++diff ) {\n\n\t\t\t\t\t\t\t\t\t\t// Cache the index of each encountered element\n\t\t\t\t\t\t\t\t\t\tif ( useCache ) {\n\t\t\t\t\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\t\t\t\t\tuniqueCache[ type ] = [ dirruns, diff ];\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\tif ( node === elem ) {\n\t\t\t\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Incorporate the offset, then check against cycle size\n\t\t\t\t\t\tdiff -= last;\n\t\t\t\t\t\treturn diff === first || ( diff % first === 0 && diff / first >= 0 );\n\t\t\t\t\t}\n\t\t\t\t};\n\t\t},\n\n\t\t\"PSEUDO\": function( pseudo, argument ) {\n\t\t\t// pseudo-class names are case-insensitive\n\t\t\t// http://www.w3.org/TR/selectors/#pseudo-classes\n\t\t\t// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters\n\t\t\t// Remember that setFilters inherits from pseudos\n\t\t\tvar args,\n\t\t\t\tfn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||\n\t\t\t\t\tSizzle.error( \"unsupported pseudo: \" + pseudo );\n\n\t\t\t// The user may use createPseudo to indicate that\n\t\t\t// arguments are needed to create the filter function\n\t\t\t// just as Sizzle does\n\t\t\tif ( fn[ expando ] ) {\n\t\t\t\treturn fn( argument );\n\t\t\t}\n\n\t\t\t// But maintain support for old signatures\n\t\t\tif ( fn.length > 1 ) {\n\t\t\t\targs = [ pseudo, pseudo, \"\", argument ];\n\t\t\t\treturn Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?\n\t\t\t\t\tmarkFunction(function( seed, matches ) {\n\t\t\t\t\t\tvar idx,\n\t\t\t\t\t\t\tmatched = fn( seed, argument ),\n\t\t\t\t\t\t\ti = matched.length;\n\t\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\t\tidx = indexOf( seed, matched[i] );\n\t\t\t\t\t\t\tseed[ idx ] = !( matches[ idx ] = matched[i] );\n\t\t\t\t\t\t}\n\t\t\t\t\t}) :\n\t\t\t\t\tfunction( elem ) {\n\t\t\t\t\t\treturn fn( elem, 0, args );\n\t\t\t\t\t};\n\t\t\t}\n\n\t\t\treturn fn;\n\t\t}\n\t},\n\n\tpseudos: {\n\t\t// Potentially complex pseudos\n\t\t\"not\": markFunction(function( selector ) {\n\t\t\t// Trim the selector passed to compile\n\t\t\t// to avoid treating leading and trailing\n\t\t\t// spaces as combinators\n\t\t\tvar input = [],\n\t\t\t\tresults = [],\n\t\t\t\tmatcher = compile( selector.replace( rtrim, \"$1\" ) );\n\n\t\t\treturn matcher[ expando ] ?\n\t\t\t\tmarkFunction(function( seed, matches, context, xml ) {\n\t\t\t\t\tvar elem,\n\t\t\t\t\t\tunmatched = matcher( seed, null, xml, [] ),\n\t\t\t\t\t\ti = seed.length;\n\n\t\t\t\t\t// Match elements unmatched by `matcher`\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tif ( (elem = unmatched[i]) ) {\n\t\t\t\t\t\t\tseed[i] = !(matches[i] = elem);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}) :\n\t\t\t\tfunction( elem, context, xml ) {\n\t\t\t\t\tinput[0] = elem;\n\t\t\t\t\tmatcher( input, null, xml, results );\n\t\t\t\t\t// Don't keep the element (issue #299)\n\t\t\t\t\tinput[0] = null;\n\t\t\t\t\treturn !results.pop();\n\t\t\t\t};\n\t\t}),\n\n\t\t\"has\": markFunction(function( selector ) {\n\t\t\treturn function( elem ) {\n\t\t\t\treturn Sizzle( selector, elem ).length > 0;\n\t\t\t};\n\t\t}),\n\n\t\t\"contains\": markFunction(function( text ) {\n\t\t\ttext = text.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\treturn ( elem.textContent || getText( elem ) ).indexOf( text ) > -1;\n\t\t\t};\n\t\t}),\n\n\t\t// \"Whether an element is represented by a :lang() selector\n\t\t// is based solely on the element's language value\n\t\t// being equal to the identifier C,\n\t\t// or beginning with the identifier C immediately followed by \"-\".\n\t\t// The matching of C against the element's language value is performed case-insensitively.\n\t\t// The identifier C does not have to be a valid language name.\"\n\t\t// http://www.w3.org/TR/selectors/#lang-pseudo\n\t\t\"lang\": markFunction( function( lang ) {\n\t\t\t// lang value must be a valid identifier\n\t\t\tif ( !ridentifier.test(lang || \"\") ) {\n\t\t\t\tSizzle.error( \"unsupported lang: \" + lang );\n\t\t\t}\n\t\t\tlang = lang.replace( runescape, funescape ).toLowerCase();\n\t\t\treturn function( elem ) {\n\t\t\t\tvar elemLang;\n\t\t\t\tdo {\n\t\t\t\t\tif ( (elemLang = documentIsHTML ?\n\t\t\t\t\t\telem.lang :\n\t\t\t\t\t\telem.getAttribute(\"xml:lang\") || elem.getAttribute(\"lang\")) ) {\n\n\t\t\t\t\t\telemLang = elemLang.toLowerCase();\n\t\t\t\t\t\treturn elemLang === lang || elemLang.indexOf( lang + \"-\" ) === 0;\n\t\t\t\t\t}\n\t\t\t\t} while ( (elem = elem.parentNode) && elem.nodeType === 1 );\n\t\t\t\treturn false;\n\t\t\t};\n\t\t}),\n\n\t\t// Miscellaneous\n\t\t\"target\": function( elem ) {\n\t\t\tvar hash = window.location && window.location.hash;\n\t\t\treturn hash && hash.slice( 1 ) === elem.id;\n\t\t},\n\n\t\t\"root\": function( elem ) {\n\t\t\treturn elem === docElem;\n\t\t},\n\n\t\t\"focus\": function( elem ) {\n\t\t\treturn elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);\n\t\t},\n\n\t\t// Boolean properties\n\t\t\"enabled\": createDisabledPseudo( false ),\n\t\t\"disabled\": createDisabledPseudo( true ),\n\n\t\t\"checked\": function( elem ) {\n\t\t\t// In CSS3, :checked should return both checked and selected elements\n\t\t\t// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked\n\t\t\tvar nodeName = elem.nodeName.toLowerCase();\n\t\t\treturn (nodeName === \"input\" && !!elem.checked) || (nodeName === \"option\" && !!elem.selected);\n\t\t},\n\n\t\t\"selected\": function( elem ) {\n\t\t\t// Accessing this property makes selected-by-default\n\t\t\t// options in Safari work properly\n\t\t\tif ( elem.parentNode ) {\n\t\t\t\telem.parentNode.selectedIndex;\n\t\t\t}\n\n\t\t\treturn elem.selected === true;\n\t\t},\n\n\t\t// Contents\n\t\t\"empty\": function( elem ) {\n\t\t\t// http://www.w3.org/TR/selectors/#empty-pseudo\n\t\t\t// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),\n\t\t\t// but not by others (comment: 8; processing instruction: 7; etc.)\n\t\t\t// nodeType < 6 works because attributes (2) do not appear as children\n\t\t\tfor ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {\n\t\t\t\tif ( elem.nodeType < 6 ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn true;\n\t\t},\n\n\t\t\"parent\": function( elem ) {\n\t\t\treturn !Expr.pseudos[\"empty\"]( elem );\n\t\t},\n\n\t\t// Element/input types\n\t\t\"header\": function( elem ) {\n\t\t\treturn rheader.test( elem.nodeName );\n\t\t},\n\n\t\t\"input\": function( elem ) {\n\t\t\treturn rinputs.test( elem.nodeName );\n\t\t},\n\n\t\t\"button\": function( elem ) {\n\t\t\tvar name = elem.nodeName.toLowerCase();\n\t\t\treturn name === \"input\" && elem.type === \"button\" || name === \"button\";\n\t\t},\n\n\t\t\"text\": function( elem ) {\n\t\t\tvar attr;\n\t\t\treturn elem.nodeName.toLowerCase() === \"input\" &&\n\t\t\t\telem.type === \"text\" &&\n\n\t\t\t\t// Support: IE<8\n\t\t\t\t// New HTML5 attribute values (e.g., \"search\") appear with elem.type === \"text\"\n\t\t\t\t( (attr = elem.getAttribute(\"type\")) == null || attr.toLowerCase() === \"text\" );\n\t\t},\n\n\t\t// Position-in-collection\n\t\t\"first\": createPositionalPseudo(function() {\n\t\t\treturn [ 0 ];\n\t\t}),\n\n\t\t\"last\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\treturn [ length - 1 ];\n\t\t}),\n\n\t\t\"eq\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\treturn [ argument < 0 ? argument + length : argument ];\n\t\t}),\n\n\t\t\"even\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\tvar i = 0;\n\t\t\tfor ( ; i < length; i += 2 ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"odd\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\tvar i = 1;\n\t\t\tfor ( ; i < length; i += 2 ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"lt\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\tvar i = argument < 0 ?\n\t\t\t\targument + length :\n\t\t\t\targument > length ?\n\t\t\t\t\tlength :\n\t\t\t\t\targument;\n\t\t\tfor ( ; --i >= 0; ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"gt\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\tvar i = argument < 0 ? argument + length : argument;\n\t\t\tfor ( ; ++i < length; ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t})\n\t}\n};\n\nExpr.pseudos[\"nth\"] = Expr.pseudos[\"eq\"];\n\n// Add button/input type pseudos\nfor ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {\n\tExpr.pseudos[ i ] = createInputPseudo( i );\n}\nfor ( i in { submit: true, reset: true } ) {\n\tExpr.pseudos[ i ] = createButtonPseudo( i );\n}\n\n// Easy API for creating new setFilters\nfunction setFilters() {}\nsetFilters.prototype = Expr.filters = Expr.pseudos;\nExpr.setFilters = new setFilters();\n\ntokenize = Sizzle.tokenize = function( selector, parseOnly ) {\n\tvar matched, match, tokens, type,\n\t\tsoFar, groups, preFilters,\n\t\tcached = tokenCache[ selector + \" \" ];\n\n\tif ( cached ) {\n\t\treturn parseOnly ? 0 : cached.slice( 0 );\n\t}\n\n\tsoFar = selector;\n\tgroups = [];\n\tpreFilters = Expr.preFilter;\n\n\twhile ( soFar ) {\n\n\t\t// Comma and first run\n\t\tif ( !matched || (match = rcomma.exec( soFar )) ) {\n\t\t\tif ( match ) {\n\t\t\t\t// Don't consume trailing commas as valid\n\t\t\t\tsoFar = soFar.slice( match[0].length ) || soFar;\n\t\t\t}\n\t\t\tgroups.push( (tokens = []) );\n\t\t}\n\n\t\tmatched = false;\n\n\t\t// Combinators\n\t\tif ( (match = rcombinators.exec( soFar )) ) {\n\t\t\tmatched = match.shift();\n\t\t\ttokens.push({\n\t\t\t\tvalue: matched,\n\t\t\t\t// Cast descendant combinators to space\n\t\t\t\ttype: match[0].replace( rtrim, \" \" )\n\t\t\t});\n\t\t\tsoFar = soFar.slice( matched.length );\n\t\t}\n\n\t\t// Filters\n\t\tfor ( type in Expr.filter ) {\n\t\t\tif ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||\n\t\t\t\t(match = preFilters[ type ]( match ))) ) {\n\t\t\t\tmatched = match.shift();\n\t\t\t\ttokens.push({\n\t\t\t\t\tvalue: matched,\n\t\t\t\t\ttype: type,\n\t\t\t\t\tmatches: match\n\t\t\t\t});\n\t\t\t\tsoFar = soFar.slice( matched.length );\n\t\t\t}\n\t\t}\n\n\t\tif ( !matched ) {\n\t\t\tbreak;\n\t\t}\n\t}\n\n\t// Return the length of the invalid excess\n\t// if we're just parsing\n\t// Otherwise, throw an error or return tokens\n\treturn parseOnly ?\n\t\tsoFar.length :\n\t\tsoFar ?\n\t\t\tSizzle.error( selector ) :\n\t\t\t// Cache the tokens\n\t\t\ttokenCache( selector, groups ).slice( 0 );\n};\n\nfunction toSelector( tokens ) {\n\tvar i = 0,\n\t\tlen = tokens.length,\n\t\tselector = \"\";\n\tfor ( ; i < len; i++ ) {\n\t\tselector += tokens[i].value;\n\t}\n\treturn selector;\n}\n\nfunction addCombinator( matcher, combinator, base ) {\n\tvar dir = combinator.dir,\n\t\tskip = combinator.next,\n\t\tkey = skip || dir,\n\t\tcheckNonElements = base && key === \"parentNode\",\n\t\tdoneName = done++;\n\n\treturn combinator.first ?\n\t\t// Check against closest ancestor/preceding element\n\t\tfunction( elem, context, xml ) {\n\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\treturn matcher( elem, context, xml );\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t} :\n\n\t\t// Check against all ancestor/preceding elements\n\t\tfunction( elem, context, xml ) {\n\t\t\tvar oldCache, uniqueCache, outerCache,\n\t\t\t\tnewCache = [ dirruns, doneName ];\n\n\t\t\t// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching\n\t\t\tif ( xml ) {\n\t\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\t\tif ( matcher( elem, context, xml ) ) {\n\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\t\touterCache = elem[ expando ] || (elem[ expando ] = {});\n\n\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\tuniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});\n\n\t\t\t\t\t\tif ( skip && skip === elem.nodeName.toLowerCase() ) {\n\t\t\t\t\t\t\telem = elem[ dir ] || elem;\n\t\t\t\t\t\t} else if ( (oldCache = uniqueCache[ key ]) &&\n\t\t\t\t\t\t\toldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {\n\n\t\t\t\t\t\t\t// Assign to newCache so results back-propagate to previous elements\n\t\t\t\t\t\t\treturn (newCache[ 2 ] = oldCache[ 2 ]);\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t// Reuse newcache so results back-propagate to previous elements\n\t\t\t\t\t\t\tuniqueCache[ key ] = newCache;\n\n\t\t\t\t\t\t\t// A match means we're done; a fail means we have to keep checking\n\t\t\t\t\t\t\tif ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {\n\t\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t};\n}\n\nfunction elementMatcher( matchers ) {\n\treturn matchers.length > 1 ?\n\t\tfunction( elem, context, xml ) {\n\t\t\tvar i = matchers.length;\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( !matchers[i]( elem, context, xml ) ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn true;\n\t\t} :\n\t\tmatchers[0];\n}\n\nfunction multipleContexts( selector, contexts, results ) {\n\tvar i = 0,\n\t\tlen = contexts.length;\n\tfor ( ; i < len; i++ ) {\n\t\tSizzle( selector, contexts[i], results );\n\t}\n\treturn results;\n}\n\nfunction condense( unmatched, map, filter, context, xml ) {\n\tvar elem,\n\t\tnewUnmatched = [],\n\t\ti = 0,\n\t\tlen = unmatched.length,\n\t\tmapped = map != null;\n\n\tfor ( ; i < len; i++ ) {\n\t\tif ( (elem = unmatched[i]) ) {\n\t\t\tif ( !filter || filter( elem, context, xml ) ) {\n\t\t\t\tnewUnmatched.push( elem );\n\t\t\t\tif ( mapped ) {\n\t\t\t\t\tmap.push( i );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn newUnmatched;\n}\n\nfunction setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {\n\tif ( postFilter && !postFilter[ expando ] ) {\n\t\tpostFilter = setMatcher( postFilter );\n\t}\n\tif ( postFinder && !postFinder[ expando ] ) {\n\t\tpostFinder = setMatcher( postFinder, postSelector );\n\t}\n\treturn markFunction(function( seed, results, context, xml ) {\n\t\tvar temp, i, elem,\n\t\t\tpreMap = [],\n\t\t\tpostMap = [],\n\t\t\tpreexisting = results.length,\n\n\t\t\t// Get initial elements from seed or context\n\t\t\telems = seed || multipleContexts( selector || \"*\", context.nodeType ? [ context ] : context, [] ),\n\n\t\t\t// Prefilter to get matcher input, preserving a map for seed-results synchronization\n\t\t\tmatcherIn = preFilter && ( seed || !selector ) ?\n\t\t\t\tcondense( elems, preMap, preFilter, context, xml ) :\n\t\t\t\telems,\n\n\t\t\tmatcherOut = matcher ?\n\t\t\t\t// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,\n\t\t\t\tpostFinder || ( seed ? preFilter : preexisting || postFilter ) ?\n\n\t\t\t\t\t// ...intermediate processing is necessary\n\t\t\t\t\t[] :\n\n\t\t\t\t\t// ...otherwise use results directly\n\t\t\t\t\tresults :\n\t\t\t\tmatcherIn;\n\n\t\t// Find primary matches\n\t\tif ( matcher ) {\n\t\t\tmatcher( matcherIn, matcherOut, context, xml );\n\t\t}\n\n\t\t// Apply postFilter\n\t\tif ( postFilter ) {\n\t\t\ttemp = condense( matcherOut, postMap );\n\t\t\tpostFilter( temp, [], context, xml );\n\n\t\t\t// Un-match failing elements by moving them back to matcherIn\n\t\t\ti = temp.length;\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( (elem = temp[i]) ) {\n\t\t\t\t\tmatcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif ( seed ) {\n\t\t\tif ( postFinder || preFilter ) {\n\t\t\t\tif ( postFinder ) {\n\t\t\t\t\t// Get the final matcherOut by condensing this intermediate into postFinder contexts\n\t\t\t\t\ttemp = [];\n\t\t\t\t\ti = matcherOut.length;\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tif ( (elem = matcherOut[i]) ) {\n\t\t\t\t\t\t\t// Restore matcherIn since elem is not yet a final match\n\t\t\t\t\t\t\ttemp.push( (matcherIn[i] = elem) );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tpostFinder( null, (matcherOut = []), temp, xml );\n\t\t\t\t}\n\n\t\t\t\t// Move matched elements from seed to results to keep them synchronized\n\t\t\t\ti = matcherOut.length;\n\t\t\t\twhile ( i-- ) {\n\t\t\t\t\tif ( (elem = matcherOut[i]) &&\n\t\t\t\t\t\t(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {\n\n\t\t\t\t\t\tseed[temp] = !(results[temp] = elem);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Add elements to results, through postFinder if defined\n\t\t} else {\n\t\t\tmatcherOut = condense(\n\t\t\t\tmatcherOut === results ?\n\t\t\t\t\tmatcherOut.splice( preexisting, matcherOut.length ) :\n\t\t\t\t\tmatcherOut\n\t\t\t);\n\t\t\tif ( postFinder ) {\n\t\t\t\tpostFinder( null, results, matcherOut, xml );\n\t\t\t} else {\n\t\t\t\tpush.apply( results, matcherOut );\n\t\t\t}\n\t\t}\n\t});\n}\n\nfunction matcherFromTokens( tokens ) {\n\tvar checkContext, matcher, j,\n\t\tlen = tokens.length,\n\t\tleadingRelative = Expr.relative[ tokens[0].type ],\n\t\timplicitRelative = leadingRelative || Expr.relative[\" \"],\n\t\ti = leadingRelative ? 1 : 0,\n\n\t\t// The foundational matcher ensures that elements are reachable from top-level context(s)\n\t\tmatchContext = addCombinator( function( elem ) {\n\t\t\treturn elem === checkContext;\n\t\t}, implicitRelative, true ),\n\t\tmatchAnyContext = addCombinator( function( elem ) {\n\t\t\treturn indexOf( checkContext, elem ) > -1;\n\t\t}, implicitRelative, true ),\n\t\tmatchers = [ function( elem, context, xml ) {\n\t\t\tvar ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (\n\t\t\t\t(checkContext = context).nodeType ?\n\t\t\t\t\tmatchContext( elem, context, xml ) :\n\t\t\t\t\tmatchAnyContext( elem, context, xml ) );\n\t\t\t// Avoid hanging onto element (issue #299)\n\t\t\tcheckContext = null;\n\t\t\treturn ret;\n\t\t} ];\n\n\tfor ( ; i < len; i++ ) {\n\t\tif ( (matcher = Expr.relative[ tokens[i].type ]) ) {\n\t\t\tmatchers = [ addCombinator(elementMatcher( matchers ), matcher) ];\n\t\t} else {\n\t\t\tmatcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );\n\n\t\t\t// Return special upon seeing a positional matcher\n\t\t\tif ( matcher[ expando ] ) {\n\t\t\t\t// Find the next relative operator (if any) for proper handling\n\t\t\t\tj = ++i;\n\t\t\t\tfor ( ; j < len; j++ ) {\n\t\t\t\t\tif ( Expr.relative[ tokens[j].type ] ) {\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn setMatcher(\n\t\t\t\t\ti > 1 && elementMatcher( matchers ),\n\t\t\t\t\ti > 1 && toSelector(\n\t\t\t\t\t\t// If the preceding token was a descendant combinator, insert an implicit any-element `*`\n\t\t\t\t\t\ttokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === \" \" ? \"*\" : \"\" })\n\t\t\t\t\t).replace( rtrim, \"$1\" ),\n\t\t\t\t\tmatcher,\n\t\t\t\t\ti < j && matcherFromTokens( tokens.slice( i, j ) ),\n\t\t\t\t\tj < len && matcherFromTokens( (tokens = tokens.slice( j )) ),\n\t\t\t\t\tj < len && toSelector( tokens )\n\t\t\t\t);\n\t\t\t}\n\t\t\tmatchers.push( matcher );\n\t\t}\n\t}\n\n\treturn elementMatcher( matchers );\n}\n\nfunction matcherFromGroupMatchers( elementMatchers, setMatchers ) {\n\tvar bySet = setMatchers.length > 0,\n\t\tbyElement = elementMatchers.length > 0,\n\t\tsuperMatcher = function( seed, context, xml, results, outermost ) {\n\t\t\tvar elem, j, matcher,\n\t\t\t\tmatchedCount = 0,\n\t\t\t\ti = \"0\",\n\t\t\t\tunmatched = seed && [],\n\t\t\t\tsetMatched = [],\n\t\t\t\tcontextBackup = outermostContext,\n\t\t\t\t// We must always have either seed elements or outermost context\n\t\t\t\telems = seed || byElement && Expr.find[\"TAG\"]( \"*\", outermost ),\n\t\t\t\t// Use integer dirruns iff this is the outermost matcher\n\t\t\t\tdirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),\n\t\t\t\tlen = elems.length;\n\n\t\t\tif ( outermost ) {\n\t\t\t\toutermostContext = context === document || context || outermost;\n\t\t\t}\n\n\t\t\t// Add elements passing elementMatchers directly to results\n\t\t\t// Support: IE<9, Safari\n\t\t\t// Tolerate NodeList properties (IE: \"length\"; Safari: <number>) matching elements by id\n\t\t\tfor ( ; i !== len && (elem = elems[i]) != null; i++ ) {\n\t\t\t\tif ( byElement && elem ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\tif ( !context && elem.ownerDocument !== document ) {\n\t\t\t\t\t\tsetDocument( elem );\n\t\t\t\t\t\txml = !documentIsHTML;\n\t\t\t\t\t}\n\t\t\t\t\twhile ( (matcher = elementMatchers[j++]) ) {\n\t\t\t\t\t\tif ( matcher( elem, context || document, xml) ) {\n\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif ( outermost ) {\n\t\t\t\t\t\tdirruns = dirrunsUnique;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Track unmatched elements for set filters\n\t\t\t\tif ( bySet ) {\n\t\t\t\t\t// They will have gone through all possible matchers\n\t\t\t\t\tif ( (elem = !matcher && elem) ) {\n\t\t\t\t\t\tmatchedCount--;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Lengthen the array for every element, matched or not\n\t\t\t\t\tif ( seed ) {\n\t\t\t\t\t\tunmatched.push( elem );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// `i` is now the count of elements visited above, and adding it to `matchedCount`\n\t\t\t// makes the latter nonnegative.\n\t\t\tmatchedCount += i;\n\n\t\t\t// Apply set filters to unmatched elements\n\t\t\t// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`\n\t\t\t// equals `i`), unless we didn't visit _any_ elements in the above loop because we have\n\t\t\t// no element matchers and no seed.\n\t\t\t// Incrementing an initially-string \"0\" `i` allows `i` to remain a string only in that\n\t\t\t// case, which will result in a \"00\" `matchedCount` that differs from `i` but is also\n\t\t\t// numerically zero.\n\t\t\tif ( bySet && i !== matchedCount ) {\n\t\t\t\tj = 0;\n\t\t\t\twhile ( (matcher = setMatchers[j++]) ) {\n\t\t\t\t\tmatcher( unmatched, setMatched, context, xml );\n\t\t\t\t}\n\n\t\t\t\tif ( seed ) {\n\t\t\t\t\t// Reintegrate element matches to eliminate the need for sorting\n\t\t\t\t\tif ( matchedCount > 0 ) {\n\t\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\t\tif ( !(unmatched[i] || setMatched[i]) ) {\n\t\t\t\t\t\t\t\tsetMatched[i] = pop.call( results );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Discard index placeholder values to get only actual matches\n\t\t\t\t\tsetMatched = condense( setMatched );\n\t\t\t\t}\n\n\t\t\t\t// Add matches to results\n\t\t\t\tpush.apply( results, setMatched );\n\n\t\t\t\t// Seedless set matches succeeding multiple successful matchers stipulate sorting\n\t\t\t\tif ( outermost && !seed && setMatched.length > 0 &&\n\t\t\t\t\t( matchedCount + setMatchers.length ) > 1 ) {\n\n\t\t\t\t\tSizzle.uniqueSort( results );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Override manipulation of globals by nested matchers\n\t\t\tif ( outermost ) {\n\t\t\t\tdirruns = dirrunsUnique;\n\t\t\t\toutermostContext = contextBackup;\n\t\t\t}\n\n\t\t\treturn unmatched;\n\t\t};\n\n\treturn bySet ?\n\t\tmarkFunction( superMatcher ) :\n\t\tsuperMatcher;\n}\n\ncompile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {\n\tvar i,\n\t\tsetMatchers = [],\n\t\telementMatchers = [],\n\t\tcached = compilerCache[ selector + \" \" ];\n\n\tif ( !cached ) {\n\t\t// Generate a function of recursive functions that can be used to check each element\n\t\tif ( !match ) {\n\t\t\tmatch = tokenize( selector );\n\t\t}\n\t\ti = match.length;\n\t\twhile ( i-- ) {\n\t\t\tcached = matcherFromTokens( match[i] );\n\t\t\tif ( cached[ expando ] ) {\n\t\t\t\tsetMatchers.push( cached );\n\t\t\t} else {\n\t\t\t\telementMatchers.push( cached );\n\t\t\t}\n\t\t}\n\n\t\t// Cache the compiled function\n\t\tcached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );\n\n\t\t// Save selector and tokenization\n\t\tcached.selector = selector;\n\t}\n\treturn cached;\n};\n\n/**\n * A low-level selection function that works with Sizzle's compiled\n * selector functions\n * @param {String|Function} selector A selector or a pre-compiled\n * selector function built with Sizzle.compile\n * @param {Element} context\n * @param {Array} [results]\n * @param {Array} [seed] A set of elements to match against\n */\nselect = Sizzle.select = function( selector, context, results, seed ) {\n\tvar i, tokens, token, type, find,\n\t\tcompiled = typeof selector === \"function\" && selector,\n\t\tmatch = !seed && tokenize( (selector = compiled.selector || selector) );\n\n\tresults = results || [];\n\n\t// Try to minimize operations if there is only one selector in the list and no seed\n\t// (the latter of which guarantees us context)\n\tif ( match.length === 1 ) {\n\n\t\t// Reduce context if the leading compound selector is an ID\n\t\ttokens = match[0] = match[0].slice( 0 );\n\t\tif ( tokens.length > 2 && (token = tokens[0]).type === \"ID\" &&\n\t\t\t\tcontext.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {\n\n\t\t\tcontext = ( Expr.find[\"ID\"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];\n\t\t\tif ( !context ) {\n\t\t\t\treturn results;\n\n\t\t\t// Precompiled matchers will still verify ancestry, so step up a level\n\t\t\t} else if ( compiled ) {\n\t\t\t\tcontext = context.parentNode;\n\t\t\t}\n\n\t\t\tselector = selector.slice( tokens.shift().value.length );\n\t\t}\n\n\t\t// Fetch a seed set for right-to-left matching\n\t\ti = matchExpr[\"needsContext\"].test( selector ) ? 0 : tokens.length;\n\t\twhile ( i-- ) {\n\t\t\ttoken = tokens[i];\n\n\t\t\t// Abort if we hit a combinator\n\t\t\tif ( Expr.relative[ (type = token.type) ] ) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tif ( (find = Expr.find[ type ]) ) {\n\t\t\t\t// Search, expanding context for leading sibling combinators\n\t\t\t\tif ( (seed = find(\n\t\t\t\t\ttoken.matches[0].replace( runescape, funescape ),\n\t\t\t\t\trsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context\n\t\t\t\t)) ) {\n\n\t\t\t\t\t// If seed is empty or no tokens remain, we can return early\n\t\t\t\t\ttokens.splice( i, 1 );\n\t\t\t\t\tselector = seed.length && toSelector( tokens );\n\t\t\t\t\tif ( !selector ) {\n\t\t\t\t\t\tpush.apply( results, seed );\n\t\t\t\t\t\treturn results;\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Compile and execute a filtering function if one is not provided\n\t// Provide `match` to avoid retokenization if we modified the selector above\n\t( compiled || compile( selector, match ) )(\n\t\tseed,\n\t\tcontext,\n\t\t!documentIsHTML,\n\t\tresults,\n\t\t!context || rsibling.test( selector ) && testContext( context.parentNode ) || context\n\t);\n\treturn results;\n};\n\n// One-time assignments\n\n// Sort stability\nsupport.sortStable = expando.split(\"\").sort( sortOrder ).join(\"\") === expando;\n\n// Support: Chrome 14-35+\n// Always assume duplicates if they aren't passed to the comparison function\nsupport.detectDuplicates = !!hasDuplicate;\n\n// Initialize against the default document\nsetDocument();\n\n// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)\n// Detached nodes confoundingly follow *each other*\nsupport.sortDetached = assert(function( el ) {\n\t// Should return 1, but returns 4 (following)\n\treturn el.compareDocumentPosition( document.createElement(\"fieldset\") ) & 1;\n});\n\n// Support: IE<8\n// Prevent attribute/property \"interpolation\"\n// https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx\nif ( !assert(function( el ) {\n\tel.innerHTML = \"<a href='#'></a>\";\n\treturn el.firstChild.getAttribute(\"href\") === \"#\" ;\n}) ) {\n\taddHandle( \"type|href|height|width\", function( elem, name, isXML ) {\n\t\tif ( !isXML ) {\n\t\t\treturn elem.getAttribute( name, name.toLowerCase() === \"type\" ? 1 : 2 );\n\t\t}\n\t});\n}\n\n// Support: IE<9\n// Use defaultValue in place of getAttribute(\"value\")\nif ( !support.attributes || !assert(function( el ) {\n\tel.innerHTML = \"<input/>\";\n\tel.firstChild.setAttribute( \"value\", \"\" );\n\treturn el.firstChild.getAttribute( \"value\" ) === \"\";\n}) ) {\n\taddHandle( \"value\", function( elem, name, isXML ) {\n\t\tif ( !isXML && elem.nodeName.toLowerCase() === \"input\" ) {\n\t\t\treturn elem.defaultValue;\n\t\t}\n\t});\n}\n\n// Support: IE<9\n// Use getAttributeNode to fetch booleans when getAttribute lies\nif ( !assert(function( el ) {\n\treturn el.getAttribute(\"disabled\") == null;\n}) ) {\n\taddHandle( booleans, function( elem, name, isXML ) {\n\t\tvar val;\n\t\tif ( !isXML ) {\n\t\t\treturn elem[ name ] === true ? name.toLowerCase() :\n\t\t\t\t\t(val = elem.getAttributeNode( name )) && val.specified ?\n\t\t\t\t\tval.value :\n\t\t\t\tnull;\n\t\t}\n\t});\n}\n\nreturn Sizzle;\n\n})( window );\n\n\n\njQuery.find = Sizzle;\njQuery.expr = Sizzle.selectors;\n\n// Deprecated\njQuery.expr[ \":\" ] = jQuery.expr.pseudos;\njQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;\njQuery.text = Sizzle.getText;\njQuery.isXMLDoc = Sizzle.isXML;\njQuery.contains = Sizzle.contains;\njQuery.escapeSelector = Sizzle.escape;\n\n\n\n\nvar dir = function( elem, dir, until ) {\n\tvar matched = [],\n\t\ttruncate = until !== undefined;\n\n\twhile ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {\n\t\tif ( elem.nodeType === 1 ) {\n\t\t\tif ( truncate && jQuery( elem ).is( until ) ) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tmatched.push( elem );\n\t\t}\n\t}\n\treturn matched;\n};\n\n\nvar siblings = function( n, elem ) {\n\tvar matched = [];\n\n\tfor ( ; n; n = n.nextSibling ) {\n\t\tif ( n.nodeType === 1 && n !== elem ) {\n\t\t\tmatched.push( n );\n\t\t}\n\t}\n\n\treturn matched;\n};\n\n\nvar rneedsContext = jQuery.expr.match.needsContext;\n\n\n\nfunction nodeName( elem, name ) {\n\n return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();\n\n};\nvar rsingleTag = ( /^<([a-z][^\\/\\0>:\\x20\\t\\r\\n\\f]*)[\\x20\\t\\r\\n\\f]*\\/?>(?:<\\/\\1>|)$/i );\n\n\n\n// Implement the identical functionality for filter and not\nfunction winnow( elements, qualifier, not ) {\n\tif ( isFunction( qualifier ) ) {\n\t\treturn jQuery.grep( elements, function( elem, i ) {\n\t\t\treturn !!qualifier.call( elem, i, elem ) !== not;\n\t\t} );\n\t}\n\n\t// Single element\n\tif ( qualifier.nodeType ) {\n\t\treturn jQuery.grep( elements, function( elem ) {\n\t\t\treturn ( elem === qualifier ) !== not;\n\t\t} );\n\t}\n\n\t// Arraylike of elements (jQuery, arguments, Array)\n\tif ( typeof qualifier !== \"string\" ) {\n\t\treturn jQuery.grep( elements, function( elem ) {\n\t\t\treturn ( indexOf.call( qualifier, elem ) > -1 ) !== not;\n\t\t} );\n\t}\n\n\t// Filtered directly for both simple and complex selectors\n\treturn jQuery.filter( qualifier, elements, not );\n}\n\njQuery.filter = function( expr, elems, not ) {\n\tvar elem = elems[ 0 ];\n\n\tif ( not ) {\n\t\texpr = \":not(\" + expr + \")\";\n\t}\n\n\tif ( elems.length === 1 && elem.nodeType === 1 ) {\n\t\treturn jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [];\n\t}\n\n\treturn jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {\n\t\treturn elem.nodeType === 1;\n\t} ) );\n};\n\njQuery.fn.extend( {\n\tfind: function( selector ) {\n\t\tvar i, ret,\n\t\t\tlen = this.length,\n\t\t\tself = this;\n\n\t\tif ( typeof selector !== \"string\" ) {\n\t\t\treturn this.pushStack( jQuery( selector ).filter( function() {\n\t\t\t\tfor ( i = 0; i < len; i++ ) {\n\t\t\t\t\tif ( jQuery.contains( self[ i ], this ) ) {\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} ) );\n\t\t}\n\n\t\tret = this.pushStack( [] );\n\n\t\tfor ( i = 0; i < len; i++ ) {\n\t\t\tjQuery.find( selector, self[ i ], ret );\n\t\t}\n\n\t\treturn len > 1 ? jQuery.uniqueSort( ret ) : ret;\n\t},\n\tfilter: function( selector ) {\n\t\treturn this.pushStack( winnow( this, selector || [], false ) );\n\t},\n\tnot: function( selector ) {\n\t\treturn this.pushStack( winnow( this, selector || [], true ) );\n\t},\n\tis: function( selector ) {\n\t\treturn !!winnow(\n\t\t\tthis,\n\n\t\t\t// If this is a positional/relative selector, check membership in the returned set\n\t\t\t// so $(\"p:first\").is(\"p:last\") won't return true for a doc with two \"p\".\n\t\t\ttypeof selector === \"string\" && rneedsContext.test( selector ) ?\n\t\t\t\tjQuery( selector ) :\n\t\t\t\tselector || [],\n\t\t\tfalse\n\t\t).length;\n\t}\n} );\n\n\n// Initialize a jQuery object\n\n\n// A central reference to the root jQuery(document)\nvar rootjQuery,\n\n\t// A simple way to check for HTML strings\n\t// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)\n\t// Strict HTML recognition (#11290: must start with <)\n\t// Shortcut simple #id case for speed\n\trquickExpr = /^(?:\\s*(<[\\w\\W]+>)[^>]*|#([\\w-]+))$/,\n\n\tinit = jQuery.fn.init = function( selector, context, root ) {\n\t\tvar match, elem;\n\n\t\t// HANDLE: $(\"\"), $(null), $(undefined), $(false)\n\t\tif ( !selector ) {\n\t\t\treturn this;\n\t\t}\n\n\t\t// Method init() accepts an alternate rootjQuery\n\t\t// so migrate can support jQuery.sub (gh-2101)\n\t\troot = root || rootjQuery;\n\n\t\t// Handle HTML strings\n\t\tif ( typeof selector === \"string\" ) {\n\t\t\tif ( selector[ 0 ] === \"<\" &&\n\t\t\t\tselector[ selector.length - 1 ] === \">\" &&\n\t\t\t\tselector.length >= 3 ) {\n\n\t\t\t\t// Assume that strings that start and end with <> are HTML and skip the regex check\n\t\t\t\tmatch = [ null, selector, null ];\n\n\t\t\t} else {\n\t\t\t\tmatch = rquickExpr.exec( selector );\n\t\t\t}\n\n\t\t\t// Match html or make sure no context is specified for #id\n\t\t\tif ( match && ( match[ 1 ] || !context ) ) {\n\n\t\t\t\t// HANDLE: $(html) -> $(array)\n\t\t\t\tif ( match[ 1 ] ) {\n\t\t\t\t\tcontext = context instanceof jQuery ? context[ 0 ] : context;\n\n\t\t\t\t\t// Option to run scripts is true for back-compat\n\t\t\t\t\t// Intentionally let the error be thrown if parseHTML is not present\n\t\t\t\t\tjQuery.merge( this, jQuery.parseHTML(\n\t\t\t\t\t\tmatch[ 1 ],\n\t\t\t\t\t\tcontext && context.nodeType ? context.ownerDocument || context : document,\n\t\t\t\t\t\ttrue\n\t\t\t\t\t) );\n\n\t\t\t\t\t// HANDLE: $(html, props)\n\t\t\t\t\tif ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {\n\t\t\t\t\t\tfor ( match in context ) {\n\n\t\t\t\t\t\t\t// Properties of context are called as methods if possible\n\t\t\t\t\t\t\tif ( isFunction( this[ match ] ) ) {\n\t\t\t\t\t\t\t\tthis[ match ]( context[ match ] );\n\n\t\t\t\t\t\t\t// ...and otherwise set as attributes\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tthis.attr( match, context[ match ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\treturn this;\n\n\t\t\t\t// HANDLE: $(#id)\n\t\t\t\t} else {\n\t\t\t\t\telem = document.getElementById( match[ 2 ] );\n\n\t\t\t\t\tif ( elem ) {\n\n\t\t\t\t\t\t// Inject the element directly into the jQuery object\n\t\t\t\t\t\tthis[ 0 ] = elem;\n\t\t\t\t\t\tthis.length = 1;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\n\t\t\t// HANDLE: $(expr, $(...))\n\t\t\t} else if ( !context || context.jquery ) {\n\t\t\t\treturn ( context || root ).find( selector );\n\n\t\t\t// HANDLE: $(expr, context)\n\t\t\t// (which is just equivalent to: $(context).find(expr)\n\t\t\t} else {\n\t\t\t\treturn this.constructor( context ).find( selector );\n\t\t\t}\n\n\t\t// HANDLE: $(DOMElement)\n\t\t} else if ( selector.nodeType ) {\n\t\t\tthis[ 0 ] = selector;\n\t\t\tthis.length = 1;\n\t\t\treturn this;\n\n\t\t// HANDLE: $(function)\n\t\t// Shortcut for document ready\n\t\t} else if ( isFunction( selector ) ) {\n\t\t\treturn root.ready !== undefined ?\n\t\t\t\troot.ready( selector ) :\n\n\t\t\t\t// Execute immediately if ready is not present\n\t\t\t\tselector( jQuery );\n\t\t}\n\n\t\treturn jQuery.makeArray( selector, this );\n\t};\n\n// Give the init function the jQuery prototype for later instantiation\ninit.prototype = jQuery.fn;\n\n// Initialize central reference\nrootjQuery = jQuery( document );\n\n\nvar rparentsprev = /^(?:parents|prev(?:Until|All))/,\n\n\t// Methods guaranteed to produce a unique set when starting from a unique set\n\tguaranteedUnique = {\n\t\tchildren: true,\n\t\tcontents: true,\n\t\tnext: true,\n\t\tprev: true\n\t};\n\njQuery.fn.extend( {\n\thas: function( target ) {\n\t\tvar targets = jQuery( target, this ),\n\t\t\tl = targets.length;\n\n\t\treturn this.filter( function() {\n\t\t\tvar i = 0;\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tif ( jQuery.contains( this, targets[ i ] ) ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t},\n\n\tclosest: function( selectors, context ) {\n\t\tvar cur,\n\t\t\ti = 0,\n\t\t\tl = this.length,\n\t\t\tmatched = [],\n\t\t\ttargets = typeof selectors !== \"string\" && jQuery( selectors );\n\n\t\t// Positional selectors never match, since there's no _selection_ context\n\t\tif ( !rneedsContext.test( selectors ) ) {\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tfor ( cur = this[ i ]; cur && cur !== context; cur = cur.parentNode ) {\n\n\t\t\t\t\t// Always skip document fragments\n\t\t\t\t\tif ( cur.nodeType < 11 && ( targets ?\n\t\t\t\t\t\ttargets.index( cur ) > -1 :\n\n\t\t\t\t\t\t// Don't pass non-elements to Sizzle\n\t\t\t\t\t\tcur.nodeType === 1 &&\n\t\t\t\t\t\t\tjQuery.find.matchesSelector( cur, selectors ) ) ) {\n\n\t\t\t\t\t\tmatched.push( cur );\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );\n\t},\n\n\t// Determine the position of an element within the set\n\tindex: function( elem ) {\n\n\t\t// No argument, return index in parent\n\t\tif ( !elem ) {\n\t\t\treturn ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;\n\t\t}\n\n\t\t// Index in selector\n\t\tif ( typeof elem === \"string\" ) {\n\t\t\treturn indexOf.call( jQuery( elem ), this[ 0 ] );\n\t\t}\n\n\t\t// Locate the position of the desired element\n\t\treturn indexOf.call( this,\n\n\t\t\t// If it receives a jQuery object, the first element is used\n\t\t\telem.jquery ? elem[ 0 ] : elem\n\t\t);\n\t},\n\n\tadd: function( selector, context ) {\n\t\treturn this.pushStack(\n\t\t\tjQuery.uniqueSort(\n\t\t\t\tjQuery.merge( this.get(), jQuery( selector, context ) )\n\t\t\t)\n\t\t);\n\t},\n\n\taddBack: function( selector ) {\n\t\treturn this.add( selector == null ?\n\t\t\tthis.prevObject : this.prevObject.filter( selector )\n\t\t);\n\t}\n} );\n\nfunction sibling( cur, dir ) {\n\twhile ( ( cur = cur[ dir ] ) && cur.nodeType !== 1 ) {}\n\treturn cur;\n}\n\njQuery.each( {\n\tparent: function( elem ) {\n\t\tvar parent = elem.parentNode;\n\t\treturn parent && parent.nodeType !== 11 ? parent : null;\n\t},\n\tparents: function( elem ) {\n\t\treturn dir( elem, \"parentNode\" );\n\t},\n\tparentsUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"parentNode\", until );\n\t},\n\tnext: function( elem ) {\n\t\treturn sibling( elem, \"nextSibling\" );\n\t},\n\tprev: function( elem ) {\n\t\treturn sibling( elem, \"previousSibling\" );\n\t},\n\tnextAll: function( elem ) {\n\t\treturn dir( elem, \"nextSibling\" );\n\t},\n\tprevAll: function( elem ) {\n\t\treturn dir( elem, \"previousSibling\" );\n\t},\n\tnextUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"nextSibling\", until );\n\t},\n\tprevUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"previousSibling\", until );\n\t},\n\tsiblings: function( elem ) {\n\t\treturn siblings( ( elem.parentNode || {} ).firstChild, elem );\n\t},\n\tchildren: function( elem ) {\n\t\treturn siblings( elem.firstChild );\n\t},\n\tcontents: function( elem ) {\n\t\tif ( typeof elem.contentDocument !== \"undefined\" ) {\n\t\t\treturn elem.contentDocument;\n\t\t}\n\n\t\t// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only\n\t\t// Treat the template element as a regular one in browsers that\n\t\t// don't support it.\n\t\tif ( nodeName( elem, \"template\" ) ) {\n\t\t\telem = elem.content || elem;\n\t\t}\n\n\t\treturn jQuery.merge( [], elem.childNodes );\n\t}\n}, function( name, fn ) {\n\tjQuery.fn[ name ] = function( until, selector ) {\n\t\tvar matched = jQuery.map( this, fn, until );\n\n\t\tif ( name.slice( -5 ) !== \"Until\" ) {\n\t\t\tselector = until;\n\t\t}\n\n\t\tif ( selector && typeof selector === \"string\" ) {\n\t\t\tmatched = jQuery.filter( selector, matched );\n\t\t}\n\n\t\tif ( this.length > 1 ) {\n\n\t\t\t// Remove duplicates\n\t\t\tif ( !guaranteedUnique[ name ] ) {\n\t\t\t\tjQuery.uniqueSort( matched );\n\t\t\t}\n\n\t\t\t// Reverse order for parents* and prev-derivatives\n\t\t\tif ( rparentsprev.test( name ) ) {\n\t\t\t\tmatched.reverse();\n\t\t\t}\n\t\t}\n\n\t\treturn this.pushStack( matched );\n\t};\n} );\nvar rnothtmlwhite = ( /[^\\x20\\t\\r\\n\\f]+/g );\n\n\n\n// Convert String-formatted options into Object-formatted ones\nfunction createOptions( options ) {\n\tvar object = {};\n\tjQuery.each( options.match( rnothtmlwhite ) || [], function( _, flag ) {\n\t\tobject[ flag ] = true;\n\t} );\n\treturn object;\n}\n\n/*\n * Create a callback list using the following parameters:\n *\n *\toptions: an optional list of space-separated options that will change how\n *\t\t\tthe callback list behaves or a more traditional option object\n *\n * By default a callback list will act like an event callback list and can be\n * \"fired\" multiple times.\n *\n * Possible options:\n *\n *\tonce:\t\t\twill ensure the callback list can only be fired once (like a Deferred)\n *\n *\tmemory:\t\t\twill keep track of previous values and will call any callback added\n *\t\t\t\t\tafter the list has been fired right away with the latest \"memorized\"\n *\t\t\t\t\tvalues (like a Deferred)\n *\n *\tunique:\t\t\twill ensure a callback can only be added once (no duplicate in the list)\n *\n *\tstopOnFalse:\tinterrupt callings when a callback returns false\n *\n */\njQuery.Callbacks = function( options ) {\n\n\t// Convert options from String-formatted to Object-formatted if needed\n\t// (we check in cache first)\n\toptions = typeof options === \"string\" ?\n\t\tcreateOptions( options ) :\n\t\tjQuery.extend( {}, options );\n\n\tvar // Flag to know if list is currently firing\n\t\tfiring,\n\n\t\t// Last fire value for non-forgettable lists\n\t\tmemory,\n\n\t\t// Flag to know if list was already fired\n\t\tfired,\n\n\t\t// Flag to prevent firing\n\t\tlocked,\n\n\t\t// Actual callback list\n\t\tlist = [],\n\n\t\t// Queue of execution data for repeatable lists\n\t\tqueue = [],\n\n\t\t// Index of currently firing callback (modified by add/remove as needed)\n\t\tfiringIndex = -1,\n\n\t\t// Fire callbacks\n\t\tfire = function() {\n\n\t\t\t// Enforce single-firing\n\t\t\tlocked = locked || options.once;\n\n\t\t\t// Execute callbacks for all pending executions,\n\t\t\t// respecting firingIndex overrides and runtime changes\n\t\t\tfired = firing = true;\n\t\t\tfor ( ; queue.length; firingIndex = -1 ) {\n\t\t\t\tmemory = queue.shift();\n\t\t\t\twhile ( ++firingIndex < list.length ) {\n\n\t\t\t\t\t// Run callback and check for early termination\n\t\t\t\t\tif ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&\n\t\t\t\t\t\toptions.stopOnFalse ) {\n\n\t\t\t\t\t\t// Jump to end and forget the data so .add doesn't re-fire\n\t\t\t\t\t\tfiringIndex = list.length;\n\t\t\t\t\t\tmemory = false;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Forget the data if we're done with it\n\t\t\tif ( !options.memory ) {\n\t\t\t\tmemory = false;\n\t\t\t}\n\n\t\t\tfiring = false;\n\n\t\t\t// Clean up if we're done firing for good\n\t\t\tif ( locked ) {\n\n\t\t\t\t// Keep an empty list if we have data for future add calls\n\t\t\t\tif ( memory ) {\n\t\t\t\t\tlist = [];\n\n\t\t\t\t// Otherwise, this object is spent\n\t\t\t\t} else {\n\t\t\t\t\tlist = \"\";\n\t\t\t\t}\n\t\t\t}\n\t\t},\n\n\t\t// Actual Callbacks object\n\t\tself = {\n\n\t\t\t// Add a callback or a collection of callbacks to the list\n\t\t\tadd: function() {\n\t\t\t\tif ( list ) {\n\n\t\t\t\t\t// If we have memory from a past run, we should fire after adding\n\t\t\t\t\tif ( memory && !firing ) {\n\t\t\t\t\t\tfiringIndex = list.length - 1;\n\t\t\t\t\t\tqueue.push( memory );\n\t\t\t\t\t}\n\n\t\t\t\t\t( function add( args ) {\n\t\t\t\t\t\tjQuery.each( args, function( _, arg ) {\n\t\t\t\t\t\t\tif ( isFunction( arg ) ) {\n\t\t\t\t\t\t\t\tif ( !options.unique || !self.has( arg ) ) {\n\t\t\t\t\t\t\t\t\tlist.push( arg );\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} else if ( arg && arg.length && toType( arg ) !== \"string\" ) {\n\n\t\t\t\t\t\t\t\t// Inspect recursively\n\t\t\t\t\t\t\t\tadd( arg );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} );\n\t\t\t\t\t} )( arguments );\n\n\t\t\t\t\tif ( memory && !firing ) {\n\t\t\t\t\t\tfire();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Remove a callback from the list\n\t\t\tremove: function() {\n\t\t\t\tjQuery.each( arguments, function( _, arg ) {\n\t\t\t\t\tvar index;\n\t\t\t\t\twhile ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {\n\t\t\t\t\t\tlist.splice( index, 1 );\n\n\t\t\t\t\t\t// Handle firing indexes\n\t\t\t\t\t\tif ( index <= firingIndex ) {\n\t\t\t\t\t\t\tfiringIndex--;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Check if a given callback is in the list.\n\t\t\t// If no argument is given, return whether or not list has callbacks attached.\n\t\t\thas: function( fn ) {\n\t\t\t\treturn fn ?\n\t\t\t\t\tjQuery.inArray( fn, list ) > -1 :\n\t\t\t\t\tlist.length > 0;\n\t\t\t},\n\n\t\t\t// Remove all callbacks from the list\n\t\t\tempty: function() {\n\t\t\t\tif ( list ) {\n\t\t\t\t\tlist = [];\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Disable .fire and .add\n\t\t\t// Abort any current/pending executions\n\t\t\t// Clear all callbacks and values\n\t\t\tdisable: function() {\n\t\t\t\tlocked = queue = [];\n\t\t\t\tlist = memory = \"\";\n\t\t\t\treturn this;\n\t\t\t},\n\t\t\tdisabled: function() {\n\t\t\t\treturn !list;\n\t\t\t},\n\n\t\t\t// Disable .fire\n\t\t\t// Also disable .add unless we have memory (since it would have no effect)\n\t\t\t// Abort any pending executions\n\t\t\tlock: function() {\n\t\t\t\tlocked = queue = [];\n\t\t\t\tif ( !memory && !firing ) {\n\t\t\t\t\tlist = memory = \"\";\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\t\t\tlocked: function() {\n\t\t\t\treturn !!locked;\n\t\t\t},\n\n\t\t\t// Call all callbacks with the given context and arguments\n\t\t\tfireWith: function( context, args ) {\n\t\t\t\tif ( !locked ) {\n\t\t\t\t\targs = args || [];\n\t\t\t\t\targs = [ context, args.slice ? args.slice() : args ];\n\t\t\t\t\tqueue.push( args );\n\t\t\t\t\tif ( !firing ) {\n\t\t\t\t\t\tfire();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Call all the callbacks with the given arguments\n\t\t\tfire: function() {\n\t\t\t\tself.fireWith( this, arguments );\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// To know if the callbacks have already been called at least once\n\t\t\tfired: function() {\n\t\t\t\treturn !!fired;\n\t\t\t}\n\t\t};\n\n\treturn self;\n};\n\n\nfunction Identity( v ) {\n\treturn v;\n}\nfunction Thrower( ex ) {\n\tthrow ex;\n}\n\nfunction adoptValue( value, resolve, reject, noValue ) {\n\tvar method;\n\n\ttry {\n\n\t\t// Check for promise aspect first to privilege synchronous behavior\n\t\tif ( value && isFunction( ( method = value.promise ) ) ) {\n\t\t\tmethod.call( value ).done( resolve ).fail( reject );\n\n\t\t// Other thenables\n\t\t} else if ( value && isFunction( ( method = value.then ) ) ) {\n\t\t\tmethod.call( value, resolve, reject );\n\n\t\t// Other non-thenables\n\t\t} else {\n\n\t\t\t// Control `resolve` arguments by letting Array#slice cast boolean `noValue` to integer:\n\t\t\t// * false: [ value ].slice( 0 ) => resolve( value )\n\t\t\t// * true: [ value ].slice( 1 ) => resolve()\n\t\t\tresolve.apply( undefined, [ value ].slice( noValue ) );\n\t\t}\n\n\t// For Promises/A+, convert exceptions into rejections\n\t// Since jQuery.when doesn't unwrap thenables, we can skip the extra checks appearing in\n\t// Deferred#then to conditionally suppress rejection.\n\t} catch ( value ) {\n\n\t\t// Support: Android 4.0 only\n\t\t// Strict mode functions invoked without .call/.apply get global-object context\n\t\treject.apply( undefined, [ value ] );\n\t}\n}\n\njQuery.extend( {\n\n\tDeferred: function( func ) {\n\t\tvar tuples = [\n\n\t\t\t\t// action, add listener, callbacks,\n\t\t\t\t// ... .then handlers, argument index, [final state]\n\t\t\t\t[ \"notify\", \"progress\", jQuery.Callbacks( \"memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"memory\" ), 2 ],\n\t\t\t\t[ \"resolve\", \"done\", jQuery.Callbacks( \"once memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"once memory\" ), 0, \"resolved\" ],\n\t\t\t\t[ \"reject\", \"fail\", jQuery.Callbacks( \"once memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"once memory\" ), 1, \"rejected\" ]\n\t\t\t],\n\t\t\tstate = \"pending\",\n\t\t\tpromise = {\n\t\t\t\tstate: function() {\n\t\t\t\t\treturn state;\n\t\t\t\t},\n\t\t\t\talways: function() {\n\t\t\t\t\tdeferred.done( arguments ).fail( arguments );\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\t\t\t\t\"catch\": function( fn ) {\n\t\t\t\t\treturn promise.then( null, fn );\n\t\t\t\t},\n\n\t\t\t\t// Keep pipe for back-compat\n\t\t\t\tpipe: function( /* fnDone, fnFail, fnProgress */ ) {\n\t\t\t\t\tvar fns = arguments;\n\n\t\t\t\t\treturn jQuery.Deferred( function( newDefer ) {\n\t\t\t\t\t\tjQuery.each( tuples, function( i, tuple ) {\n\n\t\t\t\t\t\t\t// Map tuples (progress, done, fail) to arguments (done, fail, progress)\n\t\t\t\t\t\t\tvar fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];\n\n\t\t\t\t\t\t\t// deferred.progress(function() { bind to newDefer or newDefer.notify })\n\t\t\t\t\t\t\t// deferred.done(function() { bind to newDefer or newDefer.resolve })\n\t\t\t\t\t\t\t// deferred.fail(function() { bind to newDefer or newDefer.reject })\n\t\t\t\t\t\t\tdeferred[ tuple[ 1 ] ]( function() {\n\t\t\t\t\t\t\t\tvar returned = fn && fn.apply( this, arguments );\n\t\t\t\t\t\t\t\tif ( returned && isFunction( returned.promise ) ) {\n\t\t\t\t\t\t\t\t\treturned.promise()\n\t\t\t\t\t\t\t\t\t\t.progress( newDefer.notify )\n\t\t\t\t\t\t\t\t\t\t.done( newDefer.resolve )\n\t\t\t\t\t\t\t\t\t\t.fail( newDefer.reject );\n\t\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\t\tnewDefer[ tuple[ 0 ] + \"With\" ](\n\t\t\t\t\t\t\t\t\t\tthis,\n\t\t\t\t\t\t\t\t\t\tfn ? [ returned ] : arguments\n\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} );\n\t\t\t\t\t\tfns = null;\n\t\t\t\t\t} ).promise();\n\t\t\t\t},\n\t\t\t\tthen: function( onFulfilled, onRejected, onProgress ) {\n\t\t\t\t\tvar maxDepth = 0;\n\t\t\t\t\tfunction resolve( depth, deferred, handler, special ) {\n\t\t\t\t\t\treturn function() {\n\t\t\t\t\t\t\tvar that = this,\n\t\t\t\t\t\t\t\targs = arguments,\n\t\t\t\t\t\t\t\tmightThrow = function() {\n\t\t\t\t\t\t\t\t\tvar returned, then;\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.3\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-59\n\t\t\t\t\t\t\t\t\t// Ignore double-resolution attempts\n\t\t\t\t\t\t\t\t\tif ( depth < maxDepth ) {\n\t\t\t\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\treturned = handler.apply( that, args );\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.1\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-48\n\t\t\t\t\t\t\t\t\tif ( returned === deferred.promise() ) {\n\t\t\t\t\t\t\t\t\t\tthrow new TypeError( \"Thenable self-resolution\" );\n\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ sections 2.3.3.1, 3.5\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-54\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-75\n\t\t\t\t\t\t\t\t\t// Retrieve `then` only once\n\t\t\t\t\t\t\t\t\tthen = returned &&\n\n\t\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.4\n\t\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-64\n\t\t\t\t\t\t\t\t\t\t// Only check objects and functions for thenability\n\t\t\t\t\t\t\t\t\t\t( typeof returned === \"object\" ||\n\t\t\t\t\t\t\t\t\t\t\ttypeof returned === \"function\" ) &&\n\t\t\t\t\t\t\t\t\t\treturned.then;\n\n\t\t\t\t\t\t\t\t\t// Handle a returned thenable\n\t\t\t\t\t\t\t\t\tif ( isFunction( then ) ) {\n\n\t\t\t\t\t\t\t\t\t\t// Special processors (notify) just wait for resolution\n\t\t\t\t\t\t\t\t\t\tif ( special ) {\n\t\t\t\t\t\t\t\t\t\t\tthen.call(\n\t\t\t\t\t\t\t\t\t\t\t\treturned,\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Thrower, special )\n\t\t\t\t\t\t\t\t\t\t\t);\n\n\t\t\t\t\t\t\t\t\t\t// Normal processors (resolve) also hook into progress\n\t\t\t\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t\t\t\t// ...and disregard older resolution values\n\t\t\t\t\t\t\t\t\t\t\tmaxDepth++;\n\n\t\t\t\t\t\t\t\t\t\t\tthen.call(\n\t\t\t\t\t\t\t\t\t\t\t\treturned,\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Thrower, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity,\n\t\t\t\t\t\t\t\t\t\t\t\t\tdeferred.notifyWith )\n\t\t\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t// Handle all other returned values\n\t\t\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t\t\t// Only substitute handlers pass on context\n\t\t\t\t\t\t\t\t\t\t// and multiple values (non-spec behavior)\n\t\t\t\t\t\t\t\t\t\tif ( handler !== Identity ) {\n\t\t\t\t\t\t\t\t\t\t\tthat = undefined;\n\t\t\t\t\t\t\t\t\t\t\targs = [ returned ];\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t// Process the value(s)\n\t\t\t\t\t\t\t\t\t\t// Default process is resolve\n\t\t\t\t\t\t\t\t\t\t( special || deferred.resolveWith )( that, args );\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t},\n\n\t\t\t\t\t\t\t\t// Only normal processors (resolve) catch and reject exceptions\n\t\t\t\t\t\t\t\tprocess = special ?\n\t\t\t\t\t\t\t\t\tmightThrow :\n\t\t\t\t\t\t\t\t\tfunction() {\n\t\t\t\t\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\t\t\t\t\tmightThrow();\n\t\t\t\t\t\t\t\t\t\t} catch ( e ) {\n\n\t\t\t\t\t\t\t\t\t\t\tif ( jQuery.Deferred.exceptionHook ) {\n\t\t\t\t\t\t\t\t\t\t\t\tjQuery.Deferred.exceptionHook( e,\n\t\t\t\t\t\t\t\t\t\t\t\t\tprocess.stackTrace );\n\t\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.4.1\n\t\t\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-61\n\t\t\t\t\t\t\t\t\t\t\t// Ignore post-resolution exceptions\n\t\t\t\t\t\t\t\t\t\t\tif ( depth + 1 >= maxDepth ) {\n\n\t\t\t\t\t\t\t\t\t\t\t\t// Only substitute handlers pass on context\n\t\t\t\t\t\t\t\t\t\t\t\t// and multiple values (non-spec behavior)\n\t\t\t\t\t\t\t\t\t\t\t\tif ( handler !== Thrower ) {\n\t\t\t\t\t\t\t\t\t\t\t\t\tthat = undefined;\n\t\t\t\t\t\t\t\t\t\t\t\t\targs = [ e ];\n\t\t\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t\t\tdeferred.rejectWith( that, args );\n\t\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t};\n\n\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.1\n\t\t\t\t\t\t\t// https://promisesaplus.com/#point-57\n\t\t\t\t\t\t\t// Re-resolve promises immediately to dodge false rejection from\n\t\t\t\t\t\t\t// subsequent errors\n\t\t\t\t\t\t\tif ( depth ) {\n\t\t\t\t\t\t\t\tprocess();\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t// Call an optional hook to record the stack, in case of exception\n\t\t\t\t\t\t\t\t// since it's otherwise lost when execution goes async\n\t\t\t\t\t\t\t\tif ( jQuery.Deferred.getStackHook ) {\n\t\t\t\t\t\t\t\t\tprocess.stackTrace = jQuery.Deferred.getStackHook();\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\twindow.setTimeout( process );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t};\n\t\t\t\t\t}\n\n\t\t\t\t\treturn jQuery.Deferred( function( newDefer ) {\n\n\t\t\t\t\t\t// progress_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 0 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onProgress ) ?\n\t\t\t\t\t\t\t\t\tonProgress :\n\t\t\t\t\t\t\t\t\tIdentity,\n\t\t\t\t\t\t\t\tnewDefer.notifyWith\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\t// fulfilled_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 1 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onFulfilled ) ?\n\t\t\t\t\t\t\t\t\tonFulfilled :\n\t\t\t\t\t\t\t\t\tIdentity\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\t// rejected_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 2 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onRejected ) ?\n\t\t\t\t\t\t\t\t\tonRejected :\n\t\t\t\t\t\t\t\t\tThrower\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\t\t\t\t\t} ).promise();\n\t\t\t\t},\n\n\t\t\t\t// Get a promise for this deferred\n\t\t\t\t// If obj is provided, the promise aspect is added to the object\n\t\t\t\tpromise: function( obj ) {\n\t\t\t\t\treturn obj != null ? jQuery.extend( obj, promise ) : promise;\n\t\t\t\t}\n\t\t\t},\n\t\t\tdeferred = {};\n\n\t\t// Add list-specific methods\n\t\tjQuery.each( tuples, function( i, tuple ) {\n\t\t\tvar list = tuple[ 2 ],\n\t\t\t\tstateString = tuple[ 5 ];\n\n\t\t\t// promise.progress = list.add\n\t\t\t// promise.done = list.add\n\t\t\t// promise.fail = list.add\n\t\t\tpromise[ tuple[ 1 ] ] = list.add;\n\n\t\t\t// Handle state\n\t\t\tif ( stateString ) {\n\t\t\t\tlist.add(\n\t\t\t\t\tfunction() {\n\n\t\t\t\t\t\t// state = \"resolved\" (i.e., fulfilled)\n\t\t\t\t\t\t// state = \"rejected\"\n\t\t\t\t\t\tstate = stateString;\n\t\t\t\t\t},\n\n\t\t\t\t\t// rejected_callbacks.disable\n\t\t\t\t\t// fulfilled_callbacks.disable\n\t\t\t\t\ttuples[ 3 - i ][ 2 ].disable,\n\n\t\t\t\t\t// rejected_handlers.disable\n\t\t\t\t\t// fulfilled_handlers.disable\n\t\t\t\t\ttuples[ 3 - i ][ 3 ].disable,\n\n\t\t\t\t\t// progress_callbacks.lock\n\t\t\t\t\ttuples[ 0 ][ 2 ].lock,\n\n\t\t\t\t\t// progress_handlers.lock\n\t\t\t\t\ttuples[ 0 ][ 3 ].lock\n\t\t\t\t);\n\t\t\t}\n\n\t\t\t// progress_handlers.fire\n\t\t\t// fulfilled_handlers.fire\n\t\t\t// rejected_handlers.fire\n\t\t\tlist.add( tuple[ 3 ].fire );\n\n\t\t\t// deferred.notify = function() { deferred.notifyWith(...) }\n\t\t\t// deferred.resolve = function() { deferred.resolveWith(...) }\n\t\t\t// deferred.reject = function() { deferred.rejectWith(...) }\n\t\t\tdeferred[ tuple[ 0 ] ] = function() {\n\t\t\t\tdeferred[ tuple[ 0 ] + \"With\" ]( this === deferred ? undefined : this, arguments );\n\t\t\t\treturn this;\n\t\t\t};\n\n\t\t\t// deferred.notifyWith = list.fireWith\n\t\t\t// deferred.resolveWith = list.fireWith\n\t\t\t// deferred.rejectWith = list.fireWith\n\t\t\tdeferred[ tuple[ 0 ] + \"With\" ] = list.fireWith;\n\t\t} );\n\n\t\t// Make the deferred a promise\n\t\tpromise.promise( deferred );\n\n\t\t// Call given func if any\n\t\tif ( func ) {\n\t\t\tfunc.call( deferred, deferred );\n\t\t}\n\n\t\t// All done!\n\t\treturn deferred;\n\t},\n\n\t// Deferred helper\n\twhen: function( singleValue ) {\n\t\tvar\n\n\t\t\t// count of uncompleted subordinates\n\t\t\tremaining = arguments.length,\n\n\t\t\t// count of unprocessed arguments\n\t\t\ti = remaining,\n\n\t\t\t// subordinate fulfillment data\n\t\t\tresolveContexts = Array( i ),\n\t\t\tresolveValues = slice.call( arguments ),\n\n\t\t\t// the master Deferred\n\t\t\tmaster = jQuery.Deferred(),\n\n\t\t\t// subordinate callback factory\n\t\t\tupdateFunc = function( i ) {\n\t\t\t\treturn function( value ) {\n\t\t\t\t\tresolveContexts[ i ] = this;\n\t\t\t\t\tresolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;\n\t\t\t\t\tif ( !( --remaining ) ) {\n\t\t\t\t\t\tmaster.resolveWith( resolveContexts, resolveValues );\n\t\t\t\t\t}\n\t\t\t\t};\n\t\t\t};\n\n\t\t// Single- and empty arguments are adopted like Promise.resolve\n\t\tif ( remaining <= 1 ) {\n\t\t\tadoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,\n\t\t\t\t!remaining );\n\n\t\t\t// Use .then() to unwrap secondary thenables (cf. gh-3000)\n\t\t\tif ( master.state() === \"pending\" ||\n\t\t\t\tisFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {\n\n\t\t\t\treturn master.then();\n\t\t\t}\n\t\t}\n\n\t\t// Multiple arguments are aggregated like Promise.all array elements\n\t\twhile ( i-- ) {\n\t\t\tadoptValue( resolveValues[ i ], updateFunc( i ), master.reject );\n\t\t}\n\n\t\treturn master.promise();\n\t}\n} );\n\n\n// These usually indicate a programmer mistake during development,\n// warn about them ASAP rather than swallowing them by default.\nvar rerrorNames = /^(Eval|Internal|Range|Reference|Syntax|Type|URI)Error$/;\n\njQuery.Deferred.exceptionHook = function( error, stack ) {\n\n\t// Support: IE 8 - 9 only\n\t// Console exists when dev tools are open, which can happen at any time\n\tif ( window.console && window.console.warn && error && rerrorNames.test( error.name ) ) {\n\t\twindow.console.warn( \"jQuery.Deferred exception: \" + error.message, error.stack, stack );\n\t}\n};\n\n\n\n\njQuery.readyException = function( error ) {\n\twindow.setTimeout( function() {\n\t\tthrow error;\n\t} );\n};\n\n\n\n\n// The deferred used on DOM ready\nvar readyList = jQuery.Deferred();\n\njQuery.fn.ready = function( fn ) {\n\n\treadyList\n\t\t.then( fn )\n\n\t\t// Wrap jQuery.readyException in a function so that the lookup\n\t\t// happens at the time of error handling instead of callback\n\t\t// registration.\n\t\t.catch( function( error ) {\n\t\t\tjQuery.readyException( error );\n\t\t} );\n\n\treturn this;\n};\n\njQuery.extend( {\n\n\t// Is the DOM ready to be used? Set to true once it occurs.\n\tisReady: false,\n\n\t// A counter to track how many items to wait for before\n\t// the ready event fires. See #6781\n\treadyWait: 1,\n\n\t// Handle when the DOM is ready\n\tready: function( wait ) {\n\n\t\t// Abort if there are pending holds or we're already ready\n\t\tif ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Remember that the DOM is ready\n\t\tjQuery.isReady = true;\n\n\t\t// If a normal DOM Ready event fired, decrement, and wait if need be\n\t\tif ( wait !== true && --jQuery.readyWait > 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If there are functions bound, to execute\n\t\treadyList.resolveWith( document, [ jQuery ] );\n\t}\n} );\n\njQuery.ready.then = readyList.then;\n\n// The ready event handler and self cleanup method\nfunction completed() {\n\tdocument.removeEventListener( \"DOMContentLoaded\", completed );\n\twindow.removeEventListener( \"load\", completed );\n\tjQuery.ready();\n}\n\n// Catch cases where $(document).ready() is called\n// after the browser event has already occurred.\n// Support: IE <=9 - 10 only\n// Older IE sometimes signals \"interactive\" too soon\nif ( document.readyState === \"complete\" ||\n\t( document.readyState !== \"loading\" && !document.documentElement.doScroll ) ) {\n\n\t// Handle it asynchronously to allow scripts the opportunity to delay ready\n\twindow.setTimeout( jQuery.ready );\n\n} else {\n\n\t// Use the handy event callback\n\tdocument.addEventListener( \"DOMContentLoaded\", completed );\n\n\t// A fallback to window.onload, that will always work\n\twindow.addEventListener( \"load\", completed );\n}\n\n\n\n\n// Multifunctional method to get and set values of a collection\n// The value/s can optionally be executed if it's a function\nvar access = function( elems, fn, key, value, chainable, emptyGet, raw ) {\n\tvar i = 0,\n\t\tlen = elems.length,\n\t\tbulk = key == null;\n\n\t// Sets many values\n\tif ( toType( key ) === \"object\" ) {\n\t\tchainable = true;\n\t\tfor ( i in key ) {\n\t\t\taccess( elems, fn, i, key[ i ], true, emptyGet, raw );\n\t\t}\n\n\t// Sets one value\n\t} else if ( value !== undefined ) {\n\t\tchainable = true;\n\n\t\tif ( !isFunction( value ) ) {\n\t\t\traw = true;\n\t\t}\n\n\t\tif ( bulk ) {\n\n\t\t\t// Bulk operations run against the entire set\n\t\t\tif ( raw ) {\n\t\t\t\tfn.call( elems, value );\n\t\t\t\tfn = null;\n\n\t\t\t// ...except when executing function values\n\t\t\t} else {\n\t\t\t\tbulk = fn;\n\t\t\t\tfn = function( elem, key, value ) {\n\t\t\t\t\treturn bulk.call( jQuery( elem ), value );\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\tif ( fn ) {\n\t\t\tfor ( ; i < len; i++ ) {\n\t\t\t\tfn(\n\t\t\t\t\telems[ i ], key, raw ?\n\t\t\t\t\tvalue :\n\t\t\t\t\tvalue.call( elems[ i ], i, fn( elems[ i ], key ) )\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\tif ( chainable ) {\n\t\treturn elems;\n\t}\n\n\t// Gets\n\tif ( bulk ) {\n\t\treturn fn.call( elems );\n\t}\n\n\treturn len ? fn( elems[ 0 ], key ) : emptyGet;\n};\n\n\n// Matches dashed string for camelizing\nvar rmsPrefix = /^-ms-/,\n\trdashAlpha = /-([a-z])/g;\n\n// Used by camelCase as callback to replace()\nfunction fcamelCase( all, letter ) {\n\treturn letter.toUpperCase();\n}\n\n// Convert dashed to camelCase; used by the css and data modules\n// Support: IE <=9 - 11, Edge 12 - 15\n// Microsoft forgot to hump their vendor prefix (#9572)\nfunction camelCase( string ) {\n\treturn string.replace( rmsPrefix, \"ms-\" ).replace( rdashAlpha, fcamelCase );\n}\nvar acceptData = function( owner ) {\n\n\t// Accepts only:\n\t// - Node\n\t// - Node.ELEMENT_NODE\n\t// - Node.DOCUMENT_NODE\n\t// - Object\n\t// - Any\n\treturn owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );\n};\n\n\n\n\nfunction Data() {\n\tthis.expando = jQuery.expando + Data.uid++;\n}\n\nData.uid = 1;\n\nData.prototype = {\n\n\tcache: function( owner ) {\n\n\t\t// Check if the owner object already has a cache\n\t\tvar value = owner[ this.expando ];\n\n\t\t// If not, create one\n\t\tif ( !value ) {\n\t\t\tvalue = {};\n\n\t\t\t// We can accept data for non-element nodes in modern browsers,\n\t\t\t// but we should not, see #8335.\n\t\t\t// Always return an empty object.\n\t\t\tif ( acceptData( owner ) ) {\n\n\t\t\t\t// If it is a node unlikely to be stringify-ed or looped over\n\t\t\t\t// use plain assignment\n\t\t\t\tif ( owner.nodeType ) {\n\t\t\t\t\towner[ this.expando ] = value;\n\n\t\t\t\t// Otherwise secure it in a non-enumerable property\n\t\t\t\t// configurable must be true to allow the property to be\n\t\t\t\t// deleted when data is removed\n\t\t\t\t} else {\n\t\t\t\t\tObject.defineProperty( owner, this.expando, {\n\t\t\t\t\t\tvalue: value,\n\t\t\t\t\t\tconfigurable: true\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn value;\n\t},\n\tset: function( owner, data, value ) {\n\t\tvar prop,\n\t\t\tcache = this.cache( owner );\n\n\t\t// Handle: [ owner, key, value ] args\n\t\t// Always use camelCase key (gh-2257)\n\t\tif ( typeof data === \"string\" ) {\n\t\t\tcache[ camelCase( data ) ] = value;\n\n\t\t// Handle: [ owner, { properties } ] args\n\t\t} else {\n\n\t\t\t// Copy the properties one-by-one to the cache object\n\t\t\tfor ( prop in data ) {\n\t\t\t\tcache[ camelCase( prop ) ] = data[ prop ];\n\t\t\t}\n\t\t}\n\t\treturn cache;\n\t},\n\tget: function( owner, key ) {\n\t\treturn key === undefined ?\n\t\t\tthis.cache( owner ) :\n\n\t\t\t// Always use camelCase key (gh-2257)\n\t\t\towner[ this.expando ] && owner[ this.expando ][ camelCase( key ) ];\n\t},\n\taccess: function( owner, key, value ) {\n\n\t\t// In cases where either:\n\t\t//\n\t\t// 1. No key was specified\n\t\t// 2. A string key was specified, but no value provided\n\t\t//\n\t\t// Take the \"read\" path and allow the get method to determine\n\t\t// which value to return, respectively either:\n\t\t//\n\t\t// 1. The entire cache object\n\t\t// 2. The data stored at the key\n\t\t//\n\t\tif ( key === undefined ||\n\t\t\t\t( ( key && typeof key === \"string\" ) && value === undefined ) ) {\n\n\t\t\treturn this.get( owner, key );\n\t\t}\n\n\t\t// When the key is not a string, or both a key and value\n\t\t// are specified, set or extend (existing objects) with either:\n\t\t//\n\t\t// 1. An object of properties\n\t\t// 2. A key and value\n\t\t//\n\t\tthis.set( owner, key, value );\n\n\t\t// Since the \"set\" path can have two possible entry points\n\t\t// return the expected data based on which path was taken[*]\n\t\treturn value !== undefined ? value : key;\n\t},\n\tremove: function( owner, key ) {\n\t\tvar i,\n\t\t\tcache = owner[ this.expando ];\n\n\t\tif ( cache === undefined ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( key !== undefined ) {\n\n\t\t\t// Support array or space separated string of keys\n\t\t\tif ( Array.isArray( key ) ) {\n\n\t\t\t\t// If key is an array of keys...\n\t\t\t\t// We always set camelCase keys, so remove that.\n\t\t\t\tkey = key.map( camelCase );\n\t\t\t} else {\n\t\t\t\tkey = camelCase( key );\n\n\t\t\t\t// If a key with the spaces exists, use it.\n\t\t\t\t// Otherwise, create an array by matching non-whitespace\n\t\t\t\tkey = key in cache ?\n\t\t\t\t\t[ key ] :\n\t\t\t\t\t( key.match( rnothtmlwhite ) || [] );\n\t\t\t}\n\n\t\t\ti = key.length;\n\n\t\t\twhile ( i-- ) {\n\t\t\t\tdelete cache[ key[ i ] ];\n\t\t\t}\n\t\t}\n\n\t\t// Remove the expando if there's no more data\n\t\tif ( key === undefined || jQuery.isEmptyObject( cache ) ) {\n\n\t\t\t// Support: Chrome <=35 - 45\n\t\t\t// Webkit & Blink performance suffers when deleting properties\n\t\t\t// from DOM nodes, so set to undefined instead\n\t\t\t// https://bugs.chromium.org/p/chromium/issues/detail?id=378607 (bug restricted)\n\t\t\tif ( owner.nodeType ) {\n\t\t\t\towner[ this.expando ] = undefined;\n\t\t\t} else {\n\t\t\t\tdelete owner[ this.expando ];\n\t\t\t}\n\t\t}\n\t},\n\thasData: function( owner ) {\n\t\tvar cache = owner[ this.expando ];\n\t\treturn cache !== undefined && !jQuery.isEmptyObject( cache );\n\t}\n};\nvar dataPriv = new Data();\n\nvar dataUser = new Data();\n\n\n\n//\tImplementation Summary\n//\n//\t1. Enforce API surface and semantic compatibility with 1.9.x branch\n//\t2. Improve the module's maintainability by reducing the storage\n//\t\tpaths to a single mechanism.\n//\t3. Use the same single mechanism to support \"private\" and \"user\" data.\n//\t4. _Never_ expose \"private\" data to user code (TODO: Drop _data, _removeData)\n//\t5. Avoid exposing implementation details on user objects (eg. expando properties)\n//\t6. Provide a clear path for implementation upgrade to WeakMap in 2014\n\nvar rbrace = /^(?:\\{[\\w\\W]*\\}|\\[[\\w\\W]*\\])$/,\n\trmultiDash = /[A-Z]/g;\n\nfunction getData( data ) {\n\tif ( data === \"true\" ) {\n\t\treturn true;\n\t}\n\n\tif ( data === \"false\" ) {\n\t\treturn false;\n\t}\n\n\tif ( data === \"null\" ) {\n\t\treturn null;\n\t}\n\n\t// Only convert to a number if it doesn't change the string\n\tif ( data === +data + \"\" ) {\n\t\treturn +data;\n\t}\n\n\tif ( rbrace.test( data ) ) {\n\t\treturn JSON.parse( data );\n\t}\n\n\treturn data;\n}\n\nfunction dataAttr( elem, key, data ) {\n\tvar name;\n\n\t// If nothing was found internally, try to fetch any\n\t// data from the HTML5 data-* attribute\n\tif ( data === undefined && elem.nodeType === 1 ) {\n\t\tname = \"data-\" + key.replace( rmultiDash, \"-$&\" ).toLowerCase();\n\t\tdata = elem.getAttribute( name );\n\n\t\tif ( typeof data === \"string\" ) {\n\t\t\ttry {\n\t\t\t\tdata = getData( data );\n\t\t\t} catch ( e ) {}\n\n\t\t\t// Make sure we set the data so it isn't changed later\n\t\t\tdataUser.set( elem, key, data );\n\t\t} else {\n\t\t\tdata = undefined;\n\t\t}\n\t}\n\treturn data;\n}\n\njQuery.extend( {\n\thasData: function( elem ) {\n\t\treturn dataUser.hasData( elem ) || dataPriv.hasData( elem );\n\t},\n\n\tdata: function( elem, name, data ) {\n\t\treturn dataUser.access( elem, name, data );\n\t},\n\n\tremoveData: function( elem, name ) {\n\t\tdataUser.remove( elem, name );\n\t},\n\n\t// TODO: Now that all calls to _data and _removeData have been replaced\n\t// with direct calls to dataPriv methods, these can be deprecated.\n\t_data: function( elem, name, data ) {\n\t\treturn dataPriv.access( elem, name, data );\n\t},\n\n\t_removeData: function( elem, name ) {\n\t\tdataPriv.remove( elem, name );\n\t}\n} );\n\njQuery.fn.extend( {\n\tdata: function( key, value ) {\n\t\tvar i, name, data,\n\t\t\telem = this[ 0 ],\n\t\t\tattrs = elem && elem.attributes;\n\n\t\t// Gets all values\n\t\tif ( key === undefined ) {\n\t\t\tif ( this.length ) {\n\t\t\t\tdata = dataUser.get( elem );\n\n\t\t\t\tif ( elem.nodeType === 1 && !dataPriv.get( elem, \"hasDataAttrs\" ) ) {\n\t\t\t\t\ti = attrs.length;\n\t\t\t\t\twhile ( i-- ) {\n\n\t\t\t\t\t\t// Support: IE 11 only\n\t\t\t\t\t\t// The attrs elements can be null (#14894)\n\t\t\t\t\t\tif ( attrs[ i ] ) {\n\t\t\t\t\t\t\tname = attrs[ i ].name;\n\t\t\t\t\t\t\tif ( name.indexOf( \"data-\" ) === 0 ) {\n\t\t\t\t\t\t\t\tname = camelCase( name.slice( 5 ) );\n\t\t\t\t\t\t\t\tdataAttr( elem, name, data[ name ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tdataPriv.set( elem, \"hasDataAttrs\", true );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn data;\n\t\t}\n\n\t\t// Sets multiple values\n\t\tif ( typeof key === \"object\" ) {\n\t\t\treturn this.each( function() {\n\t\t\t\tdataUser.set( this, key );\n\t\t\t} );\n\t\t}\n\n\t\treturn access( this, function( value ) {\n\t\t\tvar data;\n\n\t\t\t// The calling jQuery object (element matches) is not empty\n\t\t\t// (and therefore has an element appears at this[ 0 ]) and the\n\t\t\t// `value` parameter was not undefined. An empty jQuery object\n\t\t\t// will result in `undefined` for elem = this[ 0 ] which will\n\t\t\t// throw an exception if an attempt to read a data cache is made.\n\t\t\tif ( elem && value === undefined ) {\n\n\t\t\t\t// Attempt to get data from the cache\n\t\t\t\t// The key will always be camelCased in Data\n\t\t\t\tdata = dataUser.get( elem, key );\n\t\t\t\tif ( data !== undefined ) {\n\t\t\t\t\treturn data;\n\t\t\t\t}\n\n\t\t\t\t// Attempt to \"discover\" the data in\n\t\t\t\t// HTML5 custom data-* attrs\n\t\t\t\tdata = dataAttr( elem, key );\n\t\t\t\tif ( data !== undefined ) {\n\t\t\t\t\treturn data;\n\t\t\t\t}\n\n\t\t\t\t// We tried really hard, but the data doesn't exist.\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Set the data...\n\t\t\tthis.each( function() {\n\n\t\t\t\t// We always store the camelCased key\n\t\t\t\tdataUser.set( this, key, value );\n\t\t\t} );\n\t\t}, null, value, arguments.length > 1, null, true );\n\t},\n\n\tremoveData: function( key ) {\n\t\treturn this.each( function() {\n\t\t\tdataUser.remove( this, key );\n\t\t} );\n\t}\n} );\n\n\njQuery.extend( {\n\tqueue: function( elem, type, data ) {\n\t\tvar queue;\n\n\t\tif ( elem ) {\n\t\t\ttype = ( type || \"fx\" ) + \"queue\";\n\t\t\tqueue = dataPriv.get( elem, type );\n\n\t\t\t// Speed up dequeue by getting out quickly if this is just a lookup\n\t\t\tif ( data ) {\n\t\t\t\tif ( !queue || Array.isArray( data ) ) {\n\t\t\t\t\tqueue = dataPriv.access( elem, type, jQuery.makeArray( data ) );\n\t\t\t\t} else {\n\t\t\t\t\tqueue.push( data );\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn queue || [];\n\t\t}\n\t},\n\n\tdequeue: function( elem, type ) {\n\t\ttype = type || \"fx\";\n\n\t\tvar queue = jQuery.queue( elem, type ),\n\t\t\tstartLength = queue.length,\n\t\t\tfn = queue.shift(),\n\t\t\thooks = jQuery._queueHooks( elem, type ),\n\t\t\tnext = function() {\n\t\t\t\tjQuery.dequeue( elem, type );\n\t\t\t};\n\n\t\t// If the fx queue is dequeued, always remove the progress sentinel\n\t\tif ( fn === \"inprogress\" ) {\n\t\t\tfn = queue.shift();\n\t\t\tstartLength--;\n\t\t}\n\n\t\tif ( fn ) {\n\n\t\t\t// Add a progress sentinel to prevent the fx queue from being\n\t\t\t// automatically dequeued\n\t\t\tif ( type === \"fx\" ) {\n\t\t\t\tqueue.unshift( \"inprogress\" );\n\t\t\t}\n\n\t\t\t// Clear up the last queue stop function\n\t\t\tdelete hooks.stop;\n\t\t\tfn.call( elem, next, hooks );\n\t\t}\n\n\t\tif ( !startLength && hooks ) {\n\t\t\thooks.empty.fire();\n\t\t}\n\t},\n\n\t// Not public - generate a queueHooks object, or return the current one\n\t_queueHooks: function( elem, type ) {\n\t\tvar key = type + \"queueHooks\";\n\t\treturn dataPriv.get( elem, key ) || dataPriv.access( elem, key, {\n\t\t\tempty: jQuery.Callbacks( \"once memory\" ).add( function() {\n\t\t\t\tdataPriv.remove( elem, [ type + \"queue\", key ] );\n\t\t\t} )\n\t\t} );\n\t}\n} );\n\njQuery.fn.extend( {\n\tqueue: function( type, data ) {\n\t\tvar setter = 2;\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tdata = type;\n\t\t\ttype = \"fx\";\n\t\t\tsetter--;\n\t\t}\n\n\t\tif ( arguments.length < setter ) {\n\t\t\treturn jQuery.queue( this[ 0 ], type );\n\t\t}\n\n\t\treturn data === undefined ?\n\t\t\tthis :\n\t\t\tthis.each( function() {\n\t\t\t\tvar queue = jQuery.queue( this, type, data );\n\n\t\t\t\t// Ensure a hooks for this queue\n\t\t\t\tjQuery._queueHooks( this, type );\n\n\t\t\t\tif ( type === \"fx\" && queue[ 0 ] !== \"inprogress\" ) {\n\t\t\t\t\tjQuery.dequeue( this, type );\n\t\t\t\t}\n\t\t\t} );\n\t},\n\tdequeue: function( type ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.dequeue( this, type );\n\t\t} );\n\t},\n\tclearQueue: function( type ) {\n\t\treturn this.queue( type || \"fx\", [] );\n\t},\n\n\t// Get a promise resolved when queues of a certain type\n\t// are emptied (fx is the type by default)\n\tpromise: function( type, obj ) {\n\t\tvar tmp,\n\t\t\tcount = 1,\n\t\t\tdefer = jQuery.Deferred(),\n\t\t\telements = this,\n\t\t\ti = this.length,\n\t\t\tresolve = function() {\n\t\t\t\tif ( !( --count ) ) {\n\t\t\t\t\tdefer.resolveWith( elements, [ elements ] );\n\t\t\t\t}\n\t\t\t};\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tobj = type;\n\t\t\ttype = undefined;\n\t\t}\n\t\ttype = type || \"fx\";\n\n\t\twhile ( i-- ) {\n\t\t\ttmp = dataPriv.get( elements[ i ], type + \"queueHooks\" );\n\t\t\tif ( tmp && tmp.empty ) {\n\t\t\t\tcount++;\n\t\t\t\ttmp.empty.add( resolve );\n\t\t\t}\n\t\t}\n\t\tresolve();\n\t\treturn defer.promise( obj );\n\t}\n} );\nvar pnum = ( /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/ ).source;\n\nvar rcssNum = new RegExp( \"^(?:([+-])=|)(\" + pnum + \")([a-z%]*)$\", \"i\" );\n\n\nvar cssExpand = [ \"Top\", \"Right\", \"Bottom\", \"Left\" ];\n\nvar documentElement = document.documentElement;\n\n\n\n\tvar isAttached = function( elem ) {\n\t\t\treturn jQuery.contains( elem.ownerDocument, elem );\n\t\t},\n\t\tcomposed = { composed: true };\n\n\t// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only\n\t// Check attachment across shadow DOM boundaries when possible (gh-3504)\n\t// Support: iOS 10.0-10.2 only\n\t// Early iOS 10 versions support `attachShadow` but not `getRootNode`,\n\t// leading to errors. We need to check for `getRootNode`.\n\tif ( documentElement.getRootNode ) {\n\t\tisAttached = function( elem ) {\n\t\t\treturn jQuery.contains( elem.ownerDocument, elem ) ||\n\t\t\t\telem.getRootNode( composed ) === elem.ownerDocument;\n\t\t};\n\t}\nvar isHiddenWithinTree = function( elem, el ) {\n\n\t\t// isHiddenWithinTree might be called from jQuery#filter function;\n\t\t// in that case, element will be second argument\n\t\telem = el || elem;\n\n\t\t// Inline style trumps all\n\t\treturn elem.style.display === \"none\" ||\n\t\t\telem.style.display === \"\" &&\n\n\t\t\t// Otherwise, check computed style\n\t\t\t// Support: Firefox <=43 - 45\n\t\t\t// Disconnected elements can have computed display: none, so first confirm that elem is\n\t\t\t// in the document.\n\t\t\tisAttached( elem ) &&\n\n\t\t\tjQuery.css( elem, \"display\" ) === \"none\";\n\t};\n\nvar swap = function( elem, options, callback, args ) {\n\tvar ret, name,\n\t\told = {};\n\n\t// Remember the old values, and insert the new ones\n\tfor ( name in options ) {\n\t\told[ name ] = elem.style[ name ];\n\t\telem.style[ name ] = options[ name ];\n\t}\n\n\tret = callback.apply( elem, args || [] );\n\n\t// Revert the old values\n\tfor ( name in options ) {\n\t\telem.style[ name ] = old[ name ];\n\t}\n\n\treturn ret;\n};\n\n\n\n\nfunction adjustCSS( elem, prop, valueParts, tween ) {\n\tvar adjusted, scale,\n\t\tmaxIterations = 20,\n\t\tcurrentValue = tween ?\n\t\t\tfunction() {\n\t\t\t\treturn tween.cur();\n\t\t\t} :\n\t\t\tfunction() {\n\t\t\t\treturn jQuery.css( elem, prop, \"\" );\n\t\t\t},\n\t\tinitial = currentValue(),\n\t\tunit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? \"\" : \"px\" ),\n\n\t\t// Starting value computation is required for potential unit mismatches\n\t\tinitialInUnit = elem.nodeType &&\n\t\t\t( jQuery.cssNumber[ prop ] || unit !== \"px\" && +initial ) &&\n\t\t\trcssNum.exec( jQuery.css( elem, prop ) );\n\n\tif ( initialInUnit && initialInUnit[ 3 ] !== unit ) {\n\n\t\t// Support: Firefox <=54\n\t\t// Halve the iteration target value to prevent interference from CSS upper bounds (gh-2144)\n\t\tinitial = initial / 2;\n\n\t\t// Trust units reported by jQuery.css\n\t\tunit = unit || initialInUnit[ 3 ];\n\n\t\t// Iteratively approximate from a nonzero starting point\n\t\tinitialInUnit = +initial || 1;\n\n\t\twhile ( maxIterations-- ) {\n\n\t\t\t// Evaluate and update our best guess (doubling guesses that zero out).\n\t\t\t// Finish if the scale equals or crosses 1 (making the old*new product non-positive).\n\t\t\tjQuery.style( elem, prop, initialInUnit + unit );\n\t\t\tif ( ( 1 - scale ) * ( 1 - ( scale = currentValue() / initial || 0.5 ) ) <= 0 ) {\n\t\t\t\tmaxIterations = 0;\n\t\t\t}\n\t\t\tinitialInUnit = initialInUnit / scale;\n\n\t\t}\n\n\t\tinitialInUnit = initialInUnit * 2;\n\t\tjQuery.style( elem, prop, initialInUnit + unit );\n\n\t\t// Make sure we update the tween properties later on\n\t\tvalueParts = valueParts || [];\n\t}\n\n\tif ( valueParts ) {\n\t\tinitialInUnit = +initialInUnit || +initial || 0;\n\n\t\t// Apply relative offset (+=/-=) if specified\n\t\tadjusted = valueParts[ 1 ] ?\n\t\t\tinitialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :\n\t\t\t+valueParts[ 2 ];\n\t\tif ( tween ) {\n\t\t\ttween.unit = unit;\n\t\t\ttween.start = initialInUnit;\n\t\t\ttween.end = adjusted;\n\t\t}\n\t}\n\treturn adjusted;\n}\n\n\nvar defaultDisplayMap = {};\n\nfunction getDefaultDisplay( elem ) {\n\tvar temp,\n\t\tdoc = elem.ownerDocument,\n\t\tnodeName = elem.nodeName,\n\t\tdisplay = defaultDisplayMap[ nodeName ];\n\n\tif ( display ) {\n\t\treturn display;\n\t}\n\n\ttemp = doc.body.appendChild( doc.createElement( nodeName ) );\n\tdisplay = jQuery.css( temp, \"display\" );\n\n\ttemp.parentNode.removeChild( temp );\n\n\tif ( display === \"none\" ) {\n\t\tdisplay = \"block\";\n\t}\n\tdefaultDisplayMap[ nodeName ] = display;\n\n\treturn display;\n}\n\nfunction showHide( elements, show ) {\n\tvar display, elem,\n\t\tvalues = [],\n\t\tindex = 0,\n\t\tlength = elements.length;\n\n\t// Determine new display value for elements that need to change\n\tfor ( ; index < length; index++ ) {\n\t\telem = elements[ index ];\n\t\tif ( !elem.style ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tdisplay = elem.style.display;\n\t\tif ( show ) {\n\n\t\t\t// Since we force visibility upon cascade-hidden elements, an immediate (and slow)\n\t\t\t// check is required in this first loop unless we have a nonempty display value (either\n\t\t\t// inline or about-to-be-restored)\n\t\t\tif ( display === \"none\" ) {\n\t\t\t\tvalues[ index ] = dataPriv.get( elem, \"display\" ) || null;\n\t\t\t\tif ( !values[ index ] ) {\n\t\t\t\t\telem.style.display = \"\";\n\t\t\t\t}\n\t\t\t}\n\t\t\tif ( elem.style.display === \"\" && isHiddenWithinTree( elem ) ) {\n\t\t\t\tvalues[ index ] = getDefaultDisplay( elem );\n\t\t\t}\n\t\t} else {\n\t\t\tif ( display !== \"none\" ) {\n\t\t\t\tvalues[ index ] = \"none\";\n\n\t\t\t\t// Remember what we're overwriting\n\t\t\t\tdataPriv.set( elem, \"display\", display );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Set the display of the elements in a second loop to avoid constant reflow\n\tfor ( index = 0; index < length; index++ ) {\n\t\tif ( values[ index ] != null ) {\n\t\t\telements[ index ].style.display = values[ index ];\n\t\t}\n\t}\n\n\treturn elements;\n}\n\njQuery.fn.extend( {\n\tshow: function() {\n\t\treturn showHide( this, true );\n\t},\n\thide: function() {\n\t\treturn showHide( this );\n\t},\n\ttoggle: function( state ) {\n\t\tif ( typeof state === \"boolean\" ) {\n\t\t\treturn state ? this.show() : this.hide();\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tif ( isHiddenWithinTree( this ) ) {\n\t\t\t\tjQuery( this ).show();\n\t\t\t} else {\n\t\t\t\tjQuery( this ).hide();\n\t\t\t}\n\t\t} );\n\t}\n} );\nvar rcheckableType = ( /^(?:checkbox|radio)$/i );\n\nvar rtagName = ( /<([a-z][^\\/\\0>\\x20\\t\\r\\n\\f]*)/i );\n\nvar rscriptType = ( /^$|^module$|\\/(?:java|ecma)script/i );\n\n\n\n// We have to close these tags to support XHTML (#13200)\nvar wrapMap = {\n\n\t// Support: IE <=9 only\n\toption: [ 1, \"<select multiple='multiple'>\", \"</select>\" ],\n\n\t// XHTML parsers do not magically insert elements in the\n\t// same way that tag soup parsers do. So we cannot shorten\n\t// this by omitting <tbody> or other required elements.\n\tthead: [ 1, \"<table>\", \"</table>\" ],\n\tcol: [ 2, \"<table><colgroup>\", \"</colgroup></table>\" ],\n\ttr: [ 2, \"<table><tbody>\", \"</tbody></table>\" ],\n\ttd: [ 3, \"<table><tbody><tr>\", \"</tr></tbody></table>\" ],\n\n\t_default: [ 0, \"\", \"\" ]\n};\n\n// Support: IE <=9 only\nwrapMap.optgroup = wrapMap.option;\n\nwrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;\nwrapMap.th = wrapMap.td;\n\n\nfunction getAll( context, tag ) {\n\n\t// Support: IE <=9 - 11 only\n\t// Use typeof to avoid zero-argument method invocation on host objects (#15151)\n\tvar ret;\n\n\tif ( typeof context.getElementsByTagName !== \"undefined\" ) {\n\t\tret = context.getElementsByTagName( tag || \"*\" );\n\n\t} else if ( typeof context.querySelectorAll !== \"undefined\" ) {\n\t\tret = context.querySelectorAll( tag || \"*\" );\n\n\t} else {\n\t\tret = [];\n\t}\n\n\tif ( tag === undefined || tag && nodeName( context, tag ) ) {\n\t\treturn jQuery.merge( [ context ], ret );\n\t}\n\n\treturn ret;\n}\n\n\n// Mark scripts as having already been evaluated\nfunction setGlobalEval( elems, refElements ) {\n\tvar i = 0,\n\t\tl = elems.length;\n\n\tfor ( ; i < l; i++ ) {\n\t\tdataPriv.set(\n\t\t\telems[ i ],\n\t\t\t\"globalEval\",\n\t\t\t!refElements || dataPriv.get( refElements[ i ], \"globalEval\" )\n\t\t);\n\t}\n}\n\n\nvar rhtml = /<|&#?\\w+;/;\n\nfunction buildFragment( elems, context, scripts, selection, ignored ) {\n\tvar elem, tmp, tag, wrap, attached, j,\n\t\tfragment = context.createDocumentFragment(),\n\t\tnodes = [],\n\t\ti = 0,\n\t\tl = elems.length;\n\n\tfor ( ; i < l; i++ ) {\n\t\telem = elems[ i ];\n\n\t\tif ( elem || elem === 0 ) {\n\n\t\t\t// Add nodes directly\n\t\t\tif ( toType( elem ) === \"object\" ) {\n\n\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\tjQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );\n\n\t\t\t// Convert non-html into a text node\n\t\t\t} else if ( !rhtml.test( elem ) ) {\n\t\t\t\tnodes.push( context.createTextNode( elem ) );\n\n\t\t\t// Convert html into DOM nodes\n\t\t\t} else {\n\t\t\t\ttmp = tmp || fragment.appendChild( context.createElement( \"div\" ) );\n\n\t\t\t\t// Deserialize a standard representation\n\t\t\t\ttag = ( rtagName.exec( elem ) || [ \"\", \"\" ] )[ 1 ].toLowerCase();\n\t\t\t\twrap = wrapMap[ tag ] || wrapMap._default;\n\t\t\t\ttmp.innerHTML = wrap[ 1 ] + jQuery.htmlPrefilter( elem ) + wrap[ 2 ];\n\n\t\t\t\t// Descend through wrappers to the right content\n\t\t\t\tj = wrap[ 0 ];\n\t\t\t\twhile ( j-- ) {\n\t\t\t\t\ttmp = tmp.lastChild;\n\t\t\t\t}\n\n\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\tjQuery.merge( nodes, tmp.childNodes );\n\n\t\t\t\t// Remember the top-level container\n\t\t\t\ttmp = fragment.firstChild;\n\n\t\t\t\t// Ensure the created nodes are orphaned (#12392)\n\t\t\t\ttmp.textContent = \"\";\n\t\t\t}\n\t\t}\n\t}\n\n\t// Remove wrapper from fragment\n\tfragment.textContent = \"\";\n\n\ti = 0;\n\twhile ( ( elem = nodes[ i++ ] ) ) {\n\n\t\t// Skip elements already in the context collection (trac-4087)\n\t\tif ( selection && jQuery.inArray( elem, selection ) > -1 ) {\n\t\t\tif ( ignored ) {\n\t\t\t\tignored.push( elem );\n\t\t\t}\n\t\t\tcontinue;\n\t\t}\n\n\t\tattached = isAttached( elem );\n\n\t\t// Append to fragment\n\t\ttmp = getAll( fragment.appendChild( elem ), \"script\" );\n\n\t\t// Preserve script evaluation history\n\t\tif ( attached ) {\n\t\t\tsetGlobalEval( tmp );\n\t\t}\n\n\t\t// Capture executables\n\t\tif ( scripts ) {\n\t\t\tj = 0;\n\t\t\twhile ( ( elem = tmp[ j++ ] ) ) {\n\t\t\t\tif ( rscriptType.test( elem.type || \"\" ) ) {\n\t\t\t\t\tscripts.push( elem );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn fragment;\n}\n\n\n( function() {\n\tvar fragment = document.createDocumentFragment(),\n\t\tdiv = fragment.appendChild( document.createElement( \"div\" ) ),\n\t\tinput = document.createElement( \"input\" );\n\n\t// Support: Android 4.0 - 4.3 only\n\t// Check state lost if the name is set (#11217)\n\t// Support: Windows Web Apps (WWA)\n\t// `name` and `type` must use .setAttribute for WWA (#14901)\n\tinput.setAttribute( \"type\", \"radio\" );\n\tinput.setAttribute( \"checked\", \"checked\" );\n\tinput.setAttribute( \"name\", \"t\" );\n\n\tdiv.appendChild( input );\n\n\t// Support: Android <=4.1 only\n\t// Older WebKit doesn't clone checked state correctly in fragments\n\tsupport.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;\n\n\t// Support: IE <=11 only\n\t// Make sure textarea (and checkbox) defaultValue is properly cloned\n\tdiv.innerHTML = \"<textarea>x</textarea>\";\n\tsupport.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;\n} )();\n\n\nvar\n\trkeyEvent = /^key/,\n\trmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,\n\trtypenamespace = /^([^.]*)(?:\\.(.+)|)/;\n\nfunction returnTrue() {\n\treturn true;\n}\n\nfunction returnFalse() {\n\treturn false;\n}\n\n// Support: IE <=9 - 11+\n// focus() and blur() are asynchronous, except when they are no-op.\n// So expect focus to be synchronous when the element is already active,\n// and blur to be synchronous when the element is not already active.\n// (focus and blur are always synchronous in other supported browsers,\n// this just defines when we can count on it).\nfunction expectSync( elem, type ) {\n\treturn ( elem === safeActiveElement() ) === ( type === \"focus\" );\n}\n\n// Support: IE <=9 only\n// Accessing document.activeElement can throw unexpectedly\n// https://bugs.jquery.com/ticket/13393\nfunction safeActiveElement() {\n\ttry {\n\t\treturn document.activeElement;\n\t} catch ( err ) { }\n}\n\nfunction on( elem, types, selector, data, fn, one ) {\n\tvar origFn, type;\n\n\t// Types can be a map of types/handlers\n\tif ( typeof types === \"object\" ) {\n\n\t\t// ( types-Object, selector, data )\n\t\tif ( typeof selector !== \"string\" ) {\n\n\t\t\t// ( types-Object, data )\n\t\t\tdata = data || selector;\n\t\t\tselector = undefined;\n\t\t}\n\t\tfor ( type in types ) {\n\t\t\ton( elem, type, selector, data, types[ type ], one );\n\t\t}\n\t\treturn elem;\n\t}\n\n\tif ( data == null && fn == null ) {\n\n\t\t// ( types, fn )\n\t\tfn = selector;\n\t\tdata = selector = undefined;\n\t} else if ( fn == null ) {\n\t\tif ( typeof selector === \"string\" ) {\n\n\t\t\t// ( types, selector, fn )\n\t\t\tfn = data;\n\t\t\tdata = undefined;\n\t\t} else {\n\n\t\t\t// ( types, data, fn )\n\t\t\tfn = data;\n\t\t\tdata = selector;\n\t\t\tselector = undefined;\n\t\t}\n\t}\n\tif ( fn === false ) {\n\t\tfn = returnFalse;\n\t} else if ( !fn ) {\n\t\treturn elem;\n\t}\n\n\tif ( one === 1 ) {\n\t\torigFn = fn;\n\t\tfn = function( event ) {\n\n\t\t\t// Can use an empty set, since event contains the info\n\t\t\tjQuery().off( event );\n\t\t\treturn origFn.apply( this, arguments );\n\t\t};\n\n\t\t// Use same guid so caller can remove using origFn\n\t\tfn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );\n\t}\n\treturn elem.each( function() {\n\t\tjQuery.event.add( this, types, fn, data, selector );\n\t} );\n}\n\n/*\n * Helper functions for managing events -- not part of the public interface.\n * Props to Dean Edwards' addEvent library for many of the ideas.\n */\njQuery.event = {\n\n\tglobal: {},\n\n\tadd: function( elem, types, handler, data, selector ) {\n\n\t\tvar handleObjIn, eventHandle, tmp,\n\t\t\tevents, t, handleObj,\n\t\t\tspecial, handlers, type, namespaces, origType,\n\t\t\telemData = dataPriv.get( elem );\n\n\t\t// Don't attach events to noData or text/comment nodes (but allow plain objects)\n\t\tif ( !elemData ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Caller can pass in an object of custom data in lieu of the handler\n\t\tif ( handler.handler ) {\n\t\t\thandleObjIn = handler;\n\t\t\thandler = handleObjIn.handler;\n\t\t\tselector = handleObjIn.selector;\n\t\t}\n\n\t\t// Ensure that invalid selectors throw exceptions at attach time\n\t\t// Evaluate against documentElement in case elem is a non-element node (e.g., document)\n\t\tif ( selector ) {\n\t\t\tjQuery.find.matchesSelector( documentElement, selector );\n\t\t}\n\n\t\t// Make sure that the handler has a unique ID, used to find/remove it later\n\t\tif ( !handler.guid ) {\n\t\t\thandler.guid = jQuery.guid++;\n\t\t}\n\n\t\t// Init the element's event structure and main handler, if this is the first\n\t\tif ( !( events = elemData.events ) ) {\n\t\t\tevents = elemData.events = {};\n\t\t}\n\t\tif ( !( eventHandle = elemData.handle ) ) {\n\t\t\teventHandle = elemData.handle = function( e ) {\n\n\t\t\t\t// Discard the second event of a jQuery.event.trigger() and\n\t\t\t\t// when an event is called after a page has unloaded\n\t\t\t\treturn typeof jQuery !== \"undefined\" && jQuery.event.triggered !== e.type ?\n\t\t\t\t\tjQuery.event.dispatch.apply( elem, arguments ) : undefined;\n\t\t\t};\n\t\t}\n\n\t\t// Handle multiple events separated by a space\n\t\ttypes = ( types || \"\" ).match( rnothtmlwhite ) || [ \"\" ];\n\t\tt = types.length;\n\t\twhile ( t-- ) {\n\t\t\ttmp = rtypenamespace.exec( types[ t ] ) || [];\n\t\t\ttype = origType = tmp[ 1 ];\n\t\t\tnamespaces = ( tmp[ 2 ] || \"\" ).split( \".\" ).sort();\n\n\t\t\t// There *must* be a type, no attaching namespace-only handlers\n\t\t\tif ( !type ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If event changes its type, use the special event handlers for the changed type\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\n\t\t\t// If selector defined, determine special event api type, otherwise given type\n\t\t\ttype = ( selector ? special.delegateType : special.bindType ) || type;\n\n\t\t\t// Update special based on newly reset type\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\n\t\t\t// handleObj is passed to all event handlers\n\t\t\thandleObj = jQuery.extend( {\n\t\t\t\ttype: type,\n\t\t\t\torigType: origType,\n\t\t\t\tdata: data,\n\t\t\t\thandler: handler,\n\t\t\t\tguid: handler.guid,\n\t\t\t\tselector: selector,\n\t\t\t\tneedsContext: selector && jQuery.expr.match.needsContext.test( selector ),\n\t\t\t\tnamespace: namespaces.join( \".\" )\n\t\t\t}, handleObjIn );\n\n\t\t\t// Init the event handler queue if we're the first\n\t\t\tif ( !( handlers = events[ type ] ) ) {\n\t\t\t\thandlers = events[ type ] = [];\n\t\t\t\thandlers.delegateCount = 0;\n\n\t\t\t\t// Only use addEventListener if the special events handler returns false\n\t\t\t\tif ( !special.setup ||\n\t\t\t\t\tspecial.setup.call( elem, data, namespaces, eventHandle ) === false ) {\n\n\t\t\t\t\tif ( elem.addEventListener ) {\n\t\t\t\t\t\telem.addEventListener( type, eventHandle );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( special.add ) {\n\t\t\t\tspecial.add.call( elem, handleObj );\n\n\t\t\t\tif ( !handleObj.handler.guid ) {\n\t\t\t\t\thandleObj.handler.guid = handler.guid;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add to the element's handler list, delegates in front\n\t\t\tif ( selector ) {\n\t\t\t\thandlers.splice( handlers.delegateCount++, 0, handleObj );\n\t\t\t} else {\n\t\t\t\thandlers.push( handleObj );\n\t\t\t}\n\n\t\t\t// Keep track of which events have ever been used, for event optimization\n\t\t\tjQuery.event.global[ type ] = true;\n\t\t}\n\n\t},\n\n\t// Detach an event or set of events from an element\n\tremove: function( elem, types, handler, selector, mappedTypes ) {\n\n\t\tvar j, origCount, tmp,\n\t\t\tevents, t, handleObj,\n\t\t\tspecial, handlers, type, namespaces, origType,\n\t\t\telemData = dataPriv.hasData( elem ) && dataPriv.get( elem );\n\n\t\tif ( !elemData || !( events = elemData.events ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Once for each type.namespace in types; type may be omitted\n\t\ttypes = ( types || \"\" ).match( rnothtmlwhite ) || [ \"\" ];\n\t\tt = types.length;\n\t\twhile ( t-- ) {\n\t\t\ttmp = rtypenamespace.exec( types[ t ] ) || [];\n\t\t\ttype = origType = tmp[ 1 ];\n\t\t\tnamespaces = ( tmp[ 2 ] || \"\" ).split( \".\" ).sort();\n\n\t\t\t// Unbind all events (on this namespace, if provided) for the element\n\t\t\tif ( !type ) {\n\t\t\t\tfor ( type in events ) {\n\t\t\t\t\tjQuery.event.remove( elem, type + types[ t ], handler, selector, true );\n\t\t\t\t}\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\t\t\ttype = ( selector ? special.delegateType : special.bindType ) || type;\n\t\t\thandlers = events[ type ] || [];\n\t\t\ttmp = tmp[ 2 ] &&\n\t\t\t\tnew RegExp( \"(^|\\\\.)\" + namespaces.join( \"\\\\.(?:.*\\\\.|)\" ) + \"(\\\\.|$)\" );\n\n\t\t\t// Remove matching events\n\t\t\torigCount = j = handlers.length;\n\t\t\twhile ( j-- ) {\n\t\t\t\thandleObj = handlers[ j ];\n\n\t\t\t\tif ( ( mappedTypes || origType === handleObj.origType ) &&\n\t\t\t\t\t( !handler || handler.guid === handleObj.guid ) &&\n\t\t\t\t\t( !tmp || tmp.test( handleObj.namespace ) ) &&\n\t\t\t\t\t( !selector || selector === handleObj.selector ||\n\t\t\t\t\t\tselector === \"**\" && handleObj.selector ) ) {\n\t\t\t\t\thandlers.splice( j, 1 );\n\n\t\t\t\t\tif ( handleObj.selector ) {\n\t\t\t\t\t\thandlers.delegateCount--;\n\t\t\t\t\t}\n\t\t\t\t\tif ( special.remove ) {\n\t\t\t\t\t\tspecial.remove.call( elem, handleObj );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Remove generic event handler if we removed something and no more handlers exist\n\t\t\t// (avoids potential for endless recursion during removal of special event handlers)\n\t\t\tif ( origCount && !handlers.length ) {\n\t\t\t\tif ( !special.teardown ||\n\t\t\t\t\tspecial.teardown.call( elem, namespaces, elemData.handle ) === false ) {\n\n\t\t\t\t\tjQuery.removeEvent( elem, type, elemData.handle );\n\t\t\t\t}\n\n\t\t\t\tdelete events[ type ];\n\t\t\t}\n\t\t}\n\n\t\t// Remove data and the expando if it's no longer used\n\t\tif ( jQuery.isEmptyObject( events ) ) {\n\t\t\tdataPriv.remove( elem, \"handle events\" );\n\t\t}\n\t},\n\n\tdispatch: function( nativeEvent ) {\n\n\t\t// Make a writable jQuery.Event from the native event object\n\t\tvar event = jQuery.event.fix( nativeEvent );\n\n\t\tvar i, j, ret, matched, handleObj, handlerQueue,\n\t\t\targs = new Array( arguments.length ),\n\t\t\thandlers = ( dataPriv.get( this, \"events\" ) || {} )[ event.type ] || [],\n\t\t\tspecial = jQuery.event.special[ event.type ] || {};\n\n\t\t// Use the fix-ed jQuery.Event rather than the (read-only) native event\n\t\targs[ 0 ] = event;\n\n\t\tfor ( i = 1; i < arguments.length; i++ ) {\n\t\t\targs[ i ] = arguments[ i ];\n\t\t}\n\n\t\tevent.delegateTarget = this;\n\n\t\t// Call the preDispatch hook for the mapped type, and let it bail if desired\n\t\tif ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Determine handlers\n\t\thandlerQueue = jQuery.event.handlers.call( this, event, handlers );\n\n\t\t// Run delegates first; they may want to stop propagation beneath us\n\t\ti = 0;\n\t\twhile ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {\n\t\t\tevent.currentTarget = matched.elem;\n\n\t\t\tj = 0;\n\t\t\twhile ( ( handleObj = matched.handlers[ j++ ] ) &&\n\t\t\t\t!event.isImmediatePropagationStopped() ) {\n\n\t\t\t\t// If the event is namespaced, then each handler is only invoked if it is\n\t\t\t\t// specially universal or its namespaces are a superset of the event's.\n\t\t\t\tif ( !event.rnamespace || handleObj.namespace === false ||\n\t\t\t\t\tevent.rnamespace.test( handleObj.namespace ) ) {\n\n\t\t\t\t\tevent.handleObj = handleObj;\n\t\t\t\t\tevent.data = handleObj.data;\n\n\t\t\t\t\tret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||\n\t\t\t\t\t\thandleObj.handler ).apply( matched.elem, args );\n\n\t\t\t\t\tif ( ret !== undefined ) {\n\t\t\t\t\t\tif ( ( event.result = ret ) === false ) {\n\t\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\t\tevent.stopPropagation();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Call the postDispatch hook for the mapped type\n\t\tif ( special.postDispatch ) {\n\t\t\tspecial.postDispatch.call( this, event );\n\t\t}\n\n\t\treturn event.result;\n\t},\n\n\thandlers: function( event, handlers ) {\n\t\tvar i, handleObj, sel, matchedHandlers, matchedSelectors,\n\t\t\thandlerQueue = [],\n\t\t\tdelegateCount = handlers.delegateCount,\n\t\t\tcur = event.target;\n\n\t\t// Find delegate handlers\n\t\tif ( delegateCount &&\n\n\t\t\t// Support: IE <=9\n\t\t\t// Black-hole SVG <use> instance trees (trac-13180)\n\t\t\tcur.nodeType &&\n\n\t\t\t// Support: Firefox <=42\n\t\t\t// Suppress spec-violating clicks indicating a non-primary pointer button (trac-3861)\n\t\t\t// https://www.w3.org/TR/DOM-Level-3-Events/#event-type-click\n\t\t\t// Support: IE 11 only\n\t\t\t// ...but not arrow key \"clicks\" of radio inputs, which can have `button` -1 (gh-2343)\n\t\t\t!( event.type === \"click\" && event.button >= 1 ) ) {\n\n\t\t\tfor ( ; cur !== this; cur = cur.parentNode || this ) {\n\n\t\t\t\t// Don't check non-elements (#13208)\n\t\t\t\t// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)\n\t\t\t\tif ( cur.nodeType === 1 && !( event.type === \"click\" && cur.disabled === true ) ) {\n\t\t\t\t\tmatchedHandlers = [];\n\t\t\t\t\tmatchedSelectors = {};\n\t\t\t\t\tfor ( i = 0; i < delegateCount; i++ ) {\n\t\t\t\t\t\thandleObj = handlers[ i ];\n\n\t\t\t\t\t\t// Don't conflict with Object.prototype properties (#13203)\n\t\t\t\t\t\tsel = handleObj.selector + \" \";\n\n\t\t\t\t\t\tif ( matchedSelectors[ sel ] === undefined ) {\n\t\t\t\t\t\t\tmatchedSelectors[ sel ] = handleObj.needsContext ?\n\t\t\t\t\t\t\t\tjQuery( sel, this ).index( cur ) > -1 :\n\t\t\t\t\t\t\t\tjQuery.find( sel, this, null, [ cur ] ).length;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif ( matchedSelectors[ sel ] ) {\n\t\t\t\t\t\t\tmatchedHandlers.push( handleObj );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif ( matchedHandlers.length ) {\n\t\t\t\t\t\thandlerQueue.push( { elem: cur, handlers: matchedHandlers } );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Add the remaining (directly-bound) handlers\n\t\tcur = this;\n\t\tif ( delegateCount < handlers.length ) {\n\t\t\thandlerQueue.push( { elem: cur, handlers: handlers.slice( delegateCount ) } );\n\t\t}\n\n\t\treturn handlerQueue;\n\t},\n\n\taddProp: function( name, hook ) {\n\t\tObject.defineProperty( jQuery.Event.prototype, name, {\n\t\t\tenumerable: true,\n\t\t\tconfigurable: true,\n\n\t\t\tget: isFunction( hook ) ?\n\t\t\t\tfunction() {\n\t\t\t\t\tif ( this.originalEvent ) {\n\t\t\t\t\t\t\treturn hook( this.originalEvent );\n\t\t\t\t\t}\n\t\t\t\t} :\n\t\t\t\tfunction() {\n\t\t\t\t\tif ( this.originalEvent ) {\n\t\t\t\t\t\t\treturn this.originalEvent[ name ];\n\t\t\t\t\t}\n\t\t\t\t},\n\n\t\t\tset: function( value ) {\n\t\t\t\tObject.defineProperty( this, name, {\n\t\t\t\t\tenumerable: true,\n\t\t\t\t\tconfigurable: true,\n\t\t\t\t\twritable: true,\n\t\t\t\t\tvalue: value\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t},\n\n\tfix: function( originalEvent ) {\n\t\treturn originalEvent[ jQuery.expando ] ?\n\t\t\toriginalEvent :\n\t\t\tnew jQuery.Event( originalEvent );\n\t},\n\n\tspecial: {\n\t\tload: {\n\n\t\t\t// Prevent triggered image.load events from bubbling to window.load\n\t\t\tnoBubble: true\n\t\t},\n\t\tclick: {\n\n\t\t\t// Utilize native event to ensure correct state for checkable inputs\n\t\t\tsetup: function( data ) {\n\n\t\t\t\t// For mutual compressibility with _default, replace `this` access with a local var.\n\t\t\t\t// `|| data` is dead code meant only to preserve the variable through minification.\n\t\t\t\tvar el = this || data;\n\n\t\t\t\t// Claim the first handler\n\t\t\t\tif ( rcheckableType.test( el.type ) &&\n\t\t\t\t\tel.click && nodeName( el, \"input\" ) ) {\n\n\t\t\t\t\t// dataPriv.set( el, \"click\", ... )\n\t\t\t\t\tleverageNative( el, \"click\", returnTrue );\n\t\t\t\t}\n\n\t\t\t\t// Return false to allow normal processing in the caller\n\t\t\t\treturn false;\n\t\t\t},\n\t\t\ttrigger: function( data ) {\n\n\t\t\t\t// For mutual compressibility with _default, replace `this` access with a local var.\n\t\t\t\t// `|| data` is dead code meant only to preserve the variable through minification.\n\t\t\t\tvar el = this || data;\n\n\t\t\t\t// Force setup before triggering a click\n\t\t\t\tif ( rcheckableType.test( el.type ) &&\n\t\t\t\t\tel.click && nodeName( el, \"input\" ) ) {\n\n\t\t\t\t\tleverageNative( el, \"click\" );\n\t\t\t\t}\n\n\t\t\t\t// Return non-false to allow normal event-path propagation\n\t\t\t\treturn true;\n\t\t\t},\n\n\t\t\t// For cross-browser consistency, suppress native .click() on links\n\t\t\t// Also prevent it if we're currently inside a leveraged native-event stack\n\t\t\t_default: function( event ) {\n\t\t\t\tvar target = event.target;\n\t\t\t\treturn rcheckableType.test( target.type ) &&\n\t\t\t\t\ttarget.click && nodeName( target, \"input\" ) &&\n\t\t\t\t\tdataPriv.get( target, \"click\" ) ||\n\t\t\t\t\tnodeName( target, \"a\" );\n\t\t\t}\n\t\t},\n\n\t\tbeforeunload: {\n\t\t\tpostDispatch: function( event ) {\n\n\t\t\t\t// Support: Firefox 20+\n\t\t\t\t// Firefox doesn't alert if the returnValue field is not set.\n\t\t\t\tif ( event.result !== undefined && event.originalEvent ) {\n\t\t\t\t\tevent.originalEvent.returnValue = event.result;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n};\n\n// Ensure the presence of an event listener that handles manually-triggered\n// synthetic events by interrupting progress until reinvoked in response to\n// *native* events that it fires directly, ensuring that state changes have\n// already occurred before other listeners are invoked.\nfunction leverageNative( el, type, expectSync ) {\n\n\t// Missing expectSync indicates a trigger call, which must force setup through jQuery.event.add\n\tif ( !expectSync ) {\n\t\tif ( dataPriv.get( el, type ) === undefined ) {\n\t\t\tjQuery.event.add( el, type, returnTrue );\n\t\t}\n\t\treturn;\n\t}\n\n\t// Register the controller as a special universal handler for all event namespaces\n\tdataPriv.set( el, type, false );\n\tjQuery.event.add( el, type, {\n\t\tnamespace: false,\n\t\thandler: function( event ) {\n\t\t\tvar notAsync, result,\n\t\t\t\tsaved = dataPriv.get( this, type );\n\n\t\t\tif ( ( event.isTrigger & 1 ) && this[ type ] ) {\n\n\t\t\t\t// Interrupt processing of the outer synthetic .trigger()ed event\n\t\t\t\t// Saved data should be false in such cases, but might be a leftover capture object\n\t\t\t\t// from an async native handler (gh-4350)\n\t\t\t\tif ( !saved.length ) {\n\n\t\t\t\t\t// Store arguments for use when handling the inner native event\n\t\t\t\t\t// There will always be at least one argument (an event object), so this array\n\t\t\t\t\t// will not be confused with a leftover capture object.\n\t\t\t\t\tsaved = slice.call( arguments );\n\t\t\t\t\tdataPriv.set( this, type, saved );\n\n\t\t\t\t\t// Trigger the native event and capture its result\n\t\t\t\t\t// Support: IE <=9 - 11+\n\t\t\t\t\t// focus() and blur() are asynchronous\n\t\t\t\t\tnotAsync = expectSync( this, type );\n\t\t\t\t\tthis[ type ]();\n\t\t\t\t\tresult = dataPriv.get( this, type );\n\t\t\t\t\tif ( saved !== result || notAsync ) {\n\t\t\t\t\t\tdataPriv.set( this, type, false );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tresult = {};\n\t\t\t\t\t}\n\t\t\t\t\tif ( saved !== result ) {\n\n\t\t\t\t\t\t// Cancel the outer synthetic event\n\t\t\t\t\t\tevent.stopImmediatePropagation();\n\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\treturn result.value;\n\t\t\t\t\t}\n\n\t\t\t\t// If this is an inner synthetic event for an event with a bubbling surrogate\n\t\t\t\t// (focus or blur), assume that the surrogate already propagated from triggering the\n\t\t\t\t// native event and prevent that from happening again here.\n\t\t\t\t// This technically gets the ordering wrong w.r.t. to `.trigger()` (in which the\n\t\t\t\t// bubbling surrogate propagates *after* the non-bubbling base), but that seems\n\t\t\t\t// less bad than duplication.\n\t\t\t\t} else if ( ( jQuery.event.special[ type ] || {} ).delegateType ) {\n\t\t\t\t\tevent.stopPropagation();\n\t\t\t\t}\n\n\t\t\t// If this is a native event triggered above, everything is now in order\n\t\t\t// Fire an inner synthetic event with the original arguments\n\t\t\t} else if ( saved.length ) {\n\n\t\t\t\t// ...and capture the result\n\t\t\t\tdataPriv.set( this, type, {\n\t\t\t\t\tvalue: jQuery.event.trigger(\n\n\t\t\t\t\t\t// Support: IE <=9 - 11+\n\t\t\t\t\t\t// Extend with the prototype to reset the above stopImmediatePropagation()\n\t\t\t\t\t\tjQuery.extend( saved[ 0 ], jQuery.Event.prototype ),\n\t\t\t\t\t\tsaved.slice( 1 ),\n\t\t\t\t\t\tthis\n\t\t\t\t\t)\n\t\t\t\t} );\n\n\t\t\t\t// Abort handling of the native event\n\t\t\t\tevent.stopImmediatePropagation();\n\t\t\t}\n\t\t}\n\t} );\n}\n\njQuery.removeEvent = function( elem, type, handle ) {\n\n\t// This \"if\" is needed for plain objects\n\tif ( elem.removeEventListener ) {\n\t\telem.removeEventListener( type, handle );\n\t}\n};\n\njQuery.Event = function( src, props ) {\n\n\t// Allow instantiation without the 'new' keyword\n\tif ( !( this instanceof jQuery.Event ) ) {\n\t\treturn new jQuery.Event( src, props );\n\t}\n\n\t// Event object\n\tif ( src && src.type ) {\n\t\tthis.originalEvent = src;\n\t\tthis.type = src.type;\n\n\t\t// Events bubbling up the document may have been marked as prevented\n\t\t// by a handler lower down the tree; reflect the correct value.\n\t\tthis.isDefaultPrevented = src.defaultPrevented ||\n\t\t\t\tsrc.defaultPrevented === undefined &&\n\n\t\t\t\t// Support: Android <=2.3 only\n\t\t\t\tsrc.returnValue === false ?\n\t\t\treturnTrue :\n\t\t\treturnFalse;\n\n\t\t// Create target properties\n\t\t// Support: Safari <=6 - 7 only\n\t\t// Target should not be a text node (#504, #13143)\n\t\tthis.target = ( src.target && src.target.nodeType === 3 ) ?\n\t\t\tsrc.target.parentNode :\n\t\t\tsrc.target;\n\n\t\tthis.currentTarget = src.currentTarget;\n\t\tthis.relatedTarget = src.relatedTarget;\n\n\t// Event type\n\t} else {\n\t\tthis.type = src;\n\t}\n\n\t// Put explicitly provided properties onto the event object\n\tif ( props ) {\n\t\tjQuery.extend( this, props );\n\t}\n\n\t// Create a timestamp if incoming event doesn't have one\n\tthis.timeStamp = src && src.timeStamp || Date.now();\n\n\t// Mark it as fixed\n\tthis[ jQuery.expando ] = true;\n};\n\n// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding\n// https://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html\njQuery.Event.prototype = {\n\tconstructor: jQuery.Event,\n\tisDefaultPrevented: returnFalse,\n\tisPropagationStopped: returnFalse,\n\tisImmediatePropagationStopped: returnFalse,\n\tisSimulated: false,\n\n\tpreventDefault: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isDefaultPrevented = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.preventDefault();\n\t\t}\n\t},\n\tstopPropagation: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isPropagationStopped = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.stopPropagation();\n\t\t}\n\t},\n\tstopImmediatePropagation: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isImmediatePropagationStopped = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.stopImmediatePropagation();\n\t\t}\n\n\t\tthis.stopPropagation();\n\t}\n};\n\n// Includes all common event props including KeyEvent and MouseEvent specific props\njQuery.each( {\n\taltKey: true,\n\tbubbles: true,\n\tcancelable: true,\n\tchangedTouches: true,\n\tctrlKey: true,\n\tdetail: true,\n\teventPhase: true,\n\tmetaKey: true,\n\tpageX: true,\n\tpageY: true,\n\tshiftKey: true,\n\tview: true,\n\t\"char\": true,\n\tcode: true,\n\tcharCode: true,\n\tkey: true,\n\tkeyCode: true,\n\tbutton: true,\n\tbuttons: true,\n\tclientX: true,\n\tclientY: true,\n\toffsetX: true,\n\toffsetY: true,\n\tpointerId: true,\n\tpointerType: true,\n\tscreenX: true,\n\tscreenY: true,\n\ttargetTouches: true,\n\ttoElement: true,\n\ttouches: true,\n\n\twhich: function( event ) {\n\t\tvar button = event.button;\n\n\t\t// Add which for key events\n\t\tif ( event.which == null && rkeyEvent.test( event.type ) ) {\n\t\t\treturn event.charCode != null ? event.charCode : event.keyCode;\n\t\t}\n\n\t\t// Add which for click: 1 === left; 2 === middle; 3 === right\n\t\tif ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {\n\t\t\tif ( button & 1 ) {\n\t\t\t\treturn 1;\n\t\t\t}\n\n\t\t\tif ( button & 2 ) {\n\t\t\t\treturn 3;\n\t\t\t}\n\n\t\t\tif ( button & 4 ) {\n\t\t\t\treturn 2;\n\t\t\t}\n\n\t\t\treturn 0;\n\t\t}\n\n\t\treturn event.which;\n\t}\n}, jQuery.event.addProp );\n\njQuery.each( { focus: \"focusin\", blur: \"focusout\" }, function( type, delegateType ) {\n\tjQuery.event.special[ type ] = {\n\n\t\t// Utilize native event if possible so blur/focus sequence is correct\n\t\tsetup: function() {\n\n\t\t\t// Claim the first handler\n\t\t\t// dataPriv.set( this, \"focus\", ... )\n\t\t\t// dataPriv.set( this, \"blur\", ... )\n\t\t\tleverageNative( this, type, expectSync );\n\n\t\t\t// Return false to allow normal processing in the caller\n\t\t\treturn false;\n\t\t},\n\t\ttrigger: function() {\n\n\t\t\t// Force setup before trigger\n\t\t\tleverageNative( this, type );\n\n\t\t\t// Return non-false to allow normal event-path propagation\n\t\t\treturn true;\n\t\t},\n\n\t\tdelegateType: delegateType\n\t};\n} );\n\n// Create mouseenter/leave events using mouseover/out and event-time checks\n// so that event delegation works in jQuery.\n// Do the same for pointerenter/pointerleave and pointerover/pointerout\n//\n// Support: Safari 7 only\n// Safari sends mouseenter too often; see:\n// https://bugs.chromium.org/p/chromium/issues/detail?id=470258\n// for the description of the bug (it existed in older Chrome versions as well).\njQuery.each( {\n\tmouseenter: \"mouseover\",\n\tmouseleave: \"mouseout\",\n\tpointerenter: \"pointerover\",\n\tpointerleave: \"pointerout\"\n}, function( orig, fix ) {\n\tjQuery.event.special[ orig ] = {\n\t\tdelegateType: fix,\n\t\tbindType: fix,\n\n\t\thandle: function( event ) {\n\t\t\tvar ret,\n\t\t\t\ttarget = this,\n\t\t\t\trelated = event.relatedTarget,\n\t\t\t\thandleObj = event.handleObj;\n\n\t\t\t// For mouseenter/leave call the handler if related is outside the target.\n\t\t\t// NB: No relatedTarget if the mouse left/entered the browser window\n\t\t\tif ( !related || ( related !== target && !jQuery.contains( target, related ) ) ) {\n\t\t\t\tevent.type = handleObj.origType;\n\t\t\t\tret = handleObj.handler.apply( this, arguments );\n\t\t\t\tevent.type = fix;\n\t\t\t}\n\t\t\treturn ret;\n\t\t}\n\t};\n} );\n\njQuery.fn.extend( {\n\n\ton: function( types, selector, data, fn ) {\n\t\treturn on( this, types, selector, data, fn );\n\t},\n\tone: function( types, selector, data, fn ) {\n\t\treturn on( this, types, selector, data, fn, 1 );\n\t},\n\toff: function( types, selector, fn ) {\n\t\tvar handleObj, type;\n\t\tif ( types && types.preventDefault && types.handleObj ) {\n\n\t\t\t// ( event ) dispatched jQuery.Event\n\t\t\thandleObj = types.handleObj;\n\t\t\tjQuery( types.delegateTarget ).off(\n\t\t\t\thandleObj.namespace ?\n\t\t\t\t\thandleObj.origType + \".\" + handleObj.namespace :\n\t\t\t\t\thandleObj.origType,\n\t\t\t\thandleObj.selector,\n\t\t\t\thandleObj.handler\n\t\t\t);\n\t\t\treturn this;\n\t\t}\n\t\tif ( typeof types === \"object\" ) {\n\n\t\t\t// ( types-object [, selector] )\n\t\t\tfor ( type in types ) {\n\t\t\t\tthis.off( type, selector, types[ type ] );\n\t\t\t}\n\t\t\treturn this;\n\t\t}\n\t\tif ( selector === false || typeof selector === \"function\" ) {\n\n\t\t\t// ( types [, fn] )\n\t\t\tfn = selector;\n\t\t\tselector = undefined;\n\t\t}\n\t\tif ( fn === false ) {\n\t\t\tfn = returnFalse;\n\t\t}\n\t\treturn this.each( function() {\n\t\t\tjQuery.event.remove( this, types, fn, selector );\n\t\t} );\n\t}\n} );\n\n\nvar\n\n\t/* eslint-disable max-len */\n\n\t// See https://github.com/eslint/eslint/issues/3229\n\trxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\\/\\0>\\x20\\t\\r\\n\\f]*)[^>]*)\\/>/gi,\n\n\t/* eslint-enable */\n\n\t// Support: IE <=10 - 11, Edge 12 - 13 only\n\t// In IE/Edge using regex groups here causes severe slowdowns.\n\t// See https://connect.microsoft.com/IE/feedback/details/1736512/\n\trnoInnerhtml = /<script|<style|<link/i,\n\n\t// checked=\"checked\" or checked\n\trchecked = /checked\\s*(?:[^=]|=\\s*.checked.)/i,\n\trcleanScript = /^\\s*<!(?:\\[CDATA\\[|--)|(?:\\]\\]|--)>\\s*$/g;\n\n// Prefer a tbody over its parent table for containing new rows\nfunction manipulationTarget( elem, content ) {\n\tif ( nodeName( elem, \"table\" ) &&\n\t\tnodeName( content.nodeType !== 11 ? content : content.firstChild, \"tr\" ) ) {\n\n\t\treturn jQuery( elem ).children( \"tbody\" )[ 0 ] || elem;\n\t}\n\n\treturn elem;\n}\n\n// Replace/restore the type attribute of script elements for safe DOM manipulation\nfunction disableScript( elem ) {\n\telem.type = ( elem.getAttribute( \"type\" ) !== null ) + \"/\" + elem.type;\n\treturn elem;\n}\nfunction restoreScript( elem ) {\n\tif ( ( elem.type || \"\" ).slice( 0, 5 ) === \"true/\" ) {\n\t\telem.type = elem.type.slice( 5 );\n\t} else {\n\t\telem.removeAttribute( \"type\" );\n\t}\n\n\treturn elem;\n}\n\nfunction cloneCopyEvent( src, dest ) {\n\tvar i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;\n\n\tif ( dest.nodeType !== 1 ) {\n\t\treturn;\n\t}\n\n\t// 1. Copy private data: events, handlers, etc.\n\tif ( dataPriv.hasData( src ) ) {\n\t\tpdataOld = dataPriv.access( src );\n\t\tpdataCur = dataPriv.set( dest, pdataOld );\n\t\tevents = pdataOld.events;\n\n\t\tif ( events ) {\n\t\t\tdelete pdataCur.handle;\n\t\t\tpdataCur.events = {};\n\n\t\t\tfor ( type in events ) {\n\t\t\t\tfor ( i = 0, l = events[ type ].length; i < l; i++ ) {\n\t\t\t\t\tjQuery.event.add( dest, type, events[ type ][ i ] );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// 2. Copy user data\n\tif ( dataUser.hasData( src ) ) {\n\t\tudataOld = dataUser.access( src );\n\t\tudataCur = jQuery.extend( {}, udataOld );\n\n\t\tdataUser.set( dest, udataCur );\n\t}\n}\n\n// Fix IE bugs, see support tests\nfunction fixInput( src, dest ) {\n\tvar nodeName = dest.nodeName.toLowerCase();\n\n\t// Fails to persist the checked state of a cloned checkbox or radio button.\n\tif ( nodeName === \"input\" && rcheckableType.test( src.type ) ) {\n\t\tdest.checked = src.checked;\n\n\t// Fails to return the selected option to the default selected state when cloning options\n\t} else if ( nodeName === \"input\" || nodeName === \"textarea\" ) {\n\t\tdest.defaultValue = src.defaultValue;\n\t}\n}\n\nfunction domManip( collection, args, callback, ignored ) {\n\n\t// Flatten any nested arrays\n\targs = concat.apply( [], args );\n\n\tvar fragment, first, scripts, hasScripts, node, doc,\n\t\ti = 0,\n\t\tl = collection.length,\n\t\tiNoClone = l - 1,\n\t\tvalue = args[ 0 ],\n\t\tvalueIsFunction = isFunction( value );\n\n\t// We can't cloneNode fragments that contain checked, in WebKit\n\tif ( valueIsFunction ||\n\t\t\t( l > 1 && typeof value === \"string\" &&\n\t\t\t\t!support.checkClone && rchecked.test( value ) ) ) {\n\t\treturn collection.each( function( index ) {\n\t\t\tvar self = collection.eq( index );\n\t\t\tif ( valueIsFunction ) {\n\t\t\t\targs[ 0 ] = value.call( this, index, self.html() );\n\t\t\t}\n\t\t\tdomManip( self, args, callback, ignored );\n\t\t} );\n\t}\n\n\tif ( l ) {\n\t\tfragment = buildFragment( args, collection[ 0 ].ownerDocument, false, collection, ignored );\n\t\tfirst = fragment.firstChild;\n\n\t\tif ( fragment.childNodes.length === 1 ) {\n\t\t\tfragment = first;\n\t\t}\n\n\t\t// Require either new content or an interest in ignored elements to invoke the callback\n\t\tif ( first || ignored ) {\n\t\t\tscripts = jQuery.map( getAll( fragment, \"script\" ), disableScript );\n\t\t\thasScripts = scripts.length;\n\n\t\t\t// Use the original fragment for the last item\n\t\t\t// instead of the first because it can end up\n\t\t\t// being emptied incorrectly in certain situations (#8070).\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tnode = fragment;\n\n\t\t\t\tif ( i !== iNoClone ) {\n\t\t\t\t\tnode = jQuery.clone( node, true, true );\n\n\t\t\t\t\t// Keep references to cloned scripts for later restoration\n\t\t\t\t\tif ( hasScripts ) {\n\n\t\t\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\t\t\tjQuery.merge( scripts, getAll( node, \"script\" ) );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tcallback.call( collection[ i ], node, i );\n\t\t\t}\n\n\t\t\tif ( hasScripts ) {\n\t\t\t\tdoc = scripts[ scripts.length - 1 ].ownerDocument;\n\n\t\t\t\t// Reenable scripts\n\t\t\t\tjQuery.map( scripts, restoreScript );\n\n\t\t\t\t// Evaluate executable scripts on first document insertion\n\t\t\t\tfor ( i = 0; i < hasScripts; i++ ) {\n\t\t\t\t\tnode = scripts[ i ];\n\t\t\t\t\tif ( rscriptType.test( node.type || \"\" ) &&\n\t\t\t\t\t\t!dataPriv.access( node, \"globalEval\" ) &&\n\t\t\t\t\t\tjQuery.contains( doc, node ) ) {\n\n\t\t\t\t\t\tif ( node.src && ( node.type || \"\" ).toLowerCase() !== \"module\" ) {\n\n\t\t\t\t\t\t\t// Optional AJAX dependency, but won't run scripts if not present\n\t\t\t\t\t\t\tif ( jQuery._evalUrl && !node.noModule ) {\n\t\t\t\t\t\t\t\tjQuery._evalUrl( node.src, {\n\t\t\t\t\t\t\t\t\tnonce: node.nonce || node.getAttribute( \"nonce\" )\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tDOMEval( node.textContent.replace( rcleanScript, \"\" ), node, doc );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn collection;\n}\n\nfunction remove( elem, selector, keepData ) {\n\tvar node,\n\t\tnodes = selector ? jQuery.filter( selector, elem ) : elem,\n\t\ti = 0;\n\n\tfor ( ; ( node = nodes[ i ] ) != null; i++ ) {\n\t\tif ( !keepData && node.nodeType === 1 ) {\n\t\t\tjQuery.cleanData( getAll( node ) );\n\t\t}\n\n\t\tif ( node.parentNode ) {\n\t\t\tif ( keepData && isAttached( node ) ) {\n\t\t\t\tsetGlobalEval( getAll( node, \"script\" ) );\n\t\t\t}\n\t\t\tnode.parentNode.removeChild( node );\n\t\t}\n\t}\n\n\treturn elem;\n}\n\njQuery.extend( {\n\thtmlPrefilter: function( html ) {\n\t\treturn html.replace( rxhtmlTag, \"<$1></$2>\" );\n\t},\n\n\tclone: function( elem, dataAndEvents, deepDataAndEvents ) {\n\t\tvar i, l, srcElements, destElements,\n\t\t\tclone = elem.cloneNode( true ),\n\t\t\tinPage = isAttached( elem );\n\n\t\t// Fix IE cloning issues\n\t\tif ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&\n\t\t\t\t!jQuery.isXMLDoc( elem ) ) {\n\n\t\t\t// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2\n\t\t\tdestElements = getAll( clone );\n\t\t\tsrcElements = getAll( elem );\n\n\t\t\tfor ( i = 0, l = srcElements.length; i < l; i++ ) {\n\t\t\t\tfixInput( srcElements[ i ], destElements[ i ] );\n\t\t\t}\n\t\t}\n\n\t\t// Copy the events from the original to the clone\n\t\tif ( dataAndEvents ) {\n\t\t\tif ( deepDataAndEvents ) {\n\t\t\t\tsrcElements = srcElements || getAll( elem );\n\t\t\t\tdestElements = destElements || getAll( clone );\n\n\t\t\t\tfor ( i = 0, l = srcElements.length; i < l; i++ ) {\n\t\t\t\t\tcloneCopyEvent( srcElements[ i ], destElements[ i ] );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tcloneCopyEvent( elem, clone );\n\t\t\t}\n\t\t}\n\n\t\t// Preserve script evaluation history\n\t\tdestElements = getAll( clone, \"script\" );\n\t\tif ( destElements.length > 0 ) {\n\t\t\tsetGlobalEval( destElements, !inPage && getAll( elem, \"script\" ) );\n\t\t}\n\n\t\t// Return the cloned set\n\t\treturn clone;\n\t},\n\n\tcleanData: function( elems ) {\n\t\tvar data, elem, type,\n\t\t\tspecial = jQuery.event.special,\n\t\t\ti = 0;\n\n\t\tfor ( ; ( elem = elems[ i ] ) !== undefined; i++ ) {\n\t\t\tif ( acceptData( elem ) ) {\n\t\t\t\tif ( ( data = elem[ dataPriv.expando ] ) ) {\n\t\t\t\t\tif ( data.events ) {\n\t\t\t\t\t\tfor ( type in data.events ) {\n\t\t\t\t\t\t\tif ( special[ type ] ) {\n\t\t\t\t\t\t\t\tjQuery.event.remove( elem, type );\n\n\t\t\t\t\t\t\t// This is a shortcut to avoid jQuery.event.remove's overhead\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tjQuery.removeEvent( elem, type, data.handle );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support: Chrome <=35 - 45+\n\t\t\t\t\t// Assign undefined instead of using delete, see Data#remove\n\t\t\t\t\telem[ dataPriv.expando ] = undefined;\n\t\t\t\t}\n\t\t\t\tif ( elem[ dataUser.expando ] ) {\n\n\t\t\t\t\t// Support: Chrome <=35 - 45+\n\t\t\t\t\t// Assign undefined instead of using delete, see Data#remove\n\t\t\t\t\telem[ dataUser.expando ] = undefined;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n} );\n\njQuery.fn.extend( {\n\tdetach: function( selector ) {\n\t\treturn remove( this, selector, true );\n\t},\n\n\tremove: function( selector ) {\n\t\treturn remove( this, selector );\n\t},\n\n\ttext: function( value ) {\n\t\treturn access( this, function( value ) {\n\t\t\treturn value === undefined ?\n\t\t\t\tjQuery.text( this ) :\n\t\t\t\tthis.empty().each( function() {\n\t\t\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\t\t\tthis.textContent = value;\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t}, null, value, arguments.length );\n\t},\n\n\tappend: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\tvar target = manipulationTarget( this, elem );\n\t\t\t\ttarget.appendChild( elem );\n\t\t\t}\n\t\t} );\n\t},\n\n\tprepend: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\tvar target = manipulationTarget( this, elem );\n\t\t\t\ttarget.insertBefore( elem, target.firstChild );\n\t\t\t}\n\t\t} );\n\t},\n\n\tbefore: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.parentNode ) {\n\t\t\t\tthis.parentNode.insertBefore( elem, this );\n\t\t\t}\n\t\t} );\n\t},\n\n\tafter: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.parentNode ) {\n\t\t\t\tthis.parentNode.insertBefore( elem, this.nextSibling );\n\t\t\t}\n\t\t} );\n\t},\n\n\tempty: function() {\n\t\tvar elem,\n\t\t\ti = 0;\n\n\t\tfor ( ; ( elem = this[ i ] ) != null; i++ ) {\n\t\t\tif ( elem.nodeType === 1 ) {\n\n\t\t\t\t// Prevent memory leaks\n\t\t\t\tjQuery.cleanData( getAll( elem, false ) );\n\n\t\t\t\t// Remove any remaining nodes\n\t\t\t\telem.textContent = \"\";\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\tclone: function( dataAndEvents, deepDataAndEvents ) {\n\t\tdataAndEvents = dataAndEvents == null ? false : dataAndEvents;\n\t\tdeepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;\n\n\t\treturn this.map( function() {\n\t\t\treturn jQuery.clone( this, dataAndEvents, deepDataAndEvents );\n\t\t} );\n\t},\n\n\thtml: function( value ) {\n\t\treturn access( this, function( value ) {\n\t\t\tvar elem = this[ 0 ] || {},\n\t\t\t\ti = 0,\n\t\t\t\tl = this.length;\n\n\t\t\tif ( value === undefined && elem.nodeType === 1 ) {\n\t\t\t\treturn elem.innerHTML;\n\t\t\t}\n\n\t\t\t// See if we can take a shortcut and just use innerHTML\n\t\t\tif ( typeof value === \"string\" && !rnoInnerhtml.test( value ) &&\n\t\t\t\t!wrapMap[ ( rtagName.exec( value ) || [ \"\", \"\" ] )[ 1 ].toLowerCase() ] ) {\n\n\t\t\t\tvalue = jQuery.htmlPrefilter( value );\n\n\t\t\t\ttry {\n\t\t\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\t\t\telem = this[ i ] || {};\n\n\t\t\t\t\t\t// Remove element nodes and prevent memory leaks\n\t\t\t\t\t\tif ( elem.nodeType === 1 ) {\n\t\t\t\t\t\t\tjQuery.cleanData( getAll( elem, false ) );\n\t\t\t\t\t\t\telem.innerHTML = value;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\telem = 0;\n\n\t\t\t\t// If using innerHTML throws an exception, use the fallback method\n\t\t\t\t} catch ( e ) {}\n\t\t\t}\n\n\t\t\tif ( elem ) {\n\t\t\t\tthis.empty().append( value );\n\t\t\t}\n\t\t}, null, value, arguments.length );\n\t},\n\n\treplaceWith: function() {\n\t\tvar ignored = [];\n\n\t\t// Make the changes, replacing each non-ignored context element with the new content\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tvar parent = this.parentNode;\n\n\t\t\tif ( jQuery.inArray( this, ignored ) < 0 ) {\n\t\t\t\tjQuery.cleanData( getAll( this ) );\n\t\t\t\tif ( parent ) {\n\t\t\t\t\tparent.replaceChild( elem, this );\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Force callback invocation\n\t\t}, ignored );\n\t}\n} );\n\njQuery.each( {\n\tappendTo: \"append\",\n\tprependTo: \"prepend\",\n\tinsertBefore: \"before\",\n\tinsertAfter: \"after\",\n\treplaceAll: \"replaceWith\"\n}, function( name, original ) {\n\tjQuery.fn[ name ] = function( selector ) {\n\t\tvar elems,\n\t\t\tret = [],\n\t\t\tinsert = jQuery( selector ),\n\t\t\tlast = insert.length - 1,\n\t\t\ti = 0;\n\n\t\tfor ( ; i <= last; i++ ) {\n\t\t\telems = i === last ? this : this.clone( true );\n\t\t\tjQuery( insert[ i ] )[ original ]( elems );\n\n\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t// .get() because push.apply(_, arraylike) throws on ancient WebKit\n\t\t\tpush.apply( ret, elems.get() );\n\t\t}\n\n\t\treturn this.pushStack( ret );\n\t};\n} );\nvar rnumnonpx = new RegExp( \"^(\" + pnum + \")(?!px)[a-z%]+$\", \"i\" );\n\nvar getStyles = function( elem ) {\n\n\t\t// Support: IE <=11 only, Firefox <=30 (#15098, #14150)\n\t\t// IE throws on elements created in popups\n\t\t// FF meanwhile throws on frame elements through \"defaultView.getComputedStyle\"\n\t\tvar view = elem.ownerDocument.defaultView;\n\n\t\tif ( !view || !view.opener ) {\n\t\t\tview = window;\n\t\t}\n\n\t\treturn view.getComputedStyle( elem );\n\t};\n\nvar rboxStyle = new RegExp( cssExpand.join( \"|\" ), \"i\" );\n\n\n\n( function() {\n\n\t// Executing both pixelPosition & boxSizingReliable tests require only one layout\n\t// so they're executed at the same time to save the second computation.\n\tfunction computeStyleTests() {\n\n\t\t// This is a singleton, we need to execute it only once\n\t\tif ( !div ) {\n\t\t\treturn;\n\t\t}\n\n\t\tcontainer.style.cssText = \"position:absolute;left:-11111px;width:60px;\" +\n\t\t\t\"margin-top:1px;padding:0;border:0\";\n\t\tdiv.style.cssText =\n\t\t\t\"position:relative;display:block;box-sizing:border-box;overflow:scroll;\" +\n\t\t\t\"margin:auto;border:1px;padding:1px;\" +\n\t\t\t\"width:60%;top:1%\";\n\t\tdocumentElement.appendChild( container ).appendChild( div );\n\n\t\tvar divStyle = window.getComputedStyle( div );\n\t\tpixelPositionVal = divStyle.top !== \"1%\";\n\n\t\t// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44\n\t\treliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;\n\n\t\t// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3\n\t\t// Some styles come back with percentage values, even though they shouldn't\n\t\tdiv.style.right = \"60%\";\n\t\tpixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;\n\n\t\t// Support: IE 9 - 11 only\n\t\t// Detect misreporting of content dimensions for box-sizing:border-box elements\n\t\tboxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;\n\n\t\t// Support: IE 9 only\n\t\t// Detect overflow:scroll screwiness (gh-3699)\n\t\t// Support: Chrome <=64\n\t\t// Don't get tricked when zoom affects offsetWidth (gh-4029)\n\t\tdiv.style.position = \"absolute\";\n\t\tscrollboxSizeVal = roundPixelMeasures( div.offsetWidth / 3 ) === 12;\n\n\t\tdocumentElement.removeChild( container );\n\n\t\t// Nullify the div so it wouldn't be stored in the memory and\n\t\t// it will also be a sign that checks already performed\n\t\tdiv = null;\n\t}\n\n\tfunction roundPixelMeasures( measure ) {\n\t\treturn Math.round( parseFloat( measure ) );\n\t}\n\n\tvar pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,\n\t\treliableMarginLeftVal,\n\t\tcontainer = document.createElement( \"div\" ),\n\t\tdiv = document.createElement( \"div\" );\n\n\t// Finish early in limited (non-browser) environments\n\tif ( !div.style ) {\n\t\treturn;\n\t}\n\n\t// Support: IE <=9 - 11 only\n\t// Style of cloned element affects source element cloned (#8908)\n\tdiv.style.backgroundClip = \"content-box\";\n\tdiv.cloneNode( true ).style.backgroundClip = \"\";\n\tsupport.clearCloneStyle = div.style.backgroundClip === \"content-box\";\n\n\tjQuery.extend( support, {\n\t\tboxSizingReliable: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn boxSizingReliableVal;\n\t\t},\n\t\tpixelBoxStyles: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn pixelBoxStylesVal;\n\t\t},\n\t\tpixelPosition: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn pixelPositionVal;\n\t\t},\n\t\treliableMarginLeft: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn reliableMarginLeftVal;\n\t\t},\n\t\tscrollboxSize: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn scrollboxSizeVal;\n\t\t}\n\t} );\n} )();\n\n\nfunction curCSS( elem, name, computed ) {\n\tvar width, minWidth, maxWidth, ret,\n\n\t\t// Support: Firefox 51+\n\t\t// Retrieving style before computed somehow\n\t\t// fixes an issue with getting wrong values\n\t\t// on detached elements\n\t\tstyle = elem.style;\n\n\tcomputed = computed || getStyles( elem );\n\n\t// getPropertyValue is needed for:\n\t// .css('filter') (IE 9 only, #12537)\n\t// .css('--customProperty) (#3144)\n\tif ( computed ) {\n\t\tret = computed.getPropertyValue( name ) || computed[ name ];\n\n\t\tif ( ret === \"\" && !isAttached( elem ) ) {\n\t\t\tret = jQuery.style( elem, name );\n\t\t}\n\n\t\t// A tribute to the \"awesome hack by Dean Edwards\"\n\t\t// Android Browser returns percentage for some values,\n\t\t// but width seems to be reliably pixels.\n\t\t// This is against the CSSOM draft spec:\n\t\t// https://drafts.csswg.org/cssom/#resolved-values\n\t\tif ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.test( name ) ) {\n\n\t\t\t// Remember the original values\n\t\t\twidth = style.width;\n\t\t\tminWidth = style.minWidth;\n\t\t\tmaxWidth = style.maxWidth;\n\n\t\t\t// Put in the new values to get a computed value out\n\t\t\tstyle.minWidth = style.maxWidth = style.width = ret;\n\t\t\tret = computed.width;\n\n\t\t\t// Revert the changed values\n\t\t\tstyle.width = width;\n\t\t\tstyle.minWidth = minWidth;\n\t\t\tstyle.maxWidth = maxWidth;\n\t\t}\n\t}\n\n\treturn ret !== undefined ?\n\n\t\t// Support: IE <=9 - 11 only\n\t\t// IE returns zIndex value as an integer.\n\t\tret + \"\" :\n\t\tret;\n}\n\n\nfunction addGetHookIf( conditionFn, hookFn ) {\n\n\t// Define the hook, we'll check on the first run if it's really needed.\n\treturn {\n\t\tget: function() {\n\t\t\tif ( conditionFn() ) {\n\n\t\t\t\t// Hook not needed (or it's not possible to use it due\n\t\t\t\t// to missing dependency), remove it.\n\t\t\t\tdelete this.get;\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Hook needed; redefine it so that the support test is not executed again.\n\t\t\treturn ( this.get = hookFn ).apply( this, arguments );\n\t\t}\n\t};\n}\n\n\nvar cssPrefixes = [ \"Webkit\", \"Moz\", \"ms\" ],\n\temptyStyle = document.createElement( \"div\" ).style,\n\tvendorProps = {};\n\n// Return a vendor-prefixed property or undefined\nfunction vendorPropName( name ) {\n\n\t// Check for vendor prefixed names\n\tvar capName = name[ 0 ].toUpperCase() + name.slice( 1 ),\n\t\ti = cssPrefixes.length;\n\n\twhile ( i-- ) {\n\t\tname = cssPrefixes[ i ] + capName;\n\t\tif ( name in emptyStyle ) {\n\t\t\treturn name;\n\t\t}\n\t}\n}\n\n// Return a potentially-mapped jQuery.cssProps or vendor prefixed property\nfunction finalPropName( name ) {\n\tvar final = jQuery.cssProps[ name ] || vendorProps[ name ];\n\n\tif ( final ) {\n\t\treturn final;\n\t}\n\tif ( name in emptyStyle ) {\n\t\treturn name;\n\t}\n\treturn vendorProps[ name ] = vendorPropName( name ) || name;\n}\n\n\nvar\n\n\t// Swappable if display is none or starts with table\n\t// except \"table\", \"table-cell\", or \"table-caption\"\n\t// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display\n\trdisplayswap = /^(none|table(?!-c[ea]).+)/,\n\trcustomProp = /^--/,\n\tcssShow = { position: \"absolute\", visibility: \"hidden\", display: \"block\" },\n\tcssNormalTransform = {\n\t\tletterSpacing: \"0\",\n\t\tfontWeight: \"400\"\n\t};\n\nfunction setPositiveNumber( elem, value, subtract ) {\n\n\t// Any relative (+/-) values have already been\n\t// normalized at this point\n\tvar matches = rcssNum.exec( value );\n\treturn matches ?\n\n\t\t// Guard against undefined \"subtract\", e.g., when used as in cssHooks\n\t\tMath.max( 0, matches[ 2 ] - ( subtract || 0 ) ) + ( matches[ 3 ] || \"px\" ) :\n\t\tvalue;\n}\n\nfunction boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computedVal ) {\n\tvar i = dimension === \"width\" ? 1 : 0,\n\t\textra = 0,\n\t\tdelta = 0;\n\n\t// Adjustment may not be necessary\n\tif ( box === ( isBorderBox ? \"border\" : \"content\" ) ) {\n\t\treturn 0;\n\t}\n\n\tfor ( ; i < 4; i += 2 ) {\n\n\t\t// Both box models exclude margin\n\t\tif ( box === \"margin\" ) {\n\t\t\tdelta += jQuery.css( elem, box + cssExpand[ i ], true, styles );\n\t\t}\n\n\t\t// If we get here with a content-box, we're seeking \"padding\" or \"border\" or \"margin\"\n\t\tif ( !isBorderBox ) {\n\n\t\t\t// Add padding\n\t\t\tdelta += jQuery.css( elem, \"padding\" + cssExpand[ i ], true, styles );\n\n\t\t\t// For \"border\" or \"margin\", add border\n\t\t\tif ( box !== \"padding\" ) {\n\t\t\t\tdelta += jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\n\t\t\t// But still keep track of it otherwise\n\t\t\t} else {\n\t\t\t\textra += jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\t\t\t}\n\n\t\t// If we get here with a border-box (content + padding + border), we're seeking \"content\" or\n\t\t// \"padding\" or \"margin\"\n\t\t} else {\n\n\t\t\t// For \"content\", subtract padding\n\t\t\tif ( box === \"content\" ) {\n\t\t\t\tdelta -= jQuery.css( elem, \"padding\" + cssExpand[ i ], true, styles );\n\t\t\t}\n\n\t\t\t// For \"content\" or \"padding\", subtract border\n\t\t\tif ( box !== \"margin\" ) {\n\t\t\t\tdelta -= jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Account for positive content-box scroll gutter when requested by providing computedVal\n\tif ( !isBorderBox && computedVal >= 0 ) {\n\n\t\t// offsetWidth/offsetHeight is a rounded sum of content, padding, scroll gutter, and border\n\t\t// Assuming integer scroll gutter, subtract the rest and round down\n\t\tdelta += Math.max( 0, Math.ceil(\n\t\t\telem[ \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -\n\t\t\tcomputedVal -\n\t\t\tdelta -\n\t\t\textra -\n\t\t\t0.5\n\n\t\t// If offsetWidth/offsetHeight is unknown, then we can't determine content-box scroll gutter\n\t\t// Use an explicit zero to avoid NaN (gh-3964)\n\t\t) ) || 0;\n\t}\n\n\treturn delta;\n}\n\nfunction getWidthOrHeight( elem, dimension, extra ) {\n\n\t// Start with computed style\n\tvar styles = getStyles( elem ),\n\n\t\t// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-4322).\n\t\t// Fake content-box until we know it's needed to know the true value.\n\t\tboxSizingNeeded = !support.boxSizingReliable() || extra,\n\t\tisBorderBox = boxSizingNeeded &&\n\t\t\tjQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\",\n\t\tvalueIsBorderBox = isBorderBox,\n\n\t\tval = curCSS( elem, dimension, styles ),\n\t\toffsetProp = \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );\n\n\t// Support: Firefox <=54\n\t// Return a confounding non-pixel value or feign ignorance, as appropriate.\n\tif ( rnumnonpx.test( val ) ) {\n\t\tif ( !extra ) {\n\t\t\treturn val;\n\t\t}\n\t\tval = \"auto\";\n\t}\n\n\n\t// Fall back to offsetWidth/offsetHeight when value is \"auto\"\n\t// This happens for inline elements with no explicit setting (gh-3571)\n\t// Support: Android <=4.1 - 4.3 only\n\t// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)\n\t// Support: IE 9-11 only\n\t// Also use offsetWidth/offsetHeight for when box sizing is unreliable\n\t// We use getClientRects() to check for hidden/disconnected.\n\t// In those cases, the computed value can be trusted to be border-box\n\tif ( ( !support.boxSizingReliable() && isBorderBox ||\n\t\tval === \"auto\" ||\n\t\t!parseFloat( val ) && jQuery.css( elem, \"display\", false, styles ) === \"inline\" ) &&\n\t\telem.getClientRects().length ) {\n\n\t\tisBorderBox = jQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\";\n\n\t\t// Where available, offsetWidth/offsetHeight approximate border box dimensions.\n\t\t// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the\n\t\t// retrieved value as a content box dimension.\n\t\tvalueIsBorderBox = offsetProp in elem;\n\t\tif ( valueIsBorderBox ) {\n\t\t\tval = elem[ offsetProp ];\n\t\t}\n\t}\n\n\t// Normalize \"\" and auto\n\tval = parseFloat( val ) || 0;\n\n\t// Adjust for the element's box model\n\treturn ( val +\n\t\tboxModelAdjustment(\n\t\t\telem,\n\t\t\tdimension,\n\t\t\textra || ( isBorderBox ? \"border\" : \"content\" ),\n\t\t\tvalueIsBorderBox,\n\t\t\tstyles,\n\n\t\t\t// Provide the current computed size to request scroll gutter calculation (gh-3589)\n\t\t\tval\n\t\t)\n\t) + \"px\";\n}\n\njQuery.extend( {\n\n\t// Add in style property hooks for overriding the default\n\t// behavior of getting and setting a style property\n\tcssHooks: {\n\t\topacity: {\n\t\t\tget: function( elem, computed ) {\n\t\t\t\tif ( computed ) {\n\n\t\t\t\t\t// We should always get a number back from opacity\n\t\t\t\t\tvar ret = curCSS( elem, \"opacity\" );\n\t\t\t\t\treturn ret === \"\" ? \"1\" : ret;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t},\n\n\t// Don't automatically add \"px\" to these possibly-unitless properties\n\tcssNumber: {\n\t\t\"animationIterationCount\": true,\n\t\t\"columnCount\": true,\n\t\t\"fillOpacity\": true,\n\t\t\"flexGrow\": true,\n\t\t\"flexShrink\": true,\n\t\t\"fontWeight\": true,\n\t\t\"gridArea\": true,\n\t\t\"gridColumn\": true,\n\t\t\"gridColumnEnd\": true,\n\t\t\"gridColumnStart\": true,\n\t\t\"gridRow\": true,\n\t\t\"gridRowEnd\": true,\n\t\t\"gridRowStart\": true,\n\t\t\"lineHeight\": true,\n\t\t\"opacity\": true,\n\t\t\"order\": true,\n\t\t\"orphans\": true,\n\t\t\"widows\": true,\n\t\t\"zIndex\": true,\n\t\t\"zoom\": true\n\t},\n\n\t// Add in properties whose names you wish to fix before\n\t// setting or getting the value\n\tcssProps: {},\n\n\t// Get and set the style property on a DOM Node\n\tstyle: function( elem, name, value, extra ) {\n\n\t\t// Don't set styles on text and comment nodes\n\t\tif ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Make sure that we're working with the right name\n\t\tvar ret, type, hooks,\n\t\t\torigName = camelCase( name ),\n\t\t\tisCustomProp = rcustomProp.test( name ),\n\t\t\tstyle = elem.style;\n\n\t\t// Make sure that we're working with the right name. We don't\n\t\t// want to query the value if it is a CSS custom property\n\t\t// since they are user-defined.\n\t\tif ( !isCustomProp ) {\n\t\t\tname = finalPropName( origName );\n\t\t}\n\n\t\t// Gets hook for the prefixed version, then unprefixed version\n\t\thooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];\n\n\t\t// Check if we're setting a value\n\t\tif ( value !== undefined ) {\n\t\t\ttype = typeof value;\n\n\t\t\t// Convert \"+=\" or \"-=\" to relative numbers (#7345)\n\t\t\tif ( type === \"string\" && ( ret = rcssNum.exec( value ) ) && ret[ 1 ] ) {\n\t\t\t\tvalue = adjustCSS( elem, name, ret );\n\n\t\t\t\t// Fixes bug #9237\n\t\t\t\ttype = \"number\";\n\t\t\t}\n\n\t\t\t// Make sure that null and NaN values aren't set (#7116)\n\t\t\tif ( value == null || value !== value ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If a number was passed in, add the unit (except for certain CSS properties)\n\t\t\t// The isCustomProp check can be removed in jQuery 4.0 when we only auto-append\n\t\t\t// \"px\" to a few hardcoded values.\n\t\t\tif ( type === \"number\" && !isCustomProp ) {\n\t\t\t\tvalue += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? \"\" : \"px\" );\n\t\t\t}\n\n\t\t\t// background-* props affect original clone's values\n\t\t\tif ( !support.clearCloneStyle && value === \"\" && name.indexOf( \"background\" ) === 0 ) {\n\t\t\t\tstyle[ name ] = \"inherit\";\n\t\t\t}\n\n\t\t\t// If a hook was provided, use that value, otherwise just set the specified value\n\t\t\tif ( !hooks || !( \"set\" in hooks ) ||\n\t\t\t\t( value = hooks.set( elem, value, extra ) ) !== undefined ) {\n\n\t\t\t\tif ( isCustomProp ) {\n\t\t\t\t\tstyle.setProperty( name, value );\n\t\t\t\t} else {\n\t\t\t\t\tstyle[ name ] = value;\n\t\t\t\t}\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// If a hook was provided get the non-computed value from there\n\t\t\tif ( hooks && \"get\" in hooks &&\n\t\t\t\t( ret = hooks.get( elem, false, extra ) ) !== undefined ) {\n\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\t// Otherwise just get the value from the style object\n\t\t\treturn style[ name ];\n\t\t}\n\t},\n\n\tcss: function( elem, name, extra, styles ) {\n\t\tvar val, num, hooks,\n\t\t\torigName = camelCase( name ),\n\t\t\tisCustomProp = rcustomProp.test( name );\n\n\t\t// Make sure that we're working with the right name. We don't\n\t\t// want to modify the value if it is a CSS custom property\n\t\t// since they are user-defined.\n\t\tif ( !isCustomProp ) {\n\t\t\tname = finalPropName( origName );\n\t\t}\n\n\t\t// Try prefixed name followed by the unprefixed name\n\t\thooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];\n\n\t\t// If a hook was provided get the computed value from there\n\t\tif ( hooks && \"get\" in hooks ) {\n\t\t\tval = hooks.get( elem, true, extra );\n\t\t}\n\n\t\t// Otherwise, if a way to get the computed value exists, use that\n\t\tif ( val === undefined ) {\n\t\t\tval = curCSS( elem, name, styles );\n\t\t}\n\n\t\t// Convert \"normal\" to computed value\n\t\tif ( val === \"normal\" && name in cssNormalTransform ) {\n\t\t\tval = cssNormalTransform[ name ];\n\t\t}\n\n\t\t// Make numeric if forced or a qualifier was provided and val looks numeric\n\t\tif ( extra === \"\" || extra ) {\n\t\t\tnum = parseFloat( val );\n\t\t\treturn extra === true || isFinite( num ) ? num || 0 : val;\n\t\t}\n\n\t\treturn val;\n\t}\n} );\n\njQuery.each( [ \"height\", \"width\" ], function( i, dimension ) {\n\tjQuery.cssHooks[ dimension ] = {\n\t\tget: function( elem, computed, extra ) {\n\t\t\tif ( computed ) {\n\n\t\t\t\t// Certain elements can have dimension info if we invisibly show them\n\t\t\t\t// but it must have a current display style that would benefit\n\t\t\t\treturn rdisplayswap.test( jQuery.css( elem, \"display\" ) ) &&\n\n\t\t\t\t\t// Support: Safari 8+\n\t\t\t\t\t// Table columns in Safari have non-zero offsetWidth & zero\n\t\t\t\t\t// getBoundingClientRect().width unless display is changed.\n\t\t\t\t\t// Support: IE <=11 only\n\t\t\t\t\t// Running getBoundingClientRect on a disconnected node\n\t\t\t\t\t// in IE throws an error.\n\t\t\t\t\t( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?\n\t\t\t\t\t\tswap( elem, cssShow, function() {\n\t\t\t\t\t\t\treturn getWidthOrHeight( elem, dimension, extra );\n\t\t\t\t\t\t} ) :\n\t\t\t\t\t\tgetWidthOrHeight( elem, dimension, extra );\n\t\t\t}\n\t\t},\n\n\t\tset: function( elem, value, extra ) {\n\t\t\tvar matches,\n\t\t\t\tstyles = getStyles( elem ),\n\n\t\t\t\t// Only read styles.position if the test has a chance to fail\n\t\t\t\t// to avoid forcing a reflow.\n\t\t\t\tscrollboxSizeBuggy = !support.scrollboxSize() &&\n\t\t\t\t\tstyles.position === \"absolute\",\n\n\t\t\t\t// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991)\n\t\t\t\tboxSizingNeeded = scrollboxSizeBuggy || extra,\n\t\t\t\tisBorderBox = boxSizingNeeded &&\n\t\t\t\t\tjQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\",\n\t\t\t\tsubtract = extra ?\n\t\t\t\t\tboxModelAdjustment(\n\t\t\t\t\t\telem,\n\t\t\t\t\t\tdimension,\n\t\t\t\t\t\textra,\n\t\t\t\t\t\tisBorderBox,\n\t\t\t\t\t\tstyles\n\t\t\t\t\t) :\n\t\t\t\t\t0;\n\n\t\t\t// Account for unreliable border-box dimensions by comparing offset* to computed and\n\t\t\t// faking a content-box to get border and padding (gh-3699)\n\t\t\tif ( isBorderBox && scrollboxSizeBuggy ) {\n\t\t\t\tsubtract -= Math.ceil(\n\t\t\t\t\telem[ \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -\n\t\t\t\t\tparseFloat( styles[ dimension ] ) -\n\t\t\t\t\tboxModelAdjustment( elem, dimension, \"border\", false, styles ) -\n\t\t\t\t\t0.5\n\t\t\t\t);\n\t\t\t}\n\n\t\t\t// Convert to pixels if value adjustment is needed\n\t\t\tif ( subtract && ( matches = rcssNum.exec( value ) ) &&\n\t\t\t\t( matches[ 3 ] || \"px\" ) !== \"px\" ) {\n\n\t\t\t\telem.style[ dimension ] = value;\n\t\t\t\tvalue = jQuery.css( elem, dimension );\n\t\t\t}\n\n\t\t\treturn setPositiveNumber( elem, value, subtract );\n\t\t}\n\t};\n} );\n\njQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,\n\tfunction( elem, computed ) {\n\t\tif ( computed ) {\n\t\t\treturn ( parseFloat( curCSS( elem, \"marginLeft\" ) ) ||\n\t\t\t\telem.getBoundingClientRect().left -\n\t\t\t\t\tswap( elem, { marginLeft: 0 }, function() {\n\t\t\t\t\t\treturn elem.getBoundingClientRect().left;\n\t\t\t\t\t} )\n\t\t\t\t) + \"px\";\n\t\t}\n\t}\n);\n\n// These hooks are used by animate to expand properties\njQuery.each( {\n\tmargin: \"\",\n\tpadding: \"\",\n\tborder: \"Width\"\n}, function( prefix, suffix ) {\n\tjQuery.cssHooks[ prefix + suffix ] = {\n\t\texpand: function( value ) {\n\t\t\tvar i = 0,\n\t\t\t\texpanded = {},\n\n\t\t\t\t// Assumes a single number if not a string\n\t\t\t\tparts = typeof value === \"string\" ? value.split( \" \" ) : [ value ];\n\n\t\t\tfor ( ; i < 4; i++ ) {\n\t\t\t\texpanded[ prefix + cssExpand[ i ] + suffix ] =\n\t\t\t\t\tparts[ i ] || parts[ i - 2 ] || parts[ 0 ];\n\t\t\t}\n\n\t\t\treturn expanded;\n\t\t}\n\t};\n\n\tif ( prefix !== \"margin\" ) {\n\t\tjQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;\n\t}\n} );\n\njQuery.fn.extend( {\n\tcss: function( name, value ) {\n\t\treturn access( this, function( elem, name, value ) {\n\t\t\tvar styles, len,\n\t\t\t\tmap = {},\n\t\t\t\ti = 0;\n\n\t\t\tif ( Array.isArray( name ) ) {\n\t\t\t\tstyles = getStyles( elem );\n\t\t\t\tlen = name.length;\n\n\t\t\t\tfor ( ; i < len; i++ ) {\n\t\t\t\t\tmap[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );\n\t\t\t\t}\n\n\t\t\t\treturn map;\n\t\t\t}\n\n\t\t\treturn value !== undefined ?\n\t\t\t\tjQuery.style( elem, name, value ) :\n\t\t\t\tjQuery.css( elem, name );\n\t\t}, name, value, arguments.length > 1 );\n\t}\n} );\n\n\nfunction Tween( elem, options, prop, end, easing ) {\n\treturn new Tween.prototype.init( elem, options, prop, end, easing );\n}\njQuery.Tween = Tween;\n\nTween.prototype = {\n\tconstructor: Tween,\n\tinit: function( elem, options, prop, end, easing, unit ) {\n\t\tthis.elem = elem;\n\t\tthis.prop = prop;\n\t\tthis.easing = easing || jQuery.easing._default;\n\t\tthis.options = options;\n\t\tthis.start = this.now = this.cur();\n\t\tthis.end = end;\n\t\tthis.unit = unit || ( jQuery.cssNumber[ prop ] ? \"\" : \"px\" );\n\t},\n\tcur: function() {\n\t\tvar hooks = Tween.propHooks[ this.prop ];\n\n\t\treturn hooks && hooks.get ?\n\t\t\thooks.get( this ) :\n\t\t\tTween.propHooks._default.get( this );\n\t},\n\trun: function( percent ) {\n\t\tvar eased,\n\t\t\thooks = Tween.propHooks[ this.prop ];\n\n\t\tif ( this.options.duration ) {\n\t\t\tthis.pos = eased = jQuery.easing[ this.easing ](\n\t\t\t\tpercent, this.options.duration * percent, 0, 1, this.options.duration\n\t\t\t);\n\t\t} else {\n\t\t\tthis.pos = eased = percent;\n\t\t}\n\t\tthis.now = ( this.end - this.start ) * eased + this.start;\n\n\t\tif ( this.options.step ) {\n\t\t\tthis.options.step.call( this.elem, this.now, this );\n\t\t}\n\n\t\tif ( hooks && hooks.set ) {\n\t\t\thooks.set( this );\n\t\t} else {\n\t\t\tTween.propHooks._default.set( this );\n\t\t}\n\t\treturn this;\n\t}\n};\n\nTween.prototype.init.prototype = Tween.prototype;\n\nTween.propHooks = {\n\t_default: {\n\t\tget: function( tween ) {\n\t\t\tvar result;\n\n\t\t\t// Use a property on the element directly when it is not a DOM element,\n\t\t\t// or when there is no matching style property that exists.\n\t\t\tif ( tween.elem.nodeType !== 1 ||\n\t\t\t\ttween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {\n\t\t\t\treturn tween.elem[ tween.prop ];\n\t\t\t}\n\n\t\t\t// Passing an empty string as a 3rd parameter to .css will automatically\n\t\t\t// attempt a parseFloat and fallback to a string if the parse fails.\n\t\t\t// Simple values such as \"10px\" are parsed to Float;\n\t\t\t// complex values such as \"rotate(1rad)\" are returned as-is.\n\t\t\tresult = jQuery.css( tween.elem, tween.prop, \"\" );\n\n\t\t\t// Empty strings, null, undefined and \"auto\" are converted to 0.\n\t\t\treturn !result || result === \"auto\" ? 0 : result;\n\t\t},\n\t\tset: function( tween ) {\n\n\t\t\t// Use step hook for back compat.\n\t\t\t// Use cssHook if its there.\n\t\t\t// Use .style if available and use plain properties where available.\n\t\t\tif ( jQuery.fx.step[ tween.prop ] ) {\n\t\t\t\tjQuery.fx.step[ tween.prop ]( tween );\n\t\t\t} else if ( tween.elem.nodeType === 1 && (\n\t\t\t\t\tjQuery.cssHooks[ tween.prop ] ||\n\t\t\t\t\ttween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {\n\t\t\t\tjQuery.style( tween.elem, tween.prop, tween.now + tween.unit );\n\t\t\t} else {\n\t\t\t\ttween.elem[ tween.prop ] = tween.now;\n\t\t\t}\n\t\t}\n\t}\n};\n\n// Support: IE <=9 only\n// Panic based approach to setting things on disconnected nodes\nTween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {\n\tset: function( tween ) {\n\t\tif ( tween.elem.nodeType && tween.elem.parentNode ) {\n\t\t\ttween.elem[ tween.prop ] = tween.now;\n\t\t}\n\t}\n};\n\njQuery.easing = {\n\tlinear: function( p ) {\n\t\treturn p;\n\t},\n\tswing: function( p ) {\n\t\treturn 0.5 - Math.cos( p * Math.PI ) / 2;\n\t},\n\t_default: \"swing\"\n};\n\njQuery.fx = Tween.prototype.init;\n\n// Back compat <1.8 extension point\njQuery.fx.step = {};\n\n\n\n\nvar\n\tfxNow, inProgress,\n\trfxtypes = /^(?:toggle|show|hide)$/,\n\trrun = /queueHooks$/;\n\nfunction schedule() {\n\tif ( inProgress ) {\n\t\tif ( document.hidden === false && window.requestAnimationFrame ) {\n\t\t\twindow.requestAnimationFrame( schedule );\n\t\t} else {\n\t\t\twindow.setTimeout( schedule, jQuery.fx.interval );\n\t\t}\n\n\t\tjQuery.fx.tick();\n\t}\n}\n\n// Animations created synchronously will run synchronously\nfunction createFxNow() {\n\twindow.setTimeout( function() {\n\t\tfxNow = undefined;\n\t} );\n\treturn ( fxNow = Date.now() );\n}\n\n// Generate parameters to create a standard animation\nfunction genFx( type, includeWidth ) {\n\tvar which,\n\t\ti = 0,\n\t\tattrs = { height: type };\n\n\t// If we include width, step value is 1 to do all cssExpand values,\n\t// otherwise step value is 2 to skip over Left and Right\n\tincludeWidth = includeWidth ? 1 : 0;\n\tfor ( ; i < 4; i += 2 - includeWidth ) {\n\t\twhich = cssExpand[ i ];\n\t\tattrs[ \"margin\" + which ] = attrs[ \"padding\" + which ] = type;\n\t}\n\n\tif ( includeWidth ) {\n\t\tattrs.opacity = attrs.width = type;\n\t}\n\n\treturn attrs;\n}\n\nfunction createTween( value, prop, animation ) {\n\tvar tween,\n\t\tcollection = ( Animation.tweeners[ prop ] || [] ).concat( Animation.tweeners[ \"*\" ] ),\n\t\tindex = 0,\n\t\tlength = collection.length;\n\tfor ( ; index < length; index++ ) {\n\t\tif ( ( tween = collection[ index ].call( animation, prop, value ) ) ) {\n\n\t\t\t// We're done with this property\n\t\t\treturn tween;\n\t\t}\n\t}\n}\n\nfunction defaultPrefilter( elem, props, opts ) {\n\tvar prop, value, toggle, hooks, oldfire, propTween, restoreDisplay, display,\n\t\tisBox = \"width\" in props || \"height\" in props,\n\t\tanim = this,\n\t\torig = {},\n\t\tstyle = elem.style,\n\t\thidden = elem.nodeType && isHiddenWithinTree( elem ),\n\t\tdataShow = dataPriv.get( elem, \"fxshow\" );\n\n\t// Queue-skipping animations hijack the fx hooks\n\tif ( !opts.queue ) {\n\t\thooks = jQuery._queueHooks( elem, \"fx\" );\n\t\tif ( hooks.unqueued == null ) {\n\t\t\thooks.unqueued = 0;\n\t\t\toldfire = hooks.empty.fire;\n\t\t\thooks.empty.fire = function() {\n\t\t\t\tif ( !hooks.unqueued ) {\n\t\t\t\t\toldfire();\n\t\t\t\t}\n\t\t\t};\n\t\t}\n\t\thooks.unqueued++;\n\n\t\tanim.always( function() {\n\n\t\t\t// Ensure the complete handler is called before this completes\n\t\t\tanim.always( function() {\n\t\t\t\thooks.unqueued--;\n\t\t\t\tif ( !jQuery.queue( elem, \"fx\" ).length ) {\n\t\t\t\t\thooks.empty.fire();\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n\n\t// Detect show/hide animations\n\tfor ( prop in props ) {\n\t\tvalue = props[ prop ];\n\t\tif ( rfxtypes.test( value ) ) {\n\t\t\tdelete props[ prop ];\n\t\t\ttoggle = toggle || value === \"toggle\";\n\t\t\tif ( value === ( hidden ? \"hide\" : \"show\" ) ) {\n\n\t\t\t\t// Pretend to be hidden if this is a \"show\" and\n\t\t\t\t// there is still data from a stopped show/hide\n\t\t\t\tif ( value === \"show\" && dataShow && dataShow[ prop ] !== undefined ) {\n\t\t\t\t\thidden = true;\n\n\t\t\t\t// Ignore all other no-op show/hide data\n\t\t\t\t} else {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\t\t\t}\n\t\t\torig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );\n\t\t}\n\t}\n\n\t// Bail out if this is a no-op like .hide().hide()\n\tpropTween = !jQuery.isEmptyObject( props );\n\tif ( !propTween && jQuery.isEmptyObject( orig ) ) {\n\t\treturn;\n\t}\n\n\t// Restrict \"overflow\" and \"display\" styles during box animations\n\tif ( isBox && elem.nodeType === 1 ) {\n\n\t\t// Support: IE <=9 - 11, Edge 12 - 15\n\t\t// Record all 3 overflow attributes because IE does not infer the shorthand\n\t\t// from identically-valued overflowX and overflowY and Edge just mirrors\n\t\t// the overflowX value there.\n\t\topts.overflow = [ style.overflow, style.overflowX, style.overflowY ];\n\n\t\t// Identify a display type, preferring old show/hide data over the CSS cascade\n\t\trestoreDisplay = dataShow && dataShow.display;\n\t\tif ( restoreDisplay == null ) {\n\t\t\trestoreDisplay = dataPriv.get( elem, \"display\" );\n\t\t}\n\t\tdisplay = jQuery.css( elem, \"display\" );\n\t\tif ( display === \"none\" ) {\n\t\t\tif ( restoreDisplay ) {\n\t\t\t\tdisplay = restoreDisplay;\n\t\t\t} else {\n\n\t\t\t\t// Get nonempty value(s) by temporarily forcing visibility\n\t\t\t\tshowHide( [ elem ], true );\n\t\t\t\trestoreDisplay = elem.style.display || restoreDisplay;\n\t\t\t\tdisplay = jQuery.css( elem, \"display\" );\n\t\t\t\tshowHide( [ elem ] );\n\t\t\t}\n\t\t}\n\n\t\t// Animate inline elements as inline-block\n\t\tif ( display === \"inline\" || display === \"inline-block\" && restoreDisplay != null ) {\n\t\t\tif ( jQuery.css( elem, \"float\" ) === \"none\" ) {\n\n\t\t\t\t// Restore the original display value at the end of pure show/hide animations\n\t\t\t\tif ( !propTween ) {\n\t\t\t\t\tanim.done( function() {\n\t\t\t\t\t\tstyle.display = restoreDisplay;\n\t\t\t\t\t} );\n\t\t\t\t\tif ( restoreDisplay == null ) {\n\t\t\t\t\t\tdisplay = style.display;\n\t\t\t\t\t\trestoreDisplay = display === \"none\" ? \"\" : display;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tstyle.display = \"inline-block\";\n\t\t\t}\n\t\t}\n\t}\n\n\tif ( opts.overflow ) {\n\t\tstyle.overflow = \"hidden\";\n\t\tanim.always( function() {\n\t\t\tstyle.overflow = opts.overflow[ 0 ];\n\t\t\tstyle.overflowX = opts.overflow[ 1 ];\n\t\t\tstyle.overflowY = opts.overflow[ 2 ];\n\t\t} );\n\t}\n\n\t// Implement show/hide animations\n\tpropTween = false;\n\tfor ( prop in orig ) {\n\n\t\t// General show/hide setup for this element animation\n\t\tif ( !propTween ) {\n\t\t\tif ( dataShow ) {\n\t\t\t\tif ( \"hidden\" in dataShow ) {\n\t\t\t\t\thidden = dataShow.hidden;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tdataShow = dataPriv.access( elem, \"fxshow\", { display: restoreDisplay } );\n\t\t\t}\n\n\t\t\t// Store hidden/visible for toggle so `.stop().toggle()` \"reverses\"\n\t\t\tif ( toggle ) {\n\t\t\t\tdataShow.hidden = !hidden;\n\t\t\t}\n\n\t\t\t// Show elements before animating them\n\t\t\tif ( hidden ) {\n\t\t\t\tshowHide( [ elem ], true );\n\t\t\t}\n\n\t\t\t/* eslint-disable no-loop-func */\n\n\t\t\tanim.done( function() {\n\n\t\t\t/* eslint-enable no-loop-func */\n\n\t\t\t\t// The final step of a \"hide\" animation is actually hiding the element\n\t\t\t\tif ( !hidden ) {\n\t\t\t\t\tshowHide( [ elem ] );\n\t\t\t\t}\n\t\t\t\tdataPriv.remove( elem, \"fxshow\" );\n\t\t\t\tfor ( prop in orig ) {\n\t\t\t\t\tjQuery.style( elem, prop, orig[ prop ] );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\t// Per-property setup\n\t\tpropTween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );\n\t\tif ( !( prop in dataShow ) ) {\n\t\t\tdataShow[ prop ] = propTween.start;\n\t\t\tif ( hidden ) {\n\t\t\t\tpropTween.end = propTween.start;\n\t\t\t\tpropTween.start = 0;\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction propFilter( props, specialEasing ) {\n\tvar index, name, easing, value, hooks;\n\n\t// camelCase, specialEasing and expand cssHook pass\n\tfor ( index in props ) {\n\t\tname = camelCase( index );\n\t\teasing = specialEasing[ name ];\n\t\tvalue = props[ index ];\n\t\tif ( Array.isArray( value ) ) {\n\t\t\teasing = value[ 1 ];\n\t\t\tvalue = props[ index ] = value[ 0 ];\n\t\t}\n\n\t\tif ( index !== name ) {\n\t\t\tprops[ name ] = value;\n\t\t\tdelete props[ index ];\n\t\t}\n\n\t\thooks = jQuery.cssHooks[ name ];\n\t\tif ( hooks && \"expand\" in hooks ) {\n\t\t\tvalue = hooks.expand( value );\n\t\t\tdelete props[ name ];\n\n\t\t\t// Not quite $.extend, this won't overwrite existing keys.\n\t\t\t// Reusing 'index' because we have the correct \"name\"\n\t\t\tfor ( index in value ) {\n\t\t\t\tif ( !( index in props ) ) {\n\t\t\t\t\tprops[ index ] = value[ index ];\n\t\t\t\t\tspecialEasing[ index ] = easing;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tspecialEasing[ name ] = easing;\n\t\t}\n\t}\n}\n\nfunction Animation( elem, properties, options ) {\n\tvar result,\n\t\tstopped,\n\t\tindex = 0,\n\t\tlength = Animation.prefilters.length,\n\t\tdeferred = jQuery.Deferred().always( function() {\n\n\t\t\t// Don't match elem in the :animated selector\n\t\t\tdelete tick.elem;\n\t\t} ),\n\t\ttick = function() {\n\t\t\tif ( stopped ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t\tvar currentTime = fxNow || createFxNow(),\n\t\t\t\tremaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),\n\n\t\t\t\t// Support: Android 2.3 only\n\t\t\t\t// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)\n\t\t\t\ttemp = remaining / animation.duration || 0,\n\t\t\t\tpercent = 1 - temp,\n\t\t\t\tindex = 0,\n\t\t\t\tlength = animation.tweens.length;\n\n\t\t\tfor ( ; index < length; index++ ) {\n\t\t\t\tanimation.tweens[ index ].run( percent );\n\t\t\t}\n\n\t\t\tdeferred.notifyWith( elem, [ animation, percent, remaining ] );\n\n\t\t\t// If there's more to do, yield\n\t\t\tif ( percent < 1 && length ) {\n\t\t\t\treturn remaining;\n\t\t\t}\n\n\t\t\t// If this was an empty animation, synthesize a final progress notification\n\t\t\tif ( !length ) {\n\t\t\t\tdeferred.notifyWith( elem, [ animation, 1, 0 ] );\n\t\t\t}\n\n\t\t\t// Resolve the animation and report its conclusion\n\t\t\tdeferred.resolveWith( elem, [ animation ] );\n\t\t\treturn false;\n\t\t},\n\t\tanimation = deferred.promise( {\n\t\t\telem: elem,\n\t\t\tprops: jQuery.extend( {}, properties ),\n\t\t\topts: jQuery.extend( true, {\n\t\t\t\tspecialEasing: {},\n\t\t\t\teasing: jQuery.easing._default\n\t\t\t}, options ),\n\t\t\toriginalProperties: properties,\n\t\t\toriginalOptions: options,\n\t\t\tstartTime: fxNow || createFxNow(),\n\t\t\tduration: options.duration,\n\t\t\ttweens: [],\n\t\t\tcreateTween: function( prop, end ) {\n\t\t\t\tvar tween = jQuery.Tween( elem, animation.opts, prop, end,\n\t\t\t\t\t\tanimation.opts.specialEasing[ prop ] || animation.opts.easing );\n\t\t\t\tanimation.tweens.push( tween );\n\t\t\t\treturn tween;\n\t\t\t},\n\t\t\tstop: function( gotoEnd ) {\n\t\t\t\tvar index = 0,\n\n\t\t\t\t\t// If we are going to the end, we want to run all the tweens\n\t\t\t\t\t// otherwise we skip this part\n\t\t\t\t\tlength = gotoEnd ? animation.tweens.length : 0;\n\t\t\t\tif ( stopped ) {\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\t\t\t\tstopped = true;\n\t\t\t\tfor ( ; index < length; index++ ) {\n\t\t\t\t\tanimation.tweens[ index ].run( 1 );\n\t\t\t\t}\n\n\t\t\t\t// Resolve when we played the last frame; otherwise, reject\n\t\t\t\tif ( gotoEnd ) {\n\t\t\t\t\tdeferred.notifyWith( elem, [ animation, 1, 0 ] );\n\t\t\t\t\tdeferred.resolveWith( elem, [ animation, gotoEnd ] );\n\t\t\t\t} else {\n\t\t\t\t\tdeferred.rejectWith( elem, [ animation, gotoEnd ] );\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t}\n\t\t} ),\n\t\tprops = animation.props;\n\n\tpropFilter( props, animation.opts.specialEasing );\n\n\tfor ( ; index < length; index++ ) {\n\t\tresult = Animation.prefilters[ index ].call( animation, elem, props, animation.opts );\n\t\tif ( result ) {\n\t\t\tif ( isFunction( result.stop ) ) {\n\t\t\t\tjQuery._queueHooks( animation.elem, animation.opts.queue ).stop =\n\t\t\t\t\tresult.stop.bind( result );\n\t\t\t}\n\t\t\treturn result;\n\t\t}\n\t}\n\n\tjQuery.map( props, createTween, animation );\n\n\tif ( isFunction( animation.opts.start ) ) {\n\t\tanimation.opts.start.call( elem, animation );\n\t}\n\n\t// Attach callbacks from options\n\tanimation\n\t\t.progress( animation.opts.progress )\n\t\t.done( animation.opts.done, animation.opts.complete )\n\t\t.fail( animation.opts.fail )\n\t\t.always( animation.opts.always );\n\n\tjQuery.fx.timer(\n\t\tjQuery.extend( tick, {\n\t\t\telem: elem,\n\t\t\tanim: animation,\n\t\t\tqueue: animation.opts.queue\n\t\t} )\n\t);\n\n\treturn animation;\n}\n\njQuery.Animation = jQuery.extend( Animation, {\n\n\ttweeners: {\n\t\t\"*\": [ function( prop, value ) {\n\t\t\tvar tween = this.createTween( prop, value );\n\t\t\tadjustCSS( tween.elem, prop, rcssNum.exec( value ), tween );\n\t\t\treturn tween;\n\t\t} ]\n\t},\n\n\ttweener: function( props, callback ) {\n\t\tif ( isFunction( props ) ) {\n\t\t\tcallback = props;\n\t\t\tprops = [ \"*\" ];\n\t\t} else {\n\t\t\tprops = props.match( rnothtmlwhite );\n\t\t}\n\n\t\tvar prop,\n\t\t\tindex = 0,\n\t\t\tlength = props.length;\n\n\t\tfor ( ; index < length; index++ ) {\n\t\t\tprop = props[ index ];\n\t\t\tAnimation.tweeners[ prop ] = Animation.tweeners[ prop ] || [];\n\t\t\tAnimation.tweeners[ prop ].unshift( callback );\n\t\t}\n\t},\n\n\tprefilters: [ defaultPrefilter ],\n\n\tprefilter: function( callback, prepend ) {\n\t\tif ( prepend ) {\n\t\t\tAnimation.prefilters.unshift( callback );\n\t\t} else {\n\t\t\tAnimation.prefilters.push( callback );\n\t\t}\n\t}\n} );\n\njQuery.speed = function( speed, easing, fn ) {\n\tvar opt = speed && typeof speed === \"object\" ? jQuery.extend( {}, speed ) : {\n\t\tcomplete: fn || !fn && easing ||\n\t\t\tisFunction( speed ) && speed,\n\t\tduration: speed,\n\t\teasing: fn && easing || easing && !isFunction( easing ) && easing\n\t};\n\n\t// Go to the end state if fx are off\n\tif ( jQuery.fx.off ) {\n\t\topt.duration = 0;\n\n\t} else {\n\t\tif ( typeof opt.duration !== \"number\" ) {\n\t\t\tif ( opt.duration in jQuery.fx.speeds ) {\n\t\t\t\topt.duration = jQuery.fx.speeds[ opt.duration ];\n\n\t\t\t} else {\n\t\t\t\topt.duration = jQuery.fx.speeds._default;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Normalize opt.queue - true/undefined/null -> \"fx\"\n\tif ( opt.queue == null || opt.queue === true ) {\n\t\topt.queue = \"fx\";\n\t}\n\n\t// Queueing\n\topt.old = opt.complete;\n\n\topt.complete = function() {\n\t\tif ( isFunction( opt.old ) ) {\n\t\t\topt.old.call( this );\n\t\t}\n\n\t\tif ( opt.queue ) {\n\t\t\tjQuery.dequeue( this, opt.queue );\n\t\t}\n\t};\n\n\treturn opt;\n};\n\njQuery.fn.extend( {\n\tfadeTo: function( speed, to, easing, callback ) {\n\n\t\t// Show any hidden elements after setting opacity to 0\n\t\treturn this.filter( isHiddenWithinTree ).css( \"opacity\", 0 ).show()\n\n\t\t\t// Animate to the value specified\n\t\t\t.end().animate( { opacity: to }, speed, easing, callback );\n\t},\n\tanimate: function( prop, speed, easing, callback ) {\n\t\tvar empty = jQuery.isEmptyObject( prop ),\n\t\t\toptall = jQuery.speed( speed, easing, callback ),\n\t\t\tdoAnimation = function() {\n\n\t\t\t\t// Operate on a copy of prop so per-property easing won't be lost\n\t\t\t\tvar anim = Animation( this, jQuery.extend( {}, prop ), optall );\n\n\t\t\t\t// Empty animations, or finishing resolves immediately\n\t\t\t\tif ( empty || dataPriv.get( this, \"finish\" ) ) {\n\t\t\t\t\tanim.stop( true );\n\t\t\t\t}\n\t\t\t};\n\t\t\tdoAnimation.finish = doAnimation;\n\n\t\treturn empty || optall.queue === false ?\n\t\t\tthis.each( doAnimation ) :\n\t\t\tthis.queue( optall.queue, doAnimation );\n\t},\n\tstop: function( type, clearQueue, gotoEnd ) {\n\t\tvar stopQueue = function( hooks ) {\n\t\t\tvar stop = hooks.stop;\n\t\t\tdelete hooks.stop;\n\t\t\tstop( gotoEnd );\n\t\t};\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tgotoEnd = clearQueue;\n\t\t\tclearQueue = type;\n\t\t\ttype = undefined;\n\t\t}\n\t\tif ( clearQueue && type !== false ) {\n\t\t\tthis.queue( type || \"fx\", [] );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar dequeue = true,\n\t\t\t\tindex = type != null && type + \"queueHooks\",\n\t\t\t\ttimers = jQuery.timers,\n\t\t\t\tdata = dataPriv.get( this );\n\n\t\t\tif ( index ) {\n\t\t\t\tif ( data[ index ] && data[ index ].stop ) {\n\t\t\t\t\tstopQueue( data[ index ] );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tfor ( index in data ) {\n\t\t\t\t\tif ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {\n\t\t\t\t\t\tstopQueue( data[ index ] );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfor ( index = timers.length; index--; ) {\n\t\t\t\tif ( timers[ index ].elem === this &&\n\t\t\t\t\t( type == null || timers[ index ].queue === type ) ) {\n\n\t\t\t\t\ttimers[ index ].anim.stop( gotoEnd );\n\t\t\t\t\tdequeue = false;\n\t\t\t\t\ttimers.splice( index, 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start the next in the queue if the last step wasn't forced.\n\t\t\t// Timers currently will call their complete callbacks, which\n\t\t\t// will dequeue but only if they were gotoEnd.\n\t\t\tif ( dequeue || !gotoEnd ) {\n\t\t\t\tjQuery.dequeue( this, type );\n\t\t\t}\n\t\t} );\n\t},\n\tfinish: function( type ) {\n\t\tif ( type !== false ) {\n\t\t\ttype = type || \"fx\";\n\t\t}\n\t\treturn this.each( function() {\n\t\t\tvar index,\n\t\t\t\tdata = dataPriv.get( this ),\n\t\t\t\tqueue = data[ type + \"queue\" ],\n\t\t\t\thooks = data[ type + \"queueHooks\" ],\n\t\t\t\ttimers = jQuery.timers,\n\t\t\t\tlength = queue ? queue.length : 0;\n\n\t\t\t// Enable finishing flag on private data\n\t\t\tdata.finish = true;\n\n\t\t\t// Empty the queue first\n\t\t\tjQuery.queue( this, type, [] );\n\n\t\t\tif ( hooks && hooks.stop ) {\n\t\t\t\thooks.stop.call( this, true );\n\t\t\t}\n\n\t\t\t// Look for any active animations, and finish them\n\t\t\tfor ( index = timers.length; index--; ) {\n\t\t\t\tif ( timers[ index ].elem === this && timers[ index ].queue === type ) {\n\t\t\t\t\ttimers[ index ].anim.stop( true );\n\t\t\t\t\ttimers.splice( index, 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Look for any animations in the old queue and finish them\n\t\t\tfor ( index = 0; index < length; index++ ) {\n\t\t\t\tif ( queue[ index ] && queue[ index ].finish ) {\n\t\t\t\t\tqueue[ index ].finish.call( this );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Turn off finishing flag\n\t\t\tdelete data.finish;\n\t\t} );\n\t}\n} );\n\njQuery.each( [ \"toggle\", \"show\", \"hide\" ], function( i, name ) {\n\tvar cssFn = jQuery.fn[ name ];\n\tjQuery.fn[ name ] = function( speed, easing, callback ) {\n\t\treturn speed == null || typeof speed === \"boolean\" ?\n\t\t\tcssFn.apply( this, arguments ) :\n\t\t\tthis.animate( genFx( name, true ), speed, easing, callback );\n\t};\n} );\n\n// Generate shortcuts for custom animations\njQuery.each( {\n\tslideDown: genFx( \"show\" ),\n\tslideUp: genFx( \"hide\" ),\n\tslideToggle: genFx( \"toggle\" ),\n\tfadeIn: { opacity: \"show\" },\n\tfadeOut: { opacity: \"hide\" },\n\tfadeToggle: { opacity: \"toggle\" }\n}, function( name, props ) {\n\tjQuery.fn[ name ] = function( speed, easing, callback ) {\n\t\treturn this.animate( props, speed, easing, callback );\n\t};\n} );\n\njQuery.timers = [];\njQuery.fx.tick = function() {\n\tvar timer,\n\t\ti = 0,\n\t\ttimers = jQuery.timers;\n\n\tfxNow = Date.now();\n\n\tfor ( ; i < timers.length; i++ ) {\n\t\ttimer = timers[ i ];\n\n\t\t// Run the timer and safely remove it when done (allowing for external removal)\n\t\tif ( !timer() && timers[ i ] === timer ) {\n\t\t\ttimers.splice( i--, 1 );\n\t\t}\n\t}\n\n\tif ( !timers.length ) {\n\t\tjQuery.fx.stop();\n\t}\n\tfxNow = undefined;\n};\n\njQuery.fx.timer = function( timer ) {\n\tjQuery.timers.push( timer );\n\tjQuery.fx.start();\n};\n\njQuery.fx.interval = 13;\njQuery.fx.start = function() {\n\tif ( inProgress ) {\n\t\treturn;\n\t}\n\n\tinProgress = true;\n\tschedule();\n};\n\njQuery.fx.stop = function() {\n\tinProgress = null;\n};\n\njQuery.fx.speeds = {\n\tslow: 600,\n\tfast: 200,\n\n\t// Default speed\n\t_default: 400\n};\n\n\n// Based off of the plugin by Clint Helfers, with permission.\n// https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/\njQuery.fn.delay = function( time, type ) {\n\ttime = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;\n\ttype = type || \"fx\";\n\n\treturn this.queue( type, function( next, hooks ) {\n\t\tvar timeout = window.setTimeout( next, time );\n\t\thooks.stop = function() {\n\t\t\twindow.clearTimeout( timeout );\n\t\t};\n\t} );\n};\n\n\n( function() {\n\tvar input = document.createElement( \"input\" ),\n\t\tselect = document.createElement( \"select\" ),\n\t\topt = select.appendChild( document.createElement( \"option\" ) );\n\n\tinput.type = \"checkbox\";\n\n\t// Support: Android <=4.3 only\n\t// Default value for a checkbox should be \"on\"\n\tsupport.checkOn = input.value !== \"\";\n\n\t// Support: IE <=11 only\n\t// Must access selectedIndex to make default options select\n\tsupport.optSelected = opt.selected;\n\n\t// Support: IE <=11 only\n\t// An input loses its value after becoming a radio\n\tinput = document.createElement( \"input\" );\n\tinput.value = \"t\";\n\tinput.type = \"radio\";\n\tsupport.radioValue = input.value === \"t\";\n} )();\n\n\nvar boolHook,\n\tattrHandle = jQuery.expr.attrHandle;\n\njQuery.fn.extend( {\n\tattr: function( name, value ) {\n\t\treturn access( this, jQuery.attr, name, value, arguments.length > 1 );\n\t},\n\n\tremoveAttr: function( name ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.removeAttr( this, name );\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tattr: function( elem, name, value ) {\n\t\tvar ret, hooks,\n\t\t\tnType = elem.nodeType;\n\n\t\t// Don't get/set attributes on text, comment and attribute nodes\n\t\tif ( nType === 3 || nType === 8 || nType === 2 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Fallback to prop when attributes are not supported\n\t\tif ( typeof elem.getAttribute === \"undefined\" ) {\n\t\t\treturn jQuery.prop( elem, name, value );\n\t\t}\n\n\t\t// Attribute hooks are determined by the lowercase version\n\t\t// Grab necessary hook if one is defined\n\t\tif ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {\n\t\t\thooks = jQuery.attrHooks[ name.toLowerCase() ] ||\n\t\t\t\t( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );\n\t\t}\n\n\t\tif ( value !== undefined ) {\n\t\t\tif ( value === null ) {\n\t\t\t\tjQuery.removeAttr( elem, name );\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( hooks && \"set\" in hooks &&\n\t\t\t\t( ret = hooks.set( elem, value, name ) ) !== undefined ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\telem.setAttribute( name, value + \"\" );\n\t\t\treturn value;\n\t\t}\n\n\t\tif ( hooks && \"get\" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {\n\t\t\treturn ret;\n\t\t}\n\n\t\tret = jQuery.find.attr( elem, name );\n\n\t\t// Non-existent attributes return null, we normalize to undefined\n\t\treturn ret == null ? undefined : ret;\n\t},\n\n\tattrHooks: {\n\t\ttype: {\n\t\t\tset: function( elem, value ) {\n\t\t\t\tif ( !support.radioValue && value === \"radio\" &&\n\t\t\t\t\tnodeName( elem, \"input\" ) ) {\n\t\t\t\t\tvar val = elem.value;\n\t\t\t\t\telem.setAttribute( \"type\", value );\n\t\t\t\t\tif ( val ) {\n\t\t\t\t\t\telem.value = val;\n\t\t\t\t\t}\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t},\n\n\tremoveAttr: function( elem, value ) {\n\t\tvar name,\n\t\t\ti = 0,\n\n\t\t\t// Attribute names can contain non-HTML whitespace characters\n\t\t\t// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2\n\t\t\tattrNames = value && value.match( rnothtmlwhite );\n\n\t\tif ( attrNames && elem.nodeType === 1 ) {\n\t\t\twhile ( ( name = attrNames[ i++ ] ) ) {\n\t\t\t\telem.removeAttribute( name );\n\t\t\t}\n\t\t}\n\t}\n} );\n\n// Hooks for boolean attributes\nboolHook = {\n\tset: function( elem, value, name ) {\n\t\tif ( value === false ) {\n\n\t\t\t// Remove boolean attributes when set to false\n\t\t\tjQuery.removeAttr( elem, name );\n\t\t} else {\n\t\t\telem.setAttribute( name, name );\n\t\t}\n\t\treturn name;\n\t}\n};\n\njQuery.each( jQuery.expr.match.bool.source.match( /\\w+/g ), function( i, name ) {\n\tvar getter = attrHandle[ name ] || jQuery.find.attr;\n\n\tattrHandle[ name ] = function( elem, name, isXML ) {\n\t\tvar ret, handle,\n\t\t\tlowercaseName = name.toLowerCase();\n\n\t\tif ( !isXML ) {\n\n\t\t\t// Avoid an infinite loop by temporarily removing this function from the getter\n\t\t\thandle = attrHandle[ lowercaseName ];\n\t\t\tattrHandle[ lowercaseName ] = ret;\n\t\t\tret = getter( elem, name, isXML ) != null ?\n\t\t\t\tlowercaseName :\n\t\t\t\tnull;\n\t\t\tattrHandle[ lowercaseName ] = handle;\n\t\t}\n\t\treturn ret;\n\t};\n} );\n\n\n\n\nvar rfocusable = /^(?:input|select|textarea|button)$/i,\n\trclickable = /^(?:a|area)$/i;\n\njQuery.fn.extend( {\n\tprop: function( name, value ) {\n\t\treturn access( this, jQuery.prop, name, value, arguments.length > 1 );\n\t},\n\n\tremoveProp: function( name ) {\n\t\treturn this.each( function() {\n\t\t\tdelete this[ jQuery.propFix[ name ] || name ];\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tprop: function( elem, name, value ) {\n\t\tvar ret, hooks,\n\t\t\tnType = elem.nodeType;\n\n\t\t// Don't get/set properties on text, comment and attribute nodes\n\t\tif ( nType === 3 || nType === 8 || nType === 2 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {\n\n\t\t\t// Fix name and attach hooks\n\t\t\tname = jQuery.propFix[ name ] || name;\n\t\t\thooks = jQuery.propHooks[ name ];\n\t\t}\n\n\t\tif ( value !== undefined ) {\n\t\t\tif ( hooks && \"set\" in hooks &&\n\t\t\t\t( ret = hooks.set( elem, value, name ) ) !== undefined ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\treturn ( elem[ name ] = value );\n\t\t}\n\n\t\tif ( hooks && \"get\" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {\n\t\t\treturn ret;\n\t\t}\n\n\t\treturn elem[ name ];\n\t},\n\n\tpropHooks: {\n\t\ttabIndex: {\n\t\t\tget: function( elem ) {\n\n\t\t\t\t// Support: IE <=9 - 11 only\n\t\t\t\t// elem.tabIndex doesn't always return the\n\t\t\t\t// correct value when it hasn't been explicitly set\n\t\t\t\t// https://web.archive.org/web/20141116233347/http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/\n\t\t\t\t// Use proper attribute retrieval(#12072)\n\t\t\t\tvar tabindex = jQuery.find.attr( elem, \"tabindex\" );\n\n\t\t\t\tif ( tabindex ) {\n\t\t\t\t\treturn parseInt( tabindex, 10 );\n\t\t\t\t}\n\n\t\t\t\tif (\n\t\t\t\t\trfocusable.test( elem.nodeName ) ||\n\t\t\t\t\trclickable.test( elem.nodeName ) &&\n\t\t\t\t\telem.href\n\t\t\t\t) {\n\t\t\t\t\treturn 0;\n\t\t\t\t}\n\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}\n\t},\n\n\tpropFix: {\n\t\t\"for\": \"htmlFor\",\n\t\t\"class\": \"className\"\n\t}\n} );\n\n// Support: IE <=11 only\n// Accessing the selectedIndex property\n// forces the browser to respect setting selected\n// on the option\n// The getter ensures a default option is selected\n// when in an optgroup\n// eslint rule \"no-unused-expressions\" is disabled for this code\n// since it considers such accessions noop\nif ( !support.optSelected ) {\n\tjQuery.propHooks.selected = {\n\t\tget: function( elem ) {\n\n\t\t\t/* eslint no-unused-expressions: \"off\" */\n\n\t\t\tvar parent = elem.parentNode;\n\t\t\tif ( parent && parent.parentNode ) {\n\t\t\t\tparent.parentNode.selectedIndex;\n\t\t\t}\n\t\t\treturn null;\n\t\t},\n\t\tset: function( elem ) {\n\n\t\t\t/* eslint no-unused-expressions: \"off\" */\n\n\t\t\tvar parent = elem.parentNode;\n\t\t\tif ( parent ) {\n\t\t\t\tparent.selectedIndex;\n\n\t\t\t\tif ( parent.parentNode ) {\n\t\t\t\t\tparent.parentNode.selectedIndex;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\njQuery.each( [\n\t\"tabIndex\",\n\t\"readOnly\",\n\t\"maxLength\",\n\t\"cellSpacing\",\n\t\"cellPadding\",\n\t\"rowSpan\",\n\t\"colSpan\",\n\t\"useMap\",\n\t\"frameBorder\",\n\t\"contentEditable\"\n], function() {\n\tjQuery.propFix[ this.toLowerCase() ] = this;\n} );\n\n\n\n\n\t// Strip and collapse whitespace according to HTML spec\n\t// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace\n\tfunction stripAndCollapse( value ) {\n\t\tvar tokens = value.match( rnothtmlwhite ) || [];\n\t\treturn tokens.join( \" \" );\n\t}\n\n\nfunction getClass( elem ) {\n\treturn elem.getAttribute && elem.getAttribute( \"class\" ) || \"\";\n}\n\nfunction classesToArray( value ) {\n\tif ( Array.isArray( value ) ) {\n\t\treturn value;\n\t}\n\tif ( typeof value === \"string\" ) {\n\t\treturn value.match( rnothtmlwhite ) || [];\n\t}\n\treturn [];\n}\n\njQuery.fn.extend( {\n\taddClass: function( value ) {\n\t\tvar classes, elem, cur, curValue, clazz, j, finalValue,\n\t\t\ti = 0;\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( j ) {\n\t\t\t\tjQuery( this ).addClass( value.call( this, j, getClass( this ) ) );\n\t\t\t} );\n\t\t}\n\n\t\tclasses = classesToArray( value );\n\n\t\tif ( classes.length ) {\n\t\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\t\tcurValue = getClass( elem );\n\t\t\t\tcur = elem.nodeType === 1 && ( \" \" + stripAndCollapse( curValue ) + \" \" );\n\n\t\t\t\tif ( cur ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\twhile ( ( clazz = classes[ j++ ] ) ) {\n\t\t\t\t\t\tif ( cur.indexOf( \" \" + clazz + \" \" ) < 0 ) {\n\t\t\t\t\t\t\tcur += clazz + \" \";\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Only assign if different to avoid unneeded rendering.\n\t\t\t\t\tfinalValue = stripAndCollapse( cur );\n\t\t\t\t\tif ( curValue !== finalValue ) {\n\t\t\t\t\t\telem.setAttribute( \"class\", finalValue );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\tremoveClass: function( value ) {\n\t\tvar classes, elem, cur, curValue, clazz, j, finalValue,\n\t\t\ti = 0;\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( j ) {\n\t\t\t\tjQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );\n\t\t\t} );\n\t\t}\n\n\t\tif ( !arguments.length ) {\n\t\t\treturn this.attr( \"class\", \"\" );\n\t\t}\n\n\t\tclasses = classesToArray( value );\n\n\t\tif ( classes.length ) {\n\t\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\t\tcurValue = getClass( elem );\n\n\t\t\t\t// This expression is here for better compressibility (see addClass)\n\t\t\t\tcur = elem.nodeType === 1 && ( \" \" + stripAndCollapse( curValue ) + \" \" );\n\n\t\t\t\tif ( cur ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\twhile ( ( clazz = classes[ j++ ] ) ) {\n\n\t\t\t\t\t\t// Remove *all* instances\n\t\t\t\t\t\twhile ( cur.indexOf( \" \" + clazz + \" \" ) > -1 ) {\n\t\t\t\t\t\t\tcur = cur.replace( \" \" + clazz + \" \", \" \" );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Only assign if different to avoid unneeded rendering.\n\t\t\t\t\tfinalValue = stripAndCollapse( cur );\n\t\t\t\t\tif ( curValue !== finalValue ) {\n\t\t\t\t\t\telem.setAttribute( \"class\", finalValue );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\ttoggleClass: function( value, stateVal ) {\n\t\tvar type = typeof value,\n\t\t\tisValidValue = type === \"string\" || Array.isArray( value );\n\n\t\tif ( typeof stateVal === \"boolean\" && isValidValue ) {\n\t\t\treturn stateVal ? this.addClass( value ) : this.removeClass( value );\n\t\t}\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( i ) {\n\t\t\t\tjQuery( this ).toggleClass(\n\t\t\t\t\tvalue.call( this, i, getClass( this ), stateVal ),\n\t\t\t\t\tstateVal\n\t\t\t\t);\n\t\t\t} );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar className, i, self, classNames;\n\n\t\t\tif ( isValidValue ) {\n\n\t\t\t\t// Toggle individual class names\n\t\t\t\ti = 0;\n\t\t\t\tself = jQuery( this );\n\t\t\t\tclassNames = classesToArray( value );\n\n\t\t\t\twhile ( ( className = classNames[ i++ ] ) ) {\n\n\t\t\t\t\t// Check each className given, space separated list\n\t\t\t\t\tif ( self.hasClass( className ) ) {\n\t\t\t\t\t\tself.removeClass( className );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tself.addClass( className );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t// Toggle whole class name\n\t\t\t} else if ( value === undefined || type === \"boolean\" ) {\n\t\t\t\tclassName = getClass( this );\n\t\t\t\tif ( className ) {\n\n\t\t\t\t\t// Store className if set\n\t\t\t\t\tdataPriv.set( this, \"__className__\", className );\n\t\t\t\t}\n\n\t\t\t\t// If the element has a class name or if we're passed `false`,\n\t\t\t\t// then remove the whole classname (if there was one, the above saved it).\n\t\t\t\t// Otherwise bring back whatever was previously saved (if anything),\n\t\t\t\t// falling back to the empty string if nothing was stored.\n\t\t\t\tif ( this.setAttribute ) {\n\t\t\t\t\tthis.setAttribute( \"class\",\n\t\t\t\t\t\tclassName || value === false ?\n\t\t\t\t\t\t\"\" :\n\t\t\t\t\t\tdataPriv.get( this, \"__className__\" ) || \"\"\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t},\n\n\thasClass: function( selector ) {\n\t\tvar className, elem,\n\t\t\ti = 0;\n\n\t\tclassName = \" \" + selector + \" \";\n\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\tif ( elem.nodeType === 1 &&\n\t\t\t\t( \" \" + stripAndCollapse( getClass( elem ) ) + \" \" ).indexOf( className ) > -1 ) {\n\t\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n} );\n\n\n\n\nvar rreturn = /\\r/g;\n\njQuery.fn.extend( {\n\tval: function( value ) {\n\t\tvar hooks, ret, valueIsFunction,\n\t\t\telem = this[ 0 ];\n\n\t\tif ( !arguments.length ) {\n\t\t\tif ( elem ) {\n\t\t\t\thooks = jQuery.valHooks[ elem.type ] ||\n\t\t\t\t\tjQuery.valHooks[ elem.nodeName.toLowerCase() ];\n\n\t\t\t\tif ( hooks &&\n\t\t\t\t\t\"get\" in hooks &&\n\t\t\t\t\t( ret = hooks.get( elem, \"value\" ) ) !== undefined\n\t\t\t\t) {\n\t\t\t\t\treturn ret;\n\t\t\t\t}\n\n\t\t\t\tret = elem.value;\n\n\t\t\t\t// Handle most common string cases\n\t\t\t\tif ( typeof ret === \"string\" ) {\n\t\t\t\t\treturn ret.replace( rreturn, \"\" );\n\t\t\t\t}\n\n\t\t\t\t// Handle cases where value is null/undef or number\n\t\t\t\treturn ret == null ? \"\" : ret;\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\tvalueIsFunction = isFunction( value );\n\n\t\treturn this.each( function( i ) {\n\t\t\tvar val;\n\n\t\t\tif ( this.nodeType !== 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( valueIsFunction ) {\n\t\t\t\tval = value.call( this, i, jQuery( this ).val() );\n\t\t\t} else {\n\t\t\t\tval = value;\n\t\t\t}\n\n\t\t\t// Treat null/undefined as \"\"; convert numbers to string\n\t\t\tif ( val == null ) {\n\t\t\t\tval = \"\";\n\n\t\t\t} else if ( typeof val === \"number\" ) {\n\t\t\t\tval += \"\";\n\n\t\t\t} else if ( Array.isArray( val ) ) {\n\t\t\t\tval = jQuery.map( val, function( value ) {\n\t\t\t\t\treturn value == null ? \"\" : value + \"\";\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\thooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];\n\n\t\t\t// If set returns undefined, fall back to normal setting\n\t\t\tif ( !hooks || !( \"set\" in hooks ) || hooks.set( this, val, \"value\" ) === undefined ) {\n\t\t\t\tthis.value = val;\n\t\t\t}\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tvalHooks: {\n\t\toption: {\n\t\t\tget: function( elem ) {\n\n\t\t\t\tvar val = jQuery.find.attr( elem, \"value\" );\n\t\t\t\treturn val != null ?\n\t\t\t\t\tval :\n\n\t\t\t\t\t// Support: IE <=10 - 11 only\n\t\t\t\t\t// option.text throws exceptions (#14686, #14858)\n\t\t\t\t\t// Strip and collapse whitespace\n\t\t\t\t\t// https://html.spec.whatwg.org/#strip-and-collapse-whitespace\n\t\t\t\t\tstripAndCollapse( jQuery.text( elem ) );\n\t\t\t}\n\t\t},\n\t\tselect: {\n\t\t\tget: function( elem ) {\n\t\t\t\tvar value, option, i,\n\t\t\t\t\toptions = elem.options,\n\t\t\t\t\tindex = elem.selectedIndex,\n\t\t\t\t\tone = elem.type === \"select-one\",\n\t\t\t\t\tvalues = one ? null : [],\n\t\t\t\t\tmax = one ? index + 1 : options.length;\n\n\t\t\t\tif ( index < 0 ) {\n\t\t\t\t\ti = max;\n\n\t\t\t\t} else {\n\t\t\t\t\ti = one ? index : 0;\n\t\t\t\t}\n\n\t\t\t\t// Loop through all the selected options\n\t\t\t\tfor ( ; i < max; i++ ) {\n\t\t\t\t\toption = options[ i ];\n\n\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t// IE8-9 doesn't update selected after form reset (#2551)\n\t\t\t\t\tif ( ( option.selected || i === index ) &&\n\n\t\t\t\t\t\t\t// Don't return options that are disabled or in a disabled optgroup\n\t\t\t\t\t\t\t!option.disabled &&\n\t\t\t\t\t\t\t( !option.parentNode.disabled ||\n\t\t\t\t\t\t\t\t!nodeName( option.parentNode, \"optgroup\" ) ) ) {\n\n\t\t\t\t\t\t// Get the specific value for the option\n\t\t\t\t\t\tvalue = jQuery( option ).val();\n\n\t\t\t\t\t\t// We don't need an array for one selects\n\t\t\t\t\t\tif ( one ) {\n\t\t\t\t\t\t\treturn value;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Multi-Selects return an array\n\t\t\t\t\t\tvalues.push( value );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn values;\n\t\t\t},\n\n\t\t\tset: function( elem, value ) {\n\t\t\t\tvar optionSet, option,\n\t\t\t\t\toptions = elem.options,\n\t\t\t\t\tvalues = jQuery.makeArray( value ),\n\t\t\t\t\ti = options.length;\n\n\t\t\t\twhile ( i-- ) {\n\t\t\t\t\toption = options[ i ];\n\n\t\t\t\t\t/* eslint-disable no-cond-assign */\n\n\t\t\t\t\tif ( option.selected =\n\t\t\t\t\t\tjQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1\n\t\t\t\t\t) {\n\t\t\t\t\t\toptionSet = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t/* eslint-enable no-cond-assign */\n\t\t\t\t}\n\n\t\t\t\t// Force browsers to behave consistently when non-matching value is set\n\t\t\t\tif ( !optionSet ) {\n\t\t\t\t\telem.selectedIndex = -1;\n\t\t\t\t}\n\t\t\t\treturn values;\n\t\t\t}\n\t\t}\n\t}\n} );\n\n// Radios and checkboxes getter/setter\njQuery.each( [ \"radio\", \"checkbox\" ], function() {\n\tjQuery.valHooks[ this ] = {\n\t\tset: function( elem, value ) {\n\t\t\tif ( Array.isArray( value ) ) {\n\t\t\t\treturn ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );\n\t\t\t}\n\t\t}\n\t};\n\tif ( !support.checkOn ) {\n\t\tjQuery.valHooks[ this ].get = function( elem ) {\n\t\t\treturn elem.getAttribute( \"value\" ) === null ? \"on\" : elem.value;\n\t\t};\n\t}\n} );\n\n\n\n\n// Return jQuery for attributes-only inclusion\n\n\nsupport.focusin = \"onfocusin\" in window;\n\n\nvar rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,\n\tstopPropagationCallback = function( e ) {\n\t\te.stopPropagation();\n\t};\n\njQuery.extend( jQuery.event, {\n\n\ttrigger: function( event, data, elem, onlyHandlers ) {\n\n\t\tvar i, cur, tmp, bubbleType, ontype, handle, special, lastElement,\n\t\t\teventPath = [ elem || document ],\n\t\t\ttype = hasOwn.call( event, \"type\" ) ? event.type : event,\n\t\t\tnamespaces = hasOwn.call( event, \"namespace\" ) ? event.namespace.split( \".\" ) : [];\n\n\t\tcur = lastElement = tmp = elem = elem || document;\n\n\t\t// Don't do events on text and comment nodes\n\t\tif ( elem.nodeType === 3 || elem.nodeType === 8 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// focus/blur morphs to focusin/out; ensure we're not firing them right now\n\t\tif ( rfocusMorph.test( type + jQuery.event.triggered ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( type.indexOf( \".\" ) > -1 ) {\n\n\t\t\t// Namespaced trigger; create a regexp to match event type in handle()\n\t\t\tnamespaces = type.split( \".\" );\n\t\t\ttype = namespaces.shift();\n\t\t\tnamespaces.sort();\n\t\t}\n\t\tontype = type.indexOf( \":\" ) < 0 && \"on\" + type;\n\n\t\t// Caller can pass in a jQuery.Event object, Object, or just an event type string\n\t\tevent = event[ jQuery.expando ] ?\n\t\t\tevent :\n\t\t\tnew jQuery.Event( type, typeof event === \"object\" && event );\n\n\t\t// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)\n\t\tevent.isTrigger = onlyHandlers ? 2 : 3;\n\t\tevent.namespace = namespaces.join( \".\" );\n\t\tevent.rnamespace = event.namespace ?\n\t\t\tnew RegExp( \"(^|\\\\.)\" + namespaces.join( \"\\\\.(?:.*\\\\.|)\" ) + \"(\\\\.|$)\" ) :\n\t\t\tnull;\n\n\t\t// Clean up the event in case it is being reused\n\t\tevent.result = undefined;\n\t\tif ( !event.target ) {\n\t\t\tevent.target = elem;\n\t\t}\n\n\t\t// Clone any incoming data and prepend the event, creating the handler arg list\n\t\tdata = data == null ?\n\t\t\t[ event ] :\n\t\t\tjQuery.makeArray( data, [ event ] );\n\n\t\t// Allow special events to draw outside the lines\n\t\tspecial = jQuery.event.special[ type ] || {};\n\t\tif ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Determine event propagation path in advance, per W3C events spec (#9951)\n\t\t// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)\n\t\tif ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {\n\n\t\t\tbubbleType = special.delegateType || type;\n\t\t\tif ( !rfocusMorph.test( bubbleType + type ) ) {\n\t\t\t\tcur = cur.parentNode;\n\t\t\t}\n\t\t\tfor ( ; cur; cur = cur.parentNode ) {\n\t\t\t\teventPath.push( cur );\n\t\t\t\ttmp = cur;\n\t\t\t}\n\n\t\t\t// Only add window if we got to document (e.g., not plain obj or detached DOM)\n\t\t\tif ( tmp === ( elem.ownerDocument || document ) ) {\n\t\t\t\teventPath.push( tmp.defaultView || tmp.parentWindow || window );\n\t\t\t}\n\t\t}\n\n\t\t// Fire handlers on the event path\n\t\ti = 0;\n\t\twhile ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {\n\t\t\tlastElement = cur;\n\t\t\tevent.type = i > 1 ?\n\t\t\t\tbubbleType :\n\t\t\t\tspecial.bindType || type;\n\n\t\t\t// jQuery handler\n\t\t\thandle = ( dataPriv.get( cur, \"events\" ) || {} )[ event.type ] &&\n\t\t\t\tdataPriv.get( cur, \"handle\" );\n\t\t\tif ( handle ) {\n\t\t\t\thandle.apply( cur, data );\n\t\t\t}\n\n\t\t\t// Native handler\n\t\t\thandle = ontype && cur[ ontype ];\n\t\t\tif ( handle && handle.apply && acceptData( cur ) ) {\n\t\t\t\tevent.result = handle.apply( cur, data );\n\t\t\t\tif ( event.result === false ) {\n\t\t\t\t\tevent.preventDefault();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tevent.type = type;\n\n\t\t// If nobody prevented the default action, do it now\n\t\tif ( !onlyHandlers && !event.isDefaultPrevented() ) {\n\n\t\t\tif ( ( !special._default ||\n\t\t\t\tspecial._default.apply( eventPath.pop(), data ) === false ) &&\n\t\t\t\tacceptData( elem ) ) {\n\n\t\t\t\t// Call a native DOM method on the target with the same name as the event.\n\t\t\t\t// Don't do default actions on window, that's where global variables be (#6170)\n\t\t\t\tif ( ontype && isFunction( elem[ type ] ) && !isWindow( elem ) ) {\n\n\t\t\t\t\t// Don't re-trigger an onFOO event when we call its FOO() method\n\t\t\t\t\ttmp = elem[ ontype ];\n\n\t\t\t\t\tif ( tmp ) {\n\t\t\t\t\t\telem[ ontype ] = null;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Prevent re-triggering of the same event, since we already bubbled it above\n\t\t\t\t\tjQuery.event.triggered = type;\n\n\t\t\t\t\tif ( event.isPropagationStopped() ) {\n\t\t\t\t\t\tlastElement.addEventListener( type, stopPropagationCallback );\n\t\t\t\t\t}\n\n\t\t\t\t\telem[ type ]();\n\n\t\t\t\t\tif ( event.isPropagationStopped() ) {\n\t\t\t\t\t\tlastElement.removeEventListener( type, stopPropagationCallback );\n\t\t\t\t\t}\n\n\t\t\t\t\tjQuery.event.triggered = undefined;\n\n\t\t\t\t\tif ( tmp ) {\n\t\t\t\t\t\telem[ ontype ] = tmp;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn event.result;\n\t},\n\n\t// Piggyback on a donor event to simulate a different one\n\t// Used only for `focus(in | out)` events\n\tsimulate: function( type, elem, event ) {\n\t\tvar e = jQuery.extend(\n\t\t\tnew jQuery.Event(),\n\t\t\tevent,\n\t\t\t{\n\t\t\t\ttype: type,\n\t\t\t\tisSimulated: true\n\t\t\t}\n\t\t);\n\n\t\tjQuery.event.trigger( e, null, elem );\n\t}\n\n} );\n\njQuery.fn.extend( {\n\n\ttrigger: function( type, data ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.event.trigger( type, data, this );\n\t\t} );\n\t},\n\ttriggerHandler: function( type, data ) {\n\t\tvar elem = this[ 0 ];\n\t\tif ( elem ) {\n\t\t\treturn jQuery.event.trigger( type, data, elem, true );\n\t\t}\n\t}\n} );\n\n\n// Support: Firefox <=44\n// Firefox doesn't have focus(in | out) events\n// Related ticket - https://bugzilla.mozilla.org/show_bug.cgi?id=687787\n//\n// Support: Chrome <=48 - 49, Safari <=9.0 - 9.1\n// focus(in | out) events fire after focus & blur events,\n// which is spec violation - http://www.w3.org/TR/DOM-Level-3-Events/#events-focusevent-event-order\n// Related ticket - https://bugs.chromium.org/p/chromium/issues/detail?id=449857\nif ( !support.focusin ) {\n\tjQuery.each( { focus: \"focusin\", blur: \"focusout\" }, function( orig, fix ) {\n\n\t\t// Attach a single capturing handler on the document while someone wants focusin/focusout\n\t\tvar handler = function( event ) {\n\t\t\tjQuery.event.simulate( fix, event.target, jQuery.event.fix( event ) );\n\t\t};\n\n\t\tjQuery.event.special[ fix ] = {\n\t\t\tsetup: function() {\n\t\t\t\tvar doc = this.ownerDocument || this,\n\t\t\t\t\tattaches = dataPriv.access( doc, fix );\n\n\t\t\t\tif ( !attaches ) {\n\t\t\t\t\tdoc.addEventListener( orig, handler, true );\n\t\t\t\t}\n\t\t\t\tdataPriv.access( doc, fix, ( attaches || 0 ) + 1 );\n\t\t\t},\n\t\t\tteardown: function() {\n\t\t\t\tvar doc = this.ownerDocument || this,\n\t\t\t\t\tattaches = dataPriv.access( doc, fix ) - 1;\n\n\t\t\t\tif ( !attaches ) {\n\t\t\t\t\tdoc.removeEventListener( orig, handler, true );\n\t\t\t\t\tdataPriv.remove( doc, fix );\n\n\t\t\t\t} else {\n\t\t\t\t\tdataPriv.access( doc, fix, attaches );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t} );\n}\nvar location = window.location;\n\nvar nonce = Date.now();\n\nvar rquery = ( /\\?/ );\n\n\n\n// Cross-browser xml parsing\njQuery.parseXML = function( data ) {\n\tvar xml;\n\tif ( !data || typeof data !== \"string\" ) {\n\t\treturn null;\n\t}\n\n\t// Support: IE 9 - 11 only\n\t// IE throws on parseFromString with invalid input.\n\ttry {\n\t\txml = ( new window.DOMParser() ).parseFromString( data, \"text/xml\" );\n\t} catch ( e ) {\n\t\txml = undefined;\n\t}\n\n\tif ( !xml || xml.getElementsByTagName( \"parsererror\" ).length ) {\n\t\tjQuery.error( \"Invalid XML: \" + data );\n\t}\n\treturn xml;\n};\n\n\nvar\n\trbracket = /\\[\\]$/,\n\trCRLF = /\\r?\\n/g,\n\trsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,\n\trsubmittable = /^(?:input|select|textarea|keygen)/i;\n\nfunction buildParams( prefix, obj, traditional, add ) {\n\tvar name;\n\n\tif ( Array.isArray( obj ) ) {\n\n\t\t// Serialize array item.\n\t\tjQuery.each( obj, function( i, v ) {\n\t\t\tif ( traditional || rbracket.test( prefix ) ) {\n\n\t\t\t\t// Treat each array item as a scalar.\n\t\t\t\tadd( prefix, v );\n\n\t\t\t} else {\n\n\t\t\t\t// Item is non-scalar (array or object), encode its numeric index.\n\t\t\t\tbuildParams(\n\t\t\t\t\tprefix + \"[\" + ( typeof v === \"object\" && v != null ? i : \"\" ) + \"]\",\n\t\t\t\t\tv,\n\t\t\t\t\ttraditional,\n\t\t\t\t\tadd\n\t\t\t\t);\n\t\t\t}\n\t\t} );\n\n\t} else if ( !traditional && toType( obj ) === \"object\" ) {\n\n\t\t// Serialize object item.\n\t\tfor ( name in obj ) {\n\t\t\tbuildParams( prefix + \"[\" + name + \"]\", obj[ name ], traditional, add );\n\t\t}\n\n\t} else {\n\n\t\t// Serialize scalar item.\n\t\tadd( prefix, obj );\n\t}\n}\n\n// Serialize an array of form elements or a set of\n// key/values into a query string\njQuery.param = function( a, traditional ) {\n\tvar prefix,\n\t\ts = [],\n\t\tadd = function( key, valueOrFunction ) {\n\n\t\t\t// If value is a function, invoke it and use its return value\n\t\t\tvar value = isFunction( valueOrFunction ) ?\n\t\t\t\tvalueOrFunction() :\n\t\t\t\tvalueOrFunction;\n\n\t\t\ts[ s.length ] = encodeURIComponent( key ) + \"=\" +\n\t\t\t\tencodeURIComponent( value == null ? \"\" : value );\n\t\t};\n\n\tif ( a == null ) {\n\t\treturn \"\";\n\t}\n\n\t// If an array was passed in, assume that it is an array of form elements.\n\tif ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {\n\n\t\t// Serialize the form elements\n\t\tjQuery.each( a, function() {\n\t\t\tadd( this.name, this.value );\n\t\t} );\n\n\t} else {\n\n\t\t// If traditional, encode the \"old\" way (the way 1.3.2 or older\n\t\t// did it), otherwise encode params recursively.\n\t\tfor ( prefix in a ) {\n\t\t\tbuildParams( prefix, a[ prefix ], traditional, add );\n\t\t}\n\t}\n\n\t// Return the resulting serialization\n\treturn s.join( \"&\" );\n};\n\njQuery.fn.extend( {\n\tserialize: function() {\n\t\treturn jQuery.param( this.serializeArray() );\n\t},\n\tserializeArray: function() {\n\t\treturn this.map( function() {\n\n\t\t\t// Can add propHook for \"elements\" to filter or add form elements\n\t\t\tvar elements = jQuery.prop( this, \"elements\" );\n\t\t\treturn elements ? jQuery.makeArray( elements ) : this;\n\t\t} )\n\t\t.filter( function() {\n\t\t\tvar type = this.type;\n\n\t\t\t// Use .is( \":disabled\" ) so that fieldset[disabled] works\n\t\t\treturn this.name && !jQuery( this ).is( \":disabled\" ) &&\n\t\t\t\trsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&\n\t\t\t\t( this.checked || !rcheckableType.test( type ) );\n\t\t} )\n\t\t.map( function( i, elem ) {\n\t\t\tvar val = jQuery( this ).val();\n\n\t\t\tif ( val == null ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( Array.isArray( val ) ) {\n\t\t\t\treturn jQuery.map( val, function( val ) {\n\t\t\t\t\treturn { name: elem.name, value: val.replace( rCRLF, \"\\r\\n\" ) };\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn { name: elem.name, value: val.replace( rCRLF, \"\\r\\n\" ) };\n\t\t} ).get();\n\t}\n} );\n\n\nvar\n\tr20 = /%20/g,\n\trhash = /#.*$/,\n\trantiCache = /([?&])_=[^&]*/,\n\trheaders = /^(.*?):[ \\t]*([^\\r\\n]*)$/mg,\n\n\t// #7653, #8125, #8152: local protocol detection\n\trlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,\n\trnoContent = /^(?:GET|HEAD)$/,\n\trprotocol = /^\\/\\//,\n\n\t/* Prefilters\n\t * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)\n\t * 2) These are called:\n\t * - BEFORE asking for a transport\n\t * - AFTER param serialization (s.data is a string if s.processData is true)\n\t * 3) key is the dataType\n\t * 4) the catchall symbol \"*\" can be used\n\t * 5) execution will start with transport dataType and THEN continue down to \"*\" if needed\n\t */\n\tprefilters = {},\n\n\t/* Transports bindings\n\t * 1) key is the dataType\n\t * 2) the catchall symbol \"*\" can be used\n\t * 3) selection will start with transport dataType and THEN go to \"*\" if needed\n\t */\n\ttransports = {},\n\n\t// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression\n\tallTypes = \"*/\".concat( \"*\" ),\n\n\t// Anchor tag for parsing the document origin\n\toriginAnchor = document.createElement( \"a\" );\n\toriginAnchor.href = location.href;\n\n// Base \"constructor\" for jQuery.ajaxPrefilter and jQuery.ajaxTransport\nfunction addToPrefiltersOrTransports( structure ) {\n\n\t// dataTypeExpression is optional and defaults to \"*\"\n\treturn function( dataTypeExpression, func ) {\n\n\t\tif ( typeof dataTypeExpression !== \"string\" ) {\n\t\t\tfunc = dataTypeExpression;\n\t\t\tdataTypeExpression = \"*\";\n\t\t}\n\n\t\tvar dataType,\n\t\t\ti = 0,\n\t\t\tdataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];\n\n\t\tif ( isFunction( func ) ) {\n\n\t\t\t// For each dataType in the dataTypeExpression\n\t\t\twhile ( ( dataType = dataTypes[ i++ ] ) ) {\n\n\t\t\t\t// Prepend if requested\n\t\t\t\tif ( dataType[ 0 ] === \"+\" ) {\n\t\t\t\t\tdataType = dataType.slice( 1 ) || \"*\";\n\t\t\t\t\t( structure[ dataType ] = structure[ dataType ] || [] ).unshift( func );\n\n\t\t\t\t// Otherwise append\n\t\t\t\t} else {\n\t\t\t\t\t( structure[ dataType ] = structure[ dataType ] || [] ).push( func );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Base inspection function for prefilters and transports\nfunction inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {\n\n\tvar inspected = {},\n\t\tseekingTransport = ( structure === transports );\n\n\tfunction inspect( dataType ) {\n\t\tvar selected;\n\t\tinspected[ dataType ] = true;\n\t\tjQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {\n\t\t\tvar dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );\n\t\t\tif ( typeof dataTypeOrTransport === \"string\" &&\n\t\t\t\t!seekingTransport && !inspected[ dataTypeOrTransport ] ) {\n\n\t\t\t\toptions.dataTypes.unshift( dataTypeOrTransport );\n\t\t\t\tinspect( dataTypeOrTransport );\n\t\t\t\treturn false;\n\t\t\t} else if ( seekingTransport ) {\n\t\t\t\treturn !( selected = dataTypeOrTransport );\n\t\t\t}\n\t\t} );\n\t\treturn selected;\n\t}\n\n\treturn inspect( options.dataTypes[ 0 ] ) || !inspected[ \"*\" ] && inspect( \"*\" );\n}\n\n// A special extend for ajax options\n// that takes \"flat\" options (not to be deep extended)\n// Fixes #9887\nfunction ajaxExtend( target, src ) {\n\tvar key, deep,\n\t\tflatOptions = jQuery.ajaxSettings.flatOptions || {};\n\n\tfor ( key in src ) {\n\t\tif ( src[ key ] !== undefined ) {\n\t\t\t( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];\n\t\t}\n\t}\n\tif ( deep ) {\n\t\tjQuery.extend( true, target, deep );\n\t}\n\n\treturn target;\n}\n\n/* Handles responses to an ajax request:\n * - finds the right dataType (mediates between content-type and expected dataType)\n * - returns the corresponding response\n */\nfunction ajaxHandleResponses( s, jqXHR, responses ) {\n\n\tvar ct, type, finalDataType, firstDataType,\n\t\tcontents = s.contents,\n\t\tdataTypes = s.dataTypes;\n\n\t// Remove auto dataType and get content-type in the process\n\twhile ( dataTypes[ 0 ] === \"*\" ) {\n\t\tdataTypes.shift();\n\t\tif ( ct === undefined ) {\n\t\t\tct = s.mimeType || jqXHR.getResponseHeader( \"Content-Type\" );\n\t\t}\n\t}\n\n\t// Check if we're dealing with a known content-type\n\tif ( ct ) {\n\t\tfor ( type in contents ) {\n\t\t\tif ( contents[ type ] && contents[ type ].test( ct ) ) {\n\t\t\t\tdataTypes.unshift( type );\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Check to see if we have a response for the expected dataType\n\tif ( dataTypes[ 0 ] in responses ) {\n\t\tfinalDataType = dataTypes[ 0 ];\n\t} else {\n\n\t\t// Try convertible dataTypes\n\t\tfor ( type in responses ) {\n\t\t\tif ( !dataTypes[ 0 ] || s.converters[ type + \" \" + dataTypes[ 0 ] ] ) {\n\t\t\t\tfinalDataType = type;\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tif ( !firstDataType ) {\n\t\t\t\tfirstDataType = type;\n\t\t\t}\n\t\t}\n\n\t\t// Or just use first one\n\t\tfinalDataType = finalDataType || firstDataType;\n\t}\n\n\t// If we found a dataType\n\t// We add the dataType to the list if needed\n\t// and return the corresponding response\n\tif ( finalDataType ) {\n\t\tif ( finalDataType !== dataTypes[ 0 ] ) {\n\t\t\tdataTypes.unshift( finalDataType );\n\t\t}\n\t\treturn responses[ finalDataType ];\n\t}\n}\n\n/* Chain conversions given the request and the original response\n * Also sets the responseXXX fields on the jqXHR instance\n */\nfunction ajaxConvert( s, response, jqXHR, isSuccess ) {\n\tvar conv2, current, conv, tmp, prev,\n\t\tconverters = {},\n\n\t\t// Work with a copy of dataTypes in case we need to modify it for conversion\n\t\tdataTypes = s.dataTypes.slice();\n\n\t// Create converters map with lowercased keys\n\tif ( dataTypes[ 1 ] ) {\n\t\tfor ( conv in s.converters ) {\n\t\t\tconverters[ conv.toLowerCase() ] = s.converters[ conv ];\n\t\t}\n\t}\n\n\tcurrent = dataTypes.shift();\n\n\t// Convert to each sequential dataType\n\twhile ( current ) {\n\n\t\tif ( s.responseFields[ current ] ) {\n\t\t\tjqXHR[ s.responseFields[ current ] ] = response;\n\t\t}\n\n\t\t// Apply the dataFilter if provided\n\t\tif ( !prev && isSuccess && s.dataFilter ) {\n\t\t\tresponse = s.dataFilter( response, s.dataType );\n\t\t}\n\n\t\tprev = current;\n\t\tcurrent = dataTypes.shift();\n\n\t\tif ( current ) {\n\n\t\t\t// There's only work to do if current dataType is non-auto\n\t\t\tif ( current === \"*\" ) {\n\n\t\t\t\tcurrent = prev;\n\n\t\t\t// Convert response if prev dataType is non-auto and differs from current\n\t\t\t} else if ( prev !== \"*\" && prev !== current ) {\n\n\t\t\t\t// Seek a direct converter\n\t\t\t\tconv = converters[ prev + \" \" + current ] || converters[ \"* \" + current ];\n\n\t\t\t\t// If none found, seek a pair\n\t\t\t\tif ( !conv ) {\n\t\t\t\t\tfor ( conv2 in converters ) {\n\n\t\t\t\t\t\t// If conv2 outputs current\n\t\t\t\t\t\ttmp = conv2.split( \" \" );\n\t\t\t\t\t\tif ( tmp[ 1 ] === current ) {\n\n\t\t\t\t\t\t\t// If prev can be converted to accepted input\n\t\t\t\t\t\t\tconv = converters[ prev + \" \" + tmp[ 0 ] ] ||\n\t\t\t\t\t\t\t\tconverters[ \"* \" + tmp[ 0 ] ];\n\t\t\t\t\t\t\tif ( conv ) {\n\n\t\t\t\t\t\t\t\t// Condense equivalence converters\n\t\t\t\t\t\t\t\tif ( conv === true ) {\n\t\t\t\t\t\t\t\t\tconv = converters[ conv2 ];\n\n\t\t\t\t\t\t\t\t// Otherwise, insert the intermediate dataType\n\t\t\t\t\t\t\t\t} else if ( converters[ conv2 ] !== true ) {\n\t\t\t\t\t\t\t\t\tcurrent = tmp[ 0 ];\n\t\t\t\t\t\t\t\t\tdataTypes.unshift( tmp[ 1 ] );\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply converter (if not an equivalence)\n\t\t\t\tif ( conv !== true ) {\n\n\t\t\t\t\t// Unless errors are allowed to bubble, catch and return them\n\t\t\t\t\tif ( conv && s.throws ) {\n\t\t\t\t\t\tresponse = conv( response );\n\t\t\t\t\t} else {\n\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\tresponse = conv( response );\n\t\t\t\t\t\t} catch ( e ) {\n\t\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\t\tstate: \"parsererror\",\n\t\t\t\t\t\t\t\terror: conv ? e : \"No conversion from \" + prev + \" to \" + current\n\t\t\t\t\t\t\t};\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn { state: \"success\", data: response };\n}\n\njQuery.extend( {\n\n\t// Counter for holding the number of active queries\n\tactive: 0,\n\n\t// Last-Modified header cache for next request\n\tlastModified: {},\n\tetag: {},\n\n\tajaxSettings: {\n\t\turl: location.href,\n\t\ttype: \"GET\",\n\t\tisLocal: rlocalProtocol.test( location.protocol ),\n\t\tglobal: true,\n\t\tprocessData: true,\n\t\tasync: true,\n\t\tcontentType: \"application/x-www-form-urlencoded; charset=UTF-8\",\n\n\t\t/*\n\t\ttimeout: 0,\n\t\tdata: null,\n\t\tdataType: null,\n\t\tusername: null,\n\t\tpassword: null,\n\t\tcache: null,\n\t\tthrows: false,\n\t\ttraditional: false,\n\t\theaders: {},\n\t\t*/\n\n\t\taccepts: {\n\t\t\t\"*\": allTypes,\n\t\t\ttext: \"text/plain\",\n\t\t\thtml: \"text/html\",\n\t\t\txml: \"application/xml, text/xml\",\n\t\t\tjson: \"application/json, text/javascript\"\n\t\t},\n\n\t\tcontents: {\n\t\t\txml: /\\bxml\\b/,\n\t\t\thtml: /\\bhtml/,\n\t\t\tjson: /\\bjson\\b/\n\t\t},\n\n\t\tresponseFields: {\n\t\t\txml: \"responseXML\",\n\t\t\ttext: \"responseText\",\n\t\t\tjson: \"responseJSON\"\n\t\t},\n\n\t\t// Data converters\n\t\t// Keys separate source (or catchall \"*\") and destination types with a single space\n\t\tconverters: {\n\n\t\t\t// Convert anything to text\n\t\t\t\"* text\": String,\n\n\t\t\t// Text to html (true = no transformation)\n\t\t\t\"text html\": true,\n\n\t\t\t// Evaluate text as a json expression\n\t\t\t\"text json\": JSON.parse,\n\n\t\t\t// Parse text as xml\n\t\t\t\"text xml\": jQuery.parseXML\n\t\t},\n\n\t\t// For options that shouldn't be deep extended:\n\t\t// you can add your own custom options here if\n\t\t// and when you create one that shouldn't be\n\t\t// deep extended (see ajaxExtend)\n\t\tflatOptions: {\n\t\t\turl: true,\n\t\t\tcontext: true\n\t\t}\n\t},\n\n\t// Creates a full fledged settings object into target\n\t// with both ajaxSettings and settings fields.\n\t// If target is omitted, writes into ajaxSettings.\n\tajaxSetup: function( target, settings ) {\n\t\treturn settings ?\n\n\t\t\t// Building a settings object\n\t\t\tajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :\n\n\t\t\t// Extending ajaxSettings\n\t\t\tajaxExtend( jQuery.ajaxSettings, target );\n\t},\n\n\tajaxPrefilter: addToPrefiltersOrTransports( prefilters ),\n\tajaxTransport: addToPrefiltersOrTransports( transports ),\n\n\t// Main method\n\tajax: function( url, options ) {\n\n\t\t// If url is an object, simulate pre-1.5 signature\n\t\tif ( typeof url === \"object\" ) {\n\t\t\toptions = url;\n\t\t\turl = undefined;\n\t\t}\n\n\t\t// Force options to be an object\n\t\toptions = options || {};\n\n\t\tvar transport,\n\n\t\t\t// URL without anti-cache param\n\t\t\tcacheURL,\n\n\t\t\t// Response headers\n\t\t\tresponseHeadersString,\n\t\t\tresponseHeaders,\n\n\t\t\t// timeout handle\n\t\t\ttimeoutTimer,\n\n\t\t\t// Url cleanup var\n\t\t\turlAnchor,\n\n\t\t\t// Request state (becomes false upon send and true upon completion)\n\t\t\tcompleted,\n\n\t\t\t// To know if global events are to be dispatched\n\t\t\tfireGlobals,\n\n\t\t\t// Loop variable\n\t\t\ti,\n\n\t\t\t// uncached part of the url\n\t\t\tuncached,\n\n\t\t\t// Create the final options object\n\t\t\ts = jQuery.ajaxSetup( {}, options ),\n\n\t\t\t// Callbacks context\n\t\t\tcallbackContext = s.context || s,\n\n\t\t\t// Context for global events is callbackContext if it is a DOM node or jQuery collection\n\t\t\tglobalEventContext = s.context &&\n\t\t\t\t( callbackContext.nodeType || callbackContext.jquery ) ?\n\t\t\t\t\tjQuery( callbackContext ) :\n\t\t\t\t\tjQuery.event,\n\n\t\t\t// Deferreds\n\t\t\tdeferred = jQuery.Deferred(),\n\t\t\tcompleteDeferred = jQuery.Callbacks( \"once memory\" ),\n\n\t\t\t// Status-dependent callbacks\n\t\t\tstatusCode = s.statusCode || {},\n\n\t\t\t// Headers (they are sent all at once)\n\t\t\trequestHeaders = {},\n\t\t\trequestHeadersNames = {},\n\n\t\t\t// Default abort message\n\t\t\tstrAbort = \"canceled\",\n\n\t\t\t// Fake xhr\n\t\t\tjqXHR = {\n\t\t\t\treadyState: 0,\n\n\t\t\t\t// Builds headers hashtable if needed\n\t\t\t\tgetResponseHeader: function( key ) {\n\t\t\t\t\tvar match;\n\t\t\t\t\tif ( completed ) {\n\t\t\t\t\t\tif ( !responseHeaders ) {\n\t\t\t\t\t\t\tresponseHeaders = {};\n\t\t\t\t\t\t\twhile ( ( match = rheaders.exec( responseHeadersString ) ) ) {\n\t\t\t\t\t\t\t\tresponseHeaders[ match[ 1 ].toLowerCase() + \" \" ] =\n\t\t\t\t\t\t\t\t\t( responseHeaders[ match[ 1 ].toLowerCase() + \" \" ] || [] )\n\t\t\t\t\t\t\t\t\t\t.concat( match[ 2 ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t\tmatch = responseHeaders[ key.toLowerCase() + \" \" ];\n\t\t\t\t\t}\n\t\t\t\t\treturn match == null ? null : match.join( \", \" );\n\t\t\t\t},\n\n\t\t\t\t// Raw string\n\t\t\t\tgetAllResponseHeaders: function() {\n\t\t\t\t\treturn completed ? responseHeadersString : null;\n\t\t\t\t},\n\n\t\t\t\t// Caches the header\n\t\t\t\tsetRequestHeader: function( name, value ) {\n\t\t\t\t\tif ( completed == null ) {\n\t\t\t\t\t\tname = requestHeadersNames[ name.toLowerCase() ] =\n\t\t\t\t\t\t\trequestHeadersNames[ name.toLowerCase() ] || name;\n\t\t\t\t\t\trequestHeaders[ name ] = value;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Overrides response content-type header\n\t\t\t\toverrideMimeType: function( type ) {\n\t\t\t\t\tif ( completed == null ) {\n\t\t\t\t\t\ts.mimeType = type;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Status-dependent callbacks\n\t\t\t\tstatusCode: function( map ) {\n\t\t\t\t\tvar code;\n\t\t\t\t\tif ( map ) {\n\t\t\t\t\t\tif ( completed ) {\n\n\t\t\t\t\t\t\t// Execute the appropriate callbacks\n\t\t\t\t\t\t\tjqXHR.always( map[ jqXHR.status ] );\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t// Lazy-add the new callbacks in a way that preserves old ones\n\t\t\t\t\t\t\tfor ( code in map ) {\n\t\t\t\t\t\t\t\tstatusCode[ code ] = [ statusCode[ code ], map[ code ] ];\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Cancel the request\n\t\t\t\tabort: function( statusText ) {\n\t\t\t\t\tvar finalText = statusText || strAbort;\n\t\t\t\t\tif ( transport ) {\n\t\t\t\t\t\ttransport.abort( finalText );\n\t\t\t\t\t}\n\t\t\t\t\tdone( 0, finalText );\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\t\t\t};\n\n\t\t// Attach deferreds\n\t\tdeferred.promise( jqXHR );\n\n\t\t// Add protocol if not provided (prefilters might expect it)\n\t\t// Handle falsy url in the settings object (#10093: consistency with old signature)\n\t\t// We also use the url parameter if available\n\t\ts.url = ( ( url || s.url || location.href ) + \"\" )\n\t\t\t.replace( rprotocol, location.protocol + \"//\" );\n\n\t\t// Alias method option to type as per ticket #12004\n\t\ts.type = options.method || options.type || s.method || s.type;\n\n\t\t// Extract dataTypes list\n\t\ts.dataTypes = ( s.dataType || \"*\" ).toLowerCase().match( rnothtmlwhite ) || [ \"\" ];\n\n\t\t// A cross-domain request is in order when the origin doesn't match the current origin.\n\t\tif ( s.crossDomain == null ) {\n\t\t\turlAnchor = document.createElement( \"a\" );\n\n\t\t\t// Support: IE <=8 - 11, Edge 12 - 15\n\t\t\t// IE throws exception on accessing the href property if url is malformed,\n\t\t\t// e.g. http://example.com:80x/\n\t\t\ttry {\n\t\t\t\turlAnchor.href = s.url;\n\n\t\t\t\t// Support: IE <=8 - 11 only\n\t\t\t\t// Anchor's host property isn't correctly set when s.url is relative\n\t\t\t\turlAnchor.href = urlAnchor.href;\n\t\t\t\ts.crossDomain = originAnchor.protocol + \"//\" + originAnchor.host !==\n\t\t\t\t\turlAnchor.protocol + \"//\" + urlAnchor.host;\n\t\t\t} catch ( e ) {\n\n\t\t\t\t// If there is an error parsing the URL, assume it is crossDomain,\n\t\t\t\t// it can be rejected by the transport if it is invalid\n\t\t\t\ts.crossDomain = true;\n\t\t\t}\n\t\t}\n\n\t\t// Convert data if not already a string\n\t\tif ( s.data && s.processData && typeof s.data !== \"string\" ) {\n\t\t\ts.data = jQuery.param( s.data, s.traditional );\n\t\t}\n\n\t\t// Apply prefilters\n\t\tinspectPrefiltersOrTransports( prefilters, s, options, jqXHR );\n\n\t\t// If request was aborted inside a prefilter, stop there\n\t\tif ( completed ) {\n\t\t\treturn jqXHR;\n\t\t}\n\n\t\t// We can fire global events as of now if asked to\n\t\t// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)\n\t\tfireGlobals = jQuery.event && s.global;\n\n\t\t// Watch for a new set of requests\n\t\tif ( fireGlobals && jQuery.active++ === 0 ) {\n\t\t\tjQuery.event.trigger( \"ajaxStart\" );\n\t\t}\n\n\t\t// Uppercase the type\n\t\ts.type = s.type.toUpperCase();\n\n\t\t// Determine if request has content\n\t\ts.hasContent = !rnoContent.test( s.type );\n\n\t\t// Save the URL in case we're toying with the If-Modified-Since\n\t\t// and/or If-None-Match header later on\n\t\t// Remove hash to simplify url manipulation\n\t\tcacheURL = s.url.replace( rhash, \"\" );\n\n\t\t// More options handling for requests with no content\n\t\tif ( !s.hasContent ) {\n\n\t\t\t// Remember the hash so we can put it back\n\t\t\tuncached = s.url.slice( cacheURL.length );\n\n\t\t\t// If data is available and should be processed, append data to url\n\t\t\tif ( s.data && ( s.processData || typeof s.data === \"string\" ) ) {\n\t\t\t\tcacheURL += ( rquery.test( cacheURL ) ? \"&\" : \"?\" ) + s.data;\n\n\t\t\t\t// #9682: remove data so that it's not used in an eventual retry\n\t\t\t\tdelete s.data;\n\t\t\t}\n\n\t\t\t// Add or update anti-cache param if needed\n\t\t\tif ( s.cache === false ) {\n\t\t\t\tcacheURL = cacheURL.replace( rantiCache, \"$1\" );\n\t\t\t\tuncached = ( rquery.test( cacheURL ) ? \"&\" : \"?\" ) + \"_=\" + ( nonce++ ) + uncached;\n\t\t\t}\n\n\t\t\t// Put hash and anti-cache on the URL that will be requested (gh-1732)\n\t\t\ts.url = cacheURL + uncached;\n\n\t\t// Change '%20' to '+' if this is encoded form body content (gh-2658)\n\t\t} else if ( s.data && s.processData &&\n\t\t\t( s.contentType || \"\" ).indexOf( \"application/x-www-form-urlencoded\" ) === 0 ) {\n\t\t\ts.data = s.data.replace( r20, \"+\" );\n\t\t}\n\n\t\t// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.\n\t\tif ( s.ifModified ) {\n\t\t\tif ( jQuery.lastModified[ cacheURL ] ) {\n\t\t\t\tjqXHR.setRequestHeader( \"If-Modified-Since\", jQuery.lastModified[ cacheURL ] );\n\t\t\t}\n\t\t\tif ( jQuery.etag[ cacheURL ] ) {\n\t\t\t\tjqXHR.setRequestHeader( \"If-None-Match\", jQuery.etag[ cacheURL ] );\n\t\t\t}\n\t\t}\n\n\t\t// Set the correct header, if data is being sent\n\t\tif ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {\n\t\t\tjqXHR.setRequestHeader( \"Content-Type\", s.contentType );\n\t\t}\n\n\t\t// Set the Accepts header for the server, depending on the dataType\n\t\tjqXHR.setRequestHeader(\n\t\t\t\"Accept\",\n\t\t\ts.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?\n\t\t\t\ts.accepts[ s.dataTypes[ 0 ] ] +\n\t\t\t\t\t( s.dataTypes[ 0 ] !== \"*\" ? \", \" + allTypes + \"; q=0.01\" : \"\" ) :\n\t\t\t\ts.accepts[ \"*\" ]\n\t\t);\n\n\t\t// Check for headers option\n\t\tfor ( i in s.headers ) {\n\t\t\tjqXHR.setRequestHeader( i, s.headers[ i ] );\n\t\t}\n\n\t\t// Allow custom headers/mimetypes and early abort\n\t\tif ( s.beforeSend &&\n\t\t\t( s.beforeSend.call( callbackContext, jqXHR, s ) === false || completed ) ) {\n\n\t\t\t// Abort if not done already and return\n\t\t\treturn jqXHR.abort();\n\t\t}\n\n\t\t// Aborting is no longer a cancellation\n\t\tstrAbort = \"abort\";\n\n\t\t// Install callbacks on deferreds\n\t\tcompleteDeferred.add( s.complete );\n\t\tjqXHR.done( s.success );\n\t\tjqXHR.fail( s.error );\n\n\t\t// Get transport\n\t\ttransport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );\n\n\t\t// If no transport, we auto-abort\n\t\tif ( !transport ) {\n\t\t\tdone( -1, \"No Transport\" );\n\t\t} else {\n\t\t\tjqXHR.readyState = 1;\n\n\t\t\t// Send global event\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( \"ajaxSend\", [ jqXHR, s ] );\n\t\t\t}\n\n\t\t\t// If request was aborted inside ajaxSend, stop there\n\t\t\tif ( completed ) {\n\t\t\t\treturn jqXHR;\n\t\t\t}\n\n\t\t\t// Timeout\n\t\t\tif ( s.async && s.timeout > 0 ) {\n\t\t\t\ttimeoutTimer = window.setTimeout( function() {\n\t\t\t\t\tjqXHR.abort( \"timeout\" );\n\t\t\t\t}, s.timeout );\n\t\t\t}\n\n\t\t\ttry {\n\t\t\t\tcompleted = false;\n\t\t\t\ttransport.send( requestHeaders, done );\n\t\t\t} catch ( e ) {\n\n\t\t\t\t// Rethrow post-completion exceptions\n\t\t\t\tif ( completed ) {\n\t\t\t\t\tthrow e;\n\t\t\t\t}\n\n\t\t\t\t// Propagate others as results\n\t\t\t\tdone( -1, e );\n\t\t\t}\n\t\t}\n\n\t\t// Callback for when everything is done\n\t\tfunction done( status, nativeStatusText, responses, headers ) {\n\t\t\tvar isSuccess, success, error, response, modified,\n\t\t\t\tstatusText = nativeStatusText;\n\n\t\t\t// Ignore repeat invocations\n\t\t\tif ( completed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcompleted = true;\n\n\t\t\t// Clear timeout if it exists\n\t\t\tif ( timeoutTimer ) {\n\t\t\t\twindow.clearTimeout( timeoutTimer );\n\t\t\t}\n\n\t\t\t// Dereference transport for early garbage collection\n\t\t\t// (no matter how long the jqXHR object will be used)\n\t\t\ttransport = undefined;\n\n\t\t\t// Cache response headers\n\t\t\tresponseHeadersString = headers || \"\";\n\n\t\t\t// Set readyState\n\t\t\tjqXHR.readyState = status > 0 ? 4 : 0;\n\n\t\t\t// Determine if successful\n\t\t\tisSuccess = status >= 200 && status < 300 || status === 304;\n\n\t\t\t// Get response data\n\t\t\tif ( responses ) {\n\t\t\t\tresponse = ajaxHandleResponses( s, jqXHR, responses );\n\t\t\t}\n\n\t\t\t// Convert no matter what (that way responseXXX fields are always set)\n\t\t\tresponse = ajaxConvert( s, response, jqXHR, isSuccess );\n\n\t\t\t// If successful, handle type chaining\n\t\t\tif ( isSuccess ) {\n\n\t\t\t\t// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.\n\t\t\t\tif ( s.ifModified ) {\n\t\t\t\t\tmodified = jqXHR.getResponseHeader( \"Last-Modified\" );\n\t\t\t\t\tif ( modified ) {\n\t\t\t\t\t\tjQuery.lastModified[ cacheURL ] = modified;\n\t\t\t\t\t}\n\t\t\t\t\tmodified = jqXHR.getResponseHeader( \"etag\" );\n\t\t\t\t\tif ( modified ) {\n\t\t\t\t\t\tjQuery.etag[ cacheURL ] = modified;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// if no content\n\t\t\t\tif ( status === 204 || s.type === \"HEAD\" ) {\n\t\t\t\t\tstatusText = \"nocontent\";\n\n\t\t\t\t// if not modified\n\t\t\t\t} else if ( status === 304 ) {\n\t\t\t\t\tstatusText = \"notmodified\";\n\n\t\t\t\t// If we have data, let's convert it\n\t\t\t\t} else {\n\t\t\t\t\tstatusText = response.state;\n\t\t\t\t\tsuccess = response.data;\n\t\t\t\t\terror = response.error;\n\t\t\t\t\tisSuccess = !error;\n\t\t\t\t}\n\t\t\t} else {\n\n\t\t\t\t// Extract error from statusText and normalize for non-aborts\n\t\t\t\terror = statusText;\n\t\t\t\tif ( status || !statusText ) {\n\t\t\t\t\tstatusText = \"error\";\n\t\t\t\t\tif ( status < 0 ) {\n\t\t\t\t\t\tstatus = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Set data for the fake xhr object\n\t\t\tjqXHR.status = status;\n\t\t\tjqXHR.statusText = ( nativeStatusText || statusText ) + \"\";\n\n\t\t\t// Success/Error\n\t\t\tif ( isSuccess ) {\n\t\t\t\tdeferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );\n\t\t\t} else {\n\t\t\t\tdeferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );\n\t\t\t}\n\n\t\t\t// Status-dependent callbacks\n\t\t\tjqXHR.statusCode( statusCode );\n\t\t\tstatusCode = undefined;\n\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( isSuccess ? \"ajaxSuccess\" : \"ajaxError\",\n\t\t\t\t\t[ jqXHR, s, isSuccess ? success : error ] );\n\t\t\t}\n\n\t\t\t// Complete\n\t\t\tcompleteDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );\n\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( \"ajaxComplete\", [ jqXHR, s ] );\n\n\t\t\t\t// Handle the global AJAX counter\n\t\t\t\tif ( !( --jQuery.active ) ) {\n\t\t\t\t\tjQuery.event.trigger( \"ajaxStop\" );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn jqXHR;\n\t},\n\n\tgetJSON: function( url, data, callback ) {\n\t\treturn jQuery.get( url, data, callback, \"json\" );\n\t},\n\n\tgetScript: function( url, callback ) {\n\t\treturn jQuery.get( url, undefined, callback, \"script\" );\n\t}\n} );\n\njQuery.each( [ \"get\", \"post\" ], function( i, method ) {\n\tjQuery[ method ] = function( url, data, callback, type ) {\n\n\t\t// Shift arguments if data argument was omitted\n\t\tif ( isFunction( data ) ) {\n\t\t\ttype = type || callback;\n\t\t\tcallback = data;\n\t\t\tdata = undefined;\n\t\t}\n\n\t\t// The url can be an options object (which then must have .url)\n\t\treturn jQuery.ajax( jQuery.extend( {\n\t\t\turl: url,\n\t\t\ttype: method,\n\t\t\tdataType: type,\n\t\t\tdata: data,\n\t\t\tsuccess: callback\n\t\t}, jQuery.isPlainObject( url ) && url ) );\n\t};\n} );\n\n\njQuery._evalUrl = function( url, options ) {\n\treturn jQuery.ajax( {\n\t\turl: url,\n\n\t\t// Make this explicit, since user can override this through ajaxSetup (#11264)\n\t\ttype: \"GET\",\n\t\tdataType: \"script\",\n\t\tcache: true,\n\t\tasync: false,\n\t\tglobal: false,\n\n\t\t// Only evaluate the response if it is successful (gh-4126)\n\t\t// dataFilter is not invoked for failure responses, so using it instead\n\t\t// of the default converter is kludgy but it works.\n\t\tconverters: {\n\t\t\t\"text script\": function() {}\n\t\t},\n\t\tdataFilter: function( response ) {\n\t\t\tjQuery.globalEval( response, options );\n\t\t}\n\t} );\n};\n\n\njQuery.fn.extend( {\n\twrapAll: function( html ) {\n\t\tvar wrap;\n\n\t\tif ( this[ 0 ] ) {\n\t\t\tif ( isFunction( html ) ) {\n\t\t\t\thtml = html.call( this[ 0 ] );\n\t\t\t}\n\n\t\t\t// The elements to wrap the target around\n\t\t\twrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );\n\n\t\t\tif ( this[ 0 ].parentNode ) {\n\t\t\t\twrap.insertBefore( this[ 0 ] );\n\t\t\t}\n\n\t\t\twrap.map( function() {\n\t\t\t\tvar elem = this;\n\n\t\t\t\twhile ( elem.firstElementChild ) {\n\t\t\t\t\telem = elem.firstElementChild;\n\t\t\t\t}\n\n\t\t\t\treturn elem;\n\t\t\t} ).append( this );\n\t\t}\n\n\t\treturn this;\n\t},\n\n\twrapInner: function( html ) {\n\t\tif ( isFunction( html ) ) {\n\t\t\treturn this.each( function( i ) {\n\t\t\t\tjQuery( this ).wrapInner( html.call( this, i ) );\n\t\t\t} );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar self = jQuery( this ),\n\t\t\t\tcontents = self.contents();\n\n\t\t\tif ( contents.length ) {\n\t\t\t\tcontents.wrapAll( html );\n\n\t\t\t} else {\n\t\t\t\tself.append( html );\n\t\t\t}\n\t\t} );\n\t},\n\n\twrap: function( html ) {\n\t\tvar htmlIsFunction = isFunction( html );\n\n\t\treturn this.each( function( i ) {\n\t\t\tjQuery( this ).wrapAll( htmlIsFunction ? html.call( this, i ) : html );\n\t\t} );\n\t},\n\n\tunwrap: function( selector ) {\n\t\tthis.parent( selector ).not( \"body\" ).each( function() {\n\t\t\tjQuery( this ).replaceWith( this.childNodes );\n\t\t} );\n\t\treturn this;\n\t}\n} );\n\n\njQuery.expr.pseudos.hidden = function( elem ) {\n\treturn !jQuery.expr.pseudos.visible( elem );\n};\njQuery.expr.pseudos.visible = function( elem ) {\n\treturn !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );\n};\n\n\n\n\njQuery.ajaxSettings.xhr = function() {\n\ttry {\n\t\treturn new window.XMLHttpRequest();\n\t} catch ( e ) {}\n};\n\nvar xhrSuccessStatus = {\n\n\t\t// File protocol always yields status code 0, assume 200\n\t\t0: 200,\n\n\t\t// Support: IE <=9 only\n\t\t// #1450: sometimes IE returns 1223 when it should be 204\n\t\t1223: 204\n\t},\n\txhrSupported = jQuery.ajaxSettings.xhr();\n\nsupport.cors = !!xhrSupported && ( \"withCredentials\" in xhrSupported );\nsupport.ajax = xhrSupported = !!xhrSupported;\n\njQuery.ajaxTransport( function( options ) {\n\tvar callback, errorCallback;\n\n\t// Cross domain only allowed if supported through XMLHttpRequest\n\tif ( support.cors || xhrSupported && !options.crossDomain ) {\n\t\treturn {\n\t\t\tsend: function( headers, complete ) {\n\t\t\t\tvar i,\n\t\t\t\t\txhr = options.xhr();\n\n\t\t\t\txhr.open(\n\t\t\t\t\toptions.type,\n\t\t\t\t\toptions.url,\n\t\t\t\t\toptions.async,\n\t\t\t\t\toptions.username,\n\t\t\t\t\toptions.password\n\t\t\t\t);\n\n\t\t\t\t// Apply custom fields if provided\n\t\t\t\tif ( options.xhrFields ) {\n\t\t\t\t\tfor ( i in options.xhrFields ) {\n\t\t\t\t\t\txhr[ i ] = options.xhrFields[ i ];\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Override mime type if needed\n\t\t\t\tif ( options.mimeType && xhr.overrideMimeType ) {\n\t\t\t\t\txhr.overrideMimeType( options.mimeType );\n\t\t\t\t}\n\n\t\t\t\t// X-Requested-With header\n\t\t\t\t// For cross-domain requests, seeing as conditions for a preflight are\n\t\t\t\t// akin to a jigsaw puzzle, we simply never set it to be sure.\n\t\t\t\t// (it can always be set on a per-request basis or even using ajaxSetup)\n\t\t\t\t// For same-domain requests, won't change header if already provided.\n\t\t\t\tif ( !options.crossDomain && !headers[ \"X-Requested-With\" ] ) {\n\t\t\t\t\theaders[ \"X-Requested-With\" ] = \"XMLHttpRequest\";\n\t\t\t\t}\n\n\t\t\t\t// Set headers\n\t\t\t\tfor ( i in headers ) {\n\t\t\t\t\txhr.setRequestHeader( i, headers[ i ] );\n\t\t\t\t}\n\n\t\t\t\t// Callback\n\t\t\t\tcallback = function( type ) {\n\t\t\t\t\treturn function() {\n\t\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\t\tcallback = errorCallback = xhr.onload =\n\t\t\t\t\t\t\t\txhr.onerror = xhr.onabort = xhr.ontimeout =\n\t\t\t\t\t\t\t\t\txhr.onreadystatechange = null;\n\n\t\t\t\t\t\t\tif ( type === \"abort\" ) {\n\t\t\t\t\t\t\t\txhr.abort();\n\t\t\t\t\t\t\t} else if ( type === \"error\" ) {\n\n\t\t\t\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t\t\t\t// On a manual native abort, IE9 throws\n\t\t\t\t\t\t\t\t// errors on any property access that is not readyState\n\t\t\t\t\t\t\t\tif ( typeof xhr.status !== \"number\" ) {\n\t\t\t\t\t\t\t\t\tcomplete( 0, \"error\" );\n\t\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\t\tcomplete(\n\n\t\t\t\t\t\t\t\t\t\t// File: protocol always yields status 0; see #8605, #14207\n\t\t\t\t\t\t\t\t\t\txhr.status,\n\t\t\t\t\t\t\t\t\t\txhr.statusText\n\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tcomplete(\n\t\t\t\t\t\t\t\t\txhrSuccessStatus[ xhr.status ] || xhr.status,\n\t\t\t\t\t\t\t\t\txhr.statusText,\n\n\t\t\t\t\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t\t\t\t\t// IE9 has no XHR2 but throws on binary (trac-11426)\n\t\t\t\t\t\t\t\t\t// For XHR2 non-text, let the caller handle it (gh-2498)\n\t\t\t\t\t\t\t\t\t( xhr.responseType || \"text\" ) !== \"text\" ||\n\t\t\t\t\t\t\t\t\ttypeof xhr.responseText !== \"string\" ?\n\t\t\t\t\t\t\t\t\t\t{ binary: xhr.response } :\n\t\t\t\t\t\t\t\t\t\t{ text: xhr.responseText },\n\t\t\t\t\t\t\t\t\txhr.getAllResponseHeaders()\n\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t};\n\t\t\t\t};\n\n\t\t\t\t// Listen to events\n\t\t\t\txhr.onload = callback();\n\t\t\t\terrorCallback = xhr.onerror = xhr.ontimeout = callback( \"error\" );\n\n\t\t\t\t// Support: IE 9 only\n\t\t\t\t// Use onreadystatechange to replace onabort\n\t\t\t\t// to handle uncaught aborts\n\t\t\t\tif ( xhr.onabort !== undefined ) {\n\t\t\t\t\txhr.onabort = errorCallback;\n\t\t\t\t} else {\n\t\t\t\t\txhr.onreadystatechange = function() {\n\n\t\t\t\t\t\t// Check readyState before timeout as it changes\n\t\t\t\t\t\tif ( xhr.readyState === 4 ) {\n\n\t\t\t\t\t\t\t// Allow onerror to be called first,\n\t\t\t\t\t\t\t// but that will not handle a native abort\n\t\t\t\t\t\t\t// Also, save errorCallback to a variable\n\t\t\t\t\t\t\t// as xhr.onerror cannot be accessed\n\t\t\t\t\t\t\twindow.setTimeout( function() {\n\t\t\t\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\t\t\t\terrorCallback();\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t};\n\t\t\t\t}\n\n\t\t\t\t// Create the abort callback\n\t\t\t\tcallback = callback( \"abort\" );\n\n\t\t\t\ttry {\n\n\t\t\t\t\t// Do send the request (this may raise an exception)\n\t\t\t\t\txhr.send( options.hasContent && options.data || null );\n\t\t\t\t} catch ( e ) {\n\n\t\t\t\t\t// #14683: Only rethrow if this hasn't been notified as an error yet\n\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\tthrow e;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tabort: function() {\n\t\t\t\tif ( callback ) {\n\t\t\t\t\tcallback();\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n} );\n\n\n\n\n// Prevent auto-execution of scripts when no explicit dataType was provided (See gh-2432)\njQuery.ajaxPrefilter( function( s ) {\n\tif ( s.crossDomain ) {\n\t\ts.contents.script = false;\n\t}\n} );\n\n// Install script dataType\njQuery.ajaxSetup( {\n\taccepts: {\n\t\tscript: \"text/javascript, application/javascript, \" +\n\t\t\t\"application/ecmascript, application/x-ecmascript\"\n\t},\n\tcontents: {\n\t\tscript: /\\b(?:java|ecma)script\\b/\n\t},\n\tconverters: {\n\t\t\"text script\": function( text ) {\n\t\t\tjQuery.globalEval( text );\n\t\t\treturn text;\n\t\t}\n\t}\n} );\n\n// Handle cache's special case and crossDomain\njQuery.ajaxPrefilter( \"script\", function( s ) {\n\tif ( s.cache === undefined ) {\n\t\ts.cache = false;\n\t}\n\tif ( s.crossDomain ) {\n\t\ts.type = \"GET\";\n\t}\n} );\n\n// Bind script tag hack transport\njQuery.ajaxTransport( \"script\", function( s ) {\n\n\t// This transport only deals with cross domain or forced-by-attrs requests\n\tif ( s.crossDomain || s.scriptAttrs ) {\n\t\tvar script, callback;\n\t\treturn {\n\t\t\tsend: function( _, complete ) {\n\t\t\t\tscript = jQuery( \"<script>\" )\n\t\t\t\t\t.attr( s.scriptAttrs || {} )\n\t\t\t\t\t.prop( { charset: s.scriptCharset, src: s.url } )\n\t\t\t\t\t.on( \"load error\", callback = function( evt ) {\n\t\t\t\t\t\tscript.remove();\n\t\t\t\t\t\tcallback = null;\n\t\t\t\t\t\tif ( evt ) {\n\t\t\t\t\t\t\tcomplete( evt.type === \"error\" ? 404 : 200, evt.type );\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\n\t\t\t\t// Use native DOM manipulation to avoid our domManip AJAX trickery\n\t\t\t\tdocument.head.appendChild( script[ 0 ] );\n\t\t\t},\n\t\t\tabort: function() {\n\t\t\t\tif ( callback ) {\n\t\t\t\t\tcallback();\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n} );\n\n\n\n\nvar oldCallbacks = [],\n\trjsonp = /(=)\\?(?=&|$)|\\?\\?/;\n\n// Default jsonp settings\njQuery.ajaxSetup( {\n\tjsonp: \"callback\",\n\tjsonpCallback: function() {\n\t\tvar callback = oldCallbacks.pop() || ( jQuery.expando + \"_\" + ( nonce++ ) );\n\t\tthis[ callback ] = true;\n\t\treturn callback;\n\t}\n} );\n\n// Detect, normalize options and install callbacks for jsonp requests\njQuery.ajaxPrefilter( \"json jsonp\", function( s, originalSettings, jqXHR ) {\n\n\tvar callbackName, overwritten, responseContainer,\n\t\tjsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?\n\t\t\t\"url\" :\n\t\t\ttypeof s.data === \"string\" &&\n\t\t\t\t( s.contentType || \"\" )\n\t\t\t\t\t.indexOf( \"application/x-www-form-urlencoded\" ) === 0 &&\n\t\t\t\trjsonp.test( s.data ) && \"data\"\n\t\t);\n\n\t// Handle iff the expected data type is \"jsonp\" or we have a parameter to set\n\tif ( jsonProp || s.dataTypes[ 0 ] === \"jsonp\" ) {\n\n\t\t// Get callback name, remembering preexisting value associated with it\n\t\tcallbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?\n\t\t\ts.jsonpCallback() :\n\t\t\ts.jsonpCallback;\n\n\t\t// Insert callback into url or form data\n\t\tif ( jsonProp ) {\n\t\t\ts[ jsonProp ] = s[ jsonProp ].replace( rjsonp, \"$1\" + callbackName );\n\t\t} else if ( s.jsonp !== false ) {\n\t\t\ts.url += ( rquery.test( s.url ) ? \"&\" : \"?\" ) + s.jsonp + \"=\" + callbackName;\n\t\t}\n\n\t\t// Use data converter to retrieve json after script execution\n\t\ts.converters[ \"script json\" ] = function() {\n\t\t\tif ( !responseContainer ) {\n\t\t\t\tjQuery.error( callbackName + \" was not called\" );\n\t\t\t}\n\t\t\treturn responseContainer[ 0 ];\n\t\t};\n\n\t\t// Force json dataType\n\t\ts.dataTypes[ 0 ] = \"json\";\n\n\t\t// Install callback\n\t\toverwritten = window[ callbackName ];\n\t\twindow[ callbackName ] = function() {\n\t\t\tresponseContainer = arguments;\n\t\t};\n\n\t\t// Clean-up function (fires after converters)\n\t\tjqXHR.always( function() {\n\n\t\t\t// If previous value didn't exist - remove it\n\t\t\tif ( overwritten === undefined ) {\n\t\t\t\tjQuery( window ).removeProp( callbackName );\n\n\t\t\t// Otherwise restore preexisting value\n\t\t\t} else {\n\t\t\t\twindow[ callbackName ] = overwritten;\n\t\t\t}\n\n\t\t\t// Save back as free\n\t\t\tif ( s[ callbackName ] ) {\n\n\t\t\t\t// Make sure that re-using the options doesn't screw things around\n\t\t\t\ts.jsonpCallback = originalSettings.jsonpCallback;\n\n\t\t\t\t// Save the callback name for future use\n\t\t\t\toldCallbacks.push( callbackName );\n\t\t\t}\n\n\t\t\t// Call if it was a function and we have a response\n\t\t\tif ( responseContainer && isFunction( overwritten ) ) {\n\t\t\t\toverwritten( responseContainer[ 0 ] );\n\t\t\t}\n\n\t\t\tresponseContainer = overwritten = undefined;\n\t\t} );\n\n\t\t// Delegate to script\n\t\treturn \"script\";\n\t}\n} );\n\n\n\n\n// Support: Safari 8 only\n// In Safari 8 documents created via document.implementation.createHTMLDocument\n// collapse sibling forms: the second one becomes a child of the first one.\n// Because of that, this security measure has to be disabled in Safari 8.\n// https://bugs.webkit.org/show_bug.cgi?id=137337\nsupport.createHTMLDocument = ( function() {\n\tvar body = document.implementation.createHTMLDocument( \"\" ).body;\n\tbody.innerHTML = \"<form></form><form></form>\";\n\treturn body.childNodes.length === 2;\n} )();\n\n\n// Argument \"data\" should be string of html\n// context (optional): If specified, the fragment will be created in this context,\n// defaults to document\n// keepScripts (optional): If true, will include scripts passed in the html string\njQuery.parseHTML = function( data, context, keepScripts ) {\n\tif ( typeof data !== \"string\" ) {\n\t\treturn [];\n\t}\n\tif ( typeof context === \"boolean\" ) {\n\t\tkeepScripts = context;\n\t\tcontext = false;\n\t}\n\n\tvar base, parsed, scripts;\n\n\tif ( !context ) {\n\n\t\t// Stop scripts or inline event handlers from being executed immediately\n\t\t// by using document.implementation\n\t\tif ( support.createHTMLDocument ) {\n\t\t\tcontext = document.implementation.createHTMLDocument( \"\" );\n\n\t\t\t// Set the base href for the created document\n\t\t\t// so any parsed elements with URLs\n\t\t\t// are based on the document's URL (gh-2965)\n\t\t\tbase = context.createElement( \"base\" );\n\t\t\tbase.href = document.location.href;\n\t\t\tcontext.head.appendChild( base );\n\t\t} else {\n\t\t\tcontext = document;\n\t\t}\n\t}\n\n\tparsed = rsingleTag.exec( data );\n\tscripts = !keepScripts && [];\n\n\t// Single tag\n\tif ( parsed ) {\n\t\treturn [ context.createElement( parsed[ 1 ] ) ];\n\t}\n\n\tparsed = buildFragment( [ data ], context, scripts );\n\n\tif ( scripts && scripts.length ) {\n\t\tjQuery( scripts ).remove();\n\t}\n\n\treturn jQuery.merge( [], parsed.childNodes );\n};\n\n\n/**\n * Load a url into a page\n */\njQuery.fn.load = function( url, params, callback ) {\n\tvar selector, type, response,\n\t\tself = this,\n\t\toff = url.indexOf( \" \" );\n\n\tif ( off > -1 ) {\n\t\tselector = stripAndCollapse( url.slice( off ) );\n\t\turl = url.slice( 0, off );\n\t}\n\n\t// If it's a function\n\tif ( isFunction( params ) ) {\n\n\t\t// We assume that it's the callback\n\t\tcallback = params;\n\t\tparams = undefined;\n\n\t// Otherwise, build a param string\n\t} else if ( params && typeof params === \"object\" ) {\n\t\ttype = \"POST\";\n\t}\n\n\t// If we have elements to modify, make the request\n\tif ( self.length > 0 ) {\n\t\tjQuery.ajax( {\n\t\t\turl: url,\n\n\t\t\t// If \"type\" variable is undefined, then \"GET\" method will be used.\n\t\t\t// Make value of this field explicit since\n\t\t\t// user can override it through ajaxSetup method\n\t\t\ttype: type || \"GET\",\n\t\t\tdataType: \"html\",\n\t\t\tdata: params\n\t\t} ).done( function( responseText ) {\n\n\t\t\t// Save response for use in complete callback\n\t\t\tresponse = arguments;\n\n\t\t\tself.html( selector ?\n\n\t\t\t\t// If a selector was specified, locate the right elements in a dummy div\n\t\t\t\t// Exclude scripts to avoid IE 'Permission Denied' errors\n\t\t\t\tjQuery( \"<div>\" ).append( jQuery.parseHTML( responseText ) ).find( selector ) :\n\n\t\t\t\t// Otherwise use the full result\n\t\t\t\tresponseText );\n\n\t\t// If the request succeeds, this function gets \"data\", \"status\", \"jqXHR\"\n\t\t// but they are ignored because response was set above.\n\t\t// If it fails, this function gets \"jqXHR\", \"status\", \"error\"\n\t\t} ).always( callback && function( jqXHR, status ) {\n\t\t\tself.each( function() {\n\t\t\t\tcallback.apply( this, response || [ jqXHR.responseText, status, jqXHR ] );\n\t\t\t} );\n\t\t} );\n\t}\n\n\treturn this;\n};\n\n\n\n\n// Attach a bunch of functions for handling common AJAX events\njQuery.each( [\n\t\"ajaxStart\",\n\t\"ajaxStop\",\n\t\"ajaxComplete\",\n\t\"ajaxError\",\n\t\"ajaxSuccess\",\n\t\"ajaxSend\"\n], function( i, type ) {\n\tjQuery.fn[ type ] = function( fn ) {\n\t\treturn this.on( type, fn );\n\t};\n} );\n\n\n\n\njQuery.expr.pseudos.animated = function( elem ) {\n\treturn jQuery.grep( jQuery.timers, function( fn ) {\n\t\treturn elem === fn.elem;\n\t} ).length;\n};\n\n\n\n\njQuery.offset = {\n\tsetOffset: function( elem, options, i ) {\n\t\tvar curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,\n\t\t\tposition = jQuery.css( elem, \"position\" ),\n\t\t\tcurElem = jQuery( elem ),\n\t\t\tprops = {};\n\n\t\t// Set position first, in-case top/left are set even on static elem\n\t\tif ( position === \"static\" ) {\n\t\t\telem.style.position = \"relative\";\n\t\t}\n\n\t\tcurOffset = curElem.offset();\n\t\tcurCSSTop = jQuery.css( elem, \"top\" );\n\t\tcurCSSLeft = jQuery.css( elem, \"left\" );\n\t\tcalculatePosition = ( position === \"absolute\" || position === \"fixed\" ) &&\n\t\t\t( curCSSTop + curCSSLeft ).indexOf( \"auto\" ) > -1;\n\n\t\t// Need to be able to calculate position if either\n\t\t// top or left is auto and position is either absolute or fixed\n\t\tif ( calculatePosition ) {\n\t\t\tcurPosition = curElem.position();\n\t\t\tcurTop = curPosition.top;\n\t\t\tcurLeft = curPosition.left;\n\n\t\t} else {\n\t\t\tcurTop = parseFloat( curCSSTop ) || 0;\n\t\t\tcurLeft = parseFloat( curCSSLeft ) || 0;\n\t\t}\n\n\t\tif ( isFunction( options ) ) {\n\n\t\t\t// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)\n\t\t\toptions = options.call( elem, i, jQuery.extend( {}, curOffset ) );\n\t\t}\n\n\t\tif ( options.top != null ) {\n\t\t\tprops.top = ( options.top - curOffset.top ) + curTop;\n\t\t}\n\t\tif ( options.left != null ) {\n\t\t\tprops.left = ( options.left - curOffset.left ) + curLeft;\n\t\t}\n\n\t\tif ( \"using\" in options ) {\n\t\t\toptions.using.call( elem, props );\n\n\t\t} else {\n\t\t\tcurElem.css( props );\n\t\t}\n\t}\n};\n\njQuery.fn.extend( {\n\n\t// offset() relates an element's border box to the document origin\n\toffset: function( options ) {\n\n\t\t// Preserve chaining for setter\n\t\tif ( arguments.length ) {\n\t\t\treturn options === undefined ?\n\t\t\t\tthis :\n\t\t\t\tthis.each( function( i ) {\n\t\t\t\t\tjQuery.offset.setOffset( this, options, i );\n\t\t\t\t} );\n\t\t}\n\n\t\tvar rect, win,\n\t\t\telem = this[ 0 ];\n\n\t\tif ( !elem ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Return zeros for disconnected and hidden (display: none) elements (gh-2310)\n\t\t// Support: IE <=11 only\n\t\t// Running getBoundingClientRect on a\n\t\t// disconnected node in IE throws an error\n\t\tif ( !elem.getClientRects().length ) {\n\t\t\treturn { top: 0, left: 0 };\n\t\t}\n\n\t\t// Get document-relative position by adding viewport scroll to viewport-relative gBCR\n\t\trect = elem.getBoundingClientRect();\n\t\twin = elem.ownerDocument.defaultView;\n\t\treturn {\n\t\t\ttop: rect.top + win.pageYOffset,\n\t\t\tleft: rect.left + win.pageXOffset\n\t\t};\n\t},\n\n\t// position() relates an element's margin box to its offset parent's padding box\n\t// This corresponds to the behavior of CSS absolute positioning\n\tposition: function() {\n\t\tif ( !this[ 0 ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tvar offsetParent, offset, doc,\n\t\t\telem = this[ 0 ],\n\t\t\tparentOffset = { top: 0, left: 0 };\n\n\t\t// position:fixed elements are offset from the viewport, which itself always has zero offset\n\t\tif ( jQuery.css( elem, \"position\" ) === \"fixed\" ) {\n\n\t\t\t// Assume position:fixed implies availability of getBoundingClientRect\n\t\t\toffset = elem.getBoundingClientRect();\n\n\t\t} else {\n\t\t\toffset = this.offset();\n\n\t\t\t// Account for the *real* offset parent, which can be the document or its root element\n\t\t\t// when a statically positioned element is identified\n\t\t\tdoc = elem.ownerDocument;\n\t\t\toffsetParent = elem.offsetParent || doc.documentElement;\n\t\t\twhile ( offsetParent &&\n\t\t\t\t( offsetParent === doc.body || offsetParent === doc.documentElement ) &&\n\t\t\t\tjQuery.css( offsetParent, \"position\" ) === \"static\" ) {\n\n\t\t\t\toffsetParent = offsetParent.parentNode;\n\t\t\t}\n\t\t\tif ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {\n\n\t\t\t\t// Incorporate borders into its offset, since they are outside its content origin\n\t\t\t\tparentOffset = jQuery( offsetParent ).offset();\n\t\t\t\tparentOffset.top += jQuery.css( offsetParent, \"borderTopWidth\", true );\n\t\t\t\tparentOffset.left += jQuery.css( offsetParent, \"borderLeftWidth\", true );\n\t\t\t}\n\t\t}\n\n\t\t// Subtract parent offsets and element margins\n\t\treturn {\n\t\t\ttop: offset.top - parentOffset.top - jQuery.css( elem, \"marginTop\", true ),\n\t\t\tleft: offset.left - parentOffset.left - jQuery.css( elem, \"marginLeft\", true )\n\t\t};\n\t},\n\n\t// This method will return documentElement in the following cases:\n\t// 1) For the element inside the iframe without offsetParent, this method will return\n\t// documentElement of the parent window\n\t// 2) For the hidden or detached element\n\t// 3) For body or html element, i.e. in case of the html node - it will return itself\n\t//\n\t// but those exceptions were never presented as a real life use-cases\n\t// and might be considered as more preferable results.\n\t//\n\t// This logic, however, is not guaranteed and can change at any point in the future\n\toffsetParent: function() {\n\t\treturn this.map( function() {\n\t\t\tvar offsetParent = this.offsetParent;\n\n\t\t\twhile ( offsetParent && jQuery.css( offsetParent, \"position\" ) === \"static\" ) {\n\t\t\t\toffsetParent = offsetParent.offsetParent;\n\t\t\t}\n\n\t\t\treturn offsetParent || documentElement;\n\t\t} );\n\t}\n} );\n\n// Create scrollLeft and scrollTop methods\njQuery.each( { scrollLeft: \"pageXOffset\", scrollTop: \"pageYOffset\" }, function( method, prop ) {\n\tvar top = \"pageYOffset\" === prop;\n\n\tjQuery.fn[ method ] = function( val ) {\n\t\treturn access( this, function( elem, method, val ) {\n\n\t\t\t// Coalesce documents and windows\n\t\t\tvar win;\n\t\t\tif ( isWindow( elem ) ) {\n\t\t\t\twin = elem;\n\t\t\t} else if ( elem.nodeType === 9 ) {\n\t\t\t\twin = elem.defaultView;\n\t\t\t}\n\n\t\t\tif ( val === undefined ) {\n\t\t\t\treturn win ? win[ prop ] : elem[ method ];\n\t\t\t}\n\n\t\t\tif ( win ) {\n\t\t\t\twin.scrollTo(\n\t\t\t\t\t!top ? val : win.pageXOffset,\n\t\t\t\t\ttop ? val : win.pageYOffset\n\t\t\t\t);\n\n\t\t\t} else {\n\t\t\t\telem[ method ] = val;\n\t\t\t}\n\t\t}, method, val, arguments.length );\n\t};\n} );\n\n// Support: Safari <=7 - 9.1, Chrome <=37 - 49\n// Add the top/left cssHooks using jQuery.fn.position\n// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084\n// Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347\n// getComputedStyle returns percent when specified for top/left/bottom/right;\n// rather than make the css module depend on the offset module, just check for it here\njQuery.each( [ \"top\", \"left\" ], function( i, prop ) {\n\tjQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,\n\t\tfunction( elem, computed ) {\n\t\t\tif ( computed ) {\n\t\t\t\tcomputed = curCSS( elem, prop );\n\n\t\t\t\t// If curCSS returns percentage, fallback to offset\n\t\t\t\treturn rnumnonpx.test( computed ) ?\n\t\t\t\t\tjQuery( elem ).position()[ prop ] + \"px\" :\n\t\t\t\t\tcomputed;\n\t\t\t}\n\t\t}\n\t);\n} );\n\n\n// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods\njQuery.each( { Height: \"height\", Width: \"width\" }, function( name, type ) {\n\tjQuery.each( { padding: \"inner\" + name, content: type, \"\": \"outer\" + name },\n\t\tfunction( defaultExtra, funcName ) {\n\n\t\t// Margin is only for outerHeight, outerWidth\n\t\tjQuery.fn[ funcName ] = function( margin, value ) {\n\t\t\tvar chainable = arguments.length && ( defaultExtra || typeof margin !== \"boolean\" ),\n\t\t\t\textra = defaultExtra || ( margin === true || value === true ? \"margin\" : \"border\" );\n\n\t\t\treturn access( this, function( elem, type, value ) {\n\t\t\t\tvar doc;\n\n\t\t\t\tif ( isWindow( elem ) ) {\n\n\t\t\t\t\t// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)\n\t\t\t\t\treturn funcName.indexOf( \"outer\" ) === 0 ?\n\t\t\t\t\t\telem[ \"inner\" + name ] :\n\t\t\t\t\t\telem.document.documentElement[ \"client\" + name ];\n\t\t\t\t}\n\n\t\t\t\t// Get document width or height\n\t\t\t\tif ( elem.nodeType === 9 ) {\n\t\t\t\t\tdoc = elem.documentElement;\n\n\t\t\t\t\t// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],\n\t\t\t\t\t// whichever is greatest\n\t\t\t\t\treturn Math.max(\n\t\t\t\t\t\telem.body[ \"scroll\" + name ], doc[ \"scroll\" + name ],\n\t\t\t\t\t\telem.body[ \"offset\" + name ], doc[ \"offset\" + name ],\n\t\t\t\t\t\tdoc[ \"client\" + name ]\n\t\t\t\t\t);\n\t\t\t\t}\n\n\t\t\t\treturn value === undefined ?\n\n\t\t\t\t\t// Get width or height on the element, requesting but not forcing parseFloat\n\t\t\t\t\tjQuery.css( elem, type, extra ) :\n\n\t\t\t\t\t// Set width or height on the element\n\t\t\t\t\tjQuery.style( elem, type, value, extra );\n\t\t\t}, type, chainable ? margin : undefined, chainable );\n\t\t};\n\t} );\n} );\n\n\njQuery.each( ( \"blur focus focusin focusout resize scroll click dblclick \" +\n\t\"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave \" +\n\t\"change select submit keydown keypress keyup contextmenu\" ).split( \" \" ),\n\tfunction( i, name ) {\n\n\t// Handle event binding\n\tjQuery.fn[ name ] = function( data, fn ) {\n\t\treturn arguments.length > 0 ?\n\t\t\tthis.on( name, null, data, fn ) :\n\t\t\tthis.trigger( name );\n\t};\n} );\n\njQuery.fn.extend( {\n\thover: function( fnOver, fnOut ) {\n\t\treturn this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );\n\t}\n} );\n\n\n\n\njQuery.fn.extend( {\n\n\tbind: function( types, data, fn ) {\n\t\treturn this.on( types, null, data, fn );\n\t},\n\tunbind: function( types, fn ) {\n\t\treturn this.off( types, null, fn );\n\t},\n\n\tdelegate: function( selector, types, data, fn ) {\n\t\treturn this.on( types, selector, data, fn );\n\t},\n\tundelegate: function( selector, types, fn ) {\n\n\t\t// ( namespace ) or ( selector, types [, fn] )\n\t\treturn arguments.length === 1 ?\n\t\t\tthis.off( selector, \"**\" ) :\n\t\t\tthis.off( types, selector || \"**\", fn );\n\t}\n} );\n\n// Bind a function to a context, optionally partially applying any\n// arguments.\n// jQuery.proxy is deprecated to promote standards (specifically Function#bind)\n// However, it is not slated for removal any time soon\njQuery.proxy = function( fn, context ) {\n\tvar tmp, args, proxy;\n\n\tif ( typeof context === \"string\" ) {\n\t\ttmp = fn[ context ];\n\t\tcontext = fn;\n\t\tfn = tmp;\n\t}\n\n\t// Quick check to determine if target is callable, in the spec\n\t// this throws a TypeError, but we will just return undefined.\n\tif ( !isFunction( fn ) ) {\n\t\treturn undefined;\n\t}\n\n\t// Simulated bind\n\targs = slice.call( arguments, 2 );\n\tproxy = function() {\n\t\treturn fn.apply( context || this, args.concat( slice.call( arguments ) ) );\n\t};\n\n\t// Set the guid of unique handler to the same of original handler, so it can be removed\n\tproxy.guid = fn.guid = fn.guid || jQuery.guid++;\n\n\treturn proxy;\n};\n\njQuery.holdReady = function( hold ) {\n\tif ( hold ) {\n\t\tjQuery.readyWait++;\n\t} else {\n\t\tjQuery.ready( true );\n\t}\n};\njQuery.isArray = Array.isArray;\njQuery.parseJSON = JSON.parse;\njQuery.nodeName = nodeName;\njQuery.isFunction = isFunction;\njQuery.isWindow = isWindow;\njQuery.camelCase = camelCase;\njQuery.type = toType;\n\njQuery.now = Date.now;\n\njQuery.isNumeric = function( obj ) {\n\n\t// As of jQuery 3.0, isNumeric is limited to\n\t// strings and numbers (primitives or objects)\n\t// that can be coerced to finite numbers (gh-2662)\n\tvar type = jQuery.type( obj );\n\treturn ( type === \"number\" || type === \"string\" ) &&\n\n\t\t// parseFloat NaNs numeric-cast false positives (\"\")\n\t\t// ...but misinterprets leading-number strings, particularly hex literals (\"0x...\")\n\t\t// subtraction forces infinities to NaN\n\t\t!isNaN( obj - parseFloat( obj ) );\n};\n\n\n\n\n// Register as a named AMD module, since jQuery can be concatenated with other\n// files that may use define, but not via a proper concatenation script that\n// understands anonymous AMD modules. A named AMD is safest and most robust\n// way to register. Lowercase jquery is used because AMD module names are\n// derived from file names, and jQuery is normally delivered in a lowercase\n// file name. Do this after creating the global so that if an AMD module wants\n// to call noConflict to hide this version of jQuery, it will work.\n\n// Note that for maximum portability, libraries that are not jQuery should\n// declare themselves as anonymous modules, and avoid setting a global if an\n// AMD loader is present. jQuery is a special case. For more information, see\n// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon\n\nif ( typeof define === \"function\" && define.amd ) {\n\tdefine( \"jquery\", [], function() {\n\t\treturn jQuery;\n\t} );\n}\n\n\n\n\nvar\n\n\t// Map over jQuery in case of overwrite\n\t_jQuery = window.jQuery,\n\n\t// Map over the $ in case of overwrite\n\t_$ = window.$;\n\njQuery.noConflict = function( deep ) {\n\tif ( window.$ === jQuery ) {\n\t\twindow.$ = _$;\n\t}\n\n\tif ( deep && window.jQuery === jQuery ) {\n\t\twindow.jQuery = _jQuery;\n\t}\n\n\treturn jQuery;\n};\n\n// Expose jQuery and $ identifiers, even in AMD\n// (#7102#comment:10, https://github.com/jquery/jquery/pull/557)\n// and CommonJS for browser emulators (#13566)\nif ( !noGlobal ) {\n\twindow.jQuery = window.$ = jQuery;\n}\n\n\n\n\nreturn jQuery;\n} );\n","module.exports = function() {\n\tthrow new Error(\"define cannot be used indirect\");\n};\n","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nvar runtime = (function (exports) {\n \"use strict\";\n\n var Op = Object.prototype;\n var hasOwn = Op.hasOwnProperty;\n var undefined; // More compressible than void 0.\n var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n function wrap(innerFn, outerFn, self, tryLocsList) {\n // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n var generator = Object.create(protoGenerator.prototype);\n var context = new Context(tryLocsList || []);\n\n // The ._invoke method unifies the implementations of the .next,\n // .throw, and .return methods.\n generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n return generator;\n }\n exports.wrap = wrap;\n\n // Try/catch helper to minimize deoptimizations. Returns a completion\n // record like context.tryEntries[i].completion. This interface could\n // have been (and was previously) designed to take a closure to be\n // invoked without arguments, but in all the cases we care about we\n // already have an existing method we want to call, so there's no need\n // to create a new function object. We can even get away with assuming\n // the method takes exactly one argument, since that happens to be true\n // in every case, so we don't have to touch the arguments object. The\n // only additional allocation required is the completion record, which\n // has a stable shape and so hopefully should be cheap to allocate.\n function tryCatch(fn, obj, arg) {\n try {\n return { type: \"normal\", arg: fn.call(obj, arg) };\n } catch (err) {\n return { type: \"throw\", arg: err };\n }\n }\n\n var GenStateSuspendedStart = \"suspendedStart\";\n var GenStateSuspendedYield = \"suspendedYield\";\n var GenStateExecuting = \"executing\";\n var GenStateCompleted = \"completed\";\n\n // Returning this object from the innerFn has the same effect as\n // breaking out of the dispatch switch statement.\n var ContinueSentinel = {};\n\n // Dummy constructor functions that we use as the .constructor and\n // .constructor.prototype properties for functions that return Generator\n // objects. For full spec compliance, you may wish to configure your\n // minifier not to mangle the names of these two functions.\n function Generator() {}\n function GeneratorFunction() {}\n function GeneratorFunctionPrototype() {}\n\n // This is a polyfill for %IteratorPrototype% for environments that\n // don't natively support it.\n var IteratorPrototype = {};\n IteratorPrototype[iteratorSymbol] = function () {\n return this;\n };\n\n var getProto = Object.getPrototypeOf;\n var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n if (NativeIteratorPrototype &&\n NativeIteratorPrototype !== Op &&\n hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n // This environment has a native %IteratorPrototype%; use it instead\n // of the polyfill.\n IteratorPrototype = NativeIteratorPrototype;\n }\n\n var Gp = GeneratorFunctionPrototype.prototype =\n Generator.prototype = Object.create(IteratorPrototype);\n GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n GeneratorFunctionPrototype.constructor = GeneratorFunction;\n GeneratorFunctionPrototype[toStringTagSymbol] =\n GeneratorFunction.displayName = \"GeneratorFunction\";\n\n // Helper for defining the .next, .throw, and .return methods of the\n // Iterator interface in terms of a single ._invoke method.\n function defineIteratorMethods(prototype) {\n [\"next\", \"throw\", \"return\"].forEach(function(method) {\n prototype[method] = function(arg) {\n return this._invoke(method, arg);\n };\n });\n }\n\n exports.isGeneratorFunction = function(genFun) {\n var ctor = typeof genFun === \"function\" && genFun.constructor;\n return ctor\n ? ctor === GeneratorFunction ||\n // For the native GeneratorFunction constructor, the best we can\n // do is to check its .name property.\n (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n : false;\n };\n\n exports.mark = function(genFun) {\n if (Object.setPrototypeOf) {\n Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n } else {\n genFun.__proto__ = GeneratorFunctionPrototype;\n if (!(toStringTagSymbol in genFun)) {\n genFun[toStringTagSymbol] = \"GeneratorFunction\";\n }\n }\n genFun.prototype = Object.create(Gp);\n return genFun;\n };\n\n // Within the body of any async function, `await x` is transformed to\n // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n // meant to be awaited.\n exports.awrap = function(arg) {\n return { __await: arg };\n };\n\n function AsyncIterator(generator) {\n function invoke(method, arg, resolve, reject) {\n var record = tryCatch(generator[method], generator, arg);\n if (record.type === \"throw\") {\n reject(record.arg);\n } else {\n var result = record.arg;\n var value = result.value;\n if (value &&\n typeof value === \"object\" &&\n hasOwn.call(value, \"__await\")) {\n return Promise.resolve(value.__await).then(function(value) {\n invoke(\"next\", value, resolve, reject);\n }, function(err) {\n invoke(\"throw\", err, resolve, reject);\n });\n }\n\n return Promise.resolve(value).then(function(unwrapped) {\n // When a yielded Promise is resolved, its final value becomes\n // the .value of the Promise<{value,done}> result for the\n // current iteration.\n result.value = unwrapped;\n resolve(result);\n }, function(error) {\n // If a rejected Promise was yielded, throw the rejection back\n // into the async generator function so it can be handled there.\n return invoke(\"throw\", error, resolve, reject);\n });\n }\n }\n\n var previousPromise;\n\n function enqueue(method, arg) {\n function callInvokeWithMethodAndArg() {\n return new Promise(function(resolve, reject) {\n invoke(method, arg, resolve, reject);\n });\n }\n\n return previousPromise =\n // If enqueue has been called before, then we want to wait until\n // all previous Promises have been resolved before calling invoke,\n // so that results are always delivered in the correct order. If\n // enqueue has not been called before, then it is important to\n // call invoke immediately, without waiting on a callback to fire,\n // so that the async generator function has the opportunity to do\n // any necessary setup in a predictable way. This predictability\n // is why the Promise constructor synchronously invokes its\n // executor callback, and why async functions synchronously\n // execute code before the first await. Since we implement simple\n // async functions in terms of async generators, it is especially\n // important to get this right, even though it requires care.\n previousPromise ? previousPromise.then(\n callInvokeWithMethodAndArg,\n // Avoid propagating failures to Promises returned by later\n // invocations of the iterator.\n callInvokeWithMethodAndArg\n ) : callInvokeWithMethodAndArg();\n }\n\n // Define the unified helper method that is used to implement .next,\n // .throw, and .return (see defineIteratorMethods).\n this._invoke = enqueue;\n }\n\n defineIteratorMethods(AsyncIterator.prototype);\n AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n return this;\n };\n exports.AsyncIterator = AsyncIterator;\n\n // Note that simple async functions are implemented on top of\n // AsyncIterator objects; they just return a Promise for the value of\n // the final result produced by the iterator.\n exports.async = function(innerFn, outerFn, self, tryLocsList) {\n var iter = new AsyncIterator(\n wrap(innerFn, outerFn, self, tryLocsList)\n );\n\n return exports.isGeneratorFunction(outerFn)\n ? iter // If outerFn is a generator, return the full iterator.\n : iter.next().then(function(result) {\n return result.done ? result.value : iter.next();\n });\n };\n\n function makeInvokeMethod(innerFn, self, context) {\n var state = GenStateSuspendedStart;\n\n return function invoke(method, arg) {\n if (state === GenStateExecuting) {\n throw new Error(\"Generator is already running\");\n }\n\n if (state === GenStateCompleted) {\n if (method === \"throw\") {\n throw arg;\n }\n\n // Be forgiving, per 25.3.3.3.3 of the spec:\n // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n return doneResult();\n }\n\n context.method = method;\n context.arg = arg;\n\n while (true) {\n var delegate = context.delegate;\n if (delegate) {\n var delegateResult = maybeInvokeDelegate(delegate, context);\n if (delegateResult) {\n if (delegateResult === ContinueSentinel) continue;\n return delegateResult;\n }\n }\n\n if (context.method === \"next\") {\n // Setting context._sent for legacy support of Babel's\n // function.sent implementation.\n context.sent = context._sent = context.arg;\n\n } else if (context.method === \"throw\") {\n if (state === GenStateSuspendedStart) {\n state = GenStateCompleted;\n throw context.arg;\n }\n\n context.dispatchException(context.arg);\n\n } else if (context.method === \"return\") {\n context.abrupt(\"return\", context.arg);\n }\n\n state = GenStateExecuting;\n\n var record = tryCatch(innerFn, self, context);\n if (record.type === \"normal\") {\n // If an exception is thrown from innerFn, we leave state ===\n // GenStateExecuting and loop back for another invocation.\n state = context.done\n ? GenStateCompleted\n : GenStateSuspendedYield;\n\n if (record.arg === ContinueSentinel) {\n continue;\n }\n\n return {\n value: record.arg,\n done: context.done\n };\n\n } else if (record.type === \"throw\") {\n state = GenStateCompleted;\n // Dispatch the exception by looping back around to the\n // context.dispatchException(context.arg) call above.\n context.method = \"throw\";\n context.arg = record.arg;\n }\n }\n };\n }\n\n // Call delegate.iterator[context.method](context.arg) and handle the\n // result, either by returning a { value, done } result from the\n // delegate iterator, or by modifying context.method and context.arg,\n // setting context.delegate to null, and returning the ContinueSentinel.\n function maybeInvokeDelegate(delegate, context) {\n var method = delegate.iterator[context.method];\n if (method === undefined) {\n // A .throw or .return when the delegate iterator has no .throw\n // method always terminates the yield* loop.\n context.delegate = null;\n\n if (context.method === \"throw\") {\n // Note: [\"return\"] must be used for ES3 parsing compatibility.\n if (delegate.iterator[\"return\"]) {\n // If the delegate iterator has a return method, give it a\n // chance to clean up.\n context.method = \"return\";\n context.arg = undefined;\n maybeInvokeDelegate(delegate, context);\n\n if (context.method === \"throw\") {\n // If maybeInvokeDelegate(context) changed context.method from\n // \"return\" to \"throw\", let that override the TypeError below.\n return ContinueSentinel;\n }\n }\n\n context.method = \"throw\";\n context.arg = new TypeError(\n \"The iterator does not provide a 'throw' method\");\n }\n\n return ContinueSentinel;\n }\n\n var record = tryCatch(method, delegate.iterator, context.arg);\n\n if (record.type === \"throw\") {\n context.method = \"throw\";\n context.arg = record.arg;\n context.delegate = null;\n return ContinueSentinel;\n }\n\n var info = record.arg;\n\n if (! info) {\n context.method = \"throw\";\n context.arg = new TypeError(\"iterator result is not an object\");\n context.delegate = null;\n return ContinueSentinel;\n }\n\n if (info.done) {\n // Assign the result of the finished delegate to the temporary\n // variable specified by delegate.resultName (see delegateYield).\n context[delegate.resultName] = info.value;\n\n // Resume execution at the desired location (see delegateYield).\n context.next = delegate.nextLoc;\n\n // If context.method was \"throw\" but the delegate handled the\n // exception, let the outer generator proceed normally. If\n // context.method was \"next\", forget context.arg since it has been\n // \"consumed\" by the delegate iterator. If context.method was\n // \"return\", allow the original .return call to continue in the\n // outer generator.\n if (context.method !== \"return\") {\n context.method = \"next\";\n context.arg = undefined;\n }\n\n } else {\n // Re-yield the result returned by the delegate method.\n return info;\n }\n\n // The delegate iterator is finished, so forget it and continue with\n // the outer generator.\n context.delegate = null;\n return ContinueSentinel;\n }\n\n // Define Generator.prototype.{next,throw,return} in terms of the\n // unified ._invoke helper method.\n defineIteratorMethods(Gp);\n\n Gp[toStringTagSymbol] = \"Generator\";\n\n // A Generator should always return itself as the iterator object when the\n // @@iterator function is called on it. Some browsers' implementations of the\n // iterator prototype chain incorrectly implement this, causing the Generator\n // object to not be returned from this call. This ensures that doesn't happen.\n // See https://github.com/facebook/regenerator/issues/274 for more details.\n Gp[iteratorSymbol] = function() {\n return this;\n };\n\n Gp.toString = function() {\n return \"[object Generator]\";\n };\n\n function pushTryEntry(locs) {\n var entry = { tryLoc: locs[0] };\n\n if (1 in locs) {\n entry.catchLoc = locs[1];\n }\n\n if (2 in locs) {\n entry.finallyLoc = locs[2];\n entry.afterLoc = locs[3];\n }\n\n this.tryEntries.push(entry);\n }\n\n function resetTryEntry(entry) {\n var record = entry.completion || {};\n record.type = \"normal\";\n delete record.arg;\n entry.completion = record;\n }\n\n function Context(tryLocsList) {\n // The root entry object (effectively a try statement without a catch\n // or a finally block) gives us a place to store values thrown from\n // locations where there is no enclosing try statement.\n this.tryEntries = [{ tryLoc: \"root\" }];\n tryLocsList.forEach(pushTryEntry, this);\n this.reset(true);\n }\n\n exports.keys = function(object) {\n var keys = [];\n for (var key in object) {\n keys.push(key);\n }\n keys.reverse();\n\n // Rather than returning an object with a next method, we keep\n // things simple and return the next function itself.\n return function next() {\n while (keys.length) {\n var key = keys.pop();\n if (key in object) {\n next.value = key;\n next.done = false;\n return next;\n }\n }\n\n // To avoid creating an additional object, we just hang the .value\n // and .done properties off the next function object itself. This\n // also ensures that the minifier will not anonymize the function.\n next.done = true;\n return next;\n };\n };\n\n function values(iterable) {\n if (iterable) {\n var iteratorMethod = iterable[iteratorSymbol];\n if (iteratorMethod) {\n return iteratorMethod.call(iterable);\n }\n\n if (typeof iterable.next === \"function\") {\n return iterable;\n }\n\n if (!isNaN(iterable.length)) {\n var i = -1, next = function next() {\n while (++i < iterable.length) {\n if (hasOwn.call(iterable, i)) {\n next.value = iterable[i];\n next.done = false;\n return next;\n }\n }\n\n next.value = undefined;\n next.done = true;\n\n return next;\n };\n\n return next.next = next;\n }\n }\n\n // Return an iterator with no values.\n return { next: doneResult };\n }\n exports.values = values;\n\n function doneResult() {\n return { value: undefined, done: true };\n }\n\n Context.prototype = {\n constructor: Context,\n\n reset: function(skipTempReset) {\n this.prev = 0;\n this.next = 0;\n // Resetting context._sent for legacy support of Babel's\n // function.sent implementation.\n this.sent = this._sent = undefined;\n this.done = false;\n this.delegate = null;\n\n this.method = \"next\";\n this.arg = undefined;\n\n this.tryEntries.forEach(resetTryEntry);\n\n if (!skipTempReset) {\n for (var name in this) {\n // Not sure about the optimal order of these conditions:\n if (name.charAt(0) === \"t\" &&\n hasOwn.call(this, name) &&\n !isNaN(+name.slice(1))) {\n this[name] = undefined;\n }\n }\n }\n },\n\n stop: function() {\n this.done = true;\n\n var rootEntry = this.tryEntries[0];\n var rootRecord = rootEntry.completion;\n if (rootRecord.type === \"throw\") {\n throw rootRecord.arg;\n }\n\n return this.rval;\n },\n\n dispatchException: function(exception) {\n if (this.done) {\n throw exception;\n }\n\n var context = this;\n function handle(loc, caught) {\n record.type = \"throw\";\n record.arg = exception;\n context.next = loc;\n\n if (caught) {\n // If the dispatched exception was caught by a catch block,\n // then let that catch block handle the exception normally.\n context.method = \"next\";\n context.arg = undefined;\n }\n\n return !! caught;\n }\n\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n var record = entry.completion;\n\n if (entry.tryLoc === \"root\") {\n // Exception thrown outside of any try block that could handle\n // it, so set the completion value of the entire function to\n // throw the exception.\n return handle(\"end\");\n }\n\n if (entry.tryLoc <= this.prev) {\n var hasCatch = hasOwn.call(entry, \"catchLoc\");\n var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n if (hasCatch && hasFinally) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n } else if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else if (hasCatch) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n }\n\n } else if (hasFinally) {\n if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else {\n throw new Error(\"try statement without catch or finally\");\n }\n }\n }\n },\n\n abrupt: function(type, arg) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.tryLoc <= this.prev &&\n hasOwn.call(entry, \"finallyLoc\") &&\n this.prev < entry.finallyLoc) {\n var finallyEntry = entry;\n break;\n }\n }\n\n if (finallyEntry &&\n (type === \"break\" ||\n type === \"continue\") &&\n finallyEntry.tryLoc <= arg &&\n arg <= finallyEntry.finallyLoc) {\n // Ignore the finally entry if control is not jumping to a\n // location outside the try/catch block.\n finallyEntry = null;\n }\n\n var record = finallyEntry ? 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' +\n 'Read more at http://fb.me/use-check-prop-types'\n );\n err.name = 'Invariant Violation';\n throw err;\n };\n shim.isRequired = shim;\n function getShim() {\n return shim;\n };\n // Important!\n // Keep this list in sync with production version in `./factoryWithTypeCheckers.js`.\n var ReactPropTypes = {\n array: shim,\n bool: shim,\n func: shim,\n number: shim,\n object: shim,\n string: shim,\n symbol: shim,\n\n any: shim,\n arrayOf: getShim,\n element: shim,\n elementType: shim,\n instanceOf: getShim,\n node: shim,\n objectOf: getShim,\n oneOf: getShim,\n oneOfType: getShim,\n shape: getShim,\n exact: getShim,\n\n checkPropTypes: emptyFunctionWithReset,\n resetWarningCache: emptyFunction\n };\n\n ReactPropTypes.PropTypes = ReactPropTypes;\n\n return ReactPropTypes;\n};\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use 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source tree.\n */\n\n'use strict';Object.defineProperty(exports,\"__esModule\",{value:!0});\nvar b=\"function\"===typeof Symbol&&Symbol.for,c=b?Symbol.for(\"react.element\"):60103,d=b?Symbol.for(\"react.portal\"):60106,e=b?Symbol.for(\"react.fragment\"):60107,f=b?Symbol.for(\"react.strict_mode\"):60108,g=b?Symbol.for(\"react.profiler\"):60114,h=b?Symbol.for(\"react.provider\"):60109,k=b?Symbol.for(\"react.context\"):60110,l=b?Symbol.for(\"react.async_mode\"):60111,m=b?Symbol.for(\"react.concurrent_mode\"):60111,n=b?Symbol.for(\"react.forward_ref\"):60112,p=b?Symbol.for(\"react.suspense\"):60113,q=b?Symbol.for(\"react.suspense_list\"):\n60120,r=b?Symbol.for(\"react.memo\"):60115,t=b?Symbol.for(\"react.lazy\"):60116,v=b?Symbol.for(\"react.fundamental\"):60117,w=b?Symbol.for(\"react.responder\"):60118,x=b?Symbol.for(\"react.scope\"):60119;function y(a){if(\"object\"===typeof a&&null!==a){var u=a.$$typeof;switch(u){case c:switch(a=a.type,a){case l:case m:case e:case g:case f:case p:return 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strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react.production.min.js');\n} else {\n module.exports = require('./cjs/react.development.js');\n}\n","export default function _extends() {\n _extends = Object.assign || function (target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i];\n\n for (var key in source) {\n if (Object.prototype.hasOwnProperty.call(source, key)) {\n target[key] = source[key];\n }\n }\n }\n\n return target;\n };\n\n return _extends.apply(this, arguments);\n}","import _extends from '@babel/runtime/helpers/esm/extends';\nimport resolvePathname from 'resolve-pathname';\nimport valueEqual from 'value-equal';\nimport warning from 'tiny-warning';\nimport invariant from 'tiny-invariant';\n\nfunction addLeadingSlash(path) {\n return path.charAt(0) === '/' ? path : '/' + path;\n}\nfunction stripLeadingSlash(path) {\n return path.charAt(0) === '/' ? path.substr(1) : path;\n}\nfunction hasBasename(path, prefix) {\n return path.toLowerCase().indexOf(prefix.toLowerCase()) === 0 && '/?#'.indexOf(path.charAt(prefix.length)) !== -1;\n}\nfunction stripBasename(path, prefix) {\n return hasBasename(path, prefix) ? path.substr(prefix.length) : path;\n}\nfunction stripTrailingSlash(path) {\n return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;\n}\nfunction parsePath(path) {\n var pathname = path || '/';\n var search = '';\n var hash = '';\n var hashIndex = pathname.indexOf('#');\n\n if (hashIndex !== -1) {\n hash = pathname.substr(hashIndex);\n pathname = pathname.substr(0, hashIndex);\n }\n\n var searchIndex = pathname.indexOf('?');\n\n if (searchIndex !== -1) {\n search = pathname.substr(searchIndex);\n pathname = pathname.substr(0, searchIndex);\n }\n\n return {\n pathname: pathname,\n search: search === '?' ? '' : search,\n hash: hash === '#' ? '' : hash\n };\n}\nfunction createPath(location) {\n var pathname = location.pathname,\n search = location.search,\n hash = location.hash;\n var path = pathname || '/';\n if (search && search !== '?') path += search.charAt(0) === '?' ? search : \"?\" + search;\n if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : \"#\" + hash;\n return path;\n}\n\nfunction createLocation(path, state, key, currentLocation) {\n var location;\n\n if (typeof path === 'string') {\n // Two-arg form: push(path, state)\n location = parsePath(path);\n location.state = state;\n } else {\n // One-arg form: push(location)\n location = _extends({}, path);\n if (location.pathname === undefined) location.pathname = '';\n\n if (location.search) {\n if (location.search.charAt(0) !== '?') location.search = '?' + location.search;\n } else {\n location.search = '';\n }\n\n if (location.hash) {\n if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;\n } else {\n location.hash = '';\n }\n\n if (state !== undefined && location.state === undefined) location.state = state;\n }\n\n try {\n location.pathname = decodeURI(location.pathname);\n } catch (e) {\n if (e instanceof URIError) {\n throw new URIError('Pathname \"' + location.pathname + '\" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');\n } else {\n throw e;\n }\n }\n\n if (key) location.key = key;\n\n if (currentLocation) {\n // Resolve incomplete/relative pathname relative to current location.\n if (!location.pathname) {\n location.pathname = currentLocation.pathname;\n } else if (location.pathname.charAt(0) !== '/') {\n location.pathname = resolvePathname(location.pathname, currentLocation.pathname);\n }\n } else {\n // When there is no prior location and pathname is empty, set it to /\n if (!location.pathname) {\n location.pathname = '/';\n }\n }\n\n return location;\n}\nfunction locationsAreEqual(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);\n}\n\nfunction createTransitionManager() {\n var prompt = null;\n\n function setPrompt(nextPrompt) {\n process.env.NODE_ENV !== \"production\" ? warning(prompt == null, 'A history supports only one prompt at a time') : void 0;\n prompt = nextPrompt;\n return function () {\n if (prompt === nextPrompt) prompt = null;\n };\n }\n\n function confirmTransitionTo(location, action, getUserConfirmation, callback) {\n // TODO: If another transition starts while we're still confirming\n // the previous one, we may end up in a weird state. Figure out the\n // best way to handle this.\n if (prompt != null) {\n var result = typeof prompt === 'function' ? prompt(location, action) : prompt;\n\n if (typeof result === 'string') {\n if (typeof getUserConfirmation === 'function') {\n getUserConfirmation(result, callback);\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'A history needs a getUserConfirmation function in order to use a prompt message') : void 0;\n callback(true);\n }\n } else {\n // Return false from a transition hook to cancel the transition.\n callback(result !== false);\n }\n } else {\n callback(true);\n }\n }\n\n var listeners = [];\n\n function appendListener(fn) {\n var isActive = true;\n\n function listener() {\n if (isActive) fn.apply(void 0, arguments);\n }\n\n listeners.push(listener);\n return function () {\n isActive = false;\n listeners = listeners.filter(function (item) {\n return item !== listener;\n });\n };\n }\n\n function notifyListeners() {\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n listeners.forEach(function (listener) {\n return listener.apply(void 0, args);\n });\n }\n\n return {\n setPrompt: setPrompt,\n confirmTransitionTo: confirmTransitionTo,\n appendListener: appendListener,\n notifyListeners: notifyListeners\n };\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);\nfunction getConfirmation(message, callback) {\n callback(window.confirm(message)); // eslint-disable-line no-alert\n}\n/**\n * Returns true if the HTML5 history API is supported. Taken from Modernizr.\n *\n * https://github.com/Modernizr/Modernizr/blob/master/LICENSE\n * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js\n * changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586\n */\n\nfunction supportsHistory() {\n var ua = window.navigator.userAgent;\n if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;\n return window.history && 'pushState' in window.history;\n}\n/**\n * Returns true if browser fires popstate on hash change.\n * IE10 and IE11 do not.\n */\n\nfunction supportsPopStateOnHashChange() {\n return window.navigator.userAgent.indexOf('Trident') === -1;\n}\n/**\n * Returns false if using go(n) with hash history causes a full page reload.\n */\n\nfunction supportsGoWithoutReloadUsingHash() {\n return window.navigator.userAgent.indexOf('Firefox') === -1;\n}\n/**\n * Returns true if a given popstate event is an extraneous WebKit event.\n * Accounts for the fact that Chrome on iOS fires real popstate events\n * containing undefined state when pressing the back button.\n */\n\nfunction isExtraneousPopstateEvent(event) {\n return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;\n}\n\nvar PopStateEvent = 'popstate';\nvar HashChangeEvent = 'hashchange';\n\nfunction getHistoryState() {\n try {\n return window.history.state || {};\n } catch (e) {\n // IE 11 sometimes throws when accessing window.history.state\n // See https://github.com/ReactTraining/history/pull/289\n return {};\n }\n}\n/**\n * Creates a history object that uses the HTML5 history API including\n * pushState, replaceState, and the popstate event.\n */\n\n\nfunction createBrowserHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Browser history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canUseHistory = supportsHistory();\n var needsHashChangeListener = !supportsPopStateOnHashChange();\n var _props = props,\n _props$forceRefresh = _props.forceRefresh,\n forceRefresh = _props$forceRefresh === void 0 ? false : _props$forceRefresh,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n\n function getDOMLocation(historyState) {\n var _ref = historyState || {},\n key = _ref.key,\n state = _ref.state;\n\n var _window$location = window.location,\n pathname = _window$location.pathname,\n search = _window$location.search,\n hash = _window$location.hash;\n var path = pathname + search + hash;\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path, state, key);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function handlePopState(event) {\n // Ignore extraneous popstate events in WebKit.\n if (isExtraneousPopstateEvent(event)) return;\n handlePop(getDOMLocation(event.state));\n }\n\n function handleHashChange() {\n handlePop(getDOMLocation(getHistoryState()));\n }\n\n var forceNextPop = false;\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of keys we've seen in sessionStorage.\n // Instead, we just default to 0 for keys we don't know.\n\n var toIndex = allKeys.indexOf(toLocation.key);\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allKeys.indexOf(fromLocation.key);\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n }\n\n var initialLocation = getDOMLocation(getHistoryState());\n var allKeys = [initialLocation.key]; // Public interface\n\n function createHref(location) {\n return basename + createPath(location);\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.pushState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.href = href;\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n var nextKeys = allKeys.slice(0, prevIndex + 1);\n nextKeys.push(location.key);\n allKeys = nextKeys;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history') : void 0;\n window.location.href = href;\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.replaceState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.replace(href);\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n if (prevIndex !== -1) allKeys[prevIndex] = location.key;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history') : void 0;\n window.location.replace(href);\n }\n });\n }\n\n function go(n) {\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.addEventListener(HashChangeEvent, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.removeEventListener(HashChangeEvent, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nvar HashChangeEvent$1 = 'hashchange';\nvar HashPathCoders = {\n hashbang: {\n encodePath: function encodePath(path) {\n return path.charAt(0) === '!' ? path : '!/' + stripLeadingSlash(path);\n },\n decodePath: function decodePath(path) {\n return path.charAt(0) === '!' ? path.substr(1) : path;\n }\n },\n noslash: {\n encodePath: stripLeadingSlash,\n decodePath: addLeadingSlash\n },\n slash: {\n encodePath: addLeadingSlash,\n decodePath: addLeadingSlash\n }\n};\n\nfunction stripHash(url) {\n var hashIndex = url.indexOf('#');\n return hashIndex === -1 ? url : url.slice(0, hashIndex);\n}\n\nfunction getHashPath() {\n // We can't use window.location.hash here because it's not\n // consistent across browsers - Firefox will pre-decode it!\n var href = window.location.href;\n var hashIndex = href.indexOf('#');\n return hashIndex === -1 ? '' : href.substring(hashIndex + 1);\n}\n\nfunction pushHashPath(path) {\n window.location.hash = path;\n}\n\nfunction replaceHashPath(path) {\n window.location.replace(stripHash(window.location.href) + '#' + path);\n}\n\nfunction createHashHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Hash history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canGoWithoutReload = supportsGoWithoutReloadUsingHash();\n var _props = props,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$hashType = _props.hashType,\n hashType = _props$hashType === void 0 ? 'slash' : _props$hashType;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n var _HashPathCoders$hashT = HashPathCoders[hashType],\n encodePath = _HashPathCoders$hashT.encodePath,\n decodePath = _HashPathCoders$hashT.decodePath;\n\n function getDOMLocation() {\n var path = decodePath(getHashPath());\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n var forceNextPop = false;\n var ignorePath = null;\n\n function locationsAreEqual$$1(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash;\n }\n\n function handleHashChange() {\n var path = getHashPath();\n var encodedPath = encodePath(path);\n\n if (path !== encodedPath) {\n // Ensure we always have a properly-encoded hash.\n replaceHashPath(encodedPath);\n } else {\n var location = getDOMLocation();\n var prevLocation = history.location;\n if (!forceNextPop && locationsAreEqual$$1(prevLocation, location)) return; // A hashchange doesn't always == location change.\n\n if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.\n\n ignorePath = null;\n handlePop(location);\n }\n }\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of paths we've seen in sessionStorage.\n // Instead, we just default to 0 for paths we don't know.\n\n var toIndex = allPaths.lastIndexOf(createPath(toLocation));\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n } // Ensure the hash is encoded properly before doing anything else.\n\n\n var path = getHashPath();\n var encodedPath = encodePath(path);\n if (path !== encodedPath) replaceHashPath(encodedPath);\n var initialLocation = getDOMLocation();\n var allPaths = [createPath(initialLocation)]; // Public interface\n\n function createHref(location) {\n var baseTag = document.querySelector('base');\n var href = '';\n\n if (baseTag && baseTag.getAttribute('href')) {\n href = stripHash(window.location.href);\n }\n\n return href + '#' + encodePath(basename + createPath(location));\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot push state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a PUSH, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n pushHashPath(encodedPath);\n var prevIndex = allPaths.lastIndexOf(createPath(history.location));\n var nextPaths = allPaths.slice(0, prevIndex + 1);\n nextPaths.push(path);\n allPaths = nextPaths;\n setState({\n action: action,\n location: location\n });\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack') : void 0;\n setState();\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot replace state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a REPLACE, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n replaceHashPath(encodedPath);\n }\n\n var prevIndex = allPaths.indexOf(createPath(history.location));\n if (prevIndex !== -1) allPaths[prevIndex] = path;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n process.env.NODE_ENV !== \"production\" ? warning(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser') : void 0;\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(HashChangeEvent$1, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(HashChangeEvent$1, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nfunction clamp(n, lowerBound, upperBound) {\n return Math.min(Math.max(n, lowerBound), upperBound);\n}\n/**\n * Creates a history object that stores locations in memory.\n */\n\n\nfunction createMemoryHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n var _props = props,\n getUserConfirmation = _props.getUserConfirmation,\n _props$initialEntries = _props.initialEntries,\n initialEntries = _props$initialEntries === void 0 ? ['/'] : _props$initialEntries,\n _props$initialIndex = _props.initialIndex,\n initialIndex = _props$initialIndex === void 0 ? 0 : _props$initialIndex,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = history.entries.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var index = clamp(initialIndex, 0, initialEntries.length - 1);\n var entries = initialEntries.map(function (entry) {\n return typeof entry === 'string' ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key || createKey());\n }); // Public interface\n\n var createHref = createPath;\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var prevIndex = history.index;\n var nextIndex = prevIndex + 1;\n var nextEntries = history.entries.slice(0);\n\n if (nextEntries.length > nextIndex) {\n nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);\n } else {\n nextEntries.push(location);\n }\n\n setState({\n action: action,\n location: location,\n index: nextIndex,\n entries: nextEntries\n });\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n history.entries[history.index] = location;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);\n var action = 'POP';\n var location = history.entries[nextIndex];\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location,\n index: nextIndex\n });\n } else {\n // Mimic the behavior of DOM histories by\n // causing a render after a cancelled POP.\n setState();\n }\n });\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n function canGo(n) {\n var nextIndex = history.index + n;\n return nextIndex >= 0 && nextIndex < history.entries.length;\n }\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n return transitionManager.setPrompt(prompt);\n }\n\n function listen(listener) {\n return transitionManager.appendListener(listener);\n }\n\n var history = {\n length: entries.length,\n action: 'POP',\n location: entries[index],\n index: index,\n entries: entries,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n canGo: canGo,\n block: block,\n listen: listen\n };\n return history;\n}\n\nexport { createBrowserHistory, createHashHistory, createMemoryHistory, createLocation, locationsAreEqual, parsePath, createPath };\n","import React from \"react\";\nimport { Router } from \"react-router\";\nimport { createBrowserHistory as createHistory } from \"history\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\n/**\n * The public API for a <Router> that uses HTML5 history.\n */\nclass BrowserRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n BrowserRouter.propTypes = {\n basename: PropTypes.string,\n children: PropTypes.node,\n forceRefresh: PropTypes.bool,\n getUserConfirmation: PropTypes.func,\n keyLength: PropTypes.number\n };\n\n BrowserRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<BrowserRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { BrowserRouter as Router }`.\"\n );\n };\n}\n\nexport default BrowserRouter;\n","import React from \"react\";\nimport { Router } from \"react-router\";\nimport { createHashHistory as createHistory } from \"history\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\n/**\n * The public API for a <Router> that uses window.location.hash.\n */\nclass HashRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n HashRouter.propTypes = {\n basename: PropTypes.string,\n children: PropTypes.node,\n getUserConfirmation: PropTypes.func,\n hashType: PropTypes.oneOf([\"hashbang\", \"noslash\", \"slash\"])\n };\n\n HashRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<HashRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { HashRouter as Router }`.\"\n );\n };\n}\n\nexport default HashRouter;\n","import { createLocation } from \"history\";\n\nexport const resolveToLocation = (to, currentLocation) =>\n typeof to === \"function\" ? to(currentLocation) : to;\n\nexport const normalizeToLocation = (to, currentLocation) => {\n return typeof to === \"string\"\n ? createLocation(to, null, null, currentLocation)\n : to;\n};\n","import React from \"react\";\nimport { __RouterContext as RouterContext } from \"react-router\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport { resolveToLocation, normalizeToLocation } from \"./utils/locationUtils\";\n\n// React 15 compat\nconst forwardRefShim = C => C;\nlet { forwardRef } = React;\nif (typeof forwardRef === \"undefined\") {\n forwardRef = forwardRefShim;\n}\n\nfunction isModifiedEvent(event) {\n return !!(event.metaKey || event.altKey || event.ctrlKey || event.shiftKey);\n}\n\nconst LinkAnchor = forwardRef(\n (\n {\n innerRef, // TODO: deprecate\n navigate,\n onClick,\n ...rest\n },\n forwardedRef\n ) => {\n const { target } = rest;\n\n let props = {\n ...rest,\n onClick: event => {\n try {\n if (onClick) onClick(event);\n } catch (ex) {\n event.preventDefault();\n throw ex;\n }\n\n if (\n !event.defaultPrevented && // onClick prevented default\n event.button === 0 && // ignore everything but left clicks\n (!target || target === \"_self\") && // let browser handle \"target=_blank\" etc.\n !isModifiedEvent(event) // ignore clicks with modifier keys\n ) {\n event.preventDefault();\n navigate();\n }\n }\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.ref = innerRef;\n }\n\n return <a {...props} />;\n }\n);\n\nif (__DEV__) {\n LinkAnchor.displayName = \"LinkAnchor\";\n}\n\n/**\n * The public API for rendering a history-aware <a>.\n */\nconst Link = forwardRef(\n (\n {\n component = LinkAnchor,\n replace,\n to,\n innerRef, // TODO: deprecate\n ...rest\n },\n forwardedRef\n ) => {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Link> outside a <Router>\");\n\n const { history } = context;\n\n const location = normalizeToLocation(\n resolveToLocation(to, context.location),\n context.location\n );\n\n const href = location ? history.createHref(location) : \"\";\n const props = {\n ...rest,\n href,\n navigate() {\n const location = resolveToLocation(to, context.location);\n const method = replace ? history.replace : history.push;\n\n method(location);\n }\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.innerRef = innerRef;\n }\n\n return React.createElement(component, props);\n }}\n </RouterContext.Consumer>\n );\n }\n);\n\nif (__DEV__) {\n const toType = PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.object,\n PropTypes.func\n ]);\n const refType = PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.func,\n PropTypes.shape({ current: PropTypes.any })\n ]);\n\n Link.displayName = \"Link\";\n\n Link.propTypes = {\n innerRef: refType,\n onClick: PropTypes.func,\n replace: PropTypes.bool,\n target: PropTypes.string,\n to: toType.isRequired\n };\n}\n\nexport default Link;\n","import React from \"react\";\nimport { __RouterContext as RouterContext, matchPath } from \"react-router\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport Link from \"./Link\";\nimport { resolveToLocation, normalizeToLocation } from \"./utils/locationUtils\";\n\n// React 15 compat\nconst forwardRefShim = C => C;\nlet { forwardRef } = React;\nif (typeof forwardRef === \"undefined\") {\n forwardRef = forwardRefShim;\n}\n\nfunction joinClassnames(...classnames) {\n return classnames.filter(i => i).join(\" \");\n}\n\n/**\n * A <Link> wrapper that knows if it's \"active\" or not.\n */\nconst NavLink = forwardRef(\n (\n {\n \"aria-current\": ariaCurrent = \"page\",\n activeClassName = \"active\",\n activeStyle,\n className: classNameProp,\n exact,\n isActive: isActiveProp,\n location: locationProp,\n strict,\n style: styleProp,\n to,\n innerRef, // TODO: deprecate\n ...rest\n },\n forwardedRef\n ) => {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <NavLink> outside a <Router>\");\n\n const currentLocation = locationProp || context.location;\n const toLocation = normalizeToLocation(\n resolveToLocation(to, currentLocation),\n currentLocation\n );\n const { pathname: path } = toLocation;\n // Regex taken from: https://github.com/pillarjs/path-to-regexp/blob/master/index.js#L202\n const escapedPath =\n path && path.replace(/([.+*?=^!:${}()[\\]|/\\\\])/g, \"\\\\$1\");\n\n const match = escapedPath\n ? matchPath(currentLocation.pathname, {\n path: escapedPath,\n exact,\n strict\n })\n : null;\n const isActive = !!(isActiveProp\n ? isActiveProp(match, currentLocation)\n : match);\n\n const className = isActive\n ? joinClassnames(classNameProp, activeClassName)\n : classNameProp;\n const style = isActive ? { ...styleProp, ...activeStyle } : styleProp;\n\n const props = {\n \"aria-current\": (isActive && ariaCurrent) || null,\n className,\n style,\n to: toLocation,\n ...rest\n };\n\n // React 15 compat\n if (forwardRefShim !== forwardRef) {\n props.ref = forwardedRef || innerRef;\n } else {\n props.innerRef = innerRef;\n }\n\n return <Link {...props} />;\n }}\n </RouterContext.Consumer>\n );\n }\n);\n\nif (__DEV__) {\n NavLink.displayName = \"NavLink\";\n\n const ariaCurrentType = PropTypes.oneOf([\n \"page\",\n \"step\",\n \"location\",\n \"date\",\n \"time\",\n \"true\"\n ]);\n\n NavLink.propTypes = {\n ...Link.propTypes,\n \"aria-current\": ariaCurrentType,\n activeClassName: PropTypes.string,\n activeStyle: PropTypes.object,\n className: PropTypes.string,\n exact: PropTypes.bool,\n isActive: PropTypes.func,\n location: PropTypes.object,\n strict: PropTypes.bool,\n style: PropTypes.object\n };\n}\n\nexport default NavLink;\n","var isProduction = process.env.NODE_ENV === 'production';\nvar prefix = 'Invariant failed';\nfunction invariant(condition, message) {\n if (condition) {\n return;\n }\n if (isProduction) {\n throw new Error(prefix);\n }\n throw new Error(prefix + \": \" + (message || ''));\n}\n\nexport default invariant;\n","export default function _classCallCheck(instance, Constructor) {\n if (!(instance instanceof Constructor)) {\n throw new TypeError(\"Cannot call a class as a function\");\n }\n}","function _defineProperties(target, props) {\n for (var i = 0; i < props.length; i++) {\n var descriptor = props[i];\n descriptor.enumerable = descriptor.enumerable || false;\n descriptor.configurable = true;\n if (\"value\" in descriptor) descriptor.writable = true;\n Object.defineProperty(target, descriptor.key, descriptor);\n }\n}\n\nexport default function _createClass(Constructor, protoProps, staticProps) {\n if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n if (staticProps) _defineProperties(Constructor, staticProps);\n return Constructor;\n}","export default function _getPrototypeOf(o) {\n _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n return o.__proto__ || Object.getPrototypeOf(o);\n };\n return _getPrototypeOf(o);\n}","import React from 'react';\nexport var ReactReduxContext =\n/*#__PURE__*/\nReact.createContext(null);\n\nif (process.env.NODE_ENV !== 'production') {\n ReactReduxContext.displayName = 'ReactRedux';\n}\n\nexport default ReactReduxContext;","// Default to a dummy \"batch\" implementation that just runs the callback\nfunction defaultNoopBatch(callback) {\n callback();\n}\n\nvar batch = defaultNoopBatch; // Allow injecting another batching function later\n\nexport var setBatch = function setBatch(newBatch) {\n return batch = newBatch;\n}; // Supply a getter just to skip dealing with ESM bindings\n\nexport var getBatch = function getBatch() {\n return batch;\n};","import { getBatch } from './batch'; // encapsulates the subscription logic for connecting a component to the redux store, as\n// well as nesting subscriptions of descendant components, so that we can ensure the\n// ancestor components re-render before descendants\n\nvar nullListeners = {\n notify: function notify() {}\n};\n\nfunction createListenerCollection() {\n var batch = getBatch();\n var first = null;\n var last = null;\n return {\n clear: function clear() {\n first = null;\n last = null;\n },\n notify: function notify() {\n batch(function () {\n var listener = first;\n\n while (listener) {\n listener.callback();\n listener = listener.next;\n }\n });\n },\n get: function get() {\n var listeners = [];\n var listener = first;\n\n while (listener) {\n listeners.push(listener);\n listener = listener.next;\n }\n\n return listeners;\n },\n subscribe: function subscribe(callback) {\n var isSubscribed = true;\n var listener = last = {\n callback: callback,\n next: null,\n prev: last\n };\n\n if (listener.prev) {\n listener.prev.next = listener;\n } else {\n first = listener;\n }\n\n return function unsubscribe() {\n if (!isSubscribed || first === null) return;\n isSubscribed = false;\n\n if (listener.next) {\n listener.next.prev = listener.prev;\n } else {\n last = listener.prev;\n }\n\n if (listener.prev) {\n listener.prev.next = listener.next;\n } else {\n first = listener.next;\n }\n };\n }\n };\n}\n\nvar Subscription =\n/*#__PURE__*/\nfunction () {\n function Subscription(store, parentSub) {\n this.store = store;\n this.parentSub = parentSub;\n this.unsubscribe = null;\n this.listeners = nullListeners;\n this.handleChangeWrapper = this.handleChangeWrapper.bind(this);\n }\n\n var _proto = Subscription.prototype;\n\n _proto.addNestedSub = function addNestedSub(listener) {\n this.trySubscribe();\n return this.listeners.subscribe(listener);\n };\n\n _proto.notifyNestedSubs = function notifyNestedSubs() {\n this.listeners.notify();\n };\n\n _proto.handleChangeWrapper = function handleChangeWrapper() {\n if (this.onStateChange) {\n this.onStateChange();\n }\n };\n\n _proto.isSubscribed = function isSubscribed() {\n return Boolean(this.unsubscribe);\n };\n\n _proto.trySubscribe = function trySubscribe() {\n if (!this.unsubscribe) {\n this.unsubscribe = this.parentSub ? this.parentSub.addNestedSub(this.handleChangeWrapper) : this.store.subscribe(this.handleChangeWrapper);\n this.listeners = createListenerCollection();\n }\n };\n\n _proto.tryUnsubscribe = function tryUnsubscribe() {\n if (this.unsubscribe) {\n this.unsubscribe();\n this.unsubscribe = null;\n this.listeners.clear();\n this.listeners = nullListeners;\n }\n };\n\n return Subscription;\n}();\n\nexport { Subscription as default };","import React, { useMemo, useEffect } from 'react';\nimport PropTypes from 'prop-types';\nimport { ReactReduxContext } from './Context';\nimport Subscription from '../utils/Subscription';\n\nfunction Provider(_ref) {\n var store = _ref.store,\n context = _ref.context,\n children = _ref.children;\n var contextValue = useMemo(function () {\n var subscription = new Subscription(store);\n subscription.onStateChange = subscription.notifyNestedSubs;\n return {\n store: store,\n subscription: subscription\n };\n }, [store]);\n var previousState = useMemo(function () {\n return store.getState();\n }, [store]);\n useEffect(function () {\n var subscription = contextValue.subscription;\n subscription.trySubscribe();\n\n if (previousState !== store.getState()) {\n subscription.notifyNestedSubs();\n }\n\n return function () {\n subscription.tryUnsubscribe();\n subscription.onStateChange = null;\n };\n }, [contextValue, previousState]);\n var Context = context || ReactReduxContext;\n return React.createElement(Context.Provider, {\n value: contextValue\n }, children);\n}\n\nif (process.env.NODE_ENV !== 'production') {\n Provider.propTypes = {\n store: PropTypes.shape({\n subscribe: PropTypes.func.isRequired,\n dispatch: PropTypes.func.isRequired,\n getState: PropTypes.func.isRequired\n }),\n context: PropTypes.object,\n children: PropTypes.any\n };\n}\n\nexport default Provider;","import { useEffect, useLayoutEffect } from 'react'; // React currently throws a warning when using useLayoutEffect on the server.\n// To get around it, we can conditionally useEffect on the server (no-op) and\n// useLayoutEffect in the browser. We need useLayoutEffect to ensure the store\n// subscription callback always has the selector from the latest render commit\n// available, otherwise a store update may happen between render and the effect,\n// which may cause missed updates; we also must ensure the store subscription\n// is created synchronously, otherwise a store update may occur before the\n// subscription is created and an inconsistent state may be observed\n\nexport var useIsomorphicLayoutEffect = typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined' ? useLayoutEffect : useEffect;","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/esm/objectWithoutPropertiesLoose\";\nimport hoistStatics from 'hoist-non-react-statics';\nimport React, { useContext, useMemo, useRef, useReducer } from 'react';\nimport { isValidElementType, isContextConsumer } from 'react-is';\nimport Subscription from '../utils/Subscription';\nimport { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect';\nimport { ReactReduxContext } from './Context'; // Define some constant arrays just to avoid re-creating these\n\nvar EMPTY_ARRAY = [];\nvar NO_SUBSCRIPTION_ARRAY = [null, null];\n\nvar stringifyComponent = function stringifyComponent(Comp) {\n try {\n return JSON.stringify(Comp);\n } catch (err) {\n return String(Comp);\n }\n};\n\nfunction storeStateUpdatesReducer(state, action) {\n var updateCount = state[1];\n return [action.payload, updateCount + 1];\n}\n\nfunction useIsomorphicLayoutEffectWithArgs(effectFunc, effectArgs, dependencies) {\n useIsomorphicLayoutEffect(function () {\n return effectFunc.apply(void 0, effectArgs);\n }, dependencies);\n}\n\nfunction captureWrapperProps(lastWrapperProps, lastChildProps, renderIsScheduled, wrapperProps, actualChildProps, childPropsFromStoreUpdate, notifyNestedSubs) {\n // We want to capture the wrapper props and child props we used for later comparisons\n lastWrapperProps.current = wrapperProps;\n lastChildProps.current = actualChildProps;\n renderIsScheduled.current = false; // If the render was from a store update, clear out that reference and cascade the subscriber update\n\n if (childPropsFromStoreUpdate.current) {\n childPropsFromStoreUpdate.current = null;\n notifyNestedSubs();\n }\n}\n\nfunction subscribeUpdates(shouldHandleStateChanges, store, subscription, childPropsSelector, lastWrapperProps, lastChildProps, renderIsScheduled, childPropsFromStoreUpdate, notifyNestedSubs, forceComponentUpdateDispatch) {\n // If we're not subscribed to the store, nothing to do here\n if (!shouldHandleStateChanges) return; // Capture values for checking if and when this component unmounts\n\n var didUnsubscribe = false;\n var lastThrownError = null; // We'll run this callback every time a store subscription update propagates to this component\n\n var checkForUpdates = function checkForUpdates() {\n if (didUnsubscribe) {\n // Don't run stale listeners.\n // Redux doesn't guarantee unsubscriptions happen until next dispatch.\n return;\n }\n\n var latestStoreState = store.getState();\n var newChildProps, error;\n\n try {\n // Actually run the selector with the most recent store state and wrapper props\n // to determine what the child props should be\n newChildProps = childPropsSelector(latestStoreState, lastWrapperProps.current);\n } catch (e) {\n error = e;\n lastThrownError = e;\n }\n\n if (!error) {\n lastThrownError = null;\n } // If the child props haven't changed, nothing to do here - cascade the subscription update\n\n\n if (newChildProps === lastChildProps.current) {\n if (!renderIsScheduled.current) {\n notifyNestedSubs();\n }\n } else {\n // Save references to the new child props. Note that we track the \"child props from store update\"\n // as a ref instead of a useState/useReducer because we need a way to determine if that value has\n // been processed. If this went into useState/useReducer, we couldn't clear out the value without\n // forcing another re-render, which we don't want.\n lastChildProps.current = newChildProps;\n childPropsFromStoreUpdate.current = newChildProps;\n renderIsScheduled.current = true; // If the child props _did_ change (or we caught an error), this wrapper component needs to re-render\n\n forceComponentUpdateDispatch({\n type: 'STORE_UPDATED',\n payload: {\n error: error\n }\n });\n }\n }; // Actually subscribe to the nearest connected ancestor (or store)\n\n\n subscription.onStateChange = checkForUpdates;\n subscription.trySubscribe(); // Pull data from the store after first render in case the store has\n // changed since we began.\n\n checkForUpdates();\n\n var unsubscribeWrapper = function unsubscribeWrapper() {\n didUnsubscribe = true;\n subscription.tryUnsubscribe();\n subscription.onStateChange = null;\n\n if (lastThrownError) {\n // It's possible that we caught an error due to a bad mapState function, but the\n // parent re-rendered without this component and we're about to unmount.\n // This shouldn't happen as long as we do top-down subscriptions correctly, but\n // if we ever do those wrong, this throw will surface the error in our tests.\n // In that case, throw the error from here so it doesn't get lost.\n throw lastThrownError;\n }\n };\n\n return unsubscribeWrapper;\n}\n\nvar initStateUpdates = function initStateUpdates() {\n return [null, 0];\n};\n\nexport default function connectAdvanced(\n/*\r\n selectorFactory is a func that is responsible for returning the selector function used to\r\n compute new props from state, props, and dispatch. For example:\r\n export default connectAdvanced((dispatch, options) => (state, props) => ({\r\n thing: state.things[props.thingId],\r\n saveThing: fields => dispatch(actionCreators.saveThing(props.thingId, fields)),\r\n }))(YourComponent)\r\n Access to dispatch is provided to the factory so selectorFactories can bind actionCreators\r\n outside of their selector as an optimization. Options passed to connectAdvanced are passed to\r\n the selectorFactory, along with displayName and WrappedComponent, as the second argument.\r\n Note that selectorFactory is responsible for all caching/memoization of inbound and outbound\r\n props. Do not use connectAdvanced directly without memoizing results between calls to your\r\n selector, otherwise the Connect component will re-render on every state or props change.\r\n*/\nselectorFactory, // options object:\n_ref) {\n if (_ref === void 0) {\n _ref = {};\n }\n\n var _ref2 = _ref,\n _ref2$getDisplayName = _ref2.getDisplayName,\n getDisplayName = _ref2$getDisplayName === void 0 ? function (name) {\n return \"ConnectAdvanced(\" + name + \")\";\n } : _ref2$getDisplayName,\n _ref2$methodName = _ref2.methodName,\n methodName = _ref2$methodName === void 0 ? 'connectAdvanced' : _ref2$methodName,\n _ref2$renderCountProp = _ref2.renderCountProp,\n renderCountProp = _ref2$renderCountProp === void 0 ? undefined : _ref2$renderCountProp,\n _ref2$shouldHandleSta = _ref2.shouldHandleStateChanges,\n shouldHandleStateChanges = _ref2$shouldHandleSta === void 0 ? true : _ref2$shouldHandleSta,\n _ref2$storeKey = _ref2.storeKey,\n storeKey = _ref2$storeKey === void 0 ? 'store' : _ref2$storeKey,\n _ref2$withRef = _ref2.withRef,\n withRef = _ref2$withRef === void 0 ? false : _ref2$withRef,\n _ref2$forwardRef = _ref2.forwardRef,\n forwardRef = _ref2$forwardRef === void 0 ? false : _ref2$forwardRef,\n _ref2$context = _ref2.context,\n context = _ref2$context === void 0 ? ReactReduxContext : _ref2$context,\n connectOptions = _objectWithoutPropertiesLoose(_ref2, [\"getDisplayName\", \"methodName\", \"renderCountProp\", \"shouldHandleStateChanges\", \"storeKey\", \"withRef\", \"forwardRef\", \"context\"]);\n\n if (process.env.NODE_ENV !== 'production') {\n if (renderCountProp !== undefined) {\n throw new Error(\"renderCountProp is removed. render counting is built into the latest React Dev Tools profiling extension\");\n }\n\n if (withRef) {\n throw new Error('withRef is removed. To access the wrapped instance, use a ref on the connected component');\n }\n\n var customStoreWarningMessage = 'To use a custom Redux store for specific components, create a custom React context with ' + \"React.createContext(), and pass the context object to React Redux's Provider and specific components\" + ' like: <Provider context={MyContext}><ConnectedComponent context={MyContext} /></Provider>. ' + 'You may also pass a {context : MyContext} option to connect';\n\n if (storeKey !== 'store') {\n throw new Error('storeKey has been removed and does not do anything. ' + customStoreWarningMessage);\n }\n }\n\n var Context = context;\n return function wrapWithConnect(WrappedComponent) {\n if (process.env.NODE_ENV !== 'production' && !isValidElementType(WrappedComponent)) {\n throw new Error(\"You must pass a component to the function returned by \" + (methodName + \". Instead received \" + stringifyComponent(WrappedComponent)));\n }\n\n var wrappedComponentName = WrappedComponent.displayName || WrappedComponent.name || 'Component';\n var displayName = getDisplayName(wrappedComponentName);\n\n var selectorFactoryOptions = _extends({}, connectOptions, {\n getDisplayName: getDisplayName,\n methodName: methodName,\n renderCountProp: renderCountProp,\n shouldHandleStateChanges: shouldHandleStateChanges,\n storeKey: storeKey,\n displayName: displayName,\n wrappedComponentName: wrappedComponentName,\n WrappedComponent: WrappedComponent\n });\n\n var pure = connectOptions.pure;\n\n function createChildSelector(store) {\n return selectorFactory(store.dispatch, selectorFactoryOptions);\n } // If we aren't running in \"pure\" mode, we don't want to memoize values.\n // To avoid conditionally calling hooks, we fall back to a tiny wrapper\n // that just executes the given callback immediately.\n\n\n var usePureOnlyMemo = pure ? useMemo : function (callback) {\n return callback();\n };\n\n function ConnectFunction(props) {\n var _useMemo = useMemo(function () {\n // Distinguish between actual \"data\" props that were passed to the wrapper component,\n // and values needed to control behavior (forwarded refs, alternate context instances).\n // To maintain the wrapperProps object reference, memoize this destructuring.\n var forwardedRef = props.forwardedRef,\n wrapperProps = _objectWithoutPropertiesLoose(props, [\"forwardedRef\"]);\n\n return [props.context, forwardedRef, wrapperProps];\n }, [props]),\n propsContext = _useMemo[0],\n forwardedRef = _useMemo[1],\n wrapperProps = _useMemo[2];\n\n var ContextToUse = useMemo(function () {\n // Users may optionally pass in a custom context instance to use instead of our ReactReduxContext.\n // Memoize the check that determines which context instance we should use.\n return propsContext && propsContext.Consumer && isContextConsumer(React.createElement(propsContext.Consumer, null)) ? propsContext : Context;\n }, [propsContext, Context]); // Retrieve the store and ancestor subscription via context, if available\n\n var contextValue = useContext(ContextToUse); // The store _must_ exist as either a prop or in context.\n // We'll check to see if it _looks_ like a Redux store first.\n // This allows us to pass through a `store` prop that is just a plain value.\n\n var didStoreComeFromProps = Boolean(props.store) && Boolean(props.store.getState) && Boolean(props.store.dispatch);\n var didStoreComeFromContext = Boolean(contextValue) && Boolean(contextValue.store);\n\n if (process.env.NODE_ENV !== 'production' && !didStoreComeFromProps && !didStoreComeFromContext) {\n throw new Error(\"Could not find \\\"store\\\" in the context of \" + (\"\\\"\" + displayName + \"\\\". Either wrap the root component in a <Provider>, \") + \"or pass a custom React context provider to <Provider> and the corresponding \" + (\"React context consumer to \" + displayName + \" in connect options.\"));\n } // Based on the previous check, one of these must be true\n\n\n var store = didStoreComeFromProps ? props.store : contextValue.store;\n var childPropsSelector = useMemo(function () {\n // The child props selector needs the store reference as an input.\n // Re-create this selector whenever the store changes.\n return createChildSelector(store);\n }, [store]);\n\n var _useMemo2 = useMemo(function () {\n if (!shouldHandleStateChanges) return NO_SUBSCRIPTION_ARRAY; // This Subscription's source should match where store came from: props vs. context. A component\n // connected to the store via props shouldn't use subscription from context, or vice versa.\n\n var subscription = new Subscription(store, didStoreComeFromProps ? null : contextValue.subscription); // `notifyNestedSubs` is duplicated to handle the case where the component is unmounted in\n // the middle of the notification loop, where `subscription` will then be null. This can\n // probably be avoided if Subscription's listeners logic is changed to not call listeners\n // that have been unsubscribed in the middle of the notification loop.\n\n var notifyNestedSubs = subscription.notifyNestedSubs.bind(subscription);\n return [subscription, notifyNestedSubs];\n }, [store, didStoreComeFromProps, contextValue]),\n subscription = _useMemo2[0],\n notifyNestedSubs = _useMemo2[1]; // Determine what {store, subscription} value should be put into nested context, if necessary,\n // and memoize that value to avoid unnecessary context updates.\n\n\n var overriddenContextValue = useMemo(function () {\n if (didStoreComeFromProps) {\n // This component is directly subscribed to a store from props.\n // We don't want descendants reading from this store - pass down whatever\n // the existing context value is from the nearest connected ancestor.\n return contextValue;\n } // Otherwise, put this component's subscription instance into context, so that\n // connected descendants won't update until after this component is done\n\n\n return _extends({}, contextValue, {\n subscription: subscription\n });\n }, [didStoreComeFromProps, contextValue, subscription]); // We need to force this wrapper component to re-render whenever a Redux store update\n // causes a change to the calculated child component props (or we caught an error in mapState)\n\n var _useReducer = useReducer(storeStateUpdatesReducer, EMPTY_ARRAY, initStateUpdates),\n _useReducer$ = _useReducer[0],\n previousStateUpdateResult = _useReducer$[0],\n forceComponentUpdateDispatch = _useReducer[1]; // Propagate any mapState/mapDispatch errors upwards\n\n\n if (previousStateUpdateResult && previousStateUpdateResult.error) {\n throw previousStateUpdateResult.error;\n } // Set up refs to coordinate values between the subscription effect and the render logic\n\n\n var lastChildProps = useRef();\n var lastWrapperProps = useRef(wrapperProps);\n var childPropsFromStoreUpdate = useRef();\n var renderIsScheduled = useRef(false);\n var actualChildProps = usePureOnlyMemo(function () {\n // Tricky logic here:\n // - This render may have been triggered by a Redux store update that produced new child props\n // - However, we may have gotten new wrapper props after that\n // If we have new child props, and the same wrapper props, we know we should use the new child props as-is.\n // But, if we have new wrapper props, those might change the child props, so we have to recalculate things.\n // So, we'll use the child props from store update only if the wrapper props are the same as last time.\n if (childPropsFromStoreUpdate.current && wrapperProps === lastWrapperProps.current) {\n return childPropsFromStoreUpdate.current;\n } // TODO We're reading the store directly in render() here. Bad idea?\n // This will likely cause Bad Things (TM) to happen in Concurrent Mode.\n // Note that we do this because on renders _not_ caused by store updates, we need the latest store state\n // to determine what the child props should be.\n\n\n return childPropsSelector(store.getState(), wrapperProps);\n }, [store, previousStateUpdateResult, wrapperProps]); // We need this to execute synchronously every time we re-render. However, React warns\n // about useLayoutEffect in SSR, so we try to detect environment and fall back to\n // just useEffect instead to avoid the warning, since neither will run anyway.\n\n useIsomorphicLayoutEffectWithArgs(captureWrapperProps, [lastWrapperProps, lastChildProps, renderIsScheduled, wrapperProps, actualChildProps, childPropsFromStoreUpdate, notifyNestedSubs]); // Our re-subscribe logic only runs when the store/subscription setup changes\n\n useIsomorphicLayoutEffectWithArgs(subscribeUpdates, [shouldHandleStateChanges, store, subscription, childPropsSelector, lastWrapperProps, lastChildProps, renderIsScheduled, childPropsFromStoreUpdate, notifyNestedSubs, forceComponentUpdateDispatch], [store, subscription, childPropsSelector]); // Now that all that's done, we can finally try to actually render the child component.\n // We memoize the elements for the rendered child component as an optimization.\n\n var renderedWrappedComponent = useMemo(function () {\n return React.createElement(WrappedComponent, _extends({}, actualChildProps, {\n ref: forwardedRef\n }));\n }, [forwardedRef, WrappedComponent, actualChildProps]); // If React sees the exact same element reference as last time, it bails out of re-rendering\n // that child, same as if it was wrapped in React.memo() or returned false from shouldComponentUpdate.\n\n var renderedChild = useMemo(function () {\n if (shouldHandleStateChanges) {\n // If this component is subscribed to store updates, we need to pass its own\n // subscription instance down to our descendants. That means rendering the same\n // Context instance, and putting a different value into the context.\n return React.createElement(ContextToUse.Provider, {\n value: overriddenContextValue\n }, renderedWrappedComponent);\n }\n\n return renderedWrappedComponent;\n }, [ContextToUse, renderedWrappedComponent, overriddenContextValue]);\n return renderedChild;\n } // If we're in \"pure\" mode, ensure our wrapper component only re-renders when incoming props have changed.\n\n\n var Connect = pure ? React.memo(ConnectFunction) : ConnectFunction;\n Connect.WrappedComponent = WrappedComponent;\n Connect.displayName = displayName;\n\n if (forwardRef) {\n var forwarded = React.forwardRef(function forwardConnectRef(props, ref) {\n return React.createElement(Connect, _extends({}, props, {\n forwardedRef: ref\n }));\n });\n forwarded.displayName = displayName;\n forwarded.WrappedComponent = WrappedComponent;\n return hoistStatics(forwarded, WrappedComponent);\n }\n\n return hoistStatics(Connect, WrappedComponent);\n };\n}","function is(x, y) {\n if (x === y) {\n return x !== 0 || y !== 0 || 1 / x === 1 / y;\n } else {\n return x !== x && y !== y;\n }\n}\n\nexport default function shallowEqual(objA, objB) {\n if (is(objA, objB)) return true;\n\n if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {\n return false;\n }\n\n var keysA = Object.keys(objA);\n var keysB = Object.keys(objB);\n if (keysA.length !== keysB.length) return false;\n\n for (var i = 0; i < keysA.length; i++) {\n if (!Object.prototype.hasOwnProperty.call(objB, keysA[i]) || !is(objA[keysA[i]], objB[keysA[i]])) {\n return false;\n }\n }\n\n return true;\n}","import verifyPlainObject from '../utils/verifyPlainObject';\nexport function wrapMapToPropsConstant(getConstant) {\n return function initConstantSelector(dispatch, options) {\n var constant = getConstant(dispatch, options);\n\n function constantSelector() {\n return constant;\n }\n\n constantSelector.dependsOnOwnProps = false;\n return constantSelector;\n };\n} // dependsOnOwnProps is used by createMapToPropsProxy to determine whether to pass props as args\n// to the mapToProps function being wrapped. It is also used by makePurePropsSelector to determine\n// whether mapToProps needs to be invoked when props have changed.\n//\n// A length of one signals that mapToProps does not depend on props from the parent component.\n// A length of zero is assumed to mean mapToProps is getting args via arguments or ...args and\n// therefore not reporting its length accurately..\n\nexport function getDependsOnOwnProps(mapToProps) {\n return mapToProps.dependsOnOwnProps !== null && mapToProps.dependsOnOwnProps !== undefined ? Boolean(mapToProps.dependsOnOwnProps) : mapToProps.length !== 1;\n} // Used by whenMapStateToPropsIsFunction and whenMapDispatchToPropsIsFunction,\n// this function wraps mapToProps in a proxy function which does several things:\n//\n// * Detects whether the mapToProps function being called depends on props, which\n// is used by selectorFactory to decide if it should reinvoke on props changes.\n//\n// * On first call, handles mapToProps if returns another function, and treats that\n// new function as the true mapToProps for subsequent calls.\n//\n// * On first call, verifies the first result is a plain object, in order to warn\n// the developer that their mapToProps function is not returning a valid result.\n//\n\nexport function wrapMapToPropsFunc(mapToProps, methodName) {\n return function initProxySelector(dispatch, _ref) {\n var displayName = _ref.displayName;\n\n var proxy = function mapToPropsProxy(stateOrDispatch, ownProps) {\n return proxy.dependsOnOwnProps ? proxy.mapToProps(stateOrDispatch, ownProps) : proxy.mapToProps(stateOrDispatch);\n }; // allow detectFactoryAndVerify to get ownProps\n\n\n proxy.dependsOnOwnProps = true;\n\n proxy.mapToProps = function detectFactoryAndVerify(stateOrDispatch, ownProps) {\n proxy.mapToProps = mapToProps;\n proxy.dependsOnOwnProps = getDependsOnOwnProps(mapToProps);\n var props = proxy(stateOrDispatch, ownProps);\n\n if (typeof props === 'function') {\n proxy.mapToProps = props;\n proxy.dependsOnOwnProps = getDependsOnOwnProps(props);\n props = proxy(stateOrDispatch, ownProps);\n }\n\n if (process.env.NODE_ENV !== 'production') verifyPlainObject(props, displayName, methodName);\n return props;\n };\n\n return proxy;\n };\n}","import { bindActionCreators } from 'redux';\nimport { wrapMapToPropsConstant, wrapMapToPropsFunc } from './wrapMapToProps';\nexport function whenMapDispatchToPropsIsFunction(mapDispatchToProps) {\n return typeof mapDispatchToProps === 'function' ? wrapMapToPropsFunc(mapDispatchToProps, 'mapDispatchToProps') : undefined;\n}\nexport function whenMapDispatchToPropsIsMissing(mapDispatchToProps) {\n return !mapDispatchToProps ? wrapMapToPropsConstant(function (dispatch) {\n return {\n dispatch: dispatch\n };\n }) : undefined;\n}\nexport function whenMapDispatchToPropsIsObject(mapDispatchToProps) {\n return mapDispatchToProps && typeof mapDispatchToProps === 'object' ? wrapMapToPropsConstant(function (dispatch) {\n return bindActionCreators(mapDispatchToProps, dispatch);\n }) : undefined;\n}\nexport default [whenMapDispatchToPropsIsFunction, whenMapDispatchToPropsIsMissing, whenMapDispatchToPropsIsObject];","import { wrapMapToPropsConstant, wrapMapToPropsFunc } from './wrapMapToProps';\nexport function whenMapStateToPropsIsFunction(mapStateToProps) {\n return typeof mapStateToProps === 'function' ? wrapMapToPropsFunc(mapStateToProps, 'mapStateToProps') : undefined;\n}\nexport function whenMapStateToPropsIsMissing(mapStateToProps) {\n return !mapStateToProps ? wrapMapToPropsConstant(function () {\n return {};\n }) : undefined;\n}\nexport default [whenMapStateToPropsIsFunction, whenMapStateToPropsIsMissing];","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport verifyPlainObject from '../utils/verifyPlainObject';\nexport function defaultMergeProps(stateProps, dispatchProps, ownProps) {\n return _extends({}, ownProps, {}, stateProps, {}, dispatchProps);\n}\nexport function wrapMergePropsFunc(mergeProps) {\n return function initMergePropsProxy(dispatch, _ref) {\n var displayName = _ref.displayName,\n pure = _ref.pure,\n areMergedPropsEqual = _ref.areMergedPropsEqual;\n var hasRunOnce = false;\n var mergedProps;\n return function mergePropsProxy(stateProps, dispatchProps, ownProps) {\n var nextMergedProps = mergeProps(stateProps, dispatchProps, ownProps);\n\n if (hasRunOnce) {\n if (!pure || !areMergedPropsEqual(nextMergedProps, mergedProps)) mergedProps = nextMergedProps;\n } else {\n hasRunOnce = true;\n mergedProps = nextMergedProps;\n if (process.env.NODE_ENV !== 'production') verifyPlainObject(mergedProps, displayName, 'mergeProps');\n }\n\n return mergedProps;\n };\n };\n}\nexport function whenMergePropsIsFunction(mergeProps) {\n return typeof mergeProps === 'function' ? wrapMergePropsFunc(mergeProps) : undefined;\n}\nexport function whenMergePropsIsOmitted(mergeProps) {\n return !mergeProps ? function () {\n return defaultMergeProps;\n } : undefined;\n}\nexport default [whenMergePropsIsFunction, whenMergePropsIsOmitted];","import _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/esm/objectWithoutPropertiesLoose\";\nimport verifySubselectors from './verifySubselectors';\nexport function impureFinalPropsSelectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch) {\n return function impureFinalPropsSelector(state, ownProps) {\n return mergeProps(mapStateToProps(state, ownProps), mapDispatchToProps(dispatch, ownProps), ownProps);\n };\n}\nexport function pureFinalPropsSelectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch, _ref) {\n var areStatesEqual = _ref.areStatesEqual,\n areOwnPropsEqual = _ref.areOwnPropsEqual,\n areStatePropsEqual = _ref.areStatePropsEqual;\n var hasRunAtLeastOnce = false;\n var state;\n var ownProps;\n var stateProps;\n var dispatchProps;\n var mergedProps;\n\n function handleFirstCall(firstState, firstOwnProps) {\n state = firstState;\n ownProps = firstOwnProps;\n stateProps = mapStateToProps(state, ownProps);\n dispatchProps = mapDispatchToProps(dispatch, ownProps);\n mergedProps = mergeProps(stateProps, dispatchProps, ownProps);\n hasRunAtLeastOnce = true;\n return mergedProps;\n }\n\n function handleNewPropsAndNewState() {\n stateProps = mapStateToProps(state, ownProps);\n if (mapDispatchToProps.dependsOnOwnProps) dispatchProps = mapDispatchToProps(dispatch, ownProps);\n mergedProps = mergeProps(stateProps, dispatchProps, ownProps);\n return mergedProps;\n }\n\n function handleNewProps() {\n if (mapStateToProps.dependsOnOwnProps) stateProps = mapStateToProps(state, ownProps);\n if (mapDispatchToProps.dependsOnOwnProps) dispatchProps = mapDispatchToProps(dispatch, ownProps);\n mergedProps = mergeProps(stateProps, dispatchProps, ownProps);\n return mergedProps;\n }\n\n function handleNewState() {\n var nextStateProps = mapStateToProps(state, ownProps);\n var statePropsChanged = !areStatePropsEqual(nextStateProps, stateProps);\n stateProps = nextStateProps;\n if (statePropsChanged) mergedProps = mergeProps(stateProps, dispatchProps, ownProps);\n return mergedProps;\n }\n\n function handleSubsequentCalls(nextState, nextOwnProps) {\n var propsChanged = !areOwnPropsEqual(nextOwnProps, ownProps);\n var stateChanged = !areStatesEqual(nextState, state);\n state = nextState;\n ownProps = nextOwnProps;\n if (propsChanged && stateChanged) return handleNewPropsAndNewState();\n if (propsChanged) return handleNewProps();\n if (stateChanged) return handleNewState();\n return mergedProps;\n }\n\n return function pureFinalPropsSelector(nextState, nextOwnProps) {\n return hasRunAtLeastOnce ? handleSubsequentCalls(nextState, nextOwnProps) : handleFirstCall(nextState, nextOwnProps);\n };\n} // TODO: Add more comments\n// If pure is true, the selector returned by selectorFactory will memoize its results,\n// allowing connectAdvanced's shouldComponentUpdate to return false if final\n// props have not changed. If false, the selector will always return a new\n// object and shouldComponentUpdate will always return true.\n\nexport default function finalPropsSelectorFactory(dispatch, _ref2) {\n var initMapStateToProps = _ref2.initMapStateToProps,\n initMapDispatchToProps = _ref2.initMapDispatchToProps,\n initMergeProps = _ref2.initMergeProps,\n options = _objectWithoutPropertiesLoose(_ref2, [\"initMapStateToProps\", \"initMapDispatchToProps\", \"initMergeProps\"]);\n\n var mapStateToProps = initMapStateToProps(dispatch, options);\n var mapDispatchToProps = initMapDispatchToProps(dispatch, options);\n var mergeProps = initMergeProps(dispatch, options);\n\n if (process.env.NODE_ENV !== 'production') {\n verifySubselectors(mapStateToProps, mapDispatchToProps, mergeProps, options.displayName);\n }\n\n var selectorFactory = options.pure ? pureFinalPropsSelectorFactory : impureFinalPropsSelectorFactory;\n return selectorFactory(mapStateToProps, mapDispatchToProps, mergeProps, dispatch, options);\n}","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/esm/objectWithoutPropertiesLoose\";\nimport connectAdvanced from '../components/connectAdvanced';\nimport shallowEqual from '../utils/shallowEqual';\nimport defaultMapDispatchToPropsFactories from './mapDispatchToProps';\nimport defaultMapStateToPropsFactories from './mapStateToProps';\nimport defaultMergePropsFactories from './mergeProps';\nimport defaultSelectorFactory from './selectorFactory';\n/*\r\n connect is a facade over connectAdvanced. It turns its args into a compatible\r\n selectorFactory, which has the signature:\r\n\r\n (dispatch, options) => (nextState, nextOwnProps) => nextFinalProps\r\n \r\n connect passes its args to connectAdvanced as options, which will in turn pass them to\r\n selectorFactory each time a Connect component instance is instantiated or hot reloaded.\r\n\r\n selectorFactory returns a final props selector from its mapStateToProps,\r\n mapStateToPropsFactories, mapDispatchToProps, mapDispatchToPropsFactories, mergeProps,\r\n mergePropsFactories, and pure args.\r\n\r\n The resulting final props selector is called by the Connect component instance whenever\r\n it receives new props or store state.\r\n */\n\nfunction match(arg, factories, name) {\n for (var i = factories.length - 1; i >= 0; i--) {\n var result = factories[i](arg);\n if (result) return result;\n }\n\n return function (dispatch, options) {\n throw new Error(\"Invalid value of type \" + typeof arg + \" for \" + name + \" argument when connecting component \" + options.wrappedComponentName + \".\");\n };\n}\n\nfunction strictEqual(a, b) {\n return a === b;\n} // createConnect with default args builds the 'official' connect behavior. Calling it with\n// different options opens up some testing and extensibility scenarios\n\n\nexport function createConnect(_temp) {\n var _ref = _temp === void 0 ? {} : _temp,\n _ref$connectHOC = _ref.connectHOC,\n connectHOC = _ref$connectHOC === void 0 ? connectAdvanced : _ref$connectHOC,\n _ref$mapStateToPropsF = _ref.mapStateToPropsFactories,\n mapStateToPropsFactories = _ref$mapStateToPropsF === void 0 ? defaultMapStateToPropsFactories : _ref$mapStateToPropsF,\n _ref$mapDispatchToPro = _ref.mapDispatchToPropsFactories,\n mapDispatchToPropsFactories = _ref$mapDispatchToPro === void 0 ? defaultMapDispatchToPropsFactories : _ref$mapDispatchToPro,\n _ref$mergePropsFactor = _ref.mergePropsFactories,\n mergePropsFactories = _ref$mergePropsFactor === void 0 ? defaultMergePropsFactories : _ref$mergePropsFactor,\n _ref$selectorFactory = _ref.selectorFactory,\n selectorFactory = _ref$selectorFactory === void 0 ? defaultSelectorFactory : _ref$selectorFactory;\n\n return function connect(mapStateToProps, mapDispatchToProps, mergeProps, _ref2) {\n if (_ref2 === void 0) {\n _ref2 = {};\n }\n\n var _ref3 = _ref2,\n _ref3$pure = _ref3.pure,\n pure = _ref3$pure === void 0 ? true : _ref3$pure,\n _ref3$areStatesEqual = _ref3.areStatesEqual,\n areStatesEqual = _ref3$areStatesEqual === void 0 ? strictEqual : _ref3$areStatesEqual,\n _ref3$areOwnPropsEqua = _ref3.areOwnPropsEqual,\n areOwnPropsEqual = _ref3$areOwnPropsEqua === void 0 ? shallowEqual : _ref3$areOwnPropsEqua,\n _ref3$areStatePropsEq = _ref3.areStatePropsEqual,\n areStatePropsEqual = _ref3$areStatePropsEq === void 0 ? shallowEqual : _ref3$areStatePropsEq,\n _ref3$areMergedPropsE = _ref3.areMergedPropsEqual,\n areMergedPropsEqual = _ref3$areMergedPropsE === void 0 ? shallowEqual : _ref3$areMergedPropsE,\n extraOptions = _objectWithoutPropertiesLoose(_ref3, [\"pure\", \"areStatesEqual\", \"areOwnPropsEqual\", \"areStatePropsEqual\", \"areMergedPropsEqual\"]);\n\n var initMapStateToProps = match(mapStateToProps, mapStateToPropsFactories, 'mapStateToProps');\n var initMapDispatchToProps = match(mapDispatchToProps, mapDispatchToPropsFactories, 'mapDispatchToProps');\n var initMergeProps = match(mergeProps, mergePropsFactories, 'mergeProps');\n return connectHOC(selectorFactory, _extends({\n // used in error messages\n methodName: 'connect',\n // used to compute Connect's displayName from the wrapped component's displayName.\n getDisplayName: function getDisplayName(name) {\n return \"Connect(\" + name + \")\";\n },\n // if mapStateToProps is falsy, the Connect component doesn't subscribe to store state changes\n shouldHandleStateChanges: Boolean(mapStateToProps),\n // passed through to selectorFactory\n initMapStateToProps: initMapStateToProps,\n initMapDispatchToProps: initMapDispatchToProps,\n initMergeProps: initMergeProps,\n pure: pure,\n areStatesEqual: areStatesEqual,\n areOwnPropsEqual: areOwnPropsEqual,\n areStatePropsEqual: areStatePropsEqual,\n areMergedPropsEqual: areMergedPropsEqual\n }, extraOptions));\n };\n}\nexport default\n/*#__PURE__*/\ncreateConnect();","import { useReducer, useRef, useMemo, useContext } from 'react';\nimport { useReduxContext as useDefaultReduxContext } from './useReduxContext';\nimport Subscription from '../utils/Subscription';\nimport { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect';\nimport { ReactReduxContext } from '../components/Context';\n\nvar refEquality = function refEquality(a, b) {\n return a === b;\n};\n\nfunction useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub) {\n var _useReducer = useReducer(function (s) {\n return s + 1;\n }, 0),\n forceRender = _useReducer[1];\n\n var subscription = useMemo(function () {\n return new Subscription(store, contextSub);\n }, [store, contextSub]);\n var latestSubscriptionCallbackError = useRef();\n var latestSelector = useRef();\n var latestSelectedState = useRef();\n var selectedState;\n\n try {\n if (selector !== latestSelector.current || latestSubscriptionCallbackError.current) {\n selectedState = selector(store.getState());\n } else {\n selectedState = latestSelectedState.current;\n }\n } catch (err) {\n if (latestSubscriptionCallbackError.current) {\n err.message += \"\\nThe error may be correlated with this previous error:\\n\" + latestSubscriptionCallbackError.current.stack + \"\\n\\n\";\n }\n\n throw err;\n }\n\n useIsomorphicLayoutEffect(function () {\n latestSelector.current = selector;\n latestSelectedState.current = selectedState;\n latestSubscriptionCallbackError.current = undefined;\n });\n useIsomorphicLayoutEffect(function () {\n function checkForUpdates() {\n try {\n var newSelectedState = latestSelector.current(store.getState());\n\n if (equalityFn(newSelectedState, latestSelectedState.current)) {\n return;\n }\n\n latestSelectedState.current = newSelectedState;\n } catch (err) {\n // we ignore all errors here, since when the component\n // is re-rendered, the selectors are called again, and\n // will throw again, if neither props nor store state\n // changed\n latestSubscriptionCallbackError.current = err;\n }\n\n forceRender({});\n }\n\n subscription.onStateChange = checkForUpdates;\n subscription.trySubscribe();\n checkForUpdates();\n return function () {\n return subscription.tryUnsubscribe();\n };\n }, [store, subscription]);\n return selectedState;\n}\n/**\r\n * Hook factory, which creates a `useSelector` hook bound to a given context.\r\n *\r\n * @param {React.Context} [context=ReactReduxContext] Context passed to your `<Provider>`.\r\n * @returns {Function} A `useSelector` hook bound to the specified context.\r\n */\n\n\nexport function createSelectorHook(context) {\n if (context === void 0) {\n context = ReactReduxContext;\n }\n\n var useReduxContext = context === ReactReduxContext ? useDefaultReduxContext : function () {\n return useContext(context);\n };\n return function useSelector(selector, equalityFn) {\n if (equalityFn === void 0) {\n equalityFn = refEquality;\n }\n\n if (process.env.NODE_ENV !== 'production' && !selector) {\n throw new Error(\"You must pass a selector to useSelectors\");\n }\n\n var _useReduxContext = useReduxContext(),\n store = _useReduxContext.store,\n contextSub = _useReduxContext.subscription;\n\n return useSelectorWithStoreAndSubscription(selector, equalityFn, store, contextSub);\n };\n}\n/**\r\n * A hook to access the redux store's state. This hook takes a selector function\r\n * as an argument. The selector is called with the store state.\r\n *\r\n * This hook takes an optional equality comparison function as the second parameter\r\n * that allows you to customize the way the selected state is compared to determine\r\n * whether the component needs to be re-rendered.\r\n *\r\n * @param {Function} selector the selector function\r\n * @param {Function=} equalityFn the function that will be used to determine equality\r\n *\r\n * @returns {any} the selected state\r\n *\r\n * @example\r\n *\r\n * import React from 'react'\r\n * import { useSelector } from 'react-redux'\r\n *\r\n * export const CounterComponent = () => {\r\n * const counter = useSelector(state => state.counter)\r\n * return <div>{counter}</div>\r\n * }\r\n */\n\nexport var useSelector =\n/*#__PURE__*/\ncreateSelectorHook();","import Provider from './components/Provider';\nimport connectAdvanced from './components/connectAdvanced';\nimport { ReactReduxContext } from './components/Context';\nimport connect from './connect/connect';\nimport { useDispatch, createDispatchHook } from './hooks/useDispatch';\nimport { useSelector, createSelectorHook } from './hooks/useSelector';\nimport { useStore, createStoreHook } from './hooks/useStore';\nimport { setBatch } from './utils/batch';\nimport { unstable_batchedUpdates as batch } from './utils/reactBatchedUpdates';\nimport shallowEqual from './utils/shallowEqual';\nsetBatch(batch);\nexport { Provider, connectAdvanced, ReactReduxContext, connect, batch, useDispatch, createDispatchHook, useSelector, createSelectorHook, useStore, createStoreHook, shallowEqual };","export default function _setPrototypeOf(o, p) {\n _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n o.__proto__ = p;\n return o;\n };\n\n return _setPrototypeOf(o, p);\n}","import setPrototypeOf from \"./setPrototypeOf\";\nexport default function _inherits(subClass, superClass) {\n if (typeof superClass !== \"function\" && superClass !== null) {\n throw new TypeError(\"Super expression must either be null or a function\");\n }\n\n subClass.prototype = Object.create(superClass && superClass.prototype, {\n constructor: {\n value: subClass,\n writable: true,\n configurable: true\n }\n });\n if (superClass) setPrototypeOf(subClass, superClass);\n}","function _typeof2(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof2 = function _typeof2(obj) { return typeof obj; }; } else { _typeof2 = function _typeof2(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof2(obj); }\n\nexport default function _typeof(obj) {\n if (typeof Symbol === \"function\" && _typeof2(Symbol.iterator) === \"symbol\") {\n _typeof = function _typeof(obj) {\n return _typeof2(obj);\n };\n } else {\n _typeof = function _typeof(obj) {\n return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : _typeof2(obj);\n };\n }\n\n return _typeof(obj);\n}","import _typeof from \"../../helpers/esm/typeof\";\nimport assertThisInitialized from \"./assertThisInitialized\";\nexport default function _possibleConstructorReturn(self, call) {\n if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n return call;\n }\n\n return assertThisInitialized(self);\n}","export default function _objectWithoutPropertiesLoose(source, excluded) {\n if (source == null) return {};\n var target = {};\n var sourceKeys = Object.keys(source);\n var key, i;\n\n for (i = 0; i < sourceKeys.length; i++) {\n key = sourceKeys[i];\n if (excluded.indexOf(key) >= 0) continue;\n target[key] = source[key];\n }\n\n return target;\n}","export default function _assertThisInitialized(self) {\n if (self === void 0) {\n throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n }\n\n return self;\n}","export default function _inheritsLoose(subClass, superClass) {\n subClass.prototype = Object.create(superClass.prototype);\n subClass.prototype.constructor = subClass;\n subClass.__proto__ = superClass;\n}","import $$observable from 'symbol-observable';\n\n/**\n * These are private action types reserved by Redux.\n * For any unknown actions, you must return the current state.\n * If the current state is undefined, you must return the initial state.\n * Do not reference these action types directly in your code.\n */\nvar randomString = function randomString() {\n return Math.random().toString(36).substring(7).split('').join('.');\n};\n\nvar ActionTypes = {\n INIT: \"@@redux/INIT\" + randomString(),\n REPLACE: \"@@redux/REPLACE\" + randomString(),\n PROBE_UNKNOWN_ACTION: function PROBE_UNKNOWN_ACTION() {\n return \"@@redux/PROBE_UNKNOWN_ACTION\" + randomString();\n }\n};\n\n/**\n * @param {any} obj The object to inspect.\n * @returns {boolean} True if the argument appears to be a plain object.\n */\nfunction isPlainObject(obj) {\n if (typeof obj !== 'object' || obj === null) return false;\n var proto = obj;\n\n while (Object.getPrototypeOf(proto) !== null) {\n proto = Object.getPrototypeOf(proto);\n }\n\n return Object.getPrototypeOf(obj) === proto;\n}\n\n/**\n * Creates a Redux store that holds the state tree.\n * The only way to change the data in the store is to call `dispatch()` on it.\n *\n * There should only be a single store in your app. To specify how different\n * parts of the state tree respond to actions, you may combine several reducers\n * into a single reducer function by using `combineReducers`.\n *\n * @param {Function} reducer A function that returns the next state tree, given\n * the current state tree and the action to handle.\n *\n * @param {any} [preloadedState] The initial state. You may optionally specify it\n * to hydrate the state from the server in universal apps, or to restore a\n * previously serialized user session.\n * If you use `combineReducers` to produce the root reducer function, this must be\n * an object with the same shape as `combineReducers` keys.\n *\n * @param {Function} [enhancer] The store enhancer. You may optionally specify it\n * to enhance the store with third-party capabilities such as middleware,\n * time travel, persistence, etc. The only store enhancer that ships with Redux\n * is `applyMiddleware()`.\n *\n * @returns {Store} A Redux store that lets you read the state, dispatch actions\n * and subscribe to changes.\n */\n\nfunction createStore(reducer, preloadedState, enhancer) {\n var _ref2;\n\n if (typeof preloadedState === 'function' && typeof enhancer === 'function' || typeof enhancer === 'function' && typeof arguments[3] === 'function') {\n throw new Error('It looks like you are passing several store enhancers to ' + 'createStore(). This is not supported. Instead, compose them ' + 'together to a single function.');\n }\n\n if (typeof preloadedState === 'function' && typeof enhancer === 'undefined') {\n enhancer = preloadedState;\n preloadedState = undefined;\n }\n\n if (typeof enhancer !== 'undefined') {\n if (typeof enhancer !== 'function') {\n throw new Error('Expected the enhancer to be a function.');\n }\n\n return enhancer(createStore)(reducer, preloadedState);\n }\n\n if (typeof reducer !== 'function') {\n throw new Error('Expected the reducer to be a function.');\n }\n\n var currentReducer = reducer;\n var currentState = preloadedState;\n var currentListeners = [];\n var nextListeners = currentListeners;\n var isDispatching = false;\n /**\n * This makes a shallow copy of currentListeners so we can use\n * nextListeners as a temporary list while dispatching.\n *\n * This prevents any bugs around consumers calling\n * subscribe/unsubscribe in the middle of a dispatch.\n */\n\n function ensureCanMutateNextListeners() {\n if (nextListeners === currentListeners) {\n nextListeners = currentListeners.slice();\n }\n }\n /**\n * Reads the state tree managed by the store.\n *\n * @returns {any} The current state tree of your application.\n */\n\n\n function getState() {\n if (isDispatching) {\n throw new Error('You may not call store.getState() while the reducer is executing. ' + 'The reducer has already received the state as an argument. ' + 'Pass it down from the top reducer instead of reading it from the store.');\n }\n\n return currentState;\n }\n /**\n * Adds a change listener. It will be called any time an action is dispatched,\n * and some part of the state tree may potentially have changed. You may then\n * call `getState()` to read the current state tree inside the callback.\n *\n * You may call `dispatch()` from a change listener, with the following\n * caveats:\n *\n * 1. The subscriptions are snapshotted just before every `dispatch()` call.\n * If you subscribe or unsubscribe while the listeners are being invoked, this\n * will not have any effect on the `dispatch()` that is currently in progress.\n * However, the next `dispatch()` call, whether nested or not, will use a more\n * recent snapshot of the subscription list.\n *\n * 2. The listener should not expect to see all state changes, as the state\n * might have been updated multiple times during a nested `dispatch()` before\n * the listener is called. It is, however, guaranteed that all subscribers\n * registered before the `dispatch()` started will be called with the latest\n * state by the time it exits.\n *\n * @param {Function} listener A callback to be invoked on every dispatch.\n * @returns {Function} A function to remove this change listener.\n */\n\n\n function subscribe(listener) {\n if (typeof listener !== 'function') {\n throw new Error('Expected the listener to be a function.');\n }\n\n if (isDispatching) {\n throw new Error('You may not call store.subscribe() while the reducer is executing. ' + 'If you would like to be notified after the store has been updated, subscribe from a ' + 'component and invoke store.getState() in the callback to access the latest state. ' + 'See https://redux.js.org/api-reference/store#subscribelistener for more details.');\n }\n\n var isSubscribed = true;\n ensureCanMutateNextListeners();\n nextListeners.push(listener);\n return function unsubscribe() {\n if (!isSubscribed) {\n return;\n }\n\n if (isDispatching) {\n throw new Error('You may not unsubscribe from a store listener while the reducer is executing. ' + 'See https://redux.js.org/api-reference/store#subscribelistener for more details.');\n }\n\n isSubscribed = false;\n ensureCanMutateNextListeners();\n var index = nextListeners.indexOf(listener);\n nextListeners.splice(index, 1);\n currentListeners = null;\n };\n }\n /**\n * Dispatches an action. It is the only way to trigger a state change.\n *\n * The `reducer` function, used to create the store, will be called with the\n * current state tree and the given `action`. Its return value will\n * be considered the **next** state of the tree, and the change listeners\n * will be notified.\n *\n * The base implementation only supports plain object actions. If you want to\n * dispatch a Promise, an Observable, a thunk, or something else, you need to\n * wrap your store creating function into the corresponding middleware. For\n * example, see the documentation for the `redux-thunk` package. Even the\n * middleware will eventually dispatch plain object actions using this method.\n *\n * @param {Object} action A plain object representing “what changed”. It is\n * a good idea to keep actions serializable so you can record and replay user\n * sessions, or use the time travelling `redux-devtools`. An action must have\n * a `type` property which may not be `undefined`. It is a good idea to use\n * string constants for action types.\n *\n * @returns {Object} For convenience, the same action object you dispatched.\n *\n * Note that, if you use a custom middleware, it may wrap `dispatch()` to\n * return something else (for example, a Promise you can await).\n */\n\n\n function dispatch(action) {\n if (!isPlainObject(action)) {\n throw new Error('Actions must be plain objects. ' + 'Use custom middleware for async actions.');\n }\n\n if (typeof action.type === 'undefined') {\n throw new Error('Actions may not have an undefined \"type\" property. ' + 'Have you misspelled a constant?');\n }\n\n if (isDispatching) {\n throw new Error('Reducers may not dispatch actions.');\n }\n\n try {\n isDispatching = true;\n currentState = currentReducer(currentState, action);\n } finally {\n isDispatching = false;\n }\n\n var listeners = currentListeners = nextListeners;\n\n for (var i = 0; i < listeners.length; i++) {\n var listener = listeners[i];\n listener();\n }\n\n return action;\n }\n /**\n * Replaces the reducer currently used by the store to calculate the state.\n *\n * You might need this if your app implements code splitting and you want to\n * load some of the reducers dynamically. You might also need this if you\n * implement a hot reloading mechanism for Redux.\n *\n * @param {Function} nextReducer The reducer for the store to use instead.\n * @returns {void}\n */\n\n\n function replaceReducer(nextReducer) {\n if (typeof nextReducer !== 'function') {\n throw new Error('Expected the nextReducer to be a function.');\n }\n\n currentReducer = nextReducer; // This action has a similiar effect to ActionTypes.INIT.\n // Any reducers that existed in both the new and old rootReducer\n // will receive the previous state. This effectively populates\n // the new state tree with any relevant data from the old one.\n\n dispatch({\n type: ActionTypes.REPLACE\n });\n }\n /**\n * Interoperability point for observable/reactive libraries.\n * @returns {observable} A minimal observable of state changes.\n * For more information, see the observable proposal:\n * https://github.com/tc39/proposal-observable\n */\n\n\n function observable() {\n var _ref;\n\n var outerSubscribe = subscribe;\n return _ref = {\n /**\n * The minimal observable subscription method.\n * @param {Object} observer Any object that can be used as an observer.\n * The observer object should have a `next` method.\n * @returns {subscription} An object with an `unsubscribe` method that can\n * be used to unsubscribe the observable from the store, and prevent further\n * emission of values from the observable.\n */\n subscribe: function subscribe(observer) {\n if (typeof observer !== 'object' || observer === null) {\n throw new TypeError('Expected the observer to be an object.');\n }\n\n function observeState() {\n if (observer.next) {\n observer.next(getState());\n }\n }\n\n observeState();\n var unsubscribe = outerSubscribe(observeState);\n return {\n unsubscribe: unsubscribe\n };\n }\n }, _ref[$$observable] = function () {\n return this;\n }, _ref;\n } // When a store is created, an \"INIT\" action is dispatched so that every\n // reducer returns their initial state. This effectively populates\n // the initial state tree.\n\n\n dispatch({\n type: ActionTypes.INIT\n });\n return _ref2 = {\n dispatch: dispatch,\n subscribe: subscribe,\n getState: getState,\n replaceReducer: replaceReducer\n }, _ref2[$$observable] = observable, _ref2;\n}\n\n/**\n * Prints a warning in the console if it exists.\n *\n * @param {String} message The warning message.\n * @returns {void}\n */\nfunction warning(message) {\n /* eslint-disable no-console */\n if (typeof console !== 'undefined' && typeof console.error === 'function') {\n console.error(message);\n }\n /* eslint-enable no-console */\n\n\n try {\n // This error was thrown as a convenience so that if you enable\n // \"break on all exceptions\" in your console,\n // it would pause the execution at this line.\n throw new Error(message);\n } catch (e) {} // eslint-disable-line no-empty\n\n}\n\nfunction getUndefinedStateErrorMessage(key, action) {\n var actionType = action && action.type;\n var actionDescription = actionType && \"action \\\"\" + String(actionType) + \"\\\"\" || 'an action';\n return \"Given \" + actionDescription + \", reducer \\\"\" + key + \"\\\" returned undefined. \" + \"To ignore an action, you must explicitly return the previous state. \" + \"If you want this reducer to hold no value, you can return null instead of undefined.\";\n}\n\nfunction getUnexpectedStateShapeWarningMessage(inputState, reducers, action, unexpectedKeyCache) {\n var reducerKeys = Object.keys(reducers);\n var argumentName = action && action.type === ActionTypes.INIT ? 'preloadedState argument passed to createStore' : 'previous state received by the reducer';\n\n if (reducerKeys.length === 0) {\n return 'Store does not have a valid reducer. Make sure the argument passed ' + 'to combineReducers is an object whose values are reducers.';\n }\n\n if (!isPlainObject(inputState)) {\n return \"The \" + argumentName + \" has unexpected type of \\\"\" + {}.toString.call(inputState).match(/\\s([a-z|A-Z]+)/)[1] + \"\\\". Expected argument to be an object with the following \" + (\"keys: \\\"\" + reducerKeys.join('\", \"') + \"\\\"\");\n }\n\n var unexpectedKeys = Object.keys(inputState).filter(function (key) {\n return !reducers.hasOwnProperty(key) && !unexpectedKeyCache[key];\n });\n unexpectedKeys.forEach(function (key) {\n unexpectedKeyCache[key] = true;\n });\n if (action && action.type === ActionTypes.REPLACE) return;\n\n if (unexpectedKeys.length > 0) {\n return \"Unexpected \" + (unexpectedKeys.length > 1 ? 'keys' : 'key') + \" \" + (\"\\\"\" + unexpectedKeys.join('\", \"') + \"\\\" found in \" + argumentName + \". \") + \"Expected to find one of the known reducer keys instead: \" + (\"\\\"\" + reducerKeys.join('\", \"') + \"\\\". Unexpected keys will be ignored.\");\n }\n}\n\nfunction assertReducerShape(reducers) {\n Object.keys(reducers).forEach(function (key) {\n var reducer = reducers[key];\n var initialState = reducer(undefined, {\n type: ActionTypes.INIT\n });\n\n if (typeof initialState === 'undefined') {\n throw new Error(\"Reducer \\\"\" + key + \"\\\" returned undefined during initialization. \" + \"If the state passed to the reducer is undefined, you must \" + \"explicitly return the initial state. The initial state may \" + \"not be undefined. If you don't want to set a value for this reducer, \" + \"you can use null instead of undefined.\");\n }\n\n if (typeof reducer(undefined, {\n type: ActionTypes.PROBE_UNKNOWN_ACTION()\n }) === 'undefined') {\n throw new Error(\"Reducer \\\"\" + key + \"\\\" returned undefined when probed with a random type. \" + (\"Don't try to handle \" + ActionTypes.INIT + \" or other actions in \\\"redux/*\\\" \") + \"namespace. They are considered private. Instead, you must return the \" + \"current state for any unknown actions, unless it is undefined, \" + \"in which case you must return the initial state, regardless of the \" + \"action type. The initial state may not be undefined, but can be null.\");\n }\n });\n}\n/**\n * Turns an object whose values are different reducer functions, into a single\n * reducer function. It will call every child reducer, and gather their results\n * into a single state object, whose keys correspond to the keys of the passed\n * reducer functions.\n *\n * @param {Object} reducers An object whose values correspond to different\n * reducer functions that need to be combined into one. One handy way to obtain\n * it is to use ES6 `import * as reducers` syntax. The reducers may never return\n * undefined for any action. Instead, they should return their initial state\n * if the state passed to them was undefined, and the current state for any\n * unrecognized action.\n *\n * @returns {Function} A reducer function that invokes every reducer inside the\n * passed object, and builds a state object with the same shape.\n */\n\n\nfunction combineReducers(reducers) {\n var reducerKeys = Object.keys(reducers);\n var finalReducers = {};\n\n for (var i = 0; i < reducerKeys.length; i++) {\n var key = reducerKeys[i];\n\n if (process.env.NODE_ENV !== 'production') {\n if (typeof reducers[key] === 'undefined') {\n warning(\"No reducer provided for key \\\"\" + key + \"\\\"\");\n }\n }\n\n if (typeof reducers[key] === 'function') {\n finalReducers[key] = reducers[key];\n }\n }\n\n var finalReducerKeys = Object.keys(finalReducers); // This is used to make sure we don't warn about the same\n // keys multiple times.\n\n var unexpectedKeyCache;\n\n if (process.env.NODE_ENV !== 'production') {\n unexpectedKeyCache = {};\n }\n\n var shapeAssertionError;\n\n try {\n assertReducerShape(finalReducers);\n } catch (e) {\n shapeAssertionError = e;\n }\n\n return function combination(state, action) {\n if (state === void 0) {\n state = {};\n }\n\n if (shapeAssertionError) {\n throw shapeAssertionError;\n }\n\n if (process.env.NODE_ENV !== 'production') {\n var warningMessage = getUnexpectedStateShapeWarningMessage(state, finalReducers, action, unexpectedKeyCache);\n\n if (warningMessage) {\n warning(warningMessage);\n }\n }\n\n var hasChanged = false;\n var nextState = {};\n\n for (var _i = 0; _i < finalReducerKeys.length; _i++) {\n var _key = finalReducerKeys[_i];\n var reducer = finalReducers[_key];\n var previousStateForKey = state[_key];\n var nextStateForKey = reducer(previousStateForKey, action);\n\n if (typeof nextStateForKey === 'undefined') {\n var errorMessage = getUndefinedStateErrorMessage(_key, action);\n throw new Error(errorMessage);\n }\n\n nextState[_key] = nextStateForKey;\n hasChanged = hasChanged || nextStateForKey !== previousStateForKey;\n }\n\n hasChanged = hasChanged || finalReducerKeys.length !== Object.keys(state).length;\n return hasChanged ? nextState : state;\n };\n}\n\nfunction bindActionCreator(actionCreator, dispatch) {\n return function () {\n return dispatch(actionCreator.apply(this, arguments));\n };\n}\n/**\n * Turns an object whose values are action creators, into an object with the\n * same keys, but with every function wrapped into a `dispatch` call so they\n * may be invoked directly. This is just a convenience method, as you can call\n * `store.dispatch(MyActionCreators.doSomething())` yourself just fine.\n *\n * For convenience, you can also pass an action creator as the first argument,\n * and get a dispatch wrapped function in return.\n *\n * @param {Function|Object} actionCreators An object whose values are action\n * creator functions. One handy way to obtain it is to use ES6 `import * as`\n * syntax. You may also pass a single function.\n *\n * @param {Function} dispatch The `dispatch` function available on your Redux\n * store.\n *\n * @returns {Function|Object} The object mimicking the original object, but with\n * every action creator wrapped into the `dispatch` call. If you passed a\n * function as `actionCreators`, the return value will also be a single\n * function.\n */\n\n\nfunction bindActionCreators(actionCreators, dispatch) {\n if (typeof actionCreators === 'function') {\n return bindActionCreator(actionCreators, dispatch);\n }\n\n if (typeof actionCreators !== 'object' || actionCreators === null) {\n throw new Error(\"bindActionCreators expected an object or a function, instead received \" + (actionCreators === null ? 'null' : typeof actionCreators) + \". \" + \"Did you write \\\"import ActionCreators from\\\" instead of \\\"import * as ActionCreators from\\\"?\");\n }\n\n var boundActionCreators = {};\n\n for (var key in actionCreators) {\n var actionCreator = actionCreators[key];\n\n if (typeof actionCreator === 'function') {\n boundActionCreators[key] = bindActionCreator(actionCreator, dispatch);\n }\n }\n\n return boundActionCreators;\n}\n\nfunction _defineProperty(obj, key, value) {\n if (key in obj) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n } else {\n obj[key] = value;\n }\n\n return obj;\n}\n\nfunction ownKeys(object, enumerableOnly) {\n var keys = Object.keys(object);\n\n if (Object.getOwnPropertySymbols) {\n keys.push.apply(keys, Object.getOwnPropertySymbols(object));\n }\n\n if (enumerableOnly) keys = keys.filter(function (sym) {\n return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n });\n return keys;\n}\n\nfunction _objectSpread2(target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i] != null ? arguments[i] : {};\n\n if (i % 2) {\n ownKeys(source, true).forEach(function (key) {\n _defineProperty(target, key, source[key]);\n });\n } else if (Object.getOwnPropertyDescriptors) {\n Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n } else {\n ownKeys(source).forEach(function (key) {\n Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n });\n }\n }\n\n return target;\n}\n\n/**\n * Composes single-argument functions from right to left. The rightmost\n * function can take multiple arguments as it provides the signature for\n * the resulting composite function.\n *\n * @param {...Function} funcs The functions to compose.\n * @returns {Function} A function obtained by composing the argument functions\n * from right to left. For example, compose(f, g, h) is identical to doing\n * (...args) => f(g(h(...args))).\n */\nfunction compose() {\n for (var _len = arguments.length, funcs = new Array(_len), _key = 0; _key < _len; _key++) {\n funcs[_key] = arguments[_key];\n }\n\n if (funcs.length === 0) {\n return function (arg) {\n return arg;\n };\n }\n\n if (funcs.length === 1) {\n return funcs[0];\n }\n\n return funcs.reduce(function (a, b) {\n return function () {\n return a(b.apply(void 0, arguments));\n };\n });\n}\n\n/**\n * Creates a store enhancer that applies middleware to the dispatch method\n * of the Redux store. This is handy for a variety of tasks, such as expressing\n * asynchronous actions in a concise manner, or logging every action payload.\n *\n * See `redux-thunk` package as an example of the Redux middleware.\n *\n * Because middleware is potentially asynchronous, this should be the first\n * store enhancer in the composition chain.\n *\n * Note that each middleware will be given the `dispatch` and `getState` functions\n * as named arguments.\n *\n * @param {...Function} middlewares The middleware chain to be applied.\n * @returns {Function} A store enhancer applying the middleware.\n */\n\nfunction applyMiddleware() {\n for (var _len = arguments.length, middlewares = new Array(_len), _key = 0; _key < _len; _key++) {\n middlewares[_key] = arguments[_key];\n }\n\n return function (createStore) {\n return function () {\n var store = createStore.apply(void 0, arguments);\n\n var _dispatch = function dispatch() {\n throw new Error('Dispatching while constructing your middleware is not allowed. ' + 'Other middleware would not be applied to this dispatch.');\n };\n\n var middlewareAPI = {\n getState: store.getState,\n dispatch: function dispatch() {\n return _dispatch.apply(void 0, arguments);\n }\n };\n var chain = middlewares.map(function (middleware) {\n return middleware(middlewareAPI);\n });\n _dispatch = compose.apply(void 0, chain)(store.dispatch);\n return _objectSpread2({}, store, {\n dispatch: _dispatch\n });\n };\n };\n}\n\n/*\n * This is a dummy function to check if the function name has been altered by minification.\n * If the function has been minified and NODE_ENV !== 'production', warn the user.\n */\n\nfunction isCrushed() {}\n\nif (process.env.NODE_ENV !== 'production' && typeof isCrushed.name === 'string' && isCrushed.name !== 'isCrushed') {\n warning('You are currently using minified code outside of NODE_ENV === \"production\". ' + 'This means that you are running a slower development build of Redux. ' + 'You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify ' + 'or setting mode to production in webpack (https://webpack.js.org/concepts/mode/) ' + 'to ensure you have the correct code for your production build.');\n}\n\nexport { ActionTypes as __DO_NOT_USE__ActionTypes, applyMiddleware, bindActionCreators, combineReducers, compose, createStore };\n","import _extends from '@babel/runtime/helpers/esm/extends';\nimport resolvePathname from 'resolve-pathname';\nimport valueEqual from 'value-equal';\nimport warning from 'tiny-warning';\nimport invariant from 'tiny-invariant';\n\nfunction addLeadingSlash(path) {\n return path.charAt(0) === '/' ? path : '/' + path;\n}\nfunction stripLeadingSlash(path) {\n return path.charAt(0) === '/' ? path.substr(1) : path;\n}\nfunction hasBasename(path, prefix) {\n return path.toLowerCase().indexOf(prefix.toLowerCase()) === 0 && '/?#'.indexOf(path.charAt(prefix.length)) !== -1;\n}\nfunction stripBasename(path, prefix) {\n return hasBasename(path, prefix) ? path.substr(prefix.length) : path;\n}\nfunction stripTrailingSlash(path) {\n return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;\n}\nfunction parsePath(path) {\n var pathname = path || '/';\n var search = '';\n var hash = '';\n var hashIndex = pathname.indexOf('#');\n\n if (hashIndex !== -1) {\n hash = pathname.substr(hashIndex);\n pathname = pathname.substr(0, hashIndex);\n }\n\n var searchIndex = pathname.indexOf('?');\n\n if (searchIndex !== -1) {\n search = pathname.substr(searchIndex);\n pathname = pathname.substr(0, searchIndex);\n }\n\n return {\n pathname: pathname,\n search: search === '?' ? '' : search,\n hash: hash === '#' ? '' : hash\n };\n}\nfunction createPath(location) {\n var pathname = location.pathname,\n search = location.search,\n hash = location.hash;\n var path = pathname || '/';\n if (search && search !== '?') path += search.charAt(0) === '?' ? search : \"?\" + search;\n if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : \"#\" + hash;\n return path;\n}\n\nfunction createLocation(path, state, key, currentLocation) {\n var location;\n\n if (typeof path === 'string') {\n // Two-arg form: push(path, state)\n location = parsePath(path);\n location.state = state;\n } else {\n // One-arg form: push(location)\n location = _extends({}, path);\n if (location.pathname === undefined) location.pathname = '';\n\n if (location.search) {\n if (location.search.charAt(0) !== '?') location.search = '?' + location.search;\n } else {\n location.search = '';\n }\n\n if (location.hash) {\n if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;\n } else {\n location.hash = '';\n }\n\n if (state !== undefined && location.state === undefined) location.state = state;\n }\n\n try {\n location.pathname = decodeURI(location.pathname);\n } catch (e) {\n if (e instanceof URIError) {\n throw new URIError('Pathname \"' + location.pathname + '\" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');\n } else {\n throw e;\n }\n }\n\n if (key) location.key = key;\n\n if (currentLocation) {\n // Resolve incomplete/relative pathname relative to current location.\n if (!location.pathname) {\n location.pathname = currentLocation.pathname;\n } else if (location.pathname.charAt(0) !== '/') {\n location.pathname = resolvePathname(location.pathname, currentLocation.pathname);\n }\n } else {\n // When there is no prior location and pathname is empty, set it to /\n if (!location.pathname) {\n location.pathname = '/';\n }\n }\n\n return location;\n}\nfunction locationsAreEqual(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);\n}\n\nfunction createTransitionManager() {\n var prompt = null;\n\n function setPrompt(nextPrompt) {\n process.env.NODE_ENV !== \"production\" ? warning(prompt == null, 'A history supports only one prompt at a time') : void 0;\n prompt = nextPrompt;\n return function () {\n if (prompt === nextPrompt) prompt = null;\n };\n }\n\n function confirmTransitionTo(location, action, getUserConfirmation, callback) {\n // TODO: If another transition starts while we're still confirming\n // the previous one, we may end up in a weird state. Figure out the\n // best way to handle this.\n if (prompt != null) {\n var result = typeof prompt === 'function' ? prompt(location, action) : prompt;\n\n if (typeof result === 'string') {\n if (typeof getUserConfirmation === 'function') {\n getUserConfirmation(result, callback);\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'A history needs a getUserConfirmation function in order to use a prompt message') : void 0;\n callback(true);\n }\n } else {\n // Return false from a transition hook to cancel the transition.\n callback(result !== false);\n }\n } else {\n callback(true);\n }\n }\n\n var listeners = [];\n\n function appendListener(fn) {\n var isActive = true;\n\n function listener() {\n if (isActive) fn.apply(void 0, arguments);\n }\n\n listeners.push(listener);\n return function () {\n isActive = false;\n listeners = listeners.filter(function (item) {\n return item !== listener;\n });\n };\n }\n\n function notifyListeners() {\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n listeners.forEach(function (listener) {\n return listener.apply(void 0, args);\n });\n }\n\n return {\n setPrompt: setPrompt,\n confirmTransitionTo: confirmTransitionTo,\n appendListener: appendListener,\n notifyListeners: notifyListeners\n };\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);\nfunction getConfirmation(message, callback) {\n callback(window.confirm(message)); // eslint-disable-line no-alert\n}\n/**\n * Returns true if the HTML5 history API is supported. Taken from Modernizr.\n *\n * https://github.com/Modernizr/Modernizr/blob/master/LICENSE\n * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js\n * changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586\n */\n\nfunction supportsHistory() {\n var ua = window.navigator.userAgent;\n if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;\n return window.history && 'pushState' in window.history;\n}\n/**\n * Returns true if browser fires popstate on hash change.\n * IE10 and IE11 do not.\n */\n\nfunction supportsPopStateOnHashChange() {\n return window.navigator.userAgent.indexOf('Trident') === -1;\n}\n/**\n * Returns false if using go(n) with hash history causes a full page reload.\n */\n\nfunction supportsGoWithoutReloadUsingHash() {\n return window.navigator.userAgent.indexOf('Firefox') === -1;\n}\n/**\n * Returns true if a given popstate event is an extraneous WebKit event.\n * Accounts for the fact that Chrome on iOS fires real popstate events\n * containing undefined state when pressing the back button.\n */\n\nfunction isExtraneousPopstateEvent(event) {\n return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;\n}\n\nvar PopStateEvent = 'popstate';\nvar HashChangeEvent = 'hashchange';\n\nfunction getHistoryState() {\n try {\n return window.history.state || {};\n } catch (e) {\n // IE 11 sometimes throws when accessing window.history.state\n // See https://github.com/ReactTraining/history/pull/289\n return {};\n }\n}\n/**\n * Creates a history object that uses the HTML5 history API including\n * pushState, replaceState, and the popstate event.\n */\n\n\nfunction createBrowserHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Browser history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canUseHistory = supportsHistory();\n var needsHashChangeListener = !supportsPopStateOnHashChange();\n var _props = props,\n _props$forceRefresh = _props.forceRefresh,\n forceRefresh = _props$forceRefresh === void 0 ? false : _props$forceRefresh,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n\n function getDOMLocation(historyState) {\n var _ref = historyState || {},\n key = _ref.key,\n state = _ref.state;\n\n var _window$location = window.location,\n pathname = _window$location.pathname,\n search = _window$location.search,\n hash = _window$location.hash;\n var path = pathname + search + hash;\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path, state, key);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function handlePopState(event) {\n // Ignore extraneous popstate events in WebKit.\n if (isExtraneousPopstateEvent(event)) return;\n handlePop(getDOMLocation(event.state));\n }\n\n function handleHashChange() {\n handlePop(getDOMLocation(getHistoryState()));\n }\n\n var forceNextPop = false;\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of keys we've seen in sessionStorage.\n // Instead, we just default to 0 for keys we don't know.\n\n var toIndex = allKeys.indexOf(toLocation.key);\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allKeys.indexOf(fromLocation.key);\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n }\n\n var initialLocation = getDOMLocation(getHistoryState());\n var allKeys = [initialLocation.key]; // Public interface\n\n function createHref(location) {\n return basename + createPath(location);\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.pushState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.href = href;\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n var nextKeys = allKeys.slice(0, prevIndex + 1);\n nextKeys.push(location.key);\n allKeys = nextKeys;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history') : void 0;\n window.location.href = href;\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var href = createHref(location);\n var key = location.key,\n state = location.state;\n\n if (canUseHistory) {\n globalHistory.replaceState({\n key: key,\n state: state\n }, null, href);\n\n if (forceRefresh) {\n window.location.replace(href);\n } else {\n var prevIndex = allKeys.indexOf(history.location.key);\n if (prevIndex !== -1) allKeys[prevIndex] = location.key;\n setState({\n action: action,\n location: location\n });\n }\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history') : void 0;\n window.location.replace(href);\n }\n });\n }\n\n function go(n) {\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.addEventListener(HashChangeEvent, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(PopStateEvent, handlePopState);\n if (needsHashChangeListener) window.removeEventListener(HashChangeEvent, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nvar HashChangeEvent$1 = 'hashchange';\nvar HashPathCoders = {\n hashbang: {\n encodePath: function encodePath(path) {\n return path.charAt(0) === '!' ? path : '!/' + stripLeadingSlash(path);\n },\n decodePath: function decodePath(path) {\n return path.charAt(0) === '!' ? path.substr(1) : path;\n }\n },\n noslash: {\n encodePath: stripLeadingSlash,\n decodePath: addLeadingSlash\n },\n slash: {\n encodePath: addLeadingSlash,\n decodePath: addLeadingSlash\n }\n};\n\nfunction stripHash(url) {\n var hashIndex = url.indexOf('#');\n return hashIndex === -1 ? url : url.slice(0, hashIndex);\n}\n\nfunction getHashPath() {\n // We can't use window.location.hash here because it's not\n // consistent across browsers - Firefox will pre-decode it!\n var href = window.location.href;\n var hashIndex = href.indexOf('#');\n return hashIndex === -1 ? '' : href.substring(hashIndex + 1);\n}\n\nfunction pushHashPath(path) {\n window.location.hash = path;\n}\n\nfunction replaceHashPath(path) {\n window.location.replace(stripHash(window.location.href) + '#' + path);\n}\n\nfunction createHashHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Hash history needs a DOM') : invariant(false) : void 0;\n var globalHistory = window.history;\n var canGoWithoutReload = supportsGoWithoutReloadUsingHash();\n var _props = props,\n _props$getUserConfirm = _props.getUserConfirmation,\n getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n _props$hashType = _props.hashType,\n hashType = _props$hashType === void 0 ? 'slash' : _props$hashType;\n var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n var _HashPathCoders$hashT = HashPathCoders[hashType],\n encodePath = _HashPathCoders$hashT.encodePath,\n decodePath = _HashPathCoders$hashT.decodePath;\n\n function getDOMLocation() {\n var path = decodePath(getHashPath());\n process.env.NODE_ENV !== \"production\" ? warning(!basename || hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path \"' + path + '\" to begin with \"' + basename + '\".') : void 0;\n if (basename) path = stripBasename(path, basename);\n return createLocation(path);\n }\n\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = globalHistory.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n var forceNextPop = false;\n var ignorePath = null;\n\n function locationsAreEqual$$1(a, b) {\n return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash;\n }\n\n function handleHashChange() {\n var path = getHashPath();\n var encodedPath = encodePath(path);\n\n if (path !== encodedPath) {\n // Ensure we always have a properly-encoded hash.\n replaceHashPath(encodedPath);\n } else {\n var location = getDOMLocation();\n var prevLocation = history.location;\n if (!forceNextPop && locationsAreEqual$$1(prevLocation, location)) return; // A hashchange doesn't always == location change.\n\n if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.\n\n ignorePath = null;\n handlePop(location);\n }\n }\n\n function handlePop(location) {\n if (forceNextPop) {\n forceNextPop = false;\n setState();\n } else {\n var action = 'POP';\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location\n });\n } else {\n revertPop(location);\n }\n });\n }\n }\n\n function revertPop(fromLocation) {\n var toLocation = history.location; // TODO: We could probably make this more reliable by\n // keeping a list of paths we've seen in sessionStorage.\n // Instead, we just default to 0 for paths we don't know.\n\n var toIndex = allPaths.lastIndexOf(createPath(toLocation));\n if (toIndex === -1) toIndex = 0;\n var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));\n if (fromIndex === -1) fromIndex = 0;\n var delta = toIndex - fromIndex;\n\n if (delta) {\n forceNextPop = true;\n go(delta);\n }\n } // Ensure the hash is encoded properly before doing anything else.\n\n\n var path = getHashPath();\n var encodedPath = encodePath(path);\n if (path !== encodedPath) replaceHashPath(encodedPath);\n var initialLocation = getDOMLocation();\n var allPaths = [createPath(initialLocation)]; // Public interface\n\n function createHref(location) {\n var baseTag = document.querySelector('base');\n var href = '';\n\n if (baseTag && baseTag.getAttribute('href')) {\n href = stripHash(window.location.href);\n }\n\n return href + '#' + encodePath(basename + createPath(location));\n }\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot push state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a PUSH, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n pushHashPath(encodedPath);\n var prevIndex = allPaths.lastIndexOf(createPath(history.location));\n var nextPaths = allPaths.slice(0, prevIndex + 1);\n nextPaths.push(path);\n allPaths = nextPaths;\n setState({\n action: action,\n location: location\n });\n } else {\n process.env.NODE_ENV !== \"production\" ? warning(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack') : void 0;\n setState();\n }\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot replace state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, undefined, undefined, history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var path = createPath(location);\n var encodedPath = encodePath(basename + path);\n var hashChanged = getHashPath() !== encodedPath;\n\n if (hashChanged) {\n // We cannot tell if a hashchange was caused by a REPLACE, so we'd\n // rather setState here and ignore the hashchange. The caveat here\n // is that other hash histories in the page will consider it a POP.\n ignorePath = path;\n replaceHashPath(encodedPath);\n }\n\n var prevIndex = allPaths.indexOf(createPath(history.location));\n if (prevIndex !== -1) allPaths[prevIndex] = path;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n process.env.NODE_ENV !== \"production\" ? warning(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser') : void 0;\n globalHistory.go(n);\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n var listenerCount = 0;\n\n function checkDOMListeners(delta) {\n listenerCount += delta;\n\n if (listenerCount === 1 && delta === 1) {\n window.addEventListener(HashChangeEvent$1, handleHashChange);\n } else if (listenerCount === 0) {\n window.removeEventListener(HashChangeEvent$1, handleHashChange);\n }\n }\n\n var isBlocked = false;\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n var unblock = transitionManager.setPrompt(prompt);\n\n if (!isBlocked) {\n checkDOMListeners(1);\n isBlocked = true;\n }\n\n return function () {\n if (isBlocked) {\n isBlocked = false;\n checkDOMListeners(-1);\n }\n\n return unblock();\n };\n }\n\n function listen(listener) {\n var unlisten = transitionManager.appendListener(listener);\n checkDOMListeners(1);\n return function () {\n checkDOMListeners(-1);\n unlisten();\n };\n }\n\n var history = {\n length: globalHistory.length,\n action: 'POP',\n location: initialLocation,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n block: block,\n listen: listen\n };\n return history;\n}\n\nfunction clamp(n, lowerBound, upperBound) {\n return Math.min(Math.max(n, lowerBound), upperBound);\n}\n/**\n * Creates a history object that stores locations in memory.\n */\n\n\nfunction createMemoryHistory(props) {\n if (props === void 0) {\n props = {};\n }\n\n var _props = props,\n getUserConfirmation = _props.getUserConfirmation,\n _props$initialEntries = _props.initialEntries,\n initialEntries = _props$initialEntries === void 0 ? ['/'] : _props$initialEntries,\n _props$initialIndex = _props.initialIndex,\n initialIndex = _props$initialIndex === void 0 ? 0 : _props$initialIndex,\n _props$keyLength = _props.keyLength,\n keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n var transitionManager = createTransitionManager();\n\n function setState(nextState) {\n _extends(history, nextState);\n\n history.length = history.entries.length;\n transitionManager.notifyListeners(history.location, history.action);\n }\n\n function createKey() {\n return Math.random().toString(36).substr(2, keyLength);\n }\n\n var index = clamp(initialIndex, 0, initialEntries.length - 1);\n var entries = initialEntries.map(function (entry) {\n return typeof entry === 'string' ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key || createKey());\n }); // Public interface\n\n var createHref = createPath;\n\n function push(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'PUSH';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n var prevIndex = history.index;\n var nextIndex = prevIndex + 1;\n var nextEntries = history.entries.slice(0);\n\n if (nextEntries.length > nextIndex) {\n nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);\n } else {\n nextEntries.push(location);\n }\n\n setState({\n action: action,\n location: location,\n index: nextIndex,\n entries: nextEntries\n });\n });\n }\n\n function replace(path, state) {\n process.env.NODE_ENV !== \"production\" ? warning(!(typeof path === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;\n var action = 'REPLACE';\n var location = createLocation(path, state, createKey(), history.location);\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (!ok) return;\n history.entries[history.index] = location;\n setState({\n action: action,\n location: location\n });\n });\n }\n\n function go(n) {\n var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);\n var action = 'POP';\n var location = history.entries[nextIndex];\n transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n if (ok) {\n setState({\n action: action,\n location: location,\n index: nextIndex\n });\n } else {\n // Mimic the behavior of DOM histories by\n // causing a render after a cancelled POP.\n setState();\n }\n });\n }\n\n function goBack() {\n go(-1);\n }\n\n function goForward() {\n go(1);\n }\n\n function canGo(n) {\n var nextIndex = history.index + n;\n return nextIndex >= 0 && nextIndex < history.entries.length;\n }\n\n function block(prompt) {\n if (prompt === void 0) {\n prompt = false;\n }\n\n return transitionManager.setPrompt(prompt);\n }\n\n function listen(listener) {\n return transitionManager.appendListener(listener);\n }\n\n var history = {\n length: entries.length,\n action: 'POP',\n location: entries[index],\n index: index,\n entries: entries,\n createHref: createHref,\n push: push,\n replace: replace,\n go: go,\n goBack: goBack,\n goForward: goForward,\n canGo: canGo,\n block: block,\n listen: listen\n };\n return history;\n}\n\nexport { createBrowserHistory, createHashHistory, createMemoryHistory, createLocation, locationsAreEqual, parsePath, createPath };\n","import React, { Component } from 'react';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport PropTypes from 'prop-types';\nimport gud from 'gud';\nimport warning from 'tiny-warning';\n\nvar MAX_SIGNED_31_BIT_INT = 1073741823;\n\nfunction objectIs(x, y) {\n if (x === y) {\n return x !== 0 || 1 / x === 1 / y;\n } else {\n return x !== x && y !== y;\n }\n}\n\nfunction createEventEmitter(value) {\n var handlers = [];\n return {\n on: function on(handler) {\n handlers.push(handler);\n },\n off: function off(handler) {\n handlers = handlers.filter(function (h) {\n return h !== handler;\n });\n },\n get: function get() {\n return value;\n },\n set: function set(newValue, changedBits) {\n value = newValue;\n handlers.forEach(function (handler) {\n return handler(value, changedBits);\n });\n }\n };\n}\n\nfunction onlyChild(children) {\n return Array.isArray(children) ? children[0] : children;\n}\n\nfunction createReactContext(defaultValue, calculateChangedBits) {\n var _Provider$childContex, _Consumer$contextType;\n\n var contextProp = '__create-react-context-' + gud() + '__';\n\n var Provider =\n /*#__PURE__*/\n function (_Component) {\n _inheritsLoose(Provider, _Component);\n\n function Provider() {\n var _this;\n\n _this = _Component.apply(this, arguments) || this;\n _this.emitter = createEventEmitter(_this.props.value);\n return _this;\n }\n\n var _proto = Provider.prototype;\n\n _proto.getChildContext = function getChildContext() {\n var _ref;\n\n return _ref = {}, _ref[contextProp] = this.emitter, _ref;\n };\n\n _proto.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n if (this.props.value !== nextProps.value) {\n var oldValue = this.props.value;\n var newValue = nextProps.value;\n var changedBits;\n\n if (objectIs(oldValue, newValue)) {\n changedBits = 0;\n } else {\n changedBits = typeof calculateChangedBits === 'function' ? calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;\n\n if (process.env.NODE_ENV !== 'production') {\n warning((changedBits & MAX_SIGNED_31_BIT_INT) === changedBits, 'calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: ' + changedBits);\n }\n\n changedBits |= 0;\n\n if (changedBits !== 0) {\n this.emitter.set(nextProps.value, changedBits);\n }\n }\n }\n };\n\n _proto.render = function render() {\n return this.props.children;\n };\n\n return Provider;\n }(Component);\n\n Provider.childContextTypes = (_Provider$childContex = {}, _Provider$childContex[contextProp] = PropTypes.object.isRequired, _Provider$childContex);\n\n var Consumer =\n /*#__PURE__*/\n function (_Component2) {\n _inheritsLoose(Consumer, _Component2);\n\n function Consumer() {\n var _this2;\n\n _this2 = _Component2.apply(this, arguments) || this;\n _this2.state = {\n value: _this2.getValue()\n };\n\n _this2.onUpdate = function (newValue, changedBits) {\n var observedBits = _this2.observedBits | 0;\n\n if ((observedBits & changedBits) !== 0) {\n _this2.setState({\n value: _this2.getValue()\n });\n }\n };\n\n return _this2;\n }\n\n var _proto2 = Consumer.prototype;\n\n _proto2.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n var observedBits = nextProps.observedBits;\n this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n };\n\n _proto2.componentDidMount = function componentDidMount() {\n if (this.context[contextProp]) {\n this.context[contextProp].on(this.onUpdate);\n }\n\n var observedBits = this.props.observedBits;\n this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n };\n\n _proto2.componentWillUnmount = function componentWillUnmount() {\n if (this.context[contextProp]) {\n this.context[contextProp].off(this.onUpdate);\n }\n };\n\n _proto2.getValue = function getValue() {\n if (this.context[contextProp]) {\n return this.context[contextProp].get();\n } else {\n return defaultValue;\n }\n };\n\n _proto2.render = function render() {\n return onlyChild(this.props.children)(this.state.value);\n };\n\n return Consumer;\n }(Component);\n\n Consumer.contextTypes = (_Consumer$contextType = {}, _Consumer$contextType[contextProp] = PropTypes.object, _Consumer$contextType);\n return {\n Provider: Provider,\n Consumer: Consumer\n };\n}\n\nvar index = React.createContext || createReactContext;\n\nexport default index;\n","// TODO: Replace with React.createContext once we can assume React 16+\nimport createContext from \"mini-create-react-context\";\n\nconst createNamedContext = name => {\n const context = createContext();\n context.displayName = name;\n\n return context;\n};\n\nconst context = /*#__PURE__*/ createNamedContext(\"Router\");\nexport default context;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\n\n/**\n * The public API for putting history on context.\n */\nclass Router extends React.Component {\n static computeRootMatch(pathname) {\n return { path: \"/\", url: \"/\", params: {}, isExact: pathname === \"/\" };\n }\n\n constructor(props) {\n super(props);\n\n this.state = {\n location: props.history.location\n };\n\n // This is a bit of a hack. We have to start listening for location\n // changes here in the constructor in case there are any <Redirect>s\n // on the initial render. If there are, they will replace/push when\n // they mount and since cDM fires in children before parents, we may\n // get a new location before the <Router> is mounted.\n this._isMounted = false;\n this._pendingLocation = null;\n\n if (!props.staticContext) {\n this.unlisten = props.history.listen(location => {\n if (this._isMounted) {\n this.setState({ location });\n } else {\n this._pendingLocation = location;\n }\n });\n }\n }\n\n componentDidMount() {\n this._isMounted = true;\n\n if (this._pendingLocation) {\n this.setState({ location: this._pendingLocation });\n }\n }\n\n componentWillUnmount() {\n if (this.unlisten) this.unlisten();\n }\n\n render() {\n return (\n <RouterContext.Provider\n children={this.props.children || null}\n value={{\n history: this.props.history,\n location: this.state.location,\n match: Router.computeRootMatch(this.state.location.pathname),\n staticContext: this.props.staticContext\n }}\n />\n );\n }\n}\n\nif (__DEV__) {\n Router.propTypes = {\n children: PropTypes.node,\n history: PropTypes.object.isRequired,\n staticContext: PropTypes.object\n };\n\n Router.prototype.componentDidUpdate = function(prevProps) {\n warning(\n prevProps.history === this.props.history,\n \"You cannot change <Router history>\"\n );\n };\n}\n\nexport default Router;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createMemoryHistory as createHistory } from \"history\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router\";\n\n/**\n * The public API for a <Router> that stores location in memory.\n */\nclass MemoryRouter extends React.Component {\n history = createHistory(this.props);\n\n render() {\n return <Router history={this.history} children={this.props.children} />;\n }\n}\n\nif (__DEV__) {\n MemoryRouter.propTypes = {\n initialEntries: PropTypes.array,\n initialIndex: PropTypes.number,\n getUserConfirmation: PropTypes.func,\n keyLength: PropTypes.number,\n children: PropTypes.node\n };\n\n MemoryRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<MemoryRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { MemoryRouter as Router }`.\"\n );\n };\n}\n\nexport default MemoryRouter;\n","import React from \"react\";\n\nclass Lifecycle extends React.Component {\n componentDidMount() {\n if (this.props.onMount) this.props.onMount.call(this, this);\n }\n\n componentDidUpdate(prevProps) {\n if (this.props.onUpdate) this.props.onUpdate.call(this, this, prevProps);\n }\n\n componentWillUnmount() {\n if (this.props.onUnmount) this.props.onUnmount.call(this, this);\n }\n\n render() {\n return null;\n }\n}\n\nexport default Lifecycle;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path) {\n if (cache[path]) return cache[path];\n\n const generator = pathToRegexp.compile(path);\n\n if (cacheCount < cacheLimit) {\n cache[path] = generator;\n cacheCount++;\n }\n\n return generator;\n}\n\n/**\n * Public API for generating a URL pathname from a path and parameters.\n */\nfunction generatePath(path = \"/\", params = {}) {\n return path === \"/\" ? path : compilePath(path)(params, { pretty: true });\n}\n\nexport default generatePath;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, locationsAreEqual } from \"history\";\nimport invariant from \"tiny-invariant\";\n\nimport Lifecycle from \"./Lifecycle\";\nimport RouterContext from \"./RouterContext\";\nimport generatePath from \"./generatePath\";\n\n/**\n * The public API for navigating programmatically with a component.\n */\nfunction Redirect({ computedMatch, to, push = false }) {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Redirect> outside a <Router>\");\n\n const { history, staticContext } = context;\n\n const method = push ? history.push : history.replace;\n const location = createLocation(\n computedMatch\n ? typeof to === \"string\"\n ? generatePath(to, computedMatch.params)\n : {\n ...to,\n pathname: generatePath(to.pathname, computedMatch.params)\n }\n : to\n );\n\n // When rendering in a static context,\n // set the new location immediately.\n if (staticContext) {\n method(location);\n return null;\n }\n\n return (\n <Lifecycle\n onMount={() => {\n method(location);\n }}\n onUpdate={(self, prevProps) => {\n const prevLocation = createLocation(prevProps.to);\n if (\n !locationsAreEqual(prevLocation, {\n ...location,\n key: prevLocation.key\n })\n ) {\n method(location);\n }\n }}\n to={to}\n />\n );\n }}\n </RouterContext.Consumer>\n );\n}\n\nif (__DEV__) {\n Redirect.propTypes = {\n push: PropTypes.bool,\n from: PropTypes.string,\n to: PropTypes.oneOfType([PropTypes.string, PropTypes.object]).isRequired\n };\n}\n\nexport default Redirect;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path, options) {\n const cacheKey = `${options.end}${options.strict}${options.sensitive}`;\n const pathCache = cache[cacheKey] || (cache[cacheKey] = {});\n\n if (pathCache[path]) return pathCache[path];\n\n const keys = [];\n const regexp = pathToRegexp(path, keys, options);\n const result = { regexp, keys };\n\n if (cacheCount < cacheLimit) {\n pathCache[path] = result;\n cacheCount++;\n }\n\n return result;\n}\n\n/**\n * Public API for matching a URL pathname to a path.\n */\nfunction matchPath(pathname, options = {}) {\n if (typeof options === \"string\" || Array.isArray(options)) {\n options = { path: options };\n }\n\n const { path, exact = false, strict = false, sensitive = false } = options;\n\n const paths = [].concat(path);\n\n return paths.reduce((matched, path) => {\n if (!path && path !== \"\") return null;\n if (matched) return matched;\n\n const { regexp, keys } = compilePath(path, {\n end: exact,\n strict,\n sensitive\n });\n const match = regexp.exec(pathname);\n\n if (!match) return null;\n\n const [url, ...values] = match;\n const isExact = pathname === url;\n\n if (exact && !isExact) return null;\n\n return {\n path, // the path used to match\n url: path === \"/\" && url === \"\" ? \"/\" : url, // the matched portion of the URL\n isExact, // whether or not we matched exactly\n params: keys.reduce((memo, key, index) => {\n memo[key.name] = values[index];\n return memo;\n }, {})\n };\n }, null);\n}\n\nexport default matchPath;\n","import React from \"react\";\nimport { isValidElementType } from \"react-is\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\nimport matchPath from \"./matchPath\";\n\nfunction isEmptyChildren(children) {\n return React.Children.count(children) === 0;\n}\n\nfunction evalChildrenDev(children, props, path) {\n const value = children(props);\n\n warning(\n value !== undefined,\n \"You returned `undefined` from the `children` function of \" +\n `<Route${path ? ` path=\"${path}\"` : \"\"}>, but you ` +\n \"should have returned a React element or `null`\"\n );\n\n return value || null;\n}\n\n/**\n * The public API for matching a single path and rendering.\n */\nclass Route extends React.Component {\n render() {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Route> outside a <Router>\");\n\n const location = this.props.location || context.location;\n const match = this.props.computedMatch\n ? this.props.computedMatch // <Switch> already computed the match for us\n : this.props.path\n ? matchPath(location.pathname, this.props)\n : context.match;\n\n const props = { ...context, location, match };\n\n let { children, component, render } = this.props;\n\n // Preact uses an empty array as children by\n // default, so use null if that's the case.\n if (Array.isArray(children) && children.length === 0) {\n children = null;\n }\n\n return (\n <RouterContext.Provider value={props}>\n {props.match\n ? children\n ? typeof children === \"function\"\n ? __DEV__\n ? evalChildrenDev(children, props, this.props.path)\n : children(props)\n : children\n : component\n ? React.createElement(component, props)\n : render\n ? render(props)\n : null\n : typeof children === \"function\"\n ? __DEV__\n ? evalChildrenDev(children, props, this.props.path)\n : children(props)\n : null}\n </RouterContext.Provider>\n );\n }}\n </RouterContext.Consumer>\n );\n }\n}\n\nif (__DEV__) {\n Route.propTypes = {\n children: PropTypes.oneOfType([PropTypes.func, PropTypes.node]),\n component: (props, propName) => {\n if (props[propName] && !isValidElementType(props[propName])) {\n return new Error(\n `Invalid prop 'component' supplied to 'Route': the prop is not a valid React component`\n );\n }\n },\n exact: PropTypes.bool,\n location: PropTypes.object,\n path: PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.arrayOf(PropTypes.string)\n ]),\n render: PropTypes.func,\n sensitive: PropTypes.bool,\n strict: PropTypes.bool\n };\n\n Route.prototype.componentDidMount = function() {\n warning(\n !(\n this.props.children &&\n !isEmptyChildren(this.props.children) &&\n this.props.component\n ),\n \"You should not use <Route component> and <Route children> in the same route; <Route component> will be ignored\"\n );\n\n warning(\n !(\n this.props.children &&\n !isEmptyChildren(this.props.children) &&\n this.props.render\n ),\n \"You should not use <Route render> and <Route children> in the same route; <Route render> will be ignored\"\n );\n\n warning(\n !(this.props.component && this.props.render),\n \"You should not use <Route component> and <Route render> in the same route; <Route render> will be ignored\"\n );\n };\n\n Route.prototype.componentDidUpdate = function(prevProps) {\n warning(\n !(this.props.location && !prevProps.location),\n '<Route> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n );\n\n warning(\n !(!this.props.location && prevProps.location),\n '<Route> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n );\n };\n}\n\nexport default Route;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, createPath } from \"history\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router\";\n\nfunction addLeadingSlash(path) {\n return path.charAt(0) === \"/\" ? path : \"/\" + path;\n}\n\nfunction addBasename(basename, location) {\n if (!basename) return location;\n\n return {\n ...location,\n pathname: addLeadingSlash(basename) + location.pathname\n };\n}\n\nfunction stripBasename(basename, location) {\n if (!basename) return location;\n\n const base = addLeadingSlash(basename);\n\n if (location.pathname.indexOf(base) !== 0) return location;\n\n return {\n ...location,\n pathname: location.pathname.substr(base.length)\n };\n}\n\nfunction createURL(location) {\n return typeof location === \"string\" ? location : createPath(location);\n}\n\nfunction staticHandler(methodName) {\n return () => {\n invariant(false, \"You cannot %s with <StaticRouter>\", methodName);\n };\n}\n\nfunction noop() {}\n\n/**\n * The public top-level API for a \"static\" <Router>, so-called because it\n * can't actually change the current location. Instead, it just records\n * location changes in a context object. Useful mainly in testing and\n * server-rendering scenarios.\n */\nclass StaticRouter extends React.Component {\n navigateTo(location, action) {\n const { basename = \"\", context = {} } = this.props;\n context.action = action;\n context.location = addBasename(basename, createLocation(location));\n context.url = createURL(context.location);\n }\n\n handlePush = location => this.navigateTo(location, \"PUSH\");\n handleReplace = location => this.navigateTo(location, \"REPLACE\");\n handleListen = () => noop;\n handleBlock = () => noop;\n\n render() {\n const { basename = \"\", context = {}, location = \"/\", ...rest } = this.props;\n\n const history = {\n createHref: path => addLeadingSlash(basename + createURL(path)),\n action: \"POP\",\n location: stripBasename(basename, createLocation(location)),\n push: this.handlePush,\n replace: this.handleReplace,\n go: staticHandler(\"go\"),\n goBack: staticHandler(\"goBack\"),\n goForward: staticHandler(\"goForward\"),\n listen: this.handleListen,\n block: this.handleBlock\n };\n\n return <Router {...rest} history={history} staticContext={context} />;\n }\n}\n\nif (__DEV__) {\n StaticRouter.propTypes = {\n basename: PropTypes.string,\n context: PropTypes.object,\n location: PropTypes.oneOfType([PropTypes.string, PropTypes.object])\n };\n\n StaticRouter.prototype.componentDidMount = function() {\n warning(\n !this.props.history,\n \"<StaticRouter> ignores the history prop. To use a custom history, \" +\n \"use `import { Router }` instead of `import { StaticRouter as Router }`.\"\n );\n };\n}\n\nexport default StaticRouter;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext\";\nimport matchPath from \"./matchPath\";\n\n/**\n * The public API for rendering the first <Route> that matches.\n */\nclass Switch extends React.Component {\n render() {\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(context, \"You should not use <Switch> outside a <Router>\");\n\n const location = this.props.location || context.location;\n\n let element, match;\n\n // We use React.Children.forEach instead of React.Children.toArray().find()\n // here because toArray adds keys to all child elements and we do not want\n // to trigger an unmount/remount for two <Route>s that render the same\n // component at different URLs.\n React.Children.forEach(this.props.children, child => {\n if (match == null && React.isValidElement(child)) {\n element = child;\n\n const path = child.props.path || child.props.from;\n\n match = path\n ? matchPath(location.pathname, { ...child.props, path })\n : context.match;\n }\n });\n\n return match\n ? React.cloneElement(element, { location, computedMatch: match })\n : null;\n }}\n </RouterContext.Consumer>\n );\n }\n}\n\nif (__DEV__) {\n Switch.propTypes = {\n children: PropTypes.node,\n location: PropTypes.object\n };\n\n Switch.prototype.componentDidUpdate = function(prevProps) {\n warning(\n !(this.props.location && !prevProps.location),\n '<Switch> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n );\n\n warning(\n !(!this.props.location && prevProps.location),\n '<Switch> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n );\n };\n}\n\nexport default Switch;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport RouterContext from \"./RouterContext\";\nimport hoistStatics from \"hoist-non-react-statics\";\nimport invariant from \"tiny-invariant\";\n\n/**\n * A public higher-order component to access the imperative API\n */\nfunction withRouter(Component) {\n const displayName = `withRouter(${Component.displayName || Component.name})`;\n const C = props => {\n const { wrappedComponentRef, ...remainingProps } = props;\n\n return (\n <RouterContext.Consumer>\n {context => {\n invariant(\n context,\n `You should not use <${displayName} /> outside a <Router>`\n );\n return (\n <Component\n {...remainingProps}\n {...context}\n ref={wrappedComponentRef}\n />\n );\n }}\n </RouterContext.Consumer>\n );\n };\n\n C.displayName = displayName;\n C.WrappedComponent = Component;\n\n if (__DEV__) {\n C.propTypes = {\n wrappedComponentRef: PropTypes.oneOfType([\n PropTypes.string,\n PropTypes.func,\n PropTypes.object\n ])\n };\n }\n\n return hoistStatics(C, Component);\n}\n\nexport default withRouter;\n","import React from \"react\";\nimport invariant from \"tiny-invariant\";\n\nimport Context from \"./RouterContext.js\";\nimport matchPath from \"./matchPath.js\";\n\nconst useContext = React.useContext;\n\nexport function useHistory() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useHistory()\"\n );\n }\n\n return useContext(Context).history;\n}\n\nexport function useLocation() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useLocation()\"\n );\n }\n\n return useContext(Context).location;\n}\n\nexport function useParams() {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useParams()\"\n );\n }\n\n const match = useContext(Context).match;\n return match ? match.params : {};\n}\n\nexport function useRouteMatch(path) {\n if (__DEV__) {\n invariant(\n typeof useContext === \"function\",\n \"You must use React >= 16.8 in order to use useRouteMatch()\"\n );\n }\n\n return path\n ? matchPath(useLocation().pathname, path)\n : useContext(Context).match;\n}\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nif (process.env.NODE_ENV !== 'production') {\n var ReactIs = require('react-is');\n\n // By explicitly using `prop-types` you are opting into new development behavior.\n // http://fb.me/prop-types-in-prod\n var throwOnDirectAccess = true;\n module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);\n} else {\n // By explicitly using `prop-types` you are opting into new production behavior.\n // http://fb.me/prop-types-in-prod\n module.exports = require('./factoryWithThrowingShims')();\n}\n","/*\n * Toastr\n * Copyright 2012-2015\n * Authors: John Papa, Hans Fjällemark, and Tim Ferrell.\n * All Rights Reserved.\n * Use, reproduction, distribution, and modification of this code is subject to the terms and\n * conditions of the MIT license, available at http://www.opensource.org/licenses/mit-license.php\n *\n * ARIA Support: Greta Krafsig\n *\n * Project: https://github.com/CodeSeven/toastr\n */\n/* global define */\n(function (define) {\n define(['jquery'], function ($) {\n return (function () {\n var $container;\n var listener;\n var toastId = 0;\n var toastType = {\n error: 'error',\n info: 'info',\n success: 'success',\n warning: 'warning'\n };\n\n var toastr = {\n clear: clear,\n remove: remove,\n error: error,\n getContainer: getContainer,\n info: info,\n options: {},\n subscribe: subscribe,\n success: success,\n version: '2.1.4',\n warning: warning\n };\n\n var previousToast;\n\n return toastr;\n\n ////////////////\n\n function error(message, title, optionsOverride) {\n return notify({\n type: toastType.error,\n iconClass: getOptions().iconClasses.error,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function getContainer(options, create) {\n if (!options) { options = getOptions(); }\n $container = $('#' + options.containerId);\n if ($container.length) {\n return $container;\n }\n if (create) {\n $container = createContainer(options);\n }\n return $container;\n }\n\n function info(message, title, optionsOverride) {\n return notify({\n type: toastType.info,\n iconClass: getOptions().iconClasses.info,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function subscribe(callback) {\n listener = callback;\n }\n\n function success(message, title, optionsOverride) {\n return notify({\n type: toastType.success,\n iconClass: getOptions().iconClasses.success,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function warning(message, title, optionsOverride) {\n return notify({\n type: toastType.warning,\n iconClass: getOptions().iconClasses.warning,\n message: message,\n optionsOverride: optionsOverride,\n title: title\n });\n }\n\n function clear($toastElement, clearOptions) {\n var options = getOptions();\n if (!$container) { getContainer(options); }\n if (!clearToast($toastElement, options, clearOptions)) {\n clearContainer(options);\n }\n }\n\n function remove($toastElement) {\n var options = getOptions();\n if (!$container) { getContainer(options); }\n if ($toastElement && $(':focus', $toastElement).length === 0) {\n removeToast($toastElement);\n return;\n }\n if ($container.children().length) {\n $container.remove();\n }\n }\n\n // internal functions\n\n function clearContainer (options) {\n var toastsToClear = $container.children();\n for (var i = toastsToClear.length - 1; i >= 0; i--) {\n clearToast($(toastsToClear[i]), options);\n }\n }\n\n function clearToast ($toastElement, options, clearOptions) {\n var force = clearOptions && clearOptions.force ? clearOptions.force : false;\n if ($toastElement && (force || $(':focus', $toastElement).length === 0)) {\n $toastElement[options.hideMethod]({\n duration: options.hideDuration,\n easing: options.hideEasing,\n complete: function () { removeToast($toastElement); }\n });\n return true;\n }\n return false;\n }\n\n function createContainer(options) {\n $container = $('<div/>')\n .attr('id', options.containerId)\n .addClass(options.positionClass);\n\n $container.appendTo($(options.target));\n return $container;\n }\n\n function getDefaults() {\n return {\n tapToDismiss: true,\n toastClass: 'toast',\n containerId: 'toast-container',\n debug: false,\n\n showMethod: 'fadeIn', //fadeIn, slideDown, and show are built into jQuery\n showDuration: 300,\n showEasing: 'swing', //swing and linear are built into jQuery\n onShown: undefined,\n hideMethod: 'fadeOut',\n hideDuration: 1000,\n hideEasing: 'swing',\n onHidden: undefined,\n closeMethod: false,\n closeDuration: false,\n closeEasing: false,\n closeOnHover: true,\n\n extendedTimeOut: 1000,\n iconClasses: {\n error: 'toast-error',\n info: 'toast-info',\n success: 'toast-success',\n warning: 'toast-warning'\n },\n iconClass: 'toast-info',\n positionClass: 'toast-top-right',\n timeOut: 5000, // Set timeOut and extendedTimeOut to 0 to make it sticky\n titleClass: 'toast-title',\n messageClass: 'toast-message',\n escapeHtml: false,\n target: 'body',\n closeHtml: '<button type=\"button\">×</button>',\n closeClass: 'toast-close-button',\n newestOnTop: true,\n preventDuplicates: false,\n progressBar: false,\n progressClass: 'toast-progress',\n rtl: false\n };\n }\n\n function publish(args) {\n if (!listener) { return; }\n listener(args);\n }\n\n function notify(map) {\n var options = getOptions();\n var iconClass = map.iconClass || options.iconClass;\n\n if (typeof (map.optionsOverride) !== 'undefined') {\n options = $.extend(options, map.optionsOverride);\n iconClass = map.optionsOverride.iconClass || iconClass;\n }\n\n if (shouldExit(options, map)) { return; }\n\n toastId++;\n\n $container = getContainer(options, true);\n\n var intervalId = null;\n var $toastElement = $('<div/>');\n var $titleElement = $('<div/>');\n var $messageElement = $('<div/>');\n var $progressElement = $('<div/>');\n var $closeElement = $(options.closeHtml);\n var progressBar = {\n intervalId: null,\n hideEta: null,\n maxHideTime: null\n };\n var response = {\n toastId: toastId,\n state: 'visible',\n startTime: new Date(),\n options: options,\n map: map\n };\n\n personalizeToast();\n\n displayToast();\n\n handleEvents();\n\n publish(response);\n\n if (options.debug && console) {\n console.log(response);\n }\n\n return $toastElement;\n\n function escapeHtml(source) {\n if (source == null) {\n source = '';\n }\n\n return source\n .replace(/&/g, '&')\n .replace(/\"/g, '"')\n .replace(/'/g, ''')\n .replace(/</g, '<')\n .replace(/>/g, '>');\n }\n\n function personalizeToast() {\n setIcon();\n setTitle();\n setMessage();\n setCloseButton();\n setProgressBar();\n setRTL();\n setSequence();\n setAria();\n }\n\n function setAria() {\n var ariaValue = '';\n switch (map.iconClass) {\n case 'toast-success':\n case 'toast-info':\n ariaValue = 'polite';\n break;\n default:\n ariaValue = 'assertive';\n }\n $toastElement.attr('aria-live', ariaValue);\n }\n\n function handleEvents() {\n if (options.closeOnHover) {\n $toastElement.hover(stickAround, delayedHideToast);\n }\n\n if (!options.onclick && options.tapToDismiss) {\n $toastElement.click(hideToast);\n }\n\n if (options.closeButton && $closeElement) {\n $closeElement.click(function (event) {\n if (event.stopPropagation) {\n event.stopPropagation();\n } else if (event.cancelBubble !== undefined && event.cancelBubble !== true) {\n event.cancelBubble = true;\n }\n\n if (options.onCloseClick) {\n options.onCloseClick(event);\n }\n\n hideToast(true);\n });\n }\n\n if (options.onclick) {\n $toastElement.click(function (event) {\n options.onclick(event);\n hideToast();\n });\n }\n }\n\n function displayToast() {\n $toastElement.hide();\n\n $toastElement[options.showMethod](\n {duration: options.showDuration, easing: options.showEasing, complete: options.onShown}\n );\n\n if (options.timeOut > 0) {\n intervalId = setTimeout(hideToast, options.timeOut);\n progressBar.maxHideTime = parseFloat(options.timeOut);\n progressBar.hideEta = new Date().getTime() + progressBar.maxHideTime;\n if (options.progressBar) {\n progressBar.intervalId = setInterval(updateProgress, 10);\n }\n }\n }\n\n function setIcon() {\n if (map.iconClass) {\n $toastElement.addClass(options.toastClass).addClass(iconClass);\n }\n }\n\n function setSequence() {\n if (options.newestOnTop) {\n $container.prepend($toastElement);\n } else {\n $container.append($toastElement);\n }\n }\n\n function setTitle() {\n if (map.title) {\n var suffix = map.title;\n if (options.escapeHtml) {\n suffix = escapeHtml(map.title);\n }\n $titleElement.append(suffix).addClass(options.titleClass);\n $toastElement.append($titleElement);\n }\n }\n\n function setMessage() {\n if (map.message) {\n var suffix = map.message;\n if (options.escapeHtml) {\n suffix = escapeHtml(map.message);\n }\n $messageElement.append(suffix).addClass(options.messageClass);\n $toastElement.append($messageElement);\n }\n }\n\n function setCloseButton() {\n if (options.closeButton) {\n $closeElement.addClass(options.closeClass).attr('role', 'button');\n $toastElement.prepend($closeElement);\n }\n }\n\n function setProgressBar() {\n if (options.progressBar) {\n $progressElement.addClass(options.progressClass);\n $toastElement.prepend($progressElement);\n }\n }\n\n function setRTL() {\n if (options.rtl) {\n $toastElement.addClass('rtl');\n }\n }\n\n function shouldExit(options, map) {\n if (options.preventDuplicates) {\n if (map.message === previousToast) {\n return true;\n } else {\n previousToast = map.message;\n }\n }\n return false;\n }\n\n function hideToast(override) {\n var method = override && options.closeMethod !== false ? options.closeMethod : options.hideMethod;\n var duration = override && options.closeDuration !== false ?\n options.closeDuration : options.hideDuration;\n var easing = override && options.closeEasing !== false ? options.closeEasing : options.hideEasing;\n if ($(':focus', $toastElement).length && !override) {\n return;\n }\n clearTimeout(progressBar.intervalId);\n return $toastElement[method]({\n duration: duration,\n easing: easing,\n complete: function () {\n removeToast($toastElement);\n clearTimeout(intervalId);\n if (options.onHidden && response.state !== 'hidden') {\n options.onHidden();\n }\n response.state = 'hidden';\n response.endTime = new Date();\n publish(response);\n }\n });\n }\n\n function delayedHideToast() {\n if (options.timeOut > 0 || options.extendedTimeOut > 0) {\n intervalId = setTimeout(hideToast, options.extendedTimeOut);\n progressBar.maxHideTime = parseFloat(options.extendedTimeOut);\n progressBar.hideEta = new Date().getTime() + progressBar.maxHideTime;\n }\n }\n\n function stickAround() {\n clearTimeout(intervalId);\n progressBar.hideEta = 0;\n $toastElement.stop(true, true)[options.showMethod](\n {duration: options.showDuration, easing: options.showEasing}\n );\n }\n\n function updateProgress() {\n var percentage = ((progressBar.hideEta - (new Date().getTime())) / progressBar.maxHideTime) * 100;\n $progressElement.width(percentage + '%');\n }\n }\n\n function getOptions() {\n return $.extend({}, getDefaults(), toastr.options);\n }\n\n function removeToast($toastElement) {\n if (!$container) { $container = getContainer(); }\n if ($toastElement.is(':visible')) {\n return;\n }\n $toastElement.remove();\n $toastElement = null;\n if ($container.children().length === 0) {\n $container.remove();\n previousToast = undefined;\n }\n }\n\n })();\n });\n}(typeof define === 'function' && define.amd ? define : function (deps, factory) {\n if (typeof module !== 'undefined' && module.exports) { //Node\n module.exports = factory(require('jquery'));\n } else {\n window.toastr = factory(window.jQuery);\n }\n}));\n","'use strict';\n\nvar reactIs = require('react-is');\n\n/**\n * Copyright 2015, Yahoo! Inc.\n * Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.\n */\nvar REACT_STATICS = {\n childContextTypes: true,\n contextType: true,\n contextTypes: true,\n defaultProps: true,\n displayName: true,\n getDefaultProps: true,\n getDerivedStateFromError: true,\n getDerivedStateFromProps: true,\n mixins: true,\n propTypes: true,\n type: true\n};\nvar KNOWN_STATICS = {\n name: true,\n length: true,\n prototype: true,\n caller: true,\n callee: true,\n arguments: true,\n arity: true\n};\nvar FORWARD_REF_STATICS = {\n '$$typeof': true,\n render: true,\n defaultProps: true,\n displayName: true,\n propTypes: true\n};\nvar MEMO_STATICS = {\n '$$typeof': true,\n compare: true,\n defaultProps: true,\n displayName: true,\n propTypes: true,\n type: true\n};\nvar TYPE_STATICS = {};\nTYPE_STATICS[reactIs.ForwardRef] = FORWARD_REF_STATICS;\nTYPE_STATICS[reactIs.Memo] = MEMO_STATICS;\n\nfunction getStatics(component) {\n // React v16.11 and below\n if (reactIs.isMemo(component)) {\n return MEMO_STATICS;\n } // React v16.12 and above\n\n\n return TYPE_STATICS[component['$$typeof']] || REACT_STATICS;\n}\n\nvar defineProperty = Object.defineProperty;\nvar getOwnPropertyNames = Object.getOwnPropertyNames;\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\nvar getPrototypeOf = Object.getPrototypeOf;\nvar objectPrototype = Object.prototype;\nfunction hoistNonReactStatics(targetComponent, sourceComponent, blacklist) {\n if (typeof sourceComponent !== 'string') {\n // don't hoist over string (html) components\n if (objectPrototype) {\n var inheritedComponent = getPrototypeOf(sourceComponent);\n\n if (inheritedComponent && inheritedComponent !== objectPrototype) {\n hoistNonReactStatics(targetComponent, inheritedComponent, blacklist);\n }\n }\n\n var keys = getOwnPropertyNames(sourceComponent);\n\n if (getOwnPropertySymbols) {\n keys = keys.concat(getOwnPropertySymbols(sourceComponent));\n }\n\n var targetStatics = getStatics(targetComponent);\n var sourceStatics = getStatics(sourceComponent);\n\n for (var i = 0; i < keys.length; ++i) {\n var key = keys[i];\n\n if (!KNOWN_STATICS[key] && !(blacklist && blacklist[key]) && !(sourceStatics && sourceStatics[key]) && !(targetStatics && targetStatics[key])) {\n var descriptor = getOwnPropertyDescriptor(sourceComponent, key);\n\n try {\n // Avoid failures from read-only properties\n defineProperty(targetComponent, key, descriptor);\n } catch (e) {}\n }\n }\n }\n\n return targetComponent;\n}\n\nmodule.exports = hoistNonReactStatics;\n","module.exports = require(\"regenerator-runtime\");\n","'use strict';\n\nfunction checkDCE() {\n /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */\n if (\n typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' ||\n typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'\n ) {\n return;\n }\n if (process.env.NODE_ENV !== 'production') {\n // This branch is unreachable because this function is only called\n // in production, but the condition is true only in development.\n // Therefore if the branch is still here, dead code elimination wasn't\n // properly applied.\n // Don't change the message. React DevTools relies on it. Also make sure\n // this message doesn't occur elsewhere in this function, or it will cause\n // a false positive.\n throw new Error('^_^');\n }\n try {\n // Verify that the code above has been dead code eliminated (DCE'd).\n __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);\n } catch (err) {\n // DevTools shouldn't crash React, no matter what.\n // We should still report in case we break this code.\n console.error(err);\n }\n}\n\nif (process.env.NODE_ENV === 'production') {\n // DCE check should happen before ReactDOM bundle executes so that\n // DevTools can report bad minification during injection.\n checkDCE();\n module.exports = require('./cjs/react-dom.production.min.js');\n} else {\n module.exports = require('./cjs/react-dom.development.js');\n}\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react-is.production.min.js');\n} else {\n module.exports = require('./cjs/react-is.development.js');\n}\n","function isAbsolute(pathname) {\n return pathname.charAt(0) === '/';\n}\n\n// About 1.5x faster than the two-arg version of Array#splice()\nfunction spliceOne(list, index) {\n for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1) {\n list[i] = list[k];\n }\n\n list.pop();\n}\n\n// This implementation is based heavily on node's url.parse\nfunction resolvePathname(to, from) {\n if (from === undefined) from = '';\n\n var toParts = (to && to.split('/')) || [];\n var fromParts = (from && from.split('/')) || [];\n\n var isToAbs = to && isAbsolute(to);\n var isFromAbs = from && isAbsolute(from);\n var mustEndAbs = isToAbs || isFromAbs;\n\n if (to && isAbsolute(to)) {\n // to is absolute\n fromParts = toParts;\n } else if (toParts.length) {\n // to is relative, drop the filename\n fromParts.pop();\n fromParts = fromParts.concat(toParts);\n }\n\n if (!fromParts.length) return '/';\n\n var hasTrailingSlash;\n if (fromParts.length) {\n var last = fromParts[fromParts.length - 1];\n hasTrailingSlash = last === '.' || last === '..' || last === '';\n } else {\n hasTrailingSlash = false;\n }\n\n var up = 0;\n for (var i = fromParts.length; i >= 0; i--) {\n var part = fromParts[i];\n\n if (part === '.') {\n spliceOne(fromParts, i);\n } else if (part === '..') {\n spliceOne(fromParts, i);\n up++;\n } else if (up) {\n spliceOne(fromParts, i);\n up--;\n }\n }\n\n if (!mustEndAbs) for (; up--; up) fromParts.unshift('..');\n\n if (\n mustEndAbs &&\n fromParts[0] !== '' &&\n (!fromParts[0] || !isAbsolute(fromParts[0]))\n )\n fromParts.unshift('');\n\n var result = fromParts.join('/');\n\n if (hasTrailingSlash && result.substr(-1) !== '/') result += '/';\n\n return result;\n}\n\nexport default resolvePathname;\n","function valueOf(obj) {\n return obj.valueOf ? obj.valueOf() : Object.prototype.valueOf.call(obj);\n}\n\nfunction valueEqual(a, b) {\n // Test for strict equality first.\n if (a === b) return true;\n\n // Otherwise, if either of them == null they are not equal.\n if (a == null || b == null) return false;\n\n if (Array.isArray(a)) {\n return (\n Array.isArray(b) &&\n a.length === b.length &&\n a.every(function(item, index) {\n return valueEqual(item, b[index]);\n })\n );\n }\n\n if (typeof a === 'object' || typeof b === 'object') {\n var aValue = valueOf(a);\n var bValue = valueOf(b);\n\n if (aValue !== a || bValue !== b) return valueEqual(aValue, bValue);\n\n return Object.keys(Object.assign({}, a, b)).every(function(key) {\n return valueEqual(a[key], b[key]);\n });\n }\n\n return false;\n}\n\nexport default valueEqual;\n","export default function _defineProperty(obj, key, value) {\n if (key in obj) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n } else {\n obj[key] = value;\n }\n\n return obj;\n}","import defineProperty from \"./defineProperty\";\n\nfunction ownKeys(object, enumerableOnly) {\n var keys = Object.keys(object);\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(object);\n if (enumerableOnly) symbols = symbols.filter(function (sym) {\n return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n });\n keys.push.apply(keys, symbols);\n }\n\n return keys;\n}\n\nexport default function _objectSpread2(target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i] != null ? arguments[i] : {};\n\n if (i % 2) {\n ownKeys(Object(source), true).forEach(function (key) {\n defineProperty(target, key, source[key]);\n });\n } else if (Object.getOwnPropertyDescriptors) {\n Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n } else {\n ownKeys(Object(source)).forEach(function (key) {\n Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n });\n }\n }\n\n return target;\n}","function _setPrototypeOf(o, p) {\n module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n o.__proto__ = p;\n return o;\n };\n\n return _setPrototypeOf(o, p);\n}\n\nmodule.exports = _setPrototypeOf;","function _getPrototypeOf(o) {\n module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n return o.__proto__ || Object.getPrototypeOf(o);\n };\n return _getPrototypeOf(o);\n}\n\nmodule.exports = _getPrototypeOf;","/* global window */\nimport ponyfill from './ponyfill.js';\n\nvar root;\n\nif (typeof self !== 'undefined') {\n root = self;\n} else if (typeof window !== 'undefined') {\n root = window;\n} else if (typeof global !== 'undefined') {\n root = global;\n} else if (typeof module !== 'undefined') {\n root = module;\n} else {\n root = Function('return this')();\n}\n\nvar result = ponyfill(root);\nexport default result;\n","function _inheritsLoose(subClass, superClass) {\n subClass.prototype = Object.create(superClass.prototype);\n subClass.prototype.constructor = subClass;\n subClass.__proto__ = superClass;\n}\n\nmodule.exports = _inheritsLoose;","var isarray = require('isarray')\n\n/**\n * Expose `pathToRegexp`.\n */\nmodule.exports = pathToRegexp\nmodule.exports.parse = parse\nmodule.exports.compile = compile\nmodule.exports.tokensToFunction = tokensToFunction\nmodule.exports.tokensToRegExp = tokensToRegExp\n\n/**\n * The main path matching regexp utility.\n *\n * @type {RegExp}\n */\nvar PATH_REGEXP = new RegExp([\n // Match escaped characters that would otherwise appear in future matches.\n // This allows the user to escape special characters that won't transform.\n '(\\\\\\\\.)',\n // Match Express-style parameters and un-named parameters with a prefix\n // and optional suffixes. Matches appear as:\n //\n // \"/:test(\\\\d+)?\" => [\"/\", \"test\", \"\\d+\", undefined, \"?\", undefined]\n // \"/route(\\\\d+)\" => [undefined, undefined, undefined, \"\\d+\", undefined, undefined]\n // \"/*\" => [\"/\", undefined, undefined, undefined, undefined, \"*\"]\n '([\\\\/.])?(?:(?:\\\\:(\\\\w+)(?:\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))?|\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))([+*?])?|(\\\\*))'\n].join('|'), 'g')\n\n/**\n * Parse a string for the raw tokens.\n *\n * @param {string} str\n * @param {Object=} options\n * @return {!Array}\n */\nfunction parse (str, options) {\n var tokens = []\n var key = 0\n var index = 0\n var path = ''\n var defaultDelimiter = options && options.delimiter || '/'\n var res\n\n while ((res = PATH_REGEXP.exec(str)) != null) {\n var m = res[0]\n var escaped = res[1]\n var offset = res.index\n path += str.slice(index, offset)\n index = offset + m.length\n\n // Ignore already escaped sequences.\n if (escaped) {\n path += escaped[1]\n continue\n }\n\n var next = str[index]\n var prefix = res[2]\n var name = res[3]\n var capture = res[4]\n var group = res[5]\n var modifier = res[6]\n var asterisk = res[7]\n\n // Push the current path onto the tokens.\n if (path) {\n tokens.push(path)\n path = ''\n }\n\n var partial = prefix != null && next != null && next !== prefix\n var repeat = modifier === '+' || modifier === '*'\n var optional = modifier === '?' || modifier === '*'\n var delimiter = res[2] || defaultDelimiter\n var pattern = capture || group\n\n tokens.push({\n name: name || key++,\n prefix: prefix || '',\n delimiter: delimiter,\n optional: optional,\n repeat: repeat,\n partial: partial,\n asterisk: !!asterisk,\n pattern: pattern ? escapeGroup(pattern) : (asterisk ? '.*' : '[^' + escapeString(delimiter) + ']+?')\n })\n }\n\n // Match any characters still remaining.\n if (index < str.length) {\n path += str.substr(index)\n }\n\n // If the path exists, push it onto the end.\n if (path) {\n tokens.push(path)\n }\n\n return tokens\n}\n\n/**\n * Compile a string to a template function for the path.\n *\n * @param {string} str\n * @param {Object=} options\n * @return {!function(Object=, Object=)}\n */\nfunction compile (str, options) {\n return tokensToFunction(parse(str, options), options)\n}\n\n/**\n * Prettier encoding of URI path segments.\n *\n * @param {string}\n * @return {string}\n */\nfunction encodeURIComponentPretty (str) {\n return encodeURI(str).replace(/[\\/?#]/g, function (c) {\n return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n })\n}\n\n/**\n * Encode the asterisk parameter. Similar to `pretty`, but allows slashes.\n *\n * @param {string}\n * @return {string}\n */\nfunction encodeAsterisk (str) {\n return encodeURI(str).replace(/[?#]/g, function (c) {\n return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n })\n}\n\n/**\n * Expose a method for transforming tokens into the path function.\n */\nfunction tokensToFunction (tokens, options) {\n // Compile all the tokens into regexps.\n var matches = new Array(tokens.length)\n\n // Compile all the patterns before compilation.\n for (var i = 0; i < tokens.length; i++) {\n if (typeof tokens[i] === 'object') {\n matches[i] = new RegExp('^(?:' + tokens[i].pattern + ')$', flags(options))\n }\n }\n\n return function (obj, opts) {\n var path = ''\n var data = obj || {}\n var options = opts || {}\n var encode = options.pretty ? encodeURIComponentPretty : encodeURIComponent\n\n for (var i = 0; i < tokens.length; i++) {\n var token = tokens[i]\n\n if (typeof token === 'string') {\n path += token\n\n continue\n }\n\n var value = data[token.name]\n var segment\n\n if (value == null) {\n if (token.optional) {\n // Prepend partial segment prefixes.\n if (token.partial) {\n path += token.prefix\n }\n\n continue\n } else {\n throw new TypeError('Expected \"' + token.name + '\" to be defined')\n }\n }\n\n if (isarray(value)) {\n if (!token.repeat) {\n throw new TypeError('Expected \"' + token.name + '\" to not repeat, but received `' + JSON.stringify(value) + '`')\n }\n\n if (value.length === 0) {\n if (token.optional) {\n continue\n } else {\n throw new TypeError('Expected \"' + token.name + '\" to not be empty')\n }\n }\n\n for (var j = 0; j < value.length; j++) {\n segment = encode(value[j])\n\n if (!matches[i].test(segment)) {\n throw new TypeError('Expected all \"' + token.name + '\" to match \"' + token.pattern + '\", but received `' + JSON.stringify(segment) + '`')\n }\n\n path += (j === 0 ? token.prefix : token.delimiter) + segment\n }\n\n continue\n }\n\n segment = token.asterisk ? encodeAsterisk(value) : encode(value)\n\n if (!matches[i].test(segment)) {\n throw new TypeError('Expected \"' + token.name + '\" to match \"' + token.pattern + '\", but received \"' + segment + '\"')\n }\n\n path += token.prefix + segment\n }\n\n return path\n }\n}\n\n/**\n * Escape a regular expression string.\n *\n * @param {string} str\n * @return {string}\n */\nfunction escapeString (str) {\n return str.replace(/([.+*?=^!:${}()[\\]|\\/\\\\])/g, '\\\\$1')\n}\n\n/**\n * Escape the capturing group by escaping special characters and meaning.\n *\n * @param {string} group\n * @return {string}\n */\nfunction escapeGroup (group) {\n return group.replace(/([=!:$\\/()])/g, '\\\\$1')\n}\n\n/**\n * Attach the keys as a property of the regexp.\n *\n * @param {!RegExp} re\n * @param {Array} keys\n * @return {!RegExp}\n */\nfunction attachKeys (re, keys) {\n re.keys = keys\n return re\n}\n\n/**\n * Get the flags for a regexp from the options.\n *\n * @param {Object} options\n * @return {string}\n */\nfunction flags (options) {\n return options && options.sensitive ? '' : 'i'\n}\n\n/**\n * Pull out keys from a regexp.\n *\n * @param {!RegExp} path\n * @param {!Array} keys\n * @return {!RegExp}\n */\nfunction regexpToRegexp (path, keys) {\n // Use a negative lookahead to match only capturing groups.\n var groups = path.source.match(/\\((?!\\?)/g)\n\n if (groups) {\n for (var i = 0; i < groups.length; i++) {\n keys.push({\n name: i,\n prefix: null,\n delimiter: null,\n optional: false,\n repeat: false,\n partial: false,\n asterisk: false,\n pattern: null\n })\n }\n }\n\n return attachKeys(path, keys)\n}\n\n/**\n * Transform an array into a regexp.\n *\n * @param {!Array} path\n * @param {Array} keys\n * @param {!Object} options\n * @return {!RegExp}\n */\nfunction arrayToRegexp (path, keys, options) {\n var parts = []\n\n for (var i = 0; i < path.length; i++) {\n parts.push(pathToRegexp(path[i], keys, options).source)\n }\n\n var regexp = new RegExp('(?:' + parts.join('|') + ')', flags(options))\n\n return attachKeys(regexp, keys)\n}\n\n/**\n * Create a path regexp from string input.\n *\n * @param {string} path\n * @param {!Array} keys\n * @param {!Object} options\n * @return {!RegExp}\n */\nfunction stringToRegexp (path, keys, options) {\n return tokensToRegExp(parse(path, options), keys, options)\n}\n\n/**\n * Expose a function for taking tokens and returning a RegExp.\n *\n * @param {!Array} tokens\n * @param {(Array|Object)=} keys\n * @param {Object=} options\n * @return {!RegExp}\n */\nfunction tokensToRegExp (tokens, keys, options) {\n if (!isarray(keys)) {\n options = /** @type {!Object} */ (keys || options)\n keys = []\n }\n\n options = options || {}\n\n var strict = options.strict\n var end = options.end !== false\n var route = ''\n\n // Iterate over the tokens and create our regexp string.\n for (var i = 0; i < tokens.length; i++) {\n var token = tokens[i]\n\n if (typeof token === 'string') {\n route += escapeString(token)\n } else {\n var prefix = escapeString(token.prefix)\n var capture = '(?:' + token.pattern + ')'\n\n keys.push(token)\n\n if (token.repeat) {\n capture += '(?:' + prefix + capture + ')*'\n }\n\n if (token.optional) {\n if (!token.partial) {\n capture = '(?:' + prefix + '(' + capture + '))?'\n } else {\n capture = prefix + '(' + capture + ')?'\n }\n } else {\n capture = prefix + '(' + capture + ')'\n }\n\n route += capture\n }\n }\n\n var delimiter = escapeString(options.delimiter || '/')\n var endsWithDelimiter = route.slice(-delimiter.length) === delimiter\n\n // In non-strict mode we allow a slash at the end of match. If the path to\n // match already ends with a slash, we remove it for consistency. The slash\n // is valid at the end of a path match, not in the middle. This is important\n // in non-ending mode, where \"/test/\" shouldn't match \"/test//route\".\n if (!strict) {\n route = (endsWithDelimiter ? route.slice(0, -delimiter.length) : route) + '(?:' + delimiter + '(?=$))?'\n }\n\n if (end) {\n route += '$'\n } else {\n // In non-ending mode, we need the capturing groups to match as much as\n // possible by using a positive lookahead to the end or next path segment.\n route += strict && endsWithDelimiter ? '' : '(?=' + delimiter + '|$)'\n }\n\n return attachKeys(new RegExp('^' + route, flags(options)), keys)\n}\n\n/**\n * Normalize the given path string, returning a regular expression.\n *\n * An empty array can be passed in for the keys, which will hold the\n * placeholder key descriptions. For example, using `/user/:id`, `keys` will\n * contain `[{ name: 'id', delimiter: '/', optional: false, repeat: false }]`.\n *\n * @param {(string|RegExp|Array)} path\n * @param {(Array|Object)=} keys\n * @param {Object=} options\n * @return {!RegExp}\n */\nfunction pathToRegexp (path, keys, options) {\n if (!isarray(keys)) {\n options = /** @type {!Object} */ (keys || options)\n keys = []\n }\n\n options = options || {}\n\n if (path instanceof RegExp) {\n return regexpToRegexp(path, /** @type {!Array} */ (keys))\n }\n\n if (isarray(path)) {\n return arrayToRegexp(/** @type {!Array} */ (path), /** @type {!Array} */ (keys), options)\n }\n\n return stringToRegexp(/** @type {string} */ (path), /** @type {!Array} */ (keys), options)\n}\n","/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n'use strict';\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc'); // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","function _assertThisInitialized(self) {\n if (self === void 0) {\n throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n }\n\n return self;\n}\n\nmodule.exports = _assertThisInitialized;","var setPrototypeOf = require(\"./setPrototypeOf\");\n\nfunction isNativeReflectConstruct() {\n if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n if (Reflect.construct.sham) return false;\n if (typeof Proxy === \"function\") return true;\n\n try {\n Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n return true;\n } catch (e) {\n return false;\n }\n}\n\nfunction _construct(Parent, args, Class) {\n if (isNativeReflectConstruct()) {\n module.exports = _construct = Reflect.construct;\n } else {\n module.exports = _construct = function _construct(Parent, args, Class) {\n var a = [null];\n a.push.apply(a, args);\n var Constructor = Function.bind.apply(Parent, a);\n var instance = new Constructor();\n if (Class) setPrototypeOf(instance, Class.prototype);\n return instance;\n };\n }\n\n return _construct.apply(null, arguments);\n}\n\nmodule.exports = _construct;","export default function symbolObservablePonyfill(root) {\n\tvar result;\n\tvar Symbol = root.Symbol;\n\n\tif (typeof Symbol === 'function') {\n\t\tif (Symbol.observable) {\n\t\t\tresult = Symbol.observable;\n\t\t} else {\n\t\t\tresult = Symbol('observable');\n\t\t\tSymbol.observable = result;\n\t\t}\n\t} else {\n\t\tresult = '@@observable';\n\t}\n\n\treturn result;\n};\n","function createThunkMiddleware(extraArgument) {\n return function (_ref) {\n var dispatch = _ref.dispatch,\n getState = _ref.getState;\n return function (next) {\n return function (action) {\n if (typeof action === 'function') {\n return action(dispatch, getState, extraArgument);\n }\n\n return next(action);\n };\n };\n };\n}\n\nvar thunk = createThunkMiddleware();\nthunk.withExtraArgument = createThunkMiddleware;\n\nexport default thunk;","// @flow\n'use strict';\n\nvar key = '__global_unique_id__';\n\nmodule.exports = function() {\n return global[key] = (global[key] || 0) + 1;\n};\n","const { hasOwnProperty, setPrototypeOf, isFrozen, keys: objectKeys } = Object;\n\nlet { freeze, seal } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n apply = function(fun, thisValue, args) {\n return fun.apply(thisValue, args);\n };\n}\n\nif (!freeze) {\n freeze = function(x) {\n return x;\n };\n}\n\nif (!seal) {\n seal = function(x) {\n return x;\n };\n}\n\nif (!construct) {\n construct = function(Func, args) {\n return new Func(...args);\n };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayJoin = unapply(Array.prototype.join);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\nconst regExpCreate = unconstruct(RegExp);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array) {\n if (setPrototypeOf) {\n // Make 'in' and truthy checks like Boolean(set.constructor)\n // independent of any properties defined on Object.prototype.\n // Prevent prototype setters from intercepting set as a this value.\n setPrototypeOf(set, null);\n }\n\n let l = array.length;\n while (l--) {\n let element = array[l];\n if (typeof element === 'string') {\n const lcElement = stringToLowerCase(element);\n if (lcElement !== element) {\n // Config presets (e.g. tags.js, attrs.js) are immutable.\n if (!isFrozen(array)) {\n array[l] = lcElement;\n }\n\n element = lcElement;\n }\n }\n\n set[element] = true;\n }\n\n return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n const newObject = {};\n\n let property;\n for (property in object) {\n if (apply(hasOwnProperty, object, [property])) {\n newObject[property] = object[property];\n }\n }\n\n return newObject;\n}\n\nexport {\n // Array\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n // Object\n freeze,\n hasOwnProperty,\n isFrozen,\n objectKeys,\n setPrototypeOf,\n seal,\n // RegExp\n regExpCreate,\n regExpTest,\n // String\n stringIndexOf,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringTrim,\n // Errors\n typeErrorCreate,\n};\n","import { freeze } from './utils';\n\nexport const html = freeze([\n 'a',\n 'abbr',\n 'acronym',\n 'address',\n 'area',\n 'article',\n 'aside',\n 'audio',\n 'b',\n 'bdi',\n 'bdo',\n 'big',\n 'blink',\n 'blockquote',\n 'body',\n 'br',\n 'button',\n 'canvas',\n 'caption',\n 'center',\n 'cite',\n 'code',\n 'col',\n 'colgroup',\n 'content',\n 'data',\n 'datalist',\n 'dd',\n 'decorator',\n 'del',\n 'details',\n 'dfn',\n 'dir',\n 'div',\n 'dl',\n 'dt',\n 'element',\n 'em',\n 'fieldset',\n 'figcaption',\n 'figure',\n 'font',\n 'footer',\n 'form',\n 'h1',\n 'h2',\n 'h3',\n 'h4',\n 'h5',\n 'h6',\n 'head',\n 'header',\n 'hgroup',\n 'hr',\n 'html',\n 'i',\n 'img',\n 'input',\n 'ins',\n 'kbd',\n 'label',\n 'legend',\n 'li',\n 'main',\n 'map',\n 'mark',\n 'marquee',\n 'menu',\n 'menuitem',\n 'meter',\n 'nav',\n 'nobr',\n 'ol',\n 'optgroup',\n 'option',\n 'output',\n 'p',\n 'picture',\n 'pre',\n 'progress',\n 'q',\n 'rp',\n 'rt',\n 'ruby',\n 's',\n 'samp',\n 'section',\n 'select',\n 'shadow',\n 'small',\n 'source',\n 'spacer',\n 'span',\n 'strike',\n 'strong',\n 'style',\n 'sub',\n 'summary',\n 'sup',\n 'table',\n 'tbody',\n 'td',\n 'template',\n 'textarea',\n 'tfoot',\n 'th',\n 'thead',\n 'time',\n 'tr',\n 'track',\n 'tt',\n 'u',\n 'ul',\n 'var',\n 'video',\n 'wbr',\n]);\n\n// SVG\nexport const svg = freeze([\n 'svg',\n 'a',\n 'altglyph',\n 'altglyphdef',\n 'altglyphitem',\n 'animatecolor',\n 'animatemotion',\n 'animatetransform',\n 'audio',\n 'canvas',\n 'circle',\n 'clippath',\n 'defs',\n 'desc',\n 'ellipse',\n 'filter',\n 'font',\n 'g',\n 'glyph',\n 'glyphref',\n 'hkern',\n 'image',\n 'line',\n 'lineargradient',\n 'marker',\n 'mask',\n 'metadata',\n 'mpath',\n 'path',\n 'pattern',\n 'polygon',\n 'polyline',\n 'radialgradient',\n 'rect',\n 'stop',\n 'style',\n 'switch',\n 'symbol',\n 'text',\n 'textpath',\n 'title',\n 'tref',\n 'tspan',\n 'video',\n 'view',\n 'vkern',\n]);\n\nexport const svgFilters = freeze([\n 'feBlend',\n 'feColorMatrix',\n 'feComponentTransfer',\n 'feComposite',\n 'feConvolveMatrix',\n 'feDiffuseLighting',\n 'feDisplacementMap',\n 'feDistantLight',\n 'feFlood',\n 'feFuncA',\n 'feFuncB',\n 'feFuncG',\n 'feFuncR',\n 'feGaussianBlur',\n 'feMerge',\n 'feMergeNode',\n 'feMorphology',\n 'feOffset',\n 'fePointLight',\n 'feSpecularLighting',\n 'feSpotLight',\n 'feTile',\n 'feTurbulence',\n]);\n\nexport const mathMl = freeze([\n 'math',\n 'menclose',\n 'merror',\n 'mfenced',\n 'mfrac',\n 'mglyph',\n 'mi',\n 'mlabeledtr',\n 'mmultiscripts',\n 'mn',\n 'mo',\n 'mover',\n 'mpadded',\n 'mphantom',\n 'mroot',\n 'mrow',\n 'ms',\n 'mspace',\n 'msqrt',\n 'mstyle',\n 'msub',\n 'msup',\n 'msubsup',\n 'mtable',\n 'mtd',\n 'mtext',\n 'mtr',\n 'munder',\n 'munderover',\n]);\n\nexport const text = freeze(['#text']);\n","import { freeze } from './utils';\n\nexport const html = freeze([\n 'accept',\n 'action',\n 'align',\n 'alt',\n 'autocomplete',\n 'background',\n 'bgcolor',\n 'border',\n 'cellpadding',\n 'cellspacing',\n 'checked',\n 'cite',\n 'class',\n 'clear',\n 'color',\n 'cols',\n 'colspan',\n 'controls',\n 'coords',\n 'crossorigin',\n 'datetime',\n 'default',\n 'dir',\n 'disabled',\n 'download',\n 'enctype',\n 'face',\n 'for',\n 'headers',\n 'height',\n 'hidden',\n 'high',\n 'href',\n 'hreflang',\n 'id',\n 'integrity',\n 'ismap',\n 'label',\n 'lang',\n 'list',\n 'loop',\n 'low',\n 'max',\n 'maxlength',\n 'media',\n 'method',\n 'min',\n 'minlength',\n 'multiple',\n 'name',\n 'noshade',\n 'novalidate',\n 'nowrap',\n 'open',\n 'optimum',\n 'pattern',\n 'placeholder',\n 'poster',\n 'preload',\n 'pubdate',\n 'radiogroup',\n 'readonly',\n 'rel',\n 'required',\n 'rev',\n 'reversed',\n 'role',\n 'rows',\n 'rowspan',\n 'spellcheck',\n 'scope',\n 'selected',\n 'shape',\n 'size',\n 'sizes',\n 'span',\n 'srclang',\n 'start',\n 'src',\n 'srcset',\n 'step',\n 'style',\n 'summary',\n 'tabindex',\n 'title',\n 'type',\n 'usemap',\n 'valign',\n 'value',\n 'width',\n 'xmlns',\n]);\n\nexport const svg = freeze([\n 'accent-height',\n 'accumulate',\n 'additive',\n 'alignment-baseline',\n 'ascent',\n 'attributename',\n 'attributetype',\n 'azimuth',\n 'basefrequency',\n 'baseline-shift',\n 'begin',\n 'bias',\n 'by',\n 'class',\n 'clip',\n 'clip-path',\n 'clip-rule',\n 'color',\n 'color-interpolation',\n 'color-interpolation-filters',\n 'color-profile',\n 'color-rendering',\n 'cx',\n 'cy',\n 'd',\n 'dx',\n 'dy',\n 'diffuseconstant',\n 'direction',\n 'display',\n 'divisor',\n 'dur',\n 'edgemode',\n 'elevation',\n 'end',\n 'fill',\n 'fill-opacity',\n 'fill-rule',\n 'filter',\n 'filterunits',\n 'flood-color',\n 'flood-opacity',\n 'font-family',\n 'font-size',\n 'font-size-adjust',\n 'font-stretch',\n 'font-style',\n 'font-variant',\n 'font-weight',\n 'fx',\n 'fy',\n 'g1',\n 'g2',\n 'glyph-name',\n 'glyphref',\n 'gradientunits',\n 'gradienttransform',\n 'height',\n 'href',\n 'id',\n 'image-rendering',\n 'in',\n 'in2',\n 'k',\n 'k1',\n 'k2',\n 'k3',\n 'k4',\n 'kerning',\n 'keypoints',\n 'keysplines',\n 'keytimes',\n 'lang',\n 'lengthadjust',\n 'letter-spacing',\n 'kernelmatrix',\n 'kernelunitlength',\n 'lighting-color',\n 'local',\n 'marker-end',\n 'marker-mid',\n 'marker-start',\n 'markerheight',\n 'markerunits',\n 'markerwidth',\n 'maskcontentunits',\n 'maskunits',\n 'max',\n 'mask',\n 'media',\n 'method',\n 'mode',\n 'min',\n 'name',\n 'numoctaves',\n 'offset',\n 'operator',\n 'opacity',\n 'order',\n 'orient',\n 'orientation',\n 'origin',\n 'overflow',\n 'paint-order',\n 'path',\n 'pathlength',\n 'patterncontentunits',\n 'patterntransform',\n 'patternunits',\n 'points',\n 'preservealpha',\n 'preserveaspectratio',\n 'primitiveunits',\n 'r',\n 'rx',\n 'ry',\n 'radius',\n 'refx',\n 'refy',\n 'repeatcount',\n 'repeatdur',\n 'restart',\n 'result',\n 'rotate',\n 'scale',\n 'seed',\n 'shape-rendering',\n 'specularconstant',\n 'specularexponent',\n 'spreadmethod',\n 'stddeviation',\n 'stitchtiles',\n 'stop-color',\n 'stop-opacity',\n 'stroke-dasharray',\n 'stroke-dashoffset',\n 'stroke-linecap',\n 'stroke-linejoin',\n 'stroke-miterlimit',\n 'stroke-opacity',\n 'stroke',\n 'stroke-width',\n 'style',\n 'surfacescale',\n 'tabindex',\n 'targetx',\n 'targety',\n 'transform',\n 'text-anchor',\n 'text-decoration',\n 'text-rendering',\n 'textlength',\n 'type',\n 'u1',\n 'u2',\n 'unicode',\n 'values',\n 'viewbox',\n 'visibility',\n 'version',\n 'vert-adv-y',\n 'vert-origin-x',\n 'vert-origin-y',\n 'width',\n 'word-spacing',\n 'wrap',\n 'writing-mode',\n 'xchannelselector',\n 'ychannelselector',\n 'x',\n 'x1',\n 'x2',\n 'xmlns',\n 'y',\n 'y1',\n 'y2',\n 'z',\n 'zoomandpan',\n]);\n\nexport const mathMl = freeze([\n 'accent',\n 'accentunder',\n 'align',\n 'bevelled',\n 'close',\n 'columnsalign',\n 'columnlines',\n 'columnspan',\n 'denomalign',\n 'depth',\n 'dir',\n 'display',\n 'displaystyle',\n 'encoding',\n 'fence',\n 'frame',\n 'height',\n 'href',\n 'id',\n 'largeop',\n 'length',\n 'linethickness',\n 'lspace',\n 'lquote',\n 'mathbackground',\n 'mathcolor',\n 'mathsize',\n 'mathvariant',\n 'maxsize',\n 'minsize',\n 'movablelimits',\n 'notation',\n 'numalign',\n 'open',\n 'rowalign',\n 'rowlines',\n 'rowspacing',\n 'rowspan',\n 'rspace',\n 'rquote',\n 'scriptlevel',\n 'scriptminsize',\n 'scriptsizemultiplier',\n 'selection',\n 'separator',\n 'separators',\n 'stretchy',\n 'subscriptshift',\n 'supscriptshift',\n 'symmetric',\n 'voffset',\n 'width',\n 'xmlns',\n]);\n\nexport const xml = freeze([\n 'xlink:href',\n 'xml:id',\n 'xlink:title',\n 'xml:space',\n 'xmlns:xlink',\n]);\n","import { seal } from './utils';\n\nexport const MUSTACHE_EXPR = seal(/\\{\\{[\\s\\S]*|[\\s\\S]*\\}\\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode\nexport const ERB_EXPR = seal(/<%[\\s\\S]*|[\\s\\S]*%>/gm);\nexport const DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]/); // eslint-disable-line no-useless-escape\nexport const ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nexport const IS_ALLOWED_URI = seal(\n /^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nexport const IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nexport const ATTR_WHITESPACE = seal(\n /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205f\\u3000]/g // eslint-disable-line no-control-regex\n);\n","import * as TAGS from './tags';\nimport * as ATTRS from './attrs';\nimport * as EXPRESSIONS from './regexp';\nimport {\n addToSet,\n clone,\n freeze,\n objectKeys,\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringIndexOf,\n stringTrim,\n regExpTest,\n regExpCreate,\n typeErrorCreate,\n} from './utils';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function(trustedTypes, document) {\n if (\n typeof trustedTypes !== 'object' ||\n typeof trustedTypes.createPolicy !== 'function'\n ) {\n return null;\n }\n\n // Allow the callers to control the unique policy name\n // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n // Policy creation with duplicate names throws in Trusted Types.\n let suffix = null;\n const ATTR_NAME = 'data-tt-policy-suffix';\n if (\n document.currentScript &&\n document.currentScript.hasAttribute(ATTR_NAME)\n ) {\n suffix = document.currentScript.getAttribute(ATTR_NAME);\n }\n\n const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n try {\n return trustedTypes.createPolicy(policyName, {\n createHTML(html) {\n return html;\n },\n });\n } catch (error) {\n // Policy creation failed (most likely another DOMPurify script has\n // already run). Skip creating the policy, as this will only cause errors\n // if TT are enforced.\n console.warn(\n 'TrustedTypes policy ' + policyName + ' could not be created.'\n );\n return null;\n }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n const DOMPurify = root => createDOMPurify(root);\n\n /**\n * Version label, exposed for easier checks\n * if DOMPurify is up to date or not\n */\n DOMPurify.version = VERSION;\n\n /**\n * Array of elements that DOMPurify removed during sanitation.\n * Empty if nothing was removed.\n */\n DOMPurify.removed = [];\n\n if (!window || !window.document || window.document.nodeType !== 9) {\n // Not running in a browser, provide a factory function\n // so that you can pass your own Window\n DOMPurify.isSupported = false;\n\n return DOMPurify;\n }\n\n const originalDocument = window.document;\n let useDOMParser = false;\n let removeTitle = false;\n\n let { document } = window;\n const {\n DocumentFragment,\n HTMLTemplateElement,\n Node,\n NodeFilter,\n NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n Text,\n Comment,\n DOMParser,\n trustedTypes,\n } = window;\n\n // As per issue #47, the web-components registry is inherited by a\n // new document created via createHTMLDocument. As per the spec\n // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n // a new empty registry is used when creating a template contents owner\n // document, so we use that as our parent document to ensure nothing\n // is inherited.\n if (typeof HTMLTemplateElement === 'function') {\n const template = document.createElement('template');\n if (template.content && template.content.ownerDocument) {\n document = template.content.ownerDocument;\n }\n }\n\n const trustedTypesPolicy = _createTrustedTypesPolicy(\n trustedTypes,\n originalDocument\n );\n const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n const {\n implementation,\n createNodeIterator,\n getElementsByTagName,\n createDocumentFragment,\n } = document;\n const { importNode } = originalDocument;\n\n let hooks = {};\n\n /**\n * Expose whether this browser supports running the full DOMPurify.\n */\n DOMPurify.isSupported =\n implementation &&\n typeof implementation.createHTMLDocument !== 'undefined' &&\n document.documentMode !== 9;\n\n const {\n MUSTACHE_EXPR,\n ERB_EXPR,\n DATA_ATTR,\n ARIA_ATTR,\n IS_SCRIPT_OR_DATA,\n ATTR_WHITESPACE,\n } = EXPRESSIONS;\n\n let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n /**\n * We consider the elements and attributes below to be safe. Ideally\n * don't add any new ones but feel free to remove unwanted ones.\n */\n\n /* allowed element names */\n let ALLOWED_TAGS = null;\n const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n ...TAGS.html,\n ...TAGS.svg,\n ...TAGS.svgFilters,\n ...TAGS.mathMl,\n ...TAGS.text,\n ]);\n\n /* Allowed attribute names */\n let ALLOWED_ATTR = null;\n const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n ...ATTRS.html,\n ...ATTRS.svg,\n ...ATTRS.mathMl,\n ...ATTRS.xml,\n ]);\n\n /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n let FORBID_TAGS = null;\n\n /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n let FORBID_ATTR = null;\n\n /* Decide if ARIA attributes are okay */\n let ALLOW_ARIA_ATTR = true;\n\n /* Decide if custom data attributes are okay */\n let ALLOW_DATA_ATTR = true;\n\n /* Decide if unknown protocols are okay */\n let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n /* Output should be safe for jQuery's $() factory? */\n let SAFE_FOR_JQUERY = false;\n\n /* Output should be safe for common template engines.\n * This means, DOMPurify removes data attributes, mustaches and ERB\n */\n let SAFE_FOR_TEMPLATES = false;\n\n /* Decide if document with <html>... should be returned */\n let WHOLE_DOCUMENT = false;\n\n /* Track whether config is already set on this instance of DOMPurify. */\n let SET_CONFIG = false;\n\n /* Decide if all elements (e.g. style, script) must be children of\n * document.body. By default, browsers might move them to document.head */\n let FORCE_BODY = false;\n\n /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported).\n * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n */\n let RETURN_DOM = false;\n\n /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported) */\n let RETURN_DOM_FRAGMENT = false;\n\n /* If `RETURN_DOM` or `RETURN_DOM_FRAGMENT` is enabled, decide if the returned DOM\n * `Node` is imported into the current `Document`. If this flag is not enabled the\n * `Node` will belong (its ownerDocument) to a fresh `HTMLDocument`, created by\n * DOMPurify. */\n let RETURN_DOM_IMPORT = false;\n\n /* Try to return a Trusted Type object instead of a string, retrun a string in\n * case Trusted Types are not supported */\n let RETURN_TRUSTED_TYPE = false;\n\n /* Output should be free from DOM clobbering attacks? */\n let SANITIZE_DOM = true;\n\n /* Keep element content when removing element? */\n let KEEP_CONTENT = true;\n\n /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n * of importing it into a new Document and returning a sanitized copy */\n let IN_PLACE = false;\n\n /* Allow usage of profiles like html, svg and mathMl */\n let USE_PROFILES = {};\n\n /* Tags to ignore content of when KEEP_CONTENT is true */\n const FORBID_CONTENTS = addToSet({}, [\n 'annotation-xml',\n 'audio',\n 'colgroup',\n 'desc',\n 'foreignobject',\n 'head',\n 'iframe',\n 'math',\n 'mi',\n 'mn',\n 'mo',\n 'ms',\n 'mtext',\n 'noembed',\n 'noframes',\n 'plaintext',\n 'script',\n 'style',\n 'svg',\n 'template',\n 'thead',\n 'title',\n 'video',\n 'xmp',\n ]);\n\n /* Tags that are safe for data: URIs */\n const DATA_URI_TAGS = addToSet({}, [\n 'audio',\n 'video',\n 'img',\n 'source',\n 'image',\n ]);\n\n /* Attributes safe for values like \"javascript:\" */\n let URI_SAFE_ATTRIBUTES = null;\n const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n 'alt',\n 'class',\n 'for',\n 'id',\n 'label',\n 'name',\n 'pattern',\n 'placeholder',\n 'summary',\n 'title',\n 'value',\n 'style',\n 'xmlns',\n ]);\n\n /* Keep a reference to config to pass to hooks */\n let CONFIG = null;\n\n /* Ideally, do not touch anything below this line */\n /* ______________________________________________ */\n\n const formElement = document.createElement('form');\n\n /**\n * _parseConfig\n *\n * @param {Object} cfg optional config literal\n */\n // eslint-disable-next-line complexity\n const _parseConfig = function(cfg) {\n if (CONFIG && CONFIG === cfg) {\n return;\n }\n\n /* Shield configuration object from tampering */\n if (!cfg || typeof cfg !== 'object') {\n cfg = {};\n }\n\n /* Set configuration parameters */\n ALLOWED_TAGS =\n 'ALLOWED_TAGS' in cfg\n ? addToSet({}, cfg.ALLOWED_TAGS)\n : DEFAULT_ALLOWED_TAGS;\n ALLOWED_ATTR =\n 'ALLOWED_ATTR' in cfg\n ? addToSet({}, cfg.ALLOWED_ATTR)\n : DEFAULT_ALLOWED_ATTR;\n URI_SAFE_ATTRIBUTES =\n 'ADD_URI_SAFE_ATTR' in cfg\n ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR)\n : DEFAULT_URI_SAFE_ATTRIBUTES;\n FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS) : {};\n FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR) : {};\n USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n SAFE_FOR_JQUERY = cfg.SAFE_FOR_JQUERY || false; // Default false\n SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n RETURN_DOM_IMPORT = cfg.RETURN_DOM_IMPORT || false; // Default false\n RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n IN_PLACE = cfg.IN_PLACE || false; // Default false\n IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;\n if (SAFE_FOR_TEMPLATES) {\n ALLOW_DATA_ATTR = false;\n }\n\n if (RETURN_DOM_FRAGMENT) {\n RETURN_DOM = true;\n }\n\n /* Parse profile info */\n if (USE_PROFILES) {\n ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n ALLOWED_ATTR = [];\n if (USE_PROFILES.html === true) {\n addToSet(ALLOWED_TAGS, TAGS.html);\n addToSet(ALLOWED_ATTR, ATTRS.html);\n }\n\n if (USE_PROFILES.svg === true) {\n addToSet(ALLOWED_TAGS, TAGS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.svgFilters === true) {\n addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.mathMl === true) {\n addToSet(ALLOWED_TAGS, TAGS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n }\n\n /* Merge configuration parameters */\n if (cfg.ADD_TAGS) {\n if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n ALLOWED_TAGS = clone(ALLOWED_TAGS);\n }\n\n addToSet(ALLOWED_TAGS, cfg.ADD_TAGS);\n }\n\n if (cfg.ADD_ATTR) {\n if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n ALLOWED_ATTR = clone(ALLOWED_ATTR);\n }\n\n addToSet(ALLOWED_ATTR, cfg.ADD_ATTR);\n }\n\n if (cfg.ADD_URI_SAFE_ATTR) {\n addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR);\n }\n\n /* Add #text in case KEEP_CONTENT is set to true */\n if (KEEP_CONTENT) {\n ALLOWED_TAGS['#text'] = true;\n }\n\n /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n if (WHOLE_DOCUMENT) {\n addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n }\n\n /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n if (ALLOWED_TAGS.table) {\n addToSet(ALLOWED_TAGS, ['tbody']);\n delete FORBID_TAGS.tbody;\n }\n\n // Prevent further manipulation of configuration.\n // Not available in IE8, Safari 5, etc.\n if (freeze) {\n freeze(cfg);\n }\n\n CONFIG = cfg;\n };\n\n /**\n * _forceRemove\n *\n * @param {Node} node a DOM node\n */\n const _forceRemove = function(node) {\n arrayPush(DOMPurify.removed, { element: node });\n try {\n node.parentNode.removeChild(node);\n } catch (error) {\n node.outerHTML = emptyHTML;\n }\n };\n\n /**\n * _removeAttribute\n *\n * @param {String} name an Attribute name\n * @param {Node} node a DOM node\n */\n const _removeAttribute = function(name, node) {\n try {\n arrayPush(DOMPurify.removed, {\n attribute: node.getAttributeNode(name),\n from: node,\n });\n } catch (error) {\n arrayPush(DOMPurify.removed, {\n attribute: null,\n from: node,\n });\n }\n\n node.removeAttribute(name);\n };\n\n /**\n * _initDocument\n *\n * @param {String} dirty a string of dirty markup\n * @return {Document} a DOM, filled with the dirty markup\n */\n const _initDocument = function(dirty) {\n /* Create a HTML document */\n let doc;\n let leadingWhitespace;\n\n if (FORCE_BODY) {\n dirty = '<remove></remove>' + dirty;\n } else {\n /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n const matches = stringMatch(dirty, /^[\\s]+/);\n leadingWhitespace = matches && matches[0];\n }\n\n const dirtyPayload = trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(dirty)\n : dirty;\n /* Use DOMParser to workaround Firefox bug (see comment below) */\n if (useDOMParser) {\n try {\n doc = new DOMParser().parseFromString(dirtyPayload, 'text/html');\n } catch (error) {}\n }\n\n /* Remove title to fix a mXSS bug in older MS Edge */\n if (removeTitle) {\n addToSet(FORBID_TAGS, ['title']);\n }\n\n /* Otherwise use createHTMLDocument, because DOMParser is unsafe in\n Safari (see comment below) */\n if (!doc || !doc.documentElement) {\n doc = implementation.createHTMLDocument('');\n const { body } = doc;\n body.parentNode.removeChild(body.parentNode.firstElementChild);\n body.outerHTML = dirtyPayload;\n }\n\n if (dirty && leadingWhitespace) {\n doc.body.insertBefore(\n document.createTextNode(leadingWhitespace),\n doc.body.childNodes[0] || null\n );\n }\n\n /* Work on whole document or just its body */\n return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];\n };\n\n // Firefox uses a different parser for innerHTML rather than\n // DOMParser (see https://bugzilla.mozilla.org/show_bug.cgi?id=1205631)\n // which means that you *must* use DOMParser, otherwise the output may\n // not be safe if used in a document.write context later.\n //\n // So we feature detect the Firefox bug and use the DOMParser if necessary.\n //\n // Chrome 77 and other versions ship an mXSS bug that caused a bypass to\n // happen. We now check for the mXSS trigger and react accordingly.\n if (DOMPurify.isSupported) {\n (function() {\n try {\n const doc = _initDocument(\n '<svg><p><textarea><img src=\"</textarea><img src=x abc=1//\">'\n );\n if (doc.querySelector('svg img')) {\n useDOMParser = true;\n }\n } catch (error) {}\n })();\n\n (function() {\n try {\n const doc = _initDocument('<x/><title></title><img>');\n if (regExpTest(/<\\/title/, doc.querySelector('title').innerHTML)) {\n removeTitle = true;\n }\n } catch (error) {}\n })();\n }\n\n /**\n * _createIterator\n *\n * @param {Document} root document/fragment to create iterator for\n * @return {Iterator} iterator instance\n */\n const _createIterator = function(root) {\n return createNodeIterator.call(\n root.ownerDocument || root,\n root,\n NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT,\n () => {\n return NodeFilter.FILTER_ACCEPT;\n },\n false\n );\n };\n\n /**\n * _isClobbered\n *\n * @param {Node} elm element to check for clobbering attacks\n * @return {Boolean} true if clobbered, false if safe\n */\n const _isClobbered = function(elm) {\n if (elm instanceof Text || elm instanceof Comment) {\n return false;\n }\n\n if (\n typeof elm.nodeName !== 'string' ||\n typeof elm.textContent !== 'string' ||\n typeof elm.removeChild !== 'function' ||\n !(elm.attributes instanceof NamedNodeMap) ||\n typeof elm.removeAttribute !== 'function' ||\n typeof elm.setAttribute !== 'function' ||\n typeof elm.namespaceURI !== 'string'\n ) {\n return true;\n }\n\n return false;\n };\n\n /**\n * _isNode\n *\n * @param {Node} obj object to check whether it's a DOM node\n * @return {Boolean} true is object is a DOM node\n */\n const _isNode = function(obj) {\n return typeof Node === 'object'\n ? obj instanceof Node\n : obj &&\n typeof obj === 'object' &&\n typeof obj.nodeType === 'number' &&\n typeof obj.nodeName === 'string';\n };\n\n /**\n * _executeHook\n * Execute user configurable hooks\n *\n * @param {String} entryPoint Name of the hook's entry point\n * @param {Node} currentNode node to work on with the hook\n * @param {Object} data additional hook parameters\n */\n const _executeHook = function(entryPoint, currentNode, data) {\n if (!hooks[entryPoint]) {\n return;\n }\n\n arrayForEach(hooks[entryPoint], hook => {\n hook.call(DOMPurify, currentNode, data, CONFIG);\n });\n };\n\n /**\n * _sanitizeElements\n *\n * @protect nodeName\n * @protect textContent\n * @protect removeChild\n *\n * @param {Node} currentNode to check for permission to exist\n * @return {Boolean} true if node was killed, false if left alive\n */\n // eslint-disable-next-line complexity\n const _sanitizeElements = function(currentNode) {\n let content;\n\n /* Execute a hook if present */\n _executeHook('beforeSanitizeElements', currentNode, null);\n\n /* Check if element is clobbered or can clobber */\n if (_isClobbered(currentNode)) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Now let's check the element's type and name */\n const tagName = stringToLowerCase(currentNode.nodeName);\n\n /* Execute a hook if present */\n _executeHook('uponSanitizeElement', currentNode, {\n tagName,\n allowedTags: ALLOWED_TAGS,\n });\n\n /* Take care of an mXSS pattern using p, br inside svg, math */\n if (\n (tagName === 'svg' || tagName === 'math') &&\n currentNode.querySelectorAll('p, br').length !== 0\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Remove element if anything forbids its presence */\n if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n /* Keep content except for black-listed elements */\n if (\n KEEP_CONTENT &&\n !FORBID_CONTENTS[tagName] &&\n typeof currentNode.insertAdjacentHTML === 'function'\n ) {\n try {\n const htmlToInsert = currentNode.innerHTML;\n currentNode.insertAdjacentHTML(\n 'AfterEnd',\n trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(htmlToInsert)\n : htmlToInsert\n );\n } catch (error) {}\n }\n\n _forceRemove(currentNode);\n return true;\n }\n\n /* Remove in case a noscript/noembed XSS is suspected */\n if (\n tagName === 'noscript' &&\n regExpTest(/<\\/noscript/i, currentNode.innerHTML)\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n if (\n tagName === 'noembed' &&\n regExpTest(/<\\/noembed/i, currentNode.innerHTML)\n ) {\n _forceRemove(currentNode);\n return true;\n }\n\n /* Convert markup to cover jQuery behavior */\n if (\n SAFE_FOR_JQUERY &&\n !currentNode.firstElementChild &&\n (!currentNode.content || !currentNode.content.firstElementChild) &&\n regExpTest(/</g, currentNode.textContent)\n ) {\n arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n if (currentNode.innerHTML) {\n currentNode.innerHTML = stringReplace(\n currentNode.innerHTML,\n /</g,\n '<'\n );\n } else {\n currentNode.innerHTML = stringReplace(\n currentNode.textContent,\n /</g,\n '<'\n );\n }\n }\n\n /* Sanitize element content to be template-safe */\n if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {\n /* Get the element's text content */\n content = currentNode.textContent;\n content = stringReplace(content, MUSTACHE_EXPR, ' ');\n content = stringReplace(content, ERB_EXPR, ' ');\n if (currentNode.textContent !== content) {\n arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });\n currentNode.textContent = content;\n }\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeElements', currentNode, null);\n\n return false;\n };\n\n /**\n * _isValidAttribute\n *\n * @param {string} lcTag Lowercase tag name of containing element.\n * @param {string} lcName Lowercase attribute name.\n * @param {string} value Attribute value.\n * @return {Boolean} Returns true if `value` is valid, otherwise false.\n */\n // eslint-disable-next-line complexity\n const _isValidAttribute = function(lcTag, lcName, value) {\n /* Make sure attribute cannot clobber */\n if (\n SANITIZE_DOM &&\n (lcName === 'id' || lcName === 'name') &&\n (value in document || value in formElement)\n ) {\n return false;\n }\n\n /* Allow valid data-* attributes: At least one character after \"-\"\n (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n We don't need to check the value; it's always URI safe. */\n if (ALLOW_DATA_ATTR && regExpTest(DATA_ATTR, lcName)) {\n // This attribute is safe\n } else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) {\n // This attribute is safe\n /* Otherwise, check the name is permitted */\n } else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {\n return false;\n\n /* Check value is safe. First, is attr inert? If so, is safe */\n } else if (URI_SAFE_ATTRIBUTES[lcName]) {\n // This attribute is safe\n /* Check no script, data or unknown possibly unsafe URI\n unless we know URI values are safe for that attribute */\n } else if (\n regExpTest(IS_ALLOWED_URI, stringReplace(value, ATTR_WHITESPACE, ''))\n ) {\n // This attribute is safe\n /* Keep image data URIs alive if src/xlink:href is allowed */\n /* Further prevent gadget XSS for dynamically built script tags */\n } else if (\n (lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') &&\n lcTag !== 'script' &&\n stringIndexOf(value, 'data:') === 0 &&\n DATA_URI_TAGS[lcTag]\n ) {\n // This attribute is safe\n /* Allow unknown protocols: This provides support for links that\n are handled by protocol handlers which may be unknown ahead of\n time, e.g. fb:, spotify: */\n } else if (\n ALLOW_UNKNOWN_PROTOCOLS &&\n !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))\n ) {\n // This attribute is safe\n /* Check for binary attributes */\n // eslint-disable-next-line no-negated-condition\n } else if (!value) {\n // Binary attributes are safe at this point\n /* Anything else, presume unsafe, do not add it back */\n } else {\n return false;\n }\n\n return true;\n };\n\n /**\n * _sanitizeAttributes\n *\n * @protect attributes\n * @protect nodeName\n * @protect removeAttribute\n * @protect setAttribute\n *\n * @param {Node} currentNode to sanitize\n */\n // eslint-disable-next-line complexity\n const _sanitizeAttributes = function(currentNode) {\n let attr;\n let value;\n let lcName;\n let idAttr;\n let l;\n /* Execute a hook if present */\n _executeHook('beforeSanitizeAttributes', currentNode, null);\n\n let { attributes } = currentNode;\n\n /* Check if we have attributes; if not we might have a text node */\n if (!attributes) {\n return;\n }\n\n const hookEvent = {\n attrName: '',\n attrValue: '',\n keepAttr: true,\n allowedAttributes: ALLOWED_ATTR,\n };\n l = attributes.length;\n\n /* Go backwards over all attributes; safely remove bad ones */\n while (l--) {\n attr = attributes[l];\n const { name, namespaceURI } = attr;\n value = stringTrim(attr.value);\n lcName = stringToLowerCase(name);\n\n /* Execute a hook if present */\n hookEvent.attrName = lcName;\n hookEvent.attrValue = value;\n hookEvent.keepAttr = true;\n hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n _executeHook('uponSanitizeAttribute', currentNode, hookEvent);\n value = hookEvent.attrValue;\n /* Did the hooks approve of the attribute? */\n if (hookEvent.forceKeepAttr) {\n continue;\n }\n\n /* Remove attribute */\n // Safari (iOS + Mac), last tested v8.0.5, crashes if you try to\n // remove a \"name\" attribute from an <img> tag that has an \"id\"\n // attribute at the time.\n if (\n lcName === 'name' &&\n currentNode.nodeName === 'IMG' &&\n attributes.id\n ) {\n idAttr = attributes.id;\n attributes = arraySlice(attributes, []);\n _removeAttribute('id', currentNode);\n _removeAttribute(name, currentNode);\n if (arrayIndexOf(attributes, idAttr) > l) {\n currentNode.setAttribute('id', idAttr.value);\n }\n } else if (\n // This works around a bug in Safari, where input[type=file]\n // cannot be dynamically set after type has been removed\n currentNode.nodeName === 'INPUT' &&\n lcName === 'type' &&\n value === 'file' &&\n hookEvent.keepAttr &&\n (ALLOWED_ATTR[lcName] || !FORBID_ATTR[lcName])\n ) {\n continue;\n } else {\n // This avoids a crash in Safari v9.0 with double-ids.\n // The trick is to first set the id to be empty and then to\n // remove the attribute\n if (name === 'id') {\n currentNode.setAttribute(name, '');\n }\n\n _removeAttribute(name, currentNode);\n }\n\n /* Did the hooks approve of the attribute? */\n if (!hookEvent.keepAttr) {\n continue;\n }\n\n /* Work around a security issue in jQuery 3.0 */\n if (SAFE_FOR_JQUERY && regExpTest(/\\/>/i, value)) {\n _removeAttribute(name, currentNode);\n continue;\n }\n\n /* Take care of an mXSS pattern using namespace switches */\n if (\n regExpTest(/svg|math/i, currentNode.namespaceURI) &&\n regExpTest(\n regExpCreate(\n '</(' + arrayJoin(objectKeys(FORBID_CONTENTS), '|') + ')',\n 'i'\n ),\n value\n )\n ) {\n _removeAttribute(name, currentNode);\n continue;\n }\n\n /* Sanitize attribute content to be template-safe */\n if (SAFE_FOR_TEMPLATES) {\n value = stringReplace(value, MUSTACHE_EXPR, ' ');\n value = stringReplace(value, ERB_EXPR, ' ');\n }\n\n /* Is `value` valid for this attribute? */\n const lcTag = currentNode.nodeName.toLowerCase();\n if (!_isValidAttribute(lcTag, lcName, value)) {\n continue;\n }\n\n /* Handle invalid data-* attribute set by try-catching it */\n try {\n if (namespaceURI) {\n currentNode.setAttributeNS(namespaceURI, name, value);\n } else {\n /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n currentNode.setAttribute(name, value);\n }\n\n arrayPop(DOMPurify.removed);\n } catch (error) {}\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeAttributes', currentNode, null);\n };\n\n /**\n * _sanitizeShadowDOM\n *\n * @param {DocumentFragment} fragment to iterate over recursively\n */\n const _sanitizeShadowDOM = function(fragment) {\n let shadowNode;\n const shadowIterator = _createIterator(fragment);\n\n /* Execute a hook if present */\n _executeHook('beforeSanitizeShadowDOM', fragment, null);\n\n while ((shadowNode = shadowIterator.nextNode())) {\n /* Execute a hook if present */\n _executeHook('uponSanitizeShadowNode', shadowNode, null);\n\n /* Sanitize tags and elements */\n if (_sanitizeElements(shadowNode)) {\n continue;\n }\n\n /* Deep shadow DOM detected */\n if (shadowNode.content instanceof DocumentFragment) {\n _sanitizeShadowDOM(shadowNode.content);\n }\n\n /* Check attributes, sanitize if necessary */\n _sanitizeAttributes(shadowNode);\n }\n\n /* Execute a hook if present */\n _executeHook('afterSanitizeShadowDOM', fragment, null);\n };\n\n /**\n * Sanitize\n * Public method providing core sanitation functionality\n *\n * @param {String|Node} dirty string or DOM node\n * @param {Object} configuration object\n */\n // eslint-disable-next-line complexity\n DOMPurify.sanitize = function(dirty, cfg) {\n let body;\n let importedNode;\n let currentNode;\n let oldNode;\n let returnNode;\n /* Make sure we have a string to sanitize.\n DO NOT return early, as this will return the wrong type if\n the user has requested a DOM object rather than a string */\n if (!dirty) {\n dirty = '<!-->';\n }\n\n /* Stringify, in case dirty is an object */\n if (typeof dirty !== 'string' && !_isNode(dirty)) {\n // eslint-disable-next-line no-negated-condition\n if (typeof dirty.toString !== 'function') {\n throw typeErrorCreate('toString is not a function');\n } else {\n dirty = dirty.toString();\n if (typeof dirty !== 'string') {\n throw typeErrorCreate('dirty is not a string, aborting');\n }\n }\n }\n\n /* Check we can run. Otherwise fall back or ignore */\n if (!DOMPurify.isSupported) {\n if (\n typeof window.toStaticHTML === 'object' ||\n typeof window.toStaticHTML === 'function'\n ) {\n if (typeof dirty === 'string') {\n return window.toStaticHTML(dirty);\n }\n\n if (_isNode(dirty)) {\n return window.toStaticHTML(dirty.outerHTML);\n }\n }\n\n return dirty;\n }\n\n /* Assign config vars */\n if (!SET_CONFIG) {\n _parseConfig(cfg);\n }\n\n /* Clean up removed elements */\n DOMPurify.removed = [];\n\n /* Check if dirty is correctly typed for IN_PLACE */\n if (typeof dirty === 'string') {\n IN_PLACE = false;\n }\n\n if (IN_PLACE) {\n /* No special handling necessary for in-place sanitization */\n } else if (dirty instanceof Node) {\n /* If dirty is a DOM element, append to an empty document to avoid\n elements being stripped by the parser */\n body = _initDocument('<!-->');\n importedNode = body.ownerDocument.importNode(dirty, true);\n if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {\n /* Node is already a body, use as is */\n body = importedNode;\n } else if (importedNode.nodeName === 'HTML') {\n body = importedNode;\n } else {\n // eslint-disable-next-line unicorn/prefer-node-append\n body.appendChild(importedNode);\n }\n } else {\n /* Exit directly if we have nothing to do */\n if (\n !RETURN_DOM &&\n !SAFE_FOR_TEMPLATES &&\n !WHOLE_DOCUMENT &&\n RETURN_TRUSTED_TYPE &&\n dirty.indexOf('<') === -1\n ) {\n return trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(dirty)\n : dirty;\n }\n\n /* Initialize the document to work on */\n body = _initDocument(dirty);\n\n /* Check we have a DOM node from the data */\n if (!body) {\n return RETURN_DOM ? null : emptyHTML;\n }\n }\n\n /* Remove first element node (ours) if FORCE_BODY is set */\n if (body && FORCE_BODY) {\n _forceRemove(body.firstChild);\n }\n\n /* Get node iterator */\n const nodeIterator = _createIterator(IN_PLACE ? dirty : body);\n\n /* Now start iterating over the created document */\n while ((currentNode = nodeIterator.nextNode())) {\n /* Fix IE's strange behavior with manipulated textNodes #89 */\n if (currentNode.nodeType === 3 && currentNode === oldNode) {\n continue;\n }\n\n /* Sanitize tags and elements */\n if (_sanitizeElements(currentNode)) {\n continue;\n }\n\n /* Shadow DOM detected, sanitize it */\n if (currentNode.content instanceof DocumentFragment) {\n _sanitizeShadowDOM(currentNode.content);\n }\n\n /* Check attributes, sanitize if necessary */\n _sanitizeAttributes(currentNode);\n\n oldNode = currentNode;\n }\n\n oldNode = null;\n\n /* If we sanitized `dirty` in-place, return it. */\n if (IN_PLACE) {\n return dirty;\n }\n\n /* Return sanitized string or DOM */\n if (RETURN_DOM) {\n if (RETURN_DOM_FRAGMENT) {\n returnNode = createDocumentFragment.call(body.ownerDocument);\n\n while (body.firstChild) {\n // eslint-disable-next-line unicorn/prefer-node-append\n returnNode.appendChild(body.firstChild);\n }\n } else {\n returnNode = body;\n }\n\n if (RETURN_DOM_IMPORT) {\n /* AdoptNode() is not used because internal state is not reset\n (e.g. the past names map of a HTMLFormElement), this is safe\n in theory but we would rather not risk another attack vector.\n The state that is cloned by importNode() is explicitly defined\n by the specs. */\n returnNode = importNode.call(originalDocument, returnNode, true);\n }\n\n return returnNode;\n }\n\n let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n\n /* Sanitize final string template-safe */\n if (SAFE_FOR_TEMPLATES) {\n serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR, ' ');\n serializedHTML = stringReplace(serializedHTML, ERB_EXPR, ' ');\n }\n\n return trustedTypesPolicy && RETURN_TRUSTED_TYPE\n ? trustedTypesPolicy.createHTML(serializedHTML)\n : serializedHTML;\n };\n\n /**\n * Public method to set the configuration once\n * setConfig\n *\n * @param {Object} cfg configuration object\n */\n DOMPurify.setConfig = function(cfg) {\n _parseConfig(cfg);\n SET_CONFIG = true;\n };\n\n /**\n * Public method to remove the configuration\n * clearConfig\n *\n */\n DOMPurify.clearConfig = function() {\n CONFIG = null;\n SET_CONFIG = false;\n };\n\n /**\n * Public method to check if an attribute value is valid.\n * Uses last set config, if any. Otherwise, uses config defaults.\n * isValidAttribute\n *\n * @param {string} tag Tag name of containing element.\n * @param {string} attr Attribute name.\n * @param {string} value Attribute value.\n * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.\n */\n DOMPurify.isValidAttribute = function(tag, attr, value) {\n /* Initialize shared config vars if necessary. */\n if (!CONFIG) {\n _parseConfig({});\n }\n\n const lcTag = stringToLowerCase(tag);\n const lcName = stringToLowerCase(attr);\n return _isValidAttribute(lcTag, lcName, value);\n };\n\n /**\n * AddHook\n * Public method to add DOMPurify hooks\n *\n * @param {String} entryPoint entry point for the hook to add\n * @param {Function} hookFunction function to execute\n */\n DOMPurify.addHook = function(entryPoint, hookFunction) {\n if (typeof hookFunction !== 'function') {\n return;\n }\n\n hooks[entryPoint] = hooks[entryPoint] || [];\n arrayPush(hooks[entryPoint], hookFunction);\n };\n\n /**\n * RemoveHook\n * Public method to remove a DOMPurify hook at a given entryPoint\n * (pops it from the stack of hooks if more are present)\n *\n * @param {String} entryPoint entry point for the hook to remove\n */\n DOMPurify.removeHook = function(entryPoint) {\n if (hooks[entryPoint]) {\n arrayPop(hooks[entryPoint]);\n }\n };\n\n /**\n * RemoveHooks\n * Public method to remove all DOMPurify hooks at a given entryPoint\n *\n * @param {String} entryPoint entry point for the hooks to remove\n */\n DOMPurify.removeHooks = function(entryPoint) {\n if (hooks[entryPoint]) {\n hooks[entryPoint] = [];\n }\n };\n\n /**\n * RemoveAllHooks\n * Public method to remove all DOMPurify hooks\n *\n */\n DOMPurify.removeAllHooks = function() {\n hooks = {};\n };\n\n return DOMPurify;\n}\n\nexport default createDOMPurify();\n","/* flatpickr v4.6.3, @license MIT */\n(function (global, factory) {\n typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n typeof define === 'function' && define.amd ? define(factory) :\n (global = global || self, global.flatpickr = factory());\n}(this, function () { 'use strict';\n\n /*! *****************************************************************************\r\n Copyright (c) Microsoft Corporation. All rights reserved.\r\n Licensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\n this file except in compliance with the License. You may obtain a copy of the\r\n License at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\n THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\n KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\n WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\n MERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\n See the Apache Version 2.0 License for specific language governing permissions\r\n and limitations under the License.\r\n ***************************************************************************** */\r\n\r\n var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n };\r\n return __assign.apply(this, arguments);\r\n };\n\n var HOOKS = [\n \"onChange\",\n \"onClose\",\n \"onDayCreate\",\n \"onDestroy\",\n \"onKeyDown\",\n \"onMonthChange\",\n \"onOpen\",\n \"onParseConfig\",\n \"onReady\",\n \"onValueUpdate\",\n \"onYearChange\",\n \"onPreCalendarPosition\",\n ];\n var defaults = {\n _disable: [],\n _enable: [],\n allowInput: false,\n altFormat: \"F j, Y\",\n altInput: false,\n altInputClass: \"form-control input\",\n animate: typeof window === \"object\" &&\n window.navigator.userAgent.indexOf(\"MSIE\") === -1,\n ariaDateFormat: \"F j, Y\",\n clickOpens: true,\n closeOnSelect: true,\n conjunction: \", \",\n dateFormat: \"Y-m-d\",\n defaultHour: 12,\n defaultMinute: 0,\n defaultSeconds: 0,\n disable: [],\n disableMobile: false,\n enable: [],\n enableSeconds: false,\n enableTime: false,\n errorHandler: function (err) {\n return typeof console !== \"undefined\" && console.warn(err);\n },\n getWeek: function (givenDate) {\n var date = new Date(givenDate.getTime());\n date.setHours(0, 0, 0, 0);\n // Thursday in current week decides the year.\n date.setDate(date.getDate() + 3 - ((date.getDay() + 6) % 7));\n // January 4 is always in week 1.\n var week1 = new Date(date.getFullYear(), 0, 4);\n // Adjust to Thursday in week 1 and count number of weeks from date to week1.\n return (1 +\n Math.round(((date.getTime() - week1.getTime()) / 86400000 -\n 3 +\n ((week1.getDay() + 6) % 7)) /\n 7));\n },\n hourIncrement: 1,\n ignoredFocusElements: [],\n inline: false,\n locale: \"default\",\n minuteIncrement: 5,\n mode: \"single\",\n monthSelectorType: \"dropdown\",\n nextArrow: \"<svg version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' viewBox='0 0 17 17'><g></g><path d='M13.207 8.472l-7.854 7.854-0.707-0.707 7.146-7.146-7.146-7.148 0.707-0.707 7.854 7.854z' /></svg>\",\n noCalendar: false,\n now: new Date(),\n onChange: [],\n onClose: [],\n onDayCreate: [],\n onDestroy: [],\n onKeyDown: [],\n onMonthChange: [],\n onOpen: [],\n onParseConfig: [],\n onReady: [],\n onValueUpdate: [],\n onYearChange: [],\n onPreCalendarPosition: [],\n plugins: [],\n position: \"auto\",\n positionElement: undefined,\n prevArrow: \"<svg version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' viewBox='0 0 17 17'><g></g><path d='M5.207 8.471l7.146 7.147-0.707 0.707-7.853-7.854 7.854-7.853 0.707 0.707-7.147 7.146z' /></svg>\",\n shorthandCurrentMonth: false,\n showMonths: 1,\n static: false,\n time_24hr: false,\n weekNumbers: false,\n wrap: false\n };\n\n var english = {\n weekdays: {\n shorthand: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n longhand: [\n \"Sunday\",\n \"Monday\",\n \"Tuesday\",\n \"Wednesday\",\n \"Thursday\",\n \"Friday\",\n \"Saturday\",\n ]\n },\n months: {\n shorthand: [\n \"Jan\",\n \"Feb\",\n \"Mar\",\n \"Apr\",\n \"May\",\n \"Jun\",\n \"Jul\",\n \"Aug\",\n \"Sep\",\n \"Oct\",\n \"Nov\",\n \"Dec\",\n ],\n longhand: [\n \"January\",\n \"February\",\n \"March\",\n \"April\",\n \"May\",\n \"June\",\n \"July\",\n \"August\",\n \"September\",\n \"October\",\n \"November\",\n \"December\",\n ]\n },\n daysInMonth: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],\n firstDayOfWeek: 0,\n ordinal: function (nth) {\n var s = nth % 100;\n if (s > 3 && s < 21)\n return \"th\";\n switch (s % 10) {\n case 1:\n return \"st\";\n case 2:\n return \"nd\";\n case 3:\n return \"rd\";\n default:\n return \"th\";\n }\n },\n rangeSeparator: \" to \",\n weekAbbreviation: \"Wk\",\n scrollTitle: \"Scroll to increment\",\n toggleTitle: \"Click to toggle\",\n amPM: [\"AM\", \"PM\"],\n yearAriaLabel: \"Year\",\n hourAriaLabel: \"Hour\",\n minuteAriaLabel: \"Minute\",\n time_24hr: false\n };\n\n var pad = function (number) { return (\"0\" + number).slice(-2); };\n var int = function (bool) { return (bool === true ? 1 : 0); };\n /* istanbul ignore next */\n function debounce(func, wait, immediate) {\n if (immediate === void 0) { immediate = false; }\n var timeout;\n return function () {\n var context = this, args = arguments;\n timeout !== null && clearTimeout(timeout);\n timeout = window.setTimeout(function () {\n timeout = null;\n if (!immediate)\n func.apply(context, args);\n }, wait);\n if (immediate && !timeout)\n func.apply(context, args);\n };\n }\n var arrayify = function (obj) {\n return obj instanceof Array ? obj : [obj];\n };\n\n function toggleClass(elem, className, bool) {\n if (bool === true)\n return elem.classList.add(className);\n elem.classList.remove(className);\n }\n function createElement(tag, className, content) {\n var e = window.document.createElement(tag);\n className = className || \"\";\n content = content || \"\";\n e.className = className;\n if (content !== undefined)\n e.textContent = content;\n return e;\n }\n function clearNode(node) {\n while (node.firstChild)\n node.removeChild(node.firstChild);\n }\n function findParent(node, condition) {\n if (condition(node))\n return node;\n else if (node.parentNode)\n return findParent(node.parentNode, condition);\n return undefined; // nothing found\n }\n function createNumberInput(inputClassName, opts) {\n var wrapper = createElement(\"div\", \"numInputWrapper\"), numInput = createElement(\"input\", \"numInput \" + inputClassName), arrowUp = createElement(\"span\", \"arrowUp\"), arrowDown = createElement(\"span\", \"arrowDown\");\n if (navigator.userAgent.indexOf(\"MSIE 9.0\") === -1) {\n numInput.type = \"number\";\n }\n else {\n numInput.type = \"text\";\n numInput.pattern = \"\\\\d*\";\n }\n if (opts !== undefined)\n for (var key in opts)\n numInput.setAttribute(key, opts[key]);\n wrapper.appendChild(numInput);\n wrapper.appendChild(arrowUp);\n wrapper.appendChild(arrowDown);\n return wrapper;\n }\n function getEventTarget(event) {\n if (typeof event.composedPath === \"function\") {\n var path = event.composedPath();\n return path[0];\n }\n return event.target;\n }\n\n var doNothing = function () { return undefined; };\n var monthToStr = function (monthNumber, shorthand, locale) { return locale.months[shorthand ? \"shorthand\" : \"longhand\"][monthNumber]; };\n var revFormat = {\n D: doNothing,\n F: function (dateObj, monthName, locale) {\n dateObj.setMonth(locale.months.longhand.indexOf(monthName));\n },\n G: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n H: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n J: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n K: function (dateObj, amPM, locale) {\n dateObj.setHours((dateObj.getHours() % 12) +\n 12 * int(new RegExp(locale.amPM[1], \"i\").test(amPM)));\n },\n M: function (dateObj, shortMonth, locale) {\n dateObj.setMonth(locale.months.shorthand.indexOf(shortMonth));\n },\n S: function (dateObj, seconds) {\n dateObj.setSeconds(parseFloat(seconds));\n },\n U: function (_, unixSeconds) { return new Date(parseFloat(unixSeconds) * 1000); },\n W: function (dateObj, weekNum, locale) {\n var weekNumber = parseInt(weekNum);\n var date = new Date(dateObj.getFullYear(), 0, 2 + (weekNumber - 1) * 7, 0, 0, 0, 0);\n date.setDate(date.getDate() - date.getDay() + locale.firstDayOfWeek);\n return date;\n },\n Y: function (dateObj, year) {\n dateObj.setFullYear(parseFloat(year));\n },\n Z: function (_, ISODate) { return new Date(ISODate); },\n d: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n h: function (dateObj, hour) {\n dateObj.setHours(parseFloat(hour));\n },\n i: function (dateObj, minutes) {\n dateObj.setMinutes(parseFloat(minutes));\n },\n j: function (dateObj, day) {\n dateObj.setDate(parseFloat(day));\n },\n l: doNothing,\n m: function (dateObj, month) {\n dateObj.setMonth(parseFloat(month) - 1);\n },\n n: function (dateObj, month) {\n dateObj.setMonth(parseFloat(month) - 1);\n },\n s: function (dateObj, seconds) {\n dateObj.setSeconds(parseFloat(seconds));\n },\n u: function (_, unixMillSeconds) {\n return new Date(parseFloat(unixMillSeconds));\n },\n w: doNothing,\n y: function (dateObj, year) {\n dateObj.setFullYear(2000 + parseFloat(year));\n }\n };\n var tokenRegex = {\n D: \"(\\\\w+)\",\n F: \"(\\\\w+)\",\n G: \"(\\\\d\\\\d|\\\\d)\",\n H: \"(\\\\d\\\\d|\\\\d)\",\n J: \"(\\\\d\\\\d|\\\\d)\\\\w+\",\n K: \"\",\n M: \"(\\\\w+)\",\n S: \"(\\\\d\\\\d|\\\\d)\",\n U: \"(.+)\",\n W: \"(\\\\d\\\\d|\\\\d)\",\n Y: \"(\\\\d{4})\",\n Z: \"(.+)\",\n d: \"(\\\\d\\\\d|\\\\d)\",\n h: \"(\\\\d\\\\d|\\\\d)\",\n i: \"(\\\\d\\\\d|\\\\d)\",\n j: \"(\\\\d\\\\d|\\\\d)\",\n l: \"(\\\\w+)\",\n m: \"(\\\\d\\\\d|\\\\d)\",\n n: \"(\\\\d\\\\d|\\\\d)\",\n s: \"(\\\\d\\\\d|\\\\d)\",\n u: \"(.+)\",\n w: \"(\\\\d\\\\d|\\\\d)\",\n y: \"(\\\\d{2})\"\n };\n var formats = {\n // get the date in UTC\n Z: function (date) { return date.toISOString(); },\n // weekday name, short, e.g. Thu\n D: function (date, locale, options) {\n return locale.weekdays.shorthand[formats.w(date, locale, options)];\n },\n // full month name e.g. January\n F: function (date, locale, options) {\n return monthToStr(formats.n(date, locale, options) - 1, false, locale);\n },\n // padded hour 1-12\n G: function (date, locale, options) {\n return pad(formats.h(date, locale, options));\n },\n // hours with leading zero e.g. 03\n H: function (date) { return pad(date.getHours()); },\n // day (1-30) with ordinal suffix e.g. 1st, 2nd\n J: function (date, locale) {\n return locale.ordinal !== undefined\n ? date.getDate() + locale.ordinal(date.getDate())\n : date.getDate();\n },\n // AM/PM\n K: function (date, locale) { return locale.amPM[int(date.getHours() > 11)]; },\n // shorthand month e.g. Jan, Sep, Oct, etc\n M: function (date, locale) {\n return monthToStr(date.getMonth(), true, locale);\n },\n // seconds 00-59\n S: function (date) { return pad(date.getSeconds()); },\n // unix timestamp\n U: function (date) { return date.getTime() / 1000; },\n W: function (date, _, options) {\n return options.getWeek(date);\n },\n // full year e.g. 2016\n Y: function (date) { return date.getFullYear(); },\n // day in month, padded (01-30)\n d: function (date) { return pad(date.getDate()); },\n // hour from 1-12 (am/pm)\n h: function (date) { return (date.getHours() % 12 ? date.getHours() % 12 : 12); },\n // minutes, padded with leading zero e.g. 09\n i: function (date) { return pad(date.getMinutes()); },\n // day in month (1-30)\n j: function (date) { return date.getDate(); },\n // weekday name, full, e.g. Thursday\n l: function (date, locale) {\n return locale.weekdays.longhand[date.getDay()];\n },\n // padded month number (01-12)\n m: function (date) { return pad(date.getMonth() + 1); },\n // the month number (1-12)\n n: function (date) { return date.getMonth() + 1; },\n // seconds 0-59\n s: function (date) { return date.getSeconds(); },\n // Unix Milliseconds\n u: function (date) { return date.getTime(); },\n // number of the day of the week\n w: function (date) { return date.getDay(); },\n // last two digits of year e.g. 16 for 2016\n y: function (date) { return String(date.getFullYear()).substring(2); }\n };\n\n var createDateFormatter = function (_a) {\n var _b = _a.config, config = _b === void 0 ? defaults : _b, _c = _a.l10n, l10n = _c === void 0 ? english : _c;\n return function (dateObj, frmt, overrideLocale) {\n var locale = overrideLocale || l10n;\n if (config.formatDate !== undefined) {\n return config.formatDate(dateObj, frmt, locale);\n }\n return frmt\n .split(\"\")\n .map(function (c, i, arr) {\n return formats[c] && arr[i - 1] !== \"\\\\\"\n ? formats[c](dateObj, locale, config)\n : c !== \"\\\\\"\n ? c\n : \"\";\n })\n .join(\"\");\n };\n };\n var createDateParser = function (_a) {\n var _b = _a.config, config = _b === void 0 ? defaults : _b, _c = _a.l10n, l10n = _c === void 0 ? english : _c;\n return function (date, givenFormat, timeless, customLocale) {\n if (date !== 0 && !date)\n return undefined;\n var locale = customLocale || l10n;\n var parsedDate;\n var dateOrig = date;\n if (date instanceof Date)\n parsedDate = new Date(date.getTime());\n else if (typeof date !== \"string\" &&\n date.toFixed !== undefined // timestamp\n )\n // create a copy\n parsedDate = new Date(date);\n else if (typeof date === \"string\") {\n // date string\n var format = givenFormat || (config || defaults).dateFormat;\n var datestr = String(date).trim();\n if (datestr === \"today\") {\n parsedDate = new Date();\n timeless = true;\n }\n else if (/Z$/.test(datestr) ||\n /GMT$/.test(datestr) // datestrings w/ timezone\n )\n parsedDate = new Date(date);\n else if (config && config.parseDate)\n parsedDate = config.parseDate(date, format);\n else {\n parsedDate =\n !config || !config.noCalendar\n ? new Date(new Date().getFullYear(), 0, 1, 0, 0, 0, 0)\n : new Date(new Date().setHours(0, 0, 0, 0));\n var matched = void 0, ops = [];\n for (var i = 0, matchIndex = 0, regexStr = \"\"; i < format.length; i++) {\n var token_1 = format[i];\n var isBackSlash = token_1 === \"\\\\\";\n var escaped = format[i - 1] === \"\\\\\" || isBackSlash;\n if (tokenRegex[token_1] && !escaped) {\n regexStr += tokenRegex[token_1];\n var match = new RegExp(regexStr).exec(date);\n if (match && (matched = true)) {\n ops[token_1 !== \"Y\" ? \"push\" : \"unshift\"]({\n fn: revFormat[token_1],\n val: match[++matchIndex]\n });\n }\n }\n else if (!isBackSlash)\n regexStr += \".\"; // don't really care\n ops.forEach(function (_a) {\n var fn = _a.fn, val = _a.val;\n return (parsedDate = fn(parsedDate, val, locale) || parsedDate);\n });\n }\n parsedDate = matched ? parsedDate : undefined;\n }\n }\n /* istanbul ignore next */\n if (!(parsedDate instanceof Date && !isNaN(parsedDate.getTime()))) {\n config.errorHandler(new Error(\"Invalid date provided: \" + dateOrig));\n return undefined;\n }\n if (timeless === true)\n parsedDate.setHours(0, 0, 0, 0);\n return parsedDate;\n };\n };\n /**\n * Compute the difference in dates, measured in ms\n */\n function compareDates(date1, date2, timeless) {\n if (timeless === void 0) { timeless = true; }\n if (timeless !== false) {\n return (new Date(date1.getTime()).setHours(0, 0, 0, 0) -\n new Date(date2.getTime()).setHours(0, 0, 0, 0));\n }\n return date1.getTime() - date2.getTime();\n }\n var isBetween = function (ts, ts1, ts2) {\n return ts > Math.min(ts1, ts2) && ts < Math.max(ts1, ts2);\n };\n var duration = {\n DAY: 86400000\n };\n\n if (typeof Object.assign !== \"function\") {\n Object.assign = function (target) {\n var args = [];\n for (var _i = 1; _i < arguments.length; _i++) {\n args[_i - 1] = arguments[_i];\n }\n if (!target) {\n throw TypeError(\"Cannot convert undefined or null to object\");\n }\n var _loop_1 = function (source) {\n if (source) {\n Object.keys(source).forEach(function (key) { return (target[key] = source[key]); });\n }\n };\n for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {\n var source = args_1[_a];\n _loop_1(source);\n }\n return target;\n };\n }\n\n var DEBOUNCED_CHANGE_MS = 300;\n function FlatpickrInstance(element, instanceConfig) {\n var self = {\n config: __assign({}, defaults, flatpickr.defaultConfig),\n l10n: english\n };\n self.parseDate = createDateParser({ config: self.config, l10n: self.l10n });\n self._handlers = [];\n self.pluginElements = [];\n self.loadedPlugins = [];\n self._bind = bind;\n self._setHoursFromDate = setHoursFromDate;\n self._positionCalendar = positionCalendar;\n self.changeMonth = changeMonth;\n self.changeYear = changeYear;\n self.clear = clear;\n self.close = close;\n self._createElement = createElement;\n self.destroy = destroy;\n self.isEnabled = isEnabled;\n self.jumpToDate = jumpToDate;\n self.open = open;\n self.redraw = redraw;\n self.set = set;\n self.setDate = setDate;\n self.toggle = toggle;\n function setupHelperFunctions() {\n self.utils = {\n getDaysInMonth: function (month, yr) {\n if (month === void 0) { month = self.currentMonth; }\n if (yr === void 0) { yr = self.currentYear; }\n if (month === 1 && ((yr % 4 === 0 && yr % 100 !== 0) || yr % 400 === 0))\n return 29;\n return self.l10n.daysInMonth[month];\n }\n };\n }\n function init() {\n self.element = self.input = element;\n self.isOpen = false;\n parseConfig();\n setupLocale();\n setupInputs();\n setupDates();\n setupHelperFunctions();\n if (!self.isMobile)\n build();\n bindEvents();\n if (self.selectedDates.length || self.config.noCalendar) {\n if (self.config.enableTime) {\n setHoursFromDate(self.config.noCalendar\n ? self.latestSelectedDateObj || self.config.minDate\n : undefined);\n }\n updateValue(false);\n }\n setCalendarWidth();\n self.showTimeInput =\n self.selectedDates.length > 0 || self.config.noCalendar;\n var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);\n /* TODO: investigate this further\n \n Currently, there is weird positioning behavior in safari causing pages\n to scroll up. https://github.com/chmln/flatpickr/issues/563\n \n However, most browsers are not Safari and positioning is expensive when used\n in scale. https://github.com/chmln/flatpickr/issues/1096\n */\n if (!self.isMobile && isSafari) {\n positionCalendar();\n }\n triggerEvent(\"onReady\");\n }\n function bindToInstance(fn) {\n return fn.bind(self);\n }\n function setCalendarWidth() {\n var config = self.config;\n if (config.weekNumbers === false && config.showMonths === 1)\n return;\n else if (config.noCalendar !== true) {\n window.requestAnimationFrame(function () {\n if (self.calendarContainer !== undefined) {\n self.calendarContainer.style.visibility = \"hidden\";\n self.calendarContainer.style.display = \"block\";\n }\n if (self.daysContainer !== undefined) {\n var daysWidth = (self.days.offsetWidth + 1) * config.showMonths;\n self.daysContainer.style.width = daysWidth + \"px\";\n self.calendarContainer.style.width =\n daysWidth +\n (self.weekWrapper !== undefined\n ? self.weekWrapper.offsetWidth\n : 0) +\n \"px\";\n self.calendarContainer.style.removeProperty(\"visibility\");\n self.calendarContainer.style.removeProperty(\"display\");\n }\n });\n }\n }\n /**\n * The handler for all events targeting the time inputs\n */\n function updateTime(e) {\n if (self.selectedDates.length === 0) {\n setDefaultTime();\n }\n if (e !== undefined && e.type !== \"blur\") {\n timeWrapper(e);\n }\n var prevValue = self._input.value;\n setHoursFromInputs();\n updateValue();\n if (self._input.value !== prevValue) {\n self._debouncedChange();\n }\n }\n function ampm2military(hour, amPM) {\n return (hour % 12) + 12 * int(amPM === self.l10n.amPM[1]);\n }\n function military2ampm(hour) {\n switch (hour % 24) {\n case 0:\n case 12:\n return 12;\n default:\n return hour % 12;\n }\n }\n /**\n * Syncs the selected date object time with user's time input\n */\n function setHoursFromInputs() {\n if (self.hourElement === undefined || self.minuteElement === undefined)\n return;\n var hours = (parseInt(self.hourElement.value.slice(-2), 10) || 0) % 24, minutes = (parseInt(self.minuteElement.value, 10) || 0) % 60, seconds = self.secondElement !== undefined\n ? (parseInt(self.secondElement.value, 10) || 0) % 60\n : 0;\n if (self.amPM !== undefined) {\n hours = ampm2military(hours, self.amPM.textContent);\n }\n var limitMinHours = self.config.minTime !== undefined ||\n (self.config.minDate &&\n self.minDateHasTime &&\n self.latestSelectedDateObj &&\n compareDates(self.latestSelectedDateObj, self.config.minDate, true) ===\n 0);\n var limitMaxHours = self.config.maxTime !== undefined ||\n (self.config.maxDate &&\n self.maxDateHasTime &&\n self.latestSelectedDateObj &&\n compareDates(self.latestSelectedDateObj, self.config.maxDate, true) ===\n 0);\n if (limitMaxHours) {\n var maxTime = self.config.maxTime !== undefined\n ? self.config.maxTime\n : self.config.maxDate;\n hours = Math.min(hours, maxTime.getHours());\n if (hours === maxTime.getHours())\n minutes = Math.min(minutes, maxTime.getMinutes());\n if (minutes === maxTime.getMinutes())\n seconds = Math.min(seconds, maxTime.getSeconds());\n }\n if (limitMinHours) {\n var minTime = self.config.minTime !== undefined\n ? self.config.minTime\n : self.config.minDate;\n hours = Math.max(hours, minTime.getHours());\n if (hours === minTime.getHours())\n minutes = Math.max(minutes, minTime.getMinutes());\n if (minutes === minTime.getMinutes())\n seconds = Math.max(seconds, minTime.getSeconds());\n }\n setHours(hours, minutes, seconds);\n }\n /**\n * Syncs time input values with a date\n */\n function setHoursFromDate(dateObj) {\n var date = dateObj || self.latestSelectedDateObj;\n if (date)\n setHours(date.getHours(), date.getMinutes(), date.getSeconds());\n }\n function setDefaultHours() {\n var hours = self.config.defaultHour;\n var minutes = self.config.defaultMinute;\n var seconds = self.config.defaultSeconds;\n if (self.config.minDate !== undefined) {\n var minHr = self.config.minDate.getHours();\n var minMinutes = self.config.minDate.getMinutes();\n hours = Math.max(hours, minHr);\n if (hours === minHr)\n minutes = Math.max(minMinutes, minutes);\n if (hours === minHr && minutes === minMinutes)\n seconds = self.config.minDate.getSeconds();\n }\n if (self.config.maxDate !== undefined) {\n var maxHr = self.config.maxDate.getHours();\n var maxMinutes = self.config.maxDate.getMinutes();\n hours = Math.min(hours, maxHr);\n if (hours === maxHr)\n minutes = Math.min(maxMinutes, minutes);\n if (hours === maxHr && minutes === maxMinutes)\n seconds = self.config.maxDate.getSeconds();\n }\n setHours(hours, minutes, seconds);\n }\n /**\n * Sets the hours, minutes, and optionally seconds\n * of the latest selected date object and the\n * corresponding time inputs\n * @param {Number} hours the hour. whether its military\n * or am-pm gets inferred from config\n * @param {Number} minutes the minutes\n * @param {Number} seconds the seconds (optional)\n */\n function setHours(hours, minutes, seconds) {\n if (self.latestSelectedDateObj !== undefined) {\n self.latestSelectedDateObj.setHours(hours % 24, minutes, seconds || 0, 0);\n }\n if (!self.hourElement || !self.minuteElement || self.isMobile)\n return;\n self.hourElement.value = pad(!self.config.time_24hr\n ? ((12 + hours) % 12) + 12 * int(hours % 12 === 0)\n : hours);\n self.minuteElement.value = pad(minutes);\n if (self.amPM !== undefined)\n self.amPM.textContent = self.l10n.amPM[int(hours >= 12)];\n if (self.secondElement !== undefined)\n self.secondElement.value = pad(seconds);\n }\n /**\n * Handles the year input and incrementing events\n * @param {Event} event the keyup or increment event\n */\n function onYearInput(event) {\n var year = parseInt(event.target.value) + (event.delta || 0);\n if (year / 1000 > 1 ||\n (event.key === \"Enter\" && !/[^\\d]/.test(year.toString()))) {\n changeYear(year);\n }\n }\n /**\n * Essentially addEventListener + tracking\n * @param {Element} element the element to addEventListener to\n * @param {String} event the event name\n * @param {Function} handler the event handler\n */\n function bind(element, event, handler, options) {\n if (event instanceof Array)\n return event.forEach(function (ev) { return bind(element, ev, handler, options); });\n if (element instanceof Array)\n return element.forEach(function (el) { return bind(el, event, handler, options); });\n element.addEventListener(event, handler, options);\n self._handlers.push({\n element: element,\n event: event,\n handler: handler,\n options: options\n });\n }\n /**\n * A mousedown handler which mimics click.\n * Minimizes latency, since we don't need to wait for mouseup in most cases.\n * Also, avoids handling right clicks.\n *\n * @param {Function} handler the event handler\n */\n function onClick(handler) {\n return function (evt) {\n evt.which === 1 && handler(evt);\n };\n }\n function triggerChange() {\n triggerEvent(\"onChange\");\n }\n /**\n * Adds all the necessary event listeners\n */\n function bindEvents() {\n if (self.config.wrap) {\n [\"open\", \"close\", \"toggle\", \"clear\"].forEach(function (evt) {\n Array.prototype.forEach.call(self.element.querySelectorAll(\"[data-\" + evt + \"]\"), function (el) {\n return bind(el, \"click\", self[evt]);\n });\n });\n }\n if (self.isMobile) {\n setupMobile();\n return;\n }\n var debouncedResize = debounce(onResize, 50);\n self._debouncedChange = debounce(triggerChange, DEBOUNCED_CHANGE_MS);\n if (self.daysContainer && !/iPhone|iPad|iPod/i.test(navigator.userAgent))\n bind(self.daysContainer, \"mouseover\", function (e) {\n if (self.config.mode === \"range\")\n onMouseOver(e.target);\n });\n bind(window.document.body, \"keydown\", onKeyDown);\n if (!self.config.inline && !self.config.static)\n bind(window, \"resize\", debouncedResize);\n if (window.ontouchstart !== undefined)\n bind(window.document, \"touchstart\", documentClick);\n else\n bind(window.document, \"mousedown\", onClick(documentClick));\n bind(window.document, \"focus\", documentClick, { capture: true });\n if (self.config.clickOpens === true) {\n bind(self._input, \"focus\", self.open);\n bind(self._input, \"mousedown\", onClick(self.open));\n }\n if (self.daysContainer !== undefined) {\n bind(self.monthNav, \"mousedown\", onClick(onMonthNavClick));\n bind(self.monthNav, [\"keyup\", \"increment\"], onYearInput);\n bind(self.daysContainer, \"mousedown\", onClick(selectDate));\n }\n if (self.timeContainer !== undefined &&\n self.minuteElement !== undefined &&\n self.hourElement !== undefined) {\n var selText = function (e) {\n return e.target.select();\n };\n bind(self.timeContainer, [\"increment\"], updateTime);\n bind(self.timeContainer, \"blur\", updateTime, { capture: true });\n bind(self.timeContainer, \"mousedown\", onClick(timeIncrement));\n bind([self.hourElement, self.minuteElement], [\"focus\", \"click\"], selText);\n if (self.secondElement !== undefined)\n bind(self.secondElement, \"focus\", function () { return self.secondElement && self.secondElement.select(); });\n if (self.amPM !== undefined) {\n bind(self.amPM, \"mousedown\", onClick(function (e) {\n updateTime(e);\n triggerChange();\n }));\n }\n }\n }\n /**\n * Set the calendar view to a particular date.\n * @param {Date} jumpDate the date to set the view to\n * @param {boolean} triggerChange if change events should be triggered\n */\n function jumpToDate(jumpDate, triggerChange) {\n var jumpTo = jumpDate !== undefined\n ? self.parseDate(jumpDate)\n : self.latestSelectedDateObj ||\n (self.config.minDate && self.config.minDate > self.now\n ? self.config.minDate\n : self.config.maxDate && self.config.maxDate < self.now\n ? self.config.maxDate\n : self.now);\n var oldYear = self.currentYear;\n var oldMonth = self.currentMonth;\n try {\n if (jumpTo !== undefined) {\n self.currentYear = jumpTo.getFullYear();\n self.currentMonth = jumpTo.getMonth();\n }\n }\n catch (e) {\n /* istanbul ignore next */\n e.message = \"Invalid date supplied: \" + jumpTo;\n self.config.errorHandler(e);\n }\n if (triggerChange && self.currentYear !== oldYear) {\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n if (triggerChange &&\n (self.currentYear !== oldYear || self.currentMonth !== oldMonth)) {\n triggerEvent(\"onMonthChange\");\n }\n self.redraw();\n }\n /**\n * The up/down arrow handler for time inputs\n * @param {Event} e the click event\n */\n function timeIncrement(e) {\n if (~e.target.className.indexOf(\"arrow\"))\n incrementNumInput(e, e.target.classList.contains(\"arrowUp\") ? 1 : -1);\n }\n /**\n * Increments/decrements the value of input associ-\n * ated with the up/down arrow by dispatching an\n * \"increment\" event on the input.\n *\n * @param {Event} e the click event\n * @param {Number} delta the diff (usually 1 or -1)\n * @param {Element} inputElem the input element\n */\n function incrementNumInput(e, delta, inputElem) {\n var target = e && e.target;\n var input = inputElem ||\n (target && target.parentNode && target.parentNode.firstChild);\n var event = createEvent(\"increment\");\n event.delta = delta;\n input && input.dispatchEvent(event);\n }\n function build() {\n var fragment = window.document.createDocumentFragment();\n self.calendarContainer = createElement(\"div\", \"flatpickr-calendar\");\n self.calendarContainer.tabIndex = -1;\n if (!self.config.noCalendar) {\n fragment.appendChild(buildMonthNav());\n self.innerContainer = createElement(\"div\", \"flatpickr-innerContainer\");\n if (self.config.weekNumbers) {\n var _a = buildWeeks(), weekWrapper = _a.weekWrapper, weekNumbers = _a.weekNumbers;\n self.innerContainer.appendChild(weekWrapper);\n self.weekNumbers = weekNumbers;\n self.weekWrapper = weekWrapper;\n }\n self.rContainer = createElement(\"div\", \"flatpickr-rContainer\");\n self.rContainer.appendChild(buildWeekdays());\n if (!self.daysContainer) {\n self.daysContainer = createElement(\"div\", \"flatpickr-days\");\n self.daysContainer.tabIndex = -1;\n }\n buildDays();\n self.rContainer.appendChild(self.daysContainer);\n self.innerContainer.appendChild(self.rContainer);\n fragment.appendChild(self.innerContainer);\n }\n if (self.config.enableTime) {\n fragment.appendChild(buildTime());\n }\n toggleClass(self.calendarContainer, \"rangeMode\", self.config.mode === \"range\");\n toggleClass(self.calendarContainer, \"animate\", self.config.animate === true);\n toggleClass(self.calendarContainer, \"multiMonth\", self.config.showMonths > 1);\n self.calendarContainer.appendChild(fragment);\n var customAppend = self.config.appendTo !== undefined &&\n self.config.appendTo.nodeType !== undefined;\n if (self.config.inline || self.config.static) {\n self.calendarContainer.classList.add(self.config.inline ? \"inline\" : \"static\");\n if (self.config.inline) {\n if (!customAppend && self.element.parentNode)\n self.element.parentNode.insertBefore(self.calendarContainer, self._input.nextSibling);\n else if (self.config.appendTo !== undefined)\n self.config.appendTo.appendChild(self.calendarContainer);\n }\n if (self.config.static) {\n var wrapper = createElement(\"div\", \"flatpickr-wrapper\");\n if (self.element.parentNode)\n self.element.parentNode.insertBefore(wrapper, self.element);\n wrapper.appendChild(self.element);\n if (self.altInput)\n wrapper.appendChild(self.altInput);\n wrapper.appendChild(self.calendarContainer);\n }\n }\n if (!self.config.static && !self.config.inline)\n (self.config.appendTo !== undefined\n ? self.config.appendTo\n : window.document.body).appendChild(self.calendarContainer);\n }\n function createDay(className, date, dayNumber, i) {\n var dateIsEnabled = isEnabled(date, true), dayElement = createElement(\"span\", \"flatpickr-day \" + className, date.getDate().toString());\n dayElement.dateObj = date;\n dayElement.$i = i;\n dayElement.setAttribute(\"aria-label\", self.formatDate(date, self.config.ariaDateFormat));\n if (className.indexOf(\"hidden\") === -1 &&\n compareDates(date, self.now) === 0) {\n self.todayDateElem = dayElement;\n dayElement.classList.add(\"today\");\n dayElement.setAttribute(\"aria-current\", \"date\");\n }\n if (dateIsEnabled) {\n dayElement.tabIndex = -1;\n if (isDateSelected(date)) {\n dayElement.classList.add(\"selected\");\n self.selectedDateElem = dayElement;\n if (self.config.mode === \"range\") {\n toggleClass(dayElement, \"startRange\", self.selectedDates[0] &&\n compareDates(date, self.selectedDates[0], true) === 0);\n toggleClass(dayElement, \"endRange\", self.selectedDates[1] &&\n compareDates(date, self.selectedDates[1], true) === 0);\n if (className === \"nextMonthDay\")\n dayElement.classList.add(\"inRange\");\n }\n }\n }\n else {\n dayElement.classList.add(\"flatpickr-disabled\");\n }\n if (self.config.mode === \"range\") {\n if (isDateInRange(date) && !isDateSelected(date))\n dayElement.classList.add(\"inRange\");\n }\n if (self.weekNumbers &&\n self.config.showMonths === 1 &&\n className !== \"prevMonthDay\" &&\n dayNumber % 7 === 1) {\n self.weekNumbers.insertAdjacentHTML(\"beforeend\", \"<span class='flatpickr-day'>\" + self.config.getWeek(date) + \"</span>\");\n }\n triggerEvent(\"onDayCreate\", dayElement);\n return dayElement;\n }\n function focusOnDayElem(targetNode) {\n targetNode.focus();\n if (self.config.mode === \"range\")\n onMouseOver(targetNode);\n }\n function getFirstAvailableDay(delta) {\n var startMonth = delta > 0 ? 0 : self.config.showMonths - 1;\n var endMonth = delta > 0 ? self.config.showMonths : -1;\n for (var m = startMonth; m != endMonth; m += delta) {\n var month = self.daysContainer.children[m];\n var startIndex = delta > 0 ? 0 : month.children.length - 1;\n var endIndex = delta > 0 ? month.children.length : -1;\n for (var i = startIndex; i != endIndex; i += delta) {\n var c = month.children[i];\n if (c.className.indexOf(\"hidden\") === -1 && isEnabled(c.dateObj))\n return c;\n }\n }\n return undefined;\n }\n function getNextAvailableDay(current, delta) {\n var givenMonth = current.className.indexOf(\"Month\") === -1\n ? current.dateObj.getMonth()\n : self.currentMonth;\n var endMonth = delta > 0 ? self.config.showMonths : -1;\n var loopDelta = delta > 0 ? 1 : -1;\n for (var m = givenMonth - self.currentMonth; m != endMonth; m += loopDelta) {\n var month = self.daysContainer.children[m];\n var startIndex = givenMonth - self.currentMonth === m\n ? current.$i + delta\n : delta < 0\n ? month.children.length - 1\n : 0;\n var numMonthDays = month.children.length;\n for (var i = startIndex; i >= 0 && i < numMonthDays && i != (delta > 0 ? numMonthDays : -1); i += loopDelta) {\n var c = month.children[i];\n if (c.className.indexOf(\"hidden\") === -1 &&\n isEnabled(c.dateObj) &&\n Math.abs(current.$i - i) >= Math.abs(delta))\n return focusOnDayElem(c);\n }\n }\n self.changeMonth(loopDelta);\n focusOnDay(getFirstAvailableDay(loopDelta), 0);\n return undefined;\n }\n function focusOnDay(current, offset) {\n var dayFocused = isInView(document.activeElement || document.body);\n var startElem = current !== undefined\n ? current\n : dayFocused\n ? document.activeElement\n : self.selectedDateElem !== undefined && isInView(self.selectedDateElem)\n ? self.selectedDateElem\n : self.todayDateElem !== undefined && isInView(self.todayDateElem)\n ? self.todayDateElem\n : getFirstAvailableDay(offset > 0 ? 1 : -1);\n if (startElem === undefined)\n return self._input.focus();\n if (!dayFocused)\n return focusOnDayElem(startElem);\n getNextAvailableDay(startElem, offset);\n }\n function buildMonthDays(year, month) {\n var firstOfMonth = (new Date(year, month, 1).getDay() - self.l10n.firstDayOfWeek + 7) % 7;\n var prevMonthDays = self.utils.getDaysInMonth((month - 1 + 12) % 12);\n var daysInMonth = self.utils.getDaysInMonth(month), days = window.document.createDocumentFragment(), isMultiMonth = self.config.showMonths > 1, prevMonthDayClass = isMultiMonth ? \"prevMonthDay hidden\" : \"prevMonthDay\", nextMonthDayClass = isMultiMonth ? \"nextMonthDay hidden\" : \"nextMonthDay\";\n var dayNumber = prevMonthDays + 1 - firstOfMonth, dayIndex = 0;\n // prepend days from the ending of previous month\n for (; dayNumber <= prevMonthDays; dayNumber++, dayIndex++) {\n days.appendChild(createDay(prevMonthDayClass, new Date(year, month - 1, dayNumber), dayNumber, dayIndex));\n }\n // Start at 1 since there is no 0th day\n for (dayNumber = 1; dayNumber <= daysInMonth; dayNumber++, dayIndex++) {\n days.appendChild(createDay(\"\", new Date(year, month, dayNumber), dayNumber, dayIndex));\n }\n // append days from the next month\n for (var dayNum = daysInMonth + 1; dayNum <= 42 - firstOfMonth &&\n (self.config.showMonths === 1 || dayIndex % 7 !== 0); dayNum++, dayIndex++) {\n days.appendChild(createDay(nextMonthDayClass, new Date(year, month + 1, dayNum % daysInMonth), dayNum, dayIndex));\n }\n //updateNavigationCurrentMonth();\n var dayContainer = createElement(\"div\", \"dayContainer\");\n dayContainer.appendChild(days);\n return dayContainer;\n }\n function buildDays() {\n if (self.daysContainer === undefined) {\n return;\n }\n clearNode(self.daysContainer);\n // TODO: week numbers for each month\n if (self.weekNumbers)\n clearNode(self.weekNumbers);\n var frag = document.createDocumentFragment();\n for (var i = 0; i < self.config.showMonths; i++) {\n var d = new Date(self.currentYear, self.currentMonth, 1);\n d.setMonth(self.currentMonth + i);\n frag.appendChild(buildMonthDays(d.getFullYear(), d.getMonth()));\n }\n self.daysContainer.appendChild(frag);\n self.days = self.daysContainer.firstChild;\n if (self.config.mode === \"range\" && self.selectedDates.length === 1) {\n onMouseOver();\n }\n }\n function buildMonthSwitch() {\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType !== \"dropdown\")\n return;\n var shouldBuildMonth = function (month) {\n if (self.config.minDate !== undefined &&\n self.currentYear === self.config.minDate.getFullYear() &&\n month < self.config.minDate.getMonth()) {\n return false;\n }\n return !(self.config.maxDate !== undefined &&\n self.currentYear === self.config.maxDate.getFullYear() &&\n month > self.config.maxDate.getMonth());\n };\n self.monthsDropdownContainer.tabIndex = -1;\n self.monthsDropdownContainer.innerHTML = \"\";\n for (var i = 0; i < 12; i++) {\n if (!shouldBuildMonth(i))\n continue;\n var month = createElement(\"option\", \"flatpickr-monthDropdown-month\");\n month.value = new Date(self.currentYear, i).getMonth().toString();\n month.textContent = monthToStr(i, self.config.shorthandCurrentMonth, self.l10n);\n month.tabIndex = -1;\n if (self.currentMonth === i) {\n month.selected = true;\n }\n self.monthsDropdownContainer.appendChild(month);\n }\n }\n function buildMonth() {\n var container = createElement(\"div\", \"flatpickr-month\");\n var monthNavFragment = window.document.createDocumentFragment();\n var monthElement;\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType === \"static\") {\n monthElement = createElement(\"span\", \"cur-month\");\n }\n else {\n self.monthsDropdownContainer = createElement(\"select\", \"flatpickr-monthDropdown-months\");\n bind(self.monthsDropdownContainer, \"change\", function (e) {\n var target = e.target;\n var selectedMonth = parseInt(target.value, 10);\n self.changeMonth(selectedMonth - self.currentMonth);\n triggerEvent(\"onMonthChange\");\n });\n buildMonthSwitch();\n monthElement = self.monthsDropdownContainer;\n }\n var yearInput = createNumberInput(\"cur-year\", { tabindex: \"-1\" });\n var yearElement = yearInput.getElementsByTagName(\"input\")[0];\n yearElement.setAttribute(\"aria-label\", self.l10n.yearAriaLabel);\n if (self.config.minDate) {\n yearElement.setAttribute(\"min\", self.config.minDate.getFullYear().toString());\n }\n if (self.config.maxDate) {\n yearElement.setAttribute(\"max\", self.config.maxDate.getFullYear().toString());\n yearElement.disabled =\n !!self.config.minDate &&\n self.config.minDate.getFullYear() === self.config.maxDate.getFullYear();\n }\n var currentMonth = createElement(\"div\", \"flatpickr-current-month\");\n currentMonth.appendChild(monthElement);\n currentMonth.appendChild(yearInput);\n monthNavFragment.appendChild(currentMonth);\n container.appendChild(monthNavFragment);\n return {\n container: container,\n yearElement: yearElement,\n monthElement: monthElement\n };\n }\n function buildMonths() {\n clearNode(self.monthNav);\n self.monthNav.appendChild(self.prevMonthNav);\n if (self.config.showMonths) {\n self.yearElements = [];\n self.monthElements = [];\n }\n for (var m = self.config.showMonths; m--;) {\n var month = buildMonth();\n self.yearElements.push(month.yearElement);\n self.monthElements.push(month.monthElement);\n self.monthNav.appendChild(month.container);\n }\n self.monthNav.appendChild(self.nextMonthNav);\n }\n function buildMonthNav() {\n self.monthNav = createElement(\"div\", \"flatpickr-months\");\n self.yearElements = [];\n self.monthElements = [];\n self.prevMonthNav = createElement(\"span\", \"flatpickr-prev-month\");\n self.prevMonthNav.innerHTML = self.config.prevArrow;\n self.nextMonthNav = createElement(\"span\", \"flatpickr-next-month\");\n self.nextMonthNav.innerHTML = self.config.nextArrow;\n buildMonths();\n Object.defineProperty(self, \"_hidePrevMonthArrow\", {\n get: function () { return self.__hidePrevMonthArrow; },\n set: function (bool) {\n if (self.__hidePrevMonthArrow !== bool) {\n toggleClass(self.prevMonthNav, \"flatpickr-disabled\", bool);\n self.__hidePrevMonthArrow = bool;\n }\n }\n });\n Object.defineProperty(self, \"_hideNextMonthArrow\", {\n get: function () { return self.__hideNextMonthArrow; },\n set: function (bool) {\n if (self.__hideNextMonthArrow !== bool) {\n toggleClass(self.nextMonthNav, \"flatpickr-disabled\", bool);\n self.__hideNextMonthArrow = bool;\n }\n }\n });\n self.currentYearElement = self.yearElements[0];\n updateNavigationCurrentMonth();\n return self.monthNav;\n }\n function buildTime() {\n self.calendarContainer.classList.add(\"hasTime\");\n if (self.config.noCalendar)\n self.calendarContainer.classList.add(\"noCalendar\");\n self.timeContainer = createElement(\"div\", \"flatpickr-time\");\n self.timeContainer.tabIndex = -1;\n var separator = createElement(\"span\", \"flatpickr-time-separator\", \":\");\n var hourInput = createNumberInput(\"flatpickr-hour\", {\n \"aria-label\": self.l10n.hourAriaLabel\n });\n self.hourElement = hourInput.getElementsByTagName(\"input\")[0];\n var minuteInput = createNumberInput(\"flatpickr-minute\", {\n \"aria-label\": self.l10n.minuteAriaLabel\n });\n self.minuteElement = minuteInput.getElementsByTagName(\"input\")[0];\n self.hourElement.tabIndex = self.minuteElement.tabIndex = -1;\n self.hourElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getHours()\n : self.config.time_24hr\n ? self.config.defaultHour\n : military2ampm(self.config.defaultHour));\n self.minuteElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getMinutes()\n : self.config.defaultMinute);\n self.hourElement.setAttribute(\"step\", self.config.hourIncrement.toString());\n self.minuteElement.setAttribute(\"step\", self.config.minuteIncrement.toString());\n self.hourElement.setAttribute(\"min\", self.config.time_24hr ? \"0\" : \"1\");\n self.hourElement.setAttribute(\"max\", self.config.time_24hr ? \"23\" : \"12\");\n self.minuteElement.setAttribute(\"min\", \"0\");\n self.minuteElement.setAttribute(\"max\", \"59\");\n self.timeContainer.appendChild(hourInput);\n self.timeContainer.appendChild(separator);\n self.timeContainer.appendChild(minuteInput);\n if (self.config.time_24hr)\n self.timeContainer.classList.add(\"time24hr\");\n if (self.config.enableSeconds) {\n self.timeContainer.classList.add(\"hasSeconds\");\n var secondInput = createNumberInput(\"flatpickr-second\");\n self.secondElement = secondInput.getElementsByTagName(\"input\")[0];\n self.secondElement.value = pad(self.latestSelectedDateObj\n ? self.latestSelectedDateObj.getSeconds()\n : self.config.defaultSeconds);\n self.secondElement.setAttribute(\"step\", self.minuteElement.getAttribute(\"step\"));\n self.secondElement.setAttribute(\"min\", \"0\");\n self.secondElement.setAttribute(\"max\", \"59\");\n self.timeContainer.appendChild(createElement(\"span\", \"flatpickr-time-separator\", \":\"));\n self.timeContainer.appendChild(secondInput);\n }\n if (!self.config.time_24hr) {\n // add self.amPM if appropriate\n self.amPM = createElement(\"span\", \"flatpickr-am-pm\", self.l10n.amPM[int((self.latestSelectedDateObj\n ? self.hourElement.value\n : self.config.defaultHour) > 11)]);\n self.amPM.title = self.l10n.toggleTitle;\n self.amPM.tabIndex = -1;\n self.timeContainer.appendChild(self.amPM);\n }\n return self.timeContainer;\n }\n function buildWeekdays() {\n if (!self.weekdayContainer)\n self.weekdayContainer = createElement(\"div\", \"flatpickr-weekdays\");\n else\n clearNode(self.weekdayContainer);\n for (var i = self.config.showMonths; i--;) {\n var container = createElement(\"div\", \"flatpickr-weekdaycontainer\");\n self.weekdayContainer.appendChild(container);\n }\n updateWeekdays();\n return self.weekdayContainer;\n }\n function updateWeekdays() {\n if (!self.weekdayContainer) {\n return;\n }\n var firstDayOfWeek = self.l10n.firstDayOfWeek;\n var weekdays = self.l10n.weekdays.shorthand.slice();\n if (firstDayOfWeek > 0 && firstDayOfWeek < weekdays.length) {\n weekdays = weekdays.splice(firstDayOfWeek, weekdays.length).concat(weekdays.splice(0, firstDayOfWeek));\n }\n for (var i = self.config.showMonths; i--;) {\n self.weekdayContainer.children[i].innerHTML = \"\\n <span class='flatpickr-weekday'>\\n \" + weekdays.join(\"</span><span class='flatpickr-weekday'>\") + \"\\n </span>\\n \";\n }\n }\n /* istanbul ignore next */\n function buildWeeks() {\n self.calendarContainer.classList.add(\"hasWeeks\");\n var weekWrapper = createElement(\"div\", \"flatpickr-weekwrapper\");\n weekWrapper.appendChild(createElement(\"span\", \"flatpickr-weekday\", self.l10n.weekAbbreviation));\n var weekNumbers = createElement(\"div\", \"flatpickr-weeks\");\n weekWrapper.appendChild(weekNumbers);\n return {\n weekWrapper: weekWrapper,\n weekNumbers: weekNumbers\n };\n }\n function changeMonth(value, isOffset) {\n if (isOffset === void 0) { isOffset = true; }\n var delta = isOffset ? value : value - self.currentMonth;\n if ((delta < 0 && self._hidePrevMonthArrow === true) ||\n (delta > 0 && self._hideNextMonthArrow === true))\n return;\n self.currentMonth += delta;\n if (self.currentMonth < 0 || self.currentMonth > 11) {\n self.currentYear += self.currentMonth > 11 ? 1 : -1;\n self.currentMonth = (self.currentMonth + 12) % 12;\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n buildDays();\n triggerEvent(\"onMonthChange\");\n updateNavigationCurrentMonth();\n }\n function clear(triggerChangeEvent, toInitial) {\n if (triggerChangeEvent === void 0) { triggerChangeEvent = true; }\n if (toInitial === void 0) { toInitial = true; }\n self.input.value = \"\";\n if (self.altInput !== undefined)\n self.altInput.value = \"\";\n if (self.mobileInput !== undefined)\n self.mobileInput.value = \"\";\n self.selectedDates = [];\n self.latestSelectedDateObj = undefined;\n if (toInitial === true) {\n self.currentYear = self._initialDate.getFullYear();\n self.currentMonth = self._initialDate.getMonth();\n }\n self.showTimeInput = false;\n if (self.config.enableTime === true) {\n setDefaultHours();\n }\n self.redraw();\n if (triggerChangeEvent)\n // triggerChangeEvent is true (default) or an Event\n triggerEvent(\"onChange\");\n }\n function close() {\n self.isOpen = false;\n if (!self.isMobile) {\n if (self.calendarContainer !== undefined) {\n self.calendarContainer.classList.remove(\"open\");\n }\n if (self._input !== undefined) {\n self._input.classList.remove(\"active\");\n }\n }\n triggerEvent(\"onClose\");\n }\n function destroy() {\n if (self.config !== undefined)\n triggerEvent(\"onDestroy\");\n for (var i = self._handlers.length; i--;) {\n var h = self._handlers[i];\n h.element.removeEventListener(h.event, h.handler, h.options);\n }\n self._handlers = [];\n if (self.mobileInput) {\n if (self.mobileInput.parentNode)\n self.mobileInput.parentNode.removeChild(self.mobileInput);\n self.mobileInput = undefined;\n }\n else if (self.calendarContainer && self.calendarContainer.parentNode) {\n if (self.config.static && self.calendarContainer.parentNode) {\n var wrapper = self.calendarContainer.parentNode;\n wrapper.lastChild && wrapper.removeChild(wrapper.lastChild);\n if (wrapper.parentNode) {\n while (wrapper.firstChild)\n wrapper.parentNode.insertBefore(wrapper.firstChild, wrapper);\n wrapper.parentNode.removeChild(wrapper);\n }\n }\n else\n self.calendarContainer.parentNode.removeChild(self.calendarContainer);\n }\n if (self.altInput) {\n self.input.type = \"text\";\n if (self.altInput.parentNode)\n self.altInput.parentNode.removeChild(self.altInput);\n delete self.altInput;\n }\n if (self.input) {\n self.input.type = self.input._type;\n self.input.classList.remove(\"flatpickr-input\");\n self.input.removeAttribute(\"readonly\");\n self.input.value = \"\";\n }\n [\n \"_showTimeInput\",\n \"latestSelectedDateObj\",\n \"_hideNextMonthArrow\",\n \"_hidePrevMonthArrow\",\n \"__hideNextMonthArrow\",\n \"__hidePrevMonthArrow\",\n \"isMobile\",\n \"isOpen\",\n \"selectedDateElem\",\n \"minDateHasTime\",\n \"maxDateHasTime\",\n \"days\",\n \"daysContainer\",\n \"_input\",\n \"_positionElement\",\n \"innerContainer\",\n \"rContainer\",\n \"monthNav\",\n \"todayDateElem\",\n \"calendarContainer\",\n \"weekdayContainer\",\n \"prevMonthNav\",\n \"nextMonthNav\",\n \"monthsDropdownContainer\",\n \"currentMonthElement\",\n \"currentYearElement\",\n \"navigationCurrentMonth\",\n \"selectedDateElem\",\n \"config\",\n ].forEach(function (k) {\n try {\n delete self[k];\n }\n catch (_) { }\n });\n }\n function isCalendarElem(elem) {\n if (self.config.appendTo && self.config.appendTo.contains(elem))\n return true;\n return self.calendarContainer.contains(elem);\n }\n function documentClick(e) {\n if (self.isOpen && !self.config.inline) {\n var eventTarget_1 = getEventTarget(e);\n var isCalendarElement = isCalendarElem(eventTarget_1);\n var isInput = eventTarget_1 === self.input ||\n eventTarget_1 === self.altInput ||\n self.element.contains(eventTarget_1) ||\n // web components\n // e.path is not present in all browsers. circumventing typechecks\n (e.path &&\n e.path.indexOf &&\n (~e.path.indexOf(self.input) ||\n ~e.path.indexOf(self.altInput)));\n var lostFocus = e.type === \"blur\"\n ? isInput &&\n e.relatedTarget &&\n !isCalendarElem(e.relatedTarget)\n : !isInput &&\n !isCalendarElement &&\n !isCalendarElem(e.relatedTarget);\n var isIgnored = !self.config.ignoredFocusElements.some(function (elem) {\n return elem.contains(eventTarget_1);\n });\n if (lostFocus && isIgnored) {\n if (self.timeContainer !== undefined &&\n self.minuteElement !== undefined &&\n self.hourElement !== undefined) {\n updateTime();\n }\n self.close();\n if (self.config.mode === \"range\" && self.selectedDates.length === 1) {\n self.clear(false);\n self.redraw();\n }\n }\n }\n }\n function changeYear(newYear) {\n if (!newYear ||\n (self.config.minDate && newYear < self.config.minDate.getFullYear()) ||\n (self.config.maxDate && newYear > self.config.maxDate.getFullYear()))\n return;\n var newYearNum = newYear, isNewYear = self.currentYear !== newYearNum;\n self.currentYear = newYearNum || self.currentYear;\n if (self.config.maxDate &&\n self.currentYear === self.config.maxDate.getFullYear()) {\n self.currentMonth = Math.min(self.config.maxDate.getMonth(), self.currentMonth);\n }\n else if (self.config.minDate &&\n self.currentYear === self.config.minDate.getFullYear()) {\n self.currentMonth = Math.max(self.config.minDate.getMonth(), self.currentMonth);\n }\n if (isNewYear) {\n self.redraw();\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n }\n function isEnabled(date, timeless) {\n if (timeless === void 0) { timeless = true; }\n var dateToCheck = self.parseDate(date, undefined, timeless); // timeless\n if ((self.config.minDate &&\n dateToCheck &&\n compareDates(dateToCheck, self.config.minDate, timeless !== undefined ? timeless : !self.minDateHasTime) < 0) ||\n (self.config.maxDate &&\n dateToCheck &&\n compareDates(dateToCheck, self.config.maxDate, timeless !== undefined ? timeless : !self.maxDateHasTime) > 0))\n return false;\n if (self.config.enable.length === 0 && self.config.disable.length === 0)\n return true;\n if (dateToCheck === undefined)\n return false;\n var bool = self.config.enable.length > 0, array = bool ? self.config.enable : self.config.disable;\n for (var i = 0, d = void 0; i < array.length; i++) {\n d = array[i];\n if (typeof d === \"function\" &&\n d(dateToCheck) // disabled by function\n )\n return bool;\n else if (d instanceof Date &&\n dateToCheck !== undefined &&\n d.getTime() === dateToCheck.getTime())\n // disabled by date\n return bool;\n else if (typeof d === \"string\" && dateToCheck !== undefined) {\n // disabled by date string\n var parsed = self.parseDate(d, undefined, true);\n return parsed && parsed.getTime() === dateToCheck.getTime()\n ? bool\n : !bool;\n }\n else if (\n // disabled by range\n typeof d === \"object\" &&\n dateToCheck !== undefined &&\n d.from &&\n d.to &&\n dateToCheck.getTime() >= d.from.getTime() &&\n dateToCheck.getTime() <= d.to.getTime())\n return bool;\n }\n return !bool;\n }\n function isInView(elem) {\n if (self.daysContainer !== undefined)\n return (elem.className.indexOf(\"hidden\") === -1 &&\n self.daysContainer.contains(elem));\n return false;\n }\n function onKeyDown(e) {\n // e.key e.keyCode\n // \"Backspace\" 8\n // \"Tab\" 9\n // \"Enter\" 13\n // \"Escape\" (IE \"Esc\") 27\n // \"ArrowLeft\" (IE \"Left\") 37\n // \"ArrowUp\" (IE \"Up\") 38\n // \"ArrowRight\" (IE \"Right\") 39\n // \"ArrowDown\" (IE \"Down\") 40\n // \"Delete\" (IE \"Del\") 46\n var isInput = e.target === self._input;\n var allowInput = self.config.allowInput;\n var allowKeydown = self.isOpen && (!allowInput || !isInput);\n var allowInlineKeydown = self.config.inline && isInput && !allowInput;\n if (e.keyCode === 13 && isInput) {\n if (allowInput) {\n self.setDate(self._input.value, true, e.target === self.altInput\n ? self.config.altFormat\n : self.config.dateFormat);\n return e.target.blur();\n }\n else {\n self.open();\n }\n }\n else if (isCalendarElem(e.target) ||\n allowKeydown ||\n allowInlineKeydown) {\n var isTimeObj = !!self.timeContainer &&\n self.timeContainer.contains(e.target);\n switch (e.keyCode) {\n case 13:\n if (isTimeObj) {\n e.preventDefault();\n updateTime();\n focusAndClose();\n }\n else\n selectDate(e);\n break;\n case 27: // escape\n e.preventDefault();\n focusAndClose();\n break;\n case 8:\n case 46:\n if (isInput && !self.config.allowInput) {\n e.preventDefault();\n self.clear();\n }\n break;\n case 37:\n case 39:\n if (!isTimeObj && !isInput) {\n e.preventDefault();\n if (self.daysContainer !== undefined &&\n (allowInput === false ||\n (document.activeElement && isInView(document.activeElement)))) {\n var delta_1 = e.keyCode === 39 ? 1 : -1;\n if (!e.ctrlKey)\n focusOnDay(undefined, delta_1);\n else {\n e.stopPropagation();\n changeMonth(delta_1);\n focusOnDay(getFirstAvailableDay(1), 0);\n }\n }\n }\n else if (self.hourElement)\n self.hourElement.focus();\n break;\n case 38:\n case 40:\n e.preventDefault();\n var delta = e.keyCode === 40 ? 1 : -1;\n if ((self.daysContainer && e.target.$i !== undefined) ||\n e.target === self.input ||\n e.target === self.altInput) {\n if (e.ctrlKey) {\n e.stopPropagation();\n changeYear(self.currentYear - delta);\n focusOnDay(getFirstAvailableDay(1), 0);\n }\n else if (!isTimeObj)\n focusOnDay(undefined, delta * 7);\n }\n else if (e.target === self.currentYearElement) {\n changeYear(self.currentYear - delta);\n }\n else if (self.config.enableTime) {\n if (!isTimeObj && self.hourElement)\n self.hourElement.focus();\n updateTime(e);\n self._debouncedChange();\n }\n break;\n case 9:\n if (isTimeObj) {\n var elems = [\n self.hourElement,\n self.minuteElement,\n self.secondElement,\n self.amPM,\n ]\n .concat(self.pluginElements)\n .filter(function (x) { return x; });\n var i = elems.indexOf(e.target);\n if (i !== -1) {\n var target = elems[i + (e.shiftKey ? -1 : 1)];\n e.preventDefault();\n (target || self._input).focus();\n }\n }\n else if (!self.config.noCalendar &&\n self.daysContainer &&\n self.daysContainer.contains(e.target) &&\n e.shiftKey) {\n e.preventDefault();\n self._input.focus();\n }\n break;\n default:\n break;\n }\n }\n if (self.amPM !== undefined && e.target === self.amPM) {\n switch (e.key) {\n case self.l10n.amPM[0].charAt(0):\n case self.l10n.amPM[0].charAt(0).toLowerCase():\n self.amPM.textContent = self.l10n.amPM[0];\n setHoursFromInputs();\n updateValue();\n break;\n case self.l10n.amPM[1].charAt(0):\n case self.l10n.amPM[1].charAt(0).toLowerCase():\n self.amPM.textContent = self.l10n.amPM[1];\n setHoursFromInputs();\n updateValue();\n break;\n }\n }\n if (isInput || isCalendarElem(e.target)) {\n triggerEvent(\"onKeyDown\", e);\n }\n }\n function onMouseOver(elem) {\n if (self.selectedDates.length !== 1 ||\n (elem &&\n (!elem.classList.contains(\"flatpickr-day\") ||\n elem.classList.contains(\"flatpickr-disabled\"))))\n return;\n var hoverDate = elem\n ? elem.dateObj.getTime()\n : self.days.firstElementChild.dateObj.getTime(), initialDate = self.parseDate(self.selectedDates[0], undefined, true).getTime(), rangeStartDate = Math.min(hoverDate, self.selectedDates[0].getTime()), rangeEndDate = Math.max(hoverDate, self.selectedDates[0].getTime());\n var containsDisabled = false;\n var minRange = 0, maxRange = 0;\n for (var t = rangeStartDate; t < rangeEndDate; t += duration.DAY) {\n if (!isEnabled(new Date(t), true)) {\n containsDisabled =\n containsDisabled || (t > rangeStartDate && t < rangeEndDate);\n if (t < initialDate && (!minRange || t > minRange))\n minRange = t;\n else if (t > initialDate && (!maxRange || t < maxRange))\n maxRange = t;\n }\n }\n for (var m = 0; m < self.config.showMonths; m++) {\n var month = self.daysContainer.children[m];\n var _loop_1 = function (i, l) {\n var dayElem = month.children[i], date = dayElem.dateObj;\n var timestamp = date.getTime();\n var outOfRange = (minRange > 0 && timestamp < minRange) ||\n (maxRange > 0 && timestamp > maxRange);\n if (outOfRange) {\n dayElem.classList.add(\"notAllowed\");\n [\"inRange\", \"startRange\", \"endRange\"].forEach(function (c) {\n dayElem.classList.remove(c);\n });\n return \"continue\";\n }\n else if (containsDisabled && !outOfRange)\n return \"continue\";\n [\"startRange\", \"inRange\", \"endRange\", \"notAllowed\"].forEach(function (c) {\n dayElem.classList.remove(c);\n });\n if (elem !== undefined) {\n elem.classList.add(hoverDate <= self.selectedDates[0].getTime()\n ? \"startRange\"\n : \"endRange\");\n if (initialDate < hoverDate && timestamp === initialDate)\n dayElem.classList.add(\"startRange\");\n else if (initialDate > hoverDate && timestamp === initialDate)\n dayElem.classList.add(\"endRange\");\n if (timestamp >= minRange &&\n (maxRange === 0 || timestamp <= maxRange) &&\n isBetween(timestamp, initialDate, hoverDate))\n dayElem.classList.add(\"inRange\");\n }\n };\n for (var i = 0, l = month.children.length; i < l; i++) {\n _loop_1(i, l);\n }\n }\n }\n function onResize() {\n if (self.isOpen && !self.config.static && !self.config.inline)\n positionCalendar();\n }\n function setDefaultTime() {\n self.setDate(self.config.minDate !== undefined\n ? new Date(self.config.minDate.getTime())\n : new Date(), true);\n setDefaultHours();\n updateValue();\n }\n function open(e, positionElement) {\n if (positionElement === void 0) { positionElement = self._positionElement; }\n if (self.isMobile === true) {\n if (e) {\n e.preventDefault();\n e.target && e.target.blur();\n }\n if (self.mobileInput !== undefined) {\n self.mobileInput.focus();\n self.mobileInput.click();\n }\n triggerEvent(\"onOpen\");\n return;\n }\n if (self._input.disabled || self.config.inline)\n return;\n var wasOpen = self.isOpen;\n self.isOpen = true;\n if (!wasOpen) {\n self.calendarContainer.classList.add(\"open\");\n self._input.classList.add(\"active\");\n triggerEvent(\"onOpen\");\n positionCalendar(positionElement);\n }\n if (self.config.enableTime === true && self.config.noCalendar === true) {\n if (self.selectedDates.length === 0) {\n setDefaultTime();\n }\n if (self.config.allowInput === false &&\n (e === undefined ||\n !self.timeContainer.contains(e.relatedTarget))) {\n setTimeout(function () { return self.hourElement.select(); }, 50);\n }\n }\n }\n function minMaxDateSetter(type) {\n return function (date) {\n var dateObj = (self.config[\"_\" + type + \"Date\"] = self.parseDate(date, self.config.dateFormat));\n var inverseDateObj = self.config[\"_\" + (type === \"min\" ? \"max\" : \"min\") + \"Date\"];\n if (dateObj !== undefined) {\n self[type === \"min\" ? \"minDateHasTime\" : \"maxDateHasTime\"] =\n dateObj.getHours() > 0 ||\n dateObj.getMinutes() > 0 ||\n dateObj.getSeconds() > 0;\n }\n if (self.selectedDates) {\n self.selectedDates = self.selectedDates.filter(function (d) { return isEnabled(d); });\n if (!self.selectedDates.length && type === \"min\")\n setHoursFromDate(dateObj);\n updateValue();\n }\n if (self.daysContainer) {\n redraw();\n if (dateObj !== undefined)\n self.currentYearElement[type] = dateObj.getFullYear().toString();\n else\n self.currentYearElement.removeAttribute(type);\n self.currentYearElement.disabled =\n !!inverseDateObj &&\n dateObj !== undefined &&\n inverseDateObj.getFullYear() === dateObj.getFullYear();\n }\n };\n }\n function parseConfig() {\n var boolOpts = [\n \"wrap\",\n \"weekNumbers\",\n \"allowInput\",\n \"clickOpens\",\n \"time_24hr\",\n \"enableTime\",\n \"noCalendar\",\n \"altInput\",\n \"shorthandCurrentMonth\",\n \"inline\",\n \"static\",\n \"enableSeconds\",\n \"disableMobile\",\n ];\n var userConfig = __assign({}, instanceConfig, JSON.parse(JSON.stringify(element.dataset || {})));\n var formats = {};\n self.config.parseDate = userConfig.parseDate;\n self.config.formatDate = userConfig.formatDate;\n Object.defineProperty(self.config, \"enable\", {\n get: function () { return self.config._enable; },\n set: function (dates) {\n self.config._enable = parseDateRules(dates);\n }\n });\n Object.defineProperty(self.config, \"disable\", {\n get: function () { return self.config._disable; },\n set: function (dates) {\n self.config._disable = parseDateRules(dates);\n }\n });\n var timeMode = userConfig.mode === \"time\";\n if (!userConfig.dateFormat && (userConfig.enableTime || timeMode)) {\n var defaultDateFormat = flatpickr.defaultConfig.dateFormat || defaults.dateFormat;\n formats.dateFormat =\n userConfig.noCalendar || timeMode\n ? \"H:i\" + (userConfig.enableSeconds ? \":S\" : \"\")\n : defaultDateFormat + \" H:i\" + (userConfig.enableSeconds ? \":S\" : \"\");\n }\n if (userConfig.altInput &&\n (userConfig.enableTime || timeMode) &&\n !userConfig.altFormat) {\n var defaultAltFormat = flatpickr.defaultConfig.altFormat || defaults.altFormat;\n formats.altFormat =\n userConfig.noCalendar || timeMode\n ? \"h:i\" + (userConfig.enableSeconds ? \":S K\" : \" K\")\n : defaultAltFormat + (\" h:i\" + (userConfig.enableSeconds ? \":S\" : \"\") + \" K\");\n }\n if (!userConfig.altInputClass) {\n self.config.altInputClass =\n self.input.className + \" \" + self.config.altInputClass;\n }\n Object.defineProperty(self.config, \"minDate\", {\n get: function () { return self.config._minDate; },\n set: minMaxDateSetter(\"min\")\n });\n Object.defineProperty(self.config, \"maxDate\", {\n get: function () { return self.config._maxDate; },\n set: minMaxDateSetter(\"max\")\n });\n var minMaxTimeSetter = function (type) { return function (val) {\n self.config[type === \"min\" ? \"_minTime\" : \"_maxTime\"] = self.parseDate(val, \"H:i:S\");\n }; };\n Object.defineProperty(self.config, \"minTime\", {\n get: function () { return self.config._minTime; },\n set: minMaxTimeSetter(\"min\")\n });\n Object.defineProperty(self.config, \"maxTime\", {\n get: function () { return self.config._maxTime; },\n set: minMaxTimeSetter(\"max\")\n });\n if (userConfig.mode === \"time\") {\n self.config.noCalendar = true;\n self.config.enableTime = true;\n }\n Object.assign(self.config, formats, userConfig);\n for (var i = 0; i < boolOpts.length; i++)\n self.config[boolOpts[i]] =\n self.config[boolOpts[i]] === true ||\n self.config[boolOpts[i]] === \"true\";\n HOOKS.filter(function (hook) { return self.config[hook] !== undefined; }).forEach(function (hook) {\n self.config[hook] = arrayify(self.config[hook] || []).map(bindToInstance);\n });\n self.isMobile =\n !self.config.disableMobile &&\n !self.config.inline &&\n self.config.mode === \"single\" &&\n !self.config.disable.length &&\n !self.config.enable.length &&\n !self.config.weekNumbers &&\n /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);\n for (var i = 0; i < self.config.plugins.length; i++) {\n var pluginConf = self.config.plugins[i](self) || {};\n for (var key in pluginConf) {\n if (HOOKS.indexOf(key) > -1) {\n self.config[key] = arrayify(pluginConf[key])\n .map(bindToInstance)\n .concat(self.config[key]);\n }\n else if (typeof userConfig[key] === \"undefined\")\n self.config[key] = pluginConf[key];\n }\n }\n triggerEvent(\"onParseConfig\");\n }\n function setupLocale() {\n if (typeof self.config.locale !== \"object\" &&\n typeof flatpickr.l10ns[self.config.locale] === \"undefined\")\n self.config.errorHandler(new Error(\"flatpickr: invalid locale \" + self.config.locale));\n self.l10n = __assign({}, flatpickr.l10ns[\"default\"], (typeof self.config.locale === \"object\"\n ? self.config.locale\n : self.config.locale !== \"default\"\n ? flatpickr.l10ns[self.config.locale]\n : undefined));\n tokenRegex.K = \"(\" + self.l10n.amPM[0] + \"|\" + self.l10n.amPM[1] + \"|\" + self.l10n.amPM[0].toLowerCase() + \"|\" + self.l10n.amPM[1].toLowerCase() + \")\";\n var userConfig = __assign({}, instanceConfig, JSON.parse(JSON.stringify(element.dataset || {})));\n if (userConfig.time_24hr === undefined &&\n flatpickr.defaultConfig.time_24hr === undefined) {\n self.config.time_24hr = self.l10n.time_24hr;\n }\n self.formatDate = createDateFormatter(self);\n self.parseDate = createDateParser({ config: self.config, l10n: self.l10n });\n }\n function positionCalendar(customPositionElement) {\n if (self.calendarContainer === undefined)\n return;\n triggerEvent(\"onPreCalendarPosition\");\n var positionElement = customPositionElement || self._positionElement;\n var calendarHeight = Array.prototype.reduce.call(self.calendarContainer.children, (function (acc, child) { return acc + child.offsetHeight; }), 0), calendarWidth = self.calendarContainer.offsetWidth, configPos = self.config.position.split(\" \"), configPosVertical = configPos[0], configPosHorizontal = configPos.length > 1 ? configPos[1] : null, inputBounds = positionElement.getBoundingClientRect(), distanceFromBottom = window.innerHeight - inputBounds.bottom, showOnTop = configPosVertical === \"above\" ||\n (configPosVertical !== \"below\" &&\n distanceFromBottom < calendarHeight &&\n inputBounds.top > calendarHeight);\n var top = window.pageYOffset +\n inputBounds.top +\n (!showOnTop ? positionElement.offsetHeight + 2 : -calendarHeight - 2);\n toggleClass(self.calendarContainer, \"arrowTop\", !showOnTop);\n toggleClass(self.calendarContainer, \"arrowBottom\", showOnTop);\n if (self.config.inline)\n return;\n var left = window.pageXOffset +\n inputBounds.left -\n (configPosHorizontal != null && configPosHorizontal === \"center\"\n ? (calendarWidth - inputBounds.width) / 2\n : 0);\n var right = window.document.body.offsetWidth - (window.pageXOffset + inputBounds.right);\n var rightMost = left + calendarWidth > window.document.body.offsetWidth;\n var centerMost = right + calendarWidth > window.document.body.offsetWidth;\n toggleClass(self.calendarContainer, \"rightMost\", rightMost);\n if (self.config.static)\n return;\n self.calendarContainer.style.top = top + \"px\";\n if (!rightMost) {\n self.calendarContainer.style.left = left + \"px\";\n self.calendarContainer.style.right = \"auto\";\n }\n else if (!centerMost) {\n self.calendarContainer.style.left = \"auto\";\n self.calendarContainer.style.right = right + \"px\";\n }\n else {\n var doc = document.styleSheets[0];\n // some testing environments don't have css support\n if (doc === undefined)\n return;\n var bodyWidth = window.document.body.offsetWidth;\n var centerLeft = Math.max(0, bodyWidth / 2 - calendarWidth / 2);\n var centerBefore = \".flatpickr-calendar.centerMost:before\";\n var centerAfter = \".flatpickr-calendar.centerMost:after\";\n var centerIndex = doc.cssRules.length;\n var centerStyle = \"{left:\" + inputBounds.left + \"px;right:auto;}\";\n toggleClass(self.calendarContainer, \"rightMost\", false);\n toggleClass(self.calendarContainer, \"centerMost\", true);\n doc.insertRule(centerBefore + \",\" + centerAfter + centerStyle, centerIndex);\n self.calendarContainer.style.left = centerLeft + \"px\";\n self.calendarContainer.style.right = \"auto\";\n }\n }\n function redraw() {\n if (self.config.noCalendar || self.isMobile)\n return;\n updateNavigationCurrentMonth();\n buildDays();\n }\n function focusAndClose() {\n self._input.focus();\n if (window.navigator.userAgent.indexOf(\"MSIE\") !== -1 ||\n navigator.msMaxTouchPoints !== undefined) {\n // hack - bugs in the way IE handles focus keeps the calendar open\n setTimeout(self.close, 0);\n }\n else {\n self.close();\n }\n }\n function selectDate(e) {\n e.preventDefault();\n e.stopPropagation();\n var isSelectable = function (day) {\n return day.classList &&\n day.classList.contains(\"flatpickr-day\") &&\n !day.classList.contains(\"flatpickr-disabled\") &&\n !day.classList.contains(\"notAllowed\");\n };\n var t = findParent(e.target, isSelectable);\n if (t === undefined)\n return;\n var target = t;\n var selectedDate = (self.latestSelectedDateObj = new Date(target.dateObj.getTime()));\n var shouldChangeMonth = (selectedDate.getMonth() < self.currentMonth ||\n selectedDate.getMonth() >\n self.currentMonth + self.config.showMonths - 1) &&\n self.config.mode !== \"range\";\n self.selectedDateElem = target;\n if (self.config.mode === \"single\")\n self.selectedDates = [selectedDate];\n else if (self.config.mode === \"multiple\") {\n var selectedIndex = isDateSelected(selectedDate);\n if (selectedIndex)\n self.selectedDates.splice(parseInt(selectedIndex), 1);\n else\n self.selectedDates.push(selectedDate);\n }\n else if (self.config.mode === \"range\") {\n if (self.selectedDates.length === 2) {\n self.clear(false, false);\n }\n self.latestSelectedDateObj = selectedDate;\n self.selectedDates.push(selectedDate);\n // unless selecting same date twice, sort ascendingly\n if (compareDates(selectedDate, self.selectedDates[0], true) !== 0)\n self.selectedDates.sort(function (a, b) { return a.getTime() - b.getTime(); });\n }\n setHoursFromInputs();\n if (shouldChangeMonth) {\n var isNewYear = self.currentYear !== selectedDate.getFullYear();\n self.currentYear = selectedDate.getFullYear();\n self.currentMonth = selectedDate.getMonth();\n if (isNewYear) {\n triggerEvent(\"onYearChange\");\n buildMonthSwitch();\n }\n triggerEvent(\"onMonthChange\");\n }\n updateNavigationCurrentMonth();\n buildDays();\n updateValue();\n if (self.config.enableTime)\n setTimeout(function () { return (self.showTimeInput = true); }, 50);\n // maintain focus\n if (!shouldChangeMonth &&\n self.config.mode !== \"range\" &&\n self.config.showMonths === 1)\n focusOnDayElem(target);\n else if (self.selectedDateElem !== undefined &&\n self.hourElement === undefined) {\n self.selectedDateElem && self.selectedDateElem.focus();\n }\n if (self.hourElement !== undefined)\n self.hourElement !== undefined && self.hourElement.focus();\n if (self.config.closeOnSelect) {\n var single = self.config.mode === \"single\" && !self.config.enableTime;\n var range = self.config.mode === \"range\" &&\n self.selectedDates.length === 2 &&\n !self.config.enableTime;\n if (single || range) {\n focusAndClose();\n }\n }\n triggerChange();\n }\n var CALLBACKS = {\n locale: [setupLocale, updateWeekdays],\n showMonths: [buildMonths, setCalendarWidth, buildWeekdays],\n minDate: [jumpToDate],\n maxDate: [jumpToDate]\n };\n function set(option, value) {\n if (option !== null && typeof option === \"object\") {\n Object.assign(self.config, option);\n for (var key in option) {\n if (CALLBACKS[key] !== undefined)\n CALLBACKS[key].forEach(function (x) { return x(); });\n }\n }\n else {\n self.config[option] = value;\n if (CALLBACKS[option] !== undefined)\n CALLBACKS[option].forEach(function (x) { return x(); });\n else if (HOOKS.indexOf(option) > -1)\n self.config[option] = arrayify(value);\n }\n self.redraw();\n updateValue(false);\n }\n function setSelectedDate(inputDate, format) {\n var dates = [];\n if (inputDate instanceof Array)\n dates = inputDate.map(function (d) { return self.parseDate(d, format); });\n else if (inputDate instanceof Date || typeof inputDate === \"number\")\n dates = [self.parseDate(inputDate, format)];\n else if (typeof inputDate === \"string\") {\n switch (self.config.mode) {\n case \"single\":\n case \"time\":\n dates = [self.parseDate(inputDate, format)];\n break;\n case \"multiple\":\n dates = inputDate\n .split(self.config.conjunction)\n .map(function (date) { return self.parseDate(date, format); });\n break;\n case \"range\":\n dates = inputDate\n .split(self.l10n.rangeSeparator)\n .map(function (date) { return self.parseDate(date, format); });\n break;\n default:\n break;\n }\n }\n else\n self.config.errorHandler(new Error(\"Invalid date supplied: \" + JSON.stringify(inputDate)));\n self.selectedDates = dates.filter(function (d) { return d instanceof Date && isEnabled(d, false); });\n if (self.config.mode === \"range\")\n self.selectedDates.sort(function (a, b) { return a.getTime() - b.getTime(); });\n }\n function setDate(date, triggerChange, format) {\n if (triggerChange === void 0) { triggerChange = false; }\n if (format === void 0) { format = self.config.dateFormat; }\n if ((date !== 0 && !date) || (date instanceof Array && date.length === 0))\n return self.clear(triggerChange);\n setSelectedDate(date, format);\n self.showTimeInput = self.selectedDates.length > 0;\n self.latestSelectedDateObj =\n self.selectedDates[self.selectedDates.length - 1];\n self.redraw();\n jumpToDate();\n setHoursFromDate();\n if (self.selectedDates.length === 0) {\n self.clear(false);\n }\n updateValue(triggerChange);\n if (triggerChange)\n triggerEvent(\"onChange\");\n }\n function parseDateRules(arr) {\n return arr\n .slice()\n .map(function (rule) {\n if (typeof rule === \"string\" ||\n typeof rule === \"number\" ||\n rule instanceof Date) {\n return self.parseDate(rule, undefined, true);\n }\n else if (rule &&\n typeof rule === \"object\" &&\n rule.from &&\n rule.to)\n return {\n from: self.parseDate(rule.from, undefined),\n to: self.parseDate(rule.to, undefined)\n };\n return rule;\n })\n .filter(function (x) { return x; }); // remove falsy values\n }\n function setupDates() {\n self.selectedDates = [];\n self.now = self.parseDate(self.config.now) || new Date();\n // Workaround IE11 setting placeholder as the input's value\n var preloadedDate = self.config.defaultDate ||\n ((self.input.nodeName === \"INPUT\" ||\n self.input.nodeName === \"TEXTAREA\") &&\n self.input.placeholder &&\n self.input.value === self.input.placeholder\n ? null\n : self.input.value);\n if (preloadedDate)\n setSelectedDate(preloadedDate, self.config.dateFormat);\n self._initialDate =\n self.selectedDates.length > 0\n ? self.selectedDates[0]\n : self.config.minDate &&\n self.config.minDate.getTime() > self.now.getTime()\n ? self.config.minDate\n : self.config.maxDate &&\n self.config.maxDate.getTime() < self.now.getTime()\n ? self.config.maxDate\n : self.now;\n self.currentYear = self._initialDate.getFullYear();\n self.currentMonth = self._initialDate.getMonth();\n if (self.selectedDates.length > 0)\n self.latestSelectedDateObj = self.selectedDates[0];\n if (self.config.minTime !== undefined)\n self.config.minTime = self.parseDate(self.config.minTime, \"H:i\");\n if (self.config.maxTime !== undefined)\n self.config.maxTime = self.parseDate(self.config.maxTime, \"H:i\");\n self.minDateHasTime =\n !!self.config.minDate &&\n (self.config.minDate.getHours() > 0 ||\n self.config.minDate.getMinutes() > 0 ||\n self.config.minDate.getSeconds() > 0);\n self.maxDateHasTime =\n !!self.config.maxDate &&\n (self.config.maxDate.getHours() > 0 ||\n self.config.maxDate.getMinutes() > 0 ||\n self.config.maxDate.getSeconds() > 0);\n Object.defineProperty(self, \"showTimeInput\", {\n get: function () { return self._showTimeInput; },\n set: function (bool) {\n self._showTimeInput = bool;\n if (self.calendarContainer)\n toggleClass(self.calendarContainer, \"showTimeInput\", bool);\n self.isOpen && positionCalendar();\n }\n });\n }\n function setupInputs() {\n self.input = self.config.wrap\n ? element.querySelector(\"[data-input]\")\n : element;\n /* istanbul ignore next */\n if (!self.input) {\n self.config.errorHandler(new Error(\"Invalid input element specified\"));\n return;\n }\n // hack: store previous type to restore it after destroy()\n self.input._type = self.input.type;\n self.input.type = \"text\";\n self.input.classList.add(\"flatpickr-input\");\n self._input = self.input;\n if (self.config.altInput) {\n // replicate self.element\n self.altInput = createElement(self.input.nodeName, self.config.altInputClass);\n self._input = self.altInput;\n self.altInput.placeholder = self.input.placeholder;\n self.altInput.disabled = self.input.disabled;\n self.altInput.required = self.input.required;\n self.altInput.tabIndex = self.input.tabIndex;\n self.altInput.type = \"text\";\n self.input.setAttribute(\"type\", \"hidden\");\n if (!self.config.static && self.input.parentNode)\n self.input.parentNode.insertBefore(self.altInput, self.input.nextSibling);\n }\n if (!self.config.allowInput)\n self._input.setAttribute(\"readonly\", \"readonly\");\n self._positionElement = self.config.positionElement || self._input;\n }\n function setupMobile() {\n var inputType = self.config.enableTime\n ? self.config.noCalendar\n ? \"time\"\n : \"datetime-local\"\n : \"date\";\n self.mobileInput = createElement(\"input\", self.input.className + \" flatpickr-mobile\");\n self.mobileInput.step = self.input.getAttribute(\"step\") || \"any\";\n self.mobileInput.tabIndex = 1;\n self.mobileInput.type = inputType;\n self.mobileInput.disabled = self.input.disabled;\n self.mobileInput.required = self.input.required;\n self.mobileInput.placeholder = self.input.placeholder;\n self.mobileFormatStr =\n inputType === \"datetime-local\"\n ? \"Y-m-d\\\\TH:i:S\"\n : inputType === \"date\"\n ? \"Y-m-d\"\n : \"H:i:S\";\n if (self.selectedDates.length > 0) {\n self.mobileInput.defaultValue = self.mobileInput.value = self.formatDate(self.selectedDates[0], self.mobileFormatStr);\n }\n if (self.config.minDate)\n self.mobileInput.min = self.formatDate(self.config.minDate, \"Y-m-d\");\n if (self.config.maxDate)\n self.mobileInput.max = self.formatDate(self.config.maxDate, \"Y-m-d\");\n self.input.type = \"hidden\";\n if (self.altInput !== undefined)\n self.altInput.type = \"hidden\";\n try {\n if (self.input.parentNode)\n self.input.parentNode.insertBefore(self.mobileInput, self.input.nextSibling);\n }\n catch (_a) { }\n bind(self.mobileInput, \"change\", function (e) {\n self.setDate(e.target.value, false, self.mobileFormatStr);\n triggerEvent(\"onChange\");\n triggerEvent(\"onClose\");\n });\n }\n function toggle(e) {\n if (self.isOpen === true)\n return self.close();\n self.open(e);\n }\n function triggerEvent(event, data) {\n // If the instance has been destroyed already, all hooks have been removed\n if (self.config === undefined)\n return;\n var hooks = self.config[event];\n if (hooks !== undefined && hooks.length > 0) {\n for (var i = 0; hooks[i] && i < hooks.length; i++)\n hooks[i](self.selectedDates, self.input.value, self, data);\n }\n if (event === \"onChange\") {\n self.input.dispatchEvent(createEvent(\"change\"));\n // many front-end frameworks bind to the input event\n self.input.dispatchEvent(createEvent(\"input\"));\n }\n }\n function createEvent(name) {\n var e = document.createEvent(\"Event\");\n e.initEvent(name, true, true);\n return e;\n }\n function isDateSelected(date) {\n for (var i = 0; i < self.selectedDates.length; i++) {\n if (compareDates(self.selectedDates[i], date) === 0)\n return \"\" + i;\n }\n return false;\n }\n function isDateInRange(date) {\n if (self.config.mode !== \"range\" || self.selectedDates.length < 2)\n return false;\n return (compareDates(date, self.selectedDates[0]) >= 0 &&\n compareDates(date, self.selectedDates[1]) <= 0);\n }\n function updateNavigationCurrentMonth() {\n if (self.config.noCalendar || self.isMobile || !self.monthNav)\n return;\n self.yearElements.forEach(function (yearElement, i) {\n var d = new Date(self.currentYear, self.currentMonth, 1);\n d.setMonth(self.currentMonth + i);\n if (self.config.showMonths > 1 ||\n self.config.monthSelectorType === \"static\") {\n self.monthElements[i].textContent =\n monthToStr(d.getMonth(), self.config.shorthandCurrentMonth, self.l10n) + \" \";\n }\n else {\n self.monthsDropdownContainer.value = d.getMonth().toString();\n }\n yearElement.value = d.getFullYear().toString();\n });\n self._hidePrevMonthArrow =\n self.config.minDate !== undefined &&\n (self.currentYear === self.config.minDate.getFullYear()\n ? self.currentMonth <= self.config.minDate.getMonth()\n : self.currentYear < self.config.minDate.getFullYear());\n self._hideNextMonthArrow =\n self.config.maxDate !== undefined &&\n (self.currentYear === self.config.maxDate.getFullYear()\n ? self.currentMonth + 1 > self.config.maxDate.getMonth()\n : self.currentYear > self.config.maxDate.getFullYear());\n }\n function getDateStr(format) {\n return self.selectedDates\n .map(function (dObj) { return self.formatDate(dObj, format); })\n .filter(function (d, i, arr) {\n return self.config.mode !== \"range\" ||\n self.config.enableTime ||\n arr.indexOf(d) === i;\n })\n .join(self.config.mode !== \"range\"\n ? self.config.conjunction\n : self.l10n.rangeSeparator);\n }\n /**\n * Updates the values of inputs associated with the calendar\n */\n function updateValue(triggerChange) {\n if (triggerChange === void 0) { triggerChange = true; }\n if (self.mobileInput !== undefined && self.mobileFormatStr) {\n self.mobileInput.value =\n self.latestSelectedDateObj !== undefined\n ? self.formatDate(self.latestSelectedDateObj, self.mobileFormatStr)\n : \"\";\n }\n self.input.value = getDateStr(self.config.dateFormat);\n if (self.altInput !== undefined) {\n self.altInput.value = getDateStr(self.config.altFormat);\n }\n if (triggerChange !== false)\n triggerEvent(\"onValueUpdate\");\n }\n function onMonthNavClick(e) {\n var isPrevMonth = self.prevMonthNav.contains(e.target);\n var isNextMonth = self.nextMonthNav.contains(e.target);\n if (isPrevMonth || isNextMonth) {\n changeMonth(isPrevMonth ? -1 : 1);\n }\n else if (self.yearElements.indexOf(e.target) >= 0) {\n e.target.select();\n }\n else if (e.target.classList.contains(\"arrowUp\")) {\n self.changeYear(self.currentYear + 1);\n }\n else if (e.target.classList.contains(\"arrowDown\")) {\n self.changeYear(self.currentYear - 1);\n }\n }\n function timeWrapper(e) {\n e.preventDefault();\n var isKeyDown = e.type === \"keydown\", input = e.target;\n if (self.amPM !== undefined && e.target === self.amPM) {\n self.amPM.textContent =\n self.l10n.amPM[int(self.amPM.textContent === self.l10n.amPM[0])];\n }\n var min = parseFloat(input.getAttribute(\"min\")), max = parseFloat(input.getAttribute(\"max\")), step = parseFloat(input.getAttribute(\"step\")), curValue = parseInt(input.value, 10), delta = e.delta ||\n (isKeyDown ? (e.which === 38 ? 1 : -1) : 0);\n var newValue = curValue + step * delta;\n if (typeof input.value !== \"undefined\" && input.value.length === 2) {\n var isHourElem = input === self.hourElement, isMinuteElem = input === self.minuteElement;\n if (newValue < min) {\n newValue =\n max +\n newValue +\n int(!isHourElem) +\n (int(isHourElem) && int(!self.amPM));\n if (isMinuteElem)\n incrementNumInput(undefined, -1, self.hourElement);\n }\n else if (newValue > max) {\n newValue =\n input === self.hourElement ? newValue - max - int(!self.amPM) : min;\n if (isMinuteElem)\n incrementNumInput(undefined, 1, self.hourElement);\n }\n if (self.amPM &&\n isHourElem &&\n (step === 1\n ? newValue + curValue === 23\n : Math.abs(newValue - curValue) > step)) {\n self.amPM.textContent =\n self.l10n.amPM[int(self.amPM.textContent === self.l10n.amPM[0])];\n }\n input.value = pad(newValue);\n }\n }\n init();\n return self;\n }\n /* istanbul ignore next */\n function _flatpickr(nodeList, config) {\n // static list\n var nodes = Array.prototype.slice\n .call(nodeList)\n .filter(function (x) { return x instanceof HTMLElement; });\n var instances = [];\n for (var i = 0; i < nodes.length; i++) {\n var node = nodes[i];\n try {\n if (node.getAttribute(\"data-fp-omit\") !== null)\n continue;\n if (node._flatpickr !== undefined) {\n node._flatpickr.destroy();\n node._flatpickr = undefined;\n }\n node._flatpickr = FlatpickrInstance(node, config || {});\n instances.push(node._flatpickr);\n }\n catch (e) {\n console.error(e);\n }\n }\n return instances.length === 1 ? instances[0] : instances;\n }\n /* istanbul ignore next */\n if (typeof HTMLElement !== \"undefined\" &&\n typeof HTMLCollection !== \"undefined\" &&\n typeof NodeList !== \"undefined\") {\n // browser env\n HTMLCollection.prototype.flatpickr = NodeList.prototype.flatpickr = function (config) {\n return _flatpickr(this, config);\n };\n HTMLElement.prototype.flatpickr = function (config) {\n return _flatpickr([this], config);\n };\n }\n /* istanbul ignore next */\n var flatpickr = function (selector, config) {\n if (typeof selector === \"string\") {\n return _flatpickr(window.document.querySelectorAll(selector), config);\n }\n else if (selector instanceof Node) {\n return _flatpickr([selector], config);\n }\n else {\n return _flatpickr(selector, config);\n }\n };\n /* istanbul ignore next */\n flatpickr.defaultConfig = {};\n flatpickr.l10ns = {\n en: __assign({}, english),\n \"default\": __assign({}, english)\n };\n flatpickr.localize = function (l10n) {\n flatpickr.l10ns[\"default\"] = __assign({}, flatpickr.l10ns[\"default\"], l10n);\n };\n flatpickr.setDefaults = function (config) {\n flatpickr.defaultConfig = __assign({}, flatpickr.defaultConfig, config);\n };\n flatpickr.parseDate = createDateParser({});\n flatpickr.formatDate = createDateFormatter({});\n flatpickr.compareDates = compareDates;\n /* istanbul ignore next */\n if (typeof jQuery !== \"undefined\" && typeof jQuery.fn !== \"undefined\") {\n jQuery.fn.flatpickr = function (config) {\n return _flatpickr(this, config);\n };\n }\n // eslint-disable-next-line @typescript-eslint/camelcase\n Date.prototype.fp_incr = function (days) {\n return new Date(this.getFullYear(), this.getMonth(), this.getDate() + (typeof days === \"string\" ? parseInt(days, 10) : days));\n };\n if (typeof window !== \"undefined\") {\n window.flatpickr = flatpickr;\n }\n\n return flatpickr;\n\n}));\n","(function (global, factory) {\n typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n typeof define === 'function' && define.amd ? define(['exports'], factory) :\n (global = global || self, factory(global.ru = {}));\n}(this, function (exports) { 'use strict';\n\n var fp = typeof window !== \"undefined\" && window.flatpickr !== undefined\n ? window.flatpickr\n : {\n l10ns: {}\n };\n var Russian = {\n weekdays: {\n shorthand: [\"Вс\", \"Пн\", \"Вт\", \"Ср\", \"Чт\", \"Пт\", \"Сб\"],\n longhand: [\n \"Воскресенье\",\n \"Понедельник\",\n \"Вторник\",\n \"Среда\",\n \"Четверг\",\n \"Пятница\",\n \"Суббота\",\n ]\n },\n months: {\n shorthand: [\n \"Янв\",\n \"Фев\",\n \"Март\",\n \"Апр\",\n \"Май\",\n \"Июнь\",\n \"Июль\",\n \"Авг\",\n \"Сен\",\n \"Окт\",\n \"Ноя\",\n \"Дек\",\n ],\n longhand: [\n \"Январь\",\n \"Февраль\",\n \"Март\",\n \"Апрель\",\n \"Май\",\n \"Июнь\",\n \"Июль\",\n \"Август\",\n \"Сентябрь\",\n \"Октябрь\",\n \"Ноябрь\",\n \"Декабрь\",\n ]\n },\n firstDayOfWeek: 1,\n ordinal: function () {\n return \"\";\n },\n rangeSeparator: \" — \",\n weekAbbreviation: \"Нед.\",\n scrollTitle: \"Прокрутите для увеличения\",\n toggleTitle: \"Нажмите для переключения\",\n amPM: [\"ДП\", \"ПП\"],\n yearAriaLabel: \"Год\",\n time_24hr: true\n };\n fp.l10ns.ru = Russian;\n var ru = fp.l10ns;\n\n exports.Russian = Russian;\n exports.default = ru;\n\n Object.defineProperty(exports, '__esModule', { value: true });\n\n}));\n","(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"ClassicEditor\"] = factory();\n\telse\n\t\troot[\"ClassicEditor\"] = factory();\n})(window, function() {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n 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Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 90);\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/ckeditorerror\n */\n\n/**\n * URL to the documentation with error codes.\n */\nexport const DOCUMENTATION_URL =\n\t'https://ckeditor.com/docs/ckeditor5/latest/framework/guides/support/error-codes.html';\n\n/**\n * The CKEditor error class.\n *\n * You should throw `CKEditorError` when:\n *\n * * An unexpected situation occurred and the editor (most probably) will not work properly. Such exception will be handled\n * by the {@link module:watchdog/watchdog~Watchdog watchdog} (if it is integrated),\n * * If the editor is incorrectly integrated or the editor API is used in the wrong way. This way you will give\n * feedback to the developer as soon as possible. Keep in mind that for common integration issues which should not\n * stop editor initialization (like missing upload adapter, wrong name of a toolbar component) we use `console.warn()` with\n * {@link module:utils/ckeditorerror~attachLinkToDocumentation `attachLinkToDocumentation()`}\n * to improve developers experience and let them see the working editor as soon as possible.\n *\n *\t\t/**\n *\t\t * Error thrown when a plugin cannot be loaded due to JavaScript errors, lack of plugins with a given name, etc.\n *\t\t *\n *\t\t * @error plugin-load\n *\t\t * @param pluginName The name of the plugin that could not be loaded.\n *\t\t * @param moduleName The name of the module which tried to load this plugin.\n *\t\t * /\n *\t\tthrow new CKEditorError( 'plugin-load: It was not possible to load the \"{$pluginName}\" plugin in module \"{$moduleName}', {\n *\t\t\tpluginName: 'foo',\n *\t\t\tmoduleName: 'bar'\n *\t\t} );\n *\n * @extends Error\n */\nexport default class CKEditorError extends Error {\n\t/**\n\t * Creates an instance of the CKEditorError class.\n\t *\n\t * @param {String} message The error message in an `error-name: Error message.` format.\n\t * During the minification process the \"Error message\" part will be removed to limit the code size\n\t * and a link to this error documentation will be added to the `message`.\n\t * @param {Object|null} context A context of the error by which the {@link module:watchdog/watchdog~Watchdog watchdog}\n\t * is able to determine which editor crashed. It should be an editor instance or a property connected to it. It can be also\n\t * a `null` value if the editor should not be restarted in case of the error (e.g. during the editor initialization).\n\t * The error context should be checked using the `areConnectedThroughProperties( editor, context )` utility\n\t * to check if the object works as the context.\n\t * @param {Object} [data] Additional data describing the error. A stringified version of this object\n\t * will be appended to the error message, so the data are quickly visible in the console. The original\n\t * data object will also be later available under the {@link #data} property.\n\t */\n\tconstructor( message, context, data ) {\n\t\tmessage = attachLinkToDocumentation( message );\n\n\t\tif ( data ) {\n\t\t\tmessage += ' ' + JSON.stringify( data );\n\t\t}\n\n\t\tsuper( message );\n\n\t\t/**\n\t\t * @type {String}\n\t\t */\n\t\tthis.name = 'CKEditorError';\n\n\t\t/**\n\t\t * A context of the error by which the Watchdog is able to determine which editor crashed.\n\t\t *\n\t\t * @type {Object|null}\n\t\t */\n\t\tthis.context = context;\n\n\t\t/**\n\t\t * The additional error data passed to the constructor. Undefined if none was passed.\n\t\t *\n\t\t * @type {Object|undefined}\n\t\t */\n\t\tthis.data = data;\n\t}\n\n\t/**\n\t * Checks if the error is of the `CKEditorError` type.\n\t */\n\tis( type ) {\n\t\treturn type === 'CKEditorError';\n\t}\n\n\t/**\n\t * A utility that ensures the the thrown error is a {@link module:utils/ckeditorerror~CKEditorError} one.\n\t * It is useful when combined with the {@link module:watchdog/watchdog~Watchdog} feature, which can restart the editor in case\n\t * of a {@link module:utils/ckeditorerror~CKEditorError} error.\n\t *\n\t * @param {Error} err An error.\n\t * @param {Object} context An object connected through properties with the editor instance. This context will be used\n\t * by the watchdog to verify which editor should be restarted.\n\t */\n\tstatic rethrowUnexpectedError( err, context ) {\n\t\tif ( err.is && err.is( 'CKEditorError' ) ) {\n\t\t\tthrow err;\n\t\t}\n\n\t\t/**\n\t\t * An unexpected error occurred inside the CKEditor 5 codebase. This error will look like the original one\n\t\t * to make the debugging easier.\n\t\t *\n\t\t * This error is only useful when the editor is initialized using the {@link module:watchdog/watchdog~Watchdog} feature.\n\t\t * In case of such error (or any {@link module:utils/ckeditorerror~CKEditorError} error) the watchdog should restart the editor.\n\t\t *\n\t\t * @error unexpected-error\n\t\t */\n\t\tconst error = new CKEditorError( err.message, context );\n\n\t\t// Restore the original stack trace to make the error look like the original one.\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/5595 for more details.\n\t\terror.stack = err.stack;\n\n\t\tthrow error;\n\t}\n}\n\n/**\n * Attaches the link to the documentation at the end of the error message. Use whenever you log a warning or error on the\n * console. It is also used by {@link module:utils/ckeditorerror~CKEditorError}.\n *\n *\t\t /**\n *\t\t * There was a problem processing the configuration of the toolbar. The item with the given\n *\t\t * name does not exist so it was omitted when rendering the toolbar.\n *\t\t *\n *\t\t * @error toolbarview-item-unavailable\n *\t\t * @param {String} name The name of the component.\n *\t\t * /\n *\t\t console.warn( attachLinkToDocumentation(\n *\t\t \t'toolbarview-item-unavailable: The requested toolbar item is unavailable.' ), { name } );\n *\n * @param {String} message Message to be logged.\n * @returns {String}\n */\nexport function attachLinkToDocumentation( message ) {\n\tconst matchedErrorName = message.match( /^([^:]+):/ );\n\n\tif ( !matchedErrorName ) {\n\t\treturn message;\n\t}\n\n\treturn message + ` Read more: ${ DOCUMENTATION_URL }#error-${ matchedErrorName[ 1 ] }\\n`;\n}\n","\"use strict\";\n\nvar stylesInDom = {};\n\nvar isOldIE = function isOldIE() {\n var memo;\n return function memorize() {\n if (typeof memo === 'undefined') {\n // Test for IE <= 9 as proposed by Browserhacks\n // @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805\n // Tests for existence of standard globals is to allow style-loader\n // to operate correctly into non-standard environments\n // @see https://github.com/webpack-contrib/style-loader/issues/177\n memo = Boolean(window && document && document.all && !window.atob);\n }\n\n return memo;\n };\n}();\n\nvar getTarget = function getTarget() {\n var memo = {};\n return function memorize(target) {\n if (typeof memo[target] === 'undefined') {\n var styleTarget = document.querySelector(target); // Special case to return head of iframe instead of iframe itself\n\n if (window.HTMLIFrameElement && styleTarget instanceof window.HTMLIFrameElement) {\n try {\n // This will throw an exception if access to iframe is blocked\n // due to cross-origin restrictions\n styleTarget = styleTarget.contentDocument.head;\n } catch (e) {\n // istanbul ignore next\n styleTarget = null;\n }\n }\n\n memo[target] = styleTarget;\n }\n\n return memo[target];\n };\n}();\n\nfunction listToStyles(list, options) {\n var styles = [];\n var newStyles = {};\n\n for (var i = 0; i < list.length; i++) {\n var item = list[i];\n var id = options.base ? item[0] + options.base : item[0];\n var css = item[1];\n var media = item[2];\n var sourceMap = item[3];\n var part = {\n css: css,\n media: media,\n sourceMap: sourceMap\n };\n\n if (!newStyles[id]) {\n styles.push(newStyles[id] = {\n id: id,\n parts: [part]\n });\n } else {\n newStyles[id].parts.push(part);\n }\n }\n\n return styles;\n}\n\nfunction addStylesToDom(styles, options) {\n for (var i = 0; i < styles.length; i++) {\n var item = styles[i];\n var domStyle = stylesInDom[item.id];\n var j = 0;\n\n if (domStyle) {\n domStyle.refs++;\n\n for (; j < domStyle.parts.length; j++) {\n domStyle.parts[j](item.parts[j]);\n }\n\n for (; j < item.parts.length; j++) {\n domStyle.parts.push(addStyle(item.parts[j], options));\n }\n } else {\n var parts = [];\n\n for (; j < item.parts.length; j++) {\n parts.push(addStyle(item.parts[j], options));\n }\n\n stylesInDom[item.id] = {\n id: item.id,\n refs: 1,\n parts: parts\n };\n }\n }\n}\n\nfunction insertStyleElement(options) {\n var style = document.createElement('style');\n\n if (typeof options.attributes.nonce === 'undefined') {\n var nonce = typeof __webpack_nonce__ !== 'undefined' ? __webpack_nonce__ : null;\n\n if (nonce) {\n options.attributes.nonce = nonce;\n }\n }\n\n Object.keys(options.attributes).forEach(function (key) {\n style.setAttribute(key, options.attributes[key]);\n });\n\n if (typeof options.insert === 'function') {\n options.insert(style);\n } else {\n var target = getTarget(options.insert || 'head');\n\n if (!target) {\n throw new Error(\"Couldn't find a style target. This probably means that the value for the 'insert' parameter is invalid.\");\n }\n\n target.appendChild(style);\n }\n\n return style;\n}\n\nfunction removeStyleElement(style) {\n // istanbul ignore if\n if (style.parentNode === null) {\n return false;\n }\n\n style.parentNode.removeChild(style);\n}\n/* istanbul ignore next */\n\n\nvar replaceText = function replaceText() {\n var textStore = [];\n return function replace(index, replacement) {\n textStore[index] = replacement;\n return textStore.filter(Boolean).join('\\n');\n };\n}();\n\nfunction applyToSingletonTag(style, index, remove, obj) {\n var css = remove ? '' : obj.css; // For old IE\n\n /* istanbul ignore if */\n\n if (style.styleSheet) {\n style.styleSheet.cssText = replaceText(index, css);\n } else {\n var cssNode = document.createTextNode(css);\n var childNodes = style.childNodes;\n\n if (childNodes[index]) {\n style.removeChild(childNodes[index]);\n }\n\n if (childNodes.length) {\n style.insertBefore(cssNode, childNodes[index]);\n } else {\n style.appendChild(cssNode);\n }\n }\n}\n\nfunction applyToTag(style, options, obj) {\n var css = obj.css;\n var media = obj.media;\n var sourceMap = obj.sourceMap;\n\n if (media) {\n style.setAttribute('media', media);\n }\n\n if (sourceMap && btoa) {\n css += \"\\n/*# sourceMappingURL=data:application/json;base64,\".concat(btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap)))), \" */\");\n } // For old IE\n\n /* istanbul ignore if */\n\n\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n while (style.firstChild) {\n style.removeChild(style.firstChild);\n }\n\n style.appendChild(document.createTextNode(css));\n }\n}\n\nvar singleton = null;\nvar singletonCounter = 0;\n\nfunction addStyle(obj, options) {\n var style;\n var update;\n var remove;\n\n if (options.singleton) {\n var styleIndex = singletonCounter++;\n style = singleton || (singleton = insertStyleElement(options));\n update = applyToSingletonTag.bind(null, style, styleIndex, false);\n remove = applyToSingletonTag.bind(null, style, styleIndex, true);\n } else {\n style = insertStyleElement(options);\n update = applyToTag.bind(null, style, options);\n\n remove = function remove() {\n removeStyleElement(style);\n };\n }\n\n update(obj);\n return function updateStyle(newObj) {\n if (newObj) {\n if (newObj.css === obj.css && newObj.media === obj.media && newObj.sourceMap === obj.sourceMap) {\n return;\n }\n\n update(obj = newObj);\n } else {\n remove();\n }\n };\n}\n\nmodule.exports = function (list, options) {\n options = options || {};\n options.attributes = typeof options.attributes === 'object' ? options.attributes : {}; // Force single-tag solution on IE6-9, which has a hard limit on the # of <style>\n // tags it will allow on a page\n\n if (!options.singleton && typeof options.singleton !== 'boolean') {\n options.singleton = isOldIE();\n }\n\n var styles = listToStyles(list, options);\n addStylesToDom(styles, options);\n return function update(newList) {\n var mayRemove = [];\n\n for (var i = 0; i < styles.length; i++) {\n var item = styles[i];\n var domStyle = stylesInDom[item.id];\n\n if (domStyle) {\n domStyle.refs--;\n mayRemove.push(domStyle);\n }\n }\n\n if (newList) {\n var newStyles = listToStyles(newList, options);\n addStylesToDom(newStyles, options);\n }\n\n for (var _i = 0; _i < mayRemove.length; _i++) {\n var _domStyle = mayRemove[_i];\n\n if (_domStyle.refs === 0) {\n for (var j = 0; j < _domStyle.parts.length; j++) {\n _domStyle.parts[j]();\n }\n\n delete stylesInDom[_domStyle.id];\n }\n }\n };\n};","import freeGlobal from './_freeGlobal.js';\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\nexport default root;\n","import freeGlobal from './_freeGlobal.js';\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Detect free variable `process` from Node.js. */\nvar freeProcess = moduleExports && freeGlobal.process;\n\n/** Used to access faster Node.js helpers. */\nvar nodeUtil = (function() {\n try {\n // Use `util.types` for Node.js 10+.\n var types = freeModule && freeModule.require && freeModule.require('util').types;\n\n if (types) {\n return types;\n }\n\n // Legacy `process.binding('util')` for Node.js < 10.\n return freeProcess && freeProcess.binding && freeProcess.binding('util');\n } catch (e) {}\n}());\n\nexport default nodeUtil;\n","import root from './_root.js';\nimport stubFalse from './stubFalse.js';\n\n/** Detect free variable `exports`. */\nvar freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;\n\n/** Detect free variable `module`. */\nvar freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;\n\n/** Detect the popular CommonJS extension `module.exports`. */\nvar moduleExports = freeModule && freeModule.exports === freeExports;\n\n/** Built-in value references. */\nvar Buffer = moduleExports ? root.Buffer : undefined;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;\n\n/**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\nvar isBuffer = nativeIsBuffer || stubFalse;\n\nexport default isBuffer;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/version\n */\n\n/* globals window, global */\n\nimport CKEditorError from './ckeditorerror';\n\nconst version = '16.0.0';\n\n/* istanbul ignore next */\nconst windowOrGlobal = typeof window === 'object' ? window : global;\n\n/* istanbul ignore next */\nif ( windowOrGlobal.CKEDITOR_VERSION ) {\n\t/**\n\t * This error is thrown when due to a mistake in how CKEditor 5 was installed or initialized, some\n\t * of its modules were duplicated (evaluated and executed twice). Module duplication leads to inevitable runtime\n\t * errors.\n\t *\n\t * There are many situations in which some modules can be loaded twice. In the worst case scenario,\n\t * you may need to check your project for each of these issues and fix them all.\n\t *\n\t * # Trying to add a plugin to an existing build\n\t *\n\t * If you import an existing CKEditor 5 build and a plugin like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-build-classic';\n\t *\t\timport Highlight from '@ckeditor/ckeditor5-highlight/src/highlight';\n\t *\n\t * Then your project loads some CKEditor 5 packages twice. How does it happen?\n\t *\n\t * The build package contains a file which is already compiled with webpack. This means\n\t * that it contains all the necessary code from e.g. `@ckeditor/ckeditor5-engine` and `@ckeditor/ckeditor5-utils`.\n\t *\n\t * However, the `Highlight` plugin imports some of the modules from these packages, too. If you ask webpack to\n\t * build such a project, you will end up with the modules being included (and run) twice — first, because they are\n\t * included inside the build package, and second, because they are required by the `Highlight` plugin.\n\t *\n\t * Therefore, **you must never add plugins to an existing build** unless your plugin has no dependencies.\n\t *\n\t * Adding plugins to a build is done by taking the source version of this build (so, before it was built with webpack)\n\t * and adding plugins there. In this situation, webpack will know that it only needs to load each plugin once.\n\t *\n\t * Read more in the {@glink builds/guides/integration/installing-plugins \"Installing plugins\"} guide.\n\t *\n\t * # Confused an editor build with an editor implementation\n\t *\n\t * This scenario is very similar to the previous one, but has a different origin.\n\t *\n\t * Let's assume that you wanted to use CKEditor 5 from source, as explained in the\n\t * {@glink builds/guides/integration/advanced-setup#scenario-2-building-from-source \"Building from source\"} section\n\t * or in the {@glink framework/guides/quick-start \"Quick start\"} guide of CKEditor 5 Framework.\n\t *\n\t * The correct way to do so is to import an editor and plugins and run them together like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';\n\t *\t\timport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\n\t *\t\timport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\t *\t\timport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\n\t *\t\timport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ), {\n\t *\t\t\t\tplugins: [ Essentials, Paragraph, Bold, Italic ],\n\t *\t\t\t\ttoolbar: [ 'bold', 'italic' ]\n\t *\t\t\t} )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( error => {\n\t *\t\t\t\tconsole.error( error.stack );\n\t *\t\t\t} );\n\t *\n\t * However, you might have mistakenly imported a build instead of the source `ClassicEditor`. In this case\n\t * your imports will look like this:\n\t *\n\t *\t\timport ClassicEditor from '@ckeditor/ckeditor5-build-classic';\n\t *\t\timport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\n\t *\t\timport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\t *\t\timport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\n\t *\t\timport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\n\t *\n\t * This creates the same situation as in the previous section because you use a build together with source plugins.\n\t *\n\t * Remember: `@ckeditor/ckeditor5-build-*` packages contain editor builds and `@ckeditor/ckeditor5-editor-*` contain source editors.\n\t *\n\t * # Loading two or more builds on one page\n\t *\n\t * If you use CKEditor 5 builds, you might have loaded two (or more) `ckeditor.js` files on one web page.\n\t * Check your web page for duplicated `<script>` elements or make sure your page builder/bundler includes CKEditor only once.\n\t *\n\t * If you want to use two different types of editors at once, see the\n\t * {@glink builds/guides/integration/advanced-setup#scenario-3-using-two-different-editors \"Using two different editors\"}\n\t * section.\n\t *\n\t * # Using outdated packages\n\t *\n\t * Building CKEditor 5 from source requires using multiple npm packages. These packages have their dependencies\n\t * to other packages. If you use the latest version of, for example, `@ckeditor/ckeditor5-editor-classic` with\n\t * an outdated version of `@ckeditor/ckeditor5-image`, npm or yarn will need to install two different versions of\n\t * `@ckeditor/ckeditor5-core` because `@ckeditor/ckeditor5-editor-classic` and `@ckeditor/ckeditor5-image` may require\n\t * different versions of the core package.\n\t *\n\t * The solution to this issue is to update all packages to their latest version. We recommend\n\t * using tools like [`node-check-updates`](https://www.npmjs.com/package/npm-check-updates) which simplify this process.\n\t *\n\t * # Conflicting version of dependencies\n\t *\n\t * This is a special case of the previous scenario. If you use CKEditor 5 with some third-party plugins,\n\t * it may happen that even if you use the latest versions of the official packages and the latest version of\n\t * these third-party packages, there will be a conflict between some of their dependencies.\n\t *\n\t * Such a problem can be resolved by either downgrading CKEditor 5 packages (which we do not recommend) or\n\t * asking the author of the third-party package to upgrade its depdendencies (or forking their project and doing this yourself).\n\t *\n\t * # Packages were duplicated in `node_modules`\n\t *\n\t * In some situations, especially when calling `npm install` multiple times, it may happen\n\t * that npm will not correctly \"deduplicate\" packages.\n\t *\n\t * Normally, npm deduplicates all packages so, for example, `@ckeditor/ckeditor5-core` is installed only once in `node_modules/`.\n\t * However, it is known to fail to do so from time to time.\n\t *\n\t * We recommend checking if any of the steps listed below help:\n\t *\n\t * * `rm -rf node_modules && npm install` to make sure you have a clean `node_modules/` directory. 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0 0 3px;--ck-focus-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-outer-shadow);--ck-focus-disabled-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-disabled-shadow);--ck-focus-error-outer-shadow:var(--ck-focus-outer-shadow-geometry) var(--ck-color-focus-error-shadow);--ck-focus-ring:1px solid var(--ck-color-focus-border);--ck-font-size-base:13px;--ck-line-height-base:1.84615;--ck-font-face:Helvetica,Arial,Tahoma,Verdana,Sans-Serif;--ck-font-size-tiny:0.7em;--ck-font-size-small:0.75em;--ck-font-size-normal:1em;--ck-font-size-big:1.4em;--ck-font-size-large:1.8em;--ck-ui-component-min-height:2.3em}.ck.ck-reset,.ck.ck-reset_all,.ck.ck-reset_all *{margin:0;padding:0;border:0;background:transparent;text-decoration:none;vertical-align:middle;transition:none;word-wrap:break-word}.ck.ck-reset_all,.ck.ck-reset_all *{border-collapse:collapse;font:normal normal normal var(--ck-font-size-base)/var(--ck-line-height-base) var(--ck-font-face);color:var(--ck-color-text);text-align:left;white-space:nowrap;cursor:auto;float:none}.ck.ck-reset_all .ck-rtl *{text-align:right}.ck.ck-reset_all iframe{vertical-align:inherit}.ck.ck-reset_all textarea{white-space:pre-wrap}.ck.ck-reset_all input[type=password],.ck.ck-reset_all input[type=text],.ck.ck-reset_all textarea{cursor:text}.ck.ck-reset_all input[type=password][disabled],.ck.ck-reset_all input[type=text][disabled],.ck.ck-reset_all textarea[disabled]{cursor:default}.ck.ck-reset_all fieldset{padding:10px;border:2px groove #dfdee3}.ck.ck-reset_all button::-moz-focus-inner{padding:0;border:0}.ck[dir=rtl],.ck[dir=rtl] .ck{text-align:right}:root{--ck-border-radius:2px;--ck-inner-shadow:2px 2px 3px var(--ck-color-shadow-inner) inset;--ck-drop-shadow:0 1px 2px 1px var(--ck-color-shadow-drop);--ck-drop-shadow-active:0 3px 6px 1px var(--ck-color-shadow-drop-active);--ck-spacing-unit:0.6em;--ck-spacing-large:calc(var(--ck-spacing-unit)*1.5);--ck-spacing-standard:var(--ck-spacing-unit);--ck-spacing-medium:calc(var(--ck-spacing-unit)*0.8);--ck-spacing-small:calc(var(--ck-spacing-unit)*0.5);--ck-spacing-tiny:calc(var(--ck-spacing-unit)*0.3);--ck-spacing-extra-tiny:calc(var(--ck-spacing-unit)*0.16)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./editorui.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor__editable:not(.ck-editor__nested-editable){border-radius:0}.ck-rounded-corners .ck.ck-editor__editable:not(.ck-editor__nested-editable),.ck.ck-editor__editable:not(.ck-editor__nested-editable).ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-editor__editable:not(.ck-editor__nested-editable).ck-focused{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-inner-shadow),0 0}.ck.ck-editor__editable_inline{overflow:auto;padding:0 var(--ck-spacing-standard);border:1px solid transparent}.ck.ck-editor__editable_inline[dir=ltr]{text-align:left}.ck.ck-editor__editable_inline[dir=rtl]{text-align:right}.ck.ck-editor__editable_inline>:first-child{margin-top:var(--ck-spacing-large)}.ck.ck-editor__editable_inline>:last-child{margin-bottom:var(--ck-spacing-large)}.ck.ck-balloon-panel.ck-toolbar-container[class*=arrow_n]:after{border-bottom-color:var(--ck-color-base-foreground)}.ck.ck-balloon-panel.ck-toolbar-container[class*=arrow_s]:after{border-top-color:var(--ck-color-base-foreground)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./label.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-label{display:block}.ck.ck-voice-label{display:none}.ck.ck-label{font-weight:700}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./stickypanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-sticky-panel .ck-sticky-panel__content_sticky{z-index:var(--ck-z-modal);position:fixed;top:0}.ck.ck-sticky-panel .ck-sticky-panel__content_sticky_bottom-limit{top:auto;position:absolute}.ck.ck-sticky-panel .ck-sticky-panel__content_sticky{box-shadow:var(--ck-drop-shadow),0 0;border-width:0 1px 1px;border-top-left-radius:0;border-top-right-radius:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./dropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-dropdown{display:inline-block;position:relative}.ck.ck-dropdown .ck-dropdown__arrow{pointer-events:none;z-index:var(--ck-z-default)}.ck.ck-dropdown .ck-button.ck-dropdown__button{width:100%}.ck.ck-dropdown .ck-button.ck-dropdown__button.ck-on .ck-tooltip{display:none}.ck.ck-dropdown .ck-dropdown__panel{-webkit-backface-visibility:hidden;display:none;z-index:var(--ck-z-modal);position:absolute}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel-visible{display:inline-block}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_ne,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_nw{bottom:100%}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_se,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_sw{top:100%;bottom:auto}.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_ne,.ck.ck-dropdown .ck-dropdown__panel.ck-dropdown__panel_se{left:0}.ck.ck-dropdown 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.ck-button.ck-dropdown__button.ck-disabled .ck-button__label{opacity:var(--ck-disabled-opacity)}.ck.ck-dropdown .ck-button.ck-dropdown__button.ck-on{border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-dropdown__panel{box-shadow:var(--ck-drop-shadow),0 0;border-radius:0}.ck-rounded-corners .ck.ck-dropdown__panel,.ck.ck-dropdown__panel.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0}.ck.ck-dropdown__panel{background:var(--ck-color-dropdown-panel-background);border:1px solid var(--ck-color-dropdown-panel-border);bottom:0;min-width:100%}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./icon.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-icon{vertical-align:middle}:root{--ck-icon-size:calc(var(--ck-line-height-base)*var(--ck-font-size-normal))}.ck.ck-icon{width:var(--ck-icon-size);height:var(--ck-icon-size);font-size:.8333350694em;will-change:transform}.ck.ck-icon,.ck.ck-icon *{color:inherit;cursor:inherit}.ck.ck-icon :not([fill]){fill:currentColor}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./tooltip.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-tooltip,.ck.ck-tooltip .ck-tooltip__text:after{position:absolute;pointer-events:none;-webkit-backface-visibility:hidden}.ck.ck-tooltip{visibility:hidden;opacity:0;display:none;z-index:var(--ck-z-modal)}.ck.ck-tooltip .ck-tooltip__text{display:inline-block}.ck.ck-tooltip .ck-tooltip__text:after{content:\\\"\\\";width:0;height:0}:root{--ck-tooltip-arrow-size:5px}.ck.ck-tooltip{left:50%;top:0;transition:opacity .2s ease-in-out .2s}.ck.ck-tooltip .ck-tooltip__text{border-radius:0}.ck-rounded-corners .ck.ck-tooltip .ck-tooltip__text,.ck.ck-tooltip .ck-tooltip__text.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-tooltip .ck-tooltip__text{font-size:.9em;line-height:1.5;color:var(--ck-color-tooltip-text);padding:var(--ck-spacing-small) var(--ck-spacing-medium);background:var(--ck-color-tooltip-background);position:relative;left:-50%}.ck.ck-tooltip .ck-tooltip__text:after{transition:opacity .2s ease-in-out .2s;border-style:solid;left:50%}.ck.ck-tooltip.ck-tooltip_s{bottom:calc(-1*var(--ck-tooltip-arrow-size));transform:translateY(100%)}.ck.ck-tooltip.ck-tooltip_s .ck-tooltip__text:after{top:calc(-1*var(--ck-tooltip-arrow-size));transform:translateX(-50%);border-left-color:transparent;border-bottom-color:var(--ck-color-tooltip-background);border-right-color:transparent;border-top-color:transparent;border-left-width:var(--ck-tooltip-arrow-size);border-bottom-width:var(--ck-tooltip-arrow-size);border-right-width:var(--ck-tooltip-arrow-size);border-top-width:0}.ck.ck-tooltip.ck-tooltip_n{top:calc(-1*var(--ck-tooltip-arrow-size));transform:translateY(-100%)}.ck.ck-tooltip.ck-tooltip_n .ck-tooltip__text:after{bottom:calc(-1*var(--ck-tooltip-arrow-size));transform:translateX(-50%);border-left-color:transparent;border-bottom-color:transparent;border-right-color:transparent;border-top-color:var(--ck-color-tooltip-background);border-left-width:var(--ck-tooltip-arrow-size);border-bottom-width:0;border-right-width:var(--ck-tooltip-arrow-size);border-top-width:var(--ck-tooltip-arrow-size)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./button.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-button,a.ck.ck-button{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none}.ck.ck-button .ck-tooltip,a.ck.ck-button .ck-tooltip{display:block}@media (hover:none){.ck.ck-button .ck-tooltip,a.ck.ck-button .ck-tooltip{display:none}}.ck.ck-button,a.ck.ck-button{position:relative;display:inline-flex;align-items:center;justify-content:left}.ck.ck-button .ck-button__label,a.ck.ck-button .ck-button__label{display:none}.ck.ck-button.ck-button_with-text .ck-button__label,a.ck.ck-button.ck-button_with-text .ck-button__label{display:inline-block}.ck.ck-button:not(.ck-button_with-text),a.ck.ck-button:not(.ck-button_with-text){justify-content:center}.ck.ck-button:hover .ck-tooltip,a.ck.ck-button:hover .ck-tooltip{visibility:visible;opacity:1}.ck.ck-button:focus:not(:hover) .ck-tooltip,a.ck.ck-button:focus:not(:hover) .ck-tooltip{display:none}.ck.ck-button,a.ck.ck-button{background:var(--ck-color-button-default-background)}.ck.ck-button:not(.ck-disabled):hover,a.ck.ck-button:not(.ck-disabled):hover{background:var(--ck-color-button-default-hover-background)}.ck.ck-button:not(.ck-disabled):active,a.ck.ck-button:not(.ck-disabled):active{background:var(--ck-color-button-default-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-default-active-shadow)}.ck.ck-button.ck-disabled,a.ck.ck-button.ck-disabled{background:var(--ck-color-button-default-disabled-background)}.ck.ck-button,a.ck.ck-button{border-radius:0}.ck-rounded-corners .ck.ck-button,.ck-rounded-corners a.ck.ck-button,.ck.ck-button.ck-rounded-corners,a.ck.ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-button,a.ck.ck-button{white-space:nowrap;cursor:default;vertical-align:middle;padding:var(--ck-spacing-tiny);text-align:center;min-width:var(--ck-ui-component-min-height);min-height:var(--ck-ui-component-min-height);line-height:1;font-size:inherit;border:1px solid transparent;transition:box-shadow .2s ease-in-out,border .2s ease-in-out;-webkit-appearance:none}.ck.ck-button:active,.ck.ck-button:focus,a.ck.ck-button:active,a.ck.ck-button:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-focus-outer-shadow),0 0}.ck.ck-button .ck-button__icon use,.ck.ck-button .ck-button__icon use *,a.ck.ck-button .ck-button__icon use,a.ck.ck-button .ck-button__icon use *{color:inherit}.ck.ck-button .ck-button__label,a.ck.ck-button .ck-button__label{font-size:inherit;font-weight:inherit;color:inherit;cursor:inherit;vertical-align:middle}[dir=ltr] .ck.ck-button .ck-button__label,[dir=ltr] a.ck.ck-button .ck-button__label{text-align:left}[dir=rtl] .ck.ck-button .ck-button__label,[dir=rtl] a.ck.ck-button .ck-button__label{text-align:right}.ck.ck-button .ck-button__keystroke,a.ck.ck-button .ck-button__keystroke{color:inherit}[dir=ltr] .ck.ck-button .ck-button__keystroke,[dir=ltr] a.ck.ck-button .ck-button__keystroke{margin-left:var(--ck-spacing-large)}[dir=rtl] .ck.ck-button .ck-button__keystroke,[dir=rtl] a.ck.ck-button .ck-button__keystroke{margin-right:var(--ck-spacing-large)}.ck.ck-button .ck-button__keystroke,a.ck.ck-button .ck-button__keystroke{font-weight:700;opacity:.7}.ck.ck-button.ck-disabled:active,.ck.ck-button.ck-disabled:focus,a.ck.ck-button.ck-disabled:active,a.ck.ck-button.ck-disabled:focus{box-shadow:var(--ck-focus-disabled-outer-shadow),0 0}.ck.ck-button.ck-disabled .ck-button__icon,a.ck.ck-button.ck-disabled .ck-button__icon{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-disabled .ck-button__label,a.ck.ck-button.ck-disabled .ck-button__label{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-disabled .ck-button__keystroke,a.ck.ck-button.ck-disabled .ck-button__keystroke{opacity:.3}.ck.ck-button.ck-button_with-text,a.ck.ck-button.ck-button_with-text{padding:var(--ck-spacing-tiny) var(--ck-spacing-standard)}[dir=ltr] .ck.ck-button.ck-button_with-text .ck-button__icon,[dir=ltr] a.ck.ck-button.ck-button_with-text .ck-button__icon{margin-left:calc(-1*var(--ck-spacing-small));margin-right:var(--ck-spacing-small)}[dir=rtl] .ck.ck-button.ck-button_with-text .ck-button__icon,[dir=rtl] a.ck.ck-button.ck-button_with-text .ck-button__icon{margin-right:calc(-1*var(--ck-spacing-small));margin-left:var(--ck-spacing-small)}.ck.ck-button.ck-button_with-keystroke .ck-button__label,a.ck.ck-button.ck-button_with-keystroke .ck-button__label{flex-grow:1}.ck.ck-button.ck-on,a.ck.ck-button.ck-on{background:var(--ck-color-button-on-background)}.ck.ck-button.ck-on:not(.ck-disabled):hover,a.ck.ck-button.ck-on:not(.ck-disabled):hover{background:var(--ck-color-button-on-hover-background)}.ck.ck-button.ck-on:not(.ck-disabled):active,a.ck.ck-button.ck-on:not(.ck-disabled):active{background:var(--ck-color-button-on-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-on-active-shadow)}.ck.ck-button.ck-on.ck-disabled,a.ck.ck-button.ck-on.ck-disabled{background:var(--ck-color-button-on-disabled-background)}.ck.ck-button.ck-button-save,a.ck.ck-button.ck-button-save{color:var(--ck-color-button-save)}.ck.ck-button.ck-button-cancel,a.ck.ck-button.ck-button-cancel{color:var(--ck-color-button-cancel)}.ck.ck-button-action,a.ck.ck-button-action{background:var(--ck-color-button-action-background)}.ck.ck-button-action:not(.ck-disabled):hover,a.ck.ck-button-action:not(.ck-disabled):hover{background:var(--ck-color-button-action-hover-background)}.ck.ck-button-action:not(.ck-disabled):active,a.ck.ck-button-action:not(.ck-disabled):active{background:var(--ck-color-button-action-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-action-active-shadow)}.ck.ck-button-action.ck-disabled,a.ck.ck-button-action.ck-disabled{background:var(--ck-color-button-action-disabled-background)}.ck.ck-button-action,a.ck.ck-button-action{color:var(--ck-color-button-action-text)}.ck.ck-button-bold,a.ck.ck-button-bold{font-weight:700}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./list.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-list{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none;display:flex;flex-direction:column}.ck.ck-list .ck-list__item,.ck.ck-list .ck-list__separator{display:block}.ck.ck-list .ck-list__item>:focus{position:relative;z-index:var(--ck-z-default)}.ck.ck-list{border-radius:0}.ck-rounded-corners .ck.ck-list,.ck.ck-list.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-list{list-style-type:none;background:var(--ck-color-list-background)}.ck.ck-list__item{cursor:default;min-width:12em}.ck.ck-list__item .ck-button{min-height:unset;width:100%;text-align:left;border-radius:0;padding:calc(0.2*var(--ck-line-height-base)*var(--ck-font-size-base)) calc(0.4*var(--ck-line-height-base)*var(--ck-font-size-base))}.ck.ck-list__item .ck-button .ck-button__label{line-height:calc(1.2*var(--ck-line-height-base)*var(--ck-font-size-base))}.ck.ck-list__item .ck-button:active{box-shadow:none}.ck.ck-list__item .ck-button.ck-on{background:var(--ck-color-list-button-on-background);color:var(--ck-color-list-button-on-text)}.ck.ck-list__item .ck-button.ck-on:active{box-shadow:none}.ck.ck-list__item .ck-button.ck-on:hover:not(.ck-disabled){background:var(--ck-color-list-button-on-background-focus)}.ck.ck-list__item .ck-button.ck-on:focus:not(.ck-disabled){border-color:var(--ck-color-base-background)}.ck.ck-list__item .ck-button:hover:not(.ck-disabled){background:var(--ck-color-list-button-hover-background)}.ck.ck-list__item .ck-switchbutton.ck-on{background:var(--ck-color-list-background);color:inherit}.ck.ck-list__item .ck-switchbutton.ck-on:hover:not(.ck-disabled){background:var(--ck-color-list-button-hover-background);color:inherit}.ck.ck-list__separator{height:1px;width:100%;background:var(--ck-color-base-border)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./switchbutton.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-button.ck-switchbutton .ck-button__toggle,.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{display:block}:root{--ck-switch-button-toggle-width:2.6153846154em;--ck-switch-button-toggle-inner-size:1.0769230769em;--ck-switch-button-toggle-spacing:1px;--ck-switch-button-translation:1.3846153847em}[dir=ltr] .ck.ck-button.ck-switchbutton .ck-button__label{margin-right:calc(2*var(--ck-spacing-large))}[dir=rtl] .ck.ck-button.ck-switchbutton .ck-button__label{margin-left:calc(2*var(--ck-spacing-large))}.ck.ck-button.ck-switchbutton .ck-button__toggle{border-radius:0}.ck-rounded-corners .ck.ck-button.ck-switchbutton .ck-button__toggle,.ck.ck-button.ck-switchbutton .ck-button__toggle.ck-rounded-corners{border-radius:var(--ck-border-radius)}[dir=ltr] .ck.ck-button.ck-switchbutton .ck-button__toggle{margin-left:auto}[dir=rtl] .ck.ck-button.ck-switchbutton .ck-button__toggle{margin-right:auto}.ck.ck-button.ck-switchbutton .ck-button__toggle{transition:background .4s ease;width:var(--ck-switch-button-toggle-width);background:var(--ck-color-switch-button-off-background)}.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{border-radius:0}.ck-rounded-corners .ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner,.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner.ck-rounded-corners{border-radius:var(--ck-border-radius);border-radius:calc(0.5*var(--ck-border-radius))}.ck.ck-button.ck-switchbutton .ck-button__toggle .ck-button__toggle__inner{margin:var(--ck-switch-button-toggle-spacing);width:var(--ck-switch-button-toggle-inner-size);height:var(--ck-switch-button-toggle-inner-size);background:var(--ck-color-switch-button-inner-background);transition:all .3s ease}.ck.ck-button.ck-switchbutton .ck-button__toggle:hover{background:var(--ck-color-switch-button-off-hover-background)}.ck.ck-button.ck-switchbutton .ck-button__toggle:hover .ck-button__toggle__inner{box-shadow:0 0 0 5px var(--ck-color-switch-button-inner-shadow)}.ck.ck-button.ck-switchbutton.ck-disabled .ck-button__toggle{opacity:var(--ck-disabled-opacity)}.ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle{background:var(--ck-color-switch-button-on-background)}.ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle:hover{background:var(--ck-color-switch-button-on-hover-background)}[dir=ltr] .ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle .ck-button__toggle__inner{transform:translateX(var(--ck-switch-button-translation))}[dir=rtl] .ck.ck-button.ck-switchbutton.ck-on .ck-button__toggle .ck-button__toggle__inner{transform:translateX(calc(-1*var(--ck-switch-button-translation)))}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./toolbardropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-toolbar-dropdown .ck.ck-toolbar .ck.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar-dropdown .ck-dropdown__panel .ck-button:focus{z-index:calc(var(--ck-z-default) + 1)}.ck.ck-toolbar-dropdown .ck-toolbar{border:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./listdropdown.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-dropdown .ck-dropdown__panel .ck-list{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list,.ck.ck-dropdown .ck-dropdown__panel .ck-list.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0}.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button,.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:first-child .ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button{border-radius:0}.ck-rounded-corners .ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button,.ck.ck-dropdown .ck-dropdown__panel .ck-list .ck-list__item:last-child .ck-button.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-top-right-radius:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./toolbar.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-toolbar{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none;display:flex;flex-flow:row nowrap;align-items:center}.ck.ck-toolbar>.ck-toolbar__items{display:flex;flex-flow:row wrap;align-items:center;flex-grow:1}.ck.ck-toolbar .ck.ck-toolbar__separator{display:inline-block}.ck.ck-toolbar .ck.ck-toolbar__separator:first-child,.ck.ck-toolbar .ck.ck-toolbar__separator:last-child{display:none}.ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar.ck-toolbar_vertical>.ck-toolbar__items{flex-direction:column}.ck.ck-toolbar.ck-toolbar_floating>.ck-toolbar__items{flex-wrap:nowrap}.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown>.ck-dropdown__button .ck-dropdown__arrow{display:none}.ck.ck-toolbar{border-radius:0}.ck-rounded-corners .ck.ck-toolbar,.ck.ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-toolbar{background:var(--ck-color-toolbar-background);padding:0 var(--ck-spacing-small);border:1px solid var(--ck-color-toolbar-border)}.ck.ck-toolbar>.ck-toolbar__items>*{margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small);margin-right:var(--ck-spacing-small)}.ck.ck-toolbar.ck-toolbar_vertical{padding:0}.ck.ck-toolbar.ck-toolbar_vertical>.ck-toolbar__items>.ck{width:100%;margin:0;border-radius:0;border:0}.ck.ck-toolbar>.ck-toolbar__items>*,.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small)}.ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown>.ck.ck-button.ck-dropdown__button{padding-left:var(--ck-spacing-tiny)}.ck.ck-toolbar .ck.ck-toolbar__separator{align-self:stretch;width:1px;min-width:1px;margin-top:0;margin-bottom:0;background:var(--ck-color-toolbar-border)}.ck-toolbar-container .ck.ck-toolbar{border:0}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__grouped-dropdown,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{padding-right:var(--ck-spacing-small)}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__items>*,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__items>*{margin-left:var(--ck-spacing-small);margin-right:0}.ck.ck-toolbar[dir=rtl]>.ck.ck-toolbar__items>:last-child,[dir=rtl] .ck.ck-toolbar>.ck.ck-toolbar__items>:last-child{margin-left:0}.ck.ck-toolbar[dir=rtl].ck-toolbar_grouping>.ck-toolbar__items,[dir=rtl] .ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{margin-left:var(--ck-spacing-small)}.ck.ck-toolbar[dir=ltr]>.ck.ck-toolbar__grouped-dropdown,[dir=ltr] .ck.ck-toolbar>.ck.ck-toolbar__grouped-dropdown{padding-left:var(--ck-spacing-small)}.ck.ck-toolbar[dir=ltr]>.ck.ck-toolbar__items>:last-child,[dir=ltr] .ck.ck-toolbar>.ck.ck-toolbar__items>:last-child{margin-right:0}.ck.ck-toolbar[dir=ltr].ck-toolbar_grouping>.ck-toolbar__items,[dir=ltr] .ck.ck-toolbar.ck-toolbar_grouping>.ck-toolbar__items{margin-right:var(--ck-spacing-small)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./classiceditor.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor{position:relative}.ck.ck-editor .ck-editor__top .ck-sticky-panel .ck-toolbar{z-index:var(--ck-z-modal)}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius);border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-bottom-width:0}.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar{border-bottom-width:1px;border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius);border-radius:0}.ck.ck-editor__main>.ck-editor__editable{background:var(--ck-color-base-background);border-radius:0}.ck-rounded-corners .ck.ck-editor__main>.ck-editor__editable,.ck.ck-editor__main>.ck-editor__editable.ck-rounded-corners{border-radius:var(--ck-border-radius);border-top-left-radius:0;border-top-right-radius:0}.ck.ck-editor__main>.ck-editor__editable:not(.ck-focused){border-color:var(--ck-color-base-border)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./blockquote.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content blockquote{overflow:hidden;padding-right:1.5em;padding-left:1.5em;margin-left:0;margin-right:0;font-style:italic;border-left:5px solid #ccc}.ck-content[dir=rtl] blockquote{border-left:0;border-right:5px solid #ccc}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./link.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-link_selected{background:var(--ck-color-link-selected-background)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./widget.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-color-resizer:var(--ck-color-focus-border);--ck-resizer-size:10px;--ck-resizer-border-width:1px;--ck-resizer-border-radius:2px;--ck-resizer-offset:calc(var(--ck-resizer-size)/-2 - 2px);--ck-resizer-tooltip-offset:10px;--ck-color-resizer-tooltip-background:#262626;--ck-color-resizer-tooltip-text:#f2f2f2}.ck .ck-widget.ck-widget_with-selection-handle{position:relative}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{position:absolute}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon{display:block}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle,.ck .ck-widget.ck-widget_with-selection-handle:hover .ck-widget__selection-handle{visibility:visible}.ck .ck-size-view{background:var(--ck-color-resizer-tooltip-background);color:var(--ck-color-resizer-tooltip-text);border:1px solid var(--ck-color-resizer-tooltip-text);border-radius:var(--ck-resizer-border-radius);font-size:var(--ck-font-size-tiny);display:block;padding:var(--ck-spacing-small)}.ck .ck-size-view.ck-orientation-bottom-left,.ck .ck-size-view.ck-orientation-bottom-right,.ck .ck-size-view.ck-orientation-top-left,.ck .ck-size-view.ck-orientation-top-right{position:absolute}.ck .ck-size-view.ck-orientation-top-left{top:var(--ck-resizer-tooltip-offset);left:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-top-right{top:var(--ck-resizer-tooltip-offset);right:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-bottom-right{bottom:var(--ck-resizer-tooltip-offset);right:var(--ck-resizer-tooltip-offset)}.ck .ck-size-view.ck-orientation-bottom-left{bottom:var(--ck-resizer-tooltip-offset);left:var(--ck-resizer-tooltip-offset)}:root{--ck-widget-outline-thickness:3px;--ck-widget-handler-icon-size:16px;--ck-widget-handler-animation-duration:200ms;--ck-widget-handler-animation-curve:ease;--ck-color-widget-blurred-border:#dedede;--ck-color-widget-hover-border:#ffc83d;--ck-color-widget-editable-focus-background:var(--ck-color-base-background);--ck-color-widget-drag-handler-icon-color:var(--ck-color-base-background)}.ck .ck-widget{outline-width:var(--ck-widget-outline-thickness);outline-style:solid;outline-color:transparent;transition:outline-color var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve)}.ck .ck-widget.ck-widget_selected,.ck .ck-widget.ck-widget_selected:hover{outline:var(--ck-widget-outline-thickness) solid var(--ck-color-focus-border)}.ck .ck-widget:hover{outline-color:var(--ck-color-widget-hover-border)}.ck .ck-editor__nested-editable{border:1px solid transparent}.ck .ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck .ck-editor__nested-editable:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-inner-shadow),0 0;background-color:var(--ck-color-widget-editable-focus-background)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{padding:4px;box-sizing:border-box;background-color:transparent;opacity:0;transition:background-color var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve),visibility var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve),opacity var(--ck-widget-handler-animation-duration) var(--ck-widget-handler-animation-curve);border-radius:var(--ck-border-radius) var(--ck-border-radius) 0 0;transform:translateY(-100%);left:calc(0px - var(--ck-widget-outline-thickness))}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon{width:var(--ck-widget-handler-icon-size);height:var(--ck-widget-handler-icon-size);color:var(--ck-color-widget-drag-handler-icon-color)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator{opacity:0;transition:opacity .3s var(--ck-widget-handler-animation-curve)}.ck .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle:hover .ck-icon .ck-icon__selected-indicator{opacity:1}.ck .ck-widget.ck-widget_with-selection-handle:hover .ck-widget__selection-handle{opacity:1;background-color:var(--ck-color-widget-hover-border)}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle,.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected:hover .ck-widget__selection-handle{opacity:1;background-color:var(--ck-color-focus-border)}.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator,.ck .ck-widget.ck-widget_with-selection-handle.ck-widget_selected:hover .ck-widget__selection-handle .ck-icon .ck-icon__selected-indicator{opacity:1}.ck-editor__editable>.ck-widget.ck-widget_with-selection-handle:first-child,.ck-editor__editable blockquote>.ck-widget.ck-widget_with-selection-handle:first-child{margin-top:calc(1em + var(--ck-widget-handler-icon-size))}.ck[dir=rtl] .ck-widget.ck-widget_with-selection-handle .ck-widget__selection-handle{left:auto;right:calc(0px - var(--ck-widget-outline-thickness))}.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover{outline-color:var(--ck-color-widget-blurred-border)}.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected.ck-widget_with-selection-handle .ck-widget__selection-handle,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected.ck-widget_with-selection-handle .ck-widget__selection-handle:hover,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover.ck-widget_with-selection-handle .ck-widget__selection-handle,.ck-editor__editable.ck-blurred .ck-widget.ck-widget_selected:hover.ck-widget_with-selection-handle .ck-widget__selection-handle:hover{background:var(--ck-color-widget-blurred-border)}.ck-editor__editable.ck-read-only .ck-widget{--ck-widget-outline-thickness:0}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./labeledinput.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-labeled-input .ck-labeled-input__status{font-size:var(--ck-font-size-small);margin-top:var(--ck-spacing-small);white-space:normal}.ck.ck-labeled-input .ck-labeled-input__status_error{color:var(--ck-color-base-error)}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./inputtext.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-input-text-width:18em}.ck.ck-input-text{border-radius:0}.ck-rounded-corners .ck.ck-input-text,.ck.ck-input-text.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-input-text{box-shadow:var(--ck-inner-shadow),0 0;background:var(--ck-color-input-background);border:1px solid var(--ck-color-input-border);padding:var(--ck-spacing-extra-tiny) var(--ck-spacing-medium);min-width:var(--ck-input-text-width);min-height:var(--ck-ui-component-min-height);transition:box-shadow .2s ease-in-out,border .2s ease-in-out}.ck.ck-input-text:focus{outline:none;border:var(--ck-focus-ring);box-shadow:var(--ck-focus-outer-shadow),var(--ck-inner-shadow)}.ck.ck-input-text[readonly]{border:1px solid var(--ck-color-input-disabled-border);background:var(--ck-color-input-disabled-background);color:var(--ck-color-input-disabled-text)}.ck.ck-input-text[readonly]:focus{box-shadow:var(--ck-focus-disabled-outer-shadow),var(--ck-inner-shadow)}.ck.ck-input-text.ck-error{border-color:var(--ck-color-input-error-border);animation:ck-text-input-shake .3s ease both}.ck.ck-input-text.ck-error:focus{box-shadow:var(--ck-focus-error-outer-shadow),var(--ck-inner-shadow)}@keyframes ck-text-input-shake{20%{transform:translateX(-2px)}40%{transform:translateX(2px)}60%{transform:translateX(-1px)}80%{transform:translateX(1px)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./textalternativeform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-text-alternative-form{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-text-alternative-form .ck-labeled-input{display:inline-block}.ck.ck-text-alternative-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-text-alternative-form{flex-wrap:wrap}.ck.ck-text-alternative-form .ck-labeled-input{flex-basis:100%}.ck.ck-text-alternative-form .ck-button{flex-basis:50%}}.ck.ck-text-alternative-form{padding:var(--ck-spacing-standard)}.ck.ck-text-alternative-form:focus{outline:none}[dir=ltr] .ck.ck-text-alternative-form>:not(:first-child),[dir=rtl] .ck.ck-text-alternative-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-text-alternative-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-text-alternative-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-text-alternative-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-text-alternative-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-text-alternative-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-text-alternative-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-text-alternative-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-text-alternative-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./balloonpanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-balloon-panel-arrow-z-index:calc(var(--ck-z-default) - 3)}.ck.ck-balloon-panel{display:none;position:absolute;z-index:var(--ck-z-modal)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after,.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{content:\\\"\\\";position:absolute}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel[class*=arrow_n]:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel[class*=arrow_n]:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel[class*=arrow_s]:before{z-index:var(--ck-balloon-panel-arrow-z-index)}.ck.ck-balloon-panel[class*=arrow_s]:after{z-index:calc(var(--ck-balloon-panel-arrow-z-index) + 1)}.ck.ck-balloon-panel.ck-balloon-panel_visible{display:block}:root{--ck-balloon-arrow-offset:2px;--ck-balloon-arrow-height:10px;--ck-balloon-arrow-half-width:8px}.ck.ck-balloon-panel{border-radius:0}.ck-rounded-corners .ck.ck-balloon-panel,.ck.ck-balloon-panel.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-balloon-panel{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after,.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{width:0;height:0;border-style:solid}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:var(--ck-balloon-arrow-height);border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:0}.ck.ck-balloon-panel[class*=arrow_n]:before{border-bottom-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-color:transparent;border-right-color:transparent;border-top-color:transparent}.ck.ck-balloon-panel[class*=arrow_n]:after{border-bottom-color:var(--ck-color-panel-background);margin-top:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:0;border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:var(--ck-balloon-arrow-height)}.ck.ck-balloon-panel[class*=arrow_s]:before{border-top-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-color:transparent;border-bottom-color:transparent;border-right-color:transparent}.ck.ck-balloon-panel[class*=arrow_s]:after{border-top-color:var(--ck-color-panel-background);margin-bottom:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:before{left:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:before{right:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:before{left:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:before{right:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./balloonrotator.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-balloon-rotator__navigation{display:flex;align-items:center;justify-content:center}.ck .ck-balloon-rotator__content .ck-toolbar{justify-content:center}.ck .ck-balloon-rotator__navigation{background:var(--ck-color-toolbar-background);border-bottom:1px solid var(--ck-color-toolbar-border);padding:0 var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation>*{margin-right:var(--ck-spacing-small);margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation .ck-balloon-rotator__counter{margin-right:var(--ck-spacing-standard);margin-left:var(--ck-spacing-small)}.ck .ck-balloon-rotator__content .ck.ck-annotation-wrapper{box-shadow:none}\"","var content = require(\"!!../../../../../node_modules/postcss-loader/src/index.js??ref--5-1!./fakepanel.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-fake-panel{position:absolute;z-index:calc(var(--ck-z-modal) - 1)}.ck .ck-fake-panel div{position:absolute}.ck .ck-fake-panel div:first-child{z-index:2}.ck .ck-fake-panel div:nth-child(2){z-index:1}:root{--ck-balloon-fake-panel-offset-horizontal:6px;--ck-balloon-fake-panel-offset-vertical:6px}.ck .ck-fake-panel div{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border);border-radius:var(--ck-border-radius);width:100%;height:100%}.ck .ck-fake-panel div:first-child{margin-left:var(--ck-balloon-fake-panel-offset-horizontal);margin-top:var(--ck-balloon-fake-panel-offset-vertical)}.ck .ck-fake-panel div:nth-child(2){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*2);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*2)}.ck .ck-fake-panel div:nth-child(3){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*3);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*3)}.ck .ck-balloon-panel_arrow_s+.ck-fake-panel,.ck .ck-balloon-panel_arrow_se+.ck-fake-panel,.ck .ck-balloon-panel_arrow_sw+.ck-fake-panel{--ck-balloon-fake-panel-offset-vertical:-6px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./image.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .image{display:table;clear:both;text-align:center;margin:1em auto}.ck-content .image>img{display:block;margin:0 auto;max-width:100%;min-width:50px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadprogress.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-editor__editable .image{position:relative}.ck.ck-editor__editable .image .ck-progress-bar{position:absolute;top:0;left:0}.ck.ck-editor__editable .image.ck-appear{animation:fadeIn .7s}.ck.ck-editor__editable .image .ck-progress-bar{height:2px;width:0;background:var(--ck-color-upload-bar-background);transition:width .1s}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadicon.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-image-upload-complete-icon{display:block;position:absolute;top:10px;right:10px;border-radius:50%}.ck-image-upload-complete-icon:after{content:\\\"\\\";position:absolute}:root{--ck-color-image-upload-icon:#fff;--ck-color-image-upload-icon-background:#008a00;--ck-image-upload-icon-size:20px;--ck-image-upload-icon-width:2px}.ck-image-upload-complete-icon{width:var(--ck-image-upload-icon-size);height:var(--ck-image-upload-icon-size);opacity:0;background:var(--ck-color-image-upload-icon-background);animation-name:ck-upload-complete-icon-show,ck-upload-complete-icon-hide;animation-fill-mode:forwards,forwards;animation-duration:.5s,.5s;font-size:var(--ck-image-upload-icon-size);animation-delay:0ms,3s}.ck-image-upload-complete-icon:after{left:25%;top:50%;opacity:0;height:0;width:0;transform:scaleX(-1) rotate(135deg);transform-origin:left top;border-top:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);border-right:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);animation-name:ck-upload-complete-icon-check;animation-duration:.5s;animation-delay:.5s;animation-fill-mode:forwards;box-sizing:border-box}@keyframes ck-upload-complete-icon-show{0%{opacity:0}to{opacity:1}}@keyframes ck-upload-complete-icon-hide{0%{opacity:1}to{opacity:0}}@keyframes ck-upload-complete-icon-check{0%{opacity:1;width:0;height:0}33%{width:.3em;height:0}to{opacity:1;width:.3em;height:.45em}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imageuploadloader.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-upload-placeholder-loader{position:absolute;display:flex;align-items:center;justify-content:center;top:0;left:0}.ck .ck-upload-placeholder-loader:before{content:\\\"\\\";position:relative}:root{--ck-color-upload-placeholder-loader:#b3b3b3;--ck-upload-placeholder-loader-size:32px}.ck .ck-image-upload-placeholder{width:100%;margin:0}.ck .ck-upload-placeholder-loader{width:100%;height:100%}.ck .ck-upload-placeholder-loader:before{width:var(--ck-upload-placeholder-loader-size);height:var(--ck-upload-placeholder-loader-size);border-radius:50%;border-top:3px solid var(--ck-color-upload-placeholder-loader);border-right:2px solid transparent;animation:ck-upload-placeholder-loader 1s linear infinite}@keyframes ck-upload-placeholder-loader{to{transform:rotate(1turn)}}\"","module.exports = \".ck.ck-heading_heading1{font-size:20px}.ck.ck-heading_heading2{font-size:17px}.ck.ck-heading_heading3{font-size:14px}.ck[class*=ck-heading_heading]{font-weight:700}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__button .ck-button__label{width:8em}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__panel .ck-list__item{min-width:18em}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imagecaption.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:#333;background-color:#f7f7f7;padding:.6em;font-size:.75em;outline-offset:-1px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./imagestyle.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-image-style-spacing:1.5em}.ck-content .image-style-align-center,.ck-content .image-style-align-left,.ck-content .image-style-align-right,.ck-content .image-style-side{max-width:50%}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing)}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content .image-style-align-right{float:right;margin-left:var(--ck-image-style-spacing)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./linkform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-link-form{display:flex}.ck.ck-link-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-link-form{flex-wrap:wrap}.ck.ck-link-form .ck-labeled-input{flex-basis:100%}.ck.ck-link-form .ck-button{flex-basis:50%}}.ck.ck-link-form_layout-vertical{display:block}.ck.ck-link-form{padding:var(--ck-spacing-standard)}.ck.ck-link-form:focus{outline:none}[dir=ltr] .ck.ck-link-form>:not(:first-child),[dir=rtl] .ck.ck-link-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}.ck.ck-link-form_layout-vertical{padding:0;min-width:var(--ck-input-text-width)}.ck.ck-link-form_layout-vertical .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) var(--ck-spacing-small)}.ck.ck-link-form_layout-vertical .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form_layout-vertical .ck-button{padding:var(--ck-spacing-standard);margin:0;border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border);width:50%}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}.ck.ck-link-form_layout-vertical .ck.ck-list{margin-left:0}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton{border:0;width:100%}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton:hover{background:none}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./linkactions.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-link-actions{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-link-actions .ck-link-actions__preview{display:inline-block}.ck.ck-link-actions .ck-link-actions__preview .ck-button__label{overflow:hidden}@media screen and (max-width:600px){.ck.ck-link-actions{flex-wrap:wrap}.ck.ck-link-actions .ck-link-actions__preview{flex-basis:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){flex-basis:50%}}.ck.ck-link-actions{padding:var(--ck-spacing-standard)}.ck.ck-link-actions .ck-button.ck-link-actions__preview{padding-left:0;padding-right:0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{padding:0 var(--ck-spacing-medium);color:var(--ck-color-link-default);text-overflow:ellipsis;cursor:pointer;max-width:var(--ck-input-text-width);min-width:3em;text-align:center}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label:hover{text-decoration:underline}.ck.ck-link-actions .ck-button.ck-link-actions__preview,.ck.ck-link-actions .ck-button.ck-link-actions__preview:active,.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus,.ck.ck-link-actions .ck-button.ck-link-actions__preview:hover{background:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:active{box-shadow:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus .ck-button__label{text-decoration:underline}.ck.ck-link-actions:focus{outline:none}[dir=ltr] .ck.ck-link-actions .ck-button:not(:first-child),[dir=rtl] .ck.ck-link-actions .ck-button:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-actions{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-actions .ck-button.ck-link-actions__preview{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{min-width:0;max-width:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaembedediting.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-media__wrapper .ck-media__placeholder{display:flex;flex-direction:column;align-items:center}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-tooltip{display:block}@media (hover:none){.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-tooltip{display:none}}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url{max-width:100%;position:relative}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url:hover .ck-tooltip{visibility:visible;opacity:1}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url .ck-media__placeholder__url__text{overflow:hidden;display:block}.ck-media__wrapper[data-oembed-url*=\\\"facebook.com\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"google.com/maps\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder__icon *,.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck-media__placeholder__icon *{display:none}.ck-editor__editable:not(.ck-read-only) .ck-media__wrapper>:not(.ck-media__placeholder),.ck-editor__editable:not(.ck-read-only) .ck-widget:not(.ck-widget_selected) .ck-media__placeholder{pointer-events:none}:root{--ck-media-embed-placeholder-icon-size:3em;--ck-color-media-embed-placeholder-url-text:#757575;--ck-color-media-embed-placeholder-url-text-hover:var(--ck-color-base-text)}.ck-media__wrapper{margin:0 auto}.ck-media__wrapper .ck-media__placeholder{padding:calc(3*var(--ck-spacing-standard));background:var(--ck-color-base-foreground)}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon{min-width:var(--ck-media-embed-placeholder-icon-size);height:var(--ck-media-embed-placeholder-icon-size);margin-bottom:var(--ck-spacing-large);background-position:50%;background-size:cover}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon .ck-icon{width:100%;height:100%}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url__text{color:var(--ck-color-media-embed-placeholder-url-text);white-space:nowrap;text-align:center;font-style:italic;text-overflow:ellipsis}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:var(--ck-color-media-embed-placeholder-url-text-hover);cursor:pointer;text-decoration:underline}.ck-media__wrapper[data-oembed-url*=\\\"open.spotify.com\\\"]{max-width:300px;max-height:380px}.ck-media__wrapper[data-oembed-url*=\\\"google.com/maps\\\"] 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.ck-media__placeholder .ck-media__placeholder__url__text{color:#ffe0fe}.ck-media__wrapper[data-oembed-url*=\\\"instagram.com\\\"] .ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder{background:linear-gradient(90deg,#71c6f4,#0d70a5)}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__icon{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA0MDAgNDAwIj48cGF0aCBkPSJNNDAwIDIwMGMwIDExMC41LTg5LjUgMjAwLTIwMCAyMDBTMCAzMTAuNSAwIDIwMCA4OS41IDAgMjAwIDBzMjAwIDg5LjUgMjAwIDIwMHpNMTYzLjQgMzA1LjVjODguNyAwIDEzNy4yLTczLjUgMTM3LjItMTM3LjIgMC0yLjEgMC00LjItLjEtNi4yIDkuNC02LjggMTcuNi0xNS4zIDI0LjEtMjUtOC42IDMuOC0xNy45IDYuNC0yNy43IDcuNiAxMC02IDE3LjYtMTUuNCAyMS4yLTI2LjctOS4zIDUuNS0xOS42IDkuNS0zMC42IDExLjctOC44LTkuNC0yMS4zLTE1LjItMzUuMi0xNS4yLTI2LjYgMC00OC4yIDIxLjYtNDguMiA0OC4yIDAgMy44LjQgNy41IDEuMyAxMS00MC4xLTItNzUuNi0yMS4yLTk5LjQtNTAuNC00LjEgNy4xLTYuNSAxNS40LTYuNSAyNC4yIDAgMTYuNyA4LjUgMzEuNSAyMS41IDQwLjEtNy45LS4yLTE1LjMtMi40LTIxLjgtNnYuNmMwIDIzLjQgMTYuNiA0Mi44IDM4LjcgNDcuMy00IDEuMS04LjMgMS43LTEyLjcgMS43LTMuMSAwLTYuMS0uMy05LjEtLjkgNi4xIDE5LjIgMjMuOSAzMy4xIDQ1IDMzLjUtMTYuNSAxMi45LTM3LjMgMjAuNi01OS45IDIwLjYtMy45IDAtNy43LS4yLTExLjUtLjcgMjEuMSAxMy44IDQ2LjUgMjEuOCA3My43IDIxLjgiIGZpbGw9IiNmZmYiLz48L3N2Zz4=)}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__url__text{color:#b8e6ff}.ck-media__wrapper[data-oembed-url*=\\\"twitter.com\\\"] .ck.ck-media__placeholder .ck-media__placeholder__url__text:hover{color:#fff}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaform.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck.ck-media-form{display:flex;align-items:flex-start;flex-direction:row;flex-wrap:nowrap}.ck.ck-media-form .ck-labeled-input{display:inline-block}.ck.ck-media-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-media-form{flex-wrap:wrap}.ck.ck-media-form .ck-labeled-input{flex-basis:100%}.ck.ck-media-form .ck-button{flex-basis:50%}}.ck.ck-media-form{padding:var(--ck-spacing-standard)}.ck.ck-media-form:focus{outline:none}[dir=ltr] .ck.ck-media-form>:not(:first-child),[dir=rtl] .ck.ck-media-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-media-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-media-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-media-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-media-form .ck-labeled-input .ck-labeled-input__error{white-space:normal}.ck.ck-media-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-media-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-media-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-media-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-media-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./mediaembed.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .media{clear:both;margin:1em 0;display:block;min-width:15em}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./tableediting.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \":root{--ck-color-table-focused-cell-background:#f5fafe}.ck-widget.table td.ck-editor__nested-editable.ck-editor__nested-editable_focused,.ck-widget.table th.ck-editor__nested-editable.ck-editor__nested-editable_focused{background:var(--ck-color-table-focused-cell-background);border-style:none;outline:1px solid var(--ck-color-focus-border);outline-offset:-1px}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./inserttable.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck .ck-insert-table-dropdown__grid{display:flex;flex-direction:row;flex-wrap:wrap}:root{--ck-insert-table-dropdown-padding:10px;--ck-insert-table-dropdown-box-height:11px;--ck-insert-table-dropdown-box-width:12px;--ck-insert-table-dropdown-box-margin:1px}.ck .ck-insert-table-dropdown__grid{width:calc(var(--ck-insert-table-dropdown-box-width)*10 + var(--ck-insert-table-dropdown-box-margin)*20 + var(--ck-insert-table-dropdown-padding)*2);padding:var(--ck-insert-table-dropdown-padding) var(--ck-insert-table-dropdown-padding) 0}.ck .ck-insert-table-dropdown__label{text-align:center}.ck .ck-insert-table-dropdown-grid-box{width:var(--ck-insert-table-dropdown-box-width);height:var(--ck-insert-table-dropdown-box-height);margin:var(--ck-insert-table-dropdown-box-margin);border:1px solid var(--ck-color-base-border);border-radius:1px}.ck .ck-insert-table-dropdown-grid-box.ck-on{border-color:var(--ck-color-focus-border);background:var(--ck-color-focus-outer-shadow)}\"","var content = require(\"!!../../../node_modules/postcss-loader/src/index.js??ref--5-1!./table.css\");\n\nif (typeof content === 'string') {\n content = [[module.id, content, '']];\n}\n\nvar options = {\"injectType\":\"singletonStyleTag\"}\n\noptions.insert = \"head\";\noptions.singleton = true;\n\nvar update = require(\"!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js\")(content, options);\n\nif (content.locals) {\n module.exports = content.locals;\n}\n","module.exports = \".ck-content .table{margin:1em auto;display:table}.ck-content .table table{border-collapse:collapse;border-spacing:0;border:1px double #b3b3b3}.ck-content .table table td,.ck-content .table table th{min-width:2em;padding:.4em;border-color:#d9d9d9}.ck-content .table table th{font-weight:700;background:#fafafa}\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/conversion\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport UpcastHelpers from './upcasthelpers';\nimport DowncastHelpers from './downcasthelpers';\n\n/**\n * A utility class that helps add converters to upcast and downcast dispatchers.\n *\n * We recommend reading the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide first to\n * understand the core concepts of the conversion mechanisms.\n *\n * An instance of the conversion manager is available in the\n * {@link module:core/editor/editor~Editor#conversion `editor.conversion`} property\n * and by default has the following groups of dispatchers (i.e. directions of conversion):\n *\n * * `downcast` (editing and data downcasts)\n * * `editingDowncast`\n * * `dataDowncast`\n * * `upcast`\n *\n * # One-way converters\n *\n * To add a converter to a specific group, use the {@link module:engine/conversion/conversion~Conversion#for `for()`}\n * method:\n *\n *\t\t// Add a converter to editing downcast and data downcast.\n *\t\teditor.conversion.for( 'downcast' ).elementToElement( config ) );\n *\n *\t\t// Add a converter to the data pipepline only:\n *\t\teditor.conversion.for( 'dataDowncast' ).elementToElement( dataConversionConfig ) );\n *\n *\t\t// And a slightly different one for the editing pipeline:\n *\t\teditor.conversion.for( 'editingDowncast' ).elementToElement( editingConversionConfig ) );\n *\n * See {@link module:engine/conversion/conversion~Conversion#for `for()`} method documentation to learn more about\n * available conversion helpers and how to use your custom ones.\n *\n * # Two-way converters\n *\n * Besides using one-way converters via the `for()` method, you can also use other methods available in this\n * class to add two-way converters (upcast and downcast):\n *\n * * {@link module:engine/conversion/conversion~Conversion#elementToElement `elementToElement()`} –\n * Model element to view element and vice versa.\n * * {@link module:engine/conversion/conversion~Conversion#attributeToElement `attributeToElement()`} –\n * Model attribute to view element and vice versa.\n * * {@link module:engine/conversion/conversion~Conversion#attributeToAttribute `attributeToAttribute()`} –\n * Model attribute to view element and vice versa.\n */\nexport default class Conversion {\n\t/**\n\t * Creates a new conversion instance.\n\t *\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher>} downcastDispatchers\n\t * @param {module:engine/conversion/upcastdispatcher~UpcastDispatcher|\n\t * Array.<module:engine/conversion/upcastdispatcher~UpcastDispatcher>} upcastDispatchers\n\t */\n\tconstructor( downcastDispatchers, upcastDispatchers ) {\n\t\t/**\n\t\t * Maps dispatchers group name to ConversionHelpers instances.\n\t\t *\n\t\t * @private\n\t\t * @member {Map.<String,module:engine/conversion/conversionhelpers~ConversionHelpers>}\n\t\t */\n\t\tthis._helpers = new Map();\n\n\t\t// Define default 'downcast' & 'upcast' dispatchers groups. Those groups are always available as two-way converters needs them.\n\t\tthis._downcast = Array.isArray( downcastDispatchers ) ? downcastDispatchers : [ downcastDispatchers ];\n\t\tthis._createConversionHelpers( { name: 'downcast', dispatchers: this._downcast, isDowncast: true } );\n\n\t\tthis._upcast = Array.isArray( upcastDispatchers ) ? upcastDispatchers : [ upcastDispatchers ];\n\t\tthis._createConversionHelpers( { name: 'upcast', dispatchers: this._upcast, isDowncast: false } );\n\t}\n\n\t/**\n\t * Define an alias for registered dispatcher.\n\t *\n\t *\t\tconst conversion = new Conversion(\n\t *\t\t\t[ dataDowncastDispatcher, editingDowncastDispatcher ],\n\t *\t\t\tupcastDispatcher\n\t *\t\t);\n\t *\n\t *\t\tconversion.addAlias( 'dataDowncast', dataDowncastDispatcher );\n\t *\n\t * @param {String} alias An alias of a dispatcher.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher} dispatcher Dispatcher which should have an alias.\n\t */\n\taddAlias( alias, dispatcher ) {\n\t\tconst isDowncast = this._downcast.includes( dispatcher );\n\t\tconst isUpcast = this._upcast.includes( dispatcher );\n\n\t\tif ( !isUpcast && !isDowncast ) {\n\t\t\t/**\n\t\t\t * Trying to register and alias for a dispatcher that nas not been registered.\n\t\t\t *\n\t\t\t * @error conversion-add-alias-dispatcher-not-registered\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'conversion-add-alias-dispatcher-not-registered: ' +\n\t\t\t\t'Trying to register and alias for a dispatcher that nas not been registered.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tthis._createConversionHelpers( { name: alias, dispatchers: [ dispatcher ], isDowncast } );\n\t}\n\n\t/**\n\t * Provides a chainable API to assign converters to conversion dispatchers group.\n\t *\n\t * If the given group name has not been registered, the\n\t * {@link module:utils/ckeditorerror~CKEditorError `conversion-for-unknown-group` error} is thrown.\n\t *\n\t * You can use conversion helpers available directly in the `for()` chain or your custom ones via\n\t * the {@link module:engine/conversion/conversionhelpers~ConversionHelpers#add `add()`} method.\n\t *\n\t * # Using bulit-in conversion helpers\n\t *\n\t * The `for()` chain comes with a set of conversion helpers which you can use like this:\n\t *\n\t *\t\teditor.conversion.for( 'downcast' )\n\t *\t\t\t.elementToElement( config1 ) // Adds an element-to-element downcast converter.\n\t *\t\t\t.attributeToElement( config2 ); // Adds an attribute-to-element downcast converter.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' )\n\t *\t\t\t.elementToAttribute( config3 ); // Adds an element-to-attribute upcast converter.\n\t *\n\t * Refer to the documentation of built-in conversion helpers to learn about their configuration options.\n\t *\n\t * * downcast (model-to-view) conversion helpers:\n\t *\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`},\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement `attributeToElement()`},\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToAttribute `attributeToAttribute()`}.\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#markerToElement `markerToElement()`}.\n\t *\t* {@link module:engine/conversion/downcasthelpers~DowncastHelpers#markerToHighlight `markerToHighlight()`}.\n\t *\n\t * * upcast (view-to-model) conversion helpers:\n\t *\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToElement `elementToElement()`},\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToAttribute `elementToAttribute()`},\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#attributeToAttribute `attributeToAttribute()`}.\n\t *\t* {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToMarker `elementToMarker()`}.\n\t *\n\t * # Using custom conversion helpers\n\t *\n\t * If you need to implement a nontypical converter, you can do so by calling:\n\t *\n\t *\t\teditor.conversion.for( direction ).add( customHelper );\n\t *\n\t * The `.add()` method takes exactly one parameter, which is a function. This function should accept one parameter that\n\t * is a dispatcher instance. The function should add an actual converter to the passed dispatcher instance.\n\t *\n\t * Example:\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).add( dispatcher => {\n\t *\t\t\tdispatcher.on( 'element:a', ( evt, data, conversionApi ) => {\n\t *\t\t\t\t// Do something with a view <a> element.\n\t *\t\t\t} );\n\t *\t\t} );\n\t *\n\t * Refer to the documentation of {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n\t * and {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} to learn how to write\n\t * custom converters.\n\t *\n\t * @param {String} groupName The name of dispatchers group to add the converters to.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers|module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tfor( groupName ) {\n\t\tif ( !this._helpers.has( groupName ) ) {\n\t\t\t/**\n\t\t\t * Trying to add a converter to an unknown dispatchers group.\n\t\t\t *\n\t\t\t * @error conversion-for-unknown-group\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'conversion-for-unknown-group: Trying to add a converter to an unknown dispatchers group.', this );\n\t\t}\n\n\t\treturn this._helpers.get( groupName );\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model element to a view element (and vice versa).\n\t * For example, the model `<paragraph>Foo</paragraph>` is `<p>Foo</p>` in the view.\n\t *\n\t *\t\t// A simple conversion from the `paragraph` model element to the `<p>` view element (and vice versa).\n\t *\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'p' } );\n\t *\n\t *\t\t// Override other converters by specifying a converter definition with a higher priority.\n\t *\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'div', converterPriority: 'high' } );\n\t *\n\t *\t\t// View specified as an object instead of a string.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'fancyParagraph',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to a `paragraph` element.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'p',\n\t *\t\t\tupcastAlso: [\n\t *\t\t\t\t'div',\n\t *\t\t\t\t{\n\t *\t\t\t\t\t// Any element with the `display: block` style.\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\tdisplay: 'block'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// `upcastAlso` set as callback enables a conversion of a wide range of different view elements.\n\t *\t\teditor.conversion.elementToElement( {\n\t *\t\t\tmodel: 'heading',\n\t *\t\t\tview: 'h2',\n\t *\t\t\t// Convert \"headling-like\" paragraphs to headings.\n\t *\t\t\tupcastAlso: viewElement => {\n\t *\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\tif ( size > 26 ) {\n\t *\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\treturn null;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * `definition.model` is a `String` with a model element name to convert from or to.\n\t * See {@link module:engine/conversion/conversion~ConverterDefinition} to learn about other parameters.\n\t *\n\t * @param {module:engine/conversion/conversion~ConverterDefinition} definition The converter definition.\n\t */\n\telementToElement( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).elementToElement( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.elementToElement( {\n\t\t\t\t\tmodel,\n\t\t\t\t\tview,\n\t\t\t\t\tconverterPriority: definition.converterPriority\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model attribute to a view element (and vice versa).\n\t * For example, a model text node with `\"Foo\"` as data and the `bold` attribute is `<strong>Foo</strong>` in the view.\n\t *\n\t *\t\t// A simple conversion from the `bold=true` attribute to the `<strong>` view element (and vice versa).\n\t *\t\teditor.conversion.attributeToElement( { model: 'bold', view: 'strong' } );\n\t *\n\t *\t\t// Override other converters by specifying a converter definition with a higher priority.\n\t *\t\teditor.conversion.attributeToElement( { model: 'bold', view: 'b', converterPriority: 'high' } );\n\t *\n\t *\t\t// View specified as an object instead of a string.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: 'bold'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `config.model.name` to define the conversion only from a given node type, `$text` in this case.\n\t *\t\t// The same attribute on different elements may then be handled by a different converter.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'textDecoration',\n\t *\t\t\t\tvalues: [ 'underline', 'lineThrough' ],\n\t *\t\t\t\tname: '$text'\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tunderline: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-decoration': 'underline'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tlineThrough: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-decoration': 'line-through'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to the `bold` attribute.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'strong',\n\t *\t\t\tupcastAlso: [\n\t *\t\t\t\t'b',\n\t *\t\t\t\t{\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tclasses: 'bold'\n\t *\t\t\t\t},\n\t *\t\t\t\t{\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-weight': 'bold'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tviewElement => {\n\t *\t\t\t\t\tconst fontWeight = viewElement.getStyle( 'font-weight' );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && fontWeight && /\\d+/.test() && Number( fontWeight ) > 500 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn {\n\t *\t\t\t\t\t\t\tname: true,\n\t *\t\t\t\t\t\t\tstyles: [ 'font-weight' ]\n\t *\t\t\t\t\t\t};\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Conversion from and to a model attribute key whose value is an enum (`fontSize=big|small`).\n\t *\t\t// `upcastAlso` set as callback enables a conversion of a wide range of different view elements.\n\t *\t\teditor.conversion.attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalues: [ 'big', 'small' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tbig: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '1.2em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '0.8em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tupcastAlso: {\n\t *\t\t\t\tbig: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && size > 10 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\n\t *\t\t\t\t\tif ( !fontSize ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst match = fontSize.match( /(\\d+)\\s*px/ );\n\t *\n\t *\t\t\t\t\tif ( !match ) {\n\t *\t\t\t\t\t\treturn null;\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\tconst size = Number( match[ 1 ] );\n\t *\n\t *\t\t\t\t\tif ( viewElement.is( 'span' ) && size < 10 ) {\n\t *\t\t\t\t\t\t// Returned value can be an object with the matched properties.\n\t *\t\t\t\t\t\t// These properties will be \"consumed\" during the conversion.\n\t *\t\t\t\t\t\t// See `engine.view.Matcher~MatcherPattern` and `engine.view.Matcher#match` for more details.\n\t *\n\t *\t\t\t\t\t\treturn { name: true, styles: [ 'font-size' ] };\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * The `definition.model` parameter specifies which model attribute should be converted from or to. It can be a `{ key, value }` object\n\t * describing the attribute key and value to convert or a `String` specifying just the attribute key (then `value` is set to `true`).\n\t * See {@link module:engine/conversion/conversion~ConverterDefinition} to learn about other parameters.\n\t *\n\t * @param {module:engine/conversion/conversion~ConverterDefinition} definition The converter definition.\n\t */\n\tattributeToElement( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).attributeToElement( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.elementToAttribute( {\n\t\t\t\t\tview,\n\t\t\t\t\tmodel,\n\t\t\t\t\tconverterPriority: definition.converterPriority\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Sets up converters between the model and the view that convert a model attribute to a view attribute (and vice versa).\n\t * For example, `<image src='foo.jpg'></image>` is converted to `<img src='foo.jpg'></img>` (the same attribute key and value).\n\t * This type of converters is intended to be used with {@link module:engine/model/element~Element model element} nodes.\n\t * To convert text attributes {@link module:engine/conversion/conversion~Conversion#attributeToElement `attributeToElement converter`}\n\t * should be set up.\n\t *\n\t *\t\t// A simple conversion from the `source` model attribute to the `src` view attribute (and vice versa).\n\t *\t\teditor.conversion.attributeToAttribute( { model: 'source', view: 'src' } );\n\t *\n\t *\t\t// Attribute values are strictly specified.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'aside',\n\t *\t\t\t\tvalues: [ 'aside' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\taside: {\n\t *\t\t\t\t\tname: 'img',\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'aside', 'half-size' ]\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Set the style attribute.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'aside',\n\t *\t\t\t\tvalues: [ 'aside' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\taside: {\n\t *\t\t\t\t\tname: 'img',\n\t *\t\t\t\t\tkey: 'style',\n\t *\t\t\t\t\tvalue: {\n\t *\t\t\t\t\t\tfloat: 'right',\n\t *\t\t\t\t\t\twidth: '50%',\n\t *\t\t\t\t\t\tmargin: '5px'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Conversion from and to a model attribute key whose value is an enum (`align=right|center`).\n\t *\t\t// Use `upcastAlso` to define other view elements that should also be converted to the `align=right` attribute.\n\t *\t\teditor.conversion.attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'align',\n\t *\t\t\t\tvalues: [ 'right', 'center' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tright: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: 'align-right'\n\t *\t\t\t\t},\n\t *\t\t\t\tcenter: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: 'align-center'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tupcastAlso: {\n\t *\t\t\t\tright: {\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-align': 'right'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tcenter: {\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'text-align': 'center'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * The `definition.model` parameter specifies which model attribute should be converted from and to.\n\t * It can be a `{ key, [ values ], [ name ] }` object or a `String`, which will be treated like `{ key: definition.model }`.\n\t * The `key` property is the model attribute key to convert from and to.\n\t * The `values` are the possible model attribute values. If `values` is not set, the model attribute value will be the same as the\n\t * view attribute value.\n\t * If `name` is set, the conversion will be set up only for model elements with the given name.\n\t *\n\t * The `definition.view` parameter specifies which view attribute should be converted from and to.\n\t * It can be a `{ key, value, [ name ] }` object or a `String`, which will be treated like `{ key: definition.view }`.\n\t * The `key` property is the view attribute key to convert from and to.\n\t * The `value` is the view attribute value to convert from and to. If `definition.value` is not set, the view attribute value will be\n\t * the same as the model attribute value.\n\t * If `key` is `'class'`, `value` can be a `String` or an array of `String`s.\n\t * If `key` is `'style'`, `value` is an object with key-value pairs.\n\t * In other cases, `value` is a `String`.\n\t * If `name` is set, the conversion will be set up only for model elements with the given name.\n\t * If `definition.model.values` is set, `definition.view` is an object that assigns values from `definition.model.values`\n\t * to `{ key, value, [ name ] }` objects.\n\t *\n\t * `definition.upcastAlso` specifies which other matching view elements should also be upcast to the given model configuration.\n\t * If `definition.model.values` is set, `definition.upcastAlso` should be an object assigning values from `definition.model.values`\n\t * to {@link module:engine/view/matcher~MatcherPattern}s or arrays of {@link module:engine/view/matcher~MatcherPattern}s.\n\t *\n\t * **Note:** `definition.model` and `definition.view` form should be mirrored, so the same types of parameters should\n\t * be given in both parameters.\n\t *\n\t * @param {Object} definition The converter definition.\n\t * @param {String|Object} definition.model The model attribute to convert from and to.\n\t * @param {String|Object} definition.view The view attribute to convert from and to.\n\t * @param {module:engine/view/matcher~MatcherPattern|Array.<module:engine/view/matcher~MatcherPattern>} [definition.upcastAlso]\n\t * Any view element matching `definition.upcastAlso` will also be converted to the given model attribute. `definition.upcastAlso`\n\t * is used only if `config.model.values` is specified.\n\t */\n\tattributeToAttribute( definition ) {\n\t\t// Set up downcast converter.\n\t\tthis.for( 'downcast' ).attributeToAttribute( definition );\n\n\t\t// Set up upcast converter.\n\t\tfor ( const { model, view } of _getAllUpcastDefinitions( definition ) ) {\n\t\t\tthis.for( 'upcast' )\n\t\t\t\t.attributeToAttribute( {\n\t\t\t\t\tview,\n\t\t\t\t\tmodel\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and caches conversion helpers for given dispatchers group.\n\t *\n\t * @private\n\t * @param {Object} options\n\t * @param {String} options.name Group name.\n\t * @param {Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher>} options.dispatchers\n\t * @param {Boolean} options.isDowncast\n\t */\n\t_createConversionHelpers( { name, dispatchers, isDowncast } ) {\n\t\tif ( this._helpers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Trying to register a group name that has already been registered.\n\t\t\t *\n\t\t\t * @error conversion-group-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'conversion-group-exists: Trying to register a group name that has already been registered.', this );\n\t\t}\n\n\t\tconst helpers = isDowncast ? new DowncastHelpers( dispatchers ) : new UpcastHelpers( dispatchers );\n\n\t\tthis._helpers.set( name, helpers );\n\t}\n}\n\n/**\n * Defines how the model should be converted from and to the view.\n *\n * @typedef {Object} module:engine/conversion/conversion~ConverterDefinition\n *\n * @property {*} [model] The model conversion definition. Describes the model element or model attribute to convert. This parameter differs\n * for different functions that accept `ConverterDefinition`. See the description of the function to learn how to set it.\n * @property {module:engine/view/elementdefinition~ElementDefinition|Object} view The definition of the view element to convert from and\n * to. If `model` describes multiple values, `view` is an object that assigns these values (`view` object keys) to view element definitions\n * (`view` object values).\n * @property {module:engine/view/matcher~MatcherPattern|Array.<module:engine/view/matcher~MatcherPattern>} [upcastAlso]\n * Any view element matching `upcastAlso` will also be converted to the model. If `model` describes multiple values, `upcastAlso`\n * is an object that assigns these values (`upcastAlso` object keys) to {@link module:engine/view/matcher~MatcherPattern}s\n * (`upcastAlso` object values).\n * @property {module:utils/priorities~PriorityString} [converterPriority] The converter priority.\n */\n\n// Helper function that creates a joint array out of an item passed in `definition.view` and items passed in\n// `definition.upcastAlso`.\n//\n// @param {module:engine/conversion/conversion~ConverterDefinition} definition\n// @returns {Array} Array containing view definitions.\nfunction* _getAllUpcastDefinitions( definition ) {\n\tif ( definition.model.values ) {\n\t\tfor ( const value of definition.model.values ) {\n\t\t\tconst model = { key: definition.model.key, value };\n\t\t\tconst view = definition.view[ value ];\n\t\t\tconst upcastAlso = definition.upcastAlso ? definition.upcastAlso[ value ] : undefined;\n\n\t\t\tyield* _getUpcastDefinition( model, view, upcastAlso );\n\t\t}\n\t} else {\n\t\tyield* _getUpcastDefinition( definition.model, definition.view, definition.upcastAlso );\n\t}\n}\n\nfunction* _getUpcastDefinition( model, view, upcastAlso ) {\n\tyield { model, view };\n\n\tif ( upcastAlso ) {\n\t\tupcastAlso = Array.isArray( upcastAlso ) ? upcastAlso : [ upcastAlso ];\n\n\t\tfor ( const upcastAlsoItem of upcastAlso ) {\n\t\t\tyield { model, view: upcastAlsoItem };\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/utils\n */\n\n/**\n * Returns attributes that should be preserved on the enter key.\n *\n * Filtering is realized based on `copyOnEnter` attribute property. Read more about attribute properties\n * {@link module:engine/model/schema~Schema#setAttributeProperties here}.\n *\n * @param {module:engine/model/schema~Schema} schema\n * @param {Iterable.<*>} allAttributes attributes to filter.\n * @returns {Iterable.<*>}\n */\nexport function* getCopyOnEnterAttributes( schema, allAttributes ) {\n\tfor ( const attribute of allAttributes ) {\n\t\tif ( attribute && schema.getAttributeProperties( attribute[ 0 ] ).copyOnEnter ) {\n\t\t\tyield attribute;\n\t\t}\n\t}\n}\n","import root from './_root.js';\n\n/** Built-in value references. */\nvar Symbol = root.Symbol;\n\nexport default Symbol;\n","import Symbol from './_Symbol.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the raw `toStringTag`.\n */\nfunction getRawTag(value) {\n var isOwn = hasOwnProperty.call(value, symToStringTag),\n tag = value[symToStringTag];\n\n try {\n value[symToStringTag] = undefined;\n var unmasked = true;\n } catch (e) {}\n\n var result = nativeObjectToString.call(value);\n if (unmasked) {\n if (isOwn) {\n value[symToStringTag] = tag;\n } else {\n delete value[symToStringTag];\n }\n }\n return result;\n}\n\nexport default getRawTag;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar nativeObjectToString = objectProto.toString;\n\n/**\n * Converts `value` to a string using `Object.prototype.toString`.\n *\n * @private\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n */\nfunction objectToString(value) {\n return nativeObjectToString.call(value);\n}\n\nexport default objectToString;\n","import Symbol from './_Symbol.js';\nimport getRawTag from './_getRawTag.js';\nimport objectToString from './_objectToString.js';\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]',\n undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\n\n/**\n * The base implementation of `getTag` without fallbacks for buggy environments.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nfunction baseGetTag(value) {\n if (value == null) {\n return value === undefined ? undefinedTag : nullTag;\n }\n return (symToStringTag && symToStringTag in Object(value))\n ? getRawTag(value)\n : objectToString(value);\n}\n\nexport default baseGetTag;\n","/**\n * Creates a unary function that invokes `func` with its argument transformed.\n *\n * @private\n * @param {Function} func The function to wrap.\n * @param {Function} transform The argument transform.\n * @returns {Function} Returns the new function.\n */\nfunction overArg(func, transform) {\n return function(arg) {\n return func(transform(arg));\n };\n}\n\nexport default overArg;\n","import overArg from './_overArg.js';\n\n/** Built-in value references. */\nvar getPrototype = overArg(Object.getPrototypeOf, Object);\n\nexport default getPrototype;\n","/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n return value != null && typeof value == 'object';\n}\n\nexport default isObjectLike;\n","import baseGetTag from './_baseGetTag.js';\nimport getPrototype from './_getPrototype.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to infer the `Object` constructor. */\nvar objectCtorString = funcToString.call(Object);\n\n/**\n * Checks if `value` is a plain object, that is, an object created by the\n * `Object` constructor or one with a `[[Prototype]]` of `null`.\n *\n * @static\n * @memberOf _\n * @since 0.8.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * _.isPlainObject(new Foo);\n * // => false\n *\n * _.isPlainObject([1, 2, 3]);\n * // => false\n *\n * _.isPlainObject({ 'x': 0, 'y': 0 });\n * // => true\n *\n * _.isPlainObject(Object.create(null));\n * // => true\n */\nfunction isPlainObject(value) {\n if (!isObjectLike(value) || baseGetTag(value) != objectTag) {\n return false;\n }\n var proto = getPrototype(value);\n if (proto === null) {\n return true;\n }\n var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;\n return typeof Ctor == 'function' && Ctor instanceof Ctor &&\n funcToString.call(Ctor) == objectCtorString;\n}\n\nexport default isPlainObject;\n","/**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\nfunction eq(value, other) {\n return value === other || (value !== value && other !== other);\n}\n\nexport default eq;\n","import eq from './eq.js';\n\n/**\n * Gets the index at which the `key` is found in `array` of key-value pairs.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {*} key The key to search for.\n * @returns {number} Returns the index of the matched value, else `-1`.\n */\nfunction assocIndexOf(array, key) {\n var length = array.length;\n while (length--) {\n if (eq(array[length][0], key)) {\n return length;\n }\n }\n return -1;\n}\n\nexport default assocIndexOf;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/** Used for built-in method references. */\nvar arrayProto = Array.prototype;\n\n/** Built-in value references. */\nvar splice = arrayProto.splice;\n\n/**\n * Removes `key` and its value from the list cache.\n *\n * @private\n * @name delete\n * @memberOf ListCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction listCacheDelete(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n return false;\n }\n var lastIndex = data.length - 1;\n if (index == lastIndex) {\n data.pop();\n } else {\n splice.call(data, index, 1);\n }\n --this.size;\n return true;\n}\n\nexport default listCacheDelete;\n","import listCacheClear from './_listCacheClear.js';\nimport listCacheDelete from './_listCacheDelete.js';\nimport listCacheGet from './_listCacheGet.js';\nimport listCacheHas from './_listCacheHas.js';\nimport listCacheSet from './_listCacheSet.js';\n\n/**\n * Creates an list cache object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction ListCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `ListCache`.\nListCache.prototype.clear = listCacheClear;\nListCache.prototype['delete'] = listCacheDelete;\nListCache.prototype.get = listCacheGet;\nListCache.prototype.has = listCacheHas;\nListCache.prototype.set = listCacheSet;\n\nexport default ListCache;\n","/**\n * Removes all key-value entries from the list cache.\n *\n * @private\n * @name clear\n * @memberOf ListCache\n */\nfunction listCacheClear() {\n this.__data__ = [];\n this.size = 0;\n}\n\nexport default listCacheClear;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Gets the list cache value for `key`.\n *\n * @private\n * @name get\n * @memberOf ListCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction listCacheGet(key) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n return index < 0 ? undefined : data[index][1];\n}\n\nexport default listCacheGet;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Checks if a list cache value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf ListCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction listCacheHas(key) {\n return assocIndexOf(this.__data__, key) > -1;\n}\n\nexport default listCacheHas;\n","import assocIndexOf from './_assocIndexOf.js';\n\n/**\n * Sets the list cache `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf ListCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the list cache instance.\n */\nfunction listCacheSet(key, value) {\n var data = this.__data__,\n index = assocIndexOf(data, key);\n\n if (index < 0) {\n ++this.size;\n data.push([key, value]);\n } else {\n data[index][1] = value;\n }\n return this;\n}\n\nexport default listCacheSet;\n","import coreJsData from './_coreJsData.js';\n\n/** Used to detect methods masquerading as native. */\nvar maskSrcKey = (function() {\n var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');\n return uid ? ('Symbol(src)_1.' + uid) : '';\n}());\n\n/**\n * Checks if `func` has its source masked.\n *\n * @private\n * @param {Function} func The function to check.\n * @returns {boolean} Returns `true` if `func` is masked, else `false`.\n */\nfunction isMasked(func) {\n return !!maskSrcKey && (maskSrcKey in func);\n}\n\nexport default isMasked;\n","/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n var type = typeof value;\n return value != null && (type == 'object' || type == 'function');\n}\n\nexport default isObject;\n","import baseGetTag from './_baseGetTag.js';\nimport isObject from './isObject.js';\n\n/** `Object#toString` result references. */\nvar asyncTag = '[object AsyncFunction]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n proxyTag = '[object Proxy]';\n\n/**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\nfunction isFunction(value) {\n if (!isObject(value)) {\n return false;\n }\n // The use of `Object#toString` avoids issues with the `typeof` operator\n // in Safari 9 which returns 'object' for typed arrays and other constructors.\n var tag = baseGetTag(value);\n return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n}\n\nexport default isFunction;\n","import root from './_root.js';\n\n/** Used to detect overreaching core-js shims. */\nvar coreJsData = root['__core-js_shared__'];\n\nexport default coreJsData;\n","/** Used for built-in method references. */\nvar funcProto = Function.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/**\n * Converts `func` to its source code.\n *\n * @private\n * @param {Function} func The function to convert.\n * @returns {string} Returns the source code.\n */\nfunction toSource(func) {\n if (func != null) {\n try {\n return funcToString.call(func);\n } catch (e) {}\n try {\n return (func + '');\n } catch (e) {}\n }\n return '';\n}\n\nexport default toSource;\n","import isFunction from './isFunction.js';\nimport isMasked from './_isMasked.js';\nimport isObject from './isObject.js';\nimport toSource from './_toSource.js';\n\n/**\n * Used to match `RegExp`\n * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).\n */\nvar reRegExpChar = /[\\\\^$.*+?()[\\]{}|]/g;\n\n/** Used to detect host constructors (Safari). */\nvar reIsHostCtor = /^\\[object .+?Constructor\\]$/;\n\n/** Used for built-in method references. */\nvar funcProto = Function.prototype,\n objectProto = Object.prototype;\n\n/** Used to resolve the decompiled source of functions. */\nvar funcToString = funcProto.toString;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Used to detect if a method is native. */\nvar reIsNative = RegExp('^' +\n funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\\\$&')\n .replace(/hasOwnProperty|(function).*?(?=\\\\\\()| for .+?(?=\\\\\\])/g, '$1.*?') + '$'\n);\n\n/**\n * The base implementation of `_.isNative` without bad shim checks.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n */\nfunction baseIsNative(value) {\n if (!isObject(value) || isMasked(value)) {\n return false;\n }\n var pattern = isFunction(value) ? reIsNative : reIsHostCtor;\n return pattern.test(toSource(value));\n}\n\nexport default baseIsNative;\n","import baseIsNative from './_baseIsNative.js';\nimport getValue from './_getValue.js';\n\n/**\n * Gets the native function at `key` of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {string} key The key of the method to get.\n * @returns {*} Returns the function if it's native, else `undefined`.\n */\nfunction getNative(object, key) {\n var value = getValue(object, key);\n return baseIsNative(value) ? value : undefined;\n}\n\nexport default getNative;\n","/**\n * Gets the value at `key` of `object`.\n *\n * @private\n * @param {Object} [object] The object to query.\n * @param {string} key The key of the property to get.\n * @returns {*} Returns the property value.\n */\nfunction getValue(object, key) {\n return object == null ? undefined : object[key];\n}\n\nexport default getValue;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Map = getNative(root, 'Map');\n\nexport default Map;\n","import getNative from './_getNative.js';\n\n/* Built-in method references that are verified to be native. */\nvar nativeCreate = getNative(Object, 'create');\n\nexport default nativeCreate;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Gets the hash value for `key`.\n *\n * @private\n * @name get\n * @memberOf Hash\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction hashGet(key) {\n var data = this.__data__;\n if (nativeCreate) {\n var result = data[key];\n return result === HASH_UNDEFINED ? undefined : result;\n }\n return hasOwnProperty.call(data, key) ? data[key] : undefined;\n}\n\nexport default hashGet;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Checks if a hash value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Hash\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction hashHas(key) {\n var data = this.__data__;\n return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);\n}\n\nexport default hashHas;\n","import hashClear from './_hashClear.js';\nimport hashDelete from './_hashDelete.js';\nimport hashGet from './_hashGet.js';\nimport hashHas from './_hashHas.js';\nimport hashSet from './_hashSet.js';\n\n/**\n * Creates a hash object.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Hash(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `Hash`.\nHash.prototype.clear = hashClear;\nHash.prototype['delete'] = hashDelete;\nHash.prototype.get = hashGet;\nHash.prototype.has = hashHas;\nHash.prototype.set = hashSet;\n\nexport default Hash;\n","import nativeCreate from './_nativeCreate.js';\n\n/**\n * Removes all key-value entries from the hash.\n *\n * @private\n * @name clear\n * @memberOf Hash\n */\nfunction hashClear() {\n this.__data__ = nativeCreate ? nativeCreate(null) : {};\n this.size = 0;\n}\n\nexport default hashClear;\n","/**\n * Removes `key` and its value from the hash.\n *\n * @private\n * @name delete\n * @memberOf Hash\n * @param {Object} hash The hash to modify.\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction hashDelete(key) {\n var result = this.has(key) && delete this.__data__[key];\n this.size -= result ? 1 : 0;\n return result;\n}\n\nexport default hashDelete;\n","import nativeCreate from './_nativeCreate.js';\n\n/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Sets the hash `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Hash\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the hash instance.\n */\nfunction hashSet(key, value) {\n var data = this.__data__;\n this.size += this.has(key) ? 0 : 1;\n data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;\n return this;\n}\n\nexport default hashSet;\n","import isKeyable from './_isKeyable.js';\n\n/**\n * Gets the data for `map`.\n *\n * @private\n * @param {Object} map The map to query.\n * @param {string} key The reference key.\n * @returns {*} Returns the map data.\n */\nfunction getMapData(map, key) {\n var data = map.__data__;\n return isKeyable(key)\n ? data[typeof key == 'string' ? 'string' : 'hash']\n : data.map;\n}\n\nexport default getMapData;\n","/**\n * Checks if `value` is suitable for use as unique object key.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is suitable, else `false`.\n */\nfunction isKeyable(value) {\n var type = typeof value;\n return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')\n ? (value !== '__proto__')\n : (value === null);\n}\n\nexport default isKeyable;\n","import mapCacheClear from './_mapCacheClear.js';\nimport mapCacheDelete from './_mapCacheDelete.js';\nimport mapCacheGet from './_mapCacheGet.js';\nimport mapCacheHas from './_mapCacheHas.js';\nimport mapCacheSet from './_mapCacheSet.js';\n\n/**\n * Creates a map cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction MapCache(entries) {\n var index = -1,\n length = entries == null ? 0 : entries.length;\n\n this.clear();\n while (++index < length) {\n var entry = entries[index];\n this.set(entry[0], entry[1]);\n }\n}\n\n// Add methods to `MapCache`.\nMapCache.prototype.clear = mapCacheClear;\nMapCache.prototype['delete'] = mapCacheDelete;\nMapCache.prototype.get = mapCacheGet;\nMapCache.prototype.has = mapCacheHas;\nMapCache.prototype.set = mapCacheSet;\n\nexport default MapCache;\n","import Hash from './_Hash.js';\nimport ListCache from './_ListCache.js';\nimport Map from './_Map.js';\n\n/**\n * Removes all key-value entries from the map.\n *\n * @private\n * @name clear\n * @memberOf MapCache\n */\nfunction mapCacheClear() {\n this.size = 0;\n this.__data__ = {\n 'hash': new Hash,\n 'map': new (Map || ListCache),\n 'string': new Hash\n };\n}\n\nexport default mapCacheClear;\n","import getMapData from './_getMapData.js';\n\n/**\n * Removes `key` and its value from the map.\n *\n * @private\n * @name delete\n * @memberOf MapCache\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction mapCacheDelete(key) {\n var result = getMapData(this, key)['delete'](key);\n this.size -= result ? 1 : 0;\n return result;\n}\n\nexport default mapCacheDelete;\n","import getMapData from './_getMapData.js';\n\n/**\n * Gets the map value for `key`.\n *\n * @private\n * @name get\n * @memberOf MapCache\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction mapCacheGet(key) {\n return getMapData(this, key).get(key);\n}\n\nexport default mapCacheGet;\n","import getMapData from './_getMapData.js';\n\n/**\n * Checks if a map value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf MapCache\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction mapCacheHas(key) {\n return getMapData(this, key).has(key);\n}\n\nexport default mapCacheHas;\n","import getMapData from './_getMapData.js';\n\n/**\n * Sets the map `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf MapCache\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the map cache instance.\n */\nfunction mapCacheSet(key, value) {\n var data = getMapData(this, key),\n size = data.size;\n\n data.set(key, value);\n this.size += data.size == size ? 0 : 1;\n return this;\n}\n\nexport default mapCacheSet;\n","import ListCache from './_ListCache.js';\nimport stackClear from './_stackClear.js';\nimport stackDelete from './_stackDelete.js';\nimport stackGet from './_stackGet.js';\nimport stackHas from './_stackHas.js';\nimport stackSet from './_stackSet.js';\n\n/**\n * Creates a stack cache object to store key-value pairs.\n *\n * @private\n * @constructor\n * @param {Array} [entries] The key-value pairs to cache.\n */\nfunction Stack(entries) {\n var data = this.__data__ = new ListCache(entries);\n this.size = data.size;\n}\n\n// Add methods to `Stack`.\nStack.prototype.clear = stackClear;\nStack.prototype['delete'] = stackDelete;\nStack.prototype.get = stackGet;\nStack.prototype.has = stackHas;\nStack.prototype.set = stackSet;\n\nexport default Stack;\n","import ListCache from './_ListCache.js';\n\n/**\n * Removes all key-value entries from the stack.\n *\n * @private\n * @name clear\n * @memberOf Stack\n */\nfunction stackClear() {\n this.__data__ = new ListCache;\n this.size = 0;\n}\n\nexport default stackClear;\n","/**\n * Removes `key` and its value from the stack.\n *\n * @private\n * @name delete\n * @memberOf Stack\n * @param {string} key The key of the value to remove.\n * @returns {boolean} Returns `true` if the entry was removed, else `false`.\n */\nfunction stackDelete(key) {\n var data = this.__data__,\n result = data['delete'](key);\n\n this.size = data.size;\n return result;\n}\n\nexport default stackDelete;\n","/**\n * Gets the stack value for `key`.\n *\n * @private\n * @name get\n * @memberOf Stack\n * @param {string} key The key of the value to get.\n * @returns {*} Returns the entry value.\n */\nfunction stackGet(key) {\n return this.__data__.get(key);\n}\n\nexport default stackGet;\n","/**\n * Checks if a stack value for `key` exists.\n *\n * @private\n * @name has\n * @memberOf Stack\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction stackHas(key) {\n return this.__data__.has(key);\n}\n\nexport default stackHas;\n","import ListCache from './_ListCache.js';\nimport Map from './_Map.js';\nimport MapCache from './_MapCache.js';\n\n/** Used as the size to enable large array optimizations. */\nvar LARGE_ARRAY_SIZE = 200;\n\n/**\n * Sets the stack `key` to `value`.\n *\n * @private\n * @name set\n * @memberOf Stack\n * @param {string} key The key of the value to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns the stack cache instance.\n */\nfunction stackSet(key, value) {\n var data = this.__data__;\n if (data instanceof ListCache) {\n var pairs = data.__data__;\n if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {\n pairs.push([key, value]);\n this.size = ++data.size;\n return this;\n }\n data = this.__data__ = new MapCache(pairs);\n }\n data.set(key, value);\n this.size = data.size;\n return this;\n}\n\nexport default stackSet;\n","import getNative from './_getNative.js';\n\nvar defineProperty = (function() {\n try {\n var func = getNative(Object, 'defineProperty');\n func({}, '', {});\n return func;\n } catch (e) {}\n}());\n\nexport default defineProperty;\n","import defineProperty from './_defineProperty.js';\n\n/**\n * The base implementation of `assignValue` and `assignMergeValue` without\n * value checks.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction baseAssignValue(object, key, value) {\n if (key == '__proto__' && defineProperty) {\n defineProperty(object, key, {\n 'configurable': true,\n 'enumerable': true,\n 'value': value,\n 'writable': true\n });\n } else {\n object[key] = value;\n }\n}\n\nexport default baseAssignValue;\n","import baseAssignValue from './_baseAssignValue.js';\nimport eq from './eq.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Assigns `value` to `key` of `object` if the existing value is not equivalent\n * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * for equality comparisons.\n *\n * @private\n * @param {Object} object The object to modify.\n * @param {string} key The key of the property to assign.\n * @param {*} value The value to assign.\n */\nfunction assignValue(object, key, value) {\n var objValue = object[key];\n if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||\n (value === undefined && !(key in object))) {\n baseAssignValue(object, key, value);\n }\n}\n\nexport default assignValue;\n","import assignValue from './_assignValue.js';\nimport baseAssignValue from './_baseAssignValue.js';\n\n/**\n * Copies properties of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy properties from.\n * @param {Array} props The property identifiers to copy.\n * @param {Object} [object={}] The object to copy properties to.\n * @param {Function} [customizer] The function to customize copied values.\n * @returns {Object} Returns `object`.\n */\nfunction copyObject(source, props, object, customizer) {\n var isNew = !object;\n object || (object = {});\n\n var index = -1,\n length = props.length;\n\n while (++index < length) {\n var key = props[index];\n\n var newValue = customizer\n ? customizer(object[key], source[key], key, object, source)\n : undefined;\n\n if (newValue === undefined) {\n newValue = source[key];\n }\n if (isNew) {\n baseAssignValue(object, key, newValue);\n } else {\n assignValue(object, key, newValue);\n }\n }\n return object;\n}\n\nexport default copyObject;\n","import baseGetTag from './_baseGetTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]';\n\n/**\n * The base implementation of `_.isArguments`.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n */\nfunction baseIsArguments(value) {\n return isObjectLike(value) && baseGetTag(value) == argsTag;\n}\n\nexport default baseIsArguments;\n","import baseIsArguments from './_baseIsArguments.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n * else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\nvar isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n !propertyIsEnumerable.call(value, 'callee');\n};\n\nexport default isArguments;\n","/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\nexport default isArray;\n","/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/** Used to detect unsigned integer values. */\nvar reIsUint = /^(?:0|[1-9]\\d*)$/;\n\n/**\n * Checks if `value` is a valid array-like index.\n *\n * @private\n * @param {*} value The value to check.\n * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.\n * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.\n */\nfunction isIndex(value, length) {\n var type = typeof value;\n length = length == null ? MAX_SAFE_INTEGER : length;\n\n return !!length &&\n (type == 'number' ||\n (type != 'symbol' && reIsUint.test(value))) &&\n (value > -1 && value % 1 == 0 && value < length);\n}\n\nexport default isIndex;\n","/** Used as references for various `Number` constants. */\nvar MAX_SAFE_INTEGER = 9007199254740991;\n\n/**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\nfunction isLength(value) {\n return typeof value == 'number' &&\n value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n}\n\nexport default isLength;\n","import baseGetTag from './_baseGetTag.js';\nimport isLength from './isLength.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values of typed arrays. */\nvar typedArrayTags = {};\ntypedArrayTags[float32Tag] = typedArrayTags[float64Tag] =\ntypedArrayTags[int8Tag] = typedArrayTags[int16Tag] =\ntypedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =\ntypedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =\ntypedArrayTags[uint32Tag] = true;\ntypedArrayTags[argsTag] = typedArrayTags[arrayTag] =\ntypedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =\ntypedArrayTags[dataViewTag] = typedArrayTags[dateTag] =\ntypedArrayTags[errorTag] = typedArrayTags[funcTag] =\ntypedArrayTags[mapTag] = typedArrayTags[numberTag] =\ntypedArrayTags[objectTag] = typedArrayTags[regexpTag] =\ntypedArrayTags[setTag] = typedArrayTags[stringTag] =\ntypedArrayTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.isTypedArray` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n */\nfunction baseIsTypedArray(value) {\n return isObjectLike(value) &&\n isLength(value.length) && !!typedArrayTags[baseGetTag(value)];\n}\n\nexport default baseIsTypedArray;\n","/**\n * The base implementation of `_.unary` without support for storing metadata.\n *\n * @private\n * @param {Function} func The function to cap arguments for.\n * @returns {Function} Returns the new capped function.\n */\nfunction baseUnary(func) {\n return function(value) {\n return func(value);\n };\n}\n\nexport default baseUnary;\n","import baseIsTypedArray from './_baseIsTypedArray.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;\n\n/**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\nvar isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\nexport default isTypedArray;\n","import baseTimes from './_baseTimes.js';\nimport isArguments from './isArguments.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isIndex from './_isIndex.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Creates an array of the enumerable property names of the array-like `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @param {boolean} inherited Specify returning inherited property names.\n * @returns {Array} Returns the array of property names.\n */\nfunction arrayLikeKeys(value, inherited) {\n var isArr = isArray(value),\n isArg = !isArr && isArguments(value),\n isBuff = !isArr && !isArg && isBuffer(value),\n isType = !isArr && !isArg && !isBuff && isTypedArray(value),\n skipIndexes = isArr || isArg || isBuff || isType,\n result = skipIndexes ? baseTimes(value.length, String) : [],\n length = result.length;\n\n for (var key in value) {\n if ((inherited || hasOwnProperty.call(value, key)) &&\n !(skipIndexes && (\n // Safari 9 has enumerable `arguments.length` in strict mode.\n key == 'length' ||\n // Node.js 0.10 has enumerable non-index properties on buffers.\n (isBuff && (key == 'offset' || key == 'parent')) ||\n // PhantomJS 2 has enumerable non-index properties on typed arrays.\n (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||\n // Skip index properties.\n isIndex(key, length)\n ))) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default arrayLikeKeys;\n","/**\n * The base implementation of `_.times` without support for iteratee shorthands\n * or max array length checks.\n *\n * @private\n * @param {number} n The number of times to invoke `iteratee`.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the array of results.\n */\nfunction baseTimes(n, iteratee) {\n var index = -1,\n result = Array(n);\n\n while (++index < n) {\n result[index] = iteratee(index);\n }\n return result;\n}\n\nexport default baseTimes;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Checks if `value` is likely a prototype object.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.\n */\nfunction isPrototype(value) {\n var Ctor = value && value.constructor,\n proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;\n\n return value === proto;\n}\n\nexport default isPrototype;\n","import overArg from './_overArg.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeKeys = overArg(Object.keys, Object);\n\nexport default nativeKeys;\n","import isPrototype from './_isPrototype.js';\nimport nativeKeys from './_nativeKeys.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeys(object) {\n if (!isPrototype(object)) {\n return nativeKeys(object);\n }\n var result = [];\n for (var key in Object(object)) {\n if (hasOwnProperty.call(object, key) && key != 'constructor') {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default baseKeys;\n","import isFunction from './isFunction.js';\nimport isLength from './isLength.js';\n\n/**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\nfunction isArrayLike(value) {\n return value != null && isLength(value.length) && !isFunction(value);\n}\n\nexport default isArrayLike;\n","import arrayLikeKeys from './_arrayLikeKeys.js';\nimport baseKeys from './_baseKeys.js';\nimport isArrayLike from './isArrayLike.js';\n\n/**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\nfunction keys(object) {\n return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n}\n\nexport default keys;\n","import isObject from './isObject.js';\nimport isPrototype from './_isPrototype.js';\nimport nativeKeysIn from './_nativeKeysIn.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction baseKeysIn(object) {\n if (!isObject(object)) {\n return nativeKeysIn(object);\n }\n var isProto = isPrototype(object),\n result = [];\n\n for (var key in object) {\n if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default baseKeysIn;\n","/**\n * This function is like\n * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * except that it includes inherited enumerable properties.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n */\nfunction nativeKeysIn(object) {\n var result = [];\n if (object != null) {\n for (var key in Object(object)) {\n result.push(key);\n }\n }\n return result;\n}\n\nexport default nativeKeysIn;\n","import arrayLikeKeys from './_arrayLikeKeys.js';\nimport baseKeysIn from './_baseKeysIn.js';\nimport isArrayLike from './isArrayLike.js';\n\n/**\n * Creates an array of the own and inherited enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keysIn(new Foo);\n * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n */\nfunction keysIn(object) {\n return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n}\n\nexport default keysIn;\n","/**\n * This method returns a new empty array.\n *\n * @static\n * @memberOf _\n * @since 4.13.0\n * @category Util\n * @returns {Array} Returns the new empty array.\n * @example\n *\n * var arrays = _.times(2, _.stubArray);\n *\n * console.log(arrays);\n * // => [[], []]\n *\n * console.log(arrays[0] === arrays[1]);\n * // => false\n */\nfunction stubArray() {\n return [];\n}\n\nexport default stubArray;\n","import arrayFilter from './_arrayFilter.js';\nimport stubArray from './stubArray.js';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Built-in value references. */\nvar propertyIsEnumerable = objectProto.propertyIsEnumerable;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbols = !nativeGetSymbols ? stubArray : function(object) {\n if (object == null) {\n return [];\n }\n object = Object(object);\n return arrayFilter(nativeGetSymbols(object), function(symbol) {\n return propertyIsEnumerable.call(object, symbol);\n });\n};\n\nexport default getSymbols;\n","/**\n * A specialized version of `_.filter` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {Array} Returns the new filtered array.\n */\nfunction arrayFilter(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length,\n resIndex = 0,\n result = [];\n\n while (++index < length) {\n var value = array[index];\n if (predicate(value, index, array)) {\n result[resIndex++] = value;\n }\n }\n return result;\n}\n\nexport default arrayFilter;\n","/**\n * Appends the elements of `values` to `array`.\n *\n * @private\n * @param {Array} array The array to modify.\n * @param {Array} values The values to append.\n * @returns {Array} Returns `array`.\n */\nfunction arrayPush(array, values) {\n var index = -1,\n length = values.length,\n offset = array.length;\n\n while (++index < length) {\n array[offset + index] = values[index];\n }\n return array;\n}\n\nexport default arrayPush;\n","import arrayPush from './_arrayPush.js';\nimport getPrototype from './_getPrototype.js';\nimport getSymbols from './_getSymbols.js';\nimport stubArray from './stubArray.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeGetSymbols = Object.getOwnPropertySymbols;\n\n/**\n * Creates an array of the own and inherited enumerable symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of symbols.\n */\nvar getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {\n var result = [];\n while (object) {\n arrayPush(result, getSymbols(object));\n object = getPrototype(object);\n }\n return result;\n};\n\nexport default getSymbolsIn;\n","import arrayPush from './_arrayPush.js';\nimport isArray from './isArray.js';\n\n/**\n * The base implementation of `getAllKeys` and `getAllKeysIn` which uses\n * `keysFunc` and `symbolsFunc` to get the enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @param {Function} keysFunc The function to get the keys of `object`.\n * @param {Function} symbolsFunc The function to get the symbols of `object`.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction baseGetAllKeys(object, keysFunc, symbolsFunc) {\n var result = keysFunc(object);\n return isArray(object) ? result : arrayPush(result, symbolsFunc(object));\n}\n\nexport default baseGetAllKeys;\n","import baseGetAllKeys from './_baseGetAllKeys.js';\nimport getSymbols from './_getSymbols.js';\nimport keys from './keys.js';\n\n/**\n * Creates an array of own enumerable property names and symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeys(object) {\n return baseGetAllKeys(object, keys, getSymbols);\n}\n\nexport default getAllKeys;\n","import baseGetAllKeys from './_baseGetAllKeys.js';\nimport getSymbolsIn from './_getSymbolsIn.js';\nimport keysIn from './keysIn.js';\n\n/**\n * Creates an array of own and inherited enumerable property names and\n * symbols of `object`.\n *\n * @private\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names and symbols.\n */\nfunction getAllKeysIn(object) {\n return baseGetAllKeys(object, keysIn, getSymbolsIn);\n}\n\nexport default getAllKeysIn;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar DataView = getNative(root, 'DataView');\n\nexport default DataView;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Promise = getNative(root, 'Promise');\n\nexport default Promise;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar Set = getNative(root, 'Set');\n\nexport default Set;\n","import getNative from './_getNative.js';\nimport root from './_root.js';\n\n/* Built-in method references that are verified to be native. */\nvar WeakMap = getNative(root, 'WeakMap');\n\nexport default WeakMap;\n","import DataView from './_DataView.js';\nimport Map from './_Map.js';\nimport Promise from './_Promise.js';\nimport Set from './_Set.js';\nimport WeakMap from './_WeakMap.js';\nimport baseGetTag from './_baseGetTag.js';\nimport toSource from './_toSource.js';\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]',\n objectTag = '[object Object]',\n promiseTag = '[object Promise]',\n setTag = '[object Set]',\n weakMapTag = '[object WeakMap]';\n\nvar dataViewTag = '[object DataView]';\n\n/** Used to detect maps, sets, and weakmaps. */\nvar dataViewCtorString = toSource(DataView),\n mapCtorString = toSource(Map),\n promiseCtorString = toSource(Promise),\n setCtorString = toSource(Set),\n weakMapCtorString = toSource(WeakMap);\n\n/**\n * Gets the `toStringTag` of `value`.\n *\n * @private\n * @param {*} value The value to query.\n * @returns {string} Returns the `toStringTag`.\n */\nvar getTag = baseGetTag;\n\n// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.\nif ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||\n (Map && getTag(new Map) != mapTag) ||\n (Promise && getTag(Promise.resolve()) != promiseTag) ||\n (Set && getTag(new Set) != setTag) ||\n (WeakMap && getTag(new WeakMap) != weakMapTag)) {\n getTag = function(value) {\n var result = baseGetTag(value),\n Ctor = result == objectTag ? value.constructor : undefined,\n ctorString = Ctor ? toSource(Ctor) : '';\n\n if (ctorString) {\n switch (ctorString) {\n case dataViewCtorString: return dataViewTag;\n case mapCtorString: return mapTag;\n case promiseCtorString: return promiseTag;\n case setCtorString: return setTag;\n case weakMapCtorString: return weakMapTag;\n }\n }\n return result;\n };\n}\n\nexport default getTag;\n","/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * Initializes an array clone.\n *\n * @private\n * @param {Array} array The array to clone.\n * @returns {Array} Returns the initialized clone.\n */\nfunction initCloneArray(array) {\n var length = array.length,\n result = new array.constructor(length);\n\n // Add properties assigned by `RegExp#exec`.\n if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {\n result.index = array.index;\n result.input = array.input;\n }\n return result;\n}\n\nexport default initCloneArray;\n","import root from './_root.js';\n\n/** Built-in value references. */\nvar Uint8Array = root.Uint8Array;\n\nexport default Uint8Array;\n","import Uint8Array from './_Uint8Array.js';\n\n/**\n * Creates a clone of `arrayBuffer`.\n *\n * @private\n * @param {ArrayBuffer} arrayBuffer The array buffer to clone.\n * @returns {ArrayBuffer} Returns the cloned array buffer.\n */\nfunction cloneArrayBuffer(arrayBuffer) {\n var result = new arrayBuffer.constructor(arrayBuffer.byteLength);\n new Uint8Array(result).set(new Uint8Array(arrayBuffer));\n return result;\n}\n\nexport default cloneArrayBuffer;\n","/** Used to match `RegExp` flags from their coerced string values. */\nvar reFlags = /\\w*$/;\n\n/**\n * Creates a clone of `regexp`.\n *\n * @private\n * @param {Object} regexp The regexp to clone.\n * @returns {Object} Returns the cloned regexp.\n */\nfunction cloneRegExp(regexp) {\n var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));\n result.lastIndex = regexp.lastIndex;\n return result;\n}\n\nexport default cloneRegExp;\n","import Symbol from './_Symbol.js';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * Creates a clone of the `symbol` object.\n *\n * @private\n * @param {Object} symbol The symbol object to clone.\n * @returns {Object} Returns the cloned symbol object.\n */\nfunction cloneSymbol(symbol) {\n return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};\n}\n\nexport default cloneSymbol;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\nimport cloneDataView from './_cloneDataView.js';\nimport cloneRegExp from './_cloneRegExp.js';\nimport cloneSymbol from './_cloneSymbol.js';\nimport cloneTypedArray from './_cloneTypedArray.js';\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/**\n * Initializes an object clone based on its `toStringTag`.\n *\n * **Note:** This function only supports cloning values with tags of\n * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.\n *\n * @private\n * @param {Object} object The object to clone.\n * @param {string} tag The `toStringTag` of the object to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneByTag(object, tag, isDeep) {\n var Ctor = object.constructor;\n switch (tag) {\n case arrayBufferTag:\n return cloneArrayBuffer(object);\n\n case boolTag:\n case dateTag:\n return new Ctor(+object);\n\n case dataViewTag:\n return cloneDataView(object, isDeep);\n\n case float32Tag: case float64Tag:\n case int8Tag: case int16Tag: case int32Tag:\n case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:\n return cloneTypedArray(object, isDeep);\n\n case mapTag:\n return new Ctor;\n\n case numberTag:\n case stringTag:\n return new Ctor(object);\n\n case regexpTag:\n return cloneRegExp(object);\n\n case setTag:\n return new Ctor;\n\n case symbolTag:\n return cloneSymbol(object);\n }\n}\n\nexport default initCloneByTag;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\n\n/**\n * Creates a clone of `dataView`.\n *\n * @private\n * @param {Object} dataView The data view to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned data view.\n */\nfunction cloneDataView(dataView, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;\n return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);\n}\n\nexport default cloneDataView;\n","import cloneArrayBuffer from './_cloneArrayBuffer.js';\n\n/**\n * Creates a clone of `typedArray`.\n *\n * @private\n * @param {Object} typedArray The typed array to clone.\n * @param {boolean} [isDeep] Specify a deep clone.\n * @returns {Object} Returns the cloned typed array.\n */\nfunction cloneTypedArray(typedArray, isDeep) {\n var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;\n return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);\n}\n\nexport default cloneTypedArray;\n","import isObject from './isObject.js';\n\n/** Built-in value references. */\nvar objectCreate = Object.create;\n\n/**\n * The base implementation of `_.create` without support for assigning\n * properties to the created object.\n *\n * @private\n * @param {Object} proto The object to inherit from.\n * @returns {Object} Returns the new object.\n */\nvar baseCreate = (function() {\n function object() {}\n return function(proto) {\n if (!isObject(proto)) {\n return {};\n }\n if (objectCreate) {\n return objectCreate(proto);\n }\n object.prototype = proto;\n var result = new object;\n object.prototype = undefined;\n return result;\n };\n}());\n\nexport default baseCreate;\n","import baseIsMap from './_baseIsMap.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsMap = nodeUtil && nodeUtil.isMap;\n\n/**\n * Checks if `value` is classified as a `Map` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n * @example\n *\n * _.isMap(new Map);\n * // => true\n *\n * _.isMap(new WeakMap);\n * // => false\n */\nvar isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\nexport default isMap;\n","import getTag from './_getTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar mapTag = '[object Map]';\n\n/**\n * The base implementation of `_.isMap` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n */\nfunction baseIsMap(value) {\n return isObjectLike(value) && getTag(value) == mapTag;\n}\n\nexport default baseIsMap;\n","import baseIsSet from './_baseIsSet.js';\nimport baseUnary from './_baseUnary.js';\nimport nodeUtil from './_nodeUtil.js';\n\n/* Node.js helper references. */\nvar nodeIsSet = nodeUtil && nodeUtil.isSet;\n\n/**\n * Checks if `value` is classified as a `Set` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n * @example\n *\n * _.isSet(new Set);\n * // => true\n *\n * _.isSet(new WeakSet);\n * // => false\n */\nvar isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\nexport default isSet;\n","import getTag from './_getTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar setTag = '[object Set]';\n\n/**\n * The base implementation of `_.isSet` without Node.js optimizations.\n *\n * @private\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n */\nfunction baseIsSet(value) {\n return isObjectLike(value) && getTag(value) == setTag;\n}\n\nexport default baseIsSet;\n","import Stack from './_Stack.js';\nimport arrayEach from './_arrayEach.js';\nimport assignValue from './_assignValue.js';\nimport baseAssign from './_baseAssign.js';\nimport baseAssignIn from './_baseAssignIn.js';\nimport cloneBuffer from './_cloneBuffer.js';\nimport copyArray from './_copyArray.js';\nimport copySymbols from './_copySymbols.js';\nimport copySymbolsIn from './_copySymbolsIn.js';\nimport getAllKeys from './_getAllKeys.js';\nimport getAllKeysIn from './_getAllKeysIn.js';\nimport getTag from './_getTag.js';\nimport initCloneArray from './_initCloneArray.js';\nimport initCloneByTag from './_initCloneByTag.js';\nimport initCloneObject from './_initCloneObject.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isMap from './isMap.js';\nimport isObject from './isObject.js';\nimport isSet from './isSet.js';\nimport keys from './keys.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_FLAT_FLAG = 2,\n CLONE_SYMBOLS_FLAG = 4;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n funcTag = '[object Function]',\n genTag = '[object GeneratorFunction]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n objectTag = '[object Object]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]',\n weakMapTag = '[object WeakMap]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]',\n float32Tag = '[object Float32Array]',\n float64Tag = '[object Float64Array]',\n int8Tag = '[object Int8Array]',\n int16Tag = '[object Int16Array]',\n int32Tag = '[object Int32Array]',\n uint8Tag = '[object Uint8Array]',\n uint8ClampedTag = '[object Uint8ClampedArray]',\n uint16Tag = '[object Uint16Array]',\n uint32Tag = '[object Uint32Array]';\n\n/** Used to identify `toStringTag` values supported by `_.clone`. */\nvar cloneableTags = {};\ncloneableTags[argsTag] = cloneableTags[arrayTag] =\ncloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =\ncloneableTags[boolTag] = cloneableTags[dateTag] =\ncloneableTags[float32Tag] = cloneableTags[float64Tag] =\ncloneableTags[int8Tag] = cloneableTags[int16Tag] =\ncloneableTags[int32Tag] = cloneableTags[mapTag] =\ncloneableTags[numberTag] = cloneableTags[objectTag] =\ncloneableTags[regexpTag] = cloneableTags[setTag] =\ncloneableTags[stringTag] = cloneableTags[symbolTag] =\ncloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =\ncloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;\ncloneableTags[errorTag] = cloneableTags[funcTag] =\ncloneableTags[weakMapTag] = false;\n\n/**\n * The base implementation of `_.clone` and `_.cloneDeep` which tracks\n * traversed objects.\n *\n * @private\n * @param {*} value The value to clone.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Deep clone\n * 2 - Flatten inherited properties\n * 4 - Clone symbols\n * @param {Function} [customizer] The function to customize cloning.\n * @param {string} [key] The key of `value`.\n * @param {Object} [object] The parent object of `value`.\n * @param {Object} [stack] Tracks traversed objects and their clone counterparts.\n * @returns {*} Returns the cloned value.\n */\nfunction baseClone(value, bitmask, customizer, key, object, stack) {\n var result,\n isDeep = bitmask & CLONE_DEEP_FLAG,\n isFlat = bitmask & CLONE_FLAT_FLAG,\n isFull = bitmask & CLONE_SYMBOLS_FLAG;\n\n if (customizer) {\n result = object ? customizer(value, key, object, stack) : customizer(value);\n }\n if (result !== undefined) {\n return result;\n }\n if (!isObject(value)) {\n return value;\n }\n var isArr = isArray(value);\n if (isArr) {\n result = initCloneArray(value);\n if (!isDeep) {\n return copyArray(value, result);\n }\n } else {\n var tag = getTag(value),\n isFunc = tag == funcTag || tag == genTag;\n\n if (isBuffer(value)) {\n return cloneBuffer(value, isDeep);\n }\n if (tag == objectTag || tag == argsTag || (isFunc && !object)) {\n result = (isFlat || isFunc) ? {} : initCloneObject(value);\n if (!isDeep) {\n return isFlat\n ? copySymbolsIn(value, baseAssignIn(result, value))\n : copySymbols(value, baseAssign(result, value));\n }\n } else {\n if (!cloneableTags[tag]) {\n return object ? value : {};\n }\n result = initCloneByTag(value, tag, isDeep);\n }\n }\n // Check for circular references and return its corresponding clone.\n stack || (stack = new Stack);\n var stacked = stack.get(value);\n if (stacked) {\n return stacked;\n }\n stack.set(value, result);\n\n if (isSet(value)) {\n value.forEach(function(subValue) {\n result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));\n });\n } else if (isMap(value)) {\n value.forEach(function(subValue, key) {\n result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n }\n\n var keysFunc = isFull\n ? (isFlat ? getAllKeysIn : getAllKeys)\n : (isFlat ? keysIn : keys);\n\n var props = isArr ? undefined : keysFunc(value);\n arrayEach(props || value, function(subValue, key) {\n if (props) {\n key = subValue;\n subValue = value[key];\n }\n // Recursively populate clone (susceptible to call stack limits).\n assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));\n });\n return result;\n}\n\nexport default baseClone;\n","/**\n * Copies the values of `source` to `array`.\n *\n * @private\n * @param {Array} source The array to copy values from.\n * @param {Array} [array=[]] The array to copy values to.\n * @returns {Array} Returns `array`.\n */\nfunction copyArray(source, array) {\n var index = -1,\n length = source.length;\n\n array || (array = Array(length));\n while (++index < length) {\n array[index] = source[index];\n }\n return array;\n}\n\nexport default copyArray;\n","import baseCreate from './_baseCreate.js';\nimport getPrototype from './_getPrototype.js';\nimport isPrototype from './_isPrototype.js';\n\n/**\n * Initializes an object clone.\n *\n * @private\n * @param {Object} object The object to clone.\n * @returns {Object} Returns the initialized clone.\n */\nfunction initCloneObject(object) {\n return (typeof object.constructor == 'function' && !isPrototype(object))\n ? baseCreate(getPrototype(object))\n : {};\n}\n\nexport default initCloneObject;\n","import copyObject from './_copyObject.js';\nimport getSymbolsIn from './_getSymbolsIn.js';\n\n/**\n * Copies own and inherited symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbolsIn(source, object) {\n return copyObject(source, getSymbolsIn(source), object);\n}\n\nexport default copySymbolsIn;\n","import copyObject from './_copyObject.js';\nimport keysIn from './keysIn.js';\n\n/**\n * The base implementation of `_.assignIn` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssignIn(object, source) {\n return object && copyObject(source, keysIn(source), object);\n}\n\nexport default baseAssignIn;\n","import copyObject from './_copyObject.js';\nimport getSymbols from './_getSymbols.js';\n\n/**\n * Copies own symbols of `source` to `object`.\n *\n * @private\n * @param {Object} source The object to copy symbols from.\n * @param {Object} [object={}] The object to copy symbols to.\n * @returns {Object} Returns `object`.\n */\nfunction copySymbols(source, object) {\n return copyObject(source, getSymbols(source), object);\n}\n\nexport default copySymbols;\n","import copyObject from './_copyObject.js';\nimport keys from './keys.js';\n\n/**\n * The base implementation of `_.assign` without support for multiple sources\n * or `customizer` functions.\n *\n * @private\n * @param {Object} object The destination object.\n * @param {Object} source The source object.\n * @returns {Object} Returns `object`.\n */\nfunction baseAssign(object, source) {\n return object && copyObject(source, keys(source), object);\n}\n\nexport default baseAssign;\n","/**\n * A specialized version of `_.forEach` for arrays without support for\n * iteratee shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns `array`.\n */\nfunction arrayEach(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (iteratee(array[index], index, array) === false) {\n break;\n }\n }\n return array;\n}\n\nexport default arrayEach;\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * This method is like `_.cloneWith` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the deep cloned value.\n * @see _.cloneWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(true);\n * }\n * }\n *\n * var el = _.cloneDeepWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 20\n */\nfunction cloneDeepWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);\n}\n\nexport default cloneDeepWith;\n","import isObjectLike from './isObjectLike.js';\nimport isPlainObject from './isPlainObject.js';\n\n/**\n * Checks if `value` is likely a DOM element.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.\n * @example\n *\n * _.isElement(document.body);\n * // => true\n *\n * _.isElement('<body>');\n * // => false\n */\nfunction isElement(value) {\n return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);\n}\n\nexport default isElement;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/config\n */\n\nimport { isPlainObject, isElement, cloneDeepWith } from 'lodash-es';\n\n/**\n * Handles a configuration dictionary.\n */\nexport default class Config {\n\t/**\n\t * Creates an instance of the {@link ~Config} class.\n\t *\n\t * @param {Object} [configurations] The initial configurations to be set. Usually, provided by the user.\n\t * @param {Object} [defaultConfigurations] The default configurations. Usually, provided by the system.\n\t */\n\tconstructor( configurations, defaultConfigurations ) {\n\t\t/**\n\t\t * Store for the whole configuration.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {};\n\n\t\t// Set default configuration.\n\t\tif ( defaultConfigurations ) {\n\t\t\tthis.define( defaultConfigurations );\n\t\t}\n\n\t\t// Set initial configuration.\n\t\tif ( configurations ) {\n\t\t\tthis._setObjectToTarget( this._config, configurations );\n\t\t}\n\t}\n\n\t/**\n\t * Set configuration values.\n\t *\n\t * It accepts both a name/value pair or an object, which properties and values will be used to set\n\t * configurations.\n\t *\n\t * It also accepts setting a \"deep configuration\" by using dots in the name. For example, `'resize.width'` sets\n\t * the value for the `width` configuration in the `resize` subset.\n\t *\n\t *\t\tconfig.set( 'width', 500 );\n\t *\t\tconfig.set( 'toolbar.collapsed', true );\n\t *\n\t *\t\t// Equivalent to:\n\t *\t\tconfig.set( {\n\t *\t\t\twidth: 500\n\t *\t\t\ttoolbar: {\n\t *\t\t\t\tcollapsed: true\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Passing an object as the value will amend the configuration, not replace it.\n\t *\n\t *\t\tconfig.set( 'toolbar', {\n\t *\t\t\tcollapsed: true,\n\t *\t\t} );\n\t *\n\t *\t\tconfig.set( 'toolbar', {\n\t *\t\t\tcolor: 'red',\n\t *\t\t} );\n\t *\n\t *\t\tconfig.get( 'toolbar.collapsed' ); // true\n\t *\t\tconfig.get( 'toolbar.color' ); // 'red'\n\t *\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t */\n\tset( name, value ) {\n\t\tthis._setToTarget( this._config, name, value );\n\t}\n\n\t/**\n\t * Does exactly the same as {@link #set} with one exception – passed configuration extends\n\t * existing one, but does not overwrite already defined values.\n\t *\n\t * This method is supposed to be called by plugin developers to setup plugin's configurations. It would be\n\t * rarely used for other needs.\n\t *\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t */\n\tdefine( name, value ) {\n\t\tconst isDefine = true;\n\n\t\tthis._setToTarget( this._config, name, value, isDefine );\n\t}\n\n\t/**\n\t * Gets the value for a configuration entry.\n\t *\n\t *\t\tconfig.get( 'name' );\n\t *\n\t * Deep configurations can be retrieved by separating each part with a dot.\n\t *\n\t *\t\tconfig.get( 'toolbar.collapsed' );\n\t *\n\t * @param {String} name The configuration name. Configuration names are case-sensitive.\n\t * @returns {*} The configuration value or `undefined` if the configuration entry was not found.\n\t */\n\tget( name ) {\n\t\treturn this._getFromSource( this._config, name );\n\t}\n\n\t/**\n\t * Saves passed configuration to the specified target (nested object).\n\t *\n\t * @private\n\t * @param {Object} target Nested config object.\n\t * @param {String|Object} name The configuration name or an object from which take properties as\n\t * configuration entries. Configuration names are case-sensitive.\n\t * @param {*} value The configuration value. Used if a name is passed.\n\t * @param {Boolean} [isDefine=false] Define if passed configuration should overwrite existing one.\n\t */\n\t_setToTarget( target, name, value, isDefine = false ) {\n\t\t// In case of an object, iterate through it and call `_setToTarget` again for each property.\n\t\tif ( isPlainObject( name ) ) {\n\t\t\tthis._setObjectToTarget( target, name, isDefine );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// The configuration name should be split into parts if it has dots. E.g. `resize.width` -> [`resize`, `width`].\n\t\tconst parts = name.split( '.' );\n\n\t\t// Take the name of the configuration out of the parts. E.g. `resize.width` -> `width`.\n\t\tname = parts.pop();\n\n\t\t// Iterate over parts to check if currently stored configuration has proper structure.\n\t\tfor ( const part of parts ) {\n\t\t\t// If there is no object for specified part then create one.\n\t\t\tif ( !isPlainObject( target[ part ] ) ) {\n\t\t\t\ttarget[ part ] = {};\n\t\t\t}\n\n\t\t\t// Nested object becomes a target.\n\t\t\ttarget = target[ part ];\n\t\t}\n\n\t\t// In case of value is an object.\n\t\tif ( isPlainObject( value ) ) {\n\t\t\t// We take care of proper config structure.\n\t\t\tif ( !isPlainObject( target[ name ] ) ) {\n\t\t\t\ttarget[ name ] = {};\n\t\t\t}\n\n\t\t\ttarget = target[ name ];\n\n\t\t\t// And iterate through this object calling `_setToTarget` again for each property.\n\t\t\tthis._setObjectToTarget( target, value, isDefine );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Do nothing if we are defining configuration for non empty name.\n\t\tif ( isDefine && typeof target[ name ] != 'undefined' ) {\n\t\t\treturn;\n\t\t}\n\n\t\ttarget[ name ] = value;\n\t}\n\n\t/**\n\t * Get specified configuration from specified source (nested object).\n\t *\n\t * @private\n\t * @param {Object} source level of nested object.\n\t * @param {String} name The configuration name. Configuration names are case-sensitive.\n\t * @returns {*} The configuration value or `undefined` if the configuration entry was not found.\n\t */\n\t_getFromSource( source, name ) {\n\t\t// The configuration name should be split into parts if it has dots. E.g. `resize.width` -> [`resize`, `width`].\n\t\tconst parts = name.split( '.' );\n\n\t\t// Take the name of the configuration out of the parts. E.g. `resize.width` -> `width`.\n\t\tname = parts.pop();\n\n\t\t// Iterate over parts to check if currently stored configuration has proper structure.\n\t\tfor ( const part of parts ) {\n\t\t\tif ( !isPlainObject( source[ part ] ) ) {\n\t\t\t\tsource = null;\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Nested object becomes a source.\n\t\t\tsource = source[ part ];\n\t\t}\n\n\t\t// Always returns undefined for non existing configuration.\n\t\treturn source ? cloneConfig( source[ name ] ) : undefined;\n\t}\n\n\t/**\n\t * Iterates through passed object and calls {@link #_setToTarget} method with object key and value for each property.\n\t *\n\t * @private\n\t * @param {Object} target Nested config object.\n\t * @param {Object} configuration Configuration data set\n\t * @param {Boolean} [isDefine] Defines if passed configuration is default configuration or not.\n\t */\n\t_setObjectToTarget( target, configuration, isDefine ) {\n\t\tObject.keys( configuration ).forEach( key => {\n\t\t\tthis._setToTarget( target, key, configuration[ key ], isDefine );\n\t\t} );\n\t}\n}\n\n// Clones configuration object or value.\n// @param {*} source Source configuration\n// @returns {*} Cloned configuration value.\nfunction cloneConfig( source ) {\n\treturn cloneDeepWith( source, leaveDOMReferences );\n}\n\n// A customizer function for cloneDeepWith.\n// It will leave references to DOM Elements instead of cloning them.\n//\n// @param {*} value\n// @returns {Element|undefined}\nfunction leaveDOMReferences( value ) {\n\treturn isElement( value ) ? value : undefined;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/eventinfo\n */\n\nimport spy from './spy';\n\n/**\n * The event object passed to event callbacks. It is used to provide information about the event as well as a tool to\n * manipulate it.\n */\nexport default class EventInfo {\n\t/**\n\t * @param {Object} source The emitter.\n\t * @param {String} name The event name.\n\t */\n\tconstructor( source, name ) {\n\t\t/**\n\t\t * The object that fired the event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object}\n\t\t */\n\t\tthis.source = source;\n\n\t\t/**\n\t\t * The event name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Path this event has followed. See {@link module:utils/emittermixin~EmitterMixin#delegate}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<Object>}\n\t\t */\n\t\tthis.path = [];\n\n\t\t// The following methods are defined in the constructor because they must be re-created per instance.\n\n\t\t/**\n\t\t * Stops the event emitter to call further callbacks for this event interaction.\n\t\t *\n\t\t * @method #stop\n\t\t */\n\t\tthis.stop = spy();\n\n\t\t/**\n\t\t * Removes the current callback from future interactions of this event.\n\t\t *\n\t\t * @method #off\n\t\t */\n\t\tthis.off = spy();\n\n\t\t/**\n\t\t * The value which will be returned by {@link module:utils/emittermixin~EmitterMixin#fire}.\n\t\t *\n\t\t * It's `undefined` by default and can be changed by an event listener:\n\t\t *\n\t\t *\t\tdataController.fire( 'getSelectedContent', ( evt ) => {\n\t\t *\t\t\t// This listener will make `dataController.fire( 'getSelectedContent' )`\n\t\t *\t\t\t// always return an empty DocumentFragment.\n\t\t *\t\t\tevt.return = new DocumentFragment();\n\t\t *\n\t\t *\t\t\t// Make sure no other listeners are executed.\n\t\t *\t\t\tevt.stop();\n\t\t *\t\t} );\n\t\t *\n\t\t * @member #return\n\t\t */\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/spy\n */\n\n/**\n * Creates a spy function (ala Sinon.js) that can be used to inspect call to it.\n *\n * The following are the present features:\n *\n * * spy.called: property set to `true` if the function has been called at least once.\n *\n * @returns {Function} The spy function.\n */\nfunction spy() {\n\treturn function spy() {\n\t\tspy.called = true;\n\t};\n}\n\nexport default spy;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/uid\n */\n\n/**\n * Returns a unique id. This id consist of an 'e' character and a randomly generated string of 32 aphanumeric characters.\n * Each character in uid string represents a hexadecimal digit (base 16).\n *\n * @returns {String} A hexadecimal number representing the id.\n */\nexport default function uid() {\n\tlet uuid = 'e'; // Make sure that id does not start with number.\n\n\tfor ( let i = 0; i < 8; i++ ) {\n\t\tuuid += Math.floor( ( 1 + Math.random() ) * 0x10000 ).toString( 16 ).substring( 1 );\n\t}\n\n\treturn uuid;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/priorities\n */\n\n/**\n * String representing a priority value.\n *\n * @typedef {'highest'|'high'|'normal'|'low'|'lowest'} module:utils/priorities~PriorityString\n */\n\n/**\n * Provides group of constants to use instead of hardcoding numeric priority values.\n *\n * @namespace\n */\nconst priorities = {\n\t/**\n\t * Converts a string with priority name to it's numeric value. If `Number` is given, it just returns it.\n\t *\n\t * @static\n\t * @param {module:utils/priorities~PriorityString|Number} priority Priority to convert.\n\t * @returns {Number} Converted priority.\n\t */\n\tget( priority ) {\n\t\tif ( typeof priority != 'number' ) {\n\t\t\treturn this[ priority ] || this.normal;\n\t\t} else {\n\t\t\treturn priority;\n\t\t}\n\t},\n\n\thighest: 100000,\n\thigh: 1000,\n\tnormal: 0,\n\tlow: -1000,\n\tlowest: -100000\n};\n\nexport default priorities;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/emittermixin\n */\n\nimport EventInfo from './eventinfo';\nimport uid from './uid';\nimport priorities from './priorities';\n\n// To check if component is loaded more than once.\nimport './version';\nimport CKEditorError from './ckeditorerror';\n\nconst _listeningTo = Symbol( 'listeningTo' );\nconst _emitterId = Symbol( 'emitterId' );\n\n/**\n * Mixin that injects the {@link ~Emitter events API} into its host.\n *\n * @mixin EmitterMixin\n * @implements module:utils/emittermixin~Emitter\n */\nconst EmitterMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\ton( event, callback, options = {} ) {\n\t\tthis.listenTo( this, event, callback, options );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tonce( event, callback, options ) {\n\t\tlet wasFired = false;\n\n\t\tconst onceCallback = function( event, ...args ) {\n\t\t\t// Ensure the callback is called only once even if the callback itself leads to re-firing the event\n\t\t\t// (which would call the callback again).\n\t\t\tif ( !wasFired ) {\n\t\t\t\twasFired = true;\n\n\t\t\t\t// Go off() at the first call.\n\t\t\t\tevent.off();\n\n\t\t\t\t// Go with the original callback.\n\t\t\t\tcallback.call( this, event, ...args );\n\t\t\t}\n\t\t};\n\n\t\t// Make a similar on() call, simply replacing the callback.\n\t\tthis.listenTo( this, event, onceCallback, options );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\toff( event, callback ) {\n\t\tthis.stopListening( this, event, callback );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tlistenTo( emitter, event, callback, options = {} ) {\n\t\tlet emitterInfo, eventCallbacks;\n\n\t\t// _listeningTo contains a list of emitters that this object is listening to.\n\t\t// This list has the following format:\n\t\t//\n\t\t// _listeningTo: {\n\t\t// emitterId: {\n\t\t// emitter: emitter,\n\t\t// callbacks: {\n\t\t// event1: [ callback1, callback2, ... ]\n\t\t// ....\n\t\t// }\n\t\t// },\n\t\t// ...\n\t\t// }\n\n\t\tif ( !this[ _listeningTo ] ) {\n\t\t\tthis[ _listeningTo ] = {};\n\t\t}\n\n\t\tconst emitters = this[ _listeningTo ];\n\n\t\tif ( !_getEmitterId( emitter ) ) {\n\t\t\t_setEmitterId( emitter );\n\t\t}\n\n\t\tconst emitterId = _getEmitterId( emitter );\n\n\t\tif ( !( emitterInfo = emitters[ emitterId ] ) ) {\n\t\t\temitterInfo = emitters[ emitterId ] = {\n\t\t\t\temitter,\n\t\t\t\tcallbacks: {}\n\t\t\t};\n\t\t}\n\n\t\tif ( !( eventCallbacks = emitterInfo.callbacks[ event ] ) ) {\n\t\t\teventCallbacks = emitterInfo.callbacks[ event ] = [];\n\t\t}\n\n\t\teventCallbacks.push( callback );\n\n\t\t// Finally register the callback to the event.\n\t\tcreateEventNamespace( emitter, event );\n\t\tconst lists = getCallbacksListsForNamespace( emitter, event );\n\t\tconst priority = priorities.get( options.priority );\n\n\t\tconst callbackDefinition = {\n\t\t\tcallback,\n\t\t\tpriority\n\t\t};\n\n\t\t// Add the callback to all callbacks list.\n\t\tfor ( const callbacks of lists ) {\n\t\t\t// Add the callback to the list in the right priority position.\n\t\t\tlet added = false;\n\n\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\tif ( callbacks[ i ].priority < priority ) {\n\t\t\t\t\tcallbacks.splice( i, 0, callbackDefinition );\n\t\t\t\t\tadded = true;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add at the end, if right place was not found.\n\t\t\tif ( !added ) {\n\t\t\t\tcallbacks.push( callbackDefinition );\n\t\t\t}\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\tconst emitters = this[ _listeningTo ];\n\t\tlet emitterId = emitter && _getEmitterId( emitter );\n\t\tconst emitterInfo = emitters && emitterId && emitters[ emitterId ];\n\t\tconst eventCallbacks = emitterInfo && event && emitterInfo.callbacks[ event ];\n\n\t\t// Stop if nothing has been listened.\n\t\tif ( !emitters || ( emitter && !emitterInfo ) || ( event && !eventCallbacks ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// All params provided. off() that single callback.\n\t\tif ( callback ) {\n\t\t\tremoveCallback( emitter, event, callback );\n\t\t}\n\t\t// Only `emitter` and `event` provided. off() all callbacks for that event.\n\t\telse if ( eventCallbacks ) {\n\t\t\twhile ( ( callback = eventCallbacks.pop() ) ) {\n\t\t\t\tremoveCallback( emitter, event, callback );\n\t\t\t}\n\n\t\t\tdelete emitterInfo.callbacks[ event ];\n\t\t}\n\t\t// Only `emitter` provided. off() all events for that emitter.\n\t\telse if ( emitterInfo ) {\n\t\t\tfor ( event in emitterInfo.callbacks ) {\n\t\t\t\tthis.stopListening( emitter, event );\n\t\t\t}\n\t\t\tdelete emitters[ emitterId ];\n\t\t}\n\t\t// No params provided. off() all emitters.\n\t\telse {\n\t\t\tfor ( emitterId in emitters ) {\n\t\t\t\tthis.stopListening( emitters[ emitterId ].emitter );\n\t\t\t}\n\t\t\tdelete this[ _listeningTo ];\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfire( eventOrInfo, ...args ) {\n\t\ttry {\n\t\t\tconst eventInfo = eventOrInfo instanceof EventInfo ? eventOrInfo : new EventInfo( this, eventOrInfo );\n\t\t\tconst event = eventInfo.name;\n\t\t\tlet callbacks = getCallbacksForEvent( this, event );\n\n\t\t\t// Record that the event passed this emitter on its path.\n\t\t\teventInfo.path.push( this );\n\n\t\t\t// Handle event listener callbacks first.\n\t\t\tif ( callbacks ) {\n\t\t\t\t// Arguments passed to each callback.\n\t\t\t\tconst callbackArgs = [ eventInfo, ...args ];\n\n\t\t\t\t// Copying callbacks array is the easiest and most secure way of preventing infinite loops, when event callbacks\n\t\t\t\t// are added while processing other callbacks. Previous solution involved adding counters (unique ids) but\n\t\t\t\t// failed if callbacks were added to the queue before currently processed callback.\n\t\t\t\t// If this proves to be too inefficient, another method is to change `.on()` so callbacks are stored if same\n\t\t\t\t// event is currently processed. Then, `.fire()` at the end, would have to add all stored events.\n\t\t\t\tcallbacks = Array.from( callbacks );\n\n\t\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\t\tcallbacks[ i ].callback.apply( this, callbackArgs );\n\n\t\t\t\t\t// Remove the callback from future requests if off() has been called.\n\t\t\t\t\tif ( eventInfo.off.called ) {\n\t\t\t\t\t\t// Remove the called mark for the next calls.\n\t\t\t\t\t\tdelete eventInfo.off.called;\n\n\t\t\t\t\t\tremoveCallback( this, event, callbacks[ i ].callback );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Do not execute next callbacks if stop() was called.\n\t\t\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Delegate event to other emitters if needed.\n\t\t\tif ( this._delegations ) {\n\t\t\t\tconst destinations = this._delegations.get( event );\n\t\t\t\tconst passAllDestinations = this._delegations.get( '*' );\n\n\t\t\t\tif ( destinations ) {\n\t\t\t\t\tfireDelegatedEvents( destinations, eventInfo, args );\n\t\t\t\t}\n\n\t\t\t\tif ( passAllDestinations ) {\n\t\t\t\t\tfireDelegatedEvents( passAllDestinations, eventInfo, args );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn eventInfo.return;\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdelegate( ...events ) {\n\t\treturn {\n\t\t\tto: ( emitter, nameOrFunction ) => {\n\t\t\t\tif ( !this._delegations ) {\n\t\t\t\t\tthis._delegations = new Map();\n\t\t\t\t}\n\n\t\t\t\t// Originally there was a for..of loop which unfortunately caused an error in Babel that didn't allow\n\t\t\t\t// build an application. See: https://github.com/ckeditor/ckeditor5-react/issues/40.\n\t\t\t\tevents.forEach( eventName => {\n\t\t\t\t\tconst destinations = this._delegations.get( eventName );\n\n\t\t\t\t\tif ( !destinations ) {\n\t\t\t\t\t\tthis._delegations.set( eventName, new Map( [ [ emitter, nameOrFunction ] ] ) );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tdestinations.set( emitter, nameOrFunction );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstopDelegating( event, emitter ) {\n\t\tif ( !this._delegations ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !event ) {\n\t\t\tthis._delegations.clear();\n\t\t} else if ( !emitter ) {\n\t\t\tthis._delegations.delete( event );\n\t\t} else {\n\t\t\tconst destinations = this._delegations.get( event );\n\n\t\t\tif ( destinations ) {\n\t\t\t\tdestinations.delete( emitter );\n\t\t\t}\n\t\t}\n\t}\n};\n\nexport default EmitterMixin;\n\n/**\n * Emitter/listener interface.\n *\n * Can be easily implemented by a class by mixing the {@link module:utils/emittermixin~EmitterMixin} mixin.\n *\n * @interface Emitter\n */\n\n/**\n * Registers a callback function to be executed when an event is fired.\n *\n * Shorthand for {@link #listenTo `this.listenTo( this, event, callback, options )`} (it makes the emitter\n * listen on itself).\n *\n * @method #on\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Registers a callback function to be executed on the next time the event is fired only. This is similar to\n * calling {@link #on} followed by {@link #off} in the callback.\n *\n * @method #once\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Stops executing the callback on the given event.\n * Shorthand for {@link #stopListening `this.stopListening( this, event, callback )`}.\n *\n * @method #off\n * @param {String} event The name of the event.\n * @param {Function} callback The function to stop being called.\n */\n\n/**\n * Registers a callback function to be executed when an event is fired in a specific (emitter) object.\n *\n * Events can be grouped in namespaces using `:`.\n * When namespaced event is fired, it additionally fires all callbacks for that namespace.\n *\n *\t\t// myEmitter.on( ... ) is a shorthand for myEmitter.listenTo( myEmitter, ... ).\n *\t\tmyEmitter.on( 'myGroup', genericCallback );\n *\t\tmyEmitter.on( 'myGroup:myEvent', specificCallback );\n *\n *\t\t// genericCallback is fired.\n *\t\tmyEmitter.fire( 'myGroup' );\n *\t\t// both genericCallback and specificCallback are fired.\n *\t\tmyEmitter.fire( 'myGroup:myEvent' );\n *\t\t// genericCallback is fired even though there are no callbacks for \"foo\".\n *\t\tmyEmitter.fire( 'myGroup:foo' );\n *\n * An event callback can {@link module:utils/eventinfo~EventInfo#stop stop the event} and\n * set the {@link module:utils/eventinfo~EventInfo#return return value} of the {@link #fire} method.\n *\n * @method #listenTo\n * @param {module:utils/emittermixin~Emitter} emitter The object that fires the event.\n * @param {String} event The name of the event.\n * @param {Function} callback The function to be called on event.\n * @param {Object} [options={}] Additional options.\n * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n * order they were added.\n */\n\n/**\n * Stops listening for events. It can be used at different levels:\n *\n * * To stop listening to a specific callback.\n * * To stop listening to a specific event.\n * * To stop listening to all events fired by a specific object.\n * * To stop listening to all events fired by all objects.\n *\n * @method #stopListening\n * @param {module:utils/emittermixin~Emitter} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n * for all events from `emitter`.\n * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n * `event`.\n */\n\n/**\n * Fires an event, executing all callbacks registered for it.\n *\n * The first parameter passed to callbacks is an {@link module:utils/eventinfo~EventInfo} object,\n * followed by the optional `args` provided in the `fire()` method call.\n *\n * @method #fire\n * @param {String|module:utils/eventinfo~EventInfo} eventOrInfo The name of the event or `EventInfo` object if event is delegated.\n * @param {...*} [args] Additional arguments to be passed to the callbacks.\n * @returns {*} By default the method returns `undefined`. However, the return value can be changed by listeners\n * through modification of the {@link module:utils/eventinfo~EventInfo#return `evt.return`}'s property (the event info\n * is the first param of every callback).\n */\n\n/**\n * Delegates selected events to another {@link module:utils/emittermixin~Emitter}. For instance:\n *\n *\t\temitterA.delegate( 'eventX' ).to( emitterB );\n *\t\temitterA.delegate( 'eventX', 'eventY' ).to( emitterC );\n *\n * then `eventX` is delegated (fired by) `emitterB` and `emitterC` along with `data`:\n *\n *\t\temitterA.fire( 'eventX', data );\n *\n * and `eventY` is delegated (fired by) `emitterC` along with `data`:\n *\n *\t\temitterA.fire( 'eventY', data );\n *\n * @method #delegate\n * @param {...String} events Event names that will be delegated to another emitter.\n * @returns {module:utils/emittermixin~EmitterMixinDelegateChain}\n */\n\n/**\n * Stops delegating events. It can be used at different levels:\n *\n * * To stop delegating all events.\n * * To stop delegating a specific event to all emitters.\n * * To stop delegating a specific event to a specific emitter.\n *\n * @method #stopDelegating\n * @param {String} [event] The name of the event to stop delegating. If omitted, stops it all delegations.\n * @param {module:utils/emittermixin~Emitter} [emitter] (requires `event`) The object to stop delegating a particular event to.\n * If omitted, stops delegation of `event` to all emitters.\n */\n\n/**\n * Checks if `listeningEmitter` listens to an emitter with given `listenedToEmitterId` and if so, returns that emitter.\n * If not, returns `null`.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} listeningEmitter An emitter that listens.\n * @param {String} listenedToEmitterId Unique emitter id of emitter listened to.\n * @returns {module:utils/emittermixin~Emitter|null}\n */\nexport function _getEmitterListenedTo( listeningEmitter, listenedToEmitterId ) {\n\tif ( listeningEmitter[ _listeningTo ] && listeningEmitter[ _listeningTo ][ listenedToEmitterId ] ) {\n\t\treturn listeningEmitter[ _listeningTo ][ listenedToEmitterId ].emitter;\n\t}\n\n\treturn null;\n}\n\n/**\n * Sets emitter's unique id.\n *\n * **Note:** `_emitterId` can be set only once.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} emitter An emitter for which id will be set.\n * @param {String} [id] Unique id to set. If not passed, random unique id will be set.\n */\nexport function _setEmitterId( emitter, id ) {\n\tif ( !emitter[ _emitterId ] ) {\n\t\temitter[ _emitterId ] = id || uid();\n\t}\n}\n\n/**\n * Returns emitter's unique id.\n *\n * @protected\n * @param {module:utils/emittermixin~Emitter} emitter An emitter which id will be returned.\n */\nexport function _getEmitterId( emitter ) {\n\treturn emitter[ _emitterId ];\n}\n\n// Gets the internal `_events` property of the given object.\n// `_events` property store all lists with callbacks for registered event names.\n// If there were no events registered on the object, empty `_events` object is created.\nfunction getEvents( source ) {\n\tif ( !source._events ) {\n\t\tObject.defineProperty( source, '_events', {\n\t\t\tvalue: {}\n\t\t} );\n\t}\n\n\treturn source._events;\n}\n\n// Creates event node for generic-specific events relation architecture.\nfunction makeEventNode() {\n\treturn {\n\t\tcallbacks: [],\n\t\tchildEvents: []\n\t};\n}\n\n// Creates an architecture for generic-specific events relation.\n// If needed, creates all events for given eventName, i.e. if the first registered event\n// is foo:bar:abc, it will create foo:bar:abc, foo:bar and foo event and tie them together.\n// It also copies callbacks from more generic events to more specific events when\n// specific events are created.\nfunction createEventNamespace( source, eventName ) {\n\tconst events = getEvents( source );\n\n\t// First, check if the event we want to add to the structure already exists.\n\tif ( events[ eventName ] ) {\n\t\t// If it exists, we don't have to do anything.\n\t\treturn;\n\t}\n\n\t// In other case, we have to create the structure for the event.\n\t// Note, that we might need to create intermediate events too.\n\t// I.e. if foo:bar:abc is being registered and we only have foo in the structure,\n\t// we need to also register foo:bar.\n\n\t// Currently processed event name.\n\tlet name = eventName;\n\t// Name of the event that is a child event for currently processed event.\n\tlet childEventName = null;\n\n\t// Array containing all newly created specific events.\n\tconst newEventNodes = [];\n\n\t// While loop can't check for ':' index because we have to handle generic events too.\n\t// In each loop, we truncate event name, going from the most specific name to the generic one.\n\t// I.e. foo:bar:abc -> foo:bar -> foo.\n\twhile ( name !== '' ) {\n\t\tif ( events[ name ] ) {\n\t\t\t// If the currently processed event name is already registered, we can be sure\n\t\t\t// that it already has all the structure created, so we can break the loop here\n\t\t\t// as no more events need to be registered.\n\t\t\tbreak;\n\t\t}\n\n\t\t// If this event is not yet registered, create a new object for it.\n\t\tevents[ name ] = makeEventNode();\n\t\t// Add it to the array with newly created events.\n\t\tnewEventNodes.push( events[ name ] );\n\n\t\t// Add previously processed event name as a child of this event.\n\t\tif ( childEventName ) {\n\t\t\tevents[ name ].childEvents.push( childEventName );\n\t\t}\n\n\t\tchildEventName = name;\n\t\t// If `.lastIndexOf()` returns -1, `.substr()` will return '' which will break the loop.\n\t\tname = name.substr( 0, name.lastIndexOf( ':' ) );\n\t}\n\n\tif ( name !== '' ) {\n\t\t// If name is not empty, we found an already registered event that was a parent of the\n\t\t// event we wanted to register.\n\n\t\t// Copy that event's callbacks to newly registered events.\n\t\tfor ( const node of newEventNodes ) {\n\t\t\tnode.callbacks = events[ name ].callbacks.slice();\n\t\t}\n\n\t\t// Add last newly created event to the already registered event.\n\t\tevents[ name ].childEvents.push( childEventName );\n\t}\n}\n\n// Gets an array containing callbacks list for a given event and it's more specific events.\n// I.e. if given event is foo:bar and there is also foo:bar:abc event registered, this will\n// return callback list of foo:bar and foo:bar:abc (but not foo).\nfunction getCallbacksListsForNamespace( source, eventName ) {\n\tconst eventNode = getEvents( source )[ eventName ];\n\n\tif ( !eventNode ) {\n\t\treturn [];\n\t}\n\n\tlet callbacksLists = [ eventNode.callbacks ];\n\n\tfor ( let i = 0; i < eventNode.childEvents.length; i++ ) {\n\t\tconst childCallbacksLists = getCallbacksListsForNamespace( source, eventNode.childEvents[ i ] );\n\n\t\tcallbacksLists = callbacksLists.concat( childCallbacksLists );\n\t}\n\n\treturn callbacksLists;\n}\n\n// Get the list of callbacks for a given event, but only if there any callbacks have been registered.\n// If there are no callbacks registered for given event, it checks if this is a specific event and looks\n// for callbacks for it's more generic version.\nfunction getCallbacksForEvent( source, eventName ) {\n\tlet event;\n\n\tif ( !source._events || !( event = source._events[ eventName ] ) || !event.callbacks.length ) {\n\t\t// There are no callbacks registered for specified eventName.\n\t\t// But this could be a specific-type event that is in a namespace.\n\t\tif ( eventName.indexOf( ':' ) > -1 ) {\n\t\t\t// If the eventName is specific, try to find callback lists for more generic event.\n\t\t\treturn getCallbacksForEvent( source, eventName.substr( 0, eventName.lastIndexOf( ':' ) ) );\n\t\t} else {\n\t\t\t// If this is a top-level generic event, return null;\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn event.callbacks;\n}\n\n// Fires delegated events for given map of destinations.\n//\n// @private\n// * @param {Map.<utils.Emitter>} destinations A map containing\n// `[ {@link module:utils/emittermixin~Emitter}, \"event name\" ]` pair destinations.\n// * @param {utils.EventInfo} eventInfo The original event info object.\n// * @param {Array.<*>} fireArgs Arguments the original event was fired with.\nfunction fireDelegatedEvents( destinations, eventInfo, fireArgs ) {\n\tfor ( let [ emitter, name ] of destinations ) {\n\t\tif ( !name ) {\n\t\t\tname = eventInfo.name;\n\t\t} else if ( typeof name == 'function' ) {\n\t\t\tname = name( eventInfo.name );\n\t\t}\n\n\t\tconst delegatedInfo = new EventInfo( eventInfo.source, name );\n\n\t\tdelegatedInfo.path = [ ...eventInfo.path ];\n\n\t\temitter.fire( delegatedInfo, ...fireArgs );\n\t}\n}\n\n// Removes callback from emitter for given event.\n//\n// @param {module:utils/emittermixin~Emitter} emitter\n// @param {String} event\n// @param {Function} callback\nfunction removeCallback( emitter, event, callback ) {\n\tconst lists = getCallbacksListsForNamespace( emitter, event );\n\n\tfor ( const callbacks of lists ) {\n\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\tif ( callbacks[ i ].callback == callback ) {\n\t\t\t\t// Remove the callback from the list (fixing the next index).\n\t\t\t\tcallbacks.splice( i, 1 );\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * The return value of {@link ~EmitterMixin#delegate}.\n *\n * @interface module:utils/emittermixin~EmitterMixinDelegateChain\n */\n\n/**\n * Selects destination for {@link module:utils/emittermixin~EmitterMixin#delegate} events.\n *\n * @method #to\n * @param {module:utils/emittermixin~Emitter} emitter An `EmitterMixin` instance which is the destination for delegated events.\n * @param {String|Function} [nameOrFunction] A custom event name or function which converts the original name string.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/mix\n */\n\n/**\n * Copies enumerable properties and symbols from the objects given as 2nd+ parameters to the\n * prototype of first object (a constructor).\n *\n *\t\tclass Editor {\n *\t\t\t...\n *\t\t}\n *\n *\t\tconst SomeMixin = {\n *\t\t\ta() {\n *\t\t\t\treturn 'a';\n *\t\t\t}\n *\t\t};\n *\n *\t\tmix( Editor, SomeMixin, ... );\n *\n *\t\tnew Editor().a(); // -> 'a'\n *\n * Note: Properties which already exist in the base class will not be overriden.\n *\n * @param {Function} [baseClass] Class which prototype will be extended.\n * @param {Object} [...mixins] Objects from which to get properties.\n */\nexport default function mix( baseClass, ...mixins ) {\n\tmixins.forEach( mixin => {\n\t\tObject.getOwnPropertyNames( mixin ).concat( Object.getOwnPropertySymbols( mixin ) )\n\t\t\t.forEach( key => {\n\t\t\t\tif ( key in baseClass.prototype ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst sourceDescriptor = Object.getOwnPropertyDescriptor( mixin, key );\n\t\t\t\tsourceDescriptor.enumerable = false;\n\n\t\t\t\tObject.defineProperty( baseClass.prototype, key, sourceDescriptor );\n\t\t\t} );\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/comparearrays\n */\n\n/**\n * Compares how given arrays relate to each other. One array can be: same as another array, prefix of another array\n * or completely different. If arrays are different, first index at which they differ is returned. Otherwise,\n * a flag specifying the relation is returned. Flags are negative numbers, so whenever a number >= 0 is returned\n * it means that arrays differ.\n *\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 2 ] );\t\t// 'same'\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 2, 1 ] );\t\t// 'prefix'\n *\t\tcompareArrays( [ 0, 2 ], [ 0 ] );\t\t\t// 'extension'\n *\t\tcompareArrays( [ 0, 2 ], [ 1, 2 ] );\t\t// 0\n *\t\tcompareArrays( [ 0, 2 ], [ 0, 1 ] );\t\t// 1\n *\n * @param {Array} a Array that is compared.\n * @param {Array} b Array to compare with.\n * @returns {module:utils/comparearrays~ArrayRelation} How array `a` is related to `b`.\n */\nexport default function compareArrays( a, b ) {\n\tconst minLen = Math.min( a.length, b.length );\n\n\tfor ( let i = 0; i < minLen; i++ ) {\n\t\tif ( a[ i ] != b[ i ] ) {\n\t\t\t// The arrays are different.\n\t\t\treturn i;\n\t\t}\n\t}\n\n\t// Both arrays were same at all points.\n\tif ( a.length == b.length ) {\n\t\t// If their length is also same, they are the same.\n\t\treturn 'same';\n\t} else if ( a.length < b.length ) {\n\t\t// Compared array is shorter so it is a prefix of the other array.\n\t\treturn 'prefix';\n\t} else {\n\t\t// Compared array is longer so it is an extension of the other array.\n\t\treturn 'extension';\n\t}\n}\n\n/**\n * @typedef {'extension'|'same'|'prefix'} module:utils/comparearrays~ArrayRelation\n */\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * Creates a shallow clone of `value`.\n *\n * **Note:** This method is loosely based on the\n * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)\n * and supports cloning arrays, array buffers, booleans, date objects, maps,\n * numbers, `Object` objects, regexes, sets, strings, symbols, and typed\n * arrays. The own enumerable properties of `arguments` objects are cloned\n * as plain objects. An empty object is returned for uncloneable values such\n * as error objects, functions, DOM nodes, and WeakMaps.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to clone.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeep\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var shallow = _.clone(objects);\n * console.log(shallow[0] === objects[0]);\n * // => true\n */\nfunction clone(value) {\n return baseClone(value, CLONE_SYMBOLS_FLAG);\n}\n\nexport default clone;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/node\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport { clone } from 'lodash-es';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Abstract tree view node class.\n *\n * This is an abstract class. Its constructor should not be used directly.\n * Use the {@link module:engine/view/element~Element} class to create view elements\n * or {@link module:engine/view/text~Text} class to create view text nodes.\n *\n * @abstract\n */\nexport default class Node {\n\t/**\n\t * Creates a tree view node.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Parent element. Null by default. Set by {@link module:engine/view/element~Element#_insertChild}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t\t */\n\t\tthis.parent = null;\n\t}\n\n\t/**\n\t * Index of the node in the parent element or null if the node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that view tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget index() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// No parent or child doesn't exist in parent's children.\n\t\tif ( ( pos = this.parent.getChildIndex( this ) ) == -1 ) {\n\t\t\t/**\n\t\t\t * The node's parent does not contain this node. It means that the document tree is corrupted.\n\t\t\t *\n\t\t\t * @error view-node-not-found-in-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Node's next sibling, or `null` if it is the last child.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nextSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index + 1 ) ) || null;\n\t}\n\n\t/**\n\t * Node's previous sibling, or `null` if it is the first child.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget previousSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index - 1 ) ) || null;\n\t}\n\n\t/**\n\t * Top-most ancestor of the node. If the node has no parent it is the root itself.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\tlet root = this; // eslint-disable-line consistent-this\n\n\t\twhile ( root.parent ) {\n\t\t\troot = root.parent;\n\t\t}\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/document~Document View document} that owns this node, or `null` if the node is inside\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/document~Document|null}\n\t */\n\tget document() {\n\t\t// Parent might be Node, null or DocumentFragment.\n\t\tif ( this.parent instanceof Node ) {\n\t\t\treturn this.parent.document;\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Gets a path to the node. The path is an array containing indices of consecutive ancestors of this node,\n\t * beginning from {@link module:engine/view/node~Node#root root}, down to this node's index.\n\t *\n\t *\t\tconst abc = downcastWriter.createText( 'abc' );\n\t *\t\tconst foo = downcastWriter.createText( 'foo' );\n\t *\t\tconst h1 = downcastWriter.createElement( 'h1', null, downcastWriter.createText( 'header' ) );\n\t *\t\tconst p = downcastWriter.createElement( 'p', null, [ abc, foo ] );\n\t *\t\tconst div = downcastWriter.createElement( 'div', null, [ h1, p ] );\n\t *\t\tfoo.getPath(); // Returns [ 1, 3 ]. `foo` is in `p` which is in `div`. `p` starts at offset 1, while `foo` at 3.\n\t *\t\th1.getPath(); // Returns [ 0 ].\n\t *\t\tdiv.getPath(); // Returns [].\n\t *\n\t * @returns {Array.<Number>} The path.\n\t */\n\tgetPath() {\n\t\tconst path = [];\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\twhile ( node.parent ) {\n\t\t\tpath.unshift( node.index );\n\t\t\tnode = node.parent;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this node.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this node will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from node's parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/element~Element} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both nodes.\n\t *\n\t * @param {module:engine/view/node~Node} node The second node.\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` both nodes will be considered \"ancestors\" too.\n\t * Which means that if e.g. node A is inside B, then their common ancestor will be B.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( node, options = {} ) {\n\t\tconst ancestorsA = this.getAncestors( options );\n\t\tconst ancestorsB = node.getAncestors( options );\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns whether this node is before given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/view/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/view/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisBefore( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisPath = this.getPath();\n\t\tconst nodePath = node.getPath();\n\n\t\tconst result = compareArrays( thisPath, nodePath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn true;\n\n\t\t\tcase 'extension':\n\t\t\t\treturn false;\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < nodePath[ result ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns whether this node is after given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/view/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/view/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisAfter( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// In other cases, just check if the `node` is before, and return the opposite.\n\t\treturn !this.isBefore( node );\n\t}\n\n\t/**\n\t * Removes node from parent.\n\t *\n\t * @protected\n\t */\n\t_remove() {\n\t\tthis.parent._removeChildren( this.index );\n\t}\n\n\t/**\n\t * @protected\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Changed node.\n\t * @fires change\n\t */\n\t_fireChange( type, node ) {\n\t\tthis.fire( 'change:' + type, node );\n\n\t\tif ( this.parent ) {\n\t\t\tthis.parent._fireChange( type, node );\n\t\t}\n\t}\n\n\t/**\n\t * Custom toJSON method to solve child-parent circular dependencies.\n\t *\n\t * @returns {Object} Clone of this object with the parent property removed.\n\t */\n\ttoJSON() {\n\t\tconst json = clone( this );\n\n\t\t// Due to circular references we need to remove parent reference.\n\t\tdelete json.parent;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t * This method is useful when processing view objects that are of unknown type. For example, a function\n\t * may return a {@link module:engine/view/documentfragment~DocumentFragment} or a {@link module:engine/view/node~Node}\n\t * that can be either a text node or an element. This method can be used to check what kind of object is returned.\n\t *\n\t *\t\tsomeObject.is( 'element' ); // -> true if this is an element\n\t *\t\tsomeObject.is( 'node' ); // -> true if this is a node (a text node or an element)\n\t *\t\tsomeObject.is( 'documentFragment' ); // -> true if this is a document fragment\n\t *\n\t * Since this method is also available on a range of model objects, you can prefix the type of the object with\n\t * `model:` or `view:` to check, for example, if this is the model's or view's element:\n\t *\n\t *\t\tviewElement.is( 'view:element' ); // -> true\n\t *\t\tviewElement.is( 'model:element' ); // -> false\n\t *\n\t * By using this method it is also possible to check a name of an element:\n\t *\n\t *\t\timgElement.is( 'img' ); // -> true\n\t *\t\timgElement.is( 'element', 'img' ); // -> same as above\n\t *\t\timgElement.is( 'view:element', 'img' ); // -> same as above, but more precise\n\t *\n\t * The list of view objects which implement the `is()` method:\n\t *\n\t * * {@link module:engine/view/attributeelement~AttributeElement#is `AttributeElement#is()`}\n\t * * {@link module:engine/view/containerelement~ContainerElement#is `ContainerElement#is()`}\n\t * * {@link module:engine/view/documentfragment~DocumentFragment#is `DocumentFragment#is()`}\n\t * * {@link module:engine/view/documentselection~DocumentSelection#is `DocumentSelection#is()`}\n\t * * {@link module:engine/view/editableelement~EditableElement#is `EditableElement#is()`}\n\t * * {@link module:engine/view/element~Element#is `Element#is()`}\n\t * * {@link module:engine/view/emptyelement~EmptyElement#is `EmptyElement#is()`}\n\t * * {@link module:engine/view/node~Node#is `Node#is()`}\n\t * * {@link module:engine/view/position~Position#is `Position#is()`}\n\t * * {@link module:engine/view/range~Range#is `Range#is()`}\n\t * * {@link module:engine/view/rooteditableelement~RootEditableElement#is `RootEditableElement#is()`}\n\t * * {@link module:engine/view/selection~Selection#is `Selection#is()`}\n\t * * {@link module:engine/view/text~Text#is `Text#is()`}\n\t * * {@link module:engine/view/textproxy~TextProxy#is `TextProxy#is()`}\n\t * * {@link module:engine/view/uielement~UIElement#is `UIElement#is()`}\n\t *\n\t * @method #is\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'node' || type == 'view:node';\n\t}\n\n\t/**\n\t * Clones this node.\n\t *\n\t * @protected\n\t * @method #_clone\n\t * @returns {module:engine/view/node~Node} Clone of this node.\n\t */\n\n\t/**\n\t * Checks if provided node is similar to this node.\n\t *\n\t * @method #isSimilar\n\t * @returns {Boolean} True if nodes are similar.\n\t */\n}\n\n/**\n * Fired when list of {@link module:engine/view/element~Element elements} children changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:children\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * Fired when list of {@link module:engine/view/element~Element elements} attributes changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:attributes\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * Fired when {@link module:engine/view/text~Text text nodes} data changes.\n *\n * Change event is bubbled – it is fired on all ancestors.\n *\n * @event change:text\n * @param {module:engine/view/node~Node} changedNode\n */\n\n/**\n * @event change\n */\n\nmix( Node, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/text\n */\n\nimport Node from './node';\n\n/**\n * Tree view text node.\n *\n * The constructor of this class shouldn't be used directly. To create new Text instances\n * use the {@link module:engine/view/downcastwriter~DowncastWriter#createText `DowncastWriter#createText()`}\n * method when working on data downcasted from the model or the\n * {@link module:engine/view/upcastwriter~UpcastWriter#createText `UpcastWriter#createText()`}\n * method when working on non-semantic views.\n *\n * @extends module:engine/view/node~Node\n */\nexport default class Text extends Node {\n\t/**\n\t * Creates a tree view text node.\n\t *\n\t * @protected\n\t * @param {String} data The text's data.\n\t */\n\tconstructor( data ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * The text content.\n\t\t *\n\t\t * Setting the data fires the {@link module:engine/view/node~Node#event:change:text change event}.\n\t\t *\n\t\t * @protected\n\t\t * @member {String} module:engine/view/text~Text#_textData\n\t\t */\n\t\tthis._textData = data;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\ttext.is( 'text' ); // -> true\n\t *\t\ttext.is( 'node' ); // -> true\n\t *\t\ttext.is( 'view:text' ); // -> true\n\t *\t\ttext.is( 'view:node' ); // -> true\n\t *\n\t *\t\ttext.is( 'model:text' ); // -> false\n\t *\t\ttext.is( 'element' ); // -> false\n\t *\t\ttext.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'text' || type == 'view:text' || super.is( type );\n\t}\n\n\t/**\n\t * The text content.\n\t *\n\t * @readonly\n\t * @type {String}\n\t */\n\tget data() {\n\t\treturn this._textData;\n\t}\n\n\t/**\n\t * This getter is required when using the addition assignment operator on protected property:\n\t *\n\t *\t\tconst foo = downcastWriter.createText( 'foo' );\n\t *\t\tconst bar = downcastWriter.createText( 'bar' );\n\t *\n\t *\t\tfoo._data += bar.data; // executes: `foo._data = foo._data + bar.data`\n\t *\t\tconsole.log( foo.data ); // prints: 'foobar'\n\t *\n\t * If the protected getter didn't exist, `foo._data` will return `undefined` and result of the merge will be invalid.\n\t *\n\t * @protected\n\t * @type {String}\n\t */\n\tget _data() {\n\t\treturn this.data;\n\t}\n\n\t/**\n\t * Sets data and fires the {@link module:engine/view/node~Node#event:change:text change event}.\n\t *\n\t * @protected\n\t * @fires change:text\n\t * @param {String} data New data for the text node.\n\t */\n\tset _data( data ) {\n\t\tthis._fireChange( 'text', this );\n\n\t\tthis._textData = data;\n\t}\n\n\t/**\n\t * Checks if this text node is similar to other text node.\n\t * Both nodes should have the same data to be considered as similar.\n\t *\n\t * @param {module:engine/view/text~Text} otherNode Node to check if it is same as this node.\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherNode ) {\n\t\tif ( !( otherNode instanceof Text ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this === otherNode || this.data === otherNode.data;\n\t}\n\n\t/**\n\t * Clones this node.\n\t *\n\t * @protected\n\t * @returns {module:engine/view/text~Text} Text node that is a clone of this node.\n\t */\n\t_clone() {\n\t\treturn new Text( this.data );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/textproxy\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * TextProxy is a wrapper for substring of {@link module:engine/view/text~Text}. Instance of this class is created by\n * {@link module:engine/view/treewalker~TreeWalker} when only a part of {@link module:engine/view/text~Text} needs to be returned.\n *\n * `TextProxy` has an API similar to {@link module:engine/view/text~Text Text} and allows to do most of the common tasks performed\n * on view nodes.\n *\n * **Note:** Some `TextProxy` instances may represent whole text node, not just a part of it.\n * See {@link module:engine/view/textproxy~TextProxy#isPartial}.\n *\n * **Note:** `TextProxy` is a readonly interface.\n *\n * **Note:** `TextProxy` instances are created on the fly basing on the current state of parent {@link module:engine/view/text~Text}.\n * Because of this it is highly unrecommended to store references to `TextProxy instances because they might get\n * invalidated due to operations on Document. Also TextProxy is not a {@link module:engine/view/node~Node} so it can not be\n * inserted as a child of {@link module:engine/view/element~Element}.\n *\n * `TextProxy` instances are created by {@link module:engine/view/treewalker~TreeWalker view tree walker}. You should not need to create\n * an instance of this class by your own.\n */\nexport default class TextProxy {\n\t/**\n\t * Creates a text proxy.\n\t *\n\t * @protected\n\t * @param {module:engine/view/text~Text} textNode Text node which part is represented by this text proxy.\n\t * @param {Number} offsetInText Offset in {@link module:engine/view/textproxy~TextProxy#textNode text node}\n\t * from which the text proxy starts.\n\t * @param {Number} length Text proxy length, that is how many text node's characters, starting from `offsetInText` it represents.\n\t * @constructor\n\t */\n\tconstructor( textNode, offsetInText, length ) {\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/text~Text} element which TextProxy is a substring.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/text~Text} module:engine/view/textproxy~TextProxy#textNode\n\t\t */\n\t\tthis.textNode = textNode;\n\n\t\tif ( offsetInText < 0 || offsetInText > textNode.data.length ) {\n\t\t\t/**\n\t\t\t * Given offsetInText value is incorrect.\n\t\t\t *\n\t\t\t * @error view-textproxy-wrong-offsetintext\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.', this );\n\t\t}\n\n\t\tif ( length < 0 || offsetInText + length > textNode.data.length ) {\n\t\t\t/**\n\t\t\t * Given length value is incorrect.\n\t\t\t *\n\t\t\t * @error view-textproxy-wrong-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-textproxy-wrong-length: Given length value is incorrect.', this );\n\t\t}\n\n\t\t/**\n\t\t * Text data represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:engine/view/textproxy~TextProxy#data\n\t\t */\n\t\tthis.data = textNode.data.substring( offsetInText, offsetInText + length );\n\n\t\t/**\n\t\t * Offset in the `textNode` where this `TextProxy` instance starts.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} module:engine/view/textproxy~TextProxy#offsetInText\n\t\t */\n\t\tthis.offsetInText = offsetInText;\n\t}\n\n\t/**\n\t * Offset size of this node.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Flag indicating whether `TextProxy` instance covers only part of the original {@link module:engine/view/text~Text text node}\n\t * (`true`) or the whole text node (`false`).\n\t *\n\t * This is `false` when text proxy starts at the very beginning of {@link module:engine/view/textproxy~TextProxy#textNode textNode}\n\t * ({@link module:engine/view/textproxy~TextProxy#offsetInText offsetInText} equals `0`) and text proxy sizes is equal to\n\t * text node size.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isPartial() {\n\t\treturn this.data.length !== this.textNode.data.length;\n\t}\n\n\t/**\n\t * Parent of this text proxy, which is same as parent of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tget parent() {\n\t\treturn this.textNode.parent;\n\t}\n\n\t/**\n\t * Root of this text proxy, which is same as root of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.textNode.root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/document~Document View document} that owns this text proxy, or `null` if the text proxy is inside\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this.textNode.document;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\ttextProxy.is( 'textProxy' ); // -> true\n\t *\t\ttextProxy.is( 'view:textProxy' ); // -> true\n\t *\n\t *\t\ttextProxy.is( 'model:textProxy' ); // -> false\n\t *\t\ttextProxy.is( 'element' ); // -> false\n\t *\t\ttextProxy.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'textProxy' || type == 'view:textProxy';\n\t}\n\n\t/**\n\t * Returns ancestors array of this text proxy.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` {#textNode} will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from text proxy parent to\n\t * root element, otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this.textNode : this.parent;\n\n\t\twhile ( parent !== null ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ViewTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/objecttomap\n */\n\n/**\n * Transforms object to map.\n *\n *\t\tconst map = objectToMap( { 'foo': 1, 'bar': 2 } );\n *\t\tmap.get( 'foo' ); // 1\n *\n * @param {Object} obj Object to transform.\n * @returns {Map} Map created from object.\n */\nexport default function objectToMap( obj ) {\n\tconst map = new Map();\n\n\tfor ( const key in obj ) {\n\t\tmap.set( key, obj[ key ] );\n\t}\n\n\treturn map;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/isiterable\n */\n\n/**\n * Checks if value implements iterator interface.\n *\n * @param {*} value The value to check.\n * @returns {Boolean} True if value implements iterator interface.\n */\nexport default function isIterable( value ) {\n\treturn !!( value && value[ Symbol.iterator ] );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/matcher\n */\n\n/**\n * View matcher class.\n * Instance of this class can be used to find {@link module:engine/view/element~Element elements} that match given pattern.\n */\nexport default class Matcher {\n\t/**\n\t * Creates new instance of Matcher.\n\t *\n\t * @param {String|RegExp|Object} [pattern] Match patterns. See {@link module:engine/view/matcher~Matcher#add add method} for\n\t * more information.\n\t */\n\tconstructor( ...pattern ) {\n\t\t/**\n\t\t * @private\n\t\t * @type {Array<String|RegExp|Object>}\n\t\t */\n\t\tthis._patterns = [];\n\n\t\tthis.add( ...pattern );\n\t}\n\n\t/**\n\t * Adds pattern or patterns to matcher instance.\n\t *\n\t *\t\t// String.\n\t *\t\tmatcher.add( 'div' );\n\t *\n\t *\t\t// Regular expression.\n\t *\t\tmatcher.add( /^\\w/ );\n\t *\n\t *\t\t// Single class.\n\t *\t\tmatcher.add( {\n\t *\t\t\tclasses: 'foobar'\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/view/matcher~MatcherPattern} for more examples.\n\t *\n\t * Multiple patterns can be added in one call:\n\t *\n\t * \t\tmatcher.add( 'div', { classes: 'foobar' } );\n\t *\n\t * @param {Object|String|RegExp|Function} pattern Object describing pattern details. If string or regular expression\n\t * is provided it will be used to match element's name. Pattern can be also provided in a form\n\t * of a function - then this function will be called with each {@link module:engine/view/element~Element element} as a parameter.\n\t * Function's return value will be stored under `match` key of the object returned from\n\t * {@link module:engine/view/matcher~Matcher#match match} or {@link module:engine/view/matcher~Matcher#matchAll matchAll} methods.\n\t * @param {String|RegExp} [pattern.name] Name or regular expression to match element's name.\n\t * @param {Object} [pattern.attributes] Object with key-value pairs representing attributes to match. Each object key\n\t * represents attribute name. Value under that key can be either:\n\t * * `true` - then attribute is just required (can be empty),\n\t * * a string - then attribute has to be equal, or\n\t * * a regular expression - then attribute has to match the expression.\n\t * @param {String|RegExp|Array} [pattern.classes] Class name or array of class names to match. Each name can be\n\t * provided in a form of string or regular expression.\n\t * @param {Object} [pattern.styles] Object with key-value pairs representing styles to match. Each object key\n\t * represents style name. Value under that key can be either a string or a regular expression and it will be used\n\t * to match style value.\n\t */\n\tadd( ...pattern ) {\n\t\tfor ( let item of pattern ) {\n\t\t\t// String or RegExp pattern is used as element's name.\n\t\t\tif ( typeof item == 'string' || item instanceof RegExp ) {\n\t\t\t\titem = { name: item };\n\t\t\t}\n\n\t\t\t// Single class name/RegExp can be provided.\n\t\t\tif ( item.classes && ( typeof item.classes == 'string' || item.classes instanceof RegExp ) ) {\n\t\t\t\titem.classes = [ item.classes ];\n\t\t\t}\n\n\t\t\tthis._patterns.push( item );\n\t\t}\n\t}\n\n\t/**\n\t * Matches elements for currently stored patterns. Returns match information about first found\n\t * {@link module:engine/view/element~Element element}, otherwise returns `null`.\n\t *\n\t * Example of returned object:\n\t *\n\t *\t\t{\n\t *\t\t\telement: <instance of found element>,\n\t *\t\t\tpattern: <pattern used to match found element>,\n\t *\t\t\tmatch: {\n\t *\t\t\t\tname: true,\n\t *\t\t\t\tattributes: [ 'title', 'href' ],\n\t *\t\t\t\tclasses: [ 'foo' ],\n\t *\t\t\t\tstyles: [ 'color', 'position' ]\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * @see module:engine/view/matcher~Matcher#add\n\t * @see module:engine/view/matcher~Matcher#matchAll\n\t * @param {...module:engine/view/element~Element} element View element to match against stored patterns.\n\t * @returns {Object|null} result\n\t * @returns {module:engine/view/element~Element} result.element Matched view element.\n\t * @returns {Object|String|RegExp|Function} result.pattern Pattern that was used to find matched element.\n\t * @returns {Object} result.match Object representing matched element parts.\n\t * @returns {Boolean} [result.match.name] True if name of the element was matched.\n\t * @returns {Array} [result.match.attributes] Array with matched attribute names.\n\t * @returns {Array} [result.match.classes] Array with matched class names.\n\t * @returns {Array} [result.match.styles] Array with matched style names.\n\t */\n\tmatch( ...element ) {\n\t\tfor ( const singleElement of element ) {\n\t\t\tfor ( const pattern of this._patterns ) {\n\t\t\t\tconst match = isElementMatching( singleElement, pattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\treturn {\n\t\t\t\t\t\telement: singleElement,\n\t\t\t\t\t\tpattern,\n\t\t\t\t\t\tmatch\n\t\t\t\t\t};\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Matches elements for currently stored patterns. Returns array of match information with all found\n\t * {@link module:engine/view/element~Element elements}. If no element is found - returns `null`.\n\t *\n\t * @see module:engine/view/matcher~Matcher#add\n\t * @see module:engine/view/matcher~Matcher#match\n\t * @param {...module:engine/view/element~Element} element View element to match against stored patterns.\n\t * @returns {Array.<Object>|null} Array with match information about found elements or `null`. For more information\n\t * see {@link module:engine/view/matcher~Matcher#match match method} description.\n\t */\n\tmatchAll( ...element ) {\n\t\tconst results = [];\n\n\t\tfor ( const singleElement of element ) {\n\t\t\tfor ( const pattern of this._patterns ) {\n\t\t\t\tconst match = isElementMatching( singleElement, pattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\tresults.push( {\n\t\t\t\t\t\telement: singleElement,\n\t\t\t\t\t\tpattern,\n\t\t\t\t\t\tmatch\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn results.length > 0 ? results : null;\n\t}\n\n\t/**\n\t * Returns the name of the element to match if there is exactly one pattern added to the matcher instance\n\t * and it matches element name defined by `string` (not `RegExp`). Otherwise, returns `null`.\n\t *\n\t * @returns {String|null} Element name trying to match.\n\t */\n\tgetElementName() {\n\t\tif ( this._patterns.length !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst pattern = this._patterns[ 0 ];\n\t\tconst name = pattern.name;\n\n\t\treturn ( typeof pattern != 'function' && name && !( name instanceof RegExp ) ) ? name : null;\n\t}\n}\n\n// Returns match information if {@link module:engine/view/element~Element element} is matching provided pattern.\n// If element cannot be matched to provided pattern - returns `null`.\n//\n// @param {module:engine/view/element~Element} element\n// @param {Object|String|RegExp|Function} pattern\n// @returns {Object|null} Returns object with match information or null if element is not matching.\nfunction isElementMatching( element, pattern ) {\n\t// If pattern is provided as function - return result of that function;\n\tif ( typeof pattern == 'function' ) {\n\t\treturn pattern( element );\n\t}\n\n\tconst match = {};\n\t// Check element's name.\n\tif ( pattern.name ) {\n\t\tmatch.name = matchName( pattern.name, element.name );\n\n\t\tif ( !match.name ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// Check element's attributes.\n\tif ( pattern.attributes ) {\n\t\tmatch.attributes = matchAttributes( pattern.attributes, element );\n\n\t\tif ( !match.attributes ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// Check element's classes.\n\tif ( pattern.classes ) {\n\t\tmatch.classes = matchClasses( pattern.classes, element );\n\n\t\tif ( !match.classes ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Check element's styles.\n\tif ( pattern.styles ) {\n\t\tmatch.styles = matchStyles( pattern.styles, element );\n\n\t\tif ( !match.styles ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if name can be matched by provided pattern.\n//\n// @param {String|RegExp} pattern\n// @param {String} name\n// @returns {Boolean} Returns `true` if name can be matched, `false` otherwise.\nfunction matchName( pattern, name ) {\n\t// If pattern is provided as RegExp - test against this regexp.\n\tif ( pattern instanceof RegExp ) {\n\t\treturn pattern.test( name );\n\t}\n\n\treturn pattern === name;\n}\n\n// Checks if attributes of provided element can be matched against provided patterns.\n//\n// @param {Object} patterns Object with information about attributes to match. Each key of the object will be\n// used as attribute name. Value of each key can be a string or regular expression to match against attribute value.\n// @param {module:engine/view/element~Element} element Element which attributes will be tested.\n// @returns {Array|null} Returns array with matched attribute names or `null` if no attributes were matched.\nfunction matchAttributes( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const name in patterns ) {\n\t\tconst pattern = patterns[ name ];\n\n\t\tif ( element.hasAttribute( name ) ) {\n\t\t\tconst attribute = element.getAttribute( name );\n\n\t\t\tif ( pattern === true ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else if ( pattern instanceof RegExp ) {\n\t\t\t\tif ( pattern.test( attribute ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t} else if ( attribute === pattern ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if classes of provided element can be matched against provided patterns.\n//\n// @param {Array.<String|RegExp>} patterns Array of strings or regular expressions to match against element's classes.\n// @param {module:engine/view/element~Element} element Element which classes will be tested.\n// @returns {Array|null} Returns array with matched class names or `null` if no classes were matched.\nfunction matchClasses( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const pattern of patterns ) {\n\t\tif ( pattern instanceof RegExp ) {\n\t\t\tconst classes = element.getClassNames();\n\n\t\t\tfor ( const name of classes ) {\n\t\t\t\tif ( pattern.test( name ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( match.length === 0 ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else if ( element.hasClass( pattern ) ) {\n\t\t\tmatch.push( pattern );\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n// Checks if styles of provided element can be matched against provided patterns.\n//\n// @param {Object} patterns Object with information about styles to match. Each key of the object will be\n// used as style name. Value of each key can be a string or regular expression to match against style value.\n// @param {module:engine/view/element~Element} element Element which styles will be tested.\n// @returns {Array|null} Returns array with matched style names or `null` if no styles were matched.\nfunction matchStyles( patterns, element ) {\n\tconst match = [];\n\n\tfor ( const name in patterns ) {\n\t\tconst pattern = patterns[ name ];\n\n\t\tif ( element.hasStyle( name ) ) {\n\t\t\tconst style = element.getStyle( name );\n\n\t\t\tif ( pattern instanceof RegExp ) {\n\t\t\t\tif ( pattern.test( style ) ) {\n\t\t\t\t\tmatch.push( name );\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t} else if ( style === pattern ) {\n\t\t\t\tmatch.push( name );\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t} else {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn match;\n}\n\n/**\n * An entity that is a valid pattern recognized by a matcher. `MatcherPattern` is used by {@link ~Matcher} to recognize\n * if a view element fits in a group of view elements described by the pattern.\n *\n * `MatcherPattern` can be given as a `String`, a `RegExp`, an `Object` or a `Function`.\n *\n * If `MatcherPattern` is given as a `String` or `RegExp`, it will match any view element that has a matching name:\n *\n *\t\t// Match any element with name equal to 'div'.\n *\t\tconst pattern = 'div';\n *\n *\t\t// Match any element which name starts on 'p'.\n *\t\tconst pattern = /^p/;\n *\n * If `MatcherPattern` is given as an `Object`, all the object's properties will be matched with view element properties.\n *\n *\t\t// Match view element's name.\n *\t\tconst pattern = { name: /^p/ };\n *\n *\t\t// Match view element which has matching attributes.\n *\t\tconst pattern = {\n *\t\t\tattributes: {\n *\t\t\t\ttitle: 'foobar',\t// Attribute title should equal 'foobar'.\n *\t\t\t\tfoo: /^\\w+/,\t\t// Attribute foo should match /^\\w+/ regexp.\n *\t\t\t\tbar: true\t\t\t// Attribute bar should be set (can be empty).\n *\t\t\t}\n *\t\t};\n *\n *\t\t// Match view element which has given class.\n *\t\tconst pattern = {\n *\t\t\tclasses: 'foobar'\n *\t\t};\n *\n *\t\t// Match view element class using regular expression.\n *\t\tconst pattern = {\n *\t\t\tclasses: /foo.../\n *\t\t};\n *\n *\t\t// Multiple classes to match.\n *\t\tconst pattern = {\n *\t\t\tclasses: [ 'baz', 'bar', /foo.../ ]\n *\t\t};\n *\n *\t\t// Match view element which has given styles.\n *\t\tconst pattern = {\n *\t\t\tstyles: {\n *\t\t\t\tposition: 'absolute',\n *\t\t\t\tcolor: /^\\w*blue$/\n *\t\t\t}\n *\t\t};\n *\n *\t\t// Pattern with multiple properties.\n *\t\tconst pattern = {\n *\t\t\tname: 'span',\n *\t\t\tstyles: {\n *\t\t\t\t'font-weight': 'bold'\n *\t\t\t},\n *\t\t\tclasses: 'highlighted'\n *\t\t};\n *\n * If `MatcherPattern` is given as a `Function`, the function takes a view element as a first and only parameter and\n * the function should decide whether that element matches. If so, it should return what part of the view element has been matched.\n * Otherwise, the function should return `null`. The returned result will be included in `match` property of the object\n * returned by {@link ~Matcher#match} call.\n *\n *\t\t// Match an empty <div> element.\n *\t\tconst pattern = element => {\n *\t\t\tif ( element.name == 'div' && element.childCount > 0 ) {\n *\t\t\t\t// Return which part of the element was matched.\n *\t\t\t\treturn { name: true };\n *\t\t\t}\n *\n *\t\t\treturn null;\n *\t\t};\n *\n *\t\t// Match a <p> element with big font (\"heading-like\" element).\n *\t\tconst pattern = element => {\n *\t\t\tif ( element.name == 'p' ) {\n *\t\t\t\tconst fontSize = element.getStyle( 'font-size' );\n *\t\t\t\tconst size = fontSize.match( /(\\d+)/px );\n *\n *\t\t\t\tif ( size && Number( size[ 1 ] ) > 26 ) {\n *\t\t\t\t\treturn { name: true, attribute: [ 'font-size' ] };\n *\t\t\t\t}\n *\t\t\t}\n *\n *\t\t\treturn null;\n *\t\t};\n *\n * `MatcherPattern` is defined in a way that it is a superset of {@link module:engine/view/elementdefinition~ElementDefinition},\n * that is, every `ElementDefinition` also can be used as a `MatcherPattern`.\n *\n * @typedef {String|RegExp|Object|Function} module:engine/view/matcher~MatcherPattern\n *\n * @property {String|RegExp} [name] View element name to match.\n * @property {String|RegExp|Array.<String|RegExp>} [classes] View element's class name(s) to match.\n * @property {Object} [styles] Object with key-value pairs representing styles to match.\n * Each object key represents style name. Value can be given as `String` or `RegExp`.\n * @property {Object} [attributes] Object with key-value pairs representing attributes to match.\n * Each object key represents attribute name. Value can be given as `String` or `RegExp`.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/element\n */\n\nimport Node from './node';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport objectToMap from '@ckeditor/ckeditor5-utils/src/objecttomap';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport Matcher from './matcher';\nimport { isPlainObject } from 'lodash-es';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToTags } = require( '../dev-utils/utils' );\n\n/**\n * View element.\n *\n * The editing engine does not define a fixed semantics of its elements (it is \"DTD-free\").\n * This is why the type of the {@link module:engine/view/element~Element} need to\n * be defined by the feature developer. When creating an element you should use one of the following methods:\n *\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createContainerElement `downcastWriter#createContainerElement()`}\n * in order to create a {@link module:engine/view/containerelement~ContainerElement},\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createAttributeElement `downcastWriter#createAttributeElement()`}\n * in order to create a {@link module:engine/view/attributeelement~AttributeElement},\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createEmptyElement `downcastWriter#createEmptyElement()`}\n * in order to create a {@link module:engine/view/emptyelement~EmptyElement}.\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`}\n * in order to create a {@link module:engine/view/uielement~UIElement}.\n * * {@link module:engine/view/downcastwriter~DowncastWriter#createEditableElement `downcastWriter#createEditableElement()`}\n * in order to create a {@link module:engine/view/editableelement~EditableElement}.\n *\n * Note that for view elements which are not created from the model, like elements from mutations, paste or\n * {@link module:engine/controller/datacontroller~DataController#set data.set} it is not possible to define the type of the element.\n * In such cases the {@link module:engine/view/upcastwriter~UpcastWriter#createElement `UpcastWriter#createElement()`} method\n * should be used to create generic view elements.\n *\n * @extends module:engine/view/node~Node\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a view element.\n\t *\n\t * Attributes can be passed in various formats:\n\t *\n\t *\t\tnew Element( 'div', { class: 'editor', contentEditable: 'true' } ); // object\n\t *\t\tnew Element( 'div', [ [ 'class', 'editor' ], [ 'contentEditable', 'true' ] ] ); // map-like iterator\n\t *\t\tnew Element( 'div', mapOfAttributes ); // map\n\t *\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attrs] Collection of attributes.\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * Name of the element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Map of attributes, where attributes names are keys and attributes values are values.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map} #_attrs\n\t\t */\n\t\tthis._attrs = parseAttributes( attrs );\n\n\t\t/**\n\t\t * Array of child nodes.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis._children = [];\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\n\t\t/**\n\t\t * Set of classes associated with element instance.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._classes = new Set();\n\n\t\tif ( this._attrs.has( 'class' ) ) {\n\t\t\t// Remove class attribute and handle it by class set.\n\t\t\tconst classString = this._attrs.get( 'class' );\n\t\t\tparseClasses( this._classes, classString );\n\t\t\tthis._attrs.delete( 'class' );\n\t\t}\n\n\t\t/**\n\t\t * Map of styles.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map} module:engine/view/element~Element#_styles\n\t\t */\n\t\tthis._styles = new Map();\n\n\t\tif ( this._attrs.has( 'style' ) ) {\n\t\t\t// Remove style attribute and handle it by styles map.\n\t\t\tparseInlineStyles( this._styles, this._attrs.get( 'style' ) );\n\t\t\tthis._attrs.delete( 'style' );\n\t\t}\n\n\t\t/**\n\t\t * Map of custom properties.\n\t\t * Custom properties can be added to element instance, will be cloned but not rendered into DOM.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map}\n\t\t */\n\t\tthis._customProperties = new Map();\n\t}\n\n\t/**\n\t * Number of element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this._children.length === 0;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\telement.is( 'element' ); // -> true\n\t *\t\telement.is( 'node' ); // -> true\n\t *\t\telement.is( 'view:element' ); // -> true\n\t *\t\telement.is( 'view:node' ); // -> true\n\t *\n\t *\t\telement.is( 'model:element' ); // -> false\n\t *\t\telement.is( 'documentSelection' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/view/element~Element#name name}:\n\t *\n\t *\t\telement.is( 'img' ); // -> true if this is an <img> element\n\t *\t\telement.is( 'element', 'img' ); // -> same as above\n\t *\t\ttext.is( 'img' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'element' || cutType == this.name || super.is( type );\n\t\t} else {\n\t\t\treturn cutType == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Gets child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/view/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children[ index ];\n\t}\n\n\t/**\n\t * Gets index of the given child node. Returns `-1` if child node is not found.\n\t *\n\t * @param {module:engine/view/node~Node} node Child node.\n\t * @returns {Number} Index of the child node.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.indexOf( node );\n\t}\n\n\t/**\n\t * Gets child nodes iterator.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>} Child nodes iterator.\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an iterator that contains the keys for attributes. Order of inserting attributes is not preserved.\n\t *\n\t * @returns {Iterable.<String>} Keys for attributes.\n\t */\n\t* getAttributeKeys() {\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield 'class';\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield 'style';\n\t\t}\n\n\t\tyield* this._attrs.keys();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this element's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getAttributes() {\n\t\tyield* this._attrs.entries();\n\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield [ 'class', this.getAttribute( 'class' ) ];\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield [ 'style', this.getAttribute( 'style' ) ];\n\t\t}\n\t}\n\n\t/**\n\t * Gets attribute by key. If attribute is not present - returns undefined.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {String|undefined} Attribute value.\n\t */\n\tgetAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\treturn [ ...this._classes ].join( ' ' );\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tlet styleString = '';\n\n\t\t\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\t\t\tstyleString += `${ property }:${ value };`;\n\t\t\t\t}\n\n\t\t\t\treturn styleString;\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns a boolean indicating whether an attribute with the specified key exists in the element.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} `true` if attribute with the specified key exists in the element, false otherwise.\n\t */\n\thasAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\treturn this._classes.size > 0;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\treturn this._styles.size > 0;\n\t\t}\n\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Checks if this element is similar to other element.\n\t * Both elements should have the same name and attributes to be considered as similar. Two similar elements\n\t * can contain different set of children nodes.\n\t *\n\t * @param {module:engine/view/element~Element} otherElement\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherElement ) {\n\t\tif ( !( otherElement instanceof Element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If exactly the same Element is provided - return true immediately.\n\t\tif ( this === otherElement ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Check element name.\n\t\tif ( this.name != otherElement.name ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check number of attributes, classes and styles.\n\t\tif ( this._attrs.size !== otherElement._attrs.size || this._classes.size !== otherElement._classes.size ||\n\t\t\tthis._styles.size !== otherElement._styles.size ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes are the same.\n\t\tfor ( const [ key, value ] of this._attrs ) {\n\t\t\tif ( !otherElement._attrs.has( key ) || otherElement._attrs.get( key ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if classes are the same.\n\t\tfor ( const className of this._classes ) {\n\t\t\tif ( !otherElement._classes.has( className ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles are the same.\n\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\tif ( !otherElement._styles.has( property ) || otherElement._styles.get( property ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns true if class is present.\n\t * If more then one class is provided - returns true only when all classes are present.\n\t *\n\t *\t\telement.hasClass( 'foo' ); // Returns true if 'foo' class is present.\n\t *\t\telement.hasClass( 'foo', 'bar' ); // Returns true if 'foo' and 'bar' classes are both present.\n\t *\n\t * @param {...String} className\n\t */\n\thasClass( ...className ) {\n\t\tfor ( const name of className ) {\n\t\t\tif ( !this._classes.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns iterator that contains all class names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetClassNames() {\n\t\treturn this._classes.keys();\n\t}\n\n\t/**\n\t * Returns style value for given property.\n\t * Undefined is returned if style does not exist.\n\t *\n\t * @param {String} property\n\t * @returns {String|undefined}\n\t */\n\tgetStyle( property ) {\n\t\treturn this._styles.get( property );\n\t}\n\n\t/**\n\t * Returns iterator that contains all style names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetStyleNames() {\n\t\treturn this._styles.keys();\n\t}\n\n\t/**\n\t * Returns true if style keys are present.\n\t * If more then one style property is provided - returns true only when all properties are present.\n\t *\n\t *\t\telement.hasStyle( 'color' ); // Returns true if 'border-top' style is present.\n\t *\t\telement.hasStyle( 'color', 'border-top' ); // Returns true if 'color' and 'border-top' styles are both present.\n\t *\n\t * @param {...String} property\n\t */\n\thasStyle( ...property ) {\n\t\tfor ( const name of property ) {\n\t\t\tif ( !this._styles.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns ancestor element that match specified pattern.\n\t * Provided patterns should be compatible with {@link module:engine/view/matcher~Matcher Matcher} as it is used internally.\n\t *\n\t * @see module:engine/view/matcher~Matcher\n\t * @param {Object|String|RegExp|Function} patterns Patterns used to match correct ancestor.\n\t * See {@link module:engine/view/matcher~Matcher}.\n\t * @returns {module:engine/view/element~Element|null} Found element or `null` if no matching ancestor was found.\n\t */\n\tfindAncestor( ...patterns ) {\n\t\tconst matcher = new Matcher( ...patterns );\n\t\tlet parent = this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tif ( matcher.match( parent ) ) {\n\t\t\t\treturn parent;\n\t\t\t}\n\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns the custom property value for the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @returns {*}\n\t */\n\tgetCustomProperty( key ) {\n\t\treturn this._customProperties.get( key );\n\t}\n\n\t/**\n\t * Returns an iterator which iterates over this element's custom properties.\n\t * Iterator provides `[ key, value ]` pairs for each stored property.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getCustomProperties() {\n\t\tyield* this._customProperties.entries();\n\t}\n\n\t/**\n\t * Returns identity string based on element's name, styles, classes and other attributes.\n\t * Two elements that {@link #isSimilar are similar} will have same identity string.\n\t * It has the following format:\n\t *\n\t *\t\t'name class=\"class1,class2\" style=\"style1:value1;style2:value2\" attr1=\"val1\" attr2=\"val2\"'\n \t *\n\t * For example:\n\t *\n\t *\t\tconst element = writer.createContainerElement( 'foo', {\n\t *\t\t\tbanana: '10',\n\t *\t\t\tapple: '20',\n\t *\t\t\tstyle: 'color: red; border-color: white;',\n\t *\t\t\tclass: 'baz'\n\t *\t\t} );\n\t *\n\t *\t\t// returns 'foo class=\"baz\" style=\"border-color:white;color:red\" apple=\"20\" banana=\"10\"'\n\t *\t\telement.getIdentity();\n\t *\n\t * NOTE: Classes, styles and other attributes are sorted alphabetically.\n\t *\n\t * @returns {String}\n\t */\n\tgetIdentity() {\n\t\tconst classes = Array.from( this._classes ).sort().join( ',' );\n\t\tconst styles = Array.from( this._styles ).map( i => `${ i[ 0 ] }:${ i[ 1 ] }` ).sort().join( ';' );\n\t\tconst attributes = Array.from( this._attrs ).map( i => `${ i[ 0 ] }=\"${ i[ 1 ] }\"` ).sort().join( ' ' );\n\n\t\treturn this.name +\n\t\t\t( classes == '' ? '' : ` class=\"${ classes }\"` ) +\n\t\t\t( styles == '' ? '' : ` style=\"${ styles }\"` ) +\n\t\t\t( attributes == '' ? '' : ` ${ attributes }` );\n\t}\n\n\t/**\n\t * Clones provided element.\n\t *\n\t * @protected\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/element~Element} Clone of this element.\n\t */\n\t_clone( deep = false ) {\n\t\tconst childrenClone = [];\n\n\t\tif ( deep ) {\n\t\t\tfor ( const child of this.getChildren() ) {\n\t\t\t\tchildrenClone.push( child._clone( deep ) );\n\t\t\t}\n\t\t}\n\n\t\t// ContainerElement and AttributeElement should be also cloned properly.\n\t\tconst cloned = new this.constructor( this.name, this._attrs, childrenClone );\n\n\t\t// Classes and styles are cloned separately - this solution is faster than adding them back to attributes and\n\t\t// parse once again in constructor.\n\t\tcloned._classes = new Set( this._classes );\n\t\tcloned._styles = new Map( this._styles );\n\n\t\t// Clone custom properties.\n\t\tcloned._customProperties = new Map( this._customProperties );\n\n\t\t// Clone filler offset method.\n\t\t// We can't define this method in a prototype because it's behavior which\n\t\t// is changed by e.g. toWidget() function from ckeditor5-widget. Perhaps this should be one of custom props.\n\t\tcloned.getFillerOffset = this.getFillerOffset;\n\n\t\treturn cloned;\n\t}\n\n\t/**\n\t * {@link module:engine/view/element~Element#_insertChild Insert} a child node or a list of child nodes at the end of this node\n\t * and sets the parent of these nodes to this element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#insert\n\t * @protected\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Number} Number of appended nodes.\n\t */\n\t_appendChild( items ) {\n\t\treturn this._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#insert\n\t * @protected\n\t * @param {Number} index Position where nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\t_insertChild( index, items ) {\n\t\tthis._fireChange( 'children', this );\n\t\tlet count = 0;\n\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\n\t\t\tthis._children.splice( index, 0, node );\n\t\t\tindex++;\n\t\t\tcount++;\n\t\t}\n\n\t\treturn count;\n\t}\n\n\t/**\n\t * Removes number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#remove\n\t * @protected\n\t * @param {Number} index Number of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Array.<module:engine/view/node~Node>} The array of removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tthis._fireChange( 'children', this );\n\n\t\tfor ( let i = index; i < index + howMany; i++ ) {\n\t\t\tthis._children[ i ].parent = null;\n\t\t}\n\n\t\treturn this._children.splice( index, howMany );\n\t}\n\n\t/**\n\t * Adds or overwrite attribute with a specified key and value.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setAttribute\n\t * @protected\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_setAttribute( key, value ) {\n\t\tvalue = String( value );\n\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( key == 'class' ) {\n\t\t\tparseClasses( this._classes, value );\n\t\t} else if ( key == 'style' ) {\n\t\t\tparseInlineStyles( this._styles, value );\n\t\t} else {\n\t\t\tthis._attrs.set( key, value );\n\t\t}\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeAttribute\n\t * @protected\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} Returns true if an attribute existed and has been removed.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeAttribute( key ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\t// Remove class attribute.\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\tthis._classes.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove style attribute.\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tthis._styles.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove other attributes.\n\t\treturn this._attrs.delete( key );\n\t}\n\n\t/**\n\t * Adds specified class.\n\t *\n\t *\t\telement._addClass( 'foo' ); // Adds 'foo' class.\n\t *\t\telement._addClass( [ 'foo', 'bar' ] ); // Adds 'foo' and 'bar' classes.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#addClass\n\t * @protected\n\t * @param {Array.<String>|String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_addClass( className ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tclassName = Array.isArray( className ) ? className : [ className ];\n\t\tclassName.forEach( name => this._classes.add( name ) );\n\t}\n\n\t/**\n\t * Removes specified class.\n\t *\n\t *\t\telement._removeClass( 'foo' ); // Removes 'foo' class.\n\t *\t\telement._removeClass( [ 'foo', 'bar' ] ); // Removes both 'foo' and 'bar' classes.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeClass\n\t * @protected\n\t * @param {Array.<String>|String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeClass( className ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tclassName = Array.isArray( className ) ? className : [ className ];\n\t\tclassName.forEach( name => this._classes.delete( name ) );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\telement._setStyle( 'color', 'red' );\n\t *\t\telement._setStyle( {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t} );\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setStyle\n\t * @protected\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_setStyle( property, value ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( isPlainObject( property ) ) {\n\t\t\tconst keys = Object.keys( property );\n\n\t\t\tfor ( const key of keys ) {\n\t\t\t\tthis._styles.set( key, property[ key ] );\n\t\t\t}\n\t\t} else {\n\t\t\tthis._styles.set( property, value );\n\t\t}\n\t}\n\n\t/**\n\t * Removes specified style.\n\t *\n\t *\t\telement._removeStyle( 'color' ); // Removes 'color' style.\n\t *\t\telement._removeStyle( [ 'color', 'border-top' ] ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeStyle\n\t * @protected\n\t * @param {Array.<String>|String} property\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_removeStyle( property ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tproperty = Array.isArray( property ) ? property : [ property ];\n\t\tproperty.forEach( name => this._styles.delete( name ) );\n\t}\n\n\t/**\n\t * Sets a custom property. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#setCustomProperty\n\t * @protected\n\t * @param {String|Symbol} key\n\t * @param {*} value\n\t */\n\t_setCustomProperty( key, value ) {\n\t\tthis._customProperties.set( key, value );\n\t}\n\n\t/**\n\t * Removes the custom property stored under the given key.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#removeCustomProperty\n\t * @protected\n\t * @param {String|Symbol} key\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\t_removeCustomProperty( key ) {\n\t\treturn this._customProperties.delete( key );\n\t}\n\n\t/**\n\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t *\n\t * @abstract\n\t * @method module:engine/view/element~Element#getFillerOffset\n\t */\n\n\t// @if CK_DEBUG_ENGINE // printTree( level = 0) {\n\t// @if CK_DEBUG_ENGINE // \tlet string = '';\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\t'.repeat( level ) + `<${ this.name }${ convertMapToTags( this.getAttributes() ) }>`;\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + '\\t'.repeat( level + 1 ) + child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + child.printTree( level + 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tif ( this.childCount ) {\n\t// @if CK_DEBUG_ENGINE //\t\tstring += '\\n' + '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += `</${ this.name }>`;\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Parses attributes provided to the element constructor before they are applied to an element. If attributes are passed\n// as an object (instead of `Map`), the object is transformed to the map. Attributes with `null` value are removed.\n// Attributes with non-`String` value are converted to `String`.\n//\n// @param {Object|Map} attrs Attributes to parse.\n// @returns {Map} Parsed attributes.\nfunction parseAttributes( attrs ) {\n\tif ( isPlainObject( attrs ) ) {\n\t\tattrs = objectToMap( attrs );\n\t} else {\n\t\tattrs = new Map( attrs );\n\t}\n\n\tfor ( const [ key, value ] of attrs ) {\n\t\tif ( value === null ) {\n\t\t\tattrs.delete( key );\n\t\t} else if ( typeof value != 'string' ) {\n\t\t\tattrs.set( key, String( value ) );\n\t\t}\n\t}\n\n\treturn attrs;\n}\n\n// Parses inline styles and puts property - value pairs into styles map.\n// Styles map is cleared before insertion.\n//\n// @param {Map.<String, String>} stylesMap Map to insert parsed properties and values.\n// @param {String} stylesString Styles to parse.\nfunction parseInlineStyles( stylesMap, stylesString ) {\n\t// `null` if no quote was found in input string or last found quote was a closing quote. See below.\n\tlet quoteType = null;\n\tlet propertyNameStart = 0;\n\tlet propertyValueStart = 0;\n\tlet propertyName = null;\n\n\tstylesMap.clear();\n\n\t// Do not set anything if input string is empty.\n\tif ( stylesString === '' ) {\n\t\treturn;\n\t}\n\n\t// Fix inline styles that do not end with `;` so they are compatible with algorithm below.\n\tif ( stylesString.charAt( stylesString.length - 1 ) != ';' ) {\n\t\tstylesString = stylesString + ';';\n\t}\n\n\t// Seek the whole string for \"special characters\".\n\tfor ( let i = 0; i < stylesString.length; i++ ) {\n\t\tconst char = stylesString.charAt( i );\n\n\t\tif ( quoteType === null ) {\n\t\t\t// No quote found yet or last found quote was a closing quote.\n\t\t\tswitch ( char ) {\n\t\t\t\tcase ':':\n\t\t\t\t\t// Most of time colon means that property name just ended.\n\t\t\t\t\t// Sometimes however `:` is found inside property value (for example in background image url).\n\t\t\t\t\tif ( !propertyName ) {\n\t\t\t\t\t\t// Treat this as end of property only if property name is not already saved.\n\t\t\t\t\t\t// Save property name.\n\t\t\t\t\t\tpropertyName = stylesString.substr( propertyNameStart, i - propertyNameStart );\n\t\t\t\t\t\t// Save this point as the start of property value.\n\t\t\t\t\t\tpropertyValueStart = i + 1;\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase '\"':\n\t\t\t\tcase '\\'':\n\t\t\t\t\t// Opening quote found (this is an opening quote, because `quoteType` is `null`).\n\t\t\t\t\tquoteType = char;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase ';': {\n\t\t\t\t\t// Property value just ended.\n\t\t\t\t\t// Use previously stored property value start to obtain property value.\n\t\t\t\t\tconst propertyValue = stylesString.substr( propertyValueStart, i - propertyValueStart );\n\n\t\t\t\t\tif ( propertyName ) {\n\t\t\t\t\t\t// Save parsed part.\n\t\t\t\t\t\tstylesMap.set( propertyName.trim(), propertyValue.trim() );\n\t\t\t\t\t}\n\n\t\t\t\t\tpropertyName = null;\n\n\t\t\t\t\t// Save this point as property name start. Property name starts immediately after previous property value ends.\n\t\t\t\t\tpropertyNameStart = i + 1;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else if ( char === quoteType ) {\n\t\t\t// If a quote char is found and it is a closing quote, mark this fact by `null`-ing `quoteType`.\n\t\t\tquoteType = null;\n\t\t}\n\t}\n}\n\n// Parses class attribute and puts all classes into classes set.\n// Classes set s cleared before insertion.\n//\n// @param {Set.<String>} classesSet Set to insert parsed classes.\n// @param {String} classesString String with classes to parse.\nfunction parseClasses( classesSet, classesString ) {\n\tconst classArray = classesString.split( /\\s+/ );\n\tclassesSet.clear();\n\tclassArray.forEach( name => classesSet.add( name ) );\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/view/item~Item|Iterable.<String|module:engine/view/item~Item>}\n// @returns {Iterable.<module:engine/view/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/containerelement\n */\n\nimport Element from './element';\n\n/**\n * Containers are elements which define document structure. They define boundaries for\n * {@link module:engine/view/attributeelement~AttributeElement attributes}. They are mostly used for block elements like `<p>` or `<div>`.\n *\n * Editing engine does not define a fixed HTML DTD. This is why a feature developer needs to choose between various\n * types (container element, {@link module:engine/view/attributeelement~AttributeElement attribute element},\n * {@link module:engine/view/emptyelement~EmptyElement empty element}, etc) when developing a feature.\n *\n * The container element should be your default choice when writing a converter, unless:\n *\n * * this element represents a model text attribute (then use {@link module:engine/view/attributeelement~AttributeElement}),\n * * this is an empty element like `<img>` (then use {@link module:engine/view/emptyelement~EmptyElement}),\n * * this is a root element,\n * * this is a nested editable element (then use {@link module:engine/view/editableelement~EditableElement}).\n *\n * To create a new container element instance use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createContainerElement `DowncastWriter#createContainerElement()`}\n * method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class ContainerElement extends Element {\n\t/**\n\t * Creates a container element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createContainerElement\n\t * @see module:engine/view/element~Element\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tcontainerElement.is( 'containerElement' ); // -> true\n\t *\t\tcontainerElement.is( 'element' ); // -> true\n\t *\t\tcontainerElement.is( 'node' ); // -> true\n\t *\t\tcontainerElement.is( 'view:containerElement' ); // -> true\n\t *\t\tcontainerElement.is( 'view:element' ); // -> true\n\t *\t\tcontainerElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tcontainerElement.is( 'model:element' ); // -> false\n\t *\t\tcontainerElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is a container element, you can also check its\n\t * {@link module:engine/view/containerelement~ContainerElement#name name}:\n\t *\n\t *\t\tcontainerElement.is( 'div' ); // -> true if this is a div container element\n\t *\t\tcontainerElement.is( 'contaienrElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'containerElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'containerElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n}\n\n/**\n * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n *\n * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n */\nexport function getFillerOffset() {\n\tconst children = [ ...this.getChildren() ];\n\tconst lastChild = children[ this.childCount - 1 ];\n\n\t// Block filler is required after a `<br>` if it's the last element in its container. See #1422.\n\tif ( lastChild && lastChild.is( 'element', 'br' ) ) {\n\t\treturn this.childCount;\n\t}\n\n\tfor ( const child of children ) {\n\t\t// If there's any non-UI element – don't render the bogus.\n\t\tif ( !child.is( 'uiElement' ) ) {\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t// If there are only UI elements – render the bogus at the end of the element.\n\treturn this.childCount;\n}\n","/**\n * This method returns the first argument it receives.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Util\n * @param {*} value Any value.\n * @returns {*} Returns `value`.\n * @example\n *\n * var object = { 'a': 1 };\n *\n * console.log(_.identity(object) === object);\n * // => true\n */\nfunction identity(value) {\n return value;\n}\n\nexport default identity;\n","/**\n * A faster alternative to `Function#apply`, this function invokes `func`\n * with the `this` binding of `thisArg` and the arguments of `args`.\n *\n * @private\n * @param {Function} func The function to invoke.\n * @param {*} thisArg The `this` binding of `func`.\n * @param {Array} args The arguments to invoke `func` with.\n * @returns {*} Returns the result of `func`.\n */\nfunction apply(func, thisArg, args) {\n switch (args.length) {\n case 0: return func.call(thisArg);\n case 1: return func.call(thisArg, args[0]);\n case 2: return func.call(thisArg, args[0], args[1]);\n case 3: return func.call(thisArg, args[0], args[1], args[2]);\n }\n return func.apply(thisArg, args);\n}\n\nexport default apply;\n","import apply from './_apply.js';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max;\n\n/**\n * A specialized version of `baseRest` which transforms the rest array.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @param {Function} transform The rest array transform.\n * @returns {Function} Returns the new function.\n */\nfunction overRest(func, start, transform) {\n start = nativeMax(start === undefined ? (func.length - 1) : start, 0);\n return function() {\n var args = arguments,\n index = -1,\n length = nativeMax(args.length - start, 0),\n array = Array(length);\n\n while (++index < length) {\n array[index] = args[start + index];\n }\n index = -1;\n var otherArgs = Array(start + 1);\n while (++index < start) {\n otherArgs[index] = args[index];\n }\n otherArgs[start] = transform(array);\n return apply(func, this, otherArgs);\n };\n}\n\nexport default overRest;\n","/**\n * Creates a function that returns `value`.\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Util\n * @param {*} value The value to return from the new function.\n * @returns {Function} Returns the new constant function.\n * @example\n *\n * var objects = _.times(2, _.constant({ 'a': 1 }));\n *\n * console.log(objects);\n * // => [{ 'a': 1 }, { 'a': 1 }]\n *\n * console.log(objects[0] === objects[1]);\n * // => true\n */\nfunction constant(value) {\n return function() {\n return value;\n };\n}\n\nexport default constant;\n","import constant from './constant.js';\nimport defineProperty from './_defineProperty.js';\nimport identity from './identity.js';\n\n/**\n * The base implementation of `setToString` without support for hot loop shorting.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\nvar baseSetToString = !defineProperty ? identity : function(func, string) {\n return defineProperty(func, 'toString', {\n 'configurable': true,\n 'enumerable': false,\n 'value': constant(string),\n 'writable': true\n });\n};\n\nexport default baseSetToString;\n","/** Used to detect hot functions by number of calls within a span of milliseconds. */\nvar HOT_COUNT = 800,\n HOT_SPAN = 16;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeNow = Date.now;\n\n/**\n * Creates a function that'll short out and invoke `identity` instead\n * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`\n * milliseconds.\n *\n * @private\n * @param {Function} func The function to restrict.\n * @returns {Function} Returns the new shortable function.\n */\nfunction shortOut(func) {\n var count = 0,\n lastCalled = 0;\n\n return function() {\n var stamp = nativeNow(),\n remaining = HOT_SPAN - (stamp - lastCalled);\n\n lastCalled = stamp;\n if (remaining > 0) {\n if (++count >= HOT_COUNT) {\n return arguments[0];\n }\n } else {\n count = 0;\n }\n return func.apply(undefined, arguments);\n };\n}\n\nexport default shortOut;\n","import baseSetToString from './_baseSetToString.js';\nimport shortOut from './_shortOut.js';\n\n/**\n * Sets the `toString` method of `func` to return `string`.\n *\n * @private\n * @param {Function} func The function to modify.\n * @param {Function} string The `toString` result.\n * @returns {Function} Returns `func`.\n */\nvar setToString = shortOut(baseSetToString);\n\nexport default setToString;\n","import identity from './identity.js';\nimport overRest from './_overRest.js';\nimport setToString from './_setToString.js';\n\n/**\n * The base implementation of `_.rest` which doesn't validate or coerce arguments.\n *\n * @private\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @returns {Function} Returns the new function.\n */\nfunction baseRest(func, start) {\n return setToString(overRest(func, start, identity), func + '');\n}\n\nexport default baseRest;\n","import copyObject from './_copyObject.js';\nimport createAssigner from './_createAssigner.js';\nimport keysIn from './keysIn.js';\n\n/**\n * This method is like `_.assign` except that it iterates over own and\n * inherited source properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extend\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assign\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assignIn({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }\n */\nvar assignIn = createAssigner(function(object, source) {\n copyObject(source, keysIn(source), object);\n});\n\nexport default assignIn;\n","import baseRest from './_baseRest.js';\nimport isIterateeCall from './_isIterateeCall.js';\n\n/**\n * Creates a function like `_.assign`.\n *\n * @private\n * @param {Function} assigner The function to assign values.\n * @returns {Function} Returns the new assigner function.\n */\nfunction createAssigner(assigner) {\n return baseRest(function(object, sources) {\n var index = -1,\n length = sources.length,\n customizer = length > 1 ? sources[length - 1] : undefined,\n guard = length > 2 ? sources[2] : undefined;\n\n customizer = (assigner.length > 3 && typeof customizer == 'function')\n ? (length--, customizer)\n : undefined;\n\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n customizer = length < 3 ? undefined : customizer;\n length = 1;\n }\n object = Object(object);\n while (++index < length) {\n var source = sources[index];\n if (source) {\n assigner(object, source, index, customizer);\n }\n }\n return object;\n });\n}\n\nexport default createAssigner;\n","import eq from './eq.js';\nimport isArrayLike from './isArrayLike.js';\nimport isIndex from './_isIndex.js';\nimport isObject from './isObject.js';\n\n/**\n * Checks if the given arguments are from an iteratee call.\n *\n * @private\n * @param {*} value The potential iteratee value argument.\n * @param {*} index The potential iteratee index or key argument.\n * @param {*} object The potential iteratee object argument.\n * @returns {boolean} Returns `true` if the arguments are from an iteratee call,\n * else `false`.\n */\nfunction isIterateeCall(value, index, object) {\n if (!isObject(object)) {\n return false;\n }\n var type = typeof index;\n if (type == 'number'\n ? (isArrayLike(object) && isIndex(index, object.length))\n : (type == 'string' && index in object)\n ) {\n return eq(object[index], value);\n }\n return false;\n}\n\nexport default isIterateeCall;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/observablemixin\n */\n\nimport EmitterMixin from './emittermixin';\nimport CKEditorError from './ckeditorerror';\nimport { extend, isObject } from 'lodash-es';\n\nconst observablePropertiesSymbol = Symbol( 'observableProperties' );\nconst boundObservablesSymbol = Symbol( 'boundObservables' );\nconst boundPropertiesSymbol = Symbol( 'boundProperties' );\n\n/**\n * Mixin that injects the \"observable properties\" and data binding functionality described in the\n * {@link ~Observable} interface.\n *\n * Read more about the concept of observables in the:\n * * {@glink framework/guides/architecture/core-editor-architecture#event-system-and-observables \"Event system and observables\"}\n * section of the {@glink framework/guides/architecture/core-editor-architecture \"Core editor architecture\"} guide,\n * * {@glink framework/guides/deep-dive/observables \"Observables\" deep dive} guide.\n *\n * @mixin ObservableMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/observablemixin~Observable\n */\nconst ObservableMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tset( name, value ) {\n\t\t// If the first parameter is an Object, iterate over its properties.\n\t\tif ( isObject( name ) ) {\n\t\t\tObject.keys( name ).forEach( property => {\n\t\t\t\tthis.set( property, name[ property ] );\n\t\t\t}, this );\n\n\t\t\treturn;\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst properties = this[ observablePropertiesSymbol ];\n\n\t\tif ( ( name in this ) && !properties.has( name ) ) {\n\t\t\t/**\n\t\t\t * Cannot override an existing property.\n\t\t\t *\n\t\t\t * This error is thrown when trying to {@link ~Observable#set set} an property with\n\t\t\t * a name of an already existing property. For example:\n\t\t\t *\n\t\t\t *\t\tlet observable = new Model();\n\t\t\t *\t\tobservable.property = 1;\n\t\t\t *\t\tobservable.set( 'property', 2 );\t\t\t// throws\n\t\t\t *\n\t\t\t *\t\tobservable.set( 'property', 1 );\n\t\t\t *\t\tobservable.set( 'property', 2 );\t\t\t// ok, because this is an existing property.\n\t\t\t *\n\t\t\t * @error observable-set-cannot-override\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-set-cannot-override: Cannot override an existing property.', this );\n\t\t}\n\n\t\tObject.defineProperty( this, name, {\n\t\t\tenumerable: true,\n\t\t\tconfigurable: true,\n\n\t\t\tget() {\n\t\t\t\treturn properties.get( name );\n\t\t\t},\n\n\t\t\tset( value ) {\n\t\t\t\tconst oldValue = properties.get( name );\n\n\t\t\t\t// Fire `set` event before the new value will be set to make it possible\n\t\t\t\t// to override observable property without affecting `change` event.\n\t\t\t\t// See https://github.com/ckeditor/ckeditor5-utils/issues/171.\n\t\t\t\tlet newValue = this.fire( 'set:' + name, name, value, oldValue );\n\n\t\t\t\tif ( newValue === undefined ) {\n\t\t\t\t\tnewValue = value;\n\t\t\t\t}\n\n\t\t\t\t// Allow undefined as an initial value like A.define( 'x', undefined ) (#132).\n\t\t\t\t// Note: When properties map has no such own property, then its value is undefined.\n\t\t\t\tif ( oldValue !== newValue || !properties.has( name ) ) {\n\t\t\t\t\tproperties.set( name, newValue );\n\t\t\t\t\tthis.fire( 'change:' + name, name, newValue, oldValue );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\n\t\tthis[ name ] = value;\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tbind( ...bindProperties ) {\n\t\tif ( !bindProperties.length || !isStringArray( bindProperties ) ) {\n\t\t\t/**\n\t\t\t * All properties must be strings.\n\t\t\t *\n\t\t\t * @error observable-bind-wrong-properties\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-wrong-properties: All properties must be strings.', this );\n\t\t}\n\n\t\tif ( ( new Set( bindProperties ) ).size !== bindProperties.length ) {\n\t\t\t/**\n\t\t\t * Properties must be unique.\n\t\t\t *\n\t\t\t * @error observable-bind-duplicate-properties\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-duplicate-properties: Properties must be unique.', this );\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst boundProperties = this[ boundPropertiesSymbol ];\n\n\t\tbindProperties.forEach( propertyName => {\n\t\t\tif ( boundProperties.has( propertyName ) ) {\n\t\t\t\t/**\n\t\t\t\t * Cannot bind the same property more than once.\n\t\t\t\t *\n\t\t\t\t * @error observable-bind-rebind\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-bind-rebind: Cannot bind the same property more than once.', this );\n\t\t\t}\n\t\t} );\n\n\t\tconst bindings = new Map();\n\n\t\t// @typedef {Object} Binding\n\t\t// @property {Array} property Property which is bound.\n\t\t// @property {Array} to Array of observable–property components of the binding (`{ observable: ..., property: .. }`).\n\t\t// @property {Array} callback A function which processes `to` components.\n\t\tbindProperties.forEach( a => {\n\t\t\tconst binding = { property: a, to: [] };\n\n\t\t\tboundProperties.set( a, binding );\n\t\t\tbindings.set( a, binding );\n\t\t} );\n\n\t\t// @typedef {Object} BindChain\n\t\t// @property {Function} to See {@link ~ObservableMixin#_bindTo}.\n\t\t// @property {Function} toMany See {@link ~ObservableMixin#_bindToMany}.\n\t\t// @property {module:utils/observablemixin~Observable} _observable The observable which initializes the binding.\n\t\t// @property {Array} _bindProperties Array of `_observable` properties to be bound.\n\t\t// @property {Array} _to Array of `to()` observable–properties (`{ observable: toObservable, properties: ...toProperties }`).\n\t\t// @property {Map} _bindings Stores bindings to be kept in\n\t\t// {@link ~ObservableMixin#_boundProperties}/{@link ~ObservableMixin#_boundObservables}\n\t\t// initiated in this binding chain.\n\t\treturn {\n\t\t\tto: bindTo,\n\t\t\ttoMany: bindToMany,\n\n\t\t\t_observable: this,\n\t\t\t_bindProperties: bindProperties,\n\t\t\t_to: [],\n\t\t\t_bindings: bindings\n\t\t};\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tunbind( ...unbindProperties ) {\n\t\t// Nothing to do here if not inited yet.\n\t\tif ( !( observablePropertiesSymbol in this ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst boundProperties = this[ boundPropertiesSymbol ];\n\t\tconst boundObservables = this[ boundObservablesSymbol ];\n\n\t\tif ( unbindProperties.length ) {\n\t\t\tif ( !isStringArray( unbindProperties ) ) {\n\t\t\t\t/**\n\t\t\t\t * Properties must be strings.\n\t\t\t\t *\n\t\t\t\t * @error observable-unbind-wrong-properties\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-unbind-wrong-properties: Properties must be strings.', this );\n\t\t\t}\n\n\t\t\tunbindProperties.forEach( propertyName => {\n\t\t\t\tconst binding = boundProperties.get( propertyName );\n\n\t\t\t\t// Nothing to do if the binding is not defined\n\t\t\t\tif ( !binding ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tlet toObservable, toProperty, toProperties, toPropertyBindings;\n\n\t\t\t\tbinding.to.forEach( to => {\n\t\t\t\t\t// TODO: ES6 destructuring.\n\t\t\t\t\ttoObservable = to[ 0 ];\n\t\t\t\t\ttoProperty = to[ 1 ];\n\t\t\t\t\ttoProperties = boundObservables.get( toObservable );\n\t\t\t\t\ttoPropertyBindings = toProperties[ toProperty ];\n\n\t\t\t\t\ttoPropertyBindings.delete( binding );\n\n\t\t\t\t\tif ( !toPropertyBindings.size ) {\n\t\t\t\t\t\tdelete toProperties[ toProperty ];\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( !Object.keys( toProperties ).length ) {\n\t\t\t\t\t\tboundObservables.delete( toObservable );\n\t\t\t\t\t\tthis.stopListening( toObservable, 'change' );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t\tboundProperties.delete( propertyName );\n\t\t\t} );\n\t\t} else {\n\t\t\tboundObservables.forEach( ( bindings, boundObservable ) => {\n\t\t\t\tthis.stopListening( boundObservable, 'change' );\n\t\t\t} );\n\n\t\t\tboundObservables.clear();\n\t\t\tboundProperties.clear();\n\t\t}\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdecorate( methodName ) {\n\t\tconst originalMethod = this[ methodName ];\n\n\t\tif ( !originalMethod ) {\n\t\t\t/**\n\t\t\t * Cannot decorate an undefined method.\n\t\t\t *\n\t\t\t * @error observablemixin-cannot-decorate-undefined\n\t\t\t * @param {Object} object The object which method should be decorated.\n\t\t\t * @param {String} methodName Name of the method which does not exist.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'observablemixin-cannot-decorate-undefined: Cannot decorate an undefined method.',\n\t\t\t\tthis,\n\t\t\t\t{ object: this, methodName }\n\t\t\t);\n\t\t}\n\n\t\tthis.on( methodName, ( evt, args ) => {\n\t\t\tevt.return = originalMethod.apply( this, args );\n\t\t} );\n\n\t\tthis[ methodName ] = function( ...args ) {\n\t\t\treturn this.fire( methodName, args );\n\t\t};\n\t}\n};\n\nextend( ObservableMixin, EmitterMixin );\n\nexport default ObservableMixin;\n\n// Init symbol properties needed to for the observable mechanism to work.\n//\n// @private\n// @param {module:utils/observablemixin~ObservableMixin} observable\nfunction initObservable( observable ) {\n\t// Do nothing if already inited.\n\tif ( observablePropertiesSymbol in observable ) {\n\t\treturn;\n\t}\n\n\t// The internal hash containing the observable's state.\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, observablePropertiesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Map containing bindings to external observables. It shares the binding objects\n\t// (`{ observable: A, property: 'a', to: ... }`) with {@link module:utils/observablemixin~ObservableMixin#_boundProperties} and\n\t// it is used to observe external observables to update own properties accordingly.\n\t// See {@link module:utils/observablemixin~ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\tz: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t},\n\t//\t\t\t\tC: {\n\t//\t\t\t\t\tw: Set( [\n\t//\t\t\t\t\t\t{ observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundObservablesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Object that stores which properties of this observable are bound and how. It shares\n\t// the binding objects (`{ observable: A, property: 'a', to: ... }`) with\n\t// {@link module:utils/observablemixin~ObservableMixin#_boundObservables}. This data structure is\n\t// a reverse of {@link module:utils/observablemixin~ObservableMixin#_boundObservables} and it is helpful for\n\t// {@link module:utils/observablemixin~ObservableMixin#unbind}.\n\t//\n\t// See {@link module:utils/observablemixin~ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundProperties );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, property: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundProperties );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, property: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, property: 'c', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\td: { observable: A, property: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundPropertiesSymbol, {\n\t\tvalue: new Map()\n\t} );\n}\n\n// A chaining for {@link module:utils/observablemixin~ObservableMixin#bind} providing `.to()` interface.\n//\n// @private\n// @param {...[Observable|String|Function]} args Arguments of the `.to( args )` binding.\nfunction bindTo( ...args ) {\n\tconst parsedArgs = parseBindToArgs( ...args );\n\tconst bindingsKeys = Array.from( this._bindings.keys() );\n\tconst numberOfBindings = bindingsKeys.length;\n\n\t// Eliminate A.bind( 'x' ).to( B, C )\n\tif ( !parsedArgs.callback && parsedArgs.to.length > 1 ) {\n\t\t/**\n\t\t * Binding multiple observables only possible with callback.\n\t\t *\n\t\t * @error observable-bind-no-callback\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'observable-bind-to-no-callback: Binding multiple observables only possible with callback.',\n\t\t\tthis\n\t\t);\n\t}\n\n\t// Eliminate A.bind( 'x', 'y' ).to( B, callback )\n\tif ( numberOfBindings > 1 && parsedArgs.callback ) {\n\t\t/**\n\t\t * Cannot bind multiple properties and use a callback in one binding.\n\t\t *\n\t\t * @error observable-bind-to-extra-callback\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'observable-bind-to-extra-callback: Cannot bind multiple properties and use a callback in one binding.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tparsedArgs.to.forEach( to => {\n\t\t// Eliminate A.bind( 'x', 'y' ).to( B, 'a' )\n\t\tif ( to.properties.length && to.properties.length !== numberOfBindings ) {\n\t\t\t/**\n\t\t\t * The number of properties must match.\n\t\t\t *\n\t\t\t * @error observable-bind-to-properties-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-to-properties-length: The number of properties must match.', this );\n\t\t}\n\n\t\t// When no to.properties specified, observing source properties instead i.e.\n\t\t// A.bind( 'x', 'y' ).to( B ) -> Observe B.x and B.y\n\t\tif ( !to.properties.length ) {\n\t\t\tto.properties = this._bindProperties;\n\t\t}\n\t} );\n\n\tthis._to = parsedArgs.to;\n\n\t// Fill {@link BindChain#_bindings} with callback. When the callback is set there's only one binding.\n\tif ( parsedArgs.callback ) {\n\t\tthis._bindings.get( bindingsKeys[ 0 ] ).callback = parsedArgs.callback;\n\t}\n\n\tattachBindToListeners( this._observable, this._to );\n\n\t// Update observable._boundProperties and observable._boundObservables.\n\tupdateBindToBound( this );\n\n\t// Set initial values of bound properties.\n\tthis._bindProperties.forEach( propertyName => {\n\t\tupdateBoundObservableProperty( this._observable, propertyName );\n\t} );\n}\n\n// Binds to an attribute in a set of iterable observables.\n//\n// @private\n// @param {Array.<Observable>} observables\n// @param {String} attribute\n// @param {Function} callback\nfunction bindToMany( observables, attribute, callback ) {\n\tif ( this._bindings.size > 1 ) {\n\t\t/**\n\t\t * Binding one attribute to many observables only possible with one attribute.\n\t\t *\n\t\t * @error observable-bind-to-many-not-one-binding\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-many-not-one-binding: Cannot bind multiple properties with toMany().', this );\n\t}\n\n\tthis.to(\n\t\t// Bind to #attribute of each observable...\n\t\t...getBindingTargets( observables, attribute ),\n\t\t// ...using given callback to parse attribute values.\n\t\tcallback\n\t);\n}\n\n// Returns an array of binding components for\n// {@link Observable#bind} from a set of iterable observables.\n//\n// @param {Array.<Observable>} observables\n// @param {String} attribute\n// @returns {Array.<String|Observable>}\nfunction getBindingTargets( observables, attribute ) {\n\tconst observableAndAttributePairs = observables.map( observable => [ observable, attribute ] );\n\n\t// Merge pairs to one-dimension array of observables and attributes.\n\treturn Array.prototype.concat.apply( [], observableAndAttributePairs );\n}\n\n// Check if all entries of the array are of `String` type.\n//\n// @private\n// @param {Array} arr An array to be checked.\n// @returns {Boolean}\nfunction isStringArray( arr ) {\n\treturn arr.every( a => typeof a == 'string' );\n}\n\n// Parses and validates {@link Observable#bind}`.to( args )` arguments and returns\n// an object with a parsed structure. For example\n//\n//\t\tA.bind( 'x' ).to( B, 'a', C, 'b', call );\n//\n// becomes\n//\n//\t\t{\n//\t\t\tto: [\n//\t\t\t\t{ observable: B, properties: [ 'a' ] },\n//\t\t\t\t{ observable: C, properties: [ 'b' ] },\n//\t\t\t],\n//\t\t\tcallback: call\n// \t\t}\n//\n// @private\n// @param {...*} args Arguments of {@link Observable#bind}`.to( args )`.\n// @returns {Object}\nfunction parseBindToArgs( ...args ) {\n\t// Eliminate A.bind( 'x' ).to()\n\tif ( !args.length ) {\n\t\t/**\n\t\t * Invalid argument syntax in `to()`.\n\t\t *\n\t\t * @error observable-bind-to-parse-error\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.', null );\n\t}\n\n\tconst parsed = { to: [] };\n\tlet lastObservable;\n\n\tif ( typeof args[ args.length - 1 ] == 'function' ) {\n\t\tparsed.callback = args.pop();\n\t}\n\n\targs.forEach( a => {\n\t\tif ( typeof a == 'string' ) {\n\t\t\tlastObservable.properties.push( a );\n\t\t} else if ( typeof a == 'object' ) {\n\t\t\tlastObservable = { observable: a, properties: [] };\n\t\t\tparsed.to.push( lastObservable );\n\t\t} else {\n\t\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.', null );\n\t\t}\n\t} );\n\n\treturn parsed;\n}\n\n// Synchronizes {@link module:utils/observablemixin#_boundObservables} with {@link Binding}.\n//\n// @private\n// @param {Binding} binding A binding to store in {@link Observable#_boundObservables}.\n// @param {Observable} toObservable A observable, which is a new component of `binding`.\n// @param {String} toPropertyName A name of `toObservable`'s property, a new component of the `binding`.\nfunction updateBoundObservables( observable, binding, toObservable, toPropertyName ) {\n\tconst boundObservables = observable[ boundObservablesSymbol ];\n\tconst bindingsToObservable = boundObservables.get( toObservable );\n\tconst bindings = bindingsToObservable || {};\n\n\tif ( !bindings[ toPropertyName ] ) {\n\t\tbindings[ toPropertyName ] = new Set();\n\t}\n\n\t// Pass the binding to a corresponding Set in `observable._boundObservables`.\n\tbindings[ toPropertyName ].add( binding );\n\n\tif ( !bindingsToObservable ) {\n\t\tboundObservables.set( toObservable, bindings );\n\t}\n}\n\n// Synchronizes {@link Observable#_boundProperties} and {@link Observable#_boundObservables}\n// with {@link BindChain}.\n//\n// Assuming the following binding being created\n//\n// \t\tA.bind( 'a', 'b' ).to( B, 'x', 'y' );\n//\n// the following bindings were initialized by {@link Observable#bind} in {@link BindChain#_bindings}:\n//\n// \t\t{\n// \t\t\ta: { observable: A, property: 'a', to: [] },\n// \t\t\tb: { observable: A, property: 'b', to: [] },\n// \t\t}\n//\n// Iterate over all bindings in this chain and fill their `to` properties with\n// corresponding to( ... ) arguments (components of the binding), so\n//\n// \t\t{\n// \t\t\ta: { observable: A, property: 'a', to: [ B, 'x' ] },\n// \t\t\tb: { observable: A, property: 'b', to: [ B, 'y' ] },\n// \t\t}\n//\n// Then update the structure of {@link Observable#_boundObservables} with updated\n// binding, so it becomes:\n//\n// \t\tMap( {\n// \t\t\tB: {\n// \t\t\t\tx: Set( [\n// \t\t\t\t\t{ observable: A, property: 'a', to: [ [ B, 'x' ] ] }\n// \t\t\t\t] ),\n// \t\t\t\ty: Set( [\n// \t\t\t\t\t{ observable: A, property: 'b', to: [ [ B, 'y' ] ] },\n// \t\t\t\t] )\n//\t\t\t}\n// \t\t} )\n//\n// @private\n// @param {BindChain} chain The binding initialized by {@link Observable#bind}.\nfunction updateBindToBound( chain ) {\n\tlet toProperty;\n\n\tchain._bindings.forEach( ( binding, propertyName ) => {\n\t\t// Note: For a binding without a callback, this will run only once\n\t\t// like in A.bind( 'x', 'y' ).to( B, 'a', 'b' )\n\t\t// TODO: ES6 destructuring.\n\t\tchain._to.forEach( to => {\n\t\t\ttoProperty = to.properties[ binding.callback ? 0 : chain._bindProperties.indexOf( propertyName ) ];\n\n\t\t\tbinding.to.push( [ to.observable, toProperty ] );\n\t\t\tupdateBoundObservables( chain._observable, binding, to.observable, toProperty );\n\t\t} );\n\t} );\n}\n\n// Updates an property of a {@link Observable} with a value\n// determined by an entry in {@link Observable#_boundProperties}.\n//\n// @private\n// @param {Observable} observable A observable which property is to be updated.\n// @param {String} propertyName An property to be updated.\nfunction updateBoundObservableProperty( observable, propertyName ) {\n\tconst boundProperties = observable[ boundPropertiesSymbol ];\n\tconst binding = boundProperties.get( propertyName );\n\tlet propertyValue;\n\n\t// When a binding with callback is created like\n\t//\n\t// \t\tA.bind( 'a' ).to( B, 'b', C, 'c', callback );\n\t//\n\t// collect B.b and C.c, then pass them to callback to set A.a.\n\tif ( binding.callback ) {\n\t\tpropertyValue = binding.callback.apply( observable, binding.to.map( to => to[ 0 ][ to[ 1 ] ] ) );\n\t} else {\n\t\tpropertyValue = binding.to[ 0 ];\n\t\tpropertyValue = propertyValue[ 0 ][ propertyValue[ 1 ] ];\n\t}\n\n\tif ( observable.hasOwnProperty( propertyName ) ) {\n\t\tobservable[ propertyName ] = propertyValue;\n\t} else {\n\t\tobservable.set( propertyName, propertyValue );\n\t}\n}\n\n// Starts listening to changes in {@link BindChain._to} observables to update\n// {@link BindChain._observable} {@link BindChain._bindProperties}. Also sets the\n// initial state of {@link BindChain._observable}.\n//\n// @private\n// @param {BindChain} chain The chain initialized by {@link Observable#bind}.\nfunction attachBindToListeners( observable, toBindings ) {\n\ttoBindings.forEach( to => {\n\t\tconst boundObservables = observable[ boundObservablesSymbol ];\n\t\tlet bindings;\n\n\t\t// If there's already a chain between the observables (`observable` listens to\n\t\t// `to.observable`), there's no need to create another `change` event listener.\n\t\tif ( !boundObservables.get( to.observable ) ) {\n\t\t\tobservable.listenTo( to.observable, 'change', ( evt, propertyName ) => {\n\t\t\t\tbindings = boundObservables.get( to.observable )[ propertyName ];\n\n\t\t\t\t// Note: to.observable will fire for any property change, react\n\t\t\t\t// to changes of properties which are bound only.\n\t\t\t\tif ( bindings ) {\n\t\t\t\t\tbindings.forEach( binding => {\n\t\t\t\t\t\tupdateBoundObservableProperty( observable, binding.property );\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t} );\n}\n\n/**\n * Interface which adds \"observable properties\" and data binding functionality.\n *\n * Can be easily implemented by a class by mixing the {@link module:utils/observablemixin~ObservableMixin} mixin.\n *\n * Read more about the usage of this interface in the:\n * * {@glink framework/guides/architecture/core-editor-architecture#event-system-and-observables \"Event system and observables\"}\n * section of the {@glink framework/guides/architecture/core-editor-architecture \"Core editor architecture\"} guide,\n * * {@glink framework/guides/deep-dive/observables \"Observables\" deep dive} guide.\n *\n * @interface Observable\n * @extends module:utils/emittermixin~Emitter\n */\n\n/**\n * Fired when a property changed value.\n *\n *\t\tobservable.set( 'prop', 1 );\n *\n *\t\tobservable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `${ propertyName } has changed from ${ oldValue } to ${ newValue }` );\n *\t\t} );\n *\n *\t\tobservable.prop = 2; // -> 'prop has changed from 1 to 2'\n *\n * @event change:{property}\n * @param {String} name The property name.\n * @param {*} value The new property value.\n * @param {*} oldValue The previous property value.\n */\n\n/**\n * Fired when a property value is going to be set but is not set yet (before the `change` event is fired).\n *\n * You can control the final value of the property by using\n * the {@link module:utils/eventinfo~EventInfo#return event's `return` property}.\n *\n *\t\tobservable.set( 'prop', 1 );\n *\n *\t\tobservable.on( 'set:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `Value is going to be changed from ${ oldValue } to ${ newValue }` );\n *\t\t\tconsole.log( `Current property value is ${ observable[ propertyName ] }` );\n *\n *\t\t\t// Let's override the value.\n *\t\t\tevt.return = 3;\n *\t\t} );\n *\n *\t\tobservable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `Value has changed from ${ oldValue } to ${ newValue }` );\n *\t\t} );\n *\n *\t\tobservable.prop = 2; // -> 'Value is going to be changed from 1 to 2'\n *\t\t // -> 'Current property value is 1'\n *\t\t // -> 'Value has changed from 1 to 3'\n *\n * **Note:** Event is fired even when the new value is the same as the old value.\n *\n * @event set:{property}\n * @param {String} name The property name.\n * @param {*} value The new property value.\n * @param {*} oldValue The previous property value.\n */\n\n/**\n * Creates and sets the value of an observable property of this object. Such an property becomes a part\n * of the state and is be observable.\n *\n * It accepts also a single object literal containing key/value pairs with properties to be set.\n *\n * This method throws the `observable-set-cannot-override` error if the observable instance already\n * have a property with the given property name. This prevents from mistakenly overriding existing\n * properties and methods, but means that `foo.set( 'bar', 1 )` may be slightly slower than `foo.bar = 1`.\n *\n * @method #set\n * @param {String|Object} name The property's name or object with `name=>value` pairs.\n * @param {*} [value] The property's value (if `name` was passed in the first parameter).\n */\n\n/**\n * Binds {@link #set observable properties} to other objects implementing the\n * {@link module:utils/observablemixin~Observable} interface.\n *\n * Read more in the {@glink framework/guides/deep-dive/observables#property-bindings dedicated guide}\n * covering the topic of property bindings with some additional examples.\n *\n * Consider two objects: a `button` and an associated `command` (both `Observable`).\n *\n * A simple property binding could be as follows:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isEnabled' );\n *\n * or even shorter:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command );\n *\n * which works in the following way:\n *\n * * `button.isEnabled` **instantly equals** `command.isEnabled`,\n * * whenever `command.isEnabled` changes, `button.isEnabled` will immediately reflect its value.\n *\n * **Note**: To release the binding, use {@link module:utils/observablemixin~Observable#unbind}.\n *\n * You can also \"rename\" the property in the binding by specifying the new name in the `to()` chain:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isWorking' );\n *\n * It is possible to bind more than one property at a time to shorten the code:\n *\n *\t\tbutton.bind( 'isEnabled', 'value' ).to( command );\n *\n * which corresponds to:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command );\n *\t\tbutton.bind( 'value' ).to( command );\n *\n * The binding can include more than one observable, combining multiple data sources in a custom callback:\n *\n *\t\tbutton.bind( 'isEnabled' ).to( command, 'isEnabled', ui, 'isVisible',\n *\t\t\t( isCommandEnabled, isUIVisible ) => isCommandEnabled && isUIVisible );\n *\n * It is also possible to bind to the same property in an array of observables.\n * To bind a `button` to multiple commands (also `Observables`) so that each and every one of them\n * must be enabled for the button to become enabled, use the following code:\n *\n *\t\tbutton.bind( 'isEnabled' ).toMany( [ commandA, commandB, commandC ], 'isEnabled',\n *\t\t\t( isAEnabled, isBEnabled, isCEnabled ) => isAEnabled && isBEnabled && isCEnabled );\n *\n * @method #bind\n * @param {...String} bindProperties Observable properties that will be bound to other observable(s).\n * @returns {Object} The bind chain with the `to()` and `toMany()` methods.\n */\n\n/**\n * Removes the binding created with {@link #bind}.\n *\n *\t\t// Removes the binding for the 'a' property.\n *\t\tA.unbind( 'a' );\n *\n *\t\t// Removes bindings for all properties.\n *\t\tA.unbind();\n *\n * @method #unbind\n * @param {...String} [unbindProperties] Observable properties to be unbound. All the bindings will\n * be released if no properties are provided.\n */\n\n/**\n * Turns the given methods of this object into event-based ones. This means that the new method will fire an event\n * (named after the method) and the original action will be plugged as a listener to that event.\n *\n * Read more in the {@glink framework/guides/deep-dive/observables#decorating-object-methods dedicated guide}\n * covering the topic of decorating methods with some additional examples.\n *\n * Decorating the method does not change its behavior (it only adds an event),\n * but it allows to modify it later on by listening to the method's event.\n *\n * For example, to cancel the method execution the event can be {@link module:utils/eventinfo~EventInfo#stop stopped}:\n *\n *\t\tclass Foo {\n *\t\t\tconstructor() {\n *\t\t\t\tthis.decorate( 'method' );\n *\t\t\t}\n *\n *\t\t\tmethod() {\n *\t\t\t\tconsole.log( 'called!' );\n *\t\t\t}\n *\t\t}\n *\n *\t\tconst foo = new Foo();\n *\t\tfoo.on( 'method', ( evt ) => {\n *\t\t\tevt.stop();\n *\t\t}, { priority: 'high' } );\n *\n *\t\tfoo.method(); // Nothing is logged.\n *\n *\n * **Note**: The high {@link module:utils/priorities~PriorityString priority} listener\n * has been used to execute this particular callback before the one which calls the original method\n * (which uses the \"normal\" priority).\n *\n * It is also possible to change the returned value:\n *\n *\t\tfoo.on( 'method', ( evt ) => {\n *\t\t\tevt.return = 'Foo!';\n *\t\t} );\n *\n *\t\tfoo.method(); // -> 'Foo'\n *\n * Finally, it is possible to access and modify the arguments the method is called with:\n *\n *\t\tmethod( a, b ) {\n *\t\t\tconsole.log( `${ a }, ${ b }` );\n *\t\t}\n *\n *\t\t// ...\n *\n *\t\tfoo.on( 'method', ( evt, args ) => {\n *\t\t\targs[ 0 ] = 3;\n *\n *\t\t\tconsole.log( args[ 1 ] ); // -> 2\n *\t\t}, { priority: 'high' } );\n *\n *\t\tfoo.method( 1, 2 ); // -> '3, 2'\n *\n * @method #decorate\n * @param {String} methodName Name of the method to decorate.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/editableelement\n */\n\nimport ContainerElement from './containerelement';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\n\nconst documentSymbol = Symbol( 'document' );\n\n/**\n * Editable element which can be a {@link module:engine/view/rooteditableelement~RootEditableElement root}\n * or nested editable area in the editor.\n *\n * Editable is automatically read-only when its {@link module:engine/view/document~Document Document} is read-only.\n *\n * The constructor of this class shouldn't be used directly. To create new `EditableElement` use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createEditableElement `downcastWriter#createEditableElement()`} method.\n *\n * @extends module:engine/view/containerelement~ContainerElement\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class EditableElement extends ContainerElement {\n\t/**\n\t * Creates an editable element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createEditableElement\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Whether the editable is in read-write or read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/editableelement~EditableElement#isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * Whether the editable is focused.\n\t\t *\n\t\t * This property updates when {@link module:engine/view/document~Document#isFocused document.isFocused} or view\n\t\t * selection is changed.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/editableelement~EditableElement#isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The {@link module:engine/view/document~Document} which is an owner of this root.\n\t\t * Can only by set once.\n\t\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-editableelement-document-already-set`\n\t\t * when document is already set.\n\t\t *\n\t\t * @member {module:engine/view/document~Document} #document\n\t\t */\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\teditableElement.is( 'editableElement' ); // -> true\n\t *\t\teditableElement.is( 'element' ); // -> true\n\t *\t\teditableElement.is( 'node' ); // -> true\n\t *\t\teditableElement.is( 'view:editableElement' ); // -> true\n\t *\t\teditableElement.is( 'view:element' ); // -> true\n\t *\t\teditableElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\teditableElement.is( 'model:element' ); // -> false\n\t *\t\teditableElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an editbale element, you can also check its\n\t * {@link module:engine/view/editableelement~EditableElement#name name}:\n\t *\n\t *\t\teditableElement.is( 'div' ); // -> true if this is a div element\n\t *\t\teditableElement.is( 'editableElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'editableElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'editableElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Returns document associated with the editable.\n\t *\n\t * @readonly\n\t * @returns {module:engine/view/document~Document}\n\t */\n\tget document() {\n\t\treturn this.getCustomProperty( documentSymbol );\n\t}\n\n\t/**\n\t * Sets document of this editable element.\n\t *\n\t * @protected\n\t * @param {module:engine/view/document~Document} document\n\t */\n\tset _document( document ) {\n\t\tif ( this.getCustomProperty( documentSymbol ) ) {\n\t\t\t/**\n\t\t\t * View document is already set. It can only be set once.\n\t\t\t *\n\t\t\t * @error view-editableelement-document-already-set\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-editableelement-document-already-set: View document is already set.', this );\n\t\t}\n\n\t\tthis._setCustomProperty( documentSymbol, document );\n\n\t\tthis.bind( 'isReadOnly' ).to( document );\n\n\t\tthis.bind( 'isFocused' ).to(\n\t\t\tdocument,\n\t\t\t'isFocused',\n\t\t\tisFocused => isFocused && document.selection.editableElement == this\n\t\t);\n\n\t\t// Update focus state based on selection changes.\n\t\tthis.listenTo( document.selection, 'change', () => {\n\t\t\tthis.isFocused = document.isFocused && document.selection.editableElement == this;\n\t\t} );\n\t}\n}\n\nmix( EditableElement, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/rooteditableelement\n */\n\nimport EditableElement from './editableelement';\n\nconst rootNameSymbol = Symbol( 'rootName' );\n\n/**\n * Class representing a single root in the data view. A root can be either {@link ~RootEditableElement#isReadOnly editable or read-only},\n * but in both cases it is called \"an editable\". Roots can contain other {@link module:engine/view/editableelement~EditableElement\n * editable elements} making them \"nested editables\".\n *\n * @extends module:engine/view/editableelement~EditableElement\n */\nexport default class RootEditableElement extends EditableElement {\n\t/**\n\t * Creates root editable element.\n\t *\n\t * @param {String} name Node name.\n\t */\n\tconstructor( name ) {\n\t\tsuper( name );\n\n\t\t/**\n\t\t * Name of this root inside {@link module:engine/view/document~Document} that is an owner of this root. If no\n\t\t * other name is set, `main` name is used.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.rootName = 'main';\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trootEditableElement.is( 'rootEditableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'editableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'element' ); // -> true\n\t *\t\trootEditableElement.is( 'node' ); // -> true\n\t *\t\trootEditableElement.is( 'view:rootEditableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'view:editableElement' ); // -> true\n\t *\t\trootEditableElement.is( 'view:element' ); // -> true\n\t *\t\trootEditableElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\trootEditableElement.is( 'model:element' ); // -> false\n\t *\t\trootEditableElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is a root editbale element, you can also check its\n\t * {@link module:engine/view/rooteditableelement~RootEditableElement#name name}:\n\t *\n\t *\t\trootEditableElement.is( 'div' ); // -> true if this is a div root editable element\n\t *\t\trootEditableElement.is( 'rootEditableElement', 'div' ); // -> same as above\n\t *\t\ttext.is( 'div' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'rootElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'rootElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\tget rootName() {\n\t\treturn this.getCustomProperty( rootNameSymbol );\n\t}\n\n\tset rootName( rootName ) {\n\t\tthis._setCustomProperty( rootNameSymbol, rootName );\n\t}\n\n\t/**\n\t * Overrides old element name and sets new one.\n\t * This is needed because view roots are created before they are attached to the DOM.\n\t * The name of the root element is temporary at this stage. It has to be changed when the\n\t * view root element is attached to the DOM element.\n\t *\n\t * @protected\n\t * @param {String} name The new name of element.\n\t */\n\tset _name( name ) {\n\t\tthis.name = name;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/treewalker\n */\n\nimport Element from './element';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport Position from './position';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Position iterator class. It allows to iterate forward and backward over the document.\n */\nexport default class TreeWalker {\n\t/**\n\t * Creates a range iterator. All parameters are optional, but you have to specify either `boundaries` or `startPosition`.\n\t *\n\t * @constructor\n\t * @param {Object} options Object with configuration.\n\t * @param {module:engine/view/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {module:engine/view/position~Position} [options.startPosition] Starting position.\n\t * @param {'forward'|'backward'} [options.direction='forward'] Walking direction.\n\t * @param {Boolean} [options.singleCharacters=false] Flag indicating whether all characters from\n\t * {@link module:engine/view/text~Text} should be returned as one {@link module:engine/view/text~Text} (`false`) ore one by one as\n\t * {@link module:engine/view/textproxy~TextProxy} (`true`).\n\t * @param {Boolean} [options.shallow=false] Flag indicating whether iterator should enter elements or not. If the\n\t * iterator is shallow child nodes of any iterated node will not be returned along with `elementEnd` tag.\n\t * @param {Boolean} [options.ignoreElementEnd=false] Flag indicating whether iterator should ignore `elementEnd`\n\t * tags. If the option is true walker will not return a parent node of start position. If this option is `true`\n\t * each {@link module:engine/view/element~Element} will be returned once, while if the option is `false` they might be returned\n\t * twice: for `'elementStart'` and `'elementEnd'`.\n\t */\n\tconstructor( options = {} ) {\n\t\tif ( !options.boundaries && !options.startPosition ) {\n\t\t\t/**\n\t\t\t * Neither boundaries nor starting position have been defined.\n\t\t\t *\n\t\t\t * @error view-tree-walker-no-start-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.',\n\t\t\t\tnull\n\t\t\t);\n\t\t}\n\n\t\tif ( options.direction && options.direction != 'forward' && options.direction != 'backward' ) {\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.',\n\t\t\t\toptions.startPosition,\n\t\t\t\t{ direction: options.direction }\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Iterator boundaries.\n\t\t *\n\t\t * When the iterator is walking `'forward'` on the end of boundary or is walking `'backward'`\n\t\t * on the start of boundary, then `{ done: true }` is returned.\n\t\t *\n\t\t * If boundaries are not defined they are set before first and after last child of the root node.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/range~Range} module:engine/view/treewalker~TreeWalker#boundaries\n\t\t */\n\t\tthis.boundaries = options.boundaries || null;\n\n\t\t/**\n\t\t * Iterator position. If start position is not defined then position depends on {@link #direction}. If direction is\n\t\t * `'forward'` position starts form the beginning, when direction is `'backward'` position starts from the end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position} module:engine/view/treewalker~TreeWalker#position\n\t\t */\n\t\tif ( options.startPosition ) {\n\t\t\tthis.position = Position._createAt( options.startPosition );\n\t\t} else {\n\t\t\tthis.position = Position._createAt( options.boundaries[ options.direction == 'backward' ? 'end' : 'start' ] );\n\t\t}\n\n\t\t/**\n\t\t * Walking direction. Defaults `'forward'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'backward'|'forward'} module:engine/view/treewalker~TreeWalker#direction\n\t\t */\n\t\tthis.direction = options.direction || 'forward';\n\n\t\t/**\n\t\t * Flag indicating whether all characters from {@link module:engine/view/text~Text} should be returned as one\n\t\t * {@link module:engine/view/text~Text} or one by one as {@link module:engine/view/textproxy~TextProxy}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#singleCharacters\n\t\t */\n\t\tthis.singleCharacters = !!options.singleCharacters;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should enter elements or not. If the iterator is shallow child nodes of any\n\t\t * iterated node will not be returned along with `elementEnd` tag.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#shallow\n\t\t */\n\t\tthis.shallow = !!options.shallow;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should ignore `elementEnd` tags. If set to `true`, walker will not\n\t\t * return a parent node of the start position. Each {@link module:engine/view/element~Element} will be returned once.\n\t\t * When set to `false` each element might be returned twice: for `'elementStart'` and `'elementEnd'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/view/treewalker~TreeWalker#ignoreElementEnd\n\t\t */\n\t\tthis.ignoreElementEnd = !!options.ignoreElementEnd;\n\n\t\t/**\n\t\t * Start boundary parent.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/node~Node} module:engine/view/treewalker~TreeWalker#_boundaryStartParent\n\t\t */\n\t\tthis._boundaryStartParent = this.boundaries ? this.boundaries.start.parent : null;\n\n\t\t/**\n\t\t * End boundary parent.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/node~Node} module:engine/view/treewalker~TreeWalker#_boundaryEndParent\n\t\t */\n\t\tthis._boundaryEndParent = this.boundaries ? this.boundaries.end.parent : null;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:engine/view/treewalker~TreeWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves {@link #position} in the {@link #direction} skipping values as long as the callback function returns `true`.\n\t *\n\t * For example:\n\t *\n\t * \t\twalker.skip( value => value.type == 'text' ); // <p>{}foo</p> -> <p>foo[]</p>\n\t * \t\twalker.skip( value => true ); // Move the position to the end: <p>{}foo</p> -> <p>foo</p>[]\n\t * \t\twalker.skip( value => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/view/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t */\n\tskip( skip ) {\n\t\tlet done, value, prevPosition;\n\n\t\tdo {\n\t\t\tprevPosition = this.position;\n\n\t\t\t( { done, value } = this.next() );\n\t\t} while ( !done && skip( value ) );\n\n\t\tif ( !done ) {\n\t\t\tthis.position = prevPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the next tree walker's value.\n\t *\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} Object implementing iterator interface, returning\n\t * information about taken step.\n\t */\n\tnext() {\n\t\tif ( this.direction == 'forward' ) {\n\t\t\treturn this._next();\n\t\t} else {\n\t\t\treturn this._previous();\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step forward in view. Moves the {@link #position} to the next position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done `true` if iterator is done, `false` otherwise.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_next() {\n\t\tlet position = this.position.clone();\n\t\tconst previousPosition = this.position;\n\t\tconst parent = position.parent;\n\n\t\t// We are at the end of the root.\n\t\tif ( parent.parent === null && position.offset === parent.childCount ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent === this._boundaryEndParent && position.offset == this.boundaries.end.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just after current position.\n\t\tlet node;\n\n\t\t// Text is a specific parent because it contains string instead of child nodes.\n\t\tif ( parent instanceof Text ) {\n\t\t\tif ( position.isAtEnd ) {\n\t\t\t\t// Prevent returning \"elementEnd\" for Text node. Skip that value and return the next walker step.\n\t\t\t\tthis.position = Position._createAfter( parent );\n\n\t\t\t\treturn this._next();\n\t\t\t}\n\n\t\t\tnode = parent.data[ position.offset ];\n\t\t} else {\n\t\t\tnode = parent.getChild( position.offset );\n\t\t}\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition = new Position( node, 0 );\n\t\t\t} else {\n\t\t\t\tposition.offset++;\n\t\t\t}\n\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t} else if ( node instanceof Text ) {\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tposition = new Position( node, 0 );\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\tlet charactersCount = node.data.length;\n\t\t\t\tlet item;\n\n\t\t\t\t// If text stick out of walker range, we need to cut it and wrap in TextProxy.\n\t\t\t\tif ( node == this._boundaryEndParent ) {\n\t\t\t\t\tcharactersCount = this.boundaries.end.offset;\n\t\t\t\t\titem = new TextProxy( node, 0, charactersCount );\n\t\t\t\t\tposition = Position._createAfter( item );\n\t\t\t\t} else {\n\t\t\t\t\titem = new TextProxy( node, 0, node.data.length );\n\t\t\t\t\t// If not just keep moving forward.\n\t\t\t\t\tposition.offset++;\n\t\t\t\t}\n\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t\t}\n\t\t} else if ( typeof node == 'string' ) {\n\t\t\tlet textLength;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\ttextLength = 1;\n\t\t\t} else {\n\t\t\t\t// Check if text stick out of walker range.\n\t\t\t\tconst endOffset = parent === this._boundaryEndParent ? this.boundaries.end.offset : parent.data.length;\n\n\t\t\t\ttextLength = endOffset - position.offset;\n\t\t\t}\n\n\t\t\tconst textProxy = new TextProxy( parent, position.offset, textLength );\n\n\t\t\tposition.offset += textLength;\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'text', textProxy, previousPosition, position, textLength );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the end of current `parent`.\n\t\t\tposition = Position._createAfter( parent );\n\t\t\tthis.position = position;\n\n\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\treturn this._formatReturnValue( 'elementEnd', parent, previousPosition, position );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step backward in view. Moves the {@link #position} to the previous position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_previous() {\n\t\tlet position = this.position.clone();\n\t\tconst previousPosition = this.position;\n\t\tconst parent = position.parent;\n\n\t\t// We are at the beginning of the root.\n\t\tif ( parent.parent === null && position.offset === 0 ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent == this._boundaryStartParent && position.offset == this.boundaries.start.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just before current position.\n\t\tlet node;\n\n\t\t// Text {@link module:engine/view/text~Text} element is a specific parent because contains string instead of child nodes.\n\t\tif ( parent instanceof Text ) {\n\t\t\tif ( position.isAtStart ) {\n\t\t\t\t// Prevent returning \"elementStart\" for Text node. Skip that value and return the next walker step.\n\t\t\t\tthis.position = Position._createBefore( parent );\n\n\t\t\t\treturn this._previous();\n\t\t\t}\n\n\t\t\tnode = parent.data[ position.offset - 1 ];\n\t\t} else {\n\t\t\tnode = parent.getChild( position.offset - 1 );\n\t\t}\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition = new Position( node, node.childCount );\n\t\t\t\tthis.position = position;\n\n\t\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\t\treturn this._previous();\n\t\t\t\t} else {\n\t\t\t\t\treturn this._formatReturnValue( 'elementEnd', node, previousPosition, position );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tposition.offset--;\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t\t}\n\t\t} else if ( node instanceof Text ) {\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tposition = new Position( node, node.data.length );\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._previous();\n\t\t\t} else {\n\t\t\t\tlet charactersCount = node.data.length;\n\t\t\t\tlet item;\n\n\t\t\t\t// If text stick out of walker range, we need to cut it and wrap in TextProxy.\n\t\t\t\tif ( node == this._boundaryStartParent ) {\n\t\t\t\t\tconst offset = this.boundaries.start.offset;\n\n\t\t\t\t\titem = new TextProxy( node, offset, node.data.length - offset );\n\t\t\t\t\tcharactersCount = item.data.length;\n\t\t\t\t\tposition = Position._createBefore( item );\n\t\t\t\t} else {\n\t\t\t\t\titem = new TextProxy( node, 0, node.data.length );\n\t\t\t\t\t// If not just keep moving backward.\n\t\t\t\t\tposition.offset--;\n\t\t\t\t}\n\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn this._formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t\t}\n\t\t} else if ( typeof node == 'string' ) {\n\t\t\tlet textLength;\n\n\t\t\tif ( !this.singleCharacters ) {\n\t\t\t\t// Check if text stick out of walker range.\n\t\t\t\tconst startOffset = parent === this._boundaryStartParent ? this.boundaries.start.offset : 0;\n\n\t\t\t\ttextLength = position.offset - startOffset;\n\t\t\t} else {\n\t\t\t\ttextLength = 1;\n\t\t\t}\n\n\t\t\tposition.offset -= textLength;\n\n\t\t\tconst textProxy = new TextProxy( parent, position.offset, textLength );\n\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'text', textProxy, previousPosition, position, textLength );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the beginning of current `parent`.\n\t\t\tposition = Position._createBefore( parent );\n\t\t\tthis.position = position;\n\n\t\t\treturn this._formatReturnValue( 'elementStart', parent, previousPosition, position, 1 );\n\t\t}\n\t}\n\n\t/**\n\t * Format returned data and adjust `previousPosition` and `nextPosition` if reach the bound of the {@link module:engine/view/text~Text}.\n\t *\n\t * @private\n\t * @param {module:engine/view/treewalker~TreeWalkerValueType} type Type of step.\n\t * @param {module:engine/view/item~Item} item Item between old and new position.\n\t * @param {module:engine/view/position~Position} previousPosition Previous position of iterator.\n\t * @param {module:engine/view/position~Position} nextPosition Next position of iterator.\n\t * @param {Number} [length] Length of the item.\n\t * @returns {module:engine/view/treewalker~TreeWalkerValue}\n\t */\n\t_formatReturnValue( type, item, previousPosition, nextPosition, length ) {\n\t\t// Text is a specific parent, because contains string instead of children.\n\t\t// Walker doesn't enter to the Text except situations when walker is iterating over every single character,\n\t\t// or the bound starts/ends inside the Text. So when the position is at the beginning or at the end of the Text\n\t\t// we move it just before or just after Text.\n\t\tif ( item instanceof TextProxy ) {\n\t\t\t// Position is at the end of Text.\n\t\t\tif ( item.offsetInText + item.data.length == item.textNode.data.length ) {\n\t\t\t\tif ( this.direction == 'forward' && !( this.boundaries && this.boundaries.end.isEqual( this.position ) ) ) {\n\t\t\t\t\tnextPosition = Position._createAfter( item.textNode );\n\t\t\t\t\t// When we change nextPosition of returned value we need also update walker current position.\n\t\t\t\t\tthis.position = nextPosition;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousPosition = Position._createAfter( item.textNode );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Position is at the begining ot the text.\n\t\t\tif ( item.offsetInText === 0 ) {\n\t\t\t\tif ( this.direction == 'backward' && !( this.boundaries && this.boundaries.start.isEqual( this.position ) ) ) {\n\t\t\t\t\tnextPosition = Position._createBefore( item.textNode );\n\t\t\t\t\t// When we change nextPosition of returned value we need also update walker current position.\n\t\t\t\t\tthis.position = nextPosition;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousPosition = Position._createBefore( item.textNode );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn {\n\t\t\tdone: false,\n\t\t\tvalue: {\n\t\t\t\ttype,\n\t\t\t\titem,\n\t\t\t\tpreviousPosition,\n\t\t\t\tnextPosition,\n\t\t\t\tlength\n\t\t\t}\n\t\t};\n\t}\n}\n\n/**\n * Type of the step made by {@link module:engine/view/treewalker~TreeWalker}.\n * Possible values: `'elementStart'` if walker is at the beginning of a node, `'elementEnd'` if walker is at the end\n * of node, or `'text'` if walker traversed over single and multiple characters.\n * For {@link module:engine/view/text~Text} `elementStart` and `elementEnd` is not returned.\n *\n * @typedef {String} module:engine/view/treewalker~TreeWalkerValueType\n */\n\n/**\n * Object returned by {@link module:engine/view/treewalker~TreeWalker} when traversing tree view.\n *\n * @typedef {Object} module:engine/view/treewalker~TreeWalkerValue\n * @property {module:engine/view/treewalker~TreeWalkerValueType} type\n * @property {module:engine/view/item~Item} item Item between the old and the new positions\n * of the tree walker.\n * @property {module:engine/view/position~Position} previousPosition Previous position of the iterator.\n * * Forward iteration: For `'elementEnd'` it is the last position inside the element. For all other types it is the\n * position before the item.\n * * Backward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after item.\n * * If the position is at the beginning or at the end of the {@link module:engine/view/text~Text} it is always moved from the\n * inside of the text to its parent just before or just after that text.\n * @property {module:engine/view/position~Position} nextPosition Next position of the iterator.\n * * Forward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after the item.\n * * Backward iteration: For `'elementEnd'` it is last position inside element. For all other types it is the position\n * before the item.\n * * If the position is at the beginning or at the end of the {@link module:engine/view/text~Text} it is always moved from the\n * inside of the text to its parent just before or just after that text.\n * @property {Number} [length] Length of the item. For `'elementStart'` it is `1`. For `'text'` it is\n * the length of that text. For `'elementEnd'` it is `undefined`.\n */\n\n/**\n * Tree walking directions.\n *\n * @typedef {'forward'|'backward'} module:engine/view/treewalker~TreeWalkerDirection\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/position\n */\n\nimport TreeWalker from './treewalker';\n\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EditableElement from './editableelement';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Position in the view tree. Position is represented by its parent node and an offset in this parent.\n *\n * In order to create a new position instance use the `createPosition*()` factory methods available in:\n *\n * * {@link module:engine/view/view~View}\n * * {@link module:engine/view/downcastwriter~DowncastWriter}\n * * {@link module:engine/view/upcastwriter~UpcastWriter}\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} parent Position parent.\n\t * @param {Number} offset Position offset.\n\t */\n\tconstructor( parent, offset ) {\n\t\t/**\n\t\t * Position parent.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t\t * module:engine/view/position~Position#parent\n\t\t */\n\t\tthis.parent = parent;\n\n\t\t/**\n\t\t * Position offset.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} module:engine/view/position~Position#offset\n\t\t */\n\t\tthis.offset = offset;\n\t}\n\n\t/**\n\t * Node directly after the position. Equals `null` when there is no node after position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset ) || null;\n\t}\n\n\t/**\n\t * Node directly before the position. Equals `null` when there is no node before position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeBefore() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset - 1 ) || null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\tconst endOffset = this.parent.is( 'text' ) ? this.parent.data.length : this.parent.childCount;\n\n\t\treturn this.offset === endOffset;\n\t}\n\n\t/**\n\t * Position's root, that is the root of the position's parent element.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.parent.root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this position, or `null` if\n\t * position is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\tlet editable = this.parent;\n\n\t\twhile ( !( editable instanceof EditableElement ) ) {\n\t\t\tif ( editable.parent ) {\n\t\t\t\teditable = editable.parent;\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t}\n\n\t\treturn editable;\n\t}\n\n\t/**\n\t * Returns a new instance of Position with offset incremented by `shift` value.\n\t *\n\t * @param {Number} shift How position offset should get changed. Accepts negative values.\n\t * @returns {module:engine/view/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = Position._createAt( this );\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/view/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' ); // <p>{}foo</p> -> <p>foo[]</p>\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } ); // <p>foo[]</p> -> <p>{}foo</p>\n\t * \t\tgetLastMatchingPosition( value => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/view/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/view/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and it's ancestors.\n\t *\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/node~Node} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions.\n\t *\n\t * @param {module:engine/view/position~Position} position\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tposition.is( 'position' ); // -> true\n\t *\t\tposition.is( 'view:position' ); // -> true\n\t *\n\t *\t\tposition.is( 'model:position' ); // -> false\n\t *\t\tposition.is( 'element' ); // -> false\n\t *\t\tposition.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'position' || type == 'view:position';\n\t}\n\n\t/**\n\t * Checks whether this position equals given position.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn ( this.parent == otherPosition.parent && this.offset == otherPosition.offset );\n\t}\n\n\t/**\n\t * Checks whether this position is located before given position. When method returns `false` it does not mean that\n\t * this position is after give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isAfter\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is located after given position. When method returns `false` it does not mean that\n\t * this position is before give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isBefore\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before, after or in same position that other position. Two positions may be also\n\t * different when they are located in separate roots.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/view/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.root !== otherPosition.root ) {\n\t\t\treturn 'different';\n\t\t}\n\n\t\tif ( this.isEqual( otherPosition ) ) {\n\t\t\treturn 'same';\n\t\t}\n\n\t\t// Get path from root to position's parent element.\n\t\tconst thisPath = this.parent.is( 'node' ) ? this.parent.getPath() : [];\n\t\tconst otherPath = otherPosition.parent.is( 'node' ) ? otherPosition.parent.getPath() : [];\n\n\t\t// Add the positions' offsets to the parents offsets.\n\t\tthisPath.push( this.offset );\n\t\totherPath.push( otherPosition.offset );\n\n\t\t// Compare both path arrays to find common ancestor.\n\t\tconst result = compareArrays( thisPath, otherPath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn 'before';\n\n\t\t\tcase 'extension':\n\t\t\t\treturn 'after';\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < otherPath[ result ] ? 'before' : 'after';\n\t\t}\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/view/treewalker~TreeWalker TreeWalker} instance with this positions as a start position.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}\n\t * @param {module:engine/view/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\tclone() {\n\t\treturn new Position( this.parent, this.offset );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link module:engine/view/position~Position._createBefore},\n\t * * {@link module:engine/view/position~Position._createAfter}.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tstatic _createAt( itemOrPosition, offset ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn new this( itemOrPosition.parent, itemOrPosition.offset );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.is( 'text' ) ? node.data.length : node.childCount;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this._createBefore( node );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this._createAfter( node );\n\t\t\t} else if ( offset !== 0 && !offset ) {\n\t\t\t\t/**\n\t\t\t\t * {@link module:engine/view/view~View#createPositionAt `View#createPositionAt()`}\n\t\t\t\t * requires the offset to be specified when the first parameter is a view item.\n\t\t\t\t *\n\t\t\t\t * @error view-createPositionAt-offset-required\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-createPositionAt-offset-required: ' +\n\t\t\t\t\t'View#createPositionAt() requires the offset when the first parameter is a view item.',\n\t\t\t\t\tnode\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn new Position( node, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic _createAfter( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText + item.data.length );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root.\n\t\t\t *\n\t\t\t * @error view-position-after-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-after-root: You can not make position after root.', item, { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index + 1 );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic _createBefore( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You cannot make a position before a root.\n\t\t\t *\n\t\t\t * @error view-position-before-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-before-root: You can not make position before root.', item, { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index );\n\t}\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/view/position~PositionRelation\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/range\n */\n\nimport Position from './position';\nimport TreeWalker from './treewalker';\n\n/**\n * Range in the view tree. A range is represented by its start and end {@link module:engine/view/position~Position positions}.\n *\n * In order to create a new position instance use the `createPosition*()` factory methods available in:\n *\n * * {@link module:engine/view/view~View}\n * * {@link module:engine/view/downcastwriter~DowncastWriter}\n * * {@link module:engine/view/upcastwriter~UpcastWriter}\n */\nexport default class Range {\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** Constructor creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at the `start` position.\n\t */\n\tconstructor( start, end = null ) {\n\t\t/**\n\t\t * Start position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position}\n\t\t */\n\t\tthis.start = start.clone();\n\n\t\t/**\n\t\t * End position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/position~Position}\n\t\t */\n\t\tthis.end = end ? end.clone() : start.clone();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link module:engine/view/item~Item view items} that are in this range and returns\n\t * them together with additional information like length or {@link module:engine/view/position~Position positions},\n\t * grouped as {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * This iterator uses {@link module:engine/view/treewalker~TreeWalker TreeWalker} with `boundaries` set to this range and\n\t * `ignoreElementEnd` option\n\t * set to `true`.\n\t *\n\t * @returns {Iterable.<module:engine/view/treewalker~TreeWalkerValue>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tyield* new TreeWalker( { boundaries: this, ignoreElementEnd: true } );\n\t}\n\n\t/**\n\t * Returns whether the range is collapsed, that is it start and end positions are equal.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.start.isEqual( this.end );\n\t}\n\n\t/**\n\t * Returns whether this range is flat, that is if {@link module:engine/view/range~Range#start start} position and\n\t * {@link module:engine/view/range~Range#end end} position are in the same {@link module:engine/view/position~Position#parent parent}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isFlat() {\n\t\treturn this.start.parent === this.end.parent;\n\t}\n\n\t/**\n\t * Range root element.\n\t *\n\t * @type {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.start.root;\n\t}\n\n\t/**\n\t * Creates a maximal range that has the same content as this range but is expanded in both ways (at the beginning\n\t * and at the end).\n\t *\n\t * For example:\n\t *\n\t *\t\t<p>Foo</p><p><b>{Bar}</b></p> -> <p>Foo</p>[<p><b>Bar</b>]</p>\n\t *\t\t<p><b>foo</b>{bar}<span></span></p> -> <p><b>foo[</b>bar<span></span>]</p>\n\t *\n\t * Note that in the sample above:\n\t *\n\t * - `<p>` have type of {@link module:engine/view/containerelement~ContainerElement},\n\t * - `<b>` have type of {@link module:engine/view/attributeelement~AttributeElement},\n\t * - `<span>` have type of {@link module:engine/view/uielement~UIElement}.\n\t *\n\t * @returns {module:engine/view/range~Range} Enlarged range.\n\t */\n\tgetEnlarged() {\n\t\tlet start = this.start.getLastMatchingPosition( enlargeTrimSkip, { direction: 'backward' } );\n\t\tlet end = this.end.getLastMatchingPosition( enlargeTrimSkip );\n\n\t\t// Fix positions, in case if they are in Text node.\n\t\tif ( start.parent.is( 'text' ) && start.isAtStart ) {\n\t\t\tstart = Position._createBefore( start.parent );\n\t\t}\n\n\t\tif ( end.parent.is( 'text' ) && end.isAtEnd ) {\n\t\t\tend = Position._createAfter( end.parent );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a minimum range that has the same content as this range but is trimmed in both ways (at the beginning\n\t * and at the end).\n\t *\n\t * For example:\n\t *\n\t *\t\t<p>Foo</p>[<p><b>Bar</b>]</p> -> <p>Foo</p><p><b>{Bar}</b></p>\n\t *\t\t<p><b>foo[</b>bar<span></span>]</p> -> <p><b>foo</b>{bar}<span></span></p>\n\t *\n\t * Note that in the sample above:\n\t *\n\t * - `<p>` have type of {@link module:engine/view/containerelement~ContainerElement},\n\t * - `<b>` have type of {@link module:engine/view/attributeelement~AttributeElement},\n\t * - `<span>` have type of {@link module:engine/view/uielement~UIElement}.\n\t *\n\t * @returns {module:engine/view/range~Range} Shrink range.\n\t */\n\tgetTrimmed() {\n\t\tlet start = this.start.getLastMatchingPosition( enlargeTrimSkip );\n\n\t\tif ( start.isAfter( this.end ) || start.isEqual( this.end ) ) {\n\t\t\treturn new Range( start, start );\n\t\t}\n\n\t\tlet end = this.end.getLastMatchingPosition( enlargeTrimSkip, { direction: 'backward' } );\n\t\tconst nodeAfterStart = start.nodeAfter;\n\t\tconst nodeBeforeEnd = end.nodeBefore;\n\n\t\t// Because TreeWalker prefers positions next to text node, we need to move them manually into these text nodes.\n\t\tif ( nodeAfterStart && nodeAfterStart.is( 'text' ) ) {\n\t\t\tstart = new Position( nodeAfterStart, 0 );\n\t\t}\n\n\t\tif ( nodeBeforeEnd && nodeBeforeEnd.is( 'text' ) ) {\n\t\t\tend = new Position( nodeBeforeEnd, nodeBeforeEnd.data.length );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Two ranges are equal if their start and end positions are equal.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges are equal, `false` otherwise\n\t */\n\tisEqual( otherRange ) {\n\t\treturn this == otherRange || ( this.start.isEqual( otherRange.start ) && this.end.isEqual( otherRange.end ) );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/view/position~Position position}.\n\t *\n\t * @param {module:engine/view/position~Position} position Position to check.\n\t * @returns {Boolean} `true` if given {@link module:engine/view/position~Position position} is contained in this range,\n\t * `false` otherwise.\n\t */\n\tcontainsPosition( position ) {\n\t\treturn position.isAfter( this.start ) && position.isBefore( this.end );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/view/range~Range range}.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to check.\n\t * @param {Boolean} [loose=false] Whether the check is loose or strict. If the check is strict (`false`), compared range cannot\n\t * start or end at the same position as this range boundaries. If the check is loose (`true`), compared range can start, end or\n\t * even be equal to this range. Note that collapsed ranges are always compared in strict mode.\n\t * @returns {Boolean} `true` if given {@link module:engine/view/range~Range range} boundaries are contained by this range, `false`\n\t * otherwise.\n\t */\n\tcontainsRange( otherRange, loose = false ) {\n\t\tif ( otherRange.isCollapsed ) {\n\t\t\tloose = false;\n\t\t}\n\n\t\tconst containsStart = this.containsPosition( otherRange.start ) || ( loose && this.start.isEqual( otherRange.start ) );\n\t\tconst containsEnd = this.containsPosition( otherRange.end ) || ( loose && this.end.isEqual( otherRange.end ) );\n\n\t\treturn containsStart && containsEnd;\n\t}\n\n\t/**\n\t * Computes which part(s) of this {@link module:engine/view/range~Range range} is not a part of given\n\t * {@link module:engine/view/range~Range range}.\n\t * Returned array contains zero, one or two {@link module:engine/view/range~Range ranges}.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet foo = downcastWriter.createText( 'foo' );\n\t *\t\tlet img = downcastWriter.createContainerElement( 'img' );\n\t *\t\tlet bar = downcastWriter.createText( 'bar' );\n\t *\t\tlet p = downcastWriter.createContainerElement( 'p', null, [ foo, img, bar ] );\n\t *\n\t *\t\tlet range = view.createRange( view.createPositionAt( foo, 2 ), view.createPositionAt( bar, 1 ); // \"o\", img, \"b\" are in range.\n\t *\t\tlet otherRange = view.createRange( // \"oo\", img, \"ba\" are in range.\n\t *\t\t\tview.createPositionAt( foo, 1 ),\n\t *\t\t\tview.createPositionAt( bar, 2 )\n\t *\t\t);\n\t *\t\tlet transformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has no ranges because `otherRange` contains `range`\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( foo, 1 ), view.createPositionAt( p, 2 ); // \"oo\", img are in range.\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has one range: from ( p, 2 ) to ( bar, 1 )\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( p, 1 ), view.createPositionAt( p, 2 ) ); // img is in range.\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has two ranges: from ( foo, 1 ) to ( p, 1 ) and from ( p, 2 ) to ( bar, 1 )\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to differentiate against.\n\t * @returns {Array.<module:engine/view/range~Range>} The difference between ranges.\n\t */\n\tgetDifference( otherRange ) {\n\t\tconst ranges = [];\n\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect.\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the start to the middle of this range.\n\t\t\t\tranges.push( new Range( this.start, otherRange.start ) );\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the middle of this range to the end.\n\t\t\t\tranges.push( new Range( otherRange.end, this.end ) );\n\t\t\t}\n\t\t} else {\n\t\t\t// Ranges do not intersect, return the original range.\n\t\t\tranges.push( this.clone() );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an intersection of this {@link module:engine/view/range~Range range} and given {@link module:engine/view/range~Range range}.\n\t * Intersection is a common part of both of those ranges. If ranges has no common part, returns `null`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet foo = downcastWriter.createText( 'foo' );\n\t *\t\tlet img = downcastWriter.createContainerElement( 'img' );\n\t *\t\tlet bar = downcastWriter.createText( 'bar' );\n\t *\t\tlet p = downcastWriter.createContainerElement( 'p', null, [ foo, img, bar ] );\n\t *\n\t *\t\tlet range = view.createRange( view.createPositionAt( foo, 2 ), view.createPositionAt( bar, 1 ); // \"o\", img, \"b\" are in range.\n\t *\t\tlet otherRange = view.createRange( view.createPositionAt( foo, 1 ), view.createPositionAt( p, 2 ); // \"oo\", img are in range.\n\t *\t\tlet transformed = range.getIntersection( otherRange ); // range from ( foo, 1 ) to ( p, 2 ).\n\t *\n\t *\t\totherRange = view.createRange( view.createPositionAt( bar, 1 ), view.createPositionAt( bar, 3 ); \"ar\" is in range.\n\t *\t\ttransformed = range.getIntersection( otherRange ); // null - no common part.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to check for intersection.\n\t * @returns {module:engine/view/range~Range|null} A common part of given ranges or `null` if ranges have no common part.\n\t */\n\tgetIntersection( otherRange ) {\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect, so a common range will be returned.\n\t\t\t// At most, it will be same as this range.\n\t\t\tlet commonRangeStart = this.start;\n\t\t\tlet commonRangeEnd = this.end;\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means thaNt we have to\n\t\t\t\t// shrink common range to the given range start.\n\t\t\t\tcommonRangeStart = otherRange.start;\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// shrink common range to the given range end.\n\t\t\t\tcommonRangeEnd = otherRange.end;\n\t\t\t}\n\n\t\t\treturn new Range( commonRangeStart, commonRangeEnd );\n\t\t}\n\n\t\t// Ranges do not intersect, so they do not have common part.\n\t\treturn null;\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/view/treewalker~TreeWalker TreeWalker} instance with this range as a boundary.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @param {module:engine/view/position~Position} [options.startPosition]\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t * @returns {module:engine/view/treewalker~TreeWalker}\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/node~Node} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of range's both ends (in which the entire range is contained).\n\t *\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor() {\n\t\treturn this.start.getCommonAncestor( this.end );\n\t}\n\n\t/**\n\t * Clones this range.\n\t *\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tclone() {\n\t\treturn new Range( this.start, this.end );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/view/item~Item view items} that are in this range and returns\n\t * them.\n\t *\n\t * This method uses {@link module:engine/view/treewalker~TreeWalker} with `boundaries` set to this range and `ignoreElementEnd` option\n\t * set to `true`. However it returns only {@link module:engine/view/item~Item items},\n\t * not {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/view/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/view/item~Item>}\n\t */\n\t* getItems( options = {} ) {\n\t\toptions.boundaries = this;\n\t\toptions.ignoreElementEnd = true;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.item;\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/view/position~Position positions} that are boundaries or\n\t * contained in this range.\n\t *\n\t * This method uses {@link module:engine/view/treewalker~TreeWalker} with `boundaries` set to this range. However it returns only\n\t * {@link module:engine/view/position~Position positions}, not {@link module:engine/view/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/view/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/view/position~Position>}\n\t */\n\t* getPositions( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tyield treeWalker.position;\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.nextPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\trange.is( 'range' ); // -> true\n\t *\t\trange.is( 'view:range' ); // -> true\n\t *\n\t *\t\trange.is( 'model:range' ); // -> false\n\t *\t\trange.is( 'element' ); // -> false\n\t *\t\trange.is( 'selection' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'range' || type == 'view:range';\n\t}\n\n\t/**\n\t * Checks and returns whether this range intersects with the given range.\n\t *\n\t * @param {module:engine/view/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} True if ranges intersect.\n\t */\n\tisIntersecting( otherRange ) {\n\t\treturn this.start.isBefore( otherRange.end ) && this.end.isAfter( otherRange.start );\n\t}\n\n\t/**\n\t * Creates a range from the given parents and offsets.\n\t *\n\t * @protected\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} startElement Start position\n\t * parent element.\n\t * @param {Number} startOffset Start position offset.\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} endElement End position\n\t * parent element.\n\t * @param {Number} endOffset End position offset.\n\t * @returns {module:engine/view/range~Range} Created range.\n\t */\n\tstatic _createFromParentsAndOffsets( startElement, startOffset, endElement, endOffset ) {\n\t\treturn new this(\n\t\t\tnew Position( startElement, startOffset ),\n\t\t\tnew Position( endElement, endOffset )\n\t\t);\n\t}\n\n\t/**\n\t * Creates a new range, spreading from specified {@link module:engine/view/position~Position position} to a position moved by\n\t * given `shift`. If `shift` is a negative value, shifted position is treated as the beginning of the range.\n\t *\n\t * @protected\n\t * @param {module:engine/view/position~Position} position Beginning of the range.\n\t * @param {Number} shift How long the range should be.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createFromPositionAndShift( position, shift ) {\n\t\tconst start = position;\n\t\tconst end = position.getShiftedBy( shift );\n\n\t\treturn shift > 0 ? new this( start, end ) : new this( end, start );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @protected\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createIn( element ) {\n\t\treturn this._createFromParentsAndOffsets( element, 0, element, element.childCount );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @protected\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tstatic _createOn( item ) {\n\t\tconst size = item.is( 'textProxy' ) ? item.offsetSize : 1;\n\n\t\treturn this._createFromPositionAndShift( Position._createBefore( item ), size );\n\t}\n}\n\n// Function used by getEnlarged and getTrimmed methods.\nfunction enlargeTrimSkip( value ) {\n\tif ( value.item.is( 'attributeElement' ) || value.item.is( 'uiElement' ) ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/count\n */\n\n/**\n * Returns the number of items return by the iterator.\n *\n *\t\tcount( [ 1, 2, 3, 4, 5 ] ); // 5;\n *\n * @param {Iterable.<*>} iterator Any iterator.\n * @returns {Number} Number of items returned by that iterator.\n */\nexport default function count( iterator ) {\n\tlet count = 0;\n\n\tfor ( const _ of iterator ) { // eslint-disable-line no-unused-vars\n\t\tcount++;\n\t}\n\n\treturn count;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/selection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Range from './range';\nimport Position from './position';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport Node from './node';\nimport Element from './element';\nimport count from '@ckeditor/ckeditor5-utils/src/count';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport DocumentSelection from './documentselection';\n\n/**\n * Class representing an arbirtary selection in the view.\n * See also {@link module:engine/view/documentselection~DocumentSelection}.\n *\n * New selection instances can be created via the constructor or one these methods:\n *\n * * {@link module:engine/view/view~View#createSelection `View#createSelection()`},\n * * {@link module:engine/view/upcastwriter~UpcastWriter#createSelection `UpcastWriter#createSelection()`}.\n *\n * A selection can consist of {@link module:engine/view/range~Range ranges} that can be set by using\n * the {@link module:engine/view/selection~Selection#setTo `Selection#setTo()`} method.\n */\nexport default class Selection {\n\t/**\n\t * Creates new selection instance.\n\t *\n\t * **Note**: The selection constructor is available as a factory method:\n\t *\n\t * * {@link module:engine/view/view~View#createSelection `View#createSelection()`},\n\t * * {@link module:engine/view/upcastwriter~UpcastWriter#createSelection `UpcastWriter#createSelection()`}.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tconstructor( selectable = null, placeOrOffset, options ) {\n\t\t/**\n\t\t * Stores all ranges that are selected.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/range~Range>}\n\t\t */\n\t\tthis._ranges = [];\n\n\t\t/**\n\t\t * Specifies whether the last added range was added as a backward or forward range.\n\t\t *\n\t\t * @protected\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._lastRangeBackward = false;\n\n\t\t/**\n\t\t * Specifies whether selection instance is fake.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._isFake = false;\n\n\t\t/**\n\t\t * Fake selection's label.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._fakeSelectionLabel = '';\n\n\t\tthis.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Returns true if selection instance is marked as `fake`.\n\t *\n\t * @see #setTo\n\t * @returns {Boolean}\n\t */\n\tget isFake() {\n\t\treturn this._isFake;\n\t}\n\n\t/**\n\t * Returns fake selection label.\n\t *\n\t * @see #setTo\n\t * @returns {String}\n\t */\n\tget fakeSelectionLabel() {\n\t\treturn this._fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the selection starts. Together with\n\t * {@link #focus focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always the start or end of the most recent added range.\n\t * It may be a bit unintuitive when there are multiple ranges in selection.\n\t *\n\t * @see #focus\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget anchor() {\n\t\tif ( !this._ranges.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\t\tconst anchor = this._lastRangeBackward ? range.end : range.start;\n\n\t\treturn anchor.clone();\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * @see #anchor\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget focus() {\n\t\tif ( !this._ranges.length ) {\n\t\t\treturn null;\n\t\t}\n\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\t\tconst focus = this._lastRangeBackward ? range.start : range.end;\n\n\t\treturn focus.clone();\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.rangeCount === 1 && this._ranges[ 0 ].isCollapsed;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._ranges.length;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus} precedes {@link #anchor}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn !this.isCollapsed && this._lastRangeBackward;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this selection, or `null`\n\t * if the selection is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\tif ( this.anchor ) {\n\t\t\treturn this.anchor.editableElement;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns an iterable that contains copies of all ranges added to the selection.\n\t *\n\t * @returns {Iterable.<module:engine/view/range~Range>}\n\t */\n\t* getRanges() {\n\t\tfor ( const range of this._ranges ) {\n\t\t\tyield range.clone();\n\t\t}\n\t}\n\n\t/**\n\t * Returns copy of the first range in the selection. First range is the one which\n\t * {@link module:engine/view/range~Range#start start} position {@link module:engine/view/position~Position#isBefore is before} start\n\t * position of all other ranges (not to confuse with the first range added to the selection).\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\tlet first = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !first || range.start.isBefore( first.start ) ) {\n\t\t\t\tfirst = range;\n\t\t\t}\n\t\t}\n\n\t\treturn first ? first.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the last range in the selection. Last range is the one which {@link module:engine/view/range~Range#end end}\n\t * position {@link module:engine/view/position~Position#isAfter is after} end position of all other ranges (not to confuse\n\t * with the last range added to the selection). Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\tlet last = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !last || range.end.isAfter( last.end ) ) {\n\t\t\t\tlast = range;\n\t\t\t}\n\t\t}\n\n\t\treturn last ? last.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the first position in the selection. First position is the position that\n\t * {@link module:engine/view/position~Position#isBefore is before} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\tconst firstRange = this.getFirstRange();\n\n\t\treturn firstRange ? firstRange.start.clone() : null;\n\t}\n\n\t/**\n\t * Returns copy of the last position in the selection. Last position is the position that\n\t * {@link module:engine/view/position~Position#isAfter is after} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\tconst lastRange = this.getLastRange();\n\n\t\treturn lastRange ? lastRange.end.clone() : null;\n\t}\n\n\t/**\n\t * Checks whether, this selection is equal to given selection. Selections are equal if they have same directions,\n\t * same number of ranges and all ranges from one selection equal to a range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\tif ( this.isFake != otherSelection.isFake ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isFake && this.fakeSelectionLabel != otherSelection.fakeSelectionLabel ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.rangeCount != otherSelection.rangeCount ) {\n\t\t\treturn false;\n\t\t} else if ( this.rangeCount === 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( !this.anchor.isEqual( otherSelection.anchor ) || !this.focus.isEqual( otherSelection.focus ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tfor ( const thisRange of this._ranges ) {\n\t\t\tlet found = false;\n\n\t\t\tfor ( const otherRange of otherSelection._ranges ) {\n\t\t\t\tif ( thisRange.isEqual( otherRange ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether this selection is similar to given selection. Selections are similar if they have same directions, same\n\t * number of ranges, and all {@link module:engine/view/range~Range#getTrimmed trimmed} ranges from one selection are\n\t * equal to any trimmed range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are similar, `false` otherwise.\n\t */\n\tisSimilar( otherSelection ) {\n\t\tif ( this.isBackward != otherSelection.isBackward ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst numOfRangesA = count( this.getRanges() );\n\t\tconst numOfRangesB = count( otherSelection.getRanges() );\n\n\t\t// If selections have different number of ranges, they cannot be similar.\n\t\tif ( numOfRangesA != numOfRangesB ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If both selections have no ranges, they are similar.\n\t\tif ( numOfRangesA == 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Check if each range in one selection has a similar range in other selection.\n\t\tfor ( let rangeA of this.getRanges() ) {\n\t\t\trangeA = rangeA.getTrimmed();\n\n\t\t\tlet found = false;\n\n\t\t\tfor ( let rangeB of otherSelection.getRanges() ) {\n\t\t\t\trangeB = rangeB.getTrimmed();\n\n\t\t\t\tif ( rangeA.start.isEqual( rangeB.start ) && rangeA.end.isEqual( rangeB.end ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// For `rangeA`, neither range in `otherSelection` was similar. So selections are not similar.\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// There were no ranges that weren't matched. Selections are similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/view/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/view/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\tif ( this.rangeCount !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst range = this.getFirstRange();\n\n\t\tlet nodeAfterStart = range.start.nodeAfter;\n\t\tlet nodeBeforeEnd = range.end.nodeBefore;\n\n\t\t// Handle the situation when selection position is at the beginning / at the end of a text node.\n\t\t// In such situation `.nodeAfter` and `.nodeBefore` are `null` but the selection still might be spanning\n\t\t// over one element.\n\t\t//\n\t\t// <p>Foo{<span class=\"widget\"></span>}bar</p> vs <p>Foo[<span class=\"widget\"></span>]bar</p>\n\t\t//\n\t\t// These are basically the same selections, only the difference is if the selection position is at\n\t\t// at the end/at the beginning of a text node or just before/just after the text node.\n\t\t//\n\t\tif ( range.start.parent.is( 'text' ) && range.start.isAtEnd && range.start.parent.nextSibling ) {\n\t\t\tnodeAfterStart = range.start.parent.nextSibling;\n\t\t}\n\n\t\tif ( range.end.parent.is( 'text' ) && range.end.isAtStart && range.end.parent.previousSibling ) {\n\t\t\tnodeBeforeEnd = range.end.parent.previousSibling;\n\t\t}\n\n\t\treturn ( nodeAfterStart instanceof Element && nodeAfterStart == nodeBeforeEnd ) ? nodeAfterStart : null;\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tselection.setTo( otherSelection );\n\t *\n\t *\t \t// Sets selection to contents of DocumentSelection.\n\t *\t\tselection.setTo( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, path );\n\t *\t\tselection.setTo( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tselection.setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t *\t\tselection.setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tselection.setTo( paragraph, 'on' );\n\t *\n\t * \t\t// Clears selection. Removes all ranges.\n\t *\t\tselection.setTo( null );\n\t *\n\t * `Selection#setTo()` method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\tselection.setTo( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tselection.setTo( range, { fake: true, label: 'foo' } );\n\t *\n\t * @fires change\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tsetTo( selectable, placeOrOffset, options ) {\n\t\tif ( selectable === null ) {\n\t\t\tthis._setRanges( [] );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Selection || selectable instanceof DocumentSelection ) {\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t\tthis._setFakeOptions( { fake: selectable.isFake, label: selectable.fakeSelectionLabel } );\n\t\t} else if ( selectable instanceof Range ) {\n\t\t\tthis._setRanges( [ selectable ], placeOrOffset && placeOrOffset.backward );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Position ) {\n\t\t\tthis._setRanges( [ new Range( selectable ) ] );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else if ( selectable instanceof Node ) {\n\t\t\tconst backward = !!options && !!options.backward;\n\t\t\tlet range;\n\n\t\t\tif ( placeOrOffset === undefined ) {\n\t\t\t\t/**\n\t\t\t\t * selection.setTo requires the second parameter when the first parameter is a node.\n\t\t\t\t *\n\t\t\t\t * @error view-selection-setTo-required-second-parameter\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-selection-setTo-required-second-parameter: ' +\n\t\t\t\t\t'selection.setTo requires the second parameter when the first parameter is a node.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t} else if ( placeOrOffset == 'in' ) {\n\t\t\t\trange = Range._createIn( selectable );\n\t\t\t} else if ( placeOrOffset == 'on' ) {\n\t\t\t\trange = Range._createOn( selectable );\n\t\t\t} else {\n\t\t\t\trange = new Range( Position._createAt( selectable, placeOrOffset ) );\n\t\t\t}\n\n\t\t\tthis._setRanges( [ range ], backward );\n\t\t\tthis._setFakeOptions( options );\n\t\t} else if ( isIterable( selectable ) ) {\n\t\t\t// We assume that the selectable is an iterable of ranges.\n\t\t\t// Array.from() is used to prevent setting ranges to the old iterable\n\t\t\tthis._setRanges( selectable, placeOrOffset && placeOrOffset.backward );\n\t\t\tthis._setFakeOptions( placeOrOffset );\n\t\t} else {\n\t\t\t/**\n\t\t\t * Cannot set selection to given place.\n\t\t\t *\n\t\t\t * @error view-selection-setTo-not-selectable\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-selection-setTo-not-selectable: Cannot set selection to given place.', this );\n\t\t}\n\n\t\tthis.fire( 'change' );\n\t}\n\n\t/**\n\t * Moves {@link #focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @fires change\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tsetFocus( itemOrPosition, offset ) {\n\t\tif ( this.anchor === null ) {\n\t\t\t/**\n\t\t\t * Cannot set selection focus if there are no ranges in selection.\n\t\t\t *\n\t\t\t * @error view-selection-setFocus-no-ranges\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst newFocus = Position._createAt( itemOrPosition, offset );\n\n\t\tif ( newFocus.compareWith( this.focus ) == 'same' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst anchor = this.anchor;\n\n\t\tthis._ranges.pop();\n\n\t\tif ( newFocus.compareWith( anchor ) == 'before' ) {\n\t\t\tthis._addRange( new Range( newFocus, anchor ), true );\n\t\t} else {\n\t\t\tthis._addRange( new Range( anchor, newFocus ) );\n\t\t}\n\n\t\tthis.fire( 'change' );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'view:selection' ); // -> true\n\t *\n\t *\t\tselection.is( 'model:selection' ); // -> false\n\t *\t\tselection.is( 'element' ); // -> false\n\t *\t\tselection.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' || type == 'view:selection';\n\t}\n\n\t/**\n\t * Replaces all ranges that were added to the selection with given array of ranges. Last range of the array\n\t * is treated like the last added range and is used to set {@link #anchor anchor} and {@link #focus focus}.\n\t * Accepts a flag describing in which way the selection is made.\n\t *\n\t * @private\n\t * @param {Iterable.<module:engine/view/range~Range>} newRanges Iterable object of ranges to set.\n\t * @param {Boolean} [isLastBackward=false] Flag describing if last added range was selected forward - from start to end\n\t * (`false`) or backward - from end to start (`true`). Defaults to `false`.\n\t */\n\t_setRanges( newRanges, isLastBackward = false ) {\n\t\t// New ranges should be copied to prevent removing them by setting them to `[]` first.\n\t\t// Only applies to situations when selection is set to the same selection or same selection's ranges.\n\t\tnewRanges = Array.from( newRanges );\n\n\t\tthis._ranges = [];\n\n\t\tfor ( const range of newRanges ) {\n\t\t\tthis._addRange( range );\n\t\t}\n\n\t\tthis._lastRangeBackward = !!isLastBackward;\n\t}\n\n\t/**\n\t * Sets this selection instance to be marked as `fake`. A fake selection does not render as browser native selection\n\t * over selected elements and is hidden to the user. This way, no native selection UI artifacts are displayed to\n\t * the user and selection over elements can be represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM (and be\n\t * properly handled by screen readers).\n\t *\n\t * @private\n\t * @param {Object} [options] Options.\n\t * @param {Boolean} [options.fake] If set to true selection will be marked as `fake`.\n\t * @param {String} [options.label=''] Fake selection label.\n\t */\n\t_setFakeOptions( options = {} ) {\n\t\tthis._isFake = !!options.fake;\n\t\tthis._fakeSelectionLabel = options.fake ? options.label || '' : '';\n\t}\n\n\t/**\n\t * Adds a range to the selection. Added range is copied. This means that passed range is not saved in the\n\t * selection instance and you can safely operate on it.\n\t *\n\t * Accepts a flag describing in which way the selection is made - passed range might be selected from\n\t * {@link module:engine/view/range~Range#start start} to {@link module:engine/view/range~Range#end end}\n\t * or from {@link module:engine/view/range~Range#end end} to {@link module:engine/view/range~Range#start start}.\n\t * The flag is used to set {@link #anchor anchor} and {@link #focus focus} properties.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-selection-range-intersects` if added range intersects\n\t * with ranges already stored in Selection instance.\n\t *\n\t * @private\n\t * @fires change\n\t * @param {module:engine/view/range~Range} range\n\t * @param {Boolean} [isBackward]\n\t */\n\t_addRange( range, isBackward = false ) {\n\t\tif ( !( range instanceof Range ) ) {\n\t\t\t/**\n\t\t\t * Selection range set to an object that is not an instance of {@link module:engine/view/range~Range}.\n\t\t\t *\n\t\t\t * @error view-selection-add-range-not-range\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-selection-add-range-not-range: ' +\n\t\t\t\t'Selection range set to an object that is not an instance of view.Range',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tthis._pushRange( range );\n\t\tthis._lastRangeBackward = !!isBackward;\n\t}\n\n\t/**\n\t * Adds range to selection - creates copy of given range so it can be safely used and modified.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-selection-range-intersects` if added range intersects\n\t * with ranges already stored in selection instance.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t */\n\t_pushRange( range ) {\n\t\tfor ( const storedRange of this._ranges ) {\n\t\t\tif ( range.isIntersecting( storedRange ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to add a range that intersects with another range from selection.\n\t\t\t\t *\n\t\t\t\t * @error view-selection-range-intersects\n\t\t\t\t * @param {module:engine/view/range~Range} addedRange Range that was added to the selection.\n\t\t\t\t * @param {module:engine/view/range~Range} intersectingRange Range from selection that intersects with `addedRange`.\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'view-selection-range-intersects: Trying to add a range that intersects with another range from selection.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ addedRange: range, intersectingRange: storedRange }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tthis._ranges.push( new Range( range.start, range.end ) );\n\t}\n\n\t/**\n\t * Fired whenever selection ranges are changed through {@link ~Selection Selection API}.\n\t *\n\t * @event change\n\t */\n}\n\nmix( Selection, EmitterMixin );\n\n/**\n * An entity that is used to set selection.\n *\n * See also {@link module:engine/view/selection~Selection#setTo}\n *\n * @typedef {\n * module:engine/view/selection~Selection|\n * module:engine/view/documentselection~DocumentSelection|\n * module:engine/view/position~Position|\n * Iterable.<module:engine/view/range~Range>|\n * module:engine/view/range~Range|\n * module:engine/view/item~Item|\n * null\n * } module:engine/view/selection~Selectable\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/documentselection\n */\n\nimport Selection from './selection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\n/**\n * Class representing the document selection in the view.\n *\n * Its instance is available in {@link module:engine/view/document~Document#selection `Document#selection`}.\n *\n * It is similar to {@link module:engine/view/selection~Selection} but\n * it has a read-only API and can be modified only by the writer available in\n * the {@link module:engine/view/view~View#change `View#change()`} block\n * (so via {@link module:engine/view/downcastwriter~DowncastWriter#setSelection `DowncastWriter#setSelection()`}).\n */\nexport default class DocumentSelection {\n\t/**\n\t * Creates new DocumentSelection instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = new DocumentSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = new DocumentSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\tconst selection = new DocumentSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = new DocumentSelection( otherSelection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, offset );\n\t *\t\tconst selection = new DocumentSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = new DocumentSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = new DocumentSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = new DocumentSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = new DocumentSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = new DocumentSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tconstructor( selectable = null, placeOrOffset, options ) {\n\t\t/**\n\t\t * Selection is used internally (`DocumentSelection` is a proxy to that selection).\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/selection~Selection}\n\t\t */\n\t\tthis._selection = new Selection();\n\n\t\t// Delegate change event to be fired on DocumentSelection instance.\n\t\tthis._selection.delegate( 'change' ).to( this );\n\n\t\t// Set selection data.\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Returns true if selection instance is marked as `fake`.\n\t *\n\t * @see #_setTo\n\t * @returns {Boolean}\n\t */\n\tget isFake() {\n\t\treturn this._selection.isFake;\n\t}\n\n\t/**\n\t * Returns fake selection label.\n\t *\n\t * @see #_setTo\n\t * @returns {String}\n\t */\n\tget fakeSelectionLabel() {\n\t\treturn this._selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the selection starts. Together with\n\t * {@link #focus focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always the start or end of the most recent added range.\n\t * It may be a bit unintuitive when there are multiple ranges in selection.\n\t *\n\t * @see #focus\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget anchor() {\n\t\treturn this._selection.anchor;\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * @see #anchor\n\t * @type {module:engine/view/position~Position}\n\t */\n\tget focus() {\n\t\treturn this._selection.focus;\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this._selection.isCollapsed;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._selection.rangeCount;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus} precedes {@link #anchor}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn this._selection.isBackward;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this selection, or `null`\n\t * if the selection is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\treturn this._selection.editableElement;\n\t}\n\n\t/**\n\t * Used for the compatibility with the {@link module:engine/view/selection~Selection#isEqual} method.\n\t *\n\t * @protected\n\t */\n\tget _ranges() {\n\t\treturn this._selection._ranges;\n\t}\n\n\t/**\n\t * Returns an iterable that contains copies of all ranges added to the selection.\n\t *\n\t * @returns {Iterable.<module:engine/view/range~Range>}\n\t */\n\t* getRanges() {\n\t\tyield* this._selection.getRanges();\n\t}\n\n\t/**\n\t * Returns copy of the first range in the selection. First range is the one which\n\t * {@link module:engine/view/range~Range#start start} position {@link module:engine/view/position~Position#isBefore is before} start\n\t * position of all other ranges (not to confuse with the first range added to the selection).\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\treturn this._selection.getFirstRange();\n\t}\n\n\t/**\n\t * Returns copy of the last range in the selection. Last range is the one which {@link module:engine/view/range~Range#end end}\n\t * position {@link module:engine/view/position~Position#isAfter is after} end position of all other ranges (not to confuse\n\t * with the last range added to the selection). Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\treturn this._selection.getLastRange();\n\t}\n\n\t/**\n\t * Returns copy of the first position in the selection. First position is the position that\n\t * {@link module:engine/view/position~Position#isBefore is before} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\treturn this._selection.getFirstPosition();\n\t}\n\n\t/**\n\t * Returns copy of the last position in the selection. Last position is the position that\n\t * {@link module:engine/view/position~Position#isAfter is after} any other position in the selection ranges.\n\t * Returns `null` if no ranges are added to selection.\n\t *\n\t * @returns {module:engine/view/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\treturn this._selection.getLastPosition();\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/view/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/view/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\treturn this._selection.getSelectedElement();\n\t}\n\n\t/**\n\t * Checks whether, this selection is equal to given selection. Selections are equal if they have same directions,\n\t * same number of ranges and all ranges from one selection equal to a range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\treturn this._selection.isEqual( otherSelection );\n\t}\n\n\t/**\n\t * Checks whether this selection is similar to given selection. Selections are similar if they have same directions, same\n\t * number of ranges, and all {@link module:engine/view/range~Range#getTrimmed trimmed} ranges from one selection are\n\t * equal to any trimmed range from other selection.\n\t *\n\t * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are similar, `false` otherwise.\n\t */\n\tisSimilar( otherSelection ) {\n\t\treturn this._selection.isSimilar( otherSelection );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocSelection.is( 'selection' ); // -> true\n\t *\t\tdocSelection.is( 'documentSelection' ); // -> true\n\t *\t\tdocSelection.is( 'view:selection' ); // -> true\n\t *\t\tdocSelection.is( 'view:documentSelection' ); // -> true\n\t *\n\t *\t\tdocSelection.is( 'model:documentSelection' ); // -> false\n\t *\t\tdocSelection.is( 'element' ); // -> false\n\t *\t\tdocSelection.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' ||\n\t\t\ttype == 'documentSelection' ||\n\t\t\ttype == 'view:selection' ||\n\t\t\ttype == 'view:documentSelection';\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tdocumentSelection._setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\tdocumentSelection._setTo( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tdocumentSelection._setTo( otherSelection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionAt( root, offset );\n\t *\t\tdocumentSelection._setTo( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tdocumentSelection._setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t *\t\tdocumentSelection._setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tdocumentSelection._setTo( paragraph, 'on' );\n\t *\n\t * \t\t// Clears selection. Removes all ranges.\n\t *\t\tdocumentSelection._setTo( null );\n\t *\n\t * `Selection#_setTo()` method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\tdocumentSelection._setTo( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to des cribe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tdocumentSelection._setTo( range, { fake: true, label: 'foo' } );\n\t *\n\t * @protected\n\t * @fires change\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\t_setTo( selectable, placeOrOffset, options ) {\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link #focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @protected\n\t * @fires change\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\t_setFocus( itemOrPosition, offset ) {\n\t\tthis._selection.setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Fired whenever selection ranges are changed through {@link ~DocumentSelection Selection API}.\n\t *\n\t * @event change\n\t */\n}\n\nmix( DocumentSelection, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/collection\n */\n\nimport EmitterMixin from './emittermixin';\nimport CKEditorError from './ckeditorerror';\nimport uid from './uid';\nimport mix from './mix';\n\n/**\n * Collections are ordered sets of objects. Items in the collection can be retrieved by their indexes\n * in the collection (like in an array) or by their ids.\n *\n * If an object without an `id` property is being added to the collection, the `id` property will be generated\n * automatically. Note that the automatically generated id is unique only within this single collection instance.\n *\n * By default an item in the collection is identified by its `id` property. The name of the identifier can be\n * configured through the constructor of the collection.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Collection {\n\t/**\n\t * Creates a new Collection instance.\n\t *\n\t * @param {Object} [options={}] The options object.\n\t * @param {String} [options.idProperty='id'] The name of the property which is considered to identify an item.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The internal list of items in the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Object[]}\n\t\t */\n\t\tthis._items = [];\n\n\t\t/**\n\t\t * The internal map of items in the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._itemMap = new Map();\n\n\t\t/**\n\t\t * The name of the property which is considered to identify an item.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._idProperty = options.idProperty || 'id';\n\n\t\t/**\n\t\t * A helper mapping external items of a bound collection ({@link #bindTo})\n\t\t * and actual items of this collection. It provides information\n\t\t * necessary to properly remove items bound to another collection.\n\t\t *\n\t\t * See {@link #_bindToInternalToExternalMap}.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._bindToExternalToInternalMap = new WeakMap();\n\n\t\t/**\n\t\t * A helper mapping items of this collection to external items of a bound collection\n\t\t * ({@link #bindTo}). It provides information necessary to manage the bindings, e.g.\n\t\t * to avoid loops in two–way bindings.\n\t\t *\n\t\t * See {@link #_bindToExternalToInternalMap}.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._bindToInternalToExternalMap = new WeakMap();\n\n\t\t/**\n\t\t * Stores indexes of skipped items from bound external collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Array}\n\t\t */\n\t\tthis._skippedIndexesFromExternal = [];\n\n\t\t/**\n\t\t * A collection instance this collection is bound to as a result\n\t\t * of calling {@link #bindTo} method.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/collection~Collection} #_bindToCollection\n\t\t */\n\t}\n\n\t/**\n\t * The number of items available in the collection.\n\t *\n\t * @member {Number} #length\n\t */\n\tget length() {\n\t\treturn this._items.length;\n\t}\n\n\t/**\n\t * Returns the first item from the collection or null when collection is empty.\n\t *\n\t * @returns {Object|null} The first item or `null` if collection is empty.\n\t */\n\tget first() {\n\t\treturn this._items[ 0 ] || null;\n\t}\n\n\t/**\n\t * Returns the last item from the collection or null when collection is empty.\n\t *\n\t * @returns {Object|null} The last item or `null` if collection is empty.\n\t */\n\tget last() {\n\t\treturn this._items[ this.length - 1 ] || null;\n\t}\n\n\t/**\n\t * Adds an item into the collection.\n\t *\n\t * If the item does not have an id, then it will be automatically generated and set on the item.\n\t *\n\t * @chainable\n\t * @param {Object} item\n\t * @param {Number} [index] The position of the item in the collection. The item\n\t * is pushed to the collection when `index` not specified.\n\t * @fires add\n\t */\n\tadd( item, index ) {\n\t\tlet itemId;\n\t\tconst idProperty = this._idProperty;\n\n\t\tif ( ( idProperty in item ) ) {\n\t\t\titemId = item[ idProperty ];\n\n\t\t\tif ( typeof itemId != 'string' ) {\n\t\t\t\t/**\n\t\t\t\t * This item's id should be a string.\n\t\t\t\t *\n\t\t\t\t * @error collection-add-invalid-id\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'collection-add-invalid-id', this );\n\t\t\t}\n\n\t\t\tif ( this.get( itemId ) ) {\n\t\t\t\t/**\n\t\t\t\t * This item already exists in the collection.\n\t\t\t\t *\n\t\t\t\t * @error collection-add-item-already-exists\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'collection-add-item-already-exists', this );\n\t\t\t}\n\t\t} else {\n\t\t\titem[ idProperty ] = itemId = uid();\n\t\t}\n\n\t\t// TODO: Use ES6 default function argument.\n\t\tif ( index === undefined ) {\n\t\t\tindex = this._items.length;\n\t\t} else if ( index > this._items.length || index < 0 ) {\n\t\t\t/**\n\t\t\t * The index number has invalid value.\n\t\t\t *\n\t\t\t * @error collection-add-item-bad-index\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-add-item-invalid-index', this );\n\t\t}\n\n\t\tthis._items.splice( index, 0, item );\n\n\t\tthis._itemMap.set( itemId, item );\n\n\t\tthis.fire( 'add', item, index );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Gets item by its id or index.\n\t *\n\t * @param {String|Number} idOrIndex The item id or index in the collection.\n\t * @returns {Object|null} The requested item or `null` if such item does not exist.\n\t */\n\tget( idOrIndex ) {\n\t\tlet item;\n\n\t\tif ( typeof idOrIndex == 'string' ) {\n\t\t\titem = this._itemMap.get( idOrIndex );\n\t\t} else if ( typeof idOrIndex == 'number' ) {\n\t\t\titem = this._items[ idOrIndex ];\n\t\t} else {\n\t\t\t/**\n\t\t\t * Index or id must be given.\n\t\t\t *\n\t\t\t * @error collection-get-invalid-arg\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-get-invalid-arg: Index or id must be given.', this );\n\t\t}\n\n\t\treturn item || null;\n\t}\n\n\t/**\n\t * Returns a boolean indicating whether the collection contains an item.\n\t *\n\t * @param {Object|String} itemOrId The item or its id in the collection.\n\t * @returns {Boolean} `true` if the collection contains the item, `false` otherwise.\n\t */\n\thas( itemOrId ) {\n\t\tif ( typeof itemOrId == 'string' ) {\n\t\t\treturn this._itemMap.has( itemOrId );\n\t\t} else { // Object\n\t\t\tconst idProperty = this._idProperty;\n\t\t\tconst id = itemOrId[ idProperty ];\n\n\t\t\treturn this._itemMap.has( id );\n\t\t}\n\t}\n\n\t/**\n\t * Gets index of item in the collection.\n\t * When item is not defined in the collection then index will be equal -1.\n\t *\n\t * @param {Object|String} itemOrId The item or its id in the collection.\n\t * @returns {Number} Index of given item.\n\t */\n\tgetIndex( itemOrId ) {\n\t\tlet item;\n\n\t\tif ( typeof itemOrId == 'string' ) {\n\t\t\titem = this._itemMap.get( itemOrId );\n\t\t} else {\n\t\t\titem = itemOrId;\n\t\t}\n\n\t\treturn this._items.indexOf( item );\n\t}\n\n\t/**\n\t * Removes an item from the collection.\n\t *\n\t * @param {Object|Number|String} subject The item to remove, its id or index in the collection.\n\t * @returns {Object} The removed item.\n\t * @fires remove\n\t */\n\tremove( subject ) {\n\t\tlet index, id, item;\n\t\tlet itemDoesNotExist = false;\n\t\tconst idProperty = this._idProperty;\n\n\t\tif ( typeof subject == 'string' ) {\n\t\t\tid = subject;\n\t\t\titem = this._itemMap.get( id );\n\t\t\titemDoesNotExist = !item;\n\n\t\t\tif ( item ) {\n\t\t\t\tindex = this._items.indexOf( item );\n\t\t\t}\n\t\t} else if ( typeof subject == 'number' ) {\n\t\t\tindex = subject;\n\t\t\titem = this._items[ index ];\n\t\t\titemDoesNotExist = !item;\n\n\t\t\tif ( item ) {\n\t\t\t\tid = item[ idProperty ];\n\t\t\t}\n\t\t} else {\n\t\t\titem = subject;\n\t\t\tid = item[ idProperty ];\n\t\t\tindex = this._items.indexOf( item );\n\t\t\titemDoesNotExist = ( index == -1 || !this._itemMap.get( id ) );\n\t\t}\n\n\t\tif ( itemDoesNotExist ) {\n\t\t\t/**\n\t\t\t * Item not found.\n\t\t\t *\n\t\t\t * @error collection-remove-404\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-remove-404: Item not found.', this );\n\t\t}\n\n\t\tthis._items.splice( index, 1 );\n\t\tthis._itemMap.delete( id );\n\n\t\tconst externalItem = this._bindToInternalToExternalMap.get( item );\n\t\tthis._bindToInternalToExternalMap.delete( item );\n\t\tthis._bindToExternalToInternalMap.delete( externalItem );\n\n\t\tthis.fire( 'remove', item, index );\n\n\t\treturn item;\n\t}\n\n\t/**\n\t * Executes the callback for each item in the collection and composes an array or values returned by this callback.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Array} The result of mapping.\n\t */\n\tmap( callback, ctx ) {\n\t\treturn this._items.map( callback, ctx );\n\t}\n\n\t/**\n\t * Finds the first item in the collection for which the `callback` returns a true value.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Object} The item for which `callback` returned a true value.\n\t */\n\tfind( callback, ctx ) {\n\t\treturn this._items.find( callback, ctx );\n\t}\n\n\t/**\n\t * Returns an array with items for which the `callback` returned a true value.\n\t *\n\t * @param {Function} callback\n\t * @param {Object} callback.item\n\t * @param {Number} callback.index\n\t * @param {Object} ctx Context in which the `callback` will be called.\n\t * @returns {Object[]} The array with matching items.\n\t */\n\tfilter( callback, ctx ) {\n\t\treturn this._items.filter( callback, ctx );\n\t}\n\n\t/**\n\t * Removes all items from the collection and destroys the binding created using\n\t * {@link #bindTo}.\n\t */\n\tclear() {\n\t\tif ( this._bindToCollection ) {\n\t\t\tthis.stopListening( this._bindToCollection );\n\t\t\tthis._bindToCollection = null;\n\t\t}\n\n\t\twhile ( this.length ) {\n\t\t\tthis.remove( 0 );\n\t\t}\n\t}\n\n\t/**\n\t * Binds and synchronizes the collection with another one.\n\t *\n\t * The binding can be a simple factory:\n\t *\n\t *\t\tclass FactoryClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).as( FactoryClass );\n\t *\n\t *\t\tsource.add( { label: 'foo' } );\n\t *\t\tsource.add( { label: 'bar' } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 1 ).label ); // 'bar'\n\t *\n\t *\t\tsource.remove( 0 );\n\t *\t\tconsole.log( target.length ); // 1\n\t *\t\tconsole.log( target.get( 0 ).label ); // 'bar'\n\t *\n\t * or the factory driven by a custom callback:\n\t *\n\t *\t\tclass FooClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tclass BarClass {\n\t *\t\t\tconstructor( data ) {\n\t *\t\t\t\tthis.label = data.label;\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( ( item ) => {\n\t *\t\t\tif ( item.label == 'foo' ) {\n\t *\t\t\t\treturn new FooClass( item );\n\t *\t\t\t} else {\n\t *\t\t\t\treturn new BarClass( item );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\tsource.add( { label: 'foo' } );\n\t *\t\tsource.add( { label: 'bar' } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 0 ) instanceof FooClass ); // true\n\t *\t\tconsole.log( target.get( 1 ) instanceof BarClass ); // true\n\t *\n\t * or the factory out of property name:\n\t *\n\t *\t\tconst source = new Collection( { idProperty: 'label' } );\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( 'label' );\n\t *\n\t *\t\tsource.add( { label: { value: 'foo' } } );\n\t *\t\tsource.add( { label: { value: 'bar' } } );\n\t *\n\t *\t\tconsole.log( target.length ); // 2\n\t *\t\tconsole.log( target.get( 0 ).value ); // 'foo'\n\t *\t\tconsole.log( target.get( 1 ).value ); // 'bar'\n\t *\n\t * It's possible to skip specified items by returning falsy value:\n\t *\n\t *\t\tconst source = new Collection();\n\t *\t\tconst target = new Collection();\n\t *\n\t *\t\ttarget.bindTo( source ).using( item => {\n\t *\t\t\tif ( item.hidden ) {\n\t *\t\t\t\treturn null;\n\t *\t\t\t}\n\t *\n\t *\t\t\treturn item;\n\t *\t\t} );\n\t *\n\t *\t\tsource.add( { hidden: true } );\n\t *\t\tsource.add( { hidden: false } );\n\t *\n\t *\t\tconsole.log( source.length ); // 2\n\t *\t\tconsole.log( target.length ); // 1\n\t *\n\t * **Note**: {@link #clear} can be used to break the binding.\n\t *\n\t * @param {module:utils/collection~Collection} externalCollection A collection to be bound.\n\t * @returns {Object}\n\t * @returns {module:utils/collection~CollectionBindToChain} The binding chain object.\n\t */\n\tbindTo( externalCollection ) {\n\t\tif ( this._bindToCollection ) {\n\t\t\t/**\n\t\t\t * The collection cannot be bound more than once.\n\t\t\t *\n\t\t\t * @error collection-bind-to-rebind\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'collection-bind-to-rebind: The collection cannot be bound more than once.', this );\n\t\t}\n\n\t\tthis._bindToCollection = externalCollection;\n\n\t\treturn {\n\t\t\tas: Class => {\n\t\t\t\tthis._setUpBindToBinding( item => new Class( item ) );\n\t\t\t},\n\n\t\t\tusing: callbackOrProperty => {\n\t\t\t\tif ( typeof callbackOrProperty == 'function' ) {\n\t\t\t\t\tthis._setUpBindToBinding( item => callbackOrProperty( item ) );\n\t\t\t\t} else {\n\t\t\t\t\tthis._setUpBindToBinding( item => item[ callbackOrProperty ] );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Finalizes and activates a binding initiated by {#bindTo}.\n\t *\n\t * @protected\n\t * @param {Function} factory A function which produces collection items.\n\t */\n\t_setUpBindToBinding( factory ) {\n\t\tconst externalCollection = this._bindToCollection;\n\n\t\t// Adds the item to the collection once a change has been done to the external collection.\n\t\t//\n\t\t// @private\n\t\tconst addItem = ( evt, externalItem, index ) => {\n\t\t\tconst isExternalBoundToThis = externalCollection._bindToCollection == this;\n\t\t\tconst externalItemBound = externalCollection._bindToInternalToExternalMap.get( externalItem );\n\n\t\t\t// If an external collection is bound to this collection, which makes it a 2–way binding,\n\t\t\t// and the particular external collection item is already bound, don't add it here.\n\t\t\t// The external item has been created **out of this collection's item** and (re)adding it will\n\t\t\t// cause a loop.\n\t\t\tif ( isExternalBoundToThis && externalItemBound ) {\n\t\t\t\tthis._bindToExternalToInternalMap.set( externalItem, externalItemBound );\n\t\t\t\tthis._bindToInternalToExternalMap.set( externalItemBound, externalItem );\n\t\t\t} else {\n\t\t\t\tconst item = factory( externalItem );\n\n\t\t\t\t// When there is no item we need to remember skipped index first and then we can skip this item.\n\t\t\t\tif ( !item ) {\n\t\t\t\t\tthis._skippedIndexesFromExternal.push( index );\n\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Lets try to put item at the same index as index in external collection\n\t\t\t\t// but when there are a skipped items in one or both collections we need to recalculate this index.\n\t\t\t\tlet finalIndex = index;\n\n\t\t\t\t// When we try to insert item after some skipped items from external collection we need\n\t\t\t\t// to include this skipped items and decrease index.\n\t\t\t\t//\n\t\t\t\t// For the following example:\n\t\t\t\t// external -> [ 'A', 'B - skipped for internal', 'C - skipped for internal' ]\n\t\t\t\t// internal -> [ A ]\n\t\t\t\t//\n\t\t\t\t// Another item is been added at the end of external collection:\n\t\t\t\t// external.add( 'D' )\n\t\t\t\t// external -> [ 'A', 'B - skipped for internal', 'C - skipped for internal', 'D' ]\n\t\t\t\t//\n\t\t\t\t// We can't just add 'D' to internal at the same index as index in external because\n\t\t\t\t// this will produce empty indexes what is invalid:\n\t\t\t\t// internal -> [ 'A', empty, empty, 'D' ]\n\t\t\t\t//\n\t\t\t\t// So we need to include skipped items and decrease index\n\t\t\t\t// internal -> [ 'A', 'D' ]\n\t\t\t\tfor ( const skipped of this._skippedIndexesFromExternal ) {\n\t\t\t\t\tif ( index > skipped ) {\n\t\t\t\t\t\tfinalIndex--;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// We need to take into consideration that external collection could skip some items from\n\t\t\t\t// internal collection.\n\t\t\t\t//\n\t\t\t\t// For the following example:\n\t\t\t\t// internal -> [ 'A', 'B - skipped for external', 'C - skipped for external' ]\n\t\t\t\t// external -> [ A ]\n\t\t\t\t//\n\t\t\t\t// Another item is been added at the end of external collection:\n\t\t\t\t// external.add( 'D' )\n\t\t\t\t// external -> [ 'A', 'D' ]\n\t\t\t\t//\n\t\t\t\t// We need to include skipped items and place new item after them:\n\t\t\t\t// internal -> [ 'A', 'B - skipped for external', 'C - skipped for external', 'D' ]\n\t\t\t\tfor ( const skipped of externalCollection._skippedIndexesFromExternal ) {\n\t\t\t\t\tif ( finalIndex >= skipped ) {\n\t\t\t\t\t\tfinalIndex++;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tthis._bindToExternalToInternalMap.set( externalItem, item );\n\t\t\t\tthis._bindToInternalToExternalMap.set( item, externalItem );\n\t\t\t\tthis.add( item, finalIndex );\n\n\t\t\t\t// After adding new element to internal collection we need update indexes\n\t\t\t\t// of skipped items in external collection.\n\t\t\t\tfor ( let i = 0; i < externalCollection._skippedIndexesFromExternal.length; i++ ) {\n\t\t\t\t\tif ( finalIndex <= externalCollection._skippedIndexesFromExternal[ i ] ) {\n\t\t\t\t\t\texternalCollection._skippedIndexesFromExternal[ i ]++;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\t// Load the initial content of the collection.\n\t\tfor ( const externalItem of externalCollection ) {\n\t\t\taddItem( null, externalItem, externalCollection.getIndex( externalItem ) );\n\t\t}\n\n\t\t// Synchronize the with collection as new items are added.\n\t\tthis.listenTo( externalCollection, 'add', addItem );\n\n\t\t// Synchronize the with collection as new items are removed.\n\t\tthis.listenTo( externalCollection, 'remove', ( evt, externalItem, index ) => {\n\t\t\tconst item = this._bindToExternalToInternalMap.get( externalItem );\n\n\t\t\tif ( item ) {\n\t\t\t\tthis.remove( item );\n\t\t\t}\n\n\t\t\t// After removing element from external collection we need update/remove indexes\n\t\t\t// of skipped items in internal collection.\n\t\t\tthis._skippedIndexesFromExternal = this._skippedIndexesFromExternal.reduce( ( result, skipped ) => {\n\t\t\t\tif ( index < skipped ) {\n\t\t\t\t\tresult.push( skipped - 1 );\n\t\t\t\t}\n\n\t\t\t\tif ( index > skipped ) {\n\t\t\t\t\tresult.push( skipped );\n\t\t\t\t}\n\n\t\t\t\treturn result;\n\t\t\t}, [] );\n\t\t} );\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._items[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Fired when an item is added to the collection.\n\t *\n\t * @event add\n\t * @param {Object} item The added item.\n\t */\n\n\t/**\n\t * Fired when an item is removed from the collection.\n\t *\n\t * @event remove\n\t * @param {Object} item The removed item.\n\t * @param {Number} index Index from which item was removed.\n\t */\n}\n\nmix( Collection, EmitterMixin );\n\n/**\n * An object returned by the {@link module:utils/collection~Collection#bindTo `bindTo()`} method\n * providing functions that specify the type of the binding.\n *\n * See the {@link module:utils/collection~Collection#bindTo `bindTo()`} documentation for examples.\n *\n * @interface module:utils/collection~CollectionBindToChain\n */\n\n/**\n * Creates a callback or a property binding.\n *\n * @method #using\n * @param {Function|String} callbackOrProperty When the function is passed, it should return\n * the collection items. When the string is provided, the property value is used to create the bound collection items.\n */\n\n/**\n * Creates the class factory binding in which items of the source collection are passed to\n * the constructor of the specified class.\n *\n * @method #as\n * @param {Function} Class The class constructor used to create instances in the factory.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/document\n */\n\nimport DocumentSelection from './documentselection';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\n\n// @if CK_DEBUG_ENGINE // const { logDocument } = require( '../dev-utils/utils' );\n\n/**\n * Document class creates an abstract layer over the content editable area, contains a tree of view elements and\n * {@link module:engine/view/documentselection~DocumentSelection view selection} associated with this document.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Document {\n\t/**\n\t * Creates a Document instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Selection done on this document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection} module:engine/view/document~Document#selection\n\t\t */\n\t\tthis.selection = new DocumentSelection();\n\n\t\t/**\n\t\t * Roots of the view tree. Collection of the {@link module:engine/view/element~Element view elements}.\n\t\t *\n\t\t * View roots are created as a result of binding between {@link module:engine/view/document~Document#roots} and\n\t\t * {@link module:engine/model/document~Document#roots} and this is handled by\n\t\t * {@link module:engine/controller/editingcontroller~EditingController}, so to create view root we need to create\n\t\t * model root using {@link module:engine/model/document~Document#createRoot}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/collection~Collection} module:engine/view/document~Document#roots\n\t\t */\n\t\tthis.roots = new Collection( { idProperty: 'rootName' } );\n\n\t\t/**\n\t\t * Defines whether document is in read-only mode.\n\t\t *\n\t\t * When document is read-ony then all roots are read-only as well and caret placed inside this root is hidden.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * True if document is focused.\n\t\t *\n\t\t * This property is updated by the {@link module:engine/view/observer/focusobserver~FocusObserver}.\n\t\t * If the {@link module:engine/view/observer/focusobserver~FocusObserver} is disabled this property will not change.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/document~Document#isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * True if composition is in progress inside the document.\n\t\t *\n\t\t * This property is updated by the {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n\t\t * If the {@link module:engine/view/observer/compositionobserver~CompositionObserver} is disabled this property will not change.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} module:engine/view/document~Document#isComposing\n\t\t */\n\t\tthis.set( 'isComposing', false );\n\n\t\t/**\n\t\t * Post-fixer callbacks registered to the view document.\n\t\t *\n\t\t * @private\n\t\t * @member {Set}\n\t\t */\n\t\tthis._postFixers = new Set();\n\t}\n\n\t/**\n\t * Gets a {@link module:engine/view/document~Document#roots view root element} with the specified name. If the name is not\n\t * specific \"main\" root is returned.\n\t *\n\t * @param {String} [name='main'] Name of the root.\n\t * @returns {module:engine/view/rooteditableelement~RootEditableElement|null} The view root element with the specified name\n\t * or null when there is no root of given name.\n\t */\n\tgetRoot( name = 'main' ) {\n\t\treturn this.roots.get( name );\n\t}\n\n\t/**\n\t * Allows registering post-fixer callbacks. A post-fixers mechanism allows to update the view tree just before it is rendered\n\t * to the DOM.\n\t *\n\t * Post-fixers are executed right after all changes from the outermost change block were applied but\n\t * before the {@link module:engine/view/view~View#event:render render event} is fired. If a post-fixer callback made\n\t * a change, it should return `true`. When this happens, all post-fixers are fired again to check if something else should\n\t * not be fixed in the new document tree state.\n\t *\n\t * View post-fixers are useful when you want to apply some fixes whenever the view structure changes. Keep in mind that\n\t * changes executed in a view post-fixer should not break model-view mapping.\n\t *\n\t * The types of changes which should be safe:\n\t *\n\t * * adding or removing attribute from elements,\n\t * * changes inside of {@link module:engine/view/uielement~UIElement UI elements},\n\t * * {@link module:engine/model/differ~Differ#refreshItem marking some of the model elements to be re-converted}.\n\t *\n\t * Try to avoid changes which touch view structure:\n\t *\n\t * * you should not add or remove nor wrap or unwrap any view elements,\n\t * * you should not change the editor data model in a view post-fixer.\n\t *\n\t * As a parameter, a post-fixer callback receives a {@link module:engine/view/downcastwriter~DowncastWriter downcast writer}.\n\t *\n\t * Typically, a post-fixer will look like this:\n\t *\n\t *\t\teditor.editing.view.document.registerPostFixer( writer => {\n\t *\t\t\tif ( checkSomeCondition() ) {\n\t *\t\t\t\twriter.doSomething();\n\t *\n\t *\t\t\t\t// Let other post-fixers know that something changed.\n\t *\t\t\t\treturn true;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Note that nothing happens right after you register a post-fixer (e.g. execute such a code in the console).\n\t * That is because adding a post-fixer does not execute it.\n\t * The post-fixer will be executed as soon as any change in the document needs to cause its rendering.\n\t * If you want to re-render the editor's view after registering the post-fixer then you should do it manually by calling\n\t * {@link module:engine/view/view~View#forceRender `view.forceRender()`}.\n\t *\n\t * If you need to register a callback which is executed when DOM elements are already updated,\n\t * use {@link module:engine/view/view~View#event:render render event}.\n\t *\n\t * @param {Function} postFixer\n\t */\n\tregisterPostFixer( postFixer ) {\n\t\tthis._postFixers.add( postFixer );\n\t}\n\n\t/**\n\t * Destroys this instance. Makes sure that all observers are destroyed and listeners removed.\n\t */\n\tdestroy() {\n\t\tthis.roots.map( root => root.destroy() );\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Performs post-fixer loops. Executes post-fixer callbacks as long as none of them has done any changes to the model.\n\t *\n\t * @protected\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\t_callPostFixers( writer ) {\n\t\tlet wasFixed = false;\n\n\t\tdo {\n\t\t\tfor ( const callback of this._postFixers ) {\n\t\t\t\twasFixed = callback( writer );\n\n\t\t\t\tif ( wasFixed ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} while ( wasFixed );\n\t}\n\n\t/**\n\t * Event fired whenever document content layout changes. It is fired whenever content is\n\t * {@link module:engine/view/view~View#event:render rendered}, but should be also fired by observers in case of\n\t * other actions which may change layout, for instance when image loads.\n\t *\n\t * @event layoutChanged\n\t */\n\n\t// @if CK_DEBUG_ENGINE // log( version ) {\n\t// @if CK_DEBUG_ENGINE //\tlogDocument( this, version );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( Document, ObservableMixin );\n\n/**\n * Enum representing type of the change.\n *\n * Possible values:\n *\n * * `children` - for child list changes,\n * * `attributes` - for element attributes changes,\n * * `text` - for text nodes changes.\n *\n * @typedef {String} module:engine/view/document~ChangeType\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/attributeelement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// Default attribute priority.\nconst DEFAULT_PRIORITY = 10;\n\n/**\n * Attribute elements are used to represent formatting elements in the view (think – `<b>`, `<span style=\"font-size: 2em\">`, etc.).\n * Most often they are created when downcasting model text attributes.\n *\n * Editing engine does not define a fixed HTML DTD. This is why a feature developer needs to choose between various\n * types (container element, {@link module:engine/view/attributeelement~AttributeElement attribute element},\n * {@link module:engine/view/emptyelement~EmptyElement empty element}, etc) when developing a feature.\n *\n * To create a new attribute element instance use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createAttributeElement `DowncastWriter#createAttributeElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class AttributeElement extends Element {\n\t/**\n\t * Creates an attribute element.\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createAttributeElement\n\t * @see module:engine/view/element~Element\n\t * @protected\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( name, attrs, children );\n\n\t\t/**\n\t\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {Number|null} Block filler offset or `null` if block filler is not needed.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\n\t\t/**\n\t\t * Element priority. Decides in what order elements are wrapped by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Number}\n\t\t */\n\t\tthis._priority = DEFAULT_PRIORITY;\n\n\t\t/**\n\t\t * Element identifier. If set, it is used by {@link module:engine/view/element~Element#isSimilar},\n\t\t * and then two elements are considered similar if, and only if they have the same `_id`.\n\t\t *\n\t\t * @protected\n\t\t * @member {String|Number}\n\t\t */\n\t\tthis._id = null;\n\n\t\t/**\n\t\t * Keeps all the attribute elements that have the same {@link module:engine/view/attributeelement~AttributeElement#id ids}\n\t\t * and still exist in the view tree.\n\t\t *\n\t\t * This property is managed by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set.<module:engine/view/attributeelement~AttributeElement>|null}\n\t\t */\n\t\tthis._clonesGroup = null;\n\t}\n\n\t/**\n\t * Element priority. Decides in what order elements are wrapped by {@link module:engine/view/downcastwriter~DowncastWriter}.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget priority() {\n\t\treturn this._priority;\n\t}\n\n\t/**\n\t * Element identifier. If set, it is used by {@link module:engine/view/element~Element#isSimilar},\n\t * and then two elements are considered similar if, and only if they have the same `id`.\n\t *\n\t * @readonly\n\t * @type {String|Number}\n\t */\n\tget id() {\n\t\treturn this._id;\n\t}\n\n\t/**\n\t * Returns all {@link module:engine/view/attributeelement~AttributeElement attribute elements} that has the\n\t * same {@link module:engine/view/attributeelement~AttributeElement#id id} and are in the view tree (were not removed).\n\t *\n\t * Note: If this element has been removed from the tree, returned set will not include it.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError attribute-element-get-elements-with-same-id-no-id}\n\t * if this element has no `id`.\n\t *\n\t * @returns {Set.<module:engine/view/attributeelement~AttributeElement>} Set containing all the attribute elements\n\t * with the same `id` that were added and not removed from the view tree.\n\t */\n\tgetElementsWithSameId() {\n\t\tif ( this.id === null ) {\n\t\t\t/**\n\t\t\t * Cannot get elements with the same id for an attribute element without id.\n\t\t\t *\n\t\t\t * @error attribute-element-get-elements-with-same-id-no-id\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'attribute-element-get-elements-with-same-id-no-id: ' +\n\t\t\t\t'Cannot get elements with the same id for an attribute element without id.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\treturn new Set( this._clonesGroup );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tattributeElement.is( 'attributeElement' ); // -> true\n\t *\t\tattributeElement.is( 'element' ); // -> true\n\t *\t\tattributeElement.is( 'node' ); // -> true\n\t *\t\tattributeElement.is( 'view:attributeElement' ); // -> true\n\t *\t\tattributeElement.is( 'view:element' ); // -> true\n\t *\t\tattributeElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tattributeElement.is( 'model:element' ); // -> false\n\t *\t\tattributeElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an attribute element, you can also check its\n\t * {@link module:engine/view/attributeelement~AttributeElement#name name}:\n\t *\n\t *\t\tattributeElement.is( 'b' ); // -> true if this is a bold element\n\t *\t\tattributeElement.is( 'attributeElement', 'b' ); // -> same as above\n\t *\t\ttext.is( 'b' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type && type.replace( /^view:/, '' );\n\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'attributeElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'attributeElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Checks if this element is similar to other element.\n\t *\n\t * If none of elements has set {@link module:engine/view/attributeelement~AttributeElement#id}, then both elements\n\t * should have the same name, attributes and priority to be considered as similar. Two similar elements can contain\n\t * different set of children nodes.\n\t *\n\t * If at least one element has {@link module:engine/view/attributeelement~AttributeElement#id} set, then both\n\t * elements have to have the same {@link module:engine/view/attributeelement~AttributeElement#id} value to be\n\t * considered similar.\n\t *\n\t * Similarity is important for {@link module:engine/view/downcastwriter~DowncastWriter}. For example:\n\t *\n\t * * two following similar elements can be merged together into one, longer element,\n\t * * {@link module:engine/view/downcastwriter~DowncastWriter#unwrap} checks similarity of passed element and processed element to\n\t * decide whether processed element should be unwrapped,\n\t * * etc.\n\t *\n\t * @param {module:engine/view/element~Element} otherElement\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherElement ) {\n\t\t// If any element has an `id` set, just compare the ids.\n\t\tif ( this.id !== null || otherElement.id !== null ) {\n\t\t\treturn this.id === otherElement.id;\n\t\t}\n\n\t\treturn super.isSimilar( otherElement ) && this.priority == otherElement.priority;\n\t}\n\n\t/**\n\t * Clones provided element with priority.\n\t *\n\t * @protected\n\t * @param {Boolean} deep If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/attributeelement~AttributeElement} Clone of this element.\n\t */\n\t_clone( deep ) {\n\t\tconst cloned = super._clone( deep );\n\n\t\t// Clone priority too.\n\t\tcloned._priority = this._priority;\n\n\t\t// And id too.\n\t\tcloned._id = this._id;\n\n\t\treturn cloned;\n\t}\n}\n\n/**\n * Default attribute priority.\n *\n * @member {Number} module:engine/view/attributeelement~AttributeElement.DEFAULT_PRIORITY\n */\nAttributeElement.DEFAULT_PRIORITY = DEFAULT_PRIORITY;\n\n// Returns block {@link module:engine/view/filler~Filler filler} offset or `null` if block filler is not needed.\n//\n// @returns {Number|null} Block filler offset or `null` if block filler is not needed.\nfunction getFillerOffset() {\n\t// <b>foo</b> does not need filler.\n\tif ( nonUiChildrenCount( this ) ) {\n\t\treturn null;\n\t}\n\n\tlet element = this.parent;\n\n\t// <p><b></b></p> needs filler -> <p><b><br></b></p>\n\twhile ( element && element.is( 'attributeElement' ) ) {\n\t\tif ( nonUiChildrenCount( element ) > 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\telement = element.parent;\n\t}\n\n\tif ( !element || nonUiChildrenCount( element ) > 1 ) {\n\t\treturn null;\n\t}\n\n\t// Render block filler at the end of element (after all ui elements).\n\treturn this.childCount;\n}\n\n// Returns total count of children that are not {@link module:engine/view/uielement~UIElement UIElements}.\n//\n// @param {module:engine/view/element~Element} element\n// @returns {Number}\nfunction nonUiChildrenCount( element ) {\n\treturn Array.from( element.getChildren() ).filter( element => !element.is( 'uiElement' ) ).length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/emptyelement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Node from './node';\n\n/**\n * Empty element class. It is used to represent elements that cannot contain any child nodes (for example `<img>` elements).\n *\n * To create a new empty element use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createEmptyElement `downcastWriter#createEmptyElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class EmptyElement extends Element {\n\t/**\n\t * Creates new instance of EmptyElement.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-emptyelement-cannot-add` when third parameter is passed,\n\t * to inform that usage of EmptyElement is incorrect (adding child nodes to EmptyElement is forbidden).\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createEmptyElement\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attributes] Collection of attributes.\n\t */\n\tconstructor( name, attributes, children ) {\n\t\tsuper( name, attributes, children );\n\n\t\t/**\n\t\t * Returns `null` because filler is not needed for EmptyElements.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {null} Always returns null.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\temptyElement.is( 'emptyElement' ); // -> true\n\t *\t\temptyElement.is( 'element' ); // -> true\n\t *\t\temptyElement.is( 'node' ); // -> true\n\t *\t\temptyElement.is( 'view:emptyElement' ); // -> true\n\t *\t\temptyElement.is( 'view:element' ); // -> true\n\t *\t\temptyElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\temptyElement.is( 'model:element' ); // -> false\n\t *\t\temptyElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an empty element, you can also check its\n\t * {@link module:engine/view/emptyelement~EmptyElement#name name}:\n\t *\n\t *\t\temptyElement.is( 'img' ); // -> true if this is a img element\n\t *\t\temptyElement.is( 'emptyElement', 'img' ); // -> same as above\n\t *\t\ttext.is( 'img' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'emptyElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'emptyElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Overrides {@link module:engine/view/element~Element#_insertChild} method.\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-emptyelement-cannot-add` to prevent\n\t * adding any child nodes to EmptyElement.\n\t *\n\t * @protected\n\t */\n\t_insertChild( index, nodes ) {\n\t\tif ( nodes && ( nodes instanceof Node || Array.from( nodes ).length > 0 ) ) {\n\t\t\t/**\n\t\t\t * Cannot add children to {@link module:engine/view/emptyelement~EmptyElement}.\n\t\t\t *\n\t\t\t * @error view-emptyelement-cannot-add\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-emptyelement-cannot-add: Cannot add child nodes to EmptyElement instance.',\n\t\t\t\t[ this, nodes ]\n\t\t\t);\n\t\t}\n\t}\n}\n\n// Returns `null` because block filler is not needed for EmptyElements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals navigator:false */\n\n/**\n * @module utils/env\n */\n\nconst userAgent = navigator.userAgent.toLowerCase();\n\n/**\n * A namespace containing environment and browser information.\n *\n * @namespace\n */\nconst env = {\n\t/**\n\t * Indicates that the application is running on Macintosh.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisMac: isMac( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Microsoft Edge.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisEdge: isEdge( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Firefox (Gecko).\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisGecko: isGecko( userAgent ),\n\n\t/**\n\t * Indicates that the application is running in Safari.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisSafari: isSafari( userAgent ),\n\n\t/**\n\t * Indicates that the application is running on Android mobile device.\n\t *\n\t * @static\n\t * @type {Boolean}\n\t */\n\tisAndroid: isAndroid( userAgent ),\n\n\t/**\n\t * Environment features information.\n\t *\n\t * @memberOf module:utils/env~env\n\t * @namespace\n\t */\n\tfeatures: {\n\t\t/**\n\t\t * Indicates that the environment supports ES2018 Unicode property escapes — like `\\p{P}` or `\\p{L}`.\n\t\t * More information about unicode properties might be found\n\t\t * [in Unicode Standard Annex #44](https://www.unicode.org/reports/tr44/#GC_Values_Table).\n\t\t *\n\t\t * @type {Boolean}\n\t\t */\n\t\tisRegExpUnicodePropertySupported: isRegExpUnicodePropertySupported()\n\t}\n};\n\nexport default env;\n\n/**\n * Checks if User Agent represented by the string is running on Macintosh.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is running on Macintosh or not.\n */\nexport function isMac( userAgent ) {\n\treturn userAgent.indexOf( 'macintosh' ) > -1;\n}\n\n/**\n * Checks if User Agent represented by the string is Microsoft Edge.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Edge or not.\n */\nexport function isEdge( userAgent ) {\n\treturn !!userAgent.match( /edge\\/(\\d+.?\\d*)/ );\n}\n\n/**\n * Checks if User Agent represented by the string is Firefox (Gecko).\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Firefox or not.\n */\nexport function isGecko( userAgent ) {\n\treturn !!userAgent.match( /gecko\\/\\d+/ );\n}\n\n/**\n * Checks if User Agent represented by the string is Safari.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Safari or not.\n */\nexport function isSafari( userAgent ) {\n\treturn userAgent.indexOf( ' applewebkit/' ) > -1 && userAgent.indexOf( 'chrome' ) === -1;\n}\n\n/**\n * Checks if User Agent represented by the string is Android mobile device.\n *\n * @param {String} userAgent **Lowercase** `navigator.userAgent` string.\n * @returns {Boolean} Whether User Agent is Safari or not.\n */\nexport function isAndroid( userAgent ) {\n\treturn userAgent.indexOf( 'android' ) > -1;\n}\n\n/**\n * Checks if the current environment supports ES2018 Unicode properties like `\\p{P}` or `\\p{L}`.\n * More information about unicode properties might be found\n * [in Unicode Standard Annex #44](https://www.unicode.org/reports/tr44/#GC_Values_Table).\n *\n * @returns {Boolean}\n */\nexport function isRegExpUnicodePropertySupported() {\n\tlet isSupported = false;\n\n\t// Feature detection for Unicode properties. Added in ES2018. Currently Firefox and Edge do not support it.\n\t// See https://github.com/ckeditor/ckeditor5-mention/issues/44#issuecomment-487002174.\n\n\ttry {\n\t\t// Usage of regular expression literal cause error during build (ckeditor/ckeditor5-dev#534).\n\t\tisSupported = 'ć'.search( new RegExp( '[\\\\p{L}]', 'u' ) ) === 0;\n\t} catch ( error ) {\n\t\t// Firefox throws a SyntaxError when the group is unsupported.\n\t}\n\n\treturn isSupported;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Set of utils related to keyboard support.\n *\n * @module utils/keyboard\n */\n\nimport CKEditorError from './ckeditorerror';\nimport env from './env';\n\nconst macGlyphsToModifiers = {\n\t'⌘': 'ctrl',\n\t'⇧': 'shift',\n\t'⌥': 'alt'\n};\n\nconst modifiersToMacGlyphs = {\n\t'ctrl': '⌘',\n\t'shift': '⇧',\n\t'alt': '⌥'\n};\n\n/**\n * Object with `keyName => keyCode` pairs for a set of known keys.\n *\n * Contains:\n *\n * * `a-z`,\n * * `0-9`,\n * * `f1-f12`,\n * * `arrow(left|up|right|bottom)`,\n * * `backspace`, `delete`, `enter`, `esc`, `tab`,\n * * `ctrl`, `cmd`, `shift`, `alt`.\n */\nexport const keyCodes = generateKnownKeyCodes();\n\n/**\n * Converts a key name or a {@link module:utils/keyboard~KeystrokeInfo keystroke info} into a key code.\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * @param {String|module:utils/keyboard~KeystrokeInfo} Key name (see {@link module:utils/keyboard~keyCodes})\n * or a keystroke data object.\n * @returns {Number} Key or keystroke code.\n */\nexport function getCode( key ) {\n\tlet keyCode;\n\n\tif ( typeof key == 'string' ) {\n\t\tkeyCode = keyCodes[ key.toLowerCase() ];\n\n\t\tif ( !keyCode ) {\n\t\t\t/**\n\t\t\t * Unknown key name. Only key names contained by the {@link module:utils/keyboard~keyCodes} can be used.\n\t\t\t *\n\t\t\t * @errror keyboard-unknown-key\n\t\t\t * @param {String} key\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'keyboard-unknown-key: Unknown key name.',\n\t\t\t\tnull, { key }\n\t\t\t);\n\t\t}\n\t} else {\n\t\tkeyCode = key.keyCode +\n\t\t\t( key.altKey ? keyCodes.alt : 0 ) +\n\t\t\t( key.ctrlKey ? keyCodes.ctrl : 0 ) +\n\t\t\t( key.shiftKey ? keyCodes.shift : 0 );\n\t}\n\n\treturn keyCode;\n}\n\n/**\n * Parses keystroke and returns a keystroke code that will match the code returned by\n * link {@link module:utils/keyboard.getCode} for a corresponding {@link module:utils/keyboard~KeystrokeInfo keystroke info}.\n *\n * The keystroke can be passed in two formats:\n *\n * * as a single string – e.g. `ctrl + A`,\n * * as an array of {@link module:utils/keyboard~keyCodes known key names} and key codes – e.g.:\n * * `[ 'ctrl', 32 ]` (ctrl + space),\n * * `[ 'ctrl', 'a' ]` (ctrl + A).\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * Note: Only keystrokes with a single non-modifier key are supported (e.g. `ctrl+A` is OK, but `ctrl+A+B` is not).\n *\n * @param {String|Array.<Number|String>} keystroke Keystroke definition.\n * @returns {Number} Keystroke code.\n */\nexport function parseKeystroke( keystroke ) {\n\tif ( typeof keystroke == 'string' ) {\n\t\tkeystroke = splitKeystrokeText( keystroke );\n\t}\n\n\treturn keystroke\n\t\t.map( key => ( typeof key == 'string' ) ? getCode( key ) : key )\n\t\t.reduce( ( key, sum ) => sum + key, 0 );\n}\n\n/**\n * It translates any keystroke string text like `\"CTRL+A\"` to an\n * environment–specific keystroke, i.e. `\"⌘A\"` on Mac OSX.\n *\n * @param {String} keystroke Keystroke text.\n * @returns {String} Keystroke text specific for the environment.\n */\nexport function getEnvKeystrokeText( keystroke ) {\n\tif ( !env.isMac ) {\n\t\treturn keystroke;\n\t}\n\n\treturn splitKeystrokeText( keystroke )\n\t\t// Replace modifiers (e.g. \"ctrl\") with Mac glyphs (e.g. \"⌘\") first.\n\t\t.map( key => modifiersToMacGlyphs[ key.toLowerCase() ] || key )\n\n\t\t// Decide whether to put \"+\" between keys in the keystroke or not.\n\t\t.reduce( ( value, key ) => {\n\t\t\tif ( value.slice( -1 ) in macGlyphsToModifiers ) {\n\t\t\t\treturn value + key;\n\t\t\t} else {\n\t\t\t\treturn value + '+' + key;\n\t\t\t}\n\t\t} );\n}\n\nfunction generateKnownKeyCodes() {\n\tconst keyCodes = {\n\t\tarrowleft: 37,\n\t\tarrowup: 38,\n\t\tarrowright: 39,\n\t\tarrowdown: 40,\n\t\tbackspace: 8,\n\t\tdelete: 46,\n\t\tenter: 13,\n\t\tspace: 32,\n\t\tesc: 27,\n\t\ttab: 9,\n\n\t\t// The idea about these numbers is that they do not collide with any real key codes, so we can use them\n\t\t// like bit masks.\n\t\tctrl: 0x110000,\n\t\t// Has the same code as ctrl, because their behaviour should be unified across the editor.\n\t\t// See http://ckeditor.github.io/editor-recommendations/general-policies#ctrl-vs-cmd\n\t\tcmd: 0x110000,\n\t\tshift: 0x220000,\n\t\talt: 0x440000\n\t};\n\n\t// a-z\n\tfor ( let code = 65; code <= 90; code++ ) {\n\t\tconst letter = String.fromCharCode( code );\n\n\t\tkeyCodes[ letter.toLowerCase() ] = code;\n\t}\n\n\t// 0-9\n\tfor ( let code = 48; code <= 57; code++ ) {\n\t\tkeyCodes[ code - 48 ] = code;\n\t}\n\n\t// F1-F12\n\tfor ( let code = 112; code <= 123; code++ ) {\n\t\tkeyCodes[ 'f' + ( code - 111 ) ] = code;\n\t}\n\n\treturn keyCodes;\n}\n\nfunction splitKeystrokeText( keystroke ) {\n\treturn keystroke.split( /\\s*\\+\\s*/ );\n}\n\n/**\n * Information about a keystroke.\n *\n * @interface module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * The [key code](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode).\n *\n * @member {Number} module:utils/keyboard~KeystrokeInfo#keyCode\n */\n\n/**\n * Whether the <kbd>Alt</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#altKey\n */\n\n/**\n * Whether the <kbd>Ctrl</kbd> or <kbd>Cmd</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#ctrlKey\n */\n\n/**\n * Whether the <kbd>Shift</kbd> modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#shiftKey\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/uielement\n */\n\nimport Element from './element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Node from './node';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * UI element class. It should be used to represent editing UI which needs to be injected into the editing view\n * If possible, you should keep your UI outside the editing view. However, if that is not possible,\n * UI elements can be used.\n *\n * How a UI element is rendered is in your control (you pass a callback to\n * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`}).\n * The editor will ignore your UI element – the selection cannot be placed in it, it is skipped (invisible) when\n * the user modifies the selection by using arrow keys and the editor does not listen to any mutations which\n * happen inside your UI elements.\n *\n * The limitation is that you cannot convert a model element to a UI element. UI elements need to be\n * created for {@link module:engine/model/markercollection~Marker markers} or as additinal elements\n * inside normal {@link module:engine/view/containerelement~ContainerElement container elements}.\n *\n * To create a new UI element use the\n * {@link module:engine/view/downcastwriter~DowncastWriter#createUIElement `downcastWriter#createUIElement()`} method.\n *\n * @extends module:engine/view/element~Element\n */\nexport default class UIElement extends Element {\n\t/**\n\t * Creates new instance of UIElement.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-uielement-cannot-add` when third parameter is passed,\n\t * to inform that usage of UIElement is incorrect (adding child nodes to UIElement is forbidden).\n\t *\n\t * @see module:engine/view/downcastwriter~DowncastWriter#createUIElement\n\t * @protected\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attributes] Collection of attributes.\n\t */\n\tconstructor( name, attributes, children ) {\n\t\tsuper( name, attributes, children );\n\n\t\t/**\n\t\t * Returns `null` because filler is not needed for UIElements.\n\t\t *\n\t\t * @method #getFillerOffset\n\t\t * @returns {null} Always returns null.\n\t\t */\n\t\tthis.getFillerOffset = getFillerOffset;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tuiElement.is( 'uiElement' ); // -> true\n\t *\t\tuiElement.is( 'element' ); // -> true\n\t *\t\tuiElement.is( 'node' ); // -> true\n\t *\t\tuiElement.is( 'view:uiElement' ); // -> true\n\t *\t\tuiElement.is( 'view:element' ); // -> true\n\t *\t\tuiElement.is( 'view:node' ); // -> true\n\t *\n\t *\t\tuiElement.is( 'model:element' ); // -> false\n\t *\t\tuiElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an ui element, you can also check its\n\t * {@link module:engine/view/uielement~UIElement#name name}:\n\t *\n\t *\t\tuiElement.is( 'span' ); // -> true if this is a span ui element\n\t *\t\tuiElement.is( 'uiElement', 'span' ); // -> same as above\n\t *\t\ttext.is( 'span' ); -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^view:/, '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'uiElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'uiElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Overrides {@link module:engine/view/element~Element#_insertChild} method.\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-uielement-cannot-add` to prevent adding any child nodes\n\t * to UIElement.\n\t *\n\t * @protected\n\t */\n\t_insertChild( index, nodes ) {\n\t\tif ( nodes && ( nodes instanceof Node || Array.from( nodes ).length > 0 ) ) {\n\t\t\t/**\n\t\t\t * Cannot add children to {@link module:engine/view/uielement~UIElement}.\n\t\t\t *\n\t\t\t * @error view-uielement-cannot-add\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-uielement-cannot-add: Cannot add child nodes to UIElement instance.', this );\n\t\t}\n\t}\n\n\t/**\n\t * Renders this {@link module:engine/view/uielement~UIElement} to DOM. This method is called by\n\t * {@link module:engine/view/domconverter~DomConverter}.\n\t * Do not use inheritance to create custom rendering method, replace `render()` method instead:\n\t *\n\t *\t\tconst myUIElement = downcastWriter.createUIElement( 'span' );\n\t *\t\tmyUIElement.render = function( domDocument ) {\n\t *\t\t\tconst domElement = this.toDomElement( domDocument );\n\t *\t\t\tdomElement.innerHTML = '<b>this is ui element</b>';\n\t *\n\t *\t\t\treturn domElement;\n\t *\t\t};\n\t *\n\t * @param {Document} domDocument\n\t * @returns {HTMLElement}\n\t */\n\trender( domDocument ) {\n\t\treturn this.toDomElement( domDocument );\n\t}\n\n\t/**\n\t * Creates DOM element based on this view UIElement.\n\t * Note that each time this method is called new DOM element is created.\n\t *\n\t * @param {Document} domDocument\n\t * @returns {HTMLElement}\n\t */\n\ttoDomElement( domDocument ) {\n\t\tconst domElement = domDocument.createElement( this.name );\n\n\t\tfor ( const key of this.getAttributeKeys() ) {\n\t\t\tdomElement.setAttribute( key, this.getAttribute( key ) );\n\t\t}\n\n\t\treturn domElement;\n\t}\n}\n\n/**\n * This function injects UI element handling to the given {@link module:engine/view/document~Document document}.\n *\n * A callback is added to {@link module:engine/view/document~Document#event:keydown document keydown event}.\n * The callback handles the situation when right arrow key is pressed and selection is collapsed before a UI element.\n * Without this handler, it would be impossible to \"jump over\" UI element using right arrow key.\n *\n * @param {module:engine/view/view~View} view View controller to which the quirks handling will be injected.\n */\nexport function injectUiElementHandling( view ) {\n\tview.document.on( 'keydown', ( evt, data ) => jumpOverUiElement( evt, data, view.domConverter ) );\n}\n\n// Returns `null` because block filler is not needed for UIElements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n\n// Selection cannot be placed in a `UIElement`. Whenever it is placed there, it is moved before it. This\n// causes a situation when it is impossible to jump over `UIElement` using right arrow key, because the selection\n// ends up in ui element (in DOM) and is moved back to the left. This handler fixes this situation.\nfunction jumpOverUiElement( evt, data, domConverter ) {\n\tif ( data.keyCode == keyCodes.arrowright ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\t\tconst domSelectionCollapsed = domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed;\n\n\t\t// Jump over UI element if selection is collapsed or shift key is pressed. These are the cases when selection would extend.\n\t\tif ( domSelectionCollapsed || data.shiftKey ) {\n\t\t\tconst domParent = domSelection.focusNode;\n\t\t\tconst domOffset = domSelection.focusOffset;\n\n\t\t\tconst viewPosition = domConverter.domPositionToView( domParent, domOffset );\n\n\t\t\t// In case if dom element is not converted to view or is not mapped or something. Happens for example in some tests.\n\t\t\tif ( viewPosition === null ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip all following ui elements.\n\t\t\tlet jumpedOverAnyUiElement = false;\n\n\t\t\tconst nextViewPosition = viewPosition.getLastMatchingPosition( value => {\n\t\t\t\tif ( value.item.is( 'uiElement' ) ) {\n\t\t\t\t\t// Remember that there was at least one ui element.\n\t\t\t\t\tjumpedOverAnyUiElement = true;\n\t\t\t\t}\n\n\t\t\t\t// Jump over ui elements, jump over empty attribute elements, move up from inside of attribute element.\n\t\t\t\tif ( value.item.is( 'uiElement' ) || value.item.is( 'attributeElement' ) ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\t// Don't jump over text or don't get out of container element.\n\t\t\t\treturn false;\n\t\t\t} );\n\n\t\t\t// If anything has been skipped, fix position.\n\t\t\t// This `if` could be possibly omitted but maybe it is better not to mess with DOM selection if not needed.\n\t\t\tif ( jumpedOverAnyUiElement ) {\n\t\t\t\tconst newDomPosition = domConverter.viewPositionToDom( nextViewPosition );\n\n\t\t\t\tif ( domSelectionCollapsed ) {\n\t\t\t\t\t// Selection was collapsed, so collapse it at further position.\n\t\t\t\t\tdomSelection.collapse( newDomPosition.parent, newDomPosition.offset );\n\t\t\t\t} else {\n\t\t\t\t\t// Selection was not collapse, so extend it instead of collapsing.\n\t\t\t\t\tdomSelection.extend( newDomPosition.parent, newDomPosition.offset );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/documentfragment\n */\n\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\n/**\n * Document fragment.\n *\n * To create a new document fragment instance use the\n * {@link module:engine/view/upcastwriter~UpcastWriter#createDocumentFragment `UpcastWriter#createDocumentFragment()`}\n * method.\n */\nexport default class DocumentFragment {\n\t/**\n\t * Creates new DocumentFragment instance.\n\t *\n\t * @protected\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into the created document fragment.\n\t */\n\tconstructor( children ) {\n\t\t/**\n\t\t * Array of child nodes.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/view/element~Element>} module:engine/view/documentfragment~DocumentFragment#_children\n\t\t */\n\t\tthis._children = [];\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over nodes added to this document fragment.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Number of child nodes in this document fragment.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this document fragment, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Artificial root of `DocumentFragment`. Returns itself. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Artificial parent of `DocumentFragment`. Returns `null`. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {null}\n\t */\n\tget parent() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocFrag.is( 'documentFragment' ); // -> true\n\t *\t\tdocFrag.is( 'view:documentFragment' ); // -> true\n\t *\n\t *\t\tdocFrag.is( 'model:documentFragment' ); // -> false\n\t *\t\tdocFrag.is( 'element' ); // -> false\n\t *\t\tdocFrag.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/view/node~Node#is Check the entire list of view objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'documentFragment' || type == 'view:documentFragment';\n\t}\n\n\t/**\n\t * {@link module:engine/view/documentfragment~DocumentFragment#_insertChild Insert} a child node or a list of child nodes at the end\n\t * and sets the parent of these nodes to this fragment.\n\t *\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @returns {Number} Number of appended nodes.\n\t */\n\t_appendChild( items ) {\n\t\treturn this._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Gets child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/view/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children[ index ];\n\t}\n\n\t/**\n\t * Gets index of the given child node. Returns `-1` if child node is not found.\n\t *\n\t * @param {module:engine/view/node~Node} node Child node.\n\t * @returns {Number} Index of the child node.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.indexOf( node );\n\t}\n\n\t/**\n\t * Gets child nodes iterator.\n\t *\n\t * @returns {Iterable.<module:engine/view/node~Node>} Child nodes iterator.\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this fragment.\n\t *\n\t * @param {Number} index Position where nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\t_insertChild( index, items ) {\n\t\tthis._fireChange( 'children', this );\n\t\tlet count = 0;\n\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\n\t\t\tthis._children.splice( index, 0, node );\n\t\t\tindex++;\n\t\t\tcount++;\n\t\t}\n\n\t\treturn count;\n\t}\n\n\t/**\n\t * Removes number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @param {Number} index Number of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/view/node~Node>} The array of removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tthis._fireChange( 'children', this );\n\n\t\tfor ( let i = index; i < index + howMany; i++ ) {\n\t\t\tthis._children[ i ].parent = null;\n\t\t}\n\n\t\treturn this._children.splice( index, howMany );\n\t}\n\n\t/**\n\t * Fires `change` event with given type of the change.\n\t *\n\t * @private\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Changed node.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\t_fireChange( type, node ) {\n\t\tthis.fire( 'change:' + type, node );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // printTree() {\n\t// @if CK_DEBUG_ENGINE //\tlet string = 'ViewDocumentFragment: [';\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + '\\t'.repeat( 1 ) + child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\n' + child.printTree( 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\n]';\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( DocumentFragment, EmitterMixin );\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/view/item~Item|Iterable.<String|module:engine/view/item~Item>}\n// @returns {Iterable.<module:engine/view/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/view/downcastwriter\n */\n\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\nimport ContainerElement from './containerelement';\nimport AttributeElement from './attributeelement';\nimport EmptyElement from './emptyelement';\nimport UIElement from './uielement';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport DocumentFragment from './documentfragment';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport Text from './text';\nimport EditableElement from './editableelement';\nimport { isPlainObject } from 'lodash-es';\n\n/**\n * View downcast writer.\n *\n * It provides a set of methods used to manipulate view nodes.\n *\n * Do not create an instance of this writer manually. To modify a view structure, use\n * the {@link module:engine/view/view~View#change `View#change()`} block.\n *\n * The `DowncastWriter` is designed to work with semantic views which are the views that were/are being downcasted from the model.\n * To work with ordinary views (e.g. parsed from a pasted content) use the\n * {@link module:engine/view/upcastwriter~UpcastWriter upcast writer}.\n *\n * Read more about changing the view in the {@glink framework/guides/architecture/editing-engine#changing-the-view Changing the view}\n * section of the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide.\n */\nexport default class DowncastWriter {\n\tconstructor( document ) {\n\t\t/**\n\t\t * @readonly\n\t\t * @type {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = document;\n\n\t\t/**\n\t\t * Holds references to the attribute groups that share the same {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t\t * The keys are `id`s, the values are `Set`s holding {@link module:engine/view/attributeelement~AttributeElement}s.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<String,Set>}\n\t\t */\n\t\tthis._cloneGroups = new Map();\n\t}\n\n\t/**\n\t * Sets {@link module:engine/view/documentselection~DocumentSelection selection's} ranges and direction to the\n\t * specified location based on the given {@link module:engine/view/selection~Selectable selectable}.\n\t *\n\t * Usage:\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets backward selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( start2, end2 ) ];\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\twriter.setSelection( otherSelection );\n\t *\n\t * \t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\twriter.setSelection( position );\n\t *\n\t * \t\t// Sets collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'p' );\n\t *\t\twriter.setSelection( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t * \t\twriter.setSelection( paragraph, 'in' );\n\t *\n\t * Creates a range on the {@link module:engine/view/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'on' );\n\t *\n\t * \t\t// Removes all ranges.\n\t *\t\twriter.setSelection( null );\n\t *\n\t * `DowncastWriter#setSelection()` allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\twriter.setSelection( range, { backward: true } );\n\t *\n\t *\t\t// Sets selection as fake.\n\t *\t\t// Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * \t\t// This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * \t\t// represented in other way, for example by applying proper CSS class.\n\t *\t\twriter.setSelection( range, { fake: true } );\n\t *\n\t * \t\t// Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * \t\t// (and be properly handled by screen readers).\n\t *\t\twriter.setSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t */\n\tsetSelection( selectable, placeOrOffset, options ) {\n\t\tthis.document.selection._setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/view/documentselection~DocumentSelection#focus selection's focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as {@link module:engine/view/view~View#createPositionAt view.createPositionAt()}\n\t * parameters.\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/view/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tsetSelectionFocus( itemOrPosition, offset ) {\n\t\tthis.document.selection._setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/text~Text text node}.\n\t *\n\t *\t\twriter.createText( 'foo' );\n\t *\n\t * @param {String} data The text's data.\n\t * @returns {module:engine/view/text~Text} The created text node.\n\t */\n\tcreateText( data ) {\n\t\treturn new Text( data );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/attributeelement~AttributeElement}.\n\t *\n\t *\t\twriter.createAttributeElement( 'strong' );\n\t *\t\twriter.createAttributeElement( 'a', { href: 'foo.bar' } );\n\t *\n\t *\t\t// Make `<a>` element contain other attributes element so the `<a>` element is not broken.\n\t *\t\twriter.createAttributeElement( 'a', { href: 'foo.bar' }, { priority: 5 } );\n\t *\n\t *\t\t// Set `id` of a marker element so it is not joined or merged with \"normal\" elements.\n\t *\t\twriter.createAttributeElement( 'span', { class: 'my-marker' }, { id: 'marker:my' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Element's attributes.\n\t * @param {Object} [options] Element's options.\n\t * @param {Number} [options.priority] Element's {@link module:engine/view/attributeelement~AttributeElement#priority priority}.\n\t * @param {Number|String} [options.id] Element's {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t * @returns {module:engine/view/attributeelement~AttributeElement} Created element.\n\t */\n\tcreateAttributeElement( name, attributes, options = {} ) {\n\t\tconst attributeElement = new AttributeElement( name, attributes );\n\n\t\tif ( options.priority ) {\n\t\t\tattributeElement._priority = options.priority;\n\t\t}\n\n\t\tif ( options.id ) {\n\t\t\tattributeElement._id = options.id;\n\t\t}\n\n\t\treturn attributeElement;\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/containerelement~ContainerElement}.\n\t *\n\t *\t\twriter.createContainerElement( 'p' );\n\t *\n\t *\t\t// Create element with custom attributes.\n\t *\t\twriter.createContainerElement( 'div', { id: 'foo-bar', 'data-baz': '123' } );\n\t *\n\t *\t\t// Create element with custom styles.\n\t *\t\twriter.createContainerElement( 'p', { style: 'font-weight: bold; padding-bottom: 10px' } );\n\t *\n\t *\t\t// Create element with custom classes.\n\t *\t\twriter.createContainerElement( 'p', { class: 'foo bar baz' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/containerelement~ContainerElement} Created element.\n\t */\n\tcreateContainerElement( name, attributes ) {\n\t\treturn new ContainerElement( name, attributes );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t *\t\twriter.createEditableElement( 'div' );\n\t *\t\twriter.createEditableElement( 'div', { id: 'foo-1234' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/editableelement~EditableElement} Created element.\n\t */\n\tcreateEditableElement( name, attributes ) {\n\t\tconst editableElement = new EditableElement( name, attributes );\n\t\teditableElement._document = this.document;\n\n\t\treturn editableElement;\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/emptyelement~EmptyElement}.\n\t *\n\t *\t\twriter.createEmptyElement( 'img' );\n\t *\t\twriter.createEmptyElement( 'img', { id: 'foo-1234' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/view/emptyelement~EmptyElement} Created element.\n\t */\n\tcreateEmptyElement( name, attributes ) {\n\t\treturn new EmptyElement( name, attributes );\n\t}\n\n\t/**\n\t * Creates new {@link module:engine/view/uielement~UIElement}.\n\t *\n\t *\t\twriter.createUIElement( 'span' );\n\t *\t\twriter.createUIElement( 'span', { id: 'foo-1234' } );\n\t *\n\t * Custom render function can be provided as third parameter:\n\t *\n\t *\t\twriter.createUIElement( 'span', null, function( domDocument ) {\n\t *\t\t\tconst domElement = this.toDomElement( domDocument );\n\t *\t\t\tdomElement.innerHTML = '<b>this is ui element</b>';\n\t *\n\t *\t\t\treturn domElement;\n\t *\t\t} );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {Function} [renderFunction] Custom render function.\n\t * @returns {module:engine/view/uielement~UIElement} Created element.\n\t */\n\tcreateUIElement( name, attributes, renderFunction ) {\n\t\tconst uiElement = new UIElement( name, attributes );\n\n\t\tif ( renderFunction ) {\n\t\t\tuiElement.render = renderFunction;\n\t\t}\n\n\t\treturn uiElement;\n\t}\n\n\t/**\n\t * Adds or overwrite element's attribute with a specified key and value.\n\t *\n\t *\t\twriter.setAttribute( 'href', 'http://ckeditor.com', linkElement );\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tsetAttribute( key, value, element ) {\n\t\telement._setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t *\t\twriter.removeAttribute( 'href', linkElement );\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveAttribute( key, element ) {\n\t\telement._removeAttribute( key );\n\t}\n\n\t/**\n\t * Adds specified class to the element.\n\t *\n\t *\t\twriter.addClass( 'foo', linkElement );\n\t *\t\twriter.addClass( [ 'foo', 'bar' ], linkElement );\n\t *\n\t * @param {Array.<String>|String} className\n\t * @param {module:engine/view/element~Element} element\n\t */\n\taddClass( className, element ) {\n\t\telement._addClass( className );\n\t}\n\n\t/**\n\t * Removes specified class from the element.\n\t *\n\t *\t\twriter.removeClass( 'foo', linkElement );\n\t *\t\twriter.removeClass( [ 'foo', 'bar' ], linkElement );\n\t *\n\t * @param {Array.<String>|String} className\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveClass( className, element ) {\n\t\telement._removeClass( className );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\twriter.setStyle( 'color', 'red', element );\n\t *\t\twriter.setStyle( {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t}, element );\n\t *\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @param {module:engine/view/element~Element} element Element to set styles on.\n\t */\n\tsetStyle( property, value, element ) {\n\t\tif ( isPlainObject( property ) && element === undefined ) {\n\t\t\telement = value;\n\t\t}\n\n\t\telement._setStyle( property, value );\n\t}\n\n\t/**\n\t * Removes specified style from the element.\n\t *\n\t *\t\twriter.removeStyle( 'color', element ); // Removes 'color' style.\n\t *\t\twriter.removeStyle( [ 'color', 'border-top' ], element ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @param {Array.<String>|String} property\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tremoveStyle( property, element ) {\n\t\telement._removeStyle( property );\n\t}\n\n\t/**\n\t * Sets a custom property on element. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @param {String|Symbol} key\n\t * @param {*} value\n\t * @param {module:engine/view/element~Element} element\n\t */\n\tsetCustomProperty( key, value, element ) {\n\t\telement._setCustomProperty( key, value );\n\t}\n\n\t/**\n\t * Removes a custom property stored under the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @param {module:engine/view/element~Element} element\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\tremoveCustomProperty( key, element ) {\n\t\treturn element._removeCustomProperty( key );\n\t}\n\n\t/**\n\t * Breaks attribute nodes at provided position or at boundaries of provided range. It breaks attribute elements inside\n\t * up to a container element.\n\t *\n\t * In following examples `<p>` is a container, `<b>` and `<u>` are attribute nodes:\n\t *\n\t *\t\t<p>foo<b><u>bar{}</u></b></p> -> <p>foo<b><u>bar</u></b>[]</p>\n\t *\t\t<p>foo<b><u>{}bar</u></b></p> -> <p>foo{}<b><u>bar</u></b></p>\n\t *\t\t<p>foo<b><u>b{}ar</u></b></p> -> <p>foo<b><u>b</u></b>[]<b><u>ar</u></b></p>\n\t *\t\t<p><b>fo{o</b><u>ba}r</u></p> -> <p><b>fo</b><b>o</b><u>ba</u><u>r</u></b></p>\n\t *\n\t * **Note:** {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes breakAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakContainer breakContainer} is that `breakAttributes` breaks all\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`,\n\t * up to the first encountered {@link module:engine/view/containerelement~ContainerElement container element}.\n\t * `breakContainer` assumes that given `position` is directly in container element and breaks that container element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container`\n\t * when {@link module:engine/view/range~Range#start start}\n\t * and {@link module:engine/view/range~Range#end end} positions of a passed range are not placed inside same parent container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element`\n\t * when trying to break attributes\n\t * inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element`\n\t * when trying to break attributes\n\t * inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#breakContainer\n\t * @param {module:engine/view/position~Position|module:engine/view/range~Range} positionOrRange Position where\n\t * to break attribute elements.\n\t * @returns {module:engine/view/position~Position|module:engine/view/range~Range} New position or range, after breaking the attribute\n\t * elements.\n\t */\n\tbreakAttributes( positionOrRange ) {\n\t\tif ( positionOrRange instanceof Position ) {\n\t\t\treturn this._breakAttributes( positionOrRange );\n\t\t} else {\n\t\t\treturn this._breakAttributesRange( positionOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Breaks {@link module:engine/view/containerelement~ContainerElement container view element} into two, at the given position. Position\n\t * has to be directly inside container element and cannot be in root. Does not break if position is at the beginning\n\t * or at the end of it's parent element.\n\t *\n\t *\t\t<p>foo^bar</p> -> <p>foo</p><p>bar</p>\n\t *\t\t<div><p>foo</p>^<p>bar</p></div> -> <div><p>foo</p></div><div><p>bar</p></div>\n\t *\t\t<p>^foobar</p> -> ^<p>foobar</p>\n\t *\t\t<p>foobar^</p> -> <p>foobar</p>^\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#breakAttributes breakAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#breakContainer breakContainer} is that `breakAttributes` breaks all\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`,\n\t * up to the first encountered {@link module:engine/view/containerelement~ContainerElement container element}.\n\t * `breakContainer` assumes that given `position` is directly in container element and breaks that container element.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#breakAttributes\n\t * @param {module:engine/view/position~Position} position Position where to break element.\n\t * @returns {module:engine/view/position~Position} Position between broken elements. If element has not been broken,\n\t * the returned position is placed either before it or after it.\n\t */\n\tbreakContainer( position ) {\n\t\tconst element = position.parent;\n\n\t\tif ( !( element.is( 'containerElement' ) ) ) {\n\t\t\t/**\n\t\t\t * Trying to break an element which is not a container element.\n\t\t\t *\n\t\t\t * @error view-writer-break-non-container-element\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'view-writer-break-non-container-element: Trying to break an element which is not a container element.',\n\t\t\t\tthis.document\n\t\t\t);\n\t\t}\n\n\t\tif ( !element.parent ) {\n\t\t\t/**\n\t\t\t * Trying to break root element.\n\t\t\t *\n\t\t\t * @error view-writer-break-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-break-root: Trying to break root element.', this.document );\n\t\t}\n\n\t\tif ( position.isAtStart ) {\n\t\t\treturn Position._createBefore( element );\n\t\t} else if ( !position.isAtEnd ) {\n\t\t\tconst newElement = element._clone( false );\n\n\t\t\tthis.insert( Position._createAfter( element ), newElement );\n\n\t\t\tconst sourceRange = new Range( position, Position._createAt( element, 'end' ) );\n\t\t\tconst targetPosition = new Position( newElement, 0 );\n\n\t\t\tthis.move( sourceRange, targetPosition );\n\t\t}\n\n\t\treturn Position._createAfter( element );\n\t}\n\n\t/**\n\t * Merges {@link module:engine/view/attributeelement~AttributeElement attribute elements}. It also merges text nodes if needed.\n\t * Only {@link module:engine/view/attributeelement~AttributeElement#isSimilar similar} attribute elements can be merged.\n\t *\n\t * In following examples `<p>` is a container and `<b>` is an attribute element:\n\t *\n\t *\t\t<p>foo[]bar</p> -> <p>foo{}bar</p>\n\t *\t\t<p><b>foo</b>[]<b>bar</b></p> -> <p><b>foo{}bar</b></p>\n\t *\t\t<p><b foo=\"bar\">a</b>[]<b foo=\"baz\">b</b></p> -> <p><b foo=\"bar\">a</b>[]<b foo=\"baz\">b</b></p>\n\t *\n\t * It will also take care about empty attributes when merging:\n\t *\n\t *\t\t<p><b>[]</b></p> -> <p>[]</p>\n\t *\t\t<p><b>foo</b><i>[]</i><b>bar</b></p> -> <p><b>foo{}bar</b></p>\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#mergeAttributes mergeAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n\t * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#mergeContainers\n\t * @param {module:engine/view/position~Position} position Merge position.\n\t * @returns {module:engine/view/position~Position} Position after merge.\n\t */\n\tmergeAttributes( position ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// When inside text node - nothing to merge.\n\t\tif ( positionParent.is( 'text' ) ) {\n\t\t\treturn position;\n\t\t}\n\n\t\t// When inside empty attribute - remove it.\n\t\tif ( positionParent.is( 'attributeElement' ) && positionParent.childCount === 0 ) {\n\t\t\tconst parent = positionParent.parent;\n\t\t\tconst offset = positionParent.index;\n\n\t\t\tpositionParent._remove();\n\t\t\tthis._removeFromClonedElementsGroup( positionParent );\n\n\t\t\treturn this.mergeAttributes( new Position( parent, offset ) );\n\t\t}\n\n\t\tconst nodeBefore = positionParent.getChild( positionOffset - 1 );\n\t\tconst nodeAfter = positionParent.getChild( positionOffset );\n\n\t\t// Position should be placed between two nodes.\n\t\tif ( !nodeBefore || !nodeAfter ) {\n\t\t\treturn position;\n\t\t}\n\n\t\t// When position is between two text nodes.\n\t\tif ( nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\t\t// When position is between two same attribute elements.\n\t\telse if ( nodeBefore.is( 'attributeElement' ) && nodeAfter.is( 'attributeElement' ) && nodeBefore.isSimilar( nodeAfter ) ) {\n\t\t\t// Move all children nodes from node placed after selection and remove that node.\n\t\t\tconst count = nodeBefore.childCount;\n\t\t\tnodeBefore._appendChild( nodeAfter.getChildren() );\n\n\t\t\tnodeAfter._remove();\n\t\t\tthis._removeFromClonedElementsGroup( nodeAfter );\n\n\t\t\t// New position is located inside the first node, before new nodes.\n\t\t\t// Call this method recursively to merge again if needed.\n\t\t\treturn this.mergeAttributes( new Position( nodeBefore, count ) );\n\t\t}\n\n\t\treturn position;\n\t}\n\n\t/**\n\t * Merges two {@link module:engine/view/containerelement~ContainerElement container elements} that are before and after given position.\n\t * Precisely, the element after the position is removed and it's contents are moved to element before the position.\n\t *\n\t *\t\t<p>foo</p>^<p>bar</p> -> <p>foo^bar</p>\n\t *\t\t<div>foo</div>^<p>bar</p> -> <div>foo^bar</div>\n\t *\n\t * **Note:** Difference between {@link module:engine/view/downcastwriter~DowncastWriter#mergeAttributes mergeAttributes} and\n\t * {@link module:engine/view/downcastwriter~DowncastWriter#mergeContainers mergeContainers} is that `mergeAttributes` merges two\n\t * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n\t * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n\t *\n\t * @see module:engine/view/attributeelement~AttributeElement\n\t * @see module:engine/view/containerelement~ContainerElement\n\t * @see module:engine/view/downcastwriter~DowncastWriter#mergeAttributes\n\t * @param {module:engine/view/position~Position} position Merge position.\n\t * @returns {module:engine/view/position~Position} Position after merge.\n\t */\n\tmergeContainers( position ) {\n\t\tconst prev = position.nodeBefore;\n\t\tconst next = position.nodeAfter;\n\n\t\tif ( !prev || !next || !prev.is( 'containerElement' ) || !next.is( 'containerElement' ) ) {\n\t\t\t/**\n\t\t\t * Element before and after given position cannot be merged.\n\t\t\t *\n\t\t\t * @error view-writer-merge-containers-invalid-position\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-merge-containers-invalid-position: ' +\n\t\t\t\t'Element before and after given position cannot be merged.', this.document );\n\t\t}\n\n\t\tconst lastChild = prev.getChild( prev.childCount - 1 );\n\t\tconst newPosition = lastChild instanceof Text ? Position._createAt( lastChild, 'end' ) : Position._createAt( prev, 'end' );\n\n\t\tthis.move( Range._createIn( next ), Position._createAt( prev, 'end' ) );\n\t\tthis.remove( Range._createOn( next ) );\n\n\t\treturn newPosition;\n\t}\n\n\t/**\n\t * Insert node or nodes at specified position. Takes care about breaking attributes before insertion\n\t * and merging them afterwards.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n\t * contains instances that are not {@link module:engine/view/text~Text Texts},\n\t * {@link module:engine/view/attributeelement~AttributeElement AttributeElements},\n\t * {@link module:engine/view/containerelement~ContainerElement ContainerElements},\n\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElements} or\n\t * {@link module:engine/view/uielement~UIElement UIElements}.\n\t *\n\t * @param {module:engine/view/position~Position} position Insertion position.\n\t * @param {module:engine/view/text~Text|module:engine/view/attributeelement~AttributeElement|\n\t * module:engine/view/containerelement~ContainerElement|module:engine/view/emptyelement~EmptyElement|\n\t * module:engine/view/uielement~UIElement|Iterable.<module:engine/view/text~Text|\n\t * module:engine/view/attributeelement~AttributeElement|module:engine/view/containerelement~ContainerElement|\n\t * module:engine/view/emptyelement~EmptyElement|module:engine/view/uielement~UIElement>} nodes Node or nodes to insert.\n\t * @returns {module:engine/view/range~Range} Range around inserted nodes.\n\t */\n\tinsert( position, nodes ) {\n\t\tnodes = isIterable( nodes ) ? [ ...nodes ] : [ nodes ];\n\n\t\t// Check if nodes to insert are instances of AttributeElements, ContainerElements, EmptyElements, UIElements or Text.\n\t\tvalidateNodesToInsert( nodes, this.document );\n\n\t\tconst container = getParentContainer( position );\n\n\t\tif ( !container ) {\n\t\t\t/**\n\t\t\t * Position's parent container cannot be found.\n\t\t\t *\n\t\t\t * @error view-writer-invalid-position-container\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-invalid-position-container', this.document );\n\t\t}\n\n\t\tconst insertionPosition = this._breakAttributes( position, true );\n\t\tconst length = container._insertChild( insertionPosition.offset, nodes );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tthis._addToClonedElementsGroup( node );\n\t\t}\n\n\t\tconst endPosition = insertionPosition.getShiftedBy( length );\n\t\tconst start = this.mergeAttributes( insertionPosition );\n\n\t\t// When no nodes were inserted - return collapsed range.\n\t\tif ( length === 0 ) {\n\t\t\treturn new Range( start, start );\n\t\t} else {\n\t\t\t// If start position was merged - move end position.\n\t\t\tif ( !start.isEqual( insertionPosition ) ) {\n\t\t\t\tendPosition.offset--;\n\t\t\t}\n\n\t\t\tconst end = this.mergeAttributes( endPosition );\n\n\t\t\treturn new Range( start, end );\n\t\t}\n\t}\n\n\t/**\n\t * Removes provided range from the container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range|module:engine/view/item~Item} rangeOrItem Range to remove from container\n\t * or an {@link module:engine/view/item~Item item} to remove. If range is provided, after removing, it will be updated\n\t * to a collapsed range showing the new position.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} Document fragment containing removed nodes.\n\t */\n\tremove( rangeOrItem ) {\n\t\tconst range = rangeOrItem instanceof Range ? rangeOrItem : Range._createOn( rangeOrItem );\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// If range is collapsed - nothing to remove.\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn new DocumentFragment();\n\t\t}\n\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\tconst count = breakEnd.offset - breakStart.offset;\n\n\t\t// Remove nodes in range.\n\t\tconst removed = parentContainer._removeChildren( breakStart.offset, count );\n\n\t\tfor ( const node of removed ) {\n\t\t\tthis._removeFromClonedElementsGroup( node );\n\t\t}\n\n\t\t// Merge after removing.\n\t\tconst mergePosition = this.mergeAttributes( breakStart );\n\t\trange.start = mergePosition;\n\t\trange.end = mergePosition.clone();\n\n\t\t// Return removed nodes.\n\t\treturn new DocumentFragment( removed );\n\t}\n\n\t/**\n\t * Removes matching elements from given range.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} range Range to clear.\n\t * @param {module:engine/view/element~Element} element Element to remove.\n\t */\n\tclear( range, element ) {\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Create walker on given range.\n\t\t// We walk backward because when we remove element during walk it modifies range end position.\n\t\tconst walker = range.getWalker( {\n\t\t\tdirection: 'backward',\n\t\t\tignoreElementEnd: true\n\t\t} );\n\n\t\t// Let's walk.\n\t\tfor ( const current of walker ) {\n\t\t\tconst item = current.item;\n\t\t\tlet rangeToRemove;\n\n\t\t\t// When current item matches to the given element.\n\t\t\tif ( item.is( 'element' ) && element.isSimilar( item ) ) {\n\t\t\t\t// Create range on this element.\n\t\t\t\trangeToRemove = Range._createOn( item );\n\t\t\t\t// When range starts inside Text or TextProxy element.\n\t\t\t} else if ( !current.nextPosition.isAfter( range.start ) && item.is( 'textProxy' ) ) {\n\t\t\t\t// We need to check if parent of this text matches to given element.\n\t\t\t\tconst parentElement = item.getAncestors().find( ancestor => {\n\t\t\t\t\treturn ancestor.is( 'element' ) && element.isSimilar( ancestor );\n\t\t\t\t} );\n\n\t\t\t\t// If it is then create range inside this element.\n\t\t\t\tif ( parentElement ) {\n\t\t\t\t\trangeToRemove = Range._createIn( parentElement );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we have found element to remove.\n\t\t\tif ( rangeToRemove ) {\n\t\t\t\t// We need to check if element range stick out of the given range and truncate if it is.\n\t\t\t\tif ( rangeToRemove.end.isAfter( range.end ) ) {\n\t\t\t\t\trangeToRemove.end = range.end;\n\t\t\t\t}\n\n\t\t\t\tif ( rangeToRemove.start.isBefore( range.start ) ) {\n\t\t\t\t\trangeToRemove.start = range.start;\n\t\t\t\t}\n\n\t\t\t\t// At the end we remove range with found element.\n\t\t\t\tthis.remove( rangeToRemove );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Moves nodes from provided range to target position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} sourceRange Range containing nodes to move.\n\t * @param {module:engine/view/position~Position} targetPosition Position to insert.\n\t * @returns {module:engine/view/range~Range} Range in target container. Inserted nodes are placed between\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions.\n\t */\n\tmove( sourceRange, targetPosition ) {\n\t\tlet nodes;\n\n\t\tif ( targetPosition.isAfter( sourceRange.end ) ) {\n\t\t\ttargetPosition = this._breakAttributes( targetPosition, true );\n\n\t\t\tconst parent = targetPosition.parent;\n\t\t\tconst countBefore = parent.childCount;\n\n\t\t\tsourceRange = this._breakAttributesRange( sourceRange, true );\n\n\t\t\tnodes = this.remove( sourceRange );\n\n\t\t\ttargetPosition.offset += ( parent.childCount - countBefore );\n\t\t} else {\n\t\t\tnodes = this.remove( sourceRange );\n\t\t}\n\n\t\treturn this.insert( targetPosition, nodes );\n\t}\n\n\t/**\n\t * Wraps elements within range with provided {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t * If a collapsed range is provided, it will be wrapped only if it is equal to view selection.\n\t *\n\t * If a collapsed range was passed and is same as selection, the selection\n\t * will be moved to the inside of the wrapped attribute element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-invalid-range-container`\n\t * when {@link module:engine/view/range~Range#start}\n\t * and {@link module:engine/view/range~Range#end} positions are not placed inside same parent container.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-nonselection-collapsed-range` when passed range\n\t * is collapsed and different than view selection.\n\t *\n\t * @param {module:engine/view/range~Range} range Range to wrap.\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute Attribute element to use as wrapper.\n\t * @returns {module:engine/view/range~Range} range Range after wrapping, spanning over wrapping attribute element.\n\t*/\n\twrap( range, attribute ) {\n\t\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\t\tthrow new CKEditorError( 'view-writer-wrap-invalid-attribute', this.document );\n\t\t}\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\tif ( !range.isCollapsed ) {\n\t\t\t// Non-collapsed range. Wrap it with the attribute element.\n\t\t\treturn this._wrapRange( range, attribute );\n\t\t} else {\n\t\t\t// Collapsed range. Wrap position.\n\t\t\tlet position = range.start;\n\n\t\t\tif ( position.parent.is( 'element' ) && !_hasNonUiChildren( position.parent ) ) {\n\t\t\t\tposition = position.getLastMatchingPosition( value => value.item.is( 'uiElement' ) );\n\t\t\t}\n\n\t\t\tposition = this._wrapPosition( position, attribute );\n\t\t\tconst viewSelection = this.document.selection;\n\n\t\t\t// If wrapping position is equal to view selection, move view selection inside wrapping attribute element.\n\t\t\tif ( viewSelection.isCollapsed && viewSelection.getFirstPosition().isEqual( range.start ) ) {\n\t\t\t\tthis.setSelection( position );\n\t\t\t}\n\n\t\t\treturn new Range( position );\n\t\t}\n\t}\n\n\t/**\n\t * Unwraps nodes within provided range from attribute element.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n\t * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n\t * same parent container.\n\t *\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t */\n\tunwrap( range, attribute ) {\n\t\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\t\t/**\n\t\t\t * Attribute element need to be instance of attribute element.\n\t\t\t *\n\t\t\t * @error view-writer-unwrap-invalid-attribute\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-unwrap-invalid-attribute', this.document );\n\t\t}\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// If range is collapsed - nothing to unwrap.\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn range;\n\t\t}\n\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Unwrap children located between break points.\n\t\tconst newRange = this._unwrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Renames element by creating a copy of renamed element but with changed name and then moving contents of the\n\t * old element to the new one. Keep in mind that this will invalidate all {@link module:engine/view/position~Position positions} which\n\t * has renamed element as {@link module:engine/view/position~Position#parent a parent}.\n\t *\n\t * New element has to be created because `Element#tagName` property in DOM is readonly.\n\t *\n\t * Since this function creates a new element and removes the given one, the new element is returned to keep reference.\n\t *\n\t * @param {String} newName New name for element.\n\t * @param {module:engine/view/containerelement~ContainerElement} viewElement Element to be renamed.\n\t */\n\trename( newName, viewElement ) {\n\t\tconst newElement = new ContainerElement( newName, viewElement.getAttributes() );\n\n\t\tthis.insert( Position._createAfter( viewElement ), newElement );\n\t\tthis.move( Range._createIn( viewElement ), Position._createAt( newElement, 0 ) );\n\t\tthis.remove( Range._createOn( viewElement ) );\n\n\t\treturn newElement;\n\t}\n\n\t/**\n\t * Cleans up memory by removing obsolete cloned elements group from the writer.\n\t *\n\t * Should be used whenever all {@link module:engine/view/attributeelement~AttributeElement attribute elements}\n\t * with the same {@link module:engine/view/attributeelement~AttributeElement#id id} are going to be removed from the view and\n\t * the group will no longer be needed.\n\t *\n\t * Cloned elements group are not removed automatically in case if the group is still needed after all its elements\n\t * were removed from the view.\n\t *\n\t * Keep in mind that group names are equal to the `id` property of the attribute element.\n\t *\n\t * @param {String} groupName Name of the group to clear.\n\t */\n\tclearClonedElementsGroup( groupName ) {\n\t\tthis._cloneGroups.delete( groupName );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t Creates new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'p' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Wraps children with provided `wrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be wrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} wrapElement\n\t */\n\t_wrapChildren( parent, startOffset, endOffset, wrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst wrapPositions = [];\n\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\t\t\tconst isText = child.is( 'text' );\n\t\t\tconst isAttribute = child.is( 'attributeElement' );\n\t\t\tconst isEmpty = child.is( 'emptyElement' );\n\t\t\tconst isUI = child.is( 'uiElement' );\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `wrapElement` is `<span class=\"foo\">` element.)\n\t\t\t//\n\t\t\t// Check if `wrapElement` can be joined with the wrapped element. One of requirements is having same name.\n\t\t\t// If possible, join elements.\n\t\t\t//\n\t\t\t// <p><span class=\"bar\">abc</span></p> --> <p><span class=\"foo bar\">abc</span></p>\n\t\t\t//\n\t\t\tif ( isAttribute && this._wrapAttributeElement( wrapElement, child ) ) {\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// Wrap the child if it is not an attribute element or if it is an attribute element that should be inside\n\t\t\t// `wrapElement` (due to priority).\n\t\t\t//\n\t\t\t// <p>abc</p> --> <p><span class=\"foo\">abc</span></p>\n\t\t\t// <p><strong>abc</strong></p> --> <p><span class=\"foo\"><strong>abc</strong></span></p>\n\t\t\t//\n\t\t\telse if ( isText || isEmpty || isUI || ( isAttribute && shouldABeOutsideB( wrapElement, child ) ) ) {\n\t\t\t\t// Clone attribute.\n\t\t\t\tconst newAttribute = wrapElement._clone();\n\n\t\t\t\t// Wrap current node with new attribute.\n\t\t\t\tchild._remove();\n\t\t\t\tnewAttribute._appendChild( child );\n\n\t\t\t\tparent._insertChild( i, newAttribute );\n\t\t\t\tthis._addToClonedElementsGroup( newAttribute );\n\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// If other nested attribute is found and it wasn't wrapped (see above), continue wrapping inside it.\n\t\t\t//\n\t\t\t// <p><a href=\"foo.html\">abc</a></p> --> <p><a href=\"foo.html\"><span class=\"foo\">abc</span></a></p>\n\t\t\t//\n\t\t\telse if ( isAttribute ) {\n\t\t\t\tthis._wrapChildren( child, 0, child.childCount, wrapElement );\n\t\t\t}\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each wrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of wrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Unwraps children from provided `unwrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} unwrapElement\n\t */\n\t_unwrapChildren( parent, startOffset, endOffset, unwrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst unwrapPositions = [];\n\n\t\t// Iterate over each element between provided offsets inside parent.\n\t\t// We don't use tree walker or range iterator because we will be removing and merging potentially multiple nodes,\n\t\t// so it could get messy. It is safer to it manually in this case.\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\n\t\t\t// Skip all text nodes. There should be no container element's here either.\n\t\t\tif ( !child.is( 'attributeElement' ) ) {\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `unwrapElement` is `<span class=\"foo\">` element.)\n\t\t\t//\n\t\t\t// If the child is similar to the given attribute element, unwrap it - it will be completely removed.\n\t\t\t//\n\t\t\t// <p><span class=\"foo\">abc</span>xyz</p> --> <p>abcxyz</p>\n\t\t\t//\n\t\t\tif ( child.isSimilar( unwrapElement ) ) {\n\t\t\t\tconst unwrapped = child.getChildren();\n\t\t\t\tconst count = child.childCount;\n\n\t\t\t\t// Replace wrapper element with its children\n\t\t\t\tchild._remove();\n\t\t\t\tparent._insertChild( i, unwrapped );\n\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\n\t\t\t\t// Save start and end position of moved items.\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + count )\n\t\t\t\t);\n\n\t\t\t\t// Skip elements that were unwrapped. Assuming there won't be another element to unwrap in child elements.\n\t\t\t\ti += count;\n\t\t\t\tendOffset += count - 1;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If the child is not similar but is an attribute element, try partial unwrapping - remove the same attributes/styles/classes.\n\t\t\t// Partial unwrapping will happen only if the elements have the same name.\n\t\t\t//\n\t\t\t// <p><span class=\"foo bar\">abc</span>xyz</p> --> <p><span class=\"bar\">abc</span>xyz</p>\n\t\t\t// <p><i class=\"foo\">abc</i>xyz</p> --> <p><i class=\"foo\">abc</i>xyz</p>\n\t\t\t//\n\t\t\tif ( this._unwrapAttributeElement( unwrapElement, child ) ) {\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + 1 )\n\t\t\t\t);\n\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If other nested attribute is found, look through it's children for elements to unwrap.\n\t\t\t//\n\t\t\t// <p><i><span class=\"foo\">abc</span></i><p> --> <p><i>abc</i><p>\n\t\t\t//\n\t\t\tthis._unwrapChildren( child, 0, child.childCount, unwrapElement );\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each unwrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of unwrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset || position.offset == endOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Helper function for `view.writer.wrap`. Wraps range with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/range~Range} New range after wrapping, spanning over wrapping attribute element.\n\t */\n\t_wrapRange( range, attribute ) {\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Wrap all children with attribute.\n\t\tconst newRange = this._wrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Helper function for {@link #wrap}. Wraps position with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/position~Position} New position after wrapping.\n\t */\n\t_wrapPosition( position, attribute ) {\n\t\t// Return same position when trying to wrap with attribute similar to position parent.\n\t\tif ( attribute.isSimilar( position.parent ) ) {\n\t\t\treturn movePositionToTextNode( position.clone() );\n\t\t}\n\n\t\t// When position is inside text node - break it and place new position between two text nodes.\n\t\tif ( position.parent.is( 'text' ) ) {\n\t\t\tposition = breakTextNode( position );\n\t\t}\n\n\t\t// Create fake element that will represent position, and will not be merged with other attributes.\n\t\tconst fakePosition = this.createAttributeElement();\n\t\tfakePosition._priority = Number.POSITIVE_INFINITY;\n\t\tfakePosition.isSimilar = () => false;\n\n\t\t// Insert fake element in position location.\n\t\tposition.parent._insertChild( position.offset, fakePosition );\n\n\t\t// Range around inserted fake attribute element.\n\t\tconst wrapRange = new Range( position, position.getShiftedBy( 1 ) );\n\n\t\t// Wrap fake element with attribute (it will also merge if possible).\n\t\tthis.wrap( wrapRange, attribute );\n\n\t\t// Remove fake element and place new position there.\n\t\tconst newPosition = new Position( fakePosition.parent, fakePosition.index );\n\t\tfakePosition._remove();\n\n\t\t// If position is placed between text nodes - merge them and return position inside.\n\t\tconst nodeBefore = newPosition.nodeBefore;\n\t\tconst nodeAfter = newPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof Text && nodeAfter instanceof Text ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\n\t\t// If position is next to text node - move position inside.\n\t\treturn movePositionToTextNode( newPosition );\n\t}\n\n\t/**\n\t * \tWraps one {@link module:engine/view/attributeelement~AttributeElement AttributeElement} into another by\n\t * \tmerging them if possible. When merging is possible - all attributes, styles and classes are moved from wrapper\n\t * \telement to element being wrapped.\n\t *\n\t * \t@private\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} toWrap AttributeElement to wrap using wrapper element.\n\t * \t@returns {Boolean} Returns `true` if elements are merged.\n\t */\n\t_wrapAttributeElement( wrapper, toWrap ) {\n\t\tif ( !canBeJoined( wrapper, toWrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't merge if name or priority differs.\n\t\tif ( wrapper.name !== toWrap.name || wrapper.priority !== toWrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes can be merged.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are different we cannot wrap.\n\t\t\tif ( toWrap.hasAttribute( key ) && toWrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles can be merged.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( toWrap.hasStyle( key ) && toWrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Move all attributes/classes/styles from wrapper to wrapped AttributeElement.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// Move only these attributes that are not present - other are similar.\n\t\t\tif ( !toWrap.hasAttribute( key ) ) {\n\t\t\t\tthis.setAttribute( key, wrapper.getAttribute( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( !toWrap.hasStyle( key ) ) {\n\t\t\t\tthis.setStyle( key, wrapper.getStyle( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getClassNames() ) {\n\t\t\tif ( !toWrap.hasClass( key ) ) {\n\t\t\t\tthis.addClass( key, toWrap );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Unwraps {@link module:engine/view/attributeelement~AttributeElement AttributeElement} from another by removing\n\t * corresponding attributes, classes and styles. All attributes, classes and styles from wrapper should be present\n\t * inside element being unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * @param {module:engine/view/attributeelement~AttributeElement} toUnwrap AttributeElement to unwrap using wrapper element.\n\t * @returns {Boolean} Returns `true` if elements are unwrapped.\n\t **/\n\t_unwrapAttributeElement( wrapper, toUnwrap ) {\n\t\tif ( !canBeJoined( wrapper, toUnwrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't unwrap if name or priority differs.\n\t\tif ( wrapper.name !== toUnwrap.name || wrapper.priority !== toUnwrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper attributes.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasAttribute( key ) || toUnwrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper classes.\n\t\tif ( !toUnwrap.hasClass( ...wrapper.getClassNames() ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper styles.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\t// If some styles are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasStyle( key ) || toUnwrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Remove all wrapper's attributes from unwrapped element.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tthis.removeAttribute( key, toUnwrap );\n\t\t}\n\n\t\t// Remove all wrapper's classes from unwrapped element.\n\t\tthis.removeClass( Array.from( wrapper.getClassNames() ), toUnwrap );\n\n\t\t// Remove all wrapper's styles from unwrapped element.\n\t\tthis.removeStyle( Array.from( wrapper.getStyleNames() ), toUnwrap );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at the boundaries of given range.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range Range which `start` and `end` positions will be used to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/range~Range} New range with located at break positions.\n\t */\n\t_breakAttributesRange( range, forceSplitText = false ) {\n\t\tconst rangeStart = range.start;\n\t\tconst rangeEnd = range.end;\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Break at the collapsed position. Return new collapsed range.\n\t\tif ( range.isCollapsed ) {\n\t\t\tconst position = this._breakAttributes( range.start, forceSplitText );\n\n\t\t\treturn new Range( position, position );\n\t\t}\n\n\t\tconst breakEnd = this._breakAttributes( rangeEnd, forceSplitText );\n\t\tconst count = breakEnd.parent.childCount;\n\t\tconst breakStart = this._breakAttributes( rangeStart, forceSplitText );\n\n\t\t// Calculate new break end offset.\n\t\tbreakEnd.offset += breakEnd.parent.childCount - count;\n\n\t\treturn new Range( breakStart, breakEnd );\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at given position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position\n\t * is placed inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position\n\t * is placed inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position Position where to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/position~Position} New position after breaking the attributes.\n\t */\n\t_breakAttributes( position, forceSplitText = false ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// If position is placed inside EmptyElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'emptyElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside EmptyElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-empty-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-empty-element', this.document );\n\t\t}\n\n\t\t// If position is placed inside UIElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'uiElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside UIElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-ui-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-ui-element', this.document );\n\t\t}\n\n\t\t// There are no attributes to break and text nodes breaking is not forced.\n\t\tif ( !forceSplitText && positionParent.is( 'text' ) && isContainerOrFragment( positionParent.parent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Position's parent is container, so no attributes to break.\n\t\tif ( isContainerOrFragment( positionParent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Break text and start again in new position.\n\t\tif ( positionParent.is( 'text' ) ) {\n\t\t\treturn this._breakAttributes( breakTextNode( position ), forceSplitText );\n\t\t}\n\n\t\tconst length = positionParent.childCount;\n\n\t\t// <p>foo<b><u>bar{}</u></b></p>\n\t\t// <p>foo<b><u>bar</u>[]</b></p>\n\t\t// <p>foo<b><u>bar</u></b>[]</p>\n\t\tif ( positionOffset == length ) {\n\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index + 1 );\n\n\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t} else {\n\t\t\t// <p>foo<b><u>{}bar</u></b></p>\n\t\t\t// <p>foo<b>[]<u>bar</u></b></p>\n\t\t\t// <p>foo{}<b><u>bar</u></b></p>\n\t\t\tif ( positionOffset === 0 ) {\n\t\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t\t// <p>foo<b><u>b{}ar</u></b></p>\n\t\t\t// <p>foo<b><u>b[]ar</u></b></p>\n\t\t\t// <p>foo<b><u>b</u>[]<u>ar</u></b></p>\n\t\t\t// <p>foo<b><u>b</u></b>[]<b><u>ar</u></b></p>\n\t\t\telse {\n\t\t\t\tconst offsetAfter = positionParent.index + 1;\n\n\t\t\t\t// Break element.\n\t\t\t\tconst clonedNode = positionParent._clone();\n\n\t\t\t\t// Insert cloned node to position's parent node.\n\t\t\t\tpositionParent.parent._insertChild( offsetAfter, clonedNode );\n\t\t\t\tthis._addToClonedElementsGroup( clonedNode );\n\n\t\t\t\t// Get nodes to move.\n\t\t\t\tconst count = positionParent.childCount - positionOffset;\n\t\t\t\tconst nodesToMove = positionParent._removeChildren( positionOffset, count );\n\n\t\t\t\t// Move nodes to cloned node.\n\t\t\t\tclonedNode._appendChild( nodesToMove );\n\n\t\t\t\t// Create new position to work on.\n\t\t\t\tconst newPosition = new Position( positionParent.parent, offsetAfter );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Stores the information that an {@link module:engine/view/attributeelement~AttributeElement attribute element} was\n\t * added to the tree. Saves the reference to the group in the given element and updates the group, so other elements\n\t * from the group now keep a reference to the given attribute element.\n\t *\n\t * The clones group can be obtained using {@link module:engine/view/attributeelement~AttributeElement#getElementsWithSameId}.\n\t *\n\t * Does nothing if added element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to save.\n\t */\n\t_addToClonedElementsGroup( element ) {\n\t\t// Add only if the element is in document tree.\n\t\tif ( !element.root.is( 'rootElement' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Traverse the element's children recursively to find other attribute elements that also might got inserted.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._addToClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tlet group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\tgroup = new Set();\n\t\t\tthis._cloneGroups.set( id, group );\n\t\t}\n\n\t\tgroup.add( element );\n\t\telement._clonesGroup = group;\n\t}\n\n\t/**\n\t * Removes all the information about the given {@link module:engine/view/attributeelement~AttributeElement attribute element}\n\t * from its clones group.\n\t *\n\t * Keep in mind, that the element will still keep a reference to the group (but the group will not keep a reference to it).\n\t * This allows to reference the whole group even if the element was already removed from the tree.\n\t *\n\t * Does nothing if the element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to remove.\n\t */\n\t_removeFromClonedElementsGroup( element ) {\n\t\t// Traverse the element's children recursively to find other attribute elements that also got removed.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\treturn;\n\t\t}\n\n\t\tgroup.delete( element );\n\t\t// Not removing group from element on purpose!\n\t\t// If other parts of code have reference to this element, they will be able to get references to other elements from the group.\n\t}\n}\n\n// Helper function for `view.writer.wrap`. Checks if given element has any children that are not ui elements.\nfunction _hasNonUiChildren( parent ) {\n\treturn Array.from( parent.getChildren() ).some( child => !child.is( 'uiElement' ) );\n}\n\n/**\n * Attribute element need to be instance of attribute element.\n *\n * @error view-writer-wrap-invalid-attribute\n */\n\n// Returns first parent container of specified {@link module:engine/view/position~Position Position}.\n// Position's parent node is checked as first, then next parents are checked.\n// Note that {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n//\n// @param {module:engine/view/position~Position} position Position used as a start point to locate parent container.\n// @returns {module:engine/view/containerelement~ContainerElement|module:engine/view/documentfragment~DocumentFragment|undefined}\n// Parent container element or `undefined` if container is not found.\nfunction getParentContainer( position ) {\n\tlet parent = position.parent;\n\n\twhile ( !isContainerOrFragment( parent ) ) {\n\t\tif ( !parent ) {\n\t\t\treturn undefined;\n\t\t}\n\t\tparent = parent.parent;\n\t}\n\n\treturn parent;\n}\n\n// Checks if first {@link module:engine/view/attributeelement~AttributeElement AttributeElement} provided to the function\n// can be wrapped otuside second element. It is done by comparing elements'\n// {@link module:engine/view/attributeelement~AttributeElement#priority priorities}, if both have same priority\n// {@link module:engine/view/element~Element#getIdentity identities} are compared.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} a\n// @param {module:engine/view/attributeelement~AttributeElement} b\n// @returns {Boolean}\nfunction shouldABeOutsideB( a, b ) {\n\tif ( a.priority < b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority > b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use identities.\n\treturn a.getIdentity() < b.getIdentity();\n}\n\n// Returns new position that is moved to near text node. Returns same position if there is no text node before of after\n// specified position.\n//\n//\t\t<p>foo[]</p> -> <p>foo{}</p>\n//\t\t<p>[]foo</p> -> <p>{}foo</p>\n//\n// @param {module:engine/view/position~Position} position\n// @returns {module:engine/view/position~Position} Position located inside text node or same position if there is no text nodes\n// before or after position location.\nfunction movePositionToTextNode( position ) {\n\tconst nodeBefore = position.nodeBefore;\n\n\tif ( nodeBefore && nodeBefore.is( 'text' ) ) {\n\t\treturn new Position( nodeBefore, nodeBefore.data.length );\n\t}\n\n\tconst nodeAfter = position.nodeAfter;\n\n\tif ( nodeAfter && nodeAfter.is( 'text' ) ) {\n\t\treturn new Position( nodeAfter, 0 );\n\t}\n\n\treturn position;\n}\n\n// Breaks text node into two text nodes when possible.\n//\n//\t\t<p>foo{}bar</p> -> <p>foo[]bar</p>\n//\t\t<p>{}foobar</p> -> <p>[]foobar</p>\n//\t\t<p>foobar{}</p> -> <p>foobar[]</p>\n//\n// @param {module:engine/view/position~Position} position Position that need to be placed inside text node.\n// @returns {module:engine/view/position~Position} New position after breaking text node.\nfunction breakTextNode( position ) {\n\tif ( position.offset == position.parent.data.length ) {\n\t\treturn new Position( position.parent.parent, position.parent.index + 1 );\n\t}\n\n\tif ( position.offset === 0 ) {\n\t\treturn new Position( position.parent.parent, position.parent.index );\n\t}\n\n\t// Get part of the text that need to be moved.\n\tconst textToMove = position.parent.data.slice( position.offset );\n\n\t// Leave rest of the text in position's parent.\n\tposition.parent._data = position.parent.data.slice( 0, position.offset );\n\n\t// Insert new text node after position's parent text node.\n\tposition.parent.parent._insertChild( position.parent.index + 1, new Text( textToMove ) );\n\n\t// Return new position between two newly created text nodes.\n\treturn new Position( position.parent.parent, position.parent.index + 1 );\n}\n\n// Merges two text nodes into first node. Removes second node and returns merge position.\n//\n// @param {module:engine/view/text~Text} t1 First text node to merge. Data from second text node will be moved at the end of\n// this text node.\n// @param {module:engine/view/text~Text} t2 Second text node to merge. This node will be removed after merging.\n// @returns {module:engine/view/position~Position} Position after merging text nodes.\nfunction mergeTextNodes( t1, t2 ) {\n\t// Merge text data into first text node and remove second one.\n\tconst nodeBeforeLength = t1.data.length;\n\tt1._data += t2.data;\n\tt2._remove();\n\n\treturn new Position( t1, nodeBeforeLength );\n}\n\n// Checks if provided nodes are valid to insert. Checks if each node is an instance of\n// {@link module:engine/view/text~Text Text} or {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n// {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElement} or\n// {@link module:engine/view/uielement~UIElement UIElement}.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n// contains instances that are not {@link module:engine/view/text~Text Texts},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElements},\n// {@link module:engine/view/uielement~UIElement UIElements},\n// {@link module:engine/view/attributeelement~AttributeElement AttributeElements} or\n// {@link module:engine/view/containerelement~ContainerElement ContainerElements}.\n//\n// @param Iterable.<module:engine/view/text~Text|module:engine/view/attributeelement~AttributeElement\n// |module:engine/view/containerelement~ContainerElement> nodes\n// @param {Object} errorContext\nfunction validateNodesToInsert( nodes, errorContext ) {\n\tfor ( const node of nodes ) {\n\t\tif ( !validNodesToInsert.some( ( validNode => node instanceof validNode ) ) ) { // eslint-disable-line no-use-before-define\n\t\t\t/**\n\t\t\t * Inserted nodes should be valid to insert. of {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n\t\t\t * {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n\t\t\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElement},\n\t\t\t * {@link module:engine/view/uielement~UIElement UIElement}, {@link module:engine/view/text~Text Text}.\n\t\t\t *\n\t\t\t * @error view-writer-insert-invalid-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-insert-invalid-node', errorContext );\n\t\t}\n\n\t\tif ( !node.is( 'text' ) ) {\n\t\t\tvalidateNodesToInsert( node.getChildren(), errorContext );\n\t\t}\n\t}\n}\n\nconst validNodesToInsert = [ Text, AttributeElement, ContainerElement, EmptyElement, UIElement ];\n\n// Checks if node is ContainerElement or DocumentFragment, because in most cases they should be treated the same way.\n//\n// @param {module:engine/view/node~Node} node\n// @returns {Boolean} Returns `true` if node is instance of ContainerElement or DocumentFragment.\nfunction isContainerOrFragment( node ) {\n\treturn node && ( node.is( 'containerElement' ) || node.is( 'documentFragment' ) );\n}\n\n// Checks if {@link module:engine/view/range~Range#start range start} and {@link module:engine/view/range~Range#end range end} are placed\n// inside same {@link module:engine/view/containerelement~ContainerElement container element}.\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when validation fails.\n//\n// @param {module:engine/view/range~Range} range\n// @param {Object} errorContext\nfunction validateRangeContainer( range, errorContext ) {\n\tconst startContainer = getParentContainer( range.start );\n\tconst endContainer = getParentContainer( range.end );\n\n\tif ( !startContainer || !endContainer || startContainer !== endContainer ) {\n\t\t/**\n\t\t * Range container is invalid. This can happen if {@link module:engine/view/range~Range#start range start} and\n\t\t * {@link module:engine/view/range~Range#end range end} positions are not placed inside same container or\n\t\t * parent container for these positions cannot be found.\n\t\t *\n\t\t * @error view-writer-invalid-range-container\n\t\t */\n\n\t\tthrow new CKEditorError( 'view-writer-invalid-range-container', errorContext );\n\t}\n}\n\n// Checks if two attribute elements can be joined together. Elements can be joined together if, and only if\n// they do not have ids specified.\n//\n// @private\n// @param {module:engine/view/element~Element} a\n// @param {module:engine/view/element~Element} b\n// @returns {Boolean}\nfunction canBeJoined( a, b ) {\n\treturn a.id === null && b.id === null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/istext\n */\n\n/**\n * Checks if the object is a native DOM Text node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isText( obj ) {\n\treturn Object.prototype.toString.call( obj ) == '[object Text]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\n\n/**\n * Set of utils related to block and inline fillers handling.\n *\n * Browsers do not allow to put caret in elements which does not have height. Because of it, we need to fill all\n * empty elements which should be selectable with elements or characters called \"fillers\". Unfortunately there is no one\n * universal filler, this is why two types are uses:\n *\n * * Block filler is an element which fill block elements, like `<p>`. CKEditor uses `<br>` as a block filler during the editing,\n * as browsers do natively. So instead of an empty `<p>` there will be `<p><br></p>`. The advantage of block filler is that\n * it is transparent for the selection, so when the caret is before the `<br>` and user presses right arrow he will be\n * moved to the next paragraph, not after the `<br>`. The disadvantage is that it breaks a block, so it can not be used\n * in the middle of a line of text. The {@link module:engine/view/filler~BR_FILLER `<br>` filler} can be replaced with any other\n * character in the data output, for instance {@link module:engine/view/filler~NBSP_FILLER non-breaking space}.\n *\n * * Inline filler is a filler which does not break a line of text, so it can be used inside the text, for instance in the empty\n * `<b>` surrendered by text: `foo<b></b>bar`, if we want to put the caret there. CKEditor uses a sequence of the zero-width\n * spaces as an {@link module:engine/view/filler~INLINE_FILLER inline filler} having the predetermined\n * {@link module:engine/view/filler~INLINE_FILLER_LENGTH length}. A sequence is used, instead of a single character to\n * avoid treating random zero-width spaces as the inline filler. Disadvantage of the inline filler is that it is not\n * transparent for the selection. The arrow key moves the caret between zero-width spaces characters, so the additional\n * code is needed to handle the caret.\n *\n * Both inline and block fillers are handled by the {@link module:engine/view/renderer~Renderer renderer} and are not present in the\n * view.\n *\n * @module engine/view/filler\n */\n\n/**\n * Non-breaking space filler creator. This is a function which creates ` ` text node.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~BR_FILLER\n * @function\n */\nexport const NBSP_FILLER = domDocument => domDocument.createTextNode( '\\u00A0' );\n\n/**\n * `<br>` filler creator. This is a function which creates `<br data-cke-filler=\"true\">` element.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~NBSP_FILLER\n * @function\n */\nexport const BR_FILLER = domDocument => {\n\tconst fillerBr = domDocument.createElement( 'br' );\n\tfillerBr.dataset.ckeFiller = true;\n\n\treturn fillerBr;\n};\n\n/**\n * Length of the {@link module:engine/view/filler~INLINE_FILLER INLINE_FILLER}.\n */\nexport const INLINE_FILLER_LENGTH = 7;\n\n/**\n * Inline filler which is a sequence of the zero width spaces.\n */\nexport const INLINE_FILLER = ( () => {\n\tlet inlineFiller = '';\n\n\tfor ( let i = 0; i < INLINE_FILLER_LENGTH; i++ ) {\n\t\tinlineFiller += '\\u200b';\n\t}\n\n\treturn inlineFiller;\n} )(); // Usu IIF so the INLINE_FILLER appears as a constant in the docs.\n\n/**\n * Checks if the node is a text node which starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( 'foo' ) ); // false\n *\t\tstartsWithFiller( document.createElement( 'p' ) ); // false\n *\n * @param {Node} domNode DOM node.\n * @returns {Boolean} True if the text node starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function startsWithFiller( domNode ) {\n\treturn isText( domNode ) && ( domNode.data.substr( 0, INLINE_FILLER_LENGTH ) === INLINE_FILLER );\n}\n\n/**\n * Checks if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // false\n *\n * @param {Text} domText DOM text node.\n * @returns {Boolean} True if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function isInlineFiller( domText ) {\n\treturn domText.data.length == INLINE_FILLER_LENGTH && startsWithFiller( domText );\n}\n\n/**\n * Get string data from the text node, removing an {@link module:engine/view/filler~INLINE_FILLER inline filler} from it,\n * if text node contains it.\n *\n *\t\tgetDataWithoutFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ) == 'foo' // true\n *\t\tgetDataWithoutFiller( document.createTextNode( 'foo' ) ) == 'foo' // true\n *\n * @param {Text} domText DOM text node, possible with inline filler.\n * @returns {String} Data without filler.\n */\nexport function getDataWithoutFiller( domText ) {\n\tif ( startsWithFiller( domText ) ) {\n\t\treturn domText.data.slice( INLINE_FILLER_LENGTH );\n\t} else {\n\t\treturn domText.data;\n\t}\n}\n\n/**\n * Assign key observer which move cursor from the end of the inline filler to the beginning of it when\n * the left arrow is pressed, so the filler does not break navigation.\n *\n * @param {module:engine/view/view~View} view View controller instance we should inject quirks handling on.\n */\nexport function injectQuirksHandling( view ) {\n\tview.document.on( 'keydown', jumpOverInlineFiller );\n}\n\n// Move cursor from the end of the inline filler to the beginning of it when, so the filler does not break navigation.\nfunction jumpOverInlineFiller( evt, data ) {\n\tif ( data.keyCode == keyCodes.arrowleft ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\tif ( domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed ) {\n\t\t\tconst domParent = domSelection.getRangeAt( 0 ).startContainer;\n\t\t\tconst domOffset = domSelection.getRangeAt( 0 ).startOffset;\n\n\t\t\tif ( startsWithFiller( domParent ) && domOffset <= INLINE_FILLER_LENGTH ) {\n\t\t\t\tdomSelection.collapse( domParent, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/fastdiff\n */\n\n/**\n * Finds positions of the first and last change in the given string/array and generates a set of changes:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ { index: 2, type: 'insert', values: [ 'x', 'y', 'z' ] } ]\n *\n *\t\tfastDiff( '12a', '12aa' );\n *\t\t// [ { index: 3, type: 'insert', values: [ 'a' ] } ]\n *\n *\t\tfastDiff( '12xyza', '12a' );\n *\t\t// [ { index: 2, type: 'delete', howMany: 3 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'a' ], [ '1', '2', 'a' ] );\n *\t\t// [ { index: 3, type: 'delete', howMany: 1 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'b', 'c', '3' ], [ '2', 'a', 'b' ] );\n *\t\t// [ { index: 0, type: 'insert', values: [ '2', 'a', 'b' ] }, { index: 3, type: 'delete', howMany: 6 } ]\n *\n * Passed arrays can contain any type of data, however to compare them correctly custom comparator function\n * should be passed as a third parameter:\n *\n *\t\tfastDiff( [ { value: 1 }, { value: 2 } ], [ { value: 1 }, { value: 3 } ], ( a, b ) => {\n *\t\t\treturn a.value === b.value;\n *\t\t} );\n *\t\t// [ { index: 1, type: 'insert', values: [ { value: 3 } ] }, { index: 2, type: 'delete', howMany: 1 } ]\n *\n * The resulted set of changes can be applied to the input in order to transform it into the output, for example:\n *\n *\t\tlet input = '12abc3';\n *\t\tconst output = '2ab';\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + change.values.join( '' ) + input.substring( change.index );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + input.substring( change.index + change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * or in case of arrays:\n *\n *\t\tlet input = [ '1', '2', 'a', 'b', 'c', '3' ];\n *\t\tconst output = [ '2', 'a', 'b' ];\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( change.values, input.slice( change.index ) );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( input.slice( change.index + change.howMany ) );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * By passing `true` as the fourth parameter (`atomicChanges`) the output of this function will become compatible with\n * the {@link module:utils/diff~diff `diff()`} function:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ 'equal', 'equal', 'insert', 'insert', 'insert', 'equal' ]\n *\n * The default output format of this function is compatible with the output format of\n * {@link module:utils/difftochanges~diffToChanges `diffToChanges()`}. The `diffToChanges()` input format is, in turn,\n * compatible with the output of {@link module:utils/diff~diff `diff()`}:\n *\n *\t\tconst a = '1234';\n *\t\tconst b = '12xyz34';\n *\n *\t\t// Both calls will return the same results (grouped changes format).\n *\t\tfastDiff( a, b );\n *\t\tdiffToChanges( diff( a, b ) );\n *\n *\t\t// Again, both calls will return the same results (atomic changes format).\n *\t\tfastDiff( a, b, null, true );\n *\t\tdiff( a, b );\n *\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Input array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default `===` (strict equal operator) is used.\n * @param {Boolean} [atomicChanges=false] Whether an array of `inset|delete|equal` operations should\n * be returned instead of changes set. This makes this function compatible with {@link module:utils/diff~diff `diff()`}.\n * @returns {Array} Array of changes.\n */\nexport default function fastDiff( a, b, cmp, atomicChanges = false ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\t// Transform text or any iterable into arrays for easier, consistent processing.\n\tif ( !Array.isArray( a ) ) {\n\t\ta = Array.from( a );\n\t}\n\n\tif ( !Array.isArray( b ) ) {\n\t\tb = Array.from( b );\n\t}\n\n\t// Find first and last change.\n\tconst changeIndexes = findChangeBoundaryIndexes( a, b, cmp );\n\n\t// Transform into changes array.\n\treturn atomicChanges ? changeIndexesToAtomicChanges( changeIndexes, b.length ) : changeIndexesToChanges( b, changeIndexes );\n}\n\n// Finds position of the first and last change in the given arrays. For example:\n//\n//\t\tconst indexes = findChangeBoundaryIndexes( [ '1', '2', '3', '4' ], [ '1', '3', '4', '2', '4' ] );\n//\t\tconsole.log( indexes ); // { firstIndex: 1, lastIndexOld: 3, lastIndexNew: 4 }\n//\n// The above indexes means that in the first array the modified part is `1[23]4` and in the second array it is `1[342]4`.\n// Based on such indexes, array with `insert`/`delete` operations which allows transforming first value into the second one\n// can be generated.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Object}\n// @returns {Number} return.firstIndex Index of the first change in both values (always the same for both).\n// @returns {Number} result.lastIndexOld Index of the last common value in `arr1`.\n// @returns {Number} result.lastIndexNew Index of the last common value in `arr2`.\nfunction findChangeBoundaryIndexes( arr1, arr2, cmp ) {\n\t// Find the first difference between passed values.\n\tconst firstIndex = findFirstDifferenceIndex( arr1, arr2, cmp );\n\n\t// If arrays are equal return -1 indexes object.\n\tif ( firstIndex === -1 ) {\n\t\treturn { firstIndex: -1, lastIndexOld: -1, lastIndexNew: -1 };\n\t}\n\n\t// Remove the common part of each value and reverse them to make it simpler to find the last difference between them.\n\tconst oldArrayReversed = cutAndReverse( arr1, firstIndex );\n\tconst newArrayReversed = cutAndReverse( arr2, firstIndex );\n\n\t// Find the first difference between reversed values.\n\t// It should be treated as \"how many elements from the end the last difference occurred\".\n\t//\n\t// For example:\n\t//\n\t// \t\t\t\tinitial\t->\tafter cut\t-> reversed:\n\t// oldValue:\t'321ba'\t->\t'21ba'\t\t-> 'ab12'\n\t// newValue:\t'31xba'\t->\t'1xba'\t\t-> 'abx1'\n\t// lastIndex:\t\t\t\t\t\t\t-> 2\n\t//\n\t// So the last change occurred two characters from the end of the arrays.\n\tconst lastIndex = findFirstDifferenceIndex( oldArrayReversed, newArrayReversed, cmp );\n\n\t// Use `lastIndex` to calculate proper offset, starting from the beginning (`lastIndex` kind of starts from the end).\n\tconst lastIndexOld = arr1.length - lastIndex;\n\tconst lastIndexNew = arr2.length - lastIndex;\n\n\treturn { firstIndex, lastIndexOld, lastIndexNew };\n}\n\n// Returns a first index on which given arrays differ. If both arrays are the same, -1 is returned.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Number}\nfunction findFirstDifferenceIndex( arr1, arr2, cmp ) {\n\tfor ( let i = 0; i < Math.max( arr1.length, arr2.length ); i++ ) {\n\t\tif ( arr1[ i ] === undefined || arr2[ i ] === undefined || !cmp( arr1[ i ], arr2[ i ] ) ) {\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn -1; // Return -1 if arrays are equal.\n}\n\n// Returns a copy of the given array with `howMany` elements removed starting from the beginning and in reversed order.\n//\n// @param {Array} arr Array to be processed.\n// @param {Number} howMany How many elements from array beginning to remove.\n// @returns {Array} Shortened and reversed array.\nfunction cutAndReverse( arr, howMany ) {\n\treturn arr.slice( howMany ).reverse();\n}\n\n// Generates changes array based on change indexes from `findChangeBoundaryIndexes` function. This function will\n// generate array with 0 (no changes), 1 (deletion or insertion) or 2 records (insertion and deletion).\n//\n// @param {Array} newArray New array for which change indexes were calculated.\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @returns {Array.<Object>} Array of changes compatible with {@link module:utils/difftochanges~diffToChanges} format.\nfunction changeIndexesToChanges( newArray, changeIndexes ) {\n\tconst result = [];\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// Order operations as 'insert', 'delete' array to keep compatibility with {@link module:utils/difftochanges~diffToChanges}\n\t// in most cases. However, 'diffToChanges' does not stick to any order so in some cases\n\t// (for example replacing '12345' with 'abcd') it will generate 'delete', 'insert' order.\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex,\n\t\t\ttype: 'insert',\n\t\t\tvalues: newArray.slice( firstIndex, lastIndexNew )\n\t\t} );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex + ( lastIndexNew - firstIndex ), // Increase index of what was inserted.\n\t\t\ttype: 'delete',\n\t\t\thowMany: lastIndexOld - firstIndex\n\t\t} );\n\t}\n\n\treturn result;\n}\n\n// Generates array with set `equal|insert|delete` operations based on change indexes from `findChangeBoundaryIndexes` function.\n//\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @param {Number} newLength Length of the new array on which `findChangeBoundaryIndexes` calculated change indexes.\n// @returns {Array.<String>} Array of changes compatible with {@link module:utils/diff~diff} format.\nfunction changeIndexesToAtomicChanges( changeIndexes, newLength ) {\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// No changes.\n\tif ( firstIndex === -1 ) {\n\t\treturn Array( newLength ).fill( 'equal' );\n\t}\n\n\tlet result = [];\n\tif ( firstIndex > 0 ) {\n\t\tresult = result.concat( Array( firstIndex ).fill( 'equal' ) );\n\t}\n\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexNew - firstIndex ).fill( 'insert' ) );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexOld - firstIndex ).fill( 'delete' ) );\n\t}\n\n\tif ( lastIndexNew < newLength ) {\n\t\tresult = result.concat( Array( newLength - lastIndexNew ).fill( 'equal' ) );\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/diff\n */\n\nimport fastDiff from '../src/fastdiff';\n\n// The following code is based on the \"O(NP) Sequence Comparison Algorithm\"\n// by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n\n/**\n * Calculates the difference between two arrays or strings producing an array containing a list of changes\n * necessary to transform input into output.\n *\n *\t\tdiff( 'aba', 'acca' ); // [ 'equal', 'insert', 'insert', 'delete', 'equal' ]\n *\n * This function is based on the \"O(NP) Sequence Comparison Algorithm\" by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n * Unfortunately, while it gives the most precise results, its to complex for longer strings/arrow (above 200 items).\n * Therefore, `diff()` automatically switches to {@link module:utils/fastdiff~fastDiff `fastDiff()`} when detecting\n * such a scenario. The return formats of both functions are identical.\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Output array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default === is used.\n * @returns {Array} Array of changes.\n */\nexport default function diff( a, b, cmp ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\tconst aLength = a.length;\n\tconst bLength = b.length;\n\n\t// Perform `fastDiff` for longer strings/arrays (see #269).\n\tif ( aLength > 200 || bLength > 200 || aLength + bLength > 300 ) {\n\t\treturn diff.fastDiff( a, b, cmp, true );\n\t}\n\n\t// Temporary action type statics.\n\tlet _insert, _delete;\n\n\t// Swapped the arrays to use the shorter one as the first one.\n\tif ( bLength < aLength ) {\n\t\tconst tmp = a;\n\n\t\ta = b;\n\t\tb = tmp;\n\n\t\t// We swap the action types as well.\n\t\t_insert = 'delete';\n\t\t_delete = 'insert';\n\t} else {\n\t\t_insert = 'insert';\n\t\t_delete = 'delete';\n\t}\n\n\tconst m = a.length;\n\tconst n = b.length;\n\tconst delta = n - m;\n\n\t// Edit scripts, for each diagonal.\n\tconst es = {};\n\t// Furthest points, the furthest y we can get on each diagonal.\n\tconst fp = {};\n\n\tfunction snake( k ) {\n\t\t// We use -1 as an alternative below to handle initial values ( instead of filling the fp with -1 first ).\n\t\t// Furthest points (y) on the diagonal below k.\n\t\tconst y1 = ( fp[ k - 1 ] !== undefined ? fp[ k - 1 ] : -1 ) + 1;\n\t\t// Furthest points (y) on the diagonal above k.\n\t\tconst y2 = fp[ k + 1 ] !== undefined ? fp[ k + 1 ] : -1;\n\t\t// The way we should go to get further.\n\t\tconst dir = y1 > y2 ? -1 : 1;\n\n\t\t// Clone previous changes array (if any).\n\t\tif ( es[ k + dir ] ) {\n\t\t\tes[ k ] = es[ k + dir ].slice( 0 );\n\t\t}\n\n\t\t// Create changes array.\n\t\tif ( !es[ k ] ) {\n\t\t\tes[ k ] = [];\n\t\t}\n\n\t\t// Push the action.\n\t\tes[ k ].push( y1 > y2 ? _insert : _delete );\n\n\t\t// Set the beginning coordinates.\n\t\tlet y = Math.max( y1, y2 );\n\t\tlet x = y - k;\n\n\t\t// Traverse the diagonal as long as the values match.\n\t\twhile ( x < m && y < n && cmp( a[ x ], b[ y ] ) ) {\n\t\t\tx++;\n\t\t\ty++;\n\t\t\t// Push no change action.\n\t\t\tes[ k ].push( 'equal' );\n\t\t}\n\n\t\treturn y;\n\t}\n\n\tlet p = 0;\n\tlet k;\n\n\t// Traverse the graph until we reach the end of the longer string.\n\tdo {\n\t\t// Updates furthest points and edit scripts for diagonals below delta.\n\t\tfor ( k = -p; k < delta; k++ ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest points and edit scripts for diagonals above delta.\n\t\tfor ( k = delta + p; k > delta; k-- ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest point and edit script for the delta diagonal.\n\t\t// note that the delta diagonal is the one which goes through the sink (m, n).\n\t\tfp[ delta ] = snake( delta );\n\n\t\tp++;\n\t} while ( fp[ delta ] !== n );\n\n\t// Return the final list of edit changes.\n\t// We remove the first item that represents the action for the injected nulls.\n\treturn es[ delta ].slice( 1 );\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\ndiff.fastDiff = fastDiff;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/insertat\n */\n\n/**\n * Inserts node to the parent at given index.\n *\n * @param {Element} parentElement Parent element.\n * @param {Number} index Insertions index.\n * @param {Node} nodeToInsert Node to insert.\n */\nexport default function insertAt( parentElement, index, nodeToInsert ) {\n\tparentElement.insertBefore( nodeToInsert, parentElement.childNodes[ index ] || null );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/remove\n */\n\n/**\n * Removes given node from parent.\n *\n * @param {Node} node Node to remove.\n */\nexport default function remove( node ) {\n\tconst parent = node.parentNode;\n\n\tif ( parent ) {\n\t\tparent.removeChild( node );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isnode\n */\n\n/**\n * Checks if the object is a native DOM Node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isNode( obj ) {\n\tif ( obj ) {\n\t\tif ( obj.defaultView ) {\n\t\t\treturn obj instanceof obj.defaultView.Document;\n\t\t} else if ( obj.ownerDocument && obj.ownerDocument.defaultView ) {\n\t\t\treturn obj instanceof obj.ownerDocument.defaultView.Node;\n\t\t}\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module engine/view/renderer\n */\n\nimport ViewText from './text';\nimport ViewPosition from './position';\nimport { INLINE_FILLER, INLINE_FILLER_LENGTH, startsWithFiller, isInlineFiller } from './filler';\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport insertAt from '@ckeditor/ckeditor5-utils/src/dom/insertat';\nimport remove from '@ckeditor/ckeditor5-utils/src/dom/remove';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport fastDiff from '@ckeditor/ckeditor5-utils/src/fastdiff';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Renderer is responsible for updating the DOM structure and the DOM selection based on\n * the {@link module:engine/view/renderer~Renderer#markToSync information about updated view nodes}.\n * In other words, it renders the view to the DOM.\n *\n * Its main responsibility is to make only the necessary, minimal changes to the DOM. However, unlike in many\n * virtual DOM implementations, the primary reason for doing minimal changes is not the performance but ensuring\n * that native editing features such as text composition, autocompletion, spell checking, selection's x-index are\n * affected as little as possible.\n *\n * Renderer uses {@link module:engine/view/domconverter~DomConverter} to transform view nodes and positions\n * to and from the DOM.\n */\nexport default class Renderer {\n\t/**\n\t * Creates a renderer instance.\n\t *\n\t * @param {module:engine/view/domconverter~DomConverter} domConverter Converter instance.\n\t * @param {module:engine/view/documentselection~DocumentSelection} selection View selection.\n\t */\n\tconstructor( domConverter, selection ) {\n\t\t/**\n\t\t * Set of DOM Documents instances.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<Document>}\n\t\t */\n\t\tthis.domDocuments = new Set();\n\n\t\t/**\n\t\t * Converter instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = domConverter;\n\n\t\t/**\n\t\t * Set of nodes which attributes changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedAttributes = new Set();\n\n\t\t/**\n\t\t * Set of elements which child lists changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedChildren = new Set();\n\n\t\t/**\n\t\t * Set of text nodes which text data changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.<module:engine/view/node~Node>}\n\t\t */\n\t\tthis.markedTexts = new Set();\n\n\t\t/**\n\t\t * View selection. Renderer updates DOM selection based on the view selection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = selection;\n\n\t\t/**\n\t\t * Indicates if the view document is focused and selection can be rendered. Selection will not be rendered if\n\t\t * this is set to `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isFocused = false;\n\n\t\t/**\n\t\t * The text node in which the inline filler was rendered.\n\t\t *\n\t\t * @private\n\t\t * @member {Text}\n\t\t */\n\t\tthis._inlineFiller = null;\n\n\t\t/**\n\t\t * DOM element containing fake selection.\n\t\t *\n\t\t * @private\n\t\t * @type {null|HTMLElement}\n\t\t */\n\t\tthis._fakeSelectionContainer = null;\n\t}\n\n\t/**\n\t * Marks a view node to be updated in the DOM by {@link #render `render()`}.\n\t *\n\t * Note that only view nodes whose parents have corresponding DOM elements need to be marked to be synchronized.\n\t *\n\t * @see #markedAttributes\n\t * @see #markedChildren\n\t * @see #markedTexts\n\t *\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Node to be marked.\n\t */\n\tmarkToSync( type, node ) {\n\t\tif ( type === 'text' ) {\n\t\t\tif ( this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis.markedTexts.add( node );\n\t\t\t}\n\t\t} else {\n\t\t\t// If the node has no DOM element it is not rendered yet,\n\t\t\t// its children/attributes do not need to be marked to be sync.\n\t\t\tif ( !this.domConverter.mapViewToDom( node ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( type === 'attributes' ) {\n\t\t\t\tthis.markedAttributes.add( node );\n\t\t\t} else if ( type === 'children' ) {\n\t\t\t\tthis.markedChildren.add( node );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * Unknown type passed to Renderer.markToSync.\n\t\t\t\t *\n\t\t\t\t * @error renderer-unknown-type\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.', this );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders all buffered changes ({@link #markedAttributes}, {@link #markedChildren} and {@link #markedTexts}) and\n\t * the current view selection (if needed) to the DOM by applying a minimal set of changes to it.\n\t *\n\t * Renderer tries not to break the text composition (e.g. IME) and x-index of the selection,\n\t * so it does as little as it is needed to update the DOM.\n\t *\n\t * Renderer also handles {@link module:engine/view/filler fillers}. Especially, it checks if the inline filler is needed\n\t * at the selection position and adds or removes it. To prevent breaking text composition inline filler will not be\n\t * removed as long as the selection is in the text node which needed it at first.\n\t */\n\trender() {\n\t\tlet inlineFillerPosition;\n\n\t\t// Refresh mappings.\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildrenMappings( element );\n\t\t}\n\n\t\t// There was inline filler rendered in the DOM but it's not\n\t\t// at the selection position any more, so we can remove it\n\t\t// (cause even if it's needed, it must be placed in another location).\n\t\tif ( this._inlineFiller && !this._isSelectionInInlineFiller() ) {\n\t\t\tthis._removeInlineFiller();\n\t\t}\n\n\t\t// If we've got the filler, let's try to guess its position in the view.\n\t\tif ( this._inlineFiller ) {\n\t\t\tinlineFillerPosition = this._getInlineFillerPosition();\n\t\t}\n\t\t// Otherwise, if it's needed, create it at the selection position.\n\t\telse if ( this._needsInlineFillerAtSelection() ) {\n\t\t\tinlineFillerPosition = this.selection.getFirstPosition();\n\n\t\t\t// Do not use `markToSync` so it will be added even if the parent is already added.\n\t\t\tthis.markedChildren.add( inlineFillerPosition.parent );\n\t\t}\n\n\t\tfor ( const element of this.markedAttributes ) {\n\t\t\tthis._updateAttrs( element );\n\t\t}\n\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildren( element, { inlineFillerPosition } );\n\t\t}\n\n\t\tfor ( const node of this.markedTexts ) {\n\t\t\tif ( !this.markedChildren.has( node.parent ) && this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis._updateText( node, { inlineFillerPosition } );\n\t\t\t}\n\t\t}\n\n\t\t// Check whether the inline filler is required and where it really is in the DOM.\n\t\t// At this point in most cases it will be in the DOM, but there are exceptions.\n\t\t// For example, if the inline filler was deep in the created DOM structure, it will not be created.\n\t\t// Similarly, if it was removed at the beginning of this function and then neither text nor children were updated,\n\t\t// it will not be present.\n\t\t// Fix those and similar scenarios.\n\t\tif ( inlineFillerPosition ) {\n\t\t\tconst fillerDomPosition = this.domConverter.viewPositionToDom( inlineFillerPosition );\n\t\t\tconst domDocument = fillerDomPosition.parent.ownerDocument;\n\n\t\t\tif ( !startsWithFiller( fillerDomPosition.parent ) ) {\n\t\t\t\t// Filler has not been created at filler position. Create it now.\n\t\t\t\tthis._inlineFiller = addInlineFiller( domDocument, fillerDomPosition.parent, fillerDomPosition.offset );\n\t\t\t} else {\n\t\t\t\t// Filler has been found, save it.\n\t\t\t\tthis._inlineFiller = fillerDomPosition.parent;\n\t\t\t}\n\t\t} else {\n\t\t\t// There is no filler needed.\n\t\t\tthis._inlineFiller = null;\n\t\t}\n\n\t\tthis._updateSelection();\n\t\tthis._updateFocus();\n\n\t\tthis.markedTexts.clear();\n\t\tthis.markedAttributes.clear();\n\t\tthis.markedChildren.clear();\n\t}\n\n\t/**\n\t * Updates mappings of view element's children.\n\t *\n\t * Children that were replaced in the view structure by similar elements (same tag name) are treated as 'replaced'.\n\t * This means that their mappings can be updated so the new view elements are mapped to the existing DOM elements.\n\t * Thanks to that these elements do not need to be re-rendered completely.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose children mappings will be updated.\n\t */\n\t_updateChildrenMappings( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM and there is no need to process it.\n\t\t\treturn;\n\t\t}\n\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { withChildren: false } )\n\t\t);\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\t\tconst actions = this._findReplaceActions( diff, actualDomChildren, expectedDomChildren );\n\n\t\tif ( actions.indexOf( 'replace' ) !== -1 ) {\n\t\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'replace' ) {\n\t\t\t\t\tconst insertIndex = counter.equal + counter.insert;\n\t\t\t\t\tconst deleteIndex = counter.equal + counter.delete;\n\t\t\t\t\tconst viewChild = viewElement.getChild( insertIndex );\n\n\t\t\t\t\t// The 'uiElement' is a special one and its children are not stored in a view (#799),\n\t\t\t\t\t// so we cannot use it with replacing flow (since it uses view children during rendering\n\t\t\t\t\t// which will always result in rendering empty element).\n\t\t\t\t\tif ( viewChild && !viewChild.is( 'uiElement' ) ) {\n\t\t\t\t\t\tthis._updateElementMappings( viewChild, actualDomChildren[ deleteIndex ] );\n\t\t\t\t\t}\n\n\t\t\t\t\tremove( expectedDomChildren[ insertIndex ] );\n\t\t\t\t\tcounter.equal++;\n\t\t\t\t} else {\n\t\t\t\t\tcounter[ action ]++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Updates mappings of a given view element.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose mappings will be updated.\n\t * @param {Node} domElement The DOM element representing the given view element.\n\t */\n\t_updateElementMappings( viewElement, domElement ) {\n\t\t// Remap 'DomConverter' bindings.\n\t\tthis.domConverter.unbindDomElement( domElement );\n\t\tthis.domConverter.bindElements( domElement, viewElement );\n\n\t\t// View element may have children which needs to be updated, but are not marked, mark them to update.\n\t\tthis.markedChildren.add( viewElement );\n\n\t\t// Because we replace new view element mapping with the existing one, the corresponding DOM element\n\t\t// will not be rerendered. The new view element may have different attributes than the previous one.\n\t\t// Since its corresponding DOM element will not be rerendered, new attributes will not be added\n\t\t// to the DOM, so we need to mark it here to make sure its attributes gets updated. See #1427 for more\n\t\t// detailed case study.\n\t\t// Also there are cases where replaced element is removed from the view structure and then has\n\t\t// its attributes changed or removed. In such cases the element will not be present in `markedAttributes`\n\t\t// and also may be the same (`element.isSimilar()`) as the reused element not having its attributes updated.\n\t\t// To prevent such situations we always mark reused element to have its attributes rerenderd (#1560).\n\t\tthis.markedAttributes.add( viewElement );\n\t}\n\n\t/**\n\t * Gets the position of the inline filler based on the current selection.\n\t * Here, we assume that we know that the filler is needed and\n\t * {@link #_isSelectionInInlineFiller is at the selection position}, and, since it is needed,\n\t * it is somewhere at the selection position.\n\t *\n\t * Note: The filler position cannot be restored based on the filler's DOM text node, because\n\t * when this method is called (before rendering), the bindings will often be broken. View-to-DOM\n\t * bindings are only dependable after rendering.\n\t *\n\t * @private\n\t * @returns {module:engine/view/position~Position}\n\t */\n\t_getInlineFillerPosition() {\n\t\tconst firstPos = this.selection.getFirstPosition();\n\n\t\tif ( firstPos.parent.is( 'text' ) ) {\n\t\t\treturn ViewPosition._createBefore( this.selection.getFirstPosition().parent );\n\t\t} else {\n\t\t\treturn firstPos;\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` if the selection has not left the inline filler's text node.\n\t * If it is `true`, it means that the filler had been added for a reason and the selection did not\n\t * leave the filler's text node. For example, the user can be in the middle of a composition so it should not be touched.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler and selection are in the same place.\n\t */\n\t_isSelectionInInlineFiller() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Note, we can't check if selection's position equals position of the\n\t\t// this._inlineFiller node, because of #663. We may not be able to calculate\n\t\t// the filler's position in the view at this stage.\n\t\t// Instead, we check it the other way – whether selection is anchored in\n\t\t// that text node or next to it.\n\n\t\t// Possible options are:\n\t\t// \"FILLER{}\"\n\t\t// \"FILLERadded-text{}\"\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst position = this.domConverter.viewPositionToDom( selectionPosition );\n\n\t\tif ( position && isText( position.parent ) && startsWithFiller( position.parent ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes the inline filler.\n\t *\n\t * @private\n\t */\n\t_removeInlineFiller() {\n\t\tconst domFillerNode = this._inlineFiller;\n\n\t\t// Something weird happened and the stored node doesn't contain the filler's text.\n\t\tif ( !startsWithFiller( domFillerNode ) ) {\n\t\t\t/**\n\t\t\t * The inline filler node was lost. Most likely, something overwrote the filler text node\n\t\t\t * in the DOM.\n\t\t\t *\n\t\t\t * @error view-renderer-filler-was-lost\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-renderer-filler-was-lost: The inline filler node was lost.', this );\n\t\t}\n\n\t\tif ( isInlineFiller( domFillerNode ) ) {\n\t\t\tdomFillerNode.parentNode.removeChild( domFillerNode );\n\t\t} else {\n\t\t\tdomFillerNode.data = domFillerNode.data.substr( INLINE_FILLER_LENGTH );\n\t\t}\n\n\t\tthis._inlineFiller = null;\n\t}\n\n\t/**\n\t * Checks if the inline {@link module:engine/view/filler filler} should be added.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler should be added.\n\t */\n\t_needsInlineFillerAtSelection() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst selectionParent = selectionPosition.parent;\n\t\tconst selectionOffset = selectionPosition.offset;\n\n\t\t// If there is no DOM root we do not care about fillers.\n\t\tif ( !this.domConverter.mapViewToDom( selectionParent.root ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !( selectionParent.is( 'element' ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Prevent adding inline filler inside elements with contenteditable=false.\n\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1170\n\t\tif ( !isEditable( selectionParent ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// We have block filler, we do not need inline one.\n\t\tif ( selectionOffset === selectionParent.getFillerOffset() ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst nodeBefore = selectionPosition.nodeBefore;\n\t\tconst nodeAfter = selectionPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText || nodeAfter instanceof ViewText ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks if text needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} viewText View text to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateText( viewText, options ) {\n\t\tconst domText = this.domConverter.findCorrespondingDomText( viewText );\n\t\tconst newDomText = this.domConverter.viewToDom( viewText, domText.ownerDocument );\n\n\t\tconst actualText = domText.data;\n\t\tlet expectedText = newDomText.data;\n\n\t\tconst filler = options.inlineFillerPosition;\n\n\t\tif ( filler && filler.parent == viewText.parent && filler.offset == viewText.index ) {\n\t\t\texpectedText = INLINE_FILLER + expectedText;\n\t\t}\n\n\t\tif ( actualText != expectedText ) {\n\t\t\tconst actions = fastDiff( actualText, expectedText );\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action.type === 'insert' ) {\n\t\t\t\t\tdomText.insertData( action.index, action.values.join( '' ) );\n\t\t\t\t} else { // 'delete'\n\t\t\t\t\tdomText.deleteData( action.index, action.howMany );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if attribute list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement The view element to update.\n\t */\n\t_updateAttrs( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that 'viewElement' is outdated as its mapping was updated\n\t\t\t// in 'this._updateChildrenMappings()'. There is no need to process it as new view element which\n\t\t\t// replaced old 'viewElement' mapping was also added to 'this.markedAttributes'\n\t\t\t// in 'this._updateChildrenMappings()' so it will be processed separately.\n\t\t\treturn;\n\t\t}\n\n\t\tconst domAttrKeys = Array.from( domElement.attributes ).map( attr => attr.name );\n\t\tconst viewAttrKeys = viewElement.getAttributeKeys();\n\n\t\t// Add or overwrite attributes.\n\t\tfor ( const key of viewAttrKeys ) {\n\t\t\tdomElement.setAttribute( key, viewElement.getAttribute( key ) );\n\t\t}\n\n\t\t// Remove from DOM attributes which do not exists in the view.\n\t\tfor ( const key of domAttrKeys ) {\n\t\t\tif ( !viewElement.hasAttribute( key ) ) {\n\t\t\t\tdomElement.removeAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if elements child list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement View element to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateChildren( viewElement, options ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM.\n\t\t\t// There is no need to process it. It will be processed when re-inserted.\n\t\t\treturn;\n\t\t}\n\n\t\tconst inlineFillerPosition = options.inlineFillerPosition;\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { bind: true, inlineFillerPosition } )\n\t\t);\n\n\t\t// Inline filler element has to be created as it is present in the DOM, but not in the view. It is required\n\t\t// during diffing so text nodes could be compared correctly and also during rendering to maintain\n\t\t// proper order and indexes while updating the DOM.\n\t\tif ( inlineFillerPosition && inlineFillerPosition.parent === viewElement ) {\n\t\t\taddInlineFiller( domElement.ownerDocument, expectedDomChildren, inlineFillerPosition.offset );\n\t\t}\n\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\n\t\tlet i = 0;\n\t\tconst nodesToUnbind = new Set();\n\n\t\tfor ( const action of diff ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\tinsertAt( domElement, i, expectedDomChildren[ i ] );\n\t\t\t\ti++;\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tnodesToUnbind.add( actualDomChildren[ i ] );\n\t\t\t\tremove( actualDomChildren[ i ] );\n\t\t\t} else { // 'equal'\n\t\t\t\t// Force updating text nodes inside elements which did not change and do not need to be re-rendered (#1125).\n\t\t\t\tthis._markDescendantTextToSync( this.domConverter.domToView( expectedDomChildren[ i ] ) );\n\t\t\t\ti++;\n\t\t\t}\n\t\t}\n\n\t\t// Unbind removed nodes. When node does not have a parent it means that it was removed from DOM tree during\n\t\t// comparision with the expected DOM. We don't need to check child nodes, because if child node was reinserted,\n\t\t// it was moved to DOM tree out of the removed node.\n\t\tfor ( const node of nodesToUnbind ) {\n\t\t\tif ( !node.parentNode ) {\n\t\t\t\tthis.domConverter.unbindDomElement( node );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Shorthand for diffing two arrays or node lists of DOM nodes.\n\t *\n\t * @private\n\t * @param {Array.<Node>|NodeList} actualDomChildren Actual DOM children\n\t * @param {Array.<Node>|NodeList} expectedDomChildren Expected DOM children.\n\t * @returns {Array.<String>} The list of actions based on the {@link module:utils/diff~diff} function.\n\t */\n\t_diffNodeLists( actualDomChildren, expectedDomChildren ) {\n\t\tactualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );\n\n\t\treturn diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter ) );\n\t}\n\n\t/**\n\t * Finds DOM nodes that were replaced with the similar nodes (same tag name) in the view. All nodes are compared\n\t * within one `insert`/`delete` action group, for example:\n\t *\n\t * \t\tActual DOM:\t\t<p><b>Foo</b>Bar<i>Baz</i><b>Bax</b></p>\n\t * \t\tExpected DOM:\t<p>Bar<b>123</b><i>Baz</i><b>456</b></p>\n\t * \t\tInput actions:\t[ insert, insert, delete, delete, equal, insert, delete ]\n\t * \t\tOutput actions:\t[ insert, replace, delete, equal, replace ]\n\t *\n\t * @private\n\t * @param {Array.<String>} actions Actions array which is a result of the {@link module:utils/diff~diff} function.\n\t * @param {Array.<Node>|NodeList} actualDom Actual DOM children\n\t * @param {Array.<Node>} expectedDom Expected DOM children.\n\t * @returns {Array.<String>} Actions array modified with the `replace` actions.\n\t */\n\t_findReplaceActions( actions, actualDom, expectedDom ) {\n\t\t// If there is no both 'insert' and 'delete' actions, no need to check for replaced elements.\n\t\tif ( actions.indexOf( 'insert' ) === -1 || actions.indexOf( 'delete' ) === -1 ) {\n\t\t\treturn actions;\n\t\t}\n\n\t\tlet newActions = [];\n\t\tlet actualSlice = [];\n\t\tlet expectedSlice = [];\n\n\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\tfor ( const action of actions ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\texpectedSlice.push( expectedDom[ counter.equal + counter.insert ] );\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tactualSlice.push( actualDom[ counter.equal + counter.delete ] );\n\t\t\t} else { // equal\n\t\t\t\tnewActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t\t\t\tnewActions.push( 'equal' );\n\t\t\t\t// Reset stored elements on 'equal'.\n\t\t\t\tactualSlice = [];\n\t\t\t\texpectedSlice = [];\n\t\t\t}\n\t\t\tcounter[ action ]++;\n\t\t}\n\n\t\treturn newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t}\n\n\t/**\n\t * Marks text nodes to be synchronized.\n\t *\n\t * If a text node is passed, it will be marked. If an element is passed, all descendant text nodes inside it will be marked.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewNode View node to sync.\n\t */\n\t_markDescendantTextToSync( viewNode ) {\n\t\tif ( !viewNode ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tthis.markedTexts.add( viewNode );\n\t\t} else if ( viewNode.is( 'element' ) ) {\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tthis._markDescendantTextToSync( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if the selection needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateSelection() {\n\t\t// If there is no selection - remove DOM and fake selections.\n\t\tif ( this.selection.rangeCount === 0 ) {\n\t\t\tthis._removeDomSelection();\n\t\t\tthis._removeFakeSelection();\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst domRoot = this.domConverter.mapViewToDom( this.selection.editableElement );\n\n\t\t// Do nothing if there is no focus, or there is no DOM element corresponding to selection's editable element.\n\t\tif ( !this.isFocused || !domRoot ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Render selection.\n\t\tif ( this.selection.isFake ) {\n\t\t\tthis._updateFakeSelection( domRoot );\n\t\t} else {\n\t\t\tthis._removeFakeSelection();\n\t\t\tthis._updateDomSelection( domRoot );\n\t\t}\n\t}\n\n\t/**\n\t * Updates the fake selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the fake selection container should be added.\n\t */\n\t_updateFakeSelection( domRoot ) {\n\t\tconst domDocument = domRoot.ownerDocument;\n\n\t\tif ( !this._fakeSelectionContainer ) {\n\t\t\tthis._fakeSelectionContainer = createFakeSelectionContainer( domDocument );\n\t\t}\n\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\t// Bind fake selection container with the current selection *position*.\n\t\tthis.domConverter.bindFakeSelection( container, this.selection );\n\n\t\tif ( !this._fakeSelectionNeedsUpdate( domRoot ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !container.parentElement || container.parentElement != domRoot ) {\n\t\t\tdomRoot.appendChild( container );\n\t\t}\n\n\t\tcontainer.textContent = this.selection.fakeSelectionLabel || '\\u00A0';\n\n\t\tconst domSelection = domDocument.getSelection();\n\t\tconst domRange = domDocument.createRange();\n\n\t\tdomSelection.removeAllRanges();\n\t\tdomRange.selectNodeContents( container );\n\t\tdomSelection.addRange( domRange );\n\t}\n\n\t/**\n\t * Updates the DOM selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the DOM selection should be rendered.\n\t */\n\t_updateDomSelection( domRoot ) {\n\t\tconst domSelection = domRoot.ownerDocument.defaultView.getSelection();\n\n\t\t// Let's check whether DOM selection needs updating at all.\n\t\tif ( !this._domSelectionNeedsUpdate( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Multi-range selection is not available in most browsers, and, at least in Chrome, trying to\n\t\t// set such selection, that is not continuous, throws an error. Because of that, we will just use anchor\n\t\t// and focus of view selection.\n\t\t// Since we are not supporting multi-range selection, we also do not need to check if proper editable is\n\t\t// selected. If there is any editable selected, it is okay (editable is taken from selection anchor).\n\t\tconst anchor = this.domConverter.viewPositionToDom( this.selection.anchor );\n\t\tconst focus = this.domConverter.viewPositionToDom( this.selection.focus );\n\n\t\t// Focus the new editing host.\n\t\t// Otherwise, FF may throw an error (https://github.com/ckeditor/ckeditor5/issues/721).\n\t\tdomRoot.focus();\n\n\t\tdomSelection.collapse( anchor.parent, anchor.offset );\n\t\tdomSelection.extend( focus.parent, focus.offset );\n\n\t\t// Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n\t\tif ( env.isGecko ) {\n\t\t\tfixGeckoSelectionAfterBr( focus, domSelection );\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether a given DOM selection needs to be updated.\n\t *\n\t * @private\n\t * @param {Selection} domSelection The DOM selection to check.\n\t * @returns {Boolean}\n\t */\n\t_domSelectionNeedsUpdate( domSelection ) {\n\t\tif ( !this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\t// Current DOM selection is in incorrect position. We need to update it.\n\t\t\treturn true;\n\t\t}\n\n\t\tconst oldViewSelection = domSelection && this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( oldViewSelection && this.selection.isEqual( oldViewSelection ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If selection is not collapsed, it does not need to be updated if it is similar.\n\t\tif ( !this.selection.isCollapsed && this.selection.isSimilar( oldViewSelection ) ) {\n\t\t\t// Selection did not changed and is correct, do not update.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Selections are not similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether the fake selection needs to be updated.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where a new fake selection container should be added.\n\t * @returns {Boolean}\n\t */\n\t_fakeSelectionNeedsUpdate( domRoot ) {\n\t\tconst container = this._fakeSelectionContainer;\n\t\tconst domSelection = domRoot.ownerDocument.getSelection();\n\n\t\t// Fake selection needs to be updated if there's no fake selection container, or the container currently sits\n\t\t// in a different root.\n\t\tif ( !container || container.parentElement !== domRoot ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Make sure that the selection actually is within the fake selection.\n\t\tif ( domSelection.anchorNode !== container && !container.contains( domSelection.anchorNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn container.textContent !== this.selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Removes the DOM selection.\n\t *\n\t * @private\n\t */\n\t_removeDomSelection() {\n\t\tfor ( const doc of this.domDocuments ) {\n\t\t\tconst domSelection = doc.getSelection();\n\n\t\t\tif ( domSelection.rangeCount ) {\n\t\t\t\tconst activeDomElement = doc.activeElement;\n\t\t\t\tconst viewElement = this.domConverter.mapDomToView( activeDomElement );\n\n\t\t\t\tif ( activeDomElement && viewElement ) {\n\t\t\t\t\tdoc.getSelection().removeAllRanges();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes the fake selection.\n\t *\n\t * @private\n\t */\n\t_removeFakeSelection() {\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\tif ( container ) {\n\t\t\tcontainer.remove();\n\t\t}\n\t}\n\n\t/**\n\t * Checks if focus needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateFocus() {\n\t\tif ( this.isFocused ) {\n\t\t\tconst editable = this.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t}\n\t\t}\n\t}\n}\n\nmix( Renderer, ObservableMixin );\n\n// Checks if provided element is editable.\n//\n// @private\n// @param {module:engine/view/element~Element} element\n// @returns {Boolean}\nfunction isEditable( element ) {\n\tif ( element.getAttribute( 'contenteditable' ) == 'false' ) {\n\t\treturn false;\n\t}\n\n\tconst parent = element.findAncestor( element => element.hasAttribute( 'contenteditable' ) );\n\n\treturn !parent || parent.getAttribute( 'contenteditable' ) == 'true';\n}\n\n// Adds inline filler at a given position.\n//\n// The position can be given as an array of DOM nodes and an offset in that array,\n// or a DOM parent element and an offset in that element.\n//\n// @private\n// @param {Document} domDocument\n// @param {Element|Array.<Node>} domParentOrArray\n// @param {Number} offset\n// @returns {Text} The DOM text node that contains an inline filler.\nfunction addInlineFiller( domDocument, domParentOrArray, offset ) {\n\tconst childNodes = domParentOrArray instanceof Array ? domParentOrArray : domParentOrArray.childNodes;\n\tconst nodeAfterFiller = childNodes[ offset ];\n\n\tif ( isText( nodeAfterFiller ) ) {\n\t\tnodeAfterFiller.data = INLINE_FILLER + nodeAfterFiller.data;\n\n\t\treturn nodeAfterFiller;\n\t} else {\n\t\tconst fillerNode = domDocument.createTextNode( INLINE_FILLER );\n\n\t\tif ( Array.isArray( domParentOrArray ) ) {\n\t\t\tchildNodes.splice( offset, 0, fillerNode );\n\t\t} else {\n\t\t\tinsertAt( domParentOrArray, offset, fillerNode );\n\t\t}\n\n\t\treturn fillerNode;\n\t}\n}\n\n// Whether two DOM nodes should be considered as similar.\n// Nodes are considered similar if they have the same tag name.\n//\n// @private\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction areSimilar( node1, node2 ) {\n\treturn isNode( node1 ) && isNode( node2 ) &&\n\t\t!isText( node1 ) && !isText( node2 ) &&\n\t\tnode1.tagName.toLowerCase() === node2.tagName.toLowerCase();\n}\n\n// Whether two dom nodes should be considered as the same.\n// Two nodes which are considered the same are:\n//\n//\t\t* Text nodes with the same text.\n//\t\t* Element nodes represented by the same object.\n//\t\t* Two block filler elements.\n//\n// @private\n// @param {String} blockFillerMode Block filler mode, see {@link module:engine/view/domconverter~DomConverter#blockFillerMode}.\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction sameNodes( domConverter, actualDomChild, expectedDomChild ) {\n\t// Elements.\n\tif ( actualDomChild === expectedDomChild ) {\n\t\treturn true;\n\t}\n\t// Texts.\n\telse if ( isText( actualDomChild ) && isText( expectedDomChild ) ) {\n\t\treturn actualDomChild.data === expectedDomChild.data;\n\t}\n\t// Block fillers.\n\telse if ( domConverter.isBlockFiller( actualDomChild ) &&\n\t\tdomConverter.isBlockFiller( expectedDomChild ) ) {\n\t\treturn true;\n\t}\n\n\t// Not matching types.\n\treturn false;\n}\n\n// The following is a Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n// When the native DOM selection is at the end of the block and preceded by <br /> e.g.\n//\n//\t\t<p>foo<br/>[]</p>\n//\n// which happens a lot when using the soft line break, the browser fails to (visually) move the\n// caret to the new line. A quick fix is as simple as force–refreshing the selection with the same range.\nfunction fixGeckoSelectionAfterBr( focus, domSelection ) {\n\tconst parent = focus.parent;\n\n\t// This fix works only when the focus point is at the very end of an element.\n\t// There is no point in running it in cases unrelated to the browser bug.\n\tif ( parent.nodeType != Node.ELEMENT_NODE || focus.offset != parent.childNodes.length - 1 ) {\n\t\treturn;\n\t}\n\n\tconst childAtOffset = parent.childNodes[ focus.offset ];\n\n\t// To stay on the safe side, the fix being as specific as possible, it targets only the\n\t// selection which is at the very end of the element and preceded by <br />.\n\tif ( childAtOffset && childAtOffset.tagName == 'BR' ) {\n\t\tdomSelection.addRange( domSelection.getRangeAt( 0 ) );\n\t}\n}\n\nfunction filterOutFakeSelectionContainer( domChildList, fakeSelectionContainer ) {\n\tconst childList = Array.from( domChildList );\n\n\tif ( childList.length == 0 || !fakeSelectionContainer ) {\n\t\treturn childList;\n\t}\n\n\tconst last = childList[ childList.length - 1 ];\n\n\tif ( last == fakeSelectionContainer ) {\n\t\tchildList.pop();\n\t}\n\n\treturn childList;\n}\n\n// Creates a fake selection container for a given document.\n//\n// @private\n// @param {Document} domDocument\n// @returns {HTMLElement}\nfunction createFakeSelectionContainer( domDocument ) {\n\tconst container = domDocument.createElement( 'div' );\n\n\tObject.assign( container.style, {\n\t\tposition: 'fixed',\n\t\ttop: 0,\n\t\tleft: '-9999px',\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/752.\n\t\twidth: '42px'\n\t} );\n\n\t// Fill it with a text node so we can update it later.\n\tcontainer.textContent = '\\u00A0';\n\n\treturn container;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module utils/dom/global\n */\n\n/**\n * A helper (module) giving an access to the global DOM objects such as `window` and\n * `document`. Accessing these objects using this helper allows easy and bulletproof\n * testing, i.e. stubbing native properties:\n *\n *\t\timport global from 'ckeditor5/utils/dom/global.js';\n *\n *\t\t// This stub will work for any code using global module.\n *\t\ttestUtils.sinon.stub( global, 'window', {\n *\t\t\tinnerWidth: 10000\n *\t\t} );\n *\n *\t\tconsole.log( global.window.innerWidth );\n */\nexport default { window, document };\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/indexof\n */\n\n/**\n * Returns index of the node in the parent element.\n *\n * @param {Node} node Node which index is tested.\n * @returns {Number} Index of the node in the parent element. Returns 0 if node has no parent.\n */\nexport default function indexOf( node ) {\n\tlet index = 0;\n\n\twhile ( node.previousSibling ) {\n\t\tnode = node.previousSibling;\n\t\tindex++;\n\t}\n\n\treturn index;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module utils/dom/getancestors\n */\n\n/**\n * Returns all ancestors of given DOM node, starting from the top-most (root). Includes the given node itself. If the\n * node is a part of `DocumentFragment` that `DocumentFragment` will be returned. In contrary, if the node is\n * appended to a `Document`, that `Document` will not be returned (algorithms operating on DOM tree care for `Document#documentElement`\n * at most, which will be returned).\n *\n * @param {Node} node DOM node.\n * @returns {Array.<Node|DocumentFragment>} Array of given `node` parents.\n */\nexport default function getAncestors( node ) {\n\tconst nodes = [];\n\n\t// We are interested in `Node`s `DocumentFragment`s only.\n\twhile ( node && node.nodeType != Node.DOCUMENT_NODE ) {\n\t\tnodes.unshift( node );\n\t\tnode = node.parentNode;\n\t}\n\n\treturn nodes;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/domconverter\n */\n\n/* globals document, Node, NodeFilter, Text */\n\nimport ViewText from './text';\nimport ViewElement from './element';\nimport ViewPosition from './position';\nimport ViewRange from './range';\nimport ViewSelection from './selection';\nimport ViewDocumentFragment from './documentfragment';\nimport ViewTreeWalker from './treewalker';\nimport { BR_FILLER, getDataWithoutFiller, INLINE_FILLER_LENGTH, isInlineFiller, NBSP_FILLER, startsWithFiller } from './filler';\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport indexOf from '@ckeditor/ckeditor5-utils/src/dom/indexof';\nimport getAncestors from '@ckeditor/ckeditor5-utils/src/dom/getancestors';\nimport getCommonAncestor from '@ckeditor/ckeditor5-utils/src/dom/getcommonancestor';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport { isElement } from 'lodash-es';\n\n// eslint-disable-next-line new-cap\nconst BR_FILLER_REF = BR_FILLER( document );\n\n/**\n * DomConverter is a set of tools to do transformations between DOM nodes and view nodes. It also handles\n * {@link module:engine/view/domconverter~DomConverter#bindElements binding} these nodes.\n *\n * The instance of DOMConverter is available in {@link module:engine/view/view~View#domConverter `editor.editing.view.domConverter`}.\n *\n * DomConverter does not check which nodes should be rendered (use {@link module:engine/view/renderer~Renderer}), does not keep a\n * state of a tree nor keeps synchronization between tree view and DOM tree (use {@link module:engine/view/document~Document}).\n *\n * DomConverter keeps DOM elements to View element bindings, so when the converter will be destroyed, the binding will\n * be lost. Two converters will keep separate binding maps, so one tree view can be bound with two DOM trees.\n */\nexport default class DomConverter {\n\t/**\n\t * Creates DOM converter.\n\t *\n\t * @param {Object} options Object with configuration options.\n\t * @param {module:engine/view/filler~BlockFillerMode} [options.blockFillerMode='br'] The type of the block filler to use.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The mode of a block filler used by DOM converter.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'br'|'nbsp'} module:engine/view/domconverter~DomConverter#blockFillerMode\n\t\t */\n\t\tthis.blockFillerMode = options.blockFillerMode || 'br';\n\n\t\t/**\n\t\t * Elements which are considered pre-formatted elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>} module:engine/view/domconverter~DomConverter#preElements\n\t\t */\n\t\tthis.preElements = [ 'pre' ];\n\n\t\t/**\n\t\t * Elements which are considered block elements (and hence should be filled with a\n\t\t * {@link #isBlockFiller block filler}).\n\t\t *\n\t\t * Whether an element is considered a block element also affects handling of trailing whitespaces.\n\t\t *\n\t\t * You can extend this array if you introduce support for block elements which are not yet recognized here.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>} module:engine/view/domconverter~DomConverter#blockElements\n\t\t */\n\t\tthis.blockElements = [ 'p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'li', 'dd', 'dt', 'figcaption' ];\n\n\t\t/**\n\t\t * Block {@link module:engine/view/filler filler} creator, which is used to create all block fillers during the\n\t\t * view to DOM conversion and to recognize block fillers during the DOM to view conversion.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Function} module:engine/view/domconverter~DomConverter#_blockFiller\n\t\t */\n\t\tthis._blockFiller = this.blockFillerMode == 'br' ? BR_FILLER : NBSP_FILLER;\n\n\t\t/**\n\t\t * DOM to View mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_domToViewMapping\n\t\t */\n\t\tthis._domToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * View to DOM mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_viewToDomMapping\n\t\t */\n\t\tthis._viewToDomMapping = new WeakMap();\n\n\t\t/**\n\t\t * Holds mapping between fake selection containers and corresponding view selections.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_fakeSelectionMapping\n\t\t */\n\t\tthis._fakeSelectionMapping = new WeakMap();\n\t}\n\n\t/**\n\t * Binds given DOM element that represents fake selection to a **position** of a\n\t * {@link module:engine/view/documentselection~DocumentSelection document selection}.\n\t * Document selection copy is stored and can be retrieved by\n\t * {@link module:engine/view/domconverter~DomConverter#fakeSelectionToView} method.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @param {module:engine/view/documentselection~DocumentSelection} viewDocumentSelection\n\t */\n\tbindFakeSelection( domElement, viewDocumentSelection ) {\n\t\tthis._fakeSelectionMapping.set( domElement, new ViewSelection( viewDocumentSelection ) );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/view/selection~Selection view selection} instance corresponding to\n\t * given DOM element that represents fake selection. Returns `undefined` if binding to given DOM element does not exists.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @returns {module:engine/view/selection~Selection|undefined}\n\t */\n\tfakeSelectionToView( domElement ) {\n\t\treturn this._fakeSelectionMapping.get( domElement );\n\t}\n\n\t/**\n\t * Binds DOM and View elements, so it will be possible to get corresponding elements using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {HTMLElement} domElement DOM element to bind.\n\t * @param {module:engine/view/element~Element} viewElement View element to bind.\n\t */\n\tbindElements( domElement, viewElement ) {\n\t\tthis._domToViewMapping.set( domElement, viewElement );\n\t\tthis._viewToDomMapping.set( viewElement, domElement );\n\t}\n\n\t/**\n\t * Unbinds given `domElement` from the view element it was bound to. Unbinding is deep, meaning that all children of\n\t * `domElement` will be unbound too.\n\t *\n\t * @param {HTMLElement} domElement DOM element to unbind.\n\t */\n\tunbindDomElement( domElement ) {\n\t\tconst viewElement = this._domToViewMapping.get( domElement );\n\n\t\tif ( viewElement ) {\n\t\t\tthis._domToViewMapping.delete( domElement );\n\t\t\tthis._viewToDomMapping.delete( viewElement );\n\n\t\t\t// Use Array.from because of MS Edge (#923).\n\t\t\tfor ( const child of Array.from( domElement.childNodes ) ) {\n\t\t\t\tthis.unbindDomElement( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Binds DOM and View document fragments, so it will be possible to get corresponding document fragments using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {DocumentFragment} domFragment DOM document fragment to bind.\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment View document fragment to bind.\n\t */\n\tbindDocumentFragments( domFragment, viewFragment ) {\n\t\tthis._domToViewMapping.set( domFragment, viewFragment );\n\t\tthis._viewToDomMapping.set( viewFragment, domFragment );\n\t}\n\n\t/**\n\t * Converts view to DOM. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View node or document fragment to transform.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @returns {Node|DocumentFragment} Converted node or DocumentFragment.\n\t */\n\tviewToDom( viewNode, domDocument, options = {} ) {\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tconst textData = this._processDataFromViewText( viewNode );\n\n\t\t\treturn domDocument.createTextNode( textData );\n\t\t} else {\n\t\t\tif ( this.mapViewToDom( viewNode ) ) {\n\t\t\t\treturn this.mapViewToDom( viewNode );\n\t\t\t}\n\n\t\t\tlet domElement;\n\n\t\t\tif ( viewNode.is( 'documentFragment' ) ) {\n\t\t\t\t// Create DOM document fragment.\n\t\t\t\tdomElement = domDocument.createDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domElement, viewNode );\n\t\t\t\t}\n\t\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\t\t// UIElement has its own render() method (see #799).\n\t\t\t\tdomElement = viewNode.render( domDocument );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\treturn domElement;\n\t\t\t} else {\n\t\t\t\t// Create DOM element.\n\t\t\t\tif ( viewNode.hasAttribute( 'xmlns' ) ) {\n\t\t\t\t\tdomElement = domDocument.createElementNS( viewNode.getAttribute( 'xmlns' ), viewNode.name );\n\t\t\t\t} else {\n\t\t\t\t\tdomElement = domDocument.createElement( viewNode.name );\n\t\t\t\t}\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tfor ( const key of viewNode.getAttributeKeys() ) {\n\t\t\t\t\tdomElement.setAttribute( key, viewNode.getAttribute( key ) );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.viewChildrenToDom( viewNode, domDocument, options ) ) {\n\t\t\t\t\tdomElement.appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn domElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the view element to DOM using the\n\t * {@link module:engine/view/domconverter~DomConverter#viewToDom} method.\n\t * Additionally, this method adds block {@link module:engine/view/filler filler} to the list of children, if needed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElement Parent view element.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#viewToDom} options parameter.\n\t * @returns {Iterable.<Node>} DOM nodes.\n\t */\n\t* viewChildrenToDom( viewElement, domDocument, options = {} ) {\n\t\tconst fillerPositionOffset = viewElement.getFillerOffset && viewElement.getFillerOffset();\n\t\tlet offset = 0;\n\n\t\tfor ( const childView of viewElement.getChildren() ) {\n\t\t\tif ( fillerPositionOffset === offset ) {\n\t\t\t\tyield this._blockFiller( domDocument );\n\t\t\t}\n\n\t\t\tyield this.viewToDom( childView, domDocument, options );\n\n\t\t\toffset++;\n\t\t}\n\n\t\tif ( fillerPositionOffset === offset ) {\n\t\t\tyield this._blockFiller( domDocument );\n\t\t}\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/range~Range} to DOM range.\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {Range} DOM range.\n\t */\n\tviewRangeToDom( viewRange ) {\n\t\tconst domStart = this.viewPositionToDom( viewRange.start );\n\t\tconst domEnd = this.viewPositionToDom( viewRange.end );\n\n\t\tconst domRange = document.createRange();\n\t\tdomRange.setStart( domStart.parent, domStart.offset );\n\t\tdomRange.setEnd( domEnd.parent, domEnd.offset );\n\n\t\treturn domRange;\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/position~Position} to DOM parent and offset.\n\t *\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t * If the converted position is directly before inline filler it is moved inside the filler.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {Object|null} position DOM position or `null` if view position could not be converted to DOM.\n\t * @returns {Node} position.parent DOM position parent.\n\t * @returns {Number} position.offset DOM position offset.\n\t */\n\tviewPositionToDom( viewPosition ) {\n\t\tconst viewParent = viewPosition.parent;\n\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\tconst domParent = this.findCorrespondingDomText( viewParent );\n\n\t\t\tif ( !domParent ) {\n\t\t\t\t// Position is in a view text node that has not been rendered to DOM yet.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tlet offset = viewPosition.offset;\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset += INLINE_FILLER_LENGTH;\n\t\t\t}\n\n\t\t\treturn { parent: domParent, offset };\n\t\t} else {\n\t\t\t// viewParent is instance of ViewElement.\n\t\t\tlet domParent, domBefore, domAfter;\n\n\t\t\tif ( viewPosition.offset === 0 ) {\n\t\t\t\tdomParent = this.mapViewToDom( viewParent );\n\n\t\t\t\tif ( !domParent ) {\n\t\t\t\t\t// Position is in a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomAfter = domParent.childNodes[ 0 ];\n\t\t\t} else {\n\t\t\t\tconst nodeBefore = viewPosition.nodeBefore;\n\n\t\t\t\tdomBefore = nodeBefore.is( 'text' ) ?\n\t\t\t\t\tthis.findCorrespondingDomText( nodeBefore ) :\n\t\t\t\t\tthis.mapViewToDom( viewPosition.nodeBefore );\n\n\t\t\t\tif ( !domBefore ) {\n\t\t\t\t\t// Position is after a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomParent = domBefore.parentNode;\n\t\t\t\tdomAfter = domBefore.nextSibling;\n\t\t\t}\n\n\t\t\t// If there is an inline filler at position return position inside the filler. We should never return\n\t\t\t// the position before the inline filler.\n\t\t\tif ( isText( domAfter ) && startsWithFiller( domAfter ) ) {\n\t\t\t\treturn { parent: domAfter, offset: INLINE_FILLER_LENGTH };\n\t\t\t}\n\n\t\t\tconst offset = domBefore ? indexOf( domBefore ) + 1 : 0;\n\n\t\t\treturn { parent: domParent, offset };\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM to view. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items. For\n\t * {@link module:engine/view/filler fillers} `null` will be returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {Node|DocumentFragment} domNode DOM node or document fragment to transform.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @param {Boolean} [options.keepOriginalCase=false] If `false`, node's tag name will be converter to lower case.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} Converted node or document fragment\n\t * or `null` if DOM node is a {@link module:engine/view/filler filler} or the given node is an empty text node.\n\t */\n\tdomToView( domNode, options = {} ) {\n\t\tif ( this.isBlockFiller( domNode, this.blockFillerMode ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When node is inside UIElement return that UIElement as it's view representation.\n\t\tconst uiElement = this.getParentUIElement( domNode, this._domToViewMapping );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tif ( isText( domNode ) ) {\n\t\t\tif ( isInlineFiller( domNode ) ) {\n\t\t\t\treturn null;\n\t\t\t} else {\n\t\t\t\tconst textData = this._processDataFromDomText( domNode );\n\n\t\t\t\treturn textData === '' ? null : new ViewText( textData );\n\t\t\t}\n\t\t} else if ( this.isComment( domNode ) ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\tif ( this.mapDomToView( domNode ) ) {\n\t\t\t\treturn this.mapDomToView( domNode );\n\t\t\t}\n\n\t\t\tlet viewElement;\n\n\t\t\tif ( this.isDocumentFragment( domNode ) ) {\n\t\t\t\t// Create view document fragment.\n\t\t\t\tviewElement = new ViewDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domNode, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Create view element.\n\t\t\t\tconst viewName = options.keepOriginalCase ? domNode.tagName : domNode.tagName.toLowerCase();\n\t\t\t\tviewElement = new ViewElement( viewName );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domNode, viewElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tconst attrs = domNode.attributes;\n\n\t\t\t\tfor ( let i = attrs.length - 1; i >= 0; i-- ) {\n\t\t\t\t\tviewElement._setAttribute( attrs[ i ].name, attrs[ i ].value );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.domChildrenToView( domNode, options ) ) {\n\t\t\t\t\tviewElement._appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn viewElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the DOM element to view nodes using\n\t * the {@link module:engine/view/domconverter~DomConverter#domToView} method.\n\t * Additionally this method omits block {@link module:engine/view/filler filler}, if it exists in the DOM parent.\n\t *\n\t * @param {HTMLElement} domElement Parent DOM element.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#domToView} options parameter.\n\t * @returns {Iterable.<module:engine/view/node~Node>} View nodes.\n\t */\n\t* domChildrenToView( domElement, options = {} ) {\n\t\tfor ( let i = 0; i < domElement.childNodes.length; i++ ) {\n\t\t\tconst domChild = domElement.childNodes[ i ];\n\t\t\tconst viewChild = this.domToView( domChild, options );\n\n\t\t\tif ( viewChild !== null ) {\n\t\t\t\tyield viewChild;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM selection to view {@link module:engine/view/selection~Selection}.\n\t * Ranges which cannot be converted will be omitted.\n\t *\n\t * @param {Selection} domSelection DOM selection.\n\t * @returns {module:engine/view/selection~Selection} View selection.\n\t */\n\tdomSelectionToView( domSelection ) {\n\t\t// DOM selection might be placed in fake selection container.\n\t\t// If container contains fake selection - return corresponding view selection.\n\t\tif ( domSelection.rangeCount === 1 ) {\n\t\t\tlet container = domSelection.getRangeAt( 0 ).startContainer;\n\n\t\t\t// The DOM selection might be moved to the text node inside the fake selection container.\n\t\t\tif ( isText( container ) ) {\n\t\t\t\tcontainer = container.parentNode;\n\t\t\t}\n\n\t\t\tconst viewSelection = this.fakeSelectionToView( container );\n\n\t\t\tif ( viewSelection ) {\n\t\t\t\treturn viewSelection;\n\t\t\t}\n\t\t}\n\n\t\tconst isBackward = this.isDomSelectionBackward( domSelection );\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( let i = 0; i < domSelection.rangeCount; i++ ) {\n\t\t\t// DOM Range have correct start and end, no matter what is the DOM Selection direction. So we don't have to fix anything.\n\t\t\tconst domRange = domSelection.getRangeAt( i );\n\t\t\tconst viewRange = this.domRangeToView( domRange );\n\n\t\t\tif ( viewRange ) {\n\t\t\t\tviewRanges.push( viewRange );\n\t\t\t}\n\t\t}\n\n\t\treturn new ViewSelection( viewRanges, { backward: isBackward } );\n\t}\n\n\t/**\n\t * Converts DOM Range to view {@link module:engine/view/range~Range}.\n\t * If the start or end position can not be converted `null` is returned.\n\t *\n\t * @param {Range} domRange DOM range.\n\t * @returns {module:engine/view/range~Range|null} View range.\n\t */\n\tdomRangeToView( domRange ) {\n\t\tconst viewStart = this.domPositionToView( domRange.startContainer, domRange.startOffset );\n\t\tconst viewEnd = this.domPositionToView( domRange.endContainer, domRange.endOffset );\n\n\t\tif ( viewStart && viewEnd ) {\n\t\t\treturn new ViewRange( viewStart, viewEnd );\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Converts DOM parent and offset to view {@link module:engine/view/position~Position}.\n\t *\n\t * If the position is inside a {@link module:engine/view/filler filler} which has no corresponding view node,\n\t * position of the filler will be converted and returned.\n\t *\n\t * If the position is inside DOM element rendered by {@link module:engine/view/uielement~UIElement}\n\t * that position will be converted to view position before that UIElement.\n\t *\n\t * If structures are too different and it is not possible to find corresponding position then `null` will be returned.\n\t *\n\t * @param {Node} domParent DOM position parent.\n\t * @param {Number} domOffset DOM position offset.\n\t * @returns {module:engine/view/position~Position} viewPosition View position.\n\t */\n\tdomPositionToView( domParent, domOffset ) {\n\t\tif ( this.isBlockFiller( domParent, this.blockFillerMode ) ) {\n\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t}\n\n\t\t// If position is somewhere inside UIElement - return position before that element.\n\t\tconst viewElement = this.mapDomToView( domParent );\n\n\t\tif ( viewElement && viewElement.is( 'uiElement' ) ) {\n\t\t\treturn ViewPosition._createBefore( viewElement );\n\t\t}\n\n\t\tif ( isText( domParent ) ) {\n\t\t\tif ( isInlineFiller( domParent ) ) {\n\t\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t\t}\n\n\t\t\tconst viewParent = this.findCorrespondingViewText( domParent );\n\t\t\tlet offset = domOffset;\n\n\t\t\tif ( !viewParent ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset -= INLINE_FILLER_LENGTH;\n\t\t\t\toffset = offset < 0 ? 0 : offset;\n\t\t\t}\n\n\t\t\treturn new ViewPosition( viewParent, offset );\n\t\t}\n\t\t// domParent instanceof HTMLElement.\n\t\telse {\n\t\t\tif ( domOffset === 0 ) {\n\t\t\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t\t\tif ( viewParent ) {\n\t\t\t\t\treturn new ViewPosition( viewParent, 0 );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst domBefore = domParent.childNodes[ domOffset - 1 ];\n\t\t\t\tconst viewBefore = isText( domBefore ) ?\n\t\t\t\t\tthis.findCorrespondingViewText( domBefore ) :\n\t\t\t\t\tthis.mapDomToView( domBefore );\n\n\t\t\t\t// TODO #663\n\t\t\t\tif ( viewBefore && viewBefore.parent ) {\n\t\t\t\t\treturn new ViewPosition( viewBefore.parent, viewBefore.index + 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Returns corresponding view {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment} for provided DOM element or\n\t * document fragment. If there is no view item {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * to the given DOM - `undefined` is returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {DocumentFragment|Element} domElementOrDocumentFragment DOM element or document fragment.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|undefined}\n\t * Corresponding view element, document fragment or `undefined` if no element was bound.\n\t */\n\tmapDomToView( domElementOrDocumentFragment ) {\n\t\treturn this.getParentUIElement( domElementOrDocumentFragment ) || this._domToViewMapping.get( domElementOrDocumentFragment );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * For all text nodes rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * Note that for the block or inline {@link module:engine/view/filler filler} this method returns `null`.\n\t *\n\t * @param {Text} domText DOM text node.\n\t * @returns {module:engine/view/text~Text|null} Corresponding view text node or `null`, if it was not possible to find a\n\t * corresponding node.\n\t */\n\tfindCorrespondingViewText( domText ) {\n\t\tif ( isInlineFiller( domText ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// If DOM text was rendered by UIElement - return that element.\n\t\tconst uiElement = this.getParentUIElement( domText );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tconst previousSibling = domText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling ) {\n\t\t\tif ( !( this.isElement( previousSibling ) ) ) {\n\t\t\t\t// The previous is text or comment.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewElement = this.mapDomToView( previousSibling );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst nextSibling = viewElement.nextSibling;\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( nextSibling instanceof ViewText ) {\n\t\t\t\t\treturn viewElement.nextSibling;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t// Try to use parent to find the corresponding text node.\n\t\telse {\n\t\t\tconst viewElement = this.mapDomToView( domText.parentNode );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst firstChild = viewElement.getChild( 0 );\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( firstChild instanceof ViewText ) {\n\t\t\t\t\treturn firstChild;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns corresponding DOM item for provided {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment}.\n\t * To find a corresponding text for {@link module:engine/view/text~Text view Text instance}\n\t * use {@link #findCorrespondingDomText}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View element or document fragment.\n\t * @returns {Node|DocumentFragment|undefined} Corresponding DOM node or document fragment.\n\t */\n\tmapViewToDom( documentFragmentOrElement ) {\n\t\treturn this._viewToDomMapping.get( documentFragmentOrElement );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} viewText View text node.\n\t * @returns {Text|null} Corresponding DOM text node or `null`, if it was not possible to find a corresponding node.\n\t */\n\tfindCorrespondingDomText( viewText ) {\n\t\tconst previousSibling = viewText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling && this.mapViewToDom( previousSibling ) ) {\n\t\t\treturn this.mapViewToDom( previousSibling ).nextSibling;\n\t\t}\n\n\t\t// If this is a first node, try to use parent to find the corresponding text node.\n\t\tif ( !previousSibling && viewText.parent && this.mapViewToDom( viewText.parent ) ) {\n\t\t\treturn this.mapViewToDom( viewText.parent ).childNodes[ 0 ];\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Focuses DOM editable that is corresponding to provided {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t * @param {module:engine/view/editableelement~EditableElement} viewEditable\n\t */\n\tfocus( viewEditable ) {\n\t\tconst domEditable = this.mapViewToDom( viewEditable );\n\n\t\tif ( domEditable && domEditable.ownerDocument.activeElement !== domEditable ) {\n\t\t\t// Save the scrollX and scrollY positions before the focus.\n\t\t\tconst { scrollX, scrollY } = global.window;\n\t\t\tconst scrollPositions = [];\n\n\t\t\t// Save all scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst { scrollLeft, scrollTop } = node;\n\n\t\t\t\tscrollPositions.push( [ scrollLeft, scrollTop ] );\n\t\t\t} );\n\n\t\t\tdomEditable.focus();\n\n\t\t\t// Restore scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/957\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst [ scrollLeft, scrollTop ] = scrollPositions.shift();\n\n\t\t\t\tnode.scrollLeft = scrollLeft;\n\t\t\t\tnode.scrollTop = scrollTop;\n\t\t\t} );\n\n\t\t\t// Restore the scrollX and scrollY positions after the focus.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\tglobal.window.scrollTo( scrollX, scrollY );\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.ELEMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisElement( node ) {\n\t\treturn node && node.nodeType == Node.ELEMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.DOCUMENT_FRAGMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisDocumentFragment( node ) {\n\t\treturn node && node.nodeType == Node.DOCUMENT_FRAGMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.COMMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisComment( node ) {\n\t\treturn node && node.nodeType == Node.COMMENT_NODE;\n\t}\n\n\t/**\n\t * Checks if the node is an instance of the block filler for this DOM converter.\n\t *\n\t *\t\tconst converter = new DomConverter( { blockFillerMode: 'br' } );\n\t *\n\t *\t\tconverter.isBlockFiller( BR_FILLER( document ) ); // true\n\t *\t\tconverter.isBlockFiller( NBSP_FILLER( document ) ); // false\n\t *\n\t * **Note:**: For the `'nbsp'` mode the method also checks context of a node so it cannot be a detached node.\n\t *\n\t * **Note:** A special case in the `'nbsp'` mode exists where the `<br>` in `<p><br></p>` is treated as a block filler.\n\t *\n\t * @param {Node} domNode DOM node to check.\n\t * @returns {Boolean} True if a node is considered a block filler for given mode.\n\t */\n\tisBlockFiller( domNode ) {\n\t\tif ( this.blockFillerMode == 'br' ) {\n\t\t\treturn domNode.isEqualNode( BR_FILLER_REF );\n\t\t}\n\n\t\t// Special case for <p><br></p> in which case the <br> should be treated as filler even\n\t\t// when we're in the 'nbsp' mode. See ckeditor5#5564.\n\t\tif ( domNode.tagName === 'BR' && hasBlockParent( domNode, this.blockElements ) && domNode.parentNode.childNodes.length === 1 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn isNbspBlockFiller( domNode, this.blockElements );\n\t}\n\n\t/**\n\t * Returns `true` if given selection is a backward selection, that is, if it's `focus` is before `anchor`.\n\t *\n\t * @param {Selection} DOM Selection instance to check.\n\t * @returns {Boolean}\n\t */\n\tisDomSelectionBackward( selection ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Since it takes multiple lines of code to check whether a \"DOM Position\" is before/after another \"DOM Position\",\n\t\t// we will use the fact that range will collapse if it's end is before it's start.\n\t\tconst range = document.createRange();\n\n\t\trange.setStart( selection.anchorNode, selection.anchorOffset );\n\t\trange.setEnd( selection.focusNode, selection.focusOffset );\n\n\t\tconst backward = range.collapsed;\n\n\t\trange.detach();\n\n\t\treturn backward;\n\t}\n\n\t/**\n\t * Returns parent {@link module:engine/view/uielement~UIElement} for provided DOM node. Returns `null` if there is no\n\t * parent UIElement.\n\t *\n\t * @param {Node} domNode\n\t * @returns {module:engine/view/uielement~UIElement|null}\n\t */\n\tgetParentUIElement( domNode ) {\n\t\tconst ancestors = getAncestors( domNode );\n\n\t\t// Remove domNode from the list.\n\t\tancestors.pop();\n\n\t\twhile ( ancestors.length ) {\n\t\t\tconst domNode = ancestors.pop();\n\t\t\tconst viewNode = this._domToViewMapping.get( domNode );\n\n\t\t\tif ( viewNode && viewNode.is( 'uiElement' ) ) {\n\t\t\t\treturn viewNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks if given selection's boundaries are at correct places.\n\t *\n\t * The following places are considered as incorrect for selection boundaries:\n\t * * before or in the middle of the inline filler sequence,\n\t * * inside the DOM element which represents {@link module:engine/view/uielement~UIElement a view ui element}.\n\t *\n\t * @param {Selection} domSelection DOM Selection object to be checked.\n\t * @returns {Boolean} `true` if the given selection is at a correct place, `false` otherwise.\n\t */\n\tisDomSelectionCorrect( domSelection ) {\n\t\treturn this._isDomSelectionPositionCorrect( domSelection.anchorNode, domSelection.anchorOffset ) &&\n\t\t\tthis._isDomSelectionPositionCorrect( domSelection.focusNode, domSelection.focusOffset );\n\t}\n\n\t/**\n\t * Checks if the given DOM position is a correct place for selection boundary. See {@link #isDomSelectionCorrect}.\n\t *\n\t * @private\n\t * @param {Element} domParent Position parent.\n\t * @param {Number} offset Position offset.\n\t * @returns {Boolean} `true` if given position is at a correct place for selection boundary, `false` otherwise.\n\t */\n\t_isDomSelectionPositionCorrect( domParent, offset ) {\n\t\t// If selection is before or in the middle of inline filler string, it is incorrect.\n\t\tif ( isText( domParent ) && startsWithFiller( domParent ) && offset < INLINE_FILLER_LENGTH ) {\n\t\t\t// Selection in a text node, at wrong position (before or in the middle of filler).\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isElement( domParent ) && startsWithFiller( domParent.childNodes[ offset ] ) ) {\n\t\t\t// Selection in an element node, before filler text node.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t// If selection is in `view.UIElement`, it is incorrect. Note that `mapDomToView()` returns `view.UIElement`\n\t\t// also for any dom element that is inside the view ui element (so we don't need to perform any additional checks).\n\t\tif ( viewParent && viewParent.is( 'uiElement' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Takes text data from a given {@link module:engine/view/text~Text#data} and processes it so\n\t * it is correctly displayed in the DOM.\n\t *\n\t * Following changes are done:\n\t *\n\t * * a space at the beginning is changed to ` ` if this is the first text node in its container\n\t * element or if a previous text node ends with a space character,\n\t * * space at the end of the text node is changed to ` ` if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container,\n\t * * remaining spaces are replaced to a chain of spaces and ` ` (e.g. `'x x'` becomes `'x   x'`).\n\t *\n\t * Content of {@link #preElements} is not processed.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node View text node to process.\n\t * @returns {String} Processed text data.\n\t */\n\t_processDataFromViewText( node ) {\n\t\tlet data = node.data;\n\n\t\t// If any of node ancestors has a name which is in `preElements` array, then currently processed\n\t\t// view text node is (will be) in preformatted element. We should not change whitespaces then.\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn data;\n\t\t}\n\n\t\t// 1. Replace the first space with a nbsp if the previous node ends with a space or there is no previous node\n\t\t// (container element boundary).\n\t\tif ( data.charAt( 0 ) == ' ' ) {\n\t\t\tconst prevNode = this._getTouchingViewTextNode( node, false );\n\t\t\tconst prevEndsWithSpace = prevNode && this._nodeEndsWithSpace( prevNode );\n\n\t\t\tif ( prevEndsWithSpace || !prevNode ) {\n\t\t\t\tdata = '\\u00A0' + data.substr( 1 );\n\t\t\t}\n\t\t}\n\n\t\t// 2. Replace the last space with nbsp if there are two spaces at the end or if the next node starts with space or there is no\n\t\t// next node (container element boundary).\n\t\t//\n\t\t// Keep in mind that Firefox prefers $nbsp; before tag, not inside it:\n\t\t//\n\t\t// Foo <span> bar</span> <-- bad.\n\t\t// Foo <span> bar</span> <-- good.\n\t\t//\n\t\t// More here: https://github.com/ckeditor/ckeditor5-engine/issues/1747.\n\t\tif ( data.charAt( data.length - 1 ) == ' ' ) {\n\t\t\tconst nextNode = this._getTouchingViewTextNode( node, true );\n\n\t\t\tif ( data.charAt( data.length - 2 ) == ' ' || !nextNode || nextNode.data.charAt( 0 ) == ' ' ) {\n\t\t\t\tdata = data.substr( 0, data.length - 1 ) + '\\u00A0';\n\t\t\t}\n\t\t}\n\n\t\t// 3. Create space+nbsp pairs.\n\t\treturn data.replace( / {2}/g, ' \\u00A0' );\n\t}\n\n\t/**\n\t * Checks whether given node ends with a space character after changing appropriate space characters to ` `s.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node Node to check.\n\t * @returns {Boolean} `true` if given `node` ends with space, `false` otherwise.\n\t */\n\t_nodeEndsWithSpace( node ) {\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst data = this._processDataFromViewText( node );\n\n\t\treturn data.charAt( data.length - 1 ) == ' ';\n\t}\n\n\t/**\n\t * Takes text data from native `Text` node and processes it to a correct {@link module:engine/view/text~Text view text node} data.\n\t *\n\t * Following changes are done:\n\t *\n\t * * multiple whitespaces are replaced to a single space,\n\t * * space at the beginning of a text node is removed if it is the first text node in its container\n\t * element or if the previous text node ends with a space character,\n\t * * space at the end of the text node is removed if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container\n\t * * nbsps are converted to spaces.\n\t *\n\t * @param {Node} node DOM text node to process.\n\t * @returns {String} Processed data.\n\t * @private\n\t */\n\t_processDataFromDomText( node ) {\n\t\tlet data = node.data;\n\n\t\tif ( _hasDomParentOfType( node, this.preElements ) ) {\n\t\t\treturn getDataWithoutFiller( node );\n\t\t}\n\n\t\t// Change all consecutive whitespace characters (from the [ \\n\\t\\r] set –\n\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/822#issuecomment-311670249) to a single space character.\n\t\t// That's how multiple whitespaces are treated when rendered, so we normalize those whitespaces.\n\t\t// We're replacing 1+ (and not 2+) to also normalize singular \\n\\t\\r characters (#822).\n\t\tdata = data.replace( /[ \\n\\t\\r]{1,}/g, ' ' );\n\n\t\tconst prevNode = this._getTouchingInlineDomNode( node, false );\n\t\tconst nextNode = this._getTouchingInlineDomNode( node, true );\n\n\t\tconst shouldLeftTrim = this._checkShouldLeftTrimDomText( prevNode );\n\t\tconst shouldRightTrim = this._checkShouldRightTrimDomText( node, nextNode );\n\n\t\t// If the previous dom text node does not exist or it ends by whitespace character, remove space character from the beginning\n\t\t// of this text node. Such space character is treated as a whitespace.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^ /, '' );\n\t\t}\n\n\t\t// If the next text node does not exist remove space character from the end of this text node.\n\t\tif ( shouldRightTrim ) {\n\t\t\tdata = data.replace( / $/, '' );\n\t\t}\n\n\t\t// At the beginning and end of a block element, Firefox inserts normal space + <br> instead of non-breaking space.\n\t\t// This means that the text node starts/end with normal space instead of non-breaking space.\n\t\t// This causes a problem because the normal space would be removed in `.replace` calls above. To prevent that,\n\t\t// the inline filler is removed only after the data is initially processed (by the `.replace` above). See ckeditor5#692.\n\t\tdata = getDataWithoutFiller( new Text( data ) );\n\n\t\t// At this point we should have removed all whitespaces from DOM text data.\n\t\t//\n\t\t// Now, We will reverse the process that happens in `_processDataFromViewText`.\n\t\t//\n\t\t// We have to change   chars, that were in DOM text data because of rendering reasons, to spaces.\n\t\t// First, change all ` \\u00A0` pairs (space +  ) to two spaces. DOM converter changes two spaces from model/view to\n\t\t// ` \\u00A0` to ensure proper rendering. Since here we convert back, we recognize those pairs and change them back to ` `.\n\t\tdata = data.replace( / \\u00A0/g, ' ' );\n\n\t\t// Then, let's change the last nbsp to a space.\n\t\tif ( /( |\\u00A0)\\u00A0$/.test( data ) || !nextNode || ( nextNode.data && nextNode.data.charAt( 0 ) == ' ' ) ) {\n\t\t\tdata = data.replace( /\\u00A0$/, ' ' );\n\t\t}\n\n\t\t// Then, change   character that is at the beginning of the text node to space character.\n\t\t// We do that replacement only if this is the first node or the previous node ends on whitespace character.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^\\u00A0/, ' ' );\n\t\t}\n\n\t\t// At this point, all whitespaces should be removed and all   created for rendering reasons should be\n\t\t// changed to normal space. All left   are   inserted intentionally.\n\t\treturn data;\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, preceded by the given `prevNode` should\n\t * be trimmed from the left side.\n\t *\n\t * @param {Node} prevNode\n\t */\n\t_checkShouldLeftTrimDomText( prevNode ) {\n\t\tif ( !prevNode ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( isElement( prevNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn /[^\\S\\u00A0]/.test( prevNode.data.charAt( prevNode.data.length - 1 ) );\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, succeeded by the given `nextNode` should\n\t * be trimmed from the right side.\n\t *\n\t * @param {Node} node\n\t * @param {Node} nextNode\n\t */\n\t_checkShouldRightTrimDomText( node, nextNode ) {\n\t\tif ( nextNode ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !startsWithFiller( node );\n\t}\n\n\t/**\n\t * Helper function. For given {@link module:engine/view/text~Text view text node}, it finds previous or next sibling\n\t * that is contained in the same container element. If there is no such sibling, `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} node Reference node.\n\t * @param {Boolean} getNext\n\t * @returns {module:engine/view/text~Text|null} Touching text node or `null` if there is no next or previous touching text node.\n\t */\n\t_getTouchingViewTextNode( node, getNext ) {\n\t\tconst treeWalker = new ViewTreeWalker( {\n\t\t\tstartPosition: getNext ? ViewPosition._createAfter( node ) : ViewPosition._createBefore( node ),\n\t\t\tdirection: getNext ? 'forward' : 'backward'\n\t\t} );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\t// ViewContainerElement is found on a way to next ViewText node, so given `node` was first/last\n\t\t\t// text node in its container element.\n\t\t\tif ( value.item.is( 'containerElement' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// <br> found – it works like a block boundary, so do not scan further.\n\t\t\telse if ( value.item.is( 'br' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// Found a text node in the same container element.\n\t\t\telse if ( value.item.is( 'textProxy' ) ) {\n\t\t\t\treturn value.item;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Helper function. For the given text node, it finds the closest touching node which is either\n\t * a text node or a `<br>`. The search is terminated at block element boundaries and if a matching node\n\t * wasn't found so far, `null` is returned.\n\t *\n\t * In the following DOM structure:\n\t *\n\t *\t\t<p>foo<b>bar</b><br>bom</p>\n\t *\n\t * * `foo` doesn't have its previous touching inline node (`null` is returned),\n\t * * `foo`'s next touching inline node is `bar`\n\t * * `bar`'s next touching inline node is `<br>`\n\t *\n\t * This method returns text nodes and `<br>` elements because these types of nodes affect how\n\t * spaces in the given text node need to be converted.\n\t *\n\t * @private\n\t * @param {Text} node\n\t * @param {Boolean} getNext\n\t * @returns {Text|Element|null}\n\t */\n\t_getTouchingInlineDomNode( node, getNext ) {\n\t\tif ( !node.parentNode ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst direction = getNext ? 'nextNode' : 'previousNode';\n\t\tconst document = node.ownerDocument;\n\t\tconst topmostParent = getAncestors( node )[ 0 ];\n\n\t\tconst treeWalker = document.createTreeWalker( topmostParent, NodeFilter.SHOW_TEXT | NodeFilter.SHOW_ELEMENT, {\n\t\t\tacceptNode( node ) {\n\t\t\t\tif ( isText( node ) ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\tif ( node.tagName == 'BR' ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\treturn NodeFilter.FILTER_SKIP;\n\t\t\t}\n\t\t} );\n\n\t\ttreeWalker.currentNode = node;\n\n\t\tconst touchingNode = treeWalker[ direction ]();\n\n\t\tif ( touchingNode !== null ) {\n\t\t\tconst lca = getCommonAncestor( node, touchingNode );\n\n\t\t\t// If there is common ancestor between the text node and next/prev text node,\n\t\t\t// and there are no block elements on a way from the text node to that ancestor,\n\t\t\t// and there are no block elements on a way from next/prev text node to that ancestor...\n\t\t\tif (\n\t\t\t\tlca &&\n\t\t\t\t!_hasDomParentOfType( node, this.blockElements, lca ) &&\n\t\t\t\t!_hasDomParentOfType( touchingNode, this.blockElements, lca )\n\t\t\t) {\n\t\t\t\t// Then they are in the same container element.\n\t\t\t\treturn touchingNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n// Helper function.\n// Used to check if given native `Element` or `Text` node has parent with tag name from `types` array.\n//\n// @param {Node} node\n// @param {Array.<String>} types\n// @param {Boolean} [boundaryParent] Can be given if parents should be checked up to a given element (excluding that element).\n// @returns {Boolean} `true` if such parent exists or `false` if it does not.\nfunction _hasDomParentOfType( node, types, boundaryParent ) {\n\tlet parents = getAncestors( node );\n\n\tif ( boundaryParent ) {\n\t\tparents = parents.slice( parents.indexOf( boundaryParent ) + 1 );\n\t}\n\n\treturn parents.some( parent => parent.tagName && types.includes( parent.tagName.toLowerCase() ) );\n}\n\n// A helper that executes given callback for each DOM node's ancestor, starting from the given node\n// and ending in document#documentElement.\n//\n// @param {Node} node\n// @param {Function} callback A callback to be executed for each ancestor.\nfunction forEachDomNodeAncestor( node, callback ) {\n\twhile ( node && node != global.document ) {\n\t\tcallback( node );\n\t\tnode = node.parentNode;\n\t}\n}\n\n// Checks if given node is a nbsp block filler.\n//\n// A   is a block filler only if it is a single child of a block element.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction isNbspBlockFiller( domNode, blockElements ) {\n\tconst isNBSP = isText( domNode ) && domNode.data == '\\u00A0';\n\n\treturn isNBSP && hasBlockParent( domNode, blockElements ) && domNode.parentNode.childNodes.length === 1;\n}\n\n// Checks if domNode has block parent.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction hasBlockParent( domNode, blockElements ) {\n\tconst parent = domNode.parentNode;\n\n\treturn parent && parent.tagName && blockElements.includes( parent.tagName.toLowerCase() );\n}\n\n/**\n * Enum representing type of the block filler.\n *\n * Possible values:\n *\n * * `br` - for `<br>` block filler used in editing view,\n * * `nbsp` - for ` ` block fillers used in the data.\n *\n * @typedef {String} module:engine/view/filler~BlockFillerMode\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getcommonancestor\n */\n\nimport getAncestors from './getancestors';\n\n/**\n * Searches and returns the lowest common ancestor of two given nodes.\n *\n * @param {Node} nodeA First node.\n * @param {Node} nodeB Second node.\n * @returns {Node|DocumentFragment|Document|null} Lowest common ancestor of both nodes or `null` if nodes do not have a common ancestor.\n */\nexport default function getCommonAncestor( nodeA, nodeB ) {\n\tconst ancestorsA = getAncestors( nodeA );\n\tconst ancestorsB = getAncestors( nodeB );\n\n\tlet i = 0;\n\n\t// It does not matter which array is shorter.\n\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\ti++;\n\t}\n\n\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/iswindow\n */\n\n/**\n * Checks if the object is a native DOM Window.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isWindow( obj ) {\n\tconst stringifiedObject = Object.prototype.toString.apply( obj );\n\n\t// Returns `true` for the `window` object in browser environments.\n\tif ( stringifiedObject == '[object Window]' ) {\n\t\treturn true;\n\t}\n\n\t// Returns `true` for the `window` object in the Electron environment.\n\tif ( stringifiedObject == '[object global]' ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/emittermixin\n */\n\nimport { default as EmitterMixin, _getEmitterListenedTo, _setEmitterId } from '../emittermixin';\nimport uid from '../uid';\nimport isNode from './isnode';\nimport isWindow from './iswindow';\nimport { extend } from 'lodash-es';\n\n/**\n * Mixin that injects the DOM events API into its host. It provides the API\n * compatible with {@link module:utils/emittermixin~EmitterMixin}.\n *\n * DOM emitter mixin is by default available in the {@link module:ui/view~View} class,\n * but it can also be mixed into any other class:\n *\n *\t\timport mix from '../utils/mix.js';\n *\t\timport DomEmitterMixin from '../utils/dom/emittermixin.js';\n *\n *\t\tclass SomeView {}\n *\t\tmix( SomeView, DomEmitterMixin );\n *\n *\t\tconst view = new SomeView();\n *\t\tview.listenTo( domElement, ( evt, domEvt ) => {\n *\t\t\tconsole.log( evt, domEvt );\n *\t\t} );\n *\n * @mixin EmitterMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n */\nconst DomEmitterMixin = extend( {}, EmitterMixin, {\n\t/**\n\t * Registers a callback function to be executed when an event is fired in a specific Emitter or DOM Node.\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} emitter The object that fires the event.\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tlistenTo( emitter, ...rest ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with\n\t\t// corresponding ProxyEmitter (or create one if not existing).\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter ) || new ProxyEmitter( emitter );\n\n\t\t\tproxy.attach( ...rest );\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.listenTo.call( this, emitter, ...rest );\n\t},\n\n\t/**\n\t * Stops listening for events. It can be used at different levels:\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * * To stop listening to a specific callback.\n\t * * To stop listening to a specific event.\n\t * * To stop listening to all events fired by a specific object.\n\t * * To stop listening to all events fired by all object.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n\t * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n\t * for all events from `emitter`.\n\t * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n\t * `event`.\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with corresponding ProxyEmitter.\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter );\n\n\t\t\t// Element has no listeners.\n\t\t\tif ( !proxy ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.stopListening.call( this, emitter, event, callback );\n\n\t\tif ( emitter instanceof ProxyEmitter ) {\n\t\t\temitter.detach( event );\n\t\t}\n\t},\n\n\t/**\n\t * Retrieves ProxyEmitter instance for given DOM Node residing in this Host.\n\t *\n\t * @pivate\n\t * @param {Node} node DOM Node of the ProxyEmitter.\n\t * @returns {module:utils/dom/emittermixin~ProxyEmitter} ProxyEmitter instance or null.\n\t */\n\t_getProxyEmitter( node ) {\n\t\treturn _getEmitterListenedTo( this, getNodeUID( node ) );\n\t}\n} );\n\nexport default DomEmitterMixin;\n\n/**\n * Creates a ProxyEmitter instance. Such an instance is a bridge between a DOM Node firing events\n * and any Host listening to them. It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#on}.\n *\n * listenTo( click, ... )\n * +-----------------------------------------+\n * | stopListening( ... ) |\n * +----------------------------+ | addEventListener( click, ... )\n * | Host | | +---------------------------------------------+\n * +----------------------------+ | | removeEventListener( click, ... ) |\n * | _listeningTo: { | +----------v-------------+ |\n * | UID: { | | ProxyEmitter | |\n * | emitter: ProxyEmitter, | +------------------------+ +------------v----------+\n * | callbacks: { | | events: { | | Node (HTMLElement) |\n * | click: [ callbacks ] | | click: [ callbacks ] | +-----------------------+\n * | } | | }, | | data-ck-expando: UID |\n * | } | | _domNode: Node, | +-----------------------+\n * | } | | _domListeners: {}, | |\n * | +------------------------+ | | _emitterId: UID | |\n * | | DomEmitterMixin | | +--------------^---------+ |\n * | +------------------------+ | | | |\n * +--------------^-------------+ | +---------------------------------------------+\n * | | click (DOM Event)\n * +-----------------------------------------+\n * fire( click, DOM Event )\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n * @private\n */\nclass ProxyEmitter {\n\t/**\n\t * @param {Node} node DOM Node that fires events.\n\t * @returns {Object} ProxyEmitter instance bound to the DOM Node.\n\t */\n\tconstructor( node ) {\n\t\t// Set emitter ID to match DOM Node \"expando\" property.\n\t\t_setEmitterId( this, getNodeUID( node ) );\n\n\t\t// Remember the DOM Node this ProxyEmitter is bound to.\n\t\tthis._domNode = node;\n\t}\n}\n\nextend( ProxyEmitter.prototype, EmitterMixin, {\n\t/**\n\t * Collection of native DOM listeners.\n\t *\n\t * @private\n\t * @member {Object} module:utils/dom/emittermixin~ProxyEmitter#_domListeners\n\t */\n\n\t/**\n\t * Registers a callback function to be executed when an event is fired.\n\t *\n\t * It attaches a native DOM listener to the DOM Node. When fired,\n\t * a corresponding Emitter event will also fire with DOM Event object as an argument.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#attach\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tattach( event, callback, options = {} ) {\n\t\t// If the DOM Listener for given event already exist it is pointless\n\t\t// to attach another one.\n\t\tif ( this._domListeners && this._domListeners[ event ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domListener = this._createDomListener( event, !!options.useCapture );\n\n\t\t// Attach the native DOM listener to DOM Node.\n\t\tthis._domNode.addEventListener( event, domListener, !!options.useCapture );\n\n\t\tif ( !this._domListeners ) {\n\t\t\tthis._domListeners = {};\n\t\t}\n\n\t\t// Store the native DOM listener in this ProxyEmitter. It will be helpful\n\t\t// when stopping listening to the event.\n\t\tthis._domListeners[ event ] = domListener;\n\t},\n\n\t/**\n\t * Stops executing the callback on the given event.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#detach\n\t * @param {String} event The name of the event.\n\t */\n\tdetach( event ) {\n\t\tlet events;\n\n\t\t// Remove native DOM listeners which are orphans. If no callbacks\n\t\t// are awaiting given event, detach native DOM listener from DOM Node.\n\t\t// See: {@link attach}.\n\n\t\tif ( this._domListeners[ event ] && ( !( events = this._events[ event ] ) || !events.callbacks.length ) ) {\n\t\t\tthis._domListeners[ event ].removeListener();\n\t\t}\n\t},\n\n\t/**\n\t * Creates a native DOM listener callback. When the native DOM event\n\t * is fired it will fire corresponding event on this ProxyEmitter.\n\t * Note: A native DOM Event is passed as an argument.\n\t *\n\t * @private\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#_createDomListener\n\t * @param {String} event The name of the event.\n\t * @param {Boolean} useCapture Indicates whether the listener was created for capturing event.\n\t * @returns {Function} The DOM listener callback.\n\t */\n\t_createDomListener( event, useCapture ) {\n\t\tconst domListener = domEvt => {\n\t\t\tthis.fire( event, domEvt );\n\t\t};\n\n\t\t// Supply the DOM listener callback with a function that will help\n\t\t// detach it from the DOM Node, when it is no longer necessary.\n\t\t// See: {@link detach}.\n\t\tdomListener.removeListener = () => {\n\t\t\tthis._domNode.removeEventListener( event, domListener, useCapture );\n\t\t\tdelete this._domListeners[ event ];\n\t\t};\n\n\t\treturn domListener;\n\t}\n} );\n\n// Gets an unique DOM Node identifier. The identifier will be set if not defined.\n//\n// @private\n// @param {Node} node\n// @returns {String} UID for given DOM Node.\nfunction getNodeUID( node ) {\n\treturn node[ 'data-ck-expando' ] || ( node[ 'data-ck-expando' ] = uid() );\n}\n\n/**\n * Interface representing classes which mix in {@link module:utils/dom/emittermixin~EmitterMixin}.\n *\n * @interface Emitter\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/observer\n */\n\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Abstract base observer class. Observers are classes which listen to DOM events, do the preliminary\n * processing and fire events on the {@link module:engine/view/document~Document} objects.\n * Observers can also add features to the view, for instance by updating its status or marking elements\n * which need refresh on DOM events.\n *\n * @abstract\n */\nexport default class Observer {\n\t/**\n\t * Creates an instance of the observer.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/document~Document} object.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * State of the observer. If it is disabled events will not be fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Enables the observer. This method is called when the observer is registered to the\n\t * {@link module:engine/view/view~View} and after {@link module:engine/view/view~View#forceRender rendering}\n\t * (all observers are {@link #disable disabled} before rendering).\n\t *\n\t * A typical use case for disabling observers is that mutation observers need to be disabled for the rendering.\n\t * However, a child class may not need to be disabled, so it can implement an empty method.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#disable\n\t */\n\tenable() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the observer. This method is called before\n\t * {@link module:engine/view/view~View#forceRender rendering} to prevent firing events during rendering.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#enable\n\t */\n\tdisable() {\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Disables and destroys the observer, among others removes event listeners created by the observer.\n\t */\n\tdestroy() {\n\t\tthis.disable();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Starts observing the given root element.\n\t *\n\t * @method #observe\n\t * @param {HTMLElement} domElement\n\t * @param {String} name The name of the root element.\n\t */\n}\n\nmix( Observer, DomEmitterMixin );\n","import MapCache from './_MapCache.js';\nimport setCacheAdd from './_setCacheAdd.js';\nimport setCacheHas from './_setCacheHas.js';\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\nexport default SetCache;\n","/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n}\n\nexport default setCacheAdd;\n","/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n return this.__data__.has(value);\n}\n\nexport default setCacheHas;\n","/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\nfunction arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n}\n\nexport default arraySome;\n","/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n return cache.has(key);\n}\n\nexport default cacheHas;\n","import SetCache from './_SetCache.js';\nimport arraySome from './_arraySome.js';\nimport cacheHas from './_cacheHas.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(array);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n}\n\nexport default equalArrays;\n","/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n}\n\nexport default mapToArray;\n","/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n}\n\nexport default setToArray;\n","import Symbol from './_Symbol.js';\nimport Uint8Array from './_Uint8Array.js';\nimport eq from './eq.js';\nimport equalArrays from './_equalArrays.js';\nimport mapToArray from './_mapToArray.js';\nimport setToArray from './_setToArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n}\n\nexport default equalByTag;\n","import getAllKeys from './_getAllKeys.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n}\n\nexport default equalObjects;\n","import Stack from './_Stack.js';\nimport equalArrays from './_equalArrays.js';\nimport equalByTag from './_equalByTag.js';\nimport equalObjects from './_equalObjects.js';\nimport getTag from './_getTag.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\nexport default baseIsEqualDeep;\n","import baseIsEqualDeep from './_baseIsEqualDeep.js';\nimport isObjectLike from './isObjectLike.js';\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\nexport default baseIsEqual;\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\nfunction isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n}\n\nexport default isEqualWith;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mutationobserver\n */\n\n/* globals window */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { startsWithFiller, getDataWithoutFiller } from '../filler';\nimport { isEqualWith } from 'lodash-es';\n\n/**\n * Mutation observer class observes changes in the DOM, fires {@link module:engine/view/document~Document#event:mutations} event, mark view\n * elements as changed and call {@link module:engine/view/renderer~Renderer#render}.\n * Because all mutated nodes are marked as \"to be rendered\" and the\n * {@link module:engine/view/renderer~Renderer#render} is called, all changes will be reverted, unless the mutation will be handled by the\n * {@link module:engine/view/document~Document#event:mutations} event listener. It means user will see only handled changes, and the editor\n * will block all changes which are not handled.\n *\n * Mutation Observer also take care of reducing number of mutations which are fired. It removes duplicates and\n * mutations on elements which do not have corresponding view elements. Also\n * {@link module:engine/view/observer/mutationobserver~MutatedText text mutation} is fired only if parent element do not change child list.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class MutationObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Native mutation observer config.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {\n\t\t\tchildList: true,\n\t\t\tcharacterData: true,\n\t\t\tcharacterDataOldValue: true,\n\t\t\tsubtree: true\n\t\t};\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#_renderer}.\n\t\t *\n\t\t * @member {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis.renderer = view._renderer;\n\n\t\t/**\n\t\t * Observed DOM elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<HTMLElement>}\n\t\t */\n\t\tthis._domElements = [];\n\n\t\t/**\n\t\t * Native mutation observer.\n\t\t *\n\t\t * @private\n\t\t * @member {MutationObserver}\n\t\t */\n\t\tthis._mutationObserver = new window.MutationObserver( this._onMutations.bind( this ) );\n\t}\n\n\t/**\n\t * Synchronously fires {@link module:engine/view/document~Document#event:mutations} event with all mutations in record queue.\n\t * At the same time empties the queue so mutations will not be fired twice.\n\t */\n\tflush() {\n\t\tthis._onMutations( this._mutationObserver.takeRecords() );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tthis._domElements.push( domElement );\n\n\t\tif ( this.isEnabled ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tenable() {\n\t\tsuper.enable();\n\n\t\tfor ( const domElement of this._domElements ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdisable() {\n\t\tsuper.disable();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * Handles mutations. Deduplicates, mark view elements to sync, fire event and call render.\n\t *\n\t * @private\n\t * @param {Array.<Object>} domMutations Array of native mutations.\n\t */\n\t_onMutations( domMutations ) {\n\t\t// As a result of this.flush() we can have an empty collection.\n\t\tif ( domMutations.length === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.domConverter;\n\n\t\t// Use map and set for deduplication.\n\t\tconst mutatedTexts = new Map();\n\t\tconst mutatedElements = new Set();\n\n\t\t// Handle `childList` mutations first, so we will be able to check if the `characterData` mutation is in the\n\t\t// element with changed structure anyway.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tif ( mutation.type === 'childList' ) {\n\t\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t\t// Do not collect mutations from UIElements.\n\t\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif ( element && !this._isBogusBrMutation( mutation ) ) {\n\t\t\t\t\tmutatedElements.add( element );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Handle `characterData` mutations later, when we have the full list of nodes which changed structure.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t// Do not collect mutations from UIElements.\n\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tif ( mutation.type === 'characterData' ) {\n\t\t\t\tconst text = domConverter.findCorrespondingViewText( mutation.target );\n\n\t\t\t\tif ( text && !mutatedElements.has( text.parent ) ) {\n\t\t\t\t\t// Use text as a key, for deduplication. If there will be another mutation on the same text element\n\t\t\t\t\t// we will have only one in the map.\n\t\t\t\t\tmutatedTexts.set( text, {\n\t\t\t\t\t\ttype: 'text',\n\t\t\t\t\t\toldText: text.data,\n\t\t\t\t\t\tnewText: getDataWithoutFiller( mutation.target ),\n\t\t\t\t\t\tnode: text\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t\t// When we added first letter to the text node which had only inline filler, for the DOM it is mutation\n\t\t\t\t// on text, but for the view, where filler text node did not existed, new text node was created, so we\n\t\t\t\t// need to fire 'children' mutation instead of 'text'.\n\t\t\t\telse if ( !text && startsWithFiller( mutation.target ) ) {\n\t\t\t\t\tmutatedElements.add( domConverter.mapDomToView( mutation.target.parentNode ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Now we build the list of mutations to fire and mark elements. We did not do it earlier to avoid marking the\n\t\t// same node multiple times in case of duplication.\n\n\t\t// List of mutations we will fire.\n\t\tconst viewMutations = [];\n\n\t\tfor ( const mutatedText of mutatedTexts.values() ) {\n\t\t\tthis.renderer.markToSync( 'text', mutatedText.node );\n\t\t\tviewMutations.push( mutatedText );\n\t\t}\n\n\t\tfor ( const viewElement of mutatedElements ) {\n\t\t\tconst domElement = domConverter.mapViewToDom( viewElement );\n\t\t\tconst viewChildren = Array.from( viewElement.getChildren() );\n\t\t\tconst newViewChildren = Array.from( domConverter.domChildrenToView( domElement, { withChildren: false } ) );\n\n\t\t\t// It may happen that as a result of many changes (sth was inserted and then removed),\n\t\t\t// both elements haven't really changed. #1031\n\t\t\tif ( !isEqualWith( viewChildren, newViewChildren, sameNodes ) ) {\n\t\t\t\tthis.renderer.markToSync( 'children', viewElement );\n\n\t\t\t\tviewMutations.push( {\n\t\t\t\t\ttype: 'children',\n\t\t\t\t\toldChildren: viewChildren,\n\t\t\t\t\tnewChildren: newViewChildren,\n\t\t\t\t\tnode: viewElement\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\t// Retrieve `domSelection` using `ownerDocument` of one of mutated nodes.\n\t\t// There should not be simultaneous mutation in multiple documents, so it's fine.\n\t\tconst domSelection = domMutations[ 0 ].target.ownerDocument.getSelection();\n\n\t\tlet viewSelection = null;\n\n\t\tif ( domSelection && domSelection.anchorNode ) {\n\t\t\t// If `domSelection` is inside a dom node that is already bound to a view node from view tree, get\n\t\t\t// corresponding selection in the view and pass it together with `viewMutations`. The `viewSelection` may\n\t\t\t// be used by features handling mutations.\n\t\t\t// Only one range is supported.\n\n\t\t\tconst viewSelectionAnchor = domConverter.domPositionToView( domSelection.anchorNode, domSelection.anchorOffset );\n\t\t\tconst viewSelectionFocus = domConverter.domPositionToView( domSelection.focusNode, domSelection.focusOffset );\n\n\t\t\t// Anchor and focus has to be properly mapped to view.\n\t\t\tif ( viewSelectionAnchor && viewSelectionFocus ) {\n\t\t\t\tviewSelection = new ViewSelection( viewSelectionAnchor );\n\t\t\t\tviewSelection.setFocus( viewSelectionFocus );\n\t\t\t}\n\t\t}\n\n\t\tthis.document.fire( 'mutations', viewMutations, viewSelection );\n\n\t\t// If nothing changes on `mutations` event, at this point we have \"dirty DOM\" (changed) and de-synched\n\t\t// view (which has not been changed). In order to \"reset DOM\" we render the view again.\n\t\tthis.view.forceRender();\n\n\t\tfunction sameNodes( child1, child2 ) {\n\t\t\t// First level of comparison (array of children vs array of children) – use the Lodash's default behavior.\n\t\t\tif ( Array.isArray( child1 ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Elements.\n\t\t\tif ( child1 === child2 ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t\t// Texts.\n\t\t\telse if ( child1.is( 'text' ) && child2.is( 'text' ) ) {\n\t\t\t\treturn child1.data === child2.data;\n\t\t\t}\n\n\t\t\t// Not matching types.\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Checks if mutation was generated by the browser inserting bogus br on the end of the block element.\n\t * Such mutations are generated while pressing space or performing native spellchecker correction\n\t * on the end of the block element in Firefox browser.\n\t *\n\t * @private\n\t * @param {Object} mutation Native mutation object.\n\t * @returns {Boolean}\n\t */\n\t_isBogusBrMutation( mutation ) {\n\t\tlet addedNode = null;\n\n\t\t// Check if mutation added only one node on the end of its parent.\n\t\tif ( mutation.nextSibling === null && mutation.removedNodes.length === 0 && mutation.addedNodes.length == 1 ) {\n\t\t\taddedNode = this.domConverter.domToView( mutation.addedNodes[ 0 ], {\n\t\t\t\twithChildren: false\n\t\t\t} );\n\t\t}\n\n\t\treturn addedNode && addedNode.is( 'element', 'br' );\n\t}\n}\n\n/**\n * Fired when mutation occurred. If tree view is not changed on this event, DOM will be reverted to the state before\n * mutation, so all changes which should be applied, should be handled on this event.\n *\n * Introduced by {@link module:engine/view/observer/mutationobserver~MutationObserver}.\n *\n * Note that because {@link module:engine/view/observer/mutationobserver~MutationObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @event module:engine/view/document~Document#event:mutations\n * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|module:engine/view/observer/mutationobserver~MutatedChildren>}\n * viewMutations Array of mutations.\n * For mutated texts it will be {@link module:engine/view/observer/mutationobserver~MutatedText} and for mutated elements it will be\n * {@link module:engine/view/observer/mutationobserver~MutatedChildren}. You can recognize the type based on the `type` property.\n * @param {module:engine/view/selection~Selection|null} viewSelection View selection that is a result of converting DOM selection to view.\n * Keep in\n * mind that the DOM selection is already \"updated\", meaning that it already acknowledges changes done in mutation.\n */\n\n/**\n * Mutation item for text.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedText\n *\n * @property {String} type For text mutations it is always 'text'.\n * @property {module:engine/view/text~Text} node Mutated text node.\n * @property {String} oldText Old text.\n * @property {String} newText New text.\n */\n\n/**\n * Mutation item for child nodes.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedText\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @property {String} type For child nodes mutations it is always 'children'.\n * @property {module:engine/view/element~Element} node Parent of the mutated children.\n * @property {Array.<module:engine/view/node~Node>} oldChildren Old child nodes.\n * @property {Array.<module:engine/view/node~Node>} newChildren New child nodes.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventdata\n */\n\nimport { extend } from 'lodash-es';\n\n/**\n * Information about a DOM event in context of the {@link module:engine/view/document~Document}.\n * It wraps the native event, which usually should not be used as the wrapper contains\n * additional data (like key code for keyboard events).\n */\nexport default class DomEventData {\n\t/**\n\t * @param {module:engine/view/view~View} view The instance of the view controller.\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] Additional properties that the instance should contain.\n\t */\n\tconstructor( view, domEvent, additionalData ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View} module:engine/view/observer/observer~Observer.DomEvent#view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * The instance of the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document} module:engine/view/observer/observer~Observer.DomEvent#document\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * The DOM event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Event} module:engine/view/observer/observer~Observer.DomEvent#domEvent\n\t\t */\n\t\tthis.domEvent = domEvent;\n\n\t\t/**\n\t\t * The DOM target.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} module:engine/view/observer/observer~Observer.DomEvent#target\n\t\t */\n\t\tthis.domTarget = domEvent.target;\n\n\t\textend( this, additionalData );\n\t}\n\n\t/**\n\t * The tree view element representing the target.\n\t *\n\t * @readonly\n\t * @type module:engine/view/element~Element\n\t */\n\tget target() {\n\t\treturn this.view.domConverter.mapDomToView( this.domTarget );\n\t}\n\n\t/**\n\t * Prevents the native's event default action.\n\t */\n\tpreventDefault() {\n\t\tthis.domEvent.preventDefault();\n\t}\n\n\t/**\n\t * Stops native event propagation.\n\t */\n\tstopPropagation() {\n\t\tthis.domEvent.stopPropagation();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventobserver\n */\n\nimport Observer from './observer';\nimport DomEventData from './domeventdata';\n\n/**\n * Base class for DOM event observers. This class handles\n * {@link module:engine/view/observer/observer~Observer#observe adding} listeners to DOM elements,\n * {@link module:engine/view/observer/observer~Observer#disable disabling} and\n * {@link module:engine/view/observer/observer~Observer#enable re-enabling} events.\n * Child class needs to define\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#domEventType DOM event type} and\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#onDomEvent callback}.\n *\n * For instance:\n *\n *\t\tclass ClickObserver extends DomEventObserver {\n *\t\t\t// It can also be defined as a normal property in the constructor.\n *\t\t\tget domEventType() {\n *\t\t\t\treturn 'click';\n *\t\t\t}\n *\n *\t\t\tonDomEvent( domEvent ) {\n *\t\t\t\tthis.fire( 'click', domEvent );\n *\t\t\t}\n *\t\t}\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DomEventObserver extends Observer {\n\t/**\n\t * Type of the DOM event the observer should listen on. Array of types can be defined\n\t * if the obsever should listen to multiple DOM events.\n\t *\n\t * @readonly\n\t * @member {String|Array.<String>} #domEventType\n\t */\n\n\t/**\n\t * Callback which should be called when the DOM event occurred. Note that the callback will not be called if\n\t * observer {@link #isEnabled is not enabled}.\n\t *\n\t * @see #domEventType\n\t * @abstract\n\t * @method #onDomEvent\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * If set to `true` DOM events will be listened on the capturing phase.\n\t\t * Default value is `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.useCapture = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst types = typeof this.domEventType == 'string' ? [ this.domEventType ] : this.domEventType;\n\n\t\ttypes.forEach( type => {\n\t\t\tthis.listenTo( domElement, type, ( eventInfo, domEvent ) => {\n\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\tthis.onDomEvent( domEvent );\n\t\t\t\t}\n\t\t\t}, { useCapture: this.useCapture } );\n\t\t} );\n\t}\n\n\t/**\n\t * Calls `Document#fire()` if observer {@link #isEnabled is enabled}.\n\t *\n\t * @see module:utils/emittermixin~EmitterMixin#fire\n\t * @param {String} eventType The event type (name).\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] The additional data which should extend the\n\t * {@link module:engine/view/observer/domeventdata~DomEventData event data} object.\n\t */\n\tfire( eventType, domEvent, additionalData ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( eventType, new DomEventData( this.view, domEvent, additionalData ) );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/keyobserver\n */\n\nimport DomEventObserver from './domeventobserver';\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Observer for events connected with pressing keyboard keys.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class KeyObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'keydown', 'keyup' ];\n\t}\n\n\tonDomEvent( domEvt ) {\n\t\tthis.fire( domEvt.type, domEvt, {\n\t\t\tkeyCode: domEvt.keyCode,\n\n\t\t\taltKey: domEvt.altKey,\n\t\t\tctrlKey: domEvt.ctrlKey || domEvt.metaKey,\n\t\t\tshiftKey: domEvt.shiftKey,\n\n\t\t\tget keystroke() {\n\t\t\t\treturn getCode( this );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n/**\n * Fired when a key has been pressed.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keydown\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * Fired when a key has been released.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keyup\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * The value of both events - {@link module:engine/view/document~Document#event:keydown} and\n * {@link module:engine/view/document~Document#event:keyup}.\n *\n * @class module:engine/view/observer/keyobserver~KeyEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n * @implements module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * Code of the whole keystroke. See {@link module:utils/keyboard~getCode}.\n *\n * @readonly\n * @member {Number} module:engine/view/observer/keyobserver~KeyEventData#keystroke\n */\n","import root from './_root.js';\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n * console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n return root.Date.now();\n};\n\nexport default now;\n","import baseGetTag from './_baseGetTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n return typeof value == 'symbol' ||\n (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\nexport default isSymbol;\n","import isObject from './isObject.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** Used to match leading and trailing whitespace. */\nvar reTrim = /^\\s+|\\s+$/g;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = value.replace(reTrim, '');\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nexport default toNumber;\n","import isObject from './isObject.js';\nimport now from './now.js';\nimport toNumber from './toNumber.js';\n\n/** Error message constants. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max,\n nativeMin = Math.min;\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n * Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n * The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n * 'leading': true,\n * 'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n var lastArgs,\n lastThis,\n maxWait,\n result,\n timerId,\n lastCallTime,\n lastInvokeTime = 0,\n leading = false,\n maxing = false,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n wait = toNumber(wait) || 0;\n if (isObject(options)) {\n leading = !!options.leading;\n maxing = 'maxWait' in options;\n maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n\n function invokeFunc(time) {\n var args = lastArgs,\n thisArg = lastThis;\n\n lastArgs = lastThis = undefined;\n lastInvokeTime = time;\n result = func.apply(thisArg, args);\n return result;\n }\n\n function leadingEdge(time) {\n // Reset any `maxWait` timer.\n lastInvokeTime = time;\n // Start the timer for the trailing edge.\n timerId = setTimeout(timerExpired, wait);\n // Invoke the leading edge.\n return leading ? invokeFunc(time) : result;\n }\n\n function remainingWait(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime,\n timeWaiting = wait - timeSinceLastCall;\n\n return maxing\n ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n : timeWaiting;\n }\n\n function shouldInvoke(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime;\n\n // Either this is the first call, activity has stopped and we're at the\n // trailing edge, the system time has gone backwards and we're treating\n // it as the trailing edge, or we've hit the `maxWait` limit.\n return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n }\n\n function timerExpired() {\n var time = now();\n if (shouldInvoke(time)) {\n return trailingEdge(time);\n }\n // Restart the timer.\n timerId = setTimeout(timerExpired, remainingWait(time));\n }\n\n function trailingEdge(time) {\n timerId = undefined;\n\n // Only invoke if we have `lastArgs` which means `func` has been\n // debounced at least once.\n if (trailing && lastArgs) {\n return invokeFunc(time);\n }\n lastArgs = lastThis = undefined;\n return result;\n }\n\n function cancel() {\n if (timerId !== undefined) {\n clearTimeout(timerId);\n }\n lastInvokeTime = 0;\n lastArgs = lastCallTime = lastThis = timerId = undefined;\n }\n\n function flush() {\n return timerId === undefined ? result : trailingEdge(now());\n }\n\n function debounced() {\n var time = now(),\n isInvoking = shouldInvoke(time);\n\n lastArgs = arguments;\n lastThis = this;\n lastCallTime = time;\n\n if (isInvoking) {\n if (timerId === undefined) {\n return leadingEdge(lastCallTime);\n }\n if (maxing) {\n // Handle invocations in a tight loop.\n clearTimeout(timerId);\n timerId = setTimeout(timerExpired, wait);\n return invokeFunc(lastCallTime);\n }\n }\n if (timerId === undefined) {\n timerId = setTimeout(timerExpired, wait);\n }\n return result;\n }\n debounced.cancel = cancel;\n debounced.flush = flush;\n return debounced;\n}\n\nexport default debounce;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/fakeselectionobserver\n */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport { debounce } from 'lodash-es';\n\n/**\n * Fake selection observer class. If view selection is fake it is placed in dummy DOM container. This observer listens\n * on {@link module:engine/view/document~Document#event:keydown keydown} events and handles moving fake view selection to the correct place\n * if arrow keys are pressed.\n * Fires {@link module:engine/view/document~Document#event:selectionChange selectionChange event} simulating natural behaviour of\n * {@link module:engine/view/observer/selectionobserver~SelectionObserver SelectionObserver}.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class FakeSelectionObserver extends Observer {\n\t/**\n\t * Creates new FakeSelectionObserver instance.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'keydown', ( eventInfo, data ) => {\n\t\t\tconst selection = document.selection;\n\n\t\t\tif ( selection.isFake && _isArrowKeyCode( data.keyCode ) && this.isEnabled ) {\n\t\t\t\t// Prevents default key down handling - no selection change will occur.\n\t\t\t\tdata.preventDefault();\n\n\t\t\t\tthis._handleSelectionMove( data.keyCode );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Handles collapsing view selection according to given key code. If left or up key is provided - new selection will be\n\t * collapsed to left. If right or down key is pressed - new selection will be collapsed to right.\n\t *\n\t * This method fires {@link module:engine/view/document~Document#event:selectionChange} and\n\t * {@link module:engine/view/document~Document#event:selectionChangeDone} events imitating behaviour of\n\t * {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n\t *\n\t * @private\n\t * @param {Number} keyCode\n\t * @fires module:engine/view/document~Document#event:selectionChange\n\t * @fires module:engine/view/document~Document#event:selectionChangeDone\n\t */\n\t_handleSelectionMove( keyCode ) {\n\t\tconst selection = this.document.selection;\n\t\tconst newSelection = new ViewSelection( selection.getRanges(), { backward: selection.isBackward, fake: false } );\n\n\t\t// Left or up arrow pressed - move selection to start.\n\t\tif ( keyCode == keyCodes.arrowleft || keyCode == keyCodes.arrowup ) {\n\t\t\tnewSelection.setTo( newSelection.getFirstPosition() );\n\t\t}\n\n\t\t// Right or down arrow pressed - move selection to end.\n\t\tif ( keyCode == keyCodes.arrowright || keyCode == keyCodes.arrowdown ) {\n\t\t\tnewSelection.setTo( newSelection.getLastPosition() );\n\t\t}\n\n\t\tconst data = {\n\t\t\toldSelection: selection,\n\t\t\tnewSelection,\n\t\t\tdomSelection: null\n\t\t};\n\n\t\t// Fire dummy selection change event.\n\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t}\n}\n\n// Checks if one of the arrow keys is pressed.\n//\n// @private\n// @param {Number} keyCode\n// @returns {Boolean}\nfunction _isArrowKeyCode( keyCode ) {\n\treturn keyCode == keyCodes.arrowright ||\n\t\tkeyCode == keyCodes.arrowleft ||\n\t\tkeyCode == keyCodes.arrowup ||\n\t\tkeyCode == keyCodes.arrowdown;\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/selectionobserver\n */\n\n/* global setInterval, clearInterval */\n\nimport Observer from './observer';\nimport MutationObserver from './mutationobserver';\nimport { debounce } from 'lodash-es';\n\n/**\n * Selection observer class observes selection changes in the document. If selection changes on the document this\n * observer checks if there are any mutations and if DOM selection is different than the\n * {@link module:engine/view/document~Document#selection view selection}. Selection observer fires\n * {@link module:engine/view/document~Document#event:selectionChange} event only if selection change was the only change in the document\n * and DOM selection is different then the view selection.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class SelectionObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Instance of the mutation observer. Selection observer calls\n\t\t * {@link module:engine/view/observer/mutationobserver~MutationObserver#flush} to ensure that the mutations will be handled\n\t\t * before the {@link module:engine/view/document~Document#event:selectionChange} event is fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/observer/mutationobserver~MutationObserver}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#mutationObserver\n\t\t */\n\t\tthis.mutationObserver = view.getObserver( MutationObserver );\n\n\t\t/**\n\t\t * Reference to the view {@link module:engine/view/documentselection~DocumentSelection} object used to compare\n\t\t * new selection with it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#selection\n\t\t */\n\t\tthis.selection = this.document.selection;\n\n\t\t/* eslint-disable max-len */\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter} module:engine/view/observer/selectionobserver~SelectionObserver#domConverter\n\t\t */\n\t\t/* eslint-enable max-len */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Set of documents which have added \"selectionchange\" listener to avoid adding listener twice to the same\n\t\t * document.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.<Document>} module:engine/view/observer/selectionobserver~SelectionObserver#_documents\n\t\t */\n\t\tthis._documents = new WeakSet();\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\n\t\tthis._clearInfiniteLoopInterval = setInterval( () => this._clearInfiniteLoop(), 1000 );\n\n\t\t/**\n\t\t * Private property to check if the code does not enter infinite loop.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} module:engine/view/observer/selectionobserver~SelectionObserver#_loopbackCounter\n\t\t */\n\t\tthis._loopbackCounter = 0;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst domDocument = domElement.ownerDocument;\n\n\t\t// Add listener once per each document.\n\t\tif ( this._documents.has( domDocument ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.listenTo( domDocument, 'selectionchange', () => {\n\t\t\tthis._handleSelectionChange( domDocument );\n\t\t} );\n\n\t\tthis._documents.add( domDocument );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tclearInterval( this._clearInfiniteLoopInterval );\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Selection change listener. {@link module:engine/view/observer/mutationobserver~MutationObserver#flush Flush} mutations, check if\n\t * selection changes and fires {@link module:engine/view/document~Document#event:selectionChange} event on every change\n\t * and {@link module:engine/view/document~Document#event:selectionChangeDone} when selection stop changing.\n\t *\n\t * @private\n\t * @param {Document} domDocument DOM document.\n\t */\n\t_handleSelectionChange( domDocument ) {\n\t\t// Selection is handled when document is not focused but is read-only. This is because in read-only\n\t\t// mode contenteditable is set as false and editor won't receive focus but we still need to know\n\t\t// selection position.\n\t\tif ( !this.isEnabled || ( !this.document.isFocused && !this.document.isReadOnly ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure the mutation event will be before selection event on all browsers.\n\t\tthis.mutationObserver.flush();\n\n\t\t// If there were mutations then the view will be re-rendered by the mutation observer and selection\n\t\t// will be updated, so selections will equal and event will not be fired, as expected.\n\t\tconst domSelection = domDocument.defaultView.getSelection();\n\t\tconst newViewSelection = this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( this.selection.isEqual( newViewSelection ) && this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure we are not in the infinite loop (#400).\n\t\t// This counter is reset each second. 60 selection changes in 1 second is enough high number\n\t\t// to be very difficult (impossible) to achieve using just keyboard keys (during normal editor use).\n\t\tif ( ++this._loopbackCounter > 60 ) {\n\t\t\t// Selection change observer detected an infinite rendering loop.\n\t\t\t// Most probably you try to put the selection in the position which is not allowed\n\t\t\t// by the browser and browser fixes it automatically what causes `selectionchange` event on\n\t\t\t// which a loopback through a model tries to re-render the wrong selection and again.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Selection change observer detected an infinite rendering loop.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this.selection.isSimilar( newViewSelection ) ) {\n\t\t\t// If selection was equal and we are at this point of algorithm, it means that it was incorrect.\n\t\t\t// Just re-render it, no need to fire any events, etc.\n\t\t\tthis.view.forceRender();\n\t\t} else {\n\t\t\tconst data = {\n\t\t\t\toldSelection: this.selection,\n\t\t\t\tnewSelection: newViewSelection,\n\t\t\t\tdomSelection\n\t\t\t};\n\n\t\t\t// Prepare data for new selection and fire appropriate events.\n\t\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t\t}\n\t}\n\n\t/**\n\t * Clears `SelectionObserver` internal properties connected with preventing infinite loop.\n\t *\n\t * @protected\n\t */\n\t_clearInfiniteLoop() {\n\t\tthis._loopbackCounter = 0;\n\t}\n}\n\n/**\n * Fired when selection has changed. This event is fired only when the selection change was the only change that happened\n * in the document, and old selection is different then the new selection.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChange\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n\n/**\n * Fired when selection stops changing.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChangeDone\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/focusobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:focus Focus}\n * and {@link module:engine/view/document~Document#event:blur blur} events observer.\n * Focus observer handle also {@link module:engine/view/rooteditableelement~RootEditableElement#isFocused isFocused} property of the\n * {@link module:engine/view/rooteditableelement~RootEditableElement root elements}.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class FocusObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'focus', 'blur' ];\n\t\tthis.useCapture = true;\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'focus', () => {\n\t\t\tdocument.isFocused = true;\n\n\t\t\t// Unfortunately native `selectionchange` event is fired asynchronously.\n\t\t\t// We need to wait until `SelectionObserver` handle the event and then render. Otherwise rendering will\n\t\t\t// overwrite new DOM selection with selection from the view.\n\t\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/795 for more details.\n\t\t\t// Long timeout is needed to solve #676 and https://github.com/ckeditor/ckeditor5-engine/issues/1157 issues.\n\t\t\tthis._renderTimeoutId = setTimeout( () => view.forceRender(), 50 );\n\t\t} );\n\n\t\tdocument.on( 'blur', ( evt, data ) => {\n\t\t\tconst selectedEditable = document.selection.editableElement;\n\n\t\t\tif ( selectedEditable === null || selectedEditable === data.target ) {\n\t\t\t\tdocument.isFocused = false;\n\n\t\t\t\t// Re-render the document to update view elements.\n\t\t\t\tview.forceRender();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Identifier of the timeout currently used by focus listener to delay rendering execution.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_renderTimeoutId\n\t\t */\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._renderTimeoutId ) {\n\t\t\tclearTimeout( this._renderTimeoutId );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n}\n\n/**\n * Fired when one of the editables gets focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:focus\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when one of the editables loses focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:blur\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/compositionobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:compositionstart Compositionstart},\n * {@link module:engine/view/document~Document#event:compositionupdate compositionupdate} and\n * {@link module:engine/view/document~Document#event:compositionend compositionend} events observer.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class CompositionObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'compositionstart', 'compositionupdate', 'compositionend' ];\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'compositionstart', () => {\n\t\t\tdocument.isComposing = true;\n\t\t} );\n\n\t\tdocument.on( 'compositionend', () => {\n\t\t\tdocument.isComposing = false;\n\t\t} );\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when composition starts inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionstart\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition is updated inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionupdate\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition ends inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionend\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/observer/inputobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Observer for events connected with data input.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class InputObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'beforeinput' ];\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired before browser inputs (or deletes) some data.\n *\n * This event is available only on browsers which support DOM `beforeinput` event.\n *\n * Introduced by {@link module:engine/view/observer/inputobserver~InputObserver}.\n *\n * Note that because {@link module:engine/view/observer/inputobserver~InputObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/inputobserver~InputObserver\n * @event module:engine/view/document~Document#event:beforeinput\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isrange\n */\n\n/**\n * Checks if the object is a native DOM Range.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isRange( obj ) {\n\treturn Object.prototype.toString.apply( obj ) == '[object Range]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getborderwidths\n */\n\n/**\n * Returns an object containing CSS border widths of a specified HTML element.\n *\n * @param {HTMLElement} element An element which has CSS borders.\n * @returns {Object} An object containing `top`, `left`, `right` and `bottom` properties\n * with numerical values of the `border-[top,left,right,bottom]-width` CSS styles.\n */\nexport default function getBorderWidths( element ) {\n\t// Call getComputedStyle on the window the element document belongs to.\n\tconst style = element.ownerDocument.defaultView.getComputedStyle( element );\n\n\treturn {\n\t\ttop: parseInt( style.borderTopWidth, 10 ),\n\t\tright: parseInt( style.borderRightWidth, 10 ),\n\t\tbottom: parseInt( style.borderBottomWidth, 10 ),\n\t\tleft: parseInt( style.borderLeftWidth, 10 )\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/rect\n */\n\nimport isRange from './isrange';\nimport isWindow from './iswindow';\nimport getBorderWidths from './getborderwidths';\nimport isText from './istext';\nimport { isElement } from 'lodash-es';\n\nconst rectProperties = [ 'top', 'right', 'bottom', 'left', 'width', 'height' ];\n\n/**\n * A helper class representing a `ClientRect` object, e.g. value returned by\n * the native `object.getBoundingClientRect()` method. Provides a set of methods\n * to manipulate the rect and compare it against other rect instances.\n */\nexport default class Rect {\n\t/**\n\t * Creates an instance of rect.\n\t *\n\t *\t\t// Rect of an HTMLElement.\n\t *\t\tconst rectA = new Rect( document.body );\n\t *\n\t *\t\t// Rect of a DOM Range.\n\t *\t\tconst rectB = new Rect( document.getSelection().getRangeAt( 0 ) );\n\t *\n\t *\t\t// Rect of a window (web browser viewport).\n\t *\t\tconst rectC = new Rect( window );\n\t *\n\t *\t\t// Rect out of an object.\n\t *\t\tconst rectD = new Rect( { top: 0, right: 10, bottom: 10, left: 0, width: 10, height: 10 } );\n\t *\n\t *\t\t// Rect out of another Rect instance.\n\t *\t\tconst rectE = new Rect( rectD );\n\t *\n\t *\t\t// Rect out of a ClientRect.\n\t *\t\tconst rectF = new Rect( document.body.getClientRects().item( 0 ) );\n\t *\n\t * **Note**: By default a rect of an HTML element includes its CSS borders and scrollbars (if any)\n\t * ant the rect of a `window` includes scrollbars too. Use {@link #excludeScrollbarsAndBorders}\n\t * to get the inner part of the rect.\n\t *\n\t * @param {HTMLElement|Range|Window|ClientRect|module:utils/dom/rect~Rect|Object} source A source object to create the rect.\n\t */\n\tconstructor( source ) {\n\t\tconst isSourceRange = isRange( source );\n\n\t\t/**\n\t\t * The object this rect is for.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {HTMLElement|Range|ClientRect|module:utils/dom/rect~Rect|Object} #_source\n\t\t */\n\t\tObject.defineProperty( this, '_source', {\n\t\t\t// If the source is a Rect instance, copy it's #_source.\n\t\t\tvalue: source._source || source,\n\t\t\twritable: true,\n\t\t\tenumerable: false\n\t\t} );\n\n\t\tif ( isElement( source ) || isSourceRange ) {\n\t\t\t// The `Rect` class depends on `getBoundingClientRect` and `getClientRects` DOM methods. If the source\n\t\t\t// of a rect in an HTML element or a DOM range but it does not belong to any rendered DOM tree, these methods\n\t\t\t// will fail to obtain the geometry and the rect instance makes little sense to the features using it.\n\t\t\t// To get rid of this warning make sure the source passed to the constructor is a descendant of `window.document.body`.\n\t\t\t// @if CK_DEBUG // const sourceNode = isSourceRange ? source.startContainer : source;\n\t\t\t// @if CK_DEBUG // if ( !sourceNode.ownerDocument || !sourceNode.ownerDocument.body.contains( sourceNode ) ) {\n\t\t\t// @if CK_DEBUG // \tconsole.warn(\n\t\t\t// @if CK_DEBUG // \t\t'rect-source-not-in-dom: The source of this rect does not belong to any rendered DOM tree.',\n\t\t\t// @if CK_DEBUG // \t\t{ source } );\n\t\t\t// @if CK_DEBUG // }\n\n\t\t\tif ( isSourceRange ) {\n\t\t\t\tcopyRectProperties( this, Rect.getDomRangeRects( source )[ 0 ] );\n\t\t\t} else {\n\t\t\t\tcopyRectProperties( this, source.getBoundingClientRect() );\n\t\t\t}\n\t\t} else if ( isWindow( source ) ) {\n\t\t\tconst { innerWidth, innerHeight } = source;\n\n\t\t\tcopyRectProperties( this, {\n\t\t\t\ttop: 0,\n\t\t\t\tright: innerWidth,\n\t\t\t\tbottom: innerHeight,\n\t\t\t\tleft: 0,\n\t\t\t\twidth: innerWidth,\n\t\t\t\theight: innerHeight\n\t\t\t} );\n\t\t} else {\n\t\t\tcopyRectProperties( this, source );\n\t\t}\n\n\t\t/**\n\t\t * The \"top\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #top\n\t\t */\n\n\t\t/**\n\t\t * The \"right\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #right\n\t\t */\n\n\t\t/**\n\t\t * The \"bottom\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #bottom\n\t\t */\n\n\t\t/**\n\t\t * The \"left\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #left\n\t\t */\n\n\t\t/**\n\t\t * The \"width\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #width\n\t\t */\n\n\t\t/**\n\t\t * The \"height\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #height\n\t\t */\n\t}\n\n\t/**\n\t * Returns a clone of the rect.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A cloned rect.\n\t */\n\tclone() {\n\t\treturn new Rect( this );\n\t}\n\n\t/**\n\t * Moves the rect so that its upper–left corner lands in desired `[ x, y ]` location.\n\t *\n\t * @param {Number} x Desired horizontal location.\n\t * @param {Number} y Desired vertical location.\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveTo( x, y ) {\n\t\tthis.top = y;\n\t\tthis.right = x + this.width;\n\t\tthis.bottom = y + this.height;\n\t\tthis.left = x;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves the rect in–place by a dedicated offset.\n\t *\n\t * @param {Number} x A horizontal offset.\n\t * @param {Number} y A vertical offset\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveBy( x, y ) {\n\t\tthis.top += y;\n\t\tthis.right += x;\n\t\tthis.left += x;\n\t\tthis.bottom += y;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns a new rect a a result of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {module:utils/dom/rect~Rect}\n\t */\n\tgetIntersection( anotherRect ) {\n\t\tconst rect = {\n\t\t\ttop: Math.max( this.top, anotherRect.top ),\n\t\t\tright: Math.min( this.right, anotherRect.right ),\n\t\t\tbottom: Math.min( this.bottom, anotherRect.bottom ),\n\t\t\tleft: Math.max( this.left, anotherRect.left )\n\t\t};\n\n\t\trect.width = rect.right - rect.left;\n\t\trect.height = rect.bottom - rect.top;\n\n\t\tif ( rect.width < 0 || rect.height < 0 ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\treturn new Rect( rect );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect [description]\n\t * @returns {Number} Area of intersection.\n\t */\n\tgetIntersectionArea( anotherRect ) {\n\t\tconst rect = this.getIntersection( anotherRect );\n\n\t\tif ( rect ) {\n\t\t\treturn rect.getArea();\n\t\t} else {\n\t\t\treturn 0;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of the rect.\n\t *\n\t * @returns {Number}\n\t */\n\tgetArea() {\n\t\treturn this.width * this.height;\n\t}\n\n\t/**\n\t * Returns a new rect, a part of the original rect, which is actually visible to the user,\n\t * e.g. an original rect cropped by parent element rects which have `overflow` set in CSS\n\t * other than `\"visible\"`.\n\t *\n\t * If there's no such visible rect, which is when the rect is limited by one or many of\n\t * the ancestors, `null` is returned.\n\t *\n\t * @returns {module:utils/dom/rect~Rect|null} A visible rect instance or `null`, if there's none.\n\t */\n\tgetVisible() {\n\t\tconst source = this._source;\n\t\tlet visibleRect = this.clone();\n\n\t\t// There's no ancestor to crop <body> with the overflow.\n\t\tif ( !isBody( source ) ) {\n\t\t\tlet parent = source.parentNode || source.commonAncestorContainer;\n\n\t\t\t// Check the ancestors all the way up to the <body>.\n\t\t\twhile ( parent && !isBody( parent ) ) {\n\t\t\t\tconst parentRect = new Rect( parent );\n\t\t\t\tconst intersectionRect = visibleRect.getIntersection( parentRect );\n\n\t\t\t\tif ( intersectionRect ) {\n\t\t\t\t\tif ( intersectionRect.getArea() < visibleRect.getArea() ) {\n\t\t\t\t\t\t// Reduce the visible rect to the intersection.\n\t\t\t\t\t\tvisibleRect = intersectionRect;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// There's no intersection, the rect is completely invisible.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tparent = parent.parentNode;\n\t\t\t}\n\t\t}\n\n\t\treturn visibleRect;\n\t}\n\n\t/**\n\t * Checks if all property values ({@link #top}, {@link #left}, {@link #right},\n\t * {@link #bottom}, {@link #width} and {@link #height}) are the equal in both rect\n\t * instances.\n\t *\n\t * @param {module:utils/dom/rect~Rect} rect A rect instance to compare with.\n\t * @returns {Boolean} `true` when Rects are equal. `false` otherwise.\n\t */\n\tisEqual( anotherRect ) {\n\t\tfor ( const prop of rectProperties ) {\n\t\t\tif ( this[ prop ] !== anotherRect[ prop ] ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether a rect fully contains another rect instance.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {Boolean} `true` if contains, `false` otherwise.\n\t */\n\tcontains( anotherRect ) {\n\t\tconst intersectRect = this.getIntersection( anotherRect );\n\n\t\treturn !!( intersectRect && intersectRect.isEqual( anotherRect ) );\n\t}\n\n\t/**\n\t * Excludes scrollbars and CSS borders from the rect.\n\t *\n\t * * Borders are removed when {@link #_source} is an HTML element.\n\t * * Scrollbars are excluded from HTML elements and the `window`.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been updated.\n\t */\n\texcludeScrollbarsAndBorders() {\n\t\tconst source = this._source;\n\t\tlet scrollBarWidth, scrollBarHeight, direction;\n\n\t\tif ( isWindow( source ) ) {\n\t\t\tscrollBarWidth = source.innerWidth - source.document.documentElement.clientWidth;\n\t\t\tscrollBarHeight = source.innerHeight - source.document.documentElement.clientHeight;\n\t\t\tdirection = source.getComputedStyle( source.document.documentElement ).direction;\n\t\t} else {\n\t\t\tconst borderWidths = getBorderWidths( this._source );\n\n\t\t\tscrollBarWidth = source.offsetWidth - source.clientWidth - borderWidths.left - borderWidths.right;\n\t\t\tscrollBarHeight = source.offsetHeight - source.clientHeight - borderWidths.top - borderWidths.bottom;\n\t\t\tdirection = source.ownerDocument.defaultView.getComputedStyle( source ).direction;\n\n\t\t\tthis.left += borderWidths.left;\n\t\t\tthis.top += borderWidths.top;\n\t\t\tthis.right -= borderWidths.right;\n\t\t\tthis.bottom -= borderWidths.bottom;\n\t\t\tthis.width = this.right - this.left;\n\t\t\tthis.height = this.bottom - this.top;\n\t\t}\n\n\t\tthis.width -= scrollBarWidth;\n\n\t\tif ( direction === 'ltr' ) {\n\t\t\tthis.right -= scrollBarWidth;\n\t\t} else {\n\t\t\tthis.left += scrollBarWidth;\n\t\t}\n\n\t\tthis.height -= scrollBarHeight;\n\t\tthis.bottom -= scrollBarHeight;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns an array of rects of the given native DOM Range.\n\t *\n\t * @param {Range} range A native DOM range.\n\t * @returns {Array.<module:utils/dom/rect~Rect>} DOM Range rects.\n\t */\n\tstatic getDomRangeRects( range ) {\n\t\tconst rects = [];\n\t\t// Safari does not iterate over ClientRectList using for...of loop.\n\t\tconst clientRects = Array.from( range.getClientRects() );\n\n\t\tif ( clientRects.length ) {\n\t\t\tfor ( const rect of clientRects ) {\n\t\t\t\trects.push( new Rect( rect ) );\n\t\t\t}\n\t\t}\n\t\t// If there's no client rects for the Range, use parent container's bounding rect\n\t\t// instead and adjust rect's width to simulate the actual geometry of such range.\n\t\t// https://github.com/ckeditor/ckeditor5-utils/issues/153\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/317\n\t\telse {\n\t\t\tlet startContainer = range.startContainer;\n\n\t\t\tif ( isText( startContainer ) ) {\n\t\t\t\tstartContainer = startContainer.parentNode;\n\t\t\t}\n\n\t\t\tconst rect = new Rect( startContainer.getBoundingClientRect() );\n\t\t\trect.right = rect.left;\n\t\t\trect.width = 0;\n\n\t\t\trects.push( rect );\n\t\t}\n\n\t\treturn rects;\n\t}\n}\n\n// Acquires all the rect properties from the passed source.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} rect\n// @param {ClientRect|module:utils/dom/rect~Rect|Object} source\nfunction copyRectProperties( rect, source ) {\n\tfor ( const p of rectProperties ) {\n\t\trect[ p ] = source[ p ];\n\t}\n}\n\n// Checks if provided object is a <body> HTML element.\n//\n// @private\n// @param {HTMLElement|Range} elementOrRange\n// @returns {Boolean}\nfunction isBody( elementOrRange ) {\n\tif ( !isElement( elementOrRange ) ) {\n\t\treturn false;\n\t}\n\n\treturn elementOrRange === elementOrRange.ownerDocument.body;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/scroll\n */\n\nimport isRange from './isrange';\nimport Rect from './rect';\nimport isText from './istext';\n\nconst utils = {};\n\n/**\n * Makes any page `HTMLElement` or `Range` (`target`) visible inside the browser viewport.\n * This helper will scroll all `target` ancestors and the web browser viewport to reveal the target to\n * the user. If the `target` is already visible, nothing will happen.\n *\n * @param {HTMLElement|Range} options.target A target, which supposed to become visible to the user.\n * @param {Number} [options.viewportOffset] An offset from the edge of the viewport (in pixels)\n * the `target` will be moved by when the viewport is scrolled. It enhances the user experience\n * by keeping the `target` some distance from the edge of the viewport and thus making it easier to\n * read or edit by the user.\n */\nexport function scrollViewportToShowTarget( { target, viewportOffset = 0 } ) {\n\tconst targetWindow = getWindow( target );\n\tlet currentWindow = targetWindow;\n\tlet currentFrame = null;\n\n\t// Iterate over all windows, starting from target's parent window up to window#top.\n\twhile ( currentWindow ) {\n\t\tlet firstAncestorToScroll;\n\n\t\t// Let's scroll target's ancestors first to reveal it. Then, once the ancestor scrolls\n\t\t// settled down, the algorithm can eventually scroll the viewport of the current window.\n\t\t//\n\t\t// Note: If the current window is target's **original** window (e.g. the first one),\n\t\t// start scrolling the closest parent of the target. If not, scroll the closest parent\n\t\t// of an iframe that resides in the current window.\n\t\tif ( currentWindow == targetWindow ) {\n\t\t\tfirstAncestorToScroll = getParentElement( target );\n\t\t} else {\n\t\t\tfirstAncestorToScroll = getParentElement( currentFrame );\n\t\t}\n\n\t\t// Scroll the target's ancestors first. Once done, scrolling the viewport is easy.\n\t\tscrollAncestorsToShowRect( firstAncestorToScroll, () => {\n\t\t\t// Note: If the target does not belong to the current window **directly**,\n\t\t\t// i.e. it resides in an iframe belonging to the window, obtain the target's rect\n\t\t\t// in the coordinates of the current window. By default, a Rect returns geometry\n\t\t\t// relative to the current window's viewport. To make it work in a parent window,\n\t\t\t// it must be shifted.\n\t\t\treturn getRectRelativeToWindow( target, currentWindow );\n\t\t} );\n\n\t\t// Obtain the rect of the target after it has been scrolled within its ancestors.\n\t\t// It's time to scroll the viewport.\n\t\tconst targetRect = getRectRelativeToWindow( target, currentWindow );\n\n\t\tscrollWindowToShowRect( currentWindow, targetRect, viewportOffset );\n\n\t\tif ( currentWindow.parent != currentWindow ) {\n\t\t\t// Keep the reference to the <iframe> element the \"previous current window\" was\n\t\t\t// rendered within. It will be useful to re–calculate the rect of the target\n\t\t\t// in the parent window's relative geometry. The target's rect must be shifted\n\t\t\t// by it's iframe's position.\n\t\t\tcurrentFrame = currentWindow.frameElement;\n\t\t\tcurrentWindow = currentWindow.parent;\n\n\t\t\t// If the current window has some parent but frameElement is inaccessible, then they have\n\t\t\t// different domains/ports and, due to security reasons, accessing and scrolling\n\t\t\t// the parent window won't be possible.\n\t\t\t// See https://github.com/ckeditor/ckeditor5/issues/930.\n\t\t\tif ( !currentFrame ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t} else {\n\t\t\tcurrentWindow = null;\n\t\t}\n\t}\n}\n\n/**\n * Makes any page `HTMLElement` or `Range` (target) visible within its scrollable ancestors,\n * e.g. if they have `overflow: scroll` CSS style.\n *\n * @param {HTMLElement|Range} target A target, which supposed to become visible to the user.\n */\nexport function scrollAncestorsToShowTarget( target ) {\n\tconst targetParent = getParentElement( target );\n\n\tscrollAncestorsToShowRect( targetParent, () => {\n\t\treturn new Rect( target );\n\t} );\n}\n\n// TODO: Using a property value shorthand in the top of the file\n// causes JSDoc to throw errors. See https://github.com/cksource/docs-builder/issues/75.\nObject.assign( utils, {\n\tscrollViewportToShowTarget,\n\tscrollAncestorsToShowTarget\n} );\n\n// Makes a given rect visible within its parent window.\n//\n// Note: Avoid the situation where the caret is still in the viewport, but totally\n// at the edge of it. In such situation, if it moved beyond the viewport in the next\n// action e.g. after paste, the scrolling would move it to the viewportOffset level\n// and it all would look like the caret visually moved up/down:\n//\n// 1.\n//\t\t| foo[]\n//\t\t| <--- N px of space below the caret\n//\t\t+---------------------------------...\n//\n// 2. *paste*\n// 3.\n//\t\t|\n//\t\t|\n//\t\t+-foo-----------------------------...\n//\t\t bar[] <--- caret below viewport, scrolling...\n//\n// 4. *scrolling*\n// 5.\n//\t\t|\n//\t\t| foo\n//\t\t| bar[] <--- caret precisely at the edge\n//\t\t+---------------------------------...\n//\n// To prevent this, this method checks the rects moved by the viewportOffset to cover\n// the upper/lower edge of the viewport. It makes sure if the action repeats, there's\n// no twitching – it's a purely visual improvement:\n//\n// 5. (after fix)\n//\t\t|\n//\t\t| foo\n//\t\t| bar[]\n//\t\t| <--- N px of space below the caret\n//\t\t+---------------------------------...\n//\n// @private\n// @param {Window} window A window which is scrolled to reveal the rect.\n// @param {module:utils/dom/rect~Rect} rect A rect which is to be revealed.\n// @param {Number} viewportOffset See scrollViewportToShowTarget.\nfunction scrollWindowToShowRect( window, rect, viewportOffset ) {\n\tconst targetShiftedDownRect = rect.clone().moveBy( 0, viewportOffset );\n\tconst targetShiftedUpRect = rect.clone().moveBy( 0, -viewportOffset );\n\tconst viewportRect = new Rect( window ).excludeScrollbarsAndBorders();\n\n\tconst rects = [ targetShiftedUpRect, targetShiftedDownRect ];\n\n\tif ( !rects.every( rect => viewportRect.contains( rect ) ) ) {\n\t\tlet { scrollX, scrollY } = window;\n\n\t\tif ( isAbove( targetShiftedUpRect, viewportRect ) ) {\n\t\t\tscrollY -= viewportRect.top - rect.top + viewportOffset;\n\t\t} else if ( isBelow( targetShiftedDownRect, viewportRect ) ) {\n\t\t\tscrollY += rect.bottom - viewportRect.bottom + viewportOffset;\n\t\t}\n\n\t\t// TODO: Web browsers scroll natively to place the target in the middle\n\t\t// of the viewport. It's not a very popular case, though.\n\t\tif ( isLeftOf( rect, viewportRect ) ) {\n\t\t\tscrollX -= viewportRect.left - rect.left + viewportOffset;\n\t\t} else if ( isRightOf( rect, viewportRect ) ) {\n\t\t\tscrollX += rect.right - viewportRect.right + viewportOffset;\n\t\t}\n\n\t\twindow.scrollTo( scrollX, scrollY );\n\t}\n}\n\n// Recursively scrolls element ancestors to visually reveal a rect.\n//\n// @private\n// @param {HTMLElement} A parent The first ancestors to start scrolling.\n// @param {Function} getRect A function which returns the Rect, which is to be revealed.\nfunction scrollAncestorsToShowRect( parent, getRect ) {\n\tconst parentWindow = getWindow( parent );\n\tlet parentRect, targetRect;\n\n\twhile ( parent != parentWindow.document.body ) {\n\t\ttargetRect = getRect();\n\t\tparentRect = new Rect( parent ).excludeScrollbarsAndBorders();\n\n\t\tif ( !parentRect.contains( targetRect ) ) {\n\t\t\tif ( isAbove( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollTop -= parentRect.top - targetRect.top;\n\t\t\t} else if ( isBelow( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollTop += targetRect.bottom - parentRect.bottom;\n\t\t\t}\n\n\t\t\tif ( isLeftOf( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollLeft -= parentRect.left - targetRect.left;\n\t\t\t} else if ( isRightOf( targetRect, parentRect ) ) {\n\t\t\t\tparent.scrollLeft += targetRect.right - parentRect.right;\n\t\t\t}\n\t\t}\n\n\t\tparent = parent.parentNode;\n\t}\n}\n\n// Determines if a given `Rect` extends beyond the bottom edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isBelow( firstRect, secondRect ) {\n\treturn firstRect.bottom > secondRect.bottom;\n}\n\n// Determines if a given `Rect` extends beyond the top edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isAbove( firstRect, secondRect ) {\n\treturn firstRect.top < secondRect.top;\n}\n\n// Determines if a given `Rect` extends beyond the left edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isLeftOf( firstRect, secondRect ) {\n\treturn firstRect.left < secondRect.left;\n}\n\n// Determines if a given `Rect` extends beyond the right edge of the second `Rect`.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} firstRect\n// @param {module:utils/dom/rect~Rect} secondRect\nfunction isRightOf( firstRect, secondRect ) {\n\treturn firstRect.right > secondRect.right;\n}\n\n// Returns the closest window of an element or range.\n//\n// @private\n// @param {HTMLElement|Range} firstRect\n// @returns {Window}\nfunction getWindow( elementOrRange ) {\n\tif ( isRange( elementOrRange ) ) {\n\t\treturn elementOrRange.startContainer.ownerDocument.defaultView;\n\t} else {\n\t\treturn elementOrRange.ownerDocument.defaultView;\n\t}\n}\n\n// Returns the closest parent of an element or DOM range.\n//\n// @private\n// @param {HTMLElement|Range} firstRect\n// @returns {HTMLelement}\nfunction getParentElement( elementOrRange ) {\n\tif ( isRange( elementOrRange ) ) {\n\t\tlet parent = elementOrRange.commonAncestorContainer;\n\n\t\t// If a Range is attached to the Text, use the closest element ancestor.\n\t\tif ( isText( parent ) ) {\n\t\t\tparent = parent.parentNode;\n\t\t}\n\n\t\treturn parent;\n\t} else {\n\t\treturn elementOrRange.parentNode;\n\t}\n}\n\n// Returns the rect of an element or range residing in an iframe.\n// The result rect is relative to the geometry of the passed window instance.\n//\n// @private\n// @param {HTMLElement|Range} target Element or range which rect should be returned.\n// @param {Window} relativeWindow A window the rect should be relative to.\n// @returns {module:utils/dom/rect~Rect}\nfunction getRectRelativeToWindow( target, relativeWindow ) {\n\tconst targetWindow = getWindow( target );\n\tconst rect = new Rect( target );\n\n\tif ( targetWindow === relativeWindow ) {\n\t\treturn rect;\n\t} else {\n\t\tlet currentWindow = targetWindow;\n\n\t\twhile ( currentWindow != relativeWindow ) {\n\t\t\tconst frame = currentWindow.frameElement;\n\t\t\tconst frameRect = new Rect( frame ).excludeScrollbarsAndBorders();\n\n\t\t\trect.moveBy( frameRect.left, frameRect.top );\n\n\t\t\tcurrentWindow = currentWindow.parent;\n\t\t}\n\t}\n\n\treturn rect;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/view\n */\n\nimport Document from './document';\nimport DowncastWriter from './downcastwriter';\nimport Renderer from './renderer';\nimport DomConverter from './domconverter';\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\n\nimport MutationObserver from './observer/mutationobserver';\nimport KeyObserver from './observer/keyobserver';\nimport FakeSelectionObserver from './observer/fakeselectionobserver';\nimport SelectionObserver from './observer/selectionobserver';\nimport FocusObserver from './observer/focusobserver';\nimport CompositionObserver from './observer/compositionobserver';\nimport InputObserver from './observer/inputobserver';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { scrollViewportToShowTarget } from '@ckeditor/ckeditor5-utils/src/dom/scroll';\nimport { injectUiElementHandling } from './uielement';\nimport { injectQuirksHandling } from './filler';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Editor's view controller class. Its main responsibility is DOM - View management for editing purposes, to provide\n * abstraction over the DOM structure and events and hide all browsers quirks.\n *\n * View controller renders view document to DOM whenever view structure changes. To determine when view can be rendered,\n * all changes need to be done using the {@link module:engine/view/view~View#change} method, using\n * {@link module:engine/view/downcastwriter~DowncastWriter}:\n *\n *\t\tview.change( writer => {\n *\t\t\twriter.insert( position, writer.createText( 'foo' ) );\n *\t\t} );\n *\n * View controller also register {@link module:engine/view/observer/observer~Observer observers} which observes changes\n * on DOM and fire events on the {@link module:engine/view/document~Document Document}.\n * Note that the following observers are added by the class constructor and are always available:\n *\n * * {@link module:engine/view/observer/mutationobserver~MutationObserver},\n * * {@link module:engine/view/observer/selectionobserver~SelectionObserver},\n * * {@link module:engine/view/observer/focusobserver~FocusObserver},\n * * {@link module:engine/view/observer/keyobserver~KeyObserver},\n * * {@link module:engine/view/observer/fakeselectionobserver~FakeSelectionObserver}.\n * * {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * This class also {@link module:engine/view/view~View#attachDomRoot binds the DOM and the view elements}.\n *\n * If you do not need full a DOM - view management, and only want to transform a tree of view elements to a tree of DOM\n * elements you do not need this controller. You can use the {@link module:engine/view/domconverter~DomConverter DomConverter} instead.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class View {\n\tconstructor() {\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/document~Document} associated with this view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = new Document();\n\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/domconverter~DomConverter domConverter} used by\n\t\t * {@link module:engine/view/view~View#_renderer renderer}\n\t\t * and {@link module:engine/view/observer/observer~Observer observers}.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = new DomConverter();\n\n\t\t/**\n\t\t * Roots of the DOM tree. Map on the `HTMLElement`s with roots names as keys.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Map.<String, HTMLElement>}\n\t\t */\n\t\tthis.domRoots = new Map();\n\n\t\t/**\n\t\t * Used to prevent calling {@link #forceRender} and {@link #change} during rendering view to the DOM.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isRenderingInProgress\n\t\t */\n\t\tthis.set( 'isRenderingInProgress', false );\n\n\t\t/**\n\t\t * Instance of the {@link module:engine/view/renderer~Renderer renderer}.\n\t\t *\n\t\t * @protected\n\t\t * @type {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis._renderer = new Renderer( this.domConverter, this.document.selection );\n\t\tthis._renderer.bind( 'isFocused' ).to( this.document );\n\n\t\t/**\n\t\t * A DOM root attributes cache. It saves the initial values of DOM root attributes before the DOM element\n\t\t * is {@link module:engine/view/view~View#attachDomRoot attached} to the view so later on, when\n\t\t * the view is destroyed ({@link module:engine/view/view~View#detachDomRoot}), they can be easily restored.\n\t\t * This way, the DOM element can go back to the (clean) state as if the editing view never used it.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap.<HTMLElement,Object>}\n\t\t */\n\t\tthis._initialDomRootAttributes = new WeakMap();\n\n\t\t/**\n\t\t * Map of registered {@link module:engine/view/observer/observer~Observer observers}.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<Function, module:engine/view/observer/observer~Observer>}\n\t\t */\n\t\tthis._observers = new Map();\n\n\t\t/**\n\t\t * Is set to `true` when {@link #change view changes} are currently in progress.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._ongoingChange = false;\n\n\t\t/**\n\t\t * Used to prevent calling {@link #forceRender} and {@link #change} during rendering view to the DOM.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._postFixersInProgress = false;\n\n\t\t/**\n\t\t * Internal flag to temporary disable rendering. See the usage in the {@link #_disableRendering}.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._renderingDisabled = false;\n\n\t\t/**\n\t\t * Internal flag that disables rendering when there are no changes since the last rendering.\n\t\t * It stores information about changed selection and changed elements from attached document roots.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._hasChangedSinceTheLastRendering = false;\n\n\t\t/**\n\t\t * DowncastWriter instance used in {@link #change change method} callbacks.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/view/downcastwriter~DowncastWriter}\n\t\t */\n\t\tthis._writer = new DowncastWriter( this.document );\n\n\t\t// Add default observers.\n\t\tthis.addObserver( MutationObserver );\n\t\tthis.addObserver( SelectionObserver );\n\t\tthis.addObserver( FocusObserver );\n\t\tthis.addObserver( KeyObserver );\n\t\tthis.addObserver( FakeSelectionObserver );\n\t\tthis.addObserver( CompositionObserver );\n\n\t\tif ( env.isAndroid ) {\n\t\t\tthis.addObserver( InputObserver );\n\t\t}\n\n\t\t// Inject quirks handlers.\n\t\tinjectQuirksHandling( this );\n\t\tinjectUiElementHandling( this );\n\n\t\t// Use 'normal' priority so that rendering is performed as first when using that priority.\n\t\tthis.on( 'render', () => {\n\t\t\tthis._render();\n\n\t\t\t// Informs that layout has changed after render.\n\t\t\tthis.document.fire( 'layoutChanged' );\n\n\t\t\t// Reset the `_hasChangedSinceTheLastRendering` flag after rendering.\n\t\t\tthis._hasChangedSinceTheLastRendering = false;\n\t\t} );\n\n\t\t// Listen to the document selection changes directly.\n\t\tthis.listenTo( this.document.selection, 'change', () => {\n\t\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\t} );\n\t}\n\n\t/**\n\t * Attaches a DOM root element to the view element and enable all observers on that element.\n\t * Also {@link module:engine/view/renderer~Renderer#markToSync mark element} to be synchronized\n\t * with the view what means that all child nodes will be removed and replaced with content of the view root.\n\t *\n\t * This method also will change view element name as the same as tag name of given dom root.\n\t * Name is always transformed to lower case.\n\t *\n\t * **Note:** Use {@link #detachDomRoot `detachDomRoot()`} to revert this action.\n\t *\n\t * @param {Element} domRoot DOM root element.\n\t * @param {String} [name='main'] Name of the root.\n\t */\n\tattachDomRoot( domRoot, name = 'main' ) {\n\t\tconst viewRoot = this.document.getRoot( name );\n\n\t\t// Set view root name the same as DOM root tag name.\n\t\tviewRoot._name = domRoot.tagName.toLowerCase();\n\n\t\tconst initialDomRootAttributes = {};\n\n\t\t// 1. Copy and cache the attributes to remember the state of the element before attaching.\n\t\t// The cached attributes will be restored in detachDomRoot() so the element goes to the\n\t\t// clean state as if the editing view never used it.\n\t\t// 2. Apply the attributes using the view writer, so they all go under the control of the engine.\n\t\t// The editing view takes over the attribute management completely because various\n\t\t// features (e.g. addPlaceholder()) require dynamic changes of those attributes and they\n\t\t// cannot be managed by the engine and the UI library at the same time.\n\t\tfor ( const { name, value } of Array.from( domRoot.attributes ) ) {\n\t\t\tinitialDomRootAttributes[ name ] = value;\n\n\t\t\t// Do not use writer.setAttribute() for the class attribute. The EditableUIView class\n\t\t\t// and its descendants could have already set some using the writer.addClass() on the view\n\t\t\t// document root. They haven't been rendered yet so they are not present in the DOM root.\n\t\t\t// Using writer.setAttribute( 'class', ... ) would override them completely.\n\t\t\tif ( name === 'class' ) {\n\t\t\t\tthis._writer.addClass( value.split( ' ' ), viewRoot );\n\t\t\t} else {\n\t\t\t\tthis._writer.setAttribute( name, value, viewRoot );\n\t\t\t}\n\t\t}\n\n\t\tthis._initialDomRootAttributes.set( domRoot, initialDomRootAttributes );\n\n\t\tconst updateContenteditableAttribute = () => {\n\t\t\tthis._writer.setAttribute( 'contenteditable', !viewRoot.isReadOnly, viewRoot );\n\n\t\t\tif ( viewRoot.isReadOnly ) {\n\t\t\t\tthis._writer.addClass( 'ck-read-only', viewRoot );\n\t\t\t} else {\n\t\t\t\tthis._writer.removeClass( 'ck-read-only', viewRoot );\n\t\t\t}\n\t\t};\n\n\t\t// Set initial value.\n\t\tupdateContenteditableAttribute();\n\n\t\tthis.domRoots.set( name, domRoot );\n\t\tthis.domConverter.bindElements( domRoot, viewRoot );\n\t\tthis._renderer.markToSync( 'children', viewRoot );\n\t\tthis._renderer.markToSync( 'attributes', viewRoot );\n\t\tthis._renderer.domDocuments.add( domRoot.ownerDocument );\n\n\t\tviewRoot.on( 'change:children', ( evt, node ) => this._renderer.markToSync( 'children', node ) );\n\t\tviewRoot.on( 'change:attributes', ( evt, node ) => this._renderer.markToSync( 'attributes', node ) );\n\t\tviewRoot.on( 'change:text', ( evt, node ) => this._renderer.markToSync( 'text', node ) );\n\t\tviewRoot.on( 'change:isReadOnly', () => this.change( updateContenteditableAttribute ) );\n\n\t\tviewRoot.on( 'change', () => {\n\t\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\t} );\n\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.observe( domRoot, name );\n\t\t}\n\t}\n\n\t/**\n\t * Detaches a DOM root element from the view element and restores its attributes to the state before\n\t * {@link #attachDomRoot `attachDomRoot()`}.\n\t *\n\t * @param {String} name Name of the root to detach.\n\t */\n\tdetachDomRoot( name ) {\n\t\tconst domRoot = this.domRoots.get( name );\n\n\t\t// Remove all root attributes so the DOM element is \"bare\".\n\t\tArray.from( domRoot.attributes ).forEach( ( { name } ) => domRoot.removeAttribute( name ) );\n\n\t\tconst initialDomRootAttributes = this._initialDomRootAttributes.get( domRoot );\n\n\t\t// Revert all view root attributes back to the state before attachDomRoot was called.\n\t\tfor ( const attribute in initialDomRootAttributes ) {\n\t\t\tdomRoot.setAttribute( attribute, initialDomRootAttributes[ attribute ] );\n\t\t}\n\n\t\tthis.domRoots.delete( name );\n\t\tthis.domConverter.unbindDomElement( domRoot );\n\t}\n\n\t/**\n\t * Gets DOM root element.\n\t *\n\t * @param {String} [name='main'] Name of the root.\n\t * @returns {Element} DOM root element instance.\n\t */\n\tgetDomRoot( name = 'main' ) {\n\t\treturn this.domRoots.get( name );\n\t}\n\n\t/**\n\t * Creates observer of the given type if not yet created, {@link module:engine/view/observer/observer~Observer#enable enables} it\n\t * and {@link module:engine/view/observer/observer~Observer#observe attaches} to all existing and future\n\t * {@link #domRoots DOM roots}.\n\t *\n\t * Note: Observers are recognized by their constructor (classes). A single observer will be instantiated and used only\n\t * when registered for the first time. This means that features and other components can register a single observer\n\t * multiple times without caring whether it has been already added or not.\n\t *\n\t * @param {Function} Observer The constructor of an observer to add.\n\t * Should create an instance inheriting from {@link module:engine/view/observer/observer~Observer}.\n\t * @returns {module:engine/view/observer/observer~Observer} Added observer instance.\n\t */\n\taddObserver( Observer ) {\n\t\tlet observer = this._observers.get( Observer );\n\n\t\tif ( observer ) {\n\t\t\treturn observer;\n\t\t}\n\n\t\tobserver = new Observer( this );\n\n\t\tthis._observers.set( Observer, observer );\n\n\t\tfor ( const [ name, domElement ] of this.domRoots ) {\n\t\t\tobserver.observe( domElement, name );\n\t\t}\n\n\t\tobserver.enable();\n\n\t\treturn observer;\n\t}\n\n\t/**\n\t * Returns observer of the given type or `undefined` if such observer has not been added yet.\n\t *\n\t * @param {Function} Observer The constructor of an observer to get.\n\t * @returns {module:engine/view/observer/observer~Observer|undefined} Observer instance or undefined.\n\t */\n\tgetObserver( Observer ) {\n\t\treturn this._observers.get( Observer );\n\t}\n\n\t/**\n\t * Disables all added observers.\n\t */\n\tdisableObservers() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.disable();\n\t\t}\n\t}\n\n\t/**\n\t * Enables all added observers.\n\t */\n\tenableObservers() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.enable();\n\t\t}\n\t}\n\n\t/**\n\t * Scrolls the page viewport and {@link #domRoots} with their ancestors to reveal the\n\t * caret, if not already visible to the user.\n\t */\n\tscrollToTheSelection() {\n\t\tconst range = this.document.selection.getFirstRange();\n\n\t\tif ( range ) {\n\t\t\tscrollViewportToShowTarget( {\n\t\t\t\ttarget: this.domConverter.viewRangeToDom( range ),\n\t\t\t\tviewportOffset: 20\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * It will focus DOM element representing {@link module:engine/view/editableelement~EditableElement EditableElement}\n\t * that is currently having selection inside.\n\t */\n\tfocus() {\n\t\tif ( !this.document.isFocused ) {\n\t\t\tconst editable = this.document.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t\tthis.forceRender();\n\t\t\t} else {\n\t\t\t\t// Before focusing view document, selection should be placed inside one of the view's editables.\n\t\t\t\t// Normally its selection will be converted from model document (which have default selection), but\n\t\t\t\t// when using view document on its own, we need to manually place selection before focusing it.\n\t\t\t\t//\n\t\t\t\t// @if CK_DEBUG // console.warn( 'There is no selection in any editable to focus.' );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * The `change()` method is the primary way of changing the view. You should use it to modify any node in the view tree.\n\t * It makes sure that after all changes are made the view is rendered to the DOM (assuming that the view will be changed\n\t * inside the callback). It prevents situations when the DOM is updated when the view state is not yet correct. It allows\n\t * to nest calls one inside another and still performs a single rendering after all those changes are made.\n\t * It also returns the return value of its callback.\n\t *\n\t *\t\tconst text = view.change( writer => {\n\t *\t\t\tconst newText = writer.createText( 'foo' );\n\t *\t\t\twriter.insert( position1, newText );\n\t *\n\t *\t\t\tview.change( writer => {\n\t *\t\t\t\twriter.insert( position2, writer.createText( 'bar' ) );\n\t *\t\t\t} );\n\t *\n\t * \t\t\twriter.remove( range );\n\t *\n\t * \t\t\treturn newText;\n\t *\t\t} );\n\t *\n\t * When the outermost change block is done and rendering to the DOM is over the\n\t * {@link module:engine/view/view~View#event:render `View#render`} event is fired.\n\t *\n\t * This method throws a `applying-view-changes-on-rendering` error when\n\t * the change block is used after rendering to the DOM has started.\n\t *\n\t * @param {Function} callback Callback function which may modify the view.\n\t * @returns {*} Value returned by the callback.\n\t */\n\tchange( callback ) {\n\t\tif ( this.isRenderingInProgress || this._postFixersInProgress ) {\n\t\t\t/**\n\t\t\t * Thrown when there is an attempt to make changes to the view tree when it is in incorrect state. This may\n\t\t\t * cause some unexpected behaviour and inconsistency between the DOM and the view.\n\t\t\t * This may be caused by:\n\t\t\t *\n\t\t\t * * calling {@link #change} or {@link #forceRender} during rendering process,\n\t\t\t * * calling {@link #change} or {@link #forceRender} inside of\n\t\t\t * {@link module:engine/view/document~Document#registerPostFixer post-fixer function}.\n\t\t\t *\n\t\t\t * @error cannot-change-view-tree\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'cannot-change-view-tree: ' +\n\t\t\t\t'Attempting to make changes to the view when it is in an incorrect state: rendering or post-fixers are in progress. ' +\n\t\t\t\t'This may cause some unexpected behavior and inconsistency between the DOM and the view.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\ttry {\n\t\t\t// Recursive call to view.change() method - execute listener immediately.\n\t\t\tif ( this._ongoingChange ) {\n\t\t\t\treturn callback( this._writer );\n\t\t\t}\n\n\t\t\t// This lock will assure that all recursive calls to view.change() will end up in same block - one \"render\"\n\t\t\t// event for all nested calls.\n\t\t\tthis._ongoingChange = true;\n\t\t\tconst callbackResult = callback( this._writer );\n\t\t\tthis._ongoingChange = false;\n\n\t\t\t// This lock is used by editing controller to render changes from outer most model.change() once. As plugins might call\n\t\t\t// view.change() inside model.change() block - this will ensures that postfixers and rendering are called once after all\n\t\t\t// changes. Also, we don't need to render anything if there're no changes since last rendering.\n\t\t\tif ( !this._renderingDisabled && this._hasChangedSinceTheLastRendering ) {\n\t\t\t\tthis._postFixersInProgress = true;\n\t\t\t\tthis.document._callPostFixers( this._writer );\n\t\t\t\tthis._postFixersInProgress = false;\n\n\t\t\t\tthis.fire( 'render' );\n\t\t\t}\n\n\t\t\treturn callbackResult;\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * Forces rendering {@link module:engine/view/document~Document view document} to DOM. If any view changes are\n\t * currently in progress, rendering will start after all {@link #change change blocks} are processed.\n\t *\n\t * Note that this method is dedicated for special cases. All view changes should be wrapped in the {@link #change}\n\t * block and the view will automatically check whether it needs to render DOM or not.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `applying-view-changes-on-rendering` when\n\t * trying to re-render when rendering to DOM has already started.\n\t */\n\tforceRender() {\n\t\tthis._hasChangedSinceTheLastRendering = true;\n\t\tthis.change( () => {} );\n\t}\n\n\t/**\n\t * Destroys this instance. Makes sure that all observers are destroyed and listeners removed.\n\t */\n\tdestroy() {\n\t\tfor ( const observer of this._observers.values() ) {\n\t\t\tobserver.destroy();\n\t\t}\n\n\t\tthis.document.destroy();\n\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t Creates new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = view.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = view.createRange( start, end );\n\t *\t\tconst selection = view.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ view.createRange( start1, end2 ), view.createRange( star2, end2 ) ];\n\t *\t\tconst selection = view.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = view.createSelection();\n\t *\t\tconst selection = view.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = view.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = view.createPositionFromPath( root, path );\n\t *\t\tconst selection = view.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = view.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = view.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = view.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = view.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s factory method allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = view.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = view.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Disables or enables rendering. If the flag is set to `true` then the rendering will be disabled.\n\t * If the flag is set to `false` and if there was some change in the meantime, then the rendering action will be performed.\n\t *\n\t * @protected\n\t * @param {Boolean} flag A flag indicates whether the rendering should be disabled.\n\t */\n\t_disableRendering( flag ) {\n\t\tthis._renderingDisabled = flag;\n\n\t\tif ( flag == false ) {\n\t\t\t// Render when you stop blocking rendering.\n\t\t\tthis.change( () => {} );\n\t\t}\n\t}\n\n\t/**\n\t * Renders all changes. In order to avoid triggering the observers (e.g. mutations) all observers are disabled\n\t * before rendering and re-enabled after that.\n\t *\n\t * @private\n\t */\n\t_render() {\n\t\tthis.isRenderingInProgress = true;\n\t\tthis.disableObservers();\n\t\tthis._renderer.render();\n\t\tthis.enableObservers();\n\t\tthis.isRenderingInProgress = false;\n\t}\n\n\t/**\n\t * Fired after a topmost {@link module:engine/view/view~View#change change block} and all\n\t * {@link module:engine/view/document~Document#registerPostFixer post-fixers} are executed.\n\t *\n\t * Actual rendering is performed as a first listener on 'normal' priority.\n\t *\n\t *\t\tview.on( 'render', () => {\n\t *\t\t\t// Rendering to the DOM is complete.\n\t *\t\t} );\n\t *\n\t * This event is useful when you want to update interface elements after the rendering, e.g. position of the\n\t * balloon panel. If you wants to change view structure use\n\t * {@link module:engine/view/document~Document#registerPostFixer post-fixers}.\n\t *\n\t * @event module:engine/view/view~View#event:render\n\t */\n}\n\nmix( View, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/tomap\n */\n\nimport objectToMap from './objecttomap';\nimport { isPlainObject } from 'lodash-es';\n\n/**\n * Transforms object or iterable to map. Iterable needs to be in the format acceptable by the `Map` constructor.\n *\n *\t\tmap = toMap( { 'foo': 1, 'bar': 2 } );\n *\t\tmap = toMap( [ [ 'foo', 1 ], [ 'bar', 2 ] ] );\n *\t\tmap = toMap( anotherMap );\n *\n * @param {Object|Iterable} data Object or iterable to transform.\n * @returns {Map} Map created from data.\n */\nexport default function toMap( data ) {\n\tif ( isPlainObject( data ) ) {\n\t\treturn objectToMap( data );\n\t} else {\n\t\treturn new Map( data );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/node\n */\n\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Model node. Most basic structure of model tree.\n *\n * This is an abstract class that is a base for other classes representing different nodes in model.\n *\n * **Note:** If a node is detached from the model tree, you can manipulate it using it's API.\n * However, it is **very important** that nodes already attached to model tree should be only changed through\n * {@link module:engine/model/writer~Writer Writer API}.\n *\n * Changes done by `Node` methods, like {@link module:engine/model/element~Element#_insertChild _insertChild} or\n * {@link module:engine/model/node~Node#_setAttribute _setAttribute}\n * do not generate {@link module:engine/model/operation/operation~Operation operations}\n * which are essential for correct editor work if you modify nodes in {@link module:engine/model/document~Document document} root.\n *\n * The flow of working on `Node` (and classes that inherits from it) is as such:\n * 1. You can create a `Node` instance, modify it using it's API.\n * 2. Add `Node` to the model using `Batch` API.\n * 3. Change `Node` that was already added to the model using `Batch` API.\n *\n * Similarly, you cannot use `Batch` API on a node that has not been added to the model tree, with the exception\n * of {@link module:engine/model/writer~Writer#insert inserting} that node to the model tree.\n *\n * Be aware that using {@link module:engine/model/writer~Writer#remove remove from Batch API} does not allow to use `Node` API because\n * the information about `Node` is still kept in model document.\n *\n * In case of {@link module:engine/model/element~Element element node}, adding and removing children also counts as changing a node and\n * follows same rules.\n */\nexport default class Node {\n\t/**\n\t * Creates a model node.\n\t *\n\t * This is an abstract class, so this constructor should not be used directly.\n\t *\n\t * @abstract\n\t * @param {Object} [attrs] Node's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\tconstructor( attrs ) {\n\t\t/**\n\t\t * Parent of this node. It could be {@link module:engine/model/element~Element}\n\t\t * or {@link module:engine/model/documentfragment~DocumentFragment}.\n\t\t * Equals to `null` if the node has no parent.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t\t */\n\t\tthis.parent = null;\n\n\t\t/**\n\t\t * Attributes set on this node.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/model/node~Node#_attrs\n\t\t */\n\t\tthis._attrs = toMap( attrs );\n\t}\n\n\t/**\n\t * Index of this node in it's parent or `null` if the node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that model tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget index() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( ( pos = this.parent.getChildIndex( this ) ) === null ) {\n\t\t\tthrow new CKEditorError( 'model-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Offset at which this node starts in it's parent. It is equal to the sum of {@link #offsetSize offsetSize}\n\t * of all it's previous siblings. Equals to `null` if node has no parent.\n\t *\n\t * Accessing this property throws an error if this node's parent element does not contain it.\n\t * This means that model tree got broken.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget startOffset() {\n\t\tlet pos;\n\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( ( pos = this.parent.getChildStartOffset( this ) ) === null ) {\n\t\t\tthrow new CKEditorError( 'model-node-not-found-in-parent: The node\\'s parent does not contain this node.', this );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Offset size of this node. Represents how much \"offset space\" is occupied by the node in it's parent.\n\t * It is important for {@link module:engine/model/position~Position position}. When node has `offsetSize` greater than `1`, position\n\t * can be placed between that node start and end. `offsetSize` greater than `1` is for nodes that represents more\n\t * than one entity, i.e. {@link module:engine/model/text~Text text node}.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn 1;\n\t}\n\n\t/**\n\t * Offset at which this node ends in it's parent. It is equal to the sum of this node's\n\t * {@link module:engine/model/node~Node#startOffset start offset} and {@link #offsetSize offset size}.\n\t * Equals to `null` if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget endOffset() {\n\t\tif ( !this.parent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.startOffset + this.offsetSize;\n\t}\n\n\t/**\n\t * Node's next sibling or `null` if the node is a last child of it's parent or if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget nextSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index + 1 ) ) || null;\n\t}\n\n\t/**\n\t * Node's previous sibling or `null` if the node is a first child of it's parent or if the node has no parent.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget previousSibling() {\n\t\tconst index = this.index;\n\n\t\treturn ( index !== null && this.parent.getChild( index - 1 ) ) || null;\n\t}\n\n\t/**\n\t * The top-most ancestor of the node. If node has no parent it is the root itself. If the node is a part\n\t * of {@link module:engine/model/documentfragment~DocumentFragment}, it's `root` is equal to that `DocumentFragment`.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\tlet root = this; // eslint-disable-line consistent-this\n\n\t\twhile ( root.parent ) {\n\t\t\troot = root.parent;\n\t\t}\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns this node or `null` if the node has no parent or is inside\n\t * a {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\t// This is a top element of a sub-tree.\n\t\tif ( this.root == this ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Root may be `DocumentFragment` which does not have document property.\n\t\treturn this.root.document || null;\n\t}\n\n\t/**\n\t * Gets path to the node. The path is an array containing starting offsets of consecutive ancestors of this node,\n\t * beginning from {@link module:engine/model/node~Node#root root}, down to this node's starting offset. The path can be used to\n\t * create {@link module:engine/model/position~Position Position} instance.\n\t *\n\t *\t\tconst abc = new Text( 'abc' );\n\t *\t\tconst foo = new Text( 'foo' );\n\t *\t\tconst h1 = new Element( 'h1', null, new Text( 'header' ) );\n\t *\t\tconst p = new Element( 'p', null, [ abc, foo ] );\n\t *\t\tconst div = new Element( 'div', null, [ h1, p ] );\n\t *\t\tfoo.getPath(); // Returns [ 1, 3 ]. `foo` is in `p` which is in `div`. `p` starts at offset 1, while `foo` at 3.\n\t *\t\th1.getPath(); // Returns [ 0 ].\n\t *\t\tdiv.getPath(); // Returns [].\n\t *\n\t * @returns {Array.<Number>} The path.\n\t */\n\tgetPath() {\n\t\tconst path = [];\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\twhile ( node.parent ) {\n\t\t\tpath.unshift( node.startOffset );\n\t\t\tnode = node.parent;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this node.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this node will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from node's parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both nodes.\n\t *\n\t * @param {module:engine/model/node~Node} node The second node.\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` both nodes will be considered \"ancestors\" too.\n\t * Which means that if e.g. node A is inside B, then their common ancestor will be B.\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( node, options = {} ) {\n\t\tconst ancestorsA = this.getAncestors( options );\n\t\tconst ancestorsB = node.getAncestors( options );\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns whether this node is before given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/model/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/model/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisBefore( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisPath = this.getPath();\n\t\tconst nodePath = node.getPath();\n\n\t\tconst result = compareArrays( thisPath, nodePath );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'prefix':\n\t\t\t\treturn true;\n\n\t\t\tcase 'extension':\n\t\t\t\treturn false;\n\n\t\t\tdefault:\n\t\t\t\treturn thisPath[ result ] < nodePath[ result ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns whether this node is after given node. `false` is returned if nodes are in different trees (for example,\n\t * in different {@link module:engine/model/documentfragment~DocumentFragment}s).\n\t *\n\t * @param {module:engine/model/node~Node} node Node to compare with.\n\t * @returns {Boolean}\n\t */\n\tisAfter( node ) {\n\t\t// Given node is not before this node if they are same.\n\t\tif ( this == node ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Return `false` if it is impossible to compare nodes.\n\t\tif ( this.root !== node.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// In other cases, just check if the `node` is before, and return the opposite.\n\t\treturn !this.isBefore( node );\n\t}\n\n\t/**\n\t * Checks if the node has an attribute with given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on node, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on node.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._attrs.entries();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._attrs.keys();\n\t}\n\n\t/**\n\t * Converts `Node` to plain object and returns it.\n\t *\n\t * @returns {Object} `Node` converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = {};\n\n\t\t// Serializes attributes to the object.\n\t\t// attributes = { a: 'foo', b: 1, c: true }.\n\t\tif ( this._attrs.size ) {\n\t\t\tjson.attributes = Array.from( this._attrs ).reduce( ( result, attr ) => {\n\t\t\t\tresult[ attr[ 0 ] ] = attr[ 1 ];\n\n\t\t\t\treturn result;\n\t\t\t}, {} );\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t * This method is useful when processing model objects that are of unknown type. For example, a function\n\t * may return a {@link module:engine/model/documentfragment~DocumentFragment} or a {@link module:engine/model/node~Node}\n\t * that can be either a text node or an element. This method can be used to check what kind of object is returned.\n\t *\n\t *\t\tsomeObject.is( 'element' ); // -> true if this is an element\n\t *\t\tsomeObject.is( 'node' ); // -> true if this is a node (a text node or an element)\n\t *\t\tsomeObject.is( 'documentFragment' ); // -> true if this is a document fragment\n\t *\n\t * Since this method is also available on a range of view objects, you can prefix the type of the object with\n\t * `model:` or `view:` to check, for example, if this is the model's or view's element:\n\t *\n\t *\t\tmodelElement.is( 'model:element' ); // -> true\n\t *\t\tmodelElement.is( 'view:element' ); // -> false\n\t *\n\t * By using this method it is also possible to check a name of an element:\n\t *\n\t *\t\timageElement.is( 'image' ); // -> true\n\t *\t\timageElement.is( 'element', 'image' ); // -> same as above\n\t *\t\timageElement.is( 'model:element', 'image' ); // -> same as above, but more precise\n\t *\n\t * The list of model objects which implement the `is()` method:\n\t *\n\t * * {@link module:engine/model/node~Node#is `Node#is()`}\n\t * * {@link module:engine/model/text~Text#is `Text#is()`}\n\t * * {@link module:engine/model/element~Element#is `Element#is()`}\n\t * * {@link module:engine/model/rootelement~RootElement#is `RootElement#is()`}\n\t * * {@link module:engine/model/position~Position#is `Position#is()`}\n\t * * {@link module:engine/model/liveposition~LivePosition#is `LivePosition#is()`}\n\t * * {@link module:engine/model/range~Range#is `Range#is()`}\n\t * * {@link module:engine/model/liverange~LiveRange#is `LiveRange#is()`}\n\t * * {@link module:engine/model/documentfragment~DocumentFragment#is `DocumentFragment#is()`}\n\t * * {@link module:engine/model/selection~Selection#is `Selection#is()`}\n\t * * {@link module:engine/model/documentselection~DocumentSelection#is `DocumentSelection#is()`}\n\t * * {@link module:engine/model/markercollection~Marker#is `Marker#is()`}\n\t * * {@link module:engine/model/textproxy~TextProxy#is `TextProxy#is()`}\n\t *\n\t * @method #is\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'node' || type == 'model:node';\n\t}\n\n\t/**\n\t * Creates a copy of this node, that is a node with exactly same attributes, and returns it.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/node~Node} Node with same attributes as this node.\n\t */\n\t_clone() {\n\t\treturn new Node( this._attrs );\n\t}\n\n\t/**\n\t * Removes this node from it's parent.\n\t *\n\t * @see module:engine/model/writer~Writer#remove\n\t * @protected\n\t */\n\t_remove() {\n\t\tthis.parent._removeChildren( this.index );\n\t}\n\n\t/**\n\t * Sets attribute on the node. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * @see module:engine/model/writer~Writer#setAttribute\n\t * @protected\n\t * @param {String} key Key of attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\t_setAttribute( key, value ) {\n\t\tthis._attrs.set( key, value );\n\t}\n\n\t/**\n\t * Removes all attributes from the node and sets given attributes.\n\t *\n\t * @see module:engine/model/writer~Writer#setAttributes\n\t * @protected\n\t * @param {Object} [attrs] Attributes to set. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\t_setAttributesTo( attrs ) {\n\t\tthis._attrs = toMap( attrs );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the node.\n\t *\n\t * @see module:engine/model/writer~Writer#removeAttribute\n\t * @protected\n\t * @param {String} key Key of attribute to remove.\n\t * @returns {Boolean} `true` if the attribute was set on the element, `false` otherwise.\n\t */\n\t_removeAttribute( key ) {\n\t\treturn this._attrs.delete( key );\n\t}\n\n\t/**\n\t * Removes all attributes from the node.\n\t *\n\t * @see module:engine/model/writer~Writer#clearAttributes\n\t * @protected\n\t */\n\t_clearAttributes() {\n\t\tthis._attrs.clear();\n\t}\n}\n\n/**\n * The node's parent does not contain this node.\n *\n * This error may be thrown from corrupted trees.\n *\n * @error model-node-not-found-in-parent\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/text\n */\n\nimport Node from './node';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToStringifiedObject } = require( '../dev-utils/utils' );\n\n/**\n * Model text node. Type of {@link module:engine/model/node~Node node} that contains {@link module:engine/model/text~Text#data text data}.\n *\n * **Important:** see {@link module:engine/model/node~Node} to read about restrictions using `Text` and `Node` API.\n *\n * **Note:** keep in mind that `Text` instances might indirectly got removed from model tree when model is changed.\n * This happens when {@link module:engine/model/writer~Writer model writer} is used to change model and the text node is merged with\n * another text node. Then, both text nodes are removed and a new text node is inserted into the model. Because of\n * this behavior, keeping references to `Text` is not recommended. Instead, consider creating\n * {@link module:engine/model/liveposition~LivePosition live position} placed before the text node.\n *\n * @extends module:engine/model/node~Node\n */\nexport default class Text extends Node {\n\t/**\n\t * Creates a text node.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createText} method instead.\n\t *\n\t * @protected\n\t * @param {String} data Node's text.\n\t * @param {Object} [attrs] Node's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\tconstructor( data, attrs ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Text data contained in this text node.\n\t\t *\n\t\t * @protected\n\t\t * @type {String}\n\t\t */\n\t\tthis._data = data || '';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Returns a text data contained in the node.\n\t *\n\t * @readonly\n\t * @type {String}\n\t */\n\tget data() {\n\t\treturn this._data;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\ttext.is( 'text' ); // -> true\n\t *\t\ttext.is( 'node' ); // -> true\n\t *\t\ttext.is( 'model:text' ); // -> true\n\t *\t\ttext.is( 'model:node' ); // -> true\n\t *\n\t *\t\ttext.is( 'view:text' ); // -> false\n\t *\t\ttext.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'text' || type == 'model:text' || super.is( type );\n\t}\n\n\t/**\n\t * Converts `Text` instance to plain object and returns it.\n\t *\n\t * @returns {Object} `Text` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.data = this.data;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a copy of this text node and returns it. Created text node has same text data and attributes as original text node.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/text~Text} `Text` instance created using given plain object.\n\t */\n\t_clone() {\n\t\treturn new Text( this.data, this.getAttributes() );\n\t}\n\n\t/**\n\t * Creates a `Text` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Text`.\n\t * @returns {module:engine/model/text~Text} `Text` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\treturn new Text( json.data, json.attributes );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelText: ${ this }, attrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelText: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/textproxy\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const { convertMapToStringifiedObject } = require( '../dev-utils/utils' );\n\n/**\n * `TextProxy` represents a part of {@link module:engine/model/text~Text text node}.\n *\n * Since {@link module:engine/model/position~Position positions} can be placed between characters of a text node,\n * {@link module:engine/model/range~Range ranges} may contain only parts of text nodes. When {@link module:engine/model/range~Range#getItems\n * getting items}\n * contained in such range, we need to represent a part of that text node, since returning the whole text node would be incorrect.\n * `TextProxy` solves this issue.\n *\n * `TextProxy` has an API similar to {@link module:engine/model/text~Text Text} and allows to do most of the common tasks performed\n * on model nodes.\n *\n * **Note:** Some `TextProxy` instances may represent whole text node, not just a part of it.\n * See {@link module:engine/model/textproxy~TextProxy#isPartial}.\n *\n * **Note:** `TextProxy` is not an instance of {@link module:engine/model/node~Node node}. Keep this in mind when using it as a\n * parameter of methods.\n *\n * **Note:** `TextProxy` is a readonly interface. If you want to perform changes on model data represented by a `TextProxy`\n * use {@link module:engine/model/writer~Writer model writer API}.\n *\n * **Note:** `TextProxy` instances are created on the fly, basing on the current state of model. Because of this, it is\n * highly unrecommended to store references to `TextProxy` instances. `TextProxy` instances are not refreshed when\n * model changes, so they might get invalidated. Instead, consider creating {@link module:engine/model/liveposition~LivePosition live\n * position}.\n *\n * `TextProxy` instances are created by {@link module:engine/model/treewalker~TreeWalker model tree walker}. You should not need to create\n * an instance of this class by your own.\n */\nexport default class TextProxy {\n\t/**\n\t * Creates a text proxy.\n\t *\n\t * @protected\n\t * @param {module:engine/model/text~Text} textNode Text node which part is represented by this text proxy.\n\t * @param {Number} offsetInText Offset in {@link module:engine/model/textproxy~TextProxy#textNode text node} from which the text proxy\n\t * starts.\n\t * @param {Number} length Text proxy length, that is how many text node's characters, starting from `offsetInText` it represents.\n\t * @constructor\n\t */\n\tconstructor( textNode, offsetInText, length ) {\n\t\t/**\n\t\t * Text node which part is represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/text~Text}\n\t\t */\n\t\tthis.textNode = textNode;\n\n\t\tif ( offsetInText < 0 || offsetInText > textNode.offsetSize ) {\n\t\t\t/**\n\t\t\t * Given `offsetInText` value is incorrect.\n\t\t\t *\n\t\t\t * @error model-textproxy-wrong-offsetintext\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.', this );\n\t\t}\n\n\t\tif ( length < 0 || offsetInText + length > textNode.offsetSize ) {\n\t\t\t/**\n\t\t\t * Given `length` value is incorrect.\n\t\t\t *\n\t\t\t * @error model-textproxy-wrong-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-textproxy-wrong-length: Given length value is incorrect.', this );\n\t\t}\n\n\t\t/**\n\t\t * Text data represented by this text proxy.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.data = textNode.data.substring( offsetInText, offsetInText + length );\n\n\t\t/**\n\t\t * Offset in {@link module:engine/model/textproxy~TextProxy#textNode text node} from which the text proxy starts.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.offsetInText = offsetInText;\n\t}\n\n\t/**\n\t * Offset at which this text proxy starts in it's parent.\n\t *\n\t * @see module:engine/model/node~Node#startOffset\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget startOffset() {\n\t\treturn this.textNode.startOffset !== null ? this.textNode.startOffset + this.offsetInText : null;\n\t}\n\n\t/**\n\t * Offset size of this text proxy. Equal to the number of characters represented by the text proxy.\n\t *\n\t * @see module:engine/model/node~Node#offsetSize\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * Offset at which this text proxy ends in it's parent.\n\t *\n\t * @see module:engine/model/node~Node#endOffset\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget endOffset() {\n\t\treturn this.startOffset !== null ? this.startOffset + this.offsetSize : null;\n\t}\n\n\t/**\n\t * Flag indicating whether `TextProxy` instance covers only part of the original {@link module:engine/model/text~Text text node}\n\t * (`true`) or the whole text node (`false`).\n\t *\n\t * This is `false` when text proxy starts at the very beginning of {@link module:engine/model/textproxy~TextProxy#textNode textNode}\n\t * ({@link module:engine/model/textproxy~TextProxy#offsetInText offsetInText} equals `0`) and text proxy sizes is equal to\n\t * text node size.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isPartial() {\n\t\treturn this.offsetSize !== this.textNode.offsetSize;\n\t}\n\n\t/**\n\t * Parent of this text proxy, which is same as parent of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tget parent() {\n\t\treturn this.textNode.parent;\n\t}\n\n\t/**\n\t * Root of this text proxy, which is same as root of text node represented by this text proxy.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.textNode.root;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns text node represented by this text proxy or `null` if the text node\n\t * has no parent or is inside a {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this.textNode.document;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\ttextProxy.is( 'textProxy' ); // -> true\n\t *\t\ttextProxy.is( 'model:textProxy' ); // -> true\n\t *\n\t *\t\ttextProxy.is( 'view:textProxy' ); // -> false\n\t *\t\ttextProxy.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'textProxy' || type == 'model:textProxy';\n\t}\n\n\t/**\n\t * Gets path to this text proxy.\n\t *\n\t * @see module:engine/model/node~Node#getPath\n\t * @returns {Array.<Number>}\n\t */\n\tgetPath() {\n\t\tconst path = this.textNode.getPath();\n\n\t\tif ( path.length > 0 ) {\n\t\t\tpath[ path.length - 1 ] += this.offsetInText;\n\t\t}\n\n\t\treturn path;\n\t}\n\n\t/**\n\t * Returns ancestors array of this text proxy.\n\t *\n\t * @param {Object} options Options object.\n\t * @param {Boolean} [options.includeSelf=false] When set to `true` this text proxy will be also included in parent's array.\n\t * @param {Boolean} [options.parentFirst=false] When set to `true`, array will be sorted from text proxy parent to root element,\n\t * otherwise root element will be the first item in the array.\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors( options = { includeSelf: false, parentFirst: false } ) {\n\t\tconst ancestors = [];\n\t\tlet parent = options.includeSelf ? this : this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tancestors[ options.parentFirst ? 'push' : 'unshift' ]( parent );\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn ancestors;\n\t}\n\n\t/**\n\t * Checks if this text proxy has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on text proxy, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this.textNode.hasAttribute( key );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on text proxy.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this.textNode.getAttribute( key );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attributes. Attributes are returned as arrays containing two\n\t * items. First one is attribute key and second is attribute value.\n\t *\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this.textNode.getAttributes();\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this node's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this.textNode.getAttributeKeys();\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `#${ this.data }`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelTextProxy: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelTextProxy: ${ this }, ` +\n\t// @if CK_DEBUG_ENGINE // \t\t`attrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/nodelist\n */\n\nimport Node from './node';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Provides an interface to operate on a list of {@link module:engine/model/node~Node nodes}. `NodeList` is used internally\n * in classes like {@link module:engine/model/element~Element Element}\n * or {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment}.\n */\nexport default class NodeList {\n\t/**\n\t * Creates an empty node list.\n\t *\n\t * @protected\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes contained in this node list.\n\t */\n\tconstructor( nodes ) {\n\t\t/**\n\t\t * Nodes contained in this node list.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<module:engine/model/node~Node>}\n\t\t */\n\t\tthis._nodes = [];\n\n\t\tif ( nodes ) {\n\t\t\tthis._insertNodes( 0, nodes );\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all nodes contained inside this node list.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._nodes[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Number of nodes contained inside this node list.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._nodes.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all nodes contained inside this node list.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._nodes.reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\t}\n\n\t/**\n\t * Gets the node at the given index. Returns `null` if incorrect index was passed.\n\t *\n\t * @param {Number} index Index of node.\n\t * @returns {module:engine/model/node~Node|null} Node at given index.\n\t */\n\tgetNode( index ) {\n\t\treturn this._nodes[ index ] || null;\n\t}\n\n\t/**\n\t * Returns an index of the given node. Returns `null` if given node is not inside this node list.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's index.\n\t */\n\tgetNodeIndex( node ) {\n\t\tconst index = this._nodes.indexOf( node );\n\n\t\treturn index == -1 ? null : index;\n\t}\n\n\t/**\n\t * Returns the starting offset of given node. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all nodes that are before this node in this node list.\n\t *\n\t * @param {module:engine/model/node~Node} node Node to look for.\n\t * @returns {Number|null} Node's starting offset.\n\t */\n\tgetNodeStartOffset( node ) {\n\t\tconst index = this.getNodeIndex( node );\n\n\t\treturn index === null ? null : this._nodes.slice( 0, index ).reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\t}\n\n\t/**\n\t * Converts index to offset in node list.\n\t *\n\t * Returns starting offset of a node that is at given index. Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError}\n\t * `model-nodelist-index-out-of-bounds` if given index is less than `0` or more than {@link #length}.\n\t *\n\t * @param {Number} index Node's index.\n\t * @returns {Number} Node's starting offset.\n\t */\n\tindexToOffset( index ) {\n\t\tif ( index == this._nodes.length ) {\n\t\t\treturn this.maxOffset;\n\t\t}\n\n\t\tconst node = this._nodes[ index ];\n\n\t\tif ( !node ) {\n\t\t\t/**\n\t\t\t * Given index cannot be found in the node list.\n\t\t\t *\n\t\t\t * @error nodelist-index-out-of-bounds\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-nodelist-index-out-of-bounds: Given index cannot be found in the node list.', this );\n\t\t}\n\n\t\treturn this.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Converts offset in node list to index.\n\t *\n\t * Returns index of a node that occupies given offset. Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError}\n\t * `model-nodelist-offset-out-of-bounds` if given offset is less than `0` or more than {@link #maxOffset}.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number} Index of a node that occupies given offset.\n\t */\n\toffsetToIndex( offset ) {\n\t\tlet totalOffset = 0;\n\n\t\tfor ( const node of this._nodes ) {\n\t\t\tif ( offset >= totalOffset && offset < totalOffset + node.offsetSize ) {\n\t\t\t\treturn this.getNodeIndex( node );\n\t\t\t}\n\n\t\t\ttotalOffset += node.offsetSize;\n\t\t}\n\n\t\tif ( totalOffset != offset ) {\n\t\t\t/**\n\t\t\t * Given offset cannot be found in the node list.\n\t\t\t *\n\t\t\t * @error model-nodelist-offset-out-of-bounds\n\t\t\t * @param {Number} offset\n\t\t\t * @param {module:engine/model/nodelist~NodeList} nodeList Stringified node list.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-nodelist-offset-out-of-bounds: Given offset cannot be found in the node list.',\n\t\t\t\tthis,\n\t\t\t\t{\n\t\t\t\t\toffset,\n\t\t\t\t\tnodeList: this\n\t\t\t\t}\n\t\t\t);\n\t\t}\n\n\t\treturn this.length;\n\t}\n\n\t/**\n\t * Inserts given nodes at given index.\n\t *\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes to be inserted.\n\t */\n\t_insertNodes( index, nodes ) {\n\t\t// Validation.\n\t\tfor ( const node of nodes ) {\n\t\t\tif ( !( node instanceof Node ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to insert an object which is not a Node instance.\n\t\t\t\t *\n\t\t\t\t * @error nodelist-insertNodes-not-node\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tthis._nodes.splice( index, 0, ...nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index.\n\t *\n\t * @protected\n\t * @param {Number} indexStart Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeNodes( indexStart, howMany = 1 ) {\n\t\treturn this._nodes.splice( indexStart, howMany );\n\t}\n\n\t/**\n\t * Converts `NodeList` instance to an array containing nodes that were inserted in the node list. Nodes\n\t * are also converted to their plain object representation.\n\t *\n\t * @returns {Array.<module:engine/model/node~Node>} `NodeList` instance converted to `Array`.\n\t */\n\ttoJSON() {\n\t\treturn this._nodes.map( node => node.toJSON() );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/element\n */\n\nimport Node from './node';\nimport NodeList from './nodelist';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n// @if CK_DEBUG_ENGINE // const { stringifyMap, convertMapToStringifiedObject, convertMapToTags } = require( '../dev-utils/utils' );\n\n/**\n * Model element. Type of {@link module:engine/model/node~Node node} that has a {@link module:engine/model/element~Element#name name} and\n * {@link module:engine/model/element~Element#getChildren child nodes}.\n *\n * **Important**: see {@link module:engine/model/node~Node} to read about restrictions using `Element` and `Node` API.\n *\n * @extends module:engine/model/node~Node\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a model element.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createElement} method instead.\n\t *\n\t * @protected\n\t * @param {String} name Element's name.\n\t * @param {Object} [attrs] Element's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t * @param {module:engine/model/node~Node|Iterable.<module:engine/model/node~Node>} [children]\n\t * One or more nodes to be inserted as children of created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Element name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:engine/model/element~Element#name\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * List of children nodes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/element~Element#_children\n\t\t */\n\t\tthis._children = new NodeList();\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Number of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._children.maxOffset;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\telement.is( 'element' ); // -> true\n\t *\t\telement.is( 'node' ); // -> true\n\t *\t\telement.is( 'model:element' ); // -> true\n\t *\t\telement.is( 'model:node' ); // -> true\n\t *\n\t *\t\telement.is( 'view:element' ); // -> false\n\t *\t\telement.is( 'documentSelection' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/model/element~Element#name name}:\n\t *\n\t *\t\telement.is( 'image' ); // -> true if this is an <image> element\n\t *\t\telement.is( 'element', 'image' ); // -> same as above\n\t *\t\ttext.is( 'image' ); -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tconst cutType = type.replace( /^model:/, '' );\n\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'element' || cutType == this.name || super.is( type );\n\t\t} else {\n\t\t\treturn cutType == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/model/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children.getNode( index );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all of this element's children.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an index of the given child node. Returns `null` if given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's index in this element.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.getNodeIndex( node );\n\t}\n\n\t/**\n\t * Returns the starting offset of given child. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all node's siblings that are before it. Returns `null` if\n\t * given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's starting offset.\n\t */\n\tgetChildStartOffset( node ) {\n\t\treturn this._children.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Returns index of a node that occupies given offset. If given offset is too low, returns `0`. If given offset is\n\t * too high, returns {@link module:engine/model/element~Element#getChildIndex index after last child}.\n\t *\n\t *\t\tconst textNode = new Text( 'foo' );\n\t *\t\tconst pElement = new Element( 'p' );\n\t *\t\tconst divElement = new Element( [ textNode, pElement ] );\n\t *\t\tdivElement.offsetToIndex( -1 ); // Returns 0, because offset is too low.\n\t *\t\tdivElement.offsetToIndex( 0 ); // Returns 0, because offset 0 is taken by `textNode` which is at index 0.\n\t *\t\tdivElement.offsetToIndex( 1 ); // Returns 0, because `textNode` has `offsetSize` equal to 3, so it occupies offset 1 too.\n\t *\t\tdivElement.offsetToIndex( 2 ); // Returns 0.\n\t *\t\tdivElement.offsetToIndex( 3 ); // Returns 1.\n\t *\t\tdivElement.offsetToIndex( 4 ); // Returns 2. There are no nodes at offset 4, so last available index is returned.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number}\n\t */\n\toffsetToIndex( offset ) {\n\t\treturn this._children.offsetToIndex( offset );\n\t}\n\n\t/**\n\t * Returns a descendant node by its path relative to this element.\n\t *\n\t *\t\t// <this>a<b>c</b></this>\n\t *\t\tthis.getNodeByPath( [ 0 ] ); // -> \"a\"\n\t *\t\tthis.getNodeByPath( [ 1 ] ); // -> <b>\n\t *\t\tthis.getNodeByPath( [ 1, 0 ] ); // -> \"c\"\n\t *\n\t * @param {Array.<Number>} relativePath Path of the node to find, relative to this element.\n\t * @returns {module:engine/model/node~Node}\n\t */\n\tgetNodeByPath( relativePath ) {\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\tfor ( const index of relativePath ) {\n\t\t\tnode = node.getChild( node.offsetToIndex( index ) );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Converts `Element` instance to plain object and returns it. Takes care of converting all of this element's children.\n\t *\n\t * @returns {Object} `Element` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.name = this.name;\n\n\t\tif ( this._children.length > 0 ) {\n\t\t\tjson.children = [];\n\n\t\t\tfor ( const node of this._children ) {\n\t\t\t\tjson.children.push( node.toJSON() );\n\t\t\t}\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a copy of this element and returns it. Created element has the same name and attributes as the original element.\n\t * If clone is deep, the original element's children are also cloned. If not, then empty element is removed.\n\t *\n\t * @protected\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any child.\n\t */\n\t_clone( deep = false ) {\n\t\tconst children = deep ? Array.from( this._children ).map( node => node._clone( true ) ) : null;\n\n\t\treturn new Element( this.name, this.getAttributes(), children );\n\t}\n\n\t/**\n\t * {@link module:engine/model/element~Element#_insertChild Inserts} one or more nodes at the end of this element.\n\t *\n\t * @see module:engine/model/writer~Writer#append\n\t * @protected\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} nodes Nodes to be inserted.\n\t */\n\t_appendChild( nodes ) {\n\t\tthis._insertChild( this.childCount, nodes );\n\t}\n\n\t/**\n\t * Inserts one or more nodes at the given index and sets {@link module:engine/model/node~Node#parent parent} of these nodes\n\t * to this element.\n\t *\n\t * @see module:engine/model/writer~Writer#insert\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_insertChild( index, items ) {\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\t\t}\n\n\t\tthis._children._insertNodes( index, nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index and sets\n\t * {@link module:engine/model/node~Node#parent parent} of these nodes to `null`.\n\t *\n\t * @see module:engine/model/writer~Writer#remove\n\t * @protected\n\t * @param {Number} index Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tconst nodes = this._children._removeNodes( index, howMany );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tnode.parent = null;\n\t\t}\n\n\t\treturn nodes;\n\t}\n\n\t/**\n\t * Creates an `Element` instance from given plain object (i.e. parsed JSON string).\n\t * Converts `Element` children to proper nodes.\n\t *\n\t * @param {Object} json Plain object to be converted to `Element`.\n\t * @returns {module:engine/model/element~Element} `Element` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\tlet children = null;\n\n\t\tif ( json.children ) {\n\t\t\tchildren = [];\n\n\t\t\tfor ( const child of json.children ) {\n\t\t\t\tif ( child.name ) {\n\t\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn new Element( json.name, json.attributes, children );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `<${ this.rootName || this.name }>`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelElement: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logExtended() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( `ModelElement: ${ this }, ${ this.childCount } children,\n\t// @if CK_DEBUG_ENGINE //\t\tattrs: ${ convertMapToStringifiedObject( this.getAttributes() ) }` );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logAll() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( '--------------------' );\n\t// @if CK_DEBUG_ENGINE //\n\t// @if CK_DEBUG_ENGINE // \tthis.logExtended();\n\t// @if CK_DEBUG_ENGINE //\tconsole.log( 'List of children:' );\n\t// @if CK_DEBUG_ENGINE //\n\t// @if CK_DEBUG_ENGINE // \tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE // \t\tchild.log();\n\t// @if CK_DEBUG_ENGINE // \t}\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // printTree( level = 0) {\n\t// @if CK_DEBUG_ENGINE // \tlet string = '';\n\n\t// @if CK_DEBUG_ENGINE // \tstring += '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE // \tstring += `<${ this.rootName || this.name }${ convertMapToTags( this.getAttributes() ) }>`;\n\n\t// @if CK_DEBUG_ENGINE // \tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE // \t\tstring += '\\n';\n\n\t// @if CK_DEBUG_ENGINE // \t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE // \t\t\tconst textAttrs = convertMapToTags( child._attrs );\n\n\t// @if CK_DEBUG_ENGINE // \t\t\tstring += '\\t'.repeat( level + 1 );\n\n\t// @if CK_DEBUG_ENGINE // \t\t\tif ( textAttrs !== '' ) {\n\t// @if CK_DEBUG_ENGINE // \t\t\t\tstring += `<$text${ textAttrs }>` + child.data + '</$text>';\n\t// @if CK_DEBUG_ENGINE // \t\t\t} else {\n\t// @if CK_DEBUG_ENGINE // \t\t\t\tstring += child.data;\n\t// @if CK_DEBUG_ENGINE // \t\t\t}\n\t// @if CK_DEBUG_ENGINE // \t\t} else {\n\t// @if CK_DEBUG_ENGINE // \t\t\tstring += child.printTree( level + 1 );\n\t// @if CK_DEBUG_ENGINE // \t\t}\n\t// @if CK_DEBUG_ENGINE // \t}\n\n\t// @if CK_DEBUG_ENGINE // \tif ( this.childCount ) {\n\t// @if CK_DEBUG_ENGINE // \t\tstring += '\\n' + '\\t'.repeat( level );\n\t// @if CK_DEBUG_ENGINE // \t}\n\n\t// @if CK_DEBUG_ENGINE // \tstring += `</${ this.rootName || this.name }>`;\n\n\t// @if CK_DEBUG_ENGINE // \treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/model/item~Item|Iterable.<String|module:engine/model/item~Item>}\n// @returns {Iterable.<module:engine/model/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data, node.getAttributes() );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/treewalker\n */\n\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport Element from './element';\nimport Position from './position';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Position iterator class. It allows to iterate forward and backward over the document.\n */\nexport default class TreeWalker {\n\t/**\n\t * Creates a range iterator. All parameters are optional, but you have to specify either `boundaries` or `startPosition`.\n\t *\n\t * @constructor\n\t * @param {Object} [options={}] Object with configuration.\n\t * @param {'forward'|'backward'} [options.direction='forward'] Walking direction.\n\t * @param {module:engine/model/range~Range} [options.boundaries=null] Range to define boundaries of the iterator.\n\t * @param {module:engine/model/position~Position} [options.startPosition] Starting position.\n\t * @param {Boolean} [options.singleCharacters=false] Flag indicating whether all consecutive characters with the same attributes\n\t * should be returned one by one as multiple {@link module:engine/model/textproxy~TextProxy} (`true`) objects or as one\n\t * {@link module:engine/model/textproxy~TextProxy} (`false`).\n\t * @param {Boolean} [options.shallow=false] Flag indicating whether iterator should enter elements or not. If the\n\t * iterator is shallow child nodes of any iterated node will not be returned along with `elementEnd` tag.\n\t * @param {Boolean} [options.ignoreElementEnd=false] Flag indicating whether iterator should ignore `elementEnd`\n\t * tags. If the option is true walker will not return a parent node of start position. If this option is `true`\n\t * each {@link module:engine/model/element~Element} will be returned once, while if the option is `false` they might be returned\n\t * twice: for `'elementStart'` and `'elementEnd'`.\n\t */\n\tconstructor( options = {} ) {\n\t\tif ( !options.boundaries && !options.startPosition ) {\n\t\t\t/**\n\t\t\t * Neither boundaries nor starting position of a `TreeWalker` have been defined.\n\t\t\t *\n\t\t\t * @error model-tree-walker-no-start-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.',\n\t\t\t\tnull\n\t\t\t);\n\t\t}\n\n\t\tconst direction = options.direction || 'forward';\n\n\t\tif ( direction != 'forward' && direction != 'backward' ) {\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.',\n\t\t\t\toptions,\n\t\t\t\t{ direction }\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Walking direction. Defaults `'forward'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'backward'|'forward'} module:engine/model/treewalker~TreeWalker#direction\n\t\t */\n\t\tthis.direction = direction;\n\n\t\t/**\n\t\t * Iterator boundaries.\n\t\t *\n\t\t * When the iterator is walking `'forward'` on the end of boundary or is walking `'backward'`\n\t\t * on the start of boundary, then `{ done: true }` is returned.\n\t\t *\n\t\t * If boundaries are not defined they are set before first and after last child of the root node.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range} module:engine/model/treewalker~TreeWalker#boundaries\n\t\t */\n\t\tthis.boundaries = options.boundaries || null;\n\n\t\t/**\n\t\t * Iterator position. This is always static position, even if the initial position was a\n\t\t * {@link module:engine/model/liveposition~LivePosition live position}. If start position is not defined then position depends\n\t\t * on {@link #direction}. If direction is `'forward'` position starts form the beginning, when direction\n\t\t * is `'backward'` position starts from the end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position} module:engine/model/treewalker~TreeWalker#position\n\t\t */\n\t\tif ( options.startPosition ) {\n\t\t\tthis.position = options.startPosition.clone();\n\t\t} else {\n\t\t\tthis.position = Position._createAt( this.boundaries[ this.direction == 'backward' ? 'end' : 'start' ] );\n\t\t}\n\n\t\t// Reset position stickiness in case it was set to other value, as the stickiness is kept after cloning.\n\t\tthis.position.stickiness = 'toNone';\n\n\t\t/**\n\t\t * Flag indicating whether all consecutive characters with the same attributes should be\n\t\t * returned as one {@link module:engine/model/textproxy~TextProxy} (`true`) or one by one (`false`).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#singleCharacters\n\t\t */\n\t\tthis.singleCharacters = !!options.singleCharacters;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should enter elements or not. If the iterator is shallow child nodes of any\n\t\t * iterated node will not be returned along with `elementEnd` tag.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#shallow\n\t\t */\n\t\tthis.shallow = !!options.shallow;\n\n\t\t/**\n\t\t * Flag indicating whether iterator should ignore `elementEnd` tags. If the option is true walker will not\n\t\t * return a parent node of the start position. If this option is `true` each {@link module:engine/model/element~Element} will\n\t\t * be returned once, while if the option is `false` they might be returned twice:\n\t\t * for `'elementStart'` and `'elementEnd'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} module:engine/model/treewalker~TreeWalker#ignoreElementEnd\n\t\t */\n\t\tthis.ignoreElementEnd = !!options.ignoreElementEnd;\n\n\t\t/**\n\t\t * Start boundary cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element} module:engine/model/treewalker~TreeWalker#_boundaryStartParent\n\t\t */\n\t\tthis._boundaryStartParent = this.boundaries ? this.boundaries.start.parent : null;\n\n\t\t/**\n\t\t * End boundary cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element} module:engine/model/treewalker~TreeWalker#_boundaryEndParent\n\t\t */\n\t\tthis._boundaryEndParent = this.boundaries ? this.boundaries.end.parent : null;\n\n\t\t/**\n\t\t * Parent of the most recently visited node. Cached for optimization purposes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t\t * module:engine/model/treewalker~TreeWalker#_visitedParent\n\t\t */\n\t\tthis._visitedParent = this.position.parent;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:engine/model/treewalker~TreeWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves {@link #position} in the {@link #direction} skipping values as long as the callback function returns `true`.\n\t *\n\t * For example:\n\t *\n\t * \t\twalker.skip( value => value.type == 'text' ); // <paragraph>[]foo</paragraph> -> <paragraph>foo[]</paragraph>\n\t * \t\twalker.skip( () => true ); // Move the position to the end: <paragraph>[]foo</paragraph> -> <paragraph>foo</paragraph>[]\n\t * \t\twalker.skip( () => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/model/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t */\n\tskip( skip ) {\n\t\tlet done, value, prevPosition, prevVisitedParent;\n\n\t\tdo {\n\t\t\tprevPosition = this.position;\n\t\t\tprevVisitedParent = this._visitedParent;\n\n\t\t\t( { done, value } = this.next() );\n\t\t} while ( !done && skip( value ) );\n\n\t\tif ( !done ) {\n\t\t\tthis.position = prevPosition;\n\t\t\tthis._visitedParent = prevVisitedParent;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the next tree walker's value.\n\t *\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} Next tree walker's value.\n\t */\n\tnext() {\n\t\tif ( this.direction == 'forward' ) {\n\t\t\treturn this._next();\n\t\t} else {\n\t\t\treturn this._previous();\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step forward in model. Moves the {@link #position} to the next position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_next() {\n\t\tconst previousPosition = this.position;\n\t\tconst position = this.position.clone();\n\t\tconst parent = this._visitedParent;\n\n\t\t// We are at the end of the root.\n\t\tif ( parent.parent === null && position.offset === parent.maxOffset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent === this._boundaryEndParent && position.offset == this.boundaries.end.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\tconst node = position.textNode ? position.textNode : position.nodeAfter;\n\n\t\tif ( node instanceof Element ) {\n\t\t\tif ( !this.shallow ) {\n\t\t\t\t// Manual operations on path internals for optimization purposes. Here and in the rest of the method.\n\t\t\t\tposition.path.push( 0 );\n\t\t\t\tthis._visitedParent = node;\n\t\t\t} else {\n\t\t\t\tposition.offset++;\n\t\t\t}\n\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t} else if ( node instanceof Text ) {\n\t\t\tlet charactersCount;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tcharactersCount = 1;\n\t\t\t} else {\n\t\t\t\tlet offset = node.endOffset;\n\n\t\t\t\tif ( this._boundaryEndParent == parent && this.boundaries.end.offset < offset ) {\n\t\t\t\t\toffset = this.boundaries.end.offset;\n\t\t\t\t}\n\n\t\t\t\tcharactersCount = offset - position.offset;\n\t\t\t}\n\n\t\t\tconst offsetInTextNode = position.offset - node.startOffset;\n\t\t\tconst item = new TextProxy( node, offsetInTextNode, charactersCount );\n\n\t\t\tposition.offset += charactersCount;\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the end of current `parent`.\n\t\t\tposition.path.pop();\n\t\t\tposition.offset++;\n\t\t\tthis.position = position;\n\t\t\tthis._visitedParent = parent.parent;\n\n\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\treturn this._next();\n\t\t\t} else {\n\t\t\t\treturn formatReturnValue( 'elementEnd', parent, previousPosition, position );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Makes a step backward in model. Moves the {@link #position} to the previous position and returns the encountered value.\n\t *\n\t * @private\n\t * @returns {Object}\n\t * @returns {Boolean} return.done True if iterator is done.\n\t * @returns {module:engine/model/treewalker~TreeWalkerValue} return.value Information about taken step.\n\t */\n\t_previous() {\n\t\tconst previousPosition = this.position;\n\t\tconst position = this.position.clone();\n\t\tconst parent = this._visitedParent;\n\n\t\t// We are at the beginning of the root.\n\t\tif ( parent.parent === null && position.offset === 0 ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// We reached the walker boundary.\n\t\tif ( parent == this._boundaryStartParent && position.offset == this.boundaries.start.offset ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\t// Get node just before current position\n\t\tconst node = position.textNode ? position.textNode : position.nodeBefore;\n\n\t\tif ( node instanceof Element ) {\n\t\t\tposition.offset--;\n\n\t\t\tif ( !this.shallow ) {\n\t\t\t\tposition.path.push( node.maxOffset );\n\t\t\t\tthis.position = position;\n\t\t\t\tthis._visitedParent = node;\n\n\t\t\t\tif ( this.ignoreElementEnd ) {\n\t\t\t\t\treturn this._previous();\n\t\t\t\t} else {\n\t\t\t\t\treturn formatReturnValue( 'elementEnd', node, previousPosition, position );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tthis.position = position;\n\n\t\t\t\treturn formatReturnValue( 'elementStart', node, previousPosition, position, 1 );\n\t\t\t}\n\t\t} else if ( node instanceof Text ) {\n\t\t\tlet charactersCount;\n\n\t\t\tif ( this.singleCharacters ) {\n\t\t\t\tcharactersCount = 1;\n\t\t\t} else {\n\t\t\t\tlet offset = node.startOffset;\n\n\t\t\t\tif ( this._boundaryStartParent == parent && this.boundaries.start.offset > offset ) {\n\t\t\t\t\toffset = this.boundaries.start.offset;\n\t\t\t\t}\n\n\t\t\t\tcharactersCount = position.offset - offset;\n\t\t\t}\n\n\t\t\tconst offsetInTextNode = position.offset - node.startOffset;\n\t\t\tconst item = new TextProxy( node, offsetInTextNode - charactersCount, charactersCount );\n\n\t\t\tposition.offset -= charactersCount;\n\t\t\tthis.position = position;\n\n\t\t\treturn formatReturnValue( 'text', item, previousPosition, position, charactersCount );\n\t\t} else {\n\t\t\t// `node` is not set, we reached the beginning of current `parent`.\n\t\t\tposition.path.pop();\n\t\t\tthis.position = position;\n\t\t\tthis._visitedParent = parent.parent;\n\n\t\t\treturn formatReturnValue( 'elementStart', parent, previousPosition, position, 1 );\n\t\t}\n\t}\n}\n\nfunction formatReturnValue( type, item, previousPosition, nextPosition, length ) {\n\treturn {\n\t\tdone: false,\n\t\tvalue: {\n\t\t\ttype,\n\t\t\titem,\n\t\t\tpreviousPosition,\n\t\t\tnextPosition,\n\t\t\tlength\n\t\t}\n\t};\n}\n\n/**\n * Type of the step made by {@link module:engine/model/treewalker~TreeWalker}.\n * Possible values: `'elementStart'` if walker is at the beginning of a node, `'elementEnd'` if walker is at the end of node,\n * `'character'` if walker traversed over a character, or `'text'` if walker traversed over multiple characters (available in\n * character merging mode, see {@link module:engine/model/treewalker~TreeWalker#constructor}).\n *\n * @typedef {'elementStart'|'elementEnd'|'character'|'text'} module:engine/model/treewalker~TreeWalkerValueType\n */\n\n/**\n * Object returned by {@link module:engine/model/treewalker~TreeWalker} when traversing tree model.\n *\n * @typedef {Object} module:engine/model/treewalker~TreeWalkerValue\n * @property {module:engine/model/treewalker~TreeWalkerValueType} type\n * @property {module:engine/model/item~Item} item Item between old and new positions of {@link module:engine/model/treewalker~TreeWalker}.\n * @property {module:engine/model/position~Position} previousPosition Previous position of the iterator.\n * * Forward iteration: For `'elementEnd'` it is the last position inside the element. For all other types it is the\n * position before the item.\n * * Backward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after item.\n * @property {module:engine/model/position~Position} nextPosition Next position of the iterator.\n * * Forward iteration: For `'elementStart'` it is the first position inside the element. For all other types it is\n * the position after the item.\n * * Backward iteration: For `'elementEnd'` it is last position inside element. For all other types it is the position\n * before the item.\n * @property {Number} [length] Length of the item. For `'elementStart'` and `'character'` it is 1. For `'text'` it is\n * the length of the text. For `'elementEnd'` it is `undefined`.\n */\n\n/**\n * Tree walking directions.\n *\n * @typedef {'forward'|'backward'} module:engine/view/treewalker~TreeWalkerDirection\n */\n","/**\n * Gets the last element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {*} Returns the last element of `array`.\n * @example\n *\n * _.last([1, 2, 3]);\n * // => 3\n */\nfunction last(array) {\n var length = array == null ? 0 : array.length;\n return length ? array[length - 1] : undefined;\n}\n\nexport default last;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/position\n */\n\nimport TreeWalker from './treewalker';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Text from './text';\nimport { last } from 'lodash-es';\n\n// To check if component is loaded more than once.\nimport '@ckeditor/ckeditor5-utils/src/version';\n\n/**\n * Represents a position in the model tree.\n *\n * A position is represented by its {@link module:engine/model/position~Position#root} and\n * a {@link module:engine/model/position~Position#path} in that root.\n *\n * You can create position instances via its constructor or the `createPosition*()` factory methods of\n * {@link module:engine/model/model~Model} and {@link module:engine/model/writer~Writer}.\n *\n * **Note:** Position is based on offsets, not indexes. This means that a position between two text nodes\n * `foo` and `bar` has offset `3`, not `1`. See {@link module:engine/model/position~Position#path} for more information.\n *\n * Since a position in the model is represented by a {@link module:engine/model/position~Position#root position root} and\n * {@link module:engine/model/position~Position#path position path} it is possible to create positions placed in non-existing places.\n * This requirement is important for operational transformation algorithms.\n *\n * Also, {@link module:engine/model/operation/operation~Operation operations}\n * kept in the {@link module:engine/model/document~Document#history document history}\n * are storing positions (and ranges) which were correct when those operations were applied, but may not be correct\n * after the document has changed.\n *\n * When changes are applied to the model, it may also happen that {@link module:engine/model/position~Position#parent position parent}\n * will change even if position path has not changed. Keep in mind, that if a position leads to non-existing element,\n * {@link module:engine/model/position~Position#parent} and some other properties and methods will throw errors.\n *\n * In most cases, position with wrong path is caused by an error in code, but it is sometimes needed, as described above.\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t */\n\tconstructor( root, path, stickiness = 'toNone' ) {\n\t\tif ( !root.is( 'element' ) && !root.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * Position root is invalid.\n\t\t\t *\n\t\t\t * Positions can only be anchored in elements or document fragments.\n\t\t\t *\n\t\t\t * @error model-position-root-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-root-invalid: Position root invalid.',\n\t\t\t\troot\n\t\t\t);\n\t\t}\n\n\t\tif ( !( path instanceof Array ) || path.length === 0 ) {\n\t\t\t/**\n\t\t\t * Position path must be an array with at least one item.\n\t\t\t *\n\t\t\t * @error model-position-path-incorrect-format\n\t\t\t * @param path\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-path-incorrect-format: Position path must be an array with at least one item.',\n\t\t\t\troot,\n\t\t\t\t{ path }\n\t\t\t);\n\t\t}\n\n\t\t// Normalize the root and path (if element was passed).\n\t\tpath = root.getPath().concat( path );\n\t\troot = root.root;\n\n\t\t/**\n\t\t * Root of the position path.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t\t * module:engine/model/position~Position#root\n\t\t */\n\t\tthis.root = root;\n\n\t\t/**\n\t\t * Position of the node in the tree. **Path contains offsets, not indexes.**\n\t\t *\n\t\t * Position can be placed before, after or in a {@link module:engine/model/node~Node node} if that node has\n\t\t * {@link module:engine/model/node~Node#offsetSize} greater than `1`. Items in position path are\n\t\t * {@link module:engine/model/node~Node#startOffset starting offsets} of position ancestors, starting from direct root children,\n\t\t * down to the position offset in it's parent.\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P before: [ 0 ] after: [ 1 ]\n\t\t *\t\t |- UL before: [ 1 ] after: [ 2 ]\n\t\t *\t\t |- LI before: [ 1, 0 ] after: [ 1, 1 ]\n\t\t *\t\t | |- foo before: [ 1, 0, 0 ] after: [ 1, 0, 3 ]\n\t\t *\t\t |- LI before: [ 1, 1 ] after: [ 1, 2 ]\n\t\t *\t\t |- bar before: [ 1, 1, 0 ] after: [ 1, 1, 3 ]\n\t\t *\n\t\t * `foo` and `bar` are representing {@link module:engine/model/text~Text text nodes}. Since text nodes has offset size\n\t\t * greater than `1` you can place position offset between their start and end:\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P\n\t\t *\t\t |- UL\n\t\t *\t\t |- LI\n\t\t *\t\t | |- f^o|o ^ has path: [ 1, 0, 1 ] | has path: [ 1, 0, 2 ]\n\t\t *\t\t |- LI\n\t\t *\t\t |- b^a|r ^ has path: [ 1, 1, 1 ] | has path: [ 1, 1, 2 ]\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<Number>} module:engine/model/position~Position#path\n\t\t */\n\t\tthis.path = path;\n\n\t\t/**\n\t\t * Position stickiness. See {@link module:engine/model/position~PositionStickiness}.\n\t\t *\n\t\t * @member {module:engine/model/position~PositionStickiness} module:engine/model/position~Position#stickiness\n\t\t */\n\t\tthis.stickiness = stickiness;\n\t}\n\n\t/**\n\t * Offset at which this position is located in its {@link module:engine/model/position~Position#parent parent}. It is equal\n\t * to the last item in position {@link module:engine/model/position~Position#path path}.\n\t *\n\t * @type {Number}\n\t */\n\tget offset() {\n\t\treturn last( this.path );\n\t}\n\n\t/**\n\t * @param {Number} newOffset\n\t */\n\tset offset( newOffset ) {\n\t\tthis.path[ this.path.length - 1 ] = newOffset;\n\t}\n\n\t/**\n\t * Parent element of this position.\n\t *\n\t * Keep in mind that `parent` value is calculated when the property is accessed.\n\t * If {@link module:engine/model/position~Position#path position path}\n\t * leads to a non-existing element, `parent` property will throw error.\n\t *\n\t * Also it is a good idea to cache `parent` property if it is used frequently in an algorithm (i.e. in a long loop).\n\t *\n\t * @readonly\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget parent() {\n\t\tlet parent = this.root;\n\n\t\tfor ( let i = 0; i < this.path.length - 1; i++ ) {\n\t\t\tparent = parent.getChild( parent.offsetToIndex( this.path[ i ] ) );\n\n\t\t\tif ( !parent ) {\n\t\t\t\tthrow new CKEditorError( 'model-position-path-incorrect: The position\\'s path is incorrect.', this, { position: this } );\n\t\t\t}\n\t\t}\n\n\t\tif ( parent.is( 'text' ) ) {\n\t\t\t/**\n\t\t\t * The position's path is incorrect. This means that a position does not point to\n\t\t\t * a correct place in the tree and hence, some of its methods and getters cannot work correctly.\n\t\t\t *\n\t\t\t * **Note**: Unlike DOM and view positions, in the model, the\n\t\t\t * {@link module:engine/model/position~Position#parent position's parent} is always an element or a document fragment.\n\t\t\t * The last offset in the {@link module:engine/model/position~Position#path position's path} is the point in this element where\n\t\t\t * this position points.\n\t\t\t *\n\t\t\t * Read more about model positions and offsets in\n\t\t\t * the {@glink framework/guides/architecture/editing-engine#indexes-and-offsets Editing engine architecture guide}.\n\t\t\t *\n\t\t\t * @error position-incorrect-path\n\t\t\t * @param {module:engine/model/position~Position} position The incorrect position.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-path-incorrect: The position\\'s path is incorrect.', this, { position: this } );\n\t\t}\n\n\t\treturn parent;\n\t}\n\n\t/**\n\t * Position {@link module:engine/model/position~Position#offset offset} converted to an index in position's parent node. It is\n\t * equal to the {@link module:engine/model/node~Node#index index} of a node after this position. If position is placed\n\t * in text node, position index is equal to the index of that text node.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget index() {\n\t\treturn this.parent.offsetToIndex( this.offset );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/model/text~Text text node} instance in which this position is placed or `null` if this\n\t * position is not in a text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/text~Text|null}\n\t */\n\tget textNode() {\n\t\tconst node = this.parent.getChild( this.index );\n\n\t\treturn ( node instanceof Text && node.startOffset < this.offset ) ? node : null;\n\t}\n\n\t/**\n\t * Node directly after this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index ) : null;\n\t}\n\n\t/**\n\t * Node directly before this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {Node}\n\t */\n\tget nodeBefore() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index - 1 ) : null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\treturn this.offset == this.parent.maxOffset;\n\t}\n\n\t/**\n\t * Checks whether this position is before or after given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/model/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.root != otherPosition.root ) {\n\t\t\treturn 'different';\n\t\t}\n\n\t\tconst result = compareArrays( this.path, otherPosition.path );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'same':\n\t\t\t\treturn 'same';\n\n\t\t\tcase 'prefix':\n\t\t\t\treturn 'before';\n\n\t\t\tcase 'extension':\n\t\t\t\treturn 'after';\n\n\t\t\tdefault:\n\t\t\t\treturn this.path[ result ] < otherPosition.path[ result ] ? 'before' : 'after';\n\t\t}\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/model/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' );\n\t * \t\t// <paragraph>[]foo</paragraph> -> <paragraph>foo[]</paragraph>\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } );\n\t * \t\t// <paragraph>foo[]</paragraph> -> <paragraph>[]foo</paragraph>\n\t *\n\t * \t\tgetLastMatchingPosition( value => false );\n\t * \t\t// Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/model/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/model/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns a path to this position's parent. Parent path is equal to position {@link module:engine/model/position~Position#path path}\n\t * but without the last item.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @returns {Array.<Number>} Path to the parent.\n\t */\n\tgetParentPath() {\n\t\treturn this.path.slice( 0, -1 );\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and its ancestors.\n\t *\n\t * @returns {Array.<module:engine/model/item~Item>} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the slice of two position {@link #path paths} which is identical. The {@link #root roots}\n\t * of these two paths must be identical.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {Array.<Number>} The common path.\n\t */\n\tgetCommonPath( position ) {\n\t\tif ( this.root != position.root ) {\n\t\t\treturn [];\n\t\t}\n\n\t\t// We find on which tree-level start and end have the lowest common ancestor\n\t\tconst cmp = compareArrays( this.path, position.path );\n\t\t// If comparison returned string it means that arrays are same.\n\t\tconst diffAt = ( typeof cmp == 'string' ) ? Math.min( this.path.length, position.path.length ) : cmp;\n\n\t\treturn this.path.slice( 0, diffAt );\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions. The {@link #root roots} of these two positions must be identical.\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns a new instance of `Position`, that has same {@link #parent parent} but it's offset\n\t * is shifted by `shift` value (can be a negative value).\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {Number} shift Offset shift. Can be a negative value.\n\t * @returns {module:engine/model/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = this.clone();\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Checks whether this position is after given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @see module:engine/model/position~Position#isBefore\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before given position.\n\t *\n\t * **Note:** watch out when using negation of the value returned by this method, because the negation will also\n\t * be `true` if positions are in different roots and you might not expect this. You should probably use\n\t * `a.isAfter( b ) || a.isEqual( b )` or `!a.isBefore( p ) && a.root == b.root` in most scenarios. If your\n\t * condition uses multiple `isAfter` and `isBefore` checks, build them so they do not use negated values, i.e.:\n\t *\n\t *\t\tif ( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do A.\n\t *\t\t} else {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * or, if you have only one if-branch:\n\t *\n\t *\t\tif ( !( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * rather than:\n\t *\n\t *\t\tif ( !a.isBefore( b ) || && !c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t} else {\n\t *\t\t\t// do A.\n\t *\t\t}\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is equal to given position.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'same';\n\t}\n\n\t/**\n\t * Checks whether this position is touching given position. Positions touch when there are no text nodes\n\t * or empty nodes in a range between them. Technically, those positions are not equal but in many cases\n\t * they are very similar or even indistinguishable.\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions touch.\n\t */\n\tisTouching( otherPosition ) {\n\t\tlet left = null;\n\t\tlet right = null;\n\t\tconst compare = this.compareWith( otherPosition );\n\n\t\tswitch ( compare ) {\n\t\t\tcase 'same':\n\t\t\t\treturn true;\n\n\t\t\tcase 'before':\n\t\t\t\tleft = Position._createAt( this );\n\t\t\t\tright = Position._createAt( otherPosition );\n\t\t\t\tbreak;\n\n\t\t\tcase 'after':\n\t\t\t\tleft = Position._createAt( otherPosition );\n\t\t\t\tright = Position._createAt( this );\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\treturn false;\n\t\t}\n\n\t\t// Cached for optimization purposes.\n\t\tlet leftParent = left.parent;\n\n\t\twhile ( left.path.length + right.path.length ) {\n\t\t\tif ( left.isEqual( right ) ) {\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\tif ( left.path.length > right.path.length ) {\n\t\t\t\tif ( left.offset !== leftParent.maxOffset ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tleft.path = left.path.slice( 0, -1 );\n\t\t\t\tleftParent = leftParent.parent;\n\t\t\t\tleft.offset++;\n\t\t\t} else {\n\t\t\t\tif ( right.offset !== 0 ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tright.path = right.path.slice( 0, -1 );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tposition.is( 'position' ); // -> true\n\t *\t\tposition.is( 'model:position' ); // -> true\n\t *\n\t *\t\tposition.is( 'view:position' ); // -> false\n\t *\t\tposition.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'position' || type == 'model:position';\n\t}\n\n\t/**\n\t * Checks if two positions are in the same parent.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/position~Position} position Position to compare with.\n\t * @returns {Boolean} `true` if positions have the same parent, `false` otherwise.\n\t */\n\thasSameParentAs( position ) {\n\t\tif ( this.root !== position.root ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst thisParentPath = this.getParentPath();\n\t\tconst posParentPath = position.getParentPath();\n\n\t\treturn compareArrays( thisParentPath, posParentPath ) == 'same';\n\t}\n\n\t/**\n\t * Returns a copy of this position that is transformed by given `operation`.\n\t *\n\t * The new position's parameters are updated accordingly to the effect of the `operation`.\n\t *\n\t * For example, if `n` nodes are inserted before the position, the returned position {@link ~Position#offset} will be\n\t * increased by `n`. If the position was in a merged element, it will be accordingly moved to the new element, etc.\n\t *\n\t * This method is safe to use it on non-existing positions (for example during operational transformation).\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to transform by.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\tgetTransformedByOperation( operation ) {\n\t\tlet result;\n\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert':\n\t\t\t\tresult = this._getTransformedByInsertOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'move':\n\t\t\tcase 'remove':\n\t\t\tcase 'reinsert':\n\t\t\t\tresult = this._getTransformedByMoveOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'split':\n\t\t\t\tresult = this._getTransformedBySplitOperation( operation );\n\t\t\t\tbreak;\n\t\t\tcase 'merge':\n\t\t\t\tresult = this._getTransformedByMergeOperation( operation );\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tresult = Position._createAt( this );\n\t\t\t\tbreak;\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by an insert operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/insertoperation~InsertOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByInsertOperation( operation ) {\n\t\treturn this._getTransformedByInsertion( operation.position, operation.howMany );\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by a move operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/moveoperation~MoveOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByMoveOperation( operation ) {\n\t\treturn this._getTransformedByMove( operation.sourcePosition, operation.targetPosition, operation.howMany );\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by a split operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/splitoperation~SplitOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedBySplitOperation( operation ) {\n\t\tconst movedRange = operation.movedRange;\n\n\t\tconst isContained = movedRange.containsPosition( this ) ||\n\t\t\t( movedRange.start.isEqual( this ) && this.stickiness == 'toNext' );\n\n\t\tif ( isContained ) {\n\t\t\treturn this._getCombined( operation.splitPosition, operation.moveTargetPosition );\n\t\t} else {\n\t\t\tif ( operation.graveyardPosition ) {\n\t\t\t\treturn this._getTransformedByMove( operation.graveyardPosition, operation.insertionPosition, 1 );\n\t\t\t} else {\n\t\t\t\treturn this._getTransformedByInsertion( operation.insertionPosition, 1 );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns a copy of this position transformed by merge operation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/mergeoperation~MergeOperation} operation\n\t * @returns {module:engine/model/position~Position}\n\t */\n\t_getTransformedByMergeOperation( operation ) {\n\t\tconst movedRange = operation.movedRange;\n\t\tconst isContained = movedRange.containsPosition( this ) || movedRange.start.isEqual( this );\n\n\t\tlet pos;\n\n\t\tif ( isContained ) {\n\t\t\tpos = this._getCombined( operation.sourcePosition, operation.targetPosition );\n\n\t\t\tif ( operation.sourcePosition.isBefore( operation.targetPosition ) ) {\n\t\t\t\t// Above happens during OT when the merged element is moved before the merged-to element.\n\t\t\t\tpos = pos._getTransformedByDeletion( operation.deletionPosition, 1 );\n\t\t\t}\n\t\t} else if ( this.isEqual( operation.deletionPosition ) ) {\n\t\t\tpos = Position._createAt( operation.deletionPosition );\n\t\t} else {\n\t\t\tpos = this._getTransformedByMove( operation.deletionPosition, operation.graveyardPosition, 1 );\n\t\t}\n\n\t\treturn pos;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by removing `howMany` nodes starting from `deletePosition`.\n\t * It may happen that this position is in a removed node. If that is the case, `null` is returned instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} deletePosition Position before the first removed node.\n\t * @param {Number} howMany How many nodes are removed.\n\t * @returns {module:engine/model/position~Position|null} Transformed position or `null`.\n\t */\n\t_getTransformedByDeletion( deletePosition, howMany ) {\n\t\tconst transformed = Position._createAt( this );\n\n\t\t// This position can't be affected if deletion was in a different root.\n\t\tif ( this.root != deletePosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are removed from the node that is pointed by this position...\n\t\t\tif ( deletePosition.offset < this.offset ) {\n\t\t\t\t// And are removed from before an offset of that position...\n\t\t\t\tif ( deletePosition.offset + howMany > this.offset ) {\n\t\t\t\t\t// Position is in removed range, it's no longer in the tree.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Decrement the offset accordingly.\n\t\t\t\t\ttransformed.offset -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t} else if ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are removed from a node that is on a path to this position...\n\t\t\tconst i = deletePosition.path.length - 1;\n\n\t\t\tif ( deletePosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are removed from before next node of that path...\n\t\t\t\tif ( deletePosition.offset + howMany > this.path[ i ] ) {\n\t\t\t\t\t// If the next node of that path is removed return null\n\t\t\t\t\t// because the node containing this position got removed.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, decrement index on that path.\n\t\t\t\t\ttransformed.path[ i ] -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by inserting `howMany` nodes at `insertPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany ) {\n\t\tconst transformed = Position._createAt( this );\n\n\t\t// This position can't be affected if insertion was in a different root.\n\t\tif ( this.root != insertPosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are inserted in the node that is pointed by this position...\n\t\t\tif ( insertPosition.offset < this.offset || ( insertPosition.offset == this.offset && this.stickiness != 'toPrevious' ) ) {\n\t\t\t\t// And are inserted before an offset of that position...\n\t\t\t\t// \"Push\" this positions offset.\n\t\t\t\ttransformed.offset += howMany;\n\t\t\t}\n\t\t} else if ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are inserted in a node that is on a path to this position...\n\t\t\tconst i = insertPosition.path.length - 1;\n\n\t\t\tif ( insertPosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are inserted before next node of that path...\n\t\t\t\t// \"Push\" the index on that path.\n\t\t\t\ttransformed.path[ i ] += howMany;\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position before the first element to move.\n\t * @param {module:engine/model/position~Position} targetPosition Position where moved elements will be inserted.\n\t * @param {Number} howMany How many consecutive nodes to move, starting from `sourcePosition`.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany ) {\n\t\t// Update target position, as it could be affected by nodes removal.\n\t\ttargetPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( sourcePosition.isEqual( targetPosition ) ) {\n\t\t\t// If `targetPosition` is equal to `sourcePosition` this isn't really any move. Just return position as it is.\n\t\t\treturn Position._createAt( this );\n\t\t}\n\n\t\t// Moving a range removes nodes from their original position. We acknowledge this by proper transformation.\n\t\tconst transformed = this._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tconst isMoved = transformed === null ||\n\t\t\t( sourcePosition.isEqual( this ) && this.stickiness == 'toNext' ) ||\n\t\t\t( sourcePosition.getShiftedBy( howMany ).isEqual( this ) && this.stickiness == 'toPrevious' );\n\n\t\tif ( isMoved ) {\n\t\t\t// This position is inside moved range (or sticks to it).\n\t\t\t// In this case, we calculate a combination of this position, move source position and target position.\n\t\t\treturn this._getCombined( sourcePosition, targetPosition );\n\t\t} else {\n\t\t\t// This position is not inside a removed range.\n\t\t\t//\n\t\t\t// In next step, we simply reflect inserting `howMany` nodes, which might further affect the position.\n\t\t\treturn transformed._getTransformedByInsertion( targetPosition, howMany );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a new position that is a combination of this position and given positions.\n\t *\n\t * The combined position is a copy of this position transformed by moving a range starting at `source` position\n\t * to the `target` position. It is expected that this position is inside the moved range.\n\t *\n\t * Example:\n\t *\n\t *\t\tlet original = model.createPositionFromPath( root, [ 2, 3, 1 ] );\n\t *\t\tlet source = model.createPositionFromPath( root, [ 2, 2 ] );\n\t *\t\tlet target = model.createPositionFromPath( otherRoot, [ 1, 1, 3 ] );\n\t *\t\toriginal._getCombined( source, target ); // path is [ 1, 1, 4, 1 ], root is `otherRoot`\n\t *\n\t * Explanation:\n\t *\n\t * We have a position `[ 2, 3, 1 ]` and move some nodes from `[ 2, 2 ]` to `[ 1, 1, 3 ]`. The original position\n\t * was inside moved nodes and now should point to the new place. The moved nodes will be after\n\t * positions `[ 1, 1, 3 ]`, `[ 1, 1, 4 ]`, `[ 1, 1, 5 ]`. Since our position was in the second moved node,\n\t * the transformed position will be in a sub-tree of a node at `[ 1, 1, 4 ]`. Looking at original path, we\n\t * took care of `[ 2, 3 ]` part of it. Now we have to add the rest of the original path to the transformed path.\n\t * Finally, the transformed position will point to `[ 1, 1, 4, 1 ]`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} source Beginning of the moved range.\n\t * @param {module:engine/model/position~Position} target Position where the range is moved.\n\t * @returns {module:engine/model/position~Position} Combined position.\n\t */\n\t_getCombined( source, target ) {\n\t\tconst i = source.path.length - 1;\n\n\t\t// The first part of a path to combined position is a path to the place where nodes were moved.\n\t\tconst combined = Position._createAt( target );\n\t\tcombined.stickiness = this.stickiness;\n\n\t\t// Then we have to update the rest of the path.\n\n\t\t// Fix the offset because this position might be after `from` position and we have to reflect that.\n\t\tcombined.offset = combined.offset + this.path[ i ] - source.offset;\n\n\t\t// Then, add the rest of the path.\n\t\t// If this position is at the same level as `from` position nothing will get added.\n\t\tcombined.path = combined.path.concat( this.path.slice( i + 1 ) );\n\n\t\treturn combined;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\treturn {\n\t\t\troot: this.root.toJSON(),\n\t\t\tpath: Array.from( this.path ),\n\t\t\tstickiness: this.stickiness\n\t\t};\n\t}\n\n\t/**\n\t * Returns a new position that is equal to current position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.root, this.path, this.stickiness );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/model/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/model/item~Item model item} and `'before'` or `'after'` (sets position before or after given model item).\n\t *\n\t * This method is a shortcut to other factory methods such as:\n\t *\n\t * * {@link module:engine/model/position~Position._createBefore},\n\t * * {@link module:engine/model/position~Position._createAfter}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when the\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness. Used only when the\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @protected\n\t */\n\tstatic _createAt( itemOrPosition, offset, stickiness = 'toNone' ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn new Position( itemOrPosition.root, itemOrPosition.path, itemOrPosition.stickiness );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.maxOffset;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this._createBefore( node, stickiness );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this._createAfter( node, stickiness );\n\t\t\t} else if ( offset !== 0 && !offset ) {\n\t\t\t\t/**\n\t\t\t\t * {@link module:engine/model/model~Model#createPositionAt `Model#createPositionAt()`}\n\t\t\t\t * requires the offset to be specified when the first parameter is a model item.\n\t\t\t\t *\n\t\t\t\t * @error model-createPositionAt-offset-required\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-createPositionAt-offset-required: ' +\n\t\t\t\t\t'Model#createPositionAt() requires the offset when the first parameter is a model item.',\n\t\t\t\t\t[ this, itemOrPosition ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( !node.is( 'element' ) && !node.is( 'documentFragment' ) ) {\n\t\t\t\t/**\n\t\t\t\t * Position parent have to be a model element or model document fragment.\n\t\t\t\t *\n\t\t\t\t * @error model-position-parent-incorrect\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-position-parent-incorrect: Position parent have to be a element or document fragment.',\n\t\t\t\t\t[ this, itemOrPosition ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tconst path = node.getPath();\n\n\t\t\tpath.push( offset );\n\n\t\t\treturn new this( node.root, path, stickiness );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position, after given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * @returns {module:engine/model/position~Position}\n\t * @protected\n\t */\n\tstatic _createAfter( item, stickiness ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root element.\n\t\t\t *\n\t\t\t * @error model-position-after-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-after-root: You cannot make a position after root.',\n\t\t\t\t[ this, item ],\n\t\t\t\t{ root: item }\n\t\t\t);\n\t\t}\n\n\t\treturn this._createAt( item.parent, item.endOffset, stickiness );\n\t}\n\n\t/**\n\t * Creates a new position, before the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item before which the position should be placed.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * @returns {module:engine/model/position~Position}\n\t * @protected\n\t */\n\tstatic _createBefore( item, stickiness ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position before a root element.\n\t\t\t *\n\t\t\t * @error model-position-before-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-before-root: You cannot make a position before root.',\n\t\t\t\titem,\n\t\t\t\t{ root: item }\n\t\t\t);\n\t\t}\n\n\t\treturn this._createAt( item.parent, item.startOffset, stickiness );\n\t}\n\n\t/**\n\t * Creates a `Position` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Position`.\n\t * @param {module:engine/model/document~Document} doc Document object that will be position owner.\n\t * @returns {module:engine/model/position~Position} `Position` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\tif ( json.root === '$graveyard' ) {\n\t\t\tconst pos = new Position( doc.graveyard, json.path );\n\t\t\tpos.stickiness = json.stickiness;\n\n\t\t\treturn pos;\n\t\t}\n\n\t\tif ( !doc.getRoot( json.root ) ) {\n\t\t\t/**\n\t\t\t * Cannot create position for document. Root with specified name does not exist.\n\t\t\t *\n\t\t\t * @error model-position-fromjson-no-root\n\t\t\t * @param {String} rootName\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-fromjson-no-root: Cannot create position for document. Root with specified name does not exist.',\n\t\t\t\tdoc,\n\t\t\t\t{ rootName: json.root }\n\t\t\t);\n\t\t}\n\n\t\treturn new Position( doc.getRoot( json.root ), json.path, json.stickiness );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `${ this.root } [ ${ this.path.join( ', ' ) } ]`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelPosition: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/model/position~PositionRelation\n */\n\n/**\n * Represents how position is \"sticking\" with neighbour nodes. Used to define how position should be transformed (moved)\n * in edge cases. Possible values: `'toNone'`, `'toNext'`, `'toPrevious'`.\n *\n * Examples:\n *\n *\t\tInsert. Position is at | and nodes are inserted at the same position, marked as ^:\n *\n *\t\t- sticks to none: <p>f^|oo</p> -> <p>fbar|oo</p>\n *\t\t- sticks to next node: <p>f^|oo</p> -> <p>fbar|oo</p>\n *\t\t- sticks to previous node: <p>f|^oo</p> -> <p>f|baroo</p>\n *\n *\n *\t\tMove. Position is at | and range [oo] is moved to position ^:\n *\n *\t\t- sticks to none: <p>f|[oo]</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\t\t- sticks to none: <p>f[oo]|</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\n *\t\t- sticks to next node: <p>f|[oo]</p><p>b^ar</p> -> <p>f</p><p>b|ooar</p>\n *\t\t- sticks to next node: <p>f[oo]|</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\n *\t\t- sticks to previous node: <p>f|[oo]</p><p>b^ar</p> -> <p>f|</p><p>booar</p>\n *\t\t- sticks to previous node: <p>f[oo]|</p><p>b^ar</p> -> <p>f</p><p>boo|ar</p>\n *\n * @typedef {String} module:engine/model/position~PositionStickiness\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/range\n */\n\nimport Position from './position';\nimport TreeWalker from './treewalker';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\n/**\n * Represents a range in the model tree.\n *\n * A range is defined by its {@link module:engine/model/range~Range#start} and {@link module:engine/model/range~Range#end}\n * positions.\n *\n * You can create range instances via its constructor or the `createRange*()` factory methods of\n * {@link module:engine/model/model~Model} and {@link module:engine/model/writer~Writer}.\n */\nexport default class Range {\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t */\n\tconstructor( start, end = null ) {\n\t\t/**\n\t\t * Start position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.start = Position._createAt( start );\n\n\t\t/**\n\t\t * End position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.end = end ? Position._createAt( end ) : Position._createAt( start );\n\n\t\t// If the range is collapsed, treat in a similar way as a position and set its boundaries stickiness to 'toNone'.\n\t\t// In other case, make the boundaries stick to the \"inside\" of the range.\n\t\tthis.start.stickiness = this.isCollapsed ? 'toNone' : 'toNext';\n\t\tthis.end.stickiness = this.isCollapsed ? 'toNone' : 'toPrevious';\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them together with additional information like length or {@link module:engine/model/position~Position positions},\n\t * grouped as {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t * It iterates over all {@link module:engine/model/textproxy~TextProxy text contents} that are inside the range\n\t * and all the {@link module:engine/model/element~Element}s that are entered into when iterating over this range.\n\t *\n\t * This iterator uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range\n\t * and `ignoreElementEnd` option set to `true`.\n\t *\n\t * @returns {Iterable.<module:engine/model/treewalker~TreeWalkerValue>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tyield* new TreeWalker( { boundaries: this, ignoreElementEnd: true } );\n\t}\n\n\t/**\n\t * Returns whether the range is collapsed, that is if {@link #start} and\n\t * {@link #end} positions are equal.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.start.isEqual( this.end );\n\t}\n\n\t/**\n\t * Returns whether this range is flat, that is if {@link #start} position and\n\t * {@link #end} position are in the same {@link module:engine/model/position~Position#parent}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isFlat() {\n\t\tconst startParentPath = this.start.getParentPath();\n\t\tconst endParentPath = this.end.getParentPath();\n\n\t\treturn compareArrays( startParentPath, endParentPath ) == 'same';\n\t}\n\n\t/**\n\t * Range root element.\n\t *\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.start.root;\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/model/position~Position position}.\n\t *\n\t * @param {module:engine/model/position~Position} position Position to check.\n\t * @returns {Boolean} `true` if given {@link module:engine/model/position~Position position} is contained\n\t * in this range,`false` otherwise.\n\t */\n\tcontainsPosition( position ) {\n\t\treturn position.isAfter( this.start ) && position.isBefore( this.end );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link ~Range range}.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check.\n\t * @param {Boolean} [loose=false] Whether the check is loose or strict. If the check is strict (`false`), compared range cannot\n\t * start or end at the same position as this range boundaries. If the check is loose (`true`), compared range can start, end or\n\t * even be equal to this range. Note that collapsed ranges are always compared in strict mode.\n\t * @returns {Boolean} `true` if given {@link ~Range range} boundaries are contained by this range, `false` otherwise.\n\t */\n\tcontainsRange( otherRange, loose = false ) {\n\t\tif ( otherRange.isCollapsed ) {\n\t\t\tloose = false;\n\t\t}\n\n\t\tconst containsStart = this.containsPosition( otherRange.start ) || ( loose && this.start.isEqual( otherRange.start ) );\n\t\tconst containsEnd = this.containsPosition( otherRange.end ) || ( loose && this.end.isEqual( otherRange.end ) );\n\n\t\treturn containsStart && containsEnd;\n\t}\n\n\t/**\n\t * Checks whether given {@link module:engine/model/item~Item} is inside this range.\n\t *\n\t * @param {module:engine/model/item~Item} item Model item to check.\n\t */\n\tcontainsItem( item ) {\n\t\tconst pos = Position._createBefore( item );\n\n\t\treturn this.containsPosition( pos ) || this.start.isEqual( pos );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trange.is( 'range' ); // -> true\n\t *\t\trange.is( 'model:range' ); // -> true\n\t *\n\t *\t\trange.is( 'view:range' ); // -> false\n\t *\t\trange.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'range' || type == 'model:range';\n\t}\n\n\t/**\n\t * Two ranges are equal if their {@link #start} and {@link #end} positions are equal.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges are equal, `false` otherwise.\n\t */\n\tisEqual( otherRange ) {\n\t\treturn this.start.isEqual( otherRange.start ) && this.end.isEqual( otherRange.end );\n\t}\n\n\t/**\n\t * Checks and returns whether this range intersects with given range.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges intersect, `false` otherwise.\n\t */\n\tisIntersecting( otherRange ) {\n\t\treturn this.start.isBefore( otherRange.end ) && this.end.isAfter( otherRange.start );\n\t}\n\n\t/**\n\t * Computes which part(s) of this {@link ~Range range} is not a part of given {@link ~Range range}.\n\t * Returned array contains zero, one or two {@link ~Range ranges}.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 5 ] ) );\n\t *\t\tlet transformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has no ranges because `otherRange` contains `range`\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 3 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has one range: from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 4 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3 ] and from [ 4 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to differentiate against.\n\t * @returns {Array.<module:engine/model/range~Range>} The difference between ranges.\n\t */\n\tgetDifference( otherRange ) {\n\t\tconst ranges = [];\n\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect.\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the start to the middle of this range.\n\t\t\t\tranges.push( new Range( this.start, otherRange.start ) );\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the middle of this range to the end.\n\t\t\t\tranges.push( new Range( otherRange.end, this.end ) );\n\t\t\t}\n\t\t} else {\n\t\t\t// Ranges do not intersect, return the original range.\n\t\t\tranges.push( new Range( this.start, this.end ) );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an intersection of this {@link ~Range range} and given {@link ~Range range}.\n\t * Intersection is a common part of both of those ranges. If ranges has no common part, returns `null`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 2 ] ) );\n\t *\t\tlet transformed = range.getIntersection( otherRange ); // null - ranges have no common part\n\t *\n\t *\t\totherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 5 ] ) );\n\t *\t\ttransformed = range.getIntersection( otherRange ); // range from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check for intersection.\n\t * @returns {module:engine/model/range~Range|null} A common part of given ranges or `null` if ranges have no common part.\n\t */\n\tgetIntersection( otherRange ) {\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect, so a common range will be returned.\n\t\t\t// At most, it will be same as this range.\n\t\t\tlet commonRangeStart = this.start;\n\t\t\tlet commonRangeEnd = this.end;\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means thaNt we have to\n\t\t\t\t// shrink common range to the given range start.\n\t\t\t\tcommonRangeStart = otherRange.start;\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// shrink common range to the given range end.\n\t\t\t\tcommonRangeEnd = otherRange.end;\n\t\t\t}\n\n\t\t\treturn new Range( commonRangeStart, commonRangeEnd );\n\t\t}\n\n\t\t// Ranges do not intersect, so they do not have common part.\n\t\treturn null;\n\t}\n\n\t/**\n\t * Computes and returns the smallest set of {@link #isFlat flat} ranges, that covers this range in whole.\n\t *\n\t * See an example of a model structure (`[` and `]` are range boundaries):\n\t *\n\t *\t\troot root\n\t *\t\t |- element DIV DIV P2 P3 DIV\n\t *\t\t | |- element H H P1 f o o b a r H P4\n\t *\t\t | | |- \"fir[st\" fir[st lorem se]cond ipsum\n\t *\t\t | |- element P1\n\t *\t\t | | |- \"lorem\" ||\n\t *\t\t |- element P2 ||\n\t *\t\t | |- \"foo\" VV\n\t *\t\t |- element P3\n\t *\t\t | |- \"bar\" root\n\t *\t\t |- element DIV DIV [P2 P3] DIV\n\t *\t\t | |- element H H [P1] f o o b a r H P4\n\t *\t\t | | |- \"se]cond\" fir[st] lorem [se]cond ipsum\n\t *\t\t | |- element P4\n\t *\t\t | | |- \"ipsum\"\n\t *\n\t * As it can be seen, letters contained in the range are: `stloremfoobarse`, spread across different parents.\n\t * We are looking for minimal set of flat ranges that contains the same nodes.\n\t *\n\t * Minimal flat ranges for above range `( [ 0, 0, 3 ], [ 3, 0, 2 ] )` will be:\n\t *\n\t *\t\t( [ 0, 0, 3 ], [ 0, 0, 5 ] ) = \"st\"\n\t *\t\t( [ 0, 1 ], [ 0, 2 ] ) = element P1 (\"lorem\")\n\t *\t\t( [ 1 ], [ 3 ] ) = element P2, element P3 (\"foobar\")\n\t *\t\t( [ 3, 0, 0 ], [ 3, 0, 2 ] ) = \"se\"\n\t *\n\t * **Note:** if an {@link module:engine/model/element~Element element} is not wholly contained in this range, it won't be returned\n\t * in any of the returned flat ranges. See in the example how `H` elements at the beginning and at the end of the range\n\t * were omitted. Only their parts that were wholly in the range were returned.\n\t *\n\t * **Note:** this method is not returning flat ranges that contain no nodes.\n\t *\n\t * @returns {Array.<module:engine/model/range~Range>} Array of flat ranges covering this range.\n\t */\n\tgetMinimalFlatRanges() {\n\t\tconst ranges = [];\n\t\tconst diffAt = this.start.getCommonPath( this.end ).length;\n\n\t\tconst pos = Position._createAt( this.start );\n\t\tlet posParent = pos.parent;\n\n\t\t// Go up.\n\t\twhile ( pos.path.length > diffAt + 1 ) {\n\t\t\tconst howMany = posParent.maxOffset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.path = pos.path.slice( 0, -1 );\n\t\t\tpos.offset++;\n\t\t\tposParent = posParent.parent;\n\t\t}\n\n\t\t// Go down.\n\t\twhile ( pos.path.length <= this.end.path.length ) {\n\t\t\tconst offset = this.end.path[ pos.path.length - 1 ];\n\t\t\tconst howMany = offset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.offset = offset;\n\t\t\tpos.path.push( 0 );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/treewalker~TreeWalker TreeWalker} instance with this range as a boundary.\n\t *\n\t * For example, to iterate over all items in the entire document root:\n\t *\n\t *\t\t// Create a range spanning over the entire root content:\n\t *\t\tconst range = editor.model.createRangeIn( editor.model.document.getRoot() );\n\t *\n\t *\t\t// Iterate over all items in this range:\n\t *\t\tfor ( const value of range.getWalker() ) {\n\t *\t\t\tconsole.log( value.item );\n\t *\t\t}\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @param {module:engine/model/position~Position} [options.startPosition]\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range and `ignoreElementEnd` option\n\t * set to `true`. However it returns only {@link module:engine/model/item~Item model items},\n\t * not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @method getItems\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/model/item~Item>}\n\t */\n\t* getItems( options = {} ) {\n\t\toptions.boundaries = this;\n\t\toptions.ignoreElementEnd = true;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.item;\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/position~Position positions} that are boundaries or\n\t * contained in this range.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range. However it returns only\n\t * {@link module:engine/model/position~Position positions}, not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.<module:engine/model/position~Position>}\n\t */\n\t* getPositions( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tyield treeWalker.position;\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.nextPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by given `operation`.\n\t *\n\t * **Note:** transformation may break one range into multiple ranges (for example, when a part of the range is\n\t * moved to a different part of document tree). For this reason, an array is returned by this method and it\n\t * may contain one or more `Range` instances.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to transform range by.\n\t * @returns {Array.<module:engine/model/range~Range>} Range which is the result of transformation.\n\t */\n\tgetTransformedByOperation( operation ) {\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert':\n\t\t\t\treturn this._getTransformedByInsertOperation( operation );\n\t\t\tcase 'move':\n\t\t\tcase 'remove':\n\t\t\tcase 'reinsert':\n\t\t\t\treturn this._getTransformedByMoveOperation( operation );\n\t\t\tcase 'split':\n\t\t\t\treturn [ this._getTransformedBySplitOperation( operation ) ];\n\t\t\tcase 'merge':\n\t\t\t\treturn [ this._getTransformedByMergeOperation( operation ) ];\n\t\t}\n\n\t\treturn [ new Range( this.start, this.end ) ];\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by multiple `operations`.\n\t *\n\t * @see ~Range#getTransformedByOperation\n\t * @param {Iterable.<module:engine/model/operation/operation~Operation>} operations Operations to transform the range by.\n\t * @returns {Array.<module:engine/model/range~Range>} Range which is the result of transformation.\n\t */\n\tgetTransformedByOperations( operations ) {\n\t\tconst ranges = [ new Range( this.start, this.end ) ];\n\n\t\tfor ( const operation of operations ) {\n\t\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\t\tconst result = ranges[ i ].getTransformedByOperation( operation );\n\n\t\t\t\tranges.splice( i, 1, ...result );\n\t\t\t\ti += result.length - 1;\n\t\t\t}\n\t\t}\n\n\t\t// It may happen that a range is split into two, and then the part of second \"piece\" is moved into first\n\t\t// \"piece\". In this case we will have incorrect third range, which should not be included in the result --\n\t\t// because it is already included in the first \"piece\". In this loop we are looking for all such ranges that\n\t\t// are inside other ranges and we simply remove them.\n\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\tconst range = ranges[ i ];\n\n\t\t\tfor ( let j = i + 1; j < ranges.length; j++ ) {\n\t\t\t\tconst next = ranges[ j ];\n\n\t\t\t\tif ( range.containsRange( next ) || next.containsRange( range ) || range.isEqual( next ) ) {\n\t\t\t\t\tranges.splice( j, 1 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of the range's both ends (in which the entire range is contained).\n\t *\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor() {\n\t\treturn this.start.getCommonAncestor( this.end );\n\t}\n\n\t/**\n\t * Converts `Range` to plain object and returns it.\n\t *\n\t * @returns {Object} `Node` converted to plain object.\n\t */\n\ttoJSON() {\n\t\treturn {\n\t\t\tstart: this.start.toJSON(),\n\t\t\tend: this.end.toJSON()\n\t\t};\n\t}\n\n\t/**\n\t * Returns a new range that is equal to current range.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.start, this.end );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by insert operation.\n\t *\n\t * One or more ranges may be returned as a result of this transformation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/insertoperation~InsertOperation} operation\n\t * @returns {Array.<module:engine/model/range~Range>}\n\t */\n\t_getTransformedByInsertOperation( operation, spread = false ) {\n\t\treturn this._getTransformedByInsertion( operation.position, operation.howMany, spread );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by move operation.\n\t *\n\t * One or more ranges may be returned as a result of this transformation.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/moveoperation~MoveOperation} operation\n\t * @returns {Array.<module:engine/model/range~Range>}\n\t */\n\t_getTransformedByMoveOperation( operation, spread = false ) {\n\t\tconst sourcePosition = operation.sourcePosition;\n\t\tconst howMany = operation.howMany;\n\t\tconst targetPosition = operation.targetPosition;\n\n\t\treturn this._getTransformedByMove( sourcePosition, targetPosition, howMany, spread );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by split operation.\n\t *\n\t * Always one range is returned. The transformation is done in a way to not break the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/splitoperation~SplitOperation} operation\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getTransformedBySplitOperation( operation ) {\n\t\tconst start = this.start._getTransformedBySplitOperation( operation );\n\t\tlet end = this.end._getTransformedBySplitOperation( operation );\n\n\t\tif ( this.end.isEqual( operation.insertionPosition ) ) {\n\t\t\tend = this.end.getShiftedBy( 1 );\n\t\t}\n\n\t\t// Below may happen when range contains graveyard element used by split operation.\n\t\tif ( start.root != end.root ) {\n\t\t\t// End position was next to the moved graveyard element and was moved with it.\n\t\t\t// Fix it by using old `end` which has proper `root`.\n\t\t\tend = this.end.getShiftedBy( -1 );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Returns a result of transforming a copy of this range by merge operation.\n\t *\n\t * Always one range is returned. The transformation is done in a way to not break the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/operation/mergeoperation~MergeOperation} operation\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getTransformedByMergeOperation( operation ) {\n\t\t// Special case when the marker is set on \"the closing tag\" of an element. Marker can be set like that during\n\t\t// transformations, especially when a content of a few block elements were removed. For example:\n\t\t//\n\t\t// {} is the transformed range, [] is the removed range.\n\t\t// <p>F[o{o</p><p>B}ar</p><p>Xy]z</p>\n\t\t//\n\t\t// <p>Fo{o</p><p>B}ar</p><p>z</p>\n\t\t// <p>F{</p><p>B}ar</p><p>z</p>\n\t\t// <p>F{</p>}<p>z</p>\n\t\t// <p>F{}z</p>\n\t\t//\n\t\tif ( this.start.isEqual( operation.targetPosition ) && this.end.isEqual( operation.deletionPosition ) ) {\n\t\t\treturn new Range( this.start );\n\t\t}\n\n\t\tlet start = this.start._getTransformedByMergeOperation( operation );\n\t\tlet end = this.end._getTransformedByMergeOperation( operation );\n\n\t\tif ( start.root != end.root ) {\n\t\t\t// This happens when the end position was next to the merged (deleted) element.\n\t\t\t// Then, the end position was moved to the graveyard root. In this case we need to fix\n\t\t\t// the range cause its boundaries would be in different roots.\n\t\t\tend = this.end.getShiftedBy( -1 );\n\t\t}\n\n\t\tif ( start.isAfter( end ) ) {\n\t\t\t// This happens in three following cases:\n\t\t\t//\n\t\t\t// Case 1: Merge operation source position is before the target position (due to some transformations, OT, etc.)\n\t\t\t// This means that start can be moved before the end of the range.\n\t\t\t//\n\t\t\t// Before: <p>a{a</p><p>b}b</p><p>cc</p>\n\t\t\t// Merge: <p>b}b</p><p>cca{a</p>\n\t\t\t// Fix: <p>{b}b</p><p>ccaa</p>\n\t\t\t//\n\t\t\t// Case 2: Range start is before merged node but not directly.\n\t\t\t// Result should include all nodes that were in the original range.\n\t\t\t//\n\t\t\t// Before: <p>aa</p>{<p>cc</p><p>b}b</p>\n\t\t\t// Merge: <p>aab}b</p>{<p>cc</p>\n\t\t\t// Fix: <p>aa{bb</p><p>cc</p>}\n\t\t\t//\n\t\t\t// The range is expanded by an additional `b` letter but it is better than dropping the whole `cc` paragraph.\n\t\t\t//\n\t\t\t// Case 3: Range start is directly before merged node.\n\t\t\t// Resulting range should include only nodes from the merged element:\n\t\t\t//\n\t\t\t// Before: <p>aa</p>{<p>b}b</p><p>cc</p>\n\t\t\t// Merge: <p>aab}b</p>{<p>cc</p>\n\t\t\t// Fix: <p>aa{b}b</p><p>cc</p>\n\t\t\t//\n\n\t\t\tif ( operation.sourcePosition.isBefore( operation.targetPosition ) ) {\n\t\t\t\t// Case 1.\n\t\t\t\tstart = Position._createAt( end );\n\t\t\t\tstart.offset = 0;\n\t\t\t} else {\n\t\t\t\tif ( !operation.deletionPosition.isEqual( start ) ) {\n\t\t\t\t\t// Case 2.\n\t\t\t\t\tend = operation.deletionPosition;\n\t\t\t\t}\n\n\t\t\t\t// In both case 2 and 3 start is at the end of the merge-to element.\n\t\t\t\tstart = operation.targetPosition;\n\t\t\t}\n\n\t\t\treturn new Range( start, end );\n\t\t}\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Returns an array containing one or two {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by inserting `howMany` nodes at `insertPosition`. Two {@link ~Range ranges} are\n\t * returned if the insertion was inside this {@link ~Range range} and `spread` is set to `true`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = model.createRange(\n\t *\t\t\tmodel.createPositionFromPath( root, [ 2, 7 ] ),\n\t *\t\t\tmodel.createPositionFromPath( root, [ 4, 0, 1 ] )\n\t *\t\t);\n\t *\t\tlet transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 1 ] ), 2 );\n\t *\t\t// transformed array has one range from [ 4, 7 ] to [ 6, 0, 1 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 4, 0, 0 ] ), 4 );\n\t *\t\t// transformed array has one range from [ 2, 7 ] to [ 4, 0, 5 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4 );\n\t *\t\t// transformed array has one range, which is equal to original range\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4, true );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3, 2 ] and from [ 3, 6 ] to [ 4, 0, 1 ]\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @param {Boolean} [spread] Flag indicating whether this {~Range range} should be spread if insertion\n\t * was inside the range. Defaults to `false`.\n\t * @returns {Array.<module:engine/model/range~Range>} Result of the transformation.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany, spread = false ) {\n\t\tif ( spread && this.containsPosition( insertPosition ) ) {\n\t\t\t// Range has to be spread. The first part is from original start to the spread point.\n\t\t\t// The other part is from spread point to the original end, but transformed by\n\t\t\t// insertion to reflect insertion changes.\n\n\t\t\treturn [\n\t\t\t\tnew Range( this.start, insertPosition ),\n\t\t\t\tnew Range(\n\t\t\t\t\tinsertPosition.getShiftedBy( howMany ),\n\t\t\t\t\tthis.end._getTransformedByInsertion( insertPosition, howMany )\n\t\t\t\t)\n\t\t\t];\n\t\t} else {\n\t\t\tconst range = new Range( this.start, this.end );\n\n\t\t\trange.start = range.start._getTransformedByInsertion( insertPosition, howMany );\n\t\t\trange.end = range.end._getTransformedByInsertion( insertPosition, howMany );\n\n\t\t\treturn [ range ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns an array containing {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position from which nodes are moved.\n\t * @param {module:engine/model/position~Position} targetPosition Position to where nodes are moved.\n\t * @param {Number} howMany How many nodes are moved.\n\t * @param {Boolean} [spread=false] Whether the range should be spread if the move points inside the range.\n\t * @returns {Array.<module:engine/model/range~Range>} Result of the transformation.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany, spread = false ) {\n\t\t// Special case for transforming a collapsed range. Just transform it like a position.\n\t\tif ( this.isCollapsed ) {\n\t\t\tconst newPos = this.start._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\n\t\t\treturn [ new Range( newPos ) ];\n\t\t}\n\n\t\t// Special case for transformation when a part of the range is moved towards the range.\n\t\t//\n\t\t// Examples:\n\t\t//\n\t\t// <div><p>ab</p><p>c[d</p></div><p>e]f</p> --> <div><p>ab</p></div><p>c[d</p><p>e]f</p>\n\t\t// <p>e[f</p><div><p>a]b</p><p>cd</p></div> --> <p>e[f</p><p>a]b</p><div><p>cd</p></div>\n\t\t//\n\t\t// Without this special condition, the default algorithm leaves an \"artifact\" range from one of `differenceSet` parts:\n\t\t//\n\t\t// <div><p>ab</p><p>c[d</p></div><p>e]f</p> --> <div><p>ab</p>{</div>}<p>c[d</p><p>e]f</p>\n\t\t//\n\t\t// This special case is applied only if the range is to be kept together (not spread).\n\t\tconst moveRange = Range._createFromPositionAndShift( sourcePosition, howMany );\n\t\tconst insertPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( this.containsPosition( targetPosition ) && !spread ) {\n\t\t\tif ( moveRange.containsPosition( this.start ) || moveRange.containsPosition( this.end ) ) {\n\t\t\t\tconst start = this.start._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\t\t\t\tconst end = this.end._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\n\t\t\t\treturn [ new Range( start, end ) ];\n\t\t\t}\n\t\t}\n\n\t\t// Default algorithm.\n\t\tlet result;\n\n\t\tconst differenceSet = this.getDifference( moveRange );\n\t\tlet difference = null;\n\n\t\tconst common = this.getIntersection( moveRange );\n\n\t\tif ( differenceSet.length == 1 ) {\n\t\t\t// `moveRange` and this range may intersect but may be separate.\n\t\t\tdifference = new Range(\n\t\t\t\tdifferenceSet[ 0 ].start._getTransformedByDeletion( sourcePosition, howMany ),\n\t\t\t\tdifferenceSet[ 0 ].end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} else if ( differenceSet.length == 2 ) {\n\t\t\t// `moveRange` is inside this range.\n\t\t\tdifference = new Range(\n\t\t\t\tthis.start,\n\t\t\t\tthis.end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} // else, `moveRange` contains this range.\n\n\t\tif ( difference ) {\n\t\t\tresult = difference._getTransformedByInsertion( insertPosition, howMany, common !== null || spread );\n\t\t} else {\n\t\t\tresult = [];\n\t\t}\n\n\t\tif ( common ) {\n\t\t\tconst transformedCommon = new Range(\n\t\t\t\tcommon.start._getCombined( moveRange.start, insertPosition ),\n\t\t\t\tcommon.end._getCombined( moveRange.start, insertPosition )\n\t\t\t);\n\n\t\t\tif ( result.length == 2 ) {\n\t\t\t\tresult.splice( 1, 0, transformedCommon );\n\t\t\t} else {\n\t\t\t\tresult.push( transformedCommon );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns a copy of this range that is transformed by deletion of `howMany` nodes from `deletePosition`.\n\t *\n\t * If the deleted range is intersecting with the transformed range, the transformed range will be shrank.\n\t *\n\t * If the deleted range contains transformed range, `null` will be returned.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} deletionPosition Position from which nodes are removed.\n\t * @param {Number} howMany How many nodes are removed.\n\t * @returns {module:engine/model/range~Range|null} Result of the transformation.\n\t */\n\t_getTransformedByDeletion( deletePosition, howMany ) {\n\t\tlet newStart = this.start._getTransformedByDeletion( deletePosition, howMany );\n\t\tlet newEnd = this.end._getTransformedByDeletion( deletePosition, howMany );\n\n\t\tif ( newStart == null && newEnd == null ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( newStart == null ) {\n\t\t\tnewStart = deletePosition;\n\t\t}\n\n\t\tif ( newEnd == null ) {\n\t\t\tnewEnd = deletePosition;\n\t\t}\n\n\t\treturn new Range( newStart, newEnd );\n\t}\n\n\t/**\n\t * Creates a new range, spreading from specified {@link module:engine/model/position~Position position} to a position moved by\n\t * given `shift`. If `shift` is a negative value, shifted position is treated as the beginning of the range.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} position Beginning of the range.\n\t * @param {Number} shift How long the range should be.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createFromPositionAndShift( position, shift ) {\n\t\tconst start = position;\n\t\tconst end = position.getShiftedBy( shift );\n\n\t\treturn shift > 0 ? new this( start, end ) : new this( end, start );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @protected\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createIn( element ) {\n\t\treturn new this( Position._createAt( element, 0 ), Position._createAt( element, element.maxOffset ) );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/model/item~Item model item} and ends after it.\n\t *\n\t * @protected\n\t * @param {module:engine/model/item~Item} item\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic _createOn( item ) {\n\t\treturn this._createFromPositionAndShift( Position._createBefore( item ), item.offsetSize );\n\t}\n\n\t/**\n\t * Combines all ranges from the passed array into a one range. At least one range has to be passed.\n\t * Passed ranges must not have common parts.\n\t *\n\t * The first range from the array is a reference range. If other ranges start or end on the exactly same position where\n\t * the reference range, they get combined into one range.\n\t *\n\t *\t\t[ ][] [ ][ ][ ][ ][] [ ] // Passed ranges, shown sorted\n\t *\t\t[ ] // The result of the function if the first range was a reference range.\n\t *\t [ ] // The result of the function if the third-to-seventh range was a reference range.\n\t *\t [ ] // The result of the function if the last range was a reference range.\n\t *\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to combine.\n\t * @returns {module:engine/model/range~Range} Combined range.\n\t */\n\tstatic _createFromRanges( ranges ) {\n\t\tif ( ranges.length === 0 ) {\n\t\t\t/**\n\t\t\t * At least one range has to be passed to\n\t\t\t * {@link module:engine/model/range~Range._createFromRanges `Range._createFromRanges()`}.\n\t\t\t *\n\t\t\t * @error range-create-from-ranges-empty-array\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'range-create-from-ranges-empty-array: At least one range has to be passed.',\n\t\t\t\tnull\n\t\t\t);\n\t\t} else if ( ranges.length == 1 ) {\n\t\t\treturn ranges[ 0 ].clone();\n\t\t}\n\n\t\t// 1. Set the first range in `ranges` array as a reference range.\n\t\t// If we are going to return just a one range, one of the ranges need to be the reference one.\n\t\t// Other ranges will be stuck to that range, if possible.\n\t\tconst ref = ranges[ 0 ];\n\n\t\t// 2. Sort all the ranges so it's easier to process them.\n\t\tranges.sort( ( a, b ) => {\n\t\t\treturn a.start.isAfter( b.start ) ? 1 : -1;\n\t\t} );\n\n\t\t// 3. Check at which index the reference range is now.\n\t\tconst refIndex = ranges.indexOf( ref );\n\n\t\t// 4. At this moment we don't need the original range.\n\t\t// We are going to modify the result and we need to return a new instance of Range.\n\t\t// We have to create a copy of the reference range.\n\t\tconst result = new this( ref.start, ref.end );\n\n\t\t// 5. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tif ( refIndex > 0 ) {\n\t\t\tfor ( let i = refIndex - 1; true; i++ ) {\n\t\t\t\tif ( ranges[ i ].end.isEqual( result.start ) ) {\n\t\t\t\t\tresult.start = Position._createAt( ranges[ i ].start );\n\t\t\t\t} else {\n\t\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// 6. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tfor ( let i = refIndex + 1; i < ranges.length; i++ ) {\n\t\t\tif ( ranges[ i ].start.isEqual( result.end ) ) {\n\t\t\t\tresult.end = Position._createAt( ranges[ i ].end );\n\t\t\t} else {\n\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Creates a `Range` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Range`.\n\t * @param {module:engine/model/document~Document} doc Document object that will be range owner.\n\t * @returns {module:engine/model/element~Element} `Range` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\treturn new this( Position.fromJSON( json.start, doc ), Position.fromJSON( json.end, doc ) );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `${ this.root } [ ${ this.start.path.join( ', ' ) } ] - [ ${ this.end.path.join( ', ' ) } ]`;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelPosition: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/mapper\n */\n\nimport ModelPosition from '../model/position';\nimport ModelRange from '../model/range';\n\nimport ViewPosition from '../view/position';\nimport ViewRange from '../view/range';\nimport ViewText from '../view/text';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Maps elements, positions and markers between {@link module:engine/view/document~Document the view} and\n * {@link module:engine/model/model the model}.\n *\n * The instance of the Mapper used for the editing pipeline is available in\n * {@link module:engine/controller/editingcontroller~EditingController#mapper `editor.editing.mapper`}.\n *\n * Mapper uses bound elements to find corresponding elements and positions, so, to get proper results,\n * all model elements should be {@link module:engine/conversion/mapper~Mapper#bindElements bound}.\n *\n * To map complex model to/from view relations, you may provide custom callbacks for\n * {@link module:engine/conversion/mapper~Mapper#event:modelToViewPosition modelToViewPosition event} and\n * {@link module:engine/conversion/mapper~Mapper#event:viewToModelPosition viewToModelPosition event} that are fired whenever\n * a position mapping request occurs.\n * Those events are fired by {@link module:engine/conversion/mapper~Mapper#toViewPosition toViewPosition}\n * and {@link module:engine/conversion/mapper~Mapper#toModelPosition toModelPosition} methods. `Mapper` adds it's own default callbacks\n * with `'lowest'` priority. To override default `Mapper` mapping, add custom callback with higher priority and\n * stop the event.\n */\nexport default class Mapper {\n\t/**\n\t * Creates an instance of the mapper.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Model element to view element mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._modelToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * View element to model element mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap}\n\t\t */\n\t\tthis._viewToModelMapping = new WeakMap();\n\n\t\t/**\n\t\t * A map containing callbacks between view element names and functions evaluating length of view elements\n\t\t * in model.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._viewToModelLengthCallbacks = new Map();\n\n\t\t/**\n\t\t * Model marker name to view elements mapping.\n\t\t *\n\t\t * Keys are `String`s while values are `Set`s with {@link module:engine/view/element~Element view elements}.\n\t\t * One marker (name) can be mapped to multiple elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._markerNameToElements = new Map();\n\n\t\t/**\n\t\t * View element to model marker names mapping.\n\t\t *\n\t\t * This is reverse to {@link ~Mapper#_markerNameToElements} map.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._elementToMarkerNames = new Map();\n\n\t\t/**\n\t\t * Stores marker names of markers which has changed due to unbinding a view element (so it is assumed that the view element\n\t\t * has been removed, moved or renamed).\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<module:engine/model/markercollection~Marker>}\n\t\t */\n\t\tthis._unboundMarkerNames = new Set();\n\n\t\t// Default mapper algorithm for mapping model position to view position.\n\t\tthis.on( 'modelToViewPosition', ( evt, data ) => {\n\t\t\tif ( data.viewPosition ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst viewContainer = this._modelToViewMapping.get( data.modelPosition.parent );\n\n\t\t\tdata.viewPosition = this._findPositionIn( viewContainer, data.modelPosition.offset );\n\t\t}, { priority: 'low' } );\n\n\t\t// Default mapper algorithm for mapping view position to model position.\n\t\tthis.on( 'viewToModelPosition', ( evt, data ) => {\n\t\t\tif ( data.modelPosition ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst viewBlock = this.findMappedViewAncestor( data.viewPosition );\n\t\t\tconst modelParent = this._viewToModelMapping.get( viewBlock );\n\t\t\tconst modelOffset = this._toModelOffset( data.viewPosition.parent, data.viewPosition.offset, viewBlock );\n\n\t\t\tdata.modelPosition = ModelPosition._createAt( modelParent, modelOffset );\n\t\t}, { priority: 'low' } );\n\t}\n\n\t/**\n\t * Marks model and view elements as corresponding. Corresponding elements can be retrieved by using\n\t * the {@link module:engine/conversion/mapper~Mapper#toModelElement toModelElement} and\n\t * {@link module:engine/conversion/mapper~Mapper#toViewElement toViewElement} methods.\n\t * The information that elements are bound is also used to translate positions.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element.\n\t * @param {module:engine/view/element~Element} viewElement View element.\n\t */\n\tbindElements( modelElement, viewElement ) {\n\t\tthis._modelToViewMapping.set( modelElement, viewElement );\n\t\tthis._viewToModelMapping.set( viewElement, modelElement );\n\t}\n\n\t/**\n\t * Unbinds given {@link module:engine/view/element~Element view element} from the map.\n\t *\n\t * **Note:** view-to-model binding will be removed, if it existed. However, corresponding model-to-view binding\n\t * will be removed only if model element is still bound to passed `viewElement`.\n\t *\n\t * This behavior lets for re-binding model element to another view element without fear of losing the new binding\n\t * when the previously bound view element is unbound.\n\t *\n\t * @param {module:engine/view/element~Element} viewElement View element to unbind.\n\t */\n\tunbindViewElement( viewElement ) {\n\t\tconst modelElement = this.toModelElement( viewElement );\n\n\t\tthis._viewToModelMapping.delete( viewElement );\n\n\t\tif ( this._elementToMarkerNames.has( viewElement ) ) {\n\t\t\tfor ( const markerName of this._elementToMarkerNames.get( viewElement ) ) {\n\t\t\t\tthis._unboundMarkerNames.add( markerName );\n\t\t\t}\n\t\t}\n\n\t\tif ( this._modelToViewMapping.get( modelElement ) == viewElement ) {\n\t\t\tthis._modelToViewMapping.delete( modelElement );\n\t\t}\n\t}\n\n\t/**\n\t * Unbinds given {@link module:engine/model/element~Element model element} from the map.\n\t *\n\t * **Note:** model-to-view binding will be removed, if it existed. However, corresponding view-to-model binding\n\t * will be removed only if view element is still bound to passed `modelElement`.\n\t *\n\t * This behavior lets for re-binding view element to another model element without fear of losing the new binding\n\t * when the previously bound model element is unbound.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element to unbind.\n\t */\n\tunbindModelElement( modelElement ) {\n\t\tconst viewElement = this.toViewElement( modelElement );\n\n\t\tthis._modelToViewMapping.delete( modelElement );\n\n\t\tif ( this._viewToModelMapping.get( viewElement ) == modelElement ) {\n\t\t\tthis._viewToModelMapping.delete( viewElement );\n\t\t}\n\t}\n\n\t/**\n\t * Binds given marker name with given {@link module:engine/view/element~Element view element}. The element\n\t * will be added to the current set of elements bound with given marker name.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to bind.\n\t * @param {String} name Marker name.\n\t */\n\tbindElementToMarker( element, name ) {\n\t\tconst elements = this._markerNameToElements.get( name ) || new Set();\n\t\telements.add( element );\n\n\t\tconst names = this._elementToMarkerNames.get( element ) || new Set();\n\t\tnames.add( name );\n\n\t\tthis._markerNameToElements.set( name, elements );\n\t\tthis._elementToMarkerNames.set( element, names );\n\t}\n\n\t/**\n\t * Unbinds an element from given marker name.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to unbind.\n\t * @param {String} name Marker name.\n\t */\n\tunbindElementFromMarkerName( element, name ) {\n\t\tconst nameToElements = this._markerNameToElements.get( name );\n\n\t\tif ( nameToElements ) {\n\t\t\tnameToElements.delete( element );\n\n\t\t\tif ( nameToElements.size == 0 ) {\n\t\t\t\tthis._markerNameToElements.delete( name );\n\t\t\t}\n\t\t}\n\n\t\tconst elementToNames = this._elementToMarkerNames.get( element );\n\n\t\tif ( elementToNames ) {\n\t\t\telementToNames.delete( name );\n\n\t\t\tif ( elementToNames.size == 0 ) {\n\t\t\t\tthis._elementToMarkerNames.delete( element );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns all marker names of markers which has changed due to unbinding a view element (so it is assumed that the view element\n\t * has been removed, moved or renamed) since the last flush. After returning, the marker names list is cleared.\n\t *\n\t * @returns {Array.<String>}\n\t */\n\tflushUnboundMarkerNames() {\n\t\tconst markerNames = Array.from( this._unboundMarkerNames );\n\n\t\tthis._unboundMarkerNames.clear();\n\n\t\treturn markerNames;\n\t}\n\n\t/**\n\t * Removes all model to view and view to model bindings.\n\t */\n\tclearBindings() {\n\t\tthis._modelToViewMapping = new WeakMap();\n\t\tthis._viewToModelMapping = new WeakMap();\n\t\tthis._markerNameToElements = new Map();\n\t\tthis._elementToMarkerNames = new Map();\n\t\tthis._unboundMarkerNames = new Set();\n\t}\n\n\t/**\n\t * Gets the corresponding model element.\n\t *\n\t * **Note:** {@link module:engine/view/uielement~UIElement} does not have corresponding element in model.\n\t *\n\t * @param {module:engine/view/element~Element} viewElement View element.\n\t * @returns {module:engine/model/element~Element|undefined} Corresponding model element or `undefined` if not found.\n\t */\n\ttoModelElement( viewElement ) {\n\t\treturn this._viewToModelMapping.get( viewElement );\n\t}\n\n\t/**\n\t * Gets the corresponding view element.\n\t *\n\t * @param {module:engine/model/element~Element} modelElement Model element.\n\t * @returns {module:engine/view/element~Element|undefined} Corresponding view element or `undefined` if not found.\n\t */\n\ttoViewElement( modelElement ) {\n\t\treturn this._modelToViewMapping.get( modelElement );\n\t}\n\n\t/**\n\t * Gets the corresponding model range.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {module:engine/model/range~Range} Corresponding model range.\n\t */\n\ttoModelRange( viewRange ) {\n\t\treturn new ModelRange( this.toModelPosition( viewRange.start ), this.toModelPosition( viewRange.end ) );\n\t}\n\n\t/**\n\t * Gets the corresponding view range.\n\t *\n\t * @param {module:engine/model/range~Range} modelRange Model range.\n\t * @returns {module:engine/view/range~Range} Corresponding view range.\n\t */\n\ttoViewRange( modelRange ) {\n\t\treturn new ViewRange( this.toViewPosition( modelRange.start ), this.toViewPosition( modelRange.end ) );\n\t}\n\n\t/**\n\t * Gets the corresponding model position.\n\t *\n\t * @fires viewToModelPosition\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {module:engine/model/position~Position} Corresponding model position.\n\t */\n\ttoModelPosition( viewPosition ) {\n\t\tconst data = {\n\t\t\tviewPosition,\n\t\t\tmapper: this\n\t\t};\n\n\t\tthis.fire( 'viewToModelPosition', data );\n\n\t\treturn data.modelPosition;\n\t}\n\n\t/**\n\t * Gets the corresponding view position.\n\t *\n\t * @fires modelToViewPosition\n\t * @param {module:engine/model/position~Position} modelPosition Model position.\n\t * @param {Object} [options] Additional options for position mapping process.\n\t * @param {Boolean} [options.isPhantom=false] Should be set to `true` if the model position to map is pointing to a place\n\t * in model tree which no longer exists. For example, it could be an end of a removed model range.\n\t * @returns {module:engine/view/position~Position} Corresponding view position.\n\t */\n\ttoViewPosition( modelPosition, options = { isPhantom: false } ) {\n\t\tconst data = {\n\t\t\tmodelPosition,\n\t\t\tmapper: this,\n\t\t\tisPhantom: options.isPhantom\n\t\t};\n\n\t\tthis.fire( 'modelToViewPosition', data );\n\n\t\treturn data.viewPosition;\n\t}\n\n\t/**\n\t * Gets all view elements bound to the given marker name.\n\t *\n\t * @param {String} name Marker name.\n\t * @returns {Set.<module:engine/view/element~Element>|null} View elements bound with given marker name or `null`\n\t * if no elements are bound to given marker name.\n\t */\n\tmarkerNameToElements( name ) {\n\t\tconst boundElements = this._markerNameToElements.get( name );\n\n\t\tif ( !boundElements ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst elements = new Set();\n\n\t\tfor ( const element of boundElements ) {\n\t\t\tif ( element.is( 'attributeElement' ) ) {\n\t\t\t\tfor ( const clone of element.getElementsWithSameId() ) {\n\t\t\t\t\telements.add( clone );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\telements.add( element );\n\t\t\t}\n\t\t}\n\n\t\treturn elements;\n\t}\n\n\t/**\n\t * Registers a callback that evaluates the length in the model of a view element with given name.\n\t *\n\t * The callback is fired with one argument, which is a view element instance. The callback is expected to return\n\t * a number representing the length of view element in model.\n\t *\n\t *\t\t// List item in view may contain nested list, which have other list items. In model though,\n\t *\t\t// the lists are represented by flat structure. Because of those differences, length of list view element\n\t *\t\t// may be greater than one. In the callback it's checked how many nested list items are in evaluated list item.\n\t *\n\t *\t\tfunction getViewListItemLength( element ) {\n\t *\t\t\tlet length = 1;\n\t *\n\t *\t\t\tfor ( let child of element.getChildren() ) {\n\t *\t\t\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t *\t\t\t\t\tfor ( let item of child.getChildren() ) {\n\t *\t\t\t\t\t\tlength += getViewListItemLength( item );\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\n\t *\t\t\treturn length;\n\t *\t\t}\n\t *\n\t *\t\tmapper.registerViewToModelLength( 'li', getViewListItemLength );\n\t *\n\t * @param {String} viewElementName Name of view element for which callback is registered.\n\t * @param {Function} lengthCallback Function return a length of view element instance in model.\n\t */\n\tregisterViewToModelLength( viewElementName, lengthCallback ) {\n\t\tthis._viewToModelLengthCallbacks.set( viewElementName, lengthCallback );\n\t}\n\n\t/**\n\t * For given `viewPosition`, finds and returns the closest ancestor of this position that has a mapping to\n\t * the model.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition Position for which mapped ancestor should be found.\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tfindMappedViewAncestor( viewPosition ) {\n\t\tlet parent = viewPosition.parent;\n\n\t\twhile ( !this._viewToModelMapping.has( parent ) ) {\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn parent;\n\t}\n\n\t/**\n\t * Calculates model offset based on the view position and the block element.\n\t *\n\t * Example:\n\t *\n\t *\t\t<p>foo<b>ba|r</b></p> // _toModelOffset( b, 2, p ) -> 5\n\t *\n\t * Is a sum of:\n\t *\n\t *\t\t<p>foo|<b>bar</b></p> // _toModelOffset( p, 3, p ) -> 3\n\t *\t\t<p>foo<b>ba|r</b></p> // _toModelOffset( b, 2, b ) -> 2\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewParent Position parent.\n\t * @param {Number} viewOffset Position offset.\n\t * @param {module:engine/view/element~Element} viewBlock Block used as a base to calculate offset.\n\t * @returns {Number} Offset in the model.\n\t */\n\t_toModelOffset( viewParent, viewOffset, viewBlock ) {\n\t\tif ( viewBlock != viewParent ) {\n\t\t\t// See example.\n\t\t\tconst offsetToParentStart = this._toModelOffset( viewParent.parent, viewParent.index, viewBlock );\n\t\t\tconst offsetInParent = this._toModelOffset( viewParent, viewOffset, viewParent );\n\n\t\t\treturn offsetToParentStart + offsetInParent;\n\t\t}\n\n\t\t// viewBlock == viewParent, so we need to calculate the offset in the parent element.\n\n\t\t// If the position is a text it is simple (\"ba|r\" -> 2).\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\treturn viewOffset;\n\t\t}\n\n\t\t// If the position is in an element we need to sum lengths of siblings ( <b> bar </b> foo | -> 3 + 3 = 6 ).\n\t\tlet modelOffset = 0;\n\n\t\tfor ( let i = 0; i < viewOffset; i++ ) {\n\t\t\tmodelOffset += this.getModelLength( viewParent.getChild( i ) );\n\t\t}\n\n\t\treturn modelOffset;\n\t}\n\n\t/**\n\t * Gets the length of the view element in the model.\n\t *\n\t * The length is calculated as follows:\n\t * * if {@link #registerViewToModelLength length mapping callback} is provided for given `viewNode` it is used to\n\t * evaluate model length (`viewNode` is used as first and only parameter passed to the callback),\n\t * * length of a {@link module:engine/view/text~Text text node} is equal to the length of it's\n\t * {@link module:engine/view/text~Text#data data},\n\t * * length of a {@link module:engine/view/uielement~UIElement ui element} is equal to 0,\n\t * * length of a mapped {@link module:engine/view/element~Element element} is equal to 1,\n\t * * length of a not-mapped {@link module:engine/view/element~Element element} is equal to the length of it's children.\n\t *\n\t * Examples:\n\t *\n\t *\t\tfoo -> 3 // Text length is equal to it's data length.\n\t *\t\t<p>foo</p> -> 1 // Length of an element which is mapped is by default equal to 1.\n\t *\t\t<b>foo</b> -> 3 // Length of an element which is not mapped is a length of its children.\n\t *\t\t<div><p>x</p><p>y</p></div> -> 2 // Assuming that <div> is not mapped and <p> are mapped.\n\t *\n\t * @param {module:engine/view/element~Element} viewNode View node.\n\t * @returns {Number} Length of the node in the tree model.\n\t */\n\tgetModelLength( viewNode ) {\n\t\tif ( this._viewToModelLengthCallbacks.get( viewNode.name ) ) {\n\t\t\tconst callback = this._viewToModelLengthCallbacks.get( viewNode.name );\n\n\t\t\treturn callback( viewNode );\n\t\t} else if ( this._viewToModelMapping.has( viewNode ) ) {\n\t\t\treturn 1;\n\t\t} else if ( viewNode.is( 'text' ) ) {\n\t\t\treturn viewNode.data.length;\n\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\treturn 0;\n\t\t} else {\n\t\t\tlet len = 0;\n\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tlen += this.getModelLength( child );\n\t\t\t}\n\n\t\t\treturn len;\n\t\t}\n\t}\n\n\t/**\n\t * Finds the position in the view node (or its children) with the expected model offset.\n\t *\n\t * Example:\n\t *\n\t *\t\t<p>fo<b>bar</b>bom</p> -> expected offset: 4\n\t *\n\t *\t\t_findPositionIn( p, 4 ):\n\t *\t\t<p>|fo<b>bar</b>bom</p> -> expected offset: 4, actual offset: 0\n\t *\t\t<p>fo|<b>bar</b>bom</p> -> expected offset: 4, actual offset: 2\n\t *\t\t<p>fo<b>bar</b>|bom</p> -> expected offset: 4, actual offset: 5 -> we are too far\n\t *\n\t *\t\t_findPositionIn( b, 4 - ( 5 - 3 ) ):\n\t *\t\t<p>fo<b>|bar</b>bom</p> -> expected offset: 2, actual offset: 0\n\t *\t\t<p>fo<b>bar|</b>bom</p> -> expected offset: 2, actual offset: 3 -> we are too far\n\t *\n\t *\t\t_findPositionIn( bar, 2 - ( 3 - 3 ) ):\n\t *\t\tWe are in the text node so we can simple find the offset.\n\t *\t\t<p>fo<b>ba|r</b>bom</p> -> expected offset: 2, actual offset: 2 -> position found\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewParent Tree view element in which we are looking for the position.\n\t * @param {Number} expectedOffset Expected offset.\n\t * @returns {module:engine/view/position~Position} Found position.\n\t */\n\t_findPositionIn( viewParent, expectedOffset ) {\n\t\t// Last scanned view node.\n\t\tlet viewNode;\n\t\t// Length of the last scanned view node.\n\t\tlet lastLength = 0;\n\n\t\tlet modelOffset = 0;\n\t\tlet viewOffset = 0;\n\n\t\t// In the text node it is simple: offset in the model equals offset in the text.\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\treturn new ViewPosition( viewParent, expectedOffset );\n\t\t}\n\n\t\t// In other cases we add lengths of child nodes to find the proper offset.\n\n\t\t// If it is smaller we add the length.\n\t\twhile ( modelOffset < expectedOffset ) {\n\t\t\tviewNode = viewParent.getChild( viewOffset );\n\t\t\tlastLength = this.getModelLength( viewNode );\n\t\t\tmodelOffset += lastLength;\n\t\t\tviewOffset++;\n\t\t}\n\n\t\t// If it equals we found the position.\n\t\tif ( modelOffset == expectedOffset ) {\n\t\t\treturn this._moveViewPositionToTextNode( new ViewPosition( viewParent, viewOffset ) );\n\t\t}\n\t\t// If it is higher we need to enter last child.\n\t\telse {\n\t\t\t// ( modelOffset - lastLength ) is the offset to the child we enter,\n\t\t\t// so we subtract it from the expected offset to fine the offset in the child.\n\t\t\treturn this._findPositionIn( viewNode, expectedOffset - ( modelOffset - lastLength ) );\n\t\t}\n\t}\n\n\t/**\n\t * Because we prefer positions in text nodes over positions next to text node moves view position to the text node\n\t * if it was next to it.\n\t *\n\t *\t\t<p>[]<b>foo</b></p> -> <p>[]<b>foo</b></p> // do not touch if position is not directly next to text\n\t *\t\t<p>foo[]<b>foo</b></p> -> <p>foo{}<b>foo</b></p> // move to text node\n\t *\t\t<p><b>[]foo</b></p> -> <p><b>{}foo</b></p> // move to text node\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} viewPosition Position potentially next to text node.\n\t * @returns {module:engine/view/position~Position} Position in text node if possible.\n\t */\n\t_moveViewPositionToTextNode( viewPosition ) {\n\t\t// If the position is just after text node, put it at the end of that text node.\n\t\t// If the position is just before text node, put it at the beginning of that text node.\n\t\tconst nodeBefore = viewPosition.nodeBefore;\n\t\tconst nodeAfter = viewPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText ) {\n\t\t\treturn new ViewPosition( nodeBefore, nodeBefore.data.length );\n\t\t} else if ( nodeAfter instanceof ViewText ) {\n\t\t\treturn new ViewPosition( nodeAfter, 0 );\n\t\t}\n\n\t\t// Otherwise, just return the given position.\n\t\treturn viewPosition;\n\t}\n\n\t/**\n\t * Fired for each model-to-view position mapping request. The purpose of this event is to enable custom model-to-view position\n\t * mapping. Callbacks added to this event take {@link module:engine/model/position~Position model position} and are expected to\n\t * calculate {@link module:engine/view/position~Position view position}. Calculated view position should be added as `viewPosition`\n\t * value in `data` object that is passed as one of parameters to the event callback.\n\t *\n\t * \t\t// Assume that \"captionedImage\" model element is converted to <img> and following <span> elements in view,\n\t * \t\t// and the model element is bound to <img> element. Force mapping model positions inside \"captionedImage\" to that\n\t * \t\t// <span> element.\n\t *\t\tmapper.on( 'modelToViewPosition', ( evt, data ) => {\n\t *\t\t\tconst positionParent = modelPosition.parent;\n\t *\n\t *\t\t\tif ( positionParent.name == 'captionedImage' ) {\n\t *\t\t\t\tconst viewImg = data.mapper.toViewElement( positionParent );\n\t *\t\t\t\tconst viewCaption = viewImg.nextSibling; // The <span> element.\n\t *\n\t *\t\t\t\tdata.viewPosition = new ViewPosition( viewCaption, modelPosition.offset );\n\t *\n\t *\t\t\t\t// Stop the event if other callbacks should not modify calculated value.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** keep in mind that sometimes a \"phantom\" model position is being converted. \"Phantom\" model position is\n\t * a position that points to a non-existing place in model. Such position might still be valid for conversion, though\n\t * (it would point to a correct place in view when converted). One example of such situation is when a range is\n\t * removed from model, there may be a need to map the range's end (which is no longer valid model position). To\n\t * handle such situation, check `data.isPhantom` flag:\n\t *\n\t * \t\t// Assume that there is \"customElement\" model element and whenever position is before it, we want to move it\n\t * \t\t// to the inside of the view element bound to \"customElement\".\n\t *\t\tmapper.on( 'modelToViewPosition', ( evt, data ) => {\n\t *\t\t\tif ( data.isPhantom ) {\n\t *\t\t\t\treturn;\n\t *\t\t\t}\n\t *\n\t *\t\t\t// Below line might crash for phantom position that does not exist in model.\n\t *\t\t\tconst sibling = data.modelPosition.nodeBefore;\n\t *\n\t *\t\t\t// Check if this is the element we are interested in.\n\t *\t\t\tif ( !sibling.is( 'customElement' ) ) {\n\t *\t\t\t\treturn;\n\t *\t\t\t}\n\t *\n\t *\t\t\tconst viewElement = data.mapper.toViewElement( sibling );\n\t *\n\t *\t\t\tdata.viewPosition = new ViewPosition( sibling, 0 );\n\t *\n\t *\t\t\tevt.stop();\n\t *\t\t} );\n\t *\n\t * **Note:** default mapping callback is provided with `low` priority setting and does not cancel the event, so it is possible to\n\t * attach a custom callback after default callback and also use `data.viewPosition` calculated by default callback\n\t * (for example to fix it).\n\t *\n\t * **Note:** default mapping callback will not fire if `data.viewPosition` is already set.\n\t *\n\t * **Note:** these callbacks are called **very often**. For efficiency reasons, it is advised to use them only when position\n\t * mapping between given model and view elements is unsolvable using just elements mapping and default algorithm. Also,\n\t * the condition that checks if special case scenario happened should be as simple as possible.\n\t *\n\t * @event modelToViewPosition\n\t * @param {Object} data Data pipeline object that can store and pass data between callbacks. The callback should add\n\t * `viewPosition` value to that object with calculated {@link module:engine/view/position~Position view position}.\n\t * @param {module:engine/conversion/mapper~Mapper} data.mapper Mapper instance that fired the event.\n\t */\n\n\t/**\n\t * Fired for each view-to-model position mapping request. See {@link module:engine/conversion/mapper~Mapper#event:modelToViewPosition}.\n\t *\n\t * \t\t// See example in `modelToViewPosition` event description.\n\t * \t\t// This custom mapping will map positions from <span> element next to <img> to the \"captionedImage\" element.\n\t *\t\tmapper.on( 'viewToModelPosition', ( evt, data ) => {\n\t *\t\t\tconst positionParent = viewPosition.parent;\n\t *\n\t *\t\t\tif ( positionParent.hasClass( 'image-caption' ) ) {\n\t *\t\t\t\tconst viewImg = positionParent.previousSibling;\n\t *\t\t\t\tconst modelImg = data.mapper.toModelElement( viewImg );\n\t *\n\t *\t\t\t\tdata.modelPosition = new ModelPosition( modelImg, viewPosition.offset );\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** default mapping callback is provided with `low` priority setting and does not cancel the event, so it is possible to\n\t * attach a custom callback after default callback and also use `data.modelPosition` calculated by default callback\n\t * (for example to fix it).\n\t *\n\t * **Note:** default mapping callback will not fire if `data.modelPosition` is already set.\n\t *\n\t * **Note:** these callbacks are called **very often**. For efficiency reasons, it is advised to use them only when position\n\t * mapping between given model and view elements is unsolvable using just elements mapping and default algorithm. Also,\n\t * the condition that checks if special case scenario happened should be as simple as possible.\n\t *\n\t * @event viewToModelPosition\n\t * @param {Object} data Data pipeline object that can store and pass data between callbacks. The callback should add\n\t * `modelPosition` value to that object with calculated {@link module:engine/model/position~Position model position}.\n\t * @param {module:engine/conversion/mapper~Mapper} data.mapper Mapper instance that fired the event.\n\t */\n}\n\nmix( Mapper, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/modelconsumable\n */\n\nimport TextProxy from '../model/textproxy';\n\n/**\n * Manages a list of consumable values for {@link module:engine/model/item~Item model items}.\n *\n * Consumables are various aspects of the model. A model item can be broken down into singular properties that might be\n * taken into consideration when converting that item.\n *\n * `ModelConsumable` is used by {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} while analyzing changed\n * parts of {@link module:engine/model/document~Document the document}. The added / changed / removed model items are broken down\n * into singular properties (the item itself and it's attributes). All those parts are saved in `ModelConsumable`. Then,\n * during conversion, when given part of model item is converted (i.e. the view element has been inserted into the view,\n * but without attributes), consumable value is removed from `ModelConsumable`.\n *\n * For model items, `ModelConsumable` stores consumable values of one of following types: `insert`, `addattribute:<attributeKey>`,\n * `changeattributes:<attributeKey>`, `removeattributes:<attributeKey>`.\n *\n * In most cases, it is enough to let {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n * gather consumable values, so there is no need to use\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#add add method} directly.\n * However, it is important to understand how consumable values can be\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed}.\n * See {@link module:engine/conversion/downcasthelpers default downcast converters} for more information.\n *\n * Keep in mind, that one conversion event may have multiple callbacks (converters) attached to it. Each of those is\n * able to convert one or more parts of the model. However, when one of those callbacks actually converts\n * something, other should not, because they would duplicate the results. Using `ModelConsumable` helps avoiding\n * this situation, because callbacks should only convert those values, which were not yet consumed from `ModelConsumable`.\n *\n * Consuming multiple values in a single callback:\n *\n *\t\t// Converter for custom `image` element that might have a `caption` element inside which changes\n *\t\t// how the image is displayed in the view:\n *\t\t//\n *\t\t// Model:\n *\t\t//\n *\t\t// [image]\n *\t\t// └─ [caption]\n *\t\t// └─ foo\n *\t\t//\n *\t\t// View:\n *\t\t//\n *\t\t// <figure>\n *\t\t// ├─ <img />\n *\t\t// └─ <caption>\n *\t\t// └─ foo\n *\t\tmodelConversionDispatcher.on( 'insert:image', ( evt, data, conversionApi ) => {\n *\t\t\t// First, consume the `image` element.\n *\t\t\tconversionApi.consumable.consume( data.item, 'insert' );\n *\n *\t\t\t// Just create normal image element for the view.\n *\t\t\t// Maybe it will be \"decorated\" later.\n *\t\t\tconst viewImage = new ViewElement( 'img' );\n *\t\t\tconst insertPosition = conversionApi.mapper.toViewPosition( data.range.start );\n *\t\t\tconst viewWriter = conversionApi.writer;\n *\n *\t\t\t// Check if the `image` element has children.\n *\t\t\tif ( data.item.childCount > 0 ) {\n *\t\t\t\tconst modelCaption = data.item.getChild( 0 );\n *\n *\t\t\t\t// `modelCaption` insertion change is consumed from consumable values.\n *\t\t\t\t// It will not be converted by other converters, but it's children (probably some text) will be.\n *\t\t\t\t// Through mapping, converters for text will know where to insert contents of `modelCaption`.\n *\t\t\t\tif ( conversionApi.consumable.consume( modelCaption, 'insert' ) ) {\n *\t\t\t\t\tconst viewCaption = new ViewElement( 'figcaption' );\n *\n *\t\t\t\t\tconst viewImageHolder = new ViewElement( 'figure', null, [ viewImage, viewCaption ] );\n *\n *\t\t\t\t\tconversionApi.mapper.bindElements( modelCaption, viewCaption );\n *\t\t\t\t\tconversionApi.mapper.bindElements( data.item, viewImageHolder );\n *\t\t\t\t\tviewWriter.insert( insertPosition, viewImageHolder );\n *\t\t\t\t}\n *\t\t\t} else {\n *\t\t\t\tconversionApi.mapper.bindElements( data.item, viewImage );\n *\t\t\t\tviewWriter.insert( insertPosition, viewImage );\n *\t\t\t}\n *\n *\t\t\tevt.stop();\n *\t\t} );\n */\nexport default class ModelConsumable {\n\t/**\n\t * Creates an empty consumables list.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Contains list of consumable values.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/conversion/modelconsumable~ModelConsumable#_consumable\n\t\t */\n\t\tthis._consumable = new Map();\n\n\t\t/**\n\t\t * For each {@link module:engine/model/textproxy~TextProxy} added to `ModelConsumable`, this registry holds parent\n\t\t * of that `TextProxy` and start and end indices of that `TextProxy`. This allows identification of `TextProxy`\n\t\t * instances that points to the same part of the model but are different instances. Each distinct `TextProxy`\n\t\t * is given unique `Symbol` which is then registered as consumable. This process is transparent for `ModelConsumable`\n\t\t * API user because whenever `TextProxy` is added, tested, consumed or reverted, internal mechanisms of\n\t\t * `ModelConsumable` translates `TextProxy` to that unique `Symbol`.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/conversion/modelconsumable~ModelConsumable#_textProxyRegistry\n\t\t */\n\t\tthis._textProxyRegistry = new Map();\n\t}\n\n\t/**\n\t * Adds a consumable value to the consumables list and links it with given model item.\n\t *\n\t *\t\tmodelConsumable.add( modelElement, 'insert' ); // Add `modelElement` insertion change to consumable values.\n\t *\t\tmodelConsumable.add( modelElement, 'addAttribute:bold' ); // Add `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.add( modelElement, 'removeAttribute:bold' ); // Add `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.add( modelSelection, 'selection' ); // Add `modelSelection` to consumable values.\n\t *\t\tmodelConsumable.add( modelRange, 'range' ); // Add `modelRange` to consumable values.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection that has the consumable.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t */\n\tadd( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tif ( !this._consumable.has( item ) ) {\n\t\t\tthis._consumable.set( item, new Map() );\n\t\t}\n\n\t\tthis._consumable.get( item ).set( type, true );\n\t}\n\n\t/**\n\t * Removes given consumable value from given model item.\n\t *\n\t *\t\tmodelConsumable.consume( modelElement, 'insert' ); // Remove `modelElement` insertion change from consumable values.\n\t *\t\tmodelConsumable.consume( modelElement, 'addAttribute:bold' ); // Remove `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.consume( modelElement, 'removeAttribute:bold' ); // Remove `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.consume( modelSelection, 'selection' ); // Remove `modelSelection` from consumable values.\n\t *\t\tmodelConsumable.consume( modelRange, 'range' ); // Remove 'modelRange' from consumable values.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection from which consumable will be consumed.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t * @returns {Boolean} `true` if consumable value was available and was consumed, `false` otherwise.\n\t */\n\tconsume( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tif ( this.test( item, type ) ) {\n\t\t\tthis._consumable.get( item ).set( type, false );\n\n\t\t\treturn true;\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Tests whether there is a consumable value of given type connected with given model item.\n\t *\n\t *\t\tmodelConsumable.test( modelElement, 'insert' ); // Check for `modelElement` insertion change.\n\t *\t\tmodelConsumable.test( modelElement, 'addAttribute:bold' ); // Check for `bold` attribute insertion on `modelElement` change.\n\t *\t\tmodelConsumable.test( modelElement, 'removeAttribute:bold' ); // Check for `bold` attribute removal on `modelElement` change.\n\t *\t\tmodelConsumable.test( modelSelection, 'selection' ); // Check if `modelSelection` is consumable.\n\t *\t\tmodelConsumable.test( modelRange, 'range' ); // Check if `modelRange` is consumable.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection to be tested.\n\t * @param {String} type Consumable type. Will be normalized to a proper form, that is either `<word>` or `<part>:<part>`.\n\t * Second colon and everything after will be cut. Passing event name is a safe and good practice.\n\t * @returns {null|Boolean} `null` if such consumable was never added, `false` if the consumable values was\n\t * already consumed or `true` if it was added and not consumed yet.\n\t */\n\ttest( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tconst itemConsumables = this._consumable.get( item );\n\n\t\tif ( itemConsumables === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst value = itemConsumables.get( type );\n\n\t\tif ( value === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn value;\n\t}\n\n\t/**\n\t * Reverts consuming of consumable value.\n\t *\n\t *\t\tmodelConsumable.revert( modelElement, 'insert' ); // Revert consuming `modelElement` insertion change.\n\t *\t\tmodelConsumable.revert( modelElement, 'addAttribute:bold' ); // Revert consuming `bold` attribute insert from `modelElement`.\n\t *\t\tmodelConsumable.revert( modelElement, 'removeAttribute:bold' ); // Revert consuming `bold` attribute remove from `modelElement`.\n\t *\t\tmodelConsumable.revert( modelSelection, 'selection' ); // Revert consuming `modelSelection`.\n\t *\t\tmodelConsumable.revert( modelRange, 'range' ); // Revert consuming `modelRange`.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection|module:engine/model/range~Range} item\n\t * Model item, range or selection to be reverted.\n\t * @param {String} type Consumable type.\n\t * @returns {null|Boolean} `true` if consumable has been reversed, `false` otherwise. `null` if the consumable has\n\t * never been added.\n\t */\n\trevert( item, type ) {\n\t\ttype = _normalizeConsumableType( type );\n\n\t\tif ( item instanceof TextProxy ) {\n\t\t\titem = this._getSymbolForTextProxy( item );\n\t\t}\n\n\t\tconst test = this.test( item, type );\n\n\t\tif ( test === false ) {\n\t\t\tthis._consumable.get( item ).set( type, true );\n\n\t\t\treturn true;\n\t\t} else if ( test === true ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Gets a unique symbol for passed {@link module:engine/model/textproxy~TextProxy} instance. All `TextProxy` instances that\n\t * have same parent, same start index and same end index will get the same symbol.\n\t *\n\t * Used internally to correctly consume `TextProxy` instances.\n\t *\n\t * @private\n\t * @param {module:engine/model/textproxy~TextProxy} textProxy `TextProxy` instance to get a symbol for.\n\t * @returns {Symbol} Symbol representing all equal instances of `TextProxy`.\n\t */\n\t_getSymbolForTextProxy( textProxy ) {\n\t\tlet symbol = null;\n\n\t\tconst startMap = this._textProxyRegistry.get( textProxy.startOffset );\n\n\t\tif ( startMap ) {\n\t\t\tconst endMap = startMap.get( textProxy.endOffset );\n\n\t\t\tif ( endMap ) {\n\t\t\t\tsymbol = endMap.get( textProxy.parent );\n\t\t\t}\n\t\t}\n\n\t\tif ( !symbol ) {\n\t\t\tsymbol = this._addSymbolForTextProxy( textProxy.startOffset, textProxy.endOffset, textProxy.parent );\n\t\t}\n\n\t\treturn symbol;\n\t}\n\n\t/**\n\t * Adds a symbol for given properties that characterizes a {@link module:engine/model/textproxy~TextProxy} instance.\n\t *\n\t * Used internally to correctly consume `TextProxy` instances.\n\t *\n\t * @private\n\t * @param {Number} startIndex Text proxy start index in it's parent.\n\t * @param {Number} endIndex Text proxy end index in it's parent.\n\t * @param {module:engine/model/element~Element} parent Text proxy parent.\n\t * @returns {Symbol} Symbol generated for given properties.\n\t */\n\t_addSymbolForTextProxy( start, end, parent ) {\n\t\tconst symbol = Symbol( 'textProxySymbol' );\n\t\tlet startMap, endMap;\n\n\t\tstartMap = this._textProxyRegistry.get( start );\n\n\t\tif ( !startMap ) {\n\t\t\tstartMap = new Map();\n\t\t\tthis._textProxyRegistry.set( start, startMap );\n\t\t}\n\n\t\tendMap = startMap.get( end );\n\n\t\tif ( !endMap ) {\n\t\t\tendMap = new Map();\n\t\t\tstartMap.set( end, endMap );\n\t\t}\n\n\t\tendMap.set( parent, symbol );\n\n\t\treturn symbol;\n\t}\n}\n\n// Returns a normalized consumable type name from given string. A normalized consumable type name is a string that has\n// at most one colon, for example: `insert` or `addMarker:highlight`. If string to normalize has more \"parts\" (more colons),\n// the other parts are dropped, for example: `addattribute:bold:$text` -> `addattributes:bold`.\n//\n// @param {String} type Consumable type.\n// @returns {String} Normalized consumable type.\nfunction _normalizeConsumableType( type ) {\n\tconst parts = type.split( ':' );\n\n\treturn parts.length > 1 ? parts[ 0 ] + ':' + parts[ 1 ] : parts[ 0 ];\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/downcastdispatcher\n */\n\nimport Consumable from './modelconsumable';\nimport Range from '../model/range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { extend } from 'lodash-es';\n\n/**\n * `DowncastDispatcher` is a central point of downcasting (conversion from model to view), which is a process of reacting to changes\n * in the model and firing a set of events. Callbacks listening to those events are called converters. Those\n * converters role is to convert the model changes to changes in view (for example, adding view nodes or\n * changing attributes on view elements).\n *\n * During conversion process, `DowncastDispatcher` fires events, basing on state of the model and prepares\n * data for those events. It is important to understand that those events are connected with changes done on model,\n * for example: \"node has been inserted\" or \"attribute has changed\". This is in a contrary to upcasting (view to model conversion),\n * where we convert view state (view nodes) to a model tree.\n *\n * The events are prepared basing on a diff created by {@link module:engine/model/differ~Differ Differ}, which buffers them\n * and then passes to `DowncastDispatcher` as a diff between old model state and new model state.\n *\n * Note, that because changes are converted there is a need to have a mapping between model structure and view structure.\n * To map positions and elements during downcast (model to view conversion) use {@link module:engine/conversion/mapper~Mapper}.\n *\n * `DowncastDispatcher` fires following events for model tree changes:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert insert}\n * if a range of nodes has been inserted to the model tree,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove remove}\n * if a range of nodes has been removed from the model tree,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute attribute}\n * if attribute has been added, changed or removed from a model node.\n *\n * For {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert insert}\n * and {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute attribute},\n * `DowncastDispatcher` generates {@link module:engine/conversion/modelconsumable~ModelConsumable consumables}.\n * These are used to have a control over which changes has been already consumed. It is useful when some converters\n * overwrite other or converts multiple changes (for example converts insertion of an element and also converts that\n * element's attributes during insertion).\n *\n * Additionally, `DowncastDispatcher` fires events for {@link module:engine/model/markercollection~Marker marker} changes:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker} if a marker has been added,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:removeMarker} if a marker has been removed.\n *\n * Note, that changing a marker is done through removing the marker from the old range, and adding on the new range,\n * so both those events are fired.\n *\n * Finally, `DowncastDispatcher` also handles firing events for {@link module:engine/model/selection model selection}\n * conversion:\n *\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:selection}\n * which converts selection from model to view,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute}\n * which is fired for every selection attribute,\n * * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}\n * which is fired for every marker which contains selection.\n *\n * Unlike model tree and markers, events for selection are not fired for changes but for selection state.\n *\n * When providing custom listeners for `DowncastDispatcher` remember to check whether given change has not been\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed} yet.\n *\n * When providing custom listeners for `DowncastDispatcher` keep in mind that any callback that had\n * {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed} a value from a consumable and\n * converted the change should also stop the event (for efficiency purposes).\n *\n * When providing custom listeners for `DowncastDispatcher` remember to use provided\n * {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer} to apply changes to the view document.\n *\n * Example of a custom converter for `DowncastDispatcher`:\n *\n *\t\t// We will convert inserting \"paragraph\" model element into the model.\n *\t\tdowncastDispatcher.on( 'insert:paragraph', ( evt, data, conversionApi ) => {\n *\t\t\t// Remember to check whether the change has not been consumed yet and consume it.\n *\t\t\tif ( conversionApi.consumable.consume( data.item, 'insert' ) ) {\n *\t\t\t\treturn;\n *\t\t\t}\n *\n *\t\t\t// Translate position in model to position in view.\n *\t\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n *\n *\t\t\t// Create <p> element that will be inserted in view at `viewPosition`.\n *\t\t\tconst viewElement = conversionApi.writer.createContainerElement( 'p' );\n *\n *\t\t\t// Bind the newly created view element to model element so positions will map accordingly in future.\n *\t\t\tconversionApi.mapper.bindElements( data.item, viewElement );\n *\n *\t\t\t// Add the newly created view element to the view.\n *\t\t\tconversionApi.writer.insert( viewPosition, viewElement );\n *\n *\t\t\t// Remember to stop the event propagation.\n *\t\t\tevt.stop();\n *\t\t} );\n */\nexport default class DowncastDispatcher {\n\t/**\n\t * Creates a `DowncastDispatcher` instance.\n\t *\n\t * @see module:engine/conversion/downcastdispatcher~DowncastConversionApi\n\t * @param {Object} conversionApi Additional properties for interface that will be passed to events fired\n\t * by `DowncastDispatcher`.\n\t */\n\tconstructor( conversionApi ) {\n\t\t/**\n\t\t * Interface passed by dispatcher to the events callbacks.\n\t\t *\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastConversionApi}\n\t\t */\n\t\tthis.conversionApi = extend( { dispatcher: this }, conversionApi );\n\t}\n\n\t/**\n\t * Takes {@link module:engine/model/differ~Differ model differ} object with buffered changes and fires conversion basing on it.\n\t *\n\t * @param {module:engine/model/differ~Differ} differ Differ object with buffered changes.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Markers connected with converted model.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertChanges( differ, markers, writer ) {\n\t\t// Before the view is updated, remove markers which have changed.\n\t\tfor ( const change of differ.getMarkersToRemove() ) {\n\t\t\tthis.convertMarkerRemove( change.name, change.range, writer );\n\t\t}\n\n\t\t// Convert changes that happened on model tree.\n\t\tfor ( const entry of differ.getChanges() ) {\n\t\t\tif ( entry.type == 'insert' ) {\n\t\t\t\tthis.convertInsert( Range._createFromPositionAndShift( entry.position, entry.length ), writer );\n\t\t\t} else if ( entry.type == 'remove' ) {\n\t\t\t\tthis.convertRemove( entry.position, entry.length, entry.name, writer );\n\t\t\t} else {\n\t\t\t\t// entry.type == 'attribute'.\n\t\t\t\tthis.convertAttribute( entry.range, entry.attributeKey, entry.attributeOldValue, entry.attributeNewValue, writer );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const markerName of this.conversionApi.mapper.flushUnboundMarkerNames() ) {\n\t\t\tconst markerRange = markers.get( markerName ).getRange();\n\n\t\t\tthis.convertMarkerRemove( markerName, markerRange, writer );\n\t\t\tthis.convertMarkerAdd( markerName, markerRange, writer );\n\t\t}\n\n\t\t// After the view is updated, convert markers which have changed.\n\t\tfor ( const change of differ.getMarkersToAdd() ) {\n\t\t\tthis.convertMarkerAdd( change.name, change.range, writer );\n\t\t}\n\t}\n\n\t/**\n\t * Starts conversion of a range insertion.\n\t *\n\t * For each node in the range, {@link #event:insert insert event is fired}. For each attribute on each node,\n\t * {@link #event:attribute attribute event is fired}.\n\t *\n\t * @fires insert\n\t * @fires attribute\n\t * @param {module:engine/model/range~Range} range Inserted range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertInsert( range, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create a list of things that can be consumed, consisting of nodes and their attributes.\n\t\tthis.conversionApi.consumable = this._createInsertConsumable( range );\n\n\t\t// Fire a separate insert event for each node and text fragment contained in the range.\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\t\t\tconst itemRange = Range._createFromPositionAndShift( value.previousPosition, value.length );\n\t\t\tconst data = {\n\t\t\t\titem,\n\t\t\t\trange: itemRange\n\t\t\t};\n\n\t\t\tthis._testAndFire( 'insert', data );\n\n\t\t\t// Fire a separate addAttribute event for each attribute that was set on inserted items.\n\t\t\t// This is important because most attributes converters will listen only to add/change/removeAttribute events.\n\t\t\t// If we would not add this part, attributes on inserted nodes would not be converted.\n\t\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\t\tdata.attributeKey = key;\n\t\t\t\tdata.attributeOldValue = null;\n\t\t\t\tdata.attributeNewValue = item.getAttribute( key );\n\n\t\t\t\tthis._testAndFire( `attribute:${ key }`, data );\n\t\t\t}\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Fires conversion of a single node removal. Fires {@link #event:remove remove event} with provided data.\n\t *\n\t * @param {module:engine/model/position~Position} position Position from which node was removed.\n\t * @param {Number} length Offset size of removed node.\n\t * @param {String} name Name of removed node.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertRemove( position, length, name, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\tthis.fire( 'remove:' + name, { position, length }, this.conversionApi );\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Starts conversion of attribute change on given `range`.\n\t *\n\t * For each node in the given `range`, {@link #event:attribute attribute event} is fired with the passed data.\n\t *\n\t * @fires attribute\n\t * @param {module:engine/model/range~Range} range Changed range.\n\t * @param {String} key Key of the attribute that has changed.\n\t * @param {*} oldValue Attribute value before the change or `null` if the attribute has not been set before.\n\t * @param {*} newValue New attribute value or `null` if the attribute has been removed.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertAttribute( range, key, oldValue, newValue, writer ) {\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create a list with attributes to consume.\n\t\tthis.conversionApi.consumable = this._createConsumableForRange( range, `attribute:${ key }` );\n\n\t\t// Create a separate attribute event for each node in the range.\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\t\t\tconst itemRange = Range._createFromPositionAndShift( value.previousPosition, value.length );\n\t\t\tconst data = {\n\t\t\t\titem,\n\t\t\t\trange: itemRange,\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: oldValue,\n\t\t\t\tattributeNewValue: newValue\n\t\t\t};\n\n\t\t\tthis._testAndFire( `attribute:${ key }`, data );\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Starts model selection conversion.\n\t *\n\t * Fires events for given {@link module:engine/model/selection~Selection selection} to start selection conversion.\n\t *\n\t * @fires selection\n\t * @fires addMarker\n\t * @fires attribute\n\t * @param {module:engine/model/selection~Selection} selection Selection to convert.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Markers connected with converted model.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertSelection( selection, markers, writer ) {\n\t\tconst markersAtSelection = Array.from( markers.getMarkersAtPosition( selection.getFirstPosition() ) );\n\n\t\tthis.conversionApi.writer = writer;\n\t\tthis.conversionApi.consumable = this._createSelectionConsumable( selection, markersAtSelection );\n\n\t\tthis.fire( 'selection', { selection }, this.conversionApi );\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const marker of markersAtSelection ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tif ( !shouldMarkerChangeBeConverted( selection.getFirstPosition(), marker, this.conversionApi.mapper ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst data = {\n\t\t\t\titem: selection,\n\t\t\t\tmarkerName: marker.name,\n\t\t\t\tmarkerRange\n\t\t\t};\n\n\t\t\tif ( this.conversionApi.consumable.test( selection, 'addMarker:' + marker.name ) ) {\n\t\t\t\tthis.fire( 'addMarker:' + marker.name, data, this.conversionApi );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of selection.getAttributeKeys() ) {\n\t\t\tconst data = {\n\t\t\t\titem: selection,\n\t\t\t\trange: selection.getFirstRange(),\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: null,\n\t\t\t\tattributeNewValue: selection.getAttribute( key )\n\t\t\t};\n\n\t\t\t// Do not fire event if the attribute has been consumed.\n\t\t\tif ( this.conversionApi.consumable.test( selection, 'attribute:' + data.attributeKey ) ) {\n\t\t\t\tthis.fire( 'attribute:' + data.attributeKey + ':$text', data, this.conversionApi );\n\t\t\t}\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Converts added marker. Fires {@link #event:addMarker addMarker} event for each item\n\t * in marker's range. If range is collapsed single event is dispatched. See event description for more details.\n\t *\n\t * @fires addMarker\n\t * @param {String} markerName Marker name.\n\t * @param {module:engine/model/range~Range} markerRange Marker range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertMarkerAdd( markerName, markerRange, writer ) {\n\t\t// Do not convert if range is in graveyard or not in the document (e.g. in DocumentFragment).\n\t\tif ( !markerRange.root.document || markerRange.root.rootName == '$graveyard' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// In markers' case, event name == consumable name.\n\t\tconst eventName = 'addMarker:' + markerName;\n\n\t\t//\n\t\t// First, fire an event for the whole marker.\n\t\t//\n\t\tconst consumable = new Consumable();\n\t\tconsumable.add( markerRange, eventName );\n\n\t\tthis.conversionApi.consumable = consumable;\n\n\t\tthis.fire( eventName, { markerName, markerRange }, this.conversionApi );\n\n\t\t//\n\t\t// Do not fire events for each item inside the range if the range got consumed.\n\t\t//\n\t\tif ( !consumable.test( markerRange, eventName ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t//\n\t\t// Then, fire an event for each item inside the marker range.\n\t\t//\n\t\tthis.conversionApi.consumable = this._createConsumableForRange( markerRange, eventName );\n\n\t\tfor ( const item of markerRange.getItems() ) {\n\t\t\t// Do not fire event for already consumed items.\n\t\t\tif ( !this.conversionApi.consumable.test( item, eventName ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst data = { item, range: Range._createOn( item ), markerName, markerRange };\n\n\t\t\tthis.fire( eventName, data, this.conversionApi );\n\t\t}\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Fires conversion of marker removal. Fires {@link #event:removeMarker removeMarker} event with provided data.\n\t *\n\t * @fires removeMarker\n\t * @param {String} markerName Marker name.\n\t * @param {module:engine/model/range~Range} markerRange Marker range.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that should be used to modify view document.\n\t */\n\tconvertMarkerRemove( markerName, markerRange, writer ) {\n\t\t// Do not convert if range is in graveyard or not in the document (e.g. in DocumentFragment).\n\t\tif ( !markerRange.root.document || markerRange.root.rootName == '$graveyard' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.conversionApi.writer = writer;\n\n\t\tthis.fire( 'removeMarker:' + markerName, { markerName, markerRange }, this.conversionApi );\n\n\t\tthis._clearConversionApi();\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with values to consume from given range,\n\t * assuming that the range has just been inserted to the model.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Inserted range.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createInsertConsumable( range ) {\n\t\tconst consumable = new Consumable();\n\n\t\tfor ( const value of range ) {\n\t\t\tconst item = value.item;\n\n\t\t\tconsumable.add( item, 'insert' );\n\n\t\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\t\tconsumable.add( item, 'attribute:' + key );\n\t\t\t}\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with values to consume for given range.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Affected range.\n\t * @param {String} type Consumable type.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createConsumableForRange( range, type ) {\n\t\tconst consumable = new Consumable();\n\n\t\tfor ( const item of range.getItems() ) {\n\t\t\tconsumable.add( item, type );\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/modelconsumable~ModelConsumable} with selection consumable values.\n\t *\n\t * @private\n\t * @param {module:engine/model/selection~Selection} selection Selection to create consumable from.\n\t * @param {Iterable.<module:engine/model/markercollection~Marker>} markers Markers which contains selection.\n\t * @returns {module:engine/conversion/modelconsumable~ModelConsumable} Values to consume.\n\t */\n\t_createSelectionConsumable( selection, markers ) {\n\t\tconst consumable = new Consumable();\n\n\t\tconsumable.add( selection, 'selection' );\n\n\t\tfor ( const marker of markers ) {\n\t\t\tconsumable.add( selection, 'addMarker:' + marker.name );\n\t\t}\n\n\t\tfor ( const key of selection.getAttributeKeys() ) {\n\t\t\tconsumable.add( selection, 'attribute:' + key );\n\t\t}\n\n\t\treturn consumable;\n\t}\n\n\t/**\n\t * Tests passed `consumable` to check whether given event can be fired and if so, fires it.\n\t *\n\t * @private\n\t * @fires insert\n\t * @fires attribute\n\t * @param {String} type Event type.\n\t * @param {Object} data Event data.\n\t */\n\t_testAndFire( type, data ) {\n\t\tif ( !this.conversionApi.consumable.test( data.item, type ) ) {\n\t\t\t// Do not fire event if the item was consumed.\n\t\t\treturn;\n\t\t}\n\n\t\tconst name = data.item.name || '$text';\n\n\t\tthis.fire( type + ':' + name, data, this.conversionApi );\n\t}\n\n\t/**\n\t * Clears conversion API object.\n\t *\n\t * @private\n\t */\n\t_clearConversionApi() {\n\t\tdelete this.conversionApi.writer;\n\t\tdelete this.conversionApi.consumable;\n\t}\n\n\t/**\n\t * Fired for inserted nodes.\n\t *\n\t * `insert` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `insert:name`. `name` is either `'$text'`, when {@link module:engine/model/text~Text a text node} has been inserted,\n\t * or {@link module:engine/model/element~Element#name name} of inserted element.\n\t *\n\t * This way listeners can either listen to a general `insert` event or specific event (for example `insert:paragraph`).\n\t *\n\t * @event insert\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item} data.item Inserted item.\n\t * @param {module:engine/model/range~Range} data.range Range spanning over inserted item.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired for removed nodes.\n\t *\n\t * `remove` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `remove:name`. `name` is either `'$text'`, when {@link module:engine/model/text~Text a text node} has been removed,\n\t * or the {@link module:engine/model/element~Element#name name} of removed element.\n\t *\n\t * This way listeners can either listen to a general `remove` event or specific event (for example `remove:paragraph`).\n\t *\n\t * @event remove\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/position~Position} data.position Position from which the node has been removed.\n\t * @param {Number} data.length Offset size of the removed node.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired in the following cases:\n\t *\n\t * * when an attribute has been added, changed, or removed from a node,\n\t * * when a node with an attribute is inserted,\n\t * * when collapsed model selection attribute is converted.\n\t *\n\t * `attribute` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `attribute:attributeKey:name`. `attributeKey` is the key of added/changed/removed attribute.\n\t * `name` is either `'$text'` if change was on {@link module:engine/model/text~Text a text node},\n\t * or the {@link module:engine/model/element~Element#name name} of element which attribute has changed.\n\t *\n\t * This way listeners can either listen to a general `attribute:bold` event or specific event (for example `attribute:src:image`).\n\t *\n\t * @event attribute\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item|module:engine/model/documentselection~DocumentSelection} data.item Changed item\n\t * or converted selection.\n\t * @param {module:engine/model/range~Range} data.range Range spanning over changed item or selection range.\n\t * @param {String} data.attributeKey Attribute key.\n\t * @param {*} data.attributeOldValue Attribute value before the change. This is `null` when selection attribute is converted.\n\t * @param {*} data.attributeNewValue New attribute value.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired for {@link module:engine/model/selection~Selection selection} changes.\n\t *\n\t * @event selection\n\t * @param {module:engine/model/selection~Selection} selection Selection that is converted.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired when a new marker is added to the model. Also fired when collapsed model selection that is inside marker is converted.\n\t *\n\t * `addMarker` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `addMarker:markerName`. By specifying certain marker names, you can make the events even more gradual. For example,\n\t * if markers are named `foo:abc`, `foo:bar`, then it is possible to listen to `addMarker:foo` or `addMarker:foo:abc` and\n\t * `addMarker:foo:bar` events.\n\t *\n\t * If the marker range is not collapsed:\n\t *\n\t * * the event is fired for each item in the marker range one by one,\n\t * * `conversionApi.consumable` includes each item of the marker range and the consumable value is same as event name.\n\t *\n\t * If the marker range is collapsed:\n\t *\n\t * * there is only one event,\n\t * * `conversionApi.consumable` includes marker range with event name.\n\t *\n\t * If selection inside a marker is converted:\n\t *\n\t * * there is only one event,\n\t * * `conversionApi.consumable` includes selection instance with event name.\n\t *\n\t * @event addMarker\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/item~Item|module:engine/model/selection~Selection} data.item Item inside the new marker or\n\t * the selection that is being converted.\n\t * @param {module:engine/model/range~Range} [data.range] Range spanning over converted item. Available only in marker conversion, if\n\t * the marker range was not collapsed.\n\t * @param {module:engine/model/range~Range} data.markerRange Marker range.\n\t * @param {String} data.markerName Marker name.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n\n\t/**\n\t * Fired when marker is removed from the model.\n\t *\n\t * `removeMarker` is a namespace for a class of events. Names of actually called events follow this pattern:\n\t * `removeMarker:markerName`. By specifying certain marker names, you can make the events even more gradual. For example,\n\t * if markers are named `foo:abc`, `foo:bar`, then it is possible to listen to `removeMarker:foo` or `removeMarker:foo:abc` and\n\t * `removeMarker:foo:bar` events.\n\t *\n\t * @event removeMarker\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/model/range~Range} data.markerRange Marker range.\n\t * @param {String} data.markerName Marker name.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface\n\t * to be used by callback, passed in `DowncastDispatcher` constructor.\n\t */\n}\n\nmix( DowncastDispatcher, EmitterMixin );\n\n// Helper function, checks whether change of `marker` at `modelPosition` should be converted. Marker changes are not\n// converted if they happen inside an element with custom conversion method.\n//\n// @param {module:engine/model/position~Position} modelPosition\n// @param {module:engine/model/markercollection~Marker} marker\n// @param {module:engine/conversion/mapper~Mapper} mapper\n// @returns {Boolean}\nfunction shouldMarkerChangeBeConverted( modelPosition, marker, mapper ) {\n\tconst range = marker.getRange();\n\tconst ancestors = Array.from( modelPosition.getAncestors() );\n\tancestors.shift(); // Remove root element. It cannot be passed to `model.Range#containsItem`.\n\tancestors.reverse();\n\n\tconst hasCustomHandling = ancestors.some( element => {\n\t\tif ( range.containsItem( element ) ) {\n\t\t\tconst viewElement = mapper.toViewElement( element );\n\n\t\t\treturn !!viewElement.getCustomProperty( 'addHighlight' );\n\t\t}\n\t} );\n\n\treturn !hasCustomHandling;\n}\n\n/**\n * Conversion interface that is registered for given {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n * and is passed as one of parameters when {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher dispatcher}\n * fires it's events.\n *\n * @interface module:engine/conversion/downcastdispatcher~DowncastConversionApi\n */\n\n/**\n * The {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} instance.\n *\n * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher} #dispatcher\n */\n\n/**\n * Stores information about what parts of processed model item are still waiting to be handled. After a piece of model item\n * was converted, appropriate consumable value should be {@link module:engine/conversion/modelconsumable~ModelConsumable#consume consumed}.\n *\n * @member {module:engine/conversion/modelconsumable~ModelConsumable} #consumable\n */\n\n/**\n * The {@link module:engine/conversion/mapper~Mapper} instance.\n *\n * @member {module:engine/conversion/mapper~Mapper} #mapper\n */\n\n/**\n * The {@link module:engine/view/downcastwriter~DowncastWriter} instance used to manipulate data during conversion.\n *\n * @member {module:engine/view/downcastwriter~DowncastWriter} #writer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/selection\n */\n\nimport Position from './position';\nimport Element from './element';\nimport Node from './node';\nimport Range from './range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n/**\n * Selection is a set of {@link module:engine/model/range~Range ranges}. It has a direction specified by its\n * {@link module:engine/model/selection~Selection#anchor anchor} and {@link module:engine/model/selection~Selection#focus focus}\n * (it can be {@link module:engine/model/selection~Selection#isBackward forward or backward}).\n * Additionally, selection may have its own attributes (think – whether text typed in in this selection\n * should have those attributes – e.g. whether you type a bolded text).\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Selection {\n\t/**\n\t * Creates a new selection instance based on the given {@link module:engine/model/selection~Selectable selectable}\n\t * or creates an empty selection if no arguments were passed.\n\t *\n\t *\t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\tconst selection = writer.createSelection( documentSelection );\n\t *\n\t *\t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates selection at the given offset in the given element.\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/model/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * Selection's constructor allow passing additional options (`'backward'`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tconstructor( selectable, placeOrOffset, options ) {\n\t\t/**\n\t\t * Specifies whether the last added range was added as a backward or forward range.\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._lastRangeBackward = false;\n\n\t\t/**\n\t\t * Stores selection ranges.\n\t\t *\n\t\t * @protected\n\t\t * @type {Array.<module:engine/model/range~Range>}\n\t\t */\n\t\tthis._ranges = [];\n\n\t\t/**\n\t\t * List of attributes set on current selection.\n\t\t *\n\t\t * @protected\n\t\t * @type {Map.<String,*>}\n\t\t */\n\t\tthis._attrs = new Map();\n\n\t\tif ( selectable ) {\n\t\t\tthis.setTo( selectable, placeOrOffset, options );\n\t\t}\n\t}\n\n\t/**\n\t * Selection anchor. Anchor is the position from which the selection was started. If a user is making a selection\n\t * by dragging the mouse, the anchor is where the user pressed the mouse button (the beggining of the selection).\n\t *\n\t * Anchor and {@link #focus} define the direction of the selection, which is important\n\t * when expanding/shrinking selection. The focus moves, while the anchor should remain in the same place.\n\t *\n\t * Anchor is always set to the {@link module:engine/model/range~Range#start start} or\n\t * {@link module:engine/model/range~Range#end end} position of the last of selection's ranges. Whether it is\n\t * the `start` or `end` depends on the specified `options.backward`. See the {@link #setTo `setTo()`} method.\n\t *\n\t * May be set to `null` if there are no ranges in the selection.\n\t *\n\t * @see #focus\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget anchor() {\n\t\tif ( this._ranges.length > 0 ) {\n\t\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\n\t\t\treturn this._lastRangeBackward ? range.end : range.start;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Selection focus. Focus is the position where the selection ends. If a user is making a selection\n\t * by dragging the mouse, the focus is where the mouse cursor is.\n\t *\n\t * May be set to `null` if there are no ranges in the selection.\n\t *\n\t * @see #anchor\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget focus() {\n\t\tif ( this._ranges.length > 0 ) {\n\t\t\tconst range = this._ranges[ this._ranges.length - 1 ];\n\n\t\t\treturn this._lastRangeBackward ? range.start : range.end;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Whether the selection is collapsed. Selection is collapsed when there is exactly one range in it\n\t * and it is collapsed.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\tconst length = this._ranges.length;\n\n\t\tif ( length === 1 ) {\n\t\t\treturn this._ranges[ 0 ].isCollapsed;\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the number of ranges in the selection.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._ranges.length;\n\t}\n\n\t/**\n\t * Specifies whether the selection's {@link #focus} precedes the selection's {@link #anchor}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn !this.isCollapsed && this._lastRangeBackward;\n\t}\n\n\t/**\n\t * Checks whether this selection is equal to the given selection. Selections are equal if they have the same directions,\n\t * the same number of ranges and all ranges from one selection equal to ranges from the another selection.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} otherSelection\n\t * Selection to compare with.\n\t * @returns {Boolean} `true` if selections are equal, `false` otherwise.\n\t */\n\tisEqual( otherSelection ) {\n\t\tif ( this.rangeCount != otherSelection.rangeCount ) {\n\t\t\treturn false;\n\t\t} else if ( this.rangeCount === 0 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( !this.anchor.isEqual( otherSelection.anchor ) || !this.focus.isEqual( otherSelection.focus ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tfor ( const thisRange of this._ranges ) {\n\t\t\tlet found = false;\n\n\t\t\tfor ( const otherRange of otherSelection._ranges ) {\n\t\t\t\tif ( thisRange.isEqual( otherRange ) ) {\n\t\t\t\t\tfound = true;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( !found ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns an iterable object that iterates over copies of selection ranges.\n\t *\n\t * @returns {Iterable.<module:engine/model/range~Range>}\n\t */\n\t* getRanges() {\n\t\tfor ( const range of this._ranges ) {\n\t\t\tyield new Range( range.start, range.end );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a copy of the first range in the selection.\n\t * First range is the one which {@link module:engine/model/range~Range#start start} position\n\t * {@link module:engine/model/position~Position#isBefore is before} start position of all other ranges\n\t * (not to confuse with the first range added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\tlet first = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !first || range.start.isBefore( first.start ) ) {\n\t\t\t\tfirst = range;\n\t\t\t}\n\t\t}\n\n\t\treturn first ? new Range( first.start, first.end ) : null;\n\t}\n\n\t/**\n\t * Returns a copy of the last range in the selection.\n\t * Last range is the one which {@link module:engine/model/range~Range#end end} position\n\t * {@link module:engine/model/position~Position#isAfter is after} end position of all other ranges (not to confuse with the range most\n\t * recently added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\tlet last = null;\n\n\t\tfor ( const range of this._ranges ) {\n\t\t\tif ( !last || range.end.isAfter( last.end ) ) {\n\t\t\t\tlast = range;\n\t\t\t}\n\t\t}\n\n\t\treturn last ? new Range( last.start, last.end ) : null;\n\t}\n\n\t/**\n\t * Returns the first position in the selection.\n\t * First position is the position that {@link module:engine/model/position~Position#isBefore is before}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\tconst first = this.getFirstRange();\n\n\t\treturn first ? first.start.clone() : null;\n\t}\n\n\t/**\n\t * Returns the last position in the selection.\n\t * Last position is the position that {@link module:engine/model/position~Position#isAfter is after}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\tconst lastRange = this.getLastRange();\n\n\t\treturn lastRange ? lastRange.end.clone() : null;\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable}.\n\t *\n\t *\t\t// Removes all selection's ranges.\n\t *\t\tselection.setTo( null );\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tselection.setTo( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tselection.setTo( ranges );\n\t *\n\t *\t\t// Sets selection to other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tselection.setTo( otherSelection );\n\t *\n\t *\t\t// Sets selection to the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = new DocumentSelection( doc );\n\t *\t\tselection.setTo( documentSelection );\n\t *\n\t *\t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tselection.setTo( position );\n\t *\n\t *\t\t// Sets collapsed selection at the position of the given node and an offset.\n\t *\t\tselection.setTo( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t *\t\tselection.setTo( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\tselection.setTo( paragraph, 'on' );\n\t *\n\t * `Selection#setTo()`' method allow passing additional options (`backward`) as the last argument.\n\t *\n\t *\t\t// Sets backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tsetTo( selectable, placeOrOffset, options ) {\n\t\tif ( selectable === null ) {\n\t\t\tthis._setRanges( [] );\n\t\t} else if ( selectable instanceof Selection ) {\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t} else if ( selectable && typeof selectable.getRanges == 'function' ) {\n\t\t\t// We assume that the selectable is a DocumentSelection.\n\t\t\t// It can't be imported here, because it would lead to circular imports.\n\t\t\tthis._setRanges( selectable.getRanges(), selectable.isBackward );\n\t\t} else if ( selectable instanceof Range ) {\n\t\t\tthis._setRanges( [ selectable ], !!placeOrOffset && !!placeOrOffset.backward );\n\t\t} else if ( selectable instanceof Position ) {\n\t\t\tthis._setRanges( [ new Range( selectable ) ] );\n\t\t} else if ( selectable instanceof Node ) {\n\t\t\tconst backward = !!options && !!options.backward;\n\t\t\tlet range;\n\n\t\t\tif ( placeOrOffset == 'in' ) {\n\t\t\t\trange = Range._createIn( selectable );\n\t\t\t} else if ( placeOrOffset == 'on' ) {\n\t\t\t\trange = Range._createOn( selectable );\n\t\t\t} else if ( placeOrOffset !== undefined ) {\n\t\t\t\trange = new Range( Position._createAt( selectable, placeOrOffset ) );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * selection.setTo requires the second parameter when the first parameter is a node.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-setTo-required-second-parameter\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-setTo-required-second-parameter: ' +\n\t\t\t\t\t'selection.setTo requires the second parameter when the first parameter is a node.',\n\t\t\t\t\t[ this, selectable ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tthis._setRanges( [ range ], backward );\n\t\t} else if ( isIterable( selectable ) ) {\n\t\t\t// We assume that the selectable is an iterable of ranges.\n\t\t\tthis._setRanges( selectable, placeOrOffset && !!placeOrOffset.backward );\n\t\t} else {\n\t\t\t/**\n\t\t\t * Cannot set the selection to the given place.\n\t\t\t *\n\t\t\t * Invalid parameters were specified when setting the selection. Common issues:\n\t\t\t *\n\t\t\t * * A {@link module:engine/model/textproxy~TextProxy} instance was passed instead of\n\t\t\t * a real {@link module:engine/model/text~Text}.\n\t\t\t * * View nodes were passed instead of model nodes.\n\t\t\t * * `null`/`undefined` was passed.\n\t\t\t *\n\t\t\t * @error model-selection-setTo-not-selectable\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-selection-setTo-not-selectable: Cannot set the selection to the given place.',\n\t\t\t\t[ this, selectable ]\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * Replaces all ranges that were added to the selection with given array of ranges. Last range of the array\n\t * is treated like the last added range and is used to set {@link module:engine/model/selection~Selection#anchor} and\n\t * {@link module:engine/model/selection~Selection#focus}. Accepts a flag describing in which direction the selection is made.\n\t *\n\t * @protected\n\t * @fires change:range\n\t * @param {Iterable.<module:engine/model/range~Range>} newRanges Ranges to set.\n\t * @param {Boolean} [isLastBackward=false] Flag describing if last added range was selected forward - from start to end (`false`)\n\t * or backward - from end to start (`true`).\n\t */\n\t_setRanges( newRanges, isLastBackward = false ) {\n\t\tnewRanges = Array.from( newRanges );\n\n\t\t// Check whether there is any range in new ranges set that is different than all already added ranges.\n\t\tconst anyNewRange = newRanges.some( newRange => {\n\t\t\tif ( !( newRange instanceof Range ) ) {\n\t\t\t\t/**\n\t\t\t\t * Selection range set to an object that is not an instance of {@link module:engine/model/range~Range}.\n\t\t\t\t *\n\t\t\t\t * Only {@link module:engine/model/range~Range} instances can be used to set a selection.\n\t\t\t\t * Common mistakes leading to this error are:\n\t\t\t\t *\n\t\t\t\t * * using DOM `Range` object,\n\t\t\t\t * * incorrect CKEditor 5 installation with multiple `ckeditor5-engine` packages having different versions.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-set-ranges-not-range\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-set-ranges-not-range: ' +\n\t\t\t\t\t'Selection range set to an object that is not an instance of model.Range.',\n\t\t\t\t\t[ this, newRanges ]\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn this._ranges.every( oldRange => {\n\t\t\t\treturn !oldRange.isEqual( newRange );\n\t\t\t} );\n\t\t} );\n\n\t\t// Don't do anything if nothing changed.\n\t\tif ( newRanges.length === this._ranges.length && !anyNewRange ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._removeAllRanges();\n\n\t\tfor ( const range of newRanges ) {\n\t\t\tthis._pushRange( range );\n\t\t}\n\n\t\tthis._lastRangeBackward = !!isLastBackward;\n\n\t\tthis.fire( 'change:range', { directChange: true } );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/selection~Selection#focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link module:engine/model/writer~Writer#createPositionAt writer.createPositionAt()} parameters.\n\t *\n\t * @fires change:range\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tsetFocus( itemOrPosition, offset ) {\n\t\tif ( this.anchor === null ) {\n\t\t\t/**\n\t\t\t * Cannot set selection focus if there are no ranges in selection.\n\t\t\t *\n\t\t\t * @error model-selection-setFocus-no-ranges\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.',\n\t\t\t\t[ this, itemOrPosition ]\n\t\t\t);\n\t\t}\n\n\t\tconst newFocus = Position._createAt( itemOrPosition, offset );\n\n\t\tif ( newFocus.compareWith( this.focus ) == 'same' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst anchor = this.anchor;\n\n\t\tif ( this._ranges.length ) {\n\t\t\tthis._popRange();\n\t\t}\n\n\t\tif ( newFocus.compareWith( anchor ) == 'before' ) {\n\t\t\tthis._pushRange( new Range( newFocus, anchor ) );\n\t\t\tthis._lastRangeBackward = true;\n\t\t} else {\n\t\t\tthis._pushRange( new Range( anchor, newFocus ) );\n\t\t\tthis._lastRangeBackward = false;\n\t\t}\n\n\t\tthis.fire( 'change:range', { directChange: true } );\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on the selection.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._attrs.entries();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._attrs.keys();\n\t}\n\n\t/**\n\t * Checks if the selection has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on selection, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the selection.\n\t *\n\t * If given attribute was set on the selection, fires the {@link #event:change:range} event with\n\t * removed attribute key.\n\t *\n\t * @fires change:attribute\n\t * @param {String} key Key of attribute to remove.\n\t */\n\tremoveAttribute( key ) {\n\t\tif ( this.hasAttribute( key ) ) {\n\t\t\tthis._attrs.delete( key );\n\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: [ key ], directChange: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Sets attribute on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * If the attribute value has changed, fires the {@link #event:change:range} event with\n\t * the attribute key.\n\t *\n\t * @fires change:attribute\n\t * @param {String} key Key of attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\tsetAttribute( key, value ) {\n\t\tif ( this.getAttribute( key ) !== value ) {\n\t\t\tthis._attrs.set( key, value );\n\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: [ key ], directChange: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/model/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\tif ( this.rangeCount !== 1 ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst range = this.getFirstRange();\n\t\tconst nodeAfterStart = range.start.nodeAfter;\n\t\tconst nodeBeforeEnd = range.end.nodeBefore;\n\n\t\treturn ( nodeAfterStart instanceof Element && nodeAfterStart == nodeBeforeEnd ) ? nodeAfterStart : null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'model:selection' ); // -> true\n\t *\n\t *\t\tselection.is( 'view:selection' ); // -> false\n\t *\t\tselection.is( 'range' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' || type == 'model:selection';\n\t}\n\n\t/**\n\t * Gets elements of type {@link module:engine/model/schema~Schema#isBlock \"block\"} touched by the selection.\n\t *\n\t * This method's result can be used for example to apply block styling to all blocks covered by this selection.\n\t *\n\t * **Note:** `getSelectedBlocks()` returns blocks that are nested in other non-block elements\n\t * but will not return blocks nested in other blocks.\n\t *\n\t * In this case the function will return exactly all 3 paragraphs (note: `<blockQuote>` is not a block itself):\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<blockQuote>\n\t *\t\t\t<paragraph>b</paragraph>\n\t *\t\t</blockQuote>\n\t *\t\t<paragraph>c]d</paragraph>\n\t *\n\t * In this case the paragraph will also be returned, despite the collapsed selection:\n\t *\n\t *\t\t<paragraph>[]a</paragraph>\n\t *\n\t * In such a scenario, however, only blocks A, B & E will be returned as blocks C & D are nested in block B:\n\t *\n\t *\t\t[<blockA></blockA>\n\t *\t\t<blockB>\n\t *\t\t\t<blockC></blockC>\n\t *\t\t\t<blockD></blockD>\n\t *\t\t</blockB>\n\t *\t\t<blockE></blockE>]\n\t *\n\t * If the selection is inside a block all the inner blocks (A & B) are returned:\n\t *\n\t * \t\t<block>\n\t *\t\t\t<blockA>[a</blockA>\n\t * \t\t\t<blockB>b]</blockB>\n\t * \t\t</block>\n\t *\n\t * **Special case**: If a selection ends at the beginning of a block, that block is not returned as from user perspective\n\t * this block wasn't selected. See [#984](https://github.com/ckeditor/ckeditor5-engine/issues/984) for more details.\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<paragraph>b</paragraph>\n\t *\t\t<paragraph>]c</paragraph> // this block will not be returned\n\t *\n\t * @returns {Iterable.<module:engine/model/element~Element>}\n\t */\n\t* getSelectedBlocks() {\n\t\tconst visited = new WeakSet();\n\n\t\tfor ( const range of this.getRanges() ) {\n\t\t\t// Get start block of range in case of a collapsed range.\n\t\t\tconst startBlock = getParentBlock( range.start, visited );\n\n\t\t\tif ( startBlock && isTopBlockInRange( startBlock, range ) ) {\n\t\t\t\tyield startBlock;\n\t\t\t}\n\n\t\t\tfor ( const value of range.getWalker() ) {\n\t\t\t\tconst block = value.item;\n\n\t\t\t\tif ( value.type == 'elementEnd' && isUnvisitedTopBlock( block, visited, range ) ) {\n\t\t\t\t\tyield block;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tconst endBlock = getParentBlock( range.end, visited );\n\n\t\t\t// #984. Don't return the end block if the range ends right at its beginning.\n\t\t\tif ( endBlock && !range.end.isTouching( Position._createAt( endBlock, 0 ) ) && isTopBlockInRange( endBlock, range ) ) {\n\t\t\t\tyield endBlock;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether the selection contains the entire content of the given element. This means that selection must start\n\t * at a position {@link module:engine/model/position~Position#isTouching touching} the element's start and ends at position\n\t * touching the element's end.\n\t *\n\t * By default, this method will check whether the entire content of the selection's current root is selected.\n\t * Useful to check if e.g. the user has just pressed <kbd>Ctrl</kbd> + <kbd>A</kbd>.\n\t *\n\t * @param {module:engine/model/element~Element} [element=this.anchor.root]\n\t * @returns {Boolean}\n\t */\n\tcontainsEntireContent( element = this.anchor.root ) {\n\t\tconst limitStartPosition = Position._createAt( element, 0 );\n\t\tconst limitEndPosition = Position._createAt( element, 'end' );\n\n\t\treturn limitStartPosition.isTouching( this.getFirstPosition() ) &&\n\t\t\tlimitEndPosition.isTouching( this.getLastPosition() );\n\t}\n\n\t/**\n\t * Adds given range to internal {@link #_ranges ranges array}. Throws an error\n\t * if given range is intersecting with any range that is already stored in this selection.\n\t *\n\t * @protected\n\t * @param {module:engine/model/range~Range} range Range to add.\n\t */\n\t_pushRange( range ) {\n\t\tthis._checkRange( range );\n\t\tthis._ranges.push( new Range( range.start, range.end ) );\n\t}\n\n\t/**\n\t * Checks if given range intersects with ranges that are already in the selection. Throws an error if it does.\n\t *\n\t * @protected\n\t * @param {module:engine/model/range~Range} range Range to check.\n\t */\n\t_checkRange( range ) {\n\t\tfor ( let i = 0; i < this._ranges.length; i++ ) {\n\t\t\tif ( range.isIntersecting( this._ranges[ i ] ) ) {\n\t\t\t\t/**\n\t\t\t\t * Trying to add a range that intersects with another range in the selection.\n\t\t\t\t *\n\t\t\t\t * @error model-selection-range-intersects\n\t\t\t\t * @param {module:engine/model/range~Range} addedRange Range that was added to the selection.\n\t\t\t\t * @param {module:engine/model/range~Range} intersectingRange Range in the selection that intersects with `addedRange`.\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-selection-range-intersects: Trying to add a range that intersects with another range in the selection.',\n\t\t\t\t\t[ this, range ],\n\t\t\t\t\t{ addedRange: range, intersectingRange: this._ranges[ i ] }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Deletes ranges from internal range array. Uses {@link #_popRange _popRange} to\n\t * ensure proper ranges removal.\n\t *\n\t * @protected\n\t */\n\t_removeAllRanges() {\n\t\twhile ( this._ranges.length > 0 ) {\n\t\t\tthis._popRange();\n\t\t}\n\t}\n\n\t/**\n\t * Removes most recently added range from the selection.\n\t *\n\t * @protected\n\t */\n\t_popRange() {\n\t\tthis._ranges.pop();\n\t}\n\n\t/**\n\t * Fired when selection range(s) changed.\n\t *\n\t * @event change:range\n\t * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n\t * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n\t * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its position\n\t * was directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n\t * changed because the structure of the model has been changed (which means an indirect change).\n\t * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n\t * which mean that they are not updated once the document changes.\n\t */\n\n\t/**\n\t * Fired when selection attribute changed.\n\t *\n\t * @event change:attribute\n\t * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n\t * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n\t * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its attributes\n\t * were directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n\t * changed in the model and its attributes were refreshed (which means an indirect change).\n\t * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n\t * which mean that they are not updated once the document changes.\n\t * @param {Array.<String>} attributeKeys Array containing keys of attributes that changed.\n\t */\n}\n\nmix( Selection, EmitterMixin );\n\n// Checks whether the given element extends $block in the schema and has a parent (is not a root).\n// Marks it as already visited.\nfunction isUnvisitedBlock( element, visited ) {\n\tif ( visited.has( element ) ) {\n\t\treturn false;\n\t}\n\n\tvisited.add( element );\n\n\treturn element.document.model.schema.isBlock( element ) && element.parent;\n}\n\n// Checks if the given element is a $block was not previously visited and is a top block in a range.\nfunction isUnvisitedTopBlock( element, visited, range ) {\n\treturn isUnvisitedBlock( element, visited ) && isTopBlockInRange( element, range );\n}\n\n// Finds the lowest element in position's ancestors which is a block.\n// It will search until first ancestor that is a limit element.\n// Marks all ancestors as already visited to not include any of them later on.\nfunction getParentBlock( position, visited ) {\n\tconst schema = position.parent.document.model.schema;\n\n\tconst ancestors = position.parent.getAncestors( { parentFirst: true, includeSelf: true } );\n\n\tlet hasParentLimit = false;\n\n\tconst block = ancestors.find( element => {\n\t\t// Stop searching after first parent node that is limit element.\n\t\tif ( hasParentLimit ) {\n\t\t\treturn false;\n\t\t}\n\n\t\thasParentLimit = schema.isLimit( element );\n\n\t\treturn !hasParentLimit && isUnvisitedBlock( element, visited );\n\t} );\n\n\t// Mark all ancestors of this position's parent, because find() might've stopped early and\n\t// the found block may be a child of another block.\n\tancestors.forEach( element => visited.add( element ) );\n\n\treturn block;\n}\n\n// Checks if the blocks is not nested in other block inside a range.\n//\n// @param {module:engine/model/elmenent~Element} block Block to check.\n// @param {module:engine/model/range~Range} range Range to check.\nfunction isTopBlockInRange( block, range ) {\n\tconst parentBlock = findAncestorBlock( block );\n\n\tif ( !parentBlock ) {\n\t\treturn true;\n\t}\n\n\t// Add loose flag to check as parentRange can be equal to range.\n\tconst isParentInRange = range.containsRange( Range._createOn( parentBlock ), true );\n\n\treturn !isParentInRange;\n}\n\n// Returns first ancestor block of a node.\n//\n// @param {module:engine/model/node~Node} node\n// @returns {module:engine/model/node~Node|undefined}\nfunction findAncestorBlock( node ) {\n\tconst schema = node.document.model.schema;\n\n\tlet parent = node.parent;\n\n\twhile ( parent ) {\n\t\tif ( schema.isBlock( parent ) ) {\n\t\t\treturn parent;\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n}\n\n/**\n * An entity that is used to set selection.\n *\n * See also {@link module:engine/model/selection~Selection#setTo}\n *\n * @typedef {\n * module:engine/model/selection~Selection|\n * module:engine/model/documentselection~DocumentSelection|\n * module:engine/model/position~Position|\n * module:engine/model/range~Range|\n * module:engine/model/node~Node|\n * Iterable.<module:engine/model/range~Range>|\n * null\n * } module:engine/model/selection~Selectable\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/liverange\n */\n\nimport Range from './range';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * `LiveRange` is a type of {@link module:engine/model/range~Range Range}\n * that updates itself as {@link module:engine/model/document~Document document}\n * is changed through operations. It may be used as a bookmark.\n *\n * **Note:** Be very careful when dealing with `LiveRange`. Each `LiveRange` instance bind events that might\n * have to be unbound. Use {@link module:engine/model/liverange~LiveRange#detach detach} whenever you don't need `LiveRange` anymore.\n */\nexport default class LiveRange extends Range {\n\t/**\n\t * Creates a live range.\n\t *\n\t * @see module:engine/model/range~Range\n\t */\n\tconstructor( start, end ) {\n\t\tsuper( start, end );\n\n\t\tbindWithDocument.call( this );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by `LiveRange`. Use it whenever you don't need `LiveRange` instance\n\t * anymore (i.e. when leaving scope in which it was declared or before re-assigning variable that was\n\t * referring to it).\n\t */\n\tdetach() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tliveRange.is( 'range' ); // -> true\n\t *\t\tliveRange.is( 'model:range' ); // -> true\n\t *\t\tliveRange.is( 'liveRange' ); // -> true\n\t *\t\tliveRange.is( 'model:liveRange' ); // -> true\n\t *\n\t *\t\tliveRange.is( 'view:range' ); // -> false\n\t *\t\tliveRange.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'liveRange' || type == 'model:liveRange' || super.is( type );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/range~Range range instance} that is equal to this live range.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\ttoRange() {\n\t\treturn new Range( this.start, this.end );\n\t}\n\n\t/**\n\t * Creates a `LiveRange` instance that is equal to the given range.\n\t *\n\t * @param {module:engine/model/range~Range} range\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\tstatic fromRange( range ) {\n\t\treturn new LiveRange( range.start, range.end );\n\t}\n\n\t/**\n\t * @see module:engine/model/range~Range._createIn\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createIn\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * @see module:engine/model/range~Range._createOn\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createOn\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * @see module:engine/model/range~Range._createFromPositionAndShift\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liverange~LiveRange._createFromPositionAndShift\n\t * @param {module:engine/model/position~Position} position\n\t * @param {Number} shift\n\t * @returns {module:engine/model/liverange~LiveRange}\n\t */\n\n\t/**\n\t * Fired when `LiveRange` instance boundaries have changed due to changes in the\n\t * {@link module:engine/model/document~Document document}.\n\t *\n\t * @event change:range\n\t * @param {module:engine/model/range~Range} oldRange Range with start and end position equal to start and end position of this live\n\t * range before it got changed.\n\t * @param {Object} data Object with additional information about the change.\n\t * @param {module:engine/model/position~Position|null} data.deletionPosition Source position for remove and merge changes.\n\t * Available if the range was moved to the graveyard root, `null` otherwise.\n\t */\n\n\t/**\n\t * Fired when `LiveRange` instance boundaries have not changed after a change in {@link module:engine/model/document~Document document}\n\t * but the change took place inside the range, effectively changing its content.\n\t *\n\t * @event change:content\n\t * @param {module:engine/model/range~Range} range Range with start and end position equal to start and end position of\n\t * change range.\n\t * @param {Object} data Object with additional information about the change.\n\t * @param {null} data.deletionPosition Due to the nature of this event, this property is always set to `null`. It is passed\n\t * for compatibility with the {@link module:engine/model/liverange~LiveRange#event:change:range} event.\n\t */\n}\n\n// Binds this `LiveRange` to the {@link module:engine/model/document~Document document}\n// that owns this range's {@link module:engine/model/range~Range#root root}.\n//\n// @private\nfunction bindWithDocument() {\n\tthis.listenTo(\n\t\tthis.root.document.model,\n\t\t'applyOperation',\n\t\t( event, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\ttransform.call( this, operation );\n\t\t},\n\t\t{ priority: 'low' }\n\t);\n}\n\n// Updates this range accordingly to the updates applied to the model. Bases on change events.\n//\n// @private\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\nfunction transform( operation ) {\n\t// Transform the range by the operation. Join the result ranges if needed.\n\tconst ranges = this.getTransformedByOperation( operation );\n\tconst result = Range._createFromRanges( ranges );\n\n\tconst boundariesChanged = !result.isEqual( this );\n\tconst contentChanged = doesOperationChangeRangeContent( this, operation );\n\n\tlet deletionPosition = null;\n\n\tif ( boundariesChanged ) {\n\t\t// If range boundaries have changed, fire `change:range` event.\n\t\t//\n\t\tif ( result.root.rootName == '$graveyard' ) {\n\t\t\t// If the range was moved to the graveyard root, set `deletionPosition`.\n\t\t\tif ( operation.type == 'remove' ) {\n\t\t\t\tdeletionPosition = operation.sourcePosition;\n\t\t\t} else {\n\t\t\t\t// Merge operation.\n\t\t\t\tdeletionPosition = operation.deletionPosition;\n\t\t\t}\n\t\t}\n\n\t\tconst oldRange = this.toRange();\n\n\t\tthis.start = result.start;\n\t\tthis.end = result.end;\n\n\t\tthis.fire( 'change:range', oldRange, { deletionPosition } );\n\t} else if ( contentChanged ) {\n\t\t// If range boundaries have not changed, but there was change inside the range, fire `change:content` event.\n\t\tthis.fire( 'change:content', this.toRange(), { deletionPosition } );\n\t}\n}\n\n// Checks whether given operation changes something inside the range (even if it does not change boundaries).\n//\n// @private\n// @param {module:engine/model/range~Range} range Range to check.\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\n// @returns {Boolean}\nfunction doesOperationChangeRangeContent( range, operation ) {\n\tswitch ( operation.type ) {\n\t\tcase 'insert':\n\t\t\treturn range.containsPosition( operation.position );\n\t\tcase 'move':\n\t\tcase 'remove':\n\t\tcase 'reinsert':\n\t\tcase 'merge':\n\t\t\treturn range.containsPosition( operation.sourcePosition ) ||\n\t\t\t\trange.start.isEqual( operation.sourcePosition ) ||\n\t\t\t\trange.containsPosition( operation.targetPosition );\n\t\tcase 'split':\n\t\t\treturn range.containsPosition( operation.splitPosition ) || range.containsPosition( operation.insertionPosition );\n\t}\n\n\treturn false;\n}\n\nmix( LiveRange, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/documentselection\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\n\nimport Selection from './selection';\nimport LiveRange from './liverange';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\n\nconst storePrefix = 'selection:';\n\n/**\n * `DocumentSelection` is a special selection which is used as the\n * {@link module:engine/model/document~Document#selection document's selection}.\n * There can be only one instance of `DocumentSelection` per document.\n *\n * Document selection can only be changed by using the {@link module:engine/model/writer~Writer} instance\n * inside the {@link module:engine/model/model~Model#change `change()`} block, as it provides a secure way to modify model.\n *\n * `DocumentSelection` is automatically updated upon changes in the {@link module:engine/model/document~Document document}\n * to always contain valid ranges. Its attributes are inherited from the text unless set explicitly.\n *\n * Differences between {@link module:engine/model/selection~Selection} and `DocumentSelection` are:\n * * there is always a range in `DocumentSelection` - even if no ranges were added there is a \"default range\"\n * present in the selection,\n * * ranges added to this selection updates automatically when the document changes,\n * * attributes of `DocumentSelection` are updated automatically according to selection ranges.\n *\n * Since `DocumentSelection` uses {@link module:engine/model/liverange~LiveRange live ranges}\n * and is updated when {@link module:engine/model/document~Document document}\n * changes, it cannot be set on {@link module:engine/model/node~Node nodes}\n * that are inside {@link module:engine/model/documentfragment~DocumentFragment document fragment}.\n * If you need to represent a selection in document fragment,\n * use {@link module:engine/model/selection~Selection Selection class} instead.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class DocumentSelection {\n\t/**\n\t * Creates an empty live selection for given {@link module:engine/model/document~Document}.\n\t *\n\t * @param {module:engine/model/document~Document} doc Document which owns this selection.\n\t */\n\tconstructor( doc ) {\n\t\t/**\n\t\t * Selection used internally by that class (`DocumentSelection` is a proxy to that selection).\n\t\t *\n\t\t * @protected\n\t\t */\n\t\tthis._selection = new LiveSelection( doc );\n\n\t\tthis._selection.delegate( 'change:range' ).to( this );\n\t\tthis._selection.delegate( 'change:attribute' ).to( this );\n\t}\n\n\t/**\n\t * Returns whether the selection is collapsed. Selection is collapsed when there is exactly one range which is\n\t * collapsed.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this._selection.isCollapsed;\n\t}\n\n\t/**\n\t * Selection anchor. Anchor may be described as a position where the most recent part of the selection starts.\n\t * Together with {@link #focus} they define the direction of selection, which is important\n\t * when expanding/shrinking selection. Anchor is always {@link module:engine/model/range~Range#start start} or\n\t * {@link module:engine/model/range~Range#end end} position of the most recently added range.\n\t *\n\t * Is set to `null` if there are no ranges in selection.\n\t *\n\t * @see #focus\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget anchor() {\n\t\treturn this._selection.anchor;\n\t}\n\n\t/**\n\t * Selection focus. Focus is a position where the selection ends.\n\t *\n\t * Is set to `null` if there are no ranges in selection.\n\t *\n\t * @see #anchor\n\t * @readonly\n\t * @type {module:engine/model/position~Position|null}\n\t */\n\tget focus() {\n\t\treturn this._selection.focus;\n\t}\n\n\t/**\n\t * Returns number of ranges in selection.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget rangeCount() {\n\t\treturn this._selection.rangeCount;\n\t}\n\n\t/**\n\t * Describes whether `Documentselection` has own range(s) set, or if it is defaulted to\n\t * {@link module:engine/model/document~Document#_getDefaultRange document's default range}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget hasOwnRange() {\n\t\treturn this._selection.hasOwnRange;\n\t}\n\n\t/**\n\t * Specifies whether the {@link #focus}\n\t * precedes {@link #anchor}.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isBackward() {\n\t\treturn this._selection.isBackward;\n\t}\n\n\t/**\n\t * Describes whether the gravity is overridden (using {@link module:engine/model/writer~Writer#overrideSelectionGravity}) or not.\n\t *\n\t * Note that the gravity remains overridden as long as will not be restored the same number of times as it was overridden.\n\t *\n\t * @readonly\n\t * @returns {Boolean}\n\t */\n\tget isGravityOverridden() {\n\t\treturn this._selection.isGravityOverridden;\n\t}\n\n\t/**\n\t * A collection of selection markers.\n\t * Marker is a selection marker when selection range is inside the marker range.\n\t *\n\t * @readonly\n\t * @type {module:utils/collection~Collection.<module:engine/model/markercollection~Marker>}\n\t */\n\tget markers() {\n\t\treturn this._selection.markers;\n\t}\n\n\t/**\n\t * Used for the compatibility with the {@link module:engine/model/selection~Selection#isEqual} method.\n\t *\n\t * @protected\n\t */\n\tget _ranges() {\n\t\treturn this._selection._ranges;\n\t}\n\n\t/**\n\t * Returns an iterable that iterates over copies of selection ranges.\n\t *\n\t * @returns {Iterable.<module:engine/model/range~Range>}\n\t */\n\tgetRanges() {\n\t\treturn this._selection.getRanges();\n\t}\n\n\t/**\n\t * Returns the first position in the selection.\n\t * First position is the position that {@link module:engine/model/position~Position#isBefore is before}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetFirstPosition() {\n\t\treturn this._selection.getFirstPosition();\n\t}\n\n\t/**\n\t * Returns the last position in the selection.\n\t * Last position is the position that {@link module:engine/model/position~Position#isAfter is after}\n\t * any other position in the selection.\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/position~Position|null}\n\t */\n\tgetLastPosition() {\n\t\treturn this._selection.getLastPosition();\n\t}\n\n\t/**\n\t * Returns a copy of the first range in the selection.\n\t * First range is the one which {@link module:engine/model/range~Range#start start} position\n\t * {@link module:engine/model/position~Position#isBefore is before} start position of all other ranges\n\t * (not to confuse with the first range added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetFirstRange() {\n\t\treturn this._selection.getFirstRange();\n\t}\n\n\t/**\n\t * Returns a copy of the last range in the selection.\n\t * Last range is the one which {@link module:engine/model/range~Range#end end} position\n\t * {@link module:engine/model/position~Position#isAfter is after} end position of all other ranges (not to confuse with the range most\n\t * recently added to the selection).\n\t *\n\t * Returns `null` if there are no ranges in selection.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetLastRange() {\n\t\treturn this._selection.getLastRange();\n\t}\n\n\t/**\n\t * Gets elements of type {@link module:engine/model/schema~Schema#isBlock \"block\"} touched by the selection.\n\t *\n\t * This method's result can be used for example to apply block styling to all blocks covered by this selection.\n\t *\n\t * **Note:** `getSelectedBlocks()` returns blocks that are nested in other non-block elements\n\t * but will not return blocks nested in other blocks.\n\t *\n\t * In this case the function will return exactly all 3 paragraphs (note: `<blockQuote>` is not a block itself):\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<blockQuote>\n\t *\t\t\t<paragraph>b</paragraph>\n\t *\t\t</blockQuote>\n\t *\t\t<paragraph>c]d</paragraph>\n\t *\n\t * In this case the paragraph will also be returned, despite the collapsed selection:\n\t *\n\t *\t\t<paragraph>[]a</paragraph>\n\t *\n\t * In such a scenario, however, only blocks A, B & E will be returned as blocks C & D are nested in block B:\n\t *\n\t *\t\t[<blockA></blockA>\n\t *\t\t<blockB>\n\t *\t\t\t<blockC></blockC>\n\t *\t\t\t<blockD></blockD>\n\t *\t\t</blockB>\n\t *\t\t<blockE></blockE>]\n\t *\n\t * If the selection is inside a block all the inner blocks (A & B) are returned:\n\t *\n\t * \t\t<block>\n\t *\t\t\t<blockA>[a</blockA>\n\t * \t\t\t<blockB>b]</blockB>\n\t * \t\t</block>\n\t *\n\t * **Special case**: If a selection ends at the beginning of a block, that block is not returned as from user perspective\n\t * this block wasn't selected. See [#984](https://github.com/ckeditor/ckeditor5-engine/issues/984) for more details.\n\t *\n\t *\t\t<paragraph>[a</paragraph>\n\t *\t\t<paragraph>b</paragraph>\n\t *\t\t<paragraph>]c</paragraph> // this block will not be returned\n\t *\n\t * @returns {Iterable.<module:engine/model/element~Element>}\n\t */\n\tgetSelectedBlocks() {\n\t\treturn this._selection.getSelectedBlocks();\n\t}\n\n\t/**\n\t * Returns the selected element. {@link module:engine/model/element~Element Element} is considered as selected if there is only\n\t * one range in the selection, and that range contains exactly one element.\n\t * Returns `null` if there is no selected element.\n\t *\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\tgetSelectedElement() {\n\t\treturn this._selection.getSelectedElement();\n\t}\n\n\t/**\n\t * Checks whether the selection contains the entire content of the given element. This means that selection must start\n\t * at a position {@link module:engine/model/position~Position#isTouching touching} the element's start and ends at position\n\t * touching the element's end.\n\t *\n\t * By default, this method will check whether the entire content of the selection's current root is selected.\n\t * Useful to check if e.g. the user has just pressed <kbd>Ctrl</kbd> + <kbd>A</kbd>.\n\t *\n\t * @param {module:engine/model/element~Element} [element=this.anchor.root]\n\t * @returns {Boolean}\n\t */\n\tcontainsEntireContent( element ) {\n\t\treturn this._selection.containsEntireContent( element );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by document selection.\n\t */\n\tdestroy() {\n\t\tthis._selection.destroy();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attribute keys.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetAttributeKeys() {\n\t\treturn this._selection.getAttributeKeys();\n\t}\n\n\t/**\n\t * Returns iterable that iterates over this selection's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\tgetAttributes() {\n\t\treturn this._selection.getAttributes();\n\t}\n\n\t/**\n\t * Gets an attribute value for given key or `undefined` if that attribute is not set on the selection.\n\t *\n\t * @param {String} key Key of attribute to look for.\n\t * @returns {*} Attribute value or `undefined`.\n\t */\n\tgetAttribute( key ) {\n\t\treturn this._selection.getAttribute( key );\n\t}\n\n\t/**\n\t * Checks if the selection has an attribute for given key.\n\t *\n\t * @param {String} key Key of attribute to check.\n\t * @returns {Boolean} `true` if attribute with given key is set on selection, `false` otherwise.\n\t */\n\thasAttribute( key ) {\n\t\treturn this._selection.hasAttribute( key );\n\t}\n\n\t/**\n\t * Refreshes selection attributes and markers according to the current position in the model.\n\t */\n\trefresh() {\n\t\tthis._selection._updateMarkers();\n\t\tthis._selection._updateAttributes( false );\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tselection.is( 'selection' ); // -> true\n\t *\t\tselection.is( 'documentSelection' ); // -> true\n\t *\t\tselection.is( 'model:selection' ); // -> true\n\t *\t\tselection.is( 'model:documentSelection' ); // -> true\n\t *\n\t *\t\tselection.is( 'view:selection' ); // -> false\n\t *\t\tselection.is( 'element' ); // -> false\n\t *\t\tselection.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'selection' ||\n\t\t\ttype == 'model:selection' ||\n\t\t\ttype == 'documentSelection' ||\n\t\t\ttype == 'model:documentSelection';\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/documentselection~DocumentSelection#focus} to the specified location.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelectionFocus} method.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link module:engine/model/writer~Writer#createPositionAt writer.createPositionAt()} parameters.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelectionFocus\n\t * @protected\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\t_setFocus( itemOrPosition, offset ) {\n\t\tthis._selection.setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Sets this selection's ranges and direction to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable}.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelection} method.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelection\n\t * @protected\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\t_setTo( selectable, placeOrOffset, options ) {\n\t\tthis._selection.setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Sets attribute on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#setSelectionAttribute} method.\n\t *\n\t * @see module:engine/model/writer~Writer#setSelectionAttribute\n\t * @protected\n\t * @param {String} key Key of the attribute to set.\n\t * @param {*} value Attribute value.\n\t */\n\t_setAttribute( key, value ) {\n\t\tthis._selection.setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes an attribute with given key from the selection.\n\t * If the given attribute was set on the selection, fires the {@link module:engine/model/selection~Selection#event:change:range}\n\t * event with removed attribute key.\n\t * Should be used only within the {@link module:engine/model/writer~Writer#removeSelectionAttribute} method.\n\t *\n\t * @see module:engine/model/writer~Writer#removeSelectionAttribute\n\t * @protected\n\t * @param {String} key Key of the attribute to remove.\n\t */\n\t_removeAttribute( key ) {\n\t\tthis._selection.removeAttribute( key );\n\t}\n\n\t/**\n\t * Returns an iterable that iterates through all selection attributes stored in current selection's parent.\n\t *\n\t * @protected\n\t * @returns {Iterable.<*>}\n\t */\n\t_getStoredAttributes() {\n\t\treturn this._selection._getStoredAttributes();\n\t}\n\n\t/**\n\t * Temporarily changes the gravity of the selection from the left to the right.\n\t *\n\t * The gravity defines from which direction the selection inherits its attributes. If it's the default left\n\t * gravity, the selection (after being moved by the the user) inherits attributes from its left hand side.\n\t * This method allows to temporarily override this behavior by forcing the gravity to the right.\n\t *\n\t * It returns an unique identifier which is required to restore the gravity. It guarantees the symmetry\n\t * of the process.\n\t *\n\t * @see module:engine/model/writer~Writer#overrideSelectionGravity\n\t * @protected\n\t * @returns {String} The unique id which allows restoring the gravity.\n\t */\n\t_overrideGravity() {\n\t\treturn this._selection.overrideGravity();\n\t}\n\n\t/**\n\t * Restores the {@link ~DocumentSelection#_overrideGravity overridden gravity}.\n\t *\n\t * Restoring the gravity is only possible using the unique identifier returned by\n\t * {@link ~DocumentSelection#_overrideGravity}. Note that the gravity remains overridden as long as won't be restored\n\t * the same number of times it was overridden.\n\t *\n\t * @see module:engine/model/writer~Writer#restoreSelectionGravity\n\t * @protected\n\t * @param {String} uid The unique id returned by {@link #_overrideGravity}.\n\t */\n\t_restoreGravity( uid ) {\n\t\tthis._selection.restoreGravity( uid );\n\t}\n\n\t/**\n\t * Generates and returns an attribute key for selection attributes store, basing on original attribute key.\n\t *\n\t * @protected\n\t * @param {String} key Attribute key to convert.\n\t * @returns {String} Converted attribute key, applicable for selection store.\n\t */\n\tstatic _getStoreAttributeKey( key ) {\n\t\treturn storePrefix + key;\n\t}\n\n\t/**\n\t * Checks whether the given attribute key is an attribute stored on an element.\n\t *\n\t * @protected\n\t * @param {String} key\n\t * @returns {Boolean}\n\t */\n\tstatic _isStoreAttributeKey( key ) {\n\t\treturn key.startsWith( storePrefix );\n\t}\n}\n\nmix( DocumentSelection, EmitterMixin );\n\n/**\n * Fired when selection range(s) changed.\n *\n * @event change:range\n * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its position\n * was directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n * changed because the structure of the model has been changed (which means an indirect change).\n * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n * which mean that they are not updated once the document changes.\n */\n\n/**\n * Fired when selection attribute changed.\n *\n * @event change:attribute\n * @param {Boolean} directChange In case of {@link module:engine/model/selection~Selection} class it is always set\n * to `true` which indicates that the selection change was caused by a direct use of selection's API.\n * The {@link module:engine/model/documentselection~DocumentSelection}, however, may change because its attributes\n * were directly changed through the {@link module:engine/model/writer~Writer writer} or because its position was\n * changed in the model and its attributes were refreshed (which means an indirect change).\n * The indirect change does not occur in case of normal (detached) selections because they are \"static\" (as \"not live\")\n * which mean that they are not updated once the document changes.\n * @param {Array.<String>} attributeKeys Array containing keys of attributes that changed.\n */\n\n// `LiveSelection` is used internally by {@link module:engine/model/documentselection~DocumentSelection} and shouldn't be used directly.\n//\n// LiveSelection` is automatically updated upon changes in the {@link module:engine/model/document~Document document}\n// to always contain valid ranges. Its attributes are inherited from the text unless set explicitly.\n//\n// Differences between {@link module:engine/model/selection~Selection} and `LiveSelection` are:\n// * there is always a range in `LiveSelection` - even if no ranges were added there is a \"default range\"\n// present in the selection,\n// * ranges added to this selection updates automatically when the document changes,\n// * attributes of `LiveSelection` are updated automatically according to selection ranges.\n//\n// @extends module:engine/model/selection~Selection\n//\n\nclass LiveSelection extends Selection {\n\t// Creates an empty live selection for given {@link module:engine/model/document~Document}.\n\t// @param {module:engine/model/document~Document} doc Document which owns this selection.\n\tconstructor( doc ) {\n\t\tsuper();\n\n\t\t// List of selection markers.\n\t\t// Marker is a selection marker when selection range is inside the marker range.\n\t\t//\n\t\t// @type {module:utils/collection~Collection}\n\t\tthis.markers = new Collection( { idProperty: 'name' } );\n\n\t\t// Document which owns this selection.\n\t\t//\n\t\t// @protected\n\t\t// @member {module:engine/model/model~Model}\n\t\tthis._model = doc.model;\n\n\t\t// Document which owns this selection.\n\t\t//\n\t\t// @protected\n\t\t// @member {module:engine/model/document~Document}\n\t\tthis._document = doc;\n\n\t\t// Keeps mapping of attribute name to priority with which the attribute got modified (added/changed/removed)\n\t\t// last time. Possible values of priority are: `'low'` and `'normal'`.\n\t\t//\n\t\t// Priorities are used by internal `LiveSelection` mechanisms. All attributes set using `LiveSelection`\n\t\t// attributes API are set with `'normal'` priority.\n\t\t//\n\t\t// @private\n\t\t// @member {Map} module:engine/model/liveselection~LiveSelection#_attributePriority\n\t\tthis._attributePriority = new Map();\n\n\t\t// Contains data required to fix ranges which have been moved to the graveyard.\n\t\t// @private\n\t\t// @member {Array} module:engine/model/liveselection~LiveSelection#_fixGraveyardRangesData\n\t\tthis._fixGraveyardRangesData = [];\n\n\t\t// Flag that informs whether the selection ranges have changed. It is changed on true when `LiveRange#change:range` event is fired.\n\t\t// @private\n\t\t// @member {Array} module:engine/model/liveselection~LiveSelection#_hasChangedRange\n\t\tthis._hasChangedRange = false;\n\n\t\t// Each overriding gravity adds an UID to the set and each removal removes it.\n\t\t// Gravity is overridden when there's at least one UID in the set.\n\t\t// Gravity is restored when the set is empty.\n\t\t// This is to prevent conflicts when gravity is overridden by more than one feature at the same time.\n\t\t// @private\n\t\t// @type {Set}\n\t\tthis._overriddenGravityRegister = new Set();\n\n\t\t// Ensure selection is correct after each operation.\n\t\tthis.listenTo( this._model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation || operation.type == 'marker' || operation.type == 'rename' || operation.type == 'noop' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\twhile ( this._fixGraveyardRangesData.length ) {\n\t\t\t\tconst { liveRange, sourcePosition } = this._fixGraveyardRangesData.shift();\n\n\t\t\t\tthis._fixGraveyardSelection( liveRange, sourcePosition );\n\t\t\t}\n\n\t\t\tif ( this._hasChangedRange ) {\n\t\t\t\tthis._hasChangedRange = false;\n\t\t\t\tthis.fire( 'change:range', { directChange: false } );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Ensure selection is correct and up to date after each range change.\n\t\tthis.on( 'change:range', () => {\n\t\t\tfor ( const range of this.getRanges() ) {\n\t\t\t\tif ( !this._document._validateSelectionRange( range ) ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Range from {@link module:engine/model/documentselection~DocumentSelection document selection}\n\t\t\t\t\t * starts or ends at incorrect position.\n\t\t\t\t\t *\n\t\t\t\t\t * @error document-selection-wrong-position\n\t\t\t\t\t * @param {module:engine/model/range~Range} range\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'document-selection-wrong-position: Range from document selection starts or ends at incorrect position.',\n\t\t\t\t\t\tthis,\n\t\t\t\t\t\t{ range }\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\n\t\t// Update markers data stored by the selection after each marker change.\n\t\tthis.listenTo( this._model.markers, 'update', () => this._updateMarkers() );\n\n\t\t// Ensure selection is up to date after each change block.\n\t\tthis.listenTo( this._document, 'change', ( evt, batch ) => {\n\t\t\tclearAttributesStoredInElement( this._model, batch );\n\t\t} );\n\t}\n\n\tget isCollapsed() {\n\t\tconst length = this._ranges.length;\n\n\t\treturn length === 0 ? this._document._getDefaultRange().isCollapsed : super.isCollapsed;\n\t}\n\n\tget anchor() {\n\t\treturn super.anchor || this._document._getDefaultRange().start;\n\t}\n\n\tget focus() {\n\t\treturn super.focus || this._document._getDefaultRange().end;\n\t}\n\n\tget rangeCount() {\n\t\treturn this._ranges.length ? this._ranges.length : 1;\n\t}\n\n\t// Describes whether `LiveSelection` has own range(s) set, or if it is defaulted to\n\t// {@link module:engine/model/document~Document#_getDefaultRange document's default range}.\n\t//\n\t// @readonly\n\t// @type {Boolean}\n\tget hasOwnRange() {\n\t\treturn this._ranges.length > 0;\n\t}\n\n\t// When set to `true` then selection attributes on node before the caret won't be taken\n\t// into consideration while updating selection attributes.\n\t//\n\t// @protected\n\t// @type {Boolean}\n\tget isGravityOverridden() {\n\t\treturn !!this._overriddenGravityRegister.size;\n\t}\n\n\t// Unbinds all events previously bound by live selection.\n\tdestroy() {\n\t\tfor ( let i = 0; i < this._ranges.length; i++ ) {\n\t\t\tthis._ranges[ i ].detach();\n\t\t}\n\n\t\tthis.stopListening();\n\t}\n\n\t* getRanges() {\n\t\tif ( this._ranges.length ) {\n\t\t\tyield* super.getRanges();\n\t\t} else {\n\t\t\tyield this._document._getDefaultRange();\n\t\t}\n\t}\n\n\tgetFirstRange() {\n\t\treturn super.getFirstRange() || this._document._getDefaultRange();\n\t}\n\n\tgetLastRange() {\n\t\treturn super.getLastRange() || this._document._getDefaultRange();\n\t}\n\n\tsetTo( selectable, optionsOrPlaceOrOffset, options ) {\n\t\tsuper.setTo( selectable, optionsOrPlaceOrOffset, options );\n\t\tthis._updateAttributes( true );\n\t}\n\n\tsetFocus( itemOrPosition, offset ) {\n\t\tsuper.setFocus( itemOrPosition, offset );\n\t\tthis._updateAttributes( true );\n\t}\n\n\tsetAttribute( key, value ) {\n\t\tif ( this._setAttribute( key, value ) ) {\n\t\t\t// Fire event with exact data.\n\t\t\tconst attributeKeys = [ key ];\n\t\t\tthis.fire( 'change:attribute', { attributeKeys, directChange: true } );\n\t\t}\n\t}\n\n\tremoveAttribute( key ) {\n\t\tif ( this._removeAttribute( key ) ) {\n\t\t\t// Fire event with exact data.\n\t\t\tconst attributeKeys = [ key ];\n\t\t\tthis.fire( 'change:attribute', { attributeKeys, directChange: true } );\n\t\t}\n\t}\n\n\toverrideGravity() {\n\t\tconst overrideUid = uid();\n\n\t\t// Remember that another overriding has been requested. It will need to be removed\n\t\t// before the gravity is to be restored.\n\t\tthis._overriddenGravityRegister.add( overrideUid );\n\n\t\tif ( this._overriddenGravityRegister.size === 1 ) {\n\t\t\tthis._updateAttributes( true );\n\t\t}\n\n\t\treturn overrideUid;\n\t}\n\n\trestoreGravity( uid ) {\n\t\tif ( !this._overriddenGravityRegister.has( uid ) ) {\n\t\t\t/**\n\t\t\t * Restoring gravity for an unknown UID is not possible. Make sure you are using a correct\n\t\t\t * UID obtained from the {@link module:engine/model/writer~Writer#overrideSelectionGravity} to restore.\n\t\t\t *\n\t\t\t * @error document-selection-gravity-wrong-restore\n\t\t\t * @param {String} uid The unique identifier returned by\n\t\t\t * {@link module:engine/model/documentselection~DocumentSelection#_overrideGravity}.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'document-selection-gravity-wrong-restore: Attempting to restore the selection gravity for an unknown UID.',\n\t\t\t\tthis,\n\t\t\t\t{ uid }\n\t\t\t);\n\t\t}\n\n\t\tthis._overriddenGravityRegister.delete( uid );\n\n\t\t// Restore gravity only when all overriding have been restored.\n\t\tif ( !this.isGravityOverridden ) {\n\t\t\tthis._updateAttributes( true );\n\t\t}\n\t}\n\n\t_popRange() {\n\t\tthis._ranges.pop().detach();\n\t}\n\n\t_pushRange( range ) {\n\t\tconst liveRange = this._prepareRange( range );\n\n\t\t// `undefined` is returned when given `range` is in graveyard root.\n\t\tif ( liveRange ) {\n\t\t\tthis._ranges.push( liveRange );\n\t\t}\n\t}\n\n\t// Prepares given range to be added to selection. Checks if it is correct,\n\t// converts it to {@link module:engine/model/liverange~LiveRange LiveRange}\n\t// and sets listeners listening to the range's change event.\n\t//\n\t// @private\n\t// @param {module:engine/model/range~Range} range\n\t_prepareRange( range ) {\n\t\tthis._checkRange( range );\n\n\t\tif ( range.root == this._document.graveyard ) {\n\t\t\t// @if CK_DEBUG // console.warn( 'Trying to add a Range that is in the graveyard root. Range rejected.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst liveRange = LiveRange.fromRange( range );\n\n\t\tliveRange.on( 'change:range', ( evt, oldRange, data ) => {\n\t\t\tthis._hasChangedRange = true;\n\n\t\t\t// If `LiveRange` is in whole moved to the graveyard, save necessary data. It will be fixed on `Model#applyOperation` event.\n\t\t\tif ( liveRange.root == this._document.graveyard ) {\n\t\t\t\tthis._fixGraveyardRangesData.push( {\n\t\t\t\t\tliveRange,\n\t\t\t\t\tsourcePosition: data.deletionPosition\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\n\t\treturn liveRange;\n\t}\n\n\t_updateMarkers() {\n\t\tconst markers = [];\n\n\t\tfor ( const marker of this._model.markers ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tfor ( const selectionRange of this.getRanges() ) {\n\t\t\t\tif ( markerRange.containsRange( selectionRange, !selectionRange.isCollapsed ) ) {\n\t\t\t\t\tmarkers.push( marker );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tfor ( const marker of markers ) {\n\t\t\tif ( !this.markers.has( marker ) ) {\n\t\t\t\tthis.markers.add( marker );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const marker of Array.from( this.markers ) ) {\n\t\t\tif ( !markers.includes( marker ) ) {\n\t\t\t\tthis.markers.remove( marker );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Updates this selection attributes according to its ranges and the {@link module:engine/model/document~Document model document}.\n\t//\n\t// @protected\n\t// @param {Boolean} clearAll\n\t// @fires change:attribute\n\t_updateAttributes( clearAll ) {\n\t\tconst newAttributes = toMap( this._getSurroundingAttributes() );\n\t\tconst oldAttributes = toMap( this.getAttributes() );\n\n\t\tif ( clearAll ) {\n\t\t\t// If `clearAll` remove all attributes and reset priorities.\n\t\t\tthis._attributePriority = new Map();\n\t\t\tthis._attrs = new Map();\n\t\t} else {\n\t\t\t// If not, remove only attributes added with `low` priority.\n\t\t\tfor ( const [ key, priority ] of this._attributePriority ) {\n\t\t\t\tif ( priority == 'low' ) {\n\t\t\t\t\tthis._attrs.delete( key );\n\t\t\t\t\tthis._attributePriority.delete( key );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tthis._setAttributesTo( newAttributes );\n\n\t\t// Let's evaluate which attributes really changed.\n\t\tconst changed = [];\n\n\t\t// First, loop through all attributes that are set on selection right now.\n\t\t// Check which of them are different than old attributes.\n\t\tfor ( const [ newKey, newValue ] of this.getAttributes() ) {\n\t\t\tif ( !oldAttributes.has( newKey ) || oldAttributes.get( newKey ) !== newValue ) {\n\t\t\t\tchanged.push( newKey );\n\t\t\t}\n\t\t}\n\n\t\t// Then, check which of old attributes got removed.\n\t\tfor ( const [ oldKey ] of oldAttributes ) {\n\t\t\tif ( !this.hasAttribute( oldKey ) ) {\n\t\t\t\tchanged.push( oldKey );\n\t\t\t}\n\t\t}\n\n\t\t// Fire event with exact data (fire only if anything changed).\n\t\tif ( changed.length > 0 ) {\n\t\t\tthis.fire( 'change:attribute', { attributeKeys: changed, directChange: false } );\n\t\t}\n\t}\n\n\t// Internal method for setting `LiveSelection` attribute. Supports attribute priorities (through `directChange`\n\t// parameter).\n\t//\n\t// @private\n\t// @param {String} key Attribute key.\n\t// @param {*} value Attribute value.\n\t// @param {Boolean} [directChange=true] `true` if the change is caused by `Selection` API, `false` if change\n\t// is caused by `Batch` API.\n\t// @returns {Boolean} Whether value has changed.\n\t_setAttribute( key, value, directChange = true ) {\n\t\tconst priority = directChange ? 'normal' : 'low';\n\n\t\tif ( priority == 'low' && this._attributePriority.get( key ) == 'normal' ) {\n\t\t\t// Priority too low.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst oldValue = super.getAttribute( key );\n\n\t\t// Don't do anything if value has not changed.\n\t\tif ( oldValue === value ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tthis._attrs.set( key, value );\n\n\t\t// Update priorities map.\n\t\tthis._attributePriority.set( key, priority );\n\n\t\treturn true;\n\t}\n\n\t// Internal method for removing `LiveSelection` attribute. Supports attribute priorities (through `directChange`\n\t// parameter).\n\t//\n\t// NOTE: Even if attribute is not present in the selection but is provided to this method, it's priority will\n\t// be changed according to `directChange` parameter.\n\t//\n\t// @private\n\t// @param {String} key Attribute key.\n\t// @param {Boolean} [directChange=true] `true` if the change is caused by `Selection` API, `false` if change\n\t// is caused by `Batch` API.\n\t// @returns {Boolean} Whether attribute was removed. May not be true if such attributes didn't exist or the\n\t// existing attribute had higher priority.\n\t_removeAttribute( key, directChange = true ) {\n\t\tconst priority = directChange ? 'normal' : 'low';\n\n\t\tif ( priority == 'low' && this._attributePriority.get( key ) == 'normal' ) {\n\t\t\t// Priority too low.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Update priorities map.\n\t\tthis._attributePriority.set( key, priority );\n\n\t\t// Don't do anything if value has not changed.\n\t\tif ( !super.hasAttribute( key ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tthis._attrs.delete( key );\n\n\t\treturn true;\n\t}\n\n\t// Internal method for setting multiple `LiveSelection` attributes. Supports attribute priorities (through\n\t// `directChange` parameter).\n\t//\n\t// @private\n\t// @param {Map.<String,*>} attrs Iterable object containing attributes to be set.\n\t// @returns {Set.<String>} Changed attribute keys.\n\t_setAttributesTo( attrs ) {\n\t\tconst changed = new Set();\n\n\t\tfor ( const [ oldKey, oldValue ] of this.getAttributes() ) {\n\t\t\t// Do not remove attribute if attribute with same key and value is about to be set.\n\t\t\tif ( attrs.get( oldKey ) === oldValue ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// All rest attributes will be removed so changed attributes won't change .\n\t\t\tthis._removeAttribute( oldKey, false );\n\t\t}\n\n\t\tfor ( const [ key, value ] of attrs ) {\n\t\t\t// Attribute may not be set because of attributes or because same key/value is already added.\n\t\t\tconst gotAdded = this._setAttribute( key, value, false );\n\n\t\t\tif ( gotAdded ) {\n\t\t\t\tchanged.add( key );\n\t\t\t}\n\t\t}\n\n\t\treturn changed;\n\t}\n\n\t// Returns an iterable that iterates through all selection attributes stored in current selection's parent.\n\t//\n\t// @protected\n\t// @returns {Iterable.<*>}\n\t* _getStoredAttributes() {\n\t\tconst selectionParent = this.getFirstPosition().parent;\n\n\t\tif ( this.isCollapsed && selectionParent.isEmpty ) {\n\t\t\tfor ( const key of selectionParent.getAttributeKeys() ) {\n\t\t\t\tif ( key.startsWith( storePrefix ) ) {\n\t\t\t\t\tconst realKey = key.substr( storePrefix.length );\n\n\t\t\t\t\tyield [ realKey, selectionParent.getAttribute( key ) ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Checks model text nodes that are closest to the selection's first position and returns attributes of first\n\t// found element. If there are no text nodes in selection's first position parent, it returns selection\n\t// attributes stored in that parent.\n\t//\n\t// @private\n\t// @returns {Iterable.<*>} Collection of attributes.\n\t_getSurroundingAttributes() {\n\t\tconst position = this.getFirstPosition();\n\t\tconst schema = this._model.schema;\n\n\t\tlet attrs = null;\n\n\t\tif ( !this.isCollapsed ) {\n\t\t\t// 1. If selection is a range...\n\t\t\tconst range = this.getFirstRange();\n\n\t\t\t// ...look for a first character node in that range and take attributes from it.\n\t\t\tfor ( const value of range ) {\n\t\t\t\t// If the item is an object, we don't want to get attributes from its children.\n\t\t\t\tif ( value.item.is( 'element' ) && schema.isObject( value.item ) ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tif ( value.type == 'text' ) {\n\t\t\t\t\tattrs = value.item.getAttributes();\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\t// 2. If the selection is a caret or the range does not contain a character node...\n\n\t\t\tconst nodeBefore = position.textNode ? position.textNode : position.nodeBefore;\n\t\t\tconst nodeAfter = position.textNode ? position.textNode : position.nodeAfter;\n\n\t\t\t// When gravity is overridden then don't take node before into consideration.\n\t\t\tif ( !this.isGravityOverridden ) {\n\t\t\t\t// ...look at the node before caret and take attributes from it if it is a character node.\n\t\t\t\tattrs = getAttrsIfCharacter( nodeBefore );\n\t\t\t}\n\n\t\t\t// 3. If not, look at the node after caret...\n\t\t\tif ( !attrs ) {\n\t\t\t\tattrs = getAttrsIfCharacter( nodeAfter );\n\t\t\t}\n\n\t\t\t// 4. If not, try to find the first character on the left, that is in the same node.\n\t\t\t// When gravity is overridden then don't take node before into consideration.\n\t\t\tif ( !this.isGravityOverridden && !attrs ) {\n\t\t\t\tlet node = nodeBefore;\n\n\t\t\t\twhile ( node && !attrs ) {\n\t\t\t\t\tnode = node.previousSibling;\n\t\t\t\t\tattrs = getAttrsIfCharacter( node );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// 5. If not found, try to find the first character on the right, that is in the same node.\n\t\t\tif ( !attrs ) {\n\t\t\t\tlet node = nodeAfter;\n\n\t\t\t\twhile ( node && !attrs ) {\n\t\t\t\t\tnode = node.nextSibling;\n\t\t\t\t\tattrs = getAttrsIfCharacter( node );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// 6. If not found, selection should retrieve attributes from parent.\n\t\t\tif ( !attrs ) {\n\t\t\t\tattrs = this._getStoredAttributes();\n\t\t\t}\n\t\t}\n\n\t\treturn attrs;\n\t}\n\n\t// Fixes a selection range after it ends up in graveyard root.\n\t//\n\t// @private\n\t// @param {module:engine/model/liverange~LiveRange} liveRange The range from selection, that ended up in the graveyard root.\n\t// @param {module:engine/model/position~Position} removedRangeStart Start position of a range which was removed.\n\t_fixGraveyardSelection( liveRange, removedRangeStart ) {\n\t\t// The start of the removed range is the closest position to the `liveRange` - the original selection range.\n\t\t// This is a good candidate for a fixed selection range.\n\t\tconst positionCandidate = removedRangeStart.clone();\n\n\t\t// Find a range that is a correct selection range and is closest to the start of removed range.\n\t\tconst selectionRange = this._model.schema.getNearestSelectionRange( positionCandidate );\n\n\t\t// Remove the old selection range before preparing and adding new selection range. This order is important,\n\t\t// because new range, in some cases, may intersect with old range (it depends on `getNearestSelectionRange()` result).\n\t\tconst index = this._ranges.indexOf( liveRange );\n\t\tthis._ranges.splice( index, 1 );\n\t\tliveRange.detach();\n\n\t\t// If nearest valid selection range has been found - add it in the place of old range.\n\t\tif ( selectionRange ) {\n\t\t\t// Check the range, convert it to live range, bind events, etc.\n\t\t\tconst newRange = this._prepareRange( selectionRange );\n\n\t\t\t// Add new range in the place of old range.\n\t\t\tthis._ranges.splice( index, 0, newRange );\n\t\t}\n\t\t// If nearest valid selection range cannot be found - just removing the old range is fine.\n\t}\n}\n\n// Helper function for {@link module:engine/model/liveselection~LiveSelection#_updateAttributes}.\n//\n// It takes model item, checks whether it is a text node (or text proxy) and, if so, returns it's attributes. If not, returns `null`.\n//\n// @param {module:engine/model/item~Item|null} node\n// @returns {Boolean}\nfunction getAttrsIfCharacter( node ) {\n\tif ( node instanceof TextProxy || node instanceof Text ) {\n\t\treturn node.getAttributes();\n\t}\n\n\treturn null;\n}\n\n// Removes selection attributes from element which is not empty anymore.\n//\n// @private\n// @param {module:engine/model/model~Model} model\n// @param {module:engine/model/batch~Batch} batch\nfunction clearAttributesStoredInElement( model, batch ) {\n\tconst differ = model.document.differ;\n\n\tfor ( const entry of differ.getChanges() ) {\n\t\tif ( entry.type != 'insert' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst changeParent = entry.position.parent;\n\t\tconst isNoLongerEmpty = entry.length === changeParent.maxOffset;\n\n\t\tif ( isNoLongerEmpty ) {\n\t\t\tmodel.enqueueChange( batch, writer => {\n\t\t\t\tconst storedAttributes = Array.from( changeParent.getAttributeKeys() )\n\t\t\t\t\t.filter( key => key.startsWith( storePrefix ) );\n\n\t\t\t\tfor ( const key of storedAttributes ) {\n\t\t\t\t\twriter.removeAttribute( key, changeParent );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/conversionhelpers\n */\n\n/**\n * Base class for conversion helpers.\n */\nexport default class ConversionHelpers {\n\t/**\n\t * Creates a conversion helpers instance.\n\t *\n\t * @param {Array.<module:engine/conversion/downcastdispatcher~DowncastDispatcher|\n\t * module:engine/conversion/upcastdispatcher~UpcastDispatcher>} dispatchers\n\t */\n\tconstructor( dispatchers ) {\n\t\tthis._dispatchers = dispatchers;\n\t}\n\n\t/**\n\t * Registers a conversion helper.\n\t *\n\t * **Note**: See full usage example in the `{@link module:engine/conversion/conversion~Conversion#for conversion.for()}`\n\t * method description.\n\t *\n\t * @param {Function} conversionHelper The function to be called on event.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers|module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tadd( conversionHelper ) {\n\t\tfor ( const dispatcher of this._dispatchers ) {\n\t\t\tconversionHelper( dispatcher );\n\t\t}\n\n\t\treturn this;\n\t}\n}\n","import baseClone from './_baseClone.js';\n\n/** Used to compose bitmasks for cloning. */\nvar CLONE_DEEP_FLAG = 1,\n CLONE_SYMBOLS_FLAG = 4;\n\n/**\n * This method is like `_.clone` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @returns {*} Returns the deep cloned value.\n * @see _.clone\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var deep = _.cloneDeep(objects);\n * console.log(deep[0] === objects[0]);\n * // => false\n */\nfunction cloneDeep(value) {\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n}\n\nexport default cloneDeep;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Contains downcast (model-to-view) converters for {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}.\n *\n * @module engine/conversion/downcasthelpers\n */\n\nimport ModelRange from '../model/range';\nimport ModelSelection from '../model/selection';\nimport ModelElement from '../model/element';\n\nimport ViewAttributeElement from '../view/attributeelement';\nimport DocumentSelection from '../model/documentselection';\nimport ConversionHelpers from './conversionhelpers';\n\nimport { cloneDeep } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Downcast conversion helper functions.\n *\n * @extends module:engine/conversion/conversionhelpers~ConversionHelpers\n */\nexport default class DowncastHelpers extends ConversionHelpers {\n\t/**\n\t * Model element to view element conversion helper.\n\t *\n\t * This conversion results in creating a view element. For example, model `<paragraph>Foo</paragraph>` becomes `<p>Foo</p>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'p'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tview: 'div',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'fancyParagraph',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).elementToElement( {\n\t *\t\t\tmodel: 'heading',\n\t *\t\t\tview: ( modelElement, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createContainerElement( 'h' + modelElement.getAttribute( 'level' ) )\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model element to convert.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n\t * that takes the model element and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n\t * as parameters and returns a view container element.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\telementToElement( config ) {\n\t\treturn this.add( downcastElementToElement( config ) );\n\t}\n\n\t/**\n\t * Model attribute to view element conversion helper.\n\t *\n\t * This conversion results in wrapping view nodes with a view attribute element. For example, a model text node with\n\t * `\"Foo\"` as data and the `bold` attribute becomes `<strong>Foo</strong>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'strong'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: 'b',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'invert',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: [ 'font-light', 'bg-dark' ]\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalues: [ 'big', 'small' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tbig: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '1.2em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t},\n\t *\t\t\t\tsmall: {\n\t *\t\t\t\t\tname: 'span',\n\t *\t\t\t\t\tstyles: {\n\t *\t\t\t\t\t\t'font-size': '0.8em'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tview: ( modelAttributeValue, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createAttributeElement( 'span', {\n\t *\t\t\t\t\tstyle: 'font-weight:' + modelAttributeValue\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'color',\n\t *\t\t\t\tname: '$text'\n\t *\t\t\t},\n\t *\t\t\tview: ( modelAttributeValue, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createAttributeElement( 'span', {\n\t *\t\t\t\t\tstyle: 'color:' + modelAttributeValue\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values }` object. `values` is an array\n\t * of `String`s with possible values if the model attribute is an enumerable.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function|Object} config.view A view element definition or a function\n\t * that takes the model attribute value and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n\t * as parameters and returns a view attribute element. If `config.model.values` is\n\t * given, `config.view` should be an object assigning values from `config.model.values` to view element definitions or functions.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tattributeToElement( config ) {\n\t\treturn this.add( downcastAttributeToElement( config ) );\n\t}\n\n\t/**\n\t * Model attribute to view attribute conversion helper.\n\t *\n\t * This conversion results in adding an attribute to a view node, basing on an attribute from a model node. For example,\n\t * `<image src='foo.jpg'></image>` is converted to `<img src='foo.jpg'></img>`.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tview: 'src'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tview: 'href',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'image',\n\t *\t\t\t\tkey: 'source'\n\t *\t\t\t},\n\t *\t\t\tview: 'src'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: {\n\t *\t\t\t\tname: 'styled',\n\t *\t\t\t\tvalues: [ 'dark', 'light' ]\n\t *\t\t\t},\n\t *\t\t\tview: {\n\t *\t\t\t\tdark: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'styled', 'styled-dark' ]\n\t *\t\t\t\t},\n\t *\t\t\t\tlight: {\n\t *\t\t\t\t\tkey: 'class',\n\t *\t\t\t\t\tvalue: [ 'styled', 'styled-light' ]\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'styled',\n\t *\t\t\tview: modelAttributeValue => ( { key: 'class', value: 'styled-' + modelAttributeValue } )\n\t *\t\t} );\n\t *\n\t * *Note:* Downcasting to a style property requires providing `value` as an object:\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t *\t\t\tmodel: 'lineHeight',\n\t *\t\t\tview: modelAttributeValue => ( {\n\t *\t\t\t\tkey: 'style',\n\t *\t\t\t\tvalue: {\n\t *\t\t\t\t\t'line-height': modelAttributeValue,\n\t *\t\t\t\t\t'border-bottom': '1px dotted #ba2'\n\t *\t\t\t\t}\n\t *\t\t\t} )\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values, [ name ] }` object describing\n\t * the attribute key, possible values and, optionally, an element name to convert from.\n\t * @param {String|Object|Function} config.view A view attribute key, or a `{ key, value }` object or a function that takes\n\t * the model attribute value and returns a `{ key, value }` object. If `key` is `'class'`, `value` can be a `String` or an\n\t * array of `String`s. If `key` is `'style'`, `value` is an object with key-value pairs. In other cases, `value` is a `String`.\n\t * If `config.model.values` is set, `config.view` should be an object assigning values from `config.model.values` to\n\t * `{ key, value }` objects or a functions.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tattributeToAttribute( config ) {\n\t\treturn this.add( downcastAttributeToAttribute( config ) );\n\t}\n\n\t/**\n\t * Model marker to view element conversion helper.\n\t *\n\t * This conversion results in creating a view element on the boundaries of the converted marker. If the converted marker\n\t * is collapsed, only one element is created. For example, model marker set like this: `<paragraph>F[oo b]ar</paragraph>`\n\t * becomes `<p>F<span data-marker=\"search\"></span>oo b<span data-marker=\"search\"></span>ar</p>` in the view.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: 'marker-search'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: 'search-result',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tattributes: {\n\t *\t\t\t\t\t'data-marker': 'search'\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToElement( {\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tview: ( markerData, viewWriter ) => {\n\t *\t\t\t\treturn viewWriter.createUIElement( 'span', {\n\t *\t\t\t\t\t'data-marker': 'search',\n\t *\t\t\t\t\t'data-start': markerData.isOpening\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * If a function is passed as the `config.view` parameter, it will be used to generate both boundary elements. The function\n\t * receives the `data` object as a parameter and should return an instance of the\n\t * {@link module:engine/view/uielement~UIElement view UI element}. The `data` object and\n\t * {@link module:engine/conversion/downcastdispatcher~DowncastConversionApi `conversionApi`} are passed from\n\t * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}. Additionally,\n\t * the `data.isOpening` parameter is passed, which is set to `true` for the marker start boundary element, and `false` to\n\t * the marker end boundary element.\n\t *\n\t * This kind of conversion is useful for saving data into the database, so it should be used in the data conversion pipeline.\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #markerToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model marker (or model marker group) to convert.\n\t * @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n\t * that takes the model marker data as a parameter and returns a view UI element.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tmarkerToElement( config ) {\n\t\treturn this.add( downcastMarkerToElement( config ) );\n\t}\n\n\t/**\n\t * Model marker to highlight conversion helper.\n\t *\n\t * This conversion results in creating a highlight on view nodes. For this kind of conversion,\n\t * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor} should be provided.\n\t *\n\t * For text nodes, a `<span>` {@link module:engine/view/attributeelement~AttributeElement} is created and it wraps all text nodes\n\t * in the converted marker range. For example, a model marker set like this: `<paragraph>F[oo b]ar</paragraph>` becomes\n\t * `<p>F<span class=\"comment\">oo b</span>ar</p>` in the view.\n\t *\n\t * {@link module:engine/view/containerelement~ContainerElement} may provide a custom way of handling highlight. Most often,\n\t * the element itself is given classes and attributes described in the highlight descriptor (instead of being wrapped in `<span>`).\n\t * For example, a model marker set like this: `[<image src=\"foo.jpg\"></image>]` becomes `<img src=\"foo.jpg\" class=\"comment\"></img>`\n\t * in the view.\n\t *\n\t * For container elements, the conversion is two-step. While the converter processes the highlight descriptor and passes it\n\t * to a container element, it is the container element instance itself that applies values from the highlight descriptor.\n\t * So, in a sense, the converter takes care of stating what should be applied on what, while the element decides how to apply that.\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( { model: 'comment', view: { classes: 'comment' } } );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( {\n\t *\t\t\tmodel: 'comment',\n\t *\t\t\tview: { classes: 'new-comment' },\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'downcast' ).markerToHighlight( {\n\t *\t\t\tmodel: 'comment',\n\t *\t\t\tview: data => {\n\t *\t\t\t\t// Assuming that the marker name is in a form of comment:commentType.\n\t *\t\t\t\tconst commentType = data.markerName.split( ':' )[ 1 ];\n\t *\n\t *\t\t\t\treturn {\n\t *\t\t\t\t\tclasses: [ 'comment', 'comment-' + commentType ]\n\t *\t\t\t\t};\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * If a function is passed as the `config.view` parameter, it will be used to generate the highlight descriptor. The function\n\t * receives the `data` object as a parameter and should return a\n\t * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor highlight descriptor}.\n\t * The `data` object properties are passed from {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker}.\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #markerToHighlight\n\t * @param {Object} config Conversion configuration.\n\t * @param {String} config.model The name of the model marker (or model marker group) to convert.\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} config.view A highlight descriptor\n\t * that will be used for highlighting or a function that takes the model marker data as a parameter and returns a highlight descriptor.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/downcasthelpers~DowncastHelpers}\n\t */\n\tmarkerToHighlight( config ) {\n\t\treturn this.add( downcastMarkerToHighlight( config ) );\n\t}\n}\n\n/**\n * Function factory that creates a default downcast converter for text insertion changes.\n *\n * The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n *\n *\t\tmodelDispatcher.on( 'insert:$text', insertText() );\n *\n * @returns {Function} Insert text event converter.\n */\nexport function insertText() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\t\tconst viewText = viewWriter.createText( data.item.data );\n\n\t\tviewWriter.insert( viewPosition, viewText );\n\t};\n}\n\n/**\n * Function factory that creates a default downcast converter for node remove changes.\n *\n *\t\tmodelDispatcher.on( 'remove', remove() );\n *\n * @returns {Function} Remove event converter.\n */\nexport function remove() {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Find view range start position by mapping model position at which the remove happened.\n\t\tconst viewStart = conversionApi.mapper.toViewPosition( data.position );\n\n\t\tconst modelEnd = data.position.getShiftedBy( data.length );\n\t\tconst viewEnd = conversionApi.mapper.toViewPosition( modelEnd, { isPhantom: true } );\n\n\t\tconst viewRange = conversionApi.writer.createRange( viewStart, viewEnd );\n\n\t\t// Trim the range to remove in case some UI elements are on the view range boundaries.\n\t\tconst removed = conversionApi.writer.remove( viewRange.getTrimmed() );\n\n\t\t// After the range is removed, unbind all view elements from the model.\n\t\t// Range inside view document fragment is used to unbind deeply.\n\t\tfor ( const child of conversionApi.writer.createRangeIn( removed ).getItems() ) {\n\t\t\tconversionApi.mapper.unbindViewElement( child );\n\t\t}\n\t};\n}\n\n/**\n * Creates a `<span>` {@link module:engine/view/attributeelement~AttributeElement view attribute element} from the information\n * provided by the {@link module:engine/conversion/downcasthelpers~HighlightDescriptor highlight descriptor} object. If a priority\n * is not provided in the descriptor, the default priority will be used.\n *\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n * @returns {module:engine/view/attributeelement~AttributeElement}\n */\nexport function createViewElementFromHighlightDescriptor( descriptor ) {\n\tconst viewElement = new ViewAttributeElement( 'span', descriptor.attributes );\n\n\tif ( descriptor.classes ) {\n\t\tviewElement._addClass( descriptor.classes );\n\t}\n\n\tif ( descriptor.priority ) {\n\t\tviewElement._priority = descriptor.priority;\n\t}\n\n\tviewElement._id = descriptor.id;\n\n\treturn viewElement;\n}\n\n/**\n * Function factory that creates a converter which converts a non-collapsed {@link module:engine/model/selection~Selection model selection}\n * to a {@link module:engine/view/documentselection~DocumentSelection view selection}. The converter consumes appropriate\n * value from the `consumable` object and maps model positions from the selection to view positions.\n *\n *\t\tmodelDispatcher.on( 'selection', convertRangeSelection() );\n *\n * @returns {Function} Selection converter.\n */\nexport function convertRangeSelection() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst selection = data.selection;\n\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( selection, 'selection' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( const range of selection.getRanges() ) {\n\t\t\tconst viewRange = conversionApi.mapper.toViewRange( range );\n\t\t\tviewRanges.push( viewRange );\n\t\t}\n\n\t\tconversionApi.writer.setSelection( viewRanges, { backward: selection.isBackward } );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts a collapsed {@link module:engine/model/selection~Selection model selection} to\n * a {@link module:engine/view/documentselection~DocumentSelection view selection}. The converter consumes appropriate\n * value from the `consumable` object, maps the model selection position to the view position and breaks\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} at the selection position.\n *\n *\t\tmodelDispatcher.on( 'selection', convertCollapsedSelection() );\n *\n * An example of the view state before and after converting the collapsed selection:\n *\n *\t\t <p><strong>f^oo<strong>bar</p>\n *\t\t-> <p><strong>f</strong>^<strong>oo</strong>bar</p>\n *\n * By breaking attribute elements like `<strong>`, the selection is in a correct element. Then, when the selection attribute is\n * converted, broken attributes might be merged again, or the position where the selection is may be wrapped\n * with different, appropriate attribute elements.\n *\n * See also {@link module:engine/conversion/downcasthelpers~clearAttributes} which does a clean-up\n * by merging attributes.\n *\n * @returns {Function} Selection converter.\n */\nexport function convertCollapsedSelection() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst selection = data.selection;\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( selection, 'selection' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst modelPosition = selection.getFirstPosition();\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( modelPosition );\n\t\tconst brokenPosition = viewWriter.breakAttributes( viewPosition );\n\n\t\tviewWriter.setSelection( brokenPosition );\n\t};\n}\n\n/**\n * Function factory that creates a converter which clears artifacts after the previous\n * {@link module:engine/model/selection~Selection model selection} conversion. It removes all empty\n * {@link module:engine/view/attributeelement~AttributeElement view attribute elements} and merges sibling attributes at all start and end\n * positions of all ranges.\n *\n *\t\t <p><strong>^</strong></p>\n *\t\t-> <p>^</p>\n *\n *\t\t <p><strong>foo</strong>^<strong>bar</strong>bar</p>\n *\t\t-> <p><strong>foo^bar<strong>bar</p>\n *\n *\t\t <p><strong>foo</strong><em>^</em><strong>bar</strong>bar</p>\n *\t\t-> <p><strong>foo^bar<strong>bar</p>\n *\n * This listener should be assigned before any converter for the new selection:\n *\n *\t\tmodelDispatcher.on( 'selection', clearAttributes() );\n *\n * See {@link module:engine/conversion/downcasthelpers~convertCollapsedSelection}\n * which does the opposite by breaking attributes in the selection position.\n *\n * @returns {Function} Selection converter.\n */\nexport function clearAttributes() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tfor ( const range of viewSelection.getRanges() ) {\n\t\t\t// Not collapsed selection should not have artifacts.\n\t\t\tif ( range.isCollapsed ) {\n\t\t\t\t// Position might be in the node removed by the view writer.\n\t\t\t\tif ( range.end.parent.document ) {\n\t\t\t\t\tconversionApi.writer.mergeAttributes( range.start );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tviewWriter.setSelection( null );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts set/change/remove attribute changes from the model to the view.\n * It can also be used to convert selection attributes. In that case, an empty attribute element will be created and the\n * selection will be put inside it.\n *\n * Attributes from the model are converted to a view element that will be wrapping these view nodes that are bound to\n * model elements having the given attribute. This is useful for attributes like `bold` that may be set on text nodes in the model\n * but are represented as an element in the view:\n *\n *\t\t[paragraph] MODEL ====> VIEW <p>\n *\t\t\t|- a {bold: true} |- <b>\n *\t\t\t|- b {bold: true} | |- ab\n *\t\t\t|- c |- c\n *\n * Passed `Function` will be provided with the attribute value and then all the parameters of the\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute `attribute` event}.\n * It is expected that the function returns an {@link module:engine/view/element~Element}.\n * The result of the function will be the wrapping element.\n * When the provided `Function` does not return any element, no conversion will take place.\n *\n * The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n *\n *\t\tmodelDispatcher.on( 'attribute:bold', wrap( ( modelAttributeValue, viewWriter ) => {\n *\t\t\treturn viewWriter.createAttributeElement( 'strong' );\n *\t\t} );\n *\n * @protected\n * @param {Function} elementCreator Function returning a view element that will be used for wrapping.\n * @returns {Function} Set/change attribute converter.\n */\nexport function wrap( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Recreate current wrapping node. It will be used to unwrap view range if the attribute value has changed\n\t\t// or the attribute was removed.\n\t\tconst oldViewElement = elementCreator( data.attributeOldValue, conversionApi.writer );\n\n\t\t// Create node to wrap with.\n\t\tconst newViewElement = elementCreator( data.attributeNewValue, conversionApi.writer );\n\n\t\tif ( !oldViewElement && !newViewElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tif ( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) {\n\t\t\t// Selection attribute conversion.\n\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), newViewElement );\n\t\t} else {\n\t\t\t// Node attribute conversion.\n\t\t\tlet viewRange = conversionApi.mapper.toViewRange( data.range );\n\n\t\t\t// First, unwrap the range from current wrapper.\n\t\t\tif ( data.attributeOldValue !== null && oldViewElement ) {\n\t\t\t\tviewRange = viewWriter.unwrap( viewRange, oldViewElement );\n\t\t\t}\n\n\t\t\tif ( data.attributeNewValue !== null && newViewElement ) {\n\t\t\t\tviewWriter.wrap( viewRange, newViewElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts node insertion changes from the model to the view.\n * The function passed will be provided with all the parameters of the dispatcher's\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert `insert` event}.\n * It is expected that the function returns an {@link module:engine/view/element~Element}.\n * The result of the function will be inserted into the view.\n *\n * The converter automatically consumes the corresponding value from the consumables list, stops the event (see\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}) and binds the model and view elements.\n *\n *\t\tdowncastDispatcher.on(\n *\t\t\t'insert:myElem',\n *\t\t\tinsertElement( ( modelItem, viewWriter ) => {\n *\t\t\t\tconst text = viewWriter.createText( 'myText' );\n *\t\t\t\tconst myElem = viewWriter.createElement( 'myElem', { myAttr: 'my-' + modelItem.getAttribute( 'myAttr' ) }, text );\n *\n *\t\t\t\t// Do something fancy with `myElem` using `modelItem` or other parameters.\n *\n *\t\t\t\treturn myElem;\n *\t\t\t}\n *\t\t) );\n *\n * @protected\n * @param {Function} elementCreator Function returning a view element, which will be inserted.\n * @returns {Function} Insert element event converter.\n */\nexport function insertElement( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewElement = elementCreator( data.item, conversionApi.writer );\n\n\t\tif ( !viewElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconversionApi.mapper.bindElements( data.item, viewElement );\n\t\tconversionApi.writer.insert( viewPosition, viewElement );\n\t};\n}\n\n/**\n * Function factory that creates a converter which converts marker adding change to the\n * {@link module:engine/view/uielement~UIElement view UI element}.\n *\n * The view UI element that will be added to the view depends on the passed parameter. See {@link ~insertElement}.\n * In case of a non-collapsed range, the UI element will not wrap nodes but separate elements will be placed at the beginning\n * and at the end of the range.\n *\n * This converter binds created UI elements with the marker name using {@link module:engine/conversion/mapper~Mapper#bindElementToMarker}.\n *\n * @protected\n * @param {module:engine/view/uielement~UIElement|Function} elementCreator A view UI element or a function returning the view element\n * that will be inserted.\n * @returns {Function} Insert element event converter.\n */\nexport function insertUIElement( elementCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Create two view elements. One will be inserted at the beginning of marker, one at the end.\n\t\t// If marker is collapsed, only \"opening\" element will be inserted.\n\t\tdata.isOpening = true;\n\t\tconst viewStartElement = elementCreator( data, conversionApi.writer );\n\n\t\tdata.isOpening = false;\n\t\tconst viewEndElement = elementCreator( data, conversionApi.writer );\n\n\t\tif ( !viewStartElement || !viewEndElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst markerRange = data.markerRange;\n\n\t\t// Marker that is collapsed has consumable build differently that non-collapsed one.\n\t\t// For more information see `addMarker` event description.\n\t\t// If marker's range is collapsed - check if it can be consumed.\n\t\tif ( markerRange.isCollapsed && !conversionApi.consumable.consume( markerRange, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If marker's range is not collapsed - consume all items inside.\n\t\tfor ( const value of markerRange ) {\n\t\t\tif ( !conversionApi.consumable.consume( value.item, evt.name ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tconst mapper = conversionApi.mapper;\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// Add \"opening\" element.\n\t\tviewWriter.insert( mapper.toViewPosition( markerRange.start ), viewStartElement );\n\t\tconversionApi.mapper.bindElementToMarker( viewStartElement, data.markerName );\n\n\t\t// Add \"closing\" element only if range is not collapsed.\n\t\tif ( !markerRange.isCollapsed ) {\n\t\t\tviewWriter.insert( mapper.toViewPosition( markerRange.end ), viewEndElement );\n\t\t\tconversionApi.mapper.bindElementToMarker( viewEndElement, data.markerName );\n\t\t}\n\n\t\tevt.stop();\n\t};\n}\n\n// Function factory that returns a default downcast converter for removing a {@link module:engine/view/uielement~UIElement UI element}\n// basing on marker remove change.\n//\n// This converter unbinds elements from the marker name.\n//\n// @returns {Function} Removed UI element converter.\nfunction removeUIElement() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst elements = conversionApi.mapper.markerNameToElements( data.markerName );\n\n\t\tif ( !elements ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const element of elements ) {\n\t\t\tconversionApi.mapper.unbindElementFromMarkerName( element, data.markerName );\n\t\t\tconversionApi.writer.clear( conversionApi.writer.createRangeOn( element ), element );\n\t\t}\n\n\t\tconversionApi.writer.clearClonedElementsGroup( data.markerName );\n\n\t\tevt.stop();\n\t};\n}\n\n// Function factory that creates a converter which converts set/change/remove attribute changes from the model to the view.\n//\n// Attributes from the model are converted to the view element attributes in the view. You may provide a custom function to generate\n// a key-value attribute pair to add/change/remove. If not provided, model attributes will be converted to view element\n// attributes on a one-to-one basis.\n//\n// *Note:** The provided attribute creator should always return the same `key` for a given attribute from the model.\n//\n// The converter automatically consumes the corresponding value from the consumables list and stops the event (see\n// {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher}).\n//\n//\t\tmodelDispatcher.on( 'attribute:customAttr:myElem', changeAttribute( ( value, data ) => {\n//\t\t\t// Change attribute key from `customAttr` to `class` in the view.\n//\t\t\tconst key = 'class';\n//\t\t\tlet value = data.attributeNewValue;\n//\n//\t\t\t// Force attribute value to 'empty' if the model element is empty.\n//\t\t\tif ( data.item.childCount === 0 ) {\n//\t\t\t\tvalue = 'empty';\n//\t\t\t}\n//\n//\t\t\t// Return the key-value pair.\n//\t\t\treturn { key, value };\n//\t\t} ) );\n//\n// @param {Function} [attributeCreator] Function returning an object with two properties: `key` and `value`, which\n// represent the attribute key and attribute value to be set on a {@link module:engine/view/element~Element view element}.\n// The function is passed the model attribute value as the first parameter and additional data about the change as the second parameter.\n// @returns {Function} Set/change attribute converter.\nfunction changeAttribute( attributeCreator ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst oldAttribute = attributeCreator( data.attributeOldValue, data );\n\t\tconst newAttribute = attributeCreator( data.attributeNewValue, data );\n\n\t\tif ( !oldAttribute && !newAttribute ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// If model item cannot be mapped to a view element, it means item is not an `Element` instance but a `TextProxy` node.\n\t\t// Only elements can have attributes in a view so do not proceed for anything else (#1587).\n\t\tif ( !viewElement ) {\n\t\t\t/**\n\t\t\t * This error occurs when a {@link module:engine/model/textproxy~TextProxy text node's} attribute is to be downcasted\n\t\t\t * by {@link module:engine/conversion/conversion~Conversion#attributeToAttribute `Attribute to Attribute converter`}.\n\t\t\t * In most cases it is caused by converters misconfiguration when only \"generic\" converter is defined:\n\t\t\t *\n\t\t\t *\t\teditor.conversion.for( 'downcast' ).attributeToAttribute( {\n\t\t\t *\t\t\tmodel: 'attribute-name',\n\t\t\t *\t\t\tview: 'attribute-name'\n\t\t\t *\t\t} ) );\n\t\t\t *\n\t\t\t * and given attribute is used on text node, for example:\n\t\t\t *\n\t\t\t *\t\tmodel.change( writer => {\n\t\t\t *\t\t\twriter.insertText( 'Foo', { 'attribute-name': 'bar' }, parent, 0 );\n\t\t\t *\t\t} );\n\t\t\t *\n\t\t\t * In such cases, to convert the same attribute for both {@link module:engine/model/element~Element}\n\t\t\t * and {@link module:engine/model/textproxy~TextProxy `Text`} nodes, text specific\n\t\t\t * {@link module:engine/conversion/conversion~Conversion#attributeToElement `Attribute to Element converter`}\n\t\t\t * with higher {@link module:utils/priorities~PriorityString priority} must also be defined:\n\t\t\t *\n\t\t\t *\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t\t\t *\t\t\tmodel: {\n\t\t\t *\t\t\t\tkey: 'attribute-name',\n\t\t\t *\t\t\t\tname: '$text'\n\t\t\t *\t\t\t},\n\t\t\t *\t\t\tview: ( value, writer ) => {\n\t\t\t *\t\t\t\treturn writer.createAttributeElement( 'span', { 'attribute-name': value } );\n\t\t\t *\t\t\t},\n\t\t\t *\t\t\tconverterPriority: 'high'\n\t\t\t *\t\t} ) );\n\t\t\t *\n\t\t\t * @error conversion-attribute-to-attribute-on-text\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'conversion-attribute-to-attribute-on-text: ' +\n\t\t\t\t'Trying to convert text node\\'s attribute with attribute-to-attribute converter.',\n\t\t\t\t[ data, conversionApi ]\n\t\t\t);\n\t\t}\n\n\t\t// First remove the old attribute if there was one.\n\t\tif ( data.attributeOldValue !== null && oldAttribute ) {\n\t\t\tif ( oldAttribute.key == 'class' ) {\n\t\t\t\tconst classes = Array.isArray( oldAttribute.value ) ? oldAttribute.value : [ oldAttribute.value ];\n\n\t\t\t\tfor ( const className of classes ) {\n\t\t\t\t\tviewWriter.removeClass( className, viewElement );\n\t\t\t\t}\n\t\t\t} else if ( oldAttribute.key == 'style' ) {\n\t\t\t\tconst keys = Object.keys( oldAttribute.value );\n\n\t\t\t\tfor ( const key of keys ) {\n\t\t\t\t\tviewWriter.removeStyle( key, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tviewWriter.removeAttribute( oldAttribute.key, viewElement );\n\t\t\t}\n\t\t}\n\n\t\t// Then set the new attribute.\n\t\tif ( data.attributeNewValue !== null && newAttribute ) {\n\t\t\tif ( newAttribute.key == 'class' ) {\n\t\t\t\tconst classes = Array.isArray( newAttribute.value ) ? newAttribute.value : [ newAttribute.value ];\n\n\t\t\t\tfor ( const className of classes ) {\n\t\t\t\t\tviewWriter.addClass( className, viewElement );\n\t\t\t\t}\n\t\t\t} else if ( newAttribute.key == 'style' ) {\n\t\t\t\tconst keys = Object.keys( newAttribute.value );\n\n\t\t\t\tfor ( const key of keys ) {\n\t\t\t\t\tviewWriter.setStyle( key, newAttribute.value[ key ], viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tviewWriter.setAttribute( newAttribute.key, newAttribute.value, viewElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Function factory that creates a converter which converts the text inside marker's range. The converter wraps the text with\n// {@link module:engine/view/attributeelement~AttributeElement} created from the provided descriptor.\n// See {link module:engine/conversion/downcasthelpers~createViewElementFromHighlightDescriptor}.\n//\n// It can also be used to convert the selection that is inside a marker. In that case, an empty attribute element will be\n// created and the selection will be put inside it.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter binds the created {@link module:engine/view/attributeelement~AttributeElement attribute elemens} with the marker name\n// using the {@link module:engine/conversion/mapper~Mapper#bindElementToMarker} method.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction highlightText( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.item ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) && !data.item.is( 'textProxy' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = createViewElementFromHighlightDescriptor( descriptor );\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\tif ( data.item instanceof ModelSelection || data.item instanceof DocumentSelection ) {\n\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), viewElement, viewSelection );\n\t\t} else {\n\t\t\tconst viewRange = conversionApi.mapper.toViewRange( data.range );\n\t\t\tconst rangeAfterWrap = viewWriter.wrap( viewRange, viewElement );\n\n\t\t\tfor ( const element of rangeAfterWrap.getItems() ) {\n\t\t\t\tif ( element.is( 'attributeElement' ) && element.isSimilar( viewElement ) ) {\n\t\t\t\t\tconversionApi.mapper.bindElementToMarker( element, data.markerName );\n\n\t\t\t\t\t// One attribute element is enough, because all of them are bound together by the view writer.\n\t\t\t\t\t// Mapper uses this binding to get all the elements no matter how many of them are registered in the mapper.\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Converter function factory. It creates a function which applies the marker's highlight to an element inside the marker's range.\n//\n// The converter checks if an element has the `addHighlight` function stored as a\n// {@link module:engine/view/element~Element#_setCustomProperty custom property} and, if so, uses it to apply the highlight.\n// In such case the converter will consume all element's children, assuming that they were handled by the element itself.\n//\n// When the `addHighlight` custom property is not present, the element is not converted in any special way.\n// This means that converters will proceed to convert the element's child nodes.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter binds altered {@link module:engine/view/containerelement~ContainerElement container elements} with the marker name using\n// the {@link module:engine/conversion/mapper~Mapper#bindElementToMarker} method.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction highlightElement( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.item ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !( data.item instanceof ModelElement ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !conversionApi.consumable.test( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\n\t\tif ( viewElement && viewElement.getCustomProperty( 'addHighlight' ) ) {\n\t\t\t// Consume element itself.\n\t\t\tconversionApi.consumable.consume( data.item, evt.name );\n\n\t\t\t// Consume all children nodes.\n\t\t\tfor ( const value of ModelRange._createIn( data.item ) ) {\n\t\t\t\tconversionApi.consumable.consume( value.item, evt.name );\n\t\t\t}\n\n\t\t\tviewElement.getCustomProperty( 'addHighlight' )( viewElement, descriptor, conversionApi.writer );\n\n\t\t\tconversionApi.mapper.bindElementToMarker( viewElement, data.markerName );\n\t\t}\n\t};\n}\n\n// Function factory that creates a converter which converts the removing model marker to the view.\n//\n// Both text nodes and elements are handled by this converter but they are handled a bit differently.\n//\n// Text nodes are unwrapped using the {@link module:engine/view/attributeelement~AttributeElement attribute element} created from the\n// provided highlight descriptor. See {link module:engine/conversion/downcasthelpers~HighlightDescriptor}.\n//\n// For elements, the converter checks if an element has the `removeHighlight` function stored as a\n// {@link module:engine/view/element~Element#_setCustomProperty custom property}. If so, it uses it to remove the highlight.\n// In such case, the children of that element will not be converted.\n//\n// When `removeHighlight` is not present, the element is not converted in any special way.\n// The converter will proceed to convert the element's child nodes instead.\n//\n// If the highlight descriptor does not provide the `priority` property, `10` will be used.\n//\n// If the highlight descriptor does not provide the `id` property, the name of the marker will be used.\n//\n// This converter unbinds elements from the marker name.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} highlightDescriptor\n// @returns {Function}\nfunction removeHighlight( highlightDescriptor ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// This conversion makes sense only for non-collapsed range.\n\t\tif ( data.markerRange.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst descriptor = prepareDescriptor( highlightDescriptor, data, conversionApi );\n\n\t\tif ( !descriptor ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// View element that will be used to unwrap `AttributeElement`s.\n\t\tconst viewHighlightElement = createViewElementFromHighlightDescriptor( descriptor );\n\n\t\t// Get all elements bound with given marker name.\n\t\tconst elements = conversionApi.mapper.markerNameToElements( data.markerName );\n\n\t\tif ( !elements ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const element of elements ) {\n\t\t\tconversionApi.mapper.unbindElementFromMarkerName( element, data.markerName );\n\n\t\t\tif ( element.is( 'attributeElement' ) ) {\n\t\t\t\tconversionApi.writer.unwrap( conversionApi.writer.createRangeOn( element ), viewHighlightElement );\n\t\t\t} else {\n\t\t\t\t// if element.is( 'containerElement' ).\n\t\t\t\telement.getCustomProperty( 'removeHighlight' )( element, descriptor.id, conversionApi.writer );\n\t\t\t}\n\t\t}\n\n\t\tconversionApi.writer.clearClonedElementsGroup( data.markerName );\n\n\t\tevt.stop();\n\t};\n}\n\n// Model element to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#elementToElement `.elementToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model element to convert.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n// that takes the model element and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n// as parameters and returns a view container element.\n// @returns {Function} Conversion helper.\nfunction downcastElementToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconfig.view = normalizeToElementConfig( config.view, 'container' );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'insert:' + config.model, insertElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model attribute to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#attributeToElement `.attributeToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values }` object. `values` is an array\n// of `String`s with possible values if the model attribute is an enumerable.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function|Object} config.view A view element definition or a function\n// that takes the model attribute value and {@link module:engine/view/downcastwriter~DowncastWriter view downcast writer}\n// as parameters and returns a view attribute element. If `config.model.values` is\n// given, `config.view` should be an object assigning values from `config.model.values` to view element definitions or functions.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastAttributeToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst modelKey = config.model.key ? config.model.key : config.model;\n\tlet eventName = 'attribute:' + modelKey;\n\n\tif ( config.model.name ) {\n\t\teventName += ':' + config.model.name;\n\t}\n\n\tif ( config.model.values ) {\n\t\tfor ( const modelValue of config.model.values ) {\n\t\t\tconfig.view[ modelValue ] = normalizeToElementConfig( config.view[ modelValue ], 'attribute' );\n\t\t}\n\t} else {\n\t\tconfig.view = normalizeToElementConfig( config.view, 'attribute' );\n\t}\n\n\tconst elementCreator = getFromAttributeCreator( config );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, wrap( elementCreator ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model attribute to view attribute conversion helper.\n//\n// See {@link ~DowncastHelpers#attributeToAttribute `.attributeToAttribute()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.model The key of the attribute to convert from or a `{ key, values, [ name ] }` object describing\n// the attribute key, possible values and, optionally, an element name to convert from.\n// @param {String|Object|Function} config.view A view attribute key, or a `{ key, value }` object or a function that takes\n// the model attribute value and returns a `{ key, value }` object. If `key` is `'class'`, `value` can be a `String` or an\n// array of `String`s. If `key` is `'style'`, `value` is an object with key-value pairs. In other cases, `value` is a `String`.\n// If `config.model.values` is set, `config.view` should be an object assigning values from `config.model.values` to\n// `{ key, value }` objects or a functions.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastAttributeToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst modelKey = config.model.key ? config.model.key : config.model;\n\tlet eventName = 'attribute:' + modelKey;\n\n\tif ( config.model.name ) {\n\t\teventName += ':' + config.model.name;\n\t}\n\n\tif ( config.model.values ) {\n\t\tfor ( const modelValue of config.model.values ) {\n\t\t\tconfig.view[ modelValue ] = normalizeToAttributeConfig( config.view[ modelValue ] );\n\t\t}\n\t} else {\n\t\tconfig.view = normalizeToAttributeConfig( config.view );\n\t}\n\n\tconst elementCreator = getFromAttributeCreator( config );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, changeAttribute( elementCreator ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model marker to view element conversion helper.\n//\n// See {@link ~DowncastHelpers#markerToElement `.markerToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model marker (or model marker group) to convert.\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} config.view A view element definition or a function\n// that takes the model marker data as a parameter and returns a view UI element.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastMarkerToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconfig.view = normalizeToElementConfig( config.view, 'ui' );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'addMarker:' + config.model, insertUIElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'removeMarker:' + config.model, removeUIElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Model marker to highlight conversion helper.\n//\n// See {@link ~DowncastHelpers#markerToElement `.markerToElement()` downcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String} config.model The name of the model marker (or model marker group) to convert.\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor|Function} config.view A highlight descriptor\n// that will be used for highlighting or a function that takes the model marker data as a parameter and returns a highlight descriptor.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction downcastMarkerToHighlight( config ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'addMarker:' + config.model, highlightText( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'addMarker:' + config.model, highlightElement( config.view ), { priority: config.converterPriority || 'normal' } );\n\t\tdispatcher.on( 'removeMarker:' + config.model, removeHighlight( config.view ), { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// Takes `config.view`, and if it is an {@link module:engine/view/elementdefinition~ElementDefinition}, converts it\n// to a function (because lower level converters accept only element creator functions).\n//\n// @param {module:engine/view/elementdefinition~ElementDefinition|Function} view View configuration.\n// @param {'container'|'attribute'|'ui'} viewElementType View element type to create.\n// @returns {Function} Element creator function to use in lower level converters.\nfunction normalizeToElementConfig( view, viewElementType ) {\n\tif ( typeof view == 'function' ) {\n\t\t// If `view` is already a function, don't do anything.\n\t\treturn view;\n\t}\n\n\treturn ( modelData, viewWriter ) => createViewElementFromDefinition( view, viewWriter, viewElementType );\n}\n\n// Creates a view element instance from the provided {@link module:engine/view/elementdefinition~ElementDefinition} and class.\n//\n// @param {module:engine/view/elementdefinition~ElementDefinition} viewElementDefinition\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @param {'container'|'attribute'|'ui'} viewElementType\n// @returns {module:engine/view/element~Element}\nfunction createViewElementFromDefinition( viewElementDefinition, viewWriter, viewElementType ) {\n\tif ( typeof viewElementDefinition == 'string' ) {\n\t\t// If `viewElementDefinition` is given as a `String`, normalize it to an object with `name` property.\n\t\tviewElementDefinition = { name: viewElementDefinition };\n\t}\n\n\tlet element;\n\tconst attributes = Object.assign( {}, viewElementDefinition.attributes );\n\n\tif ( viewElementType == 'container' ) {\n\t\telement = viewWriter.createContainerElement( viewElementDefinition.name, attributes );\n\t} else if ( viewElementType == 'attribute' ) {\n\t\tconst options = {\n\t\t\tpriority: viewElementDefinition.priority || ViewAttributeElement.DEFAULT_PRIORITY\n\t\t};\n\n\t\telement = viewWriter.createAttributeElement( viewElementDefinition.name, attributes, options );\n\t} else {\n\t\t// 'ui'.\n\t\telement = viewWriter.createUIElement( viewElementDefinition.name, attributes );\n\t}\n\n\tif ( viewElementDefinition.styles ) {\n\t\tconst keys = Object.keys( viewElementDefinition.styles );\n\n\t\tfor ( const key of keys ) {\n\t\t\tviewWriter.setStyle( key, viewElementDefinition.styles[ key ], element );\n\t\t}\n\t}\n\n\tif ( viewElementDefinition.classes ) {\n\t\tconst classes = viewElementDefinition.classes;\n\n\t\tif ( typeof classes == 'string' ) {\n\t\t\tviewWriter.addClass( classes, element );\n\t\t} else {\n\t\t\tfor ( const className of classes ) {\n\t\t\t\tviewWriter.addClass( className, element );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn element;\n}\n\nfunction getFromAttributeCreator( config ) {\n\tif ( config.model.values ) {\n\t\treturn ( modelAttributeValue, viewWriter ) => {\n\t\t\tconst view = config.view[ modelAttributeValue ];\n\n\t\t\tif ( view ) {\n\t\t\t\treturn view( modelAttributeValue, viewWriter );\n\t\t\t}\n\n\t\t\treturn null;\n\t\t};\n\t} else {\n\t\treturn config.view;\n\t}\n}\n\n// Takes the configuration, adds default parameters if they do not exist and normalizes other parameters to be used in downcast converters\n// for generating a view attribute.\n//\n// @param {Object} view View configuration.\nfunction normalizeToAttributeConfig( view ) {\n\tif ( typeof view == 'string' ) {\n\t\treturn modelAttributeValue => ( { key: view, value: modelAttributeValue } );\n\t} else if ( typeof view == 'object' ) {\n\t\t// { key, value, ... }\n\t\tif ( view.value ) {\n\t\t\treturn () => view;\n\t\t}\n\t\t// { key, ... }\n\t\telse {\n\t\t\treturn modelAttributeValue => ( { key: view.key, value: modelAttributeValue } );\n\t\t}\n\t} else {\n\t\t// function.\n\t\treturn view;\n\t}\n}\n\n// Helper function for `highlight`. Prepares the actual descriptor object using value passed to the converter.\nfunction prepareDescriptor( highlightDescriptor, data, conversionApi ) {\n\t// If passed descriptor is a creator function, call it. If not, just use passed value.\n\tconst descriptor = typeof highlightDescriptor == 'function' ?\n\t\thighlightDescriptor( data, conversionApi ) :\n\t\thighlightDescriptor;\n\n\tif ( !descriptor ) {\n\t\treturn null;\n\t}\n\n\t// Apply default descriptor priority.\n\tif ( !descriptor.priority ) {\n\t\tdescriptor.priority = 10;\n\t}\n\n\t// Default descriptor id is marker name.\n\tif ( !descriptor.id ) {\n\t\tdescriptor.id = data.markerName;\n\t}\n\n\treturn descriptor;\n}\n\n/**\n * An object describing how the marker highlight should be represented in the view.\n *\n * Each text node contained in a highlighted range will be wrapped in a `<span>`\n * {@link module:engine/view/attributeelement~AttributeElement view attribute element} with CSS class(es), attributes and a priority\n * described by this object.\n *\n * Additionally, each {@link module:engine/view/containerelement~ContainerElement container element} can handle displaying the highlight\n * separately by providing the `addHighlight` and `removeHighlight` custom properties. In this case:\n *\n * * The `HighlightDescriptor` object is passed to the `addHighlight` function upon conversion and should be used to apply the highlight to\n * the element.\n * * The descriptor `id` is passed to the `removeHighlight` function upon conversion and should be used to remove the highlight with the\n * given ID from the element.\n *\n * @typedef {Object} module:engine/conversion/downcasthelpers~HighlightDescriptor\n *\n * @property {String|Array.<String>} classes A CSS class or an array of classes to set. If the descriptor is used to\n * create an {@link module:engine/view/attributeelement~AttributeElement attribute element} over text nodes, these classes will be set\n * on that attribute element. If the descriptor is applied to an element, usually these classes will be set on that element, however,\n * this depends on how the element converts the descriptor.\n *\n * @property {String} [id] Descriptor identifier. If not provided, it defaults to the converted marker's name.\n *\n * @property {Number} [priority] Descriptor priority. If not provided, it defaults to `10`. If the descriptor is used to create\n * an {@link module:engine/view/attributeelement~AttributeElement attribute element}, it will be that element's\n * {@link module:engine/view/attributeelement~AttributeElement#priority priority}. If the descriptor is applied to an element,\n * the priority will be used to determine which descriptor is more important.\n *\n * @property {Object} [attributes] Attributes to set. If the descriptor is used to create\n * an {@link module:engine/view/attributeelement~AttributeElement attribute element} over text nodes, these attributes will be set on that\n * attribute element. If the descriptor is applied to an element, usually these attributes will be set on that element, however,\n * this depends on how the element converts the descriptor.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Matcher from '../view/matcher';\nimport ModelRange from '../model/range';\nimport ConversionHelpers from './conversionhelpers';\n\nimport { cloneDeep } from 'lodash-es';\nimport ModelSelection from '../model/selection';\n\n/**\n * Contains {@link module:engine/view/view view} to {@link module:engine/model/model model} converters for\n * {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}.\n *\n * @module engine/conversion/upcasthelpers\n */\n\n/**\n * Upcast conversion helper functions.\n *\n * @extends module:engine/conversion/conversionhelpers~ConversionHelpers\n */\nexport default class UpcastHelpers extends ConversionHelpers {\n\t/**\n\t * View element to model element conversion helper.\n\t *\n\t * This conversion results in creating a model element. For example,\n\t * view `<p>Foo</p>` becomes `<paragraph>Foo</paragraph>` in the model.\n\t *\n\t * Keep in mind that the element will be inserted only if it is allowed\n\t * by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: 'p',\n\t *\t\t\tmodel: 'paragraph'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: 'p',\n\t *\t\t\tmodel: 'paragraph',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'fancy'\n\t *\t\t\t},\n\t *\t\t\tmodel: 'fancyParagraph'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t * \t\t\tview: {\n\t *\t\t\t\tname: 'p',\n\t *\t\t\t\tclasses: 'heading'\n\t * \t\t\t},\n\t * \t\t\tmodel: ( viewElement, modelWriter ) => {\n\t * \t\t\t\treturn modelWriter.createElement( 'heading', { level: viewElement.getAttribute( 'data-level' ) } );\n\t * \t\t\t}\n\t * \t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToElement\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} [config.view] Pattern matching all view elements which should be converted. If not\n\t * set, the converter will fire for every view element.\n\t * @param {String|module:engine/model/element~Element|Function} config.model Name of the model element, a model element\n\t * instance or a function that takes a view element and returns a model element. The model element will be inserted in the model.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToElement( config ) {\n\t\treturn this.add( upcastElementToElement( config ) );\n\t}\n\n\t/**\n\t * View element to model attribute conversion helper.\n\t *\n\t * This conversion results in setting an attribute on a model node. For example, view `<strong>Foo</strong>` becomes\n\t * `Foo` {@link module:engine/model/text~Text model text node} with `bold` attribute set to `true`.\n\t *\n\t * This helper is meant to set a model attribute on all the elements that are inside the converted element:\n\t *\n\t *\t\t<strong>Foo</strong> --> <strong><p>Foo</p></strong> --> <paragraph><$text bold=\"true\">Foo</$text></paragraph>\n\t *\n\t * Above is a sample of HTML code, that goes through autoparagraphing (first step) and then is converted (second step).\n\t * Even though `<strong>` is over `<p>` element, `bold=\"true\"` was added to the text. See\n\t * {@link module:engine/conversion/upcasthelpers~UpcastHelpers#attributeToAttribute} for comparison.\n\t *\n\t * Keep in mind that the attribute will be set only if it is allowed by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: 'strong',\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: 'strong',\n\t *\t\t\tmodel: 'bold',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: 'bold'\n\t *\t\t\t},\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tclasses: [ 'styled', 'styled-dark' ]\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled',\n\t *\t\t\t\tvalue: 'dark'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * \t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'font-size': /[\\s\\S]+/\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'fontSize',\n\t *\t\t\t\tvalue: viewElement => {\n\t *\t\t\t\t\tconst fontSize = viewElement.getStyle( 'font-size' );\n\t *\t\t\t\t\tconst value = fontSize.substr( 0, fontSize.length - 2 );\n\t *\n\t *\t\t\t\t\tif ( value <= 10 ) {\n\t *\t\t\t\t\t\treturn 'small';\n\t *\t\t\t\t\t} else if ( value > 12 ) {\n\t *\t\t\t\t\t\treturn 'big';\n\t *\t\t\t\t\t}\n\t *\n\t *\t\t\t\t\treturn null;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n\t * @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n\t * the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n\t * If `String` is given, the model attribute value will be set to `true`.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToAttribute( config ) {\n\t\treturn this.add( upcastElementToAttribute( config ) );\n\t}\n\n\t/**\n\t * View attribute to model attribute conversion helper.\n\t *\n\t * This conversion results in setting an attribute on a model node. For example, view `<img src=\"foo.jpg\"></img>` becomes\n\t * `<image source=\"foo.jpg\"></image>` in the model.\n\t *\n\t * This helper is meant to convert view attributes from view elements which got converted to the model, so the view attribute\n\t * is set only on the corresponding model node:\n\t *\n\t *\t\t<div class=\"dark\"><div>foo</div></div> --> <div dark=\"true\"><div>foo</div></div>\n\t *\n\t * Above, `class=\"dark\"` attribute is added only to the `<div>` elements that has it. This is in contrary to\n\t * {@link module:engine/conversion/upcasthelpers~UpcastHelpers#elementToAttribute} which sets attributes for\n\t * all the children in the model:\n\t *\n\t *\t\t<strong>Foo</strong> --> <strong><p>Foo</p></strong> --> <paragraph><$text bold=\"true\">Foo</$text></paragraph>\n\t *\n\t * Above is a sample of HTML code, that goes through autoparagraphing (first step) and then is converted (second step).\n\t * Even though `<strong>` is over `<p>` element, `bold=\"true\"` was added to the text.\n\t *\n\t * Keep in mind that the attribute will be set only if it is allowed by {@link module:engine/model/schema~Schema schema} configuration.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: 'src',\n\t *\t\t\tmodel: 'source'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: { key: 'src' },\n\t *\t\t\tmodel: 'source'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: { key: 'src' },\n\t *\t\t\tmodel: 'source',\n\t *\t\t\tconverterPriority: 'normal'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tkey: 'data-style',\n\t *\t\t\t\tvalue: /[\\s\\S]+/\n\t *\t\t\t},\n\t *\t\t\tmodel: 'styled'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'img',\n\t *\t\t\t\tkey: 'class',\n\t *\t\t\t\tvalue: 'styled-dark'\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled',\n\t *\t\t\t\tvalue: 'dark'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tkey: 'class',\n\t *\t\t\t\tvalue: /styled-[\\S]+/\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'styled'\n\t *\t\t\t\tvalue: viewElement => {\n\t *\t\t\t\t\tconst regexp = /styled-([\\S]+)/;\n\t *\t\t\t\t\tconst match = viewElement.getAttribute( 'class' ).match( regexp );\n\t *\n\t *\t\t\t\t\treturn match[ 1 ];\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Converting styles works a bit differently as it requires `view.styles` to be an object and by default\n\t * a model attribute will be set to `true` by such a converter. You can set the model attribute to any value by providing the `value`\n\t * callback that returns the desired value.\n\t *\n\t *\t\t// Default conversion of font-weight style will result in setting bold attribute to true.\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'font-weight': 'bold'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: 'bold'\n\t *\t\t} );\n\t *\n\t *\t\t// This converter will pass any style value to the `lineHeight` model attribute.\n\t *\t\teditor.conversion.for( 'upcast' ).attributeToAttribute( {\n\t *\t\t\tview: {\n\t *\t\t\t\tstyles: {\n\t *\t\t\t\t\t'line-height': /[\\s\\S]+/\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: {\n\t *\t\t\t\tkey: 'lineHeight',\n\t *\t\t\t\tvalue: viewElement => viewElement.getStyle( 'line-height' )\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #attributeToAttribute\n\t * @param {Object} config Conversion configuration.\n\t * @param {String|Object} config.view Specifies which view attribute will be converted. If a `String` is passed,\n\t * attributes with given key will be converted. If an `Object` is passed, it must have a required `key` property,\n\t * specifying view attribute key, and may have an optional `value` property, specifying view attribute value and optional `name`\n\t * property specifying a view element name from/on which the attribute should be converted. `value` can be given as a `String`,\n\t * a `RegExp` or a function callback, that takes view attribute value as the only parameter and returns `Boolean`.\n\t * @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n\t * the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n\t * If `String` is given, the model attribute value will be same as view attribute value.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\tattributeToAttribute( config ) {\n\t\treturn this.add( upcastAttributeToAttribute( config ) );\n\t}\n\n\t/**\n\t * View element to model marker conversion helper.\n\t *\n\t * This conversion results in creating a model marker. For example, if the marker was stored in a view as an element:\n\t * `<p>Fo<span data-marker=\"comment\" data-comment-id=\"7\"></span>o</p><p>B<span data-marker=\"comment\" data-comment-id=\"7\"></span>ar</p>`,\n\t * after the conversion is done, the marker will be available in\n\t * {@link module:engine/model/model~Model#markers model document markers}.\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: 'search'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: 'search',\n\t *\t\t\tconverterPriority: 'high'\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: 'marker-search',\n\t *\t\t\tmodel: viewElement => 'comment:' + viewElement.getAttribute( 'data-comment-id' )\n\t *\t\t} );\n\t *\n\t *\t\teditor.conversion.for( 'upcast' ).elementToMarker( {\n\t *\t\t\tview: {\n\t *\t\t\t\tname: 'span',\n\t *\t\t\t\tattributes: {\n\t *\t\t\t\t\t'data-marker': 'search'\n\t *\t\t\t\t}\n\t *\t\t\t},\n\t *\t\t\tmodel: 'search'\n\t *\t\t} );\n\t *\n\t * See {@link module:engine/conversion/conversion~Conversion#for `conversion.for()`} to learn how to add a converter\n\t * to the conversion process.\n\t *\n\t * @method #elementToMarker\n\t * @param {Object} config Conversion configuration.\n\t * @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n\t * @param {String|Function} config.model Name of the model marker, or a function that takes a view element and returns\n\t * a model marker name.\n\t * @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n\t * @returns {module:engine/conversion/upcasthelpers~UpcastHelpers}\n\t */\n\telementToMarker( config ) {\n\t\treturn this.add( upcastElementToMarker( config ) );\n\t}\n}\n\n/**\n * Function factory, creates a converter that converts {@link module:engine/view/documentfragment~DocumentFragment view document fragment}\n * or all children of {@link module:engine/view/element~Element} into\n * {@link module:engine/model/documentfragment~DocumentFragment model document fragment}.\n * This is the \"entry-point\" converter for upcast (view to model conversion). This converter starts the conversion of all children\n * of passed view document fragment. Those children {@link module:engine/view/node~Node view nodes} are then handled by other converters.\n *\n * This also a \"default\", last resort converter for all view elements that has not been converted by other converters.\n * When a view element is being converted to the model but it does not have converter specified, that view element\n * will be converted to {@link module:engine/model/documentfragment~DocumentFragment model document fragment} and returned.\n *\n * @returns {Function} Universal converter for view {@link module:engine/view/documentfragment~DocumentFragment fragments} and\n * {@link module:engine/view/element~Element elements} that returns\n * {@link module:engine/model/documentfragment~DocumentFragment model fragment} with children of converted view item.\n */\nexport function convertToModelFragment() {\n\treturn ( evt, data, conversionApi ) => {\n\t\t// Second argument in `consumable.consume` is discarded for ViewDocumentFragment but is needed for ViewElement.\n\t\tif ( !data.modelRange && conversionApi.consumable.consume( data.viewItem, { name: true } ) ) {\n\t\t\tconst { modelRange, modelCursor } = conversionApi.convertChildren( data.viewItem, data.modelCursor );\n\n\t\t\tdata.modelRange = modelRange;\n\t\t\tdata.modelCursor = modelCursor;\n\t\t}\n\t};\n}\n\n/**\n * Function factory, creates a converter that converts {@link module:engine/view/text~Text} to {@link module:engine/model/text~Text}.\n *\n * @returns {Function} {@link module:engine/view/text~Text View text} converter.\n */\nexport function convertText() {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( conversionApi.schema.checkChild( data.modelCursor, '$text' ) ) {\n\t\t\tif ( conversionApi.consumable.consume( data.viewItem ) ) {\n\t\t\t\tconst text = conversionApi.writer.createText( data.viewItem.data );\n\n\t\t\t\tconversionApi.writer.insert( text, data.modelCursor );\n\n\t\t\t\tdata.modelRange = ModelRange._createFromPositionAndShift( data.modelCursor, text.offsetSize );\n\t\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * Function factory, creates a callback function which converts a {@link module:engine/view/selection~Selection\n * view selection} taken from the {@link module:engine/view/document~Document#event:selectionChange} event\n * and sets in on the {@link module:engine/model/document~Document#selection model}.\n *\n * **Note**: because there is no view selection change dispatcher nor any other advanced view selection to model\n * conversion mechanism, the callback should be set directly on view document.\n *\n *\t\tview.document.on( 'selectionChange', convertSelectionChange( modelDocument, mapper ) );\n *\n * @param {module:engine/model/model~Model} model Data model.\n * @param {module:engine/conversion/mapper~Mapper} mapper Conversion mapper.\n * @returns {Function} {@link module:engine/view/document~Document#event:selectionChange} callback function.\n */\nexport function convertSelectionChange( model, mapper ) {\n\treturn ( evt, data ) => {\n\t\tconst viewSelection = data.newSelection;\n\t\tconst modelSelection = new ModelSelection();\n\n\t\tconst ranges = [];\n\n\t\tfor ( const viewRange of viewSelection.getRanges() ) {\n\t\t\tranges.push( mapper.toModelRange( viewRange ) );\n\t\t}\n\n\t\tmodelSelection.setTo( ranges, { backward: viewSelection.isBackward } );\n\n\t\tif ( !modelSelection.isEqual( model.document.selection ) ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( modelSelection );\n\t\t\t} );\n\t\t}\n\t};\n}\n\n// View element to model element conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToElement `.elementToElement()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} [config.view] Pattern matching all view elements which should be converted. If not\n// set, the converter will fire for every view element.\n// @param {String|module:engine/model/element~Element|Function} config.model Name of the model element, a model element\n// instance or a function that takes a view element and returns a model element. The model element will be inserted in the model.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToElement( config ) {\n\tconfig = cloneDeep( config );\n\n\tconst converter = prepareToElementConverter( config );\n\n\tconst elementName = getViewElementNameFromConfig( config.view );\n\tconst eventName = elementName ? 'element:' + elementName : 'element';\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, converter, { priority: config.converterPriority || 'normal' } );\n\t};\n}\n\n// View element to model attribute conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToAttribute `.elementToAttribute()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n// @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n// the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n// If `String` is given, the model attribute value will be set to `true`.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tnormalizeModelAttributeConfig( config );\n\n\tconst converter = prepareToAttributeConverter( config, false );\n\n\tconst elementName = getViewElementNameFromConfig( config.view );\n\tconst eventName = elementName ? 'element:' + elementName : 'element';\n\n\treturn dispatcher => {\n\t\tdispatcher.on( eventName, converter, { priority: config.converterPriority || 'low' } );\n\t};\n}\n\n// View attribute to model attribute conversion helper.\n//\n// See {@link ~UpcastHelpers#attributeToAttribute `.attributeToAttribute()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {String|Object} config.view Specifies which view attribute will be converted. If a `String` is passed,\n// attributes with given key will be converted. If an `Object` is passed, it must have a required `key` property,\n// specifying view attribute key, and may have an optional `value` property, specifying view attribute value and optional `name`\n// property specifying a view element name from/on which the attribute should be converted. `value` can be given as a `String`,\n// a `RegExp` or a function callback, that takes view attribute value as the only parameter and returns `Boolean`.\n// @param {String|Object} config.model Model attribute key or an object with `key` and `value` properties, describing\n// the model attribute. `value` property may be set as a function that takes a view element and returns the value.\n// If `String` is given, the model attribute value will be same as view attribute value.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='low'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastAttributeToAttribute( config ) {\n\tconfig = cloneDeep( config );\n\n\tlet viewKey = null;\n\n\tif ( typeof config.view == 'string' || config.view.key ) {\n\t\tviewKey = normalizeViewAttributeKeyValueConfig( config );\n\t}\n\n\tnormalizeModelAttributeConfig( config, viewKey );\n\n\tconst converter = prepareToAttributeConverter( config, true );\n\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element', converter, { priority: config.converterPriority || 'low' } );\n\t};\n}\n\n// View element to model marker conversion helper.\n//\n// See {@link ~UpcastHelpers#elementToMarker `.elementToMarker()` upcast helper} for examples.\n//\n// @param {Object} config Conversion configuration.\n// @param {module:engine/view/matcher~MatcherPattern} config.view Pattern matching all view elements which should be converted.\n// @param {String|Function} config.model Name of the model marker, or a function that takes a view element and returns\n// a model marker name.\n// @param {module:utils/priorities~PriorityString} [config.converterPriority='normal'] Converter priority.\n// @returns {Function} Conversion helper.\nfunction upcastElementToMarker( config ) {\n\tconfig = cloneDeep( config );\n\n\tnormalizeToMarkerConfig( config );\n\n\treturn upcastElementToElement( config );\n}\n\n// Helper function for from-view-element conversion. Checks if `config.view` directly specifies converted view element's name\n// and if so, returns it.\n//\n// @param {Object} config Conversion view config.\n// @returns {String|null} View element name or `null` if name is not directly set.\nfunction getViewElementNameFromConfig( viewConfig ) {\n\tif ( typeof viewConfig == 'string' ) {\n\t\treturn viewConfig;\n\t}\n\n\tif ( typeof viewConfig == 'object' && typeof viewConfig.name == 'string' ) {\n\t\treturn viewConfig.name;\n\t}\n\n\treturn null;\n}\n\n// Helper for to-model-element conversion. Takes a config object and returns a proper converter function.\n//\n// @param {Object} config Conversion configuration.\n// @returns {Function} View to model converter.\nfunction prepareToElementConverter( config ) {\n\tconst matcher = config.view ? new Matcher( config.view ) : null;\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tlet match = {};\n\n\t\t// If `config.view` has not been passed do not try matching. In this case, the converter should fire for all elements.\n\t\tif ( matcher ) {\n\t\t\t// This will be usually just one pattern but we support matchers with many patterns too.\n\t\t\tconst matcherResult = matcher.match( data.viewItem );\n\n\t\t\t// If there is no match, this callback should not do anything.\n\t\t\tif ( !matcherResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tmatch = matcherResult.match;\n\t\t}\n\n\t\t// Force consuming element's name.\n\t\tmatch.name = true;\n\n\t\t// Create model element basing on config.\n\t\tconst modelElement = getModelElement( config.model, data.viewItem, conversionApi.writer );\n\n\t\t// Do not convert if element building function returned falsy value.\n\t\tif ( !modelElement ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// When element was already consumed then skip it.\n\t\tif ( !conversionApi.consumable.test( data.viewItem, match ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Find allowed parent for element that we are going to insert.\n\t\t// If current parent does not allow to insert element but one of the ancestors does\n\t\t// then split nodes to allowed parent.\n\t\tconst splitResult = conversionApi.splitToAllowedParent( modelElement, data.modelCursor );\n\n\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\tif ( !splitResult ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Insert element on allowed position.\n\t\tconversionApi.writer.insert( modelElement, splitResult.position );\n\n\t\t// Convert children and insert to element.\n\t\tconversionApi.convertChildren( data.viewItem, conversionApi.writer.createPositionAt( modelElement, 0 ) );\n\n\t\t// Consume appropriate value from consumable values list.\n\t\tconversionApi.consumable.consume( data.viewItem, match );\n\n\t\tconst parts = conversionApi.getSplitParts( modelElement );\n\n\t\t// Set conversion result range.\n\t\tdata.modelRange = new ModelRange(\n\t\t\tconversionApi.writer.createPositionBefore( modelElement ),\n\t\t\tconversionApi.writer.createPositionAfter( parts[ parts.length - 1 ] )\n\t\t);\n\n\t\t// Now we need to check where the `modelCursor` should be.\n\t\tif ( splitResult.cursorParent ) {\n\t\t\t// If we split parent to insert our element then we want to continue conversion in the new part of the split parent.\n\t\t\t//\n\t\t\t// before: <allowed><notAllowed>foo[]</notAllowed></allowed>\n\t\t\t// after: <allowed><notAllowed>foo</notAllowed><converted></converted><notAllowed>[]</notAllowed></allowed>\n\n\t\t\tdata.modelCursor = conversionApi.writer.createPositionAt( splitResult.cursorParent, 0 );\n\t\t} else {\n\t\t\t// Otherwise just continue after inserted element.\n\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t}\n\t};\n}\n\n// Helper function for upcasting-to-element converter. Takes the model configuration, the converted view element\n// and a writer instance and returns a model element instance to be inserted in the model.\n//\n// @param {String|Function|module:engine/model/element~Element} model Model conversion configuration.\n// @param {module:engine/view/node~Node} input The converted view node.\n// @param {module:engine/model/writer~Writer} writer A writer instance to use to create the model element.\nfunction getModelElement( model, input, writer ) {\n\tif ( model instanceof Function ) {\n\t\treturn model( input, writer );\n\t} else {\n\t\treturn writer.createElement( model );\n\t}\n}\n\n// Helper function view-attribute-to-model-attribute helper. Normalizes `config.view` which was set as `String` or\n// as an `Object` with `key`, `value` and `name` properties. Normalized `config.view` has is compatible with\n// {@link module:engine/view/matcher~MatcherPattern}.\n//\n// @param {Object} config Conversion config.\n// @returns {String} Key of the converted view attribute.\nfunction normalizeViewAttributeKeyValueConfig( config ) {\n\tif ( typeof config.view == 'string' ) {\n\t\tconfig.view = { key: config.view };\n\t}\n\n\tconst key = config.view.key;\n\tlet normalized;\n\n\tif ( key == 'class' || key == 'style' ) {\n\t\tconst keyName = key == 'class' ? 'classes' : 'styles';\n\n\t\tnormalized = {\n\t\t\t[ keyName ]: config.view.value\n\t\t};\n\t} else {\n\t\tconst value = typeof config.view.value == 'undefined' ? /[\\s\\S]*/ : config.view.value;\n\n\t\tnormalized = {\n\t\t\tattributes: {\n\t\t\t\t[ key ]: value\n\t\t\t}\n\t\t};\n\t}\n\n\tif ( config.view.name ) {\n\t\tnormalized.name = config.view.name;\n\t}\n\n\tconfig.view = normalized;\n\n\treturn key;\n}\n\n// Helper function that normalizes `config.model` in from-model-attribute conversion. `config.model` can be set\n// as a `String`, an `Object` with only `key` property or an `Object` with `key` and `value` properties. Normalized\n// `config.model` is an `Object` with `key` and `value` properties.\n//\n// @param {Object} config Conversion config.\n// @param {String} viewAttributeKeyToCopy Key of the converted view attribute. If it is set, model attribute value\n// will be equal to view attribute value.\nfunction normalizeModelAttributeConfig( config, viewAttributeKeyToCopy = null ) {\n\tconst defaultModelValue = viewAttributeKeyToCopy === null ? true : viewElement => viewElement.getAttribute( viewAttributeKeyToCopy );\n\n\tconst key = typeof config.model != 'object' ? config.model : config.model.key;\n\tconst value = typeof config.model != 'object' || typeof config.model.value == 'undefined' ? defaultModelValue : config.model.value;\n\n\tconfig.model = { key, value };\n}\n\n// Helper for to-model-attribute conversion. Takes the model attribute name and conversion configuration and returns\n// a proper converter function.\n//\n// @param {String} modelAttributeKey The key of the model attribute to set on a model node.\n// @param {Object|Array.<Object>} config Conversion configuration. It is possible to provide multiple configurations in an array.\n// @param {Boolean} shallow If set to `true` the attribute will be set only on top-level nodes. Otherwise, it will be set\n// on all elements in the range.\nfunction prepareToAttributeConverter( config, shallow ) {\n\tconst matcher = new Matcher( config.view );\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst match = matcher.match( data.viewItem );\n\n\t\t// If there is no match, this callback should not do anything.\n\t\tif ( !match ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelKey = config.model.key;\n\t\tconst modelValue = typeof config.model.value == 'function' ? config.model.value( data.viewItem ) : config.model.value;\n\n\t\t// Do not convert if attribute building function returned falsy value.\n\t\tif ( modelValue === null ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( onlyViewNameIsDefined( config.view, data.viewItem ) ) {\n\t\t\tmatch.match.name = true;\n\t\t} else {\n\t\t\t// Do not test or consume `name` consumable.\n\t\t\tdelete match.match.name;\n\t\t}\n\n\t\t// Try to consume appropriate values from consumable values list.\n\t\tif ( !conversionApi.consumable.test( data.viewItem, match.match ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Since we are converting to attribute we need an range on which we will set the attribute.\n\t\t// If the range is not created yet, we will create it.\n\t\tif ( !data.modelRange ) {\n\t\t\t// Convert children and set conversion result as a current data.\n\t\t\tdata = Object.assign( data, conversionApi.convertChildren( data.viewItem, data.modelCursor ) );\n\t\t}\n\n\t\t// Set attribute on current `output`. `Schema` is checked inside this helper function.\n\t\tconst attributeWasSet = setAttributeOn( data.modelRange, { key: modelKey, value: modelValue }, shallow, conversionApi );\n\n\t\tif ( attributeWasSet ) {\n\t\t\tconversionApi.consumable.consume( data.viewItem, match.match );\n\t\t}\n\t};\n}\n\n// Helper function that checks if element name should be consumed in attribute converters.\n//\n// @param {Object} config Conversion view config.\n// @returns {Boolean}\nfunction onlyViewNameIsDefined( viewConfig, viewItem ) {\n\t// https://github.com/ckeditor/ckeditor5-engine/issues/1786\n\tconst configToTest = typeof viewConfig == 'function' ? viewConfig( viewItem ) : viewConfig;\n\n\tif ( typeof configToTest == 'object' && !getViewElementNameFromConfig( configToTest ) ) {\n\t\treturn false;\n\t}\n\n\treturn !configToTest.classes && !configToTest.attributes && !configToTest.styles;\n}\n\n// Helper function for to-model-attribute converter. Sets model attribute on given range. Checks {@link module:engine/model/schema~Schema}\n// to ensure proper model structure.\n//\n// @param {module:engine/model/range~Range} modelRange Model range on which attribute should be set.\n// @param {Object} modelAttribute Model attribute to set.\n// @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion API.\n// @param {Boolean} shallow If set to `true` the attribute will be set only on top-level nodes. Otherwise, it will be set\n// on all elements in the range.\n// @returns {Boolean} `true` if attribute was set on at least one node from given `modelRange`.\nfunction setAttributeOn( modelRange, modelAttribute, shallow, conversionApi ) {\n\tlet result = false;\n\n\t// Set attribute on each item in range according to Schema.\n\tfor ( const node of Array.from( modelRange.getItems( { shallow } ) ) ) {\n\t\tif ( conversionApi.schema.checkAttribute( node, modelAttribute.key ) ) {\n\t\t\tconversionApi.writer.setAttribute( modelAttribute.key, modelAttribute.value, node );\n\n\t\t\tresult = true;\n\t\t}\n\t}\n\n\treturn result;\n}\n\n// Helper function for upcasting-to-marker conversion. Takes the config in a format requested by `upcastElementToMarker()`\n// function and converts it to a format that is supported by `_upcastElementToElement()` function.\n//\n// @param {Object} config Conversion configuration.\nfunction normalizeToMarkerConfig( config ) {\n\tconst oldModel = config.model;\n\n\tconfig.model = ( viewElement, modelWriter ) => {\n\t\tconst markerName = typeof oldModel == 'string' ? oldModel : oldModel( viewElement );\n\n\t\treturn modelWriter.createElement( '$marker', { 'data-name': markerName } );\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/controller/editingcontroller\n */\n\nimport RootEditableElement from '../view/rooteditableelement';\nimport View from '../view/view';\nimport Mapper from '../conversion/mapper';\nimport DowncastDispatcher from '../conversion/downcastdispatcher';\nimport { clearAttributes, convertCollapsedSelection, convertRangeSelection, insertText, remove } from '../conversion/downcasthelpers';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { convertSelectionChange } from '../conversion/upcasthelpers';\n\n// @if CK_DEBUG_ENGINE // const { dumpTrees, initDocumentDumping } = require( '../dev-utils/utils' );\n\n/**\n * Controller for the editing pipeline. The editing pipeline controls {@link ~EditingController#model model} rendering,\n * including selection handling. It also creates the {@link ~EditingController#view view} which builds a\n * browser-independent virtualization over the DOM elements. The editing controller also attaches default converters.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class EditingController {\n\t/**\n\t * Creates an editing controller instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Editing model.\n\t */\n\tconstructor( model ) {\n\t\t/**\n\t\t * Editor model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Editing view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = new View();\n\n\t\t/**\n\t\t * Mapper which describes the model-view binding.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/mapper~Mapper}\n\t\t */\n\t\tthis.mapper = new Mapper();\n\n\t\t/**\n\t\t * Downcast dispatcher that converts changes from the model to {@link #view the editing view}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher} #downcastDispatcher\n\t\t */\n\t\tthis.downcastDispatcher = new DowncastDispatcher( {\n\t\t\tmapper: this.mapper\n\t\t} );\n\n\t\tconst doc = this.model.document;\n\t\tconst selection = doc.selection;\n\t\tconst markers = this.model.markers;\n\n\t\t// When plugins listen on model changes (on selection change, post fixers, etc) and change the view as a result of\n\t\t// model's change, they might trigger view rendering before the conversion is completed (e.g. before the selection\n\t\t// is converted). We disable rendering for the length of the outermost model change() block to prevent that.\n\t\t//\n\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/1528\n\t\tthis.listenTo( this.model, '_beforeChanges', () => {\n\t\t\tthis.view._disableRendering( true );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( this.model, '_afterChanges', () => {\n\t\t\tthis.view._disableRendering( false );\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Whenever model document is changed, convert those changes to the view (using model.Document#differ).\n\t\t// Do it on 'low' priority, so changes are converted after other listeners did their job.\n\t\t// Also convert model selection.\n\t\tthis.listenTo( doc, 'change', () => {\n\t\t\tthis.view.change( writer => {\n\t\t\t\tthis.downcastDispatcher.convertChanges( doc.differ, markers, writer );\n\t\t\t\tthis.downcastDispatcher.convertSelection( selection, markers, writer );\n\t\t\t} );\n\t\t}, { priority: 'low' } );\n\n\t\t// Convert selection from the view to the model when it changes in the view.\n\t\tthis.listenTo( this.view.document, 'selectionChange', convertSelectionChange( this.model, this.mapper ) );\n\n\t\t// Attach default model converters.\n\t\tthis.downcastDispatcher.on( 'insert:$text', insertText(), { priority: 'lowest' } );\n\t\tthis.downcastDispatcher.on( 'remove', remove(), { priority: 'low' } );\n\n\t\t// Attach default model selection converters.\n\t\tthis.downcastDispatcher.on( 'selection', clearAttributes(), { priority: 'low' } );\n\t\tthis.downcastDispatcher.on( 'selection', convertRangeSelection(), { priority: 'low' } );\n\t\tthis.downcastDispatcher.on( 'selection', convertCollapsedSelection(), { priority: 'low' } );\n\n\t\t// Binds {@link module:engine/view/document~Document#roots view roots collection} to\n\t\t// {@link module:engine/model/document~Document#roots model roots collection} so creating\n\t\t// model root automatically creates corresponding view root.\n\t\tthis.view.document.roots.bindTo( this.model.document.roots ).using( root => {\n\t\t\t// $graveyard is a special root that has no reflection in the view.\n\t\t\tif ( root.rootName == '$graveyard' ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewRoot = new RootEditableElement( root.name );\n\n\t\t\tviewRoot.rootName = root.rootName;\n\t\t\tviewRoot._document = this.view.document;\n\t\t\tthis.mapper.bindElements( root, viewRoot );\n\n\t\t\treturn viewRoot;\n\t\t} );\n\n\t\t// @if CK_DEBUG_ENGINE // initDocumentDumping( this.model.document );\n\t\t// @if CK_DEBUG_ENGINE // initDocumentDumping( this.view.document );\n\n\t\t// @if CK_DEBUG_ENGINE // dumpTrees( this.model.document, this.model.document.version );\n\t\t// @if CK_DEBUG_ENGINE // dumpTrees( this.view.document, this.model.document.version );\n\n\t\t// @if CK_DEBUG_ENGINE // this.model.document.on( 'change', () => {\n\t\t// @if CK_DEBUG_ENGINE //\tdumpTrees( this.view.document, this.model.document.version );\n\t\t// @if CK_DEBUG_ENGINE // }, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Removes all event listeners attached to the `EditingController`. Destroys all objects created\n\t * by `EditingController` that need to be destroyed.\n\t */\n\tdestroy() {\n\t\tthis.view.destroy();\n\t\tthis.stopListening();\n\t}\n}\n\nmix( EditingController, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/plugincollection\n */\n\n/* globals console */\n\nimport CKEditorError, { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Manages a list of CKEditor plugins, including loading, resolving dependencies and initialization.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class PluginCollection {\n\t/**\n\t * Creates an instance of the PluginCollection class.\n\t * Allows loading and initializing plugins and their dependencies.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {Array.<Function>} [availablePlugins] Plugins (constructors) which the collection will be able to use\n\t * when {@link module:core/plugincollection~PluginCollection#init} is used with plugin names (strings, instead of constructors).\n\t * Usually, the editor will pass its built-in plugins to the collection so they can later be\n\t * used in `config.plugins` or `config.removePlugins` by names.\n\t */\n\tconstructor( editor, availablePlugins = [] ) {\n\t\t/**\n\t\t * @protected\n\t\t * @member {module:core/editor/editor~Editor} module:core/plugin~PluginCollection#_editor\n\t\t */\n\t\tthis._editor = editor;\n\n\t\t/**\n\t\t * Map of plugin constructors which can be retrieved by their names.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<String|Function,Function>} module:core/plugin~PluginCollection#_availablePlugins\n\t\t */\n\t\tthis._availablePlugins = new Map();\n\n\t\t/**\n\t\t * @protected\n\t\t * @member {Map} module:core/plugin~PluginCollection#_plugins\n\t\t */\n\t\tthis._plugins = new Map();\n\n\t\tfor ( const PluginConstructor of availablePlugins ) {\n\t\t\tthis._availablePlugins.set( PluginConstructor, PluginConstructor );\n\n\t\t\tif ( PluginConstructor.pluginName ) {\n\t\t\t\tthis._availablePlugins.set( PluginConstructor.pluginName, PluginConstructor );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Returns `[ PluginConstructor, pluginInstance ]` pairs.\n\t *\n\t * @returns {Iterable.<Array>}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tfor ( const entry of this._plugins ) {\n\t\t\tif ( typeof entry[ 0 ] == 'function' ) {\n\t\t\t\tyield entry;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Gets the plugin instance by its constructor or name.\n\t *\n\t *\t\t// Check if 'Clipboard' plugin was loaded.\n\t *\t\tif ( editor.plugins.has( 'Clipboard' ) ) {\n\t *\t\t\t// Get clipboard plugin instance\n\t *\t\t\tconst clipboard = editor.plugins.get( 'Clipboard' );\n\t *\n\t *\t\t\tthis.listenTo( clipboard, 'inputTransformation', ( evt, data ) => {\n\t *\t\t\t\t// Do something on clipboard input.\n\t *\t\t\t} );\n\t *\t\t}\n\t *\n\t * **Note**: This method will throw error if plugin is not loaded. Use `{@link #has editor.plugins.has()}`\n\t * to check if plugin is available.\n\t *\n\t * @param {Function|String} key The plugin constructor or {@link module:core/plugin~PluginInterface.pluginName name}.\n\t * @returns {module:core/plugin~PluginInterface}\n\t */\n\tget( key ) {\n\t\tconst plugin = this._plugins.get( key );\n\n\t\tif ( !plugin ) {\n\t\t\t/**\n\t\t\t * The plugin is not loaded and could not be obtained.\n\t\t\t *\n\t\t\t * Plugin classes (constructors) need to be provided to the editor and must be loaded before they can be obtained from\n\t\t\t * the plugin collection.\n\t\t\t * This is usually done in CKEditor 5 builds by setting the {@link module:core/editor/editor~Editor.builtinPlugins}\n\t\t\t * property.\n\t\t\t *\n\t\t\t * **Note**: You can use `{@link module:core/plugincollection~PluginCollection#has editor.plugins.has()}`\n\t\t\t * to check if plugin was loaded.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-not-loaded\n\t\t\t * @param {String} plugin The name of the plugin which is not loaded.\n\t\t\t */\n\t\t\tconst errorMsg = 'plugincollection-plugin-not-loaded: The requested plugin is not loaded.';\n\n\t\t\tlet pluginName = key;\n\n\t\t\tif ( typeof key == 'function' ) {\n\t\t\t\tpluginName = key.pluginName || key.name;\n\t\t\t}\n\n\t\t\tthrow new CKEditorError( errorMsg, this._editor, { plugin: pluginName } );\n\t\t}\n\n\t\treturn plugin;\n\t}\n\n\t/**\n\t * Checks if plugin is loaded.\n\t *\n\t *\t\t// Check if 'Clipboard' plugin was loaded.\n\t *\t\tif ( editor.plugins.has( 'Clipboard' ) ) {\n\t *\t\t\t// Now use clipboard plugin instance:\n\t *\t\t\tconst clipboard = editor.plugins.get( 'Clipboard' );\n\t *\n\t *\t\t\t// ...\n\t *\t\t}\n\t *\n\t * @param {Function|String} key The plugin constructor or {@link module:core/plugin~PluginInterface.pluginName name}.\n\t * @returns {Boolean}\n\t */\n\thas( key ) {\n\t\treturn this._plugins.has( key );\n\t}\n\n\t/**\n\t * Initializes a set of plugins and adds them to the collection.\n\t *\n\t * @param {Array.<Function|String>} plugins An array of {@link module:core/plugin~PluginInterface plugin constructors}\n\t * or {@link module:core/plugin~PluginInterface.pluginName plugin names}. The second option (names) works only if\n\t * `availablePlugins` were passed to the {@link #constructor}.\n\t * @param {Array.<String|Function>} [removePlugins] Names of plugins or plugin constructors\n\t * that should not be loaded (despite being specified in the `plugins` array).\n\t * @returns {Promise.<module:core/plugin~LoadedPlugins>} A promise which gets resolved once all plugins are loaded\n\t * and available in the collection.\n\t */\n\tinit( plugins, removePlugins = [] ) {\n\t\tconst that = this;\n\t\tconst editor = this._editor;\n\t\tconst loading = new Set();\n\t\tconst loaded = [];\n\n\t\tconst pluginConstructors = mapToAvailableConstructors( plugins );\n\t\tconst removePluginConstructors = mapToAvailableConstructors( removePlugins );\n\t\tconst missingPlugins = getMissingPluginNames( plugins );\n\n\t\tif ( missingPlugins ) {\n\t\t\t/**\n\t\t\t * Some plugins are not available and could not be loaded.\n\t\t\t *\n\t\t\t * Plugin classes (constructors) need to be provided to the editor before they can be loaded by name.\n\t\t\t * This is usually done in CKEditor 5 builds by setting the {@link module:core/editor/editor~Editor.builtinPlugins}\n\t\t\t * property.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the {@glink builds/index CKEditor 5 Builds}**, it means\n\t\t\t * that you try to enable a plugin which was not included in that build. This may be due to a typo\n\t\t\t * in the plugin name or simply because that plugin is not a part of this build. In the latter scenario,\n\t\t\t * read more about {@glink builds/guides/development/custom-builds custom builds}.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the editor creators directly** (not a build), then it means\n\t\t\t * that you tried loading plugins by name. However, unlike CKEditor 4, CKEditor 5 does not implement a \"plugin loader\".\n\t\t\t * This means that CKEditor 5 does not know where to load the plugin modules from. Therefore, you need to\n\t\t\t * provide each plugin through reference (as a constructor function). Check out the examples in\n\t\t\t * {@glink builds/guides/integration/advanced-setup#scenario-2-building-from-source \"Building from source\"}.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-not-found\n\t\t\t * @param {Array.<String>} plugins The name of the plugins which could not be loaded.\n\t\t\t */\n\t\t\tconst errorMsg = 'plugincollection-plugin-not-found: Some plugins are not available and could not be loaded.';\n\n\t\t\t// Log the error so it's more visible on the console. Hopefully, for better DX.\n\t\t\tconsole.error( attachLinkToDocumentation( errorMsg ), { plugins: missingPlugins } );\n\n\t\t\treturn Promise.reject( new CKEditorError( errorMsg, this._editor, { plugins: missingPlugins } ) );\n\t\t}\n\n\t\treturn Promise.all( pluginConstructors.map( loadPlugin ) )\n\t\t\t.then( () => initPlugins( loaded, 'init' ) )\n\t\t\t.then( () => initPlugins( loaded, 'afterInit' ) )\n\t\t\t.then( () => loaded );\n\n\t\tfunction loadPlugin( PluginConstructor ) {\n\t\t\tif ( removePluginConstructors.includes( PluginConstructor ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The plugin is already loaded or being loaded - do nothing.\n\t\t\tif ( that._plugins.has( PluginConstructor ) || loading.has( PluginConstructor ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\treturn instantiatePlugin( PluginConstructor )\n\t\t\t\t.catch( err => {\n\t\t\t\t\t/**\n\t\t\t\t\t * It was not possible to load the plugin.\n\t\t\t\t\t *\n\t\t\t\t\t * This is a generic error logged to the console when a JavaSript error is thrown during the initialization\n\t\t\t\t\t * of one of the plugins.\n\t\t\t\t\t *\n\t\t\t\t\t * If you correctly handled the promise returned by the editor's `create()` method (like shown below)\n\t\t\t\t\t * you will find the original error logged to the console, too:\n\t\t\t\t\t *\n\t\t\t\t\t *\t\tClassicEditor.create( document.getElementById( 'editor' ) )\n\t\t\t\t\t *\t\t\t.then( editor => {\n\t\t\t\t\t *\t\t\t\t// ...\n\t\t\t\t\t * \t\t\t} )\n\t\t\t\t\t *\t\t\t.catch( error => {\n\t\t\t\t\t *\t\t\t\tconsole.error( error );\n\t\t\t\t\t *\t\t\t} );\n\t\t\t\t\t *\n\t\t\t\t\t * @error plugincollection-load\n\t\t\t\t\t * @param {String} plugin The name of the plugin that could not be loaded.\n\t\t\t\t\t */\n\t\t\t\t\tconsole.error( attachLinkToDocumentation(\n\t\t\t\t\t\t'plugincollection-load: It was not possible to load the plugin.'\n\t\t\t\t\t), { plugin: PluginConstructor } );\n\n\t\t\t\t\tthrow err;\n\t\t\t\t} );\n\t\t}\n\n\t\tfunction initPlugins( loadedPlugins, method ) {\n\t\t\treturn loadedPlugins.reduce( ( promise, plugin ) => {\n\t\t\t\tif ( !plugin[ method ] ) {\n\t\t\t\t\treturn promise;\n\t\t\t\t}\n\n\t\t\t\treturn promise.then( plugin[ method ].bind( plugin ) );\n\t\t\t}, Promise.resolve() );\n\t\t}\n\n\t\tfunction instantiatePlugin( PluginConstructor ) {\n\t\t\treturn new Promise( resolve => {\n\t\t\t\tloading.add( PluginConstructor );\n\n\t\t\t\tif ( PluginConstructor.requires ) {\n\t\t\t\t\tPluginConstructor.requires.forEach( RequiredPluginConstructorOrName => {\n\t\t\t\t\t\tconst RequiredPluginConstructor = getPluginConstructor( RequiredPluginConstructorOrName );\n\n\t\t\t\t\t\tif ( removePlugins.includes( RequiredPluginConstructor ) ) {\n\t\t\t\t\t\t\t/**\n\t\t\t\t\t\t\t * Cannot load a plugin because one of its dependencies is listed in the `removePlugins` option.\n\t\t\t\t\t\t\t *\n\t\t\t\t\t\t\t * @error plugincollection-required\n\t\t\t\t\t\t\t * @param {Function} plugin The required plugin.\n\t\t\t\t\t\t\t * @param {Function} requiredBy The parent plugin.\n\t\t\t\t\t\t\t */\n\t\t\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t\t\t'plugincollection-required: Cannot load a plugin because one of its dependencies is listed in' +\n\t\t\t\t\t\t\t\t'the `removePlugins` option.',\n\t\t\t\t\t\t\t\teditor,\n\t\t\t\t\t\t\t\t{ plugin: RequiredPluginConstructor, requiredBy: PluginConstructor }\n\t\t\t\t\t\t\t);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tloadPlugin( RequiredPluginConstructor );\n\t\t\t\t\t} );\n\t\t\t\t}\n\n\t\t\t\tconst plugin = new PluginConstructor( editor );\n\t\t\t\tthat._add( PluginConstructor, plugin );\n\t\t\t\tloaded.push( plugin );\n\n\t\t\t\tresolve();\n\t\t\t} );\n\t\t}\n\n\t\tfunction getPluginConstructor( PluginConstructorOrName ) {\n\t\t\tif ( typeof PluginConstructorOrName == 'function' ) {\n\t\t\t\treturn PluginConstructorOrName;\n\t\t\t}\n\n\t\t\treturn that._availablePlugins.get( PluginConstructorOrName );\n\t\t}\n\n\t\tfunction getMissingPluginNames( plugins ) {\n\t\t\tconst missingPlugins = [];\n\n\t\t\tfor ( const pluginNameOrConstructor of plugins ) {\n\t\t\t\tif ( !getPluginConstructor( pluginNameOrConstructor ) ) {\n\t\t\t\t\tmissingPlugins.push( pluginNameOrConstructor );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn missingPlugins.length ? missingPlugins : null;\n\t\t}\n\n\t\tfunction mapToAvailableConstructors( plugins ) {\n\t\t\treturn plugins\n\t\t\t\t.map( pluginNameOrConstructor => getPluginConstructor( pluginNameOrConstructor ) )\n\t\t\t\t.filter( PluginConstructor => !!PluginConstructor );\n\t\t}\n\t}\n\n\t/**\n\t * Destroys all loaded plugins.\n\t *\n\t * @returns {Promise}\n\t */\n\tdestroy() {\n\t\tconst promises = Array.from( this )\n\t\t\t.map( ( [ , pluginInstance ] ) => pluginInstance )\n\t\t\t.filter( pluginInstance => typeof pluginInstance.destroy == 'function' )\n\t\t\t.map( pluginInstance => pluginInstance.destroy() );\n\n\t\treturn Promise.all( promises );\n\t}\n\n\t/**\n\t * Adds the plugin to the collection. Exposed mainly for testing purposes.\n\t *\n\t * @protected\n\t * @param {Function} PluginConstructor The plugin constructor.\n\t * @param {module:core/plugin~PluginInterface} plugin The instance of the plugin.\n\t */\n\t_add( PluginConstructor, plugin ) {\n\t\tthis._plugins.set( PluginConstructor, plugin );\n\n\t\tconst pluginName = PluginConstructor.pluginName;\n\n\t\tif ( !pluginName ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this._plugins.has( pluginName ) ) {\n\t\t\t/**\n\t\t\t * Two plugins with the same {@link module:core/plugin~PluginInterface.pluginName} were loaded.\n\t\t\t * This will lead to runtime conflicts between these plugins.\n\t\t\t *\n\t\t\t * In practice, this warning usually means that new plugins were added to an existing CKEditor 5 build.\n\t\t\t * Plugins should always be added to a source version of the editor (`@ckeditor/ckeditor5-editor-*`),\n\t\t\t * not to an editor imported from one of the `@ckeditor/ckeditor5-build-*` packages.\n\t\t\t *\n\t\t\t * Check your import paths and the list of plugins passed to\n\t\t\t * {@link module:core/editor/editor~Editor.create `Editor.create()`}\n\t\t\t * or specified in {@link module:core/editor/editor~Editor.builtinPlugins `Editor.builtinPlugins`}.\n\t\t\t *\n\t\t\t * The second option is that your `node_modules/` directory contains duplicated versions of the same\n\t\t\t * CKEditor 5 packages. Normally, on clean installations, npm deduplicates packages in `node_modules/`, so\n\t\t\t * it may be enough to call `rm -rf node_modules && npm i`. However, if you installed conflicting versions\n\t\t\t * of packages, their dependencies may need to be installed in more than one version which may lead to this\n\t\t\t * warning.\n\t\t\t *\n\t\t\t * Technically speaking, this error occurs because after adding a plugin to an existing editor build\n\t\t\t * dependencies of this plugin are being duplicated.\n\t\t\t * They are already built into that editor build and now get added for the second time as dependencies\n\t\t\t * of the plugin you are installing.\n\t\t\t *\n\t\t\t * Read more about {@glink builds/guides/integration/installing-plugins installing plugins}.\n\t\t\t *\n\t\t\t * @error plugincollection-plugin-name-conflict\n\t\t\t * @param {String} pluginName The duplicated plugin name.\n\t\t\t * @param {Function} plugin1 The first plugin constructor.\n\t\t\t * @param {Function} plugin2 The second plugin constructor.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'plugincollection-plugin-name-conflict: Two plugins with the same name were loaded.',\n\t\t\t\tnull,\n\t\t\t\t{ pluginName, plugin1: this._plugins.get( pluginName ).constructor, plugin2: PluginConstructor }\n\t\t\t);\n\t\t}\n\n\t\tthis._plugins.set( pluginName, plugin );\n\t}\n}\n\nmix( PluginCollection, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/commandcollection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Collection of commands. Its instance is available in {@link module:core/editor/editor~Editor#commands `editor.commands`}.\n */\nexport default class CommandCollection {\n\t/**\n\t * Creates collection instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Command map.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._commands = new Map();\n\t}\n\n\t/**\n\t * Registers a new command.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @param {module:core/command~Command} command\n\t */\n\tadd( commandName, command ) {\n\t\tthis._commands.set( commandName, command );\n\t}\n\n\t/**\n\t * Retrieves a command from the collection.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @returns {module:core/command~Command}\n\t */\n\tget( commandName ) {\n\t\treturn this._commands.get( commandName );\n\t}\n\n\t/**\n\t * Executes a command.\n\t *\n\t * @param {String} commandName The name of the command.\n\t * @param {*} [...commandParams] Command parameters.\n\t */\n\texecute( commandName, ...args ) {\n\t\tconst command = this.get( commandName );\n\n\t\tif ( !command ) {\n\t\t\t/**\n\t\t\t * Command does not exist.\n\t\t\t *\n\t\t\t * @error commandcollection-command-not-found\n\t\t\t * @param {String} commandName Name of the command.\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'commandcollection-command-not-found: Command does not exist.', this, { commandName } );\n\t\t}\n\n\t\tcommand.execute( ...args );\n\t}\n\n\t/**\n\t * Returns iterator of command names.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* names() {\n\t\tyield* this._commands.keys();\n\t}\n\n\t/**\n\t * Returns iterator of command instances.\n\t *\n\t * @returns {Iterable.<module:core/command~Command>}\n\t */\n\t* commands() {\n\t\tyield* this._commands.values();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Returns `[ commandName, commandInstance ]` pairs.\n\t *\n\t * @returns {Iterable.<Array>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._commands[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Destroys all collection commands.\n\t */\n\tdestroy() {\n\t\tfor ( const command of this.commands() ) {\n\t\t\tcommand.destroy();\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window */\n\n/**\n * @module utils/translation-service\n */\n\n/* istanbul ignore else */\nif ( !window.CKEDITOR_TRANSLATIONS ) {\n\twindow.CKEDITOR_TRANSLATIONS = {};\n}\n\n/**\n * Adds translations to existing ones.\n * These translations will later be available for the {@link module:utils/translation-service~translate `translate()`} function.\n *\n *\t\tadd( 'pl', {\n *\t\t\t'OK': 'OK',\n *\t\t\t'Cancel [context: reject]': 'Anuluj'\n *\t\t} );\n *\n * If you cannot import this function from this module (e.g. because you use a CKEditor 5 build), then you can\n * still add translations by extending the global `window.CKEDITOR_TRANSLATIONS` object by using a function like\n * the one below:\n *\n *\t\tfunction addTranslations( language, translations ) {\n *\t\t\tif ( !window.CKEDITOR_TRANSLATIONS ) {\n *\t\t\t\twindow.CKEDITOR_TRANSLATIONS = {};\n *\t\t\t}\n *\n *\t\t\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ] || ( window.CKEDITOR_TRANSLATIONS[ language ] = {} );\n *\n *\t\t\t// Extend the dictionary for the given language.\n *\t\t\tObject.assign( dictionary, translations );\n *\t\t}\n *\n * @param {String} language Target language.\n * @param {Object.<String, String>} translations Translations which will be added to the dictionary.\n */\nexport function add( language, translations ) {\n\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ] || ( window.CKEDITOR_TRANSLATIONS[ language ] = {} );\n\n\tObject.assign( dictionary, translations );\n}\n\n/**\n * Translates string if the translation of the string was previously added to the dictionary.\n * See {@link module:utils/translation-service Translation Service}.\n * This happens in a multi-language mode were translation modules are created by the bundler.\n *\n * When no translation is defined in the dictionary or the dictionary doesn't exist this function returns\n * the original string without the `'[context: ]'` (happens in development and single-language modes).\n *\n * In a single-language mode (when values passed to `t()` were replaced with target language strings) the dictionary\n * is left empty, so this function will return the original strings always.\n *\n *\t\ttranslate( 'pl', 'Cancel [context: reject]' );\n *\n * @param {String} language Target language.\n * @param {String} translationKey String that will be translated.\n * @returns {String} Translated sentence.\n */\nexport function translate( language, translationKey ) {\n\tconst numberOfLanguages = getNumberOfLanguages();\n\n\tif ( numberOfLanguages === 1 ) {\n\t\t// Override the language to the only supported one.\n\t\t// This can't be done in the `Locale` class, because the translations comes after the `Locale` class initialization.\n\t\tlanguage = Object.keys( window.CKEDITOR_TRANSLATIONS )[ 0 ];\n\t}\n\n\tif ( numberOfLanguages === 0 || !hasTranslation( language, translationKey ) ) {\n\t\treturn translationKey.replace( / \\[context: [^\\]]+\\]$/, '' );\n\t}\n\n\tconst dictionary = window.CKEDITOR_TRANSLATIONS[ language ];\n\n\t// In case of missing translations we still need to cut off the `[context: ]` parts.\n\treturn dictionary[ translationKey ].replace( / \\[context: [^\\]]+\\]$/, '' );\n}\n\n/**\n * Clears dictionaries for test purposes.\n *\n * @protected\n */\nexport function _clear() {\n\twindow.CKEDITOR_TRANSLATIONS = {};\n}\n\n// Checks whether the dictionary exists and translation in that dictionary exists.\nfunction hasTranslation( language, translationKey ) {\n\treturn (\n\t\t( language in window.CKEDITOR_TRANSLATIONS ) &&\n\t\t( translationKey in window.CKEDITOR_TRANSLATIONS[ language ] )\n\t);\n}\n\nfunction getNumberOfLanguages() {\n\treturn Object.keys( window.CKEDITOR_TRANSLATIONS ).length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/locale\n */\n\n/* globals console */\n\nimport { translate } from './translation-service';\n\nconst RTL_LANGUAGE_CODES = [ 'ar', 'fa', 'he', 'ku', 'ug' ];\n\n/**\n * Represents the localization services.\n */\nexport default class Locale {\n\t/**\n\t * Creates a new instance of the Locale class. Learn more about\n\t * {@glink features/ui-language configuring language of the editor}.\n\t *\n\t * @param {Object} [options] Locale configuration.\n\t * @param {String} [options.uiLanguage='en'] The editor UI language code in the\n\t * [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format. See {@link #uiLanguage}.\n\t * @param {String} [options.contentLanguage] The editor content language code in the\n\t * [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format. If not specified, the same as `options.language`.\n\t * See {@link #contentLanguage}.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The editor UI language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t\t *\n\t\t * If the {@link #contentLanguage content language} was not specified in the `Locale` constructor,\n\t\t * it also defines the language of the content.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.uiLanguage = options.uiLanguage || 'en';\n\n\t\t/**\n\t\t * The editor content language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t\t *\n\t\t * Usually the same as {@link #uiLanguage editor language}, it can be customized by passing an optional\n\t\t * argument to the `Locale` constructor.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.contentLanguage = options.contentLanguage || this.uiLanguage;\n\n\t\t/**\n\t\t * Text direction of the {@link #uiLanguage editor UI language}. Either `'ltr'` or `'rtl'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.uiLanguageDirection = getLanguageDirection( this.uiLanguage );\n\n\t\t/**\n\t\t * Text direction of the {@link #contentLanguage editor content language}.\n\t\t *\n\t\t * If the content language was passed directly to the `Locale` constructor, this property represents the\n\t\t * direction of that language.\n\t\t *\n\t\t * If the {@link #contentLanguage editor content language} was derived from the {@link #uiLanguage editor language},\n\t\t * the content language direction is the same as the {@link #uiLanguageDirection UI language direction}.\n\t\t *\n\t\t * The value is either `'ltr'` or `'rtl'`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.contentLanguageDirection = getLanguageDirection( this.contentLanguage );\n\n\t\t/**\n\t\t * Translates the given string to the {@link #uiLanguage}. This method is also available in\n\t\t * {@link module:core/editor/editor~Editor#t} and {@link module:ui/view~View#t}.\n\t\t *\n\t\t * The strings may contain placeholders (`%<index>`) for values which are passed as the second argument.\n\t\t * `<index>` is the index in the `values` array.\n\t\t *\n\t\t *\t\teditor.t( 'Created file \"%0\" in %1ms.', [ fileName, timeTaken ] );\n\t\t *\n\t\t * This method's context is statically bound to Locale instance,\n\t\t * so it can be called as a function:\n\t\t *\n\t\t *\t\tconst t = this.t;\n\t\t *\t\tt( 'Label' );\n\t\t *\n\t\t * @method #t\n\t\t * @param {String} str The string to translate.\n\t\t * @param {String[]} [values] Values that should be used to interpolate the string.\n\t\t */\n\t\tthis.t = ( ...args ) => this._t( ...args );\n\t}\n\n\t/**\n\t * The editor UI language code in the [ISO 639-1](https://en.wikipedia.org/wiki/ISO_639-1) format.\n\t *\n\t * **Note**: This property has been deprecated. Please use {@link #uiLanguage} and {@link #contentLanguage}\n\t * properties instead.\n\t *\n\t * @deprecated\n\t * @member {String}\n\t */\n\tget language() {\n\t\t/**\n\t\t * The {@link module:utils/locale~Locale#language `Locale#language`} property has been deprecated and will\n\t\t * be removed in the near future. Please use {@link #uiLanguage} and {@link #contentLanguage} properties instead.\n\t\t *\n\t\t * @error locale-deprecated-language-property\n\t\t */\n\t\tconsole.warn(\n\t\t\t'locale-deprecated-language-property: ' +\n\t\t\t'The Locale#language property has been deprecated and will be removed in the near future. ' +\n\t\t\t'Please use #uiLanguage and #contentLanguage properties instead.' );\n\n\t\treturn this.uiLanguage;\n\t}\n\n\t/**\n\t * Base for the {@link #t} method.\n\t *\n\t * @private\n\t */\n\t_t( str, values ) {\n\t\tlet translatedString = translate( this.uiLanguage, str );\n\n\t\tif ( values ) {\n\t\t\ttranslatedString = translatedString.replace( /%(\\d+)/g, ( match, index ) => {\n\t\t\t\treturn ( index < values.length ) ? values[ index ] : match;\n\t\t\t} );\n\t\t}\n\n\t\treturn translatedString;\n\t}\n}\n\n// Helps determine whether a language is LTR or RTL.\n//\n// @param {String} language The ISO 639-1 language code.\n// @returns {String} 'ltr' or 'rtl\nfunction getLanguageDirection( languageCode ) {\n\treturn RTL_LANGUAGE_CODES.includes( languageCode ) ? 'rtl' : 'ltr';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/viewconsumable\n */\n\nimport { isArray } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Class used for handling consumption of view {@link module:engine/view/element~Element elements},\n * {@link module:engine/view/text~Text text nodes} and {@link module:engine/view/documentfragment~DocumentFragment document fragments}.\n * Element's name and its parts (attributes, classes and styles) can be consumed separately. Consuming an element's name\n * does not consume its attributes, classes and styles.\n * To add items for consumption use {@link module:engine/conversion/viewconsumable~ViewConsumable#add add method}.\n * To test items use {@link module:engine/conversion/viewconsumable~ViewConsumable#test test method}.\n * To consume items use {@link module:engine/conversion/viewconsumable~ViewConsumable#consume consume method}.\n * To revert already consumed items use {@link module:engine/conversion/viewconsumable~ViewConsumable#revert revert method}.\n *\n *\t\tviewConsumable.add( element, { name: true } ); // Adds element's name as ready to be consumed.\n *\t\tviewConsumable.add( textNode ); // Adds text node for consumption.\n *\t\tviewConsumable.add( docFragment ); // Adds document fragment for consumption.\n *\t\tviewConsumable.test( element, { name: true } ); // Tests if element's name can be consumed.\n *\t\tviewConsumable.test( textNode ); // Tests if text node can be consumed.\n *\t\tviewConsumable.test( docFragment ); // Tests if document fragment can be consumed.\n *\t\tviewConsumable.consume( element, { name: true } ); // Consume element's name.\n *\t\tviewConsumable.consume( textNode ); // Consume text node.\n *\t\tviewConsumable.consume( docFragment ); // Consume document fragment.\n *\t\tviewConsumable.revert( element, { name: true } ); // Revert already consumed element's name.\n *\t\tviewConsumable.revert( textNode ); // Revert already consumed text node.\n *\t\tviewConsumable.revert( docFragment ); // Revert already consumed document fragment.\n */\nexport default class ViewConsumable {\n\t/**\n\t * Creates new ViewConsumable.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Map of consumable elements. If {@link module:engine/view/element~Element element} is used as a key,\n\t\t * {@link module:engine/conversion/viewconsumable~ViewElementConsumables ViewElementConsumables} instance is stored as value.\n\t\t * For {@link module:engine/view/text~Text text nodes} and\n\t\t * {@link module:engine/view/documentfragment~DocumentFragment document fragments} boolean value is stored as value.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<module:engine/conversion/viewconsumable~ViewElementConsumables|Boolean>}\n\t\t*/\n\t\tthis._consumables = new Map();\n\t}\n\n\t/**\n\t * Adds {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} as ready to be consumed.\n\t *\n\t *\t\tviewConsumable.add( p, { name: true } ); // Adds element's name to consume.\n\t *\t\tviewConsumable.add( p, { attributes: 'name' } ); // Adds element's attribute.\n\t *\t\tviewConsumable.add( p, { classes: 'foobar' } ); // Adds element's class.\n\t *\t\tviewConsumable.add( p, { styles: 'color' } ); // Adds element's style\n\t *\t\tviewConsumable.add( p, { attributes: 'name', styles: 'color' } ); // Adds attribute and style.\n\t *\t\tviewConsumable.add( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be provided.\n\t *\t\tviewConsumable.add( textNode ); // Adds text node to consume.\n\t *\t\tviewConsumable.add( docFragment ); // Adds document fragment to consume.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * attribute is provided - it should be handled separately by providing actual style/class.\n\t *\n\t *\t\tviewConsumable.add( p, { attributes: 'style' } ); // This call will throw an exception.\n\t *\t\tviewConsumable.add( p, { styles: 'color' } ); // This is properly handled style.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t */\n\tadd( element, consumables ) {\n\t\tlet elementConsumables;\n\n\t\t// For text nodes and document fragments just mark them as consumable.\n\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\tthis._consumables.set( element, true );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// For elements create new ViewElementConsumables or update already existing one.\n\t\tif ( !this._consumables.has( element ) ) {\n\t\t\telementConsumables = new ViewElementConsumables();\n\t\t\tthis._consumables.set( element, elementConsumables );\n\t\t} else {\n\t\t\telementConsumables = this._consumables.get( element );\n\t\t}\n\n\t\telementConsumables.add( consumables );\n\t}\n\n\t/**\n\t * Tests if {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} can be consumed.\n\t * It returns `true` when all items included in method's call can be consumed. Returns `false` when\n\t * first already consumed item is found and `null` when first non-consumable item is found.\n\t *\n\t *\t\tviewConsumable.test( p, { name: true } ); // Tests element's name.\n\t *\t\tviewConsumable.test( p, { attributes: 'name' } ); // Tests attribute.\n\t *\t\tviewConsumable.test( p, { classes: 'foobar' } ); // Tests class.\n\t *\t\tviewConsumable.test( p, { styles: 'color' } ); // Tests style.\n\t *\t\tviewConsumable.test( p, { attributes: 'name', styles: 'color' } ); // Tests attribute and style.\n\t *\t\tviewConsumable.test( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be tested.\n\t *\t\tviewConsumable.test( textNode ); // Tests text node.\n\t *\t\tviewConsumable.test( docFragment ); // Tests document fragment.\n\t *\n\t * Testing classes and styles as attribute will test if all added classes/styles can be consumed.\n\t *\n\t *\t\tviewConsumable.test( p, { attributes: 'class' } ); // Tests if all added classes can be consumed.\n\t *\t\tviewConsumable.test( p, { attributes: 'style' } ); // Tests if all added styles can be consumed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t * @returns {Boolean|null} Returns `true` when all items included in method's call can be consumed. Returns `false`\n\t * when first already consumed item is found and `null` when first non-consumable item is found.\n\t */\n\ttest( element, consumables ) {\n\t\tconst elementConsumables = this._consumables.get( element );\n\n\t\tif ( elementConsumables === undefined ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// For text nodes and document fragments return stored boolean value.\n\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\treturn elementConsumables;\n\t\t}\n\n\t\t// For elements test consumables object.\n\t\treturn elementConsumables.test( consumables );\n\t}\n\n\t/**\n\t * Consumes {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t * It returns `true` when all items included in method's call can be consumed, otherwise returns `false`.\n\t *\n\t *\t\tviewConsumable.consume( p, { name: true } ); // Consumes element's name.\n\t *\t\tviewConsumable.consume( p, { attributes: 'name' } ); // Consumes element's attribute.\n\t *\t\tviewConsumable.consume( p, { classes: 'foobar' } ); // Consumes element's class.\n\t *\t\tviewConsumable.consume( p, { styles: 'color' } ); // Consumes element's style.\n\t *\t\tviewConsumable.consume( p, { attributes: 'name', styles: 'color' } ); // Consumes attribute and style.\n\t *\t\tviewConsumable.consume( p, { classes: [ 'baz', 'bar' ] } ); // Multiple consumables can be consumed.\n\t *\t\tviewConsumable.consume( textNode ); // Consumes text node.\n\t *\t\tviewConsumable.consume( docFragment ); // Consumes document fragment.\n\t *\n\t * Consuming classes and styles as attribute will test if all added classes/styles can be consumed.\n\t *\n\t *\t\tviewConsumable.consume( p, { attributes: 'class' } ); // Consume only if all added classes can be consumed.\n\t *\t\tviewConsumable.consume( p, { attributes: 'style' } ); // Consume only if all added styles can be consumed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t * @returns {Boolean} Returns `true` when all items included in method's call can be consumed,\n\t * otherwise returns `false`.\n\t */\n\tconsume( element, consumables ) {\n\t\tif ( this.test( element, consumables ) ) {\n\t\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\t\t// For text nodes and document fragments set value to false.\n\t\t\t\tthis._consumables.set( element, false );\n\t\t\t} else {\n\t\t\t\t// For elements - consume consumables object.\n\t\t\t\tthis._consumables.get( element ).consume( consumables );\n\t\t\t}\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Reverts {@link module:engine/view/element~Element view element}, {@link module:engine/view/text~Text text node} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment document fragment} so they can be consumed once again.\n\t * Method does not revert items that were never previously added for consumption, even if they are included in\n\t * method's call.\n\t *\n\t *\t\tviewConsumable.revert( p, { name: true } ); // Reverts element's name.\n\t *\t\tviewConsumable.revert( p, { attributes: 'name' } ); // Reverts element's attribute.\n\t *\t\tviewConsumable.revert( p, { classes: 'foobar' } ); // Reverts element's class.\n\t *\t\tviewConsumable.revert( p, { styles: 'color' } ); // Reverts element's style.\n\t *\t\tviewConsumable.revert( p, { attributes: 'name', styles: 'color' } ); // Reverts attribute and style.\n\t *\t\tviewConsumable.revert( p, { classes: [ 'baz', 'bar' ] } ); // Multiple names can be reverted.\n\t *\t\tviewConsumable.revert( textNode ); // Reverts text node.\n\t *\t\tviewConsumable.revert( docFragment ); // Reverts document fragment.\n\t *\n\t * Reverting classes and styles as attribute will revert all classes/styles that were previously added for\n\t * consumption.\n\t *\n\t *\t\tviewConsumable.revert( p, { attributes: 'class' } ); // Reverts all classes added for consumption.\n\t *\t\tviewConsumable.revert( p, { attributes: 'style' } ); // Reverts all styles added for consumption.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/text~Text|module:engine/view/documentfragment~DocumentFragment} element\n\t * @param {Object} [consumables] Used only if first parameter is {@link module:engine/view/element~Element view element} instance.\n\t * @param {Boolean} consumables.name If set to true element's name will be included.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names.\n\t */\n\trevert( element, consumables ) {\n\t\tconst elementConsumables = this._consumables.get( element );\n\n\t\tif ( elementConsumables !== undefined ) {\n\t\t\tif ( element.is( 'text' ) || element.is( 'documentFragment' ) ) {\n\t\t\t\t// For text nodes and document fragments - set consumable to true.\n\t\t\t\tthis._consumables.set( element, true );\n\t\t\t} else {\n\t\t\t\t// For elements - revert items from consumables object.\n\t\t\t\telementConsumables.revert( consumables );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates consumable object from {@link module:engine/view/element~Element view element}. Consumable object will include\n\t * element's name and all its attributes, classes and styles.\n\t *\n\t * @static\n\t * @param {module:engine/view/element~Element} element\n\t * @returns {Object} consumables\n\t */\n\tstatic consumablesFromElement( element ) {\n\t\tconst consumables = {\n\t\t\tname: true,\n\t\t\tattributes: [],\n\t\t\tclasses: [],\n\t\t\tstyles: []\n\t\t};\n\n\t\tconst attributes = element.getAttributeKeys();\n\n\t\tfor ( const attribute of attributes ) {\n\t\t\t// Skip classes and styles - will be added separately.\n\t\t\tif ( attribute == 'style' || attribute == 'class' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconsumables.attributes.push( attribute );\n\t\t}\n\n\t\tconst classes = element.getClassNames();\n\n\t\tfor ( const className of classes ) {\n\t\t\tconsumables.classes.push( className );\n\t\t}\n\n\t\tconst styles = element.getStyleNames();\n\n\t\tfor ( const style of styles ) {\n\t\t\tconsumables.styles.push( style );\n\t\t}\n\n\t\treturn consumables;\n\t}\n\n\t/**\n\t * Creates {@link module:engine/conversion/viewconsumable~ViewConsumable ViewConsumable} instance from\n\t * {@link module:engine/view/node~Node node} or {@link module:engine/view/documentfragment~DocumentFragment document fragment}.\n\t * Instance will contain all elements, child nodes, attributes, styles and classes added for consumption.\n\t *\n\t * @static\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} from View node or document fragment\n\t * from which `ViewConsumable` will be created.\n\t * @param {module:engine/conversion/viewconsumable~ViewConsumable} [instance] If provided, given `ViewConsumable` instance will be used\n\t * to add all consumables. It will be returned instead of a new instance.\n\t */\n\tstatic createFrom( from, instance ) {\n\t\tif ( !instance ) {\n\t\t\tinstance = new ViewConsumable();\n\t\t}\n\n\t\tif ( from.is( 'text' ) ) {\n\t\t\tinstance.add( from );\n\n\t\t\treturn instance;\n\t\t}\n\n\t\t// Add `from` itself, if it is an element.\n\t\tif ( from.is( 'element' ) ) {\n\t\t\tinstance.add( from, ViewConsumable.consumablesFromElement( from ) );\n\t\t}\n\n\t\tif ( from.is( 'documentFragment' ) ) {\n\t\t\tinstance.add( from );\n\t\t}\n\n\t\tfor ( const child of from.getChildren() ) {\n\t\t\tinstance = ViewConsumable.createFrom( child, instance );\n\t\t}\n\n\t\treturn instance;\n\t}\n}\n\n/**\n * This is a private helper-class for {@link module:engine/conversion/viewconsumable~ViewConsumable}.\n * It represents and manipulates consumable parts of a single {@link module:engine/view/element~Element}.\n *\n * @private\n */\nclass ViewElementConsumables {\n\t/**\n\t * Creates ViewElementConsumables instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Flag indicating if name of the element can be consumed.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._canConsumeName = null;\n\n\t\t/**\n\t\t * Contains maps of element's consumables: attributes, classes and styles.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._consumables = {\n\t\t\tattributes: new Map(),\n\t\t\tstyles: new Map(),\n\t\t\tclasses: new Map()\n\t\t};\n\t}\n\n\t/**\n\t * Adds consumable parts of the {@link module:engine/view/element~Element view element}.\n\t * Element's name itself can be marked to be consumed (when element's name is consumed its attributes, classes and\n\t * styles still could be consumed):\n\t *\n\t *\t\tconsumables.add( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.add( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.add( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * attribute is provided - it should be handled separately by providing `style` and `class` in consumables object.\n\t *\n\t * @param {Object} consumables Object describing which parts of the element can be consumed.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be added as consumable.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to add as consumable.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to add as consumable.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to add as consumable.\n\t */\n\tadd( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = true;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._add( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Tests if parts of the {@link module:engine/view/node~Node view node} can be consumed.\n\t *\n\t * Element's name can be tested:\n\t *\n\t *\t\tconsumables.test( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.test( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.test( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be tested.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be tested.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to test.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to test.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to test.\n\t * @returns {Boolean|null} `true` when all tested items can be consumed, `null` when even one of the items\n\t * was never marked for consumption and `false` when even one of the items was already consumed.\n\t */\n\ttest( consumables ) {\n\t\t// Check if name can be consumed.\n\t\tif ( consumables.name && !this._canConsumeName ) {\n\t\t\treturn this._canConsumeName;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tconst value = this._test( type, consumables[ type ] );\n\n\t\t\t\tif ( value !== true ) {\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Return true only if all can be consumed.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Consumes parts of {@link module:engine/view/element~Element view element}. This function does not check if consumable item\n\t * is already consumed - it consumes all consumable items provided.\n\t * Element's name can be consumed:\n\t *\n\t *\t\tconsumables.consume( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.consume( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.consume( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be consumed.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be consumed.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to consume.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to consume.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to consume.\n\t */\n\tconsume( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = false;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._consume( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Revert already consumed parts of {@link module:engine/view/element~Element view Element}, so they can be consumed once again.\n\t * Element's name can be reverted:\n\t *\n\t *\t\tconsumables.revert( { name: true } );\n\t *\n\t * Attributes classes and styles:\n\t *\n\t *\t\tconsumables.revert( { attributes: 'title', classes: 'foo', styles: 'color' } );\n\t *\t\tconsumables.revert( { attributes: [ 'title', 'name' ], classes: [ 'foo', 'bar' ] );\n\t *\n\t * @param {Object} consumables Object describing which parts of the element should be reverted.\n\t * @param {Boolean} consumables.name If set to `true` element's name will be reverted.\n\t * @param {String|Array.<String>} consumables.attributes Attribute name or array of attribute names to revert.\n\t * @param {String|Array.<String>} consumables.classes Class name or array of class names to revert.\n\t * @param {String|Array.<String>} consumables.styles Style name or array of style names to revert.\n\t */\n\trevert( consumables ) {\n\t\tif ( consumables.name ) {\n\t\t\tthis._canConsumeName = true;\n\t\t}\n\n\t\tfor ( const type in this._consumables ) {\n\t\t\tif ( type in consumables ) {\n\t\t\t\tthis._revert( type, consumables[ type ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that adds consumables of a given type: attribute, class or style.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `viewconsumable-invalid-attribute` when `class` or `style`\n\t * type is provided - it should be handled separately by providing actual style/class type.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_add( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\t/**\n\t\t\t\t * Class and style attributes should be handled separately in\n\t\t\t\t * {@link module:engine/conversion/viewconsumable~ViewConsumable#add `ViewConsumable#add()`}.\n\t\t\t\t *\n\t\t\t\t * What you have done is trying to use:\n\t\t\t\t *\n\t\t\t\t *\t\tconsumables.add( { attributes: [ 'class', 'style' ] } );\n\t\t\t\t *\n\t\t\t\t * While each class and style should be registered separately:\n\t\t\t\t *\n\t\t\t\t *\t\tconsumables.add( { classes: 'some-class', styles: 'font-weight' } );\n\t\t\t\t *\n\t\t\t\t * @error viewconsumable-invalid-attribute\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'viewconsumable-invalid-attribute: Classes and styles should be handled separately.', this );\n\t\t\t}\n\n\t\t\tconsumables.set( name, true );\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that tests consumables of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t * @returns {Boolean|null} Returns `true` if all items can be consumed, `null` when one of the items cannot be\n\t * consumed and `false` when one of the items is already consumed.\n\t */\n\t_test( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// Check all classes/styles if class/style attribute is tested.\n\t\t\t\tconst value = this._test( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\n\t\t\t\tif ( value !== true ) {\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst value = consumables.get( name );\n\t\t\t\t// Return null if attribute is not found.\n\t\t\t\tif ( value === undefined ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tif ( !value ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper method that consumes items of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_consume( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// If class or style is provided for consumption - consume them all.\n\t\t\t\tthis._consume( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\t\t\t} else {\n\t\t\t\tconsumables.set( name, false );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Helper method that reverts items of a given type: attribute, class or style.\n\t *\n\t * @private\n\t * @param {String} type Type of the consumable item: `attributes`, `classes` or , `styles`.\n\t * @param {String|Array.<String>} item Consumable item or array of items.\n\t */\n\t_revert( type, item ) {\n\t\tconst items = isArray( item ) ? item : [ item ];\n\t\tconst consumables = this._consumables[ type ];\n\n\t\tfor ( const name of items ) {\n\t\t\tif ( type === 'attributes' && ( name === 'class' || name === 'style' ) ) {\n\t\t\t\tconst consumableName = name == 'class' ? 'classes' : 'styles';\n\n\t\t\t\t// If class or style is provided for reverting - revert them all.\n\t\t\t\tthis._revert( consumableName, [ ...this._consumables[ consumableName ].keys() ] );\n\t\t\t} else {\n\t\t\t\tconst value = consumables.get( name );\n\n\t\t\t\tif ( value === false ) {\n\t\t\t\t\tconsumables.set( name, true );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/schema\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\nimport Range from './range';\nimport Position from './position';\nimport Element from './element';\nimport Text from './text';\nimport TreeWalker from './treewalker';\n\n/**\n * The model's schema. It defines allowed and disallowed structures of nodes as well as nodes' attributes.\n * The schema is usually defined by features and based on them the editing framework and features\n * make decisions how to change and process the model.\n *\n * The instance of schema is available in {@link module:engine/model/model~Model#schema `editor.model.schema`}.\n *\n * Read more about the schema in:\n *\n * * {@glink framework/guides/architecture/editing-engine#schema \"Schema\"} section of the\n * {@glink framework/guides/architecture/editing-engine Introduction to the \"Editing engine architecture\"}.\n * * {@glink framework/guides/deep-dive/schema \"Schema\" deep dive} guide.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Schema {\n\t/**\n\t * Creates schema instance.\n\t */\n\tconstructor() {\n\t\tthis._sourceDefinitions = {};\n\n\t\t/**\n\t\t * A dictionary containing attribute properties.\n\t\t *\n\t\t * @private\n\t\t * @member {Object.<String,String>}\n\t\t */\n\t\tthis._attributeProperties = {};\n\n\t\tthis.decorate( 'checkChild' );\n\t\tthis.decorate( 'checkAttribute' );\n\n\t\tthis.on( 'checkAttribute', ( evt, args ) => {\n\t\t\targs[ 0 ] = new SchemaContext( args[ 0 ] );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.on( 'checkChild', ( evt, args ) => {\n\t\t\targs[ 0 ] = new SchemaContext( args[ 0 ] );\n\t\t\targs[ 1 ] = this.getDefinition( args[ 1 ] );\n\t\t}, { priority: 'highest' } );\n\t}\n\n\t/**\n\t * Registers schema item. Can only be called once for every item name.\n\t *\n\t *\t\tschema.register( 'paragraph', {\n\t *\t\t\tinheritAllFrom: '$block'\n\t *\t\t} );\n\t *\n\t * @param {String} itemName\n\t * @param {module:engine/model/schema~SchemaItemDefinition} definition\n\t */\n\tregister( itemName, definition ) {\n\t\tif ( this._sourceDefinitions[ itemName ] ) {\n\t\t\t/**\n\t\t\t * A single item cannot be registered twice in the schema.\n\t\t\t *\n\t\t\t * This situation may happen when:\n\t\t\t *\n\t\t\t * * Two or more plugins called {@link #register `register()`} with the same name. This will usually mean that\n\t\t\t * there is a collision between plugins which try to use the same element in the model. Unfortunately,\n\t\t\t * the only way to solve this is by modifying one of these plugins to use a unique model element name.\n\t\t\t * * A single plugin was loaded twice. This happens when it is installed by npm/yarn in two versions\n\t\t\t * and usually means one or more of the following issues:\n\t\t\t * * a version mismatch (two of your dependencies require two different versions of this plugin),\n\t\t\t * * incorrect imports (this plugin is somehow imported twice in a way which confuses webpack),\n\t\t\t * * mess in `node_modules/` (`rm -rf node_modules/` may help).\n\t\t\t *\n\t\t\t * **Note:** Check the logged `itemName` to better understand which plugin was duplicated/conflicting.\n\t\t\t *\n\t\t\t * @param itemName The name of the model element that is being registered twice.\n\t\t\t * @error schema-cannot-register-item-twice\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'schema-cannot-register-item-twice: A single item cannot be registered twice in the schema.',\n\t\t\t\tthis,\n\t\t\t\t{\n\t\t\t\t\titemName\n\t\t\t\t}\n\t\t\t);\n\t\t}\n\n\t\tthis._sourceDefinitions[ itemName ] = [\n\t\t\tObject.assign( {}, definition )\n\t\t];\n\n\t\tthis._clearCache();\n\t}\n\n\t/**\n\t * Extends a {@link #register registered} item's definition.\n\t *\n\t * Extending properties such as `allowIn` will add more items to the existing properties,\n\t * while redefining properties such as `isBlock` will override the previously defined ones.\n\t *\n\t *\t\tschema.register( 'foo', {\n\t *\t\t\tallowIn: '$root',\n\t *\t\t\tisBlock: true;\n\t *\t\t} );\n\t *\t\tschema.extend( 'foo', {\n\t *\t\t\tallowIn: 'blockQuote',\n\t *\t\t\tisBlock: false\n\t *\t\t} );\n\t *\n\t *\t\tschema.getDefinition( 'foo' );\n\t *\t\t//\t{\n\t *\t\t//\t\tallowIn: [ '$root', 'blockQuote' ],\n\t *\t\t// \t\tisBlock: false\n\t *\t\t//\t}\n\t *\n\t * @param {String} itemName\n\t * @param {module:engine/model/schema~SchemaItemDefinition} definition\n\t */\n\textend( itemName, definition ) {\n\t\tif ( !this._sourceDefinitions[ itemName ] ) {\n\t\t\t/**\n\t\t\t * Cannot extend an item which was not registered yet.\n\t\t\t *\n\t\t\t * This error happens when a plugin tries to extend the schema definition of an item which was not\n\t\t\t * {@link #register registered} yet.\n\t\t\t *\n\t\t\t * @param itemName The name of the model element which is being extended.\n\t\t\t * @error schema-cannot-extend-missing-item\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'schema-cannot-extend-missing-item: Cannot extend an item which was not registered yet.', this, {\n\t\t\t\titemName\n\t\t\t} );\n\t\t}\n\n\t\tthis._sourceDefinitions[ itemName ].push( Object.assign( {}, definition ) );\n\n\t\tthis._clearCache();\n\t}\n\n\t/**\n\t * Returns all registered items.\n\t *\n\t * @returns {Object.<String,module:engine/model/schema~SchemaCompiledItemDefinition>}\n\t */\n\tgetDefinitions() {\n\t\tif ( !this._compiledDefinitions ) {\n\t\t\tthis._compile();\n\t\t}\n\n\t\treturn this._compiledDefinitions;\n\t}\n\n\t/**\n\t * Returns a definition of the given item or `undefined` if item is not registered.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t * @returns {module:engine/model/schema~SchemaCompiledItemDefinition}\n\t */\n\tgetDefinition( item ) {\n\t\tlet itemName;\n\n\t\tif ( typeof item == 'string' ) {\n\t\t\titemName = item;\n\t\t} else if ( item.is && ( item.is( 'text' ) || item.is( 'textProxy' ) ) ) {\n\t\t\titemName = '$text';\n\t\t}\n\t\t// Element or module:engine/model/schema~SchemaContextItem.\n\t\telse {\n\t\t\titemName = item.name;\n\t\t}\n\n\t\treturn this.getDefinitions()[ itemName ];\n\t}\n\n\t/**\n\t * Returns `true` if the given item is registered in the schema.\n\t *\n\t *\t\tschema.isRegistered( 'paragraph' ); // -> true\n\t *\t\tschema.isRegistered( editor.model.document.getRoot() ); // -> true\n\t *\t\tschema.isRegistered( 'foo' ); // -> false\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisRegistered( item ) {\n\t\treturn !!this.getDefinition( item );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * a block by {@link module:engine/model/schema~SchemaItemDefinition}'s `isBlock` property.\n\t *\n\t *\t\tschema.isBlock( 'paragraph' ); // -> true\n\t *\t\tschema.isBlock( '$root' ); // -> false\n\t *\n\t *\t\tconst paragraphElement = writer.createElement( 'paragraph' );\n\t *\t\tschema.isBlock( paragraphElement ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisBlock( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isBlock );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * a limit element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isLimit` or `isObject` property\n\t * (all objects are also limits).\n\t *\n\t *\t\tschema.isLimit( 'paragraph' ); // -> false\n\t *\t\tschema.isLimit( '$root' ); // -> true\n\t *\t\tschema.isLimit( editor.model.document.getRoot() ); // -> true\n\t *\t\tschema.isLimit( 'image' ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisLimit( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !!( def.isLimit || def.isObject );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * an object element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isObject` property.\n\t *\n\t *\t\tschema.isObject( 'paragraph' ); // -> false\n\t *\t\tschema.isObject( 'image' ); // -> true\n\t *\n\t *\t\tconst imageElement = writer.createElement( 'image' );\n\t *\t\tschema.isObject( imageElement ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisObject( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isObject );\n\t}\n\n\t/**\n\t * Returns `true` if the given item is defined to be\n\t * an inline element by {@link module:engine/model/schema~SchemaItemDefinition}'s `isInline` property.\n\t *\n\t *\t\tschema.isInline( 'paragraph' ); // -> false\n\t *\t\tschema.isInline( 'softBreak' ); // -> true\n\t *\n\t *\t\tconst text = writer.createText('foo' );\n\t *\t\tschema.isInline( text ); // -> true\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/schema~SchemaContextItem|String} item\n\t */\n\tisInline( item ) {\n\t\tconst def = this.getDefinition( item );\n\n\t\treturn !!( def && def.isInline );\n\t}\n\n\t/**\n\t * Checks whether the given node (`child`) can be a child of the given context.\n\t *\n\t *\t\tschema.checkChild( model.document.getRoot(), paragraph ); // -> false\n\t *\n\t *\t\tschema.register( 'paragraph', {\n\t *\t\t\tallowIn: '$root'\n\t *\t\t} );\n\t *\t\tschema.checkChild( model.document.getRoot(), paragraph ); // -> true\n\t *\n\t * Note: When verifying whether the given node can be a child of the given context, the\n\t * schema also verifies the entire context — from its root to its last element. Therefore, it is possible\n\t * for `checkChild()` to return `false` even though the context's last element can contain the checked child.\n\t * It happens if one of the context's elements does not allow its child.\n\t *\n\t * @fires checkChild\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context The context in which the child will be checked.\n\t * @param {module:engine/model/node~Node|String} def The child to check.\n\t */\n\tcheckChild( context, def ) {\n\t\t// Note: context and child are already normalized here to a SchemaContext and SchemaCompiledItemDefinition.\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this._checkContextMatch( def, context );\n\t}\n\n\t/**\n\t * Checks whether the given attribute can be applied in the given context (on the last\n\t * item of the context).\n\t *\n\t *\t\tschema.checkAttribute( textNode, 'bold' ); // -> false\n\t *\n\t *\t\tschema.extend( '$text', {\n\t *\t\t\tallowAttributes: 'bold'\n\t *\t\t} );\n\t *\t\tschema.checkAttribute( textNode, 'bold' ); // -> true\n\t *\n\t * @fires checkAttribute\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context The context in which the attribute will be checked.\n\t * @param {String} attributeName\n\t */\n\tcheckAttribute( context, attributeName ) {\n\t\tconst def = this.getDefinition( context.last );\n\n\t\tif ( !def ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn def.allowAttributes.includes( attributeName );\n\t}\n\n\t/**\n\t * Checks whether the given element (`elementToMerge`) can be merged with the specified base element (`positionOrBaseElement`).\n\t *\n\t * In other words — whether `elementToMerge`'s children {@link #checkChild are allowed} in the `positionOrBaseElement`.\n\t *\n\t * This check ensures that elements merged with {@link module:engine/model/writer~Writer#merge `Writer#merge()`}\n\t * will be valid.\n\t *\n\t * Instead of elements, you can pass the instance of the {@link module:engine/model/position~Position} class as the\n\t * `positionOrBaseElement`. It means that the elements before and after the position will be checked whether they can be merged.\n\t *\n\t * @param {module:engine/model/position~Position|module:engine/model/element~Element} positionOrBaseElement The position or base\n\t * element to which the `elementToMerge` will be merged.\n\t * @param {module:engine/model/element~Element} elementToMerge The element to merge. Required if `positionOrBaseElement` is an element.\n\t * @returns {Boolean}\n\t */\n\tcheckMerge( positionOrBaseElement, elementToMerge = null ) {\n\t\tif ( positionOrBaseElement instanceof Position ) {\n\t\t\tconst nodeBefore = positionOrBaseElement.nodeBefore;\n\t\t\tconst nodeAfter = positionOrBaseElement.nodeAfter;\n\n\t\t\tif ( !( nodeBefore instanceof Element ) ) {\n\t\t\t\t/**\n\t\t\t\t * The node before the merge position must be an element.\n\t\t\t\t *\n\t\t\t\t * @error schema-check-merge-no-element-before\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'schema-check-merge-no-element-before: The node before the merge position must be an element.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( !( nodeAfter instanceof Element ) ) {\n\t\t\t\t/**\n\t\t\t\t * The node after the merge position must be an element.\n\t\t\t\t *\n\t\t\t\t * @error schema-check-merge-no-element-after\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'schema-check-merge-no-element-after: The node after the merge position must be an element.',\n\t\t\t\t\tthis\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn this.checkMerge( nodeBefore, nodeAfter );\n\t\t}\n\n\t\tfor ( const child of elementToMerge.getChildren() ) {\n\t\t\tif ( !this.checkChild( positionOrBaseElement, child ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Allows registering a callback to the {@link #checkChild} method calls.\n\t *\n\t * Callbacks allow you to implement rules which are not otherwise possible to achieve\n\t * by using the declarative API of {@link module:engine/model/schema~SchemaItemDefinition}.\n\t * For example, by using this method you can disallow elements in specific contexts.\n\t *\n\t * This method is a shorthand for using the {@link #event:checkChild} event. For even better control,\n\t * you can use that event instead.\n\t *\n\t * Example:\n\t *\n\t *\t\t// Disallow heading1 directly inside a blockQuote.\n\t *\t\tschema.addChildCheck( ( context, childDefinition ) => {\n\t *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition.name == 'heading1' ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Which translates to:\n\t *\n\t *\t\tschema.on( 'checkChild', ( evt, args ) => {\n\t *\t\t\tconst context = args[ 0 ];\n\t *\t\t\tconst childDefinition = args[ 1 ];\n\t *\n\t *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition && childDefinition.name == 'heading1' ) {\n\t *\t\t\t\t// Prevent next listeners from being called.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t\t// Set the checkChild()'s return value.\n\t *\t\t\t\tevt.return = false;\n\t *\t\t\t}\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t * @param {Function} callback The callback to be called. It is called with two parameters:\n\t * {@link module:engine/model/schema~SchemaContext} (context) instance and\n\t * {@link module:engine/model/schema~SchemaCompiledItemDefinition} (child-to-check definition).\n\t * The callback may return `true/false` to override `checkChild()`'s return value. If it does not return\n\t * a boolean value, the default algorithm (or other callbacks) will define `checkChild()`'s return value.\n\t */\n\taddChildCheck( callback ) {\n\t\tthis.on( 'checkChild', ( evt, [ ctx, childDef ] ) => {\n\t\t\t// checkChild() was called with a non-registered child.\n\t\t\t// In 99% cases such check should return false, so not to overcomplicate all callbacks\n\t\t\t// don't even execute them.\n\t\t\tif ( !childDef ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst retValue = callback( ctx, childDef );\n\n\t\t\tif ( typeof retValue == 'boolean' ) {\n\t\t\t\tevt.stop();\n\t\t\t\tevt.return = retValue;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Allows registering a callback to the {@link #checkAttribute} method calls.\n\t *\n\t * Callbacks allow you to implement rules which are not otherwise possible to achieve\n\t * by using the declarative API of {@link module:engine/model/schema~SchemaItemDefinition}.\n\t * For example, by using this method you can disallow attribute if node to which it is applied\n\t * is contained within some other element (e.g. you want to disallow `bold` on `$text` within `heading1`).\n\t *\n\t * This method is a shorthand for using the {@link #event:checkAttribute} event. For even better control,\n\t * you can use that event instead.\n\t *\n\t * Example:\n\t *\n\t *\t\t// Disallow bold on $text inside heading1.\n\t *\t\tschema.addAttributeCheck( ( context, attributeName ) => {\n\t *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * Which translates to:\n\t *\n\t *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n\t *\t\t\tconst context = args[ 0 ];\n\t *\t\t\tconst attributeName = args[ 1 ];\n\t *\n\t *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n\t *\t\t\t\t// Prevent next listeners from being called.\n\t *\t\t\t\tevt.stop();\n\t *\t\t\t\t// Set the checkAttribute()'s return value.\n\t *\t\t\t\tevt.return = false;\n\t *\t\t\t}\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t * @param {Function} callback The callback to be called. It is called with two parameters:\n\t * {@link module:engine/model/schema~SchemaContext} (context) instance and attribute name.\n\t * The callback may return `true/false` to override `checkAttribute()`'s return value. If it does not return\n\t * a boolean value, the default algorithm (or other callbacks) will define `checkAttribute()`'s return value.\n\t */\n\taddAttributeCheck( callback ) {\n\t\tthis.on( 'checkAttribute', ( evt, [ ctx, attributeName ] ) => {\n\t\t\tconst retValue = callback( ctx, attributeName );\n\n\t\t\tif ( typeof retValue == 'boolean' ) {\n\t\t\t\tevt.stop();\n\t\t\t\tevt.return = retValue;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * This method allows assigning additional metadata to the model attributes. For example,\n\t * {@link module:engine/model/schema~AttributeProperties `AttributeProperties#isFormatting` property} is\n\t * used to mark formatting attributes (like `bold` or `italic`).\n\t *\n\t *\t\t// Mark bold as a formatting attribute.\n\t *\t\tschema.setAttributeProperties( 'bold', {\n\t *\t\t\tisFormatting: true\n\t *\t\t} );\n\t *\n\t *\t\t// Override code not to be considered a formatting markup.\n\t *\t\tschema.setAttributeProperties( 'code', {\n\t *\t\t\tisFormatting: false\n\t *\t\t} );\n\t *\n\t * Properties are not limited to members defined in the\n\t * {@link module:engine/model/schema~AttributeProperties `AttributeProperties` type} and you can also use custom properties:\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\tcustomProperty: 'value'\n\t *\t\t} );\n\t *\n\t * Subsequent calls with the same attribute will extend its custom properties:\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\tone: 1\n\t *\t\t} );\n\t *\n\t *\t\tschema.setAttributeProperties( 'blockQuote', {\n\t *\t\t\ttwo: 2\n\t *\t\t} );\n\t *\n\t *\t\tconsole.log( schema.getAttributeProperties( 'blockQuote' ) );\n\t *\t\t// Logs: { one: 1, two: 2 }\n\t *\n\t * @param {String} attributeName A name of the attribute to receive the properties.\n\t * @param {module:engine/model/schema~AttributeProperties} properties A dictionary of properties.\n\t */\n\tsetAttributeProperties( attributeName, properties ) {\n\t\tthis._attributeProperties[ attributeName ] = Object.assign( this.getAttributeProperties( attributeName ), properties );\n\t}\n\n\t/**\n\t * Returns properties associated with a given model attribute. See {@link #setAttributeProperties `setAttributeProperties()`}.\n\t *\n\t * @param {String} attributeName A name of the attribute.\n\t * @returns {module:engine/model/schema~AttributeProperties}\n\t */\n\tgetAttributeProperties( attributeName ) {\n\t\treturn this._attributeProperties[ attributeName ] || {};\n\t}\n\n\t/**\n\t * Returns the lowest {@link module:engine/model/schema~Schema#isLimit limit element} containing the entire\n\t * selection/range/position or the root otherwise.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection|\n\t * module:engine/model/range~Range|module:engine/model/position~Position} selectionOrRangeOrPosition\n\t * The selection/range/position to check.\n\t * @returns {module:engine/model/element~Element} The lowest limit element containing\n\t * the entire `selectionOrRangeOrPosition`.\n\t */\n\tgetLimitElement( selectionOrRangeOrPosition ) {\n\t\tlet element;\n\n\t\tif ( selectionOrRangeOrPosition instanceof Position ) {\n\t\t\telement = selectionOrRangeOrPosition.parent;\n\t\t} else {\n\t\t\tconst ranges = selectionOrRangeOrPosition instanceof Range ?\n\t\t\t\t[ selectionOrRangeOrPosition ] :\n\t\t\t\tArray.from( selectionOrRangeOrPosition.getRanges() );\n\n\t\t\t// Find the common ancestor for all selection's ranges.\n\t\t\telement = ranges\n\t\t\t\t.reduce( ( element, range ) => {\n\t\t\t\t\tconst rangeCommonAncestor = range.getCommonAncestor();\n\n\t\t\t\t\tif ( !element ) {\n\t\t\t\t\t\treturn rangeCommonAncestor;\n\t\t\t\t\t}\n\n\t\t\t\t\treturn element.getCommonAncestor( rangeCommonAncestor, { includeSelf: true } );\n\t\t\t\t}, null );\n\t\t}\n\n\t\twhile ( !this.isLimit( element ) ) {\n\t\t\tif ( element.parent ) {\n\t\t\t\telement = element.parent;\n\t\t\t} else {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\treturn element;\n\t}\n\n\t/**\n\t * Checks whether the attribute is allowed in selection:\n\t *\n\t * * if the selection is not collapsed, then checks if the attribute is allowed on any of nodes in that range,\n\t * * if the selection is collapsed, then checks if on the selection position there's a text with the\n\t * specified attribute allowed.\n\t *\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * Selection which will be checked.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Boolean}\n\t */\n\tcheckAttributeInSelection( selection, attribute ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\t\t\tconst context = [\n\t\t\t\t...firstPosition.getAncestors(),\n\t\t\t\tnew Text( '', selection.getAttributes() )\n\t\t\t];\n\n\t\t\t// Check whether schema allows for a text with the attribute in the selection.\n\t\t\treturn this.checkAttribute( context, attribute );\n\t\t} else {\n\t\t\tconst ranges = selection.getRanges();\n\n\t\t\t// For all ranges, check nodes in them until you find a node that is allowed to have the attribute.\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tfor ( const value of range ) {\n\t\t\t\t\tif ( this.checkAttribute( value.item, attribute ) ) {\n\t\t\t\t\t\t// If we found a node that is allowed to have the attribute, return true.\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// If we haven't found such node, return false.\n\t\treturn false;\n\t}\n\n\t/**\n\t * Transforms the given set of ranges into a set of ranges where the given attribute is allowed (and can be applied).\n\t *\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to be validated.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Iterable.<module:engine/model/range~Range>} Ranges in which the attribute is allowed.\n\t */\n\t* getValidRanges( ranges, attribute ) {\n\t\tranges = convertToMinimalFlatRanges( ranges );\n\n\t\tfor ( const range of ranges ) {\n\t\t\tyield* this._getValidRangesForRange( range, attribute );\n\t\t}\n\t}\n\n\t/**\n\t * Basing on given `position`, finds and returns a {@link module:engine/model/range~Range range} which is\n\t * nearest to that `position` and is a correct range for selection.\n\t *\n\t * The correct selection range might be collapsed when it is located in a position where the text node can be placed.\n\t * Non-collapsed range is returned when selection can be placed around element marked as an \"object\" in\n\t * the {@link module:engine/model/schema~Schema schema}.\n\t *\n\t * Direction of searching for the nearest correct selection range can be specified as:\n\t *\n\t * * `both` - searching will be performed in both ways,\n\t * * `forward` - searching will be performed only forward,\n\t * * `backward` - searching will be performed only backward.\n\t *\n\t * When valid selection range cannot be found, `null` is returned.\n\t *\n\t * @param {module:engine/model/position~Position} position Reference position where new selection range should be looked for.\n\t * @param {'both'|'forward'|'backward'} [direction='both'] Search direction.\n\t * @returns {module:engine/model/range~Range|null} Nearest selection range or `null` if one cannot be found.\n\t */\n\tgetNearestSelectionRange( position, direction = 'both' ) {\n\t\t// Return collapsed range if provided position is valid.\n\t\tif ( this.checkChild( position, '$text' ) ) {\n\t\t\treturn new Range( position );\n\t\t}\n\n\t\tlet backwardWalker, forwardWalker;\n\n\t\tif ( direction == 'both' || direction == 'backward' ) {\n\t\t\tbackwardWalker = new TreeWalker( { startPosition: position, direction: 'backward' } );\n\t\t}\n\n\t\tif ( direction == 'both' || direction == 'forward' ) {\n\t\t\tforwardWalker = new TreeWalker( { startPosition: position } );\n\t\t}\n\n\t\tfor ( const data of combineWalkers( backwardWalker, forwardWalker ) ) {\n\t\t\tconst type = ( data.walker == backwardWalker ? 'elementEnd' : 'elementStart' );\n\t\t\tconst value = data.value;\n\n\t\t\tif ( value.type == type && this.isObject( value.item ) ) {\n\t\t\t\treturn Range._createOn( value.item );\n\t\t\t}\n\n\t\t\tif ( this.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\t\treturn new Range( value.nextPosition );\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Tries to find position ancestors that allows to insert given node.\n\t * It starts searching from the given position and goes node by node to the top of the model tree\n\t * as long as {@link module:engine/model/schema~Schema#isLimit limit element},\n\t * {@link module:engine/model/schema~Schema#isObject object element} or top-most ancestor won't be reached.\n\t *\n\t * @params {module:engine/model/position~Position} position Position from searching will start.\n\t * @params {module:engine/model/node~Node|String} node Node for which allowed parent should be found or its name.\n\t * @returns {module:engine/model/element~Element|null} element Allowed parent or null if nothing was found.\n\t */\n\tfindAllowedParent( position, node ) {\n\t\tlet parent = position.parent;\n\n\t\twhile ( parent ) {\n\t\t\tif ( this.checkChild( parent, node ) ) {\n\t\t\t\treturn parent;\n\t\t\t}\n\n\t\t\t// Do not split limit elements.\n\t\t\tif ( this.isLimit( parent ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Removes attributes disallowed by the schema.\n\t *\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes that will be filtered.\n\t * @param {module:engine/model/writer~Writer} writer\n\t */\n\tremoveDisallowedAttributes( nodes, writer ) {\n\t\tfor ( const node of nodes ) {\n\t\t\t// When node is a `Text` it has no children, so just filter it out.\n\t\t\tif ( node.is( 'text' ) ) {\n\t\t\t\tremoveDisallowedAttributeFromNode( this, node, writer );\n\t\t\t}\n\t\t\t// In a case of `Element` iterates through positions between nodes inside this element\n\t\t\t// and filter out node before the current position, or position parent when position\n\t\t\t// is at start of an element. Using positions prevent from omitting merged nodes\n\t\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/1789.\n\t\t\telse {\n\t\t\t\tconst rangeInNode = Range._createIn( node );\n\t\t\t\tconst positionsInRange = rangeInNode.getPositions();\n\n\t\t\t\tfor ( const position of positionsInRange ) {\n\t\t\t\t\tconst item = position.nodeBefore || position.parent;\n\n\t\t\t\t\tremoveDisallowedAttributeFromNode( this, item, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates an instance of the schema context.\n\t *\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context\n\t * @returns {module:engine/model/schema~SchemaContext}\n\t */\n\tcreateContext( context ) {\n\t\treturn new SchemaContext( context );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_clearCache() {\n\t\tthis._compiledDefinitions = null;\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_compile() {\n\t\tconst compiledDefinitions = {};\n\t\tconst sourceRules = this._sourceDefinitions;\n\t\tconst itemNames = Object.keys( sourceRules );\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompiledDefinitions[ itemName ] = compileBaseItemRule( sourceRules[ itemName ], itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowContentOf( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowWhere( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcompileAllowAttributesOf( compiledDefinitions, itemName );\n\t\t\tcompileInheritPropertiesFrom( compiledDefinitions, itemName );\n\t\t}\n\n\t\tfor ( const itemName of itemNames ) {\n\t\t\tcleanUpAllowIn( compiledDefinitions, itemName );\n\t\t\tcleanUpAllowAttributes( compiledDefinitions, itemName );\n\t\t}\n\n\t\tthis._compiledDefinitions = compiledDefinitions;\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/schema~SchemaCompiledItemDefinition} def\n\t * @param {module:engine/model/schema~SchemaContext} context\n\t * @param {Number} contextItemIndex\n\t */\n\t_checkContextMatch( def, context, contextItemIndex = context.length - 1 ) {\n\t\tconst contextItem = context.getItem( contextItemIndex );\n\n\t\tif ( def.allowIn.includes( contextItem.name ) ) {\n\t\t\tif ( contextItemIndex == 0 ) {\n\t\t\t\treturn true;\n\t\t\t} else {\n\t\t\t\tconst parentRule = this.getDefinition( contextItem );\n\n\t\t\t\treturn this._checkContextMatch( parentRule, context, contextItemIndex - 1 );\n\t\t\t}\n\t\t} else {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Takes a flat range and an attribute name. Traverses the range recursively and deeply to find and return all ranges\n\t * inside the given range on which the attribute can be applied.\n\t *\n\t * This is a helper function for {@link ~Schema#getValidRanges}.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range Range to process.\n\t * @param {String} attribute The name of the attribute to check.\n\t * @returns {Iterable.<module:engine/model/range~Range>} Ranges in which the attribute is allowed.\n\t */\n\t* _getValidRangesForRange( range, attribute ) {\n\t\tlet start = range.start;\n\t\tlet end = range.start;\n\n\t\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'element' ) ) {\n\t\t\t\tyield* this._getValidRangesForRange( Range._createIn( item ), attribute );\n\t\t\t}\n\n\t\t\tif ( !this.checkAttribute( item, attribute ) ) {\n\t\t\t\tif ( !start.isEqual( end ) ) {\n\t\t\t\t\tyield new Range( start, end );\n\t\t\t\t}\n\n\t\t\t\tstart = Position._createAfter( item );\n\t\t\t}\n\n\t\t\tend = Position._createAfter( item );\n\t\t}\n\n\t\tif ( !start.isEqual( end ) ) {\n\t\t\tyield new Range( start, end );\n\t\t}\n\t}\n}\n\nmix( Schema, ObservableMixin );\n\n/**\n * Event fired when the {@link #checkChild} method is called. It allows plugging in\n * additional behavior – e.g. implementing rules which cannot be defined using the declarative\n * {@link module:engine/model/schema~SchemaItemDefinition} interface.\n *\n * **Note:** The {@link #addChildCheck} method is a more handy way to register callbacks. Internally,\n * it registers a listener to this event but comes with a simpler API and it is the recommended choice\n * in most of the cases.\n *\n * The {@link #checkChild} method fires an event because it is\n * {@link module:utils/observablemixin~ObservableMixin#decorate decorated} with it. Thanks to that you can\n * use this event in a various way, but the most important use case is overriding standard behaviour of the\n * `checkChild()` method. Let's see a typical listener template:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\t\t}, { priority: 'high' } );\n *\n * The listener is added with a `high` priority to be executed before the default method is really called. The `args` callback\n * parameter contains arguments passed to `checkChild( context, child )`. However, the `context` parameter is already\n * normalized to a {@link module:engine/model/schema~SchemaContext} instance and `child` to a\n * {@link module:engine/model/schema~SchemaCompiledItemDefinition} instance, so you don't have to worry about\n * the various ways how `context` and `child` may be passed to `checkChild()`.\n *\n * **Note:** `childDefinition` may be `undefined` if `checkChild()` was called with a non-registered element.\n *\n * So, in order to implement a rule \"disallow `heading1` in `blockQuote`\" you can add such a listener:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'blockQuote' ) && childDefinition && childDefinition.name == 'heading1' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkChild()'s return value.\n *\t\t\t\tevt.return = false;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * Allowing elements in specific contexts will be a far less common use case, because it's normally handled by\n * `allowIn` rule from {@link module:engine/model/schema~SchemaItemDefinition} but if you have a complex scenario\n * where `listItem` should be allowed only in element `foo` which must be in element `bar`, then this would be the way:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst childDefinition = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'bar foo' ) && childDefinition.name == 'listItem' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkChild()'s return value.\n *\t\t\t\tevt.return = true;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * @event checkChild\n * @param {Array} args The `checkChild()`'s arguments.\n */\n\n/**\n * Event fired when the {@link #checkAttribute} method is called. It allows plugging in\n * additional behavior – e.g. implementing rules which cannot be defined using the declarative\n * {@link module:engine/model/schema~SchemaItemDefinition} interface.\n *\n * **Note:** The {@link #addAttributeCheck} method is a more handy way to register callbacks. Internally,\n * it registers a listener to this event but comes with a simpler API and it is the recommended choice\n * in most of the cases.\n *\n * The {@link #checkAttribute} method fires an event because it's\n * {@link module:utils/observablemixin~ObservableMixin#decorate decorated} with it. Thanks to that you can\n * use this event in a various way, but the most important use case is overriding standard behaviour of the\n * `checkAttribute()` method. Let's see a typical listener template:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst attributeName = args[ 1 ];\n *\t\t}, { priority: 'high' } );\n *\n * The listener is added with a `high` priority to be executed before the default method is really called. The `args` callback\n * parameter contains arguments passed to `checkAttribute( context, attributeName )`. However, the `context` parameter is already\n * normalized to a {@link module:engine/model/schema~SchemaContext} instance, so you don't have to worry about\n * the various ways how `context` may be passed to `checkAttribute()`.\n *\n * So, in order to implement a rule \"disallow `bold` in a text which is in a `heading1` you can add such a listener:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst atributeName = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'heading1 $text' ) && attributeName == 'bold' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkAttribute()'s return value.\n *\t\t\t\tevt.return = false;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * Allowing attributes in specific contexts will be a far less common use case, because it's normally handled by\n * `allowAttributes` rule from {@link module:engine/model/schema~SchemaItemDefinition} but if you have a complex scenario\n * where `bold` should be allowed only in element `foo` which must be in element `bar`, then this would be the way:\n *\n *\t\tschema.on( 'checkAttribute', ( evt, args ) => {\n *\t\t\tconst context = args[ 0 ];\n *\t\t\tconst atributeName = args[ 1 ];\n *\n *\t\t\tif ( context.endsWith( 'bar foo $text' ) && attributeName == 'bold' ) {\n *\t\t\t\t// Prevent next listeners from being called.\n *\t\t\t\tevt.stop();\n *\t\t\t\t// Set the checkAttribute()'s return value.\n *\t\t\t\tevt.return = true;\n *\t\t\t}\n *\t\t}, { priority: 'high' } );\n *\n * @event checkAttribute\n * @param {Array} args The `checkAttribute()`'s arguments.\n */\n\n/**\n * A definition of a {@link module:engine/model/schema~Schema schema} item.\n *\n * You can define the following rules:\n *\n * * `allowIn` – A string or an array of strings. Defines in which other items this item will be allowed.\n * * `allowAttributes` – A string or an array of strings. Defines allowed attributes of the given item.\n * * `allowContentOf` – A string or an array of strings. Inherits \"allowed children\" from other items.\n * * `allowWhere` – A string or an array of strings. Inherits \"allowed in\" from other items.\n * * `allowAttributesOf` – A string or an array of strings. Inherits attributes from other items.\n * * `inheritTypesFrom` – A string or an array of strings. Inherits `is*` properties of other items.\n * * `inheritAllFrom` – A string. A shorthand for `allowContentOf`, `allowWhere`, `allowAttributesOf`, `inheritTypesFrom`.\n * * Additionally, you can define the following `is*` properties: `isBlock`, `isLimit`, `isObject`, `isInline`. Read about them below.\n *\n * # The is* properties\n *\n * There are 3 commonly used `is*` properties. Their role is to assign additional semantics to schema items.\n * You can define more properties but you will also need to implement support for them in the existing editor features.\n *\n * * `isBlock` – Whether this item is paragraph-like. Generally speaking, content is usually made out of blocks\n * like paragraphs, list items, images, headings, etc. All these elements are marked as blocks. A block\n * should not allow another block inside. Note: There is also the `$block` generic item which has `isBlock` set to `true`.\n * Most block type items will inherit from `$block` (through `inheritAllFrom`).\n * * `isLimit` – It can be understood as whether this element should not be split by <kbd>Enter</kbd>.\n * Examples of limit elements: `$root`, table cell, image caption, etc. In other words, all actions that happen inside\n * a limit element are limited to its content. **Note:** All objects (`isObject`) are treated as limit elements, too.\n * * `isObject` – Whether an item is \"self-contained\" and should be treated as a whole. Examples of object elements:\n * `image`, `table`, `video`, etc. **Note:** An object is also a limit, so\n * {@link module:engine/model/schema~Schema#isLimit `isLimit()`} returns `true` for object elements automatically.\n * * `isInline` – Whether an item is \"text-like\" and should be treated as an inline node. Examples of inline elements:\n * `$text`, `softBreak` (`<br>`), etc.\n *\n * # Generic items\n *\n * There are three basic generic items: `$root`, `$block` and `$text`.\n * They are defined as follows:\n *\n *\t\tthis.schema.register( '$root', {\n *\t\t\tisLimit: true\n *\t\t} );\n *\t\tthis.schema.register( '$block', {\n *\t\t\tallowIn: '$root',\n *\t\t\tisBlock: true\n *\t\t} );\n *\t\tthis.schema.register( '$text', {\n *\t\t\tallowIn: '$block',\n *\t\t\tisInline: true\n *\t\t} );\n *\n * They reflect typical editor content that is contained within one root, consists of several blocks\n * (paragraphs, lists items, headings, images) which, in turn, may contain text inside.\n *\n * By inheriting from the generic items you can define new items which will get extended by other editor features.\n * Read more about generic types in the {@glink framework/guides/deep-dive/schema Defining schema} guide.\n *\n * # Example definitions\n *\n * Allow `paragraph` in roots and block quotes:\n *\n *\t\tschema.register( 'paragraph', {\n *\t\t\tallowIn: [ '$root', 'blockQuote' ],\n *\t\t\tisBlock: true\n *\t\t} );\n *\n * Allow `paragraph` everywhere where `$block` is allowed (i.e. in `$root`):\n *\n *\t\tschema.register( 'paragraph', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tisBlock: true\n *\t\t} );\n *\n * Make `image` a block object, which is allowed everywhere where `$block` is.\n * Also, allow `src` and `alt` attributes in it:\n *\n *\t\tschema.register( 'image', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tallowAttributes: [ 'src', 'alt' ],\n *\t\t\tisBlock: true,\n *\t\t\tisObject: true\n *\t\t} );\n *\n * Make `caption` allowed in `image` and make it allow all the content of `$block`s (usually, `$text`).\n * Also, mark it as a limit element so it cannot be split:\n *\n *\t\tschema.register( 'caption', {\n *\t\t\tallowIn: 'image',\n *\t\t\tallowContentOf: '$block',\n *\t\t\tisLimit: true\n *\t\t} );\n *\n * Make `listItem` inherit all from `$block` but also allow additional attributes:\n *\n *\t\tschema.register( 'listItem', {\n *\t\t\tinheritAllFrom: '$block',\n *\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n *\t\t} );\n *\n * Which translates to:\n *\n *\t\tschema.register( 'listItem', {\n *\t\t\tallowWhere: '$block',\n *\t\t\tallowContentOf: '$block',\n *\t\t\tallowAttributesOf: '$block',\n *\t\t\tinheritTypesFrom: '$block',\n *\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n *\t\t} );\n *\n * # Tips\n *\n * * Check schema definitions of existing features to see how they are defined.\n * * If you want to publish your feature so other developers can use it, try to use\n * generic items as much as possible.\n * * Keep your model clean. Limit it to the actual data and store information in a normalized way.\n * * Remember about definining the `is*` properties. They do not affect the allowed structures, but they can\n * affect how the editor features treat your elements.\n *\n * @typedef {Object} module:engine/model/schema~SchemaItemDefinition\n */\n\n/**\n * A simplified version of {@link module:engine/model/schema~SchemaItemDefinition} after\n * compilation by the {@link module:engine/model/schema~Schema schema}.\n * Rules fed to the schema by {@link module:engine/model/schema~Schema#register}\n * and {@link module:engine/model/schema~Schema#extend} methods are defined in the\n * {@link module:engine/model/schema~SchemaItemDefinition} format.\n * Later on, they are compiled to `SchemaCompiledItemDefition` so when you use e.g.\n * the {@link module:engine/model/schema~Schema#getDefinition} method you get the compiled version.\n *\n * The compiled version contains only the following properties:\n *\n * * The `name` property,\n * * The `is*` properties,\n * * The `allowIn` array,\n * * The `allowAttributes` array.\n *\n * @typedef {Object} module:engine/model/schema~SchemaCompiledItemDefinition\n */\n\n/**\n * A schema context — a list of ancestors of a given position in the document.\n *\n * Considering such position:\n *\n *\t\t<$root>\n *\t\t\t<blockQuote>\n *\t\t\t\t<paragraph>\n *\t\t\t\t\t^\n *\t\t\t\t</paragraph>\n *\t\t\t</blockQuote>\n *\t\t</$root>\n *\n * The context of this position is its {@link module:engine/model/position~Position#getAncestors lists of ancestors}:\n *\n *\t\t[ rootElement, blockQuoteElement, paragraphElement ]\n *\n * Contexts are used in the {@link module:engine/model/schema~Schema#event:checkChild `Schema#checkChild`} and\n * {@link module:engine/model/schema~Schema#event:checkAttribute `Schema#checkAttribute`} events as a definition\n * of a place in the document where the check occurs. The context instances are created based on the first arguments\n * of the {@link module:engine/model/schema~Schema#checkChild `Schema#checkChild()`} and\n * {@link module:engine/model/schema~Schema#checkAttribute `Schema#checkAttribute()`} methods so when\n * using these methods you need to use {@link module:engine/model/schema~SchemaContextDefinition}s.\n */\nexport class SchemaContext {\n\t/**\n\t * Creates an instance of the context.\n\t *\n\t * @param {module:engine/model/schema~SchemaContextDefinition} context\n\t */\n\tconstructor( context ) {\n\t\tif ( context instanceof SchemaContext ) {\n\t\t\treturn context;\n\t\t}\n\n\t\tif ( typeof context == 'string' ) {\n\t\t\tcontext = [ context ];\n\t\t} else if ( !Array.isArray( context ) ) {\n\t\t\t// `context` is item or position.\n\t\t\t// Position#getAncestors() doesn't accept any parameters but it works just fine here.\n\t\t\tcontext = context.getAncestors( { includeSelf: true } );\n\t\t}\n\n\t\tif ( context[ 0 ] && typeof context[ 0 ] != 'string' && context[ 0 ].is( 'documentFragment' ) ) {\n\t\t\tcontext.shift();\n\t\t}\n\n\t\tthis._items = context.map( mapContextItem );\n\t}\n\n\t/**\n\t * The number of items.\n\t *\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._items.length;\n\t}\n\n\t/**\n\t * The last item (the lowest node).\n\t *\n\t * @type {module:engine/model/schema~SchemaContextItem}\n\t */\n\tget last() {\n\t\treturn this._items[ this._items.length - 1 ];\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all context items.\n\t *\n\t * @returns {Iterable.<module:engine/model/schema~SchemaContextItem>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._items[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns a new schema context instance with an additional item.\n\t *\n\t * Item can be added as:\n\t *\n\t * \t\tconst context = new SchemaContext( [ '$root' ] );\n\t *\n\t * \t\t// An element.\n\t * \t\tconst fooElement = writer.createElement( 'fooElement' );\n\t * \t\tconst newContext = context.push( fooElement ); // [ '$root', 'fooElement' ]\n\t *\n\t * \t\t// A text node.\n\t * \t\tconst text = writer.createText( 'foobar' );\n\t * \t\tconst newContext = context.push( text ); // [ '$root', '$text' ]\n\t *\n\t * \t\t// A string (element name).\n\t * \t\tconst newContext = context.push( 'barElement' ); // [ '$root', 'barElement' ]\n\t *\n\t * **Note** {@link module:engine/model/node~Node} that is already in the model tree will be added as the only item\n\t * (without ancestors).\n\t *\n\t * @param {String|module:engine/model/node~Node|Array<String|module:engine/model/node~Node>} item An item that will be added\n\t * to the current context.\n\t * @returns {module:engine/model/schema~SchemaContext} A new schema context instance with an additional item.\n\t */\n\tpush( item ) {\n\t\tconst ctx = new SchemaContext( [ item ] );\n\n\t\tctx._items = [ ...this._items, ...ctx._items ];\n\n\t\treturn ctx;\n\t}\n\n\t/**\n\t * Gets an item on the given index.\n\t *\n\t * @returns {module:engine/model/schema~SchemaContextItem}\n\t */\n\tgetItem( index ) {\n\t\treturn this._items[ index ];\n\t}\n\n\t/**\n\t * Returns the names of items.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* getNames() {\n\t\tyield* this._items.map( item => item.name );\n\t}\n\n\t/**\n\t * Checks whether the context ends with the given nodes.\n\t *\n\t *\t\tconst ctx = new SchemaContext( [ rootElement, paragraphElement, textNode ] );\n\t *\n\t *\t\tctx.endsWith( '$text' ); // -> true\n\t *\t\tctx.endsWith( 'paragraph $text' ); // -> true\n\t *\t\tctx.endsWith( '$root' ); // -> false\n\t *\t\tctx.endsWith( 'paragraph' ); // -> false\n\t *\n\t * @param {String} query\n\t * @returns {Boolean}\n\t */\n\tendsWith( query ) {\n\t\treturn Array.from( this.getNames() ).join( ' ' ).endsWith( query );\n\t}\n}\n\n/**\n * The definition of a {@link module:engine/model/schema~SchemaContext schema context}.\n *\n * Contexts can be created in multiple ways:\n *\n * * By defining a **node** – in this cases this node and all its ancestors will be used.\n * * By defining a **position** in the document – in this case all its ancestors will be used.\n * * By defining an **array of nodes** – in this case this array defines the entire context.\n * * By defining a **name of node** - in this case node will be \"mocked\". It is not recommended because context\n * will be unrealistic (e.g. attributes of these nodes are not specified). However, at times this may be the only\n * way to define the context (e.g. when checking some hypothetical situation).\n * * By defining an **array of node names** (potentially, mixed with real nodes) – The same as **name of node**\n * but it is possible to create a path.\n * * By defining a {@link module:engine/model/schema~SchemaContext} instance - in this case the same instance as provided\n * will be return.\n *\n * Examples of context definitions passed to the {@link module:engine/model/schema~Schema#checkChild `Schema#checkChild()`}\n * method:\n *\n *\t\t// Assuming that we have a $root > blockQuote > paragraph structure, the following code\n *\t\t// will check node 'foo' in the following context:\n *\t\t// [ rootElement, blockQuoteElement, paragraphElement ]\n *\t\tconst contextDefinition = paragraphElement;\n * \t\tconst childToCheck = 'foo';\n *\t\tschema.checkChild( contextDefinition, childToCheck );\n *\n *\t\t// Also check in [ rootElement, blockQuoteElement, paragraphElement ].\n *\t\tschema.checkChild( model.createPositionAt( paragraphElement, 0 ), 'foo' );\n *\n *\t\t// Check in [ rootElement, paragraphElement ].\n *\t\tschema.checkChild( [ rootElement, paragraphElement ], 'foo' );\n *\n *\t\t// Check only fakeParagraphElement.\n *\t\tschema.checkChild( 'paragraph', 'foo' );\n *\n *\t\t// Check in [ fakeRootElement, fakeBarElement, paragraphElement ].\n *\t\tschema.checkChild( [ '$root', 'bar', paragraphElement ], 'foo' );\n *\n * All these `checkChild()` calls will fire {@link module:engine/model/schema~Schema#event:checkChild `Schema#checkChild`}\n * events in which `args[ 0 ]` is an instance of the context. Therefore, you can write a listener like this:\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst ctx = args[ 0 ];\n *\n *\t\t\tconsole.log( Array.from( ctx.getNames() ) );\n *\t\t} );\n *\n * Which will log the following:\n *\n *\t\t[ '$root', 'blockQuote', 'paragraph' ]\n *\t\t[ '$root', 'paragraph' ]\n *\t\t[ '$root', 'bar', 'paragraph' ]\n *\n * Note: When using the {@link module:engine/model/schema~Schema#checkAttribute `Schema#checkAttribute()`} method\n * you may want to check whether a text node may have an attribute. A {@link module:engine/model/text~Text} is a\n * correct way to define a context so you can do this:\n *\n *\t\tschema.checkAttribute( textNode, 'bold' );\n *\n * But sometimes you want to check whether a text at a given position might've had some attribute,\n * in which case you can create a context by mising an array of elements with a `'$text'` string:\n *\n *\t\t// Check in [ rootElement, paragraphElement, textNode ].\n *\t\tschema.checkChild( [ ...positionInParagraph.getAncestors(), '$text' ], 'bold' );\n *\n * @typedef {module:engine/model/node~Node|module:engine/model/position~Position|module:engine/model/schema~SchemaContext|\n * String|Array.<String|module:engine/model/node~Node>} module:engine/model/schema~SchemaContextDefinition\n */\n\n/**\n * An item of the {@link module:engine/model/schema~SchemaContext schema context}.\n *\n * It contains 3 properties:\n *\n * * `name` – the name of this item,\n * * `* getAttributeKeys()` – a generator of keys of item attributes,\n * * `getAttribute( keyName )` – a method to get attribute values.\n *\n * The context item interface is a highly simplified version of {@link module:engine/model/node~Node} and its role\n * is to expose only the information which schema checks are able to provide (which is the name of the node and\n * node's attributes).\n *\n *\t\tschema.on( 'checkChild', ( evt, args ) => {\n *\t\t\tconst ctx = args[ 0 ];\n *\t\t\tconst firstItem = ctx.getItem( 0 );\n *\n *\t\t\tconsole.log( firstItem.name ); // -> '$root'\n *\t\t\tconsole.log( firstItem.getAttribute( 'foo' ) ); // -> 'bar'\n *\t\t\tconsole.log( Array.from( firstItem.getAttributeKeys() ) ); // -> [ 'foo', 'faa' ]\n *\t\t} );\n *\n * @typedef {Object} module:engine/model/schema~SchemaContextItem\n */\n\n/**\n * A structure containing additional metadata describing the attribute.\n *\n * See {@link module:engine/model/schema~Schema#setAttributeProperties `Schema#setAttributeProperties()`} for usage examples.\n *\n * @typedef {Object} module:engine/model/schema~AttributeProperties\n * @property {Boolean} [isFormatting] Indicates that the attribute should be considered as a visual formatting, like `bold`, `italic` or\n * `fontSize` rather than semantic attribute (such as `src`, `listType`, etc.). For example, it is used by the \"Remove format\" feature.\n * @property {Boolean} [copyOnEnter] Indicates that given text attribute should be copied to the next block when enter is pressed.\n */\n\nfunction compileBaseItemRule( sourceItemRules, itemName ) {\n\tconst itemRule = {\n\t\tname: itemName,\n\n\t\tallowIn: [],\n\t\tallowContentOf: [],\n\t\tallowWhere: [],\n\n\t\tallowAttributes: [],\n\t\tallowAttributesOf: [],\n\n\t\tinheritTypesFrom: []\n\t};\n\n\tcopyTypes( sourceItemRules, itemRule );\n\n\tcopyProperty( sourceItemRules, itemRule, 'allowIn' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowContentOf' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowWhere' );\n\n\tcopyProperty( sourceItemRules, itemRule, 'allowAttributes' );\n\tcopyProperty( sourceItemRules, itemRule, 'allowAttributesOf' );\n\n\tcopyProperty( sourceItemRules, itemRule, 'inheritTypesFrom' );\n\n\tmakeInheritAllWork( sourceItemRules, itemRule );\n\n\treturn itemRule;\n}\n\nfunction compileAllowContentOf( compiledDefinitions, itemName ) {\n\tfor ( const allowContentOfItemName of compiledDefinitions[ itemName ].allowContentOf ) {\n\t\t// The allowContentOf property may point to an unregistered element.\n\t\tif ( compiledDefinitions[ allowContentOfItemName ] ) {\n\t\t\tconst allowedChildren = getAllowedChildren( compiledDefinitions, allowContentOfItemName );\n\n\t\t\tallowedChildren.forEach( allowedItem => {\n\t\t\t\tallowedItem.allowIn.push( itemName );\n\t\t\t} );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowContentOf;\n}\n\nfunction compileAllowWhere( compiledDefinitions, itemName ) {\n\tfor ( const allowWhereItemName of compiledDefinitions[ itemName ].allowWhere ) {\n\t\tconst inheritFrom = compiledDefinitions[ allowWhereItemName ];\n\n\t\t// The allowWhere property may point to an unregistered element.\n\t\tif ( inheritFrom ) {\n\t\t\tconst allowedIn = inheritFrom.allowIn;\n\n\t\t\tcompiledDefinitions[ itemName ].allowIn.push( ...allowedIn );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowWhere;\n}\n\nfunction compileAllowAttributesOf( compiledDefinitions, itemName ) {\n\tfor ( const allowAttributeOfItem of compiledDefinitions[ itemName ].allowAttributesOf ) {\n\t\tconst inheritFrom = compiledDefinitions[ allowAttributeOfItem ];\n\n\t\tif ( inheritFrom ) {\n\t\t\tconst inheritAttributes = inheritFrom.allowAttributes;\n\n\t\t\tcompiledDefinitions[ itemName ].allowAttributes.push( ...inheritAttributes );\n\t\t}\n\t}\n\n\tdelete compiledDefinitions[ itemName ].allowAttributesOf;\n}\n\nfunction compileInheritPropertiesFrom( compiledDefinitions, itemName ) {\n\tconst item = compiledDefinitions[ itemName ];\n\n\tfor ( const inheritPropertiesOfItem of item.inheritTypesFrom ) {\n\t\tconst inheritFrom = compiledDefinitions[ inheritPropertiesOfItem ];\n\n\t\tif ( inheritFrom ) {\n\t\t\tconst typeNames = Object.keys( inheritFrom ).filter( name => name.startsWith( 'is' ) );\n\n\t\t\tfor ( const name of typeNames ) {\n\t\t\t\tif ( !( name in item ) ) {\n\t\t\t\t\titem[ name ] = inheritFrom[ name ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tdelete item.inheritTypesFrom;\n}\n\n// Remove items which weren't registered (because it may break some checks or we'd need to complicate them).\n// Make sure allowIn doesn't contain repeated values.\nfunction cleanUpAllowIn( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\tconst existingItems = itemRule.allowIn.filter( itemToCheck => compiledDefinitions[ itemToCheck ] );\n\n\titemRule.allowIn = Array.from( new Set( existingItems ) );\n}\n\nfunction cleanUpAllowAttributes( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\n\titemRule.allowAttributes = Array.from( new Set( itemRule.allowAttributes ) );\n}\n\nfunction copyTypes( sourceItemRules, itemRule ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tconst typeNames = Object.keys( sourceItemRule ).filter( name => name.startsWith( 'is' ) );\n\n\t\tfor ( const name of typeNames ) {\n\t\t\titemRule[ name ] = sourceItemRule[ name ];\n\t\t}\n\t}\n}\n\nfunction copyProperty( sourceItemRules, itemRule, propertyName ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tif ( typeof sourceItemRule[ propertyName ] == 'string' ) {\n\t\t\titemRule[ propertyName ].push( sourceItemRule[ propertyName ] );\n\t\t} else if ( Array.isArray( sourceItemRule[ propertyName ] ) ) {\n\t\t\titemRule[ propertyName ].push( ...sourceItemRule[ propertyName ] );\n\t\t}\n\t}\n}\n\nfunction makeInheritAllWork( sourceItemRules, itemRule ) {\n\tfor ( const sourceItemRule of sourceItemRules ) {\n\t\tconst inheritFrom = sourceItemRule.inheritAllFrom;\n\n\t\tif ( inheritFrom ) {\n\t\t\titemRule.allowContentOf.push( inheritFrom );\n\t\t\titemRule.allowWhere.push( inheritFrom );\n\t\t\titemRule.allowAttributesOf.push( inheritFrom );\n\t\t\titemRule.inheritTypesFrom.push( inheritFrom );\n\t\t}\n\t}\n}\n\nfunction getAllowedChildren( compiledDefinitions, itemName ) {\n\tconst itemRule = compiledDefinitions[ itemName ];\n\n\treturn getValues( compiledDefinitions ).filter( def => def.allowIn.includes( itemRule.name ) );\n}\n\nfunction getValues( obj ) {\n\treturn Object.keys( obj ).map( key => obj[ key ] );\n}\n\nfunction mapContextItem( ctxItem ) {\n\tif ( typeof ctxItem == 'string' ) {\n\t\treturn {\n\t\t\tname: ctxItem,\n\n\t\t\t* getAttributeKeys() {},\n\n\t\t\tgetAttribute() {}\n\t\t};\n\t} else {\n\t\treturn {\n\t\t\t// '$text' means text nodes and text proxies.\n\t\t\tname: ctxItem.is( 'element' ) ? ctxItem.name : '$text',\n\n\t\t\t* getAttributeKeys() {\n\t\t\t\tyield* ctxItem.getAttributeKeys();\n\t\t\t},\n\n\t\t\tgetAttribute( key ) {\n\t\t\t\treturn ctxItem.getAttribute( key );\n\t\t\t}\n\t\t};\n\t}\n}\n\n// Generator function returning values from provided walkers, switching between them at each iteration. If only one walker\n// is provided it will return data only from that walker.\n//\n// @param {module:engine/module/treewalker~TreeWalker} [backward] Walker iterating in backward direction.\n// @param {module:engine/module/treewalker~TreeWalker} [forward] Walker iterating in forward direction.\n// @returns {Iterable.<Object>} Object returned at each iteration contains `value` and `walker` (informing which walker returned\n// given value) fields.\nfunction* combineWalkers( backward, forward ) {\n\tlet done = false;\n\n\twhile ( !done ) {\n\t\tdone = true;\n\n\t\tif ( backward ) {\n\t\t\tconst step = backward.next();\n\n\t\t\tif ( !step.done ) {\n\t\t\t\tdone = false;\n\t\t\t\tyield {\n\t\t\t\t\twalker: backward,\n\t\t\t\t\tvalue: step.value\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\tif ( forward ) {\n\t\t\tconst step = forward.next();\n\n\t\t\tif ( !step.done ) {\n\t\t\t\tdone = false;\n\t\t\t\tyield {\n\t\t\t\t\twalker: forward,\n\t\t\t\t\tvalue: step.value\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Takes an array of non-intersecting ranges. For each of them gets minimal flat ranges covering that range and returns\n// all those minimal flat ranges.\n//\n// @param {Array.<module:engine/model/range~Range>} ranges Ranges to process.\n// @returns {Iterable.<module:engine/model/range~Range>} Minimal flat ranges of given `ranges`.\nfunction* convertToMinimalFlatRanges( ranges ) {\n\tfor ( const range of ranges ) {\n\t\tyield* range.getMinimalFlatRanges();\n\t}\n}\n\nfunction removeDisallowedAttributeFromNode( schema, node, writer ) {\n\tfor ( const attribute of node.getAttributeKeys() ) {\n\t\tif ( !schema.checkAttribute( node, attribute ) ) {\n\t\t\twriter.removeAttribute( attribute, node );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/conversion/upcastdispatcher\n */\n\nimport ViewConsumable from './viewconsumable';\nimport ModelRange from '../model/range';\nimport ModelPosition from '../model/position';\nimport { SchemaContext } from '../model/schema';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * `UpcastDispatcher` is a central point of {@link module:engine/view/view view} conversion, which is a process of\n * converting given {@link module:engine/view/documentfragment~DocumentFragment view document fragment} or\n * {@link module:engine/view/element~Element} into another structure.\n * In default application, {@link module:engine/view/view view} is converted to {@link module:engine/model/model}.\n *\n * During conversion process, for all {@link module:engine/view/node~Node view nodes} from the converted view document fragment,\n * `UpcastDispatcher` fires corresponding events. Special callbacks called \"converters\" should listen to\n * `UpcastDispatcher` for those events.\n *\n * Each callback, as the second argument, is passed a special object `data` that has `viewItem`, `modelCursor` and\n * `modelRange` properties. `viewItem` property contains {@link module:engine/view/node~Node view node} or\n * {@link module:engine/view/documentfragment~DocumentFragment view document fragment}\n * that is converted at the moment and might be handled by the callback. `modelRange` property should be used to save the result\n * of conversion and is always a {@link module:engine/model/range~Range} when conversion result is correct.\n * `modelCursor` property is a {@link module:engine/model/position~Position position} on which conversion result will be inserted\n * and is a context according to {@link module:engine/model/schema~Schema schema} will be checked before the conversion.\n * See also {@link ~UpcastDispatcher#convert}. It is also shared by reference by all callbacks listening to given event.\n *\n * The third parameter passed to a callback is an instance of {@link ~UpcastDispatcher}\n * which provides additional tools for converters.\n *\n * Examples of providing callbacks for `UpcastDispatcher`:\n *\n *\t\t// Converter for links (<a>).\n *\t\teditor.data.upcastDispatcher.on( 'element:a', ( evt, data, conversionApi ) => {\n *\t\t\tif ( conversionApi.consumable.consume( data.viewItem, { name: true, attributes: [ 'href' ] } ) ) {\n *\t\t\t\t// <a> element is inline and is represented by an attribute in the model.\n *\t\t\t\t// This is why we need to convert only children.\n *\t\t\t\tconst { modelRange } = conversionApi.convertChildren( data.viewItem, data.modelCursor );\n *\n *\t\t\t\tfor ( let item of modelRange.getItems() ) {\n *\t\t\t\t\tif ( conversionApi.schema.checkAttribute( item, 'linkHref' ) ) {\n *\t\t\t\t\t\tconversionApi.writer.setAttribute( 'linkHref', data.viewItem.getAttribute( 'href' ), item );\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// Convert <p>'s font-size style.\n *\t\t// Note: You should use a low-priority observer in order to ensure that\n *\t\t// it's executed after the element-to-element converter.\n *\t\teditor.data.upcastDispatcher.on( 'element:p', ( evt, data, conversionApi ) => {\n *\t\t\tconst { consumable, schema, writer } = conversionApi;\n *\n *\t\t\tif ( !consumable.consume( data.viewItem, { style: 'font-size' } ) ) {\n *\t\t\t\treturn;\n *\t\t\t}\n *\n *\t\t\tconst fontSize = data.viewItem.getStyle( 'font-size' );\n *\n *\t\t\t// Don't go for the model element after data.modelCursor because it might happen\n *\t\t\t// that a single view element was converted to multiple model elements. Get all of them.\n *\t\t\tfor ( const item of data.modelRange.getItems( { shallow: true } ) ) {\n *\t\t\t\tif ( schema.checkAttribute( item, 'fontSize' ) ) {\n *\t\t\t\t\twriter.setAttribute( 'fontSize', fontSize, item );\n *\t\t\t\t}\n *\t\t\t}\n *\t\t}, { priority: 'low' } );\n *\n *\t\t// Convert all elements which have no custom converter into paragraph (autoparagraphing).\n * \teditor.data.upcastDispatcher.on( 'element', ( evt, data, conversionApi ) => {\n * \t \t// When element is already consumed by higher priority converters then do nothing.\n * \t \tif ( conversionApi.consumable.test( data.viewItem, { name: data.viewItem.name } ) ) {\n * \t \t\t\tconst paragraph = conversionApi.writer.createElement( 'paragraph' );\n *\n * \t \t\t\t// Find allowed parent for paragraph that we are going to insert. If current parent does not allow\n * \t \t\t\t// to insert paragraph but one of the ancestors does then split nodes to allowed parent.\n * \t \t\t\tconst splitResult = conversionApi.splitToAllowedParent( paragraph, data.modelCursor );\n *\n * \t \t\t\t// When there is no split result it means that we can't insert paragraph in this position.\n * \t \t\t\tif ( splitResult ) {\n * \t \t\t\t\t// Insert paragraph in allowed position.\n * \t \t\t\t\tconversionApi.writer.insert( paragraph, splitResult.position );\n *\n * \t \t\t\t\t// Convert children to paragraph.\n * \t \t\t\t\tconst { modelRange } = conversionApi.convertChildren(\n * \t \t\t\t\t\tdata.viewItem,\n * \t \t\t\t\t\tconversionApi.writer.createPositionAt( paragraph, 0 )\n * \t \t\t\t\t);\n *\n * \t\t\t\t\t\t// Set as conversion result, attribute converters may use this property.\n * \t \t\t\t\tdata.modelRange = conversionApi.writer.createRange(\n * \t \t\t\t\t\tconversionApi.writer.createPositionBefore( paragraph ),\n * \t \t\t\t\t\tmodelRange.end\n * \t \t\t\t\t);\n *\n * \t \t\t\t\t// Continue conversion inside paragraph.\n * \t \t\t\t\tdata.modelCursor = data.modelRange.end;\n * \t \t\t\t}\n * \t \t\t}\n * \t \t}\n * \t }, { priority: 'low' } );\n *\n * Before each conversion process, `UpcastDispatcher` fires {@link ~UpcastDispatcher#event:viewCleanup}\n * event which can be used to prepare tree view for conversion.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @fires viewCleanup\n * @fires element\n * @fires text\n * @fires documentFragment\n */\nexport default class UpcastDispatcher {\n\t/**\n\t * Creates a `UpcastDispatcher` that operates using passed API.\n\t *\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi\n\t * @param {Object} [conversionApi] Additional properties for interface that will be passed to events fired\n\t * by `UpcastDispatcher`.\n\t */\n\tconstructor( conversionApi = {} ) {\n\t\t/**\n\t\t * List of the elements that were created during splitting.\n\t\t *\n\t\t * After conversion process the list is cleared.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<module:engine/model/element~Element,Array.<module:engine/model/element~Element>>}\n\t\t */\n\t\tthis._splitParts = new Map();\n\n\t\t/**\n\t\t * Position in the temporary structure where the converted content is inserted. The structure reflect the context of\n\t\t * the target position where the content will be inserted. This property is build based on the context parameter of the\n\t\t * convert method.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/model/position~Position|null}\n\t\t */\n\t\tthis._modelCursor = null;\n\n\t\t/**\n\t\t * Interface passed by dispatcher to the events callbacks.\n\t\t *\n\t\t * @member {module:engine/conversion/upcastdispatcher~UpcastConversionApi}\n\t\t */\n\t\tthis.conversionApi = Object.assign( {}, conversionApi );\n\n\t\t// `convertItem`, `convertChildren` and `splitToAllowedParent` are bound to this `UpcastDispatcher`\n\t\t// instance and set on `conversionApi`. This way only a part of `UpcastDispatcher` API is exposed.\n\t\tthis.conversionApi.convertItem = this._convertItem.bind( this );\n\t\tthis.conversionApi.convertChildren = this._convertChildren.bind( this );\n\t\tthis.conversionApi.splitToAllowedParent = this._splitToAllowedParent.bind( this );\n\t\tthis.conversionApi.getSplitParts = this._getSplitParts.bind( this );\n\t}\n\n\t/**\n\t * Starts the conversion process. The entry point for the conversion.\n\t *\n\t * @fires element\n\t * @fires text\n\t * @fires documentFragment\n\t * @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/element~Element} viewItem\n\t * Part of the view to be converted.\n\t * @param {module:engine/model/writer~Writer} writer Instance of model writer.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context=['$root']] Elements will be converted according to this context.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Model data that is a result of the conversion process\n\t * wrapped in `DocumentFragment`. Converted marker elements will be set as that document fragment's\n\t * {@link module:engine/model/documentfragment~DocumentFragment#markers static markers map}.\n\t */\n\tconvert( viewItem, writer, context = [ '$root' ] ) {\n\t\tthis.fire( 'viewCleanup', viewItem );\n\n\t\t// Create context tree and set position in the top element.\n\t\t// Items will be converted according to this position.\n\t\tthis._modelCursor = createContextTree( context, writer );\n\n\t\t// Store writer in conversion as a conversion API\n\t\t// to be sure that conversion process will use the same batch.\n\t\tthis.conversionApi.writer = writer;\n\n\t\t// Create consumable values list for conversion process.\n\t\tthis.conversionApi.consumable = ViewConsumable.createFrom( viewItem );\n\n\t\t// Custom data stored by converter for conversion process.\n\t\tthis.conversionApi.store = {};\n\n\t\t// Do the conversion.\n\t\tconst { modelRange } = this._convertItem( viewItem, this._modelCursor );\n\n\t\t// Conversion result is always a document fragment so let's create it.\n\t\tconst documentFragment = writer.createDocumentFragment();\n\n\t\t// When there is a conversion result.\n\t\tif ( modelRange ) {\n\t\t\t// Remove all empty elements that were create while splitting.\n\t\t\tthis._removeEmptyElements();\n\n\t\t\t// Move all items that were converted in context tree to the document fragment.\n\t\t\tfor ( const item of Array.from( this._modelCursor.parent.getChildren() ) ) {\n\t\t\t\twriter.append( item, documentFragment );\n\t\t\t}\n\n\t\t\t// Extract temporary markers elements from model and set as static markers collection.\n\t\t\tdocumentFragment.markers = extractMarkersFromModelFragment( documentFragment, writer );\n\t\t}\n\n\t\t// Clear context position.\n\t\tthis._modelCursor = null;\n\n\t\t// Clear split elements lists.\n\t\tthis._splitParts.clear();\n\n\t\t// Clear conversion API.\n\t\tthis.conversionApi.writer = null;\n\t\tthis.conversionApi.store = null;\n\n\t\t// Return fragment as conversion result.\n\t\treturn documentFragment;\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#convertItem\n\t */\n\t_convertItem( viewItem, modelCursor ) {\n\t\tconst data = Object.assign( { viewItem, modelCursor, modelRange: null } );\n\n\t\tif ( viewItem.is( 'element' ) ) {\n\t\t\tthis.fire( 'element:' + viewItem.name, data, this.conversionApi );\n\t\t} else if ( viewItem.is( 'text' ) ) {\n\t\t\tthis.fire( 'text', data, this.conversionApi );\n\t\t} else {\n\t\t\tthis.fire( 'documentFragment', data, this.conversionApi );\n\t\t}\n\n\t\t// Handle incorrect conversion result.\n\t\tif ( data.modelRange && !( data.modelRange instanceof ModelRange ) ) {\n\t\t\t/**\n\t\t\t * Incorrect conversion result was dropped.\n\t\t\t *\n\t\t\t * {@link module:engine/model/range~Range Model range} should be a conversion result.\n\t\t\t *\n\t\t\t * @error view-conversion-dispatcher-incorrect-result\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-conversion-dispatcher-incorrect-result: Incorrect conversion result was dropped.', this );\n\t\t}\n\n\t\treturn { modelRange: data.modelRange, modelCursor: data.modelCursor };\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#convertChildren\n\t */\n\t_convertChildren( viewItem, modelCursor ) {\n\t\tconst modelRange = new ModelRange( modelCursor );\n\t\tlet nextModelCursor = modelCursor;\n\n\t\tfor ( const viewChild of Array.from( viewItem.getChildren() ) ) {\n\t\t\tconst result = this._convertItem( viewChild, nextModelCursor );\n\n\t\t\tif ( result.modelRange instanceof ModelRange ) {\n\t\t\t\tmodelRange.end = result.modelRange.end;\n\t\t\t\tnextModelCursor = result.modelCursor;\n\t\t\t}\n\t\t}\n\n\t\treturn { modelRange, modelCursor: nextModelCursor };\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#splitToAllowedParent\n\t */\n\t_splitToAllowedParent( node, modelCursor ) {\n\t\t// Try to find allowed parent.\n\t\tconst allowedParent = this.conversionApi.schema.findAllowedParent( modelCursor, node );\n\n\t\t// When there is no parent that allows to insert node then return `null`.\n\t\tif ( !allowedParent ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When current position parent allows to insert node then return this position.\n\t\tif ( allowedParent === modelCursor.parent ) {\n\t\t\treturn { position: modelCursor };\n\t\t}\n\n\t\t// When allowed parent is in context tree.\n\t\tif ( this._modelCursor.parent.getAncestors().includes( allowedParent ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Split element to allowed parent.\n\t\tconst splitResult = this.conversionApi.writer.split( modelCursor, allowedParent );\n\n\t\t// Using the range returned by `model.Writer#split`, we will pair original elements with their split parts.\n\t\t//\n\t\t// The range returned from the writer spans \"over the split\" or, precisely saying, from the end of the original element (the one\n\t\t// that got split) to the beginning of the other part of that element:\n\t\t//\n\t\t// <limit><a><b><c>X[]Y</c></b><a></limit> ->\n\t\t// <limit><a><b><c>X[</c></b></a><a><b><c>]Y</c></b></a>\n\t\t//\n\t\t// After the split there cannot be any full node between the positions in `splitRange`. The positions are touching.\n\t\t// Also, because of how splitting works, it is easy to notice, that \"closing tags\" are in the reverse order than \"opening tags\".\n\t\t// Also, since we split all those elements, each of them has to have the other part.\n\t\t//\n\t\t// With those observations in mind, we will pair the original elements with their split parts by saving \"closing tags\" and matching\n\t\t// them with \"opening tags\" in the reverse order. For that we can use a stack.\n\t\tconst stack = [];\n\n\t\tfor ( const treeWalkerValue of splitResult.range.getWalker() ) {\n\t\t\tif ( treeWalkerValue.type == 'elementEnd' ) {\n\t\t\t\tstack.push( treeWalkerValue.item );\n\t\t\t} else {\n\t\t\t\t// There should not be any text nodes after the element is split, so the only other value is `elementStart`.\n\t\t\t\tconst originalPart = stack.pop();\n\t\t\t\tconst splitPart = treeWalkerValue.item;\n\n\t\t\t\tthis._registerSplitPair( originalPart, splitPart );\n\t\t\t}\n\t\t}\n\n\t\treturn {\n\t\t\tposition: splitResult.position,\n\t\t\tcursorParent: splitResult.range.end.parent\n\t\t};\n\t}\n\n\t/**\n\t * Registers that `splitPart` element is a split part of the `originalPart` element.\n\t *\n\t * Data set by this method is used by {@link #_getSplitParts} and {@link #_removeEmptyElements}.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} originalPart\n\t * @param {module:engine/model/element~Element} splitPart\n\t */\n\t_registerSplitPair( originalPart, splitPart ) {\n\t\tif ( !this._splitParts.has( originalPart ) ) {\n\t\t\tthis._splitParts.set( originalPart, [ originalPart ] );\n\t\t}\n\n\t\tconst list = this._splitParts.get( originalPart );\n\n\t\tthis._splitParts.set( splitPart, list );\n\t\tlist.push( splitPart );\n\t}\n\n\t/**\n\t * @private\n\t * @see module:engine/conversion/upcastdispatcher~UpcastConversionApi#getSplitParts\n\t */\n\t_getSplitParts( element ) {\n\t\tlet parts;\n\n\t\tif ( !this._splitParts.has( element ) ) {\n\t\t\tparts = [ element ];\n\t\t} else {\n\t\t\tparts = this._splitParts.get( element );\n\t\t}\n\n\t\treturn parts;\n\t}\n\n\t/**\n\t * Checks if there are any empty elements created while splitting and removes them.\n\t *\n\t * This method works recursively to re-check empty elements again after at least one element was removed in the initial call,\n\t * as some elements might have become empty after other empty elements were removed from them.\n\t *\n\t * @private\n\t */\n\t_removeEmptyElements() {\n\t\tlet anyRemoved = false;\n\n\t\tfor ( const element of this._splitParts.keys() ) {\n\t\t\tif ( element.isEmpty ) {\n\t\t\t\tthis.conversionApi.writer.remove( element );\n\t\t\t\tthis._splitParts.delete( element );\n\n\t\t\t\tanyRemoved = true;\n\t\t\t}\n\t\t}\n\n\t\tif ( anyRemoved ) {\n\t\t\tthis._removeEmptyElements();\n\t\t}\n\t}\n\n\t/**\n\t * Fired before the first conversion event, at the beginning of upcast (view to model conversion) process.\n\t *\n\t * @event viewCleanup\n\t * @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/element~Element}\n\t * viewItem Part of the view to be converted.\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/element~Element} is converted.\n\t *\n\t * `element` is a namespace event for a class of events. Names of actually called events follow this pattern:\n\t * `element:<elementName>` where `elementName` is the name of converted element. This way listeners may listen to\n\t * all elements conversion or to conversion of specific elements.\n\t *\n\t * @event element\n\t * @param {Object} data Conversion data. Keep in mind that this object is shared by reference between all\n\t * callbacks that will be called. This means that callbacks can override values if needed, and those values will\n\t * be available in other callbacks.\n\t * @param {module:engine/view/item~Item} data.viewItem Converted item.\n\t * @param {module:engine/model/position~Position} data.modelCursor Position where a converter should start changes.\n\t * Change this value for the next converter to tell where the conversion should continue.\n\t * @param {module:engine/model/range~Range} data.modelRange The current state of conversion result. Every change to\n\t * converted element should be reflected by setting or modifying this property.\n\t * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion utilities to be used by callback.\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/text~Text} is converted.\n\t *\n\t * @event text\n\t * @see #event:element\n\t */\n\n\t/**\n\t * Fired when {@link module:engine/view/documentfragment~DocumentFragment} is converted.\n\t *\n\t * @event documentFragment\n\t * @see #event:element\n\t */\n}\n\nmix( UpcastDispatcher, EmitterMixin );\n\n// Traverses given model item and searches elements which marks marker range. Found element is removed from\n// DocumentFragment but path of this element is stored in a Map which is then returned.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment|module:engine/view/node~Node} modelItem Fragment of model.\n// @returns {Map<String, module:engine/model/range~Range>} List of static markers.\nfunction extractMarkersFromModelFragment( modelItem, writer ) {\n\tconst markerElements = new Set();\n\tconst markers = new Map();\n\n\t// Create ModelTreeWalker.\n\tconst range = ModelRange._createIn( modelItem ).getItems();\n\n\t// Walk through DocumentFragment and collect marker elements.\n\tfor ( const item of range ) {\n\t\t// Check if current element is a marker.\n\t\tif ( item.name == '$marker' ) {\n\t\t\tmarkerElements.add( item );\n\t\t}\n\t}\n\n\t// Walk through collected marker elements store its path and remove its from the DocumentFragment.\n\tfor ( const markerElement of markerElements ) {\n\t\tconst markerName = markerElement.getAttribute( 'data-name' );\n\t\tconst currentPosition = writer.createPositionBefore( markerElement );\n\n\t\t// When marker of given name is not stored it means that we have found the beginning of the range.\n\t\tif ( !markers.has( markerName ) ) {\n\t\t\tmarkers.set( markerName, new ModelRange( currentPosition.clone() ) );\n\t\t// Otherwise is means that we have found end of the marker range.\n\t\t} else {\n\t\t\tmarkers.get( markerName ).end = currentPosition.clone();\n\t\t}\n\n\t\t// Remove marker element from DocumentFragment.\n\t\twriter.remove( markerElement );\n\t}\n\n\treturn markers;\n}\n\n// Creates model fragment according to given context and returns position in the bottom (the deepest) element.\nfunction createContextTree( contextDefinition, writer ) {\n\tlet position;\n\n\tfor ( const item of new SchemaContext( contextDefinition ) ) {\n\t\tconst attributes = {};\n\n\t\tfor ( const key of item.getAttributeKeys() ) {\n\t\t\tattributes[ key ] = item.getAttribute( key );\n\t\t}\n\n\t\tconst current = writer.createElement( item.name, attributes );\n\n\t\tif ( position ) {\n\t\t\twriter.append( current, position );\n\t\t}\n\n\t\tposition = ModelPosition._createAt( current, 0 );\n\t}\n\n\treturn position;\n}\n\n/**\n * Conversion interface that is registered for given {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n * and is passed as one of parameters when {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher dispatcher}\n * fires it's events.\n *\n * @interface module:engine/conversion/upcastdispatcher~UpcastConversionApi\n */\n\n/**\n * Starts conversion of given item by firing an appropriate event.\n *\n * Every fired event is passed (as first parameter) an object with `modelRange` property. Every event may set and/or\n * modify that property. When all callbacks are done, the final value of `modelRange` property is returned by this method.\n * The `modelRange` must be {@link module:engine/model/range~Range model range} or `null` (as set by default).\n *\n * @method #convertItem\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:text\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:documentFragment\n * @param {module:engine/view/item~Item} viewItem Item to convert.\n * @param {module:engine/model/position~Position} modelCursor Position of conversion.\n * @returns {Object} result Conversion result.\n * @returns {module:engine/model/range~Range|null} result.modelRange Model range containing result of item conversion,\n * created and modified by callbacks attached to fired event, or `null` if the conversion result was incorrect.\n * @returns {module:engine/model/position~Position} result.modelCursor Position where conversion should be continued.\n */\n\n/**\n * Starts conversion of all children of given item by firing appropriate events for all those children.\n *\n * @method #convertChildren\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:text\n * @fires module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:documentFragment\n * @param {module:engine/view/item~Item} viewItem Element which children should be converted.\n * @param {module:engine/model/position~Position} modelCursor Position of conversion.\n * @returns {Object} result Conversion result.\n * @returns {module:engine/model/range~Range} result.modelRange Model range containing results of conversion of all children of given item.\n * When no children was converted then range is collapsed.\n * @returns {module:engine/model/position~Position} result.modelCursor Position where conversion should be continued.\n */\n\n/**\n * Checks {@link module:engine/model/schema~Schema schema} to find allowed parent for element that we are going to insert\n * starting from given position. If current parent does not allow to insert element but one of the ancestors does then\n * split nodes to allowed parent.\n *\n * If schema allows to insert node in given position, nothing is split and object with that position is returned.\n *\n * If it was not possible to find allowed parent, `null` is returned, nothing is split.\n *\n * Otherwise, ancestors are split and object with position and the copy of the split element is returned.\n *\n * For instance, if `<image>` is not allowed in `<paragraph>` but is allowed in `$root`:\n *\n *\t\t<paragraph>foo[]bar</paragraph>\n *\n * \t-> split for `<image>` ->\n *\n * \t<paragraph>foo</paragraph>[]<paragraph>bar</paragraph>\n *\n * In the sample above position between `<paragraph>` elements will be returned as `position` and the second `paragraph`\n * as `cursorParent`.\n *\n * @method #splitToAllowedParent\n * @param {module:engine/model/position~Position} position Position on which element is going to be inserted.\n * @param {module:engine/model/node~Node} node Node to insert.\n * @returns {Object|null} Split result. If it was not possible to find allowed position `null` is returned.\n * @returns {module:engine/model/position~Position} position between split elements.\n * @returns {module:engine/model/element~Element} [cursorParent] Element inside which cursor should be placed to\n * continue conversion. When element is not defined it means that there was no split.\n */\n\n/**\n * Returns all the split parts of given `element` that were created during upcasting through using {@link #splitToAllowedParent}.\n * It enables you to easily track those elements and continue processing them after they are split during their children conversion.\n *\n *\t\t<paragraph>Foo<image />bar<image />baz</paragraph> ->\n *\t\t<paragraph>Foo</paragraph><image /><paragraph>bar</paragraph><image /><paragraph>baz</paragraph>\n *\n * For a reference to any of above paragraphs, the function will return all three paragraphs (the original element included),\n * sorted in the order of their creation (the original element is the first one).\n *\n * If given `element` was not split, an array with single element is returned.\n *\n * Example of a usage in a converter code:\n *\n *\t\tconst myElement = conversionApi.writer.createElement( 'myElement' );\n *\n *\t\t// Children conversion may split `myElement`.\n *\t\tconversionApi.convertChildren( myElement, modelCursor );\n *\n *\t\tconst splitParts = conversionApi.getSplitParts( myElement );\n *\t\tconst lastSplitPart = splitParts[ splitParts.length - 1 ];\n *\n *\t\t// Setting `data.modelRange` basing on split parts:\n *\t\tdata.modelRange = conversionApi.writer.createRange(\n *\t\t\tconversionApi.writer.createPositionBefore( myElement ),\n *\t\t\tconversionApi.writer.createPositionAfter( lastSplitPart )\n *\t\t);\n *\n *\t\t// Setting `data.modelCursor` to continue after the last split element:\n *\t\tdata.modelCursor = conversionApi.writer.createPositionAfter( lastSplitPart );\n *\n * **Tip:** if you are unable to get a reference to the original element (for example because the code is split into multiple converters\n * or even classes) but it was already converted, you might want to check first element in `data.modelRange`. This is a common situation\n * if an attribute converter is separated from an element converter.\n *\n * @method #getSplitParts\n * @param {module:engine/model/element~Element} element\n * @returns {Array.<module:engine/model/element~Element>}\n */\n\n/**\n * Stores information about what parts of processed view item are still waiting to be handled. After a piece of view item\n * was converted, appropriate consumable value should be {@link module:engine/conversion/viewconsumable~ViewConsumable#consume consumed}.\n *\n * @member {module:engine/conversion/viewconsumable~ViewConsumable} #consumable\n */\n\n/**\n * Custom data stored by converters for conversion process. Custom properties of this object can be defined and use to\n * pass parameters between converters.\n *\n * The difference between this property and `data` parameter of\n * {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element} is that `data` parameters allows you\n * to pass parameters within a single event and `store` within the whole conversion.\n *\n * @member {Object} #store\n */\n\n/**\n * The model's schema instance.\n *\n * @member {module:engine/model/schema~Schema} #schema\n */\n\n/**\n * The {@link module:engine/model/writer~Writer} instance used to manipulate data during conversion.\n *\n * @member {module:engine/model/writer~Writer} #writer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/controller/datacontroller\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nimport Mapper from '../conversion/mapper';\n\nimport DowncastDispatcher from '../conversion/downcastdispatcher';\nimport { insertText } from '../conversion/downcasthelpers';\n\nimport UpcastDispatcher from '../conversion/upcastdispatcher';\nimport { convertText, convertToModelFragment } from '../conversion/upcasthelpers';\n\nimport ViewDocumentFragment from '../view/documentfragment';\nimport ViewDocument from '../view/document';\nimport ViewDowncastWriter from '../view/downcastwriter';\n\nimport ModelRange from '../model/range';\n\n/**\n * Controller for the data pipeline. The data pipeline controls how data is retrieved from the document\n * and set inside it. Hence, the controller features two methods which allow to {@link ~DataController#get get}\n * and {@link ~DataController#set set} data of the {@link ~DataController#model model}\n * using given:\n *\n * * {@link module:engine/dataprocessor/dataprocessor~DataProcessor data processor},\n * * downcast converters,\n * * upcast converters.\n *\n * An instance of the data controller is always available in the {@link module:core/editor/editor~Editor#data `editor.data`}\n * property:\n *\n *\t\teditor.data.get( { rootName: 'customRoot' } ); // -> '<p>Hello!</p>'\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class DataController {\n\t/**\n\t * Creates a data controller instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Data model.\n\t * @param {module:engine/dataprocessor/dataprocessor~DataProcessor} [dataProcessor] Data processor that should be used\n\t * by the controller.\n\t */\n\tconstructor( model, dataProcessor ) {\n\t\t/**\n\t\t * Data model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Data processor used during the conversion.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/dataprocessor/dataprocessor~DataProcessor}\n\t\t */\n\t\tthis.processor = dataProcessor;\n\n\t\t/**\n\t\t * Mapper used for the conversion. It has no permanent bindings, because they are created when getting data and\n\t\t * cleared directly after the data are converted. However, the mapper is defined as a class property, because\n\t\t * it needs to be passed to the `DowncastDispatcher` as a conversion API.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/mapper~Mapper}\n\t\t */\n\t\tthis.mapper = new Mapper();\n\n\t\t/**\n\t\t * Downcast dispatcher used by the {@link #get get method}. Downcast converters should be attached to it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/downcastdispatcher~DowncastDispatcher}\n\t\t */\n\t\tthis.downcastDispatcher = new DowncastDispatcher( {\n\t\t\tmapper: this.mapper\n\t\t} );\n\t\tthis.downcastDispatcher.on( 'insert:$text', insertText(), { priority: 'lowest' } );\n\n\t\t/**\n\t\t * Upcast dispatcher used by the {@link #set set method}. Upcast converters should be attached to it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/upcastdispatcher~UpcastDispatcher}\n\t\t */\n\t\tthis.upcastDispatcher = new UpcastDispatcher( {\n\t\t\tschema: model.schema\n\t\t} );\n\n\t\t// Define default converters for text and elements.\n\t\t//\n\t\t// Note that if there is no default converter for the element it will be skipped, for instance `<b>foo</b>` will be\n\t\t// converted to nothing. We add `convertToModelFragment` as a last converter so it converts children of that\n\t\t// element to the document fragment so `<b>foo</b>` will be converted to `foo` if there is no converter for `<b>`.\n\t\tthis.upcastDispatcher.on( 'text', convertText(), { priority: 'lowest' } );\n\t\tthis.upcastDispatcher.on( 'element', convertToModelFragment(), { priority: 'lowest' } );\n\t\tthis.upcastDispatcher.on( 'documentFragment', convertToModelFragment(), { priority: 'lowest' } );\n\n\t\tthis.decorate( 'init' );\n\n\t\t// Fire `ready` event when initialisation has completed. Such low level listener gives possibility\n\t\t// to plug into initialisation pipeline without interrupting the initialisation flow.\n\t\tthis.on( 'init', () => {\n\t\t\tthis.fire( 'ready' );\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Returns the model's data converted by downcast dispatchers attached to {@link #downcastDispatcher} and\n\t * formatted by the {@link #processor data processor}.\n\t *\n\t * @param {Object} [options]\n\t * @param {String} [options.rootName='main'] Root name.\n\t * @param {String} [options.trim='empty'] Whether returned data should be trimmed. This option is set to `empty` by default,\n\t * which means whenever editor content is considered empty, an empty string will be returned. To turn off trimming completely\n\t * use `'none'`. In such cases exact content will be returned (for example `<p> </p>` for an empty editor).\n\t * @returns {String} Output data.\n\t */\n\tget( options ) {\n\t\tconst { rootName = 'main', trim = 'empty' } = options || {};\n\n\t\tif ( !this._checkIfRootsExists( [ rootName ] ) ) {\n\t\t\t/**\n\t\t\t * Cannot get data from a non-existing root. This error is thrown when {@link #get DataController#get() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #get} like:\n\t\t\t *\n\t\t\t *\t\tdata.get( { rootName: 'root2' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-get-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-get-non-existent-root: Attempting to get data from a non-existing root.', this );\n\t\t}\n\n\t\tconst root = this.model.document.getRoot( rootName );\n\n\t\tif ( trim === 'empty' && !this.model.hasContent( root, { ignoreWhitespaces: true } ) ) {\n\t\t\treturn '';\n\t\t}\n\n\t\treturn this.stringify( root );\n\t}\n\n\t/**\n\t * Returns the content of the given {@link module:engine/model/element~Element model's element} or\n\t * {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the downcast converters\n\t * attached to {@link #downcastDispatcher} and formatted by the {@link #processor data processor}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment\n\t * Element whose content will be stringified.\n\t * @returns {String} Output data.\n\t */\n\tstringify( modelElementOrFragment ) {\n\t\t// Model -> view.\n\t\tconst viewDocumentFragment = this.toView( modelElementOrFragment );\n\n\t\t// View -> data.\n\t\treturn this.processor.toData( viewDocumentFragment );\n\t}\n\n\t/**\n\t * Returns the content of the given {@link module:engine/model/element~Element model element} or\n\t * {@link module:engine/model/documentfragment~DocumentFragment model document fragment} converted by the downcast\n\t * converters attached to {@link #downcastDispatcher} to a\n\t * {@link module:engine/view/documentfragment~DocumentFragment view document fragment}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} modelElementOrFragment\n\t * Element or document fragment whose content will be converted.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} Output view DocumentFragment.\n\t */\n\ttoView( modelElementOrFragment ) {\n\t\t// Clear bindings so the call to this method gives correct results.\n\t\tthis.mapper.clearBindings();\n\n\t\t// First, convert elements.\n\t\tconst modelRange = ModelRange._createIn( modelElementOrFragment );\n\n\t\tconst viewDocumentFragment = new ViewDocumentFragment();\n\n\t\t// Create separate ViewDowncastWriter just for data conversion purposes.\n\t\t// We have no view controller and rendering do DOM in DataController so view.change() block is not used here.\n\t\tconst viewWriter = new ViewDowncastWriter( new ViewDocument() );\n\t\tthis.mapper.bindElements( modelElementOrFragment, viewDocumentFragment );\n\n\t\tthis.downcastDispatcher.convertInsert( modelRange, viewWriter );\n\n\t\tif ( !modelElementOrFragment.is( 'documentFragment' ) ) {\n\t\t\t// Then, if a document element is converted, convert markers.\n\t\t\t// From all document markers, get those, which \"intersect\" with the converter element.\n\t\t\tconst markers = _getMarkersRelativeToElement( modelElementOrFragment );\n\n\t\t\tfor ( const [ name, range ] of markers ) {\n\t\t\t\tthis.downcastDispatcher.convertMarkerAdd( name, range, viewWriter );\n\t\t\t}\n\t\t}\n\n\t\treturn viewDocumentFragment;\n\t}\n\n\t/**\n\t * Sets initial input data parsed by the {@link #processor data processor} and\n\t * converted by the {@link #upcastDispatcher view-to-model converters}.\n\t * Initial data can be set only to document that {@link module:engine/model/document~Document#version} is equal 0.\n\t *\n\t * **Note** This method is {@link module:utils/observablemixin~ObservableMixin#decorate decorated} which is\n\t * used by e.g. collaborative editing plugin that syncs remote data on init.\n\t *\n\t * When data is passed as a string it is initialized on a default `main` root:\n\t *\n\t *\t\tdataController.init( '<p>Foo</p>' ); // Initializes data on the `main` root.\n\t *\n\t * To initialize data on a different root or multiple roots at once, object containing `rootName` - `data` pairs should be passed:\n\t *\n\t *\t\tdataController.init( { main: '<p>Foo</p>', title: '<h1>Bar</h1>' } ); // Initializes data on the `main` and `title` roots.\n\t *\n\t * @fires init\n\t * @param {String|Object.<String,String>} data Input data as a string or an object containing `rootName` - `data`\n\t * pairs to initialize data on multiple roots at once.\n\t * @returns {Promise} Promise that is resolved after the data is set on the editor.\n\t */\n\tinit( data ) {\n\t\tif ( this.model.document.version ) {\n\t\t\t/**\n\t\t\t * Cannot set initial data to not empty {@link module:engine/model/document~Document}.\n\t\t\t * Initial data should be set once, during {@link module:core/editor/editor~Editor} initialization,\n\t\t\t * when the {@link module:engine/model/document~Document#version} is equal 0.\n\t\t\t *\n\t\t\t * @error datacontroller-init-document-not-empty\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-init-document-not-empty: Trying to set initial data to not empty document.', this );\n\t\t}\n\n\t\tlet initialData = {};\n\t\tif ( typeof data === 'string' ) {\n\t\t\tinitialData.main = data; // Default root is 'main'. To initiate data on a different root, object should be passed.\n\t\t} else {\n\t\t\tinitialData = data;\n\t\t}\n\n\t\tif ( !this._checkIfRootsExists( Object.keys( initialData ) ) ) {\n\t\t\t/**\n\t\t\t * Cannot init data on a non-existing root. This error is thrown when {@link #init DataController#init() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #init} like:\n\t\t\t *\n\t\t\t * \t\tdata.init( { main: '<p>Foo</p>', root2: '<p>Bar</p>' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-init-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.', this );\n\t\t}\n\n\t\tthis.model.enqueueChange( 'transparent', writer => {\n\t\t\tfor ( const rootName of Object.keys( initialData ) ) {\n\t\t\t\tconst modelRoot = this.model.document.getRoot( rootName );\n\t\t\t\twriter.insert( this.parse( initialData[ rootName ], modelRoot ), modelRoot, 0 );\n\t\t\t}\n\t\t} );\n\n\t\treturn Promise.resolve();\n\t}\n\n\t/**\n\t * Sets input data parsed by the {@link #processor data processor} and\n\t * converted by the {@link #upcastDispatcher view-to-model converters}.\n\t * This method can be used any time to replace existing editor data by the new one without clearing the\n\t * {@link module:engine/model/document~Document#history document history}.\n\t *\n\t * This method also creates a batch with all the changes applied. If all you need is to parse data, use\n\t * the {@link #parse} method.\n\t *\n\t * When data is passed as a string it is set on a default `main` root:\n\t *\n\t *\t\tdataController.set( '<p>Foo</p>' ); // Sets data on the `main` root.\n\t *\n\t * To set data on a different root or multiple roots at once, object containing `rootName` - `data` pairs should be passed:\n\t *\n\t *\t\tdataController.set( { main: '<p>Foo</p>', title: '<h1>Bar</h1>' } ); // Sets data on the `main` and `title` roots.\n\t *\n\t * @param {String|Object.<String,String>} data Input data as a string or an object containing `rootName` - `data`\n\t * pairs to set data on multiple roots at once.\n\t */\n\tset( data ) {\n\t\tlet newData = {};\n\n\t\tif ( typeof data === 'string' ) {\n\t\t\tnewData.main = data; // Default root is 'main'. To set data on a different root, object should be passed.\n\t\t} else {\n\t\t\tnewData = data;\n\t\t}\n\n\t\tif ( !this._checkIfRootsExists( Object.keys( newData ) ) ) {\n\t\t\t/**\n\t\t\t * Cannot set data on a non-existing root. This error is thrown when {@link #set DataController#set() method}\n\t\t\t * is called with non-existent root name. For example, if there is an editor instance with only `main` root,\n\t\t\t * calling {@link #set} like:\n\t\t\t *\n\t\t\t * \t\tdata.set( { main: '<p>Foo</p>', root2: '<p>Bar</p>' } );\n\t\t\t *\n\t\t\t * will throw this error.\n\t\t\t *\n\t\t\t * @error datacontroller-set-non-existent-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'datacontroller-set-non-existent-root: Attempting to set data on a non-existing root.', this );\n\t\t}\n\n\t\tthis.model.enqueueChange( 'transparent', writer => {\n\t\t\twriter.setSelection( null );\n\t\t\twriter.removeSelectionAttribute( this.model.document.selection.getAttributeKeys() );\n\n\t\t\tfor ( const rootName of Object.keys( newData ) ) {\n\t\t\t\t// Save to model.\n\t\t\t\tconst modelRoot = this.model.document.getRoot( rootName );\n\n\t\t\t\twriter.remove( writer.createRangeIn( modelRoot ) );\n\t\t\t\twriter.insert( this.parse( newData[ rootName ], modelRoot ), modelRoot, 0 );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns the data parsed by the {@link #processor data processor} and then converted by upcast converters\n\t * attached to the {@link #upcastDispatcher}.\n\t *\n\t * @see #set\n\t * @param {String} data Data to parse.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context='$root'] Base context in which the view will\n\t * be converted to the model. See: {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#convert}.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Parsed data.\n\t */\n\tparse( data, context = '$root' ) {\n\t\t// data -> view\n\t\tconst viewDocumentFragment = this.processor.toView( data );\n\n\t\t// view -> model\n\t\treturn this.toModel( viewDocumentFragment, context );\n\t}\n\n\t/**\n\t * Returns the result of the given {@link module:engine/view/element~Element view element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment view document fragment} converted by the\n\t * {@link #upcastDispatcher view-to-model converters}, wrapped by {@link module:engine/model/documentfragment~DocumentFragment}.\n\t *\n\t * When marker elements were converted during the conversion process, it will be set as a document fragment's\n\t * {@link module:engine/model/documentfragment~DocumentFragment#markers static markers map}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElementOrFragment\n\t * Element or document fragment whose content will be converted.\n\t * @param {module:engine/model/schema~SchemaContextDefinition} [context='$root'] Base context in which the view will\n\t * be converted to the model. See: {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#convert}.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Output document fragment.\n\t */\n\ttoModel( viewElementOrFragment, context = '$root' ) {\n\t\treturn this.model.change( writer => {\n\t\t\treturn this.upcastDispatcher.convert( viewElementOrFragment, writer, context );\n\t\t} );\n\t}\n\n\t/**\n\t * Removes all event listeners set by the DataController.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks if all provided root names are existing editor roots.\n\t *\n\t * @private\n\t * @param {Array.<String>} rootNames Root names to check.\n\t * @returns {Boolean} Whether all provided root names are existing editor roots.\n\t */\n\t_checkIfRootsExists( rootNames ) {\n\t\tfor ( const rootName of rootNames ) {\n\t\t\tif ( !this.model.document.getRootNames().includes( rootName ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Event fired once data initialisation has finished.\n\t *\n\t * @event ready\n\t */\n\n\t/**\n\t * Event fired after {@link #init init() method} has been run. It can be {@link #listenTo listened to} to adjust/modify\n\t * the initialisation flow. However, if the `init` event is stopped or prevented, the {@link #event:ready ready event}\n\t * should be fired manually.\n\t *\n\t * The `init` event is fired by decorated {@link #init} method.\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * @event init\n\t */\n}\n\nmix( DataController, ObservableMixin );\n\n// Helper function for downcast conversion.\n//\n// Takes a document element (element that is added to a model document) and checks which markers are inside it\n// and which markers are containing it. If the marker is intersecting with element, the intersection is returned.\nfunction _getMarkersRelativeToElement( element ) {\n\tconst result = [];\n\tconst doc = element.root.document;\n\n\tif ( !doc ) {\n\t\treturn [];\n\t}\n\n\tconst elementRange = ModelRange._createIn( element );\n\n\tfor ( const marker of doc.model.markers ) {\n\t\tconst intersection = elementRange.getIntersection( marker.getRange() );\n\n\t\tif ( intersection ) {\n\t\t\tresult.push( [ marker.name, intersection ] );\n\t\t}\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/batch\n */\n\n/**\n * A batch instance groups model changes ({@link module:engine/model/operation/operation~Operation operations}). All operations\n * grouped in a single batch can be reverted together, so you can also think about a batch as of a single undo step. If you want\n * to extend a given undo step, you can add more changes to the batch using {@link module:engine/model/model~Model#enqueueChange}:\n *\n *\t\tmodel.enqueueChange( batch, writer => {\n *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n *\t\t} );\n *\n * @see module:engine/model/model~Model#enqueueChange\n * @see module:engine/model/model~Model#change\n */\nexport default class Batch {\n\t/**\n\t * Creates a batch instance.\n\t *\n\t * @see module:engine/model/model~Model#enqueueChange\n\t * @see module:engine/model/model~Model#change\n\t * @param {'transparent'|'default'} [type='default'] The type of the batch.\n\t */\n\tconstructor( type = 'default' ) {\n\t\t/**\n\t\t * An array of operations that compose this batch.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Array.<module:engine/model/operation/operation~Operation>}\n\t\t */\n\t\tthis.operations = [];\n\n\t\t/**\n\t\t * The type of the batch.\n\t\t *\n\t\t * It can be one of the following values:\n\t\t * * `'default'` – All \"normal\" batches. This is the most commonly used type.\n\t\t * * `'transparent'` – A batch that should be ignored by other features, i.e. an initial batch or collaborative editing\n\t\t * changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {'transparent'|'default'}\n\t\t */\n\t\tthis.type = type;\n\t}\n\n\t/**\n\t * Returns the base version of this batch, which is equal to the base version of the first operation in the batch.\n\t * If there are no operations in the batch or neither operation has the base version set, it returns `null`.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget baseVersion() {\n\t\tfor ( const op of this.operations ) {\n\t\t\tif ( op.baseVersion !== null ) {\n\t\t\t\treturn op.baseVersion;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Adds an operation to the batch instance.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation An operation to add.\n\t * @returns {module:engine/model/operation/operation~Operation} The added operation.\n\t */\n\taddOperation( operation ) {\n\t\toperation.batch = this;\n\t\tthis.operations.push( operation );\n\n\t\treturn operation;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/operation\n */\n\n/**\n * Abstract base operation class.\n *\n * @abstract\n */\nexport default class Operation {\n\t/**\n\t * Base operation constructor.\n\t *\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( baseVersion ) {\n\t\t/**\n\t\t * {@link module:engine/model/document~Document#version} on which operation can be applied. If you try to\n\t\t * {@link module:engine/model/model~Model#applyOperation apply} operation with different base version than the\n\t\t * {@link module:engine/model/document~Document#version document version} the\n\t\t * {@link module:utils/ckeditorerror~CKEditorError model-document-applyOperation-wrong-version} error is thrown.\n\t\t *\n\t\t * @member {Number}\n\t\t */\n\t\tthis.baseVersion = baseVersion;\n\n\t\t/**\n\t\t * Defines whether operation is executed on attached or detached {@link module:engine/model/item~Item items}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isDocumentOperation\n\t\t */\n\t\tthis.isDocumentOperation = this.baseVersion !== null;\n\n\t\t/**\n\t\t * {@link module:engine/model/batch~Batch Batch} to which the operation is added or `null` if the operation is not\n\t\t * added to any batch yet.\n\t\t *\n\t\t * @member {module:engine/model/batch~Batch|null} #batch\n\t\t */\n\t\tthis.batch = null;\n\n\t\t/**\n\t\t * Operation type.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #type\n\t\t */\n\n\t\t/**\n\t\t * Creates and returns an operation that has the same parameters as this operation.\n\t\t *\n\t\t * @method #clone\n\t\t * @returns {module:engine/model/operation/operation~Operation} Clone of this operation.\n\t\t */\n\n\t\t/**\n\t\t * Creates and returns a reverse operation. Reverse operation when executed right after\n\t\t * the original operation will bring back tree model state to the point before the original\n\t\t * operation execution. In other words, it reverses changes done by the original operation.\n\t\t *\n\t\t * Keep in mind that tree model state may change since executing the original operation,\n\t\t * so reverse operation will be \"outdated\". In that case you will need to transform it by\n\t\t * all operations that were executed after the original operation.\n\t\t *\n\t\t * @method #getReversed\n\t\t * @returns {module:engine/model/operation/operation~Operation} Reversed operation.\n\t\t */\n\n\t\t/**\n\t\t * Executes the operation - modifications described by the operation properties will be applied to the model tree.\n\t\t *\n\t\t * @protected\n\t\t * @method #_execute\n\t\t */\n\t}\n\n\t/**\n\t * Checks whether the operation's parameters are correct and the operation can be correctly executed. Throws\n\t * an error if operation is not valid.\n\t *\n\t * @protected\n\t * @method #_validate\n\t */\n\t_validate() {\n\t}\n\n\t/**\n\t * Custom toJSON method to solve child-parent circular dependencies.\n\t *\n\t * @method #toJSON\n\t * @returns {Object} Clone of this object with the operation property replaced with string.\n\t */\n\ttoJSON() {\n\t\t// This method creates only a shallow copy, all nested objects should be defined separately.\n\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/1477.\n\t\tconst json = Object.assign( {}, this );\n\n\t\tjson.__className = this.constructor.className;\n\n\t\t// Remove reference to the parent `Batch` to avoid circular dependencies.\n\t\tdelete json.batch;\n\n\t\t// Only document operations are shared with other clients so it is not necessary to keep this information.\n\t\tdelete json.isDocumentOperation;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Name of the operation class used for serialization.\n\t *\n\t * @type {String}\n\t */\n\tstatic get className() {\n\t\treturn 'Operation';\n\t}\n\n\t/**\n\t * Creates Operation object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} doc Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/operation~Operation}\n\t */\n\tstatic fromJSON( json ) {\n\t\treturn new this( json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.toString() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/model/documentfragment\n */\n\nimport NodeList from './nodelist';\nimport Element from './element';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n// @if CK_DEBUG_ENGINE // const { stringifyMap } = require( '../dev-utils/utils' );\n\n/**\n * DocumentFragment represents a part of model which does not have a common root but it's top-level nodes\n * can be seen as siblings. In other words, it is a detached part of model tree, without a root.\n *\n * DocumentFragment has own {@link module:engine/model/markercollection~MarkerCollection}. Markers from this collection\n * will be set to the {@link module:engine/model/model~Model#markers model markers} by a\n * {@link module:engine/model/writer~Writer#insert} function.\n */\nexport default class DocumentFragment {\n\t/**\n\t * Creates an empty `DocumentFragment`.\n\t *\n\t * **Note:** Constructor of this class shouldn't be used directly in the code.\n\t * Use the {@link module:engine/model/writer~Writer#createDocumentFragment} method instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/node~Node|Iterable.<module:engine/model/node~Node>} [children]\n\t * Nodes to be contained inside the `DocumentFragment`.\n\t */\n\tconstructor( children ) {\n\t\t/**\n\t\t * DocumentFragment static markers map. This is a list of names and {@link module:engine/model/range~Range ranges}\n\t\t * which will be set as Markers to {@link module:engine/model/model~Model#markers model markers collection}\n\t\t * when DocumentFragment will be inserted to the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Map<String,module:engine/model/range~Range>} module:engine/model/documentfragment~DocumentFragment#markers\n\t\t */\n\t\tthis.markers = new Map();\n\n\t\t/**\n\t\t * List of nodes contained inside the document fragment.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/documentfragment~DocumentFragment#_children\n\t\t */\n\t\tthis._children = new NodeList();\n\n\t\tif ( children ) {\n\t\t\tthis._insertChild( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all nodes contained inside this document fragment.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this.getChildren();\n\t}\n\n\t/**\n\t * Number of this document fragment's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Sum of {@link module:engine/model/node~Node#offsetSize offset sizes} of all of this document fragment's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._children.maxOffset;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this document fragment, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Artificial root of `DocumentFragment`. Returns itself. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Artificial parent of `DocumentFragment`. Returns `null`. Added for compatibility reasons.\n\t *\n\t * @readonly\n\t * @type {null}\n\t */\n\tget parent() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given type.\n\t *\n\t *\t\tdocFrag.is( 'documentFragment' ); // -> true\n\t *\t\tdocFrag.is( 'model:documentFragment' ); // -> true\n\t *\n\t *\t\tdocFrag.is( 'view:documentFragment' ); // -> false\n\t *\t\tdocFrag.is( 'element' ); // -> false\n\t *\t\tdocFrag.is( 'node' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'documentFragment' || type == 'model:documentFragment';\n\t}\n\n\t/**\n\t * Gets the child at the given index. Returns `null` if incorrect index was passed.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/model/node~Node|null} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children.getNode( index );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all of this document fragment's children.\n\t *\n\t * @returns {Iterable.<module:engine/model/node~Node>}\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an index of the given child node. Returns `null` if given node is not a child of this document fragment.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's index.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.getNodeIndex( node );\n\t}\n\n\t/**\n\t * Returns the starting offset of given child. Starting offset is equal to the sum of\n\t * {@link module:engine/model/node~Node#offsetSize offset sizes} of all node's siblings that are before it. Returns `null` if\n\t * given node is not a child of this document fragment.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number|null} Child node's starting offset.\n\t */\n\tgetChildStartOffset( node ) {\n\t\treturn this._children.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Returns path to a `DocumentFragment`, which is an empty array. Added for compatibility reasons.\n\t *\n\t * @returns {Array}\n\t */\n\tgetPath() {\n\t\treturn [];\n\t}\n\n\t/**\n\t * Returns a descendant node by its path relative to this element.\n\t *\n\t *\t\t// <this>a<b>c</b></this>\n\t *\t\tthis.getNodeByPath( [ 0 ] ); // -> \"a\"\n\t *\t\tthis.getNodeByPath( [ 1 ] ); // -> <b>\n\t *\t\tthis.getNodeByPath( [ 1, 0 ] ); // -> \"c\"\n\t *\n\t * @param {Array.<Number>} relativePath Path of the node to find, relative to this element.\n\t * @returns {module:engine/model/node~Node|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tgetNodeByPath( relativePath ) {\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\tfor ( const index of relativePath ) {\n\t\t\tnode = node.getChild( node.offsetToIndex( index ) );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Converts offset \"position\" to index \"position\".\n\t *\n\t * Returns index of a node that occupies given offset. If given offset is too low, returns `0`. If given offset is\n\t * too high, returns index after last child}.\n\t *\n\t *\t\tconst textNode = new Text( 'foo' );\n\t *\t\tconst pElement = new Element( 'p' );\n\t *\t\tconst docFrag = new DocumentFragment( [ textNode, pElement ] );\n\t *\t\tdocFrag.offsetToIndex( -1 ); // Returns 0, because offset is too low.\n\t *\t\tdocFrag.offsetToIndex( 0 ); // Returns 0, because offset 0 is taken by `textNode` which is at index 0.\n\t *\t\tdocFrag.offsetToIndex( 1 ); // Returns 0, because `textNode` has `offsetSize` equal to 3, so it occupies offset 1 too.\n\t *\t\tdocFrag.offsetToIndex( 2 ); // Returns 0.\n\t *\t\tdocFrag.offsetToIndex( 3 ); // Returns 1.\n\t *\t\tdocFrag.offsetToIndex( 4 ); // Returns 2. There are no nodes at offset 4, so last available index is returned.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number} Index of a node that occupies given offset.\n\t */\n\toffsetToIndex( offset ) {\n\t\treturn this._children.offsetToIndex( offset );\n\t}\n\n\t/**\n\t * Converts `DocumentFragment` instance to plain object and returns it.\n\t * Takes care of converting all of this document fragment's children.\n\t *\n\t * @returns {Object} `DocumentFragment` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = [];\n\n\t\tfor ( const node of this._children ) {\n\t\t\tjson.push( node.toJSON() );\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a `DocumentFragment` instance from given plain object (i.e. parsed JSON string).\n\t * Converts `DocumentFragment` children to proper nodes.\n\t *\n\t * @param {Object} json Plain object to be converted to `DocumentFragment`.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} `DocumentFragment` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\tconst children = [];\n\n\t\tfor ( const child of json ) {\n\t\t\tif ( child.name ) {\n\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t} else {\n\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t}\n\t\t}\n\n\t\treturn new DocumentFragment( children );\n\t}\n\n\t/**\n\t * {@link #_insertChild Inserts} one or more nodes at the end of this document fragment.\n\t *\n\t * @protected\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_appendChild( items ) {\n\t\tthis._insertChild( this.childCount, items );\n\t}\n\n\t/**\n\t * Inserts one or more nodes at the given index and sets {@link module:engine/model/node~Node#parent parent} of these nodes\n\t * to this document fragment.\n\t *\n\t * @protected\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>} items Items to be inserted.\n\t */\n\t_insertChild( index, items ) {\n\t\tconst nodes = normalize( items );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode._remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\t\t}\n\n\t\tthis._children._insertNodes( index, nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index\n\t * and sets {@link module:engine/model/node~Node#parent parent} of these nodes to `null`.\n\t *\n\t * @protected\n\t * @param {Number} index Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.<module:engine/model/node~Node>} Array containing removed nodes.\n\t */\n\t_removeChildren( index, howMany = 1 ) {\n\t\tconst nodes = this._children._removeNodes( index, howMany );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tnode.parent = null;\n\t\t}\n\n\t\treturn nodes;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn 'documentFragment';\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelDocumentFragment: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // printTree() {\n\t// @if CK_DEBUG_ENGINE //\tlet string = 'ModelDocumentFragment: [';\n\n\t// @if CK_DEBUG_ENGINE //\tfor ( const child of this.getChildren() ) {\n\t// @if CK_DEBUG_ENGINE //\t\tstring += '\\n';\n\n\t// @if CK_DEBUG_ENGINE //\t\tif ( child.is( 'text' ) ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\tconst textAttrs = stringifyMap( child._attrs );\n\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += '\\t'.repeat( 1 );\n\n\t// @if CK_DEBUG_ENGINE //\t\t\tif ( textAttrs !== '' ) {\n\t// @if CK_DEBUG_ENGINE //\t\t\t\tstring += `<$text${ textAttrs }>` + child.data + '</$text>';\n\t// @if CK_DEBUG_ENGINE //\t\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\t\tstring += child.data;\n\t// @if CK_DEBUG_ENGINE //\t\t\t}\n\t// @if CK_DEBUG_ENGINE //\t\t} else {\n\t// @if CK_DEBUG_ENGINE //\t\t\tstring += child.printTree( 1 );\n\t// @if CK_DEBUG_ENGINE //\t\t}\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\tstring += '\\n]';\n\n\t// @if CK_DEBUG_ENGINE //\treturn string;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // logTree() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( this.printTree() );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/model/item~Item|Iterable.<module:engine/model/item~Item>}\n// @returns {Iterable.<module:engine/model/node~Node>}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\tif ( typeof node == 'string' ) {\n\t\t\t\treturn new Text( node );\n\t\t\t}\n\n\t\t\tif ( node instanceof TextProxy ) {\n\t\t\t\treturn new Text( node.data, node.getAttributes() );\n\t\t\t}\n\n\t\t\treturn node;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/utils\n */\n\nimport Node from '../node';\nimport Text from '../text';\nimport TextProxy from '../textproxy';\nimport Range from '../range';\nimport DocumentFragment from '../documentfragment';\nimport NodeList from '../nodelist';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Contains functions used for composing model tree by {@link module:engine/model/operation/operation~Operation operations}.\n * Those functions are built on top of {@link module:engine/model/node~Node node}, and it's child classes', APIs.\n *\n * @protected\n * @namespace utils\n */\n\n/**\n * Inserts given nodes at given position.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.insert\n * @param {module:engine/model/position~Position} position Position at which nodes should be inserted.\n * @param {module:engine/model/node~NodeSet} nodes Nodes to insert.\n * @returns {module:engine/model/range~Range} Range spanning over inserted elements.\n */\nexport function _insert( position, nodes ) {\n\tnodes = _normalizeNodes( nodes );\n\n\t// We have to count offset before inserting nodes because they can get merged and we would get wrong offsets.\n\tconst offset = nodes.reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\tconst parent = position.parent;\n\n\t// Insertion might be in a text node, we should split it if that's the case.\n\t_splitNodeAtPosition( position );\n\tconst index = position.index;\n\n\t// Insert nodes at given index. After splitting we have a proper index and insertion is between nodes,\n\t// using basic `Element` API.\n\tparent._insertChild( index, nodes );\n\n\t// Merge text nodes, if possible. Merging is needed only at points where inserted nodes \"touch\" \"old\" nodes.\n\t_mergeNodesAtIndex( parent, index + nodes.length );\n\t_mergeNodesAtIndex( parent, index );\n\n\treturn new Range( position, position.getShiftedBy( offset ) );\n}\n\n/**\n * Removed nodes in given range. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils._remove\n * @param {module:engine/model/range~Range} range Range containing nodes to remove.\n * @returns {Array.<module:engine/model/node~Node>}\n */\nexport function _remove( range ) {\n\tif ( !range.isFlat ) {\n\t\t/**\n\t\t * Trying to remove a range which starts and ends in different element.\n\t\t *\n\t\t * @error operation-utils-remove-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'operation-utils-remove-range-not-flat: ' +\n\t\t\t'Trying to remove a range which starts and ends in different element.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tconst parent = range.start.parent;\n\n\t// Range may be inside text nodes, we have to split them if that's the case.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Remove the text nodes using basic `Element` API.\n\tconst removed = parent._removeChildren( range.start.index, range.end.index - range.start.index );\n\n\t// Merge text nodes, if possible. After some nodes were removed, node before and after removed range will be\n\t// touching at the position equal to the removed range beginning. We check merging possibility there.\n\t_mergeNodesAtIndex( parent, range.start.index );\n\n\treturn removed;\n}\n\n/**\n * Moves nodes in given range to given target position. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.move\n * @param {module:engine/model/range~Range} sourceRange Range containing nodes to move.\n * @param {module:engine/model/position~Position} targetPosition Position to which nodes should be moved.\n * @returns {module:engine/model/range~Range} Range containing moved nodes.\n */\nexport function _move( sourceRange, targetPosition ) {\n\tif ( !sourceRange.isFlat ) {\n\t\t/**\n\t\t * Trying to move a range which starts and ends in different element.\n\t\t *\n\t\t * @error operation-utils-move-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'operation-utils-move-range-not-flat: ' +\n\t\t\t'Trying to move a range which starts and ends in different element.',\n\t\t\tthis\n\t\t);\n\t}\n\n\tconst nodes = _remove( sourceRange );\n\n\t// We have to fix `targetPosition` because model changed after nodes from `sourceRange` got removed and\n\t// that change might have an impact on `targetPosition`.\n\ttargetPosition = targetPosition._getTransformedByDeletion( sourceRange.start, sourceRange.end.offset - sourceRange.start.offset );\n\n\treturn _insert( targetPosition, nodes );\n}\n\n/**\n * Sets given attribute on nodes in given range. The attributes are only set on top-level nodes of the range, not on its children.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils._setAttribute\n * @param {module:engine/model/range~Range} range Range containing nodes that should have the attribute set. Must be a flat range.\n * @param {String} key Key of attribute to set.\n * @param {*} value Attribute value.\n */\nexport function _setAttribute( range, key, value ) {\n\t// Range might start or end in text nodes, so we have to split them.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Iterate over all items in the range.\n\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t// Iterator will return `TextProxy` instances but we know that those text proxies will\n\t\t// always represent full text nodes (this is guaranteed thanks to splitting we did before).\n\t\t// So, we can operate on those text proxies' text nodes.\n\t\tconst node = item.is( 'textProxy' ) ? item.textNode : item;\n\n\t\tif ( value !== null ) {\n\t\t\tnode._setAttribute( key, value );\n\t\t} else {\n\t\t\tnode._removeAttribute( key );\n\t\t}\n\n\t\t// After attributes changing it may happen that some text nodes can be merged. Try to merge with previous node.\n\t\t_mergeNodesAtIndex( node.parent, node.index );\n\t}\n\n\t// Try to merge last changed node with it's previous sibling (not covered by the loop above).\n\t_mergeNodesAtIndex( range.end.parent, range.end.index );\n}\n\n/**\n * Normalizes given object or an array of objects to an array of {@link module:engine/model/node~Node nodes}. See\n * {@link module:engine/model/node~NodeSet NodeSet} for details on how normalization is performed.\n *\n * @protected\n * @function module:engine/model/operation/utils~utils.normalizeNodes\n * @param {module:engine/model/node~NodeSet} nodes Objects to normalize.\n * @returns {Array.<module:engine/model/node~Node>} Normalized nodes.\n */\nexport function _normalizeNodes( nodes ) {\n\tconst normalized = [];\n\n\tif ( !( nodes instanceof Array ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Convert instances of classes other than Node.\n\tfor ( let i = 0; i < nodes.length; i++ ) {\n\t\tif ( typeof nodes[ i ] == 'string' ) {\n\t\t\tnormalized.push( new Text( nodes[ i ] ) );\n\t\t} else if ( nodes[ i ] instanceof TextProxy ) {\n\t\t\tnormalized.push( new Text( nodes[ i ].data, nodes[ i ].getAttributes() ) );\n\t\t} else if ( nodes[ i ] instanceof DocumentFragment || nodes[ i ] instanceof NodeList ) {\n\t\t\tfor ( const child of nodes[ i ] ) {\n\t\t\t\tnormalized.push( child );\n\t\t\t}\n\t\t} else if ( nodes[ i ] instanceof Node ) {\n\t\t\tnormalized.push( nodes[ i ] );\n\t\t}\n\t\t// Skip unrecognized type.\n\t}\n\n\t// Merge text nodes.\n\tfor ( let i = 1; i < normalized.length; i++ ) {\n\t\tconst node = normalized[ i ];\n\t\tconst prev = normalized[ i - 1 ];\n\n\t\tif ( node instanceof Text && prev instanceof Text && _haveSameAttributes( node, prev ) ) {\n\t\t\t// Doing this instead changing `prev.data` because `data` is readonly.\n\t\t\tnormalized.splice( i - 1, 2, new Text( prev.data + node.data, prev.getAttributes() ) );\n\t\t\ti--;\n\t\t}\n\t}\n\n\treturn normalized;\n}\n\n// Checks if nodes before and after given index in given element are {@link module:engine/model/text~Text text nodes} and\n// merges them into one node if they have same attributes.\n//\n// Merging is done by removing two text nodes and inserting a new text node containing data from both merged text nodes.\n//\n// @private\n// @param {module:engine/model/element~Element} element Parent element of nodes to merge.\n// @param {Number} index Index between nodes to merge.\nfunction _mergeNodesAtIndex( element, index ) {\n\tconst nodeBefore = element.getChild( index - 1 );\n\tconst nodeAfter = element.getChild( index );\n\n\t// Check if both of those nodes are text objects with same attributes.\n\tif ( nodeBefore && nodeAfter && nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) && _haveSameAttributes( nodeBefore, nodeAfter ) ) {\n\t\t// Append text of text node after index to the before one.\n\t\tconst mergedNode = new Text( nodeBefore.data + nodeAfter.data, nodeBefore.getAttributes() );\n\n\t\t// Remove separate text nodes.\n\t\telement._removeChildren( index - 1, 2 );\n\n\t\t// Insert merged text node.\n\t\telement._insertChild( index - 1, mergedNode );\n\t}\n}\n\n// Checks if given position is in a text node, and if so, splits the text node in two text nodes, each of them\n// containing a part of original text node.\n//\n// @private\n// @param {module:engine/model/position~Position} position Position at which node should be split.\nfunction _splitNodeAtPosition( position ) {\n\tconst textNode = position.textNode;\n\tconst element = position.parent;\n\n\tif ( textNode ) {\n\t\tconst offsetDiff = position.offset - textNode.startOffset;\n\t\tconst index = textNode.index;\n\n\t\telement._removeChildren( index, 1 );\n\n\t\tconst firstPart = new Text( textNode.data.substr( 0, offsetDiff ), textNode.getAttributes() );\n\t\tconst secondPart = new Text( textNode.data.substr( offsetDiff ), textNode.getAttributes() );\n\n\t\telement._insertChild( index, [ firstPart, secondPart ] );\n\t}\n}\n\n// Checks whether two given nodes have same attributes.\n//\n// @private\n// @param {module:engine/model/node~Node} nodeA Node to check.\n// @param {module:engine/model/node~Node} nodeB Node to check.\n// @returns {Boolean} `true` if nodes have same attributes, `false` otherwise.\nfunction _haveSameAttributes( nodeA, nodeB ) {\n\tconst iteratorA = nodeA.getAttributes();\n\tconst iteratorB = nodeB.getAttributes();\n\n\tfor ( const attr of iteratorA ) {\n\t\tif ( attr[ 1 ] !== nodeB.getAttribute( attr[ 0 ] ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\titeratorB.next();\n\t}\n\n\treturn iteratorB.next().done;\n}\n\n/**\n * Value that can be normalized to an array of {@link module:engine/model/node~Node nodes}.\n *\n * Non-arrays are normalized as follows:\n * * {@link module:engine/model/node~Node Node} is left as is,\n * * {@link module:engine/model/textproxy~TextProxy TextProxy} and `String` are normalized to {@link module:engine/model/text~Text Text},\n * * {@link module:engine/model/nodelist~NodeList NodeList} is normalized to an array containing all nodes that are in that node list,\n * * {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment} is normalized to an array containing all of it's\n * * children.\n *\n * Arrays are processed item by item like non-array values and flattened to one array. Normalization always results in\n * a flat array of {@link module:engine/model/node~Node nodes}. Consecutive text nodes (or items normalized to text nodes) will be\n * merged if they have same attributes.\n *\n * @typedef {module:engine/model/node~Node|module:engine/model/textproxy~TextProxy|String|\n * module:engine/model/nodelist~NodeList|module:engine/model/documentfragment~DocumentFragment|Iterable}\n * module:engine/model/node~NodeSet\n */\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\nfunction isEqual(value, other) {\n return baseIsEqual(value, other);\n}\n\nexport default isEqual;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/attributeoperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport { _setAttribute } from './utils';\nimport { isEqual } from 'lodash-es';\n\n/**\n * Operation to change nodes' attribute.\n *\n * Using this class you can add, remove or change value of the attribute.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class AttributeOperation extends Operation {\n\t/**\n\t * Creates an operation that changes, removes or adds attributes.\n\t *\n\t * If only `newValue` is set, attribute will be added on a node. Note that all nodes in operation's range must not\n\t * have an attribute with the same key as the added attribute.\n\t *\n\t * If only `oldValue` is set, then attribute with given key will be removed. Note that all nodes in operation's range\n\t * must have an attribute with that key added.\n\t *\n\t * If both `newValue` and `oldValue` are set, then the operation will change the attribute value. Note that all nodes in\n\t * operation's ranges must already have an attribute with given key and `oldValue` as value\n\t *\n\t * @param {module:engine/model/range~Range} range Range on which the operation should be applied. Must be a flat range.\n\t * @param {String} key Key of an attribute to change or remove.\n\t * @param {*} oldValue Old value of the attribute with given key or `null`, if attribute was not set before.\n\t * @param {*} newValue New value of the attribute with given key or `null`, if operation should remove attribute.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( range, key, oldValue, newValue, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Range on which operation should be applied.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.range = range.clone();\n\n\t\t/**\n\t\t * Key of an attribute to change or remove.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.key = key;\n\n\t\t/**\n\t\t * Old value of the attribute with given key or `null`, if attribute was not set before.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.oldValue = oldValue === undefined ? null : oldValue;\n\n\t\t/**\n\t\t * New value of the attribute with given key or `null`, if operation should remove attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.newValue = newValue === undefined ? null : newValue;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.oldValue === null ) {\n\t\t\treturn 'addAttribute';\n\t\t} else if ( this.newValue === null ) {\n\t\t\treturn 'removeAttribute';\n\t\t} else {\n\t\t\treturn 'changeAttribute';\n\t\t}\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new AttributeOperation( this.range, this.key, this.oldValue, this.newValue, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tgetReversed() {\n\t\treturn new AttributeOperation( this.range, this.key, this.newValue, this.oldValue, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.range = this.range.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( !this.range.isFlat ) {\n\t\t\t/**\n\t\t\t * The range to change is not flat.\n\t\t\t *\n\t\t\t * @error attribute-operation-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'attribute-operation-range-not-flat: The range to change is not flat.', this );\n\t\t}\n\n\t\tfor ( const item of this.range.getItems( { shallow: true } ) ) {\n\t\t\tif ( this.oldValue !== null && !isEqual( item.getAttribute( this.key ), this.oldValue ) ) {\n\t\t\t\t/**\n\t\t\t\t * Changed node has different attribute value than operation's old attribute value.\n\t\t\t\t *\n\t\t\t\t * @error attribute-operation-wrong-old-value\n\t\t\t\t * @param {module:engine/model/item~Item} item\n\t\t\t\t * @param {String} key\n\t\t\t\t * @param {*} value\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'attribute-operation-wrong-old-value: Changed node has different attribute value than operation\\'s ' +\n\t\t\t\t\t'old attribute value.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ item, key: this.key, value: this.oldValue }\n\t\t\t\t);\n\t\t\t}\n\n\t\t\tif ( this.oldValue === null && this.newValue !== null && item.hasAttribute( this.key ) ) {\n\t\t\t\t/**\n\t\t\t\t * The attribute with given key already exists for the given node.\n\t\t\t\t *\n\t\t\t\t * @error attribute-operation-attribute-exists\n\t\t\t\t * @param {module:engine/model/node~Node} node\n\t\t\t\t * @param {String} key\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'attribute-operation-attribute-exists: The attribute with given key already exists.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ node: item, key: this.key }\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t// If value to set is same as old value, don't do anything.\n\t\tif ( !isEqual( this.oldValue, this.newValue ) ) {\n\t\t\t// Execution.\n\t\t\t_setAttribute( this.range, this.key, this.newValue );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'AttributeOperation';\n\t}\n\n\t/**\n\t * Creates `AttributeOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new AttributeOperation( Range.fromJSON( json.range, document ), json.key, json.oldValue, json.newValue, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `AttributeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.key }\": ${ JSON.stringify( this.oldValue ) }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` -> ${ JSON.stringify( this.newValue ) }, ${ this.range }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/detachoperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\nimport { _remove } from './utils';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const ModelRange = require( '../range' ).default;\n\n/**\n * Operation to permanently remove node from detached root.\n * Note this operation is only a local operation and won't be send to the other clients.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class DetachOperation extends Operation {\n\t/**\n\t * Creates an insert operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition\n\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t * @param {Number} howMany Offset size of moved range. Moved range will start from `sourcePosition` and end at\n\t * `sourcePosition` with offset shifted by `howMany`.\n\t */\n\tconstructor( sourcePosition, howMany ) {\n\t\tsuper( null );\n\n\t\t/**\n\t\t * Position before the first {@link module:engine/model/item~Item model item} to detach.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} #sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\n\t\t/**\n\t\t * Offset size of moved range.\n\t\t *\n\t\t * @member {Number} #howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'detach';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = this.sourcePosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( this.sourcePosition.root.document ) {\n\t\t\t/**\n\t\t\t * Cannot detach document node.\n\t\t\t *\n\t\t\t * @error detach-operation-on-document-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'detach-operation-on-document-node: Cannot detach document node.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t_remove( Range._createFromPositionAndShift( this.sourcePosition, this.howMany ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'DetachOperation';\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // const range = ModelRange._createFromPositionAndShift( this.sourcePosition, this.howMany );\n\t// @if CK_DEBUG_ENGINE //\tconst nodes = Array.from( range.getItems() );\n\t// @if CK_DEBUG_ENGINE //\tconst nodeString = nodes.length > 1 ? `[ ${ nodes.length } ]` : nodes[ 0 ];\n\n\t// @if CK_DEBUG_ENGINE //\treturn `DetachOperation( ${ this.baseVersion } ): ${ nodeString } -> ${ range }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/moveoperation\n */\n\nimport Operation from './operation';\nimport Position from '../position';\nimport Range from '../range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport { _move } from './utils';\n\n// @if CK_DEBUG_ENGINE // const ModelRange = require( '../range' ).default;\n\n/**\n * Operation to move a range of {@link module:engine/model/item~Item model items}\n * to given {@link module:engine/model/position~Position target position}.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MoveOperation extends Operation {\n\t/**\n\t * Creates a move operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition\n\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t * @param {Number} howMany Offset size of moved range. Moved range will start from `sourcePosition` and end at\n\t * `sourcePosition` with offset shifted by `howMany`.\n\t * @param {module:engine/model/position~Position} targetPosition Position at which moved nodes will be inserted.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( sourcePosition, howMany, targetPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\t\t// `'toNext'` because `sourcePosition` is a bit like a start of the moved range.\n\t\tthis.sourcePosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Offset size of moved range.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/moveoperation~MoveOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position at which moved nodes will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#targetPosition\n\t\t */\n\t\tthis.targetPosition = targetPosition.clone();\n\t\tthis.targetPosition.stickiness = 'toNone';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.targetPosition.root.rootName == '$graveyard' ) {\n\t\t\treturn 'remove';\n\t\t} else if ( this.sourcePosition.root.rootName == '$graveyard' ) {\n\t\t\treturn 'reinsert';\n\t\t}\n\n\t\treturn 'move';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.sourcePosition, this.howMany, this.targetPosition, this.baseVersion );\n\t}\n\n\t/**\n\t * Returns the start position of the moved range after it got moved. This may be different than\n\t * {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition} in some cases, i.e. when a range is moved\n\t * inside the same parent but {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition targetPosition}\n\t * is after {@link module:engine/model/operation/moveoperation~MoveOperation#sourcePosition sourcePosition}.\n\t *\n\t *\t\t vv vv\n\t *\t\tabcdefg ===> adefbcg\n\t *\t\t ^ ^\n\t *\t\t targetPos\tmovedRangeStart\n\t *\t\t offset 6\toffset 4\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetMovedRangeStart() {\n\t\treturn this.targetPosition._getTransformedByDeletion( this.sourcePosition, this.howMany );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tgetReversed() {\n\t\tconst newTargetPosition = this.sourcePosition._getTransformedByInsertion( this.targetPosition, this.howMany );\n\n\t\treturn new this.constructor( this.getMovedRangeStart(), this.howMany, newTargetPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst sourceElement = this.sourcePosition.parent;\n\t\tconst targetElement = this.targetPosition.parent;\n\t\tconst sourceOffset = this.sourcePosition.offset;\n\t\tconst targetOffset = this.targetPosition.offset;\n\n\t\t// Validate whether move operation has correct parameters.\n\t\t// Validation is pretty complex but move operation is one of the core ways to manipulate the document state.\n\t\t// We expect that many errors might be connected with one of scenarios described below.\n\t\tif ( sourceOffset + this.howMany > sourceElement.maxOffset ) {\n\t\t\t/**\n\t\t\t * The nodes which should be moved do not exist.\n\t\t\t *\n\t\t\t * @error move-operation-nodes-do-not-exist\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.', this\n\t\t\t);\n\t\t} else if ( sourceElement === targetElement && sourceOffset < targetOffset && targetOffset < sourceOffset + this.howMany ) {\n\t\t\t/**\n\t\t\t * Trying to move a range of nodes into the middle of that range.\n\t\t\t *\n\t\t\t * @error move-operation-range-into-itself\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-range-into-itself: Trying to move a range of nodes to the inside of that range.', this\n\t\t\t);\n\t\t} else if ( this.sourcePosition.root == this.targetPosition.root ) {\n\t\t\tif ( compareArrays( this.sourcePosition.getParentPath(), this.targetPosition.getParentPath() ) == 'prefix' ) {\n\t\t\t\tconst i = this.sourcePosition.path.length - 1;\n\n\t\t\t\tif ( this.targetPosition.path[ i ] >= sourceOffset && this.targetPosition.path[ i ] < sourceOffset + this.howMany ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Trying to move a range of nodes into one of nodes from that range.\n\t\t\t\t\t *\n\t\t\t\t\t * @error move-operation-node-into-itself\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'move-operation-node-into-itself: Trying to move a range of nodes into one of nodes from that range.', this\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t_move( Range._createFromPositionAndShift( this.sourcePosition, this.howMany ), this.targetPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = this.sourcePosition.toJSON();\n\t\tjson.targetPosition = this.targetPosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MoveOperation';\n\t}\n\n\t/**\n\t * Creates `MoveOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst sourcePosition = Position.fromJSON( json.sourcePosition, document );\n\t\tconst targetPosition = Position.fromJSON( json.targetPosition, document );\n\n\t\treturn new this( sourcePosition, json.howMany, targetPosition, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \tconst range = ModelRange._createFromPositionAndShift( this.sourcePosition, this.howMany );\n\n\t// @if CK_DEBUG_ENGINE //\treturn `MoveOperation( ${ this.baseVersion } ): ${ range } -> ${ this.targetPosition }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/insertoperation\n */\n\nimport Operation from './operation';\nimport Position from '../position';\nimport NodeList from '../nodelist';\nimport MoveOperation from './moveoperation';\nimport { _insert, _normalizeNodes } from './utils';\nimport Text from '../text';\nimport Element from '../element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to insert one or more nodes at given position in the model.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class InsertOperation extends Operation {\n\t/**\n\t * Creates an insert operation.\n\t *\n\t * @param {module:engine/model/position~Position} position Position of insertion.\n\t * @param {module:engine/model/node~NodeSet} nodes The list of nodes to be inserted.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( position, nodes, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position of insertion.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/insertoperation~InsertOperation#position\n\t\t */\n\t\tthis.position = position.clone();\n\t\tthis.position.stickiness = 'toNone';\n\n\t\t/**\n\t\t * List of nodes to insert.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/operation/insertoperation~InsertOperation#nodeList\n\t\t */\n\t\tthis.nodes = new NodeList( _normalizeNodes( nodes ) );\n\n\t\t/**\n\t\t * Flag deciding how the operation should be transformed. If set to `true`, nodes might get additional attributes\n\t\t * during operational transformation. This happens when the operation insertion position is inside of a range\n\t\t * where attributes have changed.\n\t\t *\n\t\t * @member {Boolean} module:engine/model/operation/insertoperation~InsertOperation#shouldReceiveAttributes\n\t\t */\n\t\tthis.shouldReceiveAttributes = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'insert';\n\t}\n\n\t/**\n\t * Total offset size of inserted nodes.\n\t *\n\t * @returns {Number}\n\t */\n\tget howMany() {\n\t\treturn this.nodes.maxOffset;\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/insertoperation~InsertOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\tconst nodes = new NodeList( [ ...this.nodes ].map( node => node._clone( true ) ) );\n\t\tconst insert = new InsertOperation( this.position, nodes, this.baseVersion );\n\n\t\tinsert.shouldReceiveAttributes = this.shouldReceiveAttributes;\n\n\t\treturn insert;\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tgetReversed() {\n\t\tconst graveyard = this.position.root.document.graveyard;\n\t\tconst gyPosition = new Position( graveyard, [ 0 ] );\n\n\t\treturn new MoveOperation( this.position, this.nodes.maxOffset, gyPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst targetElement = this.position.parent;\n\n\t\tif ( !targetElement || targetElement.maxOffset < this.position.offset ) {\n\t\t\t/**\n\t\t\t * Insertion position is invalid.\n\t\t\t *\n\t\t\t * @error insert-operation-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'insert-operation-position-invalid: Insertion position is invalid.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\t// What happens here is that we want original nodes be passed to writer because we want original nodes\n\t\t// to be inserted to the model. But in InsertOperation, we want to keep those nodes as they were added\n\t\t// to the operation, not modified. For example, text nodes can get merged or cropped while Elements can\n\t\t// get children. It is important that InsertOperation has the copy of original nodes in intact state.\n\t\tconst originalNodes = this.nodes;\n\t\tthis.nodes = new NodeList( [ ...originalNodes ].map( node => node._clone( true ) ) );\n\n\t\t_insert( this.position, originalNodes );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.position = this.position.toJSON();\n\t\tjson.nodes = this.nodes.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'InsertOperation';\n\t}\n\n\t/**\n\t * Creates `InsertOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/insertoperation~InsertOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst children = [];\n\n\t\tfor ( const child of json.nodes ) {\n\t\t\tif ( child.name ) {\n\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t} else {\n\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t}\n\t\t}\n\n\t\tconst insert = new InsertOperation( Position.fromJSON( json.position, document ), children, json.baseVersion );\n\t\tinsert.shouldReceiveAttributes = json.shouldReceiveAttributes;\n\n\t\treturn insert;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \tconst nodeString = this.nodes.length > 1 ? `[ ${ this.nodes.length } ]` : this.nodes.getNode( 0 );\n\n\t// @if CK_DEBUG_ENGINE //\treturn `InsertOperation( ${ this.baseVersion } ): ${ nodeString } -> ${ this.position }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/markeroperation\n */\n\nimport Operation from './operation';\nimport Range from '../range';\n\n/**\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MarkerOperation extends Operation {\n\t/**\n\t * @param {String} name Marker name.\n\t * @param {module:engine/model/range~Range} oldRange Marker range before the change.\n\t * @param {module:engine/model/range~Range} newRange Marker range after the change.\n\t * @param {module:engine/model/markercollection~MarkerCollection} markers Marker collection on which change should be executed.\n\t * @param {Boolean} affectsData Specifies whether the marker operation affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( name, oldRange, newRange, markers, affectsData, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Marker name.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Marker range before the change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.oldRange = oldRange ? oldRange.clone() : null;\n\n\t\t/**\n\t\t * Marker range after the change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/range~Range}\n\t\t */\n\t\tthis.newRange = newRange ? newRange.clone() : null;\n\n\t\t/**\n\t\t * Specifies whether the marker operation affects the data produced by the data pipeline\n\t\t * (is persisted in the editor's data).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.affectsData = affectsData;\n\n\t\t/**\n\t\t * Marker collection on which change should be executed.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis._markers = markers;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'marker';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new MarkerOperation( this.name, this.oldRange, this.newRange, this._markers, this.affectsData, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation}\n\t */\n\tgetReversed() {\n\t\treturn new MarkerOperation( this.name, this.newRange, this.oldRange, this._markers, this.affectsData, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst type = this.newRange ? '_set' : '_remove';\n\n\t\tthis._markers[ type ]( this.name, this.newRange, true, this.affectsData );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tif ( this.oldRange ) {\n\t\t\tjson.oldRange = this.oldRange.toJSON();\n\t\t}\n\n\t\tif ( this.newRange ) {\n\t\t\tjson.newRange = this.newRange.toJSON();\n\t\t}\n\n\t\tdelete json._markers;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MarkerOperation';\n\t}\n\n\t/**\n\t * Creates `MarkerOperation` object from deserialized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/markeroperation~MarkerOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new MarkerOperation(\n\t\t\tjson.name,\n\t\t\tjson.oldRange ? Range.fromJSON( json.oldRange, document ) : null,\n\t\t\tjson.newRange ? Range.fromJSON( json.newRange, document ) : null,\n\t\t\tdocument.model.markers,\n\t\t\tjson.affectsData,\n\t\t\tjson.baseVersion\n\t\t);\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `MarkerOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.name }\": ${ this.oldRange } -> ${ this.newRange }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/renameoperation\n */\n\nimport Operation from './operation';\nimport Element from '../element';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Position from '../position';\n\n/**\n * Operation to change element's name.\n *\n * Using this class you can change element's name.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class RenameOperation extends Operation {\n\t/**\n\t * Creates an operation that changes element's name.\n\t *\n\t * @param {module:engine/model/position~Position} position Position before an element to change.\n\t * @param {String} oldName Current name of the element.\n\t * @param {String} newName New name for the element.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( position, oldName, newName, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position before an element to change.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/renameoperation~RenameOperation#position\n\t\t */\n\t\tthis.position = position;\n\t\t// This position sticks to the next node because it is a position before the node that we want to change.\n\t\tthis.position.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Current name of the element.\n\t\t *\n\t\t * @member {String} module:engine/model/operation/renameoperation~RenameOperation#oldName\n\t\t */\n\t\tthis.oldName = oldName;\n\n\t\t/**\n\t\t * New name for the element.\n\t\t *\n\t\t * @member {String} module:engine/model/operation/renameoperation~RenameOperation#newName\n\t\t */\n\t\tthis.newName = newName;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'rename';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/renameoperation~RenameOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new RenameOperation( this.position.clone(), this.oldName, this.newName, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/renameoperation~RenameOperation}\n\t */\n\tgetReversed() {\n\t\treturn new RenameOperation( this.position.clone(), this.newName, this.oldName, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst element = this.position.nodeAfter;\n\n\t\tif ( !( element instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Given position is invalid or node after it is not instance of Element.\n\t\t\t *\n\t\t\t * @error rename-operation-wrong-position\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rename-operation-wrong-position: Given position is invalid or node after it is not an instance of Element.',\n\t\t\t\tthis\n\t\t\t);\n\t\t} else if ( element.name !== this.oldName ) {\n\t\t\t/**\n\t\t\t * Element to change has different name than operation's old name.\n\t\t\t *\n\t\t\t * @error rename-operation-wrong-name\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rename-operation-wrong-name: Element to change has different name than operation\\'s old name.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst element = this.position.nodeAfter;\n\n\t\telement.name = this.newName;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.position = this.position.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'RenameOperation';\n\t}\n\n\t/**\n\t * Creates `RenameOperation` object from deserialized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/attributeoperation~AttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\treturn new RenameOperation( Position.fromJSON( json.position, document ), json.oldName, json.newName, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `RenameOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.position }: \"${ this.oldName }\" -> \"${ this.newName }\"`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/rootattributeoperation\n */\n\nimport Operation from './operation';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to change root element's attribute. Using this class you can add, remove or change value of the attribute.\n *\n * This operation is needed, because root elements can't be changed through\n * @link module:engine/model/operation/attributeoperation~AttributeOperation}.\n * It is because {@link module:engine/model/operation/attributeoperation~AttributeOperation}\n * requires a range to change and root element can't\n * be a part of range because every {@link module:engine/model/position~Position} has to be inside a root.\n * {@link module:engine/model/position~Position} can't be created before a root element.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class RootAttributeOperation extends Operation {\n\t/**\n\t * Creates an operation that changes, removes or adds attributes on root element.\n\t *\n\t * @see module:engine/model/operation/attributeoperation~AttributeOperation\n\t * @param {module:engine/model/rootelement~RootElement} root Root element to change.\n\t * @param {String} key Key of an attribute to change or remove.\n\t * @param {*} oldValue Old value of the attribute with given key or `null` if adding a new attribute.\n\t * @param {*} newValue New value to set for the attribute. If `null`, then the operation just removes the attribute.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( root, key, oldValue, newValue, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Root element to change.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/rootelement~RootElement}\n\t\t */\n\t\tthis.root = root;\n\n\t\t/**\n\t\t * Key of an attribute to change or remove.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.key = key;\n\n\t\t/**\n\t\t * Old value of the attribute with given key or `null` if adding a new attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.oldValue = oldValue;\n\n\t\t/**\n\t\t * New value to set for the attribute. If `null`, then the operation just removes the attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @member {*}\n\t\t */\n\t\tthis.newValue = newValue;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\tif ( this.oldValue === null ) {\n\t\t\treturn 'addRootAttribute';\n\t\t} else if ( this.newValue === null ) {\n\t\t\treturn 'removeRootAttribute';\n\t\t} else {\n\t\t\treturn 'changeRootAttribute';\n\t\t}\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new RootAttributeOperation( this.root, this.key, this.oldValue, this.newValue, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation}\n\t */\n\tgetReversed() {\n\t\treturn new RootAttributeOperation( this.root, this.key, this.newValue, this.oldValue, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tif ( this.root != this.root.root || this.root.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * The element to change is not a root element.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-not-a-root\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t * @param {*} value\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-not-a-root: The element to change is not a root element.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\n\t\tif ( this.oldValue !== null && this.root.getAttribute( this.key ) !== this.oldValue ) {\n\t\t\t/**\n\t\t\t * The attribute which should be removed does not exists for the given node.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-wrong-old-value\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t * @param {*} value\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-wrong-old-value: Changed node has different attribute value than operation\\'s ' +\n\t\t\t\t'old attribute value.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\n\t\tif ( this.oldValue === null && this.newValue !== null && this.root.hasAttribute( this.key ) ) {\n\t\t\t/**\n\t\t\t * The attribute with given key already exists for the given node.\n\t\t\t *\n\t\t\t * @error rootattribute-operation-attribute-exists\n\t\t\t * @param {module:engine/model/rootelement~RootElement} root\n\t\t\t * @param {String} key\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-attribute-exists: The attribute with given key already exists.',\n\t\t\t\tthis,\n\t\t\t\t{ root: this.root, key: this.key }\n\t\t\t);\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tif ( this.newValue !== null ) {\n\t\t\tthis.root._setAttribute( this.key, this.newValue );\n\t\t} else {\n\t\t\tthis.root._removeAttribute( this.key );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.root = this.root.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'RootAttributeOperation';\n\t}\n\n\t/**\n\t * Creates RootAttributeOperation object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/rootattributeoperation~RootAttributeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tif ( !document.getRoot( json.root ) ) {\n\t\t\t/**\n\t\t\t * Cannot create RootAttributeOperation for document. Root with specified name does not exist.\n\t\t\t *\n\t\t\t * @error rootattributeoperation-fromjson-no-root\n\t\t\t * @param {String} rootName\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'rootattribute-operation-fromjson-no-root: Cannot create RootAttributeOperation. Root with specified name does not exist.',\n\t\t\t\tthis,\n\t\t\t\t{ rootName: json.root }\n\t\t\t);\n\t\t}\n\n\t\treturn new RootAttributeOperation( document.getRoot( json.root ), json.key, json.oldValue, json.newValue, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `RootAttributeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`\"${ this.key }\": ${ JSON.stringify( this.oldValue ) }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` -> ${ JSON.stringify( this.newValue ) }, ${ this.root.rootName }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/mergeoperation\n */\n\nimport Operation from './operation';\nimport SplitOperation from './splitoperation';\nimport Position from '../position';\nimport Range from '../range';\nimport { _move } from './utils';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to merge two {@link module:engine/model/element~Element elements}.\n *\n * The merged element is the parent of {@link ~MergeOperation#sourcePosition} and it is merged into the parent of\n * {@link ~MergeOperation#targetPosition}. All nodes from the merged element are moved to {@link ~MergeOperation#targetPosition}.\n *\n * The merged element is moved to the graveyard at {@link ~MergeOperation#graveyardPosition}.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MergeOperation extends Operation {\n\t/**\n\t * Creates a merge operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition Position inside the merged element. All nodes from that\n\t * element after that position will be moved to {@link ~#targetPosition}.\n\t * @param {Number} howMany Summary offset size of nodes which will be moved from the merged element to the new parent.\n\t * @param {module:engine/model/position~Position} targetPosition Position which the nodes from the merged elements will be moved to.\n\t * @param {module:engine/model/position~Position} graveyardPosition Position in graveyard to which the merged element will be moved.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( sourcePosition, howMany, targetPosition, graveyardPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position inside the merged element. All nodes from that element after that position will be moved to {@link ~#targetPosition}.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#sourcePosition\n\t\t */\n\t\tthis.sourcePosition = sourcePosition.clone();\n\t\t// This is, and should always remain, the first position in its parent.\n\t\tthis.sourcePosition.stickiness = 'toPrevious';\n\n\t\t/**\n\t\t * Summary offset size of nodes which will be moved from the merged element to the new parent.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/mergeoperation~MergeOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position which the nodes from the merged elements will be moved to.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#targetPosition\n\t\t */\n\t\tthis.targetPosition = targetPosition.clone();\n\t\t// Except of a rare scenario in `MergeOperation` x `MergeOperation` transformation,\n\t\t// this is, and should always remain, the last position in its parent.\n\t\tthis.targetPosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Position in graveyard to which the merged element will be moved.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/mergeoperation~MergeOperation#graveyardPosition\n\t\t */\n\t\tthis.graveyardPosition = graveyardPosition.clone();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'merge';\n\t}\n\n\t/**\n\t * Position before the merged element (which will be deleted).\n\t *\n\t * @readonly\n\t * @type {module:engine/model/position~Position}\n\t */\n\tget deletionPosition() {\n\t\treturn new Position( this.sourcePosition.root, this.sourcePosition.path.slice( 0, -1 ) );\n\t}\n\n\t/**\n\t * Artificial range that contains all the nodes from the merged element that will be moved to {@link ~MergeOperation#sourcePosition}.\n\t * The range starts at {@link ~MergeOperation#sourcePosition} and ends in the same parent, at `POSITIVE_INFINITY` offset.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/range~Range}\n\t */\n\tget movedRange() {\n\t\tconst end = this.sourcePosition.getShiftedBy( Number.POSITIVE_INFINITY );\n\n\t\treturn new Range( this.sourcePosition, end );\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new this.constructor( this.sourcePosition, this.howMany, this.targetPosition, this.graveyardPosition, this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation}\n\t */\n\tgetReversed() {\n\t\t// Positions in this method are transformed by this merge operation because the split operation bases on\n\t\t// the context after this merge operation happened (because split operation reverses it).\n\t\t// So we need to acknowledge that the merge operation happened and those positions changed a little.\n\t\tconst targetPosition = this.targetPosition._getTransformedByMergeOperation( this );\n\n\t\tconst path = this.sourcePosition.path.slice( 0, -1 );\n\t\tconst insertionPosition = new Position( this.sourcePosition.root, path )._getTransformedByMergeOperation( this );\n\n\t\tconst split = new SplitOperation( targetPosition, this.howMany, this.graveyardPosition, this.baseVersion + 1 );\n\t\tsplit.insertionPosition = insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst sourceElement = this.sourcePosition.parent;\n\t\tconst targetElement = this.targetPosition.parent;\n\n\t\t// Validate whether merge operation has correct parameters.\n\t\tif ( !sourceElement.parent ) {\n\t\t\t/**\n\t\t\t * Merge source position is invalid. The element to be merged must have a parent node.\n\t\t\t *\n\t\t\t * @error merge-operation-source-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-source-position-invalid: Merge source position is invalid.', this );\n\t\t} else if ( !targetElement.parent ) {\n\t\t\t/**\n\t\t\t * Merge target position is invalid. The element to be merged must have a parent node.\n\t\t\t *\n\t\t\t * @error merge-operation-target-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-target-position-invalid: Merge target position is invalid.', this );\n\t\t} else if ( this.howMany != sourceElement.maxOffset ) {\n\t\t\t/**\n\t\t\t * Merge operation specifies wrong number of nodes to move.\n\t\t\t *\n\t\t\t * @error merge-operation-how-many-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'merge-operation-how-many-invalid: Merge operation specifies wrong number of nodes to move.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst mergedElement = this.sourcePosition.parent;\n\t\tconst sourceRange = Range._createIn( mergedElement );\n\n\t\t_move( sourceRange, this.targetPosition );\n\t\t_move( Range._createOn( mergedElement ), this.graveyardPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.sourcePosition = json.sourcePosition.toJSON();\n\t\tjson.targetPosition = json.targetPosition.toJSON();\n\t\tjson.graveyardPosition = json.graveyardPosition.toJSON();\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'MergeOperation';\n\t}\n\n\t/**\n\t * Creates `MergeOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst sourcePosition = Position.fromJSON( json.sourcePosition, document );\n\t\tconst targetPosition = Position.fromJSON( json.targetPosition, document );\n\t\tconst graveyardPosition = Position.fromJSON( json.graveyardPosition, document );\n\n\t\treturn new this( sourcePosition, json.howMany, targetPosition, graveyardPosition, json.baseVersion );\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `MergeOperation( ${ this.baseVersion } ): ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.sourcePosition } -> ${ this.targetPosition }` +\n\t// @if CK_DEBUG_ENGINE //\t\t` ( ${ this.howMany } ), ${ this.graveyardPosition }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/splitoperation\n */\n\nimport Operation from './operation';\nimport MergeOperation from './mergeoperation';\nimport Position from '../position';\nimport Range from '../range';\nimport { _insert, _move } from './utils';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Operation to split {@link module:engine/model/element~Element an element} at given\n * {@link module:engine/model/operation/splitoperation~SplitOperation#splitPosition split position} into two elements,\n * both containing a part of the element's original content.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class SplitOperation extends Operation {\n\t/**\n\t * Creates a split operation.\n\t *\n\t * @param {module:engine/model/position~Position} splitPosition Position at which an element should be split.\n\t * @param {Number} howMany Total offset size of elements that are in the split element after `position`.\n\t * @param {module:engine/model/position~Position|null} graveyardPosition Position in the graveyard root before the element which\n\t * should be used as a parent of the nodes after `position`. If it is not set, a copy of the the `position` parent will be used.\n\t * @param {Number|null} baseVersion Document {@link module:engine/model/document~Document#version} on which operation\n\t * can be applied or `null` if the operation operates on detached (non-document) tree.\n\t */\n\tconstructor( splitPosition, howMany, graveyardPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position at which an element should be split.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/splitoperation~SplitOperation#splitPosition\n\t\t */\n\t\tthis.splitPosition = splitPosition.clone();\n\t\t// Keep position sticking to the next node. This way any new content added at the place where the element is split\n\t\t// will be left in the original element.\n\t\tthis.splitPosition.stickiness = 'toNext';\n\n\t\t/**\n\t\t * Total offset size of elements that are in the split element after `position`.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/splitoperation~SplitOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position at which the clone of split element (or element from graveyard) will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/splitoperation~SplitOperation#insertionPosition\n\t\t */\n\t\tthis.insertionPosition = SplitOperation.getInsertionPosition( splitPosition );\n\t\tthis.insertionPosition.stickiness = 'toNone';\n\n\t\t/**\n\t\t * Position in the graveyard root before the element which should be used as a parent of the nodes after `position`.\n\t\t * If it is not set, a copy of the the `position` parent will be used.\n\t\t *\n\t\t * The default behavior is to clone the split element. Element from graveyard is used during undo.\n\t\t *\n\t\t * @member {module:engine/model/position~Position|null} #graveyardPosition\n\t\t */\n\t\tthis.graveyardPosition = graveyardPosition ? graveyardPosition.clone() : null;\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\tthis.graveyardPosition.stickiness = 'toNext';\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'split';\n\t}\n\n\t/**\n\t * Position inside the new clone of a split element.\n\t *\n\t * This is a position where nodes that are after the split position will be moved to.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/position~Position}\n\t */\n\tget moveTargetPosition() {\n\t\tconst path = this.insertionPosition.path.slice();\n\t\tpath.push( 0 );\n\n\t\treturn new Position( this.insertionPosition.root, path );\n\t}\n\n\t/**\n\t * Artificial range that contains all the nodes from the split element that will be moved to the new element.\n\t * The range starts at {@link ~#splitPosition} and ends in the same parent, at `POSITIVE_INFINITY` offset.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/range~Range}\n\t */\n\tget movedRange() {\n\t\tconst end = this.splitPosition.getShiftedBy( Number.POSITIVE_INFINITY );\n\n\t\treturn new Range( this.splitPosition, end );\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\tconst split = new this.constructor( this.splitPosition, this.howMany, this.graveyardPosition, this.baseVersion );\n\t\tsplit.insertionPosition = this.insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/mergeoperation~MergeOperation}\n\t */\n\tgetReversed() {\n\t\tconst graveyard = this.splitPosition.root.document.graveyard;\n\t\tconst graveyardPosition = new Position( graveyard, [ 0 ] );\n\n\t\treturn new MergeOperation( this.moveTargetPosition, this.howMany, this.splitPosition, graveyardPosition, this.baseVersion + 1 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_validate() {\n\t\tconst element = this.splitPosition.parent;\n\t\tconst offset = this.splitPosition.offset;\n\n\t\t// Validate whether split operation has correct parameters.\n\t\tif ( !element || element.maxOffset < offset ) {\n\t\t\t/**\n\t\t\t * Split position is invalid.\n\t\t\t *\n\t\t\t * @error split-operation-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-position-invalid: Split position is invalid.', this );\n\t\t} else if ( !element.parent ) {\n\t\t\t/**\n\t\t\t * Cannot split root element.\n\t\t\t *\n\t\t\t * @error split-operation-split-in-root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-split-in-root: Cannot split root element.', this );\n\t\t} else if ( this.howMany != element.maxOffset - this.splitPosition.offset ) {\n\t\t\t/**\n\t\t\t * Split operation specifies wrong number of nodes to move.\n\t\t\t *\n\t\t\t * @error split-operation-how-many-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-how-many-invalid: Split operation specifies wrong number of nodes to move.', this );\n\t\t} else if ( this.graveyardPosition && !this.graveyardPosition.nodeAfter ) {\n\t\t\t/**\n\t\t\t * Graveyard position invalid.\n\t\t\t *\n\t\t\t * @error split-operation-graveyard-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'split-operation-graveyard-position-invalid: Graveyard position invalid.', this );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst splitElement = this.splitPosition.parent;\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\t_move( Range._createFromPositionAndShift( this.graveyardPosition, 1 ), this.insertionPosition );\n\t\t} else {\n\t\t\tconst newElement = splitElement._clone();\n\n\t\t\t_insert( this.insertionPosition, newElement );\n\t\t}\n\n\t\tconst sourceRange = new Range(\n\t\t\tPosition._createAt( splitElement, this.splitPosition.offset ),\n\t\t\tPosition._createAt( splitElement, splitElement.maxOffset )\n\t\t);\n\n\t\t_move( sourceRange, this.moveTargetPosition );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.splitPosition = this.splitPosition.toJSON();\n\t\tjson.insertionPosition = this.insertionPosition.toJSON();\n\n\t\tif ( this.graveyardPosition ) {\n\t\t\tjson.graveyardPosition = this.graveyardPosition.toJSON();\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'SplitOperation';\n\t}\n\n\t/**\n\t * Helper function that returns a default insertion position basing on given `splitPosition`. The default insertion\n\t * position is after the split element.\n\t *\n\t * @param {module:engine/model/position~Position} splitPosition\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic getInsertionPosition( splitPosition ) {\n\t\tconst path = splitPosition.path.slice( 0, -1 );\n\t\tpath[ path.length - 1 ]++;\n\n\t\treturn new Position( splitPosition.root, path );\n\t}\n\n\t/**\n\t * Creates `SplitOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/splitoperation~SplitOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst splitPosition = Position.fromJSON( json.splitPosition, document );\n\t\tconst insertionPosition = Position.fromJSON( json.insertionPosition, document );\n\t\tconst graveyardPosition = json.graveyardPosition ? Position.fromJSON( json.graveyardPosition, document ) : null;\n\n\t\tconst split = new this( splitPosition, json.howMany, graveyardPosition, json.baseVersion );\n\t\tsplit.insertionPosition = insertionPosition;\n\n\t\treturn split;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `SplitOperation( ${ this.baseVersion } ): ${ this.splitPosition } ` +\n\t// @if CK_DEBUG_ENGINE //\t\t`( ${ this.howMany } ) -> ${ this.insertionPosition }` +\n\t// @if CK_DEBUG_ENGINE //\t\t`${ this.graveyardPosition ? ' with ' + this.graveyardPosition : '' }`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/rootelement\n */\n\nimport Element from './element';\n\n/**\n * Type of {@link module:engine/model/element~Element} that is a root of a model tree.\n * @extends module:engine/model/element~Element\n */\nexport default class RootElement extends Element {\n\t/**\n\t * Creates root element.\n\t *\n\t * @param {module:engine/model/document~Document} doc Document that is an owner of this root.\n\t * @param {String} name Node name.\n\t * @param {String} [rootName='main'] Unique root name used to identify this root\n\t * element by {@link module:engine/model/document~Document}.\n\t */\n\tconstructor( doc, name, rootName = 'main' ) {\n\t\tsuper( name );\n\n\t\t/**\n\t\t * Document that is an owner of this root.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/document~Document}\n\t\t */\n\t\tthis._doc = doc;\n\n\t\t/**\n\t\t * Unique root name used to identify this root element by {@link module:engine/model/document~Document}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.rootName = rootName;\n\t}\n\n\t/**\n\t * {@link module:engine/model/document~Document Document} that owns this root element.\n\t *\n\t * In contrary, to {@link module:engine/model/node~Node node}, root element always have a `document`.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/document~Document|null}\n\t */\n\tget document() {\n\t\treturn this._doc;\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\trootElement.is( 'rootElement' ); // -> true\n\t *\t\trootElement.is( 'element' ); // -> true\n\t *\t\trootElement.is( 'node' ); // -> true\n\t *\t\trootElement.is( 'model:rootElement' ); // -> true\n\t *\t\trootElement.is( 'model:element' ); // -> true\n\t *\t\trootElement.is( 'model:node' ); // -> true\n\t *\n\t *\t\trootElement.is( 'view:element' ); // -> false\n\t *\t\trootElement.is( 'documentFragment' ); // -> false\n\t *\n\t * Assuming that the object being checked is an element, you can also check its\n\t * {@link module:engine/model/element~Element#name name}:\n\t *\n\t *\t\trootElement.is( '$root' ); // -> true if this is a $root element\n\t *\t\trootElement.is( 'rootElement', '$root' ); // -> same as above\n\t *\t\ttext.is( '$root' ); -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name ) {\n\t\tconst cutType = type.replace( 'model:', '' );\n\t\tif ( !name ) {\n\t\t\treturn cutType == 'rootElement' || super.is( type );\n\t\t} else {\n\t\t\treturn ( cutType == 'rootElement' && name == this.name ) || super.is( type, name );\n\t\t}\n\t}\n\n\t/**\n\t * Converts `RootElement` instance to `String` containing it's name.\n\t *\n\t * @returns {String} `RootElement` instance converted to `String`.\n\t */\n\ttoJSON() {\n\t\treturn this.rootName;\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn this.rootName;\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // log() {\n\t// @if CK_DEBUG_ENGINE // \tconsole.log( 'ModelRootElement: ' + this );\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/writer\n */\n\nimport AttributeOperation from './operation/attributeoperation';\nimport DetachOperation from './operation/detachoperation';\nimport InsertOperation from './operation/insertoperation';\nimport MarkerOperation from './operation/markeroperation';\nimport MoveOperation from './operation/moveoperation';\nimport RenameOperation from './operation/renameoperation';\nimport RootAttributeOperation from './operation/rootattributeoperation';\nimport SplitOperation from './operation/splitoperation';\nimport MergeOperation from './operation/mergeoperation';\n\nimport DocumentFragment from './documentfragment';\nimport Text from './text';\nimport Element from './element';\nimport RootElement from './rootelement';\nimport Position from './position';\nimport Range from './range.js';\nimport DocumentSelection from './documentselection';\n\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The model can only be modified by using the writer. It should be used whenever you want to create a node, modify\n * child nodes, attributes or text, set the selection's position and its attributes.\n *\n * The instance of the writer is only available in the {@link module:engine/model/model~Model#change `change()`} or\n * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()`}.\n *\n *\t\tmodel.change( writer => {\n *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n *\t\t} );\n *\n * Note that the writer should never be stored and used outside of the `change()` and\n * `enqueueChange()` blocks.\n *\n * Note that writer's methods do not check the {@link module:engine/model/schema~Schema}. It is possible\n * to create incorrect model structures by using the writer. Read more about in\n * {@glink framework/guides/deep-dive/schema#who-checks-the-schema \"Who checks the schema?\"}.\n *\n * @see module:engine/model/model~Model#change\n * @see module:engine/model/model~Model#enqueueChange\n */\nexport default class Writer {\n\t/**\n\t * Creates a writer instance.\n\t *\n\t * **Note:** It is not recommended to use it directly. Use {@link module:engine/model/model~Model#change `Model#change()`} or\n\t * {@link module:engine/model/model~Model#enqueueChange `Model#enqueueChange()`} instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/model~Model} model\n\t * @param {module:engine/model/batch~Batch} batch\n\t */\n\tconstructor( model, batch ) {\n\t\t/**\n\t\t * Instance of the model on which this writer operates.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The batch to which this writer will add changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/batch~Batch}\n\t\t */\n\t\tthis.batch = batch;\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/text~Text text node}.\n\t *\n\t *\t\twriter.createText( 'foo' );\n\t *\t\twriter.createText( 'foo', { bold: true } );\n\t *\n\t * @param {String} data Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @returns {module:engine/model/text~Text} Created text node.\n\t */\n\tcreateText( data, attributes ) {\n\t\treturn new Text( data, attributes );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/element~Element element}.\n\t *\n\t *\t\twriter.createElement( 'paragraph' );\n\t *\t\twriter.createElement( 'paragraph', { alignment: 'center' } );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @returns {module:engine/model/element~Element} Created element.\n\t */\n\tcreateElement( name, attributes ) {\n\t\treturn new Element( name, attributes );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/model/documentfragment~DocumentFragment document fragment}.\n\t *\n\t * @returns {module:engine/model/documentfragment~DocumentFragment} Created document fragment.\n\t */\n\tcreateDocumentFragment() {\n\t\treturn new DocumentFragment();\n\t}\n\n\t/**\n\t * Inserts item on given position.\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.insert( paragraph, position );\n\t *\n\t * Instead of using position you can use parent and offset:\n\t *\n\t *\t\tconst text = writer.createText( 'foo' );\n\t *\t\twriter.insert( text, paragraph, 5 );\n\t *\n\t * You can also use `end` instead of the offset to insert at the end:\n\t *\n\t *\t\tconst text = writer.createText( 'foo' );\n\t *\t\twriter.insert( text, paragraph, 'end' );\n\t *\n\t * Or insert before or after another element:\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.insert( paragraph, anotherParagraph, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * Note that if the item already has parent it will be removed from the previous parent.\n\t *\n\t * Note that you cannot re-insert a node from a document to a different document or a document fragment. In this case,\n\t * `model-writer-insert-forbidden-move` is thrown.\n\t *\n\t * If you want to move {@link module:engine/model/range~Range range} instead of an\n\t * {@link module:engine/model/item~Item item} use {@link module:engine/model/writer~Writer#move `Writer#move()`}.\n\t *\n\t * **Note:** For a paste-like content insertion mechanism see\n\t * {@link module:engine/model/model~Model#insertContent `model.insertContent()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/documentfragment~DocumentFragment} item Item or document\n\t * fragment to insert.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * second parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsert( item, itemOrPosition, offset = 0 ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( item instanceof Text && item.data == '' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = Position._createAt( itemOrPosition, offset );\n\n\t\t// If item has a parent already.\n\t\tif ( item.parent ) {\n\t\t\t// We need to check if item is going to be inserted within the same document.\n\t\t\tif ( isSameTree( item.root, position.root ) ) {\n\t\t\t\t// If it's we just need to move it.\n\t\t\t\tthis.move( Range._createOn( item ), position );\n\n\t\t\t\treturn;\n\t\t\t}\n\t\t\t// If it isn't the same root.\n\t\t\telse {\n\t\t\t\tif ( item.root.document ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Cannot move a node from a document to a different tree.\n\t\t\t\t\t * It is forbidden to move a node that was already in a document outside of it.\n\t\t\t\t\t *\n\t\t\t\t\t * @error model-writer-insert-forbidden-move\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'model-writer-insert-forbidden-move: ' +\n\t\t\t\t\t\t'Cannot move a node from a document to a different tree. ' +\n\t\t\t\t\t\t'It is forbidden to move a node that was already in a document outside of it.',\n\t\t\t\t\t\tthis\n\t\t\t\t\t);\n\t\t\t\t} else {\n\t\t\t\t\t// Move between two different document fragments or from document fragment to a document is possible.\n\t\t\t\t\t// In that case, remove the item from it's original parent.\n\t\t\t\t\tthis.remove( item );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tconst version = position.root.document ? position.root.document.version : null;\n\n\t\tconst insert = new InsertOperation( position, item, version );\n\n\t\tif ( item instanceof Text ) {\n\t\t\tinsert.shouldReceiveAttributes = true;\n\t\t}\n\n\t\tthis.batch.addOperation( insert );\n\t\tthis.model.applyOperation( insert );\n\n\t\t// When element is a DocumentFragment we need to move its markers to Document#markers.\n\t\tif ( item instanceof DocumentFragment ) {\n\t\t\tfor ( const [ markerName, markerRange ] of item.markers ) {\n\t\t\t\t// We need to migrate marker range from DocumentFragment to Document.\n\t\t\t\tconst rangeRootPosition = Position._createAt( markerRange.root, 0 );\n\t\t\t\tconst range = new Range(\n\t\t\t\t\tmarkerRange.start._getCombined( rangeRootPosition, position ),\n\t\t\t\t\tmarkerRange.end._getCombined( rangeRootPosition, position )\n\t\t\t\t);\n\n\t\t\t\tconst options = { range, usingOperation: true, affectsData: true };\n\n\t\t\t\tif ( this.model.markers.has( markerName ) ) {\n\t\t\t\t\tthis.updateMarker( markerName, options );\n\t\t\t\t} else {\n\t\t\t\t\tthis.addMarker( markerName, options );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates and inserts text on given position. You can optionally set text attributes:\n\t *\n\t *\t\twriter.insertText( 'foo', position );\n\t *\t\twriter.insertText( 'foo', { bold: true }, position );\n\t *\n\t * Instead of using position you can use parent and offset or define that text should be inserted at the end\n\t * or before or after other node:\n\t *\n\t *\t\t// Inserts 'foo' in paragraph, at offset 5:\n\t *\t\twriter.insertText( 'foo', paragraph, 5 );\n\t *\t\t// Inserts 'foo' at the end of a paragraph:\n\t *\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t// Inserts 'foo' after an image:\n\t *\t\twriter.insertText( 'foo', image, 'after' );\n\t *\n\t * These parameters work in the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * @param {String} data Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * third parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsertText( text, attributes, itemOrPosition, offset ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element || attributes instanceof Position ) {\n\t\t\tthis.insert( this.createText( text ), attributes, itemOrPosition );\n\t\t} else {\n\t\t\tthis.insert( this.createText( text, attributes ), itemOrPosition, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and inserts element on given position. You can optionally set attributes:\n\t *\n\t *\t\twriter.insertElement( 'paragraph', position );\n\t *\t\twriter.insertElement( 'paragraph', { alignment: 'center' }, position );\n\t *\n\t * Instead of using position you can use parent and offset or define that text should be inserted at the end\n\t * or before or after other node:\n\t *\n\t *\t\t// Inserts paragraph in the root at offset 5:\n\t *\t\twriter.insertElement( 'paragraph', root, 5 );\n\t *\t\t// Inserts paragraph at the end of a blockquote:\n\t *\t\twriter.insertElement( 'paragraph', blockquote, 'end' );\n\t *\t\t// Inserts after an image:\n\t *\t\twriter.insertElement( 'paragraph', image, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * third parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tinsertElement( name, attributes, itemOrPosition, offset ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element || attributes instanceof Position ) {\n\t\t\tthis.insert( this.createElement( name ), attributes, itemOrPosition );\n\t\t} else {\n\t\t\tthis.insert( this.createElement( name, attributes ), itemOrPosition, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Inserts item at the end of the given parent.\n\t *\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\twriter.append( paragraph, root );\n\t *\n\t * Note that if the item already has parent it will be removed from the previous parent.\n\t *\n\t * If you want to move {@link module:engine/model/range~Range range} instead of an\n\t * {@link module:engine/model/item~Item item} use {@link module:engine/model/writer~Writer#move `Writer#move()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/documentfragment~DocumentFragment}\n\t * item Item or document fragment to insert.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappend( item, parent ) {\n\t\tthis.insert( item, parent, 'end' );\n\t}\n\n\t/**\n\t * Creates text node and inserts it at the end of the parent. You can optionally set text attributes:\n\t *\n\t *\t\twriter.appendText( 'foo', paragraph );\n\t *\t\twriter.appendText( 'foo', { bold: true }, paragraph );\n\t *\n\t * @param {String} text Text data.\n\t * @param {Object} [attributes] Text attributes.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappendText( text, attributes, parent ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element ) {\n\t\t\tthis.insert( this.createText( text ), attributes, 'end' );\n\t\t} else {\n\t\t\tthis.insert( this.createText( text, attributes ), parent, 'end' );\n\t\t}\n\t}\n\n\t/**\n\t * Creates element and inserts it at the end of the parent. You can optionally set attributes:\n\t *\n\t *\t\twriter.appendElement( 'paragraph', root );\n\t *\t\twriter.appendElement( 'paragraph', { alignment: 'center' }, root );\n\t *\n\t * @param {String} name Name of the element.\n\t * @param {Object} [attributes] Elements attributes.\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent\n\t */\n\tappendElement( name, attributes, parent ) {\n\t\tif ( attributes instanceof DocumentFragment || attributes instanceof Element ) {\n\t\t\tthis.insert( this.createElement( name ), attributes, 'end' );\n\t\t} else {\n\t\t\tthis.insert( this.createElement( name, attributes ), parent, 'end' );\n\t\t}\n\t}\n\n\t/**\n\t * Sets value of the attribute with given key on a {@link module:engine/model/item~Item model item}\n\t * or on a {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {*} value Attribute new value.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range on which the attribute will be set.\n\t */\n\tsetAttribute( key, value, itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( itemOrRange instanceof Range ) {\n\t\t\tconst ranges = itemOrRange.getMinimalFlatRanges();\n\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tsetAttributeOnRange( this, key, value, range );\n\t\t\t}\n\t\t} else {\n\t\t\tsetAttributeOnItem( this, key, value, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Sets values of attributes on a {@link module:engine/model/item~Item model item}\n\t * or on a {@link module:engine/model/range~Range range}.\n\t *\n\t *\t\twriter.setAttributes( {\n\t *\t\t\tbold: true,\n\t *\t\t\titalic: true\n\t *\t\t}, range );\n\t *\n\t * @param {Object} attributes Attributes keys and values.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range on which the attributes will be set.\n\t */\n\tsetAttributes( attributes, itemOrRange ) {\n\t\tfor ( const [ key, val ] of toMap( attributes ) ) {\n\t\t\tthis.setAttribute( key, val, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Removes an attribute with given key from a {@link module:engine/model/item~Item model item}\n\t * or from a {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range from which the attribute will be removed.\n\t */\n\tremoveAttribute( key, itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( itemOrRange instanceof Range ) {\n\t\t\tconst ranges = itemOrRange.getMinimalFlatRanges();\n\n\t\t\tfor ( const range of ranges ) {\n\t\t\t\tsetAttributeOnRange( this, key, null, range );\n\t\t\t}\n\t\t} else {\n\t\t\tsetAttributeOnItem( this, key, null, itemOrRange );\n\t\t}\n\t}\n\n\t/**\n\t * Removes all attributes from all elements in the range or from the given item.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange\n\t * Model item or range from which all attributes will be removed.\n\t */\n\tclearAttributes( itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst removeAttributesFromItem = item => {\n\t\t\tfor ( const attribute of item.getAttributeKeys() ) {\n\t\t\t\tthis.removeAttribute( attribute, item );\n\t\t\t}\n\t\t};\n\n\t\tif ( !( itemOrRange instanceof Range ) ) {\n\t\t\tremoveAttributesFromItem( itemOrRange );\n\t\t} else {\n\t\t\tfor ( const item of itemOrRange.getItems() ) {\n\t\t\t\tremoveAttributesFromItem( item );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Moves all items in the source range to the target position.\n\t *\n\t *\t\twriter.move( sourceRange, targetPosition );\n\t *\n\t * Instead of the target position you can use parent and offset or define that range should be moved to the end\n\t * or before or after chosen item:\n\t *\n\t *\t\t// Moves all items in the range to the paragraph at offset 5:\n\t *\t\twriter.move( sourceRange, paragraph, 5 );\n\t *\t\t// Moves all items in the range to the end of a blockquote:\n\t *\t\twriter.move( sourceRange, blockquote, 'end' );\n\t *\t\t// Moves all items in the range to a position after an image:\n\t *\t\twriter.move( sourceRange, image, 'after' );\n\t *\n\t * These parameters works the same way as {@link #createPositionAt `writer.createPositionAt()`}.\n\t *\n\t * Note that items can be moved only within the same tree. It means that you can move items within the same root\n\t * (element or document fragment) or between {@link module:engine/model/document~Document#roots documents roots},\n\t * but you can not move items from document fragment to the document or from one detached element to another. Use\n\t * {@link module:engine/model/writer~Writer#insert} in such cases.\n\t *\n\t * @param {module:engine/model/range~Range} range Source range.\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * second parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tmove( range, itemOrPosition, offset ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !( range instanceof Range ) ) {\n\t\t\t/**\n\t\t\t * Invalid range to move.\n\t\t\t *\n\t\t\t * @error writer-move-invalid-range\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-invalid-range: Invalid range to move.', this );\n\t\t}\n\n\t\tif ( !range.isFlat ) {\n\t\t\t/**\n\t\t\t * Range to move is not flat.\n\t\t\t *\n\t\t\t * @error writer-move-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-range-not-flat: Range to move is not flat.', this );\n\t\t}\n\n\t\tconst position = Position._createAt( itemOrPosition, offset );\n\n\t\t// Do not move anything if the move target is same as moved range start.\n\t\tif ( position.isEqual( range.start ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\tthis._addOperationForAffectedMarkers( 'move', range );\n\n\t\tif ( !isSameTree( range.root, position.root ) ) {\n\t\t\t/**\n\t\t\t * Range is going to be moved within not the same document. Please use\n\t\t\t * {@link module:engine/model/writer~Writer#insert insert} instead.\n\t\t\t *\n\t\t\t * @error writer-move-different-document\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-move-different-document: Range is going to be moved between different documents.', this );\n\t\t}\n\n\t\tconst version = range.root.document ? range.root.document.version : null;\n\t\tconst operation = new MoveOperation( range.start, range.end.offset - range.start.offset, position, version );\n\n\t\tthis.batch.addOperation( operation );\n\t\tthis.model.applyOperation( operation );\n\t}\n\n\t/**\n\t * Removes given model {@link module:engine/model/item~Item item} or {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/range~Range} itemOrRange Model item or range to remove.\n\t */\n\tremove( itemOrRange ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst rangeToRemove = itemOrRange instanceof Range ? itemOrRange : Range._createOn( itemOrRange );\n\t\tconst ranges = rangeToRemove.getMinimalFlatRanges().reverse();\n\n\t\tfor ( const flat of ranges ) {\n\t\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\t\tthis._addOperationForAffectedMarkers( 'move', flat );\n\n\t\t\tapplyRemoveOperation( flat.start, flat.end.offset - flat.start.offset, this.batch, this.model );\n\t\t}\n\t}\n\n\t/**\n\t * Merges two siblings at the given position.\n\t *\n\t * Node before and after the position have to be an element. Otherwise `writer-merge-no-element-before` or\n\t * `writer-merge-no-element-after` error will be thrown.\n\t *\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\tmerge( position ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst nodeBefore = position.nodeBefore;\n\t\tconst nodeAfter = position.nodeAfter;\n\n\t\t// If part of the marker is removed, create additional marker operation for undo purposes.\n\t\tthis._addOperationForAffectedMarkers( 'merge', position );\n\n\t\tif ( !( nodeBefore instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Node before merge position must be an element.\n\t\t\t *\n\t\t\t * @error writer-merge-no-element-before\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-merge-no-element-before: Node before merge position must be an element.', this );\n\t\t}\n\n\t\tif ( !( nodeAfter instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Node after merge position must be an element.\n\t\t\t *\n\t\t\t * @error writer-merge-no-element-after\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-merge-no-element-after: Node after merge position must be an element.', this );\n\t\t}\n\n\t\tif ( !position.root.document ) {\n\t\t\tthis._mergeDetached( position );\n\t\t} else {\n\t\t\tthis._merge( position );\n\t\t}\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionFromPath `Model#createPositionFromPath()`}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionFromPath( root, path, stickiness ) {\n\t\treturn this.model.createPositionFromPath( root, path, stickiness );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionAt `Model#createPositionAt()`}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn this.model.createPositionAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionAfter `Model#createPositionAfter()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn this.model.createPositionAfter( item );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createPositionBefore `Model#createPositionBefore()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn this.model.createPositionBefore( item );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRange `Model#createRange()`}.\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn this.model.createRange( start, end );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRangeIn `Model#createRangeIn()`}.\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn this.model.createRangeIn( element );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createRangeOn `Model#createRangeOn()`}.\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeOn( element ) {\n\t\treturn this.model.createRangeOn( element );\n\t}\n\n\t/**\n\t * Shortcut for {@link module:engine/model/model~Model#createSelection `Model#createSelection()`}.\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @returns {module:engine/model/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn this.model.createSelection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Performs merge action in a detached tree.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\t_mergeDetached( position ) {\n\t\tconst nodeBefore = position.nodeBefore;\n\t\tconst nodeAfter = position.nodeAfter;\n\n\t\tthis.move( Range._createIn( nodeAfter ), Position._createAt( nodeBefore, 'end' ) );\n\t\tthis.remove( nodeAfter );\n\t}\n\n\t/**\n\t * Performs merge action in a non-detached tree.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position Position between merged elements.\n\t */\n\t_merge( position ) {\n\t\tconst targetPosition = Position._createAt( position.nodeBefore, 'end' );\n\t\tconst sourcePosition = Position._createAt( position.nodeAfter, 0 );\n\n\t\tconst graveyard = position.root.document.graveyard;\n\t\tconst graveyardPosition = new Position( graveyard, [ 0 ] );\n\n\t\tconst version = position.root.document.version;\n\n\t\tconst merge = new MergeOperation( sourcePosition, position.nodeAfter.maxOffset, targetPosition, graveyardPosition, version );\n\n\t\tthis.batch.addOperation( merge );\n\t\tthis.model.applyOperation( merge );\n\t}\n\n\t/**\n\t * Renames the given element.\n\t *\n\t * @param {module:engine/model/element~Element} element The element to rename.\n\t * @param {String} newName New element name.\n\t */\n\trename( element, newName ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !( element instanceof Element ) ) {\n\t\t\t/**\n\t\t\t * Trying to rename an object which is not an instance of Element.\n\t\t\t *\n\t\t\t * @error writer-rename-not-element-instance\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-rename-not-element-instance: Trying to rename an object which is not an instance of Element.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst version = element.root.document ? element.root.document.version : null;\n\t\tconst renameOperation = new RenameOperation( Position._createBefore( element ), element.name, newName, version );\n\n\t\tthis.batch.addOperation( renameOperation );\n\t\tthis.model.applyOperation( renameOperation );\n\t}\n\n\t/**\n\t * Splits elements starting from the given position and going to the top of the model tree as long as given\n\t * `limitElement` is reached. When `limitElement` is not defined then only the parent of the given position will be split.\n\t *\n\t * The element needs to have a parent. It cannot be a root element nor a document fragment.\n\t * The `writer-split-element-no-parent` error will be thrown if you try to split an element with no parent.\n\t *\n\t * @param {module:engine/model/position~Position} position Position of split.\n\t * @param {module:engine/model/node~Node} [limitElement] Stop splitting when this element will be reached.\n\t * @returns {Object} result Split result.\n\t * @returns {module:engine/model/position~Position} result.position Position between split elements.\n\t * @returns {module:engine/model/range~Range} result.range Range that stars from the end of the first split element and ends\n\t * at the beginning of the first copy element.\n\t */\n\tsplit( position, limitElement ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tlet splitElement = position.parent;\n\n\t\tif ( !splitElement.parent ) {\n\t\t\t/**\n\t\t\t * Element with no parent can not be split.\n\t\t\t *\n\t\t\t * @error writer-split-element-no-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-split-element-no-parent: Element with no parent can not be split.', this );\n\t\t}\n\n\t\t// When limit element is not defined lets set splitElement parent as limit.\n\t\tif ( !limitElement ) {\n\t\t\tlimitElement = splitElement.parent;\n\t\t}\n\n\t\tif ( !position.parent.getAncestors( { includeSelf: true } ).includes( limitElement ) ) {\n\t\t\tthrow new CKEditorError( 'writer-split-invalid-limit-element: Limit element is not a position ancestor.', this );\n\t\t}\n\n\t\t// We need to cache elements that will be created as a result of the first split because\n\t\t// we need to create a range from the end of the first split element to the beginning of the\n\t\t// first copy element. This should be handled by LiveRange but it doesn't work on detached nodes.\n\t\tlet firstSplitElement, firstCopyElement;\n\n\t\tdo {\n\t\t\tconst version = splitElement.root.document ? splitElement.root.document.version : null;\n\t\t\tconst howMany = splitElement.maxOffset - position.offset;\n\t\t\tconst split = new SplitOperation( position, howMany, null, version );\n\n\t\t\tthis.batch.addOperation( split );\n\t\t\tthis.model.applyOperation( split );\n\n\t\t\t// Cache result of the first split.\n\t\t\tif ( !firstSplitElement && !firstCopyElement ) {\n\t\t\t\tfirstSplitElement = splitElement;\n\t\t\t\tfirstCopyElement = position.parent.nextSibling;\n\t\t\t}\n\n\t\t\tposition = this.createPositionAfter( position.parent );\n\t\t\tsplitElement = position.parent;\n\t\t} while ( splitElement !== limitElement );\n\n\t\treturn {\n\t\t\tposition,\n\t\t\trange: new Range( Position._createAt( firstSplitElement, 'end' ), Position._createAt( firstCopyElement, 0 ) )\n\t\t};\n\t}\n\n\t/**\n\t * Wraps the given range with the given element or with a new element (if a string was passed).\n\t *\n\t * **Note:** range to wrap should be a \"flat range\" (see {@link module:engine/model/range~Range#isFlat `Range#isFlat`}).\n\t * If not, an error will be thrown.\n\t *\n\t * @param {module:engine/model/range~Range} range Range to wrap.\n\t * @param {module:engine/model/element~Element|String} elementOrString Element or name of element to wrap the range with.\n\t */\n\twrap( range, elementOrString ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !range.isFlat ) {\n\t\t\t/**\n\t\t\t * Range to wrap is not flat.\n\t\t\t *\n\t\t\t * @error writer-wrap-range-not-flat\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-range-not-flat: Range to wrap is not flat.', this );\n\t\t}\n\n\t\tconst element = elementOrString instanceof Element ? elementOrString : new Element( elementOrString );\n\n\t\tif ( element.childCount > 0 ) {\n\t\t\t/**\n\t\t\t * Element to wrap with is not empty.\n\t\t\t *\n\t\t\t * @error writer-wrap-element-not-empty\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-element-not-empty: Element to wrap with is not empty.', this );\n\t\t}\n\n\t\tif ( element.parent !== null ) {\n\t\t\t/**\n\t\t\t * Element to wrap with is already attached to a tree model.\n\t\t\t *\n\t\t\t * @error writer-wrap-element-attached\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-wrap-element-attached: Element to wrap with is already attached to tree model.', this );\n\t\t}\n\n\t\tthis.insert( element, range.start );\n\n\t\t// Shift the range-to-wrap because we just inserted an element before that range.\n\t\tconst shiftedRange = new Range( range.start.getShiftedBy( 1 ), range.end.getShiftedBy( 1 ) );\n\n\t\tthis.move( shiftedRange, Position._createAt( element, 0 ) );\n\t}\n\n\t/**\n\t * Unwraps children of the given element – all its children are moved before it and then the element is removed.\n\t * Throws error if you try to unwrap an element which does not have a parent.\n\t *\n\t * @param {module:engine/model/element~Element} element Element to unwrap.\n\t */\n\tunwrap( element ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( element.parent === null ) {\n\t\t\t/**\n\t\t\t * Trying to unwrap an element which has no parent.\n\t\t\t *\n\t\t\t * @error writer-unwrap-element-no-parent\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-unwrap-element-no-parent: Trying to unwrap an element which has no parent.', this );\n\t\t}\n\n\t\tthis.move( Range._createIn( element ), this.createPositionAfter( element ) );\n\t\tthis.remove( element );\n\t}\n\n\t/**\n\t * Adds a {@link module:engine/model/markercollection~Marker marker}. Marker is a named range, which tracks\n\t * changes in the document and updates its range automatically, when model tree changes.\n\t *\n\t * As the first parameter you can set marker name.\n\t *\n\t * The required `options.usingOperation` parameter lets you decide if the marker should be managed by operations or not. See\n\t * {@link module:engine/model/markercollection~Marker marker class description} to learn about the difference between\n\t * markers managed by operations and not-managed by operations.\n\t *\n\t * The `options.affectsData` parameter, which defaults to `false`, allows you to define if a marker affects the data. It should be\n\t * `true` when the marker change changes the data returned by the\n\t * {@link module:core/editor/utils/dataapimixin~DataApi#getData `editor.getData()`} method.\n\t * When set to `true` it fires the {@link module:engine/model/document~Document#event:change:data `change:data`} event.\n\t * When set to `false` it fires the {@link module:engine/model/document~Document#event:change `change`} event.\n\t *\n\t * Create marker directly base on marker's name:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: false } );\n\t *\n\t * Create marker using operation:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: true } );\n\t *\n\t * Create marker that affects the editor data:\n\t *\n\t *\t\taddMarker( markerName, { range, usingOperation: false, affectsData: true } );\n\t *\n\t * Note: For efficiency reasons, it's best to create and keep as little markers as possible.\n\t *\n\t * @see module:engine/model/markercollection~Marker\n\t * @param {String} name Name of a marker to create - must be unique.\n\t * @param {Object} options\n\t * @param {Boolean} options.usingOperation Flag indicating that the marker should be added by MarkerOperation.\n\t * See {@link module:engine/model/markercollection~Marker#managedUsingOperations}.\n\t * @param {module:engine/model/range~Range} options.range Marker range.\n\t * @param {Boolean} [options.affectsData=false] Flag indicating that the marker changes the editor data.\n\t * @returns {module:engine/model/markercollection~Marker} Marker that was set.\n\t */\n\taddMarker( name, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( !options || typeof options.usingOperation != 'boolean' ) {\n\t\t\t/**\n\t\t\t * The `options.usingOperation` parameter is required when adding a new marker.\n\t\t\t *\n\t\t\t * @error writer-addMarker-no-usingOperation\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-addMarker-no-usingOperation: The options.usingOperation parameter is required when adding a new marker.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst usingOperation = options.usingOperation;\n\t\tconst range = options.range;\n\t\tconst affectsData = options.affectsData === undefined ? false : options.affectsData;\n\n\t\tif ( this.model.markers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Marker with provided name already exists.\n\t\t\t *\n\t\t\t * @error writer-addMarker-marker-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-addMarker-marker-exists: Marker with provided name already exists.', this );\n\t\t}\n\n\t\tif ( !range ) {\n\t\t\t/**\n\t\t\t * Range parameter is required when adding a new marker.\n\t\t\t *\n\t\t\t * @error writer-addMarker-no-range\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-addMarker-no-range: Range parameter is required when adding a new marker.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tif ( !usingOperation ) {\n\t\t\treturn this.model.markers._set( name, range, usingOperation, affectsData );\n\t\t}\n\n\t\tapplyMarkerOperation( this, name, null, range, affectsData );\n\n\t\treturn this.model.markers.get( name );\n\t}\n\n\t/**\n\t * Adds, updates or refreshes a {@link module:engine/model/markercollection~Marker marker}. Marker is a named range, which tracks\n\t * changes in the document and updates its range automatically, when model tree changes. Still, it is possible to change the\n\t * marker's range directly using this method.\n\t *\n\t * As the first parameter you can set marker name or instance. If none of them is provided, new marker, with a unique\n\t * name is created and returned.\n\t *\n\t * As the second parameter you can set the new marker data or leave this parameter as empty which will just refresh\n\t * the marker by triggering downcast conversion for it. Refreshing the marker is useful when you want to change\n\t * the marker {@link module:engine/view/element~Element view element} without changing any marker data.\n\t *\n\t * \t\tlet isCommentActive = false;\n\t *\n\t * \t\tmodel.conversion.markerToHighlight( {\n\t * \t\t\tmodel: 'comment',\n\t *\t\t\tview: data => {\n\t *\t\t\t\tconst classes = [ 'comment-marker' ];\n\t *\n\t *\t\t\t\tif ( isCommentActive ) {\n\t *\t\t\t\t\tclasses.push( 'comment-marker--active' );\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\treturn { classes };\n\t *\t\t\t}\n\t * \t\t} );\n\t *\n\t * \t\t// Change the property that indicates if marker is displayed as active or not.\n\t * \t\tisCommentActive = true;\n\t *\n\t * \t\t// And refresh the marker to convert it with additional class.\n\t * \t\tmodel.change( writer => writer.updateMarker( 'comment' ) );\n\t *\n\t * The `options.usingOperation` parameter lets you change if the marker should be managed by operations or not. See\n\t * {@link module:engine/model/markercollection~Marker marker class description} to learn about the difference between\n\t * markers managed by operations and not-managed by operations. It is possible to change this option for an existing marker.\n\t *\n\t * The `options.affectsData` parameter, which defaults to `false`, allows you to define if a marker affects the data. It should be\n\t * `true` when the marker change changes the data returned by\n\t * the {@link module:core/editor/utils/dataapimixin~DataApi#getData `editor.getData()`} method.\n\t * When set to `true` it fires the {@link module:engine/model/document~Document#event:change:data `change:data`} event.\n\t * When set to `false` it fires the {@link module:engine/model/document~Document#event:change `change`} event.\n\t *\n\t * Update marker directly base on marker's name:\n\t *\n\t *\t\tupdateMarker( markerName, { range } );\n\t *\n\t * Update marker using operation:\n\t *\n\t *\t\tupdateMarker( marker, { range, usingOperation: true } );\n\t *\t\tupdateMarker( markerName, { range, usingOperation: true } );\n\t *\n\t * Change marker's option (start using operations to manage it):\n\t *\n\t *\t\tupdateMarker( marker, { usingOperation: true } );\n\t *\n\t * Change marker's option (inform the engine, that the marker does not affect the data anymore):\n\t *\n\t *\t\tupdateMarker( markerName, { affectsData: false } );\n\t *\n\t * @see module:engine/model/markercollection~Marker\n\t * @param {String|module:engine/model/markercollection~Marker} markerOrName Name of a marker to update, or a marker instance.\n\t * @param {Object} [options] If options object is not defined then marker will be refreshed by triggering\n\t * downcast conversion for this marker with the same data.\n\t * @param {module:engine/model/range~Range} [options.range] Marker range to update.\n\t * @param {Boolean} [options.usingOperation] Flag indicated whether the marker should be added by MarkerOperation.\n\t * See {@link module:engine/model/markercollection~Marker#managedUsingOperations}.\n\t * @param {Boolean} [options.affectsData] Flag indicating that the marker changes the editor data.\n\t */\n\tupdateMarker( markerOrName, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst markerName = typeof markerOrName == 'string' ? markerOrName : markerOrName.name;\n\t\tconst currentMarker = this.model.markers.get( markerName );\n\n\t\tif ( !currentMarker ) {\n\t\t\t/**\n\t\t\t * Marker with provided name does not exists.\n\t\t\t *\n\t\t\t * @error writer-updateMarker-marker-not-exists\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-updateMarker-marker-not-exists: Marker with provided name does not exists.', this );\n\t\t}\n\n\t\tif ( !options ) {\n\t\t\tthis.model.markers._refresh( currentMarker );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst hasUsingOperationDefined = typeof options.usingOperation == 'boolean';\n\t\tconst affectsDataDefined = typeof options.affectsData == 'boolean';\n\n\t\t// Use previously defined marker's affectsData if the property is not provided.\n\t\tconst affectsData = affectsDataDefined ? options.affectsData : currentMarker.affectsData;\n\n\t\tif ( !hasUsingOperationDefined && !options.range && !affectsDataDefined ) {\n\t\t\t/**\n\t\t\t * One of the options is required - provide range, usingOperations or affectsData.\n\t\t\t *\n\t\t\t * @error writer-updateMarker-wrong-options\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'writer-updateMarker-wrong-options: One of the options is required - provide range, usingOperations or affectsData.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tconst currentRange = currentMarker.getRange();\n\t\tconst updatedRange = options.range ? options.range : currentRange;\n\n\t\tif ( hasUsingOperationDefined && options.usingOperation !== currentMarker.managedUsingOperations ) {\n\t\t\t// The marker type is changed so it's necessary to create proper operations.\n\t\t\tif ( options.usingOperation ) {\n\t\t\t\t// If marker changes to a managed one treat this as synchronizing existing marker.\n\t\t\t\t// Create `MarkerOperation` with `oldRange` set to `null`, so reverse operation will remove the marker.\n\t\t\t\tapplyMarkerOperation( this, markerName, null, updatedRange, affectsData );\n\t\t\t} else {\n\t\t\t\t// If marker changes to a marker that do not use operations then we need to create additional operation\n\t\t\t\t// that removes that marker first.\n\t\t\t\tapplyMarkerOperation( this, markerName, currentRange, null, affectsData );\n\n\t\t\t\t// Although not managed the marker itself should stay in model and its range should be preserver or changed to passed range.\n\t\t\t\tthis.model.markers._set( markerName, updatedRange, undefined, affectsData );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Marker's type doesn't change so update it accordingly.\n\t\tif ( currentMarker.managedUsingOperations ) {\n\t\t\tapplyMarkerOperation( this, markerName, currentRange, updatedRange, affectsData );\n\t\t} else {\n\t\t\tthis.model.markers._set( markerName, updatedRange, undefined, affectsData );\n\t\t}\n\t}\n\n\t/**\n\t * Removes given {@link module:engine/model/markercollection~Marker marker} or marker with given name.\n\t * The marker is removed accordingly to how it has been created, so if the marker was created using operation,\n\t * it will be destroyed using operation.\n\t *\n\t * @param {module:engine/model/markercollection~Marker|String} markerOrName Marker or marker name to remove.\n\t */\n\tremoveMarker( markerOrName ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tconst name = typeof markerOrName == 'string' ? markerOrName : markerOrName.name;\n\n\t\tif ( !this.model.markers.has( name ) ) {\n\t\t\t/**\n\t\t\t * Trying to remove marker which does not exist.\n\t\t\t *\n\t\t\t * @error writer-removeMarker-no-marker\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'writer-removeMarker-no-marker: Trying to remove marker which does not exist.', this );\n\t\t}\n\n\t\tconst marker = this.model.markers.get( name );\n\n\t\tif ( !marker.managedUsingOperations ) {\n\t\t\tthis.model.markers._remove( name );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst oldRange = marker.getRange();\n\n\t\tapplyMarkerOperation( this, name, oldRange, null, marker.affectsData );\n\t}\n\n\t/**\n\t * Sets the document's selection (ranges and direction) to the specified location based on the given\n\t * {@link module:engine/model/selection~Selectable selectable} or creates an empty selection if no arguments were passed.\n\t *\n\t *\t\t// Sets selection to the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to given ranges.\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\twriter.setSelection( range );\n\t *\n\t *\t\t// Sets selection to other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\twriter.setSelection( otherSelection );\n\t *\n\t *\t\t// Sets selection to the given document selection.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\twriter.setSelection( documentSelection );\n\t *\n\t *\t\t// Sets collapsed selection at the given position.\n\t *\t\tconst position = writer.createPosition( root, path );\n\t *\t\twriter.setSelection( position );\n\t *\n\t *\t\t// Sets collapsed selection at the position of the given node and an offset.\n\t *\t\twriter.setSelection( paragraph, offset );\n\t *\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n \t * that element and ends after the last child of that element.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'in' );\n\t *\n\t * Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends just after the item.\n\t *\n\t *\t\twriter.setSelection( paragraph, 'on' );\n\t *\n\t *\t\t// Removes all selection's ranges.\n\t *\t\twriter.setSelection( null );\n\t *\n\t * `Writer#setSelection()` allow passing additional options (`backward`) as the last argument.\n\t *\n\t *\t\t// Sets selection as backward.\n\t *\t\twriter.setSelection( range, { backward: true } );\n\t *\n\t * Throws `writer-incorrect-use` error when the writer is used outside the `change()` block.\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t */\n\tsetSelection( selectable, placeOrOffset, options ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tthis.model.document.selection._setTo( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Moves {@link module:engine/model/documentselection~DocumentSelection#focus} to the specified location.\n\t *\n\t * The location can be specified in the same form as\n\t * {@link #createPositionAt `writer.createPositionAt()`} parameters.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset=0] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tsetSelectionFocus( itemOrPosition, offset ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tthis.model.document.selection._setFocus( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Sets attribute(s) on the selection. If attribute with the same key already is set, it's value is overwritten.\n\t *\n\t * Using key and value pair:\n\t *\n\t * \twriter.setSelectionAttribute( 'italic', true );\n\t *\n\t * Using key-value object:\n\t *\n\t * \twriter.setSelectionAttribute( { italic: true, bold: false } );\n\t *\n\t * Using iterable object:\n\t *\n\t * \twriter.setSelectionAttribute( new Map( [ [ 'italic', true ] ] ) );\n\t *\n\t * @param {String|Object|Iterable.<*>} keyOrObjectOrIterable Key of the attribute to set\n\t * or object / iterable of key => value attribute pairs.\n\t * @param {*} [value] Attribute value.\n\t */\n\tsetSelectionAttribute( keyOrObjectOrIterable, value ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( typeof keyOrObjectOrIterable === 'string' ) {\n\t\t\tthis._setSelectionAttribute( keyOrObjectOrIterable, value );\n\t\t} else {\n\t\t\tfor ( const [ key, value ] of toMap( keyOrObjectOrIterable ) ) {\n\t\t\t\tthis._setSelectionAttribute( key, value );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes attribute(s) with given key(s) from the selection.\n\t *\n\t * Remove one attribute:\n\t *\n\t *\t\twriter.removeSelectionAttribute( 'italic' );\n\t *\n\t * Remove multiple attributes:\n\t *\n\t *\t\twriter.removeSelectionAttribute( [ 'italic', 'bold' ] );\n\t *\n\t * @param {String|Iterable.<String>} keyOrIterableOfKeys Key of the attribute to remove or an iterable of attribute keys to remove.\n\t */\n\tremoveSelectionAttribute( keyOrIterableOfKeys ) {\n\t\tthis._assertWriterUsedCorrectly();\n\n\t\tif ( typeof keyOrIterableOfKeys === 'string' ) {\n\t\t\tthis._removeSelectionAttribute( keyOrIterableOfKeys );\n\t\t} else {\n\t\t\tfor ( const key of keyOrIterableOfKeys ) {\n\t\t\t\tthis._removeSelectionAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Temporarily changes the {@link module:engine/model/documentselection~DocumentSelection#isGravityOverridden gravity}\n\t * of the selection from left to right.\n\t *\n\t * The gravity defines from which direction the selection inherits its attributes. If it's the default left gravity,\n\t * then the selection (after being moved by the user) inherits attributes from its left-hand side.\n\t * This method allows to temporarily override this behavior by forcing the gravity to the right.\n\t *\n\t * For the following model fragment:\n\t *\n\t *\t\t<$text bold=\"true\" linkHref=\"url\">bar[]</$text><$text bold=\"true\">biz</$text>\n\t *\n\t * * Default gravity: selection will have the `bold` and `linkHref` attributes.\n\t * * Overridden gravity: selection will have `bold` attribute.\n\t *\n\t * **Note**: It returns an unique identifier which is required to restore the gravity. It guarantees the symmetry\n\t * of the process.\n\t *\n\t * @returns {String} The unique id which allows restoring the gravity.\n\t */\n\toverrideSelectionGravity() {\n\t\treturn this.model.document.selection._overrideGravity();\n\t}\n\n\t/**\n\t * Restores {@link ~Writer#overrideSelectionGravity} gravity to default.\n\t *\n\t * Restoring the gravity is only possible using the unique identifier returned by\n\t * {@link ~Writer#overrideSelectionGravity}. Note that the gravity remains overridden as long as won't be restored\n\t * the same number of times it was overridden.\n\t *\n\t * @param {String} uid The unique id returned by {@link ~Writer#overrideSelectionGravity}.\n\t */\n\trestoreSelectionGravity( uid ) {\n\t\tthis.model.document.selection._restoreGravity( uid );\n\t}\n\n\t/**\n\t * @private\n\t * @param {String} key Key of the attribute to remove.\n\t * @param {*} value Attribute value.\n\t */\n\t_setSelectionAttribute( key, value ) {\n\t\tconst selection = this.model.document.selection;\n\n\t\t// Store attribute in parent element if the selection is collapsed in an empty node.\n\t\tif ( selection.isCollapsed && selection.anchor.parent.isEmpty ) {\n\t\t\tconst storeKey = DocumentSelection._getStoreAttributeKey( key );\n\n\t\t\tthis.setAttribute( storeKey, value, selection.anchor.parent );\n\t\t}\n\n\t\tselection._setAttribute( key, value );\n\t}\n\n\t/**\n\t * @private\n\t * @param {String} key Key of the attribute to remove.\n\t */\n\t_removeSelectionAttribute( key ) {\n\t\tconst selection = this.model.document.selection;\n\n\t\t// Remove stored attribute from parent element if the selection is collapsed in an empty node.\n\t\tif ( selection.isCollapsed && selection.anchor.parent.isEmpty ) {\n\t\t\tconst storeKey = DocumentSelection._getStoreAttributeKey( key );\n\n\t\t\tthis.removeAttribute( storeKey, selection.anchor.parent );\n\t\t}\n\n\t\tselection._removeAttribute( key );\n\t}\n\n\t/**\n\t * Throws `writer-detached-writer-tries-to-modify-model` error when the writer is used outside of the `change()` block.\n\t *\n\t * @private\n\t */\n\t_assertWriterUsedCorrectly() {\n\t\t/**\n\t\t * Trying to use a writer outside a {@link module:engine/model/model~Model#change `change()`} or\n\t\t * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()`} blocks.\n\t\t *\n\t\t * The writer can only be used inside these blocks which ensures that the model\n\t\t * can only be changed during such \"sessions\".\n\t\t *\n\t\t * @error writer-incorrect-use\n\t\t */\n\t\tif ( this.model._currentWriter !== this ) {\n\t\t\tthrow new CKEditorError( 'writer-incorrect-use: Trying to use a writer outside the change() block.', this );\n\t\t}\n\t}\n\n\t/**\n\t * For given action `type` and `positionOrRange` where the action happens, this function finds all affected markers\n\t * and applies a marker operation with the new marker range equal to the current range. Thanks to this, the marker range\n\t * can be later correctly processed during undo.\n\t *\n\t * @private\n\t * @param {'move'|'merge'} type Writer action type.\n\t * @param {module:engine/model/position~Position|module:engine/model/range~Range} positionOrRange Position or range\n\t * where the writer action happens.\n\t */\n\t_addOperationForAffectedMarkers( type, positionOrRange ) {\n\t\tfor ( const marker of this.model.markers ) {\n\t\t\tif ( !marker.managedUsingOperations ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst markerRange = marker.getRange();\n\t\t\tlet isAffected = false;\n\n\t\t\tif ( type == 'move' ) {\n\t\t\t\tisAffected =\n\t\t\t\t\tpositionOrRange.containsPosition( markerRange.start ) ||\n\t\t\t\t\tpositionOrRange.start.isEqual( markerRange.start ) ||\n\t\t\t\t\tpositionOrRange.containsPosition( markerRange.end ) ||\n\t\t\t\t\tpositionOrRange.end.isEqual( markerRange.end );\n\t\t\t} else {\n\t\t\t\t// if type == 'merge'.\n\t\t\t\tconst elementBefore = positionOrRange.nodeBefore;\n\t\t\t\tconst elementAfter = positionOrRange.nodeAfter;\n\n\t\t\t\t// Start: <p>Foo[</p><p>Bar]</p>\n\t\t\t\t// After merge: <p>Foo[Bar]</p>\n\t\t\t\t// After undoing split: <p>Foo</p><p>[Bar]</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedInLeftElement = markerRange.start.parent == elementBefore && markerRange.start.isAtEnd;\n\n\t\t\t\t// Start: <p>[Foo</p><p>]Bar</p>\n\t\t\t\t// After merge: <p>[Foo]Bar</p>\n\t\t\t\t// After undoing split: <p>[Foo]</p><p>Bar</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedInRightElement = markerRange.end.parent == elementAfter && markerRange.end.offset == 0;\n\n\t\t\t\t// Start: <p>[Foo</p>]<p>Bar</p>\n\t\t\t\t// After merge: <p>[Foo]Bar</p>\n\t\t\t\t// After undoing split: <p>[Foo]</p><p>Bar</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedAfterLeftElement = markerRange.end.nodeAfter == elementAfter;\n\n\t\t\t\t// Start: <p>Foo</p>[<p>Bar]</p>\n\t\t\t\t// After merge: <p>Foo[Bar]</p>\n\t\t\t\t// After undoing split: <p>Foo</p><p>[Bar]</p> <-- incorrect, needs remembering for undo.\n\t\t\t\t//\n\t\t\t\tconst affectedBeforeRightElement = markerRange.start.nodeAfter == elementAfter;\n\n\t\t\t\tisAffected = affectedInLeftElement || affectedInRightElement || affectedAfterLeftElement || affectedBeforeRightElement;\n\t\t\t}\n\n\t\t\tif ( isAffected ) {\n\t\t\t\tthis.updateMarker( marker.name, { range: markerRange } );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Sets given attribute to each node in given range. When attribute value is null then attribute will be removed.\n//\n// Because attribute operation needs to have the same attribute value on the whole range, this function splits\n// the range into smaller parts.\n//\n// Given `range` must be flat.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} key Attribute key.\n// @param {*} value Attribute new value.\n// @param {module:engine/model/range~Range} range Model range on which the attribute will be set.\nfunction setAttributeOnRange( writer, key, value, range ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\n\t// Position of the last split, the beginning of the new range.\n\tlet lastSplitPosition = range.start;\n\n\t// Currently position in the scanning range. Because we need value after the position, it is not a current\n\t// position of the iterator but the previous one (we need to iterate one more time to get the value after).\n\tlet position;\n\n\t// Value before the currently position.\n\tlet valueBefore;\n\n\t// Value after the currently position.\n\tlet valueAfter;\n\n\tfor ( const val of range.getWalker( { shallow: true } ) ) {\n\t\tvalueAfter = val.item.getAttribute( key );\n\n\t\t// At the first run of the iterator the position in undefined. We also do not have a valueBefore, but\n\t\t// because valueAfter may be null, valueBefore may be equal valueAfter ( undefined == null ).\n\t\tif ( position && valueBefore != valueAfter ) {\n\t\t\t// if valueBefore == value there is nothing to change, so we add operation only if these values are different.\n\t\t\tif ( valueBefore != value ) {\n\t\t\t\taddOperation();\n\t\t\t}\n\n\t\t\tlastSplitPosition = position;\n\t\t}\n\n\t\tposition = val.nextPosition;\n\t\tvalueBefore = valueAfter;\n\t}\n\n\t// Because position in the loop is not the iterator position (see let position comment), the last position in\n\t// the while loop will be last but one position in the range. We need to check the last position manually.\n\tif ( position instanceof Position && position != lastSplitPosition && valueBefore != value ) {\n\t\taddOperation();\n\t}\n\n\tfunction addOperation() {\n\t\tconst range = new Range( lastSplitPosition, position );\n\t\tconst version = range.root.document ? doc.version : null;\n\t\tconst operation = new AttributeOperation( range, key, valueBefore, value, version );\n\n\t\twriter.batch.addOperation( operation );\n\t\tmodel.applyOperation( operation );\n\t}\n}\n\n// Sets given attribute to the given node. When attribute value is null then attribute will be removed.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} key Attribute key.\n// @param {*} value Attribute new value.\n// @param {module:engine/model/item~Item} item Model item on which the attribute will be set.\nfunction setAttributeOnItem( writer, key, value, item ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\tconst previousValue = item.getAttribute( key );\n\tlet range, operation;\n\n\tif ( previousValue != value ) {\n\t\tconst isRootChanged = item.root === item;\n\n\t\tif ( isRootChanged ) {\n\t\t\t// If we change attributes of root element, we have to use `RootAttributeOperation`.\n\t\t\tconst version = item.document ? doc.version : null;\n\n\t\t\toperation = new RootAttributeOperation( item, key, previousValue, value, version );\n\t\t} else {\n\t\t\trange = new Range( Position._createBefore( item ), writer.createPositionAfter( item ) );\n\n\t\t\tconst version = range.root.document ? doc.version : null;\n\n\t\t\toperation = new AttributeOperation( range, key, previousValue, value, version );\n\t\t}\n\n\t\twriter.batch.addOperation( operation );\n\t\tmodel.applyOperation( operation );\n\t}\n}\n\n// Creates and applies marker operation to {@link module:engine/model/operation/operation~Operation operation}.\n//\n// @private\n// @param {module:engine/model/writer~Writer} writer\n// @param {String} name Marker name.\n// @param {module:engine/model/range~Range} oldRange Marker range before the change.\n// @param {module:engine/model/range~Range} newRange Marker range after the change.\n// @param {Boolean} affectsData\nfunction applyMarkerOperation( writer, name, oldRange, newRange, affectsData ) {\n\tconst model = writer.model;\n\tconst doc = model.document;\n\n\tconst operation = new MarkerOperation( name, oldRange, newRange, model.markers, affectsData, doc.version );\n\n\twriter.batch.addOperation( operation );\n\tmodel.applyOperation( operation );\n}\n\n// Creates `MoveOperation` or `DetachOperation` that removes `howMany` nodes starting from `position`.\n// The operation will be applied on given model instance and added to given operation instance.\n//\n// @private\n// @param {module:engine/model/position~Position} position Position from which nodes are removed.\n// @param {Number} howMany Number of nodes to remove.\n// @param {Batch} batch Batch to which the operation will be added.\n// @param {module:engine/model/model~Model} model Model instance on which operation will be applied.\nfunction applyRemoveOperation( position, howMany, batch, model ) {\n\tlet operation;\n\n\tif ( position.root.document ) {\n\t\tconst doc = model.document;\n\t\tconst graveyardPosition = new Position( doc.graveyard, [ 0 ] );\n\n\t\toperation = new MoveOperation( position, howMany, graveyardPosition, doc.version );\n\t} else {\n\t\toperation = new DetachOperation( position, howMany );\n\t}\n\n\tbatch.addOperation( operation );\n\tmodel.applyOperation( operation );\n}\n\n// Returns `true` if both root elements are the same element or both are documents root elements.\n//\n// Elements in the same tree can be moved (for instance you can move element form one documents root to another, or\n// within the same document fragment), but when element supposed to be moved from document fragment to the document, or\n// to another document it should be removed and inserted to avoid problems with OT. This is because features like undo or\n// collaboration may track changes on the document but ignore changes on detached fragments and should not get\n// unexpected `move` operation.\nfunction isSameTree( rootA, rootB ) {\n\t// If it is the same root this is the same tree.\n\tif ( rootA === rootB ) {\n\t\treturn true;\n\t}\n\n\t// If both roots are documents root it is operation within the document what we still treat as the same tree.\n\tif ( rootA instanceof RootElement && rootB instanceof RootElement ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/differ\n */\n\nimport Position from './position';\nimport Range from './range';\n\n/**\n * Calculates the difference between two model states.\n *\n * Receives operations that are to be applied on the model document. Marks parts of the model document tree which\n * are changed and saves the state of these elements before the change. Then, it compares saved elements with the\n * changed elements, after all changes are applied on the model document. Calculates the diff between saved\n * elements and new ones and returns a change set.\n */\nexport default class Differ {\n\t/**\n\t * Creates a `Differ` instance.\n\t *\n\t * @param {module:engine/model/markercollection~MarkerCollection} markerCollection Model's marker collection.\n\t */\n\tconstructor( markerCollection ) {\n\t\t/**\n\t\t * Reference to the model's marker collection.\n\t\t *\n\t\t * @private\n\t\t * @type {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis._markerCollection = markerCollection;\n\n\t\t/**\n\t\t * A map that stores changes that happened in a given element.\n\t\t *\n\t\t * The keys of the map are references to the model elements.\n\t\t * The values of the map are arrays with changes that were done on this element.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._changesInElement = new Map();\n\n\t\t/**\n\t\t * A map that stores \"element's children snapshots\". A snapshot is representing children of a given element before\n\t\t * the first change was applied on that element. Snapshot items are objects with two properties: `name`,\n\t\t * containing the element name (or `'$text'` for a text node) and `attributes` which is a map of the node's attributes.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._elementSnapshots = new Map();\n\n\t\t/**\n\t\t * A map that stores all changed markers.\n\t\t *\n\t\t * The keys of the map are marker names.\n\t\t * The values of the map are objects with the `oldRange` and `newRange` properties. They store the marker range\n\t\t * state before and after the change.\n\t\t *\n\t\t * @private\n\t\t * @type {Map}\n\t\t */\n\t\tthis._changedMarkers = new Map();\n\n\t\t/**\n\t\t * Stores the number of changes that were processed. Used to order the changes chronologically. It is important\n\t\t * when changes are sorted.\n\t\t *\n\t\t * @private\n\t\t * @type {Number}\n\t\t */\n\t\tthis._changeCount = 0;\n\n\t\t/**\n\t\t * For efficiency purposes, `Differ` stores the change set returned by the differ after {@link #getChanges} call.\n\t\t * Cache is reset each time a new operation is buffered. If the cache has not been reset, {@link #getChanges} will\n\t\t * return the cached value instead of calculating it again.\n\t\t *\n\t\t * This property stores those changes that did not take place in graveyard root.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Object>|null}\n\t\t */\n\t\tthis._cachedChanges = null;\n\n\t\t/**\n\t\t * For efficiency purposes, `Differ` stores the change set returned by the differ after the {@link #getChanges} call.\n\t\t * The cache is reset each time a new operation is buffered. If the cache has not been reset, {@link #getChanges} will\n\t\t * return the cached value instead of calculating it again.\n\t\t *\n\t\t * This property stores all changes evaluated by `Differ`, including those that took place in the graveyard.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Object>|null}\n\t\t */\n\t\tthis._cachedChangesWithGraveyard = null;\n\t}\n\n\t/**\n\t * Informs whether there are any changes buffered in `Differ`.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this._changesInElement.size == 0 && this._changedMarkers.size == 0;\n\t}\n\n\t/**\n\t * Marks given `item` in differ to be \"refreshed\". It means that the item will be marked as removed and inserted in the differ changes\n\t * set, so it will be effectively re-converted when differ changes will be handled by a dispatcher.\n\t *\n\t * @param {module:engine/model/item~Item} item Item to refresh.\n\t */\n\trefreshItem( item ) {\n\t\tif ( this._isInInsertedElement( item.parent ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._markRemove( item.parent, item.startOffset, item.offsetSize );\n\t\tthis._markInsert( item.parent, item.startOffset, item.offsetSize );\n\n\t\tconst range = Range._createOn( item );\n\n\t\tfor ( const marker of this._markerCollection.getMarkersIntersectingRange( range ) ) {\n\t\t\tconst markerRange = marker.getRange();\n\n\t\t\tthis.bufferMarkerChange( marker.name, markerRange, markerRange, marker.affectsData );\n\t\t}\n\n\t\t// Clear cache after each buffered operation as it is no longer valid.\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Buffers the given operation. An operation has to be buffered before it is executed.\n\t *\n\t * Operation type is checked and it is checked which nodes it will affect. These nodes are then stored in `Differ`\n\t * in the state before the operation is executed.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation An operation to buffer.\n\t */\n\tbufferOperation( operation ) {\n\t\t// Below we take an operation, check its type, then use its parameters in marking (private) methods.\n\t\t// The general rule is to not mark elements inside inserted element. All inserted elements are re-rendered.\n\t\t// Marking changes in them would cause a \"double\" changing then.\n\t\t//\n\t\tswitch ( operation.type ) {\n\t\t\tcase 'insert': {\n\t\t\t\tif ( this._isInInsertedElement( operation.position.parent ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis._markInsert( operation.position.parent, operation.position.offset, operation.nodes.maxOffset );\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'addAttribute':\n\t\t\tcase 'removeAttribute':\n\t\t\tcase 'changeAttribute': {\n\t\t\t\tfor ( const item of operation.range.getItems( { shallow: true } ) ) {\n\t\t\t\t\tif ( this._isInInsertedElement( item.parent ) ) {\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tthis._markAttribute( item );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'remove':\n\t\t\tcase 'move':\n\t\t\tcase 'reinsert': {\n\t\t\t\t// When range is moved to the same position then not mark it as a change.\n\t\t\t\t// See: https://github.com/ckeditor/ckeditor5-engine/issues/1664.\n\t\t\t\tif (\n\t\t\t\t\toperation.sourcePosition.isEqual( operation.targetPosition ) ||\n\t\t\t\t\toperation.sourcePosition.getShiftedBy( operation.howMany ).isEqual( operation.targetPosition )\n\t\t\t\t) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst sourceParentInserted = this._isInInsertedElement( operation.sourcePosition.parent );\n\t\t\t\tconst targetParentInserted = this._isInInsertedElement( operation.targetPosition.parent );\n\n\t\t\t\tif ( !sourceParentInserted ) {\n\t\t\t\t\tthis._markRemove( operation.sourcePosition.parent, operation.sourcePosition.offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\tif ( !targetParentInserted ) {\n\t\t\t\t\tthis._markInsert( operation.targetPosition.parent, operation.getMovedRangeStart().offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'rename': {\n\t\t\t\tif ( this._isInInsertedElement( operation.position.parent ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tthis._markRemove( operation.position.parent, operation.position.offset, 1 );\n\t\t\t\tthis._markInsert( operation.position.parent, operation.position.offset, 1 );\n\n\t\t\t\tconst range = Range._createFromPositionAndShift( operation.position, 1 );\n\n\t\t\t\tfor ( const marker of this._markerCollection.getMarkersIntersectingRange( range ) ) {\n\t\t\t\t\tconst markerRange = marker.getRange();\n\n\t\t\t\t\tthis.bufferMarkerChange( marker.name, markerRange, markerRange, marker.affectsData );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'split': {\n\t\t\t\tconst splitElement = operation.splitPosition.parent;\n\n\t\t\t\t// Mark that children of the split element were removed.\n\t\t\t\tif ( !this._isInInsertedElement( splitElement ) ) {\n\t\t\t\t\tthis._markRemove( splitElement, operation.splitPosition.offset, operation.howMany );\n\t\t\t\t}\n\n\t\t\t\t// Mark that the new element (split copy) was inserted.\n\t\t\t\tif ( !this._isInInsertedElement( operation.insertionPosition.parent ) ) {\n\t\t\t\t\tthis._markInsert( operation.insertionPosition.parent, operation.insertionPosition.offset, 1 );\n\t\t\t\t}\n\n\t\t\t\t// If the split took the element from the graveyard, mark that the element from the graveyard was removed.\n\t\t\t\tif ( operation.graveyardPosition ) {\n\t\t\t\t\tthis._markRemove( operation.graveyardPosition.parent, operation.graveyardPosition.offset, 1 );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tcase 'merge': {\n\t\t\t\t// Mark that the merged element was removed.\n\t\t\t\tconst mergedElement = operation.sourcePosition.parent;\n\n\t\t\t\tif ( !this._isInInsertedElement( mergedElement.parent ) ) {\n\t\t\t\t\tthis._markRemove( mergedElement.parent, mergedElement.startOffset, 1 );\n\t\t\t\t}\n\n\t\t\t\t// Mark that the merged element was inserted into graveyard.\n\t\t\t\tconst graveyardParent = operation.graveyardPosition.parent;\n\n\t\t\t\tthis._markInsert( graveyardParent, operation.graveyardPosition.offset, 1 );\n\n\t\t\t\t// Mark that children of merged element were inserted at new parent.\n\t\t\t\tconst mergedIntoElement = operation.targetPosition.parent;\n\n\t\t\t\tif ( !this._isInInsertedElement( mergedIntoElement ) ) {\n\t\t\t\t\tthis._markInsert( mergedIntoElement, operation.targetPosition.offset, mergedElement.maxOffset );\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\t// Clear cache after each buffered operation as it is no longer valid.\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Buffers a marker change.\n\t *\n\t * @param {String} markerName The name of the marker that changed.\n\t * @param {module:engine/model/range~Range|null} oldRange Marker range before the change or `null` if the marker has just\n\t * been created.\n\t * @param {module:engine/model/range~Range|null} newRange Marker range after the change or `null` if the marker was removed.\n\t * @param {Boolean} affectsData Flag indicating whether marker affects the editor data.\n\t */\n\tbufferMarkerChange( markerName, oldRange, newRange, affectsData ) {\n\t\tconst buffered = this._changedMarkers.get( markerName );\n\n\t\tif ( !buffered ) {\n\t\t\tthis._changedMarkers.set( markerName, {\n\t\t\t\toldRange,\n\t\t\t\tnewRange,\n\t\t\t\taffectsData\n\t\t\t} );\n\t\t} else {\n\t\t\tbuffered.newRange = newRange;\n\t\t\tbuffered.affectsData = affectsData;\n\n\t\t\tif ( buffered.oldRange == null && buffered.newRange == null ) {\n\t\t\t\t// The marker is going to be removed (`newRange == null`) but it did not exist before the first buffered change\n\t\t\t\t// (`buffered.oldRange == null`). In this case, do not keep the marker in buffer at all.\n\t\t\t\tthis._changedMarkers.delete( markerName );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns all markers that should be removed as a result of buffered changes.\n\t *\n\t * @returns {Array.<Object>} Markers to remove. Each array item is an object containing the `name` and `range` properties.\n\t */\n\tgetMarkersToRemove() {\n\t\tconst result = [];\n\n\t\tfor ( const [ name, change ] of this._changedMarkers ) {\n\t\t\tif ( change.oldRange != null ) {\n\t\t\t\tresult.push( { name, range: change.oldRange } );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns all markers which should be added as a result of buffered changes.\n\t *\n\t * @returns {Array.<Object>} Markers to add. Each array item is an object containing the `name` and `range` properties.\n\t */\n\tgetMarkersToAdd() {\n\t\tconst result = [];\n\n\t\tfor ( const [ name, change ] of this._changedMarkers ) {\n\t\t\tif ( change.newRange != null ) {\n\t\t\t\tresult.push( { name, range: change.newRange } );\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Returns all markers which changed.\n\t *\n\t * @returns {Array.<Object>}\n\t */\n\tgetChangedMarkers() {\n\t\treturn Array.from( this._changedMarkers ).map( item => (\n\t\t\t{\n\t\t\t\tname: item[ 0 ],\n\t\t\t\tdata: {\n\t\t\t\t\toldRange: item[ 1 ].oldRange,\n\t\t\t\t\tnewRange: item[ 1 ].newRange\n\t\t\t\t}\n\t\t\t}\n\t\t) );\n\t}\n\n\t/**\n\t * Checks whether some of the buffered changes affect the editor data.\n\t *\n\t * Types of changes which affect the editor data:\n\t *\n\t * * model structure changes,\n\t * * attribute changes,\n\t * * changes of markers which were defined as `affectingData`.\n\t *\n\t * @returns {Boolean}\n\t */\n\thasDataChanges() {\n\t\tfor ( const [ , change ] of this._changedMarkers ) {\n\t\t\tif ( change.affectsData ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\t// If markers do not affect the data, check whether there are some changes in elements.\n\t\treturn this._changesInElement.size > 0;\n\t}\n\n\t/**\n\t * Calculates the diff between the old model tree state (the state before the first buffered operations since the last {@link #reset}\n\t * call) and the new model tree state (actual one). It should be called after all buffered operations are executed.\n\t *\n\t * The diff set is returned as an array of diff items, each describing a change done on the model. The items are sorted by\n\t * the position on which the change happened. If a position {@link module:engine/model/position~Position#isBefore is before}\n\t * another one, it will be on an earlier index in the diff set.\n\t *\n\t * Because calculating the diff is a costly operation, the result is cached. If no new operation was buffered since the\n\t * previous {@link #getChanges} call, the next call will return the cached value.\n\t *\n\t * @param {Object} options Additional options.\n\t * @param {Boolean} [options.includeChangesInGraveyard=false] If set to `true`, also changes that happened\n\t * in the graveyard root will be returned. By default, changes in the graveyard root are not returned.\n\t * @returns {Array.<Object>} Diff between the old and the new model tree state.\n\t */\n\tgetChanges( options = { includeChangesInGraveyard: false } ) {\n\t\t// If there are cached changes, just return them instead of calculating changes again.\n\t\tif ( this._cachedChanges ) {\n\t\t\tif ( options.includeChangesInGraveyard ) {\n\t\t\t\treturn this._cachedChangesWithGraveyard.slice();\n\t\t\t} else {\n\t\t\t\treturn this._cachedChanges.slice();\n\t\t\t}\n\t\t}\n\n\t\t// Will contain returned results.\n\t\tconst diffSet = [];\n\n\t\t// Check all changed elements.\n\t\tfor ( const element of this._changesInElement.keys() ) {\n\t\t\t// Get changes for this element and sort them.\n\t\t\tconst changes = this._changesInElement.get( element ).sort( ( a, b ) => {\n\t\t\t\tif ( a.offset === b.offset ) {\n\t\t\t\t\tif ( a.type != b.type ) {\n\t\t\t\t\t\t// If there are multiple changes at the same position, \"remove\" change should be first.\n\t\t\t\t\t\t// If the order is different, for example, we would first add some nodes and then removed them\n\t\t\t\t\t\t// (instead of the nodes that we should remove).\n\t\t\t\t\t\treturn a.type == 'remove' ? -1 : 1;\n\t\t\t\t\t}\n\n\t\t\t\t\treturn 0;\n\t\t\t\t}\n\n\t\t\t\treturn a.offset < b.offset ? -1 : 1;\n\t\t\t} );\n\n\t\t\t// Get children of this element before any change was applied on it.\n\t\t\tconst snapshotChildren = this._elementSnapshots.get( element );\n\t\t\t// Get snapshot of current element's children.\n\t\t\tconst elementChildren = _getChildrenSnapshot( element.getChildren() );\n\n\t\t\t// Generate actions basing on changes done on element.\n\t\t\tconst actions = _generateActionsFromChanges( snapshotChildren.length, changes );\n\n\t\t\tlet i = 0; // Iterator in `elementChildren` array -- iterates through current children of element.\n\t\t\tlet j = 0; // Iterator in `snapshotChildren` array -- iterates through old children of element.\n\n\t\t\t// Process every action.\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'i' ) {\n\t\t\t\t\t// Generate diff item for this element and insert it into the diff set.\n\t\t\t\t\tdiffSet.push( this._getInsertDiff( element, i, elementChildren[ i ].name ) );\n\n\t\t\t\t\ti++;\n\t\t\t\t} else if ( action === 'r' ) {\n\t\t\t\t\t// Generate diff item for this element and insert it into the diff set.\n\t\t\t\t\tdiffSet.push( this._getRemoveDiff( element, i, snapshotChildren[ j ].name ) );\n\n\t\t\t\t\tj++;\n\t\t\t\t} else if ( action === 'a' ) {\n\t\t\t\t\t// Take attributes from saved and current children.\n\t\t\t\t\tconst elementAttributes = elementChildren[ i ].attributes;\n\t\t\t\t\tconst snapshotAttributes = snapshotChildren[ j ].attributes;\n\t\t\t\t\tlet range;\n\n\t\t\t\t\tif ( elementChildren[ i ].name == '$text' ) {\n\t\t\t\t\t\trange = new Range( Position._createAt( element, i ), Position._createAt( element, i + 1 ) );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tconst index = element.offsetToIndex( i );\n\t\t\t\t\t\trange = new Range( Position._createAt( element, i ), Position._createAt( element.getChild( index ), 0 ) );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Generate diff items for this change (there might be multiple attributes changed and\n\t\t\t\t\t// there is a single diff for each of them) and insert them into the diff set.\n\t\t\t\t\tdiffSet.push( ...this._getAttributesDiff( range, snapshotAttributes, elementAttributes ) );\n\n\t\t\t\t\ti++;\n\t\t\t\t\tj++;\n\t\t\t\t} else {\n\t\t\t\t\t// `action` is 'equal'. Child not changed.\n\t\t\t\t\ti++;\n\t\t\t\t\tj++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Then, sort the changes by the position (change at position before other changes is first).\n\t\tdiffSet.sort( ( a, b ) => {\n\t\t\t// If the change is in different root, we don't care much, but we'd like to have all changes in given\n\t\t\t// root \"together\" in the array. So let's just sort them by the root name. It does not matter which root\n\t\t\t// will be processed first.\n\t\t\tif ( a.position.root != b.position.root ) {\n\t\t\t\treturn a.position.root.rootName < b.position.root.rootName ? -1 : 1;\n\t\t\t}\n\n\t\t\t// If change happens at the same position...\n\t\t\tif ( a.position.isEqual( b.position ) ) {\n\t\t\t\t// Keep chronological order of operations.\n\t\t\t\treturn a.changeCount - b.changeCount;\n\t\t\t}\n\n\t\t\t// If positions differ, position \"on the left\" should be earlier in the result.\n\t\t\treturn a.position.isBefore( b.position ) ? -1 : 1;\n\t\t} );\n\n\t\t// Glue together multiple changes (mostly on text nodes).\n\t\tfor ( let i = 1; i < diffSet.length; i++ ) {\n\t\t\tconst prevDiff = diffSet[ i - 1 ];\n\t\t\tconst thisDiff = diffSet[ i ];\n\n\t\t\t// Glue remove changes if they happen on text on same position.\n\t\t\tconst isConsecutiveTextRemove =\n\t\t\t\tprevDiff.type == 'remove' && thisDiff.type == 'remove' &&\n\t\t\t\tprevDiff.name == '$text' && thisDiff.name == '$text' &&\n\t\t\t\tprevDiff.position.isEqual( thisDiff.position );\n\n\t\t\t// Glue insert changes if they happen on text on consecutive fragments.\n\t\t\tconst isConsecutiveTextAdd =\n\t\t\t\tprevDiff.type == 'insert' && thisDiff.type == 'insert' &&\n\t\t\t\tprevDiff.name == '$text' && thisDiff.name == '$text' &&\n\t\t\t\tprevDiff.position.parent == thisDiff.position.parent &&\n\t\t\t\tprevDiff.position.offset + prevDiff.length == thisDiff.position.offset;\n\n\t\t\t// Glue attribute changes if they happen on consecutive fragments and have same key, old value and new value.\n\t\t\tconst isConsecutiveAttributeChange =\n\t\t\t\tprevDiff.type == 'attribute' && thisDiff.type == 'attribute' &&\n\t\t\t\tprevDiff.position.parent == thisDiff.position.parent &&\n\t\t\t\tprevDiff.range.isFlat && thisDiff.range.isFlat &&\n\t\t\t\tprevDiff.position.offset + prevDiff.length == thisDiff.position.offset &&\n\t\t\t\tprevDiff.attributeKey == thisDiff.attributeKey &&\n\t\t\t\tprevDiff.attributeOldValue == thisDiff.attributeOldValue &&\n\t\t\t\tprevDiff.attributeNewValue == thisDiff.attributeNewValue;\n\n\t\t\tif ( isConsecutiveTextRemove || isConsecutiveTextAdd || isConsecutiveAttributeChange ) {\n\t\t\t\tdiffSet[ i - 1 ].length++;\n\n\t\t\t\tif ( isConsecutiveAttributeChange ) {\n\t\t\t\t\tdiffSet[ i - 1 ].range.end = diffSet[ i - 1 ].range.end.getShiftedBy( 1 );\n\t\t\t\t}\n\n\t\t\t\tdiffSet.splice( i, 1 );\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\n\t\t// Remove `changeCount` property from diff items. It is used only for sorting and is internal thing.\n\t\tfor ( const item of diffSet ) {\n\t\t\tdelete item.changeCount;\n\n\t\t\tif ( item.type == 'attribute' ) {\n\t\t\t\tdelete item.position;\n\t\t\t\tdelete item.length;\n\t\t\t}\n\t\t}\n\n\t\tthis._changeCount = 0;\n\n\t\t// Cache changes.\n\t\tthis._cachedChangesWithGraveyard = diffSet.slice();\n\t\tthis._cachedChanges = diffSet.slice().filter( _changesInGraveyardFilter );\n\n\t\tif ( options.includeChangesInGraveyard ) {\n\t\t\treturn this._cachedChangesWithGraveyard;\n\t\t} else {\n\t\t\treturn this._cachedChanges;\n\t\t}\n\t}\n\n\t/**\n\t * Resets `Differ`. Removes all buffered changes.\n\t */\n\treset() {\n\t\tthis._changesInElement.clear();\n\t\tthis._elementSnapshots.clear();\n\t\tthis._changedMarkers.clear();\n\t\tthis._cachedChanges = null;\n\t}\n\n\t/**\n\t * Saves and handles an insert change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_markInsert( parent, offset, howMany ) {\n\t\tconst changeItem = { type: 'insert', offset, howMany, count: this._changeCount++ };\n\n\t\tthis._markChange( parent, changeItem );\n\t}\n\n\t/**\n\t * Saves and handles a remove change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_markRemove( parent, offset, howMany ) {\n\t\tconst changeItem = { type: 'remove', offset, howMany, count: this._changeCount++ };\n\n\t\tthis._markChange( parent, changeItem );\n\n\t\tthis._removeAllNestedChanges( parent, offset, howMany );\n\t}\n\n\t/**\n\t * Saves and handles an attribute change.\n\t *\n\t * @private\n\t * @param {module:engine/model/item~Item} item\n\t */\n\t_markAttribute( item ) {\n\t\tconst changeItem = { type: 'attribute', offset: item.startOffset, howMany: item.offsetSize, count: this._changeCount++ };\n\n\t\tthis._markChange( item.parent, changeItem );\n\t}\n\n\t/**\n\t * Saves and handles a model change.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Object} changeItem\n\t */\n\t_markChange( parent, changeItem ) {\n\t\t// First, make a snapshot of this parent's children (it will be made only if it was not made before).\n\t\tthis._makeSnapshot( parent );\n\n\t\t// Then, get all changes that already were done on the element (empty array if this is the first change).\n\t\tconst changes = this._getChangesForElement( parent );\n\n\t\t// Then, look through all the changes, and transform them or the new change.\n\t\tthis._handleChange( changeItem, changes );\n\n\t\t// Add the new change.\n\t\tchanges.push( changeItem );\n\n\t\t// Remove incorrect changes. During transformation some change might be, for example, included in another.\n\t\t// In that case, the change will have `howMany` property set to `0` or less. We need to remove those changes.\n\t\tfor ( let i = 0; i < changes.length; i++ ) {\n\t\t\tif ( changes[ i ].howMany < 1 ) {\n\t\t\t\tchanges.splice( i, 1 );\n\n\t\t\t\ti--;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Gets an array of changes that have already been saved for a given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t * @returns {Array.<Object>}\n\t */\n\t_getChangesForElement( element ) {\n\t\tlet changes;\n\n\t\tif ( this._changesInElement.has( element ) ) {\n\t\t\tchanges = this._changesInElement.get( element );\n\t\t} else {\n\t\t\tchanges = [];\n\n\t\t\tthis._changesInElement.set( element, changes );\n\t\t}\n\n\t\treturn changes;\n\t}\n\n\t/**\n\t * Saves a children snapshot for a given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t */\n\t_makeSnapshot( element ) {\n\t\tif ( !this._elementSnapshots.has( element ) ) {\n\t\t\tthis._elementSnapshots.set( element, _getChildrenSnapshot( element.getChildren() ) );\n\t\t}\n\t}\n\n\t/**\n\t * For a given newly saved change, compares it with a change already done on the element and modifies the incoming\n\t * change and/or the old change.\n\t *\n\t * @private\n\t * @param {Object} inc Incoming (new) change.\n\t * @param {Array.<Object>} changes An array containing all the changes done on that element.\n\t */\n\t_handleChange( inc, changes ) {\n\t\t// We need a helper variable that will store how many nodes are to be still handled for this change item.\n\t\t// `nodesToHandle` (how many nodes still need to be handled) and `howMany` (how many nodes were affected)\n\t\t// needs to be differentiated.\n\t\t//\n\t\t// This comes up when there are multiple changes that are affected by `inc` change item.\n\t\t//\n\t\t// For example: assume two insert changes: `{ offset: 2, howMany: 1 }` and `{ offset: 5, howMany: 1 }`.\n\t\t// Assume that `inc` change is remove `{ offset: 2, howMany: 2, nodesToHandle: 2 }`.\n\t\t//\n\t\t// Then, we:\n\t\t// - \"forget\" about first insert change (it is \"eaten\" by remove),\n\t\t// - because of that, at the end we will want to remove only one node (`nodesToHandle = 1`),\n\t\t// - but still we have to change offset of the second insert change from `5` to `3`!\n\t\t//\n\t\t// So, `howMany` does not change throughout items transformation and keeps information about how many nodes were affected,\n\t\t// while `nodesToHandle` means how many nodes need to be handled after the change item is transformed by other changes.\n\t\tinc.nodesToHandle = inc.howMany;\n\n\t\tfor ( const old of changes ) {\n\t\t\tconst incEnd = inc.offset + inc.howMany;\n\t\t\tconst oldEnd = old.offset + old.howMany;\n\n\t\t\tif ( inc.type == 'insert' ) {\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\told.howMany += inc.nodesToHandle;\n\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\tif ( inc.offset < old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\told.offset += inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\t// This case is more complicated, because attribute change has to be split into two.\n\t\t\t\t\t\t// Example (assume that uppercase and lowercase letters mean different attributes):\n\t\t\t\t\t\t//\n\t\t\t\t\t\t// initial state:\t\tabcxyz\n\t\t\t\t\t\t// attribute change:\taBCXYz\n\t\t\t\t\t\t// incoming insert:\t\taBCfooXYz\n\t\t\t\t\t\t//\n\t\t\t\t\t\t// Change ranges cannot intersect because each item has to be described exactly (it was either\n\t\t\t\t\t\t// not changed, inserted, removed, or its attribute was changed). That's why old attribute\n\t\t\t\t\t\t// change has to be split and both parts has to be handled separately from now on.\n\t\t\t\t\t\tconst howMany = old.howMany;\n\n\t\t\t\t\t\told.howMany = inc.offset - old.offset;\n\n\t\t\t\t\t\t// Add the second part of attribute change to the beginning of processed array so it won't\n\t\t\t\t\t\t// be processed again in this loop.\n\t\t\t\t\t\tchanges.unshift( {\n\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\toffset: incEnd,\n\t\t\t\t\t\t\thowMany: howMany - old.howMany,\n\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t} );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( inc.type == 'remove' ) {\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( incEnd <= oldEnd ) {\n\t\t\t\t\t\tif ( inc.offset < old.offset ) {\n\t\t\t\t\t\t\tconst intersectionLength = incEnd - old.offset;\n\n\t\t\t\t\t\t\told.offset = inc.offset;\n\n\t\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t\t\tinc.nodesToHandle -= intersectionLength;\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\told.howMany -= inc.nodesToHandle;\n\t\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t} else {\n\t\t\t\t\t\tif ( inc.offset <= old.offset ) {\n\t\t\t\t\t\t\tinc.nodesToHandle -= old.howMany;\n\t\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\t\tconst intersectionLength = oldEnd - inc.offset;\n\n\t\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t\t\tinc.nodesToHandle -= intersectionLength;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < old.offset ) {\n\t\t\t\t\t\tinc.nodesToHandle += old.howMany;\n\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\tif ( incEnd <= old.offset ) {\n\t\t\t\t\t\told.offset -= inc.howMany;\n\t\t\t\t\t} else if ( inc.offset < old.offset ) {\n\t\t\t\t\t\tconst intersectionLength = incEnd - old.offset;\n\n\t\t\t\t\t\told.offset = inc.offset;\n\t\t\t\t\t\told.howMany -= intersectionLength;\n\t\t\t\t\t} else if ( inc.offset < oldEnd ) {\n\t\t\t\t\t\tif ( incEnd <= oldEnd ) {\n\t\t\t\t\t\t\t// On first sight in this case we don't need to split attribute operation into two.\n\t\t\t\t\t\t\t// However the changes set is later converted to actions (see `_generateActionsFromChanges`).\n\t\t\t\t\t\t\t// For that reason, no two changes may intersect.\n\t\t\t\t\t\t\t// So we cannot have an attribute change that \"contains\" remove change.\n\t\t\t\t\t\t\t// Attribute change needs to be split.\n\t\t\t\t\t\t\tconst howMany = old.howMany;\n\n\t\t\t\t\t\t\told.howMany = inc.offset - old.offset;\n\n\t\t\t\t\t\t\tconst howManyAfter = howMany - old.howMany - inc.nodesToHandle;\n\n\t\t\t\t\t\t\t// Add the second part of attribute change to the beginning of processed array so it won't\n\t\t\t\t\t\t\t// be processed again in this loop.\n\t\t\t\t\t\t\tchanges.unshift( {\n\t\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\t\toffset: inc.offset,\n\t\t\t\t\t\t\t\thowMany: howManyAfter,\n\t\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\told.howMany -= oldEnd - inc.offset;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( inc.type == 'attribute' ) {\n\t\t\t\t// In case of attribute change, `howMany` should be kept same as `nodesToHandle`. It's not an error.\n\t\t\t\tif ( old.type == 'insert' ) {\n\t\t\t\t\tif ( inc.offset < old.offset && incEnd > old.offset ) {\n\t\t\t\t\t\tif ( incEnd > oldEnd ) {\n\t\t\t\t\t\t\t// This case is similar to a case described when incoming change was insert and old change was attribute.\n\t\t\t\t\t\t\t// See comment above.\n\t\t\t\t\t\t\t//\n\t\t\t\t\t\t\t// This time incoming change is attribute. We need to split incoming change in this case too.\n\t\t\t\t\t\t\t// However this time, the second part of the attribute change needs to be processed further\n\t\t\t\t\t\t\t// because there might be other changes that it collides with.\n\t\t\t\t\t\t\tconst attributePart = {\n\t\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\t\toffset: oldEnd,\n\t\t\t\t\t\t\t\thowMany: incEnd - oldEnd,\n\t\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t\t};\n\n\t\t\t\t\t\t\tthis._handleChange( attributePart, changes );\n\n\t\t\t\t\t\t\tchanges.push( attributePart );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tinc.nodesToHandle = old.offset - inc.offset;\n\t\t\t\t\t\tinc.howMany = inc.nodesToHandle;\n\t\t\t\t\t} else if ( inc.offset >= old.offset && inc.offset < oldEnd ) {\n\t\t\t\t\t\tif ( incEnd > oldEnd ) {\n\t\t\t\t\t\t\tinc.nodesToHandle = incEnd - oldEnd;\n\t\t\t\t\t\t\tinc.offset = oldEnd;\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'remove' ) {\n\t\t\t\t\t// This is a case when attribute change \"contains\" remove change.\n\t\t\t\t\t// The attribute change needs to be split into two because changes cannot intersect.\n\t\t\t\t\tif ( inc.offset < old.offset && incEnd > old.offset ) {\n\t\t\t\t\t\tconst attributePart = {\n\t\t\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\t\t\toffset: old.offset,\n\t\t\t\t\t\t\thowMany: incEnd - old.offset,\n\t\t\t\t\t\t\tcount: this._changeCount++\n\t\t\t\t\t\t};\n\n\t\t\t\t\t\tthis._handleChange( attributePart, changes );\n\n\t\t\t\t\t\tchanges.push( attributePart );\n\n\t\t\t\t\t\tinc.nodesToHandle = old.offset - inc.offset;\n\t\t\t\t\t\tinc.howMany = inc.nodesToHandle;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif ( old.type == 'attribute' ) {\n\t\t\t\t\t// There are only two conflicting scenarios possible here:\n\t\t\t\t\tif ( inc.offset >= old.offset && incEnd <= oldEnd ) {\n\t\t\t\t\t\t// `old` change includes `inc` change, or they are the same.\n\t\t\t\t\t\tinc.nodesToHandle = 0;\n\t\t\t\t\t\tinc.howMany = 0;\n\t\t\t\t\t\tinc.offset = 0;\n\t\t\t\t\t} else if ( inc.offset <= old.offset && incEnd >= oldEnd ) {\n\t\t\t\t\t\t// `inc` change includes `old` change.\n\t\t\t\t\t\told.howMany = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tinc.howMany = inc.nodesToHandle;\n\t\tdelete inc.nodesToHandle;\n\t}\n\n\t/**\n\t * Returns an object with a single insert change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent The element in which the change happened.\n\t * @param {Number} offset The offset at which change happened.\n\t * @param {String} name The name of the removed element or `'$text'` for a character.\n\t * @returns {Object} The diff item.\n\t */\n\t_getInsertDiff( parent, offset, name ) {\n\t\treturn {\n\t\t\ttype: 'insert',\n\t\t\tposition: Position._createAt( parent, offset ),\n\t\t\tname,\n\t\t\tlength: 1,\n\t\t\tchangeCount: this._changeCount++\n\t\t};\n\t}\n\n\t/**\n\t * Returns an object with a single remove change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent The element in which change happened.\n\t * @param {Number} offset The offset at which change happened.\n\t * @param {String} name The name of the removed element or `'$text'` for a character.\n\t * @returns {Object} The diff item.\n\t */\n\t_getRemoveDiff( parent, offset, name ) {\n\t\treturn {\n\t\t\ttype: 'remove',\n\t\t\tposition: Position._createAt( parent, offset ),\n\t\t\tname,\n\t\t\tlength: 1,\n\t\t\tchangeCount: this._changeCount++\n\t\t};\n\t}\n\n\t/**\n\t * Returns an array of objects where each one is a single attribute change description.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range The range where the change happened.\n\t * @param {Map} oldAttributes A map, map iterator or compatible object that contains attributes before the change.\n\t * @param {Map} newAttributes A map, map iterator or compatible object that contains attributes after the change.\n\t * @returns {Array.<Object>} An array containing one or more diff items.\n\t */\n\t_getAttributesDiff( range, oldAttributes, newAttributes ) {\n\t\t// Results holder.\n\t\tconst diffs = [];\n\n\t\t// Clone new attributes as we will be performing changes on this object.\n\t\tnewAttributes = new Map( newAttributes );\n\n\t\t// Look through old attributes.\n\t\tfor ( const [ key, oldValue ] of oldAttributes ) {\n\t\t\t// Check what is the new value of the attribute (or if it was removed).\n\t\t\tconst newValue = newAttributes.has( key ) ? newAttributes.get( key ) : null;\n\n\t\t\t// If values are different (or attribute was removed)...\n\t\t\tif ( newValue !== oldValue ) {\n\t\t\t\t// Add diff item.\n\t\t\t\tdiffs.push( {\n\t\t\t\t\ttype: 'attribute',\n\t\t\t\t\tposition: range.start,\n\t\t\t\t\trange: range.clone(),\n\t\t\t\t\tlength: 1,\n\t\t\t\t\tattributeKey: key,\n\t\t\t\t\tattributeOldValue: oldValue,\n\t\t\t\t\tattributeNewValue: newValue,\n\t\t\t\t\tchangeCount: this._changeCount++\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Prevent returning two diff items for the same change.\n\t\t\tnewAttributes.delete( key );\n\t\t}\n\n\t\t// Look through new attributes that weren't handled above.\n\t\tfor ( const [ key, newValue ] of newAttributes ) {\n\t\t\t// Each of them is a new attribute. Add diff item.\n\t\t\tdiffs.push( {\n\t\t\t\ttype: 'attribute',\n\t\t\t\tposition: range.start,\n\t\t\t\trange: range.clone(),\n\t\t\t\tlength: 1,\n\t\t\t\tattributeKey: key,\n\t\t\t\tattributeOldValue: null,\n\t\t\t\tattributeNewValue: newValue,\n\t\t\t\tchangeCount: this._changeCount++\n\t\t\t} );\n\t\t}\n\n\t\treturn diffs;\n\t}\n\n\t/**\n\t * Checks whether given element or any of its parents is an element that is buffered as an inserted element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element Element to check.\n\t * @returns {Boolean}\n\t */\n\t_isInInsertedElement( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( !parent ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst changes = this._changesInElement.get( parent );\n\t\tconst offset = element.startOffset;\n\n\t\tif ( changes ) {\n\t\t\tfor ( const change of changes ) {\n\t\t\t\tif ( change.type == 'insert' && offset >= change.offset && offset < change.offset + change.howMany ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this._isInInsertedElement( parent );\n\t}\n\n\t/**\n\t * Removes deeply all buffered changes that are registered in elements from range specified by `parent`, `offset`\n\t * and `howMany`.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} parent\n\t * @param {Number} offset\n\t * @param {Number} howMany\n\t */\n\t_removeAllNestedChanges( parent, offset, howMany ) {\n\t\tconst range = new Range( Position._createAt( parent, offset ), Position._createAt( parent, offset + howMany ) );\n\n\t\tfor ( const item of range.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'element' ) ) {\n\t\t\t\tthis._elementSnapshots.delete( item );\n\t\t\t\tthis._changesInElement.delete( item );\n\n\t\t\t\tthis._removeAllNestedChanges( item, 0, item.maxOffset );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Returns an array that is a copy of passed child list with the exception that text nodes are split to one or more\n// objects, each representing one character and attributes set on that character.\nfunction _getChildrenSnapshot( children ) {\n\tconst snapshot = [];\n\n\tfor ( const child of children ) {\n\t\tif ( child.is( 'text' ) ) {\n\t\t\tfor ( let i = 0; i < child.data.length; i++ ) {\n\t\t\t\tsnapshot.push( {\n\t\t\t\t\tname: '$text',\n\t\t\t\t\tattributes: new Map( child.getAttributes() )\n\t\t\t\t} );\n\t\t\t}\n\t\t} else {\n\t\t\tsnapshot.push( {\n\t\t\t\tname: child.name,\n\t\t\t\tattributes: new Map( child.getAttributes() )\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn snapshot;\n}\n\n// Generates array of actions for given changes set.\n// It simulates what `diff` function does.\n// Generated actions are:\n// - 'e' for 'equal' - when item at that position did not change,\n// - 'i' for 'insert' - when item at that position was inserted,\n// - 'r' for 'remove' - when item at that position was removed,\n// - 'a' for 'attribute' - when item at that position has it attributes changed.\n//\n// Example (assume that uppercase letters have bold attribute, compare with function code):\n//\n// children before:\tfooBAR\n// children after:\tfoxybAR\n//\n// changes: type: remove, offset: 1, howMany: 1\n//\t\t\ttype: insert, offset: 2, howMany: 2\n//\t\t\ttype: attribute, offset: 4, howMany: 1\n//\n// expected actions: equal (f), remove (o), equal (o), insert (x), insert (y), attribute (b), equal (A), equal (R)\n//\n// steps taken by th script:\n//\n// 1. change = \"type: remove, offset: 1, howMany: 1\"; offset = 0; oldChildrenHandled = 0\n// 1.1 between this change and the beginning is one not-changed node, fill with one equal action, one old child has been handled\n// 1.2 this change removes one node, add one remove action\n// 1.3 change last visited `offset` to 1\n// 1.4 since an old child has been removed, one more old child has been handled\n// 1.5 actions at this point are: equal, remove\n//\n// 2. change = \"type: insert, offset: 2, howMany: 2\"; offset = 1; oldChildrenHandled = 2\n// 2.1 between this change and previous change is one not-changed node, add equal action, another one old children has been handled\n// 2.2 this change inserts two nodes, add two insert actions\n// 2.3 change last visited offset to the end of the inserted range, that is 4\n// 2.4 actions at this point are: equal, remove, equal, insert, insert\n//\n// 3. change = \"type: attribute, offset: 4, howMany: 1\"; offset = 4, oldChildrenHandled = 3\n// 3.1 between this change and previous change are no not-changed nodes\n// 3.2 this change changes one node, add one attribute action\n// 3.3 change last visited `offset` to the end of change range, that is 5\n// 3.4 since an old child has been changed, one more old child has been handled\n// 3.5 actions at this point are: equal, remove, equal, insert, insert, attribute\n//\n// 4. after loop oldChildrenHandled = 4, oldChildrenLength = 6 (fooBAR is 6 characters)\n// 4.1 fill up with two equal actions\n//\n// The result actions are: equal, remove, equal, insert, insert, attribute, equal, equal.\nfunction _generateActionsFromChanges( oldChildrenLength, changes ) {\n\tconst actions = [];\n\n\tlet offset = 0;\n\tlet oldChildrenHandled = 0;\n\n\t// Go through all buffered changes.\n\tfor ( const change of changes ) {\n\t\t// First, fill \"holes\" between changes with \"equal\" actions.\n\t\tif ( change.offset > offset ) {\n\t\t\tfor ( let i = 0; i < change.offset - offset; i++ ) {\n\t\t\t\tactions.push( 'e' );\n\t\t\t}\n\n\t\t\toldChildrenHandled += change.offset - offset;\n\t\t}\n\n\t\t// Then, fill up actions accordingly to change type.\n\t\tif ( change.type == 'insert' ) {\n\t\t\tfor ( let i = 0; i < change.howMany; i++ ) {\n\t\t\t\tactions.push( 'i' );\n\t\t\t}\n\n\t\t\t// The last handled offset is after inserted range.\n\t\t\toffset = change.offset + change.howMany;\n\t\t} else if ( change.type == 'remove' ) {\n\t\t\tfor ( let i = 0; i < change.howMany; i++ ) {\n\t\t\t\tactions.push( 'r' );\n\t\t\t}\n\n\t\t\t// The last handled offset is at the position where the nodes were removed.\n\t\t\toffset = change.offset;\n\t\t\t// We removed `howMany` old nodes, update `oldChildrenHandled`.\n\t\t\toldChildrenHandled += change.howMany;\n\t\t} else {\n\t\t\tactions.push( ...'a'.repeat( change.howMany ).split( '' ) );\n\n\t\t\t// The last handled offset is at the position after the changed range.\n\t\t\toffset = change.offset + change.howMany;\n\t\t\t// We changed `howMany` old nodes, update `oldChildrenHandled`.\n\t\t\toldChildrenHandled += change.howMany;\n\t\t}\n\t}\n\n\t// Fill \"equal\" actions at the end of actions set. Use `oldChildrenHandled` to see how many children\n\t// has not been changed / removed at the end of their parent.\n\tif ( oldChildrenHandled < oldChildrenLength ) {\n\t\tfor ( let i = 0; i < oldChildrenLength - oldChildrenHandled - offset; i++ ) {\n\t\t\tactions.push( 'e' );\n\t\t}\n\t}\n\n\treturn actions;\n}\n\n// Filter callback for Array.filter that filters out change entries that are in graveyard.\nfunction _changesInGraveyardFilter( entry ) {\n\tconst posInGy = entry.position && entry.position.root.rootName == '$graveyard';\n\tconst rangeInGy = entry.range && entry.range.root.rootName == '$graveyard';\n\n\treturn !posInGy && !rangeInGy;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/history\n */\n\n/**\n * `History` keeps the track of all the operations applied to the {@link module:engine/model/document~Document document}.\n */\nexport default class History {\n\t/**\n\t * Creates an empty History instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Operations added to the history.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.<module:engine/model/operation/operation~Operation>} module:engine/model/history~History#_operations\n\t\t */\n\t\tthis._operations = [];\n\n\t\t/**\n\t\t * Holds an information which {@link module:engine/model/operation/operation~Operation operation} undoes which\n\t\t * {@link module:engine/model/operation/operation~Operation operation}.\n\t\t *\n\t\t * Keys of the map are \"undoing operations\", that is operations that undone some other operations. For each key, the\n\t\t * value is an operation that has been undone by the \"undoing operation\".\n\t\t *\n\t\t * @private\n\t\t * @member {Map} module:engine/model/history~History#_undoPairs\n\t\t */\n\t\tthis._undoPairs = new Map();\n\n\t\t/**\n\t\t * Holds all undone operations.\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<module:engine/model/operation/operation~Operation>} module:engine/model/history~History#_undoneOperations\n\t\t */\n\t\tthis._undoneOperations = new Set();\n\t}\n\n\t/**\n\t * Adds an operation to the history.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to add.\n\t */\n\taddOperation( operation ) {\n\t\tif ( this._operations.includes( operation ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._operations.push( operation );\n\t}\n\n\t/**\n\t * Returns operations added to the history.\n\t *\n\t * @param {Number} [from=0] Base version from which operations should be returned (inclusive). Defaults to `0`, which means\n\t * that operations from the first one will be returned.\n\t * @param {Number} [to=Number.POSITIVE_INFINITY] Base version up to which operations should be returned (exclusive).\n\t * Defaults to `Number.POSITIVE_INFINITY` which means that operations up to the last one will be returned.\n\t * @returns {Iterable.<module:engine/model/operation/operation~Operation>} Operations added to the history.\n\t */\n\tgetOperations( from = 0, to = Number.POSITIVE_INFINITY ) {\n\t\tif ( from < 0 ) {\n\t\t\treturn [];\n\t\t}\n\n\t\treturn this._operations.slice( from, to );\n\t}\n\n\t/**\n\t * Returns operation from the history that bases on given `baseVersion`.\n\t *\n\t * @param {Number} baseVersion Base version of the operation to get.\n\t * @returns {module:engine/model/operation/operation~Operation|null} Operation with given base version or `null` if\n\t * there is no such operation in history.\n\t */\n\tgetOperation( baseVersion ) {\n\t\treturn this._operations[ baseVersion ];\n\t}\n\n\t/**\n\t * Marks in history that one operation is an operation that is undoing the other operation. By marking operation this way,\n\t * history is keeping more context information about operations, which helps in operational transformation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} undoneOperation Operation which is undone by `undoingOperation`.\n\t * @param {module:engine/model/operation/operation~Operation} undoingOperation Operation which undoes `undoneOperation`.\n\t */\n\tsetOperationAsUndone( undoneOperation, undoingOperation ) {\n\t\tthis._undoPairs.set( undoingOperation, undoneOperation );\n\t\tthis._undoneOperations.add( undoneOperation );\n\t}\n\n\t/**\n\t * Checks whether given `operation` is undoing any other operation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to check.\n\t * @returns {Boolean} `true` if given `operation` is undoing any other operation, `false` otherwise.\n\t */\n\tisUndoingOperation( operation ) {\n\t\treturn this._undoPairs.has( operation );\n\t}\n\n\t/**\n\t * Checks whether given `operation` has been undone by any other operation.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation to check.\n\t * @returns {Boolean} `true` if given `operation` has been undone any other operation, `false` otherwise.\n\t */\n\tisUndoneOperation( operation ) {\n\t\treturn this._undoneOperations.has( operation );\n\t}\n\n\t/**\n\t * For given `undoingOperation`, returns the operation which has been undone by it.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} undoingOperation\n\t * @returns {module:engine/model/operation/operation~Operation|undefined} Operation that has been undone by given\n\t * `undoingOperation` or `undefined` if given `undoingOperation` is not undoing any other operation.\n\t */\n\tgetUndoneOperation( undoingOperation ) {\n\t\treturn this._undoPairs.get( undoingOperation );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * Set of utils to handle unicode characters.\n *\n * @module utils/unicode\n */\n\n/**\n * Checks whether given `character` is a combining mark.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isCombiningMark( character ) {\n\treturn !!character && character.length == 1 && /[\\u0300-\\u036f\\u1ab0-\\u1aff\\u1dc0-\\u1dff\\u20d0-\\u20ff\\ufe20-\\ufe2f]/.test( character );\n}\n\n/**\n * Checks whether given `character` is a high half of surrogate pair.\n *\n * Using UTF-16 terminology, a surrogate pair denotes UTF-16 character using two UTF-8 characters. The surrogate pair\n * consist of high surrogate pair character followed by low surrogate pair character.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isHighSurrogateHalf( character ) {\n\treturn !!character && character.length == 1 && /[\\ud800-\\udbff]/.test( character );\n}\n\n/**\n * Checks whether given `character` is a low half of surrogate pair.\n *\n * Using UTF-16 terminology, a surrogate pair denotes UTF-16 character using two UTF-8 characters. The surrogate pair\n * consist of high surrogate pair character followed by low surrogate pair character.\n *\n * @param {String} character Character to check.\n * @returns {Boolean}\n */\nexport function isLowSurrogateHalf( character ) {\n\treturn !!character && character.length == 1 && /[\\udc00-\\udfff]/.test( character );\n}\n\n/**\n * Checks whether given offset in a string is inside a surrogate pair (between two surrogate halves).\n *\n * @param {String} string String to check.\n * @param {Number} offset Offset to check.\n * @returns {Boolean}\n */\nexport function isInsideSurrogatePair( string, offset ) {\n\treturn isHighSurrogateHalf( string.charAt( offset - 1 ) ) && isLowSurrogateHalf( string.charAt( offset ) );\n}\n\n/**\n * Checks whether given offset in a string is between base character and combining mark or between two combining marks.\n *\n * @param {String} string String to check.\n * @param {Number} offset Offset to check.\n * @returns {Boolean}\n */\nexport function isInsideCombinedSymbol( string, offset ) {\n\treturn isCombiningMark( string.charAt( offset ) );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/document\n */\n\nimport Differ from './differ';\nimport RootElement from './rootelement';\nimport History from './history';\nimport DocumentSelection from './documentselection';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { isInsideSurrogatePair, isInsideCombinedSymbol } from '@ckeditor/ckeditor5-utils/src/unicode';\nimport { clone } from 'lodash-es';\n\n// @if CK_DEBUG_ENGINE // const { logDocument } = require( '../dev-utils/utils' );\n\nconst graveyardName = '$graveyard';\n\n/**\n * Data model's document. It contains the model's structure, its selection and the history of changes.\n *\n * Read more about working with the model in\n * {@glink framework/guides/architecture/editing-engine#model introduction to the the editing engine's architecture}.\n *\n * Usually, the document contains just one {@link module:engine/model/document~Document#roots root element}, so\n * you can retrieve it by just calling {@link module:engine/model/document~Document#getRoot} without specifying its name:\n *\n *\t\tmodel.document.getRoot(); // -> returns the main root\n *\n * However, the document may contain multiple roots – e.g. when the editor has multiple editable areas\n * (e.g. a title and a body of a message).\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Document {\n\t/**\n\t * Creates an empty document instance with no {@link #roots} (other than\n\t * the {@link #graveyard graveyard root}).\n\t */\n\tconstructor( model ) {\n\t\t/**\n\t\t * The {@link module:engine/model/model~Model model} that the document is a part of.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The document version. It starts from `0` and every operation increases the version number. It is used to ensure that\n\t\t * operations are applied on a proper document version.\n\t\t *\n\t\t * If the {@link module:engine/model/operation/operation~Operation#baseVersion base version} does not match the document version,\n\t\t * a {@link module:utils/ckeditorerror~CKEditorError model-document-applyOperation-wrong-version} error is thrown.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Number}\n\t\t */\n\t\tthis.version = 0;\n\n\t\t/**\n\t\t * The document's history.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/history~History}\n\t\t */\n\t\tthis.history = new History( this );\n\n\t\t/**\n\t\t * The selection in this document.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = new DocumentSelection( this );\n\n\t\t/**\n\t\t * A list of roots that are owned and managed by this document. Use {@link #createRoot} and\n\t\t * {@link #getRoot} to manipulate it.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis.roots = new Collection( { idProperty: 'rootName' } );\n\n\t\t/**\n\t\t * The model differ object. Its role is to buffer changes done on the model document and then calculate a diff of those changes.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:engine/model/differ~Differ}\n\t\t */\n\t\tthis.differ = new Differ( model.markers );\n\n\t\t/**\n\t\t * Post-fixer callbacks registered to the model document.\n\t\t *\n\t\t * @private\n\t\t * @type {Set.<Function>}\n\t\t */\n\t\tthis._postFixers = new Set();\n\n\t\t/**\n\t\t * A boolean indicates whether the selection has changed until\n\t\t *\n\t\t * @private\n\t\t * @type {Boolean}\n\t\t */\n\t\tthis._hasSelectionChangedFromTheLastChangeBlock = false;\n\n\t\t// Graveyard tree root. Document always have a graveyard root, which stores removed nodes.\n\t\tthis.createRoot( '$root', graveyardName );\n\n\t\t// First, if the operation is a document operation check if it's base version is correct.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation && operation.baseVersion !== this.version ) {\n\t\t\t\t/**\n\t\t\t\t * Only operations with matching versions can be applied.\n\t\t\t\t *\n\t\t\t\t * @error document-applyOperation-wrong-version\n\t\t\t\t * @param {module:engine/model/operation/operation~Operation} operation\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t'model-document-applyOperation-wrong-version: Only operations with matching versions can be applied.',\n\t\t\t\t\tthis,\n\t\t\t\t\t{ operation }\n\t\t\t\t);\n\t\t\t}\n\t\t}, { priority: 'highest' } );\n\n\t\t// Then, still before an operation is applied on model, buffer the change in differ.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation ) {\n\t\t\t\tthis.differ.bufferOperation( operation );\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\n\t\t// After the operation is applied, bump document's version and add the operation to the history.\n\t\tthis.listenTo( model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( operation.isDocumentOperation ) {\n\t\t\t\tthis.version++;\n\t\t\t\tthis.history.addOperation( operation );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// Listen to selection changes. If selection changed, mark it.\n\t\tthis.listenTo( this.selection, 'change', () => {\n\t\t\tthis._hasSelectionChangedFromTheLastChangeBlock = true;\n\t\t} );\n\n\t\t// Buffer marker changes.\n\t\t// This is not covered in buffering operations because markers may change outside of them (when they\n\t\t// are modified using `model.markers` collection, not through `MarkerOperation`).\n\t\tthis.listenTo( model.markers, 'update', ( evt, marker, oldRange, newRange ) => {\n\t\t\t// Whenever marker is updated, buffer that change.\n\t\t\tthis.differ.bufferMarkerChange( marker.name, oldRange, newRange, marker.affectsData );\n\n\t\t\tif ( oldRange === null ) {\n\t\t\t\t// If this is a new marker, add a listener that will buffer change whenever marker changes.\n\t\t\t\tmarker.on( 'change', ( evt, oldRange ) => {\n\t\t\t\t\tthis.differ.bufferMarkerChange( marker.name, oldRange, marker.getRange(), marker.affectsData );\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * The graveyard tree root. A document always has a graveyard root that stores removed nodes.\n\t *\n\t * @readonly\n\t * @member {module:engine/model/rootelement~RootElement}\n\t */\n\tget graveyard() {\n\t\treturn this.getRoot( graveyardName );\n\t}\n\n\t/**\n\t * Creates a new root.\n\t *\n\t * @param {String} [elementName='$root'] The element name. Defaults to `'$root'` which also has some basic schema defined\n\t * (`$block`s are allowed inside the `$root`). Make sure to define a proper schema if you use a different name.\n\t * @param {String} [rootName='main'] A unique root name.\n\t * @returns {module:engine/model/rootelement~RootElement} The created root.\n\t */\n\tcreateRoot( elementName = '$root', rootName = 'main' ) {\n\t\tif ( this.roots.get( rootName ) ) {\n\t\t\t/**\n\t\t\t * A root with the specified name already exists.\n\t\t\t *\n\t\t\t * @error model-document-createRoot-name-exists\n\t\t\t * @param {module:engine/model/document~Document} doc\n\t\t\t * @param {String} name\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-document-createRoot-name-exists: Root with specified name already exists.',\n\t\t\t\tthis,\n\t\t\t\t{ name: rootName }\n\t\t\t);\n\t\t}\n\n\t\tconst root = new RootElement( this, elementName, rootName );\n\t\tthis.roots.add( root );\n\n\t\treturn root;\n\t}\n\n\t/**\n\t * Removes all event listeners set by the document instance.\n\t */\n\tdestroy() {\n\t\tthis.selection.destroy();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Returns a root by its name.\n\t *\n\t * @param {String} [name='main'] A unique root name.\n\t * @returns {module:engine/model/rootelement~RootElement|null} The root registered under a given name or `null` when\n\t * there is no root with the given name.\n\t */\n\tgetRoot( name = 'main' ) {\n\t\treturn this.roots.get( name );\n\t}\n\n\t/**\n\t * Returns an array with names of all roots (without the {@link #graveyard}) added to the document.\n\t *\n\t * @returns {Array.<String>} Roots names.\n\t */\n\tgetRootNames() {\n\t\treturn Array.from( this.roots, root => root.rootName ).filter( name => name != graveyardName );\n\t}\n\n\t/**\n\t * Used to register a post-fixer callback. A post-fixer mechanism guarantees that the features\n\t * will operate on a correct model state.\n\t *\n\t * An execution of a feature may lead to an incorrect document tree state. The callbacks are used to fix the document tree after\n\t * it has changed. Post-fixers are fired just after all changes from the outermost change block were applied but\n\t * before the {@link module:engine/model/document~Document#event:change change event} is fired. If a post-fixer callback made\n\t * a change, it should return `true`. When this happens, all post-fixers are fired again to check if something else should\n\t * not be fixed in the new document tree state.\n\t *\n\t * As a parameter, a post-fixer callback receives a {@link module:engine/model/writer~Writer writer} instance connected with the\n\t * executed changes block. Thanks to that, all changes done by the callback will be added to the same\n\t * {@link module:engine/model/batch~Batch batch} (and undo step) as the original changes. This makes post-fixer changes transparent\n\t * for the user.\n\t *\n\t * An example of a post-fixer is a callback that checks if all the data were removed from the editor. If so, the\n\t * callback should add an empty paragraph so that the editor is never empty:\n\t *\n\t *\t\tdocument.registerPostFixer( writer => {\n\t *\t\t\tconst changes = document.differ.getChanges();\n\t *\n\t *\t\t\t// Check if the changes lead to an empty root in the editor.\n\t *\t\t\tfor ( const entry of changes ) {\n\t *\t\t\t\tif ( entry.type == 'remove' && entry.position.root.isEmpty ) {\n\t *\t\t\t\t\twriter.insertElement( 'paragraph', entry.position.root, 0 );\n\t *\n\t *\t\t\t\t\t// It is fine to return early, even if multiple roots would need to be fixed.\n\t *\t\t\t\t\t// All post-fixers will be fired again, so if there are more empty roots, those will be fixed, too.\n\t *\t\t\t\t\treturn true;\n\t *\t\t\t\t}\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @param {Function} postFixer\n\t */\n\tregisterPostFixer( postFixer ) {\n\t\tthis._postFixers.add( postFixer );\n\t}\n\n\t/**\n\t * A custom `toJSON()` method to solve child-parent circular dependencies.\n\t *\n\t * @returns {Object} A clone of this object with the document property changed to a string.\n\t */\n\ttoJSON() {\n\t\tconst json = clone( this );\n\n\t\t// Due to circular references we need to remove parent reference.\n\t\tjson.selection = '[engine.model.DocumentSelection]';\n\t\tjson.model = '[engine.model.Model]';\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Check if there were any changes done on document, and if so, call post-fixers,\n\t * fire `change` event for features and conversion and then reset the differ.\n\t * Fire `change:data` event when at least one operation or buffered marker changes the data.\n\t *\n\t * @protected\n\t * @fires change\n\t * @fires change:data\n\t * @param {module:engine/model/writer~Writer} writer The writer on which post-fixers will be called.\n\t */\n\t_handleChangeBlock( writer ) {\n\t\tif ( this._hasDocumentChangedFromTheLastChangeBlock() ) {\n\t\t\tthis._callPostFixers( writer );\n\n\t\t\t// Refresh selection attributes according to the final position in the model after the change.\n\t\t\tthis.selection.refresh();\n\n\t\t\tif ( this.differ.hasDataChanges() ) {\n\t\t\t\tthis.fire( 'change:data', writer.batch );\n\t\t\t} else {\n\t\t\t\tthis.fire( 'change', writer.batch );\n\t\t\t}\n\n\t\t\t// Theoretically, it is not necessary to refresh selection after change event because\n\t\t\t// post-fixers are the last who should change the model, but just in case...\n\t\t\tthis.selection.refresh();\n\n\t\t\tthis.differ.reset();\n\t\t}\n\n\t\tthis._hasSelectionChangedFromTheLastChangeBlock = false;\n\t}\n\n\t/**\n\t * Returns whether there is a buffered change or if the selection has changed from the last\n\t * {@link module:engine/model/model~Model#enqueueChange `enqueueChange()` block}\n\t * or {@link module:engine/model/model~Model#change `change()` block}.\n\t *\n\t * @protected\n\t * @returns {Boolean} Returns `true` if document has changed from the last `change()` or `enqueueChange()` block.\n\t */\n\t_hasDocumentChangedFromTheLastChangeBlock() {\n\t\treturn !this.differ.isEmpty || this._hasSelectionChangedFromTheLastChangeBlock;\n\t}\n\n\t/**\n\t * Returns the default root for this document which is either the first root that was added to the document using\n\t * {@link #createRoot} or the {@link #graveyard graveyard root} if no other roots were created.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/rootelement~RootElement} The default root for this document.\n\t */\n\t_getDefaultRoot() {\n\t\tfor ( const root of this.roots ) {\n\t\t\tif ( root !== this.graveyard ) {\n\t\t\t\treturn root;\n\t\t\t}\n\t\t}\n\n\t\treturn this.graveyard;\n\t}\n\n\t/**\n\t * Returns the default range for this selection. The default range is a collapsed range that starts and ends\n\t * at the beginning of this selection's document {@link #_getDefaultRoot default root}.\n\t *\n\t * @protected\n\t * @returns {module:engine/model/range~Range}\n\t */\n\t_getDefaultRange() {\n\t\tconst defaultRoot = this._getDefaultRoot();\n\t\tconst model = this.model;\n\t\tconst schema = model.schema;\n\n\t\t// Find the first position where the selection can be put.\n\t\tconst position = model.createPositionFromPath( defaultRoot, [ 0 ] );\n\t\tconst nearestRange = schema.getNearestSelectionRange( position );\n\n\t\t// If valid selection range is not found - return range collapsed at the beginning of the root.\n\t\treturn nearestRange || model.createRange( position );\n\t}\n\n\t/**\n\t * Checks whether a given {@link module:engine/model/range~Range range} is a valid range for\n\t * the {@link #selection document's selection}.\n\t *\n\t * @private\n\t * @param {module:engine/model/range~Range} range A range to check.\n\t * @returns {Boolean} `true` if `range` is valid, `false` otherwise.\n\t */\n\t_validateSelectionRange( range ) {\n\t\treturn validateTextNodePosition( range.start ) && validateTextNodePosition( range.end );\n\t}\n\n\t/**\n\t * Performs post-fixer loops. Executes post-fixer callbacks as long as none of them has done any changes to the model.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer The writer on which post-fixer callbacks will be called.\n\t */\n\t_callPostFixers( writer ) {\n\t\tlet wasFixed = false;\n\n\t\tdo {\n\t\t\tfor ( const callback of this._postFixers ) {\n\t\t\t\t// Ensure selection attributes are up to date before each post-fixer.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1673.\n\t\t\t\t//\n\t\t\t\t// It might be good to refresh the selection after each operation but at the moment it leads\n\t\t\t\t// to losing attributes for composition or and spell checking\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-typing/issues/188\n\t\t\t\tthis.selection.refresh();\n\n\t\t\t\twasFixed = callback( writer );\n\n\t\t\t\tif ( wasFixed ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} while ( wasFixed );\n\t}\n\n\t/**\n\t * Fired after each {@link module:engine/model/model~Model#enqueueChange `enqueueChange()` block} or the outermost\n\t * {@link module:engine/model/model~Model#change `change()` block} was executed and the document was changed\n\t * during that block's execution.\n\t *\n\t * The changes which this event will cover include:\n\t *\n\t * * document structure changes,\n\t * * selection changes,\n\t * * marker changes.\n\t *\n\t * If you want to be notified about all these changes, then simply listen to this event like this:\n\t *\n\t *\t\tmodel.document.on( 'change', () => {\n\t *\t\t\tconsole.log( 'The document has changed!' );\n\t *\t\t} );\n\t *\n\t * If, however, you only want to be notified about the data changes, then use the\n\t * {@link module:engine/model/document~Document#event:change:data change:data} event,\n\t * which is fired for document structure changes and marker changes (which affects the data).\n\t *\n\t *\t\tmodel.document.on( 'change:data', () => {\n\t *\t\t\tconsole.log( 'The data has changed!' );\n\t *\t\t} );\n\t *\n\t * @event change\n\t * @param {module:engine/model/batch~Batch} batch The batch that was used in the executed changes block.\n\t */\n\n\t/**\n\t * It is a narrower version of the {@link #event:change} event. It is fired for changes which\n\t * affect the editor data. This is:\n\t *\n\t * * document structure changes,\n\t * * marker changes (which affects the data).\n\t *\n\t * If you want to be notified about the data changes, then listen to this event:\n\t *\n\t *\t\tmodel.document.on( 'change:data', () => {\n\t *\t\t\tconsole.log( 'The data has changed!' );\n\t *\t\t} );\n\t *\n\t * If you would like to listen to all document changes, then check out the\n\t * {@link module:engine/model/document~Document#event:change change} event.\n\t *\n\t * @event change:data\n\t * @param {module:engine/model/batch~Batch} batch The batch that was used in the executed changes block.\n\t */\n\n\t// @if CK_DEBUG_ENGINE // log( version = null ) {\n\t// @if CK_DEBUG_ENGINE // \tversion = version === null ? this.version : version;\n\t// @if CK_DEBUG_ENGINE // \tlogDocument( this, version );\n\t// @if CK_DEBUG_ENGINE // }\n}\n\nmix( Document, EmitterMixin );\n\n// Checks whether given range boundary position is valid for document selection, meaning that is not between\n// unicode surrogate pairs or base character and combining marks.\nfunction validateTextNodePosition( rangeBoundary ) {\n\tconst textNode = rangeBoundary.textNode;\n\n\tif ( textNode ) {\n\t\tconst data = textNode.data;\n\t\tconst offset = rangeBoundary.offset - textNode.startOffset;\n\n\t\treturn !isInsideSurrogatePair( data, offset ) && !isInsideCombinedSymbol( data, offset );\n\t}\n\n\treturn true;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/markercollection\n */\n\nimport LiveRange from './liverange';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The collection of all {@link module:engine/model/markercollection~Marker markers} attached to the document.\n * It lets you {@link module:engine/model/markercollection~MarkerCollection#get get} markers or track them using\n * {@link module:engine/model/markercollection~MarkerCollection#event:update} event.\n *\n * To create, change or remove makers use {@link module:engine/model/writer~Writer model writers'} methods:\n * {@link module:engine/model/writer~Writer#addMarker} or {@link module:engine/model/writer~Writer#removeMarker}. Since\n * the writer is the only proper way to change the data model it is not possible to change markers directly using this\n * collection. All markers created by the writer will be automatically added to this collection.\n *\n * By default there is one marker collection available as {@link module:engine/model/model~Model#markers model property}.\n *\n * @see module:engine/model/markercollection~Marker\n */\nexport default class MarkerCollection {\n\t/**\n\t * Creates a markers collection.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Stores {@link ~Marker markers} added to the collection.\n\t\t *\n\t\t * @private\n\t\t * @member {Map} #_markers\n\t\t */\n\t\tthis._markers = new Map();\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * Iterates over all {@link ~Marker markers} added to the collection.\n\t *\n\t * @returns {Iterable}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._markers.values();\n\t}\n\n\t/**\n\t * Checks if marker with given `markerName` is in the collection.\n\t *\n\t * @param {String} markerName Marker name.\n\t * @returns {Boolean} `true` if marker with given `markerName` is in the collection, `false` otherwise.\n\t */\n\thas( markerName ) {\n\t\treturn this._markers.has( markerName );\n\t}\n\n\t/**\n\t * Returns {@link ~Marker marker} with given `markerName`.\n\t *\n\t * @param {String} markerName Name of marker to get.\n\t * @returns {module:engine/model/markercollection~Marker|null} Marker with given name or `null` if such marker was\n\t * not added to the collection.\n\t */\n\tget( markerName ) {\n\t\treturn this._markers.get( markerName ) || null;\n\t}\n\n\t/**\n\t * Creates and adds a {@link ~Marker marker} to the `MarkerCollection` with given name on given\n\t * {@link module:engine/model/range~Range range}.\n\t *\n\t * If `MarkerCollection` already had a marker with given name (or {@link ~Marker marker} was passed), the marker in\n\t * collection is updated and {@link module:engine/model/markercollection~MarkerCollection#event:update} event is fired\n\t * but only if there was a change (marker range or {@link module:engine/model/markercollection~Marker#managedUsingOperations}\n\t * flag has changed.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String|module:engine/model/markercollection~Marker} markerOrName Name of marker to set or marker instance to update.\n\t * @param {module:engine/model/range~Range} range Marker range.\n\t * @param {Boolean} [managedUsingOperations=false] Specifies whether the marker is managed using operations.\n\t * @param {Boolean} [affectsData=false] Specifies whether the marker affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t * @returns {module:engine/model/markercollection~Marker} `Marker` instance which was added or updated.\n\t */\n\t_set( markerOrName, range, managedUsingOperations = false, affectsData = false ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst oldMarker = this._markers.get( markerName );\n\n\t\tif ( oldMarker ) {\n\t\t\tconst oldRange = oldMarker.getRange();\n\t\t\tlet hasChanged = false;\n\n\t\t\tif ( !oldRange.isEqual( range ) ) {\n\t\t\t\toldMarker._attachLiveRange( LiveRange.fromRange( range ) );\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( managedUsingOperations != oldMarker.managedUsingOperations ) {\n\t\t\t\toldMarker._managedUsingOperations = managedUsingOperations;\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( typeof affectsData === 'boolean' && affectsData != oldMarker.affectsData ) {\n\t\t\t\toldMarker._affectsData = affectsData;\n\t\t\t\thasChanged = true;\n\t\t\t}\n\n\t\t\tif ( hasChanged ) {\n\t\t\t\tthis.fire( 'update:' + markerName, oldMarker, oldRange, range );\n\t\t\t}\n\n\t\t\treturn oldMarker;\n\t\t}\n\n\t\tconst liveRange = LiveRange.fromRange( range );\n\t\tconst marker = new Marker( markerName, liveRange, managedUsingOperations, affectsData );\n\n\t\tthis._markers.set( markerName, marker );\n\t\tthis.fire( 'update:' + markerName, marker, null, range );\n\n\t\treturn marker;\n\t}\n\n\t/**\n\t * Removes given {@link ~Marker marker} or a marker with given name from the `MarkerCollection`.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String} markerOrName Marker or name of a marker to remove.\n\t * @returns {Boolean} `true` if marker was found and removed, `false` otherwise.\n\t */\n\t_remove( markerOrName ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst oldMarker = this._markers.get( markerName );\n\n\t\tif ( oldMarker ) {\n\t\t\tthis._markers.delete( markerName );\n\t\t\tthis.fire( 'update:' + markerName, oldMarker, oldMarker.getRange(), null );\n\n\t\t\tthis._destroyMarker( oldMarker );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Fires an {@link module:engine/model/markercollection~MarkerCollection#event:update} event for the given {@link ~Marker marker}\n\t * but does not change the marker. Useful to force {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher downcast\n\t * conversion} for the marker.\n\t *\n\t * @protected\n\t * @fires module:engine/model/markercollection~MarkerCollection#event:update\n\t * @param {String} markerOrName Marker or name of a marker to refresh.\n\t */\n\t_refresh( markerOrName ) {\n\t\tconst markerName = markerOrName instanceof Marker ? markerOrName.name : markerOrName;\n\t\tconst marker = this._markers.get( markerName );\n\n\t\tif ( !marker ) {\n\t\t\tthrow new CKEditorError( 'markercollection-refresh-marker-not-exists: Marker with provided name does not exists.', this );\n\t\t}\n\n\t\tconst range = marker.getRange();\n\n\t\tthis.fire( 'update:' + markerName, marker, range, range, marker.managedUsingOperations, marker.affectsData );\n\t}\n\n\t/**\n\t * Returns iterator that iterates over all markers, which ranges contain given {@link module:engine/model/position~Position position}.\n\t *\n\t * @param {module:engine/model/position~Position} position\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersAtPosition( position ) {\n\t\tfor ( const marker of this ) {\n\t\t\tif ( marker.getRange().containsPosition( position ) ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns iterator that iterates over all markers, which intersects with given {@link module:engine/model/range~Range range}.\n\t *\n\t * @param {module:engine/model/range~Range} range\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersIntersectingRange( range ) {\n\t\tfor ( const marker of this ) {\n\t\t\tif ( marker.getRange().getIntersection( range ) !== null ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Destroys marker collection and all markers inside it.\n\t */\n\tdestroy() {\n\t\tfor ( const marker of this._markers.values() ) {\n\t\t\tthis._destroyMarker( marker );\n\t\t}\n\n\t\tthis._markers = null;\n\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Iterates over all markers that starts with given `prefix`.\n\t *\n\t *\t\tconst markerFooA = markersCollection.set( 'foo:a', rangeFooA );\n\t *\t\tconst markerFooB = markersCollection.set( 'foo:b', rangeFooB );\n\t *\t\tconst markerBarA = markersCollection.set( 'bar:a', rangeBarA );\n\t *\t\tconst markerFooBarA = markersCollection.set( 'foobar:a', rangeFooBarA );\n\t *\t\tArray.from( markersCollection.getMarkersGroup( 'foo' ) ); // [ markerFooA, markerFooB ]\n\t *\t\tArray.from( markersCollection.getMarkersGroup( 'a' ) ); // []\n\t *\n\t * @param prefix\n\t * @returns {Iterable.<module:engine/model/markercollection~Marker>}\n\t */\n\t* getMarkersGroup( prefix ) {\n\t\tfor ( const marker of this._markers.values() ) {\n\t\t\tif ( marker.name.startsWith( prefix + ':' ) ) {\n\t\t\t\tyield marker;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Destroys the marker.\n\t *\n\t * @private\n\t * @param {module:engine/model/markercollection~Marker} marker Marker to destroy.\n\t */\n\t_destroyMarker( marker ) {\n\t\tmarker.stopListening();\n\t\tmarker._detachLiveRange();\n\t}\n\n\t/**\n\t * Fired whenever marker is added, updated or removed from `MarkerCollection`.\n\t *\n\t * @event update\n\t * @param {module:engine/model/markercollection~Marker} marker Updated Marker.\n\t * @param {module:engine/model/range~Range|null} oldRange Marker range before the update. When is not defined it\n\t * means that marker is just added.\n\t * @param {module:engine/model/range~Range|null} newRange Marker range after update. When is not defined it\n\t * means that marker is just removed.\n\t */\n}\n\nmix( MarkerCollection, EmitterMixin );\n\n/**\n * `Marker` is a continuous parts of model (like a range), is named and represent some kind of information about marked\n * part of model document. In contrary to {@link module:engine/model/node~Node nodes}, which are building blocks of\n * model document tree, markers are not stored directly in document tree but in\n * {@link module:engine/model/model~Model#markers model markers' collection}. Still, they are document data, by giving\n * additional meaning to the part of a model document between marker start and marker end.\n *\n * In this sense, markers are similar to adding and converting attributes on nodes. The difference is that attribute is\n * connected with a given node (e.g. a character is bold no matter if it gets moved or content around it changes).\n * Markers on the other hand are continuous ranges and are characterized by their start and end position. This means that\n * any character in the marker is marked by the marker. For example, if a character is moved outside of marker it stops being\n * \"special\" and the marker is shrunk. Similarly, when a character is moved into the marker from other place in document\n * model, it starts being \"special\" and the marker is enlarged.\n *\n * Another upside of markers is that finding marked part of document is fast and easy. Using attributes to mark some nodes\n * and then trying to find that part of document would require traversing whole document tree. Marker gives instant access\n * to the range which it is marking at the moment.\n *\n * Markers are built from a name and a range.\n *\n * Range of the marker is updated automatically when document changes, using\n * {@link module:engine/model/liverange~LiveRange live range} mechanism.\n *\n * Name is used to group and identify markers. Names have to be unique, but markers can be grouped by\n * using common prefixes, separated with `:`, for example: `user:john` or `search:3`. That's useful in term of creating\n * namespaces for custom elements (e.g. comments, highlights). You can use this prefixes in\n * {@link module:engine/model/markercollection~MarkerCollection#event:update} listeners to listen on changes in a group of markers.\n * For instance: `model.markers.on( 'update:user', callback );` will be called whenever any `user:*` markers changes.\n *\n * There are two types of markers.\n *\n * 1. Markers managed directly, without using operations. They are added directly by {@link module:engine/model/writer~Writer}\n * to the {@link module:engine/model/markercollection~MarkerCollection} without any additional mechanism. They can be used\n * as bookmarks or visual markers. They are great for showing results of the find, or select link when the focus is in the input.\n *\n * 1. Markers managed using operations. These markers are also stored in {@link module:engine/model/markercollection~MarkerCollection}\n * but changes in these markers is managed the same way all other changes in the model structure - using operations.\n * Therefore, they are handled in the undo stack and synchronized between clients if the collaboration plugin is enabled.\n * This type of markers is useful for solutions like spell checking or comments.\n *\n * Both type of them should be added / updated by {@link module:engine/model/writer~Writer#addMarker}\n * and removed by {@link module:engine/model/writer~Writer#removeMarker} methods.\n *\n *\t\tmodel.change( ( writer ) => {\n * \t\t\tconst marker = writer.addMarker( name, { range, usingOperation: true } );\n *\n * \t\t\t// ...\n *\n * \t\t\twriter.removeMarker( marker );\n *\t\t} );\n *\n * See {@link module:engine/model/writer~Writer} to find more examples.\n *\n * Since markers need to track change in the document, for efficiency reasons, it is best to create and keep as little\n * markers as possible and remove them as soon as they are not needed anymore.\n *\n * Markers can be downcasted and upcasted.\n *\n * Markers downcast happens on {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:addMarker} and\n * {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:removeMarker} events.\n * Use {@link module:engine/conversion/downcasthelpers downcast converters} or attach a custom converter to mentioned events.\n * For {@link module:engine/controller/datacontroller~DataController data pipeline}, marker should be downcasted to an element.\n * Then, it can be upcasted back to a marker. Again, use {@link module:engine/conversion/upcasthelpers upcast converters} or\n * attach a custom converter to {@link module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element}.\n *\n * `Marker` instances are created and destroyed only by {@link ~MarkerCollection MarkerCollection}.\n */\nclass Marker {\n\t/**\n\t * Creates a marker instance.\n\t *\n\t * @param {String} name Marker name.\n\t * @param {module:engine/model/liverange~LiveRange} liveRange Range marked by the marker.\n\t * @param {Boolean} managedUsingOperations Specifies whether the marker is managed using operations.\n\t * @param {Boolean} affectsData Specifies whether the marker affects the data produced by the data pipeline\n\t * (is persisted in the editor's data).\n\t */\n\tconstructor( name, liveRange, managedUsingOperations, affectsData ) {\n\t\t/**\n\t\t * Marker's name.\n\t\t *\n\t\t * @readonly\n\t\t * @type {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Range marked by the marker.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:engine/model/liverange~LiveRange}\n\t\t */\n\t\tthis._liveRange = this._attachLiveRange( liveRange );\n\n\t\t/**\n\t\t * Flag indicates if the marker is managed using operations or not.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._managedUsingOperations = managedUsingOperations;\n\n\t\t/**\n\t\t * Specifies whether the marker affects the data produced by the data pipeline\n\t\t * (is persisted in the editor's data).\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._affectsData = affectsData;\n\t}\n\n\t/**\n\t * A value indicating if the marker is managed using operations.\n\t * See {@link ~Marker marker class description} to learn more about marker types.\n\t * See {@link module:engine/model/writer~Writer#addMarker}.\n\t *\n\t * @returns {Boolean}\n\t */\n\tget managedUsingOperations() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._managedUsingOperations;\n\t}\n\n\t/**\n\t * A value indicating if the marker changes the data.\n\t *\n\t * @returns {Boolean}\n\t */\n\tget affectsData() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._affectsData;\n\t}\n\n\t/**\n\t * Returns current marker start position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetStart() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.start.clone();\n\t}\n\n\t/**\n\t * Returns current marker end position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetEnd() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.end.clone();\n\t}\n\n\t/**\n\t * Returns a range that represents the current state of the marker.\n\t *\n\t * Keep in mind that returned value is a {@link module:engine/model/range~Range Range}, not a\n\t * {@link module:engine/model/liverange~LiveRange LiveRange}. This means that it is up-to-date and relevant only\n\t * until next model document change. Do not store values returned by this method. Instead, store {@link ~Marker#name}\n\t * and get `Marker` instance from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection} every\n\t * time there is a need to read marker properties. This will guarantee that the marker has not been removed and\n\t * that it's data is up-to-date.\n\t *\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tgetRange() {\n\t\tif ( !this._liveRange ) {\n\t\t\tthrow new CKEditorError( 'marker-destroyed: Cannot use a destroyed marker instance.', this );\n\t\t}\n\n\t\treturn this._liveRange.toRange();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tmarker.is( 'marker' ); // -> true\n\t *\t\tmarker.is( 'model:marker' ); // -> true\n\t *\n\t *\t\tmarker.is( 'view:element' ); // -> false\n\t *\t\tmarker.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'marker' || type == 'model:marker';\n\t}\n\n\t/**\n\t * Binds new live range to the marker and detach the old one if is attached.\n\t *\n\t * @protected\n\t * @param {module:engine/model/liverange~LiveRange} liveRange Live range to attach\n\t * @returns {module:engine/model/liverange~LiveRange} Attached live range.\n\t */\n\t_attachLiveRange( liveRange ) {\n\t\tif ( this._liveRange ) {\n\t\t\tthis._detachLiveRange();\n\t\t}\n\n\t\t// Delegating does not work with namespaces. Alternatively, we could delegate all events (using `*`).\n\t\tliveRange.delegate( 'change:range' ).to( this );\n\t\tliveRange.delegate( 'change:content' ).to( this );\n\n\t\tthis._liveRange = liveRange;\n\n\t\treturn liveRange;\n\t}\n\n\t/**\n\t * Unbinds and destroys currently attached live range.\n\t *\n\t * @protected\n\t */\n\t_detachLiveRange() {\n\t\tthis._liveRange.stopDelegating( 'change:range', this );\n\t\tthis._liveRange.stopDelegating( 'change:content', this );\n\t\tthis._liveRange.detach();\n\t\tthis._liveRange = null;\n\t}\n\n\t/**\n\t * Fired whenever {@link ~Marker#_liveRange marker range} is changed due to changes on {@link module:engine/model/document~Document}.\n\t * This is a delegated {@link module:engine/model/liverange~LiveRange#event:change:range LiveRange change:range event}.\n\t *\n\t * When marker is removed from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection},\n\t * all event listeners listening to it should be removed. It is best to do it on\n\t * {@link module:engine/model/markercollection~MarkerCollection#event:update MarkerCollection update event}.\n\t *\n\t * @see module:engine/model/liverange~LiveRange#event:change:range\n\t * @event change:range\n\t * @param {module:engine/model/range~Range} oldRange\n\t * @param {Object} data\n\t */\n\n\t/**\n\t * Fired whenever change on {@link module:engine/model/document~Document} is done inside {@link ~Marker#_liveRange marker range}.\n\t * This is a delegated {@link module:engine/model/liverange~LiveRange#event:change:content LiveRange change:content event}.\n\t *\n\t * When marker is removed from {@link module:engine/model/markercollection~MarkerCollection MarkerCollection},\n\t * all event listeners listening to it should be removed. It is best to do it on\n\t * {@link module:engine/model/markercollection~MarkerCollection#event:update MarkerCollection update event}.\n\t *\n\t * @see module:engine/model/liverange~LiveRange#event:change:content\n\t * @event change:content\n\t * @param {module:engine/model/range~Range} oldRange\n\t * @param {Object} data\n\t */\n}\n\nmix( Marker, EmitterMixin );\n\n/**\n * Cannot use a {@link module:engine/model/markercollection~MarkerCollection#destroy destroyed marker} instance.\n *\n * @error marker-destroyed\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/liveposition\n */\n\nimport Position from './position';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * `LivePosition` is a type of {@link module:engine/model/position~Position Position}\n * that updates itself as {@link module:engine/model/document~Document document}\n * is changed through operations. It may be used as a bookmark.\n *\n * **Note:** Contrary to {@link module:engine/model/position~Position}, `LivePosition` works only in roots that are\n * {@link module:engine/model/rootelement~RootElement}.\n * If {@link module:engine/model/documentfragment~DocumentFragment} is passed, error will be thrown.\n *\n * **Note:** Be very careful when dealing with `LivePosition`. Each `LivePosition` instance bind events that might\n * have to be unbound.\n * Use {@link module:engine/model/liveposition~LivePosition#detach} whenever you don't need `LivePosition` anymore.\n *\n * @extends module:engine/model/position~Position\n */\nexport default class LivePosition extends Position {\n\t/**\n\t * Creates a live position.\n\t *\n\t * @see module:engine/model/position~Position\n\t * @param {module:engine/model/rootelement~RootElement} root\n\t * @param {Array.<Number>} path\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness]\n\t */\n\tconstructor( root, path, stickiness = 'toNone' ) {\n\t\tsuper( root, path, stickiness );\n\n\t\tif ( !this.root.is( 'rootElement' ) ) {\n\t\t\t/**\n\t\t\t * LivePosition's root has to be an instance of RootElement.\n\t\t\t *\n\t\t\t * @error liveposition-root-not-rootelement\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-liveposition-root-not-rootelement: LivePosition\\'s root has to be an instance of RootElement.',\n\t\t\t\troot\n\t\t\t);\n\t\t}\n\n\t\tbindWithDocument.call( this );\n\t}\n\n\t/**\n\t * Unbinds all events previously bound by `LivePosition`. Use it whenever you don't need `LivePosition` instance\n\t * anymore (i.e. when leaving scope in which it was declared or before re-assigning variable that was\n\t * referring to it).\n\t */\n\tdetach() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Checks whether this object is of the given.\n\t *\n\t *\t\tlivePosition.is( 'position' ); // -> true\n\t *\t\tlivePosition.is( 'model:position' ); // -> true\n\t *\t\tlivePosition.is( 'liveposition' ); // -> true\n\t *\t\tlivePosition.is( 'model:livePosition' ); // -> true\n\t *\n\t *\t\tlivePosition.is( 'view:position' ); // -> false\n\t *\t\tlivePosition.is( 'documentSelection' ); // -> false\n\t *\n\t * {@link module:engine/model/node~Node#is Check the entire list of model objects} which implement the `is()` method.\n\t *\n\t * @param {String} type\n\t * @returns {Boolean}\n\t */\n\tis( type ) {\n\t\treturn type == 'livePosition' || type == 'model:livePosition' || super.is( type );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/position~Position position instance}, which is equal to this live position.\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\ttoPosition() {\n\t\treturn new Position( this.root, this.path.slice(), this.stickiness );\n\t}\n\n\t/**\n\t * Creates a `LivePosition` instance that is equal to position.\n\t *\n\t * @param {module:engine/model/position~Position} position\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness]\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic fromPosition( position, stickiness ) {\n\t\treturn new this( position.root, position.path.slice(), stickiness ? stickiness : position.stickiness );\n\t}\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createAfter\n\t * @see module:engine/model/position~Position._createAfter\n\t * @param {module:engine/model/node~Node} node\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createBefore\n\t * @see module:engine/model/position~Position._createBefore\n\t * @param {module:engine/model/node~Node} node\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * @static\n\t * @protected\n\t * @method module:engine/model/liveposition~LivePosition._createAt\n\t * @see module:engine/model/position~Position._createAt\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset]\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone']\n\t * @returns {module:engine/model/liveposition~LivePosition}\n\t */\n\n\t/**\n\t * Fired when `LivePosition` instance is changed due to changes on {@link module:engine/model/document~Document}.\n\t *\n\t * @event module:engine/model/liveposition~LivePosition#change\n\t * @param {module:engine/model/position~Position} oldPosition Position equal to this live position before it got changed.\n\t */\n}\n\n// Binds this `LivePosition` to the {@link module:engine/model/document~Document document} that owns\n// this position's {@link module:engine/model/position~Position#root root}.\n//\n// @private\nfunction bindWithDocument() {\n\tthis.listenTo(\n\t\tthis.root.document.model,\n\t\t'applyOperation',\n\t\t( event, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\ttransform.call( this, operation );\n\t\t},\n\t\t{ priority: 'low' }\n\t);\n}\n\n// Updates this position accordingly to the updates applied to the model. Bases on change events.\n//\n// @private\n// @param {module:engine/model/operation/operation~Operation} operation Executed operation.\nfunction transform( operation ) {\n\tconst result = this.getTransformedByOperation( operation );\n\n\tif ( !this.isEqual( result ) ) {\n\t\tconst oldPosition = this.toPosition();\n\n\t\tthis.path = result.path;\n\t\tthis.root = result.root;\n\n\t\tthis.fire( 'change', oldPosition );\n\t}\n}\n\nmix( LivePosition, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/insertcontent\n */\n\nimport Position from '../position';\nimport LivePosition from '../liveposition';\nimport Element from '../element';\nimport Range from '../range';\nimport DocumentSelection from '../documentselection';\nimport Selection from '../selection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Inserts content into the editor (specified selection) as one would expect the paste\n * functionality to work.\n *\n * If an instance of {@link module:engine/model/selection~Selection} is passed as `selectable` it will be modified\n * to the insertion selection (equal to a range to be selected after insertion).\n *\n * If `selectable` is not passed, the content will be inserted using the current selection of the model document.\n *\n * **Note:** Use {@link module:engine/model/model~Model#insertContent} instead of this function.\n * This function is only exposed to be reusable in algorithms which change the {@link module:engine/model/model~Model#insertContent}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which the insertion\n * should be performed.\n * @param {module:engine/model/documentfragment~DocumentFragment|module:engine/model/item~Item} content The content to insert.\n * @param {module:engine/model/selection~Selectable} [selectable=model.document.selection]\n * Selection into which the content should be inserted.\n * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n * @returns {module:engine/model/range~Range} Range which contains all the performed changes. This is a range that, if removed,\n * would return the model to the state before the insertion. If no changes were preformed by `insertContent`, returns a range collapsed\n * at the insertion position.\n */\nexport default function insertContent( model, content, selectable, placeOrOffset ) {\n\treturn model.change( writer => {\n\t\tlet selection;\n\n\t\tif ( !selectable ) {\n\t\t\tselection = model.document.selection;\n\t\t} else if ( selectable instanceof Selection || selectable instanceof DocumentSelection ) {\n\t\t\tselection = selectable;\n\t\t} else {\n\t\t\tselection = writer.createSelection( selectable, placeOrOffset );\n\t\t}\n\n\t\tconst insertionPosition = selection.getFirstPosition();\n\n\t\tif ( !selection.isCollapsed ) {\n\t\t\tmodel.deleteContent( selection, { doNotAutoparagraph: true } );\n\t\t}\n\n\t\tconst insertion = new Insertion( model, writer, insertionPosition );\n\n\t\tlet nodesToInsert;\n\n\t\tif ( content.is( 'documentFragment' ) ) {\n\t\t\tnodesToInsert = content.getChildren();\n\t\t} else {\n\t\t\tnodesToInsert = [ content ];\n\t\t}\n\n\t\tinsertion.handleNodes( nodesToInsert, {\n\t\t\t// The set of children being inserted is the only set in this context\n\t\t\t// so it's the first and last (it's a hack ;)).\n\t\t\tisFirst: true,\n\t\t\tisLast: true\n\t\t} );\n\n\t\tconst newRange = insertion.getSelectionRange();\n\n\t\t/* istanbul ignore else */\n\t\tif ( newRange ) {\n\t\t\tif ( selection instanceof DocumentSelection ) {\n\t\t\t\twriter.setSelection( newRange );\n\t\t\t} else {\n\t\t\t\tselection.setTo( newRange );\n\t\t\t}\n\t\t} else {\n\t\t\t// We are not testing else because it's a safe check for unpredictable edge cases:\n\t\t\t// an insertion without proper range to select.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Cannot determine a proper selection range after insertion.' );\n\t\t}\n\n\t\tconst affectedRange = insertion.getAffectedRange() || model.createRange( insertionPosition );\n\n\t\tinsertion.destroy();\n\n\t\treturn affectedRange;\n\t} );\n}\n\n/**\n * Utility class for performing content insertion.\n *\n * @private\n */\nclass Insertion {\n\tconstructor( model, writer, position ) {\n\t\t/**\n\t\t * The model in context of which the insertion should be performed.\n\t\t *\n\t\t * @member {module:engine/model~Model} #model\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * Batch to which operations will be added.\n\t\t *\n\t\t * @member {module:engine/controller/writer~Batch} #writer\n\t\t */\n\t\tthis.writer = writer;\n\n\t\t/**\n\t\t * The position at which (or near which) the next node will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} #position\n\t\t */\n\t\tthis.position = position;\n\n\t\t/**\n\t\t * Elements with which the inserted elements can be merged.\n\t\t *\n\t\t *\t\t<p>x^</p><p>y</p> + <p>z</p> (can merge to <p>x</p>)\n\t\t *\t\t<p>x</p><p>^y</p> + <p>z</p> (can merge to <p>y</p>)\n\t\t *\t\t<p>x^y</p> + <p>z</p> (can merge to <p>xy</p> which will be split during the action,\n\t\t *\t\t\t\t\t\t\t\tso both its pieces will be added to this set)\n\t\t *\n\t\t *\n\t\t * @member {Set} #canMergeWith\n\t\t */\n\t\tthis.canMergeWith = new Set( [ this.position.parent ] );\n\n\t\t/**\n\t\t * Schema of the model.\n\t\t *\n\t\t * @member {module:engine/model/schema~Schema} #schema\n\t\t */\n\t\tthis.schema = model.schema;\n\n\t\tthis._filterAttributesOf = [];\n\n\t\t/**\n\t\t * Beginning of the affected range. See {@link module:engine/model/utils/insertcontent~Insertion#getAffectedRange}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition|null} #_affectedStart\n\t\t */\n\t\tthis._affectedStart = null;\n\n\t\t/**\n\t\t * End of the affected range. See {@link module:engine/model/utils/insertcontent~Insertion#getAffectedRange}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition|null} #_affectedEnd\n\t\t */\n\t\tthis._affectedEnd = null;\n\t}\n\n\t/**\n\t * Handles insertion of a set of nodes.\n\t *\n\t * @param {Iterable.<module:engine/model/node~Node>} nodes Nodes to insert.\n\t * @param {Object} parentContext Context in which parent of these nodes was supposed to be inserted.\n\t * If the parent context is passed it means that the parent element was stripped (was not allowed).\n\t */\n\thandleNodes( nodes, parentContext ) {\n\t\tnodes = Array.from( nodes );\n\n\t\tfor ( let i = 0; i < nodes.length; i++ ) {\n\t\t\tconst node = nodes[ i ];\n\n\t\t\tthis._handleNode( node, {\n\t\t\t\tisFirst: i === 0 && parentContext.isFirst,\n\t\t\t\tisLast: ( i === ( nodes.length - 1 ) ) && parentContext.isLast\n\t\t\t} );\n\t\t}\n\n\t\t// TMP this will become a post-fixer.\n\t\tthis.schema.removeDisallowedAttributes( this._filterAttributesOf, this.writer );\n\t\tthis._filterAttributesOf = [];\n\t}\n\n\t/**\n\t * Returns range to be selected after insertion.\n\t * Returns `null` if there is no valid range to select after insertion.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetSelectionRange() {\n\t\tif ( this.nodeToSelect ) {\n\t\t\treturn Range._createOn( this.nodeToSelect );\n\t\t}\n\n\t\treturn this.model.schema.getNearestSelectionRange( this.position );\n\t}\n\n\t/**\n\t * Returns a range which contains all the performed changes. This is a range that, if removed, would return the model to the state\n\t * before the insertion. Returns `null` if no changes were done.\n\t *\n\t * @returns {module:engine/model/range~Range|null}\n\t */\n\tgetAffectedRange() {\n\t\tif ( !this._affectedStart ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn new Range( this._affectedStart, this._affectedEnd );\n\t}\n\n\t/**\n\t * Destroys `Insertion` instance.\n\t */\n\tdestroy() {\n\t\tif ( this._affectedStart ) {\n\t\t\tthis._affectedStart.detach();\n\t\t}\n\n\t\tif ( this._affectedEnd ) {\n\t\t\tthis._affectedEnd.detach();\n\t\t}\n\t}\n\n\t/**\n\t * Handles insertion of a single node.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node\n\t * @param {Object} context\n\t * @param {Boolean} context.isFirst Whether the given node is the first one in the content to be inserted.\n\t * @param {Boolean} context.isLast Whether the given node is the last one in the content to be inserted.\n\t */\n\t_handleNode( node, context ) {\n\t\t// Let's handle object in a special way.\n\t\t// * They should never be merged with other elements.\n\t\t// * If they are not allowed in any of the selection ancestors, they could be either autoparagraphed or totally removed.\n\t\tif ( this.schema.isObject( node ) ) {\n\t\t\tthis._handleObject( node, context );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Try to find a place for the given node.\n\t\t// Split the position.parent's branch up to a point where the node can be inserted.\n\t\t// If it isn't allowed in the whole branch, then of course don't split anything.\n\t\tconst isAllowed = this._checkAndSplitToAllowedPosition( node, context );\n\n\t\tif ( !isAllowed ) {\n\t\t\tthis._handleDisallowedNode( node, context );\n\n\t\t\treturn;\n\t\t}\n\n\t\tthis._insert( node );\n\n\t\t// After the node was inserted we may try to merge it with its siblings.\n\t\t// This should happen only if it was the first and/or last of the nodes (so only with boundary nodes)\n\t\t// and only if the selection was in those elements initially.\n\t\t//\n\t\t// E.g.:\n\t\t// <p>x^</p> + <p>y</p> => <p>x</p><p>y</p> => <p>xy[]</p>\n\t\t// and:\n\t\t// <p>x^y</p> + <p>z</p> => <p>x</p>^<p>y</p> + <p>z</p> => <p>x</p><p>z</p><p>y</p> => <p>xz[]y</p>\n\t\t// but:\n\t\t// <p>x</p><p>^</p><p>z</p> + <p>y</p> => <p>x</p><p>y</p><p>z</p> (no merging)\n\t\t// <p>x</p>[<img>]<p>z</p> + <p>y</p> => <p>x</p><p>y</p><p>z</p> (no merging, note: after running deleteContents\n\t\t//\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t it's exactly the same case as above)\n\t\tthis._mergeSiblingsOf( node, context );\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/element~Element} node The object element.\n\t * @param {Object} context\n\t */\n\t_handleObject( node, context ) {\n\t\t// Try finding it a place in the tree.\n\t\tif ( this._checkAndSplitToAllowedPosition( node ) ) {\n\t\t\tthis._insert( node );\n\t\t}\n\t\t// Try autoparagraphing.\n\t\telse {\n\t\t\tthis._tryAutoparagraphing( node, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The disallowed node which needs to be handled.\n\t * @param {Object} context\n\t */\n\t_handleDisallowedNode( node, context ) {\n\t\t// If the node is an element, try inserting its children (strip the parent).\n\t\tif ( node.is( 'element' ) ) {\n\t\t\tthis.handleNodes( node.getChildren(), context );\n\t\t}\n\t\t// If text is not allowed, try autoparagraphing it.\n\t\telse {\n\t\t\tthis._tryAutoparagraphing( node, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node to insert.\n\t */\n\t_insert( node ) {\n\t\t/* istanbul ignore if */\n\t\tif ( !this.schema.checkChild( this.position, node ) ) {\n\t\t\t// Algorithm's correctness check. We should never end up here but it's good to know that we did.\n\t\t\t// Note that it would often be a silent issue if we insert node in a place where it's not allowed.\n\n\t\t\t/**\n\t\t\t * Given node cannot be inserted on the given position.\n\t\t\t *\n\t\t\t * @error insertcontent-wrong-position\n\t\t\t * @param {module:engine/model/node~Node} node Node to insert.\n\t\t\t * @param {module:engine/model/position~Position} position Position to insert the node at.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'insertcontent-wrong-position: Given node cannot be inserted on the given position.',\n\t\t\t\tthis,\n\t\t\t\t{ node, position: this.position }\n\t\t\t);\n\t\t}\n\n\t\tconst livePos = LivePosition.fromPosition( this.position, 'toNext' );\n\n\t\tthis._setAffectedBoundaries( this.position );\n\t\tthis.writer.insert( node, this.position );\n\n\t\tthis.position = livePos.toPosition();\n\t\tlivePos.detach();\n\n\t\t// The last inserted object should be selected because we can't put a collapsed selection after it.\n\t\tif ( this.schema.isObject( node ) && !this.schema.checkChild( this.position, '$text' ) ) {\n\t\t\tthis.nodeToSelect = node;\n\t\t} else {\n\t\t\tthis.nodeToSelect = null;\n\t\t}\n\n\t\tthis._filterAttributesOf.push( node );\n\t}\n\n\t/**\n\t * Sets `_affectedStart` and `_affectedEnd` to the given `position`. Should be used before a change is done during insertion process to\n\t * mark the affected range.\n\t *\n\t * This method is used before inserting a node or splitting a parent node. `_affectedStart` and `_affectedEnd` are also changed\n\t * during merging, but the logic there is more complicated so it is left out of this function.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position\n\t */\n\t_setAffectedBoundaries( position ) {\n\t\t// Set affected boundaries stickiness so that those position will \"expand\" when something is inserted in between them:\n\t\t// <paragraph>Foo][bar</paragraph> -> <paragraph>Foo]xx[bar</paragraph>\n\t\t// This is why it cannot be a range but two separate positions.\n\t\tif ( !this._affectedStart ) {\n\t\t\tthis._affectedStart = LivePosition.fromPosition( position, 'toPrevious' );\n\t\t}\n\n\t\t// If `_affectedEnd` is before the new boundary position, expand `_affectedEnd`. This can happen if first inserted node was\n\t\t// inserted into the parent but the next node is moved-out of that parent:\n\t\t// (1) <paragraph>Foo][</paragraph> -> <paragraph>Foo]xx[</paragraph>\n\t\t// (2) <paragraph>Foo]xx[</paragraph> -> <paragraph>Foo]xx</paragraph><widget></widget>[\n\t\tif ( !this._affectedEnd || this._affectedEnd.isBefore( position ) ) {\n\t\t\tif ( this._affectedEnd ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t}\n\n\t\t\tthis._affectedEnd = LivePosition.fromPosition( position, 'toNext' );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t */\n\t_mergeSiblingsOf( node, context ) {\n\t\tif ( !( node instanceof Element ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst mergeLeft = this._canMergeLeft( node, context );\n\t\tconst mergeRight = this._canMergeRight( node, context );\n\t\tconst mergePosLeft = LivePosition._createBefore( node );\n\t\tmergePosLeft.stickiness = 'toNext';\n\t\tconst mergePosRight = LivePosition._createAfter( node );\n\t\tmergePosRight.stickiness = 'toNext';\n\n\t\tif ( mergeLeft ) {\n\t\t\tconst livePosition = LivePosition.fromPosition( this.position );\n\t\t\tlivePosition.stickiness = 'toNext';\n\n\t\t\t// If `_affectedStart` is sames as merge position, it means that the element \"marked\" by `_affectedStart` is going to be\n\t\t\t// removed and its contents will be moved. This won't transform `LivePosition` so `_affectedStart` needs to be moved\n\t\t\t// by hand to properly reflect affected range. (Due to `_affectedStart` and `_affectedEnd` stickiness, the \"range\" is\n\t\t\t// shown as `][`).\n\t\t\t//\n\t\t\t// Example - insert `<paragraph>Abc</paragraph><paragraph>Xyz</paragraph>` at the end of `<paragraph>Foo^</paragraph>`:\n\t\t\t//\n\t\t\t// <paragraph>Foo</paragraph><paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo</paragraph>]<paragraph>Abc</paragraph><paragraph>Xyz</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc</paragraph><paragraph>Xyz</paragraph>[<paragraph>Bar</paragraph>\n\t\t\t//\n\t\t\t// Note, that if we are here then something must have been inserted, so `_affectedStart` and `_affectedEnd` have to be set.\n\t\t\tif ( this._affectedStart.isEqual( mergePosLeft ) ) {\n\t\t\t\tthis._affectedStart.detach();\n\t\t\t\tthis._affectedStart = LivePosition._createAt( mergePosLeft.nodeBefore, 'end', 'toPrevious' );\n\t\t\t}\n\n\t\t\tthis.writer.merge( mergePosLeft );\n\n\t\t\t// If only one element (the merged one) is in the \"affected range\", also move the affected range end appropriately.\n\t\t\t//\n\t\t\t// Example - insert `<paragraph>Abc</paragraph>` at the of `<paragraph>Foo^</paragraph>`:\n\t\t\t//\n\t\t\t// <paragraph>Foo</paragraph><paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo</paragraph>]<paragraph>Abc</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc</paragraph>[<paragraph>Bar</paragraph> -->\n\t\t\t// <paragraph>Foo]Abc[</paragraph><paragraph>Bar</paragraph>\n\t\t\tif ( mergePosLeft.isEqual( this._affectedEnd ) && context.isLast ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t\tthis._affectedEnd = LivePosition._createAt( mergePosLeft.nodeBefore, 'end', 'toNext' );\n\t\t\t}\n\n\t\t\tthis.position = livePosition.toPosition();\n\t\t\tlivePosition.detach();\n\t\t}\n\n\t\tif ( mergeRight ) {\n\t\t\t/* istanbul ignore if */\n\t\t\tif ( !this.position.isEqual( mergePosRight ) ) {\n\t\t\t\t// Algorithm's correctness check. We should never end up here but it's good to know that we did.\n\t\t\t\t// At this point the insertion position should be after the node we'll merge. If it isn't,\n\t\t\t\t// it should need to be secured as in the left merge case.\n\t\t\t\t/**\n\t\t\t\t * An internal error occured during merging insertion content with siblings.\n\t\t\t\t * The insertion position should equal to the merge position.\n\t\t\t\t *\n\t\t\t\t * @error insertcontent-invalid-insertion-position\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'insertcontent-invalid-insertion-position', this );\n\t\t\t}\n\n\t\t\t// Move the position to the previous node, so it isn't moved to the graveyard on merge.\n\t\t\t// <p>x</p>[]<p>y</p> => <p>x[]</p><p>y</p>\n\t\t\tthis.position = Position._createAt( mergePosRight.nodeBefore, 'end' );\n\n\t\t\t// OK: <p>xx[]</p> + <p>yy</p> => <p>xx[]yy</p> (when sticks to previous)\n\t\t\t// NOK: <p>xx[]</p> + <p>yy</p> => <p>xxyy[]</p> (when sticks to next)\n\t\t\tconst livePosition = LivePosition.fromPosition( this.position, 'toPrevious' );\n\n\t\t\t// See comment above on moving `_affectedStart`.\n\t\t\tif ( this._affectedEnd.isEqual( mergePosRight ) ) {\n\t\t\t\tthis._affectedEnd.detach();\n\t\t\t\tthis._affectedEnd = LivePosition._createAt( mergePosRight.nodeBefore, 'end', 'toNext' );\n\t\t\t}\n\n\t\t\tthis.writer.merge( mergePosRight );\n\n\t\t\t// See comment above on moving `_affectedStart`.\n\t\t\tif ( mergePosRight.getShiftedBy( -1 ).isEqual( this._affectedStart ) && context.isFirst ) {\n\t\t\t\tthis._affectedStart.detach();\n\t\t\t\tthis._affectedStart = LivePosition._createAt( mergePosRight.nodeBefore, 0, 'toPrevious' );\n\t\t\t}\n\n\t\t\tthis.position = livePosition.toPosition();\n\t\t\tlivePosition.detach();\n\t\t}\n\n\t\tif ( mergeLeft || mergeRight ) {\n\t\t\t// After merge elements that were marked by _insert() to be filtered might be gone so\n\t\t\t// we need to mark the new container.\n\t\t\tthis._filterAttributesOf.push( this.position.parent );\n\t\t}\n\n\t\tmergePosLeft.detach();\n\t\tmergePosRight.detach();\n\t}\n\n\t/**\n\t * Checks whether specified node can be merged with previous sibling element.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t * @returns {Boolean}\n\t */\n\t_canMergeLeft( node, context ) {\n\t\tconst previousSibling = node.previousSibling;\n\n\t\treturn context.isFirst &&\n\t\t\t( previousSibling instanceof Element ) &&\n\t\t\tthis.canMergeWith.has( previousSibling ) &&\n\t\t\tthis.model.schema.checkMerge( previousSibling, node );\n\t}\n\n\t/**\n\t * Checks whether specified node can be merged with next sibling element.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which could potentially be merged.\n\t * @param {Object} context\n\t * @returns {Boolean}\n\t */\n\t_canMergeRight( node, context ) {\n\t\tconst nextSibling = node.nextSibling;\n\n\t\treturn context.isLast &&\n\t\t\t( nextSibling instanceof Element ) &&\n\t\t\tthis.canMergeWith.has( nextSibling ) &&\n\t\t\tthis.model.schema.checkMerge( node, nextSibling );\n\t}\n\n\t/**\n\t * Tries wrapping the node in a new paragraph and inserting it this way.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node which needs to be autoparagraphed.\n\t * @param {Object} context\n\t */\n\t_tryAutoparagraphing( node, context ) {\n\t\tconst paragraph = this.writer.createElement( 'paragraph' );\n\n\t\t// Do not autoparagraph if the paragraph won't be allowed there,\n\t\t// cause that would lead to an infinite loop. The paragraph would be rejected in\n\t\t// the next _handleNode() call and we'd be here again.\n\t\tif ( this._getAllowedIn( paragraph, this.position.parent ) && this.schema.checkChild( paragraph, node ) ) {\n\t\t\tparagraph._appendChild( node );\n\t\t\tthis._handleNode( paragraph, context );\n\t\t}\n\t}\n\n\t/**\n\t * @private\n\t * @param {module:engine/model/node~Node} node\n\t * @returns {Boolean} Whether an allowed position was found.\n\t * `false` is returned if the node isn't allowed at any position up in the tree, `true` if was.\n\t */\n\t_checkAndSplitToAllowedPosition( node ) {\n\t\tconst allowedIn = this._getAllowedIn( node, this.position.parent );\n\n\t\tif ( !allowedIn ) {\n\t\t\treturn false;\n\t\t}\n\n\t\twhile ( allowedIn != this.position.parent ) {\n\t\t\t// If a parent which we'd need to leave is a limit element, break.\n\t\t\tif ( this.schema.isLimit( this.position.parent ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\n\t\t\tif ( this.position.isAtStart ) {\n\t\t\t\t// If insertion position is at the beginning of the parent, move it out instead of splitting.\n\t\t\t\t// <p>^Foo</p> -> ^<p>Foo</p>\n\t\t\t\tconst parent = this.position.parent;\n\n\t\t\t\tthis.position = this.writer.createPositionBefore( parent );\n\n\t\t\t\t// Special case – parent is empty (<p>^</p>).\n\t\t\t\t//\n\t\t\t\t// 1. parent.isEmpty\n\t\t\t\t// We can remove the element after moving insertion position out of it.\n\t\t\t\t//\n\t\t\t\t// 2. parent.parent === allowedIn\n\t\t\t\t// However parent should remain in place when allowed element is above limit element in document tree.\n\t\t\t\t// For example there shouldn't be allowed to remove empty paragraph from tableCell, when is pasted\n\t\t\t\t// content allowed in $root.\n\t\t\t\tif ( parent.isEmpty && parent.parent === allowedIn ) {\n\t\t\t\t\tthis.writer.remove( parent );\n\t\t\t\t}\n\t\t\t} else if ( this.position.isAtEnd ) {\n\t\t\t\t// If insertion position is at the end of the parent, move it out instead of splitting.\n\t\t\t\t// <p>Foo^</p> -> <p>Foo</p>^\n\t\t\t\tthis.position = this.writer.createPositionAfter( this.position.parent );\n\t\t\t} else {\n\t\t\t\tconst tempPos = this.writer.createPositionAfter( this.position.parent );\n\n\t\t\t\tthis._setAffectedBoundaries( this.position );\n\t\t\t\tthis.writer.split( this.position );\n\n\t\t\t\tthis.position = tempPos;\n\n\t\t\t\tthis.canMergeWith.add( this.position.nodeAfter );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Gets the element in which the given node is allowed. It checks the passed element and all its ancestors.\n\t *\n\t * @private\n\t * @param {module:engine/model/node~Node} node The node to check.\n\t * @param {module:engine/model/element~Element} element The element in which the node's correctness should be checked.\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\t_getAllowedIn( node, element ) {\n\t\tif ( this.schema.checkChild( element, node ) ) {\n\t\t\treturn element;\n\t\t}\n\n\t\tif ( element.parent ) {\n\t\t\treturn this._getAllowedIn( node, element.parent );\n\t\t}\n\n\t\treturn null;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/deletecontent\n */\n\nimport LivePosition from '../liveposition';\nimport Range from '../range';\nimport DocumentSelection from '../documentselection';\n\n/**\n * Deletes content of the selection and merge siblings. The resulting selection is always collapsed.\n *\n * **Note:** Use {@link module:engine/model/model~Model#deleteContent} instead of this function.\n * This function is only exposed to be reusable in algorithms\n * which change the {@link module:engine/model/model~Model#deleteContent}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which the insertion\n * should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * Selection of which the content should be deleted.\n * @param {Object} [options]\n * @param {Boolean} [options.leaveUnmerged=false] Whether to merge elements after removing the content of the selection.\n *\n * For example `<heading>x[x</heading><paragraph>y]y</paragraph>` will become:\n *\n * * `<heading>x^y</heading>` with the option disabled (`leaveUnmerged == false`)\n * * `<heading>x^</heading><paragraph>y</paragraph>` with enabled (`leaveUnmerged == true`).\n *\n * Note: {@link module:engine/model/schema~Schema#isObject object} and {@link module:engine/model/schema~Schema#isLimit limit}\n * elements will not be merged.\n *\n * @param {Boolean} [options.doNotResetEntireContent=false] Whether to skip replacing the entire content with a\n * paragraph when the entire content was selected.\n *\n * For example `<heading>[x</heading><paragraph>y]</paragraph>` will become:\n *\n * * `<paragraph>^</paragraph>` with the option disabled (`doNotResetEntireContent == false`)\n * * `<heading>^</heading>` with enabled (`doNotResetEntireContent == true`).\n *\n * @param {Boolean} [options.doNotAutoparagraph=false] Whether to create a paragraph if after content deletion selection is moved\n * to a place where text cannot be inserted.\n *\n * For example `<paragraph>x</paragraph>[<image src=\"foo.jpg\"></image>]` will become:\n *\n * * `<paragraph>x</paragraph><paragraph>[]</paragraph>` with the option disabled (`doNotAutoparagraph == false`)\n * * `<paragraph>x[]</paragraph>` with the option enabled (`doNotAutoparagraph == true`).\n *\n * **Note:** if there is no valid position for the selection, the paragraph will always be created:\n *\n * `[<image src=\"foo.jpg\"></image>]` -> `<paragraph>[]</paragraph>`.\n */\nexport default function deleteContent( model, selection, options = {} ) {\n\tif ( selection.isCollapsed ) {\n\t\treturn;\n\t}\n\n\tconst selRange = selection.getFirstRange();\n\n\t// If the selection is already removed, don't do anything.\n\tif ( selRange.root.rootName == '$graveyard' ) {\n\t\treturn;\n\t}\n\n\tconst schema = model.schema;\n\n\tmodel.change( writer => {\n\t\t// 1. Replace the entire content with paragraph.\n\t\t// See: https://github.com/ckeditor/ckeditor5-engine/issues/1012#issuecomment-315017594.\n\t\tif ( !options.doNotResetEntireContent && shouldEntireContentBeReplacedWithParagraph( schema, selection ) ) {\n\t\t\treplaceEntireContentWithParagraph( writer, selection, schema );\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst startPos = selRange.start;\n\t\tconst endPos = LivePosition.fromPosition( selRange.end, 'toNext' );\n\n\t\t// 2. Remove the content if there is any.\n\t\tif ( !selRange.start.isTouching( selRange.end ) ) {\n\t\t\twriter.remove( selRange );\n\t\t}\n\n\t\t// 3. Merge elements in the right branch to the elements in the left branch.\n\t\t// The only reasonable (in terms of data and selection correctness) case in which we need to do that is:\n\t\t//\n\t\t// <heading type=1>Fo[</heading><paragraph>]ar</paragraph> => <heading type=1>Fo^ar</heading>\n\t\t//\n\t\t// However, the algorithm supports also merging deeper structures (up to the depth of the shallower branch),\n\t\t// as it's hard to imagine what should actually be the default behavior. Usually, specific features will\n\t\t// want to override that behavior anyway.\n\t\tif ( !options.leaveUnmerged ) {\n\t\t\tmergeBranches( writer, startPos, endPos );\n\n\t\t\t// TMP this will be replaced with a postfixer.\n\t\t\t// We need to check and strip disallowed attributes in all nested nodes because after merge\n\t\t\t// some attributes could end up in a path where are disallowed.\n\t\t\t//\n\t\t\t// e.g. bold is disallowed for <H1>\n\t\t\t// <h1>Fo{o</h1><p>b}a<b>r</b><p> -> <h1>Fo{}a<b>r</b><h1> -> <h1>Fo{}ar<h1>.\n\t\t\tschema.removeDisallowedAttributes( startPos.parent.getChildren(), writer );\n\t\t}\n\n\t\tcollapseSelectionAt( writer, selection, startPos );\n\n\t\t// 4. Add a paragraph to set selection in it.\n\t\t// Check if a text is allowed in the new container. If not, try to create a new paragraph (if it's allowed here).\n\t\tif ( shouldAutoparagraph( schema, startPos ) ) {\n\t\t\t// If auto-paragraphing is off, find the closest valid selection range and collapse the selection there.\n\t\t\t// If there is no valid selection range, create paragraph anyway and set selection there.\n\t\t\tconst validSelectionRange = schema.getNearestSelectionRange( startPos );\n\n\t\t\tif ( options.doNotAutoparagraph && validSelectionRange ) {\n\t\t\t\tcollapseSelectionAt( writer, selection, validSelectionRange );\n\t\t\t} else {\n\t\t\t\tinsertParagraph( writer, startPos, selection );\n\t\t\t}\n\t\t}\n\n\t\tendPos.detach();\n\t} );\n}\n\n// This function is a result of reaching the Ballmer's peak for just the right amount of time.\n// Even I had troubles documenting it after a while and after reading it again I couldn't believe that it really works.\nfunction mergeBranches( writer, startPos, endPos ) {\n\tconst startParent = startPos.parent;\n\tconst endParent = endPos.parent;\n\n\t// If both positions ended up in the same parent, then there's nothing more to merge:\n\t// <$root><p>x[]</p><p>{}y</p></$root> => <$root><p>xy</p>[]{}</$root>\n\tif ( startParent == endParent ) {\n\t\treturn;\n\t}\n\n\t// If one of the positions is a limit element, then there's nothing to merge because we don't want to cross the limit boundaries.\n\tif ( writer.model.schema.isLimit( startParent ) || writer.model.schema.isLimit( endParent ) ) {\n\t\treturn;\n\t}\n\n\t// Check if operations we'll need to do won't need to cross object or limit boundaries.\n\t// E.g., we can't merge endParent into startParent in this case:\n\t// <limit><startParent>x[]</startParent></limit><endParent>{}</endParent>\n\tif ( !checkCanBeMerged( startPos, endPos, writer.model.schema ) ) {\n\t\treturn;\n\t}\n\n\t// Remember next positions to merge. For example:\n\t// <a><b>x[]</b></a><c><d>{}y</d></c>\n\t// will become:\n\t// <a><b>xy</b>[]</a><c>{}</c>\n\tstartPos = writer.createPositionAfter( startParent );\n\tendPos = writer.createPositionBefore( endParent );\n\n\tif ( !endPos.isEqual( startPos ) ) {\n\t\t// In this case, before we merge, we need to move `endParent` to the `startPos`:\n\t\t// <a><b>x[]</b></a><c><d>{}y</d></c>\n\t\t// becomes:\n\t\t// <a><b>x</b>[]<d>y</d></a><c>{}</c>\n\t\twriter.insert( endParent, startPos );\n\t}\n\n\t// Merge two siblings:\n\t// <a>x</a>[]<b>y</b> -> <a>xy</a> (the usual case)\n\t// <a><b>x</b>[]<d>y</d></a><c></c> -> <a><b>xy</b>[]</a><c></c> (this is the \"move parent\" case shown above)\n\twriter.merge( startPos );\n\n\t// Remove empty end ancestors:\n\t// <a>fo[o</a><b><a><c>bar]</c></a></b>\n\t// becomes:\n\t// <a>fo[]</a><b><a>{}</a></b>\n\t// So we can remove <a> and <b>.\n\twhile ( endPos.parent.isEmpty ) {\n\t\tconst parentToRemove = endPos.parent;\n\n\t\tendPos = writer.createPositionBefore( parentToRemove );\n\n\t\twriter.remove( parentToRemove );\n\t}\n\n\t// Continue merging next level.\n\tmergeBranches( writer, startPos, endPos );\n}\n\nfunction shouldAutoparagraph( schema, position ) {\n\tconst isTextAllowed = schema.checkChild( position, '$text' );\n\tconst isParagraphAllowed = schema.checkChild( position, 'paragraph' );\n\n\treturn !isTextAllowed && isParagraphAllowed;\n}\n\n// Check if parents of two positions can be merged by checking if there are no limit/object\n// boundaries between those two positions.\n//\n// E.g. in <bQ><p>x[]</p></bQ><widget><caption>{}</caption></widget>\n// we'll check <p>, <bQ>, <widget> and <caption>.\n// Usually, widget and caption are marked as objects/limits in the schema, so in this case merging will be blocked.\nfunction checkCanBeMerged( leftPos, rightPos, schema ) {\n\tconst rangeToCheck = new Range( leftPos, rightPos );\n\n\tfor ( const value of rangeToCheck.getWalker() ) {\n\t\tif ( schema.isLimit( value.item ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\treturn true;\n}\n\nfunction insertParagraph( writer, position, selection ) {\n\tconst paragraph = writer.createElement( 'paragraph' );\n\n\twriter.insert( paragraph, position );\n\n\tcollapseSelectionAt( writer, selection, writer.createPositionAt( paragraph, 0 ) );\n}\n\nfunction replaceEntireContentWithParagraph( writer, selection ) {\n\tconst limitElement = writer.model.schema.getLimitElement( selection );\n\n\twriter.remove( writer.createRangeIn( limitElement ) );\n\tinsertParagraph( writer, writer.createPositionAt( limitElement, 0 ), selection );\n}\n\n// We want to replace the entire content with a paragraph when:\n// * the entire content is selected,\n// * selection contains at least two elements,\n// * whether the paragraph is allowed in schema in the common ancestor.\nfunction shouldEntireContentBeReplacedWithParagraph( schema, selection ) {\n\tconst limitElement = schema.getLimitElement( selection );\n\n\tif ( !selection.containsEntireContent( limitElement ) ) {\n\t\treturn false;\n\t}\n\n\tconst range = selection.getFirstRange();\n\n\tif ( range.start.parent == range.end.parent ) {\n\t\treturn false;\n\t}\n\n\treturn schema.checkChild( limitElement, 'paragraph' );\n}\n\n// Helper function that sets the selection. Depending whether given `selection` is a document selection or not,\n// uses a different method to set it.\nfunction collapseSelectionAt( writer, selection, positionOrRange ) {\n\tif ( selection instanceof DocumentSelection ) {\n\t\twriter.setSelection( positionOrRange );\n\t} else {\n\t\tselection.setTo( positionOrRange );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/modifyselection\n */\n\nimport Position from '../position';\nimport TreeWalker from '../treewalker';\nimport Range from '../range';\nimport { isInsideSurrogatePair, isInsideCombinedSymbol } from '@ckeditor/ckeditor5-utils/src/unicode';\nimport DocumentSelection from '../documentselection';\n\nconst wordBoundaryCharacters = ' ,.?!:;\"-()';\n\n/**\n * Modifies the selection. Currently, the supported modifications are:\n *\n * * Extending. The selection focus is moved in the specified `options.direction` with a step specified in `options.unit`.\n * Possible values for `unit` are:\n * * `'character'` (default) - moves selection by one user-perceived character. In most cases this means moving by one\n * character in `String` sense. However, unicode also defines \"combing marks\". These are special symbols, that combines\n * with a symbol before it (\"base character\") to create one user-perceived character. For example, `q̣̇` is a normal\n * letter `q` with two \"combining marks\": upper dot (`Ux0307`) and lower dot (`Ux0323`). For most actions, i.e. extending\n * selection by one position, it is correct to include both \"base character\" and all of it's \"combining marks\". That is\n * why `'character'` value is most natural and common method of modifying selection.\n * * `'codePoint'` - moves selection by one unicode code point. In contrary to, `'character'` unit, this will insert\n * selection between \"base character\" and \"combining mark\", because \"combining marks\" have their own unicode code points.\n * However, for technical reasons, unicode code points with values above `UxFFFF` are represented in native `String` by\n * two characters, called \"surrogate pairs\". Halves of \"surrogate pairs\" have a meaning only when placed next to each other.\n * For example `𨭎` is represented in `String` by `\\uD862\\uDF4E`. Both `\\uD862` and `\\uDF4E` do not have any meaning\n * outside the pair (are rendered as ? when alone). Position between them would be incorrect. In this case, selection\n * extension will include whole \"surrogate pair\".\n * * `'word'` - moves selection by a whole word.\n *\n * **Note:** if you extend a forward selection in a backward direction you will in fact shrink it.\n *\n * **Note:** Use {@link module:engine/model/model~Model#modifySelection} instead of this function.\n * This function is only exposed to be reusable in algorithms\n * which change the {@link module:engine/model/model~Model#modifySelection}\n * method's behavior.\n *\n * @param {module:engine/model/model~Model} model The model in context of which\n * the selection modification should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection to modify.\n * @param {Object} [options]\n * @param {'forward'|'backward'} [options.direction='forward'] The direction in which the selection should be modified.\n * @param {'character'|'codePoint'|'word'} [options.unit='character'] The unit by which selection should be modified.\n */\nexport default function modifySelection( model, selection, options = {} ) {\n\tconst schema = model.schema;\n\tconst isForward = options.direction != 'backward';\n\tconst unit = options.unit ? options.unit : 'character';\n\n\tconst focus = selection.focus;\n\n\tconst walker = new TreeWalker( {\n\t\tboundaries: getSearchRange( focus, isForward ),\n\t\tsingleCharacters: true,\n\t\tdirection: isForward ? 'forward' : 'backward'\n\t} );\n\n\tconst data = { walker, schema, isForward, unit };\n\n\tlet next;\n\n\twhile ( ( next = walker.next() ) ) {\n\t\tif ( next.done ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = tryExtendingTo( data, next.value );\n\n\t\tif ( position ) {\n\t\t\tif ( selection instanceof DocumentSelection ) {\n\t\t\t\tmodel.change( writer => {\n\t\t\t\t\twriter.setSelectionFocus( position );\n\t\t\t\t} );\n\t\t\t} else {\n\t\t\t\tselection.setFocus( position );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\t}\n}\n\n// Checks whether the selection can be extended to the the walker's next value (next position).\n// @param {{ walker, unit, isForward, schema }} data\n// @param {module:engine/view/treewalker~TreeWalkerValue} value\nfunction tryExtendingTo( data, value ) {\n\t// If found text, we can certainly put the focus in it. Let's just find a correct position\n\t// based on the unit.\n\tif ( value.type == 'text' ) {\n\t\tif ( data.unit === 'word' ) {\n\t\t\treturn getCorrectWordBreakPosition( data.walker, data.isForward );\n\t\t}\n\n\t\treturn getCorrectPosition( data.walker, data.unit, data.isForward );\n\t}\n\n\t// Entering an element.\n\tif ( value.type == ( data.isForward ? 'elementStart' : 'elementEnd' ) ) {\n\t\t// If it's an object, we can select it now.\n\t\tif ( data.schema.isObject( value.item ) ) {\n\t\t\treturn Position._createAt( value.item, data.isForward ? 'after' : 'before' );\n\t\t}\n\n\t\t// If text allowed on this position, extend to this place.\n\t\tif ( data.schema.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\treturn value.nextPosition;\n\t\t}\n\t}\n\t// Leaving an element.\n\telse {\n\t\t// If leaving a limit element, stop.\n\t\tif ( data.schema.isLimit( value.item ) ) {\n\t\t\t// NOTE: Fast-forward the walker until the end.\n\t\t\tdata.walker.skip( () => true );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// If text allowed on this position, extend to this place.\n\t\tif ( data.schema.checkChild( value.nextPosition, '$text' ) ) {\n\t\t\treturn value.nextPosition;\n\t\t}\n\t}\n}\n\n// Finds a correct position by walking in a text node and checking whether selection can be extended to given position\n// or should be extended further.\n//\n// @param {module:engine/model/treewalker~TreeWalker} walker\n// @param {String} unit The unit by which selection should be modified.\nfunction getCorrectPosition( walker, unit ) {\n\tconst textNode = walker.position.textNode;\n\n\tif ( textNode ) {\n\t\tconst data = textNode.data;\n\t\tlet offset = walker.position.offset - textNode.startOffset;\n\n\t\twhile ( isInsideSurrogatePair( data, offset ) || ( unit == 'character' && isInsideCombinedSymbol( data, offset ) ) ) {\n\t\t\twalker.next();\n\n\t\t\toffset = walker.position.offset - textNode.startOffset;\n\t\t}\n\t}\n\n\treturn walker.position;\n}\n\n// Finds a correct position of a word break by walking in a text node and checking whether selection can be extended to given position\n// or should be extended further.\n//\n// @param {module:engine/model/treewalker~TreeWalker} walker\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction getCorrectWordBreakPosition( walker, isForward ) {\n\tlet textNode = walker.position.textNode;\n\n\tif ( textNode ) {\n\t\tlet offset = walker.position.offset - textNode.startOffset;\n\n\t\twhile ( !isAtWordBoundary( textNode.data, offset, isForward ) && !isAtNodeBoundary( textNode, offset, isForward ) ) {\n\t\t\twalker.next();\n\n\t\t\t// Check of adjacent text nodes with different attributes (like BOLD).\n\t\t\t// Example : 'foofoo []bar<$text bold=\"true\">bar</$text> bazbaz'\n\t\t\t// should expand to : 'foofoo [bar<$text bold=\"true\">bar</$text>] bazbaz'.\n\t\t\tconst nextNode = isForward ? walker.position.nodeAfter : walker.position.nodeBefore;\n\n\t\t\t// Scan only text nodes. Ignore inline elements (like `<softBreak>`).\n\t\t\tif ( nextNode && nextNode.is( 'text' ) ) {\n\t\t\t\t// Check boundary char of an adjacent text node.\n\t\t\t\tconst boundaryChar = nextNode.data.charAt( isForward ? 0 : nextNode.data.length - 1 );\n\n\t\t\t\t// Go to the next node if the character at the boundary of that node belongs to the same word.\n\t\t\t\tif ( !wordBoundaryCharacters.includes( boundaryChar ) ) {\n\t\t\t\t\t// If adjacent text node belongs to the same word go to it & reset values.\n\t\t\t\t\twalker.next();\n\n\t\t\t\t\ttextNode = walker.position.textNode;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\toffset = walker.position.offset - textNode.startOffset;\n\t\t}\n\t}\n\n\treturn walker.position;\n}\n\nfunction getSearchRange( start, isForward ) {\n\tconst root = start.root;\n\tconst searchEnd = Position._createAt( root, isForward ? 'end' : 0 );\n\n\tif ( isForward ) {\n\t\treturn new Range( start, searchEnd );\n\t} else {\n\t\treturn new Range( searchEnd, start );\n\t}\n}\n\n// Checks if selection is on word boundary.\n//\n// @param {String} data The text node value to investigate.\n// @param {Number} offset Position offset.\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction isAtWordBoundary( data, offset, isForward ) {\n\t// The offset to check depends on direction.\n\tconst offsetToCheck = offset + ( isForward ? 0 : -1 );\n\n\treturn wordBoundaryCharacters.includes( data.charAt( offsetToCheck ) );\n}\n\n// Checks if selection is on node boundary.\n//\n// @param {module:engine/model/text~Text} textNode The text node to investigate.\n// @param {Number} offset Position offset.\n// @param {Boolean} isForward Is the direction in which the selection should be modified is forward.\nfunction isAtNodeBoundary( textNode, offset, isForward ) {\n\treturn offset === ( isForward ? textNode.endOffset : 0 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/getselectedcontent\n */\n\n/**\n * Gets a clone of the selected content.\n *\n * For example, for the following selection:\n *\n * ```html\n * <p>x</p><quote><p>y</p><h>fir[st</h></quote><p>se]cond</p><p>z</p>\n * ```\n *\n * It will return a document fragment with such a content:\n *\n * ```html\n * <quote><h>st</h></quote><p>se</p>\n * ```\n *\n * @param {module:engine/model/model~Model} model The model in context of which\n * the selection modification should be performed.\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection of which content will be returned.\n * @returns {module:engine/model/documentfragment~DocumentFragment}\n */\nexport default function getSelectedContent( model, selection ) {\n\treturn model.change( writer => {\n\t\tconst frag = writer.createDocumentFragment();\n\t\tconst range = selection.getFirstRange();\n\n\t\tif ( !range || range.isCollapsed ) {\n\t\t\treturn frag;\n\t\t}\n\n\t\tconst root = range.start.root;\n\t\tconst commonPath = range.start.getCommonPath( range.end );\n\t\tconst commonParent = root.getNodeByPath( commonPath );\n\n\t\t// ## 1st step\n\t\t//\n\t\t// First, we'll clone a fragment represented by a minimal flat range\n\t\t// containing the original range to be cloned.\n\t\t// E.g. let's consider such a range:\n\t\t//\n\t\t// <p>x</p><quote><p>y</p><h>fir[st</h></quote><p>se]cond</p><p>z</p>\n\t\t//\n\t\t// A minimal flat range containing this one is:\n\t\t//\n\t\t// <p>x</p>[<quote><p>y</p><h>first</h></quote><p>second</p>]<p>z</p>\n\t\t//\n\t\t// We can easily clone this structure, preserving e.g. the <quote> element.\n\t\tlet flatSubtreeRange;\n\n\t\tif ( range.start.parent == range.end.parent ) {\n\t\t\t// The original range is flat, so take it.\n\t\t\tflatSubtreeRange = range;\n\t\t} else {\n\t\t\tflatSubtreeRange = writer.createRange(\n\t\t\t\twriter.createPositionAt( commonParent, range.start.path[ commonPath.length ] ),\n\t\t\t\twriter.createPositionAt( commonParent, range.end.path[ commonPath.length ] + 1 )\n\t\t\t);\n\t\t}\n\n\t\tconst howMany = flatSubtreeRange.end.offset - flatSubtreeRange.start.offset;\n\n\t\t// Clone the whole contents.\n\t\tfor ( const item of flatSubtreeRange.getItems( { shallow: true } ) ) {\n\t\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\t\twriter.appendText( item.data, item.getAttributes(), frag );\n\t\t\t} else {\n\t\t\t\twriter.append( item._clone( true ), frag );\n\t\t\t}\n\t\t}\n\n\t\t// ## 2nd step\n\t\t//\n\t\t// If the original range wasn't flat, then we need to remove the excess nodes from the both ends of the cloned fragment.\n\t\t//\n\t\t// For example, for the range shown in the 1st step comment, we need to remove these pieces:\n\t\t//\n\t\t// <quote>[<p>y</p>]<h>[fir]st</h></quote><p>se[cond]</p>\n\t\t//\n\t\t// So this will be the final copied content:\n\t\t//\n\t\t// <quote><h>st</h></quote><p>se</p>\n\t\t//\n\t\t// In order to do that, we remove content from these two ranges:\n\t\t//\n\t\t// [<quote><p>y</p><h>fir]st</h></quote><p>se[cond</p>]\n\t\tif ( flatSubtreeRange != range ) {\n\t\t\t// Find the position of the original range in the cloned fragment.\n\t\t\tconst newRange = range._getTransformedByMove( flatSubtreeRange.start, writer.createPositionAt( frag, 0 ), howMany )[ 0 ];\n\n\t\t\tconst leftExcessRange = writer.createRange( writer.createPositionAt( frag, 0 ), newRange.start );\n\t\t\tconst rightExcessRange = writer.createRange( newRange.end, writer.createPositionAt( frag, 'end' ) );\n\n\t\t\tremoveRangeContent( rightExcessRange, writer );\n\t\t\tremoveRangeContent( leftExcessRange, writer );\n\t\t}\n\n\t\treturn frag;\n\t} );\n}\n\n// After https://github.com/ckeditor/ckeditor5-engine/issues/690 is fixed,\n// this function will, most likely, be able to rewritten using getMinimalFlatRanges().\nfunction removeRangeContent( range, writer ) {\n\tconst parentsToCheck = [];\n\n\tArray.from( range.getItems( { direction: 'backward' } ) )\n\t\t// We should better store ranges because text proxies will lose integrity\n\t\t// with the text nodes when we'll start removing content.\n\t\t.map( item => writer.createRangeOn( item ) )\n\t\t// Filter only these items which are fully contained in the passed range.\n\t\t//\n\t\t// E.g. for the following range: [<quote><p>y</p><h>fir]st</h>\n\t\t// the walker will return the entire <h> element, when only the \"fir\" item inside it is fully contained.\n\t\t.filter( itemRange => {\n\t\t\t// We should be able to use Range.containsRange, but https://github.com/ckeditor/ckeditor5-engine/issues/691.\n\t\t\tconst contained =\n\t\t\t\t( itemRange.start.isAfter( range.start ) || itemRange.start.isEqual( range.start ) ) &&\n\t\t\t\t( itemRange.end.isBefore( range.end ) || itemRange.end.isEqual( range.end ) );\n\n\t\t\treturn contained;\n\t\t} )\n\t\t.forEach( itemRange => {\n\t\t\tparentsToCheck.push( itemRange.start.parent );\n\n\t\t\twriter.remove( itemRange );\n\t\t} );\n\n\t// Remove ancestors of the removed items if they turned to be empty now\n\t// (their whole content was contained in the range).\n\tparentsToCheck.forEach( parentToCheck => {\n\t\tlet parent = parentToCheck;\n\n\t\twhile ( parent.parent && parent.isEmpty ) {\n\t\t\tconst removeRange = writer.createRangeOn( parent );\n\n\t\t\tparent = parent.parent;\n\n\t\t\twriter.remove( removeRange );\n\t\t}\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/utils/selection-post-fixer\n */\n\nimport Range from '../range';\nimport Position from '../position';\n\n/**\n * Injects selection post-fixer to the model.\n *\n * The role of the selection post-fixer is to ensure that the selection is in a correct place\n * after a {@link module:engine/model/model~Model#change `change()`} block was executed.\n *\n * The correct position means that:\n *\n * * All collapsed selection ranges are in a place where the {@link module:engine/model/schema~Schema}\n * allows a `$text`.\n * * None of the selection's non-collapsed ranges crosses a {@link module:engine/model/schema~Schema#isLimit limit element}\n * boundary (a range must be rooted within one limit element).\n * * Only {@link module:engine/model/schema~Schema#isObject object elements} can be selected from the outside\n * (e.g. `[<paragraph>foo</paragraph>]` is invalid). This rule applies independently to both selection ends, so this\n * selection is correct: `<paragraph>f[oo</paragraph><image></image>]`.\n *\n * If the position is not correct, the post-fixer will automatically correct it.\n *\n * ## Fixing a non-collapsed selection\n *\n * See as an example a selection that starts in a P1 element and ends inside the text of a TD element\n * (`[` and `]` are range boundaries and `(l)` denotes an element defined as `isLimit=true`):\n *\n *\t\troot\n *\t\t |- element P1\n *\t\t | |- \"foo\" root\n *\t\t |- element TABLE (l) P1 TABLE P2\n *\t\t | |- element TR (l) f o[o TR TR b a r\n *\t\t | | |- element TD (l) TD TD\n *\t\t | | |- \"aaa\" a]a a b b b\n *\t\t | |- element TR (l)\n *\t\t | | |- element TD (l) ||\n *\t\t | | |- \"bbb\" ||\n *\t\t |- element P2 VV\n *\t\t | |- \"bar\"\n *\t\t root\n *\t\t P1 TABLE] P2\n *\t\t f o[o TR TR b a r\n *\t\t TD TD\n *\t\t a a a b b b\n *\n * In the example above, the TABLE, TR and TD are defined as `isLimit=true` in the schema. The range which is not contained within\n * a single limit element must be expanded to select the outermost limit element. The range end is inside the text node of the TD element.\n * As the TD element is a child of the TR and TABLE elements, where both are defined as `isLimit=true` in the schema, the range must be\n * expanded to select the whole TABLE element.\n *\n * **Note** If the selection contains multiple ranges, the method returns a minimal set of ranges that are not intersecting after expanding\n * them to select `isLimit=true` elements.\n *\n * @param {module:engine/model/model~Model} model\n */\nexport function injectSelectionPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => selectionPostFixer( writer, model ) );\n}\n\n// The selection post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction selectionPostFixer( writer, model ) {\n\tconst selection = model.document.selection;\n\tconst schema = model.schema;\n\n\tconst ranges = [];\n\n\tlet wasFixed = false;\n\n\tfor ( const modelRange of selection.getRanges() ) {\n\t\t// Go through all ranges in selection and try fixing each of them.\n\t\t// Those ranges might overlap but will be corrected later.\n\t\tconst correctedRange = tryFixingRange( modelRange, schema );\n\n\t\tif ( correctedRange ) {\n\t\t\tranges.push( correctedRange );\n\t\t\twasFixed = true;\n\t\t} else {\n\t\t\tranges.push( modelRange );\n\t\t}\n\t}\n\n\t// If any of ranges were corrected update the selection.\n\tif ( wasFixed ) {\n\t\t// The above algorithm might create ranges that intersects each other when selection contains more then one range.\n\t\t// This is case happens mostly on Firefox which creates multiple ranges for selected table.\n\t\tlet fixedRanges = ranges;\n\n\t\t// Fixing selection with many ranges usually breaks the selection in Firefox. As only Firefox supports multiple selection ranges\n\t\t// we simply create one continuous range from fixed selection ranges (even if they are not adjacent).\n\t\tif ( ranges.length > 1 ) {\n\t\t\tconst selectionStart = ranges[ 0 ].start;\n\t\t\tconst selectionEnd = ranges[ ranges.length - 1 ].end;\n\n\t\t\tfixedRanges = [ new Range( selectionStart, selectionEnd ) ];\n\t\t}\n\n\t\twriter.setSelection( fixedRanges, { backward: selection.isBackward } );\n\t}\n}\n\n// Tries fixing a range if it's incorrect.\n//\n// @param {module:engine/model/range~Range} range\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingRange( range, schema ) {\n\tif ( range.isCollapsed ) {\n\t\treturn tryFixingCollapsedRange( range, schema );\n\t}\n\n\treturn tryFixingNonCollapsedRage( range, schema );\n}\n\n// Tries to fix collapsed ranges.\n//\n// * Fixes situation when a range is in a place where $text is not allowed\n//\n// @param {module:engine/model/range~Range} range Collapsed range to fix.\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingCollapsedRange( range, schema ) {\n\tconst originalPosition = range.start;\n\n\tconst nearestSelectionRange = schema.getNearestSelectionRange( originalPosition );\n\n\t// This might be null ie when editor data is empty.\n\t// In such cases there is no need to fix the selection range.\n\tif ( !nearestSelectionRange ) {\n\t\treturn null;\n\t}\n\n\tconst fixedPosition = nearestSelectionRange.start;\n\n\t// Fixed position is the same as original - no need to return corrected range.\n\tif ( originalPosition.isEqual( fixedPosition ) ) {\n\t\treturn null;\n\t}\n\n\t// Check single node selection (happens in tables).\n\tif ( fixedPosition.nodeAfter && schema.isLimit( fixedPosition.nodeAfter ) ) {\n\t\treturn new Range( fixedPosition, Position._createAfter( fixedPosition.nodeAfter ) );\n\t}\n\n\treturn new Range( fixedPosition );\n}\n\n// Tries to fix an expanded range.\n//\n// @param {module:engine/model/range~Range} range Expanded range to fix.\n// @param {module:engine/model/schema~Schema} schema\n// @returns {module:engine/model/range~Range|null} Returns fixed range or null if range is valid.\nfunction tryFixingNonCollapsedRage( range, schema ) {\n\tconst start = range.start;\n\tconst end = range.end;\n\n\tconst isTextAllowedOnStart = schema.checkChild( start, '$text' );\n\tconst isTextAllowedOnEnd = schema.checkChild( end, '$text' );\n\n\tconst startLimitElement = schema.getLimitElement( start );\n\tconst endLimitElement = schema.getLimitElement( end );\n\n\t// Ranges which both end are inside the same limit element (or root) might needs only minor fix.\n\tif ( startLimitElement === endLimitElement ) {\n\t\t// Range is valid when both position allows to place a text:\n\t\t// - <block>f[oobarba]z</block>\n\t\t// This would be \"fixed\" by a next check but as it will be the same it's better to return null so the selection stays the same.\n\t\tif ( isTextAllowedOnStart && isTextAllowedOnEnd ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Range that is on non-limit element (or is partially) must be fixed so it is placed inside the block around $text:\n\t\t// - [<block>foo</block>] -> <block>[foo]</block>\n\t\t// - [<block>foo]</block> -> <block>[foo]</block>\n\t\t// - <block>f[oo</block>] -> <block>f[oo]</block>\n\t\t// - [<block>foo</block><object></object>] -> <block>[foo</block><object></object>]\n\t\tif ( checkSelectionOnNonLimitElements( start, end, schema ) ) {\n\t\t\tconst isStartObject = start.nodeAfter && schema.isObject( start.nodeAfter );\n\t\t\tconst fixedStart = isStartObject ? null : schema.getNearestSelectionRange( start, 'forward' );\n\n\t\t\tconst isEndObject = end.nodeBefore && schema.isObject( end.nodeBefore );\n\t\t\tconst fixedEnd = isEndObject ? null : schema.getNearestSelectionRange( end, 'backward' );\n\n\t\t\t// The schema.getNearestSelectionRange might return null - if that happens use original position.\n\t\t\tconst rangeStart = fixedStart ? fixedStart.start : start;\n\t\t\tconst rangeEnd = fixedEnd ? fixedEnd.start : end;\n\n\t\t\treturn new Range( rangeStart, rangeEnd );\n\t\t}\n\t}\n\n\tconst isStartInLimit = startLimitElement && !startLimitElement.is( 'rootElement' );\n\tconst isEndInLimit = endLimitElement && !endLimitElement.is( 'rootElement' );\n\n\t// At this point we eliminated valid positions on text nodes so if one of range positions is placed inside a limit element\n\t// then the range crossed limit element boundaries and needs to be fixed.\n\tif ( isStartInLimit || isEndInLimit ) {\n\t\tconst bothInSameParent = ( start.nodeAfter && end.nodeBefore ) && start.nodeAfter.parent === end.nodeBefore.parent;\n\n\t\tconst expandStart = isStartInLimit && ( !bothInSameParent || !isInObject( start.nodeAfter, schema ) );\n\t\tconst expandEnd = isEndInLimit && ( !bothInSameParent || !isInObject( end.nodeBefore, schema ) );\n\n\t\t// Although we've already found limit element on start/end positions we must find the outer-most limit element.\n\t\t// as limit elements might be nested directly inside (ie table > tableRow > tableCell).\n\t\tlet fixedStart = start;\n\t\tlet fixedEnd = end;\n\n\t\tif ( expandStart ) {\n\t\t\tfixedStart = Position._createBefore( findOutermostLimitAncestor( startLimitElement, schema ) );\n\t\t}\n\n\t\tif ( expandEnd ) {\n\t\t\tfixedEnd = Position._createAfter( findOutermostLimitAncestor( endLimitElement, schema ) );\n\t\t}\n\n\t\treturn new Range( fixedStart, fixedEnd );\n\t}\n\n\t// Range was not fixed at this point so it is valid - ie it was placed around limit element already.\n\treturn null;\n}\n\n// Finds the outer-most ancestor.\n//\n// @param {module:engine/model/node~Node} startingNode\n// @param {module:engine/model/schema~Schema} schema\n// @param {String} expandToDirection Direction of expansion - either 'start' or 'end' of the range.\n// @returns {module:engine/model/node~Node}\nfunction findOutermostLimitAncestor( startingNode, schema ) {\n\tlet isLimitNode = startingNode;\n\tlet parent = isLimitNode;\n\n\t// Find outer most isLimit block as such blocks might be nested (ie. in tables).\n\twhile ( schema.isLimit( parent ) && parent.parent ) {\n\t\tisLimitNode = parent;\n\t\tparent = parent.parent;\n\t}\n\n\treturn isLimitNode;\n}\n\n// Checks whether any of range boundaries is placed around non-limit elements.\n//\n// @param {module:engine/model/position~Position} start\n// @param {module:engine/model/position~Position} end\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction checkSelectionOnNonLimitElements( start, end, schema ) {\n\tconst startIsOnBlock = ( start.nodeAfter && !schema.isLimit( start.nodeAfter ) ) || schema.checkChild( start, '$text' );\n\tconst endIsOnBlock = ( end.nodeBefore && !schema.isLimit( end.nodeBefore ) ) || schema.checkChild( end, '$text' );\n\n\t// We should fix such selection when one of those nodes needs fixing.\n\treturn startIsOnBlock || endIsOnBlock;\n}\n\n// Checks if node exists and if it's an object.\n//\n// @param {module:engine/model/node~Node} node\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction isInObject( node, schema ) {\n\treturn node && schema.isObject( node );\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/model\n */\n\nimport Batch from './batch';\nimport Writer from './writer';\nimport Schema from './schema';\nimport Document from './document';\nimport MarkerCollection from './markercollection';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ModelElement from './element';\nimport ModelRange from './range';\nimport ModelPosition from './position';\nimport ModelSelection from './selection';\n\nimport insertContent from './utils/insertcontent';\nimport deleteContent from './utils/deletecontent';\nimport modifySelection from './utils/modifyselection';\nimport getSelectedContent from './utils/getselectedcontent';\nimport { injectSelectionPostFixer } from './utils/selection-post-fixer';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n// @if CK_DEBUG_ENGINE // const { dumpTrees } = require( '../dev-utils/utils' );\n// @if CK_DEBUG_ENGINE // const { OperationReplayer } = require( '../dev-utils/operationreplayer' ).default;\n\n/**\n * Editor's data model. Read about the model in the\n * {@glink framework/guides/architecture/editing-engine engine architecture guide}.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Model {\n\tconstructor() {\n\t\t/**\n\t\t * Model's marker collection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/markercollection~MarkerCollection}\n\t\t */\n\t\tthis.markers = new MarkerCollection();\n\n\t\t/**\n\t\t * Model's document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/document~Document}\n\t\t */\n\t\tthis.document = new Document( this );\n\n\t\t/**\n\t\t * Model's schema.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/schema~Schema}\n\t\t */\n\t\tthis.schema = new Schema();\n\n\t\t/**\n\t\t * All callbacks added by {@link module:engine/model/model~Model#change} or\n\t\t * {@link module:engine/model/model~Model#enqueueChange} methods waiting to be executed.\n\t\t *\n\t\t * @private\n\t\t * @type {Array.<Function>}\n\t\t */\n\t\tthis._pendingChanges = [];\n\n\t\t/**\n\t\t * The last created and currently used writer instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/writer~Writer}\n\t\t */\n\t\tthis._currentWriter = null;\n\n\t\t[ 'insertContent', 'deleteContent', 'modifySelection', 'getSelectedContent', 'applyOperation' ]\n\t\t\t.forEach( methodName => this.decorate( methodName ) );\n\n\t\t// Adding operation validation with `highest` priority, so it is called before any other feature would like\n\t\t// to do anything with the operation. If the operation has incorrect parameters it should throw on the earliest occasion.\n\t\tthis.on( 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\toperation._validate();\n\t\t}, { priority: 'highest' } );\n\n\t\t// Register some default abstract entities.\n\t\tthis.schema.register( '$root', {\n\t\t\tisLimit: true\n\t\t} );\n\t\tthis.schema.register( '$block', {\n\t\t\tallowIn: '$root',\n\t\t\tisBlock: true\n\t\t} );\n\t\tthis.schema.register( '$text', {\n\t\t\tallowIn: '$block',\n\t\t\tisInline: true\n\t\t} );\n\t\tthis.schema.register( '$clipboardHolder', {\n\t\t\tallowContentOf: '$root',\n\t\t\tisLimit: true\n\t\t} );\n\t\tthis.schema.extend( '$text', { allowIn: '$clipboardHolder' } );\n\n\t\t// An element needed by the `upcastElementToMarker` converter.\n\t\t// This element temporarily represents a marker boundary during the conversion process and is removed\n\t\t// at the end of the conversion. `UpcastDispatcher` or at least `Conversion` class looks like a\n\t\t// better place for this registration but both know nothing about `Schema`.\n\t\tthis.schema.register( '$marker' );\n\t\tthis.schema.addChildCheck( ( context, childDefinition ) => {\n\t\t\tif ( childDefinition.name === '$marker' ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} );\n\n\t\tinjectSelectionPostFixer( this );\n\n\t\t// @if CK_DEBUG_ENGINE // this.on( 'applyOperation', () => {\n\t\t// @if CK_DEBUG_ENGINE // \tdumpTrees( this.document, this.document.version );\n\t\t// @if CK_DEBUG_ENGINE // }, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * The `change()` method is the primary way of changing the model. You should use it to modify all document nodes\n\t * (including detached nodes – i.e. nodes not added to the {@link module:engine/model/model~Model#document model document}),\n\t * the {@link module:engine/model/document~Document#selection document's selection}, and\n\t * {@link module:engine/model/model~Model#markers model markers}.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t} );\n\t *\n\t * All changes inside the change block use the same {@link module:engine/model/batch~Batch} so they are combined\n\t * into a single undo step.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' ); // foo.\n\t *\n\t *\t\t\tmodel.change( writer => {\n\t *\t\t\t\twriter.insertText( 'bar', paragraph, 'end' ); // foobar.\n\t *\t\t\t} );\n\t *\n\t * \t\t\twriter.insertText( 'bom', paragraph, 'end' ); // foobarbom.\n\t *\t\t} );\n\t *\n\t * The callback of the `change()` block is executed synchronously.\n\t *\n\t * You can also return a value from the change block.\n\t *\n\t *\t\tconst img = model.change( writer => {\n\t *\t\t\treturn writer.createElement( 'img' );\n\t *\t\t} );\n\t *\n\t * @see #enqueueChange\n\t * @param {Function} callback Callback function which may modify the model.\n\t * @returns {*} Value returned by the callback.\n\t */\n\tchange( callback ) {\n\t\ttry {\n\t\t\tif ( this._pendingChanges.length === 0 ) {\n\t\t\t\t// If this is the outermost block, create a new batch and start `_runPendingChanges` execution flow.\n\t\t\t\tthis._pendingChanges.push( { batch: new Batch(), callback } );\n\n\t\t\t\treturn this._runPendingChanges()[ 0 ];\n\t\t\t} else {\n\t\t\t\t// If this is not the outermost block, just execute the callback.\n\t\t\t\treturn callback( this._currentWriter );\n\t\t\t}\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * The `enqueueChange()` method performs similar task as the {@link #change `change()` method}, with two major differences.\n\t *\n\t * First, the callback of `enqueueChange()` is executed when all other enqueued changes are done. It might be executed\n\t * immediately if it is not nested in any other change block, but if it is nested in another (enqueue)change block,\n\t * it will be delayed and executed after the outermost block.\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconsole.log( 1 );\n\t *\n\t *\t\t\tmodel.enqueueChange( writer => {\n\t *\t\t\t\tconsole.log( 2 );\n\t *\t\t\t} );\n\t *\n\t * \t\t\tconsole.log( 3 );\n\t *\t\t} ); // Will log: 1, 3, 2.\n\t *\n\t * Second, it lets you define the {@link module:engine/model/batch~Batch} into which you want to add your changes.\n\t * By default, a new batch is created. In the sample above, `change` and `enqueueChange` blocks use a different\n\t * batch (and different {@link module:engine/model/writer~Writer} since each of them operates on the separate batch).\n\t *\n\t * When using the `enqueueChange()` block you can also add some changes to the batch you used before.\n\t *\n\t *\t\tmodel.enqueueChange( batch, writer => {\n\t *\t\t\twriter.insertText( 'foo', paragraph, 'end' );\n\t *\t\t} );\n\t *\n\t * The batch instance can be obtained from {@link module:engine/model/writer~Writer#batch the writer}.\n\t *\n\t * @param {module:engine/model/batch~Batch|'transparent'|'default'} batchOrType Batch or batch type should be used in the callback.\n\t * If not defined, a new batch will be created.\n\t * @param {Function} callback Callback function which may modify the model.\n\t */\n\tenqueueChange( batchOrType, callback ) {\n\t\ttry {\n\t\t\tif ( typeof batchOrType === 'string' ) {\n\t\t\t\tbatchOrType = new Batch( batchOrType );\n\t\t\t} else if ( typeof batchOrType == 'function' ) {\n\t\t\t\tcallback = batchOrType;\n\t\t\t\tbatchOrType = new Batch();\n\t\t\t}\n\n\t\t\tthis._pendingChanges.push( { batch: batchOrType, callback } );\n\n\t\t\tif ( this._pendingChanges.length == 1 ) {\n\t\t\t\tthis._runPendingChanges();\n\t\t\t}\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * {@link module:utils/observablemixin~ObservableMixin#decorate Decorated} function for applying\n\t * {@link module:engine/model/operation/operation~Operation operations} to the model.\n\t *\n\t * This is a low-level way of changing the model. It is exposed for very specific use cases (like the undo feature).\n\t * Normally, to modify the model, you will want to use {@link module:engine/model/writer~Writer `Writer`}.\n\t * See also {@glink framework/guides/architecture/editing-engine#changing-the-model Changing the model} section\n\t * of the {@glink framework/guides/architecture/editing-engine Editing architecture} guide.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation The operation to apply.\n\t */\n\tapplyOperation( operation ) {\n\t\t// @if CK_DEBUG_ENGINE // console.log( 'Applying ' + operation );\n\n\t\t// @if CK_DEBUG_ENGINE // if ( !this._operationLogs ) {\n\t\t// @if CK_DEBUG_ENGINE //\tthis._operationLogs = [];\n\t\t// @if CK_DEBUG_ENGINE // }\n\n\t\t// @if CK_DEBUG_ENGINE // this._operationLogs.push( JSON.stringify( operation ) );\n\n\t\t// @if CK_DEBUG_ENGINE //if ( !this._appliedOperations ) {\n\t\t// @if CK_DEBUG_ENGINE //\tthis._appliedOperations = [];\n\t\t// @if CK_DEBUG_ENGINE //}\n\n\t\t// @if CK_DEBUG_ENGINE //this._appliedOperations.push( operation );\n\n\t\toperation._execute();\n\t}\n\n\t// @if CK_DEBUG_ENGINE // getAppliedOperation() {\n\t// @if CK_DEBUG_ENGINE //\tif ( !this._appliedOperations ) {\n\t// @if CK_DEBUG_ENGINE //\t\treturn '';\n\t// @if CK_DEBUG_ENGINE //\t}\n\n\t// @if CK_DEBUG_ENGINE //\treturn this._appliedOperations.map( JSON.stringify ).join( '-------' );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t// @if CK_DEBUG_ENGINE // createReplayer( stringifiedOperations ) {\n\t// @if CK_DEBUG_ENGINE //\treturn new OperationReplayer( this, '-------', stringifiedOperations );\n\t// @if CK_DEBUG_ENGINE // }\n\n\t/**\n\t * Inserts content at the position in the editor specified by the selection, as one would expect the paste\n\t * functionality to work.\n\t *\n\t * This is a high-level method. It takes the {@link #schema schema} into consideration when inserting\n\t * the content, clears the given selection's content before inserting nodes and moves the selection\n\t * to its target position at the end of the process.\n\t * It can split elements, merge them, wrap bare text nodes with paragraphs, etc. — just like the\n\t * pasting feature should do.\n\t *\n\t * For lower-level methods see {@link module:engine/model/writer~Writer `Writer`}.\n\t *\n\t * This method, unlike {@link module:engine/model/writer~Writer `Writer`}'s methods, does not have to be used\n\t * inside a {@link #change `change()` block}.\n\t *\n\t * # Conversion and schema\n\t *\n\t * Inserting elements and text nodes into the model is not enough to make CKEditor 5 render that content\n\t * to the user. CKEditor 5 implements a model-view-controller architecture and what `model.insertContent()` does\n\t * is only adding nodes to the model. Additionally, you need to define\n\t * {@glink framework/guides/architecture/editing-engine#conversion converters} between the model and view\n\t * and define those nodes in the {@glink framework/guides/architecture/editing-engine#schema schema}.\n\t *\n\t * So, while this method may seem similar to CKEditor 4 `editor.insertHtml()` (in fact, both methods\n\t * are used for paste-like content insertion), the CKEditor 5 method cannot be use to insert arbitrary HTML\n\t * unless converters are defined for all elements and attributes in that HTML.\n\t *\n\t * # Examples\n\t *\n\t * Using `insertContent()` with a manually created model structure:\n\t *\n\t *\t\t// Let's create a document fragment containing such content as:\n\t *\t\t//\n\t *\t\t// <paragraph>foo</paragraph>\n\t *\t\t// <blockQuote>\n\t *\t\t// <paragraph>bar</paragraph>\n\t *\t\t// </blockQuote>\n\t *\t\tconst docFrag = editor.model.change( writer => {\n\t *\t\t\tconst p1 = writer.createElement( 'paragraph' );\n\t *\t\t\tconst p2 = writer.createElement( 'paragraph' );\n\t *\t\t\tconst blockQuote = writer.createElement( 'blockQuote' );\n\t *\t\t\tconst docFrag = writer.createDocumentFragment();\n\t *\n\t *\t\t\twriter.append( p1, docFrag );\n\t *\t\t\twriter.append( blockQuote, docFrag );\n\t *\t\t\twriter.append( p2, blockQuote );\n\t *\t\t\twriter.insertText( 'foo', p1 );\n\t *\t\t\twriter.insertText( 'bar', p2 );\n\t *\n\t *\t\t\treturn docFrag;\n\t *\t\t} );\n\t *\n\t *\t\t// insertContent() does not have to be used in a change() block. It can, though,\n\t *\t\t// so this code could be moved to the callback defined above.\n\t *\t\teditor.model.insertContent( docFrag );\n\t *\n\t * Using `insertContent()` with an HTML string converted to a model document fragment (similar to the pasting mechanism):\n\t *\n\t *\t\t// You can create your own HtmlDataProcessor instance or use editor.data.processor\n\t *\t\t// if you have not overridden the default one (which is the HtmlDataProcessor instance).\n\t *\t\tconst htmlDP = new HtmlDataProcessor();\n\t *\n\t *\t\t// Convert an HTML string to a view document fragment:\n\t *\t\tconst viewFragment = htmlDP.toView( htmlString );\n\t *\n\t *\t\t// Convert the view document fragment to a model document fragment\n\t *\t\t// in the context of $root. This conversion takes the schema into\n\t *\t\t// account so if, for example, the view document fragment contained a bare text node,\n\t *\t\t// this text node cannot be a child of $root, so it will be automatically\n\t *\t\t// wrapped with a <paragraph>. You can define the context yourself (in the second parameter),\n\t *\t\t// and e.g. convert the content like it would happen in a <paragraph>.\n\t *\t\t// Note: The clipboard feature uses a custom context called $clipboardHolder\n\t *\t\t// which has a loosened schema.\n\t *\t\tconst modelFragment = editor.data.toModel( viewFragment );\n\t *\n\t *\t\teditor.model.insertContent( modelFragment );\n\t *\n\t * By default this method will use the document selection but it can also be used with a position, range or selection instance.\n\t *\n\t *\t\t// Insert text at the current document selection position.\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ) );\n\t *\t\t} );\n\t *\n\t *\t\t// Insert text at a given position - the document selection will not be modified.\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), doc.getRoot(), 2 );\n\t *\n\t *\t\t\t// Which is a shorthand for:\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), writer.createPositionAt( doc.getRoot(), 2 ) );\n\t *\t\t} );\n\t *\n\t * If an instance of {@link module:engine/model/selection~Selection} is passed as `selectable`\n\t * it will be moved to the target position (where the document selection should be moved after the insertion).\n\t *\n\t *\t\teditor.model.change( writer => {\n\t *\t\t\t// Insert text replacing the given selection instance.\n\t *\t\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t\teditor.model.insertContent( writer.createText( 'x' ), selection );\n\t *\n\t *\t\t\t// insertContent() modifies the passed selection instance so it can be used to set the document selection.\n\t *\t\t\t// Note: This is not necessary when you passed the document selection to insertContent().\n\t *\t\t\twriter.setSelection( selection );\n\t *\t\t} );\n\t *\n\t * @fires insertContent\n\t * @param {module:engine/model/documentfragment~DocumentFragment|module:engine/model/item~Item} content The content to insert.\n\t * @param {module:engine/model/selection~Selectable} [selectable=model.document.selection]\n\t * The selection into which the content should be inserted. If not provided the current model document selection will be used.\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] To be used when a model item was passed as `selectable`.\n\t * This param defines a position in relation to that item.\n\t * @returns {module:engine/model/range~Range} Range which contains all the performed changes. This is a range that, if removed,\n\t * would return the model to the state before the insertion. If no changes were preformed by `insertContent`, returns a range collapsed\n\t * at the insertion position.\n\t */\n\tinsertContent( content, selectable, placeOrOffset ) {\n\t\treturn insertContent( this, content, selectable, placeOrOffset );\n\t}\n\n\t/**\n\t * Deletes content of the selection and merge siblings. The resulting selection is always collapsed.\n\t *\n\t * **Note:** For the sake of predictability, the resulting selection should always be collapsed.\n\t * In cases where a feature wants to modify deleting behavior so selection isn't collapsed\n\t * (e.g. a table feature may want to keep row selection after pressing <kbd>Backspace</kbd>),\n\t * then that behavior should be implemented in the view's listener. At the same time, the table feature\n\t * will need to modify this method's behavior too, e.g. to \"delete contents and then collapse\n\t * the selection inside the last selected cell\" or \"delete the row and collapse selection somewhere near\".\n\t * That needs to be done in order to ensure that other features which use `deleteContent()` will work well with tables.\n\t *\n\t * @fires deleteContent\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * Selection of which the content should be deleted.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.leaveUnmerged=false] Whether to merge elements after removing the content of the selection.\n\t *\n\t * For example `<heading1>x[x</heading1><paragraph>y]y</paragraph>` will become:\n\t *\n\t * * `<heading1>x^y</heading1>` with the option disabled (`leaveUnmerged == false`)\n\t * * `<heading1>x^</heading1><paragraph>y</paragraph>` with enabled (`leaveUnmerged == true`).\n\t *\n\t * Note: {@link module:engine/model/schema~Schema#isObject object} and {@link module:engine/model/schema~Schema#isLimit limit}\n\t * elements will not be merged.\n\t *\n\t * @param {Boolean} [options.doNotResetEntireContent=false] Whether to skip replacing the entire content with a\n\t * paragraph when the entire content was selected.\n\t *\n\t * For example `<heading1>[x</heading1><paragraph>y]</paragraph>` will become:\n\t *\n\t * * `<paragraph>^</paragraph>` with the option disabled (`doNotResetEntireContent == false`)\n\t * * `<heading1>^</heading1>` with enabled (`doNotResetEntireContent == true`)\n\t *\n\t * @param {Boolean} [options.doNotAutoparagraph=false] Whether to create a paragraph if after content deletion selection is moved\n\t * to a place where text cannot be inserted.\n\t *\n\t * For example `<paragraph>x</paragraph>[<image src=\"foo.jpg\"></image>]` will become:\n\t *\n\t * * `<paragraph>x</paragraph><paragraph>[]</paragraph>` with the option disabled (`doNotAutoparagraph == false`)\n\t * * `<paragraph>x[]</paragraph>` with the option enabled (`doNotAutoparagraph == true`).\n\t *\n\t * **Note:** if there is no valid position for the selection, the paragraph will always be created:\n\t *\n\t * `[<image src=\"foo.jpg\"></image>]` -> `<paragraph>[]</paragraph>`.\n\t */\n\tdeleteContent( selection, options ) {\n\t\tdeleteContent( this, selection, options );\n\t}\n\n\t/**\n\t * Modifies the selection. Currently, the supported modifications are:\n\t *\n\t * * Extending. The selection focus is moved in the specified `options.direction` with a step specified in `options.unit`.\n\t * Possible values for `unit` are:\n\t * * `'character'` (default) - moves selection by one user-perceived character. In most cases this means moving by one\n\t * character in `String` sense. However, unicode also defines \"combing marks\". These are special symbols, that combines\n\t * with a symbol before it (\"base character\") to create one user-perceived character. For example, `q̣̇` is a normal\n\t * letter `q` with two \"combining marks\": upper dot (`Ux0307`) and lower dot (`Ux0323`). For most actions, i.e. extending\n\t * selection by one position, it is correct to include both \"base character\" and all of it's \"combining marks\". That is\n\t * why `'character'` value is most natural and common method of modifying selection.\n\t * * `'codePoint'` - moves selection by one unicode code point. In contrary to, `'character'` unit, this will insert\n\t * selection between \"base character\" and \"combining mark\", because \"combining marks\" have their own unicode code points.\n\t * However, for technical reasons, unicode code points with values above `UxFFFF` are represented in native `String` by\n\t * two characters, called \"surrogate pairs\". Halves of \"surrogate pairs\" have a meaning only when placed next to each other.\n\t * For example `𨭎` is represented in `String` by `\\uD862\\uDF4E`. Both `\\uD862` and `\\uDF4E` do not have any meaning\n\t * outside the pair (are rendered as ? when alone). Position between them would be incorrect. In this case, selection\n\t * extension will include whole \"surrogate pair\".\n\t * * `'word'` - moves selection by a whole word.\n\t *\n\t * **Note:** if you extend a forward selection in a backward direction you will in fact shrink it.\n\t *\n\t * @fires modifySelection\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * The selection to modify.\n\t * @param {Object} [options]\n\t * @param {'forward'|'backward'} [options.direction='forward'] The direction in which the selection should be modified.\n\t * @param {'character'|'codePoint'|'word'} [options.unit='character'] The unit by which selection should be modified.\n\t */\n\tmodifySelection( selection, options ) {\n\t\tmodifySelection( this, selection, options );\n\t}\n\n\t/**\n\t * Gets a clone of the selected content.\n\t *\n\t * For example, for the following selection:\n\t *\n\t * ```html\n\t * <paragraph>x</paragraph>\n\t * <blockQuote>\n\t *\t<paragraph>y</paragraph>\n\t *\t<heading1>fir[st</heading1>\n\t * </blockQuote>\n\t * <paragraph>se]cond</paragraph>\n\t * <paragraph>z</paragraph>\n\t * ```\n\t *\n\t * It will return a document fragment with such a content:\n\t *\n\t * ```html\n\t * <blockQuote>\n\t *\t<heading1>st</heading1>\n\t * </blockQuote>\n\t * <paragraph>se</paragraph>\n\t * ```\n\t *\n\t * @fires getSelectedContent\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n\t * The selection of which content will be returned.\n\t * @returns {module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tgetSelectedContent( selection ) {\n\t\treturn getSelectedContent( this, selection );\n\t}\n\n\t/**\n\t * Checks whether the given {@link module:engine/model/range~Range range} or\n\t * {@link module:engine/model/element~Element element} has any meaningful content.\n\t *\n\t * Meaningful content is:\n\t *\n\t * * any text node (`options.ignoreWhitespaces` allows controlling whether this text node must also contain\n\t * any non-whitespace characters),\n\t * * or any {@link module:engine/model/schema~Schema#isObject object element},\n\t * * or any {@link module:engine/model/markercollection~Marker marker} which\n\t * {@link module:engine/model/markercollection~Marker#_affectsData affects data}.\n\t *\n\t * This means that a range containing an empty `<paragraph></paragraph>` is not considered to have a meaningful content.\n\t * However, a range containing an `<image></image>` (which would normally be marked in the schema as an object element)\n\t * is considered non-empty.\n\t *\n\t * @param {module:engine/model/range~Range|module:engine/model/element~Element} rangeOrElement Range or element to check.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.ignoreWhitespaces] Whether text node with whitespaces only should be considered empty.\n\t * @returns {Boolean}\n\t */\n\thasContent( rangeOrElement, options ) {\n\t\tconst range = rangeOrElement instanceof ModelElement ? ModelRange._createIn( rangeOrElement ) : rangeOrElement;\n\n\t\tif ( range.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if there are any markers which affects data in this given range.\n\t\tfor ( const intersectingMarker of this.markers.getMarkersIntersectingRange( range ) ) {\n\t\t\tif ( intersectingMarker.affectsData ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\tconst { ignoreWhitespaces = false } = options || {};\n\n\t\tfor ( const item of range.getItems() ) {\n\t\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\t\tif ( !ignoreWhitespaces ) {\n\t\t\t\t\treturn true;\n\t\t\t\t} else if ( item.data.search( /\\S/ ) !== -1 ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t} else if ( this.schema.isObject( item ) ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Creates a position from the given root and path in that root.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionFromPath `Writer#createPositionFromPath()`}.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.<Number>} path Position path. See {@link module:engine/model/position~Position#path}.\n\t * @param {module:engine/model/position~PositionStickiness} [stickiness='toNone'] Position stickiness.\n\t * See {@link module:engine/model/position~PositionStickiness}.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionFromPath( root, path, stickiness ) {\n\t\treturn new ModelPosition( root, path, stickiness );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/model/position~Position position},\n\t * * a parent element and offset in that element,\n\t * * a parent element and `'end'` (the position will be set at the end of that element),\n\t * * a {@link module:engine/model/item~Item model item} and `'before'` or `'after'`\n\t * (the position will be set before or after the given model item).\n\t *\n\t * This method is a shortcut to other factory methods such as:\n\t *\n\t * * {@link module:engine/model/model~Model#createPositionBefore `createPositionBefore()`},\n\t * * {@link module:engine/model/model~Model#createPositionAfter `createPositionAfter()`}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionAt `Writer#createPositionAt()`},\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn ModelPosition._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionAfter `Writer#createPositionAfter()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn ModelPosition._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createPositionBefore `Writer#createPositionBefore()`}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item before which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn ModelPosition._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from the `start` position to the `end` position.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createRange `Writer#createRange()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRange( start, end );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, the range will be collapsed\n\t * to the `start` position.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new ModelRange( start, end );\n\t}\n\n\t/**\n\t * Creates a range inside the given element which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createRangeIn `Writer#createRangeIn()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRangeIn( paragraph );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn ModelRange._createIn( element );\n\t}\n\n\t/**\n\t * Creates a range that starts before the given {@link module:engine/model/item~Item model item} and ends after it.\n\t *\n\t * Note: This method is also available on `writer` instance as\n\t * {@link module:engine/model/writer~Writer#createRangeOn `Writer.createRangeOn()`}:\n\t *\n\t *\t\tmodel.change( writer => {\n\t *\t\t\tconst range = writer.createRangeOn( paragraph );\n\t *\t\t} );\n\t *\n\t * @param {module:engine/model/item~Item} item\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn ModelRange._createOn( item );\n\t}\n\n\t/**\n\t * Creates a new selection instance based on the given {@link module:engine/model/selection~Selectable selectable}\n\t * or creates an empty selection if no arguments were passed.\n\t *\n\t * Note: This method is also available as\n\t * {@link module:engine/model/writer~Writer#createSelection `Writer#createSelection()`}.\n\t *\n\t *\t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t *\t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the given document selection.\n\t *\t\t// Note: It doesn't copies selection attributes.\n\t *\t\tconst documentSelection = model.document.selection;\n\t *\t\tconst selection = writer.createSelection( documentSelection );\n\t *\n\t *\t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates selection at the given offset in the given element.\n\t *\t\tconst paragraph = writer.createElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/model/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/model/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t *\t\t// Additional options (`'backward'`) can be specified as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * @param {module:engine/model/selection~Selectable} selectable\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Sets place or offset of the selection.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @returns {module:engine/model/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new ModelSelection( selectable, placeOrOffset, options );\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/batch~Batch} instance.\n\t *\n\t * **Note:** In most cases creating a batch instance is not necessary as they are created when using:\n\t *\n\t * * {@link #change `change()`},\n\t * * {@link #enqueueChange `enqueueChange()`}.\n\t *\n\t * @param {'transparent'|'default'} [type='default'] The type of the batch.\n\t * @returns {module:engine/model/batch~Batch}\n\t */\n\tcreateBatch( type ) {\n\t\treturn new Batch( type );\n\t}\n\n\t/**\n\t * Removes all events listeners set by model instance and destroys {@link module:engine/model/document~Document}.\n\t */\n\tdestroy() {\n\t\tthis.document.destroy();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Common part of {@link module:engine/model/model~Model#change} and {@link module:engine/model/model~Model#enqueueChange}\n\t * which calls callbacks and returns array of values returned by these callbacks.\n\t *\n\t * @private\n\t * @returns {Array.<*>} Array of values returned by callbacks.\n\t */\n\t_runPendingChanges() {\n\t\tconst ret = [];\n\n\t\tthis.fire( '_beforeChanges' );\n\n\t\twhile ( this._pendingChanges.length ) {\n\t\t\t// Create a new writer using batch instance created for this chain of changes.\n\t\t\tconst currentBatch = this._pendingChanges[ 0 ].batch;\n\t\t\tthis._currentWriter = new Writer( this, currentBatch );\n\n\t\t\t// Execute changes callback and gather the returned value.\n\t\t\tconst callbackReturnValue = this._pendingChanges[ 0 ].callback( this._currentWriter );\n\t\t\tret.push( callbackReturnValue );\n\n\t\t\tthis.document._handleChangeBlock( this._currentWriter );\n\n\t\t\tthis._pendingChanges.shift();\n\t\t\tthis._currentWriter = null;\n\t\t}\n\n\t\tthis.fire( '_afterChanges' );\n\n\t\treturn ret;\n\t}\n\n\t/**\n\t * Fired when entering the outermost {@link module:engine/model/model~Model#enqueueChange} or\n\t * {@link module:engine/model/model~Model#change} block.\n\t *\n\t * @protected\n\t * @event _beforeChanges\n\t */\n\n\t/**\n\t * Fired when leaving the outermost {@link module:engine/model/model~Model#enqueueChange} or\n\t * {@link module:engine/model/model~Model#change} block.\n\t *\n\t * @protected\n\t * @event _afterChanges\n\t */\n\n\t/**\n\t * Fired every time any {@link module:engine/model/operation/operation~Operation operation} is applied on the model\n\t * using {@link #applyOperation}.\n\t *\n\t * Note that this event is suitable only for very specific use-cases. Use it if you need to listen to every single operation\n\t * applied on the document. However, in most cases {@link module:engine/model/document~Document#event:change} should\n\t * be used.\n\t *\n\t * A few callbacks are already added to this event by engine internal classes:\n\t *\n\t * * with `highest` priority operation is validated,\n\t * * with `normal` priority operation is executed,\n\t * * with `low` priority the {@link module:engine/model/document~Document} updates its version,\n\t * * with `low` priority {@link module:engine/model/liveposition~LivePosition} and {@link module:engine/model/liverange~LiveRange}\n\t * update themselves.\n\t *\n\t * @event applyOperation\n\t * @param {Array} args Arguments of the `applyOperation` which is an array with a single element - applied\n\t * {@link module:engine/model/operation/operation~Operation operation}.\n\t */\n\n\t/**\n\t * Event fired when {@link #insertContent} method is called.\n\t *\n\t * The {@link #insertContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * **Note** The `selectable` parameter for the {@link #insertContent} is optional. When `undefined` value is passed the method uses\n\t * `model.document.selection`.\n\t *\n\t * @event insertContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #deleteContent} method is called.\n\t *\n\t * The {@link #deleteContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event deleteContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #modifySelection} method is called.\n\t *\n\t * The {@link #modifySelection default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event modifySelection\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n\n\t/**\n\t * Event fired when {@link #getSelectedContent} method is called.\n\t *\n\t * The {@link #getSelectedContent default action of that method} is implemented as a\n\t * listener to this event so it can be fully customized by the features.\n\t *\n\t * @event getSelectedContent\n\t * @param {Array} args The arguments passed to the original method.\n\t */\n}\n\nmix( Model, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/keystrokehandler\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport { getCode, parseKeystroke } from './keyboard';\n\n/**\n * Keystroke handler allows registering callbacks for given keystrokes.\n *\n * The most frequent use of this class is through the {@link module:core/editor/editor~Editor#keystrokes `editor.keystrokes`}\n * property. It allows listening to keystrokes executed in the editing view:\n *\n *\t\teditor.keystrokes.set( 'Ctrl+A', ( keyEvtData, cancel ) => {\n *\t\t\tconsole.log( 'Ctrl+A has been pressed' );\n *\t\t\tcancel();\n *\t\t} );\n *\n * However, this utility class can be used in various part of the UI. For instance, a certain {@link module:ui/view~View}\n * can use it like this:\n *\n *\t\tclass MyView extends View {\n *\t\t\tconstructor() {\n *\t\t\t\tthis.keystrokes = new KeystrokeHandler();\n *\n * \t\t\t\tthis.keystrokes.set( 'tab', handleTabKey );\n *\t\t\t}\n *\n *\t\t\trender() {\n *\t\t\t\tsuper.render();\n *\n *\t\t\t\tthis.keystrokes.listenTo( this.element );\n *\t\t\t}\n *\t\t}\n *\n * That keystroke handler will listen to `keydown` events fired in this view's main element.\n *\n */\nexport default class KeystrokeHandler {\n\t/**\n\t * Creates an instance of the keystroke handler.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * Listener used to listen to events for easier keystroke handler destruction.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/dom/emittermixin~Emitter}\n\t\t */\n\t\tthis._listener = Object.create( DomEmitterMixin );\n\t}\n\n\t/**\n\t * Starts listening for `keydown` events from a given emitter.\n\t *\n\t * @param {module:utils/emittermixin~Emitter} emitter\n\t */\n\tlistenTo( emitter ) {\n\t\t// The #_listener works here as a kind of dispatcher. It groups the events coming from the same\n\t\t// keystroke so the listeners can be attached to them with different priorities.\n\t\t//\n\t\t// E.g. all the keystrokes with the `keyCode` of 42 coming from the `emitter` are propagated\n\t\t// as a `_keydown:42` event by the `_listener`. If there's a callback created by the `set`\n\t\t// method for this 42 keystroke, it listens to the `_listener#_keydown:42` event only and interacts\n\t\t// only with other listeners of this particular event, thus making it possible to prioritize\n\t\t// the listeners and safely cancel execution, when needed. Instead of duplicating the Emitter logic,\n\t\t// the KeystrokeHandler re–uses it to do its job.\n\t\tthis._listener.listenTo( emitter, 'keydown', ( evt, keyEvtData ) => {\n\t\t\tthis._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t\t} );\n\t}\n\n\t/**\n\t * Registers a handler for the specified keystroke.\n\t *\n\t * @param {String|Array.<String|Number>} keystroke Keystroke defined in a format accepted by\n\t * the {@link module:utils/keyboard~parseKeystroke} function.\n\t * @param {Function} callback A function called with the\n\t * {@link module:engine/view/observer/keyobserver~KeyEventData key event data} object and\n\t * a helper funcion to call both `preventDefault()` and `stopPropagation()` on the underlying event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of the keystroke\n\t * callback. The higher the priority value the sooner the callback will be executed. Keystrokes having the same priority\n\t * are called in the order they were added.\n\t */\n\tset( keystroke, callback, options = {} ) {\n\t\tconst keyCode = parseKeystroke( keystroke );\n\t\tconst priority = options.priority;\n\n\t\t// Execute the passed callback on KeystrokeHandler#_keydown.\n\t\t// TODO: https://github.com/ckeditor/ckeditor5-utils/issues/144\n\t\tthis._listener.listenTo( this._listener, '_keydown:' + keyCode, ( evt, keyEvtData ) => {\n\t\t\tcallback( keyEvtData, () => {\n\t\t\t\t// Stop the event in the DOM: no listener in the web page\n\t\t\t\t// will be triggered by this event.\n\t\t\t\tkeyEvtData.preventDefault();\n\t\t\t\tkeyEvtData.stopPropagation();\n\n\t\t\t\t// Stop the event in the KeystrokeHandler: no more callbacks\n\t\t\t\t// will be executed for this keystroke.\n\t\t\t\tevt.stop();\n\t\t\t} );\n\n\t\t\t// Mark this keystroke as handled by the callback. See: #press.\n\t\t\tevt.return = true;\n\t\t}, { priority } );\n\t}\n\n\t/**\n\t * Triggers a keystroke handler for a specified key combination, if such a keystroke was {@link #set defined}.\n\t *\n\t * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEvtData Key event data.\n\t * @returns {Boolean} Whether the keystroke was handled.\n\t */\n\tpress( keyEvtData ) {\n\t\treturn !!this._listener.fire( '_keydown:' + getCode( keyEvtData ), keyEvtData );\n\t}\n\n\t/**\n\t * Destroys the keystroke handler.\n\t */\n\tdestroy() {\n\t\tthis._listener.stopListening();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editingkeystrokehandler\n */\n\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\n/**\n * A keystroke handler for editor editing. Its instance is available\n * in {@link module:core/editor/editor~Editor#keystrokes} so plugins\n * can register their keystrokes.\n *\n * E.g. an undo plugin would do this:\n *\n *\t\teditor.keystrokes.set( 'Ctrl+Z', 'undo' );\n *\t\teditor.keystrokes.set( 'Ctrl+Shift+Z', 'redo' );\n *\t\teditor.keystrokes.set( 'Ctrl+Y', 'redo' );\n *\n * @extends module:utils/keystrokehandler~KeystrokeHandler\n */\nexport default class EditingKeystrokeHandler extends KeystrokeHandler {\n\t/**\n\t * Creates an instance of the keystroke handler.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t */\n\tconstructor( editor ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * The editor instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\t}\n\n\t/**\n\t * Registers a handler for the specified keystroke.\n\t *\n\t * The handler can be specified as a command name or a callback.\n\t *\n\t * @param {String|Array.<String|Number>} keystroke Keystroke defined in a format accepted by\n\t * the {@link module:utils/keyboard~parseKeystroke} function.\n\t * @param {Function|String} callback If a string is passed, then the keystroke will\n\t * {@link module:core/editor/editor~Editor#execute execute a command}.\n\t * If a function, then it will be called with the\n\t * {@link module:engine/view/observer/keyobserver~KeyEventData key event data} object and\n\t * a `cancel()` helper to both `preventDefault()` and `stopPropagation()` of the event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of the keystroke\n\t * callback. The higher the priority value the sooner the callback will be executed. Keystrokes having the same priority\n\t * are called in the order they were added.\n\t */\n\tset( keystroke, callback, options = {} ) {\n\t\tif ( typeof callback == 'string' ) {\n\t\t\tconst commandName = callback;\n\n\t\t\tcallback = ( evtData, cancel ) => {\n\t\t\t\tthis.editor.execute( commandName );\n\t\t\t\tcancel();\n\t\t\t};\n\t\t}\n\n\t\tsuper.set( keystroke, callback, options );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/editor\n */\n\nimport Config from '@ckeditor/ckeditor5-utils/src/config';\nimport EditingController from '@ckeditor/ckeditor5-engine/src/controller/editingcontroller';\nimport PluginCollection from '../plugincollection';\nimport CommandCollection from '../commandcollection';\nimport Locale from '@ckeditor/ckeditor5-utils/src/locale';\nimport DataController from '@ckeditor/ckeditor5-engine/src/controller/datacontroller';\nimport Conversion from '@ckeditor/ckeditor5-engine/src/conversion/conversion';\nimport Model from '@ckeditor/ckeditor5-engine/src/model/model';\nimport EditingKeystrokeHandler from '../editingkeystrokehandler';\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Class representing a basic, generic editor.\n *\n * Check out the list of its subclasses to learn about specific editor implementations.\n *\n * All editor implementations (like {@link module:editor-classic/classiceditor~ClassicEditor} or\n * {@link module:editor-inline/inlineeditor~InlineEditor}) should extend this class. They can add their\n * own methods and properties.\n *\n * When you are implementing a plugin, then this editor represents the API\n * which your plugin can expect to get when using its {@link module:core/plugin~Plugin#editor} property.\n *\n * This API should be sufficient in order to implement the \"editing\" part of your feature\n * (schema definition, conversion, commands, keystrokes, etc.).\n * It does not define the editor UI, which is available only if the\n * the specific editor implements also the {@link module:core/editor/editorwithui~EditorWithUI} interface\n * (as most editor implementations do).\n *\n * @abstract\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Editor {\n\t/**\n\t * Creates a new instance of the Editor class.\n\t *\n\t * Usually, not to be used directly. See the static {@link module:core/editor/editor~Editor.create `create()`} method.\n\t *\n\t * @param {Object} [config] The editor config.\n\t */\n\tconstructor( config ) {\n\t\tconst availablePlugins = this.constructor.builtinPlugins;\n\n\t\t/**\n\t\t * Holds all configurations specific to this editor instance.\n\t\t *\n\t\t *\t\teditor.config.get( 'image.toolbar' );\n\t\t *\t\t// -> [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/config~Config}\n\t\t */\n\t\tthis.config = new Config( config, this.constructor.defaultConfig );\n\n\t\tthis.config.define( 'plugins', availablePlugins );\n\n\t\t/**\n\t\t * The plugins loaded and in use by this editor instance.\n\t\t *\n\t\t *\t\teditor.plugins.get( 'Clipboard' ); // -> instance of the Clipboard plugin.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/plugincollection~PluginCollection}\n\t\t */\n\t\tthis.plugins = new PluginCollection( this, availablePlugins );\n\n\t\t/**\n\t\t * Commands registered to the editor.\n\t\t *\n\t\t * Use the shorthand {@link #execute `editor.execute()`} method to execute commands:\n\t\t *\n\t\t *\t\t// Execute the bold command:\n\t\t *\t\teditor.execute( 'bold' );\n\t\t *\n\t\t *\t\t// Check the state of the bold command:\n\t\t *\t\teditor.commands.get( 'bold' ).value;\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/commandcollection~CommandCollection}\n\t\t */\n\t\tthis.commands = new CommandCollection();\n\n\t\tconst languageConfig = this.config.get( 'language' ) || {};\n\n\t\t/**\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = new Locale( {\n\t\t\tuiLanguage: typeof languageConfig === 'string' ? languageConfig : languageConfig.ui,\n\t\t\tcontentLanguage: this.config.get( 'language.content' )\n\t\t} );\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method #t\n\t\t */\n\t\tthis.t = this.locale.t;\n\n\t\t/**\n\t\t * Indicates the editor life-cycle state.\n\t\t *\n\t\t * The editor is in one of the following states:\n\t\t *\n\t\t * * `initializing` - during the editor initialization (before {@link module:core/editor/editor~Editor.create `Editor.create()`})\n\t\t * finished its job,\n\t\t * * `ready` - after the promise returned by the {@link module:core/editor/editor~Editor.create `Editor.create()`}\n\t\t * method is resolved,\n\t\t * * `destroyed` - once the {@link #destroy `editor.destroy()`} method was called.\n\t\t *\n\t\t * @observable\n\t\t * @member {'initializing'|'ready'|'destroyed'} #state\n\t\t */\n\t\tthis.set( 'state', 'initializing' );\n\t\tthis.once( 'ready', () => ( this.state = 'ready' ), { priority: 'high' } );\n\t\tthis.once( 'destroy', () => ( this.state = 'destroyed' ), { priority: 'high' } );\n\n\t\t/**\n\t\t * Defines whether this editor is in read-only mode.\n\t\t *\n\t\t * In read-only mode the editor {@link #commands commands} are disabled so it is not possible\n\t\t * to modify the document by using them. Also, the editable element(s) become non-editable.\n\t\t *\n\t\t * In order to make the editor read-only, you can set this value directly:\n\t\t *\n\t\t *\t\teditor.isReadOnly = true;\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * The editor's model.\n\t\t *\n\t\t * The central point of the editor's abstract data model.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model}\n\t\t */\n\t\tthis.model = new Model();\n\n\t\t/**\n\t\t * The {@link module:engine/controller/datacontroller~DataController data controller}.\n\t\t * Used e.g. for setting and retrieving editor data.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/datacontroller~DataController}\n\t\t */\n\t\tthis.data = new DataController( this.model );\n\n\t\t/**\n\t\t * The {@link module:engine/controller/editingcontroller~EditingController editing controller}.\n\t\t * Controls user input and rendering the content for editing.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/editingcontroller~EditingController}\n\t\t */\n\t\tthis.editing = new EditingController( this.model );\n\t\tthis.editing.view.document.bind( 'isReadOnly' ).to( this );\n\n\t\t/**\n\t\t * Conversion manager through which you can register model to view and view to model converters.\n\t\t *\n\t\t * See {@link module:engine/conversion/conversion~Conversion}'s documentation to learn how to add converters.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/conversion/conversion~Conversion}\n\t\t */\n\t\tthis.conversion = new Conversion( [ this.editing.downcastDispatcher, this.data.downcastDispatcher ], this.data.upcastDispatcher );\n\t\tthis.conversion.addAlias( 'dataDowncast', this.data.downcastDispatcher );\n\t\tthis.conversion.addAlias( 'editingDowncast', this.editing.downcastDispatcher );\n\n\t\t/**\n\t\t * Instance of the {@link module:core/editingkeystrokehandler~EditingKeystrokeHandler}.\n\t\t *\n\t\t * It allows setting simple keystrokes:\n\t\t *\n\t\t *\t\t// Execute the bold command on Ctrl+E:\n\t\t *\t\teditor.keystrokes.set( 'Ctrl+E', 'bold' );\n\t\t *\n\t\t *\t\t// Execute your own callback:\n\t\t *\t\teditor.keystrokes.set( 'Ctrl+E', ( data, cancel ) => {\n\t\t *\t\t\tconsole.log( data.keyCode );\n\t\t *\n\t\t *\t\t\t// Prevent default (native) action and stop the underlying keydown event\n\t\t *\t\t\t// so no other editor feature will interfere.\n\t\t *\t\t\tcancel();\n\t\t *\t\t} );\n\t\t *\n\t\t * Note: Certain, typing oriented keystrokes (like <kbd>Backspace</kbd> or <kbd>Enter</kbd>) are handled\n\t\t * by low level mechanism and trying to listen to them via the keystroke handler will not work reliably.\n\t\t * To handle those specific keystrokes see the events fired by the\n\t\t * {@link module:engine/view/document~Document editing view document} (`editor.editing.view.document`).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editingkeystrokehandler~EditingKeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new EditingKeystrokeHandler( this );\n\t\tthis.keystrokes.listenTo( this.editing.view.document );\n\t}\n\n\t/**\n\t * Loads and initializes plugins specified in the config.\n\t *\n\t * @returns {Promise.<module:core/plugin~LoadedPlugins>} A promise which resolves\n\t * once the initialization is completed providing an array of loaded plugins.\n\t */\n\tinitPlugins() {\n\t\tconst config = this.config;\n\t\tconst plugins = config.get( 'plugins' ) || [];\n\t\tconst removePlugins = config.get( 'removePlugins' ) || [];\n\t\tconst extraPlugins = config.get( 'extraPlugins' ) || [];\n\n\t\treturn this.plugins.init( plugins.concat( extraPlugins ), removePlugins );\n\t}\n\n\t/**\n\t * Destroys the editor instance, releasing all resources used by it.\n\t *\n\t * **Note** The editor cannot be destroyed during the initialization phase so if it is called\n\t * while the editor {@link #state is being initialized}, it will wait for the editor initialization before destroying it.\n\t *\n\t * @fires destroy\n\t * @returns {Promise} A promise that resolves once the editor instance is fully destroyed.\n\t */\n\tdestroy() {\n\t\tlet readyPromise = Promise.resolve();\n\n\t\tif ( this.state == 'initializing' ) {\n\t\t\treadyPromise = new Promise( resolve => this.once( 'ready', resolve ) );\n\t\t}\n\n\t\treturn readyPromise\n\t\t\t.then( () => {\n\t\t\t\tthis.fire( 'destroy' );\n\t\t\t\tthis.stopListening();\n\t\t\t\tthis.commands.destroy();\n\t\t\t} )\n\t\t\t.then( () => this.plugins.destroy() )\n\t\t\t.then( () => {\n\t\t\t\tthis.model.destroy();\n\t\t\t\tthis.data.destroy();\n\t\t\t\tthis.editing.destroy();\n\t\t\t\tthis.keystrokes.destroy();\n\t\t\t} );\n\t}\n\n\t/**\n\t * Executes specified command with given parameters.\n\t *\n\t * Shorthand for:\n\t *\n\t *\t\teditor.commands.get( commandName ).execute( ... );\n\t *\n\t * @param {String} commandName Name of command to execute.\n\t * @param {*} [...commandParams] Command parameters.\n\t */\n\texecute( ...args ) {\n\t\ttry {\n\t\t\tthis.commands.execute( ...args );\n\t\t} catch ( err ) {\n\t\t\t// @if CK_DEBUG // throw err;\n\t\t\t/* istanbul ignore next */\n\t\t\tCKEditorError.rethrowUnexpectedError( err, this );\n\t\t}\n\t}\n\n\t/**\n\t * Creates and initializes a new editor instance.\n\t *\n\t * This is an abstract method. Every editor type needs to implement its own initialization logic.\n\t *\n\t * See the `create()` methods of the existing editor types to learn how to use them:\n\t *\n\t * * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}\n\t * * {@link module:editor-balloon/ballooneditor~BalloonEditor.create `BalloonEditor.create()`}\n\t * * {@link module:editor-decoupled/decouplededitor~DecoupledEditor.create `DecoupledEditor.create()`}\n\t * * {@link module:editor-inline/inlineeditor~InlineEditor.create `InlineEditor.create()`}\n\t *\n\t * @abstract\n\t * @method module:core/editor/editor~Editor.create\n\t */\n}\n\nmix( Editor, ObservableMixin );\n\n/**\n * Fired when {@link module:engine/controller/datacontroller~DataController#event:ready data} and all additional\n * editor components are ready.\n *\n * Note: This event is most useful for plugin developers. When integrating the editor with your website or\n * application you do not have to listen to `editor#ready` because when the promise returned by the static\n * {@link module:core/editor/editor~Editor.create `Editor.create()`} event is resolved, the editor is already ready.\n * In fact, since the first moment when the editor instance is available to you is inside `then()`'s callback,\n * you cannot even add a listener to the `editor#ready` event.\n *\n * See also the {@link #state `editor.state`} property.\n *\n * @event ready\n */\n\n/**\n * Fired when this editor instance is destroyed. The editor at this point is not usable and this event should be used to\n * perform the clean-up in any plugin.\n *\n *\n * See also the {@link #state `editor.state`} property.\n *\n * @event destroy\n */\n\n/**\n * This error is thrown when a user tries to use a `<textarea>` element to create a non-classic editor in it.\n *\n * Textarea element represents a plain-text and cannot be used as a editable root element with included CKEditor5.\n * Content of an editor should be nicely present to the user and show him how it's going to looks like. Textarea element\n * doesn't support such behavior.\n *\n * Typically you can use a `div` for storing editor content instead:\n *\n *\t\t<div id=\"editor\">\n *\t\t\t<p>Initial content.</p>\n *\t\t</div>\n *\n * Only {@glink builds/guides/overview#classic-editor Classic Editor} has implemented a special system, which\n * **replace** DOM element and load data from it\n * ({@link module:editor-classic/classiceditor~ClassicEditor.create more information}). All other editors\n * use an existing element, load data from it and make this element editable. Details about behaviour of each editor\n * might be found in an associated description of a `create` method of each editor.\n *\n * @error editor-wrong-element\n */\n\n/**\n * An array of plugins built into this editor class.\n * It is used in CKEditor 5 builds to provide a list of plugins which are later automatically initialized\n * during the editor initialization.\n *\n * They will be automatically initialized by the editor, unless listed in `config.removePlugins` and\n * unless `config.plugins` is passed.\n *\n *\t\t// Build some plugins into the editor class first.\n *\t\tClassicEditor.builtinPlugins = [ FooPlugin, BarPlugin ];\n *\n *\t\t// Normally, you need to define config.plugins, but since ClassicEditor.builtinPlugins was\n *\t\t// defined, now you can call create() without any configuration.\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> instance of the Foo plugin\n *\t\t\t\teditor.plugins.get( BarPlugin ); // -> instance of the Bar plugin\n *\t\t\t} );\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, {\n *\t\t\t\t// Don't initialize this plugins (note: it's defined by a string):\n *\t\t\t\tremovePlugins: [ 'Foo' ]\n *\t\t\t} )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> undefined\n *\t\t\t\teditor.config.get( BarPlugin ); // -> instance of the Bar plugin\n *\t\t\t} );\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, {\n *\t\t\t\t// Load only this plugin. Can also be define by a string if\n *\t\t\t\t// this plugin was built into the editor class.\n *\t\t\t\tplugins: [ FooPlugin ]\n *\t\t\t} )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.plugins.get( FooPlugin ); // -> instance of the Foo plugin\n *\t\t\t\teditor.config.get( BarPlugin ); // -> undefined\n *\t\t\t} );\n *\n * See also {@link module:core/editor/editor~Editor.defaultConfig}.\n *\n * @static\n * @member {Array.<Function>} module:core/editor/editor~Editor.builtinPlugins\n */\n\n/**\n * The default config which is built into the editor class.\n * It is used in CKEditor 5 builds to provide the default config options which are later used during editor initialization.\n *\n *\t\tClassicEditor.defaultConfig = {\n *\t\t\tfoo: 1,\n *\t\t\tbar: 2\n *\t\t};\n *\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.config.get( 'foo' ); // -> 1\n *\t\t\t\teditor.config.get( 'bar' ); // -> 2\n *\t\t\t} );\n *\n *\t\t// The default options can be overridden by the config passed to create().\n *\t\tClassicEditor\n *\t\t\t.create( sourceElement, { bar: 3 } )\n *\t\t\t.then( editor => {\n *\t\t\t\teditor.config.get( 'foo' ); // -> 1\n *\t\t\t\teditor.config.get( 'bar' ); // -> 3\n *\t\t\t} );\n *\n * See also {@link module:core/editor/editor~Editor.builtinPlugins}.\n *\n * @static\n * @member {Object} module:core/editor/editor~Editor.defaultConfig\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/utils/dataapimixin\n */\n\n/**\n * Implementation of the {@link module:core/editor/utils/dataapimixin~DataApi}.\n *\n * @mixin DataApiMixin\n * @implements module:core/editor/utils/dataapimixin~DataApi\n */\nconst DataApiMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tsetData( data ) {\n\t\tthis.data.set( data );\n\t},\n\n\t/**\n\t * @inheritDoc\n\t */\n\tgetData( options ) {\n\t\treturn this.data.get( options );\n\t}\n};\n\nexport default DataApiMixin;\n\n/**\n * Interface defining editor methods for setting and getting data to and from the editor's main root element\n * using the {@link module:core/editor/editor~Editor#data data pipeline}.\n *\n * This interface is not a part of the {@link module:core/editor/editor~Editor} class because one may want to implement\n * an editor with multiple root elements, in which case the methods for setting and getting data will need to be implemented\n * differently.\n *\n * @interface DataApi\n */\n\n/**\n * Sets the data in the editor.\n *\n *\t\teditor.setData( '<p>This is editor!</p>' );\n *\n * By default the editor accepts HTML. This can be controlled by injecting a different data processor.\n * See the {@glink features/markdown Markdown output} guide for more details.\n *\n * Note: Not only is the format of the data configurable, but the type of the `setData()`'s parameter does not\n * have to be a string either. You can e.g. accept an object or a DOM `DocumentFragment` if you consider this\n * the right format for you.\n *\n * @method #setData\n * @param {String} data Input data.\n */\n\n/**\n * Gets the data from the editor.\n *\n *\t\teditor.getData(); // -> '<p>This is editor!</p>'\n *\n * By default the editor outputs HTML. This can be controlled by injecting a different data processor.\n * See the {@glink features/markdown Markdown output} guide for more details.\n *\n * Note: Not only is the format of the data configurable, but the type of the `getData()`'s return value does not\n * have to be a string either. You can e.g. return an object or a DOM `DocumentFragment` if you consider this\n * the right format for you.\n *\n * @method #getData\n * @param {Object} [options]\n * @param {String} [options.rootName='main'] Root name.\n * @param {String} [options.trim='empty'] Whether returned data should be trimmed. This option is set to `'empty'` by default,\n * which means that whenever editor content is considered empty, an empty string is returned. To turn off trimming\n * use `'none'`. In such cases exact content will be returned (for example `'<p> </p>'` for an empty editor).\n * @returns {String} Output data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport setDataInElement from '@ckeditor/ckeditor5-utils/src/dom/setdatainelement';\n\n/**\n * @module core/editor/utils/elementapimixin\n */\n\n/**\n * Implementation of the {@link module:core/editor/utils/elementapimixin~ElementApi}.\n *\n * @mixin ElementApiMixin\n * @implements module:core/editor/utils/elementapimixin~ElementApi\n */\nconst ElementApiMixin = {\n\t/**\n\t * @inheritDoc\n\t */\n\tupdateSourceElement() {\n\t\tif ( !this.sourceElement ) {\n\t\t\t/**\n\t\t\t * Cannot update the source element of a detached editor.\n\t\t\t *\n\t\t\t * The {@link ~ElementApi#updateSourceElement `updateSourceElement()`} method cannot be called if you did not\n\t\t\t * pass an element to `Editor.create()`.\n\t\t\t *\n\t\t\t * @error editor-missing-sourceelement\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'editor-missing-sourceelement: Cannot update the source element of a detached editor.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tsetDataInElement( this.sourceElement, this.data.get() );\n\t}\n};\n\nexport default ElementApiMixin;\n\n/**\n * Interface describing an editor that replaced a DOM element (was \"initialized on an element\").\n *\n * Such an editor should provide a method to\n * {@link module:core/editor/utils/elementapimixin~ElementApi#updateSourceElement update the replaced element with the current data}.\n *\n * @interface ElementApi\n */\n\n/**\n * The element on which the editor has been initialized.\n *\n * @readonly\n * @member {HTMLElement} #sourceElement\n */\n\n/**\n * Updates the {@link #sourceElement editor source element}'s content with the data.\n *\n * @method #updateSourceElement\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/setdatainelement\n */\n\n/* globals HTMLTextAreaElement */\n\n/**\n * Sets data in a given element.\n *\n * @param {HTMLElement} el The element in which the data will be set.\n * @param {String} data The data string.\n */\nexport default function setDataInElement( el, data ) {\n\tif ( el instanceof HTMLTextAreaElement ) {\n\t\tel.value = data;\n\t}\n\n\tel.innerHTML = data;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/dataprocessor/basichtmlwriter\n */\n\n/* globals document */\n\n/**\n * Basic HTML writer. It uses the native `innerHTML` property for basic conversion\n * from a document fragment to an HTML string.\n *\n * @implements module:engine/dataprocessor/htmlwriter~HtmlWriter\n */\nexport default class BasicHtmlWriter {\n\t/**\n\t * Returns an HTML string created from the document fragment.\n\t *\n\t * @param {DocumentFragment} fragment\n\t * @returns {String}\n\t */\n\tgetHtml( fragment ) {\n\t\tconst doc = document.implementation.createHTMLDocument( '' );\n\t\tconst container = doc.createElement( 'div' );\n\t\tcontainer.appendChild( fragment );\n\n\t\treturn container.innerHTML;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/dataprocessor/htmldataprocessor\n */\n\n/* globals document, DOMParser */\n\nimport BasicHtmlWriter from './basichtmlwriter';\nimport DomConverter from '../view/domconverter';\n\n/**\n * The HTML data processor class.\n * This data processor implementation uses HTML as input and output data.\n *\n * @implements module:engine/dataprocessor/dataprocessor~DataProcessor\n */\nexport default class HtmlDataProcessor {\n\t/**\n\t * Creates a new instance of the HTML data processor class.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * A DOM parser instance used to parse an HTML string to an HTML document.\n\t\t *\n\t\t * @private\n\t\t * @member {DOMParser}\n\t\t */\n\t\tthis._domParser = new DOMParser();\n\n\t\t/**\n\t\t * A DOM converter used to convert DOM elements to view elements.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis._domConverter = new DomConverter( { blockFillerMode: 'nbsp' } );\n\n\t\t/**\n\t\t * A basic HTML writer instance used to convert DOM elements to an HTML string.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/dataprocessor/basichtmlwriter~BasicHtmlWriter}\n\t\t */\n\t\tthis._htmlWriter = new BasicHtmlWriter();\n\t}\n\n\t/**\n\t * Converts a provided {@link module:engine/view/documentfragment~DocumentFragment document fragment}\n\t * to data format — in this case to an HTML string.\n\t *\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment\n\t * @returns {String} HTML string.\n\t */\n\ttoData( viewFragment ) {\n\t\t// Convert view DocumentFragment to DOM DocumentFragment.\n\t\tconst domFragment = this._domConverter.viewToDom( viewFragment, document );\n\n\t\t// Convert DOM DocumentFragment to HTML output.\n\t\treturn this._htmlWriter.getHtml( domFragment );\n\t}\n\n\t/**\n\t * Converts the provided HTML string to a view tree.\n\t *\n\t * @param {String} data An HTML string.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} A converted view element.\n\t */\n\ttoView( data ) {\n\t\t// Convert input HTML data to DOM DocumentFragment.\n\t\tconst domFragment = this._toDom( data );\n\n\t\t// Convert DOM DocumentFragment to view DocumentFragment.\n\t\treturn this._domConverter.domToView( domFragment );\n\t}\n\n\t/**\n\t * Converts an HTML string to its DOM representation. Returns a document fragment containing nodes parsed from\n\t * the provided data.\n\t *\n\t * @private\n\t * @param {String} data\n\t * @returns {DocumentFragment}\n\t */\n\t_toDom( data ) {\n\t\tconst document = this._domParser.parseFromString( data, 'text/html' );\n\t\tconst fragment = document.createDocumentFragment();\n\t\tconst nodes = document.body.childNodes;\n\n\t\twhile ( nodes.length > 0 ) {\n\t\t\tfragment.appendChild( nodes[ 0 ] );\n\t\t}\n\n\t\treturn fragment;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/componentfactory\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * A helper class implementing the UI component ({@link module:ui/view~View view}) factory.\n *\n * It allows functions producing specific UI components to be registered under their unique names\n * in the factory. A registered component can be then instantiated by providing its name.\n * Note that names are case insensitive.\n *\n *\t\t// The editor provides localization tools for the factory.\n *\t\tconst factory = new ComponentFactory( editor );\n *\n *\t\tfactory.add( 'foo', locale => new FooView( locale ) );\n *\t\tfactory.add( 'bar', locale => new BarView( locale ) );\n *\n *\t\t// An instance of FooView.\n *\t\tconst fooInstance = factory.create( 'foo' );\n *\n *\t\t// Names are case insensitive so this is also allowed:\n *\t\tconst barInstance = factory.create( 'Bar' );\n *\n * The {@link module:core/editor/editor~Editor#locale editor locale} is passed to the factory\n * function when {@link module:ui/componentfactory~ComponentFactory#create} is called.\n */\nexport default class ComponentFactory {\n\t/**\n\t * Creates an instance of the factory.\n\t *\n\t * @constructor\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor instance that the factory belongs to.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * Registered component factories.\n\t\t *\n\t\t * @private\n\t\t * @member {Map}\n\t\t */\n\t\tthis._components = new Map();\n\t}\n\n\t/**\n\t * Returns an iterator of registered component names. Names are returned in lower case.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\t* names() {\n\t\tfor ( const value of this._components.values() ) {\n\t\t\tyield value.originalName;\n\t\t}\n\t}\n\n\t/**\n\t * Registers a component factory function that will be used by the\n\t * {@link #create create} method and called with the\n\t * {@link module:core/editor/editor~Editor#locale editor locale} as an argument,\n\t * allowing localization of the {@link module:ui/view~View view}.\n\t *\n\t * @param {String} name The name of the component.\n\t * @param {Function} callback The callback that returns the component.\n\t */\n\tadd( name, callback ) {\n\t\tif ( this.has( name ) ) {\n\t\t\t/**\n\t\t\t * The item already exists in the component factory.\n\t\t\t *\n\t\t\t * @error componentfactory-item-exists\n\t\t\t * @param {String} name The name of the component.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'componentfactory-item-exists: The item already exists in the component factory.',\n\t\t\t\tthis,\n\t\t\t\t{ name }\n\t\t\t);\n\t\t}\n\n\t\tthis._components.set( getNormalized( name ), { callback, originalName: name } );\n\t}\n\n\t/**\n\t * Creates an instance of a component registered in the factory under a specific name.\n\t *\n\t * When called, the {@link module:core/editor/editor~Editor#locale editor locale} is passed to\n\t * the previously {@link #add added} factory function, allowing localization of the\n\t * {@link module:ui/view~View view}.\n\t *\n\t * @param {String} name The name of the component.\n\t * @returns {module:ui/view~View} The instantiated component view.\n\t */\n\tcreate( name ) {\n\t\tif ( !this.has( name ) ) {\n\t\t\t/**\n\t\t\t * The required component is not registered in the component factory. Please make sure\n\t\t\t * the provided name is correct and the component has been correctly\n\t\t\t * {@link #add added} to the factory.\n\t\t\t *\n\t\t\t * @error componentfactory-item-missing\n\t\t\t * @param {String} name The name of the missing component.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'componentfactory-item-missing: The required component is not registered in the factory.',\n\t\t\t\tthis,\n\t\t\t\t{ name }\n\t\t\t);\n\t\t}\n\n\t\treturn this._components.get( getNormalized( name ) ).callback( this.editor.locale );\n\t}\n\n\t/**\n\t * Checks if a component of a given name is registered in the factory.\n\t *\n\t * @param {String} name The name of the component.\n\t * @returns {Boolean}\n\t */\n\thas( name ) {\n\t\treturn this._components.has( getNormalized( name ) );\n\t}\n}\n\n//\n// Ensures that the component name used as the key in the internal map is in lower case.\n//\n// @private\n// @param {String} name\n// @returns {String}\nfunction getNormalized( name ) {\n\treturn String( name ).toLowerCase();\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* global setTimeout, clearTimeout */\n\n/**\n * @module utils/focustracker\n */\n\nimport DomEmitterMixin from './dom/emittermixin';\nimport ObservableMixin from './observablemixin';\nimport CKEditorError from './ckeditorerror';\nimport mix from './mix';\n\n/**\n * Allows observing a group of `HTMLElement`s whether at least one of them is focused.\n *\n * Used by the {@link module:core/editor/editor~Editor} in order to track whether the focus is still within the application,\n * or were used outside of its UI.\n *\n * **Note** `focus` and `blur` listeners use event capturing, so it is only needed to register wrapper `HTMLElement`\n * which contain other `focusable` elements. But note that this wrapper element has to be focusable too\n * (have e.g. `tabindex=\"-1\"`).\n *\n * @mixes module:utils/dom/emittermixin~EmitterMixin\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class FocusTracker {\n\tconstructor() {\n\t\t/**\n\t\t * True when one of the registered elements is focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The currently focused element.\n\t\t *\n\t\t * While {@link #isFocused `isFocused`} remains `true`, the focus can\n\t\t * move between different UI elements. This property tracks those\n\t\t * elements and tells which one is currently focused.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {HTMLElement|null}\n\t\t */\n\t\tthis.set( 'focusedElement', null );\n\n\t\t/**\n\t\t * List of registered elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Set.<HTMLElement>}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Event loop timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number}\n\t\t */\n\t\tthis._nextEventLoopTimeout = null;\n\t}\n\n\t/**\n\t * Starts tracking the specified element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tadd( element ) {\n\t\tif ( this._elements.has( element ) ) {\n\t\t\tthrow new CKEditorError( 'focusTracker-add-element-already-exist', this );\n\t\t}\n\n\t\tthis.listenTo( element, 'focus', () => this._focus( element ), { useCapture: true } );\n\t\tthis.listenTo( element, 'blur', () => this._blur(), { useCapture: true } );\n\t\tthis._elements.add( element );\n\t}\n\n\t/**\n\t * Stops tracking the specified element and stops listening on this element.\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tremove( element ) {\n\t\tif ( element === this.focusedElement ) {\n\t\t\tthis._blur( element );\n\t\t}\n\n\t\tif ( this._elements.has( element ) ) {\n\t\t\tthis.stopListening( element );\n\t\t\tthis._elements.delete( element );\n\t\t}\n\t}\n\n\t/**\n\t * Destroys the focus tracker by:\n\t * - Disabling all event listeners attached to tracked elements.\n\t * - Removing all tracked elements that were previously added.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Stores currently focused element and set {#isFocused} as `true`.\n\t *\n\t * @private\n\t * @param {HTMLElement} element Element which has been focused.\n\t */\n\t_focus( element ) {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis.focusedElement = element;\n\t\tthis.isFocused = true;\n\t}\n\n\t/**\n\t * Clears currently focused element and set {@link #isFocused} as `false`.\n\t * This method uses `setTimeout` to change order of fires `blur` and `focus` events.\n\t *\n\t * @private\n\t * @fires blur\n\t */\n\t_blur() {\n\t\tclearTimeout( this._nextEventLoopTimeout );\n\n\t\tthis._nextEventLoopTimeout = setTimeout( () => {\n\t\t\tthis.focusedElement = null;\n\t\t\tthis.isFocused = false;\n\t\t}, 0 );\n\t}\n\n\t/**\n\t * @event focus\n\t */\n\n\t/**\n\t * @event blur\n\t */\n}\n\nmix( FocusTracker, DomEmitterMixin );\nmix( FocusTracker, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/editor/editorui\n */\n\n/* globals console */\n\nimport ComponentFactory from '@ckeditor/ckeditor5-ui/src/componentfactory';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * A class providing the minimal interface that is required to successfully bootstrap any editor UI.\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class EditorUI {\n\t/**\n\t * Creates an instance of the editor UI class.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor that the UI belongs to.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * An instance of the {@link module:ui/componentfactory~ComponentFactory}, a registry used by plugins\n\t\t * to register factories of specific UI components.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/componentfactory~ComponentFactory} #componentFactory\n\t\t */\n\t\tthis.componentFactory = new ComponentFactory( editor );\n\n\t\t/**\n\t\t * Stores the information about the editor UI focus and propagates it so various plugins and components\n\t\t * are unified as a focus group.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker} #focusTracker\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Stores all editable elements used by the editor instance.\n\t\t *\n\t\t * @private\n\t\t * @member {Map.<String,HTMLElement>}\n\t\t */\n\t\tthis._editableElementsMap = new Map();\n\n\t\t// Informs UI components that should be refreshed after layout change.\n\t\tthis.listenTo( editor.editing.view.document, 'layoutChanged', () => this.update() );\n\t}\n\n\t/**\n\t * The main (outermost) DOM element of the editor UI.\n\t *\n\t * For example, in {@link module:editor-classic/classiceditor~ClassicEditor} it is a `<div>` which\n\t * wraps the editable element and the toolbar. In {@link module:editor-inline/inlineeditor~InlineEditor}\n\t * it is the editable element itself (as there is no other wrapper). However, in\n\t * {@link module:editor-decoupled/decouplededitor~DecoupledEditor} it is set to `null` because this editor does not\n\t * come with a single \"main\" HTML element (its editable element and toolbar are separate).\n\t *\n\t * This property can be understood as a shorthand for retrieving the element that a specific editor integration\n\t * considers to be its main DOM element.\n\t *\n\t * @readonly\n\t * @member {HTMLElement|null} #element\n\t */\n\tget element() {\n\t\treturn null;\n\t}\n\n\t/**\n\t * Fires the {@link module:core/editor/editorui~EditorUI#event:update `update`} event.\n\t *\n\t * This method should be called when the editor UI (e.g. positions of its balloons) needs to be updated due to\n\t * some environmental change which CKEditor 5 is not aware of (e.g. resize of a container in which it is used).\n\t */\n\tupdate() {\n\t\tthis.fire( 'update' );\n\t}\n\n\t/**\n\t * Destroys the UI.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\n\t\tthis.focusTracker.destroy();\n\n\t\t// Clean–up the references to the CKEditor instance stored in the native editable DOM elements.\n\t\tfor ( const domElement of this._editableElementsMap.values() ) {\n\t\t\tdomElement.ckeditorInstance = null;\n\t\t}\n\n\t\tthis._editableElementsMap = new Map();\n\t}\n\n\t/**\n\t * Store the native DOM editable element used by the editor under\n\t * a unique name.\n\t *\n\t * @param {String} rootName The unique name of the editable element.\n\t * @param {HTMLElement} domElement The native DOM editable element.\n\t */\n\tsetEditableElement( rootName, domElement ) {\n\t\tthis._editableElementsMap.set( rootName, domElement );\n\n\t\t// Put a reference to the CKEditor instance in the editable native DOM element.\n\t\t// It helps 3rd–party software (browser extensions, other libraries) access and recognize\n\t\t// CKEditor 5 instances (editing roots) and use their API (there is no global editor\n\t\t// instance registry).\n\t\tif ( !domElement.ckeditorInstance ) {\n\t\t\tdomElement.ckeditorInstance = this.editor;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the editable editor element with the given name or null if editable does not exist.\n\t *\n\t * @param {String} [rootName=main] The editable name.\n\t * @returns {HTMLElement|undefined}\n\t */\n\tgetEditableElement( rootName = 'main' ) {\n\t\treturn this._editableElementsMap.get( rootName );\n\t}\n\n\t/**\n\t * Returns array of names of all editor editable elements.\n\t *\n\t * @returns {Iterable.<String>}\n\t */\n\tgetEditableElementsNames() {\n\t\treturn this._editableElementsMap.keys();\n\t}\n\n\t/**\n\t * Stores all editable elements used by the editor instance.\n\t *\n\t * @protected\n\t * @deprecated\n\t * @member {Map.<String,HTMLElement>}\n\t */\n\tget _editableElements() {\n\t\t/**\n\t\t * The {@link module:core/editor/editorui~EditorUI#_editableElements `EditorUI#_editableElements`} property has been\n\t\t * deprecated and will be removed in the near future. Please use {@link #setEditableElement `setEditableElement()`} and\n\t\t * {@link #getEditableElement `getEditableElement()`} methods instead.\n\t\t *\n\t\t * @error editor-ui-deprecated-editable-elements\n\t\t * @param {module:core/editor/editorui~EditorUI} editorUI Editor UI instance the deprecated property belongs to.\n\t\t */\n\t\tconsole.warn(\n\t\t\t'editor-ui-deprecated-editable-elements: ' +\n\t\t\t'The EditorUI#_editableElements property has been deprecated and will be removed in the near future.',\n\t\t\t{ editorUI: this } );\n\n\t\treturn this._editableElementsMap;\n\t}\n\n\t/**\n\t * Fired when the editor UI is ready.\n\t *\n\t * Fired before {@link module:engine/controller/datacontroller~DataController#event:ready}.\n\t *\n\t * @event ready\n\t */\n\n\t/**\n\t * Fired whenever the UI (all related components) should be refreshed.\n\t *\n\t * **Note:**: The event is fired after each {@link module:engine/view/document~Document#event:layoutChanged}.\n\t * It can also be fired manually via the {@link module:core/editor/editorui~EditorUI#update} method.\n\t *\n\t * @event update\n\t */\n}\n\nmix( EditorUI, EmitterMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/placeholder\n */\n\nimport '../../theme/placeholder.css';\n\n// Each document stores information about its placeholder elements and check functions.\nconst documentPlaceholders = new WeakMap();\n\n/**\n * A helper that enables a placeholder on the provided view element (also updates its visibility).\n * The placeholder is a CSS pseudo–element (with a text content) attached to the element.\n *\n * To change the placeholder text, simply call this method again with new options.\n *\n * To disable the placeholder, use {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} helper.\n *\n * @param {Object} [options] Configuration options of the placeholder.\n * @param {module:engine/view/view~View} options.view Editing view instance.\n * @param {module:engine/view/element~Element} options.element Element that will gain a placeholder.\n * See `options.isDirectHost` to learn more.\n * @param {String} options.text Placeholder text.\n * @param {Boolean} [options.isDirectHost=true] If set `false`, the placeholder will not be enabled directly\n * in the passed `element` but in one of its children (selected automatically, i.e. a first empty child element).\n * Useful when attaching placeholders to elements that can host other elements (not just text), for instance,\n * editable root elements.\n */\nexport function enablePlaceholder( options ) {\n\tconst { view, element, text, isDirectHost = true } = options;\n\tconst doc = view.document;\n\n\t// Use a single a single post fixer per—document to update all placeholders.\n\tif ( !documentPlaceholders.has( doc ) ) {\n\t\tdocumentPlaceholders.set( doc, new Map() );\n\n\t\t// If a post-fixer callback makes a change, it should return `true` so other post–fixers\n\t\t// can re–evaluate the document again.\n\t\tdoc.registerPostFixer( writer => updateDocumentPlaceholders( doc, writer ) );\n\t}\n\n\t// Store information about the element placeholder under its document.\n\tdocumentPlaceholders.get( doc ).set( element, {\n\t\ttext,\n\t\tisDirectHost\n\t} );\n\n\t// Update the placeholders right away.\n\tview.change( writer => updateDocumentPlaceholders( doc, writer ) );\n}\n\n/**\n * Disables the placeholder functionality from a given element.\n *\n * See {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} to learn more.\n *\n * @param {module:engine/view/view~View} view\n * @param {module:engine/view/element~Element} element\n */\nexport function disablePlaceholder( view, element ) {\n\tconst doc = element.document;\n\n\tview.change( writer => {\n\t\tif ( !documentPlaceholders.has( doc ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst placeholders = documentPlaceholders.get( doc );\n\t\tconst config = placeholders.get( element );\n\n\t\twriter.removeAttribute( 'data-placeholder', config.hostElement );\n\t\thidePlaceholder( writer, config.hostElement );\n\n\t\tplaceholders.delete( element );\n\t} );\n}\n\n/**\n * Shows a placeholder in the provided element by changing related attributes and CSS classes.\n *\n * **Note**: This helper will not update the placeholder visibility nor manage the\n * it in any way in the future. What it does is a one–time state change of an element. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} and\n * {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} for full\n * placeholder functionality.\n *\n * **Note**: This helper will blindly show the placeholder directly in the root editable element if\n * one is passed, which could result in a visual clash if the editable element has some children\n * (for instance, an empty paragraph). Use {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`}\n * in that case or make sure the correct element is passed to the helper.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean} `true`, if any changes were made to the `element`.\n */\nexport function showPlaceholder( writer, element ) {\n\tif ( !element.hasClass( 'ck-placeholder' ) ) {\n\t\twriter.addClass( 'ck-placeholder', element );\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n/**\n * Hides a placeholder in the element by changing related attributes and CSS classes.\n *\n * **Note**: This helper will not update the placeholder visibility nor manage the\n * it in any way in the future. What it does is a one–time state change of an element. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} and\n * {@link module:engine/view/placeholder~disablePlaceholder `disablePlaceholder()`} for full\n * placeholder functionality.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean} `true`, if any changes were made to the `element`.\n */\nexport function hidePlaceholder( writer, element ) {\n\tif ( element.hasClass( 'ck-placeholder' ) ) {\n\t\twriter.removeClass( 'ck-placeholder', element );\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n/**\n * Checks if a placeholder should be displayed in the element.\n *\n * **Note**: This helper will blindly check the possibility of showing a placeholder directly in the\n * root editable element if one is passed, which may not be the expected result. If an element can\n * host other elements (not just text), most likely one of its children should be checked instead\n * because it will be the final host for the placeholder. Use\n * {@link module:engine/view/placeholder~enablePlaceholder `enablePlaceholder()`} in that case or make\n * sure the correct element is passed to the helper.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {Boolean}\n */\nexport function needsPlaceholder( element ) {\n\tconst doc = element.document;\n\n\t// The element was removed from document.\n\tif ( !doc ) {\n\t\treturn false;\n\t}\n\n\t// The element is empty only as long as it contains nothing but uiElements.\n\tconst isEmptyish = !Array.from( element.getChildren() )\n\t\t.some( element => !element.is( 'uiElement' ) );\n\n\t// If the element is empty and the document is blurred.\n\tif ( !doc.isFocused && isEmptyish ) {\n\t\treturn true;\n\t}\n\n\tconst viewSelection = doc.selection;\n\tconst selectionAnchor = viewSelection.anchor;\n\n\t// If document is focused and the element is empty but the selection is not anchored inside it.\n\tif ( isEmptyish && selectionAnchor && selectionAnchor.parent !== element ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Updates all placeholders associated with a document in a post–fixer callback.\n//\n// @private\n// @param { module:engine/view/document~Document} doc\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {Boolean} True if any changes were made to the view document.\nfunction updateDocumentPlaceholders( doc, writer ) {\n\tconst placeholders = documentPlaceholders.get( doc );\n\tlet wasViewModified = false;\n\n\tfor ( const [ element, config ] of placeholders ) {\n\t\tif ( updatePlaceholder( writer, element, config ) ) {\n\t\t\twasViewModified = true;\n\t\t}\n\t}\n\n\treturn wasViewModified;\n}\n\n// Updates a single placeholder in a post–fixer callback.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:engine/view/element~Element} element\n// @param {Object} config Configuration of the placeholder\n// @param {String} config.text\n// @param {Boolean} config.isDirectHost\n// @returns {Boolean} True if any changes were made to the view document.\nfunction updatePlaceholder( writer, element, config ) {\n\tconst { text, isDirectHost } = config;\n\tconst hostElement = isDirectHost ? element : getChildPlaceholderHostSubstitute( element );\n\tlet wasViewModified = false;\n\n\t// When not a direct host, it could happen that there is no child element\n\t// capable of displaying a placeholder.\n\tif ( !hostElement ) {\n\t\treturn false;\n\t}\n\n\t// Cache the host element. It will be necessary for disablePlaceholder() to know\n\t// which element should have class and attribute removed because, depending on\n\t// the config.isDirectHost value, it could be the element or one of its descendants.\n\tconfig.hostElement = hostElement;\n\n\t// This may be necessary when updating the placeholder text to something else.\n\tif ( hostElement.getAttribute( 'data-placeholder' ) !== text ) {\n\t\twriter.setAttribute( 'data-placeholder', text, hostElement );\n\t\twasViewModified = true;\n\t}\n\n\tif ( needsPlaceholder( hostElement ) ) {\n\t\tif ( showPlaceholder( writer, hostElement ) ) {\n\t\t\twasViewModified = true;\n\t\t}\n\t} else if ( hidePlaceholder( writer, hostElement ) ) {\n\t\twasViewModified = true;\n\t}\n\n\treturn wasViewModified;\n}\n\n// Gets a child element capable of displaying a placeholder if a parent element can host more\n// than just text (for instance, when it is a root editable element). The child element\n// can then be used in other placeholder helpers as a substitute of its parent.\n//\n// @private\n// @param {module:engine/view/element~Element} parent\n// @returns {module:engine/view/element~Element|null}\nfunction getChildPlaceholderHostSubstitute( parent ) {\n\tif ( parent.childCount === 1 ) {\n\t\tconst firstChild = parent.getChild( 0 );\n\n\t\tif ( firstChild.is( 'element' ) && !firstChild.is( 'uiElement' ) ) {\n\t\t\treturn firstChild;\n\t\t}\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/elementreplacer\n */\n\n/**\n * Utility class allowing to hide existing HTML elements or replace them with given ones in a way that doesn't remove\n * the original elements from the DOM.\n */\nexport default class ElementReplacer {\n\tconstructor() {\n\t\t/**\n\t\t * The elements replaced by {@link #replace} and their replacements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.<Object>}\n\t\t */\n\t\tthis._replacedElements = [];\n\t}\n\n\t/**\n\t * Hides the `element` and, if specified, inserts the the given element next to it.\n\t *\n\t * The effect of this method can be reverted by {@link #restore}.\n\t *\n\t * @param {HTMLElement} element The element to replace.\n\t * @param {HTMLElement} [newElement] The replacement element. If not passed, then the `element` will just be hidden.\n\t */\n\treplace( element, newElement ) {\n\t\tthis._replacedElements.push( { element, newElement } );\n\n\t\telement.style.display = 'none';\n\n\t\tif ( newElement ) {\n\t\t\telement.parentNode.insertBefore( newElement, element.nextSibling );\n\t\t}\n\t}\n\n\t/**\n\t * Restores what {@link #replace} did.\n\t */\n\trestore() {\n\t\tthis._replacedElements.forEach( ( { element, newElement } ) => {\n\t\t\telement.style.display = '';\n\n\t\t\tif ( newElement ) {\n\t\t\t\tnewElement.remove();\n\t\t\t}\n\t\t} );\n\n\t\tthis._replacedElements = [];\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditorui\n */\n\nimport EditorUI from '@ckeditor/ckeditor5-core/src/editor/editorui';\nimport enableToolbarKeyboardFocus from '@ckeditor/ckeditor5-ui/src/toolbar/enabletoolbarkeyboardfocus';\nimport normalizeToolbarConfig from '@ckeditor/ckeditor5-ui/src/toolbar/normalizetoolbarconfig';\nimport { enablePlaceholder } from '@ckeditor/ckeditor5-engine/src/view/placeholder';\nimport ElementReplacer from '@ckeditor/ckeditor5-utils/src/elementreplacer';\n\n/**\n * The classic editor UI class.\n *\n * @extends module:core/editor/editorui~EditorUI\n */\nexport default class ClassicEditorUI extends EditorUI {\n\t/**\n\t * Creates an instance of the classic editor UI class.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {module:ui/editorui/editoruiview~EditorUIView} view The view of the UI.\n\t */\n\tconstructor( editor, view ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The main (top–most) view of the editor UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/editorui/editoruiview~EditorUIView} #view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * A normalized `config.toolbar` object.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._toolbarConfig = normalizeToolbarConfig( editor.config.get( 'toolbar' ) );\n\n\t\t/**\n\t\t * The element replacer instance used to hide the editor's source element.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:utils/elementreplacer~ElementReplacer}\n\t\t */\n\t\tthis._elementReplacer = new ElementReplacer();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget element() {\n\t\treturn this.view.element;\n\t}\n\n\t/**\n\t * Initializes the UI.\n\t *\n\t * @param {HTMLElement|null} replacementElement The DOM element that will be the source for the created editor.\n\t */\n\tinit( replacementElement ) {\n\t\tconst editor = this.editor;\n\t\tconst view = this.view;\n\t\tconst editingView = editor.editing.view;\n\t\tconst editable = view.editable;\n\t\tconst editingRoot = editingView.document.getRoot();\n\n\t\t// The editable UI and editing root should share the same name. Then name is used\n\t\t// to recognize the particular editable, for instance in ARIA attributes.\n\t\teditable.name = editingRoot.rootName;\n\n\t\tview.render();\n\n\t\t// The editable UI element in DOM is available for sure only after the editor UI view has been rendered.\n\t\t// But it can be available earlier if a DOM element has been passed to BalloonEditor.create().\n\t\tconst editableElement = editable.element;\n\n\t\t// Register the editable UI view in the editor. A single editor instance can aggregate multiple\n\t\t// editable areas (roots) but the classic editor has only one.\n\t\tthis.setEditableElement( editable.name, editableElement );\n\n\t\t// Let the global focus tracker know that the editable UI element is focusable and\n\t\t// belongs to the editor. From now on, the focus tracker will sustain the editor focus\n\t\t// as long as the editable is focused (e.g. the user is typing).\n\t\tthis.focusTracker.add( editableElement );\n\n\t\t// Let the editable UI element respond to the changes in the global editor focus\n\t\t// tracker. It has been added to the same tracker a few lines above but, in reality, there are\n\t\t// many focusable areas in the editor, like balloons, toolbars or dropdowns and as long\n\t\t// as they have focus, the editable should act like it is focused too (although technically\n\t\t// it isn't), e.g. by setting the proper CSS class, visually announcing focus to the user.\n\t\t// Doing otherwise will result in editable focus styles disappearing, once e.g. the\n\t\t// toolbar gets focused.\n\t\tview.editable.bind( 'isFocused' ).to( this.focusTracker );\n\n\t\t// Bind the editable UI element to the editing view, making it an end– and entry–point\n\t\t// of the editor's engine. This is where the engine meets the UI.\n\t\teditingView.attachDomRoot( editableElement );\n\n\t\t// If an element containing the initial data of the editor was provided, replace it with\n\t\t// an editor instance's UI in DOM until the editor is destroyed. For instance, a <textarea>\n\t\t// can be such element.\n\t\tif ( replacementElement ) {\n\t\t\tthis._elementReplacer.replace( replacementElement, this.element );\n\t\t}\n\n\t\tthis._initPlaceholder();\n\t\tthis._initToolbar();\n\t\tthis.fire( 'ready' );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tconst view = this.view;\n\t\tconst editingView = this.editor.editing.view;\n\n\t\tthis._elementReplacer.restore();\n\t\teditingView.detachDomRoot( view.editable.name );\n\t\tview.destroy();\n\n\t\tsuper.destroy();\n\t}\n\n\t/**\n\t * Initializes the editor toolbar.\n\t *\n\t * @private\n\t */\n\t_initToolbar() {\n\t\tconst editor = this.editor;\n\t\tconst view = this.view;\n\t\tconst editingView = editor.editing.view;\n\n\t\t// Set–up the sticky panel with toolbar.\n\t\tview.stickyPanel.bind( 'isActive' ).to( this.focusTracker, 'isFocused' );\n\t\tview.stickyPanel.limiterElement = view.element;\n\n\t\tif ( this._toolbarConfig.viewportTopOffset ) {\n\t\t\tview.stickyPanel.viewportTopOffset = this._toolbarConfig.viewportTopOffset;\n\t\t}\n\n\t\tview.toolbar.fillFromConfig( this._toolbarConfig.items, this.componentFactory );\n\n\t\tenableToolbarKeyboardFocus( {\n\t\t\torigin: editingView,\n\t\t\toriginFocusTracker: this.focusTracker,\n\t\t\toriginKeystrokeHandler: editor.keystrokes,\n\t\t\ttoolbar: view.toolbar\n\t\t} );\n\t}\n\n\t/**\n\t * Enable the placeholder text on the editing root, if any was configured.\n\t *\n\t * @private\n\t */\n\t_initPlaceholder() {\n\t\tconst editor = this.editor;\n\t\tconst editingView = editor.editing.view;\n\t\tconst editingRoot = editingView.document.getRoot();\n\t\tconst sourceElement = editor.sourceElement;\n\n\t\tconst placeholderText = editor.config.get( 'placeholder' ) ||\n\t\t\tsourceElement && sourceElement.tagName.toLowerCase() === 'textarea' && sourceElement.getAttribute( 'placeholder' );\n\n\t\tif ( placeholderText ) {\n\t\t\tenablePlaceholder( {\n\t\t\t\tview: editingView,\n\t\t\t\telement: editingRoot,\n\t\t\t\ttext: placeholderText,\n\t\t\t\tisDirectHost: false\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/normalizetoolbarconfig\n */\n\n/**\n * Normalizes the toolbar configuration (`config.toolbar`), which:\n *\n * * may be defined as an `Array`:\n *\n * \t\ttoolbar: [ 'heading', 'bold', 'italic', 'link', ... ]\n *\n * * or an `Object`:\n *\n *\t\ttoolbar: {\n *\t\t\titems: [ 'heading', 'bold', 'italic', 'link', ... ],\n *\t\t\t...\n *\t\t}\n *\n * * or may not be defined at all (`undefined`)\n *\n * and returns it in the object form.\n *\n * @param {Array|Object|undefined} config The value of `config.toolbar`.\n * @returns {Object} A normalized toolbar config object.\n */\nexport default function normalizeToolbarConfig( config ) {\n\tif ( Array.isArray( config ) ) {\n\t\treturn {\n\t\t\titems: config\n\t\t};\n\t}\n\n\tif ( !config ) {\n\t\treturn {\n\t\t\titems: []\n\t\t};\n\t}\n\n\treturn Object.assign( {\n\t\titems: []\n\t}, config );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/enabletoolbarkeyboardfocus\n */\n\n/**\n * Enables focus/blur toolbar navigation using `Alt+F10` and `Esc` keystrokes.\n *\n * @param {Object} options Options of the utility.\n * @param {*} options.origin A view to which the focus will return when `Esc` is pressed and\n * `options.toolbar` is focused.\n * @param {module:utils/keystrokehandler~KeystrokeHandler} options.originKeystrokeHandler A keystroke\n * handler to register `Alt+F10` keystroke.\n * @param {module:utils/focustracker~FocusTracker} options.originFocusTracker A focus tracker\n * for `options.origin`.\n * @param {module:ui/toolbar/toolbarview~ToolbarView} options.toolbar A toolbar which is to gain\n * focus when `Alt+F10` is pressed.\n * @param {Function} [options.beforeFocus] A callback executed before the `options.toolbar` gains focus\n * upon the `Alt+F10` keystroke.\n * @param {Function} [options.afterBlur] A callback executed after `options.toolbar` loses focus upon\n * `Esc` keystroke but before the focus goes back to `options.origin`.\n */\nexport default function enableToolbarKeyboardFocus( {\n\torigin,\n\toriginKeystrokeHandler,\n\toriginFocusTracker,\n\ttoolbar,\n\tbeforeFocus,\n\tafterBlur\n} ) {\n\t// Because toolbar items can get focus, the overall state of the toolbar must\n\t// also be tracked.\n\toriginFocusTracker.add( toolbar.element );\n\n\t// Focus the toolbar on the keystroke, if not already focused.\n\toriginKeystrokeHandler.set( 'Alt+F10', ( data, cancel ) => {\n\t\tif ( originFocusTracker.isFocused && !toolbar.focusTracker.isFocused ) {\n\t\t\tif ( beforeFocus ) {\n\t\t\t\tbeforeFocus();\n\t\t\t}\n\n\t\t\ttoolbar.focus();\n\n\t\t\tcancel();\n\t\t}\n\t} );\n\n\t// Blur the toolbar and bring the focus back to origin.\n\ttoolbar.keystrokes.set( 'Esc', ( data, cancel ) => {\n\t\tif ( toolbar.focusTracker.isFocused ) {\n\t\t\torigin.focus();\n\n\t\t\tif ( afterBlur ) {\n\t\t\t\tafterBlur();\n\t\t\t}\n\n\t\t\tcancel();\n\t\t}\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/viewcollection\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\n\n/**\n * Collects {@link module:ui/view~View} instances.\n *\n *\t\tconst parentView = new ParentView( locale );\n *\t\tconst collection = new ViewCollection( locale );\n *\n *\t\tcollection.setParent( parentView.element );\n *\n *\t\tconst viewA = new ChildView( locale );\n *\t\tconst viewB = new ChildView( locale );\n *\n * View collection renders and manages view {@link module:ui/view~View#element elements}:\n *\n *\t\tcollection.add( viewA );\n *\t\tcollection.add( viewB );\n *\n *\t\tconsole.log( parentView.element.firsChild ); // -> viewA.element\n *\t\tconsole.log( parentView.element.lastChild ); // -> viewB.element\n *\n * It {@link module:ui/viewcollection~ViewCollection#delegate propagates} DOM events too:\n *\n *\t\t// Delegate #click and #keydown events from viewA and viewB to the parentView.\n *\t\tcollection.delegate( 'click' ).to( parentView );\n *\n *\t\tparentView.on( 'click', ( evt ) => {\n *\t\t\tconsole.log( `${ evt.source } has been clicked.` );\n *\t\t} );\n *\n *\t\t// This event will be delegated to the parentView.\n *\t\tviewB.fire( 'click' );\n *\n * **Note**: A view collection can be used directly in the {@link module:ui/template~TemplateDefinition definition}\n * of a {@link module:ui/template~Template template}.\n *\n * @extends module:utils/collection~Collection\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class ViewCollection extends Collection {\n\t/**\n\t * Creates a new instance of the {@link module:ui/viewcollection~ViewCollection}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The {@link module:core/editor/editor~Editor editor's locale} instance.\n\t */\n\tconstructor( locale ) {\n\t\tsuper( {\n\t\t\t// An #id Number attribute should be legal and not break the `ViewCollection` instance.\n\t\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/93\n\t\t\tidProperty: 'viewUid'\n\t\t} );\n\n\t\t// Handle {@link module:ui/view~View#element} in DOM when a new view is added to the collection.\n\t\tthis.on( 'add', ( evt, view, index ) => {\n\t\t\tif ( !view.isRendered ) {\n\t\t\t\tview.render();\n\t\t\t}\n\n\t\t\tif ( view.element && this._parentElement ) {\n\t\t\t\tthis._parentElement.insertBefore( view.element, this._parentElement.children[ index ] );\n\t\t\t}\n\t\t} );\n\n\t\t// Handle {@link module:ui/view~View#element} in DOM when a view is removed from the collection.\n\t\tthis.on( 'remove', ( evt, view ) => {\n\t\t\tif ( view.element && this._parentElement ) {\n\t\t\t\tview.element.remove();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * The {@link module:core/editor/editor~Editor#locale editor's locale} instance.\n\t\t * See the view {@link module:ui/view~View#locale locale} property.\n\t\t *\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * A parent element within which child views are rendered and managed in DOM.\n\t\t *\n\t\t * @protected\n\t\t * @member {HTMLElement}\n\t\t */\n\t\tthis._parentElement = null;\n\t}\n\n\t/**\n\t * Destroys the view collection along with child views.\n\t * See the view {@link module:ui/view~View#destroy} method.\n\t */\n\tdestroy() {\n\t\tthis.map( view => view.destroy() );\n\t}\n\n\t/**\n\t * Sets the parent HTML element of this collection. When parent is set, {@link #add adding} and\n\t * {@link #remove removing} views in the collection synchronizes their\n\t * {@link module:ui/view~View#element elements} in the parent element.\n\t *\n\t * @param {HTMLElement} element A new parent element.\n\t */\n\tsetParent( elementOrDocFragment ) {\n\t\tthis._parentElement = elementOrDocFragment;\n\t}\n\n\t/**\n\t * Delegates selected events coming from within views in the collection to any\n\t * {@link module:utils/emittermixin~Emitter}.\n\t *\n\t * For the following views and collection:\n\t *\n\t *\t\tconst viewA = new View();\n\t *\t\tconst viewB = new View();\n\t *\t\tconst viewC = new View();\n\t *\n\t *\t\tconst views = parentView.createCollection();\n\t *\n\t *\t\tviews.delegate( 'eventX' ).to( viewB );\n\t *\t\tviews.delegate( 'eventX', 'eventY' ).to( viewC );\n\t *\n\t *\t\tviews.add( viewA );\n\t *\n\t * the `eventX` is delegated (fired by) `viewB` and `viewC` along with `customData`:\n\t *\n\t *\t\tviewA.fire( 'eventX', customData );\n\t *\n\t * and `eventY` is delegated (fired by) `viewC` along with `customData`:\n\t *\n\t *\t\tviewA.fire( 'eventY', customData );\n\t *\n\t * See {@link module:utils/emittermixin~Emitter#delegate}.\n\t *\n\t * @param {...String} events {@link module:ui/view~View} event names to be delegated to another\n\t * {@link module:utils/emittermixin~Emitter}.\n\t * @returns {Object}\n\t * @returns {Function} return.to A function which accepts the destination of\n\t * {@link module:utils/emittermixin~Emitter#delegate delegated} events.\n\t */\n\tdelegate( ...events ) {\n\t\tif ( !events.length || !isStringArray( events ) ) {\n\t\t\t/**\n\t\t\t * All event names must be strings.\n\t\t\t *\n\t\t\t * @error ui-viewcollection-delegate-wrong-events\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-viewcollection-delegate-wrong-events: All event names must be strings.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\treturn {\n\t\t\t/**\n\t\t\t * Selects destination for {@link module:utils/emittermixin~Emitter#delegate} events.\n\t\t\t *\n\t\t\t * @memberOf module:ui/viewcollection~ViewCollection#delegate\n\t\t\t * @function module:ui/viewcollection~ViewCollection#delegate.to\n\t\t\t * @param {module:utils/emittermixin~Emitter} dest An `Emitter` instance which is\n\t\t\t * the destination for delegated events.\n\t\t\t */\n\t\t\tto: dest => {\n\t\t\t\t// Activate delegating on existing views in this collection.\n\t\t\t\tfor ( const view of this ) {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.delegate( evtName ).to( dest );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Activate delegating on future views in this collection.\n\t\t\t\tthis.on( 'add', ( evt, view ) => {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.delegate( evtName ).to( dest );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t\t// Deactivate delegating when view is removed from this collection.\n\t\t\t\tthis.on( 'remove', ( evt, view ) => {\n\t\t\t\t\tfor ( const evtName of events ) {\n\t\t\t\t\t\tview.stopDelegating( evtName, dest );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Removes a child view from the collection. If the {@link #setParent parent element} of the\n\t * collection has been set, the {@link module:ui/view~View#element element} of the view is also removed\n\t * in DOM, reflecting the order of the collection.\n\t *\n\t * See the {@link #add} method.\n\t *\n\t * @method #remove\n\t * @param {module:ui/view~View|Number|String} subject The view to remove, its id or index in the collection.\n\t * @returns {Object} The removed view.\n\t */\n}\n\n// Check if all entries of the array are of `String` type.\n//\n// @private\n// @param {Array} arr An array to be checked.\n// @returns {Boolean}\nfunction isStringArray( arr ) {\n\treturn arr.every( a => typeof a == 'string' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/template\n */\n\n/* global document */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport View from './view';\nimport ViewCollection from './viewcollection';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport { isObject, cloneDeepWith } from 'lodash-es';\n\nconst xhtmlNs = 'http://www.w3.org/1999/xhtml';\n\n/**\n * A basic Template class. It renders a DOM HTML element or text from a\n * {@link module:ui/template~TemplateDefinition definition} and supports element attributes, children,\n * bindings to {@link module:utils/observablemixin~Observable observables} and DOM event propagation.\n *\n * A simple template can look like this:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\tclass: 'foo',\n *\t\t\t\tstyle: {\n *\t\t\t\t\tbackgroundColor: 'yellow'\n *\t\t\t\t}\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t'A paragraph.'\n *\t\t\t]\n *\t\t} ).render();\n *\n * and it will render the following HTML element:\n *\n *\t\t<p class=\"foo\" style=\"background-color: yellow;\">A paragraph.</p>\n *\n * Additionally, the `observable` will always fire `clicked` upon clicking `<p>` in the DOM.\n *\n * See {@link module:ui/template~TemplateDefinition} to know more about templates and complex\n * template definitions.\n *\n* @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Template {\n\t/**\n\t * Creates an instance of the {@link ~Template} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the template.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, normalize( clone( def ) ) );\n\n\t\t/**\n\t\t * Indicates whether this particular Template instance has been\n\t\t * {@link #render rendered}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._isRendered = false;\n\n\t\t/**\n\t\t * The tag (`tagName`) of this template, e.g. `div`. It also indicates that the template\n\t\t * renders to an HTML element.\n\t\t *\n\t\t * @member {String} #tag\n\t\t */\n\n\t\t/**\n\t\t * The text of the template. It also indicates that the template renders to a DOM text node.\n\t\t *\n\t\t * @member {Array.<String|module:ui/template~TemplateValueSchema>} #text\n\t\t */\n\n\t\t/**\n\t\t * The attributes of the template, e.g. `{ id: [ 'ck-id' ] }`, corresponding with\n\t\t * the attributes of an HTML element.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {Object} #attributes\n\t\t */\n\n\t\t/**\n\t\t * The children of the template. They can be either:\n\t\t * * independent instances of {@link ~Template} (sub–templates),\n\t\t * * native DOM Nodes.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {Array.<module:ui/template~Template|Node>} #children\n\t\t */\n\n\t\t/**\n\t\t * The DOM event listeners of the template.\n\t\t *\n\t\t * @member {Object} #eventListeners\n\t\t */\n\n\t\t/**\n\t\t * The data used by the {@link #revert} method to restore a node to its original state.\n\t\t *\n\t\t * See: {@link #apply}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/template~RenderData}\n\t\t */\n\t\tthis._revertData = null;\n\t}\n\n\t/**\n\t * Renders a DOM Node (an HTML element or text) out of the template.\n\t *\n\t *\t\tconst domNode = new Template( { ... } ).render();\n\t *\n\t * See: {@link #apply}.\n\t *\n\t * @returns {HTMLElement|Text}\n\t */\n\trender() {\n\t\tconst node = this._renderNode( {\n\t\t\tintoFragment: true\n\t\t} );\n\n\t\tthis._isRendered = true;\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Applies the template to an existing DOM Node, either HTML element or text.\n\t *\n\t * **Note:** No new DOM nodes will be created. Applying extends:\n\t *\n\t * {@link module:ui/template~TemplateDefinition attributes},\n\t * {@link module:ui/template~TemplateDefinition event listeners}, and\n\t * `textContent` of {@link module:ui/template~TemplateDefinition children} only.\n\t *\n\t * **Note:** Existing `class` and `style` attributes are extended when a template\n\t * is applied to an HTML element, while other attributes and `textContent` are overridden.\n\t *\n\t * **Note:** The process of applying a template can be easily reverted using the\n\t * {@link module:ui/template~Template#revert} method.\n\t *\n\t *\t\tconst element = document.createElement( 'div' );\n\t *\t\tconst observable = new Model( { divClass: 'my-div' } );\n\t *\t\tconst emitter = Object.create( EmitterMixin );\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tid: 'first-div',\n\t *\t\t\t\tclass: bind.to( 'divClass' )\n\t *\t\t\t},\n\t *\t\t\ton: {\n\t *\t\t\t\tclick: bind( 'elementClicked' ) // Will be fired by the observable.\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t'Div text.'\n\t *\t\t\t]\n\t *\t\t} ).apply( element );\n\t *\n\t *\t\tconsole.log( element.outerHTML ); // -> '<div id=\"first-div\" class=\"my-div\"></div>'\n\t *\n\t * @see module:ui/template~Template#render\n\t * @see module:ui/template~Template#revert\n\t * @param {Node} node Root node for the template to apply.\n\t */\n\tapply( node ) {\n\t\tthis._revertData = getEmptyRevertData();\n\n\t\tthis._renderNode( {\n\t\t\tnode,\n\t\t\tisApplying: true,\n\t\t\trevertData: this._revertData\n\t\t} );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Reverts a template {@link module:ui/template~Template#apply applied} to a DOM node.\n\t *\n\t * @param {Node} node The root node for the template to revert. In most of the cases, it is the\n\t * same node used by {@link module:ui/template~Template#apply}.\n\t */\n\trevert( node ) {\n\t\tif ( !this._revertData ) {\n\t\t\t/**\n\t\t\t * Attempting to revert a template which has not been applied yet.\n\t\t\t *\n\t\t\t * @error ui-template-revert-not-applied\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-revert-not-applied: Attempting to revert a template which has not been applied yet.',\n\t\t\t\t[ this, node ]\n\t\t\t);\n\t\t}\n\n\t\tthis._revertTemplateFromNode( node, this._revertData );\n\t}\n\n\t/**\n\t * Returns an iterator which traverses the template in search of {@link module:ui/view~View}\n\t * instances and returns them one by one.\n\t *\n\t *\t\tconst viewFoo = new View();\n\t *\t\tconst viewBar = new View();\n\t *\t\tconst viewBaz = new View();\n\t *\t\tconst template = new Template( {\n\t *\t\t\ttag: 'div',\n\t *\t\t\tchildren: [\n\t *\t\t\t\tviewFoo,\n\t *\t\t\t\t{\n\t *\t\t\t\t\ttag: 'div',\n\t *\t\t\t\t\tchildren: [\n\t *\t\t\t\t\t\tviewBar\n\t *\t\t\t\t\t]\n\t *\t\t\t\t},\n\t *\t\t\t\tviewBaz\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Logs: viewFoo, viewBar, viewBaz\n\t *\t\tfor ( const view of template.getViews() ) {\n\t *\t\t\tconsole.log( view );\n\t *\t\t}\n\t *\n\t * @returns {Iterable.<module:ui/view~View>}\n\t */\n\t* getViews() {\n\t\tfunction* search( def ) {\n\t\t\tif ( def.children ) {\n\t\t\t\tfor ( const child of def.children ) {\n\t\t\t\t\tif ( isView( child ) ) {\n\t\t\t\t\t\tyield child;\n\t\t\t\t\t} else if ( isTemplate( child ) ) {\n\t\t\t\t\t\tyield* search( child );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tyield* search( this );\n\t}\n\n\t/**\n\t * An entry point to the interface which binds DOM nodes to\n\t * {@link module:utils/observablemixin~Observable observables}.\n\t * There are two types of bindings:\n\t *\n\t * * HTML element attributes or text `textContent` synchronized with attributes of an\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}\n\t * and {@link module:ui/template~BindChain#if}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\t// Binds the element \"class\" attribute to observable#classAttribute.\n\t *\t\t\t\tclass: bind.to( 'classAttribute' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * * DOM events fired on HTML element propagated through\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\ton: {\n\t *\t\t\t\t// Will be fired by the observable.\n\t *\t\t\t\tclick: bind( 'elementClicked' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * Also see {@link module:ui/view~View#bindTemplate}.\n\t *\n\t * @param {module:utils/observablemixin~Observable} observable An observable which provides boundable attributes.\n\t * @param {module:utils/emittermixin~Emitter} emitter An emitter that listens to observable attribute\n\t * changes or DOM Events (depending on the kind of the binding). Usually, a {@link module:ui/view~View} instance.\n\t * @returns {module:ui/template~BindChain}\n\t */\n\tstatic bind( observable, emitter ) {\n\t\treturn {\n\t\t\tto( eventNameOrFunctionOrAttribute, callback ) {\n\t\t\t\treturn new TemplateToBinding( {\n\t\t\t\t\teventNameOrFunction: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tattribute: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tobservable, emitter, callback\n\t\t\t\t} );\n\t\t\t},\n\n\t\t\tif( attribute, valueIfTrue, callback ) {\n\t\t\t\treturn new TemplateIfBinding( {\n\t\t\t\t\tobservable, emitter, attribute, valueIfTrue, callback\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Extends an existing {@link module:ui/template~Template} instance with some additional content\n\t * from another {@link module:ui/template~TemplateDefinition}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tconst template = new Template( {\n\t *\t\t\ttag: 'p',\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'a',\n\t *\t\t\t\tdata-x: bind.to( 'foo' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\ttag: 'span',\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'b'\n\t *\t\t\t\t\t},\n\t *\t\t\t\t\tchildren: [\n\t *\t\t\t\t\t\t'Span'\n\t *\t\t\t\t\t]\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t } );\n\t *\n\t *\t\t// Instance-level extension.\n\t *\t\tTemplate.extend( template, {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'b',\n\t *\t\t\t\tdata-x: bind.to( 'bar' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'c'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Child extension.\n\t *\t\tTemplate.extend( template.children[ 0 ], {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'd'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * the `outerHTML` of `template.render()` is:\n\t *\n\t *\t\t<p class=\"a b\" data-x=\"{ observable.foo } { observable.bar }\">\n\t *\t\t\t<span class=\"b c d\">Span</span>\n\t *\t\t</p>\n\t *\n\t * @param {module:ui/template~Template} template An existing template instance to be extended.\n\t * @param {module:ui/template~TemplateDefinition} def Additional definition to be applied to a template.\n\t */\n\tstatic extend( template, def ) {\n\t\tif ( template._isRendered ) {\n\t\t\t/**\n\t\t\t * Extending a template after rendering may not work as expected. To make sure\n\t\t\t * the {@link module:ui/template~Template.extend extending} works for an element,\n\t\t\t * make sure it happens before {@link #render} is called.\n\t\t\t *\n\t\t\t * @error template-extend-render\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'template-extend-render: Attempting to extend a template which has already been rendered.',\n\t\t\t\t[ this, template ]\n\t\t\t);\n\t\t}\n\n\t\textendTemplate( template, normalize( clone( def ) ) );\n\t}\n\n\t/**\n\t * Renders a DOM Node (either an HTML element or text) out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderNode( data ) {\n\t\tlet isInvalid;\n\n\t\tif ( data.node ) {\n\t\t\t// When applying, a definition cannot have \"tag\" and \"text\" at the same time.\n\t\t\tisInvalid = this.tag && this.text;\n\t\t} else {\n\t\t\t// When rendering, a definition must have either \"tag\" or \"text\": XOR( this.tag, this.text ).\n\t\t\tisInvalid = this.tag ? this.text : !this.text;\n\t\t}\n\n\t\tif ( isInvalid ) {\n\t\t\t/**\n\t\t\t * Node definition cannot have the \"tag\" and \"text\" properties at the same time.\n\t\t\t * Node definition must have either \"tag\" or \"text\" when rendering a new Node.\n\t\t\t *\n\t\t\t * @error ui-template-wrong-syntax\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-wrong-syntax: Node definition must have either \"tag\" or \"text\" when rendering a new Node.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\tif ( this.text ) {\n\t\t\treturn this._renderText( data );\n\t\t} else {\n\t\t\treturn this._renderElement( data );\n\t\t}\n\t}\n\n\t/**\n\t * Renders an HTML element out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElement( data ) {\n\t\tlet node = data.node;\n\n\t\tif ( !node ) {\n\t\t\tnode = data.node = document.createElementNS( this.ns || xhtmlNs, this.tag );\n\t\t}\n\n\t\tthis._renderAttributes( data );\n\t\tthis._renderElementChildren( data );\n\t\tthis._setUpListeners( data );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders a text node out of {@link module:ui/template~Template#text}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderText( data ) {\n\t\tlet node = data.node;\n\n\t\t// Save the original textContent to revert it in #revert().\n\t\tif ( node ) {\n\t\t\tdata.revertData.text = node.textContent;\n\t\t} else {\n\t\t\tnode = data.node = document.createTextNode( '' );\n\t\t}\n\n\t\t// Check if this Text Node is bound to Observable. Cases:\n\t\t//\n\t\t//\t\ttext: [ Template.bind( ... ).to( ... ) ]\n\t\t//\n\t\t//\t\ttext: [\n\t\t//\t\t\t'foo',\n\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t//\t\t\t...\n\t\t//\t\t]\n\t\t//\n\t\tif ( hasTemplateBinding( this.text ) ) {\n\t\t\tthis._bindToObservable( {\n\t\t\t\tschema: this.text,\n\t\t\t\tupdater: getTextUpdater( node ),\n\t\t\t\tdata\n\t\t\t} );\n\t\t}\n\t\t// Simply set text. Cases:\n\t\t//\n\t\t//\t\ttext: [ 'all', 'are', 'static' ]\n\t\t//\n\t\t//\t\ttext: [ 'foo' ]\n\t\t//\n\t\telse {\n\t\t\tnode.textContent = this.text.join( '' );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders HTML element attributes out of {@link module:ui/template~Template#attributes}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderAttributes( data ) {\n\t\tlet attrName, attrValue, domAttrValue, attrNs;\n\n\t\tif ( !this.attributes ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst node = data.node;\n\t\tconst revertData = data.revertData;\n\n\t\tfor ( attrName in this.attributes ) {\n\t\t\t// Current attribute value in DOM.\n\t\t\tdomAttrValue = node.getAttribute( attrName );\n\n\t\t\t// The value to be set.\n\t\t\tattrValue = this.attributes[ attrName ];\n\n\t\t\t// Save revert data.\n\t\t\tif ( revertData ) {\n\t\t\t\trevertData.attributes[ attrName ] = domAttrValue;\n\t\t\t}\n\n\t\t\t// Detect custom namespace:\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tattrNs = ( isObject( attrValue[ 0 ] ) && attrValue[ 0 ].ns ) ? attrValue[ 0 ].ns : null;\n\n\t\t\t// Activate binding if one is found. Cases:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'bar',\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t\t//\t\t\t'baz'\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( attrValue ) ) {\n\t\t\t\t// Normalize attributes with additional data like namespace:\n\t\t\t\t//\n\t\t\t\t//\t\tclass: {\n\t\t\t\t//\t\t\tns: 'abc',\n\t\t\t\t//\t\t\tvalue: [ ... ]\n\t\t\t\t//\t\t}\n\t\t\t\t//\n\t\t\t\tconst valueToBind = attrNs ? attrValue[ 0 ].value : attrValue;\n\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && shouldExtend( attrName ) ) {\n\t\t\t\t\tvalueToBind.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: valueToBind,\n\t\t\t\t\tupdater: getAttributeUpdater( node, attrName, attrNs ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Style attribute could be an Object so it needs to be parsed in a specific way.\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\twidth: '100px',\n\t\t\t//\t\t\theight: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse if ( attrName == 'style' && typeof attrValue[ 0 ] !== 'string' ) {\n\t\t\t\tthis._renderStyleAttribute( attrValue[ 0 ], data );\n\t\t\t}\n\n\t\t\t// Otherwise simply set the static attribute:\n\t\t\t//\n\t\t\t//\t\tclass: [ 'foo' ]\n\t\t\t//\n\t\t\t//\t\tclass: [ 'all', 'are', 'static' ]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t{\n\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t//\t\t\t\tvalue: [ 'foo' ]\n\t\t\t//\t\t\t}\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\telse {\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && domAttrValue && shouldExtend( attrName ) ) {\n\t\t\t\t\tattrValue.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tattrValue = attrValue\n\t\t\t\t\t// Retrieve \"values\" from:\n\t\t\t\t\t//\n\t\t\t\t\t//\t\tclass: [\n\t\t\t\t\t//\t\t\t{\n\t\t\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t\t\t//\t\t\t\tvalue: [ ... ]\n\t\t\t\t\t//\t\t\t}\n\t\t\t\t\t//\t\t]\n\t\t\t\t\t//\n\t\t\t\t\t.map( val => val ? ( val.value || val ) : val )\n\t\t\t\t\t// Flatten the array.\n\t\t\t\t\t.reduce( ( prev, next ) => prev.concat( next ), [] )\n\t\t\t\t\t// Convert into string.\n\t\t\t\t\t.reduce( arrayValueReducer, '' );\n\n\t\t\t\tif ( !isFalsy( attrValue ) ) {\n\t\t\t\t\tnode.setAttributeNS( attrNs, attrName, attrValue );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders the `style` attribute of an HTML element based on\n\t * {@link module:ui/template~Template#attributes}.\n\t *\n\t * A style attribute is an {Object} with static values:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: 'red'\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * or values bound to {@link module:ui/model~Model} properties:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: bind.to( ... )\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * Note: The `style` attribute is rendered without setting the namespace. It does not seem to be\n\t * needed.\n\t *\n\t * @private\n\t * @param {Object} styles Styles located in `attributes.style` of {@link module:ui/template~TemplateDefinition}.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderStyleAttribute( styles, data ) {\n\t\tconst node = data.node;\n\n\t\tfor ( const styleName in styles ) {\n\t\t\tconst styleValue = styles[ styleName ];\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: bind.to( 'attribute' )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( styleValue ) ) {\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: [ styleValue ],\n\t\t\t\t\tupdater: getStyleUpdater( node, styleName ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: 'red'\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse {\n\t\t\t\tnode.style[ styleName ] = styleValue;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Recursively renders HTML element's children from {@link module:ui/template~Template#children}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElementChildren( data ) {\n\t\tconst node = data.node;\n\t\tconst container = data.intoFragment ? document.createDocumentFragment() : node;\n\t\tconst isApplying = data.isApplying;\n\t\tlet childIndex = 0;\n\n\t\tfor ( const child of this.children ) {\n\t\t\tif ( isViewCollection( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tchild.setParent( node );\n\n\t\t\t\t\t// Note: ViewCollection renders its children.\n\t\t\t\t\tfor ( const view of child ) {\n\t\t\t\t\t\tcontainer.appendChild( view.element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else if ( isView( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tif ( !child.isRendered ) {\n\t\t\t\t\t\tchild.render();\n\t\t\t\t\t}\n\n\t\t\t\t\tcontainer.appendChild( child.element );\n\t\t\t\t}\n\t\t\t} else if ( isNode( child ) ) {\n\t\t\t\tcontainer.appendChild( child );\n\t\t\t} else {\n\t\t\t\tif ( isApplying ) {\n\t\t\t\t\tconst revertData = data.revertData;\n\t\t\t\t\tconst childRevertData = getEmptyRevertData();\n\n\t\t\t\t\trevertData.children.push( childRevertData );\n\n\t\t\t\t\tchild._renderNode( {\n\t\t\t\t\t\tnode: container.childNodes[ childIndex++ ],\n\t\t\t\t\t\tisApplying: true,\n\t\t\t\t\t\trevertData: childRevertData\n\t\t\t\t\t} );\n\t\t\t\t} else {\n\t\t\t\t\tcontainer.appendChild( child.render() );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif ( data.intoFragment ) {\n\t\t\tnode.appendChild( container );\n\t\t}\n\t}\n\n\t/**\n\t * Activates `on` event listeners from the {@link module:ui/template~TemplateDefinition}\n\t * on an HTML element.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_setUpListeners( data ) {\n\t\tif ( !this.eventListeners ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const key in this.eventListeners ) {\n\t\t\tconst revertBindings = this.eventListeners[ key ].map( schemaItem => {\n\t\t\t\tconst [ domEvtName, domSelector ] = key.split( '@' );\n\n\t\t\t\treturn schemaItem.activateDomEventListener( domEvtName, domSelector, data );\n\t\t\t} );\n\n\t\t\tif ( data.revertData ) {\n\t\t\t\tdata.revertData.bindings.push( revertBindings );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * For a given {@link module:ui/template~TemplateValueSchema} containing {@link module:ui/template~TemplateBinding}\n\t * activates the binding and sets its initial value.\n\t *\n\t * Note: {@link module:ui/template~TemplateValueSchema} can be for HTML element attributes or\n\t * text node `textContent`.\n\t *\n\t * @protected\n\t * @param {Object} options Binding options.\n\t * @param {module:ui/template~TemplateValueSchema} options.schema\n\t * @param {Function} options.updater A function which updates the DOM (like attribute or text).\n\t * @param {module:ui/template~RenderData} options.data Rendering data.\n\t */\n\t_bindToObservable( { schema, updater, data } ) {\n\t\tconst revertData = data.revertData;\n\n\t\t// Set initial values.\n\t\tsyncValueSchemaValue( schema, updater, data );\n\n\t\tconst revertBindings = schema\n\t\t\t// Filter \"falsy\" (false, undefined, null, '') value schema components out.\n\t\t\t.filter( item => !isFalsy( item ) )\n\t\t\t// Filter inactive bindings from schema, like static strings ('foo'), numbers (42), etc.\n\t\t\t.filter( item => item.observable )\n\t\t\t// Once only the actual binding are left, let the emitter listen to observable change:attribute event.\n\t\t\t// TODO: Reduce the number of listeners attached as many bindings may listen\n\t\t\t// to the same observable attribute.\n\t\t\t.map( templateBinding => templateBinding.activateAttributeListener( schema, updater, data ) );\n\n\t\tif ( revertData ) {\n\t\t\trevertData.bindings.push( revertBindings );\n\t\t}\n\t}\n\n\t/**\n\t * Reverts {@link module:ui/template~RenderData#revertData template data} from a node to\n\t * return it to the original state.\n\t *\n\t * @protected\n\t * @param {HTMLElement|Text} node A node to be reverted.\n\t * @param {Object} revertData An object that stores information about what changes have been made by\n\t * {@link #apply} to the node. See {@link module:ui/template~RenderData#revertData} for more information.\n\t */\n\t_revertTemplateFromNode( node, revertData ) {\n\t\tfor ( const binding of revertData.bindings ) {\n\t\t\t// Each binding may consist of several observable+observable#attribute.\n\t\t\t// like the following has 2:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'x',\n\t\t\t//\t\t\tbind.to( 'foo' ),\n\t\t\t//\t\t\t'y',\n\t\t\t//\t\t\tbind.to( 'bar' )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\tfor ( const revertBinding of binding ) {\n\t\t\t\trevertBinding();\n\t\t\t}\n\t\t}\n\n\t\tif ( revertData.text ) {\n\t\t\tnode.textContent = revertData.text;\n\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const attrName in revertData.attributes ) {\n\t\t\tconst attrValue = revertData.attributes[ attrName ];\n\n\t\t\t// When the attribute has **not** been set before #apply().\n\t\t\tif ( attrValue === null ) {\n\t\t\t\tnode.removeAttribute( attrName );\n\t\t\t} else {\n\t\t\t\tnode.setAttribute( attrName, attrValue );\n\t\t\t}\n\t\t}\n\n\t\tfor ( let i = 0; i < revertData.children.length; ++i ) {\n\t\t\tthis._revertTemplateFromNode( node.childNodes[ i ], revertData.children[ i ] );\n\t\t}\n\t}\n}\n\nmix( Template, EmitterMixin );\n\n/**\n * Describes a binding created by the {@link module:ui/template~Template.bind} interface.\n *\n * @protected\n */\nexport class TemplateBinding {\n\t/**\n\t * Creates an instance of the {@link module:ui/template~TemplateBinding} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the binding.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, def );\n\n\t\t/**\n\t\t * An observable instance of the binding. It either:\n\t\t *\n\t\t * * provides the attribute with the value,\n\t\t * * or passes the event when a corresponding DOM event is fired.\n\t\t *\n\t\t * @member {module:utils/observablemixin~ObservableMixin} module:ui/template~TemplateBinding#observable\n\t\t */\n\n\t\t/**\n\t\t * An {@link module:utils/emittermixin~Emitter} used by the binding to:\n\t\t *\n\t\t * * listen to the attribute change in the {@link module:ui/template~TemplateBinding#observable},\n\t\t * * or listen to the event in the DOM.\n\t\t *\n\t\t * @member {module:utils/emittermixin~EmitterMixin} module:ui/template~TemplateBinding#emitter\n\t\t */\n\n\t\t/**\n\t\t * The name of the {@link module:ui/template~TemplateBinding#observable observed attribute}.\n\t\t *\n\t\t * @member {String} module:ui/template~TemplateBinding#attribute\n\t\t */\n\n\t\t/**\n\t\t * A custom function to process the value of the {@link module:ui/template~TemplateBinding#attribute}.\n\t\t *\n\t\t * @member {Function} [module:ui/template~TemplateBinding#callback]\n\t\t */\n\t}\n\n\t/**\n\t * Returns the value of the binding. It is the value of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}. The value may be processed by the\n\t * {@link module:ui/template~TemplateBinding#callback}, if such has been passed to the binding.\n\t *\n\t * @param {Node} [node] A native DOM node, passed to the custom {@link module:ui/template~TemplateBinding#callback}.\n\t * @returns {*} The value of {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}.\n\t */\n\tgetValue( node ) {\n\t\tconst value = this.observable[ this.attribute ];\n\n\t\treturn this.callback ? this.callback( value, node ) : value;\n\t}\n\n\t/**\n\t * Activates the listener which waits for changes of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}, then updates the DOM with the aggregated\n\t * value of {@link module:ui/template~TemplateValueSchema}.\n\t *\n\t * @param {module:ui/template~TemplateValueSchema} schema A full schema to generate an attribute or text in the DOM.\n\t * @param {Function} updater A DOM updater function used to update the native DOM attribute or text.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateAttributeListener( schema, updater, data ) {\n\t\tconst callback = () => syncValueSchemaValue( schema, updater, data );\n\n\t\tthis.emitter.listenTo( this.observable, 'change:' + this.attribute, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( this.observable, 'change:' + this.attribute, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes either:\n *\n * * a binding to an {@link module:utils/observablemixin~Observable},\n * * or a native DOM event binding.\n *\n * It is created by the {@link module:ui/template~BindChain#to} method.\n *\n * @protected\n */\nexport class TemplateToBinding extends TemplateBinding {\n\t/**\n\t * Activates the listener for the native DOM event, which when fired, is propagated by\n\t * the {@link module:ui/template~TemplateBinding#emitter}.\n\t *\n\t * @param {String} domEvtName The name of the native DOM event.\n\t * @param {String} domSelector The selector in the DOM to filter delegated events.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateDomEventListener( domEvtName, domSelector, data ) {\n\t\tconst callback = ( evt, domEvt ) => {\n\t\t\tif ( !domSelector || domEvt.target.matches( domSelector ) ) {\n\t\t\t\tif ( typeof this.eventNameOrFunction == 'function' ) {\n\t\t\t\t\tthis.eventNameOrFunction( domEvt );\n\t\t\t\t} else {\n\t\t\t\t\tthis.observable.fire( this.eventNameOrFunction, domEvt );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\tthis.emitter.listenTo( data.node, domEvtName, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( data.node, domEvtName, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes a binding to {@link module:utils/observablemixin~ObservableMixin} created by the {@link module:ui/template~BindChain#if}\n * method.\n *\n * @protected\n */\nexport class TemplateIfBinding extends TemplateBinding {\n\t/**\n\t * @inheritDoc\n\t */\n\tgetValue( node ) {\n\t\tconst value = super.getValue( node );\n\n\t\treturn isFalsy( value ) ? false : ( this.valueIfTrue || true );\n\t}\n\n\t/**\n\t * The value of the DOM attribute or text to be set if the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable} is `true`.\n\t *\n\t * @member {String} [module:ui/template~TemplateIfBinding#valueIfTrue]\n\t */\n}\n\n// Checks whether given {@link module:ui/template~TemplateValueSchema} contains a\n// {@link module:ui/template~TemplateBinding}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @returns {Boolean}\nfunction hasTemplateBinding( schema ) {\n\tif ( !schema ) {\n\t\treturn false;\n\t}\n\n\t// Normalize attributes with additional data like namespace:\n\t//\n\t//\t\tclass: {\n\t//\t\t\tns: 'abc',\n\t//\t\t\tvalue: [ ... ]\n\t//\t\t}\n\t//\n\tif ( schema.value ) {\n\t\tschema = schema.value;\n\t}\n\n\tif ( Array.isArray( schema ) ) {\n\t\treturn schema.some( hasTemplateBinding );\n\t} else if ( schema instanceof TemplateBinding ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Assembles the value using {@link module:ui/template~TemplateValueSchema} and stores it in a form of\n// an Array. Each entry of the Array corresponds to one of {@link module:ui/template~TemplateValueSchema}\n// items.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\n// @returns {Array}\nfunction getValueSchemaValue( schema, node ) {\n\treturn schema.map( schemaItem => {\n\t\t// Process {@link module:ui/template~TemplateBinding} bindings.\n\t\tif ( schemaItem instanceof TemplateBinding ) {\n\t\t\treturn schemaItem.getValue( node );\n\t\t}\n\n\t\t// All static values like strings, numbers, and \"falsy\" values (false, null, undefined, '', etc.) just pass.\n\t\treturn schemaItem;\n\t} );\n}\n\n// A function executed each time the bound Observable attribute changes, which updates the DOM with a value\n// constructed from {@link module:ui/template~TemplateValueSchema}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Function} updater A function which updates the DOM (like attribute or text).\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\nfunction syncValueSchemaValue( schema, updater, { node } ) {\n\tlet value = getValueSchemaValue( schema, node );\n\n\t// Check if schema is a single Template.bind.if, like:\n\t//\n\t//\t\tclass: Template.bind.if( 'foo' )\n\t//\n\tif ( schema.length == 1 && schema[ 0 ] instanceof TemplateIfBinding ) {\n\t\tvalue = value[ 0 ];\n\t} else {\n\t\tvalue = value.reduce( arrayValueReducer, '' );\n\t}\n\n\tif ( isFalsy( value ) ) {\n\t\tupdater.remove();\n\t} else {\n\t\tupdater.set( value );\n\t}\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset `textContent`.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @returns {Object}\nfunction getTextUpdater( node ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tnode.textContent = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tnode.textContent = '';\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset an attribute.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} attrName Name of the attribute to be modified.\n// @param {String} [ns=null] Namespace to use.\n// @returns {Object}\nfunction getAttributeUpdater( el, attrName, ns ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.setAttributeNS( ns, attrName, value );\n\t\t},\n\n\t\tremove() {\n\t\t\tel.removeAttributeNS( ns, attrName );\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of CSSStyleDeclaration to set or remove a style.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} styleName Name of the style to be modified.\n// @returns {Object}\nfunction getStyleUpdater( el, styleName ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.style[ styleName ] = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tel.style[ styleName ] = null;\n\t\t}\n\t};\n}\n\n// Clones definition of the template.\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition}\nfunction clone( def ) {\n\tconst clone = cloneDeepWith( def, value => {\n\t\t// Don't clone the `Template.bind`* bindings because of the references to Observable\n\t\t// and DomEmitterMixin instances inside, which would also be traversed and cloned by greedy\n\t\t// cloneDeepWith algorithm. There's no point in cloning Observable/DomEmitterMixins\n\t\t// along with the definition.\n\t\t//\n\t\t// Don't clone Template instances if provided as a child. They're simply #render()ed\n\t\t// and nothing should interfere.\n\t\t//\n\t\t// Also don't clone View instances if provided as a child of the Template. The template\n\t\t// instance will be extracted from the View during the normalization and there's no need\n\t\t// to clone it.\n\t\tif ( value && ( value instanceof TemplateBinding || isTemplate( value ) || isView( value ) || isViewCollection( value ) ) ) {\n\t\t\treturn value;\n\t\t}\n\t} );\n\n\treturn clone;\n}\n\n// Normalizes given {@link module:ui/template~TemplateDefinition}.\n//\n// See:\n// * {@link normalizeAttributes}\n// * {@link normalizeListeners}\n// * {@link normalizePlainTextDefinition}\n// * {@link normalizeTextDefinition}\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition} Normalized definition.\nfunction normalize( def ) {\n\tif ( typeof def == 'string' ) {\n\t\tdef = normalizePlainTextDefinition( def );\n\t} else if ( def.text ) {\n\t\tnormalizeTextDefinition( def );\n\t}\n\n\tif ( def.on ) {\n\t\tdef.eventListeners = normalizeListeners( def.on );\n\n\t\t// Template mixes EmitterMixin, so delete #on to avoid collision.\n\t\tdelete def.on;\n\t}\n\n\tif ( !def.text ) {\n\t\tif ( def.attributes ) {\n\t\t\tnormalizeAttributes( def.attributes );\n\t\t}\n\n\t\tconst children = [];\n\n\t\tif ( def.children ) {\n\t\t\tif ( isViewCollection( def.children ) ) {\n\t\t\t\tchildren.push( def.children );\n\t\t\t} else {\n\t\t\t\tfor ( const child of def.children ) {\n\t\t\t\t\tif ( isTemplate( child ) || isView( child ) || isNode( child ) ) {\n\t\t\t\t\t\tchildren.push( child );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tchildren.push( new Template( child ) );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tdef.children = children;\n\t}\n\n\treturn def;\n}\n\n// Normalizes \"attributes\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tattributes: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: {\n//\t\t\t\tvalue: 'bar'\n//\t\t\t}\n//\t\t}\n//\n// becomes\n//\n//\t\tattributes: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: {\n//\t\t\t\tvalue: [ 'bar' ]\n//\t\t\t}\n//\t\t}\n//\n// @param {Object} attributes\nfunction normalizeAttributes( attributes ) {\n\tfor ( const a in attributes ) {\n\t\tif ( attributes[ a ].value ) {\n\t\t\tattributes[ a ].value = [].concat( attributes[ a ].value );\n\t\t}\n\n\t\tarrayify( attributes, a );\n\t}\n}\n\n// Normalizes \"on\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\ton: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// becomes\n//\n//\t\ton: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// @param {Object} listeners\n// @returns {Object} Object containing normalized listeners.\nfunction normalizeListeners( listeners ) {\n\tfor ( const l in listeners ) {\n\t\tarrayify( listeners, l );\n\t}\n\n\treturn listeners;\n}\n\n// Normalizes \"string\" {@link module:ui/template~TemplateDefinition}.\n//\n//\t\t\"foo\"\n//\n// becomes\n//\n//\t\t{ text: [ 'foo' ] },\n//\n// @param {String} def\n// @returns {module:ui/template~TemplateDefinition} Normalized template definition.\nfunction normalizePlainTextDefinition( def ) {\n\treturn {\n\t\ttext: [ def ]\n\t};\n}\n\n// Normalizes text {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tchildren: [\n//\t\t\t{ text: 'def' },\n//\t\t\t{ text: {@link module:ui/template~TemplateBinding} }\n//\t\t]\n//\n// becomes\n//\n//\t\tchildren: [\n//\t\t\t{ text: [ 'def' ] },\n//\t\t\t{ text: [ {@link module:ui/template~TemplateBinding} ] }\n//\t\t]\n//\n// @param {module:ui/template~TemplateDefinition} def\nfunction normalizeTextDefinition( def ) {\n\tif ( !Array.isArray( def.text ) ) {\n\t\tdef.text = [ def.text ];\n\t}\n}\n\n// Wraps an entry in Object in an Array, if not already one.\n//\n//\t\t{\n//\t\t\tx: 'y',\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// becomes\n//\n//\t\t{\n//\t\t\tx: [ 'y' ],\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// @param {Object} obj\n// @param {String} key\nfunction arrayify( obj, key ) {\n\tif ( !Array.isArray( obj[ key ] ) ) {\n\t\tobj[ key ] = [ obj[ key ] ];\n\t}\n}\n\n// A helper which concatenates the value avoiding unwanted\n// leading white spaces.\n//\n// @param {String} prev\n// @param {String} cur\n// @returns {String}\nfunction arrayValueReducer( prev, cur ) {\n\tif ( isFalsy( cur ) ) {\n\t\treturn prev;\n\t} else if ( isFalsy( prev ) ) {\n\t\treturn cur;\n\t} else {\n\t\treturn `${ prev } ${ cur }`;\n\t}\n}\n\n// Extends one object defined in the following format:\n//\n//\t\t{\n//\t\t\tkey1: [Array1],\n//\t\t\tkey2: [Array2],\n//\t\t\t...\n//\t\t\tkeyN: [ArrayN]\n//\t\t}\n//\n// with another object of the same data format.\n//\n// @param {Object} obj Base object.\n// @param {Object} ext Object extending base.\n// @returns {String}\nfunction extendObjectValueArray( obj, ext ) {\n\tfor ( const a in ext ) {\n\t\tif ( obj[ a ] ) {\n\t\t\tobj[ a ].push( ...ext[ a ] );\n\t\t} else {\n\t\t\tobj[ a ] = ext[ a ];\n\t\t}\n\t}\n}\n\n// A helper for {@link module:ui/template~Template#extend}. Recursively extends {@link module:ui/template~Template} instance\n// with content from {@link module:ui/template~TemplateDefinition}. See {@link module:ui/template~Template#extend} to learn more.\n//\n// @param {module:ui/template~Template} def A template instance to be extended.\n// @param {module:ui/template~TemplateDefinition} def A definition which is to extend the template instance.\n// @param {Object} Error context.\nfunction extendTemplate( template, def ) {\n\tif ( def.attributes ) {\n\t\tif ( !template.attributes ) {\n\t\t\ttemplate.attributes = {};\n\t\t}\n\n\t\textendObjectValueArray( template.attributes, def.attributes );\n\t}\n\n\tif ( def.eventListeners ) {\n\t\tif ( !template.eventListeners ) {\n\t\t\ttemplate.eventListeners = {};\n\t\t}\n\n\t\textendObjectValueArray( template.eventListeners, def.eventListeners );\n\t}\n\n\tif ( def.text ) {\n\t\ttemplate.text.push( ...def.text );\n\t}\n\n\tif ( def.children && def.children.length ) {\n\t\tif ( template.children.length != def.children.length ) {\n\t\t\t/**\n\t\t\t * The number of children in extended definition does not match.\n\t\t\t *\n\t\t\t * @error ui-template-extend-children-mismatch\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-extend-children-mismatch: The number of children in extended definition does not match.',\n\t\t\t\ttemplate\n\t\t\t);\n\t\t}\n\n\t\tlet childIndex = 0;\n\n\t\tfor ( const childDef of def.children ) {\n\t\t\textendTemplate( template.children[ childIndex++ ], childDef );\n\t\t}\n\t}\n}\n\n// Checks if value is \"falsy\".\n// Note: 0 (Number) is not \"falsy\" in this context.\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isFalsy( value ) {\n\treturn !value && value !== 0;\n}\n\n// Checks if the item is an instance of {@link module:ui/view~View}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isView( item ) {\n\treturn item instanceof View;\n}\n\n// Checks if the item is an instance of {@link module:ui/template~Template}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isTemplate( item ) {\n\treturn item instanceof Template;\n}\n\n// Checks if the item is an instance of {@link module:ui/viewcollection~ViewCollection}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isViewCollection( item ) {\n\treturn item instanceof ViewCollection;\n}\n\n// Creates an empty skeleton for {@link module:ui/template~Template#revert}\n// data.\n//\n// @private\nfunction getEmptyRevertData() {\n\treturn {\n\t\tchildren: [],\n\t\tbindings: [],\n\t\tattributes: {}\n\t};\n}\n\n// Checks whether an attribute should be extended when\n// {@link module:ui/template~Template#apply} is called.\n//\n// @private\n// @param {String} attrName Attribute name to check.\nfunction shouldExtend( attrName ) {\n\treturn attrName == 'class' || attrName == 'style';\n}\n\n/**\n * A definition of the {@link module:ui/template~Template}. It describes what kind of\n * node a template will render (HTML element or text), attributes of an element, DOM event\n * listeners and children.\n *\n * Also see:\n * * {@link module:ui/template~TemplateValueSchema} to learn about HTML element attributes,\n * * {@link module:ui/template~TemplateListenerSchema} to learn about DOM event listeners.\n *\n * A sample definition on an HTML element can look like this:\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\ttag: 'span',\n *\t\t\t\t\tattributes: { ... },\n *\t\t\t\t\tchildren: [ ... ],\n *\t\t\t\t},\n *\t\t\t\t{\n *\t\t\t\t\ttext: 'static–text'\n *\t\t\t\t},\n *\t\t\t\t'also-static–text',\n *\t\t\t],\n *\t\t\tattributes: {\n *\t\t\t\tclass: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tid: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tstyle: {@link module:ui/template~TemplateValueSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\t'click': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// Document.querySelector format is also accepted.\n *\t\t\t\t'keyup@a.some-class': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t}\n *\t\t} );\n *\n * A {@link module:ui/view~View}, another {@link module:ui/template~Template} or a native DOM node\n * can also become a child of a template. When a view is passed, its {@link module:ui/view~View#element} is used:\n *\n *\t\tconst view = new SomeView();\n *\t\tconst childTemplate = new Template( { ... } );\n *\t\tconst childNode = document.createElement( 'b' );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: [\n *\t\t\t\t// view#element will be added as a child of this <p>.\n *\t\t\t\tview,\n *\n * \t\t\t\t// The output of childTemplate.render() will be added here.\n *\t\t\t\tchildTemplate,\n *\n *\t\t\t\t// Native DOM nodes are included directly in the rendered output.\n *\t\t\t\tchildNode\n *\t\t\t]\n *\t\t} );\n *\n * An entire {@link module:ui/viewcollection~ViewCollection} can be used as a child in the definition:\n *\n *\t\tconst collection = new ViewCollection();\n *\t\tcollection.add( someView );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: collection\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateDefinition\n * @type Object\n *\n * @property {String} tag See the template {@link module:ui/template~Template#tag} property.\n *\n * @property {Array.<module:ui/template~TemplateDefinition>} [children]\n * See the template {@link module:ui/template~Template#children} property.\n *\n * @property {Object.<String, module:ui/template~TemplateValueSchema>} [attributes]\n * See the template {@link module:ui/template~Template#attributes} property.\n *\n * @property {String|module:ui/template~TemplateValueSchema|Array.<String|module:ui/template~TemplateValueSchema>} [text]\n * See the template {@link module:ui/template~Template#text} property.\n *\n * @property {Object.<String, module:ui/template~TemplateListenerSchema>} [on]\n * See the template {@link module:ui/template~Template#eventListeners} property.\n */\n\n/**\n * Describes a value of an HTML element attribute or `textContent`. It allows combining multiple\n * data sources like static values and {@link module:utils/observablemixin~Observable} attributes.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn where to use it,\n * * {@link module:ui/template~Template.bind} to learn how to configure\n * {@link module:utils/observablemixin~Observable} attribute bindings,\n * * {@link module:ui/template~Template#render} to learn how to render a template,\n * * {@link module:ui/template~BindChain#to `to()`} and {@link module:ui/template~BindChain#if `if()`}\n * methods to learn more about bindings.\n *\n * Attribute values can be described in many different ways:\n *\n *\t\t// Bind helper will create bindings to attributes of the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// A plain string schema.\n *\t\t\t\t'class': 'static-text',\n *\n *\t\t\t\t// An object schema, binds to the \"foo\" attribute of the\n *\t\t\t\t// observable and follows its value.\n *\t\t\t\t'class': bind.to( 'foo' ),\n *\n *\t\t\t\t// An array schema, combines the above.\n *\t\t\t\t'class': [\n *\t\t\t\t\t'static-text',\n *\t\t\t\t\tbind.to( 'bar', () => { ... } ),\n *\n * \t\t\t\t\t// Bindings can also be conditional.\n *\t\t\t\t\tbind.if( 'baz', 'class-when-baz-is-true' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema, with a custom namespace, e.g. useful for creating SVGs.\n *\t\t\t\t'class': {\n *\t\t\t\t\tns: 'http://ns.url',\n *\t\t\t\t\tvalue: [\n *\t\t\t\t\t\tbind.if( 'baz', 'value-when-true' ),\n *\t\t\t\t\t\t'static-text'\n *\t\t\t\t\t]\n *\t\t\t\t},\n *\n *\t\t\t\t// An object schema, specific for styles.\n *\t\t\t\tstyle: {\n *\t\t\t\t\tcolor: 'red',\n *\t\t\t\t\tbackgroundColor: bind.to( 'qux', () => { ... } )\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * Text nodes can also have complex values:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\t// Will render a \"foo\" text node.\n *\t\tnew Template( {\n *\t\t\ttext: 'foo'\n *\t\t} );\n *\n *\t\t// Will render a \"static text: {observable.foo}\" text node.\n *\t\t// The text of the node will be updated as the \"foo\" attribute changes.\n *\t\tnew Template( {\n *\t\t\ttext: [\n *\t\t\t\t'static text: ',\n *\t\t\t\tbind.to( 'foo', () => { ... } )\n *\t\t\t]\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateValueSchema\n * @type {Object|String|Array}\n */\n\n/**\n * Describes an event listener attached to an HTML element. Such listener can propagate DOM events\n * through an {@link module:utils/observablemixin~Observable} instance, execute custom callbacks\n * or both, if necessary.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn more about template definitions,\n * * {@link module:ui/template~BindChain#to `to()`} method to learn more about bindings.\n *\n * Check out different ways of attaching event listeners below:\n *\n *\t\t// Bind helper will propagate events through the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\ton: {\n *\t\t\t\t// An object schema. The observable will fire the \"clicked\" event upon DOM \"click\".\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\n *\t\t\t\t// An object schema. It will work for \"click\" event on \"a.foo\" children only.\n *\t\t\t\t'click@a.foo': bind.to( 'clicked' )\n *\n *\t\t\t\t// An array schema, makes the observable propagate multiple events.\n *\t\t\t\tclick: [\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( 'executed' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema with a custom callback.\n *\t\t\t\t'click@a.foo': {\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( evt => {\n *\t\t\t\t\t\tconsole.log( `${ evt.target } has been clicked!` );\n *\t\t\t\t\t} }\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateListenerSchema\n * @type {Object|String|Array}\n */\n\n/**\n * The return value of {@link ~Template.bind `Template.bind()`}. It provides `to()` and `if()`\n * methods to create the {@link module:utils/observablemixin~Observable observable} attribute and event bindings.\n *\n * @interface module:ui/template~BindChain\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to either:\n *\n * * an HTML element attribute or a text node `textContent`, so it remains in sync with the observable\n * attribute as it changes,\n * * or an HTML element DOM event, so the DOM events are propagated through an observable.\n *\n * Some common use cases of `to()` bindings are presented below:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// class=\"...\" attribute gets bound to `observable#a`\n *\t\t\t\tclass: bind.to( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t// <p>...</p> gets bound to observable#b; always `toUpperCase()`.\n *\t\t\t\t{\n *\t\t\t\t\ttext: bind.to( 'b', ( value, node ) => value.toUpperCase() )\n *\t\t\t\t}\n *\t\t\t],\n *\t\t\ton: {\n *\t\t\t\tclick: [\n *\t\t\t\t\t// An observable will fire \"clicked\" upon \"click\" in the DOM.\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\n *\t\t\t\t\t// A custom callback will be executed upon \"click\" in the DOM.\n *\t\t\t\t\tbind.to( () => {\n *\t\t\t\t\t\t...\n *\t\t\t\t\t} )\n *\t\t\t\t]\n *\t\t\t}\n *\t\t} ).render();\n *\n * Learn more about using `to()` in the {@link module:ui/template~TemplateValueSchema} and\n * {@link module:ui/template~TemplateListenerSchema}.\n *\n * @method #to\n * @param {String|Function} eventNameOrFunctionOrAttribute An attribute name of\n * {@link module:utils/observablemixin~Observable} or a DOM event name or an event callback.\n * @param {Function} [callback] Allows for processing of the value. Accepts `Node` and `value` as arguments.\n * @returns {module:ui/template~TemplateBinding}\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to an HTML element attribute or a text\n * node `textContent` so it remains in sync with the observable attribute as it changes.\n *\n * Unlike {@link module:ui/template~BindChain#to}, it controls the presence of the attribute or `textContent`\n * depending on the \"falseness\" of an {@link module:utils/observablemixin~Observable} attribute.\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'input',\n *\t\t\tattributes: {\n *\t\t\t\t// <input checked> when `observable#a` is not undefined/null/false/''\n *\t\t\t\t// <input> when `observable#a` is undefined/null/false\n *\t\t\t\tchecked: bind.if( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\t// <input>\"b-is-not-set\"</input> when `observable#b` is undefined/null/false/''\n *\t\t\t\t\t// <input></input> when `observable#b` is not \"falsy\"\n *\t\t\t\t\ttext: bind.if( 'b', 'b-is-not-set', ( value, node ) => !value )\n *\t\t\t\t}\n *\t\t\t]\n *\t\t} ).render();\n *\n * Learn more about using `if()` in the {@link module:ui/template~TemplateValueSchema}.\n *\n * @method #if\n * @param {String} attribute An attribute name of {@link module:utils/observablemixin~Observable} used in the binding.\n * @param {String} [valueIfTrue] Value set when the {@link module:utils/observablemixin~Observable} attribute is not\n * undefined/null/false/'' (empty string).\n * @param {Function} [callback] Allows for processing of the value. Accepts `Node` and `value` as arguments.\n * @returns {module:ui/template~TemplateBinding}\n */\n\n/**\n * The {@link module:ui/template~Template#_renderNode} configuration.\n *\n * @private\n * @interface module:ui/template~RenderData\n */\n\n/**\n * Tells {@link module:ui/template~Template#_renderNode} to render\n * children into `DocumentFragment` first and then append the fragment\n * to the parent element. It is a speed optimization.\n *\n * @member {Boolean} #intoFragment\n */\n\n/**\n * A node which is being rendered.\n *\n * @member {HTMLElement|Text} #node\n */\n\n/**\n * Indicates whether the {@module:ui/template~RenderNodeOptions#node} has\n * been provided by {@module:ui/template~Template#apply}.\n *\n * @member {Boolean} #isApplying\n */\n\n/**\n * An object storing the data that helps {@module:ui/template~Template#revert}\n * bringing back an element to its initial state, i.e. before\n * {@module:ui/template~Template#apply} was called.\n *\n * @member {Object} #revertData\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/view\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ViewCollection from './viewcollection';\nimport Template from './template';\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\nimport '../theme/globals/globals.css';\n\n/**\n * The basic view class, which represents an HTML element created out of a\n * {@link module:ui/view~View#template}. Views are building blocks of the user interface and handle\n * interaction\n *\n * Views {@link module:ui/view~View#registerChild aggregate} children in\n * {@link module:ui/view~View#createCollection collections} and manage the life cycle of DOM\n * listeners e.g. by handling rendering and destruction.\n *\n * See the {@link module:ui/template~TemplateDefinition} syntax to learn more about shaping view\n * elements, attributes and listeners.\n *\n *\t\tclass SampleView extends View {\n *\t\t\tconstructor( locale ) {\n *\t\t\t\tsuper( locale );\n *\n *\t\t\t\tconst bind = this.bindTemplate;\n *\n *\t\t\t\t// Views define their interface (state) using observable attributes.\n *\t\t\t\tthis.set( 'elementClass', 'bar' );\n *\n *\t\t\t\tthis.setTemplate( {\n *\t\t\t\t\ttag: 'p',\n *\n *\t\t\t\t\t// The element of the view can be defined with its children.\n *\t\t\t\t\tchildren: [\n *\t\t\t\t\t\t'Hello',\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\ttag: 'b',\n *\t\t\t\t\t\t\tchildren: [ 'world!' ]\n *\t\t\t\t\t\t}\n *\t\t\t\t\t],\n *\t\t\t\t\tattributes: {\n *\t\t\t\t\t\tclass: [\n *\t\t\t\t\t\t\t'foo',\n *\n *\t\t\t\t\t\t\t// Observable attributes control the state of the view in DOM.\n *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n *\t\t\t\t\t\t]\n *\t\t\t\t\t},\n *\t\t\t\t\ton: {\n *\t\t\t\t\t\t// Views listen to DOM events and propagate them.\n *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t\t\t}\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n *\t\tconst view = new SampleView( locale );\n *\n *\t\tview.render();\n *\n *\t\t// Append <p class=\"foo bar\">Hello<b>world</b></p> to the <body>\n *\t\tdocument.body.appendChild( view.element );\n *\n *\t\t// Change the class attribute to <p class=\"foo baz\">Hello<b>world</b></p>\n *\t\tview.elementClass = 'baz';\n *\n *\t\t// Respond to the \"click\" event in DOM by executing a custom action.\n *\t\tview.on( 'clicked', () => {\n *\t\t\tconsole.log( 'The view has been clicked!' );\n *\t\t} );\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class View {\n\t/**\n\t * Creates an instance of the {@link module:ui/view~View} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n\tconstructor( locale ) {\n\t\t/**\n\t\t * An HTML element of the view. `null` until {@link #render rendered}\n\t\t * from the {@link #template}.\n\t\t *\n\t\t *\t\tclass SampleView extends View {\n\t\t *\t\t\tconstructor() {\n\t\t *\t\t\t\tsuper();\n\t\t *\n\t\t *\t\t\t\t// A template instance the #element will be created from.\n\t\t *\t\t\t\tthis.setTemplate( {\n\t\t *\t\t\t\t\ttag: 'p'\n\t\t *\n\t\t *\t\t\t\t\t// ...\n\t\t *\t\t\t\t} );\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t *\t\tconst view = new SampleView();\n\t\t *\n\t\t *\t\t// Renders the #template.\n\t\t *\t\tview.render();\n\t\t *\n\t\t *\t\t// Append the HTML element of the view to <body>.\n\t\t *\t\tdocument.body.appendChild( view.element );\n\t\t *\n\t\t * **Note**: The element of the view can also be assigned directly:\n\t\t *\n\t\t *\t\tview.element = document.querySelector( '#my-container' );\n\t\t *\n\t\t * @member {HTMLElement}\n\t\t */\n\t\tthis.element = null;\n\n\t\t/**\n\t\t * Set `true` when the view has already been {@link module:ui/view~View#render rendered}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isRendered\n\t\t */\n\t\tthis.isRendered = false;\n\n\t\t/**\n\t\t * A set of tools to localize the user interface.\n\t\t *\n\t\t * Also see {@link module:core/editor/editor~Editor#locale}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * Note: If {@link #locale} instance hasn't been passed to the view this method may not\n\t\t * be available.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method\n\t\t */\n\t\tthis.t = locale && locale.t;\n\n\t\t/**\n\t\t * Collections registered with {@link #createCollection}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set.<module:ui/viewcollection~ViewCollection>}\n\t\t */\n\t\tthis._viewCollections = new Collection();\n\n\t\t/**\n\t\t * A collection of view instances, which have been added directly\n\t\t * into the {@link module:ui/template~Template#children}.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis._unboundChildren = this.createCollection();\n\n\t\t// Pass parent locale to its children.\n\t\tthis._viewCollections.on( 'add', ( evt, collection ) => {\n\t\t\tcollection.locale = locale;\n\t\t} );\n\n\t\t/**\n\t\t * Template of this view. It provides the {@link #element} representing\n\t\t * the view in DOM, which is {@link #render rendered}.\n\t\t *\n\t\t * @member {module:ui/template~Template} #template\n\t\t */\n\n\t\t/**\n\t\t * Cached {@link module:ui/template~BindChain bind chain} object created by the\n\t\t * {@link #template}. See {@link #bindTemplate}.\n\t\t *\n\t\t * @private\n\t\t * @member {Object} #_bindTemplate\n\t\t */\n\n\t\tthis.decorate( 'render' );\n\t}\n\n\t/**\n\t * Shorthand for {@link module:ui/template~Template.bind}, a binding\n\t * {@link module:ui/template~BindChain interface} pre–configured for the view instance.\n\t *\n\t * It provides {@link module:ui/template~BindChain#to `to()`} and\n\t * {@link module:ui/template~BindChain#if `if()`} methods that initialize bindings with\n\t * observable attributes and attach DOM listeners.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tconst bind = this.bindTemplate;\n\t *\n\t *\t\t\t\t// These {@link module:utils/observablemixin~Observable observable} attributes will control\n\t *\t\t\t\t// the state of the view in DOM.\n\t *\t\t\t\tthis.set( {\n\t *\t\t\t\t\telementClass: 'foo',\n\t *\t\t\t\t \tisEnabled: true\n\t *\t\t\t\t } );\n\t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\t// The class HTML attribute will follow elementClass\n\t *\t\t\t\t\t\t// and isEnabled view attributes.\n\t *\t\t\t\t\t\tclass: [\n\t *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n\t *\t\t\t\t\t\t\tbind.if( 'isEnabled', 'present-when-enabled' )\n\t *\t\t\t\t\t\t]\n\t *\t\t\t\t\t},\n\t *\n\t *\t\t\t\t\ton: {\n\t *\t\t\t\t\t\t// The view will fire the \"clicked\" event upon clicking <p> in DOM.\n\t *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n\t *\t\t\t\t\t}\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * @method #bindTemplate\n\t */\n\tget bindTemplate() {\n\t\tif ( this._bindTemplate ) {\n\t\t\treturn this._bindTemplate;\n\t\t}\n\n\t\treturn ( this._bindTemplate = Template.bind( this, this ) );\n\t}\n\n\t/**\n\t * Creates a new collection of views, which can be used as\n\t * {@link module:ui/template~Template#children} of this view.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.items = this.createCollection();\n \t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\t// `items` collection will render here.\n\t *\t\t\t\t\tchildren: this.items\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\t\tconst child = new ChildView( locale );\n\t *\n\t *\t\tview.render();\n\t *\n\t *\t\t// It will append <p></p> to the <body>.\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t *\t\t// From now on the child is nested under its parent, which is also reflected in DOM.\n\t *\t\t// <p><child#element></p>\n\t *\t\tview.items.add( child );\n\t *\n\t * @returns {module:ui/viewcollection~ViewCollection} A new collection of view instances.\n\t */\n\tcreateCollection() {\n\t\tconst collection = new ViewCollection();\n\n\t\tthis._viewCollections.add( collection );\n\n\t\treturn collection;\n\t}\n\n\t/**\n\t * Registers a new child view under the view instance. Once registered, a child\n\t * view is managed by its parent, including {@link #render rendering}\n\t * and {@link #destroy destruction}.\n\t *\n\t * To revert this, use {@link #deregisterChild}.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.setTemplate( { tag: 'p' } );\n\t *\n\t *\t\t\t\t// Register the children.\n\t *\t\t\t\tthis.registerChild( [ this.childA, this.childB ] );\n\t *\t\t\t}\n\t *\n\t *\t\t\trender() {\n\t *\t\t\t\tsuper.render();\n\t *\n\t *\t\t\t\tthis.element.appendChild( this.childA.element );\n\t *\t\t\t\tthis.element.appendChild( this.childB.element );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\n\t *\t\tview.render();\n\t *\n\t *\t\t// Will append <p><childA#element><b></b><childB#element></p>.\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t * **Note**: There's no need to add child views if they're already referenced in the\n\t * {@link #template}:\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n \t *\t\t\t\t\t// These children will be added automatically. There's no\n \t *\t\t\t\t\t// need to call {@link #registerChild} for any of them.\n\t *\t\t\t\t\tchildren: [ this.childA, this.childB ]\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\n\t *\t\t\t// ...\n\t *\t\t}\n\t *\n\t * @param {module:ui/view~View|Iterable.<module:ui/view~View>} children Children views to be registered.\n\t */\n\tregisterChild( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tfor ( const child of children ) {\n\t\t\tthis._unboundChildren.add( child );\n\t\t}\n\t}\n\n\t/**\n\t * The opposite of {@link #registerChild}. Removes a child view from this view instance.\n\t * Once removed, the child is no longer managed by its parent, e.g. it can safely\n\t * become a child of another parent view.\n\t *\n\t * @see #registerChild\n\t * @param {module:ui/view~View|Iterable.<module:ui/view~View>} children Child views to be removed.\n\t */\n\tderegisterChild( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tfor ( const child of children ) {\n\t\t\tthis._unboundChildren.remove( child );\n\t\t}\n\t}\n\n\t/**\n\t * Sets the {@link #template} of the view with with given definition.\n\t *\n\t * A shorthand for:\n\t *\n\t *\t\tview.setTemplate( definition );\n\t *\n\t * @param {module:ui/template~TemplateDefinition} definition Definition of view's template.\n\t */\n\tsetTemplate( definition ) {\n\t\tthis.template = new Template( definition );\n\t}\n\n\t/**\n\t * {@link module:ui/template~Template.extend Extends} the {@link #template} of the view with\n\t * with given definition.\n\t *\n\t * A shorthand for:\n\t *\n\t *\t\tTemplate.extend( view.template, definition );\n\t *\n\t * **Note**: Is requires the {@link #template} to be already set. See {@link #setTemplate}.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} definition Definition which\n\t * extends the {@link #template}.\n\t */\n\textendTemplate( definition ) {\n\t\tTemplate.extend( this.template, definition );\n\t}\n\n\t/**\n\t * Recursively renders the view.\n\t *\n\t * Once the view is rendered:\n\t * * the {@link #element} becomes an HTML element out of {@link #template},\n\t * * the {@link #isRendered} flag is set `true`.\n\t *\n\t * **Note**: The children of the view:\n\t * * defined directly in the {@link #template}\n\t * * residing in collections created by the {@link #createCollection} method,\n\t * * and added by {@link #registerChild}\n\t * are also rendered in the process.\n\t *\n\t * In general, `render()` method is the right place to keep the code which refers to the\n\t * {@link #element} and should be executed at the very beginning of the view's life cycle.\n\t *\n\t * It is possible to {@link module:ui/template~Template.extend} the {@link #template} before\n\t * the view is rendered. To allow an early customization of the view (e.g. by its parent),\n\t * such references should be done in `render()`.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor() {\n\t *\t\t\t\tthis.setTemplate( {\n\t *\t\t\t\t\t// ...\n\t *\t\t\t\t} );\n\t *\t\t\t},\n\t *\n\t *\t\t\trender() {\n\t *\t\t\t\t// View#element becomes available.\n\t *\t\t\t\tsuper.render();\n\t *\n\t *\t\t\t\t// The \"scroll\" listener depends on #element.\n\t *\t\t\t\tthis.listenTo( window, 'scroll', () => {\n\t *\t\t\t\t\t// A reference to #element would render the #template and make it non-extendable.\n\t *\t\t\t\t\tif ( window.scrollY > 0 ) {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 100;\n\t *\t\t\t\t\t} else {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 0;\n\t *\t\t\t\t\t}\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView();\n\t *\n\t *\t\t// Let's customize the view before it gets rendered.\n\t *\t\tview.extendTemplate( {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: [\n\t *\t\t\t\t\t'additional-class'\n\t *\t\t\t\t]\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Late rendering allows customization of the view.\n\t *\t\tview.render();\n\t */\n\trender() {\n\t\tif ( this.isRendered ) {\n\t\t\t/**\n\t\t\t * This View has already been rendered.\n\t\t\t *\n\t\t\t * @error ui-view-render-rendered\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-view-render-already-rendered: This View has already been rendered.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\t// Render #element of the view.\n\t\tif ( this.template ) {\n\t\t\tthis.element = this.template.render();\n\n\t\t\t// Auto–register view children from #template.\n\t\t\tthis.registerChild( this.template.getViews() );\n\t\t}\n\n\t\tthis.isRendered = true;\n\t}\n\n\t/**\n\t * Recursively destroys the view instance and child views added by {@link #registerChild} and\n\t * residing in collections created by the {@link #createCollection}.\n\t *\n\t * Destruction disables all event listeners:\n\t * * created on the view, e.g. `view.on( 'event', () => {} )`,\n\t * * defined in the {@link #template} for DOM events.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\n\t\tthis._viewCollections.map( c => c.destroy() );\n\n\t\t// Template isn't obligatory for views.\n\t\tif ( this.template && this.template._revertData ) {\n\t\t\tthis.template.revert( this.element );\n\t\t}\n\t}\n\n\t/**\n\t * Event fired by the {@link #render} method. Actual rendering is executed as a listener to\n\t * this event with the default priority.\n\t *\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * @event render\n\t */\n}\n\nmix( View, DomEmitterMixin );\nmix( View, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/editorui/editoruiview\n */\n\n/* globals document */\n\nimport View from '../view';\nimport Template from '../template';\n\nimport '../../theme/components/editorui/editorui.css';\n\n/**\n * The editor UI view class. Base class for the editor main views.\n *\n * @extends module:ui/view~View\n */\nexport default class EditorUIView extends View {\n\t/**\n\t * Creates an instance of the editor UI view class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Collection of the child views, detached from the DOM\n\t\t * structure of the editor, like panels, icons etc.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection} #body\n\t\t */\n\t\tthis.body = this.createCollection();\n\n\t\t/**\n\t\t * The element holding elements of the 'body' region.\n\t\t *\n\t\t * @private\n\t\t * @member {HTMLElement} #_bodyCollectionContainer\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis._renderBodyCollection();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tthis._bodyCollectionContainer.remove();\n\n\t\treturn super.destroy();\n\t}\n\n\t/**\n\t * Creates and appends to `<body>` the {@link #body} collection container.\n\t *\n\t * @private\n\t */\n\t_renderBodyCollection() {\n\t\tconst locale = this.locale;\n\t\tconst bodyElement = this._bodyCollectionContainer = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset_all',\n\t\t\t\t\t'ck-body',\n\t\t\t\t\t'ck-rounded-corners'\n\t\t\t\t],\n\t\t\t\tdir: locale.uiLanguageDirection,\n\t\t\t},\n\t\t\tchildren: this.body\n\t\t} ).render();\n\n\t\tdocument.body.appendChild( bodyElement );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/label/labelview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/label/label.css';\n\n/**\n * The label view class.\n *\n * @extends module:ui/view~View\n */\nexport default class LabelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The text of the label.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #text\n\t\t */\n\t\tthis.set( 'text' );\n\n\t\t/**\n\t\t * The `for` attribute of the label (i.e. to pair with an `<input>` element).\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #for\n\t\t */\n\t\tthis.set( 'for' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'label',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-label'\n\t\t\t\t],\n\t\t\t\tfor: bind.to( 'for' )\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: bind.to( 'text' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/editorui/boxed/boxededitoruiview\n */\nimport EditorUIView from '../../editorui/editoruiview';\nimport LabelView from '../../label/labelview';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\n/**\n * The boxed editor UI view class. This class represents an editor interface\n * consisting of a toolbar and an editable area, enclosed within a box.\n *\n * @extends module:ui/editorui/editoruiview~EditorUIView\n */\nexport default class BoxedEditorUIView extends EditorUIView {\n /**\n\t * Creates an instance of the boxed editor UI view class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The locale instance..\n\t */\n constructor(locale) {\n super(locale);\n const ariaLabelUid = uid();\n /**\n\t\t * Collection of the child views located in the top (`.ck-editor__top`)\n\t\t * area of the UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.top = this.createCollection();\n /**\n\t\t * Collection of the child views located in the main (`.ck-editor__main`)\n\t\t * area of the UI.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.main = this.createCollection();\n /**\n\t\t * Voice label of the UI.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #_voiceLabelView\n\t\t */\n this._voiceLabelView = this._createVoiceLabel(ariaLabelUid);\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-reset',\n 'ck-editor',\n 'ck-rounded-corners'\n ],\n role: 'application',\n dir: locale.uiLanguageDirection,\n lang: locale.uiLanguage,\n 'aria-labelledby': `ck-editor__aria-label_${ ariaLabelUid }`\n },\n children: [\n this._voiceLabelView,\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-editor__top',\n 'ck-reset_all'\n ],\n role: 'presentation'\n },\n children: this.top\n },\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-editor__main'\n ],\n role: 'presentation'\n },\n children: this.main\n }\n ]\n });\n }\n /**\n\t * Creates a voice label view instance.\n\t *\n\t * @private\n\t * @returns {module:ui/label/labelview~LabelView}\n\t */\n _createVoiceLabel(ariaLabelUid) {\n const t = this.t;\n const voiceLabel = new LabelView();\n voiceLabel.text = t('bl');\n voiceLabel.extendTemplate({\n attributes: {\n id: `ck-editor__aria-label_${ ariaLabelUid }`,\n class: 'ck-voice-label'\n }\n });\n return voiceLabel;\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/editableui/inline/inlineeditableuiview\n */\nimport EditableUIView from '../../editableui/editableuiview';\n/**\n * The inline editable UI class implementing an inline {@link module:ui/editableui/editableuiview~EditableUIView}.\n *\n * @extends module:ui/editableui/editableuiview~EditableUIView\n */\nexport default class InlineEditableUIView extends EditableUIView {\n /**\n\t * Creates an instance of the InlineEditableUIView class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance the editable is related to.\n\t * @param {HTMLElement} [editableElement] The editable element. If not specified, the\n\t * {@link module:ui/editableui/editableuiview~EditableUIView}\n\t * will create it. Otherwise, the existing element will be used.\n\t */\n constructor(locale, editingView, editableElement) {\n super(locale, editingView, editableElement);\n this.extendTemplate({\n attributes: {\n role: 'textbox',\n class: 'ck-editor__editable_inline'\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n const editingView = this._editingView;\n const t = this.t;\n editingView.change(writer => {\n const viewRoot = editingView.document.getRoot(this.name);\n writer.setAttribute('aria-label', t('bu', [this.name]), viewRoot);\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/editableui/editableuiview\n */\n\nimport View from '../view';\n\n/**\n * The editable UI view class.\n *\n * @extends module:ui/view~View\n */\nexport default class EditableUIView extends View {\n\t/**\n\t * Creates an instance of EditableUIView class.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The locale instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance the editable is related to.\n\t * @param {HTMLElement} [editableElement] The editable element. If not specified, this view\n\t * should create it. Otherwise, the existing element should be used.\n\t */\n\tconstructor( locale, editingView, editableElement ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-content',\n\t\t\t\t\t'ck-editor__editable',\n\t\t\t\t\t'ck-rounded-corners'\n\t\t\t\t],\n\t\t\t\tlang: locale.contentLanguage,\n\t\t\t\tdir: locale.contentLanguageDirection\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * The name of the editable UI view.\n\t\t *\n\t\t * @member {String} #name\n\t\t */\n\t\tthis.name = null;\n\n\t\t/**\n\t\t * Controls whether the editable is focused, i.e. the user is typing in it.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isFocused\n\t\t */\n\t\tthis.set( 'isFocused', false );\n\n\t\t/**\n\t\t * The element which is the main editable element (usually the one with `contentEditable=\"true\"`).\n\t\t *\n\t\t * @private\n\t\t * @member {HTMLElement} #_editableElement\n\t\t */\n\t\tthis._editableElement = editableElement;\n\n\t\t/**\n\t\t * Whether an external {@link #_editableElement} was passed into the constructor, which also means\n\t\t * the view will not render its {@link #template}.\n\t\t *\n\t\t * @private\n\t\t * @member {Boolean} #_hasExternalElement\n\t\t */\n\t\tthis._hasExternalElement = !!this._editableElement;\n\n\t\t/**\n\t\t * The editing view instance the editable is related to. Editable uses the editing\n\t\t * view to dynamically modify its certain DOM attributes after {@link #render rendering}.\n\t\t *\n\t\t * **Note**: The DOM attributes are performed by the editing view and not UI\n\t\t * {@link module:ui/view~View#bindTemplate template bindings} because once rendered,\n\t\t * the editable DOM element must remain under the full control of the engine to work properly.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:engine/view/view~View} #isFocused\n\t\t */\n\t\tthis._editingView = editingView;\n\t}\n\n\t/**\n\t * Renders the view by either applying the {@link #template} to the existing\n\t * {@link #_editableElement} or assigning {@link #element} as {@link #_editableElement}.\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tif ( this._hasExternalElement ) {\n\t\t\tthis.template.apply( this.element = this._editableElement );\n\t\t} else {\n\t\t\tthis._editableElement = this.element;\n\t\t}\n\n\t\tthis.on( 'change:isFocused', () => this._updateIsFocusedClasses() );\n\t\tthis._updateIsFocusedClasses();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._hasExternalElement ) {\n\t\t\tthis.template.revert( this._editableElement );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n\n\t/**\n\t * Updates the `ck-focused` and `ck-blurred` CSS classes on the {@link #element} according to\n\t * the {@link #isFocused} property value using the {@link #_editingView editing view} API.\n\t *\n\t * @private\n\t */\n\t_updateIsFocusedClasses() {\n\t\tconst editingView = this._editingView;\n\n\t\tif ( editingView.isRenderingInProgress ) {\n\t\t\tupdateAfterRender( this );\n\t\t} else {\n\t\t\tupdate( this );\n\t\t}\n\n\t\tfunction update( view ) {\n\t\t\teditingView.change( writer => {\n\t\t\t\tconst viewRoot = editingView.document.getRoot( view.name );\n\n\t\t\t\twriter.addClass( view.isFocused ? 'ck-focused' : 'ck-blurred', viewRoot );\n\t\t\t\twriter.removeClass( view.isFocused ? 'ck-blurred' : 'ck-focused', viewRoot );\n\t\t\t} );\n\t\t}\n\n\t\t// In a case of a multi-root editor, a callback will be attached more than once (one callback for each root).\n\t\t// While executing one callback the `isRenderingInProgress` observable is changing what causes executing another\n\t\t// callback and render is called inside the already pending render.\n\t\t// We need to be sure that callback is executed only when the value has changed from `true` to `false`.\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/1676.\n\t\tfunction updateAfterRender( view ) {\n\t\t\teditingView.once( 'change:isRenderingInProgress', ( evt, name, value ) => {\n\t\t\t\tif ( !value ) {\n\t\t\t\t\tupdate( view );\n\t\t\t\t} else {\n\t\t\t\t\tupdateAfterRender( view );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/tounit\n */\n\n/**\n * Returns a helper function, which adds a desired trailing\n * `unit` to the passed value.\n *\n * @param {String} unit An unit like \"px\" or \"em\".\n * @returns {module:utils/dom/tounit~helper}\n */\nexport default function toUnit( unit ) {\n\t/**\n\t * A function, which adds a pre–defined trailing `unit`\n\t * to the passed `value`.\n\t *\n\t * @function helper\n \t * @param {*} value A value to be given the unit.\n \t * @returns {String} A value with the trailing unit.\n\t */\n\treturn value => value + unit;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/panel/sticky/stickypanelview\n */\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport View from '../../view';\nimport Template from '../../template';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\n\nimport '../../../theme/components/panel/stickypanel.css';\n\nconst toPx = toUnit( 'px' );\n\n/**\n * The sticky panel view class.\n */\nexport default class StickyPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the sticky panel should be active.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isActive\n\t\t */\n\t\tthis.set( 'isActive', false );\n\n\t\t/**\n\t\t * Controls whether the sticky panel is in the \"sticky\" state.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #isSticky\n\t\t */\n\t\tthis.set( 'isSticky', false );\n\n\t\t/**\n\t\t * The limiter element for the sticky panel instance. Its bounding rect limits\n\t\t * the \"stickyness\" of the panel, i.e. when the panel reaches the bottom\n\t\t * edge of the limiter, it becomes sticky to that edge and does not float\n\t\t * off the limiter. It is mandatory for the panel to work properly and once\n\t\t * set, it cannot be changed.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {HTMLElement} #limiterElement\n\t\t */\n\t\tthis.set( 'limiterElement', null );\n\n\t\t/**\n\t\t * The offset from the bottom edge of {@link #limiterElement}\n\t\t * which stops the panel from stickying any further to prevent limiter's content\n\t\t * from being completely covered.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @default 50\n\t\t * @member {Number} #limiterBottomOffset\n\t\t */\n\t\tthis.set( 'limiterBottomOffset', 50 );\n\n\t\t/**\n\t\t * The offset from the top edge of the web browser's viewport which makes the\n\t\t * panel become sticky. The default value is `0`, which means the panel becomes\n\t\t * sticky when it's upper edge touches the top of the page viewport.\n\t\t *\n\t\t * This attribute is useful when the web page has UI elements positioned to the top\n\t\t * either using `position: fixed` or `position: sticky`, which would cover the\n\t\t * sticky panel or vice–versa (depending on the `z-index` hierarchy).\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #viewportTopOffset\n\t\t */\n\t\tthis.set( 'viewportTopOffset', 0 );\n\n\t\t/**\n\t\t * Controls the `margin-left` CSS style of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {String} #_marginLeft\n\t\t */\n\t\tthis.set( '_marginLeft', null );\n\n\t\t/**\n\t\t * Set `true` if the sticky panel reached the bottom edge of the\n\t\t * {@link #limiterElement}.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_isStickyToTheLimiter\n\t\t */\n\t\tthis.set( '_isStickyToTheLimiter', false );\n\n\t\t/**\n\t\t * Set `true` if the sticky panel uses the {@link #viewportTopOffset},\n\t\t * i.e. not {@link #_isStickyToTheLimiter} and the {@link #viewportTopOffset}\n\t\t * is not `0`.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_hasViewportTopOffset\n\t\t */\n\t\tthis.set( '_hasViewportTopOffset', false );\n\n\t\t/**\n\t\t * Collection of the child views which creates balloon panel contents.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.content = this.createCollection();\n\n\t\t/**\n\t\t * The DOM bounding client rect of the {@link module:ui/view~View#element} of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @member {Object} #_panelRect\n\t\t */\n\n\t\t/**\n\t\t * The DOM bounding client rect of the {@link #limiterElement}\n\t\t * of the panel.\n\t\t *\n\t\t * @protected\n\t\t * @member {Object} #_limiterRect\n\t\t */\n\n\t\t/**\n\t\t * A dummy element which visually fills the space as long as the\n\t\t * actual panel is sticky. It prevents flickering of the UI.\n\t\t *\n\t\t * @protected\n\t\t * @property {HTMLElement}\n\t\t */\n\t\tthis._contentPanelPlaceholder = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel__placeholder'\n\t\t\t\t],\n\t\t\t\tstyle: {\n\t\t\t\t\tdisplay: bind.to( 'isSticky', isSticky => isSticky ? 'block' : 'none' ),\n\t\t\t\t\theight: bind.to( 'isSticky', isSticky => {\n\t\t\t\t\t\treturn isSticky ? toPx( this._panelRect.height ) : null;\n\t\t\t\t\t} )\n\t\t\t\t}\n\t\t\t}\n\t\t} ).render();\n\n\t\t/**\n\t\t * The panel which accepts children into {@link #content} collection.\n\t\t * Also an element which is positioned when {@link #isSticky}.\n\t\t *\n\t\t * @protected\n\t\t * @property {HTMLElement}\n\t\t */\n\t\tthis._contentPanel = new Template( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel__content',\n\t\t\t\t\t// Toggle class of the panel when \"sticky\" state changes in the view.\n\t\t\t\t\tbind.if( 'isSticky', 'ck-sticky-panel__content_sticky' ),\n\t\t\t\t\tbind.if( '_isStickyToTheLimiter', 'ck-sticky-panel__content_sticky_bottom-limit' ),\n\t\t\t\t],\n\t\t\t\tstyle: {\n\t\t\t\t\twidth: bind.to( 'isSticky', isSticky => {\n\t\t\t\t\t\treturn isSticky ? toPx( this._contentPanelPlaceholder.getBoundingClientRect().width ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\ttop: bind.to( '_hasViewportTopOffset', _hasViewportTopOffset => {\n\t\t\t\t\t\treturn _hasViewportTopOffset ? toPx( this.viewportTopOffset ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\tbottom: bind.to( '_isStickyToTheLimiter', _isStickyToTheLimiter => {\n\t\t\t\t\t\treturn _isStickyToTheLimiter ? toPx( this.limiterBottomOffset ) : null;\n\t\t\t\t\t} ),\n\n\t\t\t\t\tmarginLeft: bind.to( '_marginLeft' )\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tchildren: this.content\n\t\t} ).render();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-sticky-panel'\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis._contentPanelPlaceholder,\n\t\t\t\tthis._contentPanel\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Check if the panel should go into the sticky state immediately.\n\t\tthis._checkIfShouldBeSticky();\n\n\t\t// Update sticky state of the panel as the window is being scrolled.\n\t\tthis.listenTo( global.window, 'scroll', () => {\n\t\t\tthis._checkIfShouldBeSticky();\n\t\t} );\n\n\t\t// Synchronize with `model.isActive` because sticking an inactive panel is pointless.\n\t\tthis.listenTo( this, 'change:isActive', () => {\n\t\t\tthis._checkIfShouldBeSticky();\n\t\t} );\n\t}\n\n\t/**\n\t * Analyzes the environment to decide whether the panel should\n\t * be sticky or not.\n\t *\n\t * @protected\n\t */\n\t_checkIfShouldBeSticky() {\n\t\tconst panelRect = this._panelRect = this._contentPanel.getBoundingClientRect();\n\t\tlet limiterRect;\n\n\t\tif ( !this.limiterElement ) {\n\t\t\tthis.isSticky = false;\n\t\t} else {\n\t\t\tlimiterRect = this._limiterRect = this.limiterElement.getBoundingClientRect();\n\n\t\t\t// The panel must be active to become sticky.\n\t\t\tthis.isSticky = this.isActive &&\n\t\t\t\t// The limiter's top edge must be beyond the upper edge of the visible viewport (+the viewportTopOffset).\n\t\t\t\tlimiterRect.top < this.viewportTopOffset &&\n\t\t\t\t// The model#limiterElement's height mustn't be smaller than the panel's height and model#limiterBottomOffset.\n\t\t\t\t// There's no point in entering the sticky mode if the model#limiterElement is very, very small, because\n\t\t\t\t// it would immediately set model#_isStickyToTheLimiter true and, given model#limiterBottomOffset, the panel\n\t\t\t\t// would be positioned before the model#limiterElement.\n\t\t\t\tthis._panelRect.height + this.limiterBottomOffset < limiterRect.height;\n\t\t}\n\n\t\t// Stick the panel to the top edge of the viewport simulating CSS position:sticky.\n\t\t// TODO: Possibly replaced by CSS in the future http://caniuse.com/#feat=css-sticky\n\t\tif ( this.isSticky ) {\n\t\t\tthis._isStickyToTheLimiter =\n\t\t\t\tlimiterRect.bottom < panelRect.height + this.limiterBottomOffset + this.viewportTopOffset;\n\t\t\tthis._hasViewportTopOffset = !this._isStickyToTheLimiter && !!this.viewportTopOffset;\n\t\t\tthis._marginLeft = this._isStickyToTheLimiter ? null : toPx( -global.window.scrollX );\n\t\t}\n\t\t// Detach the panel from the top edge of the viewport.\n\t\telse {\n\t\t\tthis._isStickyToTheLimiter = false;\n\t\t\tthis._hasViewportTopOffset = false;\n\t\t\tthis._marginLeft = null;\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/focuscycler\n */\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\n\n/**\n * A utility class that helps cycling over focusable {@link module:ui/view~View views} in a\n * {@link module:ui/viewcollection~ViewCollection} when the focus is tracked by the\n * {@link module:utils/focustracker~FocusTracker} instance. It helps implementing keyboard\n * navigation in HTML forms, toolbars, lists and the like.\n *\n * To work properly it requires:\n * * a collection of focusable (HTML `tabindex` attribute) views that implement the `focus()` method,\n * * an associated focus tracker to determine which view is focused.\n *\n * A simple cycler setup can look like this:\n *\n *\t\tconst focusables = new ViewCollection();\n *\t\tconst focusTracker = new FocusTracker();\n *\n *\t\t// Add focusable views to the focus tracker.\n *\t\tfocusTracker.add( ... );\n *\n * Then, the cycler can be used manually:\n *\n *\t\tconst cycler = new FocusCycler( { focusables, focusTracker } );\n *\n *\t\t// Will focus the first focusable view in #focusables.\n *\t\tcycler.focusFirst();\n *\n *\t\t// Will log the next focusable item in #focusables.\n *\t\tconsole.log( cycler.next );\n *\n * Alternatively, it can work side by side with the {@link module:utils/keystrokehandler~KeystrokeHandler}:\n *\n *\t\tconst keystrokeHandler = new KeystrokeHandler();\n *\n *\t\t// Activate the keystroke handler.\n *\t\tkeystrokeHandler.listenTo( sourceOfEvents );\n *\n *\t\tconst cycler = new FocusCycler( {\n *\t\t\tfocusables, focusTracker, keystrokeHandler,\n *\t\t\tactions: {\n *\t\t\t\t// When arrowup of arrowleft is detected by the #keystrokeHandler,\n *\t\t\t\t// focusPrevious() will be called on the cycler.\n *\t\t\t\tfocusPrevious: [ 'arrowup', 'arrowleft' ],\n *\t\t\t}\n *\t\t} );\n */\nexport default class FocusCycler {\n\t/**\n\t * Creates an instance of the focus cycler utility.\n\t *\n\t * @param {Object} options Configuration options.\n\t * @param {module:utils/collection~Collection|Object} options.focusables\n\t * @param {module:utils/focustracker~FocusTracker} options.focusTracker\n\t * @param {module:utils/keystrokehandler~KeystrokeHandler} [options.keystrokeHandler]\n\t * @param {Object} [options.actions]\n\t */\n\tconstructor( options ) {\n\t\tObject.assign( this, options );\n\n\t\t/**\n\t\t * A {@link module:ui/view~View view} collection that the cycler operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/collection~Collection} #focusables\n\t\t */\n\n\t\t/**\n\t\t * A focus tracker instance that the cycler uses to determine the current focus\n\t\t * state in {@link #focusables}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker} #focusTracker\n\t\t */\n\n\t\t/**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}\n\t\t * which can respond to certain keystrokes and cycle the focus.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler} #keystrokeHandler\n\t\t */\n\n\t\t/**\n\t\t * Actions that the cycler can take when a keystroke is pressed. Requires\n\t\t * `options.keystrokeHandler` to be passed and working. When an action is\n\t\t * performed, `preventDefault` and `stopPropagation` will be called on the event\n\t\t * the keystroke fired in the DOM.\n\t\t *\n\t\t *\t\tactions: {\n\t\t *\t\t\t// Will call #focusPrevious() when arrowleft or arrowup is pressed.\n\t\t *\t\t\tfocusPrevious: [ 'arrowleft', 'arrowup' ],\n\t\t *\n\t\t *\t\t\t// Will call #focusNext() when arrowdown is pressed.\n\t\t *\t\t\tfocusNext: 'arrowdown'\n\t\t *\t\t}\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object} #actions\n\t\t */\n\n\t\tif ( options.actions && options.keystrokeHandler ) {\n\t\t\tfor ( const methodName in options.actions ) {\n\t\t\t\tlet actions = options.actions[ methodName ];\n\n\t\t\t\tif ( typeof actions == 'string' ) {\n\t\t\t\t\tactions = [ actions ];\n\t\t\t\t}\n\n\t\t\t\tfor ( const keystroke of actions ) {\n\t\t\t\t\toptions.keystrokeHandler.set( keystroke, ( data, cancel ) => {\n\t\t\t\t\t\tthis[ methodName ]();\n\t\t\t\t\t\tcancel();\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns the first focusable view in {@link #focusables}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #first\n\t */\n\tget first() {\n\t\treturn this.focusables.find( isFocusable ) || null;\n\t}\n\n\t/**\n\t * Returns the last focusable view in {@link #focusables}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #last\n\t */\n\tget last() {\n\t\treturn this.focusables.filter( isFocusable ).slice( -1 )[ 0 ] || null;\n\t}\n\n\t/**\n\t * Returns the next focusable view in {@link #focusables} based on {@link #current}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #next\n\t */\n\tget next() {\n\t\treturn this._getFocusableItem( 1 );\n\t}\n\n\t/**\n\t * Returns the previous focusable view in {@link #focusables} based on {@link #current}.\n\t * Returns `null` if there is none.\n\t *\n\t * @readonly\n\t * @member {module:ui/view~View|null} #previous\n\t */\n\tget previous() {\n\t\treturn this._getFocusableItem( -1 );\n\t}\n\n\t/**\n\t * An index of the view in the {@link #focusables} which is focused according\n\t * to {@link #focusTracker}. Returns `null` when there is no such view.\n\t *\n\t * @readonly\n\t * @member {Number|null} #current\n\t */\n\tget current() {\n\t\tlet index = null;\n\n\t\t// There's no focused view in the focusables.\n\t\tif ( this.focusTracker.focusedElement === null ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tthis.focusables.find( ( view, viewIndex ) => {\n\t\t\tconst focused = view.element === this.focusTracker.focusedElement;\n\n\t\t\tif ( focused ) {\n\t\t\t\tindex = viewIndex;\n\t\t\t}\n\n\t\t\treturn focused;\n\t\t} );\n\n\t\treturn index;\n\t}\n\n\t/**\n\t * Focuses the {@link #first} item in {@link #focusables}.\n\t */\n\tfocusFirst() {\n\t\tthis._focus( this.first );\n\t}\n\n\t/**\n\t * Focuses the {@link #last} item in {@link #focusables}.\n\t */\n\tfocusLast() {\n\t\tthis._focus( this.last );\n\t}\n\n\t/**\n\t * Focuses the {@link #next} item in {@link #focusables}.\n\t */\n\tfocusNext() {\n\t\tthis._focus( this.next );\n\t}\n\n\t/**\n\t * Focuses the {@link #previous} item in {@link #focusables}.\n\t */\n\tfocusPrevious() {\n\t\tthis._focus( this.previous );\n\t}\n\n\t/**\n\t * Focuses the given view if it exists.\n\t *\n\t * @protected\n\t * @param {module:ui/view~View} view\n\t */\n\t_focus( view ) {\n\t\tif ( view ) {\n\t\t\tview.focus();\n\t\t}\n\t}\n\n\t/**\n\t * Returns the next or previous focusable view in {@link #focusables} with respect\n\t * to {@link #current}.\n\t *\n\t * @protected\n\t * @param {Number} step Either `1` for checking forward from {@link #current} or\n\t * `-1` for checking backwards.\n\t * @returns {module:ui/view~View|null}\n\t */\n\t_getFocusableItem( step ) {\n\t\t// Cache for speed.\n\t\tconst current = this.current;\n\t\tconst collectionLength = this.focusables.length;\n\n\t\tif ( !collectionLength ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Start from the beginning if no view is focused.\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/206\n\t\tif ( current === null ) {\n\t\t\treturn this[ step === 1 ? 'first' : 'last' ];\n\t\t}\n\n\t\t// Cycle in both directions.\n\t\tlet index = ( current + collectionLength + step ) % collectionLength;\n\n\t\tdo {\n\t\t\tconst view = this.focusables.get( index );\n\n\t\t\t// TODO: Check if view is visible.\n\t\t\tif ( isFocusable( view ) ) {\n\t\t\t\treturn view;\n\t\t\t}\n\n\t\t\t// Cycle in both directions.\n\t\t\tindex = ( index + collectionLength + step ) % collectionLength;\n\t\t} while ( index !== current );\n\n\t\treturn null;\n\t}\n}\n\n// Checks whether a view is focusable.\n//\n// @private\n// @param {module:ui/view~View} view A view to be checked.\n// @returns {Boolean}\nfunction isFocusable( view ) {\n\treturn !!( view.focus && global.window.getComputedStyle( view.element ).display != 'none' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/toolbar/toolbarseparatorview\n */\n\nimport View from '../view';\n\n/**\n * The toolbar separator view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ToolbarSeparatorView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-toolbar__separator'\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getresizeobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport mix from '../mix';\nimport global from './global';\nimport Rect from './rect';\nimport DomEmitterMixin from './emittermixin';\n\nconst RESIZE_CHECK_INTERVAL = 100;\n\n/**\n * Returns an instance of [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver).\n * In browsers that support the `ResizeObserver` API, the native observer instance is returned.\n * In other browsers, a polyfilled instance is returned instead with a compatible API.\n *\n * [Learn more](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) about the native API.\n *\n * @param {Function} callback A function called when any observed element was resized. Refer to the\n * native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API to\n * learn more.\n * @returns {module:utils/dom/getresizeobserver~ResizeObserver} An observer instance.\n */\nexport default function getResizeObserver( callback ) {\n\t// TODO: One day, the `ResizeObserver` API will be supported in all modern web browsers.\n\t// When it happens, this module will no longer make sense and should be removed and\n\t// the native implementation should be used across the project to save bytes.\n\t// Check out https://caniuse.com/#feat=resizeobserver.\n\tif ( typeof global.window.ResizeObserver === 'function' ) {\n\t\treturn new global.window.ResizeObserver( callback );\n\t} else {\n\t\treturn new ResizeObserverPolyfill( callback );\n\t}\n}\n\n/**\n * A polyfill class for the native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver).\n *\n * @private\n * @mixes module:utils/domemittermixin~DomEmitterMixin\n */\nclass ResizeObserverPolyfill {\n\t/**\n\t * Creates an instance of the {@link module:utils/dom/getresizeobserver~ResizeObserverPolyfill} class.\n\t *\n\t * It synchronously reacts to resize of the window to check if observed elements' geometry changed.\n\t *\n\t * Additionally, the polyfilled observer uses a timeout to check if observed elements' geometry has changed\n\t * in some other way (dynamic layouts, scrollbars showing up, etc.), so its response can also be asynchronous.\n\t *\n\t * @param {Function} callback A function called when any observed element was resized. Refer to the\n\t * native [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API to\n\t * learn more.\n\t */\n\tconstructor( callback ) {\n\t\t/**\n\t\t * A function called when any observed {@link #_elements element} was resized.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Function}\n\t\t */\n\t\tthis._callback = callback;\n\n\t\t/**\n\t\t * DOM elements currently observed by the observer instance.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._elements = new Set();\n\n\t\t/**\n\t\t * Cached DOM {@link #_elements elements} bounding rects to compare to upon the next check.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.<HTMLElement,module:utils/dom/rect~Rect>}\n\t\t */\n\t\tthis._previousRects = new Map();\n\n\t\t/**\n\t\t * An UID of the current timeout upon which the observed elements rects\n\t\t * will be compared to the {@link #_previousRects previous rects} from the past.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Map.<HTMLElement,module:utils/dom/rect~Rect>}\n\t\t */\n\t\tthis._periodicCheckTimeout = null;\n\t}\n\n\t/**\n\t * Starts observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/observe).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tobserve( element ) {\n\t\tthis._elements.add( element );\n\n\t\tif ( this._elements.size === 1 ) {\n\t\t\tthis._startPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * Stops observing a DOM element.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/unobserve).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tunobserve( element ) {\n\t\tthis._elements.delete( element );\n\t\tthis._previousRects.delete( element );\n\n\t\tif ( !this._elements.size ) {\n\t\t\tthis._stopPeriodicCheck();\n\t\t}\n\t}\n\n\t/**\n\t * Stops observing all observed DOM elements.\n\t *\n\t * Learn more in the\n\t * [native method documentation](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver/disconnect).\n\t *\n\t * @param {HTMLElement} element\n\t */\n\tdisconnect() {\n\t\tthis._elements.forEach( element => this.unobserve( element ) );\n\t}\n\n\t/**\n\t * When called, the observer calls the {@link #_callback resize callback} for all observed\n\t * {@link #_elements elements} but also starts checking periodically for changes in the elements' geometry.\n\t * If some are detected, {@link #_callback resize callback} is called for relevant elements that were resized.\n\t *\n\t * @protected\n\t */\n\t_startPeriodicCheck() {\n\t\tconst periodicCheck = () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t\tthis._periodicCheckTimeout = setTimeout( periodicCheck, RESIZE_CHECK_INTERVAL );\n\t\t};\n\n\t\tthis.listenTo( global.window, 'resize', () => {\n\t\t\tthis._checkElementRectsAndExecuteCallback();\n\t\t} );\n\n\t\tperiodicCheck();\n\t}\n\n\t/**\n\t * Stops checking for changes in all observed {@link #_elements elements} geometry.\n\t *\n\t * @protected\n\t */\n\t_stopPeriodicCheck() {\n\t\tclearTimeout( this._periodicCheckTimeout );\n\t\tthis.stopListening();\n\t\tthis._previousRects.clear();\n\t}\n\n\t/**\n\t * Checks if the geometry of any of the {@link #_elements element} has changed. If so, executes\n\t * the {@link #_callback resize callback} with element geometry data.\n\t *\n\t * @protected\n\t */\n\t_checkElementRectsAndExecuteCallback() {\n\t\tconst entries = [];\n\n\t\tfor ( const element of this._elements ) {\n\t\t\tif ( this._hasRectChanged( element ) ) {\n\t\t\t\tentries.push( {\n\t\t\t\t\ttarget: element,\n\t\t\t\t\tcontentRect: this._previousRects.get( element )\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\tif ( entries.length ) {\n\t\t\tthis._callback( entries );\n\t\t}\n\t}\n\n\t/**\n\t * Compares the DOM element geometry to the {@link #_previousRects cached geometry} from the past.\n\t * Returns `true` if geometry has changed or the element is checked for the first time.\n\t *\n\t * @protected\n\t * @param {HTMLElement} element\n\t * @returns {Boolean}\n\t */\n\t_hasRectChanged( element ) {\n\t\tif ( !element.ownerDocument.body.contains( element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst currentRect = new Rect( element );\n\t\tconst previousRect = this._previousRects.get( element );\n\n\t\t// The first check should always yield true despite no Previous rect to compare to.\n\t\t// The native ResizeObserver does that and... that makes sense. Sort of.\n\t\tconst hasChanged = !previousRect || !previousRect.isEqual( currentRect );\n\n\t\tthis._previousRects.set( element, currentRect );\n\n\t\treturn hasChanged;\n\t}\n}\n\nmix( ResizeObserverPolyfill, DomEmitterMixin );\n\n/**\n * A resize observer object (either native or {@link module:utils/dom/getresizeobserver~getResizeObserver polyfilled})\n * offering the [`ResizeObserver`](https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver) API.\n *\n * @typedef {Function} module:utils/dom/getresizeobserver~ResizeObserver\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/dropdownpanelview\n */\n\nimport View from '../view';\n\n/**\n * The dropdown panel view class.\n *\n * See {@link module:ui/dropdown/dropdownview~DropdownView} to learn about the common usage.\n *\n * @extends module:ui/view~View\n */\nexport default class DropdownPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the panel is visible.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isVisible\n\t\t */\n\t\tthis.set( 'isVisible', false );\n\n\t\t/**\n\t\t * The position of the panel, relative to the parent.\n\t\t *\n\t\t * This property is reflected in the CSS class set to {@link #element} that controls\n\t\t * the position of the panel.\n\t\t *\n\t\t * @observable\n\t\t * @default 'se'\n\t\t * @member {'se'|'sw'|'ne'|'nw'} #position\n\t\t */\n\t\tthis.set( 'position', 'se' );\n\n\t\t/**\n\t\t * Collection of the child views in this panel.\n\t\t *\n\t\t * A common child type is the {@link module:ui/list/listview~ListView} and {@link module:ui/toolbar/toolbarview~ToolbarView}.\n\t\t * See {@link module:ui/dropdown/utils~addListToDropdown} and\n\t\t * {@link module:ui/dropdown/utils~addToolbarToDropdown} to learn more about child views of dropdowns.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset',\n\t\t\t\t\t'ck-dropdown__panel',\n\t\t\t\t\tbind.to( 'position', value => `ck-dropdown__panel_${ value }` ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-dropdown__panel-visible' )\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.children,\n\n\t\t\ton: {\n\t\t\t\t// Drag and drop in the panel should not break the selection in the editor.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/228\n\t\t\t\tselectstart: bind.to( evt => evt.preventDefault() )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the view element or first item in view collection on opening dropdown's panel.\n\t *\n\t * See also {@link module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable}.\n\t */\n\tfocus() {\n\t\tif ( this.children.length ) {\n\t\t\tthis.children.first.focus();\n\t\t}\n\t}\n\n\t/**\n\t * Focuses the view element or last item in view collection on opening dropdown's panel.\n\t *\n\t * See also {@link module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable}.\n\t */\n\tfocusLast() {\n\t\tif ( this.children.length ) {\n\t\t\tconst lastChild = this.children.last;\n\n\t\t\tif ( typeof lastChild.focusLast === 'function' ) {\n\t\t\t\tlastChild.focusLast();\n\t\t\t} else {\n\t\t\t\tlastChild.focus();\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/position\n */\n\nimport global from './global';\nimport Rect from './rect';\nimport getPositionedAncestor from './getpositionedancestor';\nimport getBorderWidths from './getborderwidths';\nimport { isFunction } from 'lodash-es';\n\n/**\n * Calculates the `position: absolute` coordinates of a given element so it can be positioned with respect to the\n * target in the visually most efficient way, taking various restrictions like viewport or limiter geometry\n * into consideration.\n *\n *\t\t// The element which is to be positioned.\n *\t\tconst element = document.body.querySelector( '#toolbar' );\n *\n *\t\t// A target to which the element is positioned relatively.\n *\t\tconst target = document.body.querySelector( '#container' );\n *\n *\t\t// Finding the optimal coordinates for the positioning.\n *\t\tconst { left, top, name } = getOptimalPosition( {\n *\t\t\telement: element,\n *\t\t\ttarget: target,\n *\n * \t\t\t// The algorithm will chose among these positions to meet the requirements such\n * \t\t\t// as \"limiter\" element or \"fitInViewport\", set below. The positions are considered\n * \t\t\t// in the order of the array.\n *\t\t\tpositions: [\n *\t\t\t\t//\n *\t\t\t \t//\t[ Target ]\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t| Element |\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\n *\t\t\t\ttargetRect => ( {\n *\t\t\t\t\ttop: targetRect.bottom,\n *\t\t\t\t\tleft: targetRect.left,\n *\t\t\t\t\tname: 'mySouthEastPosition'\n *\t\t\t\t} ),\n *\n *\t\t\t\t//\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t| Element |\n *\t\t\t\t//\t+-----------------+\n *\t\t\t\t//\t[ Target ]\n *\t\t\t\t//\n *\t\t\t\t( targetRect, elementRect ) => ( {\n *\t\t\t\t\ttop: targetRect.top - elementRect.height,\n *\t\t\t\t\tleft: targetRect.left,\n *\t\t\t\t\tname: 'myNorthEastPosition'\n *\t\t\t\t} )\n *\t\t\t],\n *\n *\t\t\t// Find a position such guarantees the element remains within visible boundaries of <body>.\n *\t\t\tlimiter: document.body,\n *\n *\t\t\t// Find a position such guarantees the element remains within visible boundaries of the browser viewport.\n *\t\t\tfitInViewport: true\n *\t\t} );\n *\n *\t\t// The best position which fits into document.body and the viewport. May be useful\n *\t\t// to set proper class on the `element`.\n *\t\tconsole.log( name ); // -> \"myNorthEastPosition\"\n *\n *\t\t// Using the absolute coordinates which has been found to position the element\n *\t\t// as in the diagram depicting the \"myNorthEastPosition\" position.\n *\t\telement.style.top = top;\n *\t\telement.style.left = left;\n *\n * @param {module:utils/dom/position~Options} options Positioning options object.\n * @returns {module:utils/dom/position~Position}\n */\nexport function getOptimalPosition( { element, target, positions, limiter, fitInViewport } ) {\n\t// If the {@link module:utils/dom/position~Options#target} is a function, use what it returns.\n\t// https://github.com/ckeditor/ckeditor5-utils/issues/157\n\tif ( isFunction( target ) ) {\n\t\ttarget = target();\n\t}\n\n\t// If the {@link module:utils/dom/position~Options#limiter} is a function, use what it returns.\n\t// https://github.com/ckeditor/ckeditor5-ui/issues/260\n\tif ( isFunction( limiter ) ) {\n\t\tlimiter = limiter();\n\t}\n\n\tconst positionedElementAncestor = getPositionedAncestor( element.parentElement );\n\tconst elementRect = new Rect( element );\n\tconst targetRect = new Rect( target );\n\n\tlet bestPosition;\n\tlet name;\n\n\t// If there are no limits, just grab the very first position and be done with that drama.\n\tif ( !limiter && !fitInViewport ) {\n\t\t[ name, bestPosition ] = getPosition( positions[ 0 ], targetRect, elementRect );\n\t} else {\n\t\tconst limiterRect = limiter && new Rect( limiter ).getVisible();\n\t\tconst viewportRect = fitInViewport && new Rect( global.window );\n\n\t\t[ name, bestPosition ] =\n\t\t\tgetBestPosition( positions, targetRect, elementRect, limiterRect, viewportRect ) ||\n\t\t\t// If there's no best position found, i.e. when all intersections have no area because\n\t\t\t// rects have no width or height, then just use the first available position.\n\t\t\tgetPosition( positions[ 0 ], targetRect, elementRect );\n\t}\n\n\tlet { left, top } = getAbsoluteRectCoordinates( bestPosition );\n\n\tif ( positionedElementAncestor ) {\n\t\tconst ancestorPosition = getAbsoluteRectCoordinates( new Rect( positionedElementAncestor ) );\n\t\tconst ancestorBorderWidths = getBorderWidths( positionedElementAncestor );\n\n\t\t// (https://github.com/ckeditor/ckeditor5-ui-default/issues/126)\n\t\t// If there's some positioned ancestor of the panel, then its `Rect` must be taken into\n\t\t// consideration. `Rect` is always relative to the viewport while `position: absolute` works\n\t\t// with respect to that positioned ancestor.\n\t\tleft -= ancestorPosition.left;\n\t\ttop -= ancestorPosition.top;\n\n\t\t// (https://github.com/ckeditor/ckeditor5-utils/issues/139)\n\t\t// If there's some positioned ancestor of the panel, not only its position must be taken into\n\t\t// consideration (see above) but also its internal scrolls. Scroll have an impact here because `Rect`\n\t\t// is relative to the viewport (it doesn't care about scrolling), while `position: absolute`\n\t\t// must compensate that scrolling.\n\t\tleft += positionedElementAncestor.scrollLeft;\n\t\ttop += positionedElementAncestor.scrollTop;\n\n\t\t// (https://github.com/ckeditor/ckeditor5-utils/issues/139)\n\t\t// If there's some positioned ancestor of the panel, then its `Rect` includes its CSS `borderWidth`\n\t\t// while `position: absolute` positioning does not consider it.\n\t\t// E.g. `{ position: absolute, top: 0, left: 0 }` means upper left corner of the element,\n\t\t// not upper-left corner of its border.\n\t\tleft -= ancestorBorderWidths.left;\n\t\ttop -= ancestorBorderWidths.top;\n\t}\n\n\treturn { left, top, name };\n}\n\n// For given position function, returns a corresponding `Rect` instance.\n//\n// @private\n// @param {Function} position A function returning {@link module:utils/dom/position~Position}.\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of positioned element.\n// @returns {Array} An array containing position name and its Rect.\nfunction getPosition( position, targetRect, elementRect ) {\n\tconst { left, top, name } = position( targetRect, elementRect );\n\n\treturn [ name, elementRect.clone().moveTo( left, top ) ];\n}\n\n// For a given array of positioning functions, returns such that provides the best\n// fit of the `elementRect` into the `limiterRect` and `viewportRect`.\n//\n// @private\n// @param {module:utils/dom/position~Options#positions} positions Functions returning\n// {@link module:utils/dom/position~Position} to be checked, in the order of preference.\n// @param {utils/dom/rect~Rect} targetRect A rect of the {@link module:utils/dom/position~Options#target}.\n// @param {utils/dom/rect~Rect} elementRect A rect of positioned {@link module:utils/dom/position~Options#element}.\n// @param {utils/dom/rect~Rect} limiterRect A rect of the {@link module:utils/dom/position~Options#limiter}.\n// @param {utils/dom/rect~Rect} viewportRect A rect of the viewport.\n// @returns {Array} An array containing the name of the position and it's rect.\nfunction getBestPosition( positions, targetRect, elementRect, limiterRect, viewportRect ) {\n\tlet maxLimiterIntersectArea = 0;\n\tlet maxViewportIntersectArea = 0;\n\tlet bestPositionRect;\n\tlet bestPositionName;\n\n\t// This is when element is fully visible.\n\tconst elementRectArea = elementRect.getArea();\n\n\tpositions.some( position => {\n\t\tconst [ positionName, positionRect ] = getPosition( position, targetRect, elementRect );\n\t\tlet limiterIntersectArea;\n\t\tlet viewportIntersectArea;\n\n\t\tif ( limiterRect ) {\n\t\t\tif ( viewportRect ) {\n\t\t\t\t// Consider only the part of the limiter which is visible in the viewport. So the limiter is getting limited.\n\t\t\t\tconst limiterViewportIntersectRect = limiterRect.getIntersection( viewportRect );\n\n\t\t\t\tif ( limiterViewportIntersectRect ) {\n\t\t\t\t\t// If the limiter is within the viewport, then check the intersection between that part of the\n\t\t\t\t\t// limiter and actual position.\n\t\t\t\t\tlimiterIntersectArea = limiterViewportIntersectRect.getIntersectionArea( positionRect );\n\t\t\t\t} else {\n\t\t\t\t\tlimiterIntersectArea = 0;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tlimiterIntersectArea = limiterRect.getIntersectionArea( positionRect );\n\t\t\t}\n\t\t}\n\n\t\tif ( viewportRect ) {\n\t\t\tviewportIntersectArea = viewportRect.getIntersectionArea( positionRect );\n\t\t}\n\n\t\t// The only criterion: intersection with the viewport.\n\t\tif ( viewportRect && !limiterRect ) {\n\t\t\tif ( viewportIntersectArea > maxViewportIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\t\t// The only criterion: intersection with the limiter.\n\t\telse if ( !viewportRect && limiterRect ) {\n\t\t\tif ( limiterIntersectArea > maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\t\t// Two criteria: intersection with the viewport and the limiter visible in the viewport.\n\t\telse {\n\t\t\tif ( viewportIntersectArea > maxViewportIntersectArea && limiterIntersectArea >= maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t} else if ( viewportIntersectArea >= maxViewportIntersectArea && limiterIntersectArea > maxLimiterIntersectArea ) {\n\t\t\t\tsetBestPosition();\n\t\t\t}\n\t\t}\n\n\t\tfunction setBestPosition() {\n\t\t\tmaxViewportIntersectArea = viewportIntersectArea;\n\t\t\tmaxLimiterIntersectArea = limiterIntersectArea;\n\t\t\tbestPositionRect = positionRect;\n\t\t\tbestPositionName = positionName;\n\t\t}\n\n\t\t// If a such position is found that element is fully container by the limiter then, obviously,\n\t\t// there will be no better one, so finishing.\n\t\treturn limiterIntersectArea === elementRectArea;\n\t} );\n\n\treturn bestPositionRect ? [ bestPositionName, bestPositionRect ] : null;\n}\n\n// DOMRect (also Rect) works in a scroll–independent geometry but `position: absolute` doesn't.\n// This function converts Rect to `position: absolute` coordinates.\n//\n// @private\n// @param {utils/dom/rect~Rect} rect A rect to be converted.\n// @returns {Object} Object containing `left` and `top` properties, in absolute coordinates.\nfunction getAbsoluteRectCoordinates( { left, top } ) {\n\tconst { scrollX, scrollY } = global.window;\n\n\treturn {\n\t\tleft: left + scrollX,\n\t\ttop: top + scrollY,\n\t};\n}\n\n/**\n * The `getOptimalPosition` helper options.\n *\n * @interface module:utils/dom/position~Options\n */\n\n/**\n * Element that is to be positioned.\n *\n * @member {HTMLElement} #element\n */\n\n/**\n * Target with respect to which the `element` is to be positioned.\n *\n * @member {HTMLElement|Range|ClientRect|Rect|Function} #target\n */\n\n/**\n * An array of functions which return {@link module:utils/dom/position~Position} relative\n * to the `target`, in the order of preference.\n *\n * @member {Array.<Function>} #positions\n */\n\n/**\n * When set, the algorithm will chose position which fits the most in the\n * limiter's bounding rect.\n *\n * @member {HTMLElement|Range|ClientRect|Rect|Function} #limiter\n */\n\n/**\n * When set, the algorithm will chose such a position which fits `element`\n * the most inside visible viewport.\n *\n * @member {Boolean} #fitInViewport\n */\n\n/**\n * An object describing a position in `position: absolute` coordinate\n * system, along with position name.\n *\n * @typedef {Object} module:utils/dom/position~Position\n *\n * @property {Number} top Top position offset.\n * @property {Number} left Left position offset.\n * @property {String} name Name of the position.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getpositionedancestor\n */\n\nimport global from './global';\n\n/**\n * For a given element, returns the nearest ancestor element which CSS position is not \"static\".\n *\n * @param {HTMLElement} element The native DOM element to be checked.\n * @returns {HTMLElement|null}\n */\nexport default function getPositionedAncestor( element ) {\n\twhile ( element && element.tagName.toLowerCase() != 'html' ) {\n\t\tif ( global.window.getComputedStyle( element ).position != 'static' ) {\n\t\t\treturn element;\n\t\t}\n\n\t\telement = element.parentElement;\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/dropdownview\n */\n\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\nimport '../../theme/components/dropdown/dropdown.css';\n\nimport { getOptimalPosition } from '@ckeditor/ckeditor5-utils/src/dom/position';\n\n/**\n * The dropdown view class. It manages the dropdown button and dropdown panel.\n *\n * In most cases, the easiest way to create a dropdown is by using the {@link module:ui/dropdown/utils~createDropdown}\n * util:\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\tdropdown.panelView.element.textContent = 'Content of the panel';\n *\n *\t\t// Will render a dropdown with a panel containing a \"Content of the panel\" text.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * If you want to add a richer content to the dropdown panel, you can use the {@link module:ui/dropdown/utils~addListToDropdown}\n * and {@link module:ui/dropdown/utils~addToolbarToDropdown} helpers. See more examples in\n * {@link module:ui/dropdown/utils~createDropdown} documentation.\n *\n * If you want to create a completely custom dropdown, then you can compose it manually:\n *\n *\t\tconst button = new DropdownButtonView( locale );\n *\t\tconst panel = new DropdownPanelView( locale );\n *\t\tconst dropdown = new DropdownView( locale, button, panel );\n *\n *\t\tbutton.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\tpanel.element.textContent = 'Content of the panel';\n *\n *\t\t// Will render a dropdown with a panel containing a \"Content of the panel\" text.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * However, dropdown created this way will contain little behavior. You will need to implement handlers for actions\n * such as {@link module:ui/bindings/clickoutsidehandler~clickOutsideHandler clicking outside an open dropdown}\n * (which should close it) and support for arrow keys inside the panel. Therefore, unless you really know what\n * you do and you really need to do it, it is recommended to use the {@link module:ui/dropdown/utils~createDropdown} helper.\n *\n * @extends module:ui/view~View\n */\nexport default class DropdownView extends View {\n\t/**\n\t * Creates an instance of the dropdown.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t * @param {module:ui/dropdown/button/dropdownbutton~DropdownButton} buttonView\n\t * @param {module:ui/dropdown/dropdownpanelview~DropdownPanelView} panelView\n\t */\n\tconstructor( locale, buttonView, panelView ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Button of the dropdown view. Clicking the button opens the {@link #panelView}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/button/buttonview~ButtonView} #buttonView\n\t\t */\n\t\tthis.buttonView = buttonView;\n\n\t\t/**\n\t\t * Panel of the dropdown. It opens when the {@link #buttonView} is\n\t\t * {@link module:ui/button/buttonview~ButtonView#event:execute executed} (i.e. clicked).\n\t\t *\n\t\t * Child views can be added to the panel's `children` collection:\n\t\t *\n\t\t *\t\tdropdown.panelView.children.add( childView );\n\t\t *\n\t\t * See {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView#children} and\n\t\t * {@link module:ui/viewcollection~ViewCollection#add}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/dropdown/dropdownpanelview~DropdownPanelView} #panelView\n\t\t */\n\t\tthis.panelView = panelView;\n\n\t\t/**\n\t\t * Controls whether the dropdown view is open, i.e. shows or hides the {@link #panelView panel}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isOpen\n\t\t */\n\t\tthis.set( 'isOpen', false );\n\n\t\t/**\n\t\t * Controls whether the dropdown is enabled, i.e. it can be clicked and execute an action.\n\t\t *\n\t\t * See {@link module:ui/button/buttonview~ButtonView#isEnabled}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', true );\n\n\t\t/**\n\t\t * (Optional) The additional CSS class set on the dropdown {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n\t\tthis.set( 'class' );\n\n\t\t/**\n\t\t * The position of the panel, relative to the dropdown.\n\t\t *\n\t\t * **Note**: When `'auto'`, the panel will use one of the remaining positions to stay\n\t\t * in the viewport, visible to the user. The positions correspond directly to\n\t\t * {@link module:ui/dropdown/dropdownview~DropdownView.defaultPanelPositions default panel positions}.\n\t\t *\n\t\t * **Note**: This value has an impact on the\n\t\t * {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView#position} property\n\t\t * each time the panel becomes {@link #isOpen open}.\n\t\t *\n\t\t * @observable\n\t\t * @default 'auto'\n\t\t * @member {'auto'|'se'|'sw'|'ne'|'nw'} #panelPosition\n\t\t */\n\t\tthis.set( 'panelPosition', 'auto' );\n\n\t\t/**\n\t\t * Tracks information about DOM focus in the dropdown.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}. It manages\n\t\t * keystrokes of the dropdown:\n\t\t *\n\t\t * * <kbd>▼</kbd> opens the dropdown,\n\t\t * * <kbd>◀</kbd> and <kbd>Esc</kbd> closes the dropdown.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new KeystrokeHandler();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-dropdown',\n\t\t\t\t\tbind.to( 'class' ),\n\t\t\t\t\tbind.if( 'isEnabled', 'ck-disabled', value => !value )\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\tbuttonView,\n\t\t\t\tpanelView\n\t\t\t]\n\t\t} );\n\n\t\tbuttonView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-dropdown__button',\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * A child {@link module:ui/list/listview~ListView list view} of the dropdown located\n\t\t * in its {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addListToDropdown}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/list/listview~ListView} #listView\n\t\t */\n\n\t\t/**\n\t\t * A child toolbar of the dropdown located in the\n\t\t * {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addToolbarToDropdown}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarView} #toolbarView\n\t\t */\n\n\t\t/**\n\t\t * Fired when the toolbar button or list item is executed.\n\t\t *\n\t\t * For {@link #listView} It fires when a child of some {@link module:ui/list/listitemview~ListItemView}\n\t\t * fired `execute`.\n\t\t *\n\t\t * For {@link #toolbarView} It fires when one of the buttons has been\n\t\t * {@link module:ui/button/buttonview~ButtonView#event:execute executed}.\n\t\t *\n\t\t * **Note**: Only supported when dropdown has list view added using {@link module:ui/dropdown/utils~addListToDropdown}\n\t\t * or {@link module:ui/dropdown/utils~addToolbarToDropdown}.\n\t\t *\n\t\t * @event execute\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Toggle the dropdown when its button has been clicked.\n\t\tthis.listenTo( this.buttonView, 'open', () => {\n\t\t\tthis.isOpen = !this.isOpen;\n\t\t} );\n\n\t\t// Toggle the visibility of the panel when the dropdown becomes open.\n\t\tthis.panelView.bind( 'isVisible' ).to( this, 'isOpen' );\n\n\t\t// Let the dropdown control the position of the panel. The position must\n\t\t// be updated every time the dropdown is open.\n\t\tthis.on( 'change:isOpen', () => {\n\t\t\tif ( !this.isOpen ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If \"auto\", find the best position of the panel to fit into the viewport.\n\t\t\t// Otherwise, simply assign the static position.\n\t\t\tif ( this.panelPosition === 'auto' ) {\n\t\t\t\tthis.panelView.position = DropdownView._getOptimalPosition( {\n\t\t\t\t\telement: this.panelView.element,\n\t\t\t\t\ttarget: this.buttonView.element,\n\t\t\t\t\tfitInViewport: true,\n\t\t\t\t\tpositions: this._panelPositions\n\t\t\t\t} ).name;\n\t\t\t} else {\n\t\t\t\tthis.panelView.position = this.panelPosition;\n\t\t\t}\n\t\t} );\n\n\t\t// Listen for keystrokes coming from within #element.\n\t\tthis.keystrokes.listenTo( this.element );\n\n\t\t// Register #element in the focus tracker.\n\t\tthis.focusTracker.add( this.element );\n\n\t\tconst closeDropdown = ( data, cancel ) => {\n\t\t\tif ( this.isOpen ) {\n\t\t\t\tthis.buttonView.focus();\n\t\t\t\tthis.isOpen = false;\n\t\t\t\tcancel();\n\t\t\t}\n\t\t};\n\n\t\t// Open the dropdown panel using the arrow down key, just like with return or space.\n\t\tthis.keystrokes.set( 'arrowdown', ( data, cancel ) => {\n\t\t\t// Don't open if the dropdown is disabled or already open.\n\t\t\tif ( this.buttonView.isEnabled && !this.isOpen ) {\n\t\t\t\tthis.isOpen = true;\n\t\t\t\tcancel();\n\t\t\t}\n\t\t} );\n\n\t\t// Block the right arrow key (until nested dropdowns are implemented).\n\t\tthis.keystrokes.set( 'arrowright', ( data, cancel ) => {\n\t\t\tif ( this.isOpen ) {\n\t\t\t\tcancel();\n\t\t\t}\n\t\t} );\n\n\t\t// Close the dropdown using the arrow left/escape key.\n\t\tthis.keystrokes.set( 'arrowleft', closeDropdown );\n\t\tthis.keystrokes.set( 'esc', closeDropdown );\n\t}\n\n\t/**\n\t * Focuses the {@link #buttonView}.\n\t */\n\tfocus() {\n\t\tthis.buttonView.focus();\n\t}\n\n\t/**\n\t * Returns {@link #panelView panel} positions to be used by the\n\t * {@link module:utils/dom/position~getOptimalPosition `getOptimalPosition()`}\n\t * utility considering the direction of the language the UI of the editor is displayed in.\n\t *\n\t * @type {module:utils/dom/position~Options#positions}\n\t * @private\n\t */\n\tget _panelPositions() {\n\t\tconst { southEast, southWest, northEast, northWest } = DropdownView.defaultPanelPositions;\n\n\t\tif ( this.locale.uiLanguageDirection === 'ltr' ) {\n\t\t\treturn [ southEast, southWest, northEast, northWest ];\n\t\t} else {\n\t\t\treturn [ southWest, southEast, northWest, northEast ];\n\t\t}\n\t}\n}\n\n/**\n * A set of positioning functions used by the dropdown view to determine\n * the optimal position (i.e. fitting into the browser viewport) of its\n * {@link module:ui/dropdown/dropdownview~DropdownView#panelView panel} when\n * {@link module:ui/dropdown/dropdownview~DropdownView#panelPosition} is set to 'auto'`.\n *\n * The available positioning functions are as follow:\n *\n * **South**\n *\n * * `southEast`\n *\n *\t\t[ Button ]\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\n * * `southWest`\n *\n *\t\t [ Button ]\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\n * **North**\n *\n * * `northEast`\n *\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\t\t[ Button ]\n *\n * * `northWest`\n *\n *\t\t+-----------------+\n *\t\t| Panel |\n *\t\t+-----------------+\n *\t\t [ Button ]\n *\n * Positioning functions are compatible with {@link module:utils/dom/position~Position}.\n *\n * The name that position function returns will be reflected in dropdown panel's class that\n * controls its placement. See {@link module:ui/dropdown/dropdownview~DropdownView#panelPosition}\n * to learn more.\n *\n * @member {Object} module:ui/dropdown/dropdownview~DropdownView.defaultPanelPositions\n */\nDropdownView.defaultPanelPositions = {\n\tsouthEast: buttonRect => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom,\n\t\t\tleft: buttonRect.left,\n\t\t\tname: 'se'\n\t\t};\n\t},\n\tsouthWest: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom,\n\t\t\tleft: buttonRect.left - panelRect.width + buttonRect.width,\n\t\t\tname: 'sw'\n\t\t};\n\t},\n\tnorthEast: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.top - panelRect.height,\n\t\t\tleft: buttonRect.left,\n\t\t\tname: 'ne'\n\t\t};\n\t},\n\tnorthWest: ( buttonRect, panelRect ) => {\n\t\treturn {\n\t\t\ttop: buttonRect.bottom - panelRect.height,\n\t\t\tleft: buttonRect.left - panelRect.width + buttonRect.width,\n\t\t\tname: 'nw'\n\t\t};\n\t}\n};\n\n/**\n * A function used to calculate the optimal position for the dropdown panel.\n *\n * @protected\n * @member {Function} module:ui/dropdown/dropdownview~DropdownView._getOptimalPosition\n */\nDropdownView._getOptimalPosition = getOptimalPosition;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* global DOMParser */\n\n/**\n * @module ui/icon/iconview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/icon/icon.css';\n\n/**\n * The icon view class.\n *\n * @extends module:ui/view~View\n */\nexport default class IconView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor() {\n\t\tsuper();\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * The SVG source of the icon.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #content\n\t\t */\n\t\tthis.set( 'content', '' );\n\n\t\t/**\n\t\t * This attribute specifies the boundaries to which the\n\t\t * icon content should stretch.\n\t\t *\n\t\t * @observable\n\t\t * @default '0 0 20 20'\n\t\t * @member {String} #viewBox\n\t\t */\n\t\tthis.set( 'viewBox', '0 0 20 20' );\n\n\t\t/**\n\t\t * The fill color of the child `path.ck-icon__fill`.\n\t\t *\n\t\t * @observable\n\t\t * @default ''\n\t\t * @member {String} #fillColor\n\t\t */\n\t\tthis.set( 'fillColor', '' );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'svg',\n\t\t\tns: 'http://www.w3.org/2000/svg',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-icon'\n\t\t\t\t],\n\t\t\t\tviewBox: bind.to( 'viewBox' )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis._updateXMLContent();\n\t\tthis._colorFillPaths();\n\n\t\t// This is a hack for lack of innerHTML binding.\n\t\t// See: https://github.com/ckeditor/ckeditor5-ui/issues/99.\n\t\tthis.on( 'change:content', () => {\n\t\t\tthis._updateXMLContent();\n\t\t\tthis._colorFillPaths();\n\t\t} );\n\n\t\tthis.on( 'change:fillColor', () => {\n\t\t\tthis._colorFillPaths();\n\t\t} );\n\t}\n\n\t/**\n\t * Updates the {@link #element} with the value of {@link #content}.\n\t *\n\t * @private\n\t */\n\t_updateXMLContent() {\n\t\tif ( this.content ) {\n\t\t\tconst parsed = new DOMParser().parseFromString( this.content.trim(), 'image/svg+xml' );\n\t\t\tconst svg = parsed.querySelector( 'svg' );\n\t\t\tconst viewBox = svg.getAttribute( 'viewBox' );\n\n\t\t\tif ( viewBox ) {\n\t\t\t\tthis.viewBox = viewBox;\n\t\t\t}\n\n\t\t\tthis.element.innerHTML = '';\n\n\t\t\twhile ( svg.childNodes.length > 0 ) {\n\t\t\t\tthis.element.appendChild( svg.childNodes[ 0 ] );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Fills all child `path.ck-icon__fill` with the `#fillColor`.\n\t *\n\t * @private\n\t */\n\t_colorFillPaths() {\n\t\tif ( this.fillColor ) {\n\t\t\tthis.element.querySelectorAll( '.ck-icon__fill' ).forEach( path => {\n\t\t\t\tpath.style.fill = this.fillColor;\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/tooltip/tooltipview\n */\n\nimport View from '../view';\n\nimport '../../theme/components/tooltip/tooltip.css';\n\n/**\n * The tooltip view class.\n *\n * @extends module:ui/view~View\n */\nexport default class TooltipView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The text of the tooltip visible to the user.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #text\n\t\t */\n\t\tthis.set( 'text', '' );\n\n\t\t/**\n\t\t * The position of the tooltip (south or north).\n\t\t *\n\t\t *\t\t+-----------+\n\t\t *\t\t| north |\n\t\t *\t\t+-----------+\n\t\t *\t\t V\n\t\t *\t\t [element]\n\t\t *\n\t\t *\t\t [element]\n\t\t *\t\t ^\n\t\t *\t\t+-----------+\n\t\t *\t\t| south |\n\t\t *\t\t+-----------+\n\t\t *\n\t\t * @observable\n\t\t * @default 's'\n\t\t * @member {'s'|'n'} #position\n\t\t */\n\t\tthis.set( 'position', 's' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-tooltip',\n\t\t\t\t\tbind.to( 'position', position => 'ck-tooltip_' + position ),\n\t\t\t\t\tbind.if( 'text', 'ck-hidden', value => !value.trim() )\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'span',\n\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [\n\t\t\t\t\t\t\t'ck',\n\t\t\t\t\t\t\t'ck-tooltip__text'\n\t\t\t\t\t\t]\n\t\t\t\t\t},\n\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttext: bind.to( 'text' ),\n\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/button/buttonview\n */\n\nimport View from '../view';\nimport IconView from '../icon/iconview';\nimport TooltipView from '../tooltip/tooltipview';\n\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\nimport { getEnvKeystrokeText } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\nimport '../../theme/components/button/button.css';\n\n/**\n * The button view class.\n *\n *\t\tconst view = new ButtonView();\n *\n *\t\tview.set( {\n *\t\t\tlabel: 'A button',\n *\t\t\tkeystroke: 'Ctrl+B',\n *\t\t\ttooltip: true,\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * @extends module:ui/view~View\n * @implements module:ui/button/button~Button\n */\nexport default class ButtonView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\t\tconst ariaLabelUid = uid();\n\n\t\t// Implement the Button interface.\n\t\tthis.set( 'class' );\n\t\tthis.set( 'labelStyle' );\n\t\tthis.set( 'icon' );\n\t\tthis.set( 'isEnabled', true );\n\t\tthis.set( 'isOn', false );\n\t\tthis.set( 'isVisible', true );\n\t\tthis.set( 'isToggleable', false );\n\t\tthis.set( 'keystroke' );\n\t\tthis.set( 'label' );\n\t\tthis.set( 'tabindex', -1 );\n\t\tthis.set( 'tooltip' );\n\t\tthis.set( 'tooltipPosition', 's' );\n\t\tthis.set( 'type', 'button' );\n\t\tthis.set( 'withText', false );\n\t\tthis.set( 'withKeystroke', false );\n\n\t\t/**\n\t\t * Collection of the child views inside of the button {@link #element}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\t/**\n\t\t * Tooltip of the button view. It is configurable using the {@link #tooltip tooltip attribute}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/tooltip/tooltipview~TooltipView} #tooltipView\n\t\t */\n\t\tthis.tooltipView = this._createTooltipView();\n\n\t\t/**\n\t\t * Label of the button view. It is configurable using the {@link #label label attribute}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #labelView\n\t\t */\n\t\tthis.labelView = this._createLabelView( ariaLabelUid );\n\n\t\t/**\n\t\t * The icon view of the button. Will be added to {@link #children} when the\n\t\t * {@link #icon icon attribute} is defined.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/icon/iconview~IconView} #iconView\n\t\t */\n\t\tthis.iconView = new IconView();\n\n\t\tthis.iconView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-button__icon'\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * A view displaying the keystroke of the button next to the {@link #labelView label}.\n\t\t * Added to {@link #children} when the {@link #withKeystroke `withKeystroke` attribute}\n\t\t * is defined.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view/view~View} #keystrokeView\n\t\t */\n\t\tthis.keystrokeView = this._createKeystrokeView();\n\n\t\t/**\n\t\t * Tooltip of the button bound to the template.\n\t\t *\n\t\t * @see #tooltip\n\t\t * @see #_getTooltipString\n\t\t * @private\n\t\t * @observable\n\t\t * @member {Boolean} #_tooltipString\n\t\t */\n\t\tthis.bind( '_tooltipString' ).to(\n\t\t\tthis, 'tooltip',\n\t\t\tthis, 'label',\n\t\t\tthis, 'keystroke',\n\t\t\tthis._getTooltipString.bind( this )\n\t\t);\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'button',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button',\n\t\t\t\t\tbind.to( 'class' ),\n\t\t\t\t\tbind.if( 'isEnabled', 'ck-disabled', value => !value ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-hidden', value => !value ),\n\t\t\t\t\tbind.to( 'isOn', value => value ? 'ck-on' : 'ck-off' ),\n\t\t\t\t\tbind.if( 'withText', 'ck-button_with-text' ),\n\t\t\t\t\tbind.if( 'withKeystroke', 'ck-button_with-keystroke' ),\n\t\t\t\t],\n\t\t\t\ttype: bind.to( 'type', value => value ? value : 'button' ),\n\t\t\t\ttabindex: bind.to( 'tabindex' ),\n\t\t\t\t'aria-labelledby': `ck-editor__aria-label_${ ariaLabelUid }`,\n\t\t\t\t'aria-disabled': bind.if( 'isEnabled', true, value => !value ),\n\t\t\t\t'aria-pressed': bind.to( 'isOn', value => this.isToggleable ? String( value ) : false )\n\t\t\t},\n\n\t\t\tchildren: this.children,\n\n\t\t\ton: {\n\t\t\t\tmousedown: bind.to( evt => {\n\t\t\t\t\tevt.preventDefault();\n\t\t\t\t} ),\n\n\t\t\t\tclick: bind.to( evt => {\n\t\t\t\t\t// We can't make the button disabled using the disabled attribute, because it won't be focusable.\n\t\t\t\t\t// Though, shouldn't this condition be moved to the button controller?\n\t\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\t\tthis.fire( 'execute' );\n\t\t\t\t\t} else {\n\t\t\t\t\t\t// Prevent the default when button is disabled, to block e.g.\n\t\t\t\t\t\t// automatic form submitting. See ckeditor/ckeditor5-link#74.\n\t\t\t\t\t\tevt.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tif ( this.icon ) {\n\t\t\tthis.iconView.bind( 'content' ).to( this, 'icon' );\n\t\t\tthis.children.add( this.iconView );\n\t\t}\n\n\t\tthis.children.add( this.tooltipView );\n\t\tthis.children.add( this.labelView );\n\n\t\tif ( this.withKeystroke ) {\n\t\t\tthis.children.add( this.keystrokeView );\n\t\t}\n\t}\n\n\t/**\n\t * Focuses the {@link #element} of the button.\n\t */\n\tfocus() {\n\t\tthis.element.focus();\n\t}\n\n\t/**\n\t * Creates a {@link module:ui/tooltip/tooltipview~TooltipView} instance and binds it with button\n\t * attributes.\n\t *\n\t * @private\n\t * @returns {module:ui/tooltip/tooltipview~TooltipView}\n\t */\n\t_createTooltipView() {\n\t\tconst tooltipView = new TooltipView();\n\n\t\ttooltipView.bind( 'text' ).to( this, '_tooltipString' );\n\t\ttooltipView.bind( 'position' ).to( this, 'tooltipPosition' );\n\n\t\treturn tooltipView;\n\t}\n\n\t/**\n\t * Creates a label view instance and binds it with button attributes.\n\t *\n\t * @private\n\t * @param {String} ariaLabelUid The aria label UID.\n\t * @returns {module:ui/view~View}\n\t */\n\t_createLabelView( ariaLabelUid ) {\n\t\tconst labelView = new View();\n\t\tconst bind = this.bindTemplate;\n\n\t\tlabelView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__label'\n\t\t\t\t],\n\t\t\t\tstyle: bind.to( 'labelStyle' ),\n\t\t\t\tid: `ck-editor__aria-label_${ ariaLabelUid }`,\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: this.bindTemplate.to( 'label' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn labelView;\n\t}\n\n\t/**\n\t * Creates a view that displays a keystroke next to a {@link #labelView label }\n\t * and binds it with button attributes.\n\t *\n\t * @private\n\t * @returns {module:ui/view~View}\n\t */\n\t_createKeystrokeView() {\n\t\tconst keystrokeView = new View();\n\n\t\tkeystrokeView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__keystroke'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: this.bindTemplate.to( 'keystroke', text => getEnvKeystrokeText( text ) )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn keystrokeView;\n\t}\n\n\t/**\n\t * Gets the text for the {@link #tooltipView} from the combination of\n\t * {@link #tooltip}, {@link #label} and {@link #keystroke} attributes.\n\t *\n\t * @private\n\t * @see #tooltip\n\t * @see #_tooltipString\n\t * @param {Boolean|String|Function} tooltip Button tooltip.\n\t * @param {String} label Button label.\n\t * @param {String} keystroke Button keystroke.\n\t * @returns {String}\n\t */\n\t_getTooltipString( tooltip, label, keystroke ) {\n\t\tif ( tooltip ) {\n\t\t\tif ( typeof tooltip == 'string' ) {\n\t\t\t\treturn tooltip;\n\t\t\t} else {\n\t\t\t\tif ( keystroke ) {\n\t\t\t\t\tkeystroke = getEnvKeystrokeText( keystroke );\n\t\t\t\t}\n\n\t\t\t\tif ( tooltip instanceof Function ) {\n\t\t\t\t\treturn tooltip( label, keystroke );\n\t\t\t\t} else {\n\t\t\t\t\treturn `${ label }${ keystroke ? ` (${ keystroke })` : '' }`;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn '';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/dropdown/button/dropdownbuttonview\n */\n\nimport ButtonView from '../../button/buttonview';\n\nimport dropdownArrowIcon from '../../../theme/icons/dropdown-arrow.svg';\nimport IconView from '../../icon/iconview';\n\n/**\n * The default dropdown button view class.\n *\n *\t\tconst view = new DropdownButtonView();\n *\n *\t\tview.set( {\n *\t\t\tlabel: 'A button',\n *\t\t\tkeystroke: 'Ctrl+B',\n *\t\t\ttooltip: true\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * Also see the {@link module:ui/dropdown/utils~createDropdown `createDropdown()` util}.\n *\n * @implements module:ui/dropdown/button/dropdownbutton~DropdownButton\n * @extends module:ui/button/buttonview~ButtonView\n */\nexport default class DropdownButtonView extends ButtonView {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * An icon that displays arrow to indicate a dropdown button.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/icon/iconview~IconView}\n\t\t */\n\t\tthis.arrowView = this._createArrowView();\n\n\t\tthis.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\t'aria-haspopup': true\n\t\t\t}\n\t\t} );\n\n\t\t// The DropdownButton interface expects the open event upon which will open the dropdown.\n\t\tthis.delegate( 'execute' ).to( this, 'open' );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis.children.add( this.arrowView );\n\t}\n\n\t/**\n\t * Creates a {@link module:ui/icon/iconview~IconView} instance as {@link #arrowView}.\n\t *\n\t * @private\n\t * @returns {module:ui/icon/iconview~IconView}\n\t */\n\t_createArrowView() {\n\t\tconst arrowView = new IconView();\n\n\t\tarrowView.content = dropdownArrowIcon;\n\n\t\tarrowView.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-dropdown__arrow'\n\t\t\t}\n\t\t} );\n\n\t\treturn arrowView;\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 10 10\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M.941 4.523a.75.75 0 1 1 1.06-1.06l3.006 3.005 3.005-3.005a.75.75 0 1 1 1.06 1.06l-3.549 3.55a.75.75 0 0 1-1.168-.136L.941 4.523z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listview\n */\n\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '../focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\n\nimport '../../theme/components/list/list.css';\n\n/**\n * The list view class.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class ListView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor() {\n\t\tsuper();\n\n\t\t/**\n\t\t * Collection of the child list views.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.items = this.createCollection();\n\n\t\t/**\n\t\t * Tracks information about DOM focus in the list.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n\t\tthis.focusTracker = new FocusTracker();\n\n\t\t/**\n\t\t * Instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n\t\tthis.keystrokes = new KeystrokeHandler();\n\n\t\t/**\n\t\t * Helps cycling over focusable {@link #items} in the list.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n\t\tthis._focusCycler = new FocusCycler( {\n\t\t\tfocusables: this.items,\n\t\t\tfocusTracker: this.focusTracker,\n\t\t\tkeystrokeHandler: this.keystrokes,\n\t\t\tactions: {\n\t\t\t\t// Navigate list items backwards using the arrowup key.\n\t\t\t\tfocusPrevious: 'arrowup',\n\n\t\t\t\t// Navigate toolbar items forwards using the arrowdown key.\n\t\t\t\tfocusNext: 'arrowdown',\n\t\t\t}\n\t\t} );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'ul',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-reset',\n\t\t\t\t\t'ck-list'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.items\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Items added before rendering should be known to the #focusTracker.\n\t\tfor ( const item of this.items ) {\n\t\t\tthis.focusTracker.add( item.element );\n\t\t}\n\n\t\tthis.items.on( 'add', ( evt, item ) => {\n\t\t\tthis.focusTracker.add( item.element );\n\t\t} );\n\n\t\tthis.items.on( 'remove', ( evt, item ) => {\n\t\t\tthis.focusTracker.remove( item.element );\n\t\t} );\n\n\t\t// Start listening for the keystrokes coming from #element.\n\t\tthis.keystrokes.listenTo( this.element );\n\t}\n\n\t/**\n\t * Focuses the first focusable in {@link #items}.\n\t */\n\tfocus() {\n\t\tthis._focusCycler.focusFirst();\n\t}\n\n\t/**\n\t * Focuses the last focusable in {@link #items}.\n\t */\n\tfocusLast() {\n\t\tthis._focusCycler.focusLast();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listitemview\n */\n\nimport View from '../view';\n\n/**\n * The list item view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ListItemView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Collection of the child views inside of the list item {@link #element}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.children = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'li',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-list__item'\n\t\t\t\t]\n\t\t\t},\n\n\t\t\tchildren: this.children\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the list item.\n\t */\n\tfocus() {\n\t\tthis.children.first.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/list/listseparatorview\n */\n\nimport View from '../view';\n\n/**\n * The list separator view class.\n *\n * @extends module:ui/view~View\n */\nexport default class ListSeparatorView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'li',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-list__separator'\n\t\t\t\t]\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/button/switchbuttonview\n */\n\nimport View from '../view';\nimport ButtonView from './buttonview';\n\nimport '../../theme/components/button/switchbutton.css';\n\n/**\n * The switch button view class.\n *\n *\t\tconst view = new SwitchButtonView();\n *\n *\t\tview.set( {\n *\t\t\twithText: true,\n *\t\t\tlabel: 'Switch me!'\n *\t\t} );\n *\n *\t\tview.render();\n *\n *\t\tdocument.body.append( view.element );\n *\n * @extends module:ui/button/buttonview~ButtonView\n */\nexport default class SwitchButtonView extends ButtonView {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tthis.isToggleable = true;\n\n\t\t/**\n\t\t * The toggle switch of the button.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/view~View} #toggleSwitchView\n\t\t */\n\t\tthis.toggleSwitchView = this._createToggleView();\n\n\t\tthis.extendTemplate( {\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-switchbutton'\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tthis.children.add( this.toggleSwitchView );\n\t}\n\n\t/**\n\t * Creates a toggle child view.\n\t *\n\t * @private\n\t * @returns {module:ui/view~View}\n\t */\n\t_createToggleView() {\n\t\tconst toggleSwitchView = new View();\n\n\t\ttoggleSwitchView.setTemplate( {\n\t\t\ttag: 'span',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-button__toggle'\n\t\t\t\t],\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'span',\n\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [\n\t\t\t\t\t\t\t'ck',\n\t\t\t\t\t\t\t'ck-button__toggle__inner'\n\t\t\t\t\t\t],\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn toggleSwitchView;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/clickoutsidehandler\n */\n\n/* global document */\n\n/**\n * Handles clicking **outside** of a specified set of elements, then fires an action.\n *\n * **Note**: Actually, the action is executed upon `mousedown`, not `click`. It prevents\n * certain issues when the user keeps holding the mouse button and the UI cannot react\n * properly.\n *\n * @param {Object} options Configuration options.\n * @param {module:utils/dom/emittermixin~Emitter} options.emitter The emitter to which this behavior\n * should be added.\n * @param {Function} options.activator Function returning a `Boolean`, to determine whether the handler is active.\n * @param {Array.<HTMLElement>} options.contextElements HTML elements that determine the scope of the\n * handler. Clicking any of them or their descendants will **not** fire the callback.\n * @param {Function} options.callback An action executed by the handler.\n */\nexport default function clickOutsideHandler( { emitter, activator, callback, contextElements } ) {\n\temitter.listenTo( document, 'mousedown', ( evt, { target } ) => {\n\t\tif ( !activator() ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const contextElement of contextElements ) {\n\t\t\tif ( contextElement.contains( target ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tcallback();\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/dropdown/utils\n */\nimport DropdownPanelView from './dropdownpanelview';\nimport DropdownView from './dropdownview';\nimport DropdownButtonView from './button/dropdownbuttonview';\nimport ToolbarView from '../toolbar/toolbarview';\nimport ListView from '../list/listview';\nimport ListItemView from '../list/listitemview';\nimport ListSeparatorView from '../list/listseparatorview';\nimport ButtonView from '../button/buttonview';\nimport SwitchButtonView from '../button/switchbuttonview';\nimport clickOutsideHandler from '../bindings/clickoutsidehandler';\nimport '../../theme/components/dropdown/toolbardropdown.css';\nimport '../../theme/components/dropdown/listdropdown.css';\n/**\n * A helper for creating dropdowns. It creates an instance of a {@link module:ui/dropdown/dropdownview~DropdownView dropdown},\n * with a {@link module:ui/dropdown/button/dropdownbutton~DropdownButton button},\n * {@link module:ui/dropdown/dropdownpanelview~DropdownPanelView panel} and all standard dropdown's behaviors.\n *\n * # Creating dropdowns\n *\n * By default, the default {@link module:ui/dropdown/button/dropdownbuttonview~DropdownButtonView} class is used as\n * definition of the button:\n *\n *\t\tconst dropdown = createDropdown( model );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\t// Will render a dropdown labeled \"A dropdown\" with an empty panel.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * You can also provide other button views (they need to implement the\n * {@link module:ui/dropdown/button/dropdownbutton~DropdownButton} interface). For instance, you can use\n * {@link module:ui/dropdown/button/splitbuttonview~SplitButtonView} to create a dropdown with a split button.\n *\n *\t\tconst dropdown = createDropdown( model, SplitButtonView );\n *\n *\t\t// Configure dropdown's button properties:\n *\t\tdropdown.buttonView.set( {\n *\t\t\tlabel: 'A dropdown',\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tdropdown.buttonView.on( 'execute', () => {\n *\t\t\t// Add the behavior of the \"action part\" of the split button.\n *\t\t\t// Split button consists of the \"action part\" and \"arrow part\".\n *\t\t\t// The arrow opens the dropdown while the action part can have some other behavior.\n * \t\t} );\n *\n *\t\tdropdown.render();\n *\n *\t\t// Will render a dropdown labeled \"A dropdown\" with an empty panel.\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * # Adding content to the dropdown's panel\n *\n * The content of the panel can be inserted directly into the `dropdown.panelView.element`:\n *\n *\t\tdropdown.panelView.element.textContent = 'Content of the panel';\n *\n * However, most of the time you will want to add there either a {@link module:ui/list/listview~ListView list of options}\n * or a list of buttons (i.e. a {@link module:ui/toolbar/toolbarview~ToolbarView toolbar}).\n * To simplify the task, you can use, respectively, {@link module:ui/dropdown/utils~addListToDropdown} or\n * {@link module:ui/dropdown/utils~addToolbarToDropdown} utils.\n *\n * @param {module:utils/locale~Locale} locale The locale instance.\n * @param {Function} ButtonClass The dropdown button view class. Needs to implement the\n * {@link module:ui/dropdown/button/dropdownbutton~DropdownButton} interface.\n * @returns {module:ui/dropdown/dropdownview~DropdownView} The dropdown view instance.\n */\nexport function createDropdown(locale, ButtonClass = DropdownButtonView) {\n const buttonView = new ButtonClass(locale);\n const panelView = new DropdownPanelView(locale);\n const dropdownView = new DropdownView(locale, buttonView, panelView);\n buttonView.bind('isEnabled').to(dropdownView);\n if (buttonView instanceof DropdownButtonView) {\n buttonView.bind('isOn').to(dropdownView, 'isOpen');\n } else {\n buttonView.arrowView.bind('isOn').to(dropdownView, 'isOpen');\n }\n addDefaultBehavior(dropdownView);\n return dropdownView;\n}\n/**\n * Adds an instance of {@link module:ui/toolbar/toolbarview~ToolbarView} to a dropdown.\n *\n *\t\tconst buttons = [];\n *\n *\t\t// Either create a new ButtonView instance or create existing.\n *\t\tbuttons.push( new ButtonView() );\n *\t\tbuttons.push( editor.ui.componentFactory.get( 'someButton' ) );\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\taddToolbarToDropdown( dropdown, buttons );\n *\n *\t\tdropdown.toolbarView.isVertical = true;\n *\n *\t\t// Will render a vertical button dropdown labeled \"A button dropdown\"\n *\t\t// with a button group in the panel containing two buttons.\n *\t\tdropdown.render()\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * See {@link module:ui/dropdown/utils~createDropdown} and {@link module:ui/toolbar/toolbarview~ToolbarView}.\n *\n * @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView A dropdown instance to which `ToolbarView` will be added.\n * @param {Iterable.<module:ui/button/buttonview~ButtonView>} buttons\n */\nexport function addToolbarToDropdown(dropdownView, buttons) {\n const locale = dropdownView.locale;\n const t = locale.t;\n const toolbarView = dropdownView.toolbarView = new ToolbarView(locale);\n toolbarView.set('ariaLabel', t('bm'));\n dropdownView.extendTemplate({ attributes: { class: ['ck-toolbar-dropdown'] } });\n buttons.map(view => toolbarView.items.add(view));\n dropdownView.panelView.children.add(toolbarView);\n toolbarView.items.delegate('execute').to(dropdownView);\n}\n/**\n * Adds an instance of {@link module:ui/list/listview~ListView} to a dropdown.\n *\n *\t\tconst items = new Collection();\n *\n *\t\titems.add( {\n *\t\t\ttype: 'button',\n *\t\t\tmodel: new Model( {\n *\t\t\t\twithText: true,\n *\t\t\t\tlabel: 'First item',\n *\t\t\t\tlabelStyle: 'color: red'\n *\t\t\t} )\n *\t\t} );\n *\n *\t\titems.add( {\n *\t\t\t type: 'button',\n *\t\t\t model: new Model( {\n *\t\t\t\twithText: true,\n *\t\t\t\tlabel: 'Second item',\n *\t\t\t\tlabelStyle: 'color: green',\n *\t\t\t\tclass: 'foo'\n *\t\t\t} )\n *\t\t} );\n *\n *\t\tconst dropdown = createDropdown( locale );\n *\n *\t\taddListToDropdown( dropdown, items );\n *\n *\t\t// Will render a dropdown with a list in the panel containing two items.\n *\t\tdropdown.render()\n *\t\tdocument.body.appendChild( dropdown.element );\n *\n * The `items` collection passed to this methods controls the presence and attributes of respective\n * {@link module:ui/list/listitemview~ListItemView list items}.\n *\n *\n * See {@link module:ui/dropdown/utils~createDropdown} and {@link module:list/list~List}.\n *\n * @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView A dropdown instance to which `ListVIew` will be added.\n * @param {Iterable.<module:ui/dropdown/utils~ListDropdownItemDefinition>} items\n * A collection of the list item definitions to populate the list.\n */\nexport function addListToDropdown(dropdownView, items) {\n const locale = dropdownView.locale;\n const listView = dropdownView.listView = new ListView(locale);\n listView.items.bindTo(items).using(({type, model}) => {\n if (type === 'separator') {\n return new ListSeparatorView(locale);\n } else if (type === 'button' || type === 'switchbutton') {\n const listItemView = new ListItemView(locale);\n let buttonView;\n if (type === 'button') {\n buttonView = new ButtonView(locale);\n } else {\n buttonView = new SwitchButtonView(locale);\n }\n // Bind all model properties to the button view.\n buttonView.bind(...Object.keys(model)).to(model);\n buttonView.delegate('execute').to(listItemView);\n listItemView.children.add(buttonView);\n return listItemView;\n }\n });\n dropdownView.panelView.children.add(listView);\n listView.items.delegate('execute').to(dropdownView);\n}\n// Add a set of default behaviors to dropdown view.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction addDefaultBehavior(dropdownView) {\n closeDropdownOnBlur(dropdownView);\n closeDropdownOnExecute(dropdownView);\n focusDropdownContentsOnArrows(dropdownView);\n}\n// Adds a behavior to a dropdownView that closes opened dropdown when user clicks outside the dropdown.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction closeDropdownOnBlur(dropdownView) {\n dropdownView.on('render', () => {\n clickOutsideHandler({\n emitter: dropdownView,\n activator: () => dropdownView.isOpen,\n callback: () => {\n dropdownView.isOpen = false;\n },\n contextElements: [dropdownView.element]\n });\n });\n}\n// Adds a behavior to a dropdownView that closes the dropdown view on \"execute\" event.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction closeDropdownOnExecute(dropdownView) {\n // Close the dropdown when one of the list items has been executed.\n dropdownView.on('execute', evt => {\n // Toggling a switch button view should not close the dropdown.\n if (evt.source instanceof SwitchButtonView) {\n return;\n }\n dropdownView.isOpen = false;\n });\n}\n// Adds a behavior to a dropdownView that focuses the dropdown's panel view contents on keystrokes.\n//\n// @param {module:ui/dropdown/dropdownview~DropdownView} dropdownView\nfunction focusDropdownContentsOnArrows(dropdownView) {\n // If the dropdown panel is already open, the arrow down key should focus the first child of the #panelView.\n dropdownView.keystrokes.set('arrowdown', (data, cancel) => {\n if (dropdownView.isOpen) {\n dropdownView.panelView.focus();\n cancel();\n }\n });\n // If the dropdown panel is already open, the arrow up key should focus the last child of the #panelView.\n dropdownView.keystrokes.set('arrowup', (data, cancel) => {\n if (dropdownView.isOpen) {\n dropdownView.panelView.focusLast();\n cancel();\n }\n });\n} /**\n * A definition of the list item used by the {@link module:ui/dropdown/utils~addListToDropdown}\n * utility.\n *\n * @typedef {Object} module:ui/dropdown/utils~ListDropdownItemDefinition\n *\n * @property {String} type Either `'separator'`, `'button'` or `'switchbutton'`.\n * @property {module:ui/model~Model} [model] Model of the item (when **not** `'separator'`).\n * Its properties fuel the newly created list item (or its children, depending on the `type`).\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/toolbar/toolbarview\n */\n/* globals console */\nimport View from '../view';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '../focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport ToolbarSeparatorView from './toolbarseparatorview';\nimport getResizeObserver from '@ckeditor/ckeditor5-utils/src/dom/getresizeobserver';\nimport preventDefault from '../bindings/preventdefault.js';\nimport Rect from '@ckeditor/ckeditor5-utils/src/dom/rect';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport {\n createDropdown,\n addToolbarToDropdown\n} from '../dropdown/utils';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport verticalDotsIcon from '@ckeditor/ckeditor5-core/theme/icons/three-vertical-dots.svg';\nimport '../../theme/components/toolbar/toolbar.css';\n/**\n * The toolbar view class.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class ToolbarView extends View {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~ToolbarView} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} locale The localization services instance.\n\t * @param {module:ui/toolbar/toolbarview~ToolbarOptions} [options] Configuration options of the toolbar.\n\t */\n constructor(locale, options) {\n super(locale);\n const bind = this.bindTemplate;\n const t = this.t;\n /**\n\t\t * A reference to the options object passed to the constructor.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarOptions}\n\t\t */\n this.options = options || {};\n /**\n\t\t * Label used by assistive technologies to describe this toolbar element.\n\t\t *\n\t\t * @default 'Editor toolbar'\n\t\t * @member {String} #ariaLabel\n\t\t */\n this.set('ariaLabel', t('bq'));\n /**\n\t\t * A collection of toolbar items (buttons, dropdowns, etc.).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.items = this.createCollection();\n /**\n\t\t * Tracks information about the DOM focus in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}\n\t\t * to handle keyboard navigation in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * An additional CSS class added to the {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n this.set('class');\n /**\n\t\t * A (child) view containing {@link #items toolbar items}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ItemsView}\n\t\t */\n this.itemsView = new ItemsView(locale);\n /**\n\t\t * A top–level collection aggregating building blocks of the toolbar.\n\t\t *\n\t\t *\t┌───────────────── ToolbarView ─────────────────┐\n\t\t *\t| ┌──────────────── #children ────────────────┐ |\n\t\t *\t| | ┌──────────── #itemsView ───────────┐ | |\n\t\t *\t| | | [ item1 ] [ item2 ] ... [ itemN ] | | |\n\t\t *\t| | └──────────────────────────────────-┘ | |\n\t\t *\t| └───────────────────────────────────────────┘ |\n\t\t *\t└───────────────────────────────────────────────┘\n\t\t *\n\t\t * By default, it contains the {@link #itemsView} but it can be extended with additional\n\t\t * UI elements when necessary.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this.createCollection();\n this.children.add(this.itemsView);\n /**\n\t\t * A collection of {@link #items} that take part in the focus cycling\n\t\t * (i.e. navigation using the keyboard). Usually, it contains a subset of {@link #items} with\n\t\t * some optional UI elements that also belong to the toolbar and should be focusable\n\t\t * by the user.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.focusables = this.createCollection();\n /**\n\t\t * Controls the orientation of toolbar items. Only available when\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull dynamic items grouping}\n\t\t * is **disabled**.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isVertical\n\t\t */\n /**\n\t\t * Helps cycling over {@link #focusables focusable items} in the toolbar.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this.focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate toolbar items backwards using the arrow[left,up] keys.\n focusPrevious: [\n 'arrowleft',\n 'arrowup'\n ],\n // Navigate toolbar items forwards using the arrow[right,down] keys.\n focusNext: [\n 'arrowright',\n 'arrowdown'\n ]\n }\n });\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-toolbar',\n bind.to('class')\n ],\n role: 'toolbar',\n 'aria-label': bind.to('ariaLabel')\n },\n children: this.children,\n on: {\n // https://github.com/ckeditor/ckeditor5-ui/issues/206\n mousedown: preventDefault(this)\n }\n });\n /**\n\t\t * An instance of the active toolbar behavior that shapes its look and functionality.\n\t\t *\n\t\t * See {@link module:ui/toolbar/toolbarview~ToolbarBehavior} to learn more.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarBehavior}\n\t\t */\n this._behavior = this.options.shouldGroupWhenFull ? new DynamicGrouping(this) : new StaticLayout(this);\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n // Children added before rendering should be known to the #focusTracker.\n for (const item of this.items) {\n this.focusTracker.add(item.element);\n }\n this.items.on('add', (evt, item) => {\n this.focusTracker.add(item.element);\n });\n this.items.on('remove', (evt, item) => {\n this.focusTracker.remove(item.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n this._behavior.render(this);\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n this._behavior.destroy();\n return super.destroy();\n }\n /**\n\t * Focuses the first focusable in {@link #focusables}.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Focuses the last focusable in {@link #focusables}.\n\t */\n focusLast() {\n this._focusCycler.focusLast();\n }\n /**\n\t * A utility that expands the plain toolbar configuration into\n\t * {@link module:ui/toolbar/toolbarview~ToolbarView#items} using a given component factory.\n\t *\n\t * @param {Array.<String>} config The toolbar items configuration.\n\t * @param {module:ui/componentfactory~ComponentFactory} factory A factory producing toolbar items.\n\t */\n fillFromConfig(config, factory) {\n config.map(name => {\n if (name == '|') {\n this.items.add(new ToolbarSeparatorView());\n } else if (factory.has(name)) {\n this.items.add(factory.create(name));\n } else {\n /**\n\t\t\t\t * There was a problem processing the configuration of the toolbar. The item with the given\n\t\t\t\t * name does not exist so it was omitted when rendering the toolbar.\n\t\t\t\t *\n\t\t\t\t * This warning usually shows up when the {@link module:core/plugin~Plugin} which is supposed\n\t\t\t\t * to provide a toolbar item has not been loaded or there is a typo in the configuration.\n\t\t\t\t *\n\t\t\t\t * Make sure the plugin responsible for this toolbar item is loaded and the toolbar configuration\n\t\t\t\t * is correct, e.g. {@link module:basic-styles/bold~Bold} is loaded for the `'bold'` toolbar item.\n\t\t\t\t *\n\t\t\t\t * You can use the following snippet to retrieve all available toolbar items:\n\t\t\t\t *\n\t\t\t\t *\t\tArray.from( editor.ui.componentFactory.names() );\n\t\t\t\t *\n\t\t\t\t * @error toolbarview-item-unavailable\n\t\t\t\t * @param {String} name The name of the component.\n\t\t\t\t */\n console.warn(attachLinkToDocumentation('toolbarview-item-unavailable: The requested toolbar item is unavailable.'), { name });\n }\n });\n }\n}\n/**\n * An inner block of the {@link module:ui/toolbar/toolbarview~ToolbarView} hosting its\n * {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n *\n * @private\n * @extends module:ui/view~View\n */\nclass ItemsView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n /**\n\t\t * A collection of items (buttons, dropdowns, etc.).\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this.createCollection();\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-toolbar__items'\n ]\n },\n children: this.children\n });\n }\n}\n/**\n * A toolbar behavior that makes it static and unresponsive to the changes of the environment.\n * At the same time, it also makes it possible to display a toolbar with a vertical layout\n * using the {@link module:ui/toolbar/toolbarview~ToolbarView#isVertical} property.\n *\n * @private\n * @implements module:ui/toolbar/toolbarview~ToolbarBehavior\n */\nclass StaticLayout {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~StaticLayout} toolbar\n\t * behavior.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n constructor(view) {\n const bind = view.bindTemplate;\n // Static toolbar can be vertical when needed.\n view.set('isVertical', false);\n // 1:1 pass–through binding, all ToolbarView#items are visible.\n view.itemsView.children.bindTo(view.items).using(item => item);\n // 1:1 pass–through binding, all ToolbarView#items are focusable.\n view.focusables.bindTo(view.items).using(item => item);\n view.extendTemplate({\n attributes: {\n class: [// When vertical, the toolbar has an additional CSS class.\n bind.if('isVertical', 'ck-toolbar_vertical')]\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n }\n}\n/**\n * A toolbar behavior that makes the items respond to changes in the geometry.\n *\n * In a nutshell, it groups {@link module:ui/toolbar/toolbarview~ToolbarView#items}\n * that do not fit visually into a single row of the toolbar (due to limited space).\n * Items that do not fit are aggregated in a dropdown displayed at the end of the toolbar.\n *\n *\t┌──────────────────────────────────────── ToolbarView ──────────────────────────────────────────┐\n *\t| ┌─────────────────────────────────────── #children ─────────────────────────────────────────┐ |\n *\t| | ┌─────── #itemsView ────────┐ ┌──────────────────────┐ ┌── #groupedItemsDropdown ───┐ | |\n *\t| | | #ungroupedItems | | ToolbarSeparatorView | | #groupedItems | | |\n *\t| | └──────────────────────────-┘ └──────────────────────┘ └────────────────────────────┘ | |\n *\t| | \\---------- only when toolbar items overflow --------/ | |\n *\t| └───────────────────────────────────────────────────────────────────────────────────────────┘ |\n *\t└───────────────────────────────────────────────────────────────────────────────────────────────┘\n *\n * @private\n * @implements module:ui/toolbar/toolbarview~ToolbarBehavior\n */\nclass DynamicGrouping {\n /**\n\t * Creates an instance of the {@link module:ui/toolbar/toolbarview~DynamicGrouping} toolbar\n\t * behavior.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n constructor(view) {\n /**\n\t\t * A collection of toolbar children.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.viewChildren = view.children;\n /**\n\t\t * A collection of focusable toolbar elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.viewFocusables = view.focusables;\n /**\n\t\t * A view containing toolbar items.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ItemsView}\n\t\t */\n this.viewItemsView = view.itemsView;\n /**\n\t\t * Toolbar focus tracker.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.viewFocusTracker = view.focusTracker;\n /**\n\t\t * Toolbar locale.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n this.viewLocale = view.locale;\n /**\n\t\t * Toolbar element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} #viewElement\n\t\t */\n /**\n\t\t * A subset of toolbar {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n\t\t * Aggregates items that fit into a single row of the toolbar and were not {@link #groupedItems grouped}\n\t\t * into a {@link #groupedItemsDropdown dropdown}. Items of this collection are displayed in the\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarView#itemsView}.\n\t\t *\n\t\t * When none of the {@link module:ui/toolbar/toolbarview~ToolbarView#items} were grouped, it\n\t\t * matches the {@link module:ui/toolbar/toolbarview~ToolbarView#items} collection in size and order.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.ungroupedItems = view.createCollection();\n /**\n\t\t * A subset of toolbar {@link module:ui/toolbar/toolbarview~ToolbarView#items}.\n\t\t * A collection of the toolbar items that do not fit into a single row of the toolbar.\n\t\t * Grouped items are displayed in a dedicated {@link #groupedItemsDropdown dropdown}.\n\t\t *\n\t\t * When none of the {@link module:ui/toolbar/toolbarview~ToolbarView#items} were grouped,\n\t\t * this collection is empty.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.groupedItems = view.createCollection();\n /**\n\t\t * The dropdown that aggregates {@link #groupedItems grouped items} that do not fit into a single\n\t\t * row of the toolbar. It is displayed on demand as the last of\n\t\t * {@link module:ui/toolbar/toolbarview~ToolbarView#children toolbar children} and offers another\n\t\t * (nested) toolbar which displays items that would normally overflow.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/dropdown/dropdownview~DropdownView}\n\t\t */\n this.groupedItemsDropdown = this._createGroupedItemsDropdown();\n /**\n\t\t * An instance of the resize observer that helps dynamically determine the geometry of the toolbar\n\t\t * and manage items that do not fit into a single row.\n\t\t *\n\t\t * **Note:** Created in {@link #_enableGroupingOnResize}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/dom/getresizeobserver~ResizeObserver}\n\t\t */\n this.resizeObserver = null;\n /**\n\t\t * A cached value of the horizontal padding style used by {@link #_updateGrouping}\n\t\t * to manage the {@link module:ui/toolbar/toolbarview~ToolbarView#items} that do not fit into\n\t\t * a single toolbar line. This value can be reused between updates because it is unlikely that\n\t\t * the padding will change and re–using `Window.getComputedStyle()` is expensive.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n this.cachedPadding = null;\n // Only those items that were not grouped are visible to the user.\n view.itemsView.children.bindTo(this.ungroupedItems).using(item => item);\n // Make sure all #items visible in the main space of the toolbar are \"focuscycleable\".\n this.ungroupedItems.on('add', this._updateFocusCycleableItems.bind(this));\n this.ungroupedItems.on('remove', this._updateFocusCycleableItems.bind(this));\n // Make sure the #groupedItemsDropdown is also included in cycling when it appears.\n view.children.on('add', this._updateFocusCycleableItems.bind(this));\n view.children.on('remove', this._updateFocusCycleableItems.bind(this));\n // ToolbarView#items is dynamic. When an item is added, it should be automatically\n // represented in either grouped or ungrouped items at the right index.\n // In other words #items == concat( #ungroupedItems, #groupedItems )\n // (in length and order).\n view.items.on('add', (evt, item, index) => {\n if (index > this.ungroupedItems.length) {\n this.groupedItems.add(item, index - this.ungroupedItems.length);\n } else {\n this.ungroupedItems.add(item, index);\n }\n // When a new ungrouped item joins in and lands in #ungroupedItems, there's a chance it causes\n // the toolbar to overflow.\n this._updateGrouping();\n });\n // When an item is removed from ToolbarView#items, it should be automatically\n // removed from either grouped or ungrouped items.\n view.items.on('remove', (evt, item, index) => {\n if (index > this.ungroupedItems.length) {\n this.groupedItems.remove(item);\n } else {\n this.ungroupedItems.remove(item);\n }\n // Whether removed from grouped or ungrouped items, there is a chance\n // some new space is available and we could do some ungrouping.\n this._updateGrouping();\n });\n view.extendTemplate({\n attributes: {\n class: [// To group items dynamically, the toolbar needs a dedicated CSS class.\n 'ck-toolbar_grouping']\n }\n });\n }\n /**\n\t * Enables dynamic items grouping based on the dimensions of the toolbar.\n\t *\n\t * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior\n\t * is added to.\n\t */\n render(view) {\n this.viewElement = view.element;\n this._enableGroupingOnResize();\n }\n /**\n\t * Cleans up the internals used by this behavior.\n\t */\n destroy() {\n // The dropdown may not be in ToolbarView#children at the moment of toolbar destruction\n // so let's make sure it's actually destroyed along with the toolbar.\n this.groupedItemsDropdown.destroy();\n this.resizeObserver.disconnect();\n }\n /**\n\t * When called, it will check if any of the {@link #ungroupedItems} do not fit into a single row of the toolbar,\n\t * and it will move them to the {@link #groupedItems} when it happens.\n\t *\n\t * At the same time, it will also check if there is enough space in the toolbar for the first of the\n\t * {@link #groupedItems} to be returned back to {@link #ungroupedItems} and still fit into a single row\n\t * without the toolbar wrapping.\n\t *\n\t * @protected\n\t */\n _updateGrouping() {\n // Do no grouping–related geometry analysis when the toolbar is detached from visible DOM,\n // for instance before #render(), or after render but without a parent or a parent detached\n // from DOM. DOMRects won't work anyway and there will be tons of warning in the console and\n // nothing else.\n if (!this.viewElement.ownerDocument.body.contains(this.viewElement)) {\n return;\n }\n let wereItemsGrouped;\n // Group #items as long as some wrap to the next row. This will happen, for instance,\n // when the toolbar is getting narrow and there is not enough space to display all items in\n // a single row.\n while (this._areItemsOverflowing) {\n this._groupLastItem();\n wereItemsGrouped = true;\n }\n // If none were grouped now but there were some items already grouped before,\n // then, what the hell, maybe let's see if some of them can be ungrouped. This happens when,\n // for instance, the toolbar is stretching and there's more space in it than before.\n if (!wereItemsGrouped && this.groupedItems.length) {\n // Ungroup items as long as none are overflowing or there are none to ungroup left.\n while (this.groupedItems.length && !this._areItemsOverflowing) {\n this._ungroupFirstItem();\n }\n // If the ungrouping ended up with some item wrapping to the next row,\n // put it back to the group toolbar (\"undo the last ungroup\"). We don't know whether\n // an item will wrap or not until we ungroup it (that's a DOM/CSS thing) so this\n // clean–up is vital for the algorithm.\n if (this._areItemsOverflowing) {\n this._groupLastItem();\n }\n }\n }\n /**\n\t * Returns `true` when {@link module:ui/toolbar/toolbarview~ToolbarView#element} children visually overflow,\n\t * for instance if the toolbar is narrower than its members. Returns `false` otherwise.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _areItemsOverflowing() {\n // An empty toolbar cannot overflow.\n if (!this.ungroupedItems.length) {\n return false;\n }\n const element = this.viewElement;\n const uiLanguageDirection = this.viewLocale.uiLanguageDirection;\n const lastChildRect = new Rect(element.lastChild);\n const toolbarRect = new Rect(element);\n if (!this.cachedPadding) {\n const computedStyle = global.window.getComputedStyle(element);\n const paddingProperty = uiLanguageDirection === 'ltr' ? 'paddingRight' : 'paddingLeft';\n // parseInt() is essential because of quirky floating point numbers logic and DOM.\n // If the padding turned out too big because of that, the grouped items dropdown would\n // always look (from the Rect perspective) like it overflows (while it's not).\n this.cachedPadding = Number.parseInt(computedStyle[paddingProperty]);\n }\n if (uiLanguageDirection === 'ltr') {\n return lastChildRect.right > toolbarRect.right - this.cachedPadding;\n } else {\n return lastChildRect.left < toolbarRect.left + this.cachedPadding;\n }\n }\n /**\n\t * Enables the functionality that prevents {@link #ungroupedItems} from overflowing (wrapping to the next row)\n\t * upon resize when there is little space available. Instead, the toolbar items are moved to the\n\t * {@link #groupedItems} collection and displayed in a dropdown at the end of the row (which has its own nested toolbar).\n\t *\n\t * When called, the toolbar will automatically analyze the location of its {@link #ungroupedItems} and \"group\"\n\t * them in the dropdown if necessary. It will also observe the browser window for size changes in\n\t * the future and respond to them by grouping more items or reverting already grouped back, depending\n\t * on the visual space available.\n\t *\n\t * @private\n\t */\n _enableGroupingOnResize() {\n let previousWidth;\n // TODO: Consider debounce.\n this.resizeObserver = getResizeObserver(([entry]) => {\n if (!previousWidth || previousWidth !== entry.contentRect.width) {\n this._updateGrouping();\n previousWidth = entry.contentRect.width;\n }\n });\n this.resizeObserver.observe(this.viewElement);\n this._updateGrouping();\n }\n /**\n\t * When called, it will remove the last item from {@link #ungroupedItems} and move it back\n\t * to the {@link #groupedItems} collection.\n\t *\n\t * The opposite of {@link #_ungroupFirstItem}.\n\t *\n\t * @private\n\t */\n _groupLastItem() {\n if (!this.groupedItems.length) {\n this.viewChildren.add(new ToolbarSeparatorView());\n this.viewChildren.add(this.groupedItemsDropdown);\n this.viewFocusTracker.add(this.groupedItemsDropdown.element);\n }\n this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last), 0);\n }\n /**\n\t * Moves the very first item belonging to {@link #groupedItems} back\n\t * to the {@link #ungroupedItems} collection.\n\t *\n\t * The opposite of {@link #_groupLastItem}.\n\t *\n\t * @private\n\t */\n _ungroupFirstItem() {\n this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first));\n if (!this.groupedItems.length) {\n this.viewChildren.remove(this.groupedItemsDropdown);\n this.viewChildren.remove(this.viewChildren.last);\n this.viewFocusTracker.remove(this.groupedItemsDropdown.element);\n }\n }\n /**\n\t * Creates the {@link #groupedItemsDropdown} that hosts the members of the {@link #groupedItems}\n\t * collection when there is not enough space in the toolbar to display all items in a single row.\n\t *\n\t * @private\n\t * @returns {module:ui/dropdown/dropdownview~DropdownView}\n\t */\n _createGroupedItemsDropdown() {\n const locale = this.viewLocale;\n const t = locale.t;\n const dropdown = createDropdown(locale);\n dropdown.class = 'ck-toolbar__grouped-dropdown';\n // Make sure the dropdown never sticks out to the left/right. It should be under the main toolbar.\n // (https://github.com/ckeditor/ckeditor5/issues/5608)\n dropdown.panelPosition = locale.uiLanguageDirection === 'ltr' ? 'sw' : 'se';\n addToolbarToDropdown(dropdown, []);\n dropdown.buttonView.set({\n label: t('br'),\n tooltip: true,\n icon: verticalDotsIcon\n });\n // 1:1 pass–through binding.\n dropdown.toolbarView.items.bindTo(this.groupedItems).using(item => item);\n return dropdown;\n }\n /**\n\t * Updates the {@link module:ui/toolbar/toolbarview~ToolbarView#focusables focus–cycleable items}\n\t * collection so it represents the up–to–date state of the UI from the perspective of the user.\n\t *\n\t * For instance, the {@link #groupedItemsDropdown} can show up and hide but when it is visible,\n\t * it must be subject to focus cycling in the toolbar.\n\t *\n\t * See the {@link module:ui/toolbar/toolbarview~ToolbarView#focusables collection} documentation\n\t * to learn more about the purpose of this method.\n\t *\n\t * @private\n\t */\n _updateFocusCycleableItems() {\n this.viewFocusables.clear();\n this.ungroupedItems.map(item => {\n this.viewFocusables.add(item);\n });\n if (this.groupedItems.length) {\n this.viewFocusables.add(this.groupedItemsDropdown);\n }\n }\n} /**\n * Options passed to the {@link module:ui/toolbar/toolbarview~ToolbarView#constructor} of the toolbar.\n *\n * @interface module:ui/toolbar/toolbarview~ToolbarOptions\n */\n /**\n * When set to `true`, the toolbar will automatically group {@link module:ui/toolbar/toolbarview~ToolbarView#items} that\n * would normally wrap to the next line when there is not enough space to display them in a single row, for\n * instance, if the parent container of the toolbar is narrow.\n *\n * @member {Boolean} module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull\n */\n /**\n * A class interface defining the behavior of the {@link module:ui/toolbar/toolbarview~ToolbarView}.\n *\n * Toolbar behaviors extend its look and functionality and have an impact on the\n * {@link module:ui/toolbar/toolbarview~ToolbarView#element} template or\n * {@link module:ui/toolbar/toolbarview~ToolbarView#render rendering}. They can be enabled\n * conditionally, e.g. depending on the configuration of the toolbar.\n *\n * @private\n * @interface module:ui/toolbar/toolbarview~ToolbarBehavior\n */\n /**\n * Creates a new toolbar behavior instance.\n *\n * The instance is created in the {@link module:ui/toolbar/toolbarview~ToolbarView#constructor} of the toolbar.\n * This is the right place to extend the {@link module:ui/toolbar/toolbarview~ToolbarView#template} of\n * the toolbar, define extra toolbar properties, etc.\n *\n * @method #constructor\n * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar that this behavior is added to.\n */\n /**\n * A method called after the toolbar has been {@link module:ui/toolbar/toolbarview~ToolbarView#render rendered}.\n * It can be used to, for example, customize the behavior of the toolbar when its {@link module:ui/toolbar/toolbarview~ToolbarView#element}\n * is available.\n *\n * @readonly\n * @member {Function} #render\n * @param {module:ui/toolbar/toolbarview~ToolbarView} view An instance of the toolbar being rendered.\n */\n /**\n * A method called after the toolbar has been {@link module:ui/toolbar/toolbarview~ToolbarView#destroy destroyed}.\n * It allows cleaning up after the toolbar behavior, for instance, this is the right place to detach\n * event listeners, free up references, etc.\n *\n * @readonly\n * @member {Function} #destroy\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/preventdefault\n */\n\n/**\n * A helper which executes a native `Event.preventDefault()` if the target of an event equals the\n * {@link module:ui/view~View#element element of the view}. It shortens the definition of a\n * {@link module:ui/view~View#template template}.\n *\n *\t\t// In a class extending View.\n *\t\timport preventDefault from '@ckeditor/ckeditor5-ui/src/bindings/preventdefault';\n *\n *\t\t// ...\n *\n *\t\tthis.setTemplate( {\n *\t\t\ttag: 'div',\n *\n *\t\t\ton: {\n *\t\t\t\t// Prevent the default mousedown action on this view.\n *\t\t\t\tmousedown: preventDefault( this )\n *\t\t\t}\n *\t\t} );\n *\n * @param {module:ui/view~View} view View instance that defines the template.\n * @returns {module:ui/template~TemplateToBinding}\n */\nexport default function preventDefault( view ) {\n\treturn view.bindTemplate.to( evt => {\n\t\tif ( evt.target === view.element ) {\n\t\t\tevt.preventDefault();\n\t\t}\n\t} );\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><circle cx=\\\"9.5\\\" cy=\\\"4.5\\\" r=\\\"1.5\\\"/><circle cx=\\\"9.5\\\" cy=\\\"10.5\\\" r=\\\"1.5\\\"/><circle cx=\\\"9.5\\\" cy=\\\"16.5\\\" r=\\\"1.5\\\"/></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditoruiview\n */\n\nimport BoxedEditorUIView from '@ckeditor/ckeditor5-ui/src/editorui/boxed/boxededitoruiview';\nimport InlineEditableUIView from '@ckeditor/ckeditor5-ui/src/editableui/inline/inlineeditableuiview';\nimport StickyPanelView from '@ckeditor/ckeditor5-ui/src/panel/sticky/stickypanelview';\nimport ToolbarView from '@ckeditor/ckeditor5-ui/src/toolbar/toolbarview';\n\nimport '../theme/classiceditor.css';\n\n/**\n * Classic editor UI view. Uses an inline editable and a sticky toolbar, all\n * enclosed in a boxed UI view.\n *\n * @extends module:ui/editorui/boxed/boxededitoruiview~BoxedEditorUIView\n */\nexport default class ClassicEditorUIView extends BoxedEditorUIView {\n\t/**\n\t * Creates an instance of the classic editor UI view.\n\t *\n\t * @param {module:utils/locale~Locale} locale The {@link module:core/editor/editor~Editor#locale} instance.\n\t * @param {module:engine/view/view~View} editingView The editing view instance this view is related to.\n\t * @param {Object} [options={}] Configuration options fo the view instance.\n\t * @param {Boolean} [options.shouldToolbarGroupWhenFull] When set `true` enables automatic items grouping\n\t * in the main {@link module:editor-classic/classiceditoruiview~ClassicEditorUIView#toolbar toolbar}.\n\t * See {@link module:ui/toolbar/toolbarview~ToolbarOptions#shouldGroupWhenFull} to learn more.\n\t */\n\tconstructor( locale, editingView, options = {} ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Sticky panel view instance. This is a parent view of a {@link #toolbar}\n\t\t * that makes toolbar sticky.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/panel/sticky/stickypanelview~StickyPanelView}\n\t\t */\n\t\tthis.stickyPanel = new StickyPanelView( locale );\n\n\t\t/**\n\t\t * Toolbar view instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/toolbar/toolbarview~ToolbarView}\n\t\t */\n\t\tthis.toolbar = new ToolbarView( locale, {\n\t\t\tshouldGroupWhenFull: options.shouldToolbarGroupWhenFull\n\t\t} );\n\n\t\t/**\n\t\t * Editable UI view.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/editableui/inline/inlineeditableuiview~InlineEditableUIView}\n\t\t */\n\t\tthis.editable = new InlineEditableUIView( locale, editingView );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\t// Set toolbar as a child of a stickyPanel and makes toolbar sticky.\n\t\tthis.stickyPanel.content.add( this.toolbar );\n\n\t\tthis.top.add( this.stickyPanel );\n\t\tthis.main.add( this.editable );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module editor-classic/classiceditor\n */\n\nimport Editor from '@ckeditor/ckeditor5-core/src/editor/editor';\nimport DataApiMixin from '@ckeditor/ckeditor5-core/src/editor/utils/dataapimixin';\nimport ElementApiMixin from '@ckeditor/ckeditor5-core/src/editor/utils/elementapimixin';\nimport attachToForm from '@ckeditor/ckeditor5-core/src/editor/utils/attachtoform';\nimport HtmlDataProcessor from '@ckeditor/ckeditor5-engine/src/dataprocessor/htmldataprocessor';\nimport ClassicEditorUI from './classiceditorui';\nimport ClassicEditorUIView from './classiceditoruiview';\nimport getDataFromElement from '@ckeditor/ckeditor5-utils/src/dom/getdatafromelement';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport { isElement } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The {@glink builds/guides/overview#classic-editor classic editor} implementation.\n * It uses an inline editable and a sticky toolbar, all enclosed in a boxed UI.\n * See the {@glink examples/builds/classic-editor demo}.\n *\n * In order to create a classic editor instance, use the static\n * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`} method.\n *\n * # Classic editor and classic build\n *\n * The classic editor can be used directly from source (if you installed the\n * [`@ckeditor/ckeditor5-editor-classic`](https://www.npmjs.com/package/@ckeditor/ckeditor5-editor-classic) package)\n * but it is also available in the {@glink builds/guides/overview#classic-editor classic build}.\n *\n * {@glink builds/guides/overview Builds} are ready-to-use editors with plugins bundled in. When using the editor from\n * source you need to take care of loading all plugins by yourself\n * (through the {@link module:core/editor/editorconfig~EditorConfig#plugins `config.plugins`} option).\n * Using the editor from source gives much better flexibility and allows easier customization.\n *\n * Read more about initializing the editor from source or as a build in\n * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}.\n *\n * @mixes module:core/editor/utils/dataapimixin~DataApiMixin\n * @mixes module:core/editor/utils/elementapimixin~ElementApiMixin\n * @implements module:core/editor/editorwithui~EditorWithUI\n * @extends module:core/editor/editor~Editor\n */\nexport default class ClassicEditor extends Editor {\n\t/**\n\t * Creates an instance of the classic editor.\n\t *\n\t * **Note:** do not use the constructor to create editor instances. Use the static\n\t * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`} method instead.\n\t *\n\t * @protected\n\t * @param {HTMLElement|String} sourceElementOrData The DOM element that will be the source for the created editor\n\t * or the editor's initial data. For more information see\n\t * {@link module:editor-classic/classiceditor~ClassicEditor.create `ClassicEditor.create()`}.\n\t * @param {module:core/editor/editorconfig~EditorConfig} config The editor configuration.\n\t */\n\tconstructor( sourceElementOrData, config ) {\n\t\tsuper( config );\n\n\t\tif ( isElement( sourceElementOrData ) ) {\n\t\t\tthis.sourceElement = sourceElementOrData;\n\t\t}\n\n\t\tthis.data.processor = new HtmlDataProcessor();\n\n\t\tthis.model.document.createRoot();\n\n\t\tconst shouldToolbarGroupWhenFull = !this.config.get( 'toolbar.shouldNotGroupWhenFull' );\n\t\tconst view = new ClassicEditorUIView( this.locale, this.editing.view, {\n\t\t\tshouldToolbarGroupWhenFull\n\t\t} );\n\n\t\tthis.ui = new ClassicEditorUI( this, view );\n\n\t\tattachToForm( this );\n\t}\n\n\t/**\n\t * Destroys the editor instance, releasing all resources used by it.\n\t *\n\t * Updates the editor's source element with the data.\n\t *\n\t * @returns {Promise}\n\t */\n\tdestroy() {\n\t\tif ( this.sourceElement ) {\n\t\t\tthis.updateSourceElement();\n\t\t}\n\n\t\tthis.ui.destroy();\n\n\t\treturn super.destroy();\n\t}\n\n\t/**\n\t * Creates a new classic editor instance.\n\t *\n\t * There are three ways how the editor can be initialized.\n\t *\n\t * # Replacing a DOM element (and loading data from it)\n\t *\n\t * You can initialize the editor using an existing DOM element:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ) )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * The element's content will be used as the editor data and the element will be replaced by the editor UI.\n\t *\n\t * # Creating a detached editor\n\t *\n\t * Alternatively, you can initialize the editor by passing the initial data directly as a string.\n\t * In this case, the editor will render an element that must be inserted into the DOM:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( '<p>Hello world!</p>' )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\n\t *\t\t\t\t// Initial data was provided so the editor UI element needs to be added manually to the DOM.\n\t *\t\t\t\tdocument.body.appendChild( editor.ui.element );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * This lets you dynamically append the editor to your web page whenever it is convenient for you. You may use this method if your\n\t * web page content is generated on the client side and the DOM structure is not ready at the moment when you initialize the editor.\n\t *\n\t * # Replacing a DOM element (and data provided in `config.initialData`)\n\t *\n\t * You can also mix these two ways by providing a DOM element to be used and passing the initial data through the configuration:\n\t *\n\t *\t\tClassicEditor\n\t *\t\t\t.create( document.querySelector( '#editor' ), {\n\t *\t\t\t\tinitialData: '<h2>Initial data</h2><p>Foo bar.</p>'\n\t *\t\t\t} )\n\t *\t\t\t.then( editor => {\n\t *\t\t\t\tconsole.log( 'Editor was initialized', editor );\n\t *\t\t\t} )\n\t *\t\t\t.catch( err => {\n\t *\t\t\t\tconsole.error( err.stack );\n\t *\t\t\t} );\n\t *\n\t * This method can be used to initialize the editor on an existing element with the specified content in case if your integration\n\t * makes it difficult to set the content of the source element.\n\t *\n\t * Note that an error will be thrown if you pass the initial data both as the first parameter and also in the configuration.\n\t *\n\t * # Configuring the editor\n\t *\n\t * See the {@link module:core/editor/editorconfig~EditorConfig editor configuration documentation} to learn more about\n\t * customizing plugins, toolbar and more.\n\t *\n\t * # Using the editor from source\n\t *\n\t * The code samples listed in the previous sections of this documentation assume that you are using an\n\t * {@glink builds/guides/overview editor build} (for example – `@ckeditor/ckeditor5-build-classic`).\n\t *\n\t * If you want to use the classic editor from source (`@ckeditor/ckeditor5-editor-classic/src/classiceditor`),\n\t * you need to define the list of\n\t * {@link module:core/editor/editorconfig~EditorConfig#plugins plugins to be initialized} and\n\t * {@link module:core/editor/editorconfig~EditorConfig#toolbar toolbar items}. Read more about using the editor from\n\t * source in the {@glink builds/guides/integration/advanced-setup \"Advanced setup\" guide}.\n\t *\n\t * @param {HTMLElement|String} sourceElementOrData The DOM element that will be the source for the created editor\n\t * or the editor's initial data.\n\t *\n\t * If a DOM element is passed, its content will be automatically loaded to the editor upon initialization\n\t * and the {@link module:editor-classic/classiceditorui~ClassicEditorUI#element editor element} will replace the passed element\n\t * in the DOM (the original one will be hidden and the editor will be injected next to it).\n\t *\n\t * Moreover, the editor data will be set back to the original element once the editor is destroyed and when a form, in which\n\t * this element is contained, is submitted (if the original element is a `<textarea>`). This ensures seamless integration with native\n\t * web forms.\n\t *\n\t * If the initial data is passed, a detached editor will be created. In this case you need to insert it into the DOM manually.\n\t * It is available under the {@link module:editor-classic/classiceditorui~ClassicEditorUI#element `editor.ui.element`} property.\n\t *\n\t * @param {module:core/editor/editorconfig~EditorConfig} [config] The editor configuration.\n\t * @returns {Promise} A promise resolved once the editor is ready. The promise resolves with the created editor instance.\n\t */\n\tstatic create( sourceElementOrData, config = {} ) {\n\t\treturn new Promise( resolve => {\n\t\t\tconst editor = new this( sourceElementOrData, config );\n\n\t\t\tresolve(\n\t\t\t\teditor.initPlugins()\n\t\t\t\t\t.then( () => editor.ui.init( isElement( sourceElementOrData ) ? sourceElementOrData : null ) )\n\t\t\t\t\t.then( () => {\n\t\t\t\t\t\tif ( !isElement( sourceElementOrData ) && config.initialData ) {\n\t\t\t\t\t\t\t// Documented in core/editor/editorconfig.jdoc.\n\t\t\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t\t\t'editor-create-initial-data: ' +\n\t\t\t\t\t\t\t\t'The config.initialData option cannot be used together with initial data passed in Editor.create().',\n\t\t\t\t\t\t\t\tnull\n\t\t\t\t\t\t\t);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tconst initialData = config.initialData || getInitialData( sourceElementOrData );\n\n\t\t\t\t\t\treturn editor.data.init( initialData );\n\t\t\t\t\t} )\n\t\t\t\t\t.then( () => editor.fire( 'ready' ) )\n\t\t\t\t\t.then( () => editor )\n\t\t\t);\n\t\t} );\n\t}\n}\n\nmix( ClassicEditor, DataApiMixin );\nmix( ClassicEditor, ElementApiMixin );\n\nfunction getInitialData( sourceElementOrData ) {\n\treturn isElement( sourceElementOrData ) ? getDataFromElement( sourceElementOrData ) : sourceElementOrData;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { isFunction } from 'lodash-es';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * @module core/editor/utils/attachtoform\n */\n\n/**\n * Checks if the editor is initialized on a `<textarea>` element that belongs to a form. If yes, it updates the editor's element\n * content before submitting the form.\n *\n * This helper requires the {@link module:core/editor/utils/elementapimixin~ElementApi ElementApi interface}.\n *\n * @param {module:core/editor/editor~Editor} editor Editor instance.\n */\nexport default function attachToForm( editor ) {\n\tif ( !isFunction( editor.updateSourceElement ) ) {\n\t\t/**\n\t\t * The editor passed to `attachToForm()` must implement the\n\t\t * {@link module:core/editor/utils/elementapimixin~ElementApi} interface.\n\t\t *\n\t\t * @error attachtoform-missing-elementapi-interface\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'attachtoform-missing-elementapi-interface: Editor passed to attachToForm() must implement ElementApi.',\n\t\t\teditor\n\t\t);\n\t}\n\n\tconst sourceElement = editor.sourceElement;\n\n\t// Only when replacing a textarea which is inside of a form element.\n\tif ( sourceElement && sourceElement.tagName.toLowerCase() === 'textarea' && sourceElement.form ) {\n\t\tlet originalSubmit;\n\t\tconst form = sourceElement.form;\n\t\tconst onSubmit = () => editor.updateSourceElement();\n\n\t\t// Replace the original form#submit() to call a custom submit function first.\n\t\t// Check if #submit is a function because the form might have an input named \"submit\".\n\t\tif ( isFunction( form.submit ) ) {\n\t\t\toriginalSubmit = form.submit;\n\n\t\t\tform.submit = () => {\n\t\t\t\tonSubmit();\n\t\t\t\toriginalSubmit.apply( form );\n\t\t\t};\n\t\t}\n\n\t\t// Update the replaced textarea with data before each form#submit event.\n\t\tform.addEventListener( 'submit', onSubmit );\n\n\t\t// Remove the submit listener and revert the original submit method on\n\t\t// editor#destroy.\n\t\teditor.on( 'destroy', () => {\n\t\t\tform.removeEventListener( 'submit', onSubmit );\n\n\t\t\tif ( originalSubmit ) {\n\t\t\t\tform.submit = originalSubmit;\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals HTMLTextAreaElement */\n\n/**\n * @module utils/dom/getdatafromelement\n */\n\n/**\n * Gets data from a given source element.\n *\n * @param {HTMLElement} el The element from which the data will be retrieved.\n * @returns {String} The data string.\n */\nexport default function getDataFromElement( el ) {\n\tif ( el instanceof HTMLTextAreaElement ) {\n\t\treturn el.value;\n\t}\n\n\treturn el.innerHTML;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/plugin\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor plugin classes.\n *\n * @implements module:core/plugin~PluginInterface\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor instance.\n\t\t *\n\t\t * Note that most editors implement the {@link module:core/editor/editorwithui~EditorWithUI} interface in addition\n\t\t * to the base {@link module:core/editor/editor~Editor} interface. However, editors with an external UI\n\t\t * (i.e. Bootstrap-based) or a headless editor may not implement the {@link module:core/editor/editorwithui~EditorWithUI}\n\t\t * interface.\n\t\t *\n\t\t * Because of above, to make plugins more universal, it is recommended to split features into:\n\t\t * - The \"editing\" part that only uses the {@link module:core/editor/editor~Editor} interface.\n\t\t * - The \"UI\" part that uses both the {@link module:core/editor/editor~Editor} interface and\n\t\t * the {@link module:core/editor/editorwithui~EditorWithUI} interface.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n}\n\nmix( Plugin, ObservableMixin );\n\n/**\n * The base interface for CKEditor plugins.\n *\n * In its minimal form a plugin can be a simple function that accepts {@link module:core/editor/editor~Editor the editor}\n * as a parameter:\n *\n *\t\t// A simple plugin that enables a data processor.\n *\t\tfunction MyPlugin( editor ) {\n *\t\t\teditor.data.processor = new MyDataProcessor();\n *\t\t}\n *\n * In most cases however, you will want to inherit from the {@link module:core/plugin~Plugin} class which implements the\n * {@link module:utils/observablemixin~ObservableMixin} and is, therefore, more convenient:\n *\n *\t\tclass MyPlugin extends Plugin {\n *\t\t\tinit() {\n *\t\t\t\t// `listenTo()` and `editor` are available thanks to `Plugin`.\n *\t\t\t\t// By using `listenTo()` you will ensure that the listener is removed when\n *\t\t\t\t// the plugin is destroyed.\n *\t\t\t\tthis.listenTo( this.editor.data, 'ready', () => {\n *\t\t\t\t\t// Do something when the data is ready.\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n * The plugin can also implement methods (e.g. {@link module:core/plugin~PluginInterface#init `init()`} or\n * {@link module:core/plugin~PluginInterface#destroy `destroy()`}) which, when present, will be used to properly\n * initialize and destroy the plugin.\n *\n * **Note:** When defined as a plain function, the plugin acts as a constructor and will be\n * called in parallel with other plugins' {@link module:core/plugin~PluginInterface#constructor constructors}.\n * This means the code of that plugin will be executed **before** {@link module:core/plugin~PluginInterface#init `init()`} and\n * {@link module:core/plugin~PluginInterface#afterInit `afterInit()`} methods of other plugins and, for instance,\n * you cannot use it to extend other plugins' {@glink framework/guides/architecture/editing-engine#schema schema}\n * rules as they are defined later on during the `init()` stage.\n *\n * @interface PluginInterface\n */\n\n/**\n * Creates a new plugin instance. This is the first step of the plugin initialization.\n * See also {@link #init} and {@link #afterInit}.\n *\n * A plugin is always instantiated after its {@link module:core/plugin~PluginInterface.requires dependencies} and the\n * {@link #init} and {@link #afterInit} methods are called in the same order.\n *\n * Usually, you will want to put your plugin's initialization code in the {@link #init} method.\n * The constructor can be understood as \"before init\" and used in special cases, just like\n * {@link #afterInit} serves the special \"after init\" scenarios (e.g.the code which depends on other\n * plugins, but which does not {@link module:core/plugin~PluginInterface.requires explicitly require} them).\n *\n * @method #constructor\n * @param {module:core/editor/editor~Editor} editor\n */\n\n/**\n * An array of plugins required by this plugin.\n *\n * To keep the plugin class definition tight it is recommended to define this property as a static getter:\n *\n *\t\timport Image from './image.js';\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get requires() {\n *\t\t\t\treturn [ Image ];\n *\t\t\t}\n *\t\t}\n *\n * @static\n * @readonly\n * @member {Array.<Function>|undefined} module:core/plugin~PluginInterface.requires\n */\n\n/**\n * An optional name of the plugin. If set, the plugin will be available in\n * {@link module:core/plugincollection~PluginCollection#get} by its\n * name and its constructor. If not, then only by its constructor.\n *\n * The name should reflect the constructor name.\n *\n * To keep the plugin class definition tight it is recommended to define this property as a static getter:\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get pluginName() {\n *\t\t\t\treturn 'ImageCaption';\n *\t\t\t}\n *\t\t}\n *\n * Note: The native `Function.name` property could not be used to keep the plugin name because\n * it will be mangled during code minification.\n *\n * Naming a plugin is necessary to enable removing it through the\n * {@link module:core/editor/editorconfig~EditorConfig#removePlugins `config.removePlugins`} option.\n *\n * @static\n * @readonly\n * @member {String|undefined} module:core/plugin~PluginInterface.pluginName\n */\n\n/**\n * The second stage (after plugin {@link #constructor}) of plugin initialization.\n * Unlike the plugin constructor this method can be asynchronous.\n *\n * A plugin's `init()` method is called after its {@link module:core/plugin~PluginInterface.requires dependencies} are initialized,\n * so in the same order as constructors of these plugins.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #init\n * @returns {null|Promise}\n */\n\n/**\n * The third (and last) stage of plugin initialization. See also {@link #constructor} and {@link #init}.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #afterInit\n * @returns {null|Promise}\n */\n\n/**\n * Destroys the plugin.\n *\n * **Note:** This method is optional. A plugin instance does not need to have it defined.\n *\n * @method #destroy\n * @returns {null|Promise}\n */\n\n/**\n * Array of loaded plugins.\n *\n * @typedef {Array.<module:core/plugin~PluginInterface>} module:core/plugin~LoadedPlugins\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/datatransfer\n */\n\n/**\n * Facade over the native [`DataTransfer`](https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer) object.\n */\nexport default class DataTransfer {\n\tconstructor( nativeDataTransfer ) {\n\t\t/**\n\t\t * The array of files created from the native `DataTransfer#files` or `DataTransfer#items`.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<File>} #files\n\t\t */\n\t\tthis.files = getFiles( nativeDataTransfer );\n\n\t\t/**\n\t\t * The native DataTransfer object.\n\t\t *\n\t\t * @private\n\t\t * @member {DataTransfer} #_native\n\t\t */\n\t\tthis._native = nativeDataTransfer;\n\t}\n\n\t/**\n\t * Returns an array of available native content types.\n\t *\n\t * @returns {Array.<String>}\n\t */\n\tget types() {\n\t\treturn this._native.types;\n\t}\n\n\t/**\n\t * Gets data from the data transfer by its mime type.\n\t *\n\t *\t\tdataTransfer.getData( 'text/plain' );\n\t *\n\t * @param {String} type The mime type. E.g. `text/html` or `text/plain`.\n\t * @returns {String}\n\t */\n\tgetData( type ) {\n\t\treturn this._native.getData( type );\n\t}\n\n\t/**\n\t * Sets data in the data transfer.\n\t *\n\t * @param {String} type The mime type. E.g. `text/html` or `text/plain`.\n\t * @param {String} data\n\t */\n\tsetData( type, data ) {\n\t\tthis._native.setData( type, data );\n\t}\n}\n\nfunction getFiles( nativeDataTransfer ) {\n\t// DataTransfer.files and items are Array-like and might not have an iterable interface.\n\tconst files = nativeDataTransfer.files ? Array.from( nativeDataTransfer.files ) : [];\n\tconst items = nativeDataTransfer.items ? Array.from( nativeDataTransfer.items ) : [];\n\n\tif ( files.length ) {\n\t\treturn files;\n\t}\n\t// Chrome have empty DataTransfer.files, but let get files through the items interface.\n\treturn items\n\t\t.filter( item => item.kind === 'file' )\n\t\t.map( item => item.getAsFile() );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/clipboardobserver\n */\n\nimport DomEventObserver from '@ckeditor/ckeditor5-engine/src/view/observer/domeventobserver';\nimport EventInfo from '@ckeditor/ckeditor5-utils/src/eventinfo';\nimport DataTransfer from './datatransfer';\n\n/**\n * Clipboard events observer.\n *\n * Fires the following events:\n *\n * * {@link module:engine/view/document~Document#event:clipboardInput}\n * * {@link module:engine/view/document~Document#event:dragover}\n * * {@link module:engine/view/document~Document#event:drop}\n * * {@link module:engine/view/document~Document#event:paste}\n * * {@link module:engine/view/document~Document#event:copy}\n * * {@link module:engine/view/document~Document#event:cut}\n *\n * Note that this observer is not available by default (it is not added by the engine).\n * To make it available it needs to be added to {@link module:engine/view/document~Document} by\n * the {@link module:engine/view/view~View#addObserver `View#addObserver()`} method. You can also load the\n * {@link module:clipboard/clipboard~Clipboard} plugin which adds this observer automatically (because it uses it).\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class ClipboardObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst viewDocument = this.document;\n\n\t\tthis.domEventType = [ 'paste', 'copy', 'cut', 'drop', 'dragover' ];\n\n\t\tthis.listenTo( viewDocument, 'paste', handleInput, { priority: 'low' } );\n\t\tthis.listenTo( viewDocument, 'drop', handleInput, { priority: 'low' } );\n\n\t\tfunction handleInput( evt, data ) {\n\t\t\tdata.preventDefault();\n\n\t\t\tconst targetRanges = data.dropRange ? [ data.dropRange ] : Array.from( viewDocument.selection.getRanges() );\n\n\t\t\tconst eventInfo = new EventInfo( viewDocument, 'clipboardInput' );\n\n\t\t\tviewDocument.fire( eventInfo, {\n\t\t\t\tdataTransfer: data.dataTransfer,\n\t\t\t\ttargetRanges\n\t\t\t} );\n\n\t\t\t// If CKEditor handled the input, do not bubble the original event any further.\n\t\t\t// This helps external integrations recognize that fact and act accordingly.\n\t\t\t// https://github.com/ckeditor/ckeditor5-upload/issues/92\n\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\tdata.stopPropagation();\n\t\t\t}\n\t\t}\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tconst evtData = {\n\t\t\tdataTransfer: new DataTransfer( domEvent.clipboardData ? domEvent.clipboardData : domEvent.dataTransfer )\n\t\t};\n\n\t\tif ( domEvent.type == 'drop' ) {\n\t\t\tevtData.dropRange = getDropViewRange( this.view, domEvent );\n\t\t}\n\n\t\tthis.fire( domEvent.type, domEvent, evtData );\n\t}\n}\n\nfunction getDropViewRange( view, domEvent ) {\n\tconst domDoc = domEvent.target.ownerDocument;\n\tconst x = domEvent.clientX;\n\tconst y = domEvent.clientY;\n\tlet domRange;\n\n\t// Webkit & Blink.\n\tif ( domDoc.caretRangeFromPoint && domDoc.caretRangeFromPoint( x, y ) ) {\n\t\tdomRange = domDoc.caretRangeFromPoint( x, y );\n\t}\n\t// FF.\n\telse if ( domEvent.rangeParent ) {\n\t\tdomRange = domDoc.createRange();\n\t\tdomRange.setStart( domEvent.rangeParent, domEvent.rangeOffset );\n\t\tdomRange.collapse( true );\n\t}\n\n\tif ( domRange ) {\n\t\treturn view.domConverter.domRangeToView( domRange );\n\t} else {\n\t\treturn view.document.selection.getFirstRange();\n\t}\n}\n\n/**\n * Fired as a continuation of {@link #event:paste} and {@link #event:drop} events.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#input-pipeline \"clipboard input pipeline\"}.\n *\n * Fired with a `dataTransfer` which comes from the clipboard and which content should be processed\n * and inserted into the editor.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:engine/view/document~Document#event:clipboardInput\n * @param {Object} data Event data.\n * @param {module:clipboard/datatransfer~DataTransfer} data.dataTransfer Data transfer instance.\n * @param {Array.<module:engine/view/range~Range>} data.targetRanges Ranges which are the target of the operation\n * (usually – into which the content should be inserted).\n * If clipboard input was triggered by a paste operation, then these are the selection ranges. If by a drop operation,\n * then it's the drop position (which can be different than the selection at the moment of drop).\n */\n\n/**\n * Fired when user drags content over one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:dragover\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user dropped content into one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:drop\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n * @param {module:engine/view/range~Range} dropRange The position into which the content is dropped.\n */\n\n/**\n * Fired when user pasted content into one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:engine/view/document~Document#event:clipboardInput\n * @event module:engine/view/document~Document#event:paste\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user copied content from one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @event module:engine/view/document~Document#event:copy\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * Fired when user cut content from one of the editables.\n *\n * Introduced by {@link module:clipboard/clipboardobserver~ClipboardObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:clipboard/clipboardobserver~ClipboardObserver}\n * needs to be added to {@link module:engine/view/document~Document} by the {@link module:engine/view/view~View#addObserver} method.\n * It's done by the {@link module:clipboard/clipboard~Clipboard} feature. If it's not loaded, it must be done manually.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @event module:engine/view/document~Document#event:cut\n * @param {module:clipboard/clipboardobserver~ClipboardEventData} data Event data.\n */\n\n/**\n * The value of the {@link module:engine/view/document~Document#event:paste},\n * {@link module:engine/view/document~Document#event:copy} and {@link module:engine/view/document~Document#event:cut} events.\n *\n * In order to access clipboard data use `dataTransfer` property.\n *\n * @class module:clipboard/clipboardobserver~ClipboardEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n */\n\n/**\n * Data transfer instance.\n *\n * @readonly\n * @member {module:clipboard/datatransfer~DataTransfer} module:clipboard/clipboardobserver~ClipboardEventData#dataTransfer\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/viewtoplaintext\n */\n\n// Elements which should not have empty-line padding.\n// Most `view.ContainerElement` want to be separate by new-line, but some are creating one structure\n// together (like `<li>`) so it is better to separate them by only one \"\\n\".\nconst smallPaddingElements = [ 'figcaption', 'li' ];\n\n/**\n * Converts {@link module:engine/view/item~Item view item} and all of its children to plain text.\n *\n * @param {module:engine/view/item~Item} viewItem View item to convert.\n * @returns {String} Plain text representation of `viewItem`.\n */\nexport default function viewToPlainText( viewItem ) {\n\tlet text = '';\n\n\tif ( viewItem.is( 'text' ) || viewItem.is( 'textProxy' ) ) {\n\t\t// If item is `Text` or `TextProxy` simple take its text data.\n\t\ttext = viewItem.data;\n\t} else if ( viewItem.is( 'img' ) && viewItem.hasAttribute( 'alt' ) ) {\n\t\t// Special case for images - use alt attribute if it is provided.\n\t\ttext = viewItem.getAttribute( 'alt' );\n\t} else {\n\t\t// Other elements are document fragments, attribute elements or container elements.\n\t\t// They don't have their own text value, so convert their children.\n\t\tlet prev = null;\n\n\t\tfor ( const child of viewItem.getChildren() ) {\n\t\t\tconst childText = viewToPlainText( child );\n\n\t\t\t// Separate container element children with one or more new-line characters.\n\t\t\tif ( prev && ( prev.is( 'containerElement' ) || child.is( 'containerElement' ) ) ) {\n\t\t\t\tif ( smallPaddingElements.includes( prev.name ) || smallPaddingElements.includes( child.name ) ) {\n\t\t\t\t\ttext += '\\n';\n\t\t\t\t} else {\n\t\t\t\t\ttext += '\\n\\n';\n\t\t\t\t}\n\t\t\t}\n\n\t\t\ttext += childText;\n\t\t\tprev = child;\n\t\t}\n\t}\n\n\treturn text;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/clipboard\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport ClipboardObserver from './clipboardobserver';\n\nimport plainTextToHtml from './utils/plaintexttohtml';\nimport normalizeClipboardHtml from './utils/normalizeclipboarddata';\nimport viewToPlainText from './utils/viewtoplaintext.js';\n\nimport HtmlDataProcessor from '@ckeditor/ckeditor5-engine/src/dataprocessor/htmldataprocessor';\n\n/**\n * The clipboard feature. It is responsible for intercepting the `paste` and `drop` events and\n * passing the pasted content through the clipboard pipeline in order to insert it into the editor's content.\n * It also handles the `cut` and `copy` events to fill the native clipboard with serialized editor's data.\n *\n * Read more about the clipboard integration in {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive} guide.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Clipboard extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Clipboard';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst modelDocument = editor.model.document;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t/**\n\t\t * Data processor used to convert pasted HTML to a view structure.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/dataprocessor/htmldataprocessor~HtmlDataProcessor} #_htmlDataProcessor\n\t\t */\n\t\tthis._htmlDataProcessor = new HtmlDataProcessor();\n\n\t\tview.addObserver( ClipboardObserver );\n\n\t\t// The clipboard paste pipeline.\n\n\t\t// Pasting and dropping is disabled when editor is read-only.\n\t\t// See: https://github.com/ckeditor/ckeditor5-clipboard/issues/26.\n\t\tthis.listenTo( viewDocument, 'clipboardInput', evt => {\n\t\t\tif ( editor.isReadOnly ) {\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( viewDocument, 'clipboardInput', ( evt, data ) => {\n\t\t\tconst dataTransfer = data.dataTransfer;\n\t\t\tlet content = '';\n\n\t\t\tif ( dataTransfer.getData( 'text/html' ) ) {\n\t\t\t\tcontent = normalizeClipboardHtml( dataTransfer.getData( 'text/html' ) );\n\t\t\t} else if ( dataTransfer.getData( 'text/plain' ) ) {\n\t\t\t\tcontent = plainTextToHtml( dataTransfer.getData( 'text/plain' ) );\n\t\t\t}\n\n\t\t\tcontent = this._htmlDataProcessor.toView( content );\n\n\t\t\tthis.fire( 'inputTransformation', { content, dataTransfer } );\n\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\n\t\tthis.listenTo( this, 'inputTransformation', ( evt, data ) => {\n\t\t\tif ( !data.content.isEmpty ) {\n\t\t\t\tconst dataController = this.editor.data;\n\t\t\t\tconst model = this.editor.model;\n\n\t\t\t\t// Convert the pasted content to a model document fragment.\n\t\t\t\t// Conversion is contextual, but in this case we need an \"all allowed\" context and for that\n\t\t\t\t// we use the $clipboardHolder item.\n\t\t\t\tconst modelFragment = dataController.toModel( data.content, '$clipboardHolder' );\n\n\t\t\t\tif ( modelFragment.childCount == 0 ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tmodel.insertContent( modelFragment );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// The clipboard copy/cut pipeline.\n\n\t\tfunction onCopyCut( evt, data ) {\n\t\t\tconst dataTransfer = data.dataTransfer;\n\n\t\t\tdata.preventDefault();\n\n\t\t\tconst content = editor.data.toView( editor.model.getSelectedContent( modelDocument.selection ) );\n\n\t\t\tviewDocument.fire( 'clipboardOutput', { dataTransfer, content, method: evt.name } );\n\t\t}\n\n\t\tthis.listenTo( viewDocument, 'copy', onCopyCut, { priority: 'low' } );\n\t\tthis.listenTo( viewDocument, 'cut', ( evt, data ) => {\n\t\t\t// Cutting is disabled when editor is read-only.\n\t\t\t// See: https://github.com/ckeditor/ckeditor5-clipboard/issues/26.\n\t\t\tif ( editor.isReadOnly ) {\n\t\t\t\tdata.preventDefault();\n\t\t\t} else {\n\t\t\t\tonCopyCut( evt, data );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\tthis.listenTo( viewDocument, 'clipboardOutput', ( evt, data ) => {\n\t\t\tif ( !data.content.isEmpty ) {\n\t\t\t\tdata.dataTransfer.setData( 'text/html', this._htmlDataProcessor.toData( data.content ) );\n\t\t\t\tdata.dataTransfer.setData( 'text/plain', viewToPlainText( data.content ) );\n\t\t\t}\n\n\t\t\tif ( data.method == 'cut' ) {\n\t\t\t\teditor.model.deleteContent( modelDocument.selection );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\t}\n}\n\n/**\n * Fired with a `content` and `dataTransfer` objects. The `content` which comes from the clipboard (was pasted or dropped)\n * should be processed in order to be inserted into the editor. The `dataTransfer` object is available\n * in case the transformation functions needs access to a raw clipboard data.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#input-pipeline \"clipboard input pipeline\"}.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:clipboard/clipboard~Clipboard#event:inputTransformation\n * @param {Object} data Event data.\n * @param {module:engine/view/documentfragment~DocumentFragment} data.content Event data. Content to be inserted into the editor.\n * It can be modified by the event listeners. Read more about the clipboard pipelines in\n * {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive}.\n * @param {module:clipboard/datatransfer~DataTransfer} data.dataTransfer Data transfer instance.\n */\n\n/**\n * Fired on {@link module:engine/view/document~Document#event:copy} and {@link module:engine/view/document~Document#event:cut}\n * with a copy of selected content. The content can be processed before it ends up in the clipboard.\n *\n * It is a part of the {@glink framework/guides/deep-dive/clipboard#output-pipeline \"clipboard output pipeline\"}.\n *\n * @see module:clipboard/clipboardobserver~ClipboardObserver\n * @see module:clipboard/clipboard~Clipboard\n * @event module:engine/view/document~Document#event:clipboardOutput\n * @param {module:clipboard/clipboard~ClipboardOutputEventData} data Event data.\n */\n\n/**\n * The value of the {@link module:engine/view/document~Document#event:clipboardOutput} event.\n *\n * @class module:clipboard/clipboard~ClipboardOutputEventData\n */\n\n/**\n * Data transfer instance.\n *\n * @readonly\n * @member {module:clipboard/datatransfer~DataTransfer} module:clipboard/clipboard~ClipboardOutputEventData#dataTransfer\n */\n\n/**\n * Content to be put into the clipboard. It can be modified by the event listeners.\n * Read more about the clipboard pipelines in {@glink framework/guides/deep-dive/clipboard \"Clipboard\" deep dive}.\n *\n * @member {module:engine/view/documentfragment~DocumentFragment} module:clipboard/clipboard~ClipboardOutputEventData#content\n */\n\n/**\n * Whether the event was triggered by copy or cut operation.\n *\n * @member {'copy'|'cut'} module:clipboard/clipboard~ClipboardOutputEventData#method\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/normalizeclipboarddata\n */\n\n/**\n * Removes some popular browser quirks out of the clipboard data (HTML).\n *\n * @param {String} data The HTML data to normalize.\n * @returns {String} Normalized HTML.\n */\nexport default function normalizeClipboardData( data ) {\n\treturn data\n\t\t.replace( /<span(?: class=\"Apple-converted-space\"|)>(\\s+)<\\/span>/g, ( fullMatch, spaces ) => {\n\t\t\t// Handle the most popular and problematic case when even a single space becomes an nbsp;.\n\t\t\t// Decode those to normal spaces. Read more in https://github.com/ckeditor/ckeditor5-clipboard/issues/2.\n\t\t\tif ( spaces.length == 1 ) {\n\t\t\t\treturn ' ';\n\t\t\t}\n\n\t\t\treturn spaces;\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module clipboard/utils/plaintexttohtml\n */\n\n/**\n * Converts plain text to its HTML-ized version.\n *\n * @param {String} text The plain text to convert.\n * @returns {String} HTML generated from the plain text.\n */\nexport default function plainTextToHtml( text ) {\n\ttext = text\n\t\t// Encode <>.\n\t\t.replace( /</g, '<' )\n\t\t.replace( />/g, '>' )\n\t\t// Creates paragraphs for every line breaks.\n\t\t.replace( /\\n/g, '</p><p>' )\n\t\t// Preserve trailing spaces (only the first and last one – the rest is handled below).\n\t\t.replace( /^\\s/, ' ' )\n\t\t.replace( /\\s$/, ' ' )\n\t\t// Preserve other subsequent spaces now.\n\t\t.replace( /\\s\\s/g, '  ' );\n\n\tif ( text.indexOf( '</p><p>' ) > -1 ) {\n\t\t// If we created paragraphs above, add the trailing ones.\n\t\ttext = `<p>${ text }</p>`;\n\t}\n\n\t// TODO:\n\t// * What about '\\nfoo' vs ' foo'?\n\n\treturn text;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/command\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor commands.\n *\n * Commands are the main way to manipulate editor contents and state. They are mostly used by UI elements (or by other\n * commands) to make changes in the model. Commands are available in every part of code that has access to\n * the {@link module:core/editor/editor~Editor editor} instance.\n *\n * Instances of registered commands can be retrieved from {@link module:core/editor/editor~Editor#commands `editor.commands`}.\n * The easiest way to execute a command is through {@link module:core/editor/editor~Editor#execute `editor.execute()`}.\n *\n * By default commands are disabled when the editor is in {@link module:core/editor/editor~Editor#isReadOnly read-only} mode.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Command {\n\t/**\n\t * Creates a new `Command` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor Editor on which this command will be used.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor on which this command will be used.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * The value of the command. A concrete command class should define what it represents for it.\n\t\t *\n\t\t * For example, the `'bold'` command's value indicates whether the selection starts in a bolded text.\n\t\t * And the value of the `'link'` command may be an object with links details.\n\t\t *\n\t\t * It is possible for a command to have no value (e.g. for stateless actions such as `'imageUpload'`).\n\t\t *\n\t\t * A concrete command class should control this value by overriding the {@link #refresh `refresh()`} method.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member #value\n\t\t */\n\t\tthis.set( 'value', undefined );\n\n\t\t/**\n\t\t * Flag indicating whether a command is enabled or disabled.\n\t\t * A disabled command will do nothing when executed.\n\t\t *\n\t\t * A concrete command class should control this value by overriding the {@link #refresh `refresh()`} method.\n\t\t *\n\t\t * It is possible to disable a command from \"outside\". For instance, in your integration you may want to disable\n\t\t * a certain set of commands for the time being. To do that, you can use the fact that `isEnabled` is observable\n\t\t * and it fires the `set:isEnabled` event every time anyone tries to modify its value:\n\t\t *\n\t\t *\t\tfunction disableCommand( cmd ) {\n\t\t *\t\t\tcmd.on( 'set:isEnabled', forceDisable, { priority: 'highest' } );\n\t\t *\n\t\t *\t\t\tcmd.isEnabled = false;\n\t\t *\n\t\t *\t\t\t// Make it possible to enable the command again.\n\t\t *\t\t\treturn () => {\n\t\t *\t\t\t\tcmd.off( 'set:isEnabled', forceDisable );\n\t\t *\t\t\t\tcmd.refresh();\n\t\t *\t\t\t};\n\t\t *\n\t\t *\t\t\tfunction forceDisable( evt ) {\n\t\t *\t\t\t\tevt.return = false;\n\t\t *\t\t\t\tevt.stop();\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t *\t\t// Usage:\n\t\t *\n\t\t *\t\t// Disabling the command.\n\t\t *\t\tconst enableBold = disableCommand( editor.commands.get( 'bold' ) );\n\t\t *\n\t\t *\t\t// Enabling the command again.\n\t\t *\t\tenableBold();\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', false );\n\n\t\t/**\n\t\t * Holds identifiers for {@link #forceDisabled} mechanism.\n\t\t *\n\t\t * @type {Set.<String>}\n\t\t * @private\n\t\t */\n\t\tthis._disableStack = new Set();\n\n\t\tthis.decorate( 'execute' );\n\n\t\t// By default every command is refreshed when changes are applied to the model.\n\t\tthis.listenTo( this.editor.model.document, 'change', () => {\n\t\t\tthis.refresh();\n\t\t} );\n\n\t\tthis.on( 'execute', evt => {\n\t\t\tif ( !this.isEnabled ) {\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\n\t\t// By default commands are disabled when the editor is in read-only mode.\n\t\tthis.listenTo( editor, 'change:isReadOnly', ( evt, name, value ) => {\n\t\t\tif ( value ) {\n\t\t\t\tthis.forceDisabled( 'readOnlyMode' );\n\t\t\t} else {\n\t\t\t\tthis.clearForceDisabled( 'readOnlyMode' );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Refreshes the command. The command should update its {@link #isEnabled} and {@link #value} properties\n\t * in this method.\n\t *\n\t * This method is automatically called when\n\t * {@link module:engine/model/document~Document#event:change any changes are applied to the document}.\n\t */\n\trefresh() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the command.\n\t *\n\t * Command may be disabled by multiple features or algorithms (at once). When disabling a command, unique id should be passed\n\t * (e.g. feature name). The same identifier should be used when {@link #clearForceDisabled enabling back} the command.\n\t * The command becomes enabled only after all features {@link #clearForceDisabled enabled it back}.\n\t *\n\t * Disabling and enabling a command:\n\t *\n\t *\t\tcommand.isEnabled; // -> true\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> false\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * Command disabled by multiple features:\n\t *\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.forceDisabled( 'OtherFeature' );\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> false\n\t *\t\tcommand.clearForceDisabled( 'OtherFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * Multiple disabling with the same identifier is redundant:\n\t *\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.forceDisabled( 'MyFeature' );\n\t *\t\tcommand.clearForceDisabled( 'MyFeature' );\n\t *\t\tcommand.isEnabled; // -> true\n\t *\n\t * **Note:** some commands or algorithms may have more complex logic when it comes to enabling or disabling certain commands,\n\t * so the command might be still disabled after {@link #clearForceDisabled} was used.\n\t *\n\t * @param {String} id Unique identifier for disabling. Use the same id when {@link #clearForceDisabled enabling back} the command.\n\t */\n\tforceDisabled( id ) {\n\t\tthis._disableStack.add( id );\n\n\t\tif ( this._disableStack.size == 1 ) {\n\t\t\tthis.on( 'set:isEnabled', forceDisable, { priority: 'highest' } );\n\t\t\tthis.isEnabled = false;\n\t\t}\n\t}\n\n\t/**\n\t * Clears forced disable previously set through {@link #clearForceDisabled}. See {@link #clearForceDisabled}.\n\t *\n\t * @param {String} id Unique identifier, equal to the one passed in {@link #forceDisabled} call.\n\t */\n\tclearForceDisabled( id ) {\n\t\tthis._disableStack.delete( id );\n\n\t\tif ( this._disableStack.size == 0 ) {\n\t\t\tthis.off( 'set:isEnabled', forceDisable );\n\t\t\tthis.refresh();\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * A command may accept parameters. They will be passed from {@link module:core/editor/editor~Editor#execute `editor.execute()`}\n\t * to the command.\n\t *\n\t * The `execute()` method will automatically abort when the command is disabled ({@link #isEnabled} is `false`).\n\t * This behavior is implemented by a high priority listener to the {@link #event:execute} event.\n\t *\n\t * In order to see how to disable a command from \"outside\" see the {@link #isEnabled} documentation.\n\t *\n\t * @fires execute\n\t */\n\texecute() {}\n\n\t/**\n\t * Destroys the command.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Event fired by the {@link #execute} method. The command action is a listener to this event so it's\n\t * possible to change/cancel the behavior of the command by listening to this event.\n\t *\n\t * See {@link module:utils/observablemixin~ObservableMixin#decorate} for more information and samples.\n\t *\n\t * **Note:** This event is fired even if command is disabled. However, it is automatically blocked\n\t * by a high priority listener in order to prevent command execution.\n\t *\n\t * @event execute\n\t */\n}\n\nmix( Command, ObservableMixin );\n\n// Helper function that forces command to be disabled.\nfunction forceDisable( evt ) {\n\tevt.return = false;\n\tevt.stop();\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/entercommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { getCopyOnEnterAttributes } from './utils';\n\n/**\n * Enter command. It is used by the {@link module:enter/enter~Enter Enter feature} to handle the <kbd>Enter</kbd> key.\n *\n * @extends module:core/command~Command\n */\nexport default class EnterCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tenterBlock( this.editor.model, writer, doc.selection, model.schema );\n\t\t\tthis.fire( 'afterExecute', { writer } );\n\t\t} );\n\t}\n}\n\n// Creates a new block in the way that the <kbd>Enter</kbd> key is expected to work.\n//\n// @param {module:engine/model~Model} model\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n// Selection on which the action should be performed.\n// @param {module:engine/model/schema~Schema} schema\nfunction enterBlock( model, writer, selection, schema ) {\n\tconst isSelectionEmpty = selection.isCollapsed;\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\n\t// Don't touch the roots and other limit elements.\n\tif ( schema.isLimit( startElement ) || schema.isLimit( endElement ) ) {\n\t\t// Delete the selected content but only if inside a single limit element.\n\t\t// Abort, when crossing limit elements boundary (e.g. <limit1>x[x</limit1>donttouchme<limit2>y]y</limit2>).\n\t\t// This is an edge case and it's hard to tell what should actually happen because such a selection\n\t\t// is not entirely valid.\n\t\tif ( !isSelectionEmpty && startElement == endElement ) {\n\t\t\tmodel.deleteContent( selection );\n\t\t}\n\n\t\treturn;\n\t}\n\n\tif ( isSelectionEmpty ) {\n\t\tconst attributesToCopy = getCopyOnEnterAttributes( writer.model.schema, selection.getAttributes() );\n\t\tsplitBlock( writer, range.start );\n\t\twriter.setSelectionAttribute( attributesToCopy );\n\t} else {\n\t\tconst leaveUnmerged = !( range.start.isAtStart && range.end.isAtEnd );\n\t\tconst isContainedWithinOneElement = ( startElement == endElement );\n\n\t\tmodel.deleteContent( selection, { leaveUnmerged } );\n\n\t\tif ( leaveUnmerged ) {\n\t\t\t// Partially selected elements.\n\t\t\t//\n\t\t\t// <h>x[xx]x</h>\t\t-> <h>x^x</h>\t\t\t-> <h>x</h><h>^x</h>\n\t\t\tif ( isContainedWithinOneElement ) {\n\t\t\t\tsplitBlock( writer, selection.focus );\n\t\t\t}\n\t\t\t// Selection over multiple elements.\n\t\t\t//\n\t\t\t// <h>x[x</h><p>y]y<p>\t-> <h>x^</h><p>y</p>\t-> <h>x</h><p>^y</p>\n\t\t\telse {\n\t\t\t\twriter.setSelection( endElement, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction splitBlock( writer, splitPos ) {\n\twriter.split( splitPos );\n\twriter.setSelection( splitPos.parent.nextSibling, 0 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/enterobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\nimport DomEventData from '@ckeditor/ckeditor5-engine/src/view/observer/domeventdata';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Enter observer introduces the {@link module:engine/view/document~Document#event:enter} event.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class EnterObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst doc = this.document;\n\n\t\tdoc.on( 'keydown', ( evt, data ) => {\n\t\t\tif ( this.isEnabled && data.keyCode == keyCodes.enter ) {\n\t\t\t\t// Save the event object to check later if it was stopped or not.\n\t\t\t\tlet event;\n\t\t\t\tdoc.once( 'enter', evt => ( event = evt ), { priority: 'highest' } );\n\n\t\t\t\tdoc.fire( 'enter', new DomEventData( doc, data.domEvent, {\n\t\t\t\t\tisSoft: data.shiftKey\n\t\t\t\t} ) );\n\n\t\t\t\t// Stop `keydown` event if `enter` event was stopped.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5/issues/753\n\t\t\t\tif ( event && event.stop.called ) {\n\t\t\t\t\tevt.stop();\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {}\n}\n\n/**\n * Event fired when the user presses the <kbd>Enter</kbd> key.\n *\n * Note: This event is fired by the {@link module:enter/enterobserver~EnterObserver observer}\n * (usually registered by the {@link module:enter/enter~Enter Enter feature} and\n * {@link module:enter/shiftenter~ShiftEnter ShiftEnter feature}).\n *\n * @event module:engine/view/document~Document#event:enter\n * @param {module:engine/view/observer/domeventdata~DomEventData} data\n * @param {Boolean} data.isSoft Whether it's a soft enter (<kbd>Shift</kbd>+<kbd>Enter</kbd>) or hard enter (<kbd>Enter</kbd>).\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/enter\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport EnterCommand from './entercommand';\nimport EnterObserver from './enterobserver';\n\n/**\n * This plugin handles the <kbd>Enter</kbd> key (hard line break) in the editor.\n *\n * See also the {@link module:enter/shiftenter~ShiftEnter} plugin.\n *\n * For more information about this feature see the {@glink api/enter package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Enter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Enter';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\tview.addObserver( EnterObserver );\n\n\t\teditor.commands.add( 'enter', new EnterCommand( editor ) );\n\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tdata.preventDefault();\n\n\t\t\t// The soft enter key is handled by the ShiftEnter plugin.\n\t\t\tif ( data.isSoft ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\teditor.execute( 'enter' );\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/shiftentercommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { getCopyOnEnterAttributes } from './utils';\n\n/**\n * ShiftEnter command. It is used by the {@link module:enter/shiftenter~ShiftEnter ShiftEnter feature} to handle\n * the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke.\n *\n * @extends module:core/command~Command\n */\nexport default class ShiftEnterCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tsoftBreakAction( model, writer, doc.selection );\n\t\t\tthis.fire( 'afterExecute', { writer } );\n\t\t} );\n\t}\n\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.isEnabled = isEnabled( model.schema, doc.selection );\n\t}\n}\n\n// Checks whether the ShiftEnter command should be enabled in the specified selection.\n//\n// @param {module:engine/model/schema~Schema} schema\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\nfunction isEnabled( schema, selection ) {\n\t// At this moment it is okay to support single range selections only.\n\t// But in the future we may need to change that.\n\tif ( selection.rangeCount > 1 ) {\n\t\treturn false;\n\t}\n\n\tconst anchorPos = selection.anchor;\n\n\t// Check whether the break element can be inserted in the current selection anchor.\n\tif ( !anchorPos || !schema.checkChild( anchorPos, 'softBreak' ) ) {\n\t\treturn false;\n\t}\n\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\n\t// Do not modify the content if selection is cross-limit elements.\n\tif ( ( isInsideLimitElement( startElement, schema ) || isInsideLimitElement( endElement, schema ) ) && startElement !== endElement ) {\n\t\treturn false;\n\t}\n\n\treturn true;\n}\n\n// Creates a break in the way that the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke is expected to work.\n//\n// @param {module:engine/model~Model} model\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n// Selection on which the action should be performed.\nfunction softBreakAction( model, writer, selection ) {\n\tconst isSelectionEmpty = selection.isCollapsed;\n\tconst range = selection.getFirstRange();\n\tconst startElement = range.start.parent;\n\tconst endElement = range.end.parent;\n\tconst isContainedWithinOneElement = ( startElement == endElement );\n\n\tif ( isSelectionEmpty ) {\n\t\tconst attributesToCopy = getCopyOnEnterAttributes( model.schema, selection.getAttributes() );\n\t\tinsertBreak( writer, range.end );\n\n\t\twriter.removeSelectionAttribute( selection.getAttributeKeys() );\n\t\twriter.setSelectionAttribute( attributesToCopy );\n\t} else {\n\t\tconst leaveUnmerged = !( range.start.isAtStart && range.end.isAtEnd );\n\t\tmodel.deleteContent( selection, { leaveUnmerged } );\n\n\t\t// Selection within one element:\n\t\t//\n\t\t// <h>x[xx]x</h>\t\t-> <h>x^x</h>\t\t\t-> <h>x<br>^x</h>\n\t\tif ( isContainedWithinOneElement ) {\n\t\t\tinsertBreak( writer, selection.focus );\n\t\t}\n\t\t// Selection over multiple elements.\n\t\t//\n\t\t// <h>x[x</h><p>y]y<p>\t-> <h>x^</h><p>y</p>\t-> <h>x</h><p>^y</p>\n\t\t//\n\t\t// We chose not to insert a line break in this case because:\n\t\t//\n\t\t// * it's not a very common scenario,\n\t\t// * it actually surprised me when I saw the \"expected behavior\" in real life.\n\t\t//\n\t\t// It's ok if the user will need to be more specific where they want the <br> to be inserted.\n\t\telse {\n\t\t\t// Move the selection to the 2nd element (last step of the example above).\n\t\t\tif ( leaveUnmerged ) {\n\t\t\t\twriter.setSelection( endElement, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction insertBreak( writer, position ) {\n\tconst breakLineElement = writer.createElement( 'softBreak' );\n\n\twriter.insert( breakLineElement, position );\n\twriter.setSelection( breakLineElement, 'after' );\n}\n\n// Checks whether the specified `element` is a child of the limit element.\n//\n// Checking whether the `<p>` element is inside a limit element:\n// - <$root><p>Text.</p></$root> => false\n// - <$root><limitElement><p>Text</p></limitElement></$root> => true\n//\n// @param {module:engine/model/element~Element} element\n// @param {module:engine/schema~Schema} schema\n// @returns {Boolean}\nfunction isInsideLimitElement( element, schema ) {\n\t// `$root` is a limit element but in this case is an invalid element.\n\tif ( element.is( 'rootElement' ) ) {\n\t\treturn false;\n\t}\n\n\treturn schema.isLimit( element ) || isInsideLimitElement( element.parent, schema );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/injectunsafekeystrokeshandling\n */\n\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Handles keystrokes which are unsafe for typing. This handler's logic is explained\n * in https://github.com/ckeditor/ckeditor5-typing/issues/83#issuecomment-398690251.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport default function injectUnsafeKeystrokesHandling( editor ) {\n\tlet latestCompositionSelection = null;\n\n\tconst model = editor.model;\n\tconst view = editor.editing.view;\n\tconst inputCommand = editor.commands.get( 'input' );\n\n\t// For Android, we want to handle keystrokes on `beforeinput` to be sure that code in `DeleteObserver` already had a chance to be fired.\n\tif ( env.isAndroid ) {\n\t\tview.document.on( 'beforeinput', ( evt, evtData ) => handleUnsafeKeystroke( evtData ), { priority: 'lowest' } );\n\t} else {\n\t\tview.document.on( 'keydown', ( evt, evtData ) => handleUnsafeKeystroke( evtData ), { priority: 'lowest' } );\n\t}\n\n\tview.document.on( 'compositionstart', handleCompositionStart, { priority: 'lowest' } );\n\n\tview.document.on( 'compositionend', () => {\n\t\tlatestCompositionSelection = model.createSelection( model.document.selection );\n\t}, { priority: 'lowest' } );\n\n\t// Handles the keydown event. We need to guess whether such keystroke is going to result\n\t// in typing. If so, then before character insertion happens, any selected content needs\n\t// to be deleted. Otherwise the default browser deletion mechanism would be\n\t// triggered, resulting in:\n\t//\n\t// * Hundreds of mutations which could not be handled.\n\t// * But most importantly, loss of control over how the content is being deleted.\n\t//\n\t// The method is used in a low-priority listener, hence allowing other listeners (e.g. delete or enter features)\n\t// to handle the event.\n\t//\n\t// @param {module:engine/view/observer/keyobserver~KeyEventData} evtData\n\tfunction handleUnsafeKeystroke( evtData ) {\n\t\tconst doc = model.document;\n\t\tconst isComposing = view.document.isComposing;\n\t\tconst isSelectionUnchanged = latestCompositionSelection && latestCompositionSelection.isEqual( doc.selection );\n\n\t\t// Reset stored composition selection.\n\t\tlatestCompositionSelection = null;\n\n\t\t// By relying on the state of the input command we allow disabling the entire input easily\n\t\t// by just disabling the input command. We could’ve used here the delete command but that\n\t\t// would mean requiring the delete feature which would block loading one without the other.\n\t\t// We could also check the editor.isReadOnly property, but that wouldn't allow to block\n\t\t// the input without blocking other features.\n\t\tif ( !inputCommand.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( isSafeKeystroke( evtData ) || doc.selection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If during composition, deletion should be prevented as it may remove composed sequence (#83).\n\t\tif ( isComposing && evtData.keyCode === 229 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If there is a `keydown` event fired with '229' keycode it might be related\n\t\t// to recent composition. Check if selection is the same as upon ending recent composition,\n\t\t// if so do not remove selected content as it will remove composed sequence (#83).\n\t\tif ( !isComposing && evtData.keyCode === 229 && isSelectionUnchanged ) {\n\t\t\treturn;\n\t\t}\n\n\t\tdeleteSelectionContent();\n\t}\n\n\t// Handles the `compositionstart` event. It is used only in special cases to remove the contents\n\t// of a non-collapsed selection so composition itself does not result in complex mutations.\n\t//\n\t// The special case mentioned above is a situation in which the `keydown` event is fired after\n\t// `compositionstart` event. In such cases {@link #handleKeydown} cannot clear current selection\n\t// contents (because it is too late and will break the composition) so the composition handler takes care of it.\n\tfunction handleCompositionStart() {\n\t\tconst doc = model.document;\n\t\tconst isFlatSelection = doc.selection.rangeCount === 1 ? doc.selection.getFirstRange().isFlat : true;\n\n\t\t// If on `compositionstart` there is a non-collapsed selection which start and end have different parents\n\t\t// it means the `handleKeydown()` method did not remove its contents. It happens usually because\n\t\t// of different order of events (`compositionstart` before `keydown` - in Safari). In such cases\n\t\t// we need to remove selection contents on composition start (#83).\n\t\tif ( doc.selection.isCollapsed || isFlatSelection ) {\n\t\t\treturn;\n\t\t}\n\n\t\tdeleteSelectionContent();\n\t}\n\n\tfunction deleteSelectionContent() {\n\t\tconst buffer = inputCommand.buffer;\n\n\t\tbuffer.lock();\n\n\t\tmodel.enqueueChange( buffer.batch, () => {\n\t\t\tmodel.deleteContent( model.document.selection );\n\t\t} );\n\n\t\tbuffer.unlock();\n\t}\n}\n\nconst safeKeycodes = [\n\tgetCode( 'arrowUp' ),\n\tgetCode( 'arrowRight' ),\n\tgetCode( 'arrowDown' ),\n\tgetCode( 'arrowLeft' ),\n\t9, // Tab\n\t16, // Shift\n\t17, // Ctrl\n\t18, // Alt\n\t19, // Pause\n\t20, // CapsLock\n\t27, // Escape\n\t33, // PageUp\n\t34, // PageDown\n\t35, // Home\n\t36, // End,\n\t45, // Insert,\n\t91, // Windows,\n\t93, // Menu key,\n\t144, // NumLock\n\t145, // ScrollLock,\n\t173, // Mute/Unmute\n\t174, // Volume up\n\t175, // Volume down,\n\t176, // Next song,\n\t177, // Previous song,\n\t178, // Stop,\n\t179, // Play/Pause,\n\t255 // Display brightness (increase and decrease)\n];\n\n// Function keys.\nfor ( let code = 112; code <= 135; code++ ) {\n\tsafeKeycodes.push( code );\n}\n\n// Returns `true` if a keystroke should not cause any content change caused by \"typing\".\n//\n// Note: This implementation is very simple and will need to be refined with time.\n//\n// @private\n// @param {engine.view.observer.keyObserver.KeyEventData} keyData\n// @returns {Boolean}\nfunction isSafeKeystroke( keyData ) {\n\t// Keystrokes which contain Ctrl don't represent typing.\n\tif ( keyData.ctrlKey ) {\n\t\treturn true;\n\t}\n\n\treturn safeKeycodes.includes( keyData.keyCode );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module enter/shiftenter\n */\n\nimport ShiftEnterCommand from './shiftentercommand';\nimport EnterObserver from './enterobserver';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * This plugin handles the <kbd>Shift</kbd>+<kbd>Enter</kbd> keystroke (soft line break) in the editor.\n *\n * See also the {@link module:enter/enter~Enter} plugin.\n *\n * For more information about this feature see the {@glink api/enter package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ShiftEnter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ShiftEnter';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\t\tconst conversion = editor.conversion;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t// Configure the schema.\n\t\tschema.register( 'softBreak', {\n\t\t\tallowWhere: '$text',\n\t\t\tisInline: true\n\t\t} );\n\n\t\t// Configure converters.\n\t\tconversion.for( 'upcast' )\n\t\t\t.elementToElement( {\n\t\t\t\tmodel: 'softBreak',\n\t\t\t\tview: 'br'\n\t\t\t} );\n\n\t\tconversion.for( 'downcast' )\n\t\t\t.elementToElement( {\n\t\t\t\tmodel: 'softBreak',\n\t\t\t\tview: ( modelElement, viewWriter ) => viewWriter.createEmptyElement( 'br' )\n\t\t\t} );\n\n\t\tview.addObserver( EnterObserver );\n\n\t\teditor.commands.add( 'shiftEnter', new ShiftEnterCommand( editor ) );\n\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tdata.preventDefault();\n\n\t\t\t// The hard enter key is handled by the Enter plugin.\n\t\t\tif ( !data.isSoft ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\teditor.execute( 'shiftEnter' );\n\t\t\tview.scrollToTheSelection();\n\t\t}, { priority: 'low' } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/changebuffer\n */\n\n/**\n * Change buffer allows to group atomic changes (like characters that have been typed) into\n * {@link module:engine/model/batch~Batch batches}.\n *\n * Batches represent single undo steps, hence changes added to one single batch are undone together.\n *\n * The buffer has a configurable limit of atomic changes that it can accommodate. After the limit was\n * exceeded (see {@link ~ChangeBuffer#input}), a new batch is created in {@link ~ChangeBuffer#batch}.\n *\n * To use the change buffer you need to let it know about the number of changes that were added to the batch:\n *\n *\t\tconst buffer = new ChangeBuffer( model, LIMIT );\n *\n *\t\t// Later on in your feature:\n *\t\tbuffer.batch.insert( pos, insertedCharacters );\n *\t\tbuffer.input( insertedCharacters.length );\n *\n */\nexport default class ChangeBuffer {\n\t/**\n\t * Creates a new instance of the change buffer.\n\t *\n\t * @param {module:engine/model/model~Model} model\n\t * @param {Number} [limit=20] The maximum number of atomic changes which can be contained in one batch.\n\t */\n\tconstructor( model, limit = 20 ) {\n\t\t/**\n\t\t * The model instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model} #model\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The number of atomic changes in the buffer. Once it exceeds the {@link #limit},\n\t\t * the {@link #batch batch} is set to a new one.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #size\n\t\t */\n\t\tthis.size = 0;\n\n\t\t/**\n\t\t * The maximum number of atomic changes which can be contained in one batch.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #limit\n\t\t */\n\t\tthis.limit = limit;\n\n\t\t/**\n\t\t * Whether the buffer is locked. A locked buffer cannot be reset unless it gets unlocked.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isLocked\n\t\t */\n\t\tthis.isLocked = false;\n\n\t\t// The function to be called in order to notify the buffer about batches which appeared in the document.\n\t\t// The callback will check whether it is a new batch and in that case the buffer will be flushed.\n\t\t//\n\t\t// The reason why the buffer needs to be flushed whenever a new batch appears is that the changes added afterwards\n\t\t// should be added to a new batch. For instance, when the user types, then inserts an image, and then types again,\n\t\t// the characters typed after inserting the image should be added to a different batch than the characters typed before.\n\t\tthis._changeCallback = ( evt, batch ) => {\n\t\t\tif ( batch.type != 'transparent' && batch !== this._batch ) {\n\t\t\t\tthis._reset( true );\n\t\t\t}\n\t\t};\n\n\t\tthis._selectionChangeCallback = () => {\n\t\t\tthis._reset();\n\t\t};\n\n\t\tthis.model.document.on( 'change', this._changeCallback );\n\n\t\tthis.model.document.selection.on( 'change:range', this._selectionChangeCallback );\n\t\tthis.model.document.selection.on( 'change:attribute', this._selectionChangeCallback );\n\n\t\t/**\n\t\t * The current batch instance.\n\t\t *\n\t\t * @private\n\t\t * @member #_batch\n\t\t */\n\n\t\t/**\n\t\t * The callback to document the change event which later needs to be removed.\n\t\t *\n\t\t * @private\n\t\t * @member #_changeCallback\n\t\t */\n\n\t\t/**\n\t\t * The callback to document selection `change:attribute` and `change:range` events which resets the buffer.\n\t\t *\n\t\t * @private\n\t\t * @member #_selectionChangeCallback\n\t\t */\n\t}\n\n\t/**\n\t * The current batch to which a feature should add its operations. Once the {@link #size}\n\t * is reached or exceeds the {@link #limit}, the batch is set to a new instance and the size is reset.\n\t *\n\t * @type {module:engine/model/batch~Batch}\n\t */\n\tget batch() {\n\t\tif ( !this._batch ) {\n\t\t\tthis._batch = this.model.createBatch();\n\t\t}\n\n\t\treturn this._batch;\n\t}\n\n\t/**\n\t * The input number of changes into the buffer. Once the {@link #size} is\n\t * reached or exceeds the {@link #limit}, the batch is set to a new instance and the size is reset.\n\t *\n\t * @param {Number} changeCount The number of atomic changes to input.\n\t */\n\tinput( changeCount ) {\n\t\tthis.size += changeCount;\n\n\t\tif ( this.size >= this.limit ) {\n\t\t\tthis._reset( true );\n\t\t}\n\t}\n\n\t/**\n\t * Locks the buffer.\n\t */\n\tlock() {\n\t\tthis.isLocked = true;\n\t}\n\n\t/**\n\t * Unlocks the buffer.\n\t */\n\tunlock() {\n\t\tthis.isLocked = false;\n\t}\n\n\t/**\n\t * Destroys the buffer.\n\t */\n\tdestroy() {\n\t\tthis.model.document.off( 'change', this._changeCallback );\n\t\tthis.model.document.selection.off( 'change:range', this._selectionChangeCallback );\n\t\tthis.model.document.selection.off( 'change:attribute', this._selectionChangeCallback );\n\t}\n\n\t/**\n\t * Resets the change buffer.\n\t *\n\t * @private\n\t * @param {Boolean} [ignoreLock] Whether internal lock {@link #isLocked} should be ignored.\n\t */\n\t_reset( ignoreLock ) {\n\t\tif ( !this.isLocked || ignoreLock ) {\n\t\t\tthis._batch = null;\n\t\t\tthis.size = 0;\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/inputcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport ChangeBuffer from './utils/changebuffer';\n\n/**\n * The input command. Used by the {@link module:typing/input~Input input feature} to handle typing.\n *\n * @extends module:core/command~Command\n */\nexport default class InputCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {Number} undoStepSize The maximum number of atomic changes\n\t * which can be contained in one batch in the command buffer.\n\t */\n\tconstructor( editor, undoStepSize ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Typing's change buffer used to group subsequent changes into batches.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {module:typing/utils/changebuffer~ChangeBuffer} #_buffer\n\t\t */\n\t\tthis._buffer = new ChangeBuffer( editor.model, undoStepSize );\n\n\t\t/**\n\t\t * Stores batches created by the input command. The batches are used to differentiate input batches from other batches using\n\t\t * {@link module:typing/input~Input#isInput} method.\n\t\t *\n\t\t * @type {WeakSet<module:engine/model/batch~Batch>}\n\t\t * @protected\n\t\t */\n\t\tthis._batches = new WeakSet();\n\t}\n\n\t/**\n\t * The current change buffer.\n\t *\n\t * @type {module:typing/utils/changebuffer~ChangeBuffer}\n\t */\n\tget buffer() {\n\t\treturn this._buffer;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._buffer.destroy();\n\t}\n\n\t/**\n\t * Executes the input command. It replaces the content within the given range with the given text.\n\t * Replacing is a two step process, first the content within the range is removed and then the new text is inserted\n\t * at the beginning of the range (which after the removal is a collapsed range).\n\t *\n\t * @fires execute\n\t * @param {Object} [options] The command options.\n\t * @param {String} [options.text=''] The text to be inserted.\n\t * @param {module:engine/model/range~Range} [options.range] The range in which the text is inserted. Defaults\n\t * to the first range in the current selection.\n\t * @param {module:engine/model/range~Range} [options.resultRange] The range where the selection\n\t * should be placed after the insertion. If not specified, the selection will be placed right after\n\t * the inserted text.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst text = options.text || '';\n\t\tconst textInsertions = text.length;\n\t\tconst range = options.range || doc.selection.getFirstRange();\n\t\tconst resultRange = options.resultRange;\n\n\t\tmodel.enqueueChange( this._buffer.batch, writer => {\n\t\t\tconst isCollapsedRange = range.isCollapsed;\n\n\t\t\tthis._buffer.lock();\n\n\t\t\tmodel.deleteContent( model.createSelection( range ) );\n\n\t\t\tif ( text ) {\n\t\t\t\tmodel.insertContent( writer.createText( text, doc.selection.getAttributes() ), range.start );\n\t\t\t}\n\n\t\t\tif ( resultRange ) {\n\t\t\t\twriter.setSelection( resultRange );\n\t\t\t} else if ( isCollapsedRange ) {\n\t\t\t\t// If range was collapsed just shift the selection by the number of inserted characters.\n\t\t\t\twriter.setSelection( range.start.getShiftedBy( textInsertions ) );\n\t\t\t}\n\n\t\t\tthis._buffer.unlock();\n\n\t\t\tthis._buffer.input( textInsertions );\n\n\t\t\t// Store the batch as an 'input' batch for the Input.isInput( batch ) check.\n\t\t\tthis._batches.add( this._buffer.batch );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/utils\n */\n\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport diffToChanges from '@ckeditor/ckeditor5-utils/src/difftochanges';\n\n/**\n * Returns true if container children have mutated or more than a single text node was changed.\n *\n * @private\n * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n * @returns {Boolean}\n */\nexport function containerChildrenMutated( mutations ) {\n\tif ( mutations.length == 0 ) {\n\t\treturn false;\n\t}\n\n\t// Check if there is any mutation of `children` type or any mutation that changes more than one text node.\n\tfor ( const mutation of mutations ) {\n\t\tif ( mutation.type === 'children' && !getSingleTextNodeChange( mutation ) ) {\n\t\t\treturn true;\n\t\t}\n\t}\n\n\treturn false;\n}\n\n/**\n * Returns change made to a single text node.\n *\n * @private\n * @param {module:engine/view/observer/mutationobserver~MutatedText|\n * module:engine/view/observer/mutationobserver~MutatedChildren} mutation\n * @returns {Object|undefined} Change object (see {@link module:utils/difftochanges~diffToChanges} output)\n * or undefined if more than a single text node was changed.\n */\nexport function getSingleTextNodeChange( mutation ) {\n\t// One new node.\n\tif ( mutation.newChildren.length - mutation.oldChildren.length != 1 ) {\n\t\treturn;\n\t}\n\n\t// Which is text.\n\tconst diffResult = diff( mutation.oldChildren, mutation.newChildren, compareChildNodes );\n\tconst changes = diffToChanges( diffResult, mutation.newChildren );\n\n\t// In case of [ delete, insert, insert ] the previous check will not exit.\n\tif ( changes.length > 1 ) {\n\t\treturn;\n\t}\n\n\tconst change = changes[ 0 ];\n\n\t// Which is text.\n\tif ( !( !!change.values[ 0 ] && change.values[ 0 ].is( 'text' ) ) ) {\n\t\treturn;\n\t}\n\n\treturn change;\n}\n\n/**\n * Checks whether two view nodes are identical, which means they are the same object\n * or contain exactly same data (in case of text nodes).\n *\n * @private\n * @param {module:engine/view/node~Node} oldChild\n * @param {module:engine/view/node~Node} newChild\n * @returns {Boolean}\n */\nexport function compareChildNodes( oldChild, newChild ) {\n\tif ( !!oldChild && oldChild.is( 'text' ) && !!newChild && newChild.is( 'text' ) ) {\n\t\treturn oldChild.data === newChild.data;\n\t} else {\n\t\treturn oldChild === newChild;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/difftochanges\n */\n\n/**\n * Creates a set of changes which need to be applied to the input in order to transform\n * it into the output. This function can be used with strings or arrays.\n *\n *\t\tconst input = Array.from( 'abc' );\n *\t\tconst output = Array.from( 'xaby' );\n *\t\tconst changes = diffToChanges( diff( input, output ), output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput.splice( change.index, 0, ...change.values );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput.splice( change.index, change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\tinput.join( '' ) == output.join( '' ); // -> true\n *\n * @param {Array.<'equal'|'insert'|'delete'>} diff Result of {@link module:utils/diff~diff}.\n * @param {String|Array} output The string or array which was passed as diff's output.\n * @returns {Array.<Object>} Set of changes (insert or delete) which need to be applied to the input\n * in order to transform it into the output.\n */\nexport default function diffToChanges( diff, output ) {\n\tconst changes = [];\n\tlet index = 0;\n\tlet lastOperation;\n\n\tdiff.forEach( change => {\n\t\tif ( change == 'equal' ) {\n\t\t\tpushLast();\n\n\t\t\tindex++;\n\t\t} else if ( change == 'insert' ) {\n\t\t\tif ( isContinuationOf( 'insert' ) ) {\n\t\t\t\tlastOperation.values.push( output[ index ] );\n\t\t\t} else {\n\t\t\t\tpushLast();\n\n\t\t\t\tlastOperation = {\n\t\t\t\t\ttype: 'insert',\n\t\t\t\t\tindex,\n\t\t\t\t\tvalues: [ output[ index ] ]\n\t\t\t\t};\n\t\t\t}\n\n\t\t\tindex++;\n\t\t} else /* if ( change == 'delete' ) */ {\n\t\t\tif ( isContinuationOf( 'delete' ) ) {\n\t\t\t\tlastOperation.howMany++;\n\t\t\t} else {\n\t\t\t\tpushLast();\n\n\t\t\t\tlastOperation = {\n\t\t\t\t\ttype: 'delete',\n\t\t\t\t\tindex,\n\t\t\t\t\thowMany: 1\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\t} );\n\n\tpushLast();\n\n\treturn changes;\n\n\tfunction pushLast() {\n\t\tif ( lastOperation ) {\n\t\t\tchanges.push( lastOperation );\n\t\t\tlastOperation = null;\n\t\t}\n\t}\n\n\tfunction isContinuationOf( expected ) {\n\t\treturn lastOperation && lastOperation.type == expected;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/injecttypingmutationshandling\n */\n\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport DomConverter from '@ckeditor/ckeditor5-engine/src/view/domconverter';\n\nimport { getSingleTextNodeChange, containerChildrenMutated } from './utils';\n\n/**\n * Handles mutations caused by normal typing.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport default function injectTypingMutationsHandling( editor ) {\n\teditor.editing.view.document.on( 'mutations', ( evt, mutations, viewSelection ) => {\n\t\tnew MutationHandler( editor ).handle( mutations, viewSelection );\n\t} );\n}\n\n/**\n * Helper class for translating DOM mutations into model changes.\n *\n * @private\n */\nclass MutationHandler {\n\t/**\n\t * Creates an instance of the mutation handler.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * Editor instance for which mutations are handled.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * The editing controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/controller/editingcontroller~EditingController} #editing\n\t\t */\n\t\tthis.editing = this.editor.editing;\n\t}\n\n\t/**\n\t * Handles given mutations.\n\t *\n\t * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n\t * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n\t * @param {module:engine/view/selection~Selection|null} viewSelection\n\t */\n\thandle( mutations, viewSelection ) {\n\t\tif ( containerChildrenMutated( mutations ) ) {\n\t\t\tthis._handleContainerChildrenMutations( mutations, viewSelection );\n\t\t} else {\n\t\t\tfor ( const mutation of mutations ) {\n\t\t\t\t// Fortunately it will never be both.\n\t\t\t\tthis._handleTextMutation( mutation, viewSelection );\n\t\t\t\tthis._handleTextNodeInsertion( mutation );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Handles situations when container's children mutated during input. This can happen when\n\t * the browser is trying to \"fix\" DOM in certain situations. For example, when the user starts to type\n\t * in `<p><a href=\"\"><i>Link{}</i></a></p>`, the browser might change the order of elements\n\t * to `<p><i><a href=\"\">Link</a>x{}</i></p>`. A similar situation happens when the spell checker\n\t * replaces a word wrapped with `<strong>` with a word wrapped with a `<b>` element.\n\t *\n\t * To handle such situations, the common DOM ancestor of all mutations is converted to the model representation\n\t * and then compared with the current model to calculate the proper text change.\n\t *\n\t * Note: Single text node insertion is handled in {@link #_handleTextNodeInsertion} and text node mutation is handled\n\t * in {@link #_handleTextMutation}).\n\t *\n\t * @private\n\t * @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n\t * module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n\t * @param {module:engine/view/selection~Selection|null} viewSelection\n\t */\n\t_handleContainerChildrenMutations( mutations, viewSelection ) {\n\t\t// Get common ancestor of all mutations.\n\t\tconst mutationsCommonAncestor = getMutationsContainer( mutations );\n\n\t\t// Quit if there is no common ancestor.\n\t\tif ( !mutationsCommonAncestor ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.editor.editing.view.domConverter;\n\n\t\t// Get common ancestor in DOM.\n\t\tconst domMutationCommonAncestor = domConverter.mapViewToDom( mutationsCommonAncestor );\n\n\t\t// Create fresh DomConverter so it will not use existing mapping and convert current DOM to model.\n\t\t// This wouldn't be needed if DomConverter would allow to create fresh view without checking any mappings.\n\t\tconst freshDomConverter = new DomConverter();\n\t\tconst modelFromCurrentDom = this.editor.data.toModel(\n\t\t\tfreshDomConverter.domToView( domMutationCommonAncestor )\n\t\t).getChild( 0 );\n\n\t\t// Current model.\n\t\tconst currentModel = this.editor.editing.mapper.toModelElement( mutationsCommonAncestor );\n\n\t\t// If common ancestor is not mapped, do not do anything. It probably is a parent of another view element.\n\t\t// That means that we would need to diff model elements (see `if` below). Better return early instead of\n\t\t// trying to get a reasonable model ancestor. It will fell into the `if` below anyway.\n\t\t// This situation happens for example for lists. If `<ul>` is a common ancestor, `currentModel` is `undefined`\n\t\t// because `<ul>` is not mapped (`<li>`s are).\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/718.\n\t\tif ( !currentModel ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Get children from both ancestors.\n\t\tconst modelFromDomChildren = Array.from( modelFromCurrentDom.getChildren() );\n\t\tconst currentModelChildren = Array.from( currentModel.getChildren() );\n\n\t\t// Remove the last `<softBreak>` from the end of `modelFromDomChildren` if there is no `<softBreak>` in current model.\n\t\t// If the described scenario happened, it means that this is a bogus `<br />` added by a browser.\n\t\tconst lastDomChild = modelFromDomChildren[ modelFromDomChildren.length - 1 ];\n\t\tconst lastCurrentChild = currentModelChildren[ currentModelChildren.length - 1 ];\n\n\t\tif ( lastDomChild && lastDomChild.is( 'softBreak' ) && lastCurrentChild && !lastCurrentChild.is( 'softBreak' ) ) {\n\t\t\tmodelFromDomChildren.pop();\n\t\t}\n\n\t\tconst schema = this.editor.model.schema;\n\n\t\t// Skip situations when common ancestor has any container elements.\n\t\tif ( !isSafeForTextMutation( modelFromDomChildren, schema ) || !isSafeForTextMutation( currentModelChildren, schema ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Replace   inserted by the browser with normal space. See comment in `_handleTextMutation`.\n\t\t// Replace non-texts with any character. This is potentially dangerous but passes in manual tests. The thing is\n\t\t// that we need to take care of proper indexes so we cannot simply remove non-text elements from the content.\n\t\t// By inserting a character we keep all the real texts on their indexes.\n\t\tconst newText = modelFromDomChildren.map( item => item.is( 'text' ) ? item.data : '@' ).join( '' ).replace( /\\u00A0/g, ' ' );\n\t\tconst oldText = currentModelChildren.map( item => item.is( 'text' ) ? item.data : '@' ).join( '' ).replace( /\\u00A0/g, ' ' );\n\n\t\t// Do nothing if mutations created same text.\n\t\tif ( oldText === newText ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst diffResult = diff( oldText, newText );\n\n\t\tconst { firstChangeAt, insertions, deletions } = calculateChanges( diffResult );\n\n\t\t// Try setting new model selection according to passed view selection.\n\t\tlet modelSelectionRange = null;\n\n\t\tif ( viewSelection ) {\n\t\t\tmodelSelectionRange = this.editing.mapper.toModelRange( viewSelection.getFirstRange() );\n\t\t}\n\n\t\tconst insertText = newText.substr( firstChangeAt, insertions );\n\t\tconst removeRange = this.editor.model.createRange(\n\t\t\tthis.editor.model.createPositionAt( currentModel, firstChangeAt ),\n\t\t\tthis.editor.model.createPositionAt( currentModel, firstChangeAt + deletions )\n\t\t);\n\n\t\tthis.editor.execute( 'input', {\n\t\t\ttext: insertText,\n\t\t\trange: removeRange,\n\t\t\tresultRange: modelSelectionRange\n\t\t} );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_handleTextMutation( mutation, viewSelection ) {\n\t\tif ( mutation.type != 'text' ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Replace   inserted by the browser with normal space.\n\t\t// We want only normal spaces in the model and in the view. Renderer and DOM Converter will be then responsible\n\t\t// for rendering consecutive spaces using  , but the model and the view has to be clear.\n\t\t// Other feature may introduce inserting non-breakable space on specific key stroke (for example shift + space).\n\t\t// However then it will be handled outside of mutations, like enter key is.\n\t\t// The replacing is here because it has to be done before `diff` and `diffToChanges` functions, as they\n\t\t// take `newText` and compare it to (cleaned up) view.\n\t\t// It could also be done in mutation observer too, however if any outside plugin would like to\n\t\t// introduce additional events for mutations, they would get already cleaned up version (this may be good or not).\n\t\tconst newText = mutation.newText.replace( /\\u00A0/g, ' ' );\n\t\t// To have correct `diffResult`, we also compare view node text data with   replaced by space.\n\t\tconst oldText = mutation.oldText.replace( /\\u00A0/g, ' ' );\n\n\t\t// Do nothing if mutations created same text.\n\t\tif ( oldText === newText ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst diffResult = diff( oldText, newText );\n\n\t\tconst { firstChangeAt, insertions, deletions } = calculateChanges( diffResult );\n\n\t\t// Try setting new model selection according to passed view selection.\n\t\tlet modelSelectionRange = null;\n\n\t\tif ( viewSelection ) {\n\t\t\tmodelSelectionRange = this.editing.mapper.toModelRange( viewSelection.getFirstRange() );\n\t\t}\n\n\t\t// Get the position in view and model where the changes will happen.\n\t\tconst viewPos = this.editing.view.createPositionAt( mutation.node, firstChangeAt );\n\t\tconst modelPos = this.editing.mapper.toModelPosition( viewPos );\n\t\tconst removeRange = this.editor.model.createRange( modelPos, modelPos.getShiftedBy( deletions ) );\n\t\tconst insertText = newText.substr( firstChangeAt, insertions );\n\n\t\tthis.editor.execute( 'input', {\n\t\t\ttext: insertText,\n\t\t\trange: removeRange,\n\t\t\tresultRange: modelSelectionRange\n\t\t} );\n\t}\n\n\t/**\n\t * @private\n\t */\n\t_handleTextNodeInsertion( mutation ) {\n\t\tif ( mutation.type != 'children' ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst change = getSingleTextNodeChange( mutation );\n\t\tconst viewPos = this.editing.view.createPositionAt( mutation.node, change.index );\n\t\tconst modelPos = this.editing.mapper.toModelPosition( viewPos );\n\t\tconst insertedText = change.values[ 0 ].data;\n\n\t\tthis.editor.execute( 'input', {\n\t\t\t// Replace   inserted by the browser with normal space.\n\t\t\t// See comment in `_handleTextMutation`.\n\t\t\t// In this case we don't need to do this before `diff` because we diff whole nodes.\n\t\t\t// Just change   in case there are some.\n\t\t\ttext: insertedText.replace( /\\u00A0/g, ' ' ),\n\t\t\trange: this.editor.model.createRange( modelPos )\n\t\t} );\n\t}\n}\n\n// Returns first common ancestor of all mutations that is either {@link module:engine/view/containerelement~ContainerElement}\n// or {@link module:engine/view/rootelement~RootElement}.\n//\n// @private\n// @param {Array.<module:engine/view/observer/mutationobserver~MutatedText|\n// module:engine/view/observer/mutationobserver~MutatedChildren>} mutations\n// @returns {module:engine/view/containerelement~ContainerElement|engine/view/rootelement~RootElement|undefined}\nfunction getMutationsContainer( mutations ) {\n\tconst lca = mutations\n\t\t.map( mutation => mutation.node )\n\t\t.reduce( ( commonAncestor, node ) => {\n\t\t\treturn commonAncestor.getCommonAncestor( node, { includeSelf: true } );\n\t\t} );\n\n\tif ( !lca ) {\n\t\treturn;\n\t}\n\n\t// We need to look for container and root elements only, so check all LCA's\n\t// ancestors (starting from itself).\n\treturn lca.getAncestors( { includeSelf: true, parentFirst: true } )\n\t\t.find( element => element.is( 'containerElement' ) || element.is( 'rootElement' ) );\n}\n\n// Returns true if provided array contains content that won't be problematic during diffing and text mutation handling.\n//\n// @param {Array.<module:engine/model/node~Node>} children\n// @param {module:engine/model/schema~Schema} schema\n// @returns {Boolean}\nfunction isSafeForTextMutation( children, schema ) {\n\treturn children.every( child => schema.isInline( child ) );\n}\n\n// Calculates first change index and number of characters that should be inserted and deleted starting from that index.\n//\n// @private\n// @param diffResult\n// @returns {{insertions: number, deletions: number, firstChangeAt: *}}\nfunction calculateChanges( diffResult ) {\n\t// Index where the first change happens. Used to set the position from which nodes will be removed and where will be inserted.\n\tlet firstChangeAt = null;\n\t// Index where the last change happens. Used to properly count how many characters have to be removed and inserted.\n\tlet lastChangeAt = null;\n\n\t// Get `firstChangeAt` and `lastChangeAt`.\n\tfor ( let i = 0; i < diffResult.length; i++ ) {\n\t\tconst change = diffResult[ i ];\n\n\t\tif ( change != 'equal' ) {\n\t\t\tfirstChangeAt = firstChangeAt === null ? i : firstChangeAt;\n\t\t\tlastChangeAt = i;\n\t\t}\n\t}\n\n\t// How many characters, starting from `firstChangeAt`, should be removed.\n\tlet deletions = 0;\n\t// How many characters, starting from `firstChangeAt`, should be inserted.\n\tlet insertions = 0;\n\n\tfor ( let i = firstChangeAt; i <= lastChangeAt; i++ ) {\n\t\t// If there is no change (equal) or delete, the character is existing in `oldText`. We count it for removing.\n\t\tif ( diffResult[ i ] != 'insert' ) {\n\t\t\tdeletions++;\n\t\t}\n\n\t\t// If there is no change (equal) or insert, the character is existing in `newText`. We count it for inserting.\n\t\tif ( diffResult[ i ] != 'delete' ) {\n\t\t\tinsertions++;\n\t\t}\n\t}\n\n\treturn { insertions, deletions, firstChangeAt };\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/input\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport InputCommand from './inputcommand';\n\nimport injectUnsafeKeystrokesHandling from './utils/injectunsafekeystrokeshandling';\nimport injectTypingMutationsHandling from './utils/injecttypingmutationshandling';\n\n/**\n * Handles text input coming from the keyboard or other input methods.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Input extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Input';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// TODO The above default configuration value should be defined using editor.config.define() once it's fixed.\n\t\tconst inputCommand = new InputCommand( editor, editor.config.get( 'typing.undoStep' ) || 20 );\n\n\t\teditor.commands.add( 'input', inputCommand );\n\n\t\tinjectUnsafeKeystrokesHandling( editor );\n\t\tinjectTypingMutationsHandling( editor );\n\t}\n\n\t/**\n\t * Checks batch if it is a result of user input - e.g. typing.\n\t *\n\t *\t\tconst input = editor.plugins.get( 'Input' );\n\t *\n\t *\t\teditor.model.document.on( 'change:data', ( evt, batch ) => {\n\t *\t\t\tif ( input.isTyping( batch ) ) {\n\t *\t\t\t\tconsole.log( 'The user typed something...' );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * **Note:** This method checks if the batch was created using {@link module:typing/inputcommand~InputCommand 'input'}\n\t * command as typing changes coming from user input are inserted to the document using that command.\n\t *\n\t * @param {module:engine/model/batch~Batch} batch A batch to check.\n\t * @returns {Boolean}\n\t */\n\tisInput( batch ) {\n\t\tconst inputCommand = this.editor.commands.get( 'input' );\n\n\t\treturn inputCommand._batches.has( batch );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/deletecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport count from '@ckeditor/ckeditor5-utils/src/count';\n\nimport ChangeBuffer from './utils/changebuffer';\n\n/**\n * The delete command. Used by the {@link module:typing/delete~Delete delete feature} to handle the <kbd>Delete</kbd> and\n * <kbd>Backspace</kbd> keys.\n *\n * @extends module:core/command~Command\n */\nexport default class DeleteCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {'forward'|'backward'} direction The directionality of the delete describing in what direction it\n\t * should consume the content when the selection is collapsed.\n\t */\n\tconstructor( editor, direction ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The directionality of the delete describing in what direction it should\n\t\t * consume the content when the selection is collapsed.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'forward'|'backward'} #direction\n\t\t */\n\t\tthis.direction = direction;\n\n\t\t/**\n\t\t * Delete's change buffer used to group subsequent changes into batches.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {typing.ChangeBuffer} #buffer\n\t\t */\n\t\tthis._buffer = new ChangeBuffer( editor.model, editor.config.get( 'typing.undoStep' ) );\n\t}\n\n\t/**\n\t * The current change buffer.\n\t *\n\t * @type {module:typing/utils/changebuffer~ChangeBuffer}\n\t */\n\tget buffer() {\n\t\treturn this._buffer;\n\t}\n\n\t/**\n\t * Executes the delete command. Depending on whether the selection is collapsed or not, deletes its content\n\t * or a piece of content in the {@link #direction defined direction}.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] The command options.\n\t * @param {'character'} [options.unit='character'] See {@link module:engine/model/utils/modifyselection~modifySelection}'s options.\n\t * @param {Number} [options.sequence=1] A number describing which subsequent delete event it is without the key being released.\n\t * See the {@link module:engine/view/document~Document#event:delete} event data.\n\t * @param {module:engine/model/selection~Selection} [options.selection] Selection to remove. If not set, current model selection\n\t * will be used.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tmodel.enqueueChange( this._buffer.batch, writer => {\n\t\t\tthis._buffer.lock();\n\n\t\t\tconst selection = writer.createSelection( options.selection || doc.selection );\n\n\t\t\t// Do not replace the whole selected content if selection was collapsed.\n\t\t\t// This prevents such situation:\n\t\t\t//\n\t\t\t// <h1></h1><p>[]</p>\t--> <h1>[</h1><p>]</p> \t\t--> <p></p>\n\t\t\t// starting content\t\t--> after `modifySelection`\t--> after `deleteContent`.\n\t\t\tconst doNotResetEntireContent = selection.isCollapsed;\n\n\t\t\t// Try to extend the selection in the specified direction.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tmodel.modifySelection( selection, { direction: this.direction, unit: options.unit } );\n\t\t\t}\n\n\t\t\t// Check if deleting in an empty editor. See #61.\n\t\t\tif ( this._shouldEntireContentBeReplacedWithParagraph( options.sequence || 1 ) ) {\n\t\t\t\tthis._replaceEntireContentWithParagraph( writer );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If selection is still collapsed, then there's nothing to delete.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tlet changeCount = 0;\n\n\t\t\tselection.getFirstRange().getMinimalFlatRanges().forEach( range => {\n\t\t\t\tchangeCount += count(\n\t\t\t\t\trange.getWalker( { singleCharacters: true, ignoreElementEnd: true, shallow: true } )\n\t\t\t\t);\n\t\t\t} );\n\n\t\t\tmodel.deleteContent( selection, { doNotResetEntireContent } );\n\t\t\tthis._buffer.input( changeCount );\n\n\t\t\twriter.setSelection( selection );\n\n\t\t\tthis._buffer.unlock();\n\t\t} );\n\t}\n\n\t/**\n\t * If the user keeps <kbd>Backspace</kbd> or <kbd>Delete</kbd> key pressed, the content of the current\n\t * editable will be cleared. However, this will not yet lead to resetting the remaining block to a paragraph\n\t * (which happens e.g. when the user does <kbd>Ctrl</kbd> + <kbd>A</kbd>, <kbd>Backspace</kbd>).\n\t *\n\t * But, if the user pressed the key in an empty editable for the first time,\n\t * we want to replace the entire content with a paragraph if:\n\t *\n\t * * the current limit element is empty,\n\t * * the paragraph is allowed in the limit element,\n\t * * the limit doesn't already have a paragraph inside.\n\t *\n\t * See https://github.com/ckeditor/ckeditor5-typing/issues/61.\n\t *\n\t * @private\n\t * @param {Number} sequence A number describing which subsequent delete event it is without the key being released.\n\t * @returns {Boolean}\n\t */\n\t_shouldEntireContentBeReplacedWithParagraph( sequence ) {\n\t\t// Does nothing if user pressed and held the \"Backspace\" or \"Delete\" key.\n\t\tif ( sequence > 1 ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst limitElement = model.schema.getLimitElement( selection );\n\n\t\t// If a collapsed selection contains the whole content it means that the content is empty\n\t\t// (from the user perspective).\n\t\tconst limitElementIsEmpty = selection.isCollapsed && selection.containsEntireContent( limitElement );\n\n\t\tif ( !limitElementIsEmpty ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !model.schema.checkChild( limitElement, 'paragraph' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst limitElementFirstChild = limitElement.getChild( 0 );\n\n\t\t// Does nothing if the limit element already contains only a paragraph.\n\t\t// We ignore the case when paragraph might have some inline elements (<p><inlineWidget>[]</inlineWidget></p>)\n\t\t// because we don't support such cases yet and it's unclear whether inlineWidget shouldn't be a limit itself.\n\t\tif ( limitElementFirstChild && limitElementFirstChild.name === 'paragraph' ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * The entire content is replaced with the paragraph. Selection is moved inside the paragraph.\n\t *\n\t * @private\n\t */\n\t_replaceEntireContentWithParagraph( writer ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst limitElement = model.schema.getLimitElement( selection );\n\t\tconst paragraph = writer.createElement( 'paragraph' );\n\n\t\twriter.remove( writer.createRangeIn( limitElement ) );\n\t\twriter.insert( paragraph, limitElement );\n\n\t\twriter.setSelection( paragraph, 0 );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/deleteobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\nimport DomEventData from '@ckeditor/ckeditor5-engine/src/view/observer/domeventdata';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Delete observer introduces the {@link module:engine/view/document~Document#event:delete} event.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DeleteObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tconst document = view.document;\n\t\tlet sequence = 0;\n\n\t\tdocument.on( 'keyup', ( evt, data ) => {\n\t\t\tif ( data.keyCode == keyCodes.delete || data.keyCode == keyCodes.backspace ) {\n\t\t\t\tsequence = 0;\n\t\t\t}\n\t\t} );\n\n\t\tdocument.on( 'keydown', ( evt, data ) => {\n\t\t\tconst deleteData = {};\n\n\t\t\tif ( data.keyCode == keyCodes.delete ) {\n\t\t\t\tdeleteData.direction = 'forward';\n\t\t\t\tdeleteData.unit = 'character';\n\t\t\t} else if ( data.keyCode == keyCodes.backspace ) {\n\t\t\t\tdeleteData.direction = 'backward';\n\t\t\t\tdeleteData.unit = 'codePoint';\n\t\t\t} else {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst hasWordModifier = env.isMac ? data.altKey : data.ctrlKey;\n\t\t\tdeleteData.unit = hasWordModifier ? 'word' : deleteData.unit;\n\t\t\tdeleteData.sequence = ++sequence;\n\n\t\t\tfireViewDeleteEvent( evt, data.domEvent, deleteData );\n\t\t} );\n\n\t\t// `beforeinput` is handled only for Android devices. Desktop Chrome and iOS are skipped because they are working fine now.\n\t\tif ( env.isAndroid ) {\n\t\t\tdocument.on( 'beforeinput', ( evt, data ) => {\n\t\t\t\t// If event type is other than `deleteContentBackward` then this is not deleting.\n\t\t\t\tif ( data.domEvent.inputType != 'deleteContentBackward' ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst deleteData = {\n\t\t\t\t\tunit: 'codepoint',\n\t\t\t\t\tdirection: 'backward',\n\t\t\t\t\tsequence: 1\n\t\t\t\t};\n\n\t\t\t\t// Android IMEs may change the DOM selection on `beforeinput` event so that the selection contains all the text\n\t\t\t\t// that the IME wants to remove. We will pass this information to `delete` event so proper part of the content is removed.\n\t\t\t\t//\n\t\t\t\t// Sometimes it is only expanding by a one character (in case of collapsed selection). In this case we don't need to\n\t\t\t\t// set a different selection to remove, it will work just fine.\n\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\tif ( domSelection.anchorNode == domSelection.focusNode && domSelection.anchorOffset + 1 != domSelection.focusOffset ) {\n\t\t\t\t\tdeleteData.selectionToRemove = view.domConverter.domSelectionToView( domSelection );\n\t\t\t\t}\n\n\t\t\t\tfireViewDeleteEvent( evt, data.domEvent, deleteData );\n\t\t\t} );\n\t\t}\n\n\t\tfunction fireViewDeleteEvent( originalEvent, domEvent, deleteData ) {\n\t\t\t// Save the event object to check later if it was stopped or not.\n\t\t\tlet event;\n\t\t\tdocument.once( 'delete', evt => ( event = evt ), { priority: Number.POSITIVE_INFINITY } );\n\n\t\t\tdocument.fire( 'delete', new DomEventData( document, domEvent, deleteData ) );\n\n\t\t\t// Stop the original event if `delete` event was stopped.\n\t\t\t// https://github.com/ckeditor/ckeditor5/issues/753\n\t\t\tif ( event && event.stop.called ) {\n\t\t\t\toriginalEvent.stop();\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {}\n}\n\n/**\n * Event fired when the user tries to delete content (e.g. presses <kbd>Delete</kbd> or <kbd>Backspace</kbd>).\n *\n * Note: This event is fired by the {@link module:typing/deleteobserver~DeleteObserver observer}\n * (usually registered by the {@link module:typing/delete~Delete delete feature}).\n *\n * @event module:engine/view/document~Document#event:delete\n * @param {module:engine/view/observer/domeventdata~DomEventData} data\n * @param {'forward'|'delete'} data.direction The direction in which the deletion should happen.\n * @param {'character'|'word'} data.unit The \"amount\" of content that should be deleted.\n * @param {Number} data.sequence A number describing which subsequent delete event it is without the key being released.\n * If it's 2 or more it means that the key was pressed and hold.\n * @param {module:engine/view/selection~Selection} [data.selectionToRemove] View selection which content should be removed. If not set,\n * current selection should be used.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/delete\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport DeleteCommand from './deletecommand';\nimport DeleteObserver from './deleteobserver';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * The delete and backspace feature. Handles the <kbd>Delete</kbd> and <kbd>Backspace</kbd> keys in the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Delete extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Delete';\n\t}\n\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\tview.addObserver( DeleteObserver );\n\n\t\teditor.commands.add( 'forwardDelete', new DeleteCommand( editor, 'forward' ) );\n\t\teditor.commands.add( 'delete', new DeleteCommand( editor, 'backward' ) );\n\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\tconst deleteCommandParams = { unit: data.unit, sequence: data.sequence };\n\n\t\t\t// If a specific (view) selection to remove was set, convert it to a model selection and set as a parameter for `DeleteCommand`.\n\t\t\tif ( data.selectionToRemove ) {\n\t\t\t\tconst modelSelection = editor.model.createSelection();\n\t\t\t\tconst ranges = [];\n\n\t\t\t\tfor ( const viewRange of data.selectionToRemove.getRanges() ) {\n\t\t\t\t\tranges.push( editor.editing.mapper.toModelRange( viewRange ) );\n\t\t\t\t}\n\n\t\t\t\tmodelSelection.setTo( ranges );\n\n\t\t\t\tdeleteCommandParams.selection = modelSelection;\n\t\t\t}\n\n\t\t\teditor.execute( data.direction == 'forward' ? 'forwardDelete' : 'delete', deleteCommandParams );\n\n\t\t\tdata.preventDefault();\n\n\t\t\tview.scrollToTheSelection();\n\t\t} );\n\n\t\t// Android IMEs have a quirk - they change DOM selection after the input changes were performed by the browser.\n\t\t// This happens on `keyup` event. Android doesn't know anything about our deletion and selection handling. Even if the selection\n\t\t// was changed during input events, IME remembers the position where the selection \"should\" be placed and moves it there.\n\t\t//\n\t\t// To prevent incorrect selection, we save the selection after deleting here and then re-set it on `keyup`. This has to be done\n\t\t// on DOM selection level, because on `keyup` the model selection is still the same as it was just after deletion, so it\n\t\t// wouldn't be changed and the fix would do nothing.\n\t\t//\n\t\tif ( env.isAndroid ) {\n\t\t\tlet domSelectionAfterDeletion = null;\n\n\t\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\tdomSelectionAfterDeletion = {\n\t\t\t\t\tanchorNode: domSelection.anchorNode,\n\t\t\t\t\tanchorOffset: domSelection.anchorOffset,\n\t\t\t\t\tfocusNode: domSelection.focusNode,\n\t\t\t\t\tfocusOffset: domSelection.focusOffset\n\t\t\t\t};\n\t\t\t}, { priority: 'lowest' } );\n\n\t\t\tthis.listenTo( viewDocument, 'keyup', ( evt, data ) => {\n\t\t\t\tif ( domSelectionAfterDeletion ) {\n\t\t\t\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\t\t\t\tdomSelection.collapse( domSelectionAfterDeletion.anchorNode, domSelectionAfterDeletion.anchorOffset );\n\t\t\t\t\tdomSelection.extend( domSelectionAfterDeletion.focusNode, domSelectionAfterDeletion.focusOffset );\n\n\t\t\t\t\tdomSelectionAfterDeletion = null;\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/typing\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Input from './input';\nimport Delete from './delete';\n\n/**\n * The typing feature. It handles typing.\n *\n * This is a \"glue\" plugin which loads the {@link module:typing/input~Input} and {@link module:typing/delete~Delete}\n * plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Typing extends Plugin {\n\tstatic get requires() {\n\t\treturn [ Input, Delete ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Typing';\n\t}\n}\n\n/**\n * The configuration of the typing features. Used by the features from the `@ckeditor/ckeditor5-typing` package.\n *\n * Read more in {@link module:typing/typing~TypingConfig}.\n *\n * @member {module:typing/typing~TypingConfig} module:core/editor/editorconfig~EditorConfig#typing\n */\n\n/**\n * The configuration of the typing features. Used by the typing features in `@ckeditor/ckeditor5-typing` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\ttyping: ... // Typing feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface TypingConfig\n */\n\n/**\n * The granularity of undo/redo for typing and deleting. The value `20` means (more or less) that a new undo step\n * is created every 20 characters are inserted or deleted.\n *\n * @member {Number} [module:typing/typing~TypingConfig#undoStep=20]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/model/operation/nooperation\n */\n\nimport Operation from './operation';\n\n/**\n * Operation which is doing nothing (\"empty operation\", \"do-nothing operation\", \"noop\"). This is an operation,\n * which when executed does not change the tree model. It still has some parameters defined for transformation purposes.\n *\n * In most cases this operation is a result of transforming operations. When transformation returns\n * {@link module:engine/model/operation/nooperation~NoOperation} it means that changes done by the transformed operation\n * have already been applied.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class NoOperation extends Operation {\n\tget type() {\n\t\treturn 'noop';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/nooperation~NoOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\treturn new NoOperation( this.baseVersion );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/nooperation~NoOperation}\n\t */\n\tgetReversed() {\n\t\treturn new NoOperation( this.baseVersion + 1 );\n\t}\n\n\t_execute() {\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'NoOperation';\n\t}\n\n\t// @if CK_DEBUG_ENGINE // toString() {\n\t// @if CK_DEBUG_ENGINE // \treturn `NoOperation( ${ this.baseVersion } )`;\n\t// @if CK_DEBUG_ENGINE // }\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport InsertOperation from './insertoperation';\nimport AttributeOperation from './attributeoperation';\nimport RenameOperation from './renameoperation';\nimport MarkerOperation from './markeroperation';\nimport MoveOperation from './moveoperation';\nimport RootAttributeOperation from './rootattributeoperation';\nimport MergeOperation from './mergeoperation';\nimport SplitOperation from './splitoperation';\nimport NoOperation from './nooperation';\nimport Range from '../range';\nimport Position from '../position';\n\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\n\nconst transformations = new Map();\n\n/**\n * @module engine/model/operation/transform\n */\n\n/**\n * Sets a transformation function to be be used to transform instances of class `OperationA` by instances of class `OperationB`.\n *\n * The `transformationFunction` is passed three parameters:\n *\n * * `a` - operation to be transformed, an instance of `OperationA`,\n * * `b` - operation to be transformed by, an instance of `OperationB`,\n * * {@link module:engine/model/operation/transform~TransformationContext `context`} - object with additional information about\n * transformation context.\n *\n * The `transformationFunction` should return transformation result, which is an array with one or multiple\n * {@link module:engine/model/operation/operation~Operation operation} instances.\n *\n * @protected\n * @param {Function} OperationA\n * @param {Function} OperationB\n * @param {Function} transformationFunction Function to use for transforming.\n */\nfunction setTransformation( OperationA, OperationB, transformationFunction ) {\n\tlet aGroup = transformations.get( OperationA );\n\n\tif ( !aGroup ) {\n\t\taGroup = new Map();\n\t\ttransformations.set( OperationA, aGroup );\n\t}\n\n\taGroup.set( OperationB, transformationFunction );\n}\n\n/**\n * Returns a previously set transformation function for transforming an instance of `OperationA` by an instance of `OperationB`.\n *\n * If no transformation was set for given pair of operations, {@link module:engine/model/operation/transform~noUpdateTransformation}\n * is returned. This means that if no transformation was set, the `OperationA` instance will not change when transformed\n * by the `OperationB` instance.\n *\n * @private\n * @param {Function} OperationA\n * @param {Function} OperationB\n * @returns {Function} Function set to transform an instance of `OperationA` by an instance of `OperationB`.\n */\nfunction getTransformation( OperationA, OperationB ) {\n\tconst aGroup = transformations.get( OperationA );\n\n\tif ( aGroup && aGroup.has( OperationB ) ) {\n\t\treturn aGroup.get( OperationB );\n\t}\n\n\treturn noUpdateTransformation;\n}\n\n/**\n * A transformation function that only clones operation to transform, without changing it.\n *\n * @private\n * @param {module:engine/model/operation/operation~Operation} a Operation to transform.\n * @returns {Array.<module:engine/model/operation/operation~Operation>}\n */\nfunction noUpdateTransformation( a ) {\n\treturn [ a ];\n}\n\n/**\n * Transforms operation `a` by operation `b`.\n *\n * @param {module:engine/model/operation/operation~Operation} a Operation to be transformed.\n * @param {module:engine/model/operation/operation~Operation} b Operation to transform by.\n * @param {module:engine/model/operation/transform~TransformationContext} context Transformation context for this transformation.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} Transformation result.\n */\nexport function transform( a, b, context = {} ) {\n\tconst transformationFunction = getTransformation( a.constructor, b.constructor );\n\n\ttry {\n\t\ta = a.clone();\n\n\t\treturn transformationFunction( a, b, context );\n\t} catch ( e ) {\n\t\t// @if CK_DEBUG // console.warn( 'Error during operation transformation!', e.message );\n\t\t// @if CK_DEBUG // console.warn( 'Transformed operation', a );\n\t\t// @if CK_DEBUG // console.warn( 'Operation transformed by', b );\n\t\t// @if CK_DEBUG // console.warn( 'context.aIsStrong', context.aIsStrong );\n\t\t// @if CK_DEBUG // console.warn( 'context.aWasUndone', context.aWasUndone );\n\t\t// @if CK_DEBUG // console.warn( 'context.bWasUndone', context.bWasUndone );\n\t\t// @if CK_DEBUG // console.warn( 'context.abRelation', context.abRelation );\n\t\t// @if CK_DEBUG // console.warn( 'context.baRelation', context.baRelation );\n\n\t\tthrow e;\n\t}\n}\n\n/**\n * Performs a transformation of two sets of operations - `operationsA` and `operationsB`. The transformation is two-way -\n * both transformed `operationsA` and transformed `operationsB` are returned.\n *\n * Note, that the first operation in each set should base on the same document state (\n * {@link module:engine/model/document~Document#version document version}).\n *\n * It is assumed that `operationsA` are \"more important\" during conflict resolution between two operations.\n *\n * New copies of both passed arrays and operations inside them are returned. Passed arguments are not altered.\n *\n * Base versions of the transformed operations sets are updated accordingly. For example, assume that base versions are `4`\n * and there are `3` operations in `operationsA` and `5` operations in `operationsB`. Then:\n *\n * * transformed `operationsA` will start from base version `9` (`4` base version + `5` operations B),\n * * transformed `operationsB` will start from base version `7` (`4` base version + `3` operations A).\n *\n * If no operation was broken into two during transformation, then both sets will end up with an operation that bases on version `11`:\n *\n * * transformed `operationsA` start from `9` and there are `3` of them, so the last will have `baseVersion` equal to `11`,\n * * transformed `operationsB` start from `7` and there are `5` of them, so the last will have `baseVersion` equal to `11`.\n *\n * @param {Array.<module:engine/model/operation/operation~Operation>} operationsA\n * @param {Array.<module:engine/model/operation/operation~Operation>} operationsB\n * @param {Object} options Additional transformation options.\n * @param {module:engine/model/document~Document|null} options.document Document which the operations change.\n * @param {Boolean} [options.useRelations=false] Whether during transformation relations should be used (used during undo for\n * better conflict resolution).\n * @param {Boolean} [options.padWithNoOps=false] Whether additional {@link module:engine/model/operation/nooperation~NoOperation}s\n * should be added to the transformation results to force the same last base version for both transformed sets (in case\n * if some operations got broken into multiple operations during transformation).\n * @returns {Object} Transformation result.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} return.operationsA Transformed `operationsA`.\n * @returns {Array.<module:engine/model/operation/operation~Operation>} return.operationsB Transformed `operationsB`.\n * @returns {Map} return.originalOperations A map that links transformed operations to original operations. The keys are the transformed\n * operations and the values are the original operations from the input (`operationsA` and `operationsB`).\n */\nexport function transformSets( operationsA, operationsB, options ) {\n\t// Create new arrays so the originally passed arguments are not changed.\n\t// No need to clone operations, they are cloned as they are transformed.\n\toperationsA = operationsA.slice();\n\toperationsB = operationsB.slice();\n\n\tconst contextFactory = new ContextFactory( options.document, options.useRelations, options.forceWeakRemove );\n\tcontextFactory.setOriginalOperations( operationsA );\n\tcontextFactory.setOriginalOperations( operationsB );\n\n\tconst originalOperations = contextFactory.originalOperations;\n\n\t// If one of sets is empty there is simply nothing to transform, so return sets as they are.\n\tif ( operationsA.length == 0 || operationsB.length == 0 ) {\n\t\treturn { operationsA, operationsB, originalOperations };\n\t}\n\t//\n\t// Following is a description of transformation process:\n\t//\n\t// There are `operationsA` and `operationsB` to be transformed, both by both.\n\t//\n\t// So, suppose we have sets of two operations each: `operationsA` = `[ a1, a2 ]`, `operationsB` = `[ b1, b2 ]`.\n\t//\n\t// Remember, that we can only transform operations that base on the same context. We assert that `a1` and `b1` base on\n\t// the same context and we transform them. Then, we get `a1'` and `b1'`. `a2` bases on a context with `a1` -- `a2`\n\t// is an operation that followed `a1`. Similarly, `b2` bases on a context with `b1`.\n\t//\n\t// However, since `a1'` is a result of transformation by `b1`, `a1'` now also has a context with `b1`. This means that\n\t// we can safely transform `a1'` by `b2`. As we finish transforming `a1`, we also transformed all `operationsB`.\n\t// All `operationsB` also have context including `a1`. Now, we can properly transform `a2` by those operations.\n\t//\n\t// The transformation process can be visualized on a transformation diagram (\"diamond diagram\"):\n\t//\n\t// [the initial state]\n\t// [common for a1 and b1]\n\t//\n\t// *\n\t// / \\\n\t// / \\\n\t// b1 a1\n\t// / \\\n\t// / \\\n\t// * *\n\t// / \\ / \\\n\t// / \\ / \\\n\t// b2 a1' b1' a2\n\t// / \\ / \\\n\t// / \\ / \\\n\t// * * *\n\t// \\ / \\ /\n\t// \\ / \\ /\n\t// a1'' b2' a2' b1''\n\t// \\ / \\ /\n\t// \\ / \\ /\n\t// * *\n\t// \\ /\n\t// \\ /\n\t// a2'' b2''\n\t// \\ /\n\t// \\ /\n\t// *\n\t//\n\t// [the final state]\n\t//\n\t// The final state can be reached from the initial state by applying `a1`, `a2`, `b1''` and `b2''`, as well as by\n\t// applying `b1`, `b2`, `a1''`, `a2''`. Note how the operations get to a proper common state before each pair is\n\t// transformed.\n\t//\n\t// Another thing to consider is that an operation during transformation can be broken into multiple operations.\n\t// Suppose that `a1` * `b1` = `[ a11', a12' ]` (instead of `a1'` that we considered previously).\n\t//\n\t// In that case, we leave `a12'` for later and we continue transforming `a11'` until it is transformed by all `operationsB`\n\t// (in our case it is just `b2`). At this point, `b1` is transformed by \"whole\" `a1`, while `b2` is only transformed\n\t// by `a11'`. Similarly, `a12'` is only transformed by `b1`. This leads to a conclusion that we need to start transforming `a12'`\n\t// from the moment just after it was broken. So, `a12'` is transformed by `b2`. Now, \"the whole\" `a1` is transformed\n\t// by `operationsB`, while all `operationsB` are transformed by \"the whole\" `a1`. This means that we can continue with\n\t// following `operationsA` (in our case it is just `a2`).\n\t//\n\t// Of course, also `operationsB` can be broken. However, since we focus on transforming operation `a` to the end,\n\t// the only thing to do is to store both pieces of operation `b`, so that the next transformed operation `a` will\n\t// be transformed by both of them.\n\t//\n\t// *\n\t// / \\\n\t// / \\\n\t// / \\\n\t// b1 a1\n\t// / \\\n\t// / \\\n\t// / \\\n\t// * *\n\t// / \\ / \\\n\t// / a11' / \\\n\t// / \\ / \\\n\t// b2 * b1' a2\n\t// / / \\ / \\\n\t// / / a12' / \\\n\t// / / \\ / \\\n\t// * b2' * *\n\t// \\ / / \\ /\n\t// a11'' / b21'' \\ /\n\t// \\ / / \\ /\n\t// * * a2' b1''\n\t// \\ / \\ \\ /\n\t// a12'' b22''\\ \\ /\n\t// \\ / \\ \\ /\n\t// * a2'' *\n\t// \\ \\ /\n\t// \\ \\ b21'''\n\t// \\ \\ /\n\t// a2''' *\n\t// \\ /\n\t// \\ b22'''\n\t// \\ /\n\t// *\n\t//\n\t// Note, how `a1` is broken and transformed into `a11'` and `a12'`, while `b2'` got broken and transformed into `b21''` and `b22''`.\n\t//\n\t// Having all that on mind, here is an outline for the transformation process algorithm:\n\t//\n\t// 1. We have `operationsA` and `operationsB` array, which we dynamically update as the transformation process goes.\n\t//\n\t// 2. We take next (or first) operation from `operationsA` and check from which operation `b` we need to start transforming it.\n\t// All original `operationsA` are set to be transformed starting from the first operation `b`.\n\t//\n\t// 3. We take operations from `operationsB`, one by one, starting from the correct one, and transform operation `a`\n\t// by operation `b` (and vice versa). We update `operationsA` and `operationsB` by replacing the original operations\n\t// with the transformation results.\n\t//\n\t// 4. If operation is broken into multiple operations, we save all the new operations in the place of the\n\t// original operation.\n\t//\n\t// 5. Additionally, if operation `a` was broken, for the \"new\" operation, we remember from which operation `b` it should\n\t// be transformed by.\n\t//\n\t// 6. We continue transforming \"current\" operation `a` until it is transformed by all `operationsB`. Then, go to 2.\n\t// unless the last operation `a` was transformed.\n\t//\n\t// The actual implementation of the above algorithm is slightly different, as only one loop (while) is used.\n\t// The difference is that we have \"current\" `a` operation to transform and we store the index of the next `b` operation\n\t// to transform by. Each loop operates on two indexes then: index pointing to currently processed `a` operation and\n\t// index pointing to next `b` operation. Each loop is just one `a * b` + `b * a` transformation. After each loop\n\t// operation `b` index is updated. If all `b` operations were visited for the current `a` operation, we change\n\t// current `a` operation index to the next one.\n\t//\n\n\t// For each operation `a`, keeps information what is the index in `operationsB` from which the transformation should start.\n\tconst nextTransformIndex = new WeakMap();\n\n\t// For all the original `operationsA`, set that they should be transformed starting from the first of `operationsB`.\n\tfor ( const op of operationsA ) {\n\t\tnextTransformIndex.set( op, 0 );\n\t}\n\n\t// Additional data that is used for some postprocessing after the main transformation process is done.\n\tconst data = {\n\t\tnextBaseVersionA: operationsA[ operationsA.length - 1 ].baseVersion + 1,\n\t\tnextBaseVersionB: operationsB[ operationsB.length - 1 ].baseVersion + 1,\n\t\toriginalOperationsACount: operationsA.length,\n\t\toriginalOperationsBCount: operationsB.length\n\t};\n\n\t// Index of currently transformed operation `a`.\n\tlet i = 0;\n\n\t// While not all `operationsA` are transformed...\n\twhile ( i < operationsA.length ) {\n\t\t// Get \"current\" operation `a`.\n\t\tconst opA = operationsA[ i ];\n\n\t\t// For the \"current\" operation `a`, get the index of the next operation `b` to transform by.\n\t\tconst indexB = nextTransformIndex.get( opA );\n\n\t\t// If operation `a` was already transformed by every operation `b`, change \"current\" operation `a` to the next one.\n\t\tif ( indexB == operationsB.length ) {\n\t\t\ti++;\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst opB = operationsB[ indexB ];\n\n\t\t// Transform `a` by `b` and `b` by `a`.\n\t\tconst newOpsA = transform( opA, opB, contextFactory.getContext( opA, opB, true ) );\n\t\tconst newOpsB = transform( opB, opA, contextFactory.getContext( opB, opA, false ) );\n\t\t// As a result we get one or more `newOpsA` and one or more `newOpsB` operations.\n\n\t\t// Update contextual information about operations.\n\t\tcontextFactory.updateRelation( opA, opB );\n\n\t\tcontextFactory.setOriginalOperations( newOpsA, opA );\n\t\tcontextFactory.setOriginalOperations( newOpsB, opB );\n\n\t\t// For new `a` operations, update their index of the next operation `b` to transform them by.\n\t\t//\n\t\t// This is needed even if there was only one result (`a` was not broken) because that information is used\n\t\t// at the beginning of this loop every time.\n\t\tfor ( const newOpA of newOpsA ) {\n\t\t\t// Acknowledge, that operation `b` also might be broken into multiple operations.\n\t\t\t//\n\t\t\t// This is why we raise `indexB` not just by 1. If `newOpsB` are multiple operations, they will be\n\t\t\t// spliced in the place of `opB`. So we need to change `transformBy` accordingly, so that an operation won't\n\t\t\t// be transformed by the same operation (part of it) again.\n\t\t\tnextTransformIndex.set( newOpA, indexB + newOpsB.length );\n\t\t}\n\n\t\t// Update `operationsA` and `operationsB` with the transformed versions.\n\t\toperationsA.splice( i, 1, ...newOpsA );\n\t\toperationsB.splice( indexB, 1, ...newOpsB );\n\t}\n\n\tif ( options.padWithNoOps ) {\n\t\t// If no-operations padding is enabled, count how many extra `a` and `b` operations were generated.\n\t\tconst brokenOperationsACount = operationsA.length - data.originalOperationsACount;\n\t\tconst brokenOperationsBCount = operationsB.length - data.originalOperationsBCount;\n\n\t\t// Then, if that number is not the same, pad `operationsA` or `operationsB` with correct number of no-ops so\n\t\t// that the base versions are equalled.\n\t\t//\n\t\t// Note that only one array will be updated, as only one of those subtractions can be greater than zero.\n\t\tpadWithNoOps( operationsA, brokenOperationsBCount - brokenOperationsACount );\n\t\tpadWithNoOps( operationsB, brokenOperationsACount - brokenOperationsBCount );\n\t}\n\n\t// Finally, update base versions of transformed operations.\n\tupdateBaseVersions( operationsA, data.nextBaseVersionB );\n\tupdateBaseVersions( operationsB, data.nextBaseVersionA );\n\n\treturn { operationsA, operationsB, originalOperations };\n}\n\n// Gathers additional data about operations processed during transformation. Can be used to obtain contextual information\n// about two operations that are about to be transformed. This contextual information can be used for better conflict resolution.\nclass ContextFactory {\n\t// Creates `ContextFactory` instance.\n\t//\n\t// @param {module:engine/model/document~Document} document Document which the operations change.\n\t// @param {Boolean} useRelations Whether during transformation relations should be used (used during undo for\n\t// better conflict resolution).\n\t// @param {Boolean} [forceWeakRemove=false] If set to `false`, remove operation will be always stronger than move operation,\n\t// so the removed nodes won't end up back in the document root. When set to `true`, context data will be used.\n\tconstructor( document, useRelations, forceWeakRemove = false ) {\n\t\t// For each operation that is created during transformation process, we keep a reference to the original operation\n\t\t// which it comes from. The original operation works as a kind of \"identifier\". Every contextual information\n\t\t// gathered during transformation that we want to save for given operation, is actually saved for the original operation.\n\t\t// This way no matter if operation `a` is cloned, then transformed, even breaks, we still have access to the previously\n\t\t// gathered data through original operation reference.\n\t\tthis.originalOperations = new Map();\n\n\t\t// `model.History` instance which information about undone operations will be taken from.\n\t\tthis._history = document.history;\n\n\t\t// Whether additional context should be used.\n\t\tthis._useRelations = useRelations;\n\n\t\tthis._forceWeakRemove = !!forceWeakRemove;\n\n\t\t// Relations is a double-map structure (maps in map) where for two operations we store how those operations were related\n\t\t// to each other. Those relations are evaluated during transformation process. For every transformated pair of operations\n\t\t// we keep relations between them.\n\t\tthis._relations = new Map();\n\t}\n\n\t// Sets \"original operation\" for given operations.\n\t//\n\t// During transformation process, operations are cloned, then changed, then processed again, sometimes broken into two\n\t// or multiple operations. When gathering additional data it is important that all operations can be somehow linked\n\t// so a cloned and transformed \"version\" still kept track of the data assigned earlier to it.\n\t//\n\t// The original operation object will be used as such an universal linking id. Throughout the transformation process\n\t// all cloned operations will refer to \"the original operation\" when storing and reading additional data.\n\t//\n\t// If `takeFrom` is not set, each operation from `operations` array will be assigned itself as \"the original operation\".\n\t// This should be used as an initialization step.\n\t//\n\t// If `takeFrom` is set, each operation from `operations` will be assigned the same original operation as assigned\n\t// for `takeFrom` operation. This should be used to update original operations. It should be used in a way that\n\t// `operations` are the result of `takeFrom` transformation to ensure proper \"original operation propagation\".\n\t//\n\t// @param {Array.<module:engine/model/operation/operation~Operation>} operations\n\t// @param {module:engine/model/operation/operation~Operation|null} [takeFrom=null]\n\tsetOriginalOperations( operations, takeFrom = null ) {\n\t\tconst originalOperation = takeFrom ? this.originalOperations.get( takeFrom ) : null;\n\n\t\tfor ( const operation of operations ) {\n\t\t\tthis.originalOperations.set( operation, originalOperation || operation );\n\t\t}\n\t}\n\n\t// Saves a relation between operations `opA` and `opB`.\n\t//\n\t// Relations are then later used to help solve conflicts when operations are transformed.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\tupdateRelation( opA, opB ) {\n\t\t// The use of relations is described in a bigger detail in transformation functions.\n\t\t//\n\t\t// In brief, this function, for specified pairs of operation types, checks how positions defined in those operations relate.\n\t\t// Then those relations are saved. For example, for two move operations, it is saved if one of those operations target\n\t\t// position is before the other operation source position. This kind of information gives contextual information when\n\t\t// transformation is used during undo. Similar checks are done for other pairs of operations.\n\t\t//\n\t\tswitch ( opA.constructor ) {\n\t\t\tcase MoveOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( opA.targetPosition.isEqual( opB.sourcePosition ) || opB.movedRange.containsPosition( opA.targetPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertAtSource' );\n\t\t\t\t\t\t} else if ( opA.targetPosition.isEqual( opB.deletionPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertBetween' );\n\t\t\t\t\t\t} else if ( opA.targetPosition.isAfter( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'moveTargetAfter' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tif ( opA.targetPosition.isEqual( opB.sourcePosition ) || opA.targetPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertBefore' );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'insertAfter' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase SplitOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( opA.splitPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitBefore' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tif ( opA.splitPosition.isEqual( opB.sourcePosition ) || opA.splitPosition.isBefore( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitBefore' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase MergeOperation: {\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tif ( !opA.targetPosition.isEqual( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeTargetNotMoved' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.targetPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeSourceNotMoved' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.sourcePosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'mergeSameElement' );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase SplitOperation: {\n\t\t\t\t\t\tif ( opA.sourcePosition.isEqual( opB.splitPosition ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, 'splitAtSource' );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\tcase MarkerOperation: {\n\t\t\t\tconst markerRange = opA.newRange;\n\n\t\t\t\tif ( !markerRange ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tswitch ( opB.constructor ) {\n\t\t\t\t\tcase MoveOperation: {\n\t\t\t\t\t\tconst movedRange = Range._createFromPositionAndShift( opB.sourcePosition, opB.howMany );\n\n\t\t\t\t\t\tconst affectedLeft = movedRange.containsPosition( markerRange.start ) ||\n\t\t\t\t\t\t\tmovedRange.start.isEqual( markerRange.start );\n\n\t\t\t\t\t\tconst affectedRight = movedRange.containsPosition( markerRange.end ) ||\n\t\t\t\t\t\t\tmovedRange.end.isEqual( markerRange.end );\n\n\t\t\t\t\t\tif ( ( affectedLeft || affectedRight ) && !movedRange.containsRange( markerRange ) ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, {\n\t\t\t\t\t\t\t\tside: affectedLeft ? 'left' : 'right',\n\t\t\t\t\t\t\t\tpath: affectedLeft ? markerRange.start.path.slice() : markerRange.end.path.slice()\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\n\t\t\t\t\tcase MergeOperation: {\n\t\t\t\t\t\tconst wasInLeftElement = markerRange.start.isEqual( opB.targetPosition );\n\t\t\t\t\t\tconst wasStartBeforeMergedElement = markerRange.start.isEqual( opB.deletionPosition );\n\t\t\t\t\t\tconst wasEndBeforeMergedElement = markerRange.end.isEqual( opB.deletionPosition );\n\t\t\t\t\t\tconst wasInRightElement = markerRange.end.isEqual( opB.sourcePosition );\n\n\t\t\t\t\t\tif ( wasInLeftElement || wasStartBeforeMergedElement || wasEndBeforeMergedElement || wasInRightElement ) {\n\t\t\t\t\t\t\tthis._setRelation( opA, opB, {\n\t\t\t\t\t\t\t\twasInLeftElement,\n\t\t\t\t\t\t\t\twasStartBeforeMergedElement,\n\t\t\t\t\t\t\t\twasEndBeforeMergedElement,\n\t\t\t\t\t\t\t\twasInRightElement\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Evaluates and returns contextual information about two given operations `opA` and `opB` which are about to be transformed.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @returns {module:engine/model/operation/transform~TransformationContext}\n\tgetContext( opA, opB, aIsStrong ) {\n\t\treturn {\n\t\t\taIsStrong,\n\t\t\taWasUndone: this._wasUndone( opA ),\n\t\t\tbWasUndone: this._wasUndone( opB ),\n\t\t\tabRelation: this._useRelations ? this._getRelation( opA, opB ) : null,\n\t\t\tbaRelation: this._useRelations ? this._getRelation( opB, opA ) : null,\n\t\t\tforceWeakRemove: this._forceWeakRemove\n\t\t};\n\t}\n\n\t// Returns whether given operation `op` has already been undone.\n\t//\n\t// Information whether an operation was undone gives more context when making a decision when two operations are in conflict.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} op\n\t// @returns {Boolean}\n\t_wasUndone( op ) {\n\t\t// For `op`, get its original operation. After all, if `op` is a clone (or even transformed clone) of another\n\t\t// operation, literally `op` couldn't be undone. It was just generated. If anything, it was the operation it origins\n\t\t// from which was undone. So get that original operation.\n\t\tconst originalOp = this.originalOperations.get( op );\n\n\t\t// And check with the document if the original operation was undone.\n\t\treturn originalOp.wasUndone || this._history.isUndoneOperation( originalOp );\n\t}\n\n\t// Returns a relation between `opA` and an operation which is undone by `opB`. This can be `String` value if a relation\n\t// was set earlier or `null` if there was no relation between those operations.\n\t//\n\t// This is a little tricky to understand, so let's compare it to `ContextFactory#_wasUndone`.\n\t//\n\t// When `wasUndone( opB )` is used, we check if the `opB` has already been undone. It is obvious, that the\n\t// undoing operation must happen after the undone operation. So, essentially, we have `opB`, we take document history,\n\t// we look forward in the future and ask if in that future `opB` was undone.\n\t//\n\t// Relations is a backward process to `wasUndone()`.\n\t//\n\t// Long story short - using relations is asking what happened in the past. Looking back. This time we have an undoing\n\t// operation `opB` which has undone some other operation. When there is a transformation `opA` x `opB` and there is\n\t// a conflict to solve and `opB` is an undoing operation, we can look back in the history and see what was a relation\n\t// between `opA` and the operation which `opB` undone. Basing on that relation from the past, we can now make\n\t// a better decision when resolving a conflict between two operations, because we know more about the context of\n\t// those two operations.\n\t//\n\t// This is why this function does not return a relation directly between `opA` and `opB` because we need to look\n\t// back to search for a meaningful contextual information.\n\t//\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @returns {String|null}\n\t_getRelation( opA, opB ) {\n\t\t// Get the original operation. Similarly as in `wasUndone()` it is used as an universal identifier for stored data.\n\t\tconst origB = this.originalOperations.get( opB );\n\t\tconst undoneB = this._history.getUndoneOperation( origB );\n\n\t\t// If `opB` is not undoing any operation, there is no relation.\n\t\tif ( !undoneB ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst origA = this.originalOperations.get( opA );\n\t\tconst relationsA = this._relations.get( origA );\n\n\t\t// Get all relations for `opA`, and check if there is a relation with `opB`-undone-counterpart. If so, return it.\n\t\tif ( relationsA ) {\n\t\t\treturn relationsA.get( undoneB ) || null;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t// Helper function for `ContextFactory#updateRelations`.\n\t//\n\t// @private\n\t// @param {module:engine/model/operation/operation~Operation} opA\n\t// @param {module:engine/model/operation/operation~Operation} opB\n\t// @param {String} relation\n\t_setRelation( opA, opB, relation ) {\n\t\t// As always, setting is for original operations, not the clones/transformed operations.\n\t\tconst origA = this.originalOperations.get( opA );\n\t\tconst origB = this.originalOperations.get( opB );\n\n\t\tlet relationsA = this._relations.get( origA );\n\n\t\tif ( !relationsA ) {\n\t\t\trelationsA = new Map();\n\t\t\tthis._relations.set( origA, relationsA );\n\t\t}\n\n\t\trelationsA.set( origB, relation );\n\t}\n}\n\n/**\n * Holds additional contextual information about a transformed pair of operations (`a` and `b`). Those information\n * can be used for better conflict resolving.\n *\n * @typedef {Object} module:engine/model/operation/transform~TransformationContext\n *\n * @property {Boolean} aIsStrong Whether `a` is strong operation in this transformation, or weak.\n * @property {Boolean} aWasUndone Whether `a` operation was undone.\n * @property {Boolean} bWasUndone Whether `b` operation was undone.\n * @property {String|null} abRelation The relation between `a` operation and an operation undone by `b` operation.\n * @property {String|null} baRelation The relation between `b` operation and an operation undone by `a` operation.\n */\n\n/**\n * An utility function that updates {@link module:engine/model/operation/operation~Operation#baseVersion base versions}\n * of passed operations.\n *\n * The function simply sets `baseVersion` as a base version of the first passed operation and then increments it for\n * each following operation in `operations`.\n *\n * @private\n * @param {Array.<module:engine/model/operation/operation~Operation>} operations Operations to update.\n * @param {Number} baseVersion Base version to set for the first operation in `operations`.\n */\nfunction updateBaseVersions( operations, baseVersion ) {\n\tfor ( const operation of operations ) {\n\t\toperation.baseVersion = baseVersion++;\n\t}\n}\n\n/**\n * Adds `howMany` instances of {@link module:engine/model/operation/nooperation~NoOperation} to `operations` set.\n *\n * @private\n * @param {Array.<module:engine/model/operation/operation~Operation>} operations\n * @param {Number} howMany\n */\nfunction padWithNoOps( operations, howMany ) {\n\tfor ( let i = 0; i < howMany; i++ ) {\n\t\toperations.push( new NoOperation( 0 ) );\n\t}\n}\n\n// -----------------------\n\nsetTransformation( AttributeOperation, AttributeOperation, ( a, b, context ) => {\n\tif ( a.key === b.key ) {\n\t\t// If operations attributes are in conflict, check if their ranges intersect and manage them properly.\n\n\t\t// First, we want to apply change to the part of a range that has not been changed by the other operation.\n\t\tconst operations = a.range.getDifference( b.range ).map( range => {\n\t\t\treturn new AttributeOperation( range, a.key, a.oldValue, a.newValue, 0 );\n\t\t} );\n\n\t\t// Then we take care of the common part of ranges.\n\t\tconst common = a.range.getIntersection( b.range );\n\n\t\tif ( common ) {\n\t\t\t// If this operation is more important, we also want to apply change to the part of the\n\t\t\t// original range that has already been changed by the other operation. Since that range\n\t\t\t// got changed we also have to update `oldValue`.\n\t\t\tif ( context.aIsStrong ) {\n\t\t\t\toperations.push( new AttributeOperation( common, b.key, b.newValue, a.newValue, 0 ) );\n\t\t\t}\n\t\t}\n\n\t\tif ( operations.length == 0 ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\treturn operations;\n\t} else {\n\t\t// If operations don't conflict, simply return an array containing just a clone of this operation.\n\t\treturn [ a ];\n\t}\n} );\n\nsetTransformation( AttributeOperation, InsertOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// The attribute operation range includes the position where nodes were inserted.\n\t// There are two possible scenarios: the inserted nodes were text and they should receive attributes or\n\t// the inserted nodes were elements and they should not receive attributes.\n\t//\n\tif ( a.range.start.hasSameParentAs( b.position ) && a.range.containsPosition( b.position ) ) {\n\t\t// If new nodes should not receive attributes, two separated ranges will be returned.\n\t\t// Otherwise, one expanded range will be returned.\n\t\tconst range = a.range._getTransformedByInsertion( b.position, b.howMany, !b.shouldReceiveAttributes );\n\t\tconst result = range.map( r => {\n\t\t\treturn new AttributeOperation( r, a.key, a.oldValue, a.newValue, a.baseVersion );\n\t\t} );\n\n\t\tif ( b.shouldReceiveAttributes ) {\n\t\t\t// `AttributeOperation#range` includes some newly inserted text.\n\t\t\t// The operation should also change the attribute of that text. An example:\n\t\t\t//\n\t\t\t// Bold should be applied on the following range:\n\t\t\t// <p>Fo[zb]ar</p>\n\t\t\t//\n\t\t\t// In meantime, new text is typed:\n\t\t\t// <p>Fozxxbar</p>\n\t\t\t//\n\t\t\t// Bold should be applied also on the new text:\n\t\t\t// <p>Fo[zxxb]ar</p>\n\t\t\t// <p>Fo<$text bold=\"true\">zxxb</$text>ar</p>\n\t\t\t//\n\t\t\t// There is a special case to consider here to consider.\n\t\t\t//\n\t\t\t// Consider setting an attribute with multiple possible values, for example `highlight`. The inserted text might\n\t\t\t// have already an attribute value applied and the `oldValue` property of the attribute operation might be wrong:\n\t\t\t//\n\t\t\t// Attribute `highlight=\"yellow\"` should be applied on the following range:\n\t\t\t// <p>Fo[zb]ar<p>\n\t\t\t//\n\t\t\t// In meantime, character `x` with `highlight=\"red\"` is typed:\n\t\t\t// <p>Fo[z<$text highlight=\"red\">x</$text>b]ar</p>\n\t\t\t//\n\t\t\t// In this case we cannot simply apply operation changing the attribute value from `null` to `\"yellow\"` for the whole range\n\t\t\t// because that would lead to an exception (`oldValue` is incorrect for `x`).\n\t\t\t//\n\t\t\t// We also cannot break the original range as this would mess up a scenario when there are multiple following\n\t\t\t// insert operations, because then only the first inserted character is included in those ranges:\n\t\t\t// <p>Fo[z][x][b]ar</p> --> <p>Fo[z][x]x[b]ar</p> --> <p>Fo[z][x]xx[b]ar</p>\n\t\t\t//\n\t\t\t// So, the attribute range needs be expanded, no matter what attributes are set on the inserted nodes:\n\t\t\t//\n\t\t\t// <p>Fo[z<$text highlight=\"red\">x</$text>b]ar</p> <--- Change from `null` to `yellow`, throwing an exception.\n\t\t\t//\n\t\t\t// But before that operation would be applied, we will add an additional attribute operation that will change\n\t\t\t// attributes on the inserted nodes in a way which would make the original operation correct:\n\t\t\t//\n\t\t\t// <p>Fo[z{<$text highlight=\"red\">}x</$text>b]ar</p> <--- Change range `{}` from `red` to `null`.\n\t\t\t// <p>Fo[zxb]ar</p> <--- Now change from `null` to `yellow` is completely fine.\n\t\t\t//\n\n\t\t\t// Generate complementary attribute operation. Be sure to add it before the original operation.\n\t\t\tconst op = _getComplementaryAttributeOperations( b, a.key, a.oldValue );\n\n\t\t\tif ( op ) {\n\t\t\t\tresult.unshift( op );\n\t\t\t}\n\t\t}\n\n\t\t// If nodes should not receive new attribute, we are done here.\n\t\treturn result;\n\t}\n\n\t// If insert operation is not expanding the attribute operation range, simply transform the range.\n\ta.range = a.range._getTransformedByInsertion( b.position, b.howMany, false )[ 0 ];\n\n\treturn [ a ];\n} );\n\n/**\n * Helper function for `AttributeOperation` x `InsertOperation` (and reverse) transformation.\n *\n * For given `insertOperation` it checks the inserted node if it has an attribute `key` set to a value different\n * than `newValue`. If so, it generates an `AttributeOperation` which changes the value of `key` attribute to `newValue`.\n *\n * @private\n * @param {module:engine/model/operation/insertoperation~InsertOperation} insertOperation\n * @param {String} key\n * @param {*} newValue\n * @returns {module:engine/model/operation/attributeoperation~AttributeOperation|null}\n */\nfunction _getComplementaryAttributeOperations( insertOperation, key, newValue ) {\n\tconst nodes = insertOperation.nodes;\n\n\t// At the beginning we store the attribute value from the first node.\n\tconst insertValue = nodes.getNode( 0 ).getAttribute( key );\n\n\tif ( insertValue == newValue ) {\n\t\treturn null;\n\t}\n\n\tconst range = new Range( insertOperation.position, insertOperation.position.getShiftedBy( insertOperation.howMany ) );\n\n\treturn new AttributeOperation( range, key, insertValue, newValue, 0 );\n}\n\nsetTransformation( AttributeOperation, MergeOperation, ( a, b ) => {\n\tconst ranges = [];\n\n\t// Case 1:\n\t//\n\t// Attribute change on the merged element. In this case, the merged element was moved to the graveyard.\n\t// An additional attribute operation that will change the (re)moved element needs to be generated.\n\t//\n\tif ( a.range.start.hasSameParentAs( b.deletionPosition ) ) {\n\t\tif ( a.range.containsPosition( b.deletionPosition ) || a.range.start.isEqual( b.deletionPosition ) ) {\n\t\t\tranges.push( Range._createFromPositionAndShift( b.graveyardPosition, 1 ) );\n\t\t}\n\t}\n\n\tconst range = a.range._getTransformedByMergeOperation( b );\n\n\t// Do not add empty (collapsed) ranges to the result. `range` may be collapsed if it contained only the merged element.\n\tif ( !range.isCollapsed ) {\n\t\tranges.push( range );\n\t}\n\n\t// Create `AttributeOperation`s out of the ranges.\n\treturn ranges.map( range => {\n\t\treturn new AttributeOperation( range, a.key, a.oldValue, a.newValue, a.baseVersion );\n\t} );\n} );\n\nsetTransformation( AttributeOperation, MoveOperation, ( a, b ) => {\n\tconst ranges = _breakRangeByMoveOperation( a.range, b );\n\n\t// Create `AttributeOperation`s out of the ranges.\n\treturn ranges.map( range => new AttributeOperation( range, a.key, a.oldValue, a.newValue, a.baseVersion ) );\n} );\n\n// Helper function for `AttributeOperation` x `MoveOperation` transformation.\n//\n// Takes the passed `range` and transforms it by move operation `moveOp` in a specific way. Only top-level nodes of `range`\n// are considered to be in the range. If move operation moves nodes deep from inside of the range, those nodes won't\n// be included in the result. In other words, top-level nodes of the ranges from the result are exactly the same as\n// top-level nodes of the original `range`.\n//\n// This is important for `AttributeOperation` because, for its range, it changes only the top-level nodes. So we need to\n// track only how those nodes have been affected by `MoveOperation`.\n//\n// @private\n// @param {module:engine/model/range~Range} range\n// @param {module:engine/model/operation/moveoperation~MoveOperation} moveOp\n// @returns {Array.<module:engine/model/range~Range>}\nfunction _breakRangeByMoveOperation( range, moveOp ) {\n\tconst moveRange = Range._createFromPositionAndShift( moveOp.sourcePosition, moveOp.howMany );\n\n\t// We are transforming `range` (original range) by `moveRange` (range moved by move operation). As usual when it comes to\n\t// transforming a ranges, we may have a common part of the ranges and we may have a difference part (zero to two ranges).\n\tlet common = null;\n\tlet difference = [];\n\n\t// Let's compare the ranges.\n\tif ( moveRange.containsRange( range, true ) ) {\n\t\t// If the whole original range is moved, treat it whole as a common part. There's also no difference part.\n\t\tcommon = range;\n\t} else if ( range.start.hasSameParentAs( moveRange.start ) ) {\n\t\t// If the ranges are \"on the same level\" (in the same parent) then move operation may move exactly those nodes\n\t\t// that are changed by the attribute operation. In this case we get common part and difference part in the usual way.\n\t\tdifference = range.getDifference( moveRange );\n\t\tcommon = range.getIntersection( moveRange );\n\t} else {\n\t\t// In any other situation we assume that original range is different than move range, that is that move operation\n\t\t// moves other nodes that attribute operation change. Even if the moved range is deep inside in the original range.\n\t\t//\n\t\t// Note that this is different than in `.getIntersection` (we would get a common part in that case) and different\n\t\t// than `.getDifference` (we would get two ranges).\n\t\tdifference = [ range ];\n\t}\n\n\tconst result = [];\n\n\t// The default behaviour of `_getTransformedByMove` might get wrong results for difference part, though, so\n\t// we do it by hand.\n\tfor ( let diff of difference ) {\n\t\t// First, transform the range by removing moved nodes. Since this is a difference, this is safe, `null` won't be returned\n\t\t// as the range is different than the moved range.\n\t\tdiff = diff._getTransformedByDeletion( moveOp.sourcePosition, moveOp.howMany );\n\n\t\t// Transform also `targetPosition`.\n\t\tconst targetPosition = moveOp.getMovedRangeStart();\n\n\t\t// Spread the range only if moved nodes are inserted only between the top-level nodes of the `diff` range.\n\t\tconst spread = diff.start.hasSameParentAs( targetPosition );\n\n\t\t// Transform by insertion of moved nodes.\n\t\tdiff = diff._getTransformedByInsertion( targetPosition, moveOp.howMany, spread );\n\n\t\tresult.push( ...diff );\n\t}\n\n\t// Common part can be simply transformed by the move operation. This is because move operation will not target to\n\t// that common part (the operation would have to target inside its own moved range).\n\tif ( common ) {\n\t\tresult.push(\n\t\t\tcommon._getTransformedByMove( moveOp.sourcePosition, moveOp.targetPosition, moveOp.howMany, false )[ 0 ]\n\t\t);\n\t}\n\n\treturn result;\n}\n\nsetTransformation( AttributeOperation, SplitOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// Split node is the last node in `AttributeOperation#range`.\n\t// `AttributeOperation#range` needs to be expanded to include the new (split) node.\n\t//\n\t// Attribute `type` to be changed to `numbered` but the `listItem` is split.\n\t// <listItem type=\"bulleted\">foobar</listItem>\n\t//\n\t// After split:\n\t// <listItem type=\"bulleted\">foo</listItem><listItem type=\"bulleted\">bar</listItem>\n\t//\n\t// After attribute change:\n\t// <listItem type=\"numbered\">foo</listItem><listItem type=\"numbered\">foo</listItem>\n\t//\n\tif ( a.range.end.isEqual( b.insertionPosition ) ) {\n\t\tif ( !b.graveyardPosition ) {\n\t\t\ta.range.end.offset++;\n\t\t}\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 2:\n\t//\n\t// Split position is inside `AttributeOperation#range`, at the same level, so the nodes to change are\n\t// not going to make a flat range.\n\t//\n\t// Content with range-to-change and split position:\n\t// <p>Fo[zb^a]r</p>\n\t//\n\t// After split:\n\t// <p>Fozb</p><p>ar</p>\n\t//\n\t// Make two separate ranges containing all nodes to change:\n\t// <p>Fo[zb]</p><p>[a]r</p>\n\t//\n\tif ( a.range.start.hasSameParentAs( b.splitPosition ) && a.range.containsPosition( b.splitPosition ) ) {\n\t\tconst secondPart = a.clone();\n\n\t\tsecondPart.range = new Range(\n\t\t\tb.moveTargetPosition.clone(),\n\t\t\ta.range.end._getCombined( b.splitPosition, b.moveTargetPosition )\n\t\t);\n\n\t\ta.range.end = b.splitPosition.clone();\n\t\ta.range.end.stickiness = 'toPrevious';\n\n\t\treturn [ a, secondPart ];\n\t}\n\n\t// The default case.\n\t//\n\ta.range = a.range._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, AttributeOperation, ( a, b ) => {\n\tconst result = [ a ];\n\n\t// Case 1:\n\t//\n\t// The attribute operation range includes the position where nodes were inserted.\n\t// There are two possible scenarios: the inserted nodes were text and they should receive attributes or\n\t// the inserted nodes were elements and they should not receive attributes.\n\t//\n\t// This is a mirror scenario to the one described in `AttributeOperation` x `InsertOperation` transformation,\n\t// although this case is a little less complicated. In this case we simply need to change attributes of the\n\t// inserted nodes and that's it.\n\t//\n\tif ( a.shouldReceiveAttributes && a.position.hasSameParentAs( b.range.start ) && b.range.containsPosition( a.position ) ) {\n\t\tconst op = _getComplementaryAttributeOperations( a, b.key, b.newValue );\n\n\t\tif ( op ) {\n\t\t\tresult.push( op );\n\t\t}\n\t}\n\n\t// The default case is: do nothing.\n\t// `AttributeOperation` does not change the model tree structure so `InsertOperation` does not need to be changed.\n\t//\n\treturn result;\n} );\n\nsetTransformation( InsertOperation, InsertOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Two insert operations insert nodes at the same position. Since they are the same, it needs to be decided\n\t// what will be the order of inserted nodes. However, there is no additional information to help in that\n\t// decision. Also, when `b` will be transformed by `a`, the same order must be maintained.\n\t//\n\t// To achieve that, we will check if the operation is strong.\n\t// If it is, it won't get transformed. If it is not, it will be moved.\n\t//\n\tif ( a.position.isEqual( b.position ) && context.aIsStrong ) {\n\t\treturn [ a ];\n\t}\n\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, MoveOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedByMoveOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, SplitOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( InsertOperation, MergeOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MarkerOperation, InsertOperation, ( a, b ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedByInsertOperation( b )[ 0 ];\n\t}\n\n\tif ( a.newRange ) {\n\t\ta.newRange = a.newRange._getTransformedByInsertOperation( b )[ 0 ];\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MarkerOperation, ( a, b, context ) => {\n\tif ( a.name == b.name ) {\n\t\tif ( context.aIsStrong ) {\n\t\t\ta.oldRange = b.newRange ? b.newRange.clone() : null;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MergeOperation, ( a, b ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedByMergeOperation( b );\n\t}\n\n\tif ( a.newRange ) {\n\t\ta.newRange = a.newRange._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, MoveOperation, ( a, b, context ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = Range._createFromRanges( a.oldRange._getTransformedByMoveOperation( b ) );\n\t}\n\n\tif ( a.newRange ) {\n\t\tif ( context.abRelation ) {\n\t\t\tconst aNewRange = Range._createFromRanges( a.newRange._getTransformedByMoveOperation( b ) );\n\n\t\t\tif ( context.abRelation.side == 'left' && b.targetPosition.isEqual( a.newRange.start ) ) {\n\t\t\t\ta.newRange.start.path = context.abRelation.path;\n\t\t\t\ta.newRange.end = aNewRange.end;\n\n\t\t\t\treturn [ a ];\n\t\t\t} else if ( context.abRelation.side == 'right' && b.targetPosition.isEqual( a.newRange.end ) ) {\n\t\t\t\ta.newRange.start = aNewRange.start;\n\t\t\t\ta.newRange.end.path = context.abRelation.path;\n\n\t\t\t\treturn [ a ];\n\t\t\t}\n\t\t}\n\n\t\ta.newRange = Range._createFromRanges( a.newRange._getTransformedByMoveOperation( b ) );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MarkerOperation, SplitOperation, ( a, b, context ) => {\n\tif ( a.oldRange ) {\n\t\ta.oldRange = a.oldRange._getTransformedBySplitOperation( b );\n\t}\n\n\tif ( a.newRange ) {\n\t\tif ( context.abRelation ) {\n\t\t\tconst aNewRange = a.newRange._getTransformedBySplitOperation( b );\n\n\t\t\tif ( a.newRange.start.isEqual( b.splitPosition ) && context.abRelation.wasStartBeforeMergedElement ) {\n\t\t\t\ta.newRange.start = Position._createAt( b.insertionPosition );\n\t\t\t} else if ( a.newRange.start.isEqual( b.splitPosition ) && !context.abRelation.wasInLeftElement ) {\n\t\t\t\ta.newRange.start = Position._createAt( b.moveTargetPosition );\n\t\t\t}\n\n\t\t\tif ( a.newRange.end.isEqual( b.splitPosition ) && context.abRelation.wasInRightElement ) {\n\t\t\t\ta.newRange.end = Position._createAt( b.moveTargetPosition );\n\t\t\t} else if ( a.newRange.end.isEqual( b.splitPosition ) && context.abRelation.wasEndBeforeMergedElement ) {\n\t\t\t\ta.newRange.end = Position._createAt( b.insertionPosition );\n\t\t\t} else {\n\t\t\t\ta.newRange.end = aNewRange.end;\n\t\t\t}\n\n\t\t\treturn [ a ];\n\t\t}\n\n\t\ta.newRange = a.newRange._getTransformedBySplitOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MergeOperation, InsertOperation, ( a, b ) => {\n\tif ( a.sourcePosition.hasSameParentAs( b.position ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByInsertOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, MergeOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Same merge operations.\n\t//\n\t// Both operations have same source and target positions. So the element already got merged and there is\n\t// theoretically nothing to do.\n\t//\n\tif ( a.sourcePosition.isEqual( b.sourcePosition ) && a.targetPosition.isEqual( b.targetPosition ) ) {\n\t\t// There are two ways that we can provide a do-nothing operation.\n\t\t//\n\t\t// First is simply a NoOperation instance. We will use it if `b` operation was not undone.\n\t\t//\n\t\t// Second is a merge operation that has the source operation in the merged element - in the graveyard -\n\t\t// same target position and `howMany` equal to `0`. So it is basically merging an empty element from graveyard\n\t\t// which is almost the same as NoOperation.\n\t\t//\n\t\t// This way the merge operation can be later transformed by split operation\n\t\t// to provide correct undo. This will be used if `b` operation was undone (only then it is correct).\n\t\t//\n\t\tif ( !context.bWasUndone ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t} else {\n\t\t\tconst path = b.graveyardPosition.path.slice();\n\t\t\tpath.push( 0 );\n\n\t\t\ta.sourcePosition = new Position( b.graveyardPosition.root, path );\n\t\t\ta.howMany = 0;\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Same merge source position but different target position.\n\t//\n\t// This can happen during collaboration. For example, if one client merged a paragraph to the previous paragraph\n\t// and the other person removed that paragraph and merged the same paragraph to something before:\n\t//\n\t// Client A:\n\t// <p>Foo</p><p>Bar</p><p>[]Xyz</p>\n\t// <p>Foo</p><p>BarXyz</p>\n\t//\n\t// Client B:\n\t// <p>Foo</p>[<p>Bar</p>]<p>Xyz</p>\n\t// <p>Foo</p><p>[]Xyz</p>\n\t// <p>FooXyz</p>\n\t//\n\t// In this case we need to decide where finally \"Xyz\" will land:\n\t//\n\t// <p>FooXyz</p> graveyard: <p>Bar</p>\n\t// <p>Foo</p> graveyard: <p>BarXyz</p>\n\t//\n\t// Let's move it in a way so that a merge operation that does not target to graveyard is more important so that\n\t// nodes does not end up in the graveyard. It makes sense. Both for Client A and for Client B \"Xyz\" finally did not\n\t// end up in the graveyard (see above).\n\t//\n\t// If neither or both operations point to graveyard, then let `aIsStrong` decide.\n\t//\n\tif (\n\t\ta.sourcePosition.isEqual( b.sourcePosition ) && !a.targetPosition.isEqual( b.targetPosition ) &&\n\t\t!context.bWasUndone && context.abRelation != 'splitAtSource'\n\t) {\n\t\tconst aToGraveyard = a.targetPosition.root.rootName == '$graveyard';\n\t\tconst bToGraveyard = b.targetPosition.root.rootName == '$graveyard';\n\n\t\t// If `aIsWeak` it means that `a` points to graveyard while `b` doesn't. Don't move nodes then.\n\t\tconst aIsWeak = aToGraveyard && !bToGraveyard;\n\n\t\t// If `bIsWeak` it means that `b` points to graveyard while `a` doesn't. Force moving nodes then.\n\t\tconst bIsWeak = bToGraveyard && !aToGraveyard;\n\n\t\t// Force move if `b` is weak or neither operation is weak but `a` is stronger through `context.aIsStrong`.\n\t\tconst forceMove = bIsWeak || ( !aIsWeak && context.aIsStrong );\n\n\t\tif ( forceMove ) {\n\t\t\tconst sourcePosition = b.targetPosition._getTransformedByMergeOperation( b );\n\t\t\tconst targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\treturn [ new MoveOperation( sourcePosition, a.howMany, targetPosition, 0 ) ];\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByMergeOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t// Handle positions in graveyard.\n\t// If graveyard positions are same and `a` operation is strong - do not transform.\n\tif ( !a.graveyardPosition.isEqual( b.graveyardPosition ) || !context.aIsStrong ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, MoveOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// The element to merge got removed.\n\t//\n\t// Merge operation does support merging elements which are not siblings. So it would not be a problem\n\t// from technical point of view. However, if the element was removed, the intention of the user deleting it\n\t// was to have it all deleted, together with its children. From user experience point of view, moving back the\n\t// removed nodes might be unexpected. This means that in this scenario we will block the merging.\n\t//\n\t// The exception of this rule would be if the remove operation was later undone.\n\t//\n\tconst removedRange = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\tif ( b.type == 'remove' && !context.bWasUndone && !context.forceWeakRemove ) {\n\t\tif ( a.deletionPosition.hasSameParentAs( b.sourcePosition ) && removedRange.containsPosition( a.sourcePosition ) ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\tif ( a.sourcePosition.hasSameParentAs( b.sourcePosition ) ) {\n\t\ta.howMany -= b.howMany;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedByMoveOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedByMoveOperation( b );\n\n\t// `MergeOperation` graveyard position is like `MoveOperation` target position. It is a position where element(s) will\n\t// be moved. Like in other similar cases, we need to consider the scenario when those positions are same.\n\t// Here, we will treat `MergeOperation` like it is always strong (see `InsertOperation` x `InsertOperation` for comparison).\n\t// This means that we won't transform graveyard position if it is equal to move operation target position.\n\tif ( !a.graveyardPosition.isEqual( b.targetPosition ) ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MergeOperation, SplitOperation, ( a, b, context ) => {\n\tif ( b.graveyardPosition ) {\n\t\t// If `b` operation defines graveyard position, a node from graveyard will be moved. This means that we need to\n\t\t// transform `a.graveyardPosition` accordingly.\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByDeletion( b.graveyardPosition, 1 );\n\n\t\t// This is a scenario foreseen in `MergeOperation` x `MergeOperation`, with two identical merge operations.\n\t\t//\n\t\t// So, there was `MergeOperation` x `MergeOperation` transformation earlier. Now, `a` is a merge operation which\n\t\t// source position is in graveyard. Interestingly, split operation wants to use the node to be merged by `a`. This\n\t\t// means that `b` is undoing that merge operation from earlier, which caused `a` to be in graveyard.\n\t\t//\n\t\t// If that's the case, at this point, we will only \"fix\" `a.howMany`. It was earlier set to `0` in\n\t\t// `MergeOperation` x `MergeOperation` transformation. Later transformations in this function will change other\n\t\t// properties.\n\t\t//\n\t\tif ( a.deletionPosition.isEqual( b.graveyardPosition ) ) {\n\t\t\ta.howMany = b.howMany;\n\t\t}\n\t}\n\n\t// Case 1:\n\t//\n\t// Merge operation moves nodes to the place where split happens.\n\t// This is a classic situation when there are two paragraphs, and there is a split (enter) after the first\n\t// paragraph and there is a merge (delete) at the beginning of the second paragraph:\n\t//\n\t// <p>Foo{}</p><p>[]Bar</p>.\n\t//\n\t// Split is after `Foo`, while merge is from `Bar` to the end of `Foo`.\n\t//\n\t// State after split:\n\t// <p>Foo</p><p></p><p>Bar</p>\n\t//\n\t// Now, `Bar` should be merged to the new paragraph:\n\t// <p>Foo</p><p>Bar</p>\n\t//\n\t// Instead of merging it to the original paragraph:\n\t// <p>FooBar</p><p></p>\n\t//\n\t// This means that `targetPosition` needs to be transformed. This is the default case though.\n\t// For example, if the split would be after `F`, `targetPosition` should also be transformed.\n\t//\n\t// There are three exceptions, though, when we want to keep `targetPosition` as it was.\n\t//\n\t// First exception is when the merge target position is inside an element (not at the end, as usual). This\n\t// happens when the merge operation earlier was transformed by \"the same\" merge operation. If merge operation\n\t// targets inside the element we want to keep the original target position (and not transform it) because\n\t// we have additional context telling us that we want to merge to the original element. We can check if the\n\t// merge operation points inside element by checking what is `SplitOperation#howMany`. Since merge target position\n\t// is same as split position, if `howMany` is non-zero, it means that the merge target position is inside an element.\n\t//\n\t// Second exception is when the element to merge is in the graveyard and split operation uses it. In that case\n\t// if target position would be transformed, the merge operation would target at the source position:\n\t//\n\t// root: <p>Foo</p>\t\t\t\tgraveyard: <p></p>\n\t//\n\t// SplitOperation: root [ 0, 3 ] using graveyard [ 0 ] (howMany = 0)\n\t// MergeOperation: graveyard [ 0, 0 ] -> root [ 0, 3 ] (howMany = 0)\n\t//\n\t// Since split operation moves the graveyard node back to the root, the merge operation source position changes.\n\t// We would like to merge from the empty <p> to the \"Foo\" <p>:\n\t//\n\t// root: <p>Foo</p><p></p>\t\t\tgraveyard:\n\t//\n\t// MergeOperation#sourcePosition = root [ 1, 0 ]\n\t//\n\t// If `targetPosition` is transformed, it would become root [ 1, 0 ] as well. It has to be kept as it was.\n\t//\n\t// Third exception is connected with relations. If this happens during undo and we have explicit information\n\t// that target position has not been affected by the operation which is undone by this split then this split should\n\t// not move the target position either.\n\t//\n\tif ( a.targetPosition.isEqual( b.splitPosition ) ) {\n\t\tconst mergeInside = b.howMany != 0;\n\t\tconst mergeSplittingElement = b.graveyardPosition && a.deletionPosition.isEqual( b.graveyardPosition );\n\n\t\tif ( mergeInside || mergeSplittingElement || context.abRelation == 'mergeTargetNotMoved' ) {\n\t\t\ta.sourcePosition = a.sourcePosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Merge source is at the same position as split position. This sometimes happen, mostly during undo.\n\t// The decision here is mostly to choose whether merge source position should stay where it is (so it will be at the end of the\n\t// split element) or should be move to the beginning of the new element.\n\t//\n\tif ( a.sourcePosition.isEqual( b.splitPosition ) ) {\n\t\t// Use context to check if `SplitOperation` is not undoing a merge operation, that didn't change the `a` operation.\n\t\t// This scenario happens the undone merge operation moved nodes at the source position of `a` operation.\n\t\t// In that case `a` operation source position should stay where it is.\n\t\tif ( context.abRelation == 'mergeSourceNotMoved' ) {\n\t\t\ta.howMany = 0;\n\t\t\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\n\t\t// This merge operation might have been earlier transformed by a merge operation which both merged the same element.\n\t\t// See that case in `MergeOperation` x `MergeOperation` transformation. In that scenario, if the merge operation has been undone,\n\t\t// the special case is not applied.\n\t\t//\n\t\t// Now, the merge operation is transformed by the split which has undone that previous merge operation.\n\t\t// So now we are fixing situation which was skipped in `MergeOperation` x `MergeOperation` case.\n\t\t//\n\t\tif ( context.abRelation == 'mergeSameElement' || a.sourcePosition.offset > 0 ) {\n\t\t\ta.sourcePosition = b.moveTargetPosition.clone();\n\t\t\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.sourcePosition.hasSameParentAs( b.splitPosition ) ) {\n\t\ta.howMany = b.splitPosition.offset;\n\t}\n\n\ta.sourcePosition = a.sourcePosition._getTransformedBySplitOperation( b );\n\ta.targetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( MoveOperation, InsertOperation, ( a, b ) => {\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst transformed = moveRange._getTransformedByInsertOperation( b, false )[ 0 ];\n\n\ta.sourcePosition = transformed.start;\n\ta.howMany = transformed.end.offset - transformed.start.offset;\n\n\t// See `InsertOperation` x `MoveOperation` transformation for details on this case.\n\t//\n\t// In summary, both operations point to the same place, so the order of nodes needs to be decided.\n\t// `MoveOperation` is considered weaker, so it is always transformed, unless there was a certain relation\n\t// between operations.\n\t//\n\tif ( !a.targetPosition.isEqual( b.position ) ) {\n\t\ta.targetPosition = a.targetPosition._getTransformedByInsertOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( MoveOperation, MoveOperation, ( a, b, context ) => {\n\t//\n\t// Setting and evaluating some variables that will be used in special cases and default algorithm.\n\t//\n\t// Create ranges from `MoveOperations` properties.\n\tconst rangeA = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst rangeB = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\t// Assign `context.aIsStrong` to a different variable, because the value may change during execution of\n\t// this algorithm and we do not want to override original `context.aIsStrong` that will be used in later transformations.\n\tlet aIsStrong = context.aIsStrong;\n\n\t// This will be used to decide the order of nodes if both operations target at the same position.\n\t// By default, use strong/weak operation mechanism.\n\tlet insertBefore = !context.aIsStrong;\n\n\t// If the relation is set, then use it to decide nodes order.\n\tif ( context.abRelation == 'insertBefore' || context.baRelation == 'insertAfter' ) {\n\t\tinsertBefore = true;\n\t} else if ( context.abRelation == 'insertAfter' || context.baRelation == 'insertBefore' ) {\n\t\tinsertBefore = false;\n\t}\n\n\t// `a.targetPosition` could be affected by the `b` operation. We will transform it.\n\tlet newTargetPosition;\n\n\tif ( a.targetPosition.isEqual( b.targetPosition ) && insertBefore ) {\n\t\tnewTargetPosition = a.targetPosition._getTransformedByDeletion(\n\t\t\tb.sourcePosition,\n\t\t\tb.howMany\n\t\t);\n\t} else {\n\t\tnewTargetPosition = a.targetPosition._getTransformedByMove(\n\t\t\tb.sourcePosition,\n\t\t\tb.targetPosition,\n\t\t\tb.howMany\n\t\t);\n\t}\n\n\t//\n\t// Special case #1 + mirror.\n\t//\n\t// Special case when both move operations' target positions are inside nodes that are\n\t// being moved by the other move operation. So in other words, we move ranges into inside of each other.\n\t// This case can't be solved reasonably (on the other hand, it should not happen often).\n\tif ( _moveTargetIntoMovedRange( a, b ) && _moveTargetIntoMovedRange( b, a ) ) {\n\t\t// Instead of transforming operation, we return a reverse of the operation that we transform by.\n\t\t// So when the results of this \"transformation\" will be applied, `b` MoveOperation will get reversed.\n\t\treturn [ b.getReversed() ];\n\t}\n\t//\n\t// End of special case #1.\n\t//\n\n\t//\n\t// Special case #2.\n\t//\n\t// Check if `b` operation targets inside `rangeA`.\n\tconst bTargetsToA = rangeA.containsPosition( b.targetPosition );\n\n\t// If `b` targets to `rangeA` and `rangeA` contains `rangeB`, `b` operation has no influence on `a` operation.\n\t// You might say that operation `b` is captured inside operation `a`.\n\tif ( bTargetsToA && rangeA.containsRange( rangeB, true ) ) {\n\t\t// There is a mini-special case here, where `rangeB` is on other level than `rangeA`. That's why\n\t\t// we need to transform `a` operation anyway.\n\t\trangeA.start = rangeA.start._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\t\trangeA.end = rangeA.end._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\n\t//\n\t// Special case #2 mirror.\n\t//\n\tconst aTargetsToB = rangeB.containsPosition( a.targetPosition );\n\n\tif ( aTargetsToB && rangeB.containsRange( rangeA, true ) ) {\n\t\t// `a` operation is \"moved together\" with `b` operation.\n\t\t// Here, just move `rangeA` \"inside\" `rangeB`.\n\t\trangeA.start = rangeA.start._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\t\trangeA.end = rangeA.end._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\t//\n\t// End of special case #2.\n\t//\n\n\t//\n\t// Special case #3 + mirror.\n\t//\n\t// `rangeA` has a node which is an ancestor of `rangeB`. In other words, `rangeB` is inside `rangeA`\n\t// but not on the same tree level. In such case ranges have common part but we have to treat it\n\t// differently, because in such case those ranges are not really conflicting and should be treated like\n\t// two separate ranges. Also we have to discard two difference parts.\n\tconst aCompB = compareArrays( a.sourcePosition.getParentPath(), b.sourcePosition.getParentPath() );\n\n\tif ( aCompB == 'prefix' || aCompB == 'extension' ) {\n\t\t// Transform `rangeA` by `b` operation and make operation out of it, and that's all.\n\t\t// Note that this is a simplified version of default case, but here we treat the common part (whole `rangeA`)\n\t\t// like a one difference part.\n\t\trangeA.start = rangeA.start._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\t\trangeA.end = rangeA.end._getTransformedByMove( b.sourcePosition, b.targetPosition, b.howMany );\n\n\t\treturn _makeMoveOperationsFromRanges( [ rangeA ], newTargetPosition );\n\t}\n\t//\n\t// End of special case #3.\n\t//\n\n\t//\n\t// Default case - ranges are on the same level or are not connected with each other.\n\t//\n\t// Modifier for default case.\n\t// Modifies `aIsStrong` flag in certain conditions.\n\t//\n\t// If only one of operations is a remove operation, we force remove operation to be the \"stronger\" one\n\t// to provide more expected results.\n\tif ( a.type == 'remove' && b.type != 'remove' && !context.aWasUndone && !context.forceWeakRemove ) {\n\t\taIsStrong = true;\n\t} else if ( a.type != 'remove' && b.type == 'remove' && !context.bWasUndone && !context.forceWeakRemove ) {\n\t\taIsStrong = false;\n\t}\n\n\t// Handle operation's source ranges - check how `rangeA` is affected by `b` operation.\n\t// This will aggregate transformed ranges.\n\tconst ranges = [];\n\n\t// Get the \"difference part\" of `a` operation source range.\n\t// This is an array with one or two ranges. Two ranges if `rangeB` is inside `rangeA`.\n\tconst difference = rangeA.getDifference( rangeB );\n\n\tfor ( const range of difference ) {\n\t\t// Transform those ranges by `b` operation. For example if `b` moved range from before those ranges, fix those ranges.\n\t\trange.start = range.start._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\t\trange.end = range.end._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\n\t\t// If `b` operation targets into `rangeA` on the same level, spread `rangeA` into two ranges.\n\t\tconst shouldSpread = compareArrays( range.start.getParentPath(), b.getMovedRangeStart().getParentPath() ) == 'same';\n\t\tconst newRanges = range._getTransformedByInsertion( b.getMovedRangeStart(), b.howMany, shouldSpread );\n\n\t\tranges.push( ...newRanges );\n\t}\n\n\t// Then, we have to manage the \"common part\" of both move ranges.\n\tconst common = rangeA.getIntersection( rangeB );\n\n\tif ( common !== null && aIsStrong ) {\n\t\t// Calculate the new position of that part of original range.\n\t\tcommon.start = common.start._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\t\tcommon.end = common.end._getCombined( b.sourcePosition, b.getMovedRangeStart() );\n\n\t\t// Take care of proper range order.\n\t\t//\n\t\t// Put `common` at appropriate place. Keep in mind that we are interested in original order.\n\t\t// Basically there are only three cases: there is zero, one or two difference ranges.\n\t\t//\n\t\t// If there is zero difference ranges, just push `common` in the array.\n\t\tif ( ranges.length === 0 ) {\n\t\t\tranges.push( common );\n\t\t}\n\t\t// If there is one difference range, we need to check whether common part was before it or after it.\n\t\telse if ( ranges.length == 1 ) {\n\t\t\tif ( rangeB.start.isBefore( rangeA.start ) || rangeB.start.isEqual( rangeA.start ) ) {\n\t\t\t\tranges.unshift( common );\n\t\t\t} else {\n\t\t\t\tranges.push( common );\n\t\t\t}\n\t\t}\n\t\t// If there are more ranges (which means two), put common part between them. This is the only scenario\n\t\t// where there could be two difference ranges so we don't have to make any comparisons.\n\t\telse {\n\t\t\tranges.splice( 1, 0, common );\n\t\t}\n\t}\n\n\tif ( ranges.length === 0 ) {\n\t\t// If there are no \"source ranges\", nothing should be changed.\n\t\t// Note that this can happen only if `aIsStrong == false` and `rangeA.isEqual( rangeB )`.\n\t\treturn [ new NoOperation( a.baseVersion ) ];\n\t}\n\n\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n} );\n\nsetTransformation( MoveOperation, SplitOperation, ( a, b, context ) => {\n\tlet newTargetPosition = a.targetPosition.clone();\n\n\t// Do not transform if target position is same as split insertion position and this split comes from undo.\n\t// This should be done on relations but it is too much work for now as it would require relations working in collaboration.\n\t// We need to make a decision how we will resolve such conflict and this is less harmful way.\n\tif ( !a.targetPosition.isEqual( b.insertionPosition ) || !b.graveyardPosition || context.abRelation == 'moveTargetAfter' ) {\n\t\tnewTargetPosition = a.targetPosition._getTransformedBySplitOperation( b );\n\t}\n\n\t// Case 1:\n\t//\n\t// Last element in the moved range got split.\n\t//\n\t// In this case the default range transformation will not work correctly as the element created by\n\t// split operation would be outside the range. The range to move needs to be fixed manually.\n\t//\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\n\tif ( moveRange.end.isEqual( b.insertionPosition ) ) {\n\t\t// Do it only if this is a \"natural\" split, not a one that comes from undo.\n\t\t// If this is undo split, only `targetPosition` needs to be changed (if the move is a remove).\n\t\tif ( !b.graveyardPosition ) {\n\t\t\ta.howMany++;\n\t\t}\n\n\t\ta.targetPosition = newTargetPosition;\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 2:\n\t//\n\t// Split happened between the moved nodes. In this case two ranges to move need to be generated.\n\t//\n\t// Characters `ozba` are moved to the end of paragraph `Xyz` but split happened.\n\t// <p>F[oz|ba]r</p><p>Xyz</p>\n\t//\n\t// After split:\n\t// <p>F[oz</p><p>ba]r</p><p>Xyz</p>\n\t//\n\t// Correct ranges:\n\t// <p>F[oz]</p><p>[ba]r</p><p>Xyz</p>\n\t//\n\t// After move:\n\t// <p>F</p><p>r</p><p>Xyzozba</p>\n\t//\n\tif ( moveRange.start.hasSameParentAs( b.splitPosition ) && moveRange.containsPosition( b.splitPosition ) ) {\n\t\tlet rightRange = new Range( b.splitPosition, moveRange.end );\n\t\trightRange = rightRange._getTransformedBySplitOperation( b );\n\n\t\tconst ranges = [\n\t\t\tnew Range( moveRange.start, b.splitPosition ),\n\t\t\trightRange\n\t\t];\n\n\t\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n\t}\n\n\t// Case 3:\n\t//\n\t// Move operation targets at the split position. We need to decide if the nodes should be inserted\n\t// at the end of the split element or at the beginning of the new element.\n\t//\n\tif ( a.targetPosition.isEqual( b.splitPosition ) && context.abRelation == 'insertAtSource' ) {\n\t\tnewTargetPosition = b.moveTargetPosition;\n\t}\n\n\t// Case 4:\n\t//\n\t// Move operation targets just after the split element. We need to decide if the nodes should be inserted\n\t// between two parts of split element, or after the new element.\n\t//\n\t// Split at `|`, while move operation moves `<p>Xyz</p>` and targets at `^`:\n\t// <p>Foo|bar</p>^<p>baz</p>\n\t// <p>Foo</p>^<p>bar</p><p>baz</p> or <p>Foo</p><p>bar</p>^<p>baz</p>?\n\t//\n\t// If there is no contextual information between operations (for example, they come from collaborative\n\t// editing), we don't want to put some unrelated content (move) between parts of related content (split parts).\n\t// However, if the split is from undo, in the past, the moved content might be targeting between the\n\t// split parts, meaning that was exactly user's intention:\n\t//\n\t// <p>Foo</p>^<p>bar</p>\t\t<--- original situation, in \"past\".\n\t// <p>Foobar</p>^\t\t\t\t<--- after merge target position is transformed.\n\t// <p>Foo|bar</p>^\t\t\t\t<--- then the merge is undone, and split happens, which leads us to current situation.\n\t//\n\t// In this case it is pretty clear that the intention was to put new paragraph between those nodes,\n\t// so we need to transform accordingly. We can detect this scenario thanks to relations.\n\t//\n\tif ( a.targetPosition.isEqual( b.insertionPosition ) && context.abRelation == 'insertBetween' ) {\n\t\tnewTargetPosition = a.targetPosition;\n\t}\n\n\t// The default case.\n\t//\n\tconst transformed = moveRange._getTransformedBySplitOperation( b );\n\tconst ranges = [ transformed ];\n\n\t// Case 5:\n\t//\n\t// Moved range contains graveyard element used by split operation. Add extra move operation to the result.\n\t//\n\tif ( b.graveyardPosition ) {\n\t\tconst movesGraveyardElement = moveRange.start.isEqual( b.graveyardPosition ) || moveRange.containsPosition( b.graveyardPosition );\n\n\t\tif ( a.howMany > 1 && movesGraveyardElement && !context.aWasUndone ) {\n\t\t\tranges.push( Range._createFromPositionAndShift( b.insertionPosition, 1 ) );\n\t\t}\n\t}\n\n\treturn _makeMoveOperationsFromRanges( ranges, newTargetPosition );\n} );\n\nsetTransformation( MoveOperation, MergeOperation, ( a, b, context ) => {\n\tconst movedRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\n\tif ( b.deletionPosition.hasSameParentAs( a.sourcePosition ) && movedRange.containsPosition( b.sourcePosition ) ) {\n\t\tif ( a.type == 'remove' && !context.forceWeakRemove ) {\n\t\t\t// Case 1:\n\t\t\t//\n\t\t\t// The element to remove got merged.\n\t\t\t//\n\t\t\t// Merge operation does support merging elements which are not siblings. So it would not be a problem\n\t\t\t// from technical point of view. However, if the element was removed, the intention of the user\n\t\t\t// deleting it was to have it all deleted. From user experience point of view, moving back the\n\t\t\t// removed nodes might be unexpected. This means that in this scenario we will reverse merging and remove the element.\n\t\t\t//\n\t\t\tif ( !context.aWasUndone ) {\n\t\t\t\tconst results = [];\n\n\t\t\t\tlet gyMoveSource = b.graveyardPosition.clone();\n\t\t\t\tlet splitNodesMoveSource = b.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\t\tif ( a.howMany > 1 ) {\n\t\t\t\t\tresults.push( new MoveOperation( a.sourcePosition, a.howMany - 1, a.targetPosition, 0 ) );\n\n\t\t\t\t\tgyMoveSource = gyMoveSource._getTransformedByMove( a.sourcePosition, a.targetPosition, a.howMany - 1 );\n\t\t\t\t\tsplitNodesMoveSource = splitNodesMoveSource._getTransformedByMove( a.sourcePosition, a.targetPosition, a.howMany - 1 );\n\t\t\t\t}\n\n\t\t\t\tconst gyMoveTarget = b.deletionPosition._getCombined( a.sourcePosition, a.targetPosition );\n\t\t\t\tconst gyMove = new MoveOperation( gyMoveSource, 1, gyMoveTarget, 0 );\n\n\t\t\t\tconst splitNodesMoveTargetPath = gyMove.getMovedRangeStart().path.slice();\n\t\t\t\tsplitNodesMoveTargetPath.push( 0 );\n\n\t\t\t\tconst splitNodesMoveTarget = new Position( gyMove.targetPosition.root, splitNodesMoveTargetPath );\n\t\t\t\tsplitNodesMoveSource = splitNodesMoveSource._getTransformedByMove( gyMoveSource, gyMoveTarget, 1 );\n\t\t\t\tconst splitNodesMove = new MoveOperation( splitNodesMoveSource, b.howMany, splitNodesMoveTarget, 0 );\n\n\t\t\t\tresults.push( gyMove );\n\t\t\t\tresults.push( splitNodesMove );\n\n\t\t\t\treturn results;\n\t\t\t}\n\t\t} else {\n\t\t\t// Case 2:\n\t\t\t//\n\t\t\t// The element to move got merged and it was the only element to move.\n\t\t\t// In this case just don't do anything, leave the node in the graveyard. Without special case\n\t\t\t// it would be a move operation that moves 0 nodes, so maybe it is better just to return no-op.\n\t\t\t//\n\t\t\tif ( a.howMany == 1 ) {\n\t\t\t\tif ( !context.bWasUndone ) {\n\t\t\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t\t\t} else {\n\t\t\t\t\ta.sourcePosition = b.graveyardPosition.clone();\n\t\t\t\t\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\t\t\t\t\treturn [ a ];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// The default case.\n\t//\n\tconst moveRange = Range._createFromPositionAndShift( a.sourcePosition, a.howMany );\n\tconst transformed = moveRange._getTransformedByMergeOperation( b );\n\n\ta.sourcePosition = transformed.start;\n\ta.howMany = transformed.end.offset - transformed.start.offset;\n\ta.targetPosition = a.targetPosition._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( RenameOperation, InsertOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByInsertOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, MergeOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// Element to rename got merged, so it was moved to `b.graveyardPosition`.\n\t//\n\tif ( a.position.isEqual( b.deletionPosition ) ) {\n\t\ta.position = b.graveyardPosition.clone();\n\t\ta.position.stickiness = 'toNext';\n\n\t\treturn [ a ];\n\t}\n\n\ta.position = a.position._getTransformedByMergeOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, MoveOperation, ( a, b ) => {\n\ta.position = a.position._getTransformedByMoveOperation( b );\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, RenameOperation, ( a, b, context ) => {\n\tif ( a.position.isEqual( b.position ) ) {\n\t\tif ( context.aIsStrong ) {\n\t\t\ta.oldName = b.newName;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( RenameOperation, SplitOperation, ( a, b ) => {\n\t// Case 1:\n\t//\n\t// The element to rename has been split. In this case, the new element should be also renamed.\n\t//\n\t// User decides to change the paragraph to a list item:\n\t// <paragraph>Foobar</paragraph>\n\t//\n\t// However, in meantime, split happens:\n\t// <paragraph>Foo</paragraph><paragraph>bar</paragraph>\n\t//\n\t// As a result, rename both elements:\n\t// <listItem>Foo</listItem><listItem>bar</listItem>\n\t//\n\tconst renamePath = a.position.path;\n\tconst splitPath = b.splitPosition.getParentPath();\n\n\tif ( compareArrays( renamePath, splitPath ) == 'same' && !b.graveyardPosition ) {\n\t\tconst extraRename = new RenameOperation( a.position.getShiftedBy( 1 ), a.oldName, a.newName, 0 );\n\n\t\treturn [ a, extraRename ];\n\t}\n\n\t// The default case.\n\t//\n\ta.position = a.position._getTransformedBySplitOperation( b );\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( RootAttributeOperation, RootAttributeOperation, ( a, b, context ) => {\n\tif ( a.root === b.root && a.key === b.key ) {\n\t\tif ( !context.aIsStrong || a.newValue === b.newValue ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t} else {\n\t\t\ta.oldValue = b.newValue;\n\t\t}\n\t}\n\n\treturn [ a ];\n} );\n\n// -----------------------\n\nsetTransformation( SplitOperation, InsertOperation, ( a, b ) => {\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.position ) && a.splitPosition.offset < b.position.offset ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedByInsertOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, MergeOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Split element got merged. If two different elements were merged, clients will have different content.\n\t//\n\t// Example. Merge at `{}`, split at `[]`:\n\t// <heading>Foo</heading>{}<paragraph>B[]ar</paragraph>\n\t//\n\t// On merge side it will look like this:\n\t// <heading>FooB[]ar</heading>\n\t// <heading>FooB</heading><heading>ar</heading>\n\t//\n\t// On split side it will look like this:\n\t// <heading>Foo</heading>{}<paragraph>B</paragraph><paragraph>ar</paragraph>\n\t// <heading>FooB</heading><paragraph>ar</paragraph>\n\t//\n\t// Clearly, the second element is different for both clients.\n\t//\n\t// We could use the removed merge element from graveyard as a split element but then clients would have a different\n\t// model state (in graveyard), because the split side client would still have an element in graveyard (removed by merge).\n\t//\n\t// To overcome this, in `SplitOperation` x `MergeOperation` transformation we will add additional `SplitOperation`\n\t// in the graveyard, which will actually clone the merged-and-deleted element. Then, that cloned element will be\n\t// used for splitting. Example below.\n\t//\n\t// Original state:\n\t// <heading>Foo</heading>{}<paragraph>B[]ar</paragraph>\n\t//\n\t// Merge side client:\n\t//\n\t// After merge:\n\t// <heading>FooB[]ar</heading> graveyard: <paragraph></paragraph>\n\t//\n\t// Extra split:\n\t// <heading>FooB[]ar</heading> graveyard: <paragraph></paragraph><paragraph></paragraph>\n\t//\n\t// Use the \"cloned\" element from graveyard:\n\t// <heading>FooB</heading><paragraph>ar</paragraph> graveyard: <paragraph></paragraph>\n\t//\n\t// Split side client:\n\t//\n\t// After split:\n\t// <heading>Foo</heading>{}<paragraph>B</paragraph><paragraph>ar</paragraph>\n\t//\n\t// After merge:\n\t// <heading>FooB</heading><paragraph>ar</paragraph> graveyard: <paragraph></paragraph>\n\t//\n\t// This special case scenario only applies if the original split operation clones the split element.\n\t// If the original split operation has `graveyardPosition` set, it all doesn't have sense because split operation\n\t// knows exactly which element it should use. So there would be no original problem with different contents.\n\t//\n\t// Additionally, the special case applies only if the merge wasn't already undone.\n\t//\n\tif ( !a.graveyardPosition && !context.bWasUndone && a.splitPosition.hasSameParentAs( b.sourcePosition ) ) {\n\t\tconst splitPath = b.graveyardPosition.path.slice();\n\t\tsplitPath.push( 0 );\n\n\t\tconst splitPosition = new Position( b.graveyardPosition.root, splitPath );\n\t\tconst insertionPosition = SplitOperation.getInsertionPosition( new Position( b.graveyardPosition.root, splitPath ) );\n\n\t\tconst additionalSplit = new SplitOperation( splitPosition, 0, null, 0 );\n\t\tadditionalSplit.insertionPosition = insertionPosition;\n\n\t\ta.splitPosition = a.splitPosition._getTransformedByMergeOperation( b );\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\t\ta.graveyardPosition = additionalSplit.insertionPosition.clone();\n\t\ta.graveyardPosition.stickiness = 'toNext';\n\n\t\treturn [ additionalSplit, a ];\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.deletionPosition ) && !a.splitPosition.isAfter( b.deletionPosition ) ) {\n\t\ta.howMany--;\n\t}\n\n\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) ) {\n\t\ta.howMany += b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedByMergeOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\tif ( a.graveyardPosition ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMergeOperation( b );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, MoveOperation, ( a, b, context ) => {\n\tconst rangeToMove = Range._createFromPositionAndShift( b.sourcePosition, b.howMany );\n\n\tif ( a.graveyardPosition ) {\n\t\t// Case 1:\n\t\t//\n\t\t// Split operation graveyard node was moved. In this case move operation is stronger. Since graveyard element\n\t\t// is already moved to the correct position, we need to only move the nodes after the split position.\n\t\t// This will be done by `MoveOperation` instead of `SplitOperation`.\n\t\t//\n\t\tconst gyElementMoved = rangeToMove.start.isEqual( a.graveyardPosition ) || rangeToMove.containsPosition( a.graveyardPosition );\n\n\t\tif ( !context.bWasUndone && gyElementMoved ) {\n\t\t\tconst sourcePosition = a.splitPosition._getTransformedByMoveOperation( b );\n\n\t\t\tconst newParentPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t\t\tconst newTargetPath = newParentPosition.path.slice();\n\t\t\tnewTargetPath.push( 0 );\n\n\t\t\tconst newTargetPosition = new Position( newParentPosition.root, newTargetPath );\n\t\t\tconst moveOp = new MoveOperation( sourcePosition, a.howMany, newTargetPosition, 0 );\n\n\t\t\treturn [ moveOp ];\n\t\t}\n\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedByMoveOperation( b );\n\t}\n\n\t// Case 2:\n\t//\n\t// If the split position is inside the moved range, we need to shift the split position to a proper place.\n\t// The position cannot be moved together with moved range because that would result in splitting of an incorrect element.\n\t//\n\t// Characters `bc` should be moved to the second paragraph while split position is between them:\n\t// <paragraph>A[b|c]d</paragraph><paragraph>Xyz</paragraph>\n\t//\n\t// After move, new split position is incorrect:\n\t// <paragraph>Ad</paragraph><paragraph>Xb|cyz</paragraph>\n\t//\n\t// Correct split position:\n\t// <paragraph>A|d</paragraph><paragraph>Xbcyz</paragraph>\n\t//\n\t// After split:\n\t// <paragraph>A</paragraph><paragraph>d</paragraph><paragraph>Xbcyz</paragraph>\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.sourcePosition ) && rangeToMove.containsPosition( a.splitPosition ) ) {\n\t\tconst howManyRemoved = b.howMany - ( a.splitPosition.offset - b.sourcePosition.offset );\n\t\ta.howMany -= howManyRemoved;\n\n\t\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) && a.splitPosition.offset < b.targetPosition.offset ) {\n\t\t\ta.howMany += b.howMany;\n\t\t}\n\n\t\ta.splitPosition = b.sourcePosition.clone();\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 3:\n\t//\n\t// Split is at a position where nodes were moved.\n\t//\n\t// This is a scenario described in `MoveOperation` x `SplitOperation` transformation but from the\n\t// \"split operation point of view\".\n\t//\n\tconst splitAtTarget = a.splitPosition.isEqual( b.targetPosition );\n\n\tif ( splitAtTarget && ( context.baRelation == 'insertAtSource' || context.abRelation == 'splitBefore' ) ) {\n\t\ta.howMany += b.howMany;\n\t\ta.splitPosition = a.splitPosition._getTransformedByDeletion( b.sourcePosition, b.howMany );\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\t\treturn [ a ];\n\t}\n\n\t// The default case.\n\t// Don't change `howMany` if move operation does not really move anything.\n\t//\n\tif ( !b.sourcePosition.isEqual( b.targetPosition ) ) {\n\t\tif ( a.splitPosition.hasSameParentAs( b.sourcePosition ) && a.splitPosition.offset <= b.sourcePosition.offset ) {\n\t\t\ta.howMany -= b.howMany;\n\t\t}\n\n\t\tif ( a.splitPosition.hasSameParentAs( b.targetPosition ) && a.splitPosition.offset < b.targetPosition.offset ) {\n\t\t\ta.howMany += b.howMany;\n\t\t}\n\t}\n\n\t// Change position stickiness to force a correct transformation.\n\ta.splitPosition.stickiness = 'toNone';\n\ta.splitPosition = a.splitPosition._getTransformedByMoveOperation( b );\n\ta.splitPosition.stickiness = 'toNext';\n\n\tif ( a.graveyardPosition ) {\n\t\ta.insertionPosition = a.insertionPosition._getTransformedByMoveOperation( b );\n\t} else {\n\t\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\t}\n\n\treturn [ a ];\n} );\n\nsetTransformation( SplitOperation, SplitOperation, ( a, b, context ) => {\n\t// Case 1:\n\t//\n\t// Split at the same position.\n\t//\n\t// If there already was a split at the same position as in `a` operation, it means that the intention\n\t// conveyed by `a` operation has already been fulfilled and `a` should not do anything (to avoid double split).\n\t//\n\t// However, there is a difference if these are new splits or splits created by undo. These have different\n\t// intentions. Also splits moving back different elements from graveyard have different intentions. They\n\t// are just different operations.\n\t//\n\t// So we cancel split operation only if it was really identical.\n\t//\n\t// Also, there is additional case, where split operations aren't identical and should not be cancelled, however the\n\t// default transformation is incorrect too.\n\t//\n\tif ( a.splitPosition.isEqual( b.splitPosition ) ) {\n\t\tif ( !a.graveyardPosition && !b.graveyardPosition ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\tif ( a.graveyardPosition && b.graveyardPosition && a.graveyardPosition.isEqual( b.graveyardPosition ) ) {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\n\t\t// Use context to know that the `a.splitPosition` should stay where it is.\n\t\t// This happens during undo when first a merge operation moved nodes to `a.splitPosition` and now `b` operation undoes that merge.\n\t\tif ( context.abRelation == 'splitBefore' ) {\n\t\t\t// Since split is at the same position, there are no nodes left to split.\n\t\t\ta.howMany = 0;\n\n\t\t\t// Note: there was `if ( a.graveyardPosition )` here but it was uncovered in tests and I couldn't find any scenarios for now.\n\t\t\t// That would have to be a `SplitOperation` that didn't come from undo but is transformed by operations that were undone.\n\t\t\t// It could happen if `context` is enabled in collaboration.\n\t\t\ta.graveyardPosition = a.graveyardPosition._getTransformedBySplitOperation( b );\n\n\t\t\treturn [ a ];\n\t\t}\n\t}\n\n\t// Case 2:\n\t//\n\t// Same node is using to split different elements. This happens in undo when previously same element was merged to\n\t// two different elements. This is described in `MergeOperation` x `MergeOperation` transformation.\n\t//\n\t// In this case we will follow the same logic. We will assume that `insertionPosition` is same for both\n\t// split operations. This might not always be true but in the real cases that were experienced it was. After all,\n\t// if these splits are reverses of merge operations that were merging the same element, then the `insertionPosition`\n\t// should be same for both of those splits.\n\t//\n\t// Again, we will decide which operation is stronger by checking if split happens in graveyard or in non-graveyard root.\n\t//\n\tif ( a.graveyardPosition && b.graveyardPosition && a.graveyardPosition.isEqual( b.graveyardPosition ) ) {\n\t\tconst aInGraveyard = a.splitPosition.root.rootName == '$graveyard';\n\t\tconst bInGraveyard = b.splitPosition.root.rootName == '$graveyard';\n\n\t\t// If `aIsWeak` it means that `a` points to graveyard while `b` doesn't. Don't move nodes then.\n\t\tconst aIsWeak = aInGraveyard && !bInGraveyard;\n\n\t\t// If `bIsWeak` it means that `b` points to graveyard while `a` doesn't. Force moving nodes then.\n\t\tconst bIsWeak = bInGraveyard && !aInGraveyard;\n\n\t\t// Force move if `b` is weak or neither operation is weak but `a` is stronger through `context.aIsStrong`.\n\t\tconst forceMove = bIsWeak || ( !aIsWeak && context.aIsStrong );\n\n\t\tif ( forceMove ) {\n\t\t\tconst result = [];\n\n\t\t\t// First we need to move any nodes split by `b` back to where they were.\n\t\t\t// Do it only if `b` actually moved something.\n\t\t\tif ( b.howMany ) {\n\t\t\t\tresult.push( new MoveOperation( b.moveTargetPosition, b.howMany, b.splitPosition, 0 ) );\n\t\t\t}\n\n\t\t\t// Then we need to move nodes from `a` split position to their new element.\n\t\t\t// Do it only if `a` actually should move something.\n\t\t\tif ( a.howMany ) {\n\t\t\t\tresult.push( new MoveOperation( a.splitPosition, a.howMany, a.moveTargetPosition, 0 ) );\n\t\t\t}\n\n\t\t\treturn result;\n\t\t} else {\n\t\t\treturn [ new NoOperation( 0 ) ];\n\t\t}\n\t}\n\n\tif ( a.graveyardPosition ) {\n\t\ta.graveyardPosition = a.graveyardPosition._getTransformedBySplitOperation( b );\n\t}\n\n\t// Case 3:\n\t//\n\t// Position where operation `b` inserted a new node after split is the same as the operation `a` split position.\n\t// As in similar cases, there is ambiguity if the split should be before the new node (created by `b`) or after.\n\t//\n\tif ( a.splitPosition.isEqual( b.insertionPosition ) && context.abRelation == 'splitBefore' ) {\n\t\ta.howMany++;\n\n\t\treturn [ a ];\n\t}\n\n\t// Case 4:\n\t//\n\t// This is a mirror to the case 2. above.\n\t//\n\tif ( b.splitPosition.isEqual( a.insertionPosition ) && context.baRelation == 'splitBefore' ) {\n\t\tconst newPositionPath = b.insertionPosition.path.slice();\n\t\tnewPositionPath.push( 0 );\n\n\t\tconst newPosition = new Position( b.insertionPosition.root, newPositionPath );\n\t\tconst moveOp = new MoveOperation( a.insertionPosition, 1, newPosition, 0 );\n\n\t\treturn [ a, moveOp ];\n\t}\n\n\t// The default case.\n\t//\n\tif ( a.splitPosition.hasSameParentAs( b.splitPosition ) && a.splitPosition.offset < b.splitPosition.offset ) {\n\t\ta.howMany -= b.howMany;\n\t}\n\n\ta.splitPosition = a.splitPosition._getTransformedBySplitOperation( b );\n\ta.insertionPosition = SplitOperation.getInsertionPosition( a.splitPosition );\n\n\treturn [ a ];\n} );\n\n// Checks whether `MoveOperation` `targetPosition` is inside a node from the moved range of the other `MoveOperation`.\n//\n// @private\n// @param {module:engine/model/operation/moveoperation~MoveOperation} a\n// @param {module:engine/model/operation/moveoperation~MoveOperation} b\n// @returns {Boolean}\nfunction _moveTargetIntoMovedRange( a, b ) {\n\treturn a.targetPosition._getTransformedByDeletion( b.sourcePosition, b.howMany ) === null;\n}\n\n// Helper function for `MoveOperation` x `MoveOperation` transformation. Converts given ranges and target position to\n// move operations and returns them.\n//\n// Ranges and target position will be transformed on-the-fly when generating operations.\n//\n// Given `ranges` should be in the order of how they were in the original transformed operation.\n//\n// Given `targetPosition` is the target position of the first range from `ranges`.\n//\n// @private\n// @param {Array.<module:engine/model/range~Range>} ranges\n// @param {module:engine/model/position~Position} targetPosition\n// @returns {Array.<module:engine/model/operation/moveoperation~MoveOperation>}\nfunction _makeMoveOperationsFromRanges( ranges, targetPosition ) {\n\t// At this moment we have some ranges and a target position, to which those ranges should be moved.\n\t// Order in `ranges` array is the go-to order of after transformation.\n\t//\n\t// We are almost done. We have `ranges` and `targetPosition` to make operations from.\n\t// Unfortunately, those operations may affect each other. Precisely, first operation after move\n\t// may affect source range and target position of second and third operation. Same with second\n\t// operation affecting third.\n\t//\n\t// We need to fix those source ranges and target positions once again, before converting `ranges` to operations.\n\tconst operations = [];\n\n\t// Keep in mind that nothing will be transformed if there is just one range in `ranges`.\n\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t// Create new operation out of a range and target position.\n\t\tconst range = ranges[ i ];\n\t\tconst op = new MoveOperation(\n\t\t\trange.start,\n\t\t\trange.end.offset - range.start.offset,\n\t\t\ttargetPosition,\n\t\t\t0\n\t\t);\n\n\t\toperations.push( op );\n\n\t\t// Transform other ranges by the generated operation.\n\t\tfor ( let j = i + 1; j < ranges.length; j++ ) {\n\t\t\t// All ranges in `ranges` array should be:\n\t\t\t//\n\t\t\t// * non-intersecting (these are part of original operation source range), and\n\t\t\t// * `targetPosition` does not target into them (opposite would mean that transformed operation targets \"inside itself\").\n\t\t\t//\n\t\t\t// This means that the transformation will be \"clean\" and always return one result.\n\t\t\tranges[ j ] = ranges[ j ]._getTransformedByMove( op.sourcePosition, op.targetPosition, op.howMany )[ 0 ];\n\t\t}\n\n\t\ttargetPosition = targetPosition._getTransformedByMove( op.sourcePosition, op.targetPosition, op.howMany );\n\t}\n\n\treturn operations;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/basecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { transformSets } from '@ckeditor/ckeditor5-engine/src/model/operation/transform';\n\n/**\n * Base class for undo feature commands: {@link module:undo/undocommand~UndoCommand} and {@link module:undo/redocommand~RedoCommand}.\n *\n * @protected\n * @extends module:core/command~Command\n */\nexport default class BaseCommand extends Command {\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Stack of items stored by the command. These are pairs of:\n\t\t *\n\t\t * * {@link module:engine/model/batch~Batch batch} saved by the command,\n\t\t * * {@link module:engine/model/selection~Selection selection} state at the moment of saving the batch.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array} #_stack\n\t\t */\n\t\tthis._stack = [];\n\n\t\t/**\n\t\t * Stores all batches that were created by this command.\n\t\t *\n\t\t * @protected\n\t\t * @member {WeakSet.<module:engine/model/batch~Batch>} #_createdBatches\n\t\t */\n\t\tthis._createdBatches = new WeakSet();\n\n\t\t// Refresh state, so the command is inactive right after initialization.\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this._stack.length > 0;\n\t}\n\n\t/**\n\t * Stores a batch in the command, together with the selection state of the {@link module:engine/model/document~Document document}\n\t * created by the editor which this command is registered to.\n\t *\n\t * @param {module:engine/model/batch~Batch} batch The batch to add.\n\t */\n\taddBatch( batch ) {\n\t\tconst docSelection = this.editor.model.document.selection;\n\n\t\tconst selection = {\n\t\t\tranges: docSelection.hasOwnRange ? Array.from( docSelection.getRanges() ) : [],\n\t\t\tisBackward: docSelection.isBackward\n\t\t};\n\n\t\tthis._stack.push( { batch, selection } );\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * Removes all items from the stack.\n\t */\n\tclearStack() {\n\t\tthis._stack = [];\n\t\tthis.refresh();\n\t}\n\n\t/**\n\t * Restores the {@link module:engine/model/document~Document#selection document selection} state after a batch was undone.\n\t *\n\t * @protected\n\t * @param {Array.<module:engine/model/range~Range>} ranges Ranges to be restored.\n\t * @param {Boolean} isBackward A flag describing whether the restored range was selected forward or backward.\n\t * @param {Array.<module:engine/model/operation/operation~Operation>} operations Operations which has been applied\n\t * since selection has been stored.\n\t */\n\t_restoreSelection( ranges, isBackward, operations ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\t// This will keep the transformed selection ranges.\n\t\tconst selectionRanges = [];\n\n\t\t// Transform all ranges from the restored selection.\n\t\tfor ( const range of ranges ) {\n\t\t\tconst transformed = transformSelectionRange( range, operations );\n\n\t\t\t// For each `range` from `ranges`, we take only one transformed range.\n\t\t\t// This is because we want to prevent situation where single-range selection\n\t\t\t// got transformed to multi-range selection. We will take the first range that\n\t\t\t// is not in the graveyard.\n\t\t\tconst newRange = transformed.find(\n\t\t\t\trange => range.start.root != document.graveyard\n\t\t\t);\n\n\t\t\t// `transformedRange` might be `undefined` if transformed range ended up in graveyard.\n\t\t\tif ( newRange ) {\n\t\t\t\tselectionRanges.push( newRange );\n\t\t\t}\n\t\t}\n\n\t\t// `selectionRanges` may be empty if all ranges ended up in graveyard. If that is the case, do not restore selection.\n\t\tif ( selectionRanges.length ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( selectionRanges, { backward: isBackward } );\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Undoes a batch by reversing that batch, transforming reversed batch and finally applying it.\n\t * This is a helper method for {@link #execute}.\n\t *\n\t * @protected\n\t * @param {module:engine/model/batch~Batch} batchToUndo The batch to be undone.\n\t * @param {module:engine/model/batch~Batch} undoingBatch The batch that will contain undoing changes.\n\t */\n\t_undo( batchToUndo, undoingBatch ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\t// All changes done by the command execution will be saved as one batch.\n\t\tthis._createdBatches.add( undoingBatch );\n\n\t\tconst operationsToUndo = batchToUndo.operations.slice().filter( operation => operation.isDocumentOperation );\n\t\toperationsToUndo.reverse();\n\n\t\t// We will process each operation from `batchToUndo`, in reverse order. If there were operations A, B and C in undone batch,\n\t\t// we need to revert them in reverse order, so first C' (reversed C), then B', then A'.\n\t\tfor ( const operationToUndo of operationsToUndo ) {\n\t\t\tconst nextBaseVersion = operationToUndo.baseVersion + 1;\n\t\t\tconst historyOperations = Array.from( document.history.getOperations( nextBaseVersion ) );\n\n\t\t\tconst transformedSets = transformSets(\n\t\t\t\t[ operationToUndo.getReversed() ],\n\t\t\t\thistoryOperations,\n\t\t\t\t{\n\t\t\t\t\tuseRelations: true,\n\t\t\t\t\tdocument: this.editor.model.document,\n\t\t\t\t\tpadWithNoOps: false,\n\t\t\t\t\tforceWeakRemove: true\n\t\t\t\t}\n\t\t\t);\n\n\t\t\tconst reversedOperations = transformedSets.operationsA;\n\n\t\t\t// After reversed operation has been transformed by all history operations, apply it.\n\t\t\tfor ( const operation of reversedOperations ) {\n\t\t\t\t// Before applying, add the operation to the `undoingBatch`.\n\t\t\t\tundoingBatch.addOperation( operation );\n\t\t\t\tmodel.applyOperation( operation );\n\n\t\t\t\tdocument.history.setOperationAsUndone( operationToUndo, operation );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Transforms given range `range` by given `operations`.\n// Returns an array containing one or more ranges, which are result of the transformation.\nfunction transformSelectionRange( range, operations ) {\n\tconst transformed = range.getTransformedByOperations( operations );\n\n\t// After `range` got transformed, we have an array of ranges. Some of those\n\t// ranges may be \"touching\" -- they can be next to each other and could be merged.\n\t// First, we have to sort those ranges to assure that they are in order.\n\ttransformed.sort( ( a, b ) => a.start.isBefore( b.start ) ? -1 : 1 );\n\n\t// Then, we check if two consecutive ranges are touching.\n\tfor ( let i = 1; i < transformed.length; i++ ) {\n\t\tconst a = transformed[ i - 1 ];\n\t\tconst b = transformed[ i ];\n\n\t\tif ( a.end.isTouching( b.start ) ) {\n\t\t\t// And join them together if they are.\n\t\t\ta.end = b.end;\n\t\t\ttransformed.splice( i, 1 );\n\t\t\ti--;\n\t\t}\n\t}\n\n\treturn transformed;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undocommand\n */\n\nimport BaseCommand from './basecommand';\n\n/**\n * The undo command stores {@link module:engine/model/batch~Batch batches} applied to the\n * {@link module:engine/model/document~Document document} and is able to undo a batch by reversing it and transforming by\n * batches from {@link module:engine/model/document~Document#history history} that happened after the reversed batch.\n *\n * The undo command also takes care of restoring the {@link module:engine/model/document~Document#selection document selection}.\n *\n * @extends module:undo/basecommand~BaseCommand\n */\nexport default class UndoCommand extends BaseCommand {\n\t/**\n\t * Executes the command. This method reverts a {@link module:engine/model/batch~Batch batch} added to the command's stack, transforms\n\t * and applies the reverted version on the {@link module:engine/model/document~Document document} and removes the batch from the stack.\n\t * Then, it restores the {@link module:engine/model/document~Document#selection document selection}.\n\t *\n\t * @fires execute\n\t * @fires revert\n\t * @param {module:engine/model/batch~Batch} [batch] A batch that should be undone. If not set, the last added batch will be undone.\n\t */\n\texecute( batch = null ) {\n\t\t// If batch is not given, set `batchIndex` to the last index in command stack.\n\t\tconst batchIndex = batch ? this._stack.findIndex( a => a.batch == batch ) : this._stack.length - 1;\n\n\t\tconst item = this._stack.splice( batchIndex, 1 )[ 0 ];\n\t\tconst undoingBatch = this.editor.model.createBatch( 'transparent' );\n\n\t\t// All changes has to be done in one `enqueueChange` callback so other listeners will not\n\t\t// step between consecutive operations, or won't do changes to the document before selection is properly restored.\n\t\tthis.editor.model.enqueueChange( undoingBatch, () => {\n\t\t\tthis._undo( item.batch, undoingBatch );\n\n\t\t\tconst operations = this.editor.model.document.history.getOperations( item.batch.baseVersion );\n\t\t\tthis._restoreSelection( item.selection.ranges, item.selection.isBackward, operations );\n\n\t\t\tthis.fire( 'revert', item.batch, undoingBatch );\n\t\t} );\n\n\t\tthis.refresh();\n\t}\n}\n\n/**\n * Fired when execution of the command reverts some batch.\n *\n * @event revert\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/redocommand\n */\n\nimport BaseCommand from './basecommand';\n\n/**\n * The redo command stores {@link module:engine/model/batch~Batch batches} that were used to undo a batch by\n * {@link module:undo/undocommand~UndoCommand}. It is able to redo a previously undone batch by reversing the undoing\n * batches created by `UndoCommand`. The reversed batch is transformed by all the batches from\n * {@link module:engine/model/document~Document#history history} that happened after the reversed undo batch.\n *\n * The redo command also takes care of restoring the {@link module:engine/model/document~Document#selection document selection}.\n *\n * @extends module:undo/basecommand~BaseCommand\n */\nexport default class RedoCommand extends BaseCommand {\n\t/**\n\t * Executes the command. This method reverts the last {@link module:engine/model/batch~Batch batch} added to\n\t * the command's stack, applies the reverted and transformed version on the\n\t * {@link module:engine/model/document~Document document} and removes the batch from the stack.\n\t * Then, it restores the {@link module:engine/model/document~Document#selection document selection}.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst item = this._stack.pop();\n\t\tconst redoingBatch = this.editor.model.createBatch( 'transparent' );\n\n\t\t// All changes have to be done in one `enqueueChange` callback so other listeners will not step between consecutive\n\t\t// operations, or won't do changes to the document before selection is properly restored.\n\t\tthis.editor.model.enqueueChange( redoingBatch, () => {\n\t\t\tconst lastOperation = item.batch.operations[ item.batch.operations.length - 1 ];\n\t\t\tconst nextBaseVersion = lastOperation.baseVersion + 1;\n\t\t\tconst operations = this.editor.model.document.history.getOperations( nextBaseVersion );\n\n\t\t\tthis._restoreSelection( item.selection.ranges, item.selection.isBackward, operations );\n\t\t\tthis._undo( item.batch, redoingBatch );\n\t\t} );\n\n\t\tthis.refresh();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undoediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport UndoCommand from './undocommand';\nimport RedoCommand from './redocommand';\n\n/**\n * The undo engine feature.\n *\n * It introduces the `'undo'` and `'redo'` commands to the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class UndoEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'UndoEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The command that manages undo {@link module:engine/model/batch~Batch batches} stack (history).\n\t\t * Created and registered during the {@link #init feature initialization}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:undo/undocommand~UndoCommand} #_undoCommand\n\t\t */\n\n\t\t/**\n\t\t * The command that manages redo {@link module:engine/model/batch~Batch batches} stack (history).\n\t\t * Created and registered during the {@link #init feature initialization}.\n\t\t *\n\t\t * @private\n\t\t * @member {module:undo/undocommand~UndoCommand} #_redoCommand\n\t\t */\n\n\t\t/**\n\t\t * Keeps track of which batches were registered in undo.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.<module:engine/model/batch~Batch>}\n\t\t */\n\t\tthis._batchRegistry = new WeakSet();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Create commands.\n\t\tthis._undoCommand = new UndoCommand( editor );\n\t\tthis._redoCommand = new RedoCommand( editor );\n\n\t\t// Register command to the editor.\n\t\teditor.commands.add( 'undo', this._undoCommand );\n\t\teditor.commands.add( 'redo', this._redoCommand );\n\n\t\tthis.listenTo( editor.model, 'applyOperation', ( evt, args ) => {\n\t\t\tconst operation = args[ 0 ];\n\n\t\t\t// Do not register batch if the operation is not a document operation.\n\t\t\t// This prevents from creating empty undo steps, where all operations where non-document operations.\n\t\t\t// Non-document operations creates and alters content in detached tree fragments (for example, document fragments).\n\t\t\t// Most of time this is preparing data before it is inserted into actual tree (for example during copy & paste).\n\t\t\t// Such operations should not be reversed.\n\t\t\tif ( !operation.isDocumentOperation ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst batch = operation.batch;\n\n\t\t\tconst isRedoBatch = this._redoCommand._createdBatches.has( batch );\n\t\t\tconst isUndoBatch = this._undoCommand._createdBatches.has( batch );\n\t\t\tconst isRegisteredBatch = this._batchRegistry.has( batch );\n\n\t\t\t// If changes are not a part of a batch or this is not a new batch, omit those changes.\n\t\t\tif ( isRegisteredBatch || ( batch.type == 'transparent' && !isRedoBatch && !isUndoBatch ) ) {\n\t\t\t\treturn;\n\t\t\t} else {\n\t\t\t\tif ( isRedoBatch ) {\n\t\t\t\t\t// If this batch comes from `redoCommand`, add it to `undoCommand` stack.\n\t\t\t\t\tthis._undoCommand.addBatch( batch );\n\t\t\t\t} else if ( !isUndoBatch ) {\n\t\t\t\t\t// A default batch - these are new changes in the document, not introduced by undo feature.\n\t\t\t\t\t// Add them to `undoCommand` stack and clear `redoCommand` stack.\n\t\t\t\t\tthis._undoCommand.addBatch( batch );\n\t\t\t\t\tthis._redoCommand.clearStack();\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add the batch to the registry so it will not be processed again.\n\t\t\tthis._batchRegistry.add( batch );\n\t\t}, { priority: 'highest' } );\n\n\t\tthis.listenTo( this._undoCommand, 'revert', ( evt, undoneBatch, undoingBatch ) => {\n\t\t\tthis._redoCommand.addBatch( undoingBatch );\n\t\t} );\n\n\t\teditor.keystrokes.set( 'CTRL+Z', 'undo' );\n\t\teditor.keystrokes.set( 'CTRL+Y', 'redo' );\n\t\teditor.keystrokes.set( 'CTRL+SHIFT+Z', 'redo' );\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M5.042 9.367l2.189 1.837a.75.75 0 0 1-.965 1.149l-3.788-3.18a.747.747 0 0 1-.21-.284.75.75 0 0 1 .17-.945L6.23 4.762a.75.75 0 1 1 .964 1.15L4.863 7.866h8.917A.75.75 0 0 1 14 7.9a4 4 0 1 1-1.477 7.718l.344-1.489a2.5 2.5 0 1 0 1.094-4.73l.008-.032H5.042z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module undo/undoui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport undoIcon from '../theme/icons/undo.svg';\nimport redoIcon from '../theme/icons/redo.svg';\n/**\n * The undo UI feature. It introduces the `'undo'` and `'redo'` buttons to the editor.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class UndoUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const locale = editor.locale;\n const t = editor.t;\n const localizedUndoIcon = locale.uiLanguageDirection == 'ltr' ? undoIcon : redoIcon;\n const localizedRedoIcon = locale.uiLanguageDirection == 'ltr' ? redoIcon : undoIcon;\n this._addButton('undo', t('bs'), 'CTRL+Z', localizedUndoIcon);\n this._addButton('redo', t('bt'), 'CTRL+Y', localizedRedoIcon);\n }\n /**\n\t * Creates a button for the specified command.\n\t *\n\t * @private\n\t * @param {String} name Command name.\n\t * @param {String} label Button label.\n\t * @param {String} keystroke Command keystroke.\n\t * @param {String} Icon Source of the icon.\n\t */\n _addButton(name, label, keystroke, Icon) {\n const editor = this.editor;\n editor.ui.componentFactory.add(name, locale => {\n const command = editor.commands.get(name);\n const view = new ButtonView(locale);\n view.set({\n label,\n icon: Icon,\n keystroke,\n tooltip: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n this.listenTo(view, 'execute', () => editor.execute(name));\n return view;\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module undo/undo\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport UndoEditing from './undoediting';\nimport UndoUI from './undoui';\n\n/**\n * The undo feature.\n *\n * This is a \"glue\" plugin which loads the {@link module:undo/undoediting~UndoEditing undo editing feature}\n * and {@link module:undo/undoui~UndoUI undo UI feature}.\n *\n * Below is the explanation of the undo mechanism working together with {@link module:engine/model/history~History History}:\n *\n * Whenever a {@link module:engine/model/operation/operation~Operation operation} is applied to the\n * {@link module:engine/model/document~Document document}, it is saved to `History` as is.\n * The {@link module:engine/model/batch~Batch batch} that owns that operation is also saved, in\n * {@link module:undo/undocommand~UndoCommand}, together with the selection that was present in the document before the\n * operation was applied. A batch is saved instead of the operation because changes are undone batch-by-batch, not operation-by-operation\n * and a batch is seen as one undo step.\n *\n * After some changes happen to the document, the `History` and `UndoCommand` stack can be represented as follows:\n *\n *\t\t History Undo stack\n *\t\t============== ==================================\n *\t\t[operation A1] [batch A]\n *\t\t[operation B1] [batch B]\n *\t\t[operation B2] [batch C]\n *\t\t[operation C1]\n *\t\t[operation C2]\n *\t\t[operation B3]\n *\t\t[operation C3]\n *\n * Where operations starting with the same letter are from same batch.\n *\n * Undoing a batch means that a set of operations which will reverse the effects of that batch needs to be generated.\n * For example, if a batch added several letters, undoing the batch should remove them. It is important to apply undoing\n * operations in the reversed order, so if a batch has operation `X`, `Y`, `Z`, reversed operations `Zr`, `Yr` and `Xr`\n * need to be applied. Otherwise reversed operation `Xr` would operate on a wrong document state, because operation `X`\n * does not know that operations `Y` and `Z` happened.\n *\n * After operations from an undone batch got {@link module:engine/model/operation/operation~Operation#getReversed reversed},\n * one needs to make sure if they are ready to be applied. In the scenario above, operation `C3` is the last operation and `C3r`\n * bases on up-to-date document state, so it can be applied to the document.\n *\n *\t\t History Undo stack\n *\t\t================= ==================================\n *\t\t[ operation A1 ] [ batch A ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ] [ processing undoing batch C ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\n * Next is operation `C2`, reversed to `C2r`. `C2r` bases on `C2`, so it bases on the wrong document state. It needs to be\n * transformed by operations from history that happened after it, so it \"knows\" about them. Let us assume that `C2' = C2r * B3 * C3 * C3r`,\n * where `*` means \"transformed by\". Rest of operations from that batch are processed in the same fashion.\n *\n *\t\t History Undo stack Redo stack\n *\t\t================= ================================== ==================================\n *\t\t[ operation A1 ] [ batch A ] [ batch Cr ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\t\t[ operation C2' ]\n *\t\t[ operation C1' ]\n *\n * Selective undo works on the same basis, however, instead of undoing the last batch in the undo stack, any batch can be undone.\n * The same algorithm applies: operations from a batch (i.e. `A1`) are reversed and then transformed by operations stored in history.\n *\n * Redo also is very similar to undo. It has its own stack that is filled with undoing (reversed batches). Operations from\n * batch that is re-done are reversed-back, transformed in proper order and applied to the document.\n *\n *\t\t History Undo stack Redo stack\n *\t\t================= ================================== ==================================\n *\t\t[ operation A1 ] [ batch A ]\n *\t\t[ operation B1 ] [ batch B ]\n *\t\t[ operation B2 ] [ batch Crr ]\n *\t\t[ operation C1 ]\n *\t\t[ operation C2 ]\n *\t\t[ operation B3 ]\n *\t\t[ operation C3 ]\n *\t\t[ operation C3r ]\n *\t\t[ operation C2' ]\n *\t\t[ operation C1' ]\n *\t\t[ operation C1'r]\n *\t\t[ operation C2'r]\n *\t\t[ operation C3rr]\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Undo extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ UndoEditing, UndoUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Undo';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module core/pendingactions\n */\n\nimport Plugin from './plugin';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * The list of pending editor actions.\n *\n * This plugin should be used to synchronise plugins that execute long-lasting actions\n * (e.g. file upload) with the editor integration. It gives the developer who integrates the editor\n * an easy way to check if there are any actions pending whenever such information is needed.\n * All plugins that register a pending action also provide a message about the action that is ongoing\n * which can be displayed to the user. This lets them decide if they want to interrupt the action or wait.\n *\n * Adding and updating a pending action:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n * \t\tconst action = pendingActions.add( 'Upload in progress: 0%.' );\n *\n *\t\t// You can update the message:\n * \t\taction.message = 'Upload in progress: 10%.';\n *\n * Removing a pending action:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n * \t\tconst action = pendingActions.add( 'Unsaved changes.' );\n *\n * \t\tpendingActions.remove( action );\n *\n * Getting pending actions:\n *\n * \t\tconst pendingActions = editor.plugins.get( 'PendingActions' );\n *\n * \t\tconst action1 = pendingActions.add( 'Action 1' );\n * \t\tconst action2 = pendingActions.add( 'Action 2' );\n *\n * \t\tpendingActions.first; // Returns action1\n * \t\tArray.from( pendingActions ); // Returns [ action1, action2 ]\n *\n * This plugin is used by features like {@link module:upload/filerepository~FileRepository} to register their ongoing actions\n * and by features like {@link module:autosave/autosave~Autosave} to detect whether there are any ongoing actions.\n * Read more about saving the data in the {@glink builds/guides/integration/saving-data Saving and getting data} guide.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class PendingActions extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'PendingActions';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\t/**\n\t\t * Defines whether there is any registered pending action.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #hasAny\n\t\t */\n\t\tthis.set( 'hasAny', false );\n\n\t\t/**\n\t\t * A list of pending actions.\n\t\t *\n\t\t * @private\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis._actions = new Collection( { idProperty: '_id' } );\n\t\tthis._actions.delegate( 'add', 'remove' ).to( this );\n\t}\n\n\t/**\n\t * Adds an action to the list of pending actions.\n\t *\n\t * This method returns an action object with an observable message property.\n\t * The action object can be later used in the {@link #remove} method. It also allows you to change the message.\n\t *\n\t * @param {String} message The action message.\n\t * @returns {Object} An observable object that represents a pending action.\n\t */\n\tadd( message ) {\n\t\tif ( typeof message !== 'string' ) {\n\t\t\t/**\n\t\t\t * The message must be a string.\n\t\t\t *\n\t\t\t * @error pendingactions-add-invalid-message\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'pendingactions-add-invalid-message: The message must be a string.', this );\n\t\t}\n\n\t\tconst action = Object.create( ObservableMixin );\n\n\t\taction.set( 'message', message );\n\t\tthis._actions.add( action );\n\t\tthis.hasAny = true;\n\n\t\treturn action;\n\t}\n\n\t/**\n\t * Removes an action from the list of pending actions.\n\t *\n\t * @param {Object} action An action object.\n\t */\n\tremove( action ) {\n\t\tthis._actions.remove( action );\n\t\tthis.hasAny = !!this._actions.length;\n\t}\n\n\t/**\n\t * Returns the first action from the list or null when list is empty\n\t *\n\t * returns {Object|null} The pending action object.\n\t */\n\tget first() {\n\t\treturn this._actions.get( 0 );\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this._actions[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Fired when an action is added to the list.\n\t *\n\t * @event add\n\t * @param {Object} action The added action.\n\t */\n\n\t/**\n\t * Fired when an action is removed from the list.\n\t *\n\t * @event remove\n\t * @param {Object} action The removed action.\n\t */\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module upload/filereader\n */\n\n/* globals window */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Wrapper over the native `FileReader`.\n */\nexport default class FileReader {\n\t/**\n\t * Creates an instance of the FileReader.\n\t */\n\tconstructor() {\n\t\tconst reader = new window.FileReader();\n\n\t\t/**\n\t\t * Instance of native FileReader.\n\t\t *\n\t\t * @private\n\t\t * @member {FileReader} #_reader\n\t\t */\n\t\tthis._reader = reader;\n\n\t\tthis._data = undefined;\n\n\t\t/**\n\t\t * Number of bytes loaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #loaded\n\t\t */\n\t\tthis.set( 'loaded', 0 );\n\n\t\treader.onprogress = evt => {\n\t\t\tthis.loaded = evt.loaded;\n\t\t};\n\t}\n\n\t/**\n\t * Returns error that occurred during file reading.\n\t *\n\t * @returns {Error}\n\t */\n\tget error() {\n\t\treturn this._reader.error;\n\t}\n\n\t/**\n\t * Holds the data of an already loaded file. The file must be first loaded\n\t * by using {@link module:upload/filereader~FileReader#read `read()`}.\n\t *\n\t * @type {File|undefined}\n\t */\n\tget data() {\n\t\treturn this._data;\n\t}\n\n\t/**\n\t * Reads the provided file.\n\t *\n\t * @param {File} file Native File object.\n\t * @returns {Promise.<String>} Returns a promise that will be resolved with file's content.\n\t * The promise will be rejected in case of an error or when the reading process is aborted.\n\t */\n\tread( file ) {\n\t\tconst reader = this._reader;\n\t\tthis.total = file.size;\n\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\treader.onload = () => {\n\t\t\t\tconst result = reader.result;\n\n\t\t\t\tthis._data = result;\n\n\t\t\t\tresolve( result );\n\t\t\t};\n\n\t\t\treader.onerror = () => {\n\t\t\t\treject( 'error' );\n\t\t\t};\n\n\t\t\treader.onabort = () => {\n\t\t\t\treject( 'aborted' );\n\t\t\t};\n\n\t\t\tthis._reader.readAsDataURL( file );\n\t\t} );\n\t}\n\n\t/**\n\t * Aborts file reader.\n\t */\n\tabort() {\n\t\tthis._reader.abort();\n\t}\n}\n\nmix( FileReader, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module upload/filerepository\n */\n/* globals console */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport PendingActions from '@ckeditor/ckeditor5-core/src/pendingactions';\nimport CKEditorError, { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport FileReader from './filereader.js';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid.js';\n/**\n * File repository plugin. A central point for managing file upload.\n *\n * To use it, first you need an upload adapter. Upload adapter's job is to handle communication with the server\n * (sending the file and handling server's response). You can use one of the existing plugins introducing upload adapters\n * (e.g. {@link module:easy-image/cloudservicesuploadadapter~CloudServicesUploadAdapter} or\n * {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter}) or write your own one – see\n * the {@glink framework/guides/deep-dive/upload-adapter \"Custom image upload adapter\" deep dive guide}.\n *\n * Then, you can use {@link module:upload/filerepository~FileRepository#createLoader `createLoader()`} and the returned\n * {@link module:upload/filerepository~FileLoader} instance to load and upload files.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class FileRepository extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'FileRepository';\n }\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [PendingActions];\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n /**\n\t\t * Collection of loaders associated with this repository.\n\t\t *\n\t\t * @member {module:utils/collection~Collection} #loaders\n\t\t */\n this.loaders = new Collection();\n // Keeps upload in a sync with pending actions.\n this.loaders.on('add', () => this._updatePendingAction());\n this.loaders.on('remove', () => this._updatePendingAction());\n /**\n\t\t * Loaders mappings used to retrieve loaders references.\n\t\t *\n\t\t * @private\n\t\t * @member {Map<File|Promise, FileLoader>} #_loadersMap\n\t\t */\n this._loadersMap = new Map();\n /**\n\t\t * Reference to a pending action registered in a {@link module:core/pendingactions~PendingActions} plugin\n\t\t * while upload is in progress. When there is no upload then value is `null`.\n\t\t *\n\t\t * @private\n\t\t * @member {Object} #_pendingAction\n\t\t */\n this._pendingAction = null;\n /**\n\t\t * A factory function which should be defined before using `FileRepository`.\n\t\t *\n\t\t * It should return a new instance of {@link module:upload/filerepository~UploadAdapter} that will be used to upload files.\n\t\t * {@link module:upload/filerepository~FileLoader} instance associated with the adapter\n\t\t * will be passed to that function.\n\t\t *\n\t\t * For more information and example see {@link module:upload/filerepository~UploadAdapter}.\n\t\t *\n\t\t * @member {Function} #createUploadAdapter\n\t\t */\n /**\n\t\t * Number of bytes uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploaded\n\t\t */\n this.set('uploaded', 0);\n /**\n\t\t * Number of total bytes to upload.\n\t\t *\n\t\t * It might be different than the file size because of headers and additional data.\n\t\t * It contains `null` if value is not available yet, so it's better to use {@link #uploadedPercent} to monitor\n\t\t * the progress.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number|null} #uploadTotal\n\t\t */\n this.set('uploadTotal', null);\n /**\n\t\t * Upload progress in percents.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploadedPercent\n\t\t */\n this.bind('uploadedPercent').to(this, 'uploaded', this, 'uploadTotal', (uploaded, total) => {\n return total ? uploaded / total * 100 : 0;\n });\n }\n /**\n\t * Returns the loader associated with specified file or promise.\n\t *\n\t * To get loader by id use `fileRepository.loaders.get( id )`.\n\t *\n\t * @param {File|Promise.<File>} fileOrPromise Native file or promise handle.\n\t * @returns {module:upload/filerepository~FileLoader|null}\n\t */\n getLoader(fileOrPromise) {\n return this._loadersMap.get(fileOrPromise) || null;\n }\n /**\n\t * Creates a loader instance for the given file.\n\t *\n\t * Requires {@link #createUploadAdapter} factory to be defined.\n\t *\n\t * @param {File|Promise.<File>} fileOrPromise Native File object or native Promise object which resolves to a File.\n\t * @returns {module:upload/filerepository~FileLoader|null}\n\t */\n createLoader(fileOrPromise) {\n if (!this.createUploadAdapter) {\n /**\n\t\t\t * You need to enable an upload adapter in order to be able to upload files.\n\t\t\t *\n\t\t\t * This warning shows up when {@link module:upload/filerepository~FileRepository} is being used\n\t\t\t * without {@link #createUploadAdapter definining an upload adapter}.\n\t\t\t *\n\t\t\t * **If you see this warning when using one of the {@glink builds/index CKEditor 5 Builds}**\n\t\t\t * it means that you did not configure any of the upload adapters available by default in those builds.\n\t\t\t *\n\t\t\t * See the {@glink features/image-upload/image-upload comprehensive \"Image upload overview\"} to learn which upload\n\t\t\t * adapters are available in the builds and how to configure them.\n\t\t\t *\n\t\t\t * **If you see this warning when using a custom build** there is a chance that you enabled\n\t\t\t * a feature like {@link module:image/imageupload~ImageUpload},\n\t\t\t * or {@link module:image/imageupload/imageuploadui~ImageUploadUI} but you did not enable any upload adapter.\n\t\t\t * You can choose one of the existing upload adapters listed in the\n\t\t\t * {@glink features/image-upload/image-upload \"Image upload overview\"}.\n\t\t\t *\n\t\t\t * You can also implement your {@glink framework/guides/deep-dive/upload-adapter own image upload adapter}.\n\t\t\t *\n\t\t\t * @error filerepository-no-upload-adapter\n\t\t\t */\n console.warn(attachLinkToDocumentation('filerepository-no-upload-adapter: Upload adapter is not defined.'));\n return null;\n }\n const loader = new FileLoader(Promise.resolve(fileOrPromise), this.createUploadAdapter);\n this.loaders.add(loader);\n this._loadersMap.set(fileOrPromise, loader);\n // Store also file => loader mapping so loader can be retrieved by file instance returned upon Promise resolution.\n if (fileOrPromise instanceof Promise) {\n loader.file.then(file => {\n this._loadersMap.set(file, loader);\n }) // Every then() must have a catch().\n // File loader state (and rejections) are handled in read() and upload().\n // Also, see the \"does not swallow the file promise rejection\" test.\n.catch(() => {\n });\n }\n loader.on('change:uploaded', () => {\n let aggregatedUploaded = 0;\n for (const loader of this.loaders) {\n aggregatedUploaded += loader.uploaded;\n }\n this.uploaded = aggregatedUploaded;\n });\n loader.on('change:uploadTotal', () => {\n let aggregatedTotal = 0;\n for (const loader of this.loaders) {\n if (loader.uploadTotal) {\n aggregatedTotal += loader.uploadTotal;\n }\n }\n this.uploadTotal = aggregatedTotal;\n });\n return loader;\n }\n /**\n\t * Destroys the given loader.\n\t *\n\t * @param {File|Promise|module:upload/filerepository~FileLoader} fileOrPromiseOrLoader File or Promise associated\n\t * with that loader or loader itself.\n\t */\n destroyLoader(fileOrPromiseOrLoader) {\n const loader = fileOrPromiseOrLoader instanceof FileLoader ? fileOrPromiseOrLoader : this.getLoader(fileOrPromiseOrLoader);\n loader._destroy();\n this.loaders.remove(loader);\n this._loadersMap.forEach((value, key) => {\n if (value === loader) {\n this._loadersMap.delete(key);\n }\n });\n }\n /**\n\t * Registers or deregisters pending action bound with upload progress.\n\t *\n\t * @private\n\t */\n _updatePendingAction() {\n const pendingActions = this.editor.plugins.get(PendingActions);\n if (this.loaders.length) {\n if (!this._pendingAction) {\n const t = this.editor.t;\n const getMessage = value => `${ t('ay') } ${ parseInt(value) }%.`;\n this._pendingAction = pendingActions.add(getMessage(this.uploadedPercent));\n this._pendingAction.bind('message').to(this, 'uploadedPercent', getMessage);\n }\n } else {\n pendingActions.remove(this._pendingAction);\n this._pendingAction = null;\n }\n }\n}\nmix(FileRepository, ObservableMixin);\n/**\n * File loader class.\n *\n * It is used to control the process of reading the file and uploading it using the specified upload adapter.\n */\nclass FileLoader {\n /**\n\t * Creates a new instance of `FileLoader`.\n\t *\n\t * @param {Promise.<File>} filePromise A promise which resolves to a file instance.\n\t * @param {Function} uploadAdapterCreator The function which returns {@link module:upload/filerepository~UploadAdapter} instance.\n\t */\n constructor(filePromise, uploadAdapterCreator) {\n /**\n\t\t * Unique id of FileLoader instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n this.id = uid();\n /**\n\t\t * Additional wrapper over the initial file promise passed to this loader.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/filerepository~FilePromiseWrapper}\n\t\t */\n this._filePromiseWrapper = this._createFilePromiseWrapper(filePromise);\n /**\n\t\t * Adapter instance associated with this file loader.\n\t\t *\n\t\t * @private\n\t\t * @member {module:upload/filerepository~UploadAdapter}\n\t\t */\n this._adapter = uploadAdapterCreator(this);\n /**\n\t\t * FileReader used by FileLoader.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/filereader~FileReader}\n\t\t */\n this._reader = new FileReader();\n /**\n\t\t * Current status of FileLoader. It can be one of the following:\n\t\t *\n\t\t * * 'idle',\n\t\t * * 'reading',\n\t\t * * 'uploading',\n\t\t * * 'aborted',\n\t\t * * 'error'.\n\t\t *\n\t\t * When reading status can change in a following way:\n\t\t *\n\t\t * `idle` -> `reading` -> `idle`\n\t\t * `idle` -> `reading -> `aborted`\n\t\t * `idle` -> `reading -> `error`\n\t\t *\n\t\t * When uploading status can change in a following way:\n\t\t *\n\t\t * `idle` -> `uploading` -> `idle`\n\t\t * `idle` -> `uploading` -> `aborted`\n\t\t * `idle` -> `uploading` -> `error`\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {String} #status\n\t\t */\n this.set('status', 'idle');\n /**\n\t\t * Number of bytes uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploaded\n\t\t */\n this.set('uploaded', 0);\n /**\n\t\t * Number of total bytes to upload.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number|null} #uploadTotal\n\t\t */\n this.set('uploadTotal', null);\n /**\n\t\t * Upload progress in percents.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #uploadedPercent\n\t\t */\n this.bind('uploadedPercent').to(this, 'uploaded', this, 'uploadTotal', (uploaded, total) => {\n return total ? uploaded / total * 100 : 0;\n });\n /**\n\t\t * Response of the upload.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Object|null} #uploadResponse\n\t\t */\n this.set('uploadResponse', null);\n }\n /**\n\t * A `Promise` which resolves to a `File` instance associated with this file loader.\n\t *\n\t * @type {Promise.<File|null>}\n\t */\n get file() {\n if (!this._filePromiseWrapper) {\n // Loader was destroyed, return promise which resolves to null.\n return Promise.resolve(null);\n } else {\n // The `this._filePromiseWrapper.promise` is chained and not simply returned to handle a case when:\n //\n //\t\t* The `loader.file.then( ... )` is called by external code (returned promise is pending).\n //\t\t* Then `loader._destroy()` is called (call is synchronous) which destroys the `loader`.\n //\t\t* Promise returned by the first `loader.file.then( ... )` call is resolved.\n //\n // Returning `this._filePromiseWrapper.promise` will still resolve to a `File` instance so there\n // is an additional check needed in the chain to see if `loader` was destroyed in the meantime.\n return this._filePromiseWrapper.promise.then(file => this._filePromiseWrapper ? file : null);\n }\n }\n /**\n\t * Returns the file data. To read its data, you need for first load the file\n\t * by using the {@link module:upload/filerepository~FileLoader#read `read()`} method.\n\t *\n\t * @type {File|undefined}\n\t */\n get data() {\n return this._reader.data;\n }\n /**\n\t * Reads file using {@link module:upload/filereader~FileReader}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `filerepository-read-wrong-status` when status\n\t * is different than `idle`.\n\t *\n\t * Example usage:\n\t *\n\t *\tfileLoader.read()\n\t *\t\t.then( data => { ... } )\n\t *\t\t.catch( err => {\n\t *\t\t\tif ( err === 'aborted' ) {\n\t *\t\t\t\tconsole.log( 'Reading aborted.' );\n\t *\t\t\t} else {\n\t *\t\t\t\tconsole.log( 'Reading error.', err );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @returns {Promise.<String>} Returns promise that will be resolved with read data. Promise will be rejected if error\n\t * occurs or if read process is aborted.\n\t */\n read() {\n if (this.status != 'idle') {\n throw new CKEditorError('filerepository-read-wrong-status: You cannot call read if the status is different than idle.', this);\n }\n this.status = 'reading';\n return this.file.then(file => this._reader.read(file)).then(data => {\n // Edge case: reader was aborted after file was read - double check for proper status.\n if (this.status !== 'reading') {\n throw this.status;\n }\n this.status = 'idle';\n return data;\n }).catch(err => {\n if (err === 'aborted') {\n this.status = 'aborted';\n throw 'aborted';\n }\n this.status = 'error';\n throw this._reader.error ? this._reader.error : err;\n });\n }\n /**\n\t * Reads file using the provided {@link module:upload/filerepository~UploadAdapter}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `filerepository-upload-wrong-status` when status\n\t * is different than `idle`.\n\t * Example usage:\n\t *\n\t *\tfileLoader.upload()\n\t *\t\t.then( data => { ... } )\n\t *\t\t.catch( e => {\n\t *\t\t\tif ( e === 'aborted' ) {\n\t *\t\t\t\tconsole.log( 'Uploading aborted.' );\n\t *\t\t\t} else {\n\t *\t\t\t\tconsole.log( 'Uploading error.', e );\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * @returns {Promise.<Object>} Returns promise that will be resolved with response data. Promise will be rejected if error\n\t * occurs or if read process is aborted.\n\t */\n upload() {\n if (this.status != 'idle') {\n throw new CKEditorError('filerepository-upload-wrong-status: You cannot call upload if the status is different than idle.', this);\n }\n this.status = 'uploading';\n return this.file.then(() => this._adapter.upload()).then(data => {\n this.uploadResponse = data;\n this.status = 'idle';\n return data;\n }).catch(err => {\n if (this.status === 'aborted') {\n throw 'aborted';\n }\n this.status = 'error';\n throw err;\n });\n }\n /**\n\t * Aborts loading process.\n\t */\n abort() {\n const status = this.status;\n this.status = 'aborted';\n if (!this._filePromiseWrapper.isFulfilled) {\n // Edge case: file loader is aborted before read() is called\n // so it might happen that no one handled the rejection of this promise.\n // See https://github.com/ckeditor/ckeditor5-upload/pull/100\n this._filePromiseWrapper.promise.catch(() => {\n });\n this._filePromiseWrapper.rejecter('aborted');\n } else if (status == 'reading') {\n this._reader.abort();\n } else if (status == 'uploading' && this._adapter.abort) {\n this._adapter.abort();\n }\n this._destroy();\n }\n /**\n\t * Performs cleanup.\n\t *\n\t * @private\n\t */\n _destroy() {\n this._filePromiseWrapper = undefined;\n this._reader = undefined;\n this._adapter = undefined;\n this.uploadResponse = undefined;\n }\n /**\n\t * Wraps a given file promise into another promise giving additional\n\t * control (resolving, rejecting, checking if fulfilled) over it.\n\t *\n\t * @private\n\t * @param filePromise The initial file promise to be wrapped.\n\t * @returns {module:upload/filerepository~FilePromiseWrapper}\n\t */\n _createFilePromiseWrapper(filePromise) {\n const wrapper = {};\n wrapper.promise = new Promise((resolve, reject) => {\n wrapper.rejecter = reject;\n wrapper.isFulfilled = false;\n filePromise.then(file => {\n wrapper.isFulfilled = true;\n resolve(file);\n }).catch(err => {\n wrapper.isFulfilled = true;\n reject(err);\n });\n });\n return wrapper;\n }\n}\nmix(FileLoader, ObservableMixin); /**\n * Upload adapter interface used by the {@link module:upload/filerepository~FileRepository file repository}\n * to handle file upload. An upload adapter is a bridge between the editor and server that handles file uploads.\n * It should contain a logic necessary to initiate an upload process and monitor its progress.\n *\n * Learn how to develop your own upload adapter for CKEditor 5 in the\n * {@glink framework/guides/deep-dive/upload-adapter \"Custom upload adapter\" guide}.\n *\n * @interface UploadAdapter\n */\n /**\n * Executes the upload process.\n * This method should return a promise that will resolve when data will be uploaded to server. Promise should be\n * resolved with an object containing information about uploaded file:\n *\n *\t\t{\n *\t\t\tdefault: 'http://server/default-size.image.png'\n *\t\t}\n *\n * Additionally, other image sizes can be provided:\n *\n *\t\t{\n *\t\t\tdefault: 'http://server/default-size.image.png',\n *\t\t\t'160': 'http://server/size-160.image.png',\n *\t\t\t'500': 'http://server/size-500.image.png',\n *\t\t\t'1000': 'http://server/size-1000.image.png',\n *\t\t\t'1052': 'http://server/default-size.image.png'\n *\t\t}\n *\n * NOTE: When returning multiple images, the widest returned one should equal the default one. It is essential to\n * correctly set `width` attribute of the image. See this discussion:\n * https://github.com/ckeditor/ckeditor5-easy-image/issues/4 for more information.\n *\n * Take a look at {@link module:upload/filerepository~UploadAdapter example Adapter implementation} and\n * {@link module:upload/filerepository~FileRepository#createUploadAdapter createUploadAdapter method}.\n *\n * @method module:upload/filerepository~UploadAdapter#upload\n * @returns {Promise.<Object>} Promise that should be resolved when data is uploaded.\n */\n /**\n * Aborts the upload process.\n * After aborting it should reject promise returned from {@link #upload upload()}.\n *\n * Take a look at {@link module:upload/filerepository~UploadAdapter example Adapter implementation} and\n * {@link module:upload/filerepository~FileRepository#createUploadAdapter createUploadAdapter method}.\n *\n * @method module:upload/filerepository~UploadAdapter#abort\n */\n /**\n * Object returned by {@link module:upload/filerepository~FileLoader#_createFilePromiseWrapper} method\n * to add more control over the initial file promise passed to {@link module:upload/filerepository~FileLoader}.\n *\n * @protected\n * @typedef {Object} module:upload/filerepository~FilePromiseWrapper\n * @property {Promise.<File>} promise Wrapper promise which can be chained for further processing.\n * @property {Function} rejecter Rejects the promise when called.\n * @property {Boolean} isFulfilled Whether original promise is already fulfilled.\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module adapter-ckfinder/utils\n */\n\nconst TOKEN_COOKIE_NAME = 'ckCsrfToken';\nconst TOKEN_LENGTH = 40;\nconst tokenCharset = 'abcdefghijklmnopqrstuvwxyz0123456789';\n\n/**\n * Returns the CSRF token value. The value is a hash stored in `document.cookie`\n * under the `ckCsrfToken` key. The CSRF token can be used to secure the communication\n * between the web browser and the CKFinder server.\n *\n * @returns {String}\n */\nexport function getCsrfToken() {\n\tlet token = getCookie( TOKEN_COOKIE_NAME );\n\n\tif ( !token || token.length != TOKEN_LENGTH ) {\n\t\ttoken = generateToken( TOKEN_LENGTH );\n\t\tsetCookie( TOKEN_COOKIE_NAME, token );\n\t}\n\n\treturn token;\n}\n\n/**\n * Returns the value of the cookie with a given name or `null` if the cookie is not found.\n *\n * @param {String} name\n * @returns {String|null}\n */\nexport function getCookie( name ) {\n\tname = name.toLowerCase();\n\tconst parts = document.cookie.split( ';' );\n\n\tfor ( const part of parts ) {\n\t\tconst pair = part.split( '=' );\n\t\tconst key = decodeURIComponent( pair[ 0 ].trim().toLowerCase() );\n\n\t\tif ( key === name ) {\n\t\t\treturn decodeURIComponent( pair[ 1 ] );\n\t\t}\n\t}\n\n\treturn null;\n}\n\n/**\n * Sets the value of the cookie with a given name.\n *\n * @param {String} name\n * @param {String} value\n */\nexport function setCookie( name, value ) {\n\tdocument.cookie = encodeURIComponent( name ) + '=' + encodeURIComponent( value ) + ';path=/';\n}\n\n// Generates the CSRF token with the given length.\n//\n// @private\n// @param {Number} length\n// @returns {string}\nfunction generateToken( length ) {\n\tlet result = '';\n\tconst randValues = new Uint8Array( length );\n\n\twindow.crypto.getRandomValues( randValues );\n\n\tfor ( let j = 0; j < randValues.length; j++ ) {\n\t\tconst character = tokenCharset.charAt( randValues[ j ] % tokenCharset.length );\n\t\tresult += Math.random() > 0.5 ? character.toUpperCase() : character;\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/* globals XMLHttpRequest, FormData */\n/**\n * @module adapter-ckfinder/uploadadapter\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport { getCsrfToken } from './utils';\n/**\n * A plugin that enables file uploads in CKEditor 5 using the CKFinder server–side connector.\n *\n * See the {@glink features/image-upload/ckfinder \"CKFinder file manager integration\" guide} to learn how to configure\n * and use this feature as well as find out more about the full integration with the file manager\n * provided by the {@link module:ckfinder/ckfinder~CKFinder} plugin.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload overview\"} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderUploadAdapter extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [FileRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'CKFinderUploadAdapter';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const url = this.editor.config.get('ckfinder.uploadUrl');\n if (!url) {\n return;\n }\n // Register CKFinderAdapter\n this.editor.plugins.get(FileRepository).createUploadAdapter = loader => new UploadAdapter(loader, url, this.editor.t);\n }\n}\n/**\n * Upload adapter for CKFinder.\n *\n * @private\n * @implements module:upload/filerepository~UploadAdapter\n */\nclass UploadAdapter {\n /**\n\t * Creates a new adapter instance.\n\t *\n\t * @param {module:upload/filerepository~FileLoader} loader\n\t * @param {String} url\n\t * @param {module:utils/locale~Locale#t} t\n\t */\n constructor(loader, url, t) {\n /**\n\t\t * FileLoader instance to use during the upload.\n\t\t *\n\t\t * @member {module:upload/filerepository~FileLoader} #loader\n\t\t */\n this.loader = loader;\n /**\n\t\t * Upload URL.\n\t\t *\n\t\t * @member {String} #url\n\t\t */\n this.url = url;\n /**\n\t\t * Locale translation method.\n\t\t *\n\t\t * @member {module:utils/locale~Locale#t} #t\n\t\t */\n this.t = t;\n }\n /**\n\t * Starts the upload process.\n\t *\n\t * @see module:upload/filerepository~UploadAdapter#upload\n\t * @returns {Promise.<Object>}\n\t */\n upload() {\n return this.loader.file.then(file => {\n return new Promise((resolve, reject) => {\n this._initRequest();\n this._initListeners(resolve, reject, file);\n this._sendRequest(file);\n });\n });\n }\n /**\n\t * Aborts the upload process.\n\t *\n\t * @see module:upload/filerepository~UploadAdapter#abort\n\t */\n abort() {\n if (this.xhr) {\n this.xhr.abort();\n }\n }\n /**\n\t * Initializes the XMLHttpRequest object.\n\t *\n\t * @private\n\t */\n _initRequest() {\n const xhr = this.xhr = new XMLHttpRequest();\n xhr.open('POST', this.url, true);\n xhr.responseType = 'json';\n }\n /**\n\t * Initializes XMLHttpRequest listeners.\n\t *\n\t * @private\n\t * @param {Function} resolve Callback function to be called when the request is successful.\n\t * @param {Function} reject Callback function to be called when the request cannot be completed.\n\t * @param {File} file File instance to be uploaded.\n\t */\n _initListeners(resolve, reject, file) {\n const xhr = this.xhr;\n const loader = this.loader;\n const t = this.t;\n const genericError = t('a') + ` ${ file.name }.`;\n xhr.addEventListener('error', () => reject(genericError));\n xhr.addEventListener('abort', () => reject());\n xhr.addEventListener('load', () => {\n const response = xhr.response;\n if (!response || !response.uploaded) {\n return reject(response && response.error && response.error.message ? response.error.message : genericError);\n }\n resolve({ default: response.url });\n });\n // Upload progress when it's supported.\n /* istanbul ignore else */\n if (xhr.upload) {\n xhr.upload.addEventListener('progress', evt => {\n if (evt.lengthComputable) {\n loader.uploadTotal = evt.total;\n loader.uploaded = evt.loaded;\n }\n });\n }\n }\n /**\n\t * Prepares the data and sends the request.\n\t *\n\t * @private\n\t * @param {File} file File instance to be uploaded.\n\t */\n _sendRequest(file) {\n // Prepare form data.\n const data = new FormData();\n data.append('upload', file);\n data.append('ckCsrfToken', getCsrfToken());\n // Send request.\n this.xhr.send(data);\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/blockautoformatediting\n */\n\nimport LiveRange from '@ckeditor/ckeditor5-engine/src/model/liverange';\n\n/**\n * The block autoformatting engine. It allows to format various block patterns. For example,\n * it can be configured to turn a paragraph starting with `*` and followed by a space into a list item.\n *\n * The autoformatting operation is integrated with the undo manager,\n * so the autoformatting step can be undone if the user's intention was not to format the text.\n *\n * See the constructors documentation to learn how to create custom inline autoformatters. You can also use\n * the {@link module:autoformat/autoformat~Autoformat} feature which enables a set of default autoformatters\n * (lists, headings, bold and italic).\n */\nexport default class BlockAutoformatEditing {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockAutoformatEditing';\n\t}\n\n\t/**\n\t * Creates a listener triggered on `change` event in the document.\n\t * Calls the callback when inserted text matches the regular expression or the command name\n\t * if provided instead of the callback.\n\t *\n\t * Examples of usage:\n\t *\n\t * To convert a paragraph to heading 1 when `- ` is typed, using just the command name:\n\t *\n\t *\t\tnew BlockAutoformatEditing( editor, /^\\- $/, 'heading1' );\n\t *\n\t * To convert a paragraph to heading 1 when `- ` is typed, using just the callback:\n\t *\n\t *\t\tnew BlockAutoformatEditing( editor, /^\\- $/, ( context ) => {\n\t *\t\t\tconst { match } = context;\n\t *\t\t\tconst headingLevel = match[ 1 ].length;\n\t *\n\t *\t\t\teditor.execute( 'heading', {\n\t *\t\t\t\tformatId: `heading${ headingLevel }`\n\t *\t\t\t} );\n\t * \t\t} );\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {RegExp} pattern The regular expression to execute on just inserted text.\n\t * @param {Function|String} callbackOrCommand The callback to execute or the command to run when the text is matched.\n\t * In case of providing the callback, it receives the following parameter:\n\t * * {Object} match RegExp.exec() result of matching the pattern to inserted text.\n\t */\n\tconstructor( editor, pattern, callbackOrCommand ) {\n\t\tlet callback;\n\t\tlet command = null;\n\n\t\tif ( typeof callbackOrCommand == 'function' ) {\n\t\t\tcallback = callbackOrCommand;\n\t\t} else {\n\t\t\t// We assume that the actual command name was provided.\n\t\t\tcommand = editor.commands.get( callbackOrCommand );\n\n\t\t\tcallback = () => {\n\t\t\t\teditor.execute( callbackOrCommand );\n\t\t\t};\n\t\t}\n\n\t\teditor.model.document.on( 'change', ( evt, batch ) => {\n\t\t\tif ( command && !command.isEnabled ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( batch.type == 'transparent' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst changes = Array.from( editor.model.document.differ.getChanges() );\n\t\t\tconst entry = changes[ 0 ];\n\n\t\t\t// Typing is represented by only a single change.\n\t\t\tif ( changes.length != 1 || entry.type !== 'insert' || entry.name != '$text' || entry.length != 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst blockToFormat = entry.position.parent;\n\n\t\t\t// Block formatting should trigger only if the entire content of a paragraph is a single text node... (see ckeditor5#5671).\n\t\t\tif ( !blockToFormat.is( 'paragraph' ) || blockToFormat.childCount !== 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst match = pattern.exec( blockToFormat.getChild( 0 ).data );\n\n\t\t\t// ...and this text node's data match the pattern.\n\t\t\tif ( !match ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Use enqueueChange to create new batch to separate typing batch from the auto-format changes.\n\t\t\teditor.model.enqueueChange( writer => {\n\t\t\t\t// Matched range.\n\t\t\t\tconst start = writer.createPositionAt( blockToFormat, 0 );\n\t\t\t\tconst end = writer.createPositionAt( blockToFormat, match[ 0 ].length );\n\t\t\t\tconst range = new LiveRange( start, end );\n\n\t\t\t\tconst wasChanged = callback( { match } );\n\n\t\t\t\t// Remove matched text.\n\t\t\t\tif ( wasChanged !== false ) {\n\t\t\t\t\twriter.remove( range );\n\t\t\t\t}\n\n\t\t\t\trange.detach();\n\t\t\t} );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/inlineautoformatediting\n */\n\nimport getLastTextLine from '@ckeditor/ckeditor5-typing/src/utils/getlasttextline';\n\n/**\n * The inline autoformatting engine. It allows to format various inline patterns. For example,\n * it can be configured to make \"foo\" bold when typed `**foo**` (the `**` markers will be removed).\n *\n * The autoformatting operation is integrated with the undo manager,\n * so the autoformatting step can be undone if the user's intention was not to format the text.\n *\n * See the constructors documentation to learn how to create custom inline autoformatters. You can also use\n * the {@link module:autoformat/autoformat~Autoformat} feature which enables a set of default autoformatters\n * (lists, headings, bold and italic).\n */\nexport default class InlineAutoformatEditing {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'InlineAutoformatEditing';\n\t}\n\n\t/**\n\t * Enables autoformatting mechanism for a given {@link module:core/editor/editor~Editor}.\n\t *\n\t * It formats the matched text by applying the given model attribute or by running the provided formatting callback.\n\t * On every change applied to the model the autoformatting engine checks the text on the left of the selection\n\t * and executes the provided action if the text matches given criteria (regular expression or callback).\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {Function|RegExp} testRegexpOrCallback The regular expression or callback to execute on text.\n\t * Provided regular expression *must* have three capture groups. The first and the third capture group\n\t * should match opening and closing delimiters. The second capture group should match the text to format.\n\t *\n\t *\t\t// Matches the `**bold text**` pattern.\n\t *\t\t// There are three capturing groups:\n\t *\t\t// - The first to match the starting `**` delimiter.\n\t *\t\t// - The second to match the text to format.\n\t *\t\t// - The third to match the ending `**` delimiter.\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, 'bold' );\n\t *\n\t * When a function is provided instead of the regular expression, it will be executed with the text to match as a parameter.\n\t * The function should return proper \"ranges\" to delete and format.\n\t *\n\t *\t\t{\n\t *\t\t\tremove: [\n\t *\t\t\t\t[ 0, 1 ],\t// Remove the first letter from the given text.\n\t *\t\t\t\t[ 5, 6 ]\t// Remove the 6th letter from the given text.\n\t *\t\t\t],\n\t *\t\t\tformat: [\n\t *\t\t\t\t[ 1, 5 ]\t// Format all letters from 2nd to 5th.\n\t *\t\t\t]\n\t *\t\t}\n\t *\n\t * @param {Function|String} attributeOrCallback The name of attribute to apply on matching text or a callback for manual\n\t * formatting. If callback is passed it should return `false` if changes should not be applied (e.g. if a command is disabled).\n\t *\n\t *\t\t// Use attribute name:\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, 'bold' );\n\t *\n\t *\t\t// Use formatting callback:\n\t *\t\tnew InlineAutoformatEditing( editor, /(\\*\\*)([^\\*]+?)(\\*\\*)$/g, ( writer, rangesToFormat ) => {\n\t *\t\t\tconst command = editor.commands.get( 'bold' );\n\t *\n\t *\t\t\tif ( !command.isEnabled ) {\n\t *\t\t\t\treturn false;\n\t *\t\t\t}\n\t *\n\t *\t\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, 'bold' );\n\t *\n\t *\t\t\tfor ( let range of validRanges ) {\n\t *\t\t\t\twriter.setAttribute( 'bold', true, range );\n\t *\t\t\t}\n\t *\t\t} );\n\t */\n\tconstructor( editor, testRegexpOrCallback, attributeOrCallback ) {\n\t\tlet regExp;\n\t\tlet attributeKey;\n\t\tlet testCallback;\n\t\tlet formatCallback;\n\n\t\tif ( testRegexpOrCallback instanceof RegExp ) {\n\t\t\tregExp = testRegexpOrCallback;\n\t\t} else {\n\t\t\ttestCallback = testRegexpOrCallback;\n\t\t}\n\n\t\tif ( typeof attributeOrCallback == 'string' ) {\n\t\t\tattributeKey = attributeOrCallback;\n\t\t} else {\n\t\t\tformatCallback = attributeOrCallback;\n\t\t}\n\n\t\t// A test callback run on changed text.\n\t\ttestCallback = testCallback || ( text => {\n\t\t\tlet result;\n\t\t\tconst remove = [];\n\t\t\tconst format = [];\n\n\t\t\twhile ( ( result = regExp.exec( text ) ) !== null ) {\n\t\t\t\t// There should be full match and 3 capture groups.\n\t\t\t\tif ( result && result.length < 4 ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tlet {\n\t\t\t\t\tindex,\n\t\t\t\t\t'1': leftDel,\n\t\t\t\t\t'2': content,\n\t\t\t\t\t'3': rightDel\n\t\t\t\t} = result;\n\n\t\t\t\t// Real matched string - there might be some non-capturing groups so we need to recalculate starting index.\n\t\t\t\tconst found = leftDel + content + rightDel;\n\t\t\t\tindex += result[ 0 ].length - found.length;\n\n\t\t\t\t// Start and End offsets of delimiters to remove.\n\t\t\t\tconst delStart = [\n\t\t\t\t\tindex,\n\t\t\t\t\tindex + leftDel.length\n\t\t\t\t];\n\t\t\t\tconst delEnd = [\n\t\t\t\t\tindex + leftDel.length + content.length,\n\t\t\t\t\tindex + leftDel.length + content.length + rightDel.length\n\t\t\t\t];\n\n\t\t\t\tremove.push( delStart );\n\t\t\t\tremove.push( delEnd );\n\n\t\t\t\tformat.push( [ index + leftDel.length, index + leftDel.length + content.length ] );\n\t\t\t}\n\n\t\t\treturn {\n\t\t\t\tremove,\n\t\t\t\tformat\n\t\t\t};\n\t\t} );\n\n\t\t// A format callback run on matched text.\n\t\tformatCallback = formatCallback || ( ( writer, rangesToFormat ) => {\n\t\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, attributeKey );\n\n\t\t\tfor ( const range of validRanges ) {\n\t\t\t\twriter.setAttribute( attributeKey, true, range );\n\t\t\t}\n\n\t\t\t// After applying attribute to the text, remove given attribute from the selection.\n\t\t\t// This way user is able to type a text without attribute used by auto formatter.\n\t\t\twriter.removeSelectionAttribute( attributeKey );\n\t\t} );\n\n\t\teditor.model.document.on( 'change', ( evt, batch ) => {\n\t\t\tif ( batch.type == 'transparent' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst model = editor.model;\n\t\t\tconst selection = model.document.selection;\n\n\t\t\t// Do nothing if selection is not collapsed.\n\t\t\tif ( !selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst changes = Array.from( model.document.differ.getChanges() );\n\t\t\tconst entry = changes[ 0 ];\n\n\t\t\t// Typing is represented by only a single change.\n\t\t\tif ( changes.length != 1 || entry.type !== 'insert' || entry.name != '$text' || entry.length != 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst focus = selection.focus;\n\t\t\tconst block = focus.parent;\n\t\t\tconst { text, range } = getLastTextLine( model.createRange( model.createPositionAt( block, 0 ), focus ), model );\n\t\t\tconst testOutput = testCallback( text );\n\t\t\tconst rangesToFormat = testOutputToRanges( range.start, testOutput.format, model );\n\t\t\tconst rangesToRemove = testOutputToRanges( range.start, testOutput.remove, model );\n\n\t\t\tif ( !( rangesToFormat.length && rangesToRemove.length ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Use enqueueChange to create new batch to separate typing batch from the auto-format changes.\n\t\t\tmodel.enqueueChange( writer => {\n\t\t\t\t// Apply format.\n\t\t\t\tconst hasChanged = formatCallback( writer, rangesToFormat );\n\n\t\t\t\t// Strict check on `false` to have backward compatibility (when callbacks were returning `undefined`).\n\t\t\t\tif ( hasChanged === false ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\t// Remove delimiters - use reversed order to not mix the offsets while removing.\n\t\t\t\tfor ( const range of rangesToRemove.reverse() ) {\n\t\t\t\t\twriter.remove( range );\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n}\n\n// Converts output of the test function provided to the InlineAutoformatEditing and converts it to the model ranges\n// inside provided block.\n//\n// @private\n// @param {module:engine/model/position~Position} start\n// @param {Array.<Array>} arrays\n// @param {module:engine/model/model~Model} model\nfunction testOutputToRanges( start, arrays, model ) {\n\treturn arrays\n\t\t.filter( array => ( array[ 0 ] !== undefined && array[ 1 ] !== undefined ) )\n\t\t.map( array => {\n\t\t\treturn model.createRange( start.getShiftedBy( array[ 0 ] ), start.getShiftedBy( array[ 1 ] ) );\n\t\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module typing/utils/getlasttextline\n */\n\n/**\n * Returns the last text line from the given range.\n *\n * \"The last text line\" is understood as text (from one or more text nodes) which is limited either by a parent block\n * or by inline elements (e.g. `<softBreak>`).\n *\n *\t\tconst rangeToCheck = model.createRange(\n *\t\t\tmodel.createPositionAt( paragraph, 0 ),\n *\t\t\tmodel.createPositionAt( paragraph, 'end' )\n *\t\t);\n *\n *\t\tconst { text, range } = getLastTextLine( rangeToCheck, model );\n *\n * For model below, the returned `text` will be \"Foo bar baz\" and `range` will be set on whole `<paragraph>` content:\n *\n *\t\t<paragraph>Foo bar baz<paragraph>\n *\n * However, in below case, `text` will be set to \"baz\" and `range` will be set only on \"baz\".\n *\n *\t\t<paragraph>Foo<softBreak></softBreak>bar<softBreak></softBreak>baz<paragraph>\n *\n * @protected\n * @param {module:engine/model/range~Range} range\n * @param {module:engine/model/model~Model} model\n * @returns {module:typing/utils/getlasttextline~LastTextLineData}\n */\nexport default function getLastTextLine( range, model ) {\n\tlet start = range.start;\n\n\tconst text = Array.from( range.getItems() ).reduce( ( rangeText, node ) => {\n\t\t// Trim text to a last occurrence of an inline element and update range start.\n\t\tif ( !( node.is( 'text' ) || node.is( 'textProxy' ) ) ) {\n\t\t\tstart = model.createPositionAfter( node );\n\n\t\t\treturn '';\n\t\t}\n\n\t\treturn rangeText + node.data;\n\t}, '' );\n\n\treturn { text, range: model.createRange( start, range.end ) };\n}\n\n/**\n * The value returned by {@link module:typing/utils/getlasttextline~getLastTextLine}.\n *\n * @typedef {Object} module:typing/utils/getlasttextline~LastTextLineData\n *\n * @property {String} text The text from the text nodes in the last text line.\n * @property {module:engine/model/range~Range} range The range set on the text nodes in the last text line.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module autoformat/autoformat\n */\n\nimport BlockAutoformatEditing from './blockautoformatediting';\nimport InlineAutoformatEditing from './inlineautoformatediting';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * Enables a set of predefined autoformatting actions.\n *\n * For a detailed overview, check the {@glink features/autoformat Autoformatting feature documentation}\n * and the {@glink api/autoformat package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Autoformat extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Autoformat';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tthis._addListAutoformats();\n\t\tthis._addBasicStylesAutoformats();\n\t\tthis._addHeadingAutoformats();\n\t\tthis._addBlockQuoteAutoformats();\n\t\tthis._addCodeBlockAutoformats();\n\t}\n\n\t/**\n\t * Adds autoformatting related to the {@link module:list/list~List}.\n\t *\n\t * When typed:\n\t * - `* ` or `- ` – A paragraph will be changed to a bulleted list.\n\t * - `1. ` or `1) ` – A paragraph will be changed to a numbered list (\"1\" can be any digit or a list of digits).\n\t *\n\t * @private\n\t */\n\t_addListAutoformats() {\n\t\tconst commands = this.editor.commands;\n\n\t\tif ( commands.get( 'bulletedList' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^[*-]\\s$/, 'bulletedList' );\n\t\t}\n\n\t\tif ( commands.get( 'numberedList' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^1[.|)]\\s$/, 'numberedList' );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to the {@link module:basic-styles/bold~Bold},\n\t * {@link module:basic-styles/italic~Italic} and {@link module:basic-styles/code~Code}.\n\t *\n\t * When typed:\n\t * - `**foobar**` – `**` characters are removed and `foobar` is set to bold,\n\t * - `__foobar__` – `__` characters are removed and `foobar` is set to bold,\n\t * - `*foobar*` – `*` characters are removed and `foobar` is set to italic,\n\t * - `_foobar_` – `_` characters are removed and `foobar` is set to italic,\n\t * - ``` `foobar` – ``` ` ``` characters are removed and `foobar` is set to code.\n\t *\n\t * @private\n\t */\n\t_addBasicStylesAutoformats() {\n\t\tconst commands = this.editor.commands;\n\n\t\tif ( commands.get( 'bold' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst boldCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'bold' );\n\n\t\t\tnew InlineAutoformatEditing( this.editor, /(\\*\\*)([^*]+)(\\*\\*)$/g, boldCallback );\n\t\t\tnew InlineAutoformatEditing( this.editor, /(__)([^_]+)(__)$/g, boldCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\n\t\tif ( commands.get( 'italic' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst italicCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'italic' );\n\n\t\t\t// The italic autoformatter cannot be triggered by the bold markers, so we need to check the\n\t\t\t// text before the pattern (e.g. `(?:^|[^\\*])`).\n\t\t\tnew InlineAutoformatEditing( this.editor, /(?:^|[^*])(\\*)([^*_]+)(\\*)$/g, italicCallback );\n\t\t\tnew InlineAutoformatEditing( this.editor, /(?:^|[^_])(_)([^_]+)(_)$/g, italicCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\n\t\tif ( commands.get( 'code' ) ) {\n\t\t\t/* eslint-disable no-new */\n\t\t\tconst codeCallback = getCallbackFunctionForInlineAutoformat( this.editor, 'code' );\n\n\t\t\tnew InlineAutoformatEditing( this.editor, /(`)([^`]+)(`)$/g, codeCallback );\n\t\t\t/* eslint-enable no-new */\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:heading/heading~Heading}.\n\t *\n\t * It is using a number at the end of the command name to associate it with the proper trigger:\n\t *\n\t * * `heading` with value `heading1` will be executed when typing `#`,\n\t * * `heading` with value `heading2` will be executed when typing `##`,\n\t * * ... up to `heading6` and `######`.\n\t *\n\t * @private\n\t */\n\t_addHeadingAutoformats() {\n\t\tconst command = this.editor.commands.get( 'heading' );\n\n\t\tif ( command ) {\n\t\t\tcommand.modelElements\n\t\t\t\t.filter( name => name.match( /^heading[1-6]$/ ) )\n\t\t\t\t.forEach( commandValue => {\n\t\t\t\t\tconst level = commandValue[ 7 ];\n\t\t\t\t\tconst pattern = new RegExp( `^(#{${ level }})\\\\s$` );\n\n\t\t\t\t\t// eslint-disable-next-line no-new\n\t\t\t\t\tnew BlockAutoformatEditing( this.editor, pattern, () => {\n\t\t\t\t\t\tif ( !command.isEnabled ) {\n\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tthis.editor.execute( 'heading', { value: commandValue } );\n\t\t\t\t\t} );\n\t\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:block-quote/blockquote~BlockQuote}.\n\t *\n\t * When typed:\n\t * * `> ` – A paragraph will be changed to a block quote.\n\t *\n\t * @private\n\t */\n\t_addBlockQuoteAutoformats() {\n\t\tif ( this.editor.commands.get( 'blockQuote' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^>\\s$/, 'blockQuote' );\n\t\t}\n\t}\n\n\t/**\n\t * Adds autoformatting related to {@link module:code-block/codeblock~CodeBlock}.\n\t *\n\t * When typed:\n\t * - `` ``` `` – A paragraph will be changed to a code block.\n\t *\n\t * @private\n\t */\n\t_addCodeBlockAutoformats() {\n\t\tif ( this.editor.commands.get( 'codeBlock' ) ) {\n\t\t\t// eslint-disable-next-line no-new\n\t\t\tnew BlockAutoformatEditing( this.editor, /^```$/, 'codeBlock' );\n\t\t}\n\t}\n}\n\n// Helper function for getting `InlineAutoformatEditing` callbacks that checks if command is enabled.\n//\n// @param {module:core/editor/editor~Editor} editor\n// @param {String} attributeKey\n// @returns {Function}\nfunction getCallbackFunctionForInlineAutoformat( editor, attributeKey ) {\n\treturn ( writer, rangesToFormat ) => {\n\t\tconst command = editor.commands.get( attributeKey );\n\n\t\tif ( !command.isEnabled ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst validRanges = editor.model.schema.getValidRanges( rangesToFormat, attributeKey );\n\n\t\tfor ( const range of validRanges ) {\n\t\t\twriter.setAttribute( attributeKey, true, range );\n\t\t}\n\n\t\t// After applying attribute to the text, remove given attribute from the selection.\n\t\t// This way user is able to type a text without attribute used by auto formatter.\n\t\twriter.removeSelectionAttribute( attributeKey );\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/attributecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\n/**\n * An extension of the base {@link module:core/command~Command} class, which provides utilities for a command\n * that toggles a single attribute on a text or an element.\n *\n * `AttributeCommand` uses {@link module:engine/model/document~Document#selection}\n * to decide which nodes (if any) should be changed, and applies or removes the attribute from them.\n *\n * The command checks the {@link module:engine/model/model~Model#schema} to decide if it can be enabled\n * for the current selection and to which nodes the attribute can be applied.\n *\n * @extends module:core/command~Command\n */\nexport default class AttributeCommand extends Command {\n\t/**\n\t * @param {module:core/editor/editor~Editor} editor\n\t * @param {String} attributeKey Attribute that will be set by the command.\n\t */\n\tconstructor( editor, attributeKey ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The attribute that will be set by the command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.attributeKey = attributeKey;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection#hasAttribute selection has the attribute} which means that:\n\t\t *\n\t\t * * If the selection is not empty – That the attribute is set on the first node in the selection that allows this attribute.\n\t\t * * If the selection is empty – That the selection has the attribute itself (which means that newly typed\n\t\t * text will have this attribute, too).\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t}\n\n\t/**\n\t * Updates the command's {@link #value} and {@link #isEnabled} based on the current selection.\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.value = this._getValueFromFirstAllowedNode();\n\t\tthis.isEnabled = model.schema.checkAttributeInSelection( doc.selection, this.attributeKey );\n\t}\n\n\t/**\n\t * Executes the command — applies the attribute to the selection or removes it from the selection.\n\t *\n\t * If the command is active (`value == true`), it will remove attributes. Otherwise, it will set attributes.\n\t *\n\t * The execution result differs, depending on the {@link module:engine/model/document~Document#selection}:\n\t *\n\t * * If the selection is on a range, the command applies the attribute to all nodes in that range\n\t * (if they are allowed to have this attribute by the {@link module:engine/model/schema~Schema schema}).\n\t * * If the selection is collapsed in a non-empty node, the command applies the attribute to the\n\t * {@link module:engine/model/document~Document#selection} itself (note that typed characters copy attributes from the selection).\n\t * * If the selection is collapsed in an empty node, the command applies the attribute to the parent node of the selection (note\n\t * that the selection inherits all attributes from a node if it is in an empty node).\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Command options.\n\t * @param {Boolean} [options.forceValue] If set, it will force the command behavior. If `true`, the command will apply the attribute,\n\t * otherwise the command will remove the attribute.\n\t * If not set, the command will look for its current value to decide what it should do.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst value = ( options.forceValue === undefined ) ? !this.value : options.forceValue;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tif ( value ) {\n\t\t\t\t\twriter.setSelectionAttribute( this.attributeKey, true );\n\t\t\t\t} else {\n\t\t\t\t\twriter.removeSelectionAttribute( this.attributeKey );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst ranges = model.schema.getValidRanges( selection.getRanges(), this.attributeKey );\n\n\t\t\t\tfor ( const range of ranges ) {\n\t\t\t\t\tif ( value ) {\n\t\t\t\t\t\twriter.setAttribute( this.attributeKey, value, range );\n\t\t\t\t\t} else {\n\t\t\t\t\t\twriter.removeAttribute( this.attributeKey, range );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the attribute value of the first node in the selection that allows the attribute.\n\t * For the collapsed selection returns the selection attribute.\n\t *\n\t * @private\n\t * @returns {Boolean} The attribute value.\n\t */\n\t_getValueFromFirstAllowedNode() {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst selection = model.document.selection;\n\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn selection.hasAttribute( this.attributeKey );\n\t\t}\n\n\t\tfor ( const range of selection.getRanges() ) {\n\t\t\tfor ( const item of range.getItems() ) {\n\t\t\t\tif ( schema.checkAttribute( item, this.attributeKey ) ) {\n\t\t\t\t\treturn item.hasAttribute( this.attributeKey );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/bold/boldediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport AttributeCommand from '../attributecommand';\n\nconst BOLD = 'bold';\n\n/**\n * The bold editing feature.\n *\n * It registers the `'bold'` command and introduces the `bold` attribute in the model which renders to the view\n * as a `<strong>` element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BoldEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BoldEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\t// Allow bold attribute on text nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: BOLD } );\n\t\teditor.model.schema.setAttributeProperties( BOLD, {\n\t\t\tisFormatting: true,\n\t\t\tcopyOnEnter: true\n\t\t} );\n\n\t\t// Build converter from model to view for data and editing pipelines.\n\t\teditor.conversion.attributeToElement( {\n\t\t\tmodel: BOLD,\n\t\t\tview: 'strong',\n\t\t\tupcastAlso: [\n\t\t\t\t'b',\n\t\t\t\tviewElement => {\n\t\t\t\t\tconst fontWeight = viewElement.getStyle( 'font-weight' );\n\n\t\t\t\t\tif ( !fontWeight ) {\n\t\t\t\t\t\treturn null;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Value of the `font-weight` attribute can be defined as a string or a number.\n\t\t\t\t\tif ( fontWeight == 'bold' || Number( fontWeight ) >= 600 ) {\n\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\tname: true,\n\t\t\t\t\t\t\tstyles: [ 'font-weight' ]\n\t\t\t\t\t\t};\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\t// Create bold command.\n\t\teditor.commands.add( BOLD, new AttributeCommand( editor, BOLD ) );\n\n\t\t// Set the Ctrl+B keystroke.\n\t\teditor.keystrokes.set( 'CTRL+B', BOLD );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module basic-styles/bold/boldui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport boldIcon from '../../theme/icons/bold.svg';\nconst BOLD = 'bold';\n/**\n * The bold UI feature. It introduces the Bold button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BoldUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Add bold button to feature components.\n editor.ui.componentFactory.add(BOLD, locale => {\n const command = editor.commands.get(BOLD);\n const view = new ButtonView(locale);\n view.set({\n label: t('ag'),\n icon: boldIcon,\n keystroke: 'CTRL+B',\n tooltip: true,\n isToggleable: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(view, 'execute', () => editor.execute(BOLD));\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M10.187 17H5.773c-.637 0-1.092-.138-1.364-.415-.273-.277-.409-.718-.409-1.323V4.738c0-.617.14-1.062.419-1.332.279-.27.73-.406 1.354-.406h4.68c.69 0 1.288.041 1.793.124.506.083.96.242 1.36.478.341.197.644.447.906.75a3.262 3.262 0 0 1 .808 2.162c0 1.401-.722 2.426-2.167 3.075C15.05 10.175 16 11.315 16 13.01a3.756 3.756 0 0 1-2.296 3.504 6.1 6.1 0 0 1-1.517.377c-.571.073-1.238.11-2 .11zm-.217-6.217H7v4.087h3.069c1.977 0 2.965-.69 2.965-2.072 0-.707-.256-1.22-.768-1.537-.512-.319-1.277-.478-2.296-.478zM7 5.13v3.619h2.606c.729 0 1.292-.067 1.69-.2a1.6 1.6 0 0 0 .91-.765c.165-.267.247-.566.247-.897 0-.707-.26-1.176-.778-1.409-.519-.232-1.31-.348-2.375-.348H7z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/italic/italicediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport AttributeCommand from '../attributecommand';\n\nconst ITALIC = 'italic';\n\n/**\n * The italic editing feature.\n *\n * It registers the `'italic'` command, the <kbd>Ctrl+I</kbd> keystroke and introduces the `italic` attribute in the model\n * which renders to the view as an `<i>` element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ItalicEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ItalicEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Allow italic attribute on text nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: ITALIC } );\n\t\teditor.model.schema.setAttributeProperties( ITALIC, {\n\t\t\tisFormatting: true,\n\t\t\tcopyOnEnter: true\n\t\t} );\n\n\t\teditor.conversion.attributeToElement( {\n\t\t\tmodel: ITALIC,\n\t\t\tview: 'i',\n\t\t\tupcastAlso: [\n\t\t\t\t'em',\n\t\t\t\t{\n\t\t\t\t\tstyles: {\n\t\t\t\t\t\t'font-style': 'italic'\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\t// Create italic command.\n\t\teditor.commands.add( ITALIC, new AttributeCommand( editor, ITALIC ) );\n\n\t\t// Set the Ctrl+I keystroke.\n\t\teditor.keystrokes.set( 'CTRL+I', ITALIC );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module basic-styles/italic/italicui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport italicIcon from '../../theme/icons/italic.svg';\nconst ITALIC = 'italic';\n/**\n * The italic UI feature. It introduces the Italic button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ItalicUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Add bold button to feature components.\n editor.ui.componentFactory.add(ITALIC, locale => {\n const command = editor.commands.get(ITALIC);\n const view = new ButtonView(locale);\n view.set({\n label: t('d'),\n icon: italicIcon,\n keystroke: 'CTRL+I',\n tooltip: true,\n isToggleable: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(view, 'execute', () => editor.execute(ITALIC));\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M9.586 14.633l.021.004c-.036.335.095.655.393.962.082.083.173.15.274.201h1.474a.6.6 0 1 1 0 1.2H5.304a.6.6 0 0 1 0-1.2h1.15c.474-.07.809-.182 1.005-.334.157-.122.291-.32.404-.597l2.416-9.55a1.053 1.053 0 0 0-.281-.823 1.12 1.12 0 0 0-.442-.296H8.15a.6.6 0 0 1 0-1.2h6.443a.6.6 0 1 1 0 1.2h-1.195c-.376.056-.65.155-.823.296-.215.175-.423.439-.623.79l-2.366 9.347z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/first\n */\n\n/**\n * Returns first item of the given `iterable`.\n *\n * @param {Iterable.<*>} iterable\n * @returns {*}\n */\nexport default function first( iterable ) {\n\tconst iteratorItem = iterable.next();\n\n\tif ( iteratorItem.done ) {\n\t\treturn null;\n\t}\n\n\treturn iteratorItem.value;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquotecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The block quote command plugin.\n *\n * @extends module:core/command~Command\n */\nexport default class BlockQuoteCommand extends Command {\n\t/**\n\t * Whether the selection starts in a block quote.\n\t *\n\t * @observable\n\t * @readonly\n\t * @member {Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.value = this._getValue();\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Executes the command. When the command {@link #value is on}, all top-most block quotes within\n\t * the selection will be removed. If it is off, all selected blocks will be wrapped with\n\t * a block quote.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Command options.\n\t * @param {Boolean} [options.forceValue] If set, it will force the command behavior. If `true`, the command will apply a block quote,\n\t * otherwise the command will remove the block quote. If not set, the command will act basing on its current value.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst selection = model.document.selection;\n\n\t\tconst blocks = Array.from( selection.getSelectedBlocks() );\n\n\t\tconst value = ( options.forceValue === undefined ) ? !this.value : options.forceValue;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( !value ) {\n\t\t\t\tthis._removeQuote( writer, blocks.filter( findQuote ) );\n\t\t\t} else {\n\t\t\t\tconst blocksToQuote = blocks.filter( block => {\n\t\t\t\t\t// Already quoted blocks needs to be considered while quoting too\n\t\t\t\t\t// in order to reuse their <bQ> elements.\n\t\t\t\t\treturn findQuote( block ) || checkCanBeQuoted( schema, block );\n\t\t\t\t} );\n\n\t\t\t\tthis._applyQuote( writer, blocksToQuote );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the command's {@link #value}.\n\t *\n\t * @private\n\t * @returns {Boolean} The current value.\n\t */\n\t_getValue() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\t// In the current implementation, the block quote must be an immediate parent of a block element.\n\t\treturn !!( firstBlock && findQuote( firstBlock ) );\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\tif ( this.value ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tconst selection = this.editor.model.document.selection;\n\t\tconst schema = this.editor.model.schema;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\tif ( !firstBlock ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn checkCanBeQuoted( schema, firstBlock );\n\t}\n\n\t/**\n\t * Removes the quote from given blocks.\n\t *\n\t * If blocks which are supposed to be \"unquoted\" are in the middle of a quote,\n\t * start it or end it, then the quote will be split (if needed) and the blocks\n\t * will be moved out of it, so other quoted blocks remained quoted.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer\n\t * @param {Array.<module:engine/model/element~Element>} blocks\n\t */\n\t_removeQuote( writer, blocks ) {\n\t\t// Unquote all groups of block. Iterate in the reverse order to not break following ranges.\n\t\tgetRangesOfBlockGroups( writer, blocks ).reverse().forEach( groupRange => {\n\t\t\tif ( groupRange.start.isAtStart && groupRange.end.isAtEnd ) {\n\t\t\t\twriter.unwrap( groupRange.start.parent );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The group of blocks are at the beginning of an <bQ> so let's move them left (out of the <bQ>).\n\t\t\tif ( groupRange.start.isAtStart ) {\n\t\t\t\tconst positionBefore = writer.createPositionBefore( groupRange.start.parent );\n\n\t\t\t\twriter.move( groupRange, positionBefore );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// The blocks are in the middle of an <bQ> so we need to split the <bQ> after the last block\n\t\t\t// so we move the items there.\n\t\t\tif ( !groupRange.end.isAtEnd ) {\n\t\t\t\twriter.split( groupRange.end );\n\t\t\t}\n\n\t\t\t// Now we are sure that groupRange.end.isAtEnd is true, so let's move the blocks right.\n\n\t\t\tconst positionAfter = writer.createPositionAfter( groupRange.end.parent );\n\n\t\t\twriter.move( groupRange, positionAfter );\n\t\t} );\n\t}\n\n\t/**\n\t * Applies the quote to given blocks.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer\n\t * @param {Array.<module:engine/model/element~Element>} blocks\n\t */\n\t_applyQuote( writer, blocks ) {\n\t\tconst quotesToMerge = [];\n\n\t\t// Quote all groups of block. Iterate in the reverse order to not break following ranges.\n\t\tgetRangesOfBlockGroups( writer, blocks ).reverse().forEach( groupRange => {\n\t\t\tlet quote = findQuote( groupRange.start );\n\n\t\t\tif ( !quote ) {\n\t\t\t\tquote = writer.createElement( 'blockQuote' );\n\n\t\t\t\twriter.wrap( groupRange, quote );\n\t\t\t}\n\n\t\t\tquotesToMerge.push( quote );\n\t\t} );\n\n\t\t// Merge subsequent <bQ> elements. Reverse the order again because this time we want to go through\n\t\t// the <bQ> elements in the source order (due to how merge works – it moves the right element's content\n\t\t// to the first element and removes the right one. Since we may need to merge a couple of subsequent `<bQ>` elements\n\t\t// we want to keep the reference to the first (furthest left) one.\n\t\tquotesToMerge.reverse().reduce( ( currentQuote, nextQuote ) => {\n\t\t\tif ( currentQuote.nextSibling == nextQuote ) {\n\t\t\t\twriter.merge( writer.createPositionAfter( currentQuote ) );\n\n\t\t\t\treturn currentQuote;\n\t\t\t}\n\n\t\t\treturn nextQuote;\n\t\t} );\n\t}\n}\n\nfunction findQuote( elementOrPosition ) {\n\treturn elementOrPosition.parent.name == 'blockQuote' ? elementOrPosition.parent : null;\n}\n\n// Returns a minimal array of ranges containing groups of subsequent blocks.\n//\n// content: abcdefgh\n// blocks: [ a, b, d, f, g, h ]\n// output ranges: [ab]c[d]e[fgh]\n//\n// @param {Array.<module:engine/model/element~Element>} blocks\n// @returns {Array.<module:engine/model/range~Range>}\nfunction getRangesOfBlockGroups( writer, blocks ) {\n\tlet startPosition;\n\tlet i = 0;\n\tconst ranges = [];\n\n\twhile ( i < blocks.length ) {\n\t\tconst block = blocks[ i ];\n\t\tconst nextBlock = blocks[ i + 1 ];\n\n\t\tif ( !startPosition ) {\n\t\t\tstartPosition = writer.createPositionBefore( block );\n\t\t}\n\n\t\tif ( !nextBlock || block.nextSibling != nextBlock ) {\n\t\t\tranges.push( writer.createRange( startPosition, writer.createPositionAfter( block ) ) );\n\t\t\tstartPosition = null;\n\t\t}\n\n\t\ti++;\n\t}\n\n\treturn ranges;\n}\n\n// Checks whether <bQ> can wrap the block.\nfunction checkCanBeQuoted( schema, block ) {\n\t// TMP will be replaced with schema.checkWrap().\n\tconst isBQAllowed = schema.checkChild( block.parent, 'blockQuote' );\n\tconst isBlockAllowedInBQ = schema.checkChild( [ '$root', 'blockQuote' ], block );\n\n\treturn isBQAllowed && isBlockAllowedInBQ;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquoteediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport BlockQuoteCommand from './blockquotecommand';\n\n/**\n * The block quote editing.\n *\n * Introduces the `'blockQuote'` command and the `'blockQuote'` model element.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuoteEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockQuoteEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\n\t\teditor.commands.add( 'blockQuote', new BlockQuoteCommand( editor ) );\n\n\t\tschema.register( 'blockQuote', {\n\t\t\tallowWhere: '$block',\n\t\t\tallowContentOf: '$root'\n\t\t} );\n\n\t\t// Disallow blockQuote in blockQuote.\n\t\tschema.addChildCheck( ( ctx, childDef ) => {\n\t\t\tif ( ctx.endsWith( 'blockQuote' ) && childDef.name == 'blockQuote' ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t} );\n\n\t\teditor.conversion.elementToElement( { model: 'blockQuote', view: 'blockquote' } );\n\n\t\t// Postfixer which cleans incorrect model states connected with block quotes.\n\t\teditor.model.document.registerPostFixer( writer => {\n\t\t\tconst changes = editor.model.document.differ.getChanges();\n\n\t\t\tfor ( const entry of changes ) {\n\t\t\t\tif ( entry.type == 'insert' ) {\n\t\t\t\t\tconst element = entry.position.nodeAfter;\n\n\t\t\t\t\tif ( !element ) {\n\t\t\t\t\t\t// We are inside a text node.\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( element.is( 'blockQuote' ) && element.isEmpty ) {\n\t\t\t\t\t\t// Added an empty blockQuote - remove it.\n\t\t\t\t\t\twriter.remove( element );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t} else if ( element.is( 'blockQuote' ) && !schema.checkChild( entry.position, element ) ) {\n\t\t\t\t\t\t// Added a blockQuote in incorrect place - most likely inside another blockQuote. Unwrap it\n\t\t\t\t\t\t// so the content inside is not lost.\n\t\t\t\t\t\twriter.unwrap( element );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t} else if ( element.is( 'element' ) ) {\n\t\t\t\t\t\t// Just added an element. Check its children to see if there are no nested blockQuotes somewhere inside.\n\t\t\t\t\t\tconst range = writer.createRangeIn( element );\n\n\t\t\t\t\t\tfor ( const child of range.getItems() ) {\n\t\t\t\t\t\t\tif ( child.is( 'blockQuote' ) && !schema.checkChild( writer.createPositionBefore( child ), child ) ) {\n\t\t\t\t\t\t\t\twriter.unwrap( child );\n\n\t\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} else if ( entry.type == 'remove' ) {\n\t\t\t\t\tconst parent = entry.position.parent;\n\n\t\t\t\t\tif ( parent.is( 'blockQuote' ) && parent.isEmpty ) {\n\t\t\t\t\t\t// Something got removed and now blockQuote is empty. Remove the blockQuote as well.\n\t\t\t\t\t\twriter.remove( parent );\n\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn false;\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tconst editor = this.editor;\n\t\tconst command = editor.commands.get( 'blockQuote' );\n\n\t\t// Overwrite default Enter key behavior.\n\t\t// If Enter key is pressed with selection collapsed in empty block inside a quote, break the quote.\n\t\t// This listener is added in afterInit in order to register it after list's feature listener.\n\t\t// We can't use a priority for this, because 'low' is already used by the enter feature, unless\n\t\t// we'd use numeric priority in this case.\n\t\tthis.listenTo( this.editor.editing.view.document, 'enter', ( evt, data ) => {\n\t\t\tconst doc = this.editor.model.document;\n\t\t\tconst positionParent = doc.selection.getLastPosition().parent;\n\n\t\t\tif ( doc.selection.isCollapsed && positionParent.isEmpty && command.value ) {\n\t\t\t\tthis.editor.execute( 'blockQuote' );\n\t\t\t\tthis.editor.editing.view.scrollToTheSelection();\n\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module block-quote/blockquoteui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport quoteIcon from '@ckeditor/ckeditor5-core/theme/icons/quote.svg';\nimport '../theme/blockquote.css';\n/**\n * The block quote UI plugin.\n *\n * It introduces the `'blockQuote'` button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuoteUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n editor.ui.componentFactory.add('blockQuote', locale => {\n const command = editor.commands.get('blockQuote');\n const buttonView = new ButtonView(locale);\n buttonView.set({\n label: t('h'),\n icon: quoteIcon,\n tooltip: true,\n isToggleable: true\n });\n // Bind button model to command.\n buttonView.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n // Execute command.\n this.listenTo(buttonView, 'execute', () => editor.execute('blockQuote'));\n return buttonView;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M3 10.423a6.5 6.5 0 0 1 6.056-6.408l.038.67C6.448 5.423 5.354 7.663 5.22 10H9c.552 0 .5.432.5.986v4.511c0 .554-.448.503-1 .503h-5c-.552 0-.5-.449-.5-1.003v-4.574zm8 0a6.5 6.5 0 0 1 6.056-6.408l.038.67c-2.646.739-3.74 2.979-3.873 5.315H17c.552 0 .5.432.5.986v4.511c0 .554-.448.503-1 .503h-5c-.552 0-.5-.449-.5-1.003v-4.574z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ckfinder/ckfinderui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport browseFilesIcon from '../theme/icons/browse-files.svg';\n/**\n * The CKFinder UI plugin. It introduces the `'ckfinder'` toolbar button.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'CKFinderUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const componentFactory = editor.ui.componentFactory;\n const t = editor.t;\n componentFactory.add('ckfinder', locale => {\n const command = editor.commands.get('ckfinder');\n const button = new ButtonView(locale);\n button.set({\n label: t('g'),\n icon: browseFilesIcon,\n tooltip: true\n });\n button.bind('isEnabled').to(command);\n button.on('execute', () => {\n editor.execute('ckfinder');\n editor.editing.view.focus();\n });\n return button;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.627 16.5zm5.873-.196zm0-7.001V8h-13v8.5h4.341c.191.54.457 1.044.785 1.5H2a1.5 1.5 0 0 1-1.5-1.5v-13A1.5 1.5 0 0 1 2 2h4.5a1.5 1.5 0 0 1 1.06.44L9.122 4H16a1.5 1.5 0 0 1 1.5 1.5v1A1.5 1.5 0 0 1 19 8v2.531a6.027 6.027 0 0 0-1.5-1.228zM16 6.5v-1H8.5l-2-2H2v13h1V8a1.5 1.5 0 0 1 1.5-1.5H16z\\\"/><path d=\\\"M14.5 19.5a5 5 0 1 1 0-10 5 5 0 0 1 0 10zM15 14v-2h-1v2h-2v1h2v2h1v-2h2v-1h-2z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/imageloadobserver\n */\n\nimport Observer from '@ckeditor/ckeditor5-engine/src/view/observer/observer';\n\n/**\n * Observes all new images added to the {@link module:engine/view/document~Document},\n * fires {@link module:engine/view/document~Document#event:imageLoaded} and\n * {@link module:engine/view/document~Document#event:layoutChanged} event every time when the new image\n * has been loaded.\n *\n * **Note:** This event is not fired for images that has been added to the document and rendered as `complete` (already loaded).\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class ImageLoadObserver extends Observer {\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domRoot ) {\n\t\tthis.listenTo( domRoot, 'load', ( event, domEvent ) => {\n\t\t\tconst domElement = domEvent.target;\n\n\t\t\tif ( domElement.tagName == 'IMG' ) {\n\t\t\t\tthis._fireEvents( domEvent );\n\t\t\t}\n\t\t\t// Use capture phase for better performance (#4504).\n\t\t}, { useCapture: true } );\n\t}\n\n\t/**\n\t * Fires {@link module:engine/view/document~Document#event:layoutChanged} and\n\t * {@link module:engine/view/document~Document#event:imageLoaded}\n\t * if observer {@link #isEnabled is enabled}.\n\t *\n\t * @protected\n\t * @param {Event} domEvent The DOM event.\n\t */\n\t_fireEvents( domEvent ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( 'layoutChanged' );\n\t\t\tthis.document.fire( 'imageLoaded', domEvent );\n\t\t}\n\t}\n}\n\n/**\n * Fired when an <img/> DOM element has been loaded in the DOM root.\n *\n * Introduced by {@link module:image/image/imageloadobserver~ImageLoadObserver}.\n *\n * @see module:image/image/imageloadobserver~ImageLoadObserver\n * @event module:engine/view/document~Document#event:imageLoaded\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/converters\n */\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * Returns a function that converts the image view representation:\n *\n *\t\t<figure class=\"image\"><img src=\"...\" alt=\"...\"></img></figure>\n *\n * to the model representation:\n *\n *\t\t<image src=\"...\" alt=\"...\"></image>\n *\n * The entire content of the `<figure>` element except the first `<img>` is being converted as children\n * of the `<image>` model element.\n *\n * @returns {Function}\n */\nexport function viewFigureToModel() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element:figure', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\t// Do not convert if this is not an \"image figure\".\n\t\tif ( !conversionApi.consumable.test( data.viewItem, { name: true, classes: 'image' } ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Find an image element inside the figure element.\n\t\tconst viewImage = Array.from( data.viewItem.getChildren() ).find( viewChild => viewChild.is( 'img' ) );\n\n\t\t// Do not convert if image element is absent, is missing src attribute or was already converted.\n\t\tif ( !viewImage || !viewImage.hasAttribute( 'src' ) || !conversionApi.consumable.test( viewImage, { name: true } ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert view image to model image.\n\t\tconst conversionResult = conversionApi.convertItem( viewImage, data.modelCursor );\n\n\t\t// Get image element from conversion result.\n\t\tconst modelImage = first( conversionResult.modelRange.getItems() );\n\n\t\t// When image wasn't successfully converted then finish conversion.\n\t\tif ( !modelImage ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert rest of the figure element's children as an image children.\n\t\tconversionApi.convertChildren( data.viewItem, conversionApi.writer.createPositionAt( modelImage, 0 ) );\n\n\t\t// Set image range as conversion result.\n\t\tdata.modelRange = conversionResult.modelRange;\n\n\t\t// Continue conversion where image conversion ends.\n\t\tdata.modelCursor = conversionResult.modelCursor;\n\t}\n}\n\n/**\n * Converter used to convert the `srcset` model image attribute to the `srcset`, `sizes` and `width` attributes in the view.\n *\n * @returns {Function}\n */\nexport function srcsetAttributeConverter() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'attribute:srcset:image', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst writer = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\t\tconst img = figure.getChild( 0 );\n\n\t\tif ( data.attributeNewValue === null ) {\n\t\t\tconst srcset = data.attributeOldValue;\n\n\t\t\tif ( srcset.data ) {\n\t\t\t\twriter.removeAttribute( 'srcset', img );\n\t\t\t\twriter.removeAttribute( 'sizes', img );\n\n\t\t\t\tif ( srcset.width ) {\n\t\t\t\t\twriter.removeAttribute( 'width', img );\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tconst srcset = data.attributeNewValue;\n\n\t\t\tif ( srcset.data ) {\n\t\t\t\twriter.setAttribute( 'srcset', srcset.data, img );\n\t\t\t\t// Always outputting `100vw`. See https://github.com/ckeditor/ckeditor5-image/issues/2.\n\t\t\t\twriter.setAttribute( 'sizes', '100vw', img );\n\n\t\t\t\tif ( srcset.width ) {\n\t\t\t\t\twriter.setAttribute( 'width', srcset.width, img );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\nexport function modelToViewAttributeConverter( attributeKey ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( `attribute:${ attributeKey }:image`, converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\t\tconst img = figure.getChild( 0 );\n\n\t\tif ( data.attributeNewValue !== null ) {\n\t\t\tviewWriter.setAttribute( data.attributeKey, data.attributeNewValue, img );\n\t\t} else {\n\t\t\tviewWriter.removeAttribute( data.attributeKey, img );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/highlightstack\n */\n\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Class used to handle correct order of highlights on elements.\n *\n * When different highlights are applied to same element correct order should be preserved:\n *\n * * highlight with highest priority should be applied,\n * * if two highlights have same priority - sort by CSS class provided in\n * {@link module:engine/conversion/downcasthelpers~HighlightDescriptor}.\n *\n * This way, highlight will be applied with the same rules it is applied on texts.\n */\nexport default class HighlightStack {\n\t/**\n\t * Creates class instance.\n\t */\n\tconstructor() {\n\t\tthis._stack = [];\n\t}\n\n\t/**\n\t * Adds highlight descriptor to the stack.\n\t *\n\t * @fires change:top\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\tadd( descriptor, writer ) {\n\t\tconst stack = this._stack;\n\n\t\t// Save top descriptor and insert new one. If top is changed - fire event.\n\t\tconst oldTop = stack[ 0 ];\n\t\tthis._insertDescriptor( descriptor );\n\t\tconst newTop = stack[ 0 ];\n\n\t\t// When new object is at the top and stores different information.\n\t\tif ( oldTop !== newTop && !compareDescriptors( oldTop, newTop ) ) {\n\t\t\tthis.fire( 'change:top', {\n\t\t\t\toldDescriptor: oldTop,\n\t\t\t\tnewDescriptor: newTop,\n\t\t\t\twriter\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Removes highlight descriptor from the stack.\n\t *\n\t * @fires change:top\n\t * @param {String} id Id of the descriptor to remove.\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\tremove( id, writer ) {\n\t\tconst stack = this._stack;\n\n\t\tconst oldTop = stack[ 0 ];\n\t\tthis._removeDescriptor( id );\n\t\tconst newTop = stack[ 0 ];\n\n\t\t// When new object is at the top and stores different information.\n\t\tif ( oldTop !== newTop && !compareDescriptors( oldTop, newTop ) ) {\n\t\t\tthis.fire( 'change:top', {\n\t\t\t\toldDescriptor: oldTop,\n\t\t\t\tnewDescriptor: newTop,\n\t\t\t\twriter\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Inserts given descriptor in correct place in the stack. It also takes care about updating information when\n\t * descriptor with same id is already present.\n\t *\n\t * @private\n\t * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} descriptor\n\t */\n\t_insertDescriptor( descriptor ) {\n\t\tconst stack = this._stack;\n\t\tconst index = stack.findIndex( item => item.id === descriptor.id );\n\n\t\t// Inserting exact same descriptor - do nothing.\n\t\tif ( compareDescriptors( descriptor, stack[ index ] ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If descriptor with same id but with different information is on the stack - remove it.\n\t\tif ( index > -1 ) {\n\t\t\tstack.splice( index, 1 );\n\t\t}\n\n\t\t// Find correct place to insert descriptor in the stack.\n\t\t// It have different information (for example priority) so it must be re-inserted in correct place.\n\t\tlet i = 0;\n\n\t\twhile ( stack[ i ] && shouldABeBeforeB( stack[ i ], descriptor ) ) {\n\t\t\ti++;\n\t\t}\n\n\t\tstack.splice( i, 0, descriptor );\n\t}\n\n\t/**\n\t * Removes descriptor with given id from the stack.\n\t *\n\t * @private\n\t * @param {String} id Descriptor's id.\n\t */\n\t_removeDescriptor( id ) {\n\t\tconst stack = this._stack;\n\t\tconst index = stack.findIndex( item => item.id === id );\n\n\t\t// If descriptor with same id is on the list - remove it.\n\t\tif ( index > -1 ) {\n\t\t\tstack.splice( index, 1 );\n\t\t}\n\t}\n}\n\nmix( HighlightStack, EmitterMixin );\n\n// Compares two descriptors by checking their priority and class list.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} a\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} b\n// @returns {Boolean} Returns true if both descriptors are defined and have same priority and classes.\nfunction compareDescriptors( a, b ) {\n\treturn a && b && a.priority == b.priority && classesToString( a.classes ) == classesToString( b.classes );\n}\n\n// Checks whenever first descriptor should be placed in the stack before second one.\n//\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} a\n// @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} b\n// @returns {Boolean}\nfunction shouldABeBeforeB( a, b ) {\n\tif ( a.priority > b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority < b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use classes to compare.\n\treturn classesToString( a.classes ) > classesToString( b.classes );\n}\n\n// Converts CSS classes passed with {@link module:engine/conversion/downcasthelpers~HighlightDescriptor} to\n// sorted string.\n//\n// @param {String|Array<String>} descriptor\n// @returns {String}\nfunction classesToString( classes ) {\n\treturn Array.isArray( classes ) ? classes.sort().join( ',' ) : classes;\n}\n\n/**\n * Fired when top element on {@link module:widget/highlightstack~HighlightStack} has been changed\n *\n * @event change:top\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} [data.newDescriptor] New highlight\n * descriptor. It will be `undefined` when last descriptor is removed from the stack.\n * @param {module:engine/conversion/downcasthelpers~HighlightDescriptor} [data.oldDescriptor] Old highlight\n * descriptor. It will be `undefined` when first descriptor is added to the stack.\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer View writer that can be used to modify element.\n */\n","export default \"<svg viewBox=\\\"0 0 16 16\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M4 0v1H1v3H0V.5A.5.5 0 0 1 .5 0H4zm8 0h3.5a.5.5 0 0 1 .5.5V4h-1V1h-3V0zM4 16H.5a.5.5 0 0 1-.5-.5V12h1v3h3v1zm8 0v-1h3v-3h1v3.5a.5.5 0 0 1-.5.5H12z\\\"/><path fill-opacity=\\\".256\\\" d=\\\"M1 1h14v14H1z\\\"/><g class=\\\"ck-icon__selected-indicator\\\"><path d=\\\"M7 0h2v1H7V0zM0 7h1v2H0V7zm15 0h1v2h-1V7zm-8 8h2v1H7v-1z\\\"/><path fill-opacity=\\\".254\\\" d=\\\"M1 1h14v14H1z\\\"/></g></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/utils\n */\n\nimport HighlightStack from './highlightstack';\nimport IconView from '@ckeditor/ckeditor5-ui/src/icon/iconview';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport dragHandleIcon from '../theme/icons/drag-handle.svg';\n\n/**\n * CSS class added to each widget element.\n *\n * @const {String}\n */\nexport const WIDGET_CLASS_NAME = 'ck-widget';\n\n/**\n * CSS class added to currently selected widget element.\n *\n * @const {String}\n */\nexport const WIDGET_SELECTED_CLASS_NAME = 'ck-widget_selected';\n\n/**\n * Returns `true` if given {@link module:engine/view/node~Node} is an {@link module:engine/view/element~Element} and a widget.\n *\n * @param {module:engine/view/node~Node} node\n * @returns {Boolean}\n */\nexport function isWidget( node ) {\n\tif ( !node.is( 'element' ) ) {\n\t\treturn false;\n\t}\n\n\treturn !!node.getCustomProperty( 'widget' );\n}\n\n/* eslint-disable max-len */\n/**\n * Converts the given {@link module:engine/view/element~Element} to a widget in the following way:\n *\n * * sets the `contenteditable` attribute to `\"true\"`,\n * * adds the `ck-widget` CSS class,\n * * adds a custom {@link module:engine/view/element~Element#getFillerOffset `getFillerOffset()`} method returning `null`,\n * * adds a custom property allowing to recognize widget elements by using {@link ~isWidget `isWidget()`},\n * * implements the {@link ~setHighlightHandling view highlight on widgets}.\n *\n * This function needs to be used in conjunction with\n * {@link module:engine/conversion/downcasthelpers~DowncastHelpers downcast conversion helpers}\n * like {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`}.\n * Moreover, typically you will want to use `toWidget()` only for `editingDowncast`, while keeping the `dataDowncast` clean.\n *\n * For example, in order to convert a `<widget>` model element to `<div class=\"widget\">` in the view, you can define\n * such converters:\n *\n *\t\teditor.conversion.for( 'editingDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'widget',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\tconst div = writer.createContainerElement( 'div', { class: 'widget' } );\n *\n *\t\t\t\t\treturn toWidget( div, writer, { label: 'some widget' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n *\t\teditor.conversion.for( 'dataDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'widget',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\treturn writer.createContainerElement( 'div', { class: 'widget' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n * See the full source code of the widget (with a nested editable) schema definition and converters in\n * [this sample](https://github.com/ckeditor/ckeditor5-widget/blob/master/tests/manual/widget-with-nestededitable.js).\n *\n * @param {module:engine/view/element~Element} element\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {Object} [options={}]\n * @param {String|Function} [options.label] Element's label provided to the {@link ~setLabel} function. It can be passed as\n * a plain string or a function returning a string. It represents the widget for assistive technologies (like screen readers).\n * @param {Boolean} [options.hasSelectionHandle=false] If `true`, the widget will have a selection handle added.\n * @returns {module:engine/view/element~Element} Returns the same element.\n */\n/* eslint-enable max-len */\nexport function toWidget( element, writer, options = {} ) {\n\t// The selection on Edge behaves better when the whole editor contents is in a single contenteditable element.\n\t// https://github.com/ckeditor/ckeditor5/issues/1079\n\tif ( !env.isEdge ) {\n\t\twriter.setAttribute( 'contenteditable', 'false', element );\n\t}\n\n\twriter.addClass( WIDGET_CLASS_NAME, element );\n\twriter.setCustomProperty( 'widget', true, element );\n\telement.getFillerOffset = getFillerOffset;\n\n\tif ( options.label ) {\n\t\tsetLabel( element, options.label, writer );\n\t}\n\n\tif ( options.hasSelectionHandle ) {\n\t\taddSelectionHandle( element, writer );\n\t}\n\n\tsetHighlightHandling(\n\t\telement,\n\t\twriter,\n\t\t( element, descriptor, writer ) => writer.addClass( normalizeToArray( descriptor.classes ), element ),\n\t\t( element, descriptor, writer ) => writer.removeClass( normalizeToArray( descriptor.classes ), element )\n\t);\n\n\treturn element;\n\n\t// Normalizes CSS class in descriptor that can be provided in form of an array or a string.\n\tfunction normalizeToArray( classes ) {\n\t\treturn Array.isArray( classes ) ? classes : [ classes ];\n\t}\n}\n\n/**\n * Sets highlight handling methods. Uses {@link module:widget/highlightstack~HighlightStack} to\n * properly determine which highlight descriptor should be used at given time.\n *\n * @param {module:engine/view/element~Element} element\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {Function} add\n * @param {Function} remove\n */\nexport function setHighlightHandling( element, writer, add, remove ) {\n\tconst stack = new HighlightStack();\n\n\tstack.on( 'change:top', ( evt, data ) => {\n\t\tif ( data.oldDescriptor ) {\n\t\t\tremove( element, data.oldDescriptor, data.writer );\n\t\t}\n\n\t\tif ( data.newDescriptor ) {\n\t\t\tadd( element, data.newDescriptor, data.writer );\n\t\t}\n\t} );\n\n\twriter.setCustomProperty( 'addHighlight', ( element, descriptor, writer ) => stack.add( descriptor, writer ), element );\n\twriter.setCustomProperty( 'removeHighlight', ( element, id, writer ) => stack.remove( id, writer ), element );\n}\n\n/**\n * Sets label for given element.\n * It can be passed as a plain string or a function returning a string. Function will be called each time label is retrieved by\n * {@link ~getLabel `getLabel()`}.\n *\n * @param {module:engine/view/element~Element} element\n * @param {String|Function} labelOrCreator\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n */\nexport function setLabel( element, labelOrCreator, writer ) {\n\twriter.setCustomProperty( 'widgetLabel', labelOrCreator, element );\n}\n\n/**\n * Returns the label of the provided element.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {String}\n */\nexport function getLabel( element ) {\n\tconst labelCreator = element.getCustomProperty( 'widgetLabel' );\n\n\tif ( !labelCreator ) {\n\t\treturn '';\n\t}\n\n\treturn typeof labelCreator == 'function' ? labelCreator() : labelCreator;\n}\n\n/**\n * Adds functionality to the provided {@link module:engine/view/editableelement~EditableElement} to act as a widget's editable:\n *\n * * sets the `contenteditable` attribute to `true` when {@link module:engine/view/editableelement~EditableElement#isReadOnly} is `false`,\n * otherwise sets it to `false`,\n * * adds the `ck-editor__editable` and `ck-editor__nested-editable` CSS classes,\n * * adds the `ck-editor__nested-editable_focused` CSS class when the editable is focused and removes it when it is blurred.\n *\n * Similarly to {@link ~toWidget `toWidget()`} this function should be used in `dataDowncast` only and it is usually\n * used together with {@link module:engine/conversion/downcasthelpers~DowncastHelpers#elementToElement `elementToElement()`}.\n *\n * For example, in order to convert a `<nested>` model element to `<div class=\"nested\">` in the view, you can define\n * such converters:\n *\n *\t\teditor.conversion.for( 'editingDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'nested',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\tconst div = writer.createEditableElement( 'div', { class: 'nested' } );\n *\n *\t\t\t\t\treturn toWidgetEditable( nested, writer );\n *\t\t\t\t}\n *\t\t\t} );\n *\n *\t\teditor.conversion.for( 'dataDowncast' )\n *\t\t\t.elementToElement( {\n *\t\t\t\tmodel: 'nested',\n *\t\t\t\tview: ( modelItem, writer ) => {\n *\t\t\t\t\treturn writer.createContainerElement( 'div', { class: 'nested' } );\n *\t\t\t\t}\n *\t\t\t} );\n *\n * See the full source code of the widget (with nested editable) schema definition and converters in\n * [this sample](https://github.com/ckeditor/ckeditor5-widget/blob/master/tests/manual/widget-with-nestededitable.js).\n *\n * @param {module:engine/view/editableelement~EditableElement} editable\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @returns {module:engine/view/editableelement~EditableElement} Returns the same element that was provided in the `editable` parameter\n */\nexport function toWidgetEditable( editable, writer ) {\n\twriter.addClass( [ 'ck-editor__editable', 'ck-editor__nested-editable' ], editable );\n\n\t// The selection on Edge behaves better when the whole editor contents is in a single contentedible element.\n\t// https://github.com/ckeditor/ckeditor5/issues/1079\n\tif ( !env.isEdge ) {\n\t\t// Set initial contenteditable value.\n\t\twriter.setAttribute( 'contenteditable', editable.isReadOnly ? 'false' : 'true', editable );\n\n\t\t// Bind the contenteditable property to element#isReadOnly.\n\t\teditable.on( 'change:isReadOnly', ( evt, property, is ) => {\n\t\t\twriter.setAttribute( 'contenteditable', is ? 'false' : 'true', editable );\n\t\t} );\n\t}\n\n\teditable.on( 'change:isFocused', ( evt, property, is ) => {\n\t\tif ( is ) {\n\t\t\twriter.addClass( 'ck-editor__nested-editable_focused', editable );\n\t\t} else {\n\t\t\twriter.removeClass( 'ck-editor__nested-editable_focused', editable );\n\t\t}\n\t} );\n\n\treturn editable;\n}\n\n/**\n * Returns a model position which is optimal (in terms of UX) for inserting a widget block.\n *\n * For instance, if a selection is in the middle of a paragraph, the position before this paragraph\n * will be returned so that it is not split. If the selection is at the end of a paragraph,\n * the position after this paragraph will be returned.\n *\n * Note: If the selection is placed in an empty block, that block will be returned. If that position\n * is then passed to {@link module:engine/model/model~Model#insertContent},\n * the block will be fully replaced by the image.\n *\n * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} selection\n * The selection based on which the insertion position should be calculated.\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {module:engine/model/position~Position} The optimal position.\n */\nexport function findOptimalInsertionPosition( selection, model ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\tif ( selectedElement && model.schema.isBlock( selectedElement ) ) {\n\t\treturn model.createPositionAfter( selectedElement );\n\t}\n\n\tconst firstBlock = selection.getSelectedBlocks().next().value;\n\n\tif ( firstBlock ) {\n\t\t// If inserting into an empty block – return position in that block. It will get\n\t\t// replaced with the image by insertContent(). #42.\n\t\tif ( firstBlock.isEmpty ) {\n\t\t\treturn model.createPositionAt( firstBlock, 0 );\n\t\t}\n\n\t\tconst positionAfter = model.createPositionAfter( firstBlock );\n\n\t\t// If selection is at the end of the block - return position after the block.\n\t\tif ( selection.focus.isTouching( positionAfter ) ) {\n\t\t\treturn positionAfter;\n\t\t}\n\n\t\t// Otherwise return position before the block.\n\t\treturn model.createPositionBefore( firstBlock );\n\t}\n\n\treturn selection.focus;\n}\n\n/**\n * A util to be used in order to map view positions to correct model positions when implementing a widget\n * which renders non-empty view element for an empty model element.\n *\n * For example:\n *\n *\t\t// Model:\n *\t\t<placeholder type=\"name\"></placeholder>\n *\n *\t\t// View:\n *\t\t<span class=\"placeholder\">name</span>\n *\n * In such case, view positions inside `<span>` cannot be correct mapped to the model (because the model element is empty).\n * To handle mapping positions inside `<span class=\"placeholder\">` to the model use this util as follows:\n *\n *\t\teditor.editing.mapper.on(\n *\t\t\t'viewToModelPosition',\n *\t\t\tviewToModelPositionOutsideModelElement( model, viewElement => viewElement.hasClass( 'placeholder' ) )\n *\t\t);\n *\n * The callback will try to map the view offset of selection to an expected model position.\n *\n * 1. When the position is at the end (or in the middle) of the inline widget:\n *\n *\t\t// View:\n *\t\t<p>foo <span class=\"placeholder\">name|</span> bar</p>\n *\n *\t\t// Model:\n *\t\t<paragraph>foo <placeholder type=\"name\"></placeholder>| bar</paragraph>\n *\n * 2. When the position is at the beginning of the inline widget:\n *\n *\t\t// View:\n *\t\t<p>foo <span class=\"placeholder\">|name</span> bar</p>\n *\n *\t\t// Model:\n *\t\t<paragraph>foo |<placeholder type=\"name\"></placeholder> bar</paragraph>\n *\n * @param {module:engine/model/model~Model} model Model instance on which the callback operates.\n * @param {Function} viewElementMatcher Function that is passed a view element and should return `true` if the custom mapping\n * should be applied to the given view element.\n * @return {Function}\n */\nexport function viewToModelPositionOutsideModelElement( model, viewElementMatcher ) {\n\treturn ( evt, data ) => {\n\t\tconst { mapper, viewPosition } = data;\n\n\t\tconst viewParent = mapper.findMappedViewAncestor( viewPosition );\n\n\t\tif ( !viewElementMatcher( viewParent ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelParent = mapper.toModelElement( viewParent );\n\n\t\tdata.modelPosition = model.createPositionAt( modelParent, viewPosition.isAtStart ? 'before' : 'after' );\n\t};\n}\n\n// Default filler offset function applied to all widget elements.\n//\n// @returns {null}\nfunction getFillerOffset() {\n\treturn null;\n}\n\n// Adds a drag handle to the widget.\n//\n// @param {module:engine/view/containerelement~ContainerElement}\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction addSelectionHandle( widgetElement, writer ) {\n\tconst selectionHandle = writer.createUIElement( 'div', { class: 'ck ck-widget__selection-handle' }, function( domDocument ) {\n\t\tconst domElement = this.toDomElement( domDocument );\n\n\t\t// Use the IconView from the ui library.\n\t\tconst icon = new IconView();\n\t\ticon.set( 'content', dragHandleIcon );\n\n\t\t// Render the icon view right away to append its #element to the selectionHandle DOM element.\n\t\ticon.render();\n\n\t\tdomElement.appendChild( icon.element );\n\n\t\treturn domElement;\n\t} );\n\n\t// Append the selection handle into the widget wrapper.\n\twriter.insert( writer.createPositionAt( widgetElement, 0 ), selectionHandle );\n\twriter.addClass( [ 'ck-widget_with-selection-handle' ], widgetElement );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/utils\n */\n\nimport { findOptimalInsertionPosition, isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to an image widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the image widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label. It will be concatenated with the image `alt` attribute if one is present.\n * @returns {module:engine/view/element~Element}\n */\nexport function toImageWidget( viewElement, writer, label ) {\n\twriter.setCustomProperty( 'image', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { label: labelCreator } );\n\n\tfunction labelCreator() {\n\t\tconst imgElement = viewElement.getChild( 0 );\n\t\tconst altText = imgElement.getAttribute( 'alt' );\n\n\t\treturn altText ? `${ altText } ${ label }` : label;\n\t}\n}\n\n/**\n * Checks if a given view element is an image widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isImageWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'image' ) && isWidget( viewElement );\n}\n\n/**\n * Returns an image widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedImageWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isImageWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Checks if the provided model element is an `image`.\n *\n * @param {module:engine/model/element~Element} modelElement\n * @returns {Boolean}\n */\nexport function isImage( modelElement ) {\n\treturn !!modelElement && modelElement.is( 'image' );\n}\n\n/**\n * Handles inserting single file. This method unifies image insertion using {@link module:widget/utils~findOptimalInsertionPosition} method.\n *\n *\t\tmodel.change( writer => {\n *\t\t\tinsertImage( writer, model, { src: 'path/to/image.jpg' } );\n *\t\t} );\n *\n * @param {module:engine/model/writer~Writer} writer\n * @param {module:engine/model/model~Model} model\n * @param {Object} [attributes={}] Attributes of inserted image\n */\nexport function insertImage( writer, model, attributes = {} ) {\n\tconst imageElement = writer.createElement( 'image', attributes );\n\n\tconst insertAtSelection = findOptimalInsertionPosition( model.document.selection, model );\n\n\tmodel.insertContent( imageElement, insertAtSelection );\n\n\t// Inserting an image might've failed due to schema regulations.\n\tif ( imageElement.parent ) {\n\t\twriter.setSelection( imageElement, 'on' );\n\t}\n}\n\n/**\n * Checks if image can be inserted at current model selection.\n *\n * @param {module:engine/model/model~Model} model\n * @returns {Boolean}\n */\nexport function isImageAllowed( model ) {\n\tconst schema = model.schema;\n\tconst selection = model.document.selection;\n\n\treturn isImageAllowedInParent( selection, schema, model ) &&\n\t\t!checkSelectionOnObject( selection, schema ) &&\n\t\tisInOtherImage( selection );\n}\n\n// Checks if image is allowed by schema in optimal insertion parent.\n//\n// @returns {Boolean}\nfunction isImageAllowedInParent( selection, schema, model ) {\n\tconst parent = getInsertImageParent( selection, model );\n\n\treturn schema.checkChild( parent, 'image' );\n}\n\n// Check if selection is on object.\n//\n// @returns {Boolean}\nfunction checkSelectionOnObject( selection, schema ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\treturn selectedElement && schema.isObject( selectedElement );\n}\n\n// Checks if selection is placed in other image (ie. in caption).\nfunction isInOtherImage( selection ) {\n\treturn [ ...selection.focus.getAncestors() ].every( ancestor => !ancestor.is( 'image' ) );\n}\n\n// Returns a node that will be used to insert image with `model.insertContent` to check if image can be placed there.\nfunction getInsertImageParent( selection, model ) {\n\tconst insertAt = findOptimalInsertionPosition( selection, model );\n\n\tconst parent = insertAt.parent;\n\n\tif ( parent.isEmpty && !parent.is( '$root' ) ) {\n\t\treturn parent.parent;\n\t}\n\n\treturn parent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { insertImage, isImageAllowed } from './utils';\n\n/**\n * @module image/image/imageinsertcommand\n */\n\n/**\n * Insert image command.\n *\n * The command is registered by the {@link module:image/image/imageediting~ImageEditing} plugin as `'imageInsert'`.\n *\n * In order to insert an image at the current selection position\n * (according to the {@link module:widget/utils~findOptimalInsertionPosition} algorithm),\n * execute the command and specify the image source:\n *\n *\t\teditor.execute( 'imageInsert', { source: 'http://url.to.the/image' } );\n *\n * It is also possible to insert multiple images at once:\n *\n *\t\teditor.execute( 'imageInsert', {\n *\t\t\tsource: [\n *\t\t\t\t'path/to/image.jpg',\n *\t\t\t\t'path/to/other-image.jpg'\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:core/command~Command\n */\nexport default class ImageInsertCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = isImageAllowed( this.editor.model );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options Options for the executed command.\n\t * @param {String|Array.<String>} options.source The image source or an array of image sources to insert.\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\n\t\tmodel.change( writer => {\n\t\t\tconst sources = Array.isArray( options.source ) ? options.source : [ options.source ];\n\n\t\t\tfor ( const src of sources ) {\n\t\t\t\tinsertImage( writer, model, { src } );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/image/imageediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageLoadObserver from './imageloadobserver';\nimport {\n viewFigureToModel,\n modelToViewAttributeConverter,\n srcsetAttributeConverter\n} from './converters';\nimport { toImageWidget } from './utils';\nimport ImageInsertCommand from './imageinsertcommand';\n/**\n * The image engine plugin.\n *\n * It registers:\n *\n * * `<image>` as a block element in the document schema, and allows `alt`, `src` and `srcset` attributes.\n * * converters for editing and data pipelines.\n * * `'imageInsert'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const schema = editor.model.schema;\n const t = editor.t;\n const conversion = editor.conversion;\n // See https://github.com/ckeditor/ckeditor5-image/issues/142.\n editor.editing.view.addObserver(ImageLoadObserver);\n // Configure schema.\n schema.register('image', {\n isObject: true,\n isBlock: true,\n allowWhere: '$block',\n allowAttributes: [\n 'alt',\n 'src',\n 'srcset'\n ]\n });\n conversion.for('dataDowncast').elementToElement({\n model: 'image',\n view: (modelElement, viewWriter) => createImageViewElement(viewWriter)\n });\n conversion.for('editingDowncast').elementToElement({\n model: 'image',\n view: (modelElement, viewWriter) => toImageWidget(createImageViewElement(viewWriter), viewWriter, t('i'))\n });\n conversion.for('downcast').add(modelToViewAttributeConverter('src')).add(modelToViewAttributeConverter('alt')).add(srcsetAttributeConverter());\n conversion.for('upcast').elementToElement({\n view: {\n name: 'img',\n attributes: { src: true }\n },\n model: (viewImage, modelWriter) => modelWriter.createElement('image', { src: viewImage.getAttribute('src') })\n }).attributeToAttribute({\n view: {\n name: 'img',\n key: 'alt'\n },\n model: 'alt'\n }).attributeToAttribute({\n view: {\n name: 'img',\n key: 'srcset'\n },\n model: {\n key: 'srcset',\n value: viewImage => {\n const value = { data: viewImage.getAttribute('srcset') };\n if (viewImage.hasAttribute('width')) {\n value.width = viewImage.getAttribute('width');\n }\n return value;\n }\n }\n }).add(viewFigureToModel());\n // Register imageUpload command.\n editor.commands.add('imageInsert', new ImageInsertCommand(editor));\n }\n}\n// Creates a view element representing the image.\n//\n//\t\t<figure class=\"image\"><img></img></figure>\n//\n// Note that `alt` and `src` attributes are converted separately, so they are not included.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/containerelement~ContainerElement}\nexport function createImageViewElement(writer) {\n const emptyElement = writer.createEmptyElement('img');\n const figure = writer.createContainerElement('figure', { class: 'image' });\n writer.insert(writer.createPositionAt(figure, 0), emptyElement);\n return figure;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/findlinkrange\n */\n\n/**\n * Returns a range containing the entire link in which the given `position` is placed.\n *\n * It can be used e.g. to get the entire range on which the `linkHref` attribute needs to be changed when having a\n * selection inside a link.\n *\n * @param {module:engine/model/position~Position} position The start position.\n * @param {String} value The `linkHref` attribute value.\n * @returns {module:engine/model/range~Range} The link range.\n */\nexport default function findLinkRange( position, value, model ) {\n\treturn model.createRange( _findBound( position, value, true, model ), _findBound( position, value, false, model ) );\n}\n\n// Walks forward or backward (depends on the `lookBack` flag), node by node, as long as they have the same `linkHref` attribute value\n// and returns a position just before or after (depends on the `lookBack` flag) the last matched node.\n//\n// @param {module:engine/model/position~Position} position The start position.\n// @param {String} value The `linkHref` attribute value.\n// @param {Boolean} lookBack Whether the walk direction is forward (`false`) or backward (`true`).\n// @returns {module:engine/model/position~Position} The position just before the last matched node.\nfunction _findBound( position, value, lookBack, model ) {\n\t// Get node before or after position (depends on `lookBack` flag).\n\t// When position is inside text node then start searching from text node.\n\tlet node = position.textNode || ( lookBack ? position.nodeBefore : position.nodeAfter );\n\n\tlet lastNode = null;\n\n\twhile ( node && node.getAttribute( 'linkHref' ) == value ) {\n\t\tlastNode = node;\n\t\tnode = lookBack ? node.previousSibling : node.nextSibling;\n\t}\n\n\treturn lastNode ? model.createPositionAt( lastNode, lookBack ? 'before' : 'after' ) : position;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/linkcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport findLinkRange from './findlinkrange';\nimport toMap from '@ckeditor/ckeditor5-utils/src/tomap';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\n\n/**\n * The link command. It is used by the {@link module:link/link~Link link feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class LinkCommand extends Command {\n\t/**\n\t * The value of the `'linkHref'` attribute if the start of the selection is located in a node with this attribute.\n\t *\n\t * @observable\n\t * @readonly\n\t * @member {Object|undefined} #value\n\t */\n\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * A collection of {@link module:link/utils~ManualDecorator manual decorators}\n\t\t * corresponding to the {@link module:link/link~LinkConfig#decorators decorator configuration}.\n\t\t *\n\t\t * You can consider it a model with states of manual decorators added to the currently selected link.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:utils/collection~Collection}\n\t\t */\n\t\tthis.manualDecorators = new Collection();\n\t}\n\n\t/**\n\t * Synchronizes the state of {@link #manualDecorators} with the currently present elements in the model.\n\t */\n\trestoreManualDecoratorStates() {\n\t\tfor ( const manualDecorator of this.manualDecorators ) {\n\t\t\tmanualDecorator.value = this._getDecoratorStateFromModel( manualDecorator.id );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tthis.value = doc.selection.getAttribute( 'linkHref' );\n\n\t\tfor ( const manualDecorator of this.manualDecorators ) {\n\t\t\tmanualDecorator.value = this._getDecoratorStateFromModel( manualDecorator.id );\n\t\t}\n\n\t\tthis.isEnabled = model.schema.checkAttributeInSelection( doc.selection, 'linkHref' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is non-collapsed, the `linkHref` attribute will be applied to nodes inside the selection, but only to\n\t * those nodes where the `linkHref` attribute is allowed (disallowed nodes will be omitted).\n\t *\n\t * When the selection is collapsed and is not inside the text with the `linkHref` attribute, a\n\t * new {@link module:engine/model/text~Text text node} with the `linkHref` attribute will be inserted in place of the caret, but\n\t * only if such element is allowed in this place. The `_data` of the inserted text will equal the `href` parameter.\n\t * The selection will be updated to wrap the just inserted text node.\n\t *\n\t * When the selection is collapsed and inside the text with the `linkHref` attribute, the attribute value will be updated.\n\t *\n\t * # Decorators and model attribute management\n\t *\n\t * There is an optional argument to this command that applies or removes model\n\t * {@glink framework/guides/architecture/editing-engine#text-attributes text attributes} brought by\n\t * {@link module:link/utils~ManualDecorator manual link decorators}.\n\t *\n\t * Text attribute names in the model correspond to the entries in the {@link module:link/link~LinkConfig#decorators configuration}.\n\t * For every decorator configured, a model text attribute exists with the \"link\" prefix. For example, a `'linkMyDecorator'` attribute\n\t * corresponds to `'myDecorator'` in the configuration.\n\t *\n\t * To learn more about link decorators, check out the {@link module:link/link~LinkConfig#decorators `config.link.decorators`}\n\t * documentation.\n\t *\n\t * Here is how to manage decorator attributes with the link command:\n\t *\n\t *\t\tconst linkCommand = editor.commands.get( 'link' );\n\t *\n\t *\t\t// Adding a new decorator attribute.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: true\n\t *\t\t} );\n\t *\n\t *\t\t// Removing a decorator attribute from the selection.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: false\n\t *\t\t} );\n\t *\n\t *\t\t// Adding multiple decorator attributes at the same time.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: true,\n\t *\t\t\tlinkIsDownloadable: true,\n\t *\t\t} );\n\t *\n\t *\t\t// Removing and adding decorator attributes at the same time.\n\t *\t\tlinkCommand.execute( 'http://example.com', {\n\t *\t\t\tlinkIsExternal: false,\n\t *\t\t\tlinkFoo: true,\n\t *\t\t\tlinkIsDownloadable: false,\n\t *\t\t} );\n\t *\n\t * **Note**: If the decorator attribute name is not specified, its state remains untouched.\n\t *\n\t * **Note**: {@link module:link/unlinkcommand~UnlinkCommand#execute `UnlinkCommand#execute()`} removes all\n\t * decorator attributes.\n\t *\n\t * @fires execute\n\t * @param {String} href Link destination.\n\t * @param {Object} [manualDecoratorIds={}] The information about manual decorator attributes to be applied or removed upon execution.\n\t */\n\texecute( href, manualDecoratorIds = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\t// Stores information about manual decorators to turn them on/off when command is applied.\n\t\tconst truthyManualDecorators = [];\n\t\tconst falsyManualDecorators = [];\n\n\t\tfor ( const name in manualDecoratorIds ) {\n\t\t\tif ( manualDecoratorIds[ name ] ) {\n\t\t\t\ttruthyManualDecorators.push( name );\n\t\t\t} else {\n\t\t\t\tfalsyManualDecorators.push( name );\n\t\t\t}\n\t\t}\n\n\t\tmodel.change( writer => {\n\t\t\t// If selection is collapsed then update selected link or insert new one at the place of caret.\n\t\t\tif ( selection.isCollapsed ) {\n\t\t\t\tconst position = selection.getFirstPosition();\n\n\t\t\t\t// When selection is inside text with `linkHref` attribute.\n\t\t\t\tif ( selection.hasAttribute( 'linkHref' ) ) {\n\t\t\t\t\t// Then update `linkHref` value.\n\t\t\t\t\tconst linkRange = findLinkRange( position, selection.getAttribute( 'linkHref' ), model );\n\n\t\t\t\t\twriter.setAttribute( 'linkHref', href, linkRange );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.setAttribute( item, true, linkRange );\n\t\t\t\t\t} );\n\n\t\t\t\t\tfalsyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.removeAttribute( item, linkRange );\n\t\t\t\t\t} );\n\n\t\t\t\t\t// Create new range wrapping changed link.\n\t\t\t\t\twriter.setSelection( linkRange );\n\t\t\t\t}\n\t\t\t\t// If not then insert text node with `linkHref` attribute in place of caret.\n\t\t\t\t// However, since selection in collapsed, attribute value will be used as data for text node.\n\t\t\t\t// So, if `href` is empty, do not create text node.\n\t\t\t\telse if ( href !== '' ) {\n\t\t\t\t\tconst attributes = toMap( selection.getAttributes() );\n\n\t\t\t\t\tattributes.set( 'linkHref', href );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\tattributes.set( item, true );\n\t\t\t\t\t} );\n\n\t\t\t\t\tconst node = writer.createText( href, attributes );\n\n\t\t\t\t\tmodel.insertContent( node, position );\n\n\t\t\t\t\t// Create new range wrapping created node.\n\t\t\t\t\twriter.setSelection( writer.createRangeOn( node ) );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// If selection has non-collapsed ranges, we change attribute on nodes inside those ranges\n\t\t\t\t// omitting nodes where `linkHref` attribute is disallowed.\n\t\t\t\tconst ranges = model.schema.getValidRanges( selection.getRanges(), 'linkHref' );\n\n\t\t\t\tfor ( const range of ranges ) {\n\t\t\t\t\twriter.setAttribute( 'linkHref', href, range );\n\n\t\t\t\t\ttruthyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.setAttribute( item, true, range );\n\t\t\t\t\t} );\n\n\t\t\t\t\tfalsyManualDecorators.forEach( item => {\n\t\t\t\t\t\twriter.removeAttribute( item, range );\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Provides information whether a decorator with a given name is present in the currently processed selection.\n\t *\n\t * @private\n\t * @param {String} decoratorName The name of the manual decorator used in the model\n\t * @returns {Boolean} The information whether a given decorator is currently present in the selection.\n\t */\n\t_getDecoratorStateFromModel( decoratorName ) {\n\t\tconst doc = this.editor.model.document;\n\t\treturn doc.selection.getAttribute( decoratorName ) || false;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/unlinkcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport findLinkRange from './findlinkrange';\n\n/**\n * The unlink command. It is used by the {@link module:link/link~Link link plugin}.\n *\n * @extends module:core/command~Command\n */\nexport default class UnlinkCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this.editor.model.document.selection.hasAttribute( 'linkHref' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is collapsed, it removes the `linkHref` attribute from each node with the same `linkHref` attribute value.\n\t * When the selection is non-collapsed, it removes the `linkHref` attribute from each node in selected ranges.\n\t *\n\t * # Decorators\n\t *\n\t * If {@link module:link/link~LinkConfig#decorators `config.link.decorators`} is specified,\n\t * all configured decorators are removed together with the `linkHref` attribute.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst linkCommand = editor.commands.get( 'link' );\n\n\t\tmodel.change( writer => {\n\t\t\t// Get ranges to unlink.\n\t\t\tconst rangesToUnlink = selection.isCollapsed ?\n\t\t\t\t[ findLinkRange( selection.getFirstPosition(), selection.getAttribute( 'linkHref' ), model ) ] : selection.getRanges();\n\n\t\t\t// Remove `linkHref` attribute from specified ranges.\n\t\t\tfor ( const range of rangesToUnlink ) {\n\t\t\t\twriter.removeAttribute( 'linkHref', range );\n\t\t\t\t// If there are registered custom attributes, then remove them during unlink.\n\t\t\t\tif ( linkCommand ) {\n\t\t\t\t\tfor ( const manualDecorator of linkCommand.manualDecorators ) {\n\t\t\t\t\t\twriter.removeAttribute( manualDecorator.id, range );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n","import baseSlice from './_baseSlice.js';\n\n/**\n * Casts `array` to a slice if it's needed.\n *\n * @private\n * @param {Array} array The array to inspect.\n * @param {number} start The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the cast slice.\n */\nfunction castSlice(array, start, end) {\n var length = array.length;\n end = end === undefined ? length : end;\n return (!start && end >= length) ? array : baseSlice(array, start, end);\n}\n\nexport default castSlice;\n","/**\n * The base implementation of `_.slice` without an iteratee call guard.\n *\n * @private\n * @param {Array} array The array to slice.\n * @param {number} [start=0] The start position.\n * @param {number} [end=array.length] The end position.\n * @returns {Array} Returns the slice of `array`.\n */\nfunction baseSlice(array, start, end) {\n var index = -1,\n length = array.length;\n\n if (start < 0) {\n start = -start > length ? 0 : (length + start);\n }\n end = end > length ? length : end;\n if (end < 0) {\n end += length;\n }\n length = start > end ? 0 : ((end - start) >>> 0);\n start >>>= 0;\n\n var result = Array(length);\n while (++index < length) {\n result[index] = array[index + start];\n }\n return result;\n}\n\nexport default baseSlice;\n","/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff',\n rsComboMarksRange = '\\\\u0300-\\\\u036f',\n reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n rsVarRange = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsZWJ = '\\\\u200d';\n\n/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */\nvar reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');\n\n/**\n * Checks if `string` contains Unicode symbols.\n *\n * @private\n * @param {string} string The string to inspect.\n * @returns {boolean} Returns `true` if a symbol is found, else `false`.\n */\nfunction hasUnicode(string) {\n return reHasUnicode.test(string);\n}\n\nexport default hasUnicode;\n","/** Used to compose unicode character classes. */\nvar rsAstralRange = '\\\\ud800-\\\\udfff',\n rsComboMarksRange = '\\\\u0300-\\\\u036f',\n reComboHalfMarksRange = '\\\\ufe20-\\\\ufe2f',\n rsComboSymbolsRange = '\\\\u20d0-\\\\u20ff',\n rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,\n rsVarRange = '\\\\ufe0e\\\\ufe0f';\n\n/** Used to compose unicode capture groups. */\nvar rsAstral = '[' + rsAstralRange + ']',\n rsCombo = '[' + rsComboRange + ']',\n rsFitz = '\\\\ud83c[\\\\udffb-\\\\udfff]',\n rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',\n rsNonAstral = '[^' + rsAstralRange + ']',\n rsRegional = '(?:\\\\ud83c[\\\\udde6-\\\\uddff]){2}',\n rsSurrPair = '[\\\\ud800-\\\\udbff][\\\\udc00-\\\\udfff]',\n rsZWJ = '\\\\u200d';\n\n/** Used to compose unicode regexes. */\nvar reOptMod = rsModifier + '?',\n rsOptVar = '[' + rsVarRange + ']?',\n rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',\n rsSeq = rsOptVar + reOptMod + rsOptJoin,\n rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';\n\n/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */\nvar reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');\n\n/**\n * Converts a Unicode `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction unicodeToArray(string) {\n return string.match(reUnicode) || [];\n}\n\nexport default unicodeToArray;\n","import asciiToArray from './_asciiToArray.js';\nimport hasUnicode from './_hasUnicode.js';\nimport unicodeToArray from './_unicodeToArray.js';\n\n/**\n * Converts `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction stringToArray(string) {\n return hasUnicode(string)\n ? unicodeToArray(string)\n : asciiToArray(string);\n}\n\nexport default stringToArray;\n","/**\n * Converts an ASCII `string` to an array.\n *\n * @private\n * @param {string} string The string to convert.\n * @returns {Array} Returns the converted array.\n */\nfunction asciiToArray(string) {\n return string.split('');\n}\n\nexport default asciiToArray;\n","import Symbol from './_Symbol.js';\nimport arrayMap from './_arrayMap.js';\nimport isArray from './isArray.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar INFINITY = 1 / 0;\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolToString = symbolProto ? symbolProto.toString : undefined;\n\n/**\n * The base implementation of `_.toString` which doesn't convert nullish\n * values to empty strings.\n *\n * @private\n * @param {*} value The value to process.\n * @returns {string} Returns the string.\n */\nfunction baseToString(value) {\n // Exit early for strings to avoid a performance hit in some environments.\n if (typeof value == 'string') {\n return value;\n }\n if (isArray(value)) {\n // Recursively convert values (susceptible to call stack limits).\n return arrayMap(value, baseToString) + '';\n }\n if (isSymbol(value)) {\n return symbolToString ? symbolToString.call(value) : '';\n }\n var result = (value + '');\n return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;\n}\n\nexport default baseToString;\n","/**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\nfunction arrayMap(array, iteratee) {\n var index = -1,\n length = array == null ? 0 : array.length,\n result = Array(length);\n\n while (++index < length) {\n result[index] = iteratee(array[index], index, array);\n }\n return result;\n}\n\nexport default arrayMap;\n","import createCaseFirst from './_createCaseFirst.js';\n\n/**\n * Converts the first character of `string` to upper case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.upperFirst('fred');\n * // => 'Fred'\n *\n * _.upperFirst('FRED');\n * // => 'FRED'\n */\nvar upperFirst = createCaseFirst('toUpperCase');\n\nexport default upperFirst;\n","import castSlice from './_castSlice.js';\nimport hasUnicode from './_hasUnicode.js';\nimport stringToArray from './_stringToArray.js';\nimport toString from './toString.js';\n\n/**\n * Creates a function like `_.lowerFirst`.\n *\n * @private\n * @param {string} methodName The name of the `String` case method to use.\n * @returns {Function} Returns the new case function.\n */\nfunction createCaseFirst(methodName) {\n return function(string) {\n string = toString(string);\n\n var strSymbols = hasUnicode(string)\n ? stringToArray(string)\n : undefined;\n\n var chr = strSymbols\n ? strSymbols[0]\n : string.charAt(0);\n\n var trailing = strSymbols\n ? castSlice(strSymbols, 1).join('')\n : string.slice(1);\n\n return chr[methodName]() + trailing;\n };\n}\n\nexport default createCaseFirst;\n","import baseToString from './_baseToString.js';\n\n/**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\nfunction toString(value) {\n return value == null ? '' : baseToString(value);\n}\n\nexport default toString;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/utils\n */\nimport { upperFirst } from 'lodash-es';\nconst ATTRIBUTE_WHITESPACES = /[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205f\\u3000]/g;\n// eslint-disable-line no-control-regex\nconst SAFE_URL = /^(?:(?:https?|ftps?|mailto):|[^a-z]|[a-z+.-]+(?:[^a-z+.:-]|$))/i;\n/**\n * Returns `true` if a given view node is the link element.\n *\n * @param {module:engine/view/node~Node} node\n * @returns {Boolean}\n */\nexport function isLinkElement(node) {\n return node.is('attributeElement') && !!node.getCustomProperty('link');\n}\n/**\n * Creates link {@link module:engine/view/attributeelement~AttributeElement} with the provided `href` attribute.\n *\n * @param {String} href\n * @returns {module:engine/view/attributeelement~AttributeElement}\n */\nexport function createLinkElement(href, writer) {\n // Priority 5 - https://github.com/ckeditor/ckeditor5-link/issues/121.\n const linkElement = writer.createAttributeElement('a', { href }, { priority: 5 });\n writer.setCustomProperty('link', true, linkElement);\n return linkElement;\n}\n/**\n * Returns a safe URL based on a given value.\n *\n * A URL is considered safe if it is safe for the user (does not contain any malicious code).\n *\n * If a URL is considered unsafe, a simple `\"#\"` is returned.\n *\n * @protected\n * @param {*} url\n * @returns {String} Safe URL.\n */\nexport function ensureSafeUrl(url) {\n url = String(url);\n return isSafeUrl(url) ? url : '#';\n}\n// Checks whether the given URL is safe for the user (does not contain any malicious code).\n//\n// @param {String} url URL to check.\nfunction isSafeUrl(url) {\n const normalizedUrl = url.replace(ATTRIBUTE_WHITESPACES, '');\n return normalizedUrl.match(SAFE_URL);\n}\n/**\n * Returns the {@link module:link/link~LinkConfig#decorators `config.link.decorators`} configuration processed\n * to respect the locale of the editor, i.e. to display the {@link module:link/link~LinkDecoratorManualDefinition label}\n * in the correct language.\n *\n * **Note**: Only the few most commonly used labels are translated automatically. Other labels should be manually\n * translated in the {@link module:link/link~LinkConfig#decorators `config.link.decorators`} configuration.\n *\n * @param {module:utils/locale~Locale#t} t shorthand for {@link module:utils/locale~Locale#t Locale#t}\n * @param {Array.<module:link/link~LinkDecoratorDefinition>} The decorator reference\n * where the label values should be localized.\n * @returns {Array.<module:link/link~LinkDecoratorDefinition>}\n */\nexport function getLocalizedDecorators(t, decorators) {\n const localizedDecoratorsLabels = {\n 'Open in a new tab': t('az'),\n 'Downloadable': t('ba')\n };\n decorators.forEach(decorator => {\n if (decorator.label && localizedDecoratorsLabels[decorator.label]) {\n decorator.label = localizedDecoratorsLabels[decorator.label];\n }\n return decorator;\n });\n return decorators;\n}\n/**\n * Converts an object with defined decorators to a normalized array of decorators. The `id` key is added for each decorator and\n * is used as the attribute's name in the model.\n *\n * @param {Object.<String, module:link/link~LinkDecoratorDefinition>} decorators\n * @returns {Array.<module:link/link~LinkDecoratorDefinition>}\n */\nexport function normalizeDecorators(decorators) {\n const retArray = [];\n if (decorators) {\n for (const [key, value] of Object.entries(decorators)) {\n const decorator = Object.assign({}, value, { id: `link${ upperFirst(key) }` });\n retArray.push(decorator);\n }\n }\n return retArray;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module link/utils\n */\n\n/**\n * Helper class that ties together all {@link module:link/link~LinkDecoratorAutomaticDefinition} and provides\n * a {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement downcast dispatcher} for them.\n */\nexport default class AutomaticDecorators {\n\tconstructor() {\n\t\t/**\n\t\t * Stores the definition of {@link module:link/link~LinkDecoratorAutomaticDefinition automatic decorators}.\n\t\t * This data is used as a source for a downcast dispatcher to create a proper conversion to output data.\n\t\t *\n\t\t * @private\n\t\t * @type {Set}\n\t\t */\n\t\tthis._definitions = new Set();\n\t}\n\n\t/**\n\t * Gives information about the number of decorators stored in the {@link module:link/utils~AutomaticDecorators} instance.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Number}\n\t */\n\tget length() {\n\t\treturn this._definitions.size;\n\t}\n\n\t/**\n\t * Adds automatic decorator objects or an array with them to be used during downcasting.\n\t *\n\t * @param {module:link/link~LinkDecoratorAutomaticDefinition|Array.<module:link/link~LinkDecoratorAutomaticDefinition>} item\n\t * A configuration object of automatic rules for decorating links. It might also be an array of such objects.\n\t */\n\tadd( item ) {\n\t\tif ( Array.isArray( item ) ) {\n\t\t\titem.forEach( item => this._definitions.add( item ) );\n\t\t} else {\n\t\t\tthis._definitions.add( item );\n\t\t}\n\t}\n\n\t/**\n\t * Provides the conversion helper used in the {@link module:engine/conversion/downcasthelpers~DowncastHelpers#add} method.\n\t *\n\t * @returns {Function} A dispatcher function used as conversion helper\n\t * in {@link module:engine/conversion/downcasthelpers~DowncastHelpers#add}.\n\t */\n\tgetDispatcher() {\n\t\treturn dispatcher => {\n\t\t\tdispatcher.on( 'attribute:linkHref', ( evt, data, conversionApi ) => {\n\t\t\t\t// There is only test as this behavior decorates links and\n\t\t\t\t// it is run before dispatcher which actually consumes this node.\n\t\t\t\t// This allows on writing own dispatcher with highest priority,\n\t\t\t\t// which blocks both native converter and this additional decoration.\n\t\t\t\tif ( !conversionApi.consumable.test( data.item, 'attribute:linkHref' ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\tconst viewWriter = conversionApi.writer;\n\t\t\t\tconst viewSelection = viewWriter.document.selection;\n\n\t\t\t\tfor ( const item of this._definitions ) {\n\t\t\t\t\tconst viewElement = viewWriter.createAttributeElement( 'a', item.attributes, {\n\t\t\t\t\t\tpriority: 5\n\t\t\t\t\t} );\n\t\t\t\t\tviewWriter.setCustomProperty( 'link', true, viewElement );\n\t\t\t\t\tif ( item.callback( data.attributeNewValue ) ) {\n\t\t\t\t\t\tif ( data.item.is( 'selection' ) ) {\n\t\t\t\t\t\t\tviewWriter.wrap( viewSelection.getFirstRange(), viewElement );\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tviewWriter.wrap( conversionApi.mapper.toViewRange( data.range ), viewElement );\n\t\t\t\t\t\t}\n\t\t\t\t\t} else {\n\t\t\t\t\t\tviewWriter.unwrap( conversionApi.mapper.toViewRange( data.range ), viewElement );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}, { priority: 'high' } );\n\t\t};\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/utils\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Helper class that stores manual decorators with observable {@link module:link/utils~ManualDecorator#value}\n * to support integration with the UI state. An instance of this class is a model with the state of individual manual decorators.\n * These decorators are kept as collections in {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class ManualDecorator {\n\t/**\n\t * Creates a new instance of {@link module:link/utils~ManualDecorator}.\n\t *\n\t * @param {Object} config\n\t * @param {String} config.id The name of the attribute used in the model that represents a given manual decorator.\n\t * For example: `'linkIsExternal'`.\n\t * @param {String} config.label The label used in the user interface to toggle the manual decorator.\n\t * @param {Object} config.attributes A set of attributes added to output data when the decorator is active for a specific link.\n\t * Attributes should keep the format of attributes defined in {@link module:engine/view/elementdefinition~ElementDefinition}.\n\t */\n\tconstructor( { id, label, attributes } ) {\n\t\t/**\n\t\t * An ID of a manual decorator which is the name of the attribute in the model, for example: 'linkManualDecorator0'.\n\t\t *\n\t\t * @type {String}\n\t\t */\n\t\tthis.id = id;\n\n\t\t/**\n\t\t * The value of the current manual decorator. It reflects its state from the UI.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} module:link/utils~ManualDecorator#value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * The label used in the user interface to toggle the manual decorator.\n\t\t *\n\t\t * @type {String}\n\t\t */\n\t\tthis.label = label;\n\n\t\t/**\n\t\t * A set of attributes added to downcasted data when the decorator is activated for a specific link.\n\t\t * Attributes should be added in a form of attributes defined in {@link module:engine/view/elementdefinition~ElementDefinition}.\n\t\t *\n\t\t * @type {Object}\n\t\t */\n\t\tthis.attributes = attributes;\n\t}\n}\n\nmix( ManualDecorator, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/utils/bindtwostepcarettoattribute\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport priorities from '@ckeditor/ckeditor5-utils/src/priorities';\n\n/**\n * This helper enables the two-step caret (phantom) movement behavior for the given {@link module:engine/model/model~Model}\n * attribute on arrow right (<kbd>→</kbd>) and left (<kbd>←</kbd>) key press.\n *\n * Thanks to this (phantom) caret movement the user is able to type before/after as well as at the\n * beginning/end of an attribute.\n *\n * **Note:** This helper support right–to–left (Arabic, Hebrew, etc.) content by mirroring its behavior\n * but for the sake of simplicity examples showcase only left–to–right use–cases.\n *\n * # Forward movement\n *\n * ## \"Entering\" an attribute:\n *\n * When this behavior is enabled for the `a` attribute and the selection is right before it\n * (at the attribute boundary), pressing the right arrow key will not move the selection but update its\n * attributes accordingly:\n *\n * * When enabled:\n *\n * \t\tfoo{}<$text a=\"true\">bar</$text>\n *\n * <kbd>→</kbd>\n *\n * \t\tfoo<$text a=\"true\">{}bar</$text>\n *\n * * When disabled:\n *\n * \t\tfoo{}<$text a=\"true\">bar</$text>\n *\n * <kbd>→</kbd>\n *\n * \t\tfoo<$text a=\"true\">b{}ar</$text>\n *\n *\n * ## \"Leaving\" an attribute:\n *\n * * When enabled:\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * <kbd>→</kbd>\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * * When disabled:\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * <kbd>→</kbd>\n *\n * \t\t<$text a=\"true\">bar</$text>b{}az\n *\n * # Backward movement\n *\n * * When enabled:\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * <kbd>←</kbd>\n *\n * \t\t<$text a=\"true\">bar{}</$text>baz\n *\n * * When disabled:\n *\n * \t\t<$text a=\"true\">bar</$text>{}baz\n *\n * <kbd>←</kbd>\n *\n * \t\t<$text a=\"true\">ba{}r</$text>b{}az\n *\n * @param {Object} options Helper options.\n * @param {module:engine/view/view~View} options.view View controller instance.\n * @param {module:engine/model/model~Model} options.model Data model instance.\n * @param {module:utils/dom/emittermixin~Emitter} options.emitter The emitter to which this behavior should be added\n * (e.g. a plugin instance).\n * @param {String} options.attribute Attribute for which this behavior will be added.\n * @param {module:utils/locale~Locale} options.locale The {@link module:core/editor/editor~Editor#locale} instance.\n */\nexport default function bindTwoStepCaretToAttribute( { view, model, emitter, attribute, locale } ) {\n\tconst twoStepCaretHandler = new TwoStepCaretHandler( model, emitter, attribute );\n\tconst modelSelection = model.document.selection;\n\n\t// Listen to keyboard events and handle the caret movement according to the 2-step caret logic.\n\t//\n\t// Note: This listener has the \"high+1\" priority:\n\t// * \"high\" because of the filler logic implemented in the renderer which also engages on #keydown.\n\t// When the gravity is overridden the attributes of the (model) selection attributes are reset.\n\t// It may end up with the filler kicking in and breaking the selection.\n\t// * \"+1\" because we would like to avoid collisions with other features (like Widgets), which\n\t// take over the keydown events with the \"high\" priority. Two-step caret movement takes precedence\n\t// over Widgets in that matter.\n\t//\n\t// Find out more in https://github.com/ckeditor/ckeditor5-engine/issues/1301.\n\temitter.listenTo( view.document, 'keydown', ( evt, data ) => {\n\t\t// This implementation works only for collapsed selection.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// When user tries to expand the selection or jump over the whole word or to the beginning/end then\n\t\t// two-steps movement is not necessary.\n\t\tif ( data.shiftKey || data.altKey || data.ctrlKey ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst arrowRightPressed = data.keyCode == keyCodes.arrowright;\n\t\tconst arrowLeftPressed = data.keyCode == keyCodes.arrowleft;\n\n\t\t// When neither left or right arrow has been pressed then do noting.\n\t\tif ( !arrowRightPressed && !arrowLeftPressed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst position = modelSelection.getFirstPosition();\n\t\tconst contentDirection = locale.contentLanguageDirection;\n\t\tlet isMovementHandled;\n\n\t\tif ( ( contentDirection === 'ltr' && arrowRightPressed ) || ( contentDirection === 'rtl' && arrowLeftPressed ) ) {\n\t\t\tisMovementHandled = twoStepCaretHandler.handleForwardMovement( position, data );\n\t\t} else {\n\t\t\tisMovementHandled = twoStepCaretHandler.handleBackwardMovement( position, data );\n\t\t}\n\n\t\t// Stop the keydown event if the two-step caret movement handled it. Avoid collisions\n\t\t// with other features which may also take over the caret movement (e.g. Widget).\n\t\tif ( isMovementHandled ) {\n\t\t\tevt.stop();\n\t\t}\n\t}, { priority: priorities.get( 'high' ) + 1 } );\n}\n\n/**\n * This is a protected helper–class for {@link module:engine/utils/bindtwostepcarettoattribute}.\n * It handles the state of the 2-step caret movement for a single {@link module:engine/model/model~Model}\n * attribute upon the `keypress` in the {@link module:engine/view/view~View}.\n *\n * @protected\n */\nexport class TwoStepCaretHandler {\n\t/*\n\t * Creates two step handler instance.\n\t *\n\t * @param {module:engine/model/model~Model} model Data model instance.\n\t * @param {module:utils/dom/emittermixin~Emitter} emitter The emitter to which this behavior should be added\n\t * (e.g. a plugin instance).\n\t * @param {String} attribute Attribute for which the behavior will be added.\n\t */\n\tconstructor( model, emitter, attribute ) {\n\t\t/**\n\t\t * The model instance this class instance operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/model~Model#schema}\n\t\t */\n\t\tthis.model = model;\n\n\t\t/**\n\t\t * The Attribute this class instance operates on.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.attribute = attribute;\n\n\t\t/**\n\t\t * A reference to the document selection.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/selection~Selection}\n\t\t */\n\t\tthis._modelSelection = model.document.selection;\n\n\t\t/**\n\t\t * The current UID of the overridden gravity, as returned by\n\t\t * {@link module:engine/model/writer~Writer#overrideSelectionGravity}.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._overrideUid = null;\n\n\t\t/**\n\t\t * A flag indicating that the automatic gravity restoration for this attribute\n\t\t * should not happen upon the next\n\t\t * {@link module:engine/model/selection~Selection#event:change:range} event.\n\t\t *\n\t\t * @private\n\t\t * @member {String}\n\t\t */\n\t\tthis._isNextGravityRestorationSkipped = false;\n\n\t\t// The automatic gravity restoration logic.\n\t\temitter.listenTo( this._modelSelection, 'change:range', ( evt, data ) => {\n\t\t\t// Skipping the automatic restoration is needed if the selection should change\n\t\t\t// but the gravity must remain overridden afterwards. See the #handleBackwardMovement\n\t\t\t// to learn more.\n\t\t\tif ( this._isNextGravityRestorationSkipped ) {\n\t\t\t\tthis._isNextGravityRestorationSkipped = false;\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip automatic restore when the gravity is not overridden — simply, there's nothing to restore\n\t\t\t// at this moment.\n\t\t\tif ( !this._isGravityOverridden ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Skip automatic restore when the change is indirect AND the selection is at the attribute boundary.\n\t\t\t// It means that e.g. if the change was external (collaboration) and the user had their\n\t\t\t// selection around the link, its gravity should remain intact in this change:range event.\n\t\t\tif ( !data.directChange && isAtBoundary( this._modelSelection.getFirstPosition(), attribute ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis._restoreGravity();\n\t\t} );\n\t}\n\n\t/**\n\t * Updates the document selection and the view according to the two–step caret movement state\n\t * when moving **forwards**. Executed upon `keypress` in the {@link module:engine/view/view~View}.\n\t *\n\t * @param {module:engine/model/position~Position} position The model position at the moment of the key press.\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} data Data of the key press.\n\t * @returns {Boolean} `true` when the handler prevented caret movement\n\t */\n\thandleForwardMovement( position, data ) {\n\t\tconst attribute = this.attribute;\n\n\t\t// DON'T ENGAGE 2-SCM if gravity is already overridden. It means that we just entered\n\t\t//\n\t\t// \t\t<paragraph>foo<$text attribute>{}bar</$text>baz</paragraph>\n\t\t//\n\t\t// or left the attribute\n\t\t//\n\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>{}baz</paragraph>\n\t\t//\n\t\t// and the gravity will be restored automatically.\n\t\tif ( this._isGravityOverridden ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// DON'T ENGAGE 2-SCM when the selection is at the beginning of the block AND already has the\n\t\t// attribute:\n\t\t// * when the selection was initially set there using the mouse,\n\t\t// * when the editor has just started\n\t\t//\n\t\t//\t\t<paragraph><$text attribute>{}bar</$text>baz</paragraph>\n\t\t//\n\t\tif ( position.isAtStart && this._hasSelectionAttribute ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when about to leave one attribute value and enter another:\n\t\t//\n\t\t// \t\t<paragraph><$text attribute=\"1\">foo{}</$text><$text attribute=\"2\">bar</$text></paragraph>\n\t\t//\n\t\t// but DON'T when already in between of them (no attribute selection):\n\t\t//\n\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t//\n\t\tif ( isBetweenDifferentValues( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._removeSelectionAttribute();\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when entering an attribute:\n\t\t//\n\t\t// \t\t<paragraph>foo{}<$text attribute>bar</$text>baz</paragraph>\n\t\t//\n\t\tif ( isAtStartBoundary( position, attribute ) ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._overrideGravity();\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// ENGAGE 2-SCM when leaving an attribute:\n\t\t//\n\t\t//\t\t<paragraph>foo<$text attribute>bar{}</$text>baz</paragraph>\n\t\t//\n\t\tif ( isAtEndBoundary( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\tthis._preventCaretMovement( data );\n\t\t\tthis._overrideGravity();\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Updates the document selection and the view according to the two–step caret movement state\n\t * when moving **backwards**. Executed upon `keypress` in the {@link module:engine/view/view~View}.\n\t *\n\t * @param {module:engine/model/position~Position} position The model position at the moment of the key press.\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} data Data of the key press.\n\t * @returns {Boolean} `true` when the handler prevented caret movement\n\t */\n\thandleBackwardMovement( position, data ) {\n\t\tconst attribute = this.attribute;\n\n\t\t// When the gravity is already overridden...\n\t\tif ( this._isGravityOverridden ) {\n\t\t\t// ENGAGE 2-SCM & REMOVE SELECTION ATTRIBUTE\n\t\t\t// when about to leave one attribute value and enter another:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text><$text attribute=\"2\">{}bar</$text></paragraph>\n\t\t\t//\n\t\t\t// but DON'T when already in between of them (no attribute selection):\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( isBetweenDifferentValues( position, attribute ) && this._hasSelectionAttribute ) {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._restoreGravity();\n\t\t\t\tthis._removeSelectionAttribute();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// ENGAGE 2-SCM when at any boundary of the attribute:\n\t\t\t//\n\t\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>{}baz</paragraph>\n\t\t\t// \t\t<paragraph>foo<$text attribute>{}bar</$text>baz</paragraph>\n\t\t\t//\n\t\t\telse {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._restoreGravity();\n\n\t\t\t\t// REMOVE SELECTION ATRIBUTE at the beginning of the block.\n\t\t\t\t// It's like restoring gravity but towards a non-existent content when\n\t\t\t\t// the gravity is overridden:\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>{}bar</$text></paragraph>\n\t\t\t\t//\n\t\t\t\t// becomes:\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph>{}<$text attribute>bar</$text></paragraph>\n\t\t\t\t//\n\t\t\t\tif ( position.isAtStart ) {\n\t\t\t\t\tthis._removeSelectionAttribute();\n\t\t\t\t}\n\n\t\t\t\treturn true;\n\t\t\t}\n\t\t} else {\n\t\t\t// ENGAGE 2-SCM when between two different attribute values but selection has no attribute:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute=\"1\">foo</$text>{}<$text attribute=\"2\">bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( isBetweenDifferentValues( position, attribute ) && !this._hasSelectionAttribute ) {\n\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\tthis._setSelectionAttributeFromTheNodeBefore( position );\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\t// End of block boundary cases:\n\t\t\t//\n\t\t\t// \t\t<paragraph><$text attribute>bar{}</$text></paragraph>\n\t\t\t// \t\t<paragraph><$text attribute>bar</$text>{}</paragraph>\n\t\t\t//\n\t\t\tif ( position.isAtEnd && isAtEndBoundary( position, attribute ) ) {\n\t\t\t\t// DON'T ENGAGE 2-SCM if the selection has the attribute already.\n\t\t\t\t// This is a common selection if set using the mouse.\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>bar{}</$text></paragraph>\n\t\t\t\t//\n\t\t\t\tif ( this._hasSelectionAttribute ) {\n\t\t\t\t\t// DON'T ENGAGE 2-SCM if the attribute at the end of the block which has length == 1.\n\t\t\t\t\t// Make sure the selection will not the attribute after it moves backwards.\n\t\t\t\t\t//\n\t\t\t\t\t// \t\t<paragraph>foo<$text attribute>b{}</$text></paragraph>\n\t\t\t\t\t//\n\t\t\t\t\tif ( isStepAfterTheAttributeBoundary( position, attribute ) ) {\n\t\t\t\t\t\t// Skip the automatic gravity restore upon the next selection#change:range event.\n\t\t\t\t\t\t// If not skipped, it would automatically restore the gravity, which should remain\n\t\t\t\t\t\t// overridden.\n\t\t\t\t\t\tthis._skipNextAutomaticGravityRestoration();\n\t\t\t\t\t\tthis._overrideGravity();\n\n\t\t\t\t\t\t// Don't return \"true\" here because we didn't call _preventCaretMovement.\n\t\t\t\t\t\t// Returning here will destabilize the filler logic, which also listens to\n\t\t\t\t\t\t// keydown (and the event would be stopped).\n\t\t\t\t\t}\n\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\t// ENGAGE 2-SCM if the selection has no attribute. This may happen when the user\n\t\t\t\t// left the attribute using a FORWARD 2-SCM.\n\t\t\t\t//\n\t\t\t\t// \t\t<paragraph><$text attribute>bar</$text>{}</paragraph>\n\t\t\t\t//\n\t\t\t\telse {\n\t\t\t\t\tthis._preventCaretMovement( data );\n\t\t\t\t\tthis._setSelectionAttributeFromTheNodeBefore( position );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// REMOVE SELECTION ATRIBUTE when restoring gravity towards a non-existent content at the\n\t\t\t// beginning of the block.\n\t\t\t//\n\t\t\t// \t\t<paragraph>{}<$text attribute>bar</$text></paragraph>\n\t\t\t//\n\t\t\tif ( position.isAtStart ) {\n\t\t\t\tif ( this._hasSelectionAttribute ) {\n\t\t\t\t\tthis._removeSelectionAttribute();\n\t\t\t\t\tthis._preventCaretMovement( data );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// DON'T ENGAGE 2-SCM when about to enter of leave an attribute.\n\t\t\t// We need to check if the caret is a one position before the attribute boundary:\n\t\t\t//\n\t\t\t// \t\t<paragraph>foo<$text attribute>b{}ar</$text>baz</paragraph>\n\t\t\t// \t\t<paragraph>foo<$text attribute>bar</$text>b{}az</paragraph>\n\t\t\t//\n\t\t\tif ( isStepAfterTheAttributeBoundary( position, attribute ) ) {\n\t\t\t\t// Skip the automatic gravity restore upon the next selection#change:range event.\n\t\t\t\t// If not skipped, it would automatically restore the gravity, which should remain\n\t\t\t\t// overridden.\n\t\t\t\tthis._skipNextAutomaticGravityRestoration();\n\t\t\t\tthis._overrideGravity();\n\n\t\t\t\t// Don't return \"true\" here because we didn't call _preventCaretMovement.\n\t\t\t\t// Returning here will destabilize the filler logic, which also listens to\n\t\t\t\t// keydown (and the event would be stopped).\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * `true` when the gravity is overridden for the {@link #attribute}.\n\t *\n\t * @readonly\n\t * @private\n\t * @type {Boolean}\n\t */\n\tget _isGravityOverridden() {\n\t\treturn !!this._overrideUid;\n\t}\n\n\t/**\n\t * `true` when the {@link module:engine/model/selection~Selection} has the {@link #attribute}.\n\t *\n\t * @readonly\n\t * @private\n\t * @type {Boolean}\n\t */\n\tget _hasSelectionAttribute() {\n\t\treturn this._modelSelection.hasAttribute( this.attribute );\n\t}\n\n\t/**\n\t * Overrides the gravity using the {@link module:engine/model/writer~Writer model writer}\n\t * and stores the information about this fact in the {@link #_overrideUid}.\n\t *\n\t * A shorthand for {@link module:engine/model/writer~Writer#overrideSelectionGravity}.\n\t *\n\t * @private\n\t */\n\t_overrideGravity() {\n\t\tthis._overrideUid = this.model.change( writer => writer.overrideSelectionGravity() );\n\t}\n\n\t/**\n\t * Restores the gravity using the {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * A shorthand for {@link module:engine/model/writer~Writer#restoreSelectionGravity}.\n\t *\n\t * @private\n\t */\n\t_restoreGravity() {\n\t\tthis.model.change( writer => {\n\t\t\twriter.restoreSelectionGravity( this._overrideUid );\n\t\t\tthis._overrideUid = null;\n\t\t} );\n\t}\n\n\t/**\n\t * Prevents the caret movement in the view by calling `preventDefault` on the event data.\n\t *\n\t * @private\n\t */\n\t_preventCaretMovement( data ) {\n\t\tdata.preventDefault();\n\t}\n\n\t/**\n\t * Removes the {@link #attribute} from the selection using using the\n\t * {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * @private\n\t */\n\t_removeSelectionAttribute() {\n\t\tthis.model.change( writer => {\n\t\t\twriter.removeSelectionAttribute( this.attribute );\n\t\t} );\n\t}\n\n\t/**\n\t * Applies the {@link #attribute} to the current selection using using the\n\t * value from the node before the current position. Uses\n\t * the {@link module:engine/model/writer~Writer model writer}.\n\t *\n\t * @private\n\t * @param {module:engine/model/position~Position} position\n\t */\n\t_setSelectionAttributeFromTheNodeBefore( position ) {\n\t\tconst attribute = this.attribute;\n\n\t\tthis.model.change( writer => {\n\t\t\twriter.setSelectionAttribute( this.attribute, position.nodeBefore.getAttribute( attribute ) );\n\t\t} );\n\t}\n\n\t/**\n\t * Skips the next automatic selection gravity restoration upon the\n\t * {@link module:engine/model/selection~Selection#event:change:range} event.\n\t *\n\t * See {@link #_isNextGravityRestorationSkipped}.\n\t *\n\t * @private\n\t */\n\t_skipNextAutomaticGravityRestoration() {\n\t\tthis._isNextGravityRestorationSkipped = true;\n\t}\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\n// @returns {Boolean} `true` when position between the nodes sticks to the bound of text with given attribute.\nfunction isAtBoundary( position, attribute ) {\n\treturn isAtStartBoundary( position, attribute ) || isAtEndBoundary( position, attribute );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isAtStartBoundary( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\treturn isAttrAfter && ( !isAttrBefore || nodeBefore.getAttribute( attribute ) !== nodeAfter.getAttribute( attribute ) );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isAtEndBoundary( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\treturn isAttrBefore && ( !isAttrAfter || nodeBefore.getAttribute( attribute ) !== nodeAfter.getAttribute( attribute ) );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isBetweenDifferentValues( position, attribute ) {\n\tconst { nodeBefore, nodeAfter } = position;\n\tconst isAttrBefore = nodeBefore ? nodeBefore.hasAttribute( attribute ) : false;\n\tconst isAttrAfter = nodeAfter ? nodeAfter.hasAttribute( attribute ) : false;\n\n\tif ( !isAttrAfter || !isAttrBefore ) {\n\t\treturn;\n\t}\n\n\treturn nodeAfter.getAttribute( attribute ) !== nodeBefore.getAttribute( attribute );\n}\n\n// @param {module:engine/model/position~Position} position\n// @param {String} attribute\nfunction isStepAfterTheAttributeBoundary( position, attribute ) {\n\treturn isAtBoundary( position.getShiftedBy( -1 ), attribute );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/linkediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport LinkCommand from './linkcommand';\nimport UnlinkCommand from './unlinkcommand';\nimport { createLinkElement, ensureSafeUrl, getLocalizedDecorators, normalizeDecorators } from './utils';\nimport AutomaticDecorators from './utils/automaticdecorators';\nimport ManualDecorator from './utils/manualdecorator';\nimport bindTwoStepCaretToAttribute from '@ckeditor/ckeditor5-engine/src/utils/bindtwostepcarettoattribute';\nimport findLinkRange from './findlinkrange';\nimport '../theme/link.css';\n\nconst HIGHLIGHT_CLASS = 'ck-link_selected';\nconst DECORATOR_AUTOMATIC = 'automatic';\nconst DECORATOR_MANUAL = 'manual';\nconst EXTERNAL_LINKS_REGEXP = /^(https?:)?\\/\\//;\n\n/**\n * The link engine feature.\n *\n * It introduces the `linkHref=\"url\"` attribute in the model which renders to the view as a `<a href=\"url\">` element\n * as well as `'link'` and `'unlink'` commands.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class LinkEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'LinkEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\teditor.config.define( 'link', {\n\t\t\taddTargetToExternalLinks: false\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst locale = editor.locale;\n\n\t\t// Allow link attribute on all inline nodes.\n\t\teditor.model.schema.extend( '$text', { allowAttributes: 'linkHref' } );\n\n\t\teditor.conversion.for( 'dataDowncast' )\n\t\t\t.attributeToElement( { model: 'linkHref', view: createLinkElement } );\n\n\t\teditor.conversion.for( 'editingDowncast' )\n\t\t\t.attributeToElement( { model: 'linkHref', view: ( href, writer ) => {\n\t\t\t\treturn createLinkElement( ensureSafeUrl( href ), writer );\n\t\t\t} } );\n\n\t\teditor.conversion.for( 'upcast' )\n\t\t\t.elementToAttribute( {\n\t\t\t\tview: {\n\t\t\t\t\tname: 'a',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\thref: true\n\t\t\t\t\t}\n\t\t\t\t},\n\t\t\t\tmodel: {\n\t\t\t\t\tkey: 'linkHref',\n\t\t\t\t\tvalue: viewElement => viewElement.getAttribute( 'href' )\n\t\t\t\t}\n\t\t\t} );\n\n\t\t// Create linking commands.\n\t\teditor.commands.add( 'link', new LinkCommand( editor ) );\n\t\teditor.commands.add( 'unlink', new UnlinkCommand( editor ) );\n\n\t\tconst linkDecorators = getLocalizedDecorators( editor.t, normalizeDecorators( editor.config.get( 'link.decorators' ) ) );\n\n\t\tthis._enableAutomaticDecorators( linkDecorators.filter( item => item.mode === DECORATOR_AUTOMATIC ) );\n\t\tthis._enableManualDecorators( linkDecorators.filter( item => item.mode === DECORATOR_MANUAL ) );\n\n\t\t// Enable two-step caret movement for `linkHref` attribute.\n\t\tbindTwoStepCaretToAttribute( {\n\t\t\tview: editor.editing.view,\n\t\t\tmodel: editor.model,\n\t\t\temitter: this,\n\t\t\tattribute: 'linkHref',\n\t\t\tlocale\n\t\t} );\n\n\t\t// Setup highlight over selected link.\n\t\tthis._setupLinkHighlight();\n\t}\n\n\t/**\n\t * Processes an array of configured {@link module:link/link~LinkDecoratorAutomaticDefinition automatic decorators}\n\t * and registers a {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher downcast dispatcher}\n\t * for each one of them. Downcast dispatchers are obtained using the\n\t * {@link module:link/utils~AutomaticDecorators#getDispatcher} method.\n\t *\n\t * **Note**: This method also activates the automatic external link decorator if enabled with\n\t * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}.\n\t *\n\t * @private\n\t * @param {Array.<module:link/link~LinkDecoratorAutomaticDefinition>} automaticDecoratorDefinitions\n\t */\n\t_enableAutomaticDecorators( automaticDecoratorDefinitions ) {\n\t\tconst editor = this.editor;\n\t\tconst automaticDecorators = new AutomaticDecorators();\n\n\t\t// Adds a default decorator for external links.\n\t\tif ( editor.config.get( 'link.addTargetToExternalLinks' ) ) {\n\t\t\tautomaticDecorators.add( {\n\t\t\t\tid: 'linkIsExternal',\n\t\t\t\tmode: DECORATOR_AUTOMATIC,\n\t\t\t\tcallback: url => EXTERNAL_LINKS_REGEXP.test( url ),\n\t\t\t\tattributes: {\n\t\t\t\t\ttarget: '_blank',\n\t\t\t\t\trel: 'noopener noreferrer'\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\tautomaticDecorators.add( automaticDecoratorDefinitions );\n\n\t\tif ( automaticDecorators.length ) {\n\t\t\teditor.conversion.for( 'downcast' ).add( automaticDecorators.getDispatcher() );\n\t\t}\n\t}\n\n\t/**\n\t * Processes an array of configured {@link module:link/link~LinkDecoratorManualDefinition manual decorators},\n\t * transforms them into {@link module:link/utils~ManualDecorator} instances and stores them in the\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators} collection (a model for manual decorators state).\n\t *\n\t * Also registers an {@link module:engine/conversion/downcasthelpers~DowncastHelpers#attributeToElement attribute-to-element}\n\t * converter for each manual decorator and extends the {@link module:engine/model/schema~Schema model's schema}\n\t * with adequate model attributes.\n\t *\n\t * @private\n\t * @param {Array.<module:link/link~LinkDecoratorManualDefinition>} manualDecoratorDefinitions\n\t */\n\t_enableManualDecorators( manualDecoratorDefinitions ) {\n\t\tif ( !manualDecoratorDefinitions.length ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst editor = this.editor;\n\t\tconst command = editor.commands.get( 'link' );\n\t\tconst manualDecorators = command.manualDecorators;\n\n\t\tmanualDecoratorDefinitions.forEach( decorator => {\n\t\t\teditor.model.schema.extend( '$text', { allowAttributes: decorator.id } );\n\n\t\t\t// Keeps reference to manual decorator to decode its name to attributes during downcast.\n\t\t\tmanualDecorators.add( new ManualDecorator( decorator ) );\n\n\t\t\teditor.conversion.for( 'downcast' ).attributeToElement( {\n\t\t\t\tmodel: decorator.id,\n\t\t\t\tview: ( manualDecoratorName, writer ) => {\n\t\t\t\t\tif ( manualDecoratorName ) {\n\t\t\t\t\t\tconst attributes = manualDecorators.get( decorator.id ).attributes;\n\t\t\t\t\t\tconst element = writer.createAttributeElement( 'a', attributes, { priority: 5 } );\n\t\t\t\t\t\twriter.setCustomProperty( 'link', true, element );\n\n\t\t\t\t\t\treturn element;\n\t\t\t\t\t}\n\t\t\t\t} } );\n\n\t\t\teditor.conversion.for( 'upcast' ).elementToAttribute( {\n\t\t\t\tview: {\n\t\t\t\t\tname: 'a',\n\t\t\t\t\tattributes: manualDecorators.get( decorator.id ).attributes\n\t\t\t\t},\n\t\t\t\tmodel: {\n\t\t\t\t\tkey: decorator.id\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n\n\t/**\n\t * Adds a visual highlight style to a link in which the selection is anchored.\n\t * Together with two-step caret movement, they indicate that the user is typing inside the link.\n\t *\n\t * Highlight is turned on by adding the `.ck-link_selected` class to the link in the view:\n\t *\n\t * * The class is removed before the conversion has started, as callbacks added with the `'highest'` priority\n\t * to {@link module:engine/conversion/downcastdispatcher~DowncastDispatcher} events.\n\t * * The class is added in the view post fixer, after other changes in the model tree were converted to the view.\n\t *\n\t * This way, adding and removing the highlight does not interfere with conversion.\n\t *\n\t * @private\n\t */\n\t_setupLinkHighlight() {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst highlightedLinks = new Set();\n\n\t\t// Adding the class.\n\t\tview.document.registerPostFixer( writer => {\n\t\t\tconst selection = editor.model.document.selection;\n\t\t\tlet changed = false;\n\n\t\t\tif ( selection.hasAttribute( 'linkHref' ) ) {\n\t\t\t\tconst modelRange = findLinkRange( selection.getFirstPosition(), selection.getAttribute( 'linkHref' ), editor.model );\n\t\t\t\tconst viewRange = editor.editing.mapper.toViewRange( modelRange );\n\n\t\t\t\t// There might be multiple `a` elements in the `viewRange`, for example, when the `a` element is\n\t\t\t\t// broken by a UIElement.\n\t\t\t\tfor ( const item of viewRange.getItems() ) {\n\t\t\t\t\tif ( item.is( 'a' ) && !item.hasClass( HIGHLIGHT_CLASS ) ) {\n\t\t\t\t\t\twriter.addClass( HIGHLIGHT_CLASS, item );\n\t\t\t\t\t\thighlightedLinks.add( item );\n\t\t\t\t\t\tchanged = true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn changed;\n\t\t} );\n\n\t\t// Removing the class.\n\t\teditor.conversion.for( 'editingDowncast' ).add( dispatcher => {\n\t\t\t// Make sure the highlight is removed on every possible event, before conversion is started.\n\t\t\tdispatcher.on( 'insert', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'remove', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'attribute', removeHighlight, { priority: 'highest' } );\n\t\t\tdispatcher.on( 'selection', removeHighlight, { priority: 'highest' } );\n\n\t\t\tfunction removeHighlight() {\n\t\t\t\tview.change( writer => {\n\t\t\t\t\tfor ( const item of highlightedLinks.values() ) {\n\t\t\t\t\t\twriter.removeClass( HIGHLIGHT_CLASS, item );\n\t\t\t\t\t\thighlightedLinks.delete( item );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/notification/notification\n */\n\n/* globals window */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The Notification plugin.\n *\n * This plugin sends a few types of notifications: `success`, `info` and `warning`. The notifications need to be\n * handled and displayed by a plugin responsible for showing the UI of the notifications. Using this plugin for dispatching\n * notifications makes it possible to switch the notifications UI.\n *\n * Note that every unhandled and not stopped `warning` notification will be displayed as a system alert.\n * See {@link module:ui/notification/notification~Notification#showWarning}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Notification extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Notification';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\t// Each unhandled and not stopped `show:warning` event is displayed as a system alert.\n\t\tthis.on( 'show:warning', ( evt, data ) => {\n\t\t\twindow.alert( data.message ); // eslint-disable-line no-alert\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Shows a success notification.\n\t *\n\t * By default, it fires the {@link #event:show:success `show:success` event} with the given `data`. The event namespace can be extended\n\t * using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowSuccess( 'Image is uploaded.', {\n\t * \t\t\tnamespace: 'upload:image'\n\t * \t\t} );\n\t *\n\t * will fire the `show:success:upload:image` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowSuccess( 'Image is uploaded.', {\n\t *\t\t\ttitle: 'Image upload success'\n\t *\t\t} );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowSuccess( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'success',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Shows an information notification.\n\t *\n\t * By default, it fires the {@link #event:show:info `show:info` event} with the given `data`. The event namespace can be extended\n\t * using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowInfo( 'Editor is offline.', {\n\t * \t\t\tnamespace: 'editor:status'\n\t * \t\t} );\n\t *\n\t * will fire the `show:info:editor:status` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowInfo( 'Editor is offline.', {\n\t *\t\t\ttitle: 'Network information'\n\t *\t\t} );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowInfo( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'info',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Shows a warning notification.\n\t *\n\t * By default, it fires the {@link #event:show:warning `show:warning` event}\n\t * with the given `data`. The event namespace can be extended using the `data.namespace` option. For example:\n\t *\n\t * \t\tshowWarning( 'Image upload error.', {\n\t * \t\t\tnamespace: 'upload:image'\n\t * \t\t} );\n\t *\n\t * will fire the `show:warning:upload:image` event.\n\t *\n\t * You can provide the title of the notification:\n\t *\n\t *\t\tshowWarning( 'Image upload error.', {\n\t *\t\t\ttitle: 'Upload failed'\n\t *\t\t} );\n\t *\n\t * Note that each unhandled and not stopped `warning` notification will be displayed as a system alert.\n\t * The plugin responsible for displaying warnings should `stop()` the event to prevent displaying it as an alert:\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Do something with the data.\n\t *\n\t * \t\t\t// Stop this event to prevent displaying it as an alert.\n\t * \t\t\tevt.stop();\n\t * \t\t} );\n\t *\n\t * You can attach many listeners to the same event and `stop()` this event in a listener with a low priority:\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Show the warning in the UI, but do not stop it.\n\t * \t\t} );\n\t *\n\t * \t\tnotifications.on( 'show:warning', ( evt, data ) => {\n\t * \t\t\t// Log the warning to some error tracker.\n\t *\n\t * \t\t\t// Stop this event to prevent displaying it as an alert.\n\t * \t\t\tevt.stop();\n\t * \t\t}, { priority: 'low' } );\n\t *\n\t * @param {String} message The content of the notification.\n\t * @param {Object} [data={}] Additional data.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title] The title of the notification.\n\t */\n\tshowWarning( message, data = {} ) {\n\t\tthis._showNotification( {\n\t\t\tmessage,\n\t\t\ttype: 'warning',\n\t\t\tnamespace: data.namespace,\n\t\t\ttitle: data.title\n\t\t} );\n\t}\n\n\t/**\n\t * Fires the `show` event with the specified type, namespace and message.\n\t *\n\t * @private\n\t * @param {Object} data The message data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {'success'|'info'|'warning'} data.type The type of the message.\n\t * @param {String} [data.namespace] Additional event namespace.\n\t * @param {String} [data.title=''] The title of the notification.\n\t */\n\t_showNotification( data ) {\n\t\tconst event = `show:${ data.type }` + ( data.namespace ? `:${ data.namespace }` : '' );\n\n\t\tthis.fire( event, {\n\t\t\tmessage: data.message,\n\t\t\ttype: data.type,\n\t\t\ttitle: data.title || ''\n\t\t} );\n\t}\n\n\t/**\n\t * Fired when one of the `showSuccess()`, `showInfo()`, `showWarning()` methods is called.\n\t *\n\t * @event show\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'success'|'info'|'warning'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showSuccess()` method is called.\n\t *\n\t * @event show:success\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'success'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showInfo()` method is called.\n\t *\n\t * @event show:info\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'info'} data.type The type of the notification.\n\t */\n\n\t/**\n\t * Fired when the `showWarning()` method is called.\n\t *\n\t * When this event is not handled or stopped by `event.stop()`, the `data.message` of this event will\n\t * be automatically displayed as a system alert.\n\t *\n\t * @event show:warning\n\t * @param {Object} data The notification data.\n\t * @param {String} data.message The content of the notification.\n\t * @param {String} data.title The title of the notification.\n\t * @param {'warning'} data.type The type of the notification.\n\t */\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/* global window */\n/**\n * @module ckfinder/ckfindercommand\n */\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n/**\n * The CKFinder command. It is used by the {@link module:ckfinder/ckfinderediting~CKFinderEditing CKFinder editing feature}\n * to open the CKFinder file manager to insert an image or a link to a file into the editor content.\n *\n *\t\teditor.execute( 'ckfinder' );\n *\n * **Note:** This command uses other features to perform tasks:\n * - To insert images the {@link module:image/image/imageinsertcommand~ImageInsertCommand 'imageInsert'} command\n * from the {@link module:image/image~Image Image feature}.\n * - To insert links to files the {@link module:link/linkcommand~LinkCommand 'link'} command\n * from the {@link module:link/link~Link Link feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class CKFinderCommand extends Command {\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n // Remove default document listener to lower its priority.\n this.stopListening(this.editor.model.document, 'change');\n // Lower this command listener priority to be sure that refresh() will be called after link & image refresh.\n this.listenTo(this.editor.model.document, 'change', () => this.refresh(), { priority: 'low' });\n }\n /**\n\t * @inheritDoc\n\t */\n refresh() {\n const imageCommand = this.editor.commands.get('imageInsert');\n const linkCommand = this.editor.commands.get('link');\n // The CKFinder command is enabled when one of image or link command is enabled.\n this.isEnabled = imageCommand.isEnabled || linkCommand.isEnabled;\n }\n /**\n\t * @inheritDoc\n\t */\n execute() {\n const editor = this.editor;\n const openerMethod = this.editor.config.get('ckfinder.openerMethod') || 'modal';\n if (openerMethod != 'popup' && openerMethod != 'modal') {\n throw new CKEditorError('ckfinder-unknown-openerMethod: The openerMethod config option must by \"popup\" or \"modal\".', editor);\n }\n const options = this.editor.config.get('ckfinder.options') || {};\n options.chooseFiles = true;\n // Cache the user-defined onInit method\n const originalOnInit = options.onInit;\n // Pass the lang code to the CKFinder if not defined by user.\n if (!options.language) {\n options.language = editor.locale.uiLanguage;\n }\n // The onInit method allows to extend CKFinder's behavior. It is used to attach event listeners to file choosing related events.\n options.onInit = finder => {\n // Call original options.onInit if it was defined by user.\n if (originalOnInit) {\n originalOnInit(finder);\n }\n finder.on('files:choose', evt => {\n const files = evt.data.files.toArray();\n // Insert links\n const links = files.filter(file => !file.isImage());\n const images = files.filter(file => file.isImage());\n for (const linkFile of links) {\n editor.execute('link', linkFile.getUrl());\n }\n const imagesUrls = [];\n for (const image of images) {\n const url = image.getUrl();\n imagesUrls.push(url ? url : finder.request('file:getProxyUrl', { file: image }));\n }\n if (imagesUrls.length) {\n insertImages(editor, imagesUrls);\n }\n });\n finder.on('file:choose:resizedImage', evt => {\n const resizedUrl = evt.data.resizedUrl;\n if (!resizedUrl) {\n const notification = editor.plugins.get('Notification');\n const t = editor.locale.t;\n notification.showWarning(t('at'), {\n title: t('au'),\n namespace: 'ckfinder'\n });\n return;\n }\n insertImages(editor, [resizedUrl]);\n });\n };\n window.CKFinder[openerMethod](options);\n }\n}\nfunction insertImages(editor, urls) {\n const imageCommand = editor.commands.get('imageInsert');\n // Check if inserting an image is actually possible - it might be possible to only insert a link.\n if (!imageCommand.isEnabled) {\n const notification = editor.plugins.get('Notification');\n const t = editor.locale.t;\n notification.showWarning(t('av'), {\n title: t('aw'),\n namespace: 'ckfinder'\n });\n return;\n }\n editor.execute('imageInsert', { source: urls });\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ckfinder/ckfinderediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageEditing from '@ckeditor/ckeditor5-image/src/image/imageediting';\nimport LinkEditing from '@ckeditor/ckeditor5-link/src/linkediting';\nimport Notification from '@ckeditor/ckeditor5-ui/src/notification/notification';\n\nimport CKFinderCommand from './ckfindercommand';\n\n/**\n * The CKFinder editing feature. It introduces the {@link module:ckfinder/ckfindercommand~CKFinderCommand CKFinder command}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinderEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CKFinderEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Notification, ImageEditing, LinkEditing ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\teditor.commands.add( 'ckfinder', new CKFinderCommand( editor ) );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/uploadgateway/fileuploader\n */\n\n/* globals XMLHttpRequest, FormData, Blob, atob */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst BASE64_HEADER_REG_EXP = /^data:(\\S*?);base64,/;\n\n/**\n * FileUploader class used to upload single file.\n */\nexport default class FileUploader {\n\t/**\n\t * Creates `FileUploader` instance.\n\t *\n\t * @param {Blob|String} fileOrData A blob object or a data string encoded with Base64.\n\t * @param {module:cloud-services-core/token~Token} token Token used for authentication.\n\t * @param {String} apiAddress API address.\n\t */\n\tconstructor( fileOrData, token, apiAddress ) {\n\t\tif ( !fileOrData ) {\n\t\t\t/**\n\t\t\t * File must be provided as the first argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-file\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-file: File must be provided as the first argument', null );\n\t\t}\n\n\t\tif ( !token ) {\n\t\t\t/**\n\t\t\t * Token must be provided as the second argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-token\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-token: Token must be provided as the second argument.', null );\n\t\t}\n\n\t\tif ( !apiAddress ) {\n\t\t\t/**\n\t\t\t * Api address must be provided as the third argument.\n\t\t\t *\n\t\t\t * @error fileuploader-missing-api-address\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'fileuploader-missing-api-address: Api address must be provided as the third argument.', null );\n\t\t}\n\n\t\t/**\n\t\t * A file that is being uploaded.\n\t\t *\n\t\t * @type {Blob}\n\t\t */\n\t\tthis.file = _isBase64( fileOrData ) ? _base64ToBlob( fileOrData ) : fileOrData;\n\n\t\t/**\n\t\t * CKEditor Cloud Services access token.\n\t\t *\n\t\t * @type {module:cloud-services-core/token~Token}\n\t\t * @private\n\t\t */\n\t\tthis._token = token;\n\n\t\t/**\n\t\t * CKEditor Cloud Services API address.\n\t\t *\n\t\t * @type {String}\n\t\t * @private\n\t\t */\n\t\tthis._apiAddress = apiAddress;\n\t}\n\n\t/**\n\t * Registers callback on `progress` event.\n\t *\n\t * @chainable\n\t * @param {Function} callback\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader}\n\t */\n\tonProgress( callback ) {\n\t\tthis.on( 'progress', ( event, data ) => callback( data ) );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Registers callback on `error` event. Event is called once when error occurs.\n\t *\n\t * @chainable\n\t * @param {Function} callback\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader}\n\t */\n\tonError( callback ) {\n\t\tthis.once( 'error', ( event, data ) => callback( data ) );\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Aborts upload process.\n\t */\n\tabort() {\n\t\tthis.xhr.abort();\n\t}\n\n\t/**\n\t * Sends XHR request to API.\n\t *\n\t * @chainable\n\t * @returns {Promise.<Object>}\n\t */\n\tsend() {\n\t\tthis._prepareRequest();\n\t\tthis._attachXHRListeners();\n\n\t\treturn this._sendRequest();\n\t}\n\n\t/**\n\t * Prepares XHR request.\n\t *\n\t * @private\n\t */\n\t_prepareRequest() {\n\t\tconst xhr = new XMLHttpRequest();\n\n\t\txhr.open( 'POST', this._apiAddress );\n\t\txhr.setRequestHeader( 'Authorization', this._token.value );\n\t\txhr.responseType = 'json';\n\n\t\tthis.xhr = xhr;\n\t}\n\n\t/**\n\t * Attaches listeners to the XHR.\n\t *\n\t * @private\n\t */\n\t_attachXHRListeners() {\n\t\tconst that = this;\n\t\tconst xhr = this.xhr;\n\n\t\txhr.addEventListener( 'error', onError( 'Network Error' ) );\n\t\txhr.addEventListener( 'abort', onError( 'Abort' ) );\n\n\t\t/* istanbul ignore else */\n\t\tif ( xhr.upload ) {\n\t\t\txhr.upload.addEventListener( 'progress', event => {\n\t\t\t\tif ( event.lengthComputable ) {\n\t\t\t\t\tthis.fire( 'progress', {\n\t\t\t\t\t\ttotal: event.total,\n\t\t\t\t\t\tuploaded: event.loaded\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\txhr.addEventListener( 'load', () => {\n\t\t\tconst statusCode = xhr.status;\n\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\treturn this.fire( 'error', xhrResponse.message || xhrResponse.error );\n\t\t\t}\n\t\t} );\n\n\t\tfunction onError( message ) {\n\t\t\treturn () => that.fire( 'error', message );\n\t\t}\n\t}\n\n\t/**\n\t * Sends XHR request.\n\t *\n\t * @private\n\t */\n\t_sendRequest() {\n\t\tconst formData = new FormData();\n\t\tconst xhr = this.xhr;\n\n\t\tformData.append( 'file', this.file );\n\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\txhr.addEventListener( 'load', () => {\n\t\t\t\tconst statusCode = xhr.status;\n\t\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\t\tif ( xhrResponse.message ) {\n\t\t\t\t\t\t/**\n\t\t\t\t\t\t * Uploading file failed.\n\t\t\t\t\t\t *\n\t\t\t\t\t\t * @error fileuploader-uploading-data-failed\n\t\t\t\t\t\t */\n\t\t\t\t\t\treturn reject( new CKEditorError(\n\t\t\t\t\t\t\t'fileuploader-uploading-data-failed: Uploading file failed.',\n\t\t\t\t\t\t\tthis,\n\t\t\t\t\t\t\t{ message: xhrResponse.message }\n\t\t\t\t\t\t) );\n\t\t\t\t\t}\n\n\t\t\t\t\treturn reject( xhrResponse.error );\n\t\t\t\t}\n\n\t\t\t\treturn resolve( xhrResponse );\n\t\t\t} );\n\n\t\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n\t\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n\n\t\t\txhr.send( formData );\n\t\t} );\n\t}\n\n\t/**\n\t * Fired when error occurs.\n\t *\n\t * @event error\n\t * @param {String} error Error message\n\t */\n\n\t/**\n\t * Fired on upload progress.\n\t *\n\t * @event progress\n\t * @param {Object} status Total and uploaded status\n\t */\n}\n\nmix( FileUploader, EmitterMixin );\n\n/**\n * Transforms Base64 string data into file.\n *\n * @param {String} base64 String data.\n * @param {Number} [sliceSize=512]\n * @returns {Blob}\n * @private\n */\nfunction _base64ToBlob( base64, sliceSize = 512 ) {\n\ttry {\n\t\tconst contentType = base64.match( BASE64_HEADER_REG_EXP )[ 1 ];\n\t\tconst base64Data = atob( base64.replace( BASE64_HEADER_REG_EXP, '' ) );\n\n\t\tconst byteArrays = [];\n\n\t\tfor ( let offset = 0; offset < base64Data.length; offset += sliceSize ) {\n\t\t\tconst slice = base64Data.slice( offset, offset + sliceSize );\n\t\t\tconst byteNumbers = new Array( slice.length );\n\n\t\t\tfor ( let i = 0; i < slice.length; i++ ) {\n\t\t\t\tbyteNumbers[ i ] = slice.charCodeAt( i );\n\t\t\t}\n\n\t\t\tbyteArrays.push( new Uint8Array( byteNumbers ) );\n\t\t}\n\n\t\treturn new Blob( byteArrays, { type: contentType } );\n\t} catch ( error ) {\n\t\t/**\n\t\t * Problem with decoding Base64 image data.\n\t\t *\n\t\t * @error fileuploader-decoding-image-data-error\n\t\t */\n\t\tthrow new CKEditorError( 'fileuploader-decoding-image-data-error: Problem with decoding Base64 image data.', null );\n\t}\n}\n\n/**\n * Checks that string is Base64.\n *\n * @param {String} string\n * @returns {Boolean}\n * @private\n */\nfunction _isBase64( string ) {\n\tif ( typeof string !== 'string' ) {\n\t\treturn false;\n\t}\n\n\tconst match = string.match( BASE64_HEADER_REG_EXP );\n\treturn !!( match && match.length );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/token\n */\n\n/* globals XMLHttpRequest, setInterval, clearInterval */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst DEFAULT_OPTIONS = { refreshInterval: 3600000, autoRefresh: true };\n\n/**\n * Class representing the token used for communication with CKEditor Cloud Services.\n * Value of the token is retrieving from the specified URL and is refreshed every 1 hour by default.\n *\n * @mixes ObservableMixin\n */\nclass Token {\n\t/**\n\t * Creates `Token` instance.\n\t * Method `init` should be called after using the constructor or use `create` method instead.\n\t *\n\t * @param {String|Function} tokenUrlOrRefreshToken Endpoint address to download the token or a callback that provides the token. If the\n\t * value is a function it has to match the {@link module:cloud-services-core/token~refreshToken} interface.\n\t * @param {Object} options\n\t * @param {String} [options.initValue] Initial value of the token.\n\t * @param {Number} [options.refreshInterval=3600000] Delay between refreshes. Default 1 hour.\n\t * @param {Boolean} [options.autoRefresh=true] Specifies whether to start the refresh automatically.\n\t */\n\tconstructor( tokenUrlOrRefreshToken, options = DEFAULT_OPTIONS ) {\n\t\tif ( !tokenUrlOrRefreshToken ) {\n\t\t\t/**\n\t\t\t * A `tokenUrl` must be provided as the first constructor argument.\n\t\t\t *\n\t\t\t * @error token-missing-token-url\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'token-missing-token-url: A `tokenUrl` must be provided as the first constructor argument.',\n\t\t\t\tthis\n\t\t\t);\n\t\t}\n\n\t\t/**\n\t\t * Value of the token.\n\t\t * The value of the token is null if `initValue` is not provided or `init` method was not called.\n\t\t * `create` method creates token with initialized value from url.\n\t\t *\n\t\t * @name value\n\t\t * @member {String} #value\n\t\t * @observable\n\t\t * @readonly\n\t\t */\n\t\tthis.set( 'value', options.initValue );\n\n\t\t/**\n\t\t * Base refreshing function.\n\t\t *\n\t\t * @private\n\t\t * @member {String|Function} #_refresh\n\t\t */\n\t\tif ( typeof tokenUrlOrRefreshToken === 'function' ) {\n\t\t\tthis._refresh = tokenUrlOrRefreshToken;\n\t\t} else {\n\t\t\tthis._refresh = () => defaultRefreshToken( tokenUrlOrRefreshToken );\n\t\t}\n\n\t\t/**\n\t\t * @type {Object}\n\t\t * @private\n\t\t */\n\t\tthis._options = Object.assign( {}, DEFAULT_OPTIONS, options );\n\t}\n\n\t/**\n\t * Initializes the token.\n\t *\n\t * @returns {Promise.<module:cloud-services-core/token~Token>}\n\t */\n\tinit() {\n\t\treturn new Promise( ( resolve, reject ) => {\n\t\t\tif ( this._options.autoRefresh ) {\n\t\t\t\tthis._startRefreshing();\n\t\t\t}\n\n\t\t\tif ( !this.value ) {\n\t\t\t\tthis._refreshToken()\n\t\t\t\t\t.then( resolve )\n\t\t\t\t\t.catch( reject );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tresolve( this );\n\t\t} );\n\t}\n\n\t/**\n\t * Refresh token method. Useful in a method form as it can be override in tests.\n\t *\n\t * @protected\n\t */\n\t_refreshToken() {\n\t\treturn this._refresh()\n\t\t\t.then( value => this.set( 'value', value ) )\n\t\t\t.then( () => this );\n\t}\n\n\t/**\n\t * Destroys token instance. Stops refreshing.\n\t */\n\tdestroy() {\n\t\tthis._stopRefreshing();\n\t}\n\n\t/**\n\t * Starts value refreshing every `refreshInterval` time.\n\t *\n\t * @protected\n\t */\n\t_startRefreshing() {\n\t\tthis._refreshInterval = setInterval( () => this._refreshToken(), this._options.refreshInterval );\n\t}\n\n\t/**\n\t * Stops value refreshing.\n\t *\n\t * @protected\n\t */\n\t_stopRefreshing() {\n\t\tclearInterval( this._refreshInterval );\n\t}\n\n\t/**\n\t * Creates a initialized {@link module:cloud-services-core/token~Token} instance.\n\t *\n\t * @param {String|Function} tokenUrlOrRefreshToken Endpoint address to download the token or a callback that provides the token. If the\n\t * value is a function it has to match the {@link module:cloud-services-core/token~refreshToken} interface.\n\t * @param {Object} options\n\t * @param {String} [options.initValue] Initial value of the token.\n\t * @param {Number} [options.refreshInterval=3600000] Delay between refreshes. Default 1 hour.\n\t * @param {Boolean} [options.autoRefresh=true] Specifies whether to start the refresh automatically.\n\t * @returns {Promise.<module:cloud-services-core/token~Token>}\n\t */\n\tstatic create( tokenUrlOrRefreshToken, options = DEFAULT_OPTIONS ) {\n\t\tconst token = new Token( tokenUrlOrRefreshToken, options );\n\n\t\treturn token.init();\n\t}\n}\n\nmix( Token, ObservableMixin );\n\n/**\n * This function is called in a defined interval by the {@link ~Token} class.\n * It should return a promise, which resolves with the new token value.\n * If any error occurs it should return a rejected promise with an error message.\n *\n * @function refreshToken\n * @returns {Promise.<String>}\n */\n\n/**\n * @private\n * @param {String} tokenUrl\n */\nfunction defaultRefreshToken( tokenUrl ) {\n\treturn new Promise( ( resolve, reject ) => {\n\t\tconst xhr = new XMLHttpRequest();\n\n\t\txhr.open( 'GET', tokenUrl );\n\n\t\txhr.addEventListener( 'load', () => {\n\t\t\tconst statusCode = xhr.status;\n\t\t\tconst xhrResponse = xhr.response;\n\n\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n\t\t\t\t/**\n\t\t\t\t * Cannot download new token from the provided url.\n\t\t\t\t *\n\t\t\t\t * @error token-cannot-download-new-token\n\t\t\t\t */\n\t\t\t\treturn reject(\n\t\t\t\t\tnew CKEditorError( 'token-cannot-download-new-token: Cannot download new token from the provided url.', null )\n\t\t\t\t);\n\t\t\t}\n\n\t\t\treturn resolve( xhrResponse );\n\t\t} );\n\n\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n\n\t\txhr.send();\n\t} );\n}\n\nexport default Token;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services/cloudservices\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Token from '@ckeditor/ckeditor-cloud-services-core/src/token/token';\n\n/**\n * Plugin introducing integration between CKEditor 5 and CKEditor Cloud Services .\n *\n * It initializes the token provider based on\n * the {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudService`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CloudServices extends Plugin {\n\t/**\n\t * @inheritdoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CloudServices';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst config = editor.config;\n\n\t\tconst options = config.get( 'cloudServices' ) || {};\n\n\t\tfor ( const optionName in options ) {\n\t\t\tthis[ optionName ] = options[ optionName ];\n\t\t}\n\n\t\t/**\n\t\t * The authentication token URL for CKEditor Cloud Services or a callback to the token value promise. See the\n\t\t * {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} for more details.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String|Function|undefined} #tokenUrl\n\t\t */\n\n\t\t/**\n\t\t * The URL to which the files should be uploaded.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #uploadUrl\n\t\t */\n\n\t\t/**\n\t\t * Other plugins use this token for the authorization process. It handles token requesting and refreshing.\n\t\t * Its value is `null` when {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} is not provided.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Object|null} #token\n\t\t */\n\n\t\tif ( !this.tokenUrl ) {\n\t\t\tthis.token = null;\n\n\t\t\treturn;\n\t\t}\n\n\t\tthis.token = new CloudServices.Token( this.tokenUrl );\n\n\t\treturn this.token.init();\n\t}\n}\n\nCloudServices.Token = Token;\n\n/**\n * The configuration of CKEditor Cloud Services. Introduced by the {@link module:cloud-services/cloudservices~CloudServices} plugin.\n *\n * Read more in {@link module:cloud-services/cloudservices~CloudServicesConfig}.\n *\n * @member {module:cloud-services/cloudservices~CloudServicesConfig} module:core/editor/editorconfig~EditorConfig#cloudServices\n */\n\n/**\n * The configuration for all plugins using CKEditor Cloud Services.\n *\n *\t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: 'https://example.com/cs-token-endpoint',\n *\t\t\t\t\tuploadUrl: 'https://your-organization-id.cke-cs.com/easyimage/upload/'\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface CloudServicesConfig\n */\n\n/**\n * A token URL or a token request function.\n *\n * As a string, it should be a URL to the security token endpoint in your application. The role of this endpoint is to securely authorize\n * the end users of your application to use [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services) only\n * if they should have access e.g. to upload files with {@glink @cs guides/easy-image/quick-start Easy Image} or to use the\n * {@glink @cs guides/collaboration/quick-start Collaboration} service.\n *\n *\t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: 'https://example.com/cs-token-endpoint',\n *\t\t\t\t\t...\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * As a function, it should provide a promise to the token value, so you can highly customize the token and provide your token URL endpoint.\n * By using this approach you can set your own headers for the request.\n *\n * \t\tClassicEditor\n *\t\t\t.create( document.querySelector( '#editor' ), {\n *\t\t\t\tcloudServices: {\n *\t\t\t\t\ttokenUrl: () => new Promise( ( resolve, reject ) => {\n *\t\t\t\t\t\tconst xhr = new XMLHttpRequest();\n *\n *\t\t\t\t\t\txhr.open( 'GET', 'https://example.com/cs-token-endpoint' );\n *\n *\t\t\t\t\t\txhr.addEventListener( 'load', () => {\n *\t\t\t\t\t\t\tconst statusCode = xhr.status;\n *\t\t\t\t\t\t\tconst xhrResponse = xhr.response;\n *\n *\t\t\t\t\t\t\tif ( statusCode < 200 || statusCode > 299 ) {\n *\t\t\t\t\t\t\t\treturn reject( new Error( 'Cannot download new token!' ) );\n *\t\t\t\t\t\t\t}\n *\n *\t\t\t\t\t\t\treturn resolve( xhrResponse );\n *\t\t\t\t\t\t} );\n *\n *\t\t\t\t\t\txhr.addEventListener( 'error', () => reject( new Error( 'Network Error' ) ) );\n *\t\t\t\t\t\txhr.addEventListener( 'abort', () => reject( new Error( 'Abort' ) ) );\n *\n *\t\t\t\t\t\txhr.setRequestHeader( customHeader, customValue );\n *\n *\t\t\t\t\t\txhr.send();\n *\t\t\t\t\t} ),\n *\t\t\t\t\t...\n *\t\t\t\t}\n *\t\t\t} )\n *\n * You can find more information about token endpoints in the\n * {@glink @cs guides/easy-image/quick-start#create-token-endpoint Cloud Services - Quick start}\n * and {@glink @cs guides/security/token-endpoint Cloud Services - Token endpoint} documentation.\n *\n * Without a properly working token endpoint (token URL) CKEditor plugins will not be able to connect to CKEditor Cloud Services.\n *\n * @member {String|Function} module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl\n */\n\n/**\n * The endpoint URL for [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services) uploads.\n * This option must be set for Easy Image to work correctly.\n *\n * The upload URL is unique for each customer and can be found in the\n * [CKEditor Ecosystem customer dashboard](https://dashboard.ckeditor.com) after subscribing to the Easy Image service.\n * To learn how to start using Easy Image, check the {@glink @cs guides/easy-image/quick-start Easy Image - Quick start} documentation.\n *\n * Note: Make sure to also set the {@link module:cloud-services/cloudservices~CloudServicesConfig#tokenUrl} configuration option.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#uploadUrl\n */\n\n/**\n * The URL for web socket communication, used by the `RealTimeCollaborativeEditing` plugin. Every customer (organization in the CKEditor\n * Ecosystem dashboard) has their own, unique URLs to communicate with CKEditor Cloud Services. The URL can be found in the\n * CKEditor Ecosystem customer dashboard.\n *\n * Note: Unlike most plugins, `RealTimeCollaborativeEditing` is not included in any CKEditor 5 build and needs to be installed manually.\n * Check [Collaboration overview](https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/overview.html) for more details.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#webSocketUrl\n */\n\n/**\n * Document ID, used by the `RealTimeCollaborativeEditing` plugin. All editor instances created with the same document ID will collaborate.\n * It means that each document needs a different document ID if you do not want to start collaboration between these documents.\n * The ID is usually a primary key of the document in the database, but you are free to provide whatever identifier fits your scenario.\n *\n * Note: Unlike most plugins, `RealTimeCollaborativeEditing` is not included in any CKEditor 5 build and needs to be installed manually.\n * Check [Collaboration overview](https://ckeditor.com/docs/ckeditor5/latest/features/collaboration/overview.html) for more details.\n *\n * @member {String} module:cloud-services/cloudservices~CloudServicesConfig#documentId\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n* @module easy-image/cloudservicesuploadadapter\n*/\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport UploadGateway from '@ckeditor/ckeditor-cloud-services-core/src/uploadgateway/uploadgateway';\nimport CloudServices from '@ckeditor/ckeditor5-cloud-services/src/cloudservices';\n\n/**\n * A plugin that enables upload to [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/).\n *\n * It is mainly used by the {@link module:easy-image/easyimage~EasyImage} feature.\n *\n * After enabling this adapter you need to configure the CKEditor Cloud Services integration through\n * {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudServices`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CloudServicesUploadAdapter extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ FileRepository, CloudServices ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\tconst cloudServices = editor.plugins.get( CloudServices );\n\n\t\tconst token = cloudServices.token;\n\t\tconst uploadUrl = cloudServices.uploadUrl;\n\n\t\tif ( !token ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis._uploadGateway = new CloudServicesUploadAdapter._UploadGateway( token, uploadUrl );\n\n\t\teditor.plugins.get( FileRepository ).createUploadAdapter = loader => {\n\t\t\treturn new Adapter( this._uploadGateway, loader );\n\t\t};\n\t}\n}\n\n/**\n * @private\n */\nclass Adapter {\n\tconstructor( uploadGateway, loader ) {\n\t\tthis.uploadGateway = uploadGateway;\n\n\t\tthis.loader = loader;\n\t}\n\n\tupload() {\n\t\treturn this.loader.file.then( file => {\n\t\t\tthis.fileUploader = this.uploadGateway.upload( file );\n\n\t\t\tthis.fileUploader.on( 'progress', ( evt, data ) => {\n\t\t\t\tthis.loader.uploadTotal = data.total;\n\t\t\t\tthis.loader.uploaded = data.uploaded;\n\t\t\t} );\n\n\t\t\treturn this.fileUploader.send();\n\t\t} );\n\t}\n\n\tabort() {\n\t\tthis.fileUploader.abort();\n\t}\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\nCloudServicesUploadAdapter._UploadGateway = UploadGateway;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module cloud-services-core/uploadgateway/uploadgateway\n */\n\nimport FileUploader from './fileuploader';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * UploadGateway abstracts file uploads to CKEditor Cloud Services.\n */\nexport default class UploadGateway {\n\t/**\n\t * Creates `UploadGateway` instance.\n\t *\n\t * @param {module:cloud-services-core/token~Token} token Token used for authentication.\n\t * @param {String} apiAddress API address.\n\t */\n\tconstructor( token, apiAddress ) {\n\t\tif ( !token ) {\n\t\t\t/**\n\t\t\t * Token must be provided.\n\t\t\t *\n\t\t\t * @error uploadgateway-missing-token\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'uploadgateway-missing-token: Token must be provided.', null );\n\t\t}\n\n\t\tif ( !apiAddress ) {\n\t\t\t/**\n\t\t\t * Api address must be provided.\n\t\t\t *\n\t\t\t * @error uploadgateway-missing-api-address\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'uploadgateway-missing-api-address: Api address must be provided.', null );\n\t\t}\n\n\t\t/**\n\t\t * CKEditor Cloud Services access token.\n\t\t *\n\t\t * @type {module:cloud-services-core/token~Token}\n\t\t * @private\n\t\t */\n\t\tthis._token = token;\n\n\t\t/**\n\t\t * CKEditor Cloud Services API address.\n\t\t *\n\t\t * @type {String}\n\t\t * @private\n\t\t */\n\t\tthis._apiAddress = apiAddress;\n\t}\n\n\t/**\n\t * Creates a {@link module:cloud-services-core/uploadgateway/fileuploader~FileUploader} instance that wraps\n\t * file upload process. The file is being sent at a time when the\n\t * {@link module:cloud-services-core/uploadgateway/fileuploader~FileUploader#send} method is called.\n\t *\n\t * const token = await Token.create( 'https://token-endpoint' );\n\t * new UploadGateway( token, 'https://example.org' )\n\t * .upload( 'FILE' )\n\t * .onProgress( ( data ) => console.log( data ) )\n\t * .send()\n\t * .then( ( response ) => console.log( response ) );\n\t *\n\t * @param {Blob|String} fileOrData A blob object or a data string encoded with Base64.\n\t * @returns {module:cloud-services-core/uploadgateway/fileuploader~FileUploader} Returns `FileUploader` instance.\n\t */\n\tupload( fileOrData ) {\n\t\treturn new FileUploader( fileOrData, this._token, this._apiAddress );\n\t}\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mouseobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Mouse events observer.\n *\n * Note that this observer is not available by default. To make it available it needs to be added to\n * {@link module:engine/view/view~View} by {@link module:engine/view/view~View#addObserver} method.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class MouseObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = 'mousedown';\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when mouse button is pressed down on one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/mouseobserver~MouseObserver}.\n *\n * Note that this event is not available by default. To make it available {@link module:engine/view/observer/mouseobserver~MouseObserver}\n * needs to be added to {@link module:engine/view/view~View} by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @see module:engine/view/observer/mouseobserver~MouseObserver\n * @event module:engine/view/document~Document#event:mousedown\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module widget/widget\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport MouseObserver from '@ckeditor/ckeditor5-engine/src/view/observer/mouseobserver';\nimport { getLabel, isWidget, WIDGET_SELECTED_CLASS_NAME } from './utils';\nimport { getCode, keyCodes, parseKeystroke } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport '../theme/widget.css';\n\nconst selectAllKeystrokeCode = parseKeystroke( 'Ctrl+A' );\n\n/**\n * The widget plugin. It enables base support for widgets.\n *\n * See {@glink api/widget package page} for more details and documentation.\n *\n * This plugin enables multiple behaviors required by widgets:\n *\n * * The model to view selection converter for the editing pipeline (it handles widget custom selection rendering).\n * If a converted selection wraps around a widget element, that selection is marked as\n * {@link module:engine/view/selection~Selection#isFake fake}. Additionally, the `ck-widget_selected` CSS class\n * is added to indicate that widget has been selected.\n * * The mouse and keyboard events handling on and around widget elements.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Widget extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Widget';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst view = this.editor.editing.view;\n\t\tconst viewDocument = view.document;\n\n\t\t/**\n\t\t * Holds previously selected widgets.\n\t\t *\n\t\t * @private\n\t\t * @type {Set.<module:engine/view/element~Element>}\n\t\t */\n\t\tthis._previouslySelected = new Set();\n\n\t\t// Model to view selection converter.\n\t\t// Converts selection placed over widget element to fake selection\n\t\tthis.editor.editing.downcastDispatcher.on( 'selection', ( evt, data, conversionApi ) => {\n\t\t\t// Remove selected class from previously selected widgets.\n\t\t\tthis._clearPreviouslySelectedWidgets( conversionApi.writer );\n\n\t\t\tconst viewWriter = conversionApi.writer;\n\t\t\tconst viewSelection = viewWriter.document.selection;\n\t\t\tconst selectedElement = viewSelection.getSelectedElement();\n\t\t\tlet lastMarked = null;\n\n\t\t\tfor ( const range of viewSelection.getRanges() ) {\n\t\t\t\tfor ( const value of range ) {\n\t\t\t\t\tconst node = value.item;\n\n\t\t\t\t\t// Do not mark nested widgets in selected one. See: #57.\n\t\t\t\t\tif ( isWidget( node ) && !isChild( node, lastMarked ) ) {\n\t\t\t\t\t\tviewWriter.addClass( WIDGET_SELECTED_CLASS_NAME, node );\n\n\t\t\t\t\t\tthis._previouslySelected.add( node );\n\t\t\t\t\t\tlastMarked = node;\n\n\t\t\t\t\t\t// Check if widget is a single element selected.\n\t\t\t\t\t\tif ( node == selectedElement ) {\n\t\t\t\t\t\t\tviewWriter.setSelection( viewSelection.getRanges(), { fake: true, label: getLabel( selectedElement ) } );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// If mouse down is pressed on widget - create selection over whole widget.\n\t\tview.addObserver( MouseObserver );\n\t\tthis.listenTo( viewDocument, 'mousedown', ( ...args ) => this._onMousedown( ...args ) );\n\n\t\t// Handle custom keydown behaviour.\n\t\tthis.listenTo( viewDocument, 'keydown', ( ...args ) => this._onKeydown( ...args ), { priority: 'high' } );\n\n\t\t// Handle custom delete behaviour.\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\tif ( this._handleDelete( data.direction == 'forward' ) ) {\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:mousedown mousedown} events on widget elements.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_onMousedown( eventInfo, domEventData ) {\n\t\tconst editor = this.editor;\n\t\tconst view = editor.editing.view;\n\t\tconst viewDocument = view.document;\n\t\tlet element = domEventData.target;\n\n\t\t// Do nothing for single or double click inside nested editable.\n\t\tif ( isInsideNestedEditable( element ) ) {\n\t\t\t// But at least triple click inside nested editable causes broken selection in Safari.\n\t\t\t// For such event, we select the entire nested editable element.\n\t\t\t// See: https://github.com/ckeditor/ckeditor5/issues/1463.\n\t\t\tif ( env.isSafari && domEventData.domEvent.detail >= 3 ) {\n\t\t\t\tconst mapper = editor.editing.mapper;\n\t\t\t\tconst modelElement = mapper.toModelElement( element );\n\n\t\t\t\tthis.editor.model.change( writer => {\n\t\t\t\t\tdomEventData.preventDefault();\n\t\t\t\t\twriter.setSelection( modelElement, 'in' );\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// If target is not a widget element - check if one of the ancestors is.\n\t\tif ( !isWidget( element ) ) {\n\t\t\telement = element.findAncestor( isWidget );\n\n\t\t\tif ( !element ) {\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\n\t\tdomEventData.preventDefault();\n\n\t\t// Focus editor if is not focused already.\n\t\tif ( !viewDocument.isFocused ) {\n\t\t\tview.focus();\n\t\t}\n\n\t\t// Create model selection over widget.\n\t\tconst modelElement = editor.editing.mapper.toModelElement( element );\n\n\t\tthis._setSelectionOverElement( modelElement );\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:keydown keydown} events.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_onKeydown( eventInfo, domEventData ) {\n\t\tconst keyCode = domEventData.keyCode;\n\t\tconst isLtrContent = this.editor.locale.contentLanguageDirection === 'ltr';\n\t\tconst isForward = keyCode == keyCodes.arrowdown || keyCode == keyCodes[ isLtrContent ? 'arrowright' : 'arrowleft' ];\n\t\tlet wasHandled = false;\n\n\t\t// Checks if the keys were handled and then prevents the default event behaviour and stops\n\t\t// the propagation.\n\t\tif ( isArrowKeyCode( keyCode ) ) {\n\t\t\twasHandled = this._handleArrowKeys( isForward );\n\t\t} else if ( isSelectAllKeyCode( domEventData ) ) {\n\t\t\twasHandled = this._selectAllNestedEditableContent() || this._selectAllContent();\n\t\t} else if ( keyCode === keyCodes.enter ) {\n\t\t\twasHandled = this._handleEnterKey( domEventData.shiftKey );\n\t\t}\n\n\t\tif ( wasHandled ) {\n\t\t\tdomEventData.preventDefault();\n\t\t\teventInfo.stop();\n\t\t}\n\t}\n\n\t/**\n\t * Handles delete keys: backspace and delete.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Set to true if delete was performed in forward direction.\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleDelete( isForward ) {\n\t\t// Do nothing when the read only mode is enabled.\n\t\tif ( this.editor.isReadOnly ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelDocument = this.editor.model.document;\n\t\tconst modelSelection = modelDocument.selection;\n\n\t\t// Do nothing on non-collapsed selection.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst objectElement = this._getObjectElementNextToSelection( isForward );\n\n\t\tif ( objectElement ) {\n\t\t\tthis.editor.model.change( writer => {\n\t\t\t\tlet previousNode = modelSelection.anchor.parent;\n\n\t\t\t\t// Remove previous element if empty.\n\t\t\t\twhile ( previousNode.isEmpty ) {\n\t\t\t\t\tconst nodeToRemove = previousNode;\n\t\t\t\t\tpreviousNode = nodeToRemove.parent;\n\n\t\t\t\t\twriter.remove( nodeToRemove );\n\t\t\t\t}\n\n\t\t\t\tthis._setSelectionOverElement( objectElement );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Handles arrow keys.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Set to true if arrow key should be handled in forward direction.\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleArrowKeys( isForward ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst modelDocument = model.document;\n\t\tconst modelSelection = modelDocument.selection;\n\t\tconst objectElement = modelSelection.getSelectedElement();\n\n\t\t// If object element is selected.\n\t\tif ( objectElement && schema.isObject( objectElement ) ) {\n\t\t\tconst position = isForward ? modelSelection.getLastPosition() : modelSelection.getFirstPosition();\n\t\t\tconst newRange = schema.getNearestSelectionRange( position, isForward ? 'forward' : 'backward' );\n\n\t\t\tif ( newRange ) {\n\t\t\t\tmodel.change( writer => {\n\t\t\t\t\twriter.setSelection( newRange );\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn true;\n\t\t}\n\n\t\t// If selection is next to object element.\n\t\t// Return if not collapsed.\n\t\tif ( !modelSelection.isCollapsed ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst objectElement2 = this._getObjectElementNextToSelection( isForward );\n\n\t\tif ( !!objectElement2 && schema.isObject( objectElement2 ) ) {\n\t\t\tthis._setSelectionOverElement( objectElement2 );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Handles the enter key, giving users and access to positions in the editable directly before\n\t * (<kbd>Shift</kbd>+<kbd>Enter</kbd>) or after (<kbd>Enter</kbd>) the selected widget.\n\t * It improves the UX, mainly when the widget is the first or last child of the root editable\n\t * and there's no other way to type after or before it.\n\t *\n\t * @private\n\t * @param {Boolean} isBackwards Set to true if the new paragraph is to be inserted before\n\t * the selected widget (<kbd>Shift</kbd>+<kbd>Enter</kbd>).\n\t * @returns {Boolean|undefined} Returns `true` if keys were handled correctly.\n\t */\n\t_handleEnterKey( isBackwards ) {\n\t\tconst model = this.editor.model;\n\t\tconst modelSelection = model.document.selection;\n\t\tconst selectedElement = modelSelection.getSelectedElement();\n\n\t\tif ( shouldInsertParagraph( selectedElement, model.schema ) ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\tlet position = writer.createPositionAt( selectedElement, isBackwards ? 'before' : 'after' );\n\t\t\t\tconst paragraph = writer.createElement( 'paragraph' );\n\n\t\t\t\t// Split the parent when inside a block element.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5/issues/1529\n\t\t\t\tif ( model.schema.isBlock( selectedElement.parent ) ) {\n\t\t\t\t\tconst paragraphLimit = model.schema.findAllowedParent( position, paragraph );\n\n\t\t\t\t\tposition = writer.split( position, paragraphLimit ).position;\n\t\t\t\t}\n\n\t\t\t\twriter.insert( paragraph, position );\n\t\t\t\twriter.setSelection( paragraph, 'in' );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\t/**\n\t * Extends the {@link module:engine/model/selection~Selection document's selection} to span the entire\n\t * content of the nested editable if already anchored in one.\n\t *\n\t * See: {@link module:engine/model/schema~Schema#getLimitElement}.\n\t *\n\t * @private\n\t */\n\t_selectAllNestedEditableContent() {\n\t\tconst model = this.editor.model;\n\t\tconst documentSelection = model.document.selection;\n\t\tconst limitElement = model.schema.getLimitElement( documentSelection );\n\n\t\tif ( documentSelection.getFirstRange().root == limitElement ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tmodel.change( writer => {\n\t\t\twriter.setSelection( writer.createRangeIn( limitElement ) );\n\t\t} );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Handles <kbd>CTRL + A</kbd> when widget is selected.\n\t *\n\t * @private\n\t * @returns {Boolean} Returns true if widget was selected and selecting all was handled by this method.\n\t */\n\t_selectAllContent() {\n\t\tconst model = this.editor.model;\n\t\tconst editing = this.editor.editing;\n\t\tconst view = editing.view;\n\t\tconst viewDocument = view.document;\n\t\tconst viewSelection = viewDocument.selection;\n\n\t\tconst selectedElement = viewSelection.getSelectedElement();\n\n\t\t// Only widget is selected.\n\t\t// https://github.com/ckeditor/ckeditor5-widget/issues/23\n\t\tif ( selectedElement && isWidget( selectedElement ) ) {\n\t\t\tconst widgetParent = editing.mapper.toModelElement( selectedElement.parent );\n\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( widgetParent ) );\n\t\t\t} );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Sets {@link module:engine/model/selection~Selection document's selection} over given element.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} element\n\t */\n\t_setSelectionOverElement( element ) {\n\t\tthis.editor.model.change( writer => {\n\t\t\twriter.setSelection( writer.createRangeOn( element ) );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if {@link module:engine/model/element~Element element} placed next to the current\n\t * {@link module:engine/model/selection~Selection model selection} exists and is marked in\n\t * {@link module:engine/model/schema~Schema schema} as `object`.\n\t *\n\t * @private\n\t * @param {Boolean} forward Direction of checking.\n\t * @returns {module:engine/model/element~Element|null}\n\t */\n\t_getObjectElementNextToSelection( forward ) {\n\t\tconst model = this.editor.model;\n\t\tconst schema = model.schema;\n\t\tconst modelSelection = model.document.selection;\n\n\t\t// Clone current selection to use it as a probe. We must leave default selection as it is so it can return\n\t\t// to its current state after undo.\n\t\tconst probe = model.createSelection( modelSelection );\n\t\tmodel.modifySelection( probe, { direction: forward ? 'forward' : 'backward' } );\n\t\tconst objectElement = forward ? probe.focus.nodeBefore : probe.focus.nodeAfter;\n\n\t\tif ( !!objectElement && schema.isObject( objectElement ) ) {\n\t\t\treturn objectElement;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Removes CSS class from previously selected widgets.\n\t *\n\t * @private\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n\t */\n\t_clearPreviouslySelectedWidgets( writer ) {\n\t\tfor ( const widget of this._previouslySelected ) {\n\t\t\twriter.removeClass( WIDGET_SELECTED_CLASS_NAME, widget );\n\t\t}\n\n\t\tthis._previouslySelected.clear();\n\t}\n}\n\n// Returns 'true' if provided key code represents one of the arrow keys.\n//\n// @param {Number} keyCode\n// @returns {Boolean}\nfunction isArrowKeyCode( keyCode ) {\n\treturn keyCode == keyCodes.arrowright ||\n\t\tkeyCode == keyCodes.arrowleft ||\n\t\tkeyCode == keyCodes.arrowup ||\n\t\tkeyCode == keyCodes.arrowdown;\n}\n\n// Returns 'true' if provided (DOM) key event data corresponds with the Ctrl+A keystroke.\n//\n// @param {module:engine/view/observer/keyobserver~KeyEventData} domEventData\n// @returns {Boolean}\nfunction isSelectAllKeyCode( domEventData ) {\n\treturn getCode( domEventData ) == selectAllKeystrokeCode;\n}\n\n// Returns `true` when element is a nested editable or is placed inside one.\n//\n// @param {module:engine/view/element~Element}\n// @returns {Boolean}\nfunction isInsideNestedEditable( element ) {\n\twhile ( element ) {\n\t\tif ( element.is( 'editableElement' ) && !element.is( 'rootElement' ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Click on nested widget should select it.\n\t\tif ( isWidget( element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\telement = element.parent;\n\t}\n\n\treturn false;\n}\n\n// Checks whether the specified `element` is a child of the `parent` element.\n//\n// @param {module:engine/view/element~Element} element An element to check.\n// @param {module:engine/view/element~Element|null} parent A parent for the element.\n// @returns {Boolean}\nfunction isChild( element, parent ) {\n\tif ( !parent ) {\n\t\treturn false;\n\t}\n\n\treturn Array.from( element.getAncestors() ).includes( parent );\n}\n\n// Checks if enter key should insert paragraph. This should be done only on elements of type object (excluding inline objects).\n//\n// @param {module:engine/model/element~Element} element And element to check.\n// @param {module:engine/model/schema~Schema} schema\nfunction shouldInsertParagraph( element, schema ) {\n\treturn element && schema.isObject( element ) && !schema.isInline( element );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative/imagetextalternativecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { isImage } from '../image/utils';\n\n/**\n * The image text alternative command. It is used to change the `alt` attribute of `<image>` elements.\n *\n * @extends module:core/command~Command\n */\nexport default class ImageTextAlternativeCommand extends Command {\n\t/**\n\t * The command value: `false` if there is no `alt` attribute, otherwise the value of the `alt` attribute.\n\t *\n\t * @readonly\n\t * @observable\n\t * @member {String|Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst element = this.editor.model.document.selection.getSelectedElement();\n\n\t\tthis.isEnabled = isImage( element );\n\n\t\tif ( isImage( element ) && element.hasAttribute( 'alt' ) ) {\n\t\t\tthis.value = element.getAttribute( 'alt' );\n\t\t} else {\n\t\t\tthis.value = false;\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options\n\t * @param {String} options.newValue The new value of the `alt` attribute to set.\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\t\tconst imageElement = model.document.selection.getSelectedElement();\n\n\t\tmodel.change( writer => {\n\t\t\twriter.setAttribute( 'alt', options.newValue, imageElement );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative/imagetextalternativeediting\n */\n\nimport ImageTextAlternativeCommand from './imagetextalternativecommand';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The image text alternative editing plugin.\n *\n * Registers the `'imageTextAlternative'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternativeEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageTextAlternativeEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tthis.editor.commands.add( 'imageTextAlternative', new ImageTextAlternativeCommand( this.editor ) );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/labeledinput/labeledinputview\n */\n\nimport View from '../view';\nimport uid from '@ckeditor/ckeditor5-utils/src/uid';\nimport LabelView from '../label/labelview';\nimport '../../theme/components/labeledinput/labeledinput.css';\n\n/**\n * The labeled input view class.\n *\n * @extends module:ui/view~View\n */\nexport default class LabeledInputView extends View {\n\t/**\n\t * Creates an instance of the labeled input view class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The locale instance.\n\t * @param {Function} InputView Constructor of the input view.\n\t */\n\tconstructor( locale, InputView ) {\n\t\tsuper( locale );\n\n\t\tconst inputUid = `ck-input-${ uid() }`;\n\t\tconst statusUid = `ck-status-${ uid() }`;\n\n\t\t/**\n\t\t * The text of the label.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #label\n\t\t */\n\t\tthis.set( 'label' );\n\n\t\t/**\n\t\t * The value of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * Controls whether the component is in read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * The validation error text. When set, it will be displayed\n\t\t * next to the {@link #inputView} as a typical validation error message.\n\t\t * Set it to `null` to hide the message.\n\t\t *\n\t\t * **Note:** Setting this property to anything but `null` will automatically\n\t\t * make the {@link module:ui/inputtext/inputtextview~InputTextView#hasError `hasError`}\n\t\t * of the {@link #inputView} `true`.\n\t\t *\n\t\t * **Note:** Typing in the {@link #inputView} which fires the\n\t\t * {@link module:ui/inputtext/inputtextview~InputTextView#event:input `input` event}\n\t\t * resets this property back to `null`, indicating that the input field can be re–validated.\n\t\t *\n\t\t * @observable\n\t\t * @member {String|null} #errorText\n\t\t */\n\t\tthis.set( 'errorText', null );\n\n\t\t/**\n\t\t * The additional information text displayed next to the {@link #inputView} which can\n\t\t * be used to inform the user about the purpose of the input, provide help or hints.\n\t\t *\n\t\t * Set it to `null` to hide the message.\n\t\t *\n\t\t * **Note:** This text will be displayed in the same place as {@link #errorText} but the\n\t\t * latter always takes precedence: if the {@link #errorText} is set, it replaces\n\t\t * {@link #errorText} for as long as the value of the input is invalid.\n\t\t *\n\t\t * @observable\n\t\t * @member {String|null} #infoText\n\t\t */\n\t\tthis.set( 'infoText', null );\n\n\t\t/**\n\t\t * The label view.\n\t\t *\n\t\t * @member {module:ui/label/labelview~LabelView} #labelView\n\t\t */\n\t\tthis.labelView = this._createLabelView( inputUid );\n\n\t\t/**\n\t\t * The input view.\n\t\t *\n\t\t * @member {module:ui/inputtext/inputtextview~InputTextView} #inputView\n\t\t */\n\t\tthis.inputView = this._createInputView( InputView, inputUid, statusUid );\n\n\t\t/**\n\t\t * The status view for the {@link #inputView}. It displays {@link #errorText} and\n\t\t * {@link #infoText}.\n\t\t *\n\t\t * @member {module:ui/view~View} #statusView\n\t\t */\n\t\tthis.statusView = this._createStatusView( statusUid );\n\n\t\t/**\n\t\t * The combined status text made of {@link #errorText} and {@link #infoText}.\n\t\t * Note that when present, {@link #errorText} always takes precedence in the\n\t\t * status.\n\t\t *\n\t\t * @see #errorText\n\t\t * @see #infoText\n\t\t * @see #statusView\n\t\t * @private\n\t\t * @observable\n\t\t * @member {String|null} #_statusText\n\t\t */\n\t\tthis.bind( '_statusText' ).to(\n\t\t\tthis, 'errorText',\n\t\t\tthis, 'infoText',\n\t\t\t( errorText, infoText ) => errorText || infoText\n\t\t);\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-labeled-input',\n\t\t\t\t\tbind.if( 'isReadOnly', 'ck-disabled' )\n\t\t\t\t]\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis.labelView,\n\t\t\t\tthis.inputView,\n\t\t\t\tthis.statusView\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * Creates label view class instance and bind with view.\n\t *\n\t * @private\n\t * @param {String} id Unique id to set as labelView#for attribute.\n\t * @returns {module:ui/label/labelview~LabelView}\n\t */\n\t_createLabelView( id ) {\n\t\tconst labelView = new LabelView( this.locale );\n\n\t\tlabelView.for = id;\n\t\tlabelView.bind( 'text' ).to( this, 'label' );\n\n\t\treturn labelView;\n\t}\n\n\t/**\n\t * Creates input view class instance and bind with view.\n\t *\n\t * @private\n\t * @param {Function} InputView Input view constructor.\n\t * @param {String} inputUid Unique id to set as inputView#id attribute.\n\t * @param {String} statusUid Unique id of the status for the input's `aria-describedby` attribute.\n\t * @returns {module:ui/inputtext/inputtextview~InputTextView}\n\t */\n\t_createInputView( InputView, inputUid, statusUid ) {\n\t\tconst inputView = new InputView( this.locale, statusUid );\n\n\t\tinputView.id = inputUid;\n\t\tinputView.ariaDescribedById = statusUid;\n\t\tinputView.bind( 'value' ).to( this );\n\t\tinputView.bind( 'isReadOnly' ).to( this );\n\t\tinputView.bind( 'hasError' ).to( this, 'errorText', value => !!value );\n\n\t\tinputView.on( 'input', () => {\n\t\t\t// UX: Make the error text disappear and disable the error indicator as the user\n\t\t\t// starts fixing the errors.\n\t\t\tthis.errorText = null;\n\t\t} );\n\n\t\treturn inputView;\n\t}\n\n\t/**\n\t * Creates the status view instance. It displays {@link #errorText} and {@link #infoText}\n\t * next to the {@link #inputView}. See {@link #_statusText}.\n\t *\n\t * @private\n\t * @param {String} statusUid Unique id of the status, shared with the input's `aria-describedby` attribute.\n\t * @returns {module:ui/view~View}\n\t */\n\t_createStatusView( statusUid ) {\n\t\tconst statusView = new View( this.locale );\n\t\tconst bind = this.bindTemplate;\n\n\t\tstatusView.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-labeled-input__status',\n\t\t\t\t\tbind.if( 'errorText', 'ck-labeled-input__status_error' ),\n\t\t\t\t\tbind.if( '_statusText', 'ck-hidden', value => !value )\n\t\t\t\t],\n\t\t\t\tid: statusUid,\n\t\t\t\trole: bind.if( 'errorText', 'alert' )\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttext: bind.to( '_statusText' )\n\t\t\t\t}\n\t\t\t]\n\t\t} );\n\n\t\treturn statusView;\n\t}\n\n\t/**\n\t * Moves the focus to the input and selects the value.\n\t */\n\tselect() {\n\t\tthis.inputView.select();\n\t}\n\n\t/**\n\t * Focuses the input.\n\t */\n\tfocus() {\n\t\tthis.inputView.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/inputtext/inputtextview\n */\n\nimport View from '../view';\nimport '../../theme/components/inputtext/inputtext.css';\n\n/**\n * The text input view class.\n *\n * @extends module:ui/view~View\n */\nexport default class InputTextView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The value of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #value\n\t\t */\n\t\tthis.set( 'value' );\n\n\t\t/**\n\t\t * The `id` attribute of the input (i.e. to pair with a `<label>` element).\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #id\n\t\t */\n\t\tthis.set( 'id' );\n\n\t\t/**\n\t\t * The `placeholder` attribute of the input.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #placeholder\n\t\t */\n\t\tthis.set( 'placeholder' );\n\n\t\t/**\n\t\t * Controls whether the input view is in read-only mode.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isReadOnly\n\t\t */\n\t\tthis.set( 'isReadOnly', false );\n\n\t\t/**\n\t\t * Set to `true` when the field has some error. Usually controlled via\n\t\t * {@link module:ui/labeledinput/labeledinputview~LabeledInputView#errorText}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #hasError\n\t\t */\n\t\tthis.set( 'hasError', false );\n\n\t\t/**\n\t\t * The `id` of the element describing this field, e.g. when it has\n\t\t * some error, it helps screen readers read the error text.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #ariaDescribedById\n\t\t */\n\t\tthis.set( 'ariaDescribedById' );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'input',\n\t\t\tattributes: {\n\t\t\t\ttype: 'text',\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-input',\n\t\t\t\t\t'ck-input-text',\n\t\t\t\t\tbind.if( 'hasError', 'ck-error' )\n\t\t\t\t],\n\t\t\t\tid: bind.to( 'id' ),\n\t\t\t\tplaceholder: bind.to( 'placeholder' ),\n\t\t\t\treadonly: bind.to( 'isReadOnly' ),\n\t\t\t\t'aria-invalid': bind.if( 'hasError', true ),\n\t\t\t\t'aria-describedby': bind.to( 'ariaDescribedById' )\n\t\t\t},\n\t\t\ton: {\n\t\t\t\tinput: bind.to( 'input' )\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Fired when the user types in the input. Corresponds to the native\n\t\t * DOM `input` event.\n\t\t *\n\t\t * @event input\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trender() {\n\t\tsuper.render();\n\n\t\tconst setValue = value => {\n\t\t\tthis.element.value = ( !value && value !== 0 ) ? '' : value;\n\t\t};\n\n\t\tsetValue( this.value );\n\n\t\t// Bind `this.value` to the DOM element's value.\n\t\t// We cannot use `value` DOM attribute because removing it on Edge does not clear the DOM element's value property.\n\t\tthis.on( 'change:value', ( evt, name, value ) => {\n\t\t\tsetValue( value );\n\t\t} );\n\t}\n\n\t/**\n\t * Moves the focus to the input and selects the value.\n\t */\n\tselect() {\n\t\tthis.element.select();\n\t}\n\n\t/**\n\t * Focuses the input.\n\t */\n\tfocus() {\n\t\tthis.element.focus();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/bindings/submithandler\n */\n\n/**\n * A handler useful for {@link module:ui/view~View views} working as HTML forms. It intercepts a native DOM\n * `submit` event, prevents the default web browser behavior (navigation and page reload) and\n * fires the `submit` event on a view instead. Such a custom event can be then used by any\n * {@link module:utils/dom/emittermixin~Emitter emitter}, e.g. to serialize the form data.\n *\n *\t\timport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\n *\n *\t\t// ...\n *\n *\t\tclass AnyFormView extends View {\n *\t\t\tconstructor() {\n *\t\t\t\tsuper();\n *\n *\t\t\t\t// ...\n *\n *\t\t\t\tsubmitHandler( {\n *\t\t\t\t\tview: this\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n *\t\t// ...\n *\n *\t\tconst view = new AnyFormView();\n *\n *\t\t// A sample listener attached by an emitter working with the view.\n *\t\tthis.listenTo( view, 'submit', () => {\n *\t\t\tsaveTheFormData();\n *\t\t\thideTheForm();\n *\t\t} );\n *\n * @param {Object} [options] Configuration options.\n * @param {module:ui/view~View} options.view The view which DOM `submit` events should be handled.\n */\nexport default function submitHandler( { view } ) {\n\tview.listenTo( view.element, 'submit', ( evt, domEvt ) => {\n\t\tdomEvt.preventDefault();\n\t\tview.fire( 'submit' );\n\t}, { useCapture: true } );\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M6.972 16.615a.997.997 0 0 1-.744-.292l-4.596-4.596a1 1 0 1 1 1.414-1.414l3.926 3.926 9.937-9.937a1 1 0 0 1 1.414 1.415L7.717 16.323a.997.997 0 0 1-.745.292z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetextalternative/ui/textalternativeformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../../theme/textalternativeform.css';\n/**\n * The TextAlternativeFormView class.\n *\n * @extends module:ui/view~View\n */\nexport default class TextAlternativeFormView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = this.locale.t;\n /**\n\t\t * Tracks information about the DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * A textarea with a label.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView} #labeledTextarea\n\t\t */\n this.labeledInput = this._createLabeledInputView();\n /**\n\t\t * A button used to submit the form.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView} #saveButtonView\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * A button used to cancel the form.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView} #cancelButtonView\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of views which can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: [\n 'ck',\n 'ck-text-alternative-form'\n ],\n // https://github.com/ckeditor/ckeditor5-image/issues/40\n tabindex: '-1'\n },\n children: [\n this.labeledInput,\n this.saveButtonView,\n this.cancelButtonView\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n this.keystrokes.listenTo(this.element);\n submitHandler({ view: this });\n [\n this.labeledInput,\n this.saveButtonView,\n this.cancelButtonView\n ].forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n }\n /**\n\t * Creates the button view.\n\t *\n\t * @private\n\t * @param {String} label The button label\n\t * @param {String} icon The button's icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] The event name that the ButtonView#execute event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n /**\n\t * Creates an input with a label.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t */\n _createLabeledInputView() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n labeledInput.label = t('cd');\n labeledInput.inputView.placeholder = t('cd');\n return labeledInput;\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module ui/panel/balloon/balloonpanelview\n */\n\nimport View from '../../view';\nimport { getOptimalPosition } from '@ckeditor/ckeditor5-utils/src/dom/position';\nimport isRange from '@ckeditor/ckeditor5-utils/src/dom/isrange';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport { isElement } from 'lodash-es';\n\nimport '../../../theme/components/panel/balloonpanel.css';\n\nconst toPx = toUnit( 'px' );\nconst defaultLimiterElement = global.document.body;\n\n/**\n * The balloon panel view class.\n *\n * A floating container which can\n * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#pin pin} to any\n * {@link module:utils/dom/position~Options#target target} in the DOM and remain in that position\n * e.g. when the web page is scrolled.\n *\n * The balloon panel can be used to display contextual, non-blocking UI like forms, toolbars and\n * the like in its {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#content} view\n * collection.\n *\n * There is a number of {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}\n * that the balloon can use, automatically switching from one to another when the viewport space becomes\n * scarce to keep the balloon visible to the user as long as it is possible. The balloon will also\n * accept any custom position set provided by the user compatible with the\n * {@link module:utils/dom/position~Options options}.\n *\n *\t\tconst panel = new BalloonPanelView( locale );\n *\t\tconst childView = new ChildView();\n *\t\tconst positions = BalloonPanelView.defaultPositions;\n *\n *\t\tpanel.render();\n *\n *\t\t// Add a child view to the panel's content collection.\n *\t\tpanel.content.add( childView );\n *\n *\t\t// Start pinning the panel to an element with the \"target\" id DOM.\n *\t\t// The balloon will remain pinned until unpin() is called.\n *\t\tpanel.pin( {\n *\t\t\ttarget: document.querySelector( '#target' ),\n *\t\t\tpositions: [\n *\t\t\t\tpositions.northArrowSouth,\n *\t\t\t\tpositions.southArrowNorth\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:ui/view~View\n */\nexport default class BalloonPanelView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * The absolute top position of the balloon panel in pixels.\n\t\t *\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #top\n\t\t */\n\t\tthis.set( 'top', 0 );\n\n\t\t/**\n\t\t * The absolute left position of the balloon panel in pixels.\n\t\t *\n\t\t * @observable\n\t\t * @default 0\n\t\t * @member {Number} #left\n\t\t */\n\t\tthis.set( 'left', 0 );\n\n\t\t/**\n\t\t * The balloon panel's current position. The position name is reflected in the CSS class set\n\t\t * to the balloon, i.e. `.ck-balloon-panel_arrow_nw` for the \"arrow_nw\" position. The class\n\t\t * controls the minor aspects of the balloon's visual appearance like the placement\n\t\t * of an {@link #withArrow arrow}. To support a new position, an additional CSS must be created.\n\t\t *\n\t\t * Default position names correspond with\n\t\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t\t *\n\t\t * See the {@link #attachTo} and {@link #pin} methods to learn about custom balloon positions.\n\t\t *\n\t\t * @observable\n\t\t * @default 'arrow_nw'\n\t\t * @member {'arrow_nw'|'arrow_ne'|'arrow_sw'|'arrow_se'} #position\n\t\t */\n\t\tthis.set( 'position', 'arrow_nw' );\n\n\t\t/**\n\t\t * Controls whether the balloon panel is visible or not.\n\t\t *\n\t\t * @observable\n\t\t * @default false\n\t\t * @member {Boolean} #isVisible\n\t\t */\n\t\tthis.set( 'isVisible', false );\n\n\t\t/**\n\t\t * Controls whether the balloon panel has an arrow. The presence of the arrow\n\t\t * is reflected in the `ck-balloon-panel_with-arrow` CSS class.\n\t\t *\n\t\t * @observable\n\t\t * @default true\n\t\t * @member {Boolean} #withArrow\n\t\t */\n\t\tthis.set( 'withArrow', true );\n\n\t\t/**\n\t\t * An additional CSS class added to the {@link #element}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #class\n\t\t */\n\t\tthis.set( 'class' );\n\n\t\t/**\n\t\t * A callback that starts pinning the panel when {@link #isVisible} gets\n\t\t * `true`. Used by {@link #pin}.\n\t\t *\n\t\t * @private\n\t\t * @member {Function} #_pinWhenIsVisibleCallback\n\t\t */\n\n\t\t/**\n\t\t * A collection of the child views that creates the balloon panel contents.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.content = this.createCollection();\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck',\n\t\t\t\t\t'ck-balloon-panel',\n\t\t\t\t\tbind.to( 'position', value => `ck-balloon-panel_${ value }` ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-balloon-panel_visible' ),\n\t\t\t\t\tbind.if( 'withArrow', 'ck-balloon-panel_with-arrow' ),\n\t\t\t\t\tbind.to( 'class' )\n\t\t\t\t],\n\n\t\t\t\tstyle: {\n\t\t\t\t\ttop: bind.to( 'top', toPx ),\n\t\t\t\t\tleft: bind.to( 'left', toPx )\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tchildren: this.content\n\t\t} );\n\t}\n\n\t/**\n\t * Shows the panel.\n\t *\n\t * See {@link #isVisible}.\n\t */\n\tshow() {\n\t\tthis.isVisible = true;\n\t}\n\n\t/**\n\t * Hides the panel.\n\t *\n\t * See {@link #isVisible}.\n\t */\n\thide() {\n\t\tthis.isVisible = false;\n\t}\n\n\t/**\n\t * Attaches the panel to a specified {@link module:utils/dom/position~Options#target} with a\n\t * smart positioning heuristics that chooses from available positions to make sure the panel\n\t * is visible to the user i.e. within the limits of the viewport.\n\t *\n\t * This method accepts configuration {@link module:utils/dom/position~Options options}\n\t * to set the `target`, optional `limiter` and `positions` the balloon should choose from.\n\t *\n\t *\t\tconst panel = new BalloonPanelView( locale );\n\t *\t\tconst positions = BalloonPanelView.defaultPositions;\n\t *\n\t *\t\tpanel.render();\n\t *\n\t *\t\t// Attach the panel to an element with the \"target\" id DOM.\n\t *\t\tpanel.attachTo( {\n\t *\t\t\ttarget: document.querySelector( '#target' ),\n\t *\t\t\tpositions: [\n\t *\t\t\t\tpositions.northArrowSouth,\n\t *\t\t\t\tpositions.southArrowNorth\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t * **Note**: Attaching the panel will also automatically {@link #show} it.\n\t *\n\t * **Note**: An attached panel will not follow its target when the window is scrolled or resized.\n\t * See the {@link #pin} method for a more permanent positioning strategy.\n\t *\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}. Default `positions` array is\n\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t */\n\tattachTo( options ) {\n\t\tthis.show();\n\n\t\tconst defaultPositions = BalloonPanelView.defaultPositions;\n\t\tconst positionOptions = Object.assign( {}, {\n\t\t\telement: this.element,\n\t\t\tpositions: [\n\t\t\t\tdefaultPositions.southArrowNorth,\n\t\t\t\tdefaultPositions.southArrowNorthWest,\n\t\t\t\tdefaultPositions.southArrowNorthEast,\n\t\t\t\tdefaultPositions.northArrowSouth,\n\t\t\t\tdefaultPositions.northArrowSouthWest,\n\t\t\t\tdefaultPositions.northArrowSouthEast\n\t\t\t],\n\t\t\tlimiter: defaultLimiterElement,\n\t\t\tfitInViewport: true\n\t\t}, options );\n\n\t\tconst optimalPosition = BalloonPanelView._getOptimalPosition( positionOptions );\n\n\t\t// Usually browsers make some problems with super accurate values like 104.345px\n\t\t// so it is better to use int values.\n\t\tconst left = parseInt( optimalPosition.left );\n\t\tconst top = parseInt( optimalPosition.top );\n\t\tconst position = optimalPosition.name;\n\n\t\tObject.assign( this, { top, left, position } );\n\t}\n\n\t/**\n\t * Works the same way as the {@link #attachTo} method except that the position of the panel is\n\t * continuously updated when:\n\t *\n\t * * any ancestor of the {@link module:utils/dom/position~Options#target}\n\t * or {@link module:utils/dom/position~Options#limiter} is scrolled,\n\t * * the browser window gets resized or scrolled.\n\t *\n\t * Thanks to that, the panel always sticks to the {@link module:utils/dom/position~Options#target}\n\t * and is immune to the changing environment.\n\t *\n\t *\t\tconst panel = new BalloonPanelView( locale );\n\t *\t\tconst positions = BalloonPanelView.defaultPositions;\n\t *\n\t *\t\tpanel.render();\n\t *\n\t *\t\t// Pin the panel to an element with the \"target\" id DOM.\n\t *\t\tpanel.pin( {\n\t *\t\t\ttarget: document.querySelector( '#target' ),\n\t *\t\t\tpositions: [\n\t *\t\t\t\tpositions.northArrowSouth,\n\t *\t\t\t\tpositions.southArrowNorth\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t * To leave the pinned state, use the {@link #unpin} method.\n\t *\n\t * **Note**: Pinning the panel will also automatically {@link #show} it.\n\t *\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}. Default `positions` array is\n\t * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions}.\n\t */\n\tpin( options ) {\n\t\tthis.unpin();\n\n\t\tthis._pinWhenIsVisibleCallback = () => {\n\t\t\tif ( this.isVisible ) {\n\t\t\t\tthis._startPinning( options );\n\t\t\t} else {\n\t\t\t\tthis._stopPinning();\n\t\t\t}\n\t\t};\n\n\t\tthis._startPinning( options );\n\n\t\t// Control the state of the listeners depending on whether the panel is visible\n\t\t// or not.\n\t\t// TODO: Use on() (https://github.com/ckeditor/ckeditor5-utils/issues/144).\n\t\tthis.listenTo( this, 'change:isVisible', this._pinWhenIsVisibleCallback );\n\t}\n\n\t/**\n\t * Stops pinning the panel, as set up by {@link #pin}.\n\t */\n\tunpin() {\n\t\tif ( this._pinWhenIsVisibleCallback ) {\n\t\t\t// Deactivate listeners attached by pin().\n\t\t\tthis._stopPinning();\n\n\t\t\t// Deactivate the panel pin() control logic.\n\t\t\t// TODO: Use off() (https://github.com/ckeditor/ckeditor5-utils/issues/144).\n\t\t\tthis.stopListening( this, 'change:isVisible', this._pinWhenIsVisibleCallback );\n\n\t\t\tthis._pinWhenIsVisibleCallback = null;\n\n\t\t\tthis.hide();\n\t\t}\n\t}\n\n\t/**\n\t * Starts managing the pinned state of the panel. See {@link #pin}.\n\t *\n\t * @private\n\t * @param {module:utils/dom/position~Options} options Positioning options compatible with\n\t * {@link module:utils/dom/position~getOptimalPosition}.\n\t */\n\t_startPinning( options ) {\n\t\tthis.attachTo( options );\n\n\t\tconst targetElement = getDomElement( options.target );\n\t\tconst limiterElement = options.limiter ? getDomElement( options.limiter ) : defaultLimiterElement;\n\n\t\t// Then we need to listen on scroll event of eny element in the document.\n\t\tthis.listenTo( global.document, 'scroll', ( evt, domEvt ) => {\n\t\t\tconst scrollTarget = domEvt.target;\n\n\t\t\t// The position needs to be updated if the positioning target is within the scrolled element.\n\t\t\tconst isWithinScrollTarget = targetElement && scrollTarget.contains( targetElement );\n\n\t\t\t// The position needs to be updated if the positioning limiter is within the scrolled element.\n\t\t\tconst isLimiterWithinScrollTarget = limiterElement && scrollTarget.contains( limiterElement );\n\n\t\t\t// The positioning target and/or limiter can be a Rect, object etc..\n\t\t\t// There's no way to optimize the listener then.\n\t\t\tif ( isWithinScrollTarget || isLimiterWithinScrollTarget || !targetElement || !limiterElement ) {\n\t\t\t\tthis.attachTo( options );\n\t\t\t}\n\t\t}, { useCapture: true } );\n\n\t\t// We need to listen on window resize event and update position.\n\t\tthis.listenTo( global.window, 'resize', () => {\n\t\t\tthis.attachTo( options );\n\t\t} );\n\t}\n\n\t/**\n\t * Stops managing the pinned state of the panel. See {@link #pin}.\n\t *\n\t * @private\n\t */\n\t_stopPinning() {\n\t\tthis.stopListening( global.document, 'scroll' );\n\t\tthis.stopListening( global.window, 'resize' );\n\t}\n}\n\n// Returns the DOM element for given object or null, if there is none,\n// e.g. when the passed object is a Rect instance or so.\n//\n// @private\n// @param {*} object\n// @returns {HTMLElement|null}\nfunction getDomElement( object ) {\n\tif ( isElement( object ) ) {\n\t\treturn object;\n\t}\n\n\tif ( isRange( object ) ) {\n\t\treturn object.commonAncestorContainer;\n\t}\n\n\tif ( typeof object == 'function' ) {\n\t\treturn getDomElement( object() );\n\t}\n\n\treturn null;\n}\n\n/**\n * A horizontal offset of the arrow tip from the edge of the balloon. Controlled by CSS.\n *\n *\t\t +-----|---------...\n *\t\t | |\n *\t\t | |\n *\t\t | |\n *\t\t | |\n *\t\t +--+ | +------...\n *\t\t \\ | /\n *\t\t \\|/\n *\t >|-----|<---------------- horizontal offset\n *\n * @default 30\n * @member {Number} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.arrowHorizontalOffset\n */\nBalloonPanelView.arrowHorizontalOffset = 25;\n\n/**\n * A vertical offset of the arrow from the edge of the balloon. Controlled by CSS.\n *\n *\t\t +-------------...\n *\t\t |\n *\t\t |\n *\t\t | /-- vertical offset\n *\t\t | V\n *\t\t +--+ +-----... ---------\n *\t\t \\ / |\n *\t\t \\/ |\n *\t\t-------------------------------\n *\t\t ^\n *\n * @default 15\n * @member {Number} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.arrowVerticalOffset\n */\nBalloonPanelView.arrowVerticalOffset = 10;\n\n/**\n * Function used to calculate the optimal position for the balloon.\n *\n * @protected\n * @member {Function} module:ui/panel/balloon/balloonpanelview~BalloonPanelView._getOptimalPosition\n */\nBalloonPanelView._getOptimalPosition = getOptimalPosition;\n\n/**\n * A default set of positioning functions used by the balloon panel view\n * when attaching using the {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#attachTo} method.\n *\n * The available positioning functions are as follows:\n *\n * **North**\n *\n * * `northArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northArrowSouthWest`\n *\n * \t\t +-----------------+\n * \t\t | Balloon |\n * \t\t +-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * **North west**\n *\n * * `northWestArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northWestArrowSouthWest`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northWestArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * **North east**\n *\n * * `northEastArrowSouth`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * * `northEastArrowSouthEast`\n *\n * \t\t+-----------------+\n * \t\t| Balloon |\n * \t\t+-----------------+\n * \t\t V\n * \t\t [ Target ]\n *\n * * `northEastArrowSouthWest`\n *\n * \t\t +-----------------+\n * \t\t | Balloon |\n * \t\t +-----------------+\n * \t\t V\n * \t\t[ Target ]\n *\n * **South**\n *\n * * `southArrowNorth`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southArrowNorthWest`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t +-----------------+\n *\t\t | Balloon |\n *\t\t +-----------------+\n *\n * **South west**\n *\n * * `southWestArrowNorth`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southWestArrowNorthWest`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southWestArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * **South east**\n *\n * * `southEastArrowNorth`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southEastArrowNorthEast`\n *\n *\t\t [ Target ]\n *\t\t ^\n *\t\t+-----------------+\n *\t\t| Balloon |\n *\t\t+-----------------+\n *\n * * `southEastArrowNorthWest`\n *\n *\t\t[ Target ]\n *\t\t ^\n *\t\t +-----------------+\n *\t\t | Balloon |\n *\t\t +-----------------+\n *\n * See {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView#attachTo}.\n *\n * Positioning functions must be compatible with {@link module:utils/dom/position~Position}.\n *\n * The name that the position function returns will be reflected in the balloon panel's class that\n * controls the placement of the \"arrow\". See {@link #position} to learn more.\n *\n * @member {Object} module:ui/panel/balloon/balloonpanelview~BalloonPanelView.defaultPositions\n */\nBalloonPanelView.defaultPositions = {\n\t// ------- North\n\n\tnorthArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\tnorthArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\t// ------- North west\n\n\tnorthWestArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthWestArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\tnorthWestArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\t// ------- North east\n\n\tnorthEastArrowSouth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width / 2,\n\t\tname: 'arrow_s'\n\t} ),\n\n\tnorthEastArrowSouthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_se'\n\t} ),\n\n\tnorthEastArrowSouthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getNorthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_sw'\n\t} ),\n\n\t// ------- South\n\n\tsouthArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\tsouthArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left + targetRect.width / 2 - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n\n\t// ------- South west\n\n\tsouthWestArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthWestArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n\n\tsouthWestArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.left - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\t// ------- South east\n\n\tsouthEastArrowNorth: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width / 2,\n\t\tname: 'arrow_n'\n\t} ),\n\n\tsouthEastArrowNorthEast: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - balloonRect.width + BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_ne'\n\t} ),\n\n\tsouthEastArrowNorthWest: ( targetRect, balloonRect ) => ( {\n\t\ttop: getSouthTop( targetRect, balloonRect ),\n\t\tleft: targetRect.right - BalloonPanelView.arrowHorizontalOffset,\n\t\tname: 'arrow_nw'\n\t} ),\n};\n\n// Returns the top coordinate for positions starting with `north*`.\n//\n// @private\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of the balloon.\n// @returns {Number}\nfunction getNorthTop( targetRect, balloonRect ) {\n\treturn targetRect.top - balloonRect.height - BalloonPanelView.arrowVerticalOffset;\n}\n\n// Returns the top coordinate for positions starting with `south*`.\n//\n// @private\n// @param {utils/dom/rect~Rect} targetRect A rect of the target.\n// @param {utils/dom/rect~Rect} elementRect A rect of the balloon.\n// @returns {Number}\nfunction getSouthTop( targetRect ) {\n\treturn targetRect.bottom + BalloonPanelView.arrowVerticalOffset;\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.463 5.187a.888.888 0 1 1 1.254 1.255L9.16 10l3.557 3.557a.888.888 0 1 1-1.254 1.255L7.26 10.61a.888.888 0 0 1 .16-1.382l4.043-4.042z\\\" /></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module ui/panel/balloon/contextualballoon\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BalloonPanelView from './balloonpanelview';\nimport View from '../../view';\nimport ButtonView from '../../button/buttonview';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport toUnit from '@ckeditor/ckeditor5-utils/src/dom/tounit';\nimport Rect from '@ckeditor/ckeditor5-utils/src/dom/rect';\nimport prevIcon from '../../../theme/icons/previous-arrow.svg';\nimport nextIcon from '../../../theme/icons/next-arrow.svg';\nimport '../../../theme/components/panel/balloonrotator.css';\nimport '../../../theme/components/panel/fakepanel.css';\nconst toPx = toUnit('px');\n/**\n * Provides the common contextual balloon for the editor.\n *\n * The role of this plugin is to unify the contextual balloons logic, simplify views management and help\n * avoid the unnecessary complexity of handling multiple {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView}\n * instances in the editor.\n *\n * This plugin allows for creating single or multiple panel stacks.\n *\n * Each stack may have multiple views, with the one on the top being visible. When the visible view is removed from the stack,\n * the previous view becomes visible.\n *\n * It might be useful to implement nested navigation in a balloon. For instance, a toolbar view may contain a link button.\n * When you click it, a link view (which lets you set the URL) is created and put on top of the toolbar view, so the link panel\n * is displayed. When you finish editing the link and close (remove) the link view, the toolbar view is visible again.\n *\n * However, there are cases when there are multiple independent balloons to be displayed, for instance, if the selection\n * is inside two inline comments at the same time. For such cases, you can create two independent panel stacks.\n * The contextual balloon plugin will create a navigation bar to let the users switch between these panel stacks using the \"Next\"\n * and \"Previous\" buttons.\n *\n * If there are no views in the current stack, the balloon panel will try to switch to the next stack. If there are no\n * panels in any stack, the balloon panel will be hidden.\n *\n * **Note**: To force the balloon panel to show only one view, even if there are other stacks, use the `singleViewMode=true` option\n * when {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon#add adding} a view to a panel.\n *\n * From the implementation point of view, the contextual ballon plugin is reusing a single\n * {@link module:ui/panel/balloon/balloonpanelview~BalloonPanelView} instance to display multiple contextual balloon\n * panels in the editor. It also creates a special {@link module:ui/panel/balloon/contextualballoon~RotatorView rotator view},\n * used to manage multiple panel stacks. Rotator view is a child of the balloon panel view and the parent of the specific\n * view you want to display. If there is more than one panel stack to be displayed, the rotator view will add a\n * navigation bar. If there is only one stack, the rotator view is transparent (it does not add any UI elements).\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ContextualBalloon extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ContextualBalloon';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n /**\n\t\t * The {@link module:utils/dom/position~Options#limiter position limiter}\n\t\t * for the {@link #view balloon}, used when no `limiter` has been passed into {@link #add}\n\t\t * or {@link #updatePosition}.\n\t\t *\n\t\t * By default, a function that obtains the farthest DOM\n\t\t * {@link module:engine/view/rooteditableelement~RootEditableElement}\n\t\t * of the {@link module:engine/view/document~Document#selection}.\n\t\t *\n\t\t * @member {module:utils/dom/position~Options#limiter} #positionLimiter\n\t\t */\n this.positionLimiter = () => {\n const view = this.editor.editing.view;\n const viewDocument = view.document;\n const editableElement = viewDocument.selection.editableElement;\n if (editableElement) {\n return view.domConverter.mapViewToDom(editableElement.root);\n }\n return null;\n };\n /**\n\t\t * The currently visible view or `null` when there are no views in any stack.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {module:ui/view~View|null} #visibleView\n\t\t */\n this.set('visibleView', null);\n /**\n\t\t * The common balloon panel view.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/panel/balloon/balloonpanelview~BalloonPanelView} #view\n\t\t */\n this.view = new BalloonPanelView(editor.locale);\n editor.ui.view.body.add(this.view);\n editor.ui.focusTracker.add(this.view.element);\n /**\n\t\t * The map of views and their stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<module:ui/view~View,Set>}\n\t\t */\n this._viewToStack = new Map();\n /**\n\t\t * The map of IDs and stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {Map.<String,Set>}\n\t\t */\n this._idToStack = new Map();\n /**\n\t\t * A total number of all stacks in the balloon.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Number} #_numberOfStacks\n\t\t */\n this.set('_numberOfStacks', 0);\n /**\n\t\t * A flag that controls the single view mode.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #_singleViewMode\n\t\t */\n this.set('_singleViewMode', false);\n /**\n\t\t * Rotator view embedded in the contextual balloon.\n\t\t * Displays the currently visible view in the balloon and provides navigation for switching stacks.\n\t\t *\n\t\t * @private\n\t\t * @type {module:ui/panel/balloon/contextualballoon~RotatorView}\n\t\t */\n this._rotatorView = this._createRotatorView();\n /**\n\t\t * Displays fake panels under the balloon panel view when multiple stacks are added to the balloon.\n\t\t *\n\t\t * @private\n\t\t * @type {module:ui/view~View}\n\t\t */\n this._fakePanelsView = this._createFakePanelsView();\n }\n /**\n\t * Returns `true` when the given view is in one of the stacks. Otherwise returns `false`.\n\t *\n\t * @param {module:ui/view~View} view\n\t * @returns {Boolean}\n\t */\n hasView(view) {\n return Array.from(this._viewToStack.keys()).includes(view);\n }\n /**\n\t * Adds a new view to the stack and makes it visible if the current stack is visible\n\t * or it is the first view in the balloon.\n\t *\n\t * @param {Object} data The configuration of the view.\n\t * @param {String} [data.stackId='main'] The ID of the stack that the view is added to.\n\t * @param {module:ui/view~View} [data.view] The content of the balloon.\n\t * @param {module:utils/dom/position~Options} [data.position] Positioning options.\n\t * @param {String} [data.balloonClassName] An additional CSS class added to the {@link #view balloon} when visible.\n\t * @param {Boolean} [data.withArrow=true] Whether the {@link #view balloon} should be rendered with an arrow.\n\t * @param {Boolean} [data.singleViewMode=false] Whether the view should be the only visible view even if other stacks were added.\n\t */\n add(data) {\n if (this.hasView(data.view)) {\n /**\n\t\t\t * Trying to add configuration of the same view more than once.\n\t\t\t *\n\t\t\t * @error contextualballoon-add-view-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-add-view-exist: Cannot add configuration of the same view twice.', [\n this,\n data\n ]);\n }\n const stackId = data.stackId || 'main';\n // If new stack is added, creates it and show view from this stack.\n if (!this._idToStack.has(stackId)) {\n this._idToStack.set(stackId, new Map([[\n data.view,\n data\n ]]));\n this._viewToStack.set(data.view, this._idToStack.get(stackId));\n this._numberOfStacks = this._idToStack.size;\n if (!this._visibleStack || data.singleViewMode) {\n this.showStack(stackId);\n }\n return;\n }\n const stack = this._idToStack.get(stackId);\n if (data.singleViewMode) {\n this.showStack(stackId);\n }\n // Add new view to the stack.\n stack.set(data.view, data);\n this._viewToStack.set(data.view, stack);\n // And display it if is added to the currently visible stack.\n if (stack === this._visibleStack) {\n this._showView(data);\n }\n }\n /**\n\t * Removes the given view from the stack. If the removed view was visible,\n\t * the view preceding it in the stack will become visible instead.\n\t * When there is no view in the stack, the next stack will be displayed.\n\t * When there are no more stacks, the balloon will hide.\n\t *\n\t * @param {module:ui/view~View} view A view to be removed from the balloon.\n\t */\n remove(view) {\n if (!this.hasView(view)) {\n /**\n\t\t\t * Trying to remove the configuration of the view not defined in the stack.\n\t\t\t *\n\t\t\t * @error contextualballoon-remove-view-not-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-remove-view-not-exist: Cannot remove the configuration of a non-existent view.', [\n this,\n view\n ]);\n }\n const stack = this._viewToStack.get(view);\n if (this._singleViewMode && this.visibleView === view) {\n this._singleViewMode = false;\n }\n // When visible view will be removed we need to show a preceding view or next stack\n // if a view is the only view in the stack.\n if (this.visibleView === view) {\n if (stack.size === 1) {\n if (this._idToStack.size > 1) {\n this._showNextStack();\n } else {\n this.view.hide();\n this.visibleView = null;\n this._rotatorView.hideView();\n }\n } else {\n this._showView(Array.from(stack.values())[stack.size - 2]);\n }\n }\n if (stack.size === 1) {\n this._idToStack.delete(this._getStackId(stack));\n this._numberOfStacks = this._idToStack.size;\n } else {\n stack.delete(view);\n }\n this._viewToStack.delete(view);\n }\n /**\n\t * Updates the position of the balloon using the position data of the first visible view in the stack.\n\t * When new position data is given, the position data of the currently visible view will be updated.\n\t *\n\t * @param {module:utils/dom/position~Options} [position] position options.\n\t */\n updatePosition(position) {\n if (position) {\n this._visibleStack.get(this.visibleView).position = position;\n }\n this.view.pin(this._getBalloonPosition());\n this._fakePanelsView.updatePosition();\n }\n /**\n\t * Shows the last view from the stack of a given ID.\n\t *\n\t * @param {String} id\n\t */\n showStack(id) {\n this.visibleStack = id;\n const stack = this._idToStack.get(id);\n if (!stack) {\n /**\n\t\t\t * Trying to show a stack that does not exist.\n\t\t\t *\n\t\t\t * @error contextualballoon-showstack-stack-not-exist\n\t\t\t */\n throw new CKEditorError('contextualballoon-showstack-stack-not-exist: Cannot show a stack that does not exist.', this);\n }\n if (this._visibleStack === stack) {\n return;\n }\n this._showView(Array.from(stack.values()).pop());\n }\n /**\n\t * Returns the stack of the currently visible view.\n\t *\n\t * @private\n\t * @type {Set}\n\t */\n get _visibleStack() {\n return this._viewToStack.get(this.visibleView);\n }\n /**\n\t * Returns the ID of the given stack.\n\t *\n\t * @private\n\t * @param {Set} stack\n\t * @returns {String}\n\t */\n _getStackId(stack) {\n const entry = Array.from(this._idToStack.entries()).find(entry => entry[1] === stack);\n return entry[0];\n }\n /**\n\t * Shows the last view from the next stack.\n\t *\n\t * @private\n\t */\n _showNextStack() {\n const stacks = Array.from(this._idToStack.values());\n let nextIndex = stacks.indexOf(this._visibleStack) + 1;\n if (!stacks[nextIndex]) {\n nextIndex = 0;\n }\n this.showStack(this._getStackId(stacks[nextIndex]));\n }\n /**\n\t * Shows the last view from the previous stack.\n\t *\n\t * @private\n\t */\n _showPrevStack() {\n const stacks = Array.from(this._idToStack.values());\n let nextIndex = stacks.indexOf(this._visibleStack) - 1;\n if (!stacks[nextIndex]) {\n nextIndex = stacks.length - 1;\n }\n this.showStack(this._getStackId(stacks[nextIndex]));\n }\n /**\n\t * Creates a rotator view.\n\t *\n\t * @private\n\t * @returns {module:ui/panel/balloon/contextualballoon~RotatorView}\n\t */\n _createRotatorView() {\n const view = new RotatorView(this.editor.locale);\n const t = this.editor.locale.t;\n this.view.content.add(view);\n // Hide navigation when there is only a one stack & not in single view mode.\n view.bind('isNavigationVisible').to(this, '_numberOfStacks', this, '_singleViewMode', (value, isSingleViewMode) => {\n return !isSingleViewMode && value > 1;\n });\n // Update balloon position after toggling navigation.\n view.on('change:isNavigationVisible', () => this.updatePosition(), { priority: 'low' });\n // Update stacks counter value.\n view.bind('counter').to(this, 'visibleView', this, '_numberOfStacks', (visibleView, numberOfStacks) => {\n if (numberOfStacks < 2) {\n return '';\n }\n const current = Array.from(this._idToStack.values()).indexOf(this._visibleStack) + 1;\n return t('bn', [\n current,\n numberOfStacks\n ]);\n });\n view.buttonNextView.on('execute', () => {\n // When current view has a focus then move focus to the editable before removing it,\n // otherwise editor will lost focus.\n if (view.focusTracker.isFocused) {\n this.editor.editing.view.focus();\n }\n this._showNextStack();\n });\n view.buttonPrevView.on('execute', () => {\n // When current view has a focus then move focus to the editable before removing it,\n // otherwise editor will lost focus.\n if (view.focusTracker.isFocused) {\n this.editor.editing.view.focus();\n }\n this._showPrevStack();\n });\n return view;\n }\n /**\n\t * @returns {module:ui/view~View}\n\t */\n _createFakePanelsView() {\n const view = new FakePanelsView(this.editor.locale, this.view);\n view.bind('numberOfPanels').to(this, '_numberOfStacks', this, '_singleViewMode', (number, isSingleViewMode) => {\n const showPanels = !isSingleViewMode && number >= 2;\n return showPanels ? Math.min(number - 1, 2) : 0;\n });\n view.listenTo(this.view, 'change:top', () => view.updatePosition());\n view.listenTo(this.view, 'change:left', () => view.updatePosition());\n this.editor.ui.view.body.add(view);\n return view;\n }\n /**\n\t * Sets the view as the content of the balloon and attaches the balloon using position\n\t * options of the first view.\n\t *\n\t * @private\n\t * @param {Object} data Configuration.\n\t * @param {module:ui/view~View} [data.view] The view to show in the balloon.\n\t * @param {String} [data.balloonClassName=''] Additional class name which will be added to the {@link #view balloon}.\n\t * @param {Boolean} [data.withArrow=true] Whether the {@link #view balloon} should be rendered with an arrow.\n\t */\n _showView({view, balloonClassName = '', withArrow = true, singleViewMode = false}) {\n this.view.class = balloonClassName;\n this.view.withArrow = withArrow;\n this._rotatorView.showView(view);\n this.visibleView = view;\n this.view.pin(this._getBalloonPosition());\n this._fakePanelsView.updatePosition();\n if (singleViewMode) {\n this._singleViewMode = true;\n }\n }\n /**\n\t * Returns position options of the last view in the stack.\n\t * This keeps the balloon in the same position when the view is changed.\n\t *\n\t * @private\n\t * @returns {module:utils/dom/position~Options}\n\t */\n _getBalloonPosition() {\n let position = Array.from(this._visibleStack.values()).pop().position;\n // Use the default limiter if none has been specified.\n if (position && !position.limiter) {\n // Don't modify the original options object.\n position = Object.assign({}, position, { limiter: this.positionLimiter });\n }\n return position;\n }\n}\n/**\n * Rotator view is a helper class for the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon ContextualBalloon}.\n * It is used for displaying the last view from the current stack and providing navigation buttons for switching stacks.\n * See the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon ContextualBalloon} documentation to learn more.\n *\n * @extends module:ui/view~View\n */\nclass RotatorView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = locale.t;\n const bind = this.bindTemplate;\n /**\n\t\t * Defines whether navigation is visible or not.\n\t\t *\n\t\t * @member {Boolean} #isNavigationVisible\n\t\t */\n this.set('isNavigationVisible', true);\n /**\n\t\t * Used for checking if a view is focused or not.\n\t\t *\n\t\t * @type {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * Navigation button for switching the stack to the previous one.\n\t\t *\n\t\t * @type {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.buttonPrevView = this._createButtonView(t('bo'), prevIcon);\n /**\n\t\t * Navigation button for switching the stack to the next one.\n\t\t *\n\t\t * @type {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.buttonNextView = this._createButtonView(t('bp'), nextIcon);\n /**\n\t\t * A collection of the child views that creates the rotator content.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.content = this.createCollection();\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-balloon-rotator'\n ],\n 'z-index': '-1'\n },\n children: [\n {\n tag: 'div',\n attributes: {\n class: [\n 'ck-balloon-rotator__navigation',\n bind.to('isNavigationVisible', value => value ? '' : 'ck-hidden')\n ]\n },\n children: [\n this.buttonPrevView,\n {\n tag: 'span',\n attributes: { class: ['ck-balloon-rotator__counter'] },\n children: [{ text: bind.to('counter') }]\n },\n this.buttonNextView\n ]\n },\n {\n tag: 'div',\n attributes: { class: 'ck-balloon-rotator__content' },\n children: this.content\n }\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n this.focusTracker.add(this.element);\n }\n /**\n\t * Shows a given view.\n\t *\n\t * @param {module:ui/view~View} view The view to show.\n\t */\n showView(view) {\n this.hideView();\n this.content.add(view);\n }\n /**\n\t * Hides the currently displayed view.\n\t */\n hideView() {\n this.content.clear();\n }\n /**\n\t * Creates a navigation button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @returns {module:ui/button/buttonview~ButtonView}\n\t */\n _createButtonView(label, icon) {\n const view = new ButtonView(this.locale);\n view.set({\n label,\n icon,\n tooltip: true\n });\n return view;\n }\n}\n// Displays additional layers under the balloon when multiple stacks are added to the balloon.\n//\n// @private\n// @extends module:ui/view~View\nclass FakePanelsView extends View {\n // @inheritDoc\n constructor(locale, balloonPanelView) {\n super(locale);\n const bind = this.bindTemplate;\n // Fake panels top offset.\n //\n // @observable\n // @member {Number} #top\n this.set('top', 0);\n // Fake panels left offset.\n //\n // @observable\n // @member {Number} #left\n this.set('left', 0);\n // Fake panels height.\n //\n // @observable\n // @member {Number} #height\n this.set('height', 0);\n // Fake panels width.\n //\n // @observable\n // @member {Number} #width\n this.set('width', 0);\n // Number of rendered fake panels.\n //\n // @observable\n // @member {Number} #numberOfPanels\n this.set('numberOfPanels', 0);\n // Collection of the child views which creates fake panel content.\n //\n // @readonly\n // @type {module:ui/viewcollection~ViewCollection}\n this.content = this.createCollection();\n // Context.\n //\n // @private\n // @type {module:ui/panel/balloon/balloonpanelview~BalloonPanelView}\n this._balloonPanelView = balloonPanelView;\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck-fake-panel',\n bind.to('numberOfPanels', number => number ? '' : 'ck-hidden')\n ],\n style: {\n top: bind.to('top', toPx),\n left: bind.to('left', toPx),\n width: bind.to('width', toPx),\n height: bind.to('height', toPx)\n }\n },\n children: this.content\n });\n this.on('change:numberOfPanels', (evt, name, next, prev) => {\n if (next > prev) {\n this._addPanels(next - prev);\n } else {\n this._removePanels(prev - next);\n }\n this.updatePosition();\n });\n }\n // @private\n // @param {Number} number\n _addPanels(number) {\n while (number--) {\n const view = new View();\n view.setTemplate({ tag: 'div' });\n this.content.add(view);\n this.registerChild(view);\n }\n }\n // @private\n // @param {Number} number\n _removePanels(number) {\n while (number--) {\n const view = this.content.last;\n this.content.remove(view);\n this.deregisterChild(view);\n view.destroy();\n }\n }\n // Updates coordinates of fake panels.\n updatePosition() {\n if (this.numberOfPanels) {\n const {top, left} = this._balloonPanelView;\n const {width, height} = new Rect(this._balloonPanelView.element);\n Object.assign(this, {\n top,\n left,\n width,\n height\n });\n }\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image/ui/utils\n */\n\nimport BalloonPanelView from '@ckeditor/ckeditor5-ui/src/panel/balloon/balloonpanelview';\nimport { getSelectedImageWidget } from '../utils';\n\n/**\n * A helper utility that positions the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} instance\n * with respect to the image in the editor content, if one is selected.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n */\nexport function repositionContextualBalloon( editor ) {\n\tconst balloon = editor.plugins.get( 'ContextualBalloon' );\n\n\tif ( getSelectedImageWidget( editor.editing.view.document.selection ) ) {\n\t\tconst position = getBalloonPositionData( editor );\n\n\t\tballoon.updatePosition( position );\n\t}\n}\n\n/**\n * Returns the positioning options that control the geometry of the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} with respect\n * to the selected element in the editor content.\n *\n * @param {module:core/editor/editor~Editor} editor The editor instance.\n * @returns {module:utils/dom/position~Options}\n */\nexport function getBalloonPositionData( editor ) {\n\tconst editingView = editor.editing.view;\n\tconst defaultPositions = BalloonPanelView.defaultPositions;\n\n\treturn {\n\t\ttarget: editingView.domConverter.viewToDom( editingView.document.selection.getSelectedElement() ),\n\t\tpositions: [\n\t\t\tdefaultPositions.northArrowSouth,\n\t\t\tdefaultPositions.northArrowSouthWest,\n\t\t\tdefaultPositions.northArrowSouthEast,\n\t\t\tdefaultPositions.southArrowNorth,\n\t\t\tdefaultPositions.southArrowNorthWest,\n\t\t\tdefaultPositions.southArrowNorthEast\n\t\t]\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetextalternative/imagetextalternativeui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport clickOutsideHandler from '@ckeditor/ckeditor5-ui/src/bindings/clickoutsidehandler';\nimport TextAlternativeFormView from './ui/textalternativeformview';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport textAlternativeIcon from '@ckeditor/ckeditor5-core/theme/icons/low-vision.svg';\nimport {\n repositionContextualBalloon,\n getBalloonPositionData\n} from '../image/ui/utils';\nimport { getSelectedImageWidget } from '../image/utils';\n/**\n * The image text alternative UI plugin.\n *\n * The plugin uses the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternativeUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageTextAlternativeUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n this._createButton();\n this._createForm();\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n super.destroy();\n // Destroy created UI components as they are not automatically destroyed (see ckeditor5#1341).\n this._form.destroy();\n }\n /**\n\t * Creates a button showing the balloon panel for changing the image text alternative and\n\t * registers it in the editor {@link module:ui/componentfactory~ComponentFactory ComponentFactory}.\n\t *\n\t * @private\n\t */\n _createButton() {\n const editor = this.editor;\n const t = editor.t;\n editor.ui.componentFactory.add('imageTextAlternative', locale => {\n const command = editor.commands.get('imageTextAlternative');\n const view = new ButtonView(locale);\n view.set({\n label: t('bv'),\n icon: textAlternativeIcon,\n tooltip: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n this.listenTo(view, 'execute', () => this._showForm());\n return view;\n });\n }\n /**\n\t * Creates the {@link module:image/imagetextalternative/ui/textalternativeformview~TextAlternativeFormView}\n\t * form.\n\t *\n\t * @private\n\t */\n _createForm() {\n const editor = this.editor;\n const view = editor.editing.view;\n const viewDocument = view.document;\n /**\n\t\t * The contextual balloon plugin instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:ui/panel/balloon/contextualballoon~ContextualBalloon}\n\t\t */\n this._balloon = this.editor.plugins.get('ContextualBalloon');\n /**\n\t\t * A form containing a textarea and buttons, used to change the `alt` text value.\n\t\t *\n\t\t * @member {module:image/imagetextalternative/ui/textalternativeformview~TextAlternativeFormView}\n\t\t */\n this._form = new TextAlternativeFormView(editor.locale);\n // Render the form so its #element is available for clickOutsideHandler.\n this._form.render();\n this.listenTo(this._form, 'submit', () => {\n editor.execute('imageTextAlternative', { newValue: this._form.labeledInput.inputView.element.value });\n this._hideForm(true);\n });\n this.listenTo(this._form, 'cancel', () => {\n this._hideForm(true);\n });\n // Close the form on Esc key press.\n this._form.keystrokes.set('Esc', (data, cancel) => {\n this._hideForm(true);\n cancel();\n });\n // Reposition the balloon or hide the form if an image widget is no longer selected.\n this.listenTo(editor.ui, 'update', () => {\n if (!getSelectedImageWidget(viewDocument.selection)) {\n this._hideForm(true);\n } else if (this._isVisible) {\n repositionContextualBalloon(editor);\n }\n });\n // Close on click outside of balloon panel element.\n clickOutsideHandler({\n emitter: this._form,\n activator: () => this._isVisible,\n contextElements: [this._balloon.view.element],\n callback: () => this._hideForm()\n });\n }\n /**\n\t * Shows the {@link #_form} in the {@link #_balloon}.\n\t *\n\t * @private\n\t */\n _showForm() {\n if (this._isVisible) {\n return;\n }\n const editor = this.editor;\n const command = editor.commands.get('imageTextAlternative');\n const labeledInput = this._form.labeledInput;\n if (!this._isInBalloon) {\n this._balloon.add({\n view: this._form,\n position: getBalloonPositionData(editor)\n });\n }\n // Make sure that each time the panel shows up, the field remains in sync with the value of\n // the command. If the user typed in the input, then canceled the balloon (`labeledInput#value`\n // stays unaltered) and re-opened it without changing the value of the command, they would see the\n // old value instead of the actual value of the command.\n // https://github.com/ckeditor/ckeditor5-image/issues/114\n labeledInput.value = labeledInput.inputView.element.value = command.value || '';\n this._form.labeledInput.select();\n }\n /**\n\t * Removes the {@link #_form} from the {@link #_balloon}.\n\t *\n\t * @param {Boolean} [focusEditable=false] Controls whether the editing view is focused afterwards.\n\t * @private\n\t */\n _hideForm(focusEditable) {\n if (!this._isInBalloon) {\n return;\n }\n // Blur the input element before removing it from DOM to prevent issues in some browsers.\n // See https://github.com/ckeditor/ckeditor5/issues/1501.\n if (this._form.focusTracker.isFocused) {\n this._form.saveButtonView.focus();\n }\n this._balloon.remove(this._form);\n if (focusEditable) {\n this.editor.editing.view.focus();\n }\n }\n /**\n\t * Returns `true` when the {@link #_form} is the visible view in the {@link #_balloon}.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _isVisible() {\n return this._balloon.visibleView === this._form;\n }\n /**\n\t * Returns `true` when the {@link #_form} is in the {@link #_balloon}.\n\t *\n\t * @private\n\t * @type {Boolean}\n\t */\n get _isInBalloon() {\n return this._balloon.hasView(this._form);\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M5.085 6.22L2.943 4.078a.75.75 0 1 1 1.06-1.06l2.592 2.59A11.094 11.094 0 0 1 10 5.068c4.738 0 8.578 3.101 8.578 5.083 0 1.197-1.401 2.803-3.555 3.887l1.714 1.713a.75.75 0 0 1-.09 1.138.488.488 0 0 1-.15.084.75.75 0 0 1-.821-.16L6.17 7.304c-.258.11-.51.233-.757.365l6.239 6.24-.006.005.78.78c-.388.094-.78.166-1.174.215l-1.11-1.11h.011L4.55 8.197a7.2 7.2 0 0 0-.665.514l-.112.098 4.897 4.897-.005.006 1.276 1.276a10.164 10.164 0 0 1-1.477-.117l-.479-.479-.009.009-4.863-4.863-.022.031a2.563 2.563 0 0 0-.124.2c-.043.077-.08.158-.108.241a.534.534 0 0 0-.028.133.29.29 0 0 0 .008.072.927.927 0 0 0 .082.226c.067.133.145.26.234.379l3.242 3.365.025.01.59.623c-3.265-.918-5.59-3.155-5.59-4.668 0-1.194 1.448-2.838 3.663-3.93zm7.07.531a4.632 4.632 0 0 1 1.108 5.992l.345.344.046-.018a9.313 9.313 0 0 0 2-1.112c.256-.187.5-.392.727-.613.137-.134.27-.277.392-.431.072-.091.141-.185.203-.286.057-.093.107-.19.148-.292a.72.72 0 0 0 .036-.12.29.29 0 0 0 .008-.072.492.492 0 0 0-.028-.133.999.999 0 0 0-.036-.096 2.165 2.165 0 0 0-.071-.145 2.917 2.917 0 0 0-.125-.2 3.592 3.592 0 0 0-.263-.335 5.444 5.444 0 0 0-.53-.523 7.955 7.955 0 0 0-1.054-.768 9.766 9.766 0 0 0-1.879-.891c-.337-.118-.68-.219-1.027-.301zm-2.85.21l-.069.002a.508.508 0 0 0-.254.097.496.496 0 0 0-.104.679.498.498 0 0 0 .326.199l.045.005c.091.003.181.003.272.012a2.45 2.45 0 0 1 2.017 1.513c.024.061.043.125.069.185a.494.494 0 0 0 .45.287h.008a.496.496 0 0 0 .35-.158.482.482 0 0 0 .13-.335.638.638 0 0 0-.048-.219 3.379 3.379 0 0 0-.36-.723 3.438 3.438 0 0 0-2.791-1.543l-.028-.001h-.013z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagetextalternative\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageTextAlternativeEditing from './imagetextalternative/imagetextalternativeediting';\nimport ImageTextAlternativeUI from './imagetextalternative/imagetextalternativeui';\n\n/**\n * The image text alternative plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-styles image styles} documentation.\n *\n * This is a \"glue\" plugin which loads the\n * {@link module:image/imagetextalternative/imagetextalternativeediting~ImageTextAlternativeEditing}\n * and {@link module:image/imagetextalternative/imagetextalternativeui~ImageTextAlternativeUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageTextAlternative extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageTextAlternativeEditing, ImageTextAlternativeUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageTextAlternative';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/image\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageEditing from '../src/image/imageediting';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\nimport ImageTextAlternative from './imagetextalternative';\n\nimport '../theme/image.css';\n\n/**\n * The image plugin.\n *\n * For a detailed overview, check the {@glink features/image image feature} documentation.\n *\n * This is a \"glue\" plugin which loads the following plugins:\n *\n * * {@link module:image/image/imageediting~ImageEditing},\n * * {@link module:image/imagetextalternative~ImageTextAlternative}.\n *\n * Usually, it is used in conjuction with other plugins from this package. See the {@glink api/image package page}\n * for more information.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Image extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageEditing, Widget, ImageTextAlternative ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Image';\n\t}\n}\n\n/**\n * The configuration of the image features. Used by the image features in the `@ckeditor/ckeditor5-image` package.\n *\n * Read more in {@link module:image/image~ImageConfig}.\n *\n * @member {module:image/image~ImageConfig} module:core/editor/editorconfig~EditorConfig#image\n */\n\n/**\n * The configuration of the image features. Used by the image features in the `@ckeditor/ckeditor5-image` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\timage: ... // Image feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface ImageConfig\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module upload/ui/filedialogbuttonview\n */\n\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport View from '@ckeditor/ckeditor5-ui/src/view';\n\n/**\n * The file dialog button view.\n *\n * This component provides a button that opens the native file selection dialog.\n * It can be used to implement the UI of a file upload feature.\n *\n *\t\tconst view = new FileDialogButtonView( locale );\n *\n *\t\tview.set( {\n *\t\t\tacceptedType: 'image/*',\n *\t\t\tallowMultipleFiles: true\n *\t\t} );\n *\n *\t\tview.buttonView.set( {\n *\t\t\tlabel: t( 'Insert image' ),\n *\t\t\ticon: imageIcon,\n *\t\t\ttooltip: true\n *\t\t} );\n *\n *\t\tview.on( 'done', ( evt, files ) => {\n *\t\t\tfor ( const file of Array.from( files ) ) {\n *\t\t\t\tconsole.log( 'Selected file', file );\n *\t\t\t}\n *\t\t} );\n *\n * @extends module:ui/view~View\n */\nexport default class FileDialogButtonView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The button view of the component.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n\t\tthis.buttonView = new ButtonView( locale );\n\n\t\t/**\n\t\t * A hidden `<input>` view used to execute file dialog.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:upload/ui/filedialogbuttonview~FileInputView}\n\t\t */\n\t\tthis._fileInputView = new FileInputView( locale );\n\n\t\t/**\n\t\t * Accepted file types. Can be provided in form of file extensions, media type or one of:\n\t\t * * `audio/*`,\n\t\t * * `video/*`,\n\t\t * * `image/*`.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #acceptedType\n\t\t */\n\t\tthis._fileInputView.bind( 'acceptedType' ).to( this );\n\n\t\t/**\n\t\t * Indicates if multiple files can be selected. Defaults to `true`.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #allowMultipleFiles\n\t\t */\n\t\tthis._fileInputView.bind( 'allowMultipleFiles' ).to( this );\n\n\t\t/**\n\t\t * Fired when file dialog is closed with file selected.\n\t\t *\n\t\t *\t\tview.on( 'done', ( evt, files ) => {\n\t\t *\t\t\tfor ( const file of files ) {\n\t\t *\t\t\t\tconsole.log( 'Selected file', file );\n\t\t *\t\t\t}\n\t\t *\t\t}\n\t\t *\n\t\t * @event done\n\t\t * @param {Array.<File>} files Array of selected files.\n\t\t */\n\t\tthis._fileInputView.delegate( 'done' ).to( this );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'span',\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck-file-dialog-button',\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\tthis.buttonView,\n\t\t\t\tthis._fileInputView\n\t\t\t]\n\t\t} );\n\n\t\tthis.buttonView.on( 'execute', () => {\n\t\t\tthis._fileInputView.open();\n\t\t} );\n\t}\n\n\t/**\n\t * Focuses the {@link #buttonView}.\n\t */\n\tfocus() {\n\t\tthis.buttonView.focus();\n\t}\n}\n\n/**\n * The hidden file input view class.\n *\n * @private\n * @extends module:ui/view~View\n */\nclass FileInputView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * Accepted file types. Can be provided in form of file extensions, media type or one of:\n\t\t * * `audio/*`,\n\t\t * * `video/*`,\n\t\t * * `image/*`.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #acceptedType\n\t\t */\n\t\tthis.set( 'acceptedType' );\n\n\t\t/**\n\t\t * Indicates if multiple files can be selected. Defaults to `false`.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #allowMultipleFiles\n\t\t */\n\t\tthis.set( 'allowMultipleFiles', false );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'input',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-hidden'\n\t\t\t\t],\n\t\t\t\ttype: 'file',\n\t\t\t\ttabindex: '-1',\n\t\t\t\taccept: bind.to( 'acceptedType' ),\n\t\t\t\tmultiple: bind.to( 'allowMultipleFiles' )\n\t\t\t},\n\n\t\t\ton: {\n\t\t\t\t// Removing from code coverage since we cannot programmatically set input element files.\n\t\t\t\tchange: bind.to( /* istanbul ignore next */ () => {\n\t\t\t\t\tif ( this.element && this.element.files && this.element.files.length ) {\n\t\t\t\t\t\tthis.fire( 'done', this.element.files );\n\t\t\t\t\t}\n\n\t\t\t\t\tthis.element.value = '';\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Opens file dialog.\n\t */\n\topen() {\n\t\tthis.element.click();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload/utils\n */\n\n/* global fetch, File */\n\n/**\n * Creates a regular expression used to test for image files.\n *\n *\t\tconst imageType = createImageTypeRegExp( [ 'png', 'jpeg', 'svg+xml', 'vnd.microsoft.icon' ] );\n *\n *\t\tconsole.log( 'is supported image', imageType.test( file.type ) );\n *\n * @param {Array.<String>} types\n * @returns {RegExp}\n */\nexport function createImageTypeRegExp( types ) {\n\t// Sanitize the MIME type name which may include: \"+\", \"-\" or \".\".\n\tconst regExpSafeNames = types.map( type => type.replace( '+', '\\\\+' ) );\n\n\treturn new RegExp( `^image\\\\/(${ regExpSafeNames.join( '|' ) })$` );\n}\n\n/**\n * Creates a promise that fetches the image local source (Base64 or blob) and resolves with a `File` object.\n *\n * @param {module:engine/view/element~Element} image Image whose source to fetch.\n * @returns {Promise.<File>} A promise which resolves when an image source is fetched and converted to a `File` instance.\n * It resolves with a `File` object. If there were any errors during file processing, the promise will be rejected.\n */\nexport function fetchLocalImage( image ) {\n\treturn new Promise( ( resolve, reject ) => {\n\t\tconst imageSrc = image.getAttribute( 'src' );\n\n\t\t// Fetch works asynchronously and so does not block browser UI when processing data.\n\t\tfetch( imageSrc )\n\t\t\t.then( resource => resource.blob() )\n\t\t\t.then( blob => {\n\t\t\t\tconst mimeType = getImageMimeType( blob, imageSrc );\n\t\t\t\tconst ext = mimeType.replace( 'image/', '' );\n\t\t\t\tconst filename = `image.${ ext }`;\n\t\t\t\tconst file = createFileFromBlob( blob, filename, mimeType );\n\n\t\t\t\tfile ? resolve( file ) : reject();\n\t\t\t} )\n\t\t\t.catch( reject );\n\t} );\n}\n\n/**\n * Checks whether a given node is an image element with a local source (Base64 or blob).\n *\n * @param {module:engine/view/node~Node} node The node to check.\n * @returns {Boolean}\n */\nexport function isLocalImage( node ) {\n\tif ( !node.is( 'element', 'img' ) || !node.getAttribute( 'src' ) ) {\n\t\treturn false;\n\t}\n\n\treturn node.getAttribute( 'src' ).match( /^data:image\\/\\w+;base64,/g ) ||\n\t\tnode.getAttribute( 'src' ).match( /^blob:/g );\n}\n\n// Extracts an image type based on its blob representation or its source.\n//\n// @param {String} src Image `src` attribute value.\n// @param {Blob} blob Image blob representation.\n// @returns {String}\nfunction getImageMimeType( blob, src ) {\n\tif ( blob.type ) {\n\t\treturn blob.type;\n\t} else if ( src.match( /data:(image\\/\\w+);base64/ ) ) {\n\t\treturn src.match( /data:(image\\/\\w+);base64/ )[ 1 ].toLowerCase();\n\t} else {\n\t\t// Fallback to 'jpeg' as common extension.\n\t\treturn 'image/jpeg';\n\t}\n}\n\n// Creates a `File` instance from the given `Blob` instance using the specified file name.\n//\n// @param {Blob} blob The `Blob` instance from which the file will be created.\n// @param {String} filename The file name used during the file creation.\n// @param {String} mimeType The file MIME type.\n// @returns {File|null} The `File` instance created from the given blob or `null` if `File API` is not available.\nfunction createFileFromBlob( blob, filename, mimeType ) {\n\ttry {\n\t\treturn new File( [ blob ], filename, { type: mimeType } );\n\t} catch ( err ) {\n\t\t// Edge does not support `File` constructor ATM, see https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/9551546/.\n\t\t// However, the `File` function is present (so cannot be checked with `!window.File` or `typeof File === 'function'`), but\n\t\t// calling it with `new File( ... )` throws an error. This try-catch prevents that. Also when the function will\n\t\t// be implemented correctly in Edge the code will start working without any changes (see #247).\n\t\treturn null;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imageupload/imageuploadui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileDialogButtonView from '@ckeditor/ckeditor5-upload/src/ui/filedialogbuttonview';\nimport imageIcon from '@ckeditor/ckeditor5-core/theme/icons/image.svg';\nimport { createImageTypeRegExp } from './utils';\n/**\n * The image upload button plugin.\n *\n * For a detailed overview, check the {@glink features/image-upload/image-upload Image upload feature} documentation.\n *\n * Adds the `'imageUpload'` button to the {@link module:ui/componentfactory~ComponentFactory UI component factory}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n // Setup `imageUpload` button.\n editor.ui.componentFactory.add('imageUpload', locale => {\n const view = new FileDialogButtonView(locale);\n const command = editor.commands.get('imageUpload');\n const imageTypes = editor.config.get('image.upload.types');\n const imageTypesRegExp = createImageTypeRegExp(imageTypes);\n view.set({\n acceptedType: imageTypes.map(type => `image/${ type }`).join(','),\n allowMultipleFiles: true\n });\n view.buttonView.set({\n label: t('j'),\n icon: imageIcon,\n tooltip: true\n });\n view.buttonView.bind('isEnabled').to(command);\n view.on('done', (evt, files) => {\n const imagesToUpload = Array.from(files).filter(file => imageTypesRegExp.test(file.type));\n if (imagesToUpload.length) {\n editor.execute('imageUpload', { file: imagesToUpload });\n }\n });\n return view;\n });\n }\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M6.91 10.54c.26-.23.64-.21.88.03l3.36 3.14 2.23-2.06a.64.64 0 0 1 .87 0l2.52 2.97V4.5H3.2v10.12l3.71-4.08zm10.27-7.51c.6 0 1.09.47 1.09 1.05v11.84c0 .59-.49 1.06-1.09 1.06H2.79c-.6 0-1.09-.47-1.09-1.06V4.08c0-.58.49-1.05 1.1-1.05h14.38zm-5.22 5.56a1.96 1.96 0 1 1 3.4-1.96 1.96 1.96 0 0 1-3.4 1.96z\\\"/></svg>\"","export default \"<svg xmlns=\\\"http://www.w3.org/2000/svg\\\" viewBox=\\\"0 0 700 250\\\"><rect rx=\\\"4\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload/imageuploadprogress\n */\n\n/* globals setTimeout */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport uploadingPlaceholder from '../../theme/icons/image_placeholder.svg';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\nimport '../../theme/imageuploadprogress.css';\nimport '../../theme/imageuploadicon.css';\nimport '../../theme/imageuploadloader.css';\n\n/**\n * The image upload progress plugin.\n * It shows a placeholder when the image is read from the disk and a progress bar while the image is uploading.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadProgress extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The image placeholder that is displayed before real image data can be accessed.\n\t\t *\n\t\t * @protected\n\t\t * @member {String} #placeholder\n\t\t */\n\t\tthis.placeholder = 'data:image/svg+xml;utf8,' + encodeURIComponent( uploadingPlaceholder );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Upload status change - update image's view according to that status.\n\t\teditor.editing.downcastDispatcher.on( 'attribute:uploadStatus:image', ( ...args ) => this.uploadStatusChange( ...args ) );\n\t}\n\n\t/**\n\t * This method is called each time the image `uploadStatus` attribute is changed.\n\t *\n\t * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n\t * @param {Object} data Additional information about the change.\n\t * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n\t */\n\tuploadStatusChange( evt, data, conversionApi ) {\n\t\tconst editor = this.editor;\n\t\tconst modelImage = data.item;\n\t\tconst uploadId = modelImage.getAttribute( 'uploadId' );\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst fileRepository = editor.plugins.get( FileRepository );\n\t\tconst status = uploadId ? data.attributeNewValue : null;\n\t\tconst placeholder = this.placeholder;\n\t\tconst viewFigure = editor.editing.mapper.toViewElement( modelImage );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\tif ( status == 'reading' ) {\n\t\t\t// Start \"appearing\" effect and show placeholder with infinite progress bar on the top\n\t\t\t// while image is read from disk.\n\t\t\t_startAppearEffect( viewFigure, viewWriter );\n\t\t\t_showPlaceholder( placeholder, viewFigure, viewWriter );\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Show progress bar on the top of the image when image is uploading.\n\t\tif ( status == 'uploading' ) {\n\t\t\tconst loader = fileRepository.loaders.get( uploadId );\n\n\t\t\t// Start appear effect if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.\n\t\t\t_startAppearEffect( viewFigure, viewWriter );\n\n\t\t\tif ( !loader ) {\n\t\t\t\t// There is no loader associated with uploadId - this means that image came from external changes.\n\t\t\t\t// In such cases we still want to show the placeholder until image is fully uploaded.\n\t\t\t\t// Show placeholder if needed - see https://github.com/ckeditor/ckeditor5-image/issues/191.\n\t\t\t\t_showPlaceholder( placeholder, viewFigure, viewWriter );\n\t\t\t} else {\n\t\t\t\t// Hide placeholder and initialize progress bar showing upload progress.\n\t\t\t\t_hidePlaceholder( viewFigure, viewWriter );\n\t\t\t\t_showProgressBar( viewFigure, viewWriter, loader, editor.editing.view );\n\t\t\t\t_displayLocalImage( viewFigure, viewWriter, loader );\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\t// Because in Edge there is no way to show fancy animation of completeIcon we need to skip it.\n\t\tif ( status == 'complete' && fileRepository.loaders.get( uploadId ) && !env.isEdge ) {\n\t\t\t_showCompleteIcon( viewFigure, viewWriter, editor.editing.view );\n\t\t}\n\n\t\t// Clean up.\n\t\t_hideProgressBar( viewFigure, viewWriter );\n\t\t_hidePlaceholder( viewFigure, viewWriter );\n\t\t_stopAppearEffect( viewFigure, viewWriter );\n\t}\n}\n\n// Adds ck-appear class to the image figure if one is not already applied.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _startAppearEffect( viewFigure, writer ) {\n\tif ( !viewFigure.hasClass( 'ck-appear' ) ) {\n\t\twriter.addClass( 'ck-appear', viewFigure );\n\t}\n}\n\n// Removes ck-appear class to the image figure if one is not already removed.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _stopAppearEffect( viewFigure, writer ) {\n\twriter.removeClass( 'ck-appear', viewFigure );\n}\n\n// Shows placeholder together with infinite progress bar on given image figure.\n//\n// @param {String} Data-uri with a svg placeholder.\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _showPlaceholder( placeholder, viewFigure, writer ) {\n\tif ( !viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {\n\t\twriter.addClass( 'ck-image-upload-placeholder', viewFigure );\n\t}\n\n\tconst viewImg = viewFigure.getChild( 0 );\n\n\tif ( viewImg.getAttribute( 'src' ) !== placeholder ) {\n\t\twriter.setAttribute( 'src', placeholder, viewImg );\n\t}\n\n\tif ( !_getUIElement( viewFigure, 'placeholder' ) ) {\n\t\twriter.insert( writer.createPositionAfter( viewImg ), _createPlaceholder( writer ) );\n\t}\n}\n\n// Removes placeholder together with infinite progress bar on given image figure.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _hidePlaceholder( viewFigure, writer ) {\n\tif ( viewFigure.hasClass( 'ck-image-upload-placeholder' ) ) {\n\t\twriter.removeClass( 'ck-image-upload-placeholder', viewFigure );\n\t}\n\n\t_removeUIElement( viewFigure, writer, 'placeholder' );\n}\n\n// Shows progress bar displaying upload progress.\n// Attaches it to the file loader to update when upload percentace is changed.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:upload/filerepository~FileLoader} loader\n// @param {module:engine/view/view~View} view\nfunction _showProgressBar( viewFigure, writer, loader, view ) {\n\tconst progressBar = _createProgressBar( writer );\n\twriter.insert( writer.createPositionAt( viewFigure, 'end' ), progressBar );\n\n\t// Update progress bar width when uploadedPercent is changed.\n\tloader.on( 'change:uploadedPercent', ( evt, name, value ) => {\n\t\tview.change( writer => {\n\t\t\twriter.setStyle( 'width', value + '%', progressBar );\n\t\t} );\n\t} );\n}\n\n// Hides upload progress bar.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\nfunction _hideProgressBar( viewFigure, writer ) {\n\t_removeUIElement( viewFigure, writer, 'progressBar' );\n}\n\n// Shows complete icon and hides after a certain amount of time.\n//\n// @param {module:engine/view/containerelement~ContainerElement} viewFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:engine/view/view~View} view\nfunction _showCompleteIcon( viewFigure, writer, view ) {\n\tconst completeIcon = writer.createUIElement( 'div', { class: 'ck-image-upload-complete-icon' } );\n\n\twriter.insert( writer.createPositionAt( viewFigure, 'end' ), completeIcon );\n\n\tsetTimeout( () => {\n\t\tview.change( writer => writer.remove( writer.createRangeOn( completeIcon ) ) );\n\t}, 3000 );\n}\n\n// Create progress bar element using {@link module:engine/view/uielement~UIElement}.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/uielement~UIElement}\nfunction _createProgressBar( writer ) {\n\tconst progressBar = writer.createUIElement( 'div', { class: 'ck-progress-bar' } );\n\n\twriter.setCustomProperty( 'progressBar', true, progressBar );\n\n\treturn progressBar;\n}\n\n// Create placeholder element using {@link module:engine/view/uielement~UIElement}.\n//\n// @private\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @returns {module:engine/view/uielement~UIElement}\nfunction _createPlaceholder( writer ) {\n\tconst placeholder = writer.createUIElement( 'div', { class: 'ck-upload-placeholder-loader' } );\n\n\twriter.setCustomProperty( 'placeholder', true, placeholder );\n\n\treturn placeholder;\n}\n\n// Returns {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.\n// Returns `undefined` if element is not found.\n//\n// @private\n// @param {module:engine/view/element~Element} imageFigure\n// @param {String} uniqueProperty\n// @returns {module:engine/view/uielement~UIElement|undefined}\nfunction _getUIElement( imageFigure, uniqueProperty ) {\n\tfor ( const child of imageFigure.getChildren() ) {\n\t\tif ( child.getCustomProperty( uniqueProperty ) ) {\n\t\t\treturn child;\n\t\t}\n\t}\n}\n\n// Removes {@link module:engine/view/uielement~UIElement} of given unique property from image figure element.\n//\n// @private\n// @param {module:engine/view/element~Element} imageFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {String} uniqueProperty\nfunction _removeUIElement( viewFigure, writer, uniqueProperty ) {\n\tconst element = _getUIElement( viewFigure, uniqueProperty );\n\n\tif ( element ) {\n\t\twriter.remove( writer.createRangeOn( element ) );\n\t}\n}\n\n// Displays local data from file loader.\n//\n// @param {module:engine/view/element~Element} imageFigure\n// @param {module:engine/view/downcastwriter~DowncastWriter} writer\n// @param {module:upload/filerepository~FileLoader} loader\nfunction _displayLocalImage( viewFigure, writer, loader ) {\n\tif ( loader.data ) {\n\t\tconst viewImg = viewFigure.getChild( 0 );\n\n\t\twriter.setAttribute( 'src', loader.data, viewImg );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module module:engine/view/upcastwriter\n */\n\nimport DocumentFragment from './documentfragment';\nimport Element from './element';\nimport Text from './text';\nimport { isPlainObject } from 'lodash-es';\nimport Position from './position';\nimport Range from './range';\nimport Selection from './selection';\n\n/**\n * View upcast writer. It provides a set of methods used to manipulate non-semantic view trees.\n *\n * It should be used only while working on a non-semantic view\n * (e.g. a view created from HTML string on paste).\n * To manipulate a view which was or is being downcasted from the the model use the\n * {@link module:engine/view/downcastwriter~DowncastWriter downcast writer}.\n *\n * Read more about changing the view in the {@glink framework/guides/architecture/editing-engine#changing-the-view Changing the view}\n * section of the {@glink framework/guides/architecture/editing-engine Editing engine architecture} guide.\n *\n * Unlike `DowncastWriter`, which is available in the {@link module:engine/view/view~View#change `View#change()`} block,\n * `UpcastWriter` can be created wherever you need it:\n *\n *\t\tconst writer = new UpcastWriter();\n *\t\tconst text = writer.createText( 'foo!' );\n *\n *\t\twriter.appendChild( text, someViewElement );\n */\nexport default class UpcastWriter {\n\t/**\n\t * Creates a new {@link module:engine/view/documentfragment~DocumentFragment} instance.\n\t *\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into the created document fragment.\n\t * @returns {module:engine/view/documentfragment~DocumentFragment} The created document fragment.\n\t */\n\tcreateDocumentFragment( children ) {\n\t\treturn new DocumentFragment( children );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/element~Element} instance.\n\t *\n\t * Attributes can be passed in various formats:\n\t *\n\t *\t\tupcastWriter.createElement( 'div', { class: 'editor', contentEditable: 'true' } ); // object\n\t *\t\tupcastWriter.createElement( 'div', [ [ 'class', 'editor' ], [ 'contentEditable', 'true' ] ] ); // map-like iterator\n\t *\t\tupcastWriter.createElement( 'div', mapOfAttributes ); // map\n\t *\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attrs] Collection of attributes.\n\t * @param {module:engine/view/node~Node|Iterable.<module:engine/view/node~Node>} [children]\n\t * A list of nodes to be inserted into created element.\n\t * @returns {module:engine/view/element~Element} Created element.\n\t */\n\tcreateElement( name, attrs, children ) {\n\t\treturn new Element( name, attrs, children );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/text~Text} instance.\n\t *\n\t * @param {String} data The text's data.\n\t * @returns {module:engine/view/text~Text} The created text node.\n\t */\n\tcreateText( data ) {\n\t\treturn new Text( data );\n\t}\n\n\t/**\n\t * Clones the provided element.\n\t *\n\t * @see module:engine/view/element~Element#_clone\n\t * @param {module:engine/view/element~Element} element Element to be cloned.\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/element~Element} Clone of this element.\n\t */\n\tclone( element, deep = false ) {\n\t\treturn element._clone( deep );\n\t}\n\n\t/**\n\t * Appends a child node or a list of child nodes at the end of this node\n\t * and sets the parent of these nodes to this element.\n\t *\n\t * @see module:engine/view/element~Element#_appendChild\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * to which items will be appended.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Number} Number of appended nodes.\n\t */\n\tappendChild( items, element ) {\n\t\treturn element._appendChild( items );\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this element.\n\t *\n\t * @see module:engine/view/element~Element#_insertChild\n\t * @param {Number} index Offset at which nodes should be inserted.\n\t * @param {module:engine/view/item~Item|Iterable.<module:engine/view/item~Item>} items Items to be inserted.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * to which items will be inserted.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\tinsertChild( index, items, element ) {\n\t\treturn element._insertChild( index, items );\n\t}\n\n\t/**\n\t * Removes the given number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @see module:engine/view/element~Element#_removeChildren\n\t * @param {Number} index Offset from which nodes will be removed.\n\t * @param {Number} howMany Number of nodes to remove.\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} element Element\n\t * which children will be removed.\n\t * @fires module:engine/view/node~Node#event:change\n\t * @returns {Array.<module:engine/view/node~Node>} The array containing removed nodes.\n\t */\n\tremoveChildren( index, howMany, element ) {\n\t\treturn element._removeChildren( index, howMany );\n\t}\n\n\t/**\n\t * Removes given element from the view structure. Will not have effect on detached elements.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which will be removed.\n\t * @returns {Array.<module:engine/view/node~Node>} The array containing removed nodes.\n\t */\n\tremove( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( parent ) {\n\t\t\treturn this.removeChildren( parent.getChildIndex( element ), 1, parent );\n\t\t}\n\n\t\treturn [];\n\t}\n\n\t/**\n\t * Replaces given element with the new one in the view structure. Will not have effect on detached elements.\n\t *\n\t * @param {module:engine/view/element~Element} oldElement Element which will be replaced.\n\t * @param {module:engine/view/element~Element} newElement Element which will be inserted in the place of the old element.\n\t * @returns {Boolean} Whether old element was successfully replaced.\n\t */\n\treplace( oldElement, newElement ) {\n\t\tconst parent = oldElement.parent;\n\n\t\tif ( parent ) {\n\t\t\tconst index = parent.getChildIndex( oldElement );\n\n\t\t\tthis.removeChildren( index, 1, parent );\n\t\t\tthis.insertChild( index, newElement, parent );\n\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes given element from view structure and places its children in its position.\n\t * It does nothing if element has no parent.\n\t *\n\t * @param {module:engine/view/element~Element} element Element to unwrap.\n\t */\n\tunwrapElement( element ) {\n\t\tconst parent = element.parent;\n\n\t\tif ( parent ) {\n\t\t\tconst index = parent.getChildIndex( element );\n\n\t\t\tthis.remove( element );\n\t\t\tthis.insertChild( index, element.getChildren(), parent );\n\t\t}\n\t}\n\n\t/**\n\t * Renames element by creating a copy of a given element but with its name changed and then moving contents of the\n\t * old element to the new one.\n\t *\n\t * Since this function creates a new element and removes the given one, the new element is returned to keep reference.\n\t *\n\t * @param {String} newName New element name.\n\t * @param {module:engine/view/element~Element} element Element to be renamed.\n\t * @returns {module:engine/view/element~Element|null} New element or null if the old element\n\t * was not replaced (happens for detached elements).\n\t */\n\trename( newName, element ) {\n\t\tconst newElement = new Element( newName, element.getAttributes(), element.getChildren() );\n\n\t\treturn this.replace( element, newElement ) ? newElement : null;\n\t}\n\n\t/**\n\t * Adds or overwrites element's attribute with a specified key and value.\n\t *\n\t *\t\twriter.setAttribute( linkElement, 'href', 'http://ckeditor.com' );\n\t *\n\t * @see module:engine/view/element~Element#_setAttribute\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @param {module:engine/view/element~Element} element Element for which attribute will be set.\n\t */\n\tsetAttribute( key, value, element ) {\n\t\telement._setAttribute( key, value );\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t *\t\twriter.removeAttribute( linkElement, 'href' );\n\t *\n\t * @see module:engine/view/element~Element#_removeAttribute\n\t * @param {String} key Attribute key.\n\t * @param {module:engine/view/element~Element} element Element from which attribute will be removed.\n\t */\n\tremoveAttribute( key, element ) {\n\t\telement._removeAttribute( key );\n\t}\n\n\t/**\n\t * Adds specified class to the element.\n\t *\n\t *\t\twriter.addClass( linkElement, 'foo' );\n\t *\t\twriter.addClass( linkElement, [ 'foo', 'bar' ] );\n\t *\n\t * @see module:engine/view/element~Element#_addClass\n\t * @param {Array.<String>|String} className Single class name or array of class names which will be added.\n\t * @param {module:engine/view/element~Element} element Element for which class will be added.\n\t */\n\taddClass( className, element ) {\n\t\telement._addClass( className );\n\t}\n\n\t/**\n\t * Removes specified class from the element.\n\t *\n\t *\t\twriter.removeClass( linkElement, 'foo' );\n\t *\t\twriter.removeClass( linkElement, [ 'foo', 'bar' ] );\n\t *\n\t * @see module:engine/view/element~Element#_removeClass\n\t * @param {Array.<String>|String} className Single class name or array of class names which will be removed.\n\t * @param {module:engine/view/element~Element} element Element from which class will be removed.\n\t */\n\tremoveClass( className, element ) {\n\t\telement._removeClass( className );\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\twriter.setStyle( element, 'color', 'red' );\n\t *\t\twriter.setStyle( element, {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t} );\n\t *\n\t * @see module:engine/view/element~Element#_setStyle\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @param {module:engine/view/element~Element} element Element for which style will be added.\n\t */\n\tsetStyle( property, value, element ) {\n\t\tif ( isPlainObject( property ) && element === undefined ) {\n\t\t\telement = value;\n\t\t}\n\t\telement._setStyle( property, value );\n\t}\n\n\t/**\n\t * Removes specified style from the element.\n\t *\n\t *\t\twriter.removeStyle( element, 'color' ); // Removes 'color' style.\n\t *\t\twriter.removeStyle( element, [ 'color', 'border-top' ] ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @see module:engine/view/element~Element#_removeStyle\n\t * @param {Array.<String>|String} property Style property name or names to be removed.\n\t * @param {module:engine/view/element~Element} element Element from which style will be removed.\n\t */\n\tremoveStyle( property, element ) {\n\t\telement._removeStyle( property );\n\t}\n\n\t/**\n\t * Sets a custom property on element. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @see module:engine/view/element~Element#_setCustomProperty\n\t * @param {String|Symbol} key Custom property name/key.\n\t * @param {*} value Custom property value to be stored.\n\t * @param {module:engine/view/element~Element} element Element for which custom property will be set.\n\t */\n\tsetCustomProperty( key, value, element ) {\n\t\telement._setCustomProperty( key, value );\n\t}\n\n\t/**\n\t * Removes a custom property stored under the given key.\n\t *\n\t * @see module:engine/view/element~Element#_removeCustomProperty\n\t * @param {String|Symbol} key Name/key of the custom property to be removed.\n\t * @param {module:engine/view/element~Element} element Element from which the custom property will be removed.\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\tremoveCustomProperty( key, element ) {\n\t\treturn element._removeCustomProperty( key );\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link #createPositionBefore},\n\t * * {@link #createPositionAfter},\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tcreatePositionAt( itemOrPosition, offset ) {\n\t\treturn Position._createAt( itemOrPosition, offset );\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionAfter( item ) {\n\t\treturn Position._createAfter( item );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tcreatePositionBefore( item ) {\n\t\treturn Position._createBefore( item );\n\t}\n\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** This factory method creates it's own {@link module:engine/view/position~Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/view/position~Position} start Start position.\n\t * @param {module:engine/view/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRange( start, end ) {\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/view/item~Item view item} and ends after it.\n\t *\n\t * @param {module:engine/view/item~Item} item\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeOn( item ) {\n\t\treturn Range._createOn( item );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/view/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/view/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/view/range~Range}\n\t */\n\tcreateRangeIn( element ) {\n\t\treturn Range._createIn( element );\n\t}\n\n\t/**\n\t * Creates a new {@link module:engine/view/selection~Selection} instance.\n\t *\n\t * \t\t// Creates empty selection without ranges.\n\t *\t\tconst selection = writer.createSelection();\n\t *\n\t *\t\t// Creates selection at the given range.\n\t *\t\tconst range = writer.createRange( start, end );\n\t *\t\tconst selection = writer.createSelection( range );\n\t *\n\t *\t\t// Creates selection at the given ranges\n\t * \t\tconst ranges = [ writer.createRange( start1, end2 ), writer.createRange( star2, end2 ) ];\n\t *\t\tconst selection = writer.createSelection( ranges );\n\t *\n\t *\t\t// Creates selection from the other selection.\n\t *\t\tconst otherSelection = writer.createSelection();\n\t *\t\tconst selection = writer.createSelection( otherSelection );\n\t *\n\t *\t\t// Creates selection from the document selection.\n\t *\t\tconst selection = writer.createSelection( editor.editing.view.document.selection );\n\t *\n\t * \t\t// Creates selection at the given position.\n\t *\t\tconst position = writer.createPositionFromPath( root, path );\n\t *\t\tconst selection = writer.createSelection( position );\n\t *\n\t *\t\t// Creates collapsed selection at the position of given item and offset.\n\t *\t\tconst paragraph = writer.createContainerElement( 'paragraph' );\n\t *\t\tconst selection = writer.createSelection( paragraph, offset );\n\t *\n\t *\t\t// Creates a range inside an {@link module:engine/view/element~Element element} which starts before the\n\t *\t\t// first child of that element and ends after the last child of that element.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'in' );\n\t *\n\t *\t\t// Creates a range on an {@link module:engine/view/item~Item item} which starts before the item and ends\n\t *\t\t// just after the item.\n\t *\t\tconst selection = writer.createSelection( paragraph, 'on' );\n\t *\n\t * `Selection`'s constructor allow passing additional options (`backward`, `fake` and `label`) as the last argument.\n\t *\n\t *\t\t// Creates backward selection.\n\t *\t\tconst selection = writer.createSelection( range, { backward: true } );\n\t *\n\t * Fake selection does not render as browser native selection over selected elements and is hidden to the user.\n\t * This way, no native selection UI artifacts are displayed to the user and selection over elements can be\n\t * represented in other way, for example by applying proper CSS class.\n\t *\n\t * Additionally fake's selection label can be provided. It will be used to describe fake selection in DOM\n\t * (and be properly handled by screen readers).\n\t *\n\t *\t\t// Creates fake selection with label.\n\t *\t\tconst selection = writer.createSelection( range, { fake: true, label: 'foo' } );\n\t *\n\t * @param {module:engine/view/selection~Selectable} [selectable=null]\n\t * @param {Number|'before'|'end'|'after'|'on'|'in'} [placeOrOffset] Offset or place when selectable is an `Item`.\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.backward] Sets this selection instance to be backward.\n\t * @param {Boolean} [options.fake] Sets this selection instance to be marked as `fake`.\n\t * @param {String} [options.label] Label for the fake selection.\n\t * @returns {module:engine/view/selection~Selection}\n\t */\n\tcreateSelection( selectable, placeOrOffset, options ) {\n\t\treturn new Selection( selectable, placeOrOffset, options );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { insertImage, isImageAllowed } from '../image/utils';\n\n/**\n * @module image/imageupload/imageuploadcommand\n */\n\n/**\n * The image upload command.\n *\n * The command is registered by the {@link module:image/imageupload/imageuploadediting~ImageUploadEditing} plugin as `'imageUpload'`.\n *\n * In order to upload an image at the current selection position\n * (according to the {@link module:widget/utils~findOptimalInsertionPosition} algorithm),\n * execute the command and pass the native image file instance:\n *\n *\t\tthis.listenTo( editor.editing.view.document, 'clipboardInput', ( evt, data ) => {\n *\t\t\t// Assuming that only images were pasted:\n *\t\t\tconst images = Array.from( data.dataTransfer.files );\n *\n *\t\t\t// Upload the first image:\n *\t\t\teditor.execute( 'imageUpload', { file: images[ 0 ] } );\n *\t\t} );\n *\n * It is also possible to insert multiple images at once:\n *\n *\t\teditor.execute( 'imageUpload', {\n *\t\t\tfile: [\n *\t\t\t\tfile1,\n *\t\t\t\tfile2\n *\t\t\t]\n *\t\t} );\n *\n * @extends module:core/command~Command\n */\nexport default class ImageUploadCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = isImageAllowed( this.editor.model );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @fires execute\n\t * @param {Object} options Options for the executed command.\n\t * @param {File|Array.<File>} options.file The image file or an array of image files to upload.\n\t */\n\texecute( options ) {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\n\t\tconst fileRepository = editor.plugins.get( FileRepository );\n\n\t\tmodel.change( writer => {\n\t\t\tconst filesToUpload = Array.isArray( options.file ) ? options.file : [ options.file ];\n\n\t\t\tfor ( const file of filesToUpload ) {\n\t\t\t\tuploadImage( writer, model, fileRepository, file );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Handles uploading single file.\n//\n// @param {module:engine/model/writer~writer} writer\n// @param {module:engine/model/model~Model} model\n// @param {File} file\nfunction uploadImage( writer, model, fileRepository, file ) {\n\tconst loader = fileRepository.createLoader( file );\n\n\t// Do not throw when upload adapter is not set. FileRepository will log an error anyway.\n\tif ( !loader ) {\n\t\treturn;\n\t}\n\n\tinsertImage( writer, model, { uploadId: loader.id } );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imageupload/imageuploadediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport FileRepository from '@ckeditor/ckeditor5-upload/src/filerepository';\nimport Notification from '@ckeditor/ckeditor5-ui/src/notification/notification';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\nimport ImageUploadCommand from '../../src/imageupload/imageuploadcommand';\nimport {\n fetchLocalImage,\n isLocalImage\n} from '../../src/imageupload/utils';\nimport { createImageTypeRegExp } from './utils';\n/**\n * The editing part of the image upload feature. It registers the `'imageUpload'` command.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUploadEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [\n FileRepository,\n Notification,\n Clipboard\n ];\n }\n static get pluginName() {\n return 'ImageUploadEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n editor.config.define('image', {\n upload: {\n types: [\n 'jpeg',\n 'png',\n 'gif',\n 'bmp',\n 'webp',\n 'tiff'\n ]\n }\n });\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const doc = editor.model.document;\n const schema = editor.model.schema;\n const conversion = editor.conversion;\n const fileRepository = editor.plugins.get(FileRepository);\n const imageTypes = createImageTypeRegExp(editor.config.get('image.upload.types'));\n // Setup schema to allow uploadId and uploadStatus for images.\n schema.extend('image', {\n allowAttributes: [\n 'uploadId',\n 'uploadStatus'\n ]\n });\n // Register imageUpload command.\n editor.commands.add('imageUpload', new ImageUploadCommand(editor));\n // Register upcast converter for uploadId.\n conversion.for('upcast').attributeToAttribute({\n view: {\n name: 'img',\n key: 'uploadId'\n },\n model: 'uploadId'\n });\n // Handle pasted images.\n // For every image file, a new file loader is created and a placeholder image is\n // inserted into the content. Then, those images are uploaded once they appear in the model\n // (see Document#change listener below).\n this.listenTo(editor.editing.view.document, 'clipboardInput', (evt, data) => {\n // Skip if non empty HTML data is included.\n // https://github.com/ckeditor/ckeditor5-upload/issues/68\n if (isHtmlIncluded(data.dataTransfer)) {\n return;\n }\n const images = Array.from(data.dataTransfer.files).filter(file => {\n // See https://github.com/ckeditor/ckeditor5-image/pull/254.\n if (!file) {\n return false;\n }\n return imageTypes.test(file.type);\n });\n const ranges = data.targetRanges.map(viewRange => editor.editing.mapper.toModelRange(viewRange));\n editor.model.change(writer => {\n // Set selection to paste target.\n writer.setSelection(ranges);\n if (images.length) {\n evt.stop();\n // Upload images after the selection has changed in order to ensure the command's state is refreshed.\n editor.model.enqueueChange('default', () => {\n editor.execute('imageUpload', { file: images });\n });\n }\n });\n });\n // Handle HTML pasted with images with base64 or blob sources.\n // For every image file, a new file loader is created and a placeholder image is\n // inserted into the content. Then, those images are uploaded once they appear in the model\n // (see Document#change listener below).\n this.listenTo(editor.plugins.get(Clipboard), 'inputTransformation', (evt, data) => {\n const fetchableImages = Array.from(editor.editing.view.createRangeIn(data.content)).filter(value => isLocalImage(value.item) && !value.item.getAttribute('uploadProcessed')).map(value => {\n return {\n promise: fetchLocalImage(value.item),\n imageElement: value.item\n };\n });\n if (!fetchableImages.length) {\n return;\n }\n const writer = new UpcastWriter();\n for (const fetchableImage of fetchableImages) {\n // Set attribute marking that the image was processed already.\n writer.setAttribute('uploadProcessed', true, fetchableImage.imageElement);\n const loader = fileRepository.createLoader(fetchableImage.promise);\n if (loader) {\n writer.setAttribute('src', '', fetchableImage.imageElement);\n writer.setAttribute('uploadId', loader.id, fetchableImage.imageElement);\n }\n }\n });\n // Prevents from the browser redirecting to the dropped image.\n editor.editing.view.document.on('dragover', (evt, data) => {\n data.preventDefault();\n });\n // Upload placeholder images that appeared in the model.\n doc.on('change', () => {\n const changes = doc.differ.getChanges({ includeChangesInGraveyard: true });\n for (const entry of changes) {\n if (entry.type == 'insert' && entry.name != '$text') {\n const item = entry.position.nodeAfter;\n const isInGraveyard = entry.position.root.rootName == '$graveyard';\n for (const image of getImagesFromChangeItem(editor, item)) {\n // Check if the image element still has upload id.\n const uploadId = image.getAttribute('uploadId');\n if (!uploadId) {\n continue;\n }\n // Check if the image is loaded on this client.\n const loader = fileRepository.loaders.get(uploadId);\n if (!loader) {\n continue;\n }\n if (isInGraveyard) {\n // If the image was inserted to the graveyard - abort the loading process.\n loader.abort();\n } else if (loader.status == 'idle') {\n // If the image was inserted into content and has not been loaded yet, start loading it.\n this._readAndUpload(loader, image);\n }\n }\n }\n }\n });\n }\n /**\n\t * Reads and uploads an image.\n\t *\n\t * The image is read from the disk and as a Base64-encoded string it is set temporarily to\n\t * `image[src]`. When the image is successfully uploaded, the temporary data is replaced with the target\n\t * image's URL (the URL to the uploaded image on the server).\n\t *\n\t * @protected\n\t * @param {module:upload/filerepository~FileLoader} loader\n\t * @param {module:engine/model/element~Element} imageElement\n\t * @returns {Promise}\n\t */\n _readAndUpload(loader, imageElement) {\n const editor = this.editor;\n const model = editor.model;\n const t = editor.locale.t;\n const fileRepository = editor.plugins.get(FileRepository);\n const notification = editor.plugins.get(Notification);\n model.enqueueChange('transparent', writer => {\n writer.setAttribute('uploadStatus', 'reading', imageElement);\n });\n return loader.read().then(() => {\n const promise = loader.upload();\n // Force re–paint in Safari. Without it, the image will display with a wrong size.\n // https://github.com/ckeditor/ckeditor5/issues/1975\n /* istanbul ignore next */\n if (env.isSafari) {\n const viewFigure = editor.editing.mapper.toViewElement(imageElement);\n const viewImg = viewFigure.getChild(0);\n editor.editing.view.once('render', () => {\n // Early returns just to be safe. There might be some code ran\n // in between the outer scope and this callback.\n if (!viewImg.parent) {\n return;\n }\n const domFigure = editor.editing.view.domConverter.mapViewToDom(viewImg.parent);\n if (!domFigure) {\n return;\n }\n const originalDisplay = domFigure.style.display;\n domFigure.style.display = 'none';\n // Make sure this line will never be removed during minification for having \"no effect\".\n domFigure._ckHack = domFigure.offsetHeight;\n domFigure.style.display = originalDisplay;\n });\n }\n model.enqueueChange('transparent', writer => {\n writer.setAttribute('uploadStatus', 'uploading', imageElement);\n });\n return promise;\n }).then(data => {\n model.enqueueChange('transparent', writer => {\n writer.setAttributes({\n uploadStatus: 'complete',\n src: data.default\n }, imageElement);\n this._parseAndSetSrcsetAttributeOnImage(data, imageElement, writer);\n });\n clean();\n }).catch(error => {\n // If status is not 'error' nor 'aborted' - throw error because it means that something else went wrong,\n // it might be generic error and it would be real pain to find what is going on.\n if (loader.status !== 'error' && loader.status !== 'aborted') {\n throw error;\n }\n // Might be 'aborted'.\n if (loader.status == 'error' && error) {\n notification.showWarning(error, {\n title: t('an'),\n namespace: 'upload'\n });\n }\n clean();\n // Permanently remove image from insertion batch.\n model.enqueueChange('transparent', writer => {\n writer.remove(imageElement);\n });\n });\n function clean() {\n model.enqueueChange('transparent', writer => {\n writer.removeAttribute('uploadId', imageElement);\n writer.removeAttribute('uploadStatus', imageElement);\n });\n fileRepository.destroyLoader(loader);\n }\n }\n /**\n\t * Creates the `srcset` attribute based on a given file upload response and sets it as an attribute to a specific image element.\n\t *\n\t * @protected\n\t * @param {Object} data Data object from which `srcset` will be created.\n\t * @param {module:engine/model/element~Element} image The image element on which the `srcset` attribute will be set.\n\t * @param {module:engine/model/writer~Writer} writer\n\t */\n _parseAndSetSrcsetAttributeOnImage(data, image, writer) {\n // Srcset attribute for responsive images support.\n let maxWidth = 0;\n const srcsetAttribute = Object.keys(data) // Filter out keys that are not integers.\n.filter(key => {\n const width = parseInt(key, 10);\n if (!isNaN(width)) {\n maxWidth = Math.max(maxWidth, width);\n return true;\n }\n }) // Convert each key to srcset entry.\n.map(key => `${ data[key] } ${ key }w`) // Join all entries.\n.join(', ');\n if (srcsetAttribute != '') {\n writer.setAttribute('srcset', {\n data: srcsetAttribute,\n width: maxWidth\n }, image);\n }\n }\n}\n// Returns `true` if non-empty `text/html` is included in the data transfer.\n//\n// @param {module:clipboard/datatransfer~DataTransfer} dataTransfer\n// @returns {Boolean}\nexport function isHtmlIncluded(dataTransfer) {\n return Array.from(dataTransfer.types).includes('text/html') && dataTransfer.getData('text/html') !== '';\n}\nfunction getImagesFromChangeItem(editor, item) {\n return Array.from(editor.model.createRangeOn(item)).filter(value => value.item.is('image')).map(value => value.item);\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imageupload\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageUploadUI from './imageupload/imageuploadui';\nimport ImageUploadProgress from './imageupload/imageuploadprogress';\nimport ImageUploadEditing from './imageupload/imageuploadediting';\n\n/**\n * The image upload plugin.\n *\n * For a detailed overview, check the {@glink features/image-upload/image-upload image upload feature} documentation.\n *\n * This plugin does not do anything directly, but it loads a set of specific plugins to enable image uploading:\n *\n * * {@link module:image/imageupload/imageuploadediting~ImageUploadEditing},\n * * {@link module:image/imageupload/imageuploadui~ImageUploadUI},\n * * {@link module:image/imageupload/imageuploadprogress~ImageUploadProgress}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageUpload extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageUpload';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageUploadEditing, ImageUploadUI, ImageUploadProgress ];\n\t}\n}\n\n/**\n * Image upload configuration.\n *\n * @member {module:image/imageupload~ImageUploadConfig} module:image/image~ImageConfig#upload\n */\n\n/**\n * The configuration of the image upload feature. Used by the image upload feature in the `@ckeditor/ckeditor5-image` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\timage: {\n * \t\t\t\t\tupload: ... // Image upload feature options.\n * \t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface module:image/imageupload~ImageUploadConfig\n */\n\n/**\n * The list of accepted image types.\n *\n * The accepted types of images can be customized to allow only certain types of images:\n *\n *\t\t// Allow only JPEG and PNG images:\n *\t\tconst imageUploadConfig = {\n *\t\t\ttypes: [ 'png', 'jpeg' ]\n *\t\t};\n *\n * The type string should match [one of the sub-types](https://www.iana.org/assignments/media-types/media-types.xhtml#image)\n * of the image MIME type. E.g. for the `image/jpeg` MIME type, add `'jpeg'` to your image upload configuration.\n *\n * **Note:** This setting only restricts some image types to be selected and uploaded through the CKEditor UI and commands. Image type\n * recognition and filtering should also be implemented on the server which accepts image uploads.\n *\n * @member {Array.<String>} module:image/imageupload~ImageUploadConfig#types\n * @default [ 'jpeg', 'png', 'gif', 'bmp', 'webp', 'tiff' ]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paragraph/paragraphcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The paragraph command.\n *\n * @extends module:core/command~Command\n */\nexport default class ParagraphCommand extends Command {\n\t/**\n\t * The value of the command. Indicates whether the selection start is placed in a paragraph.\n\t *\n\t * @readonly\n\t * @observable\n\t * @member {Boolean} #value\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst block = first( document.selection.getSelectedBlocks() );\n\n\t\tthis.value = !!block && block.is( 'paragraph' );\n\t\tthis.isEnabled = !!block && checkCanBecomeParagraph( block, model.schema );\n\t}\n\n\t/**\n\t * Executes the command. All the blocks (see {@link module:engine/model/schema~Schema}) in the selection\n\t * will be turned to paragraphs.\n\t *\n\t * @fires execute\n\t * @param {Object} [options] Options for the executed command.\n\t * @param {module:engine/model/selection~Selection|module:engine/model/documentselection~DocumentSelection} [options.selection]\n\t * The selection that the command should be applied to.\n\t * By default, if not provided, the command is applied to the {@link module:engine/model/document~Document#selection}.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\tmodel.change( writer => {\n\t\t\tconst blocks = ( options.selection || document.selection ).getSelectedBlocks();\n\n\t\t\tfor ( const block of blocks ) {\n\t\t\t\tif ( !block.is( 'paragraph' ) && checkCanBecomeParagraph( block, model.schema ) ) {\n\t\t\t\t\twriter.rename( block, 'paragraph' );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Checks whether the given block can be replaced by a paragraph.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeParagraph( block, schema ) {\n\treturn schema.checkChild( block.parent, 'paragraph' ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paragraph/paragraph\n */\n\nimport ParagraphCommand from './paragraphcommand';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The paragraph feature for the editor.\n *\n * It introduces the `<paragraph>` element in the model which renders as a `<p>` element in the DOM and data.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Paragraph extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Paragraph';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\t\tconst data = editor.data;\n\n\t\teditor.commands.add( 'paragraph', new ParagraphCommand( editor ) );\n\n\t\t// Schema.\n\t\tmodel.schema.register( 'paragraph', { inheritAllFrom: '$block' } );\n\n\t\teditor.conversion.elementToElement( { model: 'paragraph', view: 'p' } );\n\n\t\t// Content autoparagraphing. --------------------------------------------------\n\n\t\t// Handles element which has not been converted by any plugin and checks if it would be converted if\n\t\t// we wrap it in a paragraph or change it to a paragraph.\n\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t\t\tmodel: ( viewElement, modelWriter ) => {\n\t\t\t\tif ( !Paragraph.paragraphLikeElements.has( viewElement.name ) ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\t// Do not auto-paragraph empty elements.\n\t\t\t\tif ( viewElement.isEmpty ) {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\treturn modelWriter.createElement( 'paragraph' );\n\t\t\t},\n\t\t\tconverterPriority: 'low'\n\t\t} );\n\n\t\tdata.upcastDispatcher.on( 'element', ( evt, data, conversionApi ) => {\n\t\t\t// Do not try auto-paragraphing if the element was already converted.\n\t\t\tif ( !conversionApi.consumable.test( data.viewItem, { name: data.viewItem.name } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If the element is not paragraph-like try wrapping it in a paragraph.\n\t\t\tif ( isParagraphable( data.viewItem, data.modelCursor, conversionApi.schema ) ) {\n\t\t\t\tObject.assign( data, wrapInParagraph( data.viewItem, data.modelCursor, conversionApi ) );\n\t\t\t}\n\t\t}, { priority: 'low' } );\n\n\t\t// Handles not converted text nodes and checks if would be converted if we wraps then by a paragraph.\n\t\tdata.upcastDispatcher.on( 'text', ( evt, data, conversionApi ) => {\n\t\t\t// When node is already converted then do nothing.\n\t\t\tif ( data.modelRange ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( isParagraphable( data.viewItem, data.modelCursor, conversionApi.schema ) ) {\n\t\t\t\tObject.assign( data, wrapInParagraph( data.viewItem, data.modelCursor, conversionApi ) );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\n\t\t// Empty roots autoparagraphing. -----------------------------------------------\n\n\t\t// Post-fixer which takes care of adding empty paragraph elements to empty roots.\n\t\t// Besides fixing content on #changesDone we also need to handle editor.data#ready event because\n\t\t// if initial data is empty or setData() wasn't even called there will be no #change fired.\n\t\tmodel.document.registerPostFixer( writer => this._autoparagraphEmptyRoots( writer ) );\n\n\t\teditor.data.on( 'ready', () => {\n\t\t\tmodel.enqueueChange( 'transparent', writer => this._autoparagraphEmptyRoots( writer ) );\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * Fixes all empty roots.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if any change has been applied, `false` otherwise.\n\t */\n\t_autoparagraphEmptyRoots( writer ) {\n\t\tconst model = this.editor.model;\n\n\t\tfor ( const rootName of model.document.getRootNames() ) {\n\t\t\tconst root = model.document.getRoot( rootName );\n\n\t\t\tif ( root.isEmpty && root.rootName != '$graveyard' ) {\n\t\t\t\t// If paragraph element is allowed in the root, create paragraph element.\n\t\t\t\tif ( model.schema.checkChild( root, 'paragraph' ) ) {\n\t\t\t\t\twriter.insertElement( 'paragraph', root );\n\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * A list of element names which should be treated by the autoparagraphing algorithms as\n * paragraph-like. This means that e.g. the following content:\n *\n *\t\t<h1>Foo</h1>\n *\t\t<table>\n *\t\t\t<tr>\n *\t\t\t\t<td>X</td>\n *\t\t\t\t<td>\n *\t\t\t\t\t<ul>\n *\t\t\t\t\t\t<li>Y</li>\n *\t\t\t\t\t\t<li>Z</li>\n *\t\t\t\t\t</ul>\n *\t\t\t\t</td>\n *\t\t\t</tr>\n *\t\t</table>\n *\n * contains five paragraph-like elements: `<h1>`, two `<td>`s and two `<li>`s.\n * Hence, if none of the features is going to convert those elements the above content will be automatically handled\n * by the paragraph feature and converted to:\n *\n *\t\t<p>Foo</p>\n *\t\t<p>X</p>\n *\t\t<p>Y</p>\n *\t\t<p>Z</p>\n *\n * Note: The `<td>` containing two `<li>` elements was ignored as the innermost paragraph-like elements\n * have a priority upon conversion.\n *\n * @member {Set.<String>} module:paragraph/paragraph~Paragraph.paragraphLikeElements\n */\nParagraph.paragraphLikeElements = new Set( [\n\t'blockquote',\n\t'dd',\n\t'div',\n\t'dt',\n\t'h1',\n\t'h2',\n\t'h3',\n\t'h4',\n\t'h5',\n\t'h6',\n\t'li',\n\t'p',\n\t'td'\n] );\n\nfunction wrapInParagraph( input, position, conversionApi ) {\n\tconst paragraph = conversionApi.writer.createElement( 'paragraph' );\n\n\tconversionApi.writer.insert( paragraph, position );\n\treturn conversionApi.convertItem( input, conversionApi.writer.createPositionAt( paragraph, 0 ) );\n}\n\nfunction isParagraphable( node, position, schema ) {\n\tconst context = schema.createContext( position );\n\n\t// When paragraph is allowed in this context...\n\tif ( !schema.checkChild( context, 'paragraph' ) ) {\n\t\treturn false;\n\t}\n\n\t// And a node would be allowed in this paragraph...\n\tif ( !schema.checkChild( context.push( 'paragraph' ), node ) ) {\n\t\treturn false;\n\t}\n\n\treturn true;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/headingcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The heading command. It is used by the {@link module:heading/heading~Heading heading feature} to apply headings.\n *\n * @extends module:core/command~Command\n */\nexport default class HeadingCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor Editor instance.\n\t * @param {Array.<String>} modelElements Names of the element which this command can apply in the model.\n\t */\n\tconstructor( editor, modelElements ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * If the selection starts in a heading (which {@link #modelElements is supported by this command})\n\t\t * the value is set to the name of that heading model element.\n\t\t * It is set to `false` otherwise.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean|String} #value\n\t\t */\n\n\t\t/**\n\t\t * Set of defined model's elements names that this command support.\n\t\t * See {@link module:heading/heading~HeadingOption}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<String>}\n\t\t */\n\t\tthis.modelElements = modelElements;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst block = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\tthis.value = !!block && this.modelElements.includes( block.name ) && block.name;\n\t\tthis.isEnabled = !!block && this.modelElements.some( heading => checkCanBecomeHeading( block, heading, this.editor.model.schema ) );\n\t}\n\n\t/**\n\t * Executes the command. Applies the heading to the selected blocks or, if the first selected\n\t * block is a heading already, turns selected headings (of this level only) to paragraphs.\n\t *\n\t * @param {Object} options\n\t * @param {String} options.value Name of the element which this command will apply in the model.\n\t * @fires execute\n\t */\n\texecute( options ) {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\n\t\tconst modelElement = options.value;\n\n\t\tmodel.change( writer => {\n\t\t\tconst blocks = Array.from( document.selection.getSelectedBlocks() )\n\t\t\t\t.filter( block => {\n\t\t\t\t\treturn checkCanBecomeHeading( block, modelElement, model.schema );\n\t\t\t\t} );\n\n\t\t\tfor ( const block of blocks ) {\n\t\t\t\tif ( !block.is( modelElement ) ) {\n\t\t\t\t\twriter.rename( block, modelElement );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n\n// Checks whether the given block can be replaced by a specific heading.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:heading/headingcommand~HeadingCommand#modelElement} heading Command element name in the model.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeHeading( block, heading, schema ) {\n\treturn schema.checkChild( block.parent, heading ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/headingediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\nimport HeadingCommand from './headingcommand';\n\nimport priorities from '@ckeditor/ckeditor5-utils/src/priorities';\n\nconst defaultModelElement = 'paragraph';\n\n/**\n * The headings engine feature. It handles switching between block formats – headings and paragraph.\n * This class represents the engine part of the heading feature. See also {@link module:heading/heading~Heading}.\n * It introduces `heading1`-`headingN` commands which allow to convert paragraphs into headings.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class HeadingEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'HeadingEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\teditor.config.define( 'heading', {\n\t\t\toptions: [\n\t\t\t\t{ model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },\n\t\t\t\t{ model: 'heading1', view: 'h2', title: 'Heading 1', class: 'ck-heading_heading1' },\n\t\t\t\t{ model: 'heading2', view: 'h3', title: 'Heading 2', class: 'ck-heading_heading2' },\n\t\t\t\t{ model: 'heading3', view: 'h4', title: 'Heading 3', class: 'ck-heading_heading3' }\n\t\t\t]\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Paragraph ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst options = editor.config.get( 'heading.options' );\n\n\t\tconst modelElements = [];\n\n\t\tfor ( const option of options ) {\n\t\t\t// Skip paragraph - it is defined in required Paragraph feature.\n\t\t\tif ( option.model !== defaultModelElement ) {\n\t\t\t\t// Schema.\n\t\t\t\teditor.model.schema.register( option.model, {\n\t\t\t\t\tinheritAllFrom: '$block'\n\t\t\t\t} );\n\n\t\t\t\teditor.conversion.elementToElement( option );\n\n\t\t\t\tmodelElements.push( option.model );\n\t\t\t}\n\t\t}\n\n\t\tthis._addDefaultH1Conversion( editor );\n\n\t\t// Register the heading command for this option.\n\t\teditor.commands.add( 'heading', new HeadingCommand( editor, modelElements ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\t// If the enter command is added to the editor, alter its behavior.\n\t\t// Enter at the end of a heading element should create a paragraph.\n\t\tconst editor = this.editor;\n\t\tconst enterCommand = editor.commands.get( 'enter' );\n\t\tconst options = editor.config.get( 'heading.options' );\n\n\t\tif ( enterCommand ) {\n\t\t\tthis.listenTo( enterCommand, 'afterExecute', ( evt, data ) => {\n\t\t\t\tconst positionParent = editor.model.document.selection.getFirstPosition().parent;\n\t\t\t\tconst isHeading = options.some( option => positionParent.is( option.model ) );\n\n\t\t\t\tif ( isHeading && !positionParent.is( defaultModelElement ) && positionParent.childCount === 0 ) {\n\t\t\t\t\tdata.writer.rename( positionParent, defaultModelElement );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Adds default conversion for `h1` -> `heading1` with a low priority.\n\t *\n\t * @private\n\t * @param {module:core/editor/editor~Editor} editor Editor instance on which to add the `h1` conversion.\n\t */\n\t_addDefaultH1Conversion( editor ) {\n\t\teditor.conversion.for( 'upcast' ).elementToElement( {\n\t\t\tmodel: 'heading1',\n\t\t\tview: 'h1',\n\t\t\t// With a `low` priority, `paragraph` plugin autoparagraphing mechanism is executed. Make sure\n\t\t\t// this listener is called before it. If not, `h1` will be transformed into a paragraph.\n\t\t\tconverterPriority: priorities.get( 'low' ) + 1\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ui/model\n */\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport { extend } from 'lodash-es';\n\n/**\n * The base MVC model class.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Model {\n\t/**\n\t * Creates a new Model instance.\n\t *\n\t * @param {Object} [attributes] The model state attributes to be defined during the instance creation.\n\t * @param {Object} [properties] The (out of state) properties to be appended to the instance during creation.\n\t */\n\tconstructor( attributes, properties ) {\n\t\t// Extend this instance with the additional (out of state) properties.\n\t\tif ( properties ) {\n\t\t\textend( this, properties );\n\t\t}\n\n\t\t// Initialize the attributes.\n\t\tif ( attributes ) {\n\t\t\tthis.set( attributes );\n\t\t}\n\t}\n}\n\nmix( Model, ObservableMixin );\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module heading/headingui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Model from '@ckeditor/ckeditor5-ui/src/model';\nimport {\n createDropdown,\n addListToDropdown\n} from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport { getLocalizedOptions } from './utils';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport '../theme/heading.css';\n/**\n * The headings UI feature. It introduces the `headings` dropdown.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class HeadingUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = editor.t;\n const options = getLocalizedOptions(editor);\n const defaultTitle = t('e');\n const dropdownTooltip = t('f');\n // Register UI component.\n editor.ui.componentFactory.add('heading', locale => {\n const titles = {};\n const itemDefinitions = new Collection();\n const headingCommand = editor.commands.get('heading');\n const paragraphCommand = editor.commands.get('paragraph');\n const commands = [headingCommand];\n for (const option of options) {\n const def = {\n type: 'button',\n model: new Model({\n label: option.title,\n class: option.class,\n withText: true\n })\n };\n if (option.model === 'paragraph') {\n def.model.bind('isOn').to(paragraphCommand, 'value');\n def.model.set('commandName', 'paragraph');\n commands.push(paragraphCommand);\n } else {\n def.model.bind('isOn').to(headingCommand, 'value', value => value === option.model);\n def.model.set({\n commandName: 'heading',\n commandValue: option.model\n });\n }\n // Add the option to the collection.\n itemDefinitions.add(def);\n titles[option.model] = option.title;\n }\n const dropdownView = createDropdown(locale);\n addListToDropdown(dropdownView, itemDefinitions);\n dropdownView.buttonView.set({\n isOn: false,\n withText: true,\n tooltip: dropdownTooltip\n });\n dropdownView.extendTemplate({ attributes: { class: ['ck-heading-dropdown'] } });\n dropdownView.bind('isEnabled').toMany(commands, 'isEnabled', (...areEnabled) => {\n return areEnabled.some(isEnabled => isEnabled);\n });\n dropdownView.buttonView.bind('label').to(headingCommand, 'value', paragraphCommand, 'value', (value, para) => {\n const whichModel = value || para && 'paragraph';\n // If none of the commands is active, display default title.\n return titles[whichModel] ? titles[whichModel] : defaultTitle;\n });\n // Execute command when an item from the dropdown is selected.\n this.listenTo(dropdownView, 'execute', evt => {\n editor.execute(evt.source.commandName, evt.source.commandValue ? { value: evt.source.commandValue } : undefined);\n editor.editing.view.focus();\n });\n return dropdownView;\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module heading/utils\n */\n/**\n * Returns heading options as defined in `config.heading.options` but processed to consider\n * the editor localization, i.e. to display {@link module:heading/heading~HeadingOption}\n * in the correct language.\n *\n * Note: The reason behind this method is that there is no way to use {@link module:utils/locale~Locale#t}\n * when the user configuration is defined because the editor does not exist yet.\n *\n * @param {module:core/editor/editor~Editor} editor\n * @returns {Array.<module:heading/heading~HeadingOption>}.\n */\nexport function getLocalizedOptions(editor) {\n const t = editor.t;\n const localizedTitles = {\n Paragraph: t('bw'),\n 'Heading 1': t('bx'),\n 'Heading 2': t('by'),\n 'Heading 3': t('bz'),\n 'Heading 4': t('ca'),\n 'Heading 5': t('cb'),\n 'Heading 6': t('cc')\n };\n return editor.config.get('heading.options').map(option => {\n const title = localizedTitles[option.title];\n if (title && title != option.title) {\n option.title = title;\n }\n return option;\n });\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagecaption/utils\n */\n\nimport { enablePlaceholder } from '@ckeditor/ckeditor5-engine/src/view/placeholder';\nimport { toWidgetEditable } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Returns a function that creates a caption editable element for the given {@link module:engine/view/document~Document}.\n *\n * @param {module:engine/view/view~View} view\n * @param {String} placeholderText The text to be displayed when the caption is empty.\n * @returns {Function}\n */\nexport function captionElementCreator( view, placeholderText ) {\n\treturn writer => {\n\t\tconst editable = writer.createEditableElement( 'figcaption' );\n\t\twriter.setCustomProperty( 'imageCaption', true, editable );\n\n\t\tenablePlaceholder( {\n\t\t\tview,\n\t\t\telement: editable,\n\t\t\ttext: placeholderText\n\t\t} );\n\n\t\treturn toWidgetEditable( editable, writer );\n\t};\n}\n\n/**\n * Returns `true` if a given view element is the image caption editable.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isCaption( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'imageCaption' );\n}\n\n/**\n * Returns the caption model element from a given image element. Returns `null` if no caption is found.\n *\n * @param {module:engine/model/element~Element} imageModelElement\n * @returns {module:engine/model/element~Element|null}\n */\nexport function getCaptionFromImage( imageModelElement ) {\n\tfor ( const node of imageModelElement.getChildren() ) {\n\t\tif ( !!node && node.is( 'caption' ) ) {\n\t\t\treturn node;\n\t\t}\n\t}\n\n\treturn null;\n}\n\n/**\n * {@link module:engine/view/matcher~Matcher} pattern. Checks if a given element is a `<figcaption>` element that is placed\n * inside the image `<figure>` element.\n *\n * @param {module:engine/view/element~Element} element\n * @returns {Object|null} Returns the object accepted by {@link module:engine/view/matcher~Matcher} or `null` if the element\n * cannot be matched.\n */\nexport function matchImageCaption( element ) {\n\tconst parent = element.parent;\n\n\t// Convert only captions for images.\n\tif ( element.name == 'figcaption' && parent && parent.name == 'figure' && parent.hasClass( 'image' ) ) {\n\t\treturn { name: true };\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagecaption/imagecaptionediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { isImage } from '../image/utils';\nimport {\n captionElementCreator,\n getCaptionFromImage,\n matchImageCaption\n} from './utils';\n/**\n * The image caption engine plugin.\n *\n * It registers proper converters. It takes care of adding a caption element if the image without it is inserted\n * to the model document.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageCaptionEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageCaptionEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const view = editor.editing.view;\n const schema = editor.model.schema;\n const data = editor.data;\n const editing = editor.editing;\n const t = editor.t;\n /**\n\t\t * The last selected caption editable.\n\t\t * It is used for hiding the editable when it is empty and the image widget is no longer selected.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/view/editableelement~EditableElement} #_lastSelectedCaption\n\t\t */\n // Schema configuration.\n schema.register('caption', {\n allowIn: 'image',\n allowContentOf: '$block',\n isLimit: true\n });\n // Add caption element to each image inserted without it.\n editor.model.document.registerPostFixer(writer => this._insertMissingModelCaptionElement(writer));\n // View to model converter for the data pipeline.\n editor.conversion.for('upcast').elementToElement({\n view: matchImageCaption,\n model: 'caption'\n });\n // Model to view converter for the data pipeline.\n const createCaptionForData = writer => writer.createContainerElement('figcaption');\n data.downcastDispatcher.on('insert:caption', captionModelToView(createCaptionForData, false));\n // Model to view converter for the editing pipeline.\n const createCaptionForEditing = captionElementCreator(view, t('am'));\n editing.downcastDispatcher.on('insert:caption', captionModelToView(createCaptionForEditing));\n // Always show caption in view when something is inserted in model.\n editing.downcastDispatcher.on('insert', this._fixCaptionVisibility(data => data.item), { priority: 'high' });\n // Hide caption when everything is removed from it.\n editing.downcastDispatcher.on('remove', this._fixCaptionVisibility(data => data.position.parent), { priority: 'high' });\n // Update caption visibility on view in post fixer.\n view.document.registerPostFixer(writer => this._updateCaptionVisibility(writer));\n }\n /**\n\t * Updates the view before each rendering, making sure that empty captions (so unnecessary ones) are hidden\n\t * and then visible when the image is selected.\n\t *\n\t * @private\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n\t * @returns {Boolean} Returns `true` when the view is updated.\n\t */\n _updateCaptionVisibility(viewWriter) {\n const mapper = this.editor.editing.mapper;\n const lastCaption = this._lastSelectedCaption;\n let viewCaption;\n // If whole image is selected.\n const modelSelection = this.editor.model.document.selection;\n const selectedElement = modelSelection.getSelectedElement();\n if (selectedElement && selectedElement.is('image')) {\n const modelCaption = getCaptionFromImage(selectedElement);\n viewCaption = mapper.toViewElement(modelCaption);\n }\n // If selection is placed inside caption.\n const position = modelSelection.getFirstPosition();\n const modelCaption = getParentCaption(position.parent);\n if (modelCaption) {\n viewCaption = mapper.toViewElement(modelCaption);\n }\n // Is currently any caption selected?\n if (viewCaption) {\n // Was any caption selected before?\n if (lastCaption) {\n // Same caption as before?\n if (lastCaption === viewCaption) {\n return showCaption(viewCaption, viewWriter);\n } else {\n hideCaptionIfEmpty(lastCaption, viewWriter);\n this._lastSelectedCaption = viewCaption;\n return showCaption(viewCaption, viewWriter);\n }\n } else {\n this._lastSelectedCaption = viewCaption;\n return showCaption(viewCaption, viewWriter);\n }\n } else {\n // Was any caption selected before?\n if (lastCaption) {\n const viewModified = hideCaptionIfEmpty(lastCaption, viewWriter);\n this._lastSelectedCaption = null;\n return viewModified;\n } else {\n return false;\n }\n }\n }\n /**\n\t * Returns a converter that fixes caption visibility during the model-to-view conversion.\n\t * Checks if the changed node is placed inside the caption element and fixes its visibility in the view.\n\t *\n\t * @private\n\t * @param {Function} nodeFinder\n\t * @returns {Function}\n\t */\n _fixCaptionVisibility(nodeFinder) {\n return (evt, data, conversionApi) => {\n const node = nodeFinder(data);\n const modelCaption = getParentCaption(node);\n const mapper = this.editor.editing.mapper;\n const viewWriter = conversionApi.writer;\n if (modelCaption) {\n const viewCaption = mapper.toViewElement(modelCaption);\n if (viewCaption) {\n if (modelCaption.childCount) {\n viewWriter.removeClass('ck-hidden', viewCaption);\n } else {\n viewWriter.addClass('ck-hidden', viewCaption);\n }\n }\n }\n };\n }\n /**\n\t * Checks whether the data inserted to the model document have an image element that has no caption element inside it.\n\t * If there is none, it adds it to the image element.\n\t *\n\t * @private\n\t * @param {module:engine/model/writer~Writer} writer The writer to make changes with.\n\t * @returns {Boolean} `true` if any change was applied, `false` otherwise.\n\t */\n _insertMissingModelCaptionElement(writer) {\n const model = this.editor.model;\n const changes = model.document.differ.getChanges();\n const imagesWithoutCaption = [];\n for (const entry of changes) {\n if (entry.type == 'insert' && entry.name != '$text') {\n const item = entry.position.nodeAfter;\n if (item.is('image') && !getCaptionFromImage(item)) {\n imagesWithoutCaption.push(item);\n }\n // Check elements with children for nested images.\n if (!item.is('image') && item.childCount) {\n for (const nestedItem of model.createRangeIn(item).getItems()) {\n if (nestedItem.is('image') && !getCaptionFromImage(nestedItem)) {\n imagesWithoutCaption.push(nestedItem);\n }\n }\n }\n }\n }\n for (const image of imagesWithoutCaption) {\n writer.appendElement('caption', image);\n }\n return !!imagesWithoutCaption.length;\n }\n}\n// Creates a converter that converts image caption model element to view element.\n//\n// @private\n// @param {Function} elementCreator\n// @param {Boolean} [hide=true] When set to `false` view element will not be inserted when it's empty.\n// @returns {Function}\nfunction captionModelToView(elementCreator, hide = true) {\n return (evt, data, conversionApi) => {\n const captionElement = data.item;\n // Return if element shouldn't be present when empty.\n if (!captionElement.childCount && !hide) {\n return;\n }\n if (isImage(captionElement.parent)) {\n if (!conversionApi.consumable.consume(data.item, 'insert')) {\n return;\n }\n const viewImage = conversionApi.mapper.toViewElement(data.range.start.parent);\n const viewCaption = elementCreator(conversionApi.writer);\n const viewWriter = conversionApi.writer;\n // Hide if empty.\n if (!captionElement.childCount) {\n viewWriter.addClass('ck-hidden', viewCaption);\n }\n insertViewCaptionAndBind(viewCaption, data.item, viewImage, conversionApi);\n }\n };\n}\n// Inserts `viewCaption` at the end of `viewImage` and binds it to `modelCaption`.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} viewCaption\n// @param {module:engine/model/element~Element} modelCaption\n// @param {module:engine/view/containerelement~ContainerElement} viewImage\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction insertViewCaptionAndBind(viewCaption, modelCaption, viewImage, conversionApi) {\n const viewPosition = conversionApi.writer.createPositionAt(viewImage, 'end');\n conversionApi.writer.insert(viewPosition, viewCaption);\n conversionApi.mapper.bindElements(modelCaption, viewCaption);\n}\n// Checks if the provided node or one of its ancestors is a caption element, and returns it.\n//\n// @private\n// @param {module:engine/model/node~Node} node\n// @returns {module:engine/model/element~Element|null}\nfunction getParentCaption(node) {\n const ancestors = node.getAncestors({ includeSelf: true });\n const caption = ancestors.find(ancestor => ancestor.name == 'caption');\n if (caption && caption.parent && caption.parent.name == 'image') {\n return caption;\n }\n return null;\n}\n// Hides a given caption in the view if it is empty.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} caption\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @returns {Boolean} Returns `true` if the view was modified.\nfunction hideCaptionIfEmpty(caption, viewWriter) {\n if (!caption.childCount && !caption.hasClass('ck-hidden')) {\n viewWriter.addClass('ck-hidden', caption);\n return true;\n }\n return false;\n}\n// Shows the caption.\n//\n// @private\n// @param {module:engine/view/containerelement~ContainerElement} caption\n// @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter\n// @returns {Boolean} Returns `true` if the view was modified.\nfunction showCaption(caption, viewWriter) {\n if (caption.hasClass('ck-hidden')) {\n viewWriter.removeClass('ck-hidden', caption);\n return true;\n }\n return false;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/imagestylecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { isImage } from '../image/utils';\n\n/**\n * The image style command. It is used to apply different image styles.\n *\n * @extends module:core/command~Command\n */\nexport default class ImageStyleCommand extends Command {\n\t/**\n\t * Creates an instance of the image style command. Each command instance is handling one style.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles The styles that this command supports.\n\t */\n\tconstructor( editor, styles ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The name of the default style, if it is present. If there is no default style, it defaults to `false`.\n\t\t *\n\t\t * @readonly\n\t\t * @type {Boolean|String}\n\t\t */\n\t\tthis.defaultStyle = false;\n\n\t\t/**\n\t\t * A style handled by this command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} #styles\n\t\t */\n\t\tthis.styles = styles.reduce( ( styles, style ) => {\n\t\t\tstyles[ style.name ] = style;\n\n\t\t\tif ( style.isDefault ) {\n\t\t\t\tthis.defaultStyle = style.name;\n\t\t\t}\n\n\t\t\treturn styles;\n\t\t}, {} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst element = this.editor.model.document.selection.getSelectedElement();\n\n\t\tthis.isEnabled = isImage( element );\n\n\t\tif ( !element ) {\n\t\t\tthis.value = false;\n\t\t} else if ( element.hasAttribute( 'imageStyle' ) ) {\n\t\t\tconst attributeValue = element.getAttribute( 'imageStyle' );\n\t\t\tthis.value = this.styles[ attributeValue ] ? attributeValue : false;\n\t\t} else {\n\t\t\tthis.value = this.defaultStyle;\n\t\t}\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t *\t\teditor.execute( 'imageStyle', { value: 'side' } );\n\t *\n\t * @param {Object} options\n\t * @param {String} options.value The name of the style (based on the\n\t * {@link module:image/image~ImageConfig#styles `image.styles`} configuration option).\n\t * @fires execute\n\t */\n\texecute( options ) {\n\t\tconst styleName = options.value;\n\n\t\tconst model = this.editor.model;\n\t\tconst imageElement = model.document.selection.getSelectedElement();\n\n\t\tmodel.change( writer => {\n\t\t\t// Default style means that there is no `imageStyle` attribute in the model.\n\t\t\t// https://github.com/ckeditor/ckeditor5-image/issues/147\n\t\t\tif ( this.styles[ styleName ].isDefault ) {\n\t\t\t\twriter.removeAttribute( 'imageStyle', imageElement );\n\t\t\t} else {\n\t\t\t\twriter.setAttribute( 'imageStyle', styleName, imageElement );\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * @module image/imagestyle/converters\n */\n\n/**\n * Returns a converter for the `imageStyle` attribute. It can be used for adding, changing and removing the attribute.\n *\n * @param {Object} styles An object containing available styles. See {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}\n * for more details.\n * @returns {Function} A model-to-view attribute converter.\n */\nexport function modelToViewStyleAttribute( styles ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Check if there is class name associated with given value.\n\t\tconst newStyle = getStyleByName( data.attributeNewValue, styles );\n\t\tconst oldStyle = getStyleByName( data.attributeOldValue, styles );\n\n\t\tconst viewElement = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\tif ( oldStyle ) {\n\t\t\tviewWriter.removeClass( oldStyle.className, viewElement );\n\t\t}\n\n\t\tif ( newStyle ) {\n\t\t\tviewWriter.addClass( newStyle.className, viewElement );\n\t\t}\n\t};\n}\n\n/**\n * Returns a view-to-model converter converting image CSS classes to a proper value in the model.\n *\n * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles The styles for which the converter is created.\n * @returns {Function} A view-to-model converter.\n */\nexport function viewToModelStyleAttribute( styles ) {\n\t// Convert only non–default styles.\n\tconst filteredStyles = styles.filter( style => !style.isDefault );\n\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !data.modelRange ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewFigureElement = data.viewItem;\n\t\tconst modelImageElement = first( data.modelRange.getItems() );\n\n\t\t// Check if `imageStyle` attribute is allowed for current element.\n\t\tif ( !conversionApi.schema.checkAttribute( modelImageElement, 'imageStyle' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Convert style one by one.\n\t\tfor ( const style of filteredStyles ) {\n\t\t\t// Try to consume class corresponding with style.\n\t\t\tif ( conversionApi.consumable.consume( viewFigureElement, { classes: style.className } ) ) {\n\t\t\t\t// And convert this style to model attribute.\n\t\t\t\tconversionApi.writer.setAttribute( 'imageStyle', style.name, modelImageElement );\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Returns the style with a given `name` from an array of styles.\n//\n// @param {String} name\n// @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat> } styles\n// @returns {module:image/imagestyle/imagestyleediting~ImageStyleFormat|undefined}\nfunction getStyleByName( name, styles ) {\n\tfor ( const style of styles ) {\n\t\tif ( style.name === name ) {\n\t\t\treturn style;\n\t\t}\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M2 4.5V3h16v1.5zm2.5 3V12h11V7.5h-11zM4.061 6H15.94c.586 0 1.061.407 1.061.91v5.68c0 .503-.475.91-1.061.91H4.06c-.585 0-1.06-.407-1.06-.91V6.91C3 6.406 3.475 6 4.061 6zM2 16.5V15h16v1.5z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/utils\n */\n\n/* globals console */\n\nimport fullWidthIcon from '@ckeditor/ckeditor5-core/theme/icons/object-full-width.svg';\nimport leftIcon from '@ckeditor/ckeditor5-core/theme/icons/object-left.svg';\nimport centerIcon from '@ckeditor/ckeditor5-core/theme/icons/object-center.svg';\nimport rightIcon from '@ckeditor/ckeditor5-core/theme/icons/object-right.svg';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Default image styles provided by the plugin that can be referred in the\n * {@link module:image/image~ImageConfig#styles} configuration.\n *\n * Among them, 2 default semantic content styles are available:\n *\n * * `full` is a full–width image without any CSS class,\n * * `side` is a side image styled with the `image-style-side` CSS class.\n *\n * There are also 3 styles focused on formatting:\n *\n * * `alignLeft` aligns the image to the left using the `image-style-align-left` class,\n * * `alignCenter` centers the image using the `image-style-align-center` class,\n * * `alignRight` aligns the image to the right using the `image-style-align-right` class,\n *\n * @member {Object.<String,Object>}\n */\nconst defaultStyles = {\n\t// This option is equal to the situation when no style is applied.\n\tfull: {\n\t\tname: 'full',\n\t\ttitle: 'Full size image',\n\t\ticon: fullWidthIcon,\n\t\tisDefault: true\n\t},\n\n\t// This represents a side image.\n\tside: {\n\t\tname: 'side',\n\t\ttitle: 'Side image',\n\t\ticon: rightIcon,\n\t\tclassName: 'image-style-side'\n\t},\n\n\t// This style represents an image aligned to the left.\n\talignLeft: {\n\t\tname: 'alignLeft',\n\t\ttitle: 'Left aligned image',\n\t\ticon: leftIcon,\n\t\tclassName: 'image-style-align-left'\n\t},\n\n\t// This style represents a centered image.\n\talignCenter: {\n\t\tname: 'alignCenter',\n\t\ttitle: 'Centered image',\n\t\ticon: centerIcon,\n\t\tclassName: 'image-style-align-center'\n\t},\n\n\t// This style represents an image aligned to the right.\n\talignRight: {\n\t\tname: 'alignRight',\n\t\ttitle: 'Right aligned image',\n\t\ticon: rightIcon,\n\t\tclassName: 'image-style-align-right'\n\t}\n};\n\n/**\n * Default image style icons provided by the plugin that can be referred in the\n * {@link module:image/image~ImageConfig#styles} configuration.\n *\n * There are 4 icons available: `'full'`, `'left'`, `'center'` and `'right'`.\n *\n * @member {Object.<String, String>}\n */\nconst defaultIcons = {\n\tfull: fullWidthIcon,\n\tleft: leftIcon,\n\tright: rightIcon,\n\tcenter: centerIcon\n};\n\n/**\n * Returns a {@link module:image/image~ImageConfig#styles} array with items normalized in the\n * {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat} format and a complete `icon` markup for each style.\n *\n * @returns {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>}\n */\nexport function normalizeImageStyles( configuredStyles = [] ) {\n\treturn configuredStyles.map( _normalizeStyle );\n}\n\n// Normalizes an image style provided in the {@link module:image/image~ImageConfig#styles}\n// and returns it in a {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}.\n//\n// @param {Object} style\n// @returns {@link module:image/imagestyle/imagestyleediting~ImageStyleFormat}\nfunction _normalizeStyle( style ) {\n\t// Just the name of the style has been passed.\n\tif ( typeof style == 'string' ) {\n\t\tconst styleName = style;\n\n\t\t// If it's one of the defaults, just use it.\n\t\tif ( defaultStyles[ styleName ] ) {\n\t\t\t// Clone the style to avoid overriding defaults.\n\t\t\tstyle = Object.assign( {}, defaultStyles[ styleName ] );\n\t\t}\n\t\t// If it's just a name but none of the defaults, warn because probably it's a mistake.\n\t\telse {\n\t\t\tconsole.warn(\n\t\t\t\tattachLinkToDocumentation( 'image-style-not-found: There is no such image style of given name.' ),\n\t\t\t\t{ name: styleName }\n\t\t\t);\n\n\t\t\t// Normalize the style anyway to prevent errors.\n\t\t\tstyle = {\n\t\t\t\tname: styleName\n\t\t\t};\n\t\t}\n\t}\n\t// If an object style has been passed and if the name matches one of the defaults,\n\t// extend it with defaults – the user wants to customize a default style.\n\t// Note: Don't override the user–defined style object, clone it instead.\n\telse if ( defaultStyles[ style.name ] ) {\n\t\tconst defaultStyle = defaultStyles[ style.name ];\n\t\tconst extendedStyle = Object.assign( {}, style );\n\n\t\tfor ( const prop in defaultStyle ) {\n\t\t\tif ( !style.hasOwnProperty( prop ) ) {\n\t\t\t\textendedStyle[ prop ] = defaultStyle[ prop ];\n\t\t\t}\n\t\t}\n\n\t\tstyle = extendedStyle;\n\t}\n\n\t// If an icon is defined as a string and correspond with a name\n\t// in default icons, use the default icon provided by the plugin.\n\tif ( typeof style.icon == 'string' && defaultIcons[ style.icon ] ) {\n\t\tstyle.icon = defaultIcons[ style.icon ];\n\t}\n\n\treturn style;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle/imagestyleediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageStyleCommand from './imagestylecommand';\nimport { viewToModelStyleAttribute, modelToViewStyleAttribute } from './converters';\nimport { normalizeImageStyles } from './utils';\n\n/**\n * The image style engine plugin. It sets the default configuration, creates converters and registers\n * {@link module:image/imagestyle/imagestylecommand~ImageStyleCommand ImageStyleCommand}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyleEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageStyleEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst schema = editor.model.schema;\n\t\tconst data = editor.data;\n\t\tconst editing = editor.editing;\n\n\t\t// Define default configuration.\n\t\teditor.config.define( 'image.styles', [ 'full', 'side' ] );\n\n\t\t// Get configuration.\n\t\tconst styles = normalizeImageStyles( editor.config.get( 'image.styles' ) );\n\n\t\t// Allow imageStyle attribute in image.\n\t\t// We could call it 'style' but https://github.com/ckeditor/ckeditor5-engine/issues/559.\n\t\tschema.extend( 'image', { allowAttributes: 'imageStyle' } );\n\n\t\t// Converters for imageStyle attribute from model to view.\n\t\tconst modelToViewConverter = modelToViewStyleAttribute( styles );\n\t\tediting.downcastDispatcher.on( 'attribute:imageStyle:image', modelToViewConverter );\n\t\tdata.downcastDispatcher.on( 'attribute:imageStyle:image', modelToViewConverter );\n\n\t\t// Converter for figure element from view to model.\n\t\tdata.upcastDispatcher.on( 'element:figure', viewToModelStyleAttribute( styles ), { priority: 'low' } );\n\n\t\t// Register imageStyle command.\n\t\teditor.commands.add( 'imageStyle', new ImageStyleCommand( editor, styles ) );\n\t}\n}\n\n/**\n * The image style format descriptor.\n *\n *\t\timport fullSizeIcon from 'path/to/icon.svg';\n *\n *\t\tconst imageStyleFormat = {\n *\t\t\tname: 'fullSize',\n *\t\t\ticon: fullSizeIcon,\n *\t\t\ttitle: 'Full size image',\n *\t\t\tclassName: 'image-full-size'\n *\t\t}\n *\n * @typedef {Object} module:image/imagestyle/imagestyleediting~ImageStyleFormat\n *\n * @property {String} name The unique name of the style. It will be used to:\n *\n * * Store the chosen style in the model by setting the `imageStyle` attribute of the `<image>` element.\n * * As a value of the {@link module:image/imagestyle/imagestylecommand~ImageStyleCommand#execute `imageStyle` command},\n * * when registering a button for each of the styles (`'imageStyle:{name}'`) in the\n * {@link module:ui/componentfactory~ComponentFactory UI components factory} (this functionality is provided by the\n * {@link module:image/imagestyle/imagestyleui~ImageStyleUI} plugin).\n *\n * @property {Boolean} [isDefault] When set, the style will be used as the default one.\n * A default style does not apply any CSS class to the view element.\n *\n * @property {String} icon One of the following to be used when creating the style's button:\n *\n * * An SVG icon source (as an XML string).\n * * One of {@link module:image/imagestyle/utils~defaultIcons} to use a default icon provided by the plugin.\n *\n * @property {String} title The style's title.\n *\n * @property {String} className The CSS class used to represent the style in the view.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagestyle/imagestyleui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport { normalizeImageStyles } from './utils';\nimport '../../theme/imagestyle.css';\n/**\n * The image style UI plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyleUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageStyleUI';\n }\n /**\n\t * Returns the default localized style titles provided by the plugin.\n\t *\n\t * The following localized titles corresponding with\n\t * {@link module:image/imagestyle/utils~defaultStyles} are available:\n\t *\n\t * * `'Full size image'`,\n\t * * `'Side image'`,\n\t * * `'Left aligned image'`,\n\t * * `'Centered image'`,\n\t * * `'Right aligned image'`\n\t *\n\t * @returns {Object.<String,String>}\n\t */\n get localizedDefaultStylesTitles() {\n const t = this.editor.t;\n return {\n 'Full size image': t('ah'),\n 'Side image': t('ai'),\n 'Left aligned image': t('aj'),\n 'Centered image': t('ak'),\n 'Right aligned image': t('al')\n };\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const configuredStyles = editor.config.get('image.styles');\n const translatedStyles = translateStyles(normalizeImageStyles(configuredStyles), this.localizedDefaultStylesTitles);\n for (const style of translatedStyles) {\n this._createButton(style);\n }\n }\n /**\n\t * Creates a button for each style and stores it in the editor {@link module:ui/componentfactory~ComponentFactory ComponentFactory}.\n\t *\n\t * @private\n\t * @param {module:image/imagestyle/imagestyleediting~ImageStyleFormat} style\n\t */\n _createButton(style) {\n const editor = this.editor;\n const componentName = `imageStyle:${ style.name }`;\n editor.ui.componentFactory.add(componentName, locale => {\n const command = editor.commands.get('imageStyle');\n const view = new ButtonView(locale);\n view.set({\n label: style.title,\n icon: style.icon,\n tooltip: true,\n isToggleable: true\n });\n view.bind('isEnabled').to(command, 'isEnabled');\n view.bind('isOn').to(command, 'value', value => value === style.name);\n this.listenTo(view, 'execute', () => editor.execute('imageStyle', { value: style.name }));\n return view;\n });\n }\n}\n/**\n * Returns the translated `title` from the passed styles array.\n *\n * @param {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} styles\n * @param titles\n * @returns {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>}\n */\nfunction translateStyles(styles, titles) {\n for (const style of styles) {\n // Localize the titles of the styles, if a title corresponds with\n // a localized default provided by the plugin.\n if (titles[style.title]) {\n style.title = titles[style.title];\n }\n }\n return styles;\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module widget/widgettoolbarrepository\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport ToolbarView from '@ckeditor/ckeditor5-ui/src/toolbar/toolbarview';\nimport BalloonPanelView from '@ckeditor/ckeditor5-ui/src/panel/balloon/balloonpanelview';\nimport { isWidget } from './utils';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n/**\n * Widget toolbar repository plugin. A central point for registering widget toolbars. This plugin handles the whole\n * toolbar rendering process and exposes a concise API.\n *\n * To add a toolbar for your widget use the {@link ~WidgetToolbarRepository#register `WidgetToolbarRepository#register()`} method.\n *\n * The following example comes from the {@link module:image/imagetoolbar~ImageToolbar} plugin:\n *\n * \t\tclass ImageToolbar extends Plugin {\n *\t\t\tstatic get requires() {\n *\t\t\t\treturn [ WidgetToolbarRepository ];\n *\t\t\t}\n *\n *\t\t\tafterInit() {\n *\t\t\t\tconst editor = this.editor;\n *\t\t\t\tconst widgetToolbarRepository = editor.plugins.get( WidgetToolbarRepository );\n *\n *\t\t\t\twidgetToolbarRepository.register( 'image', {\n *\t\t\t\t\titems: editor.config.get( 'image.toolbar' ),\n *\t\t\t\t\tgetRelatedElement: getSelectedImageWidget\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n */\nexport default class WidgetToolbarRepository extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'WidgetToolbarRepository';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n // Disables the default balloon toolbar for all widgets.\n if (editor.plugins.has('BalloonToolbar')) {\n const balloonToolbar = editor.plugins.get('BalloonToolbar');\n this.listenTo(balloonToolbar, 'show', evt => {\n if (isWidgetSelected(editor.editing.view.document.selection)) {\n evt.stop();\n }\n }, { priority: 'high' });\n }\n /**\n\t\t * A map of toolbar definitions.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map.<String,module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition>} #_toolbarDefinitions\n\t\t */\n this._toolbarDefinitions = new Map();\n /**\n\t\t * @private\n\t\t */\n this._balloon = this.editor.plugins.get('ContextualBalloon');\n this.listenTo(editor.ui, 'update', () => {\n this._updateToolbarsVisibility();\n });\n // UI#update is not fired after focus is back in editor, we need to check if balloon panel should be visible.\n this.listenTo(editor.ui.focusTracker, 'change:isFocused', () => {\n this._updateToolbarsVisibility();\n }, { priority: 'low' });\n }\n destroy() {\n super.destroy();\n for (const toolbarConfig of this._toolbarDefinitions.values()) {\n toolbarConfig.view.destroy();\n }\n }\n /**\n\t * Registers toolbar in the WidgetToolbarRepository. It renders it in the `ContextualBalloon` based on the value of the invoked\n\t * `getRelatedElement` function. Toolbar items are gathered from `items` array.\n\t * The balloon's CSS class is by default `ck-toolbar-container` and may be override with the `balloonClassName` option.\n\t *\n\t * Note: This method should be called in the {@link module:core/plugin~PluginInterface#afterInit `Plugin#afterInit()`}\n\t * callback (or later) to make sure that the given toolbar items were already registered by other plugins.\n\t *\n\t * @param {String} toolbarId An id for the toolbar. Used to\n\t * @param {Object} options\n\t * @param {String} [options.ariaLabel] Label used by assistive technologies to describe this toolbar element.\n\t * @param {Array.<String>} options.items Array of toolbar items.\n\t * @param {Function} options.getRelatedElement Callback which returns an element the toolbar should be attached to.\n\t * @param {String} [options.balloonClassName='ck-toolbar-container'] CSS class for the widget balloon.\n\t */\n register(toolbarId, {ariaLabel, items, getRelatedElement, balloonClassName = 'ck-toolbar-container'}) {\n const editor = this.editor;\n const t = editor.t;\n const toolbarView = new ToolbarView(editor.locale);\n toolbarView.ariaLabel = ariaLabel || t('ax');\n if (this._toolbarDefinitions.has(toolbarId)) {\n /**\n\t\t\t * Toolbar with the given id was already added.\n\t\t\t *\n\t\t\t * @error widget-toolbar-duplicated\n\t\t\t * @param toolbarId Toolbar id.\n\t\t\t */\n throw new CKEditorError('widget-toolbar-duplicated: Toolbar with the given id was already added.', this, { toolbarId });\n }\n toolbarView.fillFromConfig(items, editor.ui.componentFactory);\n this._toolbarDefinitions.set(toolbarId, {\n view: toolbarView,\n getRelatedElement,\n balloonClassName\n });\n }\n /**\n\t * Iterates over stored toolbars and makes them visible or hidden.\n\t *\n\t * @private\n\t */\n _updateToolbarsVisibility() {\n let maxRelatedElementDepth = 0;\n let deepestRelatedElement = null;\n let deepestToolbarDefinition = null;\n for (const definition of this._toolbarDefinitions.values()) {\n const relatedElement = definition.getRelatedElement(this.editor.editing.view.document.selection);\n if (!this.editor.ui.focusTracker.isFocused) {\n if (this._isToolbarVisible(definition)) {\n this._hideToolbar(definition);\n }\n } else if (!relatedElement) {\n if (this._isToolbarInBalloon(definition)) {\n this._hideToolbar(definition);\n }\n } else {\n const relatedElementDepth = relatedElement.getAncestors().length;\n // Many toolbars can express willingness to be displayed but they do not know about\n // each other. Figure out which toolbar is deepest in the view tree to decide which\n // should be displayed. For instance, if a selected image is inside a table cell, display\n // the ImageToolbar rather than the TableToolbar (#60).\n if (relatedElementDepth > maxRelatedElementDepth) {\n maxRelatedElementDepth = relatedElementDepth;\n deepestRelatedElement = relatedElement;\n deepestToolbarDefinition = definition;\n }\n }\n }\n if (deepestToolbarDefinition) {\n this._showToolbar(deepestToolbarDefinition, deepestRelatedElement);\n }\n }\n /**\n\t * Hides the given toolbar.\n\t *\n\t * @private\n\t * @param {module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition} toolbarDefinition\n\t */\n _hideToolbar(toolbarDefinition) {\n this._balloon.remove(toolbarDefinition.view);\n this.stopListening(this._balloon, 'change:visibleView');\n }\n /**\n\t * Shows up the toolbar if the toolbar is not visible.\n\t * Otherwise, repositions the toolbar's balloon when toolbar's view is the most top view in balloon stack.\n\t *\n\t * It might happen here that the toolbar's view is under another view. Then do nothing as the other toolbar view\n\t * should be still visible after the {@link module:core/editor/editorui~EditorUI#event:update}.\n\t *\n\t * @private\n\t * @param {module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition} toolbarDefinition\n\t * @param {module:engine/view/element~Element} relatedElement\n\t */\n _showToolbar(toolbarDefinition, relatedElement) {\n if (this._isToolbarVisible(toolbarDefinition)) {\n repositionContextualBalloon(this.editor, relatedElement);\n } else if (!this._isToolbarInBalloon(toolbarDefinition)) {\n this._balloon.add({\n view: toolbarDefinition.view,\n position: getBalloonPositionData(this.editor, relatedElement),\n balloonClassName: toolbarDefinition.balloonClassName\n });\n // Update toolbar position each time stack with toolbar view is switched to visible.\n // This is in a case target element has changed when toolbar was in invisible stack\n // e.g. target image was wrapped by a block quote.\n // See https://github.com/ckeditor/ckeditor5-widget/issues/92.\n this.listenTo(this._balloon, 'change:visibleView', () => {\n for (const definition of this._toolbarDefinitions.values()) {\n if (this._isToolbarVisible(definition)) {\n const relatedElement = definition.getRelatedElement(this.editor.editing.view.document.selection);\n repositionContextualBalloon(this.editor, relatedElement);\n }\n }\n });\n }\n }\n /**\n\t * @private\n\t * @param {Object} toolbar\n\t * @returns {Boolean}\n\t */\n _isToolbarVisible(toolbar) {\n return this._balloon.visibleView === toolbar.view;\n }\n /**\n\t * @private\n\t * @param {Object} toolbar\n\t * @returns {Boolean}\n\t */\n _isToolbarInBalloon(toolbar) {\n return this._balloon.hasView(toolbar.view);\n }\n}\nfunction repositionContextualBalloon(editor, relatedElement) {\n const balloon = editor.plugins.get('ContextualBalloon');\n const position = getBalloonPositionData(editor, relatedElement);\n balloon.updatePosition(position);\n}\nfunction getBalloonPositionData(editor, relatedElement) {\n const editingView = editor.editing.view;\n const defaultPositions = BalloonPanelView.defaultPositions;\n return {\n target: editingView.domConverter.mapViewToDom(relatedElement),\n positions: [\n defaultPositions.northArrowSouth,\n defaultPositions.northArrowSouthWest,\n defaultPositions.northArrowSouthEast,\n defaultPositions.southArrowNorth,\n defaultPositions.southArrowNorthWest,\n defaultPositions.southArrowNorthEast\n ]\n };\n}\nfunction isWidgetSelected(selection) {\n const viewElement = selection.getSelectedElement();\n return !!(viewElement && isWidget(viewElement));\n} /**\n * The toolbar definition object used by the toolbar repository to manage toolbars.\n * It contains information necessary to display the toolbar in the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon} and\n * update it during its life (display) cycle.\n *\n * @typedef {Object} module:widget/widgettoolbarrepository~WidgetRepositoryToolbarDefinition\n *\n * @property {module:ui/view~View} view The UI view of the toolbar.\n * @property {Function} getRelatedElement A function that returns an engine {@link module:engine/view/view~View}\n * element the toolbar is to be attached to. For instance, an image widget or a table widget (or `null` when\n * there is no such element). The function accepts an instance of {@link module:engine/view/selection~Selection}.\n * @property {String} balloonClassName CSS class for the widget balloon when a toolbar is displayed.\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport Command from './command';\n\n/**\n * @module core/multicommand\n */\n\n/**\n * A CKEditor command that aggregates other commands.\n *\n * This command is used to proxy multiple commands. The multi-command is enabled when\n * at least one of its registered child commands is enabled.\n * When executing a multi-command the first command that is enabled will be executed.\n *\n *\t\tconst multiCommand = new MultiCommand( editor );\n *\n *\t\tconst commandFoo = new Command( editor );\n *\t\tconst commandBar = new Command( editor );\n *\n *\t\t// Register child commands.\n *\t\tmultiCommand.registerChildCommand( commandFoo );\n *\t\tmultiCommand.registerChildCommand( commandBar );\n *\n *\t\t// Enable one of the commands.\n *\t\tcommandBar.isEnabled = true;\n *\n *\t\tmultiCommand.execute(); // Will execute commandBar.\n *\n * @extends module:core/command~Command\n */\nexport default class MultiCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Registered child commands.\n\t\t *\n\t\t * @type {Array.<module:core/command~Command>}\n\t\t * @private\n\t\t */\n\t\tthis._childCommands = [];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\t// Override base command refresh(): the command's state is changed when one of child commands changes states.\n\t}\n\n\t/**\n\t * Executes the first of it registered child commands.\n\t */\n\texecute( ...args ) {\n\t\tconst command = this._getFirstEnabledCommand();\n\n\t\tcommand.execute( args );\n\t}\n\n\t/**\n\t * Registers a child command.\n\t *\n\t * @param {module:core/command~Command} command\n\t */\n\tregisterChildCommand( command ) {\n\t\tthis._childCommands.push( command );\n\n\t\t// Change multi command enabled state when one of registered commands changes state.\n\t\tcommand.on( 'change:isEnabled', () => this._checkEnabled() );\n\n\t\tthis._checkEnabled();\n\t}\n\n\t/**\n\t * Checks if any of child commands is enabled.\n\t *\n\t * @private\n\t */\n\t_checkEnabled() {\n\t\tthis.isEnabled = !!this._getFirstEnabledCommand();\n\t}\n\n\t/**\n\t * Returns a first enabled command or undefined if none of them is enabled.\n\t *\n\t * @returns {module:core/command~Command|undefined}\n\t * @private\n\t */\n\t_getFirstEnabledCommand() {\n\t\treturn this._childCommands.find( command => command.isEnabled );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module indent/indentediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport MultiCommand from '@ckeditor/ckeditor5-core/src/multicommand';\n\n/**\n * The indent editing feature.\n *\n * This plugin registers the `'indent'` and `'outdent'` commands.\n *\n * **Note**: In order for the commands to work, at least one of the compatible features is required. Read more in the\n * {@link module:indent/indent~Indent indent feature} API documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class IndentEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'IndentEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\teditor.commands.add( 'indent', new MultiCommand( editor ) );\n\t\teditor.commands.add( 'outdent', new MultiCommand( editor ) );\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z\\\"/><path d=\\\"M1.632 6.95L5.02 9.358a.4.4 0 0 1-.013.661l-3.39 2.207A.4.4 0 0 1 1 11.892V7.275a.4.4 0 0 1 .632-.326z\\\"/></svg>\\n\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module indent/indentui\n */\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport indentIcon from '../theme/icons/indent.svg';\nimport outdentIcon from '../theme/icons/outdent.svg';\n/**\n * The indent UI feature.\n *\n * This plugin registers the `'indent'` and `'outdent'` buttons.\n *\n * **Note**: In order for the commands to work, at least one of the compatible features is required. Read more in\n * the {@link module:indent/indent~Indent indent feature} API documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class IndentUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'IndentUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const locale = editor.locale;\n const t = editor.t;\n const localizedIndentIcon = locale.uiLanguageDirection == 'ltr' ? indentIcon : outdentIcon;\n const localizedOutdentIcon = locale.uiLanguageDirection == 'ltr' ? outdentIcon : indentIcon;\n this._defineButton('indent', t('k'), localizedIndentIcon);\n this._defineButton('outdent', t('l'), localizedOutdentIcon);\n }\n /**\n\t * Defines a UI button.\n\t *\n\t * @param {String} commandName\n\t * @param {String} label\n\t * @param {String} icon\n\t * @private\n\t */\n _defineButton(commandName, label, icon) {\n const editor = this.editor;\n editor.ui.componentFactory.add(commandName, locale => {\n const command = editor.commands.get(commandName);\n const view = new ButtonView(locale);\n view.set({\n label,\n icon,\n tooltip: true\n });\n view.bind('isOn', 'isEnabled').to(command, 'value', 'isEnabled');\n this.listenTo(view, 'execute', () => editor.execute(commandName));\n return view;\n });\n }\n}","\n/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/clickobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:click Click} event observer.\n *\n * Note that this observer is not available by default. To make it available it needs to be added to\n * {@link module:engine/view/view~View view controller}\n * by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class ClickObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = 'click';\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when one of the editables has been clicked.\n *\n * Introduced by {@link module:engine/view/observer/clickobserver~ClickObserver}.\n *\n * Note that this event is not available by default. To make it available\n * {@link module:engine/view/observer/clickobserver~ClickObserver} needs to be added\n * to {@link module:engine/view/view~View} by a {@link module:engine/view/view~View#addObserver} method.\n *\n * @see module:engine/view/observer/clickobserver~ClickObserver\n * @event module:engine/view/document~Document#event:click\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/ui/linkformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport SwitchButtonView from '@ckeditor/ckeditor5-ui/src/button/switchbuttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../theme/linkform.css';\n/**\n * The link form view controller class.\n *\n * See {@link module:link/ui/linkformview~LinkFormView}.\n *\n * @extends module:ui/view~View\n */\nexport default class LinkFormView extends View {\n /**\n\t * Creates an instance of the {@link module:link/ui/linkformview~LinkFormView} class.\n\t *\n\t * Also see {@link #render}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t * @param {module:utils/collection~Collection} [manualDecorators] Reference to manual decorators in\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n\t */\n constructor(locale, manualDecorators = []) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The URL input view.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t\t */\n this.urlInputView = this._createUrlInput();\n /**\n\t\t * The Save button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * The Cancel button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of {@link module:ui/button/switchbuttonview~SwitchButtonView},\n\t\t * which corresponds to {@link module:link/linkcommand~LinkCommand#manualDecorators manual decorators}\n\t\t * configured in the editor.\n\t\t *\n\t\t * @private\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._manualDecoratorSwitches = this._createManualDecoratorSwitches(manualDecorators);\n /**\n\t\t * A collection of child views in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @type {module:ui/viewcollection~ViewCollection}\n\t\t */\n this.children = this._createFormChildren(manualDecorators);\n /**\n\t\t * A collection of views that can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n const classList = [\n 'ck',\n 'ck-link-form'\n ];\n if (manualDecorators.length) {\n classList.push('ck-link-form_layout-vertical');\n }\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: classList,\n // https://github.com/ckeditor/ckeditor5-link/issues/90\n tabindex: '-1'\n },\n children: this.children\n });\n }\n /**\n\t * Obtains the state of the {@link module:ui/button/switchbuttonview~SwitchButtonView switch buttons} representing\n\t * {@link module:link/linkcommand~LinkCommand#manualDecorators manual link decorators}\n\t * in the {@link module:link/ui/linkformview~LinkFormView}.\n\t *\n\t * @returns {Object.<String,Boolean>} Key-value pairs, where the key is the name of the decorator and the value is\n\t * its state.\n\t */\n getDecoratorSwitchesState() {\n return Array.from(this._manualDecoratorSwitches).reduce((accumulator, switchButton) => {\n accumulator[switchButton.name] = switchButton.isOn;\n return accumulator;\n }, {});\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n submitHandler({ view: this });\n const childViews = [\n this.urlInputView,\n ...this._manualDecoratorSwitches,\n this.saveButtonView,\n this.cancelButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the form.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Creates a labeled input view.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView} Labeled input view instance.\n\t */\n _createUrlInput() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n labeledInput.label = t('bk');\n labeledInput.inputView.placeholder = 'https://example.com';\n return labeledInput;\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n /**\n\t * Populates {@link module:ui/viewcollection~ViewCollection} of {@link module:ui/button/switchbuttonview~SwitchButtonView}\n\t * made based on {@link module:link/linkcommand~LinkCommand#manualDecorators}.\n\t *\n\t * @private\n\t * @param {module:utils/collection~Collection} manualDecorators A reference to the\n\t * collection of manual decorators stored in the link command.\n\t * @returns {module:ui/viewcollection~ViewCollection} of switch buttons.\n\t */\n _createManualDecoratorSwitches(manualDecorators) {\n const switches = this.createCollection();\n for (const manualDecorator of manualDecorators) {\n const switchButton = new SwitchButtonView(this.locale);\n switchButton.set({\n name: manualDecorator.id,\n label: manualDecorator.label,\n withText: true\n });\n switchButton.bind('isOn').to(manualDecorator, 'value');\n switchButton.on('execute', () => {\n manualDecorator.set('value', !switchButton.isOn);\n });\n switches.add(switchButton);\n }\n return switches;\n }\n /**\n\t * Populates the {@link #children} collection of the form.\n\t *\n\t * If {@link module:link/linkcommand~LinkCommand#manualDecorators manual decorators} are configured in the editor, it creates an\n\t * additional `View` wrapping all {@link #_manualDecoratorSwitches} switch buttons corresponding\n\t * to these decorators.\n\t *\n\t * @private\n\t * @param {module:utils/collection~Collection} manualDecorators A reference to\n\t * the collection of manual decorators stored in the link command.\n\t * @returns {module:ui/viewcollection~ViewCollection} The children of link form view.\n\t */\n _createFormChildren(manualDecorators) {\n const children = this.createCollection();\n children.add(this.urlInputView);\n if (manualDecorators.length) {\n const additionalButtonsView = new View();\n additionalButtonsView.setTemplate({\n tag: 'ul',\n children: this._manualDecoratorSwitches.map(switchButton => ({\n tag: 'li',\n children: [switchButton],\n attributes: {\n class: [\n 'ck',\n 'ck-list__item'\n ]\n }\n })),\n attributes: {\n class: [\n 'ck',\n 'ck-reset',\n 'ck-list'\n ]\n }\n });\n children.add(additionalButtonsView);\n }\n children.add(this.saveButtonView);\n children.add(this.cancelButtonView);\n return children;\n }\n} /**\n * Fired when the form view is submitted (when one of the children triggered the submit event),\n * for example with a click on {@link #saveButtonView}.\n *\n * @event submit\n */\n /**\n * Fired when the form view is canceled, for example with a click on {@link #cancelButtonView}.\n *\n * @event cancel\n */","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184zm4.919 10.562l-1.414 1.414a.75.75 0 1 1-1.06-1.06l1.414-1.415-1.415-1.414a.75.75 0 0 1 1.061-1.06l1.414 1.414 1.414-1.415a.75.75 0 0 1 1.061 1.061l-1.414 1.414 1.414 1.415a.75.75 0 0 1-1.06 1.06l-1.415-1.414z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/ui/linkactionsview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport { ensureSafeUrl } from '../utils';\nimport unlinkIcon from '../../theme/icons/unlink.svg';\nimport pencilIcon from '@ckeditor/ckeditor5-core/theme/icons/pencil.svg';\nimport '../../theme/linkactions.css';\n/**\n * The link actions view class. This view displays the link preview, allows\n * unlinking or editing the link.\n *\n * @extends module:ui/view~View\n */\nexport default class LinkActionsView extends View {\n /**\n\t * @inheritDoc\n\t */\n constructor(locale) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the actions.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The href preview view.\n\t\t *\n\t\t * @member {module:ui/view~View}\n\t\t */\n this.previewButtonView = this._createPreviewButton();\n /**\n\t\t * The unlink button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.unlinkButtonView = this._createButton(t('bb'), unlinkIcon, 'unlink');\n /**\n\t\t * The edit link button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.editButtonView = this._createButton(t('bc'), pencilIcon, 'edit');\n /**\n\t\t * The value of the \"href\" attribute of the link to use in the {@link #previewButtonView}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String}\n\t\t */\n this.set('href');\n /**\n\t\t * A collection of views that can be focused in the view.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the view.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n this.setTemplate({\n tag: 'div',\n attributes: {\n class: [\n 'ck',\n 'ck-link-actions'\n ],\n // https://github.com/ckeditor/ckeditor5-link/issues/90\n tabindex: '-1'\n },\n children: [\n this.previewButtonView,\n this.editButtonView,\n this.unlinkButtonView\n ]\n });\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n const childViews = [\n this.previewButtonView,\n this.editButtonView,\n this.unlinkButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the actions.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.delegate('execute').to(this, eventName);\n return button;\n }\n /**\n\t * Creates a link href preview button.\n\t *\n\t * @private\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createPreviewButton() {\n const button = new ButtonView(this.locale);\n const bind = this.bindTemplate;\n const t = this.t;\n button.set({\n withText: true,\n tooltip: t('bd')\n });\n button.extendTemplate({\n attributes: {\n class: [\n 'ck',\n 'ck-link-actions__preview'\n ],\n href: bind.to('href', href => href && ensureSafeUrl(href)),\n target: '_blank',\n rel: 'noopener noreferrer'\n }\n });\n button.bind('label').to(this, 'href', href => {\n return href || t('be');\n });\n button.bind('isEnabled').to(this, 'href', href => !!href);\n button.template.tag = 'a';\n button.template.eventListeners = {};\n return button;\n }\n} /**\n * Fired when the {@link #editButtonView} is clicked.\n *\n * @event edit\n */\n /**\n * Fired when the {@link #unlinkButtonView} is clicked.\n *\n * @event unlink\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module link/linkui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ClickObserver from '@ckeditor/ckeditor5-engine/src/view/observer/clickobserver';\nimport { isLinkElement } from './utils';\nimport ContextualBalloon from '@ckeditor/ckeditor5-ui/src/panel/balloon/contextualballoon';\nimport clickOutsideHandler from '@ckeditor/ckeditor5-ui/src/bindings/clickoutsidehandler';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LinkFormView from './ui/linkformview';\nimport LinkActionsView from './ui/linkactionsview';\nimport linkIcon from '../theme/icons/link.svg';\nconst linkKeystroke = 'Ctrl+K';\n/**\n * The link UI plugin. It introduces the `'link'` and `'unlink'` buttons and support for the <kbd>Ctrl+K</kbd> keystroke.\n *\n * It uses the\n * {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon contextual balloon plugin}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class LinkUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [ContextualBalloon];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'LinkUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n editor.editing.view.addObserver(ClickObserver);\n /**\n\t\t * The actions view displayed inside of the balloon.\n\t\t *\n\t\t * @member {module:link/ui/linkactionsview~LinkActionsView}\n\t\t */\n this.actionsView = this._createActionsView();\n /**\n\t\t * The form view displayed inside the balloon.\n\t\t *\n\t\t * @member {module:link/ui/linkformview~LinkFormView}\n\t\t */\n this.formView = this._createFormView();\n /**\n\t\t * The contextual balloon plugin instance.\n\t\t *\n\t\t * @private\n\t\t * @member {module:ui/panel/balloon/contextualballoon~ContextualBalloon}\n\t\t */\n this._balloon = editor.plugins.get(ContextualBalloon);\n // Create toolbar buttons.\n this._createToolbarLinkButton();\n // Attach lifecycle actions to the the balloon.\n this._enableUserBalloonInteractions();\n }\n /**\n\t * @inheritDoc\n\t */\n destroy() {\n super.destroy();\n // Destroy created UI components as they are not automatically destroyed (see ckeditor5#1341).\n this.formView.destroy();\n }\n /**\n\t * Creates the {@link module:link/ui/linkactionsview~LinkActionsView} instance.\n\t *\n\t * @private\n\t * @returns {module:link/ui/linkactionsview~LinkActionsView} The link actions view instance.\n\t */\n _createActionsView() {\n const editor = this.editor;\n const actionsView = new LinkActionsView(editor.locale);\n const linkCommand = editor.commands.get('link');\n const unlinkCommand = editor.commands.get('unlink');\n actionsView.bind('href').to(linkCommand, 'value');\n actionsView.editButtonView.bind('isEnabled').to(linkCommand);\n actionsView.unlinkButtonView.bind('isEnabled').to(unlinkCommand);\n // Execute unlink command after clicking on the \"Edit\" button.\n this.listenTo(actionsView, 'edit', () => {\n this._addFormView();\n });\n // Execute unlink command after clicking on the \"Unlink\" button.\n this.listenTo(actionsView, 'unlink', () => {\n editor.execute('unlink');\n this._hideUI();\n });\n // Close the panel on esc key press when the **actions have focus**.\n actionsView.keystrokes.set('Esc', (data, cancel) => {\n this._hideUI();\n cancel();\n });\n // Open the form view on Ctrl+K when the **actions have focus**..\n actionsView.keystrokes.set(linkKeystroke, (data, cancel) => {\n this._addFormView();\n cancel();\n });\n return actionsView;\n }\n /**\n\t * Creates the {@link module:link/ui/linkformview~LinkFormView} instance.\n\t *\n\t * @private\n\t * @returns {module:link/ui/linkformview~LinkFormView} The link form view instance.\n\t */\n _createFormView() {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n const formView = new LinkFormView(editor.locale, linkCommand.manualDecorators);\n formView.urlInputView.bind('value').to(linkCommand, 'value');\n // Form elements should be read-only when corresponding commands are disabled.\n formView.urlInputView.bind('isReadOnly').to(linkCommand, 'isEnabled', value => !value);\n formView.saveButtonView.bind('isEnabled').to(linkCommand);\n // Execute link command after clicking the \"Save\" button.\n this.listenTo(formView, 'submit', () => {\n editor.execute('link', formView.urlInputView.inputView.element.value, formView.getDecoratorSwitchesState());\n this._closeFormView();\n });\n // Hide the panel after clicking the \"Cancel\" button.\n this.listenTo(formView, 'cancel', () => {\n this._closeFormView();\n });\n // Close the panel on esc key press when the **form has focus**.\n formView.keystrokes.set('Esc', (data, cancel) => {\n this._closeFormView();\n cancel();\n });\n return formView;\n }\n /**\n\t * Creates a toolbar Link button. Clicking this button will show\n\t * a {@link #_balloon} attached to the selection.\n\t *\n\t * @private\n\t */\n _createToolbarLinkButton() {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n const t = editor.t;\n // Handle the `Ctrl+K` keystroke and show the panel.\n editor.keystrokes.set(linkKeystroke, (keyEvtData, cancel) => {\n // Prevent focusing the search bar in FF and opening new tab in Edge. #153, #154.\n cancel();\n if (linkCommand.isEnabled) {\n this._showUI(true);\n }\n });\n editor.ui.componentFactory.add('link', locale => {\n const button = new ButtonView(locale);\n button.isEnabled = true;\n button.label = t('as');\n button.icon = linkIcon;\n button.keystroke = linkKeystroke;\n button.tooltip = true;\n button.isToggleable = true;\n // Bind button to the command.\n button.bind('isEnabled').to(linkCommand, 'isEnabled');\n button.bind('isOn').to(linkCommand, 'value', value => !!value);\n // Show the panel on button click.\n this.listenTo(button, 'execute', () => this._showUI(true));\n return button;\n });\n }\n /**\n\t * Attaches actions that control whether the balloon panel containing the\n\t * {@link #formView} is visible or not.\n\t *\n\t * @private\n\t */\n _enableUserBalloonInteractions() {\n const viewDocument = this.editor.editing.view.document;\n // Handle click on view document and show panel when selection is placed inside the link element.\n // Keep panel open until selection will be inside the same link element.\n this.listenTo(viewDocument, 'click', () => {\n const parentLink = this._getSelectedLinkElement();\n if (parentLink) {\n // Then show panel but keep focus inside editor editable.\n this._showUI();\n }\n });\n // Focus the form if the balloon is visible and the Tab key has been pressed.\n this.editor.keystrokes.set('Tab', (data, cancel) => {\n if (this._areActionsVisible && !this.actionsView.focusTracker.isFocused) {\n this.actionsView.focus();\n cancel();\n }\n }, {\n // Use the high priority because the link UI navigation is more important\n // than other feature's actions, e.g. list indentation.\n // https://github.com/ckeditor/ckeditor5-link/issues/146\n priority: 'high'\n });\n // Close the panel on the Esc key press when the editable has focus and the balloon is visible.\n this.editor.keystrokes.set('Esc', (data, cancel) => {\n if (this._isUIVisible) {\n this._hideUI();\n cancel();\n }\n });\n // Close on click outside of balloon panel element.\n clickOutsideHandler({\n emitter: this.formView,\n activator: () => this._isUIInPanel,\n contextElements: [this._balloon.view.element],\n callback: () => this._hideUI()\n });\n }\n /**\n\t * Adds the {@link #actionsView} to the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _addActionsView() {\n if (this._areActionsInPanel) {\n return;\n }\n this._balloon.add({\n view: this.actionsView,\n position: this._getBalloonPositionData()\n });\n }\n /**\n\t * Adds the {@link #formView} to the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _addFormView() {\n if (this._isFormInPanel) {\n return;\n }\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n this._balloon.add({\n view: this.formView,\n position: this._getBalloonPositionData()\n });\n // Select input when form view is currently visible.\n if (this._balloon.visibleView === this.formView) {\n this.formView.urlInputView.select();\n }\n // Make sure that each time the panel shows up, the URL field remains in sync with the value of\n // the command. If the user typed in the input, then canceled the balloon (`urlInputView#value` stays\n // unaltered) and re-opened it without changing the value of the link command (e.g. because they\n // clicked the same link), they would see the old value instead of the actual value of the command.\n // https://github.com/ckeditor/ckeditor5-link/issues/78\n // https://github.com/ckeditor/ckeditor5-link/issues/123\n this.formView.urlInputView.inputView.element.value = linkCommand.value || '';\n }\n /**\n\t * Closes the form view. Decides whether the balloon should be hidden completely or if the action view should be shown. This is\n\t * decided upon the link command value (which has a value if the document selection is in the link).\n\t *\n\t * Additionally, if any {@link module:link/link~LinkConfig#decorators} are defined in the editor configuration, the state of\n\t * switch buttons responsible for manual decorator handling is restored.\n\t *\n\t * @private\n\t */\n _closeFormView() {\n const linkCommand = this.editor.commands.get('link');\n // Restore manual decorator states to represent the current model state. This case is important to reset the switch buttons\n // when the user cancels the editing form.\n linkCommand.restoreManualDecoratorStates();\n if (linkCommand.value !== undefined) {\n this._removeFormView();\n } else {\n this._hideUI();\n }\n }\n /**\n\t * Removes the {@link #formView} from the {@link #_balloon}.\n\t *\n\t * @protected\n\t */\n _removeFormView() {\n if (this._isFormInPanel) {\n // Blur the input element before removing it from DOM to prevent issues in some browsers.\n // See https://github.com/ckeditor/ckeditor5/issues/1501.\n this.formView.saveButtonView.focus();\n this._balloon.remove(this.formView);\n // Because the form has an input which has focus, the focus must be brought back\n // to the editor. Otherwise, it would be lost.\n this.editor.editing.view.focus();\n }\n }\n /**\n\t * Shows the correct UI type for the current state of the command. It is either\n\t * {@link #formView} or {@link #actionsView}.\n\t *\n\t * @param {Boolean} forceVisible\n\t * @private\n\t */\n _showUI(forceVisible = false) {\n const editor = this.editor;\n const linkCommand = editor.commands.get('link');\n if (!linkCommand.isEnabled) {\n return;\n }\n // When there's no link under the selection, go straight to the editing UI.\n if (!this._getSelectedLinkElement()) {\n this._addActionsView();\n // Be sure panel with link is visible.\n if (forceVisible) {\n this._balloon.showStack('main');\n }\n this._addFormView();\n } // If there's a link under the selection...\n else {\n // Go to the editing UI if actions are already visible.\n if (this._areActionsVisible) {\n this._addFormView();\n } // Otherwise display just the actions UI.\n else {\n this._addActionsView();\n }\n // Be sure panel with link is visible.\n if (forceVisible) {\n this._balloon.showStack('main');\n }\n }\n // Begin responding to ui#update once the UI is added.\n this._startUpdatingUI();\n }\n /**\n\t * Removes the {@link #formView} from the {@link #_balloon}.\n\t *\n\t * See {@link #_addFormView}, {@link #_addActionsView}.\n\t *\n\t * @protected\n\t */\n _hideUI() {\n if (!this._isUIInPanel) {\n return;\n }\n const editor = this.editor;\n this.stopListening(editor.ui, 'update');\n this.stopListening(this._balloon, 'change:visibleView');\n // Make sure the focus always gets back to the editable _before_ removing the focused form view.\n // Doing otherwise causes issues in some browsers. See https://github.com/ckeditor/ckeditor5-link/issues/193.\n editor.editing.view.focus();\n // Remove form first because it's on top of the stack.\n this._removeFormView();\n // Then remove the actions view because it's beneath the form.\n this._balloon.remove(this.actionsView);\n }\n /**\n\t * Makes the UI react to the {@link module:core/editor/editorui~EditorUI#event:update} event to\n\t * reposition itself when the editor UI should be refreshed.\n\t *\n\t * See: {@link #_hideUI} to learn when the UI stops reacting to the `update` event.\n\t *\n\t * @protected\n\t */\n _startUpdatingUI() {\n const editor = this.editor;\n const viewDocument = editor.editing.view.document;\n let prevSelectedLink = this._getSelectedLinkElement();\n let prevSelectionParent = getSelectionParent();\n const update = () => {\n const selectedLink = this._getSelectedLinkElement();\n const selectionParent = getSelectionParent();\n // Hide the panel if:\n //\n // * the selection went out of the EXISTING link element. E.g. user moved the caret out\n // of the link,\n // * the selection went to a different parent when creating a NEW link. E.g. someone\n // else modified the document.\n // * the selection has expanded (e.g. displaying link actions then pressing SHIFT+Right arrow).\n //\n // Note: #_getSelectedLinkElement will return a link for a non-collapsed selection only\n // when fully selected.\n if (prevSelectedLink && !selectedLink || !prevSelectedLink && selectionParent !== prevSelectionParent) {\n this._hideUI();\n } // Update the position of the panel when:\n // * link panel is in the visible stack\n // * the selection remains in the original link element,\n // * there was no link element in the first place, i.e. creating a new link\n else if (this._isUIVisible) {\n // If still in a link element, simply update the position of the balloon.\n // If there was no link (e.g. inserting one), the balloon must be moved\n // to the new position in the editing view (a new native DOM range).\n this._balloon.updatePosition(this._getBalloonPositionData());\n }\n prevSelectedLink = selectedLink;\n prevSelectionParent = selectionParent;\n };\n function getSelectionParent() {\n return viewDocument.selection.focus.getAncestors().reverse().find(node => node.is('element'));\n }\n this.listenTo(editor.ui, 'update', update);\n this.listenTo(this._balloon, 'change:visibleView', update);\n }\n /**\n\t * Returns `true` when {@link #formView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isFormInPanel() {\n return this._balloon.hasView(this.formView);\n }\n /**\n\t * Returns `true` when {@link #actionsView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _areActionsInPanel() {\n return this._balloon.hasView(this.actionsView);\n }\n /**\n\t * Returns `true` when {@link #actionsView} is in the {@link #_balloon} and it is\n\t * currently visible.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _areActionsVisible() {\n return this._balloon.visibleView === this.actionsView;\n }\n /**\n\t * Returns `true` when {@link #actionsView} or {@link #formView} is in the {@link #_balloon}.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isUIInPanel() {\n return this._isFormInPanel || this._areActionsInPanel;\n }\n /**\n\t * Returns `true` when {@link #actionsView} or {@link #formView} is in the {@link #_balloon} and it is\n\t * currently visible.\n\t *\n\t * @readonly\n\t * @protected\n\t * @type {Boolean}\n\t */\n get _isUIVisible() {\n const visibleView = this._balloon.visibleView;\n return visibleView == this.formView || this._areActionsVisible;\n }\n /**\n\t * Returns positioning options for the {@link #_balloon}. They control the way the balloon is attached\n\t * to the target element or selection.\n\t *\n\t * If the selection is collapsed and inside a link element, the panel will be attached to the\n\t * entire link element. Otherwise, it will be attached to the selection.\n\t *\n\t * @private\n\t * @returns {module:utils/dom/position~Options}\n\t */\n _getBalloonPositionData() {\n const view = this.editor.editing.view;\n const viewDocument = view.document;\n const targetLink = this._getSelectedLinkElement();\n const target = targetLink ? // When selection is inside link element, then attach panel to this element.\n view.domConverter.mapViewToDom(targetLink) : // Otherwise attach panel to the selection.\n view.domConverter.viewRangeToDom(viewDocument.selection.getFirstRange());\n return { target };\n }\n /**\n\t * Returns the link {@link module:engine/view/attributeelement~AttributeElement} under\n\t * the {@link module:engine/view/document~Document editing view's} selection or `null`\n\t * if there is none.\n\t *\n\t * **Note**: For a non–collapsed selection, the link element is only returned when **fully**\n\t * selected and the **only** element within the selection boundaries.\n\t *\n\t * @private\n\t * @returns {module:engine/view/attributeelement~AttributeElement|null}\n\t */\n _getSelectedLinkElement() {\n const view = this.editor.editing.view;\n const selection = view.document.selection;\n if (selection.isCollapsed) {\n return findLinkElementAncestor(selection.getFirstPosition());\n } else {\n // The range for fully selected link is usually anchored in adjacent text nodes.\n // Trim it to get closer to the actual link element.\n const range = selection.getFirstRange().getTrimmed();\n const startLink = findLinkElementAncestor(range.start);\n const endLink = findLinkElementAncestor(range.end);\n if (!startLink || startLink != endLink) {\n return null;\n }\n // Check if the link element is fully selected.\n if (view.createRangeIn(startLink).getTrimmed().isEqual(range)) {\n return startLink;\n } else {\n return null;\n }\n }\n }\n}\n// Returns a link element if there's one among the ancestors of the provided `Position`.\n//\n// @private\n// @param {module:engine/view/position~Position} View position to analyze.\n// @returns {module:engine/view/attributeelement~AttributeElement|null} Link element at the position or null.\nfunction findLinkElementAncestor(position) {\n return position.getAncestors().find(ancestor => isLinkElement(ancestor));\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/listcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The list command. It is used by the {@link module:list/list~List list feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class ListCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {'numbered'|'bulleted'} type List type that will be handled by this command.\n\t */\n\tconstructor( editor, type ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The type of the list created by the command.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'numbered'|'bulleted'|'todo'}\n\t\t */\n\t\tthis.type = type;\n\n\t\t/**\n\t\t * A flag indicating whether the command is active, which means that the selection starts in a list of the same type.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.value = this._getValue();\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * @protected\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst blocks = Array.from( document.selection.getSelectedBlocks() )\n\t\t\t.filter( block => checkCanBecomeListItem( block, model.schema ) );\n\n\t\t// Whether we are turning off some items.\n\t\tconst turnOff = this.value === true;\n\t\t// If we are turning off items, we are going to rename them to paragraphs.\n\n\t\tmodel.change( writer => {\n\t\t\t// If part of a list got turned off, we need to handle (outdent) all of sub-items of the last turned-off item.\n\t\t\t// To be sure that model is all the time in a good state, we first fix items below turned-off item.\n\t\t\tif ( turnOff ) {\n\t\t\t\t// Start from the model item that is just after the last turned-off item.\n\t\t\t\tlet next = blocks[ blocks.length - 1 ].nextSibling;\n\t\t\t\tlet currentIndent = Number.POSITIVE_INFINITY;\n\t\t\t\tlet changes = [];\n\n\t\t\t\t// Correct indent of all items after the last turned off item.\n\t\t\t\t// Rules that should be followed:\n\t\t\t\t// 1. All direct sub-items of turned-off item should become indent 0, because the first item after it\n\t\t\t\t// will be the first item of a new list. Other items are at the same level, so should have same 0 index.\n\t\t\t\t// 2. All items with indent lower than indent of turned-off item should become indent 0, because they\n\t\t\t\t// should not end up as a child of any of list items that they were not children of before.\n\t\t\t\t// 3. All other items should have their indent changed relatively to it's parent.\n\t\t\t\t//\n\t\t\t\t// For example:\n\t\t\t\t// 1 * --------\n\t\t\t\t// 2 * --------\n\t\t\t\t// 3 * --------\t\t\t<-- this is turned off.\n\t\t\t\t// 4 * --------\t\t<-- this has to become indent = 0, because it will be first item on a new list.\n\t\t\t\t// 5 * --------\t<-- this should be still be a child of item above, so indent = 1.\n\t\t\t\t// 6 * --------\t\t\t<-- this has to become indent = 0, because it should not be a child of any of items above.\n\t\t\t\t// 7 * --------\t\t<-- this should be still be a child of item above, so indent = 1.\n\t\t\t\t// 8 * --------\t\t\t\t<-- this has to become indent = 0.\n\t\t\t\t// 9 * --------\t\t\t<-- this should still be a child of item above, so indent = 1.\n\t\t\t\t// 10 * --------\t\t<-- this should still be a child of item above, so indent = 2.\n\t\t\t\t// 11 * --------\t\t<-- this should still be at the same level as item above, so indent = 2.\n\t\t\t\t// 12 * --------\t\t\t\t<-- this and all below are left unchanged.\n\t\t\t\t// 13 * --------\n\t\t\t\t// 14 * --------\n\t\t\t\t//\n\t\t\t\t// After turning off 3 the list becomes:\n\t\t\t\t//\n\t\t\t\t// 1 * --------\n\t\t\t\t// 2 * --------\n\t\t\t\t//\n\t\t\t\t// 3 --------\n\t\t\t\t//\n\t\t\t\t// 4 * --------\n\t\t\t\t// 5 * --------\n\t\t\t\t// 6 * --------\n\t\t\t\t// 7 * --------\n\t\t\t\t// 8 * --------\n\t\t\t\t// 9 * --------\n\t\t\t\t// 10 * --------\n\t\t\t\t// 11 * --------\n\t\t\t\t// 12 * --------\n\t\t\t\t// 13 * --------\n\t\t\t\t// 14 * --------\n\t\t\t\t//\n\t\t\t\t// Thanks to this algorithm no lists are mismatched and no items get unexpected children/parent, while\n\t\t\t\t// those parent-child connection which are possible to maintain are still maintained. It's worth noting\n\t\t\t\t// that this is the same effect that we would be get by multiple use of outdent command. However doing\n\t\t\t\t// it like this is much more efficient because it's less operation (less memory usage, easier OT) and\n\t\t\t\t// less conversion (faster).\n\t\t\t\twhile ( next && next.name == 'listItem' && next.getAttribute( 'listIndent' ) !== 0 ) {\n\t\t\t\t\t// Check each next list item, as long as its indent is bigger than 0.\n\t\t\t\t\t// If the indent is 0 we are not going to change anything anyway.\n\t\t\t\t\tconst indent = next.getAttribute( 'listIndent' );\n\n\t\t\t\t\t// We check if that's item indent is lower as current relative indent.\n\t\t\t\t\tif ( indent < currentIndent ) {\n\t\t\t\t\t\t// If it is, current relative indent becomes that indent.\n\t\t\t\t\t\tcurrentIndent = indent;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Fix indent relatively to current relative indent.\n\t\t\t\t\t// Note, that if we just changed the current relative indent, the newIndent will be equal to 0.\n\t\t\t\t\tconst newIndent = indent - currentIndent;\n\n\t\t\t\t\t// Save the entry in changes array. We do not apply it at the moment, because we will need to\n\t\t\t\t\t// reverse the changes so the last item is changed first.\n\t\t\t\t\t// This is to keep model in correct state all the time.\n\t\t\t\t\tchanges.push( { element: next, listIndent: newIndent } );\n\n\t\t\t\t\t// Find next item.\n\t\t\t\t\tnext = next.nextSibling;\n\t\t\t\t}\n\n\t\t\t\tchanges = changes.reverse();\n\n\t\t\t\tfor ( const item of changes ) {\n\t\t\t\t\twriter.setAttribute( 'listIndent', item.listIndent, item.element );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// If we are turning on, we might change some items that are already `listItem`s but with different type.\n\t\t\t// Changing one nested list item to other type should also trigger changing all its siblings so the\n\t\t\t// whole nested list is of the same type.\n\t\t\t// Example (assume changing to numbered list):\n\t\t\t// * ------\t\t\t\t<-- do not fix, top level item\n\t\t\t// * ------\t\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ------\t\t<-- do not fix, item is not affected (different list)\n\t\t\t// * ------\t\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ------\t\t<-- fix, because latter list item of this item's list is changed\n\t\t\t// * ---[--\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t\t<-- already in selection, but does not cause other list items to change because is top-level\n\t\t\t// * ---]--\t\t\t<-- already in selection\n\t\t\t// * ------\t\t\t<-- fix, because preceding list item of this item's list is changed\n\t\t\t// * ------\t\t<-- do not fix, item is not affected (different list)\n\t\t\t// * ------\t\t\t\t<-- do not fix, top level item\n\t\t\tif ( !turnOff ) {\n\t\t\t\t// Find lowest indent among selected items. This will be indicator what is the indent of\n\t\t\t\t// top-most list affected by the command.\n\t\t\t\tlet lowestIndent = Number.POSITIVE_INFINITY;\n\n\t\t\t\tfor ( const item of blocks ) {\n\t\t\t\t\tif ( item.is( 'listItem' ) && item.getAttribute( 'listIndent' ) < lowestIndent ) {\n\t\t\t\t\t\tlowestIndent = item.getAttribute( 'listIndent' );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Do not execute the fix for top-level lists.\n\t\t\t\tlowestIndent = lowestIndent === 0 ? 1 : lowestIndent;\n\n\t\t\t\t// Fix types of list items that are \"before\" the selected blocks.\n\t\t\t\t_fixType( blocks, true, lowestIndent );\n\n\t\t\t\t// Fix types of list items that are \"after\" the selected blocks.\n\t\t\t\t_fixType( blocks, false, lowestIndent );\n\t\t\t}\n\n\t\t\t// Phew! Now it will be easier :).\n\t\t\t// For each block element that was in the selection, we will either: turn it to list item,\n\t\t\t// turn it to paragraph, or change it's type. Or leave it as it is.\n\t\t\t// Do it in reverse as there might be multiple blocks (same as with changing indents).\n\t\t\tfor ( const element of blocks.reverse() ) {\n\t\t\t\tif ( turnOff && element.name == 'listItem' ) {\n\t\t\t\t\t// We are turning off and the element is a `listItem` - it should be converted to `paragraph`.\n\t\t\t\t\t// List item specific attributes are removed by post fixer.\n\t\t\t\t\twriter.rename( element, 'paragraph' );\n\t\t\t\t} else if ( !turnOff && element.name != 'listItem' ) {\n\t\t\t\t\t// We are turning on and the element is not a `listItem` - it should be converted to `listItem`.\n\t\t\t\t\t// The order of operations is important to keep model in correct state.\n\t\t\t\t\twriter.setAttributes( { listType: this.type, listIndent: 0 }, element );\n\t\t\t\t\twriter.rename( element, 'listItem' );\n\t\t\t\t} else if ( !turnOff && element.name == 'listItem' && element.getAttribute( 'listType' ) != this.type ) {\n\t\t\t\t\t// We are turning on and the element is a `listItem` but has different type - change it's type and\n\t\t\t\t\t// type of it's all siblings that have same indent.\n\t\t\t\t\twriter.setAttribute( 'listType', this.type, element );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks the command's {@link #value}.\n\t *\n\t * @private\n\t * @returns {Boolean} The current value.\n\t */\n\t_getValue() {\n\t\t// Check whether closest `listItem` ancestor of the position has a correct type.\n\t\tconst listItem = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\treturn !!listItem && listItem.is( 'listItem' ) && listItem.getAttribute( 'listType' ) == this.type;\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\t// If command value is true it means that we are in list item, so the command should be enabled.\n\t\tif ( this.value ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tconst selection = this.editor.model.document.selection;\n\t\tconst schema = this.editor.model.schema;\n\n\t\tconst firstBlock = first( selection.getSelectedBlocks() );\n\n\t\tif ( !firstBlock ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Otherwise, check if list item can be inserted at the position start.\n\t\treturn checkCanBecomeListItem( firstBlock, schema );\n\t}\n}\n\n// Helper function used when one or more list item have their type changed. Fixes type of other list items\n// that are affected by the change (are in same lists) but are not directly in selection. The function got extracted\n// not to duplicated code, as same fix has to be performed before and after selection.\n//\n// @param {Array.<module:engine/model/node~Node>} blocks Blocks that are in selection.\n// @param {Boolean} isBackward Specified whether fix will be applied for blocks before first selected block (`true`)\n// or blocks after last selected block (`false`).\n// @param {Number} lowestIndent Lowest indent among selected blocks.\nfunction _fixType( blocks, isBackward, lowestIndent ) {\n\t// We need to check previous sibling of first changed item and next siblings of last changed item.\n\tconst startingItem = isBackward ? blocks[ 0 ] : blocks[ blocks.length - 1 ];\n\n\tif ( startingItem.is( 'listItem' ) ) {\n\t\tlet item = startingItem[ isBackward ? 'previousSibling' : 'nextSibling' ];\n\t\t// During processing items, keeps the lowest indent of already processed items.\n\t\t// This saves us from changing too many items.\n\t\t// Following example is for going forward as it is easier to read, however same applies to going backward.\n\t\t// * ------\n\t\t// * ------\n\t\t// * --[---\n\t\t// * ------\t\t<-- `lowestIndent` should be 1\n\t\t// * --]---\t\t<-- `startingItem`, `currentIndent` = 2, `lowestIndent` == 1\n\t\t// * ------\t\t<-- should be fixed, `indent` == 2 == `currentIndent`\n\t\t// * ------\t\t<-- should be fixed, set `currentIndent` to 1, `indent` == 1 == `currentIndent`\n\t\t// * ------\t\t<-- should not be fixed, item is in different list, `indent` = 2, `indent` != `currentIndent`\n\t\t// * ------\t\t<-- should be fixed, `indent` == 1 == `currentIndent`\n\t\t// * ------\t\t\t<-- break loop (`indent` < `lowestIndent`)\n\t\tlet currentIndent = startingItem.getAttribute( 'listIndent' );\n\n\t\t// Look back until a list item with indent lower than reference `lowestIndent`.\n\t\t// That would be the parent of nested sublist which contains item having `lowestIndent`.\n\t\twhile ( item && item.is( 'listItem' ) && item.getAttribute( 'listIndent' ) >= lowestIndent ) {\n\t\t\tif ( currentIndent > item.getAttribute( 'listIndent' ) ) {\n\t\t\t\tcurrentIndent = item.getAttribute( 'listIndent' );\n\t\t\t}\n\n\t\t\t// Found an item that is in the same nested sublist.\n\t\t\tif ( item.getAttribute( 'listIndent' ) == currentIndent ) {\n\t\t\t\t// Just add the item to selected blocks like it was selected by the user.\n\t\t\t\tblocks[ isBackward ? 'unshift' : 'push' ]( item );\n\t\t\t}\n\n\t\t\titem = item[ isBackward ? 'previousSibling' : 'nextSibling' ];\n\t\t}\n\t}\n}\n\n// Checks whether the given block can be replaced by a listItem.\n//\n// @private\n// @param {module:engine/model/element~Element} block A block to be tested.\n// @param {module:engine/model/schema~Schema} schema The schema of the document.\n// @returns {Boolean}\nfunction checkCanBecomeListItem( block, schema ) {\n\treturn schema.checkChild( block.parent, 'listItem' ) && !schema.isObject( block );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/indentcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport first from '@ckeditor/ckeditor5-utils/src/first';\n\n/**\n * The list indent command. It is used by the {@link module:list/list~List list feature}.\n *\n * @extends module:core/command~Command\n */\nexport default class IndentCommand extends Command {\n\t/**\n\t * Creates an instance of the command.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor instance.\n\t * @param {'forward'|'backward'} indentDirection The direction of indent. If it is equal to `backward`, the command\n\t * will outdent a list item.\n\t */\n\tconstructor( editor, indentDirection ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * Determines by how much the command will change the list item's indent attribute.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Number}\n\t\t */\n\t\tthis._indentBy = indentDirection == 'forward' ? 1 : -1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tthis.isEnabled = this._checkEnabled();\n\t}\n\n\t/**\n\t * Indents or outdents (depending on the {@link #constructor}'s `indentDirection` parameter) selected list items.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tlet itemsToChange = Array.from( doc.selection.getSelectedBlocks() );\n\n\t\tmodel.change( writer => {\n\t\t\tconst lastItem = itemsToChange[ itemsToChange.length - 1 ];\n\n\t\t\t// Indenting a list item should also indent all the items that are already sub-items of indented item.\n\t\t\tlet next = lastItem.nextSibling;\n\n\t\t\t// Check all items after last indented item, as long as their indent is bigger than indent of that item.\n\t\t\twhile ( next && next.name == 'listItem' && next.getAttribute( 'listIndent' ) > lastItem.getAttribute( 'listIndent' ) ) {\n\t\t\t\titemsToChange.push( next );\n\n\t\t\t\tnext = next.nextSibling;\n\t\t\t}\n\n\t\t\t// We need to be sure to keep model in correct state after each small change, because converters\n\t\t\t// bases on that state and assumes that model is correct.\n\t\t\t// Because of that, if the command outdents items, we will outdent them starting from the last item, as\n\t\t\t// it is safer.\n\t\t\tif ( this._indentBy < 0 ) {\n\t\t\t\titemsToChange = itemsToChange.reverse();\n\t\t\t}\n\n\t\t\tfor ( const item of itemsToChange ) {\n\t\t\t\tconst indent = item.getAttribute( 'listIndent' ) + this._indentBy;\n\n\t\t\t\t// If indent is lower than 0, it means that the item got outdented when it was not indented.\n\t\t\t\t// This means that we need to convert that list item to paragraph.\n\t\t\t\tif ( indent < 0 ) {\n\t\t\t\t\t// To keep the model as correct as possible, first rename listItem, then remove attributes,\n\t\t\t\t\t// as listItem without attributes is very incorrect and will cause problems in converters.\n\t\t\t\t\t// No need to remove attributes, will be removed by post fixer.\n\t\t\t\t\twriter.rename( item, 'paragraph' );\n\t\t\t\t}\n\t\t\t\t// If indent is >= 0, change the attribute value.\n\t\t\t\telse {\n\t\t\t\t\twriter.setAttribute( 'listIndent', indent, item );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Checks whether the command can be enabled in the current context.\n\t *\n\t * @private\n\t * @returns {Boolean} Whether the command should be enabled.\n\t */\n\t_checkEnabled() {\n\t\t// Check whether any of position's ancestor is a list item.\n\t\tconst listItem = first( this.editor.model.document.selection.getSelectedBlocks() );\n\n\t\t// If selection is not in a list item, the command is disabled.\n\t\tif ( !listItem || !listItem.is( 'listItem' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this._indentBy > 0 ) {\n\t\t\t// Cannot indent first item in it's list. Check if before `listItem` is a list item that is in same list.\n\t\t\t// To be in the same list, the item has to have same attributes and cannot be \"split\" by an item with lower indent.\n\t\t\tconst indent = listItem.getAttribute( 'listIndent' );\n\t\t\tconst type = listItem.getAttribute( 'listType' );\n\n\t\t\tlet prev = listItem.previousSibling;\n\n\t\t\twhile ( prev && prev.is( 'listItem' ) && prev.getAttribute( 'listIndent' ) >= indent ) {\n\t\t\t\tif ( prev.getAttribute( 'listIndent' ) == indent ) {\n\t\t\t\t\t// The item is on the same level.\n\t\t\t\t\t// If it has same type, it means that we found a preceding sibling from the same list.\n\t\t\t\t\t// If it does not have same type, it means that `listItem` is on different list (this can happen only\n\t\t\t\t\t// on top level lists, though).\n\t\t\t\t\treturn prev.getAttribute( 'listType' ) == type;\n\t\t\t\t}\n\n\t\t\t\tprev = prev.previousSibling;\n\t\t\t}\n\n\t\t\t// Could not find similar list item, this means that `listItem` is first in its list.\n\t\t\treturn false;\n\t\t}\n\n\t\t// If we are outdenting it is enough to be in list item. Every list item can always be outdented.\n\t\treturn true;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/utils\n */\n\nimport { getFillerOffset } from '@ckeditor/ckeditor5-engine/src/view/containerelement';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\n\n/**\n * Creates a list item {@link module:engine/view/containerelement~ContainerElement}.\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer The writer instance.\n * @returns {module:engine/view/containerelement~ContainerElement}\n */\nexport function createViewListItemElement( writer ) {\n\tconst viewItem = writer.createContainerElement( 'li' );\n\n\tviewItem.getFillerOffset = getListItemFillerOffset;\n\n\treturn viewItem;\n}\n\n/**\n * Helper function that creates a `<ul><li></li></ul>` or (`<ol>`) structure out of the given `modelItem` model `listItem` element.\n * Then, it binds the created view list item (<li>) with the model `listItem` element.\n * The function then returns the created view list item (<li>).\n *\n * @param {module:engine/model/item~Item} modelItem Model list item.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface.\n * @returns {module:engine/view/containerelement~ContainerElement} View list element.\n */\nexport function generateLiInUl( modelItem, conversionApi ) {\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\tconst listType = modelItem.getAttribute( 'listType' ) == 'numbered' ? 'ol' : 'ul';\n\tconst viewItem = createViewListItemElement( viewWriter );\n\n\tconst viewList = viewWriter.createContainerElement( listType, null );\n\n\tviewWriter.insert( viewWriter.createPositionAt( viewList, 0 ), viewItem );\n\n\tmapper.bindElements( modelItem, viewItem );\n\n\treturn viewItem;\n}\n\n/**\n * Helper function that inserts a view list at a correct place and merges it with its siblings.\n * It takes a model list item element (`modelItem`) and a corresponding view list item element (`injectedItem`). The view list item\n * should be in a view list element (`<ul>` or `<ol>`) and should be its only child.\n * See comments below to better understand the algorithm.\n *\n * @param {module:engine/view/item~Item} modelItem Model list item.\n * @param {module:engine/view/containerelement~ContainerElement} injectedItem\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface.\n * @param {module:engine/model/model~Model} model The model instance.\n */\nexport function injectViewList( modelItem, injectedItem, conversionApi, model ) {\n\tconst injectedList = injectedItem.parent;\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\n\t// The position where the view list will be inserted.\n\tlet insertPosition = mapper.toViewPosition( model.createPositionBefore( modelItem ) );\n\n\t// 1. Find the previous list item that has the same or smaller indent. Basically we are looking for the first model item\n\t// that is a \"parent\" or \"sibling\" of the injected model item.\n\t// If there is no such list item, it means that the injected list item is the first item in \"its list\".\n\tconst refItem = getSiblingListItem( modelItem.previousSibling, {\n\t\tsameIndent: true,\n\t\tsmallerIndent: true,\n\t\tlistIndent: modelItem.getAttribute( 'listIndent' )\n\t} );\n\tconst prevItem = modelItem.previousSibling;\n\n\tif ( refItem && refItem.getAttribute( 'listIndent' ) == modelItem.getAttribute( 'listIndent' ) ) {\n\t\t// There is a list item with the same indent - we found the same-level sibling.\n\t\t// Break the list after it. The inserted view item will be added in the broken space.\n\t\tconst viewItem = mapper.toViewElement( refItem );\n\t\tinsertPosition = viewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\t} else {\n\t\t// There is no list item with the same indent. Check the previous model item.\n\t\tif ( prevItem && prevItem.name == 'listItem' ) {\n\t\t\t// If it is a list item, it has to have a lower indent.\n\t\t\t// It means that the inserted item should be added to it as its nested item.\n\t\t\tinsertPosition = mapper.toViewPosition( model.createPositionAt( prevItem, 'end' ) );\n\t\t} else {\n\t\t\t// The previous item is not a list item (or does not exist at all).\n\t\t\t// Just map the position and insert the view item at the mapped position.\n\t\t\tinsertPosition = mapper.toViewPosition( model.createPositionBefore( modelItem ) );\n\t\t}\n\t}\n\n\tinsertPosition = positionAfterUiElements( insertPosition );\n\n\t// Insert the view item.\n\tviewWriter.insert( insertPosition, injectedList );\n\n\t// 2. Handle possible children of the injected model item.\n\tif ( prevItem && prevItem.name == 'listItem' ) {\n\t\tconst prevView = mapper.toViewElement( prevItem );\n\n\t\tconst walkerBoundaries = viewWriter.createRange( viewWriter.createPositionAt( prevView, 0 ), insertPosition );\n\t\tconst walker = walkerBoundaries.getWalker( { ignoreElementEnd: true } );\n\n\t\tfor ( const value of walker ) {\n\t\t\tif ( value.item.is( 'li' ) ) {\n\t\t\t\tconst breakPosition = viewWriter.breakContainer( viewWriter.createPositionBefore( value.item ) );\n\t\t\t\tconst viewList = value.item.parent;\n\n\t\t\t\tconst targetPosition = viewWriter.createPositionAt( injectedItem, 'end' );\n\t\t\t\tmergeViewLists( viewWriter, targetPosition.nodeBefore, targetPosition.nodeAfter );\n\t\t\t\tviewWriter.move( viewWriter.createRangeOn( viewList ), targetPosition );\n\n\t\t\t\twalker.position = breakPosition;\n\t\t\t}\n\t\t}\n\t} else {\n\t\tconst nextViewList = injectedList.nextSibling;\n\n\t\tif ( nextViewList && ( nextViewList.is( 'ul' ) || nextViewList.is( 'ol' ) ) ) {\n\t\t\tlet lastSubChild = null;\n\n\t\t\tfor ( const child of nextViewList.getChildren() ) {\n\t\t\t\tconst modelChild = mapper.toModelElement( child );\n\n\t\t\t\tif ( modelChild && modelChild.getAttribute( 'listIndent' ) > modelItem.getAttribute( 'listIndent' ) ) {\n\t\t\t\t\tlastSubChild = child;\n\t\t\t\t} else {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( lastSubChild ) {\n\t\t\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( lastSubChild ) );\n\t\t\t\tviewWriter.move( viewWriter.createRangeOn( lastSubChild.parent ), viewWriter.createPositionAt( injectedItem, 'end' ) );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Merge the inserted view list with its possible neighbor lists.\n\tmergeViewLists( viewWriter, injectedList, injectedList.nextSibling );\n\tmergeViewLists( viewWriter, injectedList.previousSibling, injectedList );\n}\n\n/**\n * Helper function that takes two parameters that are expected to be view list elements, and merges them.\n * The merge happens only if both parameters are list elements of the same type (the same element name and the same class attributes).\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} viewWriter The writer instance.\n * @param {module:engine/view/item~Item} firstList The first element to compare.\n * @param {module:engine/view/item~Item} secondList The second element to compare.\n * @returns {module:engine/view/position~Position|null} The position after merge or `null` when there was no merge.\n */\nexport function mergeViewLists( viewWriter, firstList, secondList ) {\n\t// Check if two lists are going to be merged.\n\tif ( !firstList || !secondList || ( firstList.name != 'ul' && firstList.name != 'ol' ) ) {\n\t\treturn null;\n\t}\n\n\t// Both parameters are list elements, so compare types now.\n\tif ( firstList.name != secondList.name || firstList.getAttribute( 'class' ) !== secondList.getAttribute( 'class' ) ) {\n\t\treturn null;\n\t}\n\n\treturn viewWriter.mergeContainers( viewWriter.createPositionAfter( firstList ) );\n}\n\n/**\n * Helper function that for a given `view.Position`, returns a `view.Position` that is after all `view.UIElement`s that\n * are after the given position.\n *\n * For example:\n * `<container:p>foo^<ui:span></ui:span><ui:span></ui:span>bar</container:p>`\n * For position ^, the position before \"bar\" will be returned.\n *\n * @param {module:engine/view/position~Position} viewPosition\n * @returns {module:engine/view/position~Position}\n */\nexport function positionAfterUiElements( viewPosition ) {\n\treturn viewPosition.getLastMatchingPosition( value => value.item.is( 'uiElement' ) );\n}\n\n/**\n * Helper function that searches for a previous list item sibling of a given model item that meets the given criteria\n * passed by the options object.\n *\n * @param {module:engine/model/item~Item} modelItem\n * @param {Object} options Search criteria.\n * @param {Boolean} [options.sameIndent=false] Whether the sought sibling should have the same indentation.\n * @param {Boolean} [options.smallerIndent=false] Whether the sought sibling should have a smaller indentation.\n * @param {Number} [options.listIndent] The reference indentation.\n * @returns {module:engine/model/item~Item|null}\n */\nexport function getSiblingListItem( modelItem, options ) {\n\tconst sameIndent = !!options.sameIndent;\n\tconst smallerIndent = !!options.smallerIndent;\n\tconst indent = options.listIndent;\n\n\tlet item = modelItem;\n\n\twhile ( item && item.name == 'listItem' ) {\n\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\tif ( ( sameIndent && indent == itemIndent ) || ( smallerIndent && indent > itemIndent ) ) {\n\t\t\treturn item;\n\t\t}\n\n\t\titem = item.previousSibling;\n\t}\n\n\treturn null;\n}\n\n/**\n * Helper method for creating a UI button and linking it with an appropriate command.\n *\n * @private\n * @param {module:core/editor/editor~Editor} editor The editor instance to which the UI component will be added.\n * @param {String} commandName The name of the command.\n * @param {Object} label The button label.\n * @param {String} icon The source of the icon.\n */\nexport function createUIComponent( editor, commandName, label, icon ) {\n\teditor.ui.componentFactory.add( commandName, locale => {\n\t\tconst command = editor.commands.get( commandName );\n\t\tconst buttonView = new ButtonView( locale );\n\n\t\tbuttonView.set( {\n\t\t\tlabel,\n\t\t\ticon,\n\t\t\ttooltip: true,\n\t\t\tisToggleable: true\n\t\t} );\n\n\t\t// Bind button model to command.\n\t\tbuttonView.bind( 'isOn', 'isEnabled' ).to( command, 'value', 'isEnabled' );\n\n\t\t// Execute command.\n\t\tbuttonView.on( 'execute', () => editor.execute( commandName ) );\n\n\t\treturn buttonView;\n\t} );\n}\n\n// Implementation of getFillerOffset for view list item element.\n//\n// @returns {Number|null} Block filler offset or `null` if block filler is not needed.\nfunction getListItemFillerOffset() {\n\tconst hasOnlyLists = !this.isEmpty && ( this.getChild( 0 ).name == 'ul' || this.getChild( 0 ).name == 'ol' );\n\n\tif ( this.isEmpty || hasOnlyLists ) {\n\t\treturn 0;\n\t}\n\n\treturn getFillerOffset.call( this );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/converters\n */\n\nimport {\n\tgenerateLiInUl,\n\tinjectViewList,\n\tmergeViewLists,\n\tgetSiblingListItem,\n\tpositionAfterUiElements\n} from './utils';\nimport TreeWalker from '@ckeditor/ckeditor5-engine/src/model/treewalker';\n\n/**\n * A model-to-view converter for the `listItem` model element insertion.\n *\n * It creates a `<ul><li></li><ul>` (or `<ol>`) view structure out of a `listItem` model element, inserts it at the correct\n * position, and merges the list with surrounding lists (if available).\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewInsertion( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst consumable = conversionApi.consumable;\n\n\t\tif ( !consumable.test( data.item, 'insert' ) ||\n\t\t\t!consumable.test( data.item, 'attribute:listType' ) ||\n\t\t\t!consumable.test( data.item, 'attribute:listIndent' )\n\t\t) {\n\t\t\treturn;\n\t\t}\n\n\t\tconsumable.consume( data.item, 'insert' );\n\t\tconsumable.consume( data.item, 'attribute:listType' );\n\t\tconsumable.consume( data.item, 'attribute:listIndent' );\n\n\t\tconst modelItem = data.item;\n\t\tconst viewItem = generateLiInUl( modelItem, conversionApi );\n\n\t\tinjectViewList( modelItem, viewItem, conversionApi, model );\n\t};\n}\n\n/**\n * A model-to-view converter for the `listItem` model element removal.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewRemove( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tconst viewStart = conversionApi.mapper.toViewPosition( data.position ).getLastMatchingPosition( value => !value.item.is( 'li' ) );\n\t\tconst viewItem = viewStart.nodeAfter;\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// 1. Break the container after and before the list item.\n\t\t// This will create a view list with one view list item - the one to remove.\n\t\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t\t// 2. Remove the list with the item to remove.\n\t\tconst viewList = viewItem.parent;\n\t\tconst viewListPrev = viewList.previousSibling;\n\t\tconst removeRange = viewWriter.createRangeOn( viewList );\n\t\tconst removed = viewWriter.remove( removeRange );\n\n\t\t// 3. Merge the whole created by breaking and removing the list.\n\t\tif ( viewListPrev && viewListPrev.nextSibling ) {\n\t\t\tmergeViewLists( viewWriter, viewListPrev, viewListPrev.nextSibling );\n\t\t}\n\n\t\t// 4. Bring back nested list that was in the removed <li>.\n\t\tconst modelItem = conversionApi.mapper.toModelElement( viewItem );\n\n\t\thoistNestedLists( modelItem.getAttribute( 'listIndent' ) + 1, data.position, removeRange.start, viewItem, conversionApi, model );\n\n\t\t// 5. Unbind removed view item and all children.\n\t\tfor ( const child of viewWriter.createRangeIn( removed ).getItems() ) {\n\t\t\tconversionApi.mapper.unbindViewElement( child );\n\t\t}\n\n\t\tevt.stop();\n\t};\n}\n\n/**\n * A model-to-view converter for the `type` attribute change on the `listItem` model element.\n *\n * This change means that the `<li>` element parent changes from `<ul>` to `<ol>` (or vice versa). This is accomplished\n * by breaking view elements and changing their name. The next {@link module:list/converters~modelViewMergeAfterChangeType}\n * converter will attempt to merge split nodes.\n *\n * Splitting this conversion into 2 steps makes it possible to add an additional conversion in the middle.\n * Check {@link module:list/todolistconverters~modelViewChangeType} to see an example of it.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewChangeType( evt, data, conversionApi ) {\n\tif ( !conversionApi.consumable.consume( data.item, 'attribute:listType' ) ) {\n\t\treturn;\n\t}\n\n\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\tconst viewWriter = conversionApi.writer;\n\n\t// Break the container after and before the list item.\n\t// This will create a view list with one view list item -- the one that changed type.\n\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t// Change name of the view list that holds the changed view item.\n\t// We cannot just change name property, because that would not render properly.\n\tconst viewList = viewItem.parent;\n\tconst listName = data.attributeNewValue == 'numbered' ? 'ol' : 'ul';\n\n\tviewWriter.rename( listName, viewList );\n}\n\n/**\n * A model-to-view converter that attempts to merge nodes split by {@link module:list/converters~modelViewChangeType}.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewMergeAfterChangeType( evt, data, conversionApi ) {\n\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\tconst viewList = viewItem.parent;\n\tconst viewWriter = conversionApi.writer;\n\n\t// Merge the changed view list with other lists, if possible.\n\tmergeViewLists( viewWriter, viewList, viewList.nextSibling );\n\tmergeViewLists( viewWriter, viewList.previousSibling, viewList );\n\n\t// Consumable insertion of children inside the item. They are already handled by re-building the item in view.\n\tfor ( const child of data.item.getChildren() ) {\n\t\tconversionApi.consumable.consume( child, 'insert' );\n\t}\n}\n\n/**\n * A model-to-view converter for the `listIndent` attribute change on the `listItem` model element.\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:attribute\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function modelViewChangeIndent( model ) {\n\treturn ( evt, data, conversionApi ) => {\n\t\tif ( !conversionApi.consumable.consume( data.item, 'attribute:listIndent' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst viewItem = conversionApi.mapper.toViewElement( data.item );\n\t\tconst viewWriter = conversionApi.writer;\n\n\t\t// 1. Break the container after and before the list item.\n\t\t// This will create a view list with one view list item -- the one that changed type.\n\t\tviewWriter.breakContainer( viewWriter.createPositionBefore( viewItem ) );\n\t\tviewWriter.breakContainer( viewWriter.createPositionAfter( viewItem ) );\n\n\t\t// 2. Extract view list with changed view list item and merge \"hole\" possibly created by breaking and removing elements.\n\t\tconst viewList = viewItem.parent;\n\t\tconst viewListPrev = viewList.previousSibling;\n\t\tconst removeRange = viewWriter.createRangeOn( viewList );\n\t\tviewWriter.remove( removeRange );\n\n\t\tif ( viewListPrev && viewListPrev.nextSibling ) {\n\t\t\tmergeViewLists( viewWriter, viewListPrev, viewListPrev.nextSibling );\n\t\t}\n\n\t\t// 3. Bring back nested list that was in the removed <li>.\n\t\thoistNestedLists( data.attributeOldValue + 1, data.range.start, removeRange.start, viewItem, conversionApi, model );\n\n\t\t// 4. Inject view list like it is newly inserted.\n\t\tinjectViewList( data.item, viewItem, conversionApi, model );\n\n\t\t// 5. Consume insertion of children inside the item. They are already handled by re-building the item in view.\n\t\tfor ( const child of data.item.getChildren() ) {\n\t\t\tconversionApi.consumable.consume( child, 'insert' );\n\t\t}\n\t};\n}\n\n/**\n * A special model-to-view converter introduced by the {@link module:list/list~List list feature}. This converter is fired for\n * insert change of every model item, and should be fired before the actual converter. The converter checks whether the inserted\n * model item is a non-`listItem` element. If it is, and it is inserted inside a view list, the converter breaks the\n * list so the model element is inserted to the view parent element corresponding to its model parent element.\n *\n * The converter prevents such situations:\n *\n *\t\t// Model: // View:\n *\t\t<listItem>foo</listItem> <ul>\n *\t\t<listItem>bar</listItem> <li>foo</li>\n *\t\t <li>bar</li>\n *\t\t </ul>\n *\n *\t\t// After change: // Correct view guaranteed by this converter:\n *\t\t<listItem>foo</listItem> <ul><li>foo</li></ul><p>xxx</p><ul><li>bar</li></ul>\n *\t\t<paragraph>xxx</paragraph> // Instead of this wrong view state:\n *\t\t<listItem>bar</listItem> <ul><li>foo</li><p>xxx</p><li>bar</li></ul>\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:insert\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewSplitOnInsert( evt, data, conversionApi ) {\n\tif ( data.item.name != 'listItem' ) {\n\t\tlet viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst lists = [];\n\n\t\t// Break multiple ULs/OLs if there are.\n\t\t//\n\t\t// Imagine following list:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\t// Insert paragraph after item 1.1.1:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t//\n\t\t// Lorem ipsum.\n\t\t//\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\t// In this case 1.1.2 has to become beginning of a new list.\n\t\t// We need to break list before 1.1.2 (obvious), then we need to break list also before 1.2.\n\t\t// Then we need to move those broken pieces one after another and merge:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t//\n\t\t// Lorem ipsum.\n\t\t//\n\t\t// 1.1.2 --------\n\t\t// 1.1.3 --------\n\t\t// 1.1.3.1 --------\n\t\t// 1.2 --------\n\t\t// 1.2.1 --------\n\t\t// 2 --------\n\t\t//\n\t\twhile ( viewPosition.parent.name == 'ul' || viewPosition.parent.name == 'ol' ) {\n\t\t\tviewPosition = viewWriter.breakContainer( viewPosition );\n\n\t\t\tif ( viewPosition.parent.name != 'li' ) {\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\t\t// Remove lists that are after inserted element.\n\t\t\t// They will be brought back later, below the inserted element.\n\t\t\tconst removeStart = viewPosition;\n\t\t\tconst removeEnd = viewWriter.createPositionAt( viewPosition.parent, 'end' );\n\n\t\t\t// Don't remove if there is nothing to remove.\n\t\t\tif ( !removeStart.isEqual( removeEnd ) ) {\n\t\t\t\tconst removed = viewWriter.remove( viewWriter.createRange( removeStart, removeEnd ) );\n\t\t\t\tlists.push( removed );\n\t\t\t}\n\n\t\t\tviewPosition = viewWriter.createPositionAfter( viewPosition.parent );\n\t\t}\n\n\t\t// Bring back removed lists.\n\t\tif ( lists.length > 0 ) {\n\t\t\tfor ( let i = 0; i < lists.length; i++ ) {\n\t\t\t\tconst previousList = viewPosition.nodeBefore;\n\t\t\t\tconst insertedRange = viewWriter.insert( viewPosition, lists[ i ] );\n\t\t\t\tviewPosition = insertedRange.end;\n\n\t\t\t\t// Don't merge first list! We want a split in that place (this is why this converter is introduced).\n\t\t\t\tif ( i > 0 ) {\n\t\t\t\t\tconst mergePos = mergeViewLists( viewWriter, previousList, previousList.nextSibling );\n\n\t\t\t\t\t// If `mergePos` is in `previousList` it means that the lists got merged.\n\t\t\t\t\t// In this case, we need to fix insert position.\n\t\t\t\t\tif ( mergePos && mergePos.parent == previousList ) {\n\t\t\t\t\t\tviewPosition.offset--;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Merge last inserted list with element after it.\n\t\t\tmergeViewLists( viewWriter, viewPosition.nodeBefore, viewPosition.nodeAfter );\n\t\t}\n\t}\n}\n\n/**\n * A special model-to-view converter introduced by the {@link module:list/list~List list feature}. This converter takes care of\n * merging view lists after something is removed or moved from near them.\n *\n * Example:\n *\n *\t\t// Model: // View:\n *\t\t<listItem>foo</listItem> <ul><li>foo</li></ul>\n *\t\t<paragraph>xxx</paragraph> <p>xxx</p>\n *\t\t<listItem>bar</listItem> <ul><li>bar</li></ul>\n *\n *\t\t// After change: // Correct view guaranteed by this converter:\n *\t\t<listItem>foo</listItem> <ul>\n *\t\t<listItem>bar</listItem> <li>foo</li>\n *\t\t <li>bar</li>\n *\t\t </ul>\n *\n * @see module:engine/conversion/downcastdispatcher~DowncastDispatcher#event:remove\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data Additional information about the change.\n * @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi Conversion interface.\n */\nexport function modelViewMergeAfter( evt, data, conversionApi ) {\n\tconst viewPosition = conversionApi.mapper.toViewPosition( data.position );\n\tconst viewItemPrev = viewPosition.nodeBefore;\n\tconst viewItemNext = viewPosition.nodeAfter;\n\n\t// Merge lists if something (remove, move) was done from inside of list.\n\t// Merging will be done only if both items are view lists of the same type.\n\t// The check is done inside the helper function.\n\tmergeViewLists( conversionApi.writer, viewItemPrev, viewItemNext );\n}\n\n/**\n * A view-to-model converter that converts the `<li>` view elements into the `listItem` model elements.\n *\n * To set correct values of the `listType` and `listIndent` attributes the converter:\n * * checks `<li>`'s parent,\n * * stores and increases the `conversionApi.store.indent` value when `<li>`'s sub-items are converted.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function viewModelConverter( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.consume( data.viewItem, { name: true } ) ) {\n\t\tconst writer = conversionApi.writer;\n\n\t\t// 1. Create `listItem` model element.\n\t\tconst listItem = writer.createElement( 'listItem' );\n\n\t\t// 2. Handle `listItem` model element attributes.\n\t\tconst indent = getIndent( data.viewItem );\n\n\t\twriter.setAttribute( 'listIndent', indent, listItem );\n\n\t\t// Set 'bulleted' as default. If this item is pasted into a context,\n\t\tconst type = data.viewItem.parent && data.viewItem.parent.name == 'ol' ? 'numbered' : 'bulleted';\n\t\twriter.setAttribute( 'listType', type, listItem );\n\n\t\t// Try to find allowed parent for list item.\n\t\tconst splitResult = conversionApi.splitToAllowedParent( listItem, data.modelCursor );\n\n\t\t// When there is no allowed parent it means that list item cannot be converted at current model position\n\t\t// and in any of position ancestors.\n\t\tif ( !splitResult ) {\n\t\t\treturn;\n\t\t}\n\n\t\twriter.insert( listItem, splitResult.position );\n\n\t\tconst nextPosition = viewToModelListItemChildrenConverter( listItem, data.viewItem.getChildren(), conversionApi );\n\n\t\t// Result range starts before the first item and ends after the last.\n\t\tdata.modelRange = writer.createRange( data.modelCursor, nextPosition );\n\n\t\t// When `data.modelCursor` parent had to be split to insert list item...\n\t\tif ( splitResult.cursorParent ) {\n\t\t\t// Continue conversion in the split element.\n\t\t\tdata.modelCursor = writer.createPositionAt( splitResult.cursorParent, 0 );\n\t\t} else {\n\t\t\t// Otherwise continue conversion after the last list item.\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t}\n\t}\n}\n\n/**\n * A view-to-model converter for the `<ul>` and `<ol>` view elements that cleans the input view of garbage.\n * This is mostly to clean whitespaces from between the `<li>` view elements inside the view list element, however, also\n * incorrect data can be cleared if the view was incorrect.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function cleanList( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.test( data.viewItem, { name: true } ) ) {\n\t\t// Caching children because when we start removing them iterating fails.\n\t\tconst children = Array.from( data.viewItem.getChildren() );\n\n\t\tfor ( const child of children ) {\n\t\t\tconst isWrongElement = !( child.is( 'li' ) || isList( child ) );\n\n\t\t\tif ( isWrongElement ) {\n\t\t\t\tchild._remove();\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * A view-to-model converter for the `<li>` elements that cleans whitespace formatting from the input view.\n *\n * @see module:engine/conversion/upcastdispatcher~UpcastDispatcher#event:element\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Object} data An object containing conversion input and a placeholder for conversion output and possibly other values.\n * @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n */\nexport function cleanListItem( evt, data, conversionApi ) {\n\tif ( conversionApi.consumable.test( data.viewItem, { name: true } ) ) {\n\t\tif ( data.viewItem.childCount === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst children = [ ...data.viewItem.getChildren() ];\n\n\t\tlet foundList = false;\n\t\tlet firstNode = true;\n\n\t\tfor ( const child of children ) {\n\t\t\tif ( foundList && !isList( child ) ) {\n\t\t\t\tchild._remove();\n\t\t\t}\n\n\t\t\tif ( child.is( 'text' ) ) {\n\t\t\t\t// If this is the first node and it's a text node, left-trim it.\n\t\t\t\tif ( firstNode ) {\n\t\t\t\t\tchild._data = child.data.replace( /^\\s+/, '' );\n\t\t\t\t}\n\n\t\t\t\t// If this is the last text node before <ul> or <ol>, right-trim it.\n\t\t\t\tif ( !child.nextSibling || isList( child.nextSibling ) ) {\n\t\t\t\t\tchild._data = child.data.replace( /\\s+$/, '' );\n\t\t\t\t}\n\t\t\t} else if ( isList( child ) ) {\n\t\t\t\t// If this is a <ul> or <ol>, do not process it, just mark that we already visited list element.\n\t\t\t\tfoundList = true;\n\t\t\t}\n\n\t\t\tfirstNode = false;\n\t\t}\n\t}\n}\n\n/**\n * Returns a callback for model position to view position mapping for {@link module:engine/conversion/mapper~Mapper}. The callback fixes\n * positions between the `listItem` elements that would be incorrectly mapped because of how list items are represented in the model\n * and in the view.\n *\n * @see module:engine/conversion/mapper~Mapper#event:modelToViewPosition\n * @param {module:engine/view/view~View} view A view instance.\n * @returns {Function}\n */\nexport function modelToViewPosition( view ) {\n\treturn ( evt, data ) => {\n\t\tif ( data.isPhantom ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst modelItem = data.modelPosition.nodeBefore;\n\n\t\tif ( modelItem && modelItem.is( 'listItem' ) ) {\n\t\t\tconst viewItem = data.mapper.toViewElement( modelItem );\n\t\t\tconst topmostViewList = viewItem.getAncestors().find( isList );\n\t\t\tconst walker = view.createPositionAt( viewItem, 0 ).getWalker();\n\n\t\t\tfor ( const value of walker ) {\n\t\t\t\tif ( value.type == 'elementStart' && value.item.is( 'li' ) ) {\n\t\t\t\t\tdata.viewPosition = value.previousPosition;\n\n\t\t\t\t\tbreak;\n\t\t\t\t} else if ( value.type == 'elementEnd' && value.item == topmostViewList ) {\n\t\t\t\t\tdata.viewPosition = value.nextPosition;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n/**\n * The callback for view position to model position mapping for {@link module:engine/conversion/mapper~Mapper}. The callback fixes\n * positions between the `<li>` elements that would be incorrectly mapped because of how list items are represented in the model\n * and in the view.\n *\n * @see module:engine/conversion/mapper~Mapper#event:viewToModelPosition\n * @param {module:engine/model/model~Model} model Model instance.\n * @returns {Function} Returns a conversion callback.\n */\nexport function viewToModelPosition( model ) {\n\treturn ( evt, data ) => {\n\t\tconst viewPos = data.viewPosition;\n\t\tconst viewParent = viewPos.parent;\n\t\tconst mapper = data.mapper;\n\n\t\tif ( viewParent.name == 'ul' || viewParent.name == 'ol' ) {\n\t\t\t// Position is directly in <ul> or <ol>.\n\t\t\tif ( !viewPos.isAtEnd ) {\n\t\t\t\t// If position is not at the end, it must be before <li>.\n\t\t\t\t// Get that <li>, map it to `listItem` and set model position before that `listItem`.\n\t\t\t\tconst modelNode = mapper.toModelElement( viewPos.nodeAfter );\n\n\t\t\t\tdata.modelPosition = model.createPositionBefore( modelNode );\n\t\t\t} else {\n\t\t\t\t// Position is at the end of <ul> or <ol>, so there is no <li> after it to be mapped.\n\t\t\t\t// There is <li> before the position, but we cannot just map it to `listItem` and set model position after it,\n\t\t\t\t// because that <li> may contain nested items.\n\t\t\t\t// We will check \"model length\" of that <li>, in other words - how many `listItem`s are in that <li>.\n\t\t\t\tconst modelNode = mapper.toModelElement( viewPos.nodeBefore );\n\t\t\t\tconst modelLength = mapper.getModelLength( viewPos.nodeBefore );\n\n\t\t\t\t// Then we get model position before mapped `listItem` and shift it accordingly.\n\t\t\t\tdata.modelPosition = model.createPositionBefore( modelNode ).getShiftedBy( modelLength );\n\t\t\t}\n\n\t\t\tevt.stop();\n\t\t} else if (\n\t\t\tviewParent.name == 'li' &&\n\t\t\tviewPos.nodeBefore &&\n\t\t\t( viewPos.nodeBefore.name == 'ul' || viewPos.nodeBefore.name == 'ol' )\n\t\t) {\n\t\t\t// In most cases when view position is in <li> it is in text and this is a correct position.\n\t\t\t// However, if position is after <ul> or <ol> we have to fix it -- because in model <ul>/<ol> are not in the `listItem`.\n\t\t\tconst modelNode = mapper.toModelElement( viewParent );\n\n\t\t\t// Check all <ul>s and <ol>s that are in the <li> but before mapped position.\n\t\t\t// Get model length of those elements and then add it to the offset of `listItem` mapped to the original <li>.\n\t\t\tlet modelLength = 1; // Starts from 1 because the original <li> has to be counted in too.\n\t\t\tlet viewList = viewPos.nodeBefore;\n\n\t\t\twhile ( viewList && isList( viewList ) ) {\n\t\t\t\tmodelLength += mapper.getModelLength( viewList );\n\n\t\t\t\tviewList = viewList.previousSibling;\n\t\t\t}\n\n\t\t\tdata.modelPosition = model.createPositionBefore( modelNode ).getShiftedBy( modelLength );\n\n\t\t\tevt.stop();\n\t\t}\n\t};\n}\n\n/**\n * Post-fixer that reacts to changes on document and fixes incorrect model states.\n *\n * In the example below, there is a correct list structure.\n * Then the middle element is removed so the list structure will become incorrect:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>Item 2</listItem> <--- this is removed.\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Item 3</listItem>\n *\n * The list structure after the middle element is removed:\n *\n * \t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Item 3</listItem>\n *\n * Should become:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>Item 1</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>Item 3</listItem> <--- note that indent got post-fixed.\n *\n * @param {module:engine/model/model~Model} model The data model.\n * @param {module:engine/model/writer~Writer} writer The writer to do changes with.\n * @returns {Boolean} `true` if any change has been applied, `false` otherwise.\n */\nexport function modelChangePostFixer( model, writer ) {\n\tconst changes = model.document.differ.getChanges();\n\tconst itemToListHead = new Map();\n\n\tlet applied = false;\n\n\tfor ( const entry of changes ) {\n\t\tif ( entry.type == 'insert' && entry.name == 'listItem' ) {\n\t\t\t_addListToFix( entry.position );\n\t\t} else if ( entry.type == 'insert' && entry.name != 'listItem' ) {\n\t\t\tif ( entry.name != '$text' ) {\n\t\t\t\t// In case of renamed element.\n\t\t\t\tconst item = entry.position.nodeAfter;\n\n\t\t\t\tif ( item.hasAttribute( 'listIndent' ) ) {\n\t\t\t\t\twriter.removeAttribute( 'listIndent', item );\n\n\t\t\t\t\tapplied = true;\n\t\t\t\t}\n\n\t\t\t\tif ( item.hasAttribute( 'listType' ) ) {\n\t\t\t\t\twriter.removeAttribute( 'listType', item );\n\n\t\t\t\t\tapplied = true;\n\t\t\t\t}\n\n\t\t\t\tfor ( const innerItem of Array.from( model.createRangeIn( item ) ).filter( e => e.item.is( 'listItem' ) ) ) {\n\t\t\t\t\t_addListToFix( innerItem.previousPosition );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tconst posAfter = entry.position.getShiftedBy( entry.length );\n\n\t\t\t_addListToFix( posAfter );\n\t\t} else if ( entry.type == 'remove' && entry.name == 'listItem' ) {\n\t\t\t_addListToFix( entry.position );\n\t\t} else if ( entry.type == 'attribute' && entry.attributeKey == 'listIndent' ) {\n\t\t\t_addListToFix( entry.range.start );\n\t\t} else if ( entry.type == 'attribute' && entry.attributeKey == 'listType' ) {\n\t\t\t_addListToFix( entry.range.start );\n\t\t}\n\t}\n\n\tfor ( const listHead of itemToListHead.values() ) {\n\t\t_fixListIndents( listHead );\n\t\t_fixListTypes( listHead );\n\t}\n\n\treturn applied;\n\n\tfunction _addListToFix( position ) {\n\t\tconst prev = position.nodeBefore;\n\n\t\tif ( !prev || !prev.is( 'listItem' ) ) {\n\t\t\tconst item = position.nodeAfter;\n\n\t\t\tif ( item && item.is( 'listItem' ) ) {\n\t\t\t\titemToListHead.set( item, item );\n\t\t\t}\n\t\t} else {\n\t\t\tlet listHead = prev;\n\n\t\t\tif ( itemToListHead.has( listHead ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\twhile ( listHead.previousSibling && listHead.previousSibling.is( 'listItem' ) ) {\n\t\t\t\tlistHead = listHead.previousSibling;\n\n\t\t\t\tif ( itemToListHead.has( listHead ) ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\titemToListHead.set( position.nodeBefore, listHead );\n\t\t}\n\t}\n\n\tfunction _fixListIndents( item ) {\n\t\tlet maxIndent = 0;\n\t\tlet fixBy = null;\n\n\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\t\tif ( itemIndent > maxIndent ) {\n\t\t\t\tlet newIndent;\n\n\t\t\t\tif ( fixBy === null ) {\n\t\t\t\t\tfixBy = itemIndent - maxIndent;\n\t\t\t\t\tnewIndent = maxIndent;\n\t\t\t\t} else {\n\t\t\t\t\tif ( fixBy > itemIndent ) {\n\t\t\t\t\t\tfixBy = itemIndent;\n\t\t\t\t\t}\n\n\t\t\t\t\tnewIndent = itemIndent - fixBy;\n\t\t\t\t}\n\n\t\t\t\twriter.setAttribute( 'listIndent', newIndent, item );\n\n\t\t\t\tapplied = true;\n\t\t\t} else {\n\t\t\t\tfixBy = null;\n\t\t\t\tmaxIndent = item.getAttribute( 'listIndent' ) + 1;\n\t\t\t}\n\n\t\t\titem = item.nextSibling;\n\t\t}\n\t}\n\n\tfunction _fixListTypes( item ) {\n\t\tlet typesStack = [];\n\t\tlet prev = null;\n\n\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\tconst itemIndent = item.getAttribute( 'listIndent' );\n\n\t\t\tif ( prev && prev.getAttribute( 'listIndent' ) > itemIndent ) {\n\t\t\t\ttypesStack = typesStack.slice( 0, itemIndent + 1 );\n\t\t\t}\n\n\t\t\tif ( itemIndent != 0 ) {\n\t\t\t\tif ( typesStack[ itemIndent ] ) {\n\t\t\t\t\tconst type = typesStack[ itemIndent ];\n\n\t\t\t\t\tif ( item.getAttribute( 'listType' ) != type ) {\n\t\t\t\t\t\twriter.setAttribute( 'listType', type, item );\n\n\t\t\t\t\t\tapplied = true;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\ttypesStack[ itemIndent ] = item.getAttribute( 'listType' );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tprev = item;\n\t\t\titem = item.nextSibling;\n\t\t}\n\t}\n}\n\n/**\n * A fixer for pasted content that includes list items.\n *\n * It fixes indentation of pasted list items so the pasted items match correctly to the context they are pasted into.\n *\n * Example:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>A</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>B^</listItem>\n *\t\t// At ^ paste: <listItem listType=\"bulleted\" listIndent=4>X</listItem>\n *\t\t// <listItem listType=\"bulleted\" listIndent=5>Y</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>C</listItem>\n *\n * Should become:\n *\n *\t\t<listItem listType=\"bulleted\" listIndent=0>A</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=1>BX</listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>Y/listItem>\n *\t\t<listItem listType=\"bulleted\" listIndent=2>C</listItem>\n *\n * @param {module:utils/eventinfo~EventInfo} evt An object containing information about the fired event.\n * @param {Array} args Arguments of {@link module:engine/model/model~Model#insertContent}.\n */\nexport function modelIndentPasteFixer( evt, [ content, selectable ] ) {\n\t// Check whether inserted content starts from a `listItem`. If it does not, it means that there are some other\n\t// elements before it and there is no need to fix indents, because even if we insert that content into a list,\n\t// that list will be broken.\n\t// Note: we also need to handle singular elements because inserting item with indent 0 into 0,1,[],2\n\t// would create incorrect model.\n\tlet item = content.is( 'documentFragment' ) ? content.getChild( 0 ) : content;\n\n\tlet selection;\n\n\tif ( !selectable ) {\n\t\tselection = this.document.selection;\n\t} else {\n\t\tselection = this.createSelection( selectable );\n\t}\n\n\tif ( item && item.is( 'listItem' ) ) {\n\t\t// Get a reference list item. Inserted list items will be fixed according to that item.\n\t\tconst pos = selection.getFirstPosition();\n\t\tlet refItem = null;\n\n\t\tif ( pos.parent.is( 'listItem' ) ) {\n\t\t\trefItem = pos.parent;\n\t\t} else if ( pos.nodeBefore && pos.nodeBefore.is( 'listItem' ) ) {\n\t\t\trefItem = pos.nodeBefore;\n\t\t}\n\n\t\t// If there is `refItem` it means that we do insert list items into an existing list.\n\t\tif ( refItem ) {\n\t\t\t// First list item in `data` has indent equal to 0 (it is a first list item). It should have indent equal\n\t\t\t// to the indent of reference item. We have to fix the first item and all of it's children and following siblings.\n\t\t\t// Indent of all those items has to be adjusted to reference item.\n\t\t\tconst indentChange = refItem.getAttribute( 'listIndent' );\n\n\t\t\t// Fix only if there is anything to fix.\n\t\t\tif ( indentChange > 0 ) {\n\t\t\t\t// Adjust indent of all \"first\" list items in inserted data.\n\t\t\t\twhile ( item && item.is( 'listItem' ) ) {\n\t\t\t\t\titem._setAttribute( 'listIndent', item.getAttribute( 'listIndent' ) + indentChange );\n\n\t\t\t\t\titem = item.nextSibling;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Helper function that converts children of a given `<li>` view element into corresponding model elements.\n// The function maintains proper order of elements if model `listItem` is split during the conversion\n// due to block children conversion.\n//\n// @param {module:engine/model/element~Element} listItemModel List item model element to which converted children will be inserted.\n// @param {Iterable.<module:engine/view/node~Node>} viewChildren View elements which will be converted.\n// @param {module:engine/conversion/upcastdispatcher~UpcastConversionApi} conversionApi Conversion interface to be used by the callback.\n// @returns {module:engine/model/position~Position} Position on which next elements should be inserted after children conversion.\nfunction viewToModelListItemChildrenConverter( listItemModel, viewChildren, conversionApi ) {\n\tconst { writer, schema } = conversionApi;\n\n\t// A position after the last inserted `listItem`.\n\tlet nextPosition = writer.createPositionAfter( listItemModel );\n\n\t// Check all children of the converted `<li>`. At this point we assume there are no \"whitespace\" view text nodes\n\t// in view list, between view list items. This should be handled by `<ul>` and `<ol>` converters.\n\tfor ( const child of viewChildren ) {\n\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t\t\t// If the children is a list, we will insert its conversion result after currently handled `listItem`.\n\t\t\t// Then, next insertion position will be set after all the new list items (and maybe other elements if\n\t\t\t// something split list item).\n\t\t\t//\n\t\t\t// If this is a list, we expect that some `listItem`s and possibly other blocks will be inserted, however `.modelCursor`\n\t\t\t// should be set after last `listItem` (or block). This is why it feels safe to use it as `nextPosition`\n\t\t\tnextPosition = conversionApi.convertItem( child, nextPosition ).modelCursor;\n\t\t} else {\n\t\t\t// If this is not a list, try inserting content at the end of the currently handled `listItem`.\n\t\t\tconst result = conversionApi.convertItem( child, writer.createPositionAt( listItemModel, 'end' ) );\n\n\t\t\t// It may end up that the current `listItem` becomes split (if that content cannot be inside `listItem`). For example:\n\t\t\t//\n\t\t\t// <li><p>Foo</p></li>\n\t\t\t//\n\t\t\t// will be converted to:\n\t\t\t//\n\t\t\t// <listItem></listItem><paragraph>Foo</paragraph><listItem></listItem>\n\t\t\t//\n\t\t\tconst convertedChild = result.modelRange.start.nodeAfter;\n\t\t\tconst wasSplit = convertedChild && convertedChild.is( 'element' ) && !schema.checkChild( listItemModel, convertedChild.name );\n\n\t\t\tif ( wasSplit ) {\n\t\t\t\t// As `lastListItem` got split, we need to update it to the second part of the split `listItem` element.\n\t\t\t\t//\n\t\t\t\t// `modelCursor` should be set to a position where the conversion should continue. There are multiple possible scenarios\n\t\t\t\t// that may happen. Usually, `modelCursor` (marked as `#` below) would point to the second list item after conversion:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><p>Foo</p></li>` -> `<listItem></listItem><paragraph>Foo</paragraph><listItem>#</listItem>`\n\t\t\t\t//\n\t\t\t\t// However, in some cases, like auto-paragraphing, the position is placed at the end of the block element:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><div>Foo</div></li>` -> `<listItem></listItem><paragraph>Foo#</paragraph><listItem></listItem>`\n\t\t\t\t//\n\t\t\t\t// or after an element if another element broken auto-paragraphed element:\n\t\t\t\t//\n\t\t\t\t//\t\t`<li><div><h2>Foo</h2></div></li>` -> `<listItem></listItem><heading1>Foo</heading1>#<listItem></listItem>`\n\t\t\t\t//\n\t\t\t\t// We need to check for such cases and use proper list item and position based on it.\n\t\t\t\t//\n\t\t\t\tif ( result.modelCursor.parent.is( 'listItem' ) ) {\n\t\t\t\t\t// (1).\n\t\t\t\t\tlistItemModel = result.modelCursor.parent;\n\t\t\t\t} else {\n\t\t\t\t\t// (2), (3).\n\t\t\t\t\tlistItemModel = findNextListItem( result.modelCursor );\n\t\t\t\t}\n\n\t\t\t\tnextPosition = writer.createPositionAfter( listItemModel );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn nextPosition;\n}\n\n// Helper function that seeks for a next list item starting from given `startPosition`.\nfunction findNextListItem( startPosition ) {\n\tconst treeWalker = new TreeWalker( { startPosition } );\n\n\tlet value;\n\n\tdo {\n\t\tvalue = treeWalker.next();\n\t} while ( !value.value.item.is( 'listItem' ) );\n\n\treturn value.value.item;\n}\n\n// Helper function that takes all children of given `viewRemovedItem` and moves them in a correct place, according\n// to other given parameters.\nfunction hoistNestedLists( nextIndent, modelRemoveStartPosition, viewRemoveStartPosition, viewRemovedItem, conversionApi, model ) {\n\t// Find correct previous model list item element.\n\t// The element has to have either same or smaller indent than given reference indent.\n\t// This will be the model element which will get nested items (if it has smaller indent) or sibling items (if it has same indent).\n\t// Keep in mind that such element might not be found, if removed item was the first item.\n\tconst prevModelItem = getSiblingListItem( modelRemoveStartPosition.nodeBefore, {\n\t\tsameIndent: true,\n\t\tsmallerIndent: true,\n\t\tlistIndent: nextIndent,\n\t\tfoo: 'b'\n\t} );\n\n\tconst mapper = conversionApi.mapper;\n\tconst viewWriter = conversionApi.writer;\n\n\t// Indent of found element or `null` if the element has not been found.\n\tconst prevIndent = prevModelItem ? prevModelItem.getAttribute( 'listIndent' ) : null;\n\n\tlet insertPosition;\n\n\tif ( !prevModelItem ) {\n\t\t// If element has not been found, simply insert lists at the position where the removed item was:\n\t\t//\n\t\t// Lorem ipsum.\n\t\t// 1 -------- <--- this is removed, no previous list item, put nested items in place of removed item.\n\t\t// 1.1 -------- <--- this is reference indent.\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// Lorem ipsum.\n\t\t// 1.1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\tinsertPosition = viewRemoveStartPosition;\n\t} else if ( prevIndent == nextIndent ) {\n\t\t// If element has been found and has same indent as reference indent it means that nested items should\n\t\t// become siblings of found element:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.2 -------- <--- this is `prevModelItem`.\n\t\t// 2 -------- <--- this is removed, previous list item has indent same as reference indent.\n\t\t// 2.1 -------- <--- this is reference indent, this and 2.2 should become siblings of 1.2.\n\t\t// 2.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1 --------\n\t\t// 1.2 --------\n\t\t// 2.1 --------\n\t\t// 2.2 --------\n\t\tconst prevViewList = mapper.toViewElement( prevModelItem ).parent;\n\t\tinsertPosition = viewWriter.createPositionAfter( prevViewList );\n\t} else {\n\t\t// If element has been found and has smaller indent as reference indent it means that nested items\n\t\t// should become nested items of found item:\n\t\t//\n\t\t// 1 -------- <--- this is `prevModelItem`.\n\t\t// 1.1 -------- <--- this is removed, previous list item has indent smaller than reference indent.\n\t\t// 1.1.1 -------- <--- this is reference indent, this and 1.1.1 should become nested items of 1.\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Becomes:\n\t\t//\n\t\t// 1 --------\n\t\t// 1.1.1 --------\n\t\t// 1.1.2 --------\n\t\t// 1.2 --------\n\t\t//\n\t\t// Note: in this case 1.1.1 have indent 2 while 1 have indent 0. In model that should not be possible,\n\t\t// because following item may have indent bigger only by one. But this is fixed by postfixer.\n\t\tconst modelPosition = model.createPositionAt( prevModelItem, 'end' );\n\t\tinsertPosition = mapper.toViewPosition( modelPosition );\n\t}\n\n\tinsertPosition = positionAfterUiElements( insertPosition );\n\n\t// Handle multiple lists. This happens if list item has nested numbered and bulleted lists. Following lists\n\t// are inserted after the first list (no need to recalculate insertion position for them).\n\tfor ( const child of [ ...viewRemovedItem.getChildren() ] ) {\n\t\tif ( isList( child ) ) {\n\t\t\tinsertPosition = viewWriter.move( viewWriter.createRangeOn( child ), insertPosition ).end;\n\n\t\t\tmergeViewLists( viewWriter, child, child.nextSibling );\n\t\t\tmergeViewLists( viewWriter, child.previousSibling, child );\n\t\t}\n\t}\n}\n\n// Checks if view element is a list type (ul or ol).\n//\n// @param {module:engine/view/element~Element} viewElement\n// @returns {Boolean}\nfunction isList( viewElement ) {\n\treturn viewElement.is( 'ol' ) || viewElement.is( 'ul' );\n}\n\n// Calculates the indent value for a list item. Handles HTML compliant and non-compliant lists.\n//\n// Also, fixes non HTML compliant lists indents:\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\t\t |-> OL |-> OL\n//\t\t |-> OL |\n//\t\t | |-> OL |\n//\t\t | |-> OL |\n//\t\t | |-> LI (parent LIs: 1) |-> LI (indent: 1)\n//\t\t |-> LI (parent LIs: 1) |-> LI (indent: 1)\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> OL |\n//\t\t |-> OL |\n//\t\t |-> OL |\n//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\n//\t\tbefore: fixed list:\n//\t\tOL OL\n//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n//\t\t|-> OL |-> OL\n//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 1)\n//\n// @param {module:engine/view/element~Element} listItem\n// @param {Object} conversionStore\n// @returns {Number}\nfunction getIndent( listItem ) {\n\tlet indent = 0;\n\n\tlet parent = listItem.parent;\n\n\twhile ( parent ) {\n\t\t// Each LI in the tree will result in an increased indent for HTML compliant lists.\n\t\tif ( parent.is( 'li' ) ) {\n\t\t\tindent++;\n\t\t} else {\n\t\t\t// If however the list is nested in other list we should check previous sibling of any of the list elements...\n\t\t\tconst previousSibling = parent.previousSibling;\n\n\t\t\t// ...because the we might need increase its indent:\n\t\t\t//\t\tbefore: fixed list:\n\t\t\t//\t\tOL OL\n\t\t\t//\t\t|-> LI (parent LIs: 0) |-> LI (indent: 0)\n\t\t\t//\t\t|-> OL |-> OL\n\t\t\t//\t\t |-> LI (parent LIs: 0) |-> LI (indent: 1)\n\t\t\tif ( previousSibling && previousSibling.is( 'li' ) ) {\n\t\t\t\tindent++;\n\t\t\t}\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n\n\treturn indent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/listediting\n */\n\nimport ListCommand from './listcommand';\nimport IndentCommand from './indentcommand';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\n\nimport {\n\tcleanList,\n\tcleanListItem,\n\tmodelViewInsertion,\n\tmodelViewChangeType,\n\tmodelViewMergeAfterChangeType,\n\tmodelViewMergeAfter,\n\tmodelViewRemove,\n\tmodelViewSplitOnInsert,\n\tmodelViewChangeIndent,\n\tmodelChangePostFixer,\n\tmodelIndentPasteFixer,\n\tviewModelConverter,\n\tmodelToViewPosition,\n\tviewToModelPosition\n} from './converters';\n\n/**\n * The engine of the list feature. It handles creating, editing and removing lists and list items.\n *\n * It registers the `'numberedList'`, `'bulletedList'`, `'indentList'` and `'outdentList'` commands.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ListEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ListEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Paragraph ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\n\t\t// Schema.\n\t\t// Note: in case `$block` will ever be allowed in `listItem`, keep in mind that this feature\n\t\t// uses `Selection#getSelectedBlocks()` without any additional processing to obtain all selected list items.\n\t\t// If there are blocks allowed inside list item, algorithms using `getSelectedBlocks()` will have to be modified.\n\t\teditor.model.schema.register( 'listItem', {\n\t\t\tinheritAllFrom: '$block',\n\t\t\tallowAttributes: [ 'listType', 'listIndent' ]\n\t\t} );\n\n\t\t// Converters.\n\t\tconst data = editor.data;\n\t\tconst editing = editor.editing;\n\n\t\teditor.model.document.registerPostFixer( writer => modelChangePostFixer( editor.model, writer ) );\n\n\t\tediting.mapper.registerViewToModelLength( 'li', getViewListItemLength );\n\t\tdata.mapper.registerViewToModelLength( 'li', getViewListItemLength );\n\n\t\tediting.mapper.on( 'modelToViewPosition', modelToViewPosition( editing.view ) );\n\t\tediting.mapper.on( 'viewToModelPosition', viewToModelPosition( editor.model ) );\n\t\tdata.mapper.on( 'modelToViewPosition', modelToViewPosition( editing.view ) );\n\n\t\teditor.conversion.for( 'editingDowncast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'insert', modelViewSplitOnInsert, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'insert:listItem', modelViewInsertion( editor.model ) );\n\t\t\t\tdispatcher.on( 'attribute:listType:listItem', modelViewChangeType, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'attribute:listType:listItem', modelViewMergeAfterChangeType, { priority: 'low' } );\n\t\t\t\tdispatcher.on( 'attribute:listIndent:listItem', modelViewChangeIndent( editor.model ) );\n\t\t\t\tdispatcher.on( 'remove:listItem', modelViewRemove( editor.model ) );\n\t\t\t\tdispatcher.on( 'remove', modelViewMergeAfter, { priority: 'low' } );\n\t\t\t} );\n\n\t\teditor.conversion.for( 'dataDowncast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'insert', modelViewSplitOnInsert, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'insert:listItem', modelViewInsertion( editor.model ) );\n\t\t\t} );\n\n\t\teditor.conversion.for( 'upcast' )\n\t\t\t.add( dispatcher => {\n\t\t\t\tdispatcher.on( 'element:ul', cleanList, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:ol', cleanList, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:li', cleanListItem, { priority: 'high' } );\n\t\t\t\tdispatcher.on( 'element:li', viewModelConverter );\n\t\t\t} );\n\n\t\t// Fix indentation of pasted items.\n\t\teditor.model.on( 'insertContent', modelIndentPasteFixer, { priority: 'high' } );\n\n\t\t// Register commands for numbered and bulleted list.\n\t\teditor.commands.add( 'numberedList', new ListCommand( editor, 'numbered' ) );\n\t\teditor.commands.add( 'bulletedList', new ListCommand( editor, 'bulleted' ) );\n\n\t\t// Register commands for indenting.\n\t\teditor.commands.add( 'indentList', new IndentCommand( editor, 'forward' ) );\n\t\teditor.commands.add( 'outdentList', new IndentCommand( editor, 'backward' ) );\n\n\t\tconst viewDocument = editing.view.document;\n\n\t\t// Overwrite default Enter key behavior.\n\t\t// If Enter key is pressed with selection collapsed in empty list item, outdent it instead of breaking it.\n\t\tthis.listenTo( viewDocument, 'enter', ( evt, data ) => {\n\t\t\tconst doc = this.editor.model.document;\n\t\t\tconst positionParent = doc.selection.getLastPosition().parent;\n\n\t\t\tif ( doc.selection.isCollapsed && positionParent.name == 'listItem' && positionParent.isEmpty ) {\n\t\t\t\tthis.editor.execute( 'outdentList' );\n\n\t\t\t\tdata.preventDefault();\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t} );\n\n\t\t// Overwrite default Backspace key behavior.\n\t\t// If Backspace key is pressed with selection collapsed on first position in first list item, outdent it. #83\n\t\tthis.listenTo( viewDocument, 'delete', ( evt, data ) => {\n\t\t\t// Check conditions from those that require less computations like those immediately available.\n\t\t\tif ( data.direction !== 'backward' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst selection = this.editor.model.document.selection;\n\n\t\t\tif ( !selection.isCollapsed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\t\tif ( !firstPosition.isAtStart ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst positionParent = firstPosition.parent;\n\n\t\t\tif ( positionParent.name !== 'listItem' ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst previousIsAListItem = positionParent.previousSibling && positionParent.previousSibling.name === 'listItem';\n\n\t\t\tif ( previousIsAListItem ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis.editor.execute( 'outdentList' );\n\n\t\t\tdata.preventDefault();\n\t\t\tevt.stop();\n\t\t}, { priority: 'high' } );\n\n\t\tconst getCommandExecuter = commandName => {\n\t\t\treturn ( data, cancel ) => {\n\t\t\t\tconst command = this.editor.commands.get( commandName );\n\n\t\t\t\tif ( command.isEnabled ) {\n\t\t\t\t\tthis.editor.execute( commandName );\n\t\t\t\t\tcancel();\n\t\t\t\t}\n\t\t\t};\n\t\t};\n\n\t\teditor.keystrokes.set( 'Tab', getCommandExecuter( 'indentList' ) );\n\t\teditor.keystrokes.set( 'Shift+Tab', getCommandExecuter( 'outdentList' ) );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tafterInit() {\n\t\tconst commands = this.editor.commands;\n\n\t\tconst indent = commands.get( 'indent' );\n\t\tconst outdent = commands.get( 'outdent' );\n\n\t\tif ( indent ) {\n\t\t\tindent.registerChildCommand( commands.get( 'indentList' ) );\n\t\t}\n\n\t\tif ( outdent ) {\n\t\t\toutdent.registerChildCommand( commands.get( 'outdentList' ) );\n\t\t}\n\t}\n}\n\nfunction getViewListItemLength( element ) {\n\tlet length = 1;\n\n\tfor ( const child of element.getChildren() ) {\n\t\tif ( child.name == 'ul' || child.name == 'ol' ) {\n\t\t\tfor ( const item of child.getChildren() ) {\n\t\t\t\tlength += getViewListItemLength( item );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn length;\n}\n","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M7 5.75c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM3.5 3v5H2V3.7H1v-1h2.5V3zM.343 17.857l2.59-3.257H2.92a.6.6 0 1 0-1.04 0H.302a2 2 0 1 1 3.995 0h-.001c-.048.405-.16.734-.333.988-.175.254-.59.692-1.244 1.312H4.3v1h-4l.043-.043zM7 14.75a.75.75 0 0 1 .75-.75h9.5a.75.75 0 1 1 0 1.5h-9.5a.75.75 0 0 1-.75-.75z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module list/listui\n */\nimport { createUIComponent } from './utils';\nimport numberedListIcon from '../theme/icons/numberedlist.svg';\nimport bulletedListIcon from '../theme/icons/bulletedlist.svg';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n/**\n * The list UI feature. It introduces the `'numberedList'` and `'bulletedList'` buttons that\n * allow to convert paragraphs to and from list items and indent or outdent them.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ListUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const t = this.editor.t;\n // Create two buttons and link them with numberedList and bulletedList commands.\n createUIComponent(this.editor, 'numberedList', t('ae'), numberedListIcon);\n createUIComponent(this.editor, 'bulletedList', t('af'), bulletedListIcon);\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/converters\n */\n\n/**\n * Returns a function that converts the model \"url\" attribute to the view representation.\n *\n * Depending on the configuration, the view representation can be \"semantic\" (for the data pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"foo\"></oembed>\n *\t\t</figure>\n *\n * or \"non-semantic\" (for the editing view pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"foo\">[ non-semantic media preview for \"foo\" ]</div>\n *\t\t</figure>\n *\n * **Note:** Changing the model \"url\" attribute replaces the entire content of the\n * `<figure>` in the view.\n *\n * @param {module:media-embed/mediaregistry~MediaRegistry} registry The registry providing\n * the media and their content.\n * @param {Object} options\n * @param {String} [options.renderMediaPreview] When `true`, the converter will create the view in the non-semantic form.\n * @param {String} [options.renderForEditingView] When `true`, the converter will create a view specific for the\n * editing pipeline (e.g. including CSS classes, content placeholders).\n * @returns {Function}\n */\nexport function modelToViewUrlAttributeConverter( registry, options ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'attribute:url:media', converter );\n\t};\n\n\tfunction converter( evt, data, conversionApi ) {\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst url = data.attributeNewValue;\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst figure = conversionApi.mapper.toViewElement( data.item );\n\n\t\t// TODO: removing it and creating it from scratch is a hack. We can do better than that.\n\t\tviewWriter.remove( viewWriter.createRangeIn( figure ) );\n\n\t\tconst mediaViewElement = registry.getMediaViewElement( viewWriter, url, options );\n\n\t\tviewWriter.insert( viewWriter.createPositionAt( figure, 0 ), mediaViewElement );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/utils\n */\n\nimport { isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to a media embed widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the media widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label.\n * @returns {module:engine/view/element~Element}\n */\nexport function toMediaWidget( viewElement, writer, label ) {\n\twriter.setCustomProperty( 'media', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { label } );\n}\n\n/**\n * Returns a media widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedMediaViewWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isMediaWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Checks if a given view element is a media widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isMediaWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'media' ) && isWidget( viewElement );\n}\n\n/**\n * Creates a view element representing the media. Either \"semantic\" one for the data pipeline:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"foo\"></oembed>\n *\t\t</figure>\n *\n * or \"non-semantic\" (for the editing view pipeline):\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"foo\">[ non-semantic media preview for \"foo\" ]</div>\n *\t\t</figure>\n *\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer\n * @param {module:media-embed/mediaregistry~MediaRegistry} registry\n * @param {String} url\n * @param {Object} options\n * @param {String} [options.useSemanticWrapper]\n * @param {String} [options.renderForEditingView]\n * @returns {module:engine/view/containerelement~ContainerElement}\n */\nexport function createMediaFigureElement( writer, registry, url, options ) {\n\tconst figure = writer.createContainerElement( 'figure', { class: 'media' } );\n\n\t// TODO: This is a hack. Without it, the figure in the data pipeline will contain   because\n\t// its only child is the UIElement (wrapper).\n\t//\n\t// Note: The hack is a copy&paste from widget utils; it makes the figure act like it's a widget.\n\tfigure.getFillerOffset = getFillerOffset;\n\n\twriter.insert( writer.createPositionAt( figure, 0 ), registry.getMediaViewElement( writer, url, options ) );\n\n\treturn figure;\n}\n\n/**\n * Returns a selected media element in the model, if any.\n *\n * @param {module:engine/model/selection~Selection} selection\n * @returns {module:engine/model/element~Element|null}\n */\nexport function getSelectedMediaModelWidget( selection ) {\n\tconst selectedElement = selection.getSelectedElement();\n\n\tif ( selectedElement && selectedElement.is( 'media' ) ) {\n\t\treturn selectedElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Creates a media element and inserts it into the model.\n *\n * **Note**: This method will use {@link module:engine/model/model~Model#insertContent `model.insertContent()`} logic of inserting content\n * if no `insertPosition` is passed.\n *\n * @param {module:engine/model/model~Model} model\n * @param {String} url An URL of an embeddable media.\n * @param {module:engine/model/position~Position} [insertPosition] Position to insert media. If not specified,\n * the default behavior of {@link module:engine/model/model~Model#insertContent `model.insertContent()`} will\n * be applied.\n */\nexport function insertMedia( model, url, insertPosition ) {\n\tmodel.change( writer => {\n\t\tconst mediaElement = writer.createElement( 'media', { url } );\n\n\t\tmodel.insertContent( mediaElement, insertPosition );\n\n\t\twriter.setSelection( mediaElement, 'on' );\n\t} );\n}\n\nfunction getFillerOffset() {\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaembedcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findOptimalInsertionPosition } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { getSelectedMediaModelWidget, insertMedia } from './utils';\n\n/**\n * The insert media command.\n *\n * The command is registered by the {@link module:media-embed/mediaembedediting~MediaEmbedEditing} as `'mediaEmbed'`.\n *\n * To insert media at the current selection, execute the command and specify the URL:\n *\n *\t\teditor.execute( 'mediaEmbed', 'http://url.to.the/media' );\n *\n * @extends module:core/command~Command\n */\nexport default class MediaEmbedCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst schema = model.schema;\n\t\tconst position = selection.getFirstPosition();\n\t\tconst selectedMedia = getSelectedMediaModelWidget( selection );\n\n\t\tlet parent = position.parent;\n\n\t\tif ( parent != parent.root ) {\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\tthis.value = selectedMedia ? selectedMedia.getAttribute( 'url' ) : null;\n\t\tthis.isEnabled = schema.checkChild( parent, 'media' );\n\t}\n\n\t/**\n\t * Executes the command, which either:\n\t *\n\t * * updates the URL of the selected media,\n\t * * inserts the new media into the editor and puts the selection around it.\n\t *\n\t * @fires execute\n\t * @param {String} url The URL of the media.\n\t */\n\texecute( url ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst selectedMedia = getSelectedMediaModelWidget( selection );\n\n\t\tif ( selectedMedia ) {\n\t\t\tmodel.change( writer => {\n\t\t\t\twriter.setAttribute( 'url', url, selectedMedia );\n\t\t\t} );\n\t\t} else {\n\t\t\tconst insertPosition = findOptimalInsertionPosition( selection, model );\n\n\t\t\tinsertMedia( model, url, insertPosition );\n\t\t}\n\t}\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaregistry\n */\n\n/* globals console */\n\nimport mediaPlaceholderIcon from '../theme/icons/media-placeholder.svg';\nimport TooltipView from '@ckeditor/ckeditor5-ui/src/tooltip/tooltipview';\nimport IconView from '@ckeditor/ckeditor5-ui/src/icon/iconview';\nimport Template from '@ckeditor/ckeditor5-ui/src/template';\nimport { attachLinkToDocumentation } from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nconst mediaPlaceholderIconViewBox = '0 0 64 42';\n\n/**\n * A bridge between the raw media content provider definitions and the editor view content.\n *\n * It helps translating media URLs to corresponding {@link module:engine/view/element~Element view elements}.\n *\n * Mostly used by the {@link module:media-embed/mediaembedediting~MediaEmbedEditing} plugin.\n */\nexport default class MediaRegistry {\n\t/**\n\t * Creates an instance of the {@link module:media-embed/mediaregistry~MediaRegistry} class.\n\t *\n\t * @param {module:utils/locale~Locale} locale The localization services instance.\n\t * @param {module:media-embed/mediaembed~MediaEmbedConfig} config The configuration of the media embed feature.\n\t */\n\tconstructor( locale, config ) {\n\t\tconst providers = config.providers;\n\t\tconst extraProviders = config.extraProviders || [];\n\t\tconst removedProviders = new Set( config.removeProviders );\n\t\tconst providerDefinitions = providers\n\t\t\t.concat( extraProviders )\n\t\t\t.filter( provider => {\n\t\t\t\tconst name = provider.name;\n\n\t\t\t\tif ( !name ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * One of the providers (or extra providers) specified in the media embed configuration\n\t\t\t\t\t * has no name and will not be used by the editor. In order to get this media\n\t\t\t\t\t * provider working, double check your editor configuration.\n\t\t\t\t\t *\n\t\t\t\t\t * @warning media-embed-no-provider-name\n\t\t\t\t\t */\n\t\t\t\t\tconsole.warn( attachLinkToDocumentation(\n\t\t\t\t\t\t'media-embed-no-provider-name: The configured media provider has no name and cannot be used.'\n\t\t\t\t\t), { provider } );\n\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\treturn !removedProviders.has( name );\n\t\t\t} );\n\n\t\t/**\n\t\t * The locale {@link module:utils/locale~Locale} instance.\n\t\t *\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * The media provider definitions available for the registry. Usually corresponding with the\n\t\t * {@link module:media-embed/mediaembed~MediaEmbedConfig media configuration}.\n\t\t *\n\t\t * @member {Array}\n\t\t */\n\t\tthis.providerDefinitions = providerDefinitions;\n\t}\n\n\t/**\n\t * Checks whether the passed URL is representing a certain media type allowed in the editor.\n\t *\n\t * @param {String} url The URL to be checked\n\t * @returns {Boolean}\n\t */\n\thasMedia( url ) {\n\t\treturn !!this._getMedia( url );\n\t}\n\n\t/**\n\t * For the given media URL string and options, it returns the {@link module:engine/view/element~Element view element}\n\t * representing that media.\n\t *\n\t * **Note:** If no URL is specified, an empty view element is returned.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {String} url The URL to be translated into a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderMediaPreview]\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tgetMediaViewElement( writer, url, options ) {\n\t\treturn this._getMedia( url ).getViewElement( writer, options );\n\t}\n\n\t/**\n\t * Returns a `Media` instance for the given URL.\n\t *\n\t * @protected\n\t * @param {String} url The URL of the media.\n\t * @returns {module:media-embed/mediaregistry~Media|null} The `Media` instance or `null` when there is none.\n\t */\n\t_getMedia( url ) {\n\t\tif ( !url ) {\n\t\t\treturn new Media( this.locale );\n\t\t}\n\n\t\turl = url.trim();\n\n\t\tfor ( const definition of this.providerDefinitions ) {\n\t\t\tconst previewRenderer = definition.html;\n\t\t\tlet pattern = definition.url;\n\n\t\t\tif ( !Array.isArray( pattern ) ) {\n\t\t\t\tpattern = [ pattern ];\n\t\t\t}\n\n\t\t\tfor ( const subPattern of pattern ) {\n\t\t\t\tconst match = this._getUrlMatches( url, subPattern );\n\n\t\t\t\tif ( match ) {\n\t\t\t\t\treturn new Media( this.locale, url, match, previewRenderer );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Tries to match `url` to `pattern`.\n\t *\n\t * @private\n\t * @param {String} url The URL of the media.\n\t * @param {RegExp} pattern The pattern that should accept the media URL.\n\t * @returns {Array|null}\n\t */\n\t_getUrlMatches( url, pattern ) {\n\t\t// 1. Try to match without stripping the protocol and \"www\" subdomain.\n\t\tlet match = url.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\t// 2. Try to match after stripping the protocol.\n\t\tlet rawUrl = url.replace( /^https?:\\/\\//, '' );\n\t\tmatch = rawUrl.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\t// 3. Try to match after stripping the \"www\" subdomain.\n\t\trawUrl = rawUrl.replace( /^www\\./, '' );\n\t\tmatch = rawUrl.match( pattern );\n\n\t\tif ( match ) {\n\t\t\treturn match;\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n/**\n * Represents media defined by the provider configuration.\n *\n * It can be rendered to the {@link module:engine/view/element~Element view element} and used in the editing or data pipeline.\n *\n * @private\n */\nclass Media {\n\tconstructor( locale, url, match, previewRenderer ) {\n\t\t/**\n\t\t * The URL this Media instance represents.\n\t\t *\n\t\t * @member {String}\n\t\t */\n\t\tthis.url = this._getValidUrl( url );\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method\n\t\t */\n\t\tthis._t = locale.t;\n\n\t\t/**\n\t\t * The output of the `RegExp.match` which validated the {@link #url} of this media.\n\t\t *\n\t\t * @member {Object}\n\t\t */\n\t\tthis._match = match;\n\n\t\t/**\n\t\t * The function returning the HTML string preview of this media.\n\t\t *\n\t\t * @member {Function}\n\t\t */\n\t\tthis._previewRenderer = previewRenderer;\n\t}\n\n\t/**\n\t * Returns the view element representation of the media.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderMediaPreview]\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {module:engine/view/element~Element}\n\t */\n\tgetViewElement( writer, options ) {\n\t\tconst attributes = {};\n\n\t\tif ( options.renderForEditingView || ( options.renderMediaPreview && this.url && this._previewRenderer ) ) {\n\t\t\tif ( this.url ) {\n\t\t\t\tattributes[ 'data-oembed-url' ] = this.url;\n\t\t\t}\n\n\t\t\tif ( options.renderForEditingView ) {\n\t\t\t\tattributes.class = 'ck-media__wrapper';\n\t\t\t}\n\n\t\t\tconst mediaHtml = this._getPreviewHtml( options );\n\n\t\t\treturn writer.createUIElement( 'div', attributes, function( domDocument ) {\n\t\t\t\tconst domElement = this.toDomElement( domDocument );\n\n\t\t\t\tdomElement.innerHTML = mediaHtml;\n\n\t\t\t\treturn domElement;\n\t\t\t} );\n\t\t} else {\n\t\t\tif ( this.url ) {\n\t\t\t\tattributes.url = this.url;\n\t\t\t}\n\n\t\t\treturn writer.createEmptyElement( 'oembed', attributes );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the HTML string of the media content preview.\n\t *\n\t * @param {module:engine/view/downcastwriter~DowncastWriter} writer The view writer used to produce a view element.\n\t * @param {Object} options\n\t * @param {String} [options.renderForEditingView]\n\t * @returns {String}\n\t */\n\t_getPreviewHtml( options ) {\n\t\tif ( this._previewRenderer ) {\n\t\t\treturn this._previewRenderer( this._match );\n\t\t} else {\n\t\t\t// The placeholder only makes sense for editing view and media which have URLs.\n\t\t\t// Placeholder is never displayed in data and URL-less media have no content.\n\t\t\tif ( this.url && options.renderForEditingView ) {\n\t\t\t\treturn this._getPlaceholderHtml();\n\t\t\t}\n\n\t\t\treturn '';\n\t\t}\n\t}\n\n\t/**\n\t * Returns the placeholder HTML when the media has no content preview.\n\t *\n\t * @returns {String}\n\t */\n\t_getPlaceholderHtml() {\n\t\tconst tooltip = new TooltipView();\n\t\tconst icon = new IconView();\n\n\t\ttooltip.text = this._t( 'Open media in new tab' );\n\t\ticon.content = mediaPlaceholderIcon;\n\t\ticon.viewBox = mediaPlaceholderIconViewBox;\n\n\t\tconst placeholder = new Template( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: 'ck ck-reset_all ck-media__placeholder'\n\t\t\t},\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: 'ck-media__placeholder__icon'\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [ icon ]\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\ttag: 'a',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: 'ck-media__placeholder__url',\n\t\t\t\t\t\ttarget: '_blank',\n\t\t\t\t\t\trel: 'noopener noreferrer',\n\t\t\t\t\t\thref: this.url\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttag: 'span',\n\t\t\t\t\t\t\tattributes: {\n\t\t\t\t\t\t\t\tclass: 'ck-media__placeholder__url__text'\n\t\t\t\t\t\t\t},\n\t\t\t\t\t\t\tchildren: [ this.url ]\n\t\t\t\t\t\t},\n\t\t\t\t\t\ttooltip\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t]\n\t\t} ).render();\n\n\t\treturn placeholder.outerHTML;\n\t}\n\n\t/**\n\t * Returns the full URL to the specified media.\n\t *\n\t * @param {String} url The URL of the media.\n\t * @returns {String|null}\n\t */\n\t_getValidUrl( url ) {\n\t\tif ( !url ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tif ( url.match( /^https?/ ) ) {\n\t\t\treturn url;\n\t\t}\n\n\t\treturn 'https://' + url;\n\t}\n}\n","export default \"<svg viewBox=\\\"0 0 64 42\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M47.426 17V3.713L63.102 0v19.389h-.001l.001.272c0 1.595-2.032 3.43-4.538 4.098-2.506.668-4.538-.083-4.538-1.678 0-1.594 2.032-3.43 4.538-4.098.914-.244 2.032-.565 2.888-.603V4.516L49.076 7.447v9.556A1.014 1.014 0 0 0 49 17h-1.574zM29.5 17h-8.343a7.073 7.073 0 1 0-4.657 4.06v3.781H3.3a2.803 2.803 0 0 1-2.8-2.804V8.63a2.803 2.803 0 0 1 2.8-2.805h4.082L8.58 2.768A1.994 1.994 0 0 1 10.435 1.5h8.985c.773 0 1.477.448 1.805 1.149l1.488 3.177H26.7c1.546 0 2.8 1.256 2.8 2.805V17zm-11.637 0H17.5a1 1 0 0 0-1 1v.05A4.244 4.244 0 1 1 17.863 17zm29.684 2c.97 0 .953-.048.953.889v20.743c0 .953.016.905-.953.905H19.453c-.97 0-.953.048-.953-.905V19.89c0-.937-.016-.889.97-.889h28.077zm-4.701 19.338V22.183H24.154v16.155h18.692zM20.6 21.375v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616v-1.616H20.6zm0 3.231v1.616h1.616V37.53H20.6zm24.233-16.155v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615v-1.616h-1.615zm0 3.231v1.616h1.615V37.53h-1.615zM29.485 25.283a.4.4 0 0 1 .593-.35l9.05 4.977a.4.4 0 0 1 0 .701l-9.05 4.978a.4.4 0 0 1-.593-.35v-9.956z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/mediaembedediting\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { modelToViewUrlAttributeConverter } from './converters';\nimport MediaEmbedCommand from './mediaembedcommand';\nimport MediaRegistry from './mediaregistry';\nimport {\n toMediaWidget,\n createMediaFigureElement\n} from './utils';\nimport '../theme/mediaembedediting.css';\n/**\n * The media embed editing feature.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbedEditing extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'MediaEmbedEditing';\n }\n /**\n\t * @inheritDoc\n\t */\n constructor(editor) {\n super(editor);\n editor.config.define('mediaEmbed', {\n providers: [\n {\n name: 'dailymotion',\n url: /^dailymotion\\.com\\/video\\/(\\w+)/,\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; \">' + `<iframe src=\"https://www.dailymotion.com/embed/video/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" width=\"480\" height=\"270\" allowfullscreen allow=\"autoplay\">' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'spotify',\n url: [\n /^open\\.spotify\\.com\\/(artist\\/\\w+)/,\n /^open\\.spotify\\.com\\/(album\\/\\w+)/,\n /^open\\.spotify\\.com\\/(track\\/\\w+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 126%;\">' + `<iframe src=\"https://open.spotify.com/embed/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" allowtransparency=\"true\" allow=\"encrypted-media\">' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'youtube',\n url: [\n /^(?:m\\.)?youtube\\.com\\/watch\\?v=([\\w-]+)/,\n /^(?:m\\.)?youtube\\.com\\/v\\/([\\w-]+)/,\n /^youtube\\.com\\/embed\\/([\\w-]+)/,\n /^youtu\\.be\\/([\\w-]+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 56.2493%;\">' + `<iframe src=\"https://www.youtube.com/embed/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen>' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'vimeo',\n url: [\n /^vimeo\\.com\\/(\\d+)/,\n /^vimeo\\.com\\/[^/]+\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/album\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/channels\\/[^/]+\\/(\\d+)/,\n /^vimeo\\.com\\/groups\\/[^/]+\\/videos\\/(\\d+)/,\n /^vimeo\\.com\\/ondemand\\/[^/]+\\/(\\d+)/,\n /^player\\.vimeo\\.com\\/video\\/(\\d+)/\n ],\n html: match => {\n const id = match[1];\n return '<div style=\"position: relative; padding-bottom: 100%; height: 0; padding-bottom: 56.2493%;\">' + `<iframe src=\"https://player.vimeo.com/video/${ id }\" ` + 'style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0;\" ' + 'frameborder=\"0\" webkitallowfullscreen mozallowfullscreen allowfullscreen>' + '</iframe>' + '</div>';\n }\n },\n {\n name: 'instagram',\n url: /^instagram\\.com\\/p\\/(\\w+)/\n },\n {\n name: 'twitter',\n url: /^twitter\\.com/\n },\n {\n name: 'googleMaps',\n url: /^google\\.com\\/maps/\n },\n {\n name: 'flickr',\n url: /^flickr\\.com/\n },\n {\n name: 'facebook',\n url: /^facebook\\.com/\n }\n ]\n });\n /**\n\t\t * The media registry managing the media providers in the editor.\n\t\t *\n\t\t * @member {module:media-embed/mediaregistry~MediaRegistry} #registry\n\t\t */\n this.registry = new MediaRegistry(editor.locale, editor.config.get('mediaEmbed'));\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const schema = editor.model.schema;\n const t = editor.t;\n const conversion = editor.conversion;\n const renderMediaPreview = editor.config.get('mediaEmbed.previewsInData');\n const registry = this.registry;\n editor.commands.add('mediaEmbed', new MediaEmbedCommand(editor));\n // Configure the schema.\n schema.register('media', {\n isObject: true,\n isBlock: true,\n allowWhere: '$block',\n allowAttributes: ['url']\n });\n // Model -> Data\n conversion.for('dataDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n return createMediaFigureElement(viewWriter, registry, url, { renderMediaPreview: url && renderMediaPreview });\n }\n });\n // Model -> Data (url -> data-oembed-url)\n conversion.for('dataDowncast').add(modelToViewUrlAttributeConverter(registry, { renderMediaPreview }));\n // Model -> View (element)\n conversion.for('editingDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n const figure = createMediaFigureElement(viewWriter, registry, url, { renderForEditingView: true });\n return toMediaWidget(figure, viewWriter, t('ar'));\n }\n });\n // Model -> View (url -> data-oembed-url)\n conversion.for('editingDowncast').add(modelToViewUrlAttributeConverter(registry, { renderForEditingView: true }));\n // View -> Model (data-oembed-url -> url)\n conversion.for('upcast') // Upcast semantic media.\n.elementToElement({\n view: {\n name: 'oembed',\n attributes: { url: true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n }) // Upcast non-semantic media.\n.elementToElement({\n view: {\n name: 'div',\n attributes: { 'data-oembed-url': true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('data-oembed-url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/automediaembed\n */\n\nimport MediaEmbedEditing from './mediaembedediting';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport LiveRange from '@ckeditor/ckeditor5-engine/src/model/liverange';\nimport LivePosition from '@ckeditor/ckeditor5-engine/src/model/liveposition';\nimport Undo from '@ckeditor/ckeditor5-undo/src/undo';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport { insertMedia } from './utils';\n\nconst URL_REGEXP = /^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w.-]+)+[\\w\\-._~:/?#[\\]@!$&'()*+,;=]+$/;\n\n/**\n * The auto-media embed plugin. It recognizes media links in the pasted content and embeds\n * them shortly after they are injected into the document.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class AutoMediaEmbed extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard, Undo ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'AutoMediaEmbed';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The paste–to–embed `setTimeout` ID. Stored as a property to allow\n\t\t * cleaning of the timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_timeoutId\n\t\t */\n\t\tthis._timeoutId = null;\n\n\t\t/**\n\t\t * The position where the `<media>` element will be inserted after the timeout,\n\t\t * determined each time the new content is pasted into the document.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition} #_positionToInsert\n\t\t */\n\t\tthis._positionToInsert = null;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst modelDocument = editor.model.document;\n\n\t\t// We need to listen on `Clipboard#inputTransformation` because we need to save positions of selection.\n\t\t// After pasting, the content between those positions will be checked for a URL that could be transformed\n\t\t// into media.\n\t\tthis.listenTo( editor.plugins.get( Clipboard ), 'inputTransformation', () => {\n\t\t\tconst firstRange = modelDocument.selection.getFirstRange();\n\n\t\t\tconst leftLivePosition = LivePosition.fromPosition( firstRange.start );\n\t\t\tleftLivePosition.stickiness = 'toPrevious';\n\n\t\t\tconst rightLivePosition = LivePosition.fromPosition( firstRange.end );\n\t\t\trightLivePosition.stickiness = 'toNext';\n\n\t\t\tmodelDocument.once( 'change:data', () => {\n\t\t\t\tthis._embedMediaBetweenPositions( leftLivePosition, rightLivePosition );\n\n\t\t\t\tleftLivePosition.detach();\n\t\t\t\trightLivePosition.detach();\n\t\t\t}, { priority: 'high' } );\n\t\t} );\n\n\t\teditor.commands.get( 'undo' ).on( 'execute', () => {\n\t\t\tif ( this._timeoutId ) {\n\t\t\t\tglobal.window.clearTimeout( this._timeoutId );\n\t\t\t\tthis._positionToInsert.detach();\n\n\t\t\t\tthis._timeoutId = null;\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Analyzes the part of the document between provided positions in search for a URL representing media.\n\t * When the URL is found, it is automatically converted into media.\n\t *\n\t * @protected\n\t * @param {module:engine/model/liveposition~LivePosition} leftPosition Left position of the selection.\n\t * @param {module:engine/model/liveposition~LivePosition} rightPosition Right position of the selection.\n\t */\n\t_embedMediaBetweenPositions( leftPosition, rightPosition ) {\n\t\tconst editor = this.editor;\n\t\tconst mediaRegistry = editor.plugins.get( MediaEmbedEditing ).registry;\n\t\t// TODO: Use marker instead of LiveRange & LivePositions.\n\t\tconst urlRange = new LiveRange( leftPosition, rightPosition );\n\t\tconst walker = urlRange.getWalker( { ignoreElementEnd: true } );\n\n\t\tlet url = '';\n\n\t\tfor ( const node of walker ) {\n\t\t\tif ( node.item.is( 'textProxy' ) ) {\n\t\t\t\turl += node.item.data;\n\t\t\t}\n\t\t}\n\n\t\turl = url.trim();\n\n\t\t// If the URL does not match to universal URL regexp, let's skip that.\n\t\tif ( !url.match( URL_REGEXP ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If the URL represents a media, let's use it.\n\t\tif ( !mediaRegistry.hasMedia( url ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst mediaEmbedCommand = editor.commands.get( 'mediaEmbed' );\n\n\t\t// Do not anything if media element cannot be inserted at the current position (#47).\n\t\tif ( !mediaEmbedCommand.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Position won't be available in the `setTimeout` function so let's clone it.\n\t\tthis._positionToInsert = LivePosition.fromPosition( leftPosition );\n\n\t\t// This action mustn't be executed if undo was called between pasting and auto-embedding.\n\t\tthis._timeoutId = global.window.setTimeout( () => {\n\t\t\teditor.model.change( writer => {\n\t\t\t\tthis._timeoutId = null;\n\n\t\t\t\twriter.remove( urlRange );\n\n\t\t\t\tlet insertionPosition;\n\n\t\t\t\t// Check if position where the media element should be inserted is still valid.\n\t\t\t\t// Otherwise leave it as undefined to use document.selection - default behavior of model.insertContent().\n\t\t\t\tif ( this._positionToInsert.root.rootName !== '$graveyard' ) {\n\t\t\t\t\tinsertionPosition = this._positionToInsert;\n\t\t\t\t}\n\n\t\t\t\tinsertMedia( editor.model, url, insertionPosition );\n\n\t\t\t\tthis._positionToInsert.detach();\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t} );\n\t\t}, 100 );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/ui/mediaformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../theme/mediaform.css';\n/**\n * The media form view controller class.\n *\n * See {@link module:media-embed/ui/mediaformview~MediaFormView}.\n *\n * @extends module:ui/view~View\n */\nexport default class MediaFormView extends View {\n /**\n\t * @param {Array.<Function>} validators Form validators used by {@link #isValid}.\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n constructor(validators, locale) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The URL input view.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t\t */\n this.urlInputView = this._createUrlInput();\n /**\n\t\t * The Save button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.saveButtonView = this._createButton(t('bf'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * The Cancel button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.cancelButtonView = this._createButton(t('bg'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of views that can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n /**\n\t\t * An array of form validators used by {@link #isValid}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Array.<Function>}\n\t\t */\n this._validators = validators;\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: [\n 'ck',\n 'ck-media-form'\n ],\n tabindex: '-1'\n },\n children: [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ]\n }); /**\n\t\t * The default info text for the {@link #urlInputView}.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoDefault\n\t\t */\n /**\n\t\t * The info text with an additional tip for the {@link #urlInputView},\n\t\t * displayed when the input has some value.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoTip\n\t\t */\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n submitHandler({ view: this });\n const childViews = [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n const stopPropagation = data => data.stopPropagation();\n // Since the form is in the dropdown panel which is a child of the toolbar, the toolbar's\n // keystroke handler would take over the key management in the URL input. We need to prevent\n // this ASAP. Otherwise, the basic caret movement using the arrow keys will be impossible.\n this.keystrokes.set('arrowright', stopPropagation);\n this.keystrokes.set('arrowleft', stopPropagation);\n this.keystrokes.set('arrowup', stopPropagation);\n this.keystrokes.set('arrowdown', stopPropagation);\n // Intercept the \"selectstart\" event, which is blocked by default because of the default behavior\n // of the DropdownView#panelView.\n // TODO: blocking \"selectstart\" in the #panelView should be configurable per–drop–down instance.\n this.listenTo(this.urlInputView.element, 'selectstart', (evt, domEvt) => {\n domEvt.stopPropagation();\n }, { priority: 'high' });\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the form.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * The native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @type {Number}\n\t */\n get url() {\n return this.urlInputView.inputView.element.value.trim();\n }\n /**\n\t * Sets the native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @param {String} url\n\t */\n set url(url) {\n this.urlInputView.inputView.element.value = url.trim();\n }\n /**\n\t * Validates the form and returns `false` when some fields are invalid.\n\t *\n\t * @returns {Boolean}\n\t */\n isValid() {\n this.resetFormStatus();\n for (const validator of this._validators) {\n const errorText = validator(this);\n // One error per field is enough.\n if (errorText) {\n // Apply updated error.\n this.urlInputView.errorText = errorText;\n return false;\n }\n }\n return true;\n }\n /**\n\t * Cleans up the supplementary error and information text of the {@link #urlInputView}\n\t * bringing them back to the state when the form has been displayed for the first time.\n\t *\n\t * See {@link #isValid}.\n\t */\n resetFormStatus() {\n this.urlInputView.errorText = null;\n this.urlInputView.infoText = this._urlInputViewInfoDefault;\n }\n /**\n\t * Creates a labeled input view.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView} Labeled input view instance.\n\t */\n _createUrlInput() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n const inputView = labeledInput.inputView;\n this._urlInputViewInfoDefault = t('bh');\n this._urlInputViewInfoTip = t('bi');\n labeledInput.label = t('bj');\n labeledInput.infoText = this._urlInputViewInfoDefault;\n inputView.placeholder = 'https://example.com';\n inputView.on('input', () => {\n // Display the tip text only when there's some value. Otherwise fall back to the default info text.\n labeledInput.infoText = inputView.element.value ? this._urlInputViewInfoTip : this._urlInputViewInfoDefault;\n });\n return labeledInput;\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n} /**\n * Fired when the form view is submitted (when one of the children triggered the submit event),\n * e.g. click on {@link #saveButtonView}.\n *\n * @event submit\n */\n /**\n * Fired when the form view is canceled, e.g. click on {@link #cancelButtonView}.\n *\n * @event cancel\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/mediaembedui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { createDropdown } from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport MediaFormView from './ui/mediaformview';\nimport MediaEmbedEditing from './mediaembedediting';\nimport mediaIcon from '../theme/icons/media.svg';\n/**\n * The media embed UI plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbedUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [MediaEmbedEditing];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'MediaEmbedUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const command = editor.commands.get('mediaEmbed');\n const registry = editor.plugins.get(MediaEmbedEditing).registry;\n /**\n\t\t * The form view displayed inside the drop-down.\n\t\t *\n\t\t * @member {module:media-embed/ui/mediaformview~MediaFormView}\n\t\t */\n this.form = new MediaFormView(getFormValidators(editor.t, registry), editor.locale);\n // Setup `imageUpload` button.\n editor.ui.componentFactory.add('mediaEmbed', locale => {\n const dropdown = createDropdown(locale);\n this._setUpDropdown(dropdown, this.form, command, editor);\n this._setUpForm(this.form, dropdown, command);\n return dropdown;\n });\n }\n _setUpDropdown(dropdown, form, command) {\n const editor = this.editor;\n const t = editor.t;\n const button = dropdown.buttonView;\n dropdown.bind('isEnabled').to(command);\n dropdown.panelView.children.add(form);\n button.set({\n label: t('ao'),\n icon: mediaIcon,\n tooltip: true\n });\n // Note: Use the low priority to make sure the following listener starts working after the\n // default action of the drop-down is executed (i.e. the panel showed up). Otherwise, the\n // invisible form/input cannot be focused/selected.\n button.on('open', () => {\n // Make sure that each time the panel shows up, the URL field remains in sync with the value of\n // the command. If the user typed in the input, then canceled (`urlInputView#value` stays\n // unaltered) and re-opened it without changing the value of the media command (e.g. because they\n // didn't change the selection), they would see the old value instead of the actual value of the\n // command.\n form.url = command.value || '';\n form.urlInputView.select();\n form.focus();\n }, { priority: 'low' });\n dropdown.on('submit', () => {\n if (form.isValid()) {\n editor.execute('mediaEmbed', form.url);\n closeUI();\n }\n });\n dropdown.on('change:isOpen', () => form.resetFormStatus());\n dropdown.on('cancel', () => closeUI());\n function closeUI() {\n editor.editing.view.focus();\n dropdown.isOpen = false;\n }\n }\n _setUpForm(form, dropdown, command) {\n form.delegate('submit', 'cancel').to(dropdown);\n form.urlInputView.bind('value').to(command, 'value');\n // Form elements should be read-only when corresponding commands are disabled.\n form.urlInputView.bind('isReadOnly').to(command, 'isEnabled', value => !value);\n form.saveButtonView.bind('isEnabled').to(command);\n }\n}\nfunction getFormValidators(t, registry) {\n return [\n form => {\n if (!form.url.length) {\n return t('ap');\n }\n },\n form => {\n if (!registry.hasMedia(form.url)) {\n return t('aq');\n }\n }\n ];\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M18.68 2.53c.6 0 .59-.03.59.55v12.84c0 .59.01.56-.59.56H1.29c-.6 0-.59.03-.59-.56V3.08c0-.58-.01-.55.6-.55h17.38zM15.77 14.5v-10H4.2v10h11.57zM2 4v1h1V4H2zm0 2v1h1V6H2zm0 2v1h1V8H2zm0 2v1h1v-1H2zm0 2v1h1v-1H2zm0 2v1h1v-1H2zM17 4v1h1V4h-1zm0 2v1h1V6h-1zm0 2v1h1V8h-1zm0 2v1h1v-1h-1zm0 2v1h1v-1h-1zm0 2v1h1v-1h-1zM7.5 6.677a.4.4 0 0 1 .593-.351l5.133 2.824a.4.4 0 0 1 0 .7l-5.133 2.824a.4.4 0 0 1-.593-.35V6.676z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/list\n */\n\nimport Element from '@ckeditor/ckeditor5-engine/src/view/element';\nimport Matcher from '@ckeditor/ckeditor5-engine/src/view/matcher';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\n/**\n * Transforms Word specific list-like elements to the semantic HTML lists.\n *\n * Lists in Word are represented by block elements with special attributes like:\n *\n *\t\t<p class=MsoListParagraphCxSpFirst style='mso-list:l1 level1 lfo1'>...</p> // Paragraph based list.\n *\t\t<h1 style='mso-list:l0 level1 lfo1'>...</h1> // Heading 1 based list.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment The view structure which to transform.\n * @param {String} stylesString Styles from which list-like elements styling will be extracted.\n */\nexport function transformListItemLikeElementsIntoLists( documentFragment, stylesString ) {\n\tif ( !documentFragment.childCount ) {\n\t\treturn;\n\t}\n\n\tconst writer = new UpcastWriter();\n\tconst itemLikeElements = findAllItemLikeElements( documentFragment, writer );\n\n\tif ( !itemLikeElements.length ) {\n\t\treturn;\n\t}\n\n\tlet currentList = null;\n\n\titemLikeElements.forEach( ( itemLikeElement, i ) => {\n\t\tif ( !currentList || isNewListNeeded( itemLikeElements[ i - 1 ], itemLikeElement ) ) {\n\t\t\tconst listStyle = detectListStyle( itemLikeElement, stylesString );\n\n\t\t\tcurrentList = insertNewEmptyList( listStyle, itemLikeElement.element, writer );\n\t\t}\n\n\t\tconst listItem = transformElementIntoListItem( itemLikeElement.element, writer );\n\n\t\twriter.appendChild( listItem, currentList );\n\t} );\n}\n\n/**\n * Removes paragraph wrapping content inside a list item.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport function unwrapParagraphInListItem( documentFragment, writer ) {\n\tfor ( const value of writer.createRangeIn( documentFragment ) ) {\n\t\tconst element = value.item;\n\n\t\tif ( element.is( 'li' ) ) {\n\t\t\t// Google Docs allows on single paragraph inside LI.\n\t\t\tconst firstChild = element.getChild( 0 );\n\n\t\t\tif ( firstChild.is( 'p' ) ) {\n\t\t\t\twriter.unwrapElement( firstChild );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Finds all list-like elements in a given document fragment.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment\n// in which to look for list-like nodes.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Array.<Object>} Array of found list-like items. Each item is an object containing:\n//\n//\t\t* {module:engine/src/view/element~Element} element List-like element.\n//\t\t* {Number} id List item id parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} order List item creation order parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} indent List item indentation level parsed from `mso-list` style (see `getListItemData()` function).\nfunction findAllItemLikeElements( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\t// Matcher for finding list-like elements.\n\tconst itemLikeElementsMatcher = new Matcher( {\n\t\tname: /^p|h\\d+$/,\n\t\tstyles: {\n\t\t\t'mso-list': /.*/\n\t\t}\n\t} );\n\n\tconst itemLikeElements = [];\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && itemLikeElementsMatcher.match( value.item ) ) {\n\t\t\tconst itemData = getListItemData( value.item );\n\n\t\t\titemLikeElements.push( {\n\t\t\t\telement: value.item,\n\t\t\t\tid: itemData.id,\n\t\t\t\torder: itemData.order,\n\t\t\t\tindent: itemData.indent\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn itemLikeElements;\n}\n\n// Extracts list item style from the provided CSS.\n//\n// List item style is extracted from CSS stylesheet. Each list with its specific style attribute\n// value (`mso-list:l1 level1 lfo1`) has its dedicated properties in a CSS stylesheet defined with a selector like:\n//\n// \t\t@list l1:level1 { ... }\n//\n// It contains `mso-level-number-format` property which defines list numbering/bullet style. If this property\n// is not defined it means default `decimal` numbering.\n//\n// Here CSS string representation is used as `mso-level-number-format` property is an invalid CSS property\n// and will be removed during CSS parsing.\n//\n// @param {Object} listLikeItem List-like item for which list style will be searched for. Usually\n// a result of `findAllItemLikeElements()` function.\n// @param {String} stylesString CSS stylesheet.\n// @returns {Object} result\n// @returns {String} result.type List type, could be `ul` or `ol`.\n// @returns {String} result.style List style, for example: `decimal`, `lower-roman`, etc. It is extracted\n// directly from Word stylesheet without further processing and may be not compatible\n// with CSS `list-style-type` property accepted values.\nfunction detectListStyle( listLikeItem, stylesString ) {\n\tconst listStyleRegexp = new RegExp( `@list l${ listLikeItem.id }:level${ listLikeItem.indent }\\\\s*({[^}]*)`, 'gi' );\n\tconst listStyleTypeRegex = /mso-level-number-format:([^;]*);/gi;\n\n\tconst listStyleMatch = listStyleRegexp.exec( stylesString );\n\n\tlet listStyleType = 'decimal'; // Decimal is default one.\n\tif ( listStyleMatch && listStyleMatch[ 1 ] ) {\n\t\tconst listStyleTypeMatch = listStyleTypeRegex.exec( listStyleMatch[ 1 ] );\n\n\t\tif ( listStyleTypeMatch && listStyleTypeMatch[ 1 ] ) {\n\t\t\tlistStyleType = listStyleTypeMatch[ 1 ].trim();\n\t\t}\n\t}\n\n\treturn {\n\t\ttype: listStyleType !== 'bullet' && listStyleType !== 'image' ? 'ol' : 'ul',\n\t\tstyle: listStyleType\n\t};\n}\n\n// Creates empty list of a given type and inserts it after a specified element.\n//\n// @param {Object} listStyle List style object which determines the type of newly created list.\n// Usually a result of `detectListStyle()` function.\n// @param {module:engine/view/element~Element} element Element before which list is inserted.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} Newly created list element.\nfunction insertNewEmptyList( listStyle, element, writer ) {\n\tconst list = new Element( listStyle.type );\n\tconst position = element.parent.getChildIndex( element );\n\n\twriter.insertChild( position, list, element.parent );\n\n\treturn list;\n}\n\n// Transforms given element into a semantic list item. As the function operates on a provided\n// {module:engine/src/view/element~Element element} it will modify the view structure to which this element belongs.\n//\n// @param {module:engine/view/element~Element} element Element which will be transformed into list item.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} New element to which the given one was transformed. It is\n// inserted in place of the old element (the reference to the old element is lost due to renaming).\nfunction transformElementIntoListItem( element, writer ) {\n\tremoveBulletElement( element, writer );\n\n\treturn writer.rename( 'li', element );\n}\n\n// Extracts list item information from Word specific list-like element style:\n//\n//\t\t`style=\"mso-list:l1 level1 lfo1\"`\n//\n// where:\n//\n//\t\t* `l1` is a list id (however it does not mean this is a continuous list - see #43),\n//\t\t* `level1` is a list item indentation level,\n//\t\t* `lfo1` is a list insertion order in a document.\n//\n// @param {module:engine/view/element~Element} element Element from which style data is extracted.\n// @returns {Object} result\n// @returns {Number} result.id Parent list id.\n// @returns {Number} result.order List item creation order.\n// @returns {Number} result.indent List item indentation level.\nfunction getListItemData( element ) {\n\tconst data = {};\n\tconst listStyle = element.getStyle( 'mso-list' );\n\n\tif ( listStyle ) {\n\t\tconst idMatch = listStyle.match( /(^|\\s+)l(\\d+)/i );\n\t\tconst orderMatch = listStyle.match( /\\s*lfo(\\d+)/i );\n\t\tconst indentMatch = listStyle.match( /\\s*level(\\d+)/i );\n\n\t\tif ( idMatch && orderMatch && indentMatch ) {\n\t\t\tdata.id = idMatch[ 2 ];\n\t\t\tdata.order = orderMatch[ 1 ];\n\t\t\tdata.indent = indentMatch[ 1 ];\n\t\t}\n\t}\n\n\treturn data;\n}\n\n// Removes span with a numbering/bullet from a given element.\n//\n// @param {module:engine/view/element~Element} element\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeBulletElement( element, writer ) {\n\t// Matcher for finding `span` elements holding lists numbering/bullets.\n\tconst bulletMatcher = new Matcher( {\n\t\tname: 'span',\n\t\tstyles: {\n\t\t\t'mso-list': 'Ignore'\n\t\t}\n\t} );\n\n\tconst range = writer.createRangeIn( element );\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && bulletMatcher.match( value.item ) ) {\n\t\t\twriter.remove( value.item );\n\t\t}\n\t}\n}\n\n// Whether previous and current item belongs to the same list. It is determined based on `item.id`\n// (extracted from `mso-list` style, see #getListItemData) and previous sibling of the current item.\n//\n// @param {Object} previousItem\n// @param {Object} currentItem\n// @returns {Boolean}\nfunction isNewListNeeded( previousItem, currentItem ) {\n\tif ( previousItem.id !== currentItem.id ) {\n\t\treturn true;\n\t}\n\n\tconst previousSibling = currentItem.element.previousSibling;\n\n\tif ( !previousSibling ) {\n\t\treturn true;\n\t}\n\n\t// Even with the same id the list does not have to be continuous (#43).\n\treturn !isList( previousSibling );\n}\n\nfunction isList( element ) {\n\treturn element.is( 'ol' ) || element.is( 'ul' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/normalizers/googledocsnormalizer\n */\n\nimport removeBoldWrapper from '../filters/removeboldwrapper';\nimport { unwrapParagraphInListItem } from '../filters/list';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\nconst googleDocsMatch = /id=(\"|')docs-internal-guid-[-0-9a-f]+(\"|')/i;\n\n/**\n * Normalizer for the content pasted from Google Docs.\n *\n * @implements module:paste-from-office/normalizer~Normalizer\n */\nexport default class GoogleDocsNormalizer {\n\t/**\n\t * @inheritDoc\n\t */\n\tisActive( htmlString ) {\n\t\treturn googleDocsMatch.test( htmlString );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute( data ) {\n\t\tconst writer = new UpcastWriter();\n\n\t\tremoveBoldWrapper( data.content, writer );\n\t\tunwrapParagraphInListItem( data.content, writer );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/removeboldwrapper\n */\n\n/**\n * Removes `<b>` tag wrapper added by Google Docs to a copied content.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment element `data.content` obtained from clipboard\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport default function removeBoldWrapper( documentFragment, writer ) {\n\tfor ( const child of documentFragment.getChildren() ) {\n\t\tif ( child.is( 'b' ) && child.getStyle( 'font-weight' ) === 'normal' ) {\n\t\t\tconst childIndex = documentFragment.getChildIndex( child );\n\n\t\t\twriter.remove( child );\n\t\t\twriter.insertChild( childIndex, child.getChildren(), documentFragment );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/space\n */\n\n/**\n * Replaces last space preceding elements closing tag with ` `. Such operation prevents spaces from being removed\n * during further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n * This method also takes into account Word specific `<o:p></o:p>` empty tags.\n * Additionally multiline sequences of spaces and new lines between tags are removed (see #39 and #40).\n *\n * @param {String} htmlString HTML string in which spacing should be normalized.\n * @returns {String} Input HTML with spaces normalized.\n */\nexport function normalizeSpacing( htmlString ) {\n\t// Run normalizeSafariSpaceSpans() two times to cover nested spans.\n\treturn normalizeSafariSpaceSpans( normalizeSafariSpaceSpans( htmlString ) )\n\t\t// Remove all \\r\\n from \"spacerun spans\" so the last replace line doesn't strip all whitespaces.\n\t\t.replace( /(<span\\s+style=['\"]mso-spacerun:yes['\"]>[\\s]*?)[\\r\\n]+(\\s*<\\/span>)/g, '$1$2' )\n\t\t.replace( /<span\\s+style=['\"]mso-spacerun:yes['\"]><\\/span>/g, '' )\n\t\t.replace( / <\\//g, '\\u00A0</' )\n\t\t.replace( / <o:p><\\/o:p>/g, '\\u00A0<o:p></o:p>' )\n\t\t// Remove <o:p> block filler from empty paragraph. Safari uses \\u00A0 instead of  .\n\t\t.replace( /<o:p>( |\\u00A0)<\\/o:p>/g, '' )\n\t\t// Remove all whitespaces when they contain any \\r or \\n.\n\t\t.replace( />(\\s*[\\r\\n]\\s*)</g, '><' );\n}\n\n/**\n * Normalizes spacing in special Word `spacerun spans` (`<span style='mso-spacerun:yes'>\\s+</span>`) by replacing\n * all spaces with `  ` pairs. This prevents spaces from being removed during further DOM/View processing\n * (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n *\n * @param {Document} htmlDocument Native `Document` object in which spacing should be normalized.\n */\nexport function normalizeSpacerunSpans( htmlDocument ) {\n\thtmlDocument.querySelectorAll( 'span[style*=spacerun]' ).forEach( el => {\n\t\t// Use `el.childNodes[ 0 ].data.length` instead of `el.innerText.length`. For `el.innerText.length` which\n\t\t// contains spaces mixed with ` ` Edge browser returns incorrect length.\n\t\tconst innerTextLength = ( el.childNodes &&\n\t\t\tel.childNodes[ 0 ] &&\n\t\t\tel.childNodes[ 0 ].data &&\n\t\t\tel.childNodes[ 0 ].data.length ) || 0;\n\n\t\tel.innerHTML = Array( innerTextLength + 1 ).join( '\\u00A0 ' ).substr( 0, innerTextLength );\n\t} );\n}\n\n// Normalizes specific spacing generated by Safari when content pasted from Word (`<span class=\"Apple-converted-space\"> </span>`)\n// by replacing all spaces sequences longer than 1 space with `  ` pairs. This prevents spaces from being removed during\n// further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n//\n// This function is similar to {@link module:clipboard/utils/normalizeclipboarddata normalizeClipboardData util} but uses\n// regular spaces /   sequence for replacement.\n//\n// @param {String} htmlString HTML string in which spacing should be normalized\n// @returns {String} Input HTML with spaces normalized.\nfunction normalizeSafariSpaceSpans( htmlString ) {\n\treturn htmlString.replace( /<span(?: class=\"Apple-converted-space\"|)>(\\s+)<\\/span>/g, ( fullMatch, spaces ) => {\n\t\treturn spaces.length === 1 ? ' ' : Array( spaces.length + 1 ).join( '\\u00A0 ' ).substr( 0, spaces.length );\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/normalizers/mswordnormalizer\n */\n\nimport { parseHtml } from '../filters/parse';\nimport { transformListItemLikeElementsIntoLists } from '../filters/list';\nimport { replaceImagesSourceWithBase64 } from '../filters/image';\n\nconst msWordMatch1 = /<meta\\s*name=\"?generator\"?\\s*content=\"?microsoft\\s*word\\s*\\d+\"?\\/?>/i;\nconst msWordMatch2 = /xmlns:o=\"urn:schemas-microsoft-com/i;\n\n/**\n * Normalizer for the content pasted from Microsoft Word.\n *\n * @implements module:paste-from-office/normalizer~Normalizer\n */\nexport default class MSWordNormalizer {\n\t/**\n\t * @inheritDoc\n\t */\n\tisActive( htmlString ) {\n\t\treturn msWordMatch1.test( htmlString ) || msWordMatch2.test( htmlString );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute( data ) {\n\t\tconst { body, stylesString } = parseHtml( data.dataTransfer.getData( 'text/html' ) );\n\n\t\ttransformListItemLikeElementsIntoLists( body, stylesString );\n\t\treplaceImagesSourceWithBase64( body, data.dataTransfer.getData( 'text/rtf' ) );\n\n\t\tdata.content = body;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/parse\n */\n\n/* globals DOMParser */\n\nimport DomConverter from '@ckeditor/ckeditor5-engine/src/view/domconverter';\n\nimport { normalizeSpacing, normalizeSpacerunSpans } from './space';\n\n/**\n * Parses provided HTML extracting contents of `<body>` and `<style>` tags.\n *\n * @param {String} htmlString HTML string to be parsed.\n * @returns {Object} result\n * @returns {module:engine/view/documentfragment~DocumentFragment} result.body Parsed body\n * content as a traversable structure.\n * @returns {String} result.bodyString Entire body content as a string.\n * @returns {Array.<CSSStyleSheet>} result.styles Array of native `CSSStyleSheet` objects, each representing\n * separate `style` tag from the source HTML.\n * @returns {String} result.stylesString All `style` tags contents combined in the order of occurrence into one string.\n */\nexport function parseHtml( htmlString ) {\n\tconst domParser = new DOMParser();\n\n\t// Remove Word specific \"if comments\" so content inside is not omitted by the parser.\n\thtmlString = htmlString.replace( /<!--\\[if gte vml 1]>/g, '' );\n\n\tconst normalizedHtml = normalizeSpacing( cleanContentAfterBody( htmlString ) );\n\n\t// Parse htmlString as native Document object.\n\tconst htmlDocument = domParser.parseFromString( normalizedHtml, 'text/html' );\n\n\tnormalizeSpacerunSpans( htmlDocument );\n\n\t// Get `innerHTML` first as transforming to View modifies the source document.\n\tconst bodyString = htmlDocument.body.innerHTML;\n\n\t// Transform document.body to View.\n\tconst bodyView = documentToView( htmlDocument );\n\n\t// Extract stylesheets.\n\tconst stylesObject = extractStyles( htmlDocument );\n\n\treturn {\n\t\tbody: bodyView,\n\t\tbodyString,\n\t\tstyles: stylesObject.styles,\n\t\tstylesString: stylesObject.stylesString\n\t};\n}\n\n// Transforms native `Document` object into {@link module:engine/view/documentfragment~DocumentFragment}.\n//\n// @param {Document} htmlDocument Native `Document` object to be transformed.\n// @returns {module:engine/view/documentfragment~DocumentFragment}\nfunction documentToView( htmlDocument ) {\n\tconst domConverter = new DomConverter( { blockFillerMode: 'nbsp' } );\n\tconst fragment = htmlDocument.createDocumentFragment();\n\tconst nodes = htmlDocument.body.childNodes;\n\n\twhile ( nodes.length > 0 ) {\n\t\tfragment.appendChild( nodes[ 0 ] );\n\t}\n\n\treturn domConverter.domToView( fragment );\n}\n\n// Extracts both `CSSStyleSheet` and string representation from all `style` elements available in a provided `htmlDocument`.\n//\n// @param {Document} htmlDocument Native `Document` object from which styles will be extracted.\n// @returns {Object} result\n// @returns {Array.<CSSStyleSheet>} result.styles Array of native `CSSStyleSheet` object, each representing\n// separate `style` tag from the source object.\n// @returns {String} result.stylesString All `style` tags contents combined in the order of occurrence as one string.\nfunction extractStyles( htmlDocument ) {\n\tconst styles = [];\n\tconst stylesString = [];\n\tconst styleTags = Array.from( htmlDocument.getElementsByTagName( 'style' ) );\n\n\tfor ( const style of styleTags ) {\n\t\tif ( style.sheet && style.sheet.cssRules && style.sheet.cssRules.length ) {\n\t\t\tstyles.push( style.sheet );\n\t\t\tstylesString.push( style.innerHTML );\n\t\t}\n\t}\n\n\treturn {\n\t\tstyles,\n\t\tstylesString: stylesString.join( ' ' )\n\t};\n}\n\n// Removes leftover content from between closing </body> and closing </html> tag:\n//\n// \t\t<html><body><p>Foo Bar</p></body><span>Fo</span></html> -> <html><body><p>Foo Bar</p></body></html>\n//\n// This function is used as specific browsers (Edge) add some random content after `body` tag when pasting from Word.\n// @param {String} htmlString The HTML string to be cleaned.\n// @returns {String} The HTML string with leftover content removed.\nfunction cleanContentAfterBody( htmlString ) {\n\tconst regexp = /<\\/body>(.*?)(<\\/html>|$)/;\n\tconst match = htmlString.match( regexp );\n\n\tif ( match && match[ 1 ] ) {\n\t\thtmlString = htmlString.slice( 0, match.index ) + htmlString.slice( match.index ).replace( match[ 1 ], '' );\n\t}\n\n\treturn htmlString;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/image\n */\n\n/* globals btoa */\n\nimport ViewMatcher from '@ckeditor/ckeditor5-engine/src/view/matcher';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\n/**\n * Replaces source attribute of all `<img>` elements representing regular\n * images (not the Word shapes) with inlined base64 image representation extracted from RTF or Blob data.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment on which transform images.\n * @param {String} rtfData The RTF data from which images representation will be used.\n */\nexport function replaceImagesSourceWithBase64( documentFragment, rtfData ) {\n\tif ( !documentFragment.childCount ) {\n\t\treturn;\n\t}\n\n\tconst upcastWriter = new UpcastWriter();\n\tconst shapesIds = findAllShapesIds( documentFragment, upcastWriter );\n\n\tremoveAllImgElementsRepresentingShapes( shapesIds, documentFragment, upcastWriter );\n\tremoveAllShapeElements( documentFragment, upcastWriter );\n\n\tconst images = findAllImageElementsWithLocalSource( documentFragment, upcastWriter );\n\n\tif ( images.length ) {\n\t\treplaceImagesFileSourceWithInlineRepresentation( images, extractImageDataFromRtf( rtfData ), upcastWriter );\n\t}\n}\n\n/**\n * Converts given HEX string to base64 representation.\n *\n * @protected\n * @param {String} hexString The HEX string to be converted.\n * @returns {String} Base64 representation of a given HEX string.\n */\nexport function _convertHexToBase64( hexString ) {\n\treturn btoa( hexString.match( /\\w{2}/g ).map( char => {\n\t\treturn String.fromCharCode( parseInt( char, 16 ) );\n\t} ).join( '' ) );\n}\n\n// Finds all shapes (`<v:*>...</v:*>`) ids. Shapes can represent images (canvas)\n// or Word shapes (which does not have RTF or Blob representation).\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment\n// from which to extract shape ids.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Array.<String>} Array of shape ids.\nfunction findAllShapesIds( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst shapeElementsMatcher = new ViewMatcher( {\n\t\tname: /v:(.+)/\n\t} );\n\n\tconst shapesIds = [];\n\n\tfor ( const value of range ) {\n\t\tconst el = value.item;\n\t\tconst prevSiblingName = el.previousSibling && el.previousSibling.name || null;\n\n\t\t// If shape element have 'o:gfxdata' attribute and is not directly before `<v:shapetype>` element it means it represent Word shape.\n\t\tif ( shapeElementsMatcher.match( el ) && el.getAttribute( 'o:gfxdata' ) && prevSiblingName !== 'v:shapetype' ) {\n\t\t\tshapesIds.push( value.item.getAttribute( 'id' ) );\n\t\t}\n\t}\n\n\treturn shapesIds;\n}\n\n// Removes all `<img>` elements which represents Word shapes and not regular images.\n//\n// @param {Array.<String>} shapesIds Shape ids which will be checked against `<img>` elements.\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment from which to remove `<img>` elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeAllImgElementsRepresentingShapes( shapesIds, documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst imageElementsMatcher = new ViewMatcher( {\n\t\tname: 'img'\n\t} );\n\n\tconst imgs = [];\n\n\tfor ( const value of range ) {\n\t\tif ( imageElementsMatcher.match( value.item ) ) {\n\t\t\tconst el = value.item;\n\t\t\tconst shapes = el.getAttribute( 'v:shapes' ) ? el.getAttribute( 'v:shapes' ).split( ' ' ) : [];\n\n\t\t\tif ( shapes.length && shapes.every( shape => shapesIds.indexOf( shape ) > -1 ) ) {\n\t\t\t\timgs.push( el );\n\t\t\t// Shapes may also have empty source while content is paste in some browsers (Safari).\n\t\t\t} else if ( !el.getAttribute( 'src' ) ) {\n\t\t\t\timgs.push( el );\n\t\t\t}\n\t\t}\n\t}\n\n\tfor ( const img of imgs ) {\n\t\twriter.remove( img );\n\t}\n}\n\n// Removes all shape elements (`<v:*>...</v:*>`) so they do not pollute the output structure.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment from which to remove shape elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeAllShapeElements( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst shapeElementsMatcher = new ViewMatcher( {\n\t\tname: /v:(.+)/\n\t} );\n\n\tconst shapes = [];\n\n\tfor ( const value of range ) {\n\t\tif ( shapeElementsMatcher.match( value.item ) ) {\n\t\t\tshapes.push( value.item );\n\t\t}\n\t}\n\n\tfor ( const shape of shapes ) {\n\t\twriter.remove( shape );\n\t}\n}\n\n// Finds all `<img>` elements in a given document fragment which have source pointing to local `file://` resource.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment in which to look for `<img>` elements.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Object} result All found images grouped by source type.\n// @returns {Array.<module:engine/view/element~Element>} result.file Array of found `<img>` elements with `file://` source.\n// @returns {Array.<module:engine/view/element~Element>} result.blob Array of found `<img>` elements with `blob:` source.\nfunction findAllImageElementsWithLocalSource( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\tconst imageElementsMatcher = new ViewMatcher( {\n\t\tname: 'img'\n\t} );\n\n\tconst imgs = [];\n\n\tfor ( const value of range ) {\n\t\tif ( imageElementsMatcher.match( value.item ) ) {\n\t\t\tif ( value.item.getAttribute( 'src' ).startsWith( 'file://' ) ) {\n\t\t\t\timgs.push( value.item );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn imgs;\n}\n\n// Extracts all images HEX representations from a given RTF data.\n//\n// @param {String} rtfData The RTF data from which to extract images HEX representation.\n// @returns {Array.<Object>} Array of found HEX representations. Each array item is an object containing:\n//\n// \t\t* {String} hex Image representation in HEX format.\n// \t\t* {string} type Type of image, `image/png` or `image/jpeg`.\nfunction extractImageDataFromRtf( rtfData ) {\n\tif ( !rtfData ) {\n\t\treturn [];\n\t}\n\n\tconst regexPictureHeader = /{\\\\pict[\\s\\S]+?\\\\bliptag-?\\d+(\\\\blipupi-?\\d+)?({\\\\\\*\\\\blipuid\\s?[\\da-fA-F]+)?[\\s}]*?/;\n\tconst regexPicture = new RegExp( '(?:(' + regexPictureHeader.source + '))([\\\\da-fA-F\\\\s]+)\\\\}', 'g' );\n\tconst images = rtfData.match( regexPicture );\n\tconst result = [];\n\n\tif ( images ) {\n\t\tfor ( const image of images ) {\n\t\t\tlet imageType = false;\n\n\t\t\tif ( image.includes( '\\\\pngblip' ) ) {\n\t\t\t\timageType = 'image/png';\n\t\t\t} else if ( image.includes( '\\\\jpegblip' ) ) {\n\t\t\t\timageType = 'image/jpeg';\n\t\t\t}\n\n\t\t\tif ( imageType ) {\n\t\t\t\tresult.push( {\n\t\t\t\t\thex: image.replace( regexPictureHeader, '' ).replace( /[^\\da-fA-F]/g, '' ),\n\t\t\t\t\ttype: imageType\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\t}\n\n\treturn result;\n}\n\n// Replaces `src` attribute value of all given images with the corresponding base64 image representation.\n//\n// @param {Array.<module:engine/view/element~Element>} imageElements Array of image elements which will have its source replaced.\n// @param {Array.<Object>} imagesHexSources Array of images hex sources (usually the result of `extractImageDataFromRtf()` function).\n// The array should be the same length as `imageElements` parameter.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction replaceImagesFileSourceWithInlineRepresentation( imageElements, imagesHexSources, writer ) {\n\t// Assume there is an equal amount of image elements and images HEX sources so they can be matched accordingly based on existing order.\n\tif ( imageElements.length === imagesHexSources.length ) {\n\t\tfor ( let i = 0; i < imageElements.length; i++ ) {\n\t\t\tconst newSrc = `data:${ imagesHexSources[ i ].type };base64,${ _convertHexToBase64( imagesHexSources[ i ].hex ) }`;\n\t\t\twriter.setAttribute( 'src', newSrc, imageElements[ i ] );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/utils\n */\n\n/**\n * Returns the parent element of given name. Returns undefined if position is not inside desired parent.\n *\n * @param {String} parentName Name of parent element to find.\n * @param {module:engine/model/position~Position|module:engine/model/position~Position} position Position to start searching.\n * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n */\nexport function findAncestor( parentName, position ) {\n\tlet parent = position.parent;\n\n\twhile ( parent ) {\n\t\tif ( parent.name === parentName ) {\n\t\t\treturn parent;\n\t\t}\n\n\t\tparent = parent.parent;\n\t}\n}\n\n/**\n * A common method to update the numeric value. If a value is the default one, it will be unset.\n *\n * @param {String} key Attribute key.\n * @param {*} value The new attribute value.\n * @param {module:engine/model/item~Item} item Model item on which the attribute will be set.\n * @param {module:engine/model/writer~Writer} writer\n * @param {*} defaultValue Default attribute value. If a value is lower or equal, it will be unset.\n */\nexport function updateNumericAttribute( key, value, item, writer, defaultValue = 1 ) {\n\tif ( value > defaultValue ) {\n\t\twriter.setAttribute( key, value, item );\n\t} else {\n\t\twriter.removeAttribute( key, item );\n\t}\n}\n\n/**\n * Common method to create empty table cell - it will create proper model structure as table cell must have at least one block inside.\n *\n * @param {module:engine/model/writer~Writer} writer Model writer.\n * @param {module:engine/model/position~Position} insertPosition Position at which table cell should be inserted.\n * @param {Object} attributes Element's attributes.\n */\nexport function createEmptyTableCell( writer, insertPosition, attributes = {} ) {\n\tconst tableCell = writer.createElement( 'tableCell', attributes );\n\twriter.insertElement( 'paragraph', tableCell );\n\twriter.insert( tableCell, insertPosition );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/upcasttable\n */\n\nimport { createEmptyTableCell } from '../commands/utils';\n\n/**\n * View table element to model table element conversion helper.\n *\n * This conversion helper converts the table element as well as table rows.\n *\n * @returns {Function} Conversion helper.\n */\nexport default function upcastTable() {\n\treturn dispatcher => {\n\t\tdispatcher.on( 'element:table', ( evt, data, conversionApi ) => {\n\t\t\tconst viewTable = data.viewItem;\n\n\t\t\t// When element was already consumed then skip it.\n\t\t\tif ( !conversionApi.consumable.test( viewTable, { name: true } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst { rows, headingRows, headingColumns } = scanTable( viewTable );\n\n\t\t\t// Only set attributes if values is greater then 0.\n\t\t\tconst attributes = {};\n\n\t\t\tif ( headingColumns ) {\n\t\t\t\tattributes.headingColumns = headingColumns;\n\t\t\t}\n\n\t\t\tif ( headingRows ) {\n\t\t\t\tattributes.headingRows = headingRows;\n\t\t\t}\n\n\t\t\tconst table = conversionApi.writer.createElement( 'table', attributes );\n\n\t\t\t// Insert element on allowed position.\n\t\t\tconst splitResult = conversionApi.splitToAllowedParent( table, data.modelCursor );\n\n\t\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\t\tif ( !splitResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconversionApi.writer.insert( table, splitResult.position );\n\t\t\tconversionApi.consumable.consume( viewTable, { name: true } );\n\n\t\t\tif ( rows.length ) {\n\t\t\t\t// Upcast table rows in proper order (heading rows first).\n\t\t\t\trows.forEach( row => conversionApi.convertItem( row, conversionApi.writer.createPositionAt( table, 'end' ) ) );\n\t\t\t} else {\n\t\t\t\t// Create one row and one table cell for empty table.\n\t\t\t\tconst row = conversionApi.writer.createElement( 'tableRow' );\n\t\t\t\tconversionApi.writer.insert( row, conversionApi.writer.createPositionAt( table, 'end' ) );\n\n\t\t\t\tcreateEmptyTableCell( conversionApi.writer, conversionApi.writer.createPositionAt( row, 'end' ) );\n\t\t\t}\n\n\t\t\t// Set conversion result range.\n\t\t\tdata.modelRange = conversionApi.writer.createRange(\n\t\t\t\t// Range should start before inserted element\n\t\t\t\tconversionApi.writer.createPositionBefore( table ),\n\t\t\t\t// Should end after but we need to take into consideration that children could split our\n\t\t\t\t// element, so we need to move range after parent of the last converted child.\n\t\t\t\t// before: <allowed>[]</allowed>\n\t\t\t\t// after: <allowed>[<converted><child></child></converted><child></child><converted>]</converted></allowed>\n\t\t\t\tconversionApi.writer.createPositionAfter( table )\n\t\t\t);\n\n\t\t\t// Now we need to check where the modelCursor should be.\n\t\t\t// If we had to split parent to insert our element then we want to continue conversion inside split parent.\n\t\t\t//\n\t\t\t// before: <allowed><notAllowed>[]</notAllowed></allowed>\n\t\t\t// after: <allowed><notAllowed></notAllowed><converted></converted><notAllowed>[]</notAllowed></allowed>\n\t\t\tif ( splitResult.cursorParent ) {\n\t\t\t\tdata.modelCursor = conversionApi.writer.createPositionAt( splitResult.cursorParent, 0 );\n\n\t\t\t\t// Otherwise just continue after inserted element.\n\t\t\t} else {\n\t\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t\t}\n\t\t} );\n\t};\n}\n\nexport function upcastTableCell( elementName ) {\n\treturn dispatcher => {\n\t\tdispatcher.on( `element:${ elementName }`, ( evt, data, conversionApi ) => {\n\t\t\tconst viewTableCell = data.viewItem;\n\n\t\t\t// When element was already consumed then skip it.\n\t\t\tif ( !conversionApi.consumable.test( viewTableCell, { name: true } ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst tableCell = conversionApi.writer.createElement( 'tableCell' );\n\n\t\t\t// Insert element on allowed position.\n\t\t\tconst splitResult = conversionApi.splitToAllowedParent( tableCell, data.modelCursor );\n\n\t\t\t// When there is no split result it means that we can't insert element to model tree, so let's skip it.\n\t\t\tif ( !splitResult ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconversionApi.writer.insert( tableCell, splitResult.position );\n\t\t\tconversionApi.consumable.consume( viewTableCell, { name: true } );\n\n\t\t\tconst modelCursor = conversionApi.writer.createPositionAt( tableCell, 0 );\n\t\t\tconversionApi.convertChildren( viewTableCell, modelCursor );\n\n\t\t\t// Ensure a paragraph in the model for empty table cells.\n\t\t\tif ( !tableCell.childCount ) {\n\t\t\t\tconversionApi.writer.insertElement( 'paragraph', modelCursor );\n\t\t\t}\n\n\t\t\t// Set conversion result range.\n\t\t\tdata.modelRange = conversionApi.writer.createRange(\n\t\t\t\t// Range should start before inserted element\n\t\t\t\tconversionApi.writer.createPositionBefore( tableCell ),\n\t\t\t\t// Should end after but we need to take into consideration that children could split our\n\t\t\t\t// element, so we need to move range after parent of the last converted child.\n\t\t\t\t// before: <allowed>[]</allowed>\n\t\t\t\t// after: <allowed>[<converted><child></child></converted><child></child><converted>]</converted></allowed>\n\t\t\t\tconversionApi.writer.createPositionAfter( tableCell )\n\t\t\t);\n\n\t\t\t// Continue after inserted element.\n\t\t\tdata.modelCursor = data.modelRange.end;\n\t\t} );\n\t};\n}\n\n// Scans table rows and extracts required metadata from the table:\n//\n// headingRows - the number of rows that goes as table header.\n// headingColumns - max number of row headings.\n// rows - sorted `<tr>`s as they should go into the model - ie. if `<thead>` is inserted after `<tbody>` in the view.\n//\n// @param {module:engine/view/element~Element} viewTable\n// @returns {{headingRows, headingColumns, rows}}\nfunction scanTable( viewTable ) {\n\tconst tableMeta = {\n\t\theadingRows: 0,\n\t\theadingColumns: 0\n\t};\n\n\t// The `<tbody>` and <thead> sections in the DOM do not have to be in order `<thead>` -> `<tbody>` and there might be more then one of\n\t// them.\n\t// As the model does not have those sections, rows from different sections must be sorted.\n\t// For example, below is a valid HTML table:\n\t//\n\t//\t\t<table>\n\t//\t\t\t<tbody><tr><td>2</td></tr></tbody>\n\t//\t\t\t<thead><tr><td>1</td></tr></thead>\n\t//\t\t\t<tbody><tr><td>3</td></tr></tbody>\n\t//\t\t</table>\n\t//\n\t// But browsers will render rows in order as: 1 as heading and 2 and 3 as (body).\n\tconst headRows = [];\n\tconst bodyRows = [];\n\n\t// Currently the editor does not support more then one <thead> section.\n\t// Only the first <thead> from the view will be used as heading rows and others will be converted to body rows.\n\tlet firstTheadElement;\n\n\tfor ( const tableChild of Array.from( viewTable.getChildren() ) ) {\n\t\t// Only <thead>, <tbody> & <tfoot> from allowed table children can have <tr>s.\n\t\t// The else is for future purposes (mainly <caption>).\n\t\tif ( tableChild.name === 'tbody' || tableChild.name === 'thead' || tableChild.name === 'tfoot' ) {\n\t\t\t// Save the first <thead> in the table as table header - all other ones will be converted to table body rows.\n\t\t\tif ( tableChild.name === 'thead' && !firstTheadElement ) {\n\t\t\t\tfirstTheadElement = tableChild;\n\t\t\t}\n\n\t\t\t// There might be some extra empty text nodes between the `tr`s.\n\t\t\t// Make sure further code operates on `tr`s only. (#145)\n\t\t\tconst trs = Array.from( tableChild.getChildren() ).filter( el => el.is( 'element', 'tr' ) );\n\n\t\t\tfor ( const tr of trs ) {\n\t\t\t\t// This <tr> is a child of a first <thead> element.\n\t\t\t\tif ( tr.parent.name === 'thead' && tr.parent === firstTheadElement ) {\n\t\t\t\t\ttableMeta.headingRows++;\n\t\t\t\t\theadRows.push( tr );\n\t\t\t\t} else {\n\t\t\t\t\tbodyRows.push( tr );\n\t\t\t\t\t// For other rows check how many column headings this row has.\n\n\t\t\t\t\tconst headingCols = scanRowForHeadingColumns( tr, tableMeta, firstTheadElement );\n\n\t\t\t\t\tif ( headingCols > tableMeta.headingColumns ) {\n\t\t\t\t\t\ttableMeta.headingColumns = headingCols;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\ttableMeta.rows = [ ...headRows, ...bodyRows ];\n\n\treturn tableMeta;\n}\n\n// Scans `<tr>` and its children for metadata:\n// - For heading row:\n// - either adds this row to heading or body rows.\n// - updates number of heading rows.\n// - For body rows:\n// - calculates the number of column headings.\n//\n// @param {module:engine/view/element~Element} tr\n// @returns {Number}\nfunction scanRowForHeadingColumns( tr ) {\n\tlet headingColumns = 0;\n\tlet index = 0;\n\n\t// Filter out empty text nodes from tr children.\n\tconst children = Array.from( tr.getChildren() )\n\t\t.filter( child => child.name === 'th' || child.name === 'td' );\n\n\t// Count starting adjacent <th> elements of a <tr>.\n\twhile ( index < children.length && children[ index ].name === 'th' ) {\n\t\tconst th = children[ index ];\n\n\t\t// Adjust columns calculation by the number of spanned columns.\n\t\tconst colspan = parseInt( th.getAttribute( 'colspan' ) || 1 );\n\n\t\theadingColumns = headingColumns + colspan;\n\t\tindex++;\n\t}\n\n\treturn headingColumns;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tablewalker\n */\n\n/**\n * Table iterator class. It allows to iterate over table cells. For each cell the iterator yields\n * {@link module:table/tablewalker~TableWalkerValue} with proper table cell attributes.\n */\nexport default class TableWalker {\n\t/**\n\t * Creates an instance of the table walker.\n\t *\n\t * The table walker iterates internally by traversing the table from row index = 0 and column index = 0.\n\t * It walks row by row and column by column in order to output values defined in the constructor.\n\t * By default it will output only those locations that are occupied by a cell. To include also spanned rows and columns,\n\t * pass the `includeSpanned` option to the constructor.\n\t *\n\t * The most important values of the iterator are column and row indexes of a cell.\n\t *\n\t * See {@link module:table/tablewalker~TableWalkerValue} what values are returned by the table walker.\n\t *\n\t * To iterate over a given row:\n\t *\n\t *\t\tconst tableWalker = new TableWalker( table, { startRow: 1, endRow: 2 } );\n\t *\n\t *\t\tfor ( const cellInfo of tableWalker ) {\n\t *\t\t\tconsole.log( 'A cell at row ' + cellInfo.row + ' and column ' + cellInfo.column );\n\t *\t\t}\n\t *\n\t * For instance the code above for the following table:\n\t *\n\t *\t\t+----+----+----+----+----+----+\n\t *\t\t| 00 | 02 | 03 | 04 | 05 |\n\t *\t\t| +----+----+----+----+\n\t *\t\t| | 12 | 14 | 15 |\n\t *\t\t| +----+----+----+ +\n\t *\t\t| | 22 | |\n\t *\t\t|----+----+----+----+----+ +\n\t *\t\t| 30 | 31 | 32 | 33 | 34 | |\n\t *\t\t+----+----+----+----+----+----+\n\t *\n\t * will log in the console:\n\t *\n\t *\t\t'A cell at row 1 and column 2'\n\t *\t\t'A cell at row 1 and column 4'\n\t *\t\t'A cell at row 1 and column 5'\n\t *\t\t'A cell at row 2 and column 2'\n\t *\n\t * To also iterate over spanned cells:\n\t *\n\t *\t\tconst tableWalker = new TableWalker( table, { startRow: 1, endRow: 1, includeSpanned: true } );\n\t *\n\t *\t\tfor ( const value of tableWalker ) {\n\t *\t\t\tconsole.log( 'Cell at ' + value.row + ' x ' + value.column + ' : ' + ( value.isSpanned ? 'is spanned' : 'has data' ) );\n\t *\t\t}\n\t *\n\t * will log in the console for the table from previous example:\n\t *\n\t *\t\t'Cell at 1 x 0 : is spanned'\n\t *\t\t'Cell at 1 x 1 : is spanned'\n\t *\t\t'Cell at 1 x 2 : has data'\n\t *\t\t'Cell at 1 x 3 : is spanned'\n\t *\t\t'Cell at 1 x 4 : has data'\n\t *\t\t'Cell at 1 x 5 : has data'\n\t *\n\t * @constructor\n\t * @param {module:engine/model/element~Element} table A table over which the walker iterates.\n\t * @param {Object} [options={}] An object with configuration.\n\t * @param {Number} [options.column] A column index for which this iterator will output cells.\n\t * @param {Number} [options.startRow=0] A row index for which this iterator should start.\n\t * @param {Number} [options.endRow] A row index for which this iterator should end.\n\t * @param {Boolean} [options.includeSpanned=false] Also return values for spanned cells.\n\t */\n\tconstructor( table, options = {} ) {\n\t\t/**\n\t\t * The walker's table element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element}\n\t\t */\n\t\tthis.table = table;\n\n\t\t/**\n\t\t * A row index on which this iterator will start.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.startRow = options.startRow || 0;\n\n\t\t/**\n\t\t * A row index on which this iterator will end.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.endRow = typeof options.endRow == 'number' ? options.endRow : undefined;\n\n\t\t/**\n\t\t * Enables output of spanned cells that are normally not yielded.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.includeSpanned = !!options.includeSpanned;\n\n\t\t/**\n\t\t * If set, the table walker will only output cells of a given column or cells that overlap it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t */\n\t\tthis.column = typeof options.column == 'number' ? options.column : undefined;\n\n\t\t/**\n\t\t * Row indexes to skip from the iteration.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set<Number>}\n\t\t * @private\n\t\t */\n\t\tthis._skipRows = new Set();\n\n\t\t/**\n\t\t * The current row index.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._row = 0;\n\n\t\t/**\n\t\t * The current column index.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._column = 0;\n\n\t\t/**\n\t\t * The cell index in a parent row. For spanned cells when {@link #includeSpanned} is set to `true`,\n\t\t * this represents the index of the next table cell.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number}\n\t\t * @private\n\t\t */\n\t\tthis._cellIndex = 0;\n\n\t\t/**\n\t\t * Holds a map of spanned cells in a table.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Map<Number, Map.<Number, module:engine/model/element~Element>>}\n\t\t * @private\n\t\t */\n\t\tthis._spannedCells = new Map();\n\n\t\tthis._nextCellAtColumn = -1;\n\t}\n\n\t/**\n\t * Iterable interface.\n\t *\n\t * @returns {Iterable.<module:table/tablewalker~TableWalkerValue>}\n\t */\n\t[ Symbol.iterator ]() {\n\t\treturn this;\n\t}\n\n\t/**\n\t * Gets the next table walker's value.\n\t *\n\t * @returns {module:table/tablewalker~TableWalkerValue} The next table walker's value.\n\t */\n\tnext() {\n\t\tconst row = this.table.getChild( this._row );\n\n\t\t// Iterator is done when there's no row (table ended) or the row is after `endRow` limit.\n\t\tif ( !row || this._isOverEndRow() ) {\n\t\t\treturn { done: true };\n\t\t}\n\n\t\tlet cell, skipCurrentValue, outValue;\n\n\t\tif ( this._isSpanned( this._row, this._column ) ) {\n\t\t\tcell = this._getSpanned( this._row, this._column );\n\n\t\t\tskipCurrentValue = !this.includeSpanned || this._shouldSkipRow() || this._shouldSkipColumn();\n\t\t\toutValue = this._formatOutValue( cell, this._column, true );\n\t\t} else {\n\t\t\tcell = row.getChild( this._cellIndex );\n\n\t\t\tif ( !cell ) {\n\t\t\t\t// If there are no more cells left in row advance to the next row.\n\t\t\t\tthis._row++;\n\t\t\t\tthis._column = 0;\n\t\t\t\tthis._cellIndex = 0;\n\t\t\t\tthis._nextCellAtColumn = -1;\n\n\t\t\t\treturn this.next();\n\t\t\t}\n\n\t\t\tconst colspan = parseInt( cell.getAttribute( 'colspan' ) || 1 );\n\t\t\tconst rowspan = parseInt( cell.getAttribute( 'rowspan' ) || 1 );\n\n\t\t\t// Record this cell spans if it's not 1x1 cell.\n\t\t\tif ( colspan > 1 || rowspan > 1 ) {\n\t\t\t\tthis._recordSpans( this._row, this._column, rowspan, colspan, cell );\n\t\t\t}\n\n\t\t\tthis._nextCellAtColumn = this._column + colspan;\n\n\t\t\tskipCurrentValue = this._shouldSkipRow() || this._shouldSkipColumn();\n\t\t\toutValue = this._formatOutValue( cell, this._column, false, rowspan, colspan );\n\t\t}\n\n\t\t// Advance to the next column before returning value.\n\t\tthis._column++;\n\n\t\tif ( this._column == this._nextCellAtColumn ) {\n\t\t\tthis._cellIndex++;\n\t\t}\n\n\t\t// The current value will be returned only if current row and column are not skipped.\n\t\treturn skipCurrentValue ? this.next() : outValue;\n\t}\n\n\t/**\n\t * Marks a row to skip in the next iteration. It will also skip cells from the current row if there are any cells from the current row\n\t * to output.\n\t *\n\t * @param {Number} row Row index to skip.\n\t */\n\tskipRow( row ) {\n\t\tthis._skipRows.add( row );\n\t}\n\n\t/**\n\t * Checks if the current row is over {@link #endRow}.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_isOverEndRow() {\n\t\t// If {@link #endRow) is defined skip all rows above it.\n\t\treturn this.endRow !== undefined && this._row > this.endRow;\n\t}\n\n\t/**\n\t * A common method for formatting the iterator's output value.\n\t *\n\t * @private\n\t * @param {module:engine/model/element~Element} cell The table cell to output.\n\t * @param {Number} column Column index (use the cached value).\n\t * @param {Boolean} isSpanned Whether the value is returned for a spanned cell location or actual cell.\n\t * @param {Number} rowspan Rowspan of the current cell.\n\t * @param {Number} colspan Colspan of the current cell.\n\t * @returns {{done: boolean, value: {cell: *, row: Number, column: *, rowspan: *, colspan: *, cellIndex: Number}}}\n\t */\n\t_formatOutValue( cell, column, isSpanned, rowspan = 1, colspan = 1 ) {\n\t\treturn {\n\t\t\tdone: false,\n\t\t\tvalue: {\n\t\t\t\tcell,\n\t\t\t\trow: this._row,\n\t\t\t\tcolumn,\n\t\t\t\tisSpanned,\n\t\t\t\trowspan,\n\t\t\t\tcolspan,\n\t\t\t\tcellIndex: this._cellIndex\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Checks if the current row should be skipped.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_shouldSkipRow() {\n\t\tconst rowIsBelowStartRow = this._row < this.startRow;\n\t\tconst rowIsMarkedAsSkipped = this._skipRows.has( this._row );\n\n\t\treturn rowIsBelowStartRow || rowIsMarkedAsSkipped;\n\t}\n\n\t/**\n\t * Checks if the current column should be skipped.\n\t *\n\t * @private\n\t * @returns {Boolean}\n\t */\n\t_shouldSkipColumn() {\n\t\tif ( this.column === undefined ) {\n\t\t\t// The {@link #column} is not defined so output all columns.\n\t\t\treturn false;\n\t\t}\n\n\t\treturn this.column != this._column;\n\t}\n\n\t/**\n\t * Checks if the current cell location (row x column) is spanned by another cell.\n\t *\n\t * @private\n\t * @param {Number} row Row index of a cell location to check.\n\t * @param {Number} column Column index of a cell location to check.\n\t * @returns {Boolean}\n\t */\n\t_isSpanned( row, column ) {\n\t\tif ( !this._spannedCells.has( row ) ) {\n\t\t\t// No spans for given row.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst rowSpans = this._spannedCells.get( row );\n\n\t\t// If spans for given rows has entry for column it means that this location if spanned by other cell.\n\t\treturn rowSpans.has( column );\n\t}\n\n\t/**\n\t * Returns the cell element that is spanned over `row` x `column` location.\n\t *\n\t * @private\n\t * @param {Number} row Row index of the cell location.\n\t * @param {Number} column Column index of the cell location.\n\t * @returns {module:engine/model/element~Element}\n\t */\n\t_getSpanned( row, column ) {\n\t\treturn this._spannedCells.get( row ).get( column );\n\t}\n\n\t/**\n\t * Updates spanned cells map relative to the current cell location and its span dimensions.\n\t *\n\t * @private\n\t * @param {Number} row Row index of a cell.\n\t * @param {Number} column Column index of a cell.\n\t * @param {Number} rowspan Cell height.\n\t * @param {Number} colspan Cell width.\n\t * @param {module:engine/model/element~Element} cell Cell that is spanned.\n\t */\n\t_recordSpans( row, column, rowspan, colspan, cell ) {\n\t\t// This will update all cell locations after current column - ie a cell has colspan set.\n\t\tfor ( let columnToUpdate = column + 1; columnToUpdate <= column + colspan - 1; columnToUpdate++ ) {\n\t\t\tthis._markSpannedCell( row, columnToUpdate, cell );\n\t\t}\n\n\t\t// This will update all rows below current up to row's height.\n\t\tfor ( let rowToUpdate = row + 1; rowToUpdate < row + rowspan; rowToUpdate++ ) {\n\t\t\tfor ( let columnToUpdate = column; columnToUpdate <= column + colspan - 1; columnToUpdate++ ) {\n\t\t\t\tthis._markSpannedCell( rowToUpdate, columnToUpdate, cell );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Marks the cell location as spanned by another cell.\n\t *\n\t * @private\n\t * @param {Number} row Row index of the cell location.\n\t * @param {Number} column Column index of the cell location.\n\t * @param {module:engine/model/element~Element} cell Cell that is spanned.\n\t */\n\t_markSpannedCell( row, column, cell ) {\n\t\tif ( !this._spannedCells.has( row ) ) {\n\t\t\tthis._spannedCells.set( row, new Map() );\n\t\t}\n\n\t\tconst rowSpans = this._spannedCells.get( row );\n\n\t\trowSpans.set( column, cell );\n\t}\n}\n\n/**\n * An object returned by {@link module:table/tablewalker~TableWalker} when traversing table cells.\n *\n * @typedef {Object} module:table/tablewalker~TableWalkerValue\n * @property {module:engine/model/element~Element} cell The current table cell.\n * @property {Number} row The row index of a cell.\n * @property {Number} column The column index of a cell. Column index is adjusted to widths and heights of previous cells.\n * @param {Boolean} isSpanned Whether the value is returned for a spanned cell location or actual cell.\n * @property {Number} colspan The `colspan` attribute of a cell. It the model attribute is not present, it is set to `1`. For spanned\n * table locations, it is set to `1`.\n * @property {Number} rowspan The `rowspan` attribute of a cell. It the model attribute is not present, it is set to `1`. For spanned\n * table locations, it is set to `1`.\n * @property {Number} cellIndex The index of the current cell in a parent row.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/utils\n */\n\nimport { isWidget, toWidget } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { findAncestor } from './commands/utils';\n\n/**\n * Converts a given {@link module:engine/view/element~Element} to a table widget:\n * * Adds a {@link module:engine/view/element~Element#_setCustomProperty custom property} allowing to recognize the table widget element.\n * * Calls the {@link module:widget/utils~toWidget} function with the proper element's label creator.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @param {module:engine/view/downcastwriter~DowncastWriter} writer An instance of the view writer.\n * @param {String} label The element's label. It will be concatenated with the table `alt` attribute if one is present.\n * @returns {module:engine/view/element~Element}\n */\nexport function toTableWidget( viewElement, writer ) {\n\twriter.setCustomProperty( 'table', true, viewElement );\n\n\treturn toWidget( viewElement, writer, { hasSelectionHandle: true } );\n}\n\n/**\n * Checks if a given view element is a table widget.\n *\n * @param {module:engine/view/element~Element} viewElement\n * @returns {Boolean}\n */\nexport function isTableWidget( viewElement ) {\n\treturn !!viewElement.getCustomProperty( 'table' ) && isWidget( viewElement );\n}\n\n/**\n * Returns a table widget editing view element if one is selected.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getSelectedTableWidget( selection ) {\n\tconst viewElement = selection.getSelectedElement();\n\n\tif ( viewElement && isTableWidget( viewElement ) ) {\n\t\treturn viewElement;\n\t}\n\n\treturn null;\n}\n\n/**\n * Returns a table widget editing view element if one is among selection's ancestors.\n *\n * @param {module:engine/view/selection~Selection|module:engine/view/documentselection~DocumentSelection} selection\n * @returns {module:engine/view/element~Element|null}\n */\nexport function getTableWidgetAncestor( selection ) {\n\tconst parentTable = findAncestor( 'table', selection.getFirstPosition() );\n\n\tif ( parentTable && isTableWidget( parentTable.parent ) ) {\n\t\treturn parentTable.parent;\n\t}\n\n\treturn null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/downcast\n */\n\nimport TableWalker from './../tablewalker';\nimport { toWidgetEditable } from '@ckeditor/ckeditor5-widget/src/utils';\nimport { toTableWidget } from '../utils';\n\n/**\n * Model table element to view table element conversion helper.\n *\n * This conversion helper creates the whole table element with child elements.\n *\n * @param {Object} options\n * @param {Boolean} options.asWidget If set to `true`, the downcast conversion will produce a widget.\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertTable( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( table, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Consume attributes if present to not fire attribute change downcast\n\t\tconversionApi.consumable.consume( table, 'attribute:headingRows:table' );\n\t\tconversionApi.consumable.consume( table, 'attribute:headingColumns:table' );\n\n\t\tconst asWidget = options && options.asWidget;\n\n\t\tconst figureElement = conversionApi.writer.createContainerElement( 'figure', { class: 'table' } );\n\t\tconst tableElement = conversionApi.writer.createContainerElement( 'table' );\n\t\tconversionApi.writer.insert( conversionApi.writer.createPositionAt( figureElement, 0 ), tableElement );\n\n\t\tlet tableWidget;\n\n\t\tif ( asWidget ) {\n\t\t\ttableWidget = toTableWidget( figureElement, conversionApi.writer );\n\t\t}\n\n\t\tconst tableWalker = new TableWalker( table );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// Cache for created table rows.\n\t\tconst viewRows = new Map();\n\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tconst { row, cell } = tableWalkerValue;\n\n\t\t\tconst tableSection = getOrCreateTableSection( getSectionName( row, tableAttributes ), tableElement, conversionApi );\n\t\t\tconst tableRow = table.getChild( row );\n\n\t\t\tconst trElement = viewRows.get( row ) || createTr( tableRow, row, tableSection, conversionApi );\n\t\t\tviewRows.set( row, trElement );\n\n\t\t\t// Consume table cell - it will be always consumed as we convert whole table at once.\n\t\t\tconversionApi.consumable.consume( cell, 'insert' );\n\n\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, 'end' );\n\n\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\t\t}\n\n\t\tconst viewPosition = conversionApi.mapper.toViewPosition( data.range.start );\n\n\t\tconversionApi.mapper.bindElements( table, asWidget ? tableWidget : figureElement );\n\t\tconversionApi.writer.insert( viewPosition, asWidget ? tableWidget : figureElement );\n\t} );\n}\n\n/**\n * Model row element to view `<tr>` element conversion helper.\n *\n * This conversion helper creates the whole `<tr>` element with child elements.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertRow( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:tableRow', ( evt, data, conversionApi ) => {\n\t\tconst tableRow = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( tableRow, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst table = tableRow.parent;\n\n\t\tconst figureElement = conversionApi.mapper.toViewElement( table );\n\t\tconst tableElement = getViewTable( figureElement );\n\n\t\tconst row = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: row, endRow: row } );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// Cache for created table rows.\n\t\tconst viewRows = new Map();\n\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tconst tableSection = getOrCreateTableSection( getSectionName( row, tableAttributes ), tableElement, conversionApi );\n\n\t\t\tconst trElement = viewRows.get( row ) || createTr( tableRow, row, tableSection, conversionApi );\n\t\t\tviewRows.set( row, trElement );\n\n\t\t\t// Consume table cell - it will be always consumed as we convert whole row at once.\n\t\t\tconversionApi.consumable.consume( tableWalkerValue.cell, 'insert' );\n\n\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, 'end' );\n\n\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\t\t}\n\t} );\n}\n\n/**\n * Model table cell element to view `<td>` or `<th>` element conversion helper.\n *\n * This conversion helper will create proper `<th>` elements for table cells that are in the heading section (heading row or column)\n * and `<td>` otherwise.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastInsertCell( options = {} ) {\n\treturn dispatcher => dispatcher.on( 'insert:tableCell', ( evt, data, conversionApi ) => {\n\t\tconst tableCell = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( tableCell, 'insert' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\t\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: rowIndex, endRow: rowIndex } );\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\t// We need to iterate over a table in order to get proper row & column values from a walker\n\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\tif ( tableWalkerValue.cell === tableCell ) {\n\t\t\t\tconst trElement = conversionApi.mapper.toViewElement( tableRow );\n\t\t\t\tconst insertPosition = conversionApi.writer.createPositionAt( trElement, tableRow.getChildIndex( tableCell ) );\n\n\t\t\t\tcreateViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options );\n\n\t\t\t\t// No need to iterate further.\n\t\t\t\treturn;\n\t\t\t}\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on heading rows table attribute change.\n *\n * This converter will:\n *\n * * Rename `<td>` to `<th>` elements or vice versa depending on headings.\n * * Create `<thead>` or `<tbody>` elements if needed.\n * * Remove empty `<thead>` or `<tbody>` if needed.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastTableHeadingRowsChange( options = {} ) {\n\tconst asWidget = !!options.asWidget;\n\n\treturn dispatcher => dispatcher.on( 'attribute:headingRows:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst figureElement = conversionApi.mapper.toViewElement( table );\n\t\tconst viewTable = getViewTable( figureElement );\n\n\t\tconst oldRows = data.attributeOldValue;\n\t\tconst newRows = data.attributeNewValue;\n\n\t\t// The head section has grown so move rows from <tbody> to <thead>.\n\t\tif ( newRows > oldRows ) {\n\t\t\t// Filter out only those rows that are in wrong section.\n\t\t\tconst rowsToMove = Array.from( table.getChildren() ).filter( ( { index } ) => isBetween( index, oldRows - 1, newRows ) );\n\n\t\t\tconst viewTableHead = getOrCreateTableSection( 'thead', viewTable, conversionApi );\n\t\t\tmoveViewRowsToTableSection( rowsToMove, viewTableHead, conversionApi, 'end' );\n\n\t\t\t// Rename all table cells from moved rows to 'th' as they lands in <thead>.\n\t\t\tfor ( const tableRow of rowsToMove ) {\n\t\t\t\tfor ( const tableCell of tableRow.getChildren() ) {\n\t\t\t\t\trenameViewTableCell( tableCell, 'th', conversionApi, asWidget );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Cleanup: this will remove any empty section from the view which may happen when moving all rows from a table section.\n\t\t\tremoveTableSectionIfEmpty( 'tbody', viewTable, conversionApi );\n\t\t}\n\t\t// The head section has shrunk so move rows from <thead> to <tbody>.\n\t\telse {\n\t\t\t// Filter out only those rows that are in wrong section.\n\t\t\tconst rowsToMove = Array.from( table.getChildren() )\n\t\t\t\t.filter( ( { index } ) => isBetween( index, newRows - 1, oldRows ) )\n\t\t\t\t.reverse(); // The rows will be moved from <thead> to <tbody> in reverse order at the beginning of a <tbody>.\n\n\t\t\tconst viewTableBody = getOrCreateTableSection( 'tbody', viewTable, conversionApi );\n\t\t\tmoveViewRowsToTableSection( rowsToMove, viewTableBody, conversionApi, 0 );\n\n\t\t\t// Check if cells moved from <thead> to <tbody> requires renaming to <td> as this depends on current heading columns attribute.\n\t\t\tconst tableWalker = new TableWalker( table, { startRow: newRows ? newRows - 1 : newRows, endRow: oldRows - 1 } );\n\n\t\t\tconst tableAttributes = {\n\t\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t\t};\n\n\t\t\tfor ( const tableWalkerValue of tableWalker ) {\n\t\t\t\trenameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget );\n\t\t\t}\n\n\t\t\t// Cleanup: this will remove any empty section from the view which may happen when moving all rows from a table section.\n\t\t\tremoveTableSectionIfEmpty( 'thead', viewTable, conversionApi );\n\t\t}\n\n\t\tfunction isBetween( index, lower, upper ) {\n\t\t\treturn index > lower && index < upper;\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on heading columns table attribute change.\n *\n * Depending on changed attributes this converter will rename `<td` to `<th>` elements or vice versa depending of the cell column index.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastTableHeadingColumnsChange( options = {} ) {\n\tconst asWidget = !!options.asWidget;\n\n\treturn dispatcher => dispatcher.on( 'attribute:headingColumns:table', ( evt, data, conversionApi ) => {\n\t\tconst table = data.item;\n\n\t\tif ( !conversionApi.consumable.consume( data.item, evt.name ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableAttributes = {\n\t\t\theadingRows: table.getAttribute( 'headingRows' ) || 0,\n\t\t\theadingColumns: table.getAttribute( 'headingColumns' ) || 0\n\t\t};\n\n\t\tconst oldColumns = data.attributeOldValue;\n\t\tconst newColumns = data.attributeNewValue;\n\n\t\tconst lastColumnToCheck = ( oldColumns > newColumns ? oldColumns : newColumns ) - 1;\n\n\t\tfor ( const tableWalkerValue of new TableWalker( table ) ) {\n\t\t\t// Skip cells that were not in heading section before and after the change.\n\t\t\tif ( tableWalkerValue.column > lastColumnToCheck ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\trenameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget );\n\t\t}\n\t} );\n}\n\n/**\n * Conversion helper that acts on a removed row.\n *\n * @returns {Function} Conversion helper.\n */\nexport function downcastRemoveRow() {\n\treturn dispatcher => dispatcher.on( 'remove:tableRow', ( evt, data, conversionApi ) => {\n\t\t// Prevent default remove converter.\n\t\tevt.stop();\n\t\tconst viewWriter = conversionApi.writer;\n\t\tconst mapper = conversionApi.mapper;\n\n\t\tconst viewStart = mapper.toViewPosition( data.position ).getLastMatchingPosition( value => !value.item.is( 'tr' ) );\n\t\tconst viewItem = viewStart.nodeAfter;\n\t\tconst tableSection = viewItem.parent;\n\n\t\t// Remove associated <tr> from the view.\n\t\tconst removeRange = viewWriter.createRangeOn( viewItem );\n\t\tconst removed = viewWriter.remove( removeRange );\n\n\t\tfor ( const child of viewWriter.createRangeIn( removed ).getItems() ) {\n\t\t\tmapper.unbindViewElement( child );\n\t\t}\n\n\t\t// Check if table section has any children left - if not remove it from the view.\n\t\tif ( !tableSection.childCount ) {\n\t\t\t// No need to unbind anything as table section is not represented in the model.\n\t\t\tviewWriter.remove( viewWriter.createRangeOn( tableSection ) );\n\t\t}\n\t}, { priority: 'higher' } );\n}\n\n// Renames an existing table cell in the view to a given element name.\n//\n// **Note** This method will not do anything if a view table cell was not yet converted.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} desiredCellElementName\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Boolean} asWidget\nfunction renameViewTableCell( tableCell, desiredCellElementName, conversionApi, asWidget ) {\n\tconst viewWriter = conversionApi.writer;\n\tconst viewCell = conversionApi.mapper.toViewElement( tableCell );\n\n\t// View cell might be not yet converted - skip it as it will be properly created by cell converter later on.\n\tif ( !viewCell ) {\n\t\treturn;\n\t}\n\n\tlet renamedCell;\n\n\tif ( asWidget ) {\n\t\tconst editable = viewWriter.createEditableElement( desiredCellElementName, viewCell.getAttributes() );\n\t\trenamedCell = toWidgetEditable( editable, viewWriter );\n\n\t\tviewWriter.insert( viewWriter.createPositionAfter( viewCell ), renamedCell );\n\t\tviewWriter.move( viewWriter.createRangeIn( viewCell ), viewWriter.createPositionAt( renamedCell, 0 ) );\n\t\tviewWriter.remove( viewWriter.createRangeOn( viewCell ) );\n\t} else {\n\t\trenamedCell = viewWriter.rename( desiredCellElementName, viewCell );\n\t}\n\n\tconversionApi.mapper.unbindViewElement( viewCell );\n\tconversionApi.mapper.bindElements( tableCell, renamedCell );\n}\n\n// Renames a table cell element in the view according to its location in the table.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {{headingColumns, headingRows}} tableAttributes\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Boolean} asWidget\nfunction renameViewTableCellIfRequired( tableWalkerValue, tableAttributes, conversionApi, asWidget ) {\n\tconst { cell } = tableWalkerValue;\n\n\t// Check whether current columnIndex is overlapped by table cells from previous rows.\n\tconst desiredCellElementName = getCellElementName( tableWalkerValue, tableAttributes );\n\n\tconst viewCell = conversionApi.mapper.toViewElement( cell );\n\n\t// If in single change we're converting attribute changes and inserting cell the table cell might not be inserted into view\n\t// because of child conversion is done after parent.\n\tif ( viewCell && viewCell.name !== desiredCellElementName ) {\n\t\trenameViewTableCell( cell, desiredCellElementName, conversionApi, asWidget );\n\t}\n}\n\n// Creates a table cell element in the view.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {module:engine/view/position~Position} insertPosition\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction createViewTableCellElement( tableWalkerValue, tableAttributes, insertPosition, conversionApi, options ) {\n\tconst asWidget = options && options.asWidget;\n\tconst cellElementName = getCellElementName( tableWalkerValue, tableAttributes );\n\n\tconst cellElement = asWidget ?\n\t\ttoWidgetEditable( conversionApi.writer.createEditableElement( cellElementName ), conversionApi.writer ) :\n\t\tconversionApi.writer.createContainerElement( cellElementName );\n\n\tconst tableCell = tableWalkerValue.cell;\n\n\tconst firstChild = tableCell.getChild( 0 );\n\tconst isSingleParagraph = tableCell.childCount === 1 && firstChild.name === 'paragraph';\n\n\tconversionApi.writer.insert( insertPosition, cellElement );\n\n\tif ( isSingleParagraph && !hasAnyAttribute( firstChild ) ) {\n\t\tconst innerParagraph = tableCell.getChild( 0 );\n\t\tconst paragraphInsertPosition = conversionApi.writer.createPositionAt( cellElement, 'end' );\n\n\t\tconversionApi.consumable.consume( innerParagraph, 'insert' );\n\n\t\tif ( options.asWidget ) {\n\t\t\tconst fakeParagraph = conversionApi.writer.createContainerElement( 'span' );\n\n\t\t\tconversionApi.mapper.bindElements( innerParagraph, fakeParagraph );\n\t\t\tconversionApi.writer.insert( paragraphInsertPosition, fakeParagraph );\n\n\t\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t\t} else {\n\t\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t\t\tconversionApi.mapper.bindElements( innerParagraph, cellElement );\n\t\t}\n\t} else {\n\t\tconversionApi.mapper.bindElements( tableCell, cellElement );\n\t}\n}\n\n// Creates `<tr>` view element.\n//\n// @param {module:engine/view/element~Element} tableRow\n// @param {Number} rowIndex\n// @param {module:engine/view/element~Element} tableSection\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @returns {module:engine/view/element~Element}\nfunction createTr( tableRow, rowIndex, tableSection, conversionApi ) {\n\t// Will always consume since we're converting <tableRow> element from a parent <table>.\n\tconversionApi.consumable.consume( tableRow, 'insert' );\n\n\tconst trElement = conversionApi.writer.createContainerElement( 'tr' );\n\tconversionApi.mapper.bindElements( tableRow, trElement );\n\n\tconst headingRows = tableRow.parent.getAttribute( 'headingRows' ) || 0;\n\tconst offset = headingRows > 0 && rowIndex >= headingRows ? rowIndex - headingRows : rowIndex;\n\n\tconst position = conversionApi.writer.createPositionAt( tableSection, offset );\n\tconversionApi.writer.insert( position, trElement );\n\n\treturn trElement;\n}\n\n// Returns `th` for heading cells and `td` for other cells for the current table walker value.\n//\n// @param {module:table/tablewalker~TableWalkerValue} tableWalkerValue\n// @param {{headingColumns, headingRows}} tableAttributes\n// @returns {String}\nfunction getCellElementName( tableWalkerValue, tableAttributes ) {\n\tconst { row, column } = tableWalkerValue;\n\tconst { headingColumns, headingRows } = tableAttributes;\n\n\t// Column heading are all tableCells in the first `columnHeading` rows.\n\tconst isColumnHeading = headingRows && headingRows > row;\n\n\t// So a whole row gets <th> element.\n\tif ( isColumnHeading ) {\n\t\treturn 'th';\n\t}\n\n\t// Row heading are tableCells which columnIndex is lower then headingColumns.\n\tconst isRowHeading = headingColumns && headingColumns > column;\n\n\treturn isRowHeading ? 'th' : 'td';\n}\n\n// Returns the table section name for the current table walker value.\n//\n// @param {Number} row\n// @param {{headingColumns, headingRows}} tableAttributes\n// @returns {String}\nfunction getSectionName( row, tableAttributes ) {\n\treturn row < tableAttributes.headingRows ? 'thead' : 'tbody';\n}\n\n// Creates or returns an existing `<tbody>` or `<thead>` element witch caching.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} viewTable\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Object} cachedTableSection An object that stores cached elements.\n// @returns {module:engine/view/containerelement~ContainerElement}\nfunction getOrCreateTableSection( sectionName, viewTable, conversionApi ) {\n\tconst viewTableSection = getExistingTableSectionElement( sectionName, viewTable );\n\n\treturn viewTableSection ? viewTableSection : createTableSection( sectionName, viewTable, conversionApi );\n}\n\n// Finds an existing `<tbody>` or `<thead>` element or returns undefined.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction getExistingTableSectionElement( sectionName, tableElement ) {\n\tfor ( const tableSection of tableElement.getChildren() ) {\n\t\tif ( tableSection.name == sectionName ) {\n\t\t\treturn tableSection;\n\t\t}\n\t}\n}\n\n// Creates a table section at the end of the table.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @returns {module:engine/view/containerelement~ContainerElement}\nfunction createTableSection( sectionName, tableElement, conversionApi ) {\n\tconst tableChildElement = conversionApi.writer.createContainerElement( sectionName );\n\n\tconst insertPosition = conversionApi.writer.createPositionAt( tableElement, sectionName == 'tbody' ? 'end' : 0 );\n\n\tconversionApi.writer.insert( insertPosition, tableChildElement );\n\n\treturn tableChildElement;\n}\n\n// Removes an existing `<tbody>` or `<thead>` element if it is empty.\n//\n// @param {String} sectionName\n// @param {module:engine/view/element~Element} tableElement\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\nfunction removeTableSectionIfEmpty( sectionName, tableElement, conversionApi ) {\n\tconst tableSection = getExistingTableSectionElement( sectionName, tableElement );\n\n\tif ( tableSection && tableSection.childCount === 0 ) {\n\t\tconversionApi.writer.remove( conversionApi.writer.createRangeOn( tableSection ) );\n\t}\n}\n\n// Moves view table rows associated with passed model rows to the provided table section element.\n//\n// **Note** This method will skip not converted table rows.\n//\n// @param {Array.<module:engine/model/element~Element>} rowsToMove\n// @param {module:engine/view/element~Element} viewTableSection\n// @param {module:engine/conversion/downcastdispatcher~DowncastConversionApi} conversionApi\n// @param {Number|'end'|'before'|'after'} offset Offset or one of the flags.\nfunction moveViewRowsToTableSection( rowsToMove, viewTableSection, conversionApi, offset ) {\n\tfor ( const tableRow of rowsToMove ) {\n\t\tconst viewTableRow = conversionApi.mapper.toViewElement( tableRow );\n\n\t\t// View table row might be not yet converted - skip it as it will be properly created by cell converter later on.\n\t\tif ( viewTableRow ) {\n\t\t\tconversionApi.writer.move(\n\t\t\t\tconversionApi.writer.createRangeOn( viewTableRow ),\n\t\t\t\tconversionApi.writer.createPositionAt( viewTableSection, offset )\n\t\t\t);\n\t\t}\n\t}\n}\n\n// Properly finds '<table>' element inside `<figure>` widget.\n//\n// @param {module:engine/view/element~Element} viewFigure\nfunction getViewTable( viewFigure ) {\n\tfor ( const child of viewFigure.getChildren() ) {\n\t\tif ( child.name === 'table' ) {\n\t\t\treturn child;\n\t\t}\n\t}\n}\n\n// Checks if element has any attribute set.\n//\n// @param {module:engine/model/element~Element element\n// @returns {Boolean}\nfunction hasAnyAttribute( element ) {\n\treturn !![ ...element.getAttributeKeys() ].length;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/inserttablecommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findOptimalInsertionPosition } from '@ckeditor/ckeditor5-widget/src/utils';\n\n/**\n * The insert table command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTable'` editor command.\n *\n * To insert a table at the current selection, execute the command and specify the dimensions:\n *\n *\t\teditor.execute( 'insertTable', { rows: 20, columns: 5 } );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertTableCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst schema = model.schema;\n\n\t\tconst validParent = getInsertTableParent( selection.getFirstPosition() );\n\n\t\tthis.isEnabled = schema.checkChild( validParent, 'table' );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Inserts a table with the given number of rows and columns into the editor.\n\t *\n\t * @param {Object} options\n\t * @param {Number} [options.rows=2] The number of rows to create in the inserted table.\n\t * @param {Number} [options.columns=2] The number of columns to create in the inserted table.\n\t * @fires execute\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst rows = parseInt( options.rows ) || 2;\n\t\tconst columns = parseInt( options.columns ) || 2;\n\n\t\tconst insertPosition = findOptimalInsertionPosition( selection, model );\n\n\t\tmodel.change( writer => {\n\t\t\tconst table = tableUtils.createTable( writer, rows, columns );\n\n\t\t\tmodel.insertContent( table, insertPosition );\n\n\t\t\twriter.setSelection( writer.createPositionAt( table.getNodeByPath( [ 0, 0, 0 ] ), 0 ) );\n\t\t} );\n\t}\n}\n\n// Returns valid parent to insert table\n//\n// @param {module:engine/model/position} position\nfunction getInsertTableParent( position ) {\n\tconst parent = position.parent;\n\n\treturn parent === parent.root ? parent : parent.parent;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/insertrowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The insert row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTableRowBelow'` and\n * `'insertTableRowAbove'` editor commands.\n *\n * To insert a row below the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableRowBelow' );\n *\n * To insert a row above the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableRowAbove' );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertRowCommand extends Command {\n\t/**\n\t * Creates a new `InsertRowCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} [options.order=\"below\"] The order of insertion relative to the row in which the caret is located.\n\t * Possible values: `\"above\"` and `\"below\"`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The order of insertion relative to the row in which the caret is located.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:table/commands/insertrowcommand~InsertRowCommand#order\n\t\t */\n\t\tthis.order = options.order || 'below';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst tableParent = findAncestor( 'table', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableParent;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #order} value, it inserts a row `'below'` or `'above'` the row in which selection is set.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst tableCell = findAncestor( 'tableCell', selection.getFirstPosition() );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst row = table.getChildIndex( tableRow );\n\t\tconst insertAt = this.order === 'below' ? row + 1 : row;\n\n\t\ttableUtils.insertRows( table, { rows: 1, at: insertAt } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/insertcolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The insert column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'insertTableColumnLeft'` and\n * `'insertTableColumnRight'` editor commands.\n *\n * To insert a column to the left of the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableColumnLeft' );\n *\n * To insert a column to the right of the selected cell, execute the following command:\n *\n *\t\teditor.execute( 'insertTableColumnRight' );\n *\n * @extends module:core/command~Command\n */\nexport default class InsertColumnCommand extends Command {\n\t/**\n\t * Creates a new `InsertColumnCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor An editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} [options.order=\"right\"] The order of insertion relative to the column in which the caret is located.\n\t * Possible values: `\"left\"` and `\"right\"`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The order of insertion relative to the column in which the caret is located.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} module:table/commands/insertcolumncommand~InsertColumnCommand#order\n\t\t */\n\t\tthis.order = options.order || 'right';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst selection = this.editor.model.document.selection;\n\n\t\tconst tableParent = findAncestor( 'table', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableParent;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #order} value, it inserts a column to the `'left'` or `'right'` of the column\n\t * in which the selection is set.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst table = tableCell.parent.parent;\n\n\t\tconst { column } = tableUtils.getCellLocation( tableCell );\n\t\tconst insertAt = this.order === 'right' ? column + 1 : column;\n\n\t\ttableUtils.insertColumns( table, { columns: 1, at: insertAt } );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/splitcellcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport { findAncestor } from './utils';\n\n/**\n * The split cell command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'splitTableCellVertically'`\n * and `'splitTableCellHorizontally'` editor commands.\n *\n * You can split any cell vertically or horizontally by executing this command. For example, to split the selected table cell vertically:\n *\n *\t\teditor.execute( 'splitTableCellVertically' );\n *\n * @extends module:core/command~Command\n */\nexport default class SplitCellCommand extends Command {\n\t/**\n\t * Creates a new `SplitCellCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} options.direction Indicates whether the command should split cells `'horizontally'` or `'vertically'`.\n\t */\n\tconstructor( editor, options = {} ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The direction that indicates which cell will be split.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #direction\n\t\t */\n\t\tthis.direction = options.direction || 'horizontally';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst document = model.document;\n\t\tconst selection = document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\n\t\tconst isHorizontally = this.direction === 'horizontally';\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tif ( isHorizontally ) {\n\t\t\ttableUtils.splitCellHorizontally( tableCell, 2 );\n\t\t} else {\n\t\t\ttableUtils.splitCellVertically( tableCell, 2 );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/mergecellcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The merge cell command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'mergeTableCellRight'`, `'mergeTableCellLeft'`,\n * `'mergeTableCellUp'` and `'mergeTableCellDown'` editor commands.\n *\n * To merge a table cell at the current selection with another cell, execute the command corresponding with the preferred direction.\n *\n * For example, to merge with a cell to the right:\n *\n *\t\teditor.execute( 'mergeTableCellRight' );\n *\n * **Note**: If a table cell has a different [`rowspan`](https://www.w3.org/TR/html50/tabular-data.html#attr-tdth-rowspan)\n * (for `'mergeTableCellRight'` and `'mergeTableCellLeft'`) or [`colspan`](https://www.w3.org/TR/html50/tabular-data.html#attr-tdth-colspan)\n * (for `'mergeTableCellUp'` and `'mergeTableCellDown'`), the command will be disabled.\n *\n * @extends module:core/command~Command\n */\nexport default class MergeCellCommand extends Command {\n\t/**\n\t * Creates a new `MergeCellCommand` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor The editor on which this command will be used.\n\t * @param {Object} options\n\t * @param {String} options.direction Indicates which cell to merge with the currently selected one.\n\t * Possible values are: `'left'`, `'right'`, `'up'` and `'down'`.\n\t */\n\tconstructor( editor, options ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The direction that indicates which cell will be merged with the currently selected one.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String} #direction\n\t\t */\n\t\tthis.direction = options.direction;\n\n\t\t/**\n\t\t * Whether the merge is horizontal (left/right) or vertical (up/down).\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean} #isHorizontal\n\t\t */\n\t\tthis.isHorizontal = this.direction == 'right' || this.direction == 'left';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst cellToMerge = this._getMergeableCell();\n\n\t\tthis.value = cellToMerge;\n\t\tthis.isEnabled = !!cellToMerge;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * Depending on the command's {@link #direction} value, it will merge the cell that is to the `'left'`, `'right'`, `'up'` or `'down'`.\n\t *\n\t * @fires execute\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\t\tconst cellToMerge = this.value;\n\t\tconst direction = this.direction;\n\n\t\tmodel.change( writer => {\n\t\t\tconst isMergeNext = direction == 'right' || direction == 'down';\n\n\t\t\t// The merge mechanism is always the same so sort cells to be merged.\n\t\t\tconst cellToExpand = isMergeNext ? tableCell : cellToMerge;\n\t\t\tconst cellToRemove = isMergeNext ? cellToMerge : tableCell;\n\n\t\t\t// Cache the parent of cell to remove for later check.\n\t\t\tconst removedTableCellRow = cellToRemove.parent;\n\n\t\t\tmergeTableCells( cellToRemove, cellToExpand, writer );\n\n\t\t\tconst spanAttribute = this.isHorizontal ? 'colspan' : 'rowspan';\n\t\t\tconst cellSpan = parseInt( tableCell.getAttribute( spanAttribute ) || 1 );\n\t\t\tconst cellToMergeSpan = parseInt( cellToMerge.getAttribute( spanAttribute ) || 1 );\n\n\t\t\t// Update table cell span attribute and merge set selection on merged contents.\n\t\t\twriter.setAttribute( spanAttribute, cellSpan + cellToMergeSpan, cellToExpand );\n\t\t\twriter.setSelection( writer.createRangeIn( cellToExpand ) );\n\n\t\t\t// Remove empty row after merging.\n\t\t\tif ( !removedTableCellRow.childCount ) {\n\t\t\t\tremoveEmptyRow( removedTableCellRow, writer );\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns a cell that can be merged with the current cell depending on the command's direction.\n\t *\n\t * @returns {module:engine/model/element~Element|undefined}\n\t * @private\n\t */\n\t_getMergeableCell() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tif ( !tableCell ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\t// First get the cell on proper direction.\n\t\tconst cellToMerge = this.isHorizontal ?\n\t\t\tgetHorizontalCell( tableCell, this.direction, tableUtils ) :\n\t\t\tgetVerticalCell( tableCell, this.direction );\n\n\t\tif ( !cellToMerge ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If found check if the span perpendicular to merge direction is equal on both cells.\n\t\tconst spanAttribute = this.isHorizontal ? 'rowspan' : 'colspan';\n\t\tconst span = parseInt( tableCell.getAttribute( spanAttribute ) || 1 );\n\n\t\tconst cellToMergeSpan = parseInt( cellToMerge.getAttribute( spanAttribute ) || 1 );\n\n\t\tif ( cellToMergeSpan === span ) {\n\t\t\treturn cellToMerge;\n\t\t}\n\t}\n}\n\n// Returns the cell that can be merged horizontally.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} direction\n// @returns {module:engine/model/node~Node|null}\nfunction getHorizontalCell( tableCell, direction, tableUtils ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\tconst horizontalCell = direction == 'right' ? tableCell.nextSibling : tableCell.previousSibling;\n\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\n\tif ( !horizontalCell ) {\n\t\treturn;\n\t}\n\n\t// Sort cells:\n\tconst cellOnLeft = direction == 'right' ? tableCell : horizontalCell;\n\tconst cellOnRight = direction == 'right' ? horizontalCell : tableCell;\n\n\t// Get their column indexes:\n\tconst { column: leftCellColumn } = tableUtils.getCellLocation( cellOnLeft );\n\tconst { column: rightCellColumn } = tableUtils.getCellLocation( cellOnRight );\n\n\tconst leftCellSpan = parseInt( cellOnLeft.getAttribute( 'colspan' ) || 1 );\n\tconst rightCellSpan = parseInt( cellOnRight.getAttribute( 'colspan' ) || 1 );\n\n\t// We cannot merge cells if the result will extend over heading section.\n\tconst isMergeWithBodyCell = direction == 'right' && ( rightCellColumn + rightCellSpan > headingColumns );\n\tconst isMergeWithHeadCell = direction == 'left' && ( leftCellColumn + leftCellSpan > headingColumns - 1 );\n\n\tif ( headingColumns && ( isMergeWithBodyCell || isMergeWithHeadCell ) ) {\n\t\treturn;\n\t}\n\n\t// The cell on the right must have index that is distant to the cell on the left by the left cell's width (colspan).\n\tconst cellsAreTouching = leftCellColumn + leftCellSpan === rightCellColumn;\n\n\t// If the right cell's column index is different it means that there are rowspanned cells between them.\n\treturn cellsAreTouching ? horizontalCell : undefined;\n}\n\n// Returns the cell that can be merged vertically.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {String} direction\n// @returns {module:engine/model/node~Node|null}\nfunction getVerticalCell( tableCell, direction ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\n\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t// Don't search for mergeable cell if direction points out of the table.\n\tif ( ( direction == 'down' && rowIndex === table.childCount - 1 ) || ( direction == 'up' && rowIndex === 0 ) ) {\n\t\treturn;\n\t}\n\n\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\tconst isMergeWithBodyCell = direction == 'down' && ( rowIndex + rowspan ) === headingRows;\n\tconst isMergeWithHeadCell = direction == 'up' && rowIndex === headingRows;\n\n\t// Don't search for mergeable cell if direction points out of the current table section.\n\tif ( headingRows && ( isMergeWithBodyCell || isMergeWithHeadCell ) ) {\n\t\treturn;\n\t}\n\n\tconst currentCellRowSpan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\tconst rowOfCellToMerge = direction == 'down' ? rowIndex + currentCellRowSpan : rowIndex;\n\n\tconst tableMap = [ ...new TableWalker( table, { endRow: rowOfCellToMerge } ) ];\n\n\tconst currentCellData = tableMap.find( value => value.cell === tableCell );\n\tconst mergeColumn = currentCellData.column;\n\n\tconst cellToMergeData = tableMap.find( ( { row, rowspan, column } ) => {\n\t\tif ( column !== mergeColumn ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( direction == 'down' ) {\n\t\t\t// If merging a cell below the mergeRow is already calculated.\n\t\t\treturn row === rowOfCellToMerge;\n\t\t} else {\n\t\t\t// If merging a cell above calculate if it spans to mergeRow.\n\t\t\treturn rowOfCellToMerge === row + rowspan;\n\t\t}\n\t} );\n\n\treturn cellToMergeData && cellToMergeData.cell;\n}\n\n// Properly removes empty row from a table. Will update `rowspan` attribute of cells that overlaps removed row.\n//\n// @param {module:engine/model/element~Element} removedTableCellRow\n// @param {module:engine/model/writer~Writer} writer\nfunction removeEmptyRow( removedTableCellRow, writer ) {\n\tconst table = removedTableCellRow.parent;\n\n\tconst removedRowIndex = table.getChildIndex( removedTableCellRow );\n\n\tfor ( const { cell, row, rowspan } of new TableWalker( table, { endRow: removedRowIndex } ) ) {\n\t\tconst overlapsRemovedRow = row + rowspan - 1 >= removedRowIndex;\n\n\t\tif ( overlapsRemovedRow ) {\n\t\t\tupdateNumericAttribute( 'rowspan', rowspan - 1, cell, writer );\n\t\t}\n\t}\n\n\twriter.remove( removedTableCellRow );\n}\n\n// Merges two table cells - will ensure that after merging cells with empty paragraph the result table cell will only have one paragraph.\n// If one of the merged table cell is empty the merged table cell will have contents of the non-empty table cell.\n// If both are empty the merged table cell will have only one empty paragraph.\n//\n// @param {module:engine/model/element~Element} cellToRemove\n// @param {module:engine/model/element~Element} cellToExpand\n// @param {module:engine/model/writer~Writer} writer\nfunction mergeTableCells( cellToRemove, cellToExpand, writer ) {\n\tif ( !isEmpty( cellToRemove ) ) {\n\t\tif ( isEmpty( cellToExpand ) ) {\n\t\t\twriter.remove( writer.createRangeIn( cellToExpand ) );\n\t\t}\n\n\t\twriter.move( writer.createRangeIn( cellToRemove ), writer.createPositionAt( cellToExpand, 'end' ) );\n\t}\n\n\t// Remove merged table cell.\n\twriter.remove( cellToRemove );\n}\n\n// Checks if passed table cell contains empty paragraph.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @returns {Boolean}\nfunction isEmpty( tableCell ) {\n\treturn tableCell.childCount == 1 && tableCell.getChild( 0 ).is( 'paragraph' ) && tableCell.getChild( 0 ).isEmpty;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/removerowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The remove row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'removeTableRow'` editor command.\n *\n * To remove the row containing the selected cell, execute the command:\n *\n *\t\teditor.execute( 'removeTableRow' );\n *\n * @extends module:core/command~Command\n */\nexport default class RemoveRowCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\n\t\tconst tableCell = findAncestor( 'tableCell', doc.selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell && tableCell.parent.parent.childCount > 1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst currentRow = table.getChildIndex( tableRow );\n\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( headingRows && currentRow <= headingRows ) {\n\t\t\t\tupdateNumericAttribute( 'headingRows', headingRows - 1, table, writer, 0 );\n\t\t\t}\n\n\t\t\tconst tableMap = [ ...new TableWalker( table, { endRow: currentRow } ) ];\n\n\t\t\tconst cellsToMove = new Map();\n\n\t\t\t// Get cells from removed row that are spanned over multiple rows.\n\t\t\ttableMap\n\t\t\t\t.filter( ( { row, rowspan } ) => row === currentRow && rowspan > 1 )\n\t\t\t\t.forEach( ( { column, cell, rowspan } ) => cellsToMove.set( column, { cell, rowspanToSet: rowspan - 1 } ) );\n\n\t\t\t// Reduce rowspan on cells that are above removed row and overlaps removed row.\n\t\t\ttableMap\n\t\t\t\t.filter( ( { row, rowspan } ) => row <= currentRow - 1 && row + rowspan > currentRow )\n\t\t\t\t.forEach( ( { cell, rowspan } ) => updateNumericAttribute( 'rowspan', rowspan - 1, cell, writer ) );\n\n\t\t\t// Move cells to another row.\n\t\t\tconst targetRow = currentRow + 1;\n\t\t\tconst tableWalker = new TableWalker( table, { includeSpanned: true, startRow: targetRow, endRow: targetRow } );\n\n\t\t\tlet previousCell;\n\n\t\t\tfor ( const { row, column, cell } of [ ...tableWalker ] ) {\n\t\t\t\tif ( cellsToMove.has( column ) ) {\n\t\t\t\t\tconst { cell: cellToMove, rowspanToSet } = cellsToMove.get( column );\n\t\t\t\t\tconst targetPosition = previousCell ?\n\t\t\t\t\t\twriter.createPositionAfter( previousCell ) :\n\t\t\t\t\t\twriter.createPositionAt( table.getChild( row ), 0 );\n\n\t\t\t\t\twriter.move( writer.createRangeOn( cellToMove ), targetPosition );\n\t\t\t\t\tupdateNumericAttribute( 'rowspan', rowspanToSet, cellToMove, writer );\n\n\t\t\t\t\tpreviousCell = cellToMove;\n\t\t\t\t} else {\n\t\t\t\t\tpreviousCell = cell;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\twriter.remove( tableRow );\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/removecolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport TableWalker from '../tablewalker';\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The remove column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'removeTableColumn'` editor command.\n *\n * To remove the column containing the selected cell, execute the command:\n *\n *\t\teditor.execute( 'removeTableColumn' );\n *\n * @extends module:core/command~Command\n */\nexport default class RemoveColumnCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\t\tconst tableUtils = editor.plugins.get( 'TableUtils' );\n\n\t\tconst tableCell = findAncestor( 'tableCell', selection.getFirstPosition() );\n\n\t\tthis.isEnabled = !!tableCell && tableUtils.getColumns( tableCell.parent.parent ) > 1;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute() {\n\t\tconst model = this.editor.model;\n\t\tconst selection = model.document.selection;\n\n\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\t\tconst row = table.getChildIndex( tableRow );\n\n\t\t// Cache the table before removing or updating colspans.\n\t\tconst tableMap = [ ...new TableWalker( table ) ];\n\n\t\t// Get column index of removed column.\n\t\tconst cellData = tableMap.find( value => value.cell === tableCell );\n\t\tconst removedColumn = cellData.column;\n\n\t\tmodel.change( writer => {\n\t\t\t// Update heading columns attribute if removing a row from head section.\n\t\t\tif ( headingColumns && row <= headingColumns ) {\n\t\t\t\twriter.setAttribute( 'headingColumns', headingColumns - 1, table );\n\t\t\t}\n\n\t\t\tfor ( const { cell, column, colspan } of tableMap ) {\n\t\t\t\t// If colspaned cell overlaps removed column decrease it's span.\n\t\t\t\tif ( column <= removedColumn && colspan > 1 && column + colspan > removedColumn ) {\n\t\t\t\t\tupdateNumericAttribute( 'colspan', colspan - 1, cell, writer );\n\t\t\t\t} else if ( column === removedColumn ) {\n\t\t\t\t\t// The cell in removed column has colspan of 1.\n\t\t\t\t\twriter.remove( cell );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/setheaderrowcommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport { createEmptyTableCell, findAncestor, updateNumericAttribute } from './utils';\nimport TableWalker from '../tablewalker';\n\n/**\n * The header row command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'setTableColumnHeader'` editor command.\n *\n * You can make the row containing the selected cell a [header](https://www.w3.org/TR/html50/tabular-data.html#the-th-element) by executing:\n *\n *\t\teditor.execute( 'setTableRowHeader' );\n *\n * **Note:** All preceding rows will also become headers. If the current row is already a header, executing this command\n * will make it a regular row back again (including the following rows).\n *\n * @extends module:core/command~Command\n */\nexport default class SetHeaderRowCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst isInTable = !!tableCell;\n\n\t\tthis.isEnabled = isInTable;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection} is in a header row.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t\tthis.value = isInTable && this._isInHeading( tableCell, tableCell.parent.parent );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is in a non-header row, the command will set the `headingRows` table attribute to cover that row.\n\t *\n\t * When the selection is already in a header row, it will set `headingRows` so the heading section will end before that row.\n\t *\n\t * @fires execute\n\t * @param {Object} options\n\t * @param {Boolean} [options.forceValue] If set, the command will set (`true`) or unset (`false`) header rows according to `forceValue`\n\t * parameter instead of the current model state.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst currentHeadingRows = table.getAttribute( 'headingRows' ) || 0;\n\t\tconst selectionRow = tableRow.index;\n\n\t\tif ( options.forceValue === this.value ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst headingRowsToSet = this.value ? selectionRow : selectionRow + 1;\n\n\t\tmodel.change( writer => {\n\t\t\tif ( headingRowsToSet ) {\n\t\t\t\t// Changing heading rows requires to check if any of a heading cell is overlapping vertically the table head.\n\t\t\t\t// Any table cell that has a rowspan attribute > 1 will not exceed the table head so we need to fix it in rows below.\n\t\t\t\tconst cellsToSplit = getOverlappingCells( table, headingRowsToSet, currentHeadingRows );\n\n\t\t\t\tfor ( const cell of cellsToSplit ) {\n\t\t\t\t\tsplitHorizontally( cell, headingRowsToSet, writer );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tupdateNumericAttribute( 'headingRows', headingRowsToSet, table, writer, 0 );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if a table cell is in the heading section.\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {module:engine/model/element~Element} table\n\t * @returns {Boolean}\n\t * @private\n\t */\n\t_isInHeading( tableCell, table ) {\n\t\tconst headingRows = parseInt( table.getAttribute( 'headingRows' ) || 0 );\n\n\t\treturn !!headingRows && tableCell.parent.index < headingRows;\n\t}\n}\n\n// Returns cells that span beyond the new heading section.\n//\n// @param {module:engine/model/element~Element} table The table to check.\n// @param {Number} headingRowsToSet New heading rows attribute.\n// @param {Number} currentHeadingRows Current heading rows attribute.\n// @returns {Array.<module:engine/model/element~Element>}\nfunction getOverlappingCells( table, headingRowsToSet, currentHeadingRows ) {\n\tconst cellsToSplit = [];\n\n\tconst startAnalysisRow = headingRowsToSet > currentHeadingRows ? currentHeadingRows : 0;\n\t// We're analyzing only when headingRowsToSet > 0.\n\tconst endAnalysisRow = headingRowsToSet - 1;\n\n\tconst tableWalker = new TableWalker( table, { startRow: startAnalysisRow, endRow: endAnalysisRow } );\n\n\tfor ( const { row, rowspan, cell } of tableWalker ) {\n\t\tif ( rowspan > 1 && row + rowspan > headingRowsToSet ) {\n\t\t\tcellsToSplit.push( cell );\n\t\t}\n\t}\n\n\treturn cellsToSplit;\n}\n\n// Splits the table cell horizontally.\n//\n// @param {module:engine/model/element~Element} tableCell\n// @param {Number} headingRows\n// @param {module:engine/model/writer~Writer} writer\nfunction splitHorizontally( tableCell, headingRows, writer ) {\n\tconst tableRow = tableCell.parent;\n\tconst table = tableRow.parent;\n\tconst rowIndex = tableRow.index;\n\n\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) );\n\tconst newRowspan = headingRows - rowIndex;\n\n\tconst attributes = {};\n\n\tconst spanToSet = rowspan - newRowspan;\n\n\tif ( spanToSet > 1 ) {\n\t\tattributes.rowspan = spanToSet;\n\t}\n\n\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\tif ( colspan > 1 ) {\n\t\tattributes.colspan = colspan;\n\t}\n\n\tconst startRow = table.getChildIndex( tableRow );\n\tconst endRow = startRow + newRowspan;\n\tconst tableMap = [ ...new TableWalker( table, { startRow, endRow, includeSpanned: true } ) ];\n\n\tlet columnIndex;\n\n\tfor ( const { row, column, cell, cellIndex } of tableMap ) {\n\t\tif ( cell === tableCell && columnIndex === undefined ) {\n\t\t\tcolumnIndex = column;\n\t\t}\n\n\t\tif ( columnIndex !== undefined && columnIndex === column && row === endRow ) {\n\t\t\tconst tableRow = table.getChild( row );\n\t\t\tconst tableCellPosition = writer.createPositionAt( tableRow, cellIndex );\n\n\t\t\tcreateEmptyTableCell( writer, tableCellPosition, attributes );\n\t\t}\n\t}\n\n\t// Update the rowspan attribute after updating table.\n\tupdateNumericAttribute( 'rowspan', newRowspan, tableCell, writer );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/commands/setheadercolumncommand\n */\n\nimport Command from '@ckeditor/ckeditor5-core/src/command';\n\nimport { findAncestor, updateNumericAttribute } from './utils';\n\n/**\n * The header column command.\n *\n * The command is registered by {@link module:table/tableediting~TableEditing} as `'setTableColumnHeader'` editor command.\n *\n * You can make the column containing the selected cell a [header](https://www.w3.org/TR/html50/tabular-data.html#the-th-element)\n * by executing:\n *\n *\t\teditor.execute( 'setTableColumnHeader' );\n *\n * **Note:** All preceding columns will also become headers. If the current column is already a header, executing this command\n * will make it a regular column back again (including the following columns).\n *\n * @extends module:core/command~Command\n */\nexport default class SetHeaderColumnCommand extends Command {\n\t/**\n\t * @inheritDoc\n\t */\n\trefresh() {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\n\t\tconst isInTable = !!tableCell;\n\n\t\tthis.isEnabled = isInTable;\n\n\t\t/**\n\t\t * Flag indicating whether the command is active. The command is active when the\n\t\t * {@link module:engine/model/selection~Selection} is in a header column.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #value\n\t\t */\n\t\tthis.value = isInTable && this._isInHeading( tableCell, tableCell.parent.parent );\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * When the selection is in a non-header column, the command will set the `headingColumns` table attribute to cover that column.\n\t *\n\t * When the selection is already in a header column, it will set `headingColumns` so the heading section will end before that column.\n\t *\n\t * @fires execute\n\t * @param {Object} [options]\n\t * @param {Boolean} [options.forceValue] If set, the command will set (`true`) or unset (`false`) header columns according to\n\t * `forceValue` parameter instead of the current model state.\n\t */\n\texecute( options = {} ) {\n\t\tconst model = this.editor.model;\n\t\tconst doc = model.document;\n\t\tconst selection = doc.selection;\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst position = selection.getFirstPosition();\n\t\tconst tableCell = findAncestor( 'tableCell', position );\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst { column: selectionColumn } = tableUtils.getCellLocation( tableCell );\n\n\t\tif ( options.forceValue === this.value ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst headingColumnsToSet = this.value ? selectionColumn : selectionColumn + 1;\n\n\t\tmodel.change( writer => {\n\t\t\tupdateNumericAttribute( 'headingColumns', headingColumnsToSet, table, writer, 0 );\n\t\t} );\n\t}\n\n\t/**\n\t * Checks if a table cell is in the heading section.\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {module:engine/model/element~Element} table\n\t * @returns {Boolean}\n\t * @private\n\t */\n\t_isInHeading( tableCell, table ) {\n\t\tconst headingColumns = parseInt( table.getAttribute( 'headingColumns' ) || 0 );\n\n\t\tconst tableUtils = this.editor.plugins.get( 'TableUtils' );\n\n\t\tconst { column } = tableUtils.getCellLocation( tableCell );\n\n\t\treturn !!headingColumns && column < headingColumns;\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tableutils\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport TableWalker from './tablewalker';\nimport { createEmptyTableCell, updateNumericAttribute } from './commands/utils';\n\n/**\n * The table utilities plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableUtils extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'TableUtils';\n\t}\n\n\t/**\n\t * Returns the table cell location as an object with table row and table column indexes.\n\t *\n\t * For instance in the table below:\n\t *\n\t *\t\t 0 1 2 3\n\t *\t\t +---+---+---+---+\n\t *\t\t0 | a | b | c |\n\t *\t\t + + +---+\n\t *\t\t1 | | | d |\n\t *\t\t +---+---+ +---+\n\t *\t\t2 | e | | f |\n\t *\t\t +---+---+---+---+\n\t *\n\t * the method will return:\n\t *\n\t *\t\tconst cellA = table.getNodeByPath( [ 0, 0 ] );\n\t *\t\teditor.plugins.get( 'TableUtils' ).getCellLocation( cellA );\n\t *\t\t// will return { row: 0, column: 0 }\n\t *\n\t *\t\tconst cellD = table.getNodeByPath( [ 1, 0 ] );\n\t *\t\teditor.plugins.get( 'TableUtils' ).getCellLocation( cellD );\n\t *\t\t// will return { row: 1, column: 3 }\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @returns {Object} Returns a `{row, column}` object.\n\t */\n\tgetCellLocation( tableCell ) {\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst rowIndex = table.getChildIndex( tableRow );\n\n\t\tconst tableWalker = new TableWalker( table, { startRow: rowIndex, endRow: rowIndex } );\n\n\t\tfor ( const { cell, row, column } of tableWalker ) {\n\t\t\tif ( cell === tableCell ) {\n\t\t\t\treturn { row, column };\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Creates an empty table with proper structure. The table needs to be inserted into the model,\n\t * ie. using {@link module:engine/model/model~Model#insertContent} function.\n\t *\n\t *\t\tmodel.change( ( writer ) => {\n\t *\t\t\t// Create a table of 2 rows and 7 columns:\n\t *\t\t\tconst table = tableUtils.createTable( writer, 2, 7);\n\t *\n\t *\t\t\t// Insert table to the model at the best position taking current selection:\n\t *\t\t\tmodel.insertContent( table );\n\t *\t\t}\n\t *\n\t * @param {module:engine/model/writer~Writer} writer The model writer.\n\t * @param {Number} rows The number of rows to create.\n\t * @param {Number} columns The number of columns to create.\n\t * @returns {module:engine/model/element~Element} The created table element.\n\t */\n\tcreateTable( writer, rows, columns ) {\n\t\tconst table = writer.createElement( 'table' );\n\n\t\tcreateEmptyRows( writer, table, 0, rows, columns );\n\n\t\treturn table;\n\t}\n\n\t/**\n\t * Inserts rows into a table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).insertRows( table, { at: 1, rows: 2 } );\n\t *\n\t * Assuming the table on the left, the above code will transform it to the table on the right:\n\t *\n\t *\t\trow index\n\t *\t\t 0 +---+---+---+ `at` = 1, +---+---+---+ 0\n\t *\t\t | a | b | c | `rows` = 2, | a | b | c |\n\t *\t\t 1 + +---+---+ <-- insert here + +---+---+ 1\n\t *\t\t | | d | e | | | | |\n\t *\t\t 2 + +---+---+ will give: + +---+---+ 2\n\t *\t\t | | f | g | | | | |\n\t *\t\t 3 +---+---+---+ + +---+---+ 3\n\t *\t\t | | d | e |\n\t *\t\t +---+---+---+ 4\n\t *\t\t + + f | g |\n\t *\t\t +---+---+---+ 5\n\t *\n\t * @param {module:engine/model/element~Element} table The table model element where the rows will be inserted.\n\t * @param {Object} options\n\t * @param {Number} [options.at=0] Row index at which the rows will be inserted.\n\t * @param {Number} [options.rows=1] The number of rows to insert.\n\t */\n\tinsertRows( table, options = {} ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst insertAt = options.at || 0;\n\t\tconst rowsToInsert = options.rows || 1;\n\n\t\tmodel.change( writer => {\n\t\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\t\t// Inserting rows inside heading section requires to update `headingRows` attribute as the heading section will grow.\n\t\t\tif ( headingRows > insertAt ) {\n\t\t\t\twriter.setAttribute( 'headingRows', headingRows + rowsToInsert, table );\n\t\t\t}\n\n\t\t\t// Inserting at the end and at the beginning of a table doesn't require to calculate anything special.\n\t\t\tif ( insertAt === 0 || insertAt === table.childCount ) {\n\t\t\t\tcreateEmptyRows( writer, table, insertAt, rowsToInsert, this.getColumns( table ) );\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Iterate over all rows above inserted rows in order to check for rowspanned cells.\n\t\t\tconst tableIterator = new TableWalker( table, { endRow: insertAt } );\n\n\t\t\t// Will hold number of cells needed to insert in created rows.\n\t\t\t// The number might be different then table cell width when there are rowspanned cells.\n\t\t\tlet cellsToInsert = 0;\n\n\t\t\tfor ( const { row, rowspan, colspan, cell } of tableIterator ) {\n\t\t\t\tconst isBeforeInsertedRow = row < insertAt;\n\t\t\t\tconst overlapsInsertedRow = row + rowspan > insertAt;\n\n\t\t\t\tif ( isBeforeInsertedRow && overlapsInsertedRow ) {\n\t\t\t\t\t// This cell overlaps inserted rows so we need to expand it further.\n\t\t\t\t\twriter.setAttribute( 'rowspan', rowspan + rowsToInsert, cell );\n\t\t\t\t}\n\n\t\t\t\t// Calculate how many cells to insert based on the width of cells in a row at insert position.\n\t\t\t\t// It might be lower then table width as some cells might overlaps inserted row.\n\t\t\t\t// In the table above the cell 'a' overlaps inserted row so only two empty cells are need to be created.\n\t\t\t\tif ( row === insertAt ) {\n\t\t\t\t\tcellsToInsert += colspan;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcreateEmptyRows( writer, table, insertAt, rowsToInsert, cellsToInsert );\n\t\t} );\n\t}\n\n\t/**\n\t * Inserts columns into a table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).insertColumns( table, { at: 1, columns: 2 } );\n\t *\n\t * Assuming the table on the left, the above code will transform it to the table on the right:\n\t *\n\t *\t\t0 1 2 3 0 1 2 3 4 5\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t| a | b | | a | b |\n\t *\t\t+ +---+ + +---+\n\t *\t\t| | c | | | c |\n\t *\t\t+---+---+---+ will give: +---+---+---+---+---+\n\t *\t\t| d | e | f | | d | | | e | f |\n\t *\t\t+---+ +---+ +---+---+---+ +---+\n\t *\t\t| g | | h | | g | | | | h |\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t| i | | i |\n\t *\t\t+---+---+---+ +---+---+---+---+---+\n\t *\t\t ^---- insert here, `at` = 1, `columns` = 2\n\t *\n\t * @param {module:engine/model/element~Element} table The table model element where the columns will be inserted.\n\t * @param {Object} options\n\t * @param {Number} [options.at=0] Column index at which the columns will be inserted.\n\t * @param {Number} [options.columns=1] The number of columns to insert.\n\t */\n\tinsertColumns( table, options = {} ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst insertAt = options.at || 0;\n\t\tconst columnsToInsert = options.columns || 1;\n\n\t\tmodel.change( writer => {\n\t\t\tconst headingColumns = table.getAttribute( 'headingColumns' );\n\n\t\t\t// Inserting columns inside heading section requires to update `headingColumns` attribute as the heading section will grow.\n\t\t\tif ( insertAt < headingColumns ) {\n\t\t\t\twriter.setAttribute( 'headingColumns', headingColumns + columnsToInsert, table );\n\t\t\t}\n\n\t\t\tconst tableColumns = this.getColumns( table );\n\n\t\t\t// Inserting at the end and at the beginning of a table doesn't require to calculate anything special.\n\t\t\tif ( insertAt === 0 || tableColumns === insertAt ) {\n\t\t\t\tfor ( const tableRow of table.getChildren() ) {\n\t\t\t\t\tcreateCells( columnsToInsert, writer, writer.createPositionAt( tableRow, insertAt ? 'end' : 0 ) );\n\t\t\t\t}\n\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst tableWalker = new TableWalker( table, { column: insertAt, includeSpanned: true } );\n\n\t\t\tfor ( const { row, cell, cellIndex } of tableWalker ) {\n\t\t\t\t// When iterating over column the table walker outputs either:\n\t\t\t\t// - cells at given column index (cell \"e\" from method docs),\n\t\t\t\t// - spanned columns (spanned cell from row between cells \"g\" and \"h\" - spanned by \"e\", only if `includeSpanned: true`),\n\t\t\t\t// - or a cell from the same row which spans over this column (cell \"a\").\n\n\t\t\t\tconst rowspan = parseInt( cell.getAttribute( 'rowspan' ) || 1 );\n\t\t\t\tconst colspan = parseInt( cell.getAttribute( 'colspan' ) || 1 );\n\n\t\t\t\tif ( cell.index !== insertAt && colspan > 1 ) {\n\t\t\t\t\t// If column is different than `insertAt`, it is a cell that spans over an inserted column (cell \"a\" & \"i\").\n\t\t\t\t\t// For such cells expand them by a number of columns inserted.\n\t\t\t\t\twriter.setAttribute( 'colspan', colspan + columnsToInsert, cell );\n\n\t\t\t\t\t// The `includeSpanned` option will output the \"empty\"/spanned column so skip this row already.\n\t\t\t\t\ttableWalker.skipRow( row );\n\n\t\t\t\t\t// This cell will overlap cells in rows below so skip them also (because of `includeSpanned` option) - (cell \"a\")\n\t\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\t\tfor ( let i = row + 1; i < row + rowspan; i++ ) {\n\t\t\t\t\t\t\ttableWalker.skipRow( i );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// It's either cell at this column index or spanned cell by a rowspanned cell from row above.\n\t\t\t\t\t// In table above it's cell \"e\" and a spanned position from row below (empty cell between cells \"g\" and \"h\")\n\t\t\t\t\tconst insertPosition = writer.createPositionAt( table.getChild( row ), cellIndex );\n\n\t\t\t\t\tcreateCells( columnsToInsert, writer, insertPosition );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Divides a table cell vertically into several ones.\n\t *\n\t * The cell will be visually split into more cells by updating colspans of other cells in a column\n\t * and inserting cells (columns) after that cell.\n\t *\n\t * In the table below, if cell \"a\" is split to 3 cells:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * it will result in the table below:\n\t *\n\t *\t\t+---+---+---+---+---+\n\t *\t\t| a | | | b | c |\n\t *\t\t+---+---+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+---+---+\n\t *\n\t * So cell \"d\" will get its `colspan` updated to `3` and 2 cells will be added (2 columns will be created).\n\t *\n\t * Splitting a cell that already has a `colspan` attribute set will distribute the cell `colspan` evenly and the remainder\n\t * will be left to the original cell:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a |\n\t *\t\t+---+---+---+\n\t *\t\t| b | c | d |\n\t *\t\t+---+---+---+\n\t *\n\t * Splitting cell \"a\" with `colspan=3` to 2 cells will create 1 cell with a `colspan=a` and cell \"a\" that will have `colspan=2`:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | |\n\t *\t\t+---+---+---+\n\t *\t\t| b | c | d |\n\t *\t\t+---+---+---+\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {Number} numberOfCells\n\t */\n\tsplitCellVertically( tableCell, numberOfCells = 2 ) {\n\t\tconst model = this.editor.model;\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\n\t\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\t\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\t\tmodel.change( writer => {\n\t\t\t// First check - the cell spans over multiple rows so before doing anything else just split this cell.\n\t\t\tif ( colspan > 1 ) {\n\t\t\t\t// Get spans of new (inserted) cells and span to update of split cell.\n\t\t\t\tconst { newCellsSpan, updatedSpan } = breakSpanEvenly( colspan, numberOfCells );\n\n\t\t\t\tupdateNumericAttribute( 'colspan', updatedSpan, tableCell, writer );\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\t\t\t\tif ( newCellsSpan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = newCellsSpan;\n\t\t\t\t}\n\n\t\t\t\t// Copy rowspan of split cell.\n\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = rowspan;\n\t\t\t\t}\n\n\t\t\t\tconst cellsToInsert = colspan > numberOfCells ? numberOfCells - 1 : colspan - 1;\n\t\t\t\tcreateCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );\n\t\t\t}\n\n\t\t\t// Second check - the cell has colspan of 1 or we need to create more cells then the currently one spans over.\n\t\t\tif ( colspan < numberOfCells ) {\n\t\t\t\tconst cellsToInsert = numberOfCells - colspan;\n\n\t\t\t\t// First step: expand cells on the same column as split cell.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table ) ];\n\n\t\t\t\t// Get the column index of split cell.\n\t\t\t\tconst { column: splitCellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );\n\n\t\t\t\t// Find cells which needs to be expanded vertically - those on the same column or those that spans over split cell's column.\n\t\t\t\tconst cellsToUpdate = tableMap.filter( ( { cell, colspan, column } ) => {\n\t\t\t\t\tconst isOnSameColumn = cell !== tableCell && column === splitCellColumn;\n\t\t\t\t\tconst spansOverColumn = ( column < splitCellColumn && column + colspan > splitCellColumn );\n\n\t\t\t\t\treturn isOnSameColumn || spansOverColumn;\n\t\t\t\t} );\n\n\t\t\t\t// Expand cells vertically.\n\t\t\t\tfor ( const { cell, colspan } of cellsToUpdate ) {\n\t\t\t\t\twriter.setAttribute( 'colspan', colspan + cellsToInsert, cell );\n\t\t\t\t}\n\n\t\t\t\t// Second step: create columns after split cell.\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\n\t\t\t\t// Copy rowspan of split cell.\n\t\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = rowspan;\n\t\t\t\t}\n\n\t\t\t\tcreateCells( cellsToInsert, writer, writer.createPositionAfter( tableCell ), newCellsAttributes );\n\n\t\t\t\tconst headingColumns = table.getAttribute( 'headingColumns' ) || 0;\n\n\t\t\t\t// Update heading section if split cell is in heading section.\n\t\t\t\tif ( headingColumns > splitCellColumn ) {\n\t\t\t\t\tupdateNumericAttribute( 'headingColumns', headingColumns + cellsToInsert, table, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Divides a table cell horizontally into several ones.\n\t *\n\t * The cell will be visually split into more cells by updating rowspans of other cells in the row and inserting rows with a single cell\n\t * below.\n\t *\n\t * If in the table below cell \"b\" is split to 3 cells:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * It will result in the table below:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+ +\n\t *\t\t| | | |\n\t *\t\t+ +---+ +\n\t *\t\t| | | |\n\t *\t\t+---+---+---+\n\t *\t\t| d | e | f |\n\t *\t\t+---+---+---+\n\t *\n\t * So cells \"a\" and \"b\" will get their `rowspan` updated to `3` and 2 rows with a single cell will be added.\n\t *\n\t * Splitting a cell that already has a `rowspan` attribute set will distribute the cell `rowspan` evenly and the remainder\n\t * will be left to the original cell:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+---+\n\t *\t\t| | d | e |\n\t *\t\t+ +---+---+\n\t *\t\t| | f | g |\n\t *\t\t+ +---+---+\n\t *\t\t| | h | i |\n\t *\t\t+---+---+---+\n\t *\n\t * Splitting cell \"a\" with `rowspan=4` to 3 cells will create 2 cells with a `rowspan=1` and cell \"a\" will have `rowspan=2`:\n\t *\n\t *\t\t+---+---+---+\n\t *\t\t| a | b | c |\n\t *\t\t+ +---+---+\n\t *\t\t| | d | e |\n\t *\t\t+---+---+---+\n\t *\t\t| | f | g |\n\t *\t\t+---+---+---+\n\t *\t\t| | h | i |\n\t *\t\t+---+---+---+\n\t *\n\t * @param {module:engine/model/element~Element} tableCell\n\t * @param {Number} numberOfCells\n\t */\n\tsplitCellHorizontally( tableCell, numberOfCells = 2 ) {\n\t\tconst model = this.editor.model;\n\n\t\tconst tableRow = tableCell.parent;\n\t\tconst table = tableRow.parent;\n\t\tconst splitCellRow = table.getChildIndex( tableRow );\n\n\t\tconst rowspan = parseInt( tableCell.getAttribute( 'rowspan' ) || 1 );\n\t\tconst colspan = parseInt( tableCell.getAttribute( 'colspan' ) || 1 );\n\n\t\tmodel.change( writer => {\n\t\t\t// First check - the cell spans over multiple rows so before doing anything else just split this cell.\n\t\t\tif ( rowspan > 1 ) {\n\t\t\t\t// Cache table map before updating table.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table, {\n\t\t\t\t\tstartRow: splitCellRow,\n\t\t\t\t\tendRow: splitCellRow + rowspan - 1,\n\t\t\t\t\tincludeSpanned: true\n\t\t\t\t} ) ];\n\n\t\t\t\t// Get spans of new (inserted) cells and span to update of split cell.\n\t\t\t\tconst { newCellsSpan, updatedSpan } = breakSpanEvenly( rowspan, numberOfCells );\n\n\t\t\t\tupdateNumericAttribute( 'rowspan', updatedSpan, tableCell, writer );\n\n\t\t\t\tconst { column: cellColumn } = tableMap.find( ( { cell } ) => cell === tableCell );\n\n\t\t\t\t// Each inserted cell will have the same attributes:\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Do not store default value in the model.\n\t\t\t\tif ( newCellsSpan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.rowspan = newCellsSpan;\n\t\t\t\t}\n\n\t\t\t\t// Copy colspan of split cell.\n\t\t\t\tif ( colspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = colspan;\n\t\t\t\t}\n\n\t\t\t\tfor ( const { column, row, cellIndex } of tableMap ) {\n\t\t\t\t\t// As both newly created cells and the split cell might have rowspan,\n\t\t\t\t\t// the insertion of new cells must go to appropriate rows:\n\t\t\t\t\t//\n\t\t\t\t\t// 1. It's a row after split cell + it's height.\n\t\t\t\t\tconst isAfterSplitCell = row >= splitCellRow + updatedSpan;\n\t\t\t\t\t// 2. Is on the same column.\n\t\t\t\t\tconst isOnSameColumn = column === cellColumn;\n\t\t\t\t\t// 3. And it's row index is after previous cell height.\n\t\t\t\t\tconst isInEvenlySplitRow = ( row + splitCellRow + updatedSpan ) % newCellsSpan === 0;\n\n\t\t\t\t\tif ( isAfterSplitCell && isOnSameColumn && isInEvenlySplitRow ) {\n\t\t\t\t\t\tconst position = writer.createPositionAt( table.getChild( row ), cellIndex );\n\n\t\t\t\t\t\tcreateCells( 1, writer, position, newCellsAttributes );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Second check - the cell has rowspan of 1 or we need to create more cells than the current cell spans over.\n\t\t\tif ( rowspan < numberOfCells ) {\n\t\t\t\t// We already split the cell in check one so here we split to the remaining number of cells only.\n\t\t\t\tconst cellsToInsert = numberOfCells - rowspan;\n\n\t\t\t\t// This check is needed since we need to check if there are any cells from previous rows than spans over this cell's row.\n\t\t\t\tconst tableMap = [ ...new TableWalker( table, { startRow: 0, endRow: splitCellRow } ) ];\n\n\t\t\t\t// First step: expand cells.\n\t\t\t\tfor ( const { cell, rowspan, row } of tableMap ) {\n\t\t\t\t\t// Expand rowspan of cells that are either:\n\t\t\t\t\t// - on the same row as current cell,\n\t\t\t\t\t// - or are below split cell row and overlaps that row.\n\t\t\t\t\tif ( cell !== tableCell && row + rowspan > splitCellRow ) {\n\t\t\t\t\t\tconst rowspanToSet = rowspan + cellsToInsert;\n\n\t\t\t\t\t\twriter.setAttribute( 'rowspan', rowspanToSet, cell );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Second step: create rows with single cell below split cell.\n\t\t\t\tconst newCellsAttributes = {};\n\n\t\t\t\t// Copy colspan of split cell.\n\t\t\t\tif ( colspan > 1 ) {\n\t\t\t\t\tnewCellsAttributes.colspan = colspan;\n\t\t\t\t}\n\n\t\t\t\tcreateEmptyRows( writer, table, splitCellRow + 1, cellsToInsert, 1, newCellsAttributes );\n\n\t\t\t\t// Update heading section if split cell is in heading section.\n\t\t\t\tconst headingRows = table.getAttribute( 'headingRows' ) || 0;\n\n\t\t\t\tif ( headingRows > splitCellRow ) {\n\t\t\t\t\tupdateNumericAttribute( 'headingRows', headingRows + cellsToInsert, table, writer );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t}\n\n\t/**\n\t * Returns the number of columns for a given table.\n\t *\n\t *\t\teditor.plugins.get( 'TableUtils' ).getColumns( table );\n\t *\n\t * @param {module:engine/model/element~Element} table The table to analyze.\n\t * @returns {Number}\n\t */\n\tgetColumns( table ) {\n\t\t// Analyze first row only as all the rows should have the same width.\n\t\tconst row = table.getChild( 0 );\n\n\t\treturn [ ...row.getChildren() ].reduce( ( columns, row ) => {\n\t\t\tconst columnWidth = parseInt( row.getAttribute( 'colspan' ) || 1 );\n\n\t\t\treturn columns + columnWidth;\n\t\t}, 0 );\n\t}\n}\n\n// Creates empty rows at the given index in an existing table.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/element~Element} table\n// @param {Number} insertAt Row index of row insertion.\n// @param {Number} rows Number of rows to create.\n// @param {Number} tableCellToInsert Number of cells to insert in each row.\nfunction createEmptyRows( writer, table, insertAt, rows, tableCellToInsert, attributes = {} ) {\n\tfor ( let i = 0; i < rows; i++ ) {\n\t\tconst tableRow = writer.createElement( 'tableRow' );\n\n\t\twriter.insert( tableRow, table, insertAt );\n\n\t\tcreateCells( tableCellToInsert, writer, writer.createPositionAt( tableRow, 'end' ), attributes );\n\t}\n}\n\n// Creates cells at a given position.\n//\n// @param {Number} columns Number of columns to create\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/position~Position} insertPosition\nfunction createCells( cells, writer, insertPosition, attributes = {} ) {\n\tfor ( let i = 0; i < cells; i++ ) {\n\t\tcreateEmptyTableCell( writer, insertPosition, attributes );\n\t}\n}\n\n// Evenly distributes the span of a cell to a number of provided cells.\n// The resulting spans will always be integer values.\n//\n// For instance breaking a span of 7 into 3 cells will return:\n//\n//\t\t{ newCellsSpan: 2, updatedSpan: 3 }\n//\n// as two cells will have a span of 2 and the remainder will go the first cell so its span will change to 3.\n//\n// @param {Number} span Span value do break.\n// @param {Number} numberOfCells Number of resulting spans.\n// @returns {{newCellsSpan: Number, updatedSpan: Number}}\nfunction breakSpanEvenly( span, numberOfCells ) {\n\tif ( span < numberOfCells ) {\n\t\treturn { newCellsSpan: 1, updatedSpan: 1 };\n\t}\n\n\tconst newCellsSpan = Math.floor( span / numberOfCells );\n\tconst updatedSpan = ( span - newCellsSpan * numberOfCells ) + newCellsSpan;\n\n\treturn { newCellsSpan, updatedSpan };\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-layout-post-fixer\n */\n\nimport { createEmptyTableCell, findAncestor, updateNumericAttribute } from './../commands/utils';\nimport TableWalker from './../tablewalker';\n\n/**\n * Injects a table layout post-fixer into the model.\n *\n * The role of the table layout post-fixer is to ensure that the table rows have the correct structure\n * after a {@link module:engine/model/model~Model#change `change()`} block was executed.\n *\n * The correct structure means that:\n *\n * * All table rows have the same size.\n * * None of a table cells that extend vertically beyond their section (either header or body).\n * * A table cell has always at least one element as child.\n *\n * If the table structure is not correct, the post-fixer will automatically correct it in two steps:\n *\n * 1. It will clip table cells that extends beyond it section.\n * 2. It will add empty table cells to those rows which are narrower then the widest table row.\n *\n * ## Clipping overlapping table cells\n *\n * Such situation may occur when pasting a table (or part of a table) to the editor from external sources.\n *\n * For example, see the following table which has the cell (FOO) with the rowspan attribute (2):\n *\n *\t\t<table headingRows=\"1\">\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell rowspan=\"2\"><paragraph>FOO</paragraph></tableCell>\n *\t\t\t\t<tableCell colspan=\"2\"><paragraph>BAR</paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell><paragraph>BAZ</paragraph></tableCell>\n *\t\t\t\t<tableCell><paragraph>XYZ</paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * will be rendered in the view as:\n *\n *\t\t<table>\n *\t\t\t<thead>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td rowspan=\"2\">FOO</td>\n *\t\t\t\t\t<td colspan=\"2\">BAR</td>\n *\t\t\t\t</tr>\n *\t\t\t</thead>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>BAZ</td>\n *\t\t\t\t\t<td>XYZ</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * In the above example the table will be rendered as a table with two rows - one in the header and second one in the body.\n * The table cell (FOO) cannot span over multiple rows as it would expand from the header to the body section.\n * The `rowspan` attribute must be changed to (1). The value (1) is a default value of the `rowspan` attribute\n * so the `rowspan` attribute will be removed from the model.\n *\n * The table cell with BAZ contents will be in the first column of the table.\n *\n * ## Adding missing table cells\n *\n * The table post-fixer will insert empty table cells to equalize table rows sizes (number of columns).\n * The size of a table row is calculated by counting column spans of table cells - both horizontal (from the same row) and\n * vertical (from rows above).\n *\n * In the above example, the table row in the body section of the table is narrower then the row from the header - it has two cells\n * with the default colspan (1). The header row has one cell with colspan (1) and second with colspan (2).\n * The table cell (FOO) does not expand beyond the head section (and as such will be fixed in the first step of this post-fixer).\n * The post-fixer will add a missing table cell to the row in the body section of the table.\n *\n * The table from the above example will be fixed and rendered to the view as below:\n *\n *\t\t<table>\n *\t\t\t<thead>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td rowspan=\"2\">FOO</td>\n *\t\t\t\t\t<td colspan=\"2\">BAR</td>\n *\t\t\t\t</tr>\n *\t\t\t</thead>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>BAZ</td>\n *\t\t\t\t\t<td>XYZ</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * ## Collaboration & Undo - Expectations vs post-fixer results\n *\n * The table post-fixer only ensures proper structure without deeper analysis of the nature of a change. As such, it might lead\n * to a structure which was not intended by the user changes. In particular, it will also fix undo steps (in conjunction with collaboration)\n * in which editor content might not return to the original state.\n *\n * This will usually happen when one or more users changes size of the table.\n *\n * As en example see a table below:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * and user actions:\n *\n * 1. Both user have table with two rows and two columns.\n * 2. User A adds a column at the end of the table - this will insert empty table cells to two rows.\n * 3. User B adds a row at the end of the table- this will insert a row with two empty table cells.\n * 4. Both users will have a table as below:\n *\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * The last row is shorter then others so table post-fixer will add empty row to tha last row:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by A)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * Unfortunately undo doesn't know the nature of changes and depending which user will apply post-fixer changes undoing them might lead to\n * broken table. If User B will undo inserting column to a table the undo engine will undo only operations of\n * inserting empty cells to rows from initial table state (row 1 & 2) but the cell in post-fixed row will remain:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n *\n * After undo the table post-fixer will detect that two rows are shorter then other and will fix table to:\n *\n *\t\t<table>\n *\t\t\t<tbody>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>11</td>\n *\t\t\t\t\t<td>12</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer after undo)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>21</td>\n *\t\t\t\t\t<td>22</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer after undo)</td>\n *\t\t\t\t</tr>\n *\t\t\t\t<tr>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by B)</td>\n *\t\t\t\t\t<td>(empty, inserted by a post-fixer)</td>\n *\t\t\t\t</tr>\n *\t\t\t</tbody>\n *\t\t</table>\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableLayoutPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => tableLayoutPostFixer( writer, model ) );\n}\n\n// The table layout post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction tableLayoutPostFixer( writer, model ) {\n\tconst changes = model.document.differ.getChanges();\n\n\tlet wasFixed = false;\n\n\t// Do not analyze the same table more then once - may happen for multiple changes in the same table.\n\tconst analyzedTables = new Set();\n\n\tfor ( const entry of changes ) {\n\t\tlet table;\n\n\t\tif ( entry.name == 'table' && entry.type == 'insert' ) {\n\t\t\ttable = entry.position.nodeAfter;\n\t\t}\n\n\t\t// Fix table on adding/removing table cells and rows.\n\t\tif ( entry.name == 'tableRow' || entry.name == 'tableCell' ) {\n\t\t\ttable = findAncestor( 'table', entry.position );\n\t\t}\n\n\t\t// Fix table on any table's attribute change - including attributes of table cells.\n\t\tif ( isTableAttributeEntry( entry ) ) {\n\t\t\ttable = findAncestor( 'table', entry.range.start );\n\t\t}\n\n\t\tif ( table && !analyzedTables.has( table ) ) {\n\t\t\t// Step 1: correct rowspans of table cells if necessary.\n\t\t\t// The wasFixed flag should be true if any of tables in batch was fixed - might be more then one.\n\t\t\twasFixed = fixTableCellsRowspan( table, writer ) || wasFixed;\n\t\t\t// Step 2: fix table rows sizes.\n\t\t\twasFixed = fixTableRowsSizes( table, writer ) || wasFixed;\n\n\t\t\tanalyzedTables.add( table );\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes the invalid value of the rowspan attribute because a table cell cannot vertically extend beyond the table section it belongs to.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean} Returns true if table was fixed.\nfunction fixTableCellsRowspan( table, writer ) {\n\tlet wasFixed = false;\n\n\tconst cellsToTrim = findCellsToTrim( table );\n\n\tif ( cellsToTrim.length ) {\n\t\twasFixed = true;\n\n\t\tfor ( const data of cellsToTrim ) {\n\t\t\tupdateNumericAttribute( 'rowspan', data.rowspan, data.cell, writer, 1 );\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Makes all table rows in a table the same size.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean} Returns true if table was fixed.\nfunction fixTableRowsSizes( table, writer ) {\n\tlet wasFixed = false;\n\n\tconst rowsLengths = getRowsLengths( table );\n\tconst tableSize = rowsLengths[ 0 ];\n\n\tconst isValid = Object.values( rowsLengths ).every( length => length === tableSize );\n\n\tif ( !isValid ) {\n\t\tconst maxColumns = Object.values( rowsLengths ).reduce( ( prev, current ) => current > prev ? current : prev, 0 );\n\n\t\tfor ( const [ rowIndex, size ] of Object.entries( rowsLengths ) ) {\n\t\t\tconst columnsToInsert = maxColumns - size;\n\n\t\t\tif ( columnsToInsert ) {\n\t\t\t\tfor ( let i = 0; i < columnsToInsert; i++ ) {\n\t\t\t\t\tcreateEmptyTableCell( writer, writer.createPositionAt( table.getChild( rowIndex ), 'end' ) );\n\t\t\t\t}\n\n\t\t\t\twasFixed = true;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Searches for the table cells that extends beyond the table section to which they belong to. It will return an array of objects\n// that holds table cells to be trimmed and correct value of a rowspan attribute to set.\n//\n// @param {module:engine/model/element~Element} table\n// @returns {Array.<{{cell, rowspan}}>}\nfunction findCellsToTrim( table ) {\n\tconst headingRows = parseInt( table.getAttribute( 'headingRows' ) || 0 );\n\tconst maxRows = table.childCount;\n\n\tconst cellsToTrim = [];\n\n\tfor ( const { row, rowspan, cell } of new TableWalker( table ) ) {\n\t\t// Skip cells that do not expand over its row.\n\t\tif ( rowspan < 2 ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst isInHeader = row < headingRows;\n\n\t\t// Row limit is either end of header section or whole table as table body is after the header.\n\t\tconst rowLimit = isInHeader ? headingRows : maxRows;\n\n\t\t// If table cell expands over its limit reduce it height to proper value.\n\t\tif ( row + rowspan > rowLimit ) {\n\t\t\tconst newRowspan = rowLimit - row;\n\n\t\t\tcellsToTrim.push( { cell, rowspan: newRowspan } );\n\t\t}\n\t}\n\n\treturn cellsToTrim;\n}\n\n// Returns an object with lengths of rows assigned to the corresponding row index.\n//\n// @param {module:engine/model/element~Element} table\n// @returns {Object}\nfunction getRowsLengths( table ) {\n\tconst lengths = {};\n\n\tfor ( const { row } of new TableWalker( table, { includeSpanned: true } ) ) {\n\t\tif ( !lengths[ row ] ) {\n\t\t\tlengths[ row ] = 0;\n\t\t}\n\n\t\tlengths[ row ] += 1;\n\t}\n\n\treturn lengths;\n}\n\n// Checks if the differ entry for an attribute change is one of table's attributes.\n//\n// @param entry\n// @returns {Boolean}\nfunction isTableAttributeEntry( entry ) {\n\tconst isAttributeType = entry.type === 'attribute';\n\tconst key = entry.attributeKey;\n\n\treturn isAttributeType && ( key === 'headingRows' || key === 'colspan' || key === 'rowspan' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-cell-paragraph-post-fixer\n */\n\n/**\n * Injects a table cell post-fixer into the model which inserts `paragraph` element into empty table cells.\n *\n * A table cell must contain at least one block element as a child. An empty table cell will have empty `paragraph` as a child.\n *\n *\t\t<table>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * Will be fixed to:\n *\n *\t\t<table>\n *\t\t\t<tableRow>\n *\t\t\t\t<tableCell><paragraph></paragraph></tableCell>\n *\t\t\t</tableRow>\n *\t\t</table>\n *\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableCellParagraphPostFixer( model ) {\n\tmodel.document.registerPostFixer( writer => tableCellContentsPostFixer( writer, model ) );\n}\n\n// The table cell contents post-fixer.\n//\n// @param {module:engine/model/writer~Writer} writer\n// @param {module:engine/model/model~Model} model\nfunction tableCellContentsPostFixer( writer, model ) {\n\tconst changes = model.document.differ.getChanges();\n\n\tlet wasFixed = false;\n\n\tfor ( const entry of changes ) {\n\t\tif ( entry.type == 'insert' && entry.name == 'table' ) {\n\t\t\twasFixed = fixTable( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableRow' ) {\n\t\t\twasFixed = fixTableRow( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( entry.type == 'insert' && entry.name == 'tableCell' ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.nodeAfter, writer ) || wasFixed;\n\t\t}\n\n\t\tif ( checkTableCellChange( entry ) ) {\n\t\t\twasFixed = fixTableCellContent( entry.position.parent, writer ) || wasFixed;\n\t\t}\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTable( table, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const row of table.getChildren() ) {\n\t\twasFixed = fixTableRow( row, writer ) || wasFixed;\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cells in a table row.\n//\n// @param {module:engine/model/element~Element} tableRow\n// @param {module:engine/model/writer~Writer} writer\nfunction fixTableRow( tableRow, writer ) {\n\tlet wasFixed = false;\n\n\tfor ( const tableCell of tableRow.getChildren() ) {\n\t\twasFixed = fixTableCellContent( tableCell, writer ) || wasFixed;\n\t}\n\n\treturn wasFixed;\n}\n\n// Fixes all table cell content by:\n// - adding paragraph to a table cell without any child.\n// - wrapping direct $text in <paragraph>.\n//\n// @param {module:engine/model/element~Element} table\n// @param {module:engine/model/writer~Writer} writer\n// @returns {Boolean}\nfunction fixTableCellContent( tableCell, writer ) {\n\t// Insert paragraph to an empty table cell.\n\tif ( tableCell.childCount == 0 ) {\n\t\twriter.insertElement( 'paragraph', tableCell );\n\n\t\treturn true;\n\t}\n\n\t// Check table cell children for directly placed text nodes.\n\t// Temporary solution. See https://github.com/ckeditor/ckeditor5/issues/1464.\n\tconst textNodes = Array.from( tableCell.getChildren() ).filter( child => child.is( 'text' ) );\n\n\tfor ( const child of textNodes ) {\n\t\twriter.wrap( writer.createRangeOn( child ), 'paragraph' );\n\t}\n\n\t// Return true when there were text nodes to fix.\n\treturn !!textNodes.length;\n}\n\n// Check if differ change should fix table cell. This happens on:\n// - removing content from table cell (ie tableCell can be left empty).\n// - adding text node directly into a table cell.\n//\n// @param {Object} differ change entry\n// @returns {Boolean}\nfunction checkTableCellChange( entry ) {\n\tif ( !entry.position || !entry.position.parent.is( 'tableCell' ) ) {\n\t\treturn false;\n\t}\n\n\treturn entry.type == 'insert' && entry.name == '$text' || entry.type == 'remove';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/converters/table-cell-refresh-post-fixer\n */\n\n/**\n * Injects a table cell post-fixer into the model which marks the table cell in the differ to have it re-rendered.\n *\n * Model `paragraph` inside a table cell can be rendered as `<span>` or `<p>`. It is rendered as `<span>` if this is the only block\n * element in that table cell and it doesn't have any attributes. It is rendered as `<p>` otherwise.\n *\n * When table cell content changes, for example a second `paragraph` element is added we need to ensure that the first `paragraph` is\n * re-rendered so it changes to `<p>` from `<span>`. The easiest way to do it is to re-render whole table cell.\n *\n * @param {module:engine/model/model~Model} model\n */\nexport default function injectTableCellRefreshPostFixer( model ) {\n\tmodel.document.registerPostFixer( () => tableCellRefreshPostFixer( model ) );\n}\n\nfunction tableCellRefreshPostFixer( model ) {\n\tconst differ = model.document.differ;\n\n\t// Stores cells to be refreshed so the table cell will be refreshed once for multiple changes.\n\tconst cellsToRefresh = new Set();\n\n\tfor ( const change of differ.getChanges() ) {\n\t\tconst parent = change.type == 'insert' || change.type == 'remove' ? change.position.parent : change.range.start.parent;\n\n\t\tif ( parent.is( 'tableCell' ) && checkRefresh( parent, change.type ) ) {\n\t\t\tcellsToRefresh.add( parent );\n\t\t}\n\t}\n\n\tif ( cellsToRefresh.size ) {\n\t\tfor ( const tableCell of cellsToRefresh.values() ) {\n\t\t\tdiffer.refreshItem( tableCell );\n\t\t}\n\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Checks if the model table cell requires refreshing to be re-rendered to a proper state in the view.\n//\n// This methods detects changes that will require renaming <span> to <p> (or vice versa) in the view.\n//\n// This method is a simple heuristic that checks only a single change and will sometimes give a false positive result when multiple changes\n// will result in a state that does not require renaming in the view (but will be seen as requiring a refresh).\n//\n// For instance: a `<span>` should be renamed to `<p>` when adding an attribute to a `<paragraph>`.\n// But adding one attribute and removing another one will result in a false positive: the check for added attribute will see one attribute\n// on a paragraph and will falsy qualify such change as adding an attribute to a paragraph without any attribute.\n//\n// @param {module:engine/model/element~Element} tableCell Table cell to check.\n// @param {String} type Type of change.\nfunction checkRefresh( tableCell, type ) {\n\tconst hasInnerParagraph = Array.from( tableCell.getChildren() ).some( child => child.is( 'paragraph' ) );\n\n\t// If there is no paragraph in table cell then the view doesn't require refreshing.\n\t//\n\t// Why? What we really want to achieve is to make all the old paragraphs (which weren't added in this batch) to be\n\t// converted once again, so that the paragraph-in-table-cell converter can correctly create a `<p>` or a `<span>` element.\n\t// If there are no paragraphs in the table cell, we don't care.\n\tif ( !hasInnerParagraph ) {\n\t\treturn false;\n\t}\n\n\t// For attribute change we only refresh if there is a single paragraph as in this case we may want to change existing `<span>` to `<p>`.\n\tif ( type == 'attribute' ) {\n\t\tconst attributesCount = Array.from( tableCell.getChild( 0 ).getAttributeKeys() ).length;\n\n\t\treturn tableCell.childCount === 1 && attributesCount < 2;\n\t}\n\n\t// For other changes (insert, remove) the `<span>` to `<p>` change is needed when:\n\t//\n\t// - another element is added to a single paragraph (childCount becomes >= 2)\n\t// - another element is removed and a single paragraph is left (childCount == 1)\n\treturn tableCell.childCount <= ( type == 'insert' ? 2 : 1 );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/tableediting\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport upcastTable, { upcastTableCell } from './converters/upcasttable';\nimport {\n\tdowncastInsertCell,\n\tdowncastInsertRow,\n\tdowncastInsertTable,\n\tdowncastRemoveRow,\n\tdowncastTableHeadingColumnsChange,\n\tdowncastTableHeadingRowsChange\n} from './converters/downcast';\n\nimport InsertTableCommand from './commands/inserttablecommand';\nimport InsertRowCommand from './commands/insertrowcommand';\nimport InsertColumnCommand from './commands/insertcolumncommand';\nimport SplitCellCommand from './commands/splitcellcommand';\nimport MergeCellCommand from './commands/mergecellcommand';\nimport RemoveRowCommand from './commands/removerowcommand';\nimport RemoveColumnCommand from './commands/removecolumncommand';\nimport SetHeaderRowCommand from './commands/setheaderrowcommand';\nimport SetHeaderColumnCommand from './commands/setheadercolumncommand';\nimport { findAncestor } from './commands/utils';\nimport TableUtils from '../src/tableutils';\n\nimport injectTableLayoutPostFixer from './converters/table-layout-post-fixer';\nimport injectTableCellParagraphPostFixer from './converters/table-cell-paragraph-post-fixer';\nimport injectTableCellRefreshPostFixer from './converters/table-cell-refresh-post-fixer';\n\nimport '../theme/tableediting.css';\n\n/**\n * The table editing feature.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableEditing extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'TableEditing';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst model = editor.model;\n\t\tconst schema = model.schema;\n\t\tconst conversion = editor.conversion;\n\n\t\tschema.register( 'table', {\n\t\t\tallowWhere: '$block',\n\t\t\tallowAttributes: [ 'headingRows', 'headingColumns' ],\n\t\t\tisLimit: true,\n\t\t\tisObject: true,\n\t\t\tisBlock: true\n\t\t} );\n\n\t\tschema.register( 'tableRow', {\n\t\t\tallowIn: 'table',\n\t\t\tisLimit: true\n\t\t} );\n\n\t\tschema.register( 'tableCell', {\n\t\t\tallowIn: 'tableRow',\n\t\t\tallowAttributes: [ 'colspan', 'rowspan' ],\n\t\t\tisLimit: true\n\t\t} );\n\n\t\t// Allow all $block content inside table cell.\n\t\tschema.extend( '$block', { allowIn: 'tableCell' } );\n\n\t\t// Disallow table in table.\n\t\tschema.addChildCheck( ( context, childDefinition ) => {\n\t\t\tif ( childDefinition.name == 'table' && Array.from( context.getNames() ).includes( 'table' ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t} );\n\n\t\t// Table conversion.\n\t\tconversion.for( 'upcast' ).add( upcastTable() );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertTable( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertTable() );\n\n\t\t// Table row conversion.\n\t\tconversion.for( 'upcast' ).elementToElement( { model: 'tableRow', view: 'tr' } );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertRow( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertRow() );\n\t\tconversion.for( 'downcast' ).add( downcastRemoveRow() );\n\n\t\t// Table cell conversion.\n\t\tconversion.for( 'upcast' ).add( upcastTableCell( 'td' ) );\n\t\tconversion.for( 'upcast' ).add( upcastTableCell( 'th' ) );\n\n\t\tconversion.for( 'editingDowncast' ).add( downcastInsertCell( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastInsertCell() );\n\n\t\t// Table attributes conversion.\n\t\tconversion.attributeToAttribute( { model: 'colspan', view: 'colspan' } );\n\t\tconversion.attributeToAttribute( { model: 'rowspan', view: 'rowspan' } );\n\n\t\t// Table heading rows and cols conversion.\n\t\tconversion.for( 'editingDowncast' ).add( downcastTableHeadingColumnsChange( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastTableHeadingColumnsChange() );\n\t\tconversion.for( 'editingDowncast' ).add( downcastTableHeadingRowsChange( { asWidget: true } ) );\n\t\tconversion.for( 'dataDowncast' ).add( downcastTableHeadingRowsChange() );\n\n\t\t// Define all the commands.\n\t\teditor.commands.add( 'insertTable', new InsertTableCommand( editor ) );\n\t\teditor.commands.add( 'insertTableRowAbove', new InsertRowCommand( editor, { order: 'above' } ) );\n\t\teditor.commands.add( 'insertTableRowBelow', new InsertRowCommand( editor, { order: 'below' } ) );\n\t\teditor.commands.add( 'insertTableColumnLeft', new InsertColumnCommand( editor, { order: 'left' } ) );\n\t\teditor.commands.add( 'insertTableColumnRight', new InsertColumnCommand( editor, { order: 'right' } ) );\n\n\t\teditor.commands.add( 'removeTableRow', new RemoveRowCommand( editor ) );\n\t\teditor.commands.add( 'removeTableColumn', new RemoveColumnCommand( editor ) );\n\n\t\teditor.commands.add( 'splitTableCellVertically', new SplitCellCommand( editor, { direction: 'vertically' } ) );\n\t\teditor.commands.add( 'splitTableCellHorizontally', new SplitCellCommand( editor, { direction: 'horizontally' } ) );\n\n\t\teditor.commands.add( 'mergeTableCellRight', new MergeCellCommand( editor, { direction: 'right' } ) );\n\t\teditor.commands.add( 'mergeTableCellLeft', new MergeCellCommand( editor, { direction: 'left' } ) );\n\t\teditor.commands.add( 'mergeTableCellDown', new MergeCellCommand( editor, { direction: 'down' } ) );\n\t\teditor.commands.add( 'mergeTableCellUp', new MergeCellCommand( editor, { direction: 'up' } ) );\n\n\t\teditor.commands.add( 'setTableColumnHeader', new SetHeaderColumnCommand( editor ) );\n\t\teditor.commands.add( 'setTableRowHeader', new SetHeaderRowCommand( editor ) );\n\n\t\tinjectTableLayoutPostFixer( model );\n\t\tinjectTableCellRefreshPostFixer( model );\n\t\tinjectTableCellParagraphPostFixer( model );\n\n\t\t// Handle tab key navigation.\n\t\tthis.editor.keystrokes.set( 'Tab', ( ...args ) => this._handleTabOnSelectedTable( ...args ), { priority: 'low' } );\n\t\tthis.editor.keystrokes.set( 'Tab', this._getTabHandler( true ), { priority: 'low' } );\n\t\tthis.editor.keystrokes.set( 'Shift+Tab', this._getTabHandler( false ), { priority: 'low' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ TableUtils ];\n\t}\n\n\t/**\n\t * Handles {@link module:engine/view/document~Document#event:keydown keydown} events for the <kbd>Tab</kbd> key executed\n\t * when the table widget is selected.\n\t *\n\t * @private\n\t * @param {module:utils/eventinfo~EventInfo} eventInfo\n\t * @param {module:engine/view/observer/domeventdata~DomEventData} domEventData\n\t */\n\t_handleTabOnSelectedTable( domEventData, cancel ) {\n\t\tconst editor = this.editor;\n\t\tconst selection = editor.model.document.selection;\n\n\t\tif ( !selection.isCollapsed && selection.rangeCount === 1 && selection.getFirstRange().isFlat ) {\n\t\t\tconst selectedElement = selection.getSelectedElement();\n\n\t\t\tif ( !selectedElement || !selectedElement.is( 'table' ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcancel();\n\n\t\t\teditor.model.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( selectedElement.getChild( 0 ).getChild( 0 ) ) );\n\t\t\t} );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a handler for {@link module:engine/view/document~Document#event:keydown keydown} events for the <kbd>Tab</kbd> key executed\n\t * inside table cell.\n\t *\n\t * @private\n\t * @param {Boolean} isForward Whether this handler will move selection to the next cell or previous.\n\t */\n\t_getTabHandler( isForward ) {\n\t\tconst editor = this.editor;\n\n\t\treturn ( domEventData, cancel ) => {\n\t\t\tconst selection = editor.model.document.selection;\n\n\t\t\tconst firstPosition = selection.getFirstPosition();\n\n\t\t\tconst tableCell = findAncestor( 'tableCell', firstPosition );\n\n\t\t\tif ( !tableCell ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcancel();\n\n\t\t\tconst tableRow = tableCell.parent;\n\t\t\tconst table = tableRow.parent;\n\n\t\t\tconst currentRowIndex = table.getChildIndex( tableRow );\n\t\t\tconst currentCellIndex = tableRow.getChildIndex( tableCell );\n\n\t\t\tconst isFirstCellInRow = currentCellIndex === 0;\n\n\t\t\tif ( !isForward && isFirstCellInRow && currentRowIndex === 0 ) {\n\t\t\t\t// It's the first cell of a table - don't do anything (stay in current position).\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst isLastCellInRow = currentCellIndex === tableRow.childCount - 1;\n\t\t\tconst isLastRow = currentRowIndex === table.childCount - 1;\n\n\t\t\tif ( isForward && isLastRow && isLastCellInRow ) {\n\t\t\t\teditor.execute( 'insertTableRowBelow' );\n\n\t\t\t\t// Check if the command actually added a row. If `insertTableRowBelow` execution didn't add a row (because it was disabled\n\t\t\t\t// or it got overwritten) do not change the selection.\n\t\t\t\tif ( currentRowIndex === table.childCount - 1 ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tlet cellToFocus;\n\n\t\t\t// Move to first cell in next row.\n\t\t\tif ( isForward && isLastCellInRow ) {\n\t\t\t\tconst nextRow = table.getChild( currentRowIndex + 1 );\n\n\t\t\t\tcellToFocus = nextRow.getChild( 0 );\n\t\t\t}\n\t\t\t// Move to last cell in a previous row.\n\t\t\telse if ( !isForward && isFirstCellInRow ) {\n\t\t\t\tconst previousRow = table.getChild( currentRowIndex - 1 );\n\n\t\t\t\tcellToFocus = previousRow.getChild( previousRow.childCount - 1 );\n\t\t\t}\n\t\t\t// Move to next/previous cell.\n\t\t\telse {\n\t\t\t\tcellToFocus = tableRow.getChild( currentCellIndex + ( isForward ? 1 : -1 ) );\n\t\t\t}\n\n\t\t\teditor.model.change( writer => {\n\t\t\t\twriter.setSelection( writer.createRangeIn( cellToFocus ) );\n\t\t\t} );\n\t\t};\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/ui/inserttableview\n */\n\nimport View from '@ckeditor/ckeditor5-ui/src/view';\n\nimport './../../theme/inserttable.css';\n\n/**\n * The table size view.\n *\n * It renders a 10x10 grid to choose the inserted table size.\n *\n * @extends module:ui/view~View\n * @implements module:ui/dropdown/dropdownpanelfocusable~DropdownPanelFocusable\n */\nexport default class InsertTableView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * A collection of table size box items.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis.items = this.createCollection();\n\n\t\t/**\n\t\t * The currently selected number of rows of the new table.\n\t\t *\n\t\t * @observable\n\t\t * @member {Number} #rows\n\t\t */\n\t\tthis.set( 'rows', 0 );\n\n\t\t/**\n\t\t * The currently selected number of columns of the new table.\n\t\t *\n\t\t * @observable\n\t\t * @member {Number} #columns\n\t\t */\n\t\tthis.set( 'columns', 0 );\n\n\t\t/**\n\t\t * The label text displayed under the boxes.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #label\n\t\t */\n\t\tthis.bind( 'label' )\n\t\t\t.to( this, 'columns', this, 'rows', ( columns, rows ) => `${ rows } × ${ columns }` );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [ 'ck' ]\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [ 'ck-insert-table-dropdown__grid' ]\n\t\t\t\t\t},\n\t\t\t\t\tchildren: this.items\n\t\t\t\t},\n\t\t\t\t{\n\t\t\t\t\ttag: 'div',\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [ 'ck-insert-table-dropdown__label' ]\n\t\t\t\t\t},\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttext: bind.to( 'label' )\n\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t],\n\n\t\t\ton: {\n\t\t\t\tmousedown: bind.to( evt => {\n\t\t\t\t\tevt.preventDefault();\n\t\t\t\t} ),\n\n\t\t\t\tclick: bind.to( () => {\n\t\t\t\t\tthis.fire( 'execute' );\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\n\t\t// Add grid boxes to table selection view.\n\t\tfor ( let index = 0; index < 100; index++ ) {\n\t\t\tconst boxView = new TableSizeGridBoxView();\n\n\t\t\t// Listen to box view 'over' event which indicates that mouse is over this box.\n\t\t\tboxView.on( 'over', () => {\n\t\t\t\t// Translate box index to the row & column index.\n\t\t\t\tconst row = Math.floor( index / 10 );\n\t\t\t\tconst column = index % 10;\n\n\t\t\t\t// As row & column indexes are zero-based transform it to number of selected rows & columns.\n\t\t\t\tthis.set( 'rows', row + 1 );\n\t\t\t\tthis.set( 'columns', column + 1 );\n\t\t\t} );\n\n\t\t\tthis.items.add( boxView );\n\t\t}\n\n\t\tthis.on( 'change:columns', () => {\n\t\t\tthis._highlightGridBoxes();\n\t\t} );\n\n\t\tthis.on( 'change:rows', () => {\n\t\t\tthis._highlightGridBoxes();\n\t\t} );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfocus() {\n\t\t// The dropdown panel expects DropdownPanelFocusable interface on views passed to dropdown panel. See #30.\n\t\t// The method should be implemented while working on keyboard support for this view. See #22.\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tfocusLast() {\n\t\t// The dropdown panel expects DropdownPanelFocusable interface on views passed to dropdown panel. See #30.\n\t\t// The method should be implemented while working on keyboard support for this view. See #22.\n\t}\n\n\t/**\n\t * Highlights grid boxes depending on rows and columns selected.\n\t *\n\t * @private\n\t */\n\t_highlightGridBoxes() {\n\t\tconst rows = this.rows;\n\t\tconst columns = this.columns;\n\n\t\tthis.items.map( ( boxView, index ) => {\n\t\t\t// Translate box index to the row & column index.\n\t\t\tconst itemRow = Math.floor( index / 10 );\n\t\t\tconst itemColumn = index % 10;\n\n\t\t\t// Grid box is highlighted when its row & column index belongs to selected number of rows & columns.\n\t\t\tconst isOn = itemRow < rows && itemColumn < columns;\n\n\t\t\tboxView.set( 'isOn', isOn );\n\t\t} );\n\t}\n}\n\n/**\n * A single grid box view element.\n *\n * This class is used to render the table size selection grid in {@link module:table/ui/inserttableview~InsertTableView}.\n *\n * @private\n */\nclass TableSizeGridBoxView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\tconst bind = this.bindTemplate;\n\n\t\t/**\n\t\t * Controls whether the grid box view is \"on\".\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isOn\n\t\t */\n\t\tthis.set( 'isOn', false );\n\n\t\tthis.setTemplate( {\n\t\t\ttag: 'div',\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-insert-table-dropdown-grid-box',\n\t\t\t\t\tbind.if( 'isOn', 'ck-on' )\n\t\t\t\t]\n\t\t\t},\n\t\t\ton: {\n\t\t\t\tmouseover: bind.to( 'over' )\n\t\t\t}\n\t\t} );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module table/tableui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport {\n addListToDropdown,\n createDropdown\n} from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport Model from '@ckeditor/ckeditor5-ui/src/model';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport InsertTableView from './ui/inserttableview';\nimport tableIcon from './../theme/icons/table.svg';\nimport tableColumnIcon from './../theme/icons/table-column.svg';\nimport tableRowIcon from './../theme/icons/table-row.svg';\nimport tableMergeCellIcon from './../theme/icons/table-merge-cell.svg';\n/**\n * The table UI plugin. It introduces:\n *\n * * The `'insertTable'` dropdown,\n * * The `'tableColumn'` dropdown,\n * * The `'tableRow'` dropdown,\n * * The `'mergeTableCells'` dropdown.\n *\n * The `'tableColumn'`, `'tableRow'`, `'mergeTableCells'` dropdowns work best with {@link module:table/tabletoolbar~TableToolbar}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const t = this.editor.t;\n const contentLanguageDirection = editor.locale.contentLanguageDirection;\n const isContentLtr = contentLanguageDirection === 'ltr';\n editor.ui.componentFactory.add('insertTable', locale => {\n const command = editor.commands.get('insertTable');\n const dropdownView = createDropdown(locale);\n dropdownView.bind('isEnabled').to(command);\n // Decorate dropdown's button.\n dropdownView.buttonView.set({\n icon: tableIcon,\n label: t('m'),\n tooltip: true\n });\n // Prepare custom view for dropdown's panel.\n const insertTableView = new InsertTableView(locale);\n dropdownView.panelView.children.add(insertTableView);\n insertTableView.delegate('execute').to(dropdownView);\n dropdownView.buttonView.on('open', () => {\n // Reset the chooser before showing it to the user.\n insertTableView.rows = 0;\n insertTableView.columns = 0;\n });\n dropdownView.on('execute', () => {\n editor.execute('insertTable', {\n rows: insertTableView.rows,\n columns: insertTableView.columns\n });\n editor.editing.view.focus();\n });\n return dropdownView;\n });\n editor.ui.componentFactory.add('tableColumn', locale => {\n const options = [\n {\n type: 'switchbutton',\n model: {\n commandName: 'setTableColumnHeader',\n label: t('n'),\n bindIsOn: true\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'insertTableColumnLeft' : 'insertTableColumnRight',\n label: t('o')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'insertTableColumnRight' : 'insertTableColumnLeft',\n label: t('p')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'removeTableColumn',\n label: t('q')\n }\n }\n ];\n return this._prepareDropdown(t('r'), tableColumnIcon, options, locale);\n });\n editor.ui.componentFactory.add('tableRow', locale => {\n const options = [\n {\n type: 'switchbutton',\n model: {\n commandName: 'setTableRowHeader',\n label: t('s'),\n bindIsOn: true\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: 'insertTableRowBelow',\n label: t('t')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'insertTableRowAbove',\n label: t('u')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'removeTableRow',\n label: t('v')\n }\n }\n ];\n return this._prepareDropdown(t('w'), tableRowIcon, options, locale);\n });\n editor.ui.componentFactory.add('mergeTableCells', locale => {\n const options = [\n {\n type: 'button',\n model: {\n commandName: 'mergeTableCellUp',\n label: t('x')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'mergeTableCellRight' : 'mergeTableCellLeft',\n label: t('y')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'mergeTableCellDown',\n label: t('z')\n }\n },\n {\n type: 'button',\n model: {\n commandName: isContentLtr ? 'mergeTableCellLeft' : 'mergeTableCellRight',\n label: t('aa')\n }\n },\n { type: 'separator' },\n {\n type: 'button',\n model: {\n commandName: 'splitTableCellVertically',\n label: t('ab')\n }\n },\n {\n type: 'button',\n model: {\n commandName: 'splitTableCellHorizontally',\n label: t('ac')\n }\n }\n ];\n return this._prepareDropdown(t('ad'), tableMergeCellIcon, options, locale);\n });\n }\n /**\n\t * Creates a dropdown view from the set of options.\n\t *\n\t * @private\n\t * @param {String} label The dropdown button label.\n\t * @param {String} icon An icon for the dropdown button.\n\t * @param {Array.<module:ui/dropdown/utils~ListDropdownItemDefinition>} options The list of options for the dropdown.\n\t * @param {module:utils/locale~Locale} locale\n\t * @returns {module:ui/dropdown/dropdownview~DropdownView}\n\t */\n _prepareDropdown(label, icon, options, locale) {\n const editor = this.editor;\n const dropdownView = createDropdown(locale);\n const commands = [];\n // Prepare dropdown list items for list dropdown.\n const itemDefinitions = new Collection();\n for (const option of options) {\n addListOption(option, editor, commands, itemDefinitions);\n }\n addListToDropdown(dropdownView, itemDefinitions);\n // Decorate dropdown's button.\n dropdownView.buttonView.set({\n label,\n icon,\n tooltip: true\n });\n // Make dropdown button disabled when all options are disabled.\n dropdownView.bind('isEnabled').toMany(commands, 'isEnabled', (...areEnabled) => {\n return areEnabled.some(isEnabled => isEnabled);\n });\n this.listenTo(dropdownView, 'execute', evt => {\n editor.execute(evt.source.commandName);\n editor.editing.view.focus();\n });\n return dropdownView;\n }\n}\n// Adds an option to a list view.\n//\n// @param {module:table/tableui~DropdownOption} option Configuration option.\n// @param {module:core/editor/editor~Editor} editor\n// @param {Array.<module:core/command~Command>} commands List of commands to update.\n// @param {Iterable.<module:ui/dropdown/utils~ListDropdownItemDefinition>} itemDefinitions\n// Collection of dropdown items to update with given option.\nfunction addListOption(option, editor, commands, itemDefinitions) {\n const model = option.model = new Model(option.model);\n const {commandName, bindIsOn} = option.model;\n if (option.type !== 'separator') {\n const command = editor.commands.get(commandName);\n commands.push(command);\n model.set({ commandName });\n model.bind('isEnabled').to(command);\n if (bindIsOn) {\n model.bind('isOn').to(command, 'value');\n }\n }\n model.set({ withText: true });\n itemDefinitions.add(option);\n}","export default \"<svg viewBox=\\\"0 0 20 20\\\" xmlns=\\\"http://www.w3.org/2000/svg\\\"><path d=\\\"M3 6v3h4V6H3zm0 4v3h4v-3H3zm0 4v3h4v-3H3zm5 3h4v-3H8v3zm5 0h4v-3h-4v3zm4-4v-3h-4v3h4zm0-4V6h-4v3h4zm1.5 8a1.5 1.5 0 0 1-1.5 1.5H3A1.5 1.5 0 0 1 1.5 17V4c.222-.863 1.068-1.5 2-1.5h13c.932 0 1.778.637 2 1.5v13zM12 13v-3H8v3h4zm0-4V6H8v3h4z\\\"/></svg>\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n// The editor creator to use.\nimport ClassicEditorBase from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';\n\nimport Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';\nimport UploadAdapter from '@ckeditor/ckeditor5-adapter-ckfinder/src/uploadadapter';\nimport Autoformat from '@ckeditor/ckeditor5-autoformat/src/autoformat';\nimport Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';\nimport Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';\nimport BlockQuote from '@ckeditor/ckeditor5-block-quote/src/blockquote';\nimport CKFinder from '@ckeditor/ckeditor5-ckfinder/src/ckfinder';\nimport EasyImage from '@ckeditor/ckeditor5-easy-image/src/easyimage';\nimport Heading from '@ckeditor/ckeditor5-heading/src/heading';\nimport Image from '@ckeditor/ckeditor5-image/src/image';\nimport ImageCaption from '@ckeditor/ckeditor5-image/src/imagecaption';\nimport ImageStyle from '@ckeditor/ckeditor5-image/src/imagestyle';\nimport ImageToolbar from '@ckeditor/ckeditor5-image/src/imagetoolbar';\nimport ImageUpload from '@ckeditor/ckeditor5-image/src/imageupload';\nimport Indent from '@ckeditor/ckeditor5-indent/src/indent';\nimport Link from '@ckeditor/ckeditor5-link/src/link';\nimport List from '@ckeditor/ckeditor5-list/src/list';\nimport MediaEmbed from '@ckeditor/ckeditor5-media-embed/src/mediaembed';\nimport Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';\nimport PasteFromOffice from '@ckeditor/ckeditor5-paste-from-office/src/pastefromoffice';\nimport Table from '@ckeditor/ckeditor5-table/src/table';\nimport TableToolbar from '@ckeditor/ckeditor5-table/src/tabletoolbar';\n\nexport default class ClassicEditor extends ClassicEditorBase {}\n\n// Plugins to include in the build.\nClassicEditor.builtinPlugins = [\n\tEssentials,\n\tUploadAdapter,\n\tAutoformat,\n\tBold,\n\tItalic,\n\tBlockQuote,\n\tCKFinder,\n\tEasyImage,\n\tHeading,\n\tImage,\n\tImageCaption,\n\tImageStyle,\n\tImageToolbar,\n\tImageUpload,\n\tIndent,\n\tLink,\n\tList,\n\tMediaEmbed,\n\tParagraph,\n\tPasteFromOffice,\n\tTable,\n\tTableToolbar\n];\n\n// Editor configuration.\nClassicEditor.defaultConfig = {\n\ttoolbar: {\n\t\titems: [\n\t\t\t'heading',\n\t\t\t'|',\n\t\t\t'bold',\n\t\t\t'italic',\n\t\t\t'link',\n\t\t\t'bulletedList',\n\t\t\t'numberedList',\n\t\t\t'|',\n\t\t\t'indent',\n\t\t\t'outdent',\n\t\t\t'|',\n\t\t\t'imageUpload',\n\t\t\t'blockQuote',\n\t\t\t'insertTable',\n\t\t\t'mediaEmbed',\n\t\t\t'undo',\n\t\t\t'redo'\n\t\t]\n\t},\n\timage: {\n\t\ttoolbar: [\n\t\t\t'imageStyle:full',\n\t\t\t'imageStyle:side',\n\t\t\t'|',\n\t\t\t'imageTextAlternative'\n\t\t]\n\t},\n\ttable: {\n\t\tcontentToolbar: [\n\t\t\t'tableColumn',\n\t\t\t'tableRow',\n\t\t\t'mergeTableCells'\n\t\t]\n\t},\n\t// This value must be kept in sync with the language defined in webpack.config.js.\n\tlanguage: 'en'\n};\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module essentials/essentials\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport Enter from '@ckeditor/ckeditor5-enter/src/enter';\nimport ShiftEnter from '@ckeditor/ckeditor5-enter/src/shiftenter';\nimport Typing from '@ckeditor/ckeditor5-typing/src/typing';\nimport Undo from '@ckeditor/ckeditor5-undo/src/undo';\n\n/**\n * A plugin including all essential editing features. It represents a set of features that enables similar functionalities\n * to a `<textarea>` element.\n *\n * It includes:\n *\n * * {@link module:clipboard/clipboard~Clipboard},\n * * {@link module:enter/enter~Enter},\n * * {@link module:enter/shiftenter~ShiftEnter},\n * * {@link module:typing/typing~Typing},\n * * {@link module:undo/undo~Undo}.\n *\n * This plugin set does not define any block-level containers (such as {@link module:paragraph/paragraph~Paragraph}).\n * If your editor is supposed to handle block content, make sure to include it.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Essentials extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard, Enter, ShiftEnter, Typing, Undo ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Essentials';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/bold\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BoldEditing from './bold/boldediting';\nimport BoldUI from './bold/boldui';\n\n/**\n * The bold feature.\n *\n * For a detailed overview check the {@glink features/basic-styles Basic styles feature documentation}\n * and the {@glink api/basic-styles package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:basic-styles/bold/boldediting~BoldEditing bold editing feature}\n * and {@link module:basic-styles/bold/boldui~BoldUI bold UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Bold extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ BoldEditing, BoldUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Bold';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module basic-styles/italic\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ItalicEditing from './italic/italicediting';\nimport ItalicUI from './italic/italicui';\n\n/**\n * The italic feature.\n *\n * For a detailed overview check the {@glink features/basic-styles Basic styles feature documentation}\n * and the {@glink api/basic-styles package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:basic-styles/italic/italicediting~ItalicEditing} and\n * {@link module:basic-styles/italic/italicui~ItalicUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Italic extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ItalicEditing, ItalicUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Italic';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module block-quote/blockquote\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport BlockQuoteEditing from './blockquoteediting';\nimport BlockQuoteUI from './blockquoteui';\n\n/**\n * The block quote plugin.\n *\n * For more information about this feature check the {@glink api/block-quote package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:block-quote/blockquoteediting~BlockQuoteEditing block quote editing feature}\n * and {@link module:block-quote/blockquoteui~BlockQuoteUI block quote UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class BlockQuote extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ BlockQuoteEditing, BlockQuoteUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'BlockQuote';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module ckfinder/ckfinder\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport CKFinderUI from './ckfinderui';\nimport CKFinderEditing from './ckfinderediting';\nimport CKFinderUploadAdapter from '@ckeditor/ckeditor5-adapter-ckfinder/src/uploadadapter';\n\n/**\n * The CKFinder feature, a bridge between the CKEditor 5 WYSIWYG editor and the\n * [CKFinder](https://ckeditor.com/ckfinder) file manager and uploader.\n *\n * This is a \"glue\" plugin which enables:\n *\n * * {@link module:ckfinder/ckfinderediting~CKFinderEditing},\n * * {@link module:ckfinder/ckfinderui~CKFinderUI},\n * * {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter}.\n *\n * See the {@glink features/image-upload/ckfinder \"CKFinder integration\" guide} to learn how to configure\n * and use this feature.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload\" guide} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class CKFinder extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'CKFinder';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ CKFinderEditing, CKFinderUI, CKFinderUploadAdapter ];\n\t}\n}\n\n/**\n * The configuration of the {@link module:ckfinder/ckfinder~CKFinder CKFinder feature}.\n *\n * Read more in {@link module:ckfinder/ckfinder~CKFinderConfig}.\n *\n * @member {module:ckfinder/ckfinder~CKFinderConfig} module:core/editor/editorconfig~EditorConfig#ckfinder\n */\n\n/**\n * The configuration of the {@link module:ckfinder/ckfinder~CKFinder CKFinder feature}\n * and its {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter upload adapter}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tckfinder: {\n *\t\t\t\t\toptions: {\n *\t\t\t\t\t\tresourceType: 'Images'\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface CKFinderConfig\n */\n\n/**\n * The configuration options passed to the CKFinder file manager instance.\n *\n * Check the file manager [documentation](https://ckeditor.com/docs/ckfinder/ckfinder3/#!/api/CKFinder.Config-cfg-language)\n * for the complete list of options.\n *\n * @member {Object} module:ckfinder/ckfinder~CKFinderConfig#options\n */\n\n/**\n * The type of the CKFinder opener method.\n *\n * Supported types are:\n *\n * * `'modal'` – Opens CKFinder in a modal,\n * * `'popup'` – Opens CKFinder in a new \"pop-up\" window.\n *\n * Defaults to `'modal'`.\n *\n * @member {String} module:ckfinder/ckfinder~CKFinderConfig#openerMethod\n */\n\n/**\n * The path (URL) to the connector which handles the file upload in CKFinder file manager.\n * When specified, it enables the automatic upload of resources such as images inserted into the content.\n *\n * For instance, to use CKFinder's\n * [quick upload](https://ckeditor.com/docs/ckfinder/ckfinder3-php/commands.html#command_quick_upload)\n * command, your can use the following (or similar) path:\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tckfinder: {\n *\t\t\t\t\tuploadUrl: '/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files&responseType=json'\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * Used by the {@link module:adapter-ckfinder/uploadadapter~CKFinderUploadAdapter upload adapter}.\n *\n * @member {String} module:ckfinder/ckfinder~CKFinderConfig#uploadUrl\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module easy-image/easyimage\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport CloudServicesUploadAdapter from './cloudservicesuploadadapter';\nimport Image from '@ckeditor/ckeditor5-image/src/image';\nimport ImageUpload from '@ckeditor/ckeditor5-image/src/imageupload';\n\n/**\n * The Easy Image feature, which makes the image upload in CKEditor 5 possible with virtually zero\n * server setup. A part of the [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/)\n * family.\n *\n * This is a \"glue\" plugin which enables:\n *\n * * {@link module:image/image~Image},\n * * {@link module:image/imageupload~ImageUpload},\n * * {@link module:easy-image/cloudservicesuploadadapter~CloudServicesUploadAdapter}.\n *\n * See the {@glink features/image-upload/easy-image \"Easy Image integration\" guide} to learn how to configure\n * and use this feature.\n *\n * Check out the {@glink features/image-upload/image-upload comprehensive \"Image upload\" guide} to learn about\n * other ways to upload images into CKEditor 5.\n *\n * **Note**: After enabling the Easy Image plugin you need to configure the\n * [CKEditor Cloud Services](https://ckeditor.com/ckeditor-cloud-services/)\n * integration through {@link module:cloud-services/cloudservices~CloudServicesConfig `config.cloudServices`}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class EasyImage extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [\n\t\t\tCloudServicesUploadAdapter,\n\t\t\tImage,\n\t\t\tImageUpload\n\t\t];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'EasyImage';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module heading/heading\n */\n\nimport HeadingEditing from './headingediting';\nimport HeadingUI from './headingui';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport '../theme/heading.css';\n\n/**\n * The headings feature.\n *\n * For a detailed overview, check the {@glink features/headings Headings feature documentation}\n * and the {@glink api/heading package page}.\n *\n * This is a \"glue\" plugin which loads the {@link module:heading/headingediting~HeadingEditing heading editing feature}\n * and {@link module:heading/headingui~HeadingUI heading UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Heading extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ HeadingEditing, HeadingUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Heading';\n\t}\n}\n\n/**\n * The configuration of the heading feature. Introduced by the {@link module:heading/headingediting~HeadingEditing} feature.\n *\n * Read more in {@link module:heading/heading~HeadingConfig}.\n *\n * @member {module:heading/heading~HeadingConfig} module:core/editor/editorconfig~EditorConfig#heading\n */\n\n/**\n * The configuration of the heading feature.\n * The option is used by the {@link module:heading/headingediting~HeadingEditing} feature.\n *\n *\t\tClassicEditor\n *\t\t\t.create( {\n * \t\t\t\theading: ... // Heading feature config.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface HeadingConfig\n */\n\n/**\n * The available heading options.\n *\n * The default value is:\n *\n *\t\tconst headingConfig = {\n *\t\t\toptions: [\n *\t\t\t\t{ model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },\n *\t\t\t\t{ model: 'heading1', view: 'h2', title: 'Heading 1', class: 'ck-heading_heading1' },\n *\t\t\t\t{ model: 'heading2', view: 'h3', title: 'Heading 2', class: 'ck-heading_heading2' },\n *\t\t\t\t{ model: 'heading3', view: 'h4', title: 'Heading 3', class: 'ck-heading_heading3' }\n *\t\t\t]\n *\t\t};\n *\n * It defines 3 levels of headings. In the editor model they will use `heading1`, `heading2`, and `heading3` elements.\n * Their respective view elements (so the elements output by the editor) will be: `h2`, `h3`, and `h4`. This means that\n * if you choose \"Heading 1\" in the headings dropdown the editor will turn the current block to `<heading1>` in the model\n * which will result in rendering (and outputting to data) the `<h2>` element.\n *\n * The `title` and `class` properties will be used by the `headings` dropdown to render available options.\n * Usually, the first option in the headings dropdown is the \"Paragraph\" option, hence it's also defined on the list.\n * However, you don't need to define its view representation because it's handled by\n * the {@link module:paragraph/paragraph~Paragraph} feature (which is required by\n * the {@link module:heading/headingediting~HeadingEditing} feature).\n *\n * You can **read more** about configuring heading levels and **see more examples** in\n * the {@glink features/headings Headings} guide.\n *\n * Note: In the model you should always start from `heading1`, regardless of how the headings are represented in the view.\n * That's assumption is used by features like {@link module:autoformat/autoformat~Autoformat} to know which element\n * they should use when applying the first level heading.\n *\n * The defined headings are also available as values passed to the `'heading'` command under their model names.\n * For example, the below code will apply `<heading1>` to the current selection:\n *\n *\t\teditor.execute( 'heading', { value: 'heading1' } );\n *\n * @member {Array.<module:heading/heading~HeadingOption>} module:heading/heading~HeadingConfig#options\n */\n\n/**\n * Heading option descriptor.\n *\n * @typedef {Object} module:heading/heading~HeadingOption\n * @property {String} model Name of the model element to convert.\n * @property {module:engine/view/elementdefinition~ElementDefinition} view Definition of a view element to convert from/to.\n * @property {String} title The user-readable title of the option.\n * @property {String} class The class which will be added to the dropdown item representing this option.\n * @property {String} [icon] Icon used by {@link module:heading/headingbuttonsui~HeadingButtonsUI}. It can be omitted when using\n * the default configuration.\n * @extends module:engine/conversion/conversion~ConverterDefinition\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagecaption\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageCaptionEditing from './imagecaption/imagecaptionediting';\n\nimport '../theme/imagecaption.css';\n\n/**\n * The image caption plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-captions image caption} documentation.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageCaption extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageCaptionEditing ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageCaption';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module image/imagestyle\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport ImageStyleEditing from './imagestyle/imagestyleediting';\nimport ImageStyleUI from './imagestyle/imagestyleui';\n\n/**\n * The image style plugin.\n *\n * For a detailed overview, check the {@glink features/image#image-styles image styles} documentation.\n *\n * This is a \"glue\" plugin which loads the {@link module:image/imagestyle/imagestyleediting~ImageStyleEditing}\n * and {@link module:image/imagestyle/imagestyleui~ImageStyleUI} plugins.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageStyle extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ImageStyleEditing, ImageStyleUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'ImageStyle';\n\t}\n}\n\n/**\n * Available image styles.\n *\n * The default value is:\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [ 'full', 'side' ]\n *\t\t};\n *\n * which configures two default styles:\n *\n * * the \"full\" style which does not apply any class, e.g. for images styled to span 100% width of the content,\n * * the \"side\" style with the `.image-style-side` CSS class.\n *\n * See {@link module:image/imagestyle/utils~defaultStyles} to learn more about default\n * styles provided by the image feature.\n *\n * The {@link module:image/imagestyle/utils~defaultStyles default styles} can be customized,\n * e.g. to change the icon, title or CSS class of the style. The feature also provides several\n * {@link module:image/imagestyle/utils~defaultIcons default icons} to choose from.\n *\n *\t\timport customIcon from 'custom-icon.svg';\n *\n *\t\t// ...\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [\n *\t\t\t\t// This will only customize the icon of the \"full\" style.\n *\t\t\t\t// Note: 'right' is one of default icons provided by the feature.\n *\t\t\t\t{ name: 'full', icon: 'right' },\n *\n *\t\t\t\t// This will customize the icon, title and CSS class of the default \"side\" style.\n *\t\t\t\t{ name: 'side', icon: customIcon, title: 'My side style', className: 'custom-side-image' }\n *\t\t\t]\n *\t\t};\n *\n * If none of the default styles is good enough, it is possible to define independent custom styles, too:\n *\n *\t\timport fullSizeIcon from '@ckeditor/ckeditor5-core/theme/icons/object-center.svg';\n *\t\timport sideIcon from '@ckeditor/ckeditor5-core/theme/icons/object-right.svg';\n *\n *\t\t// ...\n *\n *\t\tconst imageConfig = {\n *\t\t\tstyles: [\n *\t\t\t\t// A completely custom full size style with no class, used as a default.\n *\t\t\t\t{ name: 'fullSize', title: 'Full size', icon: fullSizeIcon, isDefault: true },\n *\n *\t\t\t\t{ name: 'side', title: 'To the side', icon: sideIcon, className: 'side-image' }\n *\t\t\t]\n *\t\t};\n *\n * Note: Setting `title` to one of {@link module:image/imagestyle/imagestyleui~ImageStyleUI#localizedDefaultStylesTitles}\n * will automatically translate it to the language of the editor.\n *\n * Read more about styling images in the {@glink features/image#image-styles Image styles guide}.\n *\n * The feature creates commands based on defined styles, so you can change the style of a selected image by executing\n * the following command:\n *\n *\t\teditor.execute( 'imageStyle' { value: 'side' } );\n *\n * The feature also creates buttons that execute the commands. So, assuming that you use the\n * default image styles setting, you can {@link module:image/image~ImageConfig#toolbar configure the image toolbar}\n * (or any other toolbar) to contain these options:\n *\n *\t\tconst imageConfig = {\n *\t\t\ttoolbar: [ 'imageStyle:full', 'imageStyle:side' ]\n *\t\t};\n *\n * @member {Array.<module:image/imagestyle/imagestyleediting~ImageStyleFormat>} module:image/image~ImageConfig#styles\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module image/imagetoolbar\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { getSelectedImageWidget } from './image/utils';\nimport WidgetToolbarRepository from '@ckeditor/ckeditor5-widget/src/widgettoolbarrepository';\n/**\n * The image toolbar plugin. It creates and manages the image toolbar (the toolbar displayed when an image is selected).\n *\n * For a detailed overview, check the {@glink features/image#image-contextual-toolbar image contextual toolbar} documentation.\n *\n * Instances of toolbar components (e.g. buttons) are created using the editor's\n * {@link module:ui/componentfactory~ComponentFactory component factory}\n * based on the {@link module:image/image~ImageConfig#toolbar `image.toolbar` configuration option}.\n *\n * The toolbar uses the {@link module:ui/panel/balloon/contextualballoon~ContextualBalloon}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class ImageToolbar extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [WidgetToolbarRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'ImageToolbar';\n }\n /**\n\t * @inheritDoc\n\t */\n afterInit() {\n const editor = this.editor;\n const t = editor.t;\n const widgetToolbarRepository = editor.plugins.get(WidgetToolbarRepository);\n widgetToolbarRepository.register('image', {\n ariaLabel: t('b'),\n items: editor.config.get('image.toolbar') || [],\n getRelatedElement: getSelectedImageWidget\n });\n }\n} /**\n * Items to be placed in the image toolbar.\n * This option is used by the {@link module:image/imagetoolbar~ImageToolbar} feature.\n *\n * Assuming that you use the following features:\n *\n * * {@link module:image/imagestyle~ImageStyle} (with a default configuration),\n * * {@link module:image/imagetextalternative~ImageTextAlternative},\n *\n * three toolbar items will be available in {@link module:ui/componentfactory~ComponentFactory}:\n * `'imageStyle:full'`, `'imageStyle:side'`, and `'imageTextAlternative'` so you can configure the toolbar like this:\n *\n *\t\tconst imageConfig = {\n *\t\t\ttoolbar: [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:image/image~ImageConfig#toolbar\n */","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module indent/indent\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport IndentEditing from './indentediting';\nimport IndentUI from './indentui';\n\n/**\n * The indent feature.\n *\n * This plugin acts as a single entry point plugin for other features that implement indentation of elements like lists or paragraphs.\n *\n * The compatible features are:\n *\n * * The {@link module:list/list~List} or {@link module:list/listediting~ListEditing} feature for list indentation.\n * * The {@link module:indent/indentblock~IndentBlock} feature for block indentation.\n *\n * This is a \"glue\" plugin that loads the following plugins:\n *\n * * The {@link module:indent/indentediting~IndentEditing indent editing feature}.\n * * The {@link module:indent/indentui~IndentUI indent UI feature}.\n *\n * The dependent plugins register the `'indent'` and `'outdent'` commands and introduce the `'indent'` and `'outdent'` buttons\n * that allow to increase or decrease text indentation of supported elements.\n *\n * **Note**: In order for the commands and buttons to work, at least one of compatible features is required.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Indent extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Indent';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ IndentEditing, IndentUI ];\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module link/link\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport LinkEditing from './linkediting';\nimport LinkUI from './linkui';\n\n/**\n * The link plugin.\n *\n * This is a \"glue\" plugin that loads the {@link module:link/linkediting~LinkEditing link editing feature}\n * and {@link module:link/linkui~LinkUI link UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Link extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ LinkEditing, LinkUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Link';\n\t}\n}\n\n/**\n * The configuration of the {@link module:link/link~Link} feature.\n *\n * Read more in {@link module:link/link~LinkConfig}.\n *\n * @member {module:link/link~LinkConfig} module:core/editor/editorconfig~EditorConfig#link\n */\n\n/**\n * The configuration of the {@link module:link/link~Link link feature}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\tlink: ... // Link feature configuration.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n * @interface LinkConfig\n */\n\n/**\n * When set to `true`, the `target=\"blank\"` and `rel=\"noopener noreferrer\"` attributes are automatically added to all external links\n * in the editor. \"External links\" are all links in the editor content starting with `http`, `https`, or `//`.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tlink: {\n *\t\t\t\t\taddTargetToExternalLinks: true\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * Internally, this option activates a predefined {@link module:link/link~LinkConfig#decorators automatic link decorator}\n * that extends all external links with the `target` and `rel` attributes.\n *\n * **Note**: To control the `target` and `rel` attributes of specific links in the edited content, a dedicated\n * {@link module:link/link~LinkDecoratorManualDefinition manual} decorator must be defined in the\n * {@link module:link/link~LinkConfig#decorators `config.link.decorators`} array. In such scenario,\n * the `config.link.addTargetToExternalLinks` option should remain `undefined` or `false` to not interfere with the manual decorator.\n *\n * It is possible to add other {@link module:link/link~LinkDecoratorAutomaticDefinition automatic}\n * or {@link module:link/link~LinkDecoratorManualDefinition manual} link decorators when this option is active.\n *\n * More information about decorators can be found in the {@link module:link/link~LinkConfig#decorators decorators configuration}\n * reference.\n *\n * @default false\n * @member {Boolean} module:link/link~LinkConfig#addTargetToExternalLinks\n */\n\n/**\n * Decorators provide an easy way to configure and manage additional link attributes in the editor content. There are\n * two types of link decorators:\n *\n * * {@link module:link/link~LinkDecoratorAutomaticDefinition Automatic} – They match links against pre–defined rules and\n * manage their attributes based on the results.\n * * {@link module:link/link~LinkDecoratorManualDefinition Manual} – They allow users to control link attributes individually,\n * using the editor UI.\n *\n * Link decorators are defined as objects with key-value pairs, where the key is the name provided for a given decorator and the\n * value is the decorator definition.\n *\n * The name of the decorator also corresponds to the {@glink framework/guides/architecture/editing-engine#text-attributes text attribute}\n * in the model. For instance, the `isExternal` decorator below is represented as a `linkIsExternal` attribute in the model.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tlink: {\n *\t\t\t\t\tdecorators: {\n *\t\t\t\t\t\tisExternal: {\n *\t\t\t\t\t\t\tmode: 'automatic',\n *\t\t\t\t\t\t\tcallback: url => url.startsWith( 'http://' ),\n *\t\t\t\t\t\t\tattributes: {\n *\t\t\t\t\t\t\t\ttarget: '_blank',\n *\t\t\t\t\t\t\t\trel: 'noopener noreferrer'\n *\t\t\t\t\t\t\t}\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\tisDownloadable: {\n *\t\t\t\t\t\t\tmode: 'manual',\n *\t\t\t\t\t\t\tlabel: 'Downloadable',\n *\t\t\t\t\t\t\tattributes: {\n *\t\t\t\t\t\t\t\tdownload: 'file.png',\n *\t\t\t\t\t\t\t}\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t// ...\n *\t\t\t\t\t}\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * To learn more about the configuration syntax, check out the {@link module:link/link~LinkDecoratorAutomaticDefinition automatic}\n * and {@link module:link/link~LinkDecoratorManualDefinition manual} decorator option reference.\n *\n * **Warning:** Currently, link decorators work independently of one another and no conflict resolution mechanism exists.\n * For example, configuring the `target` attribute using both an automatic and a manual decorator at the same time could end up with\n * quirky results. The same applies if multiple manual or automatic decorators were defined for the same attribute.\n *\n * **Note**: Since the `target` attribute management for external links is a common use case, there is a predefined automatic decorator\n * dedicated for that purpose which can be enabled by turning a single option on. Check out the\n * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}\n * configuration description to learn more.\n *\n * See also the {@glink features/link#custom-link-attributes-decorators link feature guide} for more information.\n *\n * @member {Object.<String, module:link/link~LinkDecoratorDefinition>} module:link/link~LinkConfig#decorators\n */\n\n/**\n * Represents a link decorator definition ({@link module:link/link~LinkDecoratorManualDefinition `'manual'`}\n * or {@link module:link/link~LinkDecoratorAutomaticDefinition `'automatic'`}).\n *\n * @interface LinkDecoratorDefinition\n */\n\n/**\n * Link decorator type.\n *\n * Check out the {@glink features/link#custom-link-attributes-decorators link feature guide} for more information.\n *\n * @member {'manual'|'automatic'} module:link/link~LinkDecoratorDefinition#mode\n */\n\n/**\n * Describes an automatic {@link module:link/link~LinkConfig#decorators link decorator}. This decorator type matches\n * all links in the editor content against a function that decides whether the link should receive a pre–defined set of attributes.\n *\n * It takes an object with key-value pairs of attributes and a callback function that must return a Boolean value based on the link's\n * `href` (URL). When the callback returns `true`, attributes are applied to the link.\n *\n * For example, to add the `target=\"_blank\"` attribute to all links in the editor starting with `http://`, the\n * configuration could look like this:\n *\n *\t\t{\n *\t\t\tmode: 'automatic',\n *\t\t\tcallback: url => url.startsWith( 'http://' ),\n *\t\t\tattributes: {\n *\t\t\t\ttarget: '_blank'\n *\t\t\t}\n *\t\t}\n *\n * **Note**: Since the `target` attribute management for external links is a common use case, there is a predefined automatic decorator\n * dedicated for that purpose that can be enabled by turning a single option on. Check out the\n * {@link module:link/link~LinkConfig#addTargetToExternalLinks `config.link.addTargetToExternalLinks`}\n * configuration description to learn more.\n *\n * @typedef {Object} module:link/link~LinkDecoratorAutomaticDefinition\n * @property {'automatic'} mode Link decorator type. It is `'automatic'` for all automatic decorators.\n * @property {Function} callback Takes a `url` as a parameter and returns `true` if the `attributes` should be applied to the link.\n * @property {Object} attributes Key-value pairs used as link attributes added to the output during the\n * {@glink framework/guides/architecture/editing-engine#conversion downcasting}.\n * Attributes should follow the {@link module:engine/view/elementdefinition~ElementDefinition} syntax.\n */\n\n/**\n * Describes a manual {@link module:link/link~LinkConfig#decorators link decorator}. This decorator type is represented in\n * the link feature's {@link module:link/linkui user interface} as a switch that the user can use to control the presence\n * of a predefined set of attributes.\n *\n * For instance, to allow the users to manually control the presence of the `target=\"_blank\"` and\n * `rel=\"noopener noreferrer\"` attributes on specific links, the decorator could look as follows:\n *\n *\t\t{\n *\t\t\tmode: 'manual',\n *\t\t\tlabel: 'Open in a new tab',\n *\t\t\tattributes: {\n *\t\t\t\ttarget: '_blank',\n *\t\t\t\trel: 'noopener noreferrer'\n *\t\t\t}\n *\t\t}\n *\n * @typedef {Object} module:link/link~LinkDecoratorManualDefinition\n * @property {'manual'} mode Link decorator type. It is `'manual'` for all manual decorators.\n * @property {String} label The label of the UI button that the user can use to control the presence of link attributes.\n * @property {Object} attributes Key-value pairs used as link attributes added to the output during the\n * {@glink framework/guides/architecture/editing-engine#conversion downcasting}.\n * Attributes should follow the {@link module:engine/view/elementdefinition~ElementDefinition} syntax.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module list/list\n */\n\nimport ListEditing from './listediting';\nimport ListUI from './listui';\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\n/**\n * The list feature.\n *\n * This is a \"glue\" plugin that loads the {@link module:list/listediting~ListEditing list editing feature}\n * and {@link module:list/listui~ListUI list UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class List extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ ListEditing, ListUI ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'List';\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/mediaembed\n */\n\nimport MediaEmbedEditing from './mediaembedediting';\nimport AutoMediaEmbed from './automediaembed';\nimport MediaEmbedUI from './mediaembedui';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\n\nimport '../theme/mediaembed.css';\n\n/**\n * The media embed plugin.\n *\n * For a detailed overview, check the {@glink features/media-embed Media Embed feature documentation}.\n *\n * This is a \"glue\" plugin which loads the following plugins:\n *\n * * The {@link module:media-embed/mediaembedediting~MediaEmbedEditing media embed editing feature},\n * * The {@link module:media-embed/mediaembedui~MediaEmbedUI media embed UI feature} and\n * * The {@link module:media-embed/automediaembed~AutoMediaEmbed auto-media embed feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbed extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ MediaEmbedEditing, MediaEmbedUI, AutoMediaEmbed, Widget ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'MediaEmbed';\n\t}\n}\n\n/**\n * The media embed provider descriptor. Used in\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`} and\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}.\n *\n * See {@link module:media-embed/mediaembed~MediaEmbedConfig} to learn more.\n *\n *\t\t{\n *\t\t\tname: 'example',\n *\n *\t\t\t// The following RegExp matches https://www.example.com/media/{media id},\n *\t\t\t// (either with \"http(s)://\" and \"www\" or without), so the valid URLs are:\n *\t\t\t//\n *\t\t\t// * https://www.example.com/media/{media id},\n *\t\t\t// * http://www.example.com/media/{media id},\n *\t\t\t// * www.example.com/media/{media id},\n *\t\t\t// * example.com/media/{media id}\n *\t\t\turl: /^example\\.com\\/media\\/(\\w+)/,\n *\n *\t\t\t// The rendering function of the provider.\n *\t\t\t// Used to represent the media when editing the content (i.e. in the view)\n *\t\t\t// and also in the data output of the editor if semantic data output is disabled.\n *\t\t\thtml: match => `The HTML representing the media with ID=${ match[ 1 ] }.`\n *\t\t}\n *\n * You can allow any sort of media in the editor using the \"allow–all\" `RegExp`.\n * But mind that, since URLs are processed in the order of configuration, if one of the previous\n * `RegExps` matches the URL, it will have a precedence over this one.\n *\n *\t\t{\n *\t\t\tname: 'allow-all',\n *\t\t\turl: /^.+/\n *\t\t}\n *\n * To implement responsive media, you can use the following HTML structure:\n *\n *\t\t{\n *\t\t\t...\n *\t\t\thtml: match =>\n *\t\t\t\t'<div style=\"position:relative; padding-bottom:100%; height:0\">' +\n *\t\t\t\t\t'<iframe src=\"...\" frameborder=\"0\" ' +\n *\t\t\t\t\t\t'style=\"position:absolute; width:100%; height:100%; top:0; left:0\">' +\n *\t\t\t\t\t'</iframe>' +\n *\t\t\t\t'</div>'\n *\t\t}\n *\n * @typedef {Object} module:media-embed/mediaembed~MediaEmbedProvider\n * @property {String} name The name of the provider. Used e.g. when\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#removeProviders removing providers}.\n * @property {RegExp|Array.<RegExp>} url The `RegExp` object (or array of objects) defining the URL of the media.\n * If any URL matches the `RegExp`, it becomes the media in the editor model, as defined by the provider. The result\n * of matching (output of `String.prototype.match()`) is passed to the `html` rendering function of the media.\n *\n * **Note:** You do not need to include the protocol (`http://`, `https://`) and `www` subdomain in your `RegExps`,\n * they are stripped from the URLs before matching anyway.\n * @property {Function} [html] (optional) The rendering function of the media. The function receives the entire matching\n * array from the corresponding `url` `RegExp` as an argument, allowing rendering a dedicated\n * preview of the media identified by a certain ID or a hash. When not defined, the media embed feature\n * will use a generic media representation in the view and output data.\n * Note that when\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#previewsInData `config.mediaEmbed.previewsInData`}\n * is `true`, the rendering function **will always** be used for the media in the editor data output.\n */\n\n/**\n * The configuration of the {@link module:media-embed/mediaembed~MediaEmbed} feature.\n *\n * Read more in {@link module:media-embed/mediaembed~MediaEmbedConfig}.\n *\n * @member {module:media-embed/mediaembed~MediaEmbedConfig} module:core/editor/editorconfig~EditorConfig#mediaEmbed\n */\n\n/**\n * The configuration of the media embed features.\n *\n * Read more about {@glink features/media-embed#configuration configuring the media embed feature}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\tmediaEmbed: ... // Media embed feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface MediaEmbedConfig\n */\n\n/**\n * The default media providers supported by the editor.\n *\n * The names of providers with rendering functions (previews):\n *\n * * \"dailymotion\",\n * * \"spotify\",\n * * \"youtube\",\n * * \"vimeo\"\n *\n * The names of providers without rendering functions:\n *\n * * \"instagram\",\n * * \"twitter\",\n * * \"googleMaps\",\n * * \"flickr\",\n * * \"facebook\"\n *\n * See the {@link module:media-embed/mediaembed~MediaEmbedProvider provider syntax} to learn more about\n * different kinds of media and media providers.\n *\n * **Note**: The default media provider configuration may not support all possible media URLs,\n * only the most common are included.\n *\n * Media without rendering functions are always represented in the data using the \"semantic\" markup. See\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#previewsInData `config.mediaEmbed.previewsInData`} to\n * learn more about possible data outputs.\n *\n * The priority of media providers corresponds to the order of configuration. The first provider\n * to match the URL is always used, even if there are other providers that support a particular URL.\n * The URL is never matched against the remaining providers.\n *\n * To discard **all** default media providers, simply override this configuration with your own\n * {@link module:media-embed/mediaembed~MediaEmbedProvider definitions}:\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tplugins: [ MediaEmbed, ... ],\n *\t\t\t\tmediaEmbed: {\n *\t\t\t\t\tproviders: [\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\t name: 'myProvider',\n *\t\t\t\t\t\t\t url: /^example\\.com\\/media\\/(\\w+)/,\n *\t\t\t\t\t\t\t html: match => '...'\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t...\n * \t\t\t\t\t]\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * You can take inspiration from the default configuration of this feature which you can find in:\n * https://github.com/ckeditor/ckeditor5-media-embed/blob/master/src/mediaembedediting.js\n *\n * To **extend** the list of default providers, use\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}.\n *\n * To **remove** certain providers, use\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#removeProviders `config.mediaEmbed.removeProviders`}.\n *\n * @member {Array.<module:media-embed/mediaembed~MediaEmbedProvider>} module:media-embed/mediaembed~MediaEmbedConfig#providers\n */\n\n/**\n * The additional media providers supported by the editor. This configuration helps extend the default\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers}.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n *\t\t\t\tplugins: [ MediaEmbed, ... ],\n *\t\t\t\tmediaEmbed: {\n *\t\t\t\t\textraProviders: [\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\t name: 'extraProvider',\n *\t\t\t\t\t\t\t url: /^example\\.com\\/media\\/(\\w+)/,\n *\t\t\t\t\t\t\t html: match => '...'\n *\t\t\t\t\t\t},\n *\t\t\t\t\t\t...\n * \t\t\t\t\t]\n *\t\t\t\t}\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See the {@link module:media-embed/mediaembed~MediaEmbedProvider provider syntax} to learn more.\n *\n * @member {Array.<module:media-embed/mediaembed~MediaEmbedProvider>} module:media-embed/mediaembed~MediaEmbedConfig#extraProviders\n */\n\n/**\n * The list of media providers that should not be used despite being available in\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`} and\n * {@link module:media-embed/mediaembed~MediaEmbedConfig#extraProviders `config.mediaEmbed.extraProviders`}\n *\n *\t\tmediaEmbed: {\n *\t\t\tremoveProviders: [ 'youtube', 'twitter' ]\n *\t\t}\n *\n * @member {Array.<String>} module:media-embed/mediaembed~MediaEmbedConfig#removeProviders\n */\n\n/**\n * Controls the data format produced by the feature.\n *\n * When `false` (default), the feature produces \"semantic\" data, i.e. it does not include the preview of\n * the media, just the `<oembed>` tag with the `url` attribute:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<oembed url=\"https://url\"></oembed>\n *\t\t</figure>\n *\n * When `true`, the media is represented in the output in the same way it looks in the editor,\n * i.e. the media preview is saved to the database:\n *\n *\t\t<figure class=\"media\">\n *\t\t\t<div data-oembed-url=\"https://url\">\n *\t\t\t\t<iframe src=\"https://preview\"></iframe>\n *\t\t\t</div>\n *\t\t</figure>\n *\n * **Note:** Media without preview are always represented in the data using the \"semantic\" markup\n * regardless of the value of the `previewsInData`. Learn more about different kinds of media\n * in the {@link module:media-embed/mediaembed~MediaEmbedConfig#providers `config.mediaEmbed.providers`}\n * configuration description.\n *\n * @member {Boolean} [module:media-embed/mediaembed~MediaEmbedConfig#previewsInData=false]\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/pastefromoffice\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport GoogleDocsNormalizer from './normalizers/googledocsnormalizer';\nimport MSWordNormalizer from './normalizers/mswordnormalizer';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\n\n/**\n * The Paste from Office plugin.\n *\n * This plugin handles content pasted from Office apps and transforms it (if necessary)\n * to a valid structure which can then be understood by the editor features.\n *\n * Transformation is made by a set of predefined {@link module:paste-from-office/normalizer~Normalizer normalizers}.\n * This plugin includes following normalizers:\n * * {@link module:paste-from-office/normalizers/mswordnormalizer~MSWordNormalizer Microsoft Word normalizer}\n * * {@link module:paste-from-office/normalizers/googledocsnormalizer~GoogleDocsNormalizer Google Docs normalizer}\n *\n * For more information about this feature check the {@glink api/paste-from-office package page}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class PasteFromOffice extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'PasteFromOffice';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst normalizers = [];\n\n\t\tnormalizers.push( new MSWordNormalizer() );\n\t\tnormalizers.push( new GoogleDocsNormalizer() );\n\n\t\teditor.plugins.get( 'Clipboard' ).on(\n\t\t\t'inputTransformation',\n\t\t\t( evt, data ) => {\n\t\t\t\tif ( data.isTransformedWithPasteFromOffice ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst htmlString = data.dataTransfer.getData( 'text/html' );\n\t\t\t\tconst activeNormalizer = normalizers.find( normalizer => normalizer.isActive( htmlString ) );\n\n\t\t\t\tif ( activeNormalizer ) {\n\t\t\t\t\tactiveNormalizer.execute( data );\n\n\t\t\t\t\tdata.isTransformedWithPasteFromOffice = true;\n\t\t\t\t}\n\t\t\t},\n\t\t\t{ priority: 'high' }\n\t\t);\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module table/table\n */\n\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\n\nimport TableEditing from './tableediting';\nimport TableUI from './tableui';\nimport Widget from '@ckeditor/ckeditor5-widget/src/widget';\n\nimport '../theme/table.css';\n\n/**\n * The table plugin.\n *\n * For a detailed overview, check the {@glink features/table Table feature documentation}.\n *\n * This is a \"glue\" plugin which loads the {@link module:table/tableediting~TableEditing table editing feature}\n * and {@link module:table/tableui~TableUI table UI feature}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class Table extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ TableEditing, TableUI, Widget ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'Table';\n\t}\n}\n\n/**\n * The configuration of the table features. Used by the table features in the `@ckeditor/ckeditor5-table` package.\n *\n *\t\tClassicEditor\n *\t\t\t.create( editorElement, {\n * \t\t\t\ttable: ... // Table feature options.\n *\t\t\t} )\n *\t\t\t.then( ... )\n *\t\t\t.catch( ... );\n *\n * See {@link module:core/editor/editorconfig~EditorConfig all editor options}.\n *\n * @interface TableConfig\n */\n\n/**\n * The configuration of the {@link module:table/table~Table} feature.\n *\n * Read more in {@link module:table/table~TableConfig}.\n *\n * @member {module:table/table~TableConfig} module:core/editor/editorconfig~EditorConfig#table\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module table/tabletoolbar\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport {\n getSelectedTableWidget,\n getTableWidgetAncestor\n} from './utils';\nimport WidgetToolbarRepository from '@ckeditor/ckeditor5-widget/src/widgettoolbarrepository';\n/**\n * The table toolbar class. It creates toolbars for the table feature and its content (for now only for a table cell content).\n *\n * Table toolbar shows up when a table widget is selected. Its components (e.g. buttons) are created based on the\n * {@link module:table/table~TableConfig#tableToolbar `table.tableToolbar` configuration option}.\n *\n * Table content toolbar shows up when the selection is inside the content of a table. It creates its component based on the\n * {@link module:table/table~TableConfig#contentToolbar `table.contentToolbar` configuration option}.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class TableToolbar extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [WidgetToolbarRepository];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'TableToolbar';\n }\n /**\n\t * @inheritDoc\n\t */\n afterInit() {\n const editor = this.editor;\n const t = editor.t;\n const widgetToolbarRepository = editor.plugins.get(WidgetToolbarRepository);\n const tableContentToolbarItems = editor.config.get('table.contentToolbar');\n const tableToolbarItems = editor.config.get('table.tableToolbar');\n if (tableContentToolbarItems) {\n widgetToolbarRepository.register('tableContent', {\n ariaLabel: t('c'),\n items: tableContentToolbarItems,\n getRelatedElement: getTableWidgetAncestor\n });\n }\n if (tableToolbarItems) {\n widgetToolbarRepository.register('table', {\n ariaLabel: t('c'),\n items: tableToolbarItems,\n getRelatedElement: getSelectedTableWidget\n });\n }\n }\n} /**\n * Items to be placed in the table content toolbar.\n * The {@link module:table/tabletoolbar~TableToolbar} plugin is required to make this toolbar working.\n *\n * Assuming that you use the {@link module:table/tableui~TableUI} feature, the following toolbar items will be available\n * in {@link module:ui/componentfactory~ComponentFactory}:\n *\n * * `'tableRow'`,\n * * `'tableColumn'`,\n * * `'mergeTableCells'`.\n *\n * You can thus configure the toolbar like this:\n *\n *\t\tconst tableConfig = {\n *\t\t\tcontentToolbar: [ 'tableRow', 'tableColumn', 'mergeTableCells' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:table/table~TableConfig#contentToolbar\n */\n /**\n * Items to be placed in the table toolbar.\n * The {@link module:table/tabletoolbar~TableToolbar} plugin is required to make this toolbar working.\n *\n * You can thus configure the toolbar like this:\n *\n *\t\tconst tableConfig = {\n *\t\t\ttableToolbar: [ 'blockQuote' ]\n *\t\t};\n *\n * Of course, the same buttons can also be used in the\n * {@link module:core/editor/editorconfig~EditorConfig#toolbar main editor toolbar}.\n *\n * Read more about configuring toolbar in {@link module:core/editor/editorconfig~EditorConfig#toolbar}.\n *\n * @member {Array.<String>} module:table/table~TableConfig#tableToolbar\n */","import arrayWithoutHoles from \"./arrayWithoutHoles\";\nimport iterableToArray from \"./iterableToArray\";\nimport nonIterableSpread from \"./nonIterableSpread\";\nexport default function _toConsumableArray(arr) {\n return arrayWithoutHoles(arr) || iterableToArray(arr) || nonIterableSpread();\n}","export default function _arrayWithoutHoles(arr) {\n if (Array.isArray(arr)) {\n for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) {\n arr2[i] = arr[i];\n }\n\n return arr2;\n }\n}","export default function _iterableToArray(iter) {\n if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter);\n}","export default function _nonIterableSpread() {\n throw new TypeError(\"Invalid attempt to spread non-iterable instance\");\n}","/** @license React v16.12.0\n * react.production.min.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';var h=require(\"object-assign\"),n=\"function\"===typeof 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MIT\n*/\n'use strict';var aa=require(\"react\"),n=require(\"object-assign\"),q=require(\"scheduler\");function u(a){for(var b=\"https://reactjs.org/docs/error-decoder.html?invariant=\"+a,c=1;c<arguments.length;c++)b+=\"&args[]=\"+encodeURIComponent(arguments[c]);return\"Minified React error #\"+a+\"; visit \"+b+\" for the full message or use the non-minified dev environment for full errors and additional helpful warnings.\"}if(!aa)throw Error(u(227));var ba=null,ca={};\nfunction da(){if(ba)for(var a in ca){var b=ca[a],c=ba.indexOf(a);if(!(-1<c))throw Error(u(96,a));if(!ea[c]){if(!b.extractEvents)throw Error(u(97,a));ea[c]=b;c=b.eventTypes;for(var d in c){var e=void 0;var f=c[d],g=b,h=d;if(fa.hasOwnProperty(h))throw Error(u(99,h));fa[h]=f;var k=f.phasedRegistrationNames;if(k){for(e in k)k.hasOwnProperty(e)&&ha(k[e],g,h);e=!0}else f.registrationName?(ha(f.registrationName,g,h),e=!0):e=!1;if(!e)throw Error(u(98,d,a));}}}}\nfunction ha(a,b,c){if(ia[a])throw 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Symbol : {};\n var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n function wrap(innerFn, outerFn, self, tryLocsList) {\n // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n var generator = Object.create(protoGenerator.prototype);\n var context = new Context(tryLocsList || []);\n\n // The ._invoke method unifies the implementations of the .next,\n // .throw, and .return methods.\n generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n return generator;\n }\n exports.wrap = wrap;\n\n // Try/catch helper to minimize deoptimizations. Returns a completion\n // record like context.tryEntries[i].completion. This interface could\n // have been (and was previously) designed to take a closure to be\n // invoked without arguments, but in all the cases we care about we\n // already have an existing method we want to call, so there's no need\n // to create a new function object. We can even get away with assuming\n // the method takes exactly one argument, since that happens to be true\n // in every case, so we don't have to touch the arguments object. The\n // only additional allocation required is the completion record, which\n // has a stable shape and so hopefully should be cheap to allocate.\n function tryCatch(fn, obj, arg) {\n try {\n return { type: \"normal\", arg: fn.call(obj, arg) };\n } catch (err) {\n return { type: \"throw\", arg: err };\n }\n }\n\n var GenStateSuspendedStart = \"suspendedStart\";\n var GenStateSuspendedYield = \"suspendedYield\";\n var GenStateExecuting = \"executing\";\n var GenStateCompleted = \"completed\";\n\n // Returning this object from the innerFn has the same effect as\n // breaking out of the dispatch switch statement.\n var ContinueSentinel = {};\n\n // Dummy constructor functions that we use as the .constructor and\n // .constructor.prototype properties for functions that return Generator\n // objects. For full spec compliance, you may wish to configure your\n // minifier not to mangle the names of these two functions.\n function Generator() {}\n function GeneratorFunction() {}\n function GeneratorFunctionPrototype() {}\n\n // This is a polyfill for %IteratorPrototype% for environments that\n // don't natively support it.\n var IteratorPrototype = {};\n IteratorPrototype[iteratorSymbol] = function () {\n return this;\n };\n\n var getProto = Object.getPrototypeOf;\n var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n if (NativeIteratorPrototype &&\n NativeIteratorPrototype !== Op &&\n hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n // This environment has a native %IteratorPrototype%; use it instead\n // of the polyfill.\n IteratorPrototype = NativeIteratorPrototype;\n }\n\n var Gp = GeneratorFunctionPrototype.prototype =\n Generator.prototype = Object.create(IteratorPrototype);\n GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n GeneratorFunctionPrototype.constructor = GeneratorFunction;\n GeneratorFunctionPrototype[toStringTagSymbol] =\n GeneratorFunction.displayName = \"GeneratorFunction\";\n\n // Helper for defining the .next, .throw, and .return methods of the\n // Iterator interface in terms of a single ._invoke method.\n function defineIteratorMethods(prototype) {\n [\"next\", \"throw\", \"return\"].forEach(function(method) {\n prototype[method] = function(arg) {\n return this._invoke(method, arg);\n };\n });\n }\n\n exports.isGeneratorFunction = function(genFun) {\n var ctor = typeof genFun === \"function\" && genFun.constructor;\n return ctor\n ? ctor === GeneratorFunction ||\n // For the native GeneratorFunction constructor, the best we can\n // do is to check its .name property.\n (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n : false;\n };\n\n exports.mark = function(genFun) {\n if (Object.setPrototypeOf) {\n Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n } else {\n genFun.__proto__ = GeneratorFunctionPrototype;\n if (!(toStringTagSymbol in genFun)) {\n genFun[toStringTagSymbol] = \"GeneratorFunction\";\n }\n }\n genFun.prototype = Object.create(Gp);\n return genFun;\n };\n\n // Within the body of any async function, `await x` is transformed to\n // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n // meant to be awaited.\n exports.awrap = function(arg) {\n return { __await: arg };\n };\n\n function AsyncIterator(generator) {\n function invoke(method, arg, resolve, reject) {\n var record = tryCatch(generator[method], generator, arg);\n if (record.type === \"throw\") {\n reject(record.arg);\n } else {\n var result = record.arg;\n var value = result.value;\n if (value &&\n typeof value === \"object\" &&\n hasOwn.call(value, \"__await\")) {\n return Promise.resolve(value.__await).then(function(value) {\n invoke(\"next\", value, resolve, reject);\n }, function(err) {\n invoke(\"throw\", err, resolve, reject);\n });\n }\n\n return Promise.resolve(value).then(function(unwrapped) {\n // When a yielded Promise is resolved, its final value becomes\n // the .value of the Promise<{value,done}> result for the\n // current iteration.\n result.value = unwrapped;\n resolve(result);\n }, function(error) {\n // If a rejected Promise was yielded, throw the rejection back\n // into the async generator function so it can be handled there.\n return invoke(\"throw\", error, resolve, reject);\n });\n }\n }\n\n var previousPromise;\n\n function enqueue(method, arg) {\n function callInvokeWithMethodAndArg() {\n return new Promise(function(resolve, reject) {\n invoke(method, arg, resolve, reject);\n });\n }\n\n return previousPromise =\n // If enqueue has been called before, then we want to wait until\n // all previous Promises have been resolved before calling invoke,\n // so that results are always delivered in the correct order. If\n // enqueue has not been called before, then it is important to\n // call invoke immediately, without waiting on a callback to fire,\n // so that the async generator function has the opportunity to do\n // any necessary setup in a predictable way. This predictability\n // is why the Promise constructor synchronously invokes its\n // executor callback, and why async functions synchronously\n // execute code before the first await. Since we implement simple\n // async functions in terms of async generators, it is especially\n // important to get this right, even though it requires care.\n previousPromise ? previousPromise.then(\n callInvokeWithMethodAndArg,\n // Avoid propagating failures to Promises returned by later\n // invocations of the iterator.\n callInvokeWithMethodAndArg\n ) : callInvokeWithMethodAndArg();\n }\n\n // Define the unified helper method that is used to implement .next,\n // .throw, and .return (see defineIteratorMethods).\n this._invoke = enqueue;\n }\n\n defineIteratorMethods(AsyncIterator.prototype);\n AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n return this;\n };\n exports.AsyncIterator = AsyncIterator;\n\n // Note that simple async functions are implemented on top of\n // AsyncIterator objects; they just return a Promise for the value of\n // the final result produced by the iterator.\n exports.async = function(innerFn, outerFn, self, tryLocsList) {\n var iter = new AsyncIterator(\n wrap(innerFn, outerFn, self, tryLocsList)\n );\n\n return exports.isGeneratorFunction(outerFn)\n ? iter // If outerFn is a generator, return the full iterator.\n : iter.next().then(function(result) {\n return result.done ? result.value : iter.next();\n });\n };\n\n function makeInvokeMethod(innerFn, self, context) {\n var state = GenStateSuspendedStart;\n\n return function invoke(method, arg) {\n if (state === GenStateExecuting) {\n throw new Error(\"Generator is already running\");\n }\n\n if (state === GenStateCompleted) {\n if (method === \"throw\") {\n throw arg;\n }\n\n // Be forgiving, per 25.3.3.3.3 of the spec:\n // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n return doneResult();\n }\n\n context.method = method;\n context.arg = arg;\n\n while (true) {\n var delegate = context.delegate;\n if (delegate) {\n var delegateResult = maybeInvokeDelegate(delegate, context);\n if (delegateResult) {\n if (delegateResult === ContinueSentinel) continue;\n return delegateResult;\n }\n }\n\n if (context.method === \"next\") {\n // Setting context._sent for legacy support of Babel's\n // function.sent implementation.\n context.sent = context._sent = context.arg;\n\n } else if (context.method === \"throw\") {\n if (state === GenStateSuspendedStart) {\n state = GenStateCompleted;\n throw context.arg;\n }\n\n context.dispatchException(context.arg);\n\n } else if (context.method === \"return\") {\n context.abrupt(\"return\", context.arg);\n }\n\n state = GenStateExecuting;\n\n var record = tryCatch(innerFn, self, context);\n if (record.type === \"normal\") {\n // If an exception is thrown from innerFn, we leave state ===\n // GenStateExecuting and loop back for another invocation.\n state = context.done\n ? GenStateCompleted\n : GenStateSuspendedYield;\n\n if (record.arg === ContinueSentinel) {\n continue;\n }\n\n return {\n value: record.arg,\n done: context.done\n };\n\n } else if (record.type === \"throw\") {\n state = GenStateCompleted;\n // Dispatch the exception by looping back around to the\n // context.dispatchException(context.arg) call above.\n context.method = \"throw\";\n context.arg = record.arg;\n }\n }\n };\n }\n\n // Call delegate.iterator[context.method](context.arg) and handle the\n // result, either by returning a { value, done } result from the\n // delegate iterator, or by modifying context.method and context.arg,\n // setting context.delegate to null, and returning the ContinueSentinel.\n function maybeInvokeDelegate(delegate, context) {\n var method = delegate.iterator[context.method];\n if (method === undefined) {\n // A .throw or .return when the delegate iterator has no .throw\n // method always terminates the yield* loop.\n context.delegate = null;\n\n if (context.method === \"throw\") {\n // Note: [\"return\"] must be used for ES3 parsing compatibility.\n if (delegate.iterator[\"return\"]) {\n // If the delegate iterator has a return method, give it a\n // chance to clean up.\n context.method = \"return\";\n context.arg = undefined;\n maybeInvokeDelegate(delegate, context);\n\n if (context.method === \"throw\") {\n // If maybeInvokeDelegate(context) changed context.method from\n // \"return\" to \"throw\", let that override the TypeError below.\n return ContinueSentinel;\n }\n }\n\n context.method = \"throw\";\n context.arg = new TypeError(\n \"The iterator does not provide a 'throw' method\");\n }\n\n return ContinueSentinel;\n }\n\n var record = tryCatch(method, delegate.iterator, context.arg);\n\n if (record.type === \"throw\") {\n context.method = \"throw\";\n context.arg = record.arg;\n context.delegate = null;\n return ContinueSentinel;\n }\n\n var info = record.arg;\n\n if (! info) {\n context.method = \"throw\";\n context.arg = new TypeError(\"iterator result is not an object\");\n context.delegate = null;\n return ContinueSentinel;\n }\n\n if (info.done) {\n // Assign the result of the finished delegate to the temporary\n // variable specified by delegate.resultName (see delegateYield).\n context[delegate.resultName] = info.value;\n\n // Resume execution at the desired location (see delegateYield).\n context.next = delegate.nextLoc;\n\n // If context.method was \"throw\" but the delegate handled the\n // exception, let the outer generator proceed normally. If\n // context.method was \"next\", forget context.arg since it has been\n // \"consumed\" by the delegate iterator. If context.method was\n // \"return\", allow the original .return call to continue in the\n // outer generator.\n if (context.method !== \"return\") {\n context.method = \"next\";\n context.arg = undefined;\n }\n\n } else {\n // Re-yield the result returned by the delegate method.\n return info;\n }\n\n // The delegate iterator is finished, so forget it and continue with\n // the outer generator.\n context.delegate = null;\n return ContinueSentinel;\n }\n\n // Define Generator.prototype.{next,throw,return} in terms of the\n // unified ._invoke helper method.\n defineIteratorMethods(Gp);\n\n Gp[toStringTagSymbol] = \"Generator\";\n\n // A Generator should always return itself as the iterator object when the\n // @@iterator function is called on it. Some browsers' implementations of the\n // iterator prototype chain incorrectly implement this, causing the Generator\n // object to not be returned from this call. This ensures that doesn't happen.\n // See https://github.com/facebook/regenerator/issues/274 for more details.\n Gp[iteratorSymbol] = function() {\n return this;\n };\n\n Gp.toString = function() {\n return \"[object Generator]\";\n };\n\n function pushTryEntry(locs) {\n var entry = { tryLoc: locs[0] };\n\n if (1 in locs) {\n entry.catchLoc = locs[1];\n }\n\n if (2 in locs) {\n entry.finallyLoc = locs[2];\n entry.afterLoc = locs[3];\n }\n\n this.tryEntries.push(entry);\n }\n\n function resetTryEntry(entry) {\n var record = entry.completion || {};\n record.type = \"normal\";\n delete record.arg;\n entry.completion = record;\n }\n\n function Context(tryLocsList) {\n // The root entry object (effectively a try statement without a catch\n // or a finally block) gives us a place to store values thrown from\n // locations where there is no enclosing try statement.\n this.tryEntries = [{ tryLoc: \"root\" }];\n tryLocsList.forEach(pushTryEntry, this);\n this.reset(true);\n }\n\n exports.keys = function(object) {\n var keys = [];\n for (var key in object) {\n keys.push(key);\n }\n keys.reverse();\n\n // Rather than returning an object with a next method, we keep\n // things simple and return the next function itself.\n return function next() {\n while (keys.length) {\n var key = keys.pop();\n if (key in object) {\n next.value = key;\n next.done = false;\n return next;\n }\n }\n\n // To avoid creating an additional object, we just hang the .value\n // and .done properties off the next function object itself. This\n // also ensures that the minifier will not anonymize the function.\n next.done = true;\n return next;\n };\n };\n\n function values(iterable) {\n if (iterable) {\n var iteratorMethod = iterable[iteratorSymbol];\n if (iteratorMethod) {\n return iteratorMethod.call(iterable);\n }\n\n if (typeof iterable.next === \"function\") {\n return iterable;\n }\n\n if (!isNaN(iterable.length)) {\n var i = -1, next = function next() {\n while (++i < iterable.length) {\n if (hasOwn.call(iterable, i)) {\n next.value = iterable[i];\n next.done = false;\n return next;\n }\n }\n\n next.value = undefined;\n next.done = true;\n\n return next;\n };\n\n return next.next = next;\n }\n }\n\n // Return an iterator with no values.\n return { next: doneResult };\n }\n exports.values = values;\n\n function doneResult() {\n return { value: undefined, done: true };\n }\n\n Context.prototype = {\n constructor: Context,\n\n reset: function(skipTempReset) {\n this.prev = 0;\n this.next = 0;\n // Resetting context._sent for legacy support of Babel's\n // function.sent implementation.\n this.sent = this._sent = undefined;\n this.done = false;\n this.delegate = null;\n\n this.method = \"next\";\n this.arg = undefined;\n\n this.tryEntries.forEach(resetTryEntry);\n\n if (!skipTempReset) {\n for (var name in this) {\n // Not sure about the optimal order of these conditions:\n if (name.charAt(0) === \"t\" &&\n hasOwn.call(this, name) &&\n !isNaN(+name.slice(1))) {\n this[name] = undefined;\n }\n }\n }\n },\n\n stop: function() {\n this.done = true;\n\n var rootEntry = this.tryEntries[0];\n var rootRecord = rootEntry.completion;\n if (rootRecord.type === \"throw\") {\n throw rootRecord.arg;\n }\n\n return this.rval;\n },\n\n dispatchException: function(exception) {\n if (this.done) {\n throw exception;\n }\n\n var context = this;\n function handle(loc, caught) {\n record.type = \"throw\";\n record.arg = exception;\n context.next = loc;\n\n if (caught) {\n // If the dispatched exception was caught by a catch block,\n // then let that catch block handle the exception normally.\n context.method = \"next\";\n context.arg = undefined;\n }\n\n return !! caught;\n }\n\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n var record = entry.completion;\n\n if (entry.tryLoc === \"root\") {\n // Exception thrown outside of any try block that could handle\n // it, so set the completion value of the entire function to\n // throw the exception.\n return handle(\"end\");\n }\n\n if (entry.tryLoc <= this.prev) {\n var hasCatch = hasOwn.call(entry, \"catchLoc\");\n var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n if (hasCatch && hasFinally) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n } else if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else if (hasCatch) {\n if (this.prev < entry.catchLoc) {\n return handle(entry.catchLoc, true);\n }\n\n } else if (hasFinally) {\n if (this.prev < entry.finallyLoc) {\n return handle(entry.finallyLoc);\n }\n\n } else {\n throw new Error(\"try statement without catch or finally\");\n }\n }\n }\n },\n\n abrupt: function(type, arg) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.tryLoc <= this.prev &&\n hasOwn.call(entry, \"finallyLoc\") &&\n this.prev < entry.finallyLoc) {\n var finallyEntry = entry;\n break;\n }\n }\n\n if (finallyEntry &&\n (type === \"break\" ||\n type === \"continue\") &&\n finallyEntry.tryLoc <= arg &&\n arg <= finallyEntry.finallyLoc) {\n // Ignore the finally entry if control is not jumping to a\n // location outside the try/catch block.\n finallyEntry = null;\n }\n\n var record = finallyEntry ? finallyEntry.completion : {};\n record.type = type;\n record.arg = arg;\n\n if (finallyEntry) {\n this.method = \"next\";\n this.next = finallyEntry.finallyLoc;\n return ContinueSentinel;\n }\n\n return this.complete(record);\n },\n\n complete: function(record, afterLoc) {\n if (record.type === \"throw\") {\n throw record.arg;\n }\n\n if (record.type === \"break\" ||\n record.type === \"continue\") {\n this.next = record.arg;\n } else if (record.type === \"return\") {\n this.rval = this.arg = record.arg;\n this.method = \"return\";\n this.next = \"end\";\n } else if (record.type === \"normal\" && afterLoc) {\n this.next = afterLoc;\n }\n\n return ContinueSentinel;\n },\n\n finish: function(finallyLoc) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.finallyLoc === finallyLoc) {\n this.complete(entry.completion, entry.afterLoc);\n resetTryEntry(entry);\n return ContinueSentinel;\n }\n }\n },\n\n \"catch\": function(tryLoc) {\n for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n var entry = this.tryEntries[i];\n if (entry.tryLoc === tryLoc) {\n var record = entry.completion;\n if (record.type === \"throw\") {\n var thrown = record.arg;\n resetTryEntry(entry);\n }\n return thrown;\n }\n }\n\n // The context.catch method must only be called with a location\n // argument that corresponds to a known catch block.\n throw new Error(\"illegal catch attempt\");\n },\n\n delegateYield: function(iterable, resultName, nextLoc) {\n this.delegate = {\n iterator: values(iterable),\n resultName: resultName,\n nextLoc: nextLoc\n };\n\n if (this.method === \"next\") {\n // Deliberately forget the last sent value so that we don't\n // accidentally pass it on to the delegate.\n this.arg = undefined;\n }\n\n return ContinueSentinel;\n }\n };\n\n // Regardless of whether this script is executing as a CommonJS module\n // or not, return the runtime object so that we can declare the variable\n // regeneratorRuntime in the outer scope, which allows this module to be\n // injected easily by `bin/regenerator --include-runtime script.js`.\n return exports;\n\n}(\n // If this script is executing as a CommonJS module, use module.exports\n // as the regeneratorRuntime namespace. Otherwise create a new empty\n // object. Either way, the resulting object will be used to initialize\n // the regeneratorRuntime variable at the top of this file.\n typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n // This module should not be running in strict mode, so the above\n // assignment should always work unless something is misconfigured. Just\n // in case runtime.js accidentally runs in strict mode, we can escape\n // strict mode using a global Function call. This could conceivably fail\n // if a Content Security Policy forbids using Function, but in that case\n // the proper solution is to fix the accidental strict mode problem. If\n // you've misconfigured your bundler to force strict mode and applied a\n // CSP to forbid Function, and you're not willing to fix either of those\n // problems, please detail your unique predicament in a GitHub issue.\n Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","/*!\n * jQuery JavaScript Library v3.4.1\n * https://jquery.com/\n *\n * Includes Sizzle.js\n * https://sizzlejs.com/\n *\n * Copyright JS Foundation and other contributors\n * Released under the MIT license\n * https://jquery.org/license\n *\n * Date: 2019-05-01T21:04Z\n */\n( function( global, factory ) {\n\n\t\"use strict\";\n\n\tif ( typeof module === \"object\" && typeof module.exports === \"object\" ) {\n\n\t\t// For CommonJS and CommonJS-like environments where a proper `window`\n\t\t// is present, execute the factory and get jQuery.\n\t\t// For environments that do not have a `window` with a `document`\n\t\t// (such as Node.js), expose a factory as module.exports.\n\t\t// This accentuates the need for the creation of a real `window`.\n\t\t// e.g. var jQuery = require(\"jquery\")(window);\n\t\t// See ticket #14549 for more info.\n\t\tmodule.exports = global.document ?\n\t\t\tfactory( global, true ) :\n\t\t\tfunction( w ) {\n\t\t\t\tif ( !w.document ) {\n\t\t\t\t\tthrow new Error( \"jQuery requires a window with a document\" );\n\t\t\t\t}\n\t\t\t\treturn factory( w );\n\t\t\t};\n\t} else {\n\t\tfactory( global );\n\t}\n\n// Pass this if window is not defined yet\n} )( typeof window !== \"undefined\" ? window : this, function( window, noGlobal ) {\n\n// Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1\n// throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode\n// arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common\n// enough that all such attempts are guarded in a try block.\n\"use strict\";\n\nvar arr = [];\n\nvar document = window.document;\n\nvar getProto = Object.getPrototypeOf;\n\nvar slice = arr.slice;\n\nvar concat = arr.concat;\n\nvar push = arr.push;\n\nvar indexOf = arr.indexOf;\n\nvar class2type = {};\n\nvar toString = class2type.toString;\n\nvar hasOwn = class2type.hasOwnProperty;\n\nvar fnToString = hasOwn.toString;\n\nvar ObjectFunctionString = fnToString.call( Object );\n\nvar support = {};\n\nvar isFunction = function isFunction( obj ) {\n\n // Support: Chrome <=57, Firefox <=52\n // In some browsers, typeof returns \"function\" for HTML <object> elements\n // (i.e., `typeof document.createElement( \"object\" ) === \"function\"`).\n // We don't want to classify *any* DOM node as a function.\n return typeof obj === \"function\" && typeof obj.nodeType !== \"number\";\n };\n\n\nvar isWindow = function isWindow( obj ) {\n\t\treturn obj != null && obj === obj.window;\n\t};\n\n\n\n\n\tvar preservedScriptAttributes = {\n\t\ttype: true,\n\t\tsrc: true,\n\t\tnonce: true,\n\t\tnoModule: true\n\t};\n\n\tfunction DOMEval( code, node, doc ) {\n\t\tdoc = doc || document;\n\n\t\tvar i, val,\n\t\t\tscript = doc.createElement( \"script\" );\n\n\t\tscript.text = code;\n\t\tif ( node ) {\n\t\t\tfor ( i in preservedScriptAttributes ) {\n\n\t\t\t\t// Support: Firefox 64+, Edge 18+\n\t\t\t\t// Some browsers don't support the \"nonce\" property on scripts.\n\t\t\t\t// On the other hand, just using `getAttribute` is not enough as\n\t\t\t\t// the `nonce` attribute is reset to an empty string whenever it\n\t\t\t\t// becomes browsing-context connected.\n\t\t\t\t// See https://github.com/whatwg/html/issues/2369\n\t\t\t\t// See https://html.spec.whatwg.org/#nonce-attributes\n\t\t\t\t// The `node.getAttribute` check was added for the sake of\n\t\t\t\t// `jQuery.globalEval` so that it can fake a nonce-containing node\n\t\t\t\t// via an object.\n\t\t\t\tval = node[ i ] || node.getAttribute && node.getAttribute( i );\n\t\t\t\tif ( val ) {\n\t\t\t\t\tscript.setAttribute( i, val );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tdoc.head.appendChild( script ).parentNode.removeChild( script );\n\t}\n\n\nfunction toType( obj ) {\n\tif ( obj == null ) {\n\t\treturn obj + \"\";\n\t}\n\n\t// Support: Android <=2.3 only (functionish RegExp)\n\treturn typeof obj === \"object\" || typeof obj === \"function\" ?\n\t\tclass2type[ toString.call( obj ) ] || \"object\" :\n\t\ttypeof obj;\n}\n/* global Symbol */\n// Defining this global in .eslintrc.json would create a danger of using the global\n// unguarded in another place, it seems safer to define global only for this module\n\n\n\nvar\n\tversion = \"3.4.1\",\n\n\t// Define a local copy of jQuery\n\tjQuery = function( selector, context ) {\n\n\t\t// The jQuery object is actually just the init constructor 'enhanced'\n\t\t// Need init if jQuery is called (just allow error to be thrown if not included)\n\t\treturn new jQuery.fn.init( selector, context );\n\t},\n\n\t// Support: Android <=4.0 only\n\t// Make sure we trim BOM and NBSP\n\trtrim = /^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g;\n\njQuery.fn = jQuery.prototype = {\n\n\t// The current version of jQuery being used\n\tjquery: version,\n\n\tconstructor: jQuery,\n\n\t// The default length of a jQuery object is 0\n\tlength: 0,\n\n\ttoArray: function() {\n\t\treturn slice.call( this );\n\t},\n\n\t// Get the Nth element in the matched element set OR\n\t// Get the whole matched element set as a clean array\n\tget: function( num ) {\n\n\t\t// Return all the elements in a clean array\n\t\tif ( num == null ) {\n\t\t\treturn slice.call( this );\n\t\t}\n\n\t\t// Return just the one element from the set\n\t\treturn num < 0 ? this[ num + this.length ] : this[ num ];\n\t},\n\n\t// Take an array of elements and push it onto the stack\n\t// (returning the new matched element set)\n\tpushStack: function( elems ) {\n\n\t\t// Build a new jQuery matched element set\n\t\tvar ret = jQuery.merge( this.constructor(), elems );\n\n\t\t// Add the old object onto the stack (as a reference)\n\t\tret.prevObject = this;\n\n\t\t// Return the newly-formed element set\n\t\treturn ret;\n\t},\n\n\t// Execute a callback for every element in the matched set.\n\teach: function( callback ) {\n\t\treturn jQuery.each( this, callback );\n\t},\n\n\tmap: function( callback ) {\n\t\treturn this.pushStack( jQuery.map( this, function( elem, i ) {\n\t\t\treturn callback.call( elem, i, elem );\n\t\t} ) );\n\t},\n\n\tslice: function() {\n\t\treturn this.pushStack( slice.apply( this, arguments ) );\n\t},\n\n\tfirst: function() {\n\t\treturn this.eq( 0 );\n\t},\n\n\tlast: function() {\n\t\treturn this.eq( -1 );\n\t},\n\n\teq: function( i ) {\n\t\tvar len = this.length,\n\t\t\tj = +i + ( i < 0 ? len : 0 );\n\t\treturn this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );\n\t},\n\n\tend: function() {\n\t\treturn this.prevObject || this.constructor();\n\t},\n\n\t// For internal use only.\n\t// Behaves like an Array's method, not like a jQuery method.\n\tpush: push,\n\tsort: arr.sort,\n\tsplice: arr.splice\n};\n\njQuery.extend = jQuery.fn.extend = function() {\n\tvar options, name, src, copy, copyIsArray, clone,\n\t\ttarget = arguments[ 0 ] || {},\n\t\ti = 1,\n\t\tlength = arguments.length,\n\t\tdeep = false;\n\n\t// Handle a deep copy situation\n\tif ( typeof target === \"boolean\" ) {\n\t\tdeep = target;\n\n\t\t// Skip the boolean and the target\n\t\ttarget = arguments[ i ] || {};\n\t\ti++;\n\t}\n\n\t// Handle case when target is a string or something (possible in deep copy)\n\tif ( typeof target !== \"object\" && !isFunction( target ) ) {\n\t\ttarget = {};\n\t}\n\n\t// Extend jQuery itself if only one argument is passed\n\tif ( i === length ) {\n\t\ttarget = this;\n\t\ti--;\n\t}\n\n\tfor ( ; i < length; i++ ) {\n\n\t\t// Only deal with non-null/undefined values\n\t\tif ( ( options = arguments[ i ] ) != null ) {\n\n\t\t\t// Extend the base object\n\t\t\tfor ( name in options ) {\n\t\t\t\tcopy = options[ name ];\n\n\t\t\t\t// Prevent Object.prototype pollution\n\t\t\t\t// Prevent never-ending loop\n\t\t\t\tif ( name === \"__proto__\" || target === copy ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\t// Recurse if we're merging plain objects or arrays\n\t\t\t\tif ( deep && copy && ( jQuery.isPlainObject( copy ) ||\n\t\t\t\t\t( copyIsArray = Array.isArray( copy ) ) ) ) {\n\t\t\t\t\tsrc = target[ name ];\n\n\t\t\t\t\t// Ensure proper type for the source value\n\t\t\t\t\tif ( copyIsArray && !Array.isArray( src ) ) {\n\t\t\t\t\t\tclone = [];\n\t\t\t\t\t} else if ( !copyIsArray && !jQuery.isPlainObject( src ) ) {\n\t\t\t\t\t\tclone = {};\n\t\t\t\t\t} else {\n\t\t\t\t\t\tclone = src;\n\t\t\t\t\t}\n\t\t\t\t\tcopyIsArray = false;\n\n\t\t\t\t\t// Never move original objects, clone them\n\t\t\t\t\ttarget[ name ] = jQuery.extend( deep, clone, copy );\n\n\t\t\t\t// Don't bring in undefined values\n\t\t\t\t} else if ( copy !== undefined ) {\n\t\t\t\t\ttarget[ name ] = copy;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Return the modified object\n\treturn target;\n};\n\njQuery.extend( {\n\n\t// Unique for each copy of jQuery on the page\n\texpando: \"jQuery\" + ( version + Math.random() ).replace( /\\D/g, \"\" ),\n\n\t// Assume jQuery is ready without the ready module\n\tisReady: true,\n\n\terror: function( msg ) {\n\t\tthrow new Error( msg );\n\t},\n\n\tnoop: function() {},\n\n\tisPlainObject: function( obj ) {\n\t\tvar proto, Ctor;\n\n\t\t// Detect obvious negatives\n\t\t// Use toString instead of jQuery.type to catch host objects\n\t\tif ( !obj || toString.call( obj ) !== \"[object Object]\" ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tproto = getProto( obj );\n\n\t\t// Objects with no prototype (e.g., `Object.create( null )`) are plain\n\t\tif ( !proto ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Objects with prototype are plain iff they were constructed by a global Object function\n\t\tCtor = hasOwn.call( proto, \"constructor\" ) && proto.constructor;\n\t\treturn typeof Ctor === \"function\" && fnToString.call( Ctor ) === ObjectFunctionString;\n\t},\n\n\tisEmptyObject: function( obj ) {\n\t\tvar name;\n\n\t\tfor ( name in obj ) {\n\t\t\treturn false;\n\t\t}\n\t\treturn true;\n\t},\n\n\t// Evaluates a script in a global context\n\tglobalEval: function( code, options ) {\n\t\tDOMEval( code, { nonce: options && options.nonce } );\n\t},\n\n\teach: function( obj, callback ) {\n\t\tvar length, i = 0;\n\n\t\tif ( isArrayLike( obj ) ) {\n\t\t\tlength = obj.length;\n\t\t\tfor ( ; i < length; i++ ) {\n\t\t\t\tif ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tfor ( i in obj ) {\n\t\t\t\tif ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn obj;\n\t},\n\n\t// Support: Android <=4.0 only\n\ttrim: function( text ) {\n\t\treturn text == null ?\n\t\t\t\"\" :\n\t\t\t( text + \"\" ).replace( rtrim, \"\" );\n\t},\n\n\t// results is for internal usage only\n\tmakeArray: function( arr, results ) {\n\t\tvar ret = results || [];\n\n\t\tif ( arr != null ) {\n\t\t\tif ( isArrayLike( Object( arr ) ) ) {\n\t\t\t\tjQuery.merge( ret,\n\t\t\t\t\ttypeof arr === \"string\" ?\n\t\t\t\t\t[ arr ] : arr\n\t\t\t\t);\n\t\t\t} else {\n\t\t\t\tpush.call( ret, arr );\n\t\t\t}\n\t\t}\n\n\t\treturn ret;\n\t},\n\n\tinArray: function( elem, arr, i ) {\n\t\treturn arr == null ? -1 : indexOf.call( arr, elem, i );\n\t},\n\n\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t// push.apply(_, arraylike) throws on ancient WebKit\n\tmerge: function( first, second ) {\n\t\tvar len = +second.length,\n\t\t\tj = 0,\n\t\t\ti = first.length;\n\n\t\tfor ( ; j < len; j++ ) {\n\t\t\tfirst[ i++ ] = second[ j ];\n\t\t}\n\n\t\tfirst.length = i;\n\n\t\treturn first;\n\t},\n\n\tgrep: function( elems, callback, invert ) {\n\t\tvar callbackInverse,\n\t\t\tmatches = [],\n\t\t\ti = 0,\n\t\t\tlength = elems.length,\n\t\t\tcallbackExpect = !invert;\n\n\t\t// Go through the array, only saving the items\n\t\t// that pass the validator function\n\t\tfor ( ; i < length; i++ ) {\n\t\t\tcallbackInverse = !callback( elems[ i ], i );\n\t\t\tif ( callbackInverse !== callbackExpect ) {\n\t\t\t\tmatches.push( elems[ i ] );\n\t\t\t}\n\t\t}\n\n\t\treturn matches;\n\t},\n\n\t// arg is for internal usage only\n\tmap: function( elems, callback, arg ) {\n\t\tvar length, value,\n\t\t\ti = 0,\n\t\t\tret = [];\n\n\t\t// Go through the array, translating each of the items to their new values\n\t\tif ( isArrayLike( elems ) ) {\n\t\t\tlength = elems.length;\n\t\t\tfor ( ; i < length; i++ ) {\n\t\t\t\tvalue = callback( elems[ i ], i, arg );\n\n\t\t\t\tif ( value != null ) {\n\t\t\t\t\tret.push( value );\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Go through every key on the object,\n\t\t} else {\n\t\t\tfor ( i in elems ) {\n\t\t\t\tvalue = callback( elems[ i ], i, arg );\n\n\t\t\t\tif ( value != null ) {\n\t\t\t\t\tret.push( value );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Flatten any nested arrays\n\t\treturn concat.apply( [], ret );\n\t},\n\n\t// A global GUID counter for objects\n\tguid: 1,\n\n\t// jQuery.support is not used in Core but other projects attach their\n\t// properties to it so it needs to exist.\n\tsupport: support\n} );\n\nif ( typeof Symbol === \"function\" ) {\n\tjQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];\n}\n\n// Populate the class2type map\njQuery.each( \"Boolean Number String Function Array Date RegExp Object Error Symbol\".split( \" \" ),\nfunction( i, name ) {\n\tclass2type[ \"[object \" + name + \"]\" ] = name.toLowerCase();\n} );\n\nfunction isArrayLike( obj ) {\n\n\t// Support: real iOS 8.2 only (not reproducible in simulator)\n\t// `in` check used to prevent JIT error (gh-2145)\n\t// hasOwn isn't used here due to false negatives\n\t// regarding Nodelist length in IE\n\tvar length = !!obj && \"length\" in obj && obj.length,\n\t\ttype = toType( obj );\n\n\tif ( isFunction( obj ) || isWindow( obj ) ) {\n\t\treturn false;\n\t}\n\n\treturn type === \"array\" || length === 0 ||\n\t\ttypeof length === \"number\" && length > 0 && ( length - 1 ) in obj;\n}\nvar Sizzle =\n/*!\n * Sizzle CSS Selector Engine v2.3.4\n * https://sizzlejs.com/\n *\n * Copyright JS Foundation and other contributors\n * Released under the MIT license\n * https://js.foundation/\n *\n * Date: 2019-04-08\n */\n(function( window ) {\n\nvar i,\n\tsupport,\n\tExpr,\n\tgetText,\n\tisXML,\n\ttokenize,\n\tcompile,\n\tselect,\n\toutermostContext,\n\tsortInput,\n\thasDuplicate,\n\n\t// Local document vars\n\tsetDocument,\n\tdocument,\n\tdocElem,\n\tdocumentIsHTML,\n\trbuggyQSA,\n\trbuggyMatches,\n\tmatches,\n\tcontains,\n\n\t// Instance-specific data\n\texpando = \"sizzle\" + 1 * new Date(),\n\tpreferredDoc = window.document,\n\tdirruns = 0,\n\tdone = 0,\n\tclassCache = createCache(),\n\ttokenCache = createCache(),\n\tcompilerCache = createCache(),\n\tnonnativeSelectorCache = createCache(),\n\tsortOrder = function( a, b ) {\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t}\n\t\treturn 0;\n\t},\n\n\t// Instance methods\n\thasOwn = ({}).hasOwnProperty,\n\tarr = [],\n\tpop = arr.pop,\n\tpush_native = arr.push,\n\tpush = arr.push,\n\tslice = arr.slice,\n\t// Use a stripped-down indexOf as it's faster than native\n\t// https://jsperf.com/thor-indexof-vs-for/5\n\tindexOf = function( list, elem ) {\n\t\tvar i = 0,\n\t\t\tlen = list.length;\n\t\tfor ( ; i < len; i++ ) {\n\t\t\tif ( list[i] === elem ) {\n\t\t\t\treturn i;\n\t\t\t}\n\t\t}\n\t\treturn -1;\n\t},\n\n\tbooleans = \"checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped\",\n\n\t// Regular expressions\n\n\t// http://www.w3.org/TR/css3-selectors/#whitespace\n\twhitespace = \"[\\\\x20\\\\t\\\\r\\\\n\\\\f]\",\n\n\t// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier\n\tidentifier = \"(?:\\\\\\\\.|[\\\\w-]|[^\\0-\\\\xa0])+\",\n\n\t// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors\n\tattributes = \"\\\\[\" + whitespace + \"*(\" + identifier + \")(?:\" + whitespace +\n\t\t// Operator (capture 2)\n\t\t\"*([*^$|!~]?=)\" + whitespace +\n\t\t// \"Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]\"\n\t\t\"*(?:'((?:\\\\\\\\.|[^\\\\\\\\'])*)'|\\\"((?:\\\\\\\\.|[^\\\\\\\\\\\"])*)\\\"|(\" + identifier + \"))|)\" + whitespace +\n\t\t\"*\\\\]\",\n\n\tpseudos = \":(\" + identifier + \")(?:\\\\((\" +\n\t\t// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:\n\t\t// 1. quoted (capture 3; capture 4 or capture 5)\n\t\t\"('((?:\\\\\\\\.|[^\\\\\\\\'])*)'|\\\"((?:\\\\\\\\.|[^\\\\\\\\\\\"])*)\\\")|\" +\n\t\t// 2. simple (capture 6)\n\t\t\"((?:\\\\\\\\.|[^\\\\\\\\()[\\\\]]|\" + attributes + \")*)|\" +\n\t\t// 3. anything else (capture 2)\n\t\t\".*\" +\n\t\t\")\\\\)|)\",\n\n\t// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter\n\trwhitespace = new RegExp( whitespace + \"+\", \"g\" ),\n\trtrim = new RegExp( \"^\" + whitespace + \"+|((?:^|[^\\\\\\\\])(?:\\\\\\\\.)*)\" + whitespace + \"+$\", \"g\" ),\n\n\trcomma = new RegExp( \"^\" + whitespace + \"*,\" + whitespace + \"*\" ),\n\trcombinators = new RegExp( \"^\" + whitespace + \"*([>+~]|\" + whitespace + \")\" + whitespace + \"*\" ),\n\trdescend = new RegExp( whitespace + \"|>\" ),\n\n\trpseudo = new RegExp( pseudos ),\n\tridentifier = new RegExp( \"^\" + identifier + \"$\" ),\n\n\tmatchExpr = {\n\t\t\"ID\": new RegExp( \"^#(\" + identifier + \")\" ),\n\t\t\"CLASS\": new RegExp( \"^\\\\.(\" + identifier + \")\" ),\n\t\t\"TAG\": new RegExp( \"^(\" + identifier + \"|[*])\" ),\n\t\t\"ATTR\": new RegExp( \"^\" + attributes ),\n\t\t\"PSEUDO\": new RegExp( \"^\" + pseudos ),\n\t\t\"CHILD\": new RegExp( \"^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\\\(\" + whitespace +\n\t\t\t\"*(even|odd|(([+-]|)(\\\\d*)n|)\" + whitespace + \"*(?:([+-]|)\" + whitespace +\n\t\t\t\"*(\\\\d+)|))\" + whitespace + \"*\\\\)|)\", \"i\" ),\n\t\t\"bool\": new RegExp( \"^(?:\" + booleans + \")$\", \"i\" ),\n\t\t// For use in libraries implementing .is()\n\t\t// We use this for POS matching in `select`\n\t\t\"needsContext\": new RegExp( \"^\" + whitespace + \"*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\\\(\" +\n\t\t\twhitespace + \"*((?:-\\\\d)?\\\\d*)\" + whitespace + \"*\\\\)|)(?=[^-]|$)\", \"i\" )\n\t},\n\n\trhtml = /HTML$/i,\n\trinputs = /^(?:input|select|textarea|button)$/i,\n\trheader = /^h\\d$/i,\n\n\trnative = /^[^{]+\\{\\s*\\[native \\w/,\n\n\t// Easily-parseable/retrievable ID or TAG or CLASS selectors\n\trquickExpr = /^(?:#([\\w-]+)|(\\w+)|\\.([\\w-]+))$/,\n\n\trsibling = /[+~]/,\n\n\t// CSS escapes\n\t// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters\n\trunescape = new RegExp( \"\\\\\\\\([\\\\da-f]{1,6}\" + whitespace + \"?|(\" + whitespace + \")|.)\", \"ig\" ),\n\tfunescape = function( _, escaped, escapedWhitespace ) {\n\t\tvar high = \"0x\" + escaped - 0x10000;\n\t\t// NaN means non-codepoint\n\t\t// Support: Firefox<24\n\t\t// Workaround erroneous numeric interpretation of +\"0x\"\n\t\treturn high !== high || escapedWhitespace ?\n\t\t\tescaped :\n\t\t\thigh < 0 ?\n\t\t\t\t// BMP codepoint\n\t\t\t\tString.fromCharCode( high + 0x10000 ) :\n\t\t\t\t// Supplemental Plane codepoint (surrogate pair)\n\t\t\t\tString.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );\n\t},\n\n\t// CSS string/identifier serialization\n\t// https://drafts.csswg.org/cssom/#common-serializing-idioms\n\trcssescape = /([\\0-\\x1f\\x7f]|^-?\\d)|^-$|[^\\0-\\x1f\\x7f-\\uFFFF\\w-]/g,\n\tfcssescape = function( ch, asCodePoint ) {\n\t\tif ( asCodePoint ) {\n\n\t\t\t// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER\n\t\t\tif ( ch === \"\\0\" ) {\n\t\t\t\treturn \"\\uFFFD\";\n\t\t\t}\n\n\t\t\t// Control characters and (dependent upon position) numbers get escaped as code points\n\t\t\treturn ch.slice( 0, -1 ) + \"\\\\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + \" \";\n\t\t}\n\n\t\t// Other potentially-special ASCII characters get backslash-escaped\n\t\treturn \"\\\\\" + ch;\n\t},\n\n\t// Used for iframes\n\t// See setDocument()\n\t// Removing the function wrapper causes a \"Permission Denied\"\n\t// error in IE\n\tunloadHandler = function() {\n\t\tsetDocument();\n\t},\n\n\tinDisabledFieldset = addCombinator(\n\t\tfunction( elem ) {\n\t\t\treturn elem.disabled === true && elem.nodeName.toLowerCase() === \"fieldset\";\n\t\t},\n\t\t{ dir: \"parentNode\", next: \"legend\" }\n\t);\n\n// Optimize for push.apply( _, NodeList )\ntry {\n\tpush.apply(\n\t\t(arr = slice.call( preferredDoc.childNodes )),\n\t\tpreferredDoc.childNodes\n\t);\n\t// Support: Android<4.0\n\t// Detect silently failing push.apply\n\tarr[ preferredDoc.childNodes.length ].nodeType;\n} catch ( e ) {\n\tpush = { apply: arr.length ?\n\n\t\t// Leverage slice if possible\n\t\tfunction( target, els ) {\n\t\t\tpush_native.apply( target, slice.call(els) );\n\t\t} :\n\n\t\t// Support: IE<9\n\t\t// Otherwise append directly\n\t\tfunction( target, els ) {\n\t\t\tvar j = target.length,\n\t\t\t\ti = 0;\n\t\t\t// Can't trust NodeList.length\n\t\t\twhile ( (target[j++] = els[i++]) ) {}\n\t\t\ttarget.length = j - 1;\n\t\t}\n\t};\n}\n\nfunction Sizzle( selector, context, results, seed ) {\n\tvar m, i, elem, nid, match, groups, newSelector,\n\t\tnewContext = context && context.ownerDocument,\n\n\t\t// nodeType defaults to 9, since context defaults to document\n\t\tnodeType = context ? context.nodeType : 9;\n\n\tresults = results || [];\n\n\t// Return early from calls with invalid selector or context\n\tif ( typeof selector !== \"string\" || !selector ||\n\t\tnodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {\n\n\t\treturn results;\n\t}\n\n\t// Try to shortcut find operations (as opposed to filters) in HTML documents\n\tif ( !seed ) {\n\n\t\tif ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {\n\t\t\tsetDocument( context );\n\t\t}\n\t\tcontext = context || document;\n\n\t\tif ( documentIsHTML ) {\n\n\t\t\t// If the selector is sufficiently simple, try using a \"get*By*\" DOM method\n\t\t\t// (excepting DocumentFragment context, where the methods don't exist)\n\t\t\tif ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {\n\n\t\t\t\t// ID selector\n\t\t\t\tif ( (m = match[1]) ) {\n\n\t\t\t\t\t// Document context\n\t\t\t\t\tif ( nodeType === 9 ) {\n\t\t\t\t\t\tif ( (elem = context.getElementById( m )) ) {\n\n\t\t\t\t\t\t\t// Support: IE, Opera, Webkit\n\t\t\t\t\t\t\t// TODO: identify versions\n\t\t\t\t\t\t\t// getElementById can match elements by name instead of ID\n\t\t\t\t\t\t\tif ( elem.id === m ) {\n\t\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t// Element context\n\t\t\t\t\t} else {\n\n\t\t\t\t\t\t// Support: IE, Opera, Webkit\n\t\t\t\t\t\t// TODO: identify versions\n\t\t\t\t\t\t// getElementById can match elements by name instead of ID\n\t\t\t\t\t\tif ( newContext && (elem = newContext.getElementById( m )) &&\n\t\t\t\t\t\t\tcontains( context, elem ) &&\n\t\t\t\t\t\t\telem.id === m ) {\n\n\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\treturn results;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t// Type selector\n\t\t\t\t} else if ( match[2] ) {\n\t\t\t\t\tpush.apply( results, context.getElementsByTagName( selector ) );\n\t\t\t\t\treturn results;\n\n\t\t\t\t// Class selector\n\t\t\t\t} else if ( (m = match[3]) && support.getElementsByClassName &&\n\t\t\t\t\tcontext.getElementsByClassName ) {\n\n\t\t\t\t\tpush.apply( results, context.getElementsByClassName( m ) );\n\t\t\t\t\treturn results;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Take advantage of querySelectorAll\n\t\t\tif ( support.qsa &&\n\t\t\t\t!nonnativeSelectorCache[ selector + \" \" ] &&\n\t\t\t\t(!rbuggyQSA || !rbuggyQSA.test( selector )) &&\n\n\t\t\t\t// Support: IE 8 only\n\t\t\t\t// Exclude object elements\n\t\t\t\t(nodeType !== 1 || context.nodeName.toLowerCase() !== \"object\") ) {\n\n\t\t\t\tnewSelector = selector;\n\t\t\t\tnewContext = context;\n\n\t\t\t\t// qSA considers elements outside a scoping root when evaluating child or\n\t\t\t\t// descendant combinators, which is not what we want.\n\t\t\t\t// In such cases, we work around the behavior by prefixing every selector in the\n\t\t\t\t// list with an ID selector referencing the scope context.\n\t\t\t\t// Thanks to Andrew Dupont for this technique.\n\t\t\t\tif ( nodeType === 1 && rdescend.test( selector ) ) {\n\n\t\t\t\t\t// Capture the context ID, setting it first if necessary\n\t\t\t\t\tif ( (nid = context.getAttribute( \"id\" )) ) {\n\t\t\t\t\t\tnid = nid.replace( rcssescape, fcssescape );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tcontext.setAttribute( \"id\", (nid = expando) );\n\t\t\t\t\t}\n\n\t\t\t\t\t// Prefix every selector in the list\n\t\t\t\t\tgroups = tokenize( selector );\n\t\t\t\t\ti = groups.length;\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tgroups[i] = \"#\" + nid + \" \" + toSelector( groups[i] );\n\t\t\t\t\t}\n\t\t\t\t\tnewSelector = groups.join( \",\" );\n\n\t\t\t\t\t// Expand context for sibling selectors\n\t\t\t\t\tnewContext = rsibling.test( selector ) && testContext( context.parentNode ) ||\n\t\t\t\t\t\tcontext;\n\t\t\t\t}\n\n\t\t\t\ttry {\n\t\t\t\t\tpush.apply( results,\n\t\t\t\t\t\tnewContext.querySelectorAll( newSelector )\n\t\t\t\t\t);\n\t\t\t\t\treturn results;\n\t\t\t\t} catch ( qsaError ) {\n\t\t\t\t\tnonnativeSelectorCache( selector, true );\n\t\t\t\t} finally {\n\t\t\t\t\tif ( nid === expando ) {\n\t\t\t\t\t\tcontext.removeAttribute( \"id\" );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// All others\n\treturn select( selector.replace( rtrim, \"$1\" ), context, results, seed );\n}\n\n/**\n * Create key-value caches of limited size\n * @returns {function(string, object)} Returns the Object data after storing it on itself with\n *\tproperty name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)\n *\tdeleting the oldest entry\n */\nfunction createCache() {\n\tvar keys = [];\n\n\tfunction cache( key, value ) {\n\t\t// Use (key + \" \") to avoid collision with native prototype properties (see Issue #157)\n\t\tif ( keys.push( key + \" \" ) > Expr.cacheLength ) {\n\t\t\t// Only keep the most recent entries\n\t\t\tdelete cache[ keys.shift() ];\n\t\t}\n\t\treturn (cache[ key + \" \" ] = value);\n\t}\n\treturn cache;\n}\n\n/**\n * Mark a function for special use by Sizzle\n * @param {Function} fn The function to mark\n */\nfunction markFunction( fn ) {\n\tfn[ expando ] = true;\n\treturn fn;\n}\n\n/**\n * Support testing using an element\n * @param {Function} fn Passed the created element and returns a boolean result\n */\nfunction assert( fn ) {\n\tvar el = document.createElement(\"fieldset\");\n\n\ttry {\n\t\treturn !!fn( el );\n\t} catch (e) {\n\t\treturn false;\n\t} finally {\n\t\t// Remove from its parent by default\n\t\tif ( el.parentNode ) {\n\t\t\tel.parentNode.removeChild( el );\n\t\t}\n\t\t// release memory in IE\n\t\tel = null;\n\t}\n}\n\n/**\n * Adds the same handler for all of the specified attrs\n * @param {String} attrs Pipe-separated list of attributes\n * @param {Function} handler The method that will be applied\n */\nfunction addHandle( attrs, handler ) {\n\tvar arr = attrs.split(\"|\"),\n\t\ti = arr.length;\n\n\twhile ( i-- ) {\n\t\tExpr.attrHandle[ arr[i] ] = handler;\n\t}\n}\n\n/**\n * Checks document order of two siblings\n * @param {Element} a\n * @param {Element} b\n * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b\n */\nfunction siblingCheck( a, b ) {\n\tvar cur = b && a,\n\t\tdiff = cur && a.nodeType === 1 && b.nodeType === 1 &&\n\t\t\ta.sourceIndex - b.sourceIndex;\n\n\t// Use IE sourceIndex if available on both nodes\n\tif ( diff ) {\n\t\treturn diff;\n\t}\n\n\t// Check if b follows a\n\tif ( cur ) {\n\t\twhile ( (cur = cur.nextSibling) ) {\n\t\t\tif ( cur === b ) {\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn a ? 1 : -1;\n}\n\n/**\n * Returns a function to use in pseudos for input types\n * @param {String} type\n */\nfunction createInputPseudo( type ) {\n\treturn function( elem ) {\n\t\tvar name = elem.nodeName.toLowerCase();\n\t\treturn name === \"input\" && elem.type === type;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for buttons\n * @param {String} type\n */\nfunction createButtonPseudo( type ) {\n\treturn function( elem ) {\n\t\tvar name = elem.nodeName.toLowerCase();\n\t\treturn (name === \"input\" || name === \"button\") && elem.type === type;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for :enabled/:disabled\n * @param {Boolean} disabled true for :disabled; false for :enabled\n */\nfunction createDisabledPseudo( disabled ) {\n\n\t// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable\n\treturn function( elem ) {\n\n\t\t// Only certain elements can match :enabled or :disabled\n\t\t// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled\n\t\t// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled\n\t\tif ( \"form\" in elem ) {\n\n\t\t\t// Check for inherited disabledness on relevant non-disabled elements:\n\t\t\t// * listed form-associated elements in a disabled fieldset\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#category-listed\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled\n\t\t\t// * option elements in a disabled optgroup\n\t\t\t// https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled\n\t\t\t// All such elements have a \"form\" property.\n\t\t\tif ( elem.parentNode && elem.disabled === false ) {\n\n\t\t\t\t// Option elements defer to a parent optgroup if present\n\t\t\t\tif ( \"label\" in elem ) {\n\t\t\t\t\tif ( \"label\" in elem.parentNode ) {\n\t\t\t\t\t\treturn elem.parentNode.disabled === disabled;\n\t\t\t\t\t} else {\n\t\t\t\t\t\treturn elem.disabled === disabled;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Support: IE 6 - 11\n\t\t\t\t// Use the isDisabled shortcut property to check for disabled fieldset ancestors\n\t\t\t\treturn elem.isDisabled === disabled ||\n\n\t\t\t\t\t// Where there is no isDisabled, check manually\n\t\t\t\t\t/* jshint -W018 */\n\t\t\t\t\telem.isDisabled !== !disabled &&\n\t\t\t\t\t\tinDisabledFieldset( elem ) === disabled;\n\t\t\t}\n\n\t\t\treturn elem.disabled === disabled;\n\n\t\t// Try to winnow out elements that can't be disabled before trusting the disabled property.\n\t\t// Some victims get caught in our net (label, legend, menu, track), but it shouldn't\n\t\t// even exist on them, let alone have a boolean value.\n\t\t} else if ( \"label\" in elem ) {\n\t\t\treturn elem.disabled === disabled;\n\t\t}\n\n\t\t// Remaining elements are neither :enabled nor :disabled\n\t\treturn false;\n\t};\n}\n\n/**\n * Returns a function to use in pseudos for positionals\n * @param {Function} fn\n */\nfunction createPositionalPseudo( fn ) {\n\treturn markFunction(function( argument ) {\n\t\targument = +argument;\n\t\treturn markFunction(function( seed, matches ) {\n\t\t\tvar j,\n\t\t\t\tmatchIndexes = fn( [], seed.length, argument ),\n\t\t\t\ti = matchIndexes.length;\n\n\t\t\t// Match elements found at the specified indexes\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( seed[ (j = matchIndexes[i]) ] ) {\n\t\t\t\t\tseed[j] = !(matches[j] = seed[j]);\n\t\t\t\t}\n\t\t\t}\n\t\t});\n\t});\n}\n\n/**\n * Checks a node for validity as a Sizzle context\n * @param {Element|Object=} context\n * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value\n */\nfunction testContext( context ) {\n\treturn context && typeof context.getElementsByTagName !== \"undefined\" && context;\n}\n\n// Expose support vars for convenience\nsupport = Sizzle.support = {};\n\n/**\n * Detects XML nodes\n * @param {Element|Object} elem An element or a document\n * @returns {Boolean} True iff elem is a non-HTML XML node\n */\nisXML = Sizzle.isXML = function( elem ) {\n\tvar namespace = elem.namespaceURI,\n\t\tdocElem = (elem.ownerDocument || elem).documentElement;\n\n\t// Support: IE <=8\n\t// Assume HTML when documentElement doesn't yet exist, such as inside loading iframes\n\t// https://bugs.jquery.com/ticket/4833\n\treturn !rhtml.test( namespace || docElem && docElem.nodeName || \"HTML\" );\n};\n\n/**\n * Sets document-related variables once based on the current document\n * @param {Element|Object} [doc] An element or document object to use to set the document\n * @returns {Object} Returns the current document\n */\nsetDocument = Sizzle.setDocument = function( node ) {\n\tvar hasCompare, subWindow,\n\t\tdoc = node ? node.ownerDocument || node : preferredDoc;\n\n\t// Return early if doc is invalid or already selected\n\tif ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {\n\t\treturn document;\n\t}\n\n\t// Update global variables\n\tdocument = doc;\n\tdocElem = document.documentElement;\n\tdocumentIsHTML = !isXML( document );\n\n\t// Support: IE 9-11, Edge\n\t// Accessing iframe documents after unload throws \"permission denied\" errors (jQuery #13936)\n\tif ( preferredDoc !== document &&\n\t\t(subWindow = document.defaultView) && subWindow.top !== subWindow ) {\n\n\t\t// Support: IE 11, Edge\n\t\tif ( subWindow.addEventListener ) {\n\t\t\tsubWindow.addEventListener( \"unload\", unloadHandler, false );\n\n\t\t// Support: IE 9 - 10 only\n\t\t} else if ( subWindow.attachEvent ) {\n\t\t\tsubWindow.attachEvent( \"onunload\", unloadHandler );\n\t\t}\n\t}\n\n\t/* Attributes\n\t---------------------------------------------------------------------- */\n\n\t// Support: IE<8\n\t// Verify that getAttribute really returns attributes and not properties\n\t// (excepting IE8 booleans)\n\tsupport.attributes = assert(function( el ) {\n\t\tel.className = \"i\";\n\t\treturn !el.getAttribute(\"className\");\n\t});\n\n\t/* getElement(s)By*\n\t---------------------------------------------------------------------- */\n\n\t// Check if getElementsByTagName(\"*\") returns only elements\n\tsupport.getElementsByTagName = assert(function( el ) {\n\t\tel.appendChild( document.createComment(\"\") );\n\t\treturn !el.getElementsByTagName(\"*\").length;\n\t});\n\n\t// Support: IE<9\n\tsupport.getElementsByClassName = rnative.test( document.getElementsByClassName );\n\n\t// Support: IE<10\n\t// Check if getElementById returns elements by name\n\t// The broken getElementById methods don't pick up programmatically-set names,\n\t// so use a roundabout getElementsByName test\n\tsupport.getById = assert(function( el ) {\n\t\tdocElem.appendChild( el ).id = expando;\n\t\treturn !document.getElementsByName || !document.getElementsByName( expando ).length;\n\t});\n\n\t// ID filter and find\n\tif ( support.getById ) {\n\t\tExpr.filter[\"ID\"] = function( id ) {\n\t\t\tvar attrId = id.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\treturn elem.getAttribute(\"id\") === attrId;\n\t\t\t};\n\t\t};\n\t\tExpr.find[\"ID\"] = function( id, context ) {\n\t\t\tif ( typeof context.getElementById !== \"undefined\" && documentIsHTML ) {\n\t\t\t\tvar elem = context.getElementById( id );\n\t\t\t\treturn elem ? [ elem ] : [];\n\t\t\t}\n\t\t};\n\t} else {\n\t\tExpr.filter[\"ID\"] = function( id ) {\n\t\t\tvar attrId = id.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\tvar node = typeof elem.getAttributeNode !== \"undefined\" &&\n\t\t\t\t\telem.getAttributeNode(\"id\");\n\t\t\t\treturn node && node.value === attrId;\n\t\t\t};\n\t\t};\n\n\t\t// Support: IE 6 - 7 only\n\t\t// getElementById is not reliable as a find shortcut\n\t\tExpr.find[\"ID\"] = function( id, context ) {\n\t\t\tif ( typeof context.getElementById !== \"undefined\" && documentIsHTML ) {\n\t\t\t\tvar node, i, elems,\n\t\t\t\t\telem = context.getElementById( id );\n\n\t\t\t\tif ( elem ) {\n\n\t\t\t\t\t// Verify the id attribute\n\t\t\t\t\tnode = elem.getAttributeNode(\"id\");\n\t\t\t\t\tif ( node && node.value === id ) {\n\t\t\t\t\t\treturn [ elem ];\n\t\t\t\t\t}\n\n\t\t\t\t\t// Fall back on getElementsByName\n\t\t\t\t\telems = context.getElementsByName( id );\n\t\t\t\t\ti = 0;\n\t\t\t\t\twhile ( (elem = elems[i++]) ) {\n\t\t\t\t\t\tnode = elem.getAttributeNode(\"id\");\n\t\t\t\t\t\tif ( node && node.value === id ) {\n\t\t\t\t\t\t\treturn [ elem ];\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn [];\n\t\t\t}\n\t\t};\n\t}\n\n\t// Tag\n\tExpr.find[\"TAG\"] = support.getElementsByTagName ?\n\t\tfunction( tag, context ) {\n\t\t\tif ( typeof context.getElementsByTagName !== \"undefined\" ) {\n\t\t\t\treturn context.getElementsByTagName( tag );\n\n\t\t\t// DocumentFragment nodes don't have gEBTN\n\t\t\t} else if ( support.qsa ) {\n\t\t\t\treturn context.querySelectorAll( tag );\n\t\t\t}\n\t\t} :\n\n\t\tfunction( tag, context ) {\n\t\t\tvar elem,\n\t\t\t\ttmp = [],\n\t\t\t\ti = 0,\n\t\t\t\t// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too\n\t\t\t\tresults = context.getElementsByTagName( tag );\n\n\t\t\t// Filter out possible comments\n\t\t\tif ( tag === \"*\" ) {\n\t\t\t\twhile ( (elem = results[i++]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 ) {\n\t\t\t\t\t\ttmp.push( elem );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn tmp;\n\t\t\t}\n\t\t\treturn results;\n\t\t};\n\n\t// Class\n\tExpr.find[\"CLASS\"] = support.getElementsByClassName && function( className, context ) {\n\t\tif ( typeof context.getElementsByClassName !== \"undefined\" && documentIsHTML ) {\n\t\t\treturn context.getElementsByClassName( className );\n\t\t}\n\t};\n\n\t/* QSA/matchesSelector\n\t---------------------------------------------------------------------- */\n\n\t// QSA and matchesSelector support\n\n\t// matchesSelector(:active) reports false when true (IE9/Opera 11.5)\n\trbuggyMatches = [];\n\n\t// qSa(:focus) reports false when true (Chrome 21)\n\t// We allow this because of a bug in IE8/9 that throws an error\n\t// whenever `document.activeElement` is accessed on an iframe\n\t// So, we allow :focus to pass through QSA all the time to avoid the IE error\n\t// See https://bugs.jquery.com/ticket/13378\n\trbuggyQSA = [];\n\n\tif ( (support.qsa = rnative.test( document.querySelectorAll )) ) {\n\t\t// Build QSA regex\n\t\t// Regex strategy adopted from Diego Perini\n\t\tassert(function( el ) {\n\t\t\t// Select is set to empty string on purpose\n\t\t\t// This is to test IE's treatment of not explicitly\n\t\t\t// setting a boolean content attribute,\n\t\t\t// since its presence should be enough\n\t\t\t// https://bugs.jquery.com/ticket/12359\n\t\t\tdocElem.appendChild( el ).innerHTML = \"<a id='\" + expando + \"'></a>\" +\n\t\t\t\t\"<select id='\" + expando + \"-\\r\\\\' msallowcapture=''>\" +\n\t\t\t\t\"<option selected=''></option></select>\";\n\n\t\t\t// Support: IE8, Opera 11-12.16\n\t\t\t// Nothing should be selected when empty strings follow ^= or $= or *=\n\t\t\t// The test attribute must be unknown in Opera but \"safe\" for WinRT\n\t\t\t// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section\n\t\t\tif ( el.querySelectorAll(\"[msallowcapture^='']\").length ) {\n\t\t\t\trbuggyQSA.push( \"[*^$]=\" + whitespace + \"*(?:''|\\\"\\\")\" );\n\t\t\t}\n\n\t\t\t// Support: IE8\n\t\t\t// Boolean attributes and \"value\" are not treated correctly\n\t\t\tif ( !el.querySelectorAll(\"[selected]\").length ) {\n\t\t\t\trbuggyQSA.push( \"\\\\[\" + whitespace + \"*(?:value|\" + booleans + \")\" );\n\t\t\t}\n\n\t\t\t// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+\n\t\t\tif ( !el.querySelectorAll( \"[id~=\" + expando + \"-]\" ).length ) {\n\t\t\t\trbuggyQSA.push(\"~=\");\n\t\t\t}\n\n\t\t\t// Webkit/Opera - :checked should return selected option elements\n\t\t\t// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked\n\t\t\t// IE8 throws error here and will not see later tests\n\t\t\tif ( !el.querySelectorAll(\":checked\").length ) {\n\t\t\t\trbuggyQSA.push(\":checked\");\n\t\t\t}\n\n\t\t\t// Support: Safari 8+, iOS 8+\n\t\t\t// https://bugs.webkit.org/show_bug.cgi?id=136851\n\t\t\t// In-page `selector#id sibling-combinator selector` fails\n\t\t\tif ( !el.querySelectorAll( \"a#\" + expando + \"+*\" ).length ) {\n\t\t\t\trbuggyQSA.push(\".#.+[+~]\");\n\t\t\t}\n\t\t});\n\n\t\tassert(function( el ) {\n\t\t\tel.innerHTML = \"<a href='' disabled='disabled'></a>\" +\n\t\t\t\t\"<select disabled='disabled'><option/></select>\";\n\n\t\t\t// Support: Windows 8 Native Apps\n\t\t\t// The type and name attributes are restricted during .innerHTML assignment\n\t\t\tvar input = document.createElement(\"input\");\n\t\t\tinput.setAttribute( \"type\", \"hidden\" );\n\t\t\tel.appendChild( input ).setAttribute( \"name\", \"D\" );\n\n\t\t\t// Support: IE8\n\t\t\t// Enforce case-sensitivity of name attribute\n\t\t\tif ( el.querySelectorAll(\"[name=d]\").length ) {\n\t\t\t\trbuggyQSA.push( \"name\" + whitespace + \"*[*^$|!~]?=\" );\n\t\t\t}\n\n\t\t\t// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)\n\t\t\t// IE8 throws error here and will not see later tests\n\t\t\tif ( el.querySelectorAll(\":enabled\").length !== 2 ) {\n\t\t\t\trbuggyQSA.push( \":enabled\", \":disabled\" );\n\t\t\t}\n\n\t\t\t// Support: IE9-11+\n\t\t\t// IE's :disabled selector does not pick up the children of disabled fieldsets\n\t\t\tdocElem.appendChild( el ).disabled = true;\n\t\t\tif ( el.querySelectorAll(\":disabled\").length !== 2 ) {\n\t\t\t\trbuggyQSA.push( \":enabled\", \":disabled\" );\n\t\t\t}\n\n\t\t\t// Opera 10-11 does not throw on post-comma invalid pseudos\n\t\t\tel.querySelectorAll(\"*,:x\");\n\t\t\trbuggyQSA.push(\",.*:\");\n\t\t});\n\t}\n\n\tif ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||\n\t\tdocElem.webkitMatchesSelector ||\n\t\tdocElem.mozMatchesSelector ||\n\t\tdocElem.oMatchesSelector ||\n\t\tdocElem.msMatchesSelector) )) ) {\n\n\t\tassert(function( el ) {\n\t\t\t// Check to see if it's possible to do matchesSelector\n\t\t\t// on a disconnected node (IE 9)\n\t\t\tsupport.disconnectedMatch = matches.call( el, \"*\" );\n\n\t\t\t// This should fail with an exception\n\t\t\t// Gecko does not error, returns false instead\n\t\t\tmatches.call( el, \"[s!='']:x\" );\n\t\t\trbuggyMatches.push( \"!=\", pseudos );\n\t\t});\n\t}\n\n\trbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join(\"|\") );\n\trbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join(\"|\") );\n\n\t/* Contains\n\t---------------------------------------------------------------------- */\n\thasCompare = rnative.test( docElem.compareDocumentPosition );\n\n\t// Element contains another\n\t// Purposefully self-exclusive\n\t// As in, an element does not contain itself\n\tcontains = hasCompare || rnative.test( docElem.contains ) ?\n\t\tfunction( a, b ) {\n\t\t\tvar adown = a.nodeType === 9 ? a.documentElement : a,\n\t\t\t\tbup = b && b.parentNode;\n\t\t\treturn a === bup || !!( bup && bup.nodeType === 1 && (\n\t\t\t\tadown.contains ?\n\t\t\t\t\tadown.contains( bup ) :\n\t\t\t\t\ta.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16\n\t\t\t));\n\t\t} :\n\t\tfunction( a, b ) {\n\t\t\tif ( b ) {\n\t\t\t\twhile ( (b = b.parentNode) ) {\n\t\t\t\t\tif ( b === a ) {\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t};\n\n\t/* Sorting\n\t---------------------------------------------------------------------- */\n\n\t// Document order sorting\n\tsortOrder = hasCompare ?\n\tfunction( a, b ) {\n\n\t\t// Flag for duplicate removal\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t\treturn 0;\n\t\t}\n\n\t\t// Sort on method existence if only one input has compareDocumentPosition\n\t\tvar compare = !a.compareDocumentPosition - !b.compareDocumentPosition;\n\t\tif ( compare ) {\n\t\t\treturn compare;\n\t\t}\n\n\t\t// Calculate position if both inputs belong to the same document\n\t\tcompare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?\n\t\t\ta.compareDocumentPosition( b ) :\n\n\t\t\t// Otherwise we know they are disconnected\n\t\t\t1;\n\n\t\t// Disconnected nodes\n\t\tif ( compare & 1 ||\n\t\t\t(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {\n\n\t\t\t// Choose the first element that is related to our preferred document\n\t\t\tif ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t\tif ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {\n\t\t\t\treturn 1;\n\t\t\t}\n\n\t\t\t// Maintain original order\n\t\t\treturn sortInput ?\n\t\t\t\t( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :\n\t\t\t\t0;\n\t\t}\n\n\t\treturn compare & 4 ? -1 : 1;\n\t} :\n\tfunction( a, b ) {\n\t\t// Exit early if the nodes are identical\n\t\tif ( a === b ) {\n\t\t\thasDuplicate = true;\n\t\t\treturn 0;\n\t\t}\n\n\t\tvar cur,\n\t\t\ti = 0,\n\t\t\taup = a.parentNode,\n\t\t\tbup = b.parentNode,\n\t\t\tap = [ a ],\n\t\t\tbp = [ b ];\n\n\t\t// Parentless nodes are either documents or disconnected\n\t\tif ( !aup || !bup ) {\n\t\t\treturn a === document ? -1 :\n\t\t\t\tb === document ? 1 :\n\t\t\t\taup ? -1 :\n\t\t\t\tbup ? 1 :\n\t\t\t\tsortInput ?\n\t\t\t\t( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :\n\t\t\t\t0;\n\n\t\t// If the nodes are siblings, we can do a quick check\n\t\t} else if ( aup === bup ) {\n\t\t\treturn siblingCheck( a, b );\n\t\t}\n\n\t\t// Otherwise we need full lists of their ancestors for comparison\n\t\tcur = a;\n\t\twhile ( (cur = cur.parentNode) ) {\n\t\t\tap.unshift( cur );\n\t\t}\n\t\tcur = b;\n\t\twhile ( (cur = cur.parentNode) ) {\n\t\t\tbp.unshift( cur );\n\t\t}\n\n\t\t// Walk down the tree looking for a discrepancy\n\t\twhile ( ap[i] === bp[i] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i ?\n\t\t\t// Do a sibling check if the nodes have a common ancestor\n\t\t\tsiblingCheck( ap[i], bp[i] ) :\n\n\t\t\t// Otherwise nodes in our document sort first\n\t\t\tap[i] === preferredDoc ? -1 :\n\t\t\tbp[i] === preferredDoc ? 1 :\n\t\t\t0;\n\t};\n\n\treturn document;\n};\n\nSizzle.matches = function( expr, elements ) {\n\treturn Sizzle( expr, null, null, elements );\n};\n\nSizzle.matchesSelector = function( elem, expr ) {\n\t// Set document vars if needed\n\tif ( ( elem.ownerDocument || elem ) !== document ) {\n\t\tsetDocument( elem );\n\t}\n\n\tif ( support.matchesSelector && documentIsHTML &&\n\t\t!nonnativeSelectorCache[ expr + \" \" ] &&\n\t\t( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&\n\t\t( !rbuggyQSA || !rbuggyQSA.test( expr ) ) ) {\n\n\t\ttry {\n\t\t\tvar ret = matches.call( elem, expr );\n\n\t\t\t// IE 9's matchesSelector returns false on disconnected nodes\n\t\t\tif ( ret || support.disconnectedMatch ||\n\t\t\t\t\t// As well, disconnected nodes are said to be in a document\n\t\t\t\t\t// fragment in IE 9\n\t\t\t\t\telem.document && elem.document.nodeType !== 11 ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\t\t} catch (e) {\n\t\t\tnonnativeSelectorCache( expr, true );\n\t\t}\n\t}\n\n\treturn Sizzle( expr, document, null, [ elem ] ).length > 0;\n};\n\nSizzle.contains = function( context, elem ) {\n\t// Set document vars if needed\n\tif ( ( context.ownerDocument || context ) !== document ) {\n\t\tsetDocument( context );\n\t}\n\treturn contains( context, elem );\n};\n\nSizzle.attr = function( elem, name ) {\n\t// Set document vars if needed\n\tif ( ( elem.ownerDocument || elem ) !== document ) {\n\t\tsetDocument( elem );\n\t}\n\n\tvar fn = Expr.attrHandle[ name.toLowerCase() ],\n\t\t// Don't get fooled by Object.prototype properties (jQuery #13807)\n\t\tval = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?\n\t\t\tfn( elem, name, !documentIsHTML ) :\n\t\t\tundefined;\n\n\treturn val !== undefined ?\n\t\tval :\n\t\tsupport.attributes || !documentIsHTML ?\n\t\t\telem.getAttribute( name ) :\n\t\t\t(val = elem.getAttributeNode(name)) && val.specified ?\n\t\t\t\tval.value :\n\t\t\t\tnull;\n};\n\nSizzle.escape = function( sel ) {\n\treturn (sel + \"\").replace( rcssescape, fcssescape );\n};\n\nSizzle.error = function( msg ) {\n\tthrow new Error( \"Syntax error, unrecognized expression: \" + msg );\n};\n\n/**\n * Document sorting and removing duplicates\n * @param {ArrayLike} results\n */\nSizzle.uniqueSort = function( results ) {\n\tvar elem,\n\t\tduplicates = [],\n\t\tj = 0,\n\t\ti = 0;\n\n\t// Unless we *know* we can detect duplicates, assume their presence\n\thasDuplicate = !support.detectDuplicates;\n\tsortInput = !support.sortStable && results.slice( 0 );\n\tresults.sort( sortOrder );\n\n\tif ( hasDuplicate ) {\n\t\twhile ( (elem = results[i++]) ) {\n\t\t\tif ( elem === results[ i ] ) {\n\t\t\t\tj = duplicates.push( i );\n\t\t\t}\n\t\t}\n\t\twhile ( j-- ) {\n\t\t\tresults.splice( duplicates[ j ], 1 );\n\t\t}\n\t}\n\n\t// Clear input after sorting to release objects\n\t// See https://github.com/jquery/sizzle/pull/225\n\tsortInput = null;\n\n\treturn results;\n};\n\n/**\n * Utility function for retrieving the text value of an array of DOM nodes\n * @param {Array|Element} elem\n */\ngetText = Sizzle.getText = function( elem ) {\n\tvar node,\n\t\tret = \"\",\n\t\ti = 0,\n\t\tnodeType = elem.nodeType;\n\n\tif ( !nodeType ) {\n\t\t// If no nodeType, this is expected to be an array\n\t\twhile ( (node = elem[i++]) ) {\n\t\t\t// Do not traverse comment nodes\n\t\t\tret += getText( node );\n\t\t}\n\t} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {\n\t\t// Use textContent for elements\n\t\t// innerText usage removed for consistency of new lines (jQuery #11153)\n\t\tif ( typeof elem.textContent === \"string\" ) {\n\t\t\treturn elem.textContent;\n\t\t} else {\n\t\t\t// Traverse its children\n\t\t\tfor ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {\n\t\t\t\tret += getText( elem );\n\t\t\t}\n\t\t}\n\t} else if ( nodeType === 3 || nodeType === 4 ) {\n\t\treturn elem.nodeValue;\n\t}\n\t// Do not include comment or processing instruction nodes\n\n\treturn ret;\n};\n\nExpr = Sizzle.selectors = {\n\n\t// Can be adjusted by the user\n\tcacheLength: 50,\n\n\tcreatePseudo: markFunction,\n\n\tmatch: matchExpr,\n\n\tattrHandle: {},\n\n\tfind: {},\n\n\trelative: {\n\t\t\">\": { dir: \"parentNode\", first: true },\n\t\t\" \": { dir: \"parentNode\" },\n\t\t\"+\": { dir: \"previousSibling\", first: true },\n\t\t\"~\": { dir: \"previousSibling\" }\n\t},\n\n\tpreFilter: {\n\t\t\"ATTR\": function( match ) {\n\t\t\tmatch[1] = match[1].replace( runescape, funescape );\n\n\t\t\t// Move the given value to match[3] whether quoted or unquoted\n\t\t\tmatch[3] = ( match[3] || match[4] || match[5] || \"\" ).replace( runescape, funescape );\n\n\t\t\tif ( match[2] === \"~=\" ) {\n\t\t\t\tmatch[3] = \" \" + match[3] + \" \";\n\t\t\t}\n\n\t\t\treturn match.slice( 0, 4 );\n\t\t},\n\n\t\t\"CHILD\": function( match ) {\n\t\t\t/* matches from matchExpr[\"CHILD\"]\n\t\t\t\t1 type (only|nth|...)\n\t\t\t\t2 what (child|of-type)\n\t\t\t\t3 argument (even|odd|\\d*|\\d*n([+-]\\d+)?|...)\n\t\t\t\t4 xn-component of xn+y argument ([+-]?\\d*n|)\n\t\t\t\t5 sign of xn-component\n\t\t\t\t6 x of xn-component\n\t\t\t\t7 sign of y-component\n\t\t\t\t8 y of y-component\n\t\t\t*/\n\t\t\tmatch[1] = match[1].toLowerCase();\n\n\t\t\tif ( match[1].slice( 0, 3 ) === \"nth\" ) {\n\t\t\t\t// nth-* requires argument\n\t\t\t\tif ( !match[3] ) {\n\t\t\t\t\tSizzle.error( match[0] );\n\t\t\t\t}\n\n\t\t\t\t// numeric x and y parameters for Expr.filter.CHILD\n\t\t\t\t// remember that false/true cast respectively to 0/1\n\t\t\t\tmatch[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === \"even\" || match[3] === \"odd\" ) );\n\t\t\t\tmatch[5] = +( ( match[7] + match[8] ) || match[3] === \"odd\" );\n\n\t\t\t// other types prohibit arguments\n\t\t\t} else if ( match[3] ) {\n\t\t\t\tSizzle.error( match[0] );\n\t\t\t}\n\n\t\t\treturn match;\n\t\t},\n\n\t\t\"PSEUDO\": function( match ) {\n\t\t\tvar excess,\n\t\t\t\tunquoted = !match[6] && match[2];\n\n\t\t\tif ( matchExpr[\"CHILD\"].test( match[0] ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\t// Accept quoted arguments as-is\n\t\t\tif ( match[3] ) {\n\t\t\t\tmatch[2] = match[4] || match[5] || \"\";\n\n\t\t\t// Strip excess characters from unquoted arguments\n\t\t\t} else if ( unquoted && rpseudo.test( unquoted ) &&\n\t\t\t\t// Get excess from tokenize (recursively)\n\t\t\t\t(excess = tokenize( unquoted, true )) &&\n\t\t\t\t// advance to the next closing parenthesis\n\t\t\t\t(excess = unquoted.indexOf( \")\", unquoted.length - excess ) - unquoted.length) ) {\n\n\t\t\t\t// excess is a negative index\n\t\t\t\tmatch[0] = match[0].slice( 0, excess );\n\t\t\t\tmatch[2] = unquoted.slice( 0, excess );\n\t\t\t}\n\n\t\t\t// Return only captures needed by the pseudo filter method (type and argument)\n\t\t\treturn match.slice( 0, 3 );\n\t\t}\n\t},\n\n\tfilter: {\n\n\t\t\"TAG\": function( nodeNameSelector ) {\n\t\t\tvar nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();\n\t\t\treturn nodeNameSelector === \"*\" ?\n\t\t\t\tfunction() { return true; } :\n\t\t\t\tfunction( elem ) {\n\t\t\t\t\treturn elem.nodeName && elem.nodeName.toLowerCase() === nodeName;\n\t\t\t\t};\n\t\t},\n\n\t\t\"CLASS\": function( className ) {\n\t\t\tvar pattern = classCache[ className + \" \" ];\n\n\t\t\treturn pattern ||\n\t\t\t\t(pattern = new RegExp( \"(^|\" + whitespace + \")\" + className + \"(\" + whitespace + \"|$)\" )) &&\n\t\t\t\tclassCache( className, function( elem ) {\n\t\t\t\t\treturn pattern.test( typeof elem.className === \"string\" && elem.className || typeof elem.getAttribute !== \"undefined\" && elem.getAttribute(\"class\") || \"\" );\n\t\t\t\t});\n\t\t},\n\n\t\t\"ATTR\": function( name, operator, check ) {\n\t\t\treturn function( elem ) {\n\t\t\t\tvar result = Sizzle.attr( elem, name );\n\n\t\t\t\tif ( result == null ) {\n\t\t\t\t\treturn operator === \"!=\";\n\t\t\t\t}\n\t\t\t\tif ( !operator ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\n\t\t\t\tresult += \"\";\n\n\t\t\t\treturn operator === \"=\" ? result === check :\n\t\t\t\t\toperator === \"!=\" ? result !== check :\n\t\t\t\t\toperator === \"^=\" ? check && result.indexOf( check ) === 0 :\n\t\t\t\t\toperator === \"*=\" ? check && result.indexOf( check ) > -1 :\n\t\t\t\t\toperator === \"$=\" ? check && result.slice( -check.length ) === check :\n\t\t\t\t\toperator === \"~=\" ? ( \" \" + result.replace( rwhitespace, \" \" ) + \" \" ).indexOf( check ) > -1 :\n\t\t\t\t\toperator === \"|=\" ? result === check || result.slice( 0, check.length + 1 ) === check + \"-\" :\n\t\t\t\t\tfalse;\n\t\t\t};\n\t\t},\n\n\t\t\"CHILD\": function( type, what, argument, first, last ) {\n\t\t\tvar simple = type.slice( 0, 3 ) !== \"nth\",\n\t\t\t\tforward = type.slice( -4 ) !== \"last\",\n\t\t\t\tofType = what === \"of-type\";\n\n\t\t\treturn first === 1 && last === 0 ?\n\n\t\t\t\t// Shortcut for :nth-*(n)\n\t\t\t\tfunction( elem ) {\n\t\t\t\t\treturn !!elem.parentNode;\n\t\t\t\t} :\n\n\t\t\t\tfunction( elem, context, xml ) {\n\t\t\t\t\tvar cache, uniqueCache, outerCache, node, nodeIndex, start,\n\t\t\t\t\t\tdir = simple !== forward ? \"nextSibling\" : \"previousSibling\",\n\t\t\t\t\t\tparent = elem.parentNode,\n\t\t\t\t\t\tname = ofType && elem.nodeName.toLowerCase(),\n\t\t\t\t\t\tuseCache = !xml && !ofType,\n\t\t\t\t\t\tdiff = false;\n\n\t\t\t\t\tif ( parent ) {\n\n\t\t\t\t\t\t// :(first|last|only)-(child|of-type)\n\t\t\t\t\t\tif ( simple ) {\n\t\t\t\t\t\t\twhile ( dir ) {\n\t\t\t\t\t\t\t\tnode = elem;\n\t\t\t\t\t\t\t\twhile ( (node = node[ dir ]) ) {\n\t\t\t\t\t\t\t\t\tif ( ofType ?\n\t\t\t\t\t\t\t\t\t\tnode.nodeName.toLowerCase() === name :\n\t\t\t\t\t\t\t\t\t\tnode.nodeType === 1 ) {\n\n\t\t\t\t\t\t\t\t\t\treturn false;\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t// Reverse direction for :only-* (if we haven't yet done so)\n\t\t\t\t\t\t\t\tstart = dir = type === \"only\" && !start && \"nextSibling\";\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tstart = [ forward ? parent.firstChild : parent.lastChild ];\n\n\t\t\t\t\t\t// non-xml :nth-child(...) stores cache data on `parent`\n\t\t\t\t\t\tif ( forward && useCache ) {\n\n\t\t\t\t\t\t\t// Seek `elem` from a previously-cached index\n\n\t\t\t\t\t\t\t// ...in a gzip-friendly way\n\t\t\t\t\t\t\tnode = parent;\n\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\tcache = uniqueCache[ type ] || [];\n\t\t\t\t\t\t\tnodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];\n\t\t\t\t\t\t\tdiff = nodeIndex && cache[ 2 ];\n\t\t\t\t\t\t\tnode = nodeIndex && parent.childNodes[ nodeIndex ];\n\n\t\t\t\t\t\t\twhile ( (node = ++nodeIndex && node && node[ dir ] ||\n\n\t\t\t\t\t\t\t\t// Fallback to seeking `elem` from the start\n\t\t\t\t\t\t\t\t(diff = nodeIndex = 0) || start.pop()) ) {\n\n\t\t\t\t\t\t\t\t// When found, cache indexes on `parent` and break\n\t\t\t\t\t\t\t\tif ( node.nodeType === 1 && ++diff && node === elem ) {\n\t\t\t\t\t\t\t\t\tuniqueCache[ type ] = [ dirruns, nodeIndex, diff ];\n\t\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t// Use previously-cached element index if available\n\t\t\t\t\t\t\tif ( useCache ) {\n\t\t\t\t\t\t\t\t// ...in a gzip-friendly way\n\t\t\t\t\t\t\t\tnode = elem;\n\t\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\t\tcache = uniqueCache[ type ] || [];\n\t\t\t\t\t\t\t\tnodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];\n\t\t\t\t\t\t\t\tdiff = nodeIndex;\n\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t// xml :nth-child(...)\n\t\t\t\t\t\t\t// or :nth-last-child(...) or :nth(-last)?-of-type(...)\n\t\t\t\t\t\t\tif ( diff === false ) {\n\t\t\t\t\t\t\t\t// Use the same loop as above to seek `elem` from the start\n\t\t\t\t\t\t\t\twhile ( (node = ++nodeIndex && node && node[ dir ] ||\n\t\t\t\t\t\t\t\t\t(diff = nodeIndex = 0) || start.pop()) ) {\n\n\t\t\t\t\t\t\t\t\tif ( ( ofType ?\n\t\t\t\t\t\t\t\t\t\tnode.nodeName.toLowerCase() === name :\n\t\t\t\t\t\t\t\t\t\tnode.nodeType === 1 ) &&\n\t\t\t\t\t\t\t\t\t\t++diff ) {\n\n\t\t\t\t\t\t\t\t\t\t// Cache the index of each encountered element\n\t\t\t\t\t\t\t\t\t\tif ( useCache ) {\n\t\t\t\t\t\t\t\t\t\t\touterCache = node[ expando ] || (node[ expando ] = {});\n\n\t\t\t\t\t\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\t\t\t\t\t\tuniqueCache = outerCache[ node.uniqueID ] ||\n\t\t\t\t\t\t\t\t\t\t\t\t(outerCache[ node.uniqueID ] = {});\n\n\t\t\t\t\t\t\t\t\t\t\tuniqueCache[ type ] = [ dirruns, diff ];\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\tif ( node === elem ) {\n\t\t\t\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Incorporate the offset, then check against cycle size\n\t\t\t\t\t\tdiff -= last;\n\t\t\t\t\t\treturn diff === first || ( diff % first === 0 && diff / first >= 0 );\n\t\t\t\t\t}\n\t\t\t\t};\n\t\t},\n\n\t\t\"PSEUDO\": function( pseudo, argument ) {\n\t\t\t// pseudo-class names are case-insensitive\n\t\t\t// http://www.w3.org/TR/selectors/#pseudo-classes\n\t\t\t// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters\n\t\t\t// Remember that setFilters inherits from pseudos\n\t\t\tvar args,\n\t\t\t\tfn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||\n\t\t\t\t\tSizzle.error( \"unsupported pseudo: \" + pseudo );\n\n\t\t\t// The user may use createPseudo to indicate that\n\t\t\t// arguments are needed to create the filter function\n\t\t\t// just as Sizzle does\n\t\t\tif ( fn[ expando ] ) {\n\t\t\t\treturn fn( argument );\n\t\t\t}\n\n\t\t\t// But maintain support for old signatures\n\t\t\tif ( fn.length > 1 ) {\n\t\t\t\targs = [ pseudo, pseudo, \"\", argument ];\n\t\t\t\treturn Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?\n\t\t\t\t\tmarkFunction(function( seed, matches ) {\n\t\t\t\t\t\tvar idx,\n\t\t\t\t\t\t\tmatched = fn( seed, argument ),\n\t\t\t\t\t\t\ti = matched.length;\n\t\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\t\tidx = indexOf( seed, matched[i] );\n\t\t\t\t\t\t\tseed[ idx ] = !( matches[ idx ] = matched[i] );\n\t\t\t\t\t\t}\n\t\t\t\t\t}) :\n\t\t\t\t\tfunction( elem ) {\n\t\t\t\t\t\treturn fn( elem, 0, args );\n\t\t\t\t\t};\n\t\t\t}\n\n\t\t\treturn fn;\n\t\t}\n\t},\n\n\tpseudos: {\n\t\t// Potentially complex pseudos\n\t\t\"not\": markFunction(function( selector ) {\n\t\t\t// Trim the selector passed to compile\n\t\t\t// to avoid treating leading and trailing\n\t\t\t// spaces as combinators\n\t\t\tvar input = [],\n\t\t\t\tresults = [],\n\t\t\t\tmatcher = compile( selector.replace( rtrim, \"$1\" ) );\n\n\t\t\treturn matcher[ expando ] ?\n\t\t\t\tmarkFunction(function( seed, matches, context, xml ) {\n\t\t\t\t\tvar elem,\n\t\t\t\t\t\tunmatched = matcher( seed, null, xml, [] ),\n\t\t\t\t\t\ti = seed.length;\n\n\t\t\t\t\t// Match elements unmatched by `matcher`\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tif ( (elem = unmatched[i]) ) {\n\t\t\t\t\t\t\tseed[i] = !(matches[i] = elem);\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}) :\n\t\t\t\tfunction( elem, context, xml ) {\n\t\t\t\t\tinput[0] = elem;\n\t\t\t\t\tmatcher( input, null, xml, results );\n\t\t\t\t\t// Don't keep the element (issue #299)\n\t\t\t\t\tinput[0] = null;\n\t\t\t\t\treturn !results.pop();\n\t\t\t\t};\n\t\t}),\n\n\t\t\"has\": markFunction(function( selector ) {\n\t\t\treturn function( elem ) {\n\t\t\t\treturn Sizzle( selector, elem ).length > 0;\n\t\t\t};\n\t\t}),\n\n\t\t\"contains\": markFunction(function( text ) {\n\t\t\ttext = text.replace( runescape, funescape );\n\t\t\treturn function( elem ) {\n\t\t\t\treturn ( elem.textContent || getText( elem ) ).indexOf( text ) > -1;\n\t\t\t};\n\t\t}),\n\n\t\t// \"Whether an element is represented by a :lang() selector\n\t\t// is based solely on the element's language value\n\t\t// being equal to the identifier C,\n\t\t// or beginning with the identifier C immediately followed by \"-\".\n\t\t// The matching of C against the element's language value is performed case-insensitively.\n\t\t// The identifier C does not have to be a valid language name.\"\n\t\t// http://www.w3.org/TR/selectors/#lang-pseudo\n\t\t\"lang\": markFunction( function( lang ) {\n\t\t\t// lang value must be a valid identifier\n\t\t\tif ( !ridentifier.test(lang || \"\") ) {\n\t\t\t\tSizzle.error( \"unsupported lang: \" + lang );\n\t\t\t}\n\t\t\tlang = lang.replace( runescape, funescape ).toLowerCase();\n\t\t\treturn function( elem ) {\n\t\t\t\tvar elemLang;\n\t\t\t\tdo {\n\t\t\t\t\tif ( (elemLang = documentIsHTML ?\n\t\t\t\t\t\telem.lang :\n\t\t\t\t\t\telem.getAttribute(\"xml:lang\") || elem.getAttribute(\"lang\")) ) {\n\n\t\t\t\t\t\telemLang = elemLang.toLowerCase();\n\t\t\t\t\t\treturn elemLang === lang || elemLang.indexOf( lang + \"-\" ) === 0;\n\t\t\t\t\t}\n\t\t\t\t} while ( (elem = elem.parentNode) && elem.nodeType === 1 );\n\t\t\t\treturn false;\n\t\t\t};\n\t\t}),\n\n\t\t// Miscellaneous\n\t\t\"target\": function( elem ) {\n\t\t\tvar hash = window.location && window.location.hash;\n\t\t\treturn hash && hash.slice( 1 ) === elem.id;\n\t\t},\n\n\t\t\"root\": function( elem ) {\n\t\t\treturn elem === docElem;\n\t\t},\n\n\t\t\"focus\": function( elem ) {\n\t\t\treturn elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);\n\t\t},\n\n\t\t// Boolean properties\n\t\t\"enabled\": createDisabledPseudo( false ),\n\t\t\"disabled\": createDisabledPseudo( true ),\n\n\t\t\"checked\": function( elem ) {\n\t\t\t// In CSS3, :checked should return both checked and selected elements\n\t\t\t// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked\n\t\t\tvar nodeName = elem.nodeName.toLowerCase();\n\t\t\treturn (nodeName === \"input\" && !!elem.checked) || (nodeName === \"option\" && !!elem.selected);\n\t\t},\n\n\t\t\"selected\": function( elem ) {\n\t\t\t// Accessing this property makes selected-by-default\n\t\t\t// options in Safari work properly\n\t\t\tif ( elem.parentNode ) {\n\t\t\t\telem.parentNode.selectedIndex;\n\t\t\t}\n\n\t\t\treturn elem.selected === true;\n\t\t},\n\n\t\t// Contents\n\t\t\"empty\": function( elem ) {\n\t\t\t// http://www.w3.org/TR/selectors/#empty-pseudo\n\t\t\t// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),\n\t\t\t// but not by others (comment: 8; processing instruction: 7; etc.)\n\t\t\t// nodeType < 6 works because attributes (2) do not appear as children\n\t\t\tfor ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {\n\t\t\t\tif ( elem.nodeType < 6 ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn true;\n\t\t},\n\n\t\t\"parent\": function( elem ) {\n\t\t\treturn !Expr.pseudos[\"empty\"]( elem );\n\t\t},\n\n\t\t// Element/input types\n\t\t\"header\": function( elem ) {\n\t\t\treturn rheader.test( elem.nodeName );\n\t\t},\n\n\t\t\"input\": function( elem ) {\n\t\t\treturn rinputs.test( elem.nodeName );\n\t\t},\n\n\t\t\"button\": function( elem ) {\n\t\t\tvar name = elem.nodeName.toLowerCase();\n\t\t\treturn name === \"input\" && elem.type === \"button\" || name === \"button\";\n\t\t},\n\n\t\t\"text\": function( elem ) {\n\t\t\tvar attr;\n\t\t\treturn elem.nodeName.toLowerCase() === \"input\" &&\n\t\t\t\telem.type === \"text\" &&\n\n\t\t\t\t// Support: IE<8\n\t\t\t\t// New HTML5 attribute values (e.g., \"search\") appear with elem.type === \"text\"\n\t\t\t\t( (attr = elem.getAttribute(\"type\")) == null || attr.toLowerCase() === \"text\" );\n\t\t},\n\n\t\t// Position-in-collection\n\t\t\"first\": createPositionalPseudo(function() {\n\t\t\treturn [ 0 ];\n\t\t}),\n\n\t\t\"last\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\treturn [ length - 1 ];\n\t\t}),\n\n\t\t\"eq\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\treturn [ argument < 0 ? argument + length : argument ];\n\t\t}),\n\n\t\t\"even\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\tvar i = 0;\n\t\t\tfor ( ; i < length; i += 2 ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"odd\": createPositionalPseudo(function( matchIndexes, length ) {\n\t\t\tvar i = 1;\n\t\t\tfor ( ; i < length; i += 2 ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"lt\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\tvar i = argument < 0 ?\n\t\t\t\targument + length :\n\t\t\t\targument > length ?\n\t\t\t\t\tlength :\n\t\t\t\t\targument;\n\t\t\tfor ( ; --i >= 0; ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t}),\n\n\t\t\"gt\": createPositionalPseudo(function( matchIndexes, length, argument ) {\n\t\t\tvar i = argument < 0 ? argument + length : argument;\n\t\t\tfor ( ; ++i < length; ) {\n\t\t\t\tmatchIndexes.push( i );\n\t\t\t}\n\t\t\treturn matchIndexes;\n\t\t})\n\t}\n};\n\nExpr.pseudos[\"nth\"] = Expr.pseudos[\"eq\"];\n\n// Add button/input type pseudos\nfor ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {\n\tExpr.pseudos[ i ] = createInputPseudo( i );\n}\nfor ( i in { submit: true, reset: true } ) {\n\tExpr.pseudos[ i ] = createButtonPseudo( i );\n}\n\n// Easy API for creating new setFilters\nfunction setFilters() {}\nsetFilters.prototype = Expr.filters = Expr.pseudos;\nExpr.setFilters = new setFilters();\n\ntokenize = Sizzle.tokenize = function( selector, parseOnly ) {\n\tvar matched, match, tokens, type,\n\t\tsoFar, groups, preFilters,\n\t\tcached = tokenCache[ selector + \" \" ];\n\n\tif ( cached ) {\n\t\treturn parseOnly ? 0 : cached.slice( 0 );\n\t}\n\n\tsoFar = selector;\n\tgroups = [];\n\tpreFilters = Expr.preFilter;\n\n\twhile ( soFar ) {\n\n\t\t// Comma and first run\n\t\tif ( !matched || (match = rcomma.exec( soFar )) ) {\n\t\t\tif ( match ) {\n\t\t\t\t// Don't consume trailing commas as valid\n\t\t\t\tsoFar = soFar.slice( match[0].length ) || soFar;\n\t\t\t}\n\t\t\tgroups.push( (tokens = []) );\n\t\t}\n\n\t\tmatched = false;\n\n\t\t// Combinators\n\t\tif ( (match = rcombinators.exec( soFar )) ) {\n\t\t\tmatched = match.shift();\n\t\t\ttokens.push({\n\t\t\t\tvalue: matched,\n\t\t\t\t// Cast descendant combinators to space\n\t\t\t\ttype: match[0].replace( rtrim, \" \" )\n\t\t\t});\n\t\t\tsoFar = soFar.slice( matched.length );\n\t\t}\n\n\t\t// Filters\n\t\tfor ( type in Expr.filter ) {\n\t\t\tif ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||\n\t\t\t\t(match = preFilters[ type ]( match ))) ) {\n\t\t\t\tmatched = match.shift();\n\t\t\t\ttokens.push({\n\t\t\t\t\tvalue: matched,\n\t\t\t\t\ttype: type,\n\t\t\t\t\tmatches: match\n\t\t\t\t});\n\t\t\t\tsoFar = soFar.slice( matched.length );\n\t\t\t}\n\t\t}\n\n\t\tif ( !matched ) {\n\t\t\tbreak;\n\t\t}\n\t}\n\n\t// Return the length of the invalid excess\n\t// if we're just parsing\n\t// Otherwise, throw an error or return tokens\n\treturn parseOnly ?\n\t\tsoFar.length :\n\t\tsoFar ?\n\t\t\tSizzle.error( selector ) :\n\t\t\t// Cache the tokens\n\t\t\ttokenCache( selector, groups ).slice( 0 );\n};\n\nfunction toSelector( tokens ) {\n\tvar i = 0,\n\t\tlen = tokens.length,\n\t\tselector = \"\";\n\tfor ( ; i < len; i++ ) {\n\t\tselector += tokens[i].value;\n\t}\n\treturn selector;\n}\n\nfunction addCombinator( matcher, combinator, base ) {\n\tvar dir = combinator.dir,\n\t\tskip = combinator.next,\n\t\tkey = skip || dir,\n\t\tcheckNonElements = base && key === \"parentNode\",\n\t\tdoneName = done++;\n\n\treturn combinator.first ?\n\t\t// Check against closest ancestor/preceding element\n\t\tfunction( elem, context, xml ) {\n\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\treturn matcher( elem, context, xml );\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t} :\n\n\t\t// Check against all ancestor/preceding elements\n\t\tfunction( elem, context, xml ) {\n\t\t\tvar oldCache, uniqueCache, outerCache,\n\t\t\t\tnewCache = [ dirruns, doneName ];\n\n\t\t\t// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching\n\t\t\tif ( xml ) {\n\t\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\t\tif ( matcher( elem, context, xml ) ) {\n\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\twhile ( (elem = elem[ dir ]) ) {\n\t\t\t\t\tif ( elem.nodeType === 1 || checkNonElements ) {\n\t\t\t\t\t\touterCache = elem[ expando ] || (elem[ expando ] = {});\n\n\t\t\t\t\t\t// Support: IE <9 only\n\t\t\t\t\t\t// Defend against cloned attroperties (jQuery gh-1709)\n\t\t\t\t\t\tuniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});\n\n\t\t\t\t\t\tif ( skip && skip === elem.nodeName.toLowerCase() ) {\n\t\t\t\t\t\t\telem = elem[ dir ] || elem;\n\t\t\t\t\t\t} else if ( (oldCache = uniqueCache[ key ]) &&\n\t\t\t\t\t\t\toldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {\n\n\t\t\t\t\t\t\t// Assign to newCache so results back-propagate to previous elements\n\t\t\t\t\t\t\treturn (newCache[ 2 ] = oldCache[ 2 ]);\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t// Reuse newcache so results back-propagate to previous elements\n\t\t\t\t\t\t\tuniqueCache[ key ] = newCache;\n\n\t\t\t\t\t\t\t// A match means we're done; a fail means we have to keep checking\n\t\t\t\t\t\t\tif ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {\n\t\t\t\t\t\t\t\treturn true;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t};\n}\n\nfunction elementMatcher( matchers ) {\n\treturn matchers.length > 1 ?\n\t\tfunction( elem, context, xml ) {\n\t\t\tvar i = matchers.length;\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( !matchers[i]( elem, context, xml ) ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn true;\n\t\t} :\n\t\tmatchers[0];\n}\n\nfunction multipleContexts( selector, contexts, results ) {\n\tvar i = 0,\n\t\tlen = contexts.length;\n\tfor ( ; i < len; i++ ) {\n\t\tSizzle( selector, contexts[i], results );\n\t}\n\treturn results;\n}\n\nfunction condense( unmatched, map, filter, context, xml ) {\n\tvar elem,\n\t\tnewUnmatched = [],\n\t\ti = 0,\n\t\tlen = unmatched.length,\n\t\tmapped = map != null;\n\n\tfor ( ; i < len; i++ ) {\n\t\tif ( (elem = unmatched[i]) ) {\n\t\t\tif ( !filter || filter( elem, context, xml ) ) {\n\t\t\t\tnewUnmatched.push( elem );\n\t\t\t\tif ( mapped ) {\n\t\t\t\t\tmap.push( i );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn newUnmatched;\n}\n\nfunction setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {\n\tif ( postFilter && !postFilter[ expando ] ) {\n\t\tpostFilter = setMatcher( postFilter );\n\t}\n\tif ( postFinder && !postFinder[ expando ] ) {\n\t\tpostFinder = setMatcher( postFinder, postSelector );\n\t}\n\treturn markFunction(function( seed, results, context, xml ) {\n\t\tvar temp, i, elem,\n\t\t\tpreMap = [],\n\t\t\tpostMap = [],\n\t\t\tpreexisting = results.length,\n\n\t\t\t// Get initial elements from seed or context\n\t\t\telems = seed || multipleContexts( selector || \"*\", context.nodeType ? [ context ] : context, [] ),\n\n\t\t\t// Prefilter to get matcher input, preserving a map for seed-results synchronization\n\t\t\tmatcherIn = preFilter && ( seed || !selector ) ?\n\t\t\t\tcondense( elems, preMap, preFilter, context, xml ) :\n\t\t\t\telems,\n\n\t\t\tmatcherOut = matcher ?\n\t\t\t\t// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,\n\t\t\t\tpostFinder || ( seed ? preFilter : preexisting || postFilter ) ?\n\n\t\t\t\t\t// ...intermediate processing is necessary\n\t\t\t\t\t[] :\n\n\t\t\t\t\t// ...otherwise use results directly\n\t\t\t\t\tresults :\n\t\t\t\tmatcherIn;\n\n\t\t// Find primary matches\n\t\tif ( matcher ) {\n\t\t\tmatcher( matcherIn, matcherOut, context, xml );\n\t\t}\n\n\t\t// Apply postFilter\n\t\tif ( postFilter ) {\n\t\t\ttemp = condense( matcherOut, postMap );\n\t\t\tpostFilter( temp, [], context, xml );\n\n\t\t\t// Un-match failing elements by moving them back to matcherIn\n\t\t\ti = temp.length;\n\t\t\twhile ( i-- ) {\n\t\t\t\tif ( (elem = temp[i]) ) {\n\t\t\t\t\tmatcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif ( seed ) {\n\t\t\tif ( postFinder || preFilter ) {\n\t\t\t\tif ( postFinder ) {\n\t\t\t\t\t// Get the final matcherOut by condensing this intermediate into postFinder contexts\n\t\t\t\t\ttemp = [];\n\t\t\t\t\ti = matcherOut.length;\n\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\tif ( (elem = matcherOut[i]) ) {\n\t\t\t\t\t\t\t// Restore matcherIn since elem is not yet a final match\n\t\t\t\t\t\t\ttemp.push( (matcherIn[i] = elem) );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tpostFinder( null, (matcherOut = []), temp, xml );\n\t\t\t\t}\n\n\t\t\t\t// Move matched elements from seed to results to keep them synchronized\n\t\t\t\ti = matcherOut.length;\n\t\t\t\twhile ( i-- ) {\n\t\t\t\t\tif ( (elem = matcherOut[i]) &&\n\t\t\t\t\t\t(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {\n\n\t\t\t\t\t\tseed[temp] = !(results[temp] = elem);\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Add elements to results, through postFinder if defined\n\t\t} else {\n\t\t\tmatcherOut = condense(\n\t\t\t\tmatcherOut === results ?\n\t\t\t\t\tmatcherOut.splice( preexisting, matcherOut.length ) :\n\t\t\t\t\tmatcherOut\n\t\t\t);\n\t\t\tif ( postFinder ) {\n\t\t\t\tpostFinder( null, results, matcherOut, xml );\n\t\t\t} else {\n\t\t\t\tpush.apply( results, matcherOut );\n\t\t\t}\n\t\t}\n\t});\n}\n\nfunction matcherFromTokens( tokens ) {\n\tvar checkContext, matcher, j,\n\t\tlen = tokens.length,\n\t\tleadingRelative = Expr.relative[ tokens[0].type ],\n\t\timplicitRelative = leadingRelative || Expr.relative[\" \"],\n\t\ti = leadingRelative ? 1 : 0,\n\n\t\t// The foundational matcher ensures that elements are reachable from top-level context(s)\n\t\tmatchContext = addCombinator( function( elem ) {\n\t\t\treturn elem === checkContext;\n\t\t}, implicitRelative, true ),\n\t\tmatchAnyContext = addCombinator( function( elem ) {\n\t\t\treturn indexOf( checkContext, elem ) > -1;\n\t\t}, implicitRelative, true ),\n\t\tmatchers = [ function( elem, context, xml ) {\n\t\t\tvar ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (\n\t\t\t\t(checkContext = context).nodeType ?\n\t\t\t\t\tmatchContext( elem, context, xml ) :\n\t\t\t\t\tmatchAnyContext( elem, context, xml ) );\n\t\t\t// Avoid hanging onto element (issue #299)\n\t\t\tcheckContext = null;\n\t\t\treturn ret;\n\t\t} ];\n\n\tfor ( ; i < len; i++ ) {\n\t\tif ( (matcher = Expr.relative[ tokens[i].type ]) ) {\n\t\t\tmatchers = [ addCombinator(elementMatcher( matchers ), matcher) ];\n\t\t} else {\n\t\t\tmatcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );\n\n\t\t\t// Return special upon seeing a positional matcher\n\t\t\tif ( matcher[ expando ] ) {\n\t\t\t\t// Find the next relative operator (if any) for proper handling\n\t\t\t\tj = ++i;\n\t\t\t\tfor ( ; j < len; j++ ) {\n\t\t\t\t\tif ( Expr.relative[ tokens[j].type ] ) {\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn setMatcher(\n\t\t\t\t\ti > 1 && elementMatcher( matchers ),\n\t\t\t\t\ti > 1 && toSelector(\n\t\t\t\t\t\t// If the preceding token was a descendant combinator, insert an implicit any-element `*`\n\t\t\t\t\t\ttokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === \" \" ? \"*\" : \"\" })\n\t\t\t\t\t).replace( rtrim, \"$1\" ),\n\t\t\t\t\tmatcher,\n\t\t\t\t\ti < j && matcherFromTokens( tokens.slice( i, j ) ),\n\t\t\t\t\tj < len && matcherFromTokens( (tokens = tokens.slice( j )) ),\n\t\t\t\t\tj < len && toSelector( tokens )\n\t\t\t\t);\n\t\t\t}\n\t\t\tmatchers.push( matcher );\n\t\t}\n\t}\n\n\treturn elementMatcher( matchers );\n}\n\nfunction matcherFromGroupMatchers( elementMatchers, setMatchers ) {\n\tvar bySet = setMatchers.length > 0,\n\t\tbyElement = elementMatchers.length > 0,\n\t\tsuperMatcher = function( seed, context, xml, results, outermost ) {\n\t\t\tvar elem, j, matcher,\n\t\t\t\tmatchedCount = 0,\n\t\t\t\ti = \"0\",\n\t\t\t\tunmatched = seed && [],\n\t\t\t\tsetMatched = [],\n\t\t\t\tcontextBackup = outermostContext,\n\t\t\t\t// We must always have either seed elements or outermost context\n\t\t\t\telems = seed || byElement && Expr.find[\"TAG\"]( \"*\", outermost ),\n\t\t\t\t// Use integer dirruns iff this is the outermost matcher\n\t\t\t\tdirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),\n\t\t\t\tlen = elems.length;\n\n\t\t\tif ( outermost ) {\n\t\t\t\toutermostContext = context === document || context || outermost;\n\t\t\t}\n\n\t\t\t// Add elements passing elementMatchers directly to results\n\t\t\t// Support: IE<9, Safari\n\t\t\t// Tolerate NodeList properties (IE: \"length\"; Safari: <number>) matching elements by id\n\t\t\tfor ( ; i !== len && (elem = elems[i]) != null; i++ ) {\n\t\t\t\tif ( byElement && elem ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\tif ( !context && elem.ownerDocument !== document ) {\n\t\t\t\t\t\tsetDocument( elem );\n\t\t\t\t\t\txml = !documentIsHTML;\n\t\t\t\t\t}\n\t\t\t\t\twhile ( (matcher = elementMatchers[j++]) ) {\n\t\t\t\t\t\tif ( matcher( elem, context || document, xml) ) {\n\t\t\t\t\t\t\tresults.push( elem );\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif ( outermost ) {\n\t\t\t\t\t\tdirruns = dirrunsUnique;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Track unmatched elements for set filters\n\t\t\t\tif ( bySet ) {\n\t\t\t\t\t// They will have gone through all possible matchers\n\t\t\t\t\tif ( (elem = !matcher && elem) ) {\n\t\t\t\t\t\tmatchedCount--;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Lengthen the array for every element, matched or not\n\t\t\t\t\tif ( seed ) {\n\t\t\t\t\t\tunmatched.push( elem );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// `i` is now the count of elements visited above, and adding it to `matchedCount`\n\t\t\t// makes the latter nonnegative.\n\t\t\tmatchedCount += i;\n\n\t\t\t// Apply set filters to unmatched elements\n\t\t\t// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`\n\t\t\t// equals `i`), unless we didn't visit _any_ elements in the above loop because we have\n\t\t\t// no element matchers and no seed.\n\t\t\t// Incrementing an initially-string \"0\" `i` allows `i` to remain a string only in that\n\t\t\t// case, which will result in a \"00\" `matchedCount` that differs from `i` but is also\n\t\t\t// numerically zero.\n\t\t\tif ( bySet && i !== matchedCount ) {\n\t\t\t\tj = 0;\n\t\t\t\twhile ( (matcher = setMatchers[j++]) ) {\n\t\t\t\t\tmatcher( unmatched, setMatched, context, xml );\n\t\t\t\t}\n\n\t\t\t\tif ( seed ) {\n\t\t\t\t\t// Reintegrate element matches to eliminate the need for sorting\n\t\t\t\t\tif ( matchedCount > 0 ) {\n\t\t\t\t\t\twhile ( i-- ) {\n\t\t\t\t\t\t\tif ( !(unmatched[i] || setMatched[i]) ) {\n\t\t\t\t\t\t\t\tsetMatched[i] = pop.call( results );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Discard index placeholder values to get only actual matches\n\t\t\t\t\tsetMatched = condense( setMatched );\n\t\t\t\t}\n\n\t\t\t\t// Add matches to results\n\t\t\t\tpush.apply( results, setMatched );\n\n\t\t\t\t// Seedless set matches succeeding multiple successful matchers stipulate sorting\n\t\t\t\tif ( outermost && !seed && setMatched.length > 0 &&\n\t\t\t\t\t( matchedCount + setMatchers.length ) > 1 ) {\n\n\t\t\t\t\tSizzle.uniqueSort( results );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Override manipulation of globals by nested matchers\n\t\t\tif ( outermost ) {\n\t\t\t\tdirruns = dirrunsUnique;\n\t\t\t\toutermostContext = contextBackup;\n\t\t\t}\n\n\t\t\treturn unmatched;\n\t\t};\n\n\treturn bySet ?\n\t\tmarkFunction( superMatcher ) :\n\t\tsuperMatcher;\n}\n\ncompile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {\n\tvar i,\n\t\tsetMatchers = [],\n\t\telementMatchers = [],\n\t\tcached = compilerCache[ selector + \" \" ];\n\n\tif ( !cached ) {\n\t\t// Generate a function of recursive functions that can be used to check each element\n\t\tif ( !match ) {\n\t\t\tmatch = tokenize( selector );\n\t\t}\n\t\ti = match.length;\n\t\twhile ( i-- ) {\n\t\t\tcached = matcherFromTokens( match[i] );\n\t\t\tif ( cached[ expando ] ) {\n\t\t\t\tsetMatchers.push( cached );\n\t\t\t} else {\n\t\t\t\telementMatchers.push( cached );\n\t\t\t}\n\t\t}\n\n\t\t// Cache the compiled function\n\t\tcached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );\n\n\t\t// Save selector and tokenization\n\t\tcached.selector = selector;\n\t}\n\treturn cached;\n};\n\n/**\n * A low-level selection function that works with Sizzle's compiled\n * selector functions\n * @param {String|Function} selector A selector or a pre-compiled\n * selector function built with Sizzle.compile\n * @param {Element} context\n * @param {Array} [results]\n * @param {Array} [seed] A set of elements to match against\n */\nselect = Sizzle.select = function( selector, context, results, seed ) {\n\tvar i, tokens, token, type, find,\n\t\tcompiled = typeof selector === \"function\" && selector,\n\t\tmatch = !seed && tokenize( (selector = compiled.selector || selector) );\n\n\tresults = results || [];\n\n\t// Try to minimize operations if there is only one selector in the list and no seed\n\t// (the latter of which guarantees us context)\n\tif ( match.length === 1 ) {\n\n\t\t// Reduce context if the leading compound selector is an ID\n\t\ttokens = match[0] = match[0].slice( 0 );\n\t\tif ( tokens.length > 2 && (token = tokens[0]).type === \"ID\" &&\n\t\t\t\tcontext.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {\n\n\t\t\tcontext = ( Expr.find[\"ID\"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];\n\t\t\tif ( !context ) {\n\t\t\t\treturn results;\n\n\t\t\t// Precompiled matchers will still verify ancestry, so step up a level\n\t\t\t} else if ( compiled ) {\n\t\t\t\tcontext = context.parentNode;\n\t\t\t}\n\n\t\t\tselector = selector.slice( tokens.shift().value.length );\n\t\t}\n\n\t\t// Fetch a seed set for right-to-left matching\n\t\ti = matchExpr[\"needsContext\"].test( selector ) ? 0 : tokens.length;\n\t\twhile ( i-- ) {\n\t\t\ttoken = tokens[i];\n\n\t\t\t// Abort if we hit a combinator\n\t\t\tif ( Expr.relative[ (type = token.type) ] ) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tif ( (find = Expr.find[ type ]) ) {\n\t\t\t\t// Search, expanding context for leading sibling combinators\n\t\t\t\tif ( (seed = find(\n\t\t\t\t\ttoken.matches[0].replace( runescape, funescape ),\n\t\t\t\t\trsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context\n\t\t\t\t)) ) {\n\n\t\t\t\t\t// If seed is empty or no tokens remain, we can return early\n\t\t\t\t\ttokens.splice( i, 1 );\n\t\t\t\t\tselector = seed.length && toSelector( tokens );\n\t\t\t\t\tif ( !selector ) {\n\t\t\t\t\t\tpush.apply( results, seed );\n\t\t\t\t\t\treturn results;\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Compile and execute a filtering function if one is not provided\n\t// Provide `match` to avoid retokenization if we modified the selector above\n\t( compiled || compile( selector, match ) )(\n\t\tseed,\n\t\tcontext,\n\t\t!documentIsHTML,\n\t\tresults,\n\t\t!context || rsibling.test( selector ) && testContext( context.parentNode ) || context\n\t);\n\treturn results;\n};\n\n// One-time assignments\n\n// Sort stability\nsupport.sortStable = expando.split(\"\").sort( sortOrder ).join(\"\") === expando;\n\n// Support: Chrome 14-35+\n// Always assume duplicates if they aren't passed to the comparison function\nsupport.detectDuplicates = !!hasDuplicate;\n\n// Initialize against the default document\nsetDocument();\n\n// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)\n// Detached nodes confoundingly follow *each other*\nsupport.sortDetached = assert(function( el ) {\n\t// Should return 1, but returns 4 (following)\n\treturn el.compareDocumentPosition( document.createElement(\"fieldset\") ) & 1;\n});\n\n// Support: IE<8\n// Prevent attribute/property \"interpolation\"\n// https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx\nif ( !assert(function( el ) {\n\tel.innerHTML = \"<a href='#'></a>\";\n\treturn el.firstChild.getAttribute(\"href\") === \"#\" ;\n}) ) {\n\taddHandle( \"type|href|height|width\", function( elem, name, isXML ) {\n\t\tif ( !isXML ) {\n\t\t\treturn elem.getAttribute( name, name.toLowerCase() === \"type\" ? 1 : 2 );\n\t\t}\n\t});\n}\n\n// Support: IE<9\n// Use defaultValue in place of getAttribute(\"value\")\nif ( !support.attributes || !assert(function( el ) {\n\tel.innerHTML = \"<input/>\";\n\tel.firstChild.setAttribute( \"value\", \"\" );\n\treturn el.firstChild.getAttribute( \"value\" ) === \"\";\n}) ) {\n\taddHandle( \"value\", function( elem, name, isXML ) {\n\t\tif ( !isXML && elem.nodeName.toLowerCase() === \"input\" ) {\n\t\t\treturn elem.defaultValue;\n\t\t}\n\t});\n}\n\n// Support: IE<9\n// Use getAttributeNode to fetch booleans when getAttribute lies\nif ( !assert(function( el ) {\n\treturn el.getAttribute(\"disabled\") == null;\n}) ) {\n\taddHandle( booleans, function( elem, name, isXML ) {\n\t\tvar val;\n\t\tif ( !isXML ) {\n\t\t\treturn elem[ name ] === true ? name.toLowerCase() :\n\t\t\t\t\t(val = elem.getAttributeNode( name )) && val.specified ?\n\t\t\t\t\tval.value :\n\t\t\t\tnull;\n\t\t}\n\t});\n}\n\nreturn Sizzle;\n\n})( window );\n\n\n\njQuery.find = Sizzle;\njQuery.expr = Sizzle.selectors;\n\n// Deprecated\njQuery.expr[ \":\" ] = jQuery.expr.pseudos;\njQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;\njQuery.text = Sizzle.getText;\njQuery.isXMLDoc = Sizzle.isXML;\njQuery.contains = Sizzle.contains;\njQuery.escapeSelector = Sizzle.escape;\n\n\n\n\nvar dir = function( elem, dir, until ) {\n\tvar matched = [],\n\t\ttruncate = until !== undefined;\n\n\twhile ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {\n\t\tif ( elem.nodeType === 1 ) {\n\t\t\tif ( truncate && jQuery( elem ).is( until ) ) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tmatched.push( elem );\n\t\t}\n\t}\n\treturn matched;\n};\n\n\nvar siblings = function( n, elem ) {\n\tvar matched = [];\n\n\tfor ( ; n; n = n.nextSibling ) {\n\t\tif ( n.nodeType === 1 && n !== elem ) {\n\t\t\tmatched.push( n );\n\t\t}\n\t}\n\n\treturn matched;\n};\n\n\nvar rneedsContext = jQuery.expr.match.needsContext;\n\n\n\nfunction nodeName( elem, name ) {\n\n return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();\n\n};\nvar rsingleTag = ( /^<([a-z][^\\/\\0>:\\x20\\t\\r\\n\\f]*)[\\x20\\t\\r\\n\\f]*\\/?>(?:<\\/\\1>|)$/i );\n\n\n\n// Implement the identical functionality for filter and not\nfunction winnow( elements, qualifier, not ) {\n\tif ( isFunction( qualifier ) ) {\n\t\treturn jQuery.grep( elements, function( elem, i ) {\n\t\t\treturn !!qualifier.call( elem, i, elem ) !== not;\n\t\t} );\n\t}\n\n\t// Single element\n\tif ( qualifier.nodeType ) {\n\t\treturn jQuery.grep( elements, function( elem ) {\n\t\t\treturn ( elem === qualifier ) !== not;\n\t\t} );\n\t}\n\n\t// Arraylike of elements (jQuery, arguments, Array)\n\tif ( typeof qualifier !== \"string\" ) {\n\t\treturn jQuery.grep( elements, function( elem ) {\n\t\t\treturn ( indexOf.call( qualifier, elem ) > -1 ) !== not;\n\t\t} );\n\t}\n\n\t// Filtered directly for both simple and complex selectors\n\treturn jQuery.filter( qualifier, elements, not );\n}\n\njQuery.filter = function( expr, elems, not ) {\n\tvar elem = elems[ 0 ];\n\n\tif ( not ) {\n\t\texpr = \":not(\" + expr + \")\";\n\t}\n\n\tif ( elems.length === 1 && elem.nodeType === 1 ) {\n\t\treturn jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [];\n\t}\n\n\treturn jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {\n\t\treturn elem.nodeType === 1;\n\t} ) );\n};\n\njQuery.fn.extend( {\n\tfind: function( selector ) {\n\t\tvar i, ret,\n\t\t\tlen = this.length,\n\t\t\tself = this;\n\n\t\tif ( typeof selector !== \"string\" ) {\n\t\t\treturn this.pushStack( jQuery( selector ).filter( function() {\n\t\t\t\tfor ( i = 0; i < len; i++ ) {\n\t\t\t\t\tif ( jQuery.contains( self[ i ], this ) ) {\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} ) );\n\t\t}\n\n\t\tret = this.pushStack( [] );\n\n\t\tfor ( i = 0; i < len; i++ ) {\n\t\t\tjQuery.find( selector, self[ i ], ret );\n\t\t}\n\n\t\treturn len > 1 ? jQuery.uniqueSort( ret ) : ret;\n\t},\n\tfilter: function( selector ) {\n\t\treturn this.pushStack( winnow( this, selector || [], false ) );\n\t},\n\tnot: function( selector ) {\n\t\treturn this.pushStack( winnow( this, selector || [], true ) );\n\t},\n\tis: function( selector ) {\n\t\treturn !!winnow(\n\t\t\tthis,\n\n\t\t\t// If this is a positional/relative selector, check membership in the returned set\n\t\t\t// so $(\"p:first\").is(\"p:last\") won't return true for a doc with two \"p\".\n\t\t\ttypeof selector === \"string\" && rneedsContext.test( selector ) ?\n\t\t\t\tjQuery( selector ) :\n\t\t\t\tselector || [],\n\t\t\tfalse\n\t\t).length;\n\t}\n} );\n\n\n// Initialize a jQuery object\n\n\n// A central reference to the root jQuery(document)\nvar rootjQuery,\n\n\t// A simple way to check for HTML strings\n\t// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)\n\t// Strict HTML recognition (#11290: must start with <)\n\t// Shortcut simple #id case for speed\n\trquickExpr = /^(?:\\s*(<[\\w\\W]+>)[^>]*|#([\\w-]+))$/,\n\n\tinit = jQuery.fn.init = function( selector, context, root ) {\n\t\tvar match, elem;\n\n\t\t// HANDLE: $(\"\"), $(null), $(undefined), $(false)\n\t\tif ( !selector ) {\n\t\t\treturn this;\n\t\t}\n\n\t\t// Method init() accepts an alternate rootjQuery\n\t\t// so migrate can support jQuery.sub (gh-2101)\n\t\troot = root || rootjQuery;\n\n\t\t// Handle HTML strings\n\t\tif ( typeof selector === \"string\" ) {\n\t\t\tif ( selector[ 0 ] === \"<\" &&\n\t\t\t\tselector[ selector.length - 1 ] === \">\" &&\n\t\t\t\tselector.length >= 3 ) {\n\n\t\t\t\t// Assume that strings that start and end with <> are HTML and skip the regex check\n\t\t\t\tmatch = [ null, selector, null ];\n\n\t\t\t} else {\n\t\t\t\tmatch = rquickExpr.exec( selector );\n\t\t\t}\n\n\t\t\t// Match html or make sure no context is specified for #id\n\t\t\tif ( match && ( match[ 1 ] || !context ) ) {\n\n\t\t\t\t// HANDLE: $(html) -> $(array)\n\t\t\t\tif ( match[ 1 ] ) {\n\t\t\t\t\tcontext = context instanceof jQuery ? context[ 0 ] : context;\n\n\t\t\t\t\t// Option to run scripts is true for back-compat\n\t\t\t\t\t// Intentionally let the error be thrown if parseHTML is not present\n\t\t\t\t\tjQuery.merge( this, jQuery.parseHTML(\n\t\t\t\t\t\tmatch[ 1 ],\n\t\t\t\t\t\tcontext && context.nodeType ? context.ownerDocument || context : document,\n\t\t\t\t\t\ttrue\n\t\t\t\t\t) );\n\n\t\t\t\t\t// HANDLE: $(html, props)\n\t\t\t\t\tif ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {\n\t\t\t\t\t\tfor ( match in context ) {\n\n\t\t\t\t\t\t\t// Properties of context are called as methods if possible\n\t\t\t\t\t\t\tif ( isFunction( this[ match ] ) ) {\n\t\t\t\t\t\t\t\tthis[ match ]( context[ match ] );\n\n\t\t\t\t\t\t\t// ...and otherwise set as attributes\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tthis.attr( match, context[ match ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\treturn this;\n\n\t\t\t\t// HANDLE: $(#id)\n\t\t\t\t} else {\n\t\t\t\t\telem = document.getElementById( match[ 2 ] );\n\n\t\t\t\t\tif ( elem ) {\n\n\t\t\t\t\t\t// Inject the element directly into the jQuery object\n\t\t\t\t\t\tthis[ 0 ] = elem;\n\t\t\t\t\t\tthis.length = 1;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\n\t\t\t// HANDLE: $(expr, $(...))\n\t\t\t} else if ( !context || context.jquery ) {\n\t\t\t\treturn ( context || root ).find( selector );\n\n\t\t\t// HANDLE: $(expr, context)\n\t\t\t// (which is just equivalent to: $(context).find(expr)\n\t\t\t} else {\n\t\t\t\treturn this.constructor( context ).find( selector );\n\t\t\t}\n\n\t\t// HANDLE: $(DOMElement)\n\t\t} else if ( selector.nodeType ) {\n\t\t\tthis[ 0 ] = selector;\n\t\t\tthis.length = 1;\n\t\t\treturn this;\n\n\t\t// HANDLE: $(function)\n\t\t// Shortcut for document ready\n\t\t} else if ( isFunction( selector ) ) {\n\t\t\treturn root.ready !== undefined ?\n\t\t\t\troot.ready( selector ) :\n\n\t\t\t\t// Execute immediately if ready is not present\n\t\t\t\tselector( jQuery );\n\t\t}\n\n\t\treturn jQuery.makeArray( selector, this );\n\t};\n\n// Give the init function the jQuery prototype for later instantiation\ninit.prototype = jQuery.fn;\n\n// Initialize central reference\nrootjQuery = jQuery( document );\n\n\nvar rparentsprev = /^(?:parents|prev(?:Until|All))/,\n\n\t// Methods guaranteed to produce a unique set when starting from a unique set\n\tguaranteedUnique = {\n\t\tchildren: true,\n\t\tcontents: true,\n\t\tnext: true,\n\t\tprev: true\n\t};\n\njQuery.fn.extend( {\n\thas: function( target ) {\n\t\tvar targets = jQuery( target, this ),\n\t\t\tl = targets.length;\n\n\t\treturn this.filter( function() {\n\t\t\tvar i = 0;\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tif ( jQuery.contains( this, targets[ i ] ) ) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t},\n\n\tclosest: function( selectors, context ) {\n\t\tvar cur,\n\t\t\ti = 0,\n\t\t\tl = this.length,\n\t\t\tmatched = [],\n\t\t\ttargets = typeof selectors !== \"string\" && jQuery( selectors );\n\n\t\t// Positional selectors never match, since there's no _selection_ context\n\t\tif ( !rneedsContext.test( selectors ) ) {\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tfor ( cur = this[ i ]; cur && cur !== context; cur = cur.parentNode ) {\n\n\t\t\t\t\t// Always skip document fragments\n\t\t\t\t\tif ( cur.nodeType < 11 && ( targets ?\n\t\t\t\t\t\ttargets.index( cur ) > -1 :\n\n\t\t\t\t\t\t// Don't pass non-elements to Sizzle\n\t\t\t\t\t\tcur.nodeType === 1 &&\n\t\t\t\t\t\t\tjQuery.find.matchesSelector( cur, selectors ) ) ) {\n\n\t\t\t\t\t\tmatched.push( cur );\n\t\t\t\t\t\tbreak;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );\n\t},\n\n\t// Determine the position of an element within the set\n\tindex: function( elem ) {\n\n\t\t// No argument, return index in parent\n\t\tif ( !elem ) {\n\t\t\treturn ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;\n\t\t}\n\n\t\t// Index in selector\n\t\tif ( typeof elem === \"string\" ) {\n\t\t\treturn indexOf.call( jQuery( elem ), this[ 0 ] );\n\t\t}\n\n\t\t// Locate the position of the desired element\n\t\treturn indexOf.call( this,\n\n\t\t\t// If it receives a jQuery object, the first element is used\n\t\t\telem.jquery ? elem[ 0 ] : elem\n\t\t);\n\t},\n\n\tadd: function( selector, context ) {\n\t\treturn this.pushStack(\n\t\t\tjQuery.uniqueSort(\n\t\t\t\tjQuery.merge( this.get(), jQuery( selector, context ) )\n\t\t\t)\n\t\t);\n\t},\n\n\taddBack: function( selector ) {\n\t\treturn this.add( selector == null ?\n\t\t\tthis.prevObject : this.prevObject.filter( selector )\n\t\t);\n\t}\n} );\n\nfunction sibling( cur, dir ) {\n\twhile ( ( cur = cur[ dir ] ) && cur.nodeType !== 1 ) {}\n\treturn cur;\n}\n\njQuery.each( {\n\tparent: function( elem ) {\n\t\tvar parent = elem.parentNode;\n\t\treturn parent && parent.nodeType !== 11 ? parent : null;\n\t},\n\tparents: function( elem ) {\n\t\treturn dir( elem, \"parentNode\" );\n\t},\n\tparentsUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"parentNode\", until );\n\t},\n\tnext: function( elem ) {\n\t\treturn sibling( elem, \"nextSibling\" );\n\t},\n\tprev: function( elem ) {\n\t\treturn sibling( elem, \"previousSibling\" );\n\t},\n\tnextAll: function( elem ) {\n\t\treturn dir( elem, \"nextSibling\" );\n\t},\n\tprevAll: function( elem ) {\n\t\treturn dir( elem, \"previousSibling\" );\n\t},\n\tnextUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"nextSibling\", until );\n\t},\n\tprevUntil: function( elem, i, until ) {\n\t\treturn dir( elem, \"previousSibling\", until );\n\t},\n\tsiblings: function( elem ) {\n\t\treturn siblings( ( elem.parentNode || {} ).firstChild, elem );\n\t},\n\tchildren: function( elem ) {\n\t\treturn siblings( elem.firstChild );\n\t},\n\tcontents: function( elem ) {\n\t\tif ( typeof elem.contentDocument !== \"undefined\" ) {\n\t\t\treturn elem.contentDocument;\n\t\t}\n\n\t\t// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only\n\t\t// Treat the template element as a regular one in browsers that\n\t\t// don't support it.\n\t\tif ( nodeName( elem, \"template\" ) ) {\n\t\t\telem = elem.content || elem;\n\t\t}\n\n\t\treturn jQuery.merge( [], elem.childNodes );\n\t}\n}, function( name, fn ) {\n\tjQuery.fn[ name ] = function( until, selector ) {\n\t\tvar matched = jQuery.map( this, fn, until );\n\n\t\tif ( name.slice( -5 ) !== \"Until\" ) {\n\t\t\tselector = until;\n\t\t}\n\n\t\tif ( selector && typeof selector === \"string\" ) {\n\t\t\tmatched = jQuery.filter( selector, matched );\n\t\t}\n\n\t\tif ( this.length > 1 ) {\n\n\t\t\t// Remove duplicates\n\t\t\tif ( !guaranteedUnique[ name ] ) {\n\t\t\t\tjQuery.uniqueSort( matched );\n\t\t\t}\n\n\t\t\t// Reverse order for parents* and prev-derivatives\n\t\t\tif ( rparentsprev.test( name ) ) {\n\t\t\t\tmatched.reverse();\n\t\t\t}\n\t\t}\n\n\t\treturn this.pushStack( matched );\n\t};\n} );\nvar rnothtmlwhite = ( /[^\\x20\\t\\r\\n\\f]+/g );\n\n\n\n// Convert String-formatted options into Object-formatted ones\nfunction createOptions( options ) {\n\tvar object = {};\n\tjQuery.each( options.match( rnothtmlwhite ) || [], function( _, flag ) {\n\t\tobject[ flag ] = true;\n\t} );\n\treturn object;\n}\n\n/*\n * Create a callback list using the following parameters:\n *\n *\toptions: an optional list of space-separated options that will change how\n *\t\t\tthe callback list behaves or a more traditional option object\n *\n * By default a callback list will act like an event callback list and can be\n * \"fired\" multiple times.\n *\n * Possible options:\n *\n *\tonce:\t\t\twill ensure the callback list can only be fired once (like a Deferred)\n *\n *\tmemory:\t\t\twill keep track of previous values and will call any callback added\n *\t\t\t\t\tafter the list has been fired right away with the latest \"memorized\"\n *\t\t\t\t\tvalues (like a Deferred)\n *\n *\tunique:\t\t\twill ensure a callback can only be added once (no duplicate in the list)\n *\n *\tstopOnFalse:\tinterrupt callings when a callback returns false\n *\n */\njQuery.Callbacks = function( options ) {\n\n\t// Convert options from String-formatted to Object-formatted if needed\n\t// (we check in cache first)\n\toptions = typeof options === \"string\" ?\n\t\tcreateOptions( options ) :\n\t\tjQuery.extend( {}, options );\n\n\tvar // Flag to know if list is currently firing\n\t\tfiring,\n\n\t\t// Last fire value for non-forgettable lists\n\t\tmemory,\n\n\t\t// Flag to know if list was already fired\n\t\tfired,\n\n\t\t// Flag to prevent firing\n\t\tlocked,\n\n\t\t// Actual callback list\n\t\tlist = [],\n\n\t\t// Queue of execution data for repeatable lists\n\t\tqueue = [],\n\n\t\t// Index of currently firing callback (modified by add/remove as needed)\n\t\tfiringIndex = -1,\n\n\t\t// Fire callbacks\n\t\tfire = function() {\n\n\t\t\t// Enforce single-firing\n\t\t\tlocked = locked || options.once;\n\n\t\t\t// Execute callbacks for all pending executions,\n\t\t\t// respecting firingIndex overrides and runtime changes\n\t\t\tfired = firing = true;\n\t\t\tfor ( ; queue.length; firingIndex = -1 ) {\n\t\t\t\tmemory = queue.shift();\n\t\t\t\twhile ( ++firingIndex < list.length ) {\n\n\t\t\t\t\t// Run callback and check for early termination\n\t\t\t\t\tif ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&\n\t\t\t\t\t\toptions.stopOnFalse ) {\n\n\t\t\t\t\t\t// Jump to end and forget the data so .add doesn't re-fire\n\t\t\t\t\t\tfiringIndex = list.length;\n\t\t\t\t\t\tmemory = false;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Forget the data if we're done with it\n\t\t\tif ( !options.memory ) {\n\t\t\t\tmemory = false;\n\t\t\t}\n\n\t\t\tfiring = false;\n\n\t\t\t// Clean up if we're done firing for good\n\t\t\tif ( locked ) {\n\n\t\t\t\t// Keep an empty list if we have data for future add calls\n\t\t\t\tif ( memory ) {\n\t\t\t\t\tlist = [];\n\n\t\t\t\t// Otherwise, this object is spent\n\t\t\t\t} else {\n\t\t\t\t\tlist = \"\";\n\t\t\t\t}\n\t\t\t}\n\t\t},\n\n\t\t// Actual Callbacks object\n\t\tself = {\n\n\t\t\t// Add a callback or a collection of callbacks to the list\n\t\t\tadd: function() {\n\t\t\t\tif ( list ) {\n\n\t\t\t\t\t// If we have memory from a past run, we should fire after adding\n\t\t\t\t\tif ( memory && !firing ) {\n\t\t\t\t\t\tfiringIndex = list.length - 1;\n\t\t\t\t\t\tqueue.push( memory );\n\t\t\t\t\t}\n\n\t\t\t\t\t( function add( args ) {\n\t\t\t\t\t\tjQuery.each( args, function( _, arg ) {\n\t\t\t\t\t\t\tif ( isFunction( arg ) ) {\n\t\t\t\t\t\t\t\tif ( !options.unique || !self.has( arg ) ) {\n\t\t\t\t\t\t\t\t\tlist.push( arg );\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} else if ( arg && arg.length && toType( arg ) !== \"string\" ) {\n\n\t\t\t\t\t\t\t\t// Inspect recursively\n\t\t\t\t\t\t\t\tadd( arg );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} );\n\t\t\t\t\t} )( arguments );\n\n\t\t\t\t\tif ( memory && !firing ) {\n\t\t\t\t\t\tfire();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Remove a callback from the list\n\t\t\tremove: function() {\n\t\t\t\tjQuery.each( arguments, function( _, arg ) {\n\t\t\t\t\tvar index;\n\t\t\t\t\twhile ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {\n\t\t\t\t\t\tlist.splice( index, 1 );\n\n\t\t\t\t\t\t// Handle firing indexes\n\t\t\t\t\t\tif ( index <= firingIndex ) {\n\t\t\t\t\t\t\tfiringIndex--;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Check if a given callback is in the list.\n\t\t\t// If no argument is given, return whether or not list has callbacks attached.\n\t\t\thas: function( fn ) {\n\t\t\t\treturn fn ?\n\t\t\t\t\tjQuery.inArray( fn, list ) > -1 :\n\t\t\t\t\tlist.length > 0;\n\t\t\t},\n\n\t\t\t// Remove all callbacks from the list\n\t\t\tempty: function() {\n\t\t\t\tif ( list ) {\n\t\t\t\t\tlist = [];\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Disable .fire and .add\n\t\t\t// Abort any current/pending executions\n\t\t\t// Clear all callbacks and values\n\t\t\tdisable: function() {\n\t\t\t\tlocked = queue = [];\n\t\t\t\tlist = memory = \"\";\n\t\t\t\treturn this;\n\t\t\t},\n\t\t\tdisabled: function() {\n\t\t\t\treturn !list;\n\t\t\t},\n\n\t\t\t// Disable .fire\n\t\t\t// Also disable .add unless we have memory (since it would have no effect)\n\t\t\t// Abort any pending executions\n\t\t\tlock: function() {\n\t\t\t\tlocked = queue = [];\n\t\t\t\tif ( !memory && !firing ) {\n\t\t\t\t\tlist = memory = \"\";\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\t\t\tlocked: function() {\n\t\t\t\treturn !!locked;\n\t\t\t},\n\n\t\t\t// Call all callbacks with the given context and arguments\n\t\t\tfireWith: function( context, args ) {\n\t\t\t\tif ( !locked ) {\n\t\t\t\t\targs = args || [];\n\t\t\t\t\targs = [ context, args.slice ? args.slice() : args ];\n\t\t\t\t\tqueue.push( args );\n\t\t\t\t\tif ( !firing ) {\n\t\t\t\t\t\tfire();\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// Call all the callbacks with the given arguments\n\t\t\tfire: function() {\n\t\t\t\tself.fireWith( this, arguments );\n\t\t\t\treturn this;\n\t\t\t},\n\n\t\t\t// To know if the callbacks have already been called at least once\n\t\t\tfired: function() {\n\t\t\t\treturn !!fired;\n\t\t\t}\n\t\t};\n\n\treturn self;\n};\n\n\nfunction Identity( v ) {\n\treturn v;\n}\nfunction Thrower( ex ) {\n\tthrow ex;\n}\n\nfunction adoptValue( value, resolve, reject, noValue ) {\n\tvar method;\n\n\ttry {\n\n\t\t// Check for promise aspect first to privilege synchronous behavior\n\t\tif ( value && isFunction( ( method = value.promise ) ) ) {\n\t\t\tmethod.call( value ).done( resolve ).fail( reject );\n\n\t\t// Other thenables\n\t\t} else if ( value && isFunction( ( method = value.then ) ) ) {\n\t\t\tmethod.call( value, resolve, reject );\n\n\t\t// Other non-thenables\n\t\t} else {\n\n\t\t\t// Control `resolve` arguments by letting Array#slice cast boolean `noValue` to integer:\n\t\t\t// * false: [ value ].slice( 0 ) => resolve( value )\n\t\t\t// * true: [ value ].slice( 1 ) => resolve()\n\t\t\tresolve.apply( undefined, [ value ].slice( noValue ) );\n\t\t}\n\n\t// For Promises/A+, convert exceptions into rejections\n\t// Since jQuery.when doesn't unwrap thenables, we can skip the extra checks appearing in\n\t// Deferred#then to conditionally suppress rejection.\n\t} catch ( value ) {\n\n\t\t// Support: Android 4.0 only\n\t\t// Strict mode functions invoked without .call/.apply get global-object context\n\t\treject.apply( undefined, [ value ] );\n\t}\n}\n\njQuery.extend( {\n\n\tDeferred: function( func ) {\n\t\tvar tuples = [\n\n\t\t\t\t// action, add listener, callbacks,\n\t\t\t\t// ... .then handlers, argument index, [final state]\n\t\t\t\t[ \"notify\", \"progress\", jQuery.Callbacks( \"memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"memory\" ), 2 ],\n\t\t\t\t[ \"resolve\", \"done\", jQuery.Callbacks( \"once memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"once memory\" ), 0, \"resolved\" ],\n\t\t\t\t[ \"reject\", \"fail\", jQuery.Callbacks( \"once memory\" ),\n\t\t\t\t\tjQuery.Callbacks( \"once memory\" ), 1, \"rejected\" ]\n\t\t\t],\n\t\t\tstate = \"pending\",\n\t\t\tpromise = {\n\t\t\t\tstate: function() {\n\t\t\t\t\treturn state;\n\t\t\t\t},\n\t\t\t\talways: function() {\n\t\t\t\t\tdeferred.done( arguments ).fail( arguments );\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\t\t\t\t\"catch\": function( fn ) {\n\t\t\t\t\treturn promise.then( null, fn );\n\t\t\t\t},\n\n\t\t\t\t// Keep pipe for back-compat\n\t\t\t\tpipe: function( /* fnDone, fnFail, fnProgress */ ) {\n\t\t\t\t\tvar fns = arguments;\n\n\t\t\t\t\treturn jQuery.Deferred( function( newDefer ) {\n\t\t\t\t\t\tjQuery.each( tuples, function( i, tuple ) {\n\n\t\t\t\t\t\t\t// Map tuples (progress, done, fail) to arguments (done, fail, progress)\n\t\t\t\t\t\t\tvar fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];\n\n\t\t\t\t\t\t\t// deferred.progress(function() { bind to newDefer or newDefer.notify })\n\t\t\t\t\t\t\t// deferred.done(function() { bind to newDefer or newDefer.resolve })\n\t\t\t\t\t\t\t// deferred.fail(function() { bind to newDefer or newDefer.reject })\n\t\t\t\t\t\t\tdeferred[ tuple[ 1 ] ]( function() {\n\t\t\t\t\t\t\t\tvar returned = fn && fn.apply( this, arguments );\n\t\t\t\t\t\t\t\tif ( returned && isFunction( returned.promise ) ) {\n\t\t\t\t\t\t\t\t\treturned.promise()\n\t\t\t\t\t\t\t\t\t\t.progress( newDefer.notify )\n\t\t\t\t\t\t\t\t\t\t.done( newDefer.resolve )\n\t\t\t\t\t\t\t\t\t\t.fail( newDefer.reject );\n\t\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\t\tnewDefer[ tuple[ 0 ] + \"With\" ](\n\t\t\t\t\t\t\t\t\t\tthis,\n\t\t\t\t\t\t\t\t\t\tfn ? [ returned ] : arguments\n\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t} );\n\t\t\t\t\t\tfns = null;\n\t\t\t\t\t} ).promise();\n\t\t\t\t},\n\t\t\t\tthen: function( onFulfilled, onRejected, onProgress ) {\n\t\t\t\t\tvar maxDepth = 0;\n\t\t\t\t\tfunction resolve( depth, deferred, handler, special ) {\n\t\t\t\t\t\treturn function() {\n\t\t\t\t\t\t\tvar that = this,\n\t\t\t\t\t\t\t\targs = arguments,\n\t\t\t\t\t\t\t\tmightThrow = function() {\n\t\t\t\t\t\t\t\t\tvar returned, then;\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.3\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-59\n\t\t\t\t\t\t\t\t\t// Ignore double-resolution attempts\n\t\t\t\t\t\t\t\t\tif ( depth < maxDepth ) {\n\t\t\t\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\treturned = handler.apply( that, args );\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.1\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-48\n\t\t\t\t\t\t\t\t\tif ( returned === deferred.promise() ) {\n\t\t\t\t\t\t\t\t\t\tthrow new TypeError( \"Thenable self-resolution\" );\n\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t// Support: Promises/A+ sections 2.3.3.1, 3.5\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-54\n\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-75\n\t\t\t\t\t\t\t\t\t// Retrieve `then` only once\n\t\t\t\t\t\t\t\t\tthen = returned &&\n\n\t\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.4\n\t\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-64\n\t\t\t\t\t\t\t\t\t\t// Only check objects and functions for thenability\n\t\t\t\t\t\t\t\t\t\t( typeof returned === \"object\" ||\n\t\t\t\t\t\t\t\t\t\t\ttypeof returned === \"function\" ) &&\n\t\t\t\t\t\t\t\t\t\treturned.then;\n\n\t\t\t\t\t\t\t\t\t// Handle a returned thenable\n\t\t\t\t\t\t\t\t\tif ( isFunction( then ) ) {\n\n\t\t\t\t\t\t\t\t\t\t// Special processors (notify) just wait for resolution\n\t\t\t\t\t\t\t\t\t\tif ( special ) {\n\t\t\t\t\t\t\t\t\t\t\tthen.call(\n\t\t\t\t\t\t\t\t\t\t\t\treturned,\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Thrower, special )\n\t\t\t\t\t\t\t\t\t\t\t);\n\n\t\t\t\t\t\t\t\t\t\t// Normal processors (resolve) also hook into progress\n\t\t\t\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t\t\t\t// ...and disregard older resolution values\n\t\t\t\t\t\t\t\t\t\t\tmaxDepth++;\n\n\t\t\t\t\t\t\t\t\t\t\tthen.call(\n\t\t\t\t\t\t\t\t\t\t\t\treturned,\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Thrower, special ),\n\t\t\t\t\t\t\t\t\t\t\t\tresolve( maxDepth, deferred, Identity,\n\t\t\t\t\t\t\t\t\t\t\t\t\tdeferred.notifyWith )\n\t\t\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t// Handle all other returned values\n\t\t\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t\t\t// Only substitute handlers pass on context\n\t\t\t\t\t\t\t\t\t\t// and multiple values (non-spec behavior)\n\t\t\t\t\t\t\t\t\t\tif ( handler !== Identity ) {\n\t\t\t\t\t\t\t\t\t\t\tthat = undefined;\n\t\t\t\t\t\t\t\t\t\t\targs = [ returned ];\n\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t// Process the value(s)\n\t\t\t\t\t\t\t\t\t\t// Default process is resolve\n\t\t\t\t\t\t\t\t\t\t( special || deferred.resolveWith )( that, args );\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t},\n\n\t\t\t\t\t\t\t\t// Only normal processors (resolve) catch and reject exceptions\n\t\t\t\t\t\t\t\tprocess = special ?\n\t\t\t\t\t\t\t\t\tmightThrow :\n\t\t\t\t\t\t\t\t\tfunction() {\n\t\t\t\t\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\t\t\t\t\tmightThrow();\n\t\t\t\t\t\t\t\t\t\t} catch ( e ) {\n\n\t\t\t\t\t\t\t\t\t\t\tif ( jQuery.Deferred.exceptionHook ) {\n\t\t\t\t\t\t\t\t\t\t\t\tjQuery.Deferred.exceptionHook( e,\n\t\t\t\t\t\t\t\t\t\t\t\t\tprocess.stackTrace );\n\t\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.4.1\n\t\t\t\t\t\t\t\t\t\t\t// https://promisesaplus.com/#point-61\n\t\t\t\t\t\t\t\t\t\t\t// Ignore post-resolution exceptions\n\t\t\t\t\t\t\t\t\t\t\tif ( depth + 1 >= maxDepth ) {\n\n\t\t\t\t\t\t\t\t\t\t\t\t// Only substitute handlers pass on context\n\t\t\t\t\t\t\t\t\t\t\t\t// and multiple values (non-spec behavior)\n\t\t\t\t\t\t\t\t\t\t\t\tif ( handler !== Thrower ) {\n\t\t\t\t\t\t\t\t\t\t\t\t\tthat = undefined;\n\t\t\t\t\t\t\t\t\t\t\t\t\targs = [ e ];\n\t\t\t\t\t\t\t\t\t\t\t\t}\n\n\t\t\t\t\t\t\t\t\t\t\t\tdeferred.rejectWith( that, args );\n\t\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t\t};\n\n\t\t\t\t\t\t\t// Support: Promises/A+ section 2.3.3.3.1\n\t\t\t\t\t\t\t// https://promisesaplus.com/#point-57\n\t\t\t\t\t\t\t// Re-resolve promises immediately to dodge false rejection from\n\t\t\t\t\t\t\t// subsequent errors\n\t\t\t\t\t\t\tif ( depth ) {\n\t\t\t\t\t\t\t\tprocess();\n\t\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t\t// Call an optional hook to record the stack, in case of exception\n\t\t\t\t\t\t\t\t// since it's otherwise lost when execution goes async\n\t\t\t\t\t\t\t\tif ( jQuery.Deferred.getStackHook ) {\n\t\t\t\t\t\t\t\t\tprocess.stackTrace = jQuery.Deferred.getStackHook();\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\twindow.setTimeout( process );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t};\n\t\t\t\t\t}\n\n\t\t\t\t\treturn jQuery.Deferred( function( newDefer ) {\n\n\t\t\t\t\t\t// progress_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 0 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onProgress ) ?\n\t\t\t\t\t\t\t\t\tonProgress :\n\t\t\t\t\t\t\t\t\tIdentity,\n\t\t\t\t\t\t\t\tnewDefer.notifyWith\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\t// fulfilled_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 1 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onFulfilled ) ?\n\t\t\t\t\t\t\t\t\tonFulfilled :\n\t\t\t\t\t\t\t\t\tIdentity\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\n\t\t\t\t\t\t// rejected_handlers.add( ... )\n\t\t\t\t\t\ttuples[ 2 ][ 3 ].add(\n\t\t\t\t\t\t\tresolve(\n\t\t\t\t\t\t\t\t0,\n\t\t\t\t\t\t\t\tnewDefer,\n\t\t\t\t\t\t\t\tisFunction( onRejected ) ?\n\t\t\t\t\t\t\t\t\tonRejected :\n\t\t\t\t\t\t\t\t\tThrower\n\t\t\t\t\t\t\t)\n\t\t\t\t\t\t);\n\t\t\t\t\t} ).promise();\n\t\t\t\t},\n\n\t\t\t\t// Get a promise for this deferred\n\t\t\t\t// If obj is provided, the promise aspect is added to the object\n\t\t\t\tpromise: function( obj ) {\n\t\t\t\t\treturn obj != null ? jQuery.extend( obj, promise ) : promise;\n\t\t\t\t}\n\t\t\t},\n\t\t\tdeferred = {};\n\n\t\t// Add list-specific methods\n\t\tjQuery.each( tuples, function( i, tuple ) {\n\t\t\tvar list = tuple[ 2 ],\n\t\t\t\tstateString = tuple[ 5 ];\n\n\t\t\t// promise.progress = list.add\n\t\t\t// promise.done = list.add\n\t\t\t// promise.fail = list.add\n\t\t\tpromise[ tuple[ 1 ] ] = list.add;\n\n\t\t\t// Handle state\n\t\t\tif ( stateString ) {\n\t\t\t\tlist.add(\n\t\t\t\t\tfunction() {\n\n\t\t\t\t\t\t// state = \"resolved\" (i.e., fulfilled)\n\t\t\t\t\t\t// state = \"rejected\"\n\t\t\t\t\t\tstate = stateString;\n\t\t\t\t\t},\n\n\t\t\t\t\t// rejected_callbacks.disable\n\t\t\t\t\t// fulfilled_callbacks.disable\n\t\t\t\t\ttuples[ 3 - i ][ 2 ].disable,\n\n\t\t\t\t\t// rejected_handlers.disable\n\t\t\t\t\t// fulfilled_handlers.disable\n\t\t\t\t\ttuples[ 3 - i ][ 3 ].disable,\n\n\t\t\t\t\t// progress_callbacks.lock\n\t\t\t\t\ttuples[ 0 ][ 2 ].lock,\n\n\t\t\t\t\t// progress_handlers.lock\n\t\t\t\t\ttuples[ 0 ][ 3 ].lock\n\t\t\t\t);\n\t\t\t}\n\n\t\t\t// progress_handlers.fire\n\t\t\t// fulfilled_handlers.fire\n\t\t\t// rejected_handlers.fire\n\t\t\tlist.add( tuple[ 3 ].fire );\n\n\t\t\t// deferred.notify = function() { deferred.notifyWith(...) }\n\t\t\t// deferred.resolve = function() { deferred.resolveWith(...) }\n\t\t\t// deferred.reject = function() { deferred.rejectWith(...) }\n\t\t\tdeferred[ tuple[ 0 ] ] = function() {\n\t\t\t\tdeferred[ tuple[ 0 ] + \"With\" ]( this === deferred ? undefined : this, arguments );\n\t\t\t\treturn this;\n\t\t\t};\n\n\t\t\t// deferred.notifyWith = list.fireWith\n\t\t\t// deferred.resolveWith = list.fireWith\n\t\t\t// deferred.rejectWith = list.fireWith\n\t\t\tdeferred[ tuple[ 0 ] + \"With\" ] = list.fireWith;\n\t\t} );\n\n\t\t// Make the deferred a promise\n\t\tpromise.promise( deferred );\n\n\t\t// Call given func if any\n\t\tif ( func ) {\n\t\t\tfunc.call( deferred, deferred );\n\t\t}\n\n\t\t// All done!\n\t\treturn deferred;\n\t},\n\n\t// Deferred helper\n\twhen: function( singleValue ) {\n\t\tvar\n\n\t\t\t// count of uncompleted subordinates\n\t\t\tremaining = arguments.length,\n\n\t\t\t// count of unprocessed arguments\n\t\t\ti = remaining,\n\n\t\t\t// subordinate fulfillment data\n\t\t\tresolveContexts = Array( i ),\n\t\t\tresolveValues = slice.call( arguments ),\n\n\t\t\t// the master Deferred\n\t\t\tmaster = jQuery.Deferred(),\n\n\t\t\t// subordinate callback factory\n\t\t\tupdateFunc = function( i ) {\n\t\t\t\treturn function( value ) {\n\t\t\t\t\tresolveContexts[ i ] = this;\n\t\t\t\t\tresolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;\n\t\t\t\t\tif ( !( --remaining ) ) {\n\t\t\t\t\t\tmaster.resolveWith( resolveContexts, resolveValues );\n\t\t\t\t\t}\n\t\t\t\t};\n\t\t\t};\n\n\t\t// Single- and empty arguments are adopted like Promise.resolve\n\t\tif ( remaining <= 1 ) {\n\t\t\tadoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,\n\t\t\t\t!remaining );\n\n\t\t\t// Use .then() to unwrap secondary thenables (cf. gh-3000)\n\t\t\tif ( master.state() === \"pending\" ||\n\t\t\t\tisFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {\n\n\t\t\t\treturn master.then();\n\t\t\t}\n\t\t}\n\n\t\t// Multiple arguments are aggregated like Promise.all array elements\n\t\twhile ( i-- ) {\n\t\t\tadoptValue( resolveValues[ i ], updateFunc( i ), master.reject );\n\t\t}\n\n\t\treturn master.promise();\n\t}\n} );\n\n\n// These usually indicate a programmer mistake during development,\n// warn about them ASAP rather than swallowing them by default.\nvar rerrorNames = /^(Eval|Internal|Range|Reference|Syntax|Type|URI)Error$/;\n\njQuery.Deferred.exceptionHook = function( error, stack ) {\n\n\t// Support: IE 8 - 9 only\n\t// Console exists when dev tools are open, which can happen at any time\n\tif ( window.console && window.console.warn && error && rerrorNames.test( error.name ) ) {\n\t\twindow.console.warn( \"jQuery.Deferred exception: \" + error.message, error.stack, stack );\n\t}\n};\n\n\n\n\njQuery.readyException = function( error ) {\n\twindow.setTimeout( function() {\n\t\tthrow error;\n\t} );\n};\n\n\n\n\n// The deferred used on DOM ready\nvar readyList = jQuery.Deferred();\n\njQuery.fn.ready = function( fn ) {\n\n\treadyList\n\t\t.then( fn )\n\n\t\t// Wrap jQuery.readyException in a function so that the lookup\n\t\t// happens at the time of error handling instead of callback\n\t\t// registration.\n\t\t.catch( function( error ) {\n\t\t\tjQuery.readyException( error );\n\t\t} );\n\n\treturn this;\n};\n\njQuery.extend( {\n\n\t// Is the DOM ready to be used? Set to true once it occurs.\n\tisReady: false,\n\n\t// A counter to track how many items to wait for before\n\t// the ready event fires. See #6781\n\treadyWait: 1,\n\n\t// Handle when the DOM is ready\n\tready: function( wait ) {\n\n\t\t// Abort if there are pending holds or we're already ready\n\t\tif ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Remember that the DOM is ready\n\t\tjQuery.isReady = true;\n\n\t\t// If a normal DOM Ready event fired, decrement, and wait if need be\n\t\tif ( wait !== true && --jQuery.readyWait > 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If there are functions bound, to execute\n\t\treadyList.resolveWith( document, [ jQuery ] );\n\t}\n} );\n\njQuery.ready.then = readyList.then;\n\n// The ready event handler and self cleanup method\nfunction completed() {\n\tdocument.removeEventListener( \"DOMContentLoaded\", completed );\n\twindow.removeEventListener( \"load\", completed );\n\tjQuery.ready();\n}\n\n// Catch cases where $(document).ready() is called\n// after the browser event has already occurred.\n// Support: IE <=9 - 10 only\n// Older IE sometimes signals \"interactive\" too soon\nif ( document.readyState === \"complete\" ||\n\t( document.readyState !== \"loading\" && !document.documentElement.doScroll ) ) {\n\n\t// Handle it asynchronously to allow scripts the opportunity to delay ready\n\twindow.setTimeout( jQuery.ready );\n\n} else {\n\n\t// Use the handy event callback\n\tdocument.addEventListener( \"DOMContentLoaded\", completed );\n\n\t// A fallback to window.onload, that will always work\n\twindow.addEventListener( \"load\", completed );\n}\n\n\n\n\n// Multifunctional method to get and set values of a collection\n// The value/s can optionally be executed if it's a function\nvar access = function( elems, fn, key, value, chainable, emptyGet, raw ) {\n\tvar i = 0,\n\t\tlen = elems.length,\n\t\tbulk = key == null;\n\n\t// Sets many values\n\tif ( toType( key ) === \"object\" ) {\n\t\tchainable = true;\n\t\tfor ( i in key ) {\n\t\t\taccess( elems, fn, i, key[ i ], true, emptyGet, raw );\n\t\t}\n\n\t// Sets one value\n\t} else if ( value !== undefined ) {\n\t\tchainable = true;\n\n\t\tif ( !isFunction( value ) ) {\n\t\t\traw = true;\n\t\t}\n\n\t\tif ( bulk ) {\n\n\t\t\t// Bulk operations run against the entire set\n\t\t\tif ( raw ) {\n\t\t\t\tfn.call( elems, value );\n\t\t\t\tfn = null;\n\n\t\t\t// ...except when executing function values\n\t\t\t} else {\n\t\t\t\tbulk = fn;\n\t\t\t\tfn = function( elem, key, value ) {\n\t\t\t\t\treturn bulk.call( jQuery( elem ), value );\n\t\t\t\t};\n\t\t\t}\n\t\t}\n\n\t\tif ( fn ) {\n\t\t\tfor ( ; i < len; i++ ) {\n\t\t\t\tfn(\n\t\t\t\t\telems[ i ], key, raw ?\n\t\t\t\t\tvalue :\n\t\t\t\t\tvalue.call( elems[ i ], i, fn( elems[ i ], key ) )\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\t}\n\n\tif ( chainable ) {\n\t\treturn elems;\n\t}\n\n\t// Gets\n\tif ( bulk ) {\n\t\treturn fn.call( elems );\n\t}\n\n\treturn len ? fn( elems[ 0 ], key ) : emptyGet;\n};\n\n\n// Matches dashed string for camelizing\nvar rmsPrefix = /^-ms-/,\n\trdashAlpha = /-([a-z])/g;\n\n// Used by camelCase as callback to replace()\nfunction fcamelCase( all, letter ) {\n\treturn letter.toUpperCase();\n}\n\n// Convert dashed to camelCase; used by the css and data modules\n// Support: IE <=9 - 11, Edge 12 - 15\n// Microsoft forgot to hump their vendor prefix (#9572)\nfunction camelCase( string ) {\n\treturn string.replace( rmsPrefix, \"ms-\" ).replace( rdashAlpha, fcamelCase );\n}\nvar acceptData = function( owner ) {\n\n\t// Accepts only:\n\t// - Node\n\t// - Node.ELEMENT_NODE\n\t// - Node.DOCUMENT_NODE\n\t// - Object\n\t// - Any\n\treturn owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );\n};\n\n\n\n\nfunction Data() {\n\tthis.expando = jQuery.expando + Data.uid++;\n}\n\nData.uid = 1;\n\nData.prototype = {\n\n\tcache: function( owner ) {\n\n\t\t// Check if the owner object already has a cache\n\t\tvar value = owner[ this.expando ];\n\n\t\t// If not, create one\n\t\tif ( !value ) {\n\t\t\tvalue = {};\n\n\t\t\t// We can accept data for non-element nodes in modern browsers,\n\t\t\t// but we should not, see #8335.\n\t\t\t// Always return an empty object.\n\t\t\tif ( acceptData( owner ) ) {\n\n\t\t\t\t// If it is a node unlikely to be stringify-ed or looped over\n\t\t\t\t// use plain assignment\n\t\t\t\tif ( owner.nodeType ) {\n\t\t\t\t\towner[ this.expando ] = value;\n\n\t\t\t\t// Otherwise secure it in a non-enumerable property\n\t\t\t\t// configurable must be true to allow the property to be\n\t\t\t\t// deleted when data is removed\n\t\t\t\t} else {\n\t\t\t\t\tObject.defineProperty( owner, this.expando, {\n\t\t\t\t\t\tvalue: value,\n\t\t\t\t\t\tconfigurable: true\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn value;\n\t},\n\tset: function( owner, data, value ) {\n\t\tvar prop,\n\t\t\tcache = this.cache( owner );\n\n\t\t// Handle: [ owner, key, value ] args\n\t\t// Always use camelCase key (gh-2257)\n\t\tif ( typeof data === \"string\" ) {\n\t\t\tcache[ camelCase( data ) ] = value;\n\n\t\t// Handle: [ owner, { properties } ] args\n\t\t} else {\n\n\t\t\t// Copy the properties one-by-one to the cache object\n\t\t\tfor ( prop in data ) {\n\t\t\t\tcache[ camelCase( prop ) ] = data[ prop ];\n\t\t\t}\n\t\t}\n\t\treturn cache;\n\t},\n\tget: function( owner, key ) {\n\t\treturn key === undefined ?\n\t\t\tthis.cache( owner ) :\n\n\t\t\t// Always use camelCase key (gh-2257)\n\t\t\towner[ this.expando ] && owner[ this.expando ][ camelCase( key ) ];\n\t},\n\taccess: function( owner, key, value ) {\n\n\t\t// In cases where either:\n\t\t//\n\t\t// 1. No key was specified\n\t\t// 2. A string key was specified, but no value provided\n\t\t//\n\t\t// Take the \"read\" path and allow the get method to determine\n\t\t// which value to return, respectively either:\n\t\t//\n\t\t// 1. The entire cache object\n\t\t// 2. The data stored at the key\n\t\t//\n\t\tif ( key === undefined ||\n\t\t\t\t( ( key && typeof key === \"string\" ) && value === undefined ) ) {\n\n\t\t\treturn this.get( owner, key );\n\t\t}\n\n\t\t// When the key is not a string, or both a key and value\n\t\t// are specified, set or extend (existing objects) with either:\n\t\t//\n\t\t// 1. An object of properties\n\t\t// 2. A key and value\n\t\t//\n\t\tthis.set( owner, key, value );\n\n\t\t// Since the \"set\" path can have two possible entry points\n\t\t// return the expected data based on which path was taken[*]\n\t\treturn value !== undefined ? value : key;\n\t},\n\tremove: function( owner, key ) {\n\t\tvar i,\n\t\t\tcache = owner[ this.expando ];\n\n\t\tif ( cache === undefined ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( key !== undefined ) {\n\n\t\t\t// Support array or space separated string of keys\n\t\t\tif ( Array.isArray( key ) ) {\n\n\t\t\t\t// If key is an array of keys...\n\t\t\t\t// We always set camelCase keys, so remove that.\n\t\t\t\tkey = key.map( camelCase );\n\t\t\t} else {\n\t\t\t\tkey = camelCase( key );\n\n\t\t\t\t// If a key with the spaces exists, use it.\n\t\t\t\t// Otherwise, create an array by matching non-whitespace\n\t\t\t\tkey = key in cache ?\n\t\t\t\t\t[ key ] :\n\t\t\t\t\t( key.match( rnothtmlwhite ) || [] );\n\t\t\t}\n\n\t\t\ti = key.length;\n\n\t\t\twhile ( i-- ) {\n\t\t\t\tdelete cache[ key[ i ] ];\n\t\t\t}\n\t\t}\n\n\t\t// Remove the expando if there's no more data\n\t\tif ( key === undefined || jQuery.isEmptyObject( cache ) ) {\n\n\t\t\t// Support: Chrome <=35 - 45\n\t\t\t// Webkit & Blink performance suffers when deleting properties\n\t\t\t// from DOM nodes, so set to undefined instead\n\t\t\t// https://bugs.chromium.org/p/chromium/issues/detail?id=378607 (bug restricted)\n\t\t\tif ( owner.nodeType ) {\n\t\t\t\towner[ this.expando ] = undefined;\n\t\t\t} else {\n\t\t\t\tdelete owner[ this.expando ];\n\t\t\t}\n\t\t}\n\t},\n\thasData: function( owner ) {\n\t\tvar cache = owner[ this.expando ];\n\t\treturn cache !== undefined && !jQuery.isEmptyObject( cache );\n\t}\n};\nvar dataPriv = new Data();\n\nvar dataUser = new Data();\n\n\n\n//\tImplementation Summary\n//\n//\t1. Enforce API surface and semantic compatibility with 1.9.x branch\n//\t2. Improve the module's maintainability by reducing the storage\n//\t\tpaths to a single mechanism.\n//\t3. Use the same single mechanism to support \"private\" and \"user\" data.\n//\t4. _Never_ expose \"private\" data to user code (TODO: Drop _data, _removeData)\n//\t5. Avoid exposing implementation details on user objects (eg. expando properties)\n//\t6. Provide a clear path for implementation upgrade to WeakMap in 2014\n\nvar rbrace = /^(?:\\{[\\w\\W]*\\}|\\[[\\w\\W]*\\])$/,\n\trmultiDash = /[A-Z]/g;\n\nfunction getData( data ) {\n\tif ( data === \"true\" ) {\n\t\treturn true;\n\t}\n\n\tif ( data === \"false\" ) {\n\t\treturn false;\n\t}\n\n\tif ( data === \"null\" ) {\n\t\treturn null;\n\t}\n\n\t// Only convert to a number if it doesn't change the string\n\tif ( data === +data + \"\" ) {\n\t\treturn +data;\n\t}\n\n\tif ( rbrace.test( data ) ) {\n\t\treturn JSON.parse( data );\n\t}\n\n\treturn data;\n}\n\nfunction dataAttr( elem, key, data ) {\n\tvar name;\n\n\t// If nothing was found internally, try to fetch any\n\t// data from the HTML5 data-* attribute\n\tif ( data === undefined && elem.nodeType === 1 ) {\n\t\tname = \"data-\" + key.replace( rmultiDash, \"-$&\" ).toLowerCase();\n\t\tdata = elem.getAttribute( name );\n\n\t\tif ( typeof data === \"string\" ) {\n\t\t\ttry {\n\t\t\t\tdata = getData( data );\n\t\t\t} catch ( e ) {}\n\n\t\t\t// Make sure we set the data so it isn't changed later\n\t\t\tdataUser.set( elem, key, data );\n\t\t} else {\n\t\t\tdata = undefined;\n\t\t}\n\t}\n\treturn data;\n}\n\njQuery.extend( {\n\thasData: function( elem ) {\n\t\treturn dataUser.hasData( elem ) || dataPriv.hasData( elem );\n\t},\n\n\tdata: function( elem, name, data ) {\n\t\treturn dataUser.access( elem, name, data );\n\t},\n\n\tremoveData: function( elem, name ) {\n\t\tdataUser.remove( elem, name );\n\t},\n\n\t// TODO: Now that all calls to _data and _removeData have been replaced\n\t// with direct calls to dataPriv methods, these can be deprecated.\n\t_data: function( elem, name, data ) {\n\t\treturn dataPriv.access( elem, name, data );\n\t},\n\n\t_removeData: function( elem, name ) {\n\t\tdataPriv.remove( elem, name );\n\t}\n} );\n\njQuery.fn.extend( {\n\tdata: function( key, value ) {\n\t\tvar i, name, data,\n\t\t\telem = this[ 0 ],\n\t\t\tattrs = elem && elem.attributes;\n\n\t\t// Gets all values\n\t\tif ( key === undefined ) {\n\t\t\tif ( this.length ) {\n\t\t\t\tdata = dataUser.get( elem );\n\n\t\t\t\tif ( elem.nodeType === 1 && !dataPriv.get( elem, \"hasDataAttrs\" ) ) {\n\t\t\t\t\ti = attrs.length;\n\t\t\t\t\twhile ( i-- ) {\n\n\t\t\t\t\t\t// Support: IE 11 only\n\t\t\t\t\t\t// The attrs elements can be null (#14894)\n\t\t\t\t\t\tif ( attrs[ i ] ) {\n\t\t\t\t\t\t\tname = attrs[ i ].name;\n\t\t\t\t\t\t\tif ( name.indexOf( \"data-\" ) === 0 ) {\n\t\t\t\t\t\t\t\tname = camelCase( name.slice( 5 ) );\n\t\t\t\t\t\t\t\tdataAttr( elem, name, data[ name ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tdataPriv.set( elem, \"hasDataAttrs\", true );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn data;\n\t\t}\n\n\t\t// Sets multiple values\n\t\tif ( typeof key === \"object\" ) {\n\t\t\treturn this.each( function() {\n\t\t\t\tdataUser.set( this, key );\n\t\t\t} );\n\t\t}\n\n\t\treturn access( this, function( value ) {\n\t\t\tvar data;\n\n\t\t\t// The calling jQuery object (element matches) is not empty\n\t\t\t// (and therefore has an element appears at this[ 0 ]) and the\n\t\t\t// `value` parameter was not undefined. An empty jQuery object\n\t\t\t// will result in `undefined` for elem = this[ 0 ] which will\n\t\t\t// throw an exception if an attempt to read a data cache is made.\n\t\t\tif ( elem && value === undefined ) {\n\n\t\t\t\t// Attempt to get data from the cache\n\t\t\t\t// The key will always be camelCased in Data\n\t\t\t\tdata = dataUser.get( elem, key );\n\t\t\t\tif ( data !== undefined ) {\n\t\t\t\t\treturn data;\n\t\t\t\t}\n\n\t\t\t\t// Attempt to \"discover\" the data in\n\t\t\t\t// HTML5 custom data-* attrs\n\t\t\t\tdata = dataAttr( elem, key );\n\t\t\t\tif ( data !== undefined ) {\n\t\t\t\t\treturn data;\n\t\t\t\t}\n\n\t\t\t\t// We tried really hard, but the data doesn't exist.\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Set the data...\n\t\t\tthis.each( function() {\n\n\t\t\t\t// We always store the camelCased key\n\t\t\t\tdataUser.set( this, key, value );\n\t\t\t} );\n\t\t}, null, value, arguments.length > 1, null, true );\n\t},\n\n\tremoveData: function( key ) {\n\t\treturn this.each( function() {\n\t\t\tdataUser.remove( this, key );\n\t\t} );\n\t}\n} );\n\n\njQuery.extend( {\n\tqueue: function( elem, type, data ) {\n\t\tvar queue;\n\n\t\tif ( elem ) {\n\t\t\ttype = ( type || \"fx\" ) + \"queue\";\n\t\t\tqueue = dataPriv.get( elem, type );\n\n\t\t\t// Speed up dequeue by getting out quickly if this is just a lookup\n\t\t\tif ( data ) {\n\t\t\t\tif ( !queue || Array.isArray( data ) ) {\n\t\t\t\t\tqueue = dataPriv.access( elem, type, jQuery.makeArray( data ) );\n\t\t\t\t} else {\n\t\t\t\t\tqueue.push( data );\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn queue || [];\n\t\t}\n\t},\n\n\tdequeue: function( elem, type ) {\n\t\ttype = type || \"fx\";\n\n\t\tvar queue = jQuery.queue( elem, type ),\n\t\t\tstartLength = queue.length,\n\t\t\tfn = queue.shift(),\n\t\t\thooks = jQuery._queueHooks( elem, type ),\n\t\t\tnext = function() {\n\t\t\t\tjQuery.dequeue( elem, type );\n\t\t\t};\n\n\t\t// If the fx queue is dequeued, always remove the progress sentinel\n\t\tif ( fn === \"inprogress\" ) {\n\t\t\tfn = queue.shift();\n\t\t\tstartLength--;\n\t\t}\n\n\t\tif ( fn ) {\n\n\t\t\t// Add a progress sentinel to prevent the fx queue from being\n\t\t\t// automatically dequeued\n\t\t\tif ( type === \"fx\" ) {\n\t\t\t\tqueue.unshift( \"inprogress\" );\n\t\t\t}\n\n\t\t\t// Clear up the last queue stop function\n\t\t\tdelete hooks.stop;\n\t\t\tfn.call( elem, next, hooks );\n\t\t}\n\n\t\tif ( !startLength && hooks ) {\n\t\t\thooks.empty.fire();\n\t\t}\n\t},\n\n\t// Not public - generate a queueHooks object, or return the current one\n\t_queueHooks: function( elem, type ) {\n\t\tvar key = type + \"queueHooks\";\n\t\treturn dataPriv.get( elem, key ) || dataPriv.access( elem, key, {\n\t\t\tempty: jQuery.Callbacks( \"once memory\" ).add( function() {\n\t\t\t\tdataPriv.remove( elem, [ type + \"queue\", key ] );\n\t\t\t} )\n\t\t} );\n\t}\n} );\n\njQuery.fn.extend( {\n\tqueue: function( type, data ) {\n\t\tvar setter = 2;\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tdata = type;\n\t\t\ttype = \"fx\";\n\t\t\tsetter--;\n\t\t}\n\n\t\tif ( arguments.length < setter ) {\n\t\t\treturn jQuery.queue( this[ 0 ], type );\n\t\t}\n\n\t\treturn data === undefined ?\n\t\t\tthis :\n\t\t\tthis.each( function() {\n\t\t\t\tvar queue = jQuery.queue( this, type, data );\n\n\t\t\t\t// Ensure a hooks for this queue\n\t\t\t\tjQuery._queueHooks( this, type );\n\n\t\t\t\tif ( type === \"fx\" && queue[ 0 ] !== \"inprogress\" ) {\n\t\t\t\t\tjQuery.dequeue( this, type );\n\t\t\t\t}\n\t\t\t} );\n\t},\n\tdequeue: function( type ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.dequeue( this, type );\n\t\t} );\n\t},\n\tclearQueue: function( type ) {\n\t\treturn this.queue( type || \"fx\", [] );\n\t},\n\n\t// Get a promise resolved when queues of a certain type\n\t// are emptied (fx is the type by default)\n\tpromise: function( type, obj ) {\n\t\tvar tmp,\n\t\t\tcount = 1,\n\t\t\tdefer = jQuery.Deferred(),\n\t\t\telements = this,\n\t\t\ti = this.length,\n\t\t\tresolve = function() {\n\t\t\t\tif ( !( --count ) ) {\n\t\t\t\t\tdefer.resolveWith( elements, [ elements ] );\n\t\t\t\t}\n\t\t\t};\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tobj = type;\n\t\t\ttype = undefined;\n\t\t}\n\t\ttype = type || \"fx\";\n\n\t\twhile ( i-- ) {\n\t\t\ttmp = dataPriv.get( elements[ i ], type + \"queueHooks\" );\n\t\t\tif ( tmp && tmp.empty ) {\n\t\t\t\tcount++;\n\t\t\t\ttmp.empty.add( resolve );\n\t\t\t}\n\t\t}\n\t\tresolve();\n\t\treturn defer.promise( obj );\n\t}\n} );\nvar pnum = ( /[+-]?(?:\\d*\\.|)\\d+(?:[eE][+-]?\\d+|)/ ).source;\n\nvar rcssNum = new RegExp( \"^(?:([+-])=|)(\" + pnum + \")([a-z%]*)$\", \"i\" );\n\n\nvar cssExpand = [ \"Top\", \"Right\", \"Bottom\", \"Left\" ];\n\nvar documentElement = document.documentElement;\n\n\n\n\tvar isAttached = function( elem ) {\n\t\t\treturn jQuery.contains( elem.ownerDocument, elem );\n\t\t},\n\t\tcomposed = { composed: true };\n\n\t// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only\n\t// Check attachment across shadow DOM boundaries when possible (gh-3504)\n\t// Support: iOS 10.0-10.2 only\n\t// Early iOS 10 versions support `attachShadow` but not `getRootNode`,\n\t// leading to errors. We need to check for `getRootNode`.\n\tif ( documentElement.getRootNode ) {\n\t\tisAttached = function( elem ) {\n\t\t\treturn jQuery.contains( elem.ownerDocument, elem ) ||\n\t\t\t\telem.getRootNode( composed ) === elem.ownerDocument;\n\t\t};\n\t}\nvar isHiddenWithinTree = function( elem, el ) {\n\n\t\t// isHiddenWithinTree might be called from jQuery#filter function;\n\t\t// in that case, element will be second argument\n\t\telem = el || elem;\n\n\t\t// Inline style trumps all\n\t\treturn elem.style.display === \"none\" ||\n\t\t\telem.style.display === \"\" &&\n\n\t\t\t// Otherwise, check computed style\n\t\t\t// Support: Firefox <=43 - 45\n\t\t\t// Disconnected elements can have computed display: none, so first confirm that elem is\n\t\t\t// in the document.\n\t\t\tisAttached( elem ) &&\n\n\t\t\tjQuery.css( elem, \"display\" ) === \"none\";\n\t};\n\nvar swap = function( elem, options, callback, args ) {\n\tvar ret, name,\n\t\told = {};\n\n\t// Remember the old values, and insert the new ones\n\tfor ( name in options ) {\n\t\told[ name ] = elem.style[ name ];\n\t\telem.style[ name ] = options[ name ];\n\t}\n\n\tret = callback.apply( elem, args || [] );\n\n\t// Revert the old values\n\tfor ( name in options ) {\n\t\telem.style[ name ] = old[ name ];\n\t}\n\n\treturn ret;\n};\n\n\n\n\nfunction adjustCSS( elem, prop, valueParts, tween ) {\n\tvar adjusted, scale,\n\t\tmaxIterations = 20,\n\t\tcurrentValue = tween ?\n\t\t\tfunction() {\n\t\t\t\treturn tween.cur();\n\t\t\t} :\n\t\t\tfunction() {\n\t\t\t\treturn jQuery.css( elem, prop, \"\" );\n\t\t\t},\n\t\tinitial = currentValue(),\n\t\tunit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? \"\" : \"px\" ),\n\n\t\t// Starting value computation is required for potential unit mismatches\n\t\tinitialInUnit = elem.nodeType &&\n\t\t\t( jQuery.cssNumber[ prop ] || unit !== \"px\" && +initial ) &&\n\t\t\trcssNum.exec( jQuery.css( elem, prop ) );\n\n\tif ( initialInUnit && initialInUnit[ 3 ] !== unit ) {\n\n\t\t// Support: Firefox <=54\n\t\t// Halve the iteration target value to prevent interference from CSS upper bounds (gh-2144)\n\t\tinitial = initial / 2;\n\n\t\t// Trust units reported by jQuery.css\n\t\tunit = unit || initialInUnit[ 3 ];\n\n\t\t// Iteratively approximate from a nonzero starting point\n\t\tinitialInUnit = +initial || 1;\n\n\t\twhile ( maxIterations-- ) {\n\n\t\t\t// Evaluate and update our best guess (doubling guesses that zero out).\n\t\t\t// Finish if the scale equals or crosses 1 (making the old*new product non-positive).\n\t\t\tjQuery.style( elem, prop, initialInUnit + unit );\n\t\t\tif ( ( 1 - scale ) * ( 1 - ( scale = currentValue() / initial || 0.5 ) ) <= 0 ) {\n\t\t\t\tmaxIterations = 0;\n\t\t\t}\n\t\t\tinitialInUnit = initialInUnit / scale;\n\n\t\t}\n\n\t\tinitialInUnit = initialInUnit * 2;\n\t\tjQuery.style( elem, prop, initialInUnit + unit );\n\n\t\t// Make sure we update the tween properties later on\n\t\tvalueParts = valueParts || [];\n\t}\n\n\tif ( valueParts ) {\n\t\tinitialInUnit = +initialInUnit || +initial || 0;\n\n\t\t// Apply relative offset (+=/-=) if specified\n\t\tadjusted = valueParts[ 1 ] ?\n\t\t\tinitialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :\n\t\t\t+valueParts[ 2 ];\n\t\tif ( tween ) {\n\t\t\ttween.unit = unit;\n\t\t\ttween.start = initialInUnit;\n\t\t\ttween.end = adjusted;\n\t\t}\n\t}\n\treturn adjusted;\n}\n\n\nvar defaultDisplayMap = {};\n\nfunction getDefaultDisplay( elem ) {\n\tvar temp,\n\t\tdoc = elem.ownerDocument,\n\t\tnodeName = elem.nodeName,\n\t\tdisplay = defaultDisplayMap[ nodeName ];\n\n\tif ( display ) {\n\t\treturn display;\n\t}\n\n\ttemp = doc.body.appendChild( doc.createElement( nodeName ) );\n\tdisplay = jQuery.css( temp, \"display\" );\n\n\ttemp.parentNode.removeChild( temp );\n\n\tif ( display === \"none\" ) {\n\t\tdisplay = \"block\";\n\t}\n\tdefaultDisplayMap[ nodeName ] = display;\n\n\treturn display;\n}\n\nfunction showHide( elements, show ) {\n\tvar display, elem,\n\t\tvalues = [],\n\t\tindex = 0,\n\t\tlength = elements.length;\n\n\t// Determine new display value for elements that need to change\n\tfor ( ; index < length; index++ ) {\n\t\telem = elements[ index ];\n\t\tif ( !elem.style ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tdisplay = elem.style.display;\n\t\tif ( show ) {\n\n\t\t\t// Since we force visibility upon cascade-hidden elements, an immediate (and slow)\n\t\t\t// check is required in this first loop unless we have a nonempty display value (either\n\t\t\t// inline or about-to-be-restored)\n\t\t\tif ( display === \"none\" ) {\n\t\t\t\tvalues[ index ] = dataPriv.get( elem, \"display\" ) || null;\n\t\t\t\tif ( !values[ index ] ) {\n\t\t\t\t\telem.style.display = \"\";\n\t\t\t\t}\n\t\t\t}\n\t\t\tif ( elem.style.display === \"\" && isHiddenWithinTree( elem ) ) {\n\t\t\t\tvalues[ index ] = getDefaultDisplay( elem );\n\t\t\t}\n\t\t} else {\n\t\t\tif ( display !== \"none\" ) {\n\t\t\t\tvalues[ index ] = \"none\";\n\n\t\t\t\t// Remember what we're overwriting\n\t\t\t\tdataPriv.set( elem, \"display\", display );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Set the display of the elements in a second loop to avoid constant reflow\n\tfor ( index = 0; index < length; index++ ) {\n\t\tif ( values[ index ] != null ) {\n\t\t\telements[ index ].style.display = values[ index ];\n\t\t}\n\t}\n\n\treturn elements;\n}\n\njQuery.fn.extend( {\n\tshow: function() {\n\t\treturn showHide( this, true );\n\t},\n\thide: function() {\n\t\treturn showHide( this );\n\t},\n\ttoggle: function( state ) {\n\t\tif ( typeof state === \"boolean\" ) {\n\t\t\treturn state ? this.show() : this.hide();\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tif ( isHiddenWithinTree( this ) ) {\n\t\t\t\tjQuery( this ).show();\n\t\t\t} else {\n\t\t\t\tjQuery( this ).hide();\n\t\t\t}\n\t\t} );\n\t}\n} );\nvar rcheckableType = ( /^(?:checkbox|radio)$/i );\n\nvar rtagName = ( /<([a-z][^\\/\\0>\\x20\\t\\r\\n\\f]*)/i );\n\nvar rscriptType = ( /^$|^module$|\\/(?:java|ecma)script/i );\n\n\n\n// We have to close these tags to support XHTML (#13200)\nvar wrapMap = {\n\n\t// Support: IE <=9 only\n\toption: [ 1, \"<select multiple='multiple'>\", \"</select>\" ],\n\n\t// XHTML parsers do not magically insert elements in the\n\t// same way that tag soup parsers do. So we cannot shorten\n\t// this by omitting <tbody> or other required elements.\n\tthead: [ 1, \"<table>\", \"</table>\" ],\n\tcol: [ 2, \"<table><colgroup>\", \"</colgroup></table>\" ],\n\ttr: [ 2, \"<table><tbody>\", \"</tbody></table>\" ],\n\ttd: [ 3, \"<table><tbody><tr>\", \"</tr></tbody></table>\" ],\n\n\t_default: [ 0, \"\", \"\" ]\n};\n\n// Support: IE <=9 only\nwrapMap.optgroup = wrapMap.option;\n\nwrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;\nwrapMap.th = wrapMap.td;\n\n\nfunction getAll( context, tag ) {\n\n\t// Support: IE <=9 - 11 only\n\t// Use typeof to avoid zero-argument method invocation on host objects (#15151)\n\tvar ret;\n\n\tif ( typeof context.getElementsByTagName !== \"undefined\" ) {\n\t\tret = context.getElementsByTagName( tag || \"*\" );\n\n\t} else if ( typeof context.querySelectorAll !== \"undefined\" ) {\n\t\tret = context.querySelectorAll( tag || \"*\" );\n\n\t} else {\n\t\tret = [];\n\t}\n\n\tif ( tag === undefined || tag && nodeName( context, tag ) ) {\n\t\treturn jQuery.merge( [ context ], ret );\n\t}\n\n\treturn ret;\n}\n\n\n// Mark scripts as having already been evaluated\nfunction setGlobalEval( elems, refElements ) {\n\tvar i = 0,\n\t\tl = elems.length;\n\n\tfor ( ; i < l; i++ ) {\n\t\tdataPriv.set(\n\t\t\telems[ i ],\n\t\t\t\"globalEval\",\n\t\t\t!refElements || dataPriv.get( refElements[ i ], \"globalEval\" )\n\t\t);\n\t}\n}\n\n\nvar rhtml = /<|&#?\\w+;/;\n\nfunction buildFragment( elems, context, scripts, selection, ignored ) {\n\tvar elem, tmp, tag, wrap, attached, j,\n\t\tfragment = context.createDocumentFragment(),\n\t\tnodes = [],\n\t\ti = 0,\n\t\tl = elems.length;\n\n\tfor ( ; i < l; i++ ) {\n\t\telem = elems[ i ];\n\n\t\tif ( elem || elem === 0 ) {\n\n\t\t\t// Add nodes directly\n\t\t\tif ( toType( elem ) === \"object\" ) {\n\n\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\tjQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );\n\n\t\t\t// Convert non-html into a text node\n\t\t\t} else if ( !rhtml.test( elem ) ) {\n\t\t\t\tnodes.push( context.createTextNode( elem ) );\n\n\t\t\t// Convert html into DOM nodes\n\t\t\t} else {\n\t\t\t\ttmp = tmp || fragment.appendChild( context.createElement( \"div\" ) );\n\n\t\t\t\t// Deserialize a standard representation\n\t\t\t\ttag = ( rtagName.exec( elem ) || [ \"\", \"\" ] )[ 1 ].toLowerCase();\n\t\t\t\twrap = wrapMap[ tag ] || wrapMap._default;\n\t\t\t\ttmp.innerHTML = wrap[ 1 ] + jQuery.htmlPrefilter( elem ) + wrap[ 2 ];\n\n\t\t\t\t// Descend through wrappers to the right content\n\t\t\t\tj = wrap[ 0 ];\n\t\t\t\twhile ( j-- ) {\n\t\t\t\t\ttmp = tmp.lastChild;\n\t\t\t\t}\n\n\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\tjQuery.merge( nodes, tmp.childNodes );\n\n\t\t\t\t// Remember the top-level container\n\t\t\t\ttmp = fragment.firstChild;\n\n\t\t\t\t// Ensure the created nodes are orphaned (#12392)\n\t\t\t\ttmp.textContent = \"\";\n\t\t\t}\n\t\t}\n\t}\n\n\t// Remove wrapper from fragment\n\tfragment.textContent = \"\";\n\n\ti = 0;\n\twhile ( ( elem = nodes[ i++ ] ) ) {\n\n\t\t// Skip elements already in the context collection (trac-4087)\n\t\tif ( selection && jQuery.inArray( elem, selection ) > -1 ) {\n\t\t\tif ( ignored ) {\n\t\t\t\tignored.push( elem );\n\t\t\t}\n\t\t\tcontinue;\n\t\t}\n\n\t\tattached = isAttached( elem );\n\n\t\t// Append to fragment\n\t\ttmp = getAll( fragment.appendChild( elem ), \"script\" );\n\n\t\t// Preserve script evaluation history\n\t\tif ( attached ) {\n\t\t\tsetGlobalEval( tmp );\n\t\t}\n\n\t\t// Capture executables\n\t\tif ( scripts ) {\n\t\t\tj = 0;\n\t\t\twhile ( ( elem = tmp[ j++ ] ) ) {\n\t\t\t\tif ( rscriptType.test( elem.type || \"\" ) ) {\n\t\t\t\t\tscripts.push( elem );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn fragment;\n}\n\n\n( function() {\n\tvar fragment = document.createDocumentFragment(),\n\t\tdiv = fragment.appendChild( document.createElement( \"div\" ) ),\n\t\tinput = document.createElement( \"input\" );\n\n\t// Support: Android 4.0 - 4.3 only\n\t// Check state lost if the name is set (#11217)\n\t// Support: Windows Web Apps (WWA)\n\t// `name` and `type` must use .setAttribute for WWA (#14901)\n\tinput.setAttribute( \"type\", \"radio\" );\n\tinput.setAttribute( \"checked\", \"checked\" );\n\tinput.setAttribute( \"name\", \"t\" );\n\n\tdiv.appendChild( input );\n\n\t// Support: Android <=4.1 only\n\t// Older WebKit doesn't clone checked state correctly in fragments\n\tsupport.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;\n\n\t// Support: IE <=11 only\n\t// Make sure textarea (and checkbox) defaultValue is properly cloned\n\tdiv.innerHTML = \"<textarea>x</textarea>\";\n\tsupport.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;\n} )();\n\n\nvar\n\trkeyEvent = /^key/,\n\trmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,\n\trtypenamespace = /^([^.]*)(?:\\.(.+)|)/;\n\nfunction returnTrue() {\n\treturn true;\n}\n\nfunction returnFalse() {\n\treturn false;\n}\n\n// Support: IE <=9 - 11+\n// focus() and blur() are asynchronous, except when they are no-op.\n// So expect focus to be synchronous when the element is already active,\n// and blur to be synchronous when the element is not already active.\n// (focus and blur are always synchronous in other supported browsers,\n// this just defines when we can count on it).\nfunction expectSync( elem, type ) {\n\treturn ( elem === safeActiveElement() ) === ( type === \"focus\" );\n}\n\n// Support: IE <=9 only\n// Accessing document.activeElement can throw unexpectedly\n// https://bugs.jquery.com/ticket/13393\nfunction safeActiveElement() {\n\ttry {\n\t\treturn document.activeElement;\n\t} catch ( err ) { }\n}\n\nfunction on( elem, types, selector, data, fn, one ) {\n\tvar origFn, type;\n\n\t// Types can be a map of types/handlers\n\tif ( typeof types === \"object\" ) {\n\n\t\t// ( types-Object, selector, data )\n\t\tif ( typeof selector !== \"string\" ) {\n\n\t\t\t// ( types-Object, data )\n\t\t\tdata = data || selector;\n\t\t\tselector = undefined;\n\t\t}\n\t\tfor ( type in types ) {\n\t\t\ton( elem, type, selector, data, types[ type ], one );\n\t\t}\n\t\treturn elem;\n\t}\n\n\tif ( data == null && fn == null ) {\n\n\t\t// ( types, fn )\n\t\tfn = selector;\n\t\tdata = selector = undefined;\n\t} else if ( fn == null ) {\n\t\tif ( typeof selector === \"string\" ) {\n\n\t\t\t// ( types, selector, fn )\n\t\t\tfn = data;\n\t\t\tdata = undefined;\n\t\t} else {\n\n\t\t\t// ( types, data, fn )\n\t\t\tfn = data;\n\t\t\tdata = selector;\n\t\t\tselector = undefined;\n\t\t}\n\t}\n\tif ( fn === false ) {\n\t\tfn = returnFalse;\n\t} else if ( !fn ) {\n\t\treturn elem;\n\t}\n\n\tif ( one === 1 ) {\n\t\torigFn = fn;\n\t\tfn = function( event ) {\n\n\t\t\t// Can use an empty set, since event contains the info\n\t\t\tjQuery().off( event );\n\t\t\treturn origFn.apply( this, arguments );\n\t\t};\n\n\t\t// Use same guid so caller can remove using origFn\n\t\tfn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );\n\t}\n\treturn elem.each( function() {\n\t\tjQuery.event.add( this, types, fn, data, selector );\n\t} );\n}\n\n/*\n * Helper functions for managing events -- not part of the public interface.\n * Props to Dean Edwards' addEvent library for many of the ideas.\n */\njQuery.event = {\n\n\tglobal: {},\n\n\tadd: function( elem, types, handler, data, selector ) {\n\n\t\tvar handleObjIn, eventHandle, tmp,\n\t\t\tevents, t, handleObj,\n\t\t\tspecial, handlers, type, namespaces, origType,\n\t\t\telemData = dataPriv.get( elem );\n\n\t\t// Don't attach events to noData or text/comment nodes (but allow plain objects)\n\t\tif ( !elemData ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Caller can pass in an object of custom data in lieu of the handler\n\t\tif ( handler.handler ) {\n\t\t\thandleObjIn = handler;\n\t\t\thandler = handleObjIn.handler;\n\t\t\tselector = handleObjIn.selector;\n\t\t}\n\n\t\t// Ensure that invalid selectors throw exceptions at attach time\n\t\t// Evaluate against documentElement in case elem is a non-element node (e.g., document)\n\t\tif ( selector ) {\n\t\t\tjQuery.find.matchesSelector( documentElement, selector );\n\t\t}\n\n\t\t// Make sure that the handler has a unique ID, used to find/remove it later\n\t\tif ( !handler.guid ) {\n\t\t\thandler.guid = jQuery.guid++;\n\t\t}\n\n\t\t// Init the element's event structure and main handler, if this is the first\n\t\tif ( !( events = elemData.events ) ) {\n\t\t\tevents = elemData.events = {};\n\t\t}\n\t\tif ( !( eventHandle = elemData.handle ) ) {\n\t\t\teventHandle = elemData.handle = function( e ) {\n\n\t\t\t\t// Discard the second event of a jQuery.event.trigger() and\n\t\t\t\t// when an event is called after a page has unloaded\n\t\t\t\treturn typeof jQuery !== \"undefined\" && jQuery.event.triggered !== e.type ?\n\t\t\t\t\tjQuery.event.dispatch.apply( elem, arguments ) : undefined;\n\t\t\t};\n\t\t}\n\n\t\t// Handle multiple events separated by a space\n\t\ttypes = ( types || \"\" ).match( rnothtmlwhite ) || [ \"\" ];\n\t\tt = types.length;\n\t\twhile ( t-- ) {\n\t\t\ttmp = rtypenamespace.exec( types[ t ] ) || [];\n\t\t\ttype = origType = tmp[ 1 ];\n\t\t\tnamespaces = ( tmp[ 2 ] || \"\" ).split( \".\" ).sort();\n\n\t\t\t// There *must* be a type, no attaching namespace-only handlers\n\t\t\tif ( !type ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If event changes its type, use the special event handlers for the changed type\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\n\t\t\t// If selector defined, determine special event api type, otherwise given type\n\t\t\ttype = ( selector ? special.delegateType : special.bindType ) || type;\n\n\t\t\t// Update special based on newly reset type\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\n\t\t\t// handleObj is passed to all event handlers\n\t\t\thandleObj = jQuery.extend( {\n\t\t\t\ttype: type,\n\t\t\t\torigType: origType,\n\t\t\t\tdata: data,\n\t\t\t\thandler: handler,\n\t\t\t\tguid: handler.guid,\n\t\t\t\tselector: selector,\n\t\t\t\tneedsContext: selector && jQuery.expr.match.needsContext.test( selector ),\n\t\t\t\tnamespace: namespaces.join( \".\" )\n\t\t\t}, handleObjIn );\n\n\t\t\t// Init the event handler queue if we're the first\n\t\t\tif ( !( handlers = events[ type ] ) ) {\n\t\t\t\thandlers = events[ type ] = [];\n\t\t\t\thandlers.delegateCount = 0;\n\n\t\t\t\t// Only use addEventListener if the special events handler returns false\n\t\t\t\tif ( !special.setup ||\n\t\t\t\t\tspecial.setup.call( elem, data, namespaces, eventHandle ) === false ) {\n\n\t\t\t\t\tif ( elem.addEventListener ) {\n\t\t\t\t\t\telem.addEventListener( type, eventHandle );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( special.add ) {\n\t\t\t\tspecial.add.call( elem, handleObj );\n\n\t\t\t\tif ( !handleObj.handler.guid ) {\n\t\t\t\t\thandleObj.handler.guid = handler.guid;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add to the element's handler list, delegates in front\n\t\t\tif ( selector ) {\n\t\t\t\thandlers.splice( handlers.delegateCount++, 0, handleObj );\n\t\t\t} else {\n\t\t\t\thandlers.push( handleObj );\n\t\t\t}\n\n\t\t\t// Keep track of which events have ever been used, for event optimization\n\t\t\tjQuery.event.global[ type ] = true;\n\t\t}\n\n\t},\n\n\t// Detach an event or set of events from an element\n\tremove: function( elem, types, handler, selector, mappedTypes ) {\n\n\t\tvar j, origCount, tmp,\n\t\t\tevents, t, handleObj,\n\t\t\tspecial, handlers, type, namespaces, origType,\n\t\t\telemData = dataPriv.hasData( elem ) && dataPriv.get( elem );\n\n\t\tif ( !elemData || !( events = elemData.events ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Once for each type.namespace in types; type may be omitted\n\t\ttypes = ( types || \"\" ).match( rnothtmlwhite ) || [ \"\" ];\n\t\tt = types.length;\n\t\twhile ( t-- ) {\n\t\t\ttmp = rtypenamespace.exec( types[ t ] ) || [];\n\t\t\ttype = origType = tmp[ 1 ];\n\t\t\tnamespaces = ( tmp[ 2 ] || \"\" ).split( \".\" ).sort();\n\n\t\t\t// Unbind all events (on this namespace, if provided) for the element\n\t\t\tif ( !type ) {\n\t\t\t\tfor ( type in events ) {\n\t\t\t\t\tjQuery.event.remove( elem, type + types[ t ], handler, selector, true );\n\t\t\t\t}\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tspecial = jQuery.event.special[ type ] || {};\n\t\t\ttype = ( selector ? special.delegateType : special.bindType ) || type;\n\t\t\thandlers = events[ type ] || [];\n\t\t\ttmp = tmp[ 2 ] &&\n\t\t\t\tnew RegExp( \"(^|\\\\.)\" + namespaces.join( \"\\\\.(?:.*\\\\.|)\" ) + \"(\\\\.|$)\" );\n\n\t\t\t// Remove matching events\n\t\t\torigCount = j = handlers.length;\n\t\t\twhile ( j-- ) {\n\t\t\t\thandleObj = handlers[ j ];\n\n\t\t\t\tif ( ( mappedTypes || origType === handleObj.origType ) &&\n\t\t\t\t\t( !handler || handler.guid === handleObj.guid ) &&\n\t\t\t\t\t( !tmp || tmp.test( handleObj.namespace ) ) &&\n\t\t\t\t\t( !selector || selector === handleObj.selector ||\n\t\t\t\t\t\tselector === \"**\" && handleObj.selector ) ) {\n\t\t\t\t\thandlers.splice( j, 1 );\n\n\t\t\t\t\tif ( handleObj.selector ) {\n\t\t\t\t\t\thandlers.delegateCount--;\n\t\t\t\t\t}\n\t\t\t\t\tif ( special.remove ) {\n\t\t\t\t\t\tspecial.remove.call( elem, handleObj );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Remove generic event handler if we removed something and no more handlers exist\n\t\t\t// (avoids potential for endless recursion during removal of special event handlers)\n\t\t\tif ( origCount && !handlers.length ) {\n\t\t\t\tif ( !special.teardown ||\n\t\t\t\t\tspecial.teardown.call( elem, namespaces, elemData.handle ) === false ) {\n\n\t\t\t\t\tjQuery.removeEvent( elem, type, elemData.handle );\n\t\t\t\t}\n\n\t\t\t\tdelete events[ type ];\n\t\t\t}\n\t\t}\n\n\t\t// Remove data and the expando if it's no longer used\n\t\tif ( jQuery.isEmptyObject( events ) ) {\n\t\t\tdataPriv.remove( elem, \"handle events\" );\n\t\t}\n\t},\n\n\tdispatch: function( nativeEvent ) {\n\n\t\t// Make a writable jQuery.Event from the native event object\n\t\tvar event = jQuery.event.fix( nativeEvent );\n\n\t\tvar i, j, ret, matched, handleObj, handlerQueue,\n\t\t\targs = new Array( arguments.length ),\n\t\t\thandlers = ( dataPriv.get( this, \"events\" ) || {} )[ event.type ] || [],\n\t\t\tspecial = jQuery.event.special[ event.type ] || {};\n\n\t\t// Use the fix-ed jQuery.Event rather than the (read-only) native event\n\t\targs[ 0 ] = event;\n\n\t\tfor ( i = 1; i < arguments.length; i++ ) {\n\t\t\targs[ i ] = arguments[ i ];\n\t\t}\n\n\t\tevent.delegateTarget = this;\n\n\t\t// Call the preDispatch hook for the mapped type, and let it bail if desired\n\t\tif ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Determine handlers\n\t\thandlerQueue = jQuery.event.handlers.call( this, event, handlers );\n\n\t\t// Run delegates first; they may want to stop propagation beneath us\n\t\ti = 0;\n\t\twhile ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {\n\t\t\tevent.currentTarget = matched.elem;\n\n\t\t\tj = 0;\n\t\t\twhile ( ( handleObj = matched.handlers[ j++ ] ) &&\n\t\t\t\t!event.isImmediatePropagationStopped() ) {\n\n\t\t\t\t// If the event is namespaced, then each handler is only invoked if it is\n\t\t\t\t// specially universal or its namespaces are a superset of the event's.\n\t\t\t\tif ( !event.rnamespace || handleObj.namespace === false ||\n\t\t\t\t\tevent.rnamespace.test( handleObj.namespace ) ) {\n\n\t\t\t\t\tevent.handleObj = handleObj;\n\t\t\t\t\tevent.data = handleObj.data;\n\n\t\t\t\t\tret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||\n\t\t\t\t\t\thandleObj.handler ).apply( matched.elem, args );\n\n\t\t\t\t\tif ( ret !== undefined ) {\n\t\t\t\t\t\tif ( ( event.result = ret ) === false ) {\n\t\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\t\tevent.stopPropagation();\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Call the postDispatch hook for the mapped type\n\t\tif ( special.postDispatch ) {\n\t\t\tspecial.postDispatch.call( this, event );\n\t\t}\n\n\t\treturn event.result;\n\t},\n\n\thandlers: function( event, handlers ) {\n\t\tvar i, handleObj, sel, matchedHandlers, matchedSelectors,\n\t\t\thandlerQueue = [],\n\t\t\tdelegateCount = handlers.delegateCount,\n\t\t\tcur = event.target;\n\n\t\t// Find delegate handlers\n\t\tif ( delegateCount &&\n\n\t\t\t// Support: IE <=9\n\t\t\t// Black-hole SVG <use> instance trees (trac-13180)\n\t\t\tcur.nodeType &&\n\n\t\t\t// Support: Firefox <=42\n\t\t\t// Suppress spec-violating clicks indicating a non-primary pointer button (trac-3861)\n\t\t\t// https://www.w3.org/TR/DOM-Level-3-Events/#event-type-click\n\t\t\t// Support: IE 11 only\n\t\t\t// ...but not arrow key \"clicks\" of radio inputs, which can have `button` -1 (gh-2343)\n\t\t\t!( event.type === \"click\" && event.button >= 1 ) ) {\n\n\t\t\tfor ( ; cur !== this; cur = cur.parentNode || this ) {\n\n\t\t\t\t// Don't check non-elements (#13208)\n\t\t\t\t// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)\n\t\t\t\tif ( cur.nodeType === 1 && !( event.type === \"click\" && cur.disabled === true ) ) {\n\t\t\t\t\tmatchedHandlers = [];\n\t\t\t\t\tmatchedSelectors = {};\n\t\t\t\t\tfor ( i = 0; i < delegateCount; i++ ) {\n\t\t\t\t\t\thandleObj = handlers[ i ];\n\n\t\t\t\t\t\t// Don't conflict with Object.prototype properties (#13203)\n\t\t\t\t\t\tsel = handleObj.selector + \" \";\n\n\t\t\t\t\t\tif ( matchedSelectors[ sel ] === undefined ) {\n\t\t\t\t\t\t\tmatchedSelectors[ sel ] = handleObj.needsContext ?\n\t\t\t\t\t\t\t\tjQuery( sel, this ).index( cur ) > -1 :\n\t\t\t\t\t\t\t\tjQuery.find( sel, this, null, [ cur ] ).length;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif ( matchedSelectors[ sel ] ) {\n\t\t\t\t\t\t\tmatchedHandlers.push( handleObj );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif ( matchedHandlers.length ) {\n\t\t\t\t\t\thandlerQueue.push( { elem: cur, handlers: matchedHandlers } );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Add the remaining (directly-bound) handlers\n\t\tcur = this;\n\t\tif ( delegateCount < handlers.length ) {\n\t\t\thandlerQueue.push( { elem: cur, handlers: handlers.slice( delegateCount ) } );\n\t\t}\n\n\t\treturn handlerQueue;\n\t},\n\n\taddProp: function( name, hook ) {\n\t\tObject.defineProperty( jQuery.Event.prototype, name, {\n\t\t\tenumerable: true,\n\t\t\tconfigurable: true,\n\n\t\t\tget: isFunction( hook ) ?\n\t\t\t\tfunction() {\n\t\t\t\t\tif ( this.originalEvent ) {\n\t\t\t\t\t\t\treturn hook( this.originalEvent );\n\t\t\t\t\t}\n\t\t\t\t} :\n\t\t\t\tfunction() {\n\t\t\t\t\tif ( this.originalEvent ) {\n\t\t\t\t\t\t\treturn this.originalEvent[ name ];\n\t\t\t\t\t}\n\t\t\t\t},\n\n\t\t\tset: function( value ) {\n\t\t\t\tObject.defineProperty( this, name, {\n\t\t\t\t\tenumerable: true,\n\t\t\t\t\tconfigurable: true,\n\t\t\t\t\twritable: true,\n\t\t\t\t\tvalue: value\n\t\t\t\t} );\n\t\t\t}\n\t\t} );\n\t},\n\n\tfix: function( originalEvent ) {\n\t\treturn originalEvent[ jQuery.expando ] ?\n\t\t\toriginalEvent :\n\t\t\tnew jQuery.Event( originalEvent );\n\t},\n\n\tspecial: {\n\t\tload: {\n\n\t\t\t// Prevent triggered image.load events from bubbling to window.load\n\t\t\tnoBubble: true\n\t\t},\n\t\tclick: {\n\n\t\t\t// Utilize native event to ensure correct state for checkable inputs\n\t\t\tsetup: function( data ) {\n\n\t\t\t\t// For mutual compressibility with _default, replace `this` access with a local var.\n\t\t\t\t// `|| data` is dead code meant only to preserve the variable through minification.\n\t\t\t\tvar el = this || data;\n\n\t\t\t\t// Claim the first handler\n\t\t\t\tif ( rcheckableType.test( el.type ) &&\n\t\t\t\t\tel.click && nodeName( el, \"input\" ) ) {\n\n\t\t\t\t\t// dataPriv.set( el, \"click\", ... )\n\t\t\t\t\tleverageNative( el, \"click\", returnTrue );\n\t\t\t\t}\n\n\t\t\t\t// Return false to allow normal processing in the caller\n\t\t\t\treturn false;\n\t\t\t},\n\t\t\ttrigger: function( data ) {\n\n\t\t\t\t// For mutual compressibility with _default, replace `this` access with a local var.\n\t\t\t\t// `|| data` is dead code meant only to preserve the variable through minification.\n\t\t\t\tvar el = this || data;\n\n\t\t\t\t// Force setup before triggering a click\n\t\t\t\tif ( rcheckableType.test( el.type ) &&\n\t\t\t\t\tel.click && nodeName( el, \"input\" ) ) {\n\n\t\t\t\t\tleverageNative( el, \"click\" );\n\t\t\t\t}\n\n\t\t\t\t// Return non-false to allow normal event-path propagation\n\t\t\t\treturn true;\n\t\t\t},\n\n\t\t\t// For cross-browser consistency, suppress native .click() on links\n\t\t\t// Also prevent it if we're currently inside a leveraged native-event stack\n\t\t\t_default: function( event ) {\n\t\t\t\tvar target = event.target;\n\t\t\t\treturn rcheckableType.test( target.type ) &&\n\t\t\t\t\ttarget.click && nodeName( target, \"input\" ) &&\n\t\t\t\t\tdataPriv.get( target, \"click\" ) ||\n\t\t\t\t\tnodeName( target, \"a\" );\n\t\t\t}\n\t\t},\n\n\t\tbeforeunload: {\n\t\t\tpostDispatch: function( event ) {\n\n\t\t\t\t// Support: Firefox 20+\n\t\t\t\t// Firefox doesn't alert if the returnValue field is not set.\n\t\t\t\tif ( event.result !== undefined && event.originalEvent ) {\n\t\t\t\t\tevent.originalEvent.returnValue = event.result;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n};\n\n// Ensure the presence of an event listener that handles manually-triggered\n// synthetic events by interrupting progress until reinvoked in response to\n// *native* events that it fires directly, ensuring that state changes have\n// already occurred before other listeners are invoked.\nfunction leverageNative( el, type, expectSync ) {\n\n\t// Missing expectSync indicates a trigger call, which must force setup through jQuery.event.add\n\tif ( !expectSync ) {\n\t\tif ( dataPriv.get( el, type ) === undefined ) {\n\t\t\tjQuery.event.add( el, type, returnTrue );\n\t\t}\n\t\treturn;\n\t}\n\n\t// Register the controller as a special universal handler for all event namespaces\n\tdataPriv.set( el, type, false );\n\tjQuery.event.add( el, type, {\n\t\tnamespace: false,\n\t\thandler: function( event ) {\n\t\t\tvar notAsync, result,\n\t\t\t\tsaved = dataPriv.get( this, type );\n\n\t\t\tif ( ( event.isTrigger & 1 ) && this[ type ] ) {\n\n\t\t\t\t// Interrupt processing of the outer synthetic .trigger()ed event\n\t\t\t\t// Saved data should be false in such cases, but might be a leftover capture object\n\t\t\t\t// from an async native handler (gh-4350)\n\t\t\t\tif ( !saved.length ) {\n\n\t\t\t\t\t// Store arguments for use when handling the inner native event\n\t\t\t\t\t// There will always be at least one argument (an event object), so this array\n\t\t\t\t\t// will not be confused with a leftover capture object.\n\t\t\t\t\tsaved = slice.call( arguments );\n\t\t\t\t\tdataPriv.set( this, type, saved );\n\n\t\t\t\t\t// Trigger the native event and capture its result\n\t\t\t\t\t// Support: IE <=9 - 11+\n\t\t\t\t\t// focus() and blur() are asynchronous\n\t\t\t\t\tnotAsync = expectSync( this, type );\n\t\t\t\t\tthis[ type ]();\n\t\t\t\t\tresult = dataPriv.get( this, type );\n\t\t\t\t\tif ( saved !== result || notAsync ) {\n\t\t\t\t\t\tdataPriv.set( this, type, false );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tresult = {};\n\t\t\t\t\t}\n\t\t\t\t\tif ( saved !== result ) {\n\n\t\t\t\t\t\t// Cancel the outer synthetic event\n\t\t\t\t\t\tevent.stopImmediatePropagation();\n\t\t\t\t\t\tevent.preventDefault();\n\t\t\t\t\t\treturn result.value;\n\t\t\t\t\t}\n\n\t\t\t\t// If this is an inner synthetic event for an event with a bubbling surrogate\n\t\t\t\t// (focus or blur), assume that the surrogate already propagated from triggering the\n\t\t\t\t// native event and prevent that from happening again here.\n\t\t\t\t// This technically gets the ordering wrong w.r.t. to `.trigger()` (in which the\n\t\t\t\t// bubbling surrogate propagates *after* the non-bubbling base), but that seems\n\t\t\t\t// less bad than duplication.\n\t\t\t\t} else if ( ( jQuery.event.special[ type ] || {} ).delegateType ) {\n\t\t\t\t\tevent.stopPropagation();\n\t\t\t\t}\n\n\t\t\t// If this is a native event triggered above, everything is now in order\n\t\t\t// Fire an inner synthetic event with the original arguments\n\t\t\t} else if ( saved.length ) {\n\n\t\t\t\t// ...and capture the result\n\t\t\t\tdataPriv.set( this, type, {\n\t\t\t\t\tvalue: jQuery.event.trigger(\n\n\t\t\t\t\t\t// Support: IE <=9 - 11+\n\t\t\t\t\t\t// Extend with the prototype to reset the above stopImmediatePropagation()\n\t\t\t\t\t\tjQuery.extend( saved[ 0 ], jQuery.Event.prototype ),\n\t\t\t\t\t\tsaved.slice( 1 ),\n\t\t\t\t\t\tthis\n\t\t\t\t\t)\n\t\t\t\t} );\n\n\t\t\t\t// Abort handling of the native event\n\t\t\t\tevent.stopImmediatePropagation();\n\t\t\t}\n\t\t}\n\t} );\n}\n\njQuery.removeEvent = function( elem, type, handle ) {\n\n\t// This \"if\" is needed for plain objects\n\tif ( elem.removeEventListener ) {\n\t\telem.removeEventListener( type, handle );\n\t}\n};\n\njQuery.Event = function( src, props ) {\n\n\t// Allow instantiation without the 'new' keyword\n\tif ( !( this instanceof jQuery.Event ) ) {\n\t\treturn new jQuery.Event( src, props );\n\t}\n\n\t// Event object\n\tif ( src && src.type ) {\n\t\tthis.originalEvent = src;\n\t\tthis.type = src.type;\n\n\t\t// Events bubbling up the document may have been marked as prevented\n\t\t// by a handler lower down the tree; reflect the correct value.\n\t\tthis.isDefaultPrevented = src.defaultPrevented ||\n\t\t\t\tsrc.defaultPrevented === undefined &&\n\n\t\t\t\t// Support: Android <=2.3 only\n\t\t\t\tsrc.returnValue === false ?\n\t\t\treturnTrue :\n\t\t\treturnFalse;\n\n\t\t// Create target properties\n\t\t// Support: Safari <=6 - 7 only\n\t\t// Target should not be a text node (#504, #13143)\n\t\tthis.target = ( src.target && src.target.nodeType === 3 ) ?\n\t\t\tsrc.target.parentNode :\n\t\t\tsrc.target;\n\n\t\tthis.currentTarget = src.currentTarget;\n\t\tthis.relatedTarget = src.relatedTarget;\n\n\t// Event type\n\t} else {\n\t\tthis.type = src;\n\t}\n\n\t// Put explicitly provided properties onto the event object\n\tif ( props ) {\n\t\tjQuery.extend( this, props );\n\t}\n\n\t// Create a timestamp if incoming event doesn't have one\n\tthis.timeStamp = src && src.timeStamp || Date.now();\n\n\t// Mark it as fixed\n\tthis[ jQuery.expando ] = true;\n};\n\n// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding\n// https://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html\njQuery.Event.prototype = {\n\tconstructor: jQuery.Event,\n\tisDefaultPrevented: returnFalse,\n\tisPropagationStopped: returnFalse,\n\tisImmediatePropagationStopped: returnFalse,\n\tisSimulated: false,\n\n\tpreventDefault: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isDefaultPrevented = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.preventDefault();\n\t\t}\n\t},\n\tstopPropagation: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isPropagationStopped = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.stopPropagation();\n\t\t}\n\t},\n\tstopImmediatePropagation: function() {\n\t\tvar e = this.originalEvent;\n\n\t\tthis.isImmediatePropagationStopped = returnTrue;\n\n\t\tif ( e && !this.isSimulated ) {\n\t\t\te.stopImmediatePropagation();\n\t\t}\n\n\t\tthis.stopPropagation();\n\t}\n};\n\n// Includes all common event props including KeyEvent and MouseEvent specific props\njQuery.each( {\n\taltKey: true,\n\tbubbles: true,\n\tcancelable: true,\n\tchangedTouches: true,\n\tctrlKey: true,\n\tdetail: true,\n\teventPhase: true,\n\tmetaKey: true,\n\tpageX: true,\n\tpageY: true,\n\tshiftKey: true,\n\tview: true,\n\t\"char\": true,\n\tcode: true,\n\tcharCode: true,\n\tkey: true,\n\tkeyCode: true,\n\tbutton: true,\n\tbuttons: true,\n\tclientX: true,\n\tclientY: true,\n\toffsetX: true,\n\toffsetY: true,\n\tpointerId: true,\n\tpointerType: true,\n\tscreenX: true,\n\tscreenY: true,\n\ttargetTouches: true,\n\ttoElement: true,\n\ttouches: true,\n\n\twhich: function( event ) {\n\t\tvar button = event.button;\n\n\t\t// Add which for key events\n\t\tif ( event.which == null && rkeyEvent.test( event.type ) ) {\n\t\t\treturn event.charCode != null ? event.charCode : event.keyCode;\n\t\t}\n\n\t\t// Add which for click: 1 === left; 2 === middle; 3 === right\n\t\tif ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {\n\t\t\tif ( button & 1 ) {\n\t\t\t\treturn 1;\n\t\t\t}\n\n\t\t\tif ( button & 2 ) {\n\t\t\t\treturn 3;\n\t\t\t}\n\n\t\t\tif ( button & 4 ) {\n\t\t\t\treturn 2;\n\t\t\t}\n\n\t\t\treturn 0;\n\t\t}\n\n\t\treturn event.which;\n\t}\n}, jQuery.event.addProp );\n\njQuery.each( { focus: \"focusin\", blur: \"focusout\" }, function( type, delegateType ) {\n\tjQuery.event.special[ type ] = {\n\n\t\t// Utilize native event if possible so blur/focus sequence is correct\n\t\tsetup: function() {\n\n\t\t\t// Claim the first handler\n\t\t\t// dataPriv.set( this, \"focus\", ... )\n\t\t\t// dataPriv.set( this, \"blur\", ... )\n\t\t\tleverageNative( this, type, expectSync );\n\n\t\t\t// Return false to allow normal processing in the caller\n\t\t\treturn false;\n\t\t},\n\t\ttrigger: function() {\n\n\t\t\t// Force setup before trigger\n\t\t\tleverageNative( this, type );\n\n\t\t\t// Return non-false to allow normal event-path propagation\n\t\t\treturn true;\n\t\t},\n\n\t\tdelegateType: delegateType\n\t};\n} );\n\n// Create mouseenter/leave events using mouseover/out and event-time checks\n// so that event delegation works in jQuery.\n// Do the same for pointerenter/pointerleave and pointerover/pointerout\n//\n// Support: Safari 7 only\n// Safari sends mouseenter too often; see:\n// https://bugs.chromium.org/p/chromium/issues/detail?id=470258\n// for the description of the bug (it existed in older Chrome versions as well).\njQuery.each( {\n\tmouseenter: \"mouseover\",\n\tmouseleave: \"mouseout\",\n\tpointerenter: \"pointerover\",\n\tpointerleave: \"pointerout\"\n}, function( orig, fix ) {\n\tjQuery.event.special[ orig ] = {\n\t\tdelegateType: fix,\n\t\tbindType: fix,\n\n\t\thandle: function( event ) {\n\t\t\tvar ret,\n\t\t\t\ttarget = this,\n\t\t\t\trelated = event.relatedTarget,\n\t\t\t\thandleObj = event.handleObj;\n\n\t\t\t// For mouseenter/leave call the handler if related is outside the target.\n\t\t\t// NB: No relatedTarget if the mouse left/entered the browser window\n\t\t\tif ( !related || ( related !== target && !jQuery.contains( target, related ) ) ) {\n\t\t\t\tevent.type = handleObj.origType;\n\t\t\t\tret = handleObj.handler.apply( this, arguments );\n\t\t\t\tevent.type = fix;\n\t\t\t}\n\t\t\treturn ret;\n\t\t}\n\t};\n} );\n\njQuery.fn.extend( {\n\n\ton: function( types, selector, data, fn ) {\n\t\treturn on( this, types, selector, data, fn );\n\t},\n\tone: function( types, selector, data, fn ) {\n\t\treturn on( this, types, selector, data, fn, 1 );\n\t},\n\toff: function( types, selector, fn ) {\n\t\tvar handleObj, type;\n\t\tif ( types && types.preventDefault && types.handleObj ) {\n\n\t\t\t// ( event ) dispatched jQuery.Event\n\t\t\thandleObj = types.handleObj;\n\t\t\tjQuery( types.delegateTarget ).off(\n\t\t\t\thandleObj.namespace ?\n\t\t\t\t\thandleObj.origType + \".\" + handleObj.namespace :\n\t\t\t\t\thandleObj.origType,\n\t\t\t\thandleObj.selector,\n\t\t\t\thandleObj.handler\n\t\t\t);\n\t\t\treturn this;\n\t\t}\n\t\tif ( typeof types === \"object\" ) {\n\n\t\t\t// ( types-object [, selector] )\n\t\t\tfor ( type in types ) {\n\t\t\t\tthis.off( type, selector, types[ type ] );\n\t\t\t}\n\t\t\treturn this;\n\t\t}\n\t\tif ( selector === false || typeof selector === \"function\" ) {\n\n\t\t\t// ( types [, fn] )\n\t\t\tfn = selector;\n\t\t\tselector = undefined;\n\t\t}\n\t\tif ( fn === false ) {\n\t\t\tfn = returnFalse;\n\t\t}\n\t\treturn this.each( function() {\n\t\t\tjQuery.event.remove( this, types, fn, selector );\n\t\t} );\n\t}\n} );\n\n\nvar\n\n\t/* eslint-disable max-len */\n\n\t// See https://github.com/eslint/eslint/issues/3229\n\trxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\\/\\0>\\x20\\t\\r\\n\\f]*)[^>]*)\\/>/gi,\n\n\t/* eslint-enable */\n\n\t// Support: IE <=10 - 11, Edge 12 - 13 only\n\t// In IE/Edge using regex groups here causes severe slowdowns.\n\t// See https://connect.microsoft.com/IE/feedback/details/1736512/\n\trnoInnerhtml = /<script|<style|<link/i,\n\n\t// checked=\"checked\" or checked\n\trchecked = /checked\\s*(?:[^=]|=\\s*.checked.)/i,\n\trcleanScript = /^\\s*<!(?:\\[CDATA\\[|--)|(?:\\]\\]|--)>\\s*$/g;\n\n// Prefer a tbody over its parent table for containing new rows\nfunction manipulationTarget( elem, content ) {\n\tif ( nodeName( elem, \"table\" ) &&\n\t\tnodeName( content.nodeType !== 11 ? content : content.firstChild, \"tr\" ) ) {\n\n\t\treturn jQuery( elem ).children( \"tbody\" )[ 0 ] || elem;\n\t}\n\n\treturn elem;\n}\n\n// Replace/restore the type attribute of script elements for safe DOM manipulation\nfunction disableScript( elem ) {\n\telem.type = ( elem.getAttribute( \"type\" ) !== null ) + \"/\" + elem.type;\n\treturn elem;\n}\nfunction restoreScript( elem ) {\n\tif ( ( elem.type || \"\" ).slice( 0, 5 ) === \"true/\" ) {\n\t\telem.type = elem.type.slice( 5 );\n\t} else {\n\t\telem.removeAttribute( \"type\" );\n\t}\n\n\treturn elem;\n}\n\nfunction cloneCopyEvent( src, dest ) {\n\tvar i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;\n\n\tif ( dest.nodeType !== 1 ) {\n\t\treturn;\n\t}\n\n\t// 1. Copy private data: events, handlers, etc.\n\tif ( dataPriv.hasData( src ) ) {\n\t\tpdataOld = dataPriv.access( src );\n\t\tpdataCur = dataPriv.set( dest, pdataOld );\n\t\tevents = pdataOld.events;\n\n\t\tif ( events ) {\n\t\t\tdelete pdataCur.handle;\n\t\t\tpdataCur.events = {};\n\n\t\t\tfor ( type in events ) {\n\t\t\t\tfor ( i = 0, l = events[ type ].length; i < l; i++ ) {\n\t\t\t\t\tjQuery.event.add( dest, type, events[ type ][ i ] );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// 2. Copy user data\n\tif ( dataUser.hasData( src ) ) {\n\t\tudataOld = dataUser.access( src );\n\t\tudataCur = jQuery.extend( {}, udataOld );\n\n\t\tdataUser.set( dest, udataCur );\n\t}\n}\n\n// Fix IE bugs, see support tests\nfunction fixInput( src, dest ) {\n\tvar nodeName = dest.nodeName.toLowerCase();\n\n\t// Fails to persist the checked state of a cloned checkbox or radio button.\n\tif ( nodeName === \"input\" && rcheckableType.test( src.type ) ) {\n\t\tdest.checked = src.checked;\n\n\t// Fails to return the selected option to the default selected state when cloning options\n\t} else if ( nodeName === \"input\" || nodeName === \"textarea\" ) {\n\t\tdest.defaultValue = src.defaultValue;\n\t}\n}\n\nfunction domManip( collection, args, callback, ignored ) {\n\n\t// Flatten any nested arrays\n\targs = concat.apply( [], args );\n\n\tvar fragment, first, scripts, hasScripts, node, doc,\n\t\ti = 0,\n\t\tl = collection.length,\n\t\tiNoClone = l - 1,\n\t\tvalue = args[ 0 ],\n\t\tvalueIsFunction = isFunction( value );\n\n\t// We can't cloneNode fragments that contain checked, in WebKit\n\tif ( valueIsFunction ||\n\t\t\t( l > 1 && typeof value === \"string\" &&\n\t\t\t\t!support.checkClone && rchecked.test( value ) ) ) {\n\t\treturn collection.each( function( index ) {\n\t\t\tvar self = collection.eq( index );\n\t\t\tif ( valueIsFunction ) {\n\t\t\t\targs[ 0 ] = value.call( this, index, self.html() );\n\t\t\t}\n\t\t\tdomManip( self, args, callback, ignored );\n\t\t} );\n\t}\n\n\tif ( l ) {\n\t\tfragment = buildFragment( args, collection[ 0 ].ownerDocument, false, collection, ignored );\n\t\tfirst = fragment.firstChild;\n\n\t\tif ( fragment.childNodes.length === 1 ) {\n\t\t\tfragment = first;\n\t\t}\n\n\t\t// Require either new content or an interest in ignored elements to invoke the callback\n\t\tif ( first || ignored ) {\n\t\t\tscripts = jQuery.map( getAll( fragment, \"script\" ), disableScript );\n\t\t\thasScripts = scripts.length;\n\n\t\t\t// Use the original fragment for the last item\n\t\t\t// instead of the first because it can end up\n\t\t\t// being emptied incorrectly in certain situations (#8070).\n\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\tnode = fragment;\n\n\t\t\t\tif ( i !== iNoClone ) {\n\t\t\t\t\tnode = jQuery.clone( node, true, true );\n\n\t\t\t\t\t// Keep references to cloned scripts for later restoration\n\t\t\t\t\tif ( hasScripts ) {\n\n\t\t\t\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t\t\t\t// push.apply(_, arraylike) throws on ancient WebKit\n\t\t\t\t\t\tjQuery.merge( scripts, getAll( node, \"script\" ) );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tcallback.call( collection[ i ], node, i );\n\t\t\t}\n\n\t\t\tif ( hasScripts ) {\n\t\t\t\tdoc = scripts[ scripts.length - 1 ].ownerDocument;\n\n\t\t\t\t// Reenable scripts\n\t\t\t\tjQuery.map( scripts, restoreScript );\n\n\t\t\t\t// Evaluate executable scripts on first document insertion\n\t\t\t\tfor ( i = 0; i < hasScripts; i++ ) {\n\t\t\t\t\tnode = scripts[ i ];\n\t\t\t\t\tif ( rscriptType.test( node.type || \"\" ) &&\n\t\t\t\t\t\t!dataPriv.access( node, \"globalEval\" ) &&\n\t\t\t\t\t\tjQuery.contains( doc, node ) ) {\n\n\t\t\t\t\t\tif ( node.src && ( node.type || \"\" ).toLowerCase() !== \"module\" ) {\n\n\t\t\t\t\t\t\t// Optional AJAX dependency, but won't run scripts if not present\n\t\t\t\t\t\t\tif ( jQuery._evalUrl && !node.noModule ) {\n\t\t\t\t\t\t\t\tjQuery._evalUrl( node.src, {\n\t\t\t\t\t\t\t\t\tnonce: node.nonce || node.getAttribute( \"nonce\" )\n\t\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\tDOMEval( node.textContent.replace( rcleanScript, \"\" ), node, doc );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn collection;\n}\n\nfunction remove( elem, selector, keepData ) {\n\tvar node,\n\t\tnodes = selector ? jQuery.filter( selector, elem ) : elem,\n\t\ti = 0;\n\n\tfor ( ; ( node = nodes[ i ] ) != null; i++ ) {\n\t\tif ( !keepData && node.nodeType === 1 ) {\n\t\t\tjQuery.cleanData( getAll( node ) );\n\t\t}\n\n\t\tif ( node.parentNode ) {\n\t\t\tif ( keepData && isAttached( node ) ) {\n\t\t\t\tsetGlobalEval( getAll( node, \"script\" ) );\n\t\t\t}\n\t\t\tnode.parentNode.removeChild( node );\n\t\t}\n\t}\n\n\treturn elem;\n}\n\njQuery.extend( {\n\thtmlPrefilter: function( html ) {\n\t\treturn html.replace( rxhtmlTag, \"<$1></$2>\" );\n\t},\n\n\tclone: function( elem, dataAndEvents, deepDataAndEvents ) {\n\t\tvar i, l, srcElements, destElements,\n\t\t\tclone = elem.cloneNode( true ),\n\t\t\tinPage = isAttached( elem );\n\n\t\t// Fix IE cloning issues\n\t\tif ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&\n\t\t\t\t!jQuery.isXMLDoc( elem ) ) {\n\n\t\t\t// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2\n\t\t\tdestElements = getAll( clone );\n\t\t\tsrcElements = getAll( elem );\n\n\t\t\tfor ( i = 0, l = srcElements.length; i < l; i++ ) {\n\t\t\t\tfixInput( srcElements[ i ], destElements[ i ] );\n\t\t\t}\n\t\t}\n\n\t\t// Copy the events from the original to the clone\n\t\tif ( dataAndEvents ) {\n\t\t\tif ( deepDataAndEvents ) {\n\t\t\t\tsrcElements = srcElements || getAll( elem );\n\t\t\t\tdestElements = destElements || getAll( clone );\n\n\t\t\t\tfor ( i = 0, l = srcElements.length; i < l; i++ ) {\n\t\t\t\t\tcloneCopyEvent( srcElements[ i ], destElements[ i ] );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tcloneCopyEvent( elem, clone );\n\t\t\t}\n\t\t}\n\n\t\t// Preserve script evaluation history\n\t\tdestElements = getAll( clone, \"script\" );\n\t\tif ( destElements.length > 0 ) {\n\t\t\tsetGlobalEval( destElements, !inPage && getAll( elem, \"script\" ) );\n\t\t}\n\n\t\t// Return the cloned set\n\t\treturn clone;\n\t},\n\n\tcleanData: function( elems ) {\n\t\tvar data, elem, type,\n\t\t\tspecial = jQuery.event.special,\n\t\t\ti = 0;\n\n\t\tfor ( ; ( elem = elems[ i ] ) !== undefined; i++ ) {\n\t\t\tif ( acceptData( elem ) ) {\n\t\t\t\tif ( ( data = elem[ dataPriv.expando ] ) ) {\n\t\t\t\t\tif ( data.events ) {\n\t\t\t\t\t\tfor ( type in data.events ) {\n\t\t\t\t\t\t\tif ( special[ type ] ) {\n\t\t\t\t\t\t\t\tjQuery.event.remove( elem, type );\n\n\t\t\t\t\t\t\t// This is a shortcut to avoid jQuery.event.remove's overhead\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tjQuery.removeEvent( elem, type, data.handle );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Support: Chrome <=35 - 45+\n\t\t\t\t\t// Assign undefined instead of using delete, see Data#remove\n\t\t\t\t\telem[ dataPriv.expando ] = undefined;\n\t\t\t\t}\n\t\t\t\tif ( elem[ dataUser.expando ] ) {\n\n\t\t\t\t\t// Support: Chrome <=35 - 45+\n\t\t\t\t\t// Assign undefined instead of using delete, see Data#remove\n\t\t\t\t\telem[ dataUser.expando ] = undefined;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n} );\n\njQuery.fn.extend( {\n\tdetach: function( selector ) {\n\t\treturn remove( this, selector, true );\n\t},\n\n\tremove: function( selector ) {\n\t\treturn remove( this, selector );\n\t},\n\n\ttext: function( value ) {\n\t\treturn access( this, function( value ) {\n\t\t\treturn value === undefined ?\n\t\t\t\tjQuery.text( this ) :\n\t\t\t\tthis.empty().each( function() {\n\t\t\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\t\t\tthis.textContent = value;\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t}, null, value, arguments.length );\n\t},\n\n\tappend: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\tvar target = manipulationTarget( this, elem );\n\t\t\t\ttarget.appendChild( elem );\n\t\t\t}\n\t\t} );\n\t},\n\n\tprepend: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {\n\t\t\t\tvar target = manipulationTarget( this, elem );\n\t\t\t\ttarget.insertBefore( elem, target.firstChild );\n\t\t\t}\n\t\t} );\n\t},\n\n\tbefore: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.parentNode ) {\n\t\t\t\tthis.parentNode.insertBefore( elem, this );\n\t\t\t}\n\t\t} );\n\t},\n\n\tafter: function() {\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tif ( this.parentNode ) {\n\t\t\t\tthis.parentNode.insertBefore( elem, this.nextSibling );\n\t\t\t}\n\t\t} );\n\t},\n\n\tempty: function() {\n\t\tvar elem,\n\t\t\ti = 0;\n\n\t\tfor ( ; ( elem = this[ i ] ) != null; i++ ) {\n\t\t\tif ( elem.nodeType === 1 ) {\n\n\t\t\t\t// Prevent memory leaks\n\t\t\t\tjQuery.cleanData( getAll( elem, false ) );\n\n\t\t\t\t// Remove any remaining nodes\n\t\t\t\telem.textContent = \"\";\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\tclone: function( dataAndEvents, deepDataAndEvents ) {\n\t\tdataAndEvents = dataAndEvents == null ? false : dataAndEvents;\n\t\tdeepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;\n\n\t\treturn this.map( function() {\n\t\t\treturn jQuery.clone( this, dataAndEvents, deepDataAndEvents );\n\t\t} );\n\t},\n\n\thtml: function( value ) {\n\t\treturn access( this, function( value ) {\n\t\t\tvar elem = this[ 0 ] || {},\n\t\t\t\ti = 0,\n\t\t\t\tl = this.length;\n\n\t\t\tif ( value === undefined && elem.nodeType === 1 ) {\n\t\t\t\treturn elem.innerHTML;\n\t\t\t}\n\n\t\t\t// See if we can take a shortcut and just use innerHTML\n\t\t\tif ( typeof value === \"string\" && !rnoInnerhtml.test( value ) &&\n\t\t\t\t!wrapMap[ ( rtagName.exec( value ) || [ \"\", \"\" ] )[ 1 ].toLowerCase() ] ) {\n\n\t\t\t\tvalue = jQuery.htmlPrefilter( value );\n\n\t\t\t\ttry {\n\t\t\t\t\tfor ( ; i < l; i++ ) {\n\t\t\t\t\t\telem = this[ i ] || {};\n\n\t\t\t\t\t\t// Remove element nodes and prevent memory leaks\n\t\t\t\t\t\tif ( elem.nodeType === 1 ) {\n\t\t\t\t\t\t\tjQuery.cleanData( getAll( elem, false ) );\n\t\t\t\t\t\t\telem.innerHTML = value;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\telem = 0;\n\n\t\t\t\t// If using innerHTML throws an exception, use the fallback method\n\t\t\t\t} catch ( e ) {}\n\t\t\t}\n\n\t\t\tif ( elem ) {\n\t\t\t\tthis.empty().append( value );\n\t\t\t}\n\t\t}, null, value, arguments.length );\n\t},\n\n\treplaceWith: function() {\n\t\tvar ignored = [];\n\n\t\t// Make the changes, replacing each non-ignored context element with the new content\n\t\treturn domManip( this, arguments, function( elem ) {\n\t\t\tvar parent = this.parentNode;\n\n\t\t\tif ( jQuery.inArray( this, ignored ) < 0 ) {\n\t\t\t\tjQuery.cleanData( getAll( this ) );\n\t\t\t\tif ( parent ) {\n\t\t\t\t\tparent.replaceChild( elem, this );\n\t\t\t\t}\n\t\t\t}\n\n\t\t// Force callback invocation\n\t\t}, ignored );\n\t}\n} );\n\njQuery.each( {\n\tappendTo: \"append\",\n\tprependTo: \"prepend\",\n\tinsertBefore: \"before\",\n\tinsertAfter: \"after\",\n\treplaceAll: \"replaceWith\"\n}, function( name, original ) {\n\tjQuery.fn[ name ] = function( selector ) {\n\t\tvar elems,\n\t\t\tret = [],\n\t\t\tinsert = jQuery( selector ),\n\t\t\tlast = insert.length - 1,\n\t\t\ti = 0;\n\n\t\tfor ( ; i <= last; i++ ) {\n\t\t\telems = i === last ? this : this.clone( true );\n\t\t\tjQuery( insert[ i ] )[ original ]( elems );\n\n\t\t\t// Support: Android <=4.0 only, PhantomJS 1 only\n\t\t\t// .get() because push.apply(_, arraylike) throws on ancient WebKit\n\t\t\tpush.apply( ret, elems.get() );\n\t\t}\n\n\t\treturn this.pushStack( ret );\n\t};\n} );\nvar rnumnonpx = new RegExp( \"^(\" + pnum + \")(?!px)[a-z%]+$\", \"i\" );\n\nvar getStyles = function( elem ) {\n\n\t\t// Support: IE <=11 only, Firefox <=30 (#15098, #14150)\n\t\t// IE throws on elements created in popups\n\t\t// FF meanwhile throws on frame elements through \"defaultView.getComputedStyle\"\n\t\tvar view = elem.ownerDocument.defaultView;\n\n\t\tif ( !view || !view.opener ) {\n\t\t\tview = window;\n\t\t}\n\n\t\treturn view.getComputedStyle( elem );\n\t};\n\nvar rboxStyle = new RegExp( cssExpand.join( \"|\" ), \"i\" );\n\n\n\n( function() {\n\n\t// Executing both pixelPosition & boxSizingReliable tests require only one layout\n\t// so they're executed at the same time to save the second computation.\n\tfunction computeStyleTests() {\n\n\t\t// This is a singleton, we need to execute it only once\n\t\tif ( !div ) {\n\t\t\treturn;\n\t\t}\n\n\t\tcontainer.style.cssText = \"position:absolute;left:-11111px;width:60px;\" +\n\t\t\t\"margin-top:1px;padding:0;border:0\";\n\t\tdiv.style.cssText =\n\t\t\t\"position:relative;display:block;box-sizing:border-box;overflow:scroll;\" +\n\t\t\t\"margin:auto;border:1px;padding:1px;\" +\n\t\t\t\"width:60%;top:1%\";\n\t\tdocumentElement.appendChild( container ).appendChild( div );\n\n\t\tvar divStyle = window.getComputedStyle( div );\n\t\tpixelPositionVal = divStyle.top !== \"1%\";\n\n\t\t// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44\n\t\treliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;\n\n\t\t// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3\n\t\t// Some styles come back with percentage values, even though they shouldn't\n\t\tdiv.style.right = \"60%\";\n\t\tpixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;\n\n\t\t// Support: IE 9 - 11 only\n\t\t// Detect misreporting of content dimensions for box-sizing:border-box elements\n\t\tboxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;\n\n\t\t// Support: IE 9 only\n\t\t// Detect overflow:scroll screwiness (gh-3699)\n\t\t// Support: Chrome <=64\n\t\t// Don't get tricked when zoom affects offsetWidth (gh-4029)\n\t\tdiv.style.position = \"absolute\";\n\t\tscrollboxSizeVal = roundPixelMeasures( div.offsetWidth / 3 ) === 12;\n\n\t\tdocumentElement.removeChild( container );\n\n\t\t// Nullify the div so it wouldn't be stored in the memory and\n\t\t// it will also be a sign that checks already performed\n\t\tdiv = null;\n\t}\n\n\tfunction roundPixelMeasures( measure ) {\n\t\treturn Math.round( parseFloat( measure ) );\n\t}\n\n\tvar pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,\n\t\treliableMarginLeftVal,\n\t\tcontainer = document.createElement( \"div\" ),\n\t\tdiv = document.createElement( \"div\" );\n\n\t// Finish early in limited (non-browser) environments\n\tif ( !div.style ) {\n\t\treturn;\n\t}\n\n\t// Support: IE <=9 - 11 only\n\t// Style of cloned element affects source element cloned (#8908)\n\tdiv.style.backgroundClip = \"content-box\";\n\tdiv.cloneNode( true ).style.backgroundClip = \"\";\n\tsupport.clearCloneStyle = div.style.backgroundClip === \"content-box\";\n\n\tjQuery.extend( support, {\n\t\tboxSizingReliable: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn boxSizingReliableVal;\n\t\t},\n\t\tpixelBoxStyles: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn pixelBoxStylesVal;\n\t\t},\n\t\tpixelPosition: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn pixelPositionVal;\n\t\t},\n\t\treliableMarginLeft: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn reliableMarginLeftVal;\n\t\t},\n\t\tscrollboxSize: function() {\n\t\t\tcomputeStyleTests();\n\t\t\treturn scrollboxSizeVal;\n\t\t}\n\t} );\n} )();\n\n\nfunction curCSS( elem, name, computed ) {\n\tvar width, minWidth, maxWidth, ret,\n\n\t\t// Support: Firefox 51+\n\t\t// Retrieving style before computed somehow\n\t\t// fixes an issue with getting wrong values\n\t\t// on detached elements\n\t\tstyle = elem.style;\n\n\tcomputed = computed || getStyles( elem );\n\n\t// getPropertyValue is needed for:\n\t// .css('filter') (IE 9 only, #12537)\n\t// .css('--customProperty) (#3144)\n\tif ( computed ) {\n\t\tret = computed.getPropertyValue( name ) || computed[ name ];\n\n\t\tif ( ret === \"\" && !isAttached( elem ) ) {\n\t\t\tret = jQuery.style( elem, name );\n\t\t}\n\n\t\t// A tribute to the \"awesome hack by Dean Edwards\"\n\t\t// Android Browser returns percentage for some values,\n\t\t// but width seems to be reliably pixels.\n\t\t// This is against the CSSOM draft spec:\n\t\t// https://drafts.csswg.org/cssom/#resolved-values\n\t\tif ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.test( name ) ) {\n\n\t\t\t// Remember the original values\n\t\t\twidth = style.width;\n\t\t\tminWidth = style.minWidth;\n\t\t\tmaxWidth = style.maxWidth;\n\n\t\t\t// Put in the new values to get a computed value out\n\t\t\tstyle.minWidth = style.maxWidth = style.width = ret;\n\t\t\tret = computed.width;\n\n\t\t\t// Revert the changed values\n\t\t\tstyle.width = width;\n\t\t\tstyle.minWidth = minWidth;\n\t\t\tstyle.maxWidth = maxWidth;\n\t\t}\n\t}\n\n\treturn ret !== undefined ?\n\n\t\t// Support: IE <=9 - 11 only\n\t\t// IE returns zIndex value as an integer.\n\t\tret + \"\" :\n\t\tret;\n}\n\n\nfunction addGetHookIf( conditionFn, hookFn ) {\n\n\t// Define the hook, we'll check on the first run if it's really needed.\n\treturn {\n\t\tget: function() {\n\t\t\tif ( conditionFn() ) {\n\n\t\t\t\t// Hook not needed (or it's not possible to use it due\n\t\t\t\t// to missing dependency), remove it.\n\t\t\t\tdelete this.get;\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Hook needed; redefine it so that the support test is not executed again.\n\t\t\treturn ( this.get = hookFn ).apply( this, arguments );\n\t\t}\n\t};\n}\n\n\nvar cssPrefixes = [ \"Webkit\", \"Moz\", \"ms\" ],\n\temptyStyle = document.createElement( \"div\" ).style,\n\tvendorProps = {};\n\n// Return a vendor-prefixed property or undefined\nfunction vendorPropName( name ) {\n\n\t// Check for vendor prefixed names\n\tvar capName = name[ 0 ].toUpperCase() + name.slice( 1 ),\n\t\ti = cssPrefixes.length;\n\n\twhile ( i-- ) {\n\t\tname = cssPrefixes[ i ] + capName;\n\t\tif ( name in emptyStyle ) {\n\t\t\treturn name;\n\t\t}\n\t}\n}\n\n// Return a potentially-mapped jQuery.cssProps or vendor prefixed property\nfunction finalPropName( name ) {\n\tvar final = jQuery.cssProps[ name ] || vendorProps[ name ];\n\n\tif ( final ) {\n\t\treturn final;\n\t}\n\tif ( name in emptyStyle ) {\n\t\treturn name;\n\t}\n\treturn vendorProps[ name ] = vendorPropName( name ) || name;\n}\n\n\nvar\n\n\t// Swappable if display is none or starts with table\n\t// except \"table\", \"table-cell\", or \"table-caption\"\n\t// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display\n\trdisplayswap = /^(none|table(?!-c[ea]).+)/,\n\trcustomProp = /^--/,\n\tcssShow = { position: \"absolute\", visibility: \"hidden\", display: \"block\" },\n\tcssNormalTransform = {\n\t\tletterSpacing: \"0\",\n\t\tfontWeight: \"400\"\n\t};\n\nfunction setPositiveNumber( elem, value, subtract ) {\n\n\t// Any relative (+/-) values have already been\n\t// normalized at this point\n\tvar matches = rcssNum.exec( value );\n\treturn matches ?\n\n\t\t// Guard against undefined \"subtract\", e.g., when used as in cssHooks\n\t\tMath.max( 0, matches[ 2 ] - ( subtract || 0 ) ) + ( matches[ 3 ] || \"px\" ) :\n\t\tvalue;\n}\n\nfunction boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computedVal ) {\n\tvar i = dimension === \"width\" ? 1 : 0,\n\t\textra = 0,\n\t\tdelta = 0;\n\n\t// Adjustment may not be necessary\n\tif ( box === ( isBorderBox ? \"border\" : \"content\" ) ) {\n\t\treturn 0;\n\t}\n\n\tfor ( ; i < 4; i += 2 ) {\n\n\t\t// Both box models exclude margin\n\t\tif ( box === \"margin\" ) {\n\t\t\tdelta += jQuery.css( elem, box + cssExpand[ i ], true, styles );\n\t\t}\n\n\t\t// If we get here with a content-box, we're seeking \"padding\" or \"border\" or \"margin\"\n\t\tif ( !isBorderBox ) {\n\n\t\t\t// Add padding\n\t\t\tdelta += jQuery.css( elem, \"padding\" + cssExpand[ i ], true, styles );\n\n\t\t\t// For \"border\" or \"margin\", add border\n\t\t\tif ( box !== \"padding\" ) {\n\t\t\t\tdelta += jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\n\t\t\t// But still keep track of it otherwise\n\t\t\t} else {\n\t\t\t\textra += jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\t\t\t}\n\n\t\t// If we get here with a border-box (content + padding + border), we're seeking \"content\" or\n\t\t// \"padding\" or \"margin\"\n\t\t} else {\n\n\t\t\t// For \"content\", subtract padding\n\t\t\tif ( box === \"content\" ) {\n\t\t\t\tdelta -= jQuery.css( elem, \"padding\" + cssExpand[ i ], true, styles );\n\t\t\t}\n\n\t\t\t// For \"content\" or \"padding\", subtract border\n\t\t\tif ( box !== \"margin\" ) {\n\t\t\t\tdelta -= jQuery.css( elem, \"border\" + cssExpand[ i ] + \"Width\", true, styles );\n\t\t\t}\n\t\t}\n\t}\n\n\t// Account for positive content-box scroll gutter when requested by providing computedVal\n\tif ( !isBorderBox && computedVal >= 0 ) {\n\n\t\t// offsetWidth/offsetHeight is a rounded sum of content, padding, scroll gutter, and border\n\t\t// Assuming integer scroll gutter, subtract the rest and round down\n\t\tdelta += Math.max( 0, Math.ceil(\n\t\t\telem[ \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -\n\t\t\tcomputedVal -\n\t\t\tdelta -\n\t\t\textra -\n\t\t\t0.5\n\n\t\t// If offsetWidth/offsetHeight is unknown, then we can't determine content-box scroll gutter\n\t\t// Use an explicit zero to avoid NaN (gh-3964)\n\t\t) ) || 0;\n\t}\n\n\treturn delta;\n}\n\nfunction getWidthOrHeight( elem, dimension, extra ) {\n\n\t// Start with computed style\n\tvar styles = getStyles( elem ),\n\n\t\t// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-4322).\n\t\t// Fake content-box until we know it's needed to know the true value.\n\t\tboxSizingNeeded = !support.boxSizingReliable() || extra,\n\t\tisBorderBox = boxSizingNeeded &&\n\t\t\tjQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\",\n\t\tvalueIsBorderBox = isBorderBox,\n\n\t\tval = curCSS( elem, dimension, styles ),\n\t\toffsetProp = \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );\n\n\t// Support: Firefox <=54\n\t// Return a confounding non-pixel value or feign ignorance, as appropriate.\n\tif ( rnumnonpx.test( val ) ) {\n\t\tif ( !extra ) {\n\t\t\treturn val;\n\t\t}\n\t\tval = \"auto\";\n\t}\n\n\n\t// Fall back to offsetWidth/offsetHeight when value is \"auto\"\n\t// This happens for inline elements with no explicit setting (gh-3571)\n\t// Support: Android <=4.1 - 4.3 only\n\t// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)\n\t// Support: IE 9-11 only\n\t// Also use offsetWidth/offsetHeight for when box sizing is unreliable\n\t// We use getClientRects() to check for hidden/disconnected.\n\t// In those cases, the computed value can be trusted to be border-box\n\tif ( ( !support.boxSizingReliable() && isBorderBox ||\n\t\tval === \"auto\" ||\n\t\t!parseFloat( val ) && jQuery.css( elem, \"display\", false, styles ) === \"inline\" ) &&\n\t\telem.getClientRects().length ) {\n\n\t\tisBorderBox = jQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\";\n\n\t\t// Where available, offsetWidth/offsetHeight approximate border box dimensions.\n\t\t// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the\n\t\t// retrieved value as a content box dimension.\n\t\tvalueIsBorderBox = offsetProp in elem;\n\t\tif ( valueIsBorderBox ) {\n\t\t\tval = elem[ offsetProp ];\n\t\t}\n\t}\n\n\t// Normalize \"\" and auto\n\tval = parseFloat( val ) || 0;\n\n\t// Adjust for the element's box model\n\treturn ( val +\n\t\tboxModelAdjustment(\n\t\t\telem,\n\t\t\tdimension,\n\t\t\textra || ( isBorderBox ? \"border\" : \"content\" ),\n\t\t\tvalueIsBorderBox,\n\t\t\tstyles,\n\n\t\t\t// Provide the current computed size to request scroll gutter calculation (gh-3589)\n\t\t\tval\n\t\t)\n\t) + \"px\";\n}\n\njQuery.extend( {\n\n\t// Add in style property hooks for overriding the default\n\t// behavior of getting and setting a style property\n\tcssHooks: {\n\t\topacity: {\n\t\t\tget: function( elem, computed ) {\n\t\t\t\tif ( computed ) {\n\n\t\t\t\t\t// We should always get a number back from opacity\n\t\t\t\t\tvar ret = curCSS( elem, \"opacity\" );\n\t\t\t\t\treturn ret === \"\" ? \"1\" : ret;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t},\n\n\t// Don't automatically add \"px\" to these possibly-unitless properties\n\tcssNumber: {\n\t\t\"animationIterationCount\": true,\n\t\t\"columnCount\": true,\n\t\t\"fillOpacity\": true,\n\t\t\"flexGrow\": true,\n\t\t\"flexShrink\": true,\n\t\t\"fontWeight\": true,\n\t\t\"gridArea\": true,\n\t\t\"gridColumn\": true,\n\t\t\"gridColumnEnd\": true,\n\t\t\"gridColumnStart\": true,\n\t\t\"gridRow\": true,\n\t\t\"gridRowEnd\": true,\n\t\t\"gridRowStart\": true,\n\t\t\"lineHeight\": true,\n\t\t\"opacity\": true,\n\t\t\"order\": true,\n\t\t\"orphans\": true,\n\t\t\"widows\": true,\n\t\t\"zIndex\": true,\n\t\t\"zoom\": true\n\t},\n\n\t// Add in properties whose names you wish to fix before\n\t// setting or getting the value\n\tcssProps: {},\n\n\t// Get and set the style property on a DOM Node\n\tstyle: function( elem, name, value, extra ) {\n\n\t\t// Don't set styles on text and comment nodes\n\t\tif ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Make sure that we're working with the right name\n\t\tvar ret, type, hooks,\n\t\t\torigName = camelCase( name ),\n\t\t\tisCustomProp = rcustomProp.test( name ),\n\t\t\tstyle = elem.style;\n\n\t\t// Make sure that we're working with the right name. We don't\n\t\t// want to query the value if it is a CSS custom property\n\t\t// since they are user-defined.\n\t\tif ( !isCustomProp ) {\n\t\t\tname = finalPropName( origName );\n\t\t}\n\n\t\t// Gets hook for the prefixed version, then unprefixed version\n\t\thooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];\n\n\t\t// Check if we're setting a value\n\t\tif ( value !== undefined ) {\n\t\t\ttype = typeof value;\n\n\t\t\t// Convert \"+=\" or \"-=\" to relative numbers (#7345)\n\t\t\tif ( type === \"string\" && ( ret = rcssNum.exec( value ) ) && ret[ 1 ] ) {\n\t\t\t\tvalue = adjustCSS( elem, name, ret );\n\n\t\t\t\t// Fixes bug #9237\n\t\t\t\ttype = \"number\";\n\t\t\t}\n\n\t\t\t// Make sure that null and NaN values aren't set (#7116)\n\t\t\tif ( value == null || value !== value ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// If a number was passed in, add the unit (except for certain CSS properties)\n\t\t\t// The isCustomProp check can be removed in jQuery 4.0 when we only auto-append\n\t\t\t// \"px\" to a few hardcoded values.\n\t\t\tif ( type === \"number\" && !isCustomProp ) {\n\t\t\t\tvalue += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? \"\" : \"px\" );\n\t\t\t}\n\n\t\t\t// background-* props affect original clone's values\n\t\t\tif ( !support.clearCloneStyle && value === \"\" && name.indexOf( \"background\" ) === 0 ) {\n\t\t\t\tstyle[ name ] = \"inherit\";\n\t\t\t}\n\n\t\t\t// If a hook was provided, use that value, otherwise just set the specified value\n\t\t\tif ( !hooks || !( \"set\" in hooks ) ||\n\t\t\t\t( value = hooks.set( elem, value, extra ) ) !== undefined ) {\n\n\t\t\t\tif ( isCustomProp ) {\n\t\t\t\t\tstyle.setProperty( name, value );\n\t\t\t\t} else {\n\t\t\t\t\tstyle[ name ] = value;\n\t\t\t\t}\n\t\t\t}\n\n\t\t} else {\n\n\t\t\t// If a hook was provided get the non-computed value from there\n\t\t\tif ( hooks && \"get\" in hooks &&\n\t\t\t\t( ret = hooks.get( elem, false, extra ) ) !== undefined ) {\n\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\t// Otherwise just get the value from the style object\n\t\t\treturn style[ name ];\n\t\t}\n\t},\n\n\tcss: function( elem, name, extra, styles ) {\n\t\tvar val, num, hooks,\n\t\t\torigName = camelCase( name ),\n\t\t\tisCustomProp = rcustomProp.test( name );\n\n\t\t// Make sure that we're working with the right name. We don't\n\t\t// want to modify the value if it is a CSS custom property\n\t\t// since they are user-defined.\n\t\tif ( !isCustomProp ) {\n\t\t\tname = finalPropName( origName );\n\t\t}\n\n\t\t// Try prefixed name followed by the unprefixed name\n\t\thooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];\n\n\t\t// If a hook was provided get the computed value from there\n\t\tif ( hooks && \"get\" in hooks ) {\n\t\t\tval = hooks.get( elem, true, extra );\n\t\t}\n\n\t\t// Otherwise, if a way to get the computed value exists, use that\n\t\tif ( val === undefined ) {\n\t\t\tval = curCSS( elem, name, styles );\n\t\t}\n\n\t\t// Convert \"normal\" to computed value\n\t\tif ( val === \"normal\" && name in cssNormalTransform ) {\n\t\t\tval = cssNormalTransform[ name ];\n\t\t}\n\n\t\t// Make numeric if forced or a qualifier was provided and val looks numeric\n\t\tif ( extra === \"\" || extra ) {\n\t\t\tnum = parseFloat( val );\n\t\t\treturn extra === true || isFinite( num ) ? num || 0 : val;\n\t\t}\n\n\t\treturn val;\n\t}\n} );\n\njQuery.each( [ \"height\", \"width\" ], function( i, dimension ) {\n\tjQuery.cssHooks[ dimension ] = {\n\t\tget: function( elem, computed, extra ) {\n\t\t\tif ( computed ) {\n\n\t\t\t\t// Certain elements can have dimension info if we invisibly show them\n\t\t\t\t// but it must have a current display style that would benefit\n\t\t\t\treturn rdisplayswap.test( jQuery.css( elem, \"display\" ) ) &&\n\n\t\t\t\t\t// Support: Safari 8+\n\t\t\t\t\t// Table columns in Safari have non-zero offsetWidth & zero\n\t\t\t\t\t// getBoundingClientRect().width unless display is changed.\n\t\t\t\t\t// Support: IE <=11 only\n\t\t\t\t\t// Running getBoundingClientRect on a disconnected node\n\t\t\t\t\t// in IE throws an error.\n\t\t\t\t\t( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?\n\t\t\t\t\t\tswap( elem, cssShow, function() {\n\t\t\t\t\t\t\treturn getWidthOrHeight( elem, dimension, extra );\n\t\t\t\t\t\t} ) :\n\t\t\t\t\t\tgetWidthOrHeight( elem, dimension, extra );\n\t\t\t}\n\t\t},\n\n\t\tset: function( elem, value, extra ) {\n\t\t\tvar matches,\n\t\t\t\tstyles = getStyles( elem ),\n\n\t\t\t\t// Only read styles.position if the test has a chance to fail\n\t\t\t\t// to avoid forcing a reflow.\n\t\t\t\tscrollboxSizeBuggy = !support.scrollboxSize() &&\n\t\t\t\t\tstyles.position === \"absolute\",\n\n\t\t\t\t// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991)\n\t\t\t\tboxSizingNeeded = scrollboxSizeBuggy || extra,\n\t\t\t\tisBorderBox = boxSizingNeeded &&\n\t\t\t\t\tjQuery.css( elem, \"boxSizing\", false, styles ) === \"border-box\",\n\t\t\t\tsubtract = extra ?\n\t\t\t\t\tboxModelAdjustment(\n\t\t\t\t\t\telem,\n\t\t\t\t\t\tdimension,\n\t\t\t\t\t\textra,\n\t\t\t\t\t\tisBorderBox,\n\t\t\t\t\t\tstyles\n\t\t\t\t\t) :\n\t\t\t\t\t0;\n\n\t\t\t// Account for unreliable border-box dimensions by comparing offset* to computed and\n\t\t\t// faking a content-box to get border and padding (gh-3699)\n\t\t\tif ( isBorderBox && scrollboxSizeBuggy ) {\n\t\t\t\tsubtract -= Math.ceil(\n\t\t\t\t\telem[ \"offset\" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -\n\t\t\t\t\tparseFloat( styles[ dimension ] ) -\n\t\t\t\t\tboxModelAdjustment( elem, dimension, \"border\", false, styles ) -\n\t\t\t\t\t0.5\n\t\t\t\t);\n\t\t\t}\n\n\t\t\t// Convert to pixels if value adjustment is needed\n\t\t\tif ( subtract && ( matches = rcssNum.exec( value ) ) &&\n\t\t\t\t( matches[ 3 ] || \"px\" ) !== \"px\" ) {\n\n\t\t\t\telem.style[ dimension ] = value;\n\t\t\t\tvalue = jQuery.css( elem, dimension );\n\t\t\t}\n\n\t\t\treturn setPositiveNumber( elem, value, subtract );\n\t\t}\n\t};\n} );\n\njQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,\n\tfunction( elem, computed ) {\n\t\tif ( computed ) {\n\t\t\treturn ( parseFloat( curCSS( elem, \"marginLeft\" ) ) ||\n\t\t\t\telem.getBoundingClientRect().left -\n\t\t\t\t\tswap( elem, { marginLeft: 0 }, function() {\n\t\t\t\t\t\treturn elem.getBoundingClientRect().left;\n\t\t\t\t\t} )\n\t\t\t\t) + \"px\";\n\t\t}\n\t}\n);\n\n// These hooks are used by animate to expand properties\njQuery.each( {\n\tmargin: \"\",\n\tpadding: \"\",\n\tborder: \"Width\"\n}, function( prefix, suffix ) {\n\tjQuery.cssHooks[ prefix + suffix ] = {\n\t\texpand: function( value ) {\n\t\t\tvar i = 0,\n\t\t\t\texpanded = {},\n\n\t\t\t\t// Assumes a single number if not a string\n\t\t\t\tparts = typeof value === \"string\" ? value.split( \" \" ) : [ value ];\n\n\t\t\tfor ( ; i < 4; i++ ) {\n\t\t\t\texpanded[ prefix + cssExpand[ i ] + suffix ] =\n\t\t\t\t\tparts[ i ] || parts[ i - 2 ] || parts[ 0 ];\n\t\t\t}\n\n\t\t\treturn expanded;\n\t\t}\n\t};\n\n\tif ( prefix !== \"margin\" ) {\n\t\tjQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;\n\t}\n} );\n\njQuery.fn.extend( {\n\tcss: function( name, value ) {\n\t\treturn access( this, function( elem, name, value ) {\n\t\t\tvar styles, len,\n\t\t\t\tmap = {},\n\t\t\t\ti = 0;\n\n\t\t\tif ( Array.isArray( name ) ) {\n\t\t\t\tstyles = getStyles( elem );\n\t\t\t\tlen = name.length;\n\n\t\t\t\tfor ( ; i < len; i++ ) {\n\t\t\t\t\tmap[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );\n\t\t\t\t}\n\n\t\t\t\treturn map;\n\t\t\t}\n\n\t\t\treturn value !== undefined ?\n\t\t\t\tjQuery.style( elem, name, value ) :\n\t\t\t\tjQuery.css( elem, name );\n\t\t}, name, value, arguments.length > 1 );\n\t}\n} );\n\n\nfunction Tween( elem, options, prop, end, easing ) {\n\treturn new Tween.prototype.init( elem, options, prop, end, easing );\n}\njQuery.Tween = Tween;\n\nTween.prototype = {\n\tconstructor: Tween,\n\tinit: function( elem, options, prop, end, easing, unit ) {\n\t\tthis.elem = elem;\n\t\tthis.prop = prop;\n\t\tthis.easing = easing || jQuery.easing._default;\n\t\tthis.options = options;\n\t\tthis.start = this.now = this.cur();\n\t\tthis.end = end;\n\t\tthis.unit = unit || ( jQuery.cssNumber[ prop ] ? \"\" : \"px\" );\n\t},\n\tcur: function() {\n\t\tvar hooks = Tween.propHooks[ this.prop ];\n\n\t\treturn hooks && hooks.get ?\n\t\t\thooks.get( this ) :\n\t\t\tTween.propHooks._default.get( this );\n\t},\n\trun: function( percent ) {\n\t\tvar eased,\n\t\t\thooks = Tween.propHooks[ this.prop ];\n\n\t\tif ( this.options.duration ) {\n\t\t\tthis.pos = eased = jQuery.easing[ this.easing ](\n\t\t\t\tpercent, this.options.duration * percent, 0, 1, this.options.duration\n\t\t\t);\n\t\t} else {\n\t\t\tthis.pos = eased = percent;\n\t\t}\n\t\tthis.now = ( this.end - this.start ) * eased + this.start;\n\n\t\tif ( this.options.step ) {\n\t\t\tthis.options.step.call( this.elem, this.now, this );\n\t\t}\n\n\t\tif ( hooks && hooks.set ) {\n\t\t\thooks.set( this );\n\t\t} else {\n\t\t\tTween.propHooks._default.set( this );\n\t\t}\n\t\treturn this;\n\t}\n};\n\nTween.prototype.init.prototype = Tween.prototype;\n\nTween.propHooks = {\n\t_default: {\n\t\tget: function( tween ) {\n\t\t\tvar result;\n\n\t\t\t// Use a property on the element directly when it is not a DOM element,\n\t\t\t// or when there is no matching style property that exists.\n\t\t\tif ( tween.elem.nodeType !== 1 ||\n\t\t\t\ttween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {\n\t\t\t\treturn tween.elem[ tween.prop ];\n\t\t\t}\n\n\t\t\t// Passing an empty string as a 3rd parameter to .css will automatically\n\t\t\t// attempt a parseFloat and fallback to a string if the parse fails.\n\t\t\t// Simple values such as \"10px\" are parsed to Float;\n\t\t\t// complex values such as \"rotate(1rad)\" are returned as-is.\n\t\t\tresult = jQuery.css( tween.elem, tween.prop, \"\" );\n\n\t\t\t// Empty strings, null, undefined and \"auto\" are converted to 0.\n\t\t\treturn !result || result === \"auto\" ? 0 : result;\n\t\t},\n\t\tset: function( tween ) {\n\n\t\t\t// Use step hook for back compat.\n\t\t\t// Use cssHook if its there.\n\t\t\t// Use .style if available and use plain properties where available.\n\t\t\tif ( jQuery.fx.step[ tween.prop ] ) {\n\t\t\t\tjQuery.fx.step[ tween.prop ]( tween );\n\t\t\t} else if ( tween.elem.nodeType === 1 && (\n\t\t\t\t\tjQuery.cssHooks[ tween.prop ] ||\n\t\t\t\t\ttween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {\n\t\t\t\tjQuery.style( tween.elem, tween.prop, tween.now + tween.unit );\n\t\t\t} else {\n\t\t\t\ttween.elem[ tween.prop ] = tween.now;\n\t\t\t}\n\t\t}\n\t}\n};\n\n// Support: IE <=9 only\n// Panic based approach to setting things on disconnected nodes\nTween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {\n\tset: function( tween ) {\n\t\tif ( tween.elem.nodeType && tween.elem.parentNode ) {\n\t\t\ttween.elem[ tween.prop ] = tween.now;\n\t\t}\n\t}\n};\n\njQuery.easing = {\n\tlinear: function( p ) {\n\t\treturn p;\n\t},\n\tswing: function( p ) {\n\t\treturn 0.5 - Math.cos( p * Math.PI ) / 2;\n\t},\n\t_default: \"swing\"\n};\n\njQuery.fx = Tween.prototype.init;\n\n// Back compat <1.8 extension point\njQuery.fx.step = {};\n\n\n\n\nvar\n\tfxNow, inProgress,\n\trfxtypes = /^(?:toggle|show|hide)$/,\n\trrun = /queueHooks$/;\n\nfunction schedule() {\n\tif ( inProgress ) {\n\t\tif ( document.hidden === false && window.requestAnimationFrame ) {\n\t\t\twindow.requestAnimationFrame( schedule );\n\t\t} else {\n\t\t\twindow.setTimeout( schedule, jQuery.fx.interval );\n\t\t}\n\n\t\tjQuery.fx.tick();\n\t}\n}\n\n// Animations created synchronously will run synchronously\nfunction createFxNow() {\n\twindow.setTimeout( function() {\n\t\tfxNow = undefined;\n\t} );\n\treturn ( fxNow = Date.now() );\n}\n\n// Generate parameters to create a standard animation\nfunction genFx( type, includeWidth ) {\n\tvar which,\n\t\ti = 0,\n\t\tattrs = { height: type };\n\n\t// If we include width, step value is 1 to do all cssExpand values,\n\t// otherwise step value is 2 to skip over Left and Right\n\tincludeWidth = includeWidth ? 1 : 0;\n\tfor ( ; i < 4; i += 2 - includeWidth ) {\n\t\twhich = cssExpand[ i ];\n\t\tattrs[ \"margin\" + which ] = attrs[ \"padding\" + which ] = type;\n\t}\n\n\tif ( includeWidth ) {\n\t\tattrs.opacity = attrs.width = type;\n\t}\n\n\treturn attrs;\n}\n\nfunction createTween( value, prop, animation ) {\n\tvar tween,\n\t\tcollection = ( Animation.tweeners[ prop ] || [] ).concat( Animation.tweeners[ \"*\" ] ),\n\t\tindex = 0,\n\t\tlength = collection.length;\n\tfor ( ; index < length; index++ ) {\n\t\tif ( ( tween = collection[ index ].call( animation, prop, value ) ) ) {\n\n\t\t\t// We're done with this property\n\t\t\treturn tween;\n\t\t}\n\t}\n}\n\nfunction defaultPrefilter( elem, props, opts ) {\n\tvar prop, value, toggle, hooks, oldfire, propTween, restoreDisplay, display,\n\t\tisBox = \"width\" in props || \"height\" in props,\n\t\tanim = this,\n\t\torig = {},\n\t\tstyle = elem.style,\n\t\thidden = elem.nodeType && isHiddenWithinTree( elem ),\n\t\tdataShow = dataPriv.get( elem, \"fxshow\" );\n\n\t// Queue-skipping animations hijack the fx hooks\n\tif ( !opts.queue ) {\n\t\thooks = jQuery._queueHooks( elem, \"fx\" );\n\t\tif ( hooks.unqueued == null ) {\n\t\t\thooks.unqueued = 0;\n\t\t\toldfire = hooks.empty.fire;\n\t\t\thooks.empty.fire = function() {\n\t\t\t\tif ( !hooks.unqueued ) {\n\t\t\t\t\toldfire();\n\t\t\t\t}\n\t\t\t};\n\t\t}\n\t\thooks.unqueued++;\n\n\t\tanim.always( function() {\n\n\t\t\t// Ensure the complete handler is called before this completes\n\t\t\tanim.always( function() {\n\t\t\t\thooks.unqueued--;\n\t\t\t\tif ( !jQuery.queue( elem, \"fx\" ).length ) {\n\t\t\t\t\thooks.empty.fire();\n\t\t\t\t}\n\t\t\t} );\n\t\t} );\n\t}\n\n\t// Detect show/hide animations\n\tfor ( prop in props ) {\n\t\tvalue = props[ prop ];\n\t\tif ( rfxtypes.test( value ) ) {\n\t\t\tdelete props[ prop ];\n\t\t\ttoggle = toggle || value === \"toggle\";\n\t\t\tif ( value === ( hidden ? \"hide\" : \"show\" ) ) {\n\n\t\t\t\t// Pretend to be hidden if this is a \"show\" and\n\t\t\t\t// there is still data from a stopped show/hide\n\t\t\t\tif ( value === \"show\" && dataShow && dataShow[ prop ] !== undefined ) {\n\t\t\t\t\thidden = true;\n\n\t\t\t\t// Ignore all other no-op show/hide data\n\t\t\t\t} else {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\t\t\t}\n\t\t\torig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );\n\t\t}\n\t}\n\n\t// Bail out if this is a no-op like .hide().hide()\n\tpropTween = !jQuery.isEmptyObject( props );\n\tif ( !propTween && jQuery.isEmptyObject( orig ) ) {\n\t\treturn;\n\t}\n\n\t// Restrict \"overflow\" and \"display\" styles during box animations\n\tif ( isBox && elem.nodeType === 1 ) {\n\n\t\t// Support: IE <=9 - 11, Edge 12 - 15\n\t\t// Record all 3 overflow attributes because IE does not infer the shorthand\n\t\t// from identically-valued overflowX and overflowY and Edge just mirrors\n\t\t// the overflowX value there.\n\t\topts.overflow = [ style.overflow, style.overflowX, style.overflowY ];\n\n\t\t// Identify a display type, preferring old show/hide data over the CSS cascade\n\t\trestoreDisplay = dataShow && dataShow.display;\n\t\tif ( restoreDisplay == null ) {\n\t\t\trestoreDisplay = dataPriv.get( elem, \"display\" );\n\t\t}\n\t\tdisplay = jQuery.css( elem, \"display\" );\n\t\tif ( display === \"none\" ) {\n\t\t\tif ( restoreDisplay ) {\n\t\t\t\tdisplay = restoreDisplay;\n\t\t\t} else {\n\n\t\t\t\t// Get nonempty value(s) by temporarily forcing visibility\n\t\t\t\tshowHide( [ elem ], true );\n\t\t\t\trestoreDisplay = elem.style.display || restoreDisplay;\n\t\t\t\tdisplay = jQuery.css( elem, \"display\" );\n\t\t\t\tshowHide( [ elem ] );\n\t\t\t}\n\t\t}\n\n\t\t// Animate inline elements as inline-block\n\t\tif ( display === \"inline\" || display === \"inline-block\" && restoreDisplay != null ) {\n\t\t\tif ( jQuery.css( elem, \"float\" ) === \"none\" ) {\n\n\t\t\t\t// Restore the original display value at the end of pure show/hide animations\n\t\t\t\tif ( !propTween ) {\n\t\t\t\t\tanim.done( function() {\n\t\t\t\t\t\tstyle.display = restoreDisplay;\n\t\t\t\t\t} );\n\t\t\t\t\tif ( restoreDisplay == null ) {\n\t\t\t\t\t\tdisplay = style.display;\n\t\t\t\t\t\trestoreDisplay = display === \"none\" ? \"\" : display;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tstyle.display = \"inline-block\";\n\t\t\t}\n\t\t}\n\t}\n\n\tif ( opts.overflow ) {\n\t\tstyle.overflow = \"hidden\";\n\t\tanim.always( function() {\n\t\t\tstyle.overflow = opts.overflow[ 0 ];\n\t\t\tstyle.overflowX = opts.overflow[ 1 ];\n\t\t\tstyle.overflowY = opts.overflow[ 2 ];\n\t\t} );\n\t}\n\n\t// Implement show/hide animations\n\tpropTween = false;\n\tfor ( prop in orig ) {\n\n\t\t// General show/hide setup for this element animation\n\t\tif ( !propTween ) {\n\t\t\tif ( dataShow ) {\n\t\t\t\tif ( \"hidden\" in dataShow ) {\n\t\t\t\t\thidden = dataShow.hidden;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tdataShow = dataPriv.access( elem, \"fxshow\", { display: restoreDisplay } );\n\t\t\t}\n\n\t\t\t// Store hidden/visible for toggle so `.stop().toggle()` \"reverses\"\n\t\t\tif ( toggle ) {\n\t\t\t\tdataShow.hidden = !hidden;\n\t\t\t}\n\n\t\t\t// Show elements before animating them\n\t\t\tif ( hidden ) {\n\t\t\t\tshowHide( [ elem ], true );\n\t\t\t}\n\n\t\t\t/* eslint-disable no-loop-func */\n\n\t\t\tanim.done( function() {\n\n\t\t\t/* eslint-enable no-loop-func */\n\n\t\t\t\t// The final step of a \"hide\" animation is actually hiding the element\n\t\t\t\tif ( !hidden ) {\n\t\t\t\t\tshowHide( [ elem ] );\n\t\t\t\t}\n\t\t\t\tdataPriv.remove( elem, \"fxshow\" );\n\t\t\t\tfor ( prop in orig ) {\n\t\t\t\t\tjQuery.style( elem, prop, orig[ prop ] );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\n\t\t// Per-property setup\n\t\tpropTween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );\n\t\tif ( !( prop in dataShow ) ) {\n\t\t\tdataShow[ prop ] = propTween.start;\n\t\t\tif ( hidden ) {\n\t\t\t\tpropTween.end = propTween.start;\n\t\t\t\tpropTween.start = 0;\n\t\t\t}\n\t\t}\n\t}\n}\n\nfunction propFilter( props, specialEasing ) {\n\tvar index, name, easing, value, hooks;\n\n\t// camelCase, specialEasing and expand cssHook pass\n\tfor ( index in props ) {\n\t\tname = camelCase( index );\n\t\teasing = specialEasing[ name ];\n\t\tvalue = props[ index ];\n\t\tif ( Array.isArray( value ) ) {\n\t\t\teasing = value[ 1 ];\n\t\t\tvalue = props[ index ] = value[ 0 ];\n\t\t}\n\n\t\tif ( index !== name ) {\n\t\t\tprops[ name ] = value;\n\t\t\tdelete props[ index ];\n\t\t}\n\n\t\thooks = jQuery.cssHooks[ name ];\n\t\tif ( hooks && \"expand\" in hooks ) {\n\t\t\tvalue = hooks.expand( value );\n\t\t\tdelete props[ name ];\n\n\t\t\t// Not quite $.extend, this won't overwrite existing keys.\n\t\t\t// Reusing 'index' because we have the correct \"name\"\n\t\t\tfor ( index in value ) {\n\t\t\t\tif ( !( index in props ) ) {\n\t\t\t\t\tprops[ index ] = value[ index ];\n\t\t\t\t\tspecialEasing[ index ] = easing;\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tspecialEasing[ name ] = easing;\n\t\t}\n\t}\n}\n\nfunction Animation( elem, properties, options ) {\n\tvar result,\n\t\tstopped,\n\t\tindex = 0,\n\t\tlength = Animation.prefilters.length,\n\t\tdeferred = jQuery.Deferred().always( function() {\n\n\t\t\t// Don't match elem in the :animated selector\n\t\t\tdelete tick.elem;\n\t\t} ),\n\t\ttick = function() {\n\t\t\tif ( stopped ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t\tvar currentTime = fxNow || createFxNow(),\n\t\t\t\tremaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),\n\n\t\t\t\t// Support: Android 2.3 only\n\t\t\t\t// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)\n\t\t\t\ttemp = remaining / animation.duration || 0,\n\t\t\t\tpercent = 1 - temp,\n\t\t\t\tindex = 0,\n\t\t\t\tlength = animation.tweens.length;\n\n\t\t\tfor ( ; index < length; index++ ) {\n\t\t\t\tanimation.tweens[ index ].run( percent );\n\t\t\t}\n\n\t\t\tdeferred.notifyWith( elem, [ animation, percent, remaining ] );\n\n\t\t\t// If there's more to do, yield\n\t\t\tif ( percent < 1 && length ) {\n\t\t\t\treturn remaining;\n\t\t\t}\n\n\t\t\t// If this was an empty animation, synthesize a final progress notification\n\t\t\tif ( !length ) {\n\t\t\t\tdeferred.notifyWith( elem, [ animation, 1, 0 ] );\n\t\t\t}\n\n\t\t\t// Resolve the animation and report its conclusion\n\t\t\tdeferred.resolveWith( elem, [ animation ] );\n\t\t\treturn false;\n\t\t},\n\t\tanimation = deferred.promise( {\n\t\t\telem: elem,\n\t\t\tprops: jQuery.extend( {}, properties ),\n\t\t\topts: jQuery.extend( true, {\n\t\t\t\tspecialEasing: {},\n\t\t\t\teasing: jQuery.easing._default\n\t\t\t}, options ),\n\t\t\toriginalProperties: properties,\n\t\t\toriginalOptions: options,\n\t\t\tstartTime: fxNow || createFxNow(),\n\t\t\tduration: options.duration,\n\t\t\ttweens: [],\n\t\t\tcreateTween: function( prop, end ) {\n\t\t\t\tvar tween = jQuery.Tween( elem, animation.opts, prop, end,\n\t\t\t\t\t\tanimation.opts.specialEasing[ prop ] || animation.opts.easing );\n\t\t\t\tanimation.tweens.push( tween );\n\t\t\t\treturn tween;\n\t\t\t},\n\t\t\tstop: function( gotoEnd ) {\n\t\t\t\tvar index = 0,\n\n\t\t\t\t\t// If we are going to the end, we want to run all the tweens\n\t\t\t\t\t// otherwise we skip this part\n\t\t\t\t\tlength = gotoEnd ? animation.tweens.length : 0;\n\t\t\t\tif ( stopped ) {\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\t\t\t\tstopped = true;\n\t\t\t\tfor ( ; index < length; index++ ) {\n\t\t\t\t\tanimation.tweens[ index ].run( 1 );\n\t\t\t\t}\n\n\t\t\t\t// Resolve when we played the last frame; otherwise, reject\n\t\t\t\tif ( gotoEnd ) {\n\t\t\t\t\tdeferred.notifyWith( elem, [ animation, 1, 0 ] );\n\t\t\t\t\tdeferred.resolveWith( elem, [ animation, gotoEnd ] );\n\t\t\t\t} else {\n\t\t\t\t\tdeferred.rejectWith( elem, [ animation, gotoEnd ] );\n\t\t\t\t}\n\t\t\t\treturn this;\n\t\t\t}\n\t\t} ),\n\t\tprops = animation.props;\n\n\tpropFilter( props, animation.opts.specialEasing );\n\n\tfor ( ; index < length; index++ ) {\n\t\tresult = Animation.prefilters[ index ].call( animation, elem, props, animation.opts );\n\t\tif ( result ) {\n\t\t\tif ( isFunction( result.stop ) ) {\n\t\t\t\tjQuery._queueHooks( animation.elem, animation.opts.queue ).stop =\n\t\t\t\t\tresult.stop.bind( result );\n\t\t\t}\n\t\t\treturn result;\n\t\t}\n\t}\n\n\tjQuery.map( props, createTween, animation );\n\n\tif ( isFunction( animation.opts.start ) ) {\n\t\tanimation.opts.start.call( elem, animation );\n\t}\n\n\t// Attach callbacks from options\n\tanimation\n\t\t.progress( animation.opts.progress )\n\t\t.done( animation.opts.done, animation.opts.complete )\n\t\t.fail( animation.opts.fail )\n\t\t.always( animation.opts.always );\n\n\tjQuery.fx.timer(\n\t\tjQuery.extend( tick, {\n\t\t\telem: elem,\n\t\t\tanim: animation,\n\t\t\tqueue: animation.opts.queue\n\t\t} )\n\t);\n\n\treturn animation;\n}\n\njQuery.Animation = jQuery.extend( Animation, {\n\n\ttweeners: {\n\t\t\"*\": [ function( prop, value ) {\n\t\t\tvar tween = this.createTween( prop, value );\n\t\t\tadjustCSS( tween.elem, prop, rcssNum.exec( value ), tween );\n\t\t\treturn tween;\n\t\t} ]\n\t},\n\n\ttweener: function( props, callback ) {\n\t\tif ( isFunction( props ) ) {\n\t\t\tcallback = props;\n\t\t\tprops = [ \"*\" ];\n\t\t} else {\n\t\t\tprops = props.match( rnothtmlwhite );\n\t\t}\n\n\t\tvar prop,\n\t\t\tindex = 0,\n\t\t\tlength = props.length;\n\n\t\tfor ( ; index < length; index++ ) {\n\t\t\tprop = props[ index ];\n\t\t\tAnimation.tweeners[ prop ] = Animation.tweeners[ prop ] || [];\n\t\t\tAnimation.tweeners[ prop ].unshift( callback );\n\t\t}\n\t},\n\n\tprefilters: [ defaultPrefilter ],\n\n\tprefilter: function( callback, prepend ) {\n\t\tif ( prepend ) {\n\t\t\tAnimation.prefilters.unshift( callback );\n\t\t} else {\n\t\t\tAnimation.prefilters.push( callback );\n\t\t}\n\t}\n} );\n\njQuery.speed = function( speed, easing, fn ) {\n\tvar opt = speed && typeof speed === \"object\" ? jQuery.extend( {}, speed ) : {\n\t\tcomplete: fn || !fn && easing ||\n\t\t\tisFunction( speed ) && speed,\n\t\tduration: speed,\n\t\teasing: fn && easing || easing && !isFunction( easing ) && easing\n\t};\n\n\t// Go to the end state if fx are off\n\tif ( jQuery.fx.off ) {\n\t\topt.duration = 0;\n\n\t} else {\n\t\tif ( typeof opt.duration !== \"number\" ) {\n\t\t\tif ( opt.duration in jQuery.fx.speeds ) {\n\t\t\t\topt.duration = jQuery.fx.speeds[ opt.duration ];\n\n\t\t\t} else {\n\t\t\t\topt.duration = jQuery.fx.speeds._default;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Normalize opt.queue - true/undefined/null -> \"fx\"\n\tif ( opt.queue == null || opt.queue === true ) {\n\t\topt.queue = \"fx\";\n\t}\n\n\t// Queueing\n\topt.old = opt.complete;\n\n\topt.complete = function() {\n\t\tif ( isFunction( opt.old ) ) {\n\t\t\topt.old.call( this );\n\t\t}\n\n\t\tif ( opt.queue ) {\n\t\t\tjQuery.dequeue( this, opt.queue );\n\t\t}\n\t};\n\n\treturn opt;\n};\n\njQuery.fn.extend( {\n\tfadeTo: function( speed, to, easing, callback ) {\n\n\t\t// Show any hidden elements after setting opacity to 0\n\t\treturn this.filter( isHiddenWithinTree ).css( \"opacity\", 0 ).show()\n\n\t\t\t// Animate to the value specified\n\t\t\t.end().animate( { opacity: to }, speed, easing, callback );\n\t},\n\tanimate: function( prop, speed, easing, callback ) {\n\t\tvar empty = jQuery.isEmptyObject( prop ),\n\t\t\toptall = jQuery.speed( speed, easing, callback ),\n\t\t\tdoAnimation = function() {\n\n\t\t\t\t// Operate on a copy of prop so per-property easing won't be lost\n\t\t\t\tvar anim = Animation( this, jQuery.extend( {}, prop ), optall );\n\n\t\t\t\t// Empty animations, or finishing resolves immediately\n\t\t\t\tif ( empty || dataPriv.get( this, \"finish\" ) ) {\n\t\t\t\t\tanim.stop( true );\n\t\t\t\t}\n\t\t\t};\n\t\t\tdoAnimation.finish = doAnimation;\n\n\t\treturn empty || optall.queue === false ?\n\t\t\tthis.each( doAnimation ) :\n\t\t\tthis.queue( optall.queue, doAnimation );\n\t},\n\tstop: function( type, clearQueue, gotoEnd ) {\n\t\tvar stopQueue = function( hooks ) {\n\t\t\tvar stop = hooks.stop;\n\t\t\tdelete hooks.stop;\n\t\t\tstop( gotoEnd );\n\t\t};\n\n\t\tif ( typeof type !== \"string\" ) {\n\t\t\tgotoEnd = clearQueue;\n\t\t\tclearQueue = type;\n\t\t\ttype = undefined;\n\t\t}\n\t\tif ( clearQueue && type !== false ) {\n\t\t\tthis.queue( type || \"fx\", [] );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar dequeue = true,\n\t\t\t\tindex = type != null && type + \"queueHooks\",\n\t\t\t\ttimers = jQuery.timers,\n\t\t\t\tdata = dataPriv.get( this );\n\n\t\t\tif ( index ) {\n\t\t\t\tif ( data[ index ] && data[ index ].stop ) {\n\t\t\t\t\tstopQueue( data[ index ] );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tfor ( index in data ) {\n\t\t\t\t\tif ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {\n\t\t\t\t\t\tstopQueue( data[ index ] );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfor ( index = timers.length; index--; ) {\n\t\t\t\tif ( timers[ index ].elem === this &&\n\t\t\t\t\t( type == null || timers[ index ].queue === type ) ) {\n\n\t\t\t\t\ttimers[ index ].anim.stop( gotoEnd );\n\t\t\t\t\tdequeue = false;\n\t\t\t\t\ttimers.splice( index, 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Start the next in the queue if the last step wasn't forced.\n\t\t\t// Timers currently will call their complete callbacks, which\n\t\t\t// will dequeue but only if they were gotoEnd.\n\t\t\tif ( dequeue || !gotoEnd ) {\n\t\t\t\tjQuery.dequeue( this, type );\n\t\t\t}\n\t\t} );\n\t},\n\tfinish: function( type ) {\n\t\tif ( type !== false ) {\n\t\t\ttype = type || \"fx\";\n\t\t}\n\t\treturn this.each( function() {\n\t\t\tvar index,\n\t\t\t\tdata = dataPriv.get( this ),\n\t\t\t\tqueue = data[ type + \"queue\" ],\n\t\t\t\thooks = data[ type + \"queueHooks\" ],\n\t\t\t\ttimers = jQuery.timers,\n\t\t\t\tlength = queue ? queue.length : 0;\n\n\t\t\t// Enable finishing flag on private data\n\t\t\tdata.finish = true;\n\n\t\t\t// Empty the queue first\n\t\t\tjQuery.queue( this, type, [] );\n\n\t\t\tif ( hooks && hooks.stop ) {\n\t\t\t\thooks.stop.call( this, true );\n\t\t\t}\n\n\t\t\t// Look for any active animations, and finish them\n\t\t\tfor ( index = timers.length; index--; ) {\n\t\t\t\tif ( timers[ index ].elem === this && timers[ index ].queue === type ) {\n\t\t\t\t\ttimers[ index ].anim.stop( true );\n\t\t\t\t\ttimers.splice( index, 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Look for any animations in the old queue and finish them\n\t\t\tfor ( index = 0; index < length; index++ ) {\n\t\t\t\tif ( queue[ index ] && queue[ index ].finish ) {\n\t\t\t\t\tqueue[ index ].finish.call( this );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Turn off finishing flag\n\t\t\tdelete data.finish;\n\t\t} );\n\t}\n} );\n\njQuery.each( [ \"toggle\", \"show\", \"hide\" ], function( i, name ) {\n\tvar cssFn = jQuery.fn[ name ];\n\tjQuery.fn[ name ] = function( speed, easing, callback ) {\n\t\treturn speed == null || typeof speed === \"boolean\" ?\n\t\t\tcssFn.apply( this, arguments ) :\n\t\t\tthis.animate( genFx( name, true ), speed, easing, callback );\n\t};\n} );\n\n// Generate shortcuts for custom animations\njQuery.each( {\n\tslideDown: genFx( \"show\" ),\n\tslideUp: genFx( \"hide\" ),\n\tslideToggle: genFx( \"toggle\" ),\n\tfadeIn: { opacity: \"show\" },\n\tfadeOut: { opacity: \"hide\" },\n\tfadeToggle: { opacity: \"toggle\" }\n}, function( name, props ) {\n\tjQuery.fn[ name ] = function( speed, easing, callback ) {\n\t\treturn this.animate( props, speed, easing, callback );\n\t};\n} );\n\njQuery.timers = [];\njQuery.fx.tick = function() {\n\tvar timer,\n\t\ti = 0,\n\t\ttimers = jQuery.timers;\n\n\tfxNow = Date.now();\n\n\tfor ( ; i < timers.length; i++ ) {\n\t\ttimer = timers[ i ];\n\n\t\t// Run the timer and safely remove it when done (allowing for external removal)\n\t\tif ( !timer() && timers[ i ] === timer ) {\n\t\t\ttimers.splice( i--, 1 );\n\t\t}\n\t}\n\n\tif ( !timers.length ) {\n\t\tjQuery.fx.stop();\n\t}\n\tfxNow = undefined;\n};\n\njQuery.fx.timer = function( timer ) {\n\tjQuery.timers.push( timer );\n\tjQuery.fx.start();\n};\n\njQuery.fx.interval = 13;\njQuery.fx.start = function() {\n\tif ( inProgress ) {\n\t\treturn;\n\t}\n\n\tinProgress = true;\n\tschedule();\n};\n\njQuery.fx.stop = function() {\n\tinProgress = null;\n};\n\njQuery.fx.speeds = {\n\tslow: 600,\n\tfast: 200,\n\n\t// Default speed\n\t_default: 400\n};\n\n\n// Based off of the plugin by Clint Helfers, with permission.\n// https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/\njQuery.fn.delay = function( time, type ) {\n\ttime = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;\n\ttype = type || \"fx\";\n\n\treturn this.queue( type, function( next, hooks ) {\n\t\tvar timeout = window.setTimeout( next, time );\n\t\thooks.stop = function() {\n\t\t\twindow.clearTimeout( timeout );\n\t\t};\n\t} );\n};\n\n\n( function() {\n\tvar input = document.createElement( \"input\" ),\n\t\tselect = document.createElement( \"select\" ),\n\t\topt = select.appendChild( document.createElement( \"option\" ) );\n\n\tinput.type = \"checkbox\";\n\n\t// Support: Android <=4.3 only\n\t// Default value for a checkbox should be \"on\"\n\tsupport.checkOn = input.value !== \"\";\n\n\t// Support: IE <=11 only\n\t// Must access selectedIndex to make default options select\n\tsupport.optSelected = opt.selected;\n\n\t// Support: IE <=11 only\n\t// An input loses its value after becoming a radio\n\tinput = document.createElement( \"input\" );\n\tinput.value = \"t\";\n\tinput.type = \"radio\";\n\tsupport.radioValue = input.value === \"t\";\n} )();\n\n\nvar boolHook,\n\tattrHandle = jQuery.expr.attrHandle;\n\njQuery.fn.extend( {\n\tattr: function( name, value ) {\n\t\treturn access( this, jQuery.attr, name, value, arguments.length > 1 );\n\t},\n\n\tremoveAttr: function( name ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.removeAttr( this, name );\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tattr: function( elem, name, value ) {\n\t\tvar ret, hooks,\n\t\t\tnType = elem.nodeType;\n\n\t\t// Don't get/set attributes on text, comment and attribute nodes\n\t\tif ( nType === 3 || nType === 8 || nType === 2 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Fallback to prop when attributes are not supported\n\t\tif ( typeof elem.getAttribute === \"undefined\" ) {\n\t\t\treturn jQuery.prop( elem, name, value );\n\t\t}\n\n\t\t// Attribute hooks are determined by the lowercase version\n\t\t// Grab necessary hook if one is defined\n\t\tif ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {\n\t\t\thooks = jQuery.attrHooks[ name.toLowerCase() ] ||\n\t\t\t\t( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );\n\t\t}\n\n\t\tif ( value !== undefined ) {\n\t\t\tif ( value === null ) {\n\t\t\t\tjQuery.removeAttr( elem, name );\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( hooks && \"set\" in hooks &&\n\t\t\t\t( ret = hooks.set( elem, value, name ) ) !== undefined ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\telem.setAttribute( name, value + \"\" );\n\t\t\treturn value;\n\t\t}\n\n\t\tif ( hooks && \"get\" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {\n\t\t\treturn ret;\n\t\t}\n\n\t\tret = jQuery.find.attr( elem, name );\n\n\t\t// Non-existent attributes return null, we normalize to undefined\n\t\treturn ret == null ? undefined : ret;\n\t},\n\n\tattrHooks: {\n\t\ttype: {\n\t\t\tset: function( elem, value ) {\n\t\t\t\tif ( !support.radioValue && value === \"radio\" &&\n\t\t\t\t\tnodeName( elem, \"input\" ) ) {\n\t\t\t\t\tvar val = elem.value;\n\t\t\t\t\telem.setAttribute( \"type\", value );\n\t\t\t\t\tif ( val ) {\n\t\t\t\t\t\telem.value = val;\n\t\t\t\t\t}\n\t\t\t\t\treturn value;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t},\n\n\tremoveAttr: function( elem, value ) {\n\t\tvar name,\n\t\t\ti = 0,\n\n\t\t\t// Attribute names can contain non-HTML whitespace characters\n\t\t\t// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2\n\t\t\tattrNames = value && value.match( rnothtmlwhite );\n\n\t\tif ( attrNames && elem.nodeType === 1 ) {\n\t\t\twhile ( ( name = attrNames[ i++ ] ) ) {\n\t\t\t\telem.removeAttribute( name );\n\t\t\t}\n\t\t}\n\t}\n} );\n\n// Hooks for boolean attributes\nboolHook = {\n\tset: function( elem, value, name ) {\n\t\tif ( value === false ) {\n\n\t\t\t// Remove boolean attributes when set to false\n\t\t\tjQuery.removeAttr( elem, name );\n\t\t} else {\n\t\t\telem.setAttribute( name, name );\n\t\t}\n\t\treturn name;\n\t}\n};\n\njQuery.each( jQuery.expr.match.bool.source.match( /\\w+/g ), function( i, name ) {\n\tvar getter = attrHandle[ name ] || jQuery.find.attr;\n\n\tattrHandle[ name ] = function( elem, name, isXML ) {\n\t\tvar ret, handle,\n\t\t\tlowercaseName = name.toLowerCase();\n\n\t\tif ( !isXML ) {\n\n\t\t\t// Avoid an infinite loop by temporarily removing this function from the getter\n\t\t\thandle = attrHandle[ lowercaseName ];\n\t\t\tattrHandle[ lowercaseName ] = ret;\n\t\t\tret = getter( elem, name, isXML ) != null ?\n\t\t\t\tlowercaseName :\n\t\t\t\tnull;\n\t\t\tattrHandle[ lowercaseName ] = handle;\n\t\t}\n\t\treturn ret;\n\t};\n} );\n\n\n\n\nvar rfocusable = /^(?:input|select|textarea|button)$/i,\n\trclickable = /^(?:a|area)$/i;\n\njQuery.fn.extend( {\n\tprop: function( name, value ) {\n\t\treturn access( this, jQuery.prop, name, value, arguments.length > 1 );\n\t},\n\n\tremoveProp: function( name ) {\n\t\treturn this.each( function() {\n\t\t\tdelete this[ jQuery.propFix[ name ] || name ];\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tprop: function( elem, name, value ) {\n\t\tvar ret, hooks,\n\t\t\tnType = elem.nodeType;\n\n\t\t// Don't get/set properties on text, comment and attribute nodes\n\t\tif ( nType === 3 || nType === 8 || nType === 2 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {\n\n\t\t\t// Fix name and attach hooks\n\t\t\tname = jQuery.propFix[ name ] || name;\n\t\t\thooks = jQuery.propHooks[ name ];\n\t\t}\n\n\t\tif ( value !== undefined ) {\n\t\t\tif ( hooks && \"set\" in hooks &&\n\t\t\t\t( ret = hooks.set( elem, value, name ) ) !== undefined ) {\n\t\t\t\treturn ret;\n\t\t\t}\n\n\t\t\treturn ( elem[ name ] = value );\n\t\t}\n\n\t\tif ( hooks && \"get\" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {\n\t\t\treturn ret;\n\t\t}\n\n\t\treturn elem[ name ];\n\t},\n\n\tpropHooks: {\n\t\ttabIndex: {\n\t\t\tget: function( elem ) {\n\n\t\t\t\t// Support: IE <=9 - 11 only\n\t\t\t\t// elem.tabIndex doesn't always return the\n\t\t\t\t// correct value when it hasn't been explicitly set\n\t\t\t\t// https://web.archive.org/web/20141116233347/http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/\n\t\t\t\t// Use proper attribute retrieval(#12072)\n\t\t\t\tvar tabindex = jQuery.find.attr( elem, \"tabindex\" );\n\n\t\t\t\tif ( tabindex ) {\n\t\t\t\t\treturn parseInt( tabindex, 10 );\n\t\t\t\t}\n\n\t\t\t\tif (\n\t\t\t\t\trfocusable.test( elem.nodeName ) ||\n\t\t\t\t\trclickable.test( elem.nodeName ) &&\n\t\t\t\t\telem.href\n\t\t\t\t) {\n\t\t\t\t\treturn 0;\n\t\t\t\t}\n\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}\n\t},\n\n\tpropFix: {\n\t\t\"for\": \"htmlFor\",\n\t\t\"class\": \"className\"\n\t}\n} );\n\n// Support: IE <=11 only\n// Accessing the selectedIndex property\n// forces the browser to respect setting selected\n// on the option\n// The getter ensures a default option is selected\n// when in an optgroup\n// eslint rule \"no-unused-expressions\" is disabled for this code\n// since it considers such accessions noop\nif ( !support.optSelected ) {\n\tjQuery.propHooks.selected = {\n\t\tget: function( elem ) {\n\n\t\t\t/* eslint no-unused-expressions: \"off\" */\n\n\t\t\tvar parent = elem.parentNode;\n\t\t\tif ( parent && parent.parentNode ) {\n\t\t\t\tparent.parentNode.selectedIndex;\n\t\t\t}\n\t\t\treturn null;\n\t\t},\n\t\tset: function( elem ) {\n\n\t\t\t/* eslint no-unused-expressions: \"off\" */\n\n\t\t\tvar parent = elem.parentNode;\n\t\t\tif ( parent ) {\n\t\t\t\tparent.selectedIndex;\n\n\t\t\t\tif ( parent.parentNode ) {\n\t\t\t\t\tparent.parentNode.selectedIndex;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\njQuery.each( [\n\t\"tabIndex\",\n\t\"readOnly\",\n\t\"maxLength\",\n\t\"cellSpacing\",\n\t\"cellPadding\",\n\t\"rowSpan\",\n\t\"colSpan\",\n\t\"useMap\",\n\t\"frameBorder\",\n\t\"contentEditable\"\n], function() {\n\tjQuery.propFix[ this.toLowerCase() ] = this;\n} );\n\n\n\n\n\t// Strip and collapse whitespace according to HTML spec\n\t// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace\n\tfunction stripAndCollapse( value ) {\n\t\tvar tokens = value.match( rnothtmlwhite ) || [];\n\t\treturn tokens.join( \" \" );\n\t}\n\n\nfunction getClass( elem ) {\n\treturn elem.getAttribute && elem.getAttribute( \"class\" ) || \"\";\n}\n\nfunction classesToArray( value ) {\n\tif ( Array.isArray( value ) ) {\n\t\treturn value;\n\t}\n\tif ( typeof value === \"string\" ) {\n\t\treturn value.match( rnothtmlwhite ) || [];\n\t}\n\treturn [];\n}\n\njQuery.fn.extend( {\n\taddClass: function( value ) {\n\t\tvar classes, elem, cur, curValue, clazz, j, finalValue,\n\t\t\ti = 0;\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( j ) {\n\t\t\t\tjQuery( this ).addClass( value.call( this, j, getClass( this ) ) );\n\t\t\t} );\n\t\t}\n\n\t\tclasses = classesToArray( value );\n\n\t\tif ( classes.length ) {\n\t\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\t\tcurValue = getClass( elem );\n\t\t\t\tcur = elem.nodeType === 1 && ( \" \" + stripAndCollapse( curValue ) + \" \" );\n\n\t\t\t\tif ( cur ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\twhile ( ( clazz = classes[ j++ ] ) ) {\n\t\t\t\t\t\tif ( cur.indexOf( \" \" + clazz + \" \" ) < 0 ) {\n\t\t\t\t\t\t\tcur += clazz + \" \";\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Only assign if different to avoid unneeded rendering.\n\t\t\t\t\tfinalValue = stripAndCollapse( cur );\n\t\t\t\t\tif ( curValue !== finalValue ) {\n\t\t\t\t\t\telem.setAttribute( \"class\", finalValue );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\tremoveClass: function( value ) {\n\t\tvar classes, elem, cur, curValue, clazz, j, finalValue,\n\t\t\ti = 0;\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( j ) {\n\t\t\t\tjQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );\n\t\t\t} );\n\t\t}\n\n\t\tif ( !arguments.length ) {\n\t\t\treturn this.attr( \"class\", \"\" );\n\t\t}\n\n\t\tclasses = classesToArray( value );\n\n\t\tif ( classes.length ) {\n\t\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\t\tcurValue = getClass( elem );\n\n\t\t\t\t// This expression is here for better compressibility (see addClass)\n\t\t\t\tcur = elem.nodeType === 1 && ( \" \" + stripAndCollapse( curValue ) + \" \" );\n\n\t\t\t\tif ( cur ) {\n\t\t\t\t\tj = 0;\n\t\t\t\t\twhile ( ( clazz = classes[ j++ ] ) ) {\n\n\t\t\t\t\t\t// Remove *all* instances\n\t\t\t\t\t\twhile ( cur.indexOf( \" \" + clazz + \" \" ) > -1 ) {\n\t\t\t\t\t\t\tcur = cur.replace( \" \" + clazz + \" \", \" \" );\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\n\t\t\t\t\t// Only assign if different to avoid unneeded rendering.\n\t\t\t\t\tfinalValue = stripAndCollapse( cur );\n\t\t\t\t\tif ( curValue !== finalValue ) {\n\t\t\t\t\t\telem.setAttribute( \"class\", finalValue );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn this;\n\t},\n\n\ttoggleClass: function( value, stateVal ) {\n\t\tvar type = typeof value,\n\t\t\tisValidValue = type === \"string\" || Array.isArray( value );\n\n\t\tif ( typeof stateVal === \"boolean\" && isValidValue ) {\n\t\t\treturn stateVal ? this.addClass( value ) : this.removeClass( value );\n\t\t}\n\n\t\tif ( isFunction( value ) ) {\n\t\t\treturn this.each( function( i ) {\n\t\t\t\tjQuery( this ).toggleClass(\n\t\t\t\t\tvalue.call( this, i, getClass( this ), stateVal ),\n\t\t\t\t\tstateVal\n\t\t\t\t);\n\t\t\t} );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar className, i, self, classNames;\n\n\t\t\tif ( isValidValue ) {\n\n\t\t\t\t// Toggle individual class names\n\t\t\t\ti = 0;\n\t\t\t\tself = jQuery( this );\n\t\t\t\tclassNames = classesToArray( value );\n\n\t\t\t\twhile ( ( className = classNames[ i++ ] ) ) {\n\n\t\t\t\t\t// Check each className given, space separated list\n\t\t\t\t\tif ( self.hasClass( className ) ) {\n\t\t\t\t\t\tself.removeClass( className );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tself.addClass( className );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t// Toggle whole class name\n\t\t\t} else if ( value === undefined || type === \"boolean\" ) {\n\t\t\t\tclassName = getClass( this );\n\t\t\t\tif ( className ) {\n\n\t\t\t\t\t// Store className if set\n\t\t\t\t\tdataPriv.set( this, \"__className__\", className );\n\t\t\t\t}\n\n\t\t\t\t// If the element has a class name or if we're passed `false`,\n\t\t\t\t// then remove the whole classname (if there was one, the above saved it).\n\t\t\t\t// Otherwise bring back whatever was previously saved (if anything),\n\t\t\t\t// falling back to the empty string if nothing was stored.\n\t\t\t\tif ( this.setAttribute ) {\n\t\t\t\t\tthis.setAttribute( \"class\",\n\t\t\t\t\t\tclassName || value === false ?\n\t\t\t\t\t\t\"\" :\n\t\t\t\t\t\tdataPriv.get( this, \"__className__\" ) || \"\"\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\t},\n\n\thasClass: function( selector ) {\n\t\tvar className, elem,\n\t\t\ti = 0;\n\n\t\tclassName = \" \" + selector + \" \";\n\t\twhile ( ( elem = this[ i++ ] ) ) {\n\t\t\tif ( elem.nodeType === 1 &&\n\t\t\t\t( \" \" + stripAndCollapse( getClass( elem ) ) + \" \" ).indexOf( className ) > -1 ) {\n\t\t\t\t\treturn true;\n\t\t\t}\n\t\t}\n\n\t\treturn false;\n\t}\n} );\n\n\n\n\nvar rreturn = /\\r/g;\n\njQuery.fn.extend( {\n\tval: function( value ) {\n\t\tvar hooks, ret, valueIsFunction,\n\t\t\telem = this[ 0 ];\n\n\t\tif ( !arguments.length ) {\n\t\t\tif ( elem ) {\n\t\t\t\thooks = jQuery.valHooks[ elem.type ] ||\n\t\t\t\t\tjQuery.valHooks[ elem.nodeName.toLowerCase() ];\n\n\t\t\t\tif ( hooks &&\n\t\t\t\t\t\"get\" in hooks &&\n\t\t\t\t\t( ret = hooks.get( elem, \"value\" ) ) !== undefined\n\t\t\t\t) {\n\t\t\t\t\treturn ret;\n\t\t\t\t}\n\n\t\t\t\tret = elem.value;\n\n\t\t\t\t// Handle most common string cases\n\t\t\t\tif ( typeof ret === \"string\" ) {\n\t\t\t\t\treturn ret.replace( rreturn, \"\" );\n\t\t\t\t}\n\n\t\t\t\t// Handle cases where value is null/undef or number\n\t\t\t\treturn ret == null ? \"\" : ret;\n\t\t\t}\n\n\t\t\treturn;\n\t\t}\n\n\t\tvalueIsFunction = isFunction( value );\n\n\t\treturn this.each( function( i ) {\n\t\t\tvar val;\n\n\t\t\tif ( this.nodeType !== 1 ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( valueIsFunction ) {\n\t\t\t\tval = value.call( this, i, jQuery( this ).val() );\n\t\t\t} else {\n\t\t\t\tval = value;\n\t\t\t}\n\n\t\t\t// Treat null/undefined as \"\"; convert numbers to string\n\t\t\tif ( val == null ) {\n\t\t\t\tval = \"\";\n\n\t\t\t} else if ( typeof val === \"number\" ) {\n\t\t\t\tval += \"\";\n\n\t\t\t} else if ( Array.isArray( val ) ) {\n\t\t\t\tval = jQuery.map( val, function( value ) {\n\t\t\t\t\treturn value == null ? \"\" : value + \"\";\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\thooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];\n\n\t\t\t// If set returns undefined, fall back to normal setting\n\t\t\tif ( !hooks || !( \"set\" in hooks ) || hooks.set( this, val, \"value\" ) === undefined ) {\n\t\t\t\tthis.value = val;\n\t\t\t}\n\t\t} );\n\t}\n} );\n\njQuery.extend( {\n\tvalHooks: {\n\t\toption: {\n\t\t\tget: function( elem ) {\n\n\t\t\t\tvar val = jQuery.find.attr( elem, \"value\" );\n\t\t\t\treturn val != null ?\n\t\t\t\t\tval :\n\n\t\t\t\t\t// Support: IE <=10 - 11 only\n\t\t\t\t\t// option.text throws exceptions (#14686, #14858)\n\t\t\t\t\t// Strip and collapse whitespace\n\t\t\t\t\t// https://html.spec.whatwg.org/#strip-and-collapse-whitespace\n\t\t\t\t\tstripAndCollapse( jQuery.text( elem ) );\n\t\t\t}\n\t\t},\n\t\tselect: {\n\t\t\tget: function( elem ) {\n\t\t\t\tvar value, option, i,\n\t\t\t\t\toptions = elem.options,\n\t\t\t\t\tindex = elem.selectedIndex,\n\t\t\t\t\tone = elem.type === \"select-one\",\n\t\t\t\t\tvalues = one ? null : [],\n\t\t\t\t\tmax = one ? index + 1 : options.length;\n\n\t\t\t\tif ( index < 0 ) {\n\t\t\t\t\ti = max;\n\n\t\t\t\t} else {\n\t\t\t\t\ti = one ? index : 0;\n\t\t\t\t}\n\n\t\t\t\t// Loop through all the selected options\n\t\t\t\tfor ( ; i < max; i++ ) {\n\t\t\t\t\toption = options[ i ];\n\n\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t// IE8-9 doesn't update selected after form reset (#2551)\n\t\t\t\t\tif ( ( option.selected || i === index ) &&\n\n\t\t\t\t\t\t\t// Don't return options that are disabled or in a disabled optgroup\n\t\t\t\t\t\t\t!option.disabled &&\n\t\t\t\t\t\t\t( !option.parentNode.disabled ||\n\t\t\t\t\t\t\t\t!nodeName( option.parentNode, \"optgroup\" ) ) ) {\n\n\t\t\t\t\t\t// Get the specific value for the option\n\t\t\t\t\t\tvalue = jQuery( option ).val();\n\n\t\t\t\t\t\t// We don't need an array for one selects\n\t\t\t\t\t\tif ( one ) {\n\t\t\t\t\t\t\treturn value;\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\t// Multi-Selects return an array\n\t\t\t\t\t\tvalues.push( value );\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\treturn values;\n\t\t\t},\n\n\t\t\tset: function( elem, value ) {\n\t\t\t\tvar optionSet, option,\n\t\t\t\t\toptions = elem.options,\n\t\t\t\t\tvalues = jQuery.makeArray( value ),\n\t\t\t\t\ti = options.length;\n\n\t\t\t\twhile ( i-- ) {\n\t\t\t\t\toption = options[ i ];\n\n\t\t\t\t\t/* eslint-disable no-cond-assign */\n\n\t\t\t\t\tif ( option.selected =\n\t\t\t\t\t\tjQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1\n\t\t\t\t\t) {\n\t\t\t\t\t\toptionSet = true;\n\t\t\t\t\t}\n\n\t\t\t\t\t/* eslint-enable no-cond-assign */\n\t\t\t\t}\n\n\t\t\t\t// Force browsers to behave consistently when non-matching value is set\n\t\t\t\tif ( !optionSet ) {\n\t\t\t\t\telem.selectedIndex = -1;\n\t\t\t\t}\n\t\t\t\treturn values;\n\t\t\t}\n\t\t}\n\t}\n} );\n\n// Radios and checkboxes getter/setter\njQuery.each( [ \"radio\", \"checkbox\" ], function() {\n\tjQuery.valHooks[ this ] = {\n\t\tset: function( elem, value ) {\n\t\t\tif ( Array.isArray( value ) ) {\n\t\t\t\treturn ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );\n\t\t\t}\n\t\t}\n\t};\n\tif ( !support.checkOn ) {\n\t\tjQuery.valHooks[ this ].get = function( elem ) {\n\t\t\treturn elem.getAttribute( \"value\" ) === null ? \"on\" : elem.value;\n\t\t};\n\t}\n} );\n\n\n\n\n// Return jQuery for attributes-only inclusion\n\n\nsupport.focusin = \"onfocusin\" in window;\n\n\nvar rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,\n\tstopPropagationCallback = function( e ) {\n\t\te.stopPropagation();\n\t};\n\njQuery.extend( jQuery.event, {\n\n\ttrigger: function( event, data, elem, onlyHandlers ) {\n\n\t\tvar i, cur, tmp, bubbleType, ontype, handle, special, lastElement,\n\t\t\teventPath = [ elem || document ],\n\t\t\ttype = hasOwn.call( event, \"type\" ) ? event.type : event,\n\t\t\tnamespaces = hasOwn.call( event, \"namespace\" ) ? event.namespace.split( \".\" ) : [];\n\n\t\tcur = lastElement = tmp = elem = elem || document;\n\n\t\t// Don't do events on text and comment nodes\n\t\tif ( elem.nodeType === 3 || elem.nodeType === 8 ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// focus/blur morphs to focusin/out; ensure we're not firing them right now\n\t\tif ( rfocusMorph.test( type + jQuery.event.triggered ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( type.indexOf( \".\" ) > -1 ) {\n\n\t\t\t// Namespaced trigger; create a regexp to match event type in handle()\n\t\t\tnamespaces = type.split( \".\" );\n\t\t\ttype = namespaces.shift();\n\t\t\tnamespaces.sort();\n\t\t}\n\t\tontype = type.indexOf( \":\" ) < 0 && \"on\" + type;\n\n\t\t// Caller can pass in a jQuery.Event object, Object, or just an event type string\n\t\tevent = event[ jQuery.expando ] ?\n\t\t\tevent :\n\t\t\tnew jQuery.Event( type, typeof event === \"object\" && event );\n\n\t\t// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)\n\t\tevent.isTrigger = onlyHandlers ? 2 : 3;\n\t\tevent.namespace = namespaces.join( \".\" );\n\t\tevent.rnamespace = event.namespace ?\n\t\t\tnew RegExp( \"(^|\\\\.)\" + namespaces.join( \"\\\\.(?:.*\\\\.|)\" ) + \"(\\\\.|$)\" ) :\n\t\t\tnull;\n\n\t\t// Clean up the event in case it is being reused\n\t\tevent.result = undefined;\n\t\tif ( !event.target ) {\n\t\t\tevent.target = elem;\n\t\t}\n\n\t\t// Clone any incoming data and prepend the event, creating the handler arg list\n\t\tdata = data == null ?\n\t\t\t[ event ] :\n\t\t\tjQuery.makeArray( data, [ event ] );\n\n\t\t// Allow special events to draw outside the lines\n\t\tspecial = jQuery.event.special[ type ] || {};\n\t\tif ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Determine event propagation path in advance, per W3C events spec (#9951)\n\t\t// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)\n\t\tif ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {\n\n\t\t\tbubbleType = special.delegateType || type;\n\t\t\tif ( !rfocusMorph.test( bubbleType + type ) ) {\n\t\t\t\tcur = cur.parentNode;\n\t\t\t}\n\t\t\tfor ( ; cur; cur = cur.parentNode ) {\n\t\t\t\teventPath.push( cur );\n\t\t\t\ttmp = cur;\n\t\t\t}\n\n\t\t\t// Only add window if we got to document (e.g., not plain obj or detached DOM)\n\t\t\tif ( tmp === ( elem.ownerDocument || document ) ) {\n\t\t\t\teventPath.push( tmp.defaultView || tmp.parentWindow || window );\n\t\t\t}\n\t\t}\n\n\t\t// Fire handlers on the event path\n\t\ti = 0;\n\t\twhile ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {\n\t\t\tlastElement = cur;\n\t\t\tevent.type = i > 1 ?\n\t\t\t\tbubbleType :\n\t\t\t\tspecial.bindType || type;\n\n\t\t\t// jQuery handler\n\t\t\thandle = ( dataPriv.get( cur, \"events\" ) || {} )[ event.type ] &&\n\t\t\t\tdataPriv.get( cur, \"handle\" );\n\t\t\tif ( handle ) {\n\t\t\t\thandle.apply( cur, data );\n\t\t\t}\n\n\t\t\t// Native handler\n\t\t\thandle = ontype && cur[ ontype ];\n\t\t\tif ( handle && handle.apply && acceptData( cur ) ) {\n\t\t\t\tevent.result = handle.apply( cur, data );\n\t\t\t\tif ( event.result === false ) {\n\t\t\t\t\tevent.preventDefault();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tevent.type = type;\n\n\t\t// If nobody prevented the default action, do it now\n\t\tif ( !onlyHandlers && !event.isDefaultPrevented() ) {\n\n\t\t\tif ( ( !special._default ||\n\t\t\t\tspecial._default.apply( eventPath.pop(), data ) === false ) &&\n\t\t\t\tacceptData( elem ) ) {\n\n\t\t\t\t// Call a native DOM method on the target with the same name as the event.\n\t\t\t\t// Don't do default actions on window, that's where global variables be (#6170)\n\t\t\t\tif ( ontype && isFunction( elem[ type ] ) && !isWindow( elem ) ) {\n\n\t\t\t\t\t// Don't re-trigger an onFOO event when we call its FOO() method\n\t\t\t\t\ttmp = elem[ ontype ];\n\n\t\t\t\t\tif ( tmp ) {\n\t\t\t\t\t\telem[ ontype ] = null;\n\t\t\t\t\t}\n\n\t\t\t\t\t// Prevent re-triggering of the same event, since we already bubbled it above\n\t\t\t\t\tjQuery.event.triggered = type;\n\n\t\t\t\t\tif ( event.isPropagationStopped() ) {\n\t\t\t\t\t\tlastElement.addEventListener( type, stopPropagationCallback );\n\t\t\t\t\t}\n\n\t\t\t\t\telem[ type ]();\n\n\t\t\t\t\tif ( event.isPropagationStopped() ) {\n\t\t\t\t\t\tlastElement.removeEventListener( type, stopPropagationCallback );\n\t\t\t\t\t}\n\n\t\t\t\t\tjQuery.event.triggered = undefined;\n\n\t\t\t\t\tif ( tmp ) {\n\t\t\t\t\t\telem[ ontype ] = tmp;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn event.result;\n\t},\n\n\t// Piggyback on a donor event to simulate a different one\n\t// Used only for `focus(in | out)` events\n\tsimulate: function( type, elem, event ) {\n\t\tvar e = jQuery.extend(\n\t\t\tnew jQuery.Event(),\n\t\t\tevent,\n\t\t\t{\n\t\t\t\ttype: type,\n\t\t\t\tisSimulated: true\n\t\t\t}\n\t\t);\n\n\t\tjQuery.event.trigger( e, null, elem );\n\t}\n\n} );\n\njQuery.fn.extend( {\n\n\ttrigger: function( type, data ) {\n\t\treturn this.each( function() {\n\t\t\tjQuery.event.trigger( type, data, this );\n\t\t} );\n\t},\n\ttriggerHandler: function( type, data ) {\n\t\tvar elem = this[ 0 ];\n\t\tif ( elem ) {\n\t\t\treturn jQuery.event.trigger( type, data, elem, true );\n\t\t}\n\t}\n} );\n\n\n// Support: Firefox <=44\n// Firefox doesn't have focus(in | out) events\n// Related ticket - https://bugzilla.mozilla.org/show_bug.cgi?id=687787\n//\n// Support: Chrome <=48 - 49, Safari <=9.0 - 9.1\n// focus(in | out) events fire after focus & blur events,\n// which is spec violation - http://www.w3.org/TR/DOM-Level-3-Events/#events-focusevent-event-order\n// Related ticket - https://bugs.chromium.org/p/chromium/issues/detail?id=449857\nif ( !support.focusin ) {\n\tjQuery.each( { focus: \"focusin\", blur: \"focusout\" }, function( orig, fix ) {\n\n\t\t// Attach a single capturing handler on the document while someone wants focusin/focusout\n\t\tvar handler = function( event ) {\n\t\t\tjQuery.event.simulate( fix, event.target, jQuery.event.fix( event ) );\n\t\t};\n\n\t\tjQuery.event.special[ fix ] = {\n\t\t\tsetup: function() {\n\t\t\t\tvar doc = this.ownerDocument || this,\n\t\t\t\t\tattaches = dataPriv.access( doc, fix );\n\n\t\t\t\tif ( !attaches ) {\n\t\t\t\t\tdoc.addEventListener( orig, handler, true );\n\t\t\t\t}\n\t\t\t\tdataPriv.access( doc, fix, ( attaches || 0 ) + 1 );\n\t\t\t},\n\t\t\tteardown: function() {\n\t\t\t\tvar doc = this.ownerDocument || this,\n\t\t\t\t\tattaches = dataPriv.access( doc, fix ) - 1;\n\n\t\t\t\tif ( !attaches ) {\n\t\t\t\t\tdoc.removeEventListener( orig, handler, true );\n\t\t\t\t\tdataPriv.remove( doc, fix );\n\n\t\t\t\t} else {\n\t\t\t\t\tdataPriv.access( doc, fix, attaches );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t} );\n}\nvar location = window.location;\n\nvar nonce = Date.now();\n\nvar rquery = ( /\\?/ );\n\n\n\n// Cross-browser xml parsing\njQuery.parseXML = function( data ) {\n\tvar xml;\n\tif ( !data || typeof data !== \"string\" ) {\n\t\treturn null;\n\t}\n\n\t// Support: IE 9 - 11 only\n\t// IE throws on parseFromString with invalid input.\n\ttry {\n\t\txml = ( new window.DOMParser() ).parseFromString( data, \"text/xml\" );\n\t} catch ( e ) {\n\t\txml = undefined;\n\t}\n\n\tif ( !xml || xml.getElementsByTagName( \"parsererror\" ).length ) {\n\t\tjQuery.error( \"Invalid XML: \" + data );\n\t}\n\treturn xml;\n};\n\n\nvar\n\trbracket = /\\[\\]$/,\n\trCRLF = /\\r?\\n/g,\n\trsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,\n\trsubmittable = /^(?:input|select|textarea|keygen)/i;\n\nfunction buildParams( prefix, obj, traditional, add ) {\n\tvar name;\n\n\tif ( Array.isArray( obj ) ) {\n\n\t\t// Serialize array item.\n\t\tjQuery.each( obj, function( i, v ) {\n\t\t\tif ( traditional || rbracket.test( prefix ) ) {\n\n\t\t\t\t// Treat each array item as a scalar.\n\t\t\t\tadd( prefix, v );\n\n\t\t\t} else {\n\n\t\t\t\t// Item is non-scalar (array or object), encode its numeric index.\n\t\t\t\tbuildParams(\n\t\t\t\t\tprefix + \"[\" + ( typeof v === \"object\" && v != null ? i : \"\" ) + \"]\",\n\t\t\t\t\tv,\n\t\t\t\t\ttraditional,\n\t\t\t\t\tadd\n\t\t\t\t);\n\t\t\t}\n\t\t} );\n\n\t} else if ( !traditional && toType( obj ) === \"object\" ) {\n\n\t\t// Serialize object item.\n\t\tfor ( name in obj ) {\n\t\t\tbuildParams( prefix + \"[\" + name + \"]\", obj[ name ], traditional, add );\n\t\t}\n\n\t} else {\n\n\t\t// Serialize scalar item.\n\t\tadd( prefix, obj );\n\t}\n}\n\n// Serialize an array of form elements or a set of\n// key/values into a query string\njQuery.param = function( a, traditional ) {\n\tvar prefix,\n\t\ts = [],\n\t\tadd = function( key, valueOrFunction ) {\n\n\t\t\t// If value is a function, invoke it and use its return value\n\t\t\tvar value = isFunction( valueOrFunction ) ?\n\t\t\t\tvalueOrFunction() :\n\t\t\t\tvalueOrFunction;\n\n\t\t\ts[ s.length ] = encodeURIComponent( key ) + \"=\" +\n\t\t\t\tencodeURIComponent( value == null ? \"\" : value );\n\t\t};\n\n\tif ( a == null ) {\n\t\treturn \"\";\n\t}\n\n\t// If an array was passed in, assume that it is an array of form elements.\n\tif ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {\n\n\t\t// Serialize the form elements\n\t\tjQuery.each( a, function() {\n\t\t\tadd( this.name, this.value );\n\t\t} );\n\n\t} else {\n\n\t\t// If traditional, encode the \"old\" way (the way 1.3.2 or older\n\t\t// did it), otherwise encode params recursively.\n\t\tfor ( prefix in a ) {\n\t\t\tbuildParams( prefix, a[ prefix ], traditional, add );\n\t\t}\n\t}\n\n\t// Return the resulting serialization\n\treturn s.join( \"&\" );\n};\n\njQuery.fn.extend( {\n\tserialize: function() {\n\t\treturn jQuery.param( this.serializeArray() );\n\t},\n\tserializeArray: function() {\n\t\treturn this.map( function() {\n\n\t\t\t// Can add propHook for \"elements\" to filter or add form elements\n\t\t\tvar elements = jQuery.prop( this, \"elements\" );\n\t\t\treturn elements ? jQuery.makeArray( elements ) : this;\n\t\t} )\n\t\t.filter( function() {\n\t\t\tvar type = this.type;\n\n\t\t\t// Use .is( \":disabled\" ) so that fieldset[disabled] works\n\t\t\treturn this.name && !jQuery( this ).is( \":disabled\" ) &&\n\t\t\t\trsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&\n\t\t\t\t( this.checked || !rcheckableType.test( type ) );\n\t\t} )\n\t\t.map( function( i, elem ) {\n\t\t\tvar val = jQuery( this ).val();\n\n\t\t\tif ( val == null ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( Array.isArray( val ) ) {\n\t\t\t\treturn jQuery.map( val, function( val ) {\n\t\t\t\t\treturn { name: elem.name, value: val.replace( rCRLF, \"\\r\\n\" ) };\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\treturn { name: elem.name, value: val.replace( rCRLF, \"\\r\\n\" ) };\n\t\t} ).get();\n\t}\n} );\n\n\nvar\n\tr20 = /%20/g,\n\trhash = /#.*$/,\n\trantiCache = /([?&])_=[^&]*/,\n\trheaders = /^(.*?):[ \\t]*([^\\r\\n]*)$/mg,\n\n\t// #7653, #8125, #8152: local protocol detection\n\trlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,\n\trnoContent = /^(?:GET|HEAD)$/,\n\trprotocol = /^\\/\\//,\n\n\t/* Prefilters\n\t * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)\n\t * 2) These are called:\n\t * - BEFORE asking for a transport\n\t * - AFTER param serialization (s.data is a string if s.processData is true)\n\t * 3) key is the dataType\n\t * 4) the catchall symbol \"*\" can be used\n\t * 5) execution will start with transport dataType and THEN continue down to \"*\" if needed\n\t */\n\tprefilters = {},\n\n\t/* Transports bindings\n\t * 1) key is the dataType\n\t * 2) the catchall symbol \"*\" can be used\n\t * 3) selection will start with transport dataType and THEN go to \"*\" if needed\n\t */\n\ttransports = {},\n\n\t// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression\n\tallTypes = \"*/\".concat( \"*\" ),\n\n\t// Anchor tag for parsing the document origin\n\toriginAnchor = document.createElement( \"a\" );\n\toriginAnchor.href = location.href;\n\n// Base \"constructor\" for jQuery.ajaxPrefilter and jQuery.ajaxTransport\nfunction addToPrefiltersOrTransports( structure ) {\n\n\t// dataTypeExpression is optional and defaults to \"*\"\n\treturn function( dataTypeExpression, func ) {\n\n\t\tif ( typeof dataTypeExpression !== \"string\" ) {\n\t\t\tfunc = dataTypeExpression;\n\t\t\tdataTypeExpression = \"*\";\n\t\t}\n\n\t\tvar dataType,\n\t\t\ti = 0,\n\t\t\tdataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];\n\n\t\tif ( isFunction( func ) ) {\n\n\t\t\t// For each dataType in the dataTypeExpression\n\t\t\twhile ( ( dataType = dataTypes[ i++ ] ) ) {\n\n\t\t\t\t// Prepend if requested\n\t\t\t\tif ( dataType[ 0 ] === \"+\" ) {\n\t\t\t\t\tdataType = dataType.slice( 1 ) || \"*\";\n\t\t\t\t\t( structure[ dataType ] = structure[ dataType ] || [] ).unshift( func );\n\n\t\t\t\t// Otherwise append\n\t\t\t\t} else {\n\t\t\t\t\t( structure[ dataType ] = structure[ dataType ] || [] ).push( func );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t};\n}\n\n// Base inspection function for prefilters and transports\nfunction inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {\n\n\tvar inspected = {},\n\t\tseekingTransport = ( structure === transports );\n\n\tfunction inspect( dataType ) {\n\t\tvar selected;\n\t\tinspected[ dataType ] = true;\n\t\tjQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {\n\t\t\tvar dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );\n\t\t\tif ( typeof dataTypeOrTransport === \"string\" &&\n\t\t\t\t!seekingTransport && !inspected[ dataTypeOrTransport ] ) {\n\n\t\t\t\toptions.dataTypes.unshift( dataTypeOrTransport );\n\t\t\t\tinspect( dataTypeOrTransport );\n\t\t\t\treturn false;\n\t\t\t} else if ( seekingTransport ) {\n\t\t\t\treturn !( selected = dataTypeOrTransport );\n\t\t\t}\n\t\t} );\n\t\treturn selected;\n\t}\n\n\treturn inspect( options.dataTypes[ 0 ] ) || !inspected[ \"*\" ] && inspect( \"*\" );\n}\n\n// A special extend for ajax options\n// that takes \"flat\" options (not to be deep extended)\n// Fixes #9887\nfunction ajaxExtend( target, src ) {\n\tvar key, deep,\n\t\tflatOptions = jQuery.ajaxSettings.flatOptions || {};\n\n\tfor ( key in src ) {\n\t\tif ( src[ key ] !== undefined ) {\n\t\t\t( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];\n\t\t}\n\t}\n\tif ( deep ) {\n\t\tjQuery.extend( true, target, deep );\n\t}\n\n\treturn target;\n}\n\n/* Handles responses to an ajax request:\n * - finds the right dataType (mediates between content-type and expected dataType)\n * - returns the corresponding response\n */\nfunction ajaxHandleResponses( s, jqXHR, responses ) {\n\n\tvar ct, type, finalDataType, firstDataType,\n\t\tcontents = s.contents,\n\t\tdataTypes = s.dataTypes;\n\n\t// Remove auto dataType and get content-type in the process\n\twhile ( dataTypes[ 0 ] === \"*\" ) {\n\t\tdataTypes.shift();\n\t\tif ( ct === undefined ) {\n\t\t\tct = s.mimeType || jqXHR.getResponseHeader( \"Content-Type\" );\n\t\t}\n\t}\n\n\t// Check if we're dealing with a known content-type\n\tif ( ct ) {\n\t\tfor ( type in contents ) {\n\t\t\tif ( contents[ type ] && contents[ type ].test( ct ) ) {\n\t\t\t\tdataTypes.unshift( type );\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\t// Check to see if we have a response for the expected dataType\n\tif ( dataTypes[ 0 ] in responses ) {\n\t\tfinalDataType = dataTypes[ 0 ];\n\t} else {\n\n\t\t// Try convertible dataTypes\n\t\tfor ( type in responses ) {\n\t\t\tif ( !dataTypes[ 0 ] || s.converters[ type + \" \" + dataTypes[ 0 ] ] ) {\n\t\t\t\tfinalDataType = type;\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tif ( !firstDataType ) {\n\t\t\t\tfirstDataType = type;\n\t\t\t}\n\t\t}\n\n\t\t// Or just use first one\n\t\tfinalDataType = finalDataType || firstDataType;\n\t}\n\n\t// If we found a dataType\n\t// We add the dataType to the list if needed\n\t// and return the corresponding response\n\tif ( finalDataType ) {\n\t\tif ( finalDataType !== dataTypes[ 0 ] ) {\n\t\t\tdataTypes.unshift( finalDataType );\n\t\t}\n\t\treturn responses[ finalDataType ];\n\t}\n}\n\n/* Chain conversions given the request and the original response\n * Also sets the responseXXX fields on the jqXHR instance\n */\nfunction ajaxConvert( s, response, jqXHR, isSuccess ) {\n\tvar conv2, current, conv, tmp, prev,\n\t\tconverters = {},\n\n\t\t// Work with a copy of dataTypes in case we need to modify it for conversion\n\t\tdataTypes = s.dataTypes.slice();\n\n\t// Create converters map with lowercased keys\n\tif ( dataTypes[ 1 ] ) {\n\t\tfor ( conv in s.converters ) {\n\t\t\tconverters[ conv.toLowerCase() ] = s.converters[ conv ];\n\t\t}\n\t}\n\n\tcurrent = dataTypes.shift();\n\n\t// Convert to each sequential dataType\n\twhile ( current ) {\n\n\t\tif ( s.responseFields[ current ] ) {\n\t\t\tjqXHR[ s.responseFields[ current ] ] = response;\n\t\t}\n\n\t\t// Apply the dataFilter if provided\n\t\tif ( !prev && isSuccess && s.dataFilter ) {\n\t\t\tresponse = s.dataFilter( response, s.dataType );\n\t\t}\n\n\t\tprev = current;\n\t\tcurrent = dataTypes.shift();\n\n\t\tif ( current ) {\n\n\t\t\t// There's only work to do if current dataType is non-auto\n\t\t\tif ( current === \"*\" ) {\n\n\t\t\t\tcurrent = prev;\n\n\t\t\t// Convert response if prev dataType is non-auto and differs from current\n\t\t\t} else if ( prev !== \"*\" && prev !== current ) {\n\n\t\t\t\t// Seek a direct converter\n\t\t\t\tconv = converters[ prev + \" \" + current ] || converters[ \"* \" + current ];\n\n\t\t\t\t// If none found, seek a pair\n\t\t\t\tif ( !conv ) {\n\t\t\t\t\tfor ( conv2 in converters ) {\n\n\t\t\t\t\t\t// If conv2 outputs current\n\t\t\t\t\t\ttmp = conv2.split( \" \" );\n\t\t\t\t\t\tif ( tmp[ 1 ] === current ) {\n\n\t\t\t\t\t\t\t// If prev can be converted to accepted input\n\t\t\t\t\t\t\tconv = converters[ prev + \" \" + tmp[ 0 ] ] ||\n\t\t\t\t\t\t\t\tconverters[ \"* \" + tmp[ 0 ] ];\n\t\t\t\t\t\t\tif ( conv ) {\n\n\t\t\t\t\t\t\t\t// Condense equivalence converters\n\t\t\t\t\t\t\t\tif ( conv === true ) {\n\t\t\t\t\t\t\t\t\tconv = converters[ conv2 ];\n\n\t\t\t\t\t\t\t\t// Otherwise, insert the intermediate dataType\n\t\t\t\t\t\t\t\t} else if ( converters[ conv2 ] !== true ) {\n\t\t\t\t\t\t\t\t\tcurrent = tmp[ 0 ];\n\t\t\t\t\t\t\t\t\tdataTypes.unshift( tmp[ 1 ] );\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Apply converter (if not an equivalence)\n\t\t\t\tif ( conv !== true ) {\n\n\t\t\t\t\t// Unless errors are allowed to bubble, catch and return them\n\t\t\t\t\tif ( conv && s.throws ) {\n\t\t\t\t\t\tresponse = conv( response );\n\t\t\t\t\t} else {\n\t\t\t\t\t\ttry {\n\t\t\t\t\t\t\tresponse = conv( response );\n\t\t\t\t\t\t} catch ( e ) {\n\t\t\t\t\t\t\treturn {\n\t\t\t\t\t\t\t\tstate: \"parsererror\",\n\t\t\t\t\t\t\t\terror: conv ? e : \"No conversion from \" + prev + \" to \" + current\n\t\t\t\t\t\t\t};\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn { state: \"success\", data: response };\n}\n\njQuery.extend( {\n\n\t// Counter for holding the number of active queries\n\tactive: 0,\n\n\t// Last-Modified header cache for next request\n\tlastModified: {},\n\tetag: {},\n\n\tajaxSettings: {\n\t\turl: location.href,\n\t\ttype: \"GET\",\n\t\tisLocal: rlocalProtocol.test( location.protocol ),\n\t\tglobal: true,\n\t\tprocessData: true,\n\t\tasync: true,\n\t\tcontentType: \"application/x-www-form-urlencoded; charset=UTF-8\",\n\n\t\t/*\n\t\ttimeout: 0,\n\t\tdata: null,\n\t\tdataType: null,\n\t\tusername: null,\n\t\tpassword: null,\n\t\tcache: null,\n\t\tthrows: false,\n\t\ttraditional: false,\n\t\theaders: {},\n\t\t*/\n\n\t\taccepts: {\n\t\t\t\"*\": allTypes,\n\t\t\ttext: \"text/plain\",\n\t\t\thtml: \"text/html\",\n\t\t\txml: \"application/xml, text/xml\",\n\t\t\tjson: \"application/json, text/javascript\"\n\t\t},\n\n\t\tcontents: {\n\t\t\txml: /\\bxml\\b/,\n\t\t\thtml: /\\bhtml/,\n\t\t\tjson: /\\bjson\\b/\n\t\t},\n\n\t\tresponseFields: {\n\t\t\txml: \"responseXML\",\n\t\t\ttext: \"responseText\",\n\t\t\tjson: \"responseJSON\"\n\t\t},\n\n\t\t// Data converters\n\t\t// Keys separate source (or catchall \"*\") and destination types with a single space\n\t\tconverters: {\n\n\t\t\t// Convert anything to text\n\t\t\t\"* text\": String,\n\n\t\t\t// Text to html (true = no transformation)\n\t\t\t\"text html\": true,\n\n\t\t\t// Evaluate text as a json expression\n\t\t\t\"text json\": JSON.parse,\n\n\t\t\t// Parse text as xml\n\t\t\t\"text xml\": jQuery.parseXML\n\t\t},\n\n\t\t// For options that shouldn't be deep extended:\n\t\t// you can add your own custom options here if\n\t\t// and when you create one that shouldn't be\n\t\t// deep extended (see ajaxExtend)\n\t\tflatOptions: {\n\t\t\turl: true,\n\t\t\tcontext: true\n\t\t}\n\t},\n\n\t// Creates a full fledged settings object into target\n\t// with both ajaxSettings and settings fields.\n\t// If target is omitted, writes into ajaxSettings.\n\tajaxSetup: function( target, settings ) {\n\t\treturn settings ?\n\n\t\t\t// Building a settings object\n\t\t\tajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :\n\n\t\t\t// Extending ajaxSettings\n\t\t\tajaxExtend( jQuery.ajaxSettings, target );\n\t},\n\n\tajaxPrefilter: addToPrefiltersOrTransports( prefilters ),\n\tajaxTransport: addToPrefiltersOrTransports( transports ),\n\n\t// Main method\n\tajax: function( url, options ) {\n\n\t\t// If url is an object, simulate pre-1.5 signature\n\t\tif ( typeof url === \"object\" ) {\n\t\t\toptions = url;\n\t\t\turl = undefined;\n\t\t}\n\n\t\t// Force options to be an object\n\t\toptions = options || {};\n\n\t\tvar transport,\n\n\t\t\t// URL without anti-cache param\n\t\t\tcacheURL,\n\n\t\t\t// Response headers\n\t\t\tresponseHeadersString,\n\t\t\tresponseHeaders,\n\n\t\t\t// timeout handle\n\t\t\ttimeoutTimer,\n\n\t\t\t// Url cleanup var\n\t\t\turlAnchor,\n\n\t\t\t// Request state (becomes false upon send and true upon completion)\n\t\t\tcompleted,\n\n\t\t\t// To know if global events are to be dispatched\n\t\t\tfireGlobals,\n\n\t\t\t// Loop variable\n\t\t\ti,\n\n\t\t\t// uncached part of the url\n\t\t\tuncached,\n\n\t\t\t// Create the final options object\n\t\t\ts = jQuery.ajaxSetup( {}, options ),\n\n\t\t\t// Callbacks context\n\t\t\tcallbackContext = s.context || s,\n\n\t\t\t// Context for global events is callbackContext if it is a DOM node or jQuery collection\n\t\t\tglobalEventContext = s.context &&\n\t\t\t\t( callbackContext.nodeType || callbackContext.jquery ) ?\n\t\t\t\t\tjQuery( callbackContext ) :\n\t\t\t\t\tjQuery.event,\n\n\t\t\t// Deferreds\n\t\t\tdeferred = jQuery.Deferred(),\n\t\t\tcompleteDeferred = jQuery.Callbacks( \"once memory\" ),\n\n\t\t\t// Status-dependent callbacks\n\t\t\tstatusCode = s.statusCode || {},\n\n\t\t\t// Headers (they are sent all at once)\n\t\t\trequestHeaders = {},\n\t\t\trequestHeadersNames = {},\n\n\t\t\t// Default abort message\n\t\t\tstrAbort = \"canceled\",\n\n\t\t\t// Fake xhr\n\t\t\tjqXHR = {\n\t\t\t\treadyState: 0,\n\n\t\t\t\t// Builds headers hashtable if needed\n\t\t\t\tgetResponseHeader: function( key ) {\n\t\t\t\t\tvar match;\n\t\t\t\t\tif ( completed ) {\n\t\t\t\t\t\tif ( !responseHeaders ) {\n\t\t\t\t\t\t\tresponseHeaders = {};\n\t\t\t\t\t\t\twhile ( ( match = rheaders.exec( responseHeadersString ) ) ) {\n\t\t\t\t\t\t\t\tresponseHeaders[ match[ 1 ].toLowerCase() + \" \" ] =\n\t\t\t\t\t\t\t\t\t( responseHeaders[ match[ 1 ].toLowerCase() + \" \" ] || [] )\n\t\t\t\t\t\t\t\t\t\t.concat( match[ 2 ] );\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t\tmatch = responseHeaders[ key.toLowerCase() + \" \" ];\n\t\t\t\t\t}\n\t\t\t\t\treturn match == null ? null : match.join( \", \" );\n\t\t\t\t},\n\n\t\t\t\t// Raw string\n\t\t\t\tgetAllResponseHeaders: function() {\n\t\t\t\t\treturn completed ? responseHeadersString : null;\n\t\t\t\t},\n\n\t\t\t\t// Caches the header\n\t\t\t\tsetRequestHeader: function( name, value ) {\n\t\t\t\t\tif ( completed == null ) {\n\t\t\t\t\t\tname = requestHeadersNames[ name.toLowerCase() ] =\n\t\t\t\t\t\t\trequestHeadersNames[ name.toLowerCase() ] || name;\n\t\t\t\t\t\trequestHeaders[ name ] = value;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Overrides response content-type header\n\t\t\t\toverrideMimeType: function( type ) {\n\t\t\t\t\tif ( completed == null ) {\n\t\t\t\t\t\ts.mimeType = type;\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Status-dependent callbacks\n\t\t\t\tstatusCode: function( map ) {\n\t\t\t\t\tvar code;\n\t\t\t\t\tif ( map ) {\n\t\t\t\t\t\tif ( completed ) {\n\n\t\t\t\t\t\t\t// Execute the appropriate callbacks\n\t\t\t\t\t\t\tjqXHR.always( map[ jqXHR.status ] );\n\t\t\t\t\t\t} else {\n\n\t\t\t\t\t\t\t// Lazy-add the new callbacks in a way that preserves old ones\n\t\t\t\t\t\t\tfor ( code in map ) {\n\t\t\t\t\t\t\t\tstatusCode[ code ] = [ statusCode[ code ], map[ code ] ];\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\treturn this;\n\t\t\t\t},\n\n\t\t\t\t// Cancel the request\n\t\t\t\tabort: function( statusText ) {\n\t\t\t\t\tvar finalText = statusText || strAbort;\n\t\t\t\t\tif ( transport ) {\n\t\t\t\t\t\ttransport.abort( finalText );\n\t\t\t\t\t}\n\t\t\t\t\tdone( 0, finalText );\n\t\t\t\t\treturn this;\n\t\t\t\t}\n\t\t\t};\n\n\t\t// Attach deferreds\n\t\tdeferred.promise( jqXHR );\n\n\t\t// Add protocol if not provided (prefilters might expect it)\n\t\t// Handle falsy url in the settings object (#10093: consistency with old signature)\n\t\t// We also use the url parameter if available\n\t\ts.url = ( ( url || s.url || location.href ) + \"\" )\n\t\t\t.replace( rprotocol, location.protocol + \"//\" );\n\n\t\t// Alias method option to type as per ticket #12004\n\t\ts.type = options.method || options.type || s.method || s.type;\n\n\t\t// Extract dataTypes list\n\t\ts.dataTypes = ( s.dataType || \"*\" ).toLowerCase().match( rnothtmlwhite ) || [ \"\" ];\n\n\t\t// A cross-domain request is in order when the origin doesn't match the current origin.\n\t\tif ( s.crossDomain == null ) {\n\t\t\turlAnchor = document.createElement( \"a\" );\n\n\t\t\t// Support: IE <=8 - 11, Edge 12 - 15\n\t\t\t// IE throws exception on accessing the href property if url is malformed,\n\t\t\t// e.g. http://example.com:80x/\n\t\t\ttry {\n\t\t\t\turlAnchor.href = s.url;\n\n\t\t\t\t// Support: IE <=8 - 11 only\n\t\t\t\t// Anchor's host property isn't correctly set when s.url is relative\n\t\t\t\turlAnchor.href = urlAnchor.href;\n\t\t\t\ts.crossDomain = originAnchor.protocol + \"//\" + originAnchor.host !==\n\t\t\t\t\turlAnchor.protocol + \"//\" + urlAnchor.host;\n\t\t\t} catch ( e ) {\n\n\t\t\t\t// If there is an error parsing the URL, assume it is crossDomain,\n\t\t\t\t// it can be rejected by the transport if it is invalid\n\t\t\t\ts.crossDomain = true;\n\t\t\t}\n\t\t}\n\n\t\t// Convert data if not already a string\n\t\tif ( s.data && s.processData && typeof s.data !== \"string\" ) {\n\t\t\ts.data = jQuery.param( s.data, s.traditional );\n\t\t}\n\n\t\t// Apply prefilters\n\t\tinspectPrefiltersOrTransports( prefilters, s, options, jqXHR );\n\n\t\t// If request was aborted inside a prefilter, stop there\n\t\tif ( completed ) {\n\t\t\treturn jqXHR;\n\t\t}\n\n\t\t// We can fire global events as of now if asked to\n\t\t// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)\n\t\tfireGlobals = jQuery.event && s.global;\n\n\t\t// Watch for a new set of requests\n\t\tif ( fireGlobals && jQuery.active++ === 0 ) {\n\t\t\tjQuery.event.trigger( \"ajaxStart\" );\n\t\t}\n\n\t\t// Uppercase the type\n\t\ts.type = s.type.toUpperCase();\n\n\t\t// Determine if request has content\n\t\ts.hasContent = !rnoContent.test( s.type );\n\n\t\t// Save the URL in case we're toying with the If-Modified-Since\n\t\t// and/or If-None-Match header later on\n\t\t// Remove hash to simplify url manipulation\n\t\tcacheURL = s.url.replace( rhash, \"\" );\n\n\t\t// More options handling for requests with no content\n\t\tif ( !s.hasContent ) {\n\n\t\t\t// Remember the hash so we can put it back\n\t\t\tuncached = s.url.slice( cacheURL.length );\n\n\t\t\t// If data is available and should be processed, append data to url\n\t\t\tif ( s.data && ( s.processData || typeof s.data === \"string\" ) ) {\n\t\t\t\tcacheURL += ( rquery.test( cacheURL ) ? \"&\" : \"?\" ) + s.data;\n\n\t\t\t\t// #9682: remove data so that it's not used in an eventual retry\n\t\t\t\tdelete s.data;\n\t\t\t}\n\n\t\t\t// Add or update anti-cache param if needed\n\t\t\tif ( s.cache === false ) {\n\t\t\t\tcacheURL = cacheURL.replace( rantiCache, \"$1\" );\n\t\t\t\tuncached = ( rquery.test( cacheURL ) ? \"&\" : \"?\" ) + \"_=\" + ( nonce++ ) + uncached;\n\t\t\t}\n\n\t\t\t// Put hash and anti-cache on the URL that will be requested (gh-1732)\n\t\t\ts.url = cacheURL + uncached;\n\n\t\t// Change '%20' to '+' if this is encoded form body content (gh-2658)\n\t\t} else if ( s.data && s.processData &&\n\t\t\t( s.contentType || \"\" ).indexOf( \"application/x-www-form-urlencoded\" ) === 0 ) {\n\t\t\ts.data = s.data.replace( r20, \"+\" );\n\t\t}\n\n\t\t// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.\n\t\tif ( s.ifModified ) {\n\t\t\tif ( jQuery.lastModified[ cacheURL ] ) {\n\t\t\t\tjqXHR.setRequestHeader( \"If-Modified-Since\", jQuery.lastModified[ cacheURL ] );\n\t\t\t}\n\t\t\tif ( jQuery.etag[ cacheURL ] ) {\n\t\t\t\tjqXHR.setRequestHeader( \"If-None-Match\", jQuery.etag[ cacheURL ] );\n\t\t\t}\n\t\t}\n\n\t\t// Set the correct header, if data is being sent\n\t\tif ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {\n\t\t\tjqXHR.setRequestHeader( \"Content-Type\", s.contentType );\n\t\t}\n\n\t\t// Set the Accepts header for the server, depending on the dataType\n\t\tjqXHR.setRequestHeader(\n\t\t\t\"Accept\",\n\t\t\ts.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?\n\t\t\t\ts.accepts[ s.dataTypes[ 0 ] ] +\n\t\t\t\t\t( s.dataTypes[ 0 ] !== \"*\" ? \", \" + allTypes + \"; q=0.01\" : \"\" ) :\n\t\t\t\ts.accepts[ \"*\" ]\n\t\t);\n\n\t\t// Check for headers option\n\t\tfor ( i in s.headers ) {\n\t\t\tjqXHR.setRequestHeader( i, s.headers[ i ] );\n\t\t}\n\n\t\t// Allow custom headers/mimetypes and early abort\n\t\tif ( s.beforeSend &&\n\t\t\t( s.beforeSend.call( callbackContext, jqXHR, s ) === false || completed ) ) {\n\n\t\t\t// Abort if not done already and return\n\t\t\treturn jqXHR.abort();\n\t\t}\n\n\t\t// Aborting is no longer a cancellation\n\t\tstrAbort = \"abort\";\n\n\t\t// Install callbacks on deferreds\n\t\tcompleteDeferred.add( s.complete );\n\t\tjqXHR.done( s.success );\n\t\tjqXHR.fail( s.error );\n\n\t\t// Get transport\n\t\ttransport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );\n\n\t\t// If no transport, we auto-abort\n\t\tif ( !transport ) {\n\t\t\tdone( -1, \"No Transport\" );\n\t\t} else {\n\t\t\tjqXHR.readyState = 1;\n\n\t\t\t// Send global event\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( \"ajaxSend\", [ jqXHR, s ] );\n\t\t\t}\n\n\t\t\t// If request was aborted inside ajaxSend, stop there\n\t\t\tif ( completed ) {\n\t\t\t\treturn jqXHR;\n\t\t\t}\n\n\t\t\t// Timeout\n\t\t\tif ( s.async && s.timeout > 0 ) {\n\t\t\t\ttimeoutTimer = window.setTimeout( function() {\n\t\t\t\t\tjqXHR.abort( \"timeout\" );\n\t\t\t\t}, s.timeout );\n\t\t\t}\n\n\t\t\ttry {\n\t\t\t\tcompleted = false;\n\t\t\t\ttransport.send( requestHeaders, done );\n\t\t\t} catch ( e ) {\n\n\t\t\t\t// Rethrow post-completion exceptions\n\t\t\t\tif ( completed ) {\n\t\t\t\t\tthrow e;\n\t\t\t\t}\n\n\t\t\t\t// Propagate others as results\n\t\t\t\tdone( -1, e );\n\t\t\t}\n\t\t}\n\n\t\t// Callback for when everything is done\n\t\tfunction done( status, nativeStatusText, responses, headers ) {\n\t\t\tvar isSuccess, success, error, response, modified,\n\t\t\t\tstatusText = nativeStatusText;\n\n\t\t\t// Ignore repeat invocations\n\t\t\tif ( completed ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tcompleted = true;\n\n\t\t\t// Clear timeout if it exists\n\t\t\tif ( timeoutTimer ) {\n\t\t\t\twindow.clearTimeout( timeoutTimer );\n\t\t\t}\n\n\t\t\t// Dereference transport for early garbage collection\n\t\t\t// (no matter how long the jqXHR object will be used)\n\t\t\ttransport = undefined;\n\n\t\t\t// Cache response headers\n\t\t\tresponseHeadersString = headers || \"\";\n\n\t\t\t// Set readyState\n\t\t\tjqXHR.readyState = status > 0 ? 4 : 0;\n\n\t\t\t// Determine if successful\n\t\t\tisSuccess = status >= 200 && status < 300 || status === 304;\n\n\t\t\t// Get response data\n\t\t\tif ( responses ) {\n\t\t\t\tresponse = ajaxHandleResponses( s, jqXHR, responses );\n\t\t\t}\n\n\t\t\t// Convert no matter what (that way responseXXX fields are always set)\n\t\t\tresponse = ajaxConvert( s, response, jqXHR, isSuccess );\n\n\t\t\t// If successful, handle type chaining\n\t\t\tif ( isSuccess ) {\n\n\t\t\t\t// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.\n\t\t\t\tif ( s.ifModified ) {\n\t\t\t\t\tmodified = jqXHR.getResponseHeader( \"Last-Modified\" );\n\t\t\t\t\tif ( modified ) {\n\t\t\t\t\t\tjQuery.lastModified[ cacheURL ] = modified;\n\t\t\t\t\t}\n\t\t\t\t\tmodified = jqXHR.getResponseHeader( \"etag\" );\n\t\t\t\t\tif ( modified ) {\n\t\t\t\t\t\tjQuery.etag[ cacheURL ] = modified;\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// if no content\n\t\t\t\tif ( status === 204 || s.type === \"HEAD\" ) {\n\t\t\t\t\tstatusText = \"nocontent\";\n\n\t\t\t\t// if not modified\n\t\t\t\t} else if ( status === 304 ) {\n\t\t\t\t\tstatusText = \"notmodified\";\n\n\t\t\t\t// If we have data, let's convert it\n\t\t\t\t} else {\n\t\t\t\t\tstatusText = response.state;\n\t\t\t\t\tsuccess = response.data;\n\t\t\t\t\terror = response.error;\n\t\t\t\t\tisSuccess = !error;\n\t\t\t\t}\n\t\t\t} else {\n\n\t\t\t\t// Extract error from statusText and normalize for non-aborts\n\t\t\t\terror = statusText;\n\t\t\t\tif ( status || !statusText ) {\n\t\t\t\t\tstatusText = \"error\";\n\t\t\t\t\tif ( status < 0 ) {\n\t\t\t\t\t\tstatus = 0;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Set data for the fake xhr object\n\t\t\tjqXHR.status = status;\n\t\t\tjqXHR.statusText = ( nativeStatusText || statusText ) + \"\";\n\n\t\t\t// Success/Error\n\t\t\tif ( isSuccess ) {\n\t\t\t\tdeferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );\n\t\t\t} else {\n\t\t\t\tdeferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );\n\t\t\t}\n\n\t\t\t// Status-dependent callbacks\n\t\t\tjqXHR.statusCode( statusCode );\n\t\t\tstatusCode = undefined;\n\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( isSuccess ? \"ajaxSuccess\" : \"ajaxError\",\n\t\t\t\t\t[ jqXHR, s, isSuccess ? success : error ] );\n\t\t\t}\n\n\t\t\t// Complete\n\t\t\tcompleteDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );\n\n\t\t\tif ( fireGlobals ) {\n\t\t\t\tglobalEventContext.trigger( \"ajaxComplete\", [ jqXHR, s ] );\n\n\t\t\t\t// Handle the global AJAX counter\n\t\t\t\tif ( !( --jQuery.active ) ) {\n\t\t\t\t\tjQuery.event.trigger( \"ajaxStop\" );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn jqXHR;\n\t},\n\n\tgetJSON: function( url, data, callback ) {\n\t\treturn jQuery.get( url, data, callback, \"json\" );\n\t},\n\n\tgetScript: function( url, callback ) {\n\t\treturn jQuery.get( url, undefined, callback, \"script\" );\n\t}\n} );\n\njQuery.each( [ \"get\", \"post\" ], function( i, method ) {\n\tjQuery[ method ] = function( url, data, callback, type ) {\n\n\t\t// Shift arguments if data argument was omitted\n\t\tif ( isFunction( data ) ) {\n\t\t\ttype = type || callback;\n\t\t\tcallback = data;\n\t\t\tdata = undefined;\n\t\t}\n\n\t\t// The url can be an options object (which then must have .url)\n\t\treturn jQuery.ajax( jQuery.extend( {\n\t\t\turl: url,\n\t\t\ttype: method,\n\t\t\tdataType: type,\n\t\t\tdata: data,\n\t\t\tsuccess: callback\n\t\t}, jQuery.isPlainObject( url ) && url ) );\n\t};\n} );\n\n\njQuery._evalUrl = function( url, options ) {\n\treturn jQuery.ajax( {\n\t\turl: url,\n\n\t\t// Make this explicit, since user can override this through ajaxSetup (#11264)\n\t\ttype: \"GET\",\n\t\tdataType: \"script\",\n\t\tcache: true,\n\t\tasync: false,\n\t\tglobal: false,\n\n\t\t// Only evaluate the response if it is successful (gh-4126)\n\t\t// dataFilter is not invoked for failure responses, so using it instead\n\t\t// of the default converter is kludgy but it works.\n\t\tconverters: {\n\t\t\t\"text script\": function() {}\n\t\t},\n\t\tdataFilter: function( response ) {\n\t\t\tjQuery.globalEval( response, options );\n\t\t}\n\t} );\n};\n\n\njQuery.fn.extend( {\n\twrapAll: function( html ) {\n\t\tvar wrap;\n\n\t\tif ( this[ 0 ] ) {\n\t\t\tif ( isFunction( html ) ) {\n\t\t\t\thtml = html.call( this[ 0 ] );\n\t\t\t}\n\n\t\t\t// The elements to wrap the target around\n\t\t\twrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );\n\n\t\t\tif ( this[ 0 ].parentNode ) {\n\t\t\t\twrap.insertBefore( this[ 0 ] );\n\t\t\t}\n\n\t\t\twrap.map( function() {\n\t\t\t\tvar elem = this;\n\n\t\t\t\twhile ( elem.firstElementChild ) {\n\t\t\t\t\telem = elem.firstElementChild;\n\t\t\t\t}\n\n\t\t\t\treturn elem;\n\t\t\t} ).append( this );\n\t\t}\n\n\t\treturn this;\n\t},\n\n\twrapInner: function( html ) {\n\t\tif ( isFunction( html ) ) {\n\t\t\treturn this.each( function( i ) {\n\t\t\t\tjQuery( this ).wrapInner( html.call( this, i ) );\n\t\t\t} );\n\t\t}\n\n\t\treturn this.each( function() {\n\t\t\tvar self = jQuery( this ),\n\t\t\t\tcontents = self.contents();\n\n\t\t\tif ( contents.length ) {\n\t\t\t\tcontents.wrapAll( html );\n\n\t\t\t} else {\n\t\t\t\tself.append( html );\n\t\t\t}\n\t\t} );\n\t},\n\n\twrap: function( html ) {\n\t\tvar htmlIsFunction = isFunction( html );\n\n\t\treturn this.each( function( i ) {\n\t\t\tjQuery( this ).wrapAll( htmlIsFunction ? html.call( this, i ) : html );\n\t\t} );\n\t},\n\n\tunwrap: function( selector ) {\n\t\tthis.parent( selector ).not( \"body\" ).each( function() {\n\t\t\tjQuery( this ).replaceWith( this.childNodes );\n\t\t} );\n\t\treturn this;\n\t}\n} );\n\n\njQuery.expr.pseudos.hidden = function( elem ) {\n\treturn !jQuery.expr.pseudos.visible( elem );\n};\njQuery.expr.pseudos.visible = function( elem ) {\n\treturn !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );\n};\n\n\n\n\njQuery.ajaxSettings.xhr = function() {\n\ttry {\n\t\treturn new window.XMLHttpRequest();\n\t} catch ( e ) {}\n};\n\nvar xhrSuccessStatus = {\n\n\t\t// File protocol always yields status code 0, assume 200\n\t\t0: 200,\n\n\t\t// Support: IE <=9 only\n\t\t// #1450: sometimes IE returns 1223 when it should be 204\n\t\t1223: 204\n\t},\n\txhrSupported = jQuery.ajaxSettings.xhr();\n\nsupport.cors = !!xhrSupported && ( \"withCredentials\" in xhrSupported );\nsupport.ajax = xhrSupported = !!xhrSupported;\n\njQuery.ajaxTransport( function( options ) {\n\tvar callback, errorCallback;\n\n\t// Cross domain only allowed if supported through XMLHttpRequest\n\tif ( support.cors || xhrSupported && !options.crossDomain ) {\n\t\treturn {\n\t\t\tsend: function( headers, complete ) {\n\t\t\t\tvar i,\n\t\t\t\t\txhr = options.xhr();\n\n\t\t\t\txhr.open(\n\t\t\t\t\toptions.type,\n\t\t\t\t\toptions.url,\n\t\t\t\t\toptions.async,\n\t\t\t\t\toptions.username,\n\t\t\t\t\toptions.password\n\t\t\t\t);\n\n\t\t\t\t// Apply custom fields if provided\n\t\t\t\tif ( options.xhrFields ) {\n\t\t\t\t\tfor ( i in options.xhrFields ) {\n\t\t\t\t\t\txhr[ i ] = options.xhrFields[ i ];\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\t// Override mime type if needed\n\t\t\t\tif ( options.mimeType && xhr.overrideMimeType ) {\n\t\t\t\t\txhr.overrideMimeType( options.mimeType );\n\t\t\t\t}\n\n\t\t\t\t// X-Requested-With header\n\t\t\t\t// For cross-domain requests, seeing as conditions for a preflight are\n\t\t\t\t// akin to a jigsaw puzzle, we simply never set it to be sure.\n\t\t\t\t// (it can always be set on a per-request basis or even using ajaxSetup)\n\t\t\t\t// For same-domain requests, won't change header if already provided.\n\t\t\t\tif ( !options.crossDomain && !headers[ \"X-Requested-With\" ] ) {\n\t\t\t\t\theaders[ \"X-Requested-With\" ] = \"XMLHttpRequest\";\n\t\t\t\t}\n\n\t\t\t\t// Set headers\n\t\t\t\tfor ( i in headers ) {\n\t\t\t\t\txhr.setRequestHeader( i, headers[ i ] );\n\t\t\t\t}\n\n\t\t\t\t// Callback\n\t\t\t\tcallback = function( type ) {\n\t\t\t\t\treturn function() {\n\t\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\t\tcallback = errorCallback = xhr.onload =\n\t\t\t\t\t\t\t\txhr.onerror = xhr.onabort = xhr.ontimeout =\n\t\t\t\t\t\t\t\t\txhr.onreadystatechange = null;\n\n\t\t\t\t\t\t\tif ( type === \"abort\" ) {\n\t\t\t\t\t\t\t\txhr.abort();\n\t\t\t\t\t\t\t} else if ( type === \"error\" ) {\n\n\t\t\t\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t\t\t\t// On a manual native abort, IE9 throws\n\t\t\t\t\t\t\t\t// errors on any property access that is not readyState\n\t\t\t\t\t\t\t\tif ( typeof xhr.status !== \"number\" ) {\n\t\t\t\t\t\t\t\t\tcomplete( 0, \"error\" );\n\t\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\t\tcomplete(\n\n\t\t\t\t\t\t\t\t\t\t// File: protocol always yields status 0; see #8605, #14207\n\t\t\t\t\t\t\t\t\t\txhr.status,\n\t\t\t\t\t\t\t\t\t\txhr.statusText\n\t\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} else {\n\t\t\t\t\t\t\t\tcomplete(\n\t\t\t\t\t\t\t\t\txhrSuccessStatus[ xhr.status ] || xhr.status,\n\t\t\t\t\t\t\t\t\txhr.statusText,\n\n\t\t\t\t\t\t\t\t\t// Support: IE <=9 only\n\t\t\t\t\t\t\t\t\t// IE9 has no XHR2 but throws on binary (trac-11426)\n\t\t\t\t\t\t\t\t\t// For XHR2 non-text, let the caller handle it (gh-2498)\n\t\t\t\t\t\t\t\t\t( xhr.responseType || \"text\" ) !== \"text\" ||\n\t\t\t\t\t\t\t\t\ttypeof xhr.responseText !== \"string\" ?\n\t\t\t\t\t\t\t\t\t\t{ binary: xhr.response } :\n\t\t\t\t\t\t\t\t\t\t{ text: xhr.responseText },\n\t\t\t\t\t\t\t\t\txhr.getAllResponseHeaders()\n\t\t\t\t\t\t\t\t);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t};\n\t\t\t\t};\n\n\t\t\t\t// Listen to events\n\t\t\t\txhr.onload = callback();\n\t\t\t\terrorCallback = xhr.onerror = xhr.ontimeout = callback( \"error\" );\n\n\t\t\t\t// Support: IE 9 only\n\t\t\t\t// Use onreadystatechange to replace onabort\n\t\t\t\t// to handle uncaught aborts\n\t\t\t\tif ( xhr.onabort !== undefined ) {\n\t\t\t\t\txhr.onabort = errorCallback;\n\t\t\t\t} else {\n\t\t\t\t\txhr.onreadystatechange = function() {\n\n\t\t\t\t\t\t// Check readyState before timeout as it changes\n\t\t\t\t\t\tif ( xhr.readyState === 4 ) {\n\n\t\t\t\t\t\t\t// Allow onerror to be called first,\n\t\t\t\t\t\t\t// but that will not handle a native abort\n\t\t\t\t\t\t\t// Also, save errorCallback to a variable\n\t\t\t\t\t\t\t// as xhr.onerror cannot be accessed\n\t\t\t\t\t\t\twindow.setTimeout( function() {\n\t\t\t\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\t\t\t\terrorCallback();\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t} );\n\t\t\t\t\t\t}\n\t\t\t\t\t};\n\t\t\t\t}\n\n\t\t\t\t// Create the abort callback\n\t\t\t\tcallback = callback( \"abort\" );\n\n\t\t\t\ttry {\n\n\t\t\t\t\t// Do send the request (this may raise an exception)\n\t\t\t\t\txhr.send( options.hasContent && options.data || null );\n\t\t\t\t} catch ( e ) {\n\n\t\t\t\t\t// #14683: Only rethrow if this hasn't been notified as an error yet\n\t\t\t\t\tif ( callback ) {\n\t\t\t\t\t\tthrow e;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t},\n\n\t\t\tabort: function() {\n\t\t\t\tif ( callback ) {\n\t\t\t\t\tcallback();\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n} );\n\n\n\n\n// Prevent auto-execution of scripts when no explicit dataType was provided (See gh-2432)\njQuery.ajaxPrefilter( function( s ) {\n\tif ( s.crossDomain ) {\n\t\ts.contents.script = false;\n\t}\n} );\n\n// Install script dataType\njQuery.ajaxSetup( {\n\taccepts: {\n\t\tscript: \"text/javascript, application/javascript, \" +\n\t\t\t\"application/ecmascript, application/x-ecmascript\"\n\t},\n\tcontents: {\n\t\tscript: /\\b(?:java|ecma)script\\b/\n\t},\n\tconverters: {\n\t\t\"text script\": function( text ) {\n\t\t\tjQuery.globalEval( text );\n\t\t\treturn text;\n\t\t}\n\t}\n} );\n\n// Handle cache's special case and crossDomain\njQuery.ajaxPrefilter( \"script\", function( s ) {\n\tif ( s.cache === undefined ) {\n\t\ts.cache = false;\n\t}\n\tif ( s.crossDomain ) {\n\t\ts.type = \"GET\";\n\t}\n} );\n\n// Bind script tag hack transport\njQuery.ajaxTransport( \"script\", function( s ) {\n\n\t// This transport only deals with cross domain or forced-by-attrs requests\n\tif ( s.crossDomain || s.scriptAttrs ) {\n\t\tvar script, callback;\n\t\treturn {\n\t\t\tsend: function( _, complete ) {\n\t\t\t\tscript = jQuery( \"<script>\" )\n\t\t\t\t\t.attr( s.scriptAttrs || {} )\n\t\t\t\t\t.prop( { charset: s.scriptCharset, src: s.url } )\n\t\t\t\t\t.on( \"load error\", callback = function( evt ) {\n\t\t\t\t\t\tscript.remove();\n\t\t\t\t\t\tcallback = null;\n\t\t\t\t\t\tif ( evt ) {\n\t\t\t\t\t\t\tcomplete( evt.type === \"error\" ? 404 : 200, evt.type );\n\t\t\t\t\t\t}\n\t\t\t\t\t} );\n\n\t\t\t\t// Use native DOM manipulation to avoid our domManip AJAX trickery\n\t\t\t\tdocument.head.appendChild( script[ 0 ] );\n\t\t\t},\n\t\t\tabort: function() {\n\t\t\t\tif ( callback ) {\n\t\t\t\t\tcallback();\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t}\n} );\n\n\n\n\nvar oldCallbacks = [],\n\trjsonp = /(=)\\?(?=&|$)|\\?\\?/;\n\n// Default jsonp settings\njQuery.ajaxSetup( {\n\tjsonp: \"callback\",\n\tjsonpCallback: function() {\n\t\tvar callback = oldCallbacks.pop() || ( jQuery.expando + \"_\" + ( nonce++ ) );\n\t\tthis[ callback ] = true;\n\t\treturn callback;\n\t}\n} );\n\n// Detect, normalize options and install callbacks for jsonp requests\njQuery.ajaxPrefilter( \"json jsonp\", function( s, originalSettings, jqXHR ) {\n\n\tvar callbackName, overwritten, responseContainer,\n\t\tjsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?\n\t\t\t\"url\" :\n\t\t\ttypeof s.data === \"string\" &&\n\t\t\t\t( s.contentType || \"\" )\n\t\t\t\t\t.indexOf( \"application/x-www-form-urlencoded\" ) === 0 &&\n\t\t\t\trjsonp.test( s.data ) && \"data\"\n\t\t);\n\n\t// Handle iff the expected data type is \"jsonp\" or we have a parameter to set\n\tif ( jsonProp || s.dataTypes[ 0 ] === \"jsonp\" ) {\n\n\t\t// Get callback name, remembering preexisting value associated with it\n\t\tcallbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?\n\t\t\ts.jsonpCallback() :\n\t\t\ts.jsonpCallback;\n\n\t\t// Insert callback into url or form data\n\t\tif ( jsonProp ) {\n\t\t\ts[ jsonProp ] = s[ jsonProp ].replace( rjsonp, \"$1\" + callbackName );\n\t\t} else if ( s.jsonp !== false ) {\n\t\t\ts.url += ( rquery.test( s.url ) ? \"&\" : \"?\" ) + s.jsonp + \"=\" + callbackName;\n\t\t}\n\n\t\t// Use data converter to retrieve json after script execution\n\t\ts.converters[ \"script json\" ] = function() {\n\t\t\tif ( !responseContainer ) {\n\t\t\t\tjQuery.error( callbackName + \" was not called\" );\n\t\t\t}\n\t\t\treturn responseContainer[ 0 ];\n\t\t};\n\n\t\t// Force json dataType\n\t\ts.dataTypes[ 0 ] = \"json\";\n\n\t\t// Install callback\n\t\toverwritten = window[ callbackName ];\n\t\twindow[ callbackName ] = function() {\n\t\t\tresponseContainer = arguments;\n\t\t};\n\n\t\t// Clean-up function (fires after converters)\n\t\tjqXHR.always( function() {\n\n\t\t\t// If previous value didn't exist - remove it\n\t\t\tif ( overwritten === undefined ) {\n\t\t\t\tjQuery( window ).removeProp( callbackName );\n\n\t\t\t// Otherwise restore preexisting value\n\t\t\t} else {\n\t\t\t\twindow[ callbackName ] = overwritten;\n\t\t\t}\n\n\t\t\t// Save back as free\n\t\t\tif ( s[ callbackName ] ) {\n\n\t\t\t\t// Make sure that re-using the options doesn't screw things around\n\t\t\t\ts.jsonpCallback = originalSettings.jsonpCallback;\n\n\t\t\t\t// Save the callback name for future use\n\t\t\t\toldCallbacks.push( callbackName );\n\t\t\t}\n\n\t\t\t// Call if it was a function and we have a response\n\t\t\tif ( responseContainer && isFunction( overwritten ) ) {\n\t\t\t\toverwritten( responseContainer[ 0 ] );\n\t\t\t}\n\n\t\t\tresponseContainer = overwritten = undefined;\n\t\t} );\n\n\t\t// Delegate to script\n\t\treturn \"script\";\n\t}\n} );\n\n\n\n\n// Support: Safari 8 only\n// In Safari 8 documents created via document.implementation.createHTMLDocument\n// collapse sibling forms: the second one becomes a child of the first one.\n// Because of that, this security measure has to be disabled in Safari 8.\n// https://bugs.webkit.org/show_bug.cgi?id=137337\nsupport.createHTMLDocument = ( function() {\n\tvar body = document.implementation.createHTMLDocument( \"\" ).body;\n\tbody.innerHTML = \"<form></form><form></form>\";\n\treturn body.childNodes.length === 2;\n} )();\n\n\n// Argument \"data\" should be string of html\n// context (optional): If specified, the fragment will be created in this context,\n// defaults to document\n// keepScripts (optional): If true, will include scripts passed in the html string\njQuery.parseHTML = function( data, context, keepScripts ) {\n\tif ( typeof data !== \"string\" ) {\n\t\treturn [];\n\t}\n\tif ( typeof context === \"boolean\" ) {\n\t\tkeepScripts = context;\n\t\tcontext = false;\n\t}\n\n\tvar base, parsed, scripts;\n\n\tif ( !context ) {\n\n\t\t// Stop scripts or inline event handlers from being executed immediately\n\t\t// by using document.implementation\n\t\tif ( support.createHTMLDocument ) {\n\t\t\tcontext = document.implementation.createHTMLDocument( \"\" );\n\n\t\t\t// Set the base href for the created document\n\t\t\t// so any parsed elements with URLs\n\t\t\t// are based on the document's URL (gh-2965)\n\t\t\tbase = context.createElement( \"base\" );\n\t\t\tbase.href = document.location.href;\n\t\t\tcontext.head.appendChild( base );\n\t\t} else {\n\t\t\tcontext = document;\n\t\t}\n\t}\n\n\tparsed = rsingleTag.exec( data );\n\tscripts = !keepScripts && [];\n\n\t// Single tag\n\tif ( parsed ) {\n\t\treturn [ context.createElement( parsed[ 1 ] ) ];\n\t}\n\n\tparsed = buildFragment( [ data ], context, scripts );\n\n\tif ( scripts && scripts.length ) {\n\t\tjQuery( scripts ).remove();\n\t}\n\n\treturn jQuery.merge( [], parsed.childNodes );\n};\n\n\n/**\n * Load a url into a page\n */\njQuery.fn.load = function( url, params, callback ) {\n\tvar selector, type, response,\n\t\tself = this,\n\t\toff = url.indexOf( \" \" );\n\n\tif ( off > -1 ) {\n\t\tselector = stripAndCollapse( url.slice( off ) );\n\t\turl = url.slice( 0, off );\n\t}\n\n\t// If it's a function\n\tif ( isFunction( params ) ) {\n\n\t\t// We assume that it's the callback\n\t\tcallback = params;\n\t\tparams = undefined;\n\n\t// Otherwise, build a param string\n\t} else if ( params && typeof params === \"object\" ) {\n\t\ttype = \"POST\";\n\t}\n\n\t// If we have elements to modify, make the request\n\tif ( self.length > 0 ) {\n\t\tjQuery.ajax( {\n\t\t\turl: url,\n\n\t\t\t// If \"type\" variable is undefined, then \"GET\" method will be used.\n\t\t\t// Make value of this field explicit since\n\t\t\t// user can override it through ajaxSetup method\n\t\t\ttype: type || \"GET\",\n\t\t\tdataType: \"html\",\n\t\t\tdata: params\n\t\t} ).done( function( responseText ) {\n\n\t\t\t// Save response for use in complete callback\n\t\t\tresponse = arguments;\n\n\t\t\tself.html( selector ?\n\n\t\t\t\t// If a selector was specified, locate the right elements in a dummy div\n\t\t\t\t// Exclude scripts to avoid IE 'Permission Denied' errors\n\t\t\t\tjQuery( \"<div>\" ).append( jQuery.parseHTML( responseText ) ).find( selector ) :\n\n\t\t\t\t// Otherwise use the full result\n\t\t\t\tresponseText );\n\n\t\t// If the request succeeds, this function gets \"data\", \"status\", \"jqXHR\"\n\t\t// but they are ignored because response was set above.\n\t\t// If it fails, this function gets \"jqXHR\", \"status\", \"error\"\n\t\t} ).always( callback && function( jqXHR, status ) {\n\t\t\tself.each( function() {\n\t\t\t\tcallback.apply( this, response || [ jqXHR.responseText, status, jqXHR ] );\n\t\t\t} );\n\t\t} );\n\t}\n\n\treturn this;\n};\n\n\n\n\n// Attach a bunch of functions for handling common AJAX events\njQuery.each( [\n\t\"ajaxStart\",\n\t\"ajaxStop\",\n\t\"ajaxComplete\",\n\t\"ajaxError\",\n\t\"ajaxSuccess\",\n\t\"ajaxSend\"\n], function( i, type ) {\n\tjQuery.fn[ type ] = function( fn ) {\n\t\treturn this.on( type, fn );\n\t};\n} );\n\n\n\n\njQuery.expr.pseudos.animated = function( elem ) {\n\treturn jQuery.grep( jQuery.timers, function( fn ) {\n\t\treturn elem === fn.elem;\n\t} ).length;\n};\n\n\n\n\njQuery.offset = {\n\tsetOffset: function( elem, options, i ) {\n\t\tvar curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,\n\t\t\tposition = jQuery.css( elem, \"position\" ),\n\t\t\tcurElem = jQuery( elem ),\n\t\t\tprops = {};\n\n\t\t// Set position first, in-case top/left are set even on static elem\n\t\tif ( position === \"static\" ) {\n\t\t\telem.style.position = \"relative\";\n\t\t}\n\n\t\tcurOffset = curElem.offset();\n\t\tcurCSSTop = jQuery.css( elem, \"top\" );\n\t\tcurCSSLeft = jQuery.css( elem, \"left\" );\n\t\tcalculatePosition = ( position === \"absolute\" || position === \"fixed\" ) &&\n\t\t\t( curCSSTop + curCSSLeft ).indexOf( \"auto\" ) > -1;\n\n\t\t// Need to be able to calculate position if either\n\t\t// top or left is auto and position is either absolute or fixed\n\t\tif ( calculatePosition ) {\n\t\t\tcurPosition = curElem.position();\n\t\t\tcurTop = curPosition.top;\n\t\t\tcurLeft = curPosition.left;\n\n\t\t} else {\n\t\t\tcurTop = parseFloat( curCSSTop ) || 0;\n\t\t\tcurLeft = parseFloat( curCSSLeft ) || 0;\n\t\t}\n\n\t\tif ( isFunction( options ) ) {\n\n\t\t\t// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)\n\t\t\toptions = options.call( elem, i, jQuery.extend( {}, curOffset ) );\n\t\t}\n\n\t\tif ( options.top != null ) {\n\t\t\tprops.top = ( options.top - curOffset.top ) + curTop;\n\t\t}\n\t\tif ( options.left != null ) {\n\t\t\tprops.left = ( options.left - curOffset.left ) + curLeft;\n\t\t}\n\n\t\tif ( \"using\" in options ) {\n\t\t\toptions.using.call( elem, props );\n\n\t\t} else {\n\t\t\tcurElem.css( props );\n\t\t}\n\t}\n};\n\njQuery.fn.extend( {\n\n\t// offset() relates an element's border box to the document origin\n\toffset: function( options ) {\n\n\t\t// Preserve chaining for setter\n\t\tif ( arguments.length ) {\n\t\t\treturn options === undefined ?\n\t\t\t\tthis :\n\t\t\t\tthis.each( function( i ) {\n\t\t\t\t\tjQuery.offset.setOffset( this, options, i );\n\t\t\t\t} );\n\t\t}\n\n\t\tvar rect, win,\n\t\t\telem = this[ 0 ];\n\n\t\tif ( !elem ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Return zeros for disconnected and hidden (display: none) elements (gh-2310)\n\t\t// Support: IE <=11 only\n\t\t// Running getBoundingClientRect on a\n\t\t// disconnected node in IE throws an error\n\t\tif ( !elem.getClientRects().length ) {\n\t\t\treturn { top: 0, left: 0 };\n\t\t}\n\n\t\t// Get document-relative position by adding viewport scroll to viewport-relative gBCR\n\t\trect = elem.getBoundingClientRect();\n\t\twin = elem.ownerDocument.defaultView;\n\t\treturn {\n\t\t\ttop: rect.top + win.pageYOffset,\n\t\t\tleft: rect.left + win.pageXOffset\n\t\t};\n\t},\n\n\t// position() relates an element's margin box to its offset parent's padding box\n\t// This corresponds to the behavior of CSS absolute positioning\n\tposition: function() {\n\t\tif ( !this[ 0 ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tvar offsetParent, offset, doc,\n\t\t\telem = this[ 0 ],\n\t\t\tparentOffset = { top: 0, left: 0 };\n\n\t\t// position:fixed elements are offset from the viewport, which itself always has zero offset\n\t\tif ( jQuery.css( elem, \"position\" ) === \"fixed\" ) {\n\n\t\t\t// Assume position:fixed implies availability of getBoundingClientRect\n\t\t\toffset = elem.getBoundingClientRect();\n\n\t\t} else {\n\t\t\toffset = this.offset();\n\n\t\t\t// Account for the *real* offset parent, which can be the document or its root element\n\t\t\t// when a statically positioned element is identified\n\t\t\tdoc = elem.ownerDocument;\n\t\t\toffsetParent = elem.offsetParent || doc.documentElement;\n\t\t\twhile ( offsetParent &&\n\t\t\t\t( offsetParent === doc.body || offsetParent === doc.documentElement ) &&\n\t\t\t\tjQuery.css( offsetParent, \"position\" ) === \"static\" ) {\n\n\t\t\t\toffsetParent = offsetParent.parentNode;\n\t\t\t}\n\t\t\tif ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {\n\n\t\t\t\t// Incorporate borders into its offset, since they are outside its content origin\n\t\t\t\tparentOffset = jQuery( offsetParent ).offset();\n\t\t\t\tparentOffset.top += jQuery.css( offsetParent, \"borderTopWidth\", true );\n\t\t\t\tparentOffset.left += jQuery.css( offsetParent, \"borderLeftWidth\", true );\n\t\t\t}\n\t\t}\n\n\t\t// Subtract parent offsets and element margins\n\t\treturn {\n\t\t\ttop: offset.top - parentOffset.top - jQuery.css( elem, \"marginTop\", true ),\n\t\t\tleft: offset.left - parentOffset.left - jQuery.css( elem, \"marginLeft\", true )\n\t\t};\n\t},\n\n\t// This method will return documentElement in the following cases:\n\t// 1) For the element inside the iframe without offsetParent, this method will return\n\t// documentElement of the parent window\n\t// 2) For the hidden or detached element\n\t// 3) For body or html element, i.e. in case of the html node - it will return itself\n\t//\n\t// but those exceptions were never presented as a real life use-cases\n\t// and might be considered as more preferable results.\n\t//\n\t// This logic, however, is not guaranteed and can change at any point in the future\n\toffsetParent: function() {\n\t\treturn this.map( function() {\n\t\t\tvar offsetParent = this.offsetParent;\n\n\t\t\twhile ( offsetParent && jQuery.css( offsetParent, \"position\" ) === \"static\" ) {\n\t\t\t\toffsetParent = offsetParent.offsetParent;\n\t\t\t}\n\n\t\t\treturn offsetParent || documentElement;\n\t\t} );\n\t}\n} );\n\n// Create scrollLeft and scrollTop methods\njQuery.each( { scrollLeft: \"pageXOffset\", scrollTop: \"pageYOffset\" }, function( method, prop ) {\n\tvar top = \"pageYOffset\" === prop;\n\n\tjQuery.fn[ method ] = function( val ) {\n\t\treturn access( this, function( elem, method, val ) {\n\n\t\t\t// Coalesce documents and windows\n\t\t\tvar win;\n\t\t\tif ( isWindow( elem ) ) {\n\t\t\t\twin = elem;\n\t\t\t} else if ( elem.nodeType === 9 ) {\n\t\t\t\twin = elem.defaultView;\n\t\t\t}\n\n\t\t\tif ( val === undefined ) {\n\t\t\t\treturn win ? win[ prop ] : elem[ method ];\n\t\t\t}\n\n\t\t\tif ( win ) {\n\t\t\t\twin.scrollTo(\n\t\t\t\t\t!top ? val : win.pageXOffset,\n\t\t\t\t\ttop ? val : win.pageYOffset\n\t\t\t\t);\n\n\t\t\t} else {\n\t\t\t\telem[ method ] = val;\n\t\t\t}\n\t\t}, method, val, arguments.length );\n\t};\n} );\n\n// Support: Safari <=7 - 9.1, Chrome <=37 - 49\n// Add the top/left cssHooks using jQuery.fn.position\n// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084\n// Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347\n// getComputedStyle returns percent when specified for top/left/bottom/right;\n// rather than make the css module depend on the offset module, just check for it here\njQuery.each( [ \"top\", \"left\" ], function( i, prop ) {\n\tjQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,\n\t\tfunction( elem, computed ) {\n\t\t\tif ( computed ) {\n\t\t\t\tcomputed = curCSS( elem, prop );\n\n\t\t\t\t// If curCSS returns percentage, fallback to offset\n\t\t\t\treturn rnumnonpx.test( computed ) ?\n\t\t\t\t\tjQuery( elem ).position()[ prop ] + \"px\" :\n\t\t\t\t\tcomputed;\n\t\t\t}\n\t\t}\n\t);\n} );\n\n\n// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods\njQuery.each( { Height: \"height\", Width: \"width\" }, function( name, type ) {\n\tjQuery.each( { padding: \"inner\" + name, content: type, \"\": \"outer\" + name },\n\t\tfunction( defaultExtra, funcName ) {\n\n\t\t// Margin is only for outerHeight, outerWidth\n\t\tjQuery.fn[ funcName ] = function( margin, value ) {\n\t\t\tvar chainable = arguments.length && ( defaultExtra || typeof margin !== \"boolean\" ),\n\t\t\t\textra = defaultExtra || ( margin === true || value === true ? \"margin\" : \"border\" );\n\n\t\t\treturn access( this, function( elem, type, value ) {\n\t\t\t\tvar doc;\n\n\t\t\t\tif ( isWindow( elem ) ) {\n\n\t\t\t\t\t// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)\n\t\t\t\t\treturn funcName.indexOf( \"outer\" ) === 0 ?\n\t\t\t\t\t\telem[ \"inner\" + name ] :\n\t\t\t\t\t\telem.document.documentElement[ \"client\" + name ];\n\t\t\t\t}\n\n\t\t\t\t// Get document 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Date(m.currentYear,m.currentMonth,1);n.setMonth(m.currentMonth+t),e.appendChild(U(n.getFullYear(),n.getMonth()))}m.daysContainer.appendChild(e),m.days=m.daysContainer.firstChild,"range"===m.config.mode&&1===m.selectedDates.length&&ne()}}function q(){if(!(m.config.showMonths>1||"dropdown"!==m.config.monthSelectorType)){var e=function(e){return!(void 0!==m.config.minDate&&m.currentYear===m.config.minDate.getFullYear()&&e<m.config.minDate.getMonth())&&!(void 0!==m.config.maxDate&&m.currentYear===m.config.maxDate.getFullYear()&&e>m.config.maxDate.getMonth())};m.monthsDropdownContainer.tabIndex=-1,m.monthsDropdownContainer.innerHTML="";for(var t=0;t<12;t++)if(e(t)){var n=u("option","flatpickr-monthDropdown-month");n.value=new Date(m.currentYear,t).getMonth().toString(),n.textContent=h(t,m.config.shorthandCurrentMonth,m.l10n),n.tabIndex=-1,m.currentMonth===t&&(n.selected=!0),m.monthsDropdownContainer.appendChild(n)}}}function W(){var e,t=u("div","flatpickr-month"),n=window.document.createDocumentFragment();m.config.showMonths>1||"static"===m.config.monthSelectorType?e=u("span","cur-month"):(m.monthsDropdownContainer=u("select","flatpickr-monthDropdown-months"),O(m.monthsDropdownContainer,"change",(function(e){var t=e.target,n=parseInt(t.value,10);m.changeMonth(n-m.currentMonth),pe("onMonthChange")})),q(),e=m.monthsDropdownContainer);var r=f("cur-year",{tabindex:"-1"}),i=r.getElementsByTagName("input")[0];i.setAttribute("aria-label",m.l10n.yearAriaLabel),m.config.minDate&&i.setAttribute("min",m.config.minDate.getFullYear().toString()),m.config.maxDate&&(i.setAttribute("max",m.config.maxDate.getFullYear().toString()),i.disabled=!!m.config.minDate&&m.config.minDate.getFullYear()===m.config.maxDate.getFullYear());var o=u("div","flatpickr-current-month");return o.appendChild(e),o.appendChild(r),n.appendChild(o),t.appendChild(n),{container:t,yearElement:i,monthElement:e}}function Y(){c(m.monthNav),m.monthNav.appendChild(m.prevMonthNav),m.config.showMonths&&(m.yearElements=[],m.monthElements=[]);for(var e=m.config.showMonths;e--;){var t=W();m.yearElements.push(t.yearElement),m.monthElements.push(t.monthElement),m.monthNav.appendChild(t.container)}m.monthNav.appendChild(m.nextMonthNav)}function $(){m.weekdayContainer?c(m.weekdayContainer):m.weekdayContainer=u("div","flatpickr-weekdays");for(var e=m.config.showMonths;e--;){var t=u("div","flatpickr-weekdaycontainer");m.weekdayContainer.appendChild(t)}return G(),m.weekdayContainer}function G(){if(m.weekdayContainer){var e=m.l10n.firstDayOfWeek,t=m.l10n.weekdays.shorthand.slice();e>0&&e<t.length&&(t=t.splice(e,t.length).concat(t.splice(0,e)));for(var n=m.config.showMonths;n--;)m.weekdayContainer.children[n].innerHTML="\n <span class='flatpickr-weekday'>\n "+t.join("</span><span class='flatpickr-weekday'>")+"\n </span>\n "}}function Q(e,t){void 0===t&&(t=!0);var n=t?e:e-m.currentMonth;n<0&&!0===m._hidePrevMonthArrow||n>0&&!0===m._hideNextMonthArrow||(m.currentMonth+=n,(m.currentMonth<0||m.currentMonth>11)&&(m.currentYear+=m.currentMonth>11?1:-1,m.currentMonth=(m.currentMonth+12)%12,pe("onYearChange"),q()),H(),pe("onMonthChange"),ge())}function K(e){return!(!m.config.appendTo||!m.config.appendTo.contains(e))||m.calendarContainer.contains(e)}function J(e){if(m.isOpen&&!m.config.inline){var t="function"===typeof(a=e).composedPath?a.composedPath()[0]:a.target,n=K(t),r=t===m.input||t===m.altInput||m.element.contains(t)||e.path&&e.path.indexOf&&(~e.path.indexOf(m.input)||~e.path.indexOf(m.altInput)),i="blur"===e.type?r&&e.relatedTarget&&!K(e.relatedTarget):!r&&!n&&!K(e.relatedTarget),o=!m.config.ignoredFocusElements.some((function(e){return e.contains(t)}));i&&o&&(void 0!==m.timeContainer&&void 0!==m.minuteElement&&void 0!==m.hourElement&&S(),m.close(),"range"===m.config.mode&&1===m.selectedDates.length&&(m.clear(!1),m.redraw()))}var a}function X(e){if(!(!e||m.config.minDate&&e<m.config.minDate.getFullYear()||m.config.maxDate&&e>m.config.maxDate.getFullYear())){var t=e,n=m.currentYear!==t;m.currentYear=t||m.currentYear,m.config.maxDate&&m.currentYear===m.config.maxDate.getFullYear()?m.currentMonth=Math.min(m.config.maxDate.getMonth(),m.currentMonth):m.config.minDate&&m.currentYear===m.config.minDate.getFullYear()&&(m.currentMonth=Math.max(m.config.minDate.getMonth(),m.currentMonth)),n&&(m.redraw(),pe("onYearChange"),q())}}function Z(e,t){void 0===t&&(t=!0);var n=m.parseDate(e,void 0,t);if(m.config.minDate&&n&&b(n,m.config.minDate,void 0!==t?t:!m.minDateHasTime)<0||m.config.maxDate&&n&&b(n,m.config.maxDate,void 0!==t?t:!m.maxDateHasTime)>0)return!1;if(0===m.config.enable.length&&0===m.config.disable.length)return!0;if(void 0===n)return!1;for(var r=m.config.enable.length>0,i=r?m.config.enable:m.config.disable,o=0,a=void 0;o<i.length;o++){if("function"===typeof(a=i[o])&&a(n))return r;if(a instanceof Date&&void 0!==n&&a.getTime()===n.getTime())return r;if("string"===typeof a&&void 0!==n){var s=m.parseDate(a,void 0,!0);return s&&s.getTime()===n.getTime()?r:!r}if("object"===typeof a&&void 0!==n&&a.from&&a.to&&n.getTime()>=a.from.getTime()&&n.getTime()<=a.to.getTime())return r}return!r}function ee(e){return void 0!==m.daysContainer&&-1===e.className.indexOf("hidden")&&m.daysContainer.contains(e)}function te(e){var t=e.target===m._input,n=m.config.allowInput,r=m.isOpen&&(!n||!t),i=m.config.inline&&t&&!n;if(13===e.keyCode&&t){if(n)return m.setDate(m._input.value,!0,e.target===m.altInput?m.config.altFormat:m.config.dateFormat),e.target.blur();m.open()}else if(K(e.target)||r||i){var o=!!m.timeContainer&&m.timeContainer.contains(e.target);switch(e.keyCode){case 13:o?(e.preventDefault(),S(),ue()):ce(e);break;case 27:e.preventDefault(),ue();break;case 8:case 46:t&&!m.config.allowInput&&(e.preventDefault(),m.clear());break;case 37:case 39:if(o||t)m.hourElement&&m.hourElement.focus();else if(e.preventDefault(),void 0!==m.daysContainer&&(!1===n||document.activeElement&&ee(document.activeElement))){var a=39===e.keyCode?1:-1;e.ctrlKey?(e.stopPropagation(),Q(a),B(V(1),0)):B(void 0,a)}break;case 38:case 40:e.preventDefault();var s=40===e.keyCode?1:-1;m.daysContainer&&void 0!==e.target.$i||e.target===m.input||e.target===m.altInput?e.ctrlKey?(e.stopPropagation(),X(m.currentYear-s),B(V(1),0)):o||B(void 0,7*s):e.target===m.currentYearElement?X(m.currentYear-s):m.config.enableTime&&(!o&&m.hourElement&&m.hourElement.focus(),S(e),m._debouncedChange());break;case 9:if(o){var l=[m.hourElement,m.minuteElement,m.secondElement,m.amPM].concat(m.pluginElements).filter((function(e){return e})),u=l.indexOf(e.target);if(-1!==u){var c=l[u+(e.shiftKey?-1:1)];e.preventDefault(),(c||m._input).focus()}}else!m.config.noCalendar&&m.daysContainer&&m.daysContainer.contains(e.target)&&e.shiftKey&&(e.preventDefault(),m._input.focus())}}if(void 0!==m.amPM&&e.target===m.amPM)switch(e.key){case m.l10n.amPM[0].charAt(0):case m.l10n.amPM[0].charAt(0).toLowerCase():m.amPM.textContent=m.l10n.amPM[0],E(),be();break;case m.l10n.amPM[1].charAt(0):case m.l10n.amPM[1].charAt(0).toLowerCase():m.amPM.textContent=m.l10n.amPM[1],E(),be()}(t||K(e.target))&&pe("onKeyDown",e)}function ne(e){if(1===m.selectedDates.length&&(!e||e.classList.contains("flatpickr-day")&&!e.classList.contains("flatpickr-disabled"))){for(var t=e?e.dateObj.getTime():m.days.firstElementChild.dateObj.getTime(),n=m.parseDate(m.selectedDates[0],void 0,!0).getTime(),r=Math.min(t,m.selectedDates[0].getTime()),i=Math.max(t,m.selectedDates[0].getTime()),o=!1,a=0,s=0,l=r;l<i;l+=w.DAY)Z(new Date(l),!0)||(o=o||l>r&&l<i,l<n&&(!a||l>a)?a=l:l>n&&(!s||l<s)&&(s=l));for(var u=0;u<m.config.showMonths;u++)for(var c=m.daysContainer.children[u],f=function(r,i){var l=c.children[r],u=l.dateObj.getTime(),f=a>0&&u<a||s>0&&u>s;return f?(l.classList.add("notAllowed"),["inRange","startRange","endRange"].forEach((function(e){l.classList.remove(e)})),"continue"):o&&!f?"continue":(["startRange","inRange","endRange","notAllowed"].forEach((function(e){l.classList.remove(e)})),void(void 0!==e&&(e.classList.add(t<=m.selectedDates[0].getTime()?"startRange":"endRange"),n<t&&u===n?l.classList.add("startRange"):n>t&&u===n&&l.classList.add("endRange"),u>=a&&(0===s||u<=s)&&k(u,n,t)&&l.classList.add("inRange"))))},d=0,h=c.children.length;d<h;d++)f(d)}}function re(){!m.isOpen||m.config.static||m.config.inline||se()}function ie(){m.setDate(void 0!==m.config.minDate?new Date(m.config.minDate.getTime()):new Date,!0),P(),be()}function oe(e){return function(t){var n=m.config["_"+e+"Date"]=m.parseDate(t,m.config.dateFormat),r=m.config["_"+("min"===e?"max":"min")+"Date"];void 0!==n&&(m["min"===e?"minDateHasTime":"maxDateHasTime"]=n.getHours()>0||n.getMinutes()>0||n.getSeconds()>0),m.selectedDates&&(m.selectedDates=m.selectedDates.filter((function(e){return Z(e)})),m.selectedDates.length||"min"!==e||A(n),be()),m.daysContainer&&(le(),void 0!==n?m.currentYearElement[e]=n.getFullYear().toString():m.currentYearElement.removeAttribute(e),m.currentYearElement.disabled=!!r&&void 0!==n&&r.getFullYear()===n.getFullYear())}}function ae(){"object"!==typeof m.config.locale&&"undefined"===typeof C.l10ns[m.config.locale]&&m.config.errorHandler(new Error("flatpickr: invalid locale "+m.config.locale)),m.l10n=e({},C.l10ns.default,"object"===typeof m.config.locale?m.config.locale:"default"!==m.config.locale?C.l10ns[m.config.locale]:void 0),v.K="("+m.l10n.amPM[0]+"|"+m.l10n.amPM[1]+"|"+m.l10n.amPM[0].toLowerCase()+"|"+m.l10n.amPM[1].toLowerCase()+")",void 0===e({},p,JSON.parse(JSON.stringify(d.dataset||{}))).time_24hr&&void 0===C.defaultConfig.time_24hr&&(m.config.time_24hr=m.l10n.time_24hr),m.formatDate=g(m),m.parseDate=y({config:m.config,l10n:m.l10n})}function se(e){if(void 0!==m.calendarContainer){pe("onPreCalendarPosition");var t=e||m._positionElement,n=Array.prototype.reduce.call(m.calendarContainer.children,(function(e,t){return e+t.offsetHeight}),0),r=m.calendarContainer.offsetWidth,i=m.config.position.split(" "),o=i[0],a=i.length>1?i[1]:null,s=t.getBoundingClientRect(),u=window.innerHeight-s.bottom,c="above"===o||"below"!==o&&u<n&&s.top>n,f=window.pageYOffset+s.top+(c?-n-2:t.offsetHeight+2);if(l(m.calendarContainer,"arrowTop",!c),l(m.calendarContainer,"arrowBottom",c),!m.config.inline){var d=window.pageXOffset+s.left-(null!=a&&"center"===a?(r-s.width)/2:0),h=window.document.body.offsetWidth-(window.pageXOffset+s.right),p=d+r>window.document.body.offsetWidth,v=h+r>window.document.body.offsetWidth;if(l(m.calendarContainer,"rightMost",p),!m.config.static)if(m.calendarContainer.style.top=f+"px",p)if(v){var g=document.styleSheets[0];if(void 0===g)return;var y=window.document.body.offsetWidth,b=Math.max(0,y/2-r/2),k=g.cssRules.length,w="{left:"+s.left+"px;right:auto;}";l(m.calendarContainer,"rightMost",!1),l(m.calendarContainer,"centerMost",!0),g.insertRule(".flatpickr-calendar.centerMost:before,.flatpickr-calendar.centerMost:after"+w,k),m.calendarContainer.style.left=b+"px",m.calendarContainer.style.right="auto"}else m.calendarContainer.style.left="auto",m.calendarContainer.style.right=h+"px";else m.calendarContainer.style.left=d+"px",m.calendarContainer.style.right="auto"}}}function le(){m.config.noCalendar||m.isMobile||(ge(),H())}function ue(){m._input.focus(),-1!==window.navigator.userAgent.indexOf("MSIE")||void 0!==navigator.msMaxTouchPoints?setTimeout(m.close,0):m.close()}function ce(e){e.preventDefault(),e.stopPropagation();var t=function e(t,n){return n(t)?t:t.parentNode?e(t.parentNode,n):void 0}(e.target,(function(e){return e.classList&&e.classList.contains("flatpickr-day")&&!e.classList.contains("flatpickr-disabled")&&!e.classList.contains("notAllowed")}));if(void 0!==t){var n=t,r=m.latestSelectedDateObj=new Date(n.dateObj.getTime()),i=(r.getMonth()<m.currentMonth||r.getMonth()>m.currentMonth+m.config.showMonths-1)&&"range"!==m.config.mode;if(m.selectedDateElem=n,"single"===m.config.mode)m.selectedDates=[r];else if("multiple"===m.config.mode){var o=me(r);o?m.selectedDates.splice(parseInt(o),1):m.selectedDates.push(r)}else"range"===m.config.mode&&(2===m.selectedDates.length&&m.clear(!1,!1),m.latestSelectedDateObj=r,m.selectedDates.push(r),0!==b(r,m.selectedDates[0],!0)&&m.selectedDates.sort((function(e,t){return e.getTime()-t.getTime()})));if(E(),i){var a=m.currentYear!==r.getFullYear();m.currentYear=r.getFullYear(),m.currentMonth=r.getMonth(),a&&(pe("onYearChange"),q()),pe("onMonthChange")}if(ge(),H(),be(),m.config.enableTime&&setTimeout((function(){return m.showTimeInput=!0}),50),i||"range"===m.config.mode||1!==m.config.showMonths?void 0!==m.selectedDateElem&&void 0===m.hourElement&&m.selectedDateElem&&m.selectedDateElem.focus():z(n),void 0!==m.hourElement&&void 0!==m.hourElement&&m.hourElement.focus(),m.config.closeOnSelect){var s="single"===m.config.mode&&!m.config.enableTime,l="range"===m.config.mode&&2===m.selectedDates.length&&!m.config.enableTime;(s||l)&&ue()}D()}}m.parseDate=y({config:m.config,l10n:m.l10n}),m._handlers=[],m.pluginElements=[],m.loadedPlugins=[],m._bind=O,m._setHoursFromDate=A,m._positionCalendar=se,m.changeMonth=Q,m.changeYear=X,m.clear=function(e,t){void 0===e&&(e=!0),void 0===t&&(t=!0),m.input.value="",void 0!==m.altInput&&(m.altInput.value=""),void 0!==m.mobileInput&&(m.mobileInput.value=""),m.selectedDates=[],m.latestSelectedDateObj=void 0,!0===t&&(m.currentYear=m._initialDate.getFullYear(),m.currentMonth=m._initialDate.getMonth()),m.showTimeInput=!1,!0===m.config.enableTime&&P(),m.redraw(),e&&pe("onChange")},m.close=function(){m.isOpen=!1,m.isMobile||(void 0!==m.calendarContainer&&m.calendarContainer.classList.remove("open"),void 0!==m._input&&m._input.classList.remove("active")),pe("onClose")},m._createElement=u,m.destroy=function(){void 0!==m.config&&pe("onDestroy");for(var e=m._handlers.length;e--;){var t=m._handlers[e];t.element.removeEventListener(t.event,t.handler,t.options)}if(m._handlers=[],m.mobileInput)m.mobileInput.parentNode&&m.mobileInput.parentNode.removeChild(m.mobileInput),m.mobileInput=void 0;else if(m.calendarContainer&&m.calendarContainer.parentNode)if(m.config.static&&m.calendarContainer.parentNode){var n=m.calendarContainer.parentNode;if(n.lastChild&&n.removeChild(n.lastChild),n.parentNode){for(;n.firstChild;)n.parentNode.insertBefore(n.firstChild,n);n.parentNode.removeChild(n)}}else m.calendarContainer.parentNode.removeChild(m.calendarContainer);m.altInput&&(m.input.type="text",m.altInput.parentNode&&m.altInput.parentNode.removeChild(m.altInput),delete 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n=m.isOpen;m.isOpen=!0,n||(m.calendarContainer.classList.add("open"),m._input.classList.add("active"),pe("onOpen"),se(t)),!0===m.config.enableTime&&!0===m.config.noCalendar&&(0===m.selectedDates.length&&ie(),!1!==m.config.allowInput||void 0!==e&&m.timeContainer.contains(e.relatedTarget)||setTimeout((function(){return m.hourElement.select()}),50))}},m.redraw=le,m.set=function(e,n){if(null!==e&&"object"===typeof e)for(var r in Object.assign(m.config,e),e)void 0!==fe[r]&&fe[r].forEach((function(e){return e()}));else m.config[e]=n,void 0!==fe[e]?fe[e].forEach((function(e){return e()})):t.indexOf(e)>-1&&(m.config[e]=s(n));m.redraw(),be(!1)},m.setDate=function(e,t,n){if(void 0===t&&(t=!1),void 0===n&&(n=m.config.dateFormat),0!==e&&!e||e instanceof Array&&0===e.length)return 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top;border-top:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);border-right:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);animation-name:ck-upload-complete-icon-check;animation-duration:.5s;animation-delay:.5s;animation-fill-mode:forwards;box-sizing:border-box}@keyframes ck-upload-complete-icon-show{0%{opacity:0}to{opacity:1}}@keyframes ck-upload-complete-icon-hide{0%{opacity:1}to{opacity:0}}@keyframes ck-upload-complete-icon-check{0%{opacity:1;width:0;height:0}33%{width:.3em;height:0}to{opacity:1;width:.3em;height:.45em}}'},function(e,t,n){var r=n(68);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports='.ck .ck-upload-placeholder-loader{position:absolute;display:flex;align-items:center;justify-content:center;top:0;left:0}.ck 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.ck-list__item{min-width:18em}"},function(e,t,n){var r=n(71);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports=".ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:#333;background-color:#f7f7f7;padding:.6em;font-size:.75em;outline-offset:-1px}"},function(e,t,n){var r=n(73);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports=":root{--ck-image-style-spacing:1.5em}.ck-content .image-style-align-center,.ck-content .image-style-align-left,.ck-content .image-style-align-right,.ck-content .image-style-side{max-width:50%}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing)}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content .image-style-align-right{float:right;margin-left:var(--ck-image-style-spacing)}"},function(e,t,n){var r=n(75);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports=".ck.ck-link-form{display:flex}.ck.ck-link-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-link-form{flex-wrap:wrap}.ck.ck-link-form .ck-labeled-input{flex-basis:100%}.ck.ck-link-form .ck-button{flex-basis:50%}}.ck.ck-link-form_layout-vertical{display:block}.ck.ck-link-form{padding:var(--ck-spacing-standard)}.ck.ck-link-form:focus{outline:none}[dir=ltr] .ck.ck-link-form>:not(:first-child),[dir=rtl] .ck.ck-link-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}.ck.ck-link-form_layout-vertical{padding:0;min-width:var(--ck-input-text-width)}.ck.ck-link-form_layout-vertical .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) var(--ck-spacing-small)}.ck.ck-link-form_layout-vertical .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form_layout-vertical .ck-button{padding:var(--ck-spacing-standard);margin:0;border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border);width:50%}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}.ck.ck-link-form_layout-vertical .ck.ck-list{margin-left:0}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton{border:0;width:100%}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton:hover{background:none}"},function(e,t,n){var r=n(77);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports=".ck.ck-link-actions{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-link-actions .ck-link-actions__preview{display:inline-block}.ck.ck-link-actions .ck-link-actions__preview .ck-button__label{overflow:hidden}@media screen and (max-width:600px){.ck.ck-link-actions{flex-wrap:wrap}.ck.ck-link-actions .ck-link-actions__preview{flex-basis:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){flex-basis:50%}}.ck.ck-link-actions{padding:var(--ck-spacing-standard)}.ck.ck-link-actions .ck-button.ck-link-actions__preview{padding-left:0;padding-right:0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{padding:0 var(--ck-spacing-medium);color:var(--ck-color-link-default);text-overflow:ellipsis;cursor:pointer;max-width:var(--ck-input-text-width);min-width:3em;text-align:center}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label:hover{text-decoration:underline}.ck.ck-link-actions .ck-button.ck-link-actions__preview,.ck.ck-link-actions .ck-button.ck-link-actions__preview:active,.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus,.ck.ck-link-actions .ck-button.ck-link-actions__preview:hover{background:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:active{box-shadow:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus .ck-button__label{text-decoration:underline}.ck.ck-link-actions:focus{outline:none}[dir=ltr] .ck.ck-link-actions .ck-button:not(:first-child),[dir=rtl] .ck.ck-link-actions .ck-button:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-actions{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-actions .ck-button.ck-link-actions__preview{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{min-width:0;max-width:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):last-of-type{border-right:1px solid var(--ck-color-base-border)}}"},function(e,t,n){var r=n(79);"string"==typeof r&&(r=[[e.i,r,""]]),n(1)(r,{injectType:"singletonStyleTag",insert:"head",singleton:!0}),r.locals&&(e.exports=r.locals)},function(e,t){e.exports='.ck-media__wrapper 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*{display:none}.ck-editor__editable:not(.ck-read-only) .ck-media__wrapper>:not(.ck-media__placeholder),.ck-editor__editable:not(.ck-read-only) .ck-widget:not(.ck-widget_selected) .ck-media__placeholder{pointer-events:none}:root{--ck-media-embed-placeholder-icon-size:3em;--ck-color-media-embed-placeholder-url-text:#757575;--ck-color-media-embed-placeholder-url-text-hover:var(--ck-color-base-text)}.ck-media__wrapper{margin:0 auto}.ck-media__wrapper .ck-media__placeholder{padding:calc(3*var(--ck-spacing-standard));background:var(--ck-color-base-foreground)}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon{min-width:var(--ck-media-embed-placeholder-icon-size);height:var(--ck-media-embed-placeholder-icon-size);margin-bottom:var(--ck-spacing-large);background-position:50%;background-size:cover}.ck-media__wrapper .ck-media__placeholder .ck-media__placeholder__icon .ck-icon{width:100%;height:100%}.ck-media__wrapper .ck-media__placeholder 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n=0,r=Object.keys(e);n<r.length;n++){var i=r[n];this._styles.set(i,e[i])}else this._styles.set(e,t)}},{key:"_removeStyle",value:function(e){var t=this;this._fireChange("attributes",this),(e=Array.isArray(e)?e:[e]).forEach((function(e){return t._styles.delete(e)}))}},{key:"_setCustomProperty",value:function(e,t){this._customProperties.set(e,t)}},{key:"_removeCustomProperty",value:function(e){return this._customProperties.delete(e)}},{key:"childCount",get:function(){return this._children.length}},{key:"isEmpty",get:function(){return 0===this._children.length}}]),t}(Qt);function rn(e,t){var n=null,r=0,i=0,o=null;if(e.clear(),""!==t){";"!=t.charAt(t.length-1)&&(t+=";");for(var a=0;a<t.length;a++){var s=t.charAt(a);if(null===n)switch(s){case":":o||(o=t.substr(r,a-r),i=a+1);break;case'"':case"'":n=s;break;case";":var l=t.substr(i,a-i);o&&e.set(o.trim(),l.trim()),o=null,r=a+1}else s===n&&(n=null)}}}function on(e,t){var n=t.split(/\s+/);e.clear(),n.forEach((function(t){return e.add(t)}))}var 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e.apply(t,n)},cn=Math.max,fn=function(e){return function(){return e}},dn=he?function(e,t){return he(e,"toString",{configurable:!0,enumerable:!1,value:fn(t),writable:!0})}:ln,hn=Date.now,pn=function(e){var t=0,n=0;return function(){var r=hn(),i=16-(r-n);if(n=r,i>0){if(++t>=800)return arguments[0]}else t=0;return e.apply(void 0,arguments)}}(dn),vn=function(e,t){return pn(function(e,t,n){return t=cn(void 0===t?e.length-1:t,0),function(){for(var r=arguments,i=-1,o=cn(r.length-t,0),a=Array(o);++i<o;)a[i]=r[t+i];i=-1;for(var s=Array(t+1);++i<t;)s[i]=r[i];return s[t]=n(a),un(e,this,s)}}(e,t,ln),e+"")},mn=function(e){return vn((function(t,n){var r=-1,i=n.length,o=i>1?n[i-1]:void 0,a=i>2?n[2]:void 0;for(o=e.length>3&&"function"==typeof o?(i--,o):void 0,a&&function(e,t,n){if(!U(n))return!1;var r=typeof t;return!!("number"==r?ze(n)&&Se(t,n.length):"string"==r&&t in n)&&L(n[t],e)}(n[0],n[1],a)&&(o=i<3?void 0:o,i=1),t=Object(t);++r<i;){var s=n[r];s&&e(t,s)}return 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i=this[bn];n.forEach((function(t){if(i.has(t))throw new It.b("observable-bind-rebind: Cannot bind the same property more than once.",e)}));var o=new Map;return n.forEach((function(e){var t={property:e,to:[]};i.set(e,t),o.set(e,t)})),{to:xn,toMany:Tn,_observable:this,_bindProperties:n,_to:[],_bindings:o}},unbind:function(){var e=this;if(gn in this){for(var t=this[bn],n=this[yn],r=arguments.length,i=new Array(r),o=0;o<r;o++)i[o]=arguments[o];if(i.length){if(!Cn(i))throw new It.b("observable-unbind-wrong-properties: Properties must be strings.",this);i.forEach((function(r){var i,o,a,s,l=t.get(r);l&&(l.to.forEach((function(t){i=t[0],o=t[1],a=n.get(i),(s=a[o]).delete(l),s.size||delete a[o],Object.keys(a).length||(n.delete(i),e.stopListening(i,"change"))})),t.delete(r))}))}else n.forEach((function(t,n){e.stopListening(n,"change")})),n.clear(),t.clear()}},decorate:function(e){var t=this,n=this[e];if(!n)throw new It.b("observablemixin-cannot-decorate-undefined: Cannot decorate an undefined 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t;e._bindings.forEach((function(n,r){e._to.forEach((function(i){t=i.properties[n.callback?0:e._bindProperties.indexOf(r)],n.to.push([i.observable,t]),function(e,t,n,r){var i=e[yn],o=i.get(n),a=o||{};a[r]||(a[r]=new Set),a[r].add(t),o||i.set(n,a)}(e._observable,n,i.observable,t)}))}))}(this),this._bindProperties.forEach((function(e){Sn(t._observable,e)}))}function Tn(e,t,n){if(this._bindings.size>1)throw new It.b("observable-bind-to-many-not-one-binding: Cannot bind multiple properties with toMany().",this);this.to.apply(this,u(function(e,t){var n=e.map((function(e){return[e,t]}));return Array.prototype.concat.apply([],n)}(e,t)).concat([n]))}function Cn(e){return e.every((function(e){return"string"==typeof e}))}function Sn(e,t){var n,r=e[bn].get(t);n=r.callback?r.callback.apply(e,r.to.map((function(e){return e[0][e[1]]}))):(n=r.to[0])[0][n[1]],e.hasOwnProperty(t)?e[t]=n:e.set(t,n)}var En=Symbol("document"),An=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,e,n,r))).set("isReadOnly",!1),i.set("isFocused",!1),i}return v(t,e),d(t,[{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e&&e.replace(/^view:/,"");return n?"editableElement"==r&&n==this.name||l(p(t.prototype),"is",this).call(this,e,n):"editableElement"==r||l(p(t.prototype),"is",this).call(this,e)}},{key:"destroy",value:function(){this.stopListening()}},{key:"document",get:function(){return this.getCustomProperty(En)}},{key:"_document",set:function(e){var t=this;if(this.getCustomProperty(En))throw new It.b("view-editableelement-document-already-set: View document is already set.",this);this._setCustomProperty(En,e),this.bind("isReadOnly").to(e),this.bind("isFocused").to(e,"isFocused",(function(n){return n&&e.selection.editableElement==t})),this.listenTo(e.selection,"change",(function(){t.isFocused=e.isFocused&&e.selection.editableElement==t}))}}]),t}(an);Yt(An,wn);var Pn=Symbol("rootName"),Mn=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).rootName="main",n}return v(t,e),d(t,[{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e.replace(/^view:/,"");return n?"rootElement"==r&&n==this.name||l(p(t.prototype),"is",this).call(this,e,n):"rootElement"==r||l(p(t.prototype),"is",this).call(this,e)}},{key:"rootName",get:function(){return this.getCustomProperty(Pn)},set:function(e){this._setCustomProperty(Pn,e)}},{key:"_name",set:function(e){this.name=e}}]),t}(An),Nn=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(f(this,e),!t.boundaries&&!t.startPosition)throw new It.b("view-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.",null);if(t.direction&&"forward"!=t.direction&&"backward"!=t.direction)throw new It.b("view-tree-walker-unknown-direction: Only `backward` and `forward` direction 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e,t=this.position.clone(),n=this.position,r=t.parent;if(null===r.parent&&t.offset===r.childCount)return{done:!0};if(r===this._boundaryEndParent&&t.offset==this.boundaries.end.offset)return{done:!0};if(r instanceof Kt){if(t.isAtEnd)return this.position=On._createAfter(r),this._next();e=r.data[t.offset]}else e=r.getChild(t.offset);if(e instanceof nn)return this.shallow?t.offset++:t=new On(e,0),this.position=t,this._formatReturnValue("elementStart",e,n,t,1);if(e instanceof Kt){if(this.singleCharacters)return t=new On(e,0),this.position=t,this._next();var i,o=e.data.length;return e==this._boundaryEndParent?(o=this.boundaries.end.offset,i=new Jt(e,0,o),t=On._createAfter(i)):(i=new Jt(e,0,e.data.length),t.offset++),this.position=t,this._formatReturnValue("text",i,n,t,o)}if("string"==typeof e){var a;a=this.singleCharacters?1:(r===this._boundaryEndParent?this.boundaries.end.offset:r.data.length)-t.offset;var s=new Jt(r,t.offset,a);return t.offset+=a,this.position=t,this._formatReturnValue("text",s,n,t,a)}return t=On._createAfter(r),this.position=t,this.ignoreElementEnd?this._next():this._formatReturnValue("elementEnd",r,n,t)}},{key:"_previous",value:function(){var e,t=this.position.clone(),n=this.position,r=t.parent;if(null===r.parent&&0===t.offset)return{done:!0};if(r==this._boundaryStartParent&&t.offset==this.boundaries.start.offset)return{done:!0};if(r instanceof Kt){if(t.isAtStart)return this.position=On._createBefore(r),this._previous();e=r.data[t.offset-1]}else e=r.getChild(t.offset-1);if(e instanceof nn)return this.shallow?(t.offset--,this.position=t,this._formatReturnValue("elementStart",e,n,t,1)):(t=new On(e,e.childCount),this.position=t,this.ignoreElementEnd?this._previous():this._formatReturnValue("elementEnd",e,n,t));if(e instanceof Kt){if(this.singleCharacters)return t=new On(e,e.data.length),this.position=t,this._previous();var i,o=e.data.length;if(e==this._boundaryStartParent){var a=this.boundaries.start.offset;o=(i=new Jt(e,a,e.data.length-a)).data.length,t=On._createBefore(i)}else i=new Jt(e,0,e.data.length),t.offset--;return this.position=t,this._formatReturnValue("text",i,n,t,o)}if("string"==typeof e){var s;if(this.singleCharacters)s=1;else{var l=r===this._boundaryStartParent?this.boundaries.start.offset:0;s=t.offset-l}t.offset-=s;var u=new Jt(r,t.offset,s);return this.position=t,this._formatReturnValue("text",u,n,t,s)}return t=On._createBefore(r),this.position=t,this._formatReturnValue("elementStart",r,n,t,1)}},{key:"_formatReturnValue",value:function(e,t,n,r,i){return t instanceof Jt&&(t.offsetInText+t.data.length==t.textNode.data.length&&("forward"!=this.direction||this.boundaries&&this.boundaries.end.isEqual(this.position)?n=On._createAfter(t.textNode):(r=On._createAfter(t.textNode),this.position=r)),0===t.offsetInText&&("backward"!=this.direction||this.boundaries&&this.boundaries.start.isEqual(this.position)?n=On._createBefore(t.textNode):(r=On._createBefore(t.textNode),this.position=r))),{done:!1,value:{type:e,item:t,previousPosition:n,nextPosition:r,length:i}}}}]),e}(),On=function(){function e(t,n){f(this,e),this.parent=t,this.offset=n}return d(e,[{key:"getShiftedBy",value:function(t){var n=e._createAt(this),r=n.offset+t;return n.offset=r<0?0:r,n}},{key:"getLastMatchingPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t.startPosition=this;var n=new Nn(t);return n.skip(e),n.position}},{key:"getAncestors",value:function(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}},{key:"getCommonAncestor",value:function(e){for(var t=this.getAncestors(),n=e.getAncestors(),r=0;t[r]==n[r]&&t[r];)r++;return 0===r?null:t[r-1]}},{key:"is",value:function(e){return"position"==e||"view:position"==e}},{key:"isEqual",value:function(e){return this.parent==e.parent&&this.offset==e.offset}},{key:"isBefore",value:function(e){return"before"==this.compareWith(e)}},{key:"isAfter",value:function(e){return"after"==this.compareWith(e)}},{key:"compareWith",value:function(e){if(this.root!==e.root)return"different";if(this.isEqual(e))return"same";var t=this.parent.is("node")?this.parent.getPath():[],n=e.parent.is("node")?e.parent.getPath():[];t.push(this.offset),n.push(e.offset);var r=$t(t,n);switch(r){case"prefix":return"before";case"extension":return"after";default:return t[r]<n[r]?"before":"after"}}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.startPosition=this,new Nn(e)}},{key:"clone",value:function(){return new e(this.parent,this.offset)}},{key:"nodeAfter",get:function(){return this.parent.is("text")?null:this.parent.getChild(this.offset)||null}},{key:"nodeBefore",get:function(){return this.parent.is("text")?null:this.parent.getChild(this.offset-1)||null}},{key:"isAtStart",get:function(){return 0===this.offset}},{key:"isAtEnd",get:function(){var e=this.parent.is("text")?this.parent.data.length:this.parent.childCount;return this.offset===e}},{key:"root",get:function(){return this.parent.root}},{key:"editableElement",get:function(){for(var e=this.parent;!(e instanceof An);){if(!e.parent)return null;e=e.parent}return e}}],[{key:"_createAt",value:function(t,n){if(t instanceof e)return new this(t.parent,t.offset);var r=t;if("end"==n)n=r.is("text")?r.data.length:r.childCount;else{if("before"==n)return this._createBefore(r);if("after"==n)return this._createAfter(r);if(0!==n&&!n)throw new It.b("view-createPositionAt-offset-required: View#createPositionAt() requires the offset when the first parameter is a view item.",r)}return new e(r,n)}},{key:"_createAfter",value:function(t){if(t.is("textProxy"))return new e(t.textNode,t.offsetInText+t.data.length);if(!t.parent)throw new It.b("view-position-after-root: You can not make position after root.",t,{root:t});return new e(t.parent,t.index+1)}},{key:"_createBefore",value:function(t){if(t.is("textProxy"))return new e(t.textNode,t.offsetInText);if(!t.parent)throw new It.b("view-position-before-root: You can not make position before root.",t,{root:t});return new e(t.parent,t.index)}}]),e}(),In=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null;f(this,e),this.start=t.clone(),this.end=n?n.clone():t.clone()}return d(e,[{key:Symbol.iterator,value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(new Nn({boundaries:this,ignoreElementEnd:!0}),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"getEnlarged",value:function(){var t=this.start.getLastMatchingPosition(Dn,{direction:"backward"}),n=this.end.getLastMatchingPosition(Dn);return t.parent.is("text")&&t.isAtStart&&(t=On._createBefore(t.parent)),n.parent.is("text")&&n.isAtEnd&&(n=On._createAfter(n.parent)),new e(t,n)}},{key:"getTrimmed",value:function(){var t=this.start.getLastMatchingPosition(Dn);if(t.isAfter(this.end)||t.isEqual(this.end))return new e(t,t);var n=this.end.getLastMatchingPosition(Dn,{direction:"backward"}),r=t.nodeAfter,i=n.nodeBefore;return r&&r.is("text")&&(t=new On(r,0)),i&&i.is("text")&&(n=new On(i,i.data.length)),new e(t,n)}},{key:"isEqual",value:function(e){return this==e||this.start.isEqual(e.start)&&this.end.isEqual(e.end)}},{key:"containsPosition",value:function(e){return e.isAfter(this.start)&&e.isBefore(this.end)}},{key:"containsRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e.isCollapsed&&(t=!1);var n=this.containsPosition(e.start)||t&&this.start.isEqual(e.start),r=this.containsPosition(e.end)||t&&this.end.isEqual(e.end);return n&&r}},{key:"getDifference",value:function(t){var n=[];return this.isIntersecting(t)?(this.containsPosition(t.start)&&n.push(new e(this.start,t.start)),this.containsPosition(t.end)&&n.push(new e(t.end,this.end))):n.push(this.clone()),n}},{key:"getIntersection",value:function(t){if(this.isIntersecting(t)){var n=this.start,r=this.end;return this.containsPosition(t.start)&&(n=t.start),this.containsPosition(t.end)&&(r=t.end),new e(n,r)}return null}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.boundaries=this,new Nn(e)}},{key:"getCommonAncestor",value:function(){return this.start.getCommonAncestor(this.end)}},{key:"clone",value:function(){return new e(this.start,this.end)}},{key:"getItems",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,t.ignoreElementEnd=!0,n=new Nn(t),r=!0,i=!1,o=void 0,e.prev=6,a=n[Symbol.iterator]();case 8:if(r=(l=a.next()).done){e.next=15;break}return u=l.value,e.next=12,u.item;case 12:r=!0,e.next=8;break;case 15:e.next=21;break;case 17:e.prev=17,e.t0=e.catch(6),i=!0,o=e.t0;case 21:e.prev=21,e.prev=22,r||null==a.return||a.return();case 24:if(e.prev=24,!i){e.next=27;break}throw o;case 27:return e.finish(24);case 28:return e.finish(21);case 29:case"end":return e.stop()}}),e,this,[[6,17,21,29],[22,,24,28]])}))},{key:"getPositions",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,n=new Nn(t),e.next=5,n.position;case 5:r=!0,i=!1,o=void 0,e.prev=8,a=n[Symbol.iterator]();case 10:if(r=(l=a.next()).done){e.next=17;break}return u=l.value,e.next=14,u.nextPosition;case 14:r=!0,e.next=10;break;case 17:e.next=23;break;case 19:e.prev=19,e.t0=e.catch(8),i=!0,o=e.t0;case 23:e.prev=23,e.prev=24,r||null==a.return||a.return();case 26:if(e.prev=26,!i){e.next=29;break}throw o;case 29:return e.finish(26);case 30:return e.finish(23);case 31:case"end":return e.stop()}}),e,this,[[8,19,23,31],[24,,26,30]])}))},{key:"is",value:function(e){return"range"==e||"view:range"==e}},{key:"isIntersecting",value:function(e){return this.start.isBefore(e.end)&&this.end.isAfter(e.start)}},{key:"isCollapsed",get:function(){return this.start.isEqual(this.end)}},{key:"isFlat",get:function(){return this.start.parent===this.end.parent}},{key:"root",get:function(){return this.start.root}}],[{key:"_createFromParentsAndOffsets",value:function(e,t,n,r){return new this(new On(e,t),new On(n,r))}},{key:"_createFromPositionAndShift",value:function(e,t){var n=e,r=e.getShiftedBy(t);return t>0?new this(n,r):new this(r,n)}},{key:"_createIn",value:function(e){return this._createFromParentsAndOffsets(e,0,e,e.childCount)}},{key:"_createOn",value:function(e){var t=e.is("textProxy")?e.offsetSize:1;return this._createFromPositionAndShift(On._createBefore(e),t)}}]),e}();function Dn(e){return!(!e.item.is("attributeElement")&&!e.item.is("uiElement"))}function Rn(e){var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0)o.value,t++}catch(s){r=!0,i=s}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}var Ln=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,n=arguments.length>1?arguments[1]:void 0,r=arguments.length>2?arguments[2]:void 0;f(this,e),this._ranges=[],this._lastRangeBackward=!1,this._isFake=!1,this._fakeSelectionLabel="",this.setTo(t,n,r)}return d(e,[{key:"getRanges",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._ranges[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,a.clone();case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"getFirstRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.start.isBefore(e.start)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?e.clone():null}},{key:"getLastRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.end.isAfter(e.end)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?e.clone():null}},{key:"getFirstPosition",value:function(){var e=this.getFirstRange();return e?e.start.clone():null}},{key:"getLastPosition",value:function(){var e=this.getLastRange();return e?e.end.clone():null}},{key:"isEqual",value:function(e){if(this.isFake!=e.isFake)return!1;if(this.isFake&&this.fakeSelectionLabel!=e.fakeSelectionLabel)return!1;if(this.rangeCount!=e.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(e.anchor)||!this.focus.isEqual(e.focus))return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=!1,l=!0,u=!1,c=void 0;try{for(var f,d=e._ranges[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(a.isEqual(h)){s=!0;break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}if(!s)return!1}}catch(p){n=!0,r=p}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}},{key:"isSimilar",value:function(e){if(this.isBackward!=e.isBackward)return!1;var t=Rn(this.getRanges());if(t!=Rn(e.getRanges()))return!1;if(0==t)return!0;var n=!0,r=!1,i=void 0;try{for(var o,a=this.getRanges()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s=s.getTrimmed();var l=!1,u=!0,c=!1,f=void 0;try{for(var d,h=e.getRanges()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;if(p=p.getTrimmed(),s.start.isEqual(p.start)&&s.end.isEqual(p.end)){l=!0;break}}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}if(!l)return!1}}catch(v){r=!0,i=v}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return!0}},{key:"getSelectedElement",value:function(){if(1!==this.rangeCount)return null;var e=this.getFirstRange(),t=e.start.nodeAfter,n=e.end.nodeBefore;return e.start.parent.is("text")&&e.start.isAtEnd&&e.start.parent.nextSibling&&(t=e.start.parent.nextSibling),e.end.parent.is("text")&&e.end.isAtStart&&e.end.parent.previousSibling&&(n=e.end.parent.previousSibling),t instanceof nn&&t==n?t:null}},{key:"setTo",value:function(t,n,r){if(null===t)this._setRanges([]),this._setFakeOptions(n);else if(t instanceof e||t instanceof jn)this._setRanges(t.getRanges(),t.isBackward),this._setFakeOptions({fake:t.isFake,label:t.fakeSelectionLabel});else if(t instanceof In)this._setRanges([t],n&&n.backward),this._setFakeOptions(n);else if(t instanceof On)this._setRanges([new In(t)]),this._setFakeOptions(n);else if(t instanceof Qt){var i,o=!!r&&!!r.backward;if(void 0===n)throw new It.b("view-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",this);i="in"==n?In._createIn(t):"on"==n?In._createOn(t):new In(On._createAt(t,n)),this._setRanges([i],o),this._setFakeOptions(r)}else{if(!Zt(t))throw new It.b("view-selection-setTo-not-selectable: Cannot set selection to given place.",this);this._setRanges(t,n&&n.backward),this._setFakeOptions(n)}this.fire("change")}},{key:"setFocus",value:function(e,t){if(null===this.anchor)throw new It.b("view-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",this);var n=On._createAt(e,t);if("same"!=n.compareWith(this.focus)){var r=this.anchor;this._ranges.pop(),"before"==n.compareWith(r)?this._addRange(new In(n,r),!0):this._addRange(new In(r,n)),this.fire("change")}}},{key:"is",value:function(e){return"selection"==e||"view:selection"==e}},{key:"_setRanges",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e=Array.from(e),this._ranges=[];var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._addRange(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._lastRangeBackward=!!t}},{key:"_setFakeOptions",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};this._isFake=!!e.fake,this._fakeSelectionLabel=e.fake&&e.label||""}},{key:"_addRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];if(!(e instanceof In))throw new It.b("view-selection-add-range-not-range: Selection range set to an object that is not an instance of view.Range",this);this._pushRange(e),this._lastRangeBackward=!!t}},{key:"_pushRange",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(e.isIntersecting(a))throw new It.b("view-selection-range-intersects: Trying to add a range that intersects with another range from selection.",this,{addedRange:e,intersectingRange:a})}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._ranges.push(new In(e.start,e.end))}},{key:"isFake",get:function(){return this._isFake}},{key:"fakeSelectionLabel",get:function(){return this._fakeSelectionLabel}},{key:"anchor",get:function(){if(!this._ranges.length)return null;var e=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?e.end:e.start).clone()}},{key:"focus",get:function(){if(!this._ranges.length)return null;var e=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?e.start:e.end).clone()}},{key:"isCollapsed",get:function(){return 1===this.rangeCount&&this._ranges[0].isCollapsed}},{key:"rangeCount",get:function(){return this._ranges.length}},{key:"isBackward",get:function(){return!this.isCollapsed&&this._lastRangeBackward}},{key:"editableElement",get:function(){return this.anchor?this.anchor.editableElement:null}}]),e}();Yt(Ln,zt);var jn=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:null,n=arguments.length>1?arguments[1]:void 0,r=arguments.length>2?arguments[2]:void 0;f(this,e),this._selection=new Ln,this._selection.delegate("change").to(this),this._selection.setTo(t,n,r)}return d(e,[{key:"getRanges",value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(this._selection.getRanges(),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"getFirstRange",value:function(){return this._selection.getFirstRange()}},{key:"getLastRange",value:function(){return this._selection.getLastRange()}},{key:"getFirstPosition",value:function(){return this._selection.getFirstPosition()}},{key:"getLastPosition",value:function(){return this._selection.getLastPosition()}},{key:"getSelectedElement",value:function(){return this._selection.getSelectedElement()}},{key:"isEqual",value:function(e){return this._selection.isEqual(e)}},{key:"isSimilar",value:function(e){return this._selection.isSimilar(e)}},{key:"is",value:function(e){return"selection"==e||"documentSelection"==e||"view:selection"==e||"view:documentSelection"==e}},{key:"_setTo",value:function(e,t,n){this._selection.setTo(e,t,n)}},{key:"_setFocus",value:function(e,t){this._selection.setFocus(e,t)}},{key:"isFake",get:function(){return this._selection.isFake}},{key:"fakeSelectionLabel",get:function(){return this._selection.fakeSelectionLabel}},{key:"anchor",get:function(){return this._selection.anchor}},{key:"focus",get:function(){return this._selection.focus}},{key:"isCollapsed",get:function(){return this._selection.isCollapsed}},{key:"rangeCount",get:function(){return this._selection.rangeCount}},{key:"isBackward",get:function(){return this._selection.isBackward}},{key:"editableElement",get:function(){return this._selection.editableElement}},{key:"_ranges",get:function(){return this._selection._ranges}}]),e}();Yt(jn,zt);var Fn=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this._items=[],this._itemMap=new Map,this._idProperty=t.idProperty||"id",this._bindToExternalToInternalMap=new WeakMap,this._bindToInternalToExternalMap=new WeakMap,this._skippedIndexesFromExternal=[]}return d(e,[{key:"add",value:function(e,t){var n,r=this._idProperty;if(r in e){if("string"!=typeof(n=e[r]))throw new It.b("collection-add-invalid-id",this);if(this.get(n))throw new It.b("collection-add-item-already-exists",this)}else e[r]=n=Rt();if(void 0===t)t=this._items.length;else if(t>this._items.length||t<0)throw new It.b("collection-add-item-invalid-index",this);return this._items.splice(t,0,e),this._itemMap.set(n,e),this.fire("add",e,t),this}},{key:"get",value:function(e){var t;if("string"==typeof e)t=this._itemMap.get(e);else{if("number"!=typeof e)throw new It.b("collection-get-invalid-arg: Index or id must be given.",this);t=this._items[e]}return t||null}},{key:"has",value:function(e){if("string"==typeof e)return this._itemMap.has(e);var t=e[this._idProperty];return this._itemMap.has(t)}},{key:"getIndex",value:function(e){var t;return t="string"==typeof e?this._itemMap.get(e):e,this._items.indexOf(t)}},{key:"remove",value:function(e){var t,n,r,i=!1,o=this._idProperty;if("string"==typeof e?(n=e,i=!(r=this._itemMap.get(n)),r&&(t=this._items.indexOf(r))):"number"==typeof e?(t=e,i=!(r=this._items[t]),r&&(n=r[o])):(n=(r=e)[o],i=-1==(t=this._items.indexOf(r))||!this._itemMap.get(n)),i)throw new It.b("collection-remove-404: Item not found.",this);this._items.splice(t,1),this._itemMap.delete(n);var a=this._bindToInternalToExternalMap.get(r);return this._bindToInternalToExternalMap.delete(r),this._bindToExternalToInternalMap.delete(a),this.fire("remove",r,t),r}},{key:"map",value:function(e,t){return this._items.map(e,t)}},{key:"find",value:function(e,t){return this._items.find(e,t)}},{key:"filter",value:function(e,t){return this._items.filter(e,t)}},{key:"clear",value:function(){for(this._bindToCollection&&(this.stopListening(this._bindToCollection),this._bindToCollection=null);this.length;)this.remove(0)}},{key:"bindTo",value:function(e){var t=this;if(this._bindToCollection)throw new It.b("collection-bind-to-rebind: The collection cannot be bound more than once.",this);return this._bindToCollection=e,{as:function(e){t._setUpBindToBinding((function(t){return new e(t)}))},using:function(e){"function"==typeof e?t._setUpBindToBinding((function(t){return e(t)})):t._setUpBindToBinding((function(t){return t[e]}))}}}},{key:"_setUpBindToBinding",value:function(e){var t=this,n=this._bindToCollection,r=function(r,i,o){var a=n._bindToCollection==t,s=n._bindToInternalToExternalMap.get(i);if(a&&s)t._bindToExternalToInternalMap.set(i,s),t._bindToInternalToExternalMap.set(s,i);else{var l=e(i);if(!l)return void t._skippedIndexesFromExternal.push(o);var u=o,c=!0,f=!1,d=void 0;try{for(var h,p=t._skippedIndexesFromExternal[Symbol.iterator]();!(c=(h=p.next()).done);c=!0)o>h.value&&u--}catch(w){f=!0,d=w}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}var v=!0,m=!1,g=void 0;try{for(var y,b=n._skippedIndexesFromExternal[Symbol.iterator]();!(v=(y=b.next()).done);v=!0)u>=y.value&&u++}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}t._bindToExternalToInternalMap.set(i,l),t._bindToInternalToExternalMap.set(l,i),t.add(l,u);for(var k=0;k<n._skippedIndexesFromExternal.length;k++)u<=n._skippedIndexesFromExternal[k]&&n._skippedIndexesFromExternal[k]++}},i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r(0,u,n.getIndex(u))}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}this.listenTo(n,"add",r),this.listenTo(n,"remove",(function(e,n,r){var i=t._bindToExternalToInternalMap.get(n);i&&t.remove(i),t._skippedIndexesFromExternal=t._skippedIndexesFromExternal.reduce((function(e,t){return r<t&&e.push(t-1),r>t&&e.push(t),e}),[])}))}},{key:Symbol.iterator,value:function(){return this._items[Symbol.iterator]()}},{key:"length",get:function(){return this._items.length}},{key:"first",get:function(){return this._items[0]||null}},{key:"last",get:function(){return this._items[this.length-1]||null}}]),e}();Yt(Fn,zt);var zn=function(){function e(){f(this,e),this.selection=new jn,this.roots=new Fn({idProperty:"rootName"}),this.set("isReadOnly",!1),this.set("isFocused",!1),this.set("isComposing",!1),this._postFixers=new Set}return d(e,[{key:"getRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.roots.get(e)}},{key:"registerPostFixer",value:function(e){this._postFixers.add(e)}},{key:"destroy",value:function(){this.roots.map((function(e){return e.destroy()})),this.stopListening()}},{key:"_callPostFixers",value:function(e){var t=!1;do{var n=!0,r=!1,i=void 0;try{for(var o,a=this._postFixers[Symbol.iterator]();!(n=(o=a.next()).done)&&!(t=(0,o.value)(e));n=!0);}catch(s){r=!0,i=s}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}while(t)}}]),e}();Yt(zn,wn);var Vn=10,Bn=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,e,n,r))).getFillerOffset=Un,i._priority=Vn,i._id=null,i._clonesGroup=null,i}return v(t,e),d(t,[{key:"getElementsWithSameId",value:function(){if(null===this.id)throw new It.b("attribute-element-get-elements-with-same-id-no-id: Cannot get elements with the same id for an attribute element without id.",this);return new Set(this._clonesGroup)}},{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e&&e.replace(/^view:/,"");return n?"attributeElement"==r&&n==this.name||l(p(t.prototype),"is",this).call(this,e,n):"attributeElement"==r||l(p(t.prototype),"is",this).call(this,e)}},{key:"isSimilar",value:function(e){return null!==this.id||null!==e.id?this.id===e.id:l(p(t.prototype),"isSimilar",this).call(this,e)&&this.priority==e.priority}},{key:"_clone",value:function(e){var n=l(p(t.prototype),"_clone",this).call(this,e);return n._priority=this._priority,n._id=this._id,n}},{key:"priority",get:function(){return this._priority}},{key:"id",get:function(){return this._id}}]),t}(nn);function Un(){if(Hn(this))return null;for(var e=this.parent;e&&e.is("attributeElement");){if(Hn(e)>1)return null;e=e.parent}return!e||Hn(e)>1?null:this.childCount}function Hn(e){return Array.from(e.getChildren()).filter((function(e){return!e.is("uiElement")})).length}Bn.DEFAULT_PRIORITY=Vn;var qn=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,e,n,r))).getFillerOffset=Wn,i}return 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n=e.start;n.parent.is("element")&&(i=n.parent,!Array.from(i.getChildren()).some((function(e){return!e.is("uiElement")})))&&(n=n.getLastMatchingPosition((function(e){return e.item.is("uiElement")}))),n=this._wrapPosition(n,t);var r=this.document.selection;return r.isCollapsed&&r.getFirstPosition().isEqual(e.start)&&this.setSelection(n),new In(n)}return this._wrapRange(e,t);var i}},{key:"unwrap",value:function(e,t){if(!(t instanceof Bn))throw new It.b("view-writer-unwrap-invalid-attribute",this.document);if(dr(e,this.document),e.isCollapsed)return e;var n=this._breakAttributesRange(e,!0),r=n.start,i=n.end,o=r.parent,a=this._unwrapChildren(o,r.offset,i.offset,t),s=this.mergeAttributes(a.start);s.isEqual(a.start)||a.end.offset--;var l=this.mergeAttributes(a.end);return new In(s,l)}},{key:"rename",value:function(e,t){var n=new an(e,t.getAttributes());return this.insert(On._createAfter(t),n),this.move(In._createIn(t),On._createAt(n,0)),this.remove(In._createOn(t)),n}},{key:"clearClonedElementsGroup",value:function(e){this._cloneGroups.delete(e)}},{key:"createPositionAt",value:function(e,t){return On._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return On._createAfter(e)}},{key:"createPositionBefore",value:function(e){return On._createBefore(e)}},{key:"createRange",value:function(e,t){return new In(e,t)}},{key:"createRangeOn",value:function(e){return In._createOn(e)}},{key:"createRangeIn",value:function(e){return In._createIn(e)}},{key:"createSelection",value:function(e,t,n){return new Ln(e,t,n)}},{key:"_wrapChildren",value:function(e,t,n,r){for(var i=t,o=[];i<n;){var a=e.getChild(i),s=a.is("text"),l=a.is("attributeElement"),u=a.is("emptyElement"),c=a.is("uiElement");if(l&&this._wrapAttributeElement(r,a))o.push(new On(e,i));else if(s||u||c||l&&ar(r,a)){var 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n=this._breakAttributesRange(e,!0),r=n.start,i=n.end,o=r.parent,a=this._wrapChildren(o,r.offset,i.offset,t),s=this.mergeAttributes(a.start);s.isEqual(a.start)||a.end.offset--;var l=this.mergeAttributes(a.end);return new In(s,l)}},{key:"_wrapPosition",value:function(e,t){if(t.isSimilar(e.parent))return sr(e.clone());e.parent.is("text")&&(e=lr(e));var n=this.createAttributeElement();n._priority=Number.POSITIVE_INFINITY,n.isSimilar=function(){return!1},e.parent._insertChild(e.offset,n);var r=new In(e,e.getShiftedBy(1));this.wrap(r,t);var i=new On(n.parent,n.index);n._remove();var o=i.nodeBefore,a=i.nodeAfter;return o instanceof Kt&&a instanceof Kt?ur(o,a):sr(i)}},{key:"_wrapAttributeElement",value:function(e,t){if(!hr(e,t))return!1;if(e.name!==t.name||e.priority!==t.priority)return!1;var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var 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S=!0,E=!1,A=void 0;try{for(var P,M=e.getClassNames()[Symbol.iterator]();!(S=(P=M.next()).done);S=!0){var N=P.value;t.hasClass(N)||this.addClass(N,t)}}catch(O){E=!0,A=O}finally{try{S||null==M.return||M.return()}finally{if(E)throw A}}return!0}},{key:"_unwrapAttributeElement",value:function(e,t){if(!hr(e,t))return!1;if(e.name!==t.name||e.priority!==t.priority)return!1;var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if("class"!==s&&"style"!==s&&(!t.hasAttribute(s)||t.getAttribute(s)!==e.getAttribute(s)))return!1}}catch(w){r=!0,i=w}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}if(!t.hasClass.apply(t,u(e.getClassNames())))return!1;var l=!0,c=!1,f=void 0;try{for(var d,h=e.getStyleNames()[Symbol.iterator]();!(l=(d=h.next()).done);l=!0){var p=d.value;if(!t.hasStyle(p)||t.getStyle(p)!==e.getStyle(p))return!1}}catch(w){c=!0,f=w}finally{try{l||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=e.getAttributeKeys()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;"class"!==k&&"style"!==k&&this.removeAttribute(k,t)}}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}return this.removeClass(Array.from(e.getClassNames()),t),this.removeStyle(Array.from(e.getStyleNames()),t),!0}},{key:"_breakAttributesRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.start,r=e.end;if(dr(e,this.document),e.isCollapsed){var i=this._breakAttributes(e.start,t);return new In(i,i)}var o=this._breakAttributes(r,t),a=o.parent.childCount,s=this._breakAttributes(n,t);return o.offset+=o.parent.childCount-a,new In(s,o)}},{key:"_breakAttributes",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.offset,r=e.parent;if(e.parent.is("emptyElement"))throw new It.b("view-writer-cannot-break-empty-element",this.document);if(e.parent.is("uiElement"))throw new It.b("view-writer-cannot-break-ui-element",this.document);if(!t&&r.is("text")&&fr(r.parent))return e.clone();if(fr(r))return e.clone();if(r.is("text"))return this._breakAttributes(lr(e),t);if(n==r.childCount){var i=new On(r.parent,r.index+1);return this._breakAttributes(i,t)}if(0===n){var o=new On(r.parent,r.index);return this._breakAttributes(o,t)}var a=r.index+1,s=r._clone();r.parent._insertChild(a,s),this._addToClonedElementsGroup(s);var l=r.childCount-n,u=r._removeChildren(n,l);s._appendChild(u);var c=new On(r.parent,a);return this._breakAttributes(c,t)}},{key:"_addToClonedElementsGroup",value:function(e){if(e.root.is("rootElement")){if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._addToClonedElementsGroup(a)}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}var s=e.id;if(s){var l=this._cloneGroups.get(s);l||(l=new Set,this._cloneGroups.set(s,l)),l.add(e),e._clonesGroup=l}}}},{key:"_removeFromClonedElementsGroup",value:function(e){if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._removeFromClonedElementsGroup(a)}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}var s=e.id;if(s){var l=this._cloneGroups.get(s);l&&l.delete(e)}}}]),e}();function or(e){for(var t=e.parent;!fr(t);){if(!t)return;t=t.parent}return t}function ar(e,t){return e.priority<t.priority||!(e.priority>t.priority)&&e.getIdentity()<t.getIdentity()}function sr(e){var t=e.nodeBefore;if(t&&t.is("text"))return new On(t,t.data.length);var n=e.nodeAfter;return n&&n.is("text")?new On(n,0):e}function lr(e){if(e.offset==e.parent.data.length)return new On(e.parent.parent,e.parent.index+1);if(0===e.offset)return new On(e.parent.parent,e.parent.index);var t=e.parent.data.slice(e.offset);return e.parent._data=e.parent.data.slice(0,e.offset),e.parent.parent._insertChild(e.parent.index+1,new Kt(t)),new On(e.parent.parent,e.parent.index+1)}function ur(e,t){var n=e.data.length;return e._data+=t.data,t._remove(),new On(e,n)}var cr=[Kt,Bn,an,qn,tr];function fr(e){return e&&(e.is("containerElement")||e.is("documentFragment"))}function dr(e,t){var n=or(e.start),r=or(e.end);if(!n||!r||n!==r)throw new It.b("view-writer-invalid-range-container",t)}function hr(e,t){return null===e.id&&null===t.id}function pr(e){return"[object Text]"==Object.prototype.toString.call(e)}var vr=function(e){return e.createTextNode("\xa0")},mr=function(e){var t=e.createElement("br");return t.dataset.ckeFiller=!0,t},gr=7,yr=function(){for(var e="",t=0;t<gr;t++)e+="\u200b";return e}();function br(e){return pr(e)&&e.data.substr(0,gr)===yr}function kr(e){return e.data.length==gr&&br(e)}function wr(e){return br(e)?e.data.slice(gr):e.data}function _r(e,t){if(t.keyCode==Kn.arrowleft){var n=t.domTarget.ownerDocument.defaultView.getSelection();if(1==n.rangeCount&&n.getRangeAt(0).collapsed){var r=n.getRangeAt(0).startContainer,i=n.getRangeAt(0).startOffset;br(r)&&i<=gr&&n.collapse(r,0)}}}function xr(e,t,n){var r=arguments.length>3&&void 0!==arguments[3]&&arguments[3];n=n||function(e,t){return e===t},Array.isArray(e)||(e=Array.from(e)),Array.isArray(t)||(t=Array.from(t));var i=function(e,t,n){var r=Tr(e,t,n);if(-1===r)return{firstIndex:-1,lastIndexOld:-1,lastIndexNew:-1};var i=Tr(Cr(e,r),Cr(t,r),n);return{firstIndex:r,lastIndexOld:e.length-i,lastIndexNew:t.length-i}}(e,t,n);return r?function(e,t){var n=e.firstIndex,r=e.lastIndexOld,i=e.lastIndexNew;if(-1===n)return Array(t).fill("equal");var o=[];return n>0&&(o=o.concat(Array(n).fill("equal"))),i-n>0&&(o=o.concat(Array(i-n).fill("insert"))),r-n>0&&(o=o.concat(Array(r-n).fill("delete"))),i<t&&(o=o.concat(Array(t-i).fill("equal"))),o}(i,t.length):function(e,t){var n=[],r=t.firstIndex,i=t.lastIndexOld,o=t.lastIndexNew;return o-r>0&&n.push({index:r,type:"insert",values:e.slice(r,o)}),i-r>0&&n.push({index:r+(o-r),type:"delete",howMany:i-r}),n}(t,i)}function Tr(e,t,n){for(var r=0;r<Math.max(e.length,t.length);r++)if(void 0===e[r]||void 0===t[r]||!n(e[r],t[r]))return r;return-1}function Cr(e,t){return e.slice(t).reverse()}function Sr(e,t,n){n=n||function(e,t){return e===t};var r,i,o=e.length,a=t.length;if(o>200||a>200||o+a>300)return Sr.fastDiff(e,t,n,!0);if(a<o){var s=e;e=t,t=s,r="delete",i="insert"}else r="insert",i="delete";var l=e.length,u=t.length,c=u-l,f={},d={};function h(o){var a=(void 0!==d[o-1]?d[o-1]:-1)+1,s=void 0!==d[o+1]?d[o+1]:-1,c=a>s?-1:1;f[o+c]&&(f[o]=f[o+c].slice(0)),f[o]||(f[o]=[]),f[o].push(a>s?r:i);for(var h=Math.max(a,s),p=h-o;p<l&&h<u&&n(e[p],t[h]);)p++,h++,f[o].push("equal");return h}var p,v=0;do{for(p=-v;p<c;p++)d[p]=h(p);for(p=c+v;p>c;p--)d[p]=h(p);d[c]=h(c),v++}while(d[c]!==u);return f[c].slice(1)}function Er(e,t,n){e.insertBefore(n,e.childNodes[t]||null)}function Ar(e){var t=e.parentNode;t&&t.removeChild(e)}function Pr(e){if(e){if(e.defaultView)return e instanceof e.defaultView.Document;if(e.ownerDocument&&e.ownerDocument.defaultView)return e instanceof e.ownerDocument.defaultView.Node}return!1}Sr.fastDiff=xr;var Mr=function(){function e(t,n){f(this,e),this.domDocuments=new Set,this.domConverter=t,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=n,this.isFocused=!1,this._inlineFiller=null,this._fakeSelectionContainer=null}return d(e,[{key:"markToSync",value:function(e,t){if("text"===e)this.domConverter.mapViewToDom(t.parent)&&this.markedTexts.add(t);else{if(!this.domConverter.mapViewToDom(t))return;if("attributes"===e)this.markedAttributes.add(t);else{if("children"!==e)throw new It.b("view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.",this);this.markedChildren.add(t)}}}},{key:"render",value:function(){var e,t=!0,n=!1,r=void 0;try{for(var i,o=this.markedChildren[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._updateChildrenMappings(a)}}catch(E){n=!0,r=E}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?e=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(e=this.selection.getFirstPosition(),this.markedChildren.add(e.parent));var s=!0,l=!1,u=void 0;try{for(var c,f=this.markedAttributes[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;this._updateAttrs(d)}}catch(E){l=!0,u=E}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}var h=!0,p=!1,v=void 0;try{for(var m,g=this.markedChildren[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value;this._updateChildren(y,{inlineFillerPosition:e})}}catch(E){p=!0,v=E}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}var b=!0,k=!1,w=void 0;try{for(var _,x=this.markedTexts[Symbol.iterator]();!(b=(_=x.next()).done);b=!0){var T=_.value;!this.markedChildren.has(T.parent)&&this.domConverter.mapViewToDom(T.parent)&&this._updateText(T,{inlineFillerPosition:e})}}catch(E){k=!0,w=E}finally{try{b||null==x.return||x.return()}finally{if(k)throw w}}if(e){var C=this.domConverter.viewPositionToDom(e),S=C.parent.ownerDocument;br(C.parent)?this._inlineFiller=C.parent:this._inlineFiller=Nr(S,C.parent,C.offset)}else this._inlineFiller=null;this._updateSelection(),this._updateFocus(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}},{key:"_updateChildrenMappings",value:function(e){var t=this.domConverter.mapViewToDom(e);if(t){var n=this.domConverter.mapViewToDom(e).childNodes,r=Array.from(this.domConverter.viewChildrenToDom(e,t.ownerDocument,{withChildren:!1})),i=this._diffNodeLists(n,r),o=this._findReplaceActions(i,n,r);if(-1!==o.indexOf("replace")){var a={equal:0,insert:0,delete:0},s=!0,l=!1,u=void 0;try{for(var c,f=o[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;if("replace"===d){var h=a.equal+a.insert,p=a.equal+a.delete,v=e.getChild(h);v&&!v.is("uiElement")&&this._updateElementMappings(v,n[p]),Ar(r[h]),a.equal++}else a[d]++}}catch(m){l=!0,u=m}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}}}}},{key:"_updateElementMappings",value:function(e,t){this.domConverter.unbindDomElement(t),this.domConverter.bindElements(t,e),this.markedChildren.add(e),this.markedAttributes.add(e)}},{key:"_getInlineFillerPosition",value:function(){var e=this.selection.getFirstPosition();return e.parent.is("text")?On._createBefore(this.selection.getFirstPosition().parent):e}},{key:"_isSelectionInInlineFiller",value:function(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;var e=this.selection.getFirstPosition(),t=this.domConverter.viewPositionToDom(e);return!!(t&&pr(t.parent)&&br(t.parent))}},{key:"_removeInlineFiller",value:function(){var e=this._inlineFiller;if(!br(e))throw new It.b("view-renderer-filler-was-lost: The inline filler node was lost.",this);kr(e)?e.parentNode.removeChild(e):e.data=e.data.substr(gr),this._inlineFiller=null}},{key:"_needsInlineFillerAtSelection",value:function(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;var e=this.selection.getFirstPosition(),t=e.parent,n=e.offset;if(!this.domConverter.mapViewToDom(t.root))return!1;if(!t.is("element"))return!1;if(!function(e){if("false"==e.getAttribute("contenteditable"))return!1;var t=e.findAncestor((function(e){return e.hasAttribute("contenteditable")}));return!t||"true"==t.getAttribute("contenteditable")}(t))return!1;if(n===t.getFillerOffset())return!1;var r=e.nodeBefore,i=e.nodeAfter;return!(r instanceof Kt||i instanceof Kt)}},{key:"_updateText",value:function(e,t){var n=this.domConverter.findCorrespondingDomText(e),r=this.domConverter.viewToDom(e,n.ownerDocument),i=n.data,o=r.data,a=t.inlineFillerPosition;if(a&&a.parent==e.parent&&a.offset==e.index&&(o=yr+o),i!=o){var s=xr(i,o),l=!0,u=!1,c=void 0;try{for(var f,d=s[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;"insert"===h.type?n.insertData(h.index,h.values.join("")):n.deleteData(h.index,h.howMany)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}},{key:"_updateAttrs",value:function(e){var t=this.domConverter.mapViewToDom(e);if(t){var n=Array.from(t.attributes).map((function(e){return e.name})),r=e.getAttributeKeys(),i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;t.setAttribute(u,e.getAttribute(u))}}catch(m){o=!0,a=m}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var c=!0,f=!1,d=void 0;try{for(var h,p=n[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;e.hasAttribute(v)||t.removeAttribute(v)}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}},{key:"_updateChildren",value:function(e,t){var n=this.domConverter.mapViewToDom(e);if(n){var r=t.inlineFillerPosition,i=this.domConverter.mapViewToDom(e).childNodes,o=Array.from(this.domConverter.viewChildrenToDom(e,n.ownerDocument,{bind:!0,inlineFillerPosition:r}));r&&r.parent===e&&Nr(n.ownerDocument,o,r.offset);var a=this._diffNodeLists(i,o),s=0,l=new Set,u=!0,c=!1,f=void 0;try{for(var d,h=a[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;"insert"===p?(Er(n,s,o[s]),s++):"delete"===p?(l.add(i[s]),Ar(i[s])):(this._markDescendantTextToSync(this.domConverter.domToView(o[s])),s++)}}catch(w){c=!0,f=w}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=l[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;k.parentNode||this.domConverter.unbindDomElement(k)}}catch(w){m=!0,g=w}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}},{key:"_diffNodeLists",value:function(e,t){return Sr(e=function(e,t){var n=Array.from(e);return 0!=n.length&&t?(n[n.length-1]==t&&n.pop(),n):n}(e,this._fakeSelectionContainer),t,Ir.bind(null,this.domConverter))}},{key:"_findReplaceActions",value:function(e,t,n){if(-1===e.indexOf("insert")||-1===e.indexOf("delete"))return e;var r=[],i=[],o=[],a={equal:0,insert:0,delete:0},s=!0,l=!1,u=void 0;try{for(var c,f=e[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;"insert"===d?o.push(n[a.equal+a.insert]):"delete"===d?i.push(t[a.equal+a.delete]):((r=r.concat(Sr(i,o,Or).map((function(e){return"equal"===e?"replace":e})))).push("equal"),i=[],o=[]),a[d]++}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}return r.concat(Sr(i,o,Or).map((function(e){return"equal"===e?"replace":e})))}},{key:"_markDescendantTextToSync",value:function(e){if(e)if(e.is("text"))this.markedTexts.add(e);else if(e.is("element")){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._markDescendantTextToSync(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}}},{key:"_updateSelection",value:function(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();var e=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&e&&(this.selection.isFake?this._updateFakeSelection(e):(this._removeFakeSelection(),this._updateDomSelection(e)))}},{key:"_updateFakeSelection",value:function(e){var t=e.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=function(e){var t=e.createElement("div");return Object.assign(t.style,{position:"fixed",top:0,left:"-9999px",width:"42px"}),t.textContent="\xa0",t}(t));var n=this._fakeSelectionContainer;if(this.domConverter.bindFakeSelection(n,this.selection),this._fakeSelectionNeedsUpdate(e)){n.parentElement&&n.parentElement==e||e.appendChild(n),n.textContent=this.selection.fakeSelectionLabel||"\xa0";var r=t.getSelection(),i=t.createRange();r.removeAllRanges(),i.selectNodeContents(n),r.addRange(i)}}},{key:"_updateDomSelection",value:function(e){var t=e.ownerDocument.defaultView.getSelection();if(this._domSelectionNeedsUpdate(t)){var n=this.domConverter.viewPositionToDom(this.selection.anchor),r=this.domConverter.viewPositionToDom(this.selection.focus);e.focus(),t.collapse(n.parent,n.offset),t.extend(r.parent,r.offset),$n.isGecko&&function(e,t){var n=e.parent;if(n.nodeType==Node.ELEMENT_NODE&&e.offset==n.childNodes.length-1){var r=n.childNodes[e.offset];r&&"BR"==r.tagName&&t.addRange(t.getRangeAt(0))}}(r,t)}}},{key:"_domSelectionNeedsUpdate",value:function(e){if(!this.domConverter.isDomSelectionCorrect(e))return!0;var t=e&&this.domConverter.domSelectionToView(e);return(!t||!this.selection.isEqual(t))&&!(!this.selection.isCollapsed&&this.selection.isSimilar(t))}},{key:"_fakeSelectionNeedsUpdate",value:function(e){var t=this._fakeSelectionContainer,n=e.ownerDocument.getSelection();return!t||t.parentElement!==e||n.anchorNode!==t&&!t.contains(n.anchorNode)||t.textContent!==this.selection.fakeSelectionLabel}},{key:"_removeDomSelection",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.domDocuments[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(o.getSelection().rangeCount){var a=o.activeElement,s=this.domConverter.mapDomToView(a);a&&s&&o.getSelection().removeAllRanges()}}}catch(l){t=!0,n=l}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"_removeFakeSelection",value:function(){var e=this._fakeSelectionContainer;e&&e.remove()}},{key:"_updateFocus",value:function(){if(this.isFocused){var e=this.selection.editableElement;e&&this.domConverter.focus(e)}}}]),e}();function Nr(e,t,n){var r=t instanceof Array?t:t.childNodes,i=r[n];if(pr(i))return i.data=yr+i.data,i;var o=e.createTextNode(yr);return Array.isArray(t)?r.splice(n,0,o):Er(t,n,o),o}function Or(e,t){return Pr(e)&&Pr(t)&&!pr(e)&&!pr(t)&&e.tagName.toLowerCase()===t.tagName.toLowerCase()}function Ir(e,t,n){return t===n||(pr(t)&&pr(n)?t.data===n.data:!(!e.isBlockFiller(t)||!e.isBlockFiller(n)))}Yt(Mr,wn);var Dr={window:window,document:document};function Rr(e){for(var t=0;e.previousSibling;)e=e.previousSibling,t++;return t}function Lr(e){for(var t=[];e&&e.nodeType!=Node.DOCUMENT_NODE;)t.unshift(e),e=e.parentNode;return t}var jr=mr(document),Fr=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this.blockFillerMode=t.blockFillerMode||"br",this.preElements=["pre"],this.blockElements=["p","div","h1","h2","h3","h4","h5","h6","li","dd","dt","figcaption"],this._blockFiller="br"==this.blockFillerMode?mr:vr,this._domToViewMapping=new WeakMap,this._viewToDomMapping=new WeakMap,this._fakeSelectionMapping=new WeakMap}return d(e,[{key:"bindFakeSelection",value:function(e,t){this._fakeSelectionMapping.set(e,new Ln(t))}},{key:"fakeSelectionToView",value:function(e){return this._fakeSelectionMapping.get(e)}},{key:"bindElements",value:function(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}},{key:"unbindDomElement",value:function(e){var t=this._domToViewMapping.get(e);if(t){this._domToViewMapping.delete(e),this._viewToDomMapping.delete(t);for(var n=0,r=Array.from(e.childNodes);n<r.length;n++){var i=r[n];this.unbindDomElement(i)}}}},{key:"bindDocumentFragments",value:function(e,t){this._domToViewMapping.set(e,t),this._viewToDomMapping.set(t,e)}},{key:"viewToDom",value:function(e,t){var n,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(e.is("text")){var i=this._processDataFromViewText(e);return t.createTextNode(i)}if(this.mapViewToDom(e))return this.mapViewToDom(e);if(e.is("documentFragment"))n=t.createDocumentFragment(),r.bind&&this.bindDocumentFragments(n,e);else{if(e.is("uiElement"))return n=e.render(t),r.bind&&this.bindElements(n,e),n;n=e.hasAttribute("xmlns")?t.createElementNS(e.getAttribute("xmlns"),e.name):t.createElement(e.name),r.bind&&this.bindElements(n,e);var o=!0,a=!1,s=void 0;try{for(var l,u=e.getAttributeKeys()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;n.setAttribute(c,e.getAttribute(c))}}catch(g){a=!0,s=g}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}if(r.withChildren||void 0===r.withChildren){var 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34:if(e.t2=i===o,!e.t2){e.next=38;break}return e.next=38,this._blockFiller(n);case 38:case"end":return e.stop()}}),e,this,[[6,22,26,34],[27,,29,33]])}))},{key:"viewRangeToDom",value:function(e){var t=this.viewPositionToDom(e.start),n=this.viewPositionToDom(e.end),r=document.createRange();return r.setStart(t.parent,t.offset),r.setEnd(n.parent,n.offset),r}},{key:"viewPositionToDom",value:function(e){var t,n,r,i=e.parent;if(i.is("text")){var o=this.findCorrespondingDomText(i);if(!o)return null;var a=e.offset;return br(o)&&(a+=gr),{parent:o,offset:a}}if(0===e.offset){if(!(t=this.mapViewToDom(i)))return null;r=t.childNodes[0]}else{var s=e.nodeBefore;if(!(n=s.is("text")?this.findCorrespondingDomText(s):this.mapViewToDom(e.nodeBefore)))return null;t=n.parentNode,r=n.nextSibling}return pr(r)&&br(r)?{parent:r,offset:gr}:{parent:t,offset:n?Rr(n)+1:0}}},{key:"domToView",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};if(this.isBlockFiller(e,this.blockFillerMode))return null;var n,r=this.getParentUIElement(e,this._domToViewMapping);if(r)return r;if(pr(e)){if(kr(e))return null;var i=this._processDataFromDomText(e);return""===i?null:new Kt(i)}if(this.isComment(e))return null;if(this.mapDomToView(e))return this.mapDomToView(e);if(this.isDocumentFragment(e))n=new rr,t.bind&&this.bindDocumentFragments(e,n);else{var o=t.keepOriginalCase?e.tagName:e.tagName.toLowerCase();n=new nn(o),t.bind&&this.bindElements(e,n);for(var a=e.attributes,s=a.length-1;s>=0;s--)n._setAttribute(a[s].name,a[s].value)}if(t.withChildren||void 0===t.withChildren){var l=!0,u=!1,c=void 0;try{for(var f,d=this.domChildrenToView(e,t)[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;n._appendChild(h)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}return n}},{key:"domChildrenToView",value:s.mark((function e(t){var n,r,i,o,a=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=a.length>1&&void 0!==a[1]?a[1]:{},r=0;case 2:if(!(r<t.childNodes.length)){e.next=11;break}if(i=t.childNodes[r],o=this.domToView(i,n),e.t0=null!==o,!e.t0){e.next=8;break}return e.next=8,o;case 8:r++,e.next=2;break;case 11:case"end":return e.stop()}}),e,this)}))},{key:"domSelectionToView",value:function(e){if(1===e.rangeCount){var t=e.getRangeAt(0).startContainer;pr(t)&&(t=t.parentNode);var n=this.fakeSelectionToView(t);if(n)return n}for(var r=this.isDomSelectionBackward(e),i=[],o=0;o<e.rangeCount;o++){var a=e.getRangeAt(o),s=this.domRangeToView(a);s&&i.push(s)}return new Ln(i,{backward:r})}},{key:"domRangeToView",value:function(e){var t=this.domPositionToView(e.startContainer,e.startOffset),n=this.domPositionToView(e.endContainer,e.endOffset);return t&&n?new In(t,n):null}},{key:"domPositionToView",value:function(e,t){if(this.isBlockFiller(e,this.blockFillerMode))return this.domPositionToView(e.parentNode,Rr(e));var n=this.mapDomToView(e);if(n&&n.is("uiElement"))return On._createBefore(n);if(pr(e)){if(kr(e))return this.domPositionToView(e.parentNode,Rr(e));var r=this.findCorrespondingViewText(e),i=t;return r?(br(e)&&(i=(i-=gr)<0?0:i),new On(r,i)):null}if(0===t){var o=this.mapDomToView(e);if(o)return new On(o,0)}else{var a=e.childNodes[t-1],s=pr(a)?this.findCorrespondingViewText(a):this.mapDomToView(a);if(s&&s.parent)return new On(s.parent,s.index+1)}return null}},{key:"mapDomToView",value:function(e){return this.getParentUIElement(e)||this._domToViewMapping.get(e)}},{key:"findCorrespondingViewText",value:function(e){if(kr(e))return null;var t=this.getParentUIElement(e);if(t)return t;var n=e.previousSibling;if(n){if(!this.isElement(n))return null;var r=this.mapDomToView(n);if(r)return r.nextSibling instanceof Kt?r.nextSibling:null}else{var i=this.mapDomToView(e.parentNode);if(i){var o=i.getChild(0);return o instanceof Kt?o:null}}return null}},{key:"mapViewToDom",value:function(e){return this._viewToDomMapping.get(e)}},{key:"findCorrespondingDomText",value:function(e){var t=e.previousSibling;return t&&this.mapViewToDom(t)?this.mapViewToDom(t).nextSibling:!t&&e.parent&&this.mapViewToDom(e.parent)?this.mapViewToDom(e.parent).childNodes[0]:null}},{key:"focus",value:function(e){var t=this.mapViewToDom(e);if(t&&t.ownerDocument.activeElement!==t){var n=Dr.window,r=n.scrollX,i=n.scrollY,o=[];Vr(t,(function(e){var t=e.scrollLeft,n=e.scrollTop;o.push([t,n])})),t.focus(),Vr(t,(function(e){var t=o.shift(),n=c(t,2),r=n[0],i=n[1];e.scrollLeft=r,e.scrollTop=i})),Dr.window.scrollTo(r,i)}}},{key:"isElement",value:function(e){return e&&e.nodeType==Node.ELEMENT_NODE}},{key:"isDocumentFragment",value:function(e){return e&&e.nodeType==Node.DOCUMENT_FRAGMENT_NODE}},{key:"isComment",value:function(e){return 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h}}}},{key:"detachDomRoot",value:function(e){var t=this.domRoots.get(e);Array.from(t.attributes).forEach((function(e){var n=e.name;return t.removeAttribute(n)}));var n=this._initialDomRootAttributes.get(t);for(var r in n)t.setAttribute(r,n[r]);this.domRoots.delete(e),this.domConverter.unbindDomElement(t)}},{key:"getDomRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.domRoots.get(e)}},{key:"addObserver",value:function(e){var t=this._observers.get(e);if(t)return t;t=new e(this),this._observers.set(e,t);var n=!0,r=!1,i=void 0;try{for(var o,a=this.domRoots[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];t.observe(f,u)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t.enable(),t}},{key:"getObserver",value:function(e){return this._observers.get(e)}},{key:"disableObservers",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.disable()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"enableObservers",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.enable()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"scrollToTheSelection",value:function(){var e=this.document.selection.getFirstRange();e&&Li({target:this.domConverter.viewRangeToDom(e),viewportOffset:20})}},{key:"focus",value:function(){if(!this.document.isFocused){var e=this.document.selection.editableElement;e&&(this.domConverter.focus(e),this.forceRender())}}},{key:"change",value:function(e){if(this.isRenderingInProgress||this._postFixersInProgress)throw new It.b("cannot-change-view-tree: Attempting to make changes to the view when it is in an incorrect state: rendering or post-fixers are in progress. This may cause some unexpected behavior and inconsistency between the DOM and the view.",this);try{if(this._ongoingChange)return e(this._writer);this._ongoingChange=!0;var t=e(this._writer);return this._ongoingChange=!1,!this._renderingDisabled&&this._hasChangedSinceTheLastRendering&&(this._postFixersInProgress=!0,this.document._callPostFixers(this._writer),this._postFixersInProgress=!1,this.fire("render")),t}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"forceRender",value:function(){this._hasChangedSinceTheLastRendering=!0,this.change((function(){}))}},{key:"destroy",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._observers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.destroy()}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this.document.destroy(),this.stopListening()}},{key:"createPositionAt",value:function(e,t){return On._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return On._createAfter(e)}},{key:"createPositionBefore",value:function(e){return On._createBefore(e)}},{key:"createRange",value:function(e,t){return new In(e,t)}},{key:"createRangeOn",value:function(e){return In._createOn(e)}},{key:"createRangeIn",value:function(e){return In._createIn(e)}},{key:"createSelection",value:function(e,t,n){return new Ln(e,t,n)}},{key:"_disableRendering",value:function(e){this._renderingDisabled=e,0==e&&this.change((function(){}))}},{key:"_render",value:function(){this.isRenderingInProgress=!0,this.disableObservers(),this._renderer.render(),this.enableObservers(),this.isRenderingInProgress=!1}}]),e}();function $i(e){return R(e)?Xt(e):new Map(e)}Yt(Yi,wn);var Gi=function(){function e(t){f(this,e),this.parent=null,this._attrs=$i(t)}return d(e,[{key:"getPath",value:function(){for(var e=[],t=this;t.parent;)e.unshift(t.startOffset),t=t.parent;return e}},{key:"getAncestors",value:function(){for(var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeSelf:!1,parentFirst:!1},t=[],n=e.includeSelf?this:this.parent;n;)t[e.parentFirst?"push":"unshift"](n),n=n.parent;return t}},{key:"getCommonAncestor",value:function(e){for(var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=this.getAncestors(t),r=e.getAncestors(t),i=0;n[i]==r[i]&&n[i];)i++;return 0===i?null:n[i-1]}},{key:"isBefore",value:function(e){if(this==e)return!1;if(this.root!==e.root)return!1;var t=this.getPath(),n=e.getPath(),r=$t(t,n);switch(r){case"prefix":return!0;case"extension":return!1;default:return t[r]<n[r]}}},{key:"isAfter",value:function(e){return this!=e&&this.root===e.root&&!this.isBefore(e)}},{key:"hasAttribute",value:function(e){return this._attrs.has(e)}},{key:"getAttribute",value:function(e){return this._attrs.get(e)}},{key:"getAttributes",value:function(){return this._attrs.entries()}},{key:"getAttributeKeys",value:function(){return this._attrs.keys()}},{key:"toJSON",value:function(){var e={};return this._attrs.size&&(e.attributes=Array.from(this._attrs).reduce((function(e,t){return e[t[0]]=t[1],e}),{})),e}},{key:"is",value:function(e){return"node"==e||"model:node"==e}},{key:"_clone",value:function(){return new e(this._attrs)}},{key:"_remove",value:function(){this.parent._removeChildren(this.index)}},{key:"_setAttribute",value:function(e,t){this._attrs.set(e,t)}},{key:"_setAttributesTo",value:function(e){this._attrs=$i(e)}},{key:"_removeAttribute",value:function(e){return this._attrs.delete(e)}},{key:"_clearAttributes",value:function(){this._attrs.clear()}},{key:"index",get:function(){var e;if(!this.parent)return null;if(null===(e=this.parent.getChildIndex(this)))throw new It.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return e}},{key:"startOffset",get:function(){var e;if(!this.parent)return null;if(null===(e=this.parent.getChildStartOffset(this)))throw new It.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return e}},{key:"offsetSize",get:function(){return 1}},{key:"endOffset",get:function(){return this.parent?this.startOffset+this.offsetSize:null}},{key:"nextSibling",get:function(){var e=this.index;return null!==e&&this.parent.getChild(e+1)||null}},{key:"previousSibling",get:function(){var e=this.index;return null!==e&&this.parent.getChild(e-1)||null}},{key:"root",get:function(){for(var e=this;e.parent;)e=e.parent;return e}},{key:"document",get:function(){return this.root==this?null:this.root.document||null}}]),e}(),Qi=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,n)))._data=e||"",r}return v(t,e),d(t,[{key:"is",value:function(e){return"text"==e||"model:text"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.data=this.data,e}},{key:"_clone",value:function(){return new t(this.data,this.getAttributes())}},{key:"offsetSize",get:function(){return this.data.length}},{key:"data",get:function(){return this._data}}],[{key:"fromJSON",value:function(e){return new t(e.data,e.attributes)}}]),t}(Gi),Ki=function(){function e(t,n,r){if(f(this,e),this.textNode=t,n<0||n>t.offsetSize)throw new It.b("model-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.",this);if(r<0||n+r>t.offsetSize)throw new It.b("model-textproxy-wrong-length: Given length value is incorrect.",this);this.data=t.data.substring(n,n+r),this.offsetInText=n}return d(e,[{key:"is",value:function(e){return"textProxy"==e||"model:textProxy"==e}},{key:"getPath",value:function(){var e=this.textNode.getPath();return e.length>0&&(e[e.length-1]+=this.offsetInText),e}},{key:"getAncestors",value:function(){for(var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeSelf:!1,parentFirst:!1},t=[],n=e.includeSelf?this:this.parent;n;)t[e.parentFirst?"push":"unshift"](n),n=n.parent;return t}},{key:"hasAttribute",value:function(e){return this.textNode.hasAttribute(e)}},{key:"getAttribute",value:function(e){return this.textNode.getAttribute(e)}},{key:"getAttributes",value:function(){return this.textNode.getAttributes()}},{key:"getAttributeKeys",value:function(){return this.textNode.getAttributeKeys()}},{key:"startOffset",get:function(){return null!==this.textNode.startOffset?this.textNode.startOffset+this.offsetInText:null}},{key:"offsetSize",get:function(){return this.data.length}},{key:"endOffset",get:function(){return null!==this.startOffset?this.startOffset+this.offsetSize:null}},{key:"isPartial",get:function(){return this.offsetSize!==this.textNode.offsetSize}},{key:"parent",get:function(){return this.textNode.parent}},{key:"root",get:function(){return this.textNode.root}},{key:"document",get:function(){return this.textNode.document}}]),e}(),Ji=function(){function e(t){f(this,e),this._nodes=[],t&&this._insertNodes(0,t)}return d(e,[{key:Symbol.iterator,value:function(){return this._nodes[Symbol.iterator]()}},{key:"getNode",value:function(e){return this._nodes[e]||null}},{key:"getNodeIndex",value:function(e){var t=this._nodes.indexOf(e);return-1==t?null:t}},{key:"getNodeStartOffset",value:function(e){var t=this.getNodeIndex(e);return null===t?null:this._nodes.slice(0,t).reduce((function(e,t){return e+t.offsetSize}),0)}},{key:"indexToOffset",value:function(e){if(e==this._nodes.length)return this.maxOffset;var t=this._nodes[e];if(!t)throw new It.b("model-nodelist-index-out-of-bounds: Given index cannot be found in the node list.",this);return this.getNodeStartOffset(t)}},{key:"offsetToIndex",value:function(e){var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=this._nodes[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(e>=t&&e<t+s.offsetSize)return this.getNodeIndex(s);t+=s.offsetSize}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}if(t!=e)throw new It.b("model-nodelist-offset-out-of-bounds: Given offset cannot be found in the node list.",this,{offset:e,nodeList:this});return this.length}},{key:"_insertNodes",value:function(e,t){var n,r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)if(!(a.value instanceof Gi))throw new It.b("model-nodelist-insertNodes-not-node: Trying to insert an object which is not a Node instance.",this)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}(n=this._nodes).splice.apply(n,[e,0].concat(u(t)))}},{key:"_removeNodes",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1;return this._nodes.splice(e,t)}},{key:"toJSON",value:function(){return this._nodes.map((function(e){return e.toJSON()}))}},{key:"length",get:function(){return this._nodes.length}},{key:"maxOffset",get:function(){return this._nodes.reduce((function(e,t){return e+t.offsetSize}),0)}}]),e}(),Xi=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,n))).name=e,i._children=new Ji,r&&i._insertChild(0,r),i}return v(t,e),d(t,[{key:"is",value:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,r=e.replace(/^model:/,"");return n?"element"==r&&n==this.name:"element"==r||r==this.name||l(p(t.prototype),"is",this).call(this,e)}},{key:"getChild",value:function(e){return this._children.getNode(e)}},{key:"getChildren",value:function(){return this._children[Symbol.iterator]()}},{key:"getChildIndex",value:function(e){return this._children.getNodeIndex(e)}},{key:"getChildStartOffset",value:function(e){return this._children.getNodeStartOffset(e)}},{key:"offsetToIndex",value:function(e){return this._children.offsetToIndex(e)}},{key:"getNodeByPath",value:function(e){var t=this,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t=t.getChild(t.offsetToIndex(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);if(e.name=this.name,this._children.length>0){e.children=[];var n=!0,r=!1,i=void 0;try{for(var o,a=this._children[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.children.push(s.toJSON())}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}return e}},{key:"_clone",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0],n=e?Array.from(this._children).map((function(e){return e._clone(!0)})):null;return new t(this.name,this.getAttributes(),n)}},{key:"_appendChild",value:function(e){this._insertChild(this.childCount,e)}},{key:"_insertChild",value:function(e,t){var n=function(e){return"string"==typeof e?[new Qi(e)]:(Zt(e)||(e=[e]),Array.from(e).map((function(e){return"string"==typeof e?new Qi(e):e instanceof Ki?new Qi(e.data,e.getAttributes()):e})))}(t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;null!==l.parent&&l._remove(),l.parent=this}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._children._insertNodes(e,n)}},{key:"_removeChildren",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1,n=this._children._removeNodes(e,t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.parent=null}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"childCount",get:function(){return this._children.length}},{key:"maxOffset",get:function(){return this._children.maxOffset}},{key:"isEmpty",get:function(){return 0===this.childCount}}],[{key:"fromJSON",value:function(e){var n=null;if(e.children){n=[];var r=!0,i=!1,o=void 0;try{for(var a,s=e.children[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.name?n.push(t.fromJSON(l)):n.push(Qi.fromJSON(l))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}return new t(e.name,e.attributes,n)}}]),t}(Gi),Zi=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};if(f(this,e),!t.boundaries&&!t.startPosition)throw new It.b("model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.",null);var n=t.direction||"forward";if("forward"!=n&&"backward"!=n)throw new It.b("model-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.",t,{direction:n});this.direction=n,this.boundaries=t.boundaries||null,t.startPosition?this.position=t.startPosition.clone():this.position=to._createAt(this.boundaries["backward"==this.direction?"end":"start"]),this.position.stickiness="toNone",this.singleCharacters=!!t.singleCharacters,this.shallow=!!t.shallow,this.ignoreElementEnd=!!t.ignoreElementEnd,this._boundaryStartParent=this.boundaries?this.boundaries.start.parent:null,this._boundaryEndParent=this.boundaries?this.boundaries.end.parent:null,this._visitedParent=this.position.parent}return d(e,[{key:Symbol.iterator,value:function(){return this}},{key:"skip",value:function(e){var t,n,r,i;do{var o;r=this.position,i=this._visitedParent,t=(o=this.next()).done,n=o.value}while(!t&&e(n));t||(this.position=r,this._visitedParent=i)}},{key:"next",value:function(){return"forward"==this.direction?this._next():this._previous()}},{key:"_next",value:function(){var e=this.position,t=this.position.clone(),n=this._visitedParent;if(null===n.parent&&t.offset===n.maxOffset)return{done:!0};if(n===this._boundaryEndParent&&t.offset==this.boundaries.end.offset)return{done:!0};var r=t.textNode?t.textNode:t.nodeAfter;if(r instanceof Xi)return this.shallow?t.offset++:(t.path.push(0),this._visitedParent=r),this.position=t,eo("elementStart",r,e,t,1);if(r instanceof Qi){var i;if(this.singleCharacters)i=1;else{var o=r.endOffset;this._boundaryEndParent==n&&this.boundaries.end.offset<o&&(o=this.boundaries.end.offset),i=o-t.offset}var a=t.offset-r.startOffset,s=new Ki(r,a,i);return t.offset+=i,this.position=t,eo("text",s,e,t,i)}return t.path.pop(),t.offset++,this.position=t,this._visitedParent=n.parent,this.ignoreElementEnd?this._next():eo("elementEnd",n,e,t)}},{key:"_previous",value:function(){var e=this.position,t=this.position.clone(),n=this._visitedParent;if(null===n.parent&&0===t.offset)return{done:!0};if(n==this._boundaryStartParent&&t.offset==this.boundaries.start.offset)return{done:!0};var r=t.textNode?t.textNode:t.nodeBefore;if(r instanceof Xi)return t.offset--,this.shallow?(this.position=t,eo("elementStart",r,e,t,1)):(t.path.push(r.maxOffset),this.position=t,this._visitedParent=r,this.ignoreElementEnd?this._previous():eo("elementEnd",r,e,t));if(r instanceof Qi){var i;if(this.singleCharacters)i=1;else{var o=r.startOffset;this._boundaryStartParent==n&&this.boundaries.start.offset>o&&(o=this.boundaries.start.offset),i=t.offset-o}var a=t.offset-r.startOffset,s=new Ki(r,a-i,i);return t.offset-=i,this.position=t,eo("text",s,e,t,i)}return t.path.pop(),this.position=t,this._visitedParent=n.parent,eo("elementStart",n,e,t,1)}}]),e}();function eo(e,t,n,r,i){return{done:!1,value:{type:e,item:t,previousPosition:n,nextPosition:r,length:i}}}var to=function(){function e(t,n){var r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(f(this,e),!t.is("element")&&!t.is("documentFragment"))throw new It.b("model-position-root-invalid: Position root invalid.",t);if(!(n instanceof Array)||0===n.length)throw new It.b("model-position-path-incorrect-format: Position path must be an array with at least one item.",t,{path:n});n=t.getPath().concat(n),t=t.root,this.root=t,this.path=n,this.stickiness=r}return d(e,[{key:"compareWith",value:function(e){if(this.root!=e.root)return"different";var t=$t(this.path,e.path);switch(t){case"same":return"same";case"prefix":return"before";case"extension":return"after";default:return this.path[t]<e.path[t]?"before":"after"}}},{key:"getLastMatchingPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};t.startPosition=this;var n=new Zi(t);return n.skip(e),n.position}},{key:"getParentPath",value:function(){return this.path.slice(0,-1)}},{key:"getAncestors",value:function(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}},{key:"getCommonPath",value:function(e){if(this.root!=e.root)return[];var t=$t(this.path,e.path),n="string"==typeof t?Math.min(this.path.length,e.path.length):t;return this.path.slice(0,n)}},{key:"getCommonAncestor",value:function(e){for(var t=this.getAncestors(),n=e.getAncestors(),r=0;t[r]==n[r]&&t[r];)r++;return 0===r?null:t[r-1]}},{key:"getShiftedBy",value:function(e){var t=this.clone(),n=t.offset+e;return t.offset=n<0?0:n,t}},{key:"isAfter",value:function(e){return"after"==this.compareWith(e)}},{key:"isBefore",value:function(e){return"before"==this.compareWith(e)}},{key:"isEqual",value:function(e){return"same"==this.compareWith(e)}},{key:"isTouching",value:function(t){var n=null,r=null;switch(this.compareWith(t)){case"same":return!0;case"before":n=e._createAt(this),r=e._createAt(t);break;case"after":n=e._createAt(t),r=e._createAt(this);break;default:return!1}for(var i=n.parent;n.path.length+r.path.length;){if(n.isEqual(r))return!0;if(n.path.length>r.path.length){if(n.offset!==i.maxOffset)return!1;n.path=n.path.slice(0,-1),i=i.parent,n.offset++}else{if(0!==r.offset)return!1;r.path=r.path.slice(0,-1)}}}},{key:"is",value:function(e){return"position"==e||"model:position"==e}},{key:"hasSameParentAs",value:function(e){return this.root===e.root&&"same"==$t(this.getParentPath(),e.getParentPath())}},{key:"getTransformedByOperation",value:function(t){var n;switch(t.type){case"insert":n=this._getTransformedByInsertOperation(t);break;case"move":case"remove":case"reinsert":n=this._getTransformedByMoveOperation(t);break;case"split":n=this._getTransformedBySplitOperation(t);break;case"merge":n=this._getTransformedByMergeOperation(t);break;default:n=e._createAt(this)}return n}},{key:"_getTransformedByInsertOperation",value:function(e){return this._getTransformedByInsertion(e.position,e.howMany)}},{key:"_getTransformedByMoveOperation",value:function(e){return this._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany)}},{key:"_getTransformedBySplitOperation",value:function(e){var t=e.movedRange;return t.containsPosition(this)||t.start.isEqual(this)&&"toNext"==this.stickiness?this._getCombined(e.splitPosition,e.moveTargetPosition):e.graveyardPosition?this._getTransformedByMove(e.graveyardPosition,e.insertionPosition,1):this._getTransformedByInsertion(e.insertionPosition,1)}},{key:"_getTransformedByMergeOperation",value:function(t){var n,r=t.movedRange;return r.containsPosition(this)||r.start.isEqual(this)?(n=this._getCombined(t.sourcePosition,t.targetPosition),t.sourcePosition.isBefore(t.targetPosition)&&(n=n._getTransformedByDeletion(t.deletionPosition,1))):n=this.isEqual(t.deletionPosition)?e._createAt(t.deletionPosition):this._getTransformedByMove(t.deletionPosition,t.graveyardPosition,1),n}},{key:"_getTransformedByDeletion",value:function(t,n){var r=e._createAt(this);if(this.root!=t.root)return r;if("same"==$t(t.getParentPath(),this.getParentPath())){if(t.offset<this.offset){if(t.offset+n>this.offset)return null;r.offset-=n}}else if("prefix"==$t(t.getParentPath(),this.getParentPath())){var i=t.path.length-1;if(t.offset<=this.path[i]){if(t.offset+n>this.path[i])return null;r.path[i]-=n}}return r}},{key:"_getTransformedByInsertion",value:function(t,n){var r=e._createAt(this);if(this.root!=t.root)return r;if("same"==$t(t.getParentPath(),this.getParentPath()))(t.offset<this.offset||t.offset==this.offset&&"toPrevious"!=this.stickiness)&&(r.offset+=n);else if("prefix"==$t(t.getParentPath(),this.getParentPath())){var i=t.path.length-1;t.offset<=this.path[i]&&(r.path[i]+=n)}return r}},{key:"_getTransformedByMove",value:function(t,n,r){if(n=n._getTransformedByDeletion(t,r),t.isEqual(n))return e._createAt(this);var i=this._getTransformedByDeletion(t,r);return null===i||t.isEqual(this)&&"toNext"==this.stickiness||t.getShiftedBy(r).isEqual(this)&&"toPrevious"==this.stickiness?this._getCombined(t,n):i._getTransformedByInsertion(n,r)}},{key:"_getCombined",value:function(t,n){var r=t.path.length-1,i=e._createAt(n);return i.stickiness=this.stickiness,i.offset=i.offset+this.path[r]-t.offset,i.path=i.path.concat(this.path.slice(r+1)),i}},{key:"toJSON",value:function(){return{root:this.root.toJSON(),path:Array.from(this.path),stickiness:this.stickiness}}},{key:"clone",value:function(){return new this.constructor(this.root,this.path,this.stickiness)}},{key:"offset",get:function(){return function(e){var t=null==e?0:e.length;return t?e[t-1]:void 0}(this.path)},set:function(e){this.path[this.path.length-1]=e}},{key:"parent",get:function(){for(var e=this.root,t=0;t<this.path.length-1;t++)if(!(e=e.getChild(e.offsetToIndex(this.path[t]))))throw new It.b("model-position-path-incorrect: The position's path is incorrect.",this,{position:this});if(e.is("text"))throw new It.b("model-position-path-incorrect: The position's path is incorrect.",this,{position:this});return e}},{key:"index",get:function(){return this.parent.offsetToIndex(this.offset)}},{key:"textNode",get:function(){var e=this.parent.getChild(this.index);return e instanceof Qi&&e.startOffset<this.offset?e:null}},{key:"nodeAfter",get:function(){return null===this.textNode?this.parent.getChild(this.index):null}},{key:"nodeBefore",get:function(){return null===this.textNode?this.parent.getChild(this.index-1):null}},{key:"isAtStart",get:function(){return 0===this.offset}},{key:"isAtEnd",get:function(){return this.offset==this.parent.maxOffset}}],[{key:"_createAt",value:function(t,n){var r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(t instanceof e)return new e(t.root,t.path,t.stickiness);var i=t;if("end"==n)n=i.maxOffset;else{if("before"==n)return this._createBefore(i,r);if("after"==n)return this._createAfter(i,r);if(0!==n&&!n)throw new It.b("model-createPositionAt-offset-required: Model#createPositionAt() requires the offset when the first parameter is a model item.",[this,t])}if(!i.is("element")&&!i.is("documentFragment"))throw new It.b("model-position-parent-incorrect: Position parent have to be a element or document fragment.",[this,t]);var o=i.getPath();return o.push(n),new this(i.root,o,r)}},{key:"_createAfter",value:function(e,t){if(!e.parent)throw new It.b("model-position-after-root: You cannot make a position after root.",[this,e],{root:e});return this._createAt(e.parent,e.endOffset,t)}},{key:"_createBefore",value:function(e,t){if(!e.parent)throw new It.b("model-position-before-root: You cannot make a position before root.",e,{root:e});return this._createAt(e.parent,e.startOffset,t)}},{key:"fromJSON",value:function(t,n){if("$graveyard"===t.root){var r=new e(n.graveyard,t.path);return r.stickiness=t.stickiness,r}if(!n.getRoot(t.root))throw new It.b("model-position-fromjson-no-root: Cannot create position for document. Root with specified name does not exist.",n,{rootName:t.root});return new e(n.getRoot(t.root),t.path,t.stickiness)}}]),e}(),no=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null;f(this,e),this.start=to._createAt(t),this.end=n?to._createAt(n):to._createAt(t),this.start.stickiness=this.isCollapsed?"toNone":"toNext",this.end.stickiness=this.isCollapsed?"toNone":"toPrevious"}return d(e,[{key:Symbol.iterator,value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return e.delegateYield(new Zi({boundaries:this,ignoreElementEnd:!0}),"t0",1);case 1:case"end":return e.stop()}}),e,this)}))},{key:"containsPosition",value:function(e){return e.isAfter(this.start)&&e.isBefore(this.end)}},{key:"containsRange",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];e.isCollapsed&&(t=!1);var n=this.containsPosition(e.start)||t&&this.start.isEqual(e.start),r=this.containsPosition(e.end)||t&&this.end.isEqual(e.end);return n&&r}},{key:"containsItem",value:function(e){var t=to._createBefore(e);return this.containsPosition(t)||this.start.isEqual(t)}},{key:"is",value:function(e){return"range"==e||"model:range"==e}},{key:"isEqual",value:function(e){return this.start.isEqual(e.start)&&this.end.isEqual(e.end)}},{key:"isIntersecting",value:function(e){return this.start.isBefore(e.end)&&this.end.isAfter(e.start)}},{key:"getDifference",value:function(t){var n=[];return this.isIntersecting(t)?(this.containsPosition(t.start)&&n.push(new e(this.start,t.start)),this.containsPosition(t.end)&&n.push(new e(t.end,this.end))):n.push(new e(this.start,this.end)),n}},{key:"getIntersection",value:function(t){if(this.isIntersecting(t)){var n=this.start,r=this.end;return this.containsPosition(t.start)&&(n=t.start),this.containsPosition(t.end)&&(r=t.end),new e(n,r)}return null}},{key:"getMinimalFlatRanges",value:function(){for(var t=[],n=this.start.getCommonPath(this.end).length,r=to._createAt(this.start),i=r.parent;r.path.length>n+1;){var o=i.maxOffset-r.offset;0!==o&&t.push(new e(r,r.getShiftedBy(o))),r.path=r.path.slice(0,-1),r.offset++,i=i.parent}for(;r.path.length<=this.end.path.length;){var a=this.end.path[r.path.length-1],s=a-r.offset;0!==s&&t.push(new e(r,r.getShiftedBy(s))),r.offset=a,r.path.push(0)}return t}},{key:"getWalker",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return e.boundaries=this,new Zi(e)}},{key:"getItems",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,t.ignoreElementEnd=!0,n=new Zi(t),r=!0,i=!1,o=void 0,e.prev=6,a=n[Symbol.iterator]();case 8:if(r=(l=a.next()).done){e.next=15;break}return u=l.value,e.next=12,u.item;case 12:r=!0,e.next=8;break;case 15:e.next=21;break;case 17:e.prev=17,e.t0=e.catch(6),i=!0,o=e.t0;case 21:e.prev=21,e.prev=22,r||null==a.return||a.return();case 24:if(e.prev=24,!i){e.next=27;break}throw o;case 27:return e.finish(24);case 28:return e.finish(21);case 29:case"end":return e.stop()}}),e,this,[[6,17,21,29],[22,,24,28]])}))},{key:"getPositions",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c=arguments;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:return(t=c.length>0&&void 0!==c[0]?c[0]:{}).boundaries=this,n=new Zi(t),e.next=5,n.position;case 5:r=!0,i=!1,o=void 0,e.prev=8,a=n[Symbol.iterator]();case 10:if(r=(l=a.next()).done){e.next=17;break}return u=l.value,e.next=14,u.nextPosition;case 14:r=!0,e.next=10;break;case 17:e.next=23;break;case 19:e.prev=19,e.t0=e.catch(8),i=!0,o=e.t0;case 23:e.prev=23,e.prev=24,r||null==a.return||a.return();case 26:if(e.prev=26,!i){e.next=29;break}throw o;case 29:return e.finish(26);case 30:return e.finish(23);case 31:case"end":return e.stop()}}),e,this,[[8,19,23,31],[24,,26,30]])}))},{key:"getTransformedByOperation",value:function(t){switch(t.type){case"insert":return this._getTransformedByInsertOperation(t);case"move":case"remove":case"reinsert":return this._getTransformedByMoveOperation(t);case"split":return[this._getTransformedBySplitOperation(t)];case"merge":return[this._getTransformedByMergeOperation(t)]}return[new e(this.start,this.end)]}},{key:"getTransformedByOperations",value:function(t){var n=[new e(this.start,this.end)],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)for(var l=a.value,c=0;c<n.length;c++){var f=n[c].getTransformedByOperation(l);n.splice.apply(n,[c,1].concat(u(f))),c+=f.length-1}}catch(m){i=!0,o=m}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}for(var d=0;d<n.length;d++)for(var h=n[d],p=d+1;p<n.length;p++){var v=n[p];(h.containsRange(v)||v.containsRange(h)||h.isEqual(v))&&n.splice(p,1)}return n}},{key:"getCommonAncestor",value:function(){return this.start.getCommonAncestor(this.end)}},{key:"toJSON",value:function(){return{start:this.start.toJSON(),end:this.end.toJSON()}}},{key:"clone",value:function(){return new this.constructor(this.start,this.end)}},{key:"_getTransformedByInsertOperation",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1];return this._getTransformedByInsertion(e.position,e.howMany,t)}},{key:"_getTransformedByMoveOperation",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]&&arguments[1],n=e.sourcePosition,r=e.howMany,i=e.targetPosition;return this._getTransformedByMove(n,i,r,t)}},{key:"_getTransformedBySplitOperation",value:function(t){var n=this.start._getTransformedBySplitOperation(t),r=this.end._getTransformedBySplitOperation(t);return this.end.isEqual(t.insertionPosition)&&(r=this.end.getShiftedBy(1)),n.root!=r.root&&(r=this.end.getShiftedBy(-1)),new e(n,r)}},{key:"_getTransformedByMergeOperation",value:function(t){if(this.start.isEqual(t.targetPosition)&&this.end.isEqual(t.deletionPosition))return new e(this.start);var n=this.start._getTransformedByMergeOperation(t),r=this.end._getTransformedByMergeOperation(t);return n.root!=r.root&&(r=this.end.getShiftedBy(-1)),n.isAfter(r)?(t.sourcePosition.isBefore(t.targetPosition)?(n=to._createAt(r)).offset=0:(t.deletionPosition.isEqual(n)||(r=t.deletionPosition),n=t.targetPosition),new e(n,r)):new e(n,r)}},{key:"_getTransformedByInsertion",value:function(t,n){var r=arguments.length>2&&void 0!==arguments[2]&&arguments[2];if(r&&this.containsPosition(t))return[new e(this.start,t),new e(t.getShiftedBy(n),this.end._getTransformedByInsertion(t,n))];var i=new e(this.start,this.end);return i.start=i.start._getTransformedByInsertion(t,n),i.end=i.end._getTransformedByInsertion(t,n),[i]}},{key:"_getTransformedByMove",value:function(t,n,r){var i=arguments.length>3&&void 0!==arguments[3]&&arguments[3];if(this.isCollapsed){var o=this.start._getTransformedByMove(t,n,r);return[new e(o)]}var a,s=e._createFromPositionAndShift(t,r),l=n._getTransformedByDeletion(t,r);if(this.containsPosition(n)&&!i&&(s.containsPosition(this.start)||s.containsPosition(this.end))){var u=this.start._getTransformedByMove(t,n,r),c=this.end._getTransformedByMove(t,n,r);return[new e(u,c)]}var f=this.getDifference(s),d=null,h=this.getIntersection(s);if(1==f.length?d=new e(f[0].start._getTransformedByDeletion(t,r),f[0].end._getTransformedByDeletion(t,r)):2==f.length&&(d=new e(this.start,this.end._getTransformedByDeletion(t,r))),a=d?d._getTransformedByInsertion(l,r,null!==h||i):[],h){var p=new e(h.start._getCombined(s.start,l),h.end._getCombined(s.start,l));2==a.length?a.splice(1,0,p):a.push(p)}return a}},{key:"_getTransformedByDeletion",value:function(t,n){var r=this.start._getTransformedByDeletion(t,n),i=this.end._getTransformedByDeletion(t,n);return null==r&&null==i?null:(null==r&&(r=t),null==i&&(i=t),new e(r,i))}},{key:"isCollapsed",get:function(){return this.start.isEqual(this.end)}},{key:"isFlat",get:function(){return"same"==$t(this.start.getParentPath(),this.end.getParentPath())}},{key:"root",get:function(){return this.start.root}}],[{key:"_createFromPositionAndShift",value:function(e,t){var n=e,r=e.getShiftedBy(t);return t>0?new this(n,r):new this(r,n)}},{key:"_createIn",value:function(e){return new this(to._createAt(e,0),to._createAt(e,e.maxOffset))}},{key:"_createOn",value:function(e){return this._createFromPositionAndShift(to._createBefore(e),e.offsetSize)}},{key:"_createFromRanges",value:function(e){if(0===e.length)throw new It.b("range-create-from-ranges-empty-array: At least one range has to be passed.",null);if(1==e.length)return e[0].clone();var t=e[0];e.sort((function(e,t){return e.start.isAfter(t.start)?1:-1}));var n=e.indexOf(t),r=new this(t.start,t.end);if(n>0)for(var i=n-1;e[i].end.isEqual(r.start);i++)r.start=to._createAt(e[i].start);for(var o=n+1;o<e.length&&e[o].start.isEqual(r.end);o++)r.end=to._createAt(e[o].end);return r}},{key:"fromJSON",value:function(e,t){return new this(to.fromJSON(e.start,t),to.fromJSON(e.end,t))}}]),e}(),ro=function(){function e(){var t=this;f(this,e),this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._viewToModelLengthCallbacks=new Map,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set,this.on("modelToViewPosition",(function(e,n){if(!n.viewPosition){var r=t._modelToViewMapping.get(n.modelPosition.parent);n.viewPosition=t._findPositionIn(r,n.modelPosition.offset)}}),{priority:"low"}),this.on("viewToModelPosition",(function(e,n){if(!n.modelPosition){var r=t.findMappedViewAncestor(n.viewPosition),i=t._viewToModelMapping.get(r),o=t._toModelOffset(n.viewPosition.parent,n.viewPosition.offset,r);n.modelPosition=to._createAt(i,o)}}),{priority:"low"})}return d(e,[{key:"bindElements",value:function(e,t){this._modelToViewMapping.set(e,t),this._viewToModelMapping.set(t,e)}},{key:"unbindViewElement",value:function(e){var t=this.toModelElement(e);if(this._viewToModelMapping.delete(e),this._elementToMarkerNames.has(e)){var n=!0,r=!1,i=void 0;try{for(var o,a=this._elementToMarkerNames.get(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._unboundMarkerNames.add(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}this._modelToViewMapping.get(t)==e&&this._modelToViewMapping.delete(t)}},{key:"unbindModelElement",value:function(e){var t=this.toViewElement(e);this._modelToViewMapping.delete(e),this._viewToModelMapping.get(t)==e&&this._viewToModelMapping.delete(t)}},{key:"bindElementToMarker",value:function(e,t){var n=this._markerNameToElements.get(t)||new Set;n.add(e);var r=this._elementToMarkerNames.get(e)||new Set;r.add(t),this._markerNameToElements.set(t,n),this._elementToMarkerNames.set(e,r)}},{key:"unbindElementFromMarkerName",value:function(e,t){var n=this._markerNameToElements.get(t);n&&(n.delete(e),0==n.size&&this._markerNameToElements.delete(t));var r=this._elementToMarkerNames.get(e);r&&(r.delete(t),0==r.size&&this._elementToMarkerNames.delete(e))}},{key:"flushUnboundMarkerNames",value:function(){var e=Array.from(this._unboundMarkerNames);return this._unboundMarkerNames.clear(),e}},{key:"clearBindings",value:function(){this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set}},{key:"toModelElement",value:function(e){return this._viewToModelMapping.get(e)}},{key:"toViewElement",value:function(e){return this._modelToViewMapping.get(e)}},{key:"toModelRange",value:function(e){return new no(this.toModelPosition(e.start),this.toModelPosition(e.end))}},{key:"toViewRange",value:function(e){return new In(this.toViewPosition(e.start),this.toViewPosition(e.end))}},{key:"toModelPosition",value:function(e){var t={viewPosition:e,mapper:this};return this.fire("viewToModelPosition",t),t.modelPosition}},{key:"toViewPosition",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{isPhantom:!1},n={modelPosition:e,mapper:this,isPhantom:t.isPhantom};return this.fire("modelToViewPosition",n),n.viewPosition}},{key:"markerNameToElements",value:function(e){var t=this._markerNameToElements.get(e);if(!t)return null;var n=new Set,r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;if(l.is("attributeElement")){var u=!0,c=!1,f=void 0;try{for(var d,h=l.getElementsWithSameId()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;n.add(p)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}else n.add(l)}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"registerViewToModelLength",value:function(e,t){this._viewToModelLengthCallbacks.set(e,t)}},{key:"findMappedViewAncestor",value:function(e){for(var t=e.parent;!this._viewToModelMapping.has(t);)t=t.parent;return t}},{key:"_toModelOffset",value:function(e,t,n){if(n!=e)return this._toModelOffset(e.parent,e.index,n)+this._toModelOffset(e,t,e);if(e.is("text"))return t;for(var r=0,i=0;i<t;i++)r+=this.getModelLength(e.getChild(i));return r}},{key:"getModelLength",value:function(e){if(this._viewToModelLengthCallbacks.get(e.name))return this._viewToModelLengthCallbacks.get(e.name)(e);if(this._viewToModelMapping.has(e))return 1;if(e.is("text"))return e.data.length;if(e.is("uiElement"))return 0;var t=0,n=!0,r=!1,i=void 0;try{for(var o,a=e.getChildren()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t+=this.getModelLength(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"_findPositionIn",value:function(e,t){var n,r=0,i=0,o=0;if(e.is("text"))return new On(e,t);for(;i<t;)n=e.getChild(o),i+=r=this.getModelLength(n),o++;return i==t?this._moveViewPositionToTextNode(new On(e,o)):this._findPositionIn(n,t-(i-r))}},{key:"_moveViewPositionToTextNode",value:function(e){var t=e.nodeBefore,n=e.nodeAfter;return t instanceof Kt?new On(t,t.data.length):n instanceof Kt?new On(n,0):e}}]),e}();Yt(ro,zt);var io=function(){function e(){f(this,e),this._consumable=new Map,this._textProxyRegistry=new Map}return d(e,[{key:"add",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e)),this._consumable.has(e)||this._consumable.set(e,new Map),this._consumable.get(e).set(t,!0)}},{key:"consume",value:function(e,t){return t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e)),!!this.test(e,t)&&(this._consumable.get(e).set(t,!1),!0)}},{key:"test",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e));var n=this._consumable.get(e);if(void 0===n)return null;var r=n.get(t);return void 0===r?null:r}},{key:"revert",value:function(e,t){t=oo(t),e instanceof Ki&&(e=this._getSymbolForTextProxy(e));var n=this.test(e,t);return!1===n?(this._consumable.get(e).set(t,!0),!0):!0!==n&&null}},{key:"_getSymbolForTextProxy",value:function(e){var t=null,n=this._textProxyRegistry.get(e.startOffset);if(n){var r=n.get(e.endOffset);r&&(t=r.get(e.parent))}return t||(t=this._addSymbolForTextProxy(e.startOffset,e.endOffset,e.parent)),t}},{key:"_addSymbolForTextProxy",value:function(e,t,n){var r,i,o=Symbol("textProxySymbol");return(r=this._textProxyRegistry.get(e))||(r=new Map,this._textProxyRegistry.set(e,r)),(i=r.get(t))||(i=new Map,r.set(t,i)),i.set(n,o),o}}]),e}();function oo(e){var t=e.split(":");return t.length>1?t[0]+":"+t[1]:t[0]}var ao=function(){function e(t){f(this,e),this.conversionApi=mn({dispatcher:this},t)}return d(e,[{key:"convertChanges",value:function(e,t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=e.getMarkersToRemove()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;this.convertMarkerRemove(l.name,l.range,n)}}catch(A){i=!0,o=A}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var u=!0,c=!1,f=void 0;try{for(var d,h=e.getChanges()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;"insert"==p.type?this.convertInsert(no._createFromPositionAndShift(p.position,p.length),n):"remove"==p.type?this.convertRemove(p.position,p.length,p.name,n):this.convertAttribute(p.range,p.attributeKey,p.attributeOldValue,p.attributeNewValue,n)}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}var v=!0,m=!1,g=void 0;try{for(var y,b=this.conversionApi.mapper.flushUnboundMarkerNames()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value,w=t.get(k).getRange();this.convertMarkerRemove(k,w,n),this.convertMarkerAdd(k,w,n)}}catch(A){m=!0,g=A}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}var _=!0,x=!1,T=void 0;try{for(var C,S=e.getMarkersToAdd()[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;this.convertMarkerAdd(E.name,E.range,n)}}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}}},{key:"convertInsert",value:function(e,t){this.conversionApi.writer=t,this.conversionApi.consumable=this._createInsertConsumable(e);var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=s.item,u={item:l,range:no._createFromPositionAndShift(s.previousPosition,s.length)};this._testAndFire("insert",u);var c=!0,f=!1,d=void 0;try{for(var h,p=l.getAttributeKeys()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;u.attributeKey=v,u.attributeOldValue=null,u.attributeNewValue=l.getAttribute(v),this._testAndFire("attribute:".concat(v),u)}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}catch(m){r=!0,i=m}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._clearConversionApi()}},{key:"convertRemove",value:function(e,t,n,r){this.conversionApi.writer=r,this.fire("remove:"+n,{position:e,length:t},this.conversionApi),this._clearConversionApi()}},{key:"convertAttribute",value:function(e,t,n,r,i){this.conversionApi.writer=i,this.conversionApi.consumable=this._createConsumableForRange(e,"attribute:".concat(t));var o=!0,a=!1,s=void 0;try{for(var l,u=e[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f={item:c.item,range:no._createFromPositionAndShift(c.previousPosition,c.length),attributeKey:t,attributeOldValue:n,attributeNewValue:r};this._testAndFire("attribute:".concat(t),f)}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}this._clearConversionApi()}},{key:"convertSelection",value:function(e,t,n){var r=Array.from(t.getMarkersAtPosition(e.getFirstPosition()));if(this.conversionApi.writer=n,this.conversionApi.consumable=this._createSelectionConsumable(e,r),this.fire("selection",{selection:e},this.conversionApi),e.isCollapsed){var i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=u.getRange();if(so(e.getFirstPosition(),u,this.conversionApi.mapper)){var f={item:e,markerName:u.name,markerRange:c};this.conversionApi.consumable.test(e,"addMarker:"+u.name)&&this.fire("addMarker:"+u.name,f,this.conversionApi)}}}catch(b){o=!0,a=b}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var d=!0,h=!1,p=void 0;try{for(var v,m=e.getAttributeKeys()[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value,y={item:e,range:e.getFirstRange(),attributeKey:g,attributeOldValue:null,attributeNewValue:e.getAttribute(g)};this.conversionApi.consumable.test(e,"attribute:"+y.attributeKey)&&this.fire("attribute:"+y.attributeKey+":$text",y,this.conversionApi)}}catch(b){h=!0,p=b}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}this._clearConversionApi()}}},{key:"convertMarkerAdd",value:function(e,t,n){if(t.root.document&&"$graveyard"!=t.root.rootName){this.conversionApi.writer=n;var r="addMarker:"+e,i=new io;if(i.add(t,r),this.conversionApi.consumable=i,this.fire(r,{markerName:e,markerRange:t},this.conversionApi),i.test(t,r)){this.conversionApi.consumable=this._createConsumableForRange(t,r);var o=!0,a=!1,s=void 0;try{for(var l,u=t.getItems()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if(this.conversionApi.consumable.test(c,r)){var f={item:c,range:no._createOn(c),markerName:e,markerRange:t};this.fire(r,f,this.conversionApi)}}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}this._clearConversionApi()}}}},{key:"convertMarkerRemove",value:function(e,t,n){t.root.document&&"$graveyard"!=t.root.rootName&&(this.conversionApi.writer=n,this.fire("removeMarker:"+e,{markerName:e,markerRange:t},this.conversionApi),this._clearConversionApi())}},{key:"_createInsertConsumable",value:function(e){var t=new io,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value.item;t.add(s,"insert");var l=!0,u=!1,c=void 0;try{for(var f,d=s.getAttributeKeys()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;t.add(s,"attribute:"+h)}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}catch(p){r=!0,i=p}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"_createConsumableForRange",value:function(e,t){var n=new io,r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;n.add(l,t)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"_createSelectionConsumable",value:function(e,t){var n=new io;n.add(e,"selection");var r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;n.add(e,"addMarker:"+l.name)}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var u=!0,c=!1,f=void 0;try{for(var d,h=e.getAttributeKeys()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;n.add(e,"attribute:"+p)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}return n}},{key:"_testAndFire",value:function(e,t){if(this.conversionApi.consumable.test(t.item,e)){var n=t.item.name||"$text";this.fire(e+":"+n,t,this.conversionApi)}}},{key:"_clearConversionApi",value:function(){delete this.conversionApi.writer,delete this.conversionApi.consumable}}]),e}();function so(e,t,n){var r=t.getRange(),i=Array.from(e.getAncestors());return i.shift(),i.reverse(),!i.some((function(e){if(r.containsItem(e))return!!n.toViewElement(e).getCustomProperty("addHighlight")}))}Yt(ao,zt);var lo=function(){function e(t,n,r){f(this,e),this._lastRangeBackward=!1,this._ranges=[],this._attrs=new Map,t&&this.setTo(t,n,r)}return d(e,[{key:"isEqual",value:function(e){if(this.rangeCount!=e.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(e.anchor)||!this.focus.isEqual(e.focus))return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=!1,l=!0,u=!1,c=void 0;try{for(var f,d=e._ranges[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(a.isEqual(h)){s=!0;break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}if(!s)return!1}}catch(p){n=!0,r=p}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}},{key:"getRanges",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._ranges[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,new no(a.start,a.end);case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"getFirstRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.start.isBefore(e.start)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?new no(e.start,e.end):null}},{key:"getLastRange",value:function(){var e=null,t=!0,n=!1,r=void 0;try{for(var i,o=this._ranges[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e&&!a.end.isAfter(e.end)||(e=a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e?new no(e.start,e.end):null}},{key:"getFirstPosition",value:function(){var e=this.getFirstRange();return e?e.start.clone():null}},{key:"getLastPosition",value:function(){var e=this.getLastRange();return e?e.end.clone():null}},{key:"setTo",value:function(t,n,r){if(null===t)this._setRanges([]);else if(t instanceof e)this._setRanges(t.getRanges(),t.isBackward);else if(t&&"function"==typeof t.getRanges)this._setRanges(t.getRanges(),t.isBackward);else if(t instanceof no)this._setRanges([t],!!n&&!!n.backward);else if(t instanceof to)this._setRanges([new no(t)]);else if(t instanceof Gi){var i,o=!!r&&!!r.backward;if("in"==n)i=no._createIn(t);else if("on"==n)i=no._createOn(t);else{if(void 0===n)throw new It.b("model-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",[this,t]);i=new no(to._createAt(t,n))}this._setRanges([i],o)}else{if(!Zt(t))throw new It.b("model-selection-setTo-not-selectable: Cannot set the selection to the given place.",[this,t]);this._setRanges(t,n&&!!n.backward)}}},{key:"_setRanges",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]&&arguments[1],r=(e=Array.from(e)).some((function(n){if(!(n instanceof no))throw new It.b("model-selection-set-ranges-not-range: Selection range set to an object that is not an instance of model.Range.",[t,e]);return t._ranges.every((function(e){return!e.isEqual(n)}))}));if(e.length!==this._ranges.length||r){this._removeAllRanges();var i=!0,o=!1,a=void 0;try{for(var s,l=e[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;this._pushRange(u)}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}this._lastRangeBackward=!!n,this.fire("change:range",{directChange:!0})}}},{key:"setFocus",value:function(e,t){if(null===this.anchor)throw new It.b("model-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",[this,e]);var n=to._createAt(e,t);if("same"!=n.compareWith(this.focus)){var r=this.anchor;this._ranges.length&&this._popRange(),"before"==n.compareWith(r)?(this._pushRange(new no(n,r)),this._lastRangeBackward=!0):(this._pushRange(new no(r,n)),this._lastRangeBackward=!1),this.fire("change:range",{directChange:!0})}}},{key:"getAttribute",value:function(e){return this._attrs.get(e)}},{key:"getAttributes",value:function(){return this._attrs.entries()}},{key:"getAttributeKeys",value:function(){return this._attrs.keys()}},{key:"hasAttribute",value:function(e){return this._attrs.has(e)}},{key:"removeAttribute",value:function(e){this.hasAttribute(e)&&(this._attrs.delete(e),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}},{key:"setAttribute",value:function(e,t){this.getAttribute(e)!==t&&(this._attrs.set(e,t),this.fire("change:attribute",{attributeKeys:[e],directChange:!0}))}},{key:"getSelectedElement",value:function(){if(1!==this.rangeCount)return null;var e=this.getFirstRange(),t=e.start.nodeAfter,n=e.end.nodeBefore;return t instanceof Xi&&t==n?t:null}},{key:"is",value:function(e){return"selection"==e||"model:selection"==e}},{key:"getSelectedBlocks",value:s.mark((function e(){var t,n,r,i,o,a,l,u,c,f,d,h,p,v,m,g;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=new WeakSet,n=!0,r=!1,i=void 0,e.prev=4,o=this.getRanges()[Symbol.iterator]();case 6:if(n=(a=o.next()).done){e.next=50;break}if(l=a.value,u=fo(l.start,t),e.t0=u&&ho(u,l),!e.t0){e.next=13;break}return e.next=13,u;case 13:c=!0,f=!1,d=void 0,e.prev=16,h=l.getWalker()[Symbol.iterator]();case 18:if(c=(p=h.next()).done){e.next=28;break}if(v=p.value,m=v.item,e.t1="elementEnd"==v.type&&co(m,t,l),!e.t1){e.next=25;break}return e.next=25,m;case 25:c=!0,e.next=18;break;case 28:e.next=34;break;case 30:e.prev=30,e.t2=e.catch(16),f=!0,d=e.t2;case 34:e.prev=34,e.prev=35,c||null==h.return||h.return();case 37:if(e.prev=37,!f){e.next=40;break}throw d;case 40:return e.finish(37);case 41:return e.finish(34);case 42:if(g=fo(l.end,t),e.t3=g&&!l.end.isTouching(to._createAt(g,0))&&ho(g,l),!e.t3){e.next=47;break}return e.next=47,g;case 47:n=!0,e.next=6;break;case 50:e.next=56;break;case 52:e.prev=52,e.t4=e.catch(4),r=!0,i=e.t4;case 56:e.prev=56,e.prev=57,n||null==o.return||o.return();case 59:if(e.prev=59,!r){e.next=62;break}throw i;case 62:return e.finish(59);case 63:return e.finish(56);case 64:case"end":return e.stop()}}),e,this,[[4,52,56,64],[16,30,34,42],[35,,37,41],[57,,59,63]])}))},{key:"containsEntireContent",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:this.anchor.root,t=to._createAt(e,0),n=to._createAt(e,"end");return t.isTouching(this.getFirstPosition())&&n.isTouching(this.getLastPosition())}},{key:"_pushRange",value:function(e){this._checkRange(e),this._ranges.push(new no(e.start,e.end))}},{key:"_checkRange",value:function(e){for(var t=0;t<this._ranges.length;t++)if(e.isIntersecting(this._ranges[t]))throw new It.b("model-selection-range-intersects: Trying to add a range that intersects with another range in the selection.",[this,e],{addedRange:e,intersectingRange:this._ranges[t]})}},{key:"_removeAllRanges",value:function(){for(;this._ranges.length>0;)this._popRange()}},{key:"_popRange",value:function(){this._ranges.pop()}},{key:"anchor",get:function(){if(this._ranges.length>0){var e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.end:e.start}return null}},{key:"focus",get:function(){if(this._ranges.length>0){var e=this._ranges[this._ranges.length-1];return this._lastRangeBackward?e.start:e.end}return null}},{key:"isCollapsed",get:function(){return 1===this._ranges.length&&this._ranges[0].isCollapsed}},{key:"rangeCount",get:function(){return this._ranges.length}},{key:"isBackward",get:function(){return!this.isCollapsed&&this._lastRangeBackward}}]),e}();function uo(e,t){return!t.has(e)&&(t.add(e),e.document.model.schema.isBlock(e)&&e.parent)}function co(e,t,n){return uo(e,t)&&ho(e,n)}function fo(e,t){var n=e.parent.document.model.schema,r=e.parent.getAncestors({parentFirst:!0,includeSelf:!0}),i=!1,o=r.find((function(e){return!i&&!(i=n.isLimit(e))&&uo(e,t)}));return r.forEach((function(e){return t.add(e)})),o}function ho(e,t){var n=function(e){for(var t=e.document.model.schema,n=e.parent;n;){if(t.isBlock(n))return n;n=n.parent}}(e);return!n||!t.containsRange(no._createOn(n),!0)}Yt(lo,zt);var po=function(e){function t(e,n){var r;return f(this,t),r=h(this,p(t).call(this,e,n)),vo.call(o(r)),r}return v(t,e),d(t,[{key:"detach",value:function(){this.stopListening()}},{key:"is",value:function(e){return"liveRange"==e||"model:liveRange"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toRange",value:function(){return new no(this.start,this.end)}}],[{key:"fromRange",value:function(e){return new t(e.start,e.end)}}]),t}(no);function vo(){var e=this;this.listenTo(this.root.document.model,"applyOperation",(function(t,n){var r=n[0];r.isDocumentOperation&&mo.call(e,r)}),{priority:"low"})}function mo(e){var t=this.getTransformedByOperation(e),n=no._createFromRanges(t),r=!n.isEqual(this),i=function(e,t){switch(t.type){case"insert":return e.containsPosition(t.position);case"move":case"remove":case"reinsert":case"merge":return e.containsPosition(t.sourcePosition)||e.start.isEqual(t.sourcePosition)||e.containsPosition(t.targetPosition);case"split":return e.containsPosition(t.splitPosition)||e.containsPosition(t.insertionPosition)}return!1}(this,e),o=null;if(r){"$graveyard"==n.root.rootName&&(o="remove"==e.type?e.sourcePosition:e.deletionPosition);var a=this.toRange();this.start=n.start,this.end=n.end,this.fire("change:range",a,{deletionPosition:o})}else i&&this.fire("change:content",this.toRange(),{deletionPosition:o})}Yt(po,zt);var go="selection:",yo=function(){function e(t){f(this,e),this._selection=new bo(t),this._selection.delegate("change:range").to(this),this._selection.delegate("change:attribute").to(this)}return d(e,[{key:"getRanges",value:function(){return this._selection.getRanges()}},{key:"getFirstPosition",value:function(){return this._selection.getFirstPosition()}},{key:"getLastPosition",value:function(){return this._selection.getLastPosition()}},{key:"getFirstRange",value:function(){return this._selection.getFirstRange()}},{key:"getLastRange",value:function(){return this._selection.getLastRange()}},{key:"getSelectedBlocks",value:function(){return this._selection.getSelectedBlocks()}},{key:"getSelectedElement",value:function(){return this._selection.getSelectedElement()}},{key:"containsEntireContent",value:function(e){return this._selection.containsEntireContent(e)}},{key:"destroy",value:function(){this._selection.destroy()}},{key:"getAttributeKeys",value:function(){return this._selection.getAttributeKeys()}},{key:"getAttributes",value:function(){return this._selection.getAttributes()}},{key:"getAttribute",value:function(e){return this._selection.getAttribute(e)}},{key:"hasAttribute",value:function(e){return this._selection.hasAttribute(e)}},{key:"refresh",value:function(){this._selection._updateMarkers(),this._selection._updateAttributes(!1)}},{key:"is",value:function(e){return"selection"==e||"model:selection"==e||"documentSelection"==e||"model:documentSelection"==e}},{key:"_setFocus",value:function(e,t){this._selection.setFocus(e,t)}},{key:"_setTo",value:function(e,t,n){this._selection.setTo(e,t,n)}},{key:"_setAttribute",value:function(e,t){this._selection.setAttribute(e,t)}},{key:"_removeAttribute",value:function(e){this._selection.removeAttribute(e)}},{key:"_getStoredAttributes",value:function(){return this._selection._getStoredAttributes()}},{key:"_overrideGravity",value:function(){return this._selection.overrideGravity()}},{key:"_restoreGravity",value:function(e){this._selection.restoreGravity(e)}},{key:"isCollapsed",get:function(){return this._selection.isCollapsed}},{key:"anchor",get:function(){return this._selection.anchor}},{key:"focus",get:function(){return this._selection.focus}},{key:"rangeCount",get:function(){return this._selection.rangeCount}},{key:"hasOwnRange",get:function(){return this._selection.hasOwnRange}},{key:"isBackward",get:function(){return this._selection.isBackward}},{key:"isGravityOverridden",get:function(){return this._selection.isGravityOverridden}},{key:"markers",get:function(){return this._selection.markers}},{key:"_ranges",get:function(){return this._selection._ranges}}],[{key:"_getStoreAttributeKey",value:function(e){return go+e}},{key:"_isStoreAttributeKey",value:function(e){return e.startsWith(go)}}]),e}();Yt(yo,zt);var bo=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this))).markers=new Fn({idProperty:"name"}),n._model=e.model,n._document=e,n._attributePriority=new Map,n._fixGraveyardRangesData=[],n._hasChangedRange=!1,n._overriddenGravityRegister=new Set,n.listenTo(n._model,"applyOperation",(function(e,t){var r=t[0];if(r.isDocumentOperation&&"marker"!=r.type&&"rename"!=r.type&&"noop"!=r.type){for(;n._fixGraveyardRangesData.length;){var i=n._fixGraveyardRangesData.shift(),o=i.liveRange,a=i.sourcePosition;n._fixGraveyardSelection(o,a)}n._hasChangedRange&&(n._hasChangedRange=!1,n.fire("change:range",{directChange:!1}))}}),{priority:"lowest"}),n.on("change:range",(function(){var e=!0,t=!1,r=void 0;try{for(var i,a=n.getRanges()[Symbol.iterator]();!(e=(i=a.next()).done);e=!0){var s=i.value;if(!n._document._validateSelectionRange(s))throw new It.b("document-selection-wrong-position: Range from document selection starts or ends at incorrect position.",o(n),{range:s})}}catch(l){t=!0,r=l}finally{try{e||null==a.return||a.return()}finally{if(t)throw r}}})),n.listenTo(n._model.markers,"update",(function(){return n._updateMarkers()})),n.listenTo(n._document,"change",(function(e,t){!function(e,t){var n=e.document.differ,r=!0,i=!1,o=void 0;try{for(var a,s=function(){var n=a.value;if("insert"!=n.type)return"continue";var r=n.position.parent;n.length===r.maxOffset&&e.enqueueChange(t,(function(e){var t=Array.from(r.getAttributeKeys()).filter((function(e){return e.startsWith(go)})),n=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(n=(a=s.next()).done);n=!0){var l=a.value;e.removeAttribute(l,r)}}catch(u){i=!0,o=u}finally{try{n||null==s.return||s.return()}finally{if(i)throw o}}}))},l=n.getChanges()[Symbol.iterator]();!(r=(a=l.next()).done);r=!0)s()}catch(u){i=!0,o=u}finally{try{r||null==l.return||l.return()}finally{if(i)throw o}}}(n._model,t)})),n}return v(t,e),d(t,[{key:"destroy",value:function(){for(var e=0;e<this._ranges.length;e++)this._ranges[e].detach();this.stopListening()}},{key:"getRanges",value:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(!this._ranges.length){e.next=4;break}return e.delegateYield(l(p(t.prototype),"getRanges",this).call(this),"t0",2);case 2:e.next=6;break;case 4:return e.next=6,this._document._getDefaultRange();case 6:case"end":return e.stop()}}),e,this)}))},{key:"getFirstRange",value:function(){return l(p(t.prototype),"getFirstRange",this).call(this)||this._document._getDefaultRange()}},{key:"getLastRange",value:function(){return l(p(t.prototype),"getLastRange",this).call(this)||this._document._getDefaultRange()}},{key:"setTo",value:function(e,n,r){l(p(t.prototype),"setTo",this).call(this,e,n,r),this._updateAttributes(!0)}},{key:"setFocus",value:function(e,n){l(p(t.prototype),"setFocus",this).call(this,e,n),this._updateAttributes(!0)}},{key:"setAttribute",value:function(e,t){if(this._setAttribute(e,t)){var n=[e];this.fire("change:attribute",{attributeKeys:n,directChange:!0})}}},{key:"removeAttribute",value:function(e){if(this._removeAttribute(e)){var t=[e];this.fire("change:attribute",{attributeKeys:t,directChange:!0})}}},{key:"overrideGravity",value:function(){var e=Rt();return this._overriddenGravityRegister.add(e),1===this._overriddenGravityRegister.size&&this._updateAttributes(!0),e}},{key:"restoreGravity",value:function(e){if(!this._overriddenGravityRegister.has(e))throw new It.b("document-selection-gravity-wrong-restore: Attempting to restore the selection gravity for an unknown UID.",this,{uid:e});this._overriddenGravityRegister.delete(e),this.isGravityOverridden||this._updateAttributes(!0)}},{key:"_popRange",value:function(){this._ranges.pop().detach()}},{key:"_pushRange",value:function(e){var t=this._prepareRange(e);t&&this._ranges.push(t)}},{key:"_prepareRange",value:function(e){var t=this;if(this._checkRange(e),e.root!=this._document.graveyard){var n=po.fromRange(e);return n.on("change:range",(function(e,r,i){t._hasChangedRange=!0,n.root==t._document.graveyard&&t._fixGraveyardRangesData.push({liveRange:n,sourcePosition:i.deletionPosition})})),n}}},{key:"_updateMarkers",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._model.markers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.getRange(),l=!0,u=!1,c=void 0;try{for(var f,d=this.getRanges()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;s.containsRange(h,!h.isCollapsed)&&e.push(a)}}catch(k){u=!0,c=k}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}}catch(k){n=!0,r=k}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}for(var p=0,v=e;p<v.length;p++){var m=v[p];this.markers.has(m)||this.markers.add(m)}for(var g=0,y=Array.from(this.markers);g<y.length;g++){var b=y[g];e.includes(b)||this.markers.remove(b)}}},{key:"_updateAttributes",value:function(e){var t=$i(this._getSurroundingAttributes()),n=$i(this.getAttributes());if(e)this._attributePriority=new Map,this._attrs=new Map;else{var r=!0,i=!1,o=void 0;try{for(var a,s=this._attributePriority[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=c(l,2),f=u[0];"low"==u[1]&&(this._attrs.delete(f),this._attributePriority.delete(f))}}catch(P){i=!0,o=P}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}this._setAttributesTo(t);var d=[],h=!0,p=!1,v=void 0;try{for(var m,g=this.getAttributes()[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=c(y,2),k=b[0],w=b[1];n.has(k)&&n.get(k)===w||d.push(k)}}catch(P){p=!0,v=P}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}var _=!0,x=!1,T=void 0;try{for(var C,S=n[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value,A=c(E,1)[0];this.hasAttribute(A)||d.push(A)}}catch(P){x=!0,T=P}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}d.length>0&&this.fire("change:attribute",{attributeKeys:d,directChange:!1})}},{key:"_setAttribute",value:function(e,n){var r=!(arguments.length>2&&void 0!==arguments[2])||arguments[2],i=r?"normal":"low";return("low"!=i||"normal"!=this._attributePriority.get(e))&&l(p(t.prototype),"getAttribute",this).call(this,e)!==n&&(this._attrs.set(e,n),this._attributePriority.set(e,i),!0)}},{key:"_removeAttribute",value:function(e){var n=!(arguments.length>1&&void 0!==arguments[1])||arguments[1],r=n?"normal":"low";return("low"!=r||"normal"!=this._attributePriority.get(e))&&(this._attributePriority.set(e,r),!!l(p(t.prototype),"hasAttribute",this).call(this,e)&&(this._attrs.delete(e),!0))}},{key:"_setAttributesTo",value:function(e){var t=new Set,n=!0,r=!1,i=void 0;try{for(var o,a=this.getAttributes()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];e.get(u)!==f&&this._removeAttribute(u,!1)}}catch(w){r=!0,i=w}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}var d=!0,h=!1,p=void 0;try{for(var v,m=e[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value,y=c(g,2),b=y[0],k=y[1];this._setAttribute(b,k,!1)&&t.add(b)}}catch(w){h=!0,p=w}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}return t}},{key:"_getStoredAttributes",value:s.mark((function e(){var t,n,r,i,o,a,l,u;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:if(t=this.getFirstPosition().parent,!this.isCollapsed||!t.isEmpty){e.next=30;break}n=!0,r=!1,i=void 0,e.prev=5,o=t.getAttributeKeys()[Symbol.iterator]();case 7:if(n=(a=o.next()).done){e.next=16;break}if(!(l=a.value).startsWith(go)){e.next=13;break}return u=l.substr(go.length),e.next=13,[u,t.getAttribute(l)];case 13:n=!0,e.next=7;break;case 16:e.next=22;break;case 18:e.prev=18,e.t0=e.catch(5),r=!0,i=e.t0;case 22:e.prev=22,e.prev=23,n||null==o.return||o.return();case 25:if(e.prev=25,!r){e.next=28;break}throw i;case 28:return e.finish(25);case 29:return e.finish(22);case 30:case"end":return e.stop()}}),e,this,[[5,18,22,30],[23,,25,29]])}))},{key:"_getSurroundingAttributes",value:function(){var e=this.getFirstPosition(),t=this._model.schema,n=null;if(this.isCollapsed){var r=e.textNode?e.textNode:e.nodeBefore,i=e.textNode?e.textNode:e.nodeAfter;if(this.isGravityOverridden||(n=ko(r)),n||(n=ko(i)),!this.isGravityOverridden&&!n)for(var o=r;o&&!n;)n=ko(o=o.previousSibling);if(!n)for(var a=i;a&&!n;)n=ko(a=a.nextSibling);n||(n=this._getStoredAttributes())}else{var s=this.getFirstRange(),l=!0,u=!1,c=void 0;try{for(var f,d=s[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value;if(h.item.is("element")&&t.isObject(h.item))break;if("text"==h.type){n=h.item.getAttributes();break}}}catch(p){u=!0,c=p}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}return n}},{key:"_fixGraveyardSelection",value:function(e,t){var n=t.clone(),r=this._model.schema.getNearestSelectionRange(n),i=this._ranges.indexOf(e);if(this._ranges.splice(i,1),e.detach(),r){var o=this._prepareRange(r);this._ranges.splice(i,0,o)}}},{key:"isCollapsed",get:function(){return 0===this._ranges.length?this._document._getDefaultRange().isCollapsed:l(p(t.prototype),"isCollapsed",this)}},{key:"anchor",get:function(){return l(p(t.prototype),"anchor",this)||this._document._getDefaultRange().start}},{key:"focus",get:function(){return l(p(t.prototype),"focus",this)||this._document._getDefaultRange().end}},{key:"rangeCount",get:function(){return this._ranges.length?this._ranges.length:1}},{key:"hasOwnRange",get:function(){return this._ranges.length>0}},{key:"isGravityOverridden",get:function(){return!!this._overriddenGravityRegister.size}}]),t}(lo);function ko(e){return e instanceof Ki||e instanceof Qi?e.getAttributes():null}var wo=function(){function e(t){f(this,e),this._dispatchers=t}return d(e,[{key:"add",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._dispatchers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0)e(i.value)}catch(a){n=!0,r=a}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return this}}]),e}(),_o=function(e){return At(e,5)},xo=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"elementToElement",value:function(e){return this.add(function(e){return(e=_o(e)).view=Co(e.view,"container"),function(t){t.on("insert:"+e.model,function(e){return function(t,n,r){var i=e(n.item,r.writer);if(i&&r.consumable.consume(n.item,"insert")){var o=r.mapper.toViewPosition(n.range.start);r.mapper.bindElements(n.item,i),r.writer.insert(o,i)}}}(e.view),{priority:e.converterPriority||"normal"})}}(e))}},{key:"attributeToElement",value:function(e){return this.add(function(e){var t="attribute:"+((e=_o(e)).model.key?e.model.key:e.model);if(e.model.name&&(t+=":"+e.model.name),e.model.values){var n=!0,r=!1,i=void 0;try{for(var o,a=e.model.values[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.view[s]=Co(e.view[s],"attribute")}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}else e.view=Co(e.view,"attribute");var l=So(e);return function(n){n.on(t,function(e){return function(t,n,r){var i=e(n.attributeOldValue,r.writer),o=e(n.attributeNewValue,r.writer);if((i||o)&&r.consumable.consume(n.item,t.name)){var a=r.writer,s=a.document.selection;if(n.item instanceof lo||n.item instanceof yo)a.wrap(s.getFirstRange(),o);else{var l=r.mapper.toViewRange(n.range);null!==n.attributeOldValue&&i&&(l=a.unwrap(l,i)),null!==n.attributeNewValue&&o&&a.wrap(l,o)}}}}(l),{priority:e.converterPriority||"normal"})}}(e))}},{key:"attributeToAttribute",value:function(e){return this.add(function(e){var t="attribute:"+((e=_o(e)).model.key?e.model.key:e.model);if(e.model.name&&(t+=":"+e.model.name),e.model.values){var n=!0,r=!1,i=void 0;try{for(var o,a=e.model.values[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;e.view[s]=Eo(e.view[s])}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}else e.view=Eo(e.view);var l=So(e);return function(n){n.on(t,function(e){return function(t,n,r){var i=e(n.attributeOldValue,n),o=e(n.attributeNewValue,n);if((i||o)&&r.consumable.consume(n.item,t.name)){var a=r.mapper.toViewElement(n.item),s=r.writer;if(!a)throw new It.b("conversion-attribute-to-attribute-on-text: Trying to convert text node's attribute with attribute-to-attribute converter.",[n,r]);if(null!==n.attributeOldValue&&i)if("class"==i.key){var l=Array.isArray(i.value)?i.value:[i.value],c=!0,f=!1,d=void 0;try{for(var h,p=l[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;s.removeClass(v,a)}}catch(u){f=!0,d=u}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}else if("style"==i.key)for(var m=0,g=Object.keys(i.value);m<g.length;m++){var y=g[m];s.removeStyle(y,a)}else s.removeAttribute(i.key,a);if(null!==n.attributeNewValue&&o)if("class"==o.key){var b=Array.isArray(o.value)?o.value:[o.value],k=!0,w=!1,_=void 0;try{for(var x,T=b[Symbol.iterator]();!(k=(x=T.next()).done);k=!0){var C=x.value;s.addClass(C,a)}}catch(u){w=!0,_=u}finally{try{k||null==T.return||T.return()}finally{if(w)throw _}}}else if("style"==o.key)for(var S=0,E=Object.keys(o.value);S<E.length;S++){var A=E[S];s.setStyle(A,o.value[A],a)}else s.setAttribute(o.key,o.value,a)}}}(l),{priority:e.converterPriority||"normal"})}}(e))}},{key:"markerToElement",value:function(e){return this.add(function(e){return(e=_o(e)).view=Co(e.view,"ui"),function(t){t.on("addMarker:"+e.model,function(e){return function(t,n,r){n.isOpening=!0;var i=e(n,r.writer);n.isOpening=!1;var o=e(n,r.writer);if(i&&o){var a=n.markerRange;if(!a.isCollapsed||r.consumable.consume(a,t.name)){var s=!0,l=!1,u=void 0;try{for(var c,f=a[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;if(!r.consumable.consume(d.item,t.name))return}}catch(v){l=!0,u=v}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}var h=r.mapper,p=r.writer;p.insert(h.toViewPosition(a.start),i),r.mapper.bindElementToMarker(i,n.markerName),a.isCollapsed||(p.insert(h.toViewPosition(a.end),o),r.mapper.bindElementToMarker(o,n.markerName)),t.stop()}}}}(e.view),{priority:e.converterPriority||"normal"}),t.on("removeMarker:"+e.model,(e.view,function(e,t,n){var r=n.mapper.markerNameToElements(t.markerName);if(r){var i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;n.mapper.unbindElementFromMarkerName(u,t.markerName),n.writer.clear(n.writer.createRangeOn(u),u)}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}n.writer.clearClonedElementsGroup(t.markerName),e.stop()}}),{priority:e.converterPriority||"normal"})}}(e))}},{key:"markerToHighlight",value:function(e){return this.add(function(e){return 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l,c=s.allowAttributes;(l=e[t].allowAttributes).push.apply(l,u(c))}}}catch(f){r=!0,i=f}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}delete e[t].allowAttributesOf}function Go(e,t){var n=e[t],r=!0,i=!1,o=void 0;try{for(var a,s=n.inheritTypesFrom[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=e[a.value];if(l){var u=Object.keys(l).filter((function(e){return e.startsWith("is")})),c=!0,f=!1,d=void 0;try{for(var h,p=u[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;v in n||(n[v]=l[v])}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}}catch(m){i=!0,o=m}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}delete n.inheritTypesFrom}function Qo(e,t){var n=e[t],r=n.allowIn.filter((function(t){return e[t]}));n.allowIn=Array.from(new Set(r))}function Ko(e,t){var n=e[t];n.allowAttributes=Array.from(new Set(n.allowAttributes))}function Jo(e,t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l,c=a.value;"string"==typeof c[n]?t[n].push(c[n]):Array.isArray(c[n])&&(l=t[n]).push.apply(l,u(c[n]))}}catch(f){i=!0,o=f}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}function Xo(e,t){var n,r=e[t];return(n=e,Object.keys(n).map((function(e){return n[e]}))).filter((function(e){return e.allowIn.includes(r.name)}))}function Zo(e){return"string"==typeof e?{name:e,getAttributeKeys:s.mark((function e(){return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:case"end":return e.stop()}}),e)})),getAttribute:function(){}}:{name:e.is("element")?e.name:"$text",getAttributeKeys:s.mark((function t(){return s.wrap((function(t){for(;;)switch(t.prev=t.next){case 0:return t.delegateYield(e.getAttributeKeys(),"t0",1);case 1:case"end":return t.stop()}}),t)})),getAttribute:function(t){return e.getAttribute(t)}}}function ea(e,t,n){var r=!0,i=!1,o=void 0;try{for(var a,s=t.getAttributeKeys()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;e.checkAttribute(t,l)||n.removeAttribute(l,t)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}var ta=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};f(this,e),this._splitParts=new Map,this._modelCursor=null,this.conversionApi=Object.assign({},t),this.conversionApi.convertItem=this._convertItem.bind(this),this.conversionApi.convertChildren=this._convertChildren.bind(this),this.conversionApi.splitToAllowedParent=this._splitToAllowedParent.bind(this),this.conversionApi.getSplitParts=this._getSplitParts.bind(this)}return d(e,[{key:"convert",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:["$root"];this.fire("viewCleanup",e),this._modelCursor=function(e,t){var n,r=!0,i=!1,o=void 0;try{for(var a,s=new Ho(e)[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u={},c=!0,f=!1,d=void 0;try{for(var h,p=l.getAttributeKeys()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;u[v]=l.getAttribute(v)}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}var m=t.createElement(l.name,u);n&&t.append(m,n),n=to._createAt(m,0)}}catch(g){i=!0,o=g}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}(n,t),this.conversionApi.writer=t,this.conversionApi.consumable=Vo.createFrom(e),this.conversionApi.store={};var r=this._convertItem(e,this._modelCursor),i=r.modelRange,o=t.createDocumentFragment();if(i){this._removeEmptyElements();for(var a=0,s=Array.from(this._modelCursor.parent.getChildren());a<s.length;a++){var l=s[a];t.append(l,o)}o.markers=function(e,t){var n=new Set,r=new Map,i=no._createIn(e).getItems(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;"$marker"==c.name&&n.add(c)}}catch(b){a=!0,s=b}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}var f=!0,d=!1,h=void 0;try{for(var p,v=n[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value,g=m.getAttribute("data-name"),y=t.createPositionBefore(m);r.has(g)?r.get(g).end=y.clone():r.set(g,new no(y.clone())),t.remove(m)}}catch(b){d=!0,h=b}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}return r}(o,t)}return this._modelCursor=null,this._splitParts.clear(),this.conversionApi.writer=null,this.conversionApi.store=null,o}},{key:"_convertItem",value:function(e,t){var n=Object.assign({viewItem:e,modelCursor:t,modelRange:null});if(e.is("element")?this.fire("element:"+e.name,n,this.conversionApi):e.is("text")?this.fire("text",n,this.conversionApi):this.fire("documentFragment",n,this.conversionApi),n.modelRange&&!(n.modelRange instanceof no))throw new It.b("view-conversion-dispatcher-incorrect-result: Incorrect conversion result was dropped.",this);return{modelRange:n.modelRange,modelCursor:n.modelCursor}}},{key:"_convertChildren",value:function(e,t){for(var n=new no(t),r=t,i=0,o=Array.from(e.getChildren());i<o.length;i++){var a=o[i],s=this._convertItem(a,r);s.modelRange instanceof no&&(n.end=s.modelRange.end,r=s.modelCursor)}return{modelRange:n,modelCursor:r}}},{key:"_splitToAllowedParent",value:function(e,t){var n=this.conversionApi.schema.findAllowedParent(t,e);if(!n)return null;if(n===t.parent)return{position:t};if(this._modelCursor.parent.getAncestors().includes(n))return null;var r=this.conversionApi.writer.split(t,n),i=[],o=!0,a=!1,s=void 0;try{for(var l,u=r.range.getWalker()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if("elementEnd"==c.type)i.push(c.item);else{var f=i.pop(),d=c.item;this._registerSplitPair(f,d)}}}catch(h){a=!0,s=h}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}return{position:r.position,cursorParent:r.range.end.parent}}},{key:"_registerSplitPair",value:function(e,t){this._splitParts.has(e)||this._splitParts.set(e,[e]);var n=this._splitParts.get(e);this._splitParts.set(t,n),n.push(t)}},{key:"_getSplitParts",value:function(e){return this._splitParts.has(e)?this._splitParts.get(e):[e]}},{key:"_removeEmptyElements",value:function(){var e=!1,t=!0,n=!1,r=void 0;try{for(var i,o=this._splitParts.keys()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;a.isEmpty&&(this.conversionApi.writer.remove(a),this._splitParts.delete(a),e=!0)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}e&&this._removeEmptyElements()}}]),e}();Yt(ta,zt);var na=function(){function e(t,n){var r=this;f(this,e),this.model=t,this.processor=n,this.mapper=new ro,this.downcastDispatcher=new ao({mapper:this.mapper}),this.downcastDispatcher.on("insert:$text",(function(e,t,n){if(n.consumable.consume(t.item,"insert")){var r=n.writer,i=n.mapper.toViewPosition(t.range.start),o=r.createText(t.item.data);r.insert(i,o)}}),{priority:"lowest"}),this.upcastDispatcher=new ta({schema:t.schema}),this.upcastDispatcher.on("text",(function(e,t,n){if(n.schema.checkChild(t.modelCursor,"$text")&&n.consumable.consume(t.viewItem)){var r=n.writer.createText(t.viewItem.data);n.writer.insert(r,t.modelCursor),t.modelRange=no._createFromPositionAndShift(t.modelCursor,r.offsetSize),t.modelCursor=t.modelRange.end}}),{priority:"lowest"}),this.upcastDispatcher.on("element",(function(e,t,n){if(!t.modelRange&&n.consumable.consume(t.viewItem,{name:!0})){var r=n.convertChildren(t.viewItem,t.modelCursor),i=r.modelRange,o=r.modelCursor;t.modelRange=i,t.modelCursor=o}}),{priority:"lowest"}),this.upcastDispatcher.on("documentFragment",(function(e,t,n){if(!t.modelRange&&n.consumable.consume(t.viewItem,{name:!0})){var r=n.convertChildren(t.viewItem,t.modelCursor),i=r.modelRange,o=r.modelCursor;t.modelRange=i,t.modelCursor=o}}),{priority:"lowest"}),this.decorate("init"),this.on("init",(function(){r.fire("ready")}),{priority:"lowest"})}return d(e,[{key:"get",value:function(e){var t=e||{},n=t.rootName,r=void 0===n?"main":n,i=t.trim,o=void 0===i?"empty":i;if(!this._checkIfRootsExists([r]))throw new It.b("datacontroller-get-non-existent-root: Attempting to get data from a non-existing root.",this);var a=this.model.document.getRoot(r);return"empty"!==o||this.model.hasContent(a,{ignoreWhitespaces:!0})?this.stringify(a):""}},{key:"stringify",value:function(e){var t=this.toView(e);return this.processor.toData(t)}},{key:"toView",value:function(e){this.mapper.clearBindings();var t=no._createIn(e),n=new rr,r=new ir(new zn);if(this.mapper.bindElements(e,n),this.downcastDispatcher.convertInsert(t,r),!e.is("documentFragment")){var i=function(e){var t=[],n=e.root.document;if(!n)return[];var r=no._createIn(e),i=!0,o=!1,a=void 0;try{for(var s,l=n.model.markers[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=r.getIntersection(u.getRange());c&&t.push([u.name,c])}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return t}(e),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var f=l.value,d=c(f,2),h=d[0],p=d[1];this.downcastDispatcher.convertMarkerAdd(h,p,r)}}catch(v){a=!0,s=v}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}return n}},{key:"init",value:function(e){var t=this;if(this.model.document.version)throw new It.b("datacontroller-init-document-not-empty: Trying to set initial data to not empty document.",this);var n={};if("string"==typeof e?n.main=e:n=e,!this._checkIfRootsExists(Object.keys(n)))throw new It.b("datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.",this);return this.model.enqueueChange("transparent",(function(e){for(var r=0,i=Object.keys(n);r<i.length;r++){var o=i[r],a=t.model.document.getRoot(o);e.insert(t.parse(n[o],a),a,0)}})),Promise.resolve()}},{key:"set",value:function(e){var t=this,n={};if("string"==typeof e?n.main=e:n=e,!this._checkIfRootsExists(Object.keys(n)))throw new It.b("datacontroller-set-non-existent-root: Attempting to set data on a non-existing root.",this);this.model.enqueueChange("transparent",(function(e){e.setSelection(null),e.removeSelectionAttribute(t.model.document.selection.getAttributeKeys());for(var r=0,i=Object.keys(n);r<i.length;r++){var o=i[r],a=t.model.document.getRoot(o);e.remove(e.createRangeIn(a)),e.insert(t.parse(n[o],a),a,0)}}))}},{key:"parse",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"$root",n=this.processor.toView(e);return this.toModel(n,t)}},{key:"toModel",value:function(e){var t=this,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"$root";return this.model.change((function(r){return t.upcastDispatcher.convert(e,r,n)}))}},{key:"destroy",value:function(){this.stopListening()}},{key:"_checkIfRootsExists",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(!this.model.document.getRootNames().includes(a))return!1}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!0}}]),e}();Yt(na,wn);var ra=function(){function e(t,n){f(this,e),this._helpers=new Map,this._downcast=Array.isArray(t)?t:[t],this._createConversionHelpers({name:"downcast",dispatchers:this._downcast,isDowncast:!0}),this._upcast=Array.isArray(n)?n:[n],this._createConversionHelpers({name:"upcast",dispatchers:this._upcast,isDowncast:!1})}return d(e,[{key:"addAlias",value:function(e,t){var n=this._downcast.includes(t);if(!this._upcast.includes(t)&&!n)throw new It.b("conversion-add-alias-dispatcher-not-registered: Trying to register and alias for a dispatcher that nas not been registered.",this);this._createConversionHelpers({name:e,dispatchers:[t],isDowncast:n})}},{key:"for",value:function(e){if(!this._helpers.has(e))throw new It.b("conversion-for-unknown-group: Trying to add a converter to an unknown dispatchers group.",this);return this._helpers.get(e)}},{key:"elementToElement",value:function(e){this.for("downcast").elementToElement(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").elementToElement({model:s,view:l,converterPriority:e.converterPriority})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"attributeToElement",value:function(e){this.for("downcast").attributeToElement(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").elementToAttribute({view:l,model:s,converterPriority:e.converterPriority})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"attributeToAttribute",value:function(e){this.for("downcast").attributeToAttribute(e);var t=!0,n=!1,r=void 0;try{for(var i,o=ia(e)[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=a.model,l=a.view;this.for("upcast").attributeToAttribute({view:l,model:s})}}catch(u){n=!0,r=u}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"_createConversionHelpers",value:function(e){var t=e.name,n=e.dispatchers,r=e.isDowncast;if(this._helpers.has(t))throw new It.b("conversion-group-exists: Trying to register a group name that has already been registered.",this);var i=r?new xo(n):new Po(n);this._helpers.set(t,i)}}]),e}();function ia(e){var t,n,i,o,a,l,u,c,f;return s.wrap((function(r){for(;;)switch(r.prev=r.next){case 0:if(!e.model.values){r.next=29;break}t=!0,n=!1,i=void 0,r.prev=4,o=e.model.values[Symbol.iterator]();case 6:if(t=(a=o.next()).done){r.next=13;break}return l=a.value,u={key:e.model.key,value:l},c=e.view[l],f=e.upcastAlso?e.upcastAlso[l]:void 0,r.delegateYield(oa(u,c,f),"t0",10);case 10:t=!0,r.next=6;break;case 13:r.next=19;break;case 15:r.prev=15,r.t1=r.catch(4),n=!0,i=r.t1;case 19:r.prev=19,r.prev=20,t||null==o.return||o.return();case 22:if(r.prev=22,!n){r.next=25;break}throw i;case 25:return r.finish(22);case 26:return r.finish(19);case 27:r.next=30;break;case 29:return r.delegateYield(oa(e.model,e.view,e.upcastAlso),"t2",30);case 30:case"end":return r.stop()}}),r,null,[[4,15,19,27],[20,,22,26]])}function oa(e,t,n){var r,i,o,a,l,u;return s.wrap((function(s){for(;;)switch(s.prev=s.next){case 0:return s.next=2,{model:e,view:t};case 2:if(!n){s.next=30;break}n=Array.isArray(n)?n:[n],r=!0,i=!1,o=void 0,s.prev=7,a=n[Symbol.iterator]();case 9:if(r=(l=a.next()).done){s.next=16;break}return u=l.value,s.next=13,{model:e,view:u};case 13:r=!0,s.next=9;break;case 16:s.next=22;break;case 18:s.prev=18,s.t0=s.catch(7),i=!0,o=s.t0;case 22:s.prev=22,s.prev=23,r||null==a.return||a.return();case 25:if(s.prev=25,!i){s.next=28;break}throw o;case 28:return s.finish(25);case 29:return s.finish(22);case 30:case"end":return s.stop()}}),m,null,[[7,18,22,30],[23,,25,29]])}var aa=function(){function e(){var t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"default";f(this,e),this.operations=[],this.type=t}return d(e,[{key:"addOperation",value:function(e){return e.batch=this,this.operations.push(e),e}},{key:"baseVersion",get:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.operations[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(null!==o.baseVersion)return o.baseVersion}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return null}}]),e}(),sa=function(){function e(t){f(this,e),this.baseVersion=t,this.isDocumentOperation=null!==this.baseVersion,this.batch=null}return d(e,[{key:"_validate",value:function(){}},{key:"toJSON",value:function(){var e=Object.assign({},this);return e.__className=this.constructor.className,delete e.batch,delete e.isDocumentOperation,e}}],[{key:"fromJSON",value:function(e){return new this(e.baseVersion)}},{key:"className",get:function(){return"Operation"}}]),e}(),la=function(){function e(t){f(this,e),this.markers=new Map,this._children=new Ji,t&&this._insertChild(0,t)}return d(e,[{key:Symbol.iterator,value:function(){return this.getChildren()}},{key:"is",value:function(e){return"documentFragment"==e||"model:documentFragment"==e}},{key:"getChild",value:function(e){return this._children.getNode(e)}},{key:"getChildren",value:function(){return this._children[Symbol.iterator]()}},{key:"getChildIndex",value:function(e){return this._children.getNodeIndex(e)}},{key:"getChildStartOffset",value:function(e){return this._children.getNodeStartOffset(e)}},{key:"getPath",value:function(){return[]}},{key:"getNodeByPath",value:function(e){var t=this,n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t=t.getChild(t.offsetToIndex(s))}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}},{key:"offsetToIndex",value:function(e){return this._children.offsetToIndex(e)}},{key:"toJSON",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._children[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e.push(a.toJSON())}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"_appendChild",value:function(e){this._insertChild(this.childCount,e)}},{key:"_insertChild",value:function(e,t){var n=function(e){return"string"==typeof e?[new Qi(e)]:(Zt(e)||(e=[e]),Array.from(e).map((function(e){return"string"==typeof e?new Qi(e):e instanceof Ki?new Qi(e.data,e.getAttributes()):e})))}(t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;null!==l.parent&&l._remove(),l.parent=this}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._children._insertNodes(e,n)}},{key:"_removeChildren",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:1,n=this._children._removeNodes(e,t),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.parent=null}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return n}},{key:"childCount",get:function(){return this._children.length}},{key:"maxOffset",get:function(){return this._children.maxOffset}},{key:"isEmpty",get:function(){return 0===this.childCount}},{key:"root",get:function(){return this}},{key:"parent",get:function(){return null}}],[{key:"fromJSON",value:function(t){var n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.name?n.push(Xi.fromJSON(l)):n.push(Qi.fromJSON(l))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}return new e(n)}}]),e}();function ua(e,t){var n=(t=da(t)).reduce((function(e,t){return e+t.offsetSize}),0),r=e.parent;pa(e);var i=e.index;return r._insertChild(i,t),ha(r,i+t.length),ha(r,i),new no(e,e.getShiftedBy(n))}function ca(e){if(!e.isFlat)throw new It.b("operation-utils-remove-range-not-flat: Trying to remove a range which starts and ends in different element.",this);var t=e.start.parent;pa(e.start),pa(e.end);var n=t._removeChildren(e.start.index,e.end.index-e.start.index);return ha(t,e.start.index),n}function fa(e,t){if(!e.isFlat)throw new It.b("operation-utils-move-range-not-flat: Trying to move a range which starts and ends in different element.",this);var n=ca(e);return ua(t=t._getTransformedByDeletion(e.start,e.end.offset-e.start.offset),n)}function da(e){var t=[];e instanceof Array||(e=[e]);for(var n=0;n<e.length;n++)if("string"==typeof e[n])t.push(new Qi(e[n]));else if(e[n]instanceof Ki)t.push(new Qi(e[n].data,e[n].getAttributes()));else if(e[n]instanceof la||e[n]instanceof Ji){var r=!0,i=!1,o=void 0;try{for(var a,s=e[n][Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;t.push(l)}}catch(d){i=!0,o=d}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else e[n]instanceof Gi&&t.push(e[n]);for(var u=1;u<t.length;u++){var c=t[u],f=t[u-1];c instanceof Qi&&f instanceof Qi&&va(c,f)&&(t.splice(u-1,2,new Qi(f.data+c.data,f.getAttributes())),u--)}return t}function ha(e,t){var n=e.getChild(t-1),r=e.getChild(t);if(n&&r&&n.is("text")&&r.is("text")&&va(n,r)){var i=new Qi(n.data+r.data,n.getAttributes());e._removeChildren(t-1,2),e._insertChild(t-1,i)}}function pa(e){var t=e.textNode,n=e.parent;if(t){var r=e.offset-t.startOffset,i=t.index;n._removeChildren(i,1);var o=new Qi(t.data.substr(0,r),t.getAttributes()),a=new Qi(t.data.substr(r),t.getAttributes());n._insertChild(i,[o,a])}}function va(e,t){var n=e.getAttributes(),r=t.getAttributes(),i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if(u[1]!==t.getAttribute(u[0]))return!1;r.next()}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return r.next().done}var ma=function(e,t){return li(e,t)},ga=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).range=e.clone(),a.key=n,a.oldValue=void 0===r?null:r,a.newValue=void 0===i?null:i,a}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.range,this.key,this.oldValue,this.newValue,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.range,this.key,this.newValue,this.oldValue,this.baseVersion+1)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.range=this.range.toJSON(),e}},{key:"_validate",value:function(){if(!this.range.isFlat)throw new It.b("attribute-operation-range-not-flat: The range to change is not flat.",this);var e=!0,t=!1,n=void 0;try{for(var r,i=this.range.getItems({shallow:!0})[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(null!==this.oldValue&&!ma(o.getAttribute(this.key),this.oldValue))throw new It.b("attribute-operation-wrong-old-value: Changed node has different attribute value than operation's old attribute value.",this,{item:o,key:this.key,value:this.oldValue});if(null===this.oldValue&&null!==this.newValue&&o.hasAttribute(this.key))throw new It.b("attribute-operation-attribute-exists: The attribute with given key already exists.",this,{node:o,key:this.key})}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"_execute",value:function(){ma(this.oldValue,this.newValue)||function(e,t,n){pa(e.start),pa(e.end);var r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems({shallow:!0})[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=l.is("textProxy")?l.textNode:l;null!==n?u._setAttribute(t,n):u._removeAttribute(t),ha(u.parent,u.index)}}catch(c){i=!0,o=c}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}ha(e.end.parent,e.end.index)}(this.range,this.key,this.newValue)}},{key:"type",get:function(){return null===this.oldValue?"addAttribute":null===this.newValue?"removeAttribute":"changeAttribute"}}],[{key:"fromJSON",value:function(e,n){return new t(no.fromJSON(e.range,n),e.key,e.oldValue,e.newValue,e.baseVersion)}},{key:"className",get:function(){return"AttributeOperation"}}]),t}(sa),ya=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,null))).sourcePosition=e.clone(),r.howMany=n,r}return v(t,e),d(t,[{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=this.sourcePosition.toJSON(),e}},{key:"_validate",value:function(){if(this.sourcePosition.root.document)throw new It.b("detach-operation-on-document-node: Cannot detach document node.",this)}},{key:"_execute",value:function(){ca(no._createFromPositionAndShift(this.sourcePosition,this.howMany))}},{key:"type",get:function(){return"detach"}}],[{key:"className",get:function(){return"DetachOperation"}}]),t}(sa),ba=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).sourcePosition=e.clone(),o.sourcePosition.stickiness="toNext",o.howMany=n,o.targetPosition=r.clone(),o.targetPosition.stickiness="toNone",o}return v(t,e),d(t,[{key:"clone",value:function(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.baseVersion)}},{key:"getMovedRangeStart",value:function(){return this.targetPosition._getTransformedByDeletion(this.sourcePosition,this.howMany)}},{key:"getReversed",value:function(){var e=this.sourcePosition._getTransformedByInsertion(this.targetPosition,this.howMany);return new this.constructor(this.getMovedRangeStart(),this.howMany,e,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.sourcePosition.parent,t=this.targetPosition.parent,n=this.sourcePosition.offset,r=this.targetPosition.offset;if(n+this.howMany>e.maxOffset)throw new It.b("move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.",this);if(e===t&&n<r&&r<n+this.howMany)throw new It.b("move-operation-range-into-itself: Trying to move a range of nodes to the inside of that range.",this);if(this.sourcePosition.root==this.targetPosition.root&&"prefix"==$t(this.sourcePosition.getParentPath(),this.targetPosition.getParentPath())){var i=this.sourcePosition.path.length-1;if(this.targetPosition.path[i]>=n&&this.targetPosition.path[i]<n+this.howMany)throw new It.b("move-operation-node-into-itself: Trying to move a range of nodes into one of nodes from that range.",this)}}},{key:"_execute",value:function(){fa(no._createFromPositionAndShift(this.sourcePosition,this.howMany),this.targetPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=this.sourcePosition.toJSON(),e.targetPosition=this.targetPosition.toJSON(),e}},{key:"type",get:function(){return"$graveyard"==this.targetPosition.root.rootName?"remove":"$graveyard"==this.sourcePosition.root.rootName?"reinsert":"move"}}],[{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.sourcePosition,t),r=to.fromJSON(e.targetPosition,t);return new this(n,e.howMany,r,e.baseVersion)}},{key:"className",get:function(){return"MoveOperation"}}]),t}(sa),ka=function(e){function t(e,n,r){var i;return f(this,t),(i=h(this,p(t).call(this,r))).position=e.clone(),i.position.stickiness="toNone",i.nodes=new Ji(da(n)),i.shouldReceiveAttributes=!1,i}return v(t,e),d(t,[{key:"clone",value:function(){var e=new Ji(u(this.nodes).map((function(e){return e._clone(!0)}))),n=new t(this.position,e,this.baseVersion);return n.shouldReceiveAttributes=this.shouldReceiveAttributes,n}},{key:"getReversed",value:function(){var e=this.position.root.document.graveyard,t=new to(e,[0]);return new ba(this.position,this.nodes.maxOffset,t,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.position.parent;if(!e||e.maxOffset<this.position.offset)throw new It.b("insert-operation-position-invalid: Insertion position is invalid.",this)}},{key:"_execute",value:function(){var e=this.nodes;this.nodes=new Ji(u(e).map((function(e){return e._clone(!0)}))),ua(this.position,e)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.position=this.position.toJSON(),e.nodes=this.nodes.toJSON(),e}},{key:"type",get:function(){return"insert"}},{key:"howMany",get:function(){return this.nodes.maxOffset}}],[{key:"fromJSON",value:function(e,n){var r=[],i=!0,o=!1,a=void 0;try{for(var s,l=e.nodes[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;u.name?r.push(Xi.fromJSON(u)):r.push(Qi.fromJSON(u))}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var c=new t(to.fromJSON(e.position,n),r,e.baseVersion);return c.shouldReceiveAttributes=e.shouldReceiveAttributes,c}},{key:"className",get:function(){return"InsertOperation"}}]),t}(sa),wa=function(e){function t(e,n,r,i,o,a){var s;return f(this,t),(s=h(this,p(t).call(this,a))).name=e,s.oldRange=n?n.clone():null,s.newRange=r?r.clone():null,s.affectsData=o,s._markers=i,s}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.name,this.oldRange,this.newRange,this._markers,this.affectsData,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.name,this.newRange,this.oldRange,this._markers,this.affectsData,this.baseVersion+1)}},{key:"_execute",value:function(){var e=this.newRange?"_set":"_remove";this._markers[e](this.name,this.newRange,!0,this.affectsData)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return this.oldRange&&(e.oldRange=this.oldRange.toJSON()),this.newRange&&(e.newRange=this.newRange.toJSON()),delete e._markers,e}},{key:"type",get:function(){return"marker"}}],[{key:"fromJSON",value:function(e,n){return new t(e.name,e.oldRange?no.fromJSON(e.oldRange,n):null,e.newRange?no.fromJSON(e.newRange,n):null,n.model.markers,e.affectsData,e.baseVersion)}},{key:"className",get:function(){return"MarkerOperation"}}]),t}(sa),_a=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).position=e,o.position.stickiness="toNext",o.oldName=n,o.newName=r,o}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.position.clone(),this.oldName,this.newName,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.position.clone(),this.newName,this.oldName,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.position.nodeAfter;if(!(e instanceof Xi))throw new It.b("rename-operation-wrong-position: Given position is invalid or node after it is not an instance of Element.",this);if(e.name!==this.oldName)throw new It.b("rename-operation-wrong-name: Element to change has different name than operation's old name.",this)}},{key:"_execute",value:function(){this.position.nodeAfter.name=this.newName}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.position=this.position.toJSON(),e}},{key:"type",get:function(){return"rename"}}],[{key:"fromJSON",value:function(e,n){return new t(to.fromJSON(e.position,n),e.oldName,e.newName,e.baseVersion)}},{key:"className",get:function(){return"RenameOperation"}}]),t}(sa),xa=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).root=e,a.key=n,a.oldValue=r,a.newValue=i,a}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.root,this.key,this.oldValue,this.newValue,this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.root,this.key,this.newValue,this.oldValue,this.baseVersion+1)}},{key:"_validate",value:function(){if(this.root!=this.root.root||this.root.is("documentFragment"))throw new It.b("rootattribute-operation-not-a-root: The element to change is not a root element.",this,{root:this.root,key:this.key});if(null!==this.oldValue&&this.root.getAttribute(this.key)!==this.oldValue)throw new It.b("rootattribute-operation-wrong-old-value: Changed node has different attribute value than operation's old attribute value.",this,{root:this.root,key:this.key});if(null===this.oldValue&&null!==this.newValue&&this.root.hasAttribute(this.key))throw new It.b("rootattribute-operation-attribute-exists: The attribute with given key already exists.",this,{root:this.root,key:this.key})}},{key:"_execute",value:function(){null!==this.newValue?this.root._setAttribute(this.key,this.newValue):this.root._removeAttribute(this.key)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.root=this.root.toJSON(),e}},{key:"type",get:function(){return null===this.oldValue?"addRootAttribute":null===this.newValue?"removeRootAttribute":"changeRootAttribute"}}],[{key:"fromJSON",value:function(e,n){if(!n.getRoot(e.root))throw new It.b("rootattribute-operation-fromjson-no-root: Cannot create RootAttributeOperation. Root with specified name does not exist.",this,{rootName:e.root});return new t(n.getRoot(e.root),e.key,e.oldValue,e.newValue,e.baseVersion)}},{key:"className",get:function(){return"RootAttributeOperation"}}]),t}(sa),Ta=function(e){function t(e,n,r,i,o){var a;return f(this,t),(a=h(this,p(t).call(this,o))).sourcePosition=e.clone(),a.sourcePosition.stickiness="toPrevious",a.howMany=n,a.targetPosition=r.clone(),a.targetPosition.stickiness="toNext",a.graveyardPosition=i.clone(),a}return v(t,e),d(t,[{key:"clone",value:function(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.graveyardPosition,this.baseVersion)}},{key:"getReversed",value:function(){var e=this.targetPosition._getTransformedByMergeOperation(this),t=this.sourcePosition.path.slice(0,-1),n=new to(this.sourcePosition.root,t)._getTransformedByMergeOperation(this),r=new Ca(e,this.howMany,this.graveyardPosition,this.baseVersion+1);return r.insertionPosition=n,r}},{key:"_validate",value:function(){var e=this.sourcePosition.parent,t=this.targetPosition.parent;if(!e.parent)throw new It.b("merge-operation-source-position-invalid: Merge source position is invalid.",this);if(!t.parent)throw new It.b("merge-operation-target-position-invalid: Merge target position is invalid.",this);if(this.howMany!=e.maxOffset)throw new It.b("merge-operation-how-many-invalid: Merge operation specifies wrong number of nodes to move.",this)}},{key:"_execute",value:function(){var e=this.sourcePosition.parent;fa(no._createIn(e),this.targetPosition),fa(no._createOn(e),this.graveyardPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.sourcePosition=e.sourcePosition.toJSON(),e.targetPosition=e.targetPosition.toJSON(),e.graveyardPosition=e.graveyardPosition.toJSON(),e}},{key:"type",get:function(){return"merge"}},{key:"deletionPosition",get:function(){return new to(this.sourcePosition.root,this.sourcePosition.path.slice(0,-1))}},{key:"movedRange",get:function(){var e=this.sourcePosition.getShiftedBy(Number.POSITIVE_INFINITY);return new no(this.sourcePosition,e)}}],[{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.sourcePosition,t),r=to.fromJSON(e.targetPosition,t),i=to.fromJSON(e.graveyardPosition,t);return new this(n,e.howMany,r,i,e.baseVersion)}},{key:"className",get:function(){return"MergeOperation"}}]),t}(sa),Ca=function(e){function t(e,n,r,i){var o;return f(this,t),(o=h(this,p(t).call(this,i))).splitPosition=e.clone(),o.splitPosition.stickiness="toNext",o.howMany=n,o.insertionPosition=t.getInsertionPosition(e),o.insertionPosition.stickiness="toNone",o.graveyardPosition=r?r.clone():null,o.graveyardPosition&&(o.graveyardPosition.stickiness="toNext"),o}return v(t,e),d(t,[{key:"clone",value:function(){var e=new this.constructor(this.splitPosition,this.howMany,this.graveyardPosition,this.baseVersion);return e.insertionPosition=this.insertionPosition,e}},{key:"getReversed",value:function(){var e=this.splitPosition.root.document.graveyard,t=new to(e,[0]);return new Ta(this.moveTargetPosition,this.howMany,this.splitPosition,t,this.baseVersion+1)}},{key:"_validate",value:function(){var e=this.splitPosition.parent,t=this.splitPosition.offset;if(!e||e.maxOffset<t)throw new It.b("split-operation-position-invalid: Split position is invalid.",this);if(!e.parent)throw new It.b("split-operation-split-in-root: Cannot split root element.",this);if(this.howMany!=e.maxOffset-this.splitPosition.offset)throw new It.b("split-operation-how-many-invalid: Split operation specifies wrong number of nodes to move.",this);if(this.graveyardPosition&&!this.graveyardPosition.nodeAfter)throw new It.b("split-operation-graveyard-position-invalid: Graveyard position invalid.",this)}},{key:"_execute",value:function(){var e=this.splitPosition.parent;if(this.graveyardPosition)fa(no._createFromPositionAndShift(this.graveyardPosition,1),this.insertionPosition);else{var t=e._clone();ua(this.insertionPosition,t)}fa(new no(to._createAt(e,this.splitPosition.offset),to._createAt(e,e.maxOffset)),this.moveTargetPosition)}},{key:"toJSON",value:function(){var e=l(p(t.prototype),"toJSON",this).call(this);return e.splitPosition=this.splitPosition.toJSON(),e.insertionPosition=this.insertionPosition.toJSON(),this.graveyardPosition&&(e.graveyardPosition=this.graveyardPosition.toJSON()),e}},{key:"type",get:function(){return"split"}},{key:"moveTargetPosition",get:function(){var e=this.insertionPosition.path.slice();return e.push(0),new to(this.insertionPosition.root,e)}},{key:"movedRange",get:function(){var e=this.splitPosition.getShiftedBy(Number.POSITIVE_INFINITY);return new no(this.splitPosition,e)}}],[{key:"getInsertionPosition",value:function(e){var t=e.path.slice(0,-1);return t[t.length-1]++,new to(e.root,t)}},{key:"fromJSON",value:function(e,t){var n=to.fromJSON(e.splitPosition,t),r=to.fromJSON(e.insertionPosition,t),i=e.graveyardPosition?to.fromJSON(e.graveyardPosition,t):null,o=new this(n,e.howMany,i,e.baseVersion);return o.insertionPosition=r,o}},{key:"className",get:function(){return"SplitOperation"}}]),t}(sa),Sa=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"main";return f(this,t),(r=h(this,p(t).call(this,n)))._doc=e,r.rootName=i,r}return v(t,e),d(t,[{key:"is",value:function(e,n){var r=e.replace("model:","");return n?"rootElement"==r&&n==this.name||l(p(t.prototype),"is",this).call(this,e,n):"rootElement"==r||l(p(t.prototype),"is",this).call(this,e)}},{key:"toJSON",value:function(){return this.rootName}},{key:"document",get:function(){return this._doc}}]),t}(Xi),Ea=function(){function e(t,n){f(this,e),this.model=t,this.batch=n}return d(e,[{key:"createText",value:function(e,t){return new Qi(e,t)}},{key:"createElement",value:function(e,t){return new Xi(e,t)}},{key:"createDocumentFragment",value:function(){return new la}},{key:"insert",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:0;if(this._assertWriterUsedCorrectly(),!(e instanceof Qi&&""==e.data)){var r=to._createAt(t,n);if(e.parent){if(Oa(e.root,r.root))return void this.move(no._createOn(e),r);if(e.root.document)throw new It.b("model-writer-insert-forbidden-move: Cannot move a node from a document to a different tree. It is forbidden to move a node that was already in a document outside of it.",this);this.remove(e)}var i=r.root.document?r.root.document.version:null,o=new ka(r,e,i);if(e instanceof Qi&&(o.shouldReceiveAttributes=!0),this.batch.addOperation(o),this.model.applyOperation(o),e instanceof la){var a=!0,s=!1,l=void 0;try{for(var u,f=e.markers[Symbol.iterator]();!(a=(u=f.next()).done);a=!0){var d=u.value,h=c(d,2),p=h[0],v=h[1],m=to._createAt(v.root,0),g={range:new no(v.start._getCombined(m,r),v.end._getCombined(m,r)),usingOperation:!0,affectsData:!0};this.model.markers.has(p)?this.updateMarker(p,g):this.addMarker(p,g)}}catch(y){s=!0,l=y}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}}}}},{key:"insertText",value:function(e,t,n,r){t instanceof la||t instanceof Xi||t instanceof to?this.insert(this.createText(e),t,n):this.insert(this.createText(e,t),n,r)}},{key:"insertElement",value:function(e,t,n,r){t instanceof la||t instanceof Xi||t instanceof to?this.insert(this.createElement(e),t,n):this.insert(this.createElement(e,t),n,r)}},{key:"append",value:function(e,t){this.insert(e,t,"end")}},{key:"appendText",value:function(e,t,n){t instanceof la||t instanceof Xi?this.insert(this.createText(e),t,"end"):this.insert(this.createText(e,t),n,"end")}},{key:"appendElement",value:function(e,t,n){t instanceof la||t instanceof Xi?this.insert(this.createElement(e),t,"end"):this.insert(this.createElement(e,t),n,"end")}},{key:"setAttribute",value:function(e,t,n){if(this._assertWriterUsedCorrectly(),n instanceof no){var r=n.getMinimalFlatRanges(),i=!0,o=!1,a=void 0;try{for(var s,l=r[Symbol.iterator]();!(i=(s=l.next()).done);i=!0)Aa(this,e,t,s.value)}catch(u){o=!0,a=u}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}else Pa(this,e,t,n)}},{key:"setAttributes",value:function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=$i(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];this.setAttribute(u,f,t)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}},{key:"removeAttribute",value:function(e,t){if(this._assertWriterUsedCorrectly(),t instanceof no){var n=t.getMinimalFlatRanges(),r=!0,i=!1,o=void 0;try{for(var a,s=n[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)Aa(this,e,null,a.value)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else Pa(this,e,null,t)}},{key:"clearAttributes",value:function(e){var t=this;this._assertWriterUsedCorrectly();var n=function(e){var n=!0,r=!1,i=void 0;try{for(var o,a=e.getAttributeKeys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t.removeAttribute(s,e)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}};if(e instanceof no){var r=!0,i=!1,o=void 0;try{for(var a,s=e.getItems()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)n(a.value)}catch(l){i=!0,o=l}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}else n(e)}},{key:"move",value:function(e,t,n){if(this._assertWriterUsedCorrectly(),!(e instanceof no))throw new It.b("writer-move-invalid-range: Invalid range to move.",this);if(!e.isFlat)throw new It.b("writer-move-range-not-flat: Range to move is not flat.",this);var r=to._createAt(t,n);if(!r.isEqual(e.start)){if(this._addOperationForAffectedMarkers("move",e),!Oa(e.root,r.root))throw new It.b("writer-move-different-document: Range is going to be moved between different documents.",this);var i=e.root.document?e.root.document.version:null,o=new ba(e.start,e.end.offset-e.start.offset,r,i);this.batch.addOperation(o),this.model.applyOperation(o)}}},{key:"remove",value:function(e){this._assertWriterUsedCorrectly();var t=(e instanceof no?e:no._createOn(e)).getMinimalFlatRanges().reverse(),n=!0,r=!1,i=void 0;try{for(var o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._addOperationForAffectedMarkers("move",s),Na(s.start,s.end.offset-s.start.offset,this.batch,this.model)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}},{key:"merge",value:function(e){this._assertWriterUsedCorrectly();var t=e.nodeBefore,n=e.nodeAfter;if(this._addOperationForAffectedMarkers("merge",e),!(t instanceof Xi))throw new It.b("writer-merge-no-element-before: Node before merge position must be an element.",this);if(!(n instanceof Xi))throw new It.b("writer-merge-no-element-after: Node after merge position must be an element.",this);e.root.document?this._merge(e):this._mergeDetached(e)}},{key:"createPositionFromPath",value:function(e,t,n){return this.model.createPositionFromPath(e,t,n)}},{key:"createPositionAt",value:function(e,t){return this.model.createPositionAt(e,t)}},{key:"createPositionAfter",value:function(e){return this.model.createPositionAfter(e)}},{key:"createPositionBefore",value:function(e){return this.model.createPositionBefore(e)}},{key:"createRange",value:function(e,t){return this.model.createRange(e,t)}},{key:"createRangeIn",value:function(e){return this.model.createRangeIn(e)}},{key:"createRangeOn",value:function(e){return this.model.createRangeOn(e)}},{key:"createSelection",value:function(e,t,n){return this.model.createSelection(e,t,n)}},{key:"_mergeDetached",value:function(e){var t=e.nodeBefore,n=e.nodeAfter;this.move(no._createIn(n),to._createAt(t,"end")),this.remove(n)}},{key:"_merge",value:function(e){var t=to._createAt(e.nodeBefore,"end"),n=to._createAt(e.nodeAfter,0),r=e.root.document.graveyard,i=new to(r,[0]),o=e.root.document.version,a=new Ta(n,e.nodeAfter.maxOffset,t,i,o);this.batch.addOperation(a),this.model.applyOperation(a)}},{key:"rename",value:function(e,t){if(this._assertWriterUsedCorrectly(),!(e instanceof Xi))throw new It.b("writer-rename-not-element-instance: Trying to rename an object which is not an instance of Element.",this);var n=e.root.document?e.root.document.version:null,r=new _a(to._createBefore(e),e.name,t,n);this.batch.addOperation(r),this.model.applyOperation(r)}},{key:"split",value:function(e,t){this._assertWriterUsedCorrectly();var n,r,i=e.parent;if(!i.parent)throw new It.b("writer-split-element-no-parent: Element with no parent can not be split.",this);if(t||(t=i.parent),!e.parent.getAncestors({includeSelf:!0}).includes(t))throw new It.b("writer-split-invalid-limit-element: Limit element is not a position ancestor.",this);do{var o=i.root.document?i.root.document.version:null,a=i.maxOffset-e.offset,s=new Ca(e,a,null,o);this.batch.addOperation(s),this.model.applyOperation(s),n||r||(n=i,r=e.parent.nextSibling),i=(e=this.createPositionAfter(e.parent)).parent}while(i!==t);return{position:e,range:new no(to._createAt(n,"end"),to._createAt(r,0))}}},{key:"wrap",value:function(e,t){if(this._assertWriterUsedCorrectly(),!e.isFlat)throw new It.b("writer-wrap-range-not-flat: Range to wrap is not flat.",this);var n=t instanceof Xi?t:new Xi(t);if(n.childCount>0)throw new It.b("writer-wrap-element-not-empty: Element to wrap with is not empty.",this);if(null!==n.parent)throw new It.b("writer-wrap-element-attached: Element to wrap with is already attached to tree model.",this);this.insert(n,e.start);var r=new no(e.start.getShiftedBy(1),e.end.getShiftedBy(1));this.move(r,to._createAt(n,0))}},{key:"unwrap",value:function(e){if(this._assertWriterUsedCorrectly(),null===e.parent)throw new It.b("writer-unwrap-element-no-parent: Trying to unwrap an element which has no parent.",this);this.move(no._createIn(e),this.createPositionAfter(e)),this.remove(e)}},{key:"addMarker",value:function(e,t){if(this._assertWriterUsedCorrectly(),!t||"boolean"!=typeof t.usingOperation)throw new It.b("writer-addMarker-no-usingOperation: The options.usingOperation parameter is required when adding a new marker.",this);var n=t.usingOperation,r=t.range,i=void 0!==t.affectsData&&t.affectsData;if(this.model.markers.has(e))throw new It.b("writer-addMarker-marker-exists: Marker with provided name already exists.",this);if(!r)throw new It.b("writer-addMarker-no-range: Range parameter is required when adding a new marker.",this);return n?(Ma(this,e,null,r,i),this.model.markers.get(e)):this.model.markers._set(e,r,n,i)}},{key:"updateMarker",value:function(e,t){this._assertWriterUsedCorrectly();var n="string"==typeof e?e:e.name,r=this.model.markers.get(n);if(!r)throw new It.b("writer-updateMarker-marker-not-exists: Marker with provided name does not exists.",this);if(t){var i="boolean"==typeof t.usingOperation,o="boolean"==typeof t.affectsData,a=o?t.affectsData:r.affectsData;if(!i&&!t.range&&!o)throw new It.b("writer-updateMarker-wrong-options: One of the options is required - provide range, usingOperations or affectsData.",this);var s=r.getRange(),l=t.range?t.range:s;i&&t.usingOperation!==r.managedUsingOperations?t.usingOperation?Ma(this,n,null,l,a):(Ma(this,n,s,null,a),this.model.markers._set(n,l,void 0,a)):r.managedUsingOperations?Ma(this,n,s,l,a):this.model.markers._set(n,l,void 0,a)}else this.model.markers._refresh(r)}},{key:"removeMarker",value:function(e){this._assertWriterUsedCorrectly();var t="string"==typeof e?e:e.name;if(!this.model.markers.has(t))throw new It.b("writer-removeMarker-no-marker: Trying to remove marker which does not exist.",this);var n=this.model.markers.get(t);n.managedUsingOperations?Ma(this,t,n.getRange(),null,n.affectsData):this.model.markers._remove(t)}},{key:"setSelection",value:function(e,t,n){this._assertWriterUsedCorrectly(),this.model.document.selection._setTo(e,t,n)}},{key:"setSelectionFocus",value:function(e,t){this._assertWriterUsedCorrectly(),this.model.document.selection._setFocus(e,t)}},{key:"setSelectionAttribute",value:function(e,t){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._setSelectionAttribute(e,t);else{var n=!0,r=!1,i=void 0;try{for(var o,a=$i(e)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=c(s,2),u=l[0],f=l[1];this._setSelectionAttribute(u,f)}}catch(d){r=!0,i=d}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}},{key:"removeSelectionAttribute",value:function(e){if(this._assertWriterUsedCorrectly(),"string"==typeof e)this._removeSelectionAttribute(e);else{var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._removeSelectionAttribute(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}}},{key:"overrideSelectionGravity",value:function(){return this.model.document.selection._overrideGravity()}},{key:"restoreSelectionGravity",value:function(e){this.model.document.selection._restoreGravity(e)}},{key:"_setSelectionAttribute",value:function(e,t){var n=this.model.document.selection;if(n.isCollapsed&&n.anchor.parent.isEmpty){var r=yo._getStoreAttributeKey(e);this.setAttribute(r,t,n.anchor.parent)}n._setAttribute(e,t)}},{key:"_removeSelectionAttribute",value:function(e){var t=this.model.document.selection;if(t.isCollapsed&&t.anchor.parent.isEmpty){var n=yo._getStoreAttributeKey(e);this.removeAttribute(n,t.anchor.parent)}t._removeAttribute(e)}},{key:"_assertWriterUsedCorrectly",value:function(){if(this.model._currentWriter!==this)throw new It.b("writer-incorrect-use: Trying to use a writer outside the change() block.",this)}},{key:"_addOperationForAffectedMarkers",value:function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=this.model.markers[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.managedUsingOperations){var l=s.getRange(),u=!1;if("move"==e)u=t.containsPosition(l.start)||t.start.isEqual(l.start)||t.containsPosition(l.end)||t.end.isEqual(l.end);else{var c=t.nodeBefore,f=t.nodeAfter,d=l.start.parent==c&&l.start.isAtEnd,h=l.end.parent==f&&0==l.end.offset,p=l.end.nodeAfter==f,v=l.start.nodeAfter==f;u=d||h||p||v}u&&this.updateMarker(s.name,{range:l})}}}catch(m){r=!0,i=m}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}]),e}();function Aa(e,t,n,r){var i,o,a,s=e.model,l=s.document,u=r.start,c=!0,f=!1,d=void 0;try{for(var h,p=r.getWalker({shallow:!0})[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;a=v.item.getAttribute(t),i&&o!=a&&(o!=n&&m(),u=i),i=v.nextPosition,o=a}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}function m(){var r=new no(u,i),a=r.root.document?l.version:null,c=new ga(r,t,o,n,a);e.batch.addOperation(c),s.applyOperation(c)}i instanceof to&&i!=u&&o!=n&&m()}function Pa(e,t,n,r){var i,o,a=e.model,s=a.document,l=r.getAttribute(t);if(l!=n){if(r.root===r){var u=r.document?s.version:null;o=new xa(r,t,l,n,u)}else{var c=(i=new no(to._createBefore(r),e.createPositionAfter(r))).root.document?s.version:null;o=new ga(i,t,l,n,c)}e.batch.addOperation(o),a.applyOperation(o)}}function Ma(e,t,n,r,i){var o=e.model,a=o.document,s=new wa(t,n,r,o.markers,i,a.version);e.batch.addOperation(s),o.applyOperation(s)}function Na(e,t,n,r){var i;if(e.root.document){var o=r.document,a=new to(o.graveyard,[0]);i=new ba(e,t,a,o.version)}else i=new ya(e,t);n.addOperation(i),r.applyOperation(i)}function Oa(e,t){return e===t||e instanceof Sa&&t instanceof Sa}var Ia=function(){function e(t){f(this,e),this._markerCollection=t,this._changesInElement=new Map,this._elementSnapshots=new Map,this._changedMarkers=new Map,this._changeCount=0,this._cachedChanges=null,this._cachedChangesWithGraveyard=null}return d(e,[{key:"refreshItem",value:function(e){if(!this._isInInsertedElement(e.parent)){this._markRemove(e.parent,e.startOffset,e.offsetSize),this._markInsert(e.parent,e.startOffset,e.offsetSize);var t=no._createOn(e),n=!0,r=!1,i=void 0;try{for(var o,a=this._markerCollection.getMarkersIntersectingRange(t)[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=s.getRange();this.bufferMarkerChange(s.name,l,l,s.affectsData)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this._cachedChanges=null}}},{key:"bufferOperation",value:function(e){switch(e.type){case"insert":if(this._isInInsertedElement(e.position.parent))return;this._markInsert(e.position.parent,e.position.offset,e.nodes.maxOffset);break;case"addAttribute":case"removeAttribute":case"changeAttribute":var t=!0,n=!1,r=void 0;try{for(var i,o=e.range.getItems({shallow:!0})[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._isInInsertedElement(a.parent)||this._markAttribute(a)}}catch(w){n=!0,r=w}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}break;case"remove":case"move":case"reinsert":if(e.sourcePosition.isEqual(e.targetPosition)||e.sourcePosition.getShiftedBy(e.howMany).isEqual(e.targetPosition))return;var s=this._isInInsertedElement(e.sourcePosition.parent),l=this._isInInsertedElement(e.targetPosition.parent);s||this._markRemove(e.sourcePosition.parent,e.sourcePosition.offset,e.howMany),l||this._markInsert(e.targetPosition.parent,e.getMovedRangeStart().offset,e.howMany);break;case"rename":if(this._isInInsertedElement(e.position.parent))return;this._markRemove(e.position.parent,e.position.offset,1),this._markInsert(e.position.parent,e.position.offset,1);var u=no._createFromPositionAndShift(e.position,1),c=!0,f=!1,d=void 0;try{for(var h,p=this._markerCollection.getMarkersIntersectingRange(u)[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value,m=v.getRange();this.bufferMarkerChange(v.name,m,m,v.affectsData)}}catch(w){f=!0,d=w}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}break;case"split":var g=e.splitPosition.parent;this._isInInsertedElement(g)||this._markRemove(g,e.splitPosition.offset,e.howMany),this._isInInsertedElement(e.insertionPosition.parent)||this._markInsert(e.insertionPosition.parent,e.insertionPosition.offset,1),e.graveyardPosition&&this._markRemove(e.graveyardPosition.parent,e.graveyardPosition.offset,1);break;case"merge":var y=e.sourcePosition.parent;this._isInInsertedElement(y.parent)||this._markRemove(y.parent,y.startOffset,1);var b=e.graveyardPosition.parent;this._markInsert(b,e.graveyardPosition.offset,1);var k=e.targetPosition.parent;this._isInInsertedElement(k)||this._markInsert(k,e.targetPosition.offset,y.maxOffset)}this._cachedChanges=null}},{key:"bufferMarkerChange",value:function(e,t,n,r){var i=this._changedMarkers.get(e);i?(i.newRange=n,i.affectsData=r,null==i.oldRange&&null==i.newRange&&this._changedMarkers.delete(e)):this._changedMarkers.set(e,{oldRange:t,newRange:n,affectsData:r})}},{key:"getMarkersToRemove",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._changedMarkers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=c(a,2),l=s[0],u=s[1];null!=u.oldRange&&e.push({name:l,range:u.oldRange})}}catch(f){n=!0,r=f}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"getMarkersToAdd",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._changedMarkers[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value,s=c(a,2),l=s[0],u=s[1];null!=u.newRange&&e.push({name:l,range:u.newRange})}}catch(f){n=!0,r=f}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return e}},{key:"getChangedMarkers",value:function(){return Array.from(this._changedMarkers).map((function(e){return{name:e[0],data:{oldRange:e[1].oldRange,newRange:e[1].newRange}}}))}},{key:"hasDataChanges",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._changedMarkers[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(c(o,2)[1].affectsData)return!0}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return this._changesInElement.size>0}},{key:"getChanges",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{includeChangesInGraveyard:!1};if(this._cachedChanges)return e.includeChangesInGraveyard?this._cachedChangesWithGraveyard.slice():this._cachedChanges.slice();var t=[],n=!0,r=!1,i=void 0;try{for(var o,a=this._changesInElement.keys()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=this._changesInElement.get(s).sort((function(e,t){return e.offset===t.offset?e.type!=t.type?"remove"==e.type?-1:1:0:e.offset<t.offset?-1:1})),c=this._elementSnapshots.get(s),f=Da(s.getChildren()),d=Ra(c.length,l),h=0,p=0,v=!0,m=!1,g=void 0;try{for(var y,b=d[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value;if("i"===k)t.push(this._getInsertDiff(s,h,f[h].name)),h++;else if("r"===k)t.push(this._getRemoveDiff(s,h,c[p].name)),p++;else if("a"===k){var w=f[h].attributes,_=c[p].attributes,x=void 0;if("$text"==f[h].name)x=new no(to._createAt(s,h),to._createAt(s,h+1));else{var T=s.offsetToIndex(h);x=new no(to._createAt(s,h),to._createAt(s.getChild(T),0))}t.push.apply(t,u(this._getAttributesDiff(x,_,w))),h++,p++}else h++,p++}}catch(D){m=!0,g=D}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}catch(D){r=!0,i=D}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}t.sort((function(e,t){return e.position.root!=t.position.root?e.position.root.rootName<t.position.root.rootName?-1:1:e.position.isEqual(t.position)?e.changeCount-t.changeCount:e.position.isBefore(t.position)?-1:1}));for(var C=1;C<t.length;C++){var S=t[C-1],E=t[C],A="remove"==S.type&&"remove"==E.type&&"$text"==S.name&&"$text"==E.name&&S.position.isEqual(E.position),P="insert"==S.type&&"insert"==E.type&&"$text"==S.name&&"$text"==E.name&&S.position.parent==E.position.parent&&S.position.offset+S.length==E.position.offset,M="attribute"==S.type&&"attribute"==E.type&&S.position.parent==E.position.parent&&S.range.isFlat&&E.range.isFlat&&S.position.offset+S.length==E.position.offset&&S.attributeKey==E.attributeKey&&S.attributeOldValue==E.attributeOldValue&&S.attributeNewValue==E.attributeNewValue;(A||P||M)&&(t[C-1].length++,M&&(t[C-1].range.end=t[C-1].range.end.getShiftedBy(1)),t.splice(C,1),C--)}for(var N=0,O=t;N<O.length;N++){var I=O[N];delete I.changeCount,"attribute"==I.type&&(delete I.position,delete I.length)}return this._changeCount=0,this._cachedChangesWithGraveyard=t.slice(),this._cachedChanges=t.slice().filter(La),e.includeChangesInGraveyard?this._cachedChangesWithGraveyard:this._cachedChanges}},{key:"reset",value:function(){this._changesInElement.clear(),this._elementSnapshots.clear(),this._changedMarkers.clear(),this._cachedChanges=null}},{key:"_markInsert",value:function(e,t,n){var r={type:"insert",offset:t,howMany:n,count:this._changeCount++};this._markChange(e,r)}},{key:"_markRemove",value:function(e,t,n){var r={type:"remove",offset:t,howMany:n,count:this._changeCount++};this._markChange(e,r),this._removeAllNestedChanges(e,t,n)}},{key:"_markAttribute",value:function(e){var t={type:"attribute",offset:e.startOffset,howMany:e.offsetSize,count:this._changeCount++};this._markChange(e.parent,t)}},{key:"_markChange",value:function(e,t){this._makeSnapshot(e);var n=this._getChangesForElement(e);this._handleChange(t,n),n.push(t);for(var r=0;r<n.length;r++)n[r].howMany<1&&(n.splice(r,1),r--)}},{key:"_getChangesForElement",value:function(e){var t;return this._changesInElement.has(e)?t=this._changesInElement.get(e):(t=[],this._changesInElement.set(e,t)),t}},{key:"_makeSnapshot",value:function(e){this._elementSnapshots.has(e)||this._elementSnapshots.set(e,Da(e.getChildren()))}},{key:"_handleChange",value:function(e,t){e.nodesToHandle=e.howMany;var n=!0,r=!1,i=void 0;try{for(var o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=e.offset+e.howMany,u=s.offset+s.howMany;if("insert"==e.type&&("insert"==s.type&&(e.offset<=s.offset?s.offset+=e.howMany:e.offset<u&&(s.howMany+=e.nodesToHandle,e.nodesToHandle=0)),"remove"==s.type&&e.offset<s.offset&&(s.offset+=e.howMany),"attribute"==s.type))if(e.offset<=s.offset)s.offset+=e.howMany;else if(e.offset<u){var c=s.howMany;s.howMany=e.offset-s.offset,t.unshift({type:"attribute",offset:l,howMany:c-s.howMany,count:this._changeCount++})}if("remove"==e.type){if("insert"==s.type)if(l<=s.offset)s.offset-=e.howMany;else if(l<=u)if(e.offset<s.offset){var f=l-s.offset;s.offset=e.offset,s.howMany-=f,e.nodesToHandle-=f}else s.howMany-=e.nodesToHandle,e.nodesToHandle=0;else if(e.offset<=s.offset)e.nodesToHandle-=s.howMany,s.howMany=0;else if(e.offset<u){var d=u-e.offset;s.howMany-=d,e.nodesToHandle-=d}if("remove"==s.type&&(l<=s.offset?s.offset-=e.howMany:e.offset<s.offset&&(e.nodesToHandle+=s.howMany,s.howMany=0)),"attribute"==s.type)if(l<=s.offset)s.offset-=e.howMany;else if(e.offset<s.offset){var h=l-s.offset;s.offset=e.offset,s.howMany-=h}else if(e.offset<u)if(l<=u){var p=s.howMany;s.howMany=e.offset-s.offset;var v=p-s.howMany-e.nodesToHandle;t.unshift({type:"attribute",offset:e.offset,howMany:v,count:this._changeCount++})}else s.howMany-=u-e.offset}if("attribute"==e.type){if("insert"==s.type)if(e.offset<s.offset&&l>s.offset){if(l>u){var m={type:"attribute",offset:u,howMany:l-u,count:this._changeCount++};this._handleChange(m,t),t.push(m)}e.nodesToHandle=s.offset-e.offset,e.howMany=e.nodesToHandle}else e.offset>=s.offset&&e.offset<u&&(l>u?(e.nodesToHandle=l-u,e.offset=u):e.nodesToHandle=0);if("remove"==s.type&&e.offset<s.offset&&l>s.offset){var g={type:"attribute",offset:s.offset,howMany:l-s.offset,count:this._changeCount++};this._handleChange(g,t),t.push(g),e.nodesToHandle=s.offset-e.offset,e.howMany=e.nodesToHandle}"attribute"==s.type&&(e.offset>=s.offset&&l<=u?(e.nodesToHandle=0,e.howMany=0,e.offset=0):e.offset<=s.offset&&l>=u&&(s.howMany=0))}}}catch(y){r=!0,i=y}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}e.howMany=e.nodesToHandle,delete e.nodesToHandle}},{key:"_getInsertDiff",value:function(e,t,n){return{type:"insert",position:to._createAt(e,t),name:n,length:1,changeCount:this._changeCount++}}},{key:"_getRemoveDiff",value:function(e,t,n){return{type:"remove",position:to._createAt(e,t),name:n,length:1,changeCount:this._changeCount++}}},{key:"_getAttributesDiff",value:function(e,t,n){var r=[];n=new Map(n);var i=!0,o=!1,a=void 0;try{for(var s,l=t[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,f=c(u,2),d=f[0],h=f[1],p=n.has(d)?n.get(d):null;p!==h&&r.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:d,attributeOldValue:h,attributeNewValue:p,changeCount:this._changeCount++}),n.delete(d)}}catch(T){o=!0,a=T}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}var v=!0,m=!1,g=void 0;try{for(var y,b=n[Symbol.iterator]();!(v=(y=b.next()).done);v=!0){var k=y.value,w=c(k,2),_=w[0],x=w[1];r.push({type:"attribute",position:e.start,range:e.clone(),length:1,attributeKey:_,attributeOldValue:null,attributeNewValue:x,changeCount:this._changeCount++})}}catch(T){m=!0,g=T}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}return r}},{key:"_isInInsertedElement",value:function(e){var t=e.parent;if(!t)return!1;var n=this._changesInElement.get(t),r=e.startOffset;if(n){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if("insert"==u.type&&r>=u.offset&&r<u.offset+u.howMany)return!0}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}return this._isInInsertedElement(t)}},{key:"_removeAllNestedChanges",value:function(e,t,n){var r=new no(to._createAt(e,t),to._createAt(e,t+n)),i=!0,o=!1,a=void 0;try{for(var s,l=r.getItems({shallow:!0})[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;u.is("element")&&(this._elementSnapshots.delete(u),this._changesInElement.delete(u),this._removeAllNestedChanges(u,0,u.maxOffset))}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}},{key:"isEmpty",get:function(){return 0==this._changesInElement.size&&0==this._changedMarkers.size}}]),e}();function Da(e){var t=[],n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.is("text"))for(var l=0;l<s.data.length;l++)t.push({name:"$text",attributes:new Map(s.getAttributes())});else t.push({name:s.name,attributes:new Map(s.getAttributes())})}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return t}function Ra(e,t){var n=[],r=0,i=0,o=!0,a=!1,s=void 0;try{for(var l,c=t[Symbol.iterator]();!(o=(l=c.next()).done);o=!0){var f=l.value;if(f.offset>r){for(var d=0;d<f.offset-r;d++)n.push("e");i+=f.offset-r}if("insert"==f.type){for(var h=0;h<f.howMany;h++)n.push("i");r=f.offset+f.howMany}else if("remove"==f.type){for(var p=0;p<f.howMany;p++)n.push("r");r=f.offset,i+=f.howMany}else n.push.apply(n,u("a".repeat(f.howMany).split(""))),r=f.offset+f.howMany,i+=f.howMany}}catch(m){a=!0,s=m}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}if(i<e)for(var v=0;v<e-i-r;v++)n.push("e");return n}function La(e){var t=e.position&&"$graveyard"==e.position.root.rootName,n=e.range&&"$graveyard"==e.range.root.rootName;return!t&&!n}var ja=function(){function e(){f(this,e),this._operations=[],this._undoPairs=new Map,this._undoneOperations=new Set}return d(e,[{key:"addOperation",value:function(e){this._operations.includes(e)||this._operations.push(e)}},{key:"getOperations",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:0,t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:Number.POSITIVE_INFINITY;return e<0?[]:this._operations.slice(e,t)}},{key:"getOperation",value:function(e){return this._operations[e]}},{key:"setOperationAsUndone",value:function(e,t){this._undoPairs.set(t,e),this._undoneOperations.add(e)}},{key:"isUndoingOperation",value:function(e){return this._undoPairs.has(e)}},{key:"isUndoneOperation",value:function(e){return this._undoneOperations.has(e)}},{key:"getUndoneOperation",value:function(e){return this._undoPairs.get(e)}}]),e}();function Fa(e,t){return!!(n=e.charAt(t-1))&&1==n.length&&/[\ud800-\udbff]/.test(n)&&function(e){return!!e&&1==e.length&&/[\udc00-\udfff]/.test(e)}(e.charAt(t));var n}function za(e,t){return!!(n=e.charAt(t))&&1==n.length&&/[\u0300-\u036f\u1ab0-\u1aff\u1dc0-\u1dff\u20d0-\u20ff\ufe20-\ufe2f]/.test(n);var n}var Va="$graveyard",Ba=function(){function e(t){var n=this;f(this,e),this.model=t,this.version=0,this.history=new ja(this),this.selection=new yo(this),this.roots=new Fn({idProperty:"rootName"}),this.differ=new Ia(t.markers),this._postFixers=new Set,this._hasSelectionChangedFromTheLastChangeBlock=!1,this.createRoot("$root",Va),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];if(r.isDocumentOperation&&r.baseVersion!==n.version)throw new It.b("model-document-applyOperation-wrong-version: Only operations with matching versions can be applied.",n,{operation:r})}),{priority:"highest"}),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];r.isDocumentOperation&&n.differ.bufferOperation(r)}),{priority:"high"}),this.listenTo(t,"applyOperation",(function(e,t){var r=t[0];r.isDocumentOperation&&(n.version++,n.history.addOperation(r))}),{priority:"low"}),this.listenTo(this.selection,"change",(function(){n._hasSelectionChangedFromTheLastChangeBlock=!0})),this.listenTo(t.markers,"update",(function(e,t,r,i){n.differ.bufferMarkerChange(t.name,r,i,t.affectsData),null===r&&t.on("change",(function(e,r){n.differ.bufferMarkerChange(t.name,r,t.getRange(),t.affectsData)}))}))}return d(e,[{key:"createRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"$root",t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"main";if(this.roots.get(t))throw new It.b("model-document-createRoot-name-exists: Root with specified name already exists.",this,{name:t});var n=new Sa(this,e,t);return this.roots.add(n),n}},{key:"destroy",value:function(){this.selection.destroy(),this.stopListening()}},{key:"getRoot",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this.roots.get(e)}},{key:"getRootNames",value:function(){return Array.from(this.roots,(function(e){return e.rootName})).filter((function(e){return e!=Va}))}},{key:"registerPostFixer",value:function(e){this._postFixers.add(e)}},{key:"toJSON",value:function(){var e=Gt(this);return e.selection="[engine.model.DocumentSelection]",e.model="[engine.model.Model]",e}},{key:"_handleChangeBlock",value:function(e){this._hasDocumentChangedFromTheLastChangeBlock()&&(this._callPostFixers(e),this.selection.refresh(),this.differ.hasDataChanges()?this.fire("change:data",e.batch):this.fire("change",e.batch),this.selection.refresh(),this.differ.reset()),this._hasSelectionChangedFromTheLastChangeBlock=!1}},{key:"_hasDocumentChangedFromTheLastChangeBlock",value:function(){return!this.differ.isEmpty||this._hasSelectionChangedFromTheLastChangeBlock}},{key:"_getDefaultRoot",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.roots[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;if(o!==this.graveyard)return o}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}return this.graveyard}},{key:"_getDefaultRange",value:function(){var e=this._getDefaultRoot(),t=this.model,n=t.schema,r=t.createPositionFromPath(e,[0]);return n.getNearestSelectionRange(r)||t.createRange(r)}},{key:"_validateSelectionRange",value:function(e){return Ua(e.start)&&Ua(e.end)}},{key:"_callPostFixers",value:function(e){var t=!1;do{var n=!0,r=!1,i=void 0;try{for(var o,a=this._postFixers[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(this.selection.refresh(),t=s(e))break}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}while(t)}},{key:"graveyard",get:function(){return this.getRoot(Va)}}]),e}();function Ua(e){var t=e.textNode;if(t){var n=t.data,r=e.offset-t.startOffset;return!Fa(n,r)&&!za(n,r)}return!0}Yt(Ba,zt);var Ha=function(){function e(){f(this,e),this._markers=new Map}return d(e,[{key:Symbol.iterator,value:function(){return this._markers.values()}},{key:"has",value:function(e){return this._markers.has(e)}},{key:"get",value:function(e){return this._markers.get(e)||null}},{key:"_set",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]&&arguments[2],r=arguments.length>3&&void 0!==arguments[3]&&arguments[3],i=e instanceof qa?e.name:e,o=this._markers.get(i);if(o){var a=o.getRange(),s=!1;return a.isEqual(t)||(o._attachLiveRange(po.fromRange(t)),s=!0),n!=o.managedUsingOperations&&(o._managedUsingOperations=n,s=!0),"boolean"==typeof r&&r!=o.affectsData&&(o._affectsData=r,s=!0),s&&this.fire("update:"+i,o,a,t),o}var l=po.fromRange(t),u=new qa(i,l,n,r);return this._markers.set(i,u),this.fire("update:"+i,u,null,t),u}},{key:"_remove",value:function(e){var t=e instanceof qa?e.name:e,n=this._markers.get(t);return!!n&&(this._markers.delete(t),this.fire("update:"+t,n,n.getRange(),null),this._destroyMarker(n),!0)}},{key:"_refresh",value:function(e){var t=e instanceof qa?e.name:e,n=this._markers.get(t);if(!n)throw new It.b("markercollection-refresh-marker-not-exists: Marker with provided name does not exists.",this);var r=n.getRange();this.fire("update:"+t,n,r,r,n.managedUsingOperations,n.affectsData)}},{key:"getMarkersAtPosition",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=l.getRange().containsPosition(t),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"getMarkersIntersectingRange",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=null!==l.getRange().getIntersection(t),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"destroy",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this._markers.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;this._destroyMarker(o)}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this._markers=null,this.stopListening()}},{key:"getMarkersGroup",value:s.mark((function e(t){var n,r,i,o,a,l;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:n=!0,r=!1,i=void 0,e.prev=3,o=this._markers.values()[Symbol.iterator]();case 5:if(n=(a=o.next()).done){e.next=14;break}if(l=a.value,e.t0=l.name.startsWith(t+":"),!e.t0){e.next=11;break}return e.next=11,l;case 11:n=!0,e.next=5;break;case 14:e.next=20;break;case 16:e.prev=16,e.t1=e.catch(3),r=!0,i=e.t1;case 20:e.prev=20,e.prev=21,n||null==o.return||o.return();case 23:if(e.prev=23,!r){e.next=26;break}throw i;case 26:return e.finish(23);case 27:return e.finish(20);case 28:case"end":return e.stop()}}),e,this,[[3,16,20,28],[21,,23,27]])}))},{key:"_destroyMarker",value:function(e){e.stopListening(),e._detachLiveRange()}}]),e}();Yt(Ha,zt);var qa=function(){function e(t,n,r,i){f(this,e),this.name=t,this._liveRange=this._attachLiveRange(n),this._managedUsingOperations=r,this._affectsData=i}return d(e,[{key:"getStart",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.start.clone()}},{key:"getEnd",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.end.clone()}},{key:"getRange",value:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.toRange()}},{key:"is",value:function(e){return"marker"==e||"model:marker"==e}},{key:"_attachLiveRange",value:function(e){return this._liveRange&&this._detachLiveRange(),e.delegate("change:range").to(this),e.delegate("change:content").to(this),this._liveRange=e,e}},{key:"_detachLiveRange",value:function(){this._liveRange.stopDelegating("change:range",this),this._liveRange.stopDelegating("change:content",this),this._liveRange.detach(),this._liveRange=null}},{key:"managedUsingOperations",get:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._managedUsingOperations}},{key:"affectsData",get:function(){if(!this._liveRange)throw new It.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._affectsData}}]),e}();Yt(qa,zt);var Wa=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:"toNone";if(f(this,t),!(r=h(this,p(t).call(this,e,n,i))).root.is("rootElement"))throw new It.b("model-liveposition-root-not-rootelement: LivePosition's root has to be an instance of RootElement.",e);return Ya.call(o(r)),h(r)}return v(t,e),d(t,[{key:"detach",value:function(){this.stopListening()}},{key:"is",value:function(e){return"livePosition"==e||"model:livePosition"==e||l(p(t.prototype),"is",this).call(this,e)}},{key:"toPosition",value:function(){return new to(this.root,this.path.slice(),this.stickiness)}}],[{key:"fromPosition",value:function(e,t){return new this(e.root,e.path.slice(),t||e.stickiness)}}]),t}(to);function Ya(){var e=this;this.listenTo(this.root.document.model,"applyOperation",(function(t,n){var r=n[0];r.isDocumentOperation&&$a.call(e,r)}),{priority:"low"})}function $a(e){var t=this.getTransformedByOperation(e);if(!this.isEqual(t)){var n=this.toPosition();this.path=t.path,this.root=t.root,this.fire("change",n)}}Yt(Wa,zt);var Ga=function(){function e(t,n,r){f(this,e),this.model=t,this.writer=n,this.position=r,this.canMergeWith=new Set([this.position.parent]),this.schema=t.schema,this._filterAttributesOf=[],this._affectedStart=null,this._affectedEnd=null}return d(e,[{key:"handleNodes",value:function(e,t){e=Array.from(e);for(var n=0;n<e.length;n++){var r=e[n];this._handleNode(r,{isFirst:0===n&&t.isFirst,isLast:n===e.length-1&&t.isLast})}this.schema.removeDisallowedAttributes(this._filterAttributesOf,this.writer),this._filterAttributesOf=[]}},{key:"getSelectionRange",value:function(){return this.nodeToSelect?no._createOn(this.nodeToSelect):this.model.schema.getNearestSelectionRange(this.position)}},{key:"getAffectedRange",value:function(){return this._affectedStart?new no(this._affectedStart,this._affectedEnd):null}},{key:"destroy",value:function(){this._affectedStart&&this._affectedStart.detach(),this._affectedEnd&&this._affectedEnd.detach()}},{key:"_handleNode",value:function(e,t){this.schema.isObject(e)?this._handleObject(e,t):this._checkAndSplitToAllowedPosition(e,t)?(this._insert(e),this._mergeSiblingsOf(e,t)):this._handleDisallowedNode(e,t)}},{key:"_handleObject",value:function(e,t){this._checkAndSplitToAllowedPosition(e)?this._insert(e):this._tryAutoparagraphing(e,t)}},{key:"_handleDisallowedNode",value:function(e,t){e.is("element")?this.handleNodes(e.getChildren(),t):this._tryAutoparagraphing(e,t)}},{key:"_insert",value:function(e){if(!this.schema.checkChild(this.position,e))throw new It.b("insertcontent-wrong-position: Given node cannot be inserted on the given position.",this,{node:e,position:this.position});var t=Wa.fromPosition(this.position,"toNext");this._setAffectedBoundaries(this.position),this.writer.insert(e,this.position),this.position=t.toPosition(),t.detach(),this.schema.isObject(e)&&!this.schema.checkChild(this.position,"$text")?this.nodeToSelect=e:this.nodeToSelect=null,this._filterAttributesOf.push(e)}},{key:"_setAffectedBoundaries",value:function(e){this._affectedStart||(this._affectedStart=Wa.fromPosition(e,"toPrevious")),this._affectedEnd&&!this._affectedEnd.isBefore(e)||(this._affectedEnd&&this._affectedEnd.detach(),this._affectedEnd=Wa.fromPosition(e,"toNext"))}},{key:"_mergeSiblingsOf",value:function(e,t){if(e instanceof Xi){var n=this._canMergeLeft(e,t),r=this._canMergeRight(e,t),i=Wa._createBefore(e);i.stickiness="toNext";var o=Wa._createAfter(e);if(o.stickiness="toNext",n){var a=Wa.fromPosition(this.position);a.stickiness="toNext",this._affectedStart.isEqual(i)&&(this._affectedStart.detach(),this._affectedStart=Wa._createAt(i.nodeBefore,"end","toPrevious")),this.writer.merge(i),i.isEqual(this._affectedEnd)&&t.isLast&&(this._affectedEnd.detach(),this._affectedEnd=Wa._createAt(i.nodeBefore,"end","toNext")),this.position=a.toPosition(),a.detach()}if(r){if(!this.position.isEqual(o))throw new It.b("insertcontent-invalid-insertion-position",this);this.position=to._createAt(o.nodeBefore,"end");var s=Wa.fromPosition(this.position,"toPrevious");this._affectedEnd.isEqual(o)&&(this._affectedEnd.detach(),this._affectedEnd=Wa._createAt(o.nodeBefore,"end","toNext")),this.writer.merge(o),o.getShiftedBy(-1).isEqual(this._affectedStart)&&t.isFirst&&(this._affectedStart.detach(),this._affectedStart=Wa._createAt(o.nodeBefore,0,"toPrevious")),this.position=s.toPosition(),s.detach()}(n||r)&&this._filterAttributesOf.push(this.position.parent),i.detach(),o.detach()}}},{key:"_canMergeLeft",value:function(e,t){var n=e.previousSibling;return t.isFirst&&n instanceof Xi&&this.canMergeWith.has(n)&&this.model.schema.checkMerge(n,e)}},{key:"_canMergeRight",value:function(e,t){var n=e.nextSibling;return t.isLast&&n instanceof Xi&&this.canMergeWith.has(n)&&this.model.schema.checkMerge(e,n)}},{key:"_tryAutoparagraphing",value:function(e,t){var n=this.writer.createElement("paragraph");this._getAllowedIn(n,this.position.parent)&&this.schema.checkChild(n,e)&&(n._appendChild(e),this._handleNode(n,t))}},{key:"_checkAndSplitToAllowedPosition",value:function(e){var t=this._getAllowedIn(e,this.position.parent);if(!t)return!1;for(;t!=this.position.parent;){if(this.schema.isLimit(this.position.parent))return!1;if(this.position.isAtStart){var n=this.position.parent;this.position=this.writer.createPositionBefore(n),n.isEmpty&&n.parent===t&&this.writer.remove(n)}else if(this.position.isAtEnd)this.position=this.writer.createPositionAfter(this.position.parent);else{var r=this.writer.createPositionAfter(this.position.parent);this._setAffectedBoundaries(this.position),this.writer.split(this.position),this.position=r,this.canMergeWith.add(this.position.nodeAfter)}}return!0}},{key:"_getAllowedIn",value:function(e,t){return this.schema.checkChild(t,e)?t:t.parent?this._getAllowedIn(e,t.parent):null}}]),e}();function Qa(e,t,n){var r=e.createElement("paragraph");e.insert(r,t),Ka(e,n,e.createPositionAt(r,0))}function Ka(e,t,n){t instanceof yo?e.setSelection(n):t.setTo(n)}var Ja=' ,.?!:;"-()';function Xa(e,t){if("text"==t.type)return"word"===e.unit?function(e,t){var n=e.position.textNode;if(n)for(var r=e.position.offset-n.startOffset;!es(n.data,r,t)&&!ts(n,r,t);){e.next();var i=t?e.position.nodeAfter:e.position.nodeBefore;if(i&&i.is("text")){var o=i.data.charAt(t?0:i.data.length-1);Ja.includes(o)||(e.next(),n=e.position.textNode)}r=e.position.offset-n.startOffset}return e.position}(e.walker,e.isForward):function(e,t){var n=e.position.textNode;if(n)for(var r=n.data,i=e.position.offset-n.startOffset;Fa(r,i)||"character"==t&&za(r,i);)e.next(),i=e.position.offset-n.startOffset;return e.position}(e.walker,e.unit,e.isForward);if(t.type==(e.isForward?"elementStart":"elementEnd")){if(e.schema.isObject(t.item))return to._createAt(t.item,e.isForward?"after":"before");if(e.schema.checkChild(t.nextPosition,"$text"))return t.nextPosition}else{if(e.schema.isLimit(t.item))return void e.walker.skip((function(){return!0}));if(e.schema.checkChild(t.nextPosition,"$text"))return t.nextPosition}}function Za(e,t){var n=e.root,r=to._createAt(n,t?"end":0);return t?new no(e,r):new no(r,e)}function es(e,t,n){var r=t+(n?0:-1);return Ja.includes(e.charAt(r))}function ts(e,t,n){return t===(n?e.endOffset:0)}function ns(e,t){var n=[];Array.from(e.getItems({direction:"backward"})).map((function(e){return t.createRangeOn(e)})).filter((function(t){return(t.start.isAfter(e.start)||t.start.isEqual(e.start))&&(t.end.isBefore(e.end)||t.end.isEqual(e.end))})).forEach((function(e){n.push(e.start.parent),t.remove(e)})),n.forEach((function(e){for(var n=e;n.parent&&n.isEmpty;){var r=t.createRangeOn(n);n=n.parent,t.remove(r)}}))}function rs(e,t){return e.isCollapsed?function(e,t){var n=e.start,r=t.getNearestSelectionRange(n);if(!r)return null;var i=r.start;return n.isEqual(i)?null:i.nodeAfter&&t.isLimit(i.nodeAfter)?new no(i,to._createAfter(i.nodeAfter)):new no(i)}(e,t):function(e,t){var n=e.start,r=e.end,i=t.checkChild(n,"$text"),o=t.checkChild(r,"$text"),a=t.getLimitElement(n),s=t.getLimitElement(r);if(a===s){if(i&&o)return null;if(function(e,t,n){var r=e.nodeAfter&&!n.isLimit(e.nodeAfter)||n.checkChild(e,"$text"),i=t.nodeBefore&&!n.isLimit(t.nodeBefore)||n.checkChild(t,"$text");return r||i}(n,r,t)){var l=n.nodeAfter&&t.isObject(n.nodeAfter)?null:t.getNearestSelectionRange(n,"forward"),u=r.nodeBefore&&t.isObject(r.nodeBefore)?null:t.getNearestSelectionRange(r,"backward"),c=l?l.start:n,f=u?u.start:r;return new no(c,f)}}var d=a&&!a.is("rootElement"),h=s&&!s.is("rootElement");if(d||h){var p=n.nodeAfter&&r.nodeBefore&&n.nodeAfter.parent===r.nodeBefore.parent,v=d&&(!p||!os(n.nodeAfter,t)),m=h&&(!p||!os(r.nodeBefore,t)),g=n,y=r;return v&&(g=to._createBefore(is(a,t))),m&&(y=to._createAfter(is(s,t))),new no(g,y)}return null}(e,t)}function is(e,t){for(var n=e,r=n;t.isLimit(r)&&r.parent;)n=r,r=r.parent;return n}function os(e,t){return e&&t.isObject(e)}var as=function(){function e(){var t=this;f(this,e),this.markers=new Ha,this.document=new Ba(this),this.schema=new Uo,this._pendingChanges=[],this._currentWriter=null,["insertContent","deleteContent","modifySelection","getSelectedContent","applyOperation"].forEach((function(e){return t.decorate(e)})),this.on("applyOperation",(function(e,t){t[0]._validate()}),{priority:"highest"}),this.schema.register("$root",{isLimit:!0}),this.schema.register("$block",{allowIn:"$root",isBlock:!0}),this.schema.register("$text",{allowIn:"$block",isInline:!0}),this.schema.register("$clipboardHolder",{allowContentOf:"$root",isLimit:!0}),this.schema.extend("$text",{allowIn:"$clipboardHolder"}),this.schema.register("$marker"),this.schema.addChildCheck((function(e,t){if("$marker"===t.name)return!0})),function(e){e.document.registerPostFixer((function(t){return function(e,t){var n=t.document.selection,r=t.schema,i=[],o=!1,a=!0,s=!1,l=void 0;try{for(var u,c=n.getRanges()[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value,d=rs(f,r);d?(i.push(d),o=!0):i.push(f)}}catch(m){s=!0,l=m}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}if(o){var h=i;if(i.length>1){var p=i[0].start,v=i[i.length-1].end;h=[new no(p,v)]}e.setSelection(h,{backward:n.isBackward})}}(t,e)}))}(this)}return d(e,[{key:"change",value:function(e){try{return 0===this._pendingChanges.length?(this._pendingChanges.push({batch:new aa,callback:e}),this._runPendingChanges()[0]):e(this._currentWriter)}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"enqueueChange",value:function(e,t){try{"string"==typeof e?e=new aa(e):"function"==typeof e&&(t=e,e=new aa),this._pendingChanges.push({batch:e,callback:t}),1==this._pendingChanges.length&&this._runPendingChanges()}catch(e){It.b.rethrowUnexpectedError(e,this)}}},{key:"applyOperation",value:function(e){e._execute()}},{key:"insertContent",value:function(e,t,n){return function(e,t,n,r){return e.change((function(i){var o,a=(o=n?n instanceof lo||n instanceof yo?n:i.createSelection(n,r):e.document.selection).getFirstPosition();o.isCollapsed||e.deleteContent(o,{doNotAutoparagraph:!0});var s,l=new Ga(e,i,a);s=t.is("documentFragment")?t.getChildren():[t],l.handleNodes(s,{isFirst:!0,isLast:!0});var u=l.getSelectionRange();u&&(o instanceof yo?i.setSelection(u):o.setTo(u));var c=l.getAffectedRange()||e.createRange(a);return l.destroy(),c}))}(this,e,t,n)}},{key:"deleteContent",value:function(e,t){!function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if(!t.isCollapsed){var r=t.getFirstRange();if("$graveyard"!=r.root.rootName){var i=e.schema;e.change((function(e){if(n.doNotResetEntireContent||!function(e,t){var n=e.getLimitElement(t);if(!t.containsEntireContent(n))return!1;var r=t.getFirstRange();return r.start.parent!=r.end.parent&&e.checkChild(n,"paragraph")}(i,t)){var o=r.start,a=Wa.fromPosition(r.end,"toNext");if(r.start.isTouching(r.end)||e.remove(r),n.leaveUnmerged||(function e(t,n,r){var i=n.parent,o=r.parent;if(i!=o&&!t.model.schema.isLimit(i)&&!t.model.schema.isLimit(o)&&function(e,t,n){var r=new no(e,t),i=!0,o=!1,a=void 0;try{for(var s,l=r.getWalker()[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if(n.isLimit(u.item))return!1}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return!0}(n,r,t.model.schema)){for(n=t.createPositionAfter(i),(r=t.createPositionBefore(o)).isEqual(n)||t.insert(o,n),t.merge(n);r.parent.isEmpty;){var a=r.parent;r=t.createPositionBefore(a),t.remove(a)}e(t,n,r)}}(e,o,a),i.removeDisallowedAttributes(o.parent.getChildren(),e)),Ka(e,t,o),function(e,t){var n=e.checkChild(t,"$text"),r=e.checkChild(t,"paragraph");return!n&&r}(i,o)){var s=i.getNearestSelectionRange(o);n.doNotAutoparagraph&&s?Ka(e,t,s):Qa(e,o,t)}a.detach()}else!function(e,t){var n=e.model.schema.getLimitElement(t);e.remove(e.createRangeIn(n)),Qa(e,e.createPositionAt(n,0),t)}(e,t)}))}}}(this,e,t)}},{key:"modifySelection",value:function(e,t){!function(e,t){for(var n,r=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},i=e.schema,o="backward"!=r.direction,a=r.unit?r.unit:"character",s=t.focus,l=new Zi({boundaries:Za(s,o),singleCharacters:!0,direction:o?"forward":"backward"}),u={walker:l,schema:i,isForward:o,unit:a},c=function(){if(n.done)return{v:void 0};var r=Xa(u,n.value);return r?{v:void(t instanceof yo?e.change((function(e){e.setSelectionFocus(r)})):t.setFocus(r))}:void 0};n=l.next();){var f=c();if("object"===typeof f)return f.v}}(this,e,t)}},{key:"getSelectedContent",value:function(e){return function(e,t){return e.change((function(e){var n=e.createDocumentFragment(),r=t.getFirstRange();if(!r||r.isCollapsed)return n;var i,o=r.start.root,a=r.start.getCommonPath(r.end),s=o.getNodeByPath(a),l=(i=r.start.parent==r.end.parent?r:e.createRange(e.createPositionAt(s,r.start.path[a.length]),e.createPositionAt(s,r.end.path[a.length]+1))).end.offset-i.start.offset,u=!0,c=!1,f=void 0;try{for(var d,h=i.getItems({shallow:!0})[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;p.is("textProxy")?e.appendText(p.data,p.getAttributes(),n):e.append(p._clone(!0),n)}}catch(g){c=!0,f=g}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}if(i!=r){var v=r._getTransformedByMove(i.start,e.createPositionAt(n,0),l)[0],m=e.createRange(e.createPositionAt(n,0),v.start);ns(e.createRange(v.end,e.createPositionAt(n,"end")),e),ns(m,e)}return n}))}(this,e)}},{key:"hasContent",value:function(e,t){var n=e instanceof Xi?no._createIn(e):e;if(n.isCollapsed)return!1;var r=!0,i=!1,o=void 0;try{for(var a,s=this.markers.getMarkersIntersectingRange(n)[Symbol.iterator]();!(r=(a=s.next()).done);r=!0)if(a.value.affectsData)return!0}catch(m){i=!0,o=m}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}var l=(t||{}).ignoreWhitespaces,u=void 0!==l&&l,c=!0,f=!1,d=void 0;try{for(var h,p=n.getItems()[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;if(v.is("textProxy")){if(!u)return!0;if(-1!==v.data.search(/\S/))return!0}else if(this.schema.isObject(v))return!0}}catch(m){f=!0,d=m}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}return!1}},{key:"createPositionFromPath",value:function(e,t,n){return new to(e,t,n)}},{key:"createPositionAt",value:function(e,t){return to._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return to._createAfter(e)}},{key:"createPositionBefore",value:function(e){return to._createBefore(e)}},{key:"createRange",value:function(e,t){return new no(e,t)}},{key:"createRangeIn",value:function(e){return no._createIn(e)}},{key:"createRangeOn",value:function(e){return no._createOn(e)}},{key:"createSelection",value:function(e,t,n){return new lo(e,t,n)}},{key:"createBatch",value:function(e){return new aa(e)}},{key:"destroy",value:function(){this.document.destroy(),this.stopListening()}},{key:"_runPendingChanges",value:function(){var e=[];for(this.fire("_beforeChanges");this._pendingChanges.length;){var t=this._pendingChanges[0].batch;this._currentWriter=new Ea(this,t);var n=this._pendingChanges[0].callback(this._currentWriter);e.push(n),this.document._handleChangeBlock(this._currentWriter),this._pendingChanges.shift(),this._currentWriter=null}return this.fire("_afterChanges"),e}}]),e}();Yt(as,wn);var ss=function(){function e(){f(this,e),this._listener=Object.create(Hr)}return d(e,[{key:"listenTo",value:function(e){var t=this;this._listener.listenTo(e,"keydown",(function(e,n){t._listener.fire("_keydown:"+Jn(n),n)}))}},{key:"set",value:function(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=Xn(e),i=n.priority;this._listener.listenTo(this._listener,"_keydown:"+r,(function(e,n){t(n,(function(){n.preventDefault(),n.stopPropagation(),e.stop()})),e.return=!0}),{priority:i})}},{key:"press",value:function(e){return!!this._listener.fire("_keydown:"+Jn(e),e)}},{key:"destroy",value:function(){this._listener.stopListening()}}]),e}(),ls=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this))).editor=e,n}return v(t,e),d(t,[{key:"set",value:function(e,n){var r=this,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};if("string"==typeof n){var o=n;n=function(e,t){r.editor.execute(o),t()}}l(p(t.prototype),"set",this).call(this,e,n,i)}}]),t}(ss),us=function(){function t(e){var n=this;f(this,t);var r=this.constructor.builtinPlugins;this.config=new Nt(e,this.constructor.defaultConfig),this.config.define("plugins",r),this.plugins=new Ro(this,r),this.commands=new Lo;var i=this.config.get("language")||{};this.locale=new Fo({uiLanguage:"string"==typeof i?i:i.ui,contentLanguage:this.config.get("language.content")}),this.t=this.locale.t,this.set("state","initializing"),this.once("ready",(function(){return n.state="ready"}),{priority:"high"}),this.once("destroy",(function(){return n.state="destroyed"}),{priority:"high"}),this.set("isReadOnly",!1),this.model=new as,this.data=new na(this.model),this.editing=new Do(this.model),this.editing.view.document.bind("isReadOnly").to(this),this.conversion=new ra([this.editing.downcastDispatcher,this.data.downcastDispatcher],this.data.upcastDispatcher),this.conversion.addAlias("dataDowncast",this.data.downcastDispatcher),this.conversion.addAlias("editingDowncast",this.editing.downcastDispatcher),this.keystrokes=new ls(this),this.keystrokes.listenTo(this.editing.view.document)}return d(t,[{key:"initPlugins",value:function(){var e=this.config,t=e.get("plugins")||[],n=e.get("removePlugins")||[],r=e.get("extraPlugins")||[];return this.plugins.init(t.concat(r),n)}},{key:"destroy",value:function(){var e=this,t=Promise.resolve();return"initializing"==this.state&&(t=new Promise((function(t){return e.once("ready",t)}))),t.then((function(){e.fire("destroy"),e.stopListening(),e.commands.destroy()})).then((function(){return e.plugins.destroy()})).then((function(){e.model.destroy(),e.data.destroy(),e.editing.destroy(),e.keystrokes.destroy()}))}},{key:"execute",value:function(){try{var t;(t=this.commands).execute.apply(t,arguments)}catch(e){It.b.rethrowUnexpectedError(e,this)}}}]),t}();Yt(us,wn);var cs={updateSourceElement:function(){if(!this.sourceElement)throw new It.b("editor-missing-sourceelement: Cannot update the source element of a detached editor.",this);var e,t;e=this.sourceElement,t=this.data.get(),e instanceof HTMLTextAreaElement&&(e.value=t),e.innerHTML=t}},fs=function(){function e(){f(this,e)}return d(e,[{key:"getHtml",value:function(e){var t=document.implementation.createHTMLDocument("").createElement("div");return t.appendChild(e),t.innerHTML}}]),e}(),ds=function(){function e(){f(this,e),this._domParser=new DOMParser,this._domConverter=new Fr({blockFillerMode:"nbsp"}),this._htmlWriter=new fs}return d(e,[{key:"toData",value:function(e){var t=this._domConverter.viewToDom(e,document);return this._htmlWriter.getHtml(t)}},{key:"toView",value:function(e){var t=this._toDom(e);return this._domConverter.domToView(t)}},{key:"_toDom",value:function(e){for(var t=this._domParser.parseFromString(e,"text/html"),n=t.createDocumentFragment(),r=t.body.childNodes;r.length>0;)n.appendChild(r[0]);return n}}]),e}(),hs=function(){function e(t){f(this,e),this.editor=t,this._components=new Map}return d(e,[{key:"names",value:s.mark((function e(){var t,n,r,i,o,a;return s.wrap((function(e){for(;;)switch(e.prev=e.next){case 0:t=!0,n=!1,r=void 0,e.prev=3,i=this._components.values()[Symbol.iterator]();case 5:if(t=(o=i.next()).done){e.next=12;break}return a=o.value,e.next=9,a.originalName;case 9:t=!0,e.next=5;break;case 12:e.next=18;break;case 14:e.prev=14,e.t0=e.catch(3),n=!0,r=e.t0;case 18:e.prev=18,e.prev=19,t||null==i.return||i.return();case 21:if(e.prev=21,!n){e.next=24;break}throw r;case 24:return e.finish(21);case 25:return e.finish(18);case 26:case"end":return e.stop()}}),e,this,[[3,14,18,26],[19,,21,25]])}))},{key:"add",value:function(e,t){if(this.has(e))throw new It.b("componentfactory-item-exists: The item already exists in the component factory.",this,{name:e});this._components.set(ps(e),{callback:t,originalName:e})}},{key:"create",value:function(e){if(!this.has(e))throw new It.b("componentfactory-item-missing: The required component is not registered in the factory.",this,{name:e});return this._components.get(ps(e)).callback(this.editor.locale)}},{key:"has",value:function(e){return this._components.has(ps(e))}}]),e}();function ps(e){return String(e).toLowerCase()}var vs=function(){function e(){f(this,e),this.set("isFocused",!1),this.set("focusedElement",null),this._elements=new Set,this._nextEventLoopTimeout=null}return d(e,[{key:"add",value:function(e){var t=this;if(this._elements.has(e))throw new It.b("focusTracker-add-element-already-exist",this);this.listenTo(e,"focus",(function(){return t._focus(e)}),{useCapture:!0}),this.listenTo(e,"blur",(function(){return t._blur()}),{useCapture:!0}),this._elements.add(e)}},{key:"remove",value:function(e){e===this.focusedElement&&this._blur(e),this._elements.has(e)&&(this.stopListening(e),this._elements.delete(e))}},{key:"destroy",value:function(){this.stopListening()}},{key:"_focus",value:function(e){clearTimeout(this._nextEventLoopTimeout),this.focusedElement=e,this.isFocused=!0}},{key:"_blur",value:function(){var e=this;clearTimeout(this._nextEventLoopTimeout),this._nextEventLoopTimeout=setTimeout((function(){e.focusedElement=null,e.isFocused=!1}),0)}}]),e}();Yt(vs,Hr),Yt(vs,wn);var ms=function(){function e(t){var n=this;f(this,e),this.editor=t,this.componentFactory=new hs(t),this.focusTracker=new vs,this._editableElementsMap=new Map,this.listenTo(t.editing.view.document,"layoutChanged",(function(){return n.update()}))}return d(e,[{key:"update",value:function(){this.fire("update")}},{key:"destroy",value:function(){this.stopListening(),this.focusTracker.destroy();var e=!0,t=!1,n=void 0;try{for(var r,i=this._editableElementsMap.values()[Symbol.iterator]();!(e=(r=i.next()).done);e=!0)r.value.ckeditorInstance=null}catch(o){t=!0,n=o}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}this._editableElementsMap=new Map}},{key:"setEditableElement",value:function(e,t){this._editableElementsMap.set(e,t),t.ckeditorInstance||(t.ckeditorInstance=this.editor)}},{key:"getEditableElement",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"main";return this._editableElementsMap.get(e)}},{key:"getEditableElementsNames",value:function(){return this._editableElementsMap.keys()}},{key:"element",get:function(){return null}},{key:"_editableElements",get:function(){return console.warn("editor-ui-deprecated-editable-elements: The EditorUI#_editableElements property has been deprecated and will be removed in the near future.",{editorUI:this}),this._editableElementsMap}}]),e}();Yt(ms,zt),n(13);var gs=new WeakMap;function ys(e){var t=e.view,n=e.element,r=e.text,i=e.isDirectHost,o=void 0===i||i,a=t.document;gs.has(a)||(gs.set(a,new Map),a.registerPostFixer((function(e){return bs(a,e)}))),gs.get(a).set(n,{text:r,isDirectHost:o}),t.change((function(e){return bs(a,e)}))}function bs(e,t){var n=gs.get(e),r=!1,i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,f=c(u,2);ks(t,f[0],f[1])&&(r=!0)}}catch(d){o=!0,a=d}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}return r}function ks(e,t,n){var r=n.text,i=n.isDirectHost?t:function(e){if(1===e.childCount){var 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e=this.editor,t=this.view,n=e.editing.view;t.stickyPanel.bind("isActive").to(this.focusTracker,"isFocused"),t.stickyPanel.limiterElement=t.element,this._toolbarConfig.viewportTopOffset&&(t.stickyPanel.viewportTopOffset=this._toolbarConfig.viewportTopOffset),t.toolbar.fillFromConfig(this._toolbarConfig.items,this.componentFactory),function(e){var t=e.origin,n=e.originKeystrokeHandler,r=e.originFocusTracker,i=e.toolbar,o=e.beforeFocus,a=e.afterBlur;r.add(i.element),n.set("Alt+F10",(function(e,t){r.isFocused&&!i.focusTracker.isFocused&&(o&&o(),i.focus(),t())})),i.keystrokes.set("Esc",(function(e,n){i.focusTracker.isFocused&&(t.focus(),a&&a(),n())}))}({origin:n,originFocusTracker:this.focusTracker,originKeystrokeHandler:e.keystrokes,toolbar:t.toolbar})}},{key:"_initPlaceholder",value:function(){var e=this.editor,t=e.editing.view,n=t.document.getRoot(),r=e.sourceElement,i=e.config.get("placeholder")||r&&"textarea"===r.tagName.toLowerCase()&&r.getAttribute("placeholder");i&&ys({view:t,element:n,text:i,isDirectHost:!1})}},{key:"element",get:function(){return this.view.element}}]),t}(ms),xs=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,{idProperty:"viewUid"}))).on("add",(function(e,t,r){t.isRendered||t.render(),t.element&&n._parentElement&&n._parentElement.insertBefore(t.element,n._parentElement.children[r])})),n.on("remove",(function(e,t){t.element&&n._parentElement&&t.element.remove()})),n.locale=e,n._parentElement=null,n}return v(t,e),d(t,[{key:"destroy",value:function(){this.map((function(e){return e.destroy()}))}},{key:"setParent",value:function(e){this._parentElement=e}},{key:"delegate",value:function(){for(var e=this,t=arguments.length,n=new Array(t),r=0;r<t;r++)n[r]=arguments[r];if(!n.length||!n.every((function(e){return"string"==typeof e})))throw new It.b("ui-viewcollection-delegate-wrong-events: All event names must be strings.",this);return{to:function(t){var r=!0,i=!1,o=void 0;try{for(var a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=!0,c=!1,f=void 0;try{for(var d,h=n[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;l.delegate(p).to(t)}}catch(v){c=!0,f=v}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}}catch(v){i=!0,o=v}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}e.on("add",(function(e,r){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r.delegate(u).to(t)}}catch(v){o=!0,a=v}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}})),e.on("remove",(function(e,r){var i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;r.stopDelegating(u,t)}}catch(v){o=!0,a=v}finally{try{i||null==l.return||l.return()}finally{if(o)throw 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r;if(n.attributes&&(t.attributes||(t.attributes={}),js(t.attributes,n.attributes)),n.eventListeners&&(t.eventListeners||(t.eventListeners={}),js(t.eventListeners,n.eventListeners)),n.text&&(r=t.text).push.apply(r,u(n.text)),n.children&&n.children.length){if(t.children.length!=n.children.length)throw new It.b("ui-template-extend-children-mismatch: The number of children in extended definition does not match.",t);var i=0,o=!0,a=!1,s=void 0;try{for(var l,c=n.children[Symbol.iterator]();!(o=(l=c.next()).done);o=!0){var f=l.value;e(t.children[i++],f)}}catch(d){a=!0,s=d}finally{try{o||null==c.return||c.return()}finally{if(a)throw s}}}}(e,Ds(Is(t)))}}]),e}();Yt(Ts,zt);var Cs=function(){function e(t){f(this,e),Object.assign(this,t)}return d(e,[{key:"getValue",value:function(e){var t=this.observable[this.attribute];return this.callback?this.callback(t,e):t}},{key:"activateAttributeListener",value:function(e,t,n){var r=this,i=function(){return Ps(e,t,n)};return 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this._getFocusableItem(-1)}},{key:"current",get:function(){var e=this,t=null;return null===this.focusTracker.focusedElement?null:(this.focusables.find((function(n,r){var i=n.element===e.focusTracker.focusedElement;return i&&(t=r),i})),t)}}]),e}();function Xs(e){return!(!e.focus||"none"==Dr.window.getComputedStyle(e.element).display)}var Zs=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).setTemplate({tag:"span",attributes:{class:["ck","ck-toolbar__separator"]}}),n}return v(t,e),t}(Hs),el=function(){function e(t){f(this,e),this._callback=t,this._elements=new Set,this._previousRects=new Map,this._periodicCheckTimeout=null}return d(e,[{key:"observe",value:function(e){this._elements.add(e),1===this._elements.size&&this._startPeriodicCheck()}},{key:"unobserve",value:function(e){this._elements.delete(e),this._previousRects.delete(e),this._elements.size||this._stopPeriodicCheck()}},{key:"disconnect",value:function(){var e=this;this._elements.forEach((function(t){return e.unobserve(t)}))}},{key:"_startPeriodicCheck",value:function(){var e=this;this.listenTo(Dr.window,"resize",(function(){e._checkElementRectsAndExecuteCallback()})),function t(){e._checkElementRectsAndExecuteCallback(),e._periodicCheckTimeout=setTimeout(t,100)}()}},{key:"_stopPeriodicCheck",value:function(){clearTimeout(this._periodicCheckTimeout),this.stopListening(),this._previousRects.clear()}},{key:"_checkElementRectsAndExecuteCallback",value:function(){var e=[],t=!0,n=!1,r=void 0;try{for(var i,o=this._elements[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._hasRectChanged(a)&&e.push({target:a,contentRect:this._previousRects.get(a)})}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}e.length&&this._callback(e)}},{key:"_hasRectChanged",value:function(e){if(!e.ownerDocument.body.contains(e))return!1;var t=new Ii(e),n=this._previousRects.get(e),r=!n||!n.isEqual(t);return this._previousRects.set(e,t),r}}]),e}();Yt(el,Hr);var tl=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate;return n.set("isVisible",!1),n.set("position","se"),n.children=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-reset","ck-dropdown__panel",r.to("position",(function(e){return"ck-dropdown__panel_".concat(e)})),r.if("isVisible","ck-dropdown__panel-visible")]},children:n.children,on:{selectstart:r.to((function(e){return e.preventDefault()}))}}),n}return v(t,e),d(t,[{key:"focus",value:function(){this.children.length&&this.children.first.focus()}},{key:"focusLast",value:function(){if(this.children.length){var e=this.children.last;"function"==typeof e.focusLast?e.focusLast():e.focus()}}}]),t}(Hs);function nl(e){var t=e.element,n=e.target,r=e.positions,i=e.limiter,o=e.fitInViewport;H(n)&&(n=n()),H(i)&&(i=i());var a,s,l=function(e){for(;e&&"html"!=e.tagName.toLowerCase();){if("static"!=Dr.window.getComputedStyle(e).position)return e;e=e.parentElement}return null}(t.parentElement),u=new Ii(t),f=new Ii(n);if(i||o){var d=function(e,t,n,r,i){var o,a,s=0,l=0,u=n.getArea();return e.some((function(e){var f,d,h=rl(e,t,n),p=c(h,2),v=p[0],m=p[1];if(r)if(i){var g=r.getIntersection(i);f=g?g.getIntersectionArea(m):0}else f=r.getIntersectionArea(m);function y(){l=d,s=f,o=m,a=v}return i&&(d=i.getIntersectionArea(m)),i&&!r?d>l&&y():!i&&r?f>s&&y():d>l&&f>=s?y():d>=l&&f>s&&y(),f===u})),o?[a,o]:null}(r,f,u,i&&new Ii(i).getVisible(),o&&new Ii(Dr.window))||rl(r[0],f,u),h=c(d,2);s=h[0],a=h[1]}else{var p=rl(r[0],f,u),v=c(p,2);s=v[0],a=v[1]}var m=il(a),g=m.left,y=m.top;if(l){var b=il(new Ii(l)),k=Ni(l);g-=b.left,y-=b.top,g+=l.scrollLeft,y+=l.scrollTop,g-=k.left,y-=k.top}return{left:g,top:y,name:s}}function rl(e,t,n){var r=e(t,n),i=r.left,o=r.top;return[r.name,n.clone().moveTo(i,o)]}function il(e){var 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e=this;l(p(t.prototype),"render",this).call(this),this.listenTo(this.buttonView,"open",(function(){e.isOpen=!e.isOpen})),this.panelView.bind("isVisible").to(this,"isOpen"),this.on("change:isOpen",(function(){e.isOpen&&("auto"===e.panelPosition?e.panelView.position=t._getOptimalPosition({element:e.panelView.element,target:e.buttonView.element,fitInViewport:!0,positions:e._panelPositions}).name:e.panelView.position=e.panelPosition)})),this.keystrokes.listenTo(this.element),this.focusTracker.add(this.element);var n=function(t,n){e.isOpen&&(e.buttonView.focus(),e.isOpen=!1,n())};this.keystrokes.set("arrowdown",(function(t,n){e.buttonView.isEnabled&&!e.isOpen&&(e.isOpen=!0,n())})),this.keystrokes.set("arrowright",(function(t,n){e.isOpen&&n()})),this.keystrokes.set("arrowleft",n),this.keystrokes.set("esc",n)}},{key:"focus",value:function(){this.buttonView.focus()}},{key:"_panelPositions",get:function(){var e=t.defaultPanelPositions,n=e.southEast,r=e.southWest,i=e.northEast,o=e.northWest;return"ltr"===this.locale.uiLanguageDirection?[n,r,i,o]:[r,n,o,i]}}]),t}(Hs);ol.defaultPanelPositions={southEast:function(e){return{top:e.bottom,left:e.left,name:"se"}},southWest:function(e,t){return{top:e.bottom,left:e.left-t.width+e.width,name:"sw"}},northEast:function(e,t){return{top:e.top-t.height,left:e.left,name:"ne"}},northWest:function(e,t){return{top:e.bottom-t.height,left:e.left-t.width+e.width,name:"nw"}}},ol._getOptimalPosition=nl,n(25);var al=function(e){function t(){var e;f(this,t);var n=(e=h(this,p(t).call(this))).bindTemplate;return e.set("content",""),e.set("viewBox","0 0 20 20"),e.set("fillColor",""),e.setTemplate({tag:"svg",ns:"http://www.w3.org/2000/svg",attributes:{class:["ck","ck-icon"],viewBox:n.to("viewBox")}}),e}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this),this._updateXMLContent(),this._colorFillPaths(),this.on("change:content",(function(){e._updateXMLContent(),e._colorFillPaths()})),this.on("change:fillColor",(function(){e._colorFillPaths()}))}},{key:"_updateXMLContent",value:function(){if(this.content){var e=(new DOMParser).parseFromString(this.content.trim(),"image/svg+xml").querySelector("svg"),t=e.getAttribute("viewBox");for(t&&(this.viewBox=t),this.element.innerHTML="";e.childNodes.length>0;)this.element.appendChild(e.childNodes[0])}}},{key:"_colorFillPaths",value:function(){var e=this;this.fillColor&&this.element.querySelectorAll(".ck-icon__fill").forEach((function(t){t.style.fill=e.fillColor}))}}]),t}(Hs);n(27);var sl=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("text",""),n.set("position","s");var r=n.bindTemplate;return n.setTemplate({tag:"span",attributes:{class:["ck","ck-tooltip",r.to("position",(function(e){return"ck-tooltip_"+e})),r.if("text","ck-hidden",(function(e){return!e.trim()}))]},children:[{tag:"span",attributes:{class:["ck","ck-tooltip__text"]},children:[{text:r.to("text")}]}]}),n}return v(t,e),t}(Hs);n(29);var ll=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate,i=Rt();return n.set("class"),n.set("labelStyle"),n.set("icon"),n.set("isEnabled",!0),n.set("isOn",!1),n.set("isVisible",!0),n.set("isToggleable",!1),n.set("keystroke"),n.set("label"),n.set("tabindex",-1),n.set("tooltip"),n.set("tooltipPosition","s"),n.set("type","button"),n.set("withText",!1),n.set("withKeystroke",!1),n.children=n.createCollection(),n.tooltipView=n._createTooltipView(),n.labelView=n._createLabelView(i),n.iconView=new 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v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.icon&&(this.iconView.bind("content").to(this,"icon"),this.children.add(this.iconView)),this.children.add(this.tooltipView),this.children.add(this.labelView),this.withKeystroke&&this.children.add(this.keystrokeView)}},{key:"focus",value:function(){this.element.focus()}},{key:"_createTooltipView",value:function(){var e=new sl;return e.bind("text").to(this,"_tooltipString"),e.bind("position").to(this,"tooltipPosition"),e}},{key:"_createLabelView",value:function(e){var t=new Hs,n=this.bindTemplate;return t.setTemplate({tag:"span",attributes:{class:["ck","ck-button__label"],style:n.to("labelStyle"),id:"ck-editor__aria-label_".concat(e)},children:[{text:this.bindTemplate.to("label")}]}),t}},{key:"_createKeystrokeView",value:function(){var e=new Hs;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__keystroke"]},children:[{text:this.bindTemplate.to("keystroke",(function(e){return Zn(e)}))}]}),e}},{key:"_getTooltipString",value:function(e,t,n){return e?"string"==typeof e?e:(n&&(n=Zn(n)),e instanceof Function?e(t,n):"".concat(t).concat(n?" (".concat(n,")"):"")):""}}]),t}(Hs),ul=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).arrowView=n._createArrowView(),n.extendTemplate({attributes:{"aria-haspopup":!0}}),n.delegate("execute").to(o(n),"open"),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.children.add(this.arrowView)}},{key:"_createArrowView",value:function(){var e=new al;return e.content='<svg viewBox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"><path d="M.941 4.523a.75.75 0 1 1 1.06-1.06l3.006 3.005 3.005-3.005a.75.75 0 1 1 1.06 1.06l-3.549 3.55a.75.75 0 0 1-1.168-.136L.941 4.523z"/></svg>',e.extendTemplate({attributes:{class:"ck-dropdown__arrow"}}),e}}]),t}(ll);n(31);var cl=function(e){function t(){var e;return f(this,t),(e=h(this,p(t).call(this))).items=e.createCollection(),e.focusTracker=new vs,e.keystrokes=new ss,e._focusCycler=new Js({focusables:e.items,focusTracker:e.focusTracker,keystrokeHandler:e.keystrokes,actions:{focusPrevious:"arrowup",focusNext:"arrowdown"}}),e.setTemplate({tag:"ul",attributes:{class:["ck","ck-reset","ck-list"]},children:e.items}),e}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=!0,r=!1,i=void 0;try{for(var o,a=this.items[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this.focusTracker.add(s.element)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.items.on("add",(function(t,n){e.focusTracker.add(n.element)})),this.items.on("remove",(function(t,n){e.focusTracker.remove(n.element)})),this.keystrokes.listenTo(this.element)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"focusLast",value:function(){this._focusCycler.focusLast()}}]),t}(Hs),fl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).children=n.createCollection(),n.setTemplate({tag:"li",attributes:{class:["ck","ck-list__item"]},children:n.children}),n}return v(t,e),d(t,[{key:"focus",value:function(){this.children.first.focus()}}]),t}(Hs),dl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).setTemplate({tag:"li",attributes:{class:["ck","ck-list__separator"]}}),n}return v(t,e),t}(Hs);n(33);var hl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).isToggleable=!0,n.toggleSwitchView=n._createToggleView(),n.extendTemplate({attributes:{class:"ck-switchbutton"}}),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.children.add(this.toggleSwitchView)}},{key:"_createToggleView",value:function(){var e=new Hs;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__toggle"]},children:[{tag:"span",attributes:{class:["ck","ck-button__toggle__inner"]}}]}),e}}]),t}(ll);function pl(e){var t=e.emitter,n=e.activator,r=e.callback,i=e.contextElements;t.listenTo(document,"mousedown",(function(e,t){var o=t.target;if(n()){var a=!0,s=!1,l=void 0;try{for(var u,c=i[Symbol.iterator]();!(a=(u=c.next()).done);a=!0)if(u.value.contains(o))return}catch(f){s=!0,l=f}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}r()}}))}function vl(e){var t=new(arguments.length>1&&void 0!==arguments[1]?arguments[1]:ul)(e),n=new tl(e),r=new ol(e,t,n);return t.bind("isEnabled").to(r),t instanceof ul?t.bind("isOn").to(r,"isOpen"):t.arrowView.bind("isOn").to(r,"isOpen"),function(e){(function(e){e.on("render",(function(){pl({emitter:e,activator:function(){return e.isOpen},callback:function(){e.isOpen=!1},contextElements:[e.element]})}))})(e),function(e){e.on("execute",(function(t){t.source instanceof hl||(e.isOpen=!1)}))}(e),function(e){e.keystrokes.set("arrowdown",(function(t,n){e.isOpen&&(e.panelView.focus(),n())})),e.keystrokes.set("arrowup",(function(t,n){e.isOpen&&(e.panelView.focusLast(),n())}))}(e)}(r),r}function ml(e,t){var n=e.locale,r=e.listView=new cl(n);r.items.bindTo(t).using((function(e){var t=e.type,r=e.model;if("separator"===t)return new dl(n);if("button"===t||"switchbutton"===t){var i,o,a=new fl(n);return(i=o="button"===t?new ll(n):new hl(n)).bind.apply(i,u(Object.keys(r))).to(r),o.delegate("execute").to(a),a.children.add(o),a}})),e.panelView.children.add(r),r.items.delegate("execute").to(e)}n(35),n(37),n(39);var gl=function(e){function t(e,n){var r;f(this,t);var i,a=(r=h(this,p(t).call(this,e))).bindTemplate,s=r.t;return r.options=n||{},r.set("ariaLabel",s("bq")),r.items=r.createCollection(),r.focusTracker=new vs,r.keystrokes=new ss,r.set("class"),r.itemsView=new yl(e),r.children=r.createCollection(),r.children.add(r.itemsView),r.focusables=r.createCollection(),r._focusCycler=new Js({focusables:r.focusables,focusTracker:r.focusTracker,keystrokeHandler:r.keystrokes,actions:{focusPrevious:["arrowleft","arrowup"],focusNext:["arrowright","arrowdown"]}}),r.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar",a.to("class")],role:"toolbar","aria-label":a.to("ariaLabel")},children:r.children,on:{mousedown:(i=o(r),i.bindTemplate.to((function(e){e.target===i.element&&e.preventDefault()})))}}),r._behavior=r.options.shouldGroupWhenFull?new kl(o(r)):new bl(o(r)),r}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=!0,r=!1,i=void 0;try{for(var o,a=this.items[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this.focusTracker.add(s.element)}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.items.on("add",(function(t,n){e.focusTracker.add(n.element)})),this.items.on("remove",(function(t,n){e.focusTracker.remove(n.element)})),this.keystrokes.listenTo(this.element),this._behavior.render(this)}},{key:"destroy",value:function(){return this._behavior.destroy(),l(p(t.prototype),"destroy",this).call(this)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"focusLast",value:function(){this._focusCycler.focusLast()}},{key:"fillFromConfig",value:function(e,t){var n=this;e.map((function(e){"|"==e?n.items.add(new Zs):t.has(e)?n.items.add(t.create(e)):console.warn(Object(It.a)("toolbarview-item-unavailable: The requested toolbar item is unavailable."),{name:e})}))}}]),t}(Hs),yl=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).children=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar__items"]},children:n.children}),n}return v(t,e),t}(Hs),bl=function(){function e(t){f(this,e);var n=t.bindTemplate;t.set("isVertical",!1),t.itemsView.children.bindTo(t.items).using((function(e){return e})),t.focusables.bindTo(t.items).using((function(e){return e})),t.extendTemplate({attributes:{class:[n.if("isVertical","ck-toolbar_vertical")]}})}return d(e,[{key:"render",value:function(){}},{key:"destroy",value:function(){}}]),e}(),kl=function(){function e(t){var n=this;f(this,e),this.viewChildren=t.children,this.viewFocusables=t.focusables,this.viewItemsView=t.itemsView,this.viewFocusTracker=t.focusTracker,this.viewLocale=t.locale,this.ungroupedItems=t.createCollection(),this.groupedItems=t.createCollection(),this.groupedItemsDropdown=this._createGroupedItemsDropdown(),this.resizeObserver=null,this.cachedPadding=null,t.itemsView.children.bindTo(this.ungroupedItems).using((function(e){return e})),this.ungroupedItems.on("add",this._updateFocusCycleableItems.bind(this)),this.ungroupedItems.on("remove",this._updateFocusCycleableItems.bind(this)),t.children.on("add",this._updateFocusCycleableItems.bind(this)),t.children.on("remove",this._updateFocusCycleableItems.bind(this)),t.items.on("add",(function(e,t,r){r>n.ungroupedItems.length?n.groupedItems.add(t,r-n.ungroupedItems.length):n.ungroupedItems.add(t,r),n._updateGrouping()})),t.items.on("remove",(function(e,t,r){r>n.ungroupedItems.length?n.groupedItems.remove(t):n.ungroupedItems.remove(t),n._updateGrouping()})),t.extendTemplate({attributes:{class:["ck-toolbar_grouping"]}})}return d(e,[{key:"render",value:function(e){this.viewElement=e.element,this._enableGroupingOnResize()}},{key:"destroy",value:function(){this.groupedItemsDropdown.destroy(),this.resizeObserver.disconnect()}},{key:"_updateGrouping",value:function(){if(this.viewElement.ownerDocument.body.contains(this.viewElement)){for(var e;this._areItemsOverflowing;)this._groupLastItem(),e=!0;if(!e&&this.groupedItems.length){for(;this.groupedItems.length&&!this._areItemsOverflowing;)this._ungroupFirstItem();this._areItemsOverflowing&&this._groupLastItem()}}}},{key:"_enableGroupingOnResize",value:function(){var e,t,n=this;this.resizeObserver=(t=function(t){var r=c(t,1)[0];e&&e===r.contentRect.width||(n._updateGrouping(),e=r.contentRect.width)},"function"==typeof Dr.window.ResizeObserver?new Dr.window.ResizeObserver(t):new el(t)),this.resizeObserver.observe(this.viewElement),this._updateGrouping()}},{key:"_groupLastItem",value:function(){this.groupedItems.length||(this.viewChildren.add(new Zs),this.viewChildren.add(this.groupedItemsDropdown),this.viewFocusTracker.add(this.groupedItemsDropdown.element)),this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last),0)}},{key:"_ungroupFirstItem",value:function(){this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first)),this.groupedItems.length||(this.viewChildren.remove(this.groupedItemsDropdown),this.viewChildren.remove(this.viewChildren.last),this.viewFocusTracker.remove(this.groupedItemsDropdown.element))}},{key:"_createGroupedItemsDropdown",value:function(){var e=this.viewLocale,t=e.t,n=vl(e);return n.class="ck-toolbar__grouped-dropdown",n.panelPosition="ltr"===e.uiLanguageDirection?"sw":"se",function(e,t){var n=e.locale,r=n.t,i=e.toolbarView=new gl(n);i.set("ariaLabel",r("bm")),e.extendTemplate({attributes:{class:["ck-toolbar-dropdown"]}}),[].map((function(e){return i.items.add(e)})),e.panelView.children.add(i),i.items.delegate("execute").to(e)}(n),n.buttonView.set({label:t("br"),tooltip:!0,icon:'<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="9.5" cy="4.5" r="1.5"/><circle cx="9.5" cy="10.5" r="1.5"/><circle cx="9.5" cy="16.5" r="1.5"/></svg>\n'}),n.toolbarView.items.bindTo(this.groupedItems).using((function(e){return e})),n}},{key:"_updateFocusCycleableItems",value:function(){var e=this;this.viewFocusables.clear(),this.ungroupedItems.map((function(t){e.viewFocusables.add(t)})),this.groupedItems.length&&this.viewFocusables.add(this.groupedItemsDropdown)}},{key:"_areItemsOverflowing",get:function(){if(!this.ungroupedItems.length)return!1;var e=this.viewElement,t=this.viewLocale.uiLanguageDirection,n=new Ii(e.lastChild),r=new Ii(e);if(!this.cachedPadding){var i=Dr.window.getComputedStyle(e),o="ltr"===t?"paddingRight":"paddingLeft";this.cachedPadding=Number.parseInt(i[o])}return"ltr"===t?n.right>r.right-this.cachedPadding:n.left<r.left+this.cachedPadding}}]),e}();n(41);var wl=function(e){function t(e,n){var r,i=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};return f(this,t),(r=h(this,p(t).call(this,e))).stickyPanel=new Ks(e),r.toolbar=new gl(e,{shouldGroupWhenFull:i.shouldToolbarGroupWhenFull}),r.editable=new $s(e,n),r}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.stickyPanel.content.add(this.toolbar),this.top.add(this.stickyPanel),this.main.add(this.editable)}}]),t}(Ys),_l=function(e){function t(e,n){var r;f(this,t),r=h(this,p(t).call(this,n)),Mt(e)&&(r.sourceElement=e),r.data.processor=new ds,r.model.document.createRoot();var i=!r.config.get("toolbar.shouldNotGroupWhenFull"),a=new wl(r.locale,r.editing.view,{shouldToolbarGroupWhenFull:i});return r.ui=new 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cannot be used together with initial data passed in Editor.create().",null);var t=n.initialData||function(e){return Mt(e)?(t=e)instanceof HTMLTextAreaElement?t.value:t.innerHTML:e;var t}(e);return i.data.init(t)})).then((function(){return i.fire("ready")})).then((function(){return i})))}))}}]),t}(us);Yt(_l,{setData:function(e){this.data.set(e)},getData:function(e){return this.data.get(e)}}),Yt(_l,cs);var xl=function(){function e(t){f(this,e),this.editor=t}return d(e,[{key:"destroy",value:function(){this.stopListening()}}]),e}();Yt(xl,wn);var Tl=function(){function e(t){f(this,e),this.files=function(e){var t=e.files?Array.from(e.files):[],n=e.items?Array.from(e.items):[];return t.length?t:n.filter((function(e){return"file"===e.kind})).map((function(e){return e.getAsFile()}))}(t),this._native=t}return d(e,[{key:"getData",value:function(e){return this._native.getData(e)}},{key:"setData",value:function(e,t){this._native.setData(e,t)}},{key:"types",get:function(){return this._native.types}}]),e}(),Cl=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).document;function i(e,t){t.preventDefault();var n=t.dropRange?[t.dropRange]:Array.from(r.selection.getRanges()),i=new Dt(r,"clipboardInput");r.fire(i,{dataTransfer:t.dataTransfer,targetRanges:n}),i.stop.called&&t.stopPropagation()}return n.domEventType=["paste","copy","cut","drop","dragover"],n.listenTo(r,"paste",i,{priority:"low"}),n.listenTo(r,"drop",i,{priority:"low"}),n}return v(t,e),d(t,[{key:"onDomEvent",value:function(e){var t={dataTransfer:new Tl(e.clipboardData?e.clipboardData:e.dataTransfer)};"drop"==e.type&&(t.dropRange=function(e,t){var n,r=t.target.ownerDocument,i=t.clientX,o=t.clientY;return r.caretRangeFromPoint&&r.caretRangeFromPoint(i,o)?n=r.caretRangeFromPoint(i,o):t.rangeParent&&((n=r.createRange()).setStart(t.rangeParent,t.rangeOffset),n.collapse(!0)),n?e.domConverter.domRangeToView(n):e.document.selection.getFirstRange()}(this.view,e)),this.fire(e.type,e,t)}}]),t}(di),Sl=["figcaption","li"],El=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.model.document,r=t.editing.view,i=r.document;function o(e,r){var o=r.dataTransfer;r.preventDefault();var a=t.data.toView(t.model.getSelectedContent(n.selection));i.fire("clipboardOutput",{dataTransfer:o,content:a,method:e.name})}this._htmlDataProcessor=new ds,r.addObserver(Cl),this.listenTo(i,"clipboardInput",(function(e){t.isReadOnly&&e.stop()}),{priority:"highest"}),this.listenTo(i,"clipboardInput",(function(t,n){var i=n.dataTransfer,o="";i.getData("text/html")?o=function(e){return e.replace(/<span(?: class="Apple-converted-space"|)>(\s+)<\/span>/g,(function(e,t){return 1==t.length?" ":t}))}(i.getData("text/html")):i.getData("text/plain")&&(o=function(e){return(e=e.replace(/</g,"<").replace(/>/g,">").replace(/\n/g,"</p><p>").replace(/^\s/," ").replace(/\s$/," ").replace(/\s\s/g,"  ")).indexOf("</p><p>")>-1&&(e="<p>".concat(e,"</p>")),e}(i.getData("text/plain"))),o=e._htmlDataProcessor.toView(o),e.fire("inputTransformation",{content:o,dataTransfer:i}),r.scrollToTheSelection()}),{priority:"low"}),this.listenTo(this,"inputTransformation",(function(t,n){if(!n.content.isEmpty){var r=e.editor.data,i=e.editor.model,o=r.toModel(n.content,"$clipboardHolder");if(0==o.childCount)return;i.insertContent(o)}}),{priority:"low"}),this.listenTo(i,"copy",o,{priority:"low"}),this.listenTo(i,"cut",(function(e,n){t.isReadOnly?n.preventDefault():o(e,n)}),{priority:"low"}),this.listenTo(i,"clipboardOutput",(function(r,i){i.content.isEmpty||(i.dataTransfer.setData("text/html",e._htmlDataProcessor.toData(i.content)),i.dataTransfer.setData("text/plain",function e(t){var n="";if(t.is("text")||t.is("textProxy"))n=t.data;else if(t.is("img")&&t.hasAttribute("alt"))n=t.getAttribute("alt");else{var r=null,i=!0,o=!1,a=void 0;try{for(var s,l=t.getChildren()[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value,c=e(u);r&&(r.is("containerElement")||u.is("containerElement"))&&(Sl.includes(r.name)||Sl.includes(u.name)?n+="\n":n+="\n\n"),n+=c,r=u}}catch(f){o=!0,a=f}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}return n}(i.content))),"cut"==i.method&&t.model.deleteContent(n.selection)}),{priority:"low"})}}],[{key:"pluginName",get:function(){return"Clipboard"}}]),t}(xl),Al=function(){function e(t){var n=this;f(this,e),this.editor=t,this.set("value",void 0),this.set("isEnabled",!1),this._disableStack=new 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5:if(n=(a=o.next()).done){s.next=14;break}if(l=a.value,s.t0=l&&e.getAttributeProperties(l[0]).copyOnEnter,!s.t0){s.next=11;break}return s.next=11,l;case 11:n=!0,s.next=5;break;case 14:s.next=20;break;case 16:s.prev=16,s.t1=s.catch(3),r=!0,i=s.t1;case 20:s.prev=20,s.prev=21,n||null==o.return||o.return();case 23:if(s.prev=23,!r){s.next=26;break}throw i;case 26:return s.finish(23);case 27:return s.finish(20);case 28:case"end":return s.stop()}}),g,null,[[3,16,20,28],[21,,23,27]])}Yt(Al,wn);var Nl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document;t.change((function(r){!function(e,t,n,r){var i=n.isCollapsed,o=n.getFirstRange(),a=o.start.parent,s=o.end.parent;if(r.isLimit(a)||r.isLimit(s))i||a!=s||e.deleteContent(n);else if(i){var l=Ml(t.model.schema,n.getAttributes());Ol(t,o.start),t.setSelectionAttribute(l)}else{var u=!(o.start.isAtStart&&o.end.isAtEnd),c=a==s;e.deleteContent(n,{leaveUnmerged:u}),u&&(c?Ol(t,n.focus):t.setSelection(s,0))}}(e.editor.model,r,n.selection,t.schema),e.fire("afterExecute",{writer:r})}))}}]),t}(Al);function Ol(e,t){e.split(t),e.setSelection(t.parent.nextSibling,0)}var Il=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).document;return r.on("keydown",(function(e,t){var i;n.isEnabled&&t.keyCode==Kn.enter&&(r.once("enter",(function(e){return i=e}),{priority:"highest"}),r.fire("enter",new fi(r,t.domEvent,{isSoft:t.shiftKey})),i&&i.stop.called&&e.stop())})),n}return v(t,e),d(t,[{key:"observe",value:function(){}}]),t}(Yr),Dl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.editing.view,n=t.document;t.addObserver(Il),e.commands.add("enter",new 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r=t.getFirstRange(),i=r.start.parent,o=r.end.parent;return!jl(i,e)&&!jl(o,e)||i===o}(e.schema,t.selection)}}]),t}(Al);function Ll(e,t){var n=e.createElement("softBreak");e.insert(n,t),e.setSelection(n,"after")}function jl(e,t){return!e.is("rootElement")&&(t.isLimit(e)||jl(e.parent,t))}for(var Fl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.conversion,r=e.editing.view,i=r.document;t.register("softBreak",{allowWhere:"$text",isInline:!0}),n.for("upcast").elementToElement({model:"softBreak",view:"br"}),n.for("downcast").elementToElement({model:"softBreak",view:function(e,t){return t.createEmptyElement("br")}}),r.addObserver(Il),e.commands.add("shiftEnter",new Rl(e)),this.listenTo(i,"enter",(function(t,n){n.preventDefault(),n.isSoft&&(e.execute("shiftEnter"),r.scrollToTheSelection())}),{priority:"low"})}}],[{key:"pluginName",get:function(){return"ShiftEnter"}}]),t}(xl),zl=function(){function e(t){var n=this,r=arguments.length>1&&void 0!==arguments[1]?arguments[1]:20;f(this,e),this.model=t,this.size=0,this.limit=r,this.isLocked=!1,this._changeCallback=function(e,t){"transparent"!=t.type&&t!==n._batch&&n._reset(!0)},this._selectionChangeCallback=function(){n._reset()},this.model.document.on("change",this._changeCallback),this.model.document.selection.on("change:range",this._selectionChangeCallback),this.model.document.selection.on("change:attribute",this._selectionChangeCallback)}return d(e,[{key:"input",value:function(e){this.size+=e,this.size>=this.limit&&this._reset(!0)}},{key:"lock",value:function(){this.isLocked=!0}},{key:"unlock",value:function(){this.isLocked=!1}},{key:"destroy",value:function(){this.model.document.off("change",this._changeCallback),this.model.document.selection.off("change:range",this._selectionChangeCallback),this.model.document.selection.off("change:attribute",this._selectionChangeCallback)}},{key:"_reset",value:function(e){this.isLocked&&!e||(this._batch=null,this.size=0)}},{key:"batch",get:function(){return this._batch||(this._batch=this.model.createBatch()),this._batch}}]),e}(),Vl=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e)))._buffer=new zl(e.model,n),r._batches=new WeakSet,r}return v(t,e),d(t,[{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this._buffer.destroy()}},{key:"execute",value:function(){var e=this,t=arguments.length>0&&void 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e.forEach((function(e){"equal"==e?(o(),i++):"insert"==e?(a("insert")?n.values.push(t[i]):(o(),n={type:"insert",index:i,values:[t[i]]}),i++):a("delete")?n.howMany++:(o(),n={type:"delete",index:i,howMany:1})})),o(),r;function o(){n&&(r.push(n),n=null)}function a(e){return n&&n.type==e}}(Sr(e.oldChildren,e.newChildren,ql),e.newChildren);if(!(t.length>1)){var n=t[0];return n.values[0]&&n.values[0].is("text")?n:void 0}}}function ql(e,t){return e&&e.is("text")&&t&&t.is("text")?e.data===t.data:e===t}var Wl=function(){function e(t){f(this,e),this.editor=t,this.editing=this.editor.editing}return d(e,[{key:"handle",value:function(e,t){if(function(e){if(0==e.length)return!1;var t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if("children"===a.type&&!Hl(a))return!0}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return!1}(e))this._handleContainerChildrenMutations(e,t);else{var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;this._handleTextMutation(s,t),this._handleTextNodeInsertion(s)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}},{key:"_handleContainerChildrenMutations",value:function(e,t){var n=function(e){var t=e.map((function(e){return e.node})).reduce((function(e,t){return e.getCommonAncestor(t,{includeSelf:!0})}));if(t)return t.getAncestors({includeSelf:!0,parentFirst:!0}).find((function(e){return e.is("containerElement")||e.is("rootElement")}))}(e);if(n){var r=this.editor.editing.view.domConverter.mapViewToDom(n),i=new Fr,o=this.editor.data.toModel(i.domToView(r)).getChild(0),a=this.editor.editing.mapper.toModelElement(n);if(a){var s=Array.from(o.getChildren()),l=Array.from(a.getChildren()),u=s[s.length-1],c=l[l.length-1];u&&u.is("softBreak")&&c&&!c.is("softBreak")&&s.pop();var f=this.editor.model.schema;if(Yl(s,f)&&Yl(l,f)){var d=s.map((function(e){return e.is("text")?e.data:"@"})).join("").replace(/\u00A0/g," "),h=l.map((function(e){return e.is("text")?e.data:"@"})).join("").replace(/\u00A0/g," ");if(h!==d){var p=$l(Sr(h,d)),v=p.firstChangeAt,m=p.insertions,g=p.deletions,y=null;t&&(y=this.editing.mapper.toModelRange(t.getFirstRange()));var b=d.substr(v,m),k=this.editor.model.createRange(this.editor.model.createPositionAt(a,v),this.editor.model.createPositionAt(a,v+g));this.editor.execute("input",{text:b,range:k,resultRange:y})}}}}}},{key:"_handleTextMutation",value:function(e,t){if("text"==e.type){var n=e.newText.replace(/\u00A0/g," "),r=e.oldText.replace(/\u00A0/g," ");if(r!==n){var i=$l(Sr(r,n)),o=i.firstChangeAt,a=i.insertions,s=i.deletions,l=null;t&&(l=this.editing.mapper.toModelRange(t.getFirstRange()));var u=this.editing.view.createPositionAt(e.node,o),c=this.editing.mapper.toModelPosition(u),f=this.editor.model.createRange(c,c.getShiftedBy(s)),d=n.substr(o,a);this.editor.execute("input",{text:d,range:f,resultRange:l})}}}},{key:"_handleTextNodeInsertion",value:function(e){if("children"==e.type){var t=Hl(e),n=this.editing.view.createPositionAt(e.node,t.index),r=this.editing.mapper.toModelPosition(n),i=t.values[0].data;this.editor.execute("input",{text:i.replace(/\u00A0/g," "),range:this.editor.model.createRange(r)})}}}]),e}();function Yl(e,t){return e.every((function(e){return t.isInline(e)}))}function $l(e){for(var t=null,n=null,r=0;r<e.length;r++)"equal"!=e[r]&&(t=null===t?r:t,n=r);for(var i=0,o=0,a=t;a<=n;a++)"insert"!=e[a]&&i++,"delete"!=e[a]&&o++;return{insertions:o,deletions:i,firstChangeAt:t}}var Gl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=new Vl(e,e.config.get("typing.undoStep")||20);e.commands.add("input",t),function(e){var t=null,n=e.model,r=e.editing.view,i=e.commands.get("input");function o(e){var o=n.document,s=r.document.isComposing,l=t&&t.isEqual(o.selection);t=null,i.isEnabled&&(function(e){return!!e.ctrlKey||Bl.includes(e.keyCode)}(e)||o.selection.isCollapsed||s&&229===e.keyCode||!s&&229===e.keyCode&&l||a())}function a(){var e=i.buffer;e.lock(),n.enqueueChange(e.batch,(function(){n.deleteContent(n.document.selection)})),e.unlock()}$n.isAndroid?r.document.on("beforeinput",(function(e,t){return o(t)}),{priority:"lowest"}):r.document.on("keydown",(function(e,t){return o(t)}),{priority:"lowest"}),r.document.on("compositionstart",(function(){var e=n.document,t=1!==e.selection.rangeCount||e.selection.getFirstRange().isFlat;e.selection.isCollapsed||t||a()}),{priority:"lowest"}),r.document.on("compositionend",(function(){t=n.createSelection(n.document.selection)}),{priority:"lowest"})}(e),function(e){e.editing.view.document.on("mutations",(function(t,n,r){new Wl(e).handle(n,r)}))}(e)}},{key:"isInput",value:function(e){return this.editor.commands.get("input")._batches.has(e)}}],[{key:"pluginName",get:function(){return"Input"}}]),t}(xl),Ql=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).direction=n,r._buffer=new zl(e.model,e.config.get("typing.undoStep")),r}return v(t,e),d(t,[{key:"execute",value:function(){var e=this,t=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=this.editor.model,r=n.document;n.enqueueChange(this._buffer.batch,(function(i){e._buffer.lock();var o=i.createSelection(t.selection||r.selection),a=o.isCollapsed;if(o.isCollapsed&&n.modifySelection(o,{direction:e.direction,unit:t.unit}),e._shouldEntireContentBeReplacedWithParagraph(t.sequence||1))e._replaceEntireContentWithParagraph(i);else if(!o.isCollapsed){var s=0;o.getFirstRange().getMinimalFlatRanges().forEach((function(e){s+=Rn(e.getWalker({singleCharacters:!0,ignoreElementEnd:!0,shallow:!0}))})),n.deleteContent(o,{doNotResetEntireContent:a}),e._buffer.input(s),i.setSelection(o),e._buffer.unlock()}}))}},{key:"_shouldEntireContentBeReplacedWithParagraph",value:function(e){if(e>1)return!1;var t=this.editor.model,n=t.document.selection,r=t.schema.getLimitElement(n);if(!n.isCollapsed||!n.containsEntireContent(r))return!1;if(!t.schema.checkChild(r,"paragraph"))return!1;var i=r.getChild(0);return!i||"paragraph"!==i.name}},{key:"_replaceEntireContentWithParagraph",value:function(e){var t=this.editor.model,n=t.document.selection,r=t.schema.getLimitElement(n),i=e.createElement("paragraph");e.remove(e.createRangeIn(r)),e.insert(i,r),e.setSelection(i,0)}},{key:"buffer",get:function(){return this._buffer}}]),t}(Al),Kl=function(e){function t(e){var n;f(this,t),n=h(this,p(t).call(this,e));var r=e.document,i=0;function o(e,t,n){var i;r.once("delete",(function(e){return i=e}),{priority:Number.POSITIVE_INFINITY}),r.fire("delete",new fi(r,t,n)),i&&i.stop.called&&e.stop()}return r.on("keyup",(function(e,t){t.keyCode!=Kn.delete&&t.keyCode!=Kn.backspace||(i=0)})),r.on("keydown",(function(e,t){var n={};if(t.keyCode==Kn.delete)n.direction="forward",n.unit="character";else{if(t.keyCode!=Kn.backspace)return;n.direction="backward",n.unit="codePoint"}var r=$n.isMac?t.altKey:t.ctrlKey;n.unit=r?"word":n.unit,n.sequence=++i,o(e,t.domEvent,n)})),$n.isAndroid&&r.on("beforeinput",(function(t,n){if("deleteContentBackward"==n.domEvent.inputType){var r={unit:"codepoint",direction:"backward",sequence:1},i=n.domTarget.ownerDocument.defaultView.getSelection();i.anchorNode==i.focusNode&&i.anchorOffset+1!=i.focusOffset&&(r.selectionToRemove=e.domConverter.domSelectionToView(i)),o(t,n.domEvent,r)}})),n}return v(t,e),d(t,[{key:"observe",value:function(){}}]),t}(Yr),Jl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.editing.view,n=t.document;if(t.addObserver(Kl),e.commands.add("forwardDelete",new Ql(e,"forward")),e.commands.add("delete",new Ql(e,"backward")),this.listenTo(n,"delete",(function(n,r){var i={unit:r.unit,sequence:r.sequence};if(r.selectionToRemove){var o=e.model.createSelection(),a=[],s=!0,l=!1,u=void 0;try{for(var c,f=r.selectionToRemove.getRanges()[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;a.push(e.editing.mapper.toModelRange(d))}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}o.setTo(a),i.selection=o}e.execute("forward"==r.direction?"forwardDelete":"delete",i),r.preventDefault(),t.scrollToTheSelection()})),$n.isAndroid){var r=null;this.listenTo(n,"delete",(function(e,t){var n=t.domTarget.ownerDocument.defaultView.getSelection();r={anchorNode:n.anchorNode,anchorOffset:n.anchorOffset,focusNode:n.focusNode,focusOffset:n.focusOffset}}),{priority:"lowest"}),this.listenTo(n,"keyup",(function(e,t){if(r){var n=t.domTarget.ownerDocument.defaultView.getSelection();n.collapse(r.anchorNode,r.anchorOffset),n.extend(r.focusNode,r.focusOffset),r=null}}))}}}],[{key:"pluginName",get:function(){return"Delete"}}]),t}(xl),Xl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[Gl,Jl]}},{key:"pluginName",get:function(){return"Typing"}}]),t}(xl),Zl=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"clone",value:function(){return new t(this.baseVersion)}},{key:"getReversed",value:function(){return new t(this.baseVersion+1)}},{key:"_execute",value:function(){}},{key:"type",get:function(){return"noop"}}],[{key:"className",get:function(){return"NoOperation"}}]),t}(sa),eu=new Map;function tu(e,t,n){var r=eu.get(e);r||(r=new Map,eu.set(e,r)),r.set(t,n)}function nu(e){return[e]}function ru(e,t){var n=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},r=function(e,t){var n=eu.get(e);return n&&n.has(t)?n.get(t):nu}(e.constructor,t.constructor);try{return r(e=e.clone(),t,n)}catch(e){throw e}}function iu(e,t,n){e=e.slice(),t=t.slice();var r=new ou(n.document,n.useRelations,n.forceWeakRemove);r.setOriginalOperations(e),r.setOriginalOperations(t);var i=r.originalOperations;if(0==e.length||0==t.length)return{operationsA:e,operationsB:t,originalOperations:i};var o=new WeakMap,a=!0,s=!1,l=void 0;try{for(var c,f=e[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var d=c.value;o.set(d,0)}}catch(M){s=!0,l=M}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}for(var h={nextBaseVersionA:e[e.length-1].baseVersion+1,nextBaseVersionB:t[t.length-1].baseVersion+1,originalOperationsACount:e.length,originalOperationsBCount:t.length},p=0;p<e.length;){var v,m,g=e[p],y=o.get(g);if(y!=t.length){var b=t[y],k=ru(g,b,r.getContext(g,b,!0)),w=ru(b,g,r.getContext(b,g,!1));r.updateRelation(g,b),r.setOriginalOperations(k,g),r.setOriginalOperations(w,b);var _=!0,x=!1,T=void 0;try{for(var C,S=k[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;o.set(E,y+w.length)}}catch(M){x=!0,T=M}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}(v=e).splice.apply(v,[p,1].concat(u(k))),(m=t).splice.apply(m,[y,1].concat(u(w)))}else p++}if(n.padWithNoOps){var A=e.length-h.originalOperationsACount,P=t.length-h.originalOperationsBCount;su(e,P-A),su(t,A-P)}return au(e,h.nextBaseVersionB),au(t,h.nextBaseVersionA),{operationsA:e,operationsB:t,originalOperations:i}}var ou=function(){function e(t,n){var r=arguments.length>2&&void 0!==arguments[2]&&arguments[2];f(this,e),this.originalOperations=new Map,this._history=t.history,this._useRelations=n,this._forceWeakRemove=!!r,this._relations=new Map}return d(e,[{key:"setOriginalOperations",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:null,n=t?this.originalOperations.get(t):null,r=!0,i=!1,o=void 0;try{for(var a,s=e[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;this.originalOperations.set(l,n||l)}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}}},{key:"updateRelation",value:function(e,t){switch(e.constructor){case ba:switch(t.constructor){case Ta:e.targetPosition.isEqual(t.sourcePosition)||t.movedRange.containsPosition(e.targetPosition)?this._setRelation(e,t,"insertAtSource"):e.targetPosition.isEqual(t.deletionPosition)?this._setRelation(e,t,"insertBetween"):e.targetPosition.isAfter(t.sourcePosition)&&this._setRelation(e,t,"moveTargetAfter");break;case ba:e.targetPosition.isEqual(t.sourcePosition)||e.targetPosition.isBefore(t.sourcePosition)?this._setRelation(e,t,"insertBefore"):this._setRelation(e,t,"insertAfter")}break;case Ca:switch(t.constructor){case Ta:e.splitPosition.isBefore(t.sourcePosition)&&this._setRelation(e,t,"splitBefore");break;case ba:(e.splitPosition.isEqual(t.sourcePosition)||e.splitPosition.isBefore(t.sourcePosition))&&this._setRelation(e,t,"splitBefore")}break;case Ta:switch(t.constructor){case Ta:e.targetPosition.isEqual(t.sourcePosition)||this._setRelation(e,t,"mergeTargetNotMoved"),e.sourcePosition.isEqual(t.targetPosition)&&this._setRelation(e,t,"mergeSourceNotMoved"),e.sourcePosition.isEqual(t.sourcePosition)&&this._setRelation(e,t,"mergeSameElement");break;case Ca:e.sourcePosition.isEqual(t.splitPosition)&&this._setRelation(e,t,"splitAtSource")}break;case wa:var n=e.newRange;if(!n)return;switch(t.constructor){case ba:var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany),i=r.containsPosition(n.start)||r.start.isEqual(n.start),o=r.containsPosition(n.end)||r.end.isEqual(n.end);!i&&!o||r.containsRange(n)||this._setRelation(e,t,{side:i?"left":"right",path:i?n.start.path.slice():n.end.path.slice()});break;case Ta:var 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r=e.range._getTransformedByMergeOperation(t);return r.isCollapsed||n.push(r),n.map((function(t){return new ga(t,e.key,e.oldValue,e.newValue,e.baseVersion)}))})),tu(ga,ba,(function(e,t){return function(e,t){var n=no._createFromPositionAndShift(t.sourcePosition,t.howMany),r=null,i=[];n.containsRange(e,!0)?r=e:e.start.hasSameParentAs(n.start)?(i=e.getDifference(n),r=e.getIntersection(n)):i=[e];var o=[],a=!0,s=!1,l=void 0;try{for(var c,f=i[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var d=c.value;d=d._getTransformedByDeletion(t.sourcePosition,t.howMany);var h=t.getMovedRangeStart(),p=d.start.hasSameParentAs(h);d=d._getTransformedByInsertion(h,t.howMany,p),o.push.apply(o,u(d))}}catch(v){s=!0,l=v}finally{try{a||null==f.return||f.return()}finally{if(s)throw l}}return r&&o.push(r._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany,!1)[0]),o}(e.range,t).map((function(t){return new 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e.position=e.position._getTransformedByMoveOperation(t),[e]})),tu(ka,Ca,(function(e,t){return e.position=e.position._getTransformedBySplitOperation(t),[e]})),tu(ka,Ta,(function(e,t){return e.position=e.position._getTransformedByMergeOperation(t),[e]})),tu(wa,ka,(function(e,t){return e.oldRange&&(e.oldRange=e.oldRange._getTransformedByInsertOperation(t)[0]),e.newRange&&(e.newRange=e.newRange._getTransformedByInsertOperation(t)[0]),[e]})),tu(wa,wa,(function(e,t,n){if(e.name==t.name){if(!n.aIsStrong)return[new Zl(0)];e.oldRange=t.newRange?t.newRange.clone():null}return[e]})),tu(wa,Ta,(function(e,t){return e.oldRange&&(e.oldRange=e.oldRange._getTransformedByMergeOperation(t)),e.newRange&&(e.newRange=e.newRange._getTransformedByMergeOperation(t)),[e]})),tu(wa,ba,(function(e,t,n){if(e.oldRange&&(e.oldRange=no._createFromRanges(e.oldRange._getTransformedByMoveOperation(t))),e.newRange){if(n.abRelation){var r=no._createFromRanges(e.newRange._getTransformedByMoveOperation(t));if("left"==n.abRelation.side&&t.targetPosition.isEqual(e.newRange.start))return e.newRange.start.path=n.abRelation.path,e.newRange.end=r.end,[e];if("right"==n.abRelation.side&&t.targetPosition.isEqual(e.newRange.end))return e.newRange.start=r.start,e.newRange.end.path=n.abRelation.path,[e]}e.newRange=no._createFromRanges(e.newRange._getTransformedByMoveOperation(t))}return[e]})),tu(wa,Ca,(function(e,t,n){if(e.oldRange&&(e.oldRange=e.oldRange._getTransformedBySplitOperation(t)),e.newRange){if(n.abRelation){var r=e.newRange._getTransformedBySplitOperation(t);return e.newRange.start.isEqual(t.splitPosition)&&n.abRelation.wasStartBeforeMergedElement?e.newRange.start=to._createAt(t.insertionPosition):e.newRange.start.isEqual(t.splitPosition)&&!n.abRelation.wasInLeftElement&&(e.newRange.start=to._createAt(t.moveTargetPosition)),e.newRange.end.isEqual(t.splitPosition)&&n.abRelation.wasInRightElement?e.newRange.end=to._createAt(t.moveTargetPosition):e.newRange.end.isEqual(t.splitPosition)&&n.abRelation.wasEndBeforeMergedElement?e.newRange.end=to._createAt(t.insertionPosition):e.newRange.end=r.end,[e]}e.newRange=e.newRange._getTransformedBySplitOperation(t)}return[e]})),tu(Ta,ka,(function(e,t){return e.sourcePosition.hasSameParentAs(t.position)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByInsertOperation(t),e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t),[e]})),tu(Ta,Ta,(function(e,t,n){if(e.sourcePosition.isEqual(t.sourcePosition)&&e.targetPosition.isEqual(t.targetPosition)){if(n.bWasUndone){var r=t.graveyardPosition.path.slice();return r.push(0),e.sourcePosition=new to(t.graveyardPosition.root,r),e.howMany=0,[e]}return[new Zl(0)]}if(e.sourcePosition.isEqual(t.sourcePosition)&&!e.targetPosition.isEqual(t.targetPosition)&&!n.bWasUndone&&"splitAtSource"!=n.abRelation){var i="$graveyard"==e.targetPosition.root.rootName,o="$graveyard"==t.targetPosition.root.rootName;if(o&&!i||(!i||o)&&n.aIsStrong){var a=t.targetPosition._getTransformedByMergeOperation(t),s=e.targetPosition._getTransformedByMergeOperation(t);return[new ba(a,e.howMany,s,0)]}return[new Zl(0)]}return e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMergeOperation(t),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),e.graveyardPosition.isEqual(t.graveyardPosition)&&n.aIsStrong||(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]})),tu(Ta,ba,(function(e,t,n){var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany);return"remove"==t.type&&!n.bWasUndone&&!n.forceWeakRemove&&e.deletionPosition.hasSameParentAs(t.sourcePosition)&&r.containsPosition(e.sourcePosition)?[new Zl(0)]:(e.sourcePosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.sourcePosition.hasSameParentAs(t.sourcePosition)&&(e.howMany-=t.howMany),e.sourcePosition=e.sourcePosition._getTransformedByMoveOperation(t),e.targetPosition=e.targetPosition._getTransformedByMoveOperation(t),e.graveyardPosition.isEqual(t.targetPosition)||(e.graveyardPosition=e.graveyardPosition._getTransformedByMoveOperation(t)),[e])})),tu(Ta,Ca,(function(e,t,n){if(t.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByDeletion(t.graveyardPosition,1),e.deletionPosition.isEqual(t.graveyardPosition)&&(e.howMany=t.howMany)),e.targetPosition.isEqual(t.splitPosition)){var r=0!=t.howMany,i=t.graveyardPosition&&e.deletionPosition.isEqual(t.graveyardPosition);if(r||i||"mergeTargetNotMoved"==n.abRelation)return e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),[e]}if(e.sourcePosition.isEqual(t.splitPosition)){if("mergeSourceNotMoved"==n.abRelation)return e.howMany=0,e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e];if("mergeSameElement"==n.abRelation||e.sourcePosition.offset>0)return e.sourcePosition=t.moveTargetPosition.clone(),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]}return e.sourcePosition.hasSameParentAs(t.splitPosition)&&(e.howMany=t.splitPosition.offset),e.sourcePosition=e.sourcePosition._getTransformedBySplitOperation(t),e.targetPosition=e.targetPosition._getTransformedBySplitOperation(t),[e]})),tu(ba,ka,(function(e,t){var n=no._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByInsertOperation(t,!1)[0];return e.sourcePosition=n.start,e.howMany=n.end.offset-n.start.offset,e.targetPosition.isEqual(t.position)||(e.targetPosition=e.targetPosition._getTransformedByInsertOperation(t)),[e]})),tu(ba,ba,(function(e,t,n){var r,i=no._createFromPositionAndShift(e.sourcePosition,e.howMany),o=no._createFromPositionAndShift(t.sourcePosition,t.howMany),a=n.aIsStrong,s=!n.aIsStrong;if("insertBefore"==n.abRelation||"insertAfter"==n.baRelation?s=!0:"insertAfter"!=n.abRelation&&"insertBefore"!=n.baRelation||(s=!1),r=e.targetPosition.isEqual(t.targetPosition)&&s?e.targetPosition._getTransformedByDeletion(t.sourcePosition,t.howMany):e.targetPosition._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),uu(e,t)&&uu(t,e))return[t.getReversed()];if(i.containsPosition(t.targetPosition)&&i.containsRange(o,!0))return i.start=i.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),i.end=i.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),cu([i],r);if(o.containsPosition(e.targetPosition)&&o.containsRange(i,!0))return i.start=i.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),i.end=i.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),cu([i],r);var l=$t(e.sourcePosition.getParentPath(),t.sourcePosition.getParentPath());if("prefix"==l||"extension"==l)return i.start=i.start._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),i.end=i.end._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany),cu([i],r);"remove"!=e.type||"remove"==t.type||n.aWasUndone||n.forceWeakRemove?"remove"==e.type||"remove"!=t.type||n.bWasUndone||n.forceWeakRemove||(a=!1):a=!0;var c=[],f=i.getDifference(o),d=!0,h=!1,p=void 0;try{for(var v,m=f[Symbol.iterator]();!(d=(v=m.next()).done);d=!0){var g=v.value;g.start=g.start._getTransformedByDeletion(t.sourcePosition,t.howMany),g.end=g.end._getTransformedByDeletion(t.sourcePosition,t.howMany);var y="same"==$t(g.start.getParentPath(),t.getMovedRangeStart().getParentPath()),b=g._getTransformedByInsertion(t.getMovedRangeStart(),t.howMany,y);c.push.apply(c,u(b))}}catch(w){h=!0,p=w}finally{try{d||null==m.return||m.return()}finally{if(h)throw p}}var k=i.getIntersection(o);return null!==k&&a&&(k.start=k.start._getCombined(t.sourcePosition,t.getMovedRangeStart()),k.end=k.end._getCombined(t.sourcePosition,t.getMovedRangeStart()),0===c.length?c.push(k):1==c.length?o.start.isBefore(i.start)||o.start.isEqual(i.start)?c.unshift(k):c.push(k):c.splice(1,0,k)),0===c.length?[new Zl(e.baseVersion)]:cu(c,r)})),tu(ba,Ca,(function(e,t,n){var r=e.targetPosition.clone();e.targetPosition.isEqual(t.insertionPosition)&&t.graveyardPosition&&"moveTargetAfter"!=n.abRelation||(r=e.targetPosition._getTransformedBySplitOperation(t));var i=no._createFromPositionAndShift(e.sourcePosition,e.howMany);if(i.end.isEqual(t.insertionPosition))return t.graveyardPosition||e.howMany++,e.targetPosition=r,[e];if(i.start.hasSameParentAs(t.splitPosition)&&i.containsPosition(t.splitPosition)){var o=new no(t.splitPosition,i.end);return o=o._getTransformedBySplitOperation(t),cu([new no(i.start,t.splitPosition),o],r)}e.targetPosition.isEqual(t.splitPosition)&&"insertAtSource"==n.abRelation&&(r=t.moveTargetPosition),e.targetPosition.isEqual(t.insertionPosition)&&"insertBetween"==n.abRelation&&(r=e.targetPosition);var a=[i._getTransformedBySplitOperation(t)];if(t.graveyardPosition){var s=i.start.isEqual(t.graveyardPosition)||i.containsPosition(t.graveyardPosition);e.howMany>1&&s&&!n.aWasUndone&&a.push(no._createFromPositionAndShift(t.insertionPosition,1))}return cu(a,r)})),tu(ba,Ta,(function(e,t,n){var r=no._createFromPositionAndShift(e.sourcePosition,e.howMany);if(t.deletionPosition.hasSameParentAs(e.sourcePosition)&&r.containsPosition(t.sourcePosition))if("remove"!=e.type||n.forceWeakRemove){if(1==e.howMany)return n.bWasUndone?(e.sourcePosition=t.graveyardPosition.clone(),e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]):[new Zl(0)]}else if(!n.aWasUndone){var i=[],o=t.graveyardPosition.clone(),a=t.targetPosition._getTransformedByMergeOperation(t);e.howMany>1&&(i.push(new ba(e.sourcePosition,e.howMany-1,e.targetPosition,0)),o=o._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1),a=a._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany-1));var s=t.deletionPosition._getCombined(e.sourcePosition,e.targetPosition),l=new ba(o,1,s,0),u=l.getMovedRangeStart().path.slice();u.push(0);var c=new to(l.targetPosition.root,u);a=a._getTransformedByMove(o,s,1);var f=new ba(a,t.howMany,c,0);return i.push(l),i.push(f),i}var d=no._createFromPositionAndShift(e.sourcePosition,e.howMany)._getTransformedByMergeOperation(t);return e.sourcePosition=d.start,e.howMany=d.end.offset-d.start.offset,e.targetPosition=e.targetPosition._getTransformedByMergeOperation(t),[e]})),tu(_a,ka,(function(e,t){return e.position=e.position._getTransformedByInsertOperation(t),[e]})),tu(_a,Ta,(function(e,t){return e.position.isEqual(t.deletionPosition)?(e.position=t.graveyardPosition.clone(),e.position.stickiness="toNext",[e]):(e.position=e.position._getTransformedByMergeOperation(t),[e])})),tu(_a,ba,(function(e,t){return e.position=e.position._getTransformedByMoveOperation(t),[e]})),tu(_a,_a,(function(e,t,n){if(e.position.isEqual(t.position)){if(!n.aIsStrong)return[new Zl(0)];e.oldName=t.newName}return[e]})),tu(_a,Ca,(function(e,t){if("same"==$t(e.position.path,t.splitPosition.getParentPath())&&!t.graveyardPosition){var n=new _a(e.position.getShiftedBy(1),e.oldName,e.newName,0);return[e,n]}return 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a.insertionPosition=o,e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),e.graveyardPosition=a.insertionPosition.clone(),e.graveyardPosition.stickiness="toNext",[a,e]}return e.splitPosition.hasSameParentAs(t.deletionPosition)&&!e.splitPosition.isAfter(t.deletionPosition)&&e.howMany--,e.splitPosition.hasSameParentAs(t.targetPosition)&&(e.howMany+=t.howMany),e.splitPosition=e.splitPosition._getTransformedByMergeOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),e.graveyardPosition&&(e.graveyardPosition=e.graveyardPosition._getTransformedByMergeOperation(t)),[e]})),tu(Ca,ba,(function(e,t,n){var r=no._createFromPositionAndShift(t.sourcePosition,t.howMany);if(e.graveyardPosition){var i=r.start.isEqual(e.graveyardPosition)||r.containsPosition(e.graveyardPosition);if(!n.bWasUndone&&i){var 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e.howMany-=u,e.splitPosition.hasSameParentAs(t.targetPosition)&&e.splitPosition.offset<t.targetPosition.offset&&(e.howMany+=t.howMany),e.splitPosition=t.sourcePosition.clone(),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]}return!e.splitPosition.isEqual(t.targetPosition)||"insertAtSource"!=n.baRelation&&"splitBefore"!=n.abRelation?(t.sourcePosition.isEqual(t.targetPosition)||(e.splitPosition.hasSameParentAs(t.sourcePosition)&&e.splitPosition.offset<=t.sourcePosition.offset&&(e.howMany-=t.howMany),e.splitPosition.hasSameParentAs(t.targetPosition)&&e.splitPosition.offset<t.targetPosition.offset&&(e.howMany+=t.howMany)),e.splitPosition.stickiness="toNone",e.splitPosition=e.splitPosition._getTransformedByMoveOperation(t),e.splitPosition.stickiness="toNext",e.graveyardPosition?e.insertionPosition=e.insertionPosition._getTransformedByMoveOperation(t):e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]):(e.howMany+=t.howMany,e.splitPosition=e.splitPosition._getTransformedByDeletion(t.sourcePosition,t.howMany),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e])})),tu(Ca,Ca,(function(e,t,n){if(e.splitPosition.isEqual(t.splitPosition)){if(!e.graveyardPosition&&!t.graveyardPosition)return[new 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to(t.insertionPosition.root,a);return[e,new ba(e.insertionPosition,1,s,0)]}return e.splitPosition.hasSameParentAs(t.splitPosition)&&e.splitPosition.offset<t.splitPosition.offset&&(e.howMany-=t.howMany),e.splitPosition=e.splitPosition._getTransformedBySplitOperation(t),e.insertionPosition=Ca.getInsertionPosition(e.splitPosition),[e]}));var fu=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e)))._stack=[],n._createdBatches=new WeakSet,n.refresh(),n}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this._stack.length>0}},{key:"addBatch",value:function(e){var t=this.editor.model.document.selection,n={ranges:t.hasOwnRange?Array.from(t.getRanges()):[],isBackward:t.isBackward};this._stack.push({batch:e,selection:n}),this.refresh()}},{key:"clearStack",value:function(){this._stack=[],this.refresh()}},{key:"_restoreSelection",value:function(e,t,n){var r=this.editor.model,i=r.document,o=[],a=!0,s=!1,l=void 0;try{for(var u,c=e[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=du(u.value,n).find((function(e){return e.start.root!=i.graveyard}));f&&o.push(f)}}catch(d){s=!0,l=d}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}o.length&&r.change((function(e){e.setSelection(o,{backward:t})}))}},{key:"_undo",value:function(e,t){var n=this.editor.model,r=n.document;this._createdBatches.add(t);var i=e.operations.slice().filter((function(e){return e.isDocumentOperation}));i.reverse();var o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f=c.baseVersion+1,d=Array.from(r.history.getOperations(f)),h=iu([c.getReversed()],d,{useRelations:!0,document:this.editor.model.document,padWithNoOps:!1,forceWeakRemove:!0}).operationsA,p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var 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e=0,n=!0,r=!1,i=void 0;try{for(var o,a=t.loaders[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s.uploadTotal&&(e+=s.uploadTotal)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}t.uploadTotal=e})),n}},{key:"destroyLoader",value:function(e){var t=this,n=e instanceof xu?e:this.getLoader(e);n._destroy(),this.loaders.remove(n),this._loadersMap.forEach((function(e,r){e===n&&t._loadersMap.delete(r)}))}},{key:"_updatePendingAction",value:function(){var e=this.editor.plugins.get(ku);if(this.loaders.length){if(!this._pendingAction){var t=this.editor.t,n=function(e){return"".concat(t("ay")," ").concat(parseInt(e),"%.")};this._pendingAction=e.add(n(this.uploadedPercent)),this._pendingAction.bind("message").to(this,"uploadedPercent",n)}}else e.remove(this._pendingAction),this._pendingAction=null}}],[{key:"pluginName",get:function(){return"FileRepository"}},{key:"requires",get:function(){return[ku]}}]),t}(xl);Yt(_u,wn);var xu=function(){function 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this._filePromiseWrapper?this._filePromiseWrapper.promise.then((function(t){return e._filePromiseWrapper?t:null})):Promise.resolve(null)}},{key:"data",get:function(){return this._reader.data}}]),e}();Yt(xu,wn);var Tu="ckCsrfToken",Cu=40,Su="abcdefghijklmnopqrstuvwxyz0123456789",Eu=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor.config.get("ckfinder.uploadUrl");t&&(this.editor.plugins.get(_u).createUploadAdapter=function(n){return new Au(n,t,e.editor.t)})}}],[{key:"requires",get:function(){return[_u]}},{key:"pluginName",get:function(){return"CKFinderUploadAdapter"}}]),t}(xl),Au=function(){function e(t,n,r){f(this,e),this.loader=t,this.url=n,this.t=r}return d(e,[{key:"upload",value:function(){var e=this;return this.loader.file.then((function(t){return new 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o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value.split("=");if(decodeURIComponent(s[0].trim().toLowerCase())===e)return decodeURIComponent(s[1])}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return null}(Tu);return n&&n.length==Cu||(n=function(e){var t="",n=new Uint8Array(e);window.crypto.getRandomValues(n);for(var r=0;r<n.length;r++){var i=Su.charAt(n[r]%Su.length);t+=Math.random()>.5?i.toUpperCase():i}return t}(Cu),e=Tu,t=n,document.cookie=encodeURIComponent(e)+"="+encodeURIComponent(t)+";path=/"),n}()),this.xhr.send(t)}}]),e}(),Pu=function(){function e(t,n,r){f(this,e);var i,o=null;"function"==typeof r?i=r:(o=t.commands.get(r),i=function(){t.execute(r)}),t.model.document.on("change",(function(e,r){if((!o||o.isEnabled)&&"transparent"!=r.type){var a=Array.from(t.model.document.differ.getChanges()),s=a[0];if(1==a.length&&"insert"===s.type&&"$text"==s.name&&1==s.length){var l=s.position.parent;if(l.is("paragraph")&&1===l.childCount){var u=n.exec(l.getChild(0).data);u&&t.model.enqueueChange((function(e){var t=e.createPositionAt(l,0),n=e.createPositionAt(l,u[0].length),r=new po(t,n);!1!==i({match:u})&&e.remove(r),r.detach()}))}}}}))}return d(e,null,[{key:"pluginName",get:function(){return"BlockAutoformatEditing"}}]),e}(),Mu=function(){function e(t,n,r){var i,o,a,s;f(this,e),n instanceof RegExp?i=n:a=n,"string"==typeof r?o=r:s=r,a=a||function(e){for(var t,n=[],r=[];null!==(t=i.exec(e))&&!(t&&t.length<4);){var o=t,a=o.index,s=o[1],l=o[2],u=o[3],c=s+l+u,f=[a+=t[0].length-c.length,a+s.length],d=[a+s.length+l.length,a+s.length+l.length+u.length];n.push(f),n.push(d),r.push([a+s.length,a+s.length+l.length])}return{remove:n,format:r}},s=s||function(e,n){var r=t.model.schema.getValidRanges(n,o),i=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(i=(l=u.next()).done);i=!0){var 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u=s.value;hc(n,t,{src:u})}}catch(c){o=!0,a=c}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}}))}}]),t}(Al),mc=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.t,r=e.conversion;e.editing.view.addObserver(Ku),t.register("image",{isObject:!0,isBlock:!0,allowWhere:"$block",allowAttributes:["alt","src","srcset"]}),r.for("dataDowncast").elementToElement({model:"image",view:function(e,t){return gc(t)}}),r.for("editingDowncast").elementToElement({model:"image",view:function(e,t){return function(e,t,n){return t.setCustomProperty("image",!0,e),ac(e,t,{label:function(){var t=e.getChild(0).getAttribute("alt");return t?"".concat(t," ").concat(n):n}})}(gc(t),t,n("i"))}}),r.for("downcast").add(Ju("src")).add(Ju("alt")).add(function(){return function(t){t.on("attribute:srcset:image",e)};function e(e,t,n){if(n.consumable.consume(t.item,e.name)){var r=n.writer,i=n.mapper.toViewElement(t.item).getChild(0);if(null===t.attributeNewValue){var o=t.attributeOldValue;o.data&&(r.removeAttribute("srcset",i),r.removeAttribute("sizes",i),o.width&&r.removeAttribute("width",i))}else{var a=t.attributeNewValue;a.data&&(r.setAttribute("srcset",a.data,i),r.setAttribute("sizes","100vw",i),a.width&&r.setAttribute("width",a.width,i))}}}}()),r.for("upcast").elementToElement({view:{name:"img",attributes:{src:!0}},model:function(e,t){return t.createElement("image",{src:e.getAttribute("src")})}}).attributeToAttribute({view:{name:"img",key:"alt"},model:"alt"}).attributeToAttribute({view:{name:"img",key:"srcset"},model:{key:"srcset",value:function(e){var t={data:e.getAttribute("srcset")};return e.hasAttribute("width")&&(t.width=e.getAttribute("width")),t}}}).add(function(){return function(t){t.on("element:figure",e)};function e(e,t,n){if(n.consumable.test(t.viewItem,{name:!0,classes:"image"})){var r=Array.from(t.viewItem.getChildren()).find((function(e){return e.is("img")}));if(r&&r.hasAttribute("src")&&n.consumable.test(r,{name:!0})){var i=n.convertItem(r,t.modelCursor),o=Uu(i.modelRange.getItems());o&&(n.convertChildren(t.viewItem,n.writer.createPositionAt(o,0)),t.modelRange=i.modelRange,t.modelCursor=i.modelCursor)}}}}()),e.commands.add("imageInsert",new vc(e))}}],[{key:"pluginName",get:function(){return"ImageEditing"}}]),t}(xl);function gc(e){var t=e.createEmptyElement("img"),n=e.createContainerElement("figure",{class:"image"});return e.insert(e.createPositionAt(n,0),t),n}function yc(e,t,n){return n.createRange(bc(e,t,!0,n),bc(e,t,!1,n))}function bc(e,t,n,r){for(var i=e.textNode||(n?e.nodeBefore:e.nodeAfter),o=null;i&&i.getAttribute("linkHref")==t;)o=i,i=n?i.previousSibling:i.nextSibling;return o?r.createPositionAt(o,n?"before":"after"):e}var kc=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).manualDecorators=new Fn,n}return v(t,e),d(t,[{key:"restoreManualDecoratorStates",value:function(){var e=!0,t=!1,n=void 0;try{for(var r,i=this.manualDecorators[Symbol.iterator]();!(e=(r=i.next()).done);e=!0){var o=r.value;o.value=this._getDecoratorStateFromModel(o.id)}}catch(a){t=!0,n=a}finally{try{e||null==i.return||i.return()}finally{if(t)throw n}}}},{key:"refresh",value:function(){var e=this.editor.model,t=e.document;this.value=t.selection.getAttribute("linkHref");var n=!0,r=!1,i=void 0;try{for(var o,a=this.manualDecorators[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;s.value=this._getDecoratorStateFromModel(s.id)}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}this.isEnabled=e.schema.checkAttributeInSelection(t.selection,"linkHref")}},{key:"execute",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},n=this.editor.model,r=n.document.selection,i=[],o=[];for(var a in t)t[a]?i.push(a):o.push(a);n.change((function(t){if(r.isCollapsed){var a=r.getFirstPosition();if(r.hasAttribute("linkHref")){var s=yc(a,r.getAttribute("linkHref"),n);t.setAttribute("linkHref",e,s),i.forEach((function(e){t.setAttribute(e,!0,s)})),o.forEach((function(e){t.removeAttribute(e,s)})),t.setSelection(s)}else if(""!==e){var l=$i(r.getAttributes());l.set("linkHref",e),i.forEach((function(e){l.set(e,!0)}));var u=t.createText(e,l);n.insertContent(u,a),t.setSelection(t.createRangeOn(u))}}else{var c=n.schema.getValidRanges(r.getRanges(),"linkHref"),f=!0,d=!1,h=void 0;try{for(var p,v=function(){var n=p.value;t.setAttribute("linkHref",e,n),i.forEach((function(e){t.setAttribute(e,!0,n)})),o.forEach((function(e){t.removeAttribute(e,n)}))},m=c[Symbol.iterator]();!(f=(p=m.next()).done);f=!0)v()}catch(g){d=!0,h=g}finally{try{f||null==m.return||m.return()}finally{if(d)throw h}}}}))}},{key:"_getDecoratorStateFromModel",value:function(e){return this.editor.model.document.selection.getAttribute(e)||!1}}]),t}(Al),wc=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this.editor.model.document.selection.hasAttribute("linkHref")}},{key:"execute",value:function(){var e=this.editor,t=this.editor.model,n=t.document.selection,r=e.commands.get("link");t.change((function(e){var i=n.isCollapsed?[yc(n.getFirstPosition(),n.getAttribute("linkHref"),t)]:n.getRanges(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;if(e.removeAttribute("linkHref",c),r){var f=!0,d=!1,h=void 0;try{for(var p,v=r.manualDecorators[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;e.removeAttribute(m.id,c)}}catch(g){d=!0,h=g}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}}}catch(g){a=!0,s=g}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al),_c=function(e,t,n){var r=e.length;return n=void 0===n?r:n,!t&&n>=r?e:function(e,t,n){var r=-1,i=e.length;t<0&&(t=-t>i?0:i+t),(n=n>i?i:n)<0&&(n+=i),i=t>n?0:n-t>>>0,t>>>=0;for(var o=Array(i);++r<i;)o[r]=e[r+t];return o}(e,t,n)},xc=RegExp("[\\u200d\\ud800-\\udfff\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff\\ufe0e\\ufe0f]"),Tc=function(e){return xc.test(e)},Cc="[\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff]",Sc="\\ud83c[\\udffb-\\udfff]",Ec="[^\\ud800-\\udfff]",Ac="(?:\\ud83c[\\udde6-\\uddff]){2}",Pc="[\\ud800-\\udbff][\\udc00-\\udfff]",Mc="(?:"+Cc+"|"+Sc+")?",Nc="[\\ufe0e\\ufe0f]?"+Mc+"(?:\\u200d(?:"+[Ec,Ac,Pc].join("|")+")[\\ufe0e\\ufe0f]?"+Mc+")*",Oc="(?:"+[Ec+Cc+"?",Cc,Ac,Pc,"[\\ud800-\\udfff]"].join("|")+")",Ic=RegExp(Sc+"(?="+Sc+")|"+Oc+Nc,"g"),Dc=function(e){return Tc(e)?function(e){return e.match(Ic)||[]}(e):function(e){return e.split("")}(e)},Rc=b?b.prototype:void 0,Lc=Rc?Rc.toString:void 0,jc=function e(t){if("string"==typeof t)return t;if(xe(t))return function(e,t){for(var n=-1,r=null==e?0:e.length,i=Array(r);++n<r;)i[n]=t(e[n],n,e);return i}(t,e)+"";if(vi(t))return Lc?Lc.call(t):"";var n=t+"";return"0"==n&&1/t==-1/0?"-0":n},Fc=function(e){e=function(e){return null==e?"":jc(e)}(e);var t=Tc(e)?Dc(e):void 0,n=t?t[0]:e.charAt(0),r=t?_c(t,1).join(""):e.slice(1);return n.toUpperCase()+r},zc=/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205f\u3000]/g,Vc=/^(?:(?:https?|ftps?|mailto):|[^a-z]|[a-z+.-]+(?:[^a-z+.:-]|$))/i;function Bc(e,t){var n=t.createAttributeElement("a",{href:e},{priority:5});return t.setCustomProperty("link",!0,n),n}function Uc(e){return function(e){return e.replace(zc,"").match(Vc)}(e=String(e))?e:"#"}var Hc=function(){function e(){f(this,e),this._definitions=new Set}return d(e,[{key:"add",value:function(e){var t=this;Array.isArray(e)?e.forEach((function(e){return t._definitions.add(e)})):this._definitions.add(e)}},{key:"getDispatcher",value:function(){var e=this;return function(t){t.on("attribute:linkHref",(function(t,n,r){if(r.consumable.test(n.item,"attribute:linkHref")){var i=r.writer,o=i.document.selection,a=!0,s=!1,l=void 0;try{for(var u,c=e._definitions[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value,d=i.createAttributeElement("a",f.attributes,{priority:5});i.setCustomProperty("link",!0,d),f.callback(n.attributeNewValue)?n.item.is("selection")?i.wrap(o.getFirstRange(),d):i.wrap(r.mapper.toViewRange(n.range),d):i.unwrap(r.mapper.toViewRange(n.range),d)}}catch(h){s=!0,l=h}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}}),{priority:"high"})}}},{key:"length",get:function(){return this._definitions.size}}]),e}(),qc=function e(t){var n=t.id,r=t.label,i=t.attributes;f(this,e),this.id=n,this.set("value"),this.label=r,this.attributes=i};Yt(qc,wn);var Wc=function(){function e(t,n,r){var i=this;f(this,e),this.model=t,this.attribute=r,this._modelSelection=t.document.selection,this._overrideUid=null,this._isNextGravityRestorationSkipped=!1,n.listenTo(this._modelSelection,"change:range",(function(e,t){i._isNextGravityRestorationSkipped?i._isNextGravityRestorationSkipped=!1:i._isGravityOverridden&&(!t.directChange&&Yc(i._modelSelection.getFirstPosition(),r)||i._restoreGravity())}))}return d(e,[{key:"handleForwardMovement",value:function(e,t){var n=this.attribute;if(!(this._isGravityOverridden||e.isAtStart&&this._hasSelectionAttribute))return Qc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._removeSelectionAttribute(),!0):$c(e,n)?(this._preventCaretMovement(t),this._overrideGravity(),!0):Gc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._overrideGravity(),!0):void 0}},{key:"handleBackwardMovement",value:function(e,t){var n=this.attribute;return this._isGravityOverridden?Qc(e,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(t),this._restoreGravity(),this._removeSelectionAttribute(),!0):(this._preventCaretMovement(t),this._restoreGravity(),e.isAtStart&&this._removeSelectionAttribute(),!0):Qc(e,n)&&!this._hasSelectionAttribute?(this._preventCaretMovement(t),this._setSelectionAttributeFromTheNodeBefore(e),!0):e.isAtEnd&&Gc(e,n)?this._hasSelectionAttribute?void(Kc(e,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity())):(this._preventCaretMovement(t),this._setSelectionAttributeFromTheNodeBefore(e),!0):e.isAtStart?this._hasSelectionAttribute?(this._removeSelectionAttribute(),this._preventCaretMovement(t),!0):void 0:void(Kc(e,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity()))}},{key:"_overrideGravity",value:function(){this._overrideUid=this.model.change((function(e){return e.overrideSelectionGravity()}))}},{key:"_restoreGravity",value:function(){var e=this;this.model.change((function(t){t.restoreSelectionGravity(e._overrideUid),e._overrideUid=null}))}},{key:"_preventCaretMovement",value:function(e){e.preventDefault()}},{key:"_removeSelectionAttribute",value:function(){var e=this;this.model.change((function(t){t.removeSelectionAttribute(e.attribute)}))}},{key:"_setSelectionAttributeFromTheNodeBefore",value:function(e){var t=this,n=this.attribute;this.model.change((function(r){r.setSelectionAttribute(t.attribute,e.nodeBefore.getAttribute(n))}))}},{key:"_skipNextAutomaticGravityRestoration",value:function(){this._isNextGravityRestorationSkipped=!0}},{key:"_isGravityOverridden",get:function(){return!!this._overrideUid}},{key:"_hasSelectionAttribute",get:function(){return this._modelSelection.hasAttribute(this.attribute)}}]),e}();function Yc(e,t){return $c(e,t)||Gc(e,t)}function $c(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t);return!!r&&r.hasAttribute(t)&&(!i||n.getAttribute(t)!==r.getAttribute(t))}function Gc(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t),o=!!r&&r.hasAttribute(t);return i&&(!o||n.getAttribute(t)!==r.getAttribute(t))}function Qc(e,t){var n=e.nodeBefore,r=e.nodeAfter,i=!!n&&n.hasAttribute(t);if(r&&r.hasAttribute(t)&&i)return r.getAttribute(t)!==n.getAttribute(t)}function Kc(e,t){return Yc(e.getShiftedBy(-1),t)}n(45);var Jc="ck-link_selected",Xc="automatic",Zc=/^(https?:)?\/\//,ef=function(e){function t(e){var n;return f(this,t),n=h(this,p(t).call(this,e)),e.config.define("link",{addTargetToExternalLinks:!1}),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"LinkEditing"}}]),d(t,[{key:"init",value:function(){var e=this.editor,t=e.locale;e.model.schema.extend("$text",{allowAttributes:"linkHref"}),e.conversion.for("dataDowncast").attributeToElement({model:"linkHref",view:Bc}),e.conversion.for("editingDowncast").attributeToElement({model:"linkHref",view:function(e,t){return Bc(Uc(e),t)}}),e.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:{href:!0}},model:{key:"linkHref",value:function(e){return e.getAttribute("href")}}}),e.commands.add("link",new kc(e)),e.commands.add("unlink",new wc(e));var n=function(e,t){var n={"Open in a new tab":e("az"),Downloadable:e("ba")};return t.forEach((function(e){return e.label&&n[e.label]&&(e.label=n[e.label]),e})),t}(e.t,function(e){var t=[];if(e)for(var n=0,r=Object.entries(e);n<r.length;n++){var i=r[n],o=c(i,2),a=o[0],s=o[1],l=Object.assign({},s,{id:"link".concat(Fc(a))});t.push(l)}return t}(e.config.get("link.decorators")));this._enableAutomaticDecorators(n.filter((function(e){return e.mode===Xc}))),this._enableManualDecorators(n.filter((function(e){return"manual"===e.mode}))),function(e){var t=e.view,n=e.model,r=e.emitter,i=e.locale,o=new Wc(n,r,e.attribute),a=n.document.selection;r.listenTo(t.document,"keydown",(function(e,t){if(a.isCollapsed&&!(t.shiftKey||t.altKey||t.ctrlKey)){var n=t.keyCode==Kn.arrowright,r=t.keyCode==Kn.arrowleft;if(n||r){var s=a.getFirstPosition(),l=i.contentLanguageDirection;("ltr"===l&&n||"rtl"===l&&r?o.handleForwardMovement(s,t):o.handleBackwardMovement(s,t))&&e.stop()}}}),{priority:Lt.get("high")+1})}({view:e.editing.view,model:e.model,emitter:this,attribute:"linkHref",locale:t}),this._setupLinkHighlight()}},{key:"_enableAutomaticDecorators",value:function(e){var t=this.editor,n=new Hc;t.config.get("link.addTargetToExternalLinks")&&n.add({id:"linkIsExternal",mode:Xc,callback:function(e){return Zc.test(e)},attributes:{target:"_blank",rel:"noopener noreferrer"}}),n.add(e),n.length&&t.conversion.for("downcast").add(n.getDispatcher())}},{key:"_enableManualDecorators",value:function(e){if(e.length){var t=this.editor,n=t.commands.get("link").manualDecorators;e.forEach((function(e){t.model.schema.extend("$text",{allowAttributes:e.id}),n.add(new qc(e)),t.conversion.for("downcast").attributeToElement({model:e.id,view:function(t,r){if(t){var i=n.get(e.id).attributes,o=r.createAttributeElement("a",i,{priority:5});return r.setCustomProperty("link",!0,o),o}}}),t.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:n.get(e.id).attributes},model:{key:e.id}})}))}}},{key:"_setupLinkHighlight",value:function(){var e=this.editor,t=e.editing.view,n=new Set;t.document.registerPostFixer((function(t){var r=e.model.document.selection,i=!1;if(r.hasAttribute("linkHref")){var o=yc(r.getFirstPosition(),r.getAttribute("linkHref"),e.model),a=e.editing.mapper.toViewRange(o),s=!0,l=!1,u=void 0;try{for(var c,f=a.getItems()[Symbol.iterator]();!(s=(c=f.next()).done);s=!0){var d=c.value;d.is("a")&&!d.hasClass(Jc)&&(t.addClass(Jc,d),n.add(d),i=!0)}}catch(h){l=!0,u=h}finally{try{s||null==f.return||f.return()}finally{if(l)throw u}}}return i})),e.conversion.for("editingDowncast").add((function(e){function r(){t.change((function(e){var t=!0,r=!1,i=void 0;try{for(var o,a=n.values()[Symbol.iterator]();!(t=(o=a.next()).done);t=!0){var s=o.value;e.removeClass(Jc,s),n.delete(s)}}catch(l){r=!0,i=l}finally{try{t||null==a.return||a.return()}finally{if(r)throw i}}}))}e.on("insert",r,{priority:"highest"}),e.on("remove",r,{priority:"highest"}),e.on("attribute",r,{priority:"highest"}),e.on("selection",r,{priority:"highest"})}))}}]),t}(xl),tf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this.on("show:warning",(function(e,t){window.alert(t.message)}),{priority:"lowest"})}},{key:"showSuccess",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"success",namespace:t.namespace,title:t.title})}},{key:"showInfo",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"info",namespace:t.namespace,title:t.title})}},{key:"showWarning",value:function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{};this._showNotification({message:e,type:"warning",namespace:t.namespace,title:t.title})}},{key:"_showNotification",value:function(e){var t="show:".concat(e.type)+(e.namespace?":".concat(e.namespace):"");this.fire(t,{message:e.message,type:e.type,title:e.title||""})}}],[{key:"pluginName",get:function(){return"Notification"}}]),t}(xl),nf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).stopListening(n.editor.model.document,"change"),n.listenTo(n.editor.model.document,"change",(function(){return n.refresh()}),{priority:"low"}),n}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.commands.get("imageInsert"),t=this.editor.commands.get("link");this.isEnabled=e.isEnabled||t.isEnabled}},{key:"execute",value:function(){var e=this.editor,t=this.editor.config.get("ckfinder.openerMethod")||"modal";if("popup"!=t&&"modal"!=t)throw new It.b('ckfinder-unknown-openerMethod: The openerMethod config option must by "popup" or "modal".',e);var n=this.editor.config.get("ckfinder.options")||{};n.chooseFiles=!0;var r=n.onInit;n.language||(n.language=e.locale.uiLanguage),n.onInit=function(t){r&&r(t),t.on("files:choose",(function(n){var r=n.data.files.toArray(),i=r.filter((function(e){return!e.isImage()})),o=r.filter((function(e){return e.isImage()})),a=!0,s=!1,l=void 0;try{for(var u,c=i[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;e.execute("link",f.getUrl())}}catch(k){s=!0,l=k}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}var d=[],h=!0,p=!1,v=void 0;try{for(var m,g=o[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=y.getUrl();d.push(b||t.request("file:getProxyUrl",{file:y}))}}catch(k){p=!0,v=k}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}d.length&&rf(e,d)})),t.on("file:choose:resizedImage",(function(t){var n=t.data.resizedUrl;if(n)rf(e,[n]);else{var r=e.plugins.get("Notification"),i=e.locale.t;r.showWarning(i("at"),{title:i("au"),namespace:"ckfinder"})}}))},window.CKFinder[t](n)}}]),t}(Al);function rf(e,t){if(e.commands.get("imageInsert").isEnabled)e.execute("imageInsert",{source:t});else{var n=e.plugins.get("Notification"),r=e.locale.t;n.showWarning(r("av"),{title:r("aw"),namespace:"ckfinder"})}}var of=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.commands.add("ckfinder",new nf(e))}}],[{key:"pluginName",get:function(){return"CKFinderEditing"}},{key:"requires",get:function(){return[tf,mc,ef]}}]),t}(xl),af=/^data:(\S*?);base64,/,sf=function(){function e(t,n,r){if(f(this,e),!t)throw new It.b("fileuploader-missing-file: File must be provided as the first argument",null);if(!n)throw new It.b("fileuploader-missing-token: Token must be provided as the second argument.",null);if(!r)throw new It.b("fileuploader-missing-api-address: Api address must be provided as the third argument.",null);this.file=function(e){if("string"!=typeof e)return!1;var t=e.match(af);return!(!t||!t.length)}(t)?function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:512;try{for(var n=e.match(af)[1],r=atob(e.replace(af,"")),i=[],o=0;o<r.length;o+=t){for(var a=r.slice(o,o+t),s=new Array(a.length),l=0;l<a.length;l++)s[l]=a.charCodeAt(l);i.push(new Uint8Array(s))}return new Blob(i,{type:n})}catch(e){throw new It.b("fileuploader-decoding-image-data-error: Problem with decoding Base64 image data.",null)}}(t):t,this._token=n,this._apiAddress=r}return d(e,[{key:"onProgress",value:function(e){return this.on("progress",(function(t,n){return e(n)})),this}},{key:"onError",value:function(e){return this.once("error",(function(t,n){return e(n)})),this}},{key:"abort",value:function(){this.xhr.abort()}},{key:"send",value:function(){return this._prepareRequest(),this._attachXHRListeners(),this._sendRequest()}},{key:"_prepareRequest",value:function(){var e=new XMLHttpRequest;e.open("POST",this._apiAddress),e.setRequestHeader("Authorization",this._token.value),e.responseType="json",this.xhr=e}},{key:"_attachXHRListeners",value:function(){var e=this,t=this,n=this.xhr;function r(e){return function(){return t.fire("error",e)}}n.addEventListener("error",r("Network Error")),n.addEventListener("abort",r("Abort")),n.upload&&n.upload.addEventListener("progress",(function(t){t.lengthComputable&&e.fire("progress",{total:t.total,uploaded:t.loaded})})),n.addEventListener("load",(function(){var t=n.status,r=n.response;if(t<200||t>299)return e.fire("error",r.message||r.error)}))}},{key:"_sendRequest",value:function(){var e=this,t=new FormData,n=this.xhr;return t.append("file",this.file),new Promise((function(r,i){n.addEventListener("load",(function(){var t=n.status,o=n.response;return t<200||t>299?o.message?i(new It.b("fileuploader-uploading-data-failed: Uploading file failed.",e,{message:o.message})):i(o.error):r(o)})),n.addEventListener("error",(function(){return i(new Error("Network Error"))})),n.addEventListener("abort",(function(){return i(new Error("Abort"))})),n.send(t)}))}}]),e}();Yt(sf,zt);var lf={refreshInterval:36e5,autoRefresh:!0},uf=function(){function e(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:lf;if(f(this,e),!t)throw new It.b("token-missing-token-url: A `tokenUrl` must be provided as the first constructor argument.",this);this.set("value",n.initValue),this._refresh="function"==typeof t?t:function(){return function(e){return new Promise((function(t,n){var r=new XMLHttpRequest;r.open("GET",e),r.addEventListener("load",(function(){var e=r.status,i=r.response;return e<200||e>299?n(new It.b("token-cannot-download-new-token: Cannot download new token from the provided url.",null)):t(i)})),r.addEventListener("error",(function(){return n(new Error("Network Error"))})),r.addEventListener("abort",(function(){return n(new Error("Abort"))})),r.send()}))}(t)},this._options=Object.assign({},lf,n)}return d(e,[{key:"init",value:function(){var e=this;return new Promise((function(t,n){e._options.autoRefresh&&e._startRefreshing(),e.value?t(e):e._refreshToken().then(t).catch(n)}))}},{key:"_refreshToken",value:function(){var e=this;return this._refresh().then((function(t){return e.set("value",t)})).then((function(){return e}))}},{key:"destroy",value:function(){this._stopRefreshing()}},{key:"_startRefreshing",value:function(){var e=this;this._refreshInterval=setInterval((function(){return e._refreshToken()}),this._options.refreshInterval)}},{key:"_stopRefreshing",value:function(){clearInterval(this._refreshInterval)}}],[{key:"create",value:function(t){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:lf;return new e(t,n).init()}}]),e}();Yt(uf,wn);var cf=uf,ff=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor.config.get("cloudServices")||{};for(var n in e)this[n]=e[n];if(this.tokenUrl)return this.token=new t.Token(this.tokenUrl),this.token.init();this.token=null}}],[{key:"pluginName",get:function(){return"CloudServices"}}]),t}(xl);ff.Token=cf;var df=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,n=this.editor,r=n.plugins.get(ff),i=r.token,o=r.uploadUrl;i&&(this._uploadGateway=new t._UploadGateway(i,o),n.plugins.get(_u).createUploadAdapter=function(t){return new hf(e._uploadGateway,t)})}}],[{key:"requires",get:function(){return[_u,ff]}}]),t}(xl),hf=function(){function e(t,n){f(this,e),this.uploadGateway=t,this.loader=n}return d(e,[{key:"upload",value:function(){var e=this;return this.loader.file.then((function(t){return e.fileUploader=e.uploadGateway.upload(t),e.fileUploader.on("progress",(function(t,n){e.loader.uploadTotal=n.total,e.loader.uploaded=n.uploaded})),e.fileUploader.send()}))}},{key:"abort",value:function(){this.fileUploader.abort()}}]),e}();df._UploadGateway=function(){function e(t,n){if(f(this,e),!t)throw new It.b("uploadgateway-missing-token: Token must be provided.",null);if(!n)throw new It.b("uploadgateway-missing-api-address: Api address must be provided.",null);this._token=t,this._apiAddress=n}return d(e,[{key:"upload",value:function(e){return new sf(e,this._token,this._apiAddress)}}]),e}();var pf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).domEventType="mousedown",n}return v(t,e),d(t,[{key:"onDomEvent",value:function(e){this.fire(e.type,e)}}]),t}(di);n(47);var vf=Xn("Ctrl+A"),mf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor.editing.view,n=t.document;this._previouslySelected=new Set,this.editor.editing.downcastDispatcher.on("selection",(function(t,n,r){e._clearPreviouslySelectedWidgets(r.writer);var i=r.writer,o=i.document.selection,a=o.getSelectedElement(),s=null,l=!0,u=!1,c=void 0;try{for(var f,d=o.getRanges()[Symbol.iterator]();!(l=(f=d.next()).done);l=!0){var h=f.value,p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var b=g.value.item;oc(b)&&!gf(b,s)&&(i.addClass(ic,b),e._previouslySelected.add(b),s=b,b==a&&i.setSelection(o.getRanges(),{fake:!0,label:sc(a)}))}}catch(k){v=!0,m=k}finally{try{p||null==y.return||y.return()}finally{if(v)throw m}}}}catch(k){u=!0,c=k}finally{try{l||null==d.return||d.return()}finally{if(u)throw c}}}),{priority:"low"}),t.addObserver(pf),this.listenTo(n,"mousedown",(function(){return e._onMousedown.apply(e,arguments)})),this.listenTo(n,"keydown",(function(){return e._onKeydown.apply(e,arguments)}),{priority:"high"}),this.listenTo(n,"delete",(function(t,n){e._handleDelete("forward"==n.direction)&&(n.preventDefault(),t.stop())}),{priority:"high"})}},{key:"_onMousedown",value:function(e,t){var n=this.editor,r=n.editing.view,i=r.document,o=t.target;if(function(e){for(;e;){if(e.is("editableElement")&&!e.is("rootElement"))return!0;if(oc(e))return!1;e=e.parent}return!1}(o)){if($n.isSafari&&t.domEvent.detail>=3){var a=n.editing.mapper.toModelElement(o);this.editor.model.change((function(e){t.preventDefault(),e.setSelection(a,"in")}))}}else if(oc(o)||(o=o.findAncestor(oc))){t.preventDefault(),i.isFocused||r.focus();var s=n.editing.mapper.toModelElement(o);this._setSelectionOverElement(s)}}},{key:"_onKeydown",value:function(e,t){var n=t.keyCode,r="ltr"===this.editor.locale.contentLanguageDirection,i=n==Kn.arrowdown||n==Kn[r?"arrowright":"arrowleft"],o=!1;!function(e){return e==Kn.arrowright||e==Kn.arrowleft||e==Kn.arrowup||e==Kn.arrowdown}(n)?function(e){return Jn(e)==vf}(t)?o=this._selectAllNestedEditableContent()||this._selectAllContent():n===Kn.enter&&(o=this._handleEnterKey(t.shiftKey)):o=this._handleArrowKeys(i),o&&(t.preventDefault(),e.stop())}},{key:"_handleDelete",value:function(e){var t=this;if(!this.editor.isReadOnly){var n=this.editor.model.document.selection;if(n.isCollapsed){var r=this._getObjectElementNextToSelection(e);return r?(this.editor.model.change((function(e){for(var i=n.anchor.parent;i.isEmpty;){var o=i;i=o.parent,e.remove(o)}t._setSelectionOverElement(r)})),!0):void 0}}}},{key:"_handleArrowKeys",value:function(e){var t=this.editor.model,n=t.schema,r=t.document.selection,i=r.getSelectedElement();if(i&&n.isObject(i)){var o=e?r.getLastPosition():r.getFirstPosition(),a=n.getNearestSelectionRange(o,e?"forward":"backward");return a&&t.change((function(e){e.setSelection(a)})),!0}if(r.isCollapsed){var s=this._getObjectElementNextToSelection(e);return s&&n.isObject(s)?(this._setSelectionOverElement(s),!0):void 0}}},{key:"_handleEnterKey",value:function(e){var t,n,r=this.editor.model,i=r.document.selection.getSelectedElement();if(t=i,n=r.schema,t&&n.isObject(t)&&!n.isInline(t))return r.change((function(t){var n=t.createPositionAt(i,e?"before":"after"),o=t.createElement("paragraph");if(r.schema.isBlock(i.parent)){var a=r.schema.findAllowedParent(n,o);n=t.split(n,a).position}t.insert(o,n),t.setSelection(o,"in")})),!0}},{key:"_selectAllNestedEditableContent",value:function(){var e=this.editor.model,t=e.document.selection,n=e.schema.getLimitElement(t);return t.getFirstRange().root!=n&&(e.change((function(e){e.setSelection(e.createRangeIn(n))})),!0)}},{key:"_selectAllContent",value:function(){var e=this.editor.model,t=this.editor.editing,n=t.view.document.selection.getSelectedElement();if(n&&oc(n)){var r=t.mapper.toModelElement(n.parent);return e.change((function(e){e.setSelection(e.createRangeIn(r))})),!0}return!1}},{key:"_setSelectionOverElement",value:function(e){this.editor.model.change((function(t){t.setSelection(t.createRangeOn(e))}))}},{key:"_getObjectElementNextToSelection",value:function(e){var t=this.editor.model,n=t.schema,r=t.document.selection,i=t.createSelection(r);t.modifySelection(i,{direction:e?"forward":"backward"});var o=e?i.focus.nodeBefore:i.focus.nodeAfter;return o&&n.isObject(o)?o:null}},{key:"_clearPreviouslySelectedWidgets",value:function(e){var t=!0,n=!1,r=void 0;try{for(var i,o=this._previouslySelected[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;e.removeClass(ic,a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}this._previouslySelected.clear()}}],[{key:"pluginName",get:function(){return"Widget"}}]),t}(xl);function gf(e,t){return!!t&&Array.from(e.getAncestors()).includes(t)}var yf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.model.document.selection.getSelectedElement();this.isEnabled=dc(e),dc(e)&&e.hasAttribute("alt")?this.value=e.getAttribute("alt"):this.value=!1}},{key:"execute",value:function(e){var t=this.editor.model,n=t.document.selection.getSelectedElement();t.change((function(t){t.setAttribute("alt",e.newValue,n)}))}}]),t}(Al),bf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this.editor.commands.add("imageTextAlternative",new yf(this.editor))}}],[{key:"pluginName",get:function(){return"ImageTextAlternativeEditing"}}]),t}(xl);n(49);var kf=function(e){function t(e,n){var r;f(this,t),r=h(this,p(t).call(this,e));var i="ck-input-".concat(Rt()),a="ck-status-".concat(Rt());r.set("label"),r.set("value"),r.set("isReadOnly",!1),r.set("errorText",null),r.set("infoText",null),r.labelView=r._createLabelView(i),r.inputView=r._createInputView(n,i,a),r.statusView=r._createStatusView(a),r.bind("_statusText").to(o(r),"errorText",o(r),"infoText",(function(e,t){return e||t}));var s=r.bindTemplate;return r.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input",s.if("isReadOnly","ck-disabled")]},children:[r.labelView,r.inputView,r.statusView]}),r}return v(t,e),d(t,[{key:"_createLabelView",value:function(e){var t=new Ws(this.locale);return t.for=e,t.bind("text").to(this,"label"),t}},{key:"_createInputView",value:function(e,t,n){var r=this,i=new e(this.locale,n);return i.id=t,i.ariaDescribedById=n,i.bind("value").to(this),i.bind("isReadOnly").to(this),i.bind("hasError").to(this,"errorText",(function(e){return!!e})),i.on("input",(function(){r.errorText=null})),i}},{key:"_createStatusView",value:function(e){var t=new Hs(this.locale),n=this.bindTemplate;return t.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input__status",n.if("errorText","ck-labeled-input__status_error"),n.if("_statusText","ck-hidden",(function(e){return!e}))],id:e,role:n.if("errorText","alert")},children:[{text:n.to("_statusText")}]}),t}},{key:"select",value:function(){this.inputView.select()}},{key:"focus",value:function(){this.inputView.focus()}}]),t}(Hs);n(51);var wf=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("value"),n.set("id"),n.set("placeholder"),n.set("isReadOnly",!1),n.set("hasError",!1),n.set("ariaDescribedById");var r=n.bindTemplate;return n.setTemplate({tag:"input",attributes:{type:"text",class:["ck","ck-input","ck-input-text",r.if("hasError","ck-error")],id:r.to("id"),placeholder:r.to("placeholder"),readonly:r.to("isReadOnly"),"aria-invalid":r.if("hasError",!0),"aria-describedby":r.to("ariaDescribedById")},on:{input:r.to("input")}}),n}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this);var n=function(t){e.element.value=t||0===t?t:""};n(this.value),this.on("change:value",(function(e,t,r){n(r)}))}},{key:"select",value:function(){this.element.select()}},{key:"focus",value:function(){this.element.focus()}}]),t}(Hs);function _f(e){var t=e.view;t.listenTo(t.element,"submit",(function(e,n){n.preventDefault(),t.fire("submit")}),{useCapture:!0})}var xf='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M6.972 16.615a.997.997 0 0 1-.744-.292l-4.596-4.596a1 1 0 1 1 1.414-1.414l3.926 3.926 9.937-9.937a1 1 0 0 1 1.414 1.415L7.717 16.323a.997.997 0 0 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tab",focusNext:"tab"}}),n.setTemplate({tag:"form",attributes:{class:["ck","ck-text-alternative-form"],tabindex:"-1"},children:[n.labeledInput,n.saveButtonView,n.cancelButtonView]}),n}return v(t,e),d(t,[{key:"render",value:function(){var e=this;l(p(t.prototype),"render",this).call(this),this.keystrokes.listenTo(this.element),_f({view:this}),[this.labeledInput,this.saveButtonView,this.cancelButtonView].forEach((function(t){e._focusables.add(t),e.focusTracker.add(t.element)}))}},{key:"_createButton",value:function(e,t,n,r){var i=new ll(this.locale);return i.set({label:e,icon:t,tooltip:!0}),i.extendTemplate({attributes:{class:n}}),r&&i.delegate("execute").to(this,r),i}},{key:"_createLabeledInputView",value:function(){var e=this.locale.t,t=new kf(this.locale,wf);return t.label=e("cd"),t.inputView.placeholder=e("cd"),t}}]),t}(Hs);n(55);var Sf=Gs("px"),Ef=Dr.document.body,Af=function(e){function t(e){var n;f(this,t);var r=(n=h(this,p(t).call(this,e))).bindTemplate;return n.set("top",0),n.set("left",0),n.set("position","arrow_nw"),n.set("isVisible",!1),n.set("withArrow",!0),n.set("class"),n.content=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-panel",r.to("position",(function(e){return"ck-balloon-panel_".concat(e)})),r.if("isVisible","ck-balloon-panel_visible"),r.if("withArrow","ck-balloon-panel_with-arrow"),r.to("class")],style:{top:r.to("top",Sf),left:r.to("left",Sf)}},children:n.content}),n}return v(t,e),d(t,[{key:"show",value:function(){this.isVisible=!0}},{key:"hide",value:function(){this.isVisible=!1}},{key:"attachTo",value:function(e){this.show();var n=t.defaultPositions,r=Object.assign({},{element:this.element,positions:[n.southArrowNorth,n.southArrowNorthWest,n.southArrowNorthEast,n.northArrowSouth,n.northArrowSouthWest,n.northArrowSouthEast],limiter:Ef,fitInViewport:!0},e),i=t._getOptimalPosition(r),o=parseInt(i.left),a=parseInt(i.top),s=i.name;Object.assign(this,{top:a,left:o,position:s})}},{key:"pin",value:function(e){var t=this;this.unpin(),this._pinWhenIsVisibleCallback=function(){t.isVisible?t._startPinning(e):t._stopPinning()},this._startPinning(e),this.listenTo(this,"change:isVisible",this._pinWhenIsVisibleCallback)}},{key:"unpin",value:function(){this._pinWhenIsVisibleCallback&&(this._stopPinning(),this.stopListening(this,"change:isVisible",this._pinWhenIsVisibleCallback),this._pinWhenIsVisibleCallback=null,this.hide())}},{key:"_startPinning",value:function(e){var t=this;this.attachTo(e);var n=Pf(e.target),r=e.limiter?Pf(e.limiter):Ef;this.listenTo(Dr.document,"scroll",(function(i,o){var 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Of='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.463 5.187a.888.888 0 1 1 1.254 1.255L9.16 10l3.557 3.557a.888.888 0 1 1-1.254 1.255L7.26 10.61a.888.888 0 0 1 .16-1.382l4.043-4.042z" /></svg>\n',If='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M8.537 14.813a.888.888 0 1 1-1.254-1.255L10.84 10 7.283 6.442a.888.888 0 1 1 1.254-1.255L12.74 9.39a.888.888 0 0 1-.16 1.382l-4.043 4.042z"/></svg>\n';n(57),n(59);var Df=Gs("px"),Rf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).positionLimiter=function(){var e=n.editor.editing.view,t=e.document.selection.editableElement;return t?e.domConverter.mapViewToDom(t.root):null},n.set("visibleView",null),n.view=new Af(e.locale),e.ui.view.body.add(n.view),e.ui.focusTracker.add(n.view.element),n._viewToStack=new Map,n._idToStack=new Map,n.set("_numberOfStacks",0),n.set("_singleViewMode",!1),n._rotatorView=n._createRotatorView(),n._fakePanelsView=n._createFakePanelsView(),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"ContextualBalloon"}}]),d(t,[{key:"hasView",value:function(e){return Array.from(this._viewToStack.keys()).includes(e)}},{key:"add",value:function(e){if(this.hasView(e.view))throw new It.b("contextualballoon-add-view-exist: Cannot add configuration of the same view twice.",[this,e]);var t=e.stackId||"main";if(!this._idToStack.has(t))return this._idToStack.set(t,new Map([[e.view,e]])),this._viewToStack.set(e.view,this._idToStack.get(t)),this._numberOfStacks=this._idToStack.size,void(this._visibleStack&&!e.singleViewMode||this.showStack(t));var n=this._idToStack.get(t);e.singleViewMode&&this.showStack(t),n.set(e.view,e),this._viewToStack.set(e.view,n),n===this._visibleStack&&this._showView(e)}},{key:"remove",value:function(e){if(!this.hasView(e))throw new It.b("contextualballoon-remove-view-not-exist: Cannot remove the configuration of a non-existent view.",[this,e]);var t=this._viewToStack.get(e);this._singleViewMode&&this.visibleView===e&&(this._singleViewMode=!1),this.visibleView===e&&(1===t.size?this._idToStack.size>1?this._showNextStack():(this.view.hide(),this.visibleView=null,this._rotatorView.hideView()):this._showView(Array.from(t.values())[t.size-2])),1===t.size?(this._idToStack.delete(this._getStackId(t)),this._numberOfStacks=this._idToStack.size):t.delete(e),this._viewToStack.delete(e)}},{key:"updatePosition",value:function(e){e&&(this._visibleStack.get(this.visibleView).position=e),this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition()}},{key:"showStack",value:function(e){this.visibleStack=e;var t=this._idToStack.get(e);if(!t)throw new It.b("contextualballoon-showstack-stack-not-exist: Cannot show a stack that does not exist.",this);this._visibleStack!==t&&this._showView(Array.from(t.values()).pop())}},{key:"_getStackId",value:function(e){return Array.from(this._idToStack.entries()).find((function(t){return t[1]===e}))[0]}},{key:"_showNextStack",value:function(){var e=Array.from(this._idToStack.values()),t=e.indexOf(this._visibleStack)+1;e[t]||(t=0),this.showStack(this._getStackId(e[t]))}},{key:"_showPrevStack",value:function(){var e=Array.from(this._idToStack.values()),t=e.indexOf(this._visibleStack)-1;e[t]||(t=e.length-1),this.showStack(this._getStackId(e[t]))}},{key:"_createRotatorView",value:function(){var e=this,t=new Lf(this.editor.locale),n=this.editor.locale.t;return this.view.content.add(t),t.bind("isNavigationVisible").to(this,"_numberOfStacks",this,"_singleViewMode",(function(e,t){return!t&&e>1})),t.on("change:isNavigationVisible",(function(){return e.updatePosition()}),{priority:"low"}),t.bind("counter").to(this,"visibleView",this,"_numberOfStacks",(function(t,r){if(r<2)return"";var i=Array.from(e._idToStack.values()).indexOf(e._visibleStack)+1;return n("bn",[i,r])})),t.buttonNextView.on("execute",(function(){t.focusTracker.isFocused&&e.editor.editing.view.focus(),e._showNextStack()})),t.buttonPrevView.on("execute",(function(){t.focusTracker.isFocused&&e.editor.editing.view.focus(),e._showPrevStack()})),t}},{key:"_createFakePanelsView",value:function(){var e=new jf(this.editor.locale,this.view);return e.bind("numberOfPanels").to(this,"_numberOfStacks",this,"_singleViewMode",(function(e,t){return!t&&e>=2?Math.min(e-1,2):0})),e.listenTo(this.view,"change:top",(function(){return e.updatePosition()})),e.listenTo(this.view,"change:left",(function(){return e.updatePosition()})),this.editor.ui.view.body.add(e),e}},{key:"_showView",value:function(e){var t=e.view,n=e.balloonClassName,r=void 0===n?"":n,i=e.withArrow,o=void 0===i||i,a=e.singleViewMode,s=void 0!==a&&a;this.view.class=r,this.view.withArrow=o,this._rotatorView.showView(t),this.visibleView=t,this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition(),s&&(this._singleViewMode=!0)}},{key:"_getBalloonPosition",value:function(){var e=Array.from(this._visibleStack.values()).pop().position;return e&&!e.limiter&&(e=Object.assign({},e,{limiter:this.positionLimiter})),e}},{key:"_visibleStack",get:function(){return this._viewToStack.get(this.visibleView)}}]),t}(xl),Lf=function(e){function t(e){var n;f(this,t),n=h(this,p(t).call(this,e));var r=e.t,i=n.bindTemplate;return n.set("isNavigationVisible",!0),n.focusTracker=new vs,n.buttonPrevView=n._createButtonView(r("bo"),Of),n.buttonNextView=n._createButtonView(r("bp"),If),n.content=n.createCollection(),n.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-rotator"],"z-index":"-1"},children:[{tag:"div",attributes:{class:["ck-balloon-rotator__navigation",i.to("isNavigationVisible",(function(e){return e?"":"ck-hidden"}))]},children:[n.buttonPrevView,{tag:"span",attributes:{class:["ck-balloon-rotator__counter"]},children:[{text:i.to("counter")}]},n.buttonNextView]},{tag:"div",attributes:{class:"ck-balloon-rotator__content"},children:n.content}]}),n}return v(t,e),d(t,[{key:"render",value:function(){l(p(t.prototype),"render",this).call(this),this.focusTracker.add(this.element)}},{key:"showView",value:function(e){this.hideView(),this.content.add(e)}},{key:"hideView",value:function(){this.content.clear()}},{key:"_createButtonView",value:function(e,t){var n=new ll(this.locale);return n.set({label:e,icon:t,tooltip:!0}),n}}]),t}(Hs),jf=function(e){function t(e,n){var r;f(this,t);var i=(r=h(this,p(t).call(this,e))).bindTemplate;return r.set("top",0),r.set("left",0),r.set("height",0),r.set("width",0),r.set("numberOfPanels",0),r.content=r.createCollection(),r._balloonPanelView=n,r.setTemplate({tag:"div",attributes:{class:["ck-fake-panel",i.to("numberOfPanels",(function(e){return e?"":"ck-hidden"}))],style:{top:i.to("top",Df),left:i.to("left",Df),width:i.to("width",Df),height:i.to("height",Df)}},children:r.content}),r.on("change:numberOfPanels",(function(e,t,n,i){n>i?r._addPanels(n-i):r._removePanels(i-n),r.updatePosition()})),r}return v(t,e),d(t,[{key:"_addPanels",value:function(e){for(;e--;){var t=new Hs;t.setTemplate({tag:"div"}),this.content.add(t),this.registerChild(t)}}},{key:"_removePanels",value:function(e){for(;e--;){var t=this.content.last;this.content.remove(t),this.deregisterChild(t),t.destroy()}}},{key:"updatePosition",value:function(){if(this.numberOfPanels){var e=this._balloonPanelView,t=e.top,n=e.left,r=new Ii(this._balloonPanelView.element),i=r.width,o=r.height;Object.assign(this,{top:t,left:n,width:i,height:o})}}}]),t}(Hs);function Ff(e){var t=e.editing.view,n=Af.defaultPositions;return{target:t.domConverter.viewToDom(t.document.selection.getSelectedElement()),positions:[n.northArrowSouth,n.northArrowSouthWest,n.northArrowSouthEast,n.southArrowNorth,n.southArrowNorthWest,n.southArrowNorthEast]}}var zf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){this._createButton(),this._createForm()}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this._form.destroy()}},{key:"_createButton",value:function(){var e=this,t=this.editor,n=t.t;t.ui.componentFactory.add("imageTextAlternative",(function(r){var i=t.commands.get("imageTextAlternative"),o=new ll(r);return o.set({label:n("bv"),icon:'<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M5.085 6.22L2.943 4.078a.75.75 0 1 1 1.06-1.06l2.592 2.59A11.094 11.094 0 0 1 10 5.068c4.738 0 8.578 3.101 8.578 5.083 0 1.197-1.401 2.803-3.555 3.887l1.714 1.713a.75.75 0 0 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Cf(t.locale),this._form.render(),this.listenTo(this._form,"submit",(function(){t.execute("imageTextAlternative",{newValue:e._form.labeledInput.inputView.element.value}),e._hideForm(!0)})),this.listenTo(this._form,"cancel",(function(){e._hideForm(!0)})),this._form.keystrokes.set("Esc",(function(t,n){e._hideForm(!0),n()})),this.listenTo(t.ui,"update",(function(){fc(n.selection)?e._isVisible&&function(e){var t=e.plugins.get("ContextualBalloon");if(fc(e.editing.view.document.selection)){var n=Ff(e);t.updatePosition(n)}}(t):e._hideForm(!0)})),pl({emitter:this._form,activator:function(){return e._isVisible},contextElements:[this._balloon.view.element],callback:function(){return e._hideForm()}})}},{key:"_showForm",value:function(){if(!this._isVisible){var e=this.editor,t=e.commands.get("imageTextAlternative"),n=this._form.labeledInput;this._isInBalloon||this._balloon.add({view:this._form,position:Ff(e)}),n.value=n.inputView.element.value=t.value||"",this._form.labeledInput.select()}}},{key:"_hideForm",value:function(e){this._isInBalloon&&(this._form.focusTracker.isFocused&&this._form.saveButtonView.focus(),this._balloon.remove(this._form),e&&this.editor.editing.view.focus())}},{key:"_isVisible",get:function(){return this._balloon.visibleView===this._form}},{key:"_isInBalloon",get:function(){return this._balloon.hasView(this._form)}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"ImageTextAlternativeUI"}}]),t}(xl),Vf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[bf,zf]}},{key:"pluginName",get:function(){return"ImageTextAlternative"}}]),t}(xl);n(61);var Bf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"requires",get:function(){return[mc,mf,Vf]}},{key:"pluginName",get:function(){return"Image"}}]),t}(xl),Uf=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e))).buttonView=new ll(e),n._fileInputView=new Hf(e),n._fileInputView.bind("acceptedType").to(o(n)),n._fileInputView.bind("allowMultipleFiles").to(o(n)),n._fileInputView.delegate("done").to(o(n)),n.setTemplate({tag:"span",attributes:{class:"ck-file-dialog-button"},children:[n.buttonView,n._fileInputView]}),n.buttonView.on("execute",(function(){n._fileInputView.open()})),n}return v(t,e),d(t,[{key:"focus",value:function(){this.buttonView.focus()}}]),t}(Hs),Hf=function(e){function t(e){var n;f(this,t),(n=h(this,p(t).call(this,e))).set("acceptedType"),n.set("allowMultipleFiles",!1);var r=n.bindTemplate;return n.setTemplate({tag:"input",attributes:{class:["ck-hidden"],type:"file",tabindex:"-1",accept:r.to("acceptedType"),multiple:r.to("allowMultipleFiles")},on:{change:r.to((function(){n.element&&n.element.files&&n.element.files.length&&n.fire("done",n.element.files),n.element.value=""}))}}),n}return v(t,e),d(t,[{key:"open",value:function(){this.element.click()}}]),t}(Hs);function qf(e){var t=e.map((function(e){return e.replace("+","\\+")}));return new RegExp("^image\\/(".concat(t.join("|"),")$"))}function Wf(e){return new Promise((function(t,n){var r=e.getAttribute("src");fetch(r).then((function(e){return e.blob()})).then((function(e){var i=function(e,t){return e.type?e.type:t.match(/data:(image\/\w+);base64/)?t.match(/data:(image\/\w+);base64/)[1].toLowerCase():"image/jpeg"}(e,r),o=function(e,t,n){try{return new File([e],t,{type:n})}catch(e){return null}}(e,"image.".concat(i.replace("image/","")),i);o?t(o):n()})).catch(n)}))}var Yf=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.t;e.ui.componentFactory.add("imageUpload",(function(n){var r=new Uf(n),i=e.commands.get("imageUpload"),o=e.config.get("image.upload.types"),a=qf(o);return r.set({acceptedType:o.map((function(e){return"image/".concat(e)})).join(","),allowMultipleFiles:!0}),r.buttonView.set({label:t("j"),icon:'<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M6.91 10.54c.26-.23.64-.21.88.03l3.36 3.14 2.23-2.06a.64.64 0 0 1 .87 0l2.52 2.97V4.5H3.2v10.12l3.71-4.08zm10.27-7.51c.6 0 1.09.47 1.09 1.05v11.84c0 .59-.49 1.06-1.09 1.06H2.79c-.6 0-1.09-.47-1.09-1.06V4.08c0-.58.49-1.05 1.1-1.05h14.38zm-5.22 5.56a1.96 1.96 0 1 1 3.4-1.96 1.96 1.96 0 0 1-3.4 1.96z"/></svg>',tooltip:!0}),r.buttonView.bind("isEnabled").to(i),r.on("done",(function(t,n){var r=Array.from(n).filter((function(e){return a.test(e.type)}));r.length&&e.execute("imageUpload",{file:r})})),r}))}}]),t}(xl),$f='<svg 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this.replace(t,n)?n:null}},{key:"setAttribute",value:function(e,t,n){n._setAttribute(e,t)}},{key:"removeAttribute",value:function(e,t){t._removeAttribute(e)}},{key:"addClass",value:function(e,t){t._addClass(e)}},{key:"removeClass",value:function(e,t){t._removeClass(e)}},{key:"setStyle",value:function(e,t,n){R(e)&&void 0===n&&(n=t),n._setStyle(e,t)}},{key:"removeStyle",value:function(e,t){t._removeStyle(e)}},{key:"setCustomProperty",value:function(e,t,n){n._setCustomProperty(e,t)}},{key:"removeCustomProperty",value:function(e,t){return t._removeCustomProperty(e)}},{key:"createPositionAt",value:function(e,t){return On._createAt(e,t)}},{key:"createPositionAfter",value:function(e){return On._createAfter(e)}},{key:"createPositionBefore",value:function(e){return On._createBefore(e)}},{key:"createRange",value:function(e,t){return new In(e,t)}},{key:"createRangeOn",value:function(e){return In._createOn(e)}},{key:"createRangeIn",value:function(e){return 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v(t,e),d(t,null,[{key:"requires",get:function(){return[_u,tf,El]}},{key:"pluginName",get:function(){return"ImageUploadEditing"}}]),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.model.document,r=t.model.schema,i=t.conversion,o=t.plugins.get(_u),a=qf(t.config.get("image.upload.types"));r.extend("image",{allowAttributes:["uploadId","uploadStatus"]}),t.commands.add("imageUpload",new td(t)),i.for("upcast").attributeToAttribute({view:{name:"img",key:"uploadId"},model:"uploadId"}),this.listenTo(t.editing.view.document,"clipboardInput",(function(e,n){if(!function(e){return Array.from(e.types).includes("text/html")&&""!==e.getData("text/html")}(n.dataTransfer)){var r=Array.from(n.dataTransfer.files).filter((function(e){return!!e&&a.test(e.type)})),i=n.targetRanges.map((function(e){return t.editing.mapper.toModelRange(e)}));t.model.change((function(n){n.setSelection(i),r.length&&(e.stop(),t.model.enqueueChange("default",(function(){t.execute("imageUpload",{file:r})})))}))}})),this.listenTo(t.plugins.get(El),"inputTransformation",(function(e,n){var r=Array.from(t.editing.view.createRangeIn(n.content)).filter((function(e){return function(e){return!(!e.is("element","img")||!e.getAttribute("src"))&&(e.getAttribute("src").match(/^data:image\/\w+;base64,/g)||e.getAttribute("src").match(/^blob:/g))}(e.item)&&!e.item.getAttribute("uploadProcessed")})).map((function(e){return{promise:Wf(e.item),imageElement:e.item}}));if(r.length){var i=new ed,a=!0,s=!1,l=void 0;try{for(var u,c=r[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;i.setAttribute("uploadProcessed",!0,f.imageElement);var d=o.createLoader(f.promise);d&&(i.setAttribute("src","",f.imageElement),i.setAttribute("uploadId",d.id,f.imageElement))}}catch(h){s=!0,l=h}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}})),t.editing.view.document.on("dragover",(function(e,t){t.preventDefault()})),n.on("change",(function(){var r=n.differ.getChanges({includeChangesInGraveyard:!0}),i=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(i=(l=u.next()).done);i=!0){var c=l.value;if("insert"==c.type&&"$text"!=c.name){var f=c.position.nodeAfter,d="$graveyard"==c.position.root.rootName,h=!0,p=!1,v=void 0;try{for(var m,g=id(t,f)[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value,b=y.getAttribute("uploadId");if(b){var k=o.loaders.get(b);k&&(d?k.abort():"idle"==k.status&&e._readAndUpload(k,y))}}}catch(w){p=!0,v=w}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}}}}catch(w){a=!0,s=w}finally{try{i||null==u.return||u.return()}finally{if(a)throw 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n;"error"==e.status&&n&&s.showWarning(n,{title:o("an"),namespace:"upload"}),l(),i.enqueueChange("transparent",(function(e){e.remove(t)}))}));function l(){i.enqueueChange("transparent",(function(e){e.removeAttribute("uploadId",t),e.removeAttribute("uploadStatus",t)})),a.destroyLoader(e)}}},{key:"_parseAndSetSrcsetAttributeOnImage",value:function(e,t,n){var r=0,i=Object.keys(e).filter((function(e){var t=parseInt(e,10);if(!isNaN(t))return r=Math.max(r,t),!0})).map((function(t){return"".concat(e[t]," ").concat(t,"w")})).join(", ");""!=i&&n.setAttribute("srcset",{data:i,width:r},t)}}]),t}(xl);function id(e,t){return Array.from(e.model.createRangeOn(t)).filter((function(e){return e.item.is("image")})).map((function(e){return e.item}))}var od=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"ImageUpload"}},{key:"requires",get:function(){return[rd,Yf,Gf]}}]),t}(xl),ad=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this.editor.model,t=Uu(e.document.selection.getSelectedBlocks());this.value=!!t&&t.is("paragraph"),this.isEnabled=!!t&&sd(t,e.schema)}},{key:"execute",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=this.editor.model,n=t.document;t.change((function(r){var i=(e.selection||n.selection).getSelectedBlocks(),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;!c.is("paragraph")&&sd(c,t.schema)&&r.rename(c,"paragraph")}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al);function sd(e,t){return t.checkChild(e.parent,"paragraph")&&!t.isObject(e)}var ld=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,n=this.editor,r=n.model,i=n.data;n.commands.add("paragraph",new ad(n)),r.schema.register("paragraph",{inheritAllFrom:"$block"}),n.conversion.elementToElement({model:"paragraph",view:"p"}),n.conversion.for("upcast").elementToElement({model:function(e,n){return t.paragraphLikeElements.has(e.name)?e.isEmpty?null:n.createElement("paragraph"):null},converterPriority:"low"}),i.upcastDispatcher.on("element",(function(e,t,n){n.consumable.test(t.viewItem,{name:t.viewItem.name})&&cd(t.viewItem,t.modelCursor,n.schema)&&Object.assign(t,ud(t.viewItem,t.modelCursor,n))}),{priority:"low"}),i.upcastDispatcher.on("text",(function(e,t,n){t.modelRange||cd(t.viewItem,t.modelCursor,n.schema)&&Object.assign(t,ud(t.viewItem,t.modelCursor,n))}),{priority:"lowest"}),r.document.registerPostFixer((function(t){return e._autoparagraphEmptyRoots(t)})),n.data.on("ready",(function(){r.enqueueChange("transparent",(function(t){return e._autoparagraphEmptyRoots(t)}))}),{priority:"lowest"})}},{key:"_autoparagraphEmptyRoots",value:function(e){var t=this.editor.model,n=!0,r=!1,i=void 0;try{for(var o,a=t.document.getRootNames()[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value,l=t.document.getRoot(s);if(l.isEmpty&&"$graveyard"!=l.rootName&&t.schema.checkChild(l,"paragraph"))return e.insertElement("paragraph",l),!0}}catch(u){r=!0,i=u}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}}],[{key:"pluginName",get:function(){return"Paragraph"}}]),t}(xl);function ud(e,t,n){var r=n.writer.createElement("paragraph");return n.writer.insert(r,t),n.convertItem(e,n.writer.createPositionAt(r,0))}function cd(e,t,n){var r=n.createContext(t);return!!n.checkChild(r,"paragraph")&&!!n.checkChild(r.push("paragraph"),e)}ld.paragraphLikeElements=new Set(["blockquote","dd","div","dt","h1","h2","h3","h4","h5","h6","li","p","td"]);var fd=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).modelElements=n,r}return v(t,e),d(t,[{key:"refresh",value:function(){var e=this,t=Uu(this.editor.model.document.selection.getSelectedBlocks());this.value=!!t&&this.modelElements.includes(t.name)&&t.name,this.isEnabled=!!t&&this.modelElements.some((function(n){return dd(t,n,e.editor.model.schema)}))}},{key:"execute",value:function(e){var t=this.editor.model,n=t.document,r=e.value;t.change((function(e){var i=Array.from(n.selection.getSelectedBlocks()).filter((function(e){return dd(e,r,t.schema)})),o=!0,a=!1,s=void 0;try{for(var l,u=i[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;c.is(r)||e.rename(c,r)}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}}]),t}(Al);function dd(e,t,n){return n.checkChild(e.parent,t)&&!n.isObject(e)}var hd="paragraph",pd=function(e){function t(e){var n;return f(this,t),n=h(this,p(t).call(this,e)),e.config.define("heading",{options:[{model:"paragraph",title:"Paragraph",class:"ck-heading_paragraph"},{model:"heading1",view:"h2",title:"Heading 1",class:"ck-heading_heading1"},{model:"heading2",view:"h3",title:"Heading 2",class:"ck-heading_heading2"},{model:"heading3",view:"h4",title:"Heading 3",class:"ck-heading_heading3"}]}),n}return v(t,e),d(t,null,[{key:"pluginName",get:function(){return"HeadingEditing"}}]),d(t,[{key:"init",value:function(){var e=this.editor,t=e.config.get("heading.options"),n=[],r=!0,i=!1,o=void 0;try{for(var a,s=t[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value;l.model!==hd&&(e.model.schema.register(l.model,{inheritAllFrom:"$block"}),e.conversion.elementToElement(l),n.push(l.model))}}catch(u){i=!0,o=u}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}this._addDefaultH1Conversion(e),e.commands.add("heading",new fd(e,n))}},{key:"afterInit",value:function(){var e=this.editor,t=e.commands.get("enter"),n=e.config.get("heading.options");t&&this.listenTo(t,"afterExecute",(function(t,r){var i=e.model.document.selection.getFirstPosition().parent;n.some((function(e){return i.is(e.model)}))&&!i.is(hd)&&0===i.childCount&&r.writer.rename(i,hd)}))}},{key:"_addDefaultH1Conversion",value:function(e){e.conversion.for("upcast").elementToElement({model:"heading1",view:"h1",converterPriority:Lt.get("low")+1})}}],[{key:"requires",get:function(){return[ld]}}]),t}(xl),vd=function e(t,n){f(this,e),n&&mn(this,n),t&&this.set(t)};Yt(vd,wn),n(10);var md=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.t,r=function(e){var t=e.t,n={Paragraph:t("bw"),"Heading 1":t("bx"),"Heading 2":t("by"),"Heading 3":t("bz"),"Heading 4":t("ca"),"Heading 5":t("cb"),"Heading 6":t("cc")};return e.config.get("heading.options").map((function(e){var t=n[e.title];return t&&t!=e.title&&(e.title=t),e}))}(t),i=n("e"),o=n("f");t.ui.componentFactory.add("heading",(function(n){var a={},s=new Fn,l=t.commands.get("heading"),u=t.commands.get("paragraph"),c=[l],f=!0,d=!1,h=void 0;try{for(var p,v=function(){var e=p.value,t={type:"button",model:new vd({label:e.title,class:e.class,withText:!0})};"paragraph"===e.model?(t.model.bind("isOn").to(u,"value"),t.model.set("commandName","paragraph"),c.push(u)):(t.model.bind("isOn").to(l,"value",(function(t){return t===e.model})),t.model.set({commandName:"heading",commandValue:e.model})),s.add(t),a[e.model]=e.title},m=r[Symbol.iterator]();!(f=(p=m.next()).done);f=!0)v()}catch(y){d=!0,h=y}finally{try{f||null==m.return||m.return()}finally{if(d)throw h}}var g=vl(n);return ml(g,s),g.buttonView.set({isOn:!1,withText:!0,tooltip:o}),g.extendTemplate({attributes:{class:["ck-heading-dropdown"]}}),g.bind("isEnabled").toMany(c,"isEnabled",(function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];return t.some((function(e){return e}))})),g.buttonView.bind("label").to(l,"value",u,"value",(function(e,t){var n=e||t&&"paragraph";return a[n]?a[n]:i})),e.listenTo(g,"execute",(function(e){t.execute(e.source.commandName,e.source.commandValue?{value:e.source.commandValue}:void 0),t.editing.view.focus()})),g}))}}]),t}(xl);function gd(e){var t=!0,n=!1,r=void 0;try{for(var i,o=e.getChildren()[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;if(a&&a.is("caption"))return a}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}return null}function yd(e){var t=e.parent;return"figcaption"==e.name&&t&&"figure"==t.name&&t.hasClass("image")?{name:!0}:null}var bd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor,n=t.editing.view,r=t.model.schema,i=t.data,o=t.editing,a=t.t;r.register("caption",{allowIn:"image",allowContentOf:"$block",isLimit:!0}),t.model.document.registerPostFixer((function(t){return e._insertMissingModelCaptionElement(t)})),t.conversion.for("upcast").elementToElement({view:yd,model:"caption"}),i.downcastDispatcher.on("insert:caption",kd((function(e){return e.createContainerElement("figcaption")}),!1));var s=function(e,t){return function(n){var r=n.createEditableElement("figcaption");return n.setCustomProperty("imageCaption",!0,r),ys({view:e,element:r,text:t}),lc(r,n)}}(n,a("am"));o.downcastDispatcher.on("insert:caption",kd(s)),o.downcastDispatcher.on("insert",this._fixCaptionVisibility((function(e){return e.item})),{priority:"high"}),o.downcastDispatcher.on("remove",this._fixCaptionVisibility((function(e){return e.position.parent})),{priority:"high"}),n.document.registerPostFixer((function(t){return e._updateCaptionVisibility(t)}))}},{key:"_updateCaptionVisibility",value:function(e){var t,n=this.editor.editing.mapper,r=this._lastSelectedCaption,i=this.editor.model.document.selection,o=i.getSelectedElement();if(o&&o.is("image")){var a=gd(o);t=n.toViewElement(a)}var s=wd(i.getFirstPosition().parent);if(s&&(t=n.toViewElement(s)),t)return r?r===t?xd(t,e):(_d(r,e),this._lastSelectedCaption=t,xd(t,e)):(this._lastSelectedCaption=t,xd(t,e));if(r){var l=_d(r,e);return this._lastSelectedCaption=null,l}return!1}},{key:"_fixCaptionVisibility",value:function(e){var t=this;return function(n,r,i){var o=wd(e(r)),a=t.editor.editing.mapper,s=i.writer;if(o){var l=a.toViewElement(o);l&&(o.childCount?s.removeClass("ck-hidden",l):s.addClass("ck-hidden",l))}}}},{key:"_insertMissingModelCaptionElement",value:function(e){var t=this.editor.model,n=t.document.differ.getChanges(),r=[],i=!0,o=!1,a=void 0;try{for(var s,l=n[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var u=s.value;if("insert"==u.type&&"$text"!=u.name){var c=u.position.nodeAfter;if(c.is("image")&&!gd(c)&&r.push(c),!c.is("image")&&c.childCount){var f=!0,d=!1,h=void 0;try{for(var p,v=t.createRangeIn(c).getItems()[Symbol.iterator]();!(f=(p=v.next()).done);f=!0){var m=p.value;m.is("image")&&!gd(m)&&r.push(m)}}catch(k){d=!0,h=k}finally{try{f||null==v.return||v.return()}finally{if(d)throw h}}}}}}catch(k){o=!0,a=k}finally{try{i||null==l.return||l.return()}finally{if(o)throw a}}for(var g=0,y=r;g<y.length;g++){var b=y[g];e.appendElement("caption",b)}return!!r.length}}],[{key:"pluginName",get:function(){return"ImageCaptionEditing"}}]),t}(xl);function kd(e){var t=!(arguments.length>1&&void 0!==arguments[1])||arguments[1];return function(n,r,i){var o=r.item;if((o.childCount||t)&&dc(o.parent)){if(!i.consumable.consume(r.item,"insert"))return;var a=i.mapper.toViewElement(r.range.start.parent),s=e(i.writer),l=i.writer;o.childCount||l.addClass("ck-hidden",s),function(e,t,n,r){var i=r.writer.createPositionAt(n,"end");r.writer.insert(i,e),r.mapper.bindElements(t,e)}(s,r.item,a,i)}}}function wd(e){var t=e.getAncestors({includeSelf:!0}).find((function(e){return"caption"==e.name}));return t&&t.parent&&"image"==t.parent.name?t:null}function 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o,a=t[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;if(s.name===e)return s}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}}var Sd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 4.5V3h16v1.5zm2.5 3V12h11V7.5h-11zM4.061 6H15.94c.586 0 1.061.407 1.061.91v5.68c0 .503-.475.91-1.061.91H4.06c-.585 0-1.06-.407-1.06-.91V6.91C3 6.406 3.475 6 4.061 6zM2 16.5V15h16v1.5z"/></svg>',Ed='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg" clip-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="1.414"><path d="M18 4.5V3H2v1.5h16zm0 3V6h-5.674v1.5H18zm0 3V9h-5.674v1.5H18zm0 3V12h-5.674v1.5H18zm-8.5-6V12h-6V7.5h6zm.818-1.5H2.682C2.305 6 2 6.407 2 6.91v5.68c0 .503.305.91.682.91h7.636c.377 0 .682-.407.682-.91V6.91c0-.503-.305-.91-.682-.91zM18 16.5V15H2v1.5h16z"/></svg>',Ad='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 4.5V3h16v1.5zm4.5 3V12h7V7.5h-7zM5.758 6h8.484c.419 0 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0!==arguments[0]?arguments[0]:[]).map(Id)}function Id(e){if("string"==typeof e){var t=e;Md[t]?e=Object.assign({},Md[t]):(console.warn(Object(It.a)("image-style-not-found: There is no such image style of given name."),{name:t}),e={name:t})}else if(Md[e.name]){var n=Md[e.name],r=Object.assign({},e);for(var i in n)e.hasOwnProperty(i)||(r[i]=n[i]);e=r}return"string"==typeof e.icon&&Nd[e.icon]&&(e.icon=Nd[e.icon]),e}var Dd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor,t=e.model.schema,n=e.data,r=e.editing;e.config.define("image.styles",["full","side"]);var i=Od(e.config.get("image.styles"));t.extend("image",{allowAttributes:"imageStyle"});var o=function(e){return function(t,n,r){if(r.consumable.consume(n.item,t.name)){var i=Cd(n.attributeNewValue,e),o=Cd(n.attributeOldValue,e),a=r.mapper.toViewElement(n.item),s=r.writer;o&&s.removeClass(o.className,a),i&&s.addClass(i.className,a)}}}(i);r.downcastDispatcher.on("attribute:imageStyle:image",o),n.downcastDispatcher.on("attribute:imageStyle:image",o),n.upcastDispatcher.on("element:figure",function(e){var t=e.filter((function(e){return!e.isDefault}));return function(e,n,r){if(n.modelRange){var i=n.viewItem,o=Uu(n.modelRange.getItems());if(r.schema.checkAttribute(o,"imageStyle")){var a=!0,s=!1,l=void 0;try{for(var u,c=t[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;r.consumable.consume(i,{classes:f.className})&&r.writer.setAttribute("imageStyle",f.name,o)}}catch(d){s=!0,l=d}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}}}}}(i),{priority:"low"}),e.commands.add("imageStyle",new Td(e,i))}}],[{key:"pluginName",get:function(){return"ImageStyleEditing"}}]),t}(xl);n(72);var Rd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=function(e,t){var n=!0,r=!1,i=void 0;try{for(var o,a=e[Symbol.iterator]();!(n=(o=a.next()).done);n=!0){var s=o.value;t[s.title]&&(s.title=t[s.title])}}catch(l){r=!0,i=l}finally{try{n||null==a.return||a.return()}finally{if(r)throw i}}return e}(Od(this.editor.config.get("image.styles")),this.localizedDefaultStylesTitles),t=!0,n=!1,r=void 0;try{for(var i,o=e[Symbol.iterator]();!(t=(i=o.next()).done);t=!0){var a=i.value;this._createButton(a)}}catch(s){n=!0,r=s}finally{try{t||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"_createButton",value:function(e){var t=this,n=this.editor,r="imageStyle:".concat(e.name);n.ui.componentFactory.add(r,(function(r){var i=n.commands.get("imageStyle"),o=new ll(r);return o.set({label:e.title,icon:e.icon,tooltip:!0,isToggleable:!0}),o.bind("isEnabled").to(i,"isEnabled"),o.bind("isOn").to(i,"value",(function(t){return t===e.name})),t.listenTo(o,"execute",(function(){return n.execute("imageStyle",{value:e.name})})),o}))}},{key:"localizedDefaultStylesTitles",get:function(){var e=this.editor.t;return{"Full size image":e("ah"),"Side image":e("ai"),"Left aligned image":e("aj"),"Centered image":e("ak"),"Right aligned image":e("al")}}}],[{key:"pluginName",get:function(){return"ImageStyleUI"}}]),t}(xl),Ld=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this,t=this.editor;if(t.plugins.has("BalloonToolbar")){var n=t.plugins.get("BalloonToolbar");this.listenTo(n,"show",(function(e){(function(e){var t=e.getSelectedElement();return!(!t||!oc(t))})(t.editing.view.document.selection)&&e.stop()}),{priority:"high"})}this._toolbarDefinitions=new Map,this._balloon=this.editor.plugins.get("ContextualBalloon"),this.listenTo(t.ui,"update",(function(){e._updateToolbarsVisibility()})),this.listenTo(t.ui.focusTracker,"change:isFocused",(function(){e._updateToolbarsVisibility()}),{priority:"low"})}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this);var e=!0,n=!1,r=void 0;try{for(var i,o=this._toolbarDefinitions.values()[Symbol.iterator]();!(e=(i=o.next()).done);e=!0)i.value.view.destroy()}catch(a){n=!0,r=a}finally{try{e||null==o.return||o.return()}finally{if(n)throw r}}}},{key:"register",value:function(e,t){var n=t.ariaLabel,r=t.items,i=t.getRelatedElement,o=t.balloonClassName,a=void 0===o?"ck-toolbar-container":o,s=this.editor,l=s.t,u=new gl(s.locale);if(u.ariaLabel=n||l("ax"),this._toolbarDefinitions.has(e))throw new It.b("widget-toolbar-duplicated: Toolbar with the given id was already added.",this,{toolbarId:e});u.fillFromConfig(r,s.ui.componentFactory),this._toolbarDefinitions.set(e,{view:u,getRelatedElement:i,balloonClassName:a})}},{key:"_updateToolbarsVisibility",value:function(){var e=0,t=null,n=null,r=!0,i=!1,o=void 0;try{for(var a,s=this._toolbarDefinitions.values()[Symbol.iterator]();!(r=(a=s.next()).done);r=!0){var l=a.value,u=l.getRelatedElement(this.editor.editing.view.document.selection);if(this.editor.ui.focusTracker.isFocused)if(u){var c=u.getAncestors().length;c>e&&(e=c,t=u,n=l)}else this._isToolbarInBalloon(l)&&this._hideToolbar(l);else this._isToolbarVisible(l)&&this._hideToolbar(l)}}catch(f){i=!0,o=f}finally{try{r||null==s.return||s.return()}finally{if(i)throw o}}n&&this._showToolbar(n,t)}},{key:"_hideToolbar",value:function(e){this._balloon.remove(e.view),this.stopListening(this._balloon,"change:visibleView")}},{key:"_showToolbar",value:function(e,t){var n=this;this._isToolbarVisible(e)?jd(this.editor,t):this._isToolbarInBalloon(e)||(this._balloon.add({view:e.view,position:Fd(this.editor,t),balloonClassName:e.balloonClassName}),this.listenTo(this._balloon,"change:visibleView",(function(){var e=!0,t=!1,r=void 0;try{for(var i,o=n._toolbarDefinitions.values()[Symbol.iterator]();!(e=(i=o.next()).done);e=!0){var a=i.value;if(n._isToolbarVisible(a)){var s=a.getRelatedElement(n.editor.editing.view.document.selection);jd(n.editor,s)}}}catch(l){t=!0,r=l}finally{try{e||null==o.return||o.return()}finally{if(t)throw r}}})))}},{key:"_isToolbarVisible",value:function(e){return this._balloon.visibleView===e.view}},{key:"_isToolbarInBalloon",value:function(e){return this._balloon.hasView(e.view)}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"WidgetToolbarRepository"}}]),t}(xl);function jd(e,t){var n=e.plugins.get("ContextualBalloon"),r=Fd(e,t);n.updatePosition(r)}function Fd(e,t){var n=e.editing.view,r=Af.defaultPositions;return{target:n.domConverter.mapViewToDom(t),positions:[r.northArrowSouth,r.northArrowSouthWest,r.northArrowSouthEast,r.southArrowNorth,r.southArrowNorthWest,r.southArrowNorthEast]}}var zd=function(e){function t(e){var n;return f(this,t),(n=h(this,p(t).call(this,e)))._childCommands=[],n}return v(t,e),d(t,[{key:"refresh",value:function(){}},{key:"execute",value:function(){for(var e=arguments.length,t=new Array(e),n=0;n<e;n++)t[n]=arguments[n];this._getFirstEnabledCommand().execute(t)}},{key:"registerChildCommand",value:function(e){var t=this;this._childCommands.push(e),e.on("change:isEnabled",(function(){return t._checkEnabled()})),this._checkEnabled()}},{key:"_checkEnabled",value:function(){this.isEnabled=!!this._getFirstEnabledCommand()}},{key:"_getFirstEnabledCommand",value:function(){return this._childCommands.find((function(e){return e.isEnabled}))}}]),t}(Al),Vd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.commands.add("indent",new zd(e)),e.commands.add("outdent",new zd(e))}}],[{key:"pluginName",get:function(){return"IndentEditing"}}]),t}(xl),Bd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z"/><path d="M1.632 6.95L5.02 9.358a.4.4 0 0 1-.013.661l-3.39 2.207A.4.4 0 0 1 1 11.892V7.275a.4.4 0 0 1 .632-.326z"/></svg>\n',Ud='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M2 3.75c0 .414.336.75.75.75h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 0 0-.75.75zm5 6c0 .414.336.75.75.75h9.5a.75.75 0 1 0 0-1.5h-9.5a.75.75 0 0 0-.75.75zM2.75 16.5h14.5a.75.75 0 1 0 0-1.5H2.75a.75.75 0 1 0 0 1.5z"/><path d="M4.368 6.95L.98 9.358a.4.4 0 0 0 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n,r=arguments.length>1&&void 0!==arguments[1]?arguments[1]:[];f(this,t),n=h(this,p(t).call(this,e));var i=e.t;n.focusTracker=new vs,n.keystrokes=new ss,n.urlInputView=n._createUrlInput(),n.saveButtonView=n._createButton(i("bf"),xf,"ck-button-save"),n.saveButtonView.type="submit",n.cancelButtonView=n._createButton(i("bg"),Tf,"ck-button-cancel","cancel"),n._manualDecoratorSwitches=n._createManualDecoratorSwitches(r),n.children=n._createFormChildren(r),n._focusables=new xs,n._focusCycler=new Js({focusables:n._focusables,focusTracker:n.focusTracker,keystrokeHandler:n.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}});var o=["ck","ck-link-form"];return r.length&&o.push("ck-link-form_layout-vertical"),n.setTemplate({tag:"form",attributes:{class:o,tabindex:"-1"},children:n.children}),n}return v(t,e),d(t,[{key:"getDecoratorSwitchesState",value:function(){return Array.from(this._manualDecoratorSwitches).reduce((function(e,t){return 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hl(t.locale);r.set({name:e.id,label:e.label,withText:!0}),r.bind("isOn").to(e,"value"),r.on("execute",(function(){e.set("value",!r.isOn)})),n.add(r)},l=e[Symbol.iterator]();!(r=(a=l.next()).done);r=!0)s()}catch(u){i=!0,o=u}finally{try{r||null==l.return||l.return()}finally{if(i)throw o}}return n}},{key:"_createFormChildren",value:function(e){var t=this.createCollection();if(t.add(this.urlInputView),e.length){var n=new Hs;n.setTemplate({tag:"ul",children:this._manualDecoratorSwitches.map((function(e){return{tag:"li",children:[e],attributes:{class:["ck","ck-list__item"]}}})),attributes:{class:["ck","ck-reset","ck-list"]}}),t.add(n)}return t.add(this.saveButtonView),t.add(this.cancelButtonView),t}}]),t}(Hs),Yd='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 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e=this;l(p(t.prototype),"render",this).call(this),[this.previewButtonView,this.editButtonView,this.unlinkButtonView].forEach((function(t){e._focusables.add(t),e.focusTracker.add(t.element)})),this.keystrokes.listenTo(this.element)}},{key:"focus",value:function(){this._focusCycler.focusFirst()}},{key:"_createButton",value:function(e,t,n){var r=new ll(this.locale);return r.set({label:e,icon:t,tooltip:!0}),r.delegate("execute").to(this,n),r}},{key:"_createPreviewButton",value:function(){var e=new ll(this.locale),t=this.bindTemplate,n=this.t;return e.set({withText:!0,tooltip:n("bd")}),e.extendTemplate({attributes:{class:["ck","ck-link-actions__preview"],href:t.to("href",(function(e){return e&&Uc(e)})),target:"_blank",rel:"noopener noreferrer"}}),e.bind("label").to(this,"href",(function(e){return e||n("be")})),e.bind("isEnabled").to(this,"href",(function(e){return!!e})),e.template.tag="a",e.template.eventListeners={},e}}]),t}(Hs),Qd="Ctrl+K",Kd=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"init",value:function(){var e=this.editor;e.editing.view.addObserver(qd),this.actionsView=this._createActionsView(),this.formView=this._createFormView(),this._balloon=e.plugins.get(Rf),this._createToolbarLinkButton(),this._enableUserBalloonInteractions()}},{key:"destroy",value:function(){l(p(t.prototype),"destroy",this).call(this),this.formView.destroy()}},{key:"_createActionsView",value:function(){var e=this,t=this.editor,n=new Gd(t.locale),r=t.commands.get("link"),i=t.commands.get("unlink");return n.bind("href").to(r,"value"),n.editButtonView.bind("isEnabled").to(r),n.unlinkButtonView.bind("isEnabled").to(i),this.listenTo(n,"edit",(function(){e._addFormView()})),this.listenTo(n,"unlink",(function(){t.execute("unlink"),e._hideUI()})),n.keystrokes.set("Esc",(function(t,n){e._hideUI(),n()})),n.keystrokes.set(Qd,(function(t,n){e._addFormView(),n()})),n}},{key:"_createFormView",value:function(){var e=this,t=this.editor,n=t.commands.get("link"),r=new Wd(t.locale,n.manualDecorators);return r.urlInputView.bind("value").to(n,"value"),r.urlInputView.bind("isReadOnly").to(n,"isEnabled",(function(e){return!e})),r.saveButtonView.bind("isEnabled").to(n),this.listenTo(r,"submit",(function(){t.execute("link",r.urlInputView.inputView.element.value,r.getDecoratorSwitchesState()),e._closeFormView()})),this.listenTo(r,"cancel",(function(){e._closeFormView()})),r.keystrokes.set("Esc",(function(t,n){e._closeFormView(),n()})),r}},{key:"_createToolbarLinkButton",value:function(){var e=this,t=this.editor,n=t.commands.get("link"),r=t.t;t.keystrokes.set(Qd,(function(t,r){r(),n.isEnabled&&e._showUI(!0)})),t.ui.componentFactory.add("link",(function(t){var i=new ll(t);return i.isEnabled=!0,i.label=r("as"),i.icon='<svg viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><path d="M11.077 15l.991-1.416a.75.75 0 1 1 1.229.86l-1.148 1.64a.748.748 0 0 1-.217.206 5.251 5.251 0 0 1-8.503-5.955.741.741 0 0 1 .12-.274l1.147-1.639a.75.75 0 1 1 1.228.86L4.933 10.7l.006.003a3.75 3.75 0 0 0 6.132 4.294l.006.004zm5.494-5.335a.748.748 0 0 1-.12.274l-1.147 1.639a.75.75 0 1 1-1.228-.86l.86-1.23a3.75 3.75 0 0 0-6.144-4.301l-.86 1.229a.75.75 0 0 1-1.229-.86l1.148-1.64a.748.748 0 0 1 .217-.206 5.251 5.251 0 0 1 8.503 5.955zm-4.563-2.532a.75.75 0 0 1 .184 1.045l-3.155 4.505a.75.75 0 1 1-1.229-.86l3.155-4.506a.75.75 0 0 1 1.045-.184z"/></svg>',i.keystroke=Qd,i.tooltip=!0,i.isToggleable=!0,i.bind("isEnabled").to(n,"isEnabled"),i.bind("isOn").to(n,"value",(function(e){return!!e})),e.listenTo(i,"execute",(function(){return e._showUI(!0)})),i}))}},{key:"_enableUserBalloonInteractions",value:function(){var e=this,t=this.editor.editing.view.document;this.listenTo(t,"click",(function(){e._getSelectedLinkElement()&&e._showUI()})),this.editor.keystrokes.set("Tab",(function(t,n){e._areActionsVisible&&!e.actionsView.focusTracker.isFocused&&(e.actionsView.focus(),n())}),{priority:"high"}),this.editor.keystrokes.set("Esc",(function(t,n){e._isUIVisible&&(e._hideUI(),n())})),pl({emitter:this.formView,activator:function(){return e._isUIInPanel},contextElements:[this._balloon.view.element],callback:function(){return e._hideUI()}})}},{key:"_addActionsView",value:function(){this._areActionsInPanel||this._balloon.add({view:this.actionsView,position:this._getBalloonPositionData()})}},{key:"_addFormView",value:function(){if(!this._isFormInPanel){var e=this.editor.commands.get("link");this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),this._balloon.visibleView===this.formView&&this.formView.urlInputView.select(),this.formView.urlInputView.inputView.element.value=e.value||""}}},{key:"_closeFormView",value:function(){var e=this.editor.commands.get("link");e.restoreManualDecoratorStates(),void 0!==e.value?this._removeFormView():this._hideUI()}},{key:"_removeFormView",value:function(){this._isFormInPanel&&(this.formView.saveButtonView.focus(),this._balloon.remove(this.formView),this.editor.editing.view.focus())}},{key:"_showUI",value:function(){var e=arguments.length>0&&void 0!==arguments[0]&&arguments[0];this.editor.commands.get("link").isEnabled&&(this._getSelectedLinkElement()?(this._areActionsVisible?this._addFormView():this._addActionsView(),e&&this._balloon.showStack("main")):(this._addActionsView(),e&&this._balloon.showStack("main"),this._addFormView()),this._startUpdatingUI())}},{key:"_hideUI",value:function(){if(this._isUIInPanel){var e=this.editor;this.stopListening(e.ui,"update"),this.stopListening(this._balloon,"change:visibleView"),e.editing.view.focus(),this._removeFormView(),this._balloon.remove(this.actionsView)}}},{key:"_startUpdatingUI",value:function(){var e=this,t=this.editor,n=t.editing.view.document,r=this._getSelectedLinkElement(),i=a(),o=function(){var t=e._getSelectedLinkElement(),n=a();r&&!t||!r&&n!==i?e._hideUI():e._isUIVisible&&e._balloon.updatePosition(e._getBalloonPositionData()),r=t,i=n};function a(){return n.selection.focus.getAncestors().reverse().find((function(e){return e.is("element")}))}this.listenTo(t.ui,"update",o),this.listenTo(this._balloon,"change:visibleView",o)}},{key:"_getBalloonPositionData",value:function(){var e=this.editor.editing.view,t=e.document,n=this._getSelectedLinkElement();return{target:n?e.domConverter.mapViewToDom(n):e.domConverter.viewRangeToDom(t.selection.getFirstRange())}}},{key:"_getSelectedLinkElement",value:function(){var e=this.editor.editing.view,t=e.document.selection;if(t.isCollapsed)return Jd(t.getFirstPosition());var n=t.getFirstRange().getTrimmed(),r=Jd(n.start),i=Jd(n.end);return r&&r==i&&e.createRangeIn(r).getTrimmed().isEqual(n)?r:null}},{key:"_isFormInPanel",get:function(){return this._balloon.hasView(this.formView)}},{key:"_areActionsInPanel",get:function(){return this._balloon.hasView(this.actionsView)}},{key:"_areActionsVisible",get:function(){return this._balloon.visibleView===this.actionsView}},{key:"_isUIInPanel",get:function(){return this._isFormInPanel||this._areActionsInPanel}},{key:"_isUIVisible",get:function(){return this._balloon.visibleView==this.formView||this._areActionsVisible}}],[{key:"requires",get:function(){return[Rf]}},{key:"pluginName",get:function(){return"LinkUI"}}]),t}(xl);function Jd(e){return e.getAncestors().find((function(e){return function(e){return e.is("attributeElement")&&!!e.getCustomProperty("link")}(e)}))}var Xd=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e))).type=n,r}return v(t,e),d(t,[{key:"refresh",value:function(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}},{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document,r=Array.from(n.selection.getSelectedBlocks()).filter((function(e){return eh(e,t.schema)})),i=!0===this.value;t.change((function(t){if(i){for(var n=r[r.length-1].nextSibling,o=Number.POSITIVE_INFINITY,a=[];n&&"listItem"==n.name&&0!==n.getAttribute("listIndent");){var s=n.getAttribute("listIndent");s<o&&(o=s);var l=s-o;a.push({element:n,listIndent:l}),n=n.nextSibling}a=a.reverse();var u=!0,c=!1,f=void 0;try{for(var d,h=a[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value;t.setAttribute("listIndent",p.listIndent,p.element)}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}if(!i){var v=Number.POSITIVE_INFINITY,m=!0,g=!1,y=void 0;try{for(var b,k=r[Symbol.iterator]();!(m=(b=k.next()).done);m=!0){var w=b.value;w.is("listItem")&&w.getAttribute("listIndent")<v&&(v=w.getAttribute("listIndent"))}}catch(A){g=!0,y=A}finally{try{m||null==k.return||k.return()}finally{if(g)throw y}}Zd(r,!0,v=0===v?1:v),Zd(r,!1,v)}var _=!0,x=!1,T=void 0;try{for(var C,S=r.reverse()[Symbol.iterator]();!(_=(C=S.next()).done);_=!0){var E=C.value;i&&"listItem"==E.name?t.rename(E,"paragraph"):i||"listItem"==E.name?i||"listItem"!=E.name||E.getAttribute("listType")==e.type||t.setAttribute("listType",e.type,E):(t.setAttributes({listType:e.type,listIndent:0},E),t.rename(E,"listItem"))}}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}}))}},{key:"_getValue",value:function(){var e=Uu(this.editor.model.document.selection.getSelectedBlocks());return!!e&&e.is("listItem")&&e.getAttribute("listType")==this.type}},{key:"_checkEnabled",value:function(){if(this.value)return!0;var e=this.editor.model.document.selection,t=this.editor.model.schema,n=Uu(e.getSelectedBlocks());return!!n&&eh(n,t)}}]),t}(Al);function Zd(e,t,n){var r=t?e[0]:e[e.length-1];if(r.is("listItem"))for(var i=r[t?"previousSibling":"nextSibling"],o=r.getAttribute("listIndent");i&&i.is("listItem")&&i.getAttribute("listIndent")>=n;)o>i.getAttribute("listIndent")&&(o=i.getAttribute("listIndent")),i.getAttribute("listIndent")==o&&e[t?"unshift":"push"](i),i=i[t?"previousSibling":"nextSibling"]}function eh(e,t){return t.checkChild(e.parent,"listItem")&&!t.isObject(e)}var th=function(e){function t(e,n){var r;return f(this,t),(r=h(this,p(t).call(this,e)))._indentBy="forward"==n?1:-1,r}return v(t,e),d(t,[{key:"refresh",value:function(){this.isEnabled=this._checkEnabled()}},{key:"execute",value:function(){var e=this,t=this.editor.model,n=t.document,r=Array.from(n.selection.getSelectedBlocks());t.change((function(t){for(var n=r[r.length-1],i=n.nextSibling;i&&"listItem"==i.name&&i.getAttribute("listIndent")>n.getAttribute("listIndent");)r.push(i),i=i.nextSibling;e._indentBy<0&&(r=r.reverse());var o=!0,a=!1,s=void 0;try{for(var l,u=r[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value,f=c.getAttribute("listIndent")+e._indentBy;f<0?t.rename(c,"paragraph"):t.setAttribute("listIndent",f,c)}}catch(d){a=!0,s=d}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}))}},{key:"_checkEnabled",value:function(){var e=Uu(this.editor.model.document.selection.getSelectedBlocks());if(!e||!e.is("listItem"))return!1;if(this._indentBy>0){for(var t=e.getAttribute("listIndent"),n=e.getAttribute("listType"),r=e.previousSibling;r&&r.is("listItem")&&r.getAttribute("listIndent")>=t;){if(r.getAttribute("listIndent")==t)return r.getAttribute("listType")==n;r=r.previousSibling}return!1}return!0}}]),t}(Al);function nh(e,t,n,r){var i=t.parent,o=n.mapper,a=n.writer,s=o.toViewPosition(r.createPositionBefore(e)),l=oh(e.previousSibling,{sameIndent:!0,smallerIndent:!0,listIndent:e.getAttribute("listIndent")}),u=e.previousSibling;if(l&&l.getAttribute("listIndent")==e.getAttribute("listIndent")){var c=o.toViewElement(l);s=a.breakContainer(a.createPositionAfter(c))}else s=u&&"listItem"==u.name?o.toViewPosition(r.createPositionAt(u,"end")):o.toViewPosition(r.createPositionBefore(e));if(s=ih(s),a.insert(s,i),u&&"listItem"==u.name){var f=o.toViewElement(u),d=a.createRange(a.createPositionAt(f,0),s).getWalker({ignoreElementEnd:!0}),h=!0,p=!1,v=void 0;try{for(var m,g=d[Symbol.iterator]();!(h=(m=g.next()).done);h=!0){var y=m.value;if(y.item.is("li")){var b=a.breakContainer(a.createPositionBefore(y.item)),k=y.item.parent,w=a.createPositionAt(t,"end");rh(a,w.nodeBefore,w.nodeAfter),a.move(a.createRangeOn(k),w),d.position=b}}}catch(N){p=!0,v=N}finally{try{h||null==g.return||g.return()}finally{if(p)throw v}}}else{var _=i.nextSibling;if(_&&(_.is("ul")||_.is("ol"))){var x=null,T=!0,C=!1,S=void 0;try{for(var E,A=_.getChildren()[Symbol.iterator]();!(T=(E=A.next()).done);T=!0){var P=E.value,M=o.toModelElement(P);if(!(M&&M.getAttribute("listIndent")>e.getAttribute("listIndent")))break;x=P}}catch(N){C=!0,S=N}finally{try{T||null==A.return||A.return()}finally{if(C)throw S}}x&&(a.breakContainer(a.createPositionAfter(x)),a.move(a.createRangeOn(x.parent),a.createPositionAt(t,"end")))}}rh(a,i,i.nextSibling),rh(a,i.previousSibling,i)}function rh(e,t,n){return!t||!n||"ul"!=t.name&&"ol"!=t.name?null:t.name!=n.name||t.getAttribute("class")!==n.getAttribute("class")?null:e.mergeContainers(e.createPositionAfter(t))}function ih(e){return e.getLastMatchingPosition((function(e){return e.item.is("uiElement")}))}function oh(e,t){for(var n=!!t.sameIndent,r=!!t.smallerIndent,i=t.listIndent,o=e;o&&"listItem"==o.name;){var a=o.getAttribute("listIndent");if(n&&i==a||r&&i>a)return o;o=o.previousSibling}return null}function ah(e,t,n,r){e.ui.componentFactory.add(t,(function(i){var o=e.commands.get(t),a=new ll(i);return a.set({label:n,icon:r,tooltip:!0,isToggleable:!0}),a.bind("isOn","isEnabled").to(o,"value","isEnabled"),a.on("execute",(function(){return e.execute(t)})),a}))}function sh(){var e=!this.isEmpty&&("ul"==this.getChild(0).name||"ol"==this.getChild(0).name);return this.isEmpty||e?0:sn.call(this)}function lh(e){return function(t,n,r){var i=r.consumable;if(i.test(n.item,"insert")&&i.test(n.item,"attribute:listType")&&i.test(n.item,"attribute:listIndent")){i.consume(n.item,"insert"),i.consume(n.item,"attribute:listType"),i.consume(n.item,"attribute:listIndent");var o=n.item;nh(o,function(e,t){var n=t.mapper,r=t.writer,i="numbered"==e.getAttribute("listType")?"ol":"ul",o=function(e){var t=e.createContainerElement("li");return t.getFillerOffset=sh,t}(r),a=r.createContainerElement(i,null);return r.insert(r.createPositionAt(a,0),o),n.bindElements(e,o),o}(o,r),r,e)}}}function uh(e,t,n){if(n.consumable.consume(t.item,"attribute:listType")){var r=n.mapper.toViewElement(t.item),i=n.writer;i.breakContainer(i.createPositionBefore(r)),i.breakContainer(i.createPositionAfter(r));var o=r.parent,a="numbered"==t.attributeNewValue?"ol":"ul";i.rename(a,o)}}function ch(e,t,n){var r=n.mapper.toViewElement(t.item).parent,i=n.writer;rh(i,r,r.nextSibling),rh(i,r.previousSibling,r);var o=!0,a=!1,s=void 0;try{for(var l,u=t.item.getChildren()[Symbol.iterator]();!(o=(l=u.next()).done);o=!0){var c=l.value;n.consumable.consume(c,"insert")}}catch(f){a=!0,s=f}finally{try{o||null==u.return||u.return()}finally{if(a)throw s}}}function fh(e,t,n){if("listItem"!=t.item.name){for(var r=n.mapper.toViewPosition(t.range.start),i=n.writer,o=[];("ul"==r.parent.name||"ol"==r.parent.name)&&"li"==(r=i.breakContainer(r)).parent.name;){var a=r,s=i.createPositionAt(r.parent,"end");if(!a.isEqual(s)){var l=i.remove(i.createRange(a,s));o.push(l)}r=i.createPositionAfter(r.parent)}if(o.length>0){for(var u=0;u<o.length;u++){var c=r.nodeBefore;if(r=i.insert(r,o[u]).end,u>0){var f=rh(i,c,c.nextSibling);f&&f.parent==c&&r.offset--}}rh(i,r.nodeBefore,r.nodeAfter)}}}function dh(e,t,n){var r=n.mapper.toViewPosition(t.position),i=r.nodeBefore,o=r.nodeAfter;rh(n.writer,i,o)}function hh(e,t,n){if(n.consumable.consume(t.viewItem,{name:!0})){var r=n.writer,i=r.createElement("listItem"),o=function(e){for(var t=0,n=e.parent;n;){if(n.is("li"))t++;else{var r=n.previousSibling;r&&r.is("li")&&t++}n=n.parent}return t}(t.viewItem);r.setAttribute("listIndent",o,i);var a=t.viewItem.parent&&"ol"==t.viewItem.parent.name?"numbered":"bulleted";r.setAttribute("listType",a,i);var s=n.splitToAllowedParent(i,t.modelCursor);if(!s)return;r.insert(i,s.position);var l=function(e,t,n){var r=n.writer,i=n.schema,o=r.createPositionAfter(e),a=!0,s=!1,l=void 0;try{for(var u,c=t[Symbol.iterator]();!(a=(u=c.next()).done);a=!0){var f=u.value;if("ul"==f.name||"ol"==f.name)o=n.convertItem(f,o).modelCursor;else{var d=n.convertItem(f,r.createPositionAt(e,"end")),h=d.modelRange.start.nodeAfter;h&&h.is("element")&&!i.checkChild(e,h.name)&&(e=d.modelCursor.parent.is("listItem")?d.modelCursor.parent:yh(d.modelCursor),o=r.createPositionAfter(e))}}}catch(p){s=!0,l=p}finally{try{a||null==c.return||c.return()}finally{if(s)throw l}}return o}(i,t.viewItem.getChildren(),n);t.modelRange=r.createRange(t.modelCursor,l),s.cursorParent?t.modelCursor=r.createPositionAt(s.cursorParent,0):t.modelCursor=t.modelRange.end}}function ph(e,t,n){if(n.consumable.test(t.viewItem,{name:!0}))for(var r=0,i=Array.from(t.viewItem.getChildren());r<i.length;r++){var o=i[r];!o.is("li")&&!kh(o)&&o._remove()}}function vh(e,t,n){if(n.consumable.test(t.viewItem,{name:!0})){if(0===t.viewItem.childCount)return;var r=u(t.viewItem.getChildren()),i=!1,o=!0,a=!0,s=!1,l=void 0;try{for(var c,f=r[Symbol.iterator]();!(a=(c=f.next()).done);a=!0){var 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u=o.toModelElement(i),c=1,f=r.nodeBefore;f&&kh(f);)c+=o.getModelLength(f),f=f.previousSibling;t.modelPosition=n.createPositionBefore(u).getShiftedBy(c),e.stop()}})),r.mapper.on("modelToViewPosition",mh(i.view)),t.conversion.for("editingDowncast").add((function(e){e.on("insert",fh,{priority:"high"}),e.on("insert:listItem",lh(t.model)),e.on("attribute:listType:listItem",uh,{priority:"high"}),e.on("attribute:listType:listItem",ch,{priority:"low"}),e.on("attribute:listIndent:listItem",function(e){return function(t,n,r){if(r.consumable.consume(n.item,"attribute:listIndent")){var i=r.mapper.toViewElement(n.item),o=r.writer;o.breakContainer(o.createPositionBefore(i)),o.breakContainer(o.createPositionAfter(i));var a=i.parent,s=a.previousSibling,l=o.createRangeOn(a);o.remove(l),s&&s.nextSibling&&rh(o,s,s.nextSibling),bh(n.attributeOldValue+1,n.range.start,l.start,i,r,e),nh(n.item,i,r,e);var u=!0,c=!1,f=void 0;try{for(var 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0!==this.column&&this.column!=this._column}},{key:"_isSpanned",value:function(e,t){return!!this._spannedCells.has(e)&&this._spannedCells.get(e).has(t)}},{key:"_getSpanned",value:function(e,t){return this._spannedCells.get(e).get(t)}},{key:"_recordSpans",value:function(e,t,n,r,i){for(var o=t+1;o<=t+r-1;o++)this._markSpannedCell(e,o,i);for(var a=e+1;a<e+n;a++)for(var s=t;s<=t+r-1;s++)this._markSpannedCell(a,s,i)}},{key:"_markSpannedCell",value:function(e,t,n){this._spannedCells.has(e)||this._spannedCells.set(e,new Map),this._spannedCells.get(e).set(t,n)}}]),e}();function Kh(e){return!!e.getCustomProperty("table")&&oc(e)}function Jh(e){var t=e.getSelectedElement();return t&&Kh(t)?t:null}function Xh(e){var t=qh("table",e.getFirstPosition());return t&&Kh(t.parent)?t.parent:null}function Zh(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};return function(t){return t.on("insert:table",(function(t,n,r){var 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i=n.item;if(r.consumable.consume(i,"insert")){var o=i.parent,a=o.parent,s=a.getChildIndex(o),l=new Qh(a,{startRow:s,endRow:s}),u={headingRows:a.getAttribute("headingRows")||0,headingColumns:a.getAttribute("headingColumns")||0},c=!0,f=!1,d=void 0;try{for(var h,p=l[Symbol.iterator]();!(c=(h=p.next()).done);c=!0){var v=h.value;if(v.cell===i){var m=r.mapper.toViewElement(o);return void ap(v,u,r.writer.createPositionAt(m,o.getChildIndex(i)),r,e)}}}catch(g){f=!0,d=g}finally{try{c||null==p.return||p.return()}finally{if(f)throw d}}}}))}}function np(){var e=!!(arguments.length>0&&void 0!==arguments[0]?arguments[0]:{}).asWidget;return function(t){return t.on("attribute:headingRows:table",(function(t,n,r){var i=n.item;if(r.consumable.consume(n.item,t.name)){var o=pp(r.mapper.toViewElement(i)),a=n.attributeOldValue,s=n.attributeNewValue;if(s>a){var l=Array.from(i.getChildren()).filter((function(e){return E(e.index,a-1,s)}));hp(l,cp("thead",o,r),r,"end");var u=!0,c=!1,f=void 0;try{for(var d,h=l[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var p=d.value,v=!0,m=!1,g=void 0;try{for(var y,b=p.getChildren()[Symbol.iterator]();!(v=(y=b.next()).done);v=!0)ip(y.value,"th",r,e)}catch(A){m=!0,g=A}finally{try{v||null==b.return||b.return()}finally{if(m)throw g}}}}catch(A){c=!0,f=A}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}dp("tbody",o,r)}else{hp(Array.from(i.getChildren()).filter((function(e){return E(e.index,s-1,a)})).reverse(),cp("tbody",o,r),r,0);var k=new Qh(i,{startRow:s?s-1:s,endRow:a-1}),w={headingRows:i.getAttribute("headingRows")||0,headingColumns:i.getAttribute("headingColumns")||0},_=!0,x=!1,T=void 0;try{for(var C,S=k[Symbol.iterator]();!(_=(C=S.next()).done);_=!0)op(C.value,w,r,e)}catch(A){x=!0,T=A}finally{try{_||null==S.return||S.return()}finally{if(x)throw T}}dp("thead",o,r)}}function E(e,t,n){return e>t&&e<n}}))}}function rp(){var e=!!(arguments.length>0&&void 0!==arguments[0]?arguments[0]:{}).asWidget;return function(t){return 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o=i&&i.asWidget,a=lp(e,t),s=o?lc(r.writer.createEditableElement(a),r.writer):r.writer.createContainerElement(a),l=e.cell,c=l.getChild(0),f=1===l.childCount&&"paragraph"===c.name;if(r.writer.insert(n,s),f&&!u(c.getAttributeKeys()).length){var d=l.getChild(0),h=r.writer.createPositionAt(s,"end");if(r.consumable.consume(d,"insert"),i.asWidget){var p=r.writer.createContainerElement("span");r.mapper.bindElements(d,p),r.writer.insert(h,p),r.mapper.bindElements(l,s)}else r.mapper.bindElements(l,s),r.mapper.bindElements(d,s)}else r.mapper.bindElements(l,s)}function sp(e,t,n,r){r.consumable.consume(e,"insert");var i=r.writer.createContainerElement("tr");r.mapper.bindElements(e,i);var o=e.parent.getAttribute("headingRows")||0,a=o>0&&t>=o?t-o:t,s=r.writer.createPositionAt(n,a);return r.writer.insert(s,i),i}function lp(e,t){var n=e.row,r=e.column,i=t.headingColumns,o=t.headingRows;return o&&o>n?"th":i&&i>r?"th":"td"}function up(e,t){return e<t.headingRows?"thead":"tbody"}function cp(e,t,n){return 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e=this.editor.model,t=qh("tableCell",e.document.selection.getFirstPosition()),n=t.parent,r=n.parent,i=r.getAttribute("headingColumns")||0,o=r.getChildIndex(n),a=u(new Qh(r)),s=a.find((function(e){return e.cell===t})).column;e.change((function(e){i&&o<=i&&e.setAttribute("headingColumns",i-1,r);var t=!0,n=!1,l=void 0;try{for(var u,c=a[Symbol.iterator]();!(t=(u=c.next()).done);t=!0){var f=u.value,d=f.cell,h=f.column,p=f.colspan;h<=s&&p>1&&h+p>s?Wh("colspan",p-1,d,e):h===s&&e.remove(d)}}catch(v){n=!0,l=v}finally{try{t||null==c.return||c.return()}finally{if(n)throw l}}}))}}]),t}(Al),xp=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=qh("tableCell",this.editor.model.document.selection.getFirstPosition()),t=!!e;this.isEnabled=t,this.value=t&&this._isInHeading(e,e.parent.parent)}},{key:"execute",value:function(){var e=arguments.length>0&&void 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r=e.parent,i=r.parent,o=t-r.index,a={},s=parseInt(e.getAttribute("rowspan"))-o;s>1&&(a.rowspan=s);var l=parseInt(e.getAttribute("colspan")||1);l>1&&(a.colspan=l);var c,f=i.getChildIndex(r),d=f+o,h=u(new Qh(i,{startRow:f,endRow:d,includeSpanned:!0})),p=!0,v=!1,m=void 0;try{for(var g,y=h[Symbol.iterator]();!(p=(g=y.next()).done);p=!0){var b=g.value,k=b.row,w=b.column,_=b.cell,x=b.cellIndex;if(_===e&&void 0===c&&(c=w),void 0!==c&&c===w&&k===d){var T=i.getChild(k),C=n.createPositionAt(T,x);Yh(n,C,a)}}}catch(S){v=!0,m=S}finally{try{p||null==y.return||y.return()}finally{if(v)throw m}}Wh("rowspan",o,e,n)}var Cp=function(e){function t(){return f(this,t),h(this,p(t).apply(this,arguments))}return v(t,e),d(t,[{key:"refresh",value:function(){var e=qh("tableCell",this.editor.model.document.selection.getFirstPosition()),t=!!e;this.isEnabled=t,this.value=t&&this._isInHeading(e,e.parent.parent)}},{key:"execute",value:function(){var e=arguments.length>0&&void 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p=d.value;if("thead"===p.parent.name&&p.parent===t)n.headingRows++,r.push(p);else{i.push(p);var v=Gh(p);v>n.headingColumns&&(n.headingColumns=v)}}}catch(m){c=!0,f=m}finally{try{u||null==h.return||h.return()}finally{if(c)throw f}}}}return n.rows=[].concat(r,i),n}(r),o=i.rows,a=i.headingRows,s=i.headingColumns,l={};s&&(l.headingColumns=s),a&&(l.headingRows=a);var u=n.writer.createElement("table",l),c=n.splitToAllowedParent(u,t.modelCursor);if(c){if(n.writer.insert(u,c.position),n.consumable.consume(r,{name:!0}),o.length)o.forEach((function(e){return n.convertItem(e,n.writer.createPositionAt(u,"end"))}));else{var f=n.writer.createElement("tableRow");n.writer.insert(f,n.writer.createPositionAt(u,"end")),Yh(n.writer,n.writer.createPositionAt(f,"end"))}t.modelRange=n.writer.createRange(n.writer.createPositionBefore(u),n.writer.createPositionAfter(u)),c.cursorParent?t.modelCursor=n.writer.createPositionAt(c.cursorParent,0):t.modelCursor=t.modelRange.end}}}))})),i.for("editingDowncast").add(Zh({asWidget:!0})),i.for("dataDowncast").add(Zh()),i.for("upcast").elementToElement({model:"tableRow",view:"tr"}),i.for("editingDowncast").add(ep({asWidget:!0})),i.for("dataDowncast").add(ep()),i.for("downcast").add((function(e){return e.on("remove:tableRow",(function(e,t,n){e.stop();var r=n.writer,i=n.mapper,o=i.toViewPosition(t.position).getLastMatchingPosition((function(e){return!e.item.is("tr")})).nodeAfter,a=o.parent,s=r.createRangeOn(o),l=r.remove(s),u=!0,c=!1,f=void 0;try{for(var d,h=r.createRangeIn(l).getItems()[Symbol.iterator]();!(u=(d=h.next()).done);u=!0){var 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React from \"react\";\r\n\r\nexport default function Container(props) {\r\n return (\r\n <div className=\"container\">{props.children}</div>\r\n )\r\n}","import React from \"react\";\r\nimport Container from \"../container/container\";\r\nimport './footer.scss'\r\n\r\nexport default function Footer() {\r\n return (<footer className=\"footer\">\r\n <Container>\r\n <p>Разработка Дмитриев Максим. © 2019 г.</p>\r\n </Container>\r\n </footer>);\r\n}\r\n","import toastr from 'toastr';\r\n\r\ntoastr.options = {\r\n closeButton: false,\r\n debug: false,\r\n newestOnTop: false,\r\n progressBar: true,\r\n positionClass: `toast-top-center`,\r\n onclick: null,\r\n showDuration: `300`,\r\n hideDuration: `1000`,\r\n extendedTimeOut: `1000`,\r\n showEasing: `swing`,\r\n hideEasing: `linear`,\r\n showMethod: `fadeIn`,\r\n hideMethod: `fadeOut`\r\n};\r\n/**\r\n * Сообщение для пользователя\r\n * @param {String} type (`info`, `success`, `warning`, `error`)\r\n * @param {String} message `text`\r\n * @param {String} title `text`\r\n * @param {Number} time\r\n */\r\nconst showMessage = (type, message, title = ``, options = { time: 5000, preventDuplicates: false }) => {\r\n toastr.options.timeOut = options.time;\r\n toastr.options.preventDuplicates = options.preventDuplicates;\r\n if (title) {\r\n toastr[type](message, title)\r\n } else {\r\n toastr[type](message)\r\n }\r\n};\r\n/**\r\n * Типы сообщений для функции showMessage\r\n */\r\nconst TypeMessage = {\r\n INFO: `info`,\r\n SUCCESS: `success`,\r\n WARNING: `warning`,\r\n ERROR: `error`\r\n};\r\n\r\nexport { showMessage, TypeMessage }\r\n","/**\r\n * Функция для проверки длины строки, в промежутке - >= && <=\r\n * @param str\r\n * @param minLengthStr\r\n * @param maxLengthStr\r\n * @returns {boolean|boolean}\r\n */\r\nexport const checkLengthMinMaxStr = (str, minLengthStr, maxLengthStr) => {\r\n return (str.length >= minLengthStr) && (str.length <= maxLengthStr);\r\n};\r\n/**\r\n * Истекла ли задача\r\n * @param dateTask - дата задачи.\r\n * @returns {boolean}\r\n */\r\nexport const hasDateExpired = (dateTask) => {\r\n const today = new Date().getTime();\r\n const dateEnd = new Date(reverseDate(dateTask)).getTime();\r\n \r\n return dateEnd < today;\r\n};\r\n/**\r\n * Получение Cookie по имени\r\n * @param name - имя Cookie\r\n * @returns {any}\r\n */\r\nexport const getCookie = (name) => {\r\n let matches = document.cookie.match(new RegExp(\r\n // eslint-disable-next-line no-useless-escape\r\n \"(?:^|; )\" + name.replace(/([\\.$?*|{}\\(\\)\\[\\]\\\\\\/\\+^])/g, '\\\\$1') + \"=([^;]*)\"\r\n ));\r\n return matches ? decodeURIComponent(matches[1]) : undefined;\r\n};\r\n/**\r\n * Устанавливает куки с именем name и значением value c опциями.\r\n * @param {String} name \r\n * @param {String} value\r\n * @param {Object} options \r\n */\r\nfunction setCookie(name, value, options = {}) {\r\n options = {\r\n path: '/',\r\n ...options\r\n };\r\n\r\n if (options.expires instanceof Date) {\r\n options.expires = options.expires.toUTCString();\r\n }\r\n\r\n let updatedCookie = encodeURIComponent(name) + \"=\" + encodeURIComponent(value);\r\n\r\n for (let optionKey in options) {\r\n updatedCookie += \"; \" + optionKey;\r\n let optionValue = options[optionKey];\r\n if (optionValue !== true) {\r\n updatedCookie += \"=\" + optionValue;\r\n }\r\n }\r\n\r\n document.cookie = updatedCookie;\r\n}\r\n/**\r\n * Уддаление Cookie по её имени.\r\n * @param {String} name \r\n */\r\nexport const deleteCookie = (name) => {\r\n setCookie(name, \"\", {\r\n 'max-age': -1\r\n })\r\n}\r\n/**\r\n * Переворачивает дату с сервера для js\r\n * @param {String} date \r\n */\r\nexport const reverseDate = (date) => {\r\n return date.split('.').reverse().join('-');\r\n}\r\n/**\r\n * Возврашает заголовок для задач в зависимомти от активного скрина.\r\n * @param {String} url\r\n */\r\nexport const getActiveTitleTasks = (url, textSearch=\"\") => {\r\n switch (url) {\r\n case \"/my-tasks-done\":\r\n return \"Мои выполненые задачи.\";\r\n case \"/designated-tasks\":\r\n return \"Я назначил задачи.\";\r\n case \"/designated-tasks-done\":\r\n return \"Выполненные задачи другими.\";\r\n case \"/search\":\r\n return `Результаты поиска по запросу - \"${textSearch}\"`;\r\n default:\r\n return \"Мои задачи.\";\r\n }\r\n}\r\n/**\r\n * Удаление задачи. Для страниц с задачами.\r\n * @param {Object} tasks \r\n * @param {Number} idTask \r\n */\r\nexport const deleteTaskFromArrTasks = (tasks, idTask) => {\r\n let copyTasks = [...tasks];\r\n const indexTask = copyTasks.findIndex((task) => Number(task.task_id) === Number(idTask));\r\n if (indexTask !== -1) {\r\n // copyTasks[indexTask][\"task_status\"] = \"1\";\r\n copyTasks.splice(indexTask, 1);\r\n }\r\n \r\n return copyTasks;\r\n}\r\n/**\r\n * Изменение статуса задаи для страницы задач.\r\n * @param {Object} tasks\r\n * @param {Number} idTask\r\n */\r\nexport const changeStatusTask = (task) => {\r\n return Object.assign({}, task, { task_status: \"1\" });\r\n}\r\n/**\r\n * Полуение массива активных(изменяемых в зависимости от типа адреса) ссылок для меню.\r\n * @param {String} url \r\n */\r\nexport const getActiveMenuLinks = (url) => {\r\n switch (url) {\r\n case \"/\":\r\n return [\r\n { textLink: \"Выполненые задачи мною\", href: \"/my-tasks-done\" },\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n case \"/my-tasks-done\":\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n case \"/designated-tasks\":\r\n return [\r\n { textLink: \"Выполненые задачи другими\", href: \"/designated-tasks-done\" },\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n ]\r\n case \"/designated-tasks-done\":\r\n return [\r\n { textLink: \"Выполненые задачи другими\", href: \"/designated-tasks-done\" },\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n ]\r\n case \"/search\":\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n default:\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\" },\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n };\r\n}\r\n/**\r\n * Декадирование параметра поиска \r\n * @param {String} urlOrigin \r\n */\r\nexport const decodeParamsSearchUrl = (urlOrigin) => {\r\n if (!urlOrigin) {\r\n return '';\r\n }\r\n const url = new URL(urlOrigin);\r\n if (url.searchParams.has('q')) {\r\n const searchTextEncode = url.searchParams.get('q');\r\n const searchTextDecode = decodeURIComponent(searchTextEncode);\r\n\r\n return searchTextDecode;\r\n }\r\n}","import flatpickr from 'flatpickr';\r\nimport { Russian } from 'flatpickr/dist/l10n/ru';\r\n\r\nconst CONFIG_FLATPICKR = {\r\n locale: Russian,\r\n defaultDate: `today`,\r\n mode: `range`,\r\n dateFormat: `d.m.Y`,\r\n minDate: `today`,\r\n weekNumbers: true,\r\n wrap: true\r\n};\r\nlet fp;\r\n\r\n/**\r\n * Иницилизация flatpickr\r\n * @param elem\r\n */\r\nexport const initFlatpickr = (elem) => {\r\n fp = flatpickr(elem, CONFIG_FLATPICKR);\r\n fp.setDate(+new Date(), true, CONFIG_FLATPICKR.dateFormat);\r\n};\r\n/**\r\n * Размонтирование flatpickr\r\n */\r\nexport const destroyFlatpickr = () => {\r\n fp.destroy();\r\n}\r\n/**\r\n * Очишает данные в flatpickr и устанавливает текушую дату\r\n */\r\nexport const clearDataFlatpickr = () => {\r\n fp.clear();\r\n fp.setDate(+new Date(), true, CONFIG_FLATPICKR.dateFormat);\r\n};\r\n","import ClassicEditor from '@ckeditor/ckeditor5-build-classic';\r\nimport '@ckeditor/ckeditor5-build-classic/build/translations/ru';\r\n// import { showMessage, TypeMessage } from './show-user-message';\r\n\r\nconst CONFIG = {\r\n removePlugins: ['ImageUpload'],\r\n toolbar: ['Heading', 'bold', 'italic', '|', 'Link', 'bulletedList', 'numberedList', 'blockQuote', 'MediaEmbed', 'Undo', 'Redo'],\r\n language: 'ru',\r\n mediaEmbed: {\r\n previewsInData: true\r\n }\r\n};\r\nlet editor;\r\n/**\r\n * Инициализация ckeditor5\r\n * @param elem\r\n * @param fn - функция получения данных из редактора.\r\n */\r\nexport const initEditor = (elem, fn) => {\r\n // const MAX_CHARACTERS = 1000 || TEXTAREA.maxLength;\r\n\r\n ClassicEditor.create(elem, CONFIG)\r\n .then(newEditor => {\r\n editor = newEditor;\r\n editor.model.document.on('change:data', () => {\r\n const data = editor.getData();\r\n fn(data);\r\n });\r\n // return true\r\n })\r\n .catch(error => {\r\n console.error(error);\r\n });\r\n\r\n};\r\n/**\r\n * Размонтирование Редактора\r\n */\r\nexport const destroyEditor = () => {\r\n editor.destroy()\r\n .catch(error => {\r\n console.log(error);\r\n });\r\n}\r\n/**\r\n * Очишает введеные данные в ckeditor5\r\n */\r\nexport const clearDataEditor = () => {\r\n editor.setData('')\r\n};\r\n","/**\r\n * Получение моих задач\r\n */\r\nexport const fetchRequest = async (\r\n link,\r\n params = {\r\n method: 'GET',\r\n cache: 'no-store'\r\n }\r\n ) => {\r\n\r\n const response = await fetch(`/ajax/${link}`, params);\r\n\r\n return await response.json();\r\n};\r\n/**\r\n * Получение моих задач\r\n */\r\nexport const getMyTasks = () => fetchRequest('get-my-tasks.php?my-tasks=ajax');\r\n/**\r\n * Получение моих выполненых задач\r\n */\r\nexport const getMyTasksDone = () => fetchRequest('get-my-tasks-done.php?my-tasks-done=ajax');\r\n/**\r\n * Получение задач поставленных мною\r\n */\r\nexport const getDesignatedTasks = () => fetchRequest('get-designated-tasks.php?get-designated-task=ajax');\r\n/**\r\n * Выполненные задачи другими\r\n */\r\nexport const getDesignatedTasksDone = () => fetchRequest('get-designated-tasks-done.php?get-designated-task-done=ajax');\r\n/**\r\n * Получение всех ользователей\r\n */\r\nexport const getAllUsers = () => fetchRequest('get-all-users.php?all-users=ajax');\r\n/**\r\n * Выполнение задачи\r\n */\r\nexport const executeTask = (idTask) => fetchRequest(`execute-task.php?execute-task=ajax&action=execute&id=${idTask}`);\r\n/**\r\n * Добавление заддачи\r\n * @param {Object} formData \r\n */\r\nexport const addTask = (formData) => fetchRequest(\r\n `add-task.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Регистрация пользователя на сайте.\r\n * @param {Object} formData\r\n */\r\nexport const signUpUser = (formData) => fetchRequest(\r\n `signup.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Авторизация пользователя на сайте.\r\n * @param {Object} formData\r\n */\r\nexport const signInUser = (formData) => fetchRequest(\r\n `signin.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Выход с сайта.\r\n */\r\nexport const logOut = () => fetchRequest(`logout.php?logout=ajax&action=exit`);\r\n/**\r\n * Поиск задачи\r\n * @param {String} text \r\n */\r\nexport const getResultSearchText = (text) => fetchRequest(`get-result-search.php?search-field=${text}`);\r\n/**\r\n * Получение задаччи по её ID\r\n * @param {Number} idTask \r\n */\r\nexport const getTask = (idTask) => fetchRequest(`get-task.php?task=ajax&id=${idTask}`);","import React, { Component } from \"react\";\r\nimport { withRouter } from \"react-router-dom\";\r\n\r\nclass SearchByTasks extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n textSearch: props.textSearch || '',\r\n valid: false\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleChangeTextSearch = this._handleChangeTextSearch.bind(this);\r\n this._handleSubmitFormSearch = this._handleSubmitFormSearch.bind(this);\r\n }\r\n\r\n render() {\r\n return (\r\n <form \r\n onSubmit={this._handleSubmitFormSearch}\r\n className=\"form form_search\" method=\"get\">\r\n <h3 className=\"form__title visually-hidden\">Поиск по задачам.</h3>\r\n <div className=\"form__row form__row_search\">\r\n <input className=\"form__input form__input_search\" type=\"search\" name=\"search-field\" placeholder=\"Поиск по задачам\"\r\n value={this.state.textSearch}\r\n onChange={this._handleChangeTextSearch}\r\n />\r\n <button \r\n disabled={!this.state.valid}\r\n className=\"form__button submit\" \r\n type=\"submit\">Найти</button>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _handleChangeTextSearch(evt) {\r\n const value = evt.target.value;\r\n this.setState({\r\n textSearch: value,\r\n valid: Boolean(value.trim())\r\n })\r\n }\r\n\r\n _handleSubmitFormSearch(evt) {\r\n evt.preventDefault();\r\n this.props.history.push(`/search?q=${encodeURIComponent(this.state.textSearch.trim())}`)\r\n }\r\n}\r\n\r\nexport default withRouter(SearchByTasks);\r\n","import React from \"react\";\r\nimport \"./user-menu.scss\"\r\nimport PropTypes from \"prop-types\";\r\nimport { Link } from \"react-router-dom\";\r\nimport { getActiveMenuLinks } from \"../../helpers/helpers\";\r\n\r\nconst UserMenu = (props) => {\r\n const {\r\n user,\r\n url,\r\n handleClickExit\r\n } = props;\r\n\r\n return (\r\n <nav className=\"user-menu\">\r\n <span className=\"user-menu__user-name\">{`${user.surname} ${user.name} ${user.patronymic}`}</span>\r\n {\r\n getActiveMenuLinks(url).map((item, index) => {\r\n return (\r\n <Link\r\n className=\"user-menu__link link\"\r\n key={item.href + index}\r\n to={item.href}\r\n >{item.textLink}</Link>\r\n )\r\n })\r\n }\r\n <Link \r\n className=\"user-menu__link link\"\r\n to=\"/add-task\"\r\n >Поставить задачу</Link>\r\n <a\r\n className=\"user-menu__link user-menu__logout link\"\r\n onClick={handleClickExit}\r\n href=\"/logout\">Выйти</a>\r\n </nav>\r\n )\r\n};\r\n\r\nUserMenu.propTypes = {\r\n url: PropTypes.string.isRequired,\r\n user: PropTypes.shape({\r\n surname: PropTypes.string,\r\n name: PropTypes.string,\r\n patronymic: PropTypes.string\r\n }).isRequired\r\n};\r\n\r\nexport default UserMenu","import React from \"react\";\r\nimport PropTypes from \"prop-types\";\r\nimport \"./task.scss\";\r\nimport {hasDateExpired} from \"../../helpers/helpers\";\r\nimport dompurify from 'dompurify';\r\nimport { Link } from \"react-router-dom\";\r\n\r\nconst sanitizer = dompurify.sanitize;\r\n\r\nconst renderDesc = (isShow, stringAndTags) => {\r\n return isShow ? sanitizer(stringAndTags) : \"\";\r\n}\r\n\r\nconst getTaskContent = (props) => {\r\n const {\r\n isShowDesc,\r\n isMore,\r\n task,\r\n userId\r\n } = props;\r\n const {\r\n task_date_end,\r\n task_title,\r\n task_desc,\r\n task_date_start,\r\n task_status,\r\n task_date_no_limit,\r\n task_id,\r\n author_name,\r\n author_surname,\r\n author_patronymic,\r\n executor_id,\r\n executor_name,\r\n executor_patronymic,\r\n executor_surname\r\n } = task;\r\n \r\n return (\r\n <React.Fragment>\r\n <h3 className=\"task__title\">{task_title}</h3>\r\n <div \r\n className=\"task__desc\"\r\n dangerouslySetInnerHTML={{ __html: renderDesc(isShowDesc, task_desc) }}\r\n >\r\n </div>\r\n <footer className=\"task__footer\">\r\n <div className=\"task__date-start\">Начало задачи: {task_date_start}\r\n </div>\r\n <div className=\"task__date-end\">Закончить задачу до: {Number(task_date_no_limit) === 1 ? 'без даты окончания' : task_date_end}\r\n </div>\r\n <div className=\"task__status\">Статус: {Number(task_status) ? 'Выполнено.': 'В работе.'}\r\n </div>\r\n <div className=\"task__execute\">\r\n {\r\n !Number(task_status) && (userId === Number(executor_id))\r\n ? <button\r\n data-id-task={task_id}\r\n data-title={task_title}\r\n onClick={props.handleClickExecuteTask}\r\n >Выполнить задачу</button>\r\n : \"\"\r\n }\r\n </div>\r\n <div className=\"task__author\">Назначил: {author_surname} {author_name} {author_patronymic}\r\n </div>\r\n <div className=\"task__executor\">Испонитель: {executor_surname} {executor_name} {executor_patronymic}\r\n </div>\r\n </footer>\r\n {\r\n isMore ?\r\n <Link\r\n to={location => ({ ...location, pathname: `/task/${task_id}` })}\r\n className=\"link\"\r\n >Подробнее</Link>\r\n : ''\r\n }\r\n </React.Fragment>\r\n )\r\n}\r\n\r\nexport const Task = (props) => {\r\n const {\r\n isShowDesc,\r\n isTasks,\r\n task\r\n } = props;\r\n const {\r\n task_date_end,\r\n task_date_no_limit\r\n } = task;\r\n\r\n if (isTasks) {\r\n return (\r\n getTaskContent(props)\r\n )\r\n }\r\n\r\n const classTaskExpired = hasDateExpired(task_date_end) && Number(task_date_no_limit) === 0 ? `task_expired` : ``;\r\n\r\n return (\r\n <section className={`task ${classTaskExpired} ${isShowDesc ? `task_single` : ''}`}>\r\n {getTaskContent(props)}\r\n </section>\r\n )\r\n}\r\n\r\nTask.propTypes = {\r\n isShowDesc: PropTypes.bool.isRequired,\r\n isMore: PropTypes.bool.isRequired,\r\n task: PropTypes.shape({\r\n task_date_end: PropTypes.string.isRequired,\r\n task_title: PropTypes.string.isRequired,\r\n task_date_start: PropTypes.string.isRequired,\r\n task_status: PropTypes.string.isRequired,\r\n author_name: PropTypes.string.isRequired,\r\n executor_name: PropTypes.string.isRequired,\r\n task_id: PropTypes.string.isRequired\r\n }).isRequired,\r\n handleClickMore: PropTypes.func\r\n};\r\n\r\nexport default Task\r\n","import React from \"react\";\r\nimport PropTypes from \"prop-types\";\r\nimport Task from \"../task/task\";\r\nimport { hasDateExpired } from \"../../helpers/helpers\";\r\nimport \"./tasks.scss\";\r\n\r\nconst option = {\r\n isMore: true,\r\n isShowDesc: false,\r\n isTasks: true\r\n};\r\n\r\nexport const Tasks = (props) => {\r\n const {\r\n title,\r\n tasks,\r\n userId\r\n } = props;\r\n\r\n return (\r\n <section className=\"tasks\">\r\n <h2 className=\"tasks__title\">{title}</h2>\r\n {\r\n tasks.length ?\r\n <ul className=\"tasks__lists\">\r\n {\r\n tasks.map((task)=> {\r\n const classTaskItem = option.isTasks ? 'task' : '';\r\n const classTaskExpired = hasDateExpired(task.task_date_end) && Number(task.task_date_no_limit) === 0 ? `task_expired` : ``;\r\n\r\n return (\r\n <li\r\n className={`tasks__item ${classTaskItem} ${classTaskExpired}`}\r\n key={task.task_id}>\r\n <Task\r\n isMore={option.isMore}\r\n isShowDesc={option.isShowDesc}\r\n isTasks={option.isTasks}\r\n task={task}\r\n userId={userId}\r\n handleClickMore={props.handleClickMore}\r\n handleClickExecuteTask={props.handleClickExecuteTask}\r\n />\r\n </li>\r\n )\r\n })\r\n }\r\n </ul> :\r\n <div>Нет никаких задач</div>\r\n }\r\n </section>\r\n )\r\n};\r\n\r\nTasks.propTypes = {\r\n title: PropTypes.string.isRequired,\r\n tasks: PropTypes.array.isRequired,\r\n handleClickMore: PropTypes.func\r\n};\r\nexport default Tasks","import React from \"react\";\r\nimport \"./pagination.scss\"\r\n\r\nconst Pagination = (props) => {\r\n const {pagesCount, pageCurrentPagination} = props;\r\n const arr = new Array(pagesCount).fill(pagesCount);\r\n const lastPage = arr.length;\r\n const pagePrev = (pageCurrentPagination - 1) === 0 ? 1 : (pageCurrentPagination - 1);\r\n const pageNext = (pageCurrentPagination + 1) > lastPage ? lastPage : (pageCurrentPagination + 1);\r\n\r\n return (\r\n <ul className=\"pagination-list\">\r\n <li className=\"pagination-list__item pagination-list__item_prev\">\r\n {\r\n pagePrev === pageCurrentPagination?\r\n <a className=\"pagination-list__link\"\r\n onClick={(evt) => evt.preventDefault()}\r\n href=\"#prev\"><</a>\r\n : <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={pagePrev} href={\"page-\" + pagePrev}><</a>\r\n }\r\n </li>\r\n {\r\n arr.map((it, index) => (\r\n <li className={`pagination-list__item${pageCurrentPagination === (index + 1) ?\r\n \" pagination-list__item_active\" \r\n : \"\"}`}\r\n key={\"page-\" + index}>\r\n <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={index + 1} href={\"page-\" + (index + 1)}>{index + 1}</a>\r\n </li>)\r\n )\r\n }\r\n <li className=\"pagination-list__item pagination-list__item_next\">\r\n {\r\n pageNext === pageCurrentPagination ?\r\n <a className=\"pagination-list__link\"\r\n onClick={(evt) => evt.preventDefault()}\r\n href=\"#next\">></a>\r\n : <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={pageNext} href={\"page-\" + pageNext}>></a>\r\n }\r\n </li>\r\n </ul>\r\n )\r\n};\r\n\r\nexport default Pagination","import React from \"react\";\r\nimport \"./loading-data.scss\";\r\n\r\nconst LoadingData = () => {\r\n return (\r\n <div className=\"loader-container\">\r\n <div className=\"loader\">\r\n <div className=\"text\">Загрузка данных</div>\r\n <div className=\"dots\">\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n </div>\r\n </div>\r\n </div>\r\n )\r\n};\r\n\r\nexport default LoadingData","import React, { Component } from \"react\";\r\nimport SearchByTasks from \"../components/search-by-tasks/search-by-tasks\";\r\nimport UserMenu from \"../components/user-menu/user-menu\";\r\nimport Tasks from \"../components/tasks/tasks\";\r\nimport Pagination from \"../components/pagination/pagination\";\r\nimport { getActiveTitleTasks, deleteTaskFromArrTasks, decodeParamsSearchUrl } from \"../helpers/helpers\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport { getMyTasks, getMyTasksDone, getDesignatedTasks, getDesignatedTasksDone, executeTask, getResultSearchText } from \"../data/data\";\r\nimport { TypeMessage, showMessage } from '../plugins/show-message';\r\nimport LoadingData from '../components/loading-data/loading-data';\r\n\r\nclass PageTasks extends Component {\r\n constructor(props){\r\n super(props);\r\n this.initialState = {\r\n tasks: [],\r\n itemsTasks: 9,\r\n pagesCount: 0,\r\n pageCurrentPagination: 1,\r\n loading: true,\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleClickExecuteTask = this._handleClickExecuteTask.bind(this); \r\n this._handleClickChangePagePagination = this._handleClickChangePagePagination.bind(this);\r\n }\r\n\r\n componentDidMount() {\r\n const { url } = this.props;\r\n\r\n if (url === '/search') {\r\n this._getSearchData();\r\n } else {\r\n const dataFunc = this._getFuncData(url);\r\n this._getData(dataFunc);\r\n }\r\n }\r\n\r\n componentDidUpdate(prevProps) {\r\n const { url, urlOrigin } = this.props;\r\n\r\n if ((url !== '/search') && (url !== prevProps.url)) {\r\n const dataFunc = this._getFuncData(url);\r\n this._getData(dataFunc);\r\n }\r\n\r\n if ((url === '/search') && (urlOrigin !== prevProps.urlOrigin)) {\r\n this._getSearchData();\r\n }\r\n }\r\n\r\n render() {\r\n const { isLoggedIn } = this.props;\r\n\r\n if (!isLoggedIn) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n const {\r\n user,\r\n handleClickExit,\r\n url,\r\n urlOrigin\r\n } = this.props;\r\n\r\n const { userId } = user;\r\n\r\n const textSearch = decodeParamsSearchUrl(urlOrigin);\r\n\r\n const {\r\n tasks,\r\n pageCurrentPagination,\r\n itemsTasks,\r\n pagesCount\r\n } = this.state;\r\n const visibleTasks = tasks.length ? tasks.slice((pageCurrentPagination - 1) * itemsTasks, pageCurrentPagination * itemsTasks) : tasks;\r\n\r\n return (\r\n <React.Fragment>\r\n <UserMenu\r\n handleClickExit={handleClickExit}\r\n user={user}\r\n url={url}\r\n />\r\n {\r\n this.state.loading ?\r\n <LoadingData /> :\r\n <React.Fragment>\r\n <SearchByTasks\r\n textSearch={textSearch}\r\n />\r\n <Tasks\r\n tasks={visibleTasks}\r\n title={getActiveTitleTasks(url, textSearch)}\r\n userId={userId}\r\n handleClickExecuteTask={this._handleClickExecuteTask}\r\n />\r\n {\r\n tasks.length > itemsTasks ?\r\n <Pagination\r\n pagesCount={pagesCount}\r\n pageCurrentPagination={pageCurrentPagination}\r\n handleClickChangePagePagination={this._handleClickChangePagePagination}\r\n />\r\n :\r\n null\r\n }\r\n </React.Fragment>\r\n }\r\n </React.Fragment>\r\n )\r\n }\r\n\r\n _getData(fn) {\r\n this.setState({\r\n loading: true,\r\n tasks: this.initialState.tasks,\r\n pageCurrentPagination: this.initialState.pageCurrentPagination\r\n });\r\n\r\n fn()\r\n .then(tasks => {\r\n if (tasks.msgsType === 'error') {\r\n this.setState({\r\n tasks: []\r\n })\r\n return true\r\n }\r\n\r\n const lengthTasks = tasks.length;\r\n\r\n this.setState((state) => {\r\n const { itemsTasks } = state;\r\n\r\n return {\r\n tasks: tasks,\r\n pagesCount: Math.ceil((lengthTasks / itemsTasks))\r\n }\r\n })\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n\r\n _getFuncData(url) {\r\n switch (url) {\r\n case \"/my-tasks-done\":\r\n return getMyTasksDone\r\n case \"/designated-tasks\":\r\n return getDesignatedTasks\r\n case \"/designated-tasks-done\":\r\n return getDesignatedTasksDone\r\n default:\r\n return getMyTasks\r\n }\r\n }\r\n\r\n _handleClickExecuteTask(evt) {\r\n const idTask = evt.target.dataset.idTask;\r\n const title = evt.target.dataset.title;\r\n\r\n const isQuestion = window.confirm(`Вы хотите выполнить задачу - ${title}?`)\r\n\r\n if (isQuestion) {\r\n executeTask(idTask)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState((state) => {\r\n\r\n return {\r\n tasks: deleteTaskFromArrTasks(state.tasks, idTask),\r\n }\r\n })\r\n\r\n return true\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n }\r\n }\r\n\r\n _handleClickChangePagePagination(evt) {\r\n evt.preventDefault();\r\n this.setState({\r\n pageCurrentPagination: +evt.target.dataset.pageIdPag\r\n });\r\n }\r\n\r\n _getSearchData() {\r\n const textSearch = decodeParamsSearchUrl(this.props.urlOrigin) || '';\r\n getResultSearchText(textSearch)\r\n .then(tasks => {\r\n if (tasks.msgsType === 'warning') {\r\n this.setState({\r\n tasks: this.initialState.tasks,\r\n pageCurrentPagination: this.initialState.pageCurrentPagination\r\n })\r\n return true\r\n }\r\n\r\n const lengthTasks = tasks.length;\r\n\r\n this.setState((state) => {\r\n const { itemsTasks } = state;\r\n\r\n return {\r\n tasks: tasks,\r\n pagesCount: Math.ceil((lengthTasks / itemsTasks))\r\n }\r\n })\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n};\r\n\r\nexport default PageTasks","export const ConfMinAndMax = Object.freeze({\r\n MIN_LENGTH_LOGIN: 2,\r\n MAX_LENGTH_LOGIN: 20,\r\n MIN_LENGTH_PASSWORD: 6,\r\n MAX_LENGTH_PASSWORD: 20,\r\n MIN_LENGTH_TEXT: 2,\r\n MAX_LENGTH_TEXT: 20\r\n });\r\nexport const ConfMinAndMaxAddTask = Object.freeze({\r\n MIN_LENGTH_TEXT: 2,\r\n MAX_LENGTH_TEXT_TITLE: 255,\r\n MAX_LENGTH_TEXT_DESK: 255,\r\n });\r\nexport const ConfTimes = Object.freeze({\r\n REDIRECTION_SIGN_IN_TIME: 3000,\r\n REDIRECTION_TASKS_TIME: 3000,\r\n });\r\n","import React, {Component} from \"react\";\r\nimport \"./forms.scss\";\r\nimport {checkLengthMinMaxStr} from \"../../helpers/helpers\";\r\nimport {ConfMinAndMax} from \"../../vars/vars\";\r\nimport {getCookie} from \"../../helpers/helpers\";\r\nimport { signInUser } from \"../../data/data\";\r\nimport { TypeMessage, showMessage } from '../../plugins/show-message';\r\n\r\nimport { Link, withRouter } from \"react-router-dom\";\r\n\r\nclass FormSingIn extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n login: \"\",\r\n password: \"\",\r\n validForm: false\r\n };\r\n this.state = this.initialState;\r\n }\r\n\r\n render() {\r\n return (\r\n <form\r\n onSubmit={this._handleSubmitForm}\r\n className=\"form form_center form_auth\"\r\n method=\"post\">\r\n <h3 className=\"form__title\">Авторизация</h3>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"login\">Ваш логин:</label>\r\n <input\r\n value={this.state.login}\r\n onChange={this._handleLoginChange}\r\n className=\"form__input input\"\r\n id=\"login\" type=\"text\" name=\"login\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_LOGIN}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_LOGIN}\r\n required=\"required\"/>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password\">Пароль:</label>\r\n <input\r\n value={this.state.password}\r\n onChange={this._handlePasswordChange}\r\n className=\"form__input input\"\r\n id=\"password\" type=\"password\" name=\"password\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\"/>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <button\r\n className=\"form__button submit\"\r\n disabled={!this.state.validForm}\r\n type=\"submit\">Войти</button>\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <Link \r\n to=\"/sing-up\"\r\n className=\"form__link-signup link\"\r\n >Зарегистрироваться</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const {login, password} = state;\r\n const isValidLogin = checkLengthMinMaxStr(login, ConfMinAndMax.MIN_LENGTH_LOGIN, ConfMinAndMax.MAX_LENGTH_LOGIN);\r\n const isValidPassword = checkLengthMinMaxStr(password, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n\r\n return isValidLogin && isValidPassword;\r\n };\r\n\r\n _handleLoginChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n login: value,\r\n validForm: this._validateForm(Object.assign({}, state, {login: value}))\r\n }));\r\n };\r\n\r\n _handlePasswordChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password: value,\r\n validForm: this._validateForm(Object.assign({}, state, {password: value}))\r\n }));\r\n };\r\n\r\n _handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n\r\n let formData = new FormData(evt.target);\r\n formData.append('signin', 'ajax');\r\n \r\n signInUser(formData)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState(this.initialState);\r\n\r\n if (getCookie(\"userInfo\") && getCookie(\"PHPSESSID\")) {\r\n this.props.setLoggedIn(true);\r\n this.props.getFullName();\r\n this.props.history.push('/');\r\n }\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n\r\n };\r\n}\r\nexport default withRouter(FormSingIn)","import React from \"react\";\r\nimport FormSingIn from \"../components/forms/form-sing-in\";\r\nimport { Redirect } from \"react-router-dom\";\r\n\r\nconst PageSingIn = ({ \r\n isLoggedIn, \r\n getFullName,\r\n setLoggedIn\r\n }) => {\r\n \r\n if (isLoggedIn) {\r\n return (<Redirect to=\"/\" />)\r\n }\r\n\r\n return (\r\n <FormSingIn\r\n getFullName={getFullName}\r\n setLoggedIn={setLoggedIn}\r\n />\r\n )\r\n};\r\nexport default PageSingIn","import React, { Component } from \"react\";\r\nimport \"./forms.scss\"\r\nimport { checkLengthMinMaxStr } from \"../../helpers/helpers\";\r\nimport { ConfMinAndMax } from \"../../vars/vars\";\r\nimport { showMessage, TypeMessage } from \"../../plugins/show-message\";\r\nimport { signUpUser } from \"../../data/data\";\r\n\r\nimport { Link} from \"react-router-dom\";\r\n\r\nclass FormSingUp extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n login: \"\",\r\n password: \"\",\r\n password2: \"\",\r\n name: \"\",\r\n surname: \"\",\r\n patronymic: \"\",\r\n validForm: false\r\n };\r\n\r\n this.state = this.initialState;\r\n }\r\n\r\n render() { \r\n return (\r\n <form\r\n onSubmit={this._handleSubmitForm}\r\n className=\"form form_center form_reg\"\r\n method=\"post\">\r\n <h3 className=\"form__title\">Регистрация нового пользователя\r\n </h3>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"login\">Ваш логин:</label>\r\n <input\r\n value={this.state.login}\r\n onChange={this._handleLoginChange}\r\n className=\"form__input input\"\r\n id=\"login\" type=\"text\" name=\"login\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_LOGIN}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_LOGIN}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password\">Пароль:</label>\r\n <input\r\n value={this.state.password}\r\n onChange={this._handlePasswordChange}\r\n className=\"form__input input\"\r\n id=\"password\" type=\"password\" name=\"password\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password2\">Повторите пароль:</label>\r\n <input\r\n value={this.state.password2}\r\n onChange={this._handlePassword2Change}\r\n onBlur={this._onBlurInput}\r\n className=\"form__input input\"\r\n id=\"password2\" type=\"password\" name=\"password2\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"name\">Имя:</label>\r\n <input\r\n value={this.state.name}\r\n onChange={this._handleNameChange}\r\n className=\"form__input input\"\r\n id=\"name\" type=\"text\" name=\"name\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"surname\">Фамилия:</label>\r\n <input\r\n value={this.state.surname}\r\n onChange={this._handleSurnameChange}\r\n className=\"form__input input\"\r\n id=\"surname\" type=\"text\" name=\"surname\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"patronymic\">Отчество:</label>\r\n <input\r\n value={this.state.patronymic}\r\n onChange={this.handlePatronymicChange}\r\n className=\"form__input input\"\r\n id=\"patronymic\" type=\"text\" name=\"patronymic\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <button\r\n disabled={!this.state.validForm}\r\n className=\"form__button submit\"\r\n type=\"submit\">Зарегистрироваться</button>\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <Link\r\n to=\"/sing-in\"\r\n className=\"form__link-signup link\"\r\n >Авторизоваться</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const { login, password, password2, name, surname, patronymic } = state;\r\n const isValidLogin = checkLengthMinMaxStr(login, ConfMinAndMax.MIN_LENGTH_LOGIN, ConfMinAndMax.MAX_LENGTH_LOGIN);\r\n const isValidPassword = checkLengthMinMaxStr(password, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n const isValidPassword2 = checkLengthMinMaxStr(password2, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n const isValidEquallyPassword = password === password2;\r\n const isValidName = checkLengthMinMaxStr(name, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n const isValidSurname = checkLengthMinMaxStr(surname, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n const isValidPatronymic = checkLengthMinMaxStr(patronymic, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n\r\n return isValidLogin && isValidPassword && isValidPassword2 && isValidEquallyPassword && isValidName && isValidSurname && isValidPatronymic;\r\n };\r\n\r\n _handleLoginChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n login: value,\r\n validForm: this._validateForm(Object.assign({}, state, { login: value }))\r\n }));\r\n };\r\n\r\n _handlePasswordChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password: value,\r\n validForm: this._validateForm(Object.assign({}, state, { password: value }))\r\n }));\r\n };\r\n\r\n _handlePassword2Change = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password2: value,\r\n validForm: this._validateForm(Object.assign({}, state, { password2: value }))\r\n }));\r\n };\r\n\r\n _handleNameChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n name: value,\r\n validForm: this._validateForm(Object.assign({}, state, { name: value }))\r\n }));\r\n };\r\n\r\n _handleSurnameChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n surname: value,\r\n validForm: this._validateForm(Object.assign({}, state, { surname: value }))\r\n }));\r\n };\r\n\r\n handlePatronymicChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n patronymic: value,\r\n validForm: this._validateForm(Object.assign({}, state, { patronymic: value }))\r\n }));\r\n };\r\n\r\n _handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n\r\n let formData = new FormData(evt.target);\r\n formData.append('signup', 'ajax');\r\n\r\n signUpUser(formData)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState(this.initialState);\r\n\r\n return true\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n };\r\n\r\n _onBlurInput = () => {\r\n const { password, password2 } = this.state;\r\n if (password.length >= ConfMinAndMax.MIN_LENGTH_PASSWORD && password !== password2) {\r\n showMessage(TypeMessage.WARNING, `В поле \"Повторите пароль\", пароль не совпадает с полем \"Пароль\"!`);\r\n }\r\n };\r\n}\r\nexport default FormSingUp","import React from \"react\";\r\nimport FormSingUp from \"../components/forms/form-sing-up\";\r\nimport { Redirect } from \"react-router-dom\";\r\n\r\nconst PageSingUp = ({isLoggedIn}) => {\r\n if (isLoggedIn) {\r\n return (<Redirect to=\"/\" />)\r\n }\r\n \r\n return (\r\n <FormSingUp/>\r\n )\r\n};\r\nexport default PageSingUp","import React, { Component } from \"react\";\r\nimport \"./forms.scss\";\r\n\r\nimport { initFlatpickr, destroyFlatpickr } from \"../../plugins/flatpickr\";\r\nimport { initEditor, destroyEditor } from \"../../plugins/editor\";\r\nimport { checkLengthMinMaxStr } from \"../../helpers/helpers\";\r\nimport { ConfMinAndMaxAddTask } from \"../../vars/vars\";\r\nimport { getAllUsers } from \"../../data/data\";\r\nimport { TypeMessage, showMessage } from '../../plugins/show-message';\r\nimport { addTask } from \"../../data/data\";\r\nimport { clearDataEditor } from \"../../plugins/editor\";\r\nimport { clearDataFlatpickr } from \"../../plugins/flatpickr\";\r\n\r\nimport { Link } from \"react-router-dom\";\r\n\r\nclass FormAddTask extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n selectedDates: \"\",\r\n isCheckedDateNoLimit: false,\r\n valueSelect: \"disabled\",\r\n titleTask: \"\",\r\n descTask: \"\",\r\n validForm: false,\r\n allUsers: []\r\n };\r\n this.state = this.initialState;\r\n\r\n this.inputDatesRef = React.createRef();\r\n this.textareaRef = React.createRef();\r\n }\r\n\r\n componentDidMount() {\r\n initFlatpickr(this.inputDatesRef.current);\r\n initEditor(this.textareaRef.current, this._handleDescTaskChange);\r\n getAllUsers()\r\n .then(allUsers => {\r\n if (allUsers.msgsType === 'error') {\r\n this.setState({\r\n allUsers: []\r\n })\r\n return true\r\n }\r\n\r\n this.setState({\r\n allUsers: allUsers\r\n })\r\n\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n });\r\n }\r\n\r\n componentWillUnmount() {\r\n destroyEditor();\r\n destroyFlatpickr();\r\n }\r\n\r\n render() {\r\n return (\r\n <form\r\n onSubmit={this.handleSubmitForm}\r\n className=\"form form_task-add\"\r\n action=\"\" method=\"post\">\r\n <div className=\"form__row form__row_label-group-two\">\r\n <label htmlFor=\"date\">Дата начала и окончания задачи</label>\r\n <div\r\n ref={this.inputDatesRef}\r\n className=\"flatpickr\">\r\n <input\r\n className=\"form__date input\"\r\n onInput={this._handleDatesChange}\r\n id=\"date\" type=\"text\" name=\"date\"\r\n placeholder=\"выберите дату или даты\" data-input=\"data-input\" required=\"required\" />\r\n <button type=\"button\" title=\"Открыт/Закрыть календарь\" data-toggle=\"\">календарь</button>\r\n <button type=\"button\" title=\"Очистить календарь\" data-clear=\"\">очистить</button>\r\n </div>\r\n </div>\r\n <div className=\"form__row\">\r\n <input\r\n className=\"form__checkbox\"\r\n onChange={this._handleDateNoLimitChange}\r\n checked={this.state.isCheckedDateNoLimit}\r\n type=\"checkbox\" name=\"date-no-limit\" id=\"date-no-limit\" />\r\n <label htmlFor=\"date-no-limit\">Без даты окончания (дата окончания выбранная выше, будет игнорирована)</label>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <span>Выберите исполнителя</span>\r\n <select\r\n value={this.state.valueSelect}\r\n onChange={this._handleSelectChange}\r\n className=\"form__select\" name=\"executor\" required=\"required\">\r\n <option value=\"disabled\" disabled=\"disabled\">Не выбрано</option>\r\n {\r\n this.state.allUsers.map(user => (\r\n <option\r\n value={user.user_id}\r\n key={user.user_id}\r\n >{user.user_surname} {user.user_name} {user.user_patronymic}</option>\r\n ))\r\n }\r\n </select>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label>Загаловок задачи</label>\r\n <textarea\r\n value={this.state.titleTask}\r\n onChange={this._handleTitleTaskChange}\r\n className=\"form__title-add textarea\" type=\"date\" name=\"title\" maxLength=\"255\" placeholder=\"сделать ...\" required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label>Дополнительная информация по задаче</label>\r\n <textarea\r\n className=\"textarea\"\r\n ref={this.textareaRef}\r\n value={this.state.descTask}\r\n onChange={this._handleDescTaskChange}\r\n id=\"textarea-text\" name=\"text\" maxLength=\"1000\" placeholder=\"Обьяснение задачи ...\" required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <button\r\n disabled={!this.state.validForm}\r\n className=\"form__submit submit\"\r\n type=\"submit\">Добавить задачу</button>\r\n <Link\r\n className=\"form__link link\"\r\n to=\"/\"\r\n >К списку моих задач</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const { selectedDates, valueSelect, titleTask, descTask } = state;\r\n const isValidValueSelect = valueSelect !== \"disabled\";\r\n const isValidTitleTask = checkLengthMinMaxStr(titleTask, ConfMinAndMaxAddTask.MIN_LENGTH_TEXT, ConfMinAndMaxAddTask.MAX_LENGTH_TEXT_TITLE);\r\n const isValidDescTask = checkLengthMinMaxStr(descTask, ConfMinAndMaxAddTask.MIN_LENGTH_TEXT, ConfMinAndMaxAddTask.MAX_LENGTH_TEXT_DESK);\r\n\r\n return selectedDates && isValidValueSelect && isValidTitleTask && isValidDescTask;\r\n };\r\n\r\n _handleDatesChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n selectedDates: value,\r\n validForm: this._validateForm(Object.assign(state, { selectedDates: value }))\r\n }));\r\n };\r\n\r\n _handleDateNoLimitChange = () => {\r\n this.setState((state) => ({\r\n isCheckedDateNoLimit: !state.isCheckedDateNoLimit\r\n }));\r\n };\r\n\r\n _handleTitleTaskChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n titleTask: value,\r\n validForm: this._validateForm(Object.assign(state, { titleTask: value }))\r\n }));\r\n };\r\n\r\n _handleDescTaskChange = (data) => {\r\n this.setState((state) => ({\r\n descTask: data,\r\n validForm: this._validateForm(Object.assign(state, { descTask: data }))\r\n }));\r\n };\r\n\r\n _handleSelectChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n valueSelect: value,\r\n validForm: this._validateForm(Object.assign(state, { valueSelect: value }))\r\n }));\r\n };\r\n\r\n handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n let FORM_DATA = new FormData(evt.target);\r\n FORM_DATA.append('add-task', 'ajax');\r\n\r\n addTask(FORM_DATA)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState({\r\n isCheckedDateNoLimit: false,\r\n valueSelect: \"disabled\",\r\n titleTask: \"\",\r\n validForm: false,\r\n })\r\n\r\n clearDataEditor();\r\n clearDataFlatpickr();\r\n\r\n return true\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n };\r\n\r\n _handleClick = (evt) => {\r\n evt.preventDefault();\r\n this.props.changeActivePage(\"screen-tasks\");\r\n };\r\n}\r\n\r\nexport default FormAddTask","import React from \"react\";\r\nimport FormAddTask from \"../components/forms/form-add-task\";\r\n\r\nimport { Redirect } from \"react-router-dom\";\r\n\r\nconst PageAddTask = (props) => {\r\n const { isLoggedIn } = props;\r\n\r\n if (!isLoggedIn) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n return (\r\n <FormAddTask />\r\n )\r\n};\r\nexport default PageAddTask","import React, { Component } from \"react\";\r\nimport Task from \"../components/task/task\"\r\nimport UserMenu from \"../components/user-menu/user-menu\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport LoadingData from '../components/loading-data/loading-data';\r\nimport { getTask, executeTask } from \"../data/data\";\r\nimport { TypeMessage, showMessage } from '../plugins/show-message';\r\nimport { changeStatusTask } from \"../helpers/helpers\";\r\n\r\nconst option = {\r\n isMore: false,\r\n isShowDesc: true\r\n};\r\n\r\nclass PageTask extends Component {\r\n constructor(props){\r\n super(props);\r\n this.initialState = {\r\n task: null,\r\n loading: true\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleClickExecuteTask = this._handleClickExecuteTask.bind(this); \r\n }\r\n\r\n componentDidMount() {\r\n const idTask = this.props.idTask;\r\n \r\n getTask(idTask)\r\n .then(task => {\r\n if (task.msgsType === 'error') {\r\n this.setState({\r\n task: this.initialState.task\r\n })\r\n return true;\r\n }\r\n \r\n this.setState({task});\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n\r\n render() {\r\n const { isLoggedIn } = this.props;\r\n\r\n if (!isLoggedIn) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n const {\r\n user,\r\n handleClickExit,\r\n url,\r\n } = this.props;\r\n\r\n const {userId} = user;\r\n\r\n return (\r\n <React.Fragment>\r\n <UserMenu\r\n handleClickExit={handleClickExit}\r\n user={user}\r\n url={url}\r\n />\r\n {\r\n this.state.loading ?\r\n <LoadingData /> :\r\n this.state.task ?\r\n <Task\r\n isMore={option.isMore}\r\n isShowDesc={option.isShowDesc}\r\n task={this.state.task}\r\n userId={userId}\r\n handleClickExecuteTask={this._handleClickExecuteTask}\r\n /> :\r\n <p>Такая задача не существует!</p>\r\n }\r\n </React.Fragment>\r\n )\r\n }\r\n\r\n _handleClickExecuteTask(evt) {\r\n const idTask = evt.target.dataset.idTask;\r\n const title = evt.target.dataset.title;\r\n\r\n const isQuestion = window.confirm(`Вы хотите выполнить задачу - ${title}?`)\r\n\r\n if (isQuestion) {\r\n executeTask(idTask)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState((state) => (\r\n {\r\n task: changeStatusTask(state.task),\r\n }\r\n ))\r\n\r\n return true\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n }\r\n }\r\n};\r\n\r\nexport default PageTask\r\n","import React, {PureComponent} from 'react';\nimport Container from \"./components/container/container\";\nimport Footer from './components/footer/footer';\nimport { TypeMessage, showMessage } from './plugins/show-message';\nimport { getCookie, deleteCookie } from \"./helpers/helpers\";\nimport { logOut } from \"./data/data\";\n\nimport { BrowserRouter as Router, Route, Switch } from 'react-router-dom';\nimport PageTasks from './pages/page-tasks';\nimport PageSingIn from './pages/page-sign-in';\nimport PageSingUp from './pages/page-sign-up';\nimport PageAddTask from \"./pages/page-add-task\";\nimport PageTask from \"./pages/page-task\";\n\nimport 'normalize.css';\n\nrequire('./Common.scss');\n\nexport class App extends PureComponent {\n constructor(props) {\n super(props);\n\n this.initialState = {\n user: {\n name: '',\n surname: '',\n patronymic: '',\n userId: null\n },\n textSearch: '',\n isLoggedIn: Boolean(this._isAuthUser())\n };\n\n this.state = this.initialState;\n\n this._getFullName = this._getFullName.bind(this);\n this._setLoggedIn = this._setLoggedIn.bind(this);\n this._handleClickExit = this._handleClickExit.bind(this);\n }\n\n componentDidMount() {\n this._getFullName();\n }\n\n render() {\n const { \n isLoggedIn,\n user\n } = this.state;\n\n return (\n <Router basename=\"/react/\" >\n <main className={`bg main${this.state.loading ? ' flex' : ''}`}>\n <Container>\n <Switch>\n <Route \n path=\"/\"\n render={this.renderPageTasks}\n exact />\n <Route \n path=\"/search\"\n render={this.renderPageTasks}\n />\n <Route \n path=\"/my-tasks-done\"\n render={this.renderPageTasks}\n />\n <Route \n path=\"/designated-tasks\"\n render={this.renderPageTasks}\n />\n <Route \n path=\"/designated-tasks-done\"\n render={this.renderPageTasks}\n />\n <Route \n path=\"/sing-up\"\n render={()=>(\n <PageSingUp \n isLoggedIn={isLoggedIn}\n />\n )} />\n <Route \n path=\"/sing-in\"\n render={() => (\n <PageSingIn\n isLoggedIn={isLoggedIn}\n getFullName={this._getFullName}\n setLoggedIn={this._setLoggedIn}\n />\n )} />\n <Route \n path=\"/add-task\"\n render={()=>(\n <PageAddTask \n isLoggedIn={isLoggedIn}\n />\n )}\n />\n <Route \n path=\"/task/:id\"\n render={({ match })=> {\n const { id } = match.params;\n\n return <PageTask\n user={user}\n url={match.url}\n idTask={id}\n handleClickExit={this._handleClickExit}\n isLoggedIn={isLoggedIn}\n />\n }\n }\n />\n <Route render={()=>(<h1>Такой страницы нету!</h1>)} />\n </Switch>\n </Container>\n </main>\n <Footer />\n </Router>\n )\n }\n\n renderPageTasks = ({ location, match }) => {\n return <PageTasks\n isLoggedIn={this.state.isLoggedIn}\n user={this.state.user}\n url={match.url}\n urlOrigin={`${window.location.origin}${location.search}`}\n handleClickExit={this._handleClickExit}\n />;\n }\n\n _isAuthUser() {\n return getCookie(\"userInfo\") && getCookie(\"PHPSESSID\");\n }\n\n _getFullName() {\n if (this._isAuthUser()) {\n const userInfo = getCookie(\"userInfo\").split(\";\");\n this.setState({\n user: {\n name: userInfo[0],\n surname: userInfo[1],\n patronymic: userInfo[2],\n userId: Number(userInfo[3])\n }\n });\n }\n }\n\n _setLoggedIn(value = false) {\n this.setState({ isLoggedIn: value })\n }\n\n _handleClickExit(evt) {\n evt.preventDefault();\n const isQuestion = window.confirm(`Вы действительно хотите выйти?`);\n if (isQuestion) {\n logOut()\n .then(response => {\n showMessage(response.msgsType, '', response.textMsgs);\n if (response.msgsType === 'success') {\n deleteCookie('PHPSESSID');\n deleteCookie('userInfo');\n this._setLoggedIn(false);\n }\n return true;\n })\n .catch(e => {\n console.error(e);\n showMessage(TypeMessage.ERROR, e, );\n });\n }\n }\n}\n\nexport default App;","// This optional code is used to register a service worker.\n// register() is not called by default.\n\n// This lets the app load faster on subsequent visits in production, and gives\n// it offline capabilities. However, it also means that developers (and users)\n// will only see deployed updates on subsequent visits to a page, after all the\n// existing tabs open on the page have been closed, since previously cached\n// resources are updated in the background.\n\n// To learn more about the benefits of this model and instructions on how to\n// opt-in, read https://bit.ly/CRA-PWA\n\nconst isLocalhost = Boolean(\n window.location.hostname === 'localhost' ||\n // [::1] is the IPv6 localhost address.\n window.location.hostname === '[::1]' ||\n // 127.0.0.0/8 are considered localhost for IPv4.\n window.location.hostname.match(\n /^127(?:\\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/\n )\n);\n\nexport function register(config) {\n if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {\n // The URL constructor is available in all browsers that support SW.\n const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);\n if (publicUrl.origin !== window.location.origin) {\n // Our service worker won't work if PUBLIC_URL is on a different origin\n // from what our page is served on. This might happen if a CDN is used to\n // serve assets; see https://github.com/facebook/create-react-app/issues/2374\n return;\n }\n\n window.addEventListener('load', () => {\n const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;\n\n if (isLocalhost) {\n // This is running on localhost. Let's check if a service worker still exists or not.\n checkValidServiceWorker(swUrl, config);\n\n // Add some additional logging to localhost, pointing developers to the\n // service worker/PWA documentation.\n navigator.serviceWorker.ready.then(() => {\n console.log(\n 'This web app is being served cache-first by a service ' +\n 'worker. To learn more, visit https://bit.ly/CRA-PWA'\n );\n });\n } else {\n // Is not localhost. Just register service worker\n registerValidSW(swUrl, config);\n }\n });\n }\n}\n\nfunction registerValidSW(swUrl, config) {\n navigator.serviceWorker\n .register(swUrl)\n .then(registration => {\n registration.onupdatefound = () => {\n const installingWorker = registration.installing;\n if (installingWorker == null) {\n return;\n }\n installingWorker.onstatechange = () => {\n if (installingWorker.state === 'installed') {\n if (navigator.serviceWorker.controller) {\n // At this point, the updated precached content has been fetched,\n // but the previous service worker will still serve the older\n // content until all client tabs are closed.\n console.log(\n 'New content is available and will be used when all ' +\n 'tabs for this page are closed. See https://bit.ly/CRA-PWA.'\n );\n\n // Execute callback\n if (config && config.onUpdate) {\n config.onUpdate(registration);\n }\n } else {\n // At this point, everything has been precached.\n // It's the perfect time to display a\n // \"Content is cached for offline use.\" message.\n console.log('Content is cached for offline use.');\n\n // Execute callback\n if (config && config.onSuccess) {\n config.onSuccess(registration);\n }\n }\n }\n };\n };\n })\n .catch(error => {\n console.error('Error during service worker registration:', error);\n });\n}\n\nfunction checkValidServiceWorker(swUrl, config) {\n // Check if the service worker can be found. If it can't reload the page.\n fetch(swUrl, {\n headers: { 'Service-Worker': 'script' }\n })\n .then(response => {\n // Ensure service worker exists, and that we really are getting a JS file.\n const contentType = response.headers.get('content-type');\n if (\n response.status === 404 ||\n (contentType != null && contentType.indexOf('javascript') === -1)\n ) {\n // No service worker found. Probably a different app. Reload the page.\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister().then(() => {\n window.location.reload();\n });\n });\n } else {\n // Service worker found. Proceed as normal.\n registerValidSW(swUrl, config);\n }\n })\n .catch(() => {\n console.log(\n 'No internet connection found. App is running in offline mode.'\n );\n });\n}\n\nexport function unregister() {\n if ('serviceWorker' in navigator) {\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister();\n });\n }\n}\n","import React from 'react';\nimport ReactDOM from 'react-dom';\nimport './index.css';\nimport App from './App';\nimport * as serviceWorker from './serviceWorker';\n\nReactDOM.render(<App />, document.querySelector('.root'));\n\n// If you want your app to work offline and load faster, you can change\n// unregister() to register() below. Note this comes with some pitfalls.\n// Learn more about service workers: https://bit.ly/CRA-PWA\nserviceWorker.unregister();\n"],"sourceRoot":""} \ No newline at end of file diff --git a/php/react/static/js/main.b0b97791.chunk.js b/php/react/static/js/main.b0b97791.chunk.js new file mode 100644 index 0000000..f162ac0 --- /dev/null +++ b/php/react/static/js/main.b0b97791.chunk.js @@ -0,0 +1,2 @@ +(this["webpackJsonpspa-react"]=this["webpackJsonpspa-react"]||[]).push([[0],{25:function(e,t,a){},43:function(e,t,a){e.exports=a(84)},52:function(e,t,a){},53:function(e,t,a){},55:function(e,t,a){},59:function(e,t,a){},60:function(e,t,a){},61:function(e,t,a){},62:function(e,t,a){},83:function(e,t,a){},84:function(e,t,a){"use strict";a.r(t);var n=a(0),r=a.n(n),s=a(20),i=a.n(s),o=a(13),c=a(7),l=a(36),u={name:"",surname:"",patronymic:"",userId:0},m=function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:u,t=arguments.length>1?arguments[1]:void 0;switch(t.type){case"GET_USER_INFO":return t.payload;default:return e}},d=a(42),h=a(24),_=function(e,t,a){return e.length>=t&&e.length<=a},p=function(e){var t=(new Date).getTime();return new Date(E(e)).getTime()<t},g=function(e){var t=document.cookie.match(new RegExp("(?:^|; )"+e.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g,"\\$1")+"=([^;]*)"));return t?decodeURIComponent(t[1]):void 0};var f=function(e){!function(e,t){var a=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{};(a=Object(h.a)({path:"/"},a)).expires instanceof Date&&(a.expires=a.expires.toUTCString());var n=encodeURIComponent(e)+"="+encodeURIComponent(t);for(var r in a){n+="; "+r;var s=a[r];!0!==s&&(n+="="+s)}document.cookie=n}(e,"",{"max-age":-1})},E=function(e){return e.split(".").reverse().join("-")},k=function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"";switch(e){case"/my-tasks-done":return"\u041c\u043e\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u044b\u0435 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t=e.target.value;a.setState((function(e){return{name:t,validForm:a._validateForm(Object.assign({},e,{name:t}))}}))},a._handleSurnameChange=function(e){var t=e.target.value;a.setState((function(e){return{surname:t,validForm:a._validateForm(Object.assign({},e,{surname:t}))}}))},a.handlePatronymicChange=function(e){var t=e.target.value;a.setState((function(e){return{patronymic:t,validForm:a._validateForm(Object.assign({},e,{patronymic:t}))}}))},a._handleSubmitForm=function(e){e.preventDefault();var t=new FormData(e.target);t.append("signup","ajax"),J(t).then((function(e){if(te(e.msgsType,"",e.textMsgs),"success"===e.msgsType)return a.setState(a.initialState),!0})).catch((function(e){console.error(e),te(ae.ERROR,e,"\u041f\u0440\u043e\u0438\u0437\u043e\u0448\u043b\u0430 \u043e\u0448\u0438\u0431\u043a\u0430.")}))},a._onBlurInput=function(){var e=a.state,t=e.password,n=e.password2;t.length>=ge.MIN_LENGTH_PASSWORD&&t!==n&&te(ae.WARNING,'\u0412 \u043f\u043e\u043b\u0435 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initialState = {\r\n name: '',\r\n surname: '',\r\n patronymic: '',\r\n userId: 0\r\n}\r\n\r\nconst reducerUser = (state = initialState, action ) => {\r\n switch (action.type) {\r\n case 'GET_USER_INFO':\r\n return action.payload;\r\n default:\r\n return state;\r\n }\r\n}\r\n\r\nexport default reducerUser;\r\n","/**\r\n * Функция для проверки длины строки, в промежутке - >= && <=\r\n * @param str\r\n * @param minLengthStr\r\n * @param maxLengthStr\r\n * @returns {boolean|boolean}\r\n */\r\nexport const checkLengthMinMaxStr = (str, minLengthStr, maxLengthStr) => {\r\n return (str.length >= minLengthStr) && (str.length <= maxLengthStr);\r\n};\r\n/**\r\n * Истекла ли задача\r\n * @param dateTask - дата задачи.\r\n * @returns {boolean}\r\n */\r\nexport const hasDateExpired = (dateTask) => {\r\n const today = new Date().getTime();\r\n const dateEnd = new Date(reverseDate(dateTask)).getTime();\r\n\r\n return dateEnd < today;\r\n};\r\n/**\r\n * Получение Cookie по имени\r\n * @param name - имя Cookie\r\n * @returns {any}\r\n */\r\nexport const getCookie = (name) => {\r\n let matches = document.cookie.match(new RegExp(\r\n // eslint-disable-next-line no-useless-escape\r\n \"(?:^|; )\" + name.replace(/([\\.$?*|{}\\(\\)\\[\\]\\\\\\/\\+^])/g, '\\\\$1') + \"=([^;]*)\"\r\n ));\r\n return matches ? decodeURIComponent(matches[1]) : undefined;\r\n};\r\n/**\r\n * Устанавливает куки с именем name и значением value c опциями.\r\n * @param {String} name\r\n * @param {String} value\r\n * @param {Object} options\r\n */\r\nfunction setCookie(name, value, options = {}) {\r\n options = {\r\n path: '/',\r\n ...options\r\n };\r\n\r\n if (options.expires instanceof Date) {\r\n options.expires = options.expires.toUTCString();\r\n }\r\n\r\n let updatedCookie = encodeURIComponent(name) + \"=\" + encodeURIComponent(value);\r\n\r\n for (let optionKey in options) {\r\n updatedCookie += \"; \" + optionKey;\r\n let optionValue = options[optionKey];\r\n if (optionValue !== true) {\r\n updatedCookie += \"=\" + optionValue;\r\n }\r\n }\r\n\r\n document.cookie = updatedCookie;\r\n}\r\n/**\r\n * Уддаление Cookie по её имени.\r\n * @param {String} name\r\n */\r\nexport const deleteCookie = (name) => {\r\n setCookie(name, \"\", {\r\n 'max-age': -1\r\n })\r\n}\r\n/**\r\n * Переворачивает дату с сервера для js\r\n * @param {String} date\r\n */\r\nexport const reverseDate = (date) => {\r\n return date.split('.').reverse().join('-');\r\n}\r\n/**\r\n * Возврашает заголовок для задач в зависимомти от активного скрина.\r\n * @param {String} url\r\n * @param {String} textSearch\r\n */\r\nexport const getActiveTitleTasks = (url, textSearch=\"\") => {\r\n switch (url) {\r\n case \"/my-tasks-done\":\r\n return \"Мои выполненые задачи.\";\r\n case \"/designated-tasks\":\r\n return \"Я назначил задачи.\";\r\n case \"/designated-tasks-done\":\r\n return \"Выполненные задачи другими.\";\r\n case \"/search\":\r\n return `Результаты поиска по запросу - \"${textSearch}\"`;\r\n default:\r\n return \"Мои задачи.\";\r\n }\r\n}\r\n/**\r\n * Удаление задачи. Для страниц с задачами.\r\n * @param {Object} tasks\r\n * @param {Number} idTask\r\n */\r\nexport const deleteTaskFromArrTasks = (tasks, idTask) => {\r\n let copyTasks = [...tasks];\r\n const indexTask = copyTasks.findIndex((task) => Number(task.task_id) === Number(idTask));\r\n if (indexTask !== -1) {\r\n // copyTasks[indexTask][\"task_status\"] = \"1\";\r\n copyTasks.splice(indexTask, 1);\r\n }\r\n\r\n return copyTasks;\r\n}\r\n/**\r\n * Изменение статуса задачи для страницы задач.\r\n * @param {Object} task\r\n */\r\nexport const changeStatusTask = (task) => {\r\n return Object.assign({}, task, { task_status: \"1\" });\r\n}\r\n/**\r\n * Получение массива активных(изменяемых в зависимости от типа адреса) ссылок для меню.\r\n * @param {String} url\r\n */\r\nexport const getActiveMenuLinks = (url) => {\r\n switch (url) {\r\n case \"/\":\r\n return [\r\n { textLink: \"Выполненые задачи мною\", href: \"/my-tasks-done\" },\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n case \"/my-tasks-done\":\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n case \"/designated-tasks\":\r\n return [\r\n { textLink: \"Выполненые задачи другими\", href: \"/designated-tasks-done\" },\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n ]\r\n case \"/designated-tasks-done\":\r\n return [\r\n { textLink: \"Выполненые задачи другими\", href: \"/designated-tasks-done\" },\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n ]\r\n case \"/search\":\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\"},\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n default:\r\n return [\r\n { textLink: \"Мои задачи\", href: \"/\" },\r\n { textLink: \"Я назначил задачи\", href: \"/designated-tasks\" },\r\n ]\r\n }\r\n}\r\n/**\r\n * Декадирование параметра поиска\r\n * @param {String} urlOrigin\r\n */\r\nexport const decodeParamsSearchUrl = (urlOrigin) => {\r\n if (!urlOrigin) {\r\n return '';\r\n }\r\n const url = new URL(urlOrigin);\r\n if (url.searchParams.has('q')) {\r\n const searchTextEncode = url.searchParams.get('q');\r\n return decodeURIComponent(searchTextEncode);\r\n }\r\n}\r\n/*\r\n* Проверяет залогинился ли пользователь\r\n* */\r\nexport const checkLoggedUser = ()=> (getCookie(\"userInfo\") && getCookie(\"PHPSESSID\"));\r\n","import { changeStatusTask } from \"../helpers/helpers\";\r\n\r\nconst reducerTask = (state = null, action ) => {\r\n switch (action.type) {\r\n case 'FETCH_TASK':\r\n return action.payload;\r\n case 'EXECUTE_TASK':\r\n return changeStatusTask(action.payload);\r\n default:\r\n return state;\r\n }\r\n}\r\n\r\nexport default reducerTask;\r\n","const reducerUsers = (state = [], action ) => {\r\n switch (action.type) {\r\n case 'GET_ALL_USERS':\r\n return action.payload;\r\n default:\r\n return state;\r\n }\r\n}\r\n\r\nexport default reducerUsers;\r\n","const reducerTasks = (state = [], action ) => {\r\n switch (action.type) {\r\n case 'GET_TASKS':\r\n return action.payload;\r\n default:\r\n return state;\r\n }\r\n}\r\n\r\nexport default reducerTasks;\r\n","import { combineReducers } from 'redux';\r\nimport user from \"./user\";\r\nimport task from \"./task\";\r\nimport users from \"./users\";\r\nimport tasks from \"./tasks\";\r\n\r\n\r\n\r\nexport default combineReducers({\r\n user,\r\n task,\r\n users,\r\n tasks\r\n})\r\n","import React from \"react\";\r\n\r\nexport default function Container(props) {\r\n return (\r\n <div className=\"container\">{props.children}</div>\r\n )\r\n}","import React from \"react\";\r\nimport Container from \"../container/container\";\r\nimport './footer.scss'\r\n\r\nexport default function Footer() {\r\n return (<footer className=\"footer\">\r\n <Container>\r\n <p>Разработка Дмитриев Максим. © 2019 г.</p>\r\n </Container>\r\n </footer>);\r\n}\r\n","export const getUserInfo = (payload) => ({ type: 'GET_USER_INFO', payload });\r\n","import React, { Component } from \"react\";\r\nimport { withRouter } from \"react-router-dom\";\r\n\r\nclass SearchByTasks extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n textSearch: props.textSearch || '',\r\n valid: false\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleChangeTextSearch = this._handleChangeTextSearch.bind(this);\r\n this._handleSubmitFormSearch = this._handleSubmitFormSearch.bind(this);\r\n }\r\n\r\n render() {\r\n return (\r\n <form \r\n onSubmit={this._handleSubmitFormSearch}\r\n className=\"form form_search\" method=\"get\">\r\n <h3 className=\"form__title visually-hidden\">Поиск по задачам.</h3>\r\n <div className=\"form__row form__row_search\">\r\n <input className=\"form__input form__input_search\" type=\"search\" name=\"search-field\" placeholder=\"Поиск по задачам\"\r\n value={this.state.textSearch}\r\n onChange={this._handleChangeTextSearch}\r\n />\r\n <button \r\n disabled={!this.state.valid}\r\n className=\"form__button submit\" \r\n type=\"submit\">Найти</button>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _handleChangeTextSearch(evt) {\r\n const value = evt.target.value;\r\n this.setState({\r\n textSearch: value,\r\n valid: Boolean(value.trim())\r\n })\r\n }\r\n\r\n _handleSubmitFormSearch(evt) {\r\n evt.preventDefault();\r\n this.props.history.push(`/search?q=${encodeURIComponent(this.state.textSearch.trim())}`)\r\n }\r\n}\r\n\r\nexport default withRouter(SearchByTasks);\r\n","/**\r\n * Получение моих задач\r\n */\r\nexport const fetchRequest = async (\r\n link,\r\n params = {\r\n method: 'GET',\r\n cache: 'no-store'\r\n }\r\n ) => {\r\n\r\n const response = await fetch(`/ajax/${link}`, params);\r\n\r\n return await response.json();\r\n};\r\n/**\r\n * Получение моих задач\r\n */\r\nexport const getMyTasks = () => fetchRequest('get-my-tasks.php?my-tasks=ajax');\r\n/**\r\n * Получение моих выполненых задач\r\n */\r\nexport const getMyTasksDone = () => fetchRequest('get-my-tasks-done.php?my-tasks-done=ajax');\r\n/**\r\n * Получение задач поставленных мною\r\n */\r\nexport const getDesignatedTasks = () => fetchRequest('get-designated-tasks.php?get-designated-task=ajax');\r\n/**\r\n * Выполненные задачи другими\r\n */\r\nexport const getDesignatedTasksDone = () => fetchRequest('get-designated-tasks-done.php?get-designated-task-done=ajax');\r\n/**\r\n * Получение всех ользователей\r\n */\r\nexport const getAllUsers = () => fetchRequest('get-all-users.php?all-users=ajax');\r\n/**\r\n * Выполнение задачи\r\n */\r\nexport const executeTask = (idTask) => fetchRequest(`execute-task.php?execute-task=ajax&action=execute&id=${idTask}`);\r\n/**\r\n * Добавление заддачи\r\n * @param {Object} formData \r\n */\r\nexport const addTask = (formData) => fetchRequest(\r\n `add-task.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Регистрация пользователя на сайте.\r\n * @param {Object} formData\r\n */\r\nexport const signUpUser = (formData) => fetchRequest(\r\n `signup.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Авторизация пользователя на сайте.\r\n * @param {Object} formData\r\n */\r\nexport const signInUser = (formData) => fetchRequest(\r\n `signin.php`,\r\n {\r\n method: 'POST',\r\n body: formData\r\n }\r\n );\r\n/**\r\n * Выход с сайта.\r\n */\r\nexport const logOut = () => fetchRequest(`logout.php?logout=ajax&action=exit`);\r\n/**\r\n * Поиск задачи\r\n * @param {String} text \r\n */\r\nexport const getResultSearchText = (text) => fetchRequest(`get-result-search.php?search-field=${text}`);\r\n/**\r\n * Получение задаччи по её ID\r\n * @param {Number} idTask \r\n */\r\nexport const getTask = (idTask) => fetchRequest(`get-task.php?task=ajax&id=${idTask}`);","import toastr from 'toastr';\r\n\r\ntoastr.options = {\r\n closeButton: false,\r\n debug: false,\r\n newestOnTop: false,\r\n progressBar: true,\r\n positionClass: `toast-top-center`,\r\n onclick: null,\r\n showDuration: `300`,\r\n hideDuration: `1000`,\r\n extendedTimeOut: `1000`,\r\n showEasing: `swing`,\r\n hideEasing: `linear`,\r\n showMethod: `fadeIn`,\r\n hideMethod: `fadeOut`\r\n};\r\n/**\r\n * Сообщение для пользователя\r\n * @param {String} type (`info`, `success`, `warning`, `error`)\r\n * @param {String} message `text`\r\n * @param {String} title `text`\r\n * @param {Number} time\r\n */\r\nconst showMessage = (type, message, title = ``, options = { time: 5000, preventDuplicates: false }) => {\r\n toastr.options.timeOut = options.time;\r\n toastr.options.preventDuplicates = options.preventDuplicates;\r\n if (title) {\r\n toastr[type](message, title)\r\n } else {\r\n toastr[type](message)\r\n }\r\n};\r\n/**\r\n * Типы сообщений для функции showMessage\r\n */\r\nconst TypeMessage = {\r\n INFO: `info`,\r\n SUCCESS: `success`,\r\n WARNING: `warning`,\r\n ERROR: `error`\r\n};\r\n\r\nexport { showMessage, TypeMessage }\r\n","import flatpickr from 'flatpickr';\r\nimport { Russian } from 'flatpickr/dist/l10n/ru';\r\n\r\nconst CONFIG_FLATPICKR = {\r\n locale: Russian,\r\n defaultDate: `today`,\r\n mode: `range`,\r\n dateFormat: `d.m.Y`,\r\n minDate: `today`,\r\n weekNumbers: true,\r\n wrap: true\r\n};\r\nlet fp;\r\n\r\n/**\r\n * Иницилизация flatpickr\r\n * @param elem\r\n */\r\nexport const initFlatpickr = (elem) => {\r\n fp = flatpickr(elem, CONFIG_FLATPICKR);\r\n fp.setDate(+new Date(), true, CONFIG_FLATPICKR.dateFormat);\r\n};\r\n/**\r\n * Размонтирование flatpickr\r\n */\r\nexport const destroyFlatpickr = () => {\r\n fp.destroy();\r\n}\r\n/**\r\n * Очишает данные в flatpickr и устанавливает текушую дату\r\n */\r\nexport const clearDataFlatpickr = () => {\r\n fp.clear();\r\n fp.setDate(+new Date(), true, CONFIG_FLATPICKR.dateFormat);\r\n};\r\n","import ClassicEditor from '@ckeditor/ckeditor5-build-classic';\r\nimport '@ckeditor/ckeditor5-build-classic/build/translations/ru';\r\n// import { showMessage, TypeMessage } from './show-user-message';\r\n\r\nconst CONFIG = {\r\n removePlugins: ['ImageUpload'],\r\n toolbar: ['Heading', 'bold', 'italic', '|', 'Link', 'bulletedList', 'numberedList', 'blockQuote', 'MediaEmbed', 'Undo', 'Redo'],\r\n language: 'ru',\r\n mediaEmbed: {\r\n previewsInData: true\r\n }\r\n};\r\nlet editor;\r\n/**\r\n * Инициализация ckeditor5\r\n * @param elem\r\n * @param fn - функция получения данных из редактора.\r\n */\r\nexport const initEditor = (elem, fn) => {\r\n // const MAX_CHARACTERS = 1000 || TEXTAREA.maxLength;\r\n\r\n ClassicEditor.create(elem, CONFIG)\r\n .then(newEditor => {\r\n editor = newEditor;\r\n editor.model.document.on('change:data', () => {\r\n const data = editor.getData();\r\n fn(data);\r\n });\r\n // return true\r\n })\r\n .catch(error => {\r\n console.error(error);\r\n });\r\n\r\n};\r\n/**\r\n * Размонтирование Редактора\r\n */\r\nexport const destroyEditor = () => {\r\n editor.destroy()\r\n .catch(error => {\r\n console.log(error);\r\n });\r\n}\r\n/**\r\n * Очишает введеные данные в ckeditor5\r\n */\r\nexport const clearDataEditor = () => {\r\n editor.setData('')\r\n};\r\n","import React from \"react\";\r\nimport \"./user-menu.scss\"\r\nimport PropTypes from \"prop-types\";\r\nimport { Link, withRouter } from \"react-router-dom\";\r\nimport {deleteCookie, getActiveMenuLinks } from \"../../helpers/helpers\";\r\nimport {logOut} from \"../../data/data\";\r\nimport {showMessage, TypeMessage} from \"../../plugins/show-message\";\r\nimport { connect} from \"react-redux\";\r\n\r\nconst UserMenu = ({ user, url, history}) => {\r\n const handleClickExit = (evt) => {\r\n evt.preventDefault();\r\n\r\n const isQuestion = window.confirm(`Вы действительно хотите выйти?`);\r\n if (isQuestion) {\r\n logOut()\r\n .then(response => {\r\n showMessage(response.msgsType, '', response.textMsgs);\r\n if (response.msgsType === 'success') {\r\n deleteCookie('PHPSESSID');\r\n deleteCookie('userInfo');\r\n history.push('/sing-in');\r\n }\r\n return true;\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, );\r\n });\r\n }\r\n }\r\n\r\n return (\r\n <nav className=\"user-menu\">\r\n <span className=\"user-menu__user-name\">{`${user.surname} ${user.name} ${user.patronymic}`}</span>\r\n {\r\n getActiveMenuLinks(url).map((item, index) => {\r\n return (\r\n <Link\r\n className=\"user-menu__link link\"\r\n key={item.href + index}\r\n to={item.href}\r\n >{item.textLink}</Link>\r\n )\r\n })\r\n }\r\n <Link\r\n className=\"user-menu__link link\"\r\n to=\"/add-task\"\r\n >Поставить задачу</Link>\r\n <a\r\n className=\"user-menu__link user-menu__logout link\"\r\n onClick={handleClickExit}\r\n href=\"/log-out\">Выйти</a>\r\n </nav>\r\n )\r\n};\r\n\r\nUserMenu.propTypes = {\r\n url: PropTypes.string.isRequired,\r\n user: PropTypes.shape({\r\n surname: PropTypes.string,\r\n name: PropTypes.string,\r\n patronymic: PropTypes.string\r\n }).isRequired\r\n};\r\n\r\nconst mapStateToProps = (state) => ({ user: state.user })\r\n\r\nexport default withRouter(\r\n connect(mapStateToProps)(UserMenu)\r\n)\r\n","import React from \"react\";\r\nimport PropTypes from \"prop-types\";\r\nimport \"./task.scss\";\r\nimport {hasDateExpired} from \"../../helpers/helpers\";\r\nimport dompurify from 'dompurify';\r\nimport { Link } from \"react-router-dom\";\r\n\r\nconst sanitizer = dompurify.sanitize;\r\n\r\nconst renderDesc = (isShow, stringAndTags) => {\r\n return isShow ? sanitizer(stringAndTags) : \"\";\r\n}\r\n\r\nconst getTaskContent = (props) => {\r\n const {\r\n isShowDesc,\r\n isMore,\r\n task,\r\n userId\r\n } = props;\r\n const {\r\n task_date_end,\r\n task_title,\r\n task_desc,\r\n task_date_start,\r\n task_status,\r\n task_date_no_limit,\r\n task_id,\r\n author_name,\r\n author_surname,\r\n author_patronymic,\r\n executor_id,\r\n executor_name,\r\n executor_patronymic,\r\n executor_surname\r\n } = task;\r\n \r\n return (\r\n <React.Fragment>\r\n <h3 className=\"task__title\">{task_title}</h3>\r\n <div \r\n className=\"task__desc\"\r\n dangerouslySetInnerHTML={{ __html: renderDesc(isShowDesc, task_desc) }}\r\n >\r\n </div>\r\n <footer className=\"task__footer\">\r\n <div className=\"task__date-start\">Начало задачи: {task_date_start}\r\n </div>\r\n <div className=\"task__date-end\">Закончить задачу до: {Number(task_date_no_limit) === 1 ? 'без даты окончания' : task_date_end}\r\n </div>\r\n <div className=\"task__status\">Статус: {Number(task_status) ? 'Выполнено.': 'В работе.'}\r\n </div>\r\n <div className=\"task__execute\">\r\n {\r\n !Number(task_status) && (userId === Number(executor_id))\r\n ? <button\r\n data-id-task={task_id}\r\n data-title={task_title}\r\n onClick={props.handleClickExecuteTask}\r\n >Выполнить задачу</button>\r\n : \"\"\r\n }\r\n </div>\r\n <div className=\"task__author\">Назначил: {author_surname} {author_name} {author_patronymic}\r\n </div>\r\n <div className=\"task__executor\">Испонитель: {executor_surname} {executor_name} {executor_patronymic}\r\n </div>\r\n </footer>\r\n {\r\n isMore ?\r\n <Link\r\n to={location => ({ ...location, pathname: `/task/${task_id}` })}\r\n className=\"link\"\r\n >Подробнее</Link>\r\n : ''\r\n }\r\n </React.Fragment>\r\n )\r\n}\r\n\r\nexport const Task = (props) => {\r\n const {\r\n isShowDesc,\r\n isTasks,\r\n task\r\n } = props;\r\n const {\r\n task_date_end,\r\n task_date_no_limit\r\n } = task;\r\n\r\n if (isTasks) {\r\n return (\r\n getTaskContent(props)\r\n )\r\n }\r\n\r\n const classTaskExpired = hasDateExpired(task_date_end) && Number(task_date_no_limit) === 0 ? `task_expired` : ``;\r\n\r\n return (\r\n <section className={`task ${classTaskExpired} ${isShowDesc ? `task_single` : ''}`}>\r\n {getTaskContent(props)}\r\n </section>\r\n )\r\n}\r\n\r\nTask.propTypes = {\r\n isShowDesc: PropTypes.bool.isRequired,\r\n isMore: PropTypes.bool.isRequired,\r\n task: PropTypes.shape({\r\n task_date_end: PropTypes.string.isRequired,\r\n task_title: PropTypes.string.isRequired,\r\n task_date_start: PropTypes.string.isRequired,\r\n task_status: PropTypes.string.isRequired,\r\n author_name: PropTypes.string.isRequired,\r\n executor_name: PropTypes.string.isRequired,\r\n task_id: PropTypes.string.isRequired\r\n }).isRequired,\r\n handleClickMore: PropTypes.func\r\n};\r\n\r\nexport default Task\r\n","import React from \"react\";\r\nimport PropTypes from \"prop-types\";\r\nimport Task from \"../task/task\";\r\nimport { hasDateExpired } from \"../../helpers/helpers\";\r\nimport \"./tasks.scss\";\r\n\r\nconst option = {\r\n isMore: true,\r\n isShowDesc: false,\r\n isTasks: true\r\n};\r\n\r\nexport const Tasks = (props) => {\r\n const {\r\n title,\r\n tasks,\r\n userId\r\n } = props;\r\n\r\n return (\r\n <section className=\"tasks\">\r\n <h2 className=\"tasks__title\">{title}</h2>\r\n {\r\n tasks.length ?\r\n <ul className=\"tasks__lists\">\r\n {\r\n tasks.map((task)=> {\r\n const classTaskItem = option.isTasks ? 'task' : '';\r\n const classTaskExpired = hasDateExpired(task.task_date_end) && Number(task.task_date_no_limit) === 0 ? `task_expired` : ``;\r\n\r\n return (\r\n <li\r\n className={`tasks__item ${classTaskItem} ${classTaskExpired}`}\r\n key={task.task_id}>\r\n <Task\r\n isMore={option.isMore}\r\n isShowDesc={option.isShowDesc}\r\n isTasks={option.isTasks}\r\n task={task}\r\n userId={userId}\r\n handleClickMore={props.handleClickMore}\r\n handleClickExecuteTask={props.handleClickExecuteTask}\r\n />\r\n </li>\r\n )\r\n })\r\n }\r\n </ul> :\r\n <div>Нет никаких задач</div>\r\n }\r\n </section>\r\n )\r\n};\r\n\r\nTasks.propTypes = {\r\n title: PropTypes.string.isRequired,\r\n tasks: PropTypes.array.isRequired,\r\n handleClickMore: PropTypes.func\r\n};\r\nexport default Tasks","import React from \"react\";\r\nimport \"./pagination.scss\"\r\n\r\nconst Pagination = (props) => {\r\n const {pagesCount, pageCurrentPagination} = props;\r\n const arr = new Array(pagesCount).fill(pagesCount);\r\n const lastPage = arr.length;\r\n const pagePrev = (pageCurrentPagination - 1) === 0 ? 1 : (pageCurrentPagination - 1);\r\n const pageNext = (pageCurrentPagination + 1) > lastPage ? lastPage : (pageCurrentPagination + 1);\r\n\r\n return (\r\n <ul className=\"pagination-list\">\r\n <li className=\"pagination-list__item pagination-list__item_prev\">\r\n {\r\n pagePrev === pageCurrentPagination?\r\n <a className=\"pagination-list__link\"\r\n onClick={(evt) => evt.preventDefault()}\r\n href=\"#prev\"><</a>\r\n : <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={pagePrev} href={\"page-\" + pagePrev}><</a>\r\n }\r\n </li>\r\n {\r\n arr.map((it, index) => (\r\n <li className={`pagination-list__item${pageCurrentPagination === (index + 1) ?\r\n \" pagination-list__item_active\" \r\n : \"\"}`}\r\n key={\"page-\" + index}>\r\n <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={index + 1} href={\"page-\" + (index + 1)}>{index + 1}</a>\r\n </li>)\r\n )\r\n }\r\n <li className=\"pagination-list__item pagination-list__item_next\">\r\n {\r\n pageNext === pageCurrentPagination ?\r\n <a className=\"pagination-list__link\"\r\n onClick={(evt) => evt.preventDefault()}\r\n href=\"#next\">></a>\r\n : <a className=\"pagination-list__link\"\r\n onClick={props.handleClickChangePagePagination}\r\n data-page-id-pag={pageNext} href={\"page-\" + pageNext}>></a>\r\n }\r\n </li>\r\n </ul>\r\n )\r\n};\r\n\r\nexport default Pagination","import React from \"react\";\r\nimport \"./loading-data.scss\";\r\n\r\nconst LoadingData = () => {\r\n return (\r\n <div className=\"loader-container\">\r\n <div className=\"loader\">\r\n <div className=\"text\">Загрузка данных</div>\r\n <div className=\"dots\">\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n <div className=\"dot\"></div>\r\n </div>\r\n </div>\r\n </div>\r\n )\r\n};\r\n\r\nexport default LoadingData","import React, { Component } from \"react\";\r\nimport SearchByTasks from \"../components/search-by-tasks/search-by-tasks\";\r\nimport UserMenu from \"../components/user-menu/user-menu\";\r\nimport Tasks from \"../components/tasks/tasks\";\r\nimport Pagination from \"../components/pagination/pagination\";\r\nimport { getActiveTitleTasks, deleteTaskFromArrTasks, decodeParamsSearchUrl, checkLoggedUser } from \"../helpers/helpers\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport { getMyTasks, getMyTasksDone, getDesignatedTasks, getDesignatedTasksDone, executeTask, getResultSearchText } from \"../data/data\";\r\nimport { TypeMessage, showMessage } from '../plugins/show-message';\r\nimport LoadingData from '../components/loading-data/loading-data';\r\nimport { connect } from \"react-redux\";\r\nimport { allTasks } from \"../actions\";\r\n\r\nclass PageTasks extends Component {\r\n constructor(props){\r\n super(props);\r\n this.initialState = {\r\n itemsTasks: 9,\r\n pagesCount: 0,\r\n pageCurrentPagination: 1,\r\n loading: true,\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleClickExecuteTask = this._handleClickExecuteTask.bind(this);\r\n this._handleClickChangePagePagination = this._handleClickChangePagePagination.bind(this);\r\n }\r\n\r\n componentDidMount() {\r\n const { url } = this.props;\r\n\r\n if (url === '/search') {\r\n this._getSearchData();\r\n } else {\r\n const dataFunc = this._getFuncData(url);\r\n this._getData(dataFunc);\r\n }\r\n }\r\n\r\n componentDidUpdate(prevProps) {\r\n const { url, urlOrigin } = this.props;\r\n\r\n if ((url !== '/search') && (url !== prevProps.url)) {\r\n const dataFunc = this._getFuncData(url);\r\n this._getData(dataFunc);\r\n }\r\n\r\n if ((url === '/search') && (urlOrigin !== prevProps.urlOrigin)) {\r\n this._getSearchData();\r\n }\r\n }\r\n\r\n render() {\r\n if (!checkLoggedUser()) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n const {\r\n tasks,\r\n url,\r\n urlOrigin,\r\n user\r\n } = this.props;\r\n\r\n const { userId } = user;\r\n\r\n const textSearch = decodeParamsSearchUrl(urlOrigin);\r\n\r\n const {\r\n pageCurrentPagination,\r\n itemsTasks,\r\n pagesCount\r\n } = this.state;\r\n const visibleTasks = tasks.length ? tasks.slice((pageCurrentPagination - 1) * itemsTasks, pageCurrentPagination * itemsTasks) : tasks;\r\n\r\n return (\r\n <React.Fragment>\r\n <UserMenu\r\n url={url}\r\n />\r\n {\r\n this.state.loading ?\r\n <LoadingData /> :\r\n <React.Fragment>\r\n <SearchByTasks\r\n textSearch={textSearch}\r\n />\r\n <Tasks\r\n tasks={visibleTasks}\r\n title={getActiveTitleTasks(url, textSearch)}\r\n userId={userId}\r\n handleClickExecuteTask={this._handleClickExecuteTask}\r\n />\r\n {\r\n tasks.length > itemsTasks ?\r\n <Pagination\r\n pagesCount={pagesCount}\r\n pageCurrentPagination={pageCurrentPagination}\r\n handleClickChangePagePagination={this._handleClickChangePagePagination}\r\n />\r\n :\r\n null\r\n }\r\n </React.Fragment>\r\n }\r\n </React.Fragment>\r\n )\r\n }\r\n\r\n _getData(fn) {\r\n this.setState({\r\n loading: true,\r\n pageCurrentPagination: this.initialState.pageCurrentPagination\r\n });\r\n\r\n fn()\r\n .then(tasks => {\r\n if (tasks.msgsType === 'error') {\r\n this.props.getTasksDispatch([])\r\n return true\r\n }\r\n\r\n this.props.getTasksDispatch(tasks);\r\n\r\n const lengthTasks = tasks.length;\r\n\r\n this.setState((state) => {\r\n const { itemsTasks } = state;\r\n\r\n return {\r\n pagesCount: Math.ceil((lengthTasks / itemsTasks))\r\n }\r\n });\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n\r\n _getFuncData(url) {\r\n switch (url) {\r\n case \"/my-tasks-done\":\r\n return getMyTasksDone\r\n case \"/designated-tasks\":\r\n return getDesignatedTasks\r\n case \"/designated-tasks-done\":\r\n return getDesignatedTasksDone\r\n default:\r\n return getMyTasks\r\n }\r\n }\r\n\r\n _handleClickExecuteTask(evt) {\r\n const idTask = evt.target.dataset.idTask;\r\n const title = evt.target.dataset.title;\r\n\r\n const isQuestion = window.confirm(`Вы хотите выполнить задачу - ${title}?`)\r\n\r\n if (isQuestion) {\r\n executeTask(idTask)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n const newTasks = deleteTaskFromArrTasks(this.props.tasks, idTask);\r\n\r\n this.props.getTasksDispatch(newTasks);\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n }\r\n }\r\n\r\n _handleClickChangePagePagination(evt) {\r\n evt.preventDefault();\r\n this.setState({\r\n pageCurrentPagination: +evt.target.dataset.pageIdPag\r\n });\r\n }\r\n\r\n _getSearchData() {\r\n const textSearch = decodeParamsSearchUrl(this.props.urlOrigin) || '';\r\n\r\n getResultSearchText(textSearch)\r\n .then(tasks => {\r\n if (tasks.msgsType === 'warning') {\r\n this.props.getTasksDispatch([]);\r\n this.setState({\r\n pageCurrentPagination: this.initialState.pageCurrentPagination\r\n })\r\n return true\r\n }\r\n\r\n this.props.getTasksDispatch(tasks);\r\n\r\n const lengthTasks = tasks.length;\r\n\r\n this.setState((state) => {\r\n const { itemsTasks } = state;\r\n\r\n return {\r\n pagesCount: Math.ceil((lengthTasks / itemsTasks))\r\n }\r\n })\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n}\r\n\r\nconst mapStateToProps = (state) => ({\r\n user: state.user,\r\n tasks: state.tasks\r\n})\r\n\r\nconst mapDispatchToProps = (dispatch) => {\r\n return {\r\n getTasksDispatch: (tasks) => {\r\n dispatch(allTasks(tasks));\r\n }\r\n }\r\n}\r\n\r\nexport default connect(mapStateToProps, mapDispatchToProps)(PageTasks);\r\n","export const allTasks = (payload) => ({ type: 'GET_TASKS', payload });\r\n","export const ConfMinAndMax = Object.freeze({\r\n MIN_LENGTH_LOGIN: 2,\r\n MAX_LENGTH_LOGIN: 20,\r\n MIN_LENGTH_PASSWORD: 6,\r\n MAX_LENGTH_PASSWORD: 20,\r\n MIN_LENGTH_TEXT: 2,\r\n MAX_LENGTH_TEXT: 20\r\n });\r\nexport const ConfMinAndMaxAddTask = Object.freeze({\r\n MIN_LENGTH_TEXT: 2,\r\n MAX_LENGTH_TEXT_TITLE: 255,\r\n MAX_LENGTH_TEXT_DESK: 255,\r\n });\r\nexport const ConfTimes = Object.freeze({\r\n REDIRECTION_SIGN_IN_TIME: 3000,\r\n REDIRECTION_TASKS_TIME: 3000,\r\n });\r\n","import React, { Component } from \"react\";\r\nimport \"./forms.scss\";\r\nimport {checkLengthMinMaxStr, getCookie} from \"../../helpers/helpers\";\r\nimport { ConfMinAndMax } from \"../../vars/vars\";\r\nimport { checkLoggedUser } from \"../../helpers/helpers\";\r\nimport { signInUser } from \"../../data/data\";\r\nimport { TypeMessage, showMessage } from '../../plugins/show-message';\r\n\r\nimport { Link, withRouter } from \"react-router-dom\";\r\nimport { connect} from \"react-redux\";\r\nimport { getUserInfo } from \"../../actions\";\r\n\r\n\r\nclass FormSingIn extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n login: \"\",\r\n password: \"\",\r\n validForm: false\r\n };\r\n this.state = this.initialState;\r\n }\r\n\r\n render() {\r\n return (\r\n <form\r\n onSubmit={this._handleSubmitForm}\r\n className=\"form form_center form_auth\"\r\n method=\"post\">\r\n <h3 className=\"form__title\">Авторизация</h3>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"login\">Ваш логин:</label>\r\n <input\r\n value={this.state.login}\r\n onChange={this._handleLoginChange}\r\n className=\"form__input input\"\r\n id=\"login\" type=\"text\" name=\"login\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_LOGIN}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_LOGIN}\r\n required=\"required\"/>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password\">Пароль:</label>\r\n <input\r\n value={this.state.password}\r\n onChange={this._handlePasswordChange}\r\n className=\"form__input input\"\r\n id=\"password\" type=\"password\" name=\"password\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\"/>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <button\r\n className=\"form__button submit\"\r\n disabled={!this.state.validForm}\r\n type=\"submit\">Войти</button>\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <Link\r\n to=\"/sing-up\"\r\n className=\"form__link-signup link\"\r\n >Зарегистрироваться</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const {login, password} = state;\r\n const isValidLogin = checkLengthMinMaxStr(login, ConfMinAndMax.MIN_LENGTH_LOGIN, ConfMinAndMax.MAX_LENGTH_LOGIN);\r\n const isValidPassword = checkLengthMinMaxStr(password, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n\r\n return isValidLogin && isValidPassword;\r\n };\r\n\r\n _handleLoginChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n login: value,\r\n validForm: this._validateForm(Object.assign({}, state, {login: value}))\r\n }));\r\n };\r\n\r\n _handlePasswordChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password: value,\r\n validForm: this._validateForm(Object.assign({}, state, {password: value}))\r\n }));\r\n };\r\n\r\n _handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n\r\n let formData = new FormData(evt.target);\r\n formData.append('signin', 'ajax');\r\n\r\n signInUser(formData)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState(this.initialState);\r\n\r\n if (checkLoggedUser()) {\r\n const userInfo = getCookie(\"userInfo\").split(\";\");\r\n const user = getUserInfo({\r\n name: userInfo[0],\r\n surname: userInfo[1],\r\n patronymic: userInfo[2],\r\n userId: Number(userInfo[3])\r\n });\r\n\r\n this.props.getUserInfoToProps(user);\r\n this.props.history.push('/');\r\n }\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n };\r\n}\r\n\r\nconst mapDispatchToProps = (dispatch) => {\r\n return {\r\n getUserInfoToProps: (user) => (dispatch(user))\r\n }\r\n}\r\n\r\nexport default withRouter(\r\n connect(null, mapDispatchToProps)(FormSingIn)\r\n)\r\n","import React from \"react\";\r\nimport FormSingIn from \"../components/forms/form-sing-in\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport { checkLoggedUser} from \"../helpers/helpers\";\r\n\r\n\r\nconst PageSingIn = () => {\r\n\r\n if (checkLoggedUser()) {\r\n return (<Redirect to=\"/\" />)\r\n }\r\n\r\n return (\r\n <FormSingIn />\r\n )\r\n};\r\nexport default PageSingIn\r\n","import React, { Component } from \"react\";\r\nimport \"./forms.scss\"\r\nimport { checkLengthMinMaxStr } from \"../../helpers/helpers\";\r\nimport { ConfMinAndMax } from \"../../vars/vars\";\r\nimport { showMessage, TypeMessage } from \"../../plugins/show-message\";\r\nimport { signUpUser } from \"../../data/data\";\r\n\r\nimport { Link} from \"react-router-dom\";\r\n\r\nclass FormSingUp extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n login: \"\",\r\n password: \"\",\r\n password2: \"\",\r\n name: \"\",\r\n surname: \"\",\r\n patronymic: \"\",\r\n validForm: false\r\n };\r\n\r\n this.state = this.initialState;\r\n }\r\n\r\n render() { \r\n return (\r\n <form\r\n onSubmit={this._handleSubmitForm}\r\n className=\"form form_center form_reg\"\r\n method=\"post\">\r\n <h3 className=\"form__title\">Регистрация нового пользователя\r\n </h3>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"login\">Ваш логин:</label>\r\n <input\r\n value={this.state.login}\r\n onChange={this._handleLoginChange}\r\n className=\"form__input input\"\r\n id=\"login\" type=\"text\" name=\"login\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_LOGIN}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_LOGIN}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password\">Пароль:</label>\r\n <input\r\n value={this.state.password}\r\n onChange={this._handlePasswordChange}\r\n className=\"form__input input\"\r\n id=\"password\" type=\"password\" name=\"password\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"password2\">Повторите пароль:</label>\r\n <input\r\n value={this.state.password2}\r\n onChange={this._handlePassword2Change}\r\n onBlur={this._onBlurInput}\r\n className=\"form__input input\"\r\n id=\"password2\" type=\"password\" name=\"password2\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_PASSWORD}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_PASSWORD}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"name\">Имя:</label>\r\n <input\r\n value={this.state.name}\r\n onChange={this._handleNameChange}\r\n className=\"form__input input\"\r\n id=\"name\" type=\"text\" name=\"name\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"surname\">Фамилия:</label>\r\n <input\r\n value={this.state.surname}\r\n onChange={this._handleSurnameChange}\r\n className=\"form__input input\"\r\n id=\"surname\" type=\"text\" name=\"surname\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label htmlFor=\"patronymic\">Отчество:</label>\r\n <input\r\n value={this.state.patronymic}\r\n onChange={this.handlePatronymicChange}\r\n className=\"form__input input\"\r\n id=\"patronymic\" type=\"text\" name=\"patronymic\"\r\n minLength={ConfMinAndMax.MIN_LENGTH_TEXT}\r\n maxLength={ConfMinAndMax.MAX_LENGTH_TEXT}\r\n required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <button\r\n disabled={!this.state.validForm}\r\n className=\"form__button submit\"\r\n type=\"submit\">Зарегистрироваться</button>\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <Link\r\n to=\"/sing-in\"\r\n className=\"form__link-signup link\"\r\n >Авторизоваться</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const { login, password, password2, name, surname, patronymic } = state;\r\n const isValidLogin = checkLengthMinMaxStr(login, ConfMinAndMax.MIN_LENGTH_LOGIN, ConfMinAndMax.MAX_LENGTH_LOGIN);\r\n const isValidPassword = checkLengthMinMaxStr(password, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n const isValidPassword2 = checkLengthMinMaxStr(password2, ConfMinAndMax.MIN_LENGTH_PASSWORD, ConfMinAndMax.MAX_LENGTH_PASSWORD);\r\n const isValidEquallyPassword = password === password2;\r\n const isValidName = checkLengthMinMaxStr(name, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n const isValidSurname = checkLengthMinMaxStr(surname, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n const isValidPatronymic = checkLengthMinMaxStr(patronymic, ConfMinAndMax.MIN_LENGTH_TEXT, ConfMinAndMax.MAX_LENGTH_TEXT);\r\n\r\n return isValidLogin && isValidPassword && isValidPassword2 && isValidEquallyPassword && isValidName && isValidSurname && isValidPatronymic;\r\n };\r\n\r\n _handleLoginChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n login: value,\r\n validForm: this._validateForm(Object.assign({}, state, { login: value }))\r\n }));\r\n };\r\n\r\n _handlePasswordChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password: value,\r\n validForm: this._validateForm(Object.assign({}, state, { password: value }))\r\n }));\r\n };\r\n\r\n _handlePassword2Change = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n password2: value,\r\n validForm: this._validateForm(Object.assign({}, state, { password2: value }))\r\n }));\r\n };\r\n\r\n _handleNameChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n name: value,\r\n validForm: this._validateForm(Object.assign({}, state, { name: value }))\r\n }));\r\n };\r\n\r\n _handleSurnameChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n surname: value,\r\n validForm: this._validateForm(Object.assign({}, state, { surname: value }))\r\n }));\r\n };\r\n\r\n handlePatronymicChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n patronymic: value,\r\n validForm: this._validateForm(Object.assign({}, state, { patronymic: value }))\r\n }));\r\n };\r\n\r\n _handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n\r\n let formData = new FormData(evt.target);\r\n formData.append('signup', 'ajax');\r\n\r\n signUpUser(formData)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState(this.initialState);\r\n\r\n return true\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n };\r\n\r\n _onBlurInput = () => {\r\n const { password, password2 } = this.state;\r\n if (password.length >= ConfMinAndMax.MIN_LENGTH_PASSWORD && password !== password2) {\r\n showMessage(TypeMessage.WARNING, `В поле \"Повторите пароль\", пароль не совпадает с полем \"Пароль\"!`);\r\n }\r\n };\r\n}\r\nexport default FormSingUp","import React from \"react\";\r\nimport FormSingUp from \"../components/forms/form-sing-up\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport { checkLoggedUser} from \"../helpers/helpers\";\r\n\r\n\r\nconst PageSingUp = () => {\r\n if (checkLoggedUser()) {\r\n return (<Redirect to=\"/\" />)\r\n }\r\n\r\n return (\r\n <FormSingUp/>\r\n )\r\n};\r\nexport default PageSingUp\r\n","import React, { Component } from \"react\";\r\nimport \"./forms.scss\";\r\n\r\nimport { initFlatpickr, destroyFlatpickr } from \"../../plugins/flatpickr\";\r\nimport { initEditor, destroyEditor } from \"../../plugins/editor\";\r\nimport { checkLengthMinMaxStr } from \"../../helpers/helpers\";\r\nimport { ConfMinAndMaxAddTask } from \"../../vars/vars\";\r\nimport { getAllUsers } from \"../../data/data\";\r\nimport { TypeMessage, showMessage } from '../../plugins/show-message';\r\nimport { addTask } from \"../../data/data\";\r\nimport { clearDataEditor } from \"../../plugins/editor\";\r\nimport { clearDataFlatpickr } from \"../../plugins/flatpickr\";\r\n\r\nimport { Link } from \"react-router-dom\";\r\nimport { connect } from \"react-redux\";\r\nimport { allUsers } from \"../../actions\";\r\n\r\n\r\nclass FormAddTask extends Component {\r\n constructor(props) {\r\n super(props);\r\n this.initialState = {\r\n selectedDates: \"\",\r\n isCheckedDateNoLimit: false,\r\n valueSelect: \"disabled\",\r\n titleTask: \"\",\r\n descTask: \"\",\r\n validForm: false,\r\n };\r\n this.state = this.initialState;\r\n\r\n this.inputDatesRef = React.createRef();\r\n this.textareaRef = React.createRef();\r\n }\r\n\r\n componentDidMount() {\r\n initFlatpickr(this.inputDatesRef.current);\r\n initEditor(this.textareaRef.current, this._handleDescTaskChange);\r\n getAllUsers()\r\n .then(users => {\r\n if (users.msgsType === 'error') {\r\n this.props.getAllUsersDispatch([]);\r\n return;\r\n }\r\n\r\n this.props.getAllUsersDispatch(users);\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n });\r\n }\r\n\r\n componentWillUnmount() {\r\n destroyEditor();\r\n destroyFlatpickr();\r\n }\r\n\r\n render() {\r\n const { userId: userIdCurrent } = this.props.user;\r\n\r\n return (\r\n <form\r\n onSubmit={this.handleSubmitForm}\r\n className=\"form form_task-add\"\r\n action=\"\" method=\"post\">\r\n <div className=\"form__row form__row_label-group-two\">\r\n <label htmlFor=\"date\">Дата начала и окончания задачи</label>\r\n <div\r\n ref={this.inputDatesRef}\r\n className=\"flatpickr\">\r\n <input\r\n className=\"form__date input\"\r\n onInput={this._handleDatesChange}\r\n id=\"date\" type=\"text\" name=\"date\"\r\n placeholder=\"выберите дату или даты\" data-input=\"data-input\" required=\"required\" />\r\n <button type=\"button\" title=\"Открыт/Закрыть календарь\" data-toggle=\"\">календарь</button>\r\n <button type=\"button\" title=\"Очистить календарь\" data-clear=\"\">очистить</button>\r\n </div>\r\n </div>\r\n <div className=\"form__row\">\r\n <input\r\n className=\"form__checkbox\"\r\n onChange={this._handleDateNoLimitChange}\r\n checked={this.state.isCheckedDateNoLimit}\r\n type=\"checkbox\" name=\"date-no-limit\" id=\"date-no-limit\" />\r\n <label htmlFor=\"date-no-limit\">Без даты окончания (дата окончания выбранная выше, будет игнорирована)</label>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <span>Выберите исполнителя</span>\r\n <select\r\n value={this.state.valueSelect}\r\n onChange={this._handleSelectChange}\r\n className=\"form__select\" name=\"executor\" required=\"required\">\r\n <option value=\"disabled\" disabled=\"disabled\">Не выбрано</option>\r\n {\r\n this.props.users.map(user => (\r\n <option\r\n value={user.user_id}\r\n key={user.user_id}\r\n > { userIdCurrent === Number(user.user_id) ? \"Я\" : `${user.user_surname} ${user.user_name} ${user.user_patronymic}` } </option>\r\n ))\r\n }\r\n </select>\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label>Загаловок задачи</label>\r\n <textarea\r\n value={this.state.titleTask}\r\n onChange={this._handleTitleTaskChange}\r\n className=\"form__title-add textarea\" name=\"title\" maxLength=\"255\" placeholder=\"сделать ...\" required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_content-column\">\r\n <label>Дополнительная информация по задаче</label>\r\n <textarea\r\n className=\"textarea\"\r\n ref={this.textareaRef}\r\n value={this.state.descTask}\r\n onChange={this._handleDescTaskChange}\r\n id=\"textarea-text\" name=\"text\" maxLength=\"1000\" placeholder=\"Обьяснение задачи ...\" required=\"required\" />\r\n </div>\r\n <div className=\"form__row form__row_text-center\">\r\n <button\r\n disabled={!this.state.validForm}\r\n className=\"form__submit submit\"\r\n type=\"submit\">Добавить задачу</button>\r\n <Link\r\n className=\"form__link link\"\r\n to=\"/\"\r\n >К списку моих задач</Link>\r\n </div>\r\n </form>\r\n )\r\n }\r\n\r\n _validateForm = (state) => {\r\n const { selectedDates, valueSelect, titleTask, descTask } = state;\r\n const isValidValueSelect = valueSelect !== \"disabled\";\r\n const isValidTitleTask = checkLengthMinMaxStr(titleTask, ConfMinAndMaxAddTask.MIN_LENGTH_TEXT, ConfMinAndMaxAddTask.MAX_LENGTH_TEXT_TITLE);\r\n const isValidDescTask = checkLengthMinMaxStr(descTask, ConfMinAndMaxAddTask.MIN_LENGTH_TEXT, ConfMinAndMaxAddTask.MAX_LENGTH_TEXT_DESK);\r\n\r\n return selectedDates && isValidValueSelect && isValidTitleTask && isValidDescTask;\r\n };\r\n\r\n _handleDatesChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n selectedDates: value,\r\n validForm: this._validateForm(Object.assign(state, { selectedDates: value }))\r\n }));\r\n };\r\n\r\n _handleDateNoLimitChange = () => {\r\n this.setState((state) => ({\r\n isCheckedDateNoLimit: !state.isCheckedDateNoLimit\r\n }));\r\n };\r\n\r\n _handleTitleTaskChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n titleTask: value,\r\n validForm: this._validateForm(Object.assign(state, { titleTask: value }))\r\n }));\r\n };\r\n\r\n _handleDescTaskChange = (data) => {\r\n this.setState((state) => ({\r\n descTask: data,\r\n validForm: this._validateForm(Object.assign(state, { descTask: data }))\r\n }));\r\n };\r\n\r\n _handleSelectChange = (evt) => {\r\n const value = evt.target.value;\r\n this.setState((state) => ({\r\n valueSelect: value,\r\n validForm: this._validateForm(Object.assign(state, { valueSelect: value }))\r\n }));\r\n };\r\n\r\n handleSubmitForm = (evt) => {\r\n evt.preventDefault();\r\n let FORM_DATA = new FormData(evt.target);\r\n FORM_DATA.append('add-task', 'ajax');\r\n\r\n addTask(FORM_DATA)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.setState({\r\n isCheckedDateNoLimit: false,\r\n valueSelect: \"disabled\",\r\n titleTask: \"\",\r\n validForm: false,\r\n })\r\n\r\n clearDataEditor();\r\n clearDataFlatpickr();\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n };\r\n}\r\n\r\nconst mapStateToProps = (state) => ({\r\n user: state.user,\r\n users: state.users\r\n})\r\n\r\nconst mapDispatchToProps = (dispatch) => {\r\n return {\r\n getAllUsersDispatch: (users) => {\r\n dispatch(allUsers(users));\r\n }\r\n }\r\n}\r\n\r\nexport default connect(mapStateToProps, mapDispatchToProps)(FormAddTask);\r\n","export const allUsers = (payload) => ({ type: 'GET_ALL_USERS', payload });\r\n","import React from \"react\";\r\nimport FormAddTask from \"../components/forms/form-add-task\";\r\n\r\nimport { Redirect } from \"react-router-dom\";\r\nimport { checkLoggedUser } from '../helpers/helpers'\r\n\r\nconst PageAddTask = () => {\r\n\r\n if (!checkLoggedUser()) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n return (\r\n <FormAddTask />\r\n )\r\n};\r\nexport default PageAddTask\r\n","import React, { Component } from \"react\";\r\nimport Task from \"../components/task/task\"\r\nimport UserMenu from \"../components/user-menu/user-menu\";\r\nimport { Redirect } from \"react-router-dom\";\r\nimport LoadingData from '../components/loading-data/loading-data';\r\nimport { getTask, executeTask } from \"../data/data\";\r\nimport { TypeMessage, showMessage } from '../plugins/show-message';\r\nimport { checkLoggedUser } from \"../helpers/helpers\";\r\nimport {connect} from \"react-redux\";\r\nimport { fetchTask, toPerformTask } from \"../actions\";\r\n\r\n\r\nconst option = {\r\n isMore: false,\r\n isShowDesc: true\r\n};\r\n\r\nclass PageTask extends Component {\r\n constructor(props){\r\n super(props);\r\n this.initialState = {\r\n loading: true\r\n };\r\n this.state = this.initialState;\r\n\r\n this._handleClickExecuteTask = this._handleClickExecuteTask.bind(this);\r\n }\r\n\r\n componentDidMount() {\r\n const idTask = this.props.idTask;\r\n\r\n getTask(idTask)\r\n .then(task => {\r\n if (task.msgsType === 'error') {\r\n this.props.fetchTaskDispatch(null);\r\n }\r\n\r\n this.props.fetchTaskDispatch(task);\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Ошибка получения данных.');\r\n })\r\n .finally(() => {\r\n this.setState({ loading: false });\r\n });\r\n }\r\n\r\n render() {\r\n if (!checkLoggedUser()) {\r\n return (<Redirect to=\"/sing-in\" />)\r\n }\r\n\r\n const {\r\n user,\r\n handleClickExit,\r\n url,\r\n task\r\n } = this.props;\r\n\r\n const { userId } = user;\r\n\r\n return (\r\n <React.Fragment>\r\n <UserMenu\r\n handleClickExit={handleClickExit}\r\n user={user}\r\n url={url}\r\n />\r\n {\r\n this.state.loading ?\r\n <LoadingData /> :\r\n task ?\r\n <Task\r\n isMore={option.isMore}\r\n isShowDesc={option.isShowDesc}\r\n task={task}\r\n userId={userId}\r\n handleClickExecuteTask={this._handleClickExecuteTask}\r\n /> :\r\n <p>Такая задача не существует!</p>\r\n }\r\n </React.Fragment>\r\n )\r\n }\r\n\r\n _handleClickExecuteTask(evt) {\r\n const idTask = evt.target.dataset.idTask;\r\n const title = evt.target.dataset.title;\r\n\r\n const isQuestion = window.confirm(`Вы хотите выполнить задачу - ${title}?`)\r\n\r\n if (isQuestion) {\r\n executeTask(idTask)\r\n .then(result => {\r\n showMessage(result.msgsType, '', result.textMsgs);\r\n if (result.msgsType === 'success') {\r\n this.props.executeTaskDispatch(this.props.task);\r\n }\r\n })\r\n .catch(e => {\r\n console.error(e);\r\n showMessage(TypeMessage.ERROR, e, 'Произошла ошибка.');\r\n });\r\n }\r\n }\r\n}\r\n\r\nconst mapStateToProps = (state) => {\r\n return {\r\n user: state.user,\r\n task: state.task\r\n }\r\n}\r\n\r\nconst mapDispatchToProps = (dispatch) => {\r\n return {\r\n fetchTaskDispatch: (task) => {\r\n dispatch(fetchTask(task));\r\n },\r\n executeTaskDispatch: (task) => {\r\n dispatch(toPerformTask(task));\r\n }\r\n }\r\n}\r\n\r\nexport default connect(mapStateToProps, mapDispatchToProps)(PageTask);\r\n","export const fetchTask = (payload) => ({type: 'FETCH_TASK', payload});\r\nexport const toPerformTask = (payload) => ({type: 'EXECUTE_TASK', payload});\r\n","import React, { Component } from 'react';\nimport Container from \"./components/container/container\";\nimport Footer from './components/footer/footer';\nimport { getCookie, checkLoggedUser } from \"./helpers/helpers\";\n\nimport { BrowserRouter as Router, Route, Switch } from 'react-router-dom';\nimport { connect} from \"react-redux\";\nimport { getUserInfo} from \"./actions\";\n\nimport PageTasks from './pages/page-tasks';\nimport PageSingIn from './pages/page-sign-in';\nimport PageSingUp from './pages/page-sign-up';\nimport PageAddTask from \"./pages/page-add-task\";\nimport PageTask from \"./pages/page-task\";\n\nimport 'normalize.css';\nimport './Common.scss'\n\nexport class App extends Component {\n constructor(props) {\n super(props);\n\n this.initialState = {\n textSearch: '',\n };\n\n this.state = this.initialState;\n }\n\n componentDidMount() {\n if (checkLoggedUser()) {\n const userInfo = getCookie(\"userInfo\").split(\";\");\n const user = getUserInfo({\n name: userInfo[0],\n surname: userInfo[1],\n patronymic: userInfo[2],\n userId: Number(userInfo[3])\n });\n\n this.props.getUserInfoDispatch(user);\n }\n }\n\n render() {\n return (\n <Router basename=\"/react/\" >\n <main className={`bg main`}>\n <Container>\n <Switch>\n <Route\n path=\"/\"\n render={this.renderPageTasks}\n exact />\n <Route\n path=\"/search\"\n render={this.renderPageTasks}\n />\n <Route\n path=\"/my-tasks-done\"\n render={this.renderPageTasks}\n />\n <Route\n path=\"/designated-tasks\"\n render={this.renderPageTasks}\n />\n <Route\n path=\"/designated-tasks-done\"\n render={this.renderPageTasks}\n />\n <Route\n path=\"/sing-up\"\n render={()=>(\n <PageSingUp\n />\n )} />\n <Route\n path=\"/sing-in\"\n render={() => (\n <PageSingIn />\n )} />\n <Route\n path=\"/add-task\"\n render={()=>(\n <PageAddTask />\n )}\n />\n <Route\n path=\"/task/:id\"\n render={({ match })=> {\n const { id } = match.params;\n\n return <PageTask\n url={match.url}\n idTask={id}\n />\n }\n }\n />\n <Route render={()=>(<h1>Такой страницы нету!</h1>)} />\n </Switch>\n </Container>\n </main>\n <Footer />\n </Router>\n )\n }\n\n renderPageTasks = ({ location, match }) => {\n return <PageTasks\n url={match.url}\n urlOrigin={`${window.location.origin}${location.search}`}\n />;\n }\n}\n\nconst mapDispatchToProps = (dispatch) => ({\n getUserInfoDispatch: (user) => {\n dispatch(user);\n }\n})\n\nexport default connect(null, mapDispatchToProps)(App);\n","// This optional code is used to register a service worker.\n// register() is not called by default.\n\n// This lets the app load faster on subsequent visits in production, and gives\n// it offline capabilities. However, it also means that developers (and users)\n// will only see deployed updates on subsequent visits to a page, after all the\n// existing tabs open on the page have been closed, since previously cached\n// resources are updated in the background.\n\n// To learn more about the benefits of this model and instructions on how to\n// opt-in, read https://bit.ly/CRA-PWA\n\nconst isLocalhost = Boolean(\n window.location.hostname === 'localhost' ||\n // [::1] is the IPv6 localhost address.\n window.location.hostname === '[::1]' ||\n // 127.0.0.0/8 are considered localhost for IPv4.\n window.location.hostname.match(\n /^127(?:\\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/\n )\n);\n\nexport function register(config) {\n if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {\n // The URL constructor is available in all browsers that support SW.\n const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);\n if (publicUrl.origin !== window.location.origin) {\n // Our service worker won't work if PUBLIC_URL is on a different origin\n // from what our page is served on. This might happen if a CDN is used to\n // serve assets; see https://github.com/facebook/create-react-app/issues/2374\n return;\n }\n\n window.addEventListener('load', () => {\n const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;\n\n if (isLocalhost) {\n // This is running on localhost. Let's check if a service worker still exists or not.\n checkValidServiceWorker(swUrl, config);\n\n // Add some additional logging to localhost, pointing developers to the\n // service worker/PWA documentation.\n navigator.serviceWorker.ready.then(() => {\n console.log(\n 'This web app is being served cache-first by a service ' +\n 'worker. To learn more, visit https://bit.ly/CRA-PWA'\n );\n });\n } else {\n // Is not localhost. Just register service worker\n registerValidSW(swUrl, config);\n }\n });\n }\n}\n\nfunction registerValidSW(swUrl, config) {\n navigator.serviceWorker\n .register(swUrl)\n .then(registration => {\n registration.onupdatefound = () => {\n const installingWorker = registration.installing;\n if (installingWorker == null) {\n return;\n }\n installingWorker.onstatechange = () => {\n if (installingWorker.state === 'installed') {\n if (navigator.serviceWorker.controller) {\n // At this point, the updated precached content has been fetched,\n // but the previous service worker will still serve the older\n // content until all client tabs are closed.\n console.log(\n 'New content is available and will be used when all ' +\n 'tabs for this page are closed. See https://bit.ly/CRA-PWA.'\n );\n\n // Execute callback\n if (config && config.onUpdate) {\n config.onUpdate(registration);\n }\n } else {\n // At this point, everything has been precached.\n // It's the perfect time to display a\n // \"Content is cached for offline use.\" message.\n console.log('Content is cached for offline use.');\n\n // Execute callback\n if (config && config.onSuccess) {\n config.onSuccess(registration);\n }\n }\n }\n };\n };\n })\n .catch(error => {\n console.error('Error during service worker registration:', error);\n });\n}\n\nfunction checkValidServiceWorker(swUrl, config) {\n // Check if the service worker can be found. If it can't reload the page.\n fetch(swUrl, {\n headers: { 'Service-Worker': 'script' }\n })\n .then(response => {\n // Ensure service worker exists, and that we really are getting a JS file.\n const contentType = response.headers.get('content-type');\n if (\n response.status === 404 ||\n (contentType != null && contentType.indexOf('javascript') === -1)\n ) {\n // No service worker found. Probably a different app. Reload the page.\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister().then(() => {\n window.location.reload();\n });\n });\n } else {\n // Service worker found. Proceed as normal.\n registerValidSW(swUrl, config);\n }\n })\n .catch(() => {\n console.log(\n 'No internet connection found. App is running in offline mode.'\n );\n });\n}\n\nexport function unregister() {\n if ('serviceWorker' in navigator) {\n navigator.serviceWorker.ready.then(registration => {\n registration.unregister();\n });\n }\n}\n","import React from 'react';\nimport ReactDOM from 'react-dom';\nimport { applyMiddleware, createStore, compose } from 'redux'\nimport { Provider } from 'react-redux';\nimport thunkMiddleware from 'redux-thunk';\nimport rootReducer from './reducers';\nimport './index.css';\nimport App from './App';\nimport * as serviceWorker from './serviceWorker';\n\nconst middlewareEnhancer = applyMiddleware(thunkMiddleware);\nconst composedEnhancers = compose(middlewareEnhancer);\nconst store = createStore(rootReducer, undefined, composedEnhancers);\n\nReactDOM.render(\n <Provider store={store}>\n <App />\n </Provider>\n , document.querySelector('.root')\n );\n\n// If you want your app to work offline and load faster, you can change\n// unregister() to register() below. Note this comes with some pitfalls.\n// Learn more about service workers: https://bit.ly/CRA-PWA\nserviceWorker.unregister();\n"],"sourceRoot":""} \ No newline at end of file diff --git a/spa-react/package.json b/spa-react/package.json index b643afa..68dbee7 100644 --- a/spa-react/package.json +++ b/spa-react/package.json @@ -23,7 +23,7 @@ }, "scripts": { "start": "react-scripts start", - "build": "react-scripts build", + "build": "react-scripts --max_old_space_size=6096 build", "test": "react-scripts test", "eject": "react-scripts eject" },